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btrfs: don't call btrfs_page_set_checked in finish_compressed_bio_read 

This flag was used to communicate that the low-level compression code
already did verify the checksum to the high-level I/O completion code.

But it has been unused for a long time as the upper btrfs_bio for the
decompressed data had a NULL csum pointer basically since that pointer
existed and the code already checks for that a little later.

Note that this does not affect the other use of the checked flag, which
is only used for the COW fixup worker.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2022-07-07 07:33:31 +02:00 committed by David Sterba
parent 81bd9328ab
commit 0b078d9db8
2 changed files with 2 additions and 27 deletions
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24
fs/btrfs/compression.c
View File

@ -152,29 +152,9 @@ static void finish_compressed_bio_read(struct compressed_bio *cb)
}
/* Do io completion on the original bio */
if (cb->status != BLK_STS_OK) {
if (cb->status != BLK_STS_OK)
cb->orig_bio->bi_status = cb->status;
bio_endio(cb->orig_bio);
} else {
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
/*
* We have verified the checksum already, set page checked so
* the end_io handlers know about it
*/
ASSERT(!bio_flagged(cb->orig_bio, BIO_CLONED));
bio_for_each_segment_all(bvec, cb->orig_bio, iter_all) {
u64 bvec_start = page_offset(bvec->bv_page) +
bvec->bv_offset;
btrfs_page_set_checked(btrfs_sb(cb->inode->i_sb),
bvec->bv_page, bvec_start,
bvec->bv_len);
}
bio_endio(cb->orig_bio);
}
bio_endio(cb->orig_bio);
/* Finally free the cb struct */
kfree(cb->compressed_pages);

5
fs/btrfs/inode.c
View File

@ -3504,11 +3504,6 @@ unsigned int btrfs_verify_data_csum(struct btrfs_bio *bbio,
u32 pg_off;
unsigned int result = 0;
if (btrfs_page_test_checked(fs_info, page, start, end + 1 - start)) {
btrfs_page_clear_checked(fs_info, page, start, end + 1 - start);
return 0;
}
/*
* This only happens for NODATASUM or compressed read.
* Normally this should be covered by above check for compressed read