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31e4c28d VG |
1 | #ifndef _BLK_CGROUP_H |
2 | #define _BLK_CGROUP_H | |
3 | /* | |
4 | * Common Block IO controller cgroup interface | |
5 | * | |
6 | * Based on ideas and code from CFQ, CFS and BFQ: | |
7 | * Copyright (C) 2003 Jens Axboe <axboe@kernel.dk> | |
8 | * | |
9 | * Copyright (C) 2008 Fabio Checconi <fabio@gandalf.sssup.it> | |
10 | * Paolo Valente <paolo.valente@unimore.it> | |
11 | * | |
12 | * Copyright (C) 2009 Vivek Goyal <vgoyal@redhat.com> | |
13 | * Nauman Rafique <nauman@google.com> | |
14 | */ | |
15 | ||
16 | #include <linux/cgroup.h> | |
575969a0 | 17 | #include <linux/u64_stats_sync.h> |
31e4c28d | 18 | |
062a644d VG |
19 | enum blkio_policy_id { |
20 | BLKIO_POLICY_PROP = 0, /* Proportional Bandwidth division */ | |
4c9eefa1 | 21 | BLKIO_POLICY_THROTL, /* Throttling */ |
035d10b2 TH |
22 | |
23 | BLKIO_NR_POLICIES, | |
062a644d VG |
24 | }; |
25 | ||
9355aede VG |
26 | /* Max limits for throttle policy */ |
27 | #define THROTL_IOPS_MAX UINT_MAX | |
28 | ||
32e380ae | 29 | #ifdef CONFIG_BLK_CGROUP |
2f5ea477 | 30 | |
d3d32e69 TH |
31 | /* cft->private [un]packing for stat printing */ |
32 | #define BLKCG_STAT_PRIV(pol, off) (((unsigned)(pol) << 16) | (off)) | |
33 | #define BLKCG_STAT_POL(prv) ((unsigned)(prv) >> 16) | |
34 | #define BLKCG_STAT_OFF(prv) ((unsigned)(prv) & 0xffff) | |
2aa4a152 | 35 | |
edcb0722 TH |
36 | enum blkg_rwstat_type { |
37 | BLKG_RWSTAT_READ, | |
38 | BLKG_RWSTAT_WRITE, | |
39 | BLKG_RWSTAT_SYNC, | |
40 | BLKG_RWSTAT_ASYNC, | |
41 | ||
42 | BLKG_RWSTAT_NR, | |
43 | BLKG_RWSTAT_TOTAL = BLKG_RWSTAT_NR, | |
303a3acb DS |
44 | }; |
45 | ||
812df48d DS |
46 | /* blkg state flags */ |
47 | enum blkg_state_flags { | |
48 | BLKG_waiting = 0, | |
49 | BLKG_idling, | |
50 | BLKG_empty, | |
51 | }; | |
52 | ||
31e4c28d VG |
53 | struct blkio_cgroup { |
54 | struct cgroup_subsys_state css; | |
55 | unsigned int weight; | |
56 | spinlock_t lock; | |
57 | struct hlist_head blkg_list; | |
9a9e8a26 TH |
58 | |
59 | /* for policies to test whether associated blkcg has changed */ | |
60 | uint64_t id; | |
31e4c28d VG |
61 | }; |
62 | ||
edcb0722 TH |
63 | struct blkg_stat { |
64 | struct u64_stats_sync syncp; | |
65 | uint64_t cnt; | |
66 | }; | |
67 | ||
68 | struct blkg_rwstat { | |
69 | struct u64_stats_sync syncp; | |
70 | uint64_t cnt[BLKG_RWSTAT_NR]; | |
71 | }; | |
72 | ||
303a3acb | 73 | struct blkio_group_stats { |
edcb0722 TH |
74 | /* number of ios merged */ |
75 | struct blkg_rwstat merged; | |
76 | /* total time spent on device in ns, may not be accurate w/ queueing */ | |
77 | struct blkg_rwstat service_time; | |
78 | /* total time spent waiting in scheduler queue in ns */ | |
79 | struct blkg_rwstat wait_time; | |
80 | /* number of IOs queued up */ | |
81 | struct blkg_rwstat queued; | |
303a3acb | 82 | /* total disk time and nr sectors dispatched by this group */ |
edcb0722 | 83 | struct blkg_stat time; |
303a3acb | 84 | #ifdef CONFIG_DEBUG_BLK_CGROUP |
edcb0722 TH |
85 | /* time not charged to this cgroup */ |
