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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 | } | |
91 | ||
92 | valid = true; | |
93 | end: | |
94 | return valid; | |
95 | } | |
96 | ||
97 | static | |
3647288f JG |
98 | int lttng_condition_buffer_usage_serialize( |
99 | const struct lttng_condition *condition, | |
100 | struct lttng_dynamic_buffer *buf) | |
a58c490f | 101 | { |
3647288f | 102 | int ret; |
a58c490f | 103 | struct lttng_condition_buffer_usage *usage; |
a58c490f | 104 | size_t session_name_len, channel_name_len; |
3647288f | 105 | struct lttng_condition_buffer_usage_comm usage_comm; |
a58c490f JG |
106 | |
107 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
108 | ret = -1; | |
109 | goto end; | |
110 | } | |
111 | ||
112 | DBG("Serializing buffer usage condition"); | |
113 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
114 | parent); | |
3647288f | 115 | |
a58c490f JG |
116 | session_name_len = strlen(usage->session_name) + 1; |
117 | channel_name_len = strlen(usage->channel_name) + 1; | |
118 | if (session_name_len > LTTNG_NAME_MAX || | |
119 | channel_name_len > LTTNG_NAME_MAX) { | |
120 | ret = -1; | |
121 | goto end; | |
122 | } | |
3647288f JG |
123 | |
124 | usage_comm.threshold_set_in_bytes = !!usage->threshold_bytes.set; | |
125 | usage_comm.session_name_len = session_name_len; | |
126 | usage_comm.channel_name_len = channel_name_len; | |
127 | usage_comm.domain_type = (int8_t) usage->domain.type; | |
128 | ||
129 | if (usage->threshold_bytes.set) { | |
130 | usage_comm.threshold = usage->threshold_bytes.value; | |
131 | } else { | |
132 | uint64_t val = double_to_fixed( | |
133 | usage->threshold_ratio.value); | |
134 | ||
135 | if (val > UINT32_MAX) { | |
136 | /* overflow. */ | |
137 | ret = -1; | |
138 | goto end; | |
a58c490f | 139 | } |
3647288f JG |
140 | usage_comm.threshold = val; |
141 | } | |
a58c490f | 142 | |
3647288f JG |
143 | ret = lttng_dynamic_buffer_append(buf, &usage_comm, |
144 | sizeof(usage_comm)); | |
145 | if (ret) { | |
146 | goto end; | |
147 | } | |
148 | ret = lttng_dynamic_buffer_append(buf, usage->session_name, | |
149 | session_name_len); | |
150 | if (ret) { | |
151 | goto end; | |
152 | } | |
153 | ret = lttng_dynamic_buffer_append(buf, usage->channel_name, | |
154 | channel_name_len); | |
155 | if (ret) { | |
156 | goto end; | |
a58c490f | 157 | } |
a58c490f JG |
158 | end: |
159 | return ret; | |
160 | } | |
161 | ||
162 | static | |
163 | bool lttng_condition_buffer_usage_is_equal(const struct lttng_condition *_a, | |
164 | const struct lttng_condition *_b) | |
165 | { | |
166 | bool is_equal = false; | |
167 | struct lttng_condition_buffer_usage *a, *b; | |
168 | ||
169 | a = container_of(_a, struct lttng_condition_buffer_usage, parent); | |
170 | b = container_of(_b, struct lttng_condition_buffer_usage, parent); | |
171 | ||
172 | if ((a->threshold_ratio.set && !b->threshold_ratio.set) || | |
173 | (a->threshold_bytes.set && !b->threshold_bytes.set)) { | |
174 | goto end; | |
175 | } | |
176 | ||
177 | if (a->threshold_ratio.set && b->threshold_ratio.set) { | |
178 | double a_value, b_value, diff; | |
179 | ||
180 | a_value = a->threshold_ratio.value; | |
181 | b_value = b->threshold_ratio.value; | |
182 | diff = fabs(a_value - b_value); | |
183 | ||
184 | if (diff > DBL_EPSILON) { | |
185 | goto end; | |
186 | } | |
187 | } else if (a->threshold_bytes.set && b->threshold_bytes.set) { | |
188 | uint64_t a_value, b_value; | |
189 | ||
190 | a_value = a->threshold_bytes.value; | |
191 | b_value = b->threshold_bytes.value; | |
192 | if (a_value != b_value) { | |
