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a58c490f JG |
1 | /* |
2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
11 | * for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public License | |
14 | * along with this library; if not, write to the Free Software Foundation, | |
15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
18 | #include <lttng/condition/condition-internal.h> | |
19 | #include <lttng/condition/buffer-usage-internal.h> | |
20 | #include <common/macros.h> | |
21 | #include <common/error.h> | |
22 | #include <assert.h> | |
23 | #include <math.h> | |
24 | #include <float.h> | |
25 | #include <time.h> | |
26 | ||
27 | #define IS_USAGE_CONDITION(condition) ( \ | |
28 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || \ | |
29 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH \ | |
30 | ) | |
31 | ||
32 | static | |
33 | double fixed_to_double(uint32_t val) | |
34 | { | |
35 | return (double) val / (double) UINT32_MAX; | |
36 | } | |
37 | ||
38 | static | |
39 | uint64_t double_to_fixed(double val) | |
40 | { | |
41 | return (val * (double) UINT32_MAX); | |
42 | } | |
43 | ||
44 | static | |
45 | bool is_usage_evaluation(const struct lttng_evaluation *evaluation) | |
46 | { | |
47 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); | |
48 | ||
49 | return type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || | |
50 | type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH; | |
51 | } | |
52 | ||
53 | static | |
54 | void lttng_condition_buffer_usage_destroy(struct lttng_condition *condition) | |
55 | { | |
56 | struct lttng_condition_buffer_usage *usage; | |
57 | ||
58 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
59 | parent); | |
60 | ||
61 | free(usage->session_name); | |
62 | free(usage->channel_name); | |
63 | free(usage); | |
64 | } | |
65 | ||
66 | static | |
67 | bool lttng_condition_buffer_usage_validate( | |
68 | const struct lttng_condition *condition) | |
69 | { | |
70 | bool valid = false; | |
71 | struct lttng_condition_buffer_usage *usage; | |
72 | ||
73 | if (!condition) { | |
74 | goto end; | |
75 | } | |
76 | ||
77 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
78 | parent); | |
79 | if (!usage->session_name) { | |
80 | ERR("Invalid buffer condition: a target session name must be set."); | |
81 | goto end; | |
82 | } | |
83 | if (!usage->channel_name) { | |
84 | ERR("Invalid buffer condition: a target channel name must be set."); | |
85 | goto end; | |
86 | } | |
87 | if (!usage->threshold_ratio.set && !usage->threshold_bytes.set) { | |
88 | ERR("Invalid buffer condition: a threshold must be set."); | |
89 | goto end; | |
90 | } | |
821d5e92 JG |
91 | if (!usage->domain.set) { |
92 | ERR("Invalid buffer usage condition: a domain must be set."); | |
93 | goto end; | |
94 | } | |
a58c490f JG |
95 | |
96 | valid = true; | |
97 | end: | |
98 | return valid; | |
99 | } | |
100 | ||
101 | static | |
3647288f JG |
102 | int lttng_condition_buffer_usage_serialize( |
103 | const struct lttng_condition *condition, | |
104 | struct lttng_dynamic_buffer *buf) | |
a58c490f | 105 | { |
3647288f | 106 | int ret; |
a58c490f | 107 | struct lttng_condition_buffer_usage *usage; |
a58c490f | 108 | size_t session_name_len, channel_name_len; |
3647288f | 109 | struct lttng_condition_buffer_usage_comm usage_comm; |
a58c490f JG |
110 | |
111 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
112 | ret = -1; | |
113 | goto end; | |
114 | } | |
115 | ||
116 | DBG("Serializing buffer usage condition"); | |
117 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
118 | parent); | |
3647288f | 119 | |
a58c490f JG |
120 | session_name_len = strlen(usage->session_name) + 1; |
121 | channel_name_len = strlen(usage->channel_name) + 1; | |
122 | if (session_name_len > LTTNG_NAME_MAX || | |
123 | channel_name_len > LTTNG_NAME_MAX) { | |
124 | ret = -1; | |
125 | goto end; | |
126 | } | |
3647288f JG |
127 | |
