From e0489487ec9cd79ee1fa0dc5d3789c08b0e51a2c Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Thu, 10 Mar 2016 13:58:46 +0200 Subject: 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 [hch: carefully check for valid tagsets] Reviewed-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Signed-off-by: Jens Axboe --- block/blk-mq-tag.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'block') 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) { -- cgit v1.2.3-58-ga151