Switch to passing a gendisk, and make rq_qos_add initialize all required
fields and drop the not required q argument from rq_qos_del. Also move
the code out of line given how large it is.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Andreas Herrmann <aherrmann@xxxxxxx>
---
block/blk-iocost.c | 13 ++-------
block/blk-iolatency.c | 14 +++------
block/blk-rq-qos.c | 67 +++++++++++++++++++++++++++++++++++++++++++
block/blk-rq-qos.h | 62 ++-------------------------------------
block/blk-wbt.c | 5 +---
5 files changed, 78 insertions(+), 83 deletions(-)
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index dbb93f4f68d979..5f28463cba0afe 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2843,9 +2843,7 @@ static struct rq_qos_ops ioc_rqos_ops = {
static int blk_iocost_init(struct gendisk *disk)
{
- struct request_queue *q = disk->queue;
struct ioc *ioc;
- struct rq_qos *rqos;
int i, cpu, ret;
ioc = kzalloc(sizeof(*ioc), GFP_KERNEL);
@@ -2868,11 +2866,6 @@ static int blk_iocost_init(struct gendisk *disk)
local64_set(&ccs->rq_wait_ns, 0);
}
- rqos = &ioc->rqos;
- rqos->id = RQ_QOS_COST;
- rqos->ops = &ioc_rqos_ops;
- rqos->q = q;
-
spin_lock_init(&ioc->lock);
timer_setup(&ioc->timer, ioc_timer_fn, 0);
INIT_LIST_HEAD(&ioc->active_iocgs);
@@ -2896,17 +2889,17 @@ static int blk_iocost_init(struct gendisk *disk)
* called before policy activation completion, can't assume that the
* target bio has an iocg associated and need to test for NULL iocg.
*/
- ret = rq_qos_add(q, rqos);
+ ret = rq_qos_add(&ioc->rqos, disk, RQ_QOS_COST, &ioc_rqos_ops);
if (ret)
goto err_free_ioc;
- ret = blkcg_activate_policy(q, &blkcg_policy_iocost);
+ ret = blkcg_activate_policy(disk->queue, &blkcg_policy_iocost);
if (ret)
goto err_del_qos;
return 0;
err_del_qos:
- rq_qos_del(q, rqos);
+ rq_qos_del(&ioc->rqos);
err_free_ioc:
free_percpu(ioc->pcpu_stat);
kfree(ioc);
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index b55eac2cf91944..1c394bd77aa0b4 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -757,24 +757,18 @@ static void blkiolatency_enable_work_fn(struct work_struct *work)
int blk_iolatency_init(struct gendisk *disk)
{
- struct request_queue *q = disk->queue;
struct blk_iolatency *blkiolat;
- struct rq_qos *rqos;
int ret;
blkiolat = kzalloc(sizeof(*blkiolat), GFP_KERNEL);
if (!blkiolat)
return -ENOMEM;
- rqos = &blkiolat->rqos;
- rqos->id = RQ_QOS_LATENCY;
- rqos->ops = &blkcg_iolatency_ops;
- rqos->q = q;
-
- ret = rq_qos_add(q, rqos);
+ ret = rq_qos_add(&blkiolat->rqos, disk, RQ_QOS_LATENCY,
+ &blkcg_iolatency_ops);
if (ret)
goto err_free;
- ret = blkcg_activate_policy(q, &blkcg_policy_iolatency);
+ ret = blkcg_activate_policy(disk->queue, &blkcg_policy_iolatency);
if (ret)
goto err_qos_del;
@@ -784,7 +778,7 @@ int blk_iolatency_init(struct gendisk *disk)
return 0;
err_qos_del:
- rq_qos_del(q, rqos);
+ rq_qos_del(&blkiolat->rqos);
err_free:
kfree(blkiolat);
return ret;
diff --git a/block/blk-rq-qos.c b/block/blk-rq-qos.c
index 88f0fe7dcf5451..14bee1bd761362 100644
--- a/block/blk-rq-qos.c
+++ b/block/blk-rq-qos.c
@@ -294,3 +294,70 @@ void rq_qos_exit(struct request_queue *q)
rqos->ops->exit(rqos);
}
}
+
+int rq_qos_add(struct rq_qos *rqos, struct gendisk *disk, enum rq_qos_id id,
+ struct rq_qos_ops *ops)
+{
+ struct request_queue *q = disk->queue;
+
+ rqos->q = q;
+ rqos->id = id;
+ rqos->ops = ops;
+
+ /*
+ * No IO can be in-flight when adding rqos, so freeze queue, which
+ * is fine since we only support rq_qos for blk-mq queue.