128 | usage_comm.threshold_set_in_bytes = !!usage->threshold_bytes.set; | |
129 | usage_comm.session_name_len = session_name_len; | |
130 | usage_comm.channel_name_len = channel_name_len; | |
131 | usage_comm.domain_type = (int8_t) usage->domain.type; | |
132 | ||
133 | if (usage->threshold_bytes.set) { | |
134 | usage_comm.threshold = usage->threshold_bytes.value; | |
135 | } else { | |
136 | uint64_t val = double_to_fixed( | |
137 | usage->threshold_ratio.value); | |
138 | ||
139 | if (val > UINT32_MAX) { | |
140 | /* overflow. */ | |
141 | ret = -1; | |
142 | goto end; | |
a58c490f | 143 | } |
3647288f JG |
144 | usage_comm.threshold = val; |
145 | } | |
a58c490f | 146 | |
3647288f JG |
147 | ret = lttng_dynamic_buffer_append(buf, &usage_comm, |
148 | sizeof(usage_comm)); | |
149 | if (ret) { | |
150 | goto end; | |
151 | } | |
152 | ret = lttng_dynamic_buffer_append(buf, usage->session_name, | |
153 | session_name_len); | |
154 | if (ret) { | |
155 | goto end; | |
156 | } | |
157 | ret = lttng_dynamic_buffer_append(buf, usage->channel_name, | |
158 | channel_name_len); | |
159 | if (ret) { | |
160 | goto end; | |
a58c490f | 161 | } |
a58c490f JG |
162 | end: |
163 | return ret; | |
164 | } | |
165 | ||
166 | static | |
167 | bool lttng_condition_buffer_usage_is_equal(const struct lttng_condition *_a, | |
168 | const struct lttng_condition *_b) | |
169 | { | |
170 | bool is_equal = false; | |
171 | struct lttng_condition_buffer_usage *a, *b; | |
172 | ||
173 | a = container_of(_a, struct lttng_condition_buffer_usage, parent); | |
174 | b = container_of(_b, struct lttng_condition_buffer_usage, parent); | |
175 | ||
176 | if ((a->threshold_ratio.set && !b->threshold_ratio.set) || | |
177 | (a->threshold_bytes.set && !b->threshold_bytes.set)) { | |
178 | goto end; | |
179 | } | |
180 | ||
181 | if (a->threshold_ratio.set && b->threshold_ratio.set) { | |
182 | double a_value, b_value, diff; | |
183 | ||
184 | a_value = a->threshold_ratio.value; | |
185 | b_value = b->threshold_ratio.value; | |
186 | diff = fabs(a_value - b_value); | |
187 | ||
188 | if (diff > DBL_EPSILON) { | |
189 | goto end; | |
190 | } | |
191 | } else if (a->threshold_bytes.set && b->threshold_bytes.set) { | |
192 | uint64_t a_value, b_value; | |
193 | ||
194 | a_value = a->threshold_bytes.value; | |
195 | b_value = b->threshold_bytes.value; | |
196 | if (a_value != b_value) { | |
197 | goto end; | |
198 | } | |
199 | } | |
200 | ||
821d5e92 JG |
201 | /* Condition is not valid if this is not true. */ |
202 | assert(a->session_name); | |
203 | assert(b->session_name); | |
204 | if (strcmp(a->session_name, b->session_name)) { | |
a58c490f JG |
205 | goto end; |
206 | } | |
207 | ||
821d5e92 JG |
208 | assert(a->channel_name); |
209 | assert(b->channel_name); | |
210 | if (strcmp(a->channel_name, b->channel_name)) { | |
a58c490f JG |
211 | goto end; |
212 | } | |
213 | ||
821d5e92 JG |
214 | assert(a->domain.set); |
215 | assert(b->domain.set); | |
216 | if (a->domain.type != b->domain.type) { | |
a58c490f JG |
217 | goto end; |
218 | } | |
a58c490f JG |
219 | is_equal = true; |
220 | end: | |
221 | return is_equal; | |
222 | } | |
223 | ||
224 | static | |
225 | struct lttng_condition *lttng_condition_buffer_usage_create( | |
226 | enum lttng_condition_type type) | |
227 | { | |
228 | struct lttng_condition_buffer_usage *condition; | |
229 | ||
230 | condition = zmalloc(sizeof(struct lttng_condition_buffer_usage)); | |
231 | if (!condition) { | |
9a09eef5 | 232 | return NULL; |
a58c490f JG |
233 | } |
234 | ||
235 | lttng_condition_init(&condition->parent, type); | |
236 | condition->parent.validate = lttng_condition_buffer_usage_validate; | |
237 | condition->parent.serialize = lttng_condition_buffer_usage_serialize; | |
238 | condition->parent.equal = lttng_condition_buffer_usage_is_equal; | |
239 | condition->parent.destroy = lttng_condition_buffer_usage_destroy; | |
a58c490f JG |
240 | return &condition->parent; |
241 | } | |
