diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq.c | 45 |
1 files changed, 28 insertions, 17 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 65f43bd696a0..66f3cf9c436d 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1198,7 +1198,7 @@ static struct request *blk_mq_map_request(struct request_queue *q, return rq; } -static int blk_mq_direct_issue_request(struct request *rq) +static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie) { int ret; struct request_queue *q = rq->q; @@ -1209,6 +1209,7 @@ static int blk_mq_direct_issue_request(struct request *rq) .list = NULL, .last = 1 }; + blk_qc_t new_cookie = blk_tag_to_qc_t(rq->tag, hctx->queue_num); /* * For OK queue, we are done. For error, kill it. Any other @@ -1216,18 +1217,21 @@ static int blk_mq_direct_issue_request(struct request *rq) * would have done */ ret = q->mq_ops->queue_rq(hctx, &bd); - if (ret == BLK_MQ_RQ_QUEUE_OK) + if (ret == BLK_MQ_RQ_QUEUE_OK) { + *cookie = new_cookie; return 0; - else { - __blk_mq_requeue_request(rq); + } - if (ret == BLK_MQ_RQ_QUEUE_ERROR) { - rq->errors = -EIO; - blk_mq_end_request(rq, rq->errors); - return 0; - } - return -1; + __blk_mq_requeue_request(rq); + + if (ret == BLK_MQ_RQ_QUEUE_ERROR) { + *cookie = BLK_QC_T_NONE; + rq->errors = -EIO; + blk_mq_end_request(rq, rq->errors); + return 0; } + + return -1; } /* @@ -1244,6 +1248,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) unsigned int request_count = 0; struct blk_plug *plug; struct request *same_queue_rq = NULL; + blk_qc_t cookie; blk_queue_bounce(q, &bio); @@ -1265,6 +1270,8 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) if (unlikely(!rq)) return BLK_QC_T_NONE; + cookie = blk_tag_to_qc_t(rq->tag, data.hctx->queue_num); + if (unlikely(is_flush_fua)) { blk_mq_bio_to_request(rq, bio); blk_insert_flush(rq); @@ -1302,11 +1309,11 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) old_rq = rq; blk_mq_put_ctx(data.ctx); if (!old_rq) - return BLK_QC_T_NONE; - if (!blk_mq_direct_issue_request(old_rq)) - return BLK_QC_T_NONE; + goto done; + if (!blk_mq_direct_issue_request(old_rq, &cookie)) + goto done; blk_mq_insert_request(old_rq, false, true, true); - return BLK_QC_T_NONE; + goto done; } if (!blk_mq_merge_queue_io(data.hctx, data.ctx, rq, bio)) { @@ -1320,7 +1327,8 @@ run_queue: blk_mq_run_hw_queue(data.hctx, !is_sync || is_flush_fua); } blk_mq_put_ctx(data.ctx); - return BLK_QC_T_NONE; +done: + return cookie; } /* @@ -1335,6 +1343,7 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio) unsigned int request_count = 0; struct blk_map_ctx data; struct request *rq; + blk_qc_t cookie; blk_queue_bounce(q, &bio); @@ -1353,6 +1362,8 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio) if (unlikely(!rq)) return BLK_QC_T_NONE; + cookie = blk_tag_to_qc_t(rq->tag, data.hctx->queue_num); + if (unlikely(is_flush_fua)) { blk_mq_bio_to_request(rq, bio); blk_insert_flush(rq); @@ -1375,7 +1386,7 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio) } list_add_tail(&rq->queuelist, &plug->mq_list); blk_mq_put_ctx(data.ctx); - return BLK_QC_T_NONE; + return cookie; } if (!blk_mq_merge_queue_io(data.hctx, data.ctx, rq, bio)) { @@ -1390,7 +1401,7 @@ run_queue: } blk_mq_put_ctx(data.ctx); - return BLK_QC_T_NONE; + return cookie; } /* |