Commit | Line | Data |
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757c48a2 SM |
1 | /* |
2 | * Copyright (C) 2019 Simon Marchi <simon.marchi@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <assert.h> | |
9 | #include <common/error.h> | |
10 | #include <common/macros.h> | |
0f7c2963 | 11 | #include <common/mi-lttng.h> |
9e620ea7 | 12 | #include <common/payload-view.h> |
d35c7a38 JR |
13 | #include <common/payload.h> |
14 | #include <common/snapshot.h> | |
15 | #include <inttypes.h> | |
757c48a2 | 16 | #include <lttng/action/action-internal.h> |
7f4d5b07 JR |
17 | #include <lttng/action/rate-policy-internal.h> |
18 | #include <lttng/action/rate-policy.h> | |
757c48a2 SM |
19 | #include <lttng/action/snapshot-session-internal.h> |
20 | #include <lttng/action/snapshot-session.h> | |
757c48a2 | 21 | #include <lttng/snapshot-internal.h> |
d35c7a38 | 22 | #include <lttng/snapshot.h> |
757c48a2 SM |
23 | |
24 | #define IS_SNAPSHOT_SESSION_ACTION(action) \ | |
17182cfd | 25 | (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_SNAPSHOT_SESSION) |
757c48a2 SM |
26 | |
27 | struct lttng_action_snapshot_session { | |
28 | struct lttng_action parent; | |
29 | ||
30 | /* Owned by this. */ | |
31 | char *session_name; | |
32 | ||
33 | /* | |
34 | * When non-NULL, use this custom output when taking the snapshot, | |
35 | * rather than the session's registered snapshot output. | |
36 | * | |
37 | * Owned by this. | |
38 | */ | |
39 | struct lttng_snapshot_output *output; | |
7f4d5b07 | 40 | struct lttng_rate_policy *policy; |
757c48a2 SM |
41 | }; |
42 | ||
43 | struct lttng_action_snapshot_session_comm { | |
44 | /* All string lengths include the trailing \0. */ | |
45 | uint32_t session_name_len; | |
46 | uint32_t snapshot_output_len; | |
7f4d5b07 | 47 | uint32_t rate_policy_len; |
757c48a2 SM |
48 | |
49 | /* | |
50 | * Variable data (all strings are null-terminated): | |
51 | * | |
52 | * - session name string | |
53 | * - snapshot output object | |
d35c7a38 | 54 | * - policy object |
757c48a2 SM |
55 | */ |
56 | char data[]; | |
57 | } LTTNG_PACKED; | |
58 | ||
7f4d5b07 JR |
59 | static const struct lttng_rate_policy * |
60 | lttng_action_snapshot_session_internal_get_rate_policy( | |
2d57482c JR |
61 | const struct lttng_action *action); |
62 | ||
757c48a2 SM |
63 | static struct lttng_action_snapshot_session * |
64 | action_snapshot_session_from_action(struct lttng_action *action) | |
65 | { | |
66 | assert(action); | |
67 | ||
68 | return container_of( | |
69 | action, struct lttng_action_snapshot_session, parent); | |
70 | } | |
71 | ||
72 | static const struct lttng_action_snapshot_session * | |
73 | action_snapshot_session_from_action_const(const struct lttng_action *action) | |
74 | { | |
75 | assert(action); | |
76 | ||
77 | return container_of( | |
78 | action, struct lttng_action_snapshot_session, parent); | |
79 | } | |
80 | ||
81 | static bool lttng_action_snapshot_session_validate(struct lttng_action *action) | |
82 | { | |
83 | bool valid = false; | |
84 | struct lttng_action_snapshot_session *action_snapshot_session; | |
85 | ||
86 | if (!action) { | |
87 | goto end; | |
88 | } | |
89 | ||
90 | action_snapshot_session = action_snapshot_session_from_action(action); | |
91 | ||
92 | /* A non-empty session name is mandatory. */ | |
93 | if (!action_snapshot_session->session_name || | |
94 | strlen(action_snapshot_session->session_name) == 0) { | |
95 | goto end; | |
96 | } | |
97 | ||
98 | if (action_snapshot_session->output && | |
99 | !lttng_snapshot_output_validate(action_snapshot_session->output)) { | |
100 | goto end; | |
101 | } | |
102 | ||
103 | valid = true; | |
104 | end: | |
105 | return valid; | |
106 | } | |
