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Commit 11914a53 authored by Mike Anderson's avatar Mike Anderson Committed by Jens Axboe
Browse files

block: Add interface to abort queued requests 



Signed-off-by: default avatarMike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 242f9dcb

block/blk-timeout.c

+22 −0
Original line number Diff line number Diff line
@@ -153,3 +153,25 @@ void blk_add_timer(struct request *req) 
	    time_before(expiry, q->timeout.expires))

		mod_timer(&q->timeout, expiry);

}



/**

 * blk_abort_queue -- Abort all request on given queue

 * @queue:	pointer to queue

 *

 */

void blk_abort_queue(struct request_queue *q)

{

	unsigned long flags;

	struct request *rq, *tmp;



	spin_lock_irqsave(q->queue_lock, flags);



	elv_abort_queue(q);



	list_for_each_entry_safe(rq, tmp, &q->timeout_list, timeout_list)

		blk_abort_request(rq);



	spin_unlock_irqrestore(q->queue_lock, flags);



}

EXPORT_SYMBOL_GPL(blk_abort_queue);

block/elevator.c

+13 −0
Original line number Diff line number Diff line
@@ -914,6 +914,19 @@ int elv_may_queue(struct request_queue *q, int rw) 
	return ELV_MQUEUE_MAY;

}



void elv_abort_queue(struct request_queue *q)

{

	struct request *rq;



	while (!list_empty(&q->queue_head)) {

		rq = list_entry_rq(q->queue_head.next);

		rq->cmd_flags |= REQ_QUIET;

		blk_add_trace_rq(q, rq, BLK_TA_ABORT);

		end_queued_request(rq, 0);

	}

}

EXPORT_SYMBOL(elv_abort_queue);



void elv_completed_request(struct request_queue *q, struct request *rq)

{

	elevator_t *e = q->elevator;

include/linux/blkdev.h

+1 −0
Original line number Diff line number Diff line
@@ -788,6 +788,7 @@ extern int blk_end_request_callback(struct request *rq, int error, 
extern void blk_complete_request(struct request *);

extern void __blk_complete_request(struct request *);

extern void blk_abort_request(struct request *);

extern void blk_abort_queue(struct request_queue *);



/*

 * blk_end_request() takes bytes instead of sectors as a complete size.

include/linux/blktrace_api.h

+2 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ enum blktrace_act { 
	__BLK_TA_SPLIT,			/* bio was split */

	__BLK_TA_BOUNCE,		/* bio was bounced */

	__BLK_TA_REMAP,			/* bio was remapped */

	__BLK_TA_ABORT,			/* request aborted */

};



/*
@@ -78,6 +79,7 @@ enum blktrace_notify { 
#define BLK_TA_SPLIT		(__BLK_TA_SPLIT)

#define BLK_TA_BOUNCE		(__BLK_TA_BOUNCE)

#define BLK_TA_REMAP		(__BLK_TA_REMAP | BLK_TC_ACT(BLK_TC_QUEUE))

#define BLK_TA_ABORT		(__BLK_TA_ABORT | BLK_TC_ACT(BLK_TC_QUEUE))



#define BLK_TN_PROCESS		(__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY))

#define BLK_TN_TIMESTAMP	(__BLK_TN_TIMESTAMP | BLK_TC_ACT(BLK_TC_NOTIFY))

include/linux/elevator.h

+1 −0
Original line number Diff line number Diff line
@@ -112,6 +112,7 @@ extern struct request *elv_latter_request(struct request_queue *, struct request 
extern int elv_register_queue(struct request_queue *q);

extern void elv_unregister_queue(struct request_queue *q);

extern int elv_may_queue(struct request_queue *, int);

extern void elv_abort_queue(struct request_queue *);

extern void elv_completed_request(struct request_queue *, struct request *);

extern int elv_set_request(struct request_queue *, struct request *, gfp_t);

extern void elv_put_request(struct request_queue *, struct request *);