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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: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2012-04-01 14:38:44 -07:00
parent 41b38b6d54
commit 9ade5ea4ce
2 changed files with 16 additions and 4 deletions
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12
block/blk-cgroup.c
View File

@ -131,13 +131,18 @@ static void blkg_free(struct blkio_group *blkg)
return; return;
for (i = 0; i < BLKIO_NR_POLICIES; i++) { for (i = 0; i < BLKIO_NR_POLICIES; i++) {
struct blkio_policy_type *pol = blkio_policy[i];
struct blkg_policy_data *pd = blkg->pd[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); free_percpu(pd->stats_cpu);
kfree(pd); kfree(pd);
} }
}
kfree(blkg); kfree(blkg);
} }
@ -432,6 +437,9 @@ blkiocg_reset_stats(struct cgroup *cgroup, struct cftype *cftype, u64 val)
blkg_stat_reset(&stats->empty_time); blkg_stat_reset(&stats->empty_time);
#endif #endif
blkio_reset_stats_cpu(blkg, pol->plid); blkio_reset_stats_cpu(blkg, pol->plid);
if (pol->ops.blkio_reset_group_stats_fn)
pol->ops.blkio_reset_group_stats_fn(blkg);
} }
} }

4
block/blk-cgroup.h
View File

@ -153,9 +153,13 @@ struct blkio_group {
}; };
typedef void (blkio_init_group_fn)(struct blkio_group *blkg); 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 { struct blkio_policy_ops {
blkio_init_group_fn *blkio_init_group_fn; 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 { struct blkio_policy_type {