diff options
| author |   Tejun Heo <tj@kernel.org> | 2015-08-18 14:55:15 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2015-08-18 15:49:17 -0700 |
| commit | 814376483e7d85b69a70634633f1f9d01c6ee0cf (patch) | |
| tree | 04d6f2749e947f348a184e75e7bf1bea9ff7d163 /include/linux/blk-cgroup.h | |
| parent | blkcg: make blkcg_policy methods take a pointer to blkcg_policy_data (diff) | |
| download | linux-dev-814376483e7d85b69a70634633f1f9d01c6ee0cf.tar.xz linux-dev-814376483e7d85b69a70634633f1f9d01c6ee0cf.zip | |
blkcg: minor updates around blkcg_policy_data
* Rename blkcg->pd[] to blkcg->cpd[] so that cpd is consistently used
for blkcg_policy_data.
* Make blkcg_policy->cpd_init_fn() take blkcg_policy_data instead of
blkcg. This makes it consistent with blkg_policy_data methods and
to-be-added cpd alloc/free methods.
* blkcg_policy_data->blkcg and cpd_to_blkcg() added so that
cpd_init_fn() can determine the associated blkcg from
blkcg_policy_data.
v2: blkcg_policy_data->blkcg initializations were missing. Added.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Arianna Avanzini <avanzini.arianna@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/blk-cgroup.h')
| -rw-r--r-- | include/linux/blk-cgroup.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h index ddd4b8b252c7..7988d4749fff 100644 --- a/include/linux/blk-cgroup.h +++ b/include/linux/blk-cgroup.h @@ -45,7 +45,7 @@ struct blkcg { struct blkcg_gq *blkg_hint; struct hlist_head blkg_list; - struct blkcg_policy_data *pd[BLKCG_MAX_POLS]; + struct blkcg_policy_data *cpd[BLKCG_MAX_POLS]; struct list_head all_blkcgs_node; #ifdef CONFIG_CGROUP_WRITEBACK @@ -88,7 +88,8 @@ struct blkg_policy_data { * each policy handle per-blkcg data. */ struct blkcg_policy_data { - /* the policy id this per-policy data belongs to */ + /* the blkcg and policy id this per-policy data belongs to */ + struct blkcg *blkcg; int plid; }; @@ -123,7 +124,7 @@ struct blkcg_gq { struct rcu_head rcu_head; }; -typedef void (blkcg_pol_init_cpd_fn)(const struct blkcg *blkcg); +typedef void (blkcg_pol_init_cpd_fn)(struct blkcg_policy_data *cpd); typedef struct blkg_policy_data *(blkcg_pol_alloc_pd_fn)(gfp_t gfp, int node); typedef void (blkcg_pol_init_pd_fn)(struct blkg_policy_data *pd); typedef void (blkcg_pol_online_pd_fn)(struct blkg_policy_data *pd); @@ -243,7 +244,7 @@ static inline struct blkg_policy_data *blkg_to_pd(struct blkcg_gq *blkg, static inline struct blkcg_policy_data *blkcg_to_cpd(struct blkcg *blkcg, struct blkcg_policy *pol) { - return blkcg ? blkcg->pd[pol->plid] : NULL; + return blkcg ? blkcg->cpd[pol->plid] : NULL; } /** @@ -257,6 +258,11 @@ static inline struct blkcg_gq *pd_to_blkg(struct blkg_policy_data *pd) return pd ? pd->blkg : NULL; } +static inline struct blkcg *cpd_to_blkcg(struct blkcg_policy_data *cpd) +{ + return cpd ? cpd->blkcg : NULL; +} + /** * blkg_path - format cgroup path of blkg * @blkg: blkg of interest |