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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 | ||
a58c490f JG |
22 | static |
23 | bool is_usage_evaluation(const struct lttng_evaluation *evaluation) | |
24 | { | |
25 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); | |
26 | ||
27 | return type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW || | |
28 | type == LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH; | |
29 | } | |
30 | ||
31 | static | |
32 | void lttng_condition_buffer_usage_destroy(struct lttng_condition *condition) | |
33 | { | |
34 | struct lttng_condition_buffer_usage *usage; | |
35 | ||
36 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
37 | parent); | |
38 | ||
39 | free(usage->session_name); | |
40 | free(usage->channel_name); | |
41 | free(usage); | |
42 | } | |
43 | ||
44 | static | |
45 | bool lttng_condition_buffer_usage_validate( | |
46 | const struct lttng_condition *condition) | |
47 | { | |
48 | bool valid = false; | |
49 | struct lttng_condition_buffer_usage *usage; | |
50 | ||
51 | if (!condition) { | |
52 | goto end; | |
53 | } | |
54 | ||
55 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
56 | parent); | |
57 | if (!usage->session_name) { | |
58 | ERR("Invalid buffer condition: a target session name must be set."); | |
59 | goto end; | |
60 | } | |
61 | if (!usage->channel_name) { | |
62 | ERR("Invalid buffer condition: a target channel name must be set."); | |
63 | goto end; | |
64 | } | |
0879b5fe JR |
65 | if (usage->threshold_ratio.set == usage->threshold_bytes.set) { |
66 | ERR("Invalid buffer condition: a threshold must be set or both type cannot be used simultaneously."); | |
a58c490f JG |
67 | goto end; |
68 | } | |
821d5e92 JG |
69 | if (!usage->domain.set) { |
70 | ERR("Invalid buffer usage condition: a domain must be set."); | |
71 | goto end; | |
72 | } | |
a58c490f JG |
73 | |
74 | valid = true; | |
75 | end: | |
76 | return valid; | |
77 | } | |
78 | ||
79 | static | |
3647288f JG |
80 | int lttng_condition_buffer_usage_serialize( |
81 | const struct lttng_condition *condition, | |
c0a66c84 | 82 | struct lttng_payload *payload) |
a58c490f | 83 | { |
3647288f | 84 | int ret; |
a58c490f | 85 | struct lttng_condition_buffer_usage *usage; |
a58c490f | 86 | size_t session_name_len, channel_name_len; |
aae40bf5 | 87 | struct lttng_condition_buffer_usage_comm usage_comm = {}; |
a58c490f JG |
88 | |
89 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
90 | ret = -1; | |
91 | goto end; | |
92 | } | |
93 | ||
94 | DBG("Serializing buffer usage condition"); | |
95 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
96 | parent); | |
3647288f | 97 | |
a58c490f JG |
98 | session_name_len = strlen(usage->session_name) + 1; |
99 | channel_name_len = strlen(usage->channel_name) + 1; | |
100 | if (session_name_len > LTTNG_NAME_MAX || | |
101 | channel_name_len > LTTNG_NAME_MAX) { | |
102 | ret = -1; | |
103 | goto end; | |
104 | } | |
3647288f JG |
105 | |
106 | usage_comm.threshold_set_in_bytes = !!usage->threshold_bytes.set; | |
107 | usage_comm.session_name_len = session_name_len; | |
108 | usage_comm.channel_name_len = channel_name_len; | |
109 | usage_comm.domain_type = (int8_t) usage->domain.type; | |
110 | ||
111 | if (usage->threshold_bytes.set) { | |
ab2898b4 | 112 | usage_comm.threshold_bytes = usage->threshold_bytes.value; |
3647288f | 113 | } else { |
ab2898b4 | 114 | usage_comm.threshold_ratio = usage->threshold_ratio.value; |
3647288f | 115 | } |
a58c490f | 116 | |
c0a66c84 | 117 | ret = lttng_dynamic_buffer_append(&payload->buffer, &usage_comm, |
3647288f JG |
118 | sizeof(usage_comm)); |
119 | if (ret) { | |
120 | goto end; | |
121 | } | |
c0a66c84 JG |
122 | |
123 | ret = lttng_dynamic_buffer_append(&payload->buffer, usage->session_name, | |
3647288f JG |
