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Code Issues Releases Wiki Activity

block: call submit_bio_checks under q_usage_counter

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Ensure all bios check the current values of the queue under freeze
protection, i.e. to make sure the zero capacity set by del_gendisk
is actually seen before dispatching to the driver.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210929071241.934472-2-hch@lst.de
Tested-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-09-29 09:12:37 +02:00 committed by Jens Axboe
parent baa0ab2ba2
commit cc9c884dd7
1 changed files with 12 additions and 22 deletions
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34
block/blk-core.c
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@ -899,11 +899,18 @@ static blk_qc_t __submit_bio(struct bio *bio)
struct gendisk *disk = bio->bi_bdev->bd_disk; struct gendisk *disk = bio->bi_bdev->bd_disk;
blk_qc_t ret = BLK_QC_T_NONE; blk_qc_t ret = BLK_QC_T_NONE;
if (blk_crypto_bio_prep(&bio)) { if (unlikely(bio_queue_enter(bio) != 0))
if (!disk->fops->submit_bio) return BLK_QC_T_NONE;
return blk_mq_submit_bio(bio);
if (!submit_bio_checks(bio) || !blk_crypto_bio_prep(&bio))
goto queue_exit;
if (disk->fops->submit_bio) {
ret = disk->fops->submit_bio(bio); ret = disk->fops->submit_bio(bio);
goto queue_exit;
} }
return blk_mq_submit_bio(bio);
queue_exit:
blk_queue_exit(disk->queue); blk_queue_exit(disk->queue);
return ret; return ret;
} }
@ -941,9 +948,6 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio)
struct request_queue *q = bio->bi_bdev->bd_disk->queue; struct request_queue *q = bio->bi_bdev->bd_disk->queue;
struct bio_list lower, same; struct bio_list lower, same;
if (unlikely(bio_queue_enter(bio) != 0))
continue;
/* /*
* Create a fresh bio_list for all subordinate requests. * Create a fresh bio_list for all subordinate requests.
*/ */
@ -979,23 +983,12 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio)
static blk_qc_t __submit_bio_noacct_mq(struct bio *bio) static blk_qc_t __submit_bio_noacct_mq(struct bio *bio)
{ {
struct bio_list bio_list[2] = { }; struct bio_list bio_list[2] = { };
blk_qc_t ret = BLK_QC_T_NONE; blk_qc_t ret;
current->bio_list = bio_list; current->bio_list = bio_list;
do { do {
struct gendisk *disk = bio->bi_bdev->bd_disk; ret = __submit_bio(bio);
if (unlikely(bio_queue_enter(bio) != 0))
continue;
if (!blk_crypto_bio_prep(&bio)) {
blk_queue_exit(disk->queue);
ret = BLK_QC_T_NONE;
continue;
}
ret = blk_mq_submit_bio(bio);
} while ((bio = bio_list_pop(&bio_list[0]))); } while ((bio = bio_list_pop(&bio_list[0])));
current->bio_list = NULL; current->bio_list = NULL;
@ -1013,9 +1006,6 @@ static blk_qc_t __submit_bio_noacct_mq(struct bio *bio)
*/ */
blk_qc_t submit_bio_noacct(struct bio *bio) blk_qc_t submit_bio_noacct(struct bio *bio)
{ {
if (!submit_bio_checks(bio))
return BLK_QC_T_NONE;
/* /*
* We only want one ->submit_bio to be active at a time, else stack * We only want one ->submit_bio to be active at a time, else stack
* usage with stacked devices could be a problem. Use current->bio_list * usage with stacked devices could be a problem. Use current->bio_list