diff options
| author | Peng Tao <bergwolf@gmail.com> | 2012-08-23 12:27:51 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-10-01 18:38:24 -0400 |
| commit | fe6e1e8d9fad86873eb74a26e80a8f91f9e870b5 (patch) | |
| tree | d09ce2464d48894ec12d39571d79e1176b493cfb /fs/nfs/blocklayout/blocklayout.h | |
| parent | 5d0e3a004f02bffab51f542fa1d5b2e2854d8545 (diff) | |
pnfsblock: fix partial page buffer wirte
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.
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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 03350690118e..39bb51a8dd18 100644 --- a/fs/nfs/blocklayout/blocklayout.h +++ b/fs/nfs/blocklayout/blocklayout.h | |||
| @@ -41,6 +41,7 @@ | |||
| 41 | 41 | ||
| 42 | #define PAGE_CACHE_SECTORS (PAGE_CACHE_SIZE >> SECTOR_SHIFT) | 42 | #define PAGE_CACHE_SECTORS (PAGE_CACHE_SIZE >> SECTOR_SHIFT) |
| 43 | #define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT) | 43 | #define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT) |
| 44 | #define SECTOR_SIZE (1 << SECTOR_SHIFT) | ||
| 44 | 45 | ||
| 45 | struct block_mount_id { | 46 | struct block_mount_id { |
| 46 | spinlock_t bm_lock; /* protects list */ | 47 | spinlock_t bm_lock; /* protects list */ |