@@ -352,6 +352,14 @@ struct fuse_file_info {
*/
#define FUSE_CAP_NO_OPENDIR_SUPPORT (1 << 24)
+/**
+ * Indicates that the client will provide fuse_attr.flags, and the kernel will
+ * interpret it.
+ *
+ * This feature is enabled by default when supported by the kernel.
+ */
+#define FUSE_CAP_ATTR_FLAGS (1 << 27)
+
/**
* Ioctl flags
*
@@ -1988,6 +1988,9 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
bufsize = max_bufsize;
}
}
+ if (arg->flags & FUSE_ATTR_FLAGS) {
+ se->conn.capable |= FUSE_CAP_ATTR_FLAGS;
+ }
#ifdef HAVE_SPLICE
#ifdef HAVE_VMSPLICE
se->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
@@ -2014,6 +2017,7 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
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(1, FUSE_CAP_ATTR_FLAGS);
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);
@@ -2103,6 +2107,9 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
if (se->conn.want & FUSE_CAP_POSIX_ACL) {
outarg.flags |= FUSE_POSIX_ACL;
}
+ if (se->conn.want & FUSE_CAP_ATTR_FLAGS) {
+ outarg.flags |= FUSE_ATTR_FLAGS;
+ }
outarg.max_readahead = se->conn.max_readahead;
outarg.max_write = se->conn.max_write;
if (se->conn.max_background >= (1 << 16)) {
The fuse_attr.flags field is currently just initialized to 0, which is valid. Thus, there is no reason not to always announce FUSE_ATTR_FLAGS (when the kernel supports it). Signed-off-by: Max Reitz <mreitz@redhat.com> --- tools/virtiofsd/fuse_common.h | 8 ++++++++ tools/virtiofsd/fuse_lowlevel.c | 7 +++++++ 2 files changed, 15 insertions(+)