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Commit 9ade5ea4 authored by Tejun Heo's avatar Tejun Heo
Browse files

blkcg: add blkio_policy_ops operations for exit and stat reset 



Add blkio_policy_ops->blkio_exit_group_fn() and
->blkio_reset_group_stats_fn().  These will be used to further
modularize blkcg policy implementation.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 41b38b6d

block/blk-cgroup.c

+12 −4
Original line number Diff line number Diff line
@@ -131,13 +131,18 @@ static void blkg_free(struct blkio_group *blkg) 
		return;



	for (i = 0; i < BLKIO_NR_POLICIES; i++) {

		struct blkio_policy_type *pol = blkio_policy[i];

		struct blkg_policy_data *pd = blkg->pd[i];



		if (pd) {

		if (!pd)

			continue;



		if (pol && pol->ops.blkio_exit_group_fn)

			pol->ops.blkio_exit_group_fn(blkg);



		free_percpu(pd->stats_cpu);

		kfree(pd);

	}

	}



	kfree(blkg);

}
@@ -432,6 +437,9 @@ blkiocg_reset_stats(struct cgroup *cgroup, struct cftype *cftype, u64 val) 
			blkg_stat_reset(&stats->empty_time);

#endif

			blkio_reset_stats_cpu(blkg, pol->plid);



			if (pol->ops.blkio_reset_group_stats_fn)

				pol->ops.blkio_reset_group_stats_fn(blkg);

		}

	}

block/blk-cgroup.h

+4 −0
Original line number Diff line number Diff line
@@ -153,9 +153,13 @@ struct blkio_group { 
};



typedef void (blkio_init_group_fn)(struct blkio_group *blkg);

typedef void (blkio_exit_group_fn)(struct blkio_group *blkg);

typedef void (blkio_reset_group_stats_fn)(struct blkio_group *blkg);



struct blkio_policy_ops {

	blkio_init_group_fn *blkio_init_group_fn;

	blkio_exit_group_fn *blkio_exit_group_fn;

	blkio_reset_group_stats_fn *blkio_reset_group_stats_fn;

};



struct blkio_policy_type {