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a58c490f | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
a58c490f | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: LGPL-2.1-only |
a58c490f | 5 | * |
a58c490f JG |
6 | */ |
7 | ||
8 | #include <lttng/condition/condition-internal.h> | |
9 | #include <lttng/condition/buffer-usage-internal.h> | |
10 | #include <common/macros.h> | |
11 | #include <common/error.h> | |
12 | #include <assert.h> | |
13 | #include <math.h> | |
14 | #include <float.h> | |
15 | #include <time.h> | |
16 | ||
17 | #define IS_USAGE_CONDITION(condition) ( \ | |
18 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || \ | |
19 | lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH \ | |
20 | ) | |
21 | ||
22 | static | |
23 | double fixed_to_double(uint32_t val) | |
24 | { | |
25 | return (double) val / (double) UINT32_MAX; | |
26 | } | |
27 | ||
28 | static | |
29 | uint64_t double_to_fixed(double val) | |
30 | { | |
31 | return (val * (double) UINT32_MAX); | |
32 | } | |
33 | ||
34 | static | |
35 | bool is_usage_evaluation(const struct lttng_evaluation *evaluation) | |
36 | { | |
37 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); | |
38 | ||
39 | return type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || | |
40 | type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH; | |
41 | } | |
42 | ||
43 | static | |
44 | void lttng_condition_buffer_usage_destroy(struct lttng_condition *condition) | |
45 | { | |
46 | struct lttng_condition_buffer_usage *usage; | |
47 | ||
48 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
49 | parent); | |
50 | ||
51 | free(usage->session_name); | |
52 | free(usage->channel_name); | |
53 | free(usage); | |
54 | } | |
55 | ||
56 | static | |
57 | bool lttng_condition_buffer_usage_validate( | |
58 | const struct lttng_condition *condition) | |
59 | { | |
60 | bool valid = false; | |
61 | struct lttng_condition_buffer_usage *usage; | |
62 | ||
63 | if (!condition) { | |
64 | goto end; | |
65 | } | |
66 | ||
67 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
68 | parent); | |
69 | if (!usage->session_name) { | |
70 | ERR("Invalid buffer condition: a target session name must be set."); | |
71 | goto end; | |
72 | } | |
73 | if (!usage->channel_name) { | |
74 | ERR("Invalid buffer condition: a target channel name must be set."); | |
75 | goto end; | |
76 | } | |
77 | if (!usage->threshold_ratio.set && !usage->threshold_bytes.set) { | |
78 | ERR("Invalid buffer condition: a threshold must be set."); | |
79 | goto end; | |
80 | } | |
821d5e92 JG |
81 | if (!usage->domain.set) { |
82 | ERR("Invalid buffer usage condition: a domain must be set."); | |
83 | goto end; | |
84 | } | |
a58c490f JG |
85 | |
86 | valid = true; | |
87 | end: | |
88 | return valid; | |
89 | } | |
90 | ||
91 | static | |
3647288f JG |
92 | int lttng_condition_buffer_usage_serialize( |
93 | const struct lttng_condition *condition, | |
c0a66c84 | 94 | struct lttng_payload *payload) |
a58c490f | 95 | { |
3647288f | 96 | int ret; |
a58c490f | 97 | struct lttng_condition_buffer_usage *usage; |
a58c490f | 98 | size_t session_name_len, channel_name_len; |
3647288f | 99 | struct lttng_condition_buffer_usage_comm usage_comm; |
a58c490f JG |
100 | |
101 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
102 | ret = -1; | |
103 | goto end; | |
104 | } | |
105 | ||
106 | DBG("Serializing buffer usage condition"); | |
107 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
108 | parent); | |
