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| author | Miklos Szeredi <mszeredi@suse.cz> | 2008-05-12 14:02:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-13 08:02:26 -0700 |
| commit | 78bb6cb9a890d3d50ca3b02fce9223d3e734ab9b (patch) | |
| tree | 330cc4fd17af9176ae9e2ee833e1097638fd1b30 /fs/fuse/file.c | |
| parent | 0f146a764ff08c4c210c04239c5e6784b4b77485 (diff) | |
| download | op-kernel-dev-78bb6cb9a890d3d50ca3b02fce9223d3e734ab9b.zip op-kernel-dev-78bb6cb9a890d3d50ca3b02fce9223d3e734ab9b.tar.gz | |
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 'fs/fuse/file.c')
| -rw-r--r-- | fs/fuse/file.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index f28cf8b..8092f0d 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -804,6 +804,8 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req, if (offset == PAGE_CACHE_SIZE) offset = 0; + if (!fc->big_writes) + break; } while (iov_iter_count(ii) && count < fc->max_write && req->num_pages < FUSE_MAX_PAGES_PER_REQ && offset == 0); |
