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btrfs: move more work into btrfs_end_bioc 

Assign ->mirror_num and ->bi_status in btrfs_end_bioc instead of
duplicating the logic in the callers.  Also remove the bio argument as
it always must be bioc->orig_bio and the now pointless bioc_error that
did nothing but assign bi_sector to the same value just sampled in the
caller.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2022-05-26 09:36:33 +02:00 committed by David Sterba
parent d681559280
commit b4c46bdea9
1 changed files with 22 additions and 50 deletions
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72
fs/btrfs/volumes.c
View File

@ -6616,19 +6616,29 @@ int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
return __btrfs_map_block(fs_info, op, logical, length, bioc_ret, 0, 1);
}
static inline void btrfs_end_bioc(struct btrfs_io_context *bioc, struct bio *bio)
static inline void btrfs_end_bioc(struct btrfs_io_context *bioc)
{
bio->bi_private = bioc->private;
bio->bi_end_io = bioc->end_io;
bio_endio(bio);
struct bio *orig_bio = bioc->orig_bio;
btrfs_bio(orig_bio)->mirror_num = bioc->mirror_num;
orig_bio->bi_private = bioc->private;
orig_bio->bi_end_io = bioc->end_io;
/*
* Only send an error to the higher layers if it is beyond the tolerance
* threshold.
*/
if (atomic_read(&bioc->error) > bioc->max_errors)
orig_bio->bi_status = BLK_STS_IOERR;
else
orig_bio->bi_status = BLK_STS_OK;
bio_endio(orig_bio);
btrfs_put_bioc(bioc);
}
static void btrfs_end_bio(struct bio *bio)
{
struct btrfs_io_context *bioc = bio->bi_private;
int is_orig_bio = 0;
if (bio->bi_status) {
atomic_inc(&bioc->error);
@ -6649,35 +6659,12 @@ static void btrfs_end_bio(struct bio *bio)
}
}
if (bio == bioc->orig_bio)
is_orig_bio = 1;
if (bio != bioc->orig_bio)
bio_put(bio);
btrfs_bio_counter_dec(bioc->fs_info);
if (atomic_dec_and_test(&bioc->stripes_pending)) {
if (!is_orig_bio) {
bio_put(bio);
bio = bioc->orig_bio;
}
btrfs_bio(bio)->mirror_num = bioc->mirror_num;
/* only send an error to the higher layers if it is
* beyond the tolerance of the btrfs bio
*/
if (atomic_read(&bioc->error) > bioc->max_errors) {
bio->bi_status = BLK_STS_IOERR;
} else {
/*
* this bio is actually up to date, we didn't
* go over the max number of errors
*/
bio->bi_status = BLK_STS_OK;
}
btrfs_end_bioc(bioc, bio);
} else if (!is_orig_bio) {
bio_put(bio);
}
if (atomic_dec_and_test(&bioc->stripes_pending))
btrfs_end_bioc(bioc);
}
static void submit_stripe_bio(struct btrfs_io_context *bioc, struct bio *bio,
@ -6715,23 +6702,6 @@ static void submit_stripe_bio(struct btrfs_io_context *bioc, struct bio *bio,
submit_bio(bio);
}
static void bioc_error(struct btrfs_io_context *bioc, struct bio *bio, u64 logical)
{
atomic_inc(&bioc->error);
if (atomic_dec_and_test(&bioc->stripes_pending)) {
/* Should be the original bio. */
WARN_ON(bio != bioc->orig_bio);
btrfs_bio(bio)->mirror_num = bioc->mirror_num;
bio->bi_iter.bi_sector = logical >> 9;
if (atomic_read(&bioc->error) > bioc->max_errors)
bio->bi_status = BLK_STS_IOERR;
else
bio->bi_status = BLK_STS_OK;
btrfs_end_bioc(bioc, bio);
}
}
blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
int mirror_num)
{
@ -6790,7 +6760,9 @@ blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
&dev->dev_state) ||
(btrfs_op(first_bio) == BTRFS_MAP_WRITE &&
!test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state))) {
bioc_error(bioc, first_bio, logical);
atomic_inc(&bioc->error);
if (atomic_dec_and_test(&bioc->stripes_pending))
btrfs_end_bioc(bioc);
continue;
}