]>
Commit | Line | Data |
---|---|---|
2ff1f2e3 AG |
1 | /* |
2 | * QEMU block throttling group infrastructure | |
3 | * | |
4 | * Copyright (C) Nodalink, EURL. 2014 | |
5 | * Copyright (C) Igalia, S.L. 2015 | |
6 | * | |
7 | * Authors: | |
8 | * BenoƮt Canet <benoit.canet@nodalink.com> | |
9 | * Alberto Garcia <berto@igalia.com> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; either version 2 or | |
14 | * (at your option) version 3 of the License. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
23 | */ | |
24 | ||
80c71a24 | 25 | #include "qemu/osdep.h" |
31dce3cc | 26 | #include "sysemu/block-backend.h" |
2ff1f2e3 | 27 | #include "block/throttle-groups.h" |
432d889e | 28 | #include "qemu/throttle-options.h" |
db725815 | 29 | #include "qemu/main-loop.h" |
76f4afb4 AG |
30 | #include "qemu/queue.h" |
31 | #include "qemu/thread.h" | |
32 | #include "sysemu/qtest.h" | |
432d889e | 33 | #include "qapi/error.h" |
9af23989 | 34 | #include "qapi/qapi-visit-block-core.h" |
432d889e MP |
35 | #include "qom/object.h" |
36 | #include "qom/object_interfaces.h" | |
37 | ||
38 | static void throttle_group_obj_init(Object *obj); | |
39 | static void throttle_group_obj_complete(UserCreatable *obj, Error **errp); | |
3b2337ef | 40 | static void timer_cb(ThrottleGroupMember *tgm, ThrottleDirection direction); |
2ff1f2e3 AG |
41 | |
42 | /* The ThrottleGroup structure (with its ThrottleState) is shared | |
022cdc9f | 43 | * among different ThrottleGroupMembers and it's independent from |
2ff1f2e3 AG |
44 | * AioContext, so in order to use it from different threads it needs |
45 | * its own locking. | |
46 | * | |
47 | * This locking is however handled internally in this file, so it's | |
d87d01e1 | 48 | * transparent to outside users. |
2ff1f2e3 AG |
49 | * |
50 | * The whole ThrottleGroup structure is private and invisible to | |
51 | * outside users, that only use it through its ThrottleState. | |
52 | * | |
022cdc9f | 53 | * In addition to the ThrottleGroup structure, ThrottleGroupMember has |
2ff1f2e3 | 54 | * fields that need to be accessed by other members of the group and |
27ccdd52 | 55 | * therefore also need to be protected by this lock. Once a |
022cdc9f | 56 | * ThrottleGroupMember is registered in a group those fields can be accessed |
27ccdd52 | 57 | * by other threads any time. |
2ff1f2e3 AG |
58 | * |
59 | * Again, all this is handled internally and is mostly transparent to | |
60 | * the outside. The 'throttle_timers' field however has an additional | |
61 | * constraint because it may be temporarily invalid (see for example | |
0d2fac8e | 62 | * blk_set_aio_context()). Therefore in this file a thread will |
022cdc9f MP |
63 | * access some other ThrottleGroupMember's timers only after verifying that |
64 | * that ThrottleGroupMember has throttled requests in the queue. | |
2ff1f2e3 | 65 | */ |
7c9dcd6c | 66 | struct ThrottleGroup { |
432d889e MP |
67 | Object parent_obj; |
68 | ||
69 | /* refuse individual property change if initialization is complete */ | |
70 | bool is_initialized; | |
2ff1f2e3 AG |
71 | char *name; /* This is constant during the lifetime of the group */ |
72 | ||
73 | QemuMutex lock; /* This lock protects the following four fields */ | |
74 | ThrottleState ts; | |
022cdc9f | 75 | QLIST_HEAD(, ThrottleGroupMember) head; |
3b2337ef ZP |
76 | ThrottleGroupMember *tokens[THROTTLE_MAX]; |
77 | bool any_timer_armed[THROTTLE_MAX]; | |
dbe824cc | 78 | QEMUClockType clock_type; |
2ff1f2e3 | 79 | |
432d889e | 80 | /* This field is protected by the global QEMU mutex */ |
2ff1f2e3 | 81 | QTAILQ_ENTRY(ThrottleGroup) list; |
7c9dcd6c | 82 | }; |
2ff1f2e3 | 83 | |
432d889e | 84 | /* This is protected by the global QEMU mutex */ |
2ff1f2e3 AG |
85 | static QTAILQ_HEAD(, ThrottleGroup) throttle_groups = |
86 | QTAILQ_HEAD_INITIALIZER(throttle_groups); | |
87 | ||
432d889e MP |
88 | |
89 | /* This function reads throttle_groups and must be called under the global | |
90 | * mutex. | |
91 | */ | |
92 | static ThrottleGroup *throttle_group_by_name(const char *name) | |
93 | { | |
94 | ThrottleGroup *iter; | |
95 | ||
96 | /* Look for an existing group with that name */ | |
97 | QTAILQ_FOREACH(iter, &throttle_groups, list) { | |
98 | if (!g_strcmp0(name, iter->name)) { | |
99 | return iter; | |
100 | } | |
101 | } | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
d8e7d87e MP |
106 | /* This function reads throttle_groups and must be called under the global |
107 | * mutex. | |
108 | */ | |
109 | bool throttle_group_exists(const char *name) | |
110 | { | |
111 | return throttle_group_by_name(name) != NULL; | |
112 | } | |
113 | ||
2ff1f2e3 AG |
114 | /* Increments the reference count of a ThrottleGroup given its name. |
115 | * | |
116 | * If no ThrottleGroup is found with the given name a new one is | |
117 | * created. | |
118 | * | |
432d889e MP |
119 | * This function edits throttle_groups and must be called under the global |
120 | * mutex. | |
