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| author | Chris Mason <chris.mason@oracle.com> | 2008-07-18 14:17:13 +0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 19:04:05 +0400 |
| commit | 3edf7d33f4edb1e4a9bb0a4c0a84d95fb4d22a09 (patch) | |
| tree | 8698a6dd1d0d038f1b56f79c92783518d36f2145 /fs/btrfs/ordered-data.h | |
| parent | eb84ae039e10f1f80443d846ba1350122bbdc753 (diff) | |
| download | linux-3edf7d33f4edb1e4a9bb0a4c0a84d95fb4d22a09.tar.xz | |
Btrfs: Handle data checksumming on bios that span multiple ordered extents
Data checksumming is done right before the bio is sent down the IO stack,
which means a single bio might span more than one ordered extent. In
this case, the checksumming data is split between two ordered extents.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ordered-data.h')
| -rw-r--r-- | fs/btrfs/ordered-data.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index 98f491d1022b..1794efd13ca3 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -39,7 +39,11 @@ struct btrfs_sector_sum { struct btrfs_ordered_sum { u64 file_offset; - u64 len; + /* + * this is the length in bytes covered by the sums array below. + * But, the sums array may not be contiguous in the file. + */ + unsigned long len; struct list_head list; /* last field is a variable length array of btrfs_sector_sums */ struct btrfs_sector_sum sums; @@ -95,6 +99,7 @@ static inline int btrfs_ordered_sum_size(struct btrfs_root *root, u64 bytes) { unsigned long num_sectors = (bytes + root->sectorsize - 1) / root->sectorsize; + num_sectors++; return sizeof(struct btrfs_ordered_sum) + num_sectors * sizeof(struct btrfs_sector_sum); } @@ -114,7 +119,9 @@ int btrfs_dec_test_ordered_pending(struct inode *inode, u64 file_offset, u64 io_size); int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, u64 start, u64 len); -int btrfs_add_ordered_sum(struct inode *inode, struct btrfs_ordered_sum *sum); +int btrfs_add_ordered_sum(struct inode *inode, + struct btrfs_ordered_extent *entry, + struct btrfs_ordered_sum *sum); struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode, u64 file_offset); void btrfs_start_ordered_extent(struct inode *inode, |