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