mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
null_blk: remove legacy IO path
We're planning on removing this code completely, kill the old path. Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
parent
4e6da0fe80
commit
e50b1e327a
1 changed files with 6 additions and 101 deletions
|
@ -616,10 +616,6 @@ static void end_cmd(struct nullb_cmd *cmd)
|
|||
case NULL_Q_MQ:
|
||||
blk_mq_end_request(cmd->rq, cmd->error);
|
||||
return;
|
||||
case NULL_Q_RQ:
|
||||
INIT_LIST_HEAD(&cmd->rq->queuelist);
|
||||
blk_end_request_all(cmd->rq, cmd->error);
|
||||
break;
|
||||
case NULL_Q_BIO:
|
||||
cmd->bio->bi_status = cmd->error;
|
||||
bio_endio(cmd->bio);
|
||||
|
@ -627,15 +623,6 @@ static void end_cmd(struct nullb_cmd *cmd)
|
|||
}
|
||||
|
||||
free_cmd(cmd);
|
||||
|
||||
/* Restart queue if needed, as we are freeing a tag */
|
||||
if (queue_mode == NULL_Q_RQ && blk_queue_stopped(q)) {
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(q->queue_lock, flags);
|
||||
blk_start_queue_async(q);
|
||||
spin_unlock_irqrestore(q->queue_lock, flags);
|
||||
}
|
||||
}
|
||||
|
||||
static enum hrtimer_restart null_cmd_timer_expired(struct hrtimer *timer)
|
||||
|
@ -1136,25 +1123,14 @@ static void null_stop_queue(struct nullb *nullb)
|
|||
|
||||
if (nullb->dev->queue_mode == NULL_Q_MQ)
|
||||
blk_mq_stop_hw_queues(q);
|
||||
else {
|
||||
spin_lock_irq(q->queue_lock);
|
||||
blk_stop_queue(q);
|
||||
spin_unlock_irq(q->queue_lock);
|
||||
}
|
||||
}
|
||||
|
||||
static void null_restart_queue_async(struct nullb *nullb)
|
||||
{
|
||||
struct request_queue *q = nullb->q;
|
||||
unsigned long flags;
|
||||
|
||||
if (nullb->dev->queue_mode == NULL_Q_MQ)
|
||||
blk_mq_start_stopped_hw_queues(q, true);
|
||||
else {
|
||||
spin_lock_irqsave(q->queue_lock, flags);
|
||||
blk_start_queue_async(q);
|
||||
spin_unlock_irqrestore(q->queue_lock, flags);
|
||||
}
|
||||
}
|
||||
|
||||
static bool cmd_report_zone(struct nullb *nullb, struct nullb_cmd *cmd)
|
||||
|
@ -1197,17 +1173,8 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd)
|
|||
/* race with timer */
|
||||
if (atomic_long_read(&nullb->cur_bytes) > 0)
|
||||
null_restart_queue_async(nullb);
|
||||
if (dev->queue_mode == NULL_Q_RQ) {
|
||||
struct request_queue *q = nullb->q;
|
||||
|
||||
spin_lock_irq(q->queue_lock);
|
||||
rq->rq_flags |= RQF_DONTPREP;
|
||||
blk_requeue_request(q, rq);
|
||||
spin_unlock_irq(q->queue_lock);
|
||||
return BLK_STS_OK;
|
||||
} else
|
||||
/* requeue request */
|
||||
return BLK_STS_DEV_RESOURCE;
|
||||
/* requeue request */
|
||||
return BLK_STS_DEV_RESOURCE;
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -1278,9 +1245,6 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd)
|
|||
case NULL_Q_MQ:
|
||||
blk_mq_complete_request(cmd->rq);
|
||||
break;
|
||||
case NULL_Q_RQ:
|
||||
blk_complete_request(cmd->rq);
|
||||
break;
|
||||
case NULL_Q_BIO:
|
||||
/*
|
||||
* XXX: no proper submitting cpu information available.
