diff options
| author | Chris Mason <chris.mason@oracle.com> | 2007-12-21 16:27:23 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:58 -0400 |
| commit | 5d4fb734b4cb89a3902d6de309af0f6f3e63fe73 (patch) | |
| tree | 0ceeb3fb26c6d8b49c0ba902f24e94e37f58f52c /fs/btrfs/extent_map.c | |
| parent | 1832a6d5ee3b1af61001cadba9e10da9e91af4a4 (diff) | |
| download | lwn-5d4fb734b4cb89a3902d6de309af0f6f3e63fe73.tar.gz lwn-5d4fb734b4cb89a3902d6de309af0f6f3e63fe73.zip | |
Btrfs: Fix an off by one in the extent_map prepare write code
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_map.c')
| -rw-r--r-- | fs/btrfs/extent_map.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 2b92f1070274..f53d8c976219 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -2270,7 +2270,7 @@ int extent_prepare_write(struct extent_map_tree *tree, kunmap_atomic(kaddr, KM_USER0); } if ((em->block_start != EXTENT_MAP_HOLE && - em->block_start != EXTENT_MAP_INLINE) && + em->block_start != EXTENT_MAP_INLINE) && !isnew && !PageUptodate(page) && (block_off_end > to || block_off_start < from) && !test_range_bit(tree, block_start, cur_end, @@ -2279,7 +2279,7 @@ int extent_prepare_write(struct extent_map_tree *tree, u64 extent_offset = block_start - em->start; size_t iosize; sector = (em->block_start + extent_offset) >> 9; - iosize = (cur_end - block_start + blocksize - 1) & + iosize = (cur_end - block_start + blocksize) & ~((u64)blocksize - 1); /* * we've already got the extent locked, but we |