242 | ||
243 | struct lttng_condition *lttng_condition_buffer_usage_low_create(void) | |
244 | { | |
245 | return lttng_condition_buffer_usage_create( | |
246 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW); | |
247 | } | |
248 | ||
249 | struct lttng_condition *lttng_condition_buffer_usage_high_create(void) | |
250 | { | |
251 | return lttng_condition_buffer_usage_create( | |
252 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH); | |
253 | } | |
254 | ||
255 | static | |
256 | ssize_t init_condition_from_buffer(struct lttng_condition *condition, | |
257 | const struct lttng_buffer_view *src_view) | |
258 | { | |
259 | ssize_t ret, condition_size; | |
260 | enum lttng_condition_status status; | |
261 | enum lttng_domain_type domain_type; | |
262 | const struct lttng_condition_buffer_usage_comm *condition_comm; | |
263 | const char *session_name, *channel_name; | |
264 | struct lttng_buffer_view names_view; | |
265 | ||
266 | if (src_view->size < sizeof(*condition_comm)) { | |
267 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); | |
268 | ret = -1; | |
269 | goto end; | |
270 | } | |
271 | ||
272 | condition_comm = (const struct lttng_condition_buffer_usage_comm *) src_view->data; | |
273 | names_view = lttng_buffer_view_from_view(src_view, | |
274 | sizeof(*condition_comm), -1); | |
275 | ||
276 | if (condition_comm->session_name_len > LTTNG_NAME_MAX || | |
277 | condition_comm->channel_name_len > LTTNG_NAME_MAX) { | |
278 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); | |
279 | ret = -1; | |
280 | goto end; | |
281 | } | |
282 | ||
283 | if (names_view.size < | |
284 | (condition_comm->session_name_len + | |
285 | condition_comm->channel_name_len)) { | |
286 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); | |
287 | ret = -1; | |
288 | goto end; | |
289 | } | |
290 | ||
291 | if (condition_comm->threshold_set_in_bytes) { | |
292 | status = lttng_condition_buffer_usage_set_threshold(condition, | |
293 | condition_comm->threshold); | |
294 | } else { | |
295 | status = lttng_condition_buffer_usage_set_threshold_ratio( | |
296 | condition, | |
297 | fixed_to_double(condition_comm->threshold)); | |
298 | } | |
299 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
300 | ERR("Failed to initialize buffer usage condition threshold"); | |
301 | ret = -1; | |
302 | goto end; | |
303 | } | |
304 | ||
305 | if (condition_comm->domain_type <= LTTNG_DOMAIN_NONE || | |
306 | condition_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
307 | /* Invalid domain value. */ | |
308 | ERR("Invalid domain type value (%i) found in condition buffer", | |
309 | (int) condition_comm->domain_type); | |
310 | ret = -1; | |
311 | goto end; | |
312 | } | |
313 | ||
314 | domain_type = (enum lttng_domain_type) condition_comm->domain_type; | |
315 | status = lttng_condition_buffer_usage_set_domain_type(condition, | |
316 | domain_type); | |
317 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
318 | ERR("Failed to set buffer usage condition domain"); | |
319 | ret = -1; | |
320 | goto end; | |
321 | } | |
322 | ||
323 | session_name = names_view.data; | |
324 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { | |
325 | ERR("Malformed session name encountered in condition buffer"); | |
326 | ret = -1; | |
327 | goto end; | |
328 | } | |
329 | ||
330 | channel_name = session_name + condition_comm->session_name_len; | |
331 | if (*(channel_name + condition_comm->channel_name_len - 1) != '\0') { | |
332 | ERR("Malformed channel name encountered in condition buffer"); | |
333 | ret = -1; | |
334 | goto end; | |
335 | } | |
336 | ||
337 | status = lttng_condition_buffer_usage_set_session_name(condition, | |
338 | session_name); | |
339 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
340 | ERR("Failed to set buffer usage session name"); | |
341 | ret = -1; | |
342 | goto end; | |
343 | } | |
344 | ||
345 | status = lttng_condition_buffer_usage_set_channel_name(condition, | |
