[1/3] fuse: document fuse_fsync_in.fsync_flags

Commit Message

Alan Somers April 19, 2019, 9:42 p.m. UTC

From: Alan Somers <[e-mail]>

The FUSE_FSYNC_DATASYNC flag was introduced by commit b6aeadeda22a as a
magic number.  No new values have been added to fsync_flags since.

Signed-off-by: Alan Somers <[e-mail]>
---
 fs/fuse/file.c            | 2 +-
 include/uapi/linux/fuse.h | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

Patch

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 06096b60f1df..6d8dd7035912 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -462,7 +462,7 @@  int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
 
 	memset(&inarg, 0, sizeof(inarg));
 	inarg.fh = ff->fh;
-	inarg.fsync_flags = datasync ? 1 : 0;
+	inarg.fsync_flags = datasync ? FUSE_FSYNC_FDATASYNC : 0;
 	args.in.h.opcode = opcode;
 	args.in.h.nodeid = get_node_id(inode);
 	args.in.numargs = 1;
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 2ac598614a8f..e4ceeb406eb3 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -353,6 +353,13 @@  struct fuse_file_lock {
  */
 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
 
+/**
+ * Fsync flags
+ *
+ * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
+ */
+#define FUSE_FSYNC_FDATASYNC	(1 << 0)
+
 enum fuse_opcode {
 	FUSE_LOOKUP		= 1,
 	FUSE_FORGET		= 2,  /* no reply */