diff options
| author | Sagi Grimberg <sagi@grimberg.me> | 2016-07-06 15:55:48 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-07-08 17:38:49 +0300 |
| commit | 486cf9899e311838b6ab95d19ff87c4da44d6508 (patch) | |
| tree | e80448aaa15469f06c1215f46fd1494fc7ab9761 /include/linux/blk-mq.h | |
| parent | d9e46d5d7cb0d27a07f6c33a90ac6b4b522a5657 (diff) | |
| download | linux-486cf9899e311838b6ab95d19ff87c4da44d6508.tar.xz | |
blk-mq: Introduce blk_mq_reinit_tagset
The new nvme-rdma driver will need to reinitialize all the tags as part of
the error recovery procedure (realloc the tag memory region). Add a helper
in blk-mq for it that can iterate over all requests in a tagset to make
this easier.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Ming Lin <ming.l@ssi.samsung.com>
Reviewed-by: Stephen Bates <Stephen.Bates@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/blk-mq.h')
| -rw-r--r-- | include/linux/blk-mq.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index cbfd8ca5f13e..e43bbffb5b7a 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -96,6 +96,7 @@ typedef int (init_request_fn)(void *, struct request *, unsigned int, unsigned int, unsigned int); typedef void (exit_request_fn)(void *, struct request *, unsigned int, unsigned int); +typedef int (reinit_request_fn)(void *, struct request *); typedef void (busy_iter_fn)(struct blk_mq_hw_ctx *, struct request *, void *, bool); @@ -145,6 +146,7 @@ struct blk_mq_ops { */ init_request_fn *init_request; exit_request_fn *exit_request; + reinit_request_fn *reinit_request; }; enum { @@ -245,6 +247,7 @@ void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, void blk_mq_freeze_queue(struct request_queue *q); void blk_mq_unfreeze_queue(struct request_queue *q); void blk_mq_freeze_queue_start(struct request_queue *q); +int blk_mq_reinit_tagset(struct blk_mq_tag_set *set); void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues); |