From 78bb6cb9a890d3d50ca3b02fce9223d3e734ab9b Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Mon, 12 May 2008 14:02:32 -0700 Subject: fuse: add flag to turn on big writes Prior to 2.6.26 fuse only supported single page write requests. In theory all fuse filesystem should be able support bigger than 4k writes, as there's nothing in the API to prevent it. Unfortunately there's a known case in NTFS-3G where big writes cause filesystem corruption. There could also be other filesystems, where the lack of testing with big write requests would result in bugs. To prevent such problems on a kernel upgrade, disable big writes by default, but let filesystems set a flag to turn it on. Signed-off-by: Miklos Szeredi Cc: Szabolcs Szakacsits Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/fuse.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/fuse.h b/include/linux/fuse.h index 5c86f1196c3a..d48282197696 100644 --- a/include/linux/fuse.h +++ b/include/linux/fuse.h @@ -109,6 +109,7 @@ struct fuse_file_lock { #define FUSE_POSIX_LOCKS (1 << 1) #define FUSE_FILE_OPS (1 << 2) #define FUSE_ATOMIC_O_TRUNC (1 << 3) +#define FUSE_BIG_WRITES (1 << 5) /** * Release flags -- cgit v1.2.2