121 | * | |
2ff1f2e3 | 122 | * @name: the name of the ThrottleGroup |
973f2ddf | 123 | * @ret: the ThrottleState member of the ThrottleGroup |
2ff1f2e3 | 124 | */ |
973f2ddf | 125 | ThrottleState *throttle_group_incref(const char *name) |
2ff1f2e3 AG |
126 | { |
127 | ThrottleGroup *tg = NULL; | |
2ff1f2e3 AG |
128 | |
129 | /* Look for an existing group with that name */ | |
432d889e MP |
130 | tg = throttle_group_by_name(name); |
131 | ||
132 | if (tg) { | |
133 | object_ref(OBJECT(tg)); | |
134 | } else { | |
135 | /* Create a new one if not found */ | |
136 | /* new ThrottleGroup obj will have a refcnt = 1 */ | |
137 | tg = THROTTLE_GROUP(object_new(TYPE_THROTTLE_GROUP)); | |
2ff1f2e3 | 138 | tg->name = g_strdup(name); |
432d889e | 139 | throttle_group_obj_complete(USER_CREATABLE(tg), &error_abort); |
2ff1f2e3 AG |
140 | } |
141 | ||
973f2ddf | 142 | return &tg->ts; |
2ff1f2e3 AG |
143 | } |
144 | ||
145 | /* Decrease the reference count of a ThrottleGroup. | |
146 | * | |
147 | * When the reference count reaches zero the ThrottleGroup is | |
148 | * destroyed. | |
149 | * | |
432d889e MP |
150 | * This function edits throttle_groups and must be called under the global |
151 | * mutex. | |
152 | * | |
973f2ddf | 153 | * @ts: The ThrottleGroup to unref, given by its ThrottleState member |
2ff1f2e3 | 154 | */ |
973f2ddf | 155 | void throttle_group_unref(ThrottleState *ts) |
2ff1f2e3 | 156 | { |
973f2ddf | 157 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); |
432d889e | 158 | object_unref(OBJECT(tg)); |
2ff1f2e3 AG |
159 | } |
160 | ||
022cdc9f | 161 | /* Get the name from a ThrottleGroupMember's group. The name (and the pointer) |
49d2165d | 162 | * is guaranteed to remain constant during the lifetime of the group. |
2ff1f2e3 | 163 | * |
022cdc9f | 164 | * @tgm: a ThrottleGroupMember |
2ff1f2e3 AG |
165 | * @ret: the name of the group. |
166 | */ | |
022cdc9f | 167 | const char *throttle_group_get_name(ThrottleGroupMember *tgm) |
2ff1f2e3 | 168 | { |
022cdc9f | 169 | ThrottleGroup *tg = container_of(tgm->throttle_state, ThrottleGroup, ts); |
2ff1f2e3 AG |
170 | return tg->name; |
171 | } | |
172 | ||
022cdc9f MP |
173 | /* Return the next ThrottleGroupMember in the round-robin sequence, simulating |
174 | * a circular list. | |
2ff1f2e3 AG |
175 | * |
176 | * This assumes that tg->lock is held. | |
177 | * | |
022cdc9f MP |
178 | * @tgm: the current ThrottleGroupMember |
179 | * @ret: the next ThrottleGroupMember in the sequence | |
2ff1f2e3 | 180 | */ |
022cdc9f | 181 | static ThrottleGroupMember *throttle_group_next_tgm(ThrottleGroupMember *tgm) |
2ff1f2e3 | 182 | { |
022cdc9f | 183 | ThrottleState *ts = tgm->throttle_state; |
2ff1f2e3 | 184 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); |
022cdc9f | 185 | ThrottleGroupMember *next = QLIST_NEXT(tgm, round_robin); |
2ff1f2e3 AG |
186 | |
187 | if (!next) { | |
31dce3cc | 188 | next = QLIST_FIRST(&tg->head); |
2ff1f2e3 AG |
189 | } |
190 | ||
022cdc9f | 191 | return next; |
2ff1f2e3 AG |
192 | } |
193 | ||
6bf77e1c | 194 | /* |
022cdc9f | 195 | * Return whether a ThrottleGroupMember has pending requests. |
6bf77e1c AG |
196 | * |
197 | * This assumes that tg->lock is held. | |
198 | * | |
022cdc9f | 199 | * @tgm: the ThrottleGroupMember |
3b2337ef | 200 | * @direction: the ThrottleDirection |
022cdc9f | 201 | * @ret: whether the ThrottleGroupMember has pending requests. |
6bf77e1c | 202 | */ |
022cdc9f | 203 | static inline bool tgm_has_pending_reqs(ThrottleGroupMember *tgm, |
3b2337ef | 204 | ThrottleDirection direction) |
6bf77e1c | 205 | { |
3b2337ef | 206 | return tgm->pending_reqs[direction]; |
6bf77e1c AG |
207 | } |
208 | ||
022cdc9f MP |
209 | /* Return the next ThrottleGroupMember in the round-robin sequence with pending |
210 | * I/O requests. | |
76f4afb4 AG |
211 | * |
212 | * This assumes that tg->lock is held. | |
213 | * | |
022cdc9f | 214 | * @tgm: the current ThrottleGroupMember |
3b2337ef | 215 | * @direction: the ThrottleDirection |
022cdc9f MP |
216 | * @ret: the next ThrottleGroupMember with pending requests, or tgm if |
217 | * there is none. | |
76f4afb4 | 218 | */ |
022cdc9f | 219 | static ThrottleGroupMember *next_throttle_token(ThrottleGroupMember *tgm, |
3b2337ef | 220 | ThrottleDirection direction) |
76f4afb4 | 221 | { |
022cdc9f MP |
222 | ThrottleState *ts = tgm->throttle_state; |
223 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); | |
224 | ThrottleGroupMember *token, *start; | |
76f4afb4 | 225 | |
5d8e4ca0 AG |
226 | /* If this member has its I/O limits disabled then it means that |
227 | * it's being drained. Skip the round-robin search and return tgm | |
228 | * immediately if it has pending requests. Otherwise we could be | |
229 | * forcing it to wait for other member's throttled requests. */ | |
3b2337ef | 230 | if (tgm_has_pending_reqs(tgm, direction) && |
d73415a3 | 231 | qatomic_read(&tgm->io_limits_disabled)) { |
5d8e4ca0 AG |
