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blkcg: implement blkio_policy_type->cftypes

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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: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2012-04-01 14:38:43 -07:00
parent 829fdb5000
commit 44ea53de46
2 changed files with 7 additions and 0 deletions
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6
block/blk-cgroup.c
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@ -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);

1
block/blk-cgroup.h
View File

@ -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);