3647288f | 109 | |
a58c490f JG |
110 | session_name_len = strlen(usage->session_name) + 1; |
111 | channel_name_len = strlen(usage->channel_name) + 1; | |
112 | if (session_name_len > LTTNG_NAME_MAX || | |
113 | channel_name_len > LTTNG_NAME_MAX) { | |
114 | ret = -1; | |
115 | goto end; | |
116 | } | |
3647288f JG |
117 | |
118 | usage_comm.threshold_set_in_bytes = !!usage->threshold_bytes.set; | |
119 | usage_comm.session_name_len = session_name_len; | |
120 | usage_comm.channel_name_len = channel_name_len; | |
121 | usage_comm.domain_type = (int8_t) usage->domain.type; | |
122 | ||
123 | if (usage->threshold_bytes.set) { | |
124 | usage_comm.threshold = usage->threshold_bytes.value; | |
125 | } else { | |
126 | uint64_t val = double_to_fixed( | |
127 | usage->threshold_ratio.value); | |
128 | ||
129 | if (val > UINT32_MAX) { | |
130 | /* overflow. */ | |
131 | ret = -1; | |
132 | goto end; | |
a58c490f | 133 | } |
3647288f JG |
134 | usage_comm.threshold = val; |
135 | } | |
a58c490f | 136 | |
c0a66c84 | 137 | ret = lttng_dynamic_buffer_append(&payload->buffer, &usage_comm, |
3647288f JG |
138 | sizeof(usage_comm)); |
139 | if (ret) { | |
140 | goto end; | |
141 | } | |
c0a66c84 JG |
142 | |
143 | ret = lttng_dynamic_buffer_append(&payload->buffer, usage->session_name, | |
3647288f JG |
144 | session_name_len); |
145 | if (ret) { | |
146 | goto end; | |
147 | } | |
c0a66c84 JG |
148 | |
149 | ret = lttng_dynamic_buffer_append(&payload->buffer, usage->channel_name, | |
3647288f JG |
150 | channel_name_len); |
151 | if (ret) { | |
152 | goto end; | |
a58c490f | 153 | } |
a58c490f JG |
154 | end: |
155 | return ret; | |
156 | } | |
157 | ||
158 | static | |
159 | bool lttng_condition_buffer_usage_is_equal(const struct lttng_condition *_a, | |
160 | const struct lttng_condition *_b) | |
161 | { | |
162 | bool is_equal = false; | |
163 | struct lttng_condition_buffer_usage *a, *b; | |
164 | ||
165 | a = container_of(_a, struct lttng_condition_buffer_usage, parent); | |
166 | b = container_of(_b, struct lttng_condition_buffer_usage, parent); | |
167 | ||
168 | if ((a->threshold_ratio.set && !b->threshold_ratio.set) || | |
169 | (a->threshold_bytes.set && !b->threshold_bytes.set)) { | |
170 | goto end; | |
171 | } | |
172 | ||
173 | if (a->threshold_ratio.set && b->threshold_ratio.set) { | |
174 | double a_value, b_value, diff; | |
175 | ||
176 | a_value = a->threshold_ratio.value; | |
177 | b_value = b->threshold_ratio.value; | |
178 | diff = fabs(a_value - b_value); | |
179 | ||
180 | if (diff > DBL_EPSILON) { | |
181 | goto end; | |
182 | } | |
183 | } else if (a->threshold_bytes.set && b->threshold_bytes.set) { | |
184 | uint64_t a_value, b_value; | |
185 | ||
186 | a_value = a->threshold_bytes.value; | |
187 | b_value = b->threshold_bytes.value; | |
188 | if (a_value != b_value) { | |
189 | goto end; | |
190 | } | |
191 | } | |
192 | ||
821d5e92 JG |
193 | /* Condition is not valid if this is not true. */ |
194 | assert(a->session_name); | |
195 | assert(b->session_name); | |
196 | if (strcmp(a->session_name, b->session_name)) { | |
a58c490f JG |
197 | goto end; |
198 | } | |
199 | ||
821d5e92 JG |
200 | assert(a->channel_name); |
201 | assert(b->channel_name); | |
202 | if (strcmp(a->channel_name, b->channel_name)) { | |
a58c490f JG |
203 | goto end; |
204 | } | |
205 | ||
821d5e92 JG |
206 | assert(a->domain.set); |
207 | assert(b->domain.set); | |
208 | if (a->domain.type != b->domain.type) { | |
a58c490f JG |
209 | goto end; |
