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Commit 149e10f8 authored by Sagi Grimberg's avatar Sagi Grimberg Committed by Christoph Hellwig
Browse files

block: introduce blk_mq_tagset_iter 



Iterator helper to apply a function on all the
tags in a given tagset. export it as it will be used
outside the block layer later on.

Reviewed-by: default avatarBart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: default avatarJens Axboe <axboe@kernel.dk>
Reviewed-by: default avatarMax Gurtovoy <maxg@mellanox.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 761f2e1e

block/blk-mq-tag.c

+11 −5
Original line number Diff line number Diff line
@@ -298,12 +298,12 @@ void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, 
}

EXPORT_SYMBOL(blk_mq_tagset_busy_iter);



int blk_mq_reinit_tagset(struct blk_mq_tag_set *set,

			 int (reinit_request)(void *, struct request *))

int blk_mq_tagset_iter(struct blk_mq_tag_set *set, void *data,

			 int (fn)(void *, struct request *))

{

	int i, j, ret = 0;



	if (WARN_ON_ONCE(!reinit_request))

	if (WARN_ON_ONCE(!fn))

		goto out;



	for (i = 0; i < set->nr_hw_queues; i++) {
@@ -316,8 +316,7 @@ int blk_mq_reinit_tagset(struct blk_mq_tag_set *set, 
			if (!tags->static_rqs[j])

				continue;



			ret = reinit_request(set->driver_data,

					     tags->static_rqs[j]);

			ret = fn(data, tags->static_rqs[j]);

			if (ret)

				goto out;

		}
@@ -326,6 +325,13 @@ int blk_mq_reinit_tagset(struct blk_mq_tag_set *set, 
out:

	return ret;

}

EXPORT_SYMBOL_GPL(blk_mq_tagset_iter);



int blk_mq_reinit_tagset(struct blk_mq_tag_set *set,

			 int (reinit_request)(void *, struct request *))

{

	return blk_mq_tagset_iter(set, set->driver_data, reinit_request);

}

EXPORT_SYMBOL_GPL(blk_mq_reinit_tagset);



void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,

include/linux/blk-mq.h

+2 −0
Original line number Diff line number Diff line
@@ -259,6 +259,8 @@ void blk_freeze_queue_start(struct request_queue *q); 
void blk_mq_freeze_queue_wait(struct request_queue *q);

int blk_mq_freeze_queue_wait_timeout(struct request_queue *q,

				     unsigned long timeout);

int blk_mq_tagset_iter(struct blk_mq_tag_set *set, void *data,

		int (reinit_request)(void *, struct request *));

int blk_mq_reinit_tagset(struct blk_mq_tag_set *set,

			 int (reinit_request)(void *, struct request *));