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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); | |
149 | buf += channel_name_len; | |
150 | } | |
151 | ret = size; | |
152 | end: | |
153 | return ret; | |
154 | } | |
155 | ||
156 | static | |
157 | bool lttng_condition_buffer_usage_is_equal(const struct lttng_condition *_a, | |
158 | const struct lttng_condition *_b) | |
159 | { | |
160 | bool is_equal = false; | |
161 | struct lttng_condition_buffer_usage *a, *b; | |
162 | ||
163 | a = container_of(_a, struct lttng_condition_buffer_usage, parent); | |
164 | b = container_of(_b, struct lttng_condition_buffer_usage, parent); | |
165 | ||
166 | if ((a->threshold_ratio.set && !b->threshold_ratio.set) || | |
167 | (a->threshold_bytes.set && !b->threshold_bytes.set)) { | |
168 | goto end; | |
169 | } | |
170 | ||
171 | if (a->threshold_ratio.set && b->threshold_ratio.set) { | |
172 | double a_value, b_value, diff; | |
173 | ||
174 | a_value = a->threshold_ratio.value; | |
175 | b_value = b->threshold_ratio.value; | |
176 | diff = fabs(a_value - b_value); | |
177 | ||
178 | if (diff > DBL_EPSILON) { | |
179 | goto end; | |
180 | } | |
181 | } else if (a->threshold_bytes.set && b->threshold_bytes.set) { | |
182 | uint64_t a_value, b_value; | |
183 | ||
184 | a_value = a->threshold_bytes.value; | |
185 | b_value = b->threshold_bytes.value; | |
186 | if (a_value != b_value) { | |
187 | goto end; | |
188 | } | |
189 | } | |
190 | ||
191 | if ((a->session_name && !b->session_name) || | |
192 | (!a->session_name && b->session_name)) { | |
193 | goto end; | |
194 | } | |
195 | ||
196 | if (a->channel_name && b->channel_name) { | |
197 | if (strcmp(a->channel_name, b->channel_name)) { | |
198 | goto end; | |
199 | } | |
200 | } if ((a->channel_name && !b->channel_name) || | |
201 | (!a->channel_name && b->channel_name)) { | |
202 | goto end; | |
203 | } | |
204 | ||
205 | if (a->channel_name && b->channel_name) { | |
206 | if (strcmp(a->channel_name, b->channel_name)) { | |
207 | goto end; | |
208 | } | |
209 | } | |
210 | ||
211 | if ((a->domain.set && !b->domain.set) || | |
212 | (!a->domain.set && b->domain.set)) { | |
213 | goto end; | |
214 | } | |
215 | ||
216 | if (a->domain.set && b->domain.set) { | |
217 | if (a->domain.type != b->domain.type) { | |
218 | goto end; | |
219 | } | |
220 | } | |
221 | is_equal = true; | |
222 | end: | |
223 | return is_equal; | |
224 | } | |
225 | ||
226 | static | |
227 | struct lttng_condition *lttng_condition_buffer_usage_create( | |
228 | enum lttng_condition_type type) | |
229 | { | |
230 | struct lttng_condition_buffer_usage *condition; | |
231 | ||
232 | condition = zmalloc(sizeof(struct lttng_condition_buffer_usage)); | |
233 | if (!condition) { | |
234 | goto end; | |
235 | } | |
236 | ||
237 | lttng_condition_init(&condition->parent, type); | |
238 | condition->parent.validate = lttng_condition_buffer_usage_validate; | |
239 | condition->parent.serialize = lttng_condition_buffer_usage_serialize; | |
240 | condition->parent.equal = lttng_condition_buffer_usage_is_equal; | |
241 | condition->parent.destroy = lttng_condition_buffer_usage_destroy; | |
242 | end: | |
243 | return &condition->parent; | |
244 | } | |
245 | ||
246 | struct lttng_condition *lttng_condition_buffer_usage_low_create(void) | |
247 | { | |
248 | return lttng_condition_buffer_usage_create( | |
249 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW); | |
250 | } | |
251 | ||
252 | struct lttng_condition *lttng_condition_buffer_usage_high_create(void) | |
253 | { | |
254 | return lttng_condition_buffer_usage_create( | |
255 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH); | |
256 | } | |
257 | ||
258 | static | |
259 | ssize_t init_condition_from_buffer(struct lttng_condition *condition, | |
260 | const struct lttng_buffer_view *src_view) | |