346 | channel_name); | |
347 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
348 | ERR("Failed to set buffer usage channel name"); | |
349 | ret = -1; | |
350 | goto end; | |
351 | } | |
352 | ||
353 | if (!lttng_condition_validate(condition)) { | |
354 | ret = -1; | |
355 | goto end; | |
356 | } | |
357 | ||
358 | condition_size = sizeof(*condition_comm) + | |
359 | (ssize_t) condition_comm->session_name_len + | |
360 | (ssize_t) condition_comm->channel_name_len; | |
361 | ret = condition_size; | |
362 | end: | |
363 | return ret; | |
364 | } | |
365 | ||
366 | LTTNG_HIDDEN | |
367 | ssize_t lttng_condition_buffer_usage_low_create_from_buffer( | |
368 | const struct lttng_buffer_view *view, | |
369 | struct lttng_condition **_condition) | |
370 | { | |
371 | ssize_t ret; | |
372 | struct lttng_condition *condition = | |
373 | lttng_condition_buffer_usage_low_create(); | |
374 | ||
375 | if (!_condition || !condition) { | |
376 | ret = -1; | |
377 | goto error; | |
378 | } | |
379 | ||
380 | ret = init_condition_from_buffer(condition, view); | |
381 | if (ret < 0) { | |
382 | goto error; | |
383 | } | |
384 | ||
385 | *_condition = condition; | |
386 | return ret; | |
387 | error: | |
388 | lttng_condition_destroy(condition); | |
389 | return ret; | |
390 | } | |
391 | ||
392 | LTTNG_HIDDEN | |
393 | ssize_t lttng_condition_buffer_usage_high_create_from_buffer( | |
394 | const struct lttng_buffer_view *view, | |
395 | struct lttng_condition **_condition) | |
396 | { | |
397 | ssize_t ret; | |
398 | struct lttng_condition *condition = | |
399 | lttng_condition_buffer_usage_high_create(); | |
400 | ||
401 | if (!_condition || !condition) { | |
402 | ret = -1; | |
403 | goto error; | |
404 | } | |
405 | ||
406 | ret = init_condition_from_buffer(condition, view); | |
407 | if (ret < 0) { | |
408 | goto error; | |
409 | } | |
410 | ||
411 | *_condition = condition; | |
412 | return ret; | |
413 | error: | |
414 | lttng_condition_destroy(condition); | |
415 | return ret; | |
416 | } | |
417 | ||
418 | static | |
419 | struct lttng_evaluation *create_evaluation_from_buffer( | |
420 | enum lttng_condition_type type, | |
421 | const struct lttng_buffer_view *view) | |
422 | { | |
423 | const struct lttng_evaluation_buffer_usage_comm *comm = | |
424 | (const struct lttng_evaluation_buffer_usage_comm *) view->data; | |
425 | struct lttng_evaluation *evaluation = NULL; | |
426 | ||
427 | if (view->size < sizeof(*comm)) { | |
428 | goto end; | |
429 | } | |
430 | ||
431 | evaluation = lttng_evaluation_buffer_usage_create(type, | |
432 | comm->buffer_use, comm->buffer_capacity); | |
433 | end: | |
434 | return evaluation; | |
435 | } | |
436 | ||
437 | LTTNG_HIDDEN | |
438 | ssize_t lttng_evaluation_buffer_usage_low_create_from_buffer( | |
439 | const struct lttng_buffer_view *view, | |
440 | struct lttng_evaluation **_evaluation) | |
441 | { | |
442 | ssize_t ret; | |
443 | struct lttng_evaluation *evaluation = NULL; | |
444 | ||
445 | if (!_evaluation) { | |
446 | ret = -1; | |
447 | goto error; | |
448 | } | |
449 | ||
450 | evaluation = create_evaluation_from_buffer( | |
451 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW, view); | |
452 | if (!evaluation) { | |
453 | ret = -1; | |
454 | goto error; | |
455 | } | |
456 | ||
457 | *_evaluation = evaluation; | |
458 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
459 | return ret; | |
460 | error: | |
461 | lttng_evaluation_destroy(evaluation); | |
462 | return ret; | |
463 | } | |
464 | ||
465 | LTTNG_HIDDEN | |
466 | ssize_t lttng_evaluation_buffer_usage_high_create_from_buffer( | |
467 | const struct lttng_buffer_view *view, | |
468 | struct lttng_evaluation **_evaluation) | |
469 | { | |
470 | ssize_t ret; | |
471 | struct lttng_evaluation *evaluation = NULL; | |
472 | ||
473 | if (!_evaluation) { | |
474 | ret = -1; | |
475 | goto error; | |
476 | } | |
477 | ||
478 | evaluation = create_evaluation_from_buffer( | |