86 | struct blkg_stat unaccounted_time; | |
87 | /* sum of number of ios queued across all samples */ | |
88 | struct blkg_stat avg_queue_size_sum; | |
89 | /* count of samples taken for average */ | |
90 | struct blkg_stat avg_queue_size_samples; | |
91 | /* how many times this group has been removed from service tree */ | |
92 | struct blkg_stat dequeue; | |
93 | /* total time spent waiting for it to be assigned a timeslice. */ | |
94 | struct blkg_stat group_wait_time; | |
95 | /* time spent idling for this blkio_group */ | |
96 | struct blkg_stat idle_time; | |
97 | /* total time with empty current active q with other requests queued */ | |
98 | struct blkg_stat empty_time; | |
997a026c | 99 | /* fields after this shouldn't be cleared on stat reset */ |
edcb0722 TH |
100 | uint64_t start_group_wait_time; |
101 | uint64_t start_idle_time; | |
102 | uint64_t start_empty_time; | |
103 | uint16_t flags; | |
303a3acb DS |
104 | #endif |
105 | }; | |
106 | ||
5624a4e4 VG |
107 | /* Per cpu blkio group stats */ |
108 | struct blkio_group_stats_cpu { | |
edcb0722 TH |
109 | /* total bytes transferred */ |
110 | struct blkg_rwstat service_bytes; | |
111 | /* total IOs serviced, post merge */ | |
112 | struct blkg_rwstat serviced; | |
113 | /* total sectors transferred */ | |
114 | struct blkg_stat sectors; | |
5624a4e4 VG |
115 | }; |
116 | ||
e56da7e2 TH |
117 | struct blkio_group_conf { |
118 | unsigned int weight; | |
c4682aec | 119 | u64 iops[2]; |
e56da7e2 TH |
120 | u64 bps[2]; |
121 | }; | |
122 | ||
0381411e TH |
123 | /* per-blkg per-policy data */ |
124 | struct blkg_policy_data { | |
125 | /* the blkg this per-policy data belongs to */ | |
126 | struct blkio_group *blkg; | |
127 | ||
549d3aa8 TH |
128 | /* Configuration */ |
129 | struct blkio_group_conf conf; | |
130 | ||
131 | struct blkio_group_stats stats; | |
132 | /* Per cpu stats pointer */ | |
133 | struct blkio_group_stats_cpu __percpu *stats_cpu; | |
134 | ||
0381411e TH |
135 | /* pol->pdata_size bytes of private data used by policy impl */ |
136 | char pdata[] __aligned(__alignof__(unsigned long long)); | |
137 | }; | |
138 | ||
31e4c28d | 139 | struct blkio_group { |
c875f4d0 TH |
140 | /* Pointer to the associated request_queue */ |
141 | struct request_queue *q; | |
e8989fae | 142 | struct list_head q_node; |
31e4c28d | 143 | struct hlist_node blkcg_node; |
7ee9c562 | 144 | struct blkio_cgroup *blkcg; |
2868ef7b VG |
145 | /* Store cgroup path */ |
146 | char path[128]; | |
1adaf3dd TH |
147 | /* reference count */ |
148 | int refcnt; | |
22084190 | 149 | |
549d3aa8 | 150 | struct blkg_policy_data *pd[BLKIO_NR_POLICIES]; |
1adaf3dd | 151 | |
1cd9e039 VG |
152 | /* List of blkg waiting for per cpu stats memory to be allocated */ |
153 | struct list_head alloc_node; | |
1adaf3dd | 154 | struct rcu_head rcu_head; |
31e4c28d VG |
155 | }; |
156 | ||
0381411e | 157 | typedef void (blkio_init_group_fn)(struct blkio_group *blkg); |
ca32aefc | 158 | typedef void (blkio_update_group_weight_fn)(struct request_queue *q, |
fe071437 | 159 | struct blkio_group *blkg, unsigned int weight); |
