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| author | Sagi Grimberg <sagig@mellanox.com> | 2016-03-10 13:58:46 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-04-12 13:43:53 -0600 |
| commit | e0489487ec9cd79ee1fa0dc5d3789c08b0e51a2c (patch) | |
| tree | e970b4bbd0d17b9049b243171ed65438e3f5053a /block | |
| parent | 37e58237a16b94fcd2c2d1b7e9c6e1ca661c231b (diff) | |
| download | linux-e0489487ec9cd79ee1fa0dc5d3789c08b0e51a2c.tar.bz2 | |
blk-mq: Export tagset iter function
Its useful to iterate on all the active tags in cases
where we will need to fail all the queues IO.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
[hch: carefully check for valid tagsets]
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq-tag.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index abdbb47405cb..2fd04286f103 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -474,6 +474,18 @@ void blk_mq_all_tag_busy_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn, } EXPORT_SYMBOL(blk_mq_all_tag_busy_iter); +void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, + busy_tag_iter_fn *fn, void *priv) +{ + int i; + + for (i = 0; i < tagset->nr_hw_queues; i++) { + if (tagset->tags && tagset->tags[i]) + blk_mq_all_tag_busy_iter(tagset->tags[i], fn, priv); + } +} +EXPORT_SYMBOL(blk_mq_tagset_busy_iter); + void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn, void *priv) { |