193 | goto end; | |
194 | } | |
195 | } | |
196 | ||
197 | if ((a->session_name && !b->session_name) || | |
198 | (!a->session_name && b->session_name)) { | |
199 | goto end; | |
200 | } | |
201 | ||
202 | if (a->channel_name && b->channel_name) { | |
203 | if (strcmp(a->channel_name, b->channel_name)) { | |
204 | goto end; | |
205 | } | |
206 | } if ((a->channel_name && !b->channel_name) || | |
207 | (!a->channel_name && b->channel_name)) { | |
208 | goto end; | |
209 | } | |
210 | ||
211 | if (a->channel_name && b->channel_name) { | |
212 | if (strcmp(a->channel_name, b->channel_name)) { | |
213 | goto end; | |
214 | } | |
215 | } | |
216 | ||
217 | if ((a->domain.set && !b->domain.set) || | |
218 | (!a->domain.set && b->domain.set)) { | |
219 | goto end; | |
220 | } | |
221 | ||
222 | if (a->domain.set && b->domain.set) { | |
223 | if (a->domain.type != b->domain.type) { | |
224 | goto end; | |
225 | } | |
226 | } | |
227 | is_equal = true; | |
228 | end: | |
229 | return is_equal; | |
230 | } | |
231 | ||
232 | static | |
233 | struct lttng_condition *lttng_condition_buffer_usage_create( | |
234 | enum lttng_condition_type type) | |
235 | { | |
236 | struct lttng_condition_buffer_usage *condition; | |
237 | ||
238 | condition = zmalloc(sizeof(struct lttng_condition_buffer_usage)); | |
239 | if (!condition) { | |
9a09eef5 | 240 | return NULL; |
a58c490f JG |
241 | } |
242 | ||
243 | lttng_condition_init(&condition->parent, type); | |
244 | condition->parent.validate = lttng_condition_buffer_usage_validate; | |
245 | condition->parent.serialize = lttng_condition_buffer_usage_serialize; | |
246 | condition->parent.equal = lttng_condition_buffer_usage_is_equal; | |
247 | condition->parent.destroy = lttng_condition_buffer_usage_destroy; | |
a58c490f JG |
248 | return &condition->parent; |
249 | } | |
250 | ||
251 | struct lttng_condition *lttng_condition_buffer_usage_low_create(void) | |
252 | { | |
253 | return lttng_condition_buffer_usage_create( | |
254 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW); | |
255 | } | |
256 | ||
257 | struct lttng_condition *lttng_condition_buffer_usage_high_create(void) | |
258 | { | |
259 | return lttng_condition_buffer_usage_create( | |
260 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH); | |
261 | } | |
262 | ||
263 | static | |
264 | ssize_t init_condition_from_buffer(struct lttng_condition *condition, | |
265 | const struct lttng_buffer_view *src_view) | |
266 | { | |
267 | ssize_t ret, condition_size; | |
268 | enum lttng_condition_status status; | |
269 | enum lttng_domain_type domain_type; | |
270 | const struct lttng_condition_buffer_usage_comm *condition_comm; | |
271 | const char *session_name, *channel_name; | |
272 | struct lttng_buffer_view names_view; | |
273 | ||
274 | if (src_view->size < sizeof(*condition_comm)) { | |
275 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); | |
276 | ret = -1; | |
277 | goto end; | |
278 | } | |
279 | ||
280 | condition_comm = (const struct lttng_condition_buffer_usage_comm *) src_view->data; | |
281 | names_view = lttng_buffer_view_from_view(src_view, | |
282 | sizeof(*condition_comm), -1); | |
283 | ||
284 | if (condition_comm->session_name_len > LTTNG_NAME_MAX || | |
285 | condition_comm->channel_name_len > LTTNG_NAME_MAX) { | |
286 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); | |
287 | ret = -1; | |
288 | goto end; | |
289 | } | |
290 | ||
291 | if (names_view.size < | |
292 | (condition_comm->session_name_len + | |
293 | condition_comm->channel_name_len)) { | |
294 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); | |
