Subject: block: Add interface to abort queued requests From: Mike Anderson Date: Thu Oct 9 08:56:13 2008 +0200: Git: 11914a53d2ec2974a565311af327b8983d8c820d References: FATE#304151,bnc#417544 Adapted for SLES11, based on the original commit. Signed-off-by: Mike Anderson Signed-off-by: Jens Axboe Signed-off-by: Hannes Reinecke --- block/blk-timeout.c | 22 ++++++++++++++++++++++ block/elevator.c | 13 +++++++++++++ include/linux/blkdev.h | 1 + include/linux/blktrace_api.h | 2 ++ include/linux/elevator.h | 1 + 5 files changed, 39 insertions(+) --- a/block/blk-timeout.c +++ b/block/blk-timeout.c @@ -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); --- a/block/elevator.c +++ b/block/elevator.c @@ -922,6 +922,19 @@ int elv_may_queue(struct request_queue * 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; --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -780,6 +780,7 @@ extern int blk_end_request_callback(stru 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. --- a/include/linux/blktrace_api.h +++ b/include/linux/blktrace_api.h @@ -51,6 +51,7 @@ 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 */ __BLK_TA_DRV_DATA, /* driver-specific binary data */ }; @@ -82,6 +83,7 @@ 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_TA_DRV_DATA (__BLK_TA_DRV_DATA | BLK_TC_ACT(BLK_TC_DRV_DATA)) #define BLK_TN_PROCESS (__BLK_TN_PROCESS | BLK_TC_ACT(BLK_TC_NOTIFY)) --- a/include/linux/elevator.h +++ b/include/linux/elevator.h @@ -112,6 +112,7 @@ extern struct request *elv_latter_reques 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 *);