479 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH, view); | |
480 | if (!evaluation) { | |
481 | ret = -1; | |
482 | goto error; | |
483 | } | |
484 | ||
485 | *_evaluation = evaluation; | |
486 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
487 | return ret; | |
488 | error: | |
489 | lttng_evaluation_destroy(evaluation); | |
490 | return ret; | |
491 | } | |
492 | ||
493 | enum lttng_condition_status | |
494 | lttng_condition_buffer_usage_get_threshold_ratio( | |
495 | const struct lttng_condition *condition, | |
496 | double *threshold_ratio) | |
497 | { | |
498 | struct lttng_condition_buffer_usage *usage; | |
499 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
500 | ||
501 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
502 | !threshold_ratio) { | |
503 | status = LTTNG_CONDITION_STATUS_INVALID; | |
504 | goto end; | |
505 | } | |
506 | ||
507 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
508 | parent); | |
509 | if (!usage->threshold_ratio.set) { | |
510 | status = LTTNG_CONDITION_STATUS_UNSET; | |
511 | goto end; | |
512 | } | |
513 | *threshold_ratio = usage->threshold_ratio.value; | |
514 | end: | |
515 | return status; | |
516 | } | |
517 | ||
518 | /* threshold_ratio expressed as [0.0, 1.0]. */ | |
519 | enum lttng_condition_status | |
520 | lttng_condition_buffer_usage_set_threshold_ratio( | |
521 | struct lttng_condition *condition, double threshold_ratio) | |
522 | { | |
523 | struct lttng_condition_buffer_usage *usage; | |
524 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
525 | ||
526 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
527 | threshold_ratio < 0.0 || | |
528 | threshold_ratio > 1.0) { | |
529 | status = LTTNG_CONDITION_STATUS_INVALID; | |
530 | goto end; | |
531 | } | |
532 | ||
533 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
534 | parent); | |
535 | usage->threshold_ratio.set = true; | |
536 | usage->threshold_bytes.set = false; | |
537 | usage->threshold_ratio.value = threshold_ratio; | |
538 | end: | |
539 | return status; | |
540 | } | |
541 | ||
542 | enum lttng_condition_status | |
543 | lttng_condition_buffer_usage_get_threshold( | |
544 | const struct lttng_condition *condition, | |
545 | uint64_t *threshold_bytes) | |
546 | { | |
547 | struct lttng_condition_buffer_usage *usage; | |
548 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
549 | ||
550 | if (!condition || !IS_USAGE_CONDITION(condition) || !threshold_bytes) { | |
551 | status = LTTNG_CONDITION_STATUS_INVALID; | |
552 | goto end; | |
553 | } | |
554 | ||
555 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
556 | parent); | |
557 | if (!usage->threshold_bytes.set) { | |
558 | status = LTTNG_CONDITION_STATUS_UNSET; | |
559 | goto end; | |
560 | } | |
561 | *threshold_bytes = usage->threshold_bytes.value; | |
562 | end: | |
563 | return status; | |
564 | } | |
565 | ||
566 | enum lttng_condition_status | |
567 | lttng_condition_buffer_usage_set_threshold( | |
568 | struct lttng_condition *condition, uint64_t threshold_bytes) | |
569 | { | |
570 | struct lttng_condition_buffer_usage *usage; | |
571 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
572 | ||
573 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
574 | status = LTTNG_CONDITION_STATUS_INVALID; | |
575 | goto end; | |
576 | } | |
577 | ||
578 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
579 | parent); | |
580 | usage->threshold_ratio.set = false; | |
581 | usage->threshold_bytes.set = true; | |
582 | usage->threshold_bytes.value = threshold_bytes; | |
583 | end: | |
584 | return status; | |
585 | } | |
586 | ||
587 | enum lttng_condition_status | |
588 | lttng_condition_buffer_usage_get_session_name( | |
589 | const struct lttng_condition *condition, | |
590 | const char **session_name) | |
591 | { | |
592 | struct lttng_condition_buffer_usage *usage; | |
593 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
594 | ||
