diff --git a/tools/virtiofsd/buffer.c b/tools/virtiofsd/buffer.c
index aefb7dbf15..5df946c82c 100644
--- a/tools/virtiofsd/buffer.c
+++ b/tools/virtiofsd/buffer.c
@@ -1,252 +1,272 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2010  Miklos Szeredi <miklos@szeredi.hu>
-
-  Functions for dealing with `struct fuse_buf` and `struct
-  fuse_bufvec`.
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2010  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * Functions for dealing with `struct fuse_buf` and `struct
+ * fuse_bufvec`.
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB
+ */
 
 #define _GNU_SOURCE
 
 #include "config.h"
 #include "fuse_i.h"
 #include "fuse_lowlevel.h"
+#include <assert.h>
+#include <errno.h>
 #include <string.h>
 #include <unistd.h>
-#include <errno.h>
-#include <assert.h>
 
 size_t fuse_buf_size(const struct fuse_bufvec *bufv)
 {
-	size_t i;
-	size_t size = 0;
-
-	for (i = 0; i < bufv->count; i++) {
-		if (bufv->buf[i].size == SIZE_MAX)
-			size = SIZE_MAX;
-		else
-			size += bufv->buf[i].size;
-	}
-
-	return size;
+    size_t i;
+    size_t size = 0;
+
+    for (i = 0; i < bufv->count; i++) {
+        if (bufv->buf[i].size == SIZE_MAX) {
+            size = SIZE_MAX;
+        } else {
+            size += bufv->buf[i].size;
+        }
+    }
+
+    return size;
 }
 
 static size_t min_size(size_t s1, size_t s2)
 {
-	return s1 < s2 ? s1 : s2;
+    return s1 < s2 ? s1 : s2;
 }
 
 static ssize_t fuse_buf_write(const struct fuse_buf *dst, size_t dst_off,
-			      const struct fuse_buf *src, size_t src_off,
-			      size_t len)
+                              const struct fuse_buf *src, size_t src_off,
+                              size_t len)
 {
-	ssize_t res = 0;
-	size_t copied = 0;
-
-	while (len) {
-		if (dst->flags & FUSE_BUF_FD_SEEK) {
-			res = pwrite(dst->fd, (char *)src->mem + src_off, len,
-				     dst->pos + dst_off);
-		} else {
-			res = write(dst->fd, (char *)src->mem + src_off, len);
-		}
-		if (res == -1) {
-			if (!copied)
-				return -errno;
-			break;
-		}
-		if (res == 0)
-			break;
-
-		copied += res;
-		if (!(dst->flags & FUSE_BUF_FD_RETRY))
-			break;
-
-		src_off += res;
-		dst_off += res;
-		len -= res;
-	}
-
-	return copied;
+    ssize_t res = 0;
+    size_t copied = 0;
+
+    while (len) {
+        if (dst->flags & FUSE_BUF_FD_SEEK) {
+            res = pwrite(dst->fd, (char *)src->mem + src_off, len,
+                         dst->pos + dst_off);
+        } else {
+            res = write(dst->fd, (char *)src->mem + src_off, len);
+        }
+        if (res == -1) {
+            if (!copied) {
+                return -errno;
+            }
+            break;
+        }
+        if (res == 0) {
+            break;
+        }
+
+        copied += res;
+        if (!(dst->flags & FUSE_BUF_FD_RETRY)) {
+            break;
+        }
+
+        src_off += res;
+        dst_off += res;
+        len -= res;
+    }
+
+    return copied;
 }
 
 static ssize_t fuse_buf_read(const struct fuse_buf *dst, size_t dst_off,
-			     const struct fuse_buf *src, size_t src_off,
-			     size_t len)
+                             const struct fuse_buf *src, size_t src_off,
+                             size_t len)
 {
-	ssize_t res = 0;
-	size_t copied = 0;
-
-	while (len) {
-		if (src->flags & FUSE_BUF_FD_SEEK) {
-			res = pread(src->fd, (char *)dst->mem + dst_off, len,
-				     src->pos + src_off);
-		} else {
-			res = read(src->fd, (char *)dst->mem + dst_off, len);
-		}
-		if (res == -1) {
-			if (!copied)
-				return -errno;
-			break;
-		}
-		if (res == 0)
-			break;
-
-		copied += res;
-		if (!(src->flags & FUSE_BUF_FD_RETRY))
-			break;
-
-		dst_off += res;
-		src_off += res;
-		len -= res;
-	}
-
-	return copied;
+    ssize_t res = 0;
+    size_t copied = 0;
+
+    while (len) {
+        if (src->flags & FUSE_BUF_FD_SEEK) {
+            res = pread(src->fd, (char *)dst->mem + dst_off, len,
+                        src->pos + src_off);
+        } else {
+            res = read(src->fd, (char *)dst->mem + dst_off, len);
+        }
+        if (res == -1) {
+            if (!copied) {
+                return -errno;
+            }
+            break;
+        }
+        if (res == 0) {
+            break;
+        }
+
+        copied += res;
+        if (!(src->flags & FUSE_BUF_FD_RETRY)) {
+            break;
+        }
+
+        dst_off += res;
+        src_off += res;
+        len -= res;
+    }
+
+    return copied;
 }
 
 static ssize_t fuse_buf_fd_to_fd(const struct fuse_buf *dst, size_t dst_off,
-				 const struct fuse_buf *src, size_t src_off,
-				 size_t len)
+                                 const struct fuse_buf *src, size_t src_off,
+                                 size_t len)
 {
-	char buf[4096];
-	struct fuse_buf tmp = {
-		.size = sizeof(buf),
-		.flags = 0,
-	};
-	ssize_t res;
-	size_t copied = 0;
-
-	tmp.mem = buf;
-
-	while (len) {
-		size_t this_len = min_size(tmp.size, len);
-		size_t read_len;
-
-		res = fuse_buf_read(&tmp, 0, src, src_off, this_len);
-		if (res < 0) {
-			if (!copied)
-				return res;
-			break;
-		}
-		if (res == 0)
-			break;
-
-		read_len = res;
-		res = fuse_buf_write(dst, dst_off, &tmp, 0, read_len);
-		if (res < 0) {
-			if (!copied)
-				return res;
-			break;
-		}
-		if (res == 0)
-			break;
-
-		copied += res;
-
-		if (res < this_len)
-			break;
-
-		dst_off += res;
-		src_off += res;
-		len -= res;
-	}
-
-	return copied;
+    char buf[4096];
+    struct fuse_buf tmp = {
+        .size = sizeof(buf),
+        .flags = 0,
+    };
+    ssize_t res;
+    size_t copied = 0;
+
+    tmp.mem = buf;
+
+    while (len) {
+        size_t this_len = min_size(tmp.size, len);
+        size_t read_len;
+
+        res = fuse_buf_read(&tmp, 0, src, src_off, this_len);
+        if (res < 0) {
+            if (!copied) {
+                return res;
+            }
+            break;
+        }
+        if (res == 0) {
+            break;
+        }
+
+        read_len = res;
+        res = fuse_buf_write(dst, dst_off, &tmp, 0, read_len);
+        if (res < 0) {
+            if (!copied) {
+                return res;
+            }
+            break;
+        }
+        if (res == 0) {
+            break;
+        }
+
+        copied += res;
+
+        if (res < this_len) {
+            break;
+        }
+
+        dst_off += res;
+        src_off += res;
+        len -= res;
+    }
+
+    return copied;
 }
 
 static ssize_t fuse_buf_copy_one(const struct fuse_buf *dst, size_t dst_off,
-				 const struct fuse_buf *src, size_t src_off,
-				 size_t len, enum fuse_buf_copy_flags flags)
+                                 const struct fuse_buf *src, size_t src_off,
+                                 size_t len, enum fuse_buf_copy_flags flags)
 {
-	int src_is_fd = src->flags & FUSE_BUF_IS_FD;
-	int dst_is_fd = dst->flags & FUSE_BUF_IS_FD;
-
-	if (!src_is_fd && !dst_is_fd) {
-		char *dstmem = (char *)dst->mem + dst_off;
-		char *srcmem = (char *)src->mem + src_off;
-
-		if (dstmem != srcmem) {
-			if (dstmem + len <= srcmem || srcmem + len <= dstmem)
-				memcpy(dstmem, srcmem, len);
-			else
-				memmove(dstmem, srcmem, len);
-		}
-
-		return len;
-	} else if (!src_is_fd) {
-		return fuse_buf_write(dst, dst_off, src, src_off, len);
-	} else if (!dst_is_fd) {
-		return fuse_buf_read(dst, dst_off, src, src_off, len);
-	} else {
-		return fuse_buf_fd_to_fd(dst, dst_off, src, src_off, len);
-	}
+    int src_is_fd = src->flags & FUSE_BUF_IS_FD;
+    int dst_is_fd = dst->flags & FUSE_BUF_IS_FD;
+
+    if (!src_is_fd && !dst_is_fd) {
+        char *dstmem = (char *)dst->mem + dst_off;
+        char *srcmem = (char *)src->mem + src_off;
+
+        if (dstmem != srcmem) {
+            if (dstmem + len <= srcmem || srcmem + len <= dstmem) {
+                memcpy(dstmem, srcmem, len);
+            } else {
+                memmove(dstmem, srcmem, len);
+            }
+        }
+
+        return len;
+    } else if (!src_is_fd) {
+        return fuse_buf_write(dst, dst_off, src, src_off, len);
+    } else if (!dst_is_fd) {
+        return fuse_buf_read(dst, dst_off, src, src_off, len);
+    } else {
+        return fuse_buf_fd_to_fd(dst, dst_off, src, src_off, len);
+    }
 }
 
 static const struct fuse_buf *fuse_bufvec_current(struct fuse_bufvec *bufv)
 {
-	if (bufv->idx < bufv->count)
-		return &bufv->buf[bufv->idx];
-	else
-		return NULL;
+    if (bufv->idx < bufv->count) {
+        return &bufv->buf[bufv->idx];
+    } else {
+        return NULL;
+    }
 }
 
 static int fuse_bufvec_advance(struct fuse_bufvec *bufv, size_t len)
 {
-	const struct fuse_buf *buf = fuse_bufvec_current(bufv);
-
-	bufv->off += len;
-	assert(bufv->off <= buf->size);
-	if (bufv->off == buf->size) {
-		assert(bufv->idx < bufv->count);
-		bufv->idx++;
-		if (bufv->idx == bufv->count)
-			return 0;
-		bufv->off = 0;
-	}
-	return 1;
+    const struct fuse_buf *buf = fuse_bufvec_current(bufv);
+
+    bufv->off += len;
+    assert(bufv->off <= buf->size);
+    if (bufv->off == buf->size) {
+        assert(bufv->idx < bufv->count);
+        bufv->idx++;
+        if (bufv->idx == bufv->count) {
+            return 0;
+        }
+        bufv->off = 0;
+    }
+    return 1;
 }
 
 ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv,
-		      enum fuse_buf_copy_flags flags)
+                      enum fuse_buf_copy_flags flags)
 {
-	size_t copied = 0;
-
-	if (dstv == srcv)
-		return fuse_buf_size(dstv);
-
-	for (;;) {
-		const struct fuse_buf *src = fuse_bufvec_current(srcv);
-		const struct fuse_buf *dst = fuse_bufvec_current(dstv);
-		size_t src_len;
-		size_t dst_len;
-		size_t len;
-		ssize_t res;
-
-		if (src == NULL || dst == NULL)
-			break;
-
-		src_len = src->size - srcv->off;
-		dst_len = dst->size - dstv->off;
-		len = min_size(src_len, dst_len);
-
-		res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len, flags);
-		if (res < 0) {
-			if (!copied)
-				return res;
-			break;
-		}
-		copied += res;
-
-		if (!fuse_bufvec_advance(srcv, res) ||
-		    !fuse_bufvec_advance(dstv, res))
-			break;
-
-		if (res < len)
-			break;
-	}
-
-	return copied;
+    size_t copied = 0;
+
+    if (dstv == srcv) {
+        return fuse_buf_size(dstv);
+    }
+
+    for (;;) {
+        const struct fuse_buf *src = fuse_bufvec_current(srcv);
+        const struct fuse_buf *dst = fuse_bufvec_current(dstv);
+        size_t src_len;
+        size_t dst_len;
+        size_t len;
+        ssize_t res;
+
+        if (src == NULL || dst == NULL) {
+            break;
+        }
+
+        src_len = src->size - srcv->off;
+        dst_len = dst->size - dstv->off;
+        len = min_size(src_len, dst_len);
+
+        res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len, flags);
+        if (res < 0) {
+            if (!copied) {
+                return res;
+            }
+            break;
+        }
+        copied += res;
+
+        if (!fuse_bufvec_advance(srcv, res) ||
+            !fuse_bufvec_advance(dstv, res)) {
+            break;
+        }
+
+        if (res < len) {
+            break;
+        }
+    }
+
+    return copied;
 }
diff --git a/tools/virtiofsd/fuse.h b/tools/virtiofsd/fuse.h
index 3202fba6bb..7a4c713559 100644
--- a/tools/virtiofsd/fuse.h
+++ b/tools/virtiofsd/fuse.h
@@ -1,15 +1,15 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB.
+ */
 
 #ifndef FUSE_H_
 #define FUSE_H_
 
-/** @file
+/*
  *
  * This file defines the library interface of FUSE
  *
@@ -19,15 +19,15 @@
 #include "fuse_common.h"
 
 #include <fcntl.h>
-#include <time.h>
-#include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/statvfs.h>
+#include <sys/types.h>
 #include <sys/uio.h>
+#include <time.h>
 
-/* ----------------------------------------------------------- *
- * Basic FUSE API					       *
- * ----------------------------------------------------------- */
+/*
+ * Basic FUSE API
+ */
 
 /** Handle for a FUSE filesystem */
 struct fuse;
@@ -36,38 +36,39 @@ struct fuse;
  * Readdir flags, passed to ->readdir()
  */
 enum fuse_readdir_flags {
-	/**
-	 * "Plus" mode.
-	 *
-	 * The kernel wants to prefill the inode cache during readdir.  The
-	 * filesystem may honour this by filling in the attributes and setting
-	 * FUSE_FILL_DIR_FLAGS for the filler function.  The filesystem may also
-	 * just ignore this flag completely.
-	 */
-	FUSE_READDIR_PLUS = (1 << 0),
+    /**
+     * "Plus" mode.
+     *
+     * The kernel wants to prefill the inode cache during readdir.  The
+     * filesystem may honour this by filling in the attributes and setting
+     * FUSE_FILL_DIR_FLAGS for the filler function.  The filesystem may also
+     * just ignore this flag completely.
+     */
+    FUSE_READDIR_PLUS = (1 << 0),
 };
 
 enum fuse_fill_dir_flags {
-	/**
-	 * "Plus" mode: all file attributes are valid
-	 *
-	 * The attributes are used by the kernel to prefill the inode cache
-	 * during a readdir.
-	 *
-	 * It is okay to set FUSE_FILL_DIR_PLUS if FUSE_READDIR_PLUS is not set
-	 * and vice versa.
-	 */
-	FUSE_FILL_DIR_PLUS = (1 << 1),
+    /**
+     * "Plus" mode: all file attributes are valid
+     *
+     * The attributes are used by the kernel to prefill the inode cache
+     * during a readdir.
+     *
+     * It is okay to set FUSE_FILL_DIR_PLUS if FUSE_READDIR_PLUS is not set
+     * and vice versa.
+     */
+    FUSE_FILL_DIR_PLUS = (1 << 1),
 };
 
-/** Function to add an entry in a readdir() operation
+/**
+ * Function to add an entry in a readdir() operation
  *
  * The *off* parameter can be any non-zero value that enables the
  * filesystem to identify the current point in the directory
  * stream. It does not need to be the actual physical position. A
  * value of zero is reserved to indicate that seeking in directories
  * is not supported.
- * 
+ *
  * @param buf the buffer passed to the readdir() operation
  * @param name the file name of the directory entry
  * @param stat file attributes, can be NULL
@@ -75,9 +76,9 @@ enum fuse_fill_dir_flags {
  * @param flags fill flags
  * @return 1 if buffer is full, zero otherwise
  */
-typedef int (*fuse_fill_dir_t) (void *buf, const char *name,
-				const struct stat *stbuf, off_t off,
-				enum fuse_fill_dir_flags flags);
+typedef int (*fuse_fill_dir_t)(void *buf, const char *name,
+                               const struct stat *stbuf, off_t off,
+                               enum fuse_fill_dir_flags flags);
 /**
  * Configuration of the high-level API
  *
@@ -87,186 +88,186 @@ typedef int (*fuse_fill_dir_t) (void *buf, const char *name,
  * file system implementation.
  */
 struct fuse_config {
-	/**
-	 * If `set_gid` is non-zero, the st_gid attribute of each file
-	 * is overwritten with the value of `gid`.
-	 */
-	int set_gid;
-	unsigned int gid;
-
-	/**
-	 * If `set_uid` is non-zero, the st_uid attribute of each file
-	 * is overwritten with the value of `uid`.
-	 */
-	int set_uid;
-	unsigned int uid;
-
-	/**
-	 * If `set_mode` is non-zero, the any permissions bits set in
-	 * `umask` are unset in the st_mode attribute of each file.
-	 */
-	int set_mode;
-	unsigned int umask;
-
-	/**
-	 * The timeout in seconds for which name lookups will be
-	 * cached.
-	 */
-	double entry_timeout;
-
-	/**
-	 * The timeout in seconds for which a negative lookup will be
-	 * cached. This means, that if file did not exist (lookup
-	 * retuned ENOENT), the lookup will only be redone after the
-	 * timeout, and the file/directory will be assumed to not
-	 * exist until then. A value of zero means that negative
-	 * lookups are not cached.
-	 */
-	double negative_timeout;
-
-	/**
-	 * The timeout in seconds for which file/directory attributes
-	 * (as returned by e.g. the `getattr` handler) are cached.
-	 */
-	double attr_timeout;
-
-	/**
-	 * Allow requests to be interrupted
-	 */
-	int intr;
-
-	/**
-	 * Specify which signal number to send to the filesystem when
-	 * a request is interrupted.  The default is hardcoded to
-	 * USR1.
-	 */
-	int intr_signal;
-
-	/**
-	 * Normally, FUSE assigns inodes to paths only for as long as
-	 * the kernel is aware of them. With this option inodes are
-	 * instead remembered for at least this many seconds.  This
-	 * will require more memory, but may be necessary when using
-	 * applications that make use of inode numbers.
-	 *
-	 * A number of -1 means that inodes will be remembered for the
-	 * entire life-time of the file-system process.
-	 */
-	int remember;
-
-	/**
-	 * The default behavior is that if an open file is deleted,
-	 * the file is renamed to a hidden file (.fuse_hiddenXXX), and
-	 * only removed when the file is finally released.  This
-	 * relieves the filesystem implementation of having to deal
-	 * with this problem. This option disables the hiding
-	 * behavior, and files are removed immediately in an unlink
-	 * operation (or in a rename operation which overwrites an
-	 * existing file).
-	 *
-	 * It is recommended that you not use the hard_remove
-	 * option. When hard_remove is set, the following libc
-	 * functions fail on unlinked files (returning errno of
-	 * ENOENT): read(2), write(2), fsync(2), close(2), f*xattr(2),
-	 * ftruncate(2), fstat(2), fchmod(2), fchown(2)
-	 */
-	int hard_remove;
-
-	/**
-	 * Honor the st_ino field in the functions getattr() and
-	 * fill_dir(). This value is used to fill in the st_ino field
-	 * in the stat(2), lstat(2), fstat(2) functions and the d_ino
-	 * field in the readdir(2) function. The filesystem does not
-	 * have to guarantee uniqueness, however some applications
-	 * rely on this value being unique for the whole filesystem.
-	 *
-	 * Note that this does *not* affect the inode that libfuse 
-	 * and the kernel use internally (also called the "nodeid").
-	 */
-	int use_ino;
-
-	/**
-	 * If use_ino option is not given, still try to fill in the
-	 * d_ino field in readdir(2). If the name was previously
-	 * looked up, and is still in the cache, the inode number
-	 * found there will be used.  Otherwise it will be set to -1.
-	 * If use_ino option is given, this option is ignored.
-	 */
-	int readdir_ino;
-
-	/**
-	 * This option disables the use of page cache (file content cache)
-	 * in the kernel for this filesystem. This has several affects:
-	 *
-	 * 1. Each read(2) or write(2) system call will initiate one
-	 *    or more read or write operations, data will not be
-	 *    cached in the kernel.
-	 *
-	 * 2. The return value of the read() and write() system calls
-	 *    will correspond to the return values of the read and
-	 *    write operations. This is useful for example if the
-	 *    file size is not known in advance (before reading it).
-	 *
-	 * Internally, enabling this option causes fuse to set the
-	 * `direct_io` field of `struct fuse_file_info` - overwriting
-	 * any value that was put there by the file system.
-	 */
-	int direct_io;
-
-	/**
-	 * This option disables flushing the cache of the file
-	 * contents on every open(2).  This should only be enabled on
-	 * filesystems where the file data is never changed
-	 * externally (not through the mounted FUSE filesystem).  Thus
-	 * it is not suitable for network filesystems and other
-	 * intermediate filesystems.
-	 *
-	 * NOTE: if this option is not specified (and neither
-	 * direct_io) data is still cached after the open(2), so a
-	 * read(2) system call will not always initiate a read
-	 * operation.
-	 *
-	 * Internally, enabling this option causes fuse to set the
-	 * `keep_cache` field of `struct fuse_file_info` - overwriting
-	 * any value that was put there by the file system.
-	 */
-	int kernel_cache;
-
-	/**
-	 * This option is an alternative to `kernel_cache`. Instead of
-	 * unconditionally keeping cached data, the cached data is
-	 * invalidated on open(2) if if the modification time or the
-	 * size of the file has changed since it was last opened.
-	 */
-	int auto_cache;
-
-	/**
-	 * The timeout in seconds for which file attributes are cached
-	 * for the purpose of checking if auto_cache should flush the
-	 * file data on open.
-	 */
-	int ac_attr_timeout_set;
-	double ac_attr_timeout;
-
-	/**
-	 * If this option is given the file-system handlers for the
-	 * following operations will not receive path information:
-	 * read, write, flush, release, fsync, readdir, releasedir,
-	 * fsyncdir, lock, ioctl and poll.
-	 *
-	 * For the truncate, getattr, chmod, chown and utimens
-	 * operations the path will be provided only if the struct
-	 * fuse_file_info argument is NULL.
-	 */
-	int nullpath_ok;
-
-	/**
-	 * The remaining options are used by libfuse internally and
-	 * should not be touched.
-	 */
-	int show_help;
-	char *modules;
-	int debug;
+    /**
+     * If `set_gid` is non-zero, the st_gid attribute of each file
+     * is overwritten with the value of `gid`.
+     */
+    int set_gid;
+    unsigned int gid;
+
+    /**
+     * If `set_uid` is non-zero, the st_uid attribute of each file
+     * is overwritten with the value of `uid`.
+     */
+    int set_uid;
+    unsigned int uid;
+
+    /**
+     * If `set_mode` is non-zero, the any permissions bits set in
+     * `umask` are unset in the st_mode attribute of each file.
+     */
+    int set_mode;
+    unsigned int umask;
+
+    /**
+     * The timeout in seconds for which name lookups will be
+     * cached.
+     */
+    double entry_timeout;
+
+    /**
+     * The timeout in seconds for which a negative lookup will be
+     * cached. This means, that if file did not exist (lookup
+     * retuned ENOENT), the lookup will only be redone after the
+     * timeout, and the file/directory will be assumed to not
+     * exist until then. A value of zero means that negative
+     * lookups are not cached.
+     */
+    double negative_timeout;
+
+    /**
+     * The timeout in seconds for which file/directory attributes
+     * (as returned by e.g. the `getattr` handler) are cached.
+     */
+    double attr_timeout;
+
+    /**
+     * Allow requests to be interrupted
+     */
+    int intr;
+
+    /**
+     * Specify which signal number to send to the filesystem when
+     * a request is interrupted.  The default is hardcoded to
+     * USR1.
+     */
+    int intr_signal;
+
+    /**
+     * Normally, FUSE assigns inodes to paths only for as long as
+     * the kernel is aware of them. With this option inodes are
+     * instead remembered for at least this many seconds.  This
+     * will require more memory, but may be necessary when using
+     * applications that make use of inode numbers.
+     *
+     * A number of -1 means that inodes will be remembered for the
+     * entire life-time of the file-system process.
+     */
+    int remember;
+
+    /**
+     * The default behavior is that if an open file is deleted,
+     * the file is renamed to a hidden file (.fuse_hiddenXXX), and
+     * only removed when the file is finally released.  This
+     * relieves the filesystem implementation of having to deal
+     * with this problem. This option disables the hiding
+     * behavior, and files are removed immediately in an unlink
+     * operation (or in a rename operation which overwrites an
+     * existing file).
+     *
+     * It is recommended that you not use the hard_remove
+     * option. When hard_remove is set, the following libc
+     * functions fail on unlinked files (returning errno of
+     * ENOENT): read(2), write(2), fsync(2), close(2), f*xattr(2),
+     * ftruncate(2), fstat(2), fchmod(2), fchown(2)
+     */
+    int hard_remove;
+
+    /**
+     * Honor the st_ino field in the functions getattr() and
+     * fill_dir(). This value is used to fill in the st_ino field
+     * in the stat(2), lstat(2), fstat(2) functions and the d_ino
+     * field in the readdir(2) function. The filesystem does not
+     * have to guarantee uniqueness, however some applications
+     * rely on this value being unique for the whole filesystem.
+     *
+     * Note that this does *not* affect the inode that libfuse
+     * and the kernel use internally (also called the "nodeid").
+     */
+    int use_ino;
+
+    /**
+     * If use_ino option is not given, still try to fill in the
+     * d_ino field in readdir(2). If the name was previously
+     * looked up, and is still in the cache, the inode number
+     * found there will be used.  Otherwise it will be set to -1.
+     * If use_ino option is given, this option is ignored.
+     */
+    int readdir_ino;
+
+    /**
+     * This option disables the use of page cache (file content cache)
+     * in the kernel for this filesystem. This has several affects:
+     *
+     * 1. Each read(2) or write(2) system call will initiate one
+     *    or more read or write operations, data will not be
+     *    cached in the kernel.
+     *
+     * 2. The return value of the read() and write() system calls
+     *    will correspond to the return values of the read and
+     *    write operations. This is useful for example if the
+     *    file size is not known in advance (before reading it).
+     *
+     * Internally, enabling this option causes fuse to set the
+     * `direct_io` field of `struct fuse_file_info` - overwriting
+     * any value that was put there by the file system.
+     */
+    int direct_io;
+
+    /**
+     * This option disables flushing the cache of the file
+     * contents on every open(2).  This should only be enabled on
+     * filesystems where the file data is never changed
+     * externally (not through the mounted FUSE filesystem).  Thus
+     * it is not suitable for network filesystems and other
+     * intermediate filesystems.
+     *
+     * NOTE: if this option is not specified (and neither
+     * direct_io) data is still cached after the open(2), so a
+     * read(2) system call will not always initiate a read
+     * operation.
+     *
+     * Internally, enabling this option causes fuse to set the
+     * `keep_cache` field of `struct fuse_file_info` - overwriting
+     * any value that was put there by the file system.
+     */
+    int kernel_cache;
+
+    /**
+     * This option is an alternative to `kernel_cache`. Instead of
+     * unconditionally keeping cached data, the cached data is
+     * invalidated on open(2) if if the modification time or the
+     * size of the file has changed since it was last opened.
+     */
+    int auto_cache;
+
+    /**
+     * The timeout in seconds for which file attributes are cached
+     * for the purpose of checking if auto_cache should flush the
+     * file data on open.
+     */
+    int ac_attr_timeout_set;
+    double ac_attr_timeout;
+
+    /**
+     * If this option is given the file-system handlers for the
+     * following operations will not receive path information:
+     * read, write, flush, release, fsync, readdir, releasedir,
+     * fsyncdir, lock, ioctl and poll.
+     *
+     * For the truncate, getattr, chmod, chown and utimens
+     * operations the path will be provided only if the struct
+     * fuse_file_info argument is NULL.
+     */
+    int nullpath_ok;
+
+    /**
+     * The remaining options are used by libfuse internally and
+     * should not be touched.
+     */
+    int show_help;
+    char *modules;
+    int debug;
 };
 
 
@@ -293,515 +294,535 @@ struct fuse_config {
  * Almost all operations take a path which can be of any length.
  */
 struct fuse_operations {
-	/** Get file attributes.
-	 *
-	 * Similar to stat().  The 'st_dev' and 'st_blksize' fields are
-	 * ignored. The 'st_ino' field is ignored except if the 'use_ino'
-	 * mount option is given. In that case it is passed to userspace,
-	 * but libfuse and the kernel will still assign a different
-	 * inode for internal use (called the "nodeid").
-	 *
-	 * `fi` will always be NULL if the file is not currently open, but
-	 * may also be NULL if the file is open.
-	 */
-	int (*getattr) (const char *, struct stat *, struct fuse_file_info *fi);
-
-	/** Read the target of a symbolic link
-	 *
-	 * The buffer should be filled with a null terminated string.  The
-	 * buffer size argument includes the space for the terminating
-	 * null character.	If the linkname is too long to fit in the
-	 * buffer, it should be truncated.	The return value should be 0
-	 * for success.
-	 */
-	int (*readlink) (const char *, char *, size_t);
-
-	/** Create a file node
-	 *
-	 * This is called for creation of all non-directory, non-symlink
-	 * nodes.  If the filesystem defines a create() method, then for
-	 * regular files that will be called instead.
-	 */
-	int (*mknod) (const char *, mode_t, dev_t);
-
-	/** Create a directory
-	 *
-	 * Note that the mode argument may not have the type specification
-	 * bits set, i.e. S_ISDIR(mode) can be false.  To obtain the
-	 * correct directory type bits use  mode|S_IFDIR
-	 * */
-	int (*mkdir) (const char *, mode_t);
-
-	/** Remove a file */
-	int (*unlink) (const char *);
-
-	/** Remove a directory */
-	int (*rmdir) (const char *);
-
-	/** Create a symbolic link */
-	int (*symlink) (const char *, const char *);
-
-	/** Rename a file
-	 *
-	 * *flags* may be `RENAME_EXCHANGE` or `RENAME_NOREPLACE`. If
-	 * RENAME_NOREPLACE is specified, the filesystem must not
-	 * overwrite *newname* if it exists and return an error
-	 * instead. If `RENAME_EXCHANGE` is specified, the filesystem
-	 * must atomically exchange the two files, i.e. both must
-	 * exist and neither may be deleted.
-	 */
-	int (*rename) (const char *, const char *, unsigned int flags);
-
-	/** Create a hard link to a file */
-	int (*link) (const char *, const char *);
-
-	/** Change the permission bits of a file
-	 *
-	 * `fi` will always be NULL if the file is not currenlty open, but
-	 * may also be NULL if the file is open.
-	 */
-	int (*chmod) (const char *, mode_t, struct fuse_file_info *fi);
-
-	/** Change the owner and group of a file
-	 *
-	 * `fi` will always be NULL if the file is not currenlty open, but
-	 * may also be NULL if the file is open.
-	 *
-	 * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
-	 * expected to reset the setuid and setgid bits.
-	 */
-	int (*chown) (const char *, uid_t, gid_t, struct fuse_file_info *fi);
-
-	/** Change the size of a file
-	 *
-	 * `fi` will always be NULL if the file is not currenlty open, but
-	 * may also be NULL if the file is open.
-	 *
-	 * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
-	 * expected to reset the setuid and setgid bits.
-	 */
-	int (*truncate) (const char *, off_t, struct fuse_file_info *fi);
-
-	/** Open a file
-	 *
-	 * Open flags are available in fi->flags. The following rules
-	 * apply.
-	 *
-	 *  - Creation (O_CREAT, O_EXCL, O_NOCTTY) flags will be
-	 *    filtered out / handled by the kernel.
-	 *
-	 *  - Access modes (O_RDONLY, O_WRONLY, O_RDWR, O_EXEC, O_SEARCH)
-	 *    should be used by the filesystem to check if the operation is
-	 *    permitted.  If the ``-o default_permissions`` mount option is
-	 *    given, this check is already done by the kernel before calling
-	 *    open() and may thus be omitted by the filesystem.
-	 *
-	 *  - When writeback caching is enabled, the kernel may send
-	 *    read requests even for files opened with O_WRONLY. The
-	 *    filesystem should be prepared to handle this.
-	 *
-	 *  - When writeback caching is disabled, the filesystem is
-	 *    expected to properly handle the O_APPEND flag and ensure
-	 *    that each write is appending to the end of the file.
-	 * 
-         *  - When writeback caching is enabled, the kernel will
-	 *    handle O_APPEND. However, unless all changes to the file
-	 *    come through the kernel this will not work reliably. The
-	 *    filesystem should thus either ignore the O_APPEND flag
-	 *    (and let the kernel handle it), or return an error
-	 *    (indicating that reliably O_APPEND is not available).
-	 *
-	 * Filesystem may store an arbitrary file handle (pointer,
-	 * index, etc) in fi->fh, and use this in other all other file
-	 * operations (read, write, flush, release, fsync).
-	 *
-	 * Filesystem may also implement stateless file I/O and not store
-	 * anything in fi->fh.
-	 *
-	 * There are also some flags (direct_io, keep_cache) which the
-	 * filesystem may set in fi, to change the way the file is opened.
-	 * See fuse_file_info structure in <fuse_common.h> for more details.
-	 *
-	 * If this request is answered with an error code of ENOSYS
-	 * and FUSE_CAP_NO_OPEN_SUPPORT is set in
-	 * `fuse_conn_info.capable`, this is treated as success and
-	 * future calls to open will also succeed without being send
-	 * to the filesystem process.
-	 *
-	 */
-	int (*open) (const char *, struct fuse_file_info *);
-
-	/** Read data from an open file
-	 *
-	 * Read should return exactly the number of bytes requested except
-	 * on EOF or error, otherwise the rest of the data will be
-	 * substituted with zeroes.	 An exception to this is when the
-	 * 'direct_io' mount option is specified, in which case the return
-	 * value of the read system call will reflect the return value of
-	 * this operation.
-	 */
-	int (*read) (const char *, char *, size_t, off_t,
-		     struct fuse_file_info *);
-
-	/** Write data to an open file
-	 *
-	 * Write should return exactly the number of bytes requested
-	 * except on error.	 An exception to this is when the 'direct_io'
-	 * mount option is specified (see read operation).
-	 *
-	 * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
-	 * expected to reset the setuid and setgid bits.
-	 */
-	int (*write) (const char *, const char *, size_t, off_t,
-		      struct fuse_file_info *);
-
-	/** Get file system statistics
-	 *
-	 * The 'f_favail', 'f_fsid' and 'f_flag' fields are ignored
-	 */
-	int (*statfs) (const char *, struct statvfs *);
-
-	/** Possibly flush cached data
-	 *
-	 * BIG NOTE: This is not equivalent to fsync().  It's not a
-	 * request to sync dirty data.
-	 *
-	 * Flush is called on each close() of a file descriptor, as opposed to
-	 * release which is called on the close of the last file descriptor for
-	 * a file.  Under Linux, errors returned by flush() will be passed to 
-	 * userspace as errors from close(), so flush() is a good place to write
-	 * back any cached dirty data. However, many applications ignore errors 
-	 * on close(), and on non-Linux systems, close() may succeed even if flush()
-	 * returns an error. For these reasons, filesystems should not assume
-	 * that errors returned by flush will ever be noticed or even
-	 * delivered.
-	 *
-	 * NOTE: The flush() method may be called more than once for each
-	 * open().  This happens if more than one file descriptor refers to an
-	 * open file handle, e.g. due to dup(), dup2() or fork() calls.  It is
-	 * not possible to determine if a flush is final, so each flush should
-	 * be treated equally.  Multiple write-flush sequences are relatively
-	 * rare, so this shouldn't be a problem.
-	 *
-	 * Filesystems shouldn't assume that flush will be called at any
-	 * particular point.  It may be called more times than expected, or not
-	 * at all.
-	 *
-	 * [close]: http://pubs.opengroup.org/onlinepubs/9699919799/functions/close.html
-	 */
-	int (*flush) (const char *, struct fuse_file_info *);
-
-	/** Release an open file
-	 *
-	 * Release is called when there are no more references to an open
-	 * file: all file descriptors are closed and all memory mappings
-	 * are unmapped.
-	 *
-	 * For every open() call there will be exactly one release() call
-	 * with the same flags and file handle.  It is possible to
-	 * have a file opened more than once, in which case only the last
-	 * release will mean, that no more reads/writes will happen on the
-	 * file.  The return value of release is ignored.
-	 */
-	int (*release) (const char *, struct fuse_file_info *);
-
-	/** Synchronize file contents
-	 *
-	 * If the datasync parameter is non-zero, then only the user data
-	 * should be flushed, not the meta data.
-	 */
-	int (*fsync) (const char *, int, struct fuse_file_info *);
-
-	/** Set extended attributes */
-	int (*setxattr) (const char *, const char *, const char *, size_t, int);
-
-	/** Get extended attributes */
-	int (*getxattr) (const char *, const char *, char *, size_t);
-
-	/** List extended attributes */
-	int (*listxattr) (const char *, char *, size_t);
-
-	/** Remove extended attributes */
-	int (*removexattr) (const char *, const char *);
-
-	/** Open directory
-	 *
-	 * Unless the 'default_permissions' mount option is given,
-	 * this method should check if opendir is permitted for this
-	 * directory. Optionally opendir may also return an arbitrary
-	 * filehandle in the fuse_file_info structure, which will be
-	 * passed to readdir, releasedir and fsyncdir.
-	 */
-	int (*opendir) (const char *, struct fuse_file_info *);
-
-	/** Read directory
-	 *
-	 * The filesystem may choose between two modes of operation:
-	 *
-	 * 1) The readdir implementation ignores the offset parameter, and
-	 * passes zero to the filler function's offset.  The filler
-	 * function will not return '1' (unless an error happens), so the
-	 * whole directory is read in a single readdir operation.
-	 *
-	 * 2) The readdir implementation keeps track of the offsets of the
-	 * directory entries.  It uses the offset parameter and always
-	 * passes non-zero offset to the filler function.  When the buffer
-	 * is full (or an error happens) the filler function will return
-	 * '1'.
-	 */
-	int (*readdir) (const char *, void *, fuse_fill_dir_t, off_t,
-			struct fuse_file_info *, enum fuse_readdir_flags);
-
-	/** Release directory
-	 */
-	int (*releasedir) (const char *, struct fuse_file_info *);
-
-	/** Synchronize directory contents
-	 *
-	 * If the datasync parameter is non-zero, then only the user data
-	 * should be flushed, not the meta data
-	 */
-	int (*fsyncdir) (const char *, int, struct fuse_file_info *);
-
-	/**
-	 * Initialize filesystem
-	 *
-	 * The return value will passed in the `private_data` field of
-	 * `struct fuse_context` to all file operations, and as a
-	 * parameter to the destroy() method. It overrides the initial
-	 * value provided to fuse_main() / fuse_new().
-	 */
-	void *(*init) (struct fuse_conn_info *conn,
-		       struct fuse_config *cfg);
-
-	/**
-	 * Clean up filesystem
-	 *
-	 * Called on filesystem exit.
-	 */
-	void (*destroy) (void *private_data);
-
-	/**
-	 * Check file access permissions
-	 *
-	 * This will be called for the access() system call.  If the
-	 * 'default_permissions' mount option is given, this method is not
-	 * called.
-	 *
-	 * This method is not called under Linux kernel versions 2.4.x
-	 */
-	int (*access) (const char *, int);
-
-	/**
-	 * Create and open a file
-	 *
-	 * If the file does not exist, first create it with the specified
-	 * mode, and then open it.
-	 *
-	 * If this method is not implemented or under Linux kernel
-	 * versions earlier than 2.6.15, the mknod() and open() methods
-	 * will be called instead.
-	 */
-	int (*create) (const char *, mode_t, struct fuse_file_info *);
-
-	/**
-	 * Perform POSIX file locking operation
-	 *
-	 * The cmd argument will be either F_GETLK, F_SETLK or F_SETLKW.
-	 *
-	 * For the meaning of fields in 'struct flock' see the man page
-	 * for fcntl(2).  The l_whence field will always be set to
-	 * SEEK_SET.
-	 *
-	 * For checking lock ownership, the 'fuse_file_info->owner'
-	 * argument must be used.
-	 *
-	 * For F_GETLK operation, the library will first check currently
-	 * held locks, and if a conflicting lock is found it will return
-	 * information without calling this method.	 This ensures, that
-	 * for local locks the l_pid field is correctly filled in.	The
-	 * results may not be accurate in case of race conditions and in
-	 * the presence of hard links, but it's unlikely that an
-	 * application would rely on accurate GETLK results in these
-	 * cases.  If a conflicting lock is not found, this method will be
-	 * called, and the filesystem may fill out l_pid by a meaningful
-	 * value, or it may leave this field zero.
-	 *
-	 * For F_SETLK and F_SETLKW the l_pid field will be set to the pid
-	 * of the process performing the locking operation.
-	 *
-	 * Note: if this method is not implemented, the kernel will still
-	 * allow file locking to work locally.  Hence it is only
-	 * interesting for network filesystems and similar.
-	 */
-	int (*lock) (const char *, struct fuse_file_info *, int cmd,
-		     struct flock *);
-
-	/**
-	 * Change the access and modification times of a file with
-	 * nanosecond resolution
-	 *
-	 * This supersedes the old utime() interface.  New applications
-	 * should use this.
-	 *
-	 * `fi` will always be NULL if the file is not currenlty open, but
-	 * may also be NULL if the file is open.
-	 *
-	 * See the utimensat(2) man page for details.
-	 */
-	 int (*utimens) (const char *, const struct timespec tv[2],
-			 struct fuse_file_info *fi);
-
-	/**
-	 * Map block index within file to block index within device
-	 *
-	 * Note: This makes sense only for block device backed filesystems
-	 * mounted with the 'blkdev' option
-	 */
-	int (*bmap) (const char *, size_t blocksize, uint64_t *idx);
-
-	/**
-	 * Ioctl
-	 *
-	 * flags will have FUSE_IOCTL_COMPAT set for 32bit ioctls in
-	 * 64bit environment.  The size and direction of data is
-	 * determined by _IOC_*() decoding of cmd.  For _IOC_NONE,
-	 * data will be NULL, for _IOC_WRITE data is out area, for
-	 * _IOC_READ in area and if both are set in/out area.  In all
-	 * non-NULL cases, the area is of _IOC_SIZE(cmd) bytes.
-	 *
-	 * If flags has FUSE_IOCTL_DIR then the fuse_file_info refers to a
-	 * directory file handle.
-	 *
-	 * Note : the unsigned long request submitted by the application
-	 * is truncated to 32 bits.
-	 */
-	int (*ioctl) (const char *, unsigned int cmd, void *arg,
-		      struct fuse_file_info *, unsigned int flags, void *data);
-
-	/**
-	 * Poll for IO readiness events
-	 *
-	 * Note: If ph is non-NULL, the client should notify
-	 * when IO readiness events occur by calling
-	 * fuse_notify_poll() with the specified ph.
-	 *
-	 * Regardless of the number of times poll with a non-NULL ph
-	 * is received, single notification is enough to clear all.
-	 * Notifying more times incurs overhead but doesn't harm
-	 * correctness.
-	 *
-	 * The callee is responsible for destroying ph with
-	 * fuse_pollhandle_destroy() when no longer in use.
-	 */
-	int (*poll) (const char *, struct fuse_file_info *,
-		     struct fuse_pollhandle *ph, unsigned *reventsp);
-
-	/** Write contents of buffer to an open file
-	 *
-	 * Similar to the write() method, but data is supplied in a
-	 * generic buffer.  Use fuse_buf_copy() to transfer data to
-	 * the destination.
-	 *
-	 * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
-	 * expected to reset the setuid and setgid bits.
-	 */
-	int (*write_buf) (const char *, struct fuse_bufvec *buf, off_t off,
-			  struct fuse_file_info *);
-
-	/** Store data from an open file in a buffer
-	 *
-	 * Similar to the read() method, but data is stored and
-	 * returned in a generic buffer.
-	 *
-	 * No actual copying of data has to take place, the source
-	 * file descriptor may simply be stored in the buffer for
-	 * later data transfer.
-	 *
-	 * The buffer must be allocated dynamically and stored at the
-	 * location pointed to by bufp.  If the buffer contains memory
-	 * regions, they too must be allocated using malloc().  The
-	 * allocated memory will be freed by the caller.
-	 */
-	int (*read_buf) (const char *, struct fuse_bufvec **bufp,
-			 size_t size, off_t off, struct fuse_file_info *);
-	/**
-	 * Perform BSD file locking operation
-	 *
-	 * The op argument will be either LOCK_SH, LOCK_EX or LOCK_UN
-	 *
-	 * Nonblocking requests will be indicated by ORing LOCK_NB to
-	 * the above operations
-	 *
-	 * For more information see the flock(2) manual page.
-	 *
-	 * Additionally fi->owner will be set to a value unique to
-	 * this open file.  This same value will be supplied to
-	 * ->release() when the file is released.
-	 *
-	 * Note: if this method is not implemented, the kernel will still
-	 * allow file locking to work locally.  Hence it is only
-	 * interesting for network filesystems and similar.
-	 */
-	int (*flock) (const char *, struct fuse_file_info *, int op);
-
-	/**
-	 * Allocates space for an open file
-	 *
-	 * This function ensures that required space is allocated for specified
-	 * file.  If this function returns success then any subsequent write
-	 * request to specified range is guaranteed not to fail because of lack
-	 * of space on the file system media.
-	 */
-	int (*fallocate) (const char *, int, off_t, off_t,
-			  struct fuse_file_info *);
-
-	/**
-	 * Copy a range of data from one file to another
-	 *
-	 * Performs an optimized copy between two file descriptors without the
-	 * additional cost of transferring data through the FUSE kernel module
-	 * to user space (glibc) and then back into the FUSE filesystem again.
-	 *
-	 * In case this method is not implemented, glibc falls back to reading
-	 * data from the source and writing to the destination. Effectively
-	 * doing an inefficient copy of the data.
-	 */
-	ssize_t (*copy_file_range) (const char *path_in,
-				    struct fuse_file_info *fi_in,
-				    off_t offset_in, const char *path_out,
-				    struct fuse_file_info *fi_out,
-				    off_t offset_out, size_t size, int flags);
-
-	/**
-	 * Find next data or hole after the specified offset
-	 */
-	off_t (*lseek) (const char *, off_t off, int whence, struct fuse_file_info *);
+    /**
+     * Get file attributes.
+     *
+     * Similar to stat().  The 'st_dev' and 'st_blksize' fields are
+     * ignored. The 'st_ino' field is ignored except if the 'use_ino'
+     * mount option is given. In that case it is passed to userspace,
+     * but libfuse and the kernel will still assign a different
+     * inode for internal use (called the "nodeid").
+     *
+     * `fi` will always be NULL if the file is not currently open, but
+     * may also be NULL if the file is open.
+     */
+    int (*getattr)(const char *, struct stat *, struct fuse_file_info *fi);
+
+    /**
+     * Read the target of a symbolic link
+     *
+     * The buffer should be filled with a null terminated string.  The
+     * buffer size argument includes the space for the terminating
+     * null character. If the linkname is too long to fit in the
+     * buffer, it should be truncated. The return value should be 0
+     * for success.
+     */
+    int (*readlink)(const char *, char *, size_t);
+
+    /**
+     * Create a file node
+     *
+     * This is called for creation of all non-directory, non-symlink
+     * nodes.  If the filesystem defines a create() method, then for
+     * regular files that will be called instead.
+     */
+    int (*mknod)(const char *, mode_t, dev_t);
+
+    /**
+     * Create a directory
+     *
+     * Note that the mode argument may not have the type specification
+     * bits set, i.e. S_ISDIR(mode) can be false.  To obtain the
+     * correct directory type bits use  mode|S_IFDIR
+     */
+    int (*mkdir)(const char *, mode_t);
+
+    /** Remove a file */
+    int (*unlink)(const char *);
+
+    /** Remove a directory */
+    int (*rmdir)(const char *);
+
+    /** Create a symbolic link */
+    int (*symlink)(const char *, const char *);
+
+    /**
+     * Rename a file
+     *
+     * *flags* may be `RENAME_EXCHANGE` or `RENAME_NOREPLACE`. If
+     * RENAME_NOREPLACE is specified, the filesystem must not
+     * overwrite *newname* if it exists and return an error
+     * instead. If `RENAME_EXCHANGE` is specified, the filesystem
+     * must atomically exchange the two files, i.e. both must
+     * exist and neither may be deleted.
+     */
+    int (*rename)(const char *, const char *, unsigned int flags);
+
+    /** Create a hard link to a file */
+    int (*link)(const char *, const char *);
+
+    /**
+     * Change the permission bits of a file
+     *
+     * `fi` will always be NULL if the file is not currenlty open, but
+     * may also be NULL if the file is open.
+     */
+    int (*chmod)(const char *, mode_t, struct fuse_file_info *fi);
+
+    /**
+     * Change the owner and group of a file
+     *
+     * `fi` will always be NULL if the file is not currenlty open, but
+     * may also be NULL if the file is open.
+     *
+     * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
+     * expected to reset the setuid and setgid bits.
+     */
+    int (*chown)(const char *, uid_t, gid_t, struct fuse_file_info *fi);
+
+    /**
+     * Change the size of a file
+     *
+     * `fi` will always be NULL if the file is not currenlty open, but
+     * may also be NULL if the file is open.
+     *
+     * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
+     * expected to reset the setuid and setgid bits.
+     */
+    int (*truncate)(const char *, off_t, struct fuse_file_info *fi);
+
+    /**
+     * Open a file
+     *
+     * Open flags are available in fi->flags. The following rules
+     * apply.
+     *
+     *  - Creation (O_CREAT, O_EXCL, O_NOCTTY) flags will be
+     *    filtered out / handled by the kernel.
+     *
+     *  - Access modes (O_RDONLY, O_WRONLY, O_RDWR, O_EXEC, O_SEARCH)
+     *    should be used by the filesystem to check if the operation is
+     *    permitted.  If the ``-o default_permissions`` mount option is
+     *    given, this check is already done by the kernel before calling
+     *    open() and may thus be omitted by the filesystem.
+     *
+     *  - When writeback caching is enabled, the kernel may send
+     *    read requests even for files opened with O_WRONLY. The
+     *    filesystem should be prepared to handle this.
+     *
+     *  - When writeback caching is disabled, the filesystem is
+     *    expected to properly handle the O_APPEND flag and ensure
+     *    that each write is appending to the end of the file.
+     *
+     *  - When writeback caching is enabled, the kernel will
+     *    handle O_APPEND. However, unless all changes to the file
+     *    come through the kernel this will not work reliably. The
+     *    filesystem should thus either ignore the O_APPEND flag
+     *    (and let the kernel handle it), or return an error
+     *    (indicating that reliably O_APPEND is not available).
+     *
+     * Filesystem may store an arbitrary file handle (pointer,
+     * index, etc) in fi->fh, and use this in other all other file
+     * operations (read, write, flush, release, fsync).
+     *
+     * Filesystem may also implement stateless file I/O and not store
+     * anything in fi->fh.
+     *
+     * There are also some flags (direct_io, keep_cache) which the
+     * filesystem may set in fi, to change the way the file is opened.
+     * See fuse_file_info structure in <fuse_common.h> for more details.
+     *
+     * If this request is answered with an error code of ENOSYS
+     * and FUSE_CAP_NO_OPEN_SUPPORT is set in
+     * `fuse_conn_info.capable`, this is treated as success and
+     * future calls to open will also succeed without being send
+     * to the filesystem process.
+     *
+     */
+    int (*open)(const char *, struct fuse_file_info *);
+
+    /**
+     * Read data from an open file
+     *
+     * Read should return exactly the number of bytes requested except
+     * on EOF or error, otherwise the rest of the data will be
+     * substituted with zeroes.  An exception to this is when the
+     * 'direct_io' mount option is specified, in which case the return
+     * value of the read system call will reflect the return value of
+     * this operation.
+     */
+    int (*read)(const char *, char *, size_t, off_t, struct fuse_file_info *);
+
+    /**
+     * Write data to an open file
+     *
+     * Write should return exactly the number of bytes requested
+     * except on error.  An exception to this is when the 'direct_io'
+     * mount option is specified (see read operation).
+     *
+     * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
+     * expected to reset the setuid and setgid bits.
+     */
+    int (*write)(const char *, const char *, size_t, off_t,
+                 struct fuse_file_info *);
+
+    /**
+     * Get file system statistics
+     *
+     * The 'f_favail', 'f_fsid' and 'f_flag' fields are ignored
+     */
+    int (*statfs)(const char *, struct statvfs *);
+
+    /**
+     * Possibly flush cached data
+     *
+     * BIG NOTE: This is not equivalent to fsync().  It's not a
+     * request to sync dirty data.
+     *
+     * Flush is called on each close() of a file descriptor, as opposed to
+     * release which is called on the close of the last file descriptor for
+     * a file.  Under Linux, errors returned by flush() will be passed to
+     * userspace as errors from close(), so flush() is a good place to write
+     * back any cached dirty data. However, many applications ignore errors
+     * on close(), and on non-Linux systems, close() may succeed even if flush()
+     * returns an error. For these reasons, filesystems should not assume
+     * that errors returned by flush will ever be noticed or even
+     * delivered.
+     *
+     * NOTE: The flush() method may be called more than once for each
+     * open().  This happens if more than one file descriptor refers to an
+     * open file handle, e.g. due to dup(), dup2() or fork() calls.  It is
+     * not possible to determine if a flush is final, so each flush should
+     * be treated equally.  Multiple write-flush sequences are relatively
+     * rare, so this shouldn't be a problem.
+     *
+     * Filesystems shouldn't assume that flush will be called at any
+     * particular point.  It may be called more times than expected, or not
+     * at all.
+     *
+     * [close]:
+     * http://pubs.opengroup.org/onlinepubs/9699919799/functions/close.html
+     */
+    int (*flush)(const char *, struct fuse_file_info *);
+
+    /**
+     * Release an open file
+     *
+     * Release is called when there are no more references to an open
+     * file: all file descriptors are closed and all memory mappings
+     * are unmapped.
+     *
+     * For every open() call there will be exactly one release() call
+     * with the same flags and file handle.  It is possible to
+     * have a file opened more than once, in which case only the last
+     * release will mean, that no more reads/writes will happen on the
+     * file.  The return value of release is ignored.
+     */
+    int (*release)(const char *, struct fuse_file_info *);
+
+    /*
+     * Synchronize file contents
+     *
+     * If the datasync parameter is non-zero, then only the user data
+     * should be flushed, not the meta data.
+     */
+    int (*fsync)(const char *, int, struct fuse_file_info *);
+
+    /** Set extended attributes */
+    int (*setxattr)(const char *, const char *, const char *, size_t, int);
+
+    /** Get extended attributes */
+    int (*getxattr)(const char *, const char *, char *, size_t);
+
+    /** List extended attributes */
+    int (*listxattr)(const char *, char *, size_t);
+
+    /** Remove extended attributes */
+    int (*removexattr)(const char *, const char *);
+
+    /*
+     * Open directory
+     *
+     * Unless the 'default_permissions' mount option is given,
+     * this method should check if opendir is permitted for this
+     * directory. Optionally opendir may also return an arbitrary
+     * filehandle in the fuse_file_info structure, which will be
+     * passed to readdir, releasedir and fsyncdir.
+     */
+    int (*opendir)(const char *, struct fuse_file_info *);
+
+    /*
+     * Read directory
+     *
+     * The filesystem may choose between two modes of operation:
+     *
+     * 1) The readdir implementation ignores the offset parameter, and
+     * passes zero to the filler function's offset.  The filler
+     * function will not return '1' (unless an error happens), so the
+     * whole directory is read in a single readdir operation.
+     *
+     * 2) The readdir implementation keeps track of the offsets of the
+     * directory entries.  It uses the offset parameter and always
+     * passes non-zero offset to the filler function.  When the buffer
+     * is full (or an error happens) the filler function will return
+     * '1'.
+     */
+    int (*readdir)(const char *, void *, fuse_fill_dir_t, off_t,
+                   struct fuse_file_info *, enum fuse_readdir_flags);
+
+    /**
+     *  Release directory
+     */
+    int (*releasedir)(const char *, struct fuse_file_info *);
+
+    /**
+     * Synchronize directory contents
+     *
+     * If the datasync parameter is non-zero, then only the user data
+     * should be flushed, not the meta data
+     */
+    int (*fsyncdir)(const char *, int, struct fuse_file_info *);
+
+    /**
+     * Initialize filesystem
+     *
+     * The return value will passed in the `private_data` field of
+     * `struct fuse_context` to all file operations, and as a
+     * parameter to the destroy() method. It overrides the initial
+     * value provided to fuse_main() / fuse_new().
+     */
+    void *(*init)(struct fuse_conn_info *conn, struct fuse_config *cfg);
+
+    /**
+     * Clean up filesystem
+     *
+     * Called on filesystem exit.
+     */
+    void (*destroy)(void *private_data);
+
+    /**
+     * Check file access permissions
+     *
+     * This will be called for the access() system call.  If the
+     * 'default_permissions' mount option is given, this method is not
+     * called.
+     *
+     * This method is not called under Linux kernel versions 2.4.x
+     */
+    int (*access)(const char *, int);
+
+    /**
+     * Create and open a file
+     *
+     * If the file does not exist, first create it with the specified
+     * mode, and then open it.
+     *
+     * If this method is not implemented or under Linux kernel
+     * versions earlier than 2.6.15, the mknod() and open() methods
+     * will be called instead.
+     */
+    int (*create)(const char *, mode_t, struct fuse_file_info *);
+
+    /**
+     * Perform POSIX file locking operation
+     *
+     * The cmd argument will be either F_GETLK, F_SETLK or F_SETLKW.
+     *
+     * For the meaning of fields in 'struct flock' see the man page
+     * for fcntl(2).  The l_whence field will always be set to
+     * SEEK_SET.
+     *
+     * For checking lock ownership, the 'fuse_file_info->owner'
+     * argument must be used.
+     *
+     * For F_GETLK operation, the library will first check currently
+     * held locks, and if a conflicting lock is found it will return
+     * information without calling this method.  This ensures, that
+     * for local locks the l_pid field is correctly filled in. The
+     * results may not be accurate in case of race conditions and in
+     * the presence of hard links, but it's unlikely that an
+     * application would rely on accurate GETLK results in these
+     * cases.  If a conflicting lock is not found, this method will be
+     * called, and the filesystem may fill out l_pid by a meaningful
+     * value, or it may leave this field zero.
+     *
+     * For F_SETLK and F_SETLKW the l_pid field will be set to the pid
+     * of the process performing the locking operation.
+     *
+     * Note: if this method is not implemented, the kernel will still
+     * allow file locking to work locally.  Hence it is only
+     * interesting for network filesystems and similar.
+     */
+    int (*lock)(const char *, struct fuse_file_info *, int cmd, struct flock *);
+
+    /**
+     * Change the access and modification times of a file with
+     * nanosecond resolution
+     *
+     * This supersedes the old utime() interface.  New applications
+     * should use this.
+     *
+     * `fi` will always be NULL if the file is not currenlty open, but
+     * may also be NULL if the file is open.
+     *
+     * See the utimensat(2) man page for details.
+     */
+    int (*utimens)(const char *, const struct timespec tv[2],
+                   struct fuse_file_info *fi);
+
+    /**
+     * Map block index within file to block index within device
+     *
+     * Note: This makes sense only for block device backed filesystems
+     * mounted with the 'blkdev' option
+     */
+    int (*bmap)(const char *, size_t blocksize, uint64_t *idx);
+
+    /**
+     * Ioctl
+     *
+     * flags will have FUSE_IOCTL_COMPAT set for 32bit ioctls in
+     * 64bit environment.  The size and direction of data is
+     * determined by _IOC_*() decoding of cmd.  For _IOC_NONE,
+     * data will be NULL, for _IOC_WRITE data is out area, for
+     * _IOC_READ in area and if both are set in/out area.  In all
+     * non-NULL cases, the area is of _IOC_SIZE(cmd) bytes.
+     *
+     * If flags has FUSE_IOCTL_DIR then the fuse_file_info refers to a
+     * directory file handle.
+     *
+     * Note : the unsigned long request submitted by the application
+     * is truncated to 32 bits.
+     */
+    int (*ioctl)(const char *, unsigned int cmd, void *arg,
+                 struct fuse_file_info *, unsigned int flags, void *data);
+
+    /**
+     * Poll for IO readiness events
+     *
+     * Note: If ph is non-NULL, the client should notify
+     * when IO readiness events occur by calling
+     * fuse_notify_poll() with the specified ph.
+     *
+     * Regardless of the number of times poll with a non-NULL ph
+     * is received, single notification is enough to clear all.
+     * Notifying more times incurs overhead but doesn't harm
+     * correctness.
+     *
+     * The callee is responsible for destroying ph with
+     * fuse_pollhandle_destroy() when no longer in use.
+     */
+    int (*poll)(const char *, struct fuse_file_info *,
+                struct fuse_pollhandle *ph, unsigned *reventsp);
+
+    /*
+     * Write contents of buffer to an open file
+     *
+     * Similar to the write() method, but data is supplied in a
+     * generic buffer.  Use fuse_buf_copy() to transfer data to
+     * the destination.
+     *
+     * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
+     * expected to reset the setuid and setgid bits.
+     */
+    int (*write_buf)(const char *, struct fuse_bufvec *buf, off_t off,
+                     struct fuse_file_info *);
+
+    /*
+     *  Store data from an open file in a buffer
+     *
+     * Similar to the read() method, but data is stored and
+     * returned in a generic buffer.
+     *
+     * No actual copying of data has to take place, the source
+     * file descriptor may simply be stored in the buffer for
+     * later data transfer.
+     *
+     * The buffer must be allocated dynamically and stored at the
+     * location pointed to by bufp.  If the buffer contains memory
+     * regions, they too must be allocated using malloc().  The
+     * allocated memory will be freed by the caller.
+     */
+    int (*read_buf)(const char *, struct fuse_bufvec **bufp, size_t size,
+                    off_t off, struct fuse_file_info *);
+    /**
+     * Perform BSD file locking operation
+     *
+     * The op argument will be either LOCK_SH, LOCK_EX or LOCK_UN
+     *
+     * Nonblocking requests will be indicated by ORing LOCK_NB to
+     * the above operations
+     *
+     * For more information see the flock(2) manual page.
+     *
+     * Additionally fi->owner will be set to a value unique to
+     * this open file.  This same value will be supplied to
+     * ->release() when the file is released.
+     *
+     * Note: if this method is not implemented, the kernel will still
+     * allow file locking to work locally.  Hence it is only
+     * interesting for network filesystems and similar.
+     */
+    int (*flock)(const char *, struct fuse_file_info *, int op);
+
+    /**
+     * Allocates space for an open file
+     *
+     * This function ensures that required space is allocated for specified
+     * file.  If this function returns success then any subsequent write
+     * request to specified range is guaranteed not to fail because of lack
+     * of space on the file system media.
+     */
+    int (*fallocate)(const char *, int, off_t, off_t, struct fuse_file_info *);
+
+    /**
+     * Copy a range of data from one file to another
+     *
+     * Performs an optimized copy between two file descriptors without the
+     * additional cost of transferring data through the FUSE kernel module
+     * to user space (glibc) and then back into the FUSE filesystem again.
+     *
+     * In case this method is not implemented, glibc falls back to reading
+     * data from the source and writing to the destination. Effectively
+     * doing an inefficient copy of the data.
+     */
+    ssize_t (*copy_file_range)(const char *path_in,
+                               struct fuse_file_info *fi_in, off_t offset_in,
+                               const char *path_out,
+                               struct fuse_file_info *fi_out, off_t offset_out,
+                               size_t size, int flags);
+
+    /**
+     * Find next data or hole after the specified offset
+     */
+    off_t (*lseek)(const char *, off_t off, int whence,
+                   struct fuse_file_info *);
 };
 