210 | } | |
a58c490f JG |
211 | is_equal = true; |
212 | end: | |
213 | return is_equal; | |
214 | } | |
215 | ||
216 | static | |
217 | struct lttng_condition *lttng_condition_buffer_usage_create( | |
218 | enum lttng_condition_type type) | |
219 | { | |
220 | struct lttng_condition_buffer_usage *condition; | |
221 | ||
222 | condition = zmalloc(sizeof(struct lttng_condition_buffer_usage)); | |
223 | if (!condition) { | |
9a09eef5 | 224 | return NULL; |
a58c490f JG |
225 | } |
226 | ||
227 | lttng_condition_init(&condition->parent, type); | |
228 | condition->parent.validate = lttng_condition_buffer_usage_validate; | |
229 | condition->parent.serialize = lttng_condition_buffer_usage_serialize; | |
230 | condition->parent.equal = lttng_condition_buffer_usage_is_equal; | |
231 | condition->parent.destroy = lttng_condition_buffer_usage_destroy; | |
a58c490f JG |
232 | return &condition->parent; |
233 | } | |
234 | ||
235 | struct lttng_condition *lttng_condition_buffer_usage_low_create(void) | |
236 | { | |
237 | return lttng_condition_buffer_usage_create( | |
238 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW); | |
239 | } | |
240 | ||
241 | struct lttng_condition *lttng_condition_buffer_usage_high_create(void) | |
242 | { | |
243 | return lttng_condition_buffer_usage_create( | |
244 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH); | |
245 | } | |
246 | ||
247 | static | |
c0a66c84 JG |
248 | ssize_t init_condition_from_payload(struct lttng_condition *condition, |
249 | struct lttng_payload_view *src_view) | |
a58c490f JG |
250 | { |
251 | ssize_t ret, condition_size; | |
252 | enum lttng_condition_status status; | |
253 | enum lttng_domain_type domain_type; | |
254 | const struct lttng_condition_buffer_usage_comm *condition_comm; | |
255 | const char *session_name, *channel_name; | |
256 | struct lttng_buffer_view names_view; | |
257 | ||
c0a66c84 | 258 | if (src_view->buffer.size < sizeof(*condition_comm)) { |
a58c490f JG |
259 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); |
260 | ret = -1; | |
261 | goto end; | |
262 | } | |
263 | ||
c0a66c84 JG |
264 | condition_comm = (typeof(condition_comm)) src_view->buffer.data; |
265 | names_view = lttng_buffer_view_from_view(&src_view->buffer, | |
a58c490f JG |
266 | sizeof(*condition_comm), -1); |
267 | ||
268 | if (condition_comm->session_name_len > LTTNG_NAME_MAX || | |
269 | condition_comm->channel_name_len > LTTNG_NAME_MAX) { | |
270 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); | |
271 | ret = -1; | |
272 | goto end; | |
273 | } | |
274 | ||
275 | if (names_view.size < | |
276 | (condition_comm->session_name_len + | |
277 | condition_comm->channel_name_len)) { | |
278 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); | |
279 | ret = -1; | |
280 | goto end; | |
281 | } | |
282 | ||
283 | if (condition_comm->threshold_set_in_bytes) { | |
284 | status = lttng_condition_buffer_usage_set_threshold(condition, | |
285 | condition_comm->threshold); | |
286 | } else { | |
287 | status = lttng_condition_buffer_usage_set_threshold_ratio( | |
288 | condition, | |
289 | fixed_to_double(condition_comm->threshold)); | |
290 | } | |
c0a66c84 | 291 | |
a58c490f JG |
292 | if (status != LTTNG_CONDITION_STATUS_OK) { |
293 | ERR("Failed to initialize buffer usage condition threshold"); | |
294 | ret = -1; | |
295 | goto end; | |
296 | } | |
297 | ||
298 | if (condition_comm->domain_type <= LTTNG_DOMAIN_NONE || | |
299 | condition_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