295 | ret = -1; | |
296 | goto end; | |
297 | } | |
298 | ||
299 | if (condition_comm->threshold_set_in_bytes) { | |
300 | status = lttng_condition_buffer_usage_set_threshold(condition, | |
301 | condition_comm->threshold); | |
302 | } else { | |
303 | status = lttng_condition_buffer_usage_set_threshold_ratio( | |
304 | condition, | |
305 | fixed_to_double(condition_comm->threshold)); | |
306 | } | |
307 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
308 | ERR("Failed to initialize buffer usage condition threshold"); | |
309 | ret = -1; | |
310 | goto end; | |
311 | } | |
312 | ||
313 | if (condition_comm->domain_type <= LTTNG_DOMAIN_NONE || | |
314 | condition_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
315 | /* Invalid domain value. */ | |
316 | ERR("Invalid domain type value (%i) found in condition buffer", | |
317 | (int) condition_comm->domain_type); | |
318 | ret = -1; | |
319 | goto end; | |
320 | } | |
321 | ||
322 | domain_type = (enum lttng_domain_type) condition_comm->domain_type; | |
323 | status = lttng_condition_buffer_usage_set_domain_type(condition, | |
324 | domain_type); | |
325 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
326 | ERR("Failed to set buffer usage condition domain"); | |
327 | ret = -1; | |
328 | goto end; | |
329 | } | |
330 | ||
331 | session_name = names_view.data; | |
332 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { | |
333 | ERR("Malformed session name encountered in condition buffer"); | |
334 | ret = -1; | |
335 | goto end; | |
336 | } | |
337 | ||
338 | channel_name = session_name + condition_comm->session_name_len; | |
339 | if (*(channel_name + condition_comm->channel_name_len - 1) != '\0') { | |
340 | ERR("Malformed channel name encountered in condition buffer"); | |
341 | ret = -1; | |
342 | goto end; | |
343 | } | |
344 | ||
345 | status = lttng_condition_buffer_usage_set_session_name(condition, | |
346 | session_name); | |
347 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
348 | ERR("Failed to set buffer usage session name"); | |
349 | ret = -1; | |
350 | goto end; | |
351 | } | |
352 | ||
353 | status = lttng_condition_buffer_usage_set_channel_name(condition, | |
354 | channel_name); | |
355 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
356 | ERR("Failed to set buffer usage channel name"); | |
357 | ret = -1; | |
358 | goto end; | |
359 | } | |
360 | ||
361 | if (!lttng_condition_validate(condition)) { | |
362 | ret = -1; | |
363 | goto end; | |
364 | } | |
365 | ||
366 | condition_size = sizeof(*condition_comm) + | |
367 | (ssize_t) condition_comm->session_name_len + | |
368 | (ssize_t) condition_comm->channel_name_len; | |
369 | ret = condition_size; | |
370 | end: | |
371 | return ret; | |
372 | } | |
373 | ||
374 | LTTNG_HIDDEN | |
375 | ssize_t lttng_condition_buffer_usage_low_create_from_buffer( | |
376 | const struct lttng_buffer_view *view, | |
377 | struct lttng_condition **_condition) | |
378 | { | |
379 | ssize_t ret; | |
380 | struct lttng_condition *condition = | |
381 | lttng_condition_buffer_usage_low_create(); | |
382 | ||
383 | if (!_condition || !condition) { | |
384 | ret = -1; | |
385 | goto error; | |
386 | } | |
387 | ||
388 | ret = init_condition_from_buffer(condition, view); | |
389 | if (ret < 0) { | |
390 | goto error; | |
391 | } | |
392 | ||
393 | *_condition = condition; | |
394 | return ret; | |
395 | error: | |
396 | lttng_condition_destroy(condition); | |
397 | return ret; | |
398 | } | |
399 | ||
400 | LTTNG_HIDDEN | |
401 | ssize_t lttng_condition_buffer_usage_high_create_from_buffer( | |
