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Commit 99d03c14 authored by NeilBrown's avatar NeilBrown Committed by Alasdair G Kergon
Browse files

dm: per target unplug callback support 



Add per-target unplug callback support.

Cc: linux-raid@vger.kernel.org
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
Signed-off-by: default avatarJonathan Brassow <jbrassow@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 9d357b07

drivers/md/dm-table.c

+5 −0
Original line number Diff line number Diff line
@@ -1278,6 +1278,7 @@ void dm_table_unplug_all(struct dm_table *t) 
{

	struct dm_dev_internal *dd;

	struct list_head *devices = dm_table_get_devices(t);

	struct dm_target_callbacks *cb;



	list_for_each_entry(dd, devices, list) {

		struct request_queue *q = bdev_get_queue(dd->dm_dev.bdev);
@@ -1290,6 +1291,10 @@ void dm_table_unplug_all(struct dm_table *t) 
				     dm_device_name(t->md),

				     bdevname(dd->dm_dev.bdev, b));

	}



	list_for_each_entry(cb, &t->target_callbacks, list)

		if (cb->unplug_fn)

			cb->unplug_fn(cb);

}



struct mapped_device *dm_table_get_md(struct dm_table *t)

include/linux/device-mapper.h

+1 −0
Original line number Diff line number Diff line
@@ -197,6 +197,7 @@ struct dm_target { 
struct dm_target_callbacks {

	struct list_head list;

	int (*congested_fn) (struct dm_target_callbacks *, int);

	void (*unplug_fn)(struct dm_target_callbacks *);

};



int dm_register_target(struct target_type *t);