232 | return tgm; |
233 | } | |
234 | ||
3b2337ef | 235 | start = token = tg->tokens[direction]; |
76f4afb4 AG |
236 | |
237 | /* get next bs round in round robin style */ | |
022cdc9f | 238 | token = throttle_group_next_tgm(token); |
3b2337ef | 239 | while (token != start && !tgm_has_pending_reqs(token, direction)) { |
022cdc9f | 240 | token = throttle_group_next_tgm(token); |
76f4afb4 AG |
241 | } |
242 | ||
243 | /* If no IO are queued for scheduling on the next round robin token | |
022cdc9f MP |
244 | * then decide the token is the current tgm because chances are |
245 | * the current tgm got the current request queued. | |
76f4afb4 | 246 | */ |
3b2337ef | 247 | if (token == start && !tgm_has_pending_reqs(token, direction)) { |
022cdc9f | 248 | token = tgm; |
76f4afb4 AG |
249 | } |
250 | ||
022cdc9f | 251 | /* Either we return the original TGM, or one with pending requests */ |
3b2337ef | 252 | assert(token == tgm || tgm_has_pending_reqs(token, direction)); |
6bf77e1c | 253 | |
76f4afb4 AG |
254 | return token; |
255 | } | |
256 | ||
022cdc9f MP |
257 | /* Check if the next I/O request for a ThrottleGroupMember needs to be |
258 | * throttled or not. If there's no timer set in this group, set one and update | |
259 | * the token accordingly. | |
76f4afb4 AG |
260 | * |
261 | * This assumes that tg->lock is held. | |
262 | * | |
022cdc9f | 263 | * @tgm: the current ThrottleGroupMember |
3b2337ef | 264 | * @direction: the ThrottleDirection |
76f4afb4 AG |
265 | * @ret: whether the I/O request needs to be throttled or not |
266 | */ | |
022cdc9f | 267 | static bool throttle_group_schedule_timer(ThrottleGroupMember *tgm, |
3b2337ef | 268 | ThrottleDirection direction) |
76f4afb4 | 269 | { |
022cdc9f | 270 | ThrottleState *ts = tgm->throttle_state; |
76f4afb4 | 271 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); |
022cdc9f | 272 | ThrottleTimers *tt = &tgm->throttle_timers; |
76f4afb4 AG |
273 | bool must_wait; |
274 | ||
d73415a3 | 275 | if (qatomic_read(&tgm->io_limits_disabled)) { |
ce0f1412 PB |
276 | return false; |
277 | } | |
278 | ||
76f4afb4 | 279 | /* Check if any of the timers in this group is already armed */ |
3b2337ef | 280 | if (tg->any_timer_armed[direction]) { |
76f4afb4 AG |
281 | return true; |
282 | } | |
283 | ||
e76f201f | 284 | must_wait = throttle_schedule_timer(ts, tt, direction); |
76f4afb4 | 285 | |
022cdc9f | 286 | /* If a timer just got armed, set tgm as the current token */ |
76f4afb4 | 287 | if (must_wait) { |
3b2337ef ZP |
288 | tg->tokens[direction] = tgm; |
289 | tg->any_timer_armed[direction] = true; | |
76f4afb4 AG |
290 | } |
291 | ||
292 | return must_wait; | |
293 | } | |
294 | ||
022cdc9f | 295 | /* Start the next pending I/O request for a ThrottleGroupMember. Return whether |
3b170dc8 PB |
296 | * any request was actually pending. |
297 | * | |
022cdc9f | 298 | * @tgm: the current ThrottleGroupMember |
3b2337ef | 299 | * @direction: the ThrottleDirection |
3b170dc8 | 300 | */ |
022cdc9f | 301 | static bool coroutine_fn throttle_group_co_restart_queue(ThrottleGroupMember *tgm, |
3b2337ef | 302 | ThrottleDirection direction) |
3b170dc8 | 303 | { |
93001e9d | 304 | bool ret; |
3b170dc8 | 305 | |
022cdc9f | 306 | qemu_co_mutex_lock(&tgm->throttled_reqs_lock); |
3b2337ef | 307 | ret = qemu_co_queue_next(&tgm->throttled_reqs[direction]); |
022cdc9f | 308 | qemu_co_mutex_unlock(&tgm->throttled_reqs_lock); |
93001e9d PB |
309 | |
310 | return ret; | |
3b170dc8 PB |
311 | } |
312 | ||
76f4afb4 AG |
313 | /* Look for the next pending I/O request and schedule it. |
314 | * | |
315 | * This assumes that tg->lock is held. | |
316 | * | |
022cdc9f | 317 | * @tgm: the current ThrottleGroupMember |
3b2337ef | 318 | * @direction: the ThrottleDirection |
76f4afb4 | 319 | */ |
e2dbca03 PB |
320 | static void coroutine_mixed_fn schedule_next_request(ThrottleGroupMember *tgm, |
321 | ThrottleDirection direction) | |
76f4afb4 | 322 | { |
022cdc9f MP |
323 | ThrottleState *ts = tgm->throttle_state; |
324 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); | |
76f4afb4 | 325 | bool must_wait; |
022cdc9f | 326 | ThrottleGroupMember *token; |
76f4afb4 AG |
327 | |
328 | /* Check if there's any pending request to schedule next */ | |
3b2337ef ZP |
329 | token = next_throttle_token(tgm, direction); |
330 | if (!tgm_has_pending_reqs(token, direction)) { | |
76f4afb4 AG |
331 | return; |
332 | } | |
333 | ||
334 | /* Set a timer for the request if it needs to be throttled */ | |
3b2337ef | 335 | must_wait = throttle_group_schedule_timer(token, direction); |
76f4afb4 AG |
336 | |
337 | /* If it doesn't have to wait, queue it for immediate execution */ | |
338 | if (!must_wait) { | |
022cdc9f | 339 | /* Give preference to requests from the current tgm */ |
76f4afb4 | 340 | if (qemu_in_coroutine() && |
3b2337ef | 341 | throttle_group_co_restart_queue(tgm, direction)) { |
022cdc9f | 342 | token = tgm; |
76f4afb4 | 343 | } else { |