402 | const struct lttng_buffer_view *view, | |
403 | struct lttng_condition **_condition) | |
404 | { | |
405 | ssize_t ret; | |
406 | struct lttng_condition *condition = | |
407 | lttng_condition_buffer_usage_high_create(); | |
408 | ||
409 | if (!_condition || !condition) { | |
410 | ret = -1; | |
411 | goto error; | |
412 | } | |
413 | ||
414 | ret = init_condition_from_buffer(condition, view); | |
415 | if (ret < 0) { | |
416 | goto error; | |
417 | } | |
418 | ||
419 | *_condition = condition; | |
420 | return ret; | |
421 | error: | |
422 | lttng_condition_destroy(condition); | |
423 | return ret; | |
424 | } | |
425 | ||
426 | static | |
427 | struct lttng_evaluation *create_evaluation_from_buffer( | |
428 | enum lttng_condition_type type, | |
429 | const struct lttng_buffer_view *view) | |
430 | { | |
431 | const struct lttng_evaluation_buffer_usage_comm *comm = | |
432 | (const struct lttng_evaluation_buffer_usage_comm *) view->data; | |
433 | struct lttng_evaluation *evaluation = NULL; | |
434 | ||
435 | if (view->size < sizeof(*comm)) { | |
436 | goto end; | |
437 | } | |
438 | ||
439 | evaluation = lttng_evaluation_buffer_usage_create(type, | |
440 | comm->buffer_use, comm->buffer_capacity); | |
441 | end: | |
442 | return evaluation; | |
443 | } | |
444 | ||
445 | LTTNG_HIDDEN | |
446 | ssize_t lttng_evaluation_buffer_usage_low_create_from_buffer( | |
447 | const struct lttng_buffer_view *view, | |
448 | struct lttng_evaluation **_evaluation) | |
449 | { | |
450 | ssize_t ret; | |
451 | struct lttng_evaluation *evaluation = NULL; | |
452 | ||
453 | if (!_evaluation) { | |
454 | ret = -1; | |
455 | goto error; | |
456 | } | |
457 | ||
458 | evaluation = create_evaluation_from_buffer( | |
459 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW, view); | |
460 | if (!evaluation) { | |
461 | ret = -1; | |
462 | goto error; | |
463 | } | |
464 | ||
465 | *_evaluation = evaluation; | |
466 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
467 | return ret; | |
468 | error: | |
469 | lttng_evaluation_destroy(evaluation); | |
470 | return ret; | |
471 | } | |
472 | ||
473 | LTTNG_HIDDEN | |
474 | ssize_t lttng_evaluation_buffer_usage_high_create_from_buffer( | |
475 | const struct lttng_buffer_view *view, | |
476 | struct lttng_evaluation **_evaluation) | |
477 | { | |
478 | ssize_t ret; | |
479 | struct lttng_evaluation *evaluation = NULL; | |
480 | ||
481 | if (!_evaluation) { | |
482 | ret = -1; | |
483 | goto error; | |
484 | } | |
485 | ||
486 | evaluation = create_evaluation_from_buffer( | |
487 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH, view); | |
488 | if (!evaluation) { | |
489 | ret = -1; | |
490 | goto error; | |
491 | } | |
492 | ||
493 | *_evaluation = evaluation; | |
494 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
495 | return ret; | |
496 | error: | |
497 | lttng_evaluation_destroy(evaluation); | |
498 | return ret; | |
499 | } | |
500 | ||
501 | enum lttng_condition_status | |
502 | lttng_condition_buffer_usage_get_threshold_ratio( | |
503 | const struct lttng_condition *condition, | |
504 | double *threshold_ratio) | |
505 | { | |
506 | struct lttng_condition_buffer_usage *usage; | |
507 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
508 | ||
509 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
510 | !threshold_ratio) { | |
511 | status = LTTNG_CONDITION_STATUS_INVALID; | |
512 | goto end; | |
513 | } | |
514 | ||
515 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
516 | parent); | |
517 | if (!usage->threshold_ratio.set) { | |
518 | status = LTTNG_CONDITION_STATUS_UNSET; | |
