2009-12-03 17:59:42 +00:00
|
|
|
#ifndef _BLK_CGROUP_H
|
|
|
|
#define _BLK_CGROUP_H
|
|
|
|
/*
|
|
|
|
* Common Block IO controller cgroup interface
|
|
|
|
*
|
|
|
|
* Based on ideas and code from CFQ, CFS and BFQ:
|
|
|
|
* Copyright (C) 2003 Jens Axboe <axboe@kernel.dk>
|
|
|
|
*
|
|
|
|
* Copyright (C) 2008 Fabio Checconi <fabio@gandalf.sssup.it>
|
|
|
|
* Paolo Valente <paolo.valente@unimore.it>
|
|
|
|
*
|
|
|
|
* Copyright (C) 2009 Vivek Goyal <vgoyal@redhat.com>
|
|
|
|
* Nauman Rafique <nauman@google.com>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/cgroup.h>
|
2011-05-19 19:38:29 +00:00
|
|
|
#include <linux/u64_stats_sync.h>
|
2009-12-03 17:59:42 +00:00
|
|
|
|
2010-09-15 21:06:33 +00:00
|
|
|
enum blkio_policy_id {
|
|
|
|
BLKIO_POLICY_PROP = 0, /* Proportional Bandwidth division */
|
2010-09-15 21:06:34 +00:00
|
|
|
BLKIO_POLICY_THROTL, /* Throttling */
|
2012-03-05 21:15:04 +00:00
|
|
|
|
|
|
|
BLKIO_NR_POLICIES,
|
2010-09-15 21:06:33 +00:00
|
|
|
};
|
|
|
|
|
2010-10-01 19:16:41 +00:00
|
|
|
/* Max limits for throttle policy */
|
|
|
|
#define THROTL_IOPS_MAX UINT_MAX
|
|
|
|
|
2012-03-05 21:14:54 +00:00
|
|
|
#ifdef CONFIG_BLK_CGROUP
|
2009-12-03 20:06:43 +00:00
|
|
|
|
2010-04-09 06:31:19 +00:00
|
|
|
enum stat_type {
|
|
|
|
/* Total time spent (in ns) between request dispatch to the driver and
|
|
|
|
* request completion for IOs doen by this cgroup. This may not be
|
|
|
|
* accurate when NCQ is turned on. */
|
|
|
|
BLKIO_STAT_SERVICE_TIME = 0,
|
|
|
|
/* Total time spent waiting in scheduler queue in ns */
|
|
|
|
BLKIO_STAT_WAIT_TIME,
|
2010-04-09 04:15:10 +00:00
|
|
|
/* Number of IOs queued up */
|
|
|
|
BLKIO_STAT_QUEUED,
|
2010-04-09 06:31:19 +00:00
|
|
|
/* All the single valued stats go below this */
|
|
|
|
BLKIO_STAT_TIME,
|
2011-05-19 19:38:20 +00:00
|
|
|
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
2011-03-12 15:54:00 +00:00
|
|
|
/* Time not charged to this cgroup */
|
|
|
|
BLKIO_STAT_UNACCOUNTED_TIME,
|
2010-04-09 04:15:10 +00:00
|
|
|
BLKIO_STAT_AVG_QUEUE_SIZE,
|
2010-04-09 04:15:35 +00:00
|
|
|
BLKIO_STAT_IDLE_TIME,
|
|
|
|
BLKIO_STAT_EMPTY_TIME,
|
|
|
|
BLKIO_STAT_GROUP_WAIT_TIME,
|
2010-04-09 06:31:19 +00:00
|
|
|
BLKIO_STAT_DEQUEUE
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
2011-05-19 19:38:28 +00:00
|
|
|
/* Per cpu stats */
|
|
|
|
enum stat_type_cpu {
|
|
|
|
BLKIO_STAT_CPU_SECTORS,
|
|
|
|
/* Total bytes transferred */
|
|
|
|
BLKIO_STAT_CPU_SERVICE_BYTES,
|
|
|
|
/* Total IOs serviced, post merge */
|
|
|
|
BLKIO_STAT_CPU_SERVICED,
|
2011-05-23 08:02:19 +00:00
|
|
|
/* Number of IOs merged */
|
|
|
|
BLKIO_STAT_CPU_MERGED,
|
2011-05-19 19:38:28 +00:00
|
|
|
BLKIO_STAT_CPU_NR
|
|
|
|
};
|
|
|
|
|
2010-04-09 06:31:19 +00:00
|
|
|
enum stat_sub_type {
|
|
|
|
BLKIO_STAT_READ = 0,