124 | session_name_len); |
125 | if (ret) { | |
126 | goto end; | |
127 | } | |
c0a66c84 JG |
128 | |
129 | ret = lttng_dynamic_buffer_append(&payload->buffer, usage->channel_name, | |
3647288f JG |
130 | channel_name_len); |
131 | if (ret) { | |
132 | goto end; | |
a58c490f | 133 | } |
a58c490f JG |
134 | end: |
135 | return ret; | |
136 | } | |
137 | ||
138 | static | |
139 | bool lttng_condition_buffer_usage_is_equal(const struct lttng_condition *_a, | |
140 | const struct lttng_condition *_b) | |
141 | { | |
142 | bool is_equal = false; | |
143 | struct lttng_condition_buffer_usage *a, *b; | |
144 | ||
145 | a = container_of(_a, struct lttng_condition_buffer_usage, parent); | |
146 | b = container_of(_b, struct lttng_condition_buffer_usage, parent); | |
147 | ||
148 | if ((a->threshold_ratio.set && !b->threshold_ratio.set) || | |
149 | (a->threshold_bytes.set && !b->threshold_bytes.set)) { | |
150 | goto end; | |
151 | } | |
152 | ||
153 | if (a->threshold_ratio.set && b->threshold_ratio.set) { | |
154 | double a_value, b_value, diff; | |
155 | ||
156 | a_value = a->threshold_ratio.value; | |
157 | b_value = b->threshold_ratio.value; | |
158 | diff = fabs(a_value - b_value); | |
159 | ||
160 | if (diff > DBL_EPSILON) { | |
161 | goto end; | |
162 | } | |
163 | } else if (a->threshold_bytes.set && b->threshold_bytes.set) { | |
164 | uint64_t a_value, b_value; | |
165 | ||
166 | a_value = a->threshold_bytes.value; | |
167 | b_value = b->threshold_bytes.value; | |
168 | if (a_value != b_value) { | |
169 | goto end; | |
170 | } | |
171 | } | |
172 | ||
821d5e92 JG |
173 | /* Condition is not valid if this is not true. */ |
174 | assert(a->session_name); | |
175 | assert(b->session_name); | |
176 | if (strcmp(a->session_name, b->session_name)) { | |
a58c490f JG |
177 | goto end; |
178 | } | |
179 | ||
821d5e92 JG |
180 | assert(a->channel_name); |
181 | assert(b->channel_name); | |
182 | if (strcmp(a->channel_name, b->channel_name)) { | |
a58c490f JG |
183 | goto end; |
184 | } | |
185 | ||
821d5e92 JG |
186 | assert(a->domain.set); |
187 | assert(b->domain.set); | |
188 | if (a->domain.type != b->domain.type) { | |
a58c490f JG |
189 | goto end; |
190 | } | |
a58c490f JG |
191 | is_equal = true; |
192 | end: | |
193 | return is_equal; | |
194 | } | |
195 | ||
196 | static | |
197 | struct lttng_condition *lttng_condition_buffer_usage_create( | |
198 | enum lttng_condition_type type) | |
199 | { | |
200 | struct lttng_condition_buffer_usage *condition; | |
201 | ||
202 | condition = zmalloc(sizeof(struct lttng_condition_buffer_usage)); | |
203 | if (!condition) { | |
9a09eef5 | 204 | return NULL; |
a58c490f JG |
205 | } |
206 | ||
207 | lttng_condition_init(&condition->parent, type); | |
208 | condition->parent.validate = lttng_condition_buffer_usage_validate; | |
209 | condition->parent.serialize = lttng_condition_buffer_usage_serialize; | |
210 | condition->parent.equal = lttng_condition_buffer_usage_is_equal; | |
211 | condition->parent.destroy = lttng_condition_buffer_usage_destroy; | |
a58c490f JG |
212 | return &condition->parent; |
213 | } | |
214 | ||
215 | struct lttng_condition *lttng_condition_buffer_usage_low_create(void) | |
216 | { | |
217 | return lttng_condition_buffer_usage_create( | |
218 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW); | |
219 | } | |
220 | ||
221 | struct lttng_condition *lttng_condition_buffer_usage_high_create(void) | |
222 | { | |
223 | return lttng_condition_buffer_usage_create( | |
224 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH); | |
225 | } | |
226 | ||
227 | static | |
c0a66c84 JG |
228 | ssize_t init_condition_from_payload(struct lttng_condition *condition, |
229 | struct lttng_payload_view *src_view) | |
a58c490f JG |
230 | { |
231 | ssize_t ret, condition_size; | |
