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Commit b276a876 authored by Tejun Heo's avatar Tejun Heo
Browse files

blkcg: add blkg_policy_data->plid 



Add pd->plid so that the policy a pd belongs to can be identified
easily.  This will be used to implement hierarchical blkg_[rw]stats.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarVivek Goyal <vgoyal@redhat.com>
parent d02f7aa8

block/blk-cgroup.c

+2 −0
Original line number Diff line number Diff line
@@ -113,6 +113,7 @@ static struct blkcg_gq *blkg_alloc(struct blkcg *blkcg, struct request_queue *q, 


		blkg->pd[i] = pd;

		pd->blkg = blkg;

		pd->plid = i;



		/* invoke per-policy init */

		if (pol->pd_init_fn)
@@ -908,6 +909,7 @@ int blkcg_activate_policy(struct request_queue *q, 


		blkg->pd[pol->plid] = pd;

		pd->blkg = blkg;

		pd->plid = pol->plid;

		pol->pd_init_fn(blkg);



		spin_unlock(&blkg->blkcg->lock);

block/blk-cgroup.h

+2 −1
Original line number Diff line number Diff line
@@ -81,8 +81,9 @@ struct blkg_rwstat { 
 * beginning and pd_size can't be smaller than pd.

 */

struct blkg_policy_data {

	/* the blkg this per-policy data belongs to */

	/* the blkg and policy id this per-policy data belongs to */

	struct blkcg_gq			*blkg;

	int				plid;



	/* used during policy activation */

	struct list_head		alloc_node;