|
|
|
|
BLKIO_STAT_WRITE,
|
|
|
|
BLKIO_STAT_SYNC,
|
|
|
|
BLKIO_STAT_ASYNC,
|
|
|
|
BLKIO_STAT_TOTAL
|
2010-04-01 22:01:24 +00:00
|
|
|
};
|
|
|
|
|
2010-04-09 04:15:35 +00:00
|
|
|
/* blkg state flags */
|
|
|
|
enum blkg_state_flags {
|
|
|
|
BLKG_waiting = 0,
|
|
|
|
BLKG_idling,
|
|
|
|
BLKG_empty,
|
|
|
|
};
|
|
|
|
|
2010-09-15 21:06:33 +00:00
|
|
|
/* cgroup files owned by proportional weight policy */
|
|
|
|
enum blkcg_file_name_prop {
|
|
|
|
BLKIO_PROP_weight = 1,
|
|
|
|
BLKIO_PROP_weight_device,
|
|
|
|
BLKIO_PROP_io_service_bytes,
|
|
|
|
BLKIO_PROP_io_serviced,
|
|
|
|
BLKIO_PROP_time,
|
|
|
|
BLKIO_PROP_sectors,
|
2011-03-12 15:54:00 +00:00
|
|
|
BLKIO_PROP_unaccounted_time,
|
2010-09-15 21:06:33 +00:00
|
|
|
BLKIO_PROP_io_service_time,
|
|
|
|
BLKIO_PROP_io_wait_time,
|
|
|
|
BLKIO_PROP_io_merged,
|
|
|
|
BLKIO_PROP_io_queued,
|
|
|
|
BLKIO_PROP_avg_queue_size,
|
|
|
|
BLKIO_PROP_group_wait_time,
|
|
|
|
BLKIO_PROP_idle_time,
|
|
|
|
BLKIO_PROP_empty_time,
|
|
|
|
BLKIO_PROP_dequeue,
|
|
|
|
};
|
|
|
|
|
2010-09-15 21:06:34 +00:00
|
|
|
/* cgroup files owned by throttle policy */
|
|
|
|
enum blkcg_file_name_throtl {
|
|
|
|
BLKIO_THROTL_read_bps_device,
|
|
|
|
BLKIO_THROTL_write_bps_device,
|
2010-09-15 21:06:36 +00:00
|
|
|
BLKIO_THROTL_read_iops_device,
|
|
|
|
BLKIO_THROTL_write_iops_device,
|
2010-09-15 21:06:34 +00:00
|
|
|
BLKIO_THROTL_io_service_bytes,
|
|
|
|
BLKIO_THROTL_io_serviced,
|
|
|
|
};
|
|
|
|
|
2009-12-03 17:59:42 +00:00
|
|
|
struct blkio_cgroup {
|
|
|
|
struct cgroup_subsys_state css;
|
|
|
|
unsigned int weight;
|
|
|
|
spinlock_t lock;
|
|
|
|
struct hlist_head blkg_list;
|
|
|
|
};
|
|
|
|
|
2010-04-01 22:01:24 +00:00
|
|
|
struct blkio_group_stats {
|
|
|
|
/* total disk time and nr sectors dispatched by this group */
|
|
|
|
uint64_t time;
|
2010-04-09 04:15:10 +00:00
|
|
|
uint64_t stat_arr[BLKIO_STAT_QUEUED + 1][BLKIO_STAT_TOTAL];
|
2010-04-01 22:01:24 +00:00
|
|
|
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
2011-05-19 19:38:20 +00:00
|
|
|
/* Time not charged to this cgroup */
|
|
|
|
uint64_t unaccounted_time;
|
|
|
|
|
2010-04-09 04:15:10 +00:00
|
|
|
/* Sum of number of IOs queued across all samples */
|
|
|
|
uint64_t avg_queue_size_sum;
|
|
|
|
/* Count of samples taken for average */
|
|
|
|
uint64_t avg_queue_size_samples;
|
2010-04-01 22:01:24 +00:00
|
|
|
/* How many times this group has been removed from service tree */
|
|
|
|
unsigned long dequeue;
|
2010-04-09 04:15:35 +00:00
|
|
|
|
|
|
|
/* Total time spent waiting for it to be assigned a timeslice. */
|
|
|
|
uint64_t group_wait_time;
|
|
|
|
uint64_t start_group_wait_time;
|
|
|
|
|
|
|
|
/* Time spent idling for this blkio_group */
|
|
|
|
uint64_t idle_time;
|
|
|
|
uint64_t start_idle_time;
|
|
|
|
/*
|
|
|
|
* Total time when we have requests queued and do not contain the
|
|
|
|
* current active queue.
|
|
|
|
*/
|
|
|
|
uint64_t empty_time;
|
|
|
|
uint64_t start_empty_time;
|
|
|
|
uint16_t flags;
|
2010-04-01 22:01:24 +00:00
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
2011-05-19 19:38:28 +00:00
|
|
|
/* Per cpu blkio group stats */
|
|
|
|
struct blkio_group_stats_cpu {
|
|
|
|
uint64_t sectors;
|
|
|
|
uint64_t stat_arr_cpu[BLKIO_STAT_CPU_NR][BLKIO_STAT_TOTAL];
|
2011-05-19 19:38:29 +00:00
|
|
|
struct u64_stats_sync syncp;
|
2011-05-19 19:38:28 +00:00
|
|
|
};
|
|
|
|
|
2012-03-05 21:15:07 +00:00
|
|
|
struct blkio_group_conf {
|
|
|
|
unsigned int weight;
|
|
|
|
unsigned int iops[2];
|
|
|
|
u64 bps[2];
|
|
|
|
};
|
|
|
|
|
2012-03-05 21:15:14 +00:00
|
|
|
/* per-blkg per-policy data */
|
|
|
|
struct blkg_policy_data {
|
|
|
|
/* the blkg this per-policy data belongs to */
|
|
|
|
struct blkio_group *blkg;
|
|
|
|
|
2012-03-05 21:15:16 +00:00
|
|
|
/* Configuration */
|
|
|
|
struct blkio_group_conf conf;
|
|
|
|
|
|
|
|
struct blkio_group_stats stats;
|
|
|
|
/* Per cpu stats pointer */
|
|
|
|
struct blkio_group_stats_cpu __percpu *stats_cpu;
|
|
|
|
|
2012-03-05 21:15:14 +00:00
|
|
|
/* pol->pdata_size bytes of private data used by policy impl */
|
|
|
|
char pdata[] __aligned(__alignof__(unsigned long long));
|
|
|
|
};
|
|
|
|
|
2009-12-03 17:59:42 +00:00
|
|
|
struct blkio_group {
|
2012-03-05 21:15:03 +00:00
|
|
|
/* Pointer to the associated request_queue, RCU protected */
|
|
|
|
struct request_queue __rcu *q;
|
2012-03-05 21:15:20 +00:00
|
|
|
struct list_head q_node;
|
2009-12-03 17:59:42 +00:00
|
|
|
struct hlist_node blkcg_node;
|
2012-03-05 21:15:11 +00:00
|
|
|
struct blkio_cgroup *blkcg;
|
2009-12-03 17:59:48 +00:00
|
|
|
/* Store cgroup path */
|
|
|
|
char path[128];
|
2012-03-05 21:15:15 +00:00
|
|
|
/* reference count */
|
|
|
|
int refcnt;
|
2009-12-03 17:59:49 +00:00
|
|
|
|
2010-04-01 22:01:24 +00:00
|
|
|
/* Need to serialize the stats in the case of reset/update */
|
|
|
|
spinlock_t stats_lock;
|
2012-03-05 21:15:16 +00:00
|
|
|
struct blkg_policy_data *pd[BLKIO_NR_POLICIES];
|
2012-03-05 21:15:15 +00:00
|
|
|
|
|
|
|
struct rcu_head rcu_head;
|
2009-12-03 17:59:42 +00:00
|
|
|
};
|
|
|
|
|
2012-03-05 21:15:14 +00:00
|
|
|
typedef void (blkio_init_group_fn)(struct blkio_group *blkg);
|
2012-03-05 21:15:03 +00:00
|
|
|
typedef void (blkio_update_group_weight_fn)(struct request_queue *q,
|
2010-10-01 12:49:49 +00:00
|
|
|
struct blkio_group *blkg, unsigned int weight);
|
2012-03-05 21:15:03 +00:00
|
|
|
typedef void (blkio_update_group_read_bps_fn)(struct request_queue *q,
|
2010-10-01 12:49:49 +00:00
|
|
|
struct blkio_group *blkg, u64 read_bps);
|
2012-03-05 21:15:03 +00:00
|
|
|