232 | enum lttng_condition_status status; | |
233 | enum lttng_domain_type domain_type; | |
a58c490f JG |
234 | const char *session_name, *channel_name; |
235 | struct lttng_buffer_view names_view; | |
3e6e0df2 JG |
236 | const struct lttng_condition_buffer_usage_comm *condition_comm; |
237 | const struct lttng_payload_view condition_comm_view = | |
238 | lttng_payload_view_from_view( | |
239 | src_view, 0, sizeof(*condition_comm)); | |
a58c490f | 240 | |
3e6e0df2 | 241 | if (!lttng_payload_view_is_valid(&condition_comm_view)) { |
a58c490f JG |
242 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); |
243 | ret = -1; | |
244 | goto end; | |
245 | } | |
246 | ||
3e6e0df2 | 247 | condition_comm = (typeof(condition_comm)) condition_comm_view.buffer.data; |
c0a66c84 | 248 | names_view = lttng_buffer_view_from_view(&src_view->buffer, |
a58c490f JG |
249 | sizeof(*condition_comm), -1); |
250 | ||
251 | if (condition_comm->session_name_len > LTTNG_NAME_MAX || | |
252 | condition_comm->channel_name_len > LTTNG_NAME_MAX) { | |
253 | ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); | |
254 | ret = -1; | |
255 | goto end; | |
256 | } | |
257 | ||
258 | if (names_view.size < | |
259 | (condition_comm->session_name_len + | |
260 | condition_comm->channel_name_len)) { | |
261 | ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); | |
262 | ret = -1; | |
263 | goto end; | |
264 | } | |
265 | ||
266 | if (condition_comm->threshold_set_in_bytes) { | |
267 | status = lttng_condition_buffer_usage_set_threshold(condition, | |
ab2898b4 | 268 | condition_comm->threshold_bytes); |
a58c490f JG |
269 | } else { |
270 | status = lttng_condition_buffer_usage_set_threshold_ratio( | |
ab2898b4 | 271 | condition, condition_comm->threshold_ratio); |
a58c490f | 272 | } |
c0a66c84 | 273 | |
a58c490f JG |
274 | if (status != LTTNG_CONDITION_STATUS_OK) { |
275 | ERR("Failed to initialize buffer usage condition threshold"); | |
276 | ret = -1; | |
277 | goto end; | |
278 | } | |
279 | ||
280 | if (condition_comm->domain_type <= LTTNG_DOMAIN_NONE || | |
281 | condition_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
282 | /* Invalid domain value. */ | |
283 | ERR("Invalid domain type value (%i) found in condition buffer", | |
284 | (int) condition_comm->domain_type); | |
285 | ret = -1; | |
286 | goto end; | |
287 | } | |
288 | ||
289 | domain_type = (enum lttng_domain_type) condition_comm->domain_type; | |
290 | status = lttng_condition_buffer_usage_set_domain_type(condition, | |
291 | domain_type); | |
292 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
293 | ERR("Failed to set buffer usage condition domain"); | |
294 | ret = -1; | |
295 | goto end; | |
296 | } | |
297 | ||
298 | session_name = names_view.data; | |
299 | if (*(session_name + condition_comm->session_name_len - 1) != '\0') { | |
300 | ERR("Malformed session name encountered in condition buffer"); | |
301 | ret = -1; | |
302 | goto end; | |
303 | } | |
304 | ||
305 | channel_name = session_name + condition_comm->session_name_len; | |
306 | if (*(channel_name + condition_comm->channel_name_len - 1) != '\0') { | |
307 | ERR("Malformed channel name encountered in condition buffer"); | |
308 | ret = -1; | |
309 | goto end; | |
310 | } | |
311 | ||
312 | status = lttng_condition_buffer_usage_set_session_name(condition, | |
313 | session_name); | |
314 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
315 | ERR("Failed to set buffer usage session name"); | |
316 | ret = -1; | |
317 | goto end; | |
318 | } | |
319 | ||
320 | status = lttng_condition_buffer_usage_set_channel_name(condition, | |
321 | channel_name); | |
322 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
323 | ERR("Failed to set buffer usage channel name"); | |
324 | ret = -1; | |
325 | goto end; | |
326 | } | |
327 | ||
328 | if (!lttng_condition_validate(condition)) { | |