107 | ||
108 | static bool lttng_action_snapshot_session_is_equal( | |
109 | const struct lttng_action *_a, const struct lttng_action *_b) | |
110 | { | |
111 | bool is_equal = false; | |
112 | const struct lttng_action_snapshot_session *a, *b; | |
113 | ||
114 | a = action_snapshot_session_from_action_const(_a); | |
115 | b = action_snapshot_session_from_action_const(_b); | |
116 | ||
117 | /* Action is not valid if this is not true. */ | |
118 | assert(a->session_name); | |
119 | assert(b->session_name); | |
120 | if (strcmp(a->session_name, b->session_name)) { | |
121 | goto end; | |
122 | } | |
123 | ||
124 | if (a->output && b->output && | |
125 | !lttng_snapshot_output_is_equal(a->output, b->output)) { | |
126 | goto end; | |
127 | } else if (!!a->output != !!b->output) { | |
128 | goto end; | |
129 | } | |
130 | ||
7f4d5b07 | 131 | is_equal = lttng_rate_policy_is_equal(a->policy, b->policy); |
757c48a2 SM |
132 | end: |
133 | return is_equal; | |
134 | } | |
135 | ||
0c51e8f3 | 136 | static size_t serialize_strlen(const char *str) |
757c48a2 | 137 | { |
0c51e8f3 | 138 | return str ? strlen(str) + 1 : 0; |
757c48a2 SM |
139 | } |
140 | ||
141 | static int lttng_action_snapshot_session_serialize( | |
142 | struct lttng_action *action, struct lttng_payload *payload) | |
143 | { | |
144 | struct lttng_action_snapshot_session *action_snapshot_session; | |
145 | struct lttng_action_snapshot_session_comm comm = {}; | |
146 | int ret; | |
147 | size_t size_before_comm; | |
148 | ||
149 | assert(action); | |
150 | assert(payload); | |
151 | ||
152 | size_before_comm = payload->buffer.size; | |
757c48a2 SM |
153 | |
154 | action_snapshot_session = action_snapshot_session_from_action(action); | |
155 | comm.session_name_len = | |
156 | serialize_strlen(action_snapshot_session->session_name); | |
157 | ||
158 | /* Add header. */ | |
159 | ret = lttng_dynamic_buffer_append( | |
160 | &payload->buffer, &comm, sizeof(comm)); | |
161 | if (ret) { | |
162 | goto end; | |
163 | } | |
164 | ||
165 | assert(action_snapshot_session->session_name); | |
166 | DBG("Serializing snapshot session action: session-name: %s", | |
167 | action_snapshot_session->session_name); | |
168 | ||
169 | /* Add session name. */ | |
170 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
171 | action_snapshot_session->session_name, | |
172 | comm.session_name_len); | |
173 | if (ret) { | |
174 | goto end; | |
175 | } | |
176 | ||
177 | /* Serialize the snapshot output object, if any. */ | |
178 | if (action_snapshot_session->output) { | |
179 | const size_t size_before_output = payload->buffer.size; | |
180 | struct lttng_action_snapshot_session_comm *comm_in_payload; | |
181 | ||
182 | ret = lttng_snapshot_output_serialize( | |
183 | action_snapshot_session->output, | |
184 | payload); | |
185 | if (ret) { | |
186 | goto end; | |
187 | } | |
188 | ||
757c48a2 SM |
189 | comm_in_payload = (typeof(comm_in_payload))( |
190 | payload->buffer.data + size_before_comm); | |
d35c7a38 | 191 | /* Adjust action length in header. */ |
757c48a2 SM |
192 | comm_in_payload->snapshot_output_len = |
193 | payload->buffer.size - size_before_output; | |
194 | } | |
195 | ||
7f4d5b07 | 196 | /* Serialize the rate policy. */ |
d35c7a38 JR |
197 | { |
198 | const size_t size_before_output = payload->buffer.size; | |
199 | struct lttng_action_snapshot_session_comm *comm_in_payload; | |
200 | ||
7f4d5b07 | 201 | ret = lttng_rate_policy_serialize( |
d35c7a38 JR |
202 | action_snapshot_session->policy, payload); |
203 | if (ret) { | |
204 | ret = -1; | |
205 | goto end; | |
206 | } | |
207 | ||
208 | comm_in_payload = (typeof(comm_in_payload))( | |
209 | payload->buffer.data + size_before_comm); | |
