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blk-cgroup: pass a gendisk to blkcg_init_queue and blkcg_exit_queue 

[ Upstream commit 9823538fb7 ]

Pass the gendisk to blkcg_init_disk and blkcg_exit_disk as part of moving
the blk-cgroup infrastructure to be gendisk based.  Also remove the
rather pointless kerneldoc comments for these internal functions with a
single caller each.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andreas Herrmann <aherrmann@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220921180501.1539876-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 813e693023 ("blk-iolatency: Fix memory leak on add_disk() failures")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christoph Hellwig 2022-09-21 20:04:50 +02:00 committed by Greg Kroah-Hartman
parent c18fcd3ff1
commit 3f3307127c
3 changed files with 12 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
block/blk-cgroup.c
View File

@ -1246,18 +1246,9 @@ static int blkcg_css_online(struct cgroup_subsys_state *css)
return 0;
}
/**
* blkcg_init_queue - initialize blkcg part of request queue
* @q: request_queue to initialize
*
* Called from blk_alloc_queue(). Responsible for initializing blkcg
* part of new request_queue @q.
*
* RETURNS:
* 0 on success, -errno on failure.
*/
int blkcg_init_queue(struct request_queue *q)
int blkcg_init_disk(struct gendisk *disk)
{
struct request_queue *q = disk->queue;
struct blkcg_gq *new_blkg, *blkg;
bool preloaded;
int ret;
@ -1310,16 +1301,10 @@ err_unlock:
return PTR_ERR(blkg);
}
/**
* blkcg_exit_queue - exit and release blkcg part of request_queue
* @q: request_queue being released
*
* Called from blk_exit_queue(). Responsible for exiting blkcg part.
*/
void blkcg_exit_queue(struct request_queue *q)
void blkcg_exit_disk(struct gendisk *disk)
{
blkg_destroy_all(q);
blk_throtl_exit(q);
blkg_destroy_all(disk->queue);
blk_throtl_exit(disk->queue);
}
static void blkcg_bind(struct cgroup_subsys_state *root_css)

8
block/blk-cgroup.h
View File

@ -178,8 +178,8 @@ struct blkcg_policy {
extern struct blkcg blkcg_root;
extern bool blkcg_debug_stats;
int blkcg_init_queue(struct request_queue *q);
void blkcg_exit_queue(struct request_queue *q);
int blkcg_init_disk(struct gendisk *disk);
void blkcg_exit_disk(struct gendisk *disk);
/* Blkio controller policy registration */
int blkcg_policy_register(struct blkcg_policy *pol);
@ -481,8 +481,8 @@ struct blkcg {
};
static inline struct blkcg_gq *blkg_lookup(struct blkcg *blkcg, void *key) { return NULL; }
static inline int blkcg_init_queue(struct request_queue *q) { return 0; }
static inline void blkcg_exit_queue(struct request_queue *q) { }
static inline int blkcg_init_disk(struct gendisk *disk) { return 0; }
static inline void blkcg_exit_disk(struct gendisk *disk) { }
static inline int blkcg_policy_register(struct blkcg_policy *pol) { return 0; }
static inline void blkcg_policy_unregister(struct blkcg_policy *pol) { }
static inline int blkcg_activate_policy(struct request_queue *q,

5
block/genhd.c
View File

@ -1154,7 +1154,8 @@ static void disk_release(struct device *dev)
!test_bit(GD_ADDED, &disk->state))
blk_mq_exit_queue(disk->queue);
blkcg_exit_queue(disk->queue);
blkcg_exit_disk(disk);
bioset_exit(&disk->bio_split);
disk_release_events(disk);
@ -1367,7 +1368,7 @@ struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id,
if (xa_insert(&disk->part_tbl, 0, disk->part0, GFP_KERNEL))
goto out_destroy_part_tbl;
if (blkcg_init_queue(q))
if (blkcg_init_disk(disk))
goto out_erase_part0;
rand_initialize_disk(disk);