329 | ret = -1; | |
330 | goto end; | |
331 | } | |
332 | ||
333 | condition_size = sizeof(*condition_comm) + | |
334 | (ssize_t) condition_comm->session_name_len + | |
335 | (ssize_t) condition_comm->channel_name_len; | |
336 | ret = condition_size; | |
337 | end: | |
338 | return ret; | |
339 | } | |
340 | ||
341 | LTTNG_HIDDEN | |
c0a66c84 JG |
342 | ssize_t lttng_condition_buffer_usage_low_create_from_payload( |
343 | struct lttng_payload_view *view, | |
a58c490f JG |
344 | struct lttng_condition **_condition) |
345 | { | |
346 | ssize_t ret; | |
347 | struct lttng_condition *condition = | |
348 | lttng_condition_buffer_usage_low_create(); | |
349 | ||
350 | if (!_condition || !condition) { | |
351 | ret = -1; | |
352 | goto error; | |
353 | } | |
354 | ||
c0a66c84 | 355 | ret = init_condition_from_payload(condition, view); |
a58c490f JG |
356 | if (ret < 0) { |
357 | goto error; | |
358 | } | |
359 | ||
360 | *_condition = condition; | |
361 | return ret; | |
362 | error: | |
363 | lttng_condition_destroy(condition); | |
364 | return ret; | |
365 | } | |
366 | ||
367 | LTTNG_HIDDEN | |
c0a66c84 JG |
368 | ssize_t lttng_condition_buffer_usage_high_create_from_payload( |
369 | struct lttng_payload_view *view, | |
a58c490f JG |
370 | struct lttng_condition **_condition) |
371 | { | |
372 | ssize_t ret; | |
373 | struct lttng_condition *condition = | |
374 | lttng_condition_buffer_usage_high_create(); | |
375 | ||
376 | if (!_condition || !condition) { | |
377 | ret = -1; | |
378 | goto error; | |
379 | } | |
380 | ||
c0a66c84 | 381 | ret = init_condition_from_payload(condition, view); |
a58c490f JG |
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 | static | |
c0a66c84 | 394 | struct lttng_evaluation *create_evaluation_from_payload( |
a58c490f | 395 | enum lttng_condition_type type, |
c0a66c84 | 396 | struct lttng_payload_view *view) |
a58c490f JG |
397 | { |
398 | const struct lttng_evaluation_buffer_usage_comm *comm = | |
c0a66c84 | 399 | (typeof(comm)) view->buffer.data; |
a58c490f JG |
400 | struct lttng_evaluation *evaluation = NULL; |
401 | ||
c0a66c84 | 402 | if (view->buffer.size < sizeof(*comm)) { |
a58c490f JG |
403 | goto end; |
404 | } | |
405 | ||
406 | evaluation = lttng_evaluation_buffer_usage_create(type, | |
407 | comm->buffer_use, comm->buffer_capacity); | |
408 | end: | |
409 | return evaluation; | |
410 | } | |
411 | ||
412 | LTTNG_HIDDEN | |
c0a66c84 JG |
413 | ssize_t lttng_evaluation_buffer_usage_low_create_from_payload( |
414 | struct lttng_payload_view *view, | |
a58c490f JG |
415 | struct lttng_evaluation **_evaluation) |
416 | { | |
417 | ssize_t ret; | |
418 | struct lttng_evaluation *evaluation = NULL; | |
419 | ||
420 | if (!_evaluation) { | |
421 | ret = -1; | |
422 | goto error; | |
423 | } | |
424 | ||
c0a66c84 | 425 | evaluation = create_evaluation_from_payload( |
a58c490f JG |
426 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW, view); |
427 | if (!evaluation) { | |
428 | ret = -1; | |
429 | goto error; | |
430 | } | |
431 | ||
432 | *_evaluation = evaluation; | |
433 | ret = sizeof(struct lttng_evaluation_buffer_usage_comm); | |
434 | return ret; | |
435 | error: | |
436 | lttng_evaluation_destroy(evaluation); | |
437 | return ret; | |
438 | } | |
439 | ||
440 | LTTNG_HIDDEN | |
c0a66c84 JG |
441 | ssize_t lttng_evaluation_buffer_usage_high_create_from_payload( |
442 | struct lttng_payload_view *view, | |
a58c490f JG |
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 | ||
c0a66c84 | 453 | evaluation = create_evaluation_from_payload( |
a58c490f JG |
454 | LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH, 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 | enum lttng_condition_status | |
469 | lttng_condition_buffer_usage_get_threshold_ratio( | |