-/** Extra context that may be needed by some filesystems
+/*
+ * Extra context that may be needed by some filesystems
  *
  * The uid, gid and pid fields are not filled in case of a writepage
  * operation.
  */
 struct fuse_context {
-	/** Pointer to the fuse object */
-	struct fuse *fuse;
+    /** Pointer to the fuse object */
+    struct fuse *fuse;
 
-	/** User ID of the calling process */
-	uid_t uid;
+    /** User ID of the calling process */
+    uid_t uid;
 
-	/** Group ID of the calling process */
-	gid_t gid;
+    /** Group ID of the calling process */
+    gid_t gid;
 
-	/** Process ID of the calling thread */
-	pid_t pid;
+    /** Process ID of the calling thread */
+    pid_t pid;
 
-	/** Private filesystem data */
-	void *private_data;
+    /** Private filesystem data */
+    void *private_data;
 
-	/** Umask of the calling process */
-	mode_t umask;
+    /** Umask of the calling process */
+    mode_t umask;
 };
 
 /**
@@ -859,15 +880,15 @@ struct fuse_context {
  * Example usage, see hello.c
  */
 /*
-  int fuse_main(int argc, char *argv[], const struct fuse_operations *op,
-  void *private_data);
-*/
-#define fuse_main(argc, argv, op, private_data)				\
-	fuse_main_real(argc, argv, op, sizeof(*(op)), private_data)
+ * int fuse_main(int argc, char *argv[], const struct fuse_operations *op,
+ * void *private_data);
+ */
+#define fuse_main(argc, argv, op, private_data) \
+    fuse_main_real(argc, argv, op, sizeof(*(op)), private_data)
 
-/* ----------------------------------------------------------- *
- * More detailed API					       *
- * ----------------------------------------------------------- */
+/*
+ * More detailed API
+ */
 
 /**
  * Print available options (high- and low-level) to stdout.  This is
@@ -910,12 +931,13 @@ void fuse_lib_help(struct fuse_args *args);
  * @return the created FUSE handle
  */
 #if FUSE_USE_VERSION == 30
-struct fuse *fuse_new_30(struct fuse_args *args, const struct fuse_operations *op,
-			 size_t op_size, void *private_data);
+struct fuse *fuse_new_30(struct fuse_args *args,
+                         const struct fuse_operations *op, size_t op_size,
+                         void *private_data);
 #define fuse_new(args, op, size, data) fuse_new_30(args, op, size, data)
 #else
 struct fuse *fuse_new(struct fuse_args *args, const struct fuse_operations *op,
-		      size_t op_size, void *private_data);
+                      size_t op_size, void *private_data);
 #endif
 
 /**
@@ -940,7 +962,7 @@ void fuse_unmount(struct fuse *f);
 /**
  * Destroy the FUSE handle.
  *
- * NOTE: This function does not unmount the filesystem.	 If this is
+ * NOTE: This function does not unmount the filesystem.  If this is
  * needed, call fuse_unmount() before calling this function.
  *
  * @param f the FUSE handle
@@ -1030,7 +1052,7 @@ int fuse_invalidate_path(struct fuse *f, const char *path);
  * Do not call this directly, use fuse_main()
  */
 int fuse_main_real(int argc, char *argv[], const struct fuse_operations *op,
-		   size_t op_size, void *private_data);
+                   size_t op_size, void *private_data);
 
 /**
  * Start the cleanup thread when using option "remember".
@@ -1081,89 +1103,87 @@ struct fuse_fs;
  */
 
 int fuse_fs_getattr(struct fuse_fs *fs, const char *path, struct stat *buf,
-		    struct fuse_file_info *fi);
-int fuse_fs_rename(struct fuse_fs *fs, const char *oldpath,
-		   const char *newpath, unsigned int flags);
+                    struct fuse_file_info *fi);
+int fuse_fs_rename(struct fuse_fs *fs, const char *oldpath, const char *newpath,
+                   unsigned int flags);
 int fuse_fs_unlink(struct fuse_fs *fs, const char *path);
 int fuse_fs_rmdir(struct fuse_fs *fs, const char *path);
-int fuse_fs_symlink(struct fuse_fs *fs, const char *linkname,
-		    const char *path);
+int fuse_fs_symlink(struct fuse_fs *fs, const char *linkname, const char *path);
 int fuse_fs_link(struct fuse_fs *fs, const char *oldpath, const char *newpath);
-int fuse_fs_release(struct fuse_fs *fs,	 const char *path,
-		    struct fuse_file_info *fi);
+int fuse_fs_release(struct fuse_fs *fs, const char *path,
+                    struct fuse_file_info *fi);
 int fuse_fs_open(struct fuse_fs *fs, const char *path,
-		 struct fuse_file_info *fi);
+                 struct fuse_file_info *fi);
 int fuse_fs_read(struct fuse_fs *fs, const char *path, char *buf, size_t size,
-		 off_t off, struct fuse_file_info *fi);
+                 off_t off, struct fuse_file_info *fi);
 int fuse_fs_read_buf(struct fuse_fs *fs, const char *path,
-		     struct fuse_bufvec **bufp, size_t size, off_t off,
-		     struct fuse_file_info *fi);
+                     struct fuse_bufvec **bufp, size_t size, off_t off,
+                     struct fuse_file_info *fi);
 int fuse_fs_write(struct fuse_fs *fs, const char *path, const char *buf,
-		  size_t size, off_t off, struct fuse_file_info *fi);
+                  size_t size, off_t off, struct fuse_file_info *fi);
 int fuse_fs_write_buf(struct fuse_fs *fs, const char *path,
-		      struct fuse_bufvec *buf, off_t off,
-		      struct fuse_file_info *fi);
+                      struct fuse_bufvec *buf, off_t off,
+                      struct fuse_file_info *fi);
 int fuse_fs_fsync(struct fuse_fs *fs, const char *path, int datasync,
-		  struct fuse_file_info *fi);
+                  struct fuse_file_info *fi);
 int fuse_fs_flush(struct fuse_fs *fs, const char *path,
-		  struct fuse_file_info *fi);
+                  struct fuse_file_info *fi);
 int fuse_fs_statfs(struct fuse_fs *fs, const char *path, struct statvfs *buf);
 int fuse_fs_opendir(struct fuse_fs *fs, const char *path,
-		    struct fuse_file_info *fi);
+                    struct fuse_file_info *fi);
 int fuse_fs_readdir(struct fuse_fs *fs, const char *path, void *buf,
-		    fuse_fill_dir_t filler, off_t off,
-		    struct fuse_file_info *fi, enum fuse_readdir_flags flags);
+                    fuse_fill_dir_t filler, off_t off,
+                    struct fuse_file_info *fi, enum fuse_readdir_flags flags);
 int fuse_fs_fsyncdir(struct fuse_fs *fs, const char *path, int datasync,
-		     struct fuse_file_info *fi);
+                     struct fuse_file_info *fi);
 int fuse_fs_releasedir(struct fuse_fs *fs, const char *path,
-		       struct fuse_file_info *fi);
+                       struct fuse_file_info *fi);
 int fuse_fs_create(struct fuse_fs *fs, const char *path, mode_t mode,
-		   struct fuse_file_info *fi);
+                   struct fuse_file_info *fi);
 int fuse_fs_lock(struct fuse_fs *fs, const char *path,
-		 struct fuse_file_info *fi, int cmd, struct flock *lock);
+                 struct fuse_file_info *fi, int cmd, struct flock *lock);
 int fuse_fs_flock(struct fuse_fs *fs, const char *path,
-		  struct fuse_file_info *fi, int op);
+                  struct fuse_file_info *fi, int op);
 int fuse_fs_chmod(struct fuse_fs *fs, const char *path, mode_t mode,
-		  struct fuse_file_info *fi);
+                  struct fuse_file_info *fi);
 int fuse_fs_chown(struct fuse_fs *fs, const char *path, uid_t uid, gid_t gid,
-		  struct fuse_file_info *fi);
+                  struct fuse_file_info *fi);
 int fuse_fs_truncate(struct fuse_fs *fs, const char *path, off_t size,
-		     struct fuse_file_info *fi);
+                     struct fuse_file_info *fi);
 int fuse_fs_utimens(struct fuse_fs *fs, const char *path,
-		    const struct timespec tv[2], struct fuse_file_info *fi);
+                    const struct timespec tv[2], struct fuse_file_info *fi);
 int fuse_fs_access(struct fuse_fs *fs, const char *path, int mask);
 int fuse_fs_readlink(struct fuse_fs *fs, const char *path, char *buf,
-		     size_t len);
+                     size_t len);
 int fuse_fs_mknod(struct fuse_fs *fs, const char *path, mode_t mode,
-		  dev_t rdev);
+                  dev_t rdev);
 int fuse_fs_mkdir(struct fuse_fs *fs, const char *path, mode_t mode);
 int fuse_fs_setxattr(struct fuse_fs *fs, const char *path, const char *name,
-		     const char *value, size_t size, int flags);
+                     const char *value, size_t size, int flags);
 int fuse_fs_getxattr(struct fuse_fs *fs, const char *path, const char *name,
-		     char *value, size_t size);
+                     char *value, size_t size);
 int fuse_fs_listxattr(struct fuse_fs *fs, const char *path, char *list,
-		      size_t size);
-int fuse_fs_removexattr(struct fuse_fs *fs, const char *path,
-			const char *name);
+                      size_t size);
+int fuse_fs_removexattr(struct fuse_fs *fs, const char *path, const char *name);
 int fuse_fs_bmap(struct fuse_fs *fs, const char *path, size_t blocksize,
-		 uint64_t *idx);
+                 uint64_t *idx);
 int fuse_fs_ioctl(struct fuse_fs *fs, const char *path, unsigned int cmd,
-		  void *arg, struct fuse_file_info *fi, unsigned int flags,
-		  void *data);
+                  void *arg, struct fuse_file_info *fi, unsigned int flags,
+                  void *data);
 int fuse_fs_poll(struct fuse_fs *fs, const char *path,
-		 struct fuse_file_info *fi, struct fuse_pollhandle *ph,
-		 unsigned *reventsp);
+                 struct fuse_file_info *fi, struct fuse_pollhandle *ph,
+                 unsigned *reventsp);
 int fuse_fs_fallocate(struct fuse_fs *fs, const char *path, int mode,
-		 off_t offset, off_t length, struct fuse_file_info *fi);
+                      off_t offset, off_t length, struct fuse_file_info *fi);
 ssize_t fuse_fs_copy_file_range(struct fuse_fs *fs, const char *path_in,
-				struct fuse_file_info *fi_in, off_t off_in,
-				const char *path_out,
-				struct fuse_file_info *fi_out, off_t off_out,
-				size_t len, int flags);
+                                struct fuse_file_info *fi_in, off_t off_in,
+                                const char *path_out,
+                                struct fuse_file_info *fi_out, off_t off_out,
+                                size_t len, int flags);
 off_t fuse_fs_lseek(struct fuse_fs *fs, const char *path, off_t off, int whence,
-		    struct fuse_file_info *fi);
+                    struct fuse_file_info *fi);
 void fuse_fs_init(struct fuse_fs *fs, struct fuse_conn_info *conn,
-		struct fuse_config *cfg);
+                  struct fuse_config *cfg);
 void fuse_fs_destroy(struct fuse_fs *fs);
 
 int fuse_notify_poll(struct fuse_pollhandle *ph);
@@ -1182,7 +1202,7 @@ int fuse_notify_poll(struct fuse_pollhandle *ph);
  * @return a new filesystem object
  */
 struct fuse_fs *fuse_fs_new(const struct fuse_operations *op, size_t op_size,
-			    void *private_data);
+                            void *private_data);
 
 /**
  * Factory for creating filesystem objects
@@ -1199,7 +1219,7 @@ struct fuse_fs *fuse_fs_new(const struct fuse_operations *op, size_t op_size,
  * @return the new filesystem object
  */
 typedef struct fuse_fs *(*fuse_module_factory_t)(struct fuse_args *args,
-						 struct fuse_fs *fs[]);
+                                                 struct fuse_fs *fs[]);
 /**
  * Register filesystem module
  *
@@ -1211,7 +1231,7 @@ typedef struct fuse_fs *(*fuse_module_factory_t)(struct fuse_args *args,
  * @param factory_ the factory function for this filesystem module
  */
 #define FUSE_REGISTER_MODULE(name_, factory_) \
-	fuse_module_factory_t fuse_module_ ## name_ ## _factory = factory_
+    fuse_module_factory_t fuse_module_##name_##_factory = factory_
 
 /** Get session from fuse object */
 struct fuse_session *fuse_get_session(struct fuse *f);
diff --git a/tools/virtiofsd/fuse_common.h b/tools/virtiofsd/fuse_common.h
index bf8f8cc865..bd9bf861f0 100644
--- a/tools/virtiofsd/fuse_common.h
+++ b/tools/virtiofsd/fuse_common.h
@@ -1,21 +1,23 @@
-/*  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
+/*
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB.
+ */
 
 /** @file */
 
 #if !defined(FUSE_H_) && !defined(FUSE_LOWLEVEL_H_)
-#error "Never include <fuse_common.h> directly; use <fuse.h> or <fuse_lowlevel.h> instead."
+#error \
+    "Never include <fuse_common.h> directly; use <fuse.h> or <fuse_lowlevel.h> instead."
 #endif
 
 #ifndef FUSE_COMMON_H_
 #define FUSE_COMMON_H_
 
-#include "fuse_opt.h"
 #include "fuse_log.h"
+#include "fuse_opt.h"
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -25,7 +27,7 @@
 /** Minor version of FUSE library interface */
 #define FUSE_MINOR_VERSION 2
 
-#define FUSE_MAKE_VERSION(maj, min)  ((maj) * 10 + (min))
+#define FUSE_MAKE_VERSION(maj, min) ((maj) * 10 + (min))
 #define FUSE_VERSION FUSE_MAKE_VERSION(FUSE_MAJOR_VERSION, FUSE_MINOR_VERSION)
 
 /**
@@ -38,67 +40,83 @@
  * descriptors can share a single file handle.
  */
 struct fuse_file_info {
-	/** Open flags.	 Available in open() and release() */
-	int flags;
-
-	/** In case of a write operation indicates if this was caused
-	    by a delayed write from the page cache. If so, then the
-	    context's pid, uid, and gid fields will not be valid, and
-	    the *fh* value may not match the *fh* value that would
-	    have been sent with the corresponding individual write
-	    requests if write caching had been disabled. */
-	unsigned int writepage : 1;
-
-	/** Can be filled in by open, to use direct I/O on this file. */
-	unsigned int direct_io : 1;
-
-	/** Can be filled in by open. It signals the kernel that any
-	    currently cached file data (ie., data that the filesystem
-	    provided the last time the file was open) need not be
-	    invalidated. Has no effect when set in other contexts (in
-	    particular it does nothing when set by opendir()). */
-	unsigned int keep_cache : 1;
-
-	/** Indicates a flush operation.  Set in flush operation, also
-	    maybe set in highlevel lock operation and lowlevel release
-	    operation. */
-	unsigned int flush : 1;
-
-	/** Can be filled in by open, to indicate that the file is not
-	    seekable. */
-	unsigned int nonseekable : 1;
-
-	/* Indicates that flock locks for this file should be
-	   released.  If set, lock_owner shall contain a valid value.
-	   May only be set in ->release(). */
-	unsigned int flock_release : 1;
-
-	/** Can be filled in by opendir. It signals the kernel to
-	    enable caching of entries returned by readdir().  Has no
-	    effect when set in other contexts (in particular it does
-	    nothing when set by open()). */
-	unsigned int cache_readdir : 1;
-
-	/** Padding.  Reserved for future use*/
-	unsigned int padding : 25;
-	unsigned int padding2 : 32;
-
-	/** File handle id.  May be filled in by filesystem in create,
-	 * open, and opendir().  Available in most other file operations on the
-	 * same file handle. */
-	uint64_t fh;
-
-	/** Lock owner id.  Available in locking operations and flush */
-	uint64_t lock_owner;
-
-	/** Requested poll events.  Available in ->poll.  Only set on kernels
-	    which support it.  If unsupported, this field is set to zero. */
-	uint32_t poll_events;
+    /** Open flags. Available in open() and release() */
+    int flags;
+
+    /*
+     * In case of a write operation indicates if this was caused
+     * by a delayed write from the page cache. If so, then the
+     * context's pid, uid, and gid fields will not be valid, and
+     * the *fh* value may not match the *fh* value that would
+     * have been sent with the corresponding individual write
+     * requests if write caching had been disabled.
+     */
+    unsigned int writepage:1;
+
+    /** Can be filled in by open, to use direct I/O on this file. */
+    unsigned int direct_io:1;
+
+    /*
+     *  Can be filled in by open. It signals the kernel that any
+     *  currently cached file data (ie., data that the filesystem
+     *  provided the last time the file was open) need not be
+     *  invalidated. Has no effect when set in other contexts (in
+     *  particular it does nothing when set by opendir()).
+     */
+    unsigned int keep_cache:1;
+
+    /*
+     *  Indicates a flush operation.  Set in flush operation, also
+     *  maybe set in highlevel lock operation and lowlevel release
+     *  operation.
+     */
+    unsigned int flush:1;
+
+    /*
+     *  Can be filled in by open, to indicate that the file is not
+     *  seekable.
+     */
+    unsigned int nonseekable:1;
+
+    /*
+     * Indicates that flock locks for this file should be
+     * released.  If set, lock_owner shall contain a valid value.
+     * May only be set in ->release().
+     */
+    unsigned int flock_release:1;
+
+    /*
+     *  Can be filled in by opendir. It signals the kernel to
+     *  enable caching of entries returned by readdir().  Has no
+     *  effect when set in other contexts (in particular it does
+     *  nothing when set by open()).
+     */
+    unsigned int cache_readdir:1;
+
+    /** Padding.  Reserved for future use*/
+    unsigned int padding:25;
+    unsigned int padding2:32;
+
+    /*
+     *  File handle id.  May be filled in by filesystem in create,
+     * open, and opendir().  Available in most other file operations on the
+     * same file handle.
+     */
+    uint64_t fh;
+
+    /** Lock owner id.  Available in locking operations and flush */
+    uint64_t lock_owner;
+
+    /*
+     * Requested poll events.  Available in ->poll.  Only set on kernels
+     * which support it.  If unsupported, this field is set to zero.
+     */
+    uint32_t poll_events;
 };
 
-/**************************************************************************
- * Capability bits for 'fuse_conn_info.capable' and 'fuse_conn_info.want' *
- **************************************************************************/
+/*
+ * Capability bits for 'fuse_conn_info.capable' and 'fuse_conn_info.want'
+ */
 
 /**
  * Indicates that the filesystem supports asynchronous read requests.
@@ -110,7 +128,7 @@ struct fuse_file_info {
  *
  * This feature is enabled by default when supported by the kernel.
  */
-#define FUSE_CAP_ASYNC_READ		(1 << 0)
+#define FUSE_CAP_ASYNC_READ (1 << 0)
 
 /**
  * Indicates that the filesystem supports "remote" locking.
@@ -118,7 +136,7 @@ struct fuse_file_info {
  * This feature is enabled by default when supported by the kernel,
  * and if getlk() and setlk() handlers are implemented.
  */
-#define FUSE_CAP_POSIX_LOCKS		(1 << 1)
+#define FUSE_CAP_POSIX_LOCKS (1 << 1)
 
 /**
  * Indicates that the filesystem supports the O_TRUNC open flag.  If
@@ -127,14 +145,14 @@ struct fuse_file_info {
  *
  * This feature is enabled by default when supported by the kernel.
  */
-#define FUSE_CAP_ATOMIC_O_TRUNC		(1 << 3)
+#define FUSE_CAP_ATOMIC_O_TRUNC (1 << 3)
 
 /**
  * Indicates that the filesystem supports lookups of "." and "..".
  *
  * This feature is disabled by default.
  */
-#define FUSE_CAP_EXPORT_SUPPORT		(1 << 4)
+#define FUSE_CAP_EXPORT_SUPPORT (1 << 4)
 
 /**
  * Indicates that the kernel should not apply the umask to the
@@ -142,7 +160,7 @@ struct fuse_file_info {
  *
  * This feature is disabled by default.
  */
-#define FUSE_CAP_DONT_MASK		(1 << 6)
+#define FUSE_CAP_DONT_MASK (1 << 6)
 
 /**
  * Indicates that libfuse should try to use splice() when writing to
@@ -150,7 +168,7 @@ struct fuse_file_info {
  *
  * This feature is disabled by default.
  */
-#define FUSE_CAP_SPLICE_WRITE		(1 << 7)
+#define FUSE_CAP_SPLICE_WRITE (1 << 7)
 
 /**
  * Indicates that libfuse should try to move pages instead of copying when
@@ -158,7 +176,7 @@ struct fuse_file_info {
  *
  * This feature is disabled by default.
  */
-#define FUSE_CAP_SPLICE_MOVE		(1 << 8)
+#define FUSE_CAP_SPLICE_MOVE (1 << 8)
 
 /**
  * Indicates that libfuse should try to use splice() when reading from
@@ -167,7 +185,7 @@ struct fuse_file_info {
  * This feature is enabled by default when supported by the kernel and
  * if the filesystem implements a write_buf() handler.
  */
-#define FUSE_CAP_SPLICE_READ		(1 << 9)
+#define FUSE_CAP_SPLICE_READ (1 << 9)
 
 /**
  * If set, the calls to flock(2) will be emulated using POSIX locks and must
@@ -180,14 +198,14 @@ struct fuse_file_info {
  * This feature is enabled by default when supported by the kernel and
  * if the filesystem implements a flock() handler.
  */
-#define FUSE_CAP_FLOCK_LOCKS		(1 << 10)
+#define FUSE_CAP_FLOCK_LOCKS (1 << 10)
 
 /**
  * Indicates that the filesystem supports ioctl's on directories.
  *
  * This feature is enabled by default when supported by the kernel.
  */
-#define FUSE_CAP_IOCTL_DIR		(1 << 11)
+#define FUSE_CAP_IOCTL_DIR (1 << 11)
 
 /**
  * Traditionally, while a file is open the FUSE kernel module only
@@ -209,7 +227,7 @@ struct fuse_file_info {
  *
  * This feature is enabled by default when supported by the kernel.
  */
-#define FUSE_CAP_AUTO_INVAL_DATA	(1 << 12)
+#define FUSE_CAP_AUTO_INVAL_DATA (1 << 12)
 
 /**
  * Indicates that the filesystem supports readdirplus.
@@ -217,7 +235,7 @@ struct fuse_file_info {
  * This feature is enabled by default when supported by the kernel and if the
  * filesystem implements a readdirplus() handler.
  */
-#define FUSE_CAP_READDIRPLUS		(1 << 13)
+#define FUSE_CAP_READDIRPLUS (1 << 13)
 
 /**
  * Indicates that the filesystem supports adaptive readdirplus.
@@ -245,7 +263,7 @@ struct fuse_file_info {
  * if the filesystem implements both a readdirplus() and a readdir()
  * handler.
  */
-#define FUSE_CAP_READDIRPLUS_AUTO	(1 << 14)
+#define FUSE_CAP_READDIRPLUS_AUTO (1 << 14)
 
 /**
  * Indicates that the filesystem supports asynchronous direct I/O submission.
@@ -256,7 +274,7 @@ struct fuse_file_info {
  *
  * This feature is enabled by default when supported by the kernel.
  */
-#define FUSE_CAP_ASYNC_DIO		(1 << 15)
+#define FUSE_CAP_ASYNC_DIO (1 << 15)
 
 /**
  * Indicates that writeback caching should be enabled. This means that
@@ -265,7 +283,7 @@ struct fuse_file_info {
  *
  * This feature is disabled by default.
  */
-#define FUSE_CAP_WRITEBACK_CACHE	(1 << 16)
+#define FUSE_CAP_WRITEBACK_CACHE (1 << 16)
 
 /**
  * Indicates support for zero-message opens. If this flag is set in
@@ -278,7 +296,7 @@ struct fuse_file_info {
  * Setting (or unsetting) this flag in the `want` field has *no
  * effect*.
  */
-#define FUSE_CAP_NO_OPEN_SUPPORT	(1 << 17)
+#define FUSE_CAP_NO_OPEN_SUPPORT (1 << 17)
 
 /**
  * Indicates support for parallel directory operations. If this flag
@@ -288,7 +306,7 @@ struct fuse_file_info {
  *
  * This feature is enabled by default when supported by the kernel.
  */
-#define FUSE_CAP_PARALLEL_DIROPS        (1 << 18)
+#define FUSE_CAP_PARALLEL_DIROPS (1 << 18)
 
 /**
  * Indicates support for POSIX ACLs.
@@ -307,7 +325,7 @@ struct fuse_file_info {
  *
  * This feature is disabled by default.
  */
-#define FUSE_CAP_POSIX_ACL              (1 << 19)
+#define FUSE_CAP_POSIX_ACL (1 << 19)
 
 /**
  * Indicates that the filesystem is responsible for unsetting
@@ -316,7 +334,7 @@ struct fuse_file_info {
  *
  * This feature is enabled by default when supported by the kernel.
  */
-#define FUSE_CAP_HANDLE_KILLPRIV         (1 << 20)
+#define FUSE_CAP_HANDLE_KILLPRIV (1 << 20)
 
 /**
  * Indicates support for zero-message opendirs. If this flag is set in
@@ -328,7 +346,7 @@ struct fuse_file_info {
  *
  * Setting (or unsetting) this flag in the `want` field has *no effect*.
  */
-#define FUSE_CAP_NO_OPENDIR_SUPPORT    (1 << 24)
+#define FUSE_CAP_NO_OPENDIR_SUPPORT (1 << 24)
 
 /**
  * Ioctl flags
@@ -340,12 +358,12 @@ struct fuse_file_info {
  *
  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
  */
-#define FUSE_IOCTL_COMPAT	(1 << 0)
-#define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
-#define FUSE_IOCTL_RETRY	(1 << 2)
-#define FUSE_IOCTL_DIR		(1 << 4)
+#define FUSE_IOCTL_COMPAT (1 << 0)
+#define FUSE_IOCTL_UNRESTRICTED (1 << 1)
+#define FUSE_IOCTL_RETRY (1 << 2)
+#define FUSE_IOCTL_DIR (1 << 4)
 
-#define FUSE_IOCTL_MAX_IOV	256
+#define FUSE_IOCTL_MAX_IOV 256
 
 /**
  * Connection information, passed to the ->init() method
@@ -355,114 +373,114 @@ struct fuse_file_info {
  * value must usually be smaller than the indicated value.
  */
 struct fuse_conn_info {
-	/**
-	 * Major version of the protocol (read-only)
-	 */
-	unsigned proto_major;
-
-	/**
-	 * Minor version of the protocol (read-only)
-	 */
-	unsigned proto_minor;
-
-	/**
-	 * Maximum size of the write buffer
-	 */
-	unsigned max_write;
-
-	/**
-	 * Maximum size of read requests. A value of zero indicates no
-	 * limit. However, even if the filesystem does not specify a
-	 * limit, the maximum size of read requests will still be
-	 * limited by the kernel.
-	 *
-	 * NOTE: For the time being, the maximum size of read requests
-	 * must be set both here *and* passed to fuse_session_new()
-	 * using the ``-o max_read=<n>`` mount option. At some point
-	 * in the future, specifying the mount option will no longer
-	 * be necessary.
-	 */
-	unsigned max_read;
-
-	/**
-	 * Maximum readahead
-	 */
-	unsigned max_readahead;
-
-	/**
-	 * Capability flags that the kernel supports (read-only)
-	 */
-	unsigned capable;
-
-	/**
-	 * Capability flags that the filesystem wants to enable.
-	 *
-	 * libfuse attempts to initialize this field with
-	 * reasonable default values before calling the init() handler.
-	 */
-	unsigned want;
-
-	/**
-	 * Maximum number of pending "background" requests. A
-	 * background request is any type of request for which the
-	 * total number is not limited by other means. As of kernel
-	 * 4.8, only two types of requests fall into this category:
-	 *
-	 *   1. Read-ahead requests
-	 *   2. Asynchronous direct I/O requests
-	 *
-	 * Read-ahead requests are generated (if max_readahead is
-	 * non-zero) by the kernel to preemptively fill its caches
-	 * when it anticipates that userspace will soon read more
-	 * data.
-	 *
-	 * Asynchronous direct I/O requests are generated if
-	 * FUSE_CAP_ASYNC_DIO is enabled and userspace submits a large
-	 * direct I/O request. In this case the kernel will internally
-	 * split it up into multiple smaller requests and submit them
-	 * to the filesystem concurrently.
-	 *
-	 * Note that the following requests are *not* background
-	 * requests: writeback requests (limited by the kernel's
-	 * flusher algorithm), regular (i.e., synchronous and
-	 * buffered) userspace read/write requests (limited to one per
-	 * thread), asynchronous read requests (Linux's io_submit(2)
-	 * call actually blocks, so these are also limited to one per
-	 * thread).
-	 */
-	unsigned max_background;
-
-	/**
-	 * Kernel congestion threshold parameter. If the number of pending
-	 * background requests exceeds this number, the FUSE kernel module will
-	 * mark the filesystem as "congested". This instructs the kernel to
-	 * expect that queued requests will take some time to complete, and to
-	 * adjust its algorithms accordingly (e.g. by putting a waiting thread
-	 * to sleep instead of using a busy-loop).
-	 */
-	unsigned congestion_threshold;
-
-	/**
-	 * When FUSE_CAP_WRITEBACK_CACHE is enabled, the kernel is responsible
-	 * for updating mtime and ctime when write requests are received. The
-	 * updated values are passed to the filesystem with setattr() requests.
-	 * However, if the filesystem does not support the full resolution of
-	 * the kernel timestamps (nanoseconds), the mtime and ctime values used
-	 * by kernel and filesystem will differ (and result in an apparent
-	 * change of times after a cache flush).
-	 *
-	 * To prevent this problem, this variable can be used to inform the
-	 * kernel about the timestamp granularity supported by the file-system.
-	 * The value should be power of 10.  The default is 1, i.e. full
-	 * nano-second resolution. Filesystems supporting only second resolution
-	 * should set this to 1000000000.
-	 */
-	unsigned time_gran;
-
-	/**
-	 * For future use.
-	 */
-	unsigned reserved[22];
+    /**
+     * Major version of the protocol (read-only)
+     */
+    unsigned proto_major;
+
+    /**
+     * Minor version of the protocol (read-only)
+     */
+    unsigned proto_minor;
+
+    /**
+     * Maximum size of the write buffer
+     */
+    unsigned max_write;
+
+    /**
+     * Maximum size of read requests. A value of zero indicates no
+     * limit. However, even if the filesystem does not specify a
+     * limit, the maximum size of read requests will still be
+     * limited by the kernel.
+     *
+     * NOTE: For the time being, the maximum size of read requests
+     * must be set both here *and* passed to fuse_session_new()
+     * using the ``-o max_read=<n>`` mount option. At some point
+     * in the future, specifying the mount option will no longer
+     * be necessary.
+     */
+    unsigned max_read;
+
+    /**
+     * Maximum readahead
+     */
+    unsigned max_readahead;
+
+    /**
+     * Capability flags that the kernel supports (read-only)
+     */
+    unsigned capable;
+
+    /**
+     * Capability flags that the filesystem wants to enable.
+     *
+     * libfuse attempts to initialize this field with
+     * reasonable default values before calling the init() handler.
+     */
+    unsigned want;
+
+    /**
+     * Maximum number of pending "background" requests. A
+     * background request is any type of request for which the
+     * total number is not limited by other means. As of kernel
+     * 4.8, only two types of requests fall into this category:
+     *
+     *   1. Read-ahead requests
+     *   2. Asynchronous direct I/O requests
+     *
+     * Read-ahead requests are generated (if max_readahead is
+     * non-zero) by the kernel to preemptively fill its caches
+     * when it anticipates that userspace will soon read more
+     * data.
+     *
+     * Asynchronous direct I/O requests are generated if
+     * FUSE_CAP_ASYNC_DIO is enabled and userspace submits a large
+     * direct I/O request. In this case the kernel will internally
+     * split it up into multiple smaller requests and submit them
+     * to the filesystem concurrently.
+     *
+     * Note that the following requests are *not* background
+     * requests: writeback requests (limited by the kernel's
+     * flusher algorithm), regular (i.e., synchronous and
+     * buffered) userspace read/write requests (limited to one per
+     * thread), asynchronous read requests (Linux's io_submit(2)
+     * call actually blocks, so these are also limited to one per
+     * thread).
+     */
+    unsigned max_background;
+
+    /**
+     * Kernel congestion threshold parameter. If the number of pending
+     * background requests exceeds this number, the FUSE kernel module will
+     * mark the filesystem as "congested". This instructs the kernel to
+     * expect that queued requests will take some time to complete, and to
+     * adjust its algorithms accordingly (e.g. by putting a waiting thread
+     * to sleep instead of using a busy-loop).
+     */
+    unsigned congestion_threshold;
+
+    /**
+     * When FUSE_CAP_WRITEBACK_CACHE is enabled, the kernel is responsible
+     * for updating mtime and ctime when write requests are received. The
+     * updated values are passed to the filesystem with setattr() requests.
+     * However, if the filesystem does not support the full resolution of
+     * the kernel timestamps (nanoseconds), the mtime and ctime values used
+     * by kernel and filesystem will differ (and result in an apparent
+     * change of times after a cache flush).
+     *
+     * To prevent this problem, this variable can be used to inform the
+     * kernel about the timestamp granularity supported by the file-system.
+     * The value should be power of 10.  The default is 1, i.e. full
+     * nano-second resolution. Filesystems supporting only second resolution
+     * should set this to 1000000000.
+     */
+    unsigned time_gran;
+
+    /**
+     * For future use.
+     */
+    unsigned reserved[22];
 };
 
 struct fuse_session;
@@ -489,21 +507,20 @@ struct fuse_conn_info_opts;
  *   -o async_read          sets FUSE_CAP_ASYNC_READ in conn->want
  *   -o sync_read           unsets FUSE_CAP_ASYNC_READ in conn->want
  *   -o atomic_o_trunc      sets FUSE_CAP_ATOMIC_O_TRUNC in conn->want
- *   -o no_remote_lock      Equivalent to -o no_remote_flock,no_remote_posix_lock
- *   -o no_remote_flock     Unsets FUSE_CAP_FLOCK_LOCKS in conn->want
- *   -o no_remote_posix_lock  Unsets FUSE_CAP_POSIX_LOCKS in conn->want
- *   -o [no_]splice_write     (un-)sets FUSE_CAP_SPLICE_WRITE in conn->want
- *   -o [no_]splice_move      (un-)sets FUSE_CAP_SPLICE_MOVE in conn->want
- *   -o [no_]splice_read      (un-)sets FUSE_CAP_SPLICE_READ in conn->want
- *   -o [no_]auto_inval_data  (un-)sets FUSE_CAP_AUTO_INVAL_DATA in conn->want
- *   -o readdirplus=no        unsets FUSE_CAP_READDIRPLUS in conn->want
- *   -o readdirplus=yes       sets FUSE_CAP_READDIRPLUS and unsets
- *                            FUSE_CAP_READDIRPLUS_AUTO in conn->want
- *   -o readdirplus=auto      sets FUSE_CAP_READDIRPLUS and
- *                            FUSE_CAP_READDIRPLUS_AUTO in conn->want
- *   -o [no_]async_dio        (un-)sets FUSE_CAP_ASYNC_DIO in conn->want
- *   -o [no_]writeback_cache  (un-)sets FUSE_CAP_WRITEBACK_CACHE in conn->want
- *   -o time_gran=N           sets conn->time_gran
+ *   -o no_remote_lock      Equivalent to -o
+ *no_remote_flock,no_remote_posix_lock -o no_remote_flock     Unsets
+ *FUSE_CAP_FLOCK_LOCKS in conn->want -o no_remote_posix_lock  Unsets
+ *FUSE_CAP_POSIX_LOCKS in conn->want -o [no_]splice_write     (un-)sets
+ *FUSE_CAP_SPLICE_WRITE in conn->want -o [no_]splice_move      (un-)sets
+ *FUSE_CAP_SPLICE_MOVE in conn->want -o [no_]splice_read      (un-)sets
+ *FUSE_CAP_SPLICE_READ in conn->want -o [no_]auto_inval_data  (un-)sets
+ *FUSE_CAP_AUTO_INVAL_DATA in conn->want -o readdirplus=no        unsets
+ *FUSE_CAP_READDIRPLUS in conn->want -o readdirplus=yes       sets
+ *FUSE_CAP_READDIRPLUS and unsets FUSE_CAP_READDIRPLUS_AUTO in conn->want -o
+ *readdirplus=auto      sets FUSE_CAP_READDIRPLUS and FUSE_CAP_READDIRPLUS_AUTO
+ *in conn->want -o [no_]async_dio        (un-)sets FUSE_CAP_ASYNC_DIO in
+ *conn->want -o [no_]writeback_cache  (un-)sets FUSE_CAP_WRITEBACK_CACHE in
+ *conn->want -o time_gran=N           sets conn->time_gran
  *
  * Known options will be removed from *args*, unknown options will be
  * passed through unchanged.
@@ -511,7 +528,7 @@ struct fuse_conn_info_opts;
  * @param args argument vector (input+output)
  * @return parsed options
  **/
-struct fuse_conn_info_opts* fuse_parse_conn_info_opts(struct fuse_args *args);
+struct fuse_conn_info_opts *fuse_parse_conn_info_opts(struct fuse_args *args);
 
 /**
  * This function applies the (parsed) parameters in *opts* to the
@@ -521,7 +538,7 @@ struct fuse_conn_info_opts* fuse_parse_conn_info_opts(struct fuse_args *args);
  * option has been explicitly set.
  */
 void fuse_apply_conn_info_opts(struct fuse_conn_info_opts *opts,
-			  struct fuse_conn_info *conn);
+                               struct fuse_conn_info *conn);
 
 /**
  * Go into the background
@@ -552,81 +569,81 @@ const char *fuse_pkgversion(void);
  */
 void fuse_pollhandle_destroy(struct fuse_pollhandle *ph);
 
-/* ----------------------------------------------------------- *
- * Data buffer						       *
- * ----------------------------------------------------------- */
+/*
+ * Data buffer
+ */
 
 /**
  * Buffer flags
  */
 enum fuse_buf_flags {
-	/**
-	 * Buffer contains a file descriptor
-	 *
-	 * If this flag is set, the .fd field is valid, otherwise the
-	 * .mem fields is valid.
-	 */
-	FUSE_BUF_IS_FD		= (1 << 1),
-
-	/**
-	 * Seek on the file descriptor
-	 *
-	 * If this flag is set then the .pos field is valid and is
-	 * used to seek to the given offset before performing
-	 * operation on file descriptor.
-	 */
-	FUSE_BUF_FD_SEEK	= (1 << 2),
-
-	/**
-	 * Retry operation on file descriptor
-	 *
-	 * If this flag is set then retry operation on file descriptor
-	 * until .size bytes have been copied or an error or EOF is
-	 * detected.
-	 */
-	FUSE_BUF_FD_RETRY	= (1 << 3),
+    /**
+     * Buffer contains a file descriptor
+     *
+     * If this flag is set, the .fd field is valid, otherwise the
+     * .mem fields is valid.
+     */
+    FUSE_BUF_IS_FD = (1 << 1),
+
+    /**
+     * Seek on the file descriptor
+     *
+     * If this flag is set then the .pos field is valid and is
+     * used to seek to the given offset before performing
+     * operation on file descriptor.
+     */
+    FUSE_BUF_FD_SEEK = (1 << 2),
+
+    /**
+     * Retry operation on file descriptor
+     *
+     * If this flag is set then retry operation on file descriptor
+     * until .size bytes have been copied or an error or EOF is
+     * detected.
+     */
+    FUSE_BUF_FD_RETRY = (1 << 3),
 };
 
 /**
  * Buffer copy flags
  */
 enum fuse_buf_copy_flags {
-	/**
-	 * Don't use splice(2)
-	 *
-	 * Always fall back to using read and write instead of
-	 * splice(2) to copy data from one file descriptor to another.
-	 *
-	 * If this flag is not set, then only fall back if splice is
-	 * unavailable.
-	 */
-	FUSE_BUF_NO_SPLICE	= (1 << 1),
-
-	/**
-	 * Force splice
-	 *
-	 * Always use splice(2) to copy data from one file descriptor
-	 * to another.  If splice is not available, return -EINVAL.
-	 */
-	FUSE_BUF_FORCE_SPLICE	= (1 << 2),
-
-	/**
-	 * Try to move data with splice.
-	 *
-	 * If splice is used, try to move pages from the source to the
-	 * destination instead of copying.  See documentation of
-	 * SPLICE_F_MOVE in splice(2) man page.
-	 */
-	FUSE_BUF_SPLICE_MOVE	= (1 << 3),
-
-	/**
-	 * Don't block on the pipe when copying data with splice
-	 *
-	 * Makes the operations on the pipe non-blocking (if the pipe
-	 * is full or empty).  See SPLICE_F_NONBLOCK in the splice(2)
-	 * man page.
-	 */
-	FUSE_BUF_SPLICE_NONBLOCK= (1 << 4),
+    /**
+     * Don't use splice(2)
+     *
+     * Always fall back to using read and write instead of
+     * splice(2) to copy data from one file descriptor to another.
+     *
+     * If this flag is not set, then only fall back if splice is
+     * unavailable.
+     */
+    FUSE_BUF_NO_SPLICE = (1 << 1),
+
+    /**
+     * Force splice
+     *
+     * Always use splice(2) to copy data from one file descriptor
+     * to another.  If splice is not available, return -EINVAL.
+     */
+    FUSE_BUF_FORCE_SPLICE = (1 << 2),
+
+    /**
+     * Try to move data with splice.
+     *
+     * If splice is used, try to move pages from the source to the
+     * destination instead of copying.  See documentation of
+     * SPLICE_F_MOVE in splice(2) man page.
+     */
+    FUSE_BUF_SPLICE_MOVE = (1 << 3),
+
+    /**
+     * Don't block on the pipe when copying data with splice
+     *
+     * Makes the operations on the pipe non-blocking (if the pipe
+     * is full or empty).  See SPLICE_F_NONBLOCK in the splice(2)
+     * man page.
+     */
+    FUSE_BUF_SPLICE_NONBLOCK = (1 << 4),
 };
 
 /**
@@ -636,36 +653,36 @@ enum fuse_buf_copy_flags {
  * be supplied as a memory pointer or as a file descriptor
  */
 struct fuse_buf {
-	/**
-	 * Size of data in bytes
-	 */
-	size_t size;
-
-	/**
-	 * Buffer flags
-	 */
-	enum fuse_buf_flags flags;
-
-	/**
-	 * Memory pointer
-	 *
-	 * Used unless FUSE_BUF_IS_FD flag is set.
-	 */
-	void *mem;
-
-	/**
-	 * File descriptor
-	 *
-	 * Used if FUSE_BUF_IS_FD flag is set.
-	 */
-	int fd;
-
-	/**
-	 * File position
-	 *
-	 * Used if FUSE_BUF_FD_SEEK flag is set.
-	 */
-	off_t pos;
+    /**
+     * Size of data in bytes
+     */
+    size_t size;
+
+    /**
+     * Buffer flags
+     */
+    enum fuse_buf_flags flags;
+
+    /**
+     * Memory pointer
+     *
+     * Used unless FUSE_BUF_IS_FD flag is set.
+     */
+    void *mem;
+
+    /**
+     * File descriptor
+     *
+     * Used if FUSE_BUF_IS_FD flag is set.
+     */
+    int fd;
+
+    /**
+     * File position
+     *
+     * Used if FUSE_BUF_FD_SEEK flag is set.
+     */
+    off_t pos;
 };
 
 /**
@@ -677,41 +694,39 @@ struct fuse_buf {
  * Allocate dynamically to add more than one buffer.
  */
 struct fuse_bufvec {
-	/**
-	 * Number of buffers in the array
-	 */
-	size_t count;
-
-	/**
-	 * Index of current buffer within the array
-	 */
-	size_t idx;
-
-	/**
-	 * Current offset within the current buffer
-	 */
-	size_t off;
-
-	/**
-	 * Array of buffers
-	 */
-	struct fuse_buf buf[1];
+    /**
+     * Number of buffers in the array
+     */
+    size_t count;
+
+    /**
+     * Index of current buffer within the array
+     */
+    size_t idx;
+
+    /**
+     * Current offset within the current buffer
+     */
+    size_t off;
+
+    /**
+     * Array of buffers
+     */
+    struct fuse_buf buf[1];
 };
 
 /* Initialize bufvec with a single buffer of given size */
-#define FUSE_BUFVEC_INIT(size__)				\
-	((struct fuse_bufvec) {					\
-		/* .count= */ 1,				\
-		/* .idx =  */ 0,				\
-		/* .off =  */ 0,				\
-		/* .buf =  */ { /* [0] = */ {			\
-			/* .size =  */ (size__),		\
-			/* .flags = */ (enum fuse_buf_flags) 0,	\
-			/* .mem =   */ NULL,			\
-			/* .fd =    */ -1,			\
-			/* .pos =   */ 0,			\
-		} }						\
-	} )
+#define FUSE_BUFVEC_INIT(size__)                                      \
+    ((struct fuse_bufvec){ /* .count= */ 1,                           \
+                           /* .idx =  */ 0,                           \
+                           /* .off =  */ 0, /* .buf =  */             \
+                           { /* [0] = */ {                            \
+                               /* .size =  */ (size__),               \
+                               /* .flags = */ (enum fuse_buf_flags)0, \
+                               /* .mem =   */ NULL,                   \
+                               /* .fd =    */ -1,                     \
+                               /* .pos =   */ 0,                      \
+                           } } })
 
 /**
  * Get total size of data in a fuse buffer vector
@@ -730,16 +745,16 @@ size_t fuse_buf_size(const struct fuse_bufvec *bufv);
  * @return actual number of bytes copied or -errno on error
  */
 ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src,
-		      enum fuse_buf_copy_flags flags);
+                      enum fuse_buf_copy_flags flags);
 
-/* ----------------------------------------------------------- *
- * Signal handling					       *
- * ----------------------------------------------------------- */
+/*
+ * Signal handling
+ */
 
 /**
  * Exit session on HUP, TERM and INT signals and ignore PIPE signal
  *
- * Stores session in a global variable.	 May only be called once per
+ * Stores session in a global variable. May only be called once per
  * process until fuse_remove_signal_handlers() is called.
  *
  * Once either of the POSIX signals arrives, the signal handler calls
@@ -766,12 +781,12 @@ int fuse_set_signal_handlers(struct fuse_session *se);
  */
 void fuse_remove_signal_handlers(struct fuse_session *se);
 
-/* ----------------------------------------------------------- *
- * Compatibility stuff					       *
- * ----------------------------------------------------------- */
+/*
+ * Compatibility stuff
+ */
 
 #if !defined(FUSE_USE_VERSION) || FUSE_USE_VERSION < 30
-#  error only API version 30 or greater is supported
+#error only API version 30 or greater is supported
 #endif
 
 
@@ -781,11 +796,14 @@ void fuse_remove_signal_handlers(struct fuse_session *se);
  * On 32bit systems please add -D_FILE_OFFSET_BITS=64 to your compile flags!
  */
 
-#if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 6) && !defined __cplusplus
+#if defined(__GNUC__) &&                                      \
+    (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 6) && \
+    !defined __cplusplus
 _Static_assert(sizeof(off_t) == 8, "fuse: off_t must be 64bit");
 #else
-struct _fuse_off_t_must_be_64bit_dummy_struct \
-	{ unsigned _fuse_off_t_must_be_64bit:((sizeof(off_t) == 8) ? 1 : -1); };
+struct _fuse_off_t_must_be_64bit_dummy_struct {
+    unsigned _fuse_off_t_must_be_64bit:((sizeof(off_t) == 8) ? 1 : -1);
+};
 #endif
 
 #endif /* FUSE_COMMON_H_ */
diff --git a/tools/virtiofsd/fuse_i.h b/tools/virtiofsd/fuse_i.h
index b39522e3ca..e63cb58388 100644
--- a/tools/virtiofsd/fuse_i.h
+++ b/tools/virtiofsd/fuse_i.h
@@ -1,71 +1,71 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB
+ */
 
 #include "fuse.h"
 #include "fuse_lowlevel.h"
 
 struct fuse_req {
-	struct fuse_session *se;
-	uint64_t unique;
-	int ctr;
-	pthread_mutex_t lock;
-	struct fuse_ctx ctx;
-	struct fuse_chan *ch;
-	int interrupted;
-	unsigned int ioctl_64bit : 1;
-	union {
-		struct {
-			uint64_t unique;
-		} i;
-		struct {
-			fuse_interrupt_func_t func;
-			void *data;
-		} ni;
-	} u;
-	struct fuse_req *next;
-	struct fuse_req *prev;
+    struct fuse_session *se;
+    uint64_t unique;
+    int ctr;
+    pthread_mutex_t lock;
+    struct fuse_ctx ctx;
+    struct fuse_chan *ch;
+    int interrupted;
+    unsigned int ioctl_64bit:1;
+    union {
+        struct {
+            uint64_t unique;
+        } i;
+        struct {
+            fuse_interrupt_func_t func;
+            void *data;
+        } ni;
+    } u;
+    struct fuse_req *next;
+    struct fuse_req *prev;
 };
 
 struct fuse_notify_req {
-	uint64_t unique;
-	void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
-		      const void *, const struct fuse_buf *);
-	struct fuse_notify_req *next;
-	struct fuse_notify_req *prev;
+    uint64_t unique;
+    void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
+                  const void *, const struct fuse_buf *);
+    struct fuse_notify_req *next;
+    struct fuse_notify_req *prev;
 };
 
 struct fuse_session {
-	char *mountpoint;
-	volatile int exited;
-	int fd;
-	int debug;
-	int deny_others;
-	struct fuse_lowlevel_ops op;
-	int got_init;
-	struct cuse_data *cuse_data;
-	void *userdata;
-	uid_t owner;
-	struct fuse_conn_info conn;
-	struct fuse_req list;
-	struct fuse_req interrupts;
-	pthread_mutex_t lock;
-	int got_destroy;
-	int broken_splice_nonblock;
-	uint64_t notify_ctr;
-	struct fuse_notify_req notify_list;
-	size_t bufsize;
-	int error;
+    char *mountpoint;
+    volatile int exited;
+    int fd;
+    int debug;
+    int deny_others;
+    struct fuse_lowlevel_ops op;
+    int got_init;
+    struct cuse_data *cuse_data;
+    void *userdata;
+    uid_t owner;
+    struct fuse_conn_info conn;
+    struct fuse_req list;
+    struct fuse_req interrupts;
+    pthread_mutex_t lock;
+    int got_destroy;
+    int broken_splice_nonblock;
+    uint64_t notify_ctr;
+    struct fuse_notify_req notify_list;
+    size_t bufsize;
+    int error;
 };
 
 struct fuse_chan {
-	pthread_mutex_t lock;
-	int ctr;
-	int fd;
+    pthread_mutex_t lock;
+    int ctr;
+    int fd;
 };
 
 /**
@@ -76,19 +76,20 @@ struct fuse_chan {
  *
  */
 struct fuse_module {
-	char *name;
-	fuse_module_factory_t factory;
-	struct fuse_module *next;
-	struct fusemod_so *so;
-	int ctr;
+    char *name;
+    fuse_module_factory_t factory;
+    struct fuse_module *next;
+    struct fusemod_so *so;
+    int ctr;
 };
 
 int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
-			       int count);
+                               int count);
 void fuse_free_req(fuse_req_t req);
 
 void fuse_session_process_buf_int(struct fuse_session *se,
-				  const struct fuse_buf *buf, struct fuse_chan *ch);
+                                  const struct fuse_buf *buf,
+                                  struct fuse_chan *ch);
 
 
 #define FUSE_MAX_MAX_PAGES 256
diff --git a/tools/virtiofsd/fuse_log.c b/tools/virtiofsd/fuse_log.c
index 0d268ab014..11345f9ec8 100644
--- a/tools/virtiofsd/fuse_log.c
+++ b/tools/virtiofsd/fuse_log.c
@@ -1,40 +1,40 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2019  Red Hat, Inc.
-
-  Logging API.
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2019  Red Hat, Inc.
+ *
+ * Logging API.
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB
+ */
 
 #include "fuse_log.h"
 
 #include <stdarg.h>
 #include <stdio.h>
 
-static void default_log_func(
-		__attribute__(( unused )) enum fuse_log_level level,
-		const char *fmt, va_list ap)
+static void default_log_func(__attribute__((unused)) enum fuse_log_level level,
+                             const char *fmt, va_list ap)
 {
-	vfprintf(stderr, fmt, ap);
+    vfprintf(stderr, fmt, ap);
 }
 
 static fuse_log_func_t log_func = default_log_func;
 
 void fuse_set_log_func(fuse_log_func_t func)
 {
-	if (!func)
-		func = default_log_func;
+    if (!func) {
+        func = default_log_func;
+    }
 
-	log_func = func;
+    log_func = func;
 }
 
 void fuse_log(enum fuse_log_level level, const char *fmt, ...)
 {
-	va_list ap;
+    va_list ap;
 
-	va_start(ap, fmt);
-	log_func(level, fmt, ap);
-	va_end(ap);
+    va_start(ap, fmt);
+    log_func(level, fmt, ap);
+    va_end(ap);
 }
diff --git a/tools/virtiofsd/fuse_log.h b/tools/virtiofsd/fuse_log.h
index 0af700da6b..bf6c11ff11 100644
--- a/tools/virtiofsd/fuse_log.h
+++ b/tools/virtiofsd/fuse_log.h
@@ -1,10 +1,10 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2019  Red Hat, Inc.
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2019  Red Hat, Inc.
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB.
+ */
 
 #ifndef FUSE_LOG_H_
 #define FUSE_LOG_H_
@@ -22,14 +22,14 @@
  * These levels correspond to syslog(2) log levels since they are widely used.
  */
 enum fuse_log_level {
-	FUSE_LOG_EMERG,
-	FUSE_LOG_ALERT,
-	FUSE_LOG_CRIT,
-	FUSE_LOG_ERR,
-	FUSE_LOG_WARNING,
-	FUSE_LOG_NOTICE,
-	FUSE_LOG_INFO,
-	FUSE_LOG_DEBUG
+    FUSE_LOG_EMERG,
+    FUSE_LOG_ALERT,
+    FUSE_LOG_CRIT,
+    FUSE_LOG_ERR,
+    FUSE_LOG_WARNING,
+    FUSE_LOG_NOTICE,
+    FUSE_LOG_INFO,
+    FUSE_LOG_DEBUG
 };
 
 /**
@@ -45,8 +45,8 @@ enum fuse_log_level {
  * @param fmt sprintf-style format string including newline
  * @param ap format string arguments
  */
-typedef void (*fuse_log_func_t)(enum fuse_log_level level,
-				const char *fmt, va_list ap);
+typedef void (*fuse_log_func_t)(enum fuse_log_level level, const char *fmt,
+                                va_list ap);
 
 /**
  * Install a custom log handler function.
diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
index ece00c219b..117298683a 100644
--- a/tools/virtiofsd/fuse_lowlevel.c
+++ b/tools/virtiofsd/fuse_lowlevel.c
@@ -1,2391 +1,2531 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  Implementation of (most of) the low-level FUSE API. The session loop
-  functions are implemented in separate files.
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * Implementation of (most of) the low-level FUSE API. The session loop
+ * functions are implemented in separate files.
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB
+ */
 
