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| author | Peng Tao <bergwolf@gmail.com> | 2012-08-23 16:27:51 (GMT) |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-10-01 22:38:24 (GMT) |
| commit | fe6e1e8d9fad86873eb74a26e80a8f91f9e870b5 (patch) | |
| tree | d09ce2464d48894ec12d39571d79e1176b493cfb /fs/nfs/blocklayout/blocklayout.h | |
| parent | 5d0e3a004f02bffab51f542fa1d5b2e2854d8545 (diff) | |
| download | linux-fe6e1e8d9fad86873eb74a26e80a8f91f9e870b5.tar.xz | |
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 0335069..39bb51a 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 */ |