261 | { | |
262 | ssize_t ret, condition_size; | |
263 | enum lttng_condition_status status; | |
264 | enum lttng_domain_type domain_type; | |
265 | const struct lttng_condition_buffer_usage_comm *condition_comm; | |
266 | const char *session_name, *channel_name; | |
267 | struct lttng_buffer_view names_view; | |
268 | ||
269 | if (src_view->size < sizeof(*condition_comm)) { | |
270 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); | |
271 | ret = -1; | |
272 | goto end; | |
273 | } | |
274 | ||
275 | condition_comm = (const struct lttng_condition_buffer_usage_comm *) src_view->data; | |
276 | names_view = lttng_buffer_view_from_view(src_view, | |
277 | sizeof(*condition_comm), -1); | |
278 | ||
279 | if (condition_comm->session_name_len > LTTNG_NAME_MAX || | |
280 | condition_comm->channel_name_len > LTTNG_NAME_MAX) { | |
281 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); | |
282 | ret = -1; | |
283 | goto end; | |
284 | } | |
285 | ||
286 | if (names_view.size < | |
287 | (condition_comm->session_name_len + | |
288 | condition_comm->channel_name_len)) { | |
289 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); | |
290 | ret = -1; | |
291 | goto end; | |
292 | } | |
293 | ||
294 | if (condition_comm->threshold_set_in_bytes) { | |
295 | status = lttng_condition_buffer_usage_set_threshold(condition, | |
296 | condition_comm->threshold); | |
297 | } else { | |
298 | status = lttng_condition_buffer_usage_set_threshold_ratio( | |
299 | condition, | |
300 | fixed_to_double(condition_comm->threshold)); | |
301 | } | |
302 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
303 | ERR("Failed to initialize buffer usage condition threshold"); | |
304 | ret = -1; | |
305 | goto end; | |
306 | } | |
307 | ||
308 | if (condition_comm->domain_type <= LTTNG_DOMAIN_NONE || | |
309 | condition_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
310 | /* Invalid domain value. */ | |
311 | ERR("Invalid domain type value (%i) found in condition buffer", | |
312 | (int) condition_comm->domain_type); | |
313 | ret = -1; | |
314 | goto end; | |
315 | } | |
316 | ||
317 | domain_type = (enum lttng_domain_type) condition_comm->domain_type; | |
318 | status = lttng_condition_buffer_usage_set_domain_type(condition, | |
319 | domain_type); | |
320 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
321 | ERR("Failed to set buffer usage condition domain"); | |
322 | ret = -1; | |
323 | goto end; | |
324 | } | |
325 | ||
326 | session_name = names_view.data; | |
327 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { | |
328 | ERR("Malformed session name encountered in condition buffer"); | |
329 | ret = -1; | |
330 | goto end; | |
331 | } | |
332 | ||
333 | channel_name = session_name + condition_comm->session_name_len; | |
334 | if (*(channel_name + condition_comm->channel_name_len - 1) != '\0') { | |
335 | ERR("Malformed channel name encountered in condition buffer"); | |
336 | ret = -1; | |
337 | goto end; | |
338 | } | |
339 | ||
340 | status = lttng_condition_buffer_usage_set_session_name(condition, | |
341 | session_name); | |
342 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
343 | ERR("Failed to set buffer usage session name"); | |
344 | ret = -1; | |
345 | goto end; | |
346 | } | |
347 | ||
348 | status = lttng_condition_buffer_usage_set_channel_name(condition, | |
349 | channel_name); | |
350 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
351 | ERR("Failed to set buffer usage channel name"); | |
352 | ret = -1; | |
353 | goto end; | |
354 | } | |
355 | ||
356 | if (!lttng_condition_validate(condition)) { | |
357 | ret = -1; | |
358 | goto end; | |
359 | } | |
360 | ||
361 | condition_size = sizeof(*condition_comm) + | |
362 | (ssize_t) condition_comm->session_name_len + | |
363 | (ssize_t) condition_comm->channel_name_len; | |
