Blame view
block/blk-cgroup.h
10.4 KB
31e4c28d9 blkio: Introduce ... |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
#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> |
062a644d6 blk-cgroup: Prepa... |
17 18 |
enum blkio_policy_id { BLKIO_POLICY_PROP = 0, /* Proportional Bandwidth division */ |
4c9eefa16 blk-cgroup: Intro... |
19 |
BLKIO_POLICY_THROTL, /* Throttling */ |
062a644d6 blk-cgroup: Prepa... |
20 |
}; |
9355aede5 blkio-throttle: l... |
21 22 |
/* Max limits for throttle policy */ #define THROTL_IOPS_MAX UINT_MAX |
67523c48a cgroups: blkio su... |
23 24 25 26 27 28 29 |
#if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE) #ifndef CONFIG_BLK_CGROUP /* When blk-cgroup is a module, its subsys_id isn't a compile-time constant */ extern struct cgroup_subsys blkio_subsys; #define blkio_subsys_id blkio_subsys.subsys_id #endif |
2f5ea4771 cfq-iosched: fix ... |
30 |
|
84c124da9 blkio: Changes to... |
31 32 33 34 35 36 37 38 39 40 41 |
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 bytes transferred */ BLKIO_STAT_SERVICE_BYTES, /* Total IOs serviced, post merge */ BLKIO_STAT_SERVICED, /* Total time spent waiting in scheduler queue in ns */ BLKIO_STAT_WAIT_TIME, |
812d40264 blkio: Add io_mer... |
42 43 |
/* Number of IOs merged */ BLKIO_STAT_MERGED, |
cdc1184cf blkio: Add io_que... |
44 45 |
/* Number of IOs queued up */ BLKIO_STAT_QUEUED, |
84c124da9 blkio: Changes to... |
46 47 48 49 |
/* All the single valued stats go below this */ BLKIO_STAT_TIME, BLKIO_STAT_SECTORS, #ifdef CONFIG_DEBUG_BLK_CGROUP |
cdc1184cf blkio: Add io_que... |
50 |
BLKIO_STAT_AVG_QUEUE_SIZE, |
812df48d1 blkio: Add more d... |
51 52 53 |
BLKIO_STAT_IDLE_TIME, BLKIO_STAT_EMPTY_TIME, BLKIO_STAT_GROUP_WAIT_TIME, |
84c124da9 blkio: Changes to... |
54 55 56 57 58 59 60 61 62 63 |
BLKIO_STAT_DEQUEUE #endif }; enum stat_sub_type { BLKIO_STAT_READ = 0, BLKIO_STAT_WRITE, BLKIO_STAT_SYNC, BLKIO_STAT_ASYNC, BLKIO_STAT_TOTAL |
303a3acb2 blkio: Add io con... |
64 |
}; |
812df48d1 blkio: Add more d... |
65 66 67 68 69 70 |
/* blkg state flags */ enum blkg_state_flags { BLKG_waiting = 0, BLKG_idling, BLKG_empty, }; |
062a644d6 blk-cgroup: Prepa... |
71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 |
/* 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, 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, }; |
4c9eefa16 blk-cgroup: Intro... |
89 90 91 92 |
/* cgroup files owned by throttle policy */ enum blkcg_file_name_throtl { BLKIO_THROTL_read_bps_device, BLKIO_THROTL_write_bps_device, |
7702e8f45 blk-cgroup: cgrou... |
93 94 |
BLKIO_THROTL_read_iops_device, BLKIO_THROTL_write_iops_device, |
4c9eefa16 blk-cgroup: Intro... |
95 96 97 |
BLKIO_THROTL_io_service_bytes, BLKIO_THROTL_io_serviced, }; |
31e4c28d9 blkio: Introduce ... |
98 99 100 101 102 |
struct blkio_cgroup { struct cgroup_subsys_state css; unsigned int weight; spinlock_t lock; struct hlist_head blkg_list; |
34d0f179d io-controller: Ad... |
103 |
struct list_head policy_list; /* list of blkio_policy_node */ |
31e4c28d9 blkio: Introduce ... |
104 |
}; |
303a3acb2 blkio: Add io con... |
105 106 107 108 |
struct blkio_group_stats { /* total disk time and nr sectors dispatched by this group */ uint64_t time; uint64_t sectors; |
cdc1184cf blkio: Add io_que... |
109 |
uint64_t stat_arr[BLKIO_STAT_QUEUED + 1][BLKIO_STAT_TOTAL]; |
303a3acb2 blkio: Add io con... |
110 |
#ifdef CONFIG_DEBUG_BLK_CGROUP |
cdc1184cf blkio: Add io_que... |
111 112 113 114 |
/* 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; |
303a3acb2 blkio: Add io con... |
115 116 |
/* How many times this group has been removed from service tree */ unsigned long dequeue; |
812df48d1 blkio: Add more d... |
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 |
/* 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; |
303a3acb2 blkio: Add io con... |
132 133 |
#endif }; |
31e4c28d9 blkio: Introduce ... |
134 135 136 137 |
struct blkio_group { /* An rcu protected unique identifier for the group */ void *key; struct hlist_node blkcg_node; |
b1c357696 blkio: Take care ... |
138 |
unsigned short blkcg_id; |
2868ef7b3 blkio: Some debug... |
139 140 |
/* Store cgroup path */ char path[128]; |
220841906 blkio: Export dis... |
141 |
/* The device MKDEV(major, minor), this group has been created for */ |
84c124da9 blkio: Changes to... |
142 |
dev_t dev; |
062a644d6 blk-cgroup: Prepa... |
143 144 |
/* policy which owns this blk group */ enum blkio_policy_id plid; |
220841906 blkio: Export dis... |
145 |
|
303a3acb2 blkio: Add io con... |
146 147 148 |
/* Need to serialize the stats in the case of reset/update */ spinlock_t stats_lock; struct blkio_group_stats stats; |
31e4c28d9 blkio: Introduce ... |
149 |
}; |
34d0f179d io-controller: Ad... |
150 151 152 |
struct blkio_policy_node { struct list_head node; dev_t dev; |
062a644d6 blk-cgroup: Prepa... |
153 154 155 156 |
/* This node belongs to max bw policy or porportional weight policy */ enum blkio_policy_id plid; /* cgroup file to which this rule belongs to */ int fileid; |
4c9eefa16 blk-cgroup: Intro... |
157 158 159 160 161 162 163 164 165 |
union { unsigned int weight; /* * Rate read/write in terms of byptes per second * Whether this rate represents read or write is determined * by file type "fileid". */ u64 bps; |
7702e8f45 blk-cgroup: cgrou... |
166 |
unsigned int iops; |
4c9eefa16 blk-cgroup: Intro... |
167 |
} val; |
34d0f179d io-controller: Ad... |
168 169 170 171 |
}; extern unsigned int blkcg_get_weight(struct blkio_cgroup *blkcg, dev_t dev); |
4c9eefa16 blk-cgroup: Intro... |
172 173 174 175 |
extern uint64_t blkcg_get_read_bps(struct blkio_cgroup *blkcg, dev_t dev); extern uint64_t blkcg_get_write_bps(struct blkio_cgroup *blkcg, dev_t dev); |
7702e8f45 blk-cgroup: cgrou... |
176 177 178 179 |
extern unsigned int blkcg_get_read_iops(struct blkio_cgroup *blkcg, dev_t dev); extern unsigned int blkcg_get_write_iops(struct blkio_cgroup *blkcg, dev_t dev); |
34d0f179d io-controller: Ad... |
180 |
|
3e2520668 blkio: Implement ... |
181 |
typedef void (blkio_unlink_group_fn) (void *key, struct blkio_group *blkg); |
fe0714377 blkio: Recalculat... |
182 183 184 185 186 187 188 189 190 191 192 |
typedef void (blkio_update_group_weight_fn) (void *key, struct blkio_group *blkg, unsigned int weight); typedef void (blkio_update_group_read_bps_fn) (void * key, struct blkio_group *blkg, u64 read_bps); typedef void (blkio_update_group_write_bps_fn) (void *key, struct blkio_group *blkg, u64 write_bps); typedef void (blkio_update_group_read_iops_fn) (void *key, struct blkio_group *blkg, unsigned int read_iops); typedef void (blkio_update_group_write_iops_fn) (void *key, struct blkio_group *blkg, unsigned int write_iops); |
