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btrfs: refactor error handling in btrfs_submit_bio

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Add a bbio local variable and to prepare for calling functions that
return a blk_status_t, rename the existing int used for error handling
so that ret can be reused for the blk_status_t, and a label that can be
reused for failing the passed in bio.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.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 2023-01-21 07:50:03 +01:00 committed by David Sterba
parent 4ae2edf12d
commit 9ba0004bd9
1 changed files with 15 additions and 9 deletions
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24
fs/btrfs/bio.c
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@ -230,20 +230,21 @@ static void btrfs_submit_mirrored_bio(struct btrfs_io_context *bioc, int dev_nr)
void btrfs_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, int mirror_num)
{
struct btrfs_bio *bbio = btrfs_bio(bio);
u64 logical = bio->bi_iter.bi_sector << 9;
u64 length = bio->bi_iter.bi_size;
u64 map_length = length;
struct btrfs_io_context *bioc = NULL;
struct btrfs_io_stripe smap;
int ret;
blk_status_t ret;
int error;
btrfs_bio_counter_inc_blocked(fs_info);
ret = __btrfs_map_block(fs_info, btrfs_op(bio), logical, &map_length,
&bioc, &smap, &mirror_num, 1);
if (ret) {
btrfs_bio_counter_dec(fs_info);
btrfs_bio_end_io(btrfs_bio(bio), errno_to_blk_status(ret));
return;
error = __btrfs_map_block(fs_info, btrfs_op(bio), logical, &map_length,
&bioc, &smap, &mirror_num, 1);
if (error) {
ret = errno_to_blk_status(error);
goto fail;
}
if (map_length < length) {
@ -255,8 +256,8 @@ void btrfs_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, int mirror
if (!bioc) {
/* Single mirror read/write fast path */
btrfs_bio(bio)->mirror_num = mirror_num;
btrfs_bio(bio)->device = smap.dev;
bbio->mirror_num = mirror_num;
bbio->device = smap.dev;
bio->bi_iter.bi_sector = smap.physical >> SECTOR_SHIFT;
bio->bi_private = fs_info;
bio->bi_end_io = btrfs_simple_end_io;
@ -278,6 +279,11 @@ void btrfs_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, int mirror
for (dev_nr = 0; dev_nr < total_devs; dev_nr++)
btrfs_submit_mirrored_bio(bioc, dev_nr);
}
return;
fail:
btrfs_bio_counter_dec(fs_info);
btrfs_bio_end_io(bbio, ret);
}
/*