300 | /* Invalid domain value. */ | |
301 | ERR("Invalid domain type value (%i) found in condition buffer", | |
302 | (int) condition_comm->domain_type); | |
303 | ret = -1; | |
304 | goto end; | |
305 | } | |
306 | ||
307 | domain_type = (enum lttng_domain_type) condition_comm->domain_type; | |
308 | status = lttng_condition_buffer_usage_set_domain_type(condition, | |
309 | domain_type); | |
310 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
311 | ERR("Failed to set buffer usage condition domain"); | |
312 | ret = -1; | |
313 | goto end; | |
314 | } | |
315 | ||
316 | session_name = names_view.data; | |
317 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { | |
318 | ERR("Malformed session name encountered in condition buffer"); | |
319 | ret = -1; | |
320 | goto end; | |
321 | } | |
322 | ||
323 | channel_name = session_name + condition_comm->session_name_len; | |
324 | if (*(channel_name + condition_comm->channel_name_len - 1) != '\0') { | |
325 | ERR("Malformed channel name encountered in condition buffer"); | |
326 | ret = -1; | |
327 | goto end; | |
328 | } | |
329 | ||
330 | status = lttng_condition_buffer_usage_set_session_name(condition, | |
331 | session_name); | |
332 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
333 | ERR("Failed to set buffer usage session name"); | |
334 | ret = -1; | |
335 | goto end; | |
336 | } | |
337 | ||
338 | status = lttng_condition_buffer_usage_set_channel_name(condition, | |
339 | channel_name); | |
340 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
341 | ERR("Failed to set buffer usage channel name"); | |
342 | ret = -1; | |
343 | goto end; | |
344 | } | |
345 | ||
346 | if (!lttng_condition_validate(condition)) { | |
347 | ret = -1; | |
348 | goto end; | |
349 | } | |
350 | ||
351 | condition_size = sizeof(*condition_comm) + | |
352 | (ssize_t) condition_comm->session_name_len + | |
353 | (ssize_t) condition_comm->channel_name_len; | |
354 | ret = condition_size; | |
355 | end: | |
356 | return ret; | |
357 | } | |
358 | ||
359 | LTTNG_HIDDEN | |
c0a66c84 JG |
360 | ssize_t lttng_condition_buffer_usage_low_create_from_payload( |
361 | struct lttng_payload_view *view, | |
a58c490f JG |
362 | struct lttng_condition **_condition) |
363 | { | |
364 | ssize_t ret; | |
365 | struct lttng_condition *condition = | |
366 | lttng_condition_buffer_usage_low_create(); | |
367 | ||
368 | if (!_condition || !condition) { | |
369 | ret = -1; | |
370 | goto error; | |
371 | } | |
372 | ||
c0a66c84 | 373 | ret = init_condition_from_payload(condition, view); |
a58c490f JG |
374 | if (ret < 0) { |
375 | goto error; | |
376 | } | |
377 | ||
378 | *_condition = condition; | |
379 | return ret; | |
380 | error: | |
381 | lttng_condition_destroy(condition); | |
382 | return ret; | |
383 | } | |
384 | ||
385 | LTTNG_HIDDEN | |
c0a66c84 JG |
386 | ssize_t lttng_condition_buffer_usage_high_create_from_payload( |
387 | struct lttng_payload_view *view, | |
a58c490f JG |
388 | struct lttng_condition **_condition) |
389 | { | |
390 | ssize_t ret; | |
391 | struct lttng_condition *condition = | |
392 | lttng_condition_buffer_usage_high_create(); | |
393 | ||
394 | if (!_condition || !condition) { | |
395 | ret = -1; | |
396 | goto error; | |
397 | } | |
398 | ||
c0a66c84 | 399 | ret = init_condition_from_payload(condition, view); |
a58c490f JG |
400 | if (ret < 0) { |
401 | goto error; | |
402 | } | |
403 | ||
404 | *_condition = condition; | |
405 | return ret; | |
406 | error: | |
