diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2014-02-28 15:33:43 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2014-03-27 21:56:24 +0100 |
| commit | 9974fa2c6a7d470ca3c201fe7dbac64bf4dd8d2a (patch) | |
| tree | 623ceaee0342585c95c0eca67ab3e6c4f03bb9e2 | |
| parent | dm mpath: do not call pg_init when it is already running (diff) | |
| download | linux-9974fa2c6a7d470ca3c201fe7dbac64bf4dd8d2a.tar.xz linux-9974fa2c6a7d470ca3c201fe7dbac64bf4dd8d2a.zip | |
dm table: add dm_table_run_md_queue_async
Introduce dm_table_run_md_queue_async() to run the request_queue of the
mapped_device associated with a request-based DM table.
Also add dm_md_get_queue() wrapper to extract the request_queue from a
mapped_device.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
| -rw-r--r-- | drivers/md/dm-table.c | 19 | ||||
| -rw-r--r-- | drivers/md/dm.c | 5 | ||||
| -rw-r--r-- | drivers/md/dm.h | 1 | ||||
| -rw-r--r-- | include/linux/device-mapper.h | 5 |
4 files changed, 30 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 2ae35b2f80fd..50601ec7017a 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1618,6 +1618,25 @@ struct mapped_device *dm_table_get_md(struct dm_table *t) } EXPORT_SYMBOL(dm_table_get_md); +void dm_table_run_md_queue_async(struct dm_table *t) +{ + struct mapped_device *md; + struct request_queue *queue; + unsigned long flags; + + if (!dm_table_request_based(t)) + return; + + md = dm_table_get_md(t); + queue = dm_get_md_queue(md); + if (queue) { + spin_lock_irqsave(queue->queue_lock, flags); + blk_run_queue_async(queue); + spin_unlock_irqrestore(queue->queue_lock, flags); + } +} +EXPORT_SYMBOL(dm_table_run_md_queue_async); + static int device_discard_capable(struct dm_target *ti, struct dm_dev *dev, sector_t start, sector_t len, void *data) { diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 6382213dbd88..455e64916498 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -468,6 +468,11 @@ sector_t dm_get_size(struct mapped_device *md) return get_capacity(md->disk); } +struct request_queue *dm_get_md_queue(struct mapped_device *md) +{ + return md->queue; +} + struct dm_stats *dm_get_stats(struct mapped_device *md) { return &md->stats; diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 88cc58c5871a..ed76126aac54 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -188,6 +188,7 @@ int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only int dm_cancel_deferred_remove(struct mapped_device *md); int dm_request_based(struct mapped_device *md); sector_t dm_get_size(struct mapped_device *md); +struct request_queue *dm_get_md_queue(struct mapped_device *md); struct dm_stats *dm_get_stats(struct mapped_device *md); int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action, diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 5eeeab470cfd..63da56ed9796 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -463,6 +463,11 @@ struct mapped_device *dm_table_get_md(struct dm_table *t); void dm_table_event(struct dm_table *t); /* + * Run the queue for request-based targets. + */ +void dm_table_run_md_queue_async(struct dm_table *t); + +/* * The device must be suspended before calling this method. * Returns the previous table, which the caller must destroy. */ |