470 | const struct lttng_condition *condition, | |
471 | double *threshold_ratio) | |
472 | { | |
473 | struct lttng_condition_buffer_usage *usage; | |
474 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
475 | ||
476 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
477 | !threshold_ratio) { | |
478 | status = LTTNG_CONDITION_STATUS_INVALID; | |
479 | goto end; | |
480 | } | |
481 | ||
482 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
483 | parent); | |
484 | if (!usage->threshold_ratio.set) { | |
485 | status = LTTNG_CONDITION_STATUS_UNSET; | |
486 | goto end; | |
487 | } | |
488 | *threshold_ratio = usage->threshold_ratio.value; | |
489 | end: | |
490 | return status; | |
491 | } | |
492 | ||
493 | /* threshold_ratio expressed as [0.0, 1.0]. */ | |
494 | enum lttng_condition_status | |
495 | lttng_condition_buffer_usage_set_threshold_ratio( | |
496 | struct lttng_condition *condition, double threshold_ratio) | |
497 | { | |
498 | struct lttng_condition_buffer_usage *usage; | |
499 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
500 | ||
501 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
502 | threshold_ratio < 0.0 || | |
503 | threshold_ratio > 1.0) { | |
504 | status = LTTNG_CONDITION_STATUS_INVALID; | |
505 | goto end; | |
506 | } | |
507 | ||
508 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
509 | parent); | |
510 | usage->threshold_ratio.set = true; | |
511 | usage->threshold_bytes.set = false; | |
512 | usage->threshold_ratio.value = threshold_ratio; | |
513 | end: | |
514 | return status; | |
515 | } | |
516 | ||
517 | enum lttng_condition_status | |
518 | lttng_condition_buffer_usage_get_threshold( | |
519 | const struct lttng_condition *condition, | |
520 | uint64_t *threshold_bytes) | |
521 | { | |
522 | struct lttng_condition_buffer_usage *usage; | |
523 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
524 | ||
525 | if (!condition || !IS_USAGE_CONDITION(condition) || !threshold_bytes) { | |
526 | status = LTTNG_CONDITION_STATUS_INVALID; | |
527 | goto end; | |
528 | } | |
529 | ||
530 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
531 | parent); | |
532 | if (!usage->threshold_bytes.set) { | |
533 | status = LTTNG_CONDITION_STATUS_UNSET; | |
534 | goto end; | |
535 | } | |
536 | *threshold_bytes = usage->threshold_bytes.value; | |
537 | end: | |
538 | return status; | |
539 | } | |
540 | ||
541 | enum lttng_condition_status | |
542 | lttng_condition_buffer_usage_set_threshold( | |
543 | struct lttng_condition *condition, uint64_t threshold_bytes) | |
544 | { | |
545 | struct lttng_condition_buffer_usage *usage; | |
546 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
547 | ||
548 | if (!condition || !IS_USAGE_CONDITION(condition)) { | |
549 | status = LTTNG_CONDITION_STATUS_INVALID; | |
550 | goto end; | |
551 | } | |
552 | ||
553 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
554 | parent); | |
555 | usage->threshold_ratio.set = false; | |
556 | usage->threshold_bytes.set = true; | |
557 | usage->threshold_bytes.value = threshold_bytes; | |
558 | end: | |
559 | return status; | |
560 | } | |
561 | ||
562 | enum lttng_condition_status | |
563 | lttng_condition_buffer_usage_get_session_name( | |
564 | const struct lttng_condition *condition, | |
565 | const char **session_name) | |
566 | { | |
567 | struct lttng_condition_buffer_usage *usage; | |
568 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
569 | ||
570 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name) { | |
571 | status = LTTNG_CONDITION_STATUS_INVALID; | |
572 | goto end; | |
573 | } | |
574 | ||
575 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
576 | parent); | |
577 | if (!usage->session_name) { | |
578 | status = LTTNG_CONDITION_STATUS_UNSET; | |
579 | goto end; | |
580 | } | |
581 | *session_name = usage->session_name; | |
