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btrfs: record btrfs_device directly in btrfs_io_bio 

Instead of recording stripe_index and using that to access correct
btrfs_device from btrfs_bio::stripes record the btrfs_device in
btrfs_io_bio. This will enable endio handlers to increment device
error counters on checksum errors.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2020-07-03 11:14:27 +03:00 committed by David Sterba
parent 3526302f26
commit c31efbdf23
3 changed files with 6 additions and 11 deletions
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1
fs/btrfs/raid56.c
View File

@ -1117,6 +1117,7 @@ static int rbio_add_io_page(struct btrfs_raid_bio *rbio,
/* put a new bio on the list */
bio = btrfs_io_bio_alloc(bio_max_len >> PAGE_SHIFT ?: 1);
btrfs_io_bio(bio)->device = stripe->dev;
bio->bi_iter.bi_size = 0;
bio_set_dev(bio, stripe->dev->bdev);
bio->bi_iter.bi_sector = disk_start >> 9;

14
fs/btrfs/volumes.c
View File

@ -6261,12 +6261,8 @@ static void btrfs_end_bio(struct bio *bio)
atomic_inc(&bbio->error);
if (bio->bi_status == BLK_STS_IOERR ||
bio->bi_status == BLK_STS_TARGET) {
unsigned int stripe_index =
btrfs_io_bio(bio)->stripe_index;
struct btrfs_device *dev;
struct btrfs_device *dev = btrfs_io_bio(bio)->device;
BUG_ON(stripe_index >= bbio->num_stripes);
dev = bbio->stripes[stripe_index].dev;
if (dev->bdev) {
if (bio_op(bio) == REQ_OP_WRITE)
btrfs_dev_stat_inc_and_print(dev,
@ -6313,13 +6309,12 @@ static void btrfs_end_bio(struct bio *bio)
}
static void submit_stripe_bio(struct btrfs_bio *bbio, struct bio *bio,
u64 physical, int dev_nr)
u64 physical, struct btrfs_device *dev)
{
struct btrfs_device *dev = bbio->stripes[dev_nr].dev;
struct btrfs_fs_info *fs_info = bbio->fs_info;
bio->bi_private = bbio;
btrfs_io_bio(bio)->stripe_index = dev_nr;
btrfs_io_bio(bio)->device = dev;
bio->bi_end_io = btrfs_end_bio;
bio->bi_iter.bi_sector = physical >> 9;
btrfs_debug_in_rcu(fs_info,
@ -6420,8 +6415,7 @@ blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
else
bio = first_bio;
submit_stripe_bio(bbio, bio, bbio->stripes[dev_nr].physical,
dev_nr);
submit_stripe_bio(bbio, bio, bbio->stripes[dev_nr].physical, dev);
}
btrfs_bio_counter_dec(fs_info);
return BLK_STS_OK;

2
fs/btrfs/volumes.h
View File

@ -288,7 +288,7 @@ struct btrfs_fs_devices {
*/
struct btrfs_io_bio {
unsigned int mirror_num;
unsigned int stripe_index;
struct btrfs_device *device;
u64 logical;
u8 *csum;
u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE];