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blk-cgroup: pass a gendisk to blkcg_{de,}activate_policy

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Prepare for storing the blkcg information in the gendisk instead of
the request_queue.

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/20230203150400.3199230-17-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-02-03 16:03:57 +01:00 committed by Jens Axboe
parent ba91c849fa
commit 40e4996ec0
8 changed files with 25 additions and 25 deletions
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2
block/bfq-cgroup.c
View File

@ -1291,7 +1291,7 @@ struct bfq_group *bfq_create_group_hierarchy(struct bfq_data *bfqd, int node)
{
int ret;
ret = blkcg_activate_policy(bfqd->queue, &blkcg_policy_bfq);
ret = blkcg_activate_policy(bfqd->queue->disk, &blkcg_policy_bfq);
if (ret)
return NULL;

2
block/bfq-iosched.c
View File

@ -7146,7 +7146,7 @@ static void bfq_exit_queue(struct elevator_queue *e)
bfqg_and_blkg_put(bfqd->root_group);
#ifdef CONFIG_BFQ_GROUP_IOSCHED
blkcg_deactivate_policy(bfqd->queue, &blkcg_policy_bfq);
blkcg_deactivate_policy(bfqd->queue->disk, &blkcg_policy_bfq);
#else
spin_lock_irq(&bfqd->lock);
bfq_put_async_queues(bfqd, bfqd->root_group);

21
block/blk-cgroup.c
View File

@ -1390,14 +1390,14 @@ struct cgroup_subsys io_cgrp_subsys = {
EXPORT_SYMBOL_GPL(io_cgrp_subsys);
/**
* blkcg_activate_policy - activate a blkcg policy on a request_queue
* @q: request_queue of interest
* blkcg_activate_policy - activate a blkcg policy on a gendisk
* @disk: gendisk of interest
* @pol: blkcg policy to activate
*
* Activate @pol on @q. Requires %GFP_KERNEL context. @q goes through
* Activate @pol on @disk. Requires %GFP_KERNEL context. @disk goes through
* bypass mode to populate its blkgs with policy_data for @pol.
*
* Activation happens with @q bypassed, so nobody would be accessing blkgs
* Activation happens with @disk bypassed, so nobody would be accessing blkgs
* from IO path. Update of each blkg is protected by both queue and blkcg
* locks so that holding either lock and testing blkcg_policy_enabled() is
* always enough for dereferencing policy data.
@ -1405,9 +1405,9 @@ EXPORT_SYMBOL_GPL(io_cgrp_subsys);
* The caller is responsible for synchronizing [de]activations and policy
* [un]registerations. Returns 0 on success, -errno on failure.
*/
int blkcg_activate_policy(struct request_queue *q,
const struct blkcg_policy *pol)
int blkcg_activate_policy(struct gendisk *disk, const struct blkcg_policy *pol)
{
struct request_queue *q = disk->queue;
struct blkg_policy_data *pd_prealloc = NULL;
struct blkcg_gq *blkg, *pinned_blkg = NULL;
int ret;
@ -1508,16 +1508,17 @@ int blkcg_activate_policy(struct request_queue *q,
EXPORT_SYMBOL_GPL(blkcg_activate_policy);
/**
* blkcg_deactivate_policy - deactivate a blkcg policy on a request_queue
* @q: request_queue of interest
* blkcg_deactivate_policy - deactivate a blkcg policy on a gendisk
* @disk: gendisk of interest
* @pol: blkcg policy to deactivate
*
* Deactivate @pol on @q. Follows the same synchronization rules as
* Deactivate @pol on @disk. Follows the same synchronization rules as
* blkcg_activate_policy().
*/
void blkcg_deactivate_policy(struct request_queue *q,
void blkcg_deactivate_policy(struct gendisk *disk,
const struct blkcg_policy *pol)
{
struct request_queue *q = disk->queue;
struct blkcg_gq *blkg;
if (!blkcg_policy_enabled(q, pol))