 #define _GNU_SOURCE
 
 #include "config.h"
 #include "fuse_i.h"
 #include "fuse_kernel.h"
-#include "fuse_opt.h"
 #include "fuse_misc.h"
+#include "fuse_opt.h"
 
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <stddef.h>
 #include <string.h>
-#include <unistd.h>
-#include <limits.h>
-#include <errno.h>
-#include <assert.h>
 #include <sys/file.h>
-
+#include <unistd.h>
 
 
 #define PARAM(inarg) (((char *)(inarg)) + sizeof(*(inarg)))
 #define OFFSET_MAX 0x7fffffffffffffffLL
 
-#define container_of(ptr, type, member) ({				\
-			const typeof( ((type *)0)->member ) *__mptr = (ptr); \
-			(type *)( (char *)__mptr - offsetof(type,member) );})
+#define container_of(ptr, type, member)                    \
+    ({                                                     \
+        const typeof(((type *)0)->member) *__mptr = (ptr); \
+        (type *)((char *)__mptr - offsetof(type, member)); \
+    })
 
 struct fuse_pollhandle {
-	uint64_t kh;
-	struct fuse_session *se;
+    uint64_t kh;
+    struct fuse_session *se;
 };
 
 static size_t pagesize;
 
 static __attribute__((constructor)) void fuse_ll_init_pagesize(void)
 {
-	pagesize = getpagesize();
+    pagesize = getpagesize();
 }
 
 static void convert_stat(const struct stat *stbuf, struct fuse_attr *attr)
 {
-	attr->ino	= stbuf->st_ino;
-	attr->mode	= stbuf->st_mode;
-	attr->nlink	= stbuf->st_nlink;
-	attr->uid	= stbuf->st_uid;
-	attr->gid	= stbuf->st_gid;
-	attr->rdev	= stbuf->st_rdev;
-	attr->size	= stbuf->st_size;
-	attr->blksize	= stbuf->st_blksize;
-	attr->blocks	= stbuf->st_blocks;
-	attr->atime	= stbuf->st_atime;
-	attr->mtime	= stbuf->st_mtime;
-	attr->ctime	= stbuf->st_ctime;
-	attr->atimensec = ST_ATIM_NSEC(stbuf);
-	attr->mtimensec = ST_MTIM_NSEC(stbuf);
-	attr->ctimensec = ST_CTIM_NSEC(stbuf);
+    attr->ino = stbuf->st_ino;
+    attr->mode = stbuf->st_mode;
+    attr->nlink = stbuf->st_nlink;
+    attr->uid = stbuf->st_uid;
+    attr->gid = stbuf->st_gid;
+    attr->rdev = stbuf->st_rdev;
+    attr->size = stbuf->st_size;
+    attr->blksize = stbuf->st_blksize;
+    attr->blocks = stbuf->st_blocks;
+    attr->atime = stbuf->st_atime;
+    attr->mtime = stbuf->st_mtime;
+    attr->ctime = stbuf->st_ctime;
+    attr->atimensec = ST_ATIM_NSEC(stbuf);
+    attr->mtimensec = ST_MTIM_NSEC(stbuf);
+    attr->ctimensec = ST_CTIM_NSEC(stbuf);
 }
 
 static void convert_attr(const struct fuse_setattr_in *attr, struct stat *stbuf)
 {
-	stbuf->st_mode	       = attr->mode;
-	stbuf->st_uid	       = attr->uid;
-	stbuf->st_gid	       = attr->gid;
-	stbuf->st_size	       = attr->size;
-	stbuf->st_atime	       = attr->atime;
-	stbuf->st_mtime	       = attr->mtime;
-	stbuf->st_ctime        = attr->ctime;
-	ST_ATIM_NSEC_SET(stbuf, attr->atimensec);
-	ST_MTIM_NSEC_SET(stbuf, attr->mtimensec);
-	ST_CTIM_NSEC_SET(stbuf, attr->ctimensec);
+    stbuf->st_mode = attr->mode;
+    stbuf->st_uid = attr->uid;
+    stbuf->st_gid = attr->gid;
+    stbuf->st_size = attr->size;
+    stbuf->st_atime = attr->atime;
+    stbuf->st_mtime = attr->mtime;
+    stbuf->st_ctime = attr->ctime;
+    ST_ATIM_NSEC_SET(stbuf, attr->atimensec);
+    ST_MTIM_NSEC_SET(stbuf, attr->mtimensec);
+    ST_CTIM_NSEC_SET(stbuf, attr->ctimensec);
 }
 
-static	size_t iov_length(const struct iovec *iov, size_t count)
+static size_t iov_length(const struct iovec *iov, size_t count)
 {
-	size_t seg;
-	size_t ret = 0;
+    size_t seg;
+    size_t ret = 0;
 
-	for (seg = 0; seg < count; seg++)
-		ret += iov[seg].iov_len;
-	return ret;
+    for (seg = 0; seg < count; seg++) {
+        ret += iov[seg].iov_len;
+    }
+    return ret;
 }
 
 static void list_init_req(struct fuse_req *req)
 {
-	req->next = req;
-	req->prev = req;
+    req->next = req;
+    req->prev = req;
 }
 
 static void list_del_req(struct fuse_req *req)
 {
-	struct fuse_req *prev = req->prev;
-	struct fuse_req *next = req->next;
-	prev->next = next;
-	next->prev = prev;
+    struct fuse_req *prev = req->prev;
+    struct fuse_req *next = req->next;
+    prev->next = next;
+    next->prev = prev;
 }
 
 static void list_add_req(struct fuse_req *req, struct fuse_req *next)
 {
-	struct fuse_req *prev = next->prev;
-	req->next = next;
-	req->prev = prev;
-	prev->next = req;
-	next->prev = req;
+    struct fuse_req *prev = next->prev;
+    req->next = next;
+    req->prev = prev;
+    prev->next = req;
+    next->prev = req;
 }
 
 static void destroy_req(fuse_req_t req)
 {
-	pthread_mutex_destroy(&req->lock);
-	free(req);
+    pthread_mutex_destroy(&req->lock);
+    free(req);
 }
 
 void fuse_free_req(fuse_req_t req)
 {
-	int ctr;
-	struct fuse_session *se = req->se;
+    int ctr;
+    struct fuse_session *se = req->se;
 
-	pthread_mutex_lock(&se->lock);
-	req->u.ni.func = NULL;
-	req->u.ni.data = NULL;
-	list_del_req(req);
-	ctr = --req->ctr;
-	req->ch = NULL;
-	pthread_mutex_unlock(&se->lock);
-	if (!ctr)
-		destroy_req(req);
+    pthread_mutex_lock(&se->lock);
+    req->u.ni.func = NULL;
+    req->u.ni.data = NULL;
+    list_del_req(req);
+    ctr = --req->ctr;
+    req->ch = NULL;
+    pthread_mutex_unlock(&se->lock);
+    if (!ctr) {
+        destroy_req(req);
+    }
 }
 
 static struct fuse_req *fuse_ll_alloc_req(struct fuse_session *se)
 {
-	struct fuse_req *req;
+    struct fuse_req *req;
 
-	req = (struct fuse_req *) calloc(1, sizeof(struct fuse_req));
-	if (req == NULL) {
-		fuse_log(FUSE_LOG_ERR, "fuse: failed to allocate request\n");
-	} else {
-		req->se = se;
-		req->ctr = 1;
-		list_init_req(req);
-		fuse_mutex_init(&req->lock);
-	}
+    req = (struct fuse_req *)calloc(1, sizeof(struct fuse_req));
+    if (req == NULL) {
+        fuse_log(FUSE_LOG_ERR, "fuse: failed to allocate request\n");
+    } else {
+        req->se = se;
+        req->ctr = 1;
+        list_init_req(req);
+        fuse_mutex_init(&req->lock);
+    }
 
-	return req;
+    return req;
 }
 
 /* Send data. If *ch* is NULL, send via session master fd */
 static int fuse_send_msg(struct fuse_session *se, struct fuse_chan *ch,
-			 struct iovec *iov, int count)
+                         struct iovec *iov, int count)
 {
-	struct fuse_out_header *out = iov[0].iov_base;
+    struct fuse_out_header *out = iov[0].iov_base;
 
-	out->len = iov_length(iov, count);
-	if (se->debug) {
-		if (out->unique == 0) {
-			fuse_log(FUSE_LOG_DEBUG, "NOTIFY: code=%d length=%u\n",
-				out->error, out->len);
-		} else if (out->error) {
-			fuse_log(FUSE_LOG_DEBUG,
-				"   unique: %llu, error: %i (%s), outsize: %i\n",
-				(unsigned long long) out->unique, out->error,
-				strerror(-out->error), out->len);
-		} else {
-			fuse_log(FUSE_LOG_DEBUG,
-				"   unique: %llu, success, outsize: %i\n",
-				(unsigned long long) out->unique, out->len);
-		}
-	}
+    out->len = iov_length(iov, count);
+    if (se->debug) {
+        if (out->unique == 0) {
+            fuse_log(FUSE_LOG_DEBUG, "NOTIFY: code=%d length=%u\n", out->error,
+                     out->len);
+        } else if (out->error) {
+            fuse_log(FUSE_LOG_DEBUG,
+                     "   unique: %llu, error: %i (%s), outsize: %i\n",
+                     (unsigned long long)out->unique, out->error,
+                     strerror(-out->error), out->len);
+        } else {
+            fuse_log(FUSE_LOG_DEBUG, "   unique: %llu, success, outsize: %i\n",
+                     (unsigned long long)out->unique, out->len);
+        }
+    }
 
-	abort(); /* virtio should have taken it before here */
-	return 0;
+    abort(); /* virtio should have taken it before here */
+    return 0;
 }
 
 
 int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
-			       int count)
+                               int count)
 {
-	struct fuse_out_header out;
+    struct fuse_out_header out;
 
-	if (error <= -1000 || error > 0) {
-		fuse_log(FUSE_LOG_ERR, "fuse: bad error value: %i\n",	error);
-		error = -ERANGE;
-	}
+    if (error <= -1000 || error > 0) {
+        fuse_log(FUSE_LOG_ERR, "fuse: bad error value: %i\n", error);
+        error = -ERANGE;
+    }
 
-	out.unique = req->unique;
-	out.error = error;
+    out.unique = req->unique;
+    out.error = error;
 
-	iov[0].iov_base = &out;
-	iov[0].iov_len = sizeof(struct fuse_out_header);
+    iov[0].iov_base = &out;
+    iov[0].iov_len = sizeof(struct fuse_out_header);
 
-	return fuse_send_msg(req->se, req->ch, iov, count);
+    return fuse_send_msg(req->se, req->ch, iov, count);
 }
 
 static int send_reply_iov(fuse_req_t req, int error, struct iovec *iov,
-			  int count)
+                          int count)
 {
-	int res;
+    int res;
 
-	res = fuse_send_reply_iov_nofree(req, error, iov, count);
-	fuse_free_req(req);
-	return res;
+    res = fuse_send_reply_iov_nofree(req, error, iov, count);
+    fuse_free_req(req);
+    return res;
 }
 
 static int send_reply(fuse_req_t req, int error, const void *arg,
-		      size_t argsize)
+                      size_t argsize)
 {
-	struct iovec iov[2];
-	int count = 1;
-	if (argsize) {
-		iov[1].iov_base = (void *) arg;
-		iov[1].iov_len = argsize;
-		count++;
-	}
-	return send_reply_iov(req, error, iov, count);
+    struct iovec iov[2];
+    int count = 1;
+    if (argsize) {
+        iov[1].iov_base = (void *)arg;
+        iov[1].iov_len = argsize;
+        count++;
+    }
+    return send_reply_iov(req, error, iov, count);
 }
 
 int fuse_reply_iov(fuse_req_t req, const struct iovec *iov, int count)
 {
-	int res;
-	struct iovec *padded_iov;
+    int res;
+    struct iovec *padded_iov;
 
-	padded_iov = malloc((count + 1) * sizeof(struct iovec));
-	if (padded_iov == NULL)
-		return fuse_reply_err(req, ENOMEM);
+    padded_iov = malloc((count + 1) * sizeof(struct iovec));
+    if (padded_iov == NULL) {
+        return fuse_reply_err(req, ENOMEM);
+    }
 
-	memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
-	count++;
+    memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
+    count++;
 
-	res = send_reply_iov(req, 0, padded_iov, count);
-	free(padded_iov);
+    res = send_reply_iov(req, 0, padded_iov, count);
+    free(padded_iov);
 
-	return res;
+    return res;
 }
 
 
-/* `buf` is allowed to be empty so that the proper size may be
-   allocated by the caller */
+/*
+ * 'buf` is allowed to be empty so that the proper size may be
+ * allocated by the caller
+ */
 size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize,
-			 const char *name, const struct stat *stbuf, off_t off)
+                         const char *name, const struct stat *stbuf, off_t off)
 {
-	(void)req;
-	size_t namelen;
-	size_t entlen;
-	size_t entlen_padded;
-	struct fuse_dirent *dirent;
+    (void)req;
+    size_t namelen;
+    size_t entlen;
+    size_t entlen_padded;
+    struct fuse_dirent *dirent;
 
-	namelen = strlen(name);
-	entlen = FUSE_NAME_OFFSET + namelen;
-	entlen_padded = FUSE_DIRENT_ALIGN(entlen);
+    namelen = strlen(name);
+    entlen = FUSE_NAME_OFFSET + namelen;
+    entlen_padded = FUSE_DIRENT_ALIGN(entlen);
 
-	if ((buf == NULL) || (entlen_padded > bufsize))
-	  return entlen_padded;
+    if ((buf == NULL) || (entlen_padded > bufsize)) {
+        return entlen_padded;
+    }
 
-	dirent = (struct fuse_dirent*) buf;
-	dirent->ino = stbuf->st_ino;
-	dirent->off = off;
-	dirent->namelen = namelen;
-	dirent->type = (stbuf->st_mode & S_IFMT) >> 12;
-	memcpy(dirent->name, name, namelen);
-	memset(dirent->name + namelen, 0, entlen_padded - entlen);
+    dirent = (struct fuse_dirent *)buf;
+    dirent->ino = stbuf->st_ino;
+    dirent->off = off;
+    dirent->namelen = namelen;
+    dirent->type = (stbuf->st_mode & S_IFMT) >> 12;
+    memcpy(dirent->name, name, namelen);
+    memset(dirent->name + namelen, 0, entlen_padded - entlen);
 
-	return entlen_padded;
+    return entlen_padded;
 }
 
 static void convert_statfs(const struct statvfs *stbuf,
-			   struct fuse_kstatfs *kstatfs)
+                           struct fuse_kstatfs *kstatfs)
 {
-	kstatfs->bsize	 = stbuf->f_bsize;
-	kstatfs->frsize	 = stbuf->f_frsize;
-	kstatfs->blocks	 = stbuf->f_blocks;
-	kstatfs->bfree	 = stbuf->f_bfree;
-	kstatfs->bavail	 = stbuf->f_bavail;
-	kstatfs->files	 = stbuf->f_files;
-	kstatfs->ffree	 = stbuf->f_ffree;
-	kstatfs->namelen = stbuf->f_namemax;
+    kstatfs->bsize = stbuf->f_bsize;
+    kstatfs->frsize = stbuf->f_frsize;
+    kstatfs->blocks = stbuf->f_blocks;
+    kstatfs->bfree = stbuf->f_bfree;
+    kstatfs->bavail = stbuf->f_bavail;
+    kstatfs->files = stbuf->f_files;
+    kstatfs->ffree = stbuf->f_ffree;
+    kstatfs->namelen = stbuf->f_namemax;
 }
 
 static int send_reply_ok(fuse_req_t req, const void *arg, size_t argsize)
 {
-	return send_reply(req, 0, arg, argsize);
+    return send_reply(req, 0, arg, argsize);
 }
 
 int fuse_reply_err(fuse_req_t req, int err)
 {
-	return send_reply(req, -err, NULL, 0);
+    return send_reply(req, -err, NULL, 0);
 }
 
 void fuse_reply_none(fuse_req_t req)
 {
-	fuse_free_req(req);
+    fuse_free_req(req);
 }
 
 static unsigned long calc_timeout_sec(double t)
 {
-	if (t > (double) ULONG_MAX)
-		return ULONG_MAX;
-	else if (t < 0.0)
-		return 0;
-	else
-		return (unsigned long) t;
+    if (t > (double)ULONG_MAX) {
+        return ULONG_MAX;
+    } else if (t < 0.0) {
+        return 0;
+    } else {
+        return (unsigned long)t;
+    }
 }
 
 static unsigned int calc_timeout_nsec(double t)
 {
-	double f = t - (double) calc_timeout_sec(t);
-	if (f < 0.0)
-		return 0;
-	else if (f >= 0.999999999)
-		return 999999999;
-	else
-		return (unsigned int) (f * 1.0e9);
+    double f = t - (double)calc_timeout_sec(t);
+    if (f < 0.0) {
+        return 0;
+    } else if (f >= 0.999999999) {
+        return 999999999;
+    } else {
+        return (unsigned int)(f * 1.0e9);
+    }
 }
 
 static void fill_entry(struct fuse_entry_out *arg,
-		       const struct fuse_entry_param *e)
+                       const struct fuse_entry_param *e)
 {
-	arg->nodeid = e->ino;
-	arg->generation = e->generation;
-	arg->entry_valid = calc_timeout_sec(e->entry_timeout);
-	arg->entry_valid_nsec = calc_timeout_nsec(e->entry_timeout);
-	arg->attr_valid = calc_timeout_sec(e->attr_timeout);
-	arg->attr_valid_nsec = calc_timeout_nsec(e->attr_timeout);
-	convert_stat(&e->attr, &arg->attr);
+    arg->nodeid = e->ino;
+    arg->generation = e->generation;
+    arg->entry_valid = calc_timeout_sec(e->entry_timeout);
+    arg->entry_valid_nsec = calc_timeout_nsec(e->entry_timeout);
+    arg->attr_valid = calc_timeout_sec(e->attr_timeout);
+    arg->attr_valid_nsec = calc_timeout_nsec(e->attr_timeout);
+    convert_stat(&e->attr, &arg->attr);
 }
 
-/* `buf` is allowed to be empty so that the proper size may be
-   allocated by the caller */
+/*
+ * `buf` is allowed to be empty so that the proper size may be
+ * allocated by the caller
+ */
 size_t fuse_add_direntry_plus(fuse_req_t req, char *buf, size_t bufsize,
-			      const char *name,
-			      const struct fuse_entry_param *e, off_t off)
-{
-	(void)req;
-	size_t namelen;
-	size_t entlen;
-	size_t entlen_padded;
-
-	namelen = strlen(name);
-	entlen = FUSE_NAME_OFFSET_DIRENTPLUS + namelen;
-	entlen_padded = FUSE_DIRENT_ALIGN(entlen);
-	if ((buf == NULL) || (entlen_padded > bufsize))
-	  return entlen_padded;
-
-	struct fuse_direntplus *dp = (struct fuse_direntplus *) buf;
-	memset(&dp->entry_out, 0, sizeof(dp->entry_out));
-	fill_entry(&dp->entry_out, e);
-
-	struct fuse_dirent *dirent = &dp->dirent;
-	dirent->ino = e->attr.st_ino;
-	dirent->off = off;
-	dirent->namelen = namelen;
-	dirent->type = (e->attr.st_mode & S_IFMT) >> 12;
-	memcpy(dirent->name, name, namelen);
-	memset(dirent->name + namelen, 0, entlen_padded - entlen);
-
-	return entlen_padded;
-}
-
-static void fill_open(struct fuse_open_out *arg,
-		      const struct fuse_file_info *f)
-{
-	arg->fh = f->fh;
-	if (f->direct_io)
-		arg->open_flags |= FOPEN_DIRECT_IO;
-	if (f->keep_cache)
-		arg->open_flags |= FOPEN_KEEP_CACHE;
-	if (f->cache_readdir)
-		arg->open_flags |= FOPEN_CACHE_DIR;
-	if (f->nonseekable)
-		arg->open_flags |= FOPEN_NONSEEKABLE;
+                              const char *name,
+                              const struct fuse_entry_param *e, off_t off)
+{
+    (void)req;
+    size_t namelen;
+    size_t entlen;
+    size_t entlen_padded;
+
+    namelen = strlen(name);
+    entlen = FUSE_NAME_OFFSET_DIRENTPLUS + namelen;
+    entlen_padded = FUSE_DIRENT_ALIGN(entlen);
+    if ((buf == NULL) || (entlen_padded > bufsize)) {
+        return entlen_padded;
+    }
+
+    struct fuse_direntplus *dp = (struct fuse_direntplus *)buf;
+    memset(&dp->entry_out, 0, sizeof(dp->entry_out));
+    fill_entry(&dp->entry_out, e);
+
+    struct fuse_dirent *dirent = &dp->dirent;
+    dirent->ino = e->attr.st_ino;
+    dirent->off = off;
+    dirent->namelen = namelen;
+    dirent->type = (e->attr.st_mode & S_IFMT) >> 12;
+    memcpy(dirent->name, name, namelen);
+    memset(dirent->name + namelen, 0, entlen_padded - entlen);
+
+    return entlen_padded;
+}
+
+static void fill_open(struct fuse_open_out *arg, const struct fuse_file_info *f)
+{
+    arg->fh = f->fh;
+    if (f->direct_io) {
+        arg->open_flags |= FOPEN_DIRECT_IO;
+    }
+    if (f->keep_cache) {
+        arg->open_flags |= FOPEN_KEEP_CACHE;
+    }
+    if (f->cache_readdir) {
+        arg->open_flags |= FOPEN_CACHE_DIR;
+    }
+    if (f->nonseekable) {
+        arg->open_flags |= FOPEN_NONSEEKABLE;
+    }
 }
 
 int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
 {
-	struct fuse_entry_out arg;
-	size_t size = req->se->conn.proto_minor < 9 ?
-		FUSE_COMPAT_ENTRY_OUT_SIZE : sizeof(arg);
+    struct fuse_entry_out arg;
+    size_t size = req->se->conn.proto_minor < 9 ? FUSE_COMPAT_ENTRY_OUT_SIZE :
+                                                  sizeof(arg);
 
-	/* before ABI 7.4 e->ino == 0 was invalid, only ENOENT meant
-	   negative entry */
-	if (!e->ino && req->se->conn.proto_minor < 4)
-		return fuse_reply_err(req, ENOENT);
+    /*
+     * before ABI 7.4 e->ino == 0 was invalid, only ENOENT meant
+     * negative entry
+     */
+    if (!e->ino && req->se->conn.proto_minor < 4) {
+        return fuse_reply_err(req, ENOENT);
+    }
 
-	memset(&arg, 0, sizeof(arg));
-	fill_entry(&arg, e);
-	return send_reply_ok(req, &arg, size);
+    memset(&arg, 0, sizeof(arg));
+    fill_entry(&arg, e);
+    return send_reply_ok(req, &arg, size);
 }
 
 int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
-		      const struct fuse_file_info *f)
+                      const struct fuse_file_info *f)
 {
-	char buf[sizeof(struct fuse_entry_out) + sizeof(struct fuse_open_out)];
-	size_t entrysize = req->se->conn.proto_minor < 9 ?
-		FUSE_COMPAT_ENTRY_OUT_SIZE : sizeof(struct fuse_entry_out);
-	struct fuse_entry_out *earg = (struct fuse_entry_out *) buf;
-	struct fuse_open_out *oarg = (struct fuse_open_out *) (buf + entrysize);
+    char buf[sizeof(struct fuse_entry_out) + sizeof(struct fuse_open_out)];
+    size_t entrysize = req->se->conn.proto_minor < 9 ?
+                           FUSE_COMPAT_ENTRY_OUT_SIZE :
+                           sizeof(struct fuse_entry_out);
+    struct fuse_entry_out *earg = (struct fuse_entry_out *)buf;
+    struct fuse_open_out *oarg = (struct fuse_open_out *)(buf + entrysize);
 
-	memset(buf, 0, sizeof(buf));
-	fill_entry(earg, e);
-	fill_open(oarg, f);
-	return send_reply_ok(req, buf,
-			     entrysize + sizeof(struct fuse_open_out));
+    memset(buf, 0, sizeof(buf));
+    fill_entry(earg, e);
+    fill_open(oarg, f);
+    return send_reply_ok(req, buf, entrysize + sizeof(struct fuse_open_out));
 }
 
 int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
-		    double attr_timeout)
+                    double attr_timeout)
 {
-	struct fuse_attr_out arg;
-	size_t size = req->se->conn.proto_minor < 9 ?
-		FUSE_COMPAT_ATTR_OUT_SIZE : sizeof(arg);
+    struct fuse_attr_out arg;
+    size_t size =
+        req->se->conn.proto_minor < 9 ? FUSE_COMPAT_ATTR_OUT_SIZE : sizeof(arg);
 
-	memset(&arg, 0, sizeof(arg));
-	arg.attr_valid = calc_timeout_sec(attr_timeout);
-	arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout);
-	convert_stat(attr, &arg.attr);
+    memset(&arg, 0, sizeof(arg));
+    arg.attr_valid = calc_timeout_sec(attr_timeout);
+    arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout);
+    convert_stat(attr, &arg.attr);
 
-	return send_reply_ok(req, &arg, size);
+    return send_reply_ok(req, &arg, size);
 }
 
 int fuse_reply_readlink(fuse_req_t req, const char *linkname)
 {
-	return send_reply_ok(req, linkname, strlen(linkname));
+    return send_reply_ok(req, linkname, strlen(linkname));
 }
 
 int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *f)
 {
-	struct fuse_open_out arg;
+    struct fuse_open_out arg;
 
-	memset(&arg, 0, sizeof(arg));
-	fill_open(&arg, f);
-	return send_reply_ok(req, &arg, sizeof(arg));
+    memset(&arg, 0, sizeof(arg));
+    fill_open(&arg, f);
+    return send_reply_ok(req, &arg, sizeof(arg));
 }
 
 int fuse_reply_write(fuse_req_t req, size_t count)
 {
-	struct fuse_write_out arg;
+    struct fuse_write_out arg;
 
-	memset(&arg, 0, sizeof(arg));
-	arg.size = count;
+    memset(&arg, 0, sizeof(arg));
+    arg.size = count;
 
-	return send_reply_ok(req, &arg, sizeof(arg));
+    return send_reply_ok(req, &arg, sizeof(arg));
 }
 
 int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
 {
-	return send_reply_ok(req, buf, size);
+    return send_reply_ok(req, buf, size);
 }
 
 static int fuse_send_data_iov_fallback(struct fuse_session *se,
-				       struct fuse_chan *ch,
-				       struct iovec *iov, int iov_count,
-				       struct fuse_bufvec *buf,
-				       size_t len)
+                                       struct fuse_chan *ch, struct iovec *iov,
+                                       int iov_count, struct fuse_bufvec *buf,
+                                       size_t len)
 {
-	/* Optimize common case */
-	if (buf->count == 1 && buf->idx == 0 && buf->off == 0 &&
-	    !(buf->buf[0].flags & FUSE_BUF_IS_FD)) {
-		/* FIXME: also avoid memory copy if there are multiple buffers
-		   but none of them contain an fd */
+    /* Optimize common case */
+    if (buf->count == 1 && buf->idx == 0 && buf->off == 0 &&
+        !(buf->buf[0].flags & FUSE_BUF_IS_FD)) {
+        /*
+         * FIXME: also avoid memory copy if there are multiple buffers
+         * but none of them contain an fd
+         */
 
-		iov[iov_count].iov_base = buf->buf[0].mem;
-		iov[iov_count].iov_len = len;
-		iov_count++;
-		return fuse_send_msg(se, ch, iov, iov_count);
-	}
+        iov[iov_count].iov_base = buf->buf[0].mem;
+        iov[iov_count].iov_len = len;
+        iov_count++;
+        return fuse_send_msg(se, ch, iov, iov_count);
+    }
 
-	abort(); /* Will have taken vhost path */
-	return 0;
+    abort(); /* Will have taken vhost path */
+    return 0;
 }
 
 static int fuse_send_data_iov(struct fuse_session *se, struct fuse_chan *ch,
-			       struct iovec *iov, int iov_count,
-			       struct fuse_bufvec *buf, unsigned int flags)
+                              struct iovec *iov, int iov_count,
+                              struct fuse_bufvec *buf, unsigned int flags)
 {
-	size_t len = fuse_buf_size(buf);
-	(void) flags;
+    size_t len = fuse_buf_size(buf);
+    (void)flags;
 
-	return fuse_send_data_iov_fallback(se, ch, iov, iov_count, buf, len);
+    return fuse_send_data_iov_fallback(se, ch, iov, iov_count, buf, len);
 }
 
 int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
-		    enum fuse_buf_copy_flags flags)
+                    enum fuse_buf_copy_flags flags)
 {
-	struct iovec iov[2];
-	struct fuse_out_header out;
-	int res;
+    struct iovec iov[2];
+    struct fuse_out_header out;
+    int res;
 
-	iov[0].iov_base = &out;
-	iov[0].iov_len = sizeof(struct fuse_out_header);
+    iov[0].iov_base = &out;
+    iov[0].iov_len = sizeof(struct fuse_out_header);
 
-	out.unique = req->unique;
-	out.error = 0;
+    out.unique = req->unique;
+    out.error = 0;
 
-	res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv, flags);
-	if (res <= 0) {
-		fuse_free_req(req);
-		return res;
-	} else {
-		return fuse_reply_err(req, res);
-	}
+    res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv, flags);
+    if (res <= 0) {
+        fuse_free_req(req);
+        return res;
+    } else {
+        return fuse_reply_err(req, res);
+    }
 }
 
 int fuse_reply_statfs(fuse_req_t req, const struct statvfs *stbuf)
 {
-	struct fuse_statfs_out arg;
-	size_t size = req->se->conn.proto_minor < 4 ?
-		FUSE_COMPAT_STATFS_SIZE : sizeof(arg);
+    struct fuse_statfs_out arg;
+    size_t size =
+        req->se->conn.proto_minor < 4 ? FUSE_COMPAT_STATFS_SIZE : sizeof(arg);
 
-	memset(&arg, 0, sizeof(arg));
-	convert_statfs(stbuf, &arg.st);
+    memset(&arg, 0, sizeof(arg));
+    convert_statfs(stbuf, &arg.st);
 
-	return send_reply_ok(req, &arg, size);
+    return send_reply_ok(req, &arg, size);
 }
 
 int fuse_reply_xattr(fuse_req_t req, size_t count)
 {
-	struct fuse_getxattr_out arg;
+    struct fuse_getxattr_out arg;
 
-	memset(&arg, 0, sizeof(arg));
-	arg.size = count;
+    memset(&arg, 0, sizeof(arg));
+    arg.size = count;
 
-	return send_reply_ok(req, &arg, sizeof(arg));
+    return send_reply_ok(req, &arg, sizeof(arg));
 }
 
 int fuse_reply_lock(fuse_req_t req, const struct flock *lock)
 {
-	struct fuse_lk_out arg;
+    struct fuse_lk_out arg;
 
-	memset(&arg, 0, sizeof(arg));
-	arg.lk.type = lock->l_type;
-	if (lock->l_type != F_UNLCK) {
-		arg.lk.start = lock->l_start;
-		if (lock->l_len == 0)
-			arg.lk.end = OFFSET_MAX;
-		else
-			arg.lk.end = lock->l_start + lock->l_len - 1;
-	}
-	arg.lk.pid = lock->l_pid;
-	return send_reply_ok(req, &arg, sizeof(arg));
+    memset(&arg, 0, sizeof(arg));
+    arg.lk.type = lock->l_type;
+    if (lock->l_type != F_UNLCK) {
+        arg.lk.start = lock->l_start;
+        if (lock->l_len == 0) {
+            arg.lk.end = OFFSET_MAX;
+        } else {
+            arg.lk.end = lock->l_start + lock->l_len - 1;
+        }
+    }
+    arg.lk.pid = lock->l_pid;
+    return send_reply_ok(req, &arg, sizeof(arg));
 }
 
 int fuse_reply_bmap(fuse_req_t req, uint64_t idx)
 {
-	struct fuse_bmap_out arg;
+    struct fuse_bmap_out arg;
 
-	memset(&arg, 0, sizeof(arg));
-	arg.block = idx;
+    memset(&arg, 0, sizeof(arg));
+    arg.block = idx;
 
-	return send_reply_ok(req, &arg, sizeof(arg));
+    return send_reply_ok(req, &arg, sizeof(arg));
 }
 
 static struct fuse_ioctl_iovec *fuse_ioctl_iovec_copy(const struct iovec *iov,
-						      size_t count)
-{
-	struct fuse_ioctl_iovec *fiov;
-	size_t i;
-
-	fiov = malloc(sizeof(fiov[0]) * count);
-	if (!fiov)
-		return NULL;
-
-	for (i = 0; i < count; i++) {
-		fiov[i].base = (uintptr_t) iov[i].iov_base;
-		fiov[i].len = iov[i].iov_len;
-	}
-
-	return fiov;
-}
-
-int fuse_reply_ioctl_retry(fuse_req_t req,
-			   const struct iovec *in_iov, size_t in_count,
-			   const struct iovec *out_iov, size_t out_count)
-{
-	struct fuse_ioctl_out arg;
-	struct fuse_ioctl_iovec *in_fiov = NULL;
-	struct fuse_ioctl_iovec *out_fiov = NULL;
-	struct iovec iov[4];
-	size_t count = 1;
-	int res;
-
-	memset(&arg, 0, sizeof(arg));
-	arg.flags |= FUSE_IOCTL_RETRY;
-	arg.in_iovs = in_count;
-	arg.out_iovs = out_count;
-	iov[count].iov_base = &arg;
-	iov[count].iov_len = sizeof(arg);
-	count++;
-
-	if (req->se->conn.proto_minor < 16) {
-		if (in_count) {
-			iov[count].iov_base = (void *)in_iov;
-			iov[count].iov_len = sizeof(in_iov[0]) * in_count;
-			count++;
-		}
-
-		if (out_count) {
-			iov[count].iov_base = (void *)out_iov;
-			iov[count].iov_len = sizeof(out_iov[0]) * out_count;
-			count++;
-		}
-	} else {
-		/* Can't handle non-compat 64bit ioctls on 32bit */
-		if (sizeof(void *) == 4 && req->ioctl_64bit) {
-			res = fuse_reply_err(req, EINVAL);
-			goto out;
-		}
-
-		if (in_count) {
-			in_fiov = fuse_ioctl_iovec_copy(in_iov, in_count);
-			if (!in_fiov)
-				goto enomem;
-
-			iov[count].iov_base = (void *)in_fiov;
-			iov[count].iov_len = sizeof(in_fiov[0]) * in_count;
-			count++;
-		}
-		if (out_count) {
-			out_fiov = fuse_ioctl_iovec_copy(out_iov, out_count);
-			if (!out_fiov)
-				goto enomem;
-
-			iov[count].iov_base = (void *)out_fiov;
-			iov[count].iov_len = sizeof(out_fiov[0]) * out_count;
-			count++;
-		}
-	}
-
-	res = send_reply_iov(req, 0, iov, count);
+                                                      size_t count)
+{
+    struct fuse_ioctl_iovec *fiov;
+    size_t i;
+
+    fiov = malloc(sizeof(fiov[0]) * count);
+    if (!fiov) {
+        return NULL;
+    }
+
+    for (i = 0; i < count; i++) {
+        fiov[i].base = (uintptr_t)iov[i].iov_base;
+        fiov[i].len = iov[i].iov_len;
+    }
+
+    return fiov;
+}
+
+int fuse_reply_ioctl_retry(fuse_req_t req, const struct iovec *in_iov,
+                           size_t in_count, const struct iovec *out_iov,
+                           size_t out_count)
+{
+    struct fuse_ioctl_out arg;
+    struct fuse_ioctl_iovec *in_fiov = NULL;
+    struct fuse_ioctl_iovec *out_fiov = NULL;
+    struct iovec iov[4];
+    size_t count = 1;
+    int res;
+
+    memset(&arg, 0, sizeof(arg));
+    arg.flags |= FUSE_IOCTL_RETRY;
+    arg.in_iovs = in_count;
+    arg.out_iovs = out_count;
+    iov[count].iov_base = &arg;
+    iov[count].iov_len = sizeof(arg);
+    count++;
+
+    if (req->se->conn.proto_minor < 16) {
+        if (in_count) {
+            iov[count].iov_base = (void *)in_iov;
+            iov[count].iov_len = sizeof(in_iov[0]) * in_count;
+            count++;
+        }
+
+        if (out_count) {
+            iov[count].iov_base = (void *)out_iov;
+            iov[count].iov_len = sizeof(out_iov[0]) * out_count;
+            count++;
+        }
+    } else {
+        /* Can't handle non-compat 64bit ioctls on 32bit */
+        if (sizeof(void *) == 4 && req->ioctl_64bit) {
+            res = fuse_reply_err(req, EINVAL);
+            goto out;
+        }
+
+        if (in_count) {
+            in_fiov = fuse_ioctl_iovec_copy(in_iov, in_count);
+            if (!in_fiov) {
+                goto enomem;
+            }
+
+            iov[count].iov_base = (void *)in_fiov;
+            iov[count].iov_len = sizeof(in_fiov[0]) * in_count;
+            count++;
+        }
+        if (out_count) {
+            out_fiov = fuse_ioctl_iovec_copy(out_iov, out_count);
+            if (!out_fiov) {
+                goto enomem;
+            }
+
+            iov[count].iov_base = (void *)out_fiov;
+            iov[count].iov_len = sizeof(out_fiov[0]) * out_count;
+            count++;
+        }
+    }
+
+    res = send_reply_iov(req, 0, iov, count);
 out:
-	free(in_fiov);
-	free(out_fiov);
+    free(in_fiov);
+    free(out_fiov);
 
-	return res;
+    return res;
 
 enomem:
-	res = fuse_reply_err(req, ENOMEM);
-	goto out;
+    res = fuse_reply_err(req, ENOMEM);
+    goto out;
 }
 
 int fuse_reply_ioctl(fuse_req_t req, int result, const void *buf, size_t size)
 {
-	struct fuse_ioctl_out arg;
-	struct iovec iov[3];
-	size_t count = 1;
+    struct fuse_ioctl_out arg;
+    struct iovec iov[3];
+    size_t count = 1;
 
-	memset(&arg, 0, sizeof(arg));
-	arg.result = result;
-	iov[count].iov_base = &arg;
-	iov[count].iov_len = sizeof(arg);
-	count++;
+    memset(&arg, 0, sizeof(arg));
+    arg.result = result;
+    iov[count].iov_base = &arg;
+    iov[count].iov_len = sizeof(arg);
+    count++;
 
-	if (size) {
-		iov[count].iov_base = (char *) buf;
-		iov[count].iov_len = size;
-		count++;
-	}
+    if (size) {
+        iov[count].iov_base = (char *)buf;
+        iov[count].iov_len = size;
+        count++;
+    }
 
-	return send_reply_iov(req, 0, iov, count);
+    return send_reply_iov(req, 0, iov, count);
 }
 
 int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov,
-			 int count)
+                         int count)
 {
-	struct iovec *padded_iov;
-	struct fuse_ioctl_out arg;
-	int res;
+    struct iovec *padded_iov;
+    struct fuse_ioctl_out arg;
+    int res;
 
-	padded_iov = malloc((count + 2) * sizeof(struct iovec));
-	if (padded_iov == NULL)
-		return fuse_reply_err(req, ENOMEM);
+    padded_iov = malloc((count + 2) * sizeof(struct iovec));
+    if (padded_iov == NULL) {
+        return fuse_reply_err(req, ENOMEM);
+    }
 
-	memset(&arg, 0, sizeof(arg));
-	arg.result = result;
-	padded_iov[1].iov_base = &arg;
-	padded_iov[1].iov_len = sizeof(arg);
+    memset(&arg, 0, sizeof(arg));
+    arg.result = result;
+    padded_iov[1].iov_base = &arg;
+    padded_iov[1].iov_len = sizeof(arg);
 
-	memcpy(&padded_iov[2], iov, count * sizeof(struct iovec));
+    memcpy(&padded_iov[2], iov, count * sizeof(struct iovec));
 
-	res = send_reply_iov(req, 0, padded_iov, count + 2);
-	free(padded_iov);
+    res = send_reply_iov(req, 0, padded_iov, count + 2);
+    free(padded_iov);
 
-	return res;
+    return res;
 }
 
 int fuse_reply_poll(fuse_req_t req, unsigned revents)
 {
-	struct fuse_poll_out arg;
+    struct fuse_poll_out arg;
 
-	memset(&arg, 0, sizeof(arg));
-	arg.revents = revents;
+    memset(&arg, 0, sizeof(arg));
+    arg.revents = revents;
 
-	return send_reply_ok(req, &arg, sizeof(arg));
+    return send_reply_ok(req, &arg, sizeof(arg));
 }
 
 int fuse_reply_lseek(fuse_req_t req, off_t off)
 {
-	struct fuse_lseek_out arg;
+    struct fuse_lseek_out arg;
 
-	memset(&arg, 0, sizeof(arg));
-	arg.offset = off;
+    memset(&arg, 0, sizeof(arg));
+    arg.offset = off;
 
-	return send_reply_ok(req, &arg, sizeof(arg));
+    return send_reply_ok(req, &arg, sizeof(arg));
 }
 
 static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	char *name = (char *) inarg;
+    char *name = (char *)inarg;
 
-	if (req->se->op.lookup)
-		req->se->op.lookup(req, nodeid, name);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.lookup) {
+        req->se->op.lookup(req, nodeid, name);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_forget(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_forget_in *arg = (struct fuse_forget_in *) inarg;
+    struct fuse_forget_in *arg = (struct fuse_forget_in *)inarg;
 
-	if (req->se->op.forget)
-		req->se->op.forget(req, nodeid, arg->nlookup);
-	else
-		fuse_reply_none(req);
+    if (req->se->op.forget) {
+        req->se->op.forget(req, nodeid, arg->nlookup);
+    } else {
+        fuse_reply_none(req);
+    }
 }
 
 static void do_batch_forget(fuse_req_t req, fuse_ino_t nodeid,
-			    const void *inarg)
+                            const void *inarg)
 {
-	struct fuse_batch_forget_in *arg = (void *) inarg;
-	struct fuse_forget_one *param = (void *) PARAM(arg);
-	unsigned int i;
+    struct fuse_batch_forget_in *arg = (void *)inarg;
+    struct fuse_forget_one *param = (void *)PARAM(arg);
+    unsigned int i;
 
-	(void) nodeid;
+    (void)nodeid;
 
-	if (req->se->op.forget_multi) {
-		req->se->op.forget_multi(req, arg->count,
-				     (struct fuse_forget_data *) param);
-	} else if (req->se->op.forget) {
-		for (i = 0; i < arg->count; i++) {
-			struct fuse_forget_one *forget = &param[i];
-			struct fuse_req *dummy_req;
+    if (req->se->op.forget_multi) {
+        req->se->op.forget_multi(req, arg->count,
+                                 (struct fuse_forget_data *)param);
+    } else if (req->se->op.forget) {
+        for (i = 0; i < arg->count; i++) {
+            struct fuse_forget_one *forget = &param[i];
+            struct fuse_req *dummy_req;
 
-			dummy_req = fuse_ll_alloc_req(req->se);
-			if (dummy_req == NULL)
-				break;
+            dummy_req = fuse_ll_alloc_req(req->se);
+            if (dummy_req == NULL) {
+                break;
+            }
 
-			dummy_req->unique = req->unique;
-			dummy_req->ctx = req->ctx;
-			dummy_req->ch = NULL;
+            dummy_req->unique = req->unique;
+            dummy_req->ctx = req->ctx;
+            dummy_req->ch = NULL;
 
-			req->se->op.forget(dummy_req, forget->nodeid,
-					  forget->nlookup);
-		}
-		fuse_reply_none(req);
-	} else {
-		fuse_reply_none(req);
-	}
+            req->se->op.forget(dummy_req, forget->nodeid, forget->nlookup);
+        }
+        fuse_reply_none(req);
+    } else {
+        fuse_reply_none(req);
+    }
 }
 
 static void do_getattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_file_info *fip = NULL;
-	struct fuse_file_info fi;
+    struct fuse_file_info *fip = NULL;
+    struct fuse_file_info fi;
 
-	if (req->se->conn.proto_minor >= 9) {
-		struct fuse_getattr_in *arg = (struct fuse_getattr_in *) inarg;
+    if (req->se->conn.proto_minor >= 9) {
+        struct fuse_getattr_in *arg = (struct fuse_getattr_in *)inarg;
 
-		if (arg->getattr_flags & FUSE_GETATTR_FH) {
-			memset(&fi, 0, sizeof(fi));
-			fi.fh = arg->fh;
-			fip = &fi;
-		}
-	}
+        if (arg->getattr_flags & FUSE_GETATTR_FH) {
+            memset(&fi, 0, sizeof(fi));
+            fi.fh = arg->fh;
+            fip = &fi;
+        }
+    }
 
-	if (req->se->op.getattr)
-		req->se->op.getattr(req, nodeid, fip);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.getattr) {
+        req->se->op.getattr(req, nodeid, fip);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_setattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_setattr_in *arg = (struct fuse_setattr_in *) inarg;
-
-	if (req->se->op.setattr) {
-		struct fuse_file_info *fi = NULL;
-		struct fuse_file_info fi_store;
-		struct stat stbuf;
-		memset(&stbuf, 0, sizeof(stbuf));
-		convert_attr(arg, &stbuf);
-		if (arg->valid & FATTR_FH) {
-			arg->valid &= ~FATTR_FH;
-			memset(&fi_store, 0, sizeof(fi_store));
-			fi = &fi_store;
-			fi->fh = arg->fh;
-		}
-		arg->valid &=
-			FUSE_SET_ATTR_MODE	|
-			FUSE_SET_ATTR_UID	|
-			FUSE_SET_ATTR_GID	|
-			FUSE_SET_ATTR_SIZE	|
-			FUSE_SET_ATTR_ATIME	|
-			FUSE_SET_ATTR_MTIME	|
-			FUSE_SET_ATTR_ATIME_NOW	|
-			FUSE_SET_ATTR_MTIME_NOW |
-			FUSE_SET_ATTR_CTIME;
-
-		req->se->op.setattr(req, nodeid, &stbuf, arg->valid, fi);
-	} else
-		fuse_reply_err(req, ENOSYS);
+    struct fuse_setattr_in *arg = (struct fuse_setattr_in *)inarg;
+
+    if (req->se->op.setattr) {
+        struct fuse_file_info *fi = NULL;
+        struct fuse_file_info fi_store;
+        struct stat stbuf;
+        memset(&stbuf, 0, sizeof(stbuf));
+        convert_attr(arg, &stbuf);
+        if (arg->valid & FATTR_FH) {
+            arg->valid &= ~FATTR_FH;
+            memset(&fi_store, 0, sizeof(fi_store));
+            fi = &fi_store;
+            fi->fh = arg->fh;
+        }
+        arg->valid &= FUSE_SET_ATTR_MODE | FUSE_SET_ATTR_UID |
+                      FUSE_SET_ATTR_GID | FUSE_SET_ATTR_SIZE |
+                      FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME |
+                      FUSE_SET_ATTR_ATIME_NOW | FUSE_SET_ATTR_MTIME_NOW |
+                      FUSE_SET_ATTR_CTIME;
+
+        req->se->op.setattr(req, nodeid, &stbuf, arg->valid, fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_access(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_access_in *arg = (struct fuse_access_in *) inarg;
+    struct fuse_access_in *arg = (struct fuse_access_in *)inarg;
 
-	if (req->se->op.access)
-		req->se->op.access(req, nodeid, arg->mask);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.access) {
+        req->se->op.access(req, nodeid, arg->mask);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_readlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	(void) inarg;
+    (void)inarg;
 
-	if (req->se->op.readlink)
-		req->se->op.readlink(req, nodeid);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.readlink) {
+        req->se->op.readlink(req, nodeid);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_mknod(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_mknod_in *arg = (struct fuse_mknod_in *) inarg;
-	char *name = PARAM(arg);
+    struct fuse_mknod_in *arg = (struct fuse_mknod_in *)inarg;
+    char *name = PARAM(arg);
 
-	if (req->se->conn.proto_minor >= 12)
-		req->ctx.umask = arg->umask;
-	else
-		name = (char *) inarg + FUSE_COMPAT_MKNOD_IN_SIZE;
+    if (req->se->conn.proto_minor >= 12) {
+        req->ctx.umask = arg->umask;
+    } else {
+        name = (char *)inarg + FUSE_COMPAT_MKNOD_IN_SIZE;
+    }
 
-	if (req->se->op.mknod)
-		req->se->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.mknod) {
+        req->se->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_mkdir_in *arg = (struct fuse_mkdir_in *) inarg;
+    struct fuse_mkdir_in *arg = (struct fuse_mkdir_in *)inarg;
 
-	if (req->se->conn.proto_minor >= 12)
-		req->ctx.umask = arg->umask;
+    if (req->se->conn.proto_minor >= 12) {
+        req->ctx.umask = arg->umask;
+    }
 
-	if (req->se->op.mkdir)
-		req->se->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.mkdir) {
+        req->se->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_unlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	char *name = (char *) inarg;
+    char *name = (char *)inarg;
 
-	if (req->se->op.unlink)
-		req->se->op.unlink(req, nodeid, name);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.unlink) {
+        req->se->op.unlink(req, nodeid, name);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	char *name = (char *) inarg;
+    char *name = (char *)inarg;
 
-	if (req->se->op.rmdir)
-		req->se->op.rmdir(req, nodeid, name);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.rmdir) {
+        req->se->op.rmdir(req, nodeid, name);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_symlink(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	char *name = (char *) inarg;
-	char *linkname = ((char *) inarg) + strlen((char *) inarg) + 1;
+    char *name = (char *)inarg;
+    char *linkname = ((char *)inarg) + strlen((char *)inarg) + 1;
 
-	if (req->se->op.symlink)
-		req->se->op.symlink(req, linkname, nodeid, name);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.symlink) {
+        req->se->op.symlink(req, linkname, nodeid, name);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_rename(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_rename_in *arg = (struct fuse_rename_in *) inarg;
-	char *oldname = PARAM(arg);
-	char *newname = oldname + strlen(oldname) + 1;
+    struct fuse_rename_in *arg = (struct fuse_rename_in *)inarg;
+    char *oldname = PARAM(arg);
+    char *newname = oldname + strlen(oldname) + 1;
 
-	if (req->se->op.rename)
-		req->se->op.rename(req, nodeid, oldname, arg->newdir, newname,
-				  0);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.rename) {
+        req->se->op.rename(req, nodeid, oldname, arg->newdir, newname, 0);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_rename2(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_rename2_in *arg = (struct fuse_rename2_in *) inarg;
-	char *oldname = PARAM(arg);
-	char *newname = oldname + strlen(oldname) + 1;
+    struct fuse_rename2_in *arg = (struct fuse_rename2_in *)inarg;
+    char *oldname = PARAM(arg);
+    char *newname = oldname + strlen(oldname) + 1;
 
-	if (req->se->op.rename)
-		req->se->op.rename(req, nodeid, oldname, arg->newdir, newname,
-				  arg->flags);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.rename) {
+        req->se->op.rename(req, nodeid, oldname, arg->newdir, newname,
+                           arg->flags);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_link(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_link_in *arg = (struct fuse_link_in *) inarg;
+    struct fuse_link_in *arg = (struct fuse_link_in *)inarg;
 
-	if (req->se->op.link)
-		req->se->op.link(req, arg->oldnodeid, nodeid, PARAM(arg));
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.link) {
+        req->se->op.link(req, arg->oldnodeid, nodeid, PARAM(arg));
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_create(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_create_in *arg = (struct fuse_create_in *) inarg;
+    struct fuse_create_in *arg = (struct fuse_create_in *)inarg;
 
-	if (req->se->op.create) {
-		struct fuse_file_info fi;
-		char *name = PARAM(arg);
+    if (req->se->op.create) {
+        struct fuse_file_info fi;
+        char *name = PARAM(arg);
 
-		memset(&fi, 0, sizeof(fi));
-		fi.flags = arg->flags;
+        memset(&fi, 0, sizeof(fi));
+        fi.flags = arg->flags;
 
-		if (req->se->conn.proto_minor >= 12)
-			req->ctx.umask = arg->umask;
-		else
-			name = (char *) inarg + sizeof(struct fuse_open_in);
+        if (req->se->conn.proto_minor >= 12) {
+            req->ctx.umask = arg->umask;
+        } else {
+            name = (char *)inarg + sizeof(struct fuse_open_in);
+        }
 
-		req->se->op.create(req, nodeid, name, arg->mode, &fi);
-	} else
-		fuse_reply_err(req, ENOSYS);
+        req->se->op.create(req, nodeid, name, arg->mode, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_open(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_open_in *arg = (struct fuse_open_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_open_in *arg = (struct fuse_open_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.flags = arg->flags;
+    memset(&fi, 0, sizeof(fi));
+    fi.flags = arg->flags;
 
-	if (req->se->op.open)
-		req->se->op.open(req, nodeid, &fi);
-	else
-		fuse_reply_open(req, &fi);
+    if (req->se->op.open) {
+        req->se->op.open(req, nodeid, &fi);
+    } else {
+        fuse_reply_open(req, &fi);
+    }
 }
 
 static void do_read(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_read_in *arg = (struct fuse_read_in *) inarg;
+    struct fuse_read_in *arg = (struct fuse_read_in *)inarg;
 
-	if (req->se->op.read) {
-		struct fuse_file_info fi;
+    if (req->se->op.read) {
+        struct fuse_file_info fi;
 
-		memset(&fi, 0, sizeof(fi));
-		fi.fh = arg->fh;
-		if (req->se->conn.proto_minor >= 9) {
-			fi.lock_owner = arg->lock_owner;
-			fi.flags = arg->flags;
-		}
-		req->se->op.read(req, nodeid, arg->size, arg->offset, &fi);
-	} else
-		fuse_reply_err(req, ENOSYS);
+        memset(&fi, 0, sizeof(fi));
+        fi.fh = arg->fh;
+        if (req->se->conn.proto_minor >= 9) {
+            fi.lock_owner = arg->lock_owner;
+            fi.flags = arg->flags;
+        }
+        req->se->op.read(req, nodeid, arg->size, arg->offset, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_write(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_write_in *arg = (struct fuse_write_in *) inarg;
-	struct fuse_file_info fi;
-	char *param;
+    struct fuse_write_in *arg = (struct fuse_write_in *)inarg;
+    struct fuse_file_info fi;
+    char *param;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
-	fi.writepage = (arg->write_flags & FUSE_WRITE_CACHE) != 0;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
+    fi.writepage = (arg->write_flags & FUSE_WRITE_CACHE) != 0;
 
-	if (req->se->conn.proto_minor < 9) {
-		param = ((char *) arg) + FUSE_COMPAT_WRITE_IN_SIZE;
-	} else {
-		fi.lock_owner = arg->lock_owner;
-		fi.flags = arg->flags;
-		param = PARAM(arg);
-	}
+    if (req->se->conn.proto_minor < 9) {
+        param = ((char *)arg) + FUSE_COMPAT_WRITE_IN_SIZE;
+    } else {
+        fi.lock_owner = arg->lock_owner;
+        fi.flags = arg->flags;
+        param = PARAM(arg);
+    }
 
-	if (req->se->op.write)
-		req->se->op.write(req, nodeid, param, arg->size,
-				 arg->offset, &fi);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.write) {
+        req->se->op.write(req, nodeid, param, arg->size, arg->offset, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_write_buf(fuse_req_t req, fuse_ino_t nodeid, const void *inarg,
-			 const struct fuse_buf *ibuf)
-{
-	struct fuse_session *se = req->se;
-	struct fuse_bufvec bufv = {
-		.buf[0] = *ibuf,
-		.count = 1,
-	};
-	struct fuse_write_in *arg = (struct fuse_write_in *) inarg;
-	struct fuse_file_info fi;
-
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
-	fi.writepage = arg->write_flags & FUSE_WRITE_CACHE;
-
-	if (se->conn.proto_minor < 9) {
-		bufv.buf[0].mem = ((char *) arg) + FUSE_COMPAT_WRITE_IN_SIZE;
-		bufv.buf[0].size -= sizeof(struct fuse_in_header) +
-			FUSE_COMPAT_WRITE_IN_SIZE;
-		assert(!(bufv.buf[0].flags & FUSE_BUF_IS_FD));
-	} else {
-		fi.lock_owner = arg->lock_owner;
-		fi.flags = arg->flags;
-		if (!(bufv.buf[0].flags & FUSE_BUF_IS_FD))
-			bufv.buf[0].mem = PARAM(arg);
-
-		bufv.buf[0].size -= sizeof(struct fuse_in_header) +
-			sizeof(struct fuse_write_in);
-	}
-	if (bufv.buf[0].size < arg->size) {
-		fuse_log(FUSE_LOG_ERR, "fuse: do_write_buf: buffer size too small\n");
-		fuse_reply_err(req, EIO);
-		return;
-	}
-	bufv.buf[0].size = arg->size;
-
-	se->op.write_buf(req, nodeid, &bufv, arg->offset, &fi);
+                         const struct fuse_buf *ibuf)
+{
+    struct fuse_session *se = req->se;
+    struct fuse_bufvec bufv = {
+        .buf[0] = *ibuf,
+        .count = 1,
+    };
+    struct fuse_write_in *arg = (struct fuse_write_in *)inarg;
+    struct fuse_file_info fi;
+
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
+    fi.writepage = arg->write_flags & FUSE_WRITE_CACHE;
+
+    if (se->conn.proto_minor < 9) {
+        bufv.buf[0].mem = ((char *)arg) + FUSE_COMPAT_WRITE_IN_SIZE;
+        bufv.buf[0].size -=
+            sizeof(struct fuse_in_header) + FUSE_COMPAT_WRITE_IN_SIZE;
+        assert(!(bufv.buf[0].flags & FUSE_BUF_IS_FD));
+    } else {
+        fi.lock_owner = arg->lock_owner;
+        fi.flags = arg->flags;
+        if (!(bufv.buf[0].flags & FUSE_BUF_IS_FD)) {
+            bufv.buf[0].mem = PARAM(arg);
+        }
+
+        bufv.buf[0].size -=
+            sizeof(struct fuse_in_header) + sizeof(struct fuse_write_in);
+    }
+    if (bufv.buf[0].size < arg->size) {
+        fuse_log(FUSE_LOG_ERR, "fuse: do_write_buf: buffer size too small\n");
+        fuse_reply_err(req, EIO);
+        return;
+    }
+    bufv.buf[0].size = arg->size;
+
+    se->op.write_buf(req, nodeid, &bufv, arg->offset, &fi);
 }
 
 static void do_flush(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_flush_in *arg = (struct fuse_flush_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_flush_in *arg = (struct fuse_flush_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
-	fi.flush = 1;
-	if (req->se->conn.proto_minor >= 7)
-		fi.lock_owner = arg->lock_owner;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
+    fi.flush = 1;
+    if (req->se->conn.proto_minor >= 7) {
+        fi.lock_owner = arg->lock_owner;
+    }
 
-	if (req->se->op.flush)
-		req->se->op.flush(req, nodeid, &fi);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.flush) {
+        req->se->op.flush(req, nodeid, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_release(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_release_in *arg = (struct fuse_release_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_release_in *arg = (struct fuse_release_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.flags = arg->flags;
-	fi.fh = arg->fh;
-	if (req->se->conn.proto_minor >= 8) {
-		fi.flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
-		fi.lock_owner = arg->lock_owner;
-	}
-	if (arg->release_flags & FUSE_RELEASE_FLOCK_UNLOCK) {
-		fi.flock_release = 1;
-		fi.lock_owner = arg->lock_owner;
-	}
+    memset(&fi, 0, sizeof(fi));
+    fi.flags = arg->flags;
+    fi.fh = arg->fh;
+    if (req->se->conn.proto_minor >= 8) {
+        fi.flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
+        fi.lock_owner = arg->lock_owner;
+    }
+    if (arg->release_flags & FUSE_RELEASE_FLOCK_UNLOCK) {
+        fi.flock_release = 1;
+        fi.lock_owner = arg->lock_owner;
+    }
 
