tree 330cc4fd17af9176ae9e2ee833e1097638fd1b30
parent 0f146a764ff08c4c210c04239c5e6784b4b77485
author Miklos Szeredi <mszeredi@suse.cz> 1210626152 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1210690946 -0700

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>