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-rw-r--r--block/blk-cgroup.h109
1 files changed, 54 insertions, 55 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index b347aa08d166..a443b84d2c16 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -37,7 +37,7 @@ enum blkg_rwstat_type {
BLKG_RWSTAT_TOTAL = BLKG_RWSTAT_NR,
};
-struct blkio_cgroup {
+struct blkcg {
struct cgroup_subsys_state css;
spinlock_t lock;
struct hlist_head blkg_list;
@@ -45,7 +45,7 @@ struct blkio_cgroup {
/* for policies to test whether associated blkcg has changed */
uint64_t id;
- /* TODO: per-policy storage in blkio_cgroup */
+ /* TODO: per-policy storage in blkcg */
unsigned int cfq_weight; /* belongs to cfq */
};
@@ -62,7 +62,7 @@ struct blkg_rwstat {
/* per-blkg per-policy data */
struct blkg_policy_data {
/* the blkg this per-policy data belongs to */
- struct blkio_group *blkg;
+ struct blkcg_gq *blkg;
/* used during policy activation */
struct list_head alloc_node;
@@ -71,12 +71,13 @@ struct blkg_policy_data {
char pdata[] __aligned(__alignof__(unsigned long long));
};
-struct blkio_group {
+/* association between a blk cgroup and a request queue */
+struct blkcg_gq {
/* Pointer to the associated request_queue */
struct request_queue *q;
struct list_head q_node;
struct hlist_node blkcg_node;
- struct blkio_cgroup *blkcg;
+ struct blkcg *blkcg;
/* reference count */
int refcnt;
@@ -85,18 +86,18 @@ struct blkio_group {
struct rcu_head rcu_head;
};
-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);
+typedef void (blkcg_pol_init_pd_fn)(struct blkcg_gq *blkg);
+typedef void (blkcg_pol_exit_pd_fn)(struct blkcg_gq *blkg);
+typedef void (blkcg_pol_reset_pd_stats_fn)(struct blkcg_gq *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 blkcg_policy_ops {
+ blkcg_pol_init_pd_fn *pd_init_fn;
+ blkcg_pol_exit_pd_fn *pd_exit_fn;
+ blkcg_pol_reset_pd_stats_fn *pd_reset_stats_fn;
};
-struct blkio_policy_type {
- struct blkio_policy_ops ops;
+struct blkcg_policy {
+ struct blkcg_policy_ops ops;
int plid;
/* policy specific private data size */
size_t pdata_size;
@@ -104,29 +105,28 @@ struct blkio_policy_type {
struct cftype *cftypes;
};
-extern struct blkio_cgroup blkio_root_cgroup;
+extern struct blkcg blkcg_root;
-struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup);
-struct blkio_cgroup *bio_blkio_cgroup(struct bio *bio);
-struct blkio_group *blkg_lookup(struct blkio_cgroup *blkcg,
- struct request_queue *q);
-struct blkio_group *blkg_lookup_create(struct blkio_cgroup *blkcg,
- struct request_queue *q);
+struct blkcg *cgroup_to_blkcg(struct cgroup *cgroup);
+struct blkcg *bio_blkcg(struct bio *bio);
+struct blkcg_gq *blkg_lookup(struct blkcg *blkcg, struct request_queue *q);
+struct blkcg_gq *blkg_lookup_create(struct blkcg *blkcg,
+ struct request_queue *q);
int blkcg_init_queue(struct request_queue *q);
void blkcg_drain_queue(struct request_queue *q);
void blkcg_exit_queue(struct request_queue *q);
/* Blkio controller policy registration */
-int blkio_policy_register(struct blkio_policy_type *);
-void blkio_policy_unregister(struct blkio_policy_type *);
+int blkcg_policy_register(struct blkcg_policy *pol);
+void blkcg_policy_unregister(struct blkcg_policy *pol);
int blkcg_activate_policy(struct request_queue *q,
- const struct blkio_policy_type *pol);
+ const struct blkcg_policy *pol);
void blkcg_deactivate_policy(struct request_queue *q,
- const struct blkio_policy_type *pol);
+ const struct blkcg_policy *pol);
-void blkcg_print_blkgs(struct seq_file *sf, struct blkio_cgroup *blkcg,
+void blkcg_print_blkgs(struct seq_file *sf, struct blkcg *blkcg,
u64 (*prfill)(struct seq_file *, void *, int),
- const struct blkio_policy_type *pol, int data,
+ const struct blkcg_policy *pol, int data,
bool show_total);
u64 __blkg_prfill_u64(struct seq_file *sf, void *pdata, u64 v);
u64 __blkg_prfill_rwstat(struct seq_file *sf, void *pdata,
@@ -136,13 +136,12 @@ u64 blkg_prfill_rwstat(struct seq_file *sf, void *pdata, int off);
struct blkg_conf_ctx {
struct gendisk *disk;
- struct blkio_group *blkg;
+ struct blkcg_gq *blkg;
u64 v;
};
-int blkg_conf_prep(struct blkio_cgroup *blkcg,
- const struct blkio_policy_type *pol, const char *input,
- struct blkg_conf_ctx *ctx);
+int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
+ const char *input, struct blkg_conf_ctx *ctx);
void blkg_conf_finish(struct blkg_conf_ctx *ctx);
@@ -153,8 +152,8 @@ void blkg_conf_finish(struct blkg_conf_ctx *ctx);
*
* Return pointer to private data associated with the @blkg-@pol pair.