364 | ret = condition_size; | |
365 | end: | |
366 | return ret; | |
367 | } | |
368 | ||
369 | LTTNG_HIDDEN | |
370 | ssize_t lttng_condition_buffer_usage_low_create_from_buffer( | |
371 | const struct lttng_buffer_view *view, | |
372 | struct lttng_condition **_condition) | |
373 | { | |
374 | ssize_t ret; | |
375 | struct lttng_condition *condition = | |
376 | lttng_condition_buffer_usage_low_create(); | |
377 | ||
378 | if (!_condition || !condition) { | |
379 | ret = -1; | |
380 | goto error; | |
381 | } | |
382 | ||
383 | ret = init_condition_from_buffer(condition, view); | |
384 | if (ret < 0) { | |
385 | goto error; | |
386 | } | |
387 | ||
388 | *_condition = condition; | |
389 | return ret; | |
390 | error: | |
391 | lttng_condition_destroy(condition); | |
392 | return ret; | |
393 | } | |
394 | ||
395 | LTTNG_HIDDEN | |
396 | ssize_t lttng_condition_buffer_usage_high_create_from_buffer( | |
397 | const struct lttng_buffer_view *view, | |
398 | struct lttng_condition **_condition) | |
399 | { | |
400 | ssize_t ret; | |
401 | struct lttng_condition *condition = | |
402 | lttng_condition_buffer_usage_high_create(); | |
403 | ||
404 | if (!_condition || !condition) { | |
405 | ret = -1; | |
406 | goto error; | |
407 | } | |
408 | ||
409 | ret = init_condition_from_buffer(condition, view); | |
410 | if (ret < 0) { | |
411 | goto error; | |
412 | } | |
413 | ||
414 | *_condition = condition; | |
415 | return ret; | |
416 | error: | |
417 | lttng_condition_destroy(condition); | |
418 | return ret; | |
419 | } | |
420 | ||
421 | static | |
422 | struct lttng_evaluation *create_evaluation_from_buffer( | |
423 | enum lttng_condition_type type, | |
424 | const struct lttng_buffer_view *view) | |
425 | { | |
426 | const struct lttng_evaluation_buffer_usage_comm *comm = | |
427 | (const struct lttng_evaluation_buffer_usage_comm *) view->data; | |
428 | struct lttng_evaluation *evaluation = NULL; | |
429 | ||
430 | if (view->size < sizeof(*comm)) { | |
431 | goto end; | |
432 | } | |
433 | ||
434 | evaluation = lttng_evaluation_buffer_usage_create(type, | |
435 | comm->buffer_use, comm->buffer_capacity); | |
436 | end: | |
437 | return evaluation; | |
438 | } | |
439 | ||
440 | LTTNG_HIDDEN | |
441 | ssize_t lttng_evaluation_buffer_usage_low_create_from_buffer( | |
442 | const struct lttng_buffer_view *view, | |
443 | struct lttng_evaluation **_evaluation) | |
444 | { | |
445 | ssize_t ret; | |
446 | struct lttng_evaluation *evaluation = NULL; | |
447 | ||
448 | if (!_evaluation) { | |
449 | ret = -1; | |
450 | goto error; | |
451 | } | |
452 | ||
453 | evaluation = create_evaluation_from_buffer( | |
454 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW, view); | |
455 | if (!evaluation) { | |
456 | ret = -1; | |
457 | goto error; | |
458 | } | |
459 | ||
460 | *_evaluation = evaluation; | |
461 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
462 | return ret; | |
463 | error: | |
464 | lttng_evaluation_destroy(evaluation); | |
465 | return ret; | |
466 | } | |
467 | ||
468 | LTTNG_HIDDEN | |
469 | ssize_t lttng_evaluation_buffer_usage_high_create_from_buffer( | |
470 | const struct lttng_buffer_view *view, | |
471 | struct lttng_evaluation **_evaluation) | |
472 | { | |
473 | ssize_t ret; | |
474 | struct lttng_evaluation *evaluation = NULL; | |
475 | ||
476 | if (!_evaluation) { | |
477 | ret = -1; | |
478 | goto error; | |
479 | } | |
480 | ||
481 | evaluation = create_evaluation_from_buffer( | |
482 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH, view); | |
483 | if (!evaluation) { | |
484 | ret = -1; | |
485 | goto error; | |
486 | } | |
487 | ||
488 | *_evaluation = evaluation; | |
489 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
490 | return ret; | |
491 | error: | |
492 | lttng_evaluation_destroy(evaluation); | |