022cdc9f | 344 | ThrottleTimers *tt = &token->throttle_timers; |
dbe824cc | 345 | int64_t now = qemu_clock_get_ns(tg->clock_type); |
3b2337ef ZP |
346 | timer_mod(tt->timers[direction], now); |
347 | tg->any_timer_armed[direction] = true; | |
76f4afb4 | 348 | } |
3b2337ef | 349 | tg->tokens[direction] = token; |
76f4afb4 AG |
350 | } |
351 | } | |
352 | ||
353 | /* Check if an I/O request needs to be throttled, wait and set a timer | |
354 | * if necessary, and schedule the next request using a round robin | |
355 | * algorithm. | |
356 | * | |
022cdc9f | 357 | * @tgm: the current ThrottleGroupMember |
76f4afb4 | 358 | * @bytes: the number of bytes for this I/O |
3b2337ef | 359 | * @direction: the ThrottleDirection |
76f4afb4 | 360 | */ |
022cdc9f | 361 | void coroutine_fn throttle_group_co_io_limits_intercept(ThrottleGroupMember *tgm, |
801625e6 | 362 | int64_t bytes, |
3b2337ef | 363 | ThrottleDirection direction) |
76f4afb4 AG |
364 | { |
365 | bool must_wait; | |
022cdc9f MP |
366 | ThrottleGroupMember *token; |
367 | ThrottleGroup *tg = container_of(tgm->throttle_state, ThrottleGroup, ts); | |
801625e6 VSO |
368 | |
369 | assert(bytes >= 0); | |
3b2337ef | 370 | assert(direction < THROTTLE_MAX); |
801625e6 | 371 | |
76f4afb4 AG |
372 | qemu_mutex_lock(&tg->lock); |
373 | ||
374 | /* First we check if this I/O has to be throttled. */ | |
3b2337ef ZP |
375 | token = next_throttle_token(tgm, direction); |
376 | must_wait = throttle_group_schedule_timer(token, direction); | |
76f4afb4 AG |
377 | |
378 | /* Wait if there's a timer set or queued requests of this type */ | |
3b2337ef ZP |
379 | if (must_wait || tgm->pending_reqs[direction]) { |
380 | tgm->pending_reqs[direction]++; | |
76f4afb4 | 381 | qemu_mutex_unlock(&tg->lock); |
022cdc9f | 382 | qemu_co_mutex_lock(&tgm->throttled_reqs_lock); |
3b2337ef | 383 | qemu_co_queue_wait(&tgm->throttled_reqs[direction], |
022cdc9f MP |
384 | &tgm->throttled_reqs_lock); |
385 | qemu_co_mutex_unlock(&tgm->throttled_reqs_lock); | |
76f4afb4 | 386 | qemu_mutex_lock(&tg->lock); |
3b2337ef | 387 | tgm->pending_reqs[direction]--; |
76f4afb4 AG |
388 | } |
389 | ||
390 | /* The I/O will be executed, so do the accounting */ | |
e76f201f | 391 | throttle_account(tgm->throttle_state, direction, bytes); |
76f4afb4 AG |
392 | |
393 | /* Schedule the next request */ | |
3b2337ef | 394 | schedule_next_request(tgm, direction); |
76f4afb4 AG |
395 | |
396 | qemu_mutex_unlock(&tg->lock); | |
397 | } | |
398 | ||
3b170dc8 | 399 | typedef struct { |
022cdc9f | 400 | ThrottleGroupMember *tgm; |
3b2337ef | 401 | ThrottleDirection direction; |
3b170dc8 PB |
402 | } RestartData; |
403 | ||
404 | static void coroutine_fn throttle_group_restart_queue_entry(void *opaque) | |
7258ed93 | 405 | { |
3b170dc8 | 406 | RestartData *data = opaque; |
022cdc9f MP |
407 | ThrottleGroupMember *tgm = data->tgm; |
408 | ThrottleState *ts = tgm->throttle_state; | |
409 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); | |
3b2337ef | 410 | ThrottleDirection direction = data->direction; |
7258ed93 PB |
411 | bool empty_queue; |
412 | ||
3b2337ef | 413 | empty_queue = !throttle_group_co_restart_queue(tgm, direction); |
7258ed93 PB |
414 | |
415 | /* If the request queue was empty then we have to take care of | |
416 | * scheduling the next one */ | |
417 | if (empty_queue) { | |
418 | qemu_mutex_lock(&tg->lock); | |
3b2337ef | 419 | schedule_next_request(tgm, direction); |
7258ed93 PB |
420 | qemu_mutex_unlock(&tg->lock); |
421 | } | |
43a5dc02 MP |
422 | |
423 | g_free(data); | |
bc19a0a6 | 424 | |
d73415a3 | 425 | qatomic_dec(&tgm->restart_pending); |
bc19a0a6 | 426 | aio_wait_kick(); |
7258ed93 PB |
427 | } |
428 | ||
3b2337ef ZP |
429 | static void throttle_group_restart_queue(ThrottleGroupMember *tgm, |
430 | ThrottleDirection direction) | |
3b170dc8 PB |
431 | { |
432 | Coroutine *co; | |
43a5dc02 MP |
433 | RestartData *rd = g_new0(RestartData, 1); |
434 | ||
435 | rd->tgm = tgm; | |
3b2337ef | 436 | rd->direction = direction; |
3b170dc8 | 437 | |
25b8e4db AG |
438 | /* This function is called when a timer is fired or when |
439 | * throttle_group_restart_tgm() is called. Either way, there can | |
440 | * be no timer pending on this tgm at this point */ | |
3b2337ef | 441 | assert(!timer_pending(tgm->throttle_timers.timers[direction])); |
25b8e4db | 442 | |
d73415a3 | 443 | qatomic_inc(&tgm->restart_pending); |
bc19a0a6 | 444 | |
43a5dc02 | 445 | co = qemu_coroutine_create(throttle_group_restart_queue_entry, rd); |
c61791fc | 446 | aio_co_enter(tgm->aio_context, co); |
3b170dc8 PB |
447 | } |
448 | ||
022cdc9f | 449 | void throttle_group_restart_tgm(ThrottleGroupMember *tgm) |
a72f6414 | 450 | { |
3b2337ef | 451 | ThrottleDirection dir; |
25b8e4db | 452 | |
022cdc9f | 453 | if (tgm->throttle_state) { |
3b2337ef ZP |
454 | for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) { |
455 | QEMUTimer *t = tgm->throttle_timers.timers[dir]; | |
25b8e4db AG |