407 | lttng_condition_destroy(condition); | |
408 | return ret; | |
409 | } | |
410 | ||
411 | static | |
c0a66c84 | 412 | struct lttng_evaluation *create_evaluation_from_payload( |
a58c490f | 413 | enum lttng_condition_type type, |
c0a66c84 | 414 | struct lttng_payload_view *view) |
a58c490f JG |
415 | { |
416 | const struct lttng_evaluation_buffer_usage_comm *comm = | |
c0a66c84 | 417 | (typeof(comm)) view->buffer.data; |
a58c490f JG |
418 | struct lttng_evaluation *evaluation = NULL; |
419 | ||
c0a66c84 | 420 | if (view->buffer.size < sizeof(*comm)) { |
a58c490f JG |
421 | goto end; |
422 | } | |
423 | ||
424 | evaluation = lttng_evaluation_buffer_usage_create(type, | |
425 | comm->buffer_use, comm->buffer_capacity); | |
426 | end: | |
427 | return evaluation; | |
428 | } | |
429 | ||
430 | LTTNG_HIDDEN | |
c0a66c84 JG |
431 | ssize_t lttng_evaluation_buffer_usage_low_create_from_payload( |
432 | struct lttng_payload_view *view, | |
a58c490f JG |
433 | struct lttng_evaluation **_evaluation) |
434 | { | |
435 | ssize_t ret; | |
436 | struct lttng_evaluation *evaluation = NULL; | |
437 | ||
438 | if (!_evaluation) { | |
439 | ret = -1; | |
440 | goto error; | |
441 | } | |
442 | ||
c0a66c84 | 443 | evaluation = create_evaluation_from_payload( |
a58c490f JG |
444 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW, view); |
445 | if (!evaluation) { | |
446 | ret = -1; | |
447 | goto error; | |
448 | } | |
449 | ||
450 | *_evaluation = evaluation; | |
451 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
452 | return ret; | |
453 | error: | |
454 | lttng_evaluation_destroy(evaluation); | |
455 | return ret; | |
456 | } | |
457 | ||
458 | LTTNG_HIDDEN | |
c0a66c84 JG |
459 | ssize_t lttng_evaluation_buffer_usage_high_create_from_payload( |
460 | struct lttng_payload_view *view, | |
a58c490f JG |
461 | struct lttng_evaluation **_evaluation) |
462 | { | |
463 | ssize_t ret; | |
464 | struct lttng_evaluation *evaluation = NULL; | |
465 | ||
466 | if (!_evaluation) { | |
467 | ret = -1; | |
468 | goto error; | |
469 | } | |
470 | ||
c0a66c84 | 471 | evaluation = create_evaluation_from_payload( |
a58c490f JG |
472 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH, view); |
473 | if (!evaluation) { | |
474 | ret = -1; | |
475 | goto error; | |
476 | } | |
477 | ||
478 | *_evaluation = evaluation; | |
479 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
480 | return ret; | |
481 | error: | |
482 | lttng_evaluation_destroy(evaluation); | |
483 | return ret; | |
484 | } | |
485 | ||
486 | enum lttng_condition_status | |
487 | lttng_condition_buffer_usage_get_threshold_ratio( | |
488 | const struct lttng_condition *condition, | |
489 | double *threshold_ratio) | |
490 | { | |
491 | struct lttng_condition_buffer_usage *usage; | |
492 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
493 | ||
494 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
495 | !threshold_ratio) { | |
496 | status = LTTNG_CONDITION_STATUS_INVALID; | |
497 | goto end; | |
498 | } | |
499 | ||
500 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
501 | parent); | |
502 | if (!usage->threshold_ratio.set) { | |
503 | status = LTTNG_CONDITION_STATUS_UNSET; | |
504 | goto end; | |
505 | } | |
506 | *threshold_ratio = usage->threshold_ratio.value; | |
507 | end: | |
508 | return status; | |
509 | } | |
510 | ||
511 | /* threshold_ratio expressed as [0.0, 1.0]. */ | |
512 | enum lttng_condition_status | |
513 | lttng_condition_buffer_usage_set_threshold_ratio( | |
