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Merge branch 'blk-mq/core' into for-3.13/core

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Signed-off-by: Jens Axboe <axboe@kernel.dk>

Conflicts:
	block/blk-timeout.c
This commit is contained in:
Jens Axboe
2013-11-08 09:08:12 -07:00
parent c7d1ba417c e7e2450001
commit e37459b8e2
28 changed files with 3720 additions and 189 deletions
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74
block/blk-timeout.c
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@@ -7,6 +7,7 @@
#include <linux/fault-inject.h>
#include "blk.h"
#include "blk-mq.h"
#ifdef CONFIG_FAIL_IO_TIMEOUT
@@ -88,10 +89,18 @@ static void blk_rq_timed_out(struct request *req)
ret = q->rq_timed_out_fn(req);
switch (ret) {
case BLK_EH_HANDLED:
__blk_complete_request(req);
/* Can we use req->errors here? */
if (q->mq_ops)
blk_mq_complete_request(req, req->errors);
else
__blk_complete_request(req);
break;
case BLK_EH_RESET_TIMER:
blk_add_timer(req);
if (q->mq_ops)
blk_mq_add_timer(req);
else
blk_add_timer(req);
blk_clear_rq_complete(req);
break;
case BLK_EH_NOT_HANDLED:
@@ -108,6 +117,23 @@ static void blk_rq_timed_out(struct request *req)
}
}
void blk_rq_check_expired(struct request *rq, unsigned long *next_timeout,
unsigned int *next_set)
{
if (time_after_eq(jiffies, rq->deadline)) {
list_del_init(&rq->timeout_list);
/*
* Check if we raced with end io completion
*/
if (!blk_mark_rq_complete(rq))
blk_rq_timed_out(rq);
} else if (!*next_set || time_after(*next_timeout, rq->deadline)) {
*next_timeout = rq->deadline;
*next_set = 1;
}
}
void blk_rq_timed_out_timer(unsigned long data)
{
struct request_queue *q = (struct request_queue *) data;
@@ -117,21 +143,8 @@ void blk_rq_timed_out_timer(unsigned long data)
spin_lock_irqsave(q->queue_lock, flags);
list_for_each_entry_safe(rq, tmp, &q->timeout_list, timeout_list) {
if (time_after_eq(jiffies, rq->deadline)) {
list_del_init(&rq->timeout_list);
/*
* Check if we raced with end io completion
*/
if (blk_mark_rq_complete(rq))
continue;
blk_rq_timed_out(rq);
} else if (!next_set || time_after(next, rq->deadline)) {
next = rq->deadline;
next_set = 1;
}
}
list_for_each_entry_safe(rq, tmp, &q->timeout_list, timeout_list)
blk_rq_check_expired(rq, &next, &next_set);
if (next_set)
mod_timer(&q->timeout, round_jiffies_up(next));
@@ -157,15 +170,7 @@ void blk_abort_request(struct request *req)
}
EXPORT_SYMBOL_GPL(blk_abort_request);
/**
* blk_add_timer - Start timeout timer for a single request
* @req: request that is about to start running.
*
* Notes:
* Each request has its own timer, and as it is added to the queue, we
* set up the timer. When the request completes, we cancel the timer.
*/
void blk_add_timer(struct request *req)
void __blk_add_timer(struct request *req, struct list_head *timeout_list)
{
struct request_queue *q = req->q;
unsigned long expiry;
@@ -183,7 +188,8 @@ void blk_add_timer(struct request *req)
req->timeout = q->rq_timeout;
req->deadline = jiffies + req->timeout;
list_add_tail(&req->timeout_list, &q->timeout_list);
if (timeout_list)
list_add_tail(&req->timeout_list, timeout_list);
/*
* If the timer isn't already pending or this timeout is earlier
@@ -195,5 +201,19 @@ void blk_add_timer(struct request *req)
if (!timer_pending(&q->timeout) ||
time_before(expiry, q->timeout.expires))
mod_timer(&q->timeout, expiry);
}
/**
* blk_add_timer - Start timeout timer for a single request
* @req: request that is about to start running.
*
* Notes:
* Each request has its own timer, and as it is added to the queue, we
* set up the timer. When the request completes, we cancel the timer.
*/
void blk_add_timer(struct request *req)
{
__blk_add_timer(req, &req->q->timeout_list);
}