582 | end: | |
583 | return status; | |
584 | } | |
585 | ||
586 | enum lttng_condition_status | |
587 | lttng_condition_buffer_usage_set_session_name( | |
588 | struct lttng_condition *condition, const char *session_name) | |
589 | { | |
590 | char *session_name_copy; | |
591 | struct lttng_condition_buffer_usage *usage; | |
592 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
593 | ||
594 | if (!condition || !IS_USAGE_CONDITION(condition) || !session_name || | |
595 | strlen(session_name) == 0) { | |
596 | status = LTTNG_CONDITION_STATUS_INVALID; | |
597 | goto end; | |
598 | } | |
599 | ||
600 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
601 | parent); | |
602 | session_name_copy = strdup(session_name); | |
603 | if (!session_name_copy) { | |
604 | status = LTTNG_CONDITION_STATUS_ERROR; | |
605 | goto end; | |
606 | } | |
607 | ||
608 | if (usage->session_name) { | |
609 | free(usage->session_name); | |
610 | } | |
611 | usage->session_name = session_name_copy; | |
612 | end: | |
613 | return status; | |
614 | } | |
615 | ||
616 | enum lttng_condition_status | |
617 | lttng_condition_buffer_usage_get_channel_name( | |
618 | const struct lttng_condition *condition, | |
619 | const char **channel_name) | |
620 | { | |
621 | struct lttng_condition_buffer_usage *usage; | |
622 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
623 | ||
624 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name) { | |
625 | status = LTTNG_CONDITION_STATUS_INVALID; | |
626 | goto end; | |
627 | } | |
628 | ||
629 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
630 | parent); | |
631 | if (!usage->channel_name) { | |
632 | status = LTTNG_CONDITION_STATUS_UNSET; | |
633 | goto end; | |
634 | } | |
635 | *channel_name = usage->channel_name; | |
636 | end: | |
637 | return status; | |
638 | } | |
639 | ||
640 | enum lttng_condition_status | |
641 | lttng_condition_buffer_usage_set_channel_name( | |
642 | struct lttng_condition *condition, const char *channel_name) | |
643 | { | |
644 | char *channel_name_copy; | |
645 | struct lttng_condition_buffer_usage *usage; | |
646 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
647 | ||
648 | if (!condition || !IS_USAGE_CONDITION(condition) || !channel_name || | |
649 | strlen(channel_name) == 0) { | |
650 | status = LTTNG_CONDITION_STATUS_INVALID; | |
651 | goto end; | |
652 | } | |
653 | ||
654 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
655 | parent); | |
656 | channel_name_copy = strdup(channel_name); | |
657 | if (!channel_name_copy) { | |
658 | status = LTTNG_CONDITION_STATUS_ERROR; | |
659 | goto end; | |
660 | } | |
661 | ||
662 | if (usage->channel_name) { | |
663 | free(usage->channel_name); | |
664 | } | |
665 | usage->channel_name = channel_name_copy; | |
666 | end: | |
667 | return status; | |
668 | } | |
669 | ||
670 | enum lttng_condition_status | |
671 | lttng_condition_buffer_usage_get_domain_type( | |
672 | const struct lttng_condition *condition, | |
673 | enum lttng_domain_type *type) | |
674 | { | |
675 | struct lttng_condition_buffer_usage *usage; | |
676 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
677 | ||
678 | if (!condition || !IS_USAGE_CONDITION(condition) || !type) { | |
679 | status = LTTNG_CONDITION_STATUS_INVALID; | |
680 | goto end; | |
681 | } | |
682 | ||
683 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
684 | parent); | |
685 | if (!usage->domain.set) { | |
686 | status = LTTNG_CONDITION_STATUS_UNSET; | |
687 | goto end; | |
688 | } | |
689 | *type = usage->domain.type; | |
690 | end: | |
691 | return status; | |
692 | } | |
693 | ||
694 | enum lttng_condition_status | |
695 | lttng_condition_buffer_usage_set_domain_type( | |
696 | struct lttng_condition *condition, enum lttng_domain_type type) | |
697 | { | |