-	if (req->se->op.release)
-		req->se->op.release(req, nodeid, &fi);
-	else
-		fuse_reply_err(req, 0);
+    if (req->se->op.release) {
+        req->se->op.release(req, nodeid, &fi);
+    } else {
+        fuse_reply_err(req, 0);
+    }
 }
 
 static void do_fsync(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_fsync_in *arg = (struct fuse_fsync_in *) inarg;
-	struct fuse_file_info fi;
-	int datasync = arg->fsync_flags & 1;
+    struct fuse_fsync_in *arg = (struct fuse_fsync_in *)inarg;
+    struct fuse_file_info fi;
+    int datasync = arg->fsync_flags & 1;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
 
-	if (req->se->op.fsync)
-		req->se->op.fsync(req, nodeid, datasync, &fi);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.fsync) {
+        req->se->op.fsync(req, nodeid, datasync, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_opendir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_open_in *arg = (struct fuse_open_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_open_in *arg = (struct fuse_open_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.flags = arg->flags;
+    memset(&fi, 0, sizeof(fi));
+    fi.flags = arg->flags;
 
-	if (req->se->op.opendir)
-		req->se->op.opendir(req, nodeid, &fi);
-	else
-		fuse_reply_open(req, &fi);
+    if (req->se->op.opendir) {
+        req->se->op.opendir(req, nodeid, &fi);
+    } else {
+        fuse_reply_open(req, &fi);
+    }
 }
 
 static void do_readdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_read_in *arg = (struct fuse_read_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_read_in *arg = (struct fuse_read_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
 
-	if (req->se->op.readdir)
-		req->se->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.readdir) {
+        req->se->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_readdirplus(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_read_in *arg = (struct fuse_read_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_read_in *arg = (struct fuse_read_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
 
-	if (req->se->op.readdirplus)
-		req->se->op.readdirplus(req, nodeid, arg->size, arg->offset, &fi);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.readdirplus) {
+        req->se->op.readdirplus(req, nodeid, arg->size, arg->offset, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_release_in *arg = (struct fuse_release_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_release_in *arg = (struct fuse_release_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.flags = arg->flags;
-	fi.fh = arg->fh;
+    memset(&fi, 0, sizeof(fi));
+    fi.flags = arg->flags;
+    fi.fh = arg->fh;
 
-	if (req->se->op.releasedir)
-		req->se->op.releasedir(req, nodeid, &fi);
-	else
-		fuse_reply_err(req, 0);
+    if (req->se->op.releasedir) {
+        req->se->op.releasedir(req, nodeid, &fi);
+    } else {
+        fuse_reply_err(req, 0);
+    }
 }
 
 static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_fsync_in *arg = (struct fuse_fsync_in *) inarg;
-	struct fuse_file_info fi;
-	int datasync = arg->fsync_flags & 1;
+    struct fuse_fsync_in *arg = (struct fuse_fsync_in *)inarg;
+    struct fuse_file_info fi;
+    int datasync = arg->fsync_flags & 1;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
 
-	if (req->se->op.fsyncdir)
-		req->se->op.fsyncdir(req, nodeid, datasync, &fi);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.fsyncdir) {
+        req->se->op.fsyncdir(req, nodeid, datasync, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_statfs(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	(void) nodeid;
-	(void) inarg;
+    (void)nodeid;
+    (void)inarg;
 
-	if (req->se->op.statfs)
-		req->se->op.statfs(req, nodeid);
-	else {
-		struct statvfs buf = {
-			.f_namemax = 255,
-			.f_bsize = 512,
-		};
-		fuse_reply_statfs(req, &buf);
-	}
+    if (req->se->op.statfs) {
+        req->se->op.statfs(req, nodeid);
+    } else {
+        struct statvfs buf = {
+            .f_namemax = 255,
+            .f_bsize = 512,
+        };
+        fuse_reply_statfs(req, &buf);
+    }
 }
 
 static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_setxattr_in *arg = (struct fuse_setxattr_in *) inarg;
-	char *name = PARAM(arg);
-	char *value = name + strlen(name) + 1;
+    struct fuse_setxattr_in *arg = (struct fuse_setxattr_in *)inarg;
+    char *name = PARAM(arg);
+    char *value = name + strlen(name) + 1;
 
-	if (req->se->op.setxattr)
-		req->se->op.setxattr(req, nodeid, name, value, arg->size,
-				    arg->flags);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.setxattr) {
+        req->se->op.setxattr(req, nodeid, name, value, arg->size, arg->flags);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *) inarg;
+    struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *)inarg;
 
-	if (req->se->op.getxattr)
-		req->se->op.getxattr(req, nodeid, PARAM(arg), arg->size);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.getxattr) {
+        req->se->op.getxattr(req, nodeid, PARAM(arg), arg->size);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *) inarg;
+    struct fuse_getxattr_in *arg = (struct fuse_getxattr_in *)inarg;
 
-	if (req->se->op.listxattr)
-		req->se->op.listxattr(req, nodeid, arg->size);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.listxattr) {
+        req->se->op.listxattr(req, nodeid, arg->size);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	char *name = (char *) inarg;
+    char *name = (char *)inarg;
 
-	if (req->se->op.removexattr)
-		req->se->op.removexattr(req, nodeid, name);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.removexattr) {
+        req->se->op.removexattr(req, nodeid, name);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void convert_fuse_file_lock(struct fuse_file_lock *fl,
-				   struct flock *flock)
+                                   struct flock *flock)
 {
-	memset(flock, 0, sizeof(struct flock));
-	flock->l_type = fl->type;
-	flock->l_whence = SEEK_SET;
-	flock->l_start = fl->start;
-	if (fl->end == OFFSET_MAX)
-		flock->l_len = 0;
-	else
-		flock->l_len = fl->end - fl->start + 1;
-	flock->l_pid = fl->pid;
+    memset(flock, 0, sizeof(struct flock));
+    flock->l_type = fl->type;
+    flock->l_whence = SEEK_SET;
+    flock->l_start = fl->start;
+    if (fl->end == OFFSET_MAX) {
+        flock->l_len = 0;
+    } else {
+        flock->l_len = fl->end - fl->start + 1;
+    }
+    flock->l_pid = fl->pid;
 }
 
 static void do_getlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_lk_in *arg = (struct fuse_lk_in *) inarg;
-	struct fuse_file_info fi;
-	struct flock flock;
+    struct fuse_lk_in *arg = (struct fuse_lk_in *)inarg;
+    struct fuse_file_info fi;
+    struct flock flock;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
-	fi.lock_owner = arg->owner;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
+    fi.lock_owner = arg->owner;
 
-	convert_fuse_file_lock(&arg->lk, &flock);
-	if (req->se->op.getlk)
-		req->se->op.getlk(req, nodeid, &fi, &flock);
-	else
-		fuse_reply_err(req, ENOSYS);
+    convert_fuse_file_lock(&arg->lk, &flock);
+    if (req->se->op.getlk) {
+        req->se->op.getlk(req, nodeid, &fi, &flock);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
-			    const void *inarg, int sleep)
-{
-	struct fuse_lk_in *arg = (struct fuse_lk_in *) inarg;
-	struct fuse_file_info fi;
-	struct flock flock;
-
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
-	fi.lock_owner = arg->owner;
-
-	if (arg->lk_flags & FUSE_LK_FLOCK) {
-		int op = 0;
-
-		switch (arg->lk.type) {
-		case F_RDLCK:
-			op = LOCK_SH;
-			break;
-		case F_WRLCK:
-			op = LOCK_EX;
-			break;
-		case F_UNLCK:
-			op = LOCK_UN;
-			break;
-		}
-		if (!sleep)
-			op |= LOCK_NB;
-
-		if (req->se->op.flock)
-			req->se->op.flock(req, nodeid, &fi, op);
-		else
-			fuse_reply_err(req, ENOSYS);
-	} else {
-		convert_fuse_file_lock(&arg->lk, &flock);
-		if (req->se->op.setlk)
-			req->se->op.setlk(req, nodeid, &fi, &flock, sleep);
-		else
-			fuse_reply_err(req, ENOSYS);
-	}
+                            const void *inarg, int sleep)
+{
+    struct fuse_lk_in *arg = (struct fuse_lk_in *)inarg;
+    struct fuse_file_info fi;
+    struct flock flock;
+
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
+    fi.lock_owner = arg->owner;
+
+    if (arg->lk_flags & FUSE_LK_FLOCK) {
+        int op = 0;
+
+        switch (arg->lk.type) {
+        case F_RDLCK:
+            op = LOCK_SH;
+            break;
+        case F_WRLCK:
+            op = LOCK_EX;
+            break;
+        case F_UNLCK:
+            op = LOCK_UN;
+            break;
+        }
+        if (!sleep) {
+            op |= LOCK_NB;
+        }
+
+        if (req->se->op.flock) {
+            req->se->op.flock(req, nodeid, &fi, op);
+        } else {
+            fuse_reply_err(req, ENOSYS);
+        }
+    } else {
+        convert_fuse_file_lock(&arg->lk, &flock);
+        if (req->se->op.setlk) {
+            req->se->op.setlk(req, nodeid, &fi, &flock, sleep);
+        } else {
+            fuse_reply_err(req, ENOSYS);
+        }
+    }
 }
 
 static void do_setlk(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	do_setlk_common(req, nodeid, inarg, 0);
+    do_setlk_common(req, nodeid, inarg, 0);
 }
 
 static void do_setlkw(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	do_setlk_common(req, nodeid, inarg, 1);
+    do_setlk_common(req, nodeid, inarg, 1);
 }
 
 static int find_interrupted(struct fuse_session *se, struct fuse_req *req)
 {
-	struct fuse_req *curr;
-
-	for (curr = se->list.next; curr != &se->list; curr = curr->next) {
-		if (curr->unique == req->u.i.unique) {
-			fuse_interrupt_func_t func;
-			void *data;
-
-			curr->ctr++;
-			pthread_mutex_unlock(&se->lock);
-
-			/* Ugh, ugly locking */
-			pthread_mutex_lock(&curr->lock);
-			pthread_mutex_lock(&se->lock);
-			curr->interrupted = 1;
-			func = curr->u.ni.func;
-			data = curr->u.ni.data;
-			pthread_mutex_unlock(&se->lock);
-			if (func)
-				func(curr, data);
-			pthread_mutex_unlock(&curr->lock);
-
-			pthread_mutex_lock(&se->lock);
-			curr->ctr--;
-			if (!curr->ctr)
-				destroy_req(curr);
-
-			return 1;
-		}
-	}
-	for (curr = se->interrupts.next; curr != &se->interrupts;
-	     curr = curr->next) {
-		if (curr->u.i.unique == req->u.i.unique)
-			return 1;
-	}
-	return 0;
+    struct fuse_req *curr;
+
+    for (curr = se->list.next; curr != &se->list; curr = curr->next) {
+        if (curr->unique == req->u.i.unique) {
+            fuse_interrupt_func_t func;
+            void *data;
+
+            curr->ctr++;
+            pthread_mutex_unlock(&se->lock);
+
+            /* Ugh, ugly locking */
+            pthread_mutex_lock(&curr->lock);
+            pthread_mutex_lock(&se->lock);
+            curr->interrupted = 1;
+            func = curr->u.ni.func;
+            data = curr->u.ni.data;
+            pthread_mutex_unlock(&se->lock);
+            if (func) {
+                func(curr, data);
+            }
+            pthread_mutex_unlock(&curr->lock);
+
+            pthread_mutex_lock(&se->lock);
+            curr->ctr--;
+            if (!curr->ctr) {
+                destroy_req(curr);
+            }
+
+            return 1;
+        }
+    }
+    for (curr = se->interrupts.next; curr != &se->interrupts;
+         curr = curr->next) {
+        if (curr->u.i.unique == req->u.i.unique) {
+            return 1;
+        }
+    }
+    return 0;
 }
 
 static void do_interrupt(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_interrupt_in *arg = (struct fuse_interrupt_in *) inarg;
-	struct fuse_session *se = req->se;
+    struct fuse_interrupt_in *arg = (struct fuse_interrupt_in *)inarg;
+    struct fuse_session *se = req->se;
 
-	(void) nodeid;
-	if (se->debug)
-		fuse_log(FUSE_LOG_DEBUG, "INTERRUPT: %llu\n",
-			(unsigned long long) arg->unique);
+    (void)nodeid;
+    if (se->debug) {
+        fuse_log(FUSE_LOG_DEBUG, "INTERRUPT: %llu\n",
+                 (unsigned long long)arg->unique);
+    }
 
-	req->u.i.unique = arg->unique;
+    req->u.i.unique = arg->unique;
 
-	pthread_mutex_lock(&se->lock);
-	if (find_interrupted(se, req))
-		destroy_req(req);
-	else
-		list_add_req(req, &se->interrupts);
-	pthread_mutex_unlock(&se->lock);
+    pthread_mutex_lock(&se->lock);
+    if (find_interrupted(se, req)) {
+        destroy_req(req);
+    } else {
+        list_add_req(req, &se->interrupts);
+    }
+    pthread_mutex_unlock(&se->lock);
 }
 
 static struct fuse_req *check_interrupt(struct fuse_session *se,
-					struct fuse_req *req)
-{
-	struct fuse_req *curr;
-
-	for (curr = se->interrupts.next; curr != &se->interrupts;
-	     curr = curr->next) {
-		if (curr->u.i.unique == req->unique) {
-			req->interrupted = 1;
-			list_del_req(curr);
-			free(curr);
-			return NULL;
-		}
-	}
-	curr = se->interrupts.next;
-	if (curr != &se->interrupts) {
-		list_del_req(curr);
-		list_init_req(curr);
-		return curr;
-	} else
-		return NULL;
+                                        struct fuse_req *req)
+{
+    struct fuse_req *curr;
+
+    for (curr = se->interrupts.next; curr != &se->interrupts;
+         curr = curr->next) {
+        if (curr->u.i.unique == req->unique) {
+            req->interrupted = 1;
+            list_del_req(curr);
+            free(curr);
+            return NULL;
+        }
+    }
+    curr = se->interrupts.next;
+    if (curr != &se->interrupts) {
+        list_del_req(curr);
+        list_init_req(curr);
+        return curr;
+    } else {
+        return NULL;
+    }
 }
 
 static void do_bmap(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_bmap_in *arg = (struct fuse_bmap_in *) inarg;
+    struct fuse_bmap_in *arg = (struct fuse_bmap_in *)inarg;
 
-	if (req->se->op.bmap)
-		req->se->op.bmap(req, nodeid, arg->blocksize, arg->block);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.bmap) {
+        req->se->op.bmap(req, nodeid, arg->blocksize, arg->block);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_ioctl_in *arg = (struct fuse_ioctl_in *) inarg;
-	unsigned int flags = arg->flags;
-	void *in_buf = arg->in_size ? PARAM(arg) : NULL;
-	struct fuse_file_info fi;
+    struct fuse_ioctl_in *arg = (struct fuse_ioctl_in *)inarg;
+    unsigned int flags = arg->flags;
+    void *in_buf = arg->in_size ? PARAM(arg) : NULL;
+    struct fuse_file_info fi;
 
-	if (flags & FUSE_IOCTL_DIR &&
-	    !(req->se->conn.want & FUSE_CAP_IOCTL_DIR)) {
-		fuse_reply_err(req, ENOTTY);
-		return;
-	}
+    if (flags & FUSE_IOCTL_DIR && !(req->se->conn.want & FUSE_CAP_IOCTL_DIR)) {
+        fuse_reply_err(req, ENOTTY);
+        return;
+    }
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
 
-	if (sizeof(void *) == 4 && req->se->conn.proto_minor >= 16 &&
-	    !(flags & FUSE_IOCTL_32BIT)) {
-		req->ioctl_64bit = 1;
-	}
+    if (sizeof(void *) == 4 && req->se->conn.proto_minor >= 16 &&
+        !(flags & FUSE_IOCTL_32BIT)) {
+        req->ioctl_64bit = 1;
+    }
 
-	if (req->se->op.ioctl)
-		req->se->op.ioctl(req, nodeid, arg->cmd,
-				 (void *)(uintptr_t)arg->arg, &fi, flags,
-				 in_buf, arg->in_size, arg->out_size);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.ioctl) {
+        req->se->op.ioctl(req, nodeid, arg->cmd, (void *)(uintptr_t)arg->arg,
+                          &fi, flags, in_buf, arg->in_size, arg->out_size);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)
 {
-	free(ph);
+    free(ph);
 }
 
 static void do_poll(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_poll_in *arg = (struct fuse_poll_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_poll_in *arg = (struct fuse_poll_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
-	fi.poll_events = arg->events;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
+    fi.poll_events = arg->events;
 
-	if (req->se->op.poll) {
-		struct fuse_pollhandle *ph = NULL;
+    if (req->se->op.poll) {
+        struct fuse_pollhandle *ph = NULL;
 
-		if (arg->flags & FUSE_POLL_SCHEDULE_NOTIFY) {
-			ph = malloc(sizeof(struct fuse_pollhandle));
-			if (ph == NULL) {
-				fuse_reply_err(req, ENOMEM);
-				return;
-			}
-			ph->kh = arg->kh;
-			ph->se = req->se;
-		}
+        if (arg->flags & FUSE_POLL_SCHEDULE_NOTIFY) {
+            ph = malloc(sizeof(struct fuse_pollhandle));
+            if (ph == NULL) {
+                fuse_reply_err(req, ENOMEM);
+                return;
+            }
+            ph->kh = arg->kh;
+            ph->se = req->se;
+        }
 
-		req->se->op.poll(req, nodeid, &fi, ph);
-	} else {
-		fuse_reply_err(req, ENOSYS);
-	}
+        req->se->op.poll(req, nodeid, &fi, ph);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_fallocate(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_fallocate_in *arg = (struct fuse_fallocate_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_fallocate_in *arg = (struct fuse_fallocate_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
 
-	if (req->se->op.fallocate)
-		req->se->op.fallocate(req, nodeid, arg->mode, arg->offset, arg->length, &fi);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.fallocate) {
+        req->se->op.fallocate(req, nodeid, arg->mode, arg->offset, arg->length,
+                              &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
-static void do_copy_file_range(fuse_req_t req, fuse_ino_t nodeid_in, const void *inarg)
+static void do_copy_file_range(fuse_req_t req, fuse_ino_t nodeid_in,
+                               const void *inarg)
 {
-	struct fuse_copy_file_range_in *arg = (struct fuse_copy_file_range_in *) inarg;
-	struct fuse_file_info fi_in, fi_out;
+    struct fuse_copy_file_range_in *arg =
+        (struct fuse_copy_file_range_in *)inarg;
+    struct fuse_file_info fi_in, fi_out;
 
-	memset(&fi_in, 0, sizeof(fi_in));
-	fi_in.fh = arg->fh_in;
+    memset(&fi_in, 0, sizeof(fi_in));
+    fi_in.fh = arg->fh_in;
 
-	memset(&fi_out, 0, sizeof(fi_out));
-	fi_out.fh = arg->fh_out;
+    memset(&fi_out, 0, sizeof(fi_out));
+    fi_out.fh = arg->fh_out;
 
 
-	if (req->se->op.copy_file_range)
-		req->se->op.copy_file_range(req, nodeid_in, arg->off_in,
-					    &fi_in, arg->nodeid_out,
-					    arg->off_out, &fi_out, arg->len,
-					    arg->flags);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.copy_file_range) {
+        req->se->op.copy_file_range(req, nodeid_in, arg->off_in, &fi_in,
+                                    arg->nodeid_out, arg->off_out, &fi_out,
+                                    arg->len, arg->flags);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_lseek(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_lseek_in *arg = (struct fuse_lseek_in *) inarg;
-	struct fuse_file_info fi;
+    struct fuse_lseek_in *arg = (struct fuse_lseek_in *)inarg;
+    struct fuse_file_info fi;
 
-	memset(&fi, 0, sizeof(fi));
-	fi.fh = arg->fh;
+    memset(&fi, 0, sizeof(fi));
+    fi.fh = arg->fh;
 
-	if (req->se->op.lseek)
-		req->se->op.lseek(req, nodeid, arg->offset, arg->whence, &fi);
-	else
-		fuse_reply_err(req, ENOSYS);
+    if (req->se->op.lseek) {
+        req->se->op.lseek(req, nodeid, arg->offset, arg->whence, &fi);
+    } else {
+        fuse_reply_err(req, ENOSYS);
+    }
 }
 
 static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
-	struct fuse_init_out outarg;
-	struct fuse_session *se = req->se;
-	size_t bufsize = se->bufsize;
-	size_t outargsize = sizeof(outarg);
-
-	(void) nodeid;
-	if (se->debug) {
-		fuse_log(FUSE_LOG_DEBUG, "INIT: %u.%u\n", arg->major, arg->minor);
-		if (arg->major == 7 && arg->minor >= 6) {
-			fuse_log(FUSE_LOG_DEBUG, "flags=0x%08x\n", arg->flags);
-			fuse_log(FUSE_LOG_DEBUG, "max_readahead=0x%08x\n",
-				arg->max_readahead);
-		}
-	}
-	se->conn.proto_major = arg->major;
-	se->conn.proto_minor = arg->minor;
-	se->conn.capable = 0;
-	se->conn.want = 0;
-
-	memset(&outarg, 0, sizeof(outarg));
-	outarg.major = FUSE_KERNEL_VERSION;
-	outarg.minor = FUSE_KERNEL_MINOR_VERSION;
-
-	if (arg->major < 7) {
-		fuse_log(FUSE_LOG_ERR, "fuse: unsupported protocol version: %u.%u\n",
-			arg->major, arg->minor);
-		fuse_reply_err(req, EPROTO);
-		return;
-	}
-
-	if (arg->major > 7) {
-		/* Wait for a second INIT request with a 7.X version */
-		send_reply_ok(req, &outarg, sizeof(outarg));
-		return;
-	}
-
-	if (arg->minor >= 6) {
-		if (arg->max_readahead < se->conn.max_readahead)
-			se->conn.max_readahead = arg->max_readahead;
-		if (arg->flags & FUSE_ASYNC_READ)
-			se->conn.capable |= FUSE_CAP_ASYNC_READ;
-		if (arg->flags & FUSE_POSIX_LOCKS)
-			se->conn.capable |= FUSE_CAP_POSIX_LOCKS;
-		if (arg->flags & FUSE_ATOMIC_O_TRUNC)
-			se->conn.capable |= FUSE_CAP_ATOMIC_O_TRUNC;
-		if (arg->flags & FUSE_EXPORT_SUPPORT)
-			se->conn.capable |= FUSE_CAP_EXPORT_SUPPORT;
-		if (arg->flags & FUSE_DONT_MASK)
-			se->conn.capable |= FUSE_CAP_DONT_MASK;
-		if (arg->flags & FUSE_FLOCK_LOCKS)
-			se->conn.capable |= FUSE_CAP_FLOCK_LOCKS;
-		if (arg->flags & FUSE_AUTO_INVAL_DATA)
-			se->conn.capable |= FUSE_CAP_AUTO_INVAL_DATA;
-		if (arg->flags & FUSE_DO_READDIRPLUS)
-			se->conn.capable |= FUSE_CAP_READDIRPLUS;
-		if (arg->flags & FUSE_READDIRPLUS_AUTO)
-			se->conn.capable |= FUSE_CAP_READDIRPLUS_AUTO;
-		if (arg->flags & FUSE_ASYNC_DIO)
-			se->conn.capable |= FUSE_CAP_ASYNC_DIO;
-		if (arg->flags & FUSE_WRITEBACK_CACHE)
-			se->conn.capable |= FUSE_CAP_WRITEBACK_CACHE;
-		if (arg->flags & FUSE_NO_OPEN_SUPPORT)
-			se->conn.capable |= FUSE_CAP_NO_OPEN_SUPPORT;
-		if (arg->flags & FUSE_PARALLEL_DIROPS)
-			se->conn.capable |= FUSE_CAP_PARALLEL_DIROPS;
-		if (arg->flags & FUSE_POSIX_ACL)
-			se->conn.capable |= FUSE_CAP_POSIX_ACL;
-		if (arg->flags & FUSE_HANDLE_KILLPRIV)
-			se->conn.capable |= FUSE_CAP_HANDLE_KILLPRIV;
-		if (arg->flags & FUSE_NO_OPENDIR_SUPPORT)
-			se->conn.capable |= FUSE_CAP_NO_OPENDIR_SUPPORT;
-		if (!(arg->flags & FUSE_MAX_PAGES)) {
-			size_t max_bufsize =
-				FUSE_DEFAULT_MAX_PAGES_PER_REQ * getpagesize()
-				+ FUSE_BUFFER_HEADER_SIZE;
-			if (bufsize > max_bufsize) {
-				bufsize = max_bufsize;
-			}
-		}
-	} else {
-		se->conn.max_readahead = 0;
-	}
-
-	if (se->conn.proto_minor >= 14) {
+    struct fuse_init_in *arg = (struct fuse_init_in *)inarg;
+    struct fuse_init_out outarg;
+    struct fuse_session *se = req->se;
+    size_t bufsize = se->bufsize;
+    size_t outargsize = sizeof(outarg);
+
+    (void)nodeid;
+    if (se->debug) {
+        fuse_log(FUSE_LOG_DEBUG, "INIT: %u.%u\n", arg->major, arg->minor);
+        if (arg->major == 7 && arg->minor >= 6) {
+            fuse_log(FUSE_LOG_DEBUG, "flags=0x%08x\n", arg->flags);
+            fuse_log(FUSE_LOG_DEBUG, "max_readahead=0x%08x\n",
+                     arg->max_readahead);
+        }
+    }
+    se->conn.proto_major = arg->major;
+    se->conn.proto_minor = arg->minor;
+    se->conn.capable = 0;
+    se->conn.want = 0;
+
+    memset(&outarg, 0, sizeof(outarg));
+    outarg.major = FUSE_KERNEL_VERSION;
+    outarg.minor = FUSE_KERNEL_MINOR_VERSION;
+
+    if (arg->major < 7) {
+        fuse_log(FUSE_LOG_ERR, "fuse: unsupported protocol version: %u.%u\n",
+                 arg->major, arg->minor);
+        fuse_reply_err(req, EPROTO);
+        return;
+    }
+
+    if (arg->major > 7) {
+        /* Wait for a second INIT request with a 7.X version */
+        send_reply_ok(req, &outarg, sizeof(outarg));
+        return;
+    }
+
+    if (arg->minor >= 6) {
+        if (arg->max_readahead < se->conn.max_readahead) {
+            se->conn.max_readahead = arg->max_readahead;
+        }
+        if (arg->flags & FUSE_ASYNC_READ) {
+            se->conn.capable |= FUSE_CAP_ASYNC_READ;
+        }
+        if (arg->flags & FUSE_POSIX_LOCKS) {
+            se->conn.capable |= FUSE_CAP_POSIX_LOCKS;
+        }
+        if (arg->flags & FUSE_ATOMIC_O_TRUNC) {
+            se->conn.capable |= FUSE_CAP_ATOMIC_O_TRUNC;
+        }
+        if (arg->flags & FUSE_EXPORT_SUPPORT) {
+            se->conn.capable |= FUSE_CAP_EXPORT_SUPPORT;
+        }
+        if (arg->flags & FUSE_DONT_MASK) {
+            se->conn.capable |= FUSE_CAP_DONT_MASK;
+        }
+        if (arg->flags & FUSE_FLOCK_LOCKS) {
+            se->conn.capable |= FUSE_CAP_FLOCK_LOCKS;
+        }
+        if (arg->flags & FUSE_AUTO_INVAL_DATA) {
+            se->conn.capable |= FUSE_CAP_AUTO_INVAL_DATA;
+        }
+        if (arg->flags & FUSE_DO_READDIRPLUS) {
+            se->conn.capable |= FUSE_CAP_READDIRPLUS;
+        }
+        if (arg->flags & FUSE_READDIRPLUS_AUTO) {
+            se->conn.capable |= FUSE_CAP_READDIRPLUS_AUTO;
+        }
+        if (arg->flags & FUSE_ASYNC_DIO) {
+            se->conn.capable |= FUSE_CAP_ASYNC_DIO;
+        }
+        if (arg->flags & FUSE_WRITEBACK_CACHE) {
+            se->conn.capable |= FUSE_CAP_WRITEBACK_CACHE;
+        }
+        if (arg->flags & FUSE_NO_OPEN_SUPPORT) {
+            se->conn.capable |= FUSE_CAP_NO_OPEN_SUPPORT;
+        }
+        if (arg->flags & FUSE_PARALLEL_DIROPS) {
+            se->conn.capable |= FUSE_CAP_PARALLEL_DIROPS;
+        }
+        if (arg->flags & FUSE_POSIX_ACL) {
+            se->conn.capable |= FUSE_CAP_POSIX_ACL;
+        }
+        if (arg->flags & FUSE_HANDLE_KILLPRIV) {
+            se->conn.capable |= FUSE_CAP_HANDLE_KILLPRIV;
+        }
+        if (arg->flags & FUSE_NO_OPENDIR_SUPPORT) {
+            se->conn.capable |= FUSE_CAP_NO_OPENDIR_SUPPORT;
+        }
+        if (!(arg->flags & FUSE_MAX_PAGES)) {
+            size_t max_bufsize =
+                FUSE_DEFAULT_MAX_PAGES_PER_REQ * getpagesize() +
+                FUSE_BUFFER_HEADER_SIZE;
+            if (bufsize > max_bufsize) {
+                bufsize = max_bufsize;
+            }
+        }
+    } else {
+        se->conn.max_readahead = 0;
+    }
+
+    if (se->conn.proto_minor >= 14) {
 #ifdef HAVE_SPLICE
 #ifdef HAVE_VMSPLICE
-		se->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
+        se->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
 #endif
-		se->conn.capable |= FUSE_CAP_SPLICE_READ;
+        se->conn.capable |= FUSE_CAP_SPLICE_READ;
 #endif
-	}
-	if (se->conn.proto_minor >= 18)
-		se->conn.capable |= FUSE_CAP_IOCTL_DIR;
-
-	/* Default settings for modern filesystems.
-	 *
-	 * Most of these capabilities were disabled by default in
-	 * libfuse2 for backwards compatibility reasons. In libfuse3,
-	 * we can finally enable them by default (as long as they're
-	 * supported by the kernel).
-	 */
-#define LL_SET_DEFAULT(cond, cap) \
-	if ((cond) && (se->conn.capable & (cap))) \
-		se->conn.want |= (cap)
-	LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_READ);
-	LL_SET_DEFAULT(1, FUSE_CAP_PARALLEL_DIROPS);
-	LL_SET_DEFAULT(1, FUSE_CAP_AUTO_INVAL_DATA);
-	LL_SET_DEFAULT(1, FUSE_CAP_HANDLE_KILLPRIV);
-	LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_DIO);
-	LL_SET_DEFAULT(1, FUSE_CAP_IOCTL_DIR);
-	LL_SET_DEFAULT(1, FUSE_CAP_ATOMIC_O_TRUNC);
-	LL_SET_DEFAULT(se->op.write_buf, FUSE_CAP_SPLICE_READ);
-	LL_SET_DEFAULT(se->op.getlk && se->op.setlk,
-		       FUSE_CAP_POSIX_LOCKS);
-	LL_SET_DEFAULT(se->op.flock, FUSE_CAP_FLOCK_LOCKS);
-	LL_SET_DEFAULT(se->op.readdirplus, FUSE_CAP_READDIRPLUS);
-	LL_SET_DEFAULT(se->op.readdirplus && se->op.readdir,
-		       FUSE_CAP_READDIRPLUS_AUTO);
-	se->conn.time_gran = 1;
-	
-	if (bufsize < FUSE_MIN_READ_BUFFER) {
-		fuse_log(FUSE_LOG_ERR, "fuse: warning: buffer size too small: %zu\n",
-			bufsize);
-		bufsize = FUSE_MIN_READ_BUFFER;
-	}
-	se->bufsize = bufsize;
-
-	if (se->conn.max_write > bufsize - FUSE_BUFFER_HEADER_SIZE)
-		se->conn.max_write = bufsize - FUSE_BUFFER_HEADER_SIZE;
-
-	se->got_init = 1;
-	if (se->op.init)
-		se->op.init(se->userdata, &se->conn);
-
-	if (se->conn.want & (~se->conn.capable)) {
-		fuse_log(FUSE_LOG_ERR, "fuse: error: filesystem requested capabilities "
-			"0x%x that are not supported by kernel, aborting.\n",
-			se->conn.want & (~se->conn.capable));
-		fuse_reply_err(req, EPROTO);
-		se->error = -EPROTO;
-		fuse_session_exit(se);
-		return;
-	}
-
-	if (se->conn.max_write < bufsize - FUSE_BUFFER_HEADER_SIZE) {
-		se->bufsize = se->conn.max_write + FUSE_BUFFER_HEADER_SIZE;
-	}
-	if (arg->flags & FUSE_MAX_PAGES) {
-		outarg.flags |= FUSE_MAX_PAGES;
-		outarg.max_pages = (se->conn.max_write - 1) / getpagesize() + 1;
-	}
-
-	/* Always enable big writes, this is superseded
-	   by the max_write option */
-	outarg.flags |= FUSE_BIG_WRITES;
-
-	if (se->conn.want & FUSE_CAP_ASYNC_READ)
-		outarg.flags |= FUSE_ASYNC_READ;
-	if (se->conn.want & FUSE_CAP_POSIX_LOCKS)
-		outarg.flags |= FUSE_POSIX_LOCKS;
-	if (se->conn.want & FUSE_CAP_ATOMIC_O_TRUNC)
-		outarg.flags |= FUSE_ATOMIC_O_TRUNC;
-	if (se->conn.want & FUSE_CAP_EXPORT_SUPPORT)
-		outarg.flags |= FUSE_EXPORT_SUPPORT;
-	if (se->conn.want & FUSE_CAP_DONT_MASK)
-		outarg.flags |= FUSE_DONT_MASK;
-	if (se->conn.want & FUSE_CAP_FLOCK_LOCKS)
-		outarg.flags |= FUSE_FLOCK_LOCKS;
-	if (se->conn.want & FUSE_CAP_AUTO_INVAL_DATA)
-		outarg.flags |= FUSE_AUTO_INVAL_DATA;
-	if (se->conn.want & FUSE_CAP_READDIRPLUS)
-		outarg.flags |= FUSE_DO_READDIRPLUS;
-	if (se->conn.want & FUSE_CAP_READDIRPLUS_AUTO)
-		outarg.flags |= FUSE_READDIRPLUS_AUTO;
-	if (se->conn.want & FUSE_CAP_ASYNC_DIO)
-		outarg.flags |= FUSE_ASYNC_DIO;
-	if (se->conn.want & FUSE_CAP_WRITEBACK_CACHE)
-		outarg.flags |= FUSE_WRITEBACK_CACHE;
-	if (se->conn.want & FUSE_CAP_POSIX_ACL)
-		outarg.flags |= FUSE_POSIX_ACL;
-	outarg.max_readahead = se->conn.max_readahead;
-	outarg.max_write = se->conn.max_write;
-	if (se->conn.proto_minor >= 13) {
-		if (se->conn.max_background >= (1 << 16))
-			se->conn.max_background = (1 << 16) - 1;
-		if (se->conn.congestion_threshold > se->conn.max_background)
-			se->conn.congestion_threshold = se->conn.max_background;
-		if (!se->conn.congestion_threshold) {
-			se->conn.congestion_threshold =
-				se->conn.max_background * 3 / 4;
-		}
-
-		outarg.max_background = se->conn.max_background;
-		outarg.congestion_threshold = se->conn.congestion_threshold;
-	}
-	if (se->conn.proto_minor >= 23)
-		outarg.time_gran = se->conn.time_gran;
-
-	if (se->debug) {
-		fuse_log(FUSE_LOG_DEBUG, "   INIT: %u.%u\n", outarg.major, outarg.minor);
-		fuse_log(FUSE_LOG_DEBUG, "   flags=0x%08x\n", outarg.flags);
-		fuse_log(FUSE_LOG_DEBUG, "   max_readahead=0x%08x\n",
-			outarg.max_readahead);
-		fuse_log(FUSE_LOG_DEBUG, "   max_write=0x%08x\n", outarg.max_write);
-		fuse_log(FUSE_LOG_DEBUG, "   max_background=%i\n",
-			outarg.max_background);
-		fuse_log(FUSE_LOG_DEBUG, "   congestion_threshold=%i\n",
-			outarg.congestion_threshold);
-		fuse_log(FUSE_LOG_DEBUG, "   time_gran=%u\n",
-			outarg.time_gran);
-	}
-	if (arg->minor < 5)
-		outargsize = FUSE_COMPAT_INIT_OUT_SIZE;
-	else if (arg->minor < 23)
-		outargsize = FUSE_COMPAT_22_INIT_OUT_SIZE;
-
-	send_reply_ok(req, &outarg, outargsize);
+    }
+    if (se->conn.proto_minor >= 18) {
+        se->conn.capable |= FUSE_CAP_IOCTL_DIR;
+    }
+
+    /*
+     * Default settings for modern filesystems.
+     *
+     * Most of these capabilities were disabled by default in
+     * libfuse2 for backwards compatibility reasons. In libfuse3,
+     * we can finally enable them by default (as long as they're
+     * supported by the kernel).
+     */
+#define LL_SET_DEFAULT(cond, cap)             \
+    if ((cond) && (se->conn.capable & (cap))) \
+        se->conn.want |= (cap)
+    LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_READ);
+    LL_SET_DEFAULT(1, FUSE_CAP_PARALLEL_DIROPS);
+    LL_SET_DEFAULT(1, FUSE_CAP_AUTO_INVAL_DATA);
+    LL_SET_DEFAULT(1, FUSE_CAP_HANDLE_KILLPRIV);
+    LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_DIO);
+    LL_SET_DEFAULT(1, FUSE_CAP_IOCTL_DIR);
+    LL_SET_DEFAULT(1, FUSE_CAP_ATOMIC_O_TRUNC);
+    LL_SET_DEFAULT(se->op.write_buf, FUSE_CAP_SPLICE_READ);
+    LL_SET_DEFAULT(se->op.getlk && se->op.setlk, FUSE_CAP_POSIX_LOCKS);
+    LL_SET_DEFAULT(se->op.flock, FUSE_CAP_FLOCK_LOCKS);
+    LL_SET_DEFAULT(se->op.readdirplus, FUSE_CAP_READDIRPLUS);
+    LL_SET_DEFAULT(se->op.readdirplus && se->op.readdir,
+                   FUSE_CAP_READDIRPLUS_AUTO);
+    se->conn.time_gran = 1;
+
+    if (bufsize < FUSE_MIN_READ_BUFFER) {
+        fuse_log(FUSE_LOG_ERR, "fuse: warning: buffer size too small: %zu\n",
+                 bufsize);
+        bufsize = FUSE_MIN_READ_BUFFER;
+    }
+    se->bufsize = bufsize;
+
+    if (se->conn.max_write > bufsize - FUSE_BUFFER_HEADER_SIZE) {
+        se->conn.max_write = bufsize - FUSE_BUFFER_HEADER_SIZE;
+    }
+
+    se->got_init = 1;
+    if (se->op.init) {
+        se->op.init(se->userdata, &se->conn);
+    }
+
+    if (se->conn.want & (~se->conn.capable)) {
+        fuse_log(FUSE_LOG_ERR,
+                 "fuse: error: filesystem requested capabilities "
+                 "0x%x that are not supported by kernel, aborting.\n",
+                 se->conn.want & (~se->conn.capable));
+        fuse_reply_err(req, EPROTO);
+        se->error = -EPROTO;
+        fuse_session_exit(se);
+        return;
+    }
+
+    if (se->conn.max_write < bufsize - FUSE_BUFFER_HEADER_SIZE) {
+        se->bufsize = se->conn.max_write + FUSE_BUFFER_HEADER_SIZE;
+    }
+    if (arg->flags & FUSE_MAX_PAGES) {
+        outarg.flags |= FUSE_MAX_PAGES;
+        outarg.max_pages = (se->conn.max_write - 1) / getpagesize() + 1;
+    }
+
+    /*
+     * Always enable big writes, this is superseded
+     * by the max_write option
+     */
+    outarg.flags |= FUSE_BIG_WRITES;
+
+    if (se->conn.want & FUSE_CAP_ASYNC_READ) {
+        outarg.flags |= FUSE_ASYNC_READ;
+    }
+    if (se->conn.want & FUSE_CAP_POSIX_LOCKS) {
+        outarg.flags |= FUSE_POSIX_LOCKS;
+    }
+    if (se->conn.want & FUSE_CAP_ATOMIC_O_TRUNC) {
+        outarg.flags |= FUSE_ATOMIC_O_TRUNC;
+    }
+    if (se->conn.want & FUSE_CAP_EXPORT_SUPPORT) {
+        outarg.flags |= FUSE_EXPORT_SUPPORT;
+    }
+    if (se->conn.want & FUSE_CAP_DONT_MASK) {
+        outarg.flags |= FUSE_DONT_MASK;
+    }
+    if (se->conn.want & FUSE_CAP_FLOCK_LOCKS) {
+        outarg.flags |= FUSE_FLOCK_LOCKS;
+    }
+    if (se->conn.want & FUSE_CAP_AUTO_INVAL_DATA) {
+        outarg.flags |= FUSE_AUTO_INVAL_DATA;
+    }
+    if (se->conn.want & FUSE_CAP_READDIRPLUS) {
+        outarg.flags |= FUSE_DO_READDIRPLUS;
+    }
+    if (se->conn.want & FUSE_CAP_READDIRPLUS_AUTO) {
+        outarg.flags |= FUSE_READDIRPLUS_AUTO;
+    }
+    if (se->conn.want & FUSE_CAP_ASYNC_DIO) {
+        outarg.flags |= FUSE_ASYNC_DIO;
+    }
+    if (se->conn.want & FUSE_CAP_WRITEBACK_CACHE) {
+        outarg.flags |= FUSE_WRITEBACK_CACHE;
+    }
+    if (se->conn.want & FUSE_CAP_POSIX_ACL) {
+        outarg.flags |= FUSE_POSIX_ACL;
+    }
+    outarg.max_readahead = se->conn.max_readahead;
+    outarg.max_write = se->conn.max_write;
+    if (se->conn.proto_minor >= 13) {
+        if (se->conn.max_background >= (1 << 16)) {
+            se->conn.max_background = (1 << 16) - 1;
+        }
+        if (se->conn.congestion_threshold > se->conn.max_background) {
+            se->conn.congestion_threshold = se->conn.max_background;
+        }
+        if (!se->conn.congestion_threshold) {
+            se->conn.congestion_threshold = se->conn.max_background * 3 / 4;
+        }
+
+        outarg.max_background = se->conn.max_background;
+        outarg.congestion_threshold = se->conn.congestion_threshold;
+    }
+    if (se->conn.proto_minor >= 23) {
+        outarg.time_gran = se->conn.time_gran;
+    }
+
+    if (se->debug) {
+        fuse_log(FUSE_LOG_DEBUG, "   INIT: %u.%u\n", outarg.major,
+                 outarg.minor);
+        fuse_log(FUSE_LOG_DEBUG, "   flags=0x%08x\n", outarg.flags);
+        fuse_log(FUSE_LOG_DEBUG, "   max_readahead=0x%08x\n",
+                 outarg.max_readahead);
+        fuse_log(FUSE_LOG_DEBUG, "   max_write=0x%08x\n", outarg.max_write);
+        fuse_log(FUSE_LOG_DEBUG, "   max_background=%i\n",
+                 outarg.max_background);
+        fuse_log(FUSE_LOG_DEBUG, "   congestion_threshold=%i\n",
+                 outarg.congestion_threshold);
+        fuse_log(FUSE_LOG_DEBUG, "   time_gran=%u\n", outarg.time_gran);
+    }
+    if (arg->minor < 5) {
+        outargsize = FUSE_COMPAT_INIT_OUT_SIZE;
+    } else if (arg->minor < 23) {
+        outargsize = FUSE_COMPAT_22_INIT_OUT_SIZE;
+    }
+
+    send_reply_ok(req, &outarg, outargsize);
 }
 
 static void do_destroy(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
-	struct fuse_session *se = req->se;
+    struct fuse_session *se = req->se;
 
-	(void) nodeid;
-	(void) inarg;
+    (void)nodeid;
+    (void)inarg;
 
-	se->got_destroy = 1;
-	if (se->op.destroy)
-		se->op.destroy(se->userdata);
+    se->got_destroy = 1;
+    if (se->op.destroy) {
+        se->op.destroy(se->userdata);
+    }
 
-	send_reply_ok(req, NULL, 0);
+    send_reply_ok(req, NULL, 0);
 }
 
 static void list_del_nreq(struct fuse_notify_req *nreq)
 {
-	struct fuse_notify_req *prev = nreq->prev;
-	struct fuse_notify_req *next = nreq->next;
-	prev->next = next;
-	next->prev = prev;
+    struct fuse_notify_req *prev = nreq->prev;
+    struct fuse_notify_req *next = nreq->next;
+    prev->next = next;
+    next->prev = prev;
 }
 
 static void list_add_nreq(struct fuse_notify_req *nreq,
-			  struct fuse_notify_req *next)
+                          struct fuse_notify_req *next)
 {
-	struct fuse_notify_req *prev = next->prev;
-	nreq->next = next;
-	nreq->prev = prev;
-	prev->next = nreq;
-	next->prev = nreq;
+    struct fuse_notify_req *prev = next->prev;
+    nreq->next = next;
+    nreq->prev = prev;
+    prev->next = nreq;
+    next->prev = nreq;
 }
 
 static void list_init_nreq(struct fuse_notify_req *nreq)
 {
-	nreq->next = nreq;
-	nreq->prev = nreq;
+    nreq->next = nreq;
+    nreq->prev = nreq;
 }
 
 static void do_notify_reply(fuse_req_t req, fuse_ino_t nodeid,
-			    const void *inarg, const struct fuse_buf *buf)
+                            const void *inarg, const struct fuse_buf *buf)
 {
-	struct fuse_session *se = req->se;
-	struct fuse_notify_req *nreq;
-	struct fuse_notify_req *head;
+    struct fuse_session *se = req->se;
+    struct fuse_notify_req *nreq;
+    struct fuse_notify_req *head;
 
-	pthread_mutex_lock(&se->lock);
-	head = &se->notify_list;
-	for (nreq = head->next; nreq != head; nreq = nreq->next) {
-		if (nreq->unique == req->unique) {
-			list_del_nreq(nreq);
-			break;
-		}
-	}
-	pthread_mutex_unlock(&se->lock);
+    pthread_mutex_lock(&se->lock);
+    head = &se->notify_list;
+    for (nreq = head->next; nreq != head; nreq = nreq->next) {
+        if (nreq->unique == req->unique) {
+            list_del_nreq(nreq);
+            break;
+        }
+    }
+    pthread_mutex_unlock(&se->lock);
 
-	if (nreq != head)
-		nreq->reply(nreq, req, nodeid, inarg, buf);
+    if (nreq != head) {
+        nreq->reply(nreq, req, nodeid, inarg, buf);
+    }
 }
 
 static int send_notify_iov(struct fuse_session *se, int notify_code,
-			   struct iovec *iov, int count)
+                           struct iovec *iov, int count)
 {
-	struct fuse_out_header out;
+    struct fuse_out_header out;
 
-	if (!se->got_init)
-		return -ENOTCONN;
+    if (!se->got_init) {
+        return -ENOTCONN;
+    }
 
-	out.unique = 0;
-	out.error = notify_code;
-	iov[0].iov_base = &out;
-	iov[0].iov_len = sizeof(struct fuse_out_header);
+    out.unique = 0;
+    out.error = notify_code;
+    iov[0].iov_base = &out;
+    iov[0].iov_len = sizeof(struct fuse_out_header);
 
-	return fuse_send_msg(se, NULL, iov, count);
+    return fuse_send_msg(se, NULL, iov, count);
 }
 
 int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph)
 {
-	if (ph != NULL) {
-		struct fuse_notify_poll_wakeup_out outarg;
-		struct iovec iov[2];
+    if (ph != NULL) {
+        struct fuse_notify_poll_wakeup_out outarg;
+        struct iovec iov[2];
 
-		outarg.kh = ph->kh;
+        outarg.kh = ph->kh;
 
-		iov[1].iov_base = &outarg;
-		iov[1].iov_len = sizeof(outarg);
+        iov[1].iov_base = &outarg;
+        iov[1].iov_len = sizeof(outarg);
 
-		return send_notify_iov(ph->se, FUSE_NOTIFY_POLL, iov, 2);
-	} else {
-		return 0;
-	}
+        return send_notify_iov(ph->se, FUSE_NOTIFY_POLL, iov, 2);
+    } else {
+        return 0;
+    }
 }
 
 int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino,
-				     off_t off, off_t len)
+                                     off_t off, off_t len)
 {
-	struct fuse_notify_inval_inode_out outarg;
-	struct iovec iov[2];
+    struct fuse_notify_inval_inode_out outarg;
+    struct iovec iov[2];
+
+    if (!se) {
+        return -EINVAL;
+    }
 
-	if (!se)
-		return -EINVAL;
+    if (se->conn.proto_major < 6 || se->conn.proto_minor < 12) {
+        return -ENOSYS;
+    }
 
-	if (se->conn.proto_major < 6 || se->conn.proto_minor < 12)
-		return -ENOSYS;
-	
-	outarg.ino = ino;
-	outarg.off = off;
-	outarg.len = len;
+    outarg.ino = ino;
+    outarg.off = off;
+    outarg.len = len;
 
-	iov[1].iov_base = &outarg;
-	iov[1].iov_len = sizeof(outarg);
+    iov[1].iov_base = &outarg;
+    iov[1].iov_len = sizeof(outarg);
 
-	return send_notify_iov(se, FUSE_NOTIFY_INVAL_INODE, iov, 2);
+    return send_notify_iov(se, FUSE_NOTIFY_INVAL_INODE, iov, 2);
 }
 
 int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent,
-				     const char *name, size_t namelen)
+                                     const char *name, size_t namelen)
 {
-	struct fuse_notify_inval_entry_out outarg;
-	struct iovec iov[3];
+    struct fuse_notify_inval_entry_out outarg;
+    struct iovec iov[3];
+
+    if (!se) {
+        return -EINVAL;
+    }
 
-	if (!se)
-		return -EINVAL;
-	
-	if (se->conn.proto_major < 6 || se->conn.proto_minor < 12)
-		return -ENOSYS;
+    if (se->conn.proto_major < 6 || se->conn.proto_minor < 12) {
+        return -ENOSYS;
+    }
 
-	outarg.parent = parent;
-	outarg.namelen = namelen;
-	outarg.padding = 0;
+    outarg.parent = parent;
+    outarg.namelen = namelen;
+    outarg.padding = 0;
 
-	iov[1].iov_base = &outarg;
-	iov[1].iov_len = sizeof(outarg);
-	iov[2].iov_base = (void *)name;
-	iov[2].iov_len = namelen + 1;
+    iov[1].iov_base = &outarg;
+    iov[1].iov_len = sizeof(outarg);
+    iov[2].iov_base = (void *)name;
+    iov[2].iov_len = namelen + 1;
 
-	return send_notify_iov(se, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
+    return send_notify_iov(se, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
 }
 
-int fuse_lowlevel_notify_delete(struct fuse_session *se,
-				fuse_ino_t parent, fuse_ino_t child,
-				const char *name, size_t namelen)
+int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent,
+                                fuse_ino_t child, const char *name,
+                                size_t namelen)
 {
-	struct fuse_notify_delete_out outarg;
-	struct iovec iov[3];
+    struct fuse_notify_delete_out outarg;
+    struct iovec iov[3];
 
-	if (!se)
-		return -EINVAL;
+    if (!se) {
+        return -EINVAL;
+    }
 
-	if (se->conn.proto_major < 6 || se->conn.proto_minor < 18)
-		return -ENOSYS;
+    if (se->conn.proto_major < 6 || se->conn.proto_minor < 18) {
+        return -ENOSYS;
+    }
 
-	outarg.parent = parent;
-	outarg.child = child;
-	outarg.namelen = namelen;
-	outarg.padding = 0;
+    outarg.parent = parent;
+    outarg.child = child;
+    outarg.namelen = namelen;
+    outarg.padding = 0;
 
-	iov[1].iov_base = &outarg;
-	iov[1].iov_len = sizeof(outarg);
-	iov[2].iov_base = (void *)name;
-	iov[2].iov_len = namelen + 1;
+    iov[1].iov_base = &outarg;
+    iov[1].iov_len = sizeof(outarg);
+    iov[2].iov_base = (void *)name;
+    iov[2].iov_len = namelen + 1;
 
-	return send_notify_iov(se, FUSE_NOTIFY_DELETE, iov, 3);
+    return send_notify_iov(se, FUSE_NOTIFY_DELETE, iov, 3);
 }
 
 int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
-			       off_t offset, struct fuse_bufvec *bufv,
-			       enum fuse_buf_copy_flags flags)
+                               off_t offset, struct fuse_bufvec *bufv,
+                               enum fuse_buf_copy_flags flags)
 {
-	struct fuse_out_header out;
-	struct fuse_notify_store_out outarg;
-	struct iovec iov[3];
-	size_t size = fuse_buf_size(bufv);
-	int res;
+    struct fuse_out_header out;
+    struct fuse_notify_store_out outarg;
+    struct iovec iov[3];
+    size_t size = fuse_buf_size(bufv);
+    int res;
 
-	if (!se)
-		return -EINVAL;
+    if (!se) {
+        return -EINVAL;
+    }
 
-	if (se->conn.proto_major < 6 || se->conn.proto_minor < 15)
-		return -ENOSYS;
+    if (se->conn.proto_major < 6 || se->conn.proto_minor < 15) {
+        return -ENOSYS;
+    }
 
-	out.unique = 0;
-	out.error = FUSE_NOTIFY_STORE;
+    out.unique = 0;
+    out.error = FUSE_NOTIFY_STORE;
 
-	outarg.nodeid = ino;
-	outarg.offset = offset;
-	outarg.size = size;
-	outarg.padding = 0;
+    outarg.nodeid = ino;
+    outarg.offset = offset;
+    outarg.size = size;
+    outarg.padding = 0;
 
-	iov[0].iov_base = &out;
-	iov[0].iov_len = sizeof(out);
-	iov[1].iov_base = &outarg;
-	iov[1].iov_len = sizeof(outarg);
+    iov[0].iov_base = &out;
+    iov[0].iov_len = sizeof(out);
+    iov[1].iov_base = &outarg;
+    iov[1].iov_len = sizeof(outarg);
 
-	res = fuse_send_data_iov(se, NULL, iov, 2, bufv, flags);
-	if (res > 0)
-		res = -res;
+    res = fuse_send_data_iov(se, NULL, iov, 2, bufv, flags);
+    if (res > 0) {
+        res = -res;
+    }
 
-	return res;
+    return res;
 }
 
 struct fuse_retrieve_req {
-	struct fuse_notify_req nreq;
-	void *cookie;
+    struct fuse_notify_req nreq;
+    void *cookie;
 };
 
-static void fuse_ll_retrieve_reply(struct fuse_notify_req *nreq,
-				   fuse_req_t req, fuse_ino_t ino,
-				   const void *inarg,
-				   const struct fuse_buf *ibuf)
-{
-	struct fuse_session *se = req->se;
-	struct fuse_retrieve_req *rreq =
-		container_of(nreq, struct fuse_retrieve_req, nreq);
-	const struct fuse_notify_retrieve_in *arg = inarg;
-	struct fuse_bufvec bufv = {
-		.buf[0] = *ibuf,
-		.count = 1,
-	};
-
-	if (!(bufv.buf[0].flags & FUSE_BUF_IS_FD))
-		bufv.buf[0].mem = PARAM(arg);
-
-	bufv.buf[0].size -= sizeof(struct fuse_in_header) +
-		sizeof(struct fuse_notify_retrieve_in);
-
-	if (bufv.buf[0].size < arg->size) {
-		fuse_log(FUSE_LOG_ERR, "fuse: retrieve reply: buffer size too small\n");
-		fuse_reply_none(req);
-		goto out;
-	}
-	bufv.buf[0].size = arg->size;
-
-	if (se->op.retrieve_reply) {
-		se->op.retrieve_reply(req, rreq->cookie, ino,
-					  arg->offset, &bufv);
-	} else {
-		fuse_reply_none(req);
-	}
+static void fuse_ll_retrieve_reply(struct fuse_notify_req *nreq, fuse_req_t req,
+                                   fuse_ino_t ino, const void *inarg,
+                                   const struct fuse_buf *ibuf)
+{
+    struct fuse_session *se = req->se;
+    struct fuse_retrieve_req *rreq =
+        container_of(nreq, struct fuse_retrieve_req, nreq);
+    const struct fuse_notify_retrieve_in *arg = inarg;
+    struct fuse_bufvec bufv = {
+        .buf[0] = *ibuf,
+        .count = 1,
+    };
+
+    if (!(bufv.buf[0].flags & FUSE_BUF_IS_FD)) {
+        bufv.buf[0].mem = PARAM(arg);
+    }
+
+    bufv.buf[0].size -=
+        sizeof(struct fuse_in_header) + sizeof(struct fuse_notify_retrieve_in);
+
+    if (bufv.buf[0].size < arg->size) {
+        fuse_log(FUSE_LOG_ERR, "fuse: retrieve reply: buffer size too small\n");
+        fuse_reply_none(req);
+        goto out;
+    }
+    bufv.buf[0].size = arg->size;
+
+    if (se->op.retrieve_reply) {
+        se->op.retrieve_reply(req, rreq->cookie, ino, arg->offset, &bufv);
+    } else {
+        fuse_reply_none(req);
+    }
 out:
-	free(rreq);
+    free(rreq);
 }
 
 int fuse_lowlevel_notify_retrieve(struct fuse_session *se, fuse_ino_t ino,
-				  size_t size, off_t offset, void *cookie)
+                                  size_t size, off_t offset, void *cookie)
 {
-	struct fuse_notify_retrieve_out outarg;
-	struct iovec iov[2];
-	struct fuse_retrieve_req *rreq;
-	int err;
+    struct fuse_notify_retrieve_out outarg;
+    struct iovec iov[2];
+    struct fuse_retrieve_req *rreq;
+    int err;
 
-	if (!se)
-		return -EINVAL;
+    if (!se) {
+        return -EINVAL;
+    }
 
-	if (se->conn.proto_major < 6 || se->conn.proto_minor < 15)
-		return -ENOSYS;
+    if (se->conn.proto_major < 6 || se->conn.proto_minor < 15) {
+        return -ENOSYS;
+    }
 
-	rreq = malloc(sizeof(*rreq));
-	if (rreq == NULL)
-		return -ENOMEM;
+    rreq = malloc(sizeof(*rreq));
+    if (rreq == NULL) {
+        return -ENOMEM;
+    }
 
-	pthread_mutex_lock(&se->lock);
-	rreq->cookie = cookie;
-	rreq->nreq.unique = se->notify_ctr++;
-	rreq->nreq.reply = fuse_ll_retrieve_reply;
-	list_add_nreq(&rreq->nreq, &se->notify_list);
-	pthread_mutex_unlock(&se->lock);
+    pthread_mutex_lock(&se->lock);
+    rreq->cookie = cookie;
+    rreq->nreq.unique = se->notify_ctr++;
+    rreq->nreq.reply = fuse_ll_retrieve_reply;
+    list_add_nreq(&rreq->nreq, &se->notify_list);
+    pthread_mutex_unlock(&se->lock);
 
