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Revert "blk-cgroup: pass a gendisk to blkg_lookup"

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This reverts commit 821e840c08ad83736eced4037cdad864e95e2584.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230214183308.1658775-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-02-14 19:33:07 +01:00 committed by Jens Axboe
parent b6553bef8c
commit 9a9c261e6b
2 changed files with 18 additions and 18 deletions
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16
block/blk-cgroup.c
View File

@ -350,7 +350,7 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg, struct gendisk *disk,
/* link parent */
if (blkcg_parent(blkcg)) {
blkg->parent = blkg_lookup(blkcg_parent(blkcg), disk);
blkg->parent = blkg_lookup(blkcg_parent(blkcg), disk->queue);
if (WARN_ON_ONCE(!blkg->parent)) {
ret = -ENODEV;
goto err_put_css;
@ -423,12 +423,12 @@ static struct blkcg_gq *blkg_lookup_create(struct blkcg *blkcg,
WARN_ON_ONCE(!rcu_read_lock_held());
blkg = blkg_lookup(blkcg, disk);
blkg = blkg_lookup(blkcg, q);
if (blkg)
return blkg;
spin_lock_irqsave(&q->queue_lock, flags);
blkg = blkg_lookup(blkcg, disk);
blkg = blkg_lookup(blkcg, q);
if (blkg) {
if (blkcg != &blkcg_root &&
blkg != rcu_dereference(blkcg->blkg_hint))
@ -447,7 +447,7 @@ static struct blkcg_gq *blkg_lookup_create(struct blkcg *blkcg,
struct blkcg_gq *ret_blkg = q->root_blkg;
while (parent) {
blkg = blkg_lookup(parent, disk);
blkg = blkg_lookup(parent, q);
if (blkg) {
/* remember closest blkg */
ret_blkg = blkg;
@ -733,7 +733,7 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
goto fail_unlock;
}
blkg = blkg_lookup(blkcg, disk);
blkg = blkg_lookup(blkcg, q);
if (blkg)
goto success;
@ -747,7 +747,7 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
struct blkcg_gq *new_blkg;
parent = blkcg_parent(blkcg);
while (parent && !blkg_lookup(parent, disk)) {
while (parent && !blkg_lookup(parent, q)) {
pos = parent;
parent = blkcg_parent(parent);
}
@ -777,7 +777,7 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
goto fail_preloaded;
}
blkg = blkg_lookup(pos, disk);
blkg = blkg_lookup(pos, q);
if (blkg) {
blkg_free(new_blkg);
} else {
@ -1852,7 +1852,7 @@ void blkcg_maybe_throttle_current(void)
blkcg = css_to_blkcg(blkcg_css());
if (!blkcg)
goto out;
blkg = blkg_lookup(blkcg, disk);
blkg = blkg_lookup(blkcg, disk->queue);
if (!blkg)
goto out;
if (!blkg_tryget(blkg))

20
block/blk-cgroup.h
View File

@ -234,30 +234,30 @@ static inline bool bio_issue_as_root_blkg(struct bio *bio)
}
/**
* blkg_lookup - lookup blkg for the specified blkcg - disk pair
* blkg_lookup - lookup blkg for the specified blkcg - q pair
* @blkcg: blkcg of interest
* @disk: gendisk of interest
* @q: request_queue of interest
*
* Lookup blkg for the @blkcg - @disk pair.
* Lookup blkg for the @blkcg - @q pair.
* Must be called in a RCU critical section.
*/
static inline struct blkcg_gq *blkg_lookup(struct blkcg *blkcg,
struct gendisk *disk)
struct request_queue *q)
{
struct blkcg_gq *blkg;
WARN_ON_ONCE(!rcu_read_lock_held());
if (blkcg == &blkcg_root)
return disk->queue->root_blkg;
return q->root_blkg;
blkg = rcu_dereference(blkcg->blkg_hint);
if (blkg && blkg->disk == disk)
if (blkg && blkg->disk->queue == q)
return blkg;
blkg = radix_tree_lookup(&blkcg->blkg_tree, disk->queue->id);
if (blkg && blkg->disk != disk)
blkg = radix_tree_lookup(&blkcg->blkg_tree, q->id);
if (blkg && blkg->disk->queue != q)
blkg = NULL;
return blkg;
}
@ -357,7 +357,7 @@ static inline void blkg_put(struct blkcg_gq *blkg)
#define blkg_for_each_descendant_pre(d_blkg, pos_css, p_blkg) \
css_for_each_descendant_pre((pos_css), &(p_blkg)->blkcg->css) \
if (((d_blkg) = blkg_lookup(css_to_blkcg(pos_css), \
(p_blkg)->disk)))
(p_blkg)->disk->queue)))
/**
* blkg_for_each_descendant_post - post-order walk of a blkg's descendants
@ -372,7 +372,7 @@ static inline void blkg_put(struct blkcg_gq *blkg)
#define blkg_for_each_descendant_post(d_blkg, pos_css, p_blkg) \
css_for_each_descendant_post((pos_css), &(p_blkg)->blkcg->css) \
if (((d_blkg) = blkg_lookup(css_to_blkcg(pos_css), \
(p_blkg)->disk)))
(p_blkg)->disk->queue)))
bool __blkcg_punt_bio_submit(struct bio *bio);