93252632e8
If a new hardware queue is added at runtime, we don't allocate scheduler
tags for it, leading to a crash. This hooks up the scheduler framework
to blk_mq_{init,exit}_hctx() to make sure everything gets properly
initialized/freed.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
159 lines
4.5 KiB
C
159 lines
4.5 KiB
C
#ifndef BLK_MQ_SCHED_H
|
|
#define BLK_MQ_SCHED_H
|
|
|
|
#include "blk-mq.h"
|
|
#include "blk-mq-tag.h"
|
|
|
|
int blk_mq_sched_init_hctx_data(struct request_queue *q, size_t size,
|
|
int (*init)(struct blk_mq_hw_ctx *),
|
|
void (*exit)(struct blk_mq_hw_ctx *));
|
|
|
|
void blk_mq_sched_free_hctx_data(struct request_queue *q,
|
|
void (*exit)(struct blk_mq_hw_ctx *));
|
|
|
|
struct request *blk_mq_sched_get_request(struct request_queue *q, struct bio *bio, unsigned int op, struct blk_mq_alloc_data *data);
|
|
void blk_mq_sched_put_request(struct request *rq);
|
|
|
|
void blk_mq_sched_request_inserted(struct request *rq);
|
|
bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
|
|
struct request **merged_request);
|
|
bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
|
|
bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
|
|
void blk_mq_sched_restart_queues(struct blk_mq_hw_ctx *hctx);
|
|
|
|
void blk_mq_sched_insert_request(struct request *rq, bool at_head,
|
|
bool run_queue, bool async, bool can_block);
|
|
void blk_mq_sched_insert_requests(struct request_queue *q,
|
|
struct blk_mq_ctx *ctx,
|
|
struct list_head *list, bool run_queue_async);
|
|
|
|
void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
|
|
void blk_mq_sched_move_to_dispatch(struct blk_mq_hw_ctx *hctx,
|
|
struct list_head *rq_list,
|
|
struct request *(*get_rq)(struct blk_mq_hw_ctx *));
|
|
|
|
int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
|
|
void blk_mq_sched_teardown(struct request_queue *q);
|
|
|
|
int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
|
|
unsigned int hctx_idx);
|
|
void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx,
|
|
unsigned int hctx_idx);
|
|
|
|
int blk_mq_sched_init(struct request_queue *q);
|
|
|
|
static inline bool
|
|
blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
|
|
{
|
|
struct elevator_queue *e = q->elevator;
|
|
|
|
if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio))
|
|
return false;
|
|
|
|
return __blk_mq_sched_bio_merge(q, bio);
|
|
}
|
|
|
|
static inline int blk_mq_sched_get_rq_priv(struct request_queue *q,
|
|
struct request *rq,
|
|
struct bio *bio)
|
|
{
|
|
struct elevator_queue *e = q->elevator;
|
|
|
|
if (e && e->type->ops.mq.get_rq_priv)
|
|
return e->type->ops.mq.get_rq_priv(q, rq, bio);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void blk_mq_sched_put_rq_priv(struct request_queue *q,
|
|
struct request *rq)
|
|
{
|
|
struct elevator_queue *e = q->elevator;
|
|
|
|
if (e && e->type->ops.mq.put_rq_priv)
|
|
e->type->ops.mq.put_rq_priv(q, rq);
|
|
}
|
|
|
|
static inline bool
|
|
blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
|
|
struct bio *bio)
|
|
{
|
|
struct elevator_queue *e = q->elevator;
|
|
|
|
if (e && e->type->ops.mq.allow_merge)
|
|
return e->type->ops.mq.allow_merge(q, rq, bio);
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline void
|
|
blk_mq_sched_completed_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
|
|
{
|
|
struct elevator_queue *e = hctx->queue->elevator;
|
|
|
|
if (e && e->type->ops.mq.completed_request)
|
|
e->type->ops.mq.completed_request(hctx, rq);
|
|
|
|
BUG_ON(rq->internal_tag == -1);
|
|
|
|
blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag);
|
|
}
|
|
|
|
static inline void blk_mq_sched_started_request(struct request *rq)
|
|
{
|
|
struct request_queue *q = rq->q;
|
|
struct elevator_queue *e = q->elevator;
|
|
|
|
if (e && e->type->ops.mq.started_request)
|
|
e->type->ops.mq.started_request(rq);
|
|
}
|
|
|
|
static inline void blk_mq_sched_requeue_request(struct request *rq)
|
|
{
|
|
struct request_queue *q = rq->q;
|
|
struct elevator_queue *e = q->elevator;
|
|
|
|
if (e && e->type->ops.mq.requeue_request)
|
|
e->type->ops.mq.requeue_request(rq);
|
|
}
|
|
|
|
static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
|
|
{
|
|
struct elevator_queue *e = hctx->queue->elevator;
|
|
|
|
if (e && e->type->ops.mq.has_work)
|
|
return e->type->ops.mq.has_work(hctx);
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Mark a hardware queue as needing a restart.
|
|
*/
|
|
static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx)
|
|
{
|
|
if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
|
|
set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
|
|
}
|
|
|
|
/*
|
|
* Mark a hardware queue and the request queue it belongs to as needing a
|
|
* restart.
|
|
*/
|
|
static inline void blk_mq_sched_mark_restart_queue(struct blk_mq_hw_ctx *hctx)
|
|
{
|
|
struct request_queue *q = hctx->queue;
|
|
|
|
if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
|
|
set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
|
|
if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags))
|
|
set_bit(QUEUE_FLAG_RESTART, &q->queue_flags);
|
|
}
|
|
|
|
static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
|
|
{
|
|
return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
|
|
}
|
|
|
|
#endif
|