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Btrfs: Fix logic to avoid reading checksums for -o nodatasum,compress 

When compression was on, we were improperly ignoring -o nodatasum.  This
reworks the logic a bit to properly honor all the flags.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-10-30 14:23:13 -04:00
parent cfbc246eaa
commit 19b9bdb054
1 changed files with 11 additions and 10 deletions
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21
fs/btrfs/inode.c
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@ -833,28 +833,29 @@ int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
{
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret = 0;
int skip_sum;
ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
BUG_ON(ret);
if (btrfs_test_opt(root, NODATASUM) ||
btrfs_test_flag(inode, NODATASUM)) {
goto mapit;
}
skip_sum = btrfs_test_opt(root, NODATASUM) ||
btrfs_test_flag(inode, NODATASUM);
if (!(rw & (1 << BIO_RW))) {
btrfs_lookup_bio_sums(root, inode, bio);
if (!skip_sum)
btrfs_lookup_bio_sums(root, inode, bio);
if (bio_flags & EXTENT_BIO_COMPRESSED) {
if (bio_flags & EXTENT_BIO_COMPRESSED)
return btrfs_submit_compressed_read(inode, bio,
mirror_num, bio_flags);
}
goto mapit;
}
return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info,
} else if (!skip_sum) {
/* we're doing a write, do the async checksumming */
return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info,
inode, rw, bio, mirror_num,
bio_flags, __btrfs_submit_bio_hook);
}
mapit:
return btrfs_map_bio(root, rw, bio, mirror_num, 0);
}