typedef void (blkio_update_group_write_bps_fn)(struct request_queue *q,
|
2010-10-01 12:49:49 +00:00
|
|
|
struct blkio_group *blkg, u64 write_bps);
|
2012-03-05 21:15:03 +00:00
|
|
|
typedef void (blkio_update_group_read_iops_fn)(struct request_queue *q,
|
2010-10-01 12:49:49 +00:00
|
|
|
struct blkio_group *blkg, unsigned int read_iops);
|
2012-03-05 21:15:03 +00:00
|
|
|
typedef void (blkio_update_group_write_iops_fn)(struct request_queue *q,
|
2010-10-01 12:49:49 +00:00
|
|
|
struct blkio_group *blkg, unsigned int write_iops);
|
2009-12-04 15:36:42 +00:00
|
|
|
|
|
|
|
struct blkio_policy_ops {
|
2012-03-05 21:15:14 +00:00
|
|
|
blkio_init_group_fn *blkio_init_group_fn;
|
2009-12-04 15:36:42 +00:00
|
|
|
blkio_update_group_weight_fn *blkio_update_group_weight_fn;
|
2010-09-15 21:06:34 +00:00
|
|
|
blkio_update_group_read_bps_fn *blkio_update_group_read_bps_fn;
|
|
|
|
blkio_update_group_write_bps_fn *blkio_update_group_write_bps_fn;
|
2010-09-15 21:06:36 +00:00
|
|
|
blkio_update_group_read_iops_fn *blkio_update_group_read_iops_fn;
|
|
|
|
blkio_update_group_write_iops_fn *blkio_update_group_write_iops_fn;
|
2009-12-04 15:36:42 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
struct blkio_policy_type {
|
|
|
|
struct list_head list;
|
|
|
|
struct blkio_policy_ops ops;
|
2010-09-15 21:06:33 +00:00
|
|
|
enum blkio_policy_id plid;
|
2012-03-05 21:15:14 +00:00
|
|
|
size_t pdata_size; /* policy specific private data size */
|
2009-12-04 15:36:42 +00:00
|
|
|
};
|
|
|
|
|
2012-03-05 21:15:12 +00:00
|
|
|
extern int blkcg_init_queue(struct request_queue *q);
|
|
|
|
extern void blkcg_drain_queue(struct request_queue *q);
|
|
|
|
extern void blkcg_exit_queue(struct request_queue *q);
|
|
|
|
|
2009-12-04 15:36:42 +00:00
|
|
|
/* Blkio controller policy registration */
|
|
|
|
extern void blkio_policy_register(struct blkio_policy_type *);
|
|
|
|
extern void blkio_policy_unregister(struct blkio_policy_type *);
|
2012-03-05 21:15:20 +00:00
|
|
|
extern void blkg_destroy_all(struct request_queue *q, bool destroy_root);
|
|
|
|
extern void update_root_blkg_pd(struct request_queue *q,
|
|
|
|
enum blkio_policy_id plid);
|
2009-12-04 15:36:42 +00:00
|
|
|
|
2012-03-05 21:15:14 +00:00
|
|
|
/**
|
|
|
|
* blkg_to_pdata - get policy private data
|
|
|
|
* @blkg: blkg of interest
|
|
|
|
* @pol: policy of interest
|
|
|
|
*
|
|
|
|
* 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)
|
|
|
|
{
|
2012-03-05 21:15:16 +00:00
|
|
|
return blkg ? blkg->pd[pol->plid]->pdata : NULL;
|
2012-03-05 21:15:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pdata_to_blkg - get blkg associated with policy private data
|
|
|
|
* @pdata: policy private data of interest
|
|
|
|
* @pol: policy @pdata is for
|
|
|
|
*
|
|
|
|
* @pdata is policy private data for @pol. Determine the blkg it's