7f4d5b07 JR |
210 | /* Adjust rate policy length in header. */ |
211 | comm_in_payload->rate_policy_len = | |
d35c7a38 JR |
212 | payload->buffer.size - size_before_output; |
213 | } | |
214 | ||
757c48a2 SM |
215 | end: |
216 | return ret; | |
217 | } | |
218 | ||
219 | static void lttng_action_snapshot_session_destroy(struct lttng_action *action) | |
220 | { | |
221 | struct lttng_action_snapshot_session *action_snapshot_session; | |
222 | ||
223 | if (!action) { | |
224 | goto end; | |
225 | } | |
226 | ||
227 | action_snapshot_session = action_snapshot_session_from_action(action); | |
228 | ||
229 | free(action_snapshot_session->session_name); | |
230 | lttng_snapshot_output_destroy(action_snapshot_session->output); | |
7f4d5b07 | 231 | lttng_rate_policy_destroy(action_snapshot_session->policy); |
757c48a2 SM |
232 | free(action_snapshot_session); |
233 | ||
234 | end: | |
235 | return; | |
236 | } | |
237 | ||
238 | ssize_t lttng_action_snapshot_session_create_from_payload( | |
239 | struct lttng_payload_view *view, | |
240 | struct lttng_action **p_action) | |
241 | { | |
242 | ssize_t consumed_len; | |
757c48a2 SM |
243 | const char *variable_data; |
244 | struct lttng_action *action; | |
245 | enum lttng_action_status status; | |
246 | struct lttng_snapshot_output *snapshot_output = NULL; | |
7f4d5b07 | 247 | struct lttng_rate_policy *policy = NULL; |
3e6e0df2 JG |
248 | const struct lttng_action_snapshot_session_comm *comm; |
249 | const struct lttng_payload_view snapshot_session_comm_view = | |
250 | lttng_payload_view_from_view( | |
251 | view, 0, sizeof(*comm)); | |
757c48a2 SM |
252 | |
253 | action = lttng_action_snapshot_session_create(); | |
254 | if (!action) { | |
255 | goto error; | |
256 | } | |
257 | ||
3e6e0df2 JG |
258 | if (!lttng_payload_view_is_valid(&snapshot_session_comm_view)) { |
259 | /* Payload not large enough to contain the header. */ | |
260 | goto error; | |
261 | } | |
262 | ||
263 | comm = (typeof(comm)) snapshot_session_comm_view.buffer.data; | |
757c48a2 SM |
264 | variable_data = (const char *) &comm->data; |
265 | ||
266 | consumed_len = sizeof(struct lttng_action_snapshot_session_comm); | |
267 | ||
268 | if (!lttng_buffer_view_contains_string( | |
269 | &view->buffer, variable_data, comm->session_name_len)) { | |
270 | goto error; | |
271 | } | |
272 | ||
273 | status = lttng_action_snapshot_session_set_session_name( | |
274 | action, variable_data); | |
275 | if (status != LTTNG_ACTION_STATUS_OK) { | |
276 | goto error; | |
277 | } | |
278 | ||
279 | variable_data += comm->session_name_len; | |
280 | consumed_len += comm->session_name_len; | |
281 | ||
282 | /* If there is a snapshot output object, deserialize it. */ | |
283 | if (comm->snapshot_output_len > 0) { | |
284 | ssize_t snapshot_output_consumed_len; | |
285 | enum lttng_action_status action_status; | |
286 | struct lttng_payload_view snapshot_output_buffer_view = | |
287 | lttng_payload_view_from_view(view, consumed_len, | |
288 | comm->snapshot_output_len); | |
289 | ||
3e6e0df2 | 290 | if (!lttng_payload_view_is_valid(&snapshot_output_buffer_view)) { |
0c51e8f3 | 291 | ERR("Failed to create buffer view for snapshot output."); |
757c48a2 SM |
292 | goto error; |
293 | } | |
294 | ||
295 | snapshot_output_consumed_len = | |
296 | lttng_snapshot_output_create_from_payload( | |
297 | &snapshot_output_buffer_view, | |
298 | &snapshot_output); | |
299 | if (snapshot_output_consumed_len != comm->snapshot_output_len) { | |
0c51e8f3 | 300 | ERR("Failed to deserialize snapshot output object: " |
757c48a2 SM |
301 | "consumed-len: %zd, expected-len: %" PRIu32, |
302 | snapshot_output_consumed_len, | |
303 | comm->snapshot_output_len); | |