ca32aefc | 160 | typedef void (blkio_update_group_read_bps_fn)(struct request_queue *q, |
fe071437 | 161 | struct blkio_group *blkg, u64 read_bps); |
ca32aefc | 162 | typedef void (blkio_update_group_write_bps_fn)(struct request_queue *q, |
fe071437 | 163 | struct blkio_group *blkg, u64 write_bps); |
ca32aefc | 164 | typedef void (blkio_update_group_read_iops_fn)(struct request_queue *q, |
fe071437 | 165 | struct blkio_group *blkg, unsigned int read_iops); |
ca32aefc | 166 | typedef void (blkio_update_group_write_iops_fn)(struct request_queue *q, |
fe071437 | 167 | struct blkio_group *blkg, unsigned int write_iops); |
3e252066 VG |
168 | |
169 | struct blkio_policy_ops { | |
0381411e | 170 | blkio_init_group_fn *blkio_init_group_fn; |
3e252066 | 171 | blkio_update_group_weight_fn *blkio_update_group_weight_fn; |
4c9eefa1 VG |
172 | blkio_update_group_read_bps_fn *blkio_update_group_read_bps_fn; |
173 | blkio_update_group_write_bps_fn *blkio_update_group_write_bps_fn; | |
7702e8f4 VG |
174 | blkio_update_group_read_iops_fn *blkio_update_group_read_iops_fn; |
175 | blkio_update_group_write_iops_fn *blkio_update_group_write_iops_fn; | |
3e252066 VG |
176 | }; |
177 | ||
178 | struct blkio_policy_type { | |
179 | struct list_head list; | |
180 | struct blkio_policy_ops ops; | |
062a644d | 181 | enum blkio_policy_id plid; |
0381411e | 182 | size_t pdata_size; /* policy specific private data size */ |
3e252066 VG |
183 | }; |
184 | ||
5efd6113 TH |
185 | extern int blkcg_init_queue(struct request_queue *q); |
186 | extern void blkcg_drain_queue(struct request_queue *q); | |
187 | extern void blkcg_exit_queue(struct request_queue *q); | |
188 | ||
3e252066 VG |
189 | /* Blkio controller policy registration */ |
190 | extern void blkio_policy_register(struct blkio_policy_type *); | |
191 | extern void blkio_policy_unregister(struct blkio_policy_type *); | |
e8989fae TH |
192 | extern void blkg_destroy_all(struct request_queue *q, bool destroy_root); |
193 | extern void update_root_blkg_pd(struct request_queue *q, | |
194 | enum blkio_policy_id plid); | |
3e252066 | 195 | |
0381411e TH |
196 | /** |
197 | * blkg_to_pdata - get policy private data | |
198 | * @blkg: blkg of interest | |
199 | * @pol: policy of interest | |
200 | * | |
201 | * Return pointer to private data associated with the @blkg-@pol pair. | |
202 | */ | |
203 | static inline void *blkg_to_pdata(struct blkio_group *blkg, | |
204 | struct blkio_policy_type *pol) | |
205 | { | |
549d3aa8 | 206 | return blkg ? blkg->pd[pol->plid]->pdata : NULL; |
0381411e TH |
207 | } |
208 | ||
209 | /** | |
210 | * pdata_to_blkg - get blkg associated with policy private data | |
211 | * @pdata: policy private data of interest | |
0381411e | 212 | * |
aaec55a0 | 213 | * @pdata is policy private data. Determine the blkg it's associated with. |
0381411e | 214 | */ |
aaec55a0 | 215 | static inline struct blkio_group *pdata_to_blkg(void *pdata) |
0381411e TH |
216 | { |
217 | if (pdata) { | |
218 | struct blkg_policy_data *pd = | |