493 | return ret; | |
494 | } | |
495 | ||
496 | enum lttng_condition_status | |
497 | lttng_condition_buffer_usage_get_threshold_ratio( | |
498 | const struct lttng_condition *condition, | |
499 | double *threshold_ratio) | |
500 | { | |
501 | struct lttng_condition_buffer_usage *usage; | |
502 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
503 | ||
504 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
505 | !threshold_ratio) { | |
506 | status = LTTNG_CONDITION_STATUS_INVALID; | |
507 | goto end; | |
508 | } | |
509 | ||
510 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
511 | parent); | |
512 | if (!usage->threshold_ratio.set) { | |
513 | status = LTTNG_CONDITION_STATUS_UNSET; | |
514 | goto end; | |
515 | } | |
516 | *threshold_ratio = usage->threshold_ratio.value; | |
517 | end: | |
518 | return status; | |
519 | } | |
520 | ||
521 | /* threshold_ratio expressed as [0.0, 1.0]. */ | |
522 | enum lttng_condition_status | |
523 | lttng_condition_buffer_usage_set_threshold_ratio( | |
524 | struct lttng_condition *condition, double threshold_ratio) | |
525 | { | |
526 | struct lttng_condition_buffer_usage *usage; | |
527 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
528 | ||
529 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
530 | threshold_ratio < 0.0 || | |
531 | threshold_ratio > 1.0) { | |
532 | status = LTTNG_CONDITION_STATUS_INVALID; | |
533 | goto end; | |
534 | } | |
535 | ||
536 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
537 | parent); | |
538 | usage->threshold_ratio.set = true; | |
539 | usage->threshold_bytes.set = false; | |
540 | usage->threshold_ratio.value = threshold_ratio; | |
541 | end: | |
542 | return status; | |
543 | } | |
544 | ||
545 | enum lttng_condition_status | |
546 | lttng_condition_buffer_usage_get_threshold( | |
547 | const struct lttng_condition *condition, | |
548 | uint64_t *threshold_bytes) | |
549 | { | |
550 | struct lttng_condition_buffer_usage *usage; | |
551 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
552 | ||
553 | if (!condition || !IS_USAGE_CONDITION(condition) || !threshold_bytes) { | |
554 | status = LTTNG_CONDITION_STATUS_INVALID; | |
555 | goto end; | |
556 | } | |
557 | ||
558 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
559 | parent); | |
560 | if (!usage->threshold_bytes.set) { | |
561 | status = LTTNG_CONDITION_STATUS_UNSET; | |
562 | goto end; | |
563 | } | |
564 | *threshold_bytes = usage->threshold_bytes.value; | |
565 | end: | |
566 | return status; | |
567 | } | |
568 | ||
569 | enum lttng_condition_status | |
570 | lttng_condition_buffer_usage_set_threshold( | |
571 | struct lttng_condition *condition, uint64_t threshold_bytes) | |
572 | { | |
573 | struct lttng_condition_buffer_usage *usage; | |
574 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
575 | ||
576 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
577 | status = LTTNG_CONDITION_STATUS_INVALID; | |
578 | goto end; | |
579 | } | |
580 | ||
581 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
582 | parent); | |
583 | usage->threshold_ratio.set = false; | |
584 | usage->threshold_bytes.set = true; | |
585 | usage->threshold_bytes.value = threshold_bytes; | |
586 | end: | |
587 | return status; | |
588 | } | |
589 | ||
590 | enum lttng_condition_status | |
591 | lttng_condition_buffer_usage_get_session_name( | |
592 | const struct lttng_condition *condition, | |
593 | const char **session_name) | |
594 | { | |
595 | struct lttng_condition_buffer_usage *usage; | |
596 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
597 | ||
598 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name) { | |
599 | status = LTTNG_CONDITION_STATUS_INVALID; | |
600 | goto end; | |
601 | } | |
602 | ||
603 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
604 | parent); | |