698 | struct lttng_condition_buffer_usage *usage; | |
699 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
700 | ||
701 | if (!condition || !IS_USAGE_CONDITION(condition) || | |
702 | type == LTTNG_DOMAIN_NONE) { | |
703 | status = LTTNG_CONDITION_STATUS_INVALID; | |
704 | goto end; | |
705 | } | |
706 | ||
707 | usage = container_of(condition, struct lttng_condition_buffer_usage, | |
708 | parent); | |
709 | usage->domain.set = true; | |
710 | usage->domain.type = type; | |
711 | end: | |
712 | return status; | |
713 | } | |
714 | ||
715 | static | |
3647288f | 716 | int lttng_evaluation_buffer_usage_serialize( |
9b63a4aa | 717 | const struct lttng_evaluation *evaluation, |
c0a66c84 | 718 | struct lttng_payload *payload) |
a58c490f | 719 | { |
a58c490f | 720 | struct lttng_evaluation_buffer_usage *usage; |
3647288f | 721 | struct lttng_evaluation_buffer_usage_comm comm; |
a58c490f JG |
722 | |
723 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
724 | parent); | |
3647288f JG |
725 | comm.buffer_use = usage->buffer_use; |
726 | comm.buffer_capacity = usage->buffer_capacity; | |
a58c490f | 727 | |
c0a66c84 JG |
728 | return lttng_dynamic_buffer_append( |
729 | &payload->buffer, &comm, sizeof(comm)); | |
a58c490f JG |
730 | } |
731 | ||
732 | static | |
733 | void lttng_evaluation_buffer_usage_destroy( | |
734 | struct lttng_evaluation *evaluation) | |
735 | { | |
736 | struct lttng_evaluation_buffer_usage *usage; | |
737 | ||
738 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
739 | parent); | |
740 | free(usage); | |
741 | } | |
742 | ||
743 | LTTNG_HIDDEN | |
744 | struct lttng_evaluation *lttng_evaluation_buffer_usage_create( | |
745 | enum lttng_condition_type type, uint64_t use, uint64_t capacity) | |
746 | { | |
747 | struct lttng_evaluation_buffer_usage *usage; | |
748 | ||
749 | usage = zmalloc(sizeof(struct lttng_evaluation_buffer_usage)); | |
750 | if (!usage) { | |
751 | goto end; | |
752 | } | |
753 | ||
754 | usage->parent.type = type; | |
755 | usage->buffer_use = use; | |
756 | usage->buffer_capacity = capacity; | |
757 | usage->parent.serialize = lttng_evaluation_buffer_usage_serialize; | |
758 | usage->parent.destroy = lttng_evaluation_buffer_usage_destroy; | |
759 | end: | |
760 | return &usage->parent; | |
761 | } | |
762 | ||
763 | /* | |
764 | * Get the sampled buffer usage which caused the associated condition to | |
765 | * evaluate to "true". | |
766 | */ | |
767 | enum lttng_evaluation_status | |
768 | lttng_evaluation_buffer_usage_get_usage_ratio( | |
769 | const struct lttng_evaluation *evaluation, double *usage_ratio) | |
770 | { | |
771 | struct lttng_evaluation_buffer_usage *usage; | |
772 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
773 | ||
774 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_ratio) { | |
775 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
776 | goto end; | |
777 | } | |
778 | ||
779 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
780 | parent); | |
781 | *usage_ratio = (double) usage->buffer_use / | |
782 | (double) usage->buffer_capacity; | |
783 | end: | |
784 | return status; | |
785 | } | |
786 | ||
787 | enum lttng_evaluation_status | |
788 | lttng_evaluation_buffer_usage_get_usage( | |
789 | const struct lttng_evaluation *evaluation, | |
790 | uint64_t *usage_bytes) | |
791 | { | |
792 | struct lttng_evaluation_buffer_usage *usage; | |
793 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
794 | ||
795 | if (!evaluation || !is_usage_evaluation(evaluation) || !usage_bytes) { | |
796 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
797 | goto end; | |
798 | } | |
799 | ||
800 | usage = container_of(evaluation, struct lttng_evaluation_buffer_usage, | |
801 | parent); | |
802 | *usage_bytes = usage->buffer_use; | |
803 | end: | |
804 | return status; | |
805 | } |