304 | goto error; | |
305 | } | |
306 | ||
307 | action_status = lttng_action_snapshot_session_set_output( | |
308 | action, snapshot_output); | |
309 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
310 | goto error; | |
311 | } | |
312 | ||
313 | /* Ownership has been transferred to the action. */ | |
314 | snapshot_output = NULL; | |
315 | } | |
316 | ||
317 | variable_data += comm->snapshot_output_len; | |
318 | consumed_len += comm->snapshot_output_len; | |
d35c7a38 | 319 | |
7f4d5b07 JR |
320 | /* Rate policy. */ |
321 | if (comm->rate_policy_len <= 0) { | |
322 | ERR("Rate policy should be present."); | |
d35c7a38 JR |
323 | goto error; |
324 | } | |
325 | { | |
7f4d5b07 | 326 | ssize_t rate_policy_consumed_len; |
d35c7a38 JR |
327 | struct lttng_payload_view policy_view = |
328 | lttng_payload_view_from_view(view, consumed_len, | |
7f4d5b07 | 329 | comm->rate_policy_len); |
d35c7a38 JR |
330 | |
331 | if (!lttng_payload_view_is_valid(&policy_view)) { | |
7f4d5b07 | 332 | ERR("Failed to create buffer view for rate policy."); |
d35c7a38 JR |
333 | goto error; |
334 | } | |
335 | ||
7f4d5b07 JR |
336 | rate_policy_consumed_len = |
337 | lttng_rate_policy_create_from_payload( | |
d35c7a38 | 338 | &policy_view, &policy); |
7f4d5b07 | 339 | if (rate_policy_consumed_len < 0) { |
d35c7a38 JR |
340 | goto error; |
341 | } | |
342 | ||
7f4d5b07 JR |
343 | if (rate_policy_consumed_len != comm->rate_policy_len) { |
344 | ERR("Failed to deserialize rate policy object: " | |
d35c7a38 | 345 | "consumed-len: %zd, expected-len: %" PRIu32, |
7f4d5b07 JR |
346 | rate_policy_consumed_len, |
347 | comm->rate_policy_len); | |
d35c7a38 JR |
348 | goto error; |
349 | } | |
350 | ||
7f4d5b07 | 351 | status = lttng_action_snapshot_session_set_rate_policy( |
d35c7a38 JR |
352 | action, policy); |
353 | if (status != LTTNG_ACTION_STATUS_OK) { | |
354 | goto error; | |
355 | } | |
356 | } | |
357 | ||
7f4d5b07 JR |
358 | variable_data += comm->rate_policy_len; |
359 | consumed_len += comm->rate_policy_len; | |
d35c7a38 | 360 | |
757c48a2 SM |
361 | *p_action = action; |
362 | action = NULL; | |
363 | ||
364 | goto end; | |
365 | ||
366 | error: | |
367 | consumed_len = -1; | |
368 | ||
369 | end: | |
7f4d5b07 | 370 | lttng_rate_policy_destroy(policy); |
757c48a2 SM |
371 | lttng_action_snapshot_session_destroy(action); |
372 | lttng_snapshot_output_destroy(snapshot_output); | |
373 | ||
374 | return consumed_len; | |
375 | } | |
376 | ||
0f7c2963 JR |
377 | static enum lttng_error_code lttng_action_snapshot_session_mi_serialize( |
378 | const struct lttng_action *action, struct mi_writer *writer) | |
379 | { | |
380 | int ret; | |
381 | enum lttng_error_code ret_code; | |
382 | enum lttng_action_status status; | |
383 | const char *session_name = NULL; | |
384 | const struct lttng_snapshot_output *output = NULL; | |
385 | const struct lttng_rate_policy *policy = NULL; | |
386 | ||
387 | assert(action); | |
388 | assert(IS_SNAPSHOT_SESSION_ACTION(action)); | |
389 | ||
390 | status = lttng_action_snapshot_session_get_session_name( | |
391 | action, &session_name); | |
392 | assert(status == LTTNG_ACTION_STATUS_OK); | |
393 | assert(session_name != NULL); | |
394 | ||
395 | status = lttng_action_snapshot_session_get_rate_policy(action, &policy); | |
396 | assert(status == LTTNG_ACTION_STATUS_OK); | |
397 | assert(policy != NULL); | |
398 | ||
399 | /* Open action snapshot session element. */ | |
400 | ret = mi_lttng_writer_open_element( | |
401 | writer, mi_lttng_element_action_snapshot_session); | |
402 | if (ret) { | |
403 | goto mi_error; | |
404 | } | |
405 | ||
406 | /* Session name. */ | |
407 | ret = mi_lttng_writer_write_element_string( | |
