[PATCH] FUSE: add fsync operation for directories

This patch adds a new FSYNCDIR request, which is sent when fsync is called
on directories.  This operation is available in libfuse 2.3-pre1 or
greater.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/fuse.h

@@ -99,7 +99,8 @@ enum fuse_opcode {
 	FUSE_INIT          = 26,
 	FUSE_OPENDIR       = 27,
 	FUSE_READDIR       = 28,
-	FUSE_RELEASEDIR    = 29
+	FUSE_RELEASEDIR    = 29,
+	FUSE_FSYNCDIR      = 30
 };
 
 /* Conservative buffer size for the client */