*/
-static inline void *blkg_to_pdata(struct blkio_group *blkg,
- struct blkio_policy_type *pol)
+static inline void *blkg_to_pdata(struct blkcg_gq *blkg,
+ struct blkcg_policy *pol)
{
return blkg ? blkg->pd[pol->plid]->pdata : NULL;
}
@@ -165,7 +164,7 @@ static inline void *blkg_to_pdata(struct blkio_group *blkg,
*
* @pdata is policy private data. Determine the blkg it's associated with.
*/
-static inline struct blkio_group *pdata_to_blkg(void *pdata)
+static inline struct blkcg_gq *pdata_to_blkg(void *pdata)
{
if (pdata) {
struct blkg_policy_data *pd =
@@ -183,7 +182,7 @@ static inline struct blkio_group *pdata_to_blkg(void *pdata)
*
* Format the path of the cgroup of @blkg into @buf.
*/
-static inline int blkg_path(struct blkio_group *blkg, char *buf, int buflen)
+static inline int blkg_path(struct blkcg_gq *blkg, char *buf, int buflen)
{
int ret;
@@ -201,14 +200,14 @@ static inline int blkg_path(struct blkio_group *blkg, char *buf, int buflen)
*
* The caller should be holding queue_lock and an existing reference.
*/
-static inline void blkg_get(struct blkio_group *blkg)
+static inline void blkg_get(struct blkcg_gq *blkg)
{
lockdep_assert_held(blkg->q->queue_lock);
WARN_ON_ONCE(!blkg->refcnt);
blkg->refcnt++;
}
-void __blkg_release(struct blkio_group *blkg);
+void __blkg_release(struct blkcg_gq *blkg);
/**
* blkg_put - put a blkg reference
@@ -216,7 +215,7 @@ void __blkg_release(struct blkio_group *blkg);
*
* The caller should be holding queue_lock.
*/
-static inline void blkg_put(struct blkio_group *blkg)
+static inline void blkg_put(struct blkcg_gq *blkg)
{
lockdep_assert_held(blkg->q->queue_lock);
WARN_ON_ONCE(blkg->refcnt <= 0);
@@ -343,32 +342,32 @@ static inline void blkg_rwstat_reset(struct blkg_rwstat *rwstat)
struct cgroup;
-struct blkio_group {
+struct blkcg_gq {
};
-struct blkio_policy_type {
+struct blkcg_policy {
};
-static inline struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; }
-static inline struct blkio_cgroup *bio_blkio_cgroup(struct bio *bio) { return NULL; }
-static inline struct blkio_group *blkg_lookup(struct blkio_cgroup *blkcg, void *key) { return NULL; }
+static inline struct blkcg *cgroup_to_blkcg(struct cgroup *cgroup) { return NULL; }
+static inline struct blkcg *bio_blkcg(struct bio *bio) { return NULL; }
+static inline struct blkcg_gq *blkg_lookup(struct blkcg *blkcg, void *key) { return NULL; }
static inline int blkcg_init_queue(struct request_queue *q) { return 0; }
static inline void blkcg_drain_queue(struct request_queue *q) { }
static inline void blkcg_exit_queue(struct request_queue *q) { }
-static inline int blkio_policy_register(struct blkio_policy_type *blkiop) { return 0; }
-static inline void blkio_policy_unregister(struct blkio_policy_type *blkiop) { }
+static inline int blkcg_policy_register(struct blkcg_policy *pol) { return 0; }
+static inline void blkcg_policy_unregister(struct blkcg_policy *pol) { }
static inline int blkcg_activate_policy(struct request_queue *q,
- const struct blkio_policy_type *pol) { return 0; }
+ const struct blkcg_policy *pol) { return 0; }
static inline void blkcg_deactivate_policy(struct request_queue *q,
- const struct blkio_policy_type *pol) { }
-
-static inline void *blkg_to_pdata(struct blkio_group *blkg,
- struct blkio_policy_type *pol) { return NULL; }
-static inline struct blkio_group *pdata_to_blkg(void *pdata,
- struct blkio_policy_type *pol) { return NULL; }
-static inline char *blkg_path(struct blkio_group *blkg) { return NULL; }
-static inline void blkg_get(struct blkio_group *blkg) { }
-static inline void blkg_put(struct blkio_group *blkg) { }
+ const struct blkcg_policy *pol) { }
+
+static inline void *blkg_to_pdata(struct blkcg_gq *blkg,
+ struct blkcg_policy *pol) { return NULL; }
+static inline struct blkcg_gq *pdata_to_blkg(void *pdata,
+ struct blkcg_policy *pol) { return NULL; }
+static inline char *blkg_path(struct blkcg_gq *blkg) { return NULL; }
+static inline void blkg_get(struct blkcg_gq *blkg) { }
+static inline void blkg_put(struct blkcg_gq *blkg) { }
#endif /* CONFIG_BLK_CGROUP */
#endif /* _BLK_CGROUP_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.