219 | container_of(pdata, struct blkg_policy_data, pdata); | |
220 | return pd->blkg; | |
221 | } | |
222 | return NULL; | |
223 | } | |
224 | ||
afc24d49 VG |
225 | static inline char *blkg_path(struct blkio_group *blkg) |
226 | { | |
227 | return blkg->path; | |
228 | } | |
229 | ||
1adaf3dd TH |
230 | /** |
231 | * blkg_get - get a blkg reference | |
232 | * @blkg: blkg to get | |
233 | * | |
234 | * The caller should be holding queue_lock and an existing reference. | |
235 | */ | |
236 | static inline void blkg_get(struct blkio_group *blkg) | |
237 | { | |
238 | lockdep_assert_held(blkg->q->queue_lock); | |
239 | WARN_ON_ONCE(!blkg->refcnt); | |
240 | blkg->refcnt++; | |
241 | } | |
242 | ||
243 | void __blkg_release(struct blkio_group *blkg); | |
244 | ||
245 | /** | |
246 | * blkg_put - put a blkg reference | |
247 | * @blkg: blkg to put | |
248 | * | |
249 | * The caller should be holding queue_lock. | |
250 | */ | |
251 | static inline void blkg_put(struct blkio_group *blkg) | |
252 | { | |
253 | lockdep_assert_held(blkg->q->queue_lock); | |
254 | WARN_ON_ONCE(blkg->refcnt <= 0); | |
255 | if (!--blkg->refcnt) | |
256 | __blkg_release(blkg); | |
257 | } | |
258 | ||
edcb0722 TH |
259 | /** |
260 | * blkg_stat_add - add a value to a blkg_stat | |
261 | * @stat: target blkg_stat | |
262 | * @val: value to add | |
263 | * | |
264 | * Add @val to @stat. The caller is responsible for synchronizing calls to | |
265 | * this function. | |
266 | */ | |
267 | static inline void blkg_stat_add(struct blkg_stat *stat, uint64_t val) | |
268 | { | |
269 | u64_stats_update_begin(&stat->syncp); | |
270 | stat->cnt += val; | |
271 | u64_stats_update_end(&stat->syncp); | |
272 | } | |
273 | ||
274 | /** | |
275 | * blkg_stat_read - read the current value of a blkg_stat | |
276 | * @stat: blkg_stat to read | |
277 | * | |
278 | * Read the current value of @stat. This function can be called without | |
279 | * synchroniztion and takes care of u64 atomicity. | |
280 | */ | |
281 | static inline uint64_t blkg_stat_read(struct blkg_stat *stat) | |
282 | { | |
283 | unsigned int start; | |
284 | uint64_t v; | |
285 | ||
286 | do { | |
287 | start = u64_stats_fetch_begin(&stat->syncp); | |
288 | v = stat->cnt; | |
289 | } while (u64_stats_fetch_retry(&stat->syncp, start)); | |
290 | ||
291 | return v; | |
292 | } | |
293 | ||
294 | /** | |
295 | * blkg_stat_reset - reset a blkg_stat | |
296 | * @stat: blkg_stat to reset | |
297 | */ | |
298 | static inline void blkg_stat_reset(struct blkg_stat *stat) | |
299 | { | |
300 | stat->cnt = 0; | |
301 | } | |
302 | ||
303 | /** | |
304 | * blkg_rwstat_add - add a value to a blkg_rwstat | |
305 | * @rwstat: target blkg_rwstat | |
306 | * @rw: mask of REQ_{WRITE|SYNC} | |
307 | * @val: value to add | |
308 | * | |
309 | * Add @val to @rwstat. The counters are chosen according to @rw. The | |
310 | * caller is responsible for synchronizing calls to this function. | |
311 | */ | |
312 | static inline void blkg_rwstat_add(struct blkg_rwstat *rwstat, | |
313 | int rw, uint64_t val) | |
314 | { | |