595 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name) { | |
596 | status = LTTNG_CONDITION_STATUS_INVALID; | |
597 | goto end; | |
598 | } | |
599 | ||
600 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
601 | parent); | |
602 | if (!usage->session_name) { | |
603 | status = LTTNG_CONDITION_STATUS_UNSET; | |
604 | goto end; | |
605 | } | |
606 | *session_name = usage->session_name; | |
607 | end: | |
608 | return status; | |
609 | } | |
610 | ||
611 | enum lttng_condition_status | |
612 | lttng_condition_buffer_usage_set_session_name( | |
613 | struct lttng_condition *condition, const char *session_name) | |
614 | { | |
615 | char *session_name_copy; | |
616 | struct lttng_condition_buffer_usage *usage; | |
617 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
618 | ||
619 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name || | |
620 | strlen(session_name) == 0) { | |
621 | status = LTTNG_CONDITION_STATUS_INVALID; | |
622 | goto end; | |
623 | } | |
624 | ||
625 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
626 | parent); | |
627 | session_name_copy = strdup(session_name); | |
628 | if (!session_name_copy) { | |
629 | status = LTTNG_CONDITION_STATUS_ERROR; | |
630 | goto end; | |
631 | } | |
632 | ||
633 | if (usage->session_name) { | |
634 | free(usage->session_name); | |
635 | } | |
636 | usage->session_name = session_name_copy; | |
637 | end: | |
638 | return status; | |
639 | } | |
640 | ||
641 | enum lttng_condition_status | |
642 | lttng_condition_buffer_usage_get_channel_name( | |
643 | const struct lttng_condition *condition, | |
644 | const char **channel_name) | |
645 | { | |
646 | struct lttng_condition_buffer_usage *usage; | |
647 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
648 | ||
649 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name) { | |
650 | status = LTTNG_CONDITION_STATUS_INVALID; | |
651 | goto end; | |
652 | } | |
653 | ||
654 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
655 | parent); | |
656 | if (!usage->channel_name) { | |
657 | status = LTTNG_CONDITION_STATUS_UNSET; | |
658 | goto end; | |
659 | } | |
660 | *channel_name = usage->channel_name; | |
661 | end: | |
662 | return status; | |
663 | } | |
664 | ||
665 | enum lttng_condition_status | |
666 | lttng_condition_buffer_usage_set_channel_name( | |
667 | struct lttng_condition *condition, const char *channel_name) | |
668 | { | |
669 | char *channel_name_copy; | |
670 | struct lttng_condition_buffer_usage *usage; | |
671 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
672 | ||
673 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name || | |
674 | strlen(channel_name) == 0) { | |
675 | status = LTTNG_CONDITION_STATUS_INVALID; | |
676 | goto end; | |
677 | } | |
678 | ||
679 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
680 | parent); | |
681 | channel_name_copy = strdup(channel_name); | |
682 | if (!channel_name_copy) { | |
683 | status = LTTNG_CONDITION_STATUS_ERROR; | |
684 | goto end; | |
685 | } | |
686 | ||
687 | if (usage->channel_name) { | |
688 | free(usage->channel_name); | |
689 | } | |
690 | usage->channel_name = channel_name_copy; | |
691 | end: | |
692 | return status; | |
693 | } | |
694 | ||
695 | enum lttng_condition_status | |
696 | lttng_condition_buffer_usage_get_domain_type( | |
697 | const struct lttng_condition *condition, | |
698 | enum lttng_domain_type *type) | |
699 | { | |
700 | struct lttng_condition_buffer_usage *usage; | |
701 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
702 | ||
703 | if (!condition || !IS_USAGE_CONDITION(condition) || !type) { | |
704 | status = LTTNG_CONDITION_STATUS_INVALID; | |
705 | goto end; | |
706 | } | |
707 | ||
708 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
709 | parent); | |
710 | if (!usage->domain.set) { | |
711 | status = LTTNG_CONDITION_STATUS_UNSET; | |
712 | goto end; | |
713 | } | |
714 | *type = usage->domain.type; | |
715 | end: | |
716 | return status; | |