519 | goto end; | |
520 | } | |
521 | *threshold_ratio = usage->threshold_ratio.value; | |
522 | end: | |
523 | return status; | |
524 | } | |
525 | ||
526 | /* threshold_ratio expressed as [0.0, 1.0]. */ | |
527 | enum lttng_condition_status | |
528 | lttng_condition_buffer_usage_set_threshold_ratio( | |
529 | struct lttng_condition *condition, double threshold_ratio) | |
530 | { | |
531 | struct lttng_condition_buffer_usage *usage; | |
532 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
533 | ||
534 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
535 | threshold_ratio < 0.0 || | |
536 | threshold_ratio > 1.0) { | |
537 | status = LTTNG_CONDITION_STATUS_INVALID; | |
538 | goto end; | |
539 | } | |
540 | ||
541 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
542 | parent); | |
543 | usage->threshold_ratio.set = true; | |
544 | usage->threshold_bytes.set = false; | |
545 | usage->threshold_ratio.value = threshold_ratio; | |
546 | end: | |
547 | return status; | |
548 | } | |
549 | ||
550 | enum lttng_condition_status | |
551 | lttng_condition_buffer_usage_get_threshold( | |
552 | const struct lttng_condition *condition, | |
553 | uint64_t *threshold_bytes) | |
554 | { | |
555 | struct lttng_condition_buffer_usage *usage; | |
556 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
557 | ||
558 | if (!condition || !IS_USAGE_CONDITION(condition) || !threshold_bytes) { | |
559 | status = LTTNG_CONDITION_STATUS_INVALID; | |
560 | goto end; | |
561 | } | |
562 | ||
563 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
564 | parent); | |
565 | if (!usage->threshold_bytes.set) { | |
566 | status = LTTNG_CONDITION_STATUS_UNSET; | |
567 | goto end; | |
568 | } | |
569 | *threshold_bytes = usage->threshold_bytes.value; | |
570 | end: | |
571 | return status; | |
572 | } | |
573 | ||
574 | enum lttng_condition_status | |
575 | lttng_condition_buffer_usage_set_threshold( | |
576 | struct lttng_condition *condition, uint64_t threshold_bytes) | |
577 | { | |
578 | struct lttng_condition_buffer_usage *usage; | |
579 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
580 | ||
581 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
582 | status = LTTNG_CONDITION_STATUS_INVALID; | |
583 | goto end; | |
584 | } | |
585 | ||
586 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
587 | parent); | |
588 | usage->threshold_ratio.set = false; | |
589 | usage->threshold_bytes.set = true; | |
590 | usage->threshold_bytes.value = threshold_bytes; | |
591 | end: | |
592 | return status; | |
593 | } | |
594 | ||
595 | enum lttng_condition_status | |
596 | lttng_condition_buffer_usage_get_session_name( | |
597 | const struct lttng_condition *condition, | |
598 | const char **session_name) | |
599 | { | |
600 | struct lttng_condition_buffer_usage *usage; | |
601 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
602 | ||
603 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name) { | |
604 | status = LTTNG_CONDITION_STATUS_INVALID; | |
605 | goto end; | |
606 | } | |
607 | ||
608 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
609 | parent); | |
610 | if (!usage->session_name) { | |
611 | status = LTTNG_CONDITION_STATUS_UNSET; | |
612 | goto end; | |
613 | } | |
614 | *session_name = usage->session_name; | |
615 | end: | |
616 | return status; | |
617 | } | |
618 | ||
619 | enum lttng_condition_status | |
620 | lttng_condition_buffer_usage_set_session_name( | |
621 | struct lttng_condition *condition, const char *session_name) | |
622 | { | |
623 | char *session_name_copy; | |