456 | if (timer_pending(t)) { |
457 | /* If there's a pending timer on this tgm, fire it now */ | |
458 | timer_del(t); | |
3b2337ef | 459 | timer_cb(tgm, dir); |
25b8e4db AG |
460 | } else { |
461 | /* Else run the next request from the queue manually */ | |
3b2337ef | 462 | throttle_group_restart_queue(tgm, dir); |
25b8e4db AG |
463 | } |
464 | } | |
a72f6414 PB |
465 | } |
466 | } | |
467 | ||
2ff1f2e3 AG |
468 | /* Update the throttle configuration for a particular group. Similar |
469 | * to throttle_config(), but guarantees atomicity within the | |
470 | * throttling group. | |
471 | * | |
022cdc9f | 472 | * @tgm: a ThrottleGroupMember that is a member of the group |
2ff1f2e3 AG |
473 | * @cfg: the configuration to set |
474 | */ | |
022cdc9f | 475 | void throttle_group_config(ThrottleGroupMember *tgm, ThrottleConfig *cfg) |
2ff1f2e3 | 476 | { |
022cdc9f | 477 | ThrottleState *ts = tgm->throttle_state; |
2ff1f2e3 AG |
478 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); |
479 | qemu_mutex_lock(&tg->lock); | |
27e4cf13 | 480 | throttle_config(ts, tg->clock_type, cfg); |
2ff1f2e3 | 481 | qemu_mutex_unlock(&tg->lock); |
a72f6414 | 482 | |
022cdc9f | 483 | throttle_group_restart_tgm(tgm); |
2ff1f2e3 AG |
484 | } |
485 | ||
486 | /* Get the throttle configuration from a particular group. Similar to | |
487 | * throttle_get_config(), but guarantees atomicity within the | |
488 | * throttling group. | |
489 | * | |
022cdc9f | 490 | * @tgm: a ThrottleGroupMember that is a member of the group |
2ff1f2e3 AG |
491 | * @cfg: the configuration will be written here |
492 | */ | |
022cdc9f | 493 | void throttle_group_get_config(ThrottleGroupMember *tgm, ThrottleConfig *cfg) |
2ff1f2e3 | 494 | { |
022cdc9f | 495 | ThrottleState *ts = tgm->throttle_state; |
2ff1f2e3 AG |
496 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); |
497 | qemu_mutex_lock(&tg->lock); | |
498 | throttle_get_config(ts, cfg); | |
499 | qemu_mutex_unlock(&tg->lock); | |
500 | } | |
501 | ||
76f4afb4 AG |
502 | /* ThrottleTimers callback. This wakes up a request that was waiting |
503 | * because it had been throttled. | |
504 | * | |
c61791fc | 505 | * @tgm: the ThrottleGroupMember whose request had been throttled |
3b2337ef | 506 | * @direction: the ThrottleDirection |
76f4afb4 | 507 | */ |
3b2337ef | 508 | static void timer_cb(ThrottleGroupMember *tgm, ThrottleDirection direction) |
76f4afb4 | 509 | { |
022cdc9f | 510 | ThrottleState *ts = tgm->throttle_state; |
76f4afb4 | 511 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); |
76f4afb4 AG |
512 | |
513 | /* The timer has just been fired, so we can update the flag */ | |
514 | qemu_mutex_lock(&tg->lock); | |
3b2337ef | 515 | tg->any_timer_armed[direction] = false; |
76f4afb4 AG |
516 | qemu_mutex_unlock(&tg->lock); |
517 | ||
518 | /* Run the request that was waiting for this timer */ | |
3b2337ef | 519 | throttle_group_restart_queue(tgm, direction); |
76f4afb4 AG |
520 | } |
521 | ||
522 | static void read_timer_cb(void *opaque) | |
523 | { | |
3b2337ef | 524 | timer_cb(opaque, THROTTLE_READ); |
76f4afb4 AG |
525 | } |
526 | ||
527 | static void write_timer_cb(void *opaque) | |
528 | { | |
3b2337ef | 529 | timer_cb(opaque, THROTTLE_WRITE); |
76f4afb4 AG |
530 | } |
531 | ||
022cdc9f MP |
532 | /* Register a ThrottleGroupMember from the throttling group, also initializing |
533 | * its timers and updating its throttle_state pointer to point to it. If a | |
31dce3cc | 534 | * throttling group with that name does not exist yet, it will be created. |
2ff1f2e3 | 535 | * |
432d889e MP |
536 | * This function edits throttle_groups and must be called under the global |
537 | * mutex. | |
538 | * | |
022cdc9f | 539 | * @tgm: the ThrottleGroupMember to insert |
2ff1f2e3 | 540 | * @groupname: the name of the group |
c61791fc | 541 | * @ctx: the AioContext to use |
2ff1f2e3 | 542 | */ |
022cdc9f | 543 | void throttle_group_register_tgm(ThrottleGroupMember *tgm, |
c61791fc MP |
544 | const char *groupname, |
545 | AioContext *ctx) | |
2ff1f2e3 | 546 | { |
3b2337ef | 547 | ThrottleDirection dir; |
973f2ddf HR |
548 | ThrottleState *ts = throttle_group_incref(groupname); |
549 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); | |
022cdc9f MP |
550 | |
551 | tgm->throttle_state = ts; | |
c61791fc | 552 | tgm->aio_context = ctx; |
d73415a3 | 553 | qatomic_set(&tgm->restart_pending, 0); |
2ff1f2e3 | 554 | |
3af613eb | 555 | QEMU_LOCK_GUARD(&tg->lock); |
022cdc9f | 556 | /* If the ThrottleGroup is new set this ThrottleGroupMember as the token */ |
3b2337ef ZP |
557 | for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) { |
558 | if (!tg->tokens[dir]) { | |
559 | tg->tokens[dir] = tgm; | |
2ff1f2e3 | 560 | } |
3b2337ef | 561 | qemu_co_queue_init(&tgm->throttled_reqs[dir]); |
2ff1f2e3 AG |
562 | } |
563 | ||
022cdc9f | 564 | QLIST_INSERT_HEAD(&tg->head, tgm, round_robin); |
76f4afb4 | 565 | |
022cdc9f | 566 | throttle_timers_init(&tgm->throttle_timers, |