-	outarg.notify_unique = rreq->nreq.unique;
-	outarg.nodeid = ino;
-	outarg.offset = offset;
-	outarg.size = size;
-	outarg.padding = 0;
+    outarg.notify_unique = rreq->nreq.unique;
+    outarg.nodeid = ino;
+    outarg.offset = offset;
+    outarg.size = size;
+    outarg.padding = 0;
 
-	iov[1].iov_base = &outarg;
-	iov[1].iov_len = sizeof(outarg);
+    iov[1].iov_base = &outarg;
+    iov[1].iov_len = sizeof(outarg);
 
-	err = send_notify_iov(se, FUSE_NOTIFY_RETRIEVE, iov, 2);
-	if (err) {
-		pthread_mutex_lock(&se->lock);
-		list_del_nreq(&rreq->nreq);
-		pthread_mutex_unlock(&se->lock);
-		free(rreq);
-	}
+    err = send_notify_iov(se, FUSE_NOTIFY_RETRIEVE, iov, 2);
+    if (err) {
+        pthread_mutex_lock(&se->lock);
+        list_del_nreq(&rreq->nreq);
+        pthread_mutex_unlock(&se->lock);
+        free(rreq);
+    }
 
-	return err;
+    return err;
 }
 
 void *fuse_req_userdata(fuse_req_t req)
 {
-	return req->se->userdata;
+    return req->se->userdata;
 }
 
 const struct fuse_ctx *fuse_req_ctx(fuse_req_t req)
 {
-	return &req->ctx;
+    return &req->ctx;
 }
 
 void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
-			     void *data)
+                             void *data)
 {
-	pthread_mutex_lock(&req->lock);
-	pthread_mutex_lock(&req->se->lock);
-	req->u.ni.func = func;
-	req->u.ni.data = data;
-	pthread_mutex_unlock(&req->se->lock);
-	if (req->interrupted && func)
-		func(req, data);
-	pthread_mutex_unlock(&req->lock);
+    pthread_mutex_lock(&req->lock);
+    pthread_mutex_lock(&req->se->lock);
+    req->u.ni.func = func;
+    req->u.ni.data = data;
+    pthread_mutex_unlock(&req->se->lock);
+    if (req->interrupted && func) {
+        func(req, data);
+    }
+    pthread_mutex_unlock(&req->lock);
 }
 
 int fuse_req_interrupted(fuse_req_t req)
 {
-	int interrupted;
+    int interrupted;
 
-	pthread_mutex_lock(&req->se->lock);
-	interrupted = req->interrupted;
-	pthread_mutex_unlock(&req->se->lock);
+    pthread_mutex_lock(&req->se->lock);
+    interrupted = req->interrupted;
+    pthread_mutex_unlock(&req->se->lock);
 
-	return interrupted;
+    return interrupted;
 }
 
 static struct {
-	void (*func)(fuse_req_t, fuse_ino_t, const void *);
-	const char *name;
+    void (*func)(fuse_req_t, fuse_ino_t, const void *);
+    const char *name;
 } fuse_ll_ops[] = {
-	[FUSE_LOOKUP]	   = { do_lookup,      "LOOKUP"	     },
-	[FUSE_FORGET]	   = { do_forget,      "FORGET"	     },
-	[FUSE_GETATTR]	   = { do_getattr,     "GETATTR"     },
-	[FUSE_SETATTR]	   = { do_setattr,     "SETATTR"     },
-	[FUSE_READLINK]	   = { do_readlink,    "READLINK"    },
-	[FUSE_SYMLINK]	   = { do_symlink,     "SYMLINK"     },
-	[FUSE_MKNOD]	   = { do_mknod,       "MKNOD"	     },
-	[FUSE_MKDIR]	   = { do_mkdir,       "MKDIR"	     },
-	[FUSE_UNLINK]	   = { do_unlink,      "UNLINK"	     },
-	[FUSE_RMDIR]	   = { do_rmdir,       "RMDIR"	     },
-	[FUSE_RENAME]	   = { do_rename,      "RENAME"	     },
-	[FUSE_LINK]	   = { do_link,	       "LINK"	     },
-	[FUSE_OPEN]	   = { do_open,	       "OPEN"	     },
-	[FUSE_READ]	   = { do_read,	       "READ"	     },
-	[FUSE_WRITE]	   = { do_write,       "WRITE"	     },
-	[FUSE_STATFS]	   = { do_statfs,      "STATFS"	     },
-	[FUSE_RELEASE]	   = { do_release,     "RELEASE"     },
-	[FUSE_FSYNC]	   = { do_fsync,       "FSYNC"	     },
-	[FUSE_SETXATTR]	   = { do_setxattr,    "SETXATTR"    },
-	[FUSE_GETXATTR]	   = { do_getxattr,    "GETXATTR"    },
-	[FUSE_LISTXATTR]   = { do_listxattr,   "LISTXATTR"   },
-	[FUSE_REMOVEXATTR] = { do_removexattr, "REMOVEXATTR" },
-	[FUSE_FLUSH]	   = { do_flush,       "FLUSH"	     },
-	[FUSE_INIT]	   = { do_init,	       "INIT"	     },
-	[FUSE_OPENDIR]	   = { do_opendir,     "OPENDIR"     },
-	[FUSE_READDIR]	   = { do_readdir,     "READDIR"     },
-	[FUSE_RELEASEDIR]  = { do_releasedir,  "RELEASEDIR"  },
-	[FUSE_FSYNCDIR]	   = { do_fsyncdir,    "FSYNCDIR"    },
-	[FUSE_GETLK]	   = { do_getlk,       "GETLK"	     },
-	[FUSE_SETLK]	   = { do_setlk,       "SETLK"	     },
-	[FUSE_SETLKW]	   = { do_setlkw,      "SETLKW"	     },
-	[FUSE_ACCESS]	   = { do_access,      "ACCESS"	     },
-	[FUSE_CREATE]	   = { do_create,      "CREATE"	     },
-	[FUSE_INTERRUPT]   = { do_interrupt,   "INTERRUPT"   },
-	[FUSE_BMAP]	   = { do_bmap,	       "BMAP"	     },
-	[FUSE_IOCTL]	   = { do_ioctl,       "IOCTL"	     },
-	[FUSE_POLL]	   = { do_poll,        "POLL"	     },
-	[FUSE_FALLOCATE]   = { do_fallocate,   "FALLOCATE"   },
-	[FUSE_DESTROY]	   = { do_destroy,     "DESTROY"     },
-	[FUSE_NOTIFY_REPLY] = { (void *) 1,    "NOTIFY_REPLY" },
-	[FUSE_BATCH_FORGET] = { do_batch_forget, "BATCH_FORGET" },
-	[FUSE_READDIRPLUS] = { do_readdirplus,	"READDIRPLUS"},
-	[FUSE_RENAME2]     = { do_rename2,      "RENAME2"    },
-	[FUSE_COPY_FILE_RANGE] = { do_copy_file_range, "COPY_FILE_RANGE" },
-	[FUSE_LSEEK]	   = { do_lseek,       "LSEEK"	     },
+    [FUSE_LOOKUP] = { do_lookup, "LOOKUP" },
+    [FUSE_FORGET] = { do_forget, "FORGET" },
+    [FUSE_GETATTR] = { do_getattr, "GETATTR" },
+    [FUSE_SETATTR] = { do_setattr, "SETATTR" },
+    [FUSE_READLINK] = { do_readlink, "READLINK" },
+    [FUSE_SYMLINK] = { do_symlink, "SYMLINK" },
+    [FUSE_MKNOD] = { do_mknod, "MKNOD" },
+    [FUSE_MKDIR] = { do_mkdir, "MKDIR" },
+    [FUSE_UNLINK] = { do_unlink, "UNLINK" },
+    [FUSE_RMDIR] = { do_rmdir, "RMDIR" },
+    [FUSE_RENAME] = { do_rename, "RENAME" },
+    [FUSE_LINK] = { do_link, "LINK" },
+    [FUSE_OPEN] = { do_open, "OPEN" },
+    [FUSE_READ] = { do_read, "READ" },
+    [FUSE_WRITE] = { do_write, "WRITE" },
+    [FUSE_STATFS] = { do_statfs, "STATFS" },
+    [FUSE_RELEASE] = { do_release, "RELEASE" },
+    [FUSE_FSYNC] = { do_fsync, "FSYNC" },
+    [FUSE_SETXATTR] = { do_setxattr, "SETXATTR" },
+    [FUSE_GETXATTR] = { do_getxattr, "GETXATTR" },
+    [FUSE_LISTXATTR] = { do_listxattr, "LISTXATTR" },
+    [FUSE_REMOVEXATTR] = { do_removexattr, "REMOVEXATTR" },
+    [FUSE_FLUSH] = { do_flush, "FLUSH" },
+    [FUSE_INIT] = { do_init, "INIT" },
+    [FUSE_OPENDIR] = { do_opendir, "OPENDIR" },
+    [FUSE_READDIR] = { do_readdir, "READDIR" },
+    [FUSE_RELEASEDIR] = { do_releasedir, "RELEASEDIR" },
+    [FUSE_FSYNCDIR] = { do_fsyncdir, "FSYNCDIR" },
+    [FUSE_GETLK] = { do_getlk, "GETLK" },
+    [FUSE_SETLK] = { do_setlk, "SETLK" },
+    [FUSE_SETLKW] = { do_setlkw, "SETLKW" },
+    [FUSE_ACCESS] = { do_access, "ACCESS" },
+    [FUSE_CREATE] = { do_create, "CREATE" },
+    [FUSE_INTERRUPT] = { do_interrupt, "INTERRUPT" },
+    [FUSE_BMAP] = { do_bmap, "BMAP" },
+    [FUSE_IOCTL] = { do_ioctl, "IOCTL" },
+    [FUSE_POLL] = { do_poll, "POLL" },
+    [FUSE_FALLOCATE] = { do_fallocate, "FALLOCATE" },
+    [FUSE_DESTROY] = { do_destroy, "DESTROY" },
+    [FUSE_NOTIFY_REPLY] = { (void *)1, "NOTIFY_REPLY" },
+    [FUSE_BATCH_FORGET] = { do_batch_forget, "BATCH_FORGET" },
+    [FUSE_READDIRPLUS] = { do_readdirplus, "READDIRPLUS" },
+    [FUSE_RENAME2] = { do_rename2, "RENAME2" },
+    [FUSE_COPY_FILE_RANGE] = { do_copy_file_range, "COPY_FILE_RANGE" },
+    [FUSE_LSEEK] = { do_lseek, "LSEEK" },
 };
 
 #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
 
 static const char *opname(enum fuse_opcode opcode)
 {
-	if (opcode >= FUSE_MAXOP || !fuse_ll_ops[opcode].name)
-		return "???";
-	else
-		return fuse_ll_ops[opcode].name;
+    if (opcode >= FUSE_MAXOP || !fuse_ll_ops[opcode].name) {
+        return "???";
+    } else {
+        return fuse_ll_ops[opcode].name;
+    }
 }
 
 void fuse_session_process_buf(struct fuse_session *se,
-			      const struct fuse_buf *buf)
+                              const struct fuse_buf *buf)
 {
-	fuse_session_process_buf_int(se, buf, NULL);
+    fuse_session_process_buf_int(se, buf, NULL);
 }
 
 void fuse_session_process_buf_int(struct fuse_session *se,
-				  const struct fuse_buf *buf, struct fuse_chan *ch)
-{
-	struct fuse_in_header *in;
-	const void *inarg;
-	struct fuse_req *req;
-	int err;
-
-	in = buf->mem;
-
-	if (se->debug) {
-		fuse_log(FUSE_LOG_DEBUG,
-			"unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, pid: %u\n",
-			(unsigned long long) in->unique,
-			opname((enum fuse_opcode) in->opcode), in->opcode,
-			(unsigned long long) in->nodeid, buf->size, in->pid);
-	}
-
-	req = fuse_ll_alloc_req(se);
-	if (req == NULL) {
-		struct fuse_out_header out = {
-			.unique = in->unique,
-			.error = -ENOMEM,
-		};
-		struct iovec iov = {
-			.iov_base = &out,
-			.iov_len = sizeof(struct fuse_out_header),
-		};
-
-		fuse_send_msg(se, ch, &iov, 1);
-		return;
-	}
-
-	req->unique = in->unique;
-	req->ctx.uid = in->uid;
-	req->ctx.gid = in->gid;
-	req->ctx.pid = in->pid;
-	req->ch = ch;
-
-	err = EIO;
-	if (!se->got_init) {
-		enum fuse_opcode expected;
-
-		expected = se->cuse_data ? CUSE_INIT : FUSE_INIT;
-		if (in->opcode != expected)
-			goto reply_err;
-	} else if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT)
-		goto reply_err;
-
-	err = EACCES;
-	/* Implement -o allow_root */
-	if (se->deny_others && in->uid != se->owner && in->uid != 0 &&
-		 in->opcode != FUSE_INIT && in->opcode != FUSE_READ &&
-		 in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC &&
-		 in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR &&
-		 in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR &&
-		 in->opcode != FUSE_NOTIFY_REPLY &&
-		 in->opcode != FUSE_READDIRPLUS)
-		goto reply_err;
-
-	err = ENOSYS;
-	if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func)
-		goto reply_err;
-	if (in->opcode != FUSE_INTERRUPT) {
-		struct fuse_req *intr;
-		pthread_mutex_lock(&se->lock);
-		intr = check_interrupt(se, req);
-		list_add_req(req, &se->list);
-		pthread_mutex_unlock(&se->lock);
-		if (intr)
-			fuse_reply_err(intr, EAGAIN);
-	}
-
-	inarg = (void *) &in[1];
-	if (in->opcode == FUSE_WRITE && se->op.write_buf)
-		do_write_buf(req, in->nodeid, inarg, buf);
-	else if (in->opcode == FUSE_NOTIFY_REPLY)
-		do_notify_reply(req, in->nodeid, inarg, buf);
-	else
-		fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
-
-	return;
+                                  const struct fuse_buf *buf,
+                                  struct fuse_chan *ch)
+{
+    struct fuse_in_header *in;
+    const void *inarg;
+    struct fuse_req *req;
+    int err;
+
+    in = buf->mem;
+
+    if (se->debug) {
+        fuse_log(FUSE_LOG_DEBUG,
+                 "unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, "
+                 "pid: %u\n",
+                 (unsigned long long)in->unique,
+                 opname((enum fuse_opcode)in->opcode), in->opcode,
+                 (unsigned long long)in->nodeid, buf->size, in->pid);
+    }
+
+    req = fuse_ll_alloc_req(se);
+    if (req == NULL) {
+        struct fuse_out_header out = {
+            .unique = in->unique,
+            .error = -ENOMEM,
+        };
+        struct iovec iov = {
+            .iov_base = &out,
+            .iov_len = sizeof(struct fuse_out_header),
+        };
+
+        fuse_send_msg(se, ch, &iov, 1);
+        return;
+    }
+
+    req->unique = in->unique;
+    req->ctx.uid = in->uid;
+    req->ctx.gid = in->gid;
+    req->ctx.pid = in->pid;
+    req->ch = ch;
+
+    err = EIO;
+    if (!se->got_init) {
+        enum fuse_opcode expected;
+
+        expected = se->cuse_data ? CUSE_INIT : FUSE_INIT;
+        if (in->opcode != expected) {
+            goto reply_err;
+        }
+    } else if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT) {
+        goto reply_err;
+    }
+
+    err = EACCES;
+    /* Implement -o allow_root */
+    if (se->deny_others && in->uid != se->owner && in->uid != 0 &&
+        in->opcode != FUSE_INIT && in->opcode != FUSE_READ &&
+        in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC &&
+        in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR &&
+        in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR &&
+        in->opcode != FUSE_NOTIFY_REPLY && in->opcode != FUSE_READDIRPLUS) {
+        goto reply_err;
+    }
+
+    err = ENOSYS;
+    if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func) {
+        goto reply_err;
+    }
+    if (in->opcode != FUSE_INTERRUPT) {
+        struct fuse_req *intr;
+        pthread_mutex_lock(&se->lock);
+        intr = check_interrupt(se, req);
+        list_add_req(req, &se->list);
+        pthread_mutex_unlock(&se->lock);
+        if (intr) {
+            fuse_reply_err(intr, EAGAIN);
+        }
+    }
+
+    inarg = (void *)&in[1];
+    if (in->opcode == FUSE_WRITE && se->op.write_buf) {
+        do_write_buf(req, in->nodeid, inarg, buf);
+    } else if (in->opcode == FUSE_NOTIFY_REPLY) {
+        do_notify_reply(req, in->nodeid, inarg, buf);
+    } else {
+        fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
+    }
+
+    return;
 
 reply_err:
-	fuse_reply_err(req, err);
+    fuse_reply_err(req, err);
 }
 
-#define LL_OPTION(n,o,v) \
-	{ n, offsetof(struct fuse_session, o), v }
+#define LL_OPTION(n, o, v)                     \
+    {                                          \
+        n, offsetof(struct fuse_session, o), v \
+    }
 
 static const struct fuse_opt fuse_ll_opts[] = {
-	LL_OPTION("debug", debug, 1),
-	LL_OPTION("-d", debug, 1),
-	LL_OPTION("--debug", debug, 1),
-	LL_OPTION("allow_root", deny_others, 1),
-	FUSE_OPT_END
+    LL_OPTION("debug", debug, 1), LL_OPTION("-d", debug, 1),
+    LL_OPTION("--debug", debug, 1), LL_OPTION("allow_root", deny_others, 1),
+    FUSE_OPT_END
 };
 
 void fuse_lowlevel_version(void)
 {
-	printf("using FUSE kernel interface version %i.%i\n",
-	       FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
+    printf("using FUSE kernel interface version %i.%i\n", FUSE_KERNEL_VERSION,
+           FUSE_KERNEL_MINOR_VERSION);
 }
 
 void fuse_lowlevel_help(void)
 {
-	/* These are not all options, but the ones that are
-	   potentially of interest to an end-user */
-	printf(
-"    -o allow_other         allow access by all users\n"
-"    -o allow_root          allow access by root\n"
-"    -o auto_unmount        auto unmount on process termination\n");
+    /*
+     * These are not all options, but the ones that are
+     * potentially of interest to an end-user
+     */
+    printf("    -o allow_other         allow access by all users\n"
+           "    -o allow_root          allow access by root\n"
+           "    -o auto_unmount        auto unmount on process termination\n");
 }
 
 void fuse_session_destroy(struct fuse_session *se)
 {
-	if (se->got_init && !se->got_destroy) {
-		if (se->op.destroy)
-			se->op.destroy(se->userdata);
-	}
-	pthread_mutex_destroy(&se->lock);
-	free(se->cuse_data);
-	if (se->fd != -1)
-		close(se->fd);
-	free(se);
+    if (se->got_init && !se->got_destroy) {
+        if (se->op.destroy) {
+            se->op.destroy(se->userdata);
+        }
+    }
+    pthread_mutex_destroy(&se->lock);
+    free(se->cuse_data);
+    if (se->fd != -1) {
+        close(se->fd);
+    }
+    free(se);
 }
 
 
 struct fuse_session *fuse_session_new(struct fuse_args *args,
-				      const struct fuse_lowlevel_ops *op,
-				      size_t op_size, void *userdata)
-{
-	struct fuse_session *se;
-
-	if (sizeof(struct fuse_lowlevel_ops) < op_size) {
-		fuse_log(FUSE_LOG_ERR, "fuse: warning: library too old, some operations may not work\n");
-		op_size = sizeof(struct fuse_lowlevel_ops);
-	}
-
-	if (args->argc == 0) {
-		fuse_log(FUSE_LOG_ERR, "fuse: empty argv passed to fuse_session_new().\n");
-		return NULL;
-	}
-
-	se = (struct fuse_session *) calloc(1, sizeof(struct fuse_session));
-	if (se == NULL) {
-		fuse_log(FUSE_LOG_ERR, "fuse: failed to allocate fuse object\n");
-		goto out1;
-	}
-	se->fd = -1;
-	se->conn.max_write = UINT_MAX;
-	se->conn.max_readahead = UINT_MAX;
-
-	/* Parse options */
-	if(fuse_opt_parse(args, se, fuse_ll_opts, NULL) == -1)
-		goto out2;
-	if(se->deny_others) {
-		/* Allowing access only by root is done by instructing
-		 * kernel to allow access by everyone, and then restricting
-		 * access to root and mountpoint owner in libfuse.
-		 */
-		// We may be adding the option a second time, but
-		// that doesn't hurt.
-		if(fuse_opt_add_arg(args, "-oallow_other") == -1)
-			goto out2;
-	}
-	if(args->argc == 1 &&
-	   args->argv[0][0] == '-') {
-		fuse_log(FUSE_LOG_ERR, "fuse: warning: argv[0] looks like an option, but "
-			"will be ignored\n");
-	} else if (args->argc != 1) {
-		int i;
-		fuse_log(FUSE_LOG_ERR, "fuse: unknown option(s): `");
-		for(i = 1; i < args->argc-1; i++)
-			fuse_log(FUSE_LOG_ERR, "%s ", args->argv[i]);
-		fuse_log(FUSE_LOG_ERR, "%s'\n", args->argv[i]);
-		goto out4;
-	}
-
-	se->bufsize = FUSE_MAX_MAX_PAGES * getpagesize() +
-		FUSE_BUFFER_HEADER_SIZE;
-
-	list_init_req(&se->list);
-	list_init_req(&se->interrupts);
-	list_init_nreq(&se->notify_list);
-	se->notify_ctr = 1;
-	fuse_mutex_init(&se->lock);
-
-	memcpy(&se->op, op, op_size);
-	se->owner = getuid();
-	se->userdata = userdata;
-
-	return se;
+                                      const struct fuse_lowlevel_ops *op,
+                                      size_t op_size, void *userdata)
+{
+    struct fuse_session *se;
+
+    if (sizeof(struct fuse_lowlevel_ops) < op_size) {
+        fuse_log(
+            FUSE_LOG_ERR,
+            "fuse: warning: library too old, some operations may not work\n");
+        op_size = sizeof(struct fuse_lowlevel_ops);
+    }
+
+    if (args->argc == 0) {
+        fuse_log(FUSE_LOG_ERR,
+                 "fuse: empty argv passed to fuse_session_new().\n");
+        return NULL;
+    }
+
+    se = (struct fuse_session *)calloc(1, sizeof(struct fuse_session));
+    if (se == NULL) {
+        fuse_log(FUSE_LOG_ERR, "fuse: failed to allocate fuse object\n");
+        goto out1;
+    }
+    se->fd = -1;
+    se->conn.max_write = UINT_MAX;
+    se->conn.max_readahead = UINT_MAX;
+
+    /* Parse options */
+    if (fuse_opt_parse(args, se, fuse_ll_opts, NULL) == -1) {
+        goto out2;
+    }
+    if (se->deny_others) {
+        /*
+         * Allowing access only by root is done by instructing
+         * kernel to allow access by everyone, and then restricting
+         * access to root and mountpoint owner in libfuse.
+         */
+        /*
+         * We may be adding the option a second time, but
+         * that doesn't hurt.
+         */
+        if (fuse_opt_add_arg(args, "-oallow_other") == -1) {
+            goto out2;
+        }
+    }
+    if (args->argc == 1 && args->argv[0][0] == '-') {
+        fuse_log(FUSE_LOG_ERR,
+                 "fuse: warning: argv[0] looks like an option, but "
+                 "will be ignored\n");
+    } else if (args->argc != 1) {
+        int i;
+        fuse_log(FUSE_LOG_ERR, "fuse: unknown option(s): `");
+        for (i = 1; i < args->argc - 1; i++) {
+            fuse_log(FUSE_LOG_ERR, "%s ", args->argv[i]);
+        }
+        fuse_log(FUSE_LOG_ERR, "%s'\n", args->argv[i]);
+        goto out4;
+    }
+
+    se->bufsize = FUSE_MAX_MAX_PAGES * getpagesize() + FUSE_BUFFER_HEADER_SIZE;
+
+    list_init_req(&se->list);
+    list_init_req(&se->interrupts);
+    list_init_nreq(&se->notify_list);
+    se->notify_ctr = 1;
+    fuse_mutex_init(&se->lock);
+
+    memcpy(&se->op, op, op_size);
+    se->owner = getuid();
+    se->userdata = userdata;
+
+    return se;
 
 out4:
-	fuse_opt_free_args(args);
+    fuse_opt_free_args(args);
 out2:
-	free(se);
+    free(se);
 out1:
-	return NULL;
+    return NULL;
 }
 
 int fuse_session_mount(struct fuse_session *se, const char *mountpoint)
 {
-	int fd;
-
-	/*
-	 * Make sure file descriptors 0, 1 and 2 are open, otherwise chaos
-	 * would ensue.
-	 */
-	do {
-		fd = open("/dev/null", O_RDWR);
-		if (fd > 2)
-			close(fd);
-	} while (fd >= 0 && fd <= 2);
-
-	/*
-	 * To allow FUSE daemons to run without privileges, the caller may open
-	 * /dev/fuse before launching the file system and pass on the file
-	 * descriptor by specifying /dev/fd/N as the mount point. Note that the
-	 * parent process takes care of performing the mount in this case.
-	 */
-	fd = fuse_mnt_parse_fuse_fd(mountpoint);
-	if (fd != -1) {
-		if (fcntl(fd, F_GETFD) == -1) {
-			fuse_log(FUSE_LOG_ERR,
-				"fuse: Invalid file descriptor /dev/fd/%u\n",
-				fd);
-			return -1;
-		}
-		se->fd = fd;
-		return 0;
-	}
-
-	/* Open channel */
-	fd = fuse_kern_mount(mountpoint, se->mo);
-	if (fd == -1)
-		return -1;
-	se->fd = fd;
-
-	/* Save mountpoint */
-	se->mountpoint = strdup(mountpoint);
-	if (se->mountpoint == NULL)
-		goto error_out;
-
-	return 0;
+    int fd;
+
+    /*
+     * Make sure file descriptors 0, 1 and 2 are open, otherwise chaos
+     * would ensue.
+     */
+    do {
+        fd = open("/dev/null", O_RDWR);
+        if (fd > 2) {
+            close(fd);
+        }
+    } while (fd >= 0 && fd <= 2);
+
+    /*
+     * To allow FUSE daemons to run without privileges, the caller may open
+     * /dev/fuse before launching the file system and pass on the file
+     * descriptor by specifying /dev/fd/N as the mount point. Note that the
+     * parent process takes care of performing the mount in this case.
+     */
+    fd = fuse_mnt_parse_fuse_fd(mountpoint);
+    if (fd != -1) {
+        if (fcntl(fd, F_GETFD) == -1) {
+            fuse_log(FUSE_LOG_ERR, "fuse: Invalid file descriptor /dev/fd/%u\n",
+                     fd);
+            return -1;
+        }
+        se->fd = fd;
+        return 0;
+    }
+
+    /* Open channel */
+    fd = fuse_kern_mount(mountpoint, se->mo);
+    if (fd == -1) {
+        return -1;
+    }
+    se->fd = fd;
+
+    /* Save mountpoint */
+    se->mountpoint = strdup(mountpoint);
+    if (se->mountpoint == NULL) {
+        goto error_out;
+    }
+
+    return 0;
 
 error_out:
-	fuse_kern_unmount(mountpoint, fd);
-	return -1;
+    fuse_kern_unmount(mountpoint, fd);
+    return -1;
 }
 
 int fuse_session_fd(struct fuse_session *se)
 {
-	return se->fd;
+    return se->fd;
 }
 
 void fuse_session_unmount(struct fuse_session *se)
@@ -2395,61 +2535,66 @@ void fuse_session_unmount(struct fuse_session *se)
 #ifdef linux
 int fuse_req_getgroups(fuse_req_t req, int size, gid_t list[])
 {
-	char *buf;
-	size_t bufsize = 1024;
-	char path[128];
-	int ret;
-	int fd;
-	unsigned long pid = req->ctx.pid;
-	char *s;
+    char *buf;
+    size_t bufsize = 1024;
+    char path[128];
+    int ret;
+    int fd;
+    unsigned long pid = req->ctx.pid;
+    char *s;
 
-	sprintf(path, "/proc/%lu/task/%lu/status", pid, pid);
+    sprintf(path, "/proc/%lu/task/%lu/status", pid, pid);
 
 retry:
-	buf = malloc(bufsize);
-	if (buf == NULL)
-		return -ENOMEM;
-
-	ret = -EIO;
-	fd = open(path, O_RDONLY);
-	if (fd == -1)
-		goto out_free;
-
-	ret = read(fd, buf, bufsize);
-	close(fd);
-	if (ret < 0) {
-		ret = -EIO;
-		goto out_free;
-	}
-
-	if ((size_t)ret == bufsize) {
-		free(buf);
-		bufsize *= 4;
-		goto retry;
-	}
-
-	ret = -EIO;
-	s = strstr(buf, "\nGroups:");
-	if (s == NULL)
-		goto out_free;
-
-	s += 8;
-	ret = 0;
-	while (1) {
-		char *end;
-		unsigned long val = strtoul(s, &end, 0);
-		if (end == s)
-			break;
-
-		s = end;
-		if (ret < size)
-			list[ret] = val;
-		ret++;
-	}
+    buf = malloc(bufsize);
+    if (buf == NULL) {
+        return -ENOMEM;
+    }
+
+    ret = -EIO;
+    fd = open(path, O_RDONLY);
+    if (fd == -1) {
+        goto out_free;
+    }
+
+    ret = read(fd, buf, bufsize);
+    close(fd);
+    if (ret < 0) {
+        ret = -EIO;
+        goto out_free;
+    }
+
+    if ((size_t)ret == bufsize) {
+        free(buf);
+        bufsize *= 4;
+        goto retry;
+    }
+
+    ret = -EIO;
+    s = strstr(buf, "\nGroups:");
+    if (s == NULL) {
+        goto out_free;
+    }
+
+    s += 8;
+    ret = 0;
+    while (1) {
+        char *end;
+        unsigned long val = strtoul(s, &end, 0);
+        if (end == s) {
+            break;
+        }
+
+        s = end;
+        if (ret < size) {
+            list[ret] = val;
+        }
+        ret++;
+    }
 
 out_free:
-	free(buf);
-	return ret;
+    free(buf);
+    return ret;
 }
 #else /* linux */
 /*
@@ -2457,23 +2602,25 @@ out_free:
  */
 int fuse_req_getgroups(fuse_req_t req, int size, gid_t list[])
 {
-	(void) req; (void) size; (void) list;
-	return -ENOSYS;
+    (void)req;
+    (void)size;
+    (void)list;
+    return -ENOSYS;
 }
 #endif
 
 void fuse_session_exit(struct fuse_session *se)
 {
-	se->exited = 1;
+    se->exited = 1;
 }
 
 void fuse_session_reset(struct fuse_session *se)
 {
-	se->exited = 0;
-	se->error = 0;
+    se->exited = 0;
+    se->error = 0;
 }
 
 int fuse_session_exited(struct fuse_session *se)
 {
-	return se->exited;
+    return se->exited;
 }
diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h
index eb271156e7..719730c111 100644
--- a/tools/virtiofsd/fuse_lowlevel.h
+++ b/tools/virtiofsd/fuse_lowlevel.h
@@ -1,15 +1,16 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB.
+ */
 
 #ifndef FUSE_LOWLEVEL_H_
 #define FUSE_LOWLEVEL_H_
 
-/** @file
+/**
+ * @file
  *
  * Low level API
  *
@@ -24,16 +25,16 @@
 
 #include "fuse_common.h"
 
-#include <utime.h>
 #include <fcntl.h>
-#include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/statvfs.h>
+#include <sys/types.h>
 #include <sys/uio.h>
+#include <utime.h>
 
-/* ----------------------------------------------------------- *
- * Miscellaneous definitions				       *
- * ----------------------------------------------------------- */
+/*
+ * Miscellaneous definitions
+ */
 
 /** The node ID of the root inode */
 #define FUSE_ROOT_ID 1
@@ -53,47 +54,54 @@ struct fuse_session;
 
 /** Directory entry parameters supplied to fuse_reply_entry() */
 struct fuse_entry_param {
-	/** Unique inode number
-	 *
-	 * In lookup, zero means negative entry (from version 2.5)
-	 * Returning ENOENT also means negative entry, but by setting zero
-	 * ino the kernel may cache negative entries for entry_timeout
-	 * seconds.
-	 */
-	fuse_ino_t ino;
-
-	/** Generation number for this entry.
-	 *
-	 * If the file system will be exported over NFS, the
-	 * ino/generation pairs need to be unique over the file
-	 * system's lifetime (rather than just the mount time). So if
-	 * the file system reuses an inode after it has been deleted,
-	 * it must assign a new, previously unused generation number
-	 * to the inode at the same time.
-	 *
-	 */
-	uint64_t generation;
-
-	/** Inode attributes.
-	 *
-	 * Even if attr_timeout == 0, attr must be correct. For example,
-	 * for open(), FUSE uses attr.st_size from lookup() to determine
-	 * how many bytes to request. If this value is not correct,
-	 * incorrect data will be returned.
-	 */
-	struct stat attr;
-
-	/** Validity timeout (in seconds) for inode attributes. If
-	    attributes only change as a result of requests that come
-	    through the kernel, this should be set to a very large
-	    value. */
-	double attr_timeout;
-
-	/** Validity timeout (in seconds) for the name. If directory
-	    entries are changed/deleted only as a result of requests
-	    that come through the kernel, this should be set to a very
-	    large value. */
-	double entry_timeout;
+    /**
+     * Unique inode number
+     *
+     * In lookup, zero means negative entry (from version 2.5)
+     * Returning ENOENT also means negative entry, but by setting zero
+     * ino the kernel may cache negative entries for entry_timeout
+     * seconds.
+     */
+    fuse_ino_t ino;
+
+    /**
+     * Generation number for this entry.
+     *
+     * If the file system will be exported over NFS, the
+     * ino/generation pairs need to be unique over the file
+     * system's lifetime (rather than just the mount time). So if
+     * the file system reuses an inode after it has been deleted,
+     * it must assign a new, previously unused generation number
+     * to the inode at the same time.
+     *
+     */
+    uint64_t generation;
+
+    /**
+     * Inode attributes.
+     *
+     * Even if attr_timeout == 0, attr must be correct. For example,
+     * for open(), FUSE uses attr.st_size from lookup() to determine
+     * how many bytes to request. If this value is not correct,
+     * incorrect data will be returned.
+     */
+    struct stat attr;
+
+    /**
+     * Validity timeout (in seconds) for inode attributes. If
+     *  attributes only change as a result of requests that come
+     *  through the kernel, this should be set to a very large
+     *  value.
+     */
+    double attr_timeout;
+
+    /**
+     * Validity timeout (in seconds) for the name. If directory
+     *  entries are changed/deleted only as a result of requests
+     *  that come through the kernel, this should be set to a very
+     *  large value.
+     */
+    double entry_timeout;
 };
 
 /**
@@ -105,38 +113,38 @@ struct fuse_entry_param {
  * there is no valid uid/pid/gid that could be reported.
  */
 struct fuse_ctx {
-	/** User ID of the calling process */
-	uid_t uid;
+    /** User ID of the calling process */
+    uid_t uid;
 
-	/** Group ID of the calling process */
-	gid_t gid;
+    /** Group ID of the calling process */
+    gid_t gid;
 
-	/** Thread ID of the calling process */
-	pid_t pid;
+    /** Thread ID of the calling process */
+    pid_t pid;
 
-	/** Umask of the calling process */
-	mode_t umask;
+    /** Umask of the calling process */
+    mode_t umask;
 };
 
 struct fuse_forget_data {
-	fuse_ino_t ino;
-	uint64_t nlookup;
+    fuse_ino_t ino;
+    uint64_t nlookup;
 };
 
 /* 'to_set' flags in setattr */
-#define FUSE_SET_ATTR_MODE	(1 << 0)
-#define FUSE_SET_ATTR_UID	(1 << 1)
-#define FUSE_SET_ATTR_GID	(1 << 2)
-#define FUSE_SET_ATTR_SIZE	(1 << 3)
-#define FUSE_SET_ATTR_ATIME	(1 << 4)
-#define FUSE_SET_ATTR_MTIME	(1 << 5)
-#define FUSE_SET_ATTR_ATIME_NOW	(1 << 7)
-#define FUSE_SET_ATTR_MTIME_NOW	(1 << 8)
-#define FUSE_SET_ATTR_CTIME	(1 << 10)
-
-/* ----------------------------------------------------------- *
- * Request methods and replies				       *
- * ----------------------------------------------------------- */
+#define FUSE_SET_ATTR_MODE (1 << 0)
+#define FUSE_SET_ATTR_UID (1 << 1)
+#define FUSE_SET_ATTR_GID (1 << 2)
+#define FUSE_SET_ATTR_SIZE (1 << 3)
+#define FUSE_SET_ATTR_ATIME (1 << 4)
+#define FUSE_SET_ATTR_MTIME (1 << 5)
+#define FUSE_SET_ATTR_ATIME_NOW (1 << 7)
+#define FUSE_SET_ATTR_MTIME_NOW (1 << 8)
+#define FUSE_SET_ATTR_CTIME (1 << 10)
+
+/*
+ * Request methods and replies
+ */
 