3e2520668 blkio: Implement ... |
193 194 195 196 |
struct blkio_policy_ops { blkio_unlink_group_fn *blkio_unlink_group_fn; blkio_update_group_weight_fn *blkio_update_group_weight_fn; |
4c9eefa16 blk-cgroup: Intro... |
197 198 |
blkio_update_group_read_bps_fn *blkio_update_group_read_bps_fn; blkio_update_group_write_bps_fn *blkio_update_group_write_bps_fn; |
7702e8f45 blk-cgroup: cgrou... |
199 200 |
blkio_update_group_read_iops_fn *blkio_update_group_read_iops_fn; blkio_update_group_write_iops_fn *blkio_update_group_write_iops_fn; |
3e2520668 blkio: Implement ... |
201 202 203 204 205 |
}; struct blkio_policy_type { struct list_head list; struct blkio_policy_ops ops; |
062a644d6 blk-cgroup: Prepa... |
206 |
enum blkio_policy_id plid; |
3e2520668 blkio: Implement ... |
207 208 209 210 211 |
}; /* Blkio controller policy registration */ extern void blkio_policy_register(struct blkio_policy_type *); extern void blkio_policy_unregister(struct blkio_policy_type *); |
afc24d49c blk-cgroup: confi... |
212 213 214 215 |
static inline char *blkg_path(struct blkio_group *blkg) { return blkg->path; } |
2f5ea4771 cfq-iosched: fix ... |
216 217 218 219 |
#else struct blkio_group { }; |
3e2520668 blkio: Implement ... |
220 221 222 223 224 |
struct blkio_policy_type { }; static inline void blkio_policy_register(struct blkio_policy_type *blkiop) { } static inline void blkio_policy_unregister(struct blkio_policy_type *blkiop) { } |
afc24d49c blk-cgroup: confi... |
225 |
static inline char *blkg_path(struct blkio_group *blkg) { return NULL; } |
2f5ea4771 cfq-iosched: fix ... |
226 |
#endif |
31e4c28d9 blkio: Introduce ... |
227 228 229 |
#define BLKIO_WEIGHT_MIN 100 #define BLKIO_WEIGHT_MAX 1000 #define BLKIO_WEIGHT_DEFAULT 500 |
2868ef7b3 blkio: Some debug... |
230 |
#ifdef CONFIG_DEBUG_BLK_CGROUP |
a11cdaa7a block: Update to ... |
231 |
void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg); |
9195291e5 blkio: Increment ... |
232 |
void blkiocg_update_dequeue_stats(struct blkio_group *blkg, |
220841906 blkio: Export dis... |
233 |
unsigned long dequeue); |
812df48d1 blkio: Add more d... |
234 235 |
void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg); void blkiocg_update_idle_time_stats(struct blkio_group *blkg); |
e5ff082e8 blkio: Fix anothe... |
236 |
void blkiocg_set_start_empty_time(struct blkio_group *blkg); |
812df48d1 blkio: Add more d... |
237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 |
#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 |
2868ef7b3 blkio: Some debug... |
258 |
#else |
a11cdaa7a block: Update to ... |
259 |
static inline void blkiocg_update_avg_queue_size_stats( |
cdc1184cf blkio: Add io_que... |
260 |
struct blkio_group *blkg) {} |
9195291e5 blkio: Increment ... |
261 262 |
static inline void blkiocg_update_dequeue_stats(struct blkio_group *blkg, unsigned long dequeue) {} |
812df48d1 blkio: Add more d... |
263 264 265 |
static inline void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg) {} static inline void blkiocg_update_idle_time_stats(struct blkio_group *blkg) {} |
e5ff082e8 blkio: Fix anothe... |
266 |
static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg) {} |
2868ef7b3 blkio: Some debug... |
267 |
#endif |
67523c48a cgroups: blkio su... |
268 |