624 | struct lttng_condition_buffer_usage *usage; | |
625 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
626 | ||
627 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name || | |
628 | strlen(session_name) == 0) { | |
629 | status = LTTNG_CONDITION_STATUS_INVALID; | |
630 | goto end; | |
631 | } | |
632 | ||
633 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
634 | parent); | |
635 | session_name_copy = strdup(session_name); | |
636 | if (!session_name_copy) { | |
637 | status = LTTNG_CONDITION_STATUS_ERROR; | |
638 | goto end; | |
639 | } | |
640 | ||
641 | if (usage->session_name) { | |
642 | free(usage->session_name); | |
643 | } | |
644 | usage->session_name = session_name_copy; | |
645 | end: | |
646 | return status; | |
647 | } | |
648 | ||
649 | enum lttng_condition_status | |
650 | lttng_condition_buffer_usage_get_channel_name( | |
651 | const struct lttng_condition *condition, | |
652 | const char **channel_name) | |
653 | { | |
654 | struct lttng_condition_buffer_usage *usage; | |
655 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
656 | ||
657 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name) { | |
658 | status = LTTNG_CONDITION_STATUS_INVALID; | |
659 | goto end; | |
660 | } | |
661 | ||
662 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
663 | parent); | |
664 | if (!usage->channel_name) { | |
665 | status = LTTNG_CONDITION_STATUS_UNSET; | |
666 | goto end; | |
667 | } | |
668 | *channel_name = usage->channel_name; | |
669 | end: | |
670 | return status; | |
671 | } | |
672 | ||
673 | enum lttng_condition_status | |
674 | lttng_condition_buffer_usage_set_channel_name( | |
675 | struct lttng_condition *condition, const char *channel_name) | |
676 | { | |
677 | char *channel_name_copy; | |
678 | struct lttng_condition_buffer_usage *usage; | |
679 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
680 | ||
681 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name || | |
682 | strlen(channel_name) == 0) { | |
683 | status = LTTNG_CONDITION_STATUS_INVALID; | |
684 | goto end; | |
685 | } | |
686 | ||
687 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
688 | parent); | |
689 | channel_name_copy = strdup(channel_name); | |
690 | if (!channel_name_copy) { | |
691 | status = LTTNG_CONDITION_STATUS_ERROR; | |
692 | goto end; | |
693 | } | |
694 | ||
695 | if (usage->channel_name) { | |
696 | free(usage->channel_name); | |
697 | } | |
698 | usage->channel_name = channel_name_copy; | |
699 | end: | |
700 | return status; | |
701 | } | |
702 | ||
703 | enum lttng_condition_status | |
704 | lttng_condition_buffer_usage_get_domain_type( | |
705 | const struct lttng_condition *condition, | |
706 | enum lttng_domain_type *type) | |
707 | { | |
708 | struct lttng_condition_buffer_usage *usage; | |
709 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
710 | ||
711 | if (!condition || !IS_USAGE_CONDITION(condition) || !type) { | |
712 | status = LTTNG_CONDITION_STATUS_INVALID; | |
713 | goto end; | |
714 | } | |
715 | ||
716 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
717 | parent); | |
718 | if (!usage->domain.set) { | |
719 | status = LTTNG_CONDITION_STATUS_UNSET; | |
720 | goto end; | |
721 | } | |
722 | *type = usage->domain.type; | |
723 | end: | |
724 | return status; | |
725 | } | |
726 | ||
727 | enum lttng_condition_status | |
728 | lttng_condition_buffer_usage_set_domain_type( | |
729 | struct lttng_condition *condition, enum lttng_domain_type type) | |
730 | { | |
731 | struct lttng_condition_buffer_usage *usage; | |
732 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
733 | ||
