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authorMiklos Szeredi <mszeredi@suse.cz>2008-05-12 14:02:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-13 08:02:26 -0700
commit78bb6cb9a890d3d50ca3b02fce9223d3e734ab9b (patch)
tree330cc4fd17af9176ae9e2ee833e1097638fd1b30 /include/linux
parent0f146a764ff08c4c210c04239c5e6784b4b77485 (diff)
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 <mszeredi@suse.cz> Cc: Szabolcs Szakacsits <szaka@ntfs-3g.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/fuse.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index 5c86f1196c3..d4828219769 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