|
|
|
|
* associated with.
|
|
|
|
*/
|
|
|
|
static inline struct blkio_group *pdata_to_blkg(void *pdata,
|
|
|
|
struct blkio_policy_type *pol)
|
|
|
|
{
|
|
|
|
if (pdata) {
|
|
|
|
struct blkg_policy_data *pd =
|
|
|
|
container_of(pdata, struct blkg_policy_data, pdata);
|
|
|
|
return pd->blkg;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2010-04-26 17:27:56 +00:00
|
|
|
static inline char *blkg_path(struct blkio_group *blkg)
|
|
|
|
{
|
|
|
|
return blkg->path;
|
|
|
|
}
|
|
|
|
|
2012-03-05 21:15:15 +00:00
|
|
|
/**
|
|
|
|
* blkg_get - get a blkg reference
|
|
|
|
* @blkg: blkg to get
|
|
|
|
*
|
|
|
|
* The caller should be holding queue_lock and an existing reference.
|
|
|
|
*/
|
|
|
|
static inline void blkg_get(struct blkio_group *blkg)
|
|
|
|
{
|
|
|
|
lockdep_assert_held(blkg->q->queue_lock);
|
|
|
|
WARN_ON_ONCE(!blkg->refcnt);
|
|
|
|
blkg->refcnt++;
|
|
|
|
}
|
|
|
|
|
|
|
|
void __blkg_release(struct blkio_group *blkg);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* blkg_put - put a blkg reference
|
|
|
|
* @blkg: blkg to put
|
|
|
|
*
|
|
|
|
* The caller should be holding queue_lock.
|
|
|
|
*/
|
|
|
|
static inline void blkg_put(struct blkio_group *blkg)
|
|
|
|
{
|
|
|
|
lockdep_assert_held(blkg->q->queue_lock);
|
|
|
|
WARN_ON_ONCE(blkg->refcnt <= 0);
|
|
|
|
if (!--blkg->refcnt)
|
|
|
|
__blkg_release(blkg);
|
|
|
|
}
|
|
|
|
|
2009-12-03 20:06:43 +00:00
|
|
|
#else
|
|
|
|
|
|
|
|
struct blkio_group {
|
|
|
|
};
|
|
|
|
|
2009-12-04 15:36:42 +00:00
|
|
|
struct blkio_policy_type {
|
|
|
|
};
|
|
|
|
|
2012-03-05 21:15:12 +00:00
|
|
|
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) { }
|
2009-12-04 15:36:42 +00:00
|
|
|
static inline void blkio_policy_register(struct blkio_policy_type *blkiop) { }
|
|
|
|
static inline void blkio_policy_unregister(struct blkio_policy_type *blkiop) { }
|
2012-03-05 21:15:19 +00:00
|
|
|
static inline void blkg_destroy_all(struct request_queue *q,
|
|
|
|
bool destory_root) { }
|
2012-03-05 21:15:20 +00:00
|
|
|
static inline void update_root_blkg_pd(struct request_queue *q,
|
|
|
|
enum blkio_policy_id plid) { }
|
2009-12-04 15:36:42 +00:00
|
|
|
|
2012-03-05 21:15:14 +00:00
|
|
|
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; }
|
2010-04-26 17:27:56 +00:00
|
|
|
static inline char *blkg_path(struct blkio_group *blkg) { return NULL; }
|
2012-03-05 21:15:15 +00:00
|
|
|
static inline void blkg_get(struct blkio_group *blkg) { }
|
|
|
|
static inline void blkg_put(struct blkio_group *blkg) { }
|
2010-04-26 17:27:56 +00:00
|
|
|
|
2009-12-03 20:06:43 +00:00
|
|
|
#endif
|
|
|
|
|
2011-03-08 18:45:00 +00:00
|
|
|
#define BLKIO_WEIGHT_MIN 10
|
2009-12-03 17:59:42 +00:00
|
|
|
#define BLKIO_WEIGHT_MAX 1000
|
|
|
|
#define BLKIO_WEIGHT_DEFAULT 500
|
|
|
|
|