315 | u64_stats_update_begin(&rwstat->syncp); | |
316 | ||
317 | if (rw & REQ_WRITE) | |
318 | rwstat->cnt[BLKG_RWSTAT_WRITE] += val; | |
319 | else | |
320 | rwstat->cnt[BLKG_RWSTAT_READ] += val; | |
321 | if (rw & REQ_SYNC) | |
322 | rwstat->cnt[BLKG_RWSTAT_SYNC] += val; | |
323 | else | |
324 | rwstat->cnt[BLKG_RWSTAT_ASYNC] += val; | |
325 | ||
326 | u64_stats_update_end(&rwstat->syncp); | |
327 | } | |
328 | ||
329 | /** | |
330 | * blkg_rwstat_read - read the current values of a blkg_rwstat | |
331 | * @rwstat: blkg_rwstat to read | |
332 | * | |
333 | * Read the current snapshot of @rwstat and return it as the return value. | |
334 | * This function can be called without synchronization and takes care of | |
335 | * u64 atomicity. | |
336 | */ | |
337 | static struct blkg_rwstat blkg_rwstat_read(struct blkg_rwstat *rwstat) | |
338 | { | |
339 | unsigned int start; | |
340 | struct blkg_rwstat tmp; | |
341 | ||
342 | do { | |
343 | start = u64_stats_fetch_begin(&rwstat->syncp); | |
344 | tmp = *rwstat; | |
345 | } while (u64_stats_fetch_retry(&rwstat->syncp, start)); | |
346 | ||
347 | return tmp; | |
348 | } | |
349 | ||
350 | /** | |
351 | * blkg_rwstat_sum - read the total count of a blkg_rwstat | |
352 | * @rwstat: blkg_rwstat to read | |
353 | * | |
354 | * Return the total count of @rwstat regardless of the IO direction. This | |
355 | * function can be called without synchronization and takes care of u64 | |
356 | * atomicity. | |
357 | */ | |
358 | static inline uint64_t blkg_rwstat_sum(struct blkg_rwstat *rwstat) | |
359 | { | |
360 | struct blkg_rwstat tmp = blkg_rwstat_read(rwstat); | |
361 | ||
362 | return tmp.cnt[BLKG_RWSTAT_READ] + tmp.cnt[BLKG_RWSTAT_WRITE]; | |
363 | } | |
364 | ||
365 | /** | |
366 | * blkg_rwstat_reset - reset a blkg_rwstat | |
367 | * @rwstat: blkg_rwstat to reset | |
368 | */ | |
369 | static inline void blkg_rwstat_reset(struct blkg_rwstat *rwstat) | |
370 | { | |
371 | memset(rwstat->cnt, 0, sizeof(rwstat->cnt)); | |
372 | } | |
373 | ||
2f5ea477 JA |
374 | #else |
375 | ||
376 | struct blkio_group { | |
377 | }; | |
378 | ||
3e252066 VG |
379 | struct blkio_policy_type { |
380 | }; | |
381 | ||
5efd6113 TH |
382 | static inline int blkcg_init_queue(struct request_queue *q) { return 0; } |
383 | static inline void blkcg_drain_queue(struct request_queue *q) { } | |
384 | static inline void blkcg_exit_queue(struct request_queue *q) { } | |
3e252066 VG |
385 | static inline void blkio_policy_register(struct blkio_policy_type *blkiop) { } |
386 | static inline void blkio_policy_unregister(struct blkio_policy_type *blkiop) { } | |
03aa264a | 387 | static inline void blkg_destroy_all(struct request_queue *q, |
03aa264a | 388 | bool destory_root) { } |
e8989fae TH |
389 | static inline void update_root_blkg_pd(struct request_queue *q, |
390 | enum blkio_policy_id plid) { } | |
3e252066 | 391 | |
0381411e TH |
392 | static inline void *blkg_to_pdata(struct blkio_group *blkg, |
393 | struct blkio_policy_type *pol) { return NULL; } | |
394 | static inline struct blkio_group *pdata_to_blkg(void *pdata, | |