c61791fc | 567 | tgm->aio_context, |
dbe824cc | 568 | tg->clock_type, |
76f4afb4 AG |
569 | read_timer_cb, |
570 | write_timer_cb, | |
c61791fc | 571 | tgm); |
f738cfc8 | 572 | qemu_co_mutex_init(&tgm->throttled_reqs_lock); |
2ff1f2e3 AG |
573 | } |
574 | ||
022cdc9f | 575 | /* Unregister a ThrottleGroupMember from its group, removing it from the list, |
31dce3cc | 576 | * destroying the timers and setting the throttle_state pointer to NULL. |
2ff1f2e3 | 577 | * |
022cdc9f MP |
578 | * The ThrottleGroupMember must not have pending throttled requests, so the |
579 | * caller has to drain them first. | |
5ac72418 | 580 | * |
2ff1f2e3 AG |
581 | * The group will be destroyed if it's empty after this operation. |
582 | * | |
022cdc9f | 583 | * @tgm the ThrottleGroupMember to remove |
2ff1f2e3 | 584 | */ |
022cdc9f | 585 | void throttle_group_unregister_tgm(ThrottleGroupMember *tgm) |
2ff1f2e3 | 586 | { |
022cdc9f MP |
587 | ThrottleState *ts = tgm->throttle_state; |
588 | ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts); | |
589 | ThrottleGroupMember *token; | |
3b2337ef | 590 | ThrottleDirection dir; |
2ff1f2e3 | 591 | |
d8e7d87e MP |
592 | if (!ts) { |
593 | /* Discard already unregistered tgm */ | |
594 | return; | |
595 | } | |
596 | ||
bc19a0a6 | 597 | /* Wait for throttle_group_restart_queue_entry() coroutines to finish */ |
d73415a3 | 598 | AIO_WAIT_WHILE(tgm->aio_context, qatomic_read(&tgm->restart_pending) > 0); |
bc19a0a6 | 599 | |
3af613eb | 600 | WITH_QEMU_LOCK_GUARD(&tg->lock) { |
3b2337ef ZP |
601 | for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) { |
602 | assert(tgm->pending_reqs[dir] == 0); | |
603 | assert(qemu_co_queue_empty(&tgm->throttled_reqs[dir])); | |
604 | assert(!timer_pending(tgm->throttle_timers.timers[dir])); | |
605 | if (tg->tokens[dir] == tgm) { | |
3af613eb GQ |
606 | token = throttle_group_next_tgm(tgm); |
607 | /* Take care of the case where this is the last tgm in the group */ | |
608 | if (token == tgm) { | |
609 | token = NULL; | |
610 | } | |
3b2337ef | 611 | tg->tokens[dir] = token; |
2ff1f2e3 | 612 | } |
2ff1f2e3 | 613 | } |
2ff1f2e3 | 614 | |
3af613eb GQ |
615 | /* remove the current tgm from the list */ |
616 | QLIST_REMOVE(tgm, round_robin); | |
617 | throttle_timers_destroy(&tgm->throttle_timers); | |
618 | } | |
2ff1f2e3 | 619 | |
973f2ddf | 620 | throttle_group_unref(&tg->ts); |
022cdc9f | 621 | tgm->throttle_state = NULL; |
2ff1f2e3 AG |
622 | } |
623 | ||
c61791fc MP |
624 | void throttle_group_attach_aio_context(ThrottleGroupMember *tgm, |
625 | AioContext *new_context) | |
626 | { | |
627 | ThrottleTimers *tt = &tgm->throttle_timers; | |
628 | throttle_timers_attach_aio_context(tt, new_context); | |
629 | tgm->aio_context = new_context; | |
630 | } | |
631 | ||
632 | void throttle_group_detach_aio_context(ThrottleGroupMember *tgm) | |
633 | { | |
341e0b56 | 634 | ThrottleGroup *tg = container_of(tgm->throttle_state, ThrottleGroup, ts); |
c61791fc | 635 | ThrottleTimers *tt = &tgm->throttle_timers; |
3b2337ef | 636 | ThrottleDirection dir; |
dc868fb0 SH |
637 | |
638 | /* Requests must have been drained */ | |
3b2337ef ZP |
639 | for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) { |
640 | assert(tgm->pending_reqs[dir] == 0); | |
641 | assert(qemu_co_queue_empty(&tgm->throttled_reqs[dir])); | |
642 | } | |
dc868fb0 | 643 | |
341e0b56 | 644 | /* Kick off next ThrottleGroupMember, if necessary */ |
3af613eb | 645 | WITH_QEMU_LOCK_GUARD(&tg->lock) { |
3b2337ef ZP |
646 | for (dir = THROTTLE_READ; dir < THROTTLE_MAX; dir++) { |
647 | if (timer_pending(tt->timers[dir])) { | |
648 | tg->any_timer_armed[dir] = false; | |
649 | schedule_next_request(tgm, dir); | |
3af613eb | 650 | } |
341e0b56 SH |
651 | } |
652 | } | |
341e0b56 | 653 | |
c61791fc MP |
654 | throttle_timers_detach_aio_context(tt); |
655 | tgm->aio_context = NULL; | |
656 | } | |
657 | ||
432d889e MP |
658 | #undef THROTTLE_OPT_PREFIX |
659 | #define THROTTLE_OPT_PREFIX "x-" | |
660 | ||
661 | /* Helper struct and array for QOM property setter/getter */ | |
662 | typedef struct { | |
663 | const char *name; | |
664 | BucketType type; | |
665 | enum { | |
666 | AVG, | |
667 | MAX, | |
668 | BURST_LENGTH, | |
669 | IOPS_SIZE, | |
670 | } category; | |
671 | } ThrottleParamInfo; | |
672 | ||
673 | static ThrottleParamInfo properties[] = { | |
674 | { | |
675 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_TOTAL, | |
676 | THROTTLE_OPS_TOTAL, AVG, | |
677 | }, | |
678 | { | |
679 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_TOTAL_MAX, | |
680 | THROTTLE_OPS_TOTAL, MAX, | |
681 | }, | |
682 | { | |
683 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_TOTAL_MAX_LENGTH, | |
684 | THROTTLE_OPS_TOTAL, BURST_LENGTH, | |
685 | }, | |
686 | { | |
687 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_READ, | |
688 | THROTTLE_OPS_READ, AVG, | |
689 | }, | |
690 | { | |