2009-12-03 17:59:48 +00:00
|
|
|
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
2012-03-05 21:15:17 +00:00
|
|
|
void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol);
|
2010-04-01 22:01:41 +00:00
|
|
|
void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol,
|
|
|
|
unsigned long dequeue);
|
|
|
|
void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol);
|
|
|
|
void blkiocg_update_idle_time_stats(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol);
|
|
|
|
void blkiocg_set_start_empty_time(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol);
|
2010-04-09 04:15:35 +00:00
|
|
|
|
|
|
|
#define BLKG_FLAG_FNS(name) \
|
|
|
|
static inline void blkio_mark_blkg_##name( \
|
|
|
|
struct blkio_group_stats *stats) \
|
|
|
|
{ \
|
|
|
|
stats->flags |= (1 << BLKG_##name); \
|
|
|
|
} \
|
|
|
|
static inline void blkio_clear_blkg_##name( \
|
|
|
|
struct blkio_group_stats *stats) \
|
|
|
|
{ \
|
|
|
|
stats->flags &= ~(1 << BLKG_##name); \
|
|
|
|
} \
|
|
|
|
static inline int blkio_blkg_##name(struct blkio_group_stats *stats) \
|
|
|
|
{ \
|
|
|
|
return (stats->flags & (1 << BLKG_##name)) != 0; \
|
|
|
|
} \
|
|
|
|
|
|
|
|
BLKG_FLAG_FNS(waiting)
|
|
|
|
BLKG_FLAG_FNS(idling)
|
|
|
|
BLKG_FLAG_FNS(empty)
|
|
|
|
#undef BLKG_FLAG_FNS
|
2009-12-03 17:59:48 +00:00
|
|
|
#else
|
2012-03-05 21:15:17 +00:00
|
|
|
static inline void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol) { }
|
2010-04-01 22:01:41 +00:00
|
|
|
static inline void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol, unsigned long dequeue) { }
|
|
|
|
static inline void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol) { }
|
|
|
|
static inline void blkiocg_update_idle_time_stats(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol) { }
|
|
|
|
static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol) { }
|
2009-12-03 17:59:48 +00:00
|
|
|
#endif
|
|
|
|
|
2012-03-05 21:14:54 +00:00
|
|
|
#ifdef CONFIG_BLK_CGROUP
|
2009-12-03 17:59:42 +00:00
|
|
|
extern struct blkio_cgroup blkio_root_cgroup;
|
|
|
|
extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup);
|
2011-05-16 13:24:08 +00:00
|
|
|
extern struct blkio_cgroup *task_blkio_cgroup(struct task_struct *tsk);
|
2009-12-03 17:59:42 +00:00
|
|
|
extern int blkiocg_del_blkio_group(struct blkio_group *blkg);
|
2012-03-05 21:15:06 +00:00
|
|
|
extern struct blkio_group *blkg_lookup(struct blkio_cgroup *blkcg,
|
2012-03-05 21:15:20 +00:00
|
|
|
struct request_queue *q);
|
2012-03-05 21:15:06 +00:00
|
|
|
struct blkio_group *blkg_lookup_create(struct blkio_cgroup *blkcg,
|
|
|
|
struct request_queue *q,
|
|
|
|
enum blkio_policy_id plid,
|
|
|
|
bool for_root);
|
2010-04-01 22:01:24 +00:00
|
|
|
void blkiocg_update_timeslice_used(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol,
|
|
|
