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blk-mq: cleanup disk sysfs registration 

Pass a gendisk to the sysfs register/unregister functions and give
them descriptive names.  Also move the unregistration helper next
to the one doing the registration.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220628171850.1313069-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-06-28 19:18:50 +02:00 committed by Jens Axboe
parent eaa870f975
commit 8682b92e5a
4 changed files with 26 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
block/blk-mq-sysfs.c
View File

@ -203,22 +203,6 @@ static int blk_mq_register_hctx(struct blk_mq_hw_ctx *hctx)
return ret;
}
void blk_mq_unregister_dev(struct device *dev, struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;
unsigned long i;
lockdep_assert_held(&q->sysfs_dir_lock);
queue_for_each_hw_ctx(q, hctx, i)
blk_mq_unregister_hctx(hctx);
kobject_uevent(q->mq_kobj, KOBJ_REMOVE);
kobject_del(q->mq_kobj);
q->mq_sysfs_init_done = false;
}
void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx)
{
kobject_init(&hctx->kobj, &blk_mq_hw_ktype);
@ -251,16 +235,16 @@ void blk_mq_sysfs_init(struct request_queue *q)
}
}
int __blk_mq_register_dev(struct device *dev, struct request_queue *q)
int blk_mq_sysfs_register(struct gendisk *disk)
{
struct request_queue *q = disk->queue;
struct blk_mq_hw_ctx *hctx;
unsigned long i, j;
int ret;
WARN_ON_ONCE(!q->kobj.parent);
lockdep_assert_held(&q->sysfs_dir_lock);
ret = kobject_add(q->mq_kobj, &dev->kobj, "%s", "mq");
ret = kobject_add(q->mq_kobj, &disk_to_dev(disk)->kobj, "mq");
if (ret < 0)
goto out;
@ -288,6 +272,23 @@ unreg:
return ret;
}
void blk_mq_sysfs_unregister(struct gendisk *disk)
{
struct request_queue *q = disk->queue;
struct blk_mq_hw_ctx *hctx;
unsigned long i;
lockdep_assert_held(&q->sysfs_dir_lock);
queue_for_each_hw_ctx(q, hctx, i)
blk_mq_unregister_hctx(hctx);
kobject_uevent(q->mq_kobj, KOBJ_REMOVE);
kobject_del(q->mq_kobj);
q->mq_sysfs_init_done = false;
}
void blk_mq_sysfs_unregister_hctxs(struct request_queue *q)
{
struct blk_mq_hw_ctx *hctx;

3
block/blk-mq.h
View File

@ -118,7 +118,8 @@ static inline struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q,
*/
extern void blk_mq_sysfs_init(struct request_queue *q);
extern void blk_mq_sysfs_deinit(struct request_queue *q);
extern int __blk_mq_register_dev(struct device *dev, struct request_queue *q);
int blk_mq_sysfs_register(struct gendisk *disk);
void blk_mq_sysfs_unregister(struct gendisk *disk);
int blk_mq_sysfs_register_hctxs(struct request_queue *q);
void blk_mq_sysfs_unregister_hctxs(struct request_queue *q);
extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx);

9
block/blk-sysfs.c
View File

@ -812,18 +812,17 @@ struct kobj_type blk_queue_ktype = {
*/
int blk_register_queue(struct gendisk *disk)
{
int ret;
struct device *dev = disk_to_dev(disk);
struct request_queue *q = disk->queue;
int ret;
mutex_lock(&q->sysfs_dir_lock);
ret = kobject_add(&q->kobj, &dev->kobj, "%s", "queue");
ret = kobject_add(&q->kobj, &disk_to_dev(disk)->kobj, "queue");
if (ret < 0)
goto unlock;
if (queue_is_mq(q))
__blk_mq_register_dev(dev, q);
blk_mq_sysfs_register(disk);
mutex_lock(&q->sysfs_lock);
mutex_lock(&q->debugfs_mutex);
@ -919,7 +918,7 @@ void blk_unregister_queue(struct gendisk *disk)
* structures that can be modified through sysfs.
*/
if (queue_is_mq(q))
blk_mq_unregister_dev(disk_to_dev(disk), q);
blk_mq_sysfs_unregister(disk);
blk_crypto_sysfs_unregister(q);
mutex_lock(&q->sysfs_lock);

1
include/linux/blk-mq.h
View File

@ -691,7 +691,6 @@ struct gendisk *blk_mq_alloc_disk_for_queue(struct request_queue *q,
struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *);
int blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
struct request_queue *q);
void blk_mq_unregister_dev(struct device *, struct request_queue *);
void blk_mq_destroy_queue(struct request_queue *);
int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set);