|
||||
|
@ -1349,30 +1313,6 @@ static blk_qc_t null_queue_bio(struct request_queue *q, struct bio *bio)
|
|||
return BLK_QC_T_NONE;
|
||||
}
|
||||
|
||||
static enum blk_eh_timer_return null_rq_timed_out_fn(struct request *rq)
|
||||
{
|
||||
pr_info("null: rq %p timed out\n", rq);
|
||||
__blk_complete_request(rq);
|
||||
return BLK_EH_DONE;
|
||||
}
|
||||
|
||||
static int null_rq_prep_fn(struct request_queue *q, struct request *req)
|
||||
{
|
||||
struct nullb *nullb = q->queuedata;
|
||||
struct nullb_queue *nq = nullb_to_queue(nullb);
|
||||
struct nullb_cmd *cmd;
|
||||
|
||||
cmd = alloc_cmd(nq, 0);
|
||||
if (cmd) {
|
||||
cmd->rq = req;
|
||||
req->special = cmd;
|
||||
return BLKPREP_OK;
|
||||
}
|
||||
blk_stop_queue(q);
|
||||
|
||||
return BLKPREP_DEFER;
|
||||
}
|
||||
|
||||
static bool should_timeout_request(struct request *rq)
|
||||
{
|
||||
#ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION
|
||||
|
@ -1391,27 +1331,6 @@ static bool should_requeue_request(struct request *rq)
|
|||
return false;
|
||||
}
|
||||
|
||||
static void null_request_fn(struct request_queue *q)
|
||||
{
|
||||
struct request *rq;
|
||||
|
||||
while ((rq = blk_fetch_request(q)) != NULL) {
|
||||
struct nullb_cmd *cmd = rq->special;
|
||||
|
||||
/* just ignore the request */
|
||||
if (should_timeout_request(rq))
|
||||
continue;
|
||||
if (should_requeue_request(rq)) {
|
||||
blk_requeue_request(q, rq);
|
||||
continue;
|
||||
}
|
||||
|
||||
spin_unlock_irq(q->queue_lock);
|
||||
null_handle_cmd(cmd);
|
||||
spin_lock_irq(q->queue_lock);
|
||||
}
|
||||
}
|
||||
|
||||
static enum blk_eh_timer_return null_timeout_rq(struct request *rq, bool res)
|
||||
{
|
||||
pr_info("null: rq %p timed out\n", rq);
|
||||
|
@ -1766,24 +1685,6 @@ static int null_add_dev(struct nullb_device *dev)
|
|||
rv = init_driver_queues(nullb);
|
||||
if (rv)
|
||||
goto out_cleanup_blk_queue;
|
||||
} else {
|
||||
nullb->q = blk_init_queue_node(null_request_fn, &nullb->lock,
|
||||
dev->home_node);
|
||||
if (!nullb->q) {
|
||||
rv = -ENOMEM;
|
||||
goto out_cleanup_queues;
|
||||
}
|
||||
|
||||
if (!null_setup_fault())
|
||||
goto out_cleanup_blk_queue;
|
||||
|
||||
blk_queue_prep_rq(nullb->q, null_rq_prep_fn);
|
||||
blk_queue_softirq_done(nullb->q, null_softirq_done_fn);
|
||||
blk_queue_rq_timed_out(nullb->q, null_rq_timed_out_fn);
|
||||
nullb->q->rq_timeout = 5 * HZ;
|
||||
rv = init_driver_queues(nullb);
|
||||
if (rv)
|
||||
goto out_cleanup_blk_queue;
|
||||
}
|
||||
|
||||
if (dev->mbps) {
|
||||
|
@ -1865,6 +1766,10 @@ static int __init null_init(void)
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (g_queue_mode == NULL_Q_RQ) {
|
||||
pr_err("null_blk: legacy IO path no longer available\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
if (g_queue_mode == NULL_Q_MQ && g_use_per_node_hctx) {
|
||||
if (g_submit_queues != nr_online_nodes) {
|
||||
pr_warn("null_blk: submit_queues param is set to %u.\n",
|
||||
|
|
Loading…
Reference in a new issue