 /**
  * Low level filesystem operations
@@ -166,1075 +174,1069 @@ struct fuse_forget_data {
  * this file will not be called.
  */
 struct fuse_lowlevel_ops {
-	/**
-	 * Initialize filesystem
-	 *
-	 * This function is called when libfuse establishes
-	 * communication with the FUSE kernel module. The file system
-	 * should use this module to inspect and/or modify the
-	 * connection parameters provided in the `conn` structure.
-	 *
-	 * Note that some parameters may be overwritten by options
-	 * passed to fuse_session_new() which take precedence over the
-	 * values set in this handler.
-	 *
-	 * There's no reply to this function
-	 *
-	 * @param userdata the user data passed to fuse_session_new()
-	 */
-	void (*init) (void *userdata, struct fuse_conn_info *conn);
-
-	/**
-	 * Clean up filesystem.
-	 *
-	 * Called on filesystem exit. When this method is called, the
-	 * connection to the kernel may be gone already, so that eg. calls
-	 * to fuse_lowlevel_notify_* will fail.
-	 *
-	 * There's no reply to this function
-	 *
-	 * @param userdata the user data passed to fuse_session_new()
-	 */
-	void (*destroy) (void *userdata);
-
-	/**
-	 * Look up a directory entry by name and get its attributes.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_entry
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param parent inode number of the parent directory
-	 * @param name the name to look up
-	 */
-	void (*lookup) (fuse_req_t req, fuse_ino_t parent, const char *name);
-
-	/**
-	 * Forget about an inode
-	 *
-	 * This function is called when the kernel removes an inode
-	 * from its internal caches.
-	 *
-	 * The inode's lookup count increases by one for every call to
-	 * fuse_reply_entry and fuse_reply_create. The nlookup parameter
-	 * indicates by how much the lookup count should be decreased.
-	 *
-	 * Inodes with a non-zero lookup count may receive request from
-	 * the kernel even after calls to unlink, rmdir or (when
-	 * overwriting an existing file) rename. Filesystems must handle
-	 * such requests properly and it is recommended to defer removal
-	 * of the inode until the lookup count reaches zero. Calls to
-	 * unlink, rmdir or rename will be followed closely by forget
-	 * unless the file or directory is open, in which case the
-	 * kernel issues forget only after the release or releasedir
-	 * calls.
-	 *
-	 * Note that if a file system will be exported over NFS the
-	 * inodes lifetime must extend even beyond forget. See the
-	 * generation field in struct fuse_entry_param above.
-	 *
-	 * On unmount the lookup count for all inodes implicitly drops
-	 * to zero. It is not guaranteed that the file system will
-	 * receive corresponding forget messages for the affected
-	 * inodes.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_none
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param nlookup the number of lookups to forget
-	 */
-	void (*forget) (fuse_req_t req, fuse_ino_t ino, uint64_t nlookup);
-
-	/**
-	 * Get file attributes.
-	 *
-	 * If writeback caching is enabled, the kernel may have a
-	 * better idea of a file's length than the FUSE file system
-	 * (eg if there has been a write that extended the file size,
-	 * but that has not yet been passed to the filesystem.n
-	 *
-	 * In this case, the st_size value provided by the file system
-	 * will be ignored.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_attr
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi for future use, currently always NULL
-	 */
-	void (*getattr) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info *fi);
-
-	/**
-	 * Set file attributes
-	 *
-	 * In the 'attr' argument only members indicated by the 'to_set'
-	 * bitmask contain valid values.  Other members contain undefined
-	 * values.
-	 *
-	 * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
-	 * expected to reset the setuid and setgid bits if the file
-	 * size or owner is being changed.
-	 *
-	 * If the setattr was invoked from the ftruncate() system call
-	 * under Linux kernel versions 2.6.15 or later, the fi->fh will
-	 * contain the value set by the open method or will be undefined
-	 * if the open method didn't set any value.  Otherwise (not
-	 * ftruncate call, or kernel version earlier than 2.6.15) the fi
-	 * parameter will be NULL.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_attr
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param attr the attributes
-	 * @param to_set bit mask of attributes which should be set
-	 * @param fi file information, or NULL
-	 */
-	void (*setattr) (fuse_req_t req, fuse_ino_t ino, struct stat *attr,
-			 int to_set, struct fuse_file_info *fi);
-
-	/**
-	 * Read symbolic link
-	 *
-	 * Valid replies:
-	 *   fuse_reply_readlink
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 */
-	void (*readlink) (fuse_req_t req, fuse_ino_t ino);
-
-	/**
-	 * Create file node
-	 *
-	 * Create a regular file, character device, block device, fifo or
-	 * socket node.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_entry
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param parent inode number of the parent directory
-	 * @param name to create
-	 * @param mode file type and mode with which to create the new file
-	 * @param rdev the device number (only valid if created file is a device)
-	 */
-	void (*mknod) (fuse_req_t req, fuse_ino_t parent, const char *name,
-		       mode_t mode, dev_t rdev);
-
-	/**
-	 * Create a directory
-	 *
-	 * Valid replies:
-	 *   fuse_reply_entry
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param parent inode number of the parent directory
-	 * @param name to create
-	 * @param mode with which to create the new file
-	 */
-	void (*mkdir) (fuse_req_t req, fuse_ino_t parent, const char *name,
-		       mode_t mode);
-
-	/**
-	 * Remove a file
-	 *
-	 * If the file's inode's lookup count is non-zero, the file
-	 * system is expected to postpone any removal of the inode
-	 * until the lookup count reaches zero (see description of the
-	 * forget function).
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param parent inode number of the parent directory
-	 * @param name to remove
-	 */
-	void (*unlink) (fuse_req_t req, fuse_ino_t parent, const char *name);
-
-	/**
-	 * Remove a directory
-	 *
-	 * If the directory's inode's lookup count is non-zero, the
-	 * file system is expected to postpone any removal of the
-	 * inode until the lookup count reaches zero (see description
-	 * of the forget function).
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param parent inode number of the parent directory
-	 * @param name to remove
-	 */
-	void (*rmdir) (fuse_req_t req, fuse_ino_t parent, const char *name);
-
-	/**
-	 * Create a symbolic link
-	 *
-	 * Valid replies:
-	 *   fuse_reply_entry
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param link the contents of the symbolic link
-	 * @param parent inode number of the parent directory
-	 * @param name to create
-	 */
-	void (*symlink) (fuse_req_t req, const char *link, fuse_ino_t parent,
-			 const char *name);
-
-	/** Rename a file
-	 *
-	 * If the target exists it should be atomically replaced. If
-	 * the target's inode's lookup count is non-zero, the file
-	 * system is expected to postpone any removal of the inode
-	 * until the lookup count reaches zero (see description of the
-	 * forget function).
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure with error code EINVAL, i.e. all
-	 * future bmap requests will fail with EINVAL without being
-	 * send to the filesystem process.
-	 *
-	 * *flags* may be `RENAME_EXCHANGE` or `RENAME_NOREPLACE`. If
-	 * RENAME_NOREPLACE is specified, the filesystem must not
-	 * overwrite *newname* if it exists and return an error
-	 * instead. If `RENAME_EXCHANGE` is specified, the filesystem
-	 * must atomically exchange the two files, i.e. both must
-	 * exist and neither may be deleted.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param parent inode number of the old parent directory
-	 * @param name old name
-	 * @param newparent inode number of the new parent directory
-	 * @param newname new name
-	 */
-	void (*rename) (fuse_req_t req, fuse_ino_t parent, const char *name,
-			fuse_ino_t newparent, const char *newname,
-			unsigned int flags);
-
-	/**
-	 * Create a hard link
-	 *
-	 * Valid replies:
-	 *   fuse_reply_entry
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the old inode number
-	 * @param newparent inode number of the new parent directory
-	 * @param newname new name to create
-	 */
-	void (*link) (fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent,
-		      const char *newname);
-
-	/**
-	 * Open a file
-	 *
-	 * Open flags are available in fi->flags. The following rules
-	 * apply.
-	 *
-	 *  - Creation (O_CREAT, O_EXCL, O_NOCTTY) flags will be
-	 *    filtered out / handled by the kernel.
-	 *
-	 *  - Access modes (O_RDONLY, O_WRONLY, O_RDWR) should be used
-	 *    by the filesystem to check if the operation is
-	 *    permitted.  If the ``-o default_permissions`` mount
-	 *    option is given, this check is already done by the
-	 *    kernel before calling open() and may thus be omitted by
-	 *    the filesystem.
-	 *
-	 *  - When writeback caching is enabled, the kernel may send
-	 *    read requests even for files opened with O_WRONLY. The
-	 *    filesystem should be prepared to handle this.
-	 *
-	 *  - When writeback caching is disabled, the filesystem is
-	 *    expected to properly handle the O_APPEND flag and ensure
-	 *    that each write is appending to the end of the file.
-	 * 
-         *  - When writeback caching is enabled, the kernel will
-	 *    handle O_APPEND. However, unless all changes to the file
-	 *    come through the kernel this will not work reliably. The
-	 *    filesystem should thus either ignore the O_APPEND flag
-	 *    (and let the kernel handle it), or return an error
-	 *    (indicating that reliably O_APPEND is not available).
-	 *
-	 * Filesystem may store an arbitrary file handle (pointer,
-	 * index, etc) in fi->fh, and use this in other all other file
-	 * operations (read, write, flush, release, fsync).
-	 *
-	 * Filesystem may also implement stateless file I/O and not store
-	 * anything in fi->fh.
-	 *
-	 * There are also some flags (direct_io, keep_cache) which the
-	 * filesystem may set in fi, to change the way the file is opened.
-	 * See fuse_file_info structure in <fuse_common.h> for more details.
-	 *
-	 * If this request is answered with an error code of ENOSYS
-	 * and FUSE_CAP_NO_OPEN_SUPPORT is set in
-	 * `fuse_conn_info.capable`, this is treated as success and
-	 * future calls to open and release will also succeed without being
-	 * sent to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_open
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 */
-	void (*open) (fuse_req_t req, fuse_ino_t ino,
-		      struct fuse_file_info *fi);
-
-	/**
-	 * Read data
-	 *
-	 * Read should send exactly the number of bytes requested except
-	 * on EOF or error, otherwise the rest of the data will be
-	 * substituted with zeroes.  An exception to this is when the file
-	 * has been opened in 'direct_io' mode, in which case the return
-	 * value of the read system call will reflect the return value of
-	 * this operation.
-	 *
-	 * fi->fh will contain the value set by the open method, or will
-	 * be undefined if the open method didn't set any value.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_buf
-	 *   fuse_reply_iov
-	 *   fuse_reply_data
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param size number of bytes to read
-	 * @param off offset to read from
-	 * @param fi file information
-	 */
-	void (*read) (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
-		      struct fuse_file_info *fi);
-
-	/**
-	 * Write data
-	 *
-	 * Write should return exactly the number of bytes requested
-	 * except on error.  An exception to this is when the file has
-	 * been opened in 'direct_io' mode, in which case the return value
-	 * of the write system call will reflect the return value of this
-	 * operation.
-	 *
-	 * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
-	 * expected to reset the setuid and setgid bits.
-	 *
-	 * fi->fh will contain the value set by the open method, or will
-	 * be undefined if the open method didn't set any value.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_write
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param buf data to write
-	 * @param size number of bytes to write
-	 * @param off offset to write to
-	 * @param fi file information
-	 */
-	void (*write) (fuse_req_t req, fuse_ino_t ino, const char *buf,
-		       size_t size, off_t off, struct fuse_file_info *fi);
-
-	/**
-	 * Flush method
-	 *
-	 * This is called on each close() of the opened file.
-	 *
-	 * Since file descriptors can be duplicated (dup, dup2, fork), for
-	 * one open call there may be many flush calls.
-	 *
-	 * Filesystems shouldn't assume that flush will always be called
-	 * after some writes, or that if will be called at all.
-	 *
-	 * fi->fh will contain the value set by the open method, or will
-	 * be undefined if the open method didn't set any value.
-	 *
-	 * NOTE: the name of the method is misleading, since (unlike
-	 * fsync) the filesystem is not forced to flush pending writes.
-	 * One reason to flush data is if the filesystem wants to return
-	 * write errors during close.  However, such use is non-portable
-	 * because POSIX does not require [close] to wait for delayed I/O to
-	 * complete.
-	 *
-	 * If the filesystem supports file locking operations (setlk,
-	 * getlk) it should remove all locks belonging to 'fi->owner'.
-	 *
-	 * If this request is answered with an error code of ENOSYS,
-	 * this is treated as success and future calls to flush() will
-	 * succeed automatically without being send to the filesystem
-	 * process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 *
-	 * [close]: http://pubs.opengroup.org/onlinepubs/9699919799/functions/close.html
-	 */
-	void (*flush) (fuse_req_t req, fuse_ino_t ino,
-		       struct fuse_file_info *fi);
-
-	/**
-	 * Release an open file
-	 *
-	 * Release is called when there are no more references to an open
-	 * file: all file descriptors are closed and all memory mappings
-	 * are unmapped.
-	 *
-	 * For every open call there will be exactly one release call (unless
-	 * the filesystem is force-unmounted).
-	 *
-	 * The filesystem may reply with an error, but error values are
-	 * not returned to close() or munmap() which triggered the
-	 * release.
-	 *
-	 * fi->fh will contain the value set by the open method, or will
-	 * be undefined if the open method didn't set any value.
-	 * fi->flags will contain the same flags as for open.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 */
-	void (*release) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info *fi);
-
-	/**
-	 * Synchronize file contents
-	 *
-	 * If the datasync parameter is non-zero, then only the user data
-	 * should be flushed, not the meta data.
-	 *
-	 * If this request is answered with an error code of ENOSYS,
-	 * this is treated as success and future calls to fsync() will
-	 * succeed automatically without being send to the filesystem
-	 * process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param datasync flag indicating if only data should be flushed
-	 * @param fi file information
-	 */
-	void (*fsync) (fuse_req_t req, fuse_ino_t ino, int datasync,
-		       struct fuse_file_info *fi);
-
-	/**
-	 * Open a directory
-	 *
-	 * Filesystem may store an arbitrary file handle (pointer, index,
-	 * etc) in fi->fh, and use this in other all other directory
-	 * stream operations (readdir, releasedir, fsyncdir).
-	 *
-	 * If this request is answered with an error code of ENOSYS and
-	 * FUSE_CAP_NO_OPENDIR_SUPPORT is set in `fuse_conn_info.capable`,
-	 * this is treated as success and future calls to opendir and
-	 * releasedir will also succeed without being sent to the filesystem
-	 * process. In addition, the kernel will cache readdir results
-	 * as if opendir returned FOPEN_KEEP_CACHE | FOPEN_CACHE_DIR.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_open
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 */
-	void (*opendir) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info *fi);
-
-	/**
-	 * Read directory
-	 *
-	 * Send a buffer filled using fuse_add_direntry(), with size not
-	 * exceeding the requested size.  Send an empty buffer on end of
-	 * stream.
-	 *
-	 * fi->fh will contain the value set by the opendir method, or
-	 * will be undefined if the opendir method didn't set any value.
-	 *
-	 * Returning a directory entry from readdir() does not affect
-	 * its lookup count.
-	 *
-         * If off_t is non-zero, then it will correspond to one of the off_t
-	 * values that was previously returned by readdir() for the same
-	 * directory handle. In this case, readdir() should skip over entries
-	 * coming before the position defined by the off_t value. If entries
-	 * are added or removed while the directory handle is open, they filesystem
-	 * may still include the entries that have been removed, and may not
-	 * report the entries that have been created. However, addition or
-	 * removal of entries must never cause readdir() to skip over unrelated
-	 * entries or to report them more than once. This means
-	 * that off_t can not be a simple index that enumerates the entries
-	 * that have been returned but must contain sufficient information to
-	 * uniquely determine the next directory entry to return even when the
-	 * set of entries is changing.
-	 *
-	 * The function does not have to report the '.' and '..'
-	 * entries, but is allowed to do so. Note that, if readdir does
-	 * not return '.' or '..', they will not be implicitly returned,
-	 * and this behavior is observable by the caller.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_buf
-	 *   fuse_reply_data
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param size maximum number of bytes to send
-	 * @param off offset to continue reading the directory stream
-	 * @param fi file information
-	 */
-	void (*readdir) (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
-			 struct fuse_file_info *fi);
-
-	/**
-	 * Release an open directory
-	 *
-	 * For every opendir call there will be exactly one releasedir
-	 * call (unless the filesystem is force-unmounted).
-	 *
-	 * fi->fh will contain the value set by the opendir method, or
-	 * will be undefined if the opendir method didn't set any value.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 */
-	void (*releasedir) (fuse_req_t req, fuse_ino_t ino,
-			    struct fuse_file_info *fi);
-
-	/**
-	 * Synchronize directory contents
-	 *
-	 * If the datasync parameter is non-zero, then only the directory
-	 * contents should be flushed, not the meta data.
-	 *
-	 * fi->fh will contain the value set by the opendir method, or
-	 * will be undefined if the opendir method didn't set any value.
-	 *
-	 * If this request is answered with an error code of ENOSYS,
-	 * this is treated as success and future calls to fsyncdir() will
-	 * succeed automatically without being send to the filesystem
-	 * process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param datasync flag indicating if only data should be flushed
-	 * @param fi file information
-	 */
-	void (*fsyncdir) (fuse_req_t req, fuse_ino_t ino, int datasync,
-			  struct fuse_file_info *fi);
-
-	/**
-	 * Get file system statistics
-	 *
-	 * Valid replies:
-	 *   fuse_reply_statfs
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number, zero means "undefined"
-	 */
-	void (*statfs) (fuse_req_t req, fuse_ino_t ino);
-
-	/**
-	 * Set an extended attribute
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
-	 * future setxattr() requests will fail with EOPNOTSUPP without being
-	 * send to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 */
-	void (*setxattr) (fuse_req_t req, fuse_ino_t ino, const char *name,
-			  const char *value, size_t size, int flags);
-
-	/**
-	 * Get an extended attribute
-	 *
-	 * If size is zero, the size of the value should be sent with
-	 * fuse_reply_xattr.
-	 *
-	 * If the size is non-zero, and the value fits in the buffer, the
-	 * value should be sent with fuse_reply_buf.
-	 *
-	 * If the size is too small for the value, the ERANGE error should
-	 * be sent.
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
-	 * future getxattr() requests will fail with EOPNOTSUPP without being
-	 * send to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_buf
-	 *   fuse_reply_data
-	 *   fuse_reply_xattr
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param name of the extended attribute
-	 * @param size maximum size of the value to send
-	 */
-	void (*getxattr) (fuse_req_t req, fuse_ino_t ino, const char *name,
-			  size_t size);
-
-	/**
-	 * List extended attribute names
-	 *
-	 * If size is zero, the total size of the attribute list should be
-	 * sent with fuse_reply_xattr.
-	 *
-	 * If the size is non-zero, and the null character separated
-	 * attribute list fits in the buffer, the list should be sent with
-	 * fuse_reply_buf.
-	 *
-	 * If the size is too small for the list, the ERANGE error should
-	 * be sent.
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
-	 * future listxattr() requests will fail with EOPNOTSUPP without being
-	 * send to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_buf
-	 *   fuse_reply_data
-	 *   fuse_reply_xattr
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param size maximum size of the list to send
-	 */
-	void (*listxattr) (fuse_req_t req, fuse_ino_t ino, size_t size);
-
-	/**
-	 * Remove an extended attribute
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
-	 * future removexattr() requests will fail with EOPNOTSUPP without being
-	 * send to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param name of the extended attribute
-	 */
-	void (*removexattr) (fuse_req_t req, fuse_ino_t ino, const char *name);
-
-	/**
-	 * Check file access permissions
-	 *
-	 * This will be called for the access() and chdir() system
-	 * calls.  If the 'default_permissions' mount option is given,
-	 * this method is not called.
-	 *
-	 * This method is not called under Linux kernel versions 2.4.x
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent success, i.e. this and all future access()
-	 * requests will succeed without being send to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param mask requested access mode
-	 */
-	void (*access) (fuse_req_t req, fuse_ino_t ino, int mask);
-
-	/**
-	 * Create and open a file
-	 *
-	 * If the file does not exist, first create it with the specified
-	 * mode, and then open it.
-	 *
-	 * See the description of the open handler for more
-	 * information.
-	 *
-	 * If this method is not implemented or under Linux kernel
-	 * versions earlier than 2.6.15, the mknod() and open() methods
-	 * will be called instead.
-	 *
-	 * If this request is answered with an error code of ENOSYS, the handler
-	 * is treated as not implemented (i.e., for this and future requests the
-	 * mknod() and open() handlers will be called instead).
-	 *
-	 * Valid replies:
-	 *   fuse_reply_create
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param parent inode number of the parent directory
-	 * @param name to create
-	 * @param mode file type and mode with which to create the new file
-	 * @param fi file information
-	 */
-	void (*create) (fuse_req_t req, fuse_ino_t parent, const char *name,
-			mode_t mode, struct fuse_file_info *fi);
-
-	/**
-	 * Test for a POSIX file lock
-	 *
-	 * Valid replies:
-	 *   fuse_reply_lock
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 * @param lock the region/type to test
-	 */
-	void (*getlk) (fuse_req_t req, fuse_ino_t ino,
-		       struct fuse_file_info *fi, struct flock *lock);
-
-	/**
-	 * Acquire, modify or release a POSIX file lock
-	 *
-	 * For POSIX threads (NPTL) there's a 1-1 relation between pid and
-	 * owner, but otherwise this is not always the case.  For checking
-	 * lock ownership, 'fi->owner' must be used.  The l_pid field in
-	 * 'struct flock' should only be used to fill in this field in
-	 * getlk().
-	 *
-	 * Note: if the locking methods are not implemented, the kernel
-	 * will still allow file locking to work locally.  Hence these are
-	 * only interesting for network filesystems and similar.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 * @param lock the region/type to set
-	 * @param sleep locking operation may sleep
-	 */
-	void (*setlk) (fuse_req_t req, fuse_ino_t ino,
-		       struct fuse_file_info *fi,
-		       struct flock *lock, int sleep);
-
-	/**
-	 * Map block index within file to block index within device
-	 *
-	 * Note: This makes sense only for block device backed filesystems
-	 * mounted with the 'blkdev' option
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure, i.e. all future bmap() requests will
-	 * fail with the same error code without being send to the filesystem
-	 * process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_bmap
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param blocksize unit of block index
-	 * @param idx block index within file
-	 */
-	void (*bmap) (fuse_req_t req, fuse_ino_t ino, size_t blocksize,
-		      uint64_t idx);
-
-	/**
-	 * Ioctl
-	 *
-	 * Note: For unrestricted ioctls (not allowed for FUSE
-	 * servers), data in and out areas can be discovered by giving
-	 * iovs and setting FUSE_IOCTL_RETRY in *flags*.  For
-	 * restricted ioctls, kernel prepares in/out data area
-	 * according to the information encoded in cmd.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_ioctl_retry
-	 *   fuse_reply_ioctl
-	 *   fuse_reply_ioctl_iov
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param cmd ioctl command
-	 * @param arg ioctl argument
-	 * @param fi file information
-	 * @param flags for FUSE_IOCTL_* flags
-	 * @param in_buf data fetched from the caller
-	 * @param in_bufsz number of fetched bytes
-	 * @param out_bufsz maximum size of output data
-	 *
-	 * Note : the unsigned long request submitted by the application
-	 * is truncated to 32 bits.
-	 */
-	void (*ioctl) (fuse_req_t req, fuse_ino_t ino, unsigned int cmd,
-		       void *arg, struct fuse_file_info *fi, unsigned flags,
-		       const void *in_buf, size_t in_bufsz, size_t out_bufsz);
-
-	/**
-	 * Poll for IO readiness
-	 *
-	 * Note: If ph is non-NULL, the client should notify
-	 * when IO readiness events occur by calling
-	 * fuse_lowlevel_notify_poll() with the specified ph.
-	 *
-	 * Regardless of the number of times poll with a non-NULL ph
-	 * is received, single notification is enough to clear all.
-	 * Notifying more times incurs overhead but doesn't harm
-	 * correctness.
-	 *
-	 * The callee is responsible for destroying ph with
-	 * fuse_pollhandle_destroy() when no longer in use.
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as success (with a kernel-defined default poll-mask) and
-	 * future calls to pull() will succeed the same way without being send
-	 * to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_poll
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 * @param ph poll handle to be used for notification
-	 */
-	void (*poll) (fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi,
-		      struct fuse_pollhandle *ph);
-
-	/**
-	 * Write data made available in a buffer
-	 *
-	 * This is a more generic version of the ->write() method.  If
-	 * FUSE_CAP_SPLICE_READ is set in fuse_conn_info.want and the
-	 * kernel supports splicing from the fuse device, then the
-	 * data will be made available in pipe for supporting zero
-	 * copy data transfer.
-	 *
-	 * buf->count is guaranteed to be one (and thus buf->idx is
-	 * always zero). The write_buf handler must ensure that
-	 * bufv->off is correctly updated (reflecting the number of
-	 * bytes read from bufv->buf[0]).
-	 *
-	 * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
-	 * expected to reset the setuid and setgid bits.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_write
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param bufv buffer containing the data
-	 * @param off offset to write to
-	 * @param fi file information
-	 */
-	void (*write_buf) (fuse_req_t req, fuse_ino_t ino,
-			   struct fuse_bufvec *bufv, off_t off,
-			   struct fuse_file_info *fi);
-
-	/**
-	 * Callback function for the retrieve request
-	 *
-	 * Valid replies:
-	 *	fuse_reply_none
-	 *
-	 * @param req request handle
-	 * @param cookie user data supplied to fuse_lowlevel_notify_retrieve()
-	 * @param ino the inode number supplied to fuse_lowlevel_notify_retrieve()
-	 * @param offset the offset supplied to fuse_lowlevel_notify_retrieve()
-	 * @param bufv the buffer containing the returned data
-	 */
-	void (*retrieve_reply) (fuse_req_t req, void *cookie, fuse_ino_t ino,
-				off_t offset, struct fuse_bufvec *bufv);
-
-	/**
-	 * Forget about multiple inodes
-	 *
-	 * See description of the forget function for more
-	 * information.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_none
-	 *
-	 * @param req request handle
-	 */
-	void (*forget_multi) (fuse_req_t req, size_t count,
-			      struct fuse_forget_data *forgets);
-
-	/**
-	 * Acquire, modify or release a BSD file lock
-	 *
-	 * Note: if the locking methods are not implemented, the kernel
-	 * will still allow file locking to work locally.  Hence these are
-	 * only interesting for network filesystems and similar.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param fi file information
-	 * @param op the locking operation, see flock(2)
-	 */
-	void (*flock) (fuse_req_t req, fuse_ino_t ino,
-		       struct fuse_file_info *fi, int op);
-
-	/**
-	 * Allocate requested space. If this function returns success then
-	 * subsequent writes to the specified range shall not fail due to the lack
-	 * of free space on the file system storage media.
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
-	 * future fallocate() requests will fail with EOPNOTSUPP without being
-	 * send to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param offset starting point for allocated region
-	 * @param length size of allocated region
-	 * @param mode determines the operation to be performed on the given range,
-	 *             see fallocate(2)
-	 */
-	void (*fallocate) (fuse_req_t req, fuse_ino_t ino, int mode,
-		       off_t offset, off_t length, struct fuse_file_info *fi);
-
-	/**
-	 * Read directory with attributes
-	 *
-	 * Send a buffer filled using fuse_add_direntry_plus(), with size not
-	 * exceeding the requested size.  Send an empty buffer on end of
-	 * stream.
-	 *
-	 * fi->fh will contain the value set by the opendir method, or
-	 * will be undefined if the opendir method didn't set any value.
-	 *
-	 * In contrast to readdir() (which does not affect the lookup counts),
-	 * the lookup count of every entry returned by readdirplus(), except "."
-	 * and "..", is incremented by one.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_buf
-	 *   fuse_reply_data
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param size maximum number of bytes to send
-	 * @param off offset to continue reading the directory stream
-	 * @param fi file information
-	 */
-	void (*readdirplus) (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
-			 struct fuse_file_info *fi);
-
-	/**
-	 * Copy a range of data from one file to another
-	 *
-	 * Performs an optimized copy between two file descriptors without the
-	 * additional cost of transferring data through the FUSE kernel module
-	 * to user space (glibc) and then back into the FUSE filesystem again.
-	 *
-	 * In case this method is not implemented, glibc falls back to reading
-	 * data from the source and writing to the destination. Effectively
-	 * doing an inefficient copy of the data.
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
-	 * future copy_file_range() requests will fail with EOPNOTSUPP without
-	 * being send to the filesystem process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_write
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino_in the inode number or the source file
-	 * @param off_in starting point from were the data should be read
-	 * @param fi_in file information of the source file
-	 * @param ino_out the inode number or the destination file
-	 * @param off_out starting point where the data should be written
-	 * @param fi_out file information of the destination file
-	 * @param len maximum size of the data to copy
-	 * @param flags passed along with the copy_file_range() syscall
-	 */
-	void (*copy_file_range) (fuse_req_t req, fuse_ino_t ino_in,
-				 off_t off_in, struct fuse_file_info *fi_in,
-				 fuse_ino_t ino_out, off_t off_out,
-				 struct fuse_file_info *fi_out, size_t len,
-				 int flags);
-
-	/**
-	 * Find next data or hole after the specified offset
-	 *
-	 * If this request is answered with an error code of ENOSYS, this is
-	 * treated as a permanent failure, i.e. all future lseek() requests will
-	 * fail with the same error code without being send to the filesystem
-	 * process.
-	 *
-	 * Valid replies:
-	 *   fuse_reply_lseek
-	 *   fuse_reply_err
-	 *
-	 * @param req request handle
-	 * @param ino the inode number
-	 * @param off offset to start search from
-	 * @param whence either SEEK_DATA or SEEK_HOLE
-	 * @param fi file information
-	 */
-	void (*lseek) (fuse_req_t req, fuse_ino_t ino, off_t off, int whence,
-		       struct fuse_file_info *fi);
+    /**
+     * Initialize filesystem
+     *
+     * This function is called when libfuse establishes
+     * communication with the FUSE kernel module. The file system
+     * should use this module to inspect and/or modify the
+     * connection parameters provided in the `conn` structure.
+     *
+     * Note that some parameters may be overwritten by options
+     * passed to fuse_session_new() which take precedence over the
+     * values set in this handler.
+     *
+     * There's no reply to this function
+     *
+     * @param userdata the user data passed to fuse_session_new()
+     */
+    void (*init)(void *userdata, struct fuse_conn_info *conn);
+
+    /**
+     * Clean up filesystem.
+     *
+     * Called on filesystem exit. When this method is called, the
+     * connection to the kernel may be gone already, so that eg. calls
+     * to fuse_lowlevel_notify_* will fail.
+     *
+     * There's no reply to this function
+     *
+     * @param userdata the user data passed to fuse_session_new()
+     */
+    void (*destroy)(void *userdata);
+
+    /**
+     * Look up a directory entry by name and get its attributes.
+     *
+     * Valid replies:
+     *   fuse_reply_entry
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param parent inode number of the parent directory
+     * @param name the name to look up
+     */
+    void (*lookup)(fuse_req_t req, fuse_ino_t parent, const char *name);
+
+    /**
+     * Forget about an inode
+     *
+     * This function is called when the kernel removes an inode
+     * from its internal caches.
+     *
+     * The inode's lookup count increases by one for every call to
+     * fuse_reply_entry and fuse_reply_create. The nlookup parameter
+     * indicates by how much the lookup count should be decreased.
+     *
+     * Inodes with a non-zero lookup count may receive request from
+     * the kernel even after calls to unlink, rmdir or (when
+     * overwriting an existing file) rename. Filesystems must handle
+     * such requests properly and it is recommended to defer removal
+     * of the inode until the lookup count reaches zero. Calls to
+     * unlink, rmdir or rename will be followed closely by forget
+     * unless the file or directory is open, in which case the
+     * kernel issues forget only after the release or releasedir
+     * calls.
+     *
+     * Note that if a file system will be exported over NFS the
+     * inodes lifetime must extend even beyond forget. See the
+     * generation field in struct fuse_entry_param above.
+     *
+     * On unmount the lookup count for all inodes implicitly drops
+     * to zero. It is not guaranteed that the file system will
+     * receive corresponding forget messages for the affected
+     * inodes.
+     *
+     * Valid replies:
+     *   fuse_reply_none
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param nlookup the number of lookups to forget
+     */
+    void (*forget)(fuse_req_t req, fuse_ino_t ino, uint64_t nlookup);
+
+    /**
+     * Get file attributes.
+     *
+     * If writeback caching is enabled, the kernel may have a
+     * better idea of a file's length than the FUSE file system
+     * (eg if there has been a write that extended the file size,
+     * but that has not yet been passed to the filesystem.n
+     *
+     * In this case, the st_size value provided by the file system
+     * will be ignored.
+     *
+     * Valid replies:
+     *   fuse_reply_attr
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi for future use, currently always NULL
+     */
+    void (*getattr)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi);
+
+    /**
+     * Set file attributes
+     *
+     * In the 'attr' argument only members indicated by the 'to_set'
+     * bitmask contain valid values.  Other members contain undefined
+     * values.
+     *
+     * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
+     * expected to reset the setuid and setgid bits if the file
+     * size or owner is being changed.
+     *
+     * If the setattr was invoked from the ftruncate() system call
+     * under Linux kernel versions 2.6.15 or later, the fi->fh will
+     * contain the value set by the open method or will be undefined
+     * if the open method didn't set any value.  Otherwise (not
+     * ftruncate call, or kernel version earlier than 2.6.15) the fi
+     * parameter will be NULL.
+     *
+     * Valid replies:
+     *   fuse_reply_attr
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param attr the attributes
+     * @param to_set bit mask of attributes which should be set
+     * @param fi file information, or NULL
+     */
+    void (*setattr)(fuse_req_t req, fuse_ino_t ino, struct stat *attr,
+                    int to_set, struct fuse_file_info *fi);
+
+    /**
+     * Read symbolic link
+     *
+     * Valid replies:
+     *   fuse_reply_readlink
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     */
+    void (*readlink)(fuse_req_t req, fuse_ino_t ino);
+
+    /**
+     * Create file node
+     *
+     * Create a regular file, character device, block device, fifo or
+     * socket node.
+     *
+     * Valid replies:
+     *   fuse_reply_entry
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param parent inode number of the parent directory
+     * @param name to create
+     * @param mode file type and mode with which to create the new file
+     * @param rdev the device number (only valid if created file is a device)
+     */
+    void (*mknod)(fuse_req_t req, fuse_ino_t parent, const char *name,
+                  mode_t mode, dev_t rdev);
+
+    /**
+     * Create a directory
+     *
+     * Valid replies:
+     *   fuse_reply_entry
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param parent inode number of the parent directory
+     * @param name to create
+     * @param mode with which to create the new file
+     */
+    void (*mkdir)(fuse_req_t req, fuse_ino_t parent, const char *name,
+                  mode_t mode);
+
+    /**
+     * Remove a file
+     *
+     * If the file's inode's lookup count is non-zero, the file
+     * system is expected to postpone any removal of the inode
+     * until the lookup count reaches zero (see description of the
+     * forget function).
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param parent inode number of the parent directory
+     * @param name to remove
+     */
+    void (*unlink)(fuse_req_t req, fuse_ino_t parent, const char *name);
+
+    /**
+     * Remove a directory
+     *
+     * If the directory's inode's lookup count is non-zero, the
+     * file system is expected to postpone any removal of the
+     * inode until the lookup count reaches zero (see description
+     * of the forget function).
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param parent inode number of the parent directory
+     * @param name to remove
+     */
+    void (*rmdir)(fuse_req_t req, fuse_ino_t parent, const char *name);
+
+    /**
+     * Create a symbolic link
+     *
+     * Valid replies:
+     *   fuse_reply_entry
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param link the contents of the symbolic link
+     * @param parent inode number of the parent directory
+     * @param name to create
+     */
+    void (*symlink)(fuse_req_t req, const char *link, fuse_ino_t parent,
+                    const char *name);
+
+    /**
+     * Rename a file
+     *
+     * If the target exists it should be atomically replaced. If
+     * the target's inode's lookup count is non-zero, the file
+     * system is expected to postpone any removal of the inode
+     * until the lookup count reaches zero (see description of the
+     * forget function).
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure with error code EINVAL, i.e. all
+     * future bmap requests will fail with EINVAL without being
+     * send to the filesystem process.
+     *
+     * *flags* may be `RENAME_EXCHANGE` or `RENAME_NOREPLACE`. If
+     * RENAME_NOREPLACE is specified, the filesystem must not
+     * overwrite *newname* if it exists and return an error
+     * instead. If `RENAME_EXCHANGE` is specified, the filesystem
+     * must atomically exchange the two files, i.e. both must
+     * exist and neither may be deleted.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param parent inode number of the old parent directory
+     * @param name old name
+     * @param newparent inode number of the new parent directory
+     * @param newname new name
+     */
+    void (*rename)(fuse_req_t req, fuse_ino_t parent, const char *name,
+                   fuse_ino_t newparent, const char *newname,
+                   unsigned int flags);
+
+    /**
+     * Create a hard link
+     *
+     * Valid replies:
+     *   fuse_reply_entry
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the old inode number
+     * @param newparent inode number of the new parent directory
+     * @param newname new name to create
+     */
+    void (*link)(fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent,
+                 const char *newname);
+
+    /**
+     * Open a file
+     *
+     * Open flags are available in fi->flags. The following rules
+     * apply.
+     *
+     *  - Creation (O_CREAT, O_EXCL, O_NOCTTY) flags will be
+     *    filtered out / handled by the kernel.
+     *
+     *  - Access modes (O_RDONLY, O_WRONLY, O_RDWR) should be used
+     *    by the filesystem to check if the operation is
+     *    permitted.  If the ``-o default_permissions`` mount
+     *    option is given, this check is already done by the
+     *    kernel before calling open() and may thus be omitted by
+     *    the filesystem.
+     *
+     *  - When writeback caching is enabled, the kernel may send
+     *    read requests even for files opened with O_WRONLY. The
+     *    filesystem should be prepared to handle this.
+     *
+     *  - When writeback caching is disabled, the filesystem is
+     *    expected to properly handle the O_APPEND flag and ensure
+     *    that each write is appending to the end of the file.
+     *
+     *  - When writeback caching is enabled, the kernel will
+     *    handle O_APPEND. However, unless all changes to the file
+     *    come through the kernel this will not work reliably. The
+     *    filesystem should thus either ignore the O_APPEND flag
+     *    (and let the kernel handle it), or return an error
+     *    (indicating that reliably O_APPEND is not available).
+     *
+     * Filesystem may store an arbitrary file handle (pointer,
+     * index, etc) in fi->fh, and use this in other all other file
+     * operations (read, write, flush, release, fsync).
+     *
+     * Filesystem may also implement stateless file I/O and not store
+     * anything in fi->fh.
+     *
+     * There are also some flags (direct_io, keep_cache) which the
+     * filesystem may set in fi, to change the way the file is opened.
+     * See fuse_file_info structure in <fuse_common.h> for more details.
+     *
+     * If this request is answered with an error code of ENOSYS
+     * and FUSE_CAP_NO_OPEN_SUPPORT is set in
+     * `fuse_conn_info.capable`, this is treated as success and
+     * future calls to open and release will also succeed without being
+     * sent to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_open
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     */
+    void (*open)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi);
+
+    /**
+     * Read data
+     *
+     * Read should send exactly the number of bytes requested except
+     * on EOF or error, otherwise the rest of the data will be
+     * substituted with zeroes.  An exception to this is when the file
+     * has been opened in 'direct_io' mode, in which case the return
+     * value of the read system call will reflect the return value of
+     * this operation.
+     *
+     * fi->fh will contain the value set by the open method, or will
+     * be undefined if the open method didn't set any value.
+     *
+     * Valid replies:
+     *   fuse_reply_buf
+     *   fuse_reply_iov
+     *   fuse_reply_data
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param size number of bytes to read
+     * @param off offset to read from
+     * @param fi file information
+     */
+    void (*read)(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
+                 struct fuse_file_info *fi);
+
+    /**
+     * Write data
+     *
+     * Write should return exactly the number of bytes requested
+     * except on error.  An exception to this is when the file has
+     * been opened in 'direct_io' mode, in which case the return value
+     * of the write system call will reflect the return value of this
+     * operation.
+     *
+     * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
+     * expected to reset the setuid and setgid bits.
+     *
+     * fi->fh will contain the value set by the open method, or will
+     * be undefined if the open method didn't set any value.
+     *
+     * Valid replies:
+     *   fuse_reply_write
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param buf data to write
+     * @param size number of bytes to write
+     * @param off offset to write to
+     * @param fi file information
+     */
+    void (*write)(fuse_req_t req, fuse_ino_t ino, const char *buf, size_t size,
+                  off_t off, struct fuse_file_info *fi);
+
+    /**
+     * Flush method
+     *
+     * This is called on each close() of the opened file.
+     *
+     * Since file descriptors can be duplicated (dup, dup2, fork), for
+     * one open call there may be many flush calls.
+     *
+     * Filesystems shouldn't assume that flush will always be called
+     * after some writes, or that if will be called at all.
+     *
+     * fi->fh will contain the value set by the open method, or will
+     * be undefined if the open method didn't set any value.
+     *
+     * NOTE: the name of the method is misleading, since (unlike
+     * fsync) the filesystem is not forced to flush pending writes.
+     * One reason to flush data is if the filesystem wants to return
+     * write errors during close.  However, such use is non-portable
+     * because POSIX does not require [close] to wait for delayed I/O to
+     * complete.
+     *
+     * If the filesystem supports file locking operations (setlk,
+     * getlk) it should remove all locks belonging to 'fi->owner'.
+     *
+     * If this request is answered with an error code of ENOSYS,
+     * this is treated as success and future calls to flush() will
+     * succeed automatically without being send to the filesystem
+     * process.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     *
+     * [close]:
+     * http://pubs.opengroup.org/onlinepubs/9699919799/functions/close.html
+     */
+    void (*flush)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi);
+
+    /**
+     * Release an open file
+     *
+     * Release is called when there are no more references to an open
+     * file: all file descriptors are closed and all memory mappings
+     * are unmapped.
+     *
+     * For every open call there will be exactly one release call (unless
+     * the filesystem is force-unmounted).
+     *
+     * The filesystem may reply with an error, but error values are
+     * not returned to close() or munmap() which triggered the
+     * release.
+     *
+     * fi->fh will contain the value set by the open method, or will
+     * be undefined if the open method didn't set any value.
+     * fi->flags will contain the same flags as for open.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     */
+    void (*release)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi);
+
+    /**
+     * Synchronize file contents
+     *
+     * If the datasync parameter is non-zero, then only the user data
+     * should be flushed, not the meta data.
+     *
+     * If this request is answered with an error code of ENOSYS,
+     * this is treated as success and future calls to fsync() will
+     * succeed automatically without being send to the filesystem
+     * process.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param datasync flag indicating if only data should be flushed
+     * @param fi file information
+     */
+    void (*fsync)(fuse_req_t req, fuse_ino_t ino, int datasync,
+                  struct fuse_file_info *fi);
+
+    /**
+     * Open a directory
+     *
+     * Filesystem may store an arbitrary file handle (pointer, index,
+     * etc) in fi->fh, and use this in other all other directory
+     * stream operations (readdir, releasedir, fsyncdir).
+     *
+     * If this request is answered with an error code of ENOSYS and
+     * FUSE_CAP_NO_OPENDIR_SUPPORT is set in `fuse_conn_info.capable`,
+     * this is treated as success and future calls to opendir and
+     * releasedir will also succeed without being sent to the filesystem
+     * process. In addition, the kernel will cache readdir results
+     * as if opendir returned FOPEN_KEEP_CACHE | FOPEN_CACHE_DIR.
+     *
+     * Valid replies:
+     *   fuse_reply_open
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     */
+    void (*opendir)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi);
+
+    /**
+     * Read directory
+     *
+     * Send a buffer filled using fuse_add_direntry(), with size not
+     * exceeding the requested size.  Send an empty buffer on end of
+     * stream.
+     *
+     * fi->fh will contain the value set by the opendir method, or
+     * will be undefined if the opendir method didn't set any value.
+     *
+     * Returning a directory entry from readdir() does not affect
+     * its lookup count.
+     *
+     * If off_t is non-zero, then it will correspond to one of the off_t
+     * values that was previously returned by readdir() for the same
+     * directory handle. In this case, readdir() should skip over entries
+     * coming before the position defined by the off_t value. If entries
+     * are added or removed while the directory handle is open, they filesystem
+     * may still include the entries that have been removed, and may not
+     * report the entries that have been created. However, addition or
+     * removal of entries must never cause readdir() to skip over unrelated
+     * entries or to report them more than once. This means
+     * that off_t can not be a simple index that enumerates the entries
+     * that have been returned but must contain sufficient information to
+     * uniquely determine the next directory entry to return even when the
+     * set of entries is changing.
+     *
+     * The function does not have to report the '.' and '..'
+     * entries, but is allowed to do so. Note that, if readdir does
+     * not return '.' or '..', they will not be implicitly returned,
+     * and this behavior is observable by the caller.
+     *
+     * Valid replies:
+     *   fuse_reply_buf
+     *   fuse_reply_data
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param size maximum number of bytes to send
+     * @param off offset to continue reading the directory stream
+     * @param fi file information
+     */
+    void (*readdir)(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
+                    struct fuse_file_info *fi);
+
+    /**
+     * Release an open directory
+     *
+     * For every opendir call there will be exactly one releasedir
+     * call (unless the filesystem is force-unmounted).
+     *
+     * fi->fh will contain the value set by the opendir method, or
+     * will be undefined if the opendir method didn't set any value.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     */
+    void (*releasedir)(fuse_req_t req, fuse_ino_t ino,
+                       struct fuse_file_info *fi);
+
+    /**
+     * Synchronize directory contents
+     *
+     * If the datasync parameter is non-zero, then only the directory
+     * contents should be flushed, not the meta data.
+     *
+     * fi->fh will contain the value set by the opendir method, or
+     * will be undefined if the opendir method didn't set any value.
+     *
+     * If this request is answered with an error code of ENOSYS,
+     * this is treated as success and future calls to fsyncdir() will
+     * succeed automatically without being send to the filesystem
+     * process.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param datasync flag indicating if only data should be flushed
+     * @param fi file information
+     */
+    void (*fsyncdir)(fuse_req_t req, fuse_ino_t ino, int datasync,
+                     struct fuse_file_info *fi);
+
+    /**
+     * Get file system statistics
+     *
+     * Valid replies:
+     *   fuse_reply_statfs
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number, zero means "undefined"
+     */
+    void (*statfs)(fuse_req_t req, fuse_ino_t ino);
+
+    /**
+     * Set an extended attribute
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
+     * future setxattr() requests will fail with EOPNOTSUPP without being
+     * send to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     */
+    void (*setxattr)(fuse_req_t req, fuse_ino_t ino, const char *name,
+                     const char *value, size_t size, int flags);
+
+    /**
+     * Get an extended attribute
+     *
+     * If size is zero, the size of the value should be sent with
+     * fuse_reply_xattr.
+     *
+     * If the size is non-zero, and the value fits in the buffer, the
+     * value should be sent with fuse_reply_buf.
+     *
+     * If the size is too small for the value, the ERANGE error should
+     * be sent.
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
+     * future getxattr() requests will fail with EOPNOTSUPP without being
+     * send to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_buf
+     *   fuse_reply_data
+     *   fuse_reply_xattr
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param name of the extended attribute
+     * @param size maximum size of the value to send
+     */
+    void (*getxattr)(fuse_req_t req, fuse_ino_t ino, const char *name,
+                     size_t size);
+
+    /**
+     * List extended attribute names
+     *
+     * If size is zero, the total size of the attribute list should be
+     * sent with fuse_reply_xattr.
+     *
+     * If the size is non-zero, and the null character separated
+     * attribute list fits in the buffer, the list should be sent with
+     * fuse_reply_buf.
+     *
+     * If the size is too small for the list, the ERANGE error should
+     * be sent.
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
+     * future listxattr() requests will fail with EOPNOTSUPP without being
+     * send to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_buf
+     *   fuse_reply_data
+     *   fuse_reply_xattr
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param size maximum size of the list to send
+     */
+    void (*listxattr)(fuse_req_t req, fuse_ino_t ino, size_t size);
+
+    /**
+     * Remove an extended attribute
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
+     * future removexattr() requests will fail with EOPNOTSUPP without being
+     * send to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param name of the extended attribute
+     */
+    void (*removexattr)(fuse_req_t req, fuse_ino_t ino, const char *name);
+
+    /**
+     * Check file access permissions
+     *
+     * This will be called for the access() and chdir() system
+     * calls.  If the 'default_permissions' mount option is given,
+     * this method is not called.
+     *
+     * This method is not called under Linux kernel versions 2.4.x
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent success, i.e. this and all future access()
+     * requests will succeed without being send to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param mask requested access mode
+     */
+    void (*access)(fuse_req_t req, fuse_ino_t ino, int mask);
+
+    /**
+     * Create and open a file
+     *
+     * If the file does not exist, first create it with the specified
+     * mode, and then open it.
+     *
+     * See the description of the open handler for more
+     * information.
+     *
+     * If this method is not implemented or under Linux kernel
+     * versions earlier than 2.6.15, the mknod() and open() methods
+     * will be called instead.
+     *
+     * If this request is answered with an error code of ENOSYS, the handler
+     * is treated as not implemented (i.e., for this and future requests the
+     * mknod() and open() handlers will be called instead).
+     *
+     * Valid replies:
+     *   fuse_reply_create
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param parent inode number of the parent directory
+     * @param name to create
+     * @param mode file type and mode with which to create the new file
+     * @param fi file information
+     */
+    void (*create)(fuse_req_t req, fuse_ino_t parent, const char *name,
+                   mode_t mode, struct fuse_file_info *fi);
+
+    /**
+     * Test for a POSIX file lock
+     *
+     * Valid replies:
+     *   fuse_reply_lock
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     * @param lock the region/type to test
+     */
+    void (*getlk)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi,
+                  struct flock *lock);
+
+    /**
+     * Acquire, modify or release a POSIX file lock
+     *
+     * For POSIX threads (NPTL) there's a 1-1 relation between pid and
+     * owner, but otherwise this is not always the case.  For checking
+     * lock ownership, 'fi->owner' must be used.  The l_pid field in
+     * 'struct flock' should only be used to fill in this field in
+     * getlk().
+     *
+     * Note: if the locking methods are not implemented, the kernel
+     * will still allow file locking to work locally.  Hence these are
+     * only interesting for network filesystems and similar.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     * @param lock the region/type to set
+     * @param sleep locking operation may sleep
+     */
+    void (*setlk)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi,
+                  struct flock *lock, int sleep);
+
+    /**
+     * Map block index within file to block index within device
+     *
+     * Note: This makes sense only for block device backed filesystems
+     * mounted with the 'blkdev' option
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure, i.e. all future bmap() requests will
+     * fail with the same error code without being send to the filesystem
+     * process.
+     *
+     * Valid replies:
+     *   fuse_reply_bmap
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param blocksize unit of block index
+     * @param idx block index within file
+     */
+    void (*bmap)(fuse_req_t req, fuse_ino_t ino, size_t blocksize,
+                 uint64_t idx);
+
+    /**
+     * Ioctl
+     *
+     * Note: For unrestricted ioctls (not allowed for FUSE
+     * servers), data in and out areas can be discovered by giving
+     * iovs and setting FUSE_IOCTL_RETRY in *flags*.  For
+     * restricted ioctls, kernel prepares in/out data area
+     * according to the information encoded in cmd.
+     *
+     * Valid replies:
+     *   fuse_reply_ioctl_retry
+     *   fuse_reply_ioctl
+     *   fuse_reply_ioctl_iov
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param cmd ioctl command
+     * @param arg ioctl argument
+     * @param fi file information
+     * @param flags for FUSE_IOCTL_* flags
+     * @param in_buf data fetched from the caller
+     * @param in_bufsz number of fetched bytes
+     * @param out_bufsz maximum size of output data
+     *
+     * Note : the unsigned long request submitted by the application
+     * is truncated to 32 bits.
+     */
+    void (*ioctl)(fuse_req_t req, fuse_ino_t ino, unsigned int cmd, void *arg,
+                  struct fuse_file_info *fi, unsigned flags, const void *in_buf,
+                  size_t in_bufsz, size_t out_bufsz);
+
+    /**
+     * Poll for IO readiness
+     *
+     * Note: If ph is non-NULL, the client should notify
+     * when IO readiness events occur by calling
+     * fuse_lowlevel_notify_poll() with the specified ph.
+     *
+     * Regardless of the number of times poll with a non-NULL ph
+     * is received, single notification is enough to clear all.
+     * Notifying more times incurs overhead but doesn't harm
+     * correctness.
+     *
+     * The callee is responsible for destroying ph with
+     * fuse_pollhandle_destroy() when no longer in use.
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as success (with a kernel-defined default poll-mask) and
+     * future calls to pull() will succeed the same way without being send
+     * to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_poll
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     * @param ph poll handle to be used for notification
+     */
+    void (*poll)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi,
+                 struct fuse_pollhandle *ph);
+
+    /**
+     * Write data made available in a buffer
+     *
+     * This is a more generic version of the ->write() method.  If
+     * FUSE_CAP_SPLICE_READ is set in fuse_conn_info.want and the
+     * kernel supports splicing from the fuse device, then the
+     * data will be made available in pipe for supporting zero
+     * copy data transfer.
+     *
+     * buf->count is guaranteed to be one (and thus buf->idx is
+     * always zero). The write_buf handler must ensure that
+     * bufv->off is correctly updated (reflecting the number of
+     * bytes read from bufv->buf[0]).
+     *
+     * Unless FUSE_CAP_HANDLE_KILLPRIV is disabled, this method is
+     * expected to reset the setuid and setgid bits.
+     *
+     * Valid replies:
+     *   fuse_reply_write
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param bufv buffer containing the data
+     * @param off offset to write to
+     * @param fi file information
+     */
+    void (*write_buf)(fuse_req_t req, fuse_ino_t ino, struct fuse_bufvec *bufv,
+                      off_t off, struct fuse_file_info *fi);
+
+    /**
+     * Callback function for the retrieve request
+     *
+     * Valid replies:
+     *  fuse_reply_none
+     *
+     * @param req request handle
+     * @param cookie user data supplied to fuse_lowlevel_notify_retrieve()
+     * @param ino the inode number supplied to fuse_lowlevel_notify_retrieve()
+     * @param offset the offset supplied to fuse_lowlevel_notify_retrieve()
+     * @param bufv the buffer containing the returned data
+     */
+    void (*retrieve_reply)(fuse_req_t req, void *cookie, fuse_ino_t ino,
+                           off_t offset, struct fuse_bufvec *bufv);
+
+    /**
+     * Forget about multiple inodes
+     *
+     * See description of the forget function for more
+     * information.
+     *
+     * Valid replies:
+     *   fuse_reply_none
+     *
+     * @param req request handle
+     */
+    void (*forget_multi)(fuse_req_t req, size_t count,
+                         struct fuse_forget_data *forgets);
+
+    /**
+     * Acquire, modify or release a BSD file lock
+     *
+     * Note: if the locking methods are not implemented, the kernel
+     * will still allow file locking to work locally.  Hence these are
+     * only interesting for network filesystems and similar.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param fi file information
+     * @param op the locking operation, see flock(2)
+     */
+    void (*flock)(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi,
+                  int op);
+
+    /**
+     * Allocate requested space. If this function returns success then
+     * subsequent writes to the specified range shall not fail due to the lack
+     * of free space on the file system storage media.
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
+     * future fallocate() requests will fail with EOPNOTSUPP without being
+     * send to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param offset starting point for allocated region
+     * @param length size of allocated region
+     * @param mode determines the operation to be performed on the given range,
+     *             see fallocate(2)
+     */
+    void (*fallocate)(fuse_req_t req, fuse_ino_t ino, int mode, off_t offset,
+                      off_t length, struct fuse_file_info *fi);
+
+    /**
+     * Read directory with attributes
+     *
+     * Send a buffer filled using fuse_add_direntry_plus(), with size not
+     * exceeding the requested size.  Send an empty buffer on end of
+     * stream.
+     *
+     * fi->fh will contain the value set by the opendir method, or
+     * will be undefined if the opendir method didn't set any value.
+     *
+     * In contrast to readdir() (which does not affect the lookup counts),
+     * the lookup count of every entry returned by readdirplus(), except "."
+     * and "..", is incremented by one.
+     *
+     * Valid replies:
+     *   fuse_reply_buf
+     *   fuse_reply_data
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param size maximum number of bytes to send
+     * @param off offset to continue reading the directory stream
+     * @param fi file information
+     */
+    void (*readdirplus)(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
+                        struct fuse_file_info *fi);
+
+    /**
+     * Copy a range of data from one file to another
+     *
+     * Performs an optimized copy between two file descriptors without the
+     * additional cost of transferring data through the FUSE kernel module
+     * to user space (glibc) and then back into the FUSE filesystem again.
+     *
+     * In case this method is not implemented, glibc falls back to reading
+     * data from the source and writing to the destination. Effectively
+     * doing an inefficient copy of the data.
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure with error code EOPNOTSUPP, i.e. all
+     * future copy_file_range() requests will fail with EOPNOTSUPP without
+     * being send to the filesystem process.
+     *
+     * Valid replies:
+     *   fuse_reply_write
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino_in the inode number or the source file
+     * @param off_in starting point from were the data should be read
+     * @param fi_in file information of the source file
+     * @param ino_out the inode number or the destination file
+     * @param off_out starting point where the data should be written
+     * @param fi_out file information of the destination file
+     * @param len maximum size of the data to copy
+     * @param flags passed along with the copy_file_range() syscall
+     */
+    void (*copy_file_range)(fuse_req_t req, fuse_ino_t ino_in, off_t off_in,
+                            struct fuse_file_info *fi_in, fuse_ino_t ino_out,
+                            off_t off_out, struct fuse_file_info *fi_out,
+                            size_t len, int flags);
+
+    /**
+     * Find next data or hole after the specified offset
+     *
+     * If this request is answered with an error code of ENOSYS, this is
+     * treated as a permanent failure, i.e. all future lseek() requests will
+     * fail with the same error code without being send to the filesystem
+     * process.
+     *
+     * Valid replies:
+     *   fuse_reply_lseek
+     *   fuse_reply_err
+     *
+     * @param req request handle
+     * @param ino the inode number
+     * @param off offset to start search from
+     * @param whence either SEEK_DATA or SEEK_HOLE
+     * @param fi file information
+     */
+    void (*lseek)(fuse_req_t req, fuse_ino_t ino, off_t off, int whence,
+                  struct fuse_file_info *fi);
 };
 
 /**
@@ -1305,7 +1307,7 @@ int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e);
  * @return zero for success, -errno for failure to send reply
  */
 int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
-		      const struct fuse_file_info *fi);
+                      const struct fuse_file_info *fi);
 
 /**
  * Reply with attributes
@@ -1315,11 +1317,11 @@ int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
  *
  * @param req request handle
  * @param attr the attributes
- * @param attr_timeout	validity timeout (in seconds) for the attributes
+ * @param attr_timeout validity timeout (in seconds) for the attributes
  * @return zero for success, -errno for failure to send reply
  */
 int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
-		    double attr_timeout);
+                    double attr_timeout);
 
 /**
  * Reply with the contents of a symbolic link
@@ -1417,7 +1419,7 @@ int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size);
  * @return zero for success, -errno for failure to send reply
  */
 int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv,
-		    enum fuse_buf_copy_flags flags);
+                    enum fuse_buf_copy_flags flags);
 
 /**
  * Reply with data vector
@@ -1480,9 +1482,9 @@ int fuse_reply_lock(fuse_req_t req, const struct flock *lock);
  */
 int fuse_reply_bmap(fuse_req_t req, uint64_t idx);
 
-/* ----------------------------------------------------------- *
- * Filling a buffer in readdir				       *
- * ----------------------------------------------------------- */
+/*
+ * Filling a buffer in readdir
+ */
 
 /**
  * Add a directory entry to the buffer
@@ -1512,8 +1514,7 @@ int fuse_reply_bmap(fuse_req_t req, uint64_t idx);
  * @return the space needed for the entry
  */
 size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize,
-			 const char *name, const struct stat *stbuf,
-			 off_t off);
+                         const char *name, const struct stat *stbuf, off_t off);
 
 /**
  * Add a directory entry to the buffer with the attributes
@@ -1529,8 +1530,8 @@ size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize,
  * @return the space needed for the entry
  */
 size_t fuse_add_direntry_plus(fuse_req_t req, char *buf, size_t bufsize,
-			      const char *name,
-			      const struct fuse_entry_param *e, off_t off);
+                              const char *name,
+                              const struct fuse_entry_param *e, off_t off);
 
 /**
  * Reply to ask for data fetch and output buffer preparation.  ioctl
@@ -1547,9 +1548,9 @@ size_t fuse_add_direntry_plus(fuse_req_t req, char *buf, size_t bufsize,
  * @param out_count number of entries in out_iov
  * @return zero for success, -errno for failure to send reply
  */
-int fuse_reply_ioctl_retry(fuse_req_t req,
-			   const struct iovec *in_iov, size_t in_count,
-			   const struct iovec *out_iov, size_t out_count);
+int fuse_reply_ioctl_retry(fuse_req_t req, const struct iovec *in_iov,
+                           size_t in_count, const struct iovec *out_iov,
+                           size_t out_count);
 
 /**
  * Reply to finish ioctl
@@ -1576,7 +1577,7 @@ int fuse_reply_ioctl(fuse_req_t req, int result, const void *buf, size_t size);
  * @param count the size of vector
  */
 int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov,
-			 int count);
+                         int count);
 
 /**
  * Reply with poll result event mask
@@ -1598,9 +1599,9 @@ int fuse_reply_poll(fuse_req_t req, unsigned revents);
  */
 int fuse_reply_lseek(fuse_req_t req, off_t off);
 
-/* ----------------------------------------------------------- *
- * Notification						       *
- * ----------------------------------------------------------- */
+/*
+ * Notification
+ */
 
 /**
  * Notify IO readiness event
@@ -1635,7 +1636,7 @@ int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph);
  * @return zero for success, -errno for failure
  */
 int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino,
-				     off_t off, off_t len);
+                                     off_t off, off_t len);
 
 /**
  * Notify to invalidate parent attributes and the dentry matching
@@ -1663,7 +1664,7 @@ int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino,
  * @return zero for success, -errno for failure
  */
 int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent,
-				     const char *name, size_t namelen);
+                                     const char *name, size_t namelen);
 
 /**
  * This function behaves like fuse_lowlevel_notify_inval_entry() with
@@ -1693,9 +1694,9 @@ int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent,
  * @param namelen strlen() of file name
  * @return zero for success, -errno for failure
  */
-int fuse_lowlevel_notify_delete(struct fuse_session *se,
-				fuse_ino_t parent, fuse_ino_t child,
-				const char *name, size_t namelen);
+int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent,
+                                fuse_ino_t child, const char *name,
+                                size_t namelen);
 
 /**
  * Store data to the kernel buffers
@@ -1723,8 +1724,8 @@ int fuse_lowlevel_notify_delete(struct fuse_session *se,
  * @return zero for success, -errno for failure
  */
 int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
-			       off_t offset, struct fuse_bufvec *bufv,
-			       enum fuse_buf_copy_flags flags);
+                               off_t offset, struct fuse_bufvec *bufv,
+                               enum fuse_buf_copy_flags flags);
 /**
  * Retrieve data from the kernel buffers
  *
@@ -1755,12 +1756,12 @@ int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
  * @return zero for success, -errno for failure
  */
 int fuse_lowlevel_notify_retrieve(struct fuse_session *se, fuse_ino_t ino,
-				  size_t size, off_t offset, void *cookie);
+                                  size_t size, off_t offset, void *cookie);
 
 
-/* ----------------------------------------------------------- *
- * Utility functions					       *
- * ----------------------------------------------------------- */
+/*
+ * Utility functions
+ */
 
 /**
  * Get the userdata from the request
@@ -1822,7 +1823,7 @@ typedef void (*fuse_interrupt_func_t)(fuse_req_t req, void *data);
  * @param data user data passed to the callback function
  */
 void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
-			     void *data);
+                             void *data);
 
 /**
  * Check if a request has already been interrupted
@@ -1833,9 +1834,9 @@ void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
 int fuse_req_interrupted(fuse_req_t req);
 
 
-/* ----------------------------------------------------------- *
- * Inquiry functions                                           *
- * ----------------------------------------------------------- */
+/*
+ * Inquiry functions
+ */
 
 /**
  * Print low-level version information to stdout.
@@ -1854,19 +1855,19 @@ void fuse_lowlevel_help(void);
  */
 void fuse_cmdline_help(void);
 
-/* ----------------------------------------------------------- *
- * Filesystem setup & teardown                                 *
- * ----------------------------------------------------------- */
+/*
+ * Filesystem setup & teardown
+ */
 
 struct fuse_cmdline_opts {
-	int singlethread;
-	int foreground;
-	int debug;
-	int nodefault_subtype;
-	char *mountpoint;
-	int show_version;
-	int show_help;
-	unsigned int max_idle_threads;
+    int singlethread;
+    int foreground;
+    int debug;
+    int nodefault_subtype;
+    char *mountpoint;
+    int show_version;
+    int show_help;
+    unsigned int max_idle_threads;
 };
 
 /**
@@ -1887,8 +1888,7 @@ struct fuse_cmdline_opts {
  * @param opts output argument for parsed options
  * @return 0 on success, -1 on failure
  */
-int fuse_parse_cmdline(struct fuse_args *args,
-		       struct fuse_cmdline_opts *opts);
+int fuse_parse_cmdline(struct fuse_args *args, struct fuse_cmdline_opts *opts);
 
 /**
  * Create a low level session.
@@ -1919,8 +1919,8 @@ int fuse_parse_cmdline(struct fuse_args *args,
  * @return the fuse session on success, NULL on failure
  **/
 struct fuse_session *fuse_session_new(struct fuse_args *args,
-				      const struct fuse_lowlevel_ops *op,
-				      size_t op_size, void *userdata);
+                                      const struct fuse_lowlevel_ops *op,
+                                      size_t op_size, void *userdata);
 
 /**
  * Mount a FUSE file system.
@@ -2015,9 +2015,9 @@ void fuse_session_unmount(struct fuse_session *se);
  */
 void fuse_session_destroy(struct fuse_session *se);
 
-/* ----------------------------------------------------------- *
- * Custom event loop support                                   *
- * ----------------------------------------------------------- */
+/*
+ * Custom event loop support
+ */
 
 /**
  * Return file descriptor for communication with kernel.
@@ -2044,7 +2044,7 @@ int fuse_session_fd(struct fuse_session *se);
  * @param buf the fuse_buf containing the request
  */
 void fuse_session_process_buf(struct fuse_session *se,
-			      const struct fuse_buf *buf);
+                              const struct fuse_buf *buf);
 
 /**
  * Read a raw request from the kernel into the supplied buffer.
diff --git a/tools/virtiofsd/fuse_misc.h b/tools/virtiofsd/fuse_misc.h
index 2f6663ed7d..f252baa752 100644
--- a/tools/virtiofsd/fuse_misc.h
+++ b/tools/virtiofsd/fuse_misc.h
@@ -1,18 +1,18 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB
+ */
 
 #include <pthread.h>
 
 /*
-  Versioned symbols cannot be used in some cases because it
-    - confuse the dynamic linker in uClibc
-    - not supported on MacOSX (in MachO binary format)
-*/
+ * Versioned symbols cannot be used in some cases because it
+ *   - confuse the dynamic linker in uClibc
+ *   - not supported on MacOSX (in MachO binary format)
+ */
 #if (!defined(__UCLIBC__) && !defined(__APPLE__))
 #define FUSE_SYMVER(x) __asm__(x)
 #else
@@ -25,11 +25,11 @@
 /* Is this hack still needed? */
 static inline void fuse_mutex_init(pthread_mutex_t *mut)
 {
-	pthread_mutexattr_t attr;
-	pthread_mutexattr_init(&attr);
-	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ADAPTIVE_NP);
-	pthread_mutex_init(mut, &attr);
-	pthread_mutexattr_destroy(&attr);
+    pthread_mutexattr_t attr;
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ADAPTIVE_NP);
+    pthread_mutex_init(mut, &attr);
+    pthread_mutexattr_destroy(&attr);
 }
 #endif
 
diff --git a/tools/virtiofsd/fuse_opt.c b/tools/virtiofsd/fuse_opt.c
index 93066b926e..edd36f4a3b 100644
--- a/tools/virtiofsd/fuse_opt.c
+++ b/tools/virtiofsd/fuse_opt.c
@@ -1,423 +1,450 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  Implementation of option parsing routines (dealing with `struct
-  fuse_args`).
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * Implementation of option parsing routines (dealing with `struct
+ * fuse_args`).
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB
+ */
 
+#include "fuse_opt.h"
 #include "config.h"
 #include "fuse_i.h"
-#include "fuse_opt.h"
 #include "fuse_misc.h"
 
+#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <assert.h>
 
 struct fuse_opt_context {
-	void *data;
-	const struct fuse_opt *opt;
-	fuse_opt_proc_t proc;
-	int argctr;
-	int argc;
-	char **argv;
-	struct fuse_args outargs;
-	char *opts;
-	int nonopt;
+    void *data;
+    const struct fuse_opt *opt;
+    fuse_opt_proc_t proc;
+    int argctr;
+    int argc;
+    char **argv;
+    struct fuse_args outargs;
+    char *opts;
+    int nonopt;
 };
 
 void fuse_opt_free_args(struct fuse_args *args)
 {
-	if (args) {
-		if (args->argv && args->allocated) {
-			int i;
-			for (i = 0; i < args->argc; i++)
-				free(args->argv[i]);
-			free(args->argv);
-		}
-		args->argc = 0;
-		args->argv = NULL;
-		args->allocated = 0;
-	}
+    if (args) {
+        if (args->argv && args->allocated) {
+            int i;
+            for (i = 0; i < args->argc; i++) {
+                free(args->argv[i]);
+            }
+            free(args->argv);
+        }
+        args->argc = 0;
+        args->argv = NULL;
+        args->allocated = 0;
+    }
 }
 
 static int alloc_failed(void)
 {
-	fuse_log(FUSE_LOG_ERR, "fuse: memory allocation failed\n");
-	return -1;
+    fuse_log(FUSE_LOG_ERR, "fuse: memory allocation failed\n");
+    return -1;
 }
 
 int fuse_opt_add_arg(struct fuse_args *args, const char *arg)
 {
-	char **newargv;
-	char *newarg;
-
-	assert(!args->argv || args->allocated);
-
-	newarg = strdup(arg);
-	if (!newarg)
-		return alloc_failed();
-
-	newargv = realloc(args->argv, (args->argc + 2) * sizeof(char *));
-	if (!newargv) {
-		free(newarg);
-		return alloc_failed();
-	}
-
-	args->argv = newargv;
-	args->allocated = 1;
-	args->argv[args->argc++] = newarg;
-	args->argv[args->argc] = NULL;
-	return 0;
+    char **newargv;
+    char *newarg;
+
+    assert(!args->argv || args->allocated);
+
+    newarg = strdup(arg);
+    if (!newarg) {
+        return alloc_failed();
+    }
+
+    newargv = realloc(args->argv, (args->argc + 2) * sizeof(char *));
+    if (!newargv) {
+        free(newarg);
+        return alloc_failed();
+    }
+
+    args->argv = newargv;
+    args->allocated = 1;
+    args->argv[args->argc++] = newarg;
+    args->argv[args->argc] = NULL;
+    return 0;
 }
 
 static int fuse_opt_insert_arg_common(struct fuse_args *args, int pos,
-				      const char *arg)
+                                      const char *arg)
 {
-	assert(pos <= args->argc);
-	if (fuse_opt_add_arg(args, arg) == -1)
-		return -1;
-
-	if (pos != args->argc - 1) {
-		char *newarg = args->argv[args->argc - 1];
-		memmove(&args->argv[pos + 1], &args->argv[pos],
-			sizeof(char *) * (args->argc - pos - 1));
-		args->argv[pos] = newarg;
-	}
-	return 0;
+    assert(pos <= args->argc);
+    if (fuse_opt_add_arg(args, arg) == -1) {
+        return -1;
+    }
+
+    if (pos != args->argc - 1) {
+        char *newarg = args->argv[args->argc - 1];
+        memmove(&args->argv[pos + 1], &args->argv[pos],
+                sizeof(char *) * (args->argc - pos - 1));
+        args->argv[pos] = newarg;
+    }
+    return 0;
 }
 
 int fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg)
 {
-	return fuse_opt_insert_arg_common(args, pos, arg);
+    return fuse_opt_insert_arg_common(args, pos, arg);
 }
 
 static int next_arg(struct fuse_opt_context *ctx, const char *opt)
 {
-	if (ctx->argctr + 1 >= ctx->argc) {
-		fuse_log(FUSE_LOG_ERR, "fuse: missing argument after `%s'\n", opt);
-		return -1;
-	}
-	ctx->argctr++;
-	return 0;
+    if (ctx->argctr + 1 >= ctx->argc) {
+        fuse_log(FUSE_LOG_ERR, "fuse: missing argument after `%s'\n", opt);
+        return -1;
+    }
+    ctx->argctr++;
+    return 0;
 }
 
 static int add_arg(struct fuse_opt_context *ctx, const char *arg)
 {
-	return fuse_opt_add_arg(&ctx->outargs, arg);
+    return fuse_opt_add_arg(&ctx->outargs, arg);
 }
 
 static int add_opt_common(char **opts, const char *opt, int esc)
 {
-	unsigned oldlen = *opts ? strlen(*opts) : 0;
-	char *d = realloc(*opts, oldlen + 1 + strlen(opt) * 2 + 1);
-
-	if (!d)
-		return alloc_failed();
-
-	*opts = d;
-	if (oldlen) {
-		d += oldlen;
-		*d++ = ',';
-	}
-
-	for (; *opt; opt++) {
-		if (esc && (*opt == ',' || *opt == '\\'))
-			*d++ = '\\';
-		*d++ = *opt;
-	}
-	*d = '\0';
-
-	return 0;
+    unsigned oldlen = *opts ? strlen(*opts) : 0;
+    char *d = realloc(*opts, oldlen + 1 + strlen(opt) * 2 + 1);
+
+    if (!d) {
+        return alloc_failed();
+    }
+
+    *opts = d;
+    if (oldlen) {
+        d += oldlen;
+        *d++ = ',';
+    }
+
+    for (; *opt; opt++) {
+        if (esc && (*opt == ',' || *opt == '\\')) {
+            *d++ = '\\';
+        }
+        *d++ = *opt;
+    }
+    *d = '\0';
+
+    return 0;
 }
 
 int fuse_opt_add_opt(char **opts, const char *opt)
 {
-	return add_opt_common(opts, opt, 0);
+    return add_opt_common(opts, opt, 0);
 }
 
 int fuse_opt_add_opt_escaped(char **opts, const char *opt)
 {
-	return add_opt_common(opts, opt, 1);
+    return add_opt_common(opts, opt, 1);
 }
 
 static int add_opt(struct fuse_opt_context *ctx, const char *opt)
 {
-	return add_opt_common(&ctx->opts, opt, 1);
+    return add_opt_common(&ctx->opts, opt, 1);
 }
 
 static int call_proc(struct fuse_opt_context *ctx, const char *arg, int key,
-		     int iso)
+                     int iso)
 {
-	if (key == FUSE_OPT_KEY_DISCARD)
-		return 0;
-
-	if (key != FUSE_OPT_KEY_KEEP && ctx->proc) {
-		int res = ctx->proc(ctx->data, arg, key, &ctx->outargs);
-		if (res == -1 || !res)
-			return res;
-	}
-	if (iso)
-		return add_opt(ctx, arg);
-	else
-		return add_arg(ctx, arg);
+    if (key == FUSE_OPT_KEY_DISCARD) {
+        return 0;
+    }
+
+    if (key != FUSE_OPT_KEY_KEEP && ctx->proc) {
+        int res = ctx->proc(ctx->data, arg, key, &ctx->outargs);
+        if (res == -1 || !res) {
+            return res;
+        }
+    }
+    if (iso) {
+        return add_opt(ctx, arg);
+    } else {
+        return add_arg(ctx, arg);
+    }
 }
 
 static int match_template(const char *t, const char *arg, unsigned *sepp)
 {
-	int arglen = strlen(arg);
-	const char *sep = strchr(t, '=');
-	sep = sep ? sep : strchr(t, ' ');
-	if (sep && (!sep[1] || sep[1] == '%')) {
-		int tlen = sep - t;
-		if (sep[0] == '=')
-			tlen ++;
-		if (arglen >= tlen && strncmp(arg, t, tlen) == 0) {
-			*sepp = sep - t;
-			return 1;
-		}
-	}
-	if (strcmp(t, arg) == 0) {
-		*sepp = 0;
-		return 1;
-	}
-	return 0;
+    int arglen = strlen(arg);
+    const char *sep = strchr(t, '=');
+    sep = sep ? sep : strchr(t, ' ');
+    if (sep && (!sep[1] || sep[1] == '%')) {
+        int tlen = sep - t;
+        if (sep[0] == '=') {
+            tlen++;
+        }
+        if (arglen >= tlen && strncmp(arg, t, tlen) == 0) {
+            *sepp = sep - t;
+            return 1;
+        }
+    }
+    if (strcmp(t, arg) == 0) {
+        *sepp = 0;
+        return 1;
+    }
+    return 0;
 }
 
 static const struct fuse_opt *find_opt(const struct fuse_opt *opt,
-				       const char *arg, unsigned *sepp)
+                                       const char *arg, unsigned *sepp)
 {
-	for (; opt && opt->templ; opt++)
-		if (match_template(opt->templ, arg, sepp))
-			return opt;
-	return NULL;
+    for (; opt && opt->templ; opt++) {
+        if (match_template(opt->templ, arg, sepp)) {
+            return opt;
+        }
+    }
+    return NULL;
 }
 
 int fuse_opt_match(const struct fuse_opt *opts, const char *opt)
 {
-	unsigned dummy;
-	return find_opt(opts, opt, &dummy) ? 1 : 0;
+    unsigned dummy;
+    return find_opt(opts, opt, &dummy) ? 1 : 0;
 }
 
 static int process_opt_param(void *var, const char *format, const char *param,
-			     const char *arg)
+                             const char *arg)
 {
-	assert(format[0] == '%');
-	if (format[1] == 's') {
-		char **s = var;
-		char *copy = strdup(param);
-		if (!copy)
-			return alloc_failed();
-
-		free(*s);
-		*s = copy;
-	} else {
-		if (sscanf(param, format, var) != 1) {
-			fuse_log(FUSE_LOG_ERR, "fuse: invalid parameter in option `%s'\n", arg);
-			return -1;
-		}
-	}
-	return 0;
+    assert(format[0] == '%');
+    if (format[1] == 's') {
+        char **s = var;
+        char *copy = strdup(param);
+        if (!copy) {
+            return alloc_failed();
+        }
+
+        free(*s);
+        *s = copy;
+    } else {
+        if (sscanf(param, format, var) != 1) {
+            fuse_log(FUSE_LOG_ERR, "fuse: invalid parameter in option `%s'\n",
+                     arg);
+            return -1;
+        }
+    }
+    return 0;
 }
 