605 | if (!usage->session_name) { | |
606 | status = LTTNG_CONDITION_STATUS_UNSET; | |
607 | goto end; | |
608 | } | |
609 | *session_name = usage->session_name; | |
610 | end: | |
611 | return status; | |
612 | } | |
613 | ||
614 | enum lttng_condition_status | |
615 | lttng_condition_buffer_usage_set_session_name( | |
616 | struct lttng_condition *condition, const char *session_name) | |
617 | { | |
618 | char *session_name_copy; | |
619 | struct lttng_condition_buffer_usage *usage; | |
620 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
621 | ||
622 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name || | |
623 | strlen(session_name) == 0) { | |
624 | status = LTTNG_CONDITION_STATUS_INVALID; | |
625 | goto end; | |
626 | } | |
627 | ||
628 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
629 | parent); | |
630 | session_name_copy = strdup(session_name); | |
631 | if (!session_name_copy) { | |
632 | status = LTTNG_CONDITION_STATUS_ERROR; | |
633 | goto end; | |
634 | } | |
635 | ||
636 | if (usage->session_name) { | |
637 | free(usage->session_name); | |
638 | } | |
639 | usage->session_name = session_name_copy; | |
640 | end: | |
641 | return status; | |
642 | } | |
643 | ||
644 | enum lttng_condition_status | |
645 | lttng_condition_buffer_usage_get_channel_name( | |
646 | const struct lttng_condition *condition, | |
647 | const char **channel_name) | |
648 | { | |
649 | struct lttng_condition_buffer_usage *usage; | |
650 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
651 | ||
652 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name) { | |
653 | status = LTTNG_CONDITION_STATUS_INVALID; | |
654 | goto end; | |
655 | } | |
656 | ||
657 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
658 | parent); | |
659 | if (!usage->channel_name) { | |
660 | status = LTTNG_CONDITION_STATUS_UNSET; | |
661 | goto end; | |
662 | } | |
663 | *channel_name = usage->channel_name; | |
664 | end: | |
665 | return status; | |
666 | } | |
667 | ||
668 | enum lttng_condition_status | |
669 | lttng_condition_buffer_usage_set_channel_name( | |
670 | struct lttng_condition *condition, const char *channel_name) | |
671 | { | |
672 | char *channel_name_copy; | |
673 | struct lttng_condition_buffer_usage *usage; | |
674 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
675 | ||
676 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name || | |
677 | strlen(channel_name) == 0) { | |
678 | status = LTTNG_CONDITION_STATUS_INVALID; | |
679 | goto end; | |
680 | } | |
681 | ||
682 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
683 | parent); | |
684 | channel_name_copy = strdup(channel_name); | |
685 | if (!channel_name_copy) { | |
686 | status = LTTNG_CONDITION_STATUS_ERROR; | |
687 | goto end; | |
688 | } | |
689 | ||
690 | if (usage->channel_name) { | |
691 | free(usage->channel_name); | |
692 | } | |
693 | usage->channel_name = channel_name_copy; | |
694 | end: | |
695 | return status; | |
696 | } | |
697 | ||
698 | enum lttng_condition_status | |
699 | lttng_condition_buffer_usage_get_domain_type( | |
700 | const struct lttng_condition *condition, | |
701 | enum lttng_domain_type *type) | |
702 | { | |
703 | struct lttng_condition_buffer_usage *usage; | |
704 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
705 | ||
706 | if (!condition || !IS_USAGE_CONDITION(condition) || !type) { | |
707 | status = LTTNG_CONDITION_STATUS_INVALID; | |
708 | goto end; | |
709 | } | |
710 | ||
711 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
712 | parent); | |
713 | if (!usage->domain.set) { | |
714 | status = LTTNG_CONDITION_STATUS_UNSET; | |
715 | goto end; | |
716 | } | |
717 | *type = usage->domain.type; | |
718 | end: | |
719 | return status; | |
720 | } | |
721 | ||
722 | enum lttng_condition_status | |
723 | lttng_condition_buffer_usage_set_domain_type( | |
