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Commit 44ea53de authored by Tejun Heo's avatar Tejun Heo
Browse files

blkcg: implement blkio_policy_type->cftypes 



Add blkiop->cftypes which is added and removed together with the
policy.  This will be used to move conf/stat handling to the policies.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 829fdb50

block/blk-cgroup.c

+6 −0
Original line number Diff line number Diff line
@@ -1538,6 +1538,9 @@ void blkio_policy_register(struct blkio_policy_type *blkiop) 
	list_for_each_entry(q, &all_q_list, all_q_node)

		update_root_blkg_pd(q, blkiop->plid);

	blkcg_bypass_end();



	if (blkiop->cftypes)

		WARN_ON(cgroup_add_cftypes(&blkio_subsys, blkiop->cftypes));

}

EXPORT_SYMBOL_GPL(blkio_policy_register);
@@ -1545,6 +1548,9 @@ void blkio_policy_unregister(struct blkio_policy_type *blkiop) 
{

	struct request_queue *q;



	if (blkiop->cftypes)

		cgroup_rm_cftypes(&blkio_subsys, blkiop->cftypes);



	blkcg_bypass_start();

	spin_lock(&blkio_list_lock);

block/blk-cgroup.h

+1 −0
Original line number Diff line number Diff line
@@ -181,6 +181,7 @@ struct blkio_policy_type { 
	struct blkio_policy_ops ops;

	enum blkio_policy_id plid;

	size_t pdata_size;		/* policy specific private data size */

	struct cftype *cftypes;		/* cgroup files for the policy */

};



extern int blkcg_init_queue(struct request_queue *q);