734 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
735 | type == LTTNG_DOMAIN_NONE) { | |
736 | status = LTTNG_CONDITION_STATUS_INVALID; | |
737 | goto end; | |
738 | } | |
739 | ||
740 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
741 | parent); | |
742 | usage->domain.set = true; | |
743 | usage->domain.type = type; | |
744 | end: | |
745 | return status; | |
746 | } | |
747 | ||
748 | static | |
3647288f JG |
749 | int lttng_evaluation_buffer_usage_serialize( |
750 | struct lttng_evaluation *evaluation, | |
751 | struct lttng_dynamic_buffer *buf) | |
a58c490f | 752 | { |
a58c490f | 753 | struct lttng_evaluation_buffer_usage *usage; |
3647288f | 754 | struct lttng_evaluation_buffer_usage_comm comm; |
a58c490f JG |
755 | |
756 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
757 | parent); | |
3647288f JG |
758 | comm.buffer_use = usage->buffer_use; |
759 | comm.buffer_capacity = usage->buffer_capacity; | |
a58c490f | 760 | |
3647288f | 761 | return lttng_dynamic_buffer_append(buf, &comm, sizeof(comm)); |
a58c490f JG |
762 | } |
763 | ||
764 | static | |
765 | void lttng_evaluation_buffer_usage_destroy( | |
766 | struct lttng_evaluation *evaluation) | |
767 | { | |
768 | struct lttng_evaluation_buffer_usage *usage; | |
769 | ||
770 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
771 | parent); | |
772 | free(usage); | |
773 | } | |
774 | ||
775 | LTTNG_HIDDEN | |
776 | struct lttng_evaluation *lttng_evaluation_buffer_usage_create( | |
777 | enum lttng_condition_type type, uint64_t use, uint64_t capacity) | |
778 | { | |
779 | struct lttng_evaluation_buffer_usage *usage; | |
780 | ||
781 | usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage)); | |
782 | if (!usage) { | |
783 | goto end; | |
784 | } | |
785 | ||
786 | usage->parent.type = type; | |
787 | usage->buffer_use = use; | |
788 | usage->buffer_capacity = capacity; | |
789 | usage->parent.serialize = lttng_evaluation_buffer_usage_serialize; | |
790 | usage->parent.destroy = lttng_evaluation_buffer_usage_destroy; | |
791 | end: | |
792 | return &usage->parent; | |
793 | } | |
794 | ||
795 | /* | |
796 | * Get the sampled buffer usage which caused the associated condition to | |
797 | * evaluate to "true". | |
798 | */ | |
799 | enum lttng_evaluation_status | |
800 | lttng_evaluation_buffer_usage_get_usage_ratio( | |
801 | const struct lttng_evaluation *evaluation, double *usage_ratio) | |
802 | { | |
803 | struct lttng_evaluation_buffer_usage *usage; | |
804 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
805 | ||
806 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_ratio) { | |
807 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
808 | goto end; | |
809 | } | |
810 | ||
811 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
812 | parent); | |
813 | *usage_ratio = (double) usage->buffer_use / | |
814 | (double) usage->buffer_capacity; | |
815 | end: | |
816 | return status; | |
817 | } | |
818 | ||
819 | enum lttng_evaluation_status | |
820 | lttng_evaluation_buffer_usage_get_usage( | |
821 | const struct lttng_evaluation *evaluation, | |
822 | uint64_t *usage_bytes) | |
823 | { | |
824 | struct lttng_evaluation_buffer_usage *usage; | |
825 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
826 | ||
827 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) { | |
828 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
829 | goto end; | |
830 | } | |
831 | ||
832 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
833 | parent); | |
834 | *usage_bytes = usage->buffer_use; | |
835 | end: | |
836 | return status; | |
837 | } |