724 | struct lttng_condition *condition, enum lttng_domain_type type) | |
725 | { | |
726 | struct lttng_condition_buffer_usage *usage; | |
727 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
728 | ||
729 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
730 | type == LTTNG_DOMAIN_NONE) { | |
731 | status = LTTNG_CONDITION_STATUS_INVALID; | |
732 | goto end; | |
733 | } | |
734 | ||
735 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
736 | parent); | |
737 | usage->domain.set = true; | |
738 | usage->domain.type = type; | |
739 | end: | |
740 | return status; | |
741 | } | |
742 | ||
743 | static | |
744 | ssize_t lttng_evaluation_buffer_usage_serialize( | |
745 | struct lttng_evaluation *evaluation, char *buf) | |
746 | { | |
747 | ssize_t ret; | |
748 | struct lttng_evaluation_buffer_usage *usage; | |
749 | ||
750 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
751 | parent); | |
752 | if (buf) { | |
753 | struct lttng_evaluation_buffer_usage_comm comm = { | |
754 | .buffer_use = usage->buffer_use, | |
755 | .buffer_capacity = usage->buffer_capacity, | |
756 | }; | |
757 | ||
758 | memcpy(buf, &comm, sizeof(comm)); | |
759 | } | |
760 | ||
761 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
762 | return ret; | |
763 | } | |
764 | ||
765 | static | |
766 | void lttng_evaluation_buffer_usage_destroy( | |
767 | struct lttng_evaluation *evaluation) | |
768 | { | |
769 | struct lttng_evaluation_buffer_usage *usage; | |
770 | ||
771 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
772 | parent); | |
773 | free(usage); | |
774 | } | |
775 | ||
776 | LTTNG_HIDDEN | |
777 | struct lttng_evaluation *lttng_evaluation_buffer_usage_create( | |
778 | enum lttng_condition_type type, uint64_t use, uint64_t capacity) | |
779 | { | |
780 | struct lttng_evaluation_buffer_usage *usage; | |
781 | ||
782 | usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage)); | |
783 | if (!usage) { | |
784 | goto end; | |
785 | } | |
786 | ||
787 | usage->parent.type = type; | |
788 | usage->buffer_use = use; | |
789 | usage->buffer_capacity = capacity; | |
790 | usage->parent.serialize = lttng_evaluation_buffer_usage_serialize; | |
791 | usage->parent.destroy = lttng_evaluation_buffer_usage_destroy; | |
792 | end: | |
793 | return &usage->parent; | |
794 | } | |
795 | ||
796 | /* | |
797 | * Get the sampled buffer usage which caused the associated condition to | |
798 | * evaluate to "true". | |
799 | */ | |
800 | enum lttng_evaluation_status | |
801 | lttng_evaluation_buffer_usage_get_usage_ratio( | |
802 | const struct lttng_evaluation *evaluation, double *usage_ratio) | |
803 | { | |
804 | struct lttng_evaluation_buffer_usage *usage; | |
805 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
806 | ||
807 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_ratio) { | |
808 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
809 | goto end; | |
810 | } | |
811 | ||
812 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
813 | parent); | |
814 | *usage_ratio = (double) usage->buffer_use / | |
815 | (double) usage->buffer_capacity; | |
816 | end: | |
817 | return status; | |
818 | } | |
819 | ||
820 | enum lttng_evaluation_status | |
821 | lttng_evaluation_buffer_usage_get_usage( | |
822 | const struct lttng_evaluation *evaluation, | |
823 | uint64_t *usage_bytes) | |
824 | { | |
825 | struct lttng_evaluation_buffer_usage *usage; | |
826 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
827 | ||
828 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) { | |
829 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
830 | goto end; | |
831 | } | |
832 | ||
833 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
834 | parent); | |
835 | *usage_bytes = usage->buffer_use; | |
836 | end: | |
837 | return status; | |
838 | } |