514 | struct lttng_condition *condition, double threshold_ratio) | |
515 | { | |
516 | struct lttng_condition_buffer_usage *usage; | |
517 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
518 | ||
519 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
520 | threshold_ratio < 0.0 || | |
521 | threshold_ratio > 1.0) { | |
522 | status = LTTNG_CONDITION_STATUS_INVALID; | |
523 | goto end; | |
524 | } | |
525 | ||
526 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
527 | parent); | |
528 | usage->threshold_ratio.set = true; | |
529 | usage->threshold_bytes.set = false; | |
530 | usage->threshold_ratio.value = threshold_ratio; | |
531 | end: | |
532 | return status; | |
533 | } | |
534 | ||
535 | enum lttng_condition_status | |
536 | lttng_condition_buffer_usage_get_threshold( | |
537 | const struct lttng_condition *condition, | |
538 | uint64_t *threshold_bytes) | |
539 | { | |
540 | struct lttng_condition_buffer_usage *usage; | |
541 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
542 | ||
543 | if (!condition || !IS_USAGE_CONDITION(condition) || !threshold_bytes) { | |
544 | status = LTTNG_CONDITION_STATUS_INVALID; | |
545 | goto end; | |
546 | } | |
547 | ||
548 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
549 | parent); | |
550 | if (!usage->threshold_bytes.set) { | |
551 | status = LTTNG_CONDITION_STATUS_UNSET; | |
552 | goto end; | |
553 | } | |
554 | *threshold_bytes = usage->threshold_bytes.value; | |
555 | end: | |
556 | return status; | |
557 | } | |
558 | ||
559 | enum lttng_condition_status | |
560 | lttng_condition_buffer_usage_set_threshold( | |
561 | struct lttng_condition *condition, uint64_t threshold_bytes) | |
562 | { | |
563 | struct lttng_condition_buffer_usage *usage; | |
564 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
565 | ||
566 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
567 | status = LTTNG_CONDITION_STATUS_INVALID; | |
568 | goto end; | |
569 | } | |
570 | ||
571 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
572 | parent); | |
573 | usage->threshold_ratio.set = false; | |
574 | usage->threshold_bytes.set = true; | |
575 | usage->threshold_bytes.value = threshold_bytes; | |
576 | end: | |
577 | return status; | |
578 | } | |
579 | ||
580 | enum lttng_condition_status | |
581 | lttng_condition_buffer_usage_get_session_name( | |
582 | const struct lttng_condition *condition, | |
583 | const char **session_name) | |
584 | { | |
585 | struct lttng_condition_buffer_usage *usage; | |
586 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
587 | ||
588 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name) { | |
589 | status = LTTNG_CONDITION_STATUS_INVALID; | |
590 | goto end; | |
591 | } | |
592 | ||
593 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
594 | parent); | |
595 | if (!usage->session_name) { | |
596 | status = LTTNG_CONDITION_STATUS_UNSET; | |
597 | goto end; | |
598 | } | |
599 | *session_name = usage->session_name; | |
600 | end: | |
601 | return status; | |
602 | } | |
603 | ||
604 | enum lttng_condition_status | |
605 | lttng_condition_buffer_usage_set_session_name( | |
606 | struct lttng_condition *condition, const char *session_name) | |
607 | { | |
608 | char *session_name_copy; | |
609 | struct lttng_condition_buffer_usage *usage; | |
610 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
611 | ||
612 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name || | |
613 | strlen(session_name) == 0) { | |
614 | status = LTTNG_CONDITION_STATUS_INVALID; | |
