diff options
| author | Peng Tao <bergwolf@gmail.com> | 2012-08-24 00:27:51 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:32:37 -0700 |
| commit | fda45cc12ebb7060131111442844f977555e3b9b (patch) | |
| tree | fa7d69db5ff24127bac1db43af18f74e1c131e13 /fs/nfs/blocklayout/blocklayout.h | |
| parent | e99bc7155de4a2598f853001720228d728d5ad1f (diff) | |
pnfsblock: fix partial page buffer wirte
commit fe6e1e8d9fad86873eb74a26e80a8f91f9e870b5 upstream.
If applications use flock to protect its write range, generic NFS
will not do read-modify-write cycle at page cache level. Therefore
LD should know how to handle non-sector aligned writes. Otherwise
there will be data corruption.
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/nfs/blocklayout/blocklayout.h')
| -rw-r--r-- | fs/nfs/blocklayout/blocklayout.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h index 03350690118..39bb51a8dd1 100644 --- a/fs/nfs/blocklayout/blocklayout.h +++ b/fs/nfs/blocklayout/blocklayout.h @@ -41,6 +41,7 @@ #define PAGE_CACHE_SECTORS (PAGE_CACHE_SIZE >> SECTOR_SHIFT) #define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT) +#define SECTOR_SIZE (1 << SECTOR_SHIFT) struct block_mount_id { spinlock_t bm_lock; /* protects list */ |