+ *
+ * Reuse ->queue_lock for protecting against other concurrent
+ * rq_qos adding/deleting
+ */
+ blk_mq_freeze_queue(q);
+
+ spin_lock_irq(&q->queue_lock);
+ if (rq_qos_id(q, rqos->id))
+ goto ebusy;
+ rqos->next = q->rq_qos;
+ q->rq_qos = rqos;
+ spin_unlock_irq(&q->queue_lock);
+
+ blk_mq_unfreeze_queue(q);
+
+ if (rqos->ops->debugfs_attrs) {
+ mutex_lock(&q->debugfs_mutex);
+ blk_mq_debugfs_register_rqos(rqos);
+ mutex_unlock(&q->debugfs_mutex);
+ }
+
+ return 0;
+ebusy:
+ spin_unlock_irq(&q->queue_lock);
+ blk_mq_unfreeze_queue(q);
+ return -EBUSY;
+}
+
+void rq_qos_del(struct rq_qos *rqos)
+{
+ struct request_queue *q = rqos->q;
+ struct rq_qos **cur;
+
+ /*
+ * See comment in rq_qos_add() about freezing queue & using
+ * ->queue_lock.
+ */
+ blk_mq_freeze_queue(q);
+
+ spin_lock_irq(&q->queue_lock);
+ for (cur = &q->rq_qos; *cur; cur = &(*cur)->next) {
+ if (*cur == rqos) {
+ *cur = rqos->next;
+ break;
+ }
+ }
+ spin_unlock_irq(&q->queue_lock);
+
+ blk_mq_unfreeze_queue(q);
+
+ mutex_lock(&q->debugfs_mutex);
+ blk_mq_debugfs_unregister_rqos(rqos);
+ mutex_unlock(&q->debugfs_mutex);
+}
diff --git a/block/blk-rq-qos.h b/block/blk-rq-qos.h
index 1ef1f7d4bc3cbc..22552785aa31ed 100644
--- a/block/blk-rq-qos.h
+++ b/block/blk-rq-qos.h
@@ -85,65 +85,9 @@ static inline void rq_wait_init(struct rq_wait *rq_wait)
init_waitqueue_head(&rq_wait->wait);
}
-static inline int rq_qos_add(struct request_queue *q, struct rq_qos *rqos)
-{
- /*
- * No IO can be in-flight when adding rqos, so freeze queue, which
- * is fine since we only support rq_qos for blk-mq queue.
- *
- * Reuse ->queue_lock for protecting against other concurrent
- * rq_qos adding/deleting
- */
- blk_mq_freeze_queue(q);
-
- spin_lock_irq(&q->queue_lock);
- if (rq_qos_id(q, rqos->id))
- goto ebusy;
- rqos->next = q->rq_qos;
- q->rq_qos = rqos;
- spin_unlock_irq(&q->queue_lock);
-
- blk_mq_unfreeze_queue(q);
-
- if (rqos->ops->debugfs_attrs) {
- mutex_lock(&q->debugfs_mutex);
- blk_mq_debugfs_register_rqos(rqos);
- mutex_unlock(&q->debugfs_mutex);
- }
-
- return 0;
-ebusy:
- spin_unlock_irq(&q->queue_lock);
- blk_mq_unfreeze_queue(q);
- return -EBUSY;
-
-}
-
-static inline void rq_qos_del(struct request_queue *q, struct rq_qos *rqos)
-{
- struct rq_qos **cur;
-
- /*
- * See comment in rq_qos_add() about freezing queue & using
- * ->queue_lock.
- */
- blk_mq_freeze_queue(q);
-
- spin_lock_irq(&q->queue_lock);
- for (cur = &q->rq_qos; *cur; cur = &(*cur)->next) {
- if (*cur == rqos) {
- *cur = rqos->next;
- break;
- }
- }
- spin_unlock_irq(&q->queue_lock);
-
- blk_mq_unfreeze_queue(q);
-
- mutex_lock(&q->debugfs_mutex);
- blk_mq_debugfs_unregister_rqos(rqos);
- mutex_unlock(&q->debugfs_mutex);
-}
+int rq_qos_add(struct rq_qos *rqos, struct gendisk *disk, enum rq_qos_id id,
+ struct rq_qos_ops *ops);
+void rq_qos_del(struct rq_qos *rqos);
typedef bool (acquire_inflight_cb_t)(struct rq_wait *rqw, void *private_data);
typedef void (cleanup_cb_t)(struct rq_wait *rqw, void *private_data);
diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 473ae72befaf1a..0b339850fb761a 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -855,9 +855,6 @@ int wbt_init(struct gendisk *disk)
for (i = 0; i < WBT_NUM_RWQ; i++)
rq_wait_init(&rwb->rq_wait[i]);
- rwb->rqos.id = RQ_QOS_WBT;
- rwb->rqos.ops = &wbt_rqos_ops;
- rwb->rqos.q = q;
rwb->last_comp = rwb->last_issue = jiffies;
rwb->win_nsec = RWB_WINDOW_NSEC;
rwb->enable_state = WBT_STATE_ON_DEFAULT;
@@ -870,7 +867,7 @@ int wbt_init(struct gendisk *disk)
/*
* Assign rwb and add the stats callback.
*/
- ret = rq_qos_add(q, &rwb->rqos);
+ ret = rq_qos_add(&rwb->rqos, disk, RQ_QOS_WBT, &wbt_rqos_ops);
if (ret)
goto err_free;
--
2.39.0
