示例#1
0
/**
 * blk_complete_request - end I/O on a request
 * @req:      the request being processed
 *
 * Description:
 *     Ends all I/O on a request. It does not handle partial completions,
 *     unless the driver actually implements this in its completion callback
 *     through requeueing. The actual completion happens out-of-order,
 *     through a softirq handler. The user must have registered a completion
 *     callback through blk_queue_softirq_done().
 **/
void blk_complete_request(struct request *req)
{
	if (unlikely(blk_should_fake_timeout(req->q)))
		return;
	if (!blk_mark_rq_complete(req))
		__blk_complete_request(req);
}
示例#2
0
/**
 * blk_complete_request - end I/O on a request
 * @req:      the request being processed
 *
 * Description:
 *     Ends all I/O on a request. It does not handle partial completions,
 *     unless the driver actually implements this in its completion callback
 *     through requeueing. The actual completion happens out-of-order,
 *     through a softirq handler. The user must have registered a completion
 *     callback through blk_queue_softirq_done().
 **/
void blk_complete_request(struct request *req)
{   /* Linux允许程序员通过注入错误的方式来模拟故障,来检查程序对故障的处理是否完善 */
	if (unlikely(blk_should_fake_timeout(req->q)))  /* 检查注入错误 */
		return;
	if (!blk_mark_rq_complete(req)) /* 原子地设置REQ_ATOM_COMPLETE */
		__blk_complete_request(req);
}
示例#3
0
文件: blk-timeout.c 项目: 7799/linux
/**
 * blk_abort_request -- Request request recovery for the specified command
 * @req:	pointer to the request of interest
 *
 * This function requests that the block layer start recovery for the
 * request by deleting the timer and calling the q's timeout function.
 * LLDDs who implement their own error recovery MAY ignore the timeout
 * event if they generated blk_abort_req. Must hold queue lock.
 */
void blk_abort_request(struct request *req)
{
	if (blk_mark_rq_complete(req))
		return;
	blk_delete_timer(req);
	blk_rq_timed_out(req);
}
示例#4
0
/**
 * blk_complete_request - end I/O on a request
 * @req:      the request being processed
 *
 * Description:
 *     Ends all I/O on a request. It does not handle partial completions,
 *     unless the driver actually implements this in its completion callback
 *     through requeueing. The actual completion happens out-of-order,
 *     through a softirq handler. The user must have registered a completion
 *     callback through blk_queue_softirq_done().
 **/
void blk_complete_request(struct request *req)
{
	if (unlikely(blk_should_fake_timeout(req->q)))
		return;
#ifdef CONFIG_HISI_IO_LATENCY_TRACE
	req_latency_check(req,REQ_PROC_STAGE_COMPLETE);
#endif
	if (!blk_mark_rq_complete(req))
		__blk_complete_request(req);
}
示例#5
0
/**
 * blk_abort_request -- Request request recovery for the specified command
 * @req:	pointer to the request of interest
 *
 * This function requests that the block layer start recovery for the
 * request by deleting the timer and calling the q's timeout function.
 * LLDDs who implement their own error recovery MAY ignore the timeout
 * event if they generated blk_abort_req. Must hold queue lock.
 */
void blk_abort_request(struct request *req)
{
	if (blk_mark_rq_complete(req))
		return;
	blk_delete_timer(req);
	if (req->q->mq_ops)
		blk_mq_rq_timed_out(req, false);
	else
		blk_rq_timed_out(req);
}
示例#6
0
static 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;
	}
}