408 | writer, mi_lttng_element_session_name, session_name); | |
409 | if (ret) { | |
410 | goto mi_error; | |
411 | } | |
412 | ||
413 | /* Output if any. */ | |
414 | status = lttng_action_snapshot_session_get_output(action, &output); | |
415 | if (status == LTTNG_ACTION_STATUS_OK) { | |
416 | assert(output != NULL); | |
417 | ret_code = lttng_snapshot_output_mi_serialize(output, writer); | |
418 | if (ret_code != LTTNG_OK) { | |
419 | goto end; | |
420 | } | |
421 | } else if (status != LTTNG_ACTION_STATUS_UNSET) { | |
422 | /* This should not happen at this point. */ | |
423 | abort(); | |
424 | } | |
425 | ||
426 | /* Rate policy. */ | |
427 | ret_code = lttng_rate_policy_mi_serialize(policy, writer); | |
428 | if (ret_code != LTTNG_OK) { | |
429 | goto end; | |
430 | } | |
431 | ||
432 | /* Close action_snapshot_session element. */ | |
433 | ret = mi_lttng_writer_close_element(writer); | |
434 | if (ret) { | |
435 | goto mi_error; | |
436 | } | |
437 | ||
438 | ret_code = LTTNG_OK; | |
439 | goto end; | |
440 | ||
441 | mi_error: | |
442 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
443 | end: | |
444 | return ret_code; | |
445 | } | |
446 | ||
757c48a2 SM |
447 | struct lttng_action *lttng_action_snapshot_session_create(void) |
448 | { | |
d35c7a38 | 449 | struct lttng_action *action = NULL; |
7f4d5b07 | 450 | struct lttng_rate_policy *policy = NULL; |
d35c7a38 JR |
451 | enum lttng_action_status status; |
452 | ||
7f4d5b07 JR |
453 | /* Create a every N = 1 rate policy. */ |
454 | policy = lttng_rate_policy_every_n_create(1); | |
d35c7a38 JR |
455 | if (!policy) { |
456 | goto end; | |
457 | } | |
757c48a2 SM |
458 | |
459 | action = zmalloc(sizeof(struct lttng_action_snapshot_session)); | |
460 | if (!action) { | |
461 | goto end; | |
462 | } | |
463 | ||
464 | lttng_action_init(action, LTTNG_ACTION_TYPE_SNAPSHOT_SESSION, | |
465 | lttng_action_snapshot_session_validate, | |
466 | lttng_action_snapshot_session_serialize, | |
467 | lttng_action_snapshot_session_is_equal, | |
2d57482c | 468 | lttng_action_snapshot_session_destroy, |
588c4b0d | 469 | lttng_action_snapshot_session_internal_get_rate_policy, |
0f7c2963 JR |
470 | lttng_action_generic_add_error_query_results, |
471 | lttng_action_snapshot_session_mi_serialize); | |
757c48a2 | 472 | |
7f4d5b07 | 473 | status = lttng_action_snapshot_session_set_rate_policy(action, policy); |
d35c7a38 JR |
474 | if (status != LTTNG_ACTION_STATUS_OK) { |
475 | free(action); | |
476 | action = NULL; | |
477 | goto end; | |
478 | } | |
479 | ||
757c48a2 | 480 | end: |
7f4d5b07 | 481 | lttng_rate_policy_destroy(policy); |
757c48a2 SM |
482 | return action; |
483 | } | |
484 | ||
485 | enum lttng_action_status lttng_action_snapshot_session_set_session_name( | |
486 | struct lttng_action *action, const char *session_name) | |
487 | { | |
488 | struct lttng_action_snapshot_session *action_snapshot_session; | |
489 | enum lttng_action_status status; | |
490 | ||
491 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !session_name || | |
492 | strlen(session_name) == 0) { | |
493 | status = LTTNG_ACTION_STATUS_INVALID; | |
494 | goto end; | |
495 | } | |
496 | ||
497 | action_snapshot_session = action_snapshot_session_from_action(action); | |
498 | ||
499 | free(action_snapshot_session->session_name); | |
500 | ||
501 | action_snapshot_session->session_name = strdup(session_name); | |
502 | if (!action_snapshot_session->session_name) { | |
503 | status = LTTNG_ACTION_STATUS_ERROR; | |
504 | goto end; | |
505 | } | |
506 | ||
507 | status = LTTNG_ACTION_STATUS_OK; | |
508 | end: | |
509 | return status; | |
510 | } | |
511 | ||
512 | enum lttng_action_status lttng_action_snapshot_session_get_session_name( | |