615 | goto end; | |
616 | } | |
617 | ||
618 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
619 | parent); | |
620 | session_name_copy = strdup(session_name); | |
621 | if (!session_name_copy) { | |
622 | status = LTTNG_CONDITION_STATUS_ERROR; | |
623 | goto end; | |
624 | } | |
625 | ||
626 | if (usage->session_name) { | |
627 | free(usage->session_name); | |
628 | } | |
629 | usage->session_name = session_name_copy; | |
630 | end: | |
631 | return status; | |
632 | } | |
633 | ||
634 | enum lttng_condition_status | |
635 | lttng_condition_buffer_usage_get_channel_name( | |
636 | const struct lttng_condition *condition, | |
637 | const char **channel_name) | |
638 | { | |
639 | struct lttng_condition_buffer_usage *usage; | |
640 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
641 | ||
642 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name) { | |
643 | status = LTTNG_CONDITION_STATUS_INVALID; | |
644 | goto end; | |
645 | } | |
646 | ||
647 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
648 | parent); | |
649 | if (!usage->channel_name) { | |
650 | status = LTTNG_CONDITION_STATUS_UNSET; | |
651 | goto end; | |
652 | } | |
653 | *channel_name = usage->channel_name; | |
654 | end: | |
655 | return status; | |
656 | } | |
657 | ||
658 | enum lttng_condition_status | |
659 | lttng_condition_buffer_usage_set_channel_name( | |
660 | struct lttng_condition *condition, const char *channel_name) | |
661 | { | |
662 | char *channel_name_copy; | |
663 | struct lttng_condition_buffer_usage *usage; | |
664 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
665 | ||
666 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name || | |
667 | strlen(channel_name) == 0) { | |
668 | status = LTTNG_CONDITION_STATUS_INVALID; | |
669 | goto end; | |
670 | } | |
671 | ||
672 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
673 | parent); | |
674 | channel_name_copy = strdup(channel_name); | |
675 | if (!channel_name_copy) { | |
676 | status = LTTNG_CONDITION_STATUS_ERROR; | |
677 | goto end; | |
678 | } | |
679 | ||
680 | if (usage->channel_name) { | |
681 | free(usage->channel_name); | |
682 | } | |
683 | usage->channel_name = channel_name_copy; | |
684 | end: | |
685 | return status; | |
686 | } | |
687 | ||
688 | enum lttng_condition_status | |
689 | lttng_condition_buffer_usage_get_domain_type( | |
690 | const struct lttng_condition *condition, | |
691 | enum lttng_domain_type *type) | |
692 | { | |
693 | struct lttng_condition_buffer_usage *usage; | |
694 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
695 | ||
696 | if (!condition || !IS_USAGE_CONDITION(condition) || !type) { | |
697 | status = LTTNG_CONDITION_STATUS_INVALID; | |
698 | goto end; | |
699 | } | |
700 | ||
701 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
702 | parent); | |
703 | if (!usage->domain.set) { | |
704 | status = LTTNG_CONDITION_STATUS_UNSET; | |
705 | goto end; | |
706 | } | |
707 | *type = usage->domain.type; | |
708 | end: | |
709 | return status; | |
710 | } | |
711 | ||
712 | enum lttng_condition_status | |
713 | lttng_condition_buffer_usage_set_domain_type( | |
714 | struct lttng_condition *condition, enum lttng_domain_type type) | |
715 | { | |
716 | struct lttng_condition_buffer_usage *usage; | |
717 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
718 | ||
719 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
720 | type == LTTNG_DOMAIN_NONE) { | |
721 | status = LTTNG_CONDITION_STATUS_INVALID; | |