691 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_READ_MAX, | |
692 | THROTTLE_OPS_READ, MAX, | |
693 | }, | |
694 | { | |
695 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_READ_MAX_LENGTH, | |
696 | THROTTLE_OPS_READ, BURST_LENGTH, | |
697 | }, | |
698 | { | |
699 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_WRITE, | |
700 | THROTTLE_OPS_WRITE, AVG, | |
701 | }, | |
702 | { | |
703 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_WRITE_MAX, | |
704 | THROTTLE_OPS_WRITE, MAX, | |
705 | }, | |
706 | { | |
707 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_WRITE_MAX_LENGTH, | |
708 | THROTTLE_OPS_WRITE, BURST_LENGTH, | |
709 | }, | |
710 | { | |
711 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_TOTAL, | |
712 | THROTTLE_BPS_TOTAL, AVG, | |
713 | }, | |
714 | { | |
715 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_TOTAL_MAX, | |
716 | THROTTLE_BPS_TOTAL, MAX, | |
717 | }, | |
718 | { | |
719 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_TOTAL_MAX_LENGTH, | |
720 | THROTTLE_BPS_TOTAL, BURST_LENGTH, | |
721 | }, | |
722 | { | |
723 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_READ, | |
724 | THROTTLE_BPS_READ, AVG, | |
725 | }, | |
726 | { | |
727 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_READ_MAX, | |
728 | THROTTLE_BPS_READ, MAX, | |
729 | }, | |
730 | { | |
731 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_READ_MAX_LENGTH, | |
732 | THROTTLE_BPS_READ, BURST_LENGTH, | |
733 | }, | |
734 | { | |
735 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_WRITE, | |
736 | THROTTLE_BPS_WRITE, AVG, | |
737 | }, | |
738 | { | |
739 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_WRITE_MAX, | |
740 | THROTTLE_BPS_WRITE, MAX, | |
741 | }, | |
742 | { | |
743 | THROTTLE_OPT_PREFIX QEMU_OPT_BPS_WRITE_MAX_LENGTH, | |
744 | THROTTLE_BPS_WRITE, BURST_LENGTH, | |
745 | }, | |
746 | { | |
747 | THROTTLE_OPT_PREFIX QEMU_OPT_IOPS_SIZE, | |
748 | 0, IOPS_SIZE, | |
749 | } | |
750 | }; | |
751 | ||
752 | /* This function edits throttle_groups and must be called under the global | |
753 | * mutex */ | |
754 | static void throttle_group_obj_init(Object *obj) | |
755 | { | |
756 | ThrottleGroup *tg = THROTTLE_GROUP(obj); | |
757 | ||
758 | tg->clock_type = QEMU_CLOCK_REALTIME; | |
759 | if (qtest_enabled()) { | |
760 | /* For testing block IO throttling only */ | |
761 | tg->clock_type = QEMU_CLOCK_VIRTUAL; | |
762 | } | |
763 | tg->is_initialized = false; | |
764 | qemu_mutex_init(&tg->lock); | |
765 | throttle_init(&tg->ts); | |
766 | QLIST_INIT(&tg->head); | |
767 | } | |
768 | ||
769 | /* This function edits throttle_groups and must be called under the global | |
770 | * mutex */ | |
771 | static void throttle_group_obj_complete(UserCreatable *obj, Error **errp) | |
772 | { | |
773 | ThrottleGroup *tg = THROTTLE_GROUP(obj); | |
774 | ThrottleConfig cfg; | |
775 | ||
776 | /* set group name to object id if it exists */ | |
777 | if (!tg->name && tg->parent_obj.parent) { | |
7a309cc9 | 778 | tg->name = g_strdup(object_get_canonical_path_component(OBJECT(obj))); |
432d889e MP |
779 | } |
780 | /* We must have a group name at this point */ | |
781 | assert(tg->name); | |
782 | ||
783 | /* error if name is duplicate */ | |
d8e7d87e | 784 | if (throttle_group_exists(tg->name)) { |
432d889e MP |
785 | error_setg(errp, "A group with this name already exists"); |
786 | return; | |
787 | } | |
788 | ||
789 | /* check validity */ | |
790 | throttle_get_config(&tg->ts, &cfg); | |
791 | if (!throttle_is_valid(&cfg, errp)) { | |
792 | return; | |
793 | } | |
794 | throttle_config(&tg->ts, tg->clock_type, &cfg); | |
795 | QTAILQ_INSERT_TAIL(&throttle_groups, tg, list); | |
796 | tg->is_initialized = true; | |
797 | } | |
798 | ||
799 | /* This function edits throttle_groups and must be called under the global | |
800 | * mutex */ | |
801 | static void throttle_group_obj_finalize(Object *obj) | |
802 | { | |
803 | ThrottleGroup *tg = THROTTLE_GROUP(obj); | |
804 | if (tg->is_initialized) { | |
805 | QTAILQ_REMOVE(&throttle_groups, tg, list); | |
806 | } | |
807 | qemu_mutex_destroy(&tg->lock); | |
808 | g_free(tg->name); | |
809 | } | |
810 | ||
811 | static void throttle_group_set(Object *obj, Visitor *v, const char * name, | |
812 | void *opaque, Error **errp) | |
813 | ||
814 | { | |
815 | ThrottleGroup *tg = THROTTLE_GROUP(obj); | |
816 | ThrottleConfig *cfg; | |
817 | ThrottleParamInfo *info = opaque; | |
432d889e MP |
818 | int64_t value; |
819 | ||
820 | /* If we have finished initialization, don't accept individual property | |
821 | * changes through QOM. Throttle configuration limits must be set in one | |
822 | * transaction, as certain combinations are invalid. | |
823 | */ | |
824 | if (tg->is_initialized) { | |
dcfe4805 MA |
825 | error_setg(errp, "Property cannot be set after initialization"); |
826 | return; | |
432d889e MP |
827 | } |
828 | ||
668f62ec | 829 | if (!visit_type_int64(v, name, &value, errp)) { |