#if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE) |
31e4c28d9 blkio: Introduce ... |
269 270 271 |
extern struct blkio_cgroup blkio_root_cgroup; extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup); extern void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, |
062a644d6 blk-cgroup: Prepa... |
272 273 |
struct blkio_group *blkg, void *key, dev_t dev, enum blkio_policy_id plid); |
31e4c28d9 blkio: Introduce ... |
274 275 276 |
extern int blkiocg_del_blkio_group(struct blkio_group *blkg); extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key); |
303a3acb2 blkio: Add io con... |
277 278 |
void blkiocg_update_timeslice_used(struct blkio_group *blkg, unsigned long time); |
84c124da9 blkio: Changes to... |
279 280 281 282 |
void blkiocg_update_dispatch_stats(struct blkio_group *blkg, uint64_t bytes, bool direction, bool sync); void blkiocg_update_completion_stats(struct blkio_group *blkg, uint64_t start_time, uint64_t io_start_time, bool direction, bool sync); |
812d40264 blkio: Add io_mer... |
283 284 |
void blkiocg_update_io_merged_stats(struct blkio_group *blkg, bool direction, bool sync); |
a11cdaa7a block: Update to ... |
285 |
void blkiocg_update_io_add_stats(struct blkio_group *blkg, |
cdc1184cf blkio: Add io_que... |
286 |
struct blkio_group *curr_blkg, bool direction, bool sync); |
a11cdaa7a block: Update to ... |
287 |
void blkiocg_update_io_remove_stats(struct blkio_group *blkg, |
cdc1184cf blkio: Add io_que... |
288 |
bool direction, bool sync); |
31e4c28d9 blkio: Introduce ... |
289 |
#else |
2f5ea4771 cfq-iosched: fix ... |
290 |
struct cgroup; |
31e4c28d9 blkio: Introduce ... |
291 292 293 294 |
static inline struct blkio_cgroup * cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; } static inline void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, |
062a644d6 blk-cgroup: Prepa... |
295 296 |
struct blkio_group *blkg, void *key, dev_t dev, enum blkio_policy_id plid) {} |
31e4c28d9 blkio: Introduce ... |
297 298 299 300 301 302 |
static inline int blkiocg_del_blkio_group(struct blkio_group *blkg) { return 0; } static inline struct blkio_group * blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key) { return NULL; } |
303a3acb2 blkio: Add io con... |
303 |
static inline void blkiocg_update_timeslice_used(struct blkio_group *blkg, |
9a0785b0d blkio: Remove per... |
304 |
unsigned long time) {} |
84c124da9 blkio: Changes to... |
305 306 307 308 309 |
static inline void blkiocg_update_dispatch_stats(struct blkio_group *blkg, uint64_t bytes, bool direction, bool sync) {} static inline void blkiocg_update_completion_stats(struct blkio_group *blkg, uint64_t start_time, uint64_t io_start_time, bool direction, bool sync) {} |
812d40264 blkio: Add io_mer... |
310 311 |
static inline void blkiocg_update_io_merged_stats(struct blkio_group *blkg, bool direction, bool sync) {} |
a11cdaa7a block: Update to ... |
312 |
static inline void blkiocg_update_io_add_stats(struct blkio_group *blkg, |
cdc1184cf blkio: Add io_que... |
313 |
struct blkio_group *curr_blkg, bool direction, bool sync) {} |
a11cdaa7a block: Update to ... |
314 |
static inline void blkiocg_update_io_remove_stats(struct blkio_group *blkg, |
cdc1184cf blkio: Add io_que... |
315 |
bool direction, bool sync) {} |
31e4c28d9 blkio: Introduce ... |
316 317 |
#endif #endif /* _BLK_CGROUP_H */ |