395 | struct blkio_policy_type *pol) { return NULL; } | |
afc24d49 | 396 | static inline char *blkg_path(struct blkio_group *blkg) { return NULL; } |
1adaf3dd TH |
397 | static inline void blkg_get(struct blkio_group *blkg) { } |
398 | static inline void blkg_put(struct blkio_group *blkg) { } | |
afc24d49 | 399 | |
2f5ea477 JA |
400 | #endif |
401 | ||
df457f84 | 402 | #define BLKIO_WEIGHT_MIN 10 |
31e4c28d VG |
403 | #define BLKIO_WEIGHT_MAX 1000 |
404 | #define BLKIO_WEIGHT_DEFAULT 500 | |
405 | ||
2868ef7b | 406 | #ifdef CONFIG_DEBUG_BLK_CGROUP |
c1768268 TH |
407 | void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg, |
408 | struct blkio_policy_type *pol); | |
9195291e | 409 | void blkiocg_update_dequeue_stats(struct blkio_group *blkg, |
c1768268 TH |
410 | struct blkio_policy_type *pol, |
411 | unsigned long dequeue); | |
412 | void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg, | |
413 | struct blkio_policy_type *pol); | |
414 | void blkiocg_update_idle_time_stats(struct blkio_group *blkg, | |
415 | struct blkio_policy_type *pol); | |
416 | void blkiocg_set_start_empty_time(struct blkio_group *blkg, | |
417 | struct blkio_policy_type *pol); | |
812df48d DS |
418 | |
419 | #define BLKG_FLAG_FNS(name) \ | |
420 | static inline void blkio_mark_blkg_##name( \ | |
421 | struct blkio_group_stats *stats) \ | |
422 | { \ | |
423 | stats->flags |= (1 << BLKG_##name); \ | |
424 | } \ | |
425 | static inline void blkio_clear_blkg_##name( \ | |
426 | struct blkio_group_stats *stats) \ | |
427 | { \ | |
428 | stats->flags &= ~(1 << BLKG_##name); \ | |
429 | } \ | |
430 | static inline int blkio_blkg_##name(struct blkio_group_stats *stats) \ | |
431 | { \ | |
432 | return (stats->flags & (1 << BLKG_##name)) != 0; \ | |
433 | } \ | |
434 | ||
435 | BLKG_FLAG_FNS(waiting) | |
436 | BLKG_FLAG_FNS(idling) | |
437 | BLKG_FLAG_FNS(empty) | |
438 | #undef BLKG_FLAG_FNS | |
2868ef7b | 439 | #else |
c1768268 TH |
440 | static inline void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg, |
441 | struct blkio_policy_type *pol) { } | |
9195291e | 442 | static inline void blkiocg_update_dequeue_stats(struct blkio_group *blkg, |
c1768268 TH |
443 | struct blkio_policy_type *pol, unsigned long dequeue) { } |
444 | static inline void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg, | |
445 | struct blkio_policy_type *pol) { } | |
446 | static inline void blkiocg_update_idle_time_stats(struct blkio_group *blkg, | |
447 | struct blkio_policy_type *pol) { } | |
448 | static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg, | |
449 | struct blkio_policy_type *pol) { } | |
2868ef7b VG |
450 | #endif |
451 | ||
32e380ae | 452 | #ifdef CONFIG_BLK_CGROUP |
31e4c28d VG |
453 | extern struct blkio_cgroup blkio_root_cgroup; |
454 | extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup); | |
4f85cb96 | 455 | extern struct blkio_cgroup *bio_blkio_cgroup(struct bio *bio); |
cd1604fa | 456 | extern struct blkio_group *blkg_lookup(struct blkio_cgroup *blkcg, |
e8989fae | 457 | struct request_queue *q); |
cd1604fa TH |