722 | goto end; | |
723 | } | |
724 | ||
725 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
726 | parent); | |
727 | usage->domain.set = true; | |
728 | usage->domain.type = type; | |
729 | end: | |
730 | return status; | |
731 | } | |
732 | ||
733 | static | |
3647288f | 734 | int lttng_evaluation_buffer_usage_serialize( |
9b63a4aa | 735 | const struct lttng_evaluation *evaluation, |
c0a66c84 | 736 | struct lttng_payload *payload) |
a58c490f | 737 | { |
a58c490f | 738 | struct lttng_evaluation_buffer_usage *usage; |
3647288f | 739 | struct lttng_evaluation_buffer_usage_comm comm; |
a58c490f JG |
740 | |
741 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
742 | parent); | |
3647288f JG |
743 | comm.buffer_use = usage->buffer_use; |
744 | comm.buffer_capacity = usage->buffer_capacity; | |
a58c490f | 745 | |
c0a66c84 JG |
746 | return lttng_dynamic_buffer_append( |
747 | &payload->buffer, &comm, sizeof(comm)); | |
a58c490f JG |
748 | } |
749 | ||
750 | static | |
751 | void lttng_evaluation_buffer_usage_destroy( | |
752 | struct lttng_evaluation *evaluation) | |
753 | { | |
754 | struct lttng_evaluation_buffer_usage *usage; | |
755 | ||
756 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
757 | parent); | |
758 | free(usage); | |
759 | } | |
760 | ||
761 | LTTNG_HIDDEN | |
762 | struct lttng_evaluation *lttng_evaluation_buffer_usage_create( | |
763 | enum lttng_condition_type type, uint64_t use, uint64_t capacity) | |
764 | { | |
765 | struct lttng_evaluation_buffer_usage *usage; | |
766 | ||
767 | usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage)); | |
768 | if (!usage) { | |
769 | goto end; | |
770 | } | |
771 | ||
772 | usage->parent.type = type; | |
773 | usage->buffer_use = use; | |
774 | usage->buffer_capacity = capacity; | |
775 | usage->parent.serialize = lttng_evaluation_buffer_usage_serialize; | |
776 | usage->parent.destroy = lttng_evaluation_buffer_usage_destroy; | |
777 | end: | |
778 | return &usage->parent; | |
779 | } | |
780 | ||
781 | /* | |
782 | * Get the sampled buffer usage which caused the associated condition to | |
783 | * evaluate to "true". | |
784 | */ | |
785 | enum lttng_evaluation_status | |
786 | lttng_evaluation_buffer_usage_get_usage_ratio( | |
787 | const struct lttng_evaluation *evaluation, double *usage_ratio) | |
788 | { | |
789 | struct lttng_evaluation_buffer_usage *usage; | |
790 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
791 | ||
792 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_ratio) { | |
793 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
794 | goto end; | |
795 | } | |
796 | ||
797 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
798 | parent); | |
799 | *usage_ratio = (double) usage->buffer_use / | |
800 | (double) usage->buffer_capacity; | |
801 | end: | |
802 | return status; | |
803 | } | |
804 | ||
805 | enum lttng_evaluation_status | |
806 | lttng_evaluation_buffer_usage_get_usage( | |
807 | const struct lttng_evaluation *evaluation, | |
808 | uint64_t *usage_bytes) | |
809 | { | |
810 | struct lttng_evaluation_buffer_usage *usage; | |
811 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
812 | ||
813 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) { | |
814 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
815 | goto end; | |
816 | } | |
817 | ||
818 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
819 | parent); | |
820 | *usage_bytes = usage->buffer_use; | |
821 | end: | |
822 | return status; | |
823 | } |