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Btrfs: Handle data checksumming on bios that span multiple ordered extents

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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>
This commit is contained in:
Chris Mason 2008-07-18 06:17:13 -04:00
parent eb84ae039e
commit 3edf7d33f4
5 changed files with 69 additions and 31 deletions
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6
fs/btrfs/inode.c
View file

@ -351,12 +351,8 @@ int __btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
{
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret = 0;
struct btrfs_ordered_sum *sums;
ret = btrfs_csum_one_bio(root, bio, &sums);
BUG_ON(ret);
ret = btrfs_add_ordered_sum(inode, sums);
ret = btrfs_csum_one_bio(root, inode, bio);
BUG_ON(ret);
return btrfs_map_bio(root, rw, bio, mirror_num, 1);