dcfe4805 | 830 | return; |
432d889e MP |
831 | } |
832 | if (value < 0) { | |
dcfe4805 MA |
833 | error_setg(errp, "Property values cannot be negative"); |
834 | return; | |
432d889e MP |
835 | } |
836 | ||
837 | cfg = &tg->ts.cfg; | |
838 | switch (info->category) { | |
839 | case AVG: | |
840 | cfg->buckets[info->type].avg = value; | |
841 | break; | |
842 | case MAX: | |
843 | cfg->buckets[info->type].max = value; | |
844 | break; | |
845 | case BURST_LENGTH: | |
846 | if (value > UINT_MAX) { | |
dcfe4805 MA |
847 | error_setg(errp, "%s value must be in the" "range [0, %u]", |
848 | info->name, UINT_MAX); | |
849 | return; | |
432d889e MP |
850 | } |
851 | cfg->buckets[info->type].burst_length = value; | |
852 | break; | |
853 | case IOPS_SIZE: | |
854 | cfg->op_size = value; | |
855 | break; | |
856 | } | |
432d889e MP |
857 | } |
858 | ||
859 | static void throttle_group_get(Object *obj, Visitor *v, const char *name, | |
860 | void *opaque, Error **errp) | |
861 | { | |
862 | ThrottleGroup *tg = THROTTLE_GROUP(obj); | |
863 | ThrottleConfig cfg; | |
864 | ThrottleParamInfo *info = opaque; | |
865 | int64_t value; | |
866 | ||
867 | throttle_get_config(&tg->ts, &cfg); | |
868 | switch (info->category) { | |
869 | case AVG: | |
870 | value = cfg.buckets[info->type].avg; | |
871 | break; | |
872 | case MAX: | |
873 | value = cfg.buckets[info->type].max; | |
874 | break; | |
875 | case BURST_LENGTH: | |
876 | value = cfg.buckets[info->type].burst_length; | |
877 | break; | |
878 | case IOPS_SIZE: | |
879 | value = cfg.op_size; | |
880 | break; | |
881 | } | |
882 | ||
883 | visit_type_int64(v, name, &value, errp); | |
884 | } | |
885 | ||
886 | static void throttle_group_set_limits(Object *obj, Visitor *v, | |
887 | const char *name, void *opaque, | |
888 | Error **errp) | |
889 | ||
890 | { | |
891 | ThrottleGroup *tg = THROTTLE_GROUP(obj); | |
892 | ThrottleConfig cfg; | |
88be15a9 | 893 | ThrottleLimits *argp; |
432d889e MP |
894 | Error *local_err = NULL; |
895 | ||
14217038 MA |
896 | if (!visit_type_ThrottleLimits(v, name, &argp, errp)) { |
897 | return; | |
432d889e MP |
898 | } |
899 | qemu_mutex_lock(&tg->lock); | |
900 | throttle_get_config(&tg->ts, &cfg); | |
901 | throttle_limits_to_config(argp, &cfg, &local_err); | |
902 | if (local_err) { | |
903 | goto unlock; | |
904 | } | |
905 | throttle_config(&tg->ts, tg->clock_type, &cfg); | |
906 | ||
907 | unlock: | |
908 | qemu_mutex_unlock(&tg->lock); | |
88be15a9 | 909 | qapi_free_ThrottleLimits(argp); |
432d889e MP |
910 | error_propagate(errp, local_err); |
911 | return; | |
912 | } | |
913 | ||
914 | static void throttle_group_get_limits(Object *obj, Visitor *v, | |
915 | const char *name, void *opaque, | |
916 | Error **errp) | |
917 | { | |
918 | ThrottleGroup *tg = THROTTLE_GROUP(obj); | |
919 | ThrottleConfig cfg; | |
920 | ThrottleLimits arg = { 0 }; | |
921 | ThrottleLimits *argp = &arg; | |
922 | ||
923 | qemu_mutex_lock(&tg->lock); | |
924 | throttle_get_config(&tg->ts, &cfg); | |
925 | qemu_mutex_unlock(&tg->lock); | |
926 | ||
927 | throttle_config_to_limits(&cfg, argp); | |
928 | ||
929 | visit_type_ThrottleLimits(v, name, &argp, errp); | |
930 | } | |
931 | ||
932 | static bool throttle_group_can_be_deleted(UserCreatable *uc) | |
933 | { | |
934 | return OBJECT(uc)->ref == 1; | |
935 | } | |
936 | ||
937 | static void throttle_group_obj_class_init(ObjectClass *klass, void *class_data) | |
938 | { | |
939 | size_t i = 0; | |
940 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(klass); | |
941 | ||
942 | ucc->complete = throttle_group_obj_complete; | |
943 | ucc->can_be_deleted = throttle_group_can_be_deleted; | |
944 | ||
945 | /* individual properties */ | |
946 | for (i = 0; i < sizeof(properties) / sizeof(ThrottleParamInfo); i++) { | |
947 | object_class_property_add(klass, | |
948 | properties[i].name, | |
949 | "int", | |
950 | throttle_group_get, | |
951 | throttle_group_set, | |
d2623129 | 952 | NULL, &properties[i]); |
432d889e MP |
953 | } |
954 | ||
955 | /* ThrottleLimits */ | |
956 | object_class_property_add(klass, | |
957 | "limits", "ThrottleLimits", | |
958 | throttle_group_get_limits, | |
959 | throttle_group_set_limits, | |
d2623129 | 960 | NULL, NULL); |
432d889e MP |
961 | } |
962 | ||
963 | static const TypeInfo throttle_group_info = { | |
964 | .name = TYPE_THROTTLE_GROUP, | |
965 | .parent = TYPE_OBJECT, | |
966 | .class_init = throttle_group_obj_class_init, | |
967 | .instance_size = sizeof(ThrottleGroup), | |
968 | .instance_init = throttle_group_obj_init, | |
969 | .instance_finalize = throttle_group_obj_finalize, | |
970 | .interfaces = (InterfaceInfo[]) { | |
971 | { TYPE_USER_CREATABLE }, | |
972 | { } | |
973 | }, | |
974 | }; | |
975 | ||
2ff1f2e3 AG |
976 | static void throttle_groups_init(void) |
977 | { | |
432d889e | 978 | type_register_static(&throttle_group_info); |
2ff1f2e3 AG |
979 | } |
980 | ||
432d889e | 981 | type_init(throttle_groups_init); |