|
unsigned long time,
|
|
|
|
unsigned long unaccounted_time);
|
|
|
|
void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol,
|
|
|
|
uint64_t bytes, bool direction, bool sync);
|
2010-04-09 06:31:19 +00:00
|
|
|
void blkiocg_update_completion_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol,
|
|
|
|
uint64_t start_time,
|
|
|
|
uint64_t io_start_time, bool direction,
|
|
|
|
bool sync);
|
|
|
|
void blkiocg_update_io_merged_stats(struct blkio_group *blkg,
|
|
|
|
struct blkio_policy_type *pol,
|
|
|
|
bool direction, bool sync);
|
2010-04-13 17:59:17 +00:00
|
|
|
void blkiocg_update_io_add_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol,
|
|
|
|
struct blkio_group *curr_blkg, bool direction,
|
|
|
|
bool sync);
|
2010-04-13 17:59:17 +00:00
|
|
|
void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol,
|
|
|
|
bool direction, bool sync);
|
2009-12-03 17:59:42 +00:00
|
|
|
#else
|
2009-12-03 20:06:43 +00:00
|
|
|
struct cgroup;
|
2009-12-03 17:59:42 +00:00
|
|
|
static inline struct blkio_cgroup *
|
|
|
|
cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; }
|
2011-05-16 13:24:08 +00:00
|
|
|
static inline struct blkio_cgroup *
|
|
|
|
task_blkio_cgroup(struct task_struct *tsk) { return NULL; }
|
2009-12-03 17:59:42 +00:00
|
|
|
|
|
|
|
static inline int
|
|
|
|
blkiocg_del_blkio_group(struct blkio_group *blkg) { return 0; }
|
|
|
|
|
2012-03-05 21:15:06 +00:00
|
|
|
static inline struct blkio_group *blkg_lookup(struct blkio_cgroup *blkcg,
|
|
|
|
void *key) { return NULL; }
|
2010-04-01 22:01:24 +00:00
|
|
|
static inline void blkiocg_update_timeslice_used(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol, unsigned long time,
|
|
|
|
unsigned long unaccounted_time) { }
|
2010-04-09 06:31:19 +00:00
|
|
|
static inline void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol, uint64_t bytes,
|
|
|
|
bool direction, bool sync) { }
|
2010-04-09 06:31:19 +00:00
|
|
|
static inline void blkiocg_update_completion_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol, uint64_t start_time,
|
|
|
|
uint64_t io_start_time, bool direction, bool sync) { }
|
2010-04-09 04:14:23 +00:00
|
|
|
static inline void blkiocg_update_io_merged_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol, bool direction,
|
|
|
|
bool sync) { }
|
2010-04-13 17:59:17 +00:00
|
|
|
static inline void blkiocg_update_io_add_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol,
|
|
|
|
struct blkio_group *curr_blkg, bool direction,
|
|
|
|
bool sync) { }
|
2010-04-13 17:59:17 +00:00
|
|
|
static inline void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
|
2012-03-05 21:15:17 +00:00
|
|
|
struct blkio_policy_type *pol, bool direction,
|
|
|
|
bool sync) { }
|
2009-12-03 17:59:42 +00:00
|
|
|
#endif
|
|
|
|
#endif /* _BLK_CGROUP_H */
|