458 | struct blkio_group *blkg_lookup_create(struct blkio_cgroup *blkcg, |
459 | struct request_queue *q, | |
cd1604fa | 460 | bool for_root); |
303a3acb | 461 | void blkiocg_update_timeslice_used(struct blkio_group *blkg, |
c1768268 TH |
462 | struct blkio_policy_type *pol, |
463 | unsigned long time, | |
464 | unsigned long unaccounted_time); | |
465 | void blkiocg_update_dispatch_stats(struct blkio_group *blkg, | |
466 | struct blkio_policy_type *pol, | |
467 | uint64_t bytes, bool direction, bool sync); | |
84c124da | 468 | void blkiocg_update_completion_stats(struct blkio_group *blkg, |
c1768268 TH |
469 | struct blkio_policy_type *pol, |
470 | uint64_t start_time, | |
471 | uint64_t io_start_time, bool direction, | |
472 | bool sync); | |
473 | void blkiocg_update_io_merged_stats(struct blkio_group *blkg, | |
474 | struct blkio_policy_type *pol, | |
475 | bool direction, bool sync); | |
a11cdaa7 | 476 | void blkiocg_update_io_add_stats(struct blkio_group *blkg, |
c1768268 TH |
477 | struct blkio_policy_type *pol, |
478 | struct blkio_group *curr_blkg, bool direction, | |
479 | bool sync); | |
a11cdaa7 | 480 | void blkiocg_update_io_remove_stats(struct blkio_group *blkg, |
c1768268 TH |
481 | struct blkio_policy_type *pol, |
482 | bool direction, bool sync); | |
31e4c28d | 483 | #else |
2f5ea477 | 484 | struct cgroup; |
31e4c28d VG |
485 | static inline struct blkio_cgroup * |
486 | cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; } | |
70087dc3 | 487 | static inline struct blkio_cgroup * |
4f85cb96 | 488 | bio_blkio_cgroup(struct bio *bio) { return NULL; } |
31e4c28d | 489 | |
cd1604fa TH |
490 | static inline struct blkio_group *blkg_lookup(struct blkio_cgroup *blkcg, |
491 | void *key) { return NULL; } | |
303a3acb | 492 | static inline void blkiocg_update_timeslice_used(struct blkio_group *blkg, |
c1768268 TH |
493 | struct blkio_policy_type *pol, unsigned long time, |
494 | unsigned long unaccounted_time) { } | |
84c124da | 495 | static inline void blkiocg_update_dispatch_stats(struct blkio_group *blkg, |
c1768268 TH |
496 | struct blkio_policy_type *pol, uint64_t bytes, |
497 | bool direction, bool sync) { } | |
84c124da | 498 | static inline void blkiocg_update_completion_stats(struct blkio_group *blkg, |
c1768268 TH |
499 | struct blkio_policy_type *pol, uint64_t start_time, |
500 | uint64_t io_start_time, bool direction, bool sync) { } | |
812d4026 | 501 | static inline void blkiocg_update_io_merged_stats(struct blkio_group *blkg, |
c1768268 TH |
502 | struct blkio_policy_type *pol, bool direction, |
503 | bool sync) { } | |
a11cdaa7 | 504 | static inline void blkiocg_update_io_add_stats(struct blkio_group *blkg, |
c1768268 TH |
505 | struct blkio_policy_type *pol, |
506 | struct blkio_group *curr_blkg, bool direction, | |
507 | bool sync) { } | |
a11cdaa7 | 508 | static inline void blkiocg_update_io_remove_stats(struct blkio_group *blkg, |
c1768268 TH |
509 | struct blkio_policy_type *pol, bool direction, |
510 | bool sync) { } | |
31e4c28d VG |
511 | #endif |
512 | #endif /* _BLK_CGROUP_H */ |