-static int process_opt(struct fuse_opt_context *ctx,
-		       const struct fuse_opt *opt, unsigned sep,
-		       const char *arg, int iso)
+static int process_opt(struct fuse_opt_context *ctx, const struct fuse_opt *opt,
+                       unsigned sep, const char *arg, int iso)
 {
-	if (opt->offset == -1U) {
-		if (call_proc(ctx, arg, opt->value, iso) == -1)
-			return -1;
-	} else {
-		void *var = (char *)ctx->data + opt->offset;
-		if (sep && opt->templ[sep + 1]) {
-			const char *param = arg + sep;
-			if (opt->templ[sep] == '=')
-				param ++;
-			if (process_opt_param(var, opt->templ + sep + 1,
-					      param, arg) == -1)
-				return -1;
-		} else
-			*(int *)var = opt->value;
-	}
-	return 0;
+    if (opt->offset == -1U) {
+        if (call_proc(ctx, arg, opt->value, iso) == -1) {
+            return -1;
+        }
+    } else {
+        void *var = (char *)ctx->data + opt->offset;
+        if (sep && opt->templ[sep + 1]) {
+            const char *param = arg + sep;
+            if (opt->templ[sep] == '=') {
+                param++;
+            }
+            if (process_opt_param(var, opt->templ + sep + 1, param, arg) ==
+                -1) {
+                return -1;
+            }
+        } else {
+            *(int *)var = opt->value;
+        }
+    }
+    return 0;
 }
 
 static int process_opt_sep_arg(struct fuse_opt_context *ctx,
-			       const struct fuse_opt *opt, unsigned sep,
-			       const char *arg, int iso)
+                               const struct fuse_opt *opt, unsigned sep,
+                               const char *arg, int iso)
 {
-	int res;
-	char *newarg;
-	char *param;
-
-	if (next_arg(ctx, arg) == -1)
-		return -1;
-
-	param = ctx->argv[ctx->argctr];
-	newarg = malloc(sep + strlen(param) + 1);
-	if (!newarg)
-		return alloc_failed();
-
-	memcpy(newarg, arg, sep);
-	strcpy(newarg + sep, param);
-	res = process_opt(ctx, opt, sep, newarg, iso);
-	free(newarg);
-
-	return res;
+    int res;
+    char *newarg;
+    char *param;
+
+    if (next_arg(ctx, arg) == -1) {
+        return -1;
+    }
+
+    param = ctx->argv[ctx->argctr];
+    newarg = malloc(sep + strlen(param) + 1);
+    if (!newarg) {
+        return alloc_failed();
+    }
+
+    memcpy(newarg, arg, sep);
+    strcpy(newarg + sep, param);
+    res = process_opt(ctx, opt, sep, newarg, iso);
+    free(newarg);
+
+    return res;
 }
 
 static int process_gopt(struct fuse_opt_context *ctx, const char *arg, int iso)
 {
-	unsigned sep;
-	const struct fuse_opt *opt = find_opt(ctx->opt, arg, &sep);
-	if (opt) {
-		for (; opt; opt = find_opt(opt + 1, arg, &sep)) {
-			int res;
-			if (sep && opt->templ[sep] == ' ' && !arg[sep])
-				res = process_opt_sep_arg(ctx, opt, sep, arg,
-							  iso);
-			else
-				res = process_opt(ctx, opt, sep, arg, iso);
-			if (res == -1)
-				return -1;
-		}
-		return 0;
-	} else
-		return call_proc(ctx, arg, FUSE_OPT_KEY_OPT, iso);
+    unsigned sep;
+    const struct fuse_opt *opt = find_opt(ctx->opt, arg, &sep);
+    if (opt) {
+        for (; opt; opt = find_opt(opt + 1, arg, &sep)) {
+            int res;
+            if (sep && opt->templ[sep] == ' ' && !arg[sep]) {
+                res = process_opt_sep_arg(ctx, opt, sep, arg, iso);
+            } else {
+                res = process_opt(ctx, opt, sep, arg, iso);
+            }
+            if (res == -1) {
+                return -1;
+            }
+        }
+        return 0;
+    } else {
+        return call_proc(ctx, arg, FUSE_OPT_KEY_OPT, iso);
+    }
 }
 
 static int process_real_option_group(struct fuse_opt_context *ctx, char *opts)
 {
-	char *s = opts;
-	char *d = s;
-	int end = 0;
-
-	while (!end) {
-		if (*s == '\0')
-			end = 1;
-		if (*s == ',' || end) {
-			int res;
-
-			*d = '\0';
-			res = process_gopt(ctx, opts, 1);
-			if (res == -1)
-				return -1;
-			d = opts;
-		} else {
-			if (s[0] == '\\' && s[1] != '\0') {
-				s++;
-				if (s[0] >= '0' && s[0] <= '3' &&
-				    s[1] >= '0' && s[1] <= '7' &&
-				    s[2] >= '0' && s[2] <= '7') {
-					*d++ = (s[0] - '0') * 0100 +
-						(s[1] - '0') * 0010 +
-						(s[2] - '0');
-					s += 2;
-				} else {
-					*d++ = *s;
-				}
-			} else {
-				*d++ = *s;
-			}
-		}
-		s++;
-	}
-
-	return 0;
+    char *s = opts;
+    char *d = s;
+    int end = 0;
+
+    while (!end) {
+        if (*s == '\0') {
+            end = 1;
+        }
+        if (*s == ',' || end) {
+            int res;
+
+            *d = '\0';
+            res = process_gopt(ctx, opts, 1);
+            if (res == -1) {
+                return -1;
+            }
+            d = opts;
+        } else {
+            if (s[0] == '\\' && s[1] != '\0') {
+                s++;
+                if (s[0] >= '0' && s[0] <= '3' && s[1] >= '0' && s[1] <= '7' &&
+                    s[2] >= '0' && s[2] <= '7') {
+                    *d++ = (s[0] - '0') * 0100 + (s[1] - '0') * 0010 +
+                           (s[2] - '0');
+                    s += 2;
+                } else {
+                    *d++ = *s;
+                }
+            } else {
+                *d++ = *s;
+            }
+        }
+        s++;
+    }
+
+    return 0;
 }
 
 static int process_option_group(struct fuse_opt_context *ctx, const char *opts)
 {
-	int res;
-	char *copy = strdup(opts);
-
-	if (!copy) {
-		fuse_log(FUSE_LOG_ERR, "fuse: memory allocation failed\n");
-		return -1;
-	}
-	res = process_real_option_group(ctx, copy);
-	free(copy);
-	return res;
+    int res;
+    char *copy = strdup(opts);
+
+    if (!copy) {
+        fuse_log(FUSE_LOG_ERR, "fuse: memory allocation failed\n");
+        return -1;
+    }
+    res = process_real_option_group(ctx, copy);
+    free(copy);
+    return res;
 }
 
 static int process_one(struct fuse_opt_context *ctx, const char *arg)
 {
-	if (ctx->nonopt || arg[0] != '-')
-		return call_proc(ctx, arg, FUSE_OPT_KEY_NONOPT, 0);
-	else if (arg[1] == 'o') {
-		if (arg[2])
-			return process_option_group(ctx, arg + 2);
-		else {
-			if (next_arg(ctx, arg) == -1)
-				return -1;
-
-			return process_option_group(ctx,
-						    ctx->argv[ctx->argctr]);
-		}
-	} else if (arg[1] == '-' && !arg[2]) {
-		if (add_arg(ctx, arg) == -1)
-			return -1;
-		ctx->nonopt = ctx->outargs.argc;
-		return 0;
-	} else
-		return process_gopt(ctx, arg, 0);
+    if (ctx->nonopt || arg[0] != '-') {
+        return call_proc(ctx, arg, FUSE_OPT_KEY_NONOPT, 0);
+    } else if (arg[1] == 'o') {
+        if (arg[2]) {
+            return process_option_group(ctx, arg + 2);
+        } else {
+            if (next_arg(ctx, arg) == -1) {
+                return -1;
+            }
+
+            return process_option_group(ctx, ctx->argv[ctx->argctr]);
+        }
+    } else if (arg[1] == '-' && !arg[2]) {
+        if (add_arg(ctx, arg) == -1) {
+            return -1;
+        }
+        ctx->nonopt = ctx->outargs.argc;
+        return 0;
+    } else {
+        return process_gopt(ctx, arg, 0);
+    }
 }
 
 static int opt_parse(struct fuse_opt_context *ctx)
 {
-	if (ctx->argc) {
-		if (add_arg(ctx, ctx->argv[0]) == -1)
-			return -1;
-	}
-
-	for (ctx->argctr = 1; ctx->argctr < ctx->argc; ctx->argctr++)
-		if (process_one(ctx, ctx->argv[ctx->argctr]) == -1)
-			return -1;
-
-	if (ctx->opts) {
-		if (fuse_opt_insert_arg(&ctx->outargs, 1, "-o") == -1 ||
-		    fuse_opt_insert_arg(&ctx->outargs, 2, ctx->opts) == -1)
-			return -1;
-	}
-
-	/* If option separator ("--") is the last argument, remove it */
-	if (ctx->nonopt && ctx->nonopt == ctx->outargs.argc &&
-	    strcmp(ctx->outargs.argv[ctx->outargs.argc - 1], "--") == 0) {
-		free(ctx->outargs.argv[ctx->outargs.argc - 1]);
-		ctx->outargs.argv[--ctx->outargs.argc] = NULL;
-	}
-
-	return 0;
+    if (ctx->argc) {
+        if (add_arg(ctx, ctx->argv[0]) == -1) {
+            return -1;
+        }
+    }
+
+    for (ctx->argctr = 1; ctx->argctr < ctx->argc; ctx->argctr++) {
+        if (process_one(ctx, ctx->argv[ctx->argctr]) == -1) {
+            return -1;
+        }
+    }
+
+    if (ctx->opts) {
+        if (fuse_opt_insert_arg(&ctx->outargs, 1, "-o") == -1 ||
+            fuse_opt_insert_arg(&ctx->outargs, 2, ctx->opts) == -1) {
+            return -1;
+        }
+    }
+
+    /* If option separator ("--") is the last argument, remove it */
+    if (ctx->nonopt && ctx->nonopt == ctx->outargs.argc &&
+        strcmp(ctx->outargs.argv[ctx->outargs.argc - 1], "--") == 0) {
+        free(ctx->outargs.argv[ctx->outargs.argc - 1]);
+        ctx->outargs.argv[--ctx->outargs.argc] = NULL;
+    }
+
+    return 0;
 }
 
 int fuse_opt_parse(struct fuse_args *args, void *data,
-		   const struct fuse_opt opts[], fuse_opt_proc_t proc)
+                   const struct fuse_opt opts[], fuse_opt_proc_t proc)
 {
-	int res;
-	struct fuse_opt_context ctx = {
-		.data = data,
-		.opt = opts,
-		.proc = proc,
-	};
-
-	if (!args || !args->argv || !args->argc)
-		return 0;
-
-	ctx.argc = args->argc;
-	ctx.argv = args->argv;
-
-	res = opt_parse(&ctx);
-	if (res != -1) {
-		struct fuse_args tmp = *args;
-		*args = ctx.outargs;
-		ctx.outargs = tmp;
-	}
-	free(ctx.opts);
-	fuse_opt_free_args(&ctx.outargs);
-	return res;
+    int res;
+    struct fuse_opt_context ctx = {
+        .data = data,
+        .opt = opts,
+        .proc = proc,
+    };
+
+    if (!args || !args->argv || !args->argc) {
+        return 0;
+    }
+
+    ctx.argc = args->argc;
+    ctx.argv = args->argv;
+
+    res = opt_parse(&ctx);
+    if (res != -1) {
+        struct fuse_args tmp = *args;
+        *args = ctx.outargs;
+        ctx.outargs = tmp;
+    }
+    free(ctx.opts);
+    fuse_opt_free_args(&ctx.outargs);
+    return res;
 }
diff --git a/tools/virtiofsd/fuse_opt.h b/tools/virtiofsd/fuse_opt.h
index 69102555be..8f59b4d301 100644
--- a/tools/virtiofsd/fuse_opt.h
+++ b/tools/virtiofsd/fuse_opt.h
@@ -1,10 +1,10 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB.
+ */
 
 #ifndef FUSE_OPT_H_
 #define FUSE_OPT_H_
@@ -37,7 +37,7 @@
  *
  *  - 'offsetof(struct foo, member)'  actions i) and iii)
  *
- *  - -1			      action ii)
+ *  - -1                              action ii)
  *
  * The 'offsetof()' macro is defined in the <stddef.h> header.
  *
@@ -48,7 +48,7 @@
  *
  * The types of templates are:
  *
- * 1) "-x", "-foo", "--foo", "--foo-bar", etc.	These match only
+ * 1) "-x", "-foo", "--foo", "--foo-bar", etc. These match only
  *   themselves.  Invalid values are "--" and anything beginning
  *   with "-o"
  *
@@ -71,58 +71,67 @@
  * freed.
  */
 struct fuse_opt {
-	/** Matching template and optional parameter formatting */
-	const char *templ;
+    /** Matching template and optional parameter formatting */
+    const char *templ;
 
-	/**
-	 * Offset of variable within 'data' parameter of fuse_opt_parse()
-	 * or -1
-	 */
-	unsigned long offset;
+    /**
+     * Offset of variable within 'data' parameter of fuse_opt_parse()
+     * or -1
+     */
+    unsigned long offset;
 
-	/**
-	 * Value to set the variable to, or to be passed as 'key' to the
-	 * processing function.	 Ignored if template has a format
-	 */
-	int value;
+    /**
+     * Value to set the variable to, or to be passed as 'key' to the
+     * processing function. Ignored if template has a format
+     */
+    int value;
 };
 
 /**
- * Key option.	In case of a match, the processing function will be
+ * Key option. In case of a match, the processing function will be
  * called with the specified key.
  */
-#define FUSE_OPT_KEY(templ, key) { templ, -1U, key }
+#define FUSE_OPT_KEY(templ, key) \
+    {                            \
+        templ, -1U, key          \
+    }
 
 /**
- * Last option.	 An array of 'struct fuse_opt' must end with a NULL
+ * Last option. An array of 'struct fuse_opt' must end with a NULL
  * template value
  */
-#define FUSE_OPT_END { NULL, 0, 0 }
+#define FUSE_OPT_END \
+    {                \
+        NULL, 0, 0   \
+    }
 
 /**
  * Argument list
  */
 struct fuse_args {
-	/** Argument count */
-	int argc;
+    /** Argument count */
+    int argc;
 
-	/** Argument vector.  NULL terminated */
-	char **argv;
+    /** Argument vector.  NULL terminated */
+    char **argv;
 
-	/** Is 'argv' allocated? */
-	int allocated;
+    /** Is 'argv' allocated? */
+    int allocated;
 };
 
 /**
  * Initializer for 'struct fuse_args'
  */
-#define FUSE_ARGS_INIT(argc, argv) { argc, argv, 0 }
+#define FUSE_ARGS_INIT(argc, argv) \
+    {                              \
+        argc, argv, 0              \
+    }
 
 /**
  * Key value passed to the processing function if an option did not
  * match any template
  */
-#define FUSE_OPT_KEY_OPT     -1
+#define FUSE_OPT_KEY_OPT -1
 
 /**
  * Key value passed to the processing function for all non-options
@@ -130,7 +139,7 @@ struct fuse_args {
  * Non-options are the arguments beginning with a character other than
  * '-' or all arguments after the special '--' option
  */
-#define FUSE_OPT_KEY_NONOPT  -2
+#define FUSE_OPT_KEY_NONOPT -2
 
 /**
  * Special key value for options to keep
@@ -174,7 +183,7 @@ struct fuse_args {
  * @return -1 on error, 0 if arg is to be discarded, 1 if arg should be kept
  */
 typedef int (*fuse_opt_proc_t)(void *data, const char *arg, int key,
-			       struct fuse_args *outargs);
+                               struct fuse_args *outargs);
 
 /**
  * Option parsing function
@@ -197,7 +206,7 @@ typedef int (*fuse_opt_proc_t)(void *data, const char *arg, int key,
  * @return -1 on error, 0 on success
  */
 int fuse_opt_parse(struct fuse_args *args, void *data,
-		   const struct fuse_opt opts[], fuse_opt_proc_t proc);
+                   const struct fuse_opt opts[], fuse_opt_proc_t proc);
 
 /**
  * Add an option to a comma separated option list
diff --git a/tools/virtiofsd/fuse_signals.c b/tools/virtiofsd/fuse_signals.c
index 4271947bd4..19d6791cb9 100644
--- a/tools/virtiofsd/fuse_signals.c
+++ b/tools/virtiofsd/fuse_signals.c
@@ -1,91 +1,95 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  Utility functions for setting signal handlers.
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * Utility functions for setting signal handlers.
+ *
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB
+ */
 
 #include "config.h"
-#include "fuse_lowlevel.h"
 #include "fuse_i.h"
+#include "fuse_lowlevel.h"
 
-#include <stdio.h>
-#include <string.h>
 #include <signal.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 static struct fuse_session *fuse_instance;
 
 static void exit_handler(int sig)
 {
-	if (fuse_instance) {
-		fuse_session_exit(fuse_instance);
-		if(sig <= 0) {
-			fuse_log(FUSE_LOG_ERR, "assertion error: signal value <= 0\n");
-			abort();
-		}
-		fuse_instance->error = sig;
-	}
+    if (fuse_instance) {
+        fuse_session_exit(fuse_instance);
+        if (sig <= 0) {
+            fuse_log(FUSE_LOG_ERR, "assertion error: signal value <= 0\n");
+            abort();
+        }
+        fuse_instance->error = sig;
+    }
 }
 
 static void do_nothing(int sig)
 {
-	(void) sig;
+    (void)sig;
 }
 
 static int set_one_signal_handler(int sig, void (*handler)(int), int remove)
 {
-	struct sigaction sa;
-	struct sigaction old_sa;
+    struct sigaction sa;
+    struct sigaction old_sa;
 
-	memset(&sa, 0, sizeof(struct sigaction));
-	sa.sa_handler = remove ? SIG_DFL : handler;
-	sigemptyset(&(sa.sa_mask));
-	sa.sa_flags = 0;
+    memset(&sa, 0, sizeof(struct sigaction));
+    sa.sa_handler = remove ? SIG_DFL : handler;
+    sigemptyset(&(sa.sa_mask));
+    sa.sa_flags = 0;
 
-	if (sigaction(sig, NULL, &old_sa) == -1) {
-		perror("fuse: cannot get old signal handler");
-		return -1;
-	}
+    if (sigaction(sig, NULL, &old_sa) == -1) {
+        perror("fuse: cannot get old signal handler");
+        return -1;
+    }
 
-	if (old_sa.sa_handler == (remove ? handler : SIG_DFL) &&
-	    sigaction(sig, &sa, NULL) == -1) {
-		perror("fuse: cannot set signal handler");
-		return -1;
-	}
-	return 0;
+    if (old_sa.sa_handler == (remove ? handler : SIG_DFL) &&
+        sigaction(sig, &sa, NULL) == -1) {
+        perror("fuse: cannot set signal handler");
+        return -1;
+    }
+    return 0;
 }
 
 int fuse_set_signal_handlers(struct fuse_session *se)
 {
-	/* If we used SIG_IGN instead of the do_nothing function,
-	   then we would be unable to tell if we set SIG_IGN (and
-	   thus should reset to SIG_DFL in fuse_remove_signal_handlers)
-	   or if it was already set to SIG_IGN (and should be left
-	   untouched. */
-	if (set_one_signal_handler(SIGHUP, exit_handler, 0) == -1 ||
-	    set_one_signal_handler(SIGINT, exit_handler, 0) == -1 ||
-	    set_one_signal_handler(SIGTERM, exit_handler, 0) == -1 ||
-	    set_one_signal_handler(SIGPIPE, do_nothing, 0) == -1)
-		return -1;
+    /*
+     * If we used SIG_IGN instead of the do_nothing function,
+     * then we would be unable to tell if we set SIG_IGN (and
+     * thus should reset to SIG_DFL in fuse_remove_signal_handlers)
+     * or if it was already set to SIG_IGN (and should be left
+     * untouched.
+     */
+    if (set_one_signal_handler(SIGHUP, exit_handler, 0) == -1 ||
+        set_one_signal_handler(SIGINT, exit_handler, 0) == -1 ||
+        set_one_signal_handler(SIGTERM, exit_handler, 0) == -1 ||
+        set_one_signal_handler(SIGPIPE, do_nothing, 0) == -1) {
+        return -1;
+    }
 
-	fuse_instance = se;
-	return 0;
+    fuse_instance = se;
+    return 0;
 }
 
 void fuse_remove_signal_handlers(struct fuse_session *se)
 {
-	if (fuse_instance != se)
-		fuse_log(FUSE_LOG_ERR,
-			"fuse: fuse_remove_signal_handlers: unknown session\n");
-	else
-		fuse_instance = NULL;
+    if (fuse_instance != se) {
+        fuse_log(FUSE_LOG_ERR,
+                 "fuse: fuse_remove_signal_handlers: unknown session\n");
+    } else {
+        fuse_instance = NULL;
+    }
 
-	set_one_signal_handler(SIGHUP, exit_handler, 1);
-	set_one_signal_handler(SIGINT, exit_handler, 1);
-	set_one_signal_handler(SIGTERM, exit_handler, 1);
-	set_one_signal_handler(SIGPIPE, do_nothing, 1);
+    set_one_signal_handler(SIGHUP, exit_handler, 1);
+    set_one_signal_handler(SIGINT, exit_handler, 1);
+    set_one_signal_handler(SIGTERM, exit_handler, 1);
+    set_one_signal_handler(SIGPIPE, do_nothing, 1);
 }
diff --git a/tools/virtiofsd/helper.c b/tools/virtiofsd/helper.c
index 22ba87f794..f37de149a3 100644
--- a/tools/virtiofsd/helper.c
+++ b/tools/virtiofsd/helper.c
@@ -1,299 +1,311 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * Helper functions to create (simple) standalone programs. With the
+ * aid of these functions it should be possible to create full FUSE
+ * file system by implementing nothing but the request handlers.
 
-  Helper functions to create (simple) standalone programs. With the
-  aid of these functions it should be possible to create full FUSE
-  file system by implementing nothing but the request handlers.
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
+ * This program can be distributed under the terms of the GNU LGPLv2.
+ * See the file COPYING.LIB.
+ */
 
 #include "config.h"
 #include "fuse_i.h"
+#include "fuse_lowlevel.h"
 #include "fuse_misc.h"
 #include "fuse_opt.h"
-#include "fuse_lowlevel.h"
 #include "mount_util.h"
 
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <stddef.h>
-#include <unistd.h>
 #include <string.h>
-#include <limits.h>
-#include <errno.h>
 #include <sys/param.h>
+#include <unistd.h>
 
-#define FUSE_HELPER_OPT(t, p) \
-	{ t, offsetof(struct fuse_cmdline_opts, p), 1 }
+#define FUSE_HELPER_OPT(t, p)                       \
+    {                                               \
+        t, offsetof(struct fuse_cmdline_opts, p), 1 \
+    }
 
 static const struct fuse_opt fuse_helper_opts[] = {
-	FUSE_HELPER_OPT("-h",		show_help),
-	FUSE_HELPER_OPT("--help",	show_help),
-	FUSE_HELPER_OPT("-V",		show_version),
-	FUSE_HELPER_OPT("--version",	show_version),
-	FUSE_HELPER_OPT("-d",		debug),
-	FUSE_HELPER_OPT("debug",	debug),
-	FUSE_HELPER_OPT("-d",		foreground),
-	FUSE_HELPER_OPT("debug",	foreground),
-	FUSE_OPT_KEY("-d",		FUSE_OPT_KEY_KEEP),
-	FUSE_OPT_KEY("debug",		FUSE_OPT_KEY_KEEP),
-	FUSE_HELPER_OPT("-f",		foreground),
-	FUSE_HELPER_OPT("-s",		singlethread),
-	FUSE_HELPER_OPT("fsname=",	nodefault_subtype),
-	FUSE_OPT_KEY("fsname=",		FUSE_OPT_KEY_KEEP),
-	FUSE_HELPER_OPT("subtype=",	nodefault_subtype),
-	FUSE_OPT_KEY("subtype=",	FUSE_OPT_KEY_KEEP),
-	FUSE_HELPER_OPT("max_idle_threads=%u", max_idle_threads),
-	FUSE_OPT_END
+    FUSE_HELPER_OPT("-h", show_help),
+    FUSE_HELPER_OPT("--help", show_help),
+    FUSE_HELPER_OPT("-V", show_version),
+    FUSE_HELPER_OPT("--version", show_version),
+    FUSE_HELPER_OPT("-d", debug),
+    FUSE_HELPER_OPT("debug", debug),
+    FUSE_HELPER_OPT("-d", foreground),
+    FUSE_HELPER_OPT("debug", foreground),
+    FUSE_OPT_KEY("-d", FUSE_OPT_KEY_KEEP),
+    FUSE_OPT_KEY("debug", FUSE_OPT_KEY_KEEP),
+    FUSE_HELPER_OPT("-f", foreground),
+    FUSE_HELPER_OPT("-s", singlethread),
+    FUSE_HELPER_OPT("fsname=", nodefault_subtype),
+    FUSE_OPT_KEY("fsname=", FUSE_OPT_KEY_KEEP),
+    FUSE_HELPER_OPT("subtype=", nodefault_subtype),
+    FUSE_OPT_KEY("subtype=", FUSE_OPT_KEY_KEEP),
+    FUSE_HELPER_OPT("max_idle_threads=%u", max_idle_threads),
+    FUSE_OPT_END
 };
 
 struct fuse_conn_info_opts {
-	int atomic_o_trunc;
-	int no_remote_posix_lock;
-	int no_remote_flock;
-	int splice_write;
-	int splice_move;
-	int splice_read;
-	int no_splice_write;
-	int no_splice_move;
-	int no_splice_read;
-	int auto_inval_data;
-	int no_auto_inval_data;
-	int no_readdirplus;
-	int no_readdirplus_auto;
-	int async_dio;
-	int no_async_dio;
-	int writeback_cache;
-	int no_writeback_cache;
-	int async_read;
-	int sync_read;
-	unsigned max_write;
-	unsigned max_readahead;
-	unsigned max_background;
-	unsigned congestion_threshold;
-	unsigned time_gran;
-	int set_max_write;
-	int set_max_readahead;
-	int set_max_background;
-	int set_congestion_threshold;
-	int set_time_gran;
+    int atomic_o_trunc;
+    int no_remote_posix_lock;
+    int no_remote_flock;
+    int splice_write;
+    int splice_move;
+    int splice_read;
+    int no_splice_write;
+    int no_splice_move;
+    int no_splice_read;
+    int auto_inval_data;
+    int no_auto_inval_data;
+    int no_readdirplus;
+    int no_readdirplus_auto;
+    int async_dio;
+    int no_async_dio;
+    int writeback_cache;
+    int no_writeback_cache;
+    int async_read;
+    int sync_read;
+    unsigned max_write;
+    unsigned max_readahead;
+    unsigned max_background;
+    unsigned congestion_threshold;
+    unsigned time_gran;
+    int set_max_write;
+    int set_max_readahead;
+    int set_max_background;
+    int set_congestion_threshold;
+    int set_time_gran;
 };
 
-#define CONN_OPTION(t, p, v)					\
-	{ t, offsetof(struct fuse_conn_info_opts, p), v }
+#define CONN_OPTION(t, p, v)                          \
+    {                                                 \
+        t, offsetof(struct fuse_conn_info_opts, p), v \
+    }
 static const struct fuse_opt conn_info_opt_spec[] = {
-	CONN_OPTION("max_write=%u", max_write, 0),
-	CONN_OPTION("max_write=", set_max_write, 1),
-	CONN_OPTION("max_readahead=%u", max_readahead, 0),
-	CONN_OPTION("max_readahead=", set_max_readahead, 1),
-	CONN_OPTION("max_background=%u", max_background, 0),
-	CONN_OPTION("max_background=", set_max_background, 1),
-	CONN_OPTION("congestion_threshold=%u", congestion_threshold, 0),
-	CONN_OPTION("congestion_threshold=", set_congestion_threshold, 1),
-	CONN_OPTION("sync_read", sync_read, 1),
-	CONN_OPTION("async_read", async_read, 1),
-	CONN_OPTION("atomic_o_trunc", atomic_o_trunc, 1),
-	CONN_OPTION("no_remote_lock", no_remote_posix_lock, 1),
-	CONN_OPTION("no_remote_lock", no_remote_flock, 1),
-	CONN_OPTION("no_remote_flock", no_remote_flock, 1),
-	CONN_OPTION("no_remote_posix_lock", no_remote_posix_lock, 1),
-	CONN_OPTION("splice_write", splice_write, 1),
-	CONN_OPTION("no_splice_write", no_splice_write, 1),
-	CONN_OPTION("splice_move", splice_move, 1),
-	CONN_OPTION("no_splice_move", no_splice_move, 1),
-	CONN_OPTION("splice_read", splice_read, 1),
-	CONN_OPTION("no_splice_read", no_splice_read, 1),
-	CONN_OPTION("auto_inval_data", auto_inval_data, 1),
-	CONN_OPTION("no_auto_inval_data", no_auto_inval_data, 1),
-	CONN_OPTION("readdirplus=no", no_readdirplus, 1),
-	CONN_OPTION("readdirplus=yes", no_readdirplus, 0),
-	CONN_OPTION("readdirplus=yes", no_readdirplus_auto, 1),
-	CONN_OPTION("readdirplus=auto", no_readdirplus, 0),
-	CONN_OPTION("readdirplus=auto", no_readdirplus_auto, 0),
-	CONN_OPTION("async_dio", async_dio, 1),
-	CONN_OPTION("no_async_dio", no_async_dio, 1),
-	CONN_OPTION("writeback_cache", writeback_cache, 1),
-	CONN_OPTION("no_writeback_cache", no_writeback_cache, 1),
-	CONN_OPTION("time_gran=%u", time_gran, 0),
-	CONN_OPTION("time_gran=", set_time_gran, 1),
-	FUSE_OPT_END
+    CONN_OPTION("max_write=%u", max_write, 0),
+    CONN_OPTION("max_write=", set_max_write, 1),
+    CONN_OPTION("max_readahead=%u", max_readahead, 0),
+    CONN_OPTION("max_readahead=", set_max_readahead, 1),
+    CONN_OPTION("max_background=%u", max_background, 0),
+    CONN_OPTION("max_background=", set_max_background, 1),
+    CONN_OPTION("congestion_threshold=%u", congestion_threshold, 0),
+    CONN_OPTION("congestion_threshold=", set_congestion_threshold, 1),
+    CONN_OPTION("sync_read", sync_read, 1),
+    CONN_OPTION("async_read", async_read, 1),
+    CONN_OPTION("atomic_o_trunc", atomic_o_trunc, 1),
+    CONN_OPTION("no_remote_lock", no_remote_posix_lock, 1),
+    CONN_OPTION("no_remote_lock", no_remote_flock, 1),
+    CONN_OPTION("no_remote_flock", no_remote_flock, 1),
+    CONN_OPTION("no_remote_posix_lock", no_remote_posix_lock, 1),
+    CONN_OPTION("splice_write", splice_write, 1),
+    CONN_OPTION("no_splice_write", no_splice_write, 1),
+    CONN_OPTION("splice_move", splice_move, 1),
+    CONN_OPTION("no_splice_move", no_splice_move, 1),
+    CONN_OPTION("splice_read", splice_read, 1),
+    CONN_OPTION("no_splice_read", no_splice_read, 1),
+    CONN_OPTION("auto_inval_data", auto_inval_data, 1),
+    CONN_OPTION("no_auto_inval_data", no_auto_inval_data, 1),
+    CONN_OPTION("readdirplus=no", no_readdirplus, 1),
+    CONN_OPTION("readdirplus=yes", no_readdirplus, 0),
+    CONN_OPTION("readdirplus=yes", no_readdirplus_auto, 1),
+    CONN_OPTION("readdirplus=auto", no_readdirplus, 0),
+    CONN_OPTION("readdirplus=auto", no_readdirplus_auto, 0),
+    CONN_OPTION("async_dio", async_dio, 1),
+    CONN_OPTION("no_async_dio", no_async_dio, 1),
+    CONN_OPTION("writeback_cache", writeback_cache, 1),
+    CONN_OPTION("no_writeback_cache", no_writeback_cache, 1),
+    CONN_OPTION("time_gran=%u", time_gran, 0),
+    CONN_OPTION("time_gran=", set_time_gran, 1),
+    FUSE_OPT_END
 };
 
 
 void fuse_cmdline_help(void)
 {
-	printf("    -h   --help            print help\n"
-	       "    -V   --version         print version\n"
-	       "    -d   -o debug          enable debug output (implies -f)\n"
-	       "    -f                     foreground operation\n"
-	       "    -s                     disable multi-threaded operation\n"
-	       "    -o max_idle_threads    the maximum number of idle worker threads\n"
-	       "                           allowed (default: 10)\n");
+    printf(
+        "    -h   --help            print help\n"
+        "    -V   --version         print version\n"
+        "    -d   -o debug          enable debug output (implies -f)\n"
+        "    -f                     foreground operation\n"
+        "    -s                     disable multi-threaded operation\n"
+        "    -o max_idle_threads    the maximum number of idle worker threads\n"
+        "                           allowed (default: 10)\n");
 }
 
 static int fuse_helper_opt_proc(void *data, const char *arg, int key,
-				struct fuse_args *outargs)
+                                struct fuse_args *outargs)
 {
-	(void) outargs;
-	struct fuse_cmdline_opts *opts = data;
-
-	switch (key) {
-	case FUSE_OPT_KEY_NONOPT:
-		if (!opts->mountpoint) {
-			if (fuse_mnt_parse_fuse_fd(arg) != -1) {
-				return fuse_opt_add_opt(&opts->mountpoint, arg);
-			}
-
-			char mountpoint[PATH_MAX] = "";
-			if (realpath(arg, mountpoint) == NULL) {
-				fuse_log(FUSE_LOG_ERR,
-					"fuse: bad mount point `%s': %s\n",
-					arg, strerror(errno));
-				return -1;
-			}
-			return fuse_opt_add_opt(&opts->mountpoint, mountpoint);
-		} else {
-			fuse_log(FUSE_LOG_ERR, "fuse: invalid argument `%s'\n", arg);
-			return -1;
-		}
-
-	default:
-		/* Pass through unknown options */
-		return 1;
-	}
+    (void)outargs;
+    struct fuse_cmdline_opts *opts = data;
+
+    switch (key) {
+    case FUSE_OPT_KEY_NONOPT:
+        if (!opts->mountpoint) {
+            if (fuse_mnt_parse_fuse_fd(arg) != -1) {
+                return fuse_opt_add_opt(&opts->mountpoint, arg);
+            }
+
+            char mountpoint[PATH_MAX] = "";
+            if (realpath(arg, mountpoint) == NULL) {
+                fuse_log(FUSE_LOG_ERR, "fuse: bad mount point `%s': %s\n", arg,
+                         strerror(errno));
+                return -1;
+            }
+            return fuse_opt_add_opt(&opts->mountpoint, mountpoint);
+        } else {
+            fuse_log(FUSE_LOG_ERR, "fuse: invalid argument `%s'\n", arg);
+            return -1;
+        }
+
+    default:
+        /* Pass through unknown options */
+        return 1;
+    }
 }
 
-int fuse_parse_cmdline(struct fuse_args *args,
-		       struct fuse_cmdline_opts *opts)
+int fuse_parse_cmdline(struct fuse_args *args, struct fuse_cmdline_opts *opts)
 {
-	memset(opts, 0, sizeof(struct fuse_cmdline_opts));
+    memset(opts, 0, sizeof(struct fuse_cmdline_opts));
 
-	opts->max_idle_threads = 10;
+    opts->max_idle_threads = 10;
 
-	if (fuse_opt_parse(args, opts, fuse_helper_opts,
-			   fuse_helper_opt_proc) == -1)
-		return -1;
+    if (fuse_opt_parse(args, opts, fuse_helper_opts, fuse_helper_opt_proc) ==
+        -1) {
+        return -1;
+    }
 
-	return 0;
+    return 0;
 }
 
 
 int fuse_daemonize(int foreground)
 {
-	if (!foreground) {
-		int nullfd;
-		int waiter[2];
-		char completed;
-
-		if (pipe(waiter)) {
-			perror("fuse_daemonize: pipe");
-			return -1;
-		}
-
-		/*
-		 * demonize current process by forking it and killing the
-		 * parent.  This makes current process as a child of 'init'.
-		 */
-		switch(fork()) {
-		case -1:
-			perror("fuse_daemonize: fork");
-			return -1;
-		case 0:
-			break;
-		default:
-			(void) read(waiter[0], &completed, sizeof(completed));
-			_exit(0);
-		}
-
-		if (setsid() == -1) {
-			perror("fuse_daemonize: setsid");
-			return -1;
-		}
-
-		(void) chdir("/");
-
-		nullfd = open("/dev/null", O_RDWR, 0);
-		if (nullfd != -1) {
-			(void) dup2(nullfd, 0);
-			(void) dup2(nullfd, 1);
-			(void) dup2(nullfd, 2);
-			if (nullfd > 2)
-				close(nullfd);
-		}
-
-		/* Propagate completion of daemon initialization */
-		completed = 1;
-		(void) write(waiter[1], &completed, sizeof(completed));
-		close(waiter[0]);
-		close(waiter[1]);
-	} else {
-		(void) chdir("/");
-	}
-	return 0;
+    if (!foreground) {
+        int nullfd;
+        int waiter[2];
+        char completed;
+
+        if (pipe(waiter)) {
+            perror("fuse_daemonize: pipe");
+            return -1;
+        }
+
+        /*
+         * demonize current process by forking it and killing the
+         * parent.  This makes current process as a child of 'init'.
+         */
+        switch (fork()) {
+        case -1:
+            perror("fuse_daemonize: fork");
+            return -1;
+        case 0:
+            break;
+        default:
+            (void)read(waiter[0], &completed, sizeof(completed));
+            _exit(0);
+        }
+
+        if (setsid() == -1) {
+            perror("fuse_daemonize: setsid");
+            return -1;
+        }
+
+        (void)chdir("/");
+
+        nullfd = open("/dev/null", O_RDWR, 0);
+        if (nullfd != -1) {
+            (void)dup2(nullfd, 0);
+            (void)dup2(nullfd, 1);
+            (void)dup2(nullfd, 2);
+            if (nullfd > 2) {
+                close(nullfd);
+            }
+        }
+
+        /* Propagate completion of daemon initialization */
+        completed = 1;
+        (void)write(waiter[1], &completed, sizeof(completed));
+        close(waiter[0]);
+        close(waiter[1]);
+    } else {
+        (void)chdir("/");
+    }
+    return 0;
 }
 
 void fuse_apply_conn_info_opts(struct fuse_conn_info_opts *opts,
-			       struct fuse_conn_info *conn)
+                               struct fuse_conn_info *conn)
 {
-	if(opts->set_max_write)
-		conn->max_write = opts->max_write;
-	if(opts->set_max_background)
-		conn->max_background = opts->max_background;
-	if(opts->set_congestion_threshold)
-		conn->congestion_threshold = opts->congestion_threshold;
-	if(opts->set_time_gran)
-		conn->time_gran = opts->time_gran;
-	if(opts->set_max_readahead)
-		conn->max_readahead = opts->max_readahead;
-
-#define LL_ENABLE(cond,cap) \
-	if (cond) conn->want |= (cap)
-#define LL_DISABLE(cond,cap) \
-	if (cond) conn->want &= ~(cap)
-
-	LL_ENABLE(opts->splice_read, FUSE_CAP_SPLICE_READ);
-	LL_DISABLE(opts->no_splice_read, FUSE_CAP_SPLICE_READ);
-
-	LL_ENABLE(opts->splice_write, FUSE_CAP_SPLICE_WRITE);
-	LL_DISABLE(opts->no_splice_write, FUSE_CAP_SPLICE_WRITE);
-
-	LL_ENABLE(opts->splice_move, FUSE_CAP_SPLICE_MOVE);
-	LL_DISABLE(opts->no_splice_move, FUSE_CAP_SPLICE_MOVE);
-
-	LL_ENABLE(opts->auto_inval_data, FUSE_CAP_AUTO_INVAL_DATA);
-	LL_DISABLE(opts->no_auto_inval_data, FUSE_CAP_AUTO_INVAL_DATA);
-
-	LL_DISABLE(opts->no_readdirplus, FUSE_CAP_READDIRPLUS);
-	LL_DISABLE(opts->no_readdirplus_auto, FUSE_CAP_READDIRPLUS_AUTO);
-
-	LL_ENABLE(opts->async_dio, FUSE_CAP_ASYNC_DIO);
-	LL_DISABLE(opts->no_async_dio, FUSE_CAP_ASYNC_DIO);
-
-	LL_ENABLE(opts->writeback_cache, FUSE_CAP_WRITEBACK_CACHE);
-	LL_DISABLE(opts->no_writeback_cache, FUSE_CAP_WRITEBACK_CACHE);
-
-	LL_ENABLE(opts->async_read, FUSE_CAP_ASYNC_READ);
-	LL_DISABLE(opts->sync_read, FUSE_CAP_ASYNC_READ);
-
-	LL_DISABLE(opts->no_remote_posix_lock, FUSE_CAP_POSIX_LOCKS);
-	LL_DISABLE(opts->no_remote_flock, FUSE_CAP_FLOCK_LOCKS);
+    if (opts->set_max_write) {
+        conn->max_write = opts->max_write;
+    }
+    if (opts->set_max_background) {
+        conn->max_background = opts->max_background;
+    }
+    if (opts->set_congestion_threshold) {
+        conn->congestion_threshold = opts->congestion_threshold;
+    }
+    if (opts->set_time_gran) {
+        conn->time_gran = opts->time_gran;
+    }
+    if (opts->set_max_readahead) {
+        conn->max_readahead = opts->max_readahead;
+    }
+
+#define LL_ENABLE(cond, cap) \
+    if (cond)                \
+        conn->want |= (cap)
+#define LL_DISABLE(cond, cap) \
+    if (cond)                 \
+        conn->want &= ~(cap)
+
+    LL_ENABLE(opts->splice_read, FUSE_CAP_SPLICE_READ);
+    LL_DISABLE(opts->no_splice_read, FUSE_CAP_SPLICE_READ);
+
+    LL_ENABLE(opts->splice_write, FUSE_CAP_SPLICE_WRITE);
+    LL_DISABLE(opts->no_splice_write, FUSE_CAP_SPLICE_WRITE);
+
+    LL_ENABLE(opts->splice_move, FUSE_CAP_SPLICE_MOVE);
+    LL_DISABLE(opts->no_splice_move, FUSE_CAP_SPLICE_MOVE);
+
+    LL_ENABLE(opts->auto_inval_data, FUSE_CAP_AUTO_INVAL_DATA);
+    LL_DISABLE(opts->no_auto_inval_data, FUSE_CAP_AUTO_INVAL_DATA);
+
+    LL_DISABLE(opts->no_readdirplus, FUSE_CAP_READDIRPLUS);
+    LL_DISABLE(opts->no_readdirplus_auto, FUSE_CAP_READDIRPLUS_AUTO);
+
+    LL_ENABLE(opts->async_dio, FUSE_CAP_ASYNC_DIO);
+    LL_DISABLE(opts->no_async_dio, FUSE_CAP_ASYNC_DIO);
+
+    LL_ENABLE(opts->writeback_cache, FUSE_CAP_WRITEBACK_CACHE);
+    LL_DISABLE(opts->no_writeback_cache, FUSE_CAP_WRITEBACK_CACHE);
+
+    LL_ENABLE(opts->async_read, FUSE_CAP_ASYNC_READ);
+    LL_DISABLE(opts->sync_read, FUSE_CAP_ASYNC_READ);
+
+    LL_DISABLE(opts->no_remote_posix_lock, FUSE_CAP_POSIX_LOCKS);
+    LL_DISABLE(opts->no_remote_flock, FUSE_CAP_FLOCK_LOCKS);
 }
 
-struct fuse_conn_info_opts* fuse_parse_conn_info_opts(struct fuse_args *args)
+struct fuse_conn_info_opts *fuse_parse_conn_info_opts(struct fuse_args *args)
 {
-	struct fuse_conn_info_opts *opts;
-
-	opts = calloc(1, sizeof(struct fuse_conn_info_opts));
-	if(opts == NULL) {
-		fuse_log(FUSE_LOG_ERR, "calloc failed\n");
-		return NULL;
-	}
-	if(fuse_opt_parse(args, opts, conn_info_opt_spec, NULL) == -1) {
-		free(opts);
-		return NULL;
-	}
-	return opts;
+    struct fuse_conn_info_opts *opts;
+
+    opts = calloc(1, sizeof(struct fuse_conn_info_opts));
+    if (opts == NULL) {
+        fuse_log(FUSE_LOG_ERR, "calloc failed\n");
+        return NULL;
+    }
+    if (fuse_opt_parse(args, opts, conn_info_opt_spec, NULL) == -1) {
+        free(opts);
+        return NULL;
+    }
+    return opts;
 }
diff --git a/tools/virtiofsd/passthrough_helpers.h b/tools/virtiofsd/passthrough_helpers.h
index 7c5f561fbc..0b98275ed5 100644
--- a/tools/virtiofsd/passthrough_helpers.h
+++ b/tools/virtiofsd/passthrough_helpers.h
@@ -28,23 +28,24 @@
  * operation
  */
 static int mknod_wrapper(int dirfd, const char *path, const char *link,
-	int mode, dev_t rdev)
+                         int mode, dev_t rdev)
 {
-	int res;
+    int res;
 
-	if (S_ISREG(mode)) {
-		res = openat(dirfd, path, O_CREAT | O_EXCL | O_WRONLY, mode);
-		if (res >= 0)
-			res = close(res);
-	} else if (S_ISDIR(mode)) {
-		res = mkdirat(dirfd, path, mode);
-	} else if (S_ISLNK(mode) && link != NULL) {
-		res = symlinkat(link, dirfd, path);
-	} else if (S_ISFIFO(mode)) {
-		res = mkfifoat(dirfd, path, mode);
-	} else {
-		res = mknodat(dirfd, path, mode, rdev);
-	}
+    if (S_ISREG(mode)) {
+        res = openat(dirfd, path, O_CREAT | O_EXCL | O_WRONLY, mode);
+        if (res >= 0) {
+            res = close(res);
+        }
+    } else if (S_ISDIR(mode)) {
+        res = mkdirat(dirfd, path, mode);
+    } else if (S_ISLNK(mode) && link != NULL) {
+        res = symlinkat(link, dirfd, path);
+    } else if (S_ISFIFO(mode)) {
+        res = mkfifoat(dirfd, path, mode);
+    } else {
+        res = mknodat(dirfd, path, mode, rdev);
+    }
 
-	return res;
+    return res;
 }
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index e5f7115bc1..c5850ef803 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -1,12 +1,12 @@
 /*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU GPLv2.
-  See the file COPYING.
-*/
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+ *
+ * This program can be distributed under the terms of the GNU GPLv2.
+ * See the file COPYING.
+ */
 
-/** @file
+/*
  *
  * This file system mirrors the existing file system hierarchy of the
  * system, starting at the root file system. This is implemented by
@@ -28,7 +28,8 @@
  *
  * Compile with:
  *
- *     gcc -Wall passthrough_ll.c `pkg-config fuse3 --cflags --libs` -o passthrough_ll
+ *     gcc -Wall passthrough_ll.c `pkg-config fuse3 --cflags --libs` -o
+ * passthrough_ll
  *
  * ## Source code ##
  * \include passthrough_ll.c
@@ -39,1299 +40,1365 @@
 
 #include "config.h"
 
-#include <fuse_lowlevel.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <stddef.h>
-#include <stdbool.h>
-#include <string.h>
-#include <limits.h>
-#include <dirent.h>
 #include <assert.h>
+#include <dirent.h>
 #include <errno.h>
+#include <fuse_lowlevel.h>
 #include <inttypes.h>
+#include <limits.h>
 #include <pthread.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/file.h>
 #include <sys/xattr.h>
+#include <unistd.h>
 
 #include "passthrough_helpers.h"
 
-/* We are re-using pointers to our `struct lo_inode` and `struct
-   lo_dirp` elements as inodes. This means that we must be able to
-   store uintptr_t values in a fuse_ino_t variable. The following
-   incantation checks this condition at compile time. */
-#if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 6) && !defined __cplusplus
+/*
+ * We are re-using pointers to our `struct lo_inode` and `struct
+ * lo_dirp` elements as inodes. This means that we must be able to
+ * store uintptr_t values in a fuse_ino_t variable. The following
+ * incantation checks this condition at compile time.
+ */
+#if defined(__GNUC__) &&                                      \
+    (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 6) && \
+    !defined __cplusplus
 _Static_assert(sizeof(fuse_ino_t) >= sizeof(uintptr_t),
-	       "fuse_ino_t too small to hold uintptr_t values!");
+               "fuse_ino_t too small to hold uintptr_t values!");
 #else
-struct _uintptr_to_must_hold_fuse_ino_t_dummy_struct \
-	{ unsigned _uintptr_to_must_hold_fuse_ino_t:
-			((sizeof(fuse_ino_t) >= sizeof(uintptr_t)) ? 1 : -1); };
+struct _uintptr_to_must_hold_fuse_ino_t_dummy_struct {
+    unsigned _uintptr_to_must_hold_fuse_ino_t
+        : ((sizeof(fuse_ino_t) >= sizeof(uintptr_t)) ? 1 : -1);
+};
 #endif
 
 struct lo_inode {
-	struct lo_inode *next; /* protected by lo->mutex */
-	struct lo_inode *prev; /* protected by lo->mutex */
-	int fd;
-	bool is_symlink;
-	ino_t ino;
-	dev_t dev;
-	uint64_t refcount; /* protected by lo->mutex */
+    struct lo_inode *next; /* protected by lo->mutex */
+    struct lo_inode *prev; /* protected by lo->mutex */
+    int fd;
+    bool is_symlink;
+    ino_t ino;
+    dev_t dev;
+    uint64_t refcount; /* protected by lo->mutex */
 };
 
 enum {
-	CACHE_NEVER,
-	CACHE_NORMAL,
-	CACHE_ALWAYS,
+    CACHE_NEVER,
+    CACHE_NORMAL,
+    CACHE_ALWAYS,
 };
 
 struct lo_data {
-	pthread_mutex_t mutex;
-	int debug;
-	int writeback;
-	int flock;
-	int xattr;
-	const char *source;
-	double timeout;
-	int cache;
-	int timeout_set;
-	struct lo_inode root; /* protected by lo->mutex */
+    pthread_mutex_t mutex;
+    int debug;
+    int writeback;
+    int flock;
+    int xattr;
+    const char *source;
+    double timeout;
+    int cache;
+    int timeout_set;
+    struct lo_inode root; /* protected by lo->mutex */
 };
 
 static const struct fuse_opt lo_opts[] = {
-	{ "writeback",
-	  offsetof(struct lo_data, writeback), 1 },
-	{ "no_writeback",
-	  offsetof(struct lo_data, writeback), 0 },
-	{ "source=%s",
-	  offsetof(struct lo_data, source), 0 },
-	{ "flock",
-	  offsetof(struct lo_data, flock), 1 },
-	{ "no_flock",
-	  offsetof(struct lo_data, flock), 0 },
-	{ "xattr",
-	  offsetof(struct lo_data, xattr), 1 },
-	{ "no_xattr",
-	  offsetof(struct lo_data, xattr), 0 },
-	{ "timeout=%lf",
-	  offsetof(struct lo_data, timeout), 0 },
-	{ "timeout=",
-	  offsetof(struct lo_data, timeout_set), 1 },
-	{ "cache=never",
-	  offsetof(struct lo_data, cache), CACHE_NEVER },
-	{ "cache=auto",
-	  offsetof(struct lo_data, cache), CACHE_NORMAL },
-	{ "cache=always",
-	  offsetof(struct lo_data, cache), CACHE_ALWAYS },
-
-	FUSE_OPT_END
+    { "writeback", offsetof(struct lo_data, writeback), 1 },
+    { "no_writeback", offsetof(struct lo_data, writeback), 0 },
+    { "source=%s", offsetof(struct lo_data, source), 0 },
+    { "flock", offsetof(struct lo_data, flock), 1 },
+    { "no_flock", offsetof(struct lo_data, flock), 0 },
+    { "xattr", offsetof(struct lo_data, xattr), 1 },
+    { "no_xattr", offsetof(struct lo_data, xattr), 0 },
+    { "timeout=%lf", offsetof(struct lo_data, timeout), 0 },
+    { "timeout=", offsetof(struct lo_data, timeout_set), 1 },
+    { "cache=never", offsetof(struct lo_data, cache), CACHE_NEVER },
+    { "cache=auto", offsetof(struct lo_data, cache), CACHE_NORMAL },
+    { "cache=always", offsetof(struct lo_data, cache), CACHE_ALWAYS },
+
+    FUSE_OPT_END
 };
 
 static struct lo_data *lo_data(fuse_req_t req)
 {
-	return (struct lo_data *) fuse_req_userdata(req);
+    return (struct lo_data *)fuse_req_userdata(req);
 }
 
 static struct lo_inode *lo_inode(fuse_req_t req, fuse_ino_t ino)
 {
-	if (ino == FUSE_ROOT_ID)
-		return &lo_data(req)->root;
-	else
-		return (struct lo_inode *) (uintptr_t) ino;
+    if (ino == FUSE_ROOT_ID) {
+        return &lo_data(req)->root;
+    } else {
+        return (struct lo_inode *)(uintptr_t)ino;
+    }
 }
 
 static int lo_fd(fuse_req_t req, fuse_ino_t ino)
 {
-	return lo_inode(req, ino)->fd;
+    return lo_inode(req, ino)->fd;
 }
 
 static bool lo_debug(fuse_req_t req)
 {
-	return lo_data(req)->debug != 0;
+    return lo_data(req)->debug != 0;
 }
 
-static void lo_init(void *userdata,
-		    struct fuse_conn_info *conn)
+static void lo_init(void *userdata, struct fuse_conn_info *conn)
 {
-	struct lo_data *lo = (struct lo_data*) userdata;
-
-	if(conn->capable & FUSE_CAP_EXPORT_SUPPORT)
-		conn->want |= FUSE_CAP_EXPORT_SUPPORT;
-
-	if (lo->writeback &&
-	    conn->capable & FUSE_CAP_WRITEBACK_CACHE) {
-		if (lo->debug)
-			fuse_log(FUSE_LOG_DEBUG, "lo_init: activating writeback\n");
-		conn->want |= FUSE_CAP_WRITEBACK_CACHE;
-	}
-	if (lo->flock && conn->capable & FUSE_CAP_FLOCK_LOCKS) {
-		if (lo->debug)
-			fuse_log(FUSE_LOG_DEBUG, "lo_init: activating flock locks\n");
-		conn->want |= FUSE_CAP_FLOCK_LOCKS;
-	}
+    struct lo_data *lo = (struct lo_data *)userdata;
+
+    if (conn->capable & FUSE_CAP_EXPORT_SUPPORT) {
+        conn->want |= FUSE_CAP_EXPORT_SUPPORT;
+    }
+
+    if (lo->writeback && conn->capable & FUSE_CAP_WRITEBACK_CACHE) {
+        if (lo->debug) {
+            fuse_log(FUSE_LOG_DEBUG, "lo_init: activating writeback\n");
+        }
+        conn->want |= FUSE_CAP_WRITEBACK_CACHE;
+    }
+    if (lo->flock && conn->capable & FUSE_CAP_FLOCK_LOCKS) {
+        if (lo->debug) {
+            fuse_log(FUSE_LOG_DEBUG, "lo_init: activating flock locks\n");
+        }
+        conn->want |= FUSE_CAP_FLOCK_LOCKS;
+    }
 }
 
 static void lo_getattr(fuse_req_t req, fuse_ino_t ino,
-			     struct fuse_file_info *fi)
+                       struct fuse_file_info *fi)
 {
-	int res;
-	struct stat buf;
-	struct lo_data *lo = lo_data(req);
+    int res;
+    struct stat buf;
+    struct lo_data *lo = lo_data(req);
 
-	(void) fi;
+    (void)fi;
 
-	res = fstatat(lo_fd(req, ino), "", &buf, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
-	if (res == -1)
-		return (void) fuse_reply_err(req, errno);
+    res =
+        fstatat(lo_fd(req, ino), "", &buf, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
+    if (res == -1) {
+        return (void)fuse_reply_err(req, errno);
+    }
 
-	fuse_reply_attr(req, &buf, lo->timeout);
+    fuse_reply_attr(req, &buf, lo->timeout);
 }
 
 static int utimensat_empty_nofollow(struct lo_inode *inode,
-				    const struct timespec *tv)
+                                    const struct timespec *tv)
 {
-	int res;
-	char procname[64];
-
-	if (inode->is_symlink) {
-		res = utimensat(inode->fd, "", tv,
-				AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
-		if (res == -1 && errno == EINVAL) {
-			/* Sorry, no race free way to set times on symlink. */
-			errno = EPERM;
-		}
-		return res;
-	}
-	sprintf(procname, "/proc/self/fd/%i", inode->fd);
-
-	return utimensat(AT_FDCWD, procname, tv, 0);
+    int res;
+    char procname[64];
+
+    if (inode->is_symlink) {
+        res = utimensat(inode->fd, "", tv, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
+        if (res == -1 && errno == EINVAL) {
+            /* Sorry, no race free way to set times on symlink. */
+            errno = EPERM;
+        }
+        return res;
+    }
+    sprintf(procname, "/proc/self/fd/%i", inode->fd);
+
+    return utimensat(AT_FDCWD, procname, tv, 0);
 }
 
 static void lo_setattr(fuse_req_t req, fuse_ino_t ino, struct stat *attr,
-		       int valid, struct fuse_file_info *fi)
+                       int valid, struct fuse_file_info *fi)
 {
-	int saverr;
-	char procname[64];
-	struct lo_inode *inode = lo_inode(req, ino);
-	int ifd = inode->fd;
-	int res;
-
-	if (valid & FUSE_SET_ATTR_MODE) {
-		if (fi) {
-			res = fchmod(fi->fh, attr->st_mode);
-		} else {
-			sprintf(procname, "/proc/self/fd/%i", ifd);
-			res = chmod(procname, attr->st_mode);
-		}
-		if (res == -1)
-			goto out_err;
-	}
-	if (valid & (FUSE_SET_ATTR_UID | FUSE_SET_ATTR_GID)) {
-		uid_t uid = (valid & FUSE_SET_ATTR_UID) ?
-			attr->st_uid : (uid_t) -1;
-		gid_t gid = (valid & FUSE_SET_ATTR_GID) ?
-			attr->st_gid : (gid_t) -1;
-
-		res = fchownat(ifd, "", uid, gid,
-			       AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
-		if (res == -1)
-			goto out_err;
-	}
-	if (valid & FUSE_SET_ATTR_SIZE) {
-		if (fi) {
-			res = ftruncate(fi->fh, attr->st_size);
-		} else {
-			sprintf(procname, "/proc/self/fd/%i", ifd);
-			res = truncate(procname, attr->st_size);
-		}
-		if (res == -1)
-			goto out_err;
-	}
-	if (valid & (FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME)) {
-		struct timespec tv[2];
-
-		tv[0].tv_sec = 0;
-		tv[1].tv_sec = 0;
-		tv[0].tv_nsec = UTIME_OMIT;
-		tv[1].tv_nsec = UTIME_OMIT;
-
-		if (valid & FUSE_SET_ATTR_ATIME_NOW)
-			tv[0].tv_nsec = UTIME_NOW;
-		else if (valid & FUSE_SET_ATTR_ATIME)
-			tv[0] = attr->st_atim;
-
-		if (valid & FUSE_SET_ATTR_MTIME_NOW)
-			tv[1].tv_nsec = UTIME_NOW;
-		else if (valid & FUSE_SET_ATTR_MTIME)
-			tv[1] = attr->st_mtim;
-
-		if (fi)
-			res = futimens(fi->fh, tv);
-		else
-			res = utimensat_empty_nofollow(inode, tv);
-		if (res == -1)
-			goto out_err;
-	}
-
-	return lo_getattr(req, ino, fi);
+    int saverr;
+    char procname[64];
+    struct lo_inode *inode = lo_inode(req, ino);
+    int ifd = inode->fd;
+    int res;
+
+    if (valid & FUSE_SET_ATTR_MODE) {
+        if (fi) {
+            res = fchmod(fi->fh, attr->st_mode);
+        } else {
+            sprintf(procname, "/proc/self/fd/%i", ifd);
+            res = chmod(procname, attr->st_mode);
+        }
+        if (res == -1) {
+            goto out_err;
+        }
+    }
+    if (valid & (FUSE_SET_ATTR_UID | FUSE_SET_ATTR_GID)) {
+        uid_t uid = (valid & FUSE_SET_ATTR_UID) ? attr->st_uid : (uid_t)-1;
+        gid_t gid = (valid & FUSE_SET_ATTR_GID) ? attr->st_gid : (gid_t)-1;
+
+        res = fchownat(ifd, "", uid, gid, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
+        if (res == -1) {
+            goto out_err;
+        }
+    }
+    if (valid & FUSE_SET_ATTR_SIZE) {
+        if (fi) {
+            res = ftruncate(fi->fh, attr->st_size);
+        } else {
+            sprintf(procname, "/proc/self/fd/%i", ifd);
+            res = truncate(procname, attr->st_size);
+        }
+        if (res == -1) {
+            goto out_err;
+        }
+    }
+    if (valid & (FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME)) {
+        struct timespec tv[2];
+
+        tv[0].tv_sec = 0;
+        tv[1].tv_sec = 0;
+        tv[0].tv_nsec = UTIME_OMIT;
+        tv[1].tv_nsec = UTIME_OMIT;
+
+        if (valid & FUSE_SET_ATTR_ATIME_NOW) {
+            tv[0].tv_nsec = UTIME_NOW;
+        } else if (valid & FUSE_SET_ATTR_ATIME) {
+            tv[0] = attr->st_atim;
+        }
+
+        if (valid & FUSE_SET_ATTR_MTIME_NOW) {
+            tv[1].tv_nsec = UTIME_NOW;
+        } else if (valid & FUSE_SET_ATTR_MTIME) {
+            tv[1] = attr->st_mtim;
+        }
+
+        if (fi) {
+            res = futimens(fi->fh, tv);
+        } else {
+            res = utimensat_empty_nofollow(inode, tv);
+        }
+        if (res == -1) {
+            goto out_err;
+        }
+    }
+
+    return lo_getattr(req, ino, fi);
 
 out_err:
-	saverr = errno;
-	fuse_reply_err(req, saverr);
+    saverr = errno;
+    fuse_reply_err(req, saverr);
 }
 
 static struct lo_inode *lo_find(struct lo_data *lo, struct stat *st)
 {
-	struct lo_inode *p;
-	struct lo_inode *ret = NULL;
-
-	pthread_mutex_lock(&lo->mutex);
-	for (p = lo->root.next; p != &lo->root; p = p->next) {
-		if (p->ino == st->st_ino && p->dev == st->st_dev) {
-			assert(p->refcount > 0);
-			ret = p;
-			ret->refcount++;
-			break;
-		}
-	}
-	pthread_mutex_unlock(&lo->mutex);
-	return ret;
+    struct lo_inode *p;
+    struct lo_inode *ret = NULL;
+
+    pthread_mutex_lock(&lo->mutex);
+    for (p = lo->root.next; p != &lo->root; p = p->next) {
+        if (p->ino == st->st_ino && p->dev == st->st_dev) {
+            assert(p->refcount > 0);
+            ret = p;
+            ret->refcount++;
+            break;
+        }
+    }
+    pthread_mutex_unlock(&lo->mutex);
+    return ret;
 }
 
 static int lo_do_lookup(fuse_req_t req, fuse_ino_t parent, const char *name,
-			 struct fuse_entry_param *e)
+                        struct fuse_entry_param *e)
 {
-	int newfd;
-	int res;
-	int saverr;
-	struct lo_data *lo = lo_data(req);
-	struct lo_inode *inode;
-
-	memset(e, 0, sizeof(*e));
-	e->attr_timeout = lo->timeout;
-	e->entry_timeout = lo->timeout;
-
-	newfd = openat(lo_fd(req, parent), name, O_PATH | O_NOFOLLOW);
-	if (newfd == -1)
-		goto out_err;
-
-	res = fstatat(newfd, "", &e->attr, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
-	if (res == -1)
-		goto out_err;
-
-	inode = lo_find(lo_data(req), &e->attr);
-	if (inode) {
-		close(newfd);
-		newfd = -1;
-	} else {
-		struct lo_inode *prev, *next;
-
-		saverr = ENOMEM;
-		inode = calloc(1, sizeof(struct lo_inode));
-		if (!inode)
-			goto out_err;
-
-		inode->is_symlink = S_ISLNK(e->attr.st_mode);
-		inode->refcount = 1;
-		inode->fd = newfd;
-		inode->ino = e->attr.st_ino;
-		inode->dev = e->attr.st_dev;
-
-		pthread_mutex_lock(&lo->mutex);
-		prev = &lo->root;
-		next = prev->next;
-		next->prev = inode;
-		inode->next = next;
-		inode->prev = prev;
-		prev->next = inode;
-		pthread_mutex_unlock(&lo->mutex);
-	}
-	e->ino = (uintptr_t) inode;
-
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "  %lli/%s -> %lli\n",
-			(unsigned long long) parent, name, (unsigned long long) e->ino);
-
-	return 0;
+    int newfd;
+    int res;
+    int saverr;
+    struct lo_data *lo = lo_data(req);
+    struct lo_inode *inode;
+
+    memset(e, 0, sizeof(*e));
+    e->attr_timeout = lo->timeout;
+    e->entry_timeout = lo->timeout;
+
+    newfd = openat(lo_fd(req, parent), name, O_PATH | O_NOFOLLOW);
+    if (newfd == -1) {
+        goto out_err;
+    }
+
+    res = fstatat(newfd, "", &e->attr, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
+    if (res == -1) {
+        goto out_err;
+    }
+
+    inode = lo_find(lo_data(req), &e->attr);
+    if (inode) {
+        close(newfd);
+        newfd = -1;
+    } else {
+        struct lo_inode *prev, *next;
+
+        saverr = ENOMEM;
+        inode = calloc(1, sizeof(struct lo_inode));
+        if (!inode) {
+            goto out_err;
+        }
+
+        inode->is_symlink = S_ISLNK(e->attr.st_mode);
+        inode->refcount = 1;
+        inode->fd = newfd;
+        inode->ino = e->attr.st_ino;
+        inode->dev = e->attr.st_dev;
+
+        pthread_mutex_lock(&lo->mutex);
+        prev = &lo->root;
+        next = prev->next;
+        next->prev = inode;
+        inode->next = next;
+        inode->prev = prev;
+        prev->next = inode;
+        pthread_mutex_unlock(&lo->mutex);
+    }
+    e->ino = (uintptr_t)inode;
+
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "  %lli/%s -> %lli\n",
+                 (unsigned long long)parent, name, (unsigned long long)e->ino);
+    }
+
+    return 0;
 
 out_err:
-	saverr = errno;
-	if (newfd != -1)
-		close(newfd);
-	return saverr;
+    saverr = errno;
+    if (newfd != -1) {
+        close(newfd);
+    }
+    return saverr;
 }
 
 static void lo_lookup(fuse_req_t req, fuse_ino_t parent, const char *name)
 {
-	struct fuse_entry_param e;
-	int err;
-
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "lo_lookup(parent=%" PRIu64 ", name=%s)\n",
-			parent, name);
-
-	err = lo_do_lookup(req, parent, name, &e);
-	if (err)
-		fuse_reply_err(req, err);
-	else
-		fuse_reply_entry(req, &e);
+    struct fuse_entry_param e;
+    int err;
+
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "lo_lookup(parent=%" PRIu64 ", name=%s)\n",
+                 parent, name);
+    }
+
+    err = lo_do_lookup(req, parent, name, &e);
+    if (err) {
+        fuse_reply_err(req, err);
+    } else {
+        fuse_reply_entry(req, &e);
+    }
 }
 
 static void lo_mknod_symlink(fuse_req_t req, fuse_ino_t parent,
-			     const char *name, mode_t mode, dev_t rdev,
-			     const char *link)
+                             const char *name, mode_t mode, dev_t rdev,
+                             const char *link)
 {
-	int res;
-	int saverr;
-	struct lo_inode *dir = lo_inode(req, parent);
-	struct fuse_entry_param e;
+    int res;
+    int saverr;
+    struct lo_inode *dir = lo_inode(req, parent);
+    struct fuse_entry_param e;
 
