linux-master/block/blk-mq-tag.c

255 	struct request *rq;
259 	rq = tags->rqs[bitnr];
260 	if (!rq || rq->tag != bitnr || !req_ref_inc_not_zero(rq))
261 		rq = NULL;
263 	return rq;
273 	struct request *rq;
284 	 * We can hit rq == NULL here, because the tagging functions
287 	rq = blk_mq_find_and_get_req(tags, bitnr);
288 	if (!rq)
291 	if (rq->q == q && (!hctx || rq->mq_hctx == hctx))
292 		ret = iter_data->fn(rq, iter_data->data);
293 	blk_mq_put_rq_ref(rq);
305  *		@fn will be called as follows: @fn(@hctx, rq, @data, @reserved)
306  *		where rq is a pointer to a request. Return true to continue
342 	struct request *rq;
350 	 * We can hit rq == NULL here, because the tagging functions
354 		rq = tags->static_rqs[bitnr];
356 		rq = blk_mq_find_and_get_req(tags, bitnr);
357 	if (!rq)
361 	    blk_mq_request_started(rq))
362 		ret = iter_data->fn(rq, iter_data->data);
364 		blk_mq_put_rq_ref(rq);
374  *		request. @fn will be called as follows: @fn(rq, @data,
375  *		@reserved) where rq is a pointer to a request. Return true
409  *		request. @fn will be called as follows: @fn(rq, @priv,
410  *		reserved) where rq is a pointer to a request. 'reserved'
411  *		indicates whether or not @rq is a reserved request. Return
427  *		request. @fn will be called as follows: @fn(rq, @priv,
428  *		reserved) where rq is a pointer to a request. 'reserved'
429  *		indicates whether or not @rq is a reserved request. Return
452 static bool blk_mq_tagset_count_completed_rqs(struct request *rq, void *data)
456 	if (blk_mq_request_completed(rq))
486  *		on @q. @fn will be called as follows: @fn(hctx, rq, @priv,
487  *		reserved) where rq is a pointer to a request and hctx points
489  *		indicates whether or not @rq is a reserved request.
668  * @rq: request for which to compute a unique tag
678 u32 blk_mq_unique_tag(struct request *rq)
680 	return (rq->mq_hctx->queue_num << BLK_MQ_UNIQUE_TAG_BITS) |
681 		(rq->tag & BLK_MQ_UNIQUE_TAG_MASK);