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Merge tag 'md-next-20230623' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into for-6.5/block-late 

Pull MD fixes from Song.

* tag 'md-next-20230623' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  raid10: avoid spin_lock from fastpath from raid10_unplug()
  md: fix 'delete_mutex' deadlock
  md: use mddev->external to select holder in export_rdev()
  md/raid1-10: fix casting from randomized structure in raid1_submit_write()
  md/raid10: fix the condition to call bio_end_io_acct()
This commit is contained in:
Jens Axboe 2023-06-23 11:59:05 -06:00
parent fcaa174a9c a8d5fdd4d2
commit c36591f682
4 changed files with 16 additions and 28 deletions
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32
drivers/md/md.c
View File

@ -643,7 +643,6 @@ void mddev_init(struct mddev *mddev)
{
mutex_init(&mddev->open_mutex);
mutex_init(&mddev->reconfig_mutex);
mutex_init(&mddev->delete_mutex);
mutex_init(&mddev->bitmap_info.mutex);
INIT_LIST_HEAD(&mddev->disks);
INIT_LIST_HEAD(&mddev->all_mddevs);
@ -749,26 +748,15 @@ static void mddev_free(struct mddev *mddev)
static const struct attribute_group md_redundancy_group;
static void md_free_rdev(struct mddev *mddev)
void mddev_unlock(struct mddev *mddev)
{
struct md_rdev *rdev;
struct md_rdev *tmp;
LIST_HEAD(delete);
mutex_lock(&mddev->delete_mutex);
if (list_empty(&mddev->deleting))
goto out;
if (!list_empty(&mddev->deleting))
list_splice_init(&mddev->deleting, &delete);
list_for_each_entry_safe(rdev, tmp, &mddev->deleting, same_set) {
list_del_init(&rdev->same_set);
kobject_del(&rdev->kobj);
export_rdev(rdev, mddev);
}
out:
mutex_unlock(&mddev->delete_mutex);
}
void mddev_unlock(struct mddev *mddev)
{
if (mddev->to_remove) {
/* These cannot be removed under reconfig_mutex as
* an access to the files will try to take reconfig_mutex
@ -808,7 +796,11 @@ void mddev_unlock(struct mddev *mddev)
} else
mutex_unlock(&mddev->reconfig_mutex);
md_free_rdev(mddev);
list_for_each_entry_safe(rdev, tmp, &delete, same_set) {
list_del_init(&rdev->same_set);
kobject_del(&rdev->kobj);
export_rdev(rdev, mddev);
}
md_wakeup_thread(mddev->thread);
wake_up(&mddev->sb_wait);
@ -2458,7 +2450,7 @@ static void export_rdev(struct md_rdev *rdev, struct mddev *mddev)
if (test_bit(AutoDetected, &rdev->flags))
md_autodetect_dev(rdev->bdev->bd_dev);
#endif
blkdev_put(rdev->bdev, mddev->major_version == -2 ? &claim_rdev : rdev);
blkdev_put(rdev->bdev, mddev->external ? &claim_rdev : rdev);
rdev->bdev = NULL;
kobject_put(&rdev->kobj);
}
@ -2488,9 +2480,7 @@ static void md_kick_rdev_from_array(struct md_rdev *rdev)
* reconfig_mutex is held, hence it can't be called under
* reconfig_mutex and it's delayed to mddev_unlock().
*/
mutex_lock(&mddev->delete_mutex);
list_add(&rdev->same_set, &mddev->deleting);
mutex_unlock(&mddev->delete_mutex);
}
static void export_array(struct mddev *mddev)
@ -6140,7 +6130,7 @@ static void md_clean(struct mddev *mddev)
mddev->resync_min = 0;
mddev->resync_max = MaxSector;
mddev->reshape_position = MaxSector;
mddev->external = 0;
/* we still need mddev->external in export_rdev, do not clear it yet */
mddev->persistent = 0;
mddev->level = LEVEL_NONE;
mddev->clevel[0] = 0;

4
drivers/md/md.h
View File

@ -531,11 +531,9 @@ struct mddev {
/*
* Temporarily store rdev that will be finally removed when
* reconfig_mutex is unlocked.
* reconfig_mutex is unlocked, protected by reconfig_mutex.
*/
struct list_head deleting;
/* Protect the deleting list */
struct mutex delete_mutex;
bool has_superblocks:1;
bool fail_last_dev:1;

2
drivers/md/raid1-10.c
View File

@ -116,7 +116,7 @@ static void md_bio_reset_resync_pages(struct bio *bio, struct resync_pages *rp,
static inline void raid1_submit_write(struct bio *bio)
{
struct md_rdev *rdev = (struct md_rdev *)bio->bi_bdev;
struct md_rdev *rdev = (void *)bio->bi_bdev;
bio->bi_next = NULL;
bio_set_dev(bio, rdev->bdev);

6
drivers/md/raid10.c
View File

@ -325,7 +325,7 @@ static void raid_end_bio_io(struct r10bio *r10_bio)
if (!test_bit(R10BIO_Uptodate, &r10_bio->state))
bio->bi_status = BLK_STS_IOERR;
if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
if (r10_bio->start_time)
bio_end_io_acct(bio, r10_bio->start_time);
bio_endio(bio);
/*
@ -1118,7 +1118,7 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
spin_lock_irq(&conf->device_lock);
bio_list_merge(&conf->pending_bio_list, &plug->pending);
spin_unlock_irq(&conf->device_lock);
wake_up(&conf->wait_barrier);
wake_up_barrier(conf);
md_wakeup_thread(mddev->thread);
kfree(plug);
return;
@ -1127,7 +1127,7 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
/* we aren't scheduling, so we can do the write-out directly. */
bio = bio_list_get(&plug->pending);
raid1_prepare_flush_writes(mddev->bitmap);
wake_up(&conf->wait_barrier);
wake_up_barrier(conf);
while (bio) { /* submit pending writes */
struct bio *next = bio->bi_next;