-	saverr = ENOMEM;
+    saverr = ENOMEM;
 
-	res = mknod_wrapper(dir->fd, name, link, mode, rdev);
+    res = mknod_wrapper(dir->fd, name, link, mode, rdev);
 
-	saverr = errno;
-	if (res == -1)
-		goto out;
+    saverr = errno;
+    if (res == -1) {
+        goto out;
+    }
 
-	saverr = lo_do_lookup(req, parent, name, &e);
-	if (saverr)
-		goto out;
+    saverr = lo_do_lookup(req, parent, name, &e);
+    if (saverr) {
+        goto out;
+    }
 
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "  %lli/%s -> %lli\n",
-			(unsigned long long) parent, name, (unsigned long long) e.ino);
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "  %lli/%s -> %lli\n",
+                 (unsigned long long)parent, name, (unsigned long long)e.ino);
+    }
 
-	fuse_reply_entry(req, &e);
-	return;
+    fuse_reply_entry(req, &e);
+    return;
 
 out:
-	fuse_reply_err(req, saverr);
+    fuse_reply_err(req, saverr);
 }
 
-static void lo_mknod(fuse_req_t req, fuse_ino_t parent,
-		     const char *name, mode_t mode, dev_t rdev)
+static void lo_mknod(fuse_req_t req, fuse_ino_t parent, const char *name,
+                     mode_t mode, dev_t rdev)
 {
-	lo_mknod_symlink(req, parent, name, mode, rdev, NULL);
+    lo_mknod_symlink(req, parent, name, mode, rdev, NULL);
 }
 
 static void lo_mkdir(fuse_req_t req, fuse_ino_t parent, const char *name,
-		     mode_t mode)
+                     mode_t mode)
 {
-	lo_mknod_symlink(req, parent, name, S_IFDIR | mode, 0, NULL);
+    lo_mknod_symlink(req, parent, name, S_IFDIR | mode, 0, NULL);
 }
 
-static void lo_symlink(fuse_req_t req, const char *link,
-		       fuse_ino_t parent, const char *name)
+static void lo_symlink(fuse_req_t req, const char *link, fuse_ino_t parent,
+                       const char *name)
 {
-	lo_mknod_symlink(req, parent, name, S_IFLNK, 0, link);
+    lo_mknod_symlink(req, parent, name, S_IFLNK, 0, link);
 }
 
 static int linkat_empty_nofollow(struct lo_inode *inode, int dfd,
-				 const char *name)
+                                 const char *name)
 {
-	int res;
-	char procname[64];
+    int res;
+    char procname[64];
 
-	if (inode->is_symlink) {
-		res = linkat(inode->fd, "", dfd, name, AT_EMPTY_PATH);
-		if (res == -1 && (errno == ENOENT || errno == EINVAL)) {
-			/* Sorry, no race free way to hard-link a symlink. */
-			errno = EPERM;
-		}
-		return res;
-	}
+    if (inode->is_symlink) {
+        res = linkat(inode->fd, "", dfd, name, AT_EMPTY_PATH);
+        if (res == -1 && (errno == ENOENT || errno == EINVAL)) {
+            /* Sorry, no race free way to hard-link a symlink. */
+            errno = EPERM;
+        }
+        return res;
+    }
 
-	sprintf(procname, "/proc/self/fd/%i", inode->fd);
+    sprintf(procname, "/proc/self/fd/%i", inode->fd);
 
-	return linkat(AT_FDCWD, procname, dfd, name, AT_SYMLINK_FOLLOW);
+    return linkat(AT_FDCWD, procname, dfd, name, AT_SYMLINK_FOLLOW);
 }
 
 static void lo_link(fuse_req_t req, fuse_ino_t ino, fuse_ino_t parent,
-		    const char *name)
+                    const char *name)
 {
-	int res;
-	struct lo_data *lo = lo_data(req);
-	struct lo_inode *inode = lo_inode(req, ino);
-	struct fuse_entry_param e;
-	int saverr;
-
-	memset(&e, 0, sizeof(struct fuse_entry_param));
-	e.attr_timeout = lo->timeout;
-	e.entry_timeout = lo->timeout;
-
-	res = linkat_empty_nofollow(inode, lo_fd(req, parent), name);
-	if (res == -1)
-		goto out_err;
-
-	res = fstatat(inode->fd, "", &e.attr, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
-	if (res == -1)
-		goto out_err;
-
-	pthread_mutex_lock(&lo->mutex);
-	inode->refcount++;
-	pthread_mutex_unlock(&lo->mutex);
-	e.ino = (uintptr_t) inode;
-
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "  %lli/%s -> %lli\n",
-			(unsigned long long) parent, name,
-			(unsigned long long) e.ino);
-
-	fuse_reply_entry(req, &e);
-	return;
+    int res;
+    struct lo_data *lo = lo_data(req);
+    struct lo_inode *inode = lo_inode(req, ino);
+    struct fuse_entry_param e;
+    int saverr;
+
+    memset(&e, 0, sizeof(struct fuse_entry_param));
+    e.attr_timeout = lo->timeout;
+    e.entry_timeout = lo->timeout;
+
+    res = linkat_empty_nofollow(inode, lo_fd(req, parent), name);
+    if (res == -1) {
+        goto out_err;
+    }
+
+    res = fstatat(inode->fd, "", &e.attr, AT_EMPTY_PATH | AT_SYMLINK_NOFOLLOW);
+    if (res == -1) {
+        goto out_err;
+    }
+
+    pthread_mutex_lock(&lo->mutex);
+    inode->refcount++;
+    pthread_mutex_unlock(&lo->mutex);
+    e.ino = (uintptr_t)inode;
+
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "  %lli/%s -> %lli\n",
+                 (unsigned long long)parent, name, (unsigned long long)e.ino);
+    }
+
+    fuse_reply_entry(req, &e);
+    return;
 
 out_err:
-	saverr = errno;
-	fuse_reply_err(req, saverr);
+    saverr = errno;
+    fuse_reply_err(req, saverr);
 }
 
 static void lo_rmdir(fuse_req_t req, fuse_ino_t parent, const char *name)
 {
-	int res;
+    int res;
 
-	res = unlinkat(lo_fd(req, parent), name, AT_REMOVEDIR);
+    res = unlinkat(lo_fd(req, parent), name, AT_REMOVEDIR);
 
-	fuse_reply_err(req, res == -1 ? errno : 0);
+    fuse_reply_err(req, res == -1 ? errno : 0);
 }
 
 static void lo_rename(fuse_req_t req, fuse_ino_t parent, const char *name,
-		      fuse_ino_t newparent, const char *newname,
-		      unsigned int flags)
+                      fuse_ino_t newparent, const char *newname,
+                      unsigned int flags)
 {
-	int res;
+    int res;
 
-	if (flags) {
-		fuse_reply_err(req, EINVAL);
-		return;
-	}
+    if (flags) {
+        fuse_reply_err(req, EINVAL);
+        return;
+    }
 
-	res = renameat(lo_fd(req, parent), name,
-			lo_fd(req, newparent), newname);
+    res = renameat(lo_fd(req, parent), name, lo_fd(req, newparent), newname);
 
-	fuse_reply_err(req, res == -1 ? errno : 0);
+    fuse_reply_err(req, res == -1 ? errno : 0);
 }
 
 static void lo_unlink(fuse_req_t req, fuse_ino_t parent, const char *name)
 {
-	int res;
+    int res;
 
-	res = unlinkat(lo_fd(req, parent), name, 0);
+    res = unlinkat(lo_fd(req, parent), name, 0);
 
-	fuse_reply_err(req, res == -1 ? errno : 0);
+    fuse_reply_err(req, res == -1 ? errno : 0);
 }
 
 static void unref_inode(struct lo_data *lo, struct lo_inode *inode, uint64_t n)
 {
-	if (!inode)
-		return;
-
-	pthread_mutex_lock(&lo->mutex);
-	assert(inode->refcount >= n);
-	inode->refcount -= n;
-	if (!inode->refcount) {
-		struct lo_inode *prev, *next;
-
-		prev = inode->prev;
-		next = inode->next;
-		next->prev = prev;
-		prev->next = next;
-
-		pthread_mutex_unlock(&lo->mutex);
-		close(inode->fd);
-		free(inode);
-
-	} else {
-		pthread_mutex_unlock(&lo->mutex);
-	}
+    if (!inode) {
+        return;
+    }
+
+    pthread_mutex_lock(&lo->mutex);
+    assert(inode->refcount >= n);
+    inode->refcount -= n;
+    if (!inode->refcount) {
+        struct lo_inode *prev, *next;
+
+        prev = inode->prev;
+        next = inode->next;
+        next->prev = prev;
+        prev->next = next;
+
+        pthread_mutex_unlock(&lo->mutex);
+        close(inode->fd);
+        free(inode);
+
+    } else {
+        pthread_mutex_unlock(&lo->mutex);
+    }
 }
 
 static void lo_forget_one(fuse_req_t req, fuse_ino_t ino, uint64_t nlookup)
 {
-	struct lo_data *lo = lo_data(req);
-	struct lo_inode *inode = lo_inode(req, ino);
+    struct lo_data *lo = lo_data(req);
+    struct lo_inode *inode = lo_inode(req, ino);
 
-	if (lo_debug(req)) {
-		fuse_log(FUSE_LOG_DEBUG, "  forget %lli %lli -%lli\n",
-			(unsigned long long) ino,
-			(unsigned long long) inode->refcount,
-			(unsigned long long) nlookup);
-	}
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "  forget %lli %lli -%lli\n",
+                 (unsigned long long)ino, (unsigned long long)inode->refcount,
+                 (unsigned long long)nlookup);
+    }
 
-	unref_inode(lo, inode, nlookup);
+    unref_inode(lo, inode, nlookup);
 }
 
 static void lo_forget(fuse_req_t req, fuse_ino_t ino, uint64_t nlookup)
 {
-	lo_forget_one(req, ino, nlookup);
-	fuse_reply_none(req);
+    lo_forget_one(req, ino, nlookup);
+    fuse_reply_none(req);
 }
 
 static void lo_forget_multi(fuse_req_t req, size_t count,
-				struct fuse_forget_data *forgets)
+                            struct fuse_forget_data *forgets)
 {
-	int i;
+    int i;
 
-	for (i = 0; i < count; i++)
-		lo_forget_one(req, forgets[i].ino, forgets[i].nlookup);
-	fuse_reply_none(req);
+    for (i = 0; i < count; i++) {
+        lo_forget_one(req, forgets[i].ino, forgets[i].nlookup);
+    }
+    fuse_reply_none(req);
 }
 
 static void lo_readlink(fuse_req_t req, fuse_ino_t ino)
 {
-	char buf[PATH_MAX + 1];
-	int res;
+    char buf[PATH_MAX + 1];
+    int res;
 
-	res = readlinkat(lo_fd(req, ino), "", buf, sizeof(buf));
-	if (res == -1)
-		return (void) fuse_reply_err(req, errno);
+    res = readlinkat(lo_fd(req, ino), "", buf, sizeof(buf));
+    if (res == -1) {
+        return (void)fuse_reply_err(req, errno);
+    }
 
-	if (res == sizeof(buf))
-		return (void) fuse_reply_err(req, ENAMETOOLONG);
+    if (res == sizeof(buf)) {
+        return (void)fuse_reply_err(req, ENAMETOOLONG);
+    }
 
-	buf[res] = '\0';
+    buf[res] = '\0';
 
-	fuse_reply_readlink(req, buf);
+    fuse_reply_readlink(req, buf);
 }
 
 struct lo_dirp {
-	DIR *dp;
-	struct dirent *entry;
-	off_t offset;
+    DIR *dp;
+    struct dirent *entry;
+    off_t offset;
 };
 
 static struct lo_dirp *lo_dirp(struct fuse_file_info *fi)
 {
-	return (struct lo_dirp *) (uintptr_t) fi->fh;
+    return (struct lo_dirp *)(uintptr_t)fi->fh;
 }
 
-static void lo_opendir(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
+static void lo_opendir(fuse_req_t req, fuse_ino_t ino,
+                       struct fuse_file_info *fi)
 {
-	int error = ENOMEM;
-	struct lo_data *lo = lo_data(req);
-	struct lo_dirp *d;
-	int fd;
-
-	d = calloc(1, sizeof(struct lo_dirp));
-	if (d == NULL)
-		goto out_err;
-
-	fd = openat(lo_fd(req, ino), ".", O_RDONLY);
-	if (fd == -1)
-		goto out_errno;
-
-	d->dp = fdopendir(fd);
-	if (d->dp == NULL)
-		goto out_errno;
-
-	d->offset = 0;
-	d->entry = NULL;
-
-	fi->fh = (uintptr_t) d;
-	if (lo->cache == CACHE_ALWAYS)
-		fi->keep_cache = 1;
-	fuse_reply_open(req, fi);
-	return;
+    int error = ENOMEM;
+    struct lo_data *lo = lo_data(req);
+    struct lo_dirp *d;
+    int fd;
+
+    d = calloc(1, sizeof(struct lo_dirp));
+    if (d == NULL) {
+        goto out_err;
+    }
+
+    fd = openat(lo_fd(req, ino), ".", O_RDONLY);
+    if (fd == -1) {
+        goto out_errno;
+    }
+
+    d->dp = fdopendir(fd);
+    if (d->dp == NULL) {
+        goto out_errno;
+    }
+
+    d->offset = 0;
+    d->entry = NULL;
+
+    fi->fh = (uintptr_t)d;
+    if (lo->cache == CACHE_ALWAYS) {
+        fi->keep_cache = 1;
+    }
+    fuse_reply_open(req, fi);
+    return;
 
 out_errno:
-	error = errno;
+    error = errno;
 out_err:
-	if (d) {
-		if (fd != -1)
-			close(fd);
-		free(d);
-	}
-	fuse_reply_err(req, error);
+    if (d) {
+        if (fd != -1) {
+            close(fd);
+        }
+        free(d);
+    }
+    fuse_reply_err(req, error);
 }
 
 static int is_dot_or_dotdot(const char *name)
 {
-	return name[0] == '.' && (name[1] == '\0' ||
-				  (name[1] == '.' && name[2] == '\0'));
+    return name[0] == '.' &&
+           (name[1] == '\0' || (name[1] == '.' && name[2] == '\0'));
 }
 
 static void lo_do_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
-			  off_t offset, struct fuse_file_info *fi, int plus)
+                          off_t offset, struct fuse_file_info *fi, int plus)
 {
-	struct lo_dirp *d = lo_dirp(fi);
-	char *buf;
-	char *p;
-	size_t rem = size;
-	int err;
-
-	(void) ino;
-
-	buf = calloc(1, size);
-	if (!buf) {
-		err = ENOMEM;
-		goto error;
-	}
-	p = buf;
-
-	if (offset != d->offset) {
-		seekdir(d->dp, offset);
-		d->entry = NULL;
-		d->offset = offset;
-	}
-	while (1) {
-		size_t entsize;
-		off_t nextoff;
-		const char *name;
-
-		if (!d->entry) {
-			errno = 0;
-			d->entry = readdir(d->dp);
-			if (!d->entry) {
-				if (errno) {  // Error
-					err = errno;
-					goto error;
-				} else {  // End of stream
-					break; 
-				}
-			}
-		}
-		nextoff = d->entry->d_off;
-		name = d->entry->d_name;
-		fuse_ino_t entry_ino = 0;
-		if (plus) {
-			struct fuse_entry_param e;
-			if (is_dot_or_dotdot(name)) {
-				e = (struct fuse_entry_param) {
-					.attr.st_ino = d->entry->d_ino,
-					.attr.st_mode = d->entry->d_type << 12,
-				};
-			} else {
-				err = lo_do_lookup(req, ino, name, &e);
-				if (err)
-					goto error;
-				entry_ino = e.ino;
-			}
-
-			entsize = fuse_add_direntry_plus(req, p, rem, name,
-							 &e, nextoff);
-		} else {
-			struct stat st = {
-				.st_ino = d->entry->d_ino,
-				.st_mode = d->entry->d_type << 12,
-			};
-			entsize = fuse_add_direntry(req, p, rem, name,
-						    &st, nextoff);
-		}
-		if (entsize > rem) {
-			if (entry_ino != 0) 
-				lo_forget_one(req, entry_ino, 1);
-			break;
-		}
-		
-		p += entsize;
-		rem -= entsize;
-
-		d->entry = NULL;
-		d->offset = nextoff;
-	}
+    struct lo_dirp *d = lo_dirp(fi);
+    char *buf;
+    char *p;
+    size_t rem = size;
+    int err;
+
+    (void)ino;
+
+    buf = calloc(1, size);
+    if (!buf) {
+        err = ENOMEM;
+        goto error;
+    }
+    p = buf;
+
+    if (offset != d->offset) {
+        seekdir(d->dp, offset);
+        d->entry = NULL;
+        d->offset = offset;
+    }
+    while (1) {
+        size_t entsize;
+        off_t nextoff;
+        const char *name;
+
+        if (!d->entry) {
+            errno = 0;
+            d->entry = readdir(d->dp);
+            if (!d->entry) {
+                if (errno) { /* Error */
+                    err = errno;
+                    goto error;
+                } else { /* End of stream */
+                    break;
+                }
+            }
+        }
+        nextoff = d->entry->d_off;
+        name = d->entry->d_name;
+        fuse_ino_t entry_ino = 0;
+        if (plus) {
+            struct fuse_entry_param e;
+            if (is_dot_or_dotdot(name)) {
+                e = (struct fuse_entry_param){
+                    .attr.st_ino = d->entry->d_ino,
+                    .attr.st_mode = d->entry->d_type << 12,
+                };
+            } else {
+                err = lo_do_lookup(req, ino, name, &e);
+                if (err) {
+                    goto error;
+                }
+                entry_ino = e.ino;
+            }
+
+            entsize = fuse_add_direntry_plus(req, p, rem, name, &e, nextoff);
+        } else {
+            struct stat st = {
+                .st_ino = d->entry->d_ino,
+                .st_mode = d->entry->d_type << 12,
+            };
+            entsize = fuse_add_direntry(req, p, rem, name, &st, nextoff);
+        }
+        if (entsize > rem) {
+            if (entry_ino != 0) {
+                lo_forget_one(req, entry_ino, 1);
+            }
+            break;
+        }
+
+        p += entsize;
+        rem -= entsize;
+
+        d->entry = NULL;
+        d->offset = nextoff;
+    }
 
     err = 0;
 error:
-    // If there's an error, we can only signal it if we haven't stored
-    // any entries yet - otherwise we'd end up with wrong lookup
-    // counts for the entries that are already in the buffer. So we
-    // return what we've collected until that point.
-    if (err && rem == size)
-	    fuse_reply_err(req, err);
-    else
-	    fuse_reply_buf(req, buf, size - rem);
+    /*
+     * If there's an error, we can only signal it if we haven't stored
+     * any entries yet - otherwise we'd end up with wrong lookup
+     * counts for the entries that are already in the buffer. So we
+     * return what we've collected until that point.
+     */
+    if (err && rem == size) {
+        fuse_reply_err(req, err);
+    } else {
+        fuse_reply_buf(req, buf, size - rem);
+    }
     free(buf);
 }
 
 static void lo_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
-		       off_t offset, struct fuse_file_info *fi)
+                       off_t offset, struct fuse_file_info *fi)
 {
-	lo_do_readdir(req, ino, size, offset, fi, 0);
+    lo_do_readdir(req, ino, size, offset, fi, 0);
 }
 
 static void lo_readdirplus(fuse_req_t req, fuse_ino_t ino, size_t size,
-			   off_t offset, struct fuse_file_info *fi)
+                           off_t offset, struct fuse_file_info *fi)
 {
-	lo_do_readdir(req, ino, size, offset, fi, 1);
+    lo_do_readdir(req, ino, size, offset, fi, 1);
 }
 
-static void lo_releasedir(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
+static void lo_releasedir(fuse_req_t req, fuse_ino_t ino,
+                          struct fuse_file_info *fi)
 {
-	struct lo_dirp *d = lo_dirp(fi);
-	(void) ino;
-	closedir(d->dp);
-	free(d);
-	fuse_reply_err(req, 0);
+    struct lo_dirp *d = lo_dirp(fi);
+    (void)ino;
+    closedir(d->dp);
+    free(d);
+    fuse_reply_err(req, 0);
 }
 
 static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name,
-		      mode_t mode, struct fuse_file_info *fi)
+                      mode_t mode, struct fuse_file_info *fi)
 {
-	int fd;
-	struct lo_data *lo = lo_data(req);
-	struct fuse_entry_param e;
-	int err;
-
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "lo_create(parent=%" PRIu64 ", name=%s)\n",
-			parent, name);
-
-	fd = openat(lo_fd(req, parent), name,
-		    (fi->flags | O_CREAT) & ~O_NOFOLLOW, mode);
-	if (fd == -1)
-		return (void) fuse_reply_err(req, errno);
-
-	fi->fh = fd;
-	if (lo->cache == CACHE_NEVER)
-		fi->direct_io = 1;
-	else if (lo->cache == CACHE_ALWAYS)
-		fi->keep_cache = 1;
-
-	err = lo_do_lookup(req, parent, name, &e);
-	if (err)
-		fuse_reply_err(req, err);
-	else
-		fuse_reply_create(req, &e, fi);
+    int fd;
+    struct lo_data *lo = lo_data(req);
+    struct fuse_entry_param e;
+    int err;
+
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "lo_create(parent=%" PRIu64 ", name=%s)\n",
+                 parent, name);
+    }
+
+    fd = openat(lo_fd(req, parent), name, (fi->flags | O_CREAT) & ~O_NOFOLLOW,
+                mode);
+    if (fd == -1) {
+        return (void)fuse_reply_err(req, errno);
+    }
+
+    fi->fh = fd;
+    if (lo->cache == CACHE_NEVER) {
+        fi->direct_io = 1;
+    } else if (lo->cache == CACHE_ALWAYS) {
+        fi->keep_cache = 1;
+    }
+
+    err = lo_do_lookup(req, parent, name, &e);
+    if (err) {
+        fuse_reply_err(req, err);
+    } else {
+        fuse_reply_create(req, &e, fi);
+    }
 }
 
 static void lo_fsyncdir(fuse_req_t req, fuse_ino_t ino, int datasync,
-			struct fuse_file_info *fi)
+                        struct fuse_file_info *fi)
 {
-	int res;
-	int fd = dirfd(lo_dirp(fi)->dp);
-	(void) ino;
-	if (datasync)
-		res = fdatasync(fd);
-	else
-		res = fsync(fd);
-	fuse_reply_err(req, res == -1 ? errno : 0);
+    int res;
+    int fd = dirfd(lo_dirp(fi)->dp);
+    (void)ino;
+    if (datasync) {
+        res = fdatasync(fd);
+    } else {
+        res = fsync(fd);
+    }
+    fuse_reply_err(req, res == -1 ? errno : 0);
 }
 
 static void lo_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
 {
-	int fd;
-	char buf[64];
-	struct lo_data *lo = lo_data(req);
-
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "lo_open(ino=%" PRIu64 ", flags=%d)\n",
-			ino, fi->flags);
-
-	/* With writeback cache, kernel may send read requests even
-	   when userspace opened write-only */
-	if (lo->writeback && (fi->flags & O_ACCMODE) == O_WRONLY) {
-		fi->flags &= ~O_ACCMODE;
-		fi->flags |= O_RDWR;
-	}
-
-	/* With writeback cache, O_APPEND is handled by the kernel.
-	   This breaks atomicity (since the file may change in the
-	   underlying filesystem, so that the kernel's idea of the
-	   end of the file isn't accurate anymore). In this example,
-	   we just accept that. A more rigorous filesystem may want
-	   to return an error here */
-	if (lo->writeback && (fi->flags & O_APPEND))
-		fi->flags &= ~O_APPEND;
-
-	sprintf(buf, "/proc/self/fd/%i", lo_fd(req, ino));
-	fd = open(buf, fi->flags & ~O_NOFOLLOW);
-	if (fd == -1)
-		return (void) fuse_reply_err(req, errno);
-
-	fi->fh = fd;
-	if (lo->cache == CACHE_NEVER)
-		fi->direct_io = 1;
-	else if (lo->cache == CACHE_ALWAYS)
-		fi->keep_cache = 1;
-	fuse_reply_open(req, fi);
+    int fd;
+    char buf[64];
+    struct lo_data *lo = lo_data(req);
+
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "lo_open(ino=%" PRIu64 ", flags=%d)\n", ino,
+                 fi->flags);
+    }
+
+    /*
+     * With writeback cache, kernel may send read requests even
+     * when userspace opened write-only
+     */
+    if (lo->writeback && (fi->flags & O_ACCMODE) == O_WRONLY) {
+        fi->flags &= ~O_ACCMODE;
+        fi->flags |= O_RDWR;
+    }
+
+    /*
+     * With writeback cache, O_APPEND is handled by the kernel.
+     * This breaks atomicity (since the file may change in the
+     * underlying filesystem, so that the kernel's idea of the
+     * end of the file isn't accurate anymore). In this example,
+     * we just accept that. A more rigorous filesystem may want
+     * to return an error here
+     */
+    if (lo->writeback && (fi->flags & O_APPEND)) {
+        fi->flags &= ~O_APPEND;
+    }
+
+    sprintf(buf, "/proc/self/fd/%i", lo_fd(req, ino));
+    fd = open(buf, fi->flags & ~O_NOFOLLOW);
+    if (fd == -1) {
+        return (void)fuse_reply_err(req, errno);
+    }
+
+    fi->fh = fd;
+    if (lo->cache == CACHE_NEVER) {
+        fi->direct_io = 1;
+    } else if (lo->cache == CACHE_ALWAYS) {
+        fi->keep_cache = 1;
+    }
+    fuse_reply_open(req, fi);
 }
 
-static void lo_release(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
+static void lo_release(fuse_req_t req, fuse_ino_t ino,
+                       struct fuse_file_info *fi)
 {
-	(void) ino;
+    (void)ino;
 
-	close(fi->fh);
-	fuse_reply_err(req, 0);
+    close(fi->fh);
+    fuse_reply_err(req, 0);
 }
 
 static void lo_flush(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
 {
-	int res;
-	(void) ino;
-	res = close(dup(fi->fh));
-	fuse_reply_err(req, res == -1 ? errno : 0);
+    int res;
+    (void)ino;
+    res = close(dup(fi->fh));
+    fuse_reply_err(req, res == -1 ? errno : 0);
 }
 
 static void lo_fsync(fuse_req_t req, fuse_ino_t ino, int datasync,
-		     struct fuse_file_info *fi)
+                     struct fuse_file_info *fi)
 {
-	int res;
-	(void) ino;
-	if (datasync)
-		res = fdatasync(fi->fh);
-	else
-		res = fsync(fi->fh);
-	fuse_reply_err(req, res == -1 ? errno : 0);
+    int res;
+    (void)ino;
+    if (datasync) {
+        res = fdatasync(fi->fh);
+    } else {
+        res = fsync(fi->fh);
+    }
+    fuse_reply_err(req, res == -1 ? errno : 0);
 }
 
-static void lo_read(fuse_req_t req, fuse_ino_t ino, size_t size,
-		    off_t offset, struct fuse_file_info *fi)
+static void lo_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t offset,
+                    struct fuse_file_info *fi)
 {
-	struct fuse_bufvec buf = FUSE_BUFVEC_INIT(size);
+    struct fuse_bufvec buf = FUSE_BUFVEC_INIT(size);
 
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "lo_read(ino=%" PRIu64 ", size=%zd, "
-			"off=%lu)\n", ino, size, (unsigned long) offset);
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG,
+                 "lo_read(ino=%" PRIu64 ", size=%zd, "
+                 "off=%lu)\n",
+                 ino, size, (unsigned long)offset);
+    }
 
-	buf.buf[0].flags = FUSE_BUF_IS_FD | FUSE_BUF_FD_SEEK;
-	buf.buf[0].fd = fi->fh;
-	buf.buf[0].pos = offset;
+    buf.buf[0].flags = FUSE_BUF_IS_FD | FUSE_BUF_FD_SEEK;
+    buf.buf[0].fd = fi->fh;
+    buf.buf[0].pos = offset;
 
-	fuse_reply_data(req, &buf, FUSE_BUF_SPLICE_MOVE);
+    fuse_reply_data(req, &buf, FUSE_BUF_SPLICE_MOVE);
 }
 
 static void lo_write_buf(fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_bufvec *in_buf, off_t off,
-			 struct fuse_file_info *fi)
+                         struct fuse_bufvec *in_buf, off_t off,
+                         struct fuse_file_info *fi)
 {
-	(void) ino;
-	ssize_t res;
-	struct fuse_bufvec out_buf = FUSE_BUFVEC_INIT(fuse_buf_size(in_buf));
-
-	out_buf.buf[0].flags = FUSE_BUF_IS_FD | FUSE_BUF_FD_SEEK;
-	out_buf.buf[0].fd = fi->fh;
-	out_buf.buf[0].pos = off;
-
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "lo_write(ino=%" PRIu64 ", size=%zd, off=%lu)\n",
-			ino, out_buf.buf[0].size, (unsigned long) off);
-
-	res = fuse_buf_copy(&out_buf, in_buf, 0);
-	if(res < 0)
-		fuse_reply_err(req, -res);
-	else
-		fuse_reply_write(req, (size_t) res);
+    (void)ino;
+    ssize_t res;
+    struct fuse_bufvec out_buf = FUSE_BUFVEC_INIT(fuse_buf_size(in_buf));
+
+    out_buf.buf[0].flags = FUSE_BUF_IS_FD | FUSE_BUF_FD_SEEK;
+    out_buf.buf[0].fd = fi->fh;
+    out_buf.buf[0].pos = off;
+
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG,
+                 "lo_write(ino=%" PRIu64 ", size=%zd, off=%lu)\n", ino,
+                 out_buf.buf[0].size, (unsigned long)off);
+    }
+
+    res = fuse_buf_copy(&out_buf, in_buf, 0);
+    if (res < 0) {
+        fuse_reply_err(req, -res);
+    } else {
+        fuse_reply_write(req, (size_t)res);
+    }
 }
 
 static void lo_statfs(fuse_req_t req, fuse_ino_t ino)
 {
-	int res;
-	struct statvfs stbuf;
-
-	res = fstatvfs(lo_fd(req, ino), &stbuf);
-	if (res == -1)
-		fuse_reply_err(req, errno);
-	else
-		fuse_reply_statfs(req, &stbuf);
+    int res;
+    struct statvfs stbuf;
+
+    res = fstatvfs(lo_fd(req, ino), &stbuf);
+    if (res == -1) {
+        fuse_reply_err(req, errno);
+    } else {
+        fuse_reply_statfs(req, &stbuf);
+    }
 }
 
-static void lo_fallocate(fuse_req_t req, fuse_ino_t ino, int mode,
-			 off_t offset, off_t length, struct fuse_file_info *fi)
+static void lo_fallocate(fuse_req_t req, fuse_ino_t ino, int mode, off_t offset,
+                         off_t length, struct fuse_file_info *fi)
 {
-	int err = EOPNOTSUPP;
-	(void) ino;
+    int err = EOPNOTSUPP;
+    (void)ino;
 
 #ifdef HAVE_FALLOCATE
-	err = fallocate(fi->fh, mode, offset, length);
-	if (err < 0)
-		err = errno;
+    err = fallocate(fi->fh, mode, offset, length);
+    if (err < 0) {
+        err = errno;
+    }
 
 #elif defined(HAVE_POSIX_FALLOCATE)
-	if (mode) {
-		fuse_reply_err(req, EOPNOTSUPP);
-		return;
-	}
+    if (mode) {
+        fuse_reply_err(req, EOPNOTSUPP);
+        return;
+    }
 
-	err = posix_fallocate(fi->fh, offset, length);
+    err = posix_fallocate(fi->fh, offset, length);
 #endif
 
-	fuse_reply_err(req, err);
+    fuse_reply_err(req, err);
 }
 
 static void lo_flock(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi,
-		     int op)
+                     int op)
 {
-	int res;
-	(void) ino;
+    int res;
+    (void)ino;
 
-	res = flock(fi->fh, op);
+    res = flock(fi->fh, op);
 
-	fuse_reply_err(req, res == -1 ? errno : 0);
+    fuse_reply_err(req, res == -1 ? errno : 0);
 }
 
 static void lo_getxattr(fuse_req_t req, fuse_ino_t ino, const char *name,
-			size_t size)
+                        size_t size)
 {
-	char *value = NULL;
-	char procname[64];
-	struct lo_inode *inode = lo_inode(req, ino);
-	ssize_t ret;
-	int saverr;
-
-	saverr = ENOSYS;
-	if (!lo_data(req)->xattr)
-		goto out;
-
-	if (lo_debug(req)) {
-		fuse_log(FUSE_LOG_DEBUG, "lo_getxattr(ino=%" PRIu64 ", name=%s size=%zd)\n",
-			ino, name, size);
-	}
-
-	if (inode->is_symlink) {
-		/* Sorry, no race free way to getxattr on symlink. */
-		saverr = EPERM;
-		goto out;
-	}
-
-	sprintf(procname, "/proc/self/fd/%i", inode->fd);
-
-	if (size) {
-		value = malloc(size);
-		if (!value)
-			goto out_err;
-
-		ret = getxattr(procname, name, value, size);
-		if (ret == -1)
-			goto out_err;
-		saverr = 0;
-		if (ret == 0)
-			goto out;
-
-		fuse_reply_buf(req, value, ret);
-	} else {
-		ret = getxattr(procname, name, NULL, 0);
-		if (ret == -1)
-			goto out_err;
-
-		fuse_reply_xattr(req, ret);
-	}
+    char *value = NULL;
+    char procname[64];
+    struct lo_inode *inode = lo_inode(req, ino);
+    ssize_t ret;
+    int saverr;
+
+    saverr = ENOSYS;
+    if (!lo_data(req)->xattr) {
+        goto out;
+    }
+
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG,
+                 "lo_getxattr(ino=%" PRIu64 ", name=%s size=%zd)\n", ino, name,
+                 size);
+    }
+
+    if (inode->is_symlink) {
+        /* Sorry, no race free way to getxattr on symlink. */
+        saverr = EPERM;
+        goto out;
+    }
+
+    sprintf(procname, "/proc/self/fd/%i", inode->fd);
+
+    if (size) {
+        value = malloc(size);
+        if (!value) {
+            goto out_err;
+        }
+
+        ret = getxattr(procname, name, value, size);
+        if (ret == -1) {
+            goto out_err;
+        }
+        saverr = 0;
+        if (ret == 0) {
+            goto out;
+        }
+
+        fuse_reply_buf(req, value, ret);
+    } else {
+        ret = getxattr(procname, name, NULL, 0);
+        if (ret == -1) {
+            goto out_err;
+        }
+
+        fuse_reply_xattr(req, ret);
+    }
 out_free:
-	free(value);
-	return;
+    free(value);
+    return;
 
 out_err:
-	saverr = errno;
+    saverr = errno;
 out:
-	fuse_reply_err(req, saverr);
-	goto out_free;
+    fuse_reply_err(req, saverr);
+    goto out_free;
 }
 
 static void lo_listxattr(fuse_req_t req, fuse_ino_t ino, size_t size)
 {
-	char *value = NULL;
-	char procname[64];
-	struct lo_inode *inode = lo_inode(req, ino);
-	ssize_t ret;
-	int saverr;
-
-	saverr = ENOSYS;
-	if (!lo_data(req)->xattr)
-		goto out;
-
-	if (lo_debug(req)) {
-		fuse_log(FUSE_LOG_DEBUG, "lo_listxattr(ino=%" PRIu64 ", size=%zd)\n",
-			ino, size);
-	}
-
-	if (inode->is_symlink) {
-		/* Sorry, no race free way to listxattr on symlink. */
-		saverr = EPERM;
-		goto out;
-	}
-
-	sprintf(procname, "/proc/self/fd/%i", inode->fd);
-
-	if (size) {
-		value = malloc(size);
-		if (!value)
-			goto out_err;
-
-		ret = listxattr(procname, value, size);
-		if (ret == -1)
-			goto out_err;
-		saverr = 0;
-		if (ret == 0)
-			goto out;
-
-		fuse_reply_buf(req, value, ret);
-	} else {
-		ret = listxattr(procname, NULL, 0);
-		if (ret == -1)
-			goto out_err;
-
-		fuse_reply_xattr(req, ret);
-	}
+    char *value = NULL;
+    char procname[64];
+    struct lo_inode *inode = lo_inode(req, ino);
+    ssize_t ret;
+    int saverr;
+
+    saverr = ENOSYS;
+    if (!lo_data(req)->xattr) {
+        goto out;
+    }
+
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "lo_listxattr(ino=%" PRIu64 ", size=%zd)\n",
+                 ino, size);
+    }
+
+    if (inode->is_symlink) {
+        /* Sorry, no race free way to listxattr on symlink. */
+        saverr = EPERM;
+        goto out;
+    }
+
+    sprintf(procname, "/proc/self/fd/%i", inode->fd);
+
+    if (size) {
+        value = malloc(size);
+        if (!value) {
+            goto out_err;
+        }
+
+        ret = listxattr(procname, value, size);
+        if (ret == -1) {
+            goto out_err;
+        }
+        saverr = 0;
+        if (ret == 0) {
+            goto out;
+        }
+
+        fuse_reply_buf(req, value, ret);
+    } else {
+        ret = listxattr(procname, NULL, 0);
+        if (ret == -1) {
+            goto out_err;
+        }
+
+        fuse_reply_xattr(req, ret);
+    }
 out_free:
-	free(value);
-	return;
+    free(value);
+    return;
 
 out_err:
-	saverr = errno;
+    saverr = errno;
 out:
-	fuse_reply_err(req, saverr);
-	goto out_free;
+    fuse_reply_err(req, saverr);
+    goto out_free;
 }
 
 static void lo_setxattr(fuse_req_t req, fuse_ino_t ino, const char *name,
-			const char *value, size_t size, int flags)
+                        const char *value, size_t size, int flags)
 {
-	char procname[64];
-	struct lo_inode *inode = lo_inode(req, ino);
-	ssize_t ret;
-	int saverr;
+    char procname[64];
+    struct lo_inode *inode = lo_inode(req, ino);
+    ssize_t ret;
+    int saverr;
 
-	saverr = ENOSYS;
-	if (!lo_data(req)->xattr)
-		goto out;
+    saverr = ENOSYS;
+    if (!lo_data(req)->xattr) {
+        goto out;
+    }
 
-	if (lo_debug(req)) {
-		fuse_log(FUSE_LOG_DEBUG, "lo_setxattr(ino=%" PRIu64 ", name=%s value=%s size=%zd)\n",
-			ino, name, value, size);
-	}
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG,
+                 "lo_setxattr(ino=%" PRIu64 ", name=%s value=%s size=%zd)\n",
+                 ino, name, value, size);
+    }
 
-	if (inode->is_symlink) {
-		/* Sorry, no race free way to setxattr on symlink. */
-		saverr = EPERM;
-		goto out;
-	}
+    if (inode->is_symlink) {
+        /* Sorry, no race free way to setxattr on symlink. */
+        saverr = EPERM;
+        goto out;
+    }
 
-	sprintf(procname, "/proc/self/fd/%i", inode->fd);
+    sprintf(procname, "/proc/self/fd/%i", inode->fd);
 
-	ret = setxattr(procname, name, value, size, flags);
-	saverr = ret == -1 ? errno : 0;
+    ret = setxattr(procname, name, value, size, flags);
+    saverr = ret == -1 ? errno : 0;
 
 out:
-	fuse_reply_err(req, saverr);
+    fuse_reply_err(req, saverr);
 }
 
 static void lo_removexattr(fuse_req_t req, fuse_ino_t ino, const char *name)
 {
-	char procname[64];
-	struct lo_inode *inode = lo_inode(req, ino);
-	ssize_t ret;
-	int saverr;
+    char procname[64];
+    struct lo_inode *inode = lo_inode(req, ino);
+    ssize_t ret;
+    int saverr;
 
-	saverr = ENOSYS;
-	if (!lo_data(req)->xattr)
-		goto out;
+    saverr = ENOSYS;
+    if (!lo_data(req)->xattr) {
+        goto out;
+    }
 
-	if (lo_debug(req)) {
-		fuse_log(FUSE_LOG_DEBUG, "lo_removexattr(ino=%" PRIu64 ", name=%s)\n",
-			ino, name);
-	}
+    if (lo_debug(req)) {
+        fuse_log(FUSE_LOG_DEBUG, "lo_removexattr(ino=%" PRIu64 ", name=%s)\n",
+                 ino, name);
+    }
 
-	if (inode->is_symlink) {
-		/* Sorry, no race free way to setxattr on symlink. */
-		saverr = EPERM;
-		goto out;
-	}
+    if (inode->is_symlink) {
+        /* Sorry, no race free way to setxattr on symlink. */
+        saverr = EPERM;
+        goto out;
+    }
 
-	sprintf(procname, "/proc/self/fd/%i", inode->fd);
+    sprintf(procname, "/proc/self/fd/%i", inode->fd);
 
-	ret = removexattr(procname, name);
-	saverr = ret == -1 ? errno : 0;
+    ret = removexattr(procname, name);
+    saverr = ret == -1 ? errno : 0;
 
 out:
-	fuse_reply_err(req, saverr);
+    fuse_reply_err(req, saverr);
 }
 
 #ifdef HAVE_COPY_FILE_RANGE
 static void lo_copy_file_range(fuse_req_t req, fuse_ino_t ino_in, off_t off_in,
-			       struct fuse_file_info *fi_in,
-			       fuse_ino_t ino_out, off_t off_out,
-			       struct fuse_file_info *fi_out, size_t len,
-			       int flags)
+                               struct fuse_file_info *fi_in, fuse_ino_t ino_out,
+                               off_t off_out, struct fuse_file_info *fi_out,
+                               size_t len, int flags)
 {
-	ssize_t res;
-
-	if (lo_debug(req))
-		fuse_log(FUSE_LOG_DEBUG, "lo_copy_file_range(ino=%" PRIu64 "/fd=%lu, "
-				"off=%lu, ino=%" PRIu64 "/fd=%lu, "
-				"off=%lu, size=%zd, flags=0x%x)\n",
-			ino_in, fi_in->fh, off_in, ino_out, fi_out->fh, off_out,
-			len, flags);
-
-	res = copy_file_range(fi_in->fh, &off_in, fi_out->fh, &off_out, len,
-			      flags);
-	if (res < 0)
-		fuse_reply_err(req, -errno);
-	else
-		fuse_reply_write(req, res);
+    ssize_t res;
+
+    if (lo_debug(req))
+        fuse_log(FUSE_LOG_DEBUG,
+                 "lo_copy_file_range(ino=%" PRIu64 "/fd=%lu, "
+                 "off=%lu, ino=%" PRIu64 "/fd=%lu, "
+                 "off=%lu, size=%zd, flags=0x%x)\n",
+                 ino_in, fi_in->fh, off_in, ino_out, fi_out->fh, off_out, len,
+                 flags);
+
+    res = copy_file_range(fi_in->fh, &off_in, fi_out->fh, &off_out, len, flags);
+    if (res < 0) {
+        fuse_reply_err(req, -errno);
+    } else {
+        fuse_reply_write(req, res);
+    }
 }
 #endif
 
 static void lo_lseek(fuse_req_t req, fuse_ino_t ino, off_t off, int whence,
-		     struct fuse_file_info *fi)
+                     struct fuse_file_info *fi)
 {
-	off_t res;
-
-	(void)ino;
-	res = lseek(fi->fh, off, whence);
-	if (res != -1)
-		fuse_reply_lseek(req, res);
-	else
-		fuse_reply_err(req, errno);
+    off_t res;
+
+    (void)ino;
+    res = lseek(fi->fh, off, whence);
+    if (res != -1) {
+        fuse_reply_lseek(req, res);
+    } else {
+        fuse_reply_err(req, errno);
+    }
 }
 
 static struct fuse_lowlevel_ops lo_oper = {
-	.init		= lo_init,
-	.lookup		= lo_lookup,
-	.mkdir		= lo_mkdir,
-	.mknod		= lo_mknod,
-	.symlink	= lo_symlink,
-	.link		= lo_link,
-	.unlink		= lo_unlink,
-	.rmdir		= lo_rmdir,
-	.rename		= lo_rename,
-	.forget		= lo_forget,
-	.forget_multi	= lo_forget_multi,
-	.getattr	= lo_getattr,
-	.setattr	= lo_setattr,
-	.readlink	= lo_readlink,
-	.opendir	= lo_opendir,
-	.readdir	= lo_readdir,
-	.readdirplus	= lo_readdirplus,
-	.releasedir	= lo_releasedir,
-	.fsyncdir	= lo_fsyncdir,
-	.create		= lo_create,
-	.open		= lo_open,
-	.release	= lo_release,
-	.flush		= lo_flush,
-	.fsync		= lo_fsync,
-	.read		= lo_read,
-	.write_buf      = lo_write_buf,
-	.statfs		= lo_statfs,
-	.fallocate	= lo_fallocate,
-	.flock		= lo_flock,
-	.getxattr	= lo_getxattr,
-	.listxattr	= lo_listxattr,
-	.setxattr	= lo_setxattr,
-	.removexattr	= lo_removexattr,
+    .init = lo_init,
+    .lookup = lo_lookup,
+    .mkdir = lo_mkdir,
+    .mknod = lo_mknod,
+    .symlink = lo_symlink,
+    .link = lo_link,
+    .unlink = lo_unlink,
+    .rmdir = lo_rmdir,
+    .rename = lo_rename,
+    .forget = lo_forget,
+    .forget_multi = lo_forget_multi,
+    .getattr = lo_getattr,
+    .setattr = lo_setattr,
+    .readlink = lo_readlink,
+    .opendir = lo_opendir,
+    .readdir = lo_readdir,
+    .readdirplus = lo_readdirplus,
+    .releasedir = lo_releasedir,
+    .fsyncdir = lo_fsyncdir,
+    .create = lo_create,
+    .open = lo_open,
+    .release = lo_release,
+    .flush = lo_flush,
+    .fsync = lo_fsync,
+    .read = lo_read,
+    .write_buf = lo_write_buf,
+    .statfs = lo_statfs,
+    .fallocate = lo_fallocate,
+    .flock = lo_flock,
+    .getxattr = lo_getxattr,
+    .listxattr = lo_listxattr,
+    .setxattr = lo_setxattr,
+    .removexattr = lo_removexattr,
 #ifdef HAVE_COPY_FILE_RANGE
-	.copy_file_range = lo_copy_file_range,
+    .copy_file_range = lo_copy_file_range,
 #endif
-	.lseek		= lo_lseek,
+    .lseek = lo_lseek,
 };
 
 int main(int argc, char *argv[])
 {
-	struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
-	struct fuse_session *se;
-	struct fuse_cmdline_opts opts;
-	struct lo_data lo = { .debug = 0,
-	                      .writeback = 0 };
-	int ret = -1;
-
-	/* Don't mask creation mode, kernel already did that */
-	umask(0);
-
-	pthread_mutex_init(&lo.mutex, NULL);
-	lo.root.next = lo.root.prev = &lo.root;
-	lo.root.fd = -1;
-	lo.cache = CACHE_NORMAL;
-
-	if (fuse_parse_cmdline(&args, &opts) != 0)
-		return 1;
-	if (opts.show_help) {
-		printf("usage: %s [options] <mountpoint>\n\n", argv[0]);
-		fuse_cmdline_help();
-		fuse_lowlevel_help();
-		ret = 0;
-		goto err_out1;
-	} else if (opts.show_version) {
-		fuse_lowlevel_version();
-		ret = 0;
-		goto err_out1;
-	}
-
-	if(opts.mountpoint == NULL) {
-		printf("usage: %s [options] <mountpoint>\n", argv[0]);
-		printf("       %s --help\n", argv[0]);
-		ret = 1;
-		goto err_out1;
-	}
-
-	if (fuse_opt_parse(&args, &lo, lo_opts, NULL)== -1)
-		return 1;
-
-	lo.debug = opts.debug;
-	lo.root.refcount = 2;
-	if (lo.source) {
-		struct stat stat;
-		int res;
-
-		res = lstat(lo.source, &stat);
-		if (res == -1) {
-			fuse_log(FUSE_LOG_ERR, "failed to stat source (\"%s\"): %m\n",
-				 lo.source);
-			exit(1);
-		}
-		if (!S_ISDIR(stat.st_mode)) {
-			fuse_log(FUSE_LOG_ERR, "source is not a directory\n");
-			exit(1);
-		}
-
-	} else {
-		lo.source = "/";
-	}
-	lo.root.is_symlink = false;
-	if (!lo.timeout_set) {
-		switch (lo.cache) {
-		case CACHE_NEVER:
-			lo.timeout = 0.0;
-			break;
-
-		case CACHE_NORMAL:
-			lo.timeout = 1.0;
-			break;
-
-		case CACHE_ALWAYS:
-			lo.timeout = 86400.0;
-			break;
-		}
-	} else if (lo.timeout < 0) {
-		fuse_log(FUSE_LOG_ERR, "timeout is negative (%lf)\n",
-			 lo.timeout);
-		exit(1);
-	}
-
-	lo.root.fd = open(lo.source, O_PATH);
-	if (lo.root.fd == -1) {
-		fuse_log(FUSE_LOG_ERR, "open(\"%s\", O_PATH): %m\n",
-			 lo.source);
-		exit(1);
-	}
-
-	se = fuse_session_new(&args, &lo_oper, sizeof(lo_oper), &lo);
-	if (se == NULL)
-	    goto err_out1;
-
-	if (fuse_set_signal_handlers(se) != 0)
-	    goto err_out2;
-
-	if (fuse_session_mount(se, opts.mountpoint) != 0)
-	    goto err_out3;
-
-	fuse_daemonize(opts.foreground);
-
-	/* Block until ctrl+c or fusermount -u */
-	if (opts.singlethread)
-		ret = fuse_session_loop(se);
-	else
-		ret = fuse_session_loop_mt(se, opts.clone_fd);
-
-	fuse_session_unmount(se);
+    struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
+    struct fuse_session *se;
+    struct fuse_cmdline_opts opts;
+    struct lo_data lo = { .debug = 0, .writeback = 0 };
+    int ret = -1;
+
+    /* Don't mask creation mode, kernel already did that */
+    umask(0);
+
+    pthread_mutex_init(&lo.mutex, NULL);
+    lo.root.next = lo.root.prev = &lo.root;
+    lo.root.fd = -1;
+    lo.cache = CACHE_NORMAL;
+
+    if (fuse_parse_cmdline(&args, &opts) != 0) {
+        return 1;
+    }
+    if (opts.show_help) {
+        printf("usage: %s [options] <mountpoint>\n\n", argv[0]);
+        fuse_cmdline_help();
+        fuse_lowlevel_help();
+        ret = 0;
+        goto err_out1;
+    } else if (opts.show_version) {
+        fuse_lowlevel_version();
+        ret = 0;
+        goto err_out1;
+    }
+
+    if (opts.mountpoint == NULL) {
+        printf("usage: %s [options] <mountpoint>\n", argv[0]);
+        printf("       %s --help\n", argv[0]);
+        ret = 1;
+        goto err_out1;
+    }
+
+    if (fuse_opt_parse(&args, &lo, lo_opts, NULL) == -1) {
+        return 1;
+    }
+
+    lo.debug = opts.debug;
+    lo.root.refcount = 2;
+    if (lo.source) {
+        struct stat stat;
+        int res;
+
+        res = lstat(lo.source, &stat);
+        if (res == -1) {
+            fuse_log(FUSE_LOG_ERR, "failed to stat source (\"%s\"): %m\n",
+                     lo.source);
+            exit(1);
+        }
+        if (!S_ISDIR(stat.st_mode)) {
+            fuse_log(FUSE_LOG_ERR, "source is not a directory\n");
+            exit(1);
+        }
+
+    } else {
+        lo.source = "/";
+    }
+    lo.root.is_symlink = false;
+    if (!lo.timeout_set) {
+        switch (lo.cache) {
+        case CACHE_NEVER:
+            lo.timeout = 0.0;
+            break;
+
+        case CACHE_NORMAL:
+            lo.timeout = 1.0;
+            break;
+
+        case CACHE_ALWAYS:
+            lo.timeout = 86400.0;
+            break;
+        }
+    } else if (lo.timeout < 0) {
+        fuse_log(FUSE_LOG_ERR, "timeout is negative (%lf)\n", lo.timeout);
+        exit(1);
+    }
+
+    lo.root.fd = open(lo.source, O_PATH);
+    if (lo.root.fd == -1) {
+        fuse_log(FUSE_LOG_ERR, "open(\"%s\", O_PATH): %m\n", lo.source);
+        exit(1);
+    }
+
+    se = fuse_session_new(&args, &lo_oper, sizeof(lo_oper), &lo);
+    if (se == NULL) {
+        goto err_out1;
+    }
+
+    if (fuse_set_signal_handlers(se) != 0) {
+        goto err_out2;
+    }
+
+    if (fuse_session_mount(se, opts.mountpoint) != 0) {
+        goto err_out3;
+    }
+
+    fuse_daemonize(opts.foreground);
+
+    /* Block until ctrl+c or fusermount -u */
+    if (opts.singlethread) {
+        ret = fuse_session_loop(se);
+    } else {
+        ret = fuse_session_loop_mt(se, opts.clone_fd);
+    }
+
+    fuse_session_unmount(se);
 err_out3:
-	fuse_remove_signal_handlers(se);
+    fuse_remove_signal_handlers(se);
 err_out2:
-	fuse_session_destroy(se);
+    fuse_session_destroy(se);
 err_out1:
-	free(opts.mountpoint);
-	fuse_opt_free_args(&args);
+    free(opts.mountpoint);
+    fuse_opt_free_args(&args);
 
-	if (lo.root.fd >= 0)
-		close(lo.root.fd);
+    if (lo.root.fd >= 0) {
+        close(lo.root.fd);
+    }
 
-	return ret ? 1 : 0;
+    return ret ? 1 : 0;
 }