717 | } | |
718 | ||
719 | enum lttng_condition_status | |
720 | lttng_condition_buffer_usage_set_domain_type( | |
721 | struct lttng_condition *condition, enum lttng_domain_type type) | |
722 | { | |
723 | struct lttng_condition_buffer_usage *usage; | |
724 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
725 | ||
726 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
727 | type == LTTNG_DOMAIN_NONE) { | |
728 | status = LTTNG_CONDITION_STATUS_INVALID; | |
729 | goto end; | |
730 | } | |
731 | ||
732 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
733 | parent); | |
734 | usage->domain.set = true; | |
735 | usage->domain.type = type; | |
736 | end: | |
737 | return status; | |
738 | } | |
739 | ||
740 | static | |
3647288f | 741 | int lttng_evaluation_buffer_usage_serialize( |
9b63a4aa | 742 | const struct lttng_evaluation *evaluation, |
3647288f | 743 | struct lttng_dynamic_buffer *buf) |
a58c490f | 744 | { |
a58c490f | 745 | struct lttng_evaluation_buffer_usage *usage; |
3647288f | 746 | struct lttng_evaluation_buffer_usage_comm comm; |
a58c490f JG |
747 | |
748 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
749 | parent); | |
3647288f JG |
750 | comm.buffer_use = usage->buffer_use; |
751 | comm.buffer_capacity = usage->buffer_capacity; | |
a58c490f | 752 | |
3647288f | 753 | return lttng_dynamic_buffer_append(buf, &comm, sizeof(comm)); |
a58c490f JG |
754 | } |
755 | ||
756 | static | |
757 | void lttng_evaluation_buffer_usage_destroy( | |
758 | struct lttng_evaluation *evaluation) | |
759 | { | |
760 | struct lttng_evaluation_buffer_usage *usage; | |
761 | ||
762 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
763 | parent); | |
764 | free(usage); | |
765 | } | |
766 | ||
767 | LTTNG_HIDDEN | |
768 | struct lttng_evaluation *lttng_evaluation_buffer_usage_create( | |
769 | enum lttng_condition_type type, uint64_t use, uint64_t capacity) | |
770 | { | |
771 | struct lttng_evaluation_buffer_usage *usage; | |
772 | ||
773 | usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage)); | |
774 | if (!usage) { | |
775 | goto end; | |
776 | } | |
777 | ||
778 | usage->parent.type = type; | |
779 | usage->buffer_use = use; | |
780 | usage->buffer_capacity = capacity; | |
781 | usage->parent.serialize = lttng_evaluation_buffer_usage_serialize; | |
782 | usage->parent.destroy = lttng_evaluation_buffer_usage_destroy; | |
783 | end: | |
784 | return &usage->parent; | |
785 | } | |
786 | ||
787 | /* | |
788 | * Get the sampled buffer usage which caused the associated condition to | |
789 | * evaluate to "true". | |
790 | */ | |
791 | enum lttng_evaluation_status | |
792 | lttng_evaluation_buffer_usage_get_usage_ratio( | |
793 | const struct lttng_evaluation *evaluation, double *usage_ratio) | |
794 | { | |
795 | struct lttng_evaluation_buffer_usage *usage; | |
796 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
797 | ||
798 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_ratio) { | |
799 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
800 | goto end; | |
801 | } | |
802 | ||
803 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
804 | parent); | |
805 | *usage_ratio = (double) usage->buffer_use / | |
806 | (double) usage->buffer_capacity; | |
807 | end: | |
808 | return status; | |
809 | } | |
810 | ||
811 | enum lttng_evaluation_status | |
812 | lttng_evaluation_buffer_usage_get_usage( | |
813 | const struct lttng_evaluation *evaluation, | |
814 | uint64_t *usage_bytes) | |
815 | { | |
816 | struct lttng_evaluation_buffer_usage *usage; | |
817 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
818 | ||
819 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) { | |
820 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
821 | goto end; | |
822 | } | |
823 | ||
824 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
825 | parent); | |
826 | *usage_bytes = usage->buffer_use; | |
827 | end: | |
828 | return status; | |
829 | } |