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| author | Jens Axboe | 2018-10-29 17:15:10 +0100 |
|---|---|---|
| committer | Jens Axboe | 2018-11-07 21:42:31 +0100 |
| commit | 9ba20527f4d1430b5f3e5f566be5af3e156a3284 (patch) | |
| tree | 0a4470642c0c4a939cf4c4d6a4bd9bf72356e962 /include/linux/blk-mq.h | |
| parent | blk-mq: remove legacy check in queue blk_freeze_queue() (diff) | |
| download | kernel-qcow2-linux-9ba20527f4d1430b5f3e5f566be5af3e156a3284.tar.gz kernel-qcow2-linux-9ba20527f4d1430b5f3e5f566be5af3e156a3284.tar.xz kernel-qcow2-linux-9ba20527f4d1430b5f3e5f566be5af3e156a3284.zip | |
blk-mq: provide mq_ops->busy() hook
We'll hook into this from blk_lld_busy(), allowing blk-mq to also
return whether or not a given queue currently has requests in
progress.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blk-mq.h')
| -rw-r--r-- | include/linux/blk-mq.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 2286dc12c6bc..5c8418ebbfd6 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -114,6 +114,7 @@ typedef void (busy_iter_fn)(struct blk_mq_hw_ctx *, struct request *, void *, typedef void (busy_tag_iter_fn)(struct request *, void *, bool); typedef int (poll_fn)(struct blk_mq_hw_ctx *, unsigned int); typedef int (map_queues_fn)(struct blk_mq_tag_set *set); +typedef bool (busy_fn)(struct request_queue *); struct blk_mq_ops { @@ -165,6 +166,11 @@ struct blk_mq_ops { /* Called from inside blk_get_request() */ void (*initialize_rq_fn)(struct request *rq); + /* + * If set, returns whether or not this queue currently is busy + */ + busy_fn *busy; + map_queues_fn *map_queues; #ifdef CONFIG_BLK_DEBUG_FS |