9
block/blk-cgroup.h
View File

@ -194,9 +194,8 @@ void blkcg_exit_disk(struct gendisk *disk);
/* Blkio controller policy registration */
int blkcg_policy_register(struct blkcg_policy *pol);
void blkcg_policy_unregister(struct blkcg_policy *pol);
int blkcg_activate_policy(struct request_queue *q,
const struct blkcg_policy *pol);
void blkcg_deactivate_policy(struct request_queue *q,
int blkcg_activate_policy(struct gendisk *disk, const struct blkcg_policy *pol);
void blkcg_deactivate_policy(struct gendisk *disk,
const struct blkcg_policy *pol);
const char *blkg_dev_name(struct blkcg_gq *blkg);
@ -495,9 +494,9 @@ 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,
static inline int blkcg_activate_policy(struct gendisk *disk,
const struct blkcg_policy *pol) { return 0; }
static inline void blkcg_deactivate_policy(struct request_queue *q,
static inline void blkcg_deactivate_policy(struct gendisk *disk,
const struct blkcg_policy *pol) { }
static inline struct blkg_policy_data *blkg_to_pd(struct blkcg_gq *blkg,

4
block/blk-iocost.c
View File

@ -2821,7 +2821,7 @@ static void ioc_rqos_exit(struct rq_qos *rqos)
{
struct ioc *ioc = rqos_to_ioc(rqos);
blkcg_deactivate_policy(rqos->disk->queue, &blkcg_policy_iocost);
blkcg_deactivate_policy(rqos->disk, &blkcg_policy_iocost);
spin_lock_irq(&ioc->lock);
ioc->running = IOC_STOP;
@ -2893,7 +2893,7 @@ static int blk_iocost_init(struct gendisk *disk)
if (ret)
goto err_free_ioc;
ret = blkcg_activate_policy(disk->queue, &blkcg_policy_iocost);
ret = blkcg_activate_policy(disk, &blkcg_policy_iocost);
if (ret)
goto err_del_qos;
return 0;

4
block/blk-iolatency.c
View File

@ -646,7 +646,7 @@ static void blkcg_iolatency_exit(struct rq_qos *rqos)
timer_shutdown_sync(&blkiolat->timer);
flush_work(&blkiolat->enable_work);
blkcg_deactivate_policy(rqos->disk->queue, &blkcg_policy_iolatency);
blkcg_deactivate_policy(rqos->disk, &blkcg_policy_iolatency);
kfree(blkiolat);
}
@ -768,7 +768,7 @@ int blk_iolatency_init(struct gendisk *disk)
&blkcg_iolatency_ops);
if (ret)
goto err_free;
ret = blkcg_activate_policy(disk->queue, &blkcg_policy_iolatency);
ret = blkcg_activate_policy(disk, &blkcg_policy_iolatency);
if (ret)
goto err_qos_del;

4
block/blk-ioprio.c
View File

@ -204,12 +204,12 @@ void blkcg_set_ioprio(struct bio *bio)
void blk_ioprio_exit(struct gendisk *disk)
{
blkcg_deactivate_policy(disk->queue, &ioprio_policy);
blkcg_deactivate_policy(disk, &ioprio_policy);
}
int blk_ioprio_init(struct gendisk *disk)
{
return blkcg_activate_policy(disk->queue, &ioprio_policy);
return blkcg_activate_policy(disk, &ioprio_policy);
}
static int __init ioprio_init(void)

4
block/blk-throttle.c
View File

@ -2395,7 +2395,7 @@ int blk_throtl_init(struct gendisk *disk)
td->low_downgrade_time = jiffies;
/* activate policy */
ret = blkcg_activate_policy(q, &blkcg_policy_throtl);
ret = blkcg_activate_policy(disk, &blkcg_policy_throtl);
if (ret) {
free_percpu(td->latency_buckets[READ]);
free_percpu(td->latency_buckets[WRITE]);
@ -2411,7 +2411,7 @@ void blk_throtl_exit(struct gendisk *disk)
BUG_ON(!q->td);
del_timer_sync(&q->td->service_queue.pending_timer);
throtl_shutdown_wq(q);
blkcg_deactivate_policy(q, &blkcg_policy_throtl);
blkcg_deactivate_policy(disk, &blkcg_policy_throtl);
free_percpu(q->td->latency_buckets[READ]);
free_percpu(q->td->latency_buckets[WRITE]);
kfree(q->td);