513 | const struct lttng_action *action, const char **session_name) | |
514 | { | |
515 | const struct lttng_action_snapshot_session *action_snapshot_session; | |
516 | enum lttng_action_status status; | |
517 | ||
518 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !session_name) { | |
519 | status = LTTNG_ACTION_STATUS_INVALID; | |
520 | goto end; | |
521 | } | |
522 | ||
523 | action_snapshot_session = action_snapshot_session_from_action_const(action); | |
524 | ||
525 | if (action_snapshot_session->session_name) { | |
526 | *session_name = action_snapshot_session->session_name; | |
527 | status = LTTNG_ACTION_STATUS_OK; | |
528 | } else { | |
529 | status = LTTNG_ACTION_STATUS_UNSET; | |
530 | } | |
531 | ||
532 | end: | |
533 | ||
534 | return status; | |
535 | } | |
536 | ||
537 | enum lttng_action_status lttng_action_snapshot_session_set_output( | |
538 | struct lttng_action *action, | |
539 | struct lttng_snapshot_output *output) | |
540 | { | |
541 | struct lttng_action_snapshot_session *action_snapshot_session; | |
542 | enum lttng_action_status status; | |
543 | ||
544 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !output) { | |
545 | status = LTTNG_ACTION_STATUS_INVALID; | |
546 | goto end; | |
547 | } | |
548 | ||
549 | action_snapshot_session = action_snapshot_session_from_action(action); | |
550 | ||
551 | lttng_snapshot_output_destroy(action_snapshot_session->output); | |
552 | action_snapshot_session->output = output; | |
553 | ||
554 | status = LTTNG_ACTION_STATUS_OK; | |
555 | ||
556 | end: | |
557 | return status; | |
558 | } | |
559 | ||
560 | enum lttng_action_status lttng_action_snapshot_session_get_output( | |
561 | const struct lttng_action *action, | |
562 | const struct lttng_snapshot_output **output) | |
563 | { | |
564 | const struct lttng_action_snapshot_session *action_snapshot_session; | |
565 | enum lttng_action_status status; | |
566 | ||
567 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action)|| !output) { | |
568 | status = LTTNG_ACTION_STATUS_INVALID; | |
569 | goto end; | |
570 | } | |
571 | ||
572 | action_snapshot_session = action_snapshot_session_from_action_const(action); | |
573 | ||
574 | if (action_snapshot_session->output) { | |
575 | *output = action_snapshot_session->output; | |
576 | status = LTTNG_ACTION_STATUS_OK; | |
577 | } else { | |
578 | status = LTTNG_ACTION_STATUS_UNSET; | |
579 | } | |
580 | ||
581 | end: | |
582 | return status; | |
583 | } | |
d35c7a38 | 584 | |
7f4d5b07 | 585 | enum lttng_action_status lttng_action_snapshot_session_set_rate_policy( |
d35c7a38 | 586 | struct lttng_action *action, |
7f4d5b07 | 587 | const struct lttng_rate_policy *policy) |
d35c7a38 JR |
588 | { |
589 | enum lttng_action_status status; | |
590 | struct lttng_action_snapshot_session *snapshot_session_action; | |
7f4d5b07 | 591 | struct lttng_rate_policy *copy = NULL; |
d35c7a38 JR |
592 | |
593 | if (!action || !policy || !IS_SNAPSHOT_SESSION_ACTION(action)) { | |
594 | status = LTTNG_ACTION_STATUS_INVALID; | |
595 | goto end; | |
596 | } | |
597 | ||
7f4d5b07 | 598 | copy = lttng_rate_policy_copy(policy); |
d35c7a38 JR |
599 | if (!copy) { |
600 | status = LTTNG_ACTION_STATUS_ERROR; | |
601 | goto end; | |
602 | } | |
603 | ||
604 | snapshot_session_action = action_snapshot_session_from_action(action); | |
605 | ||
7f4d5b07 JR |
606 | /* Free the previous rate policy .*/ |
607 | lttng_rate_policy_destroy(snapshot_session_action->policy); | |
d35c7a38 JR |
608 | |
609 | /* Assign the policy. */ | |
610 | snapshot_session_action->policy = copy; | |
611 | status = LTTNG_ACTION_STATUS_OK; | |
612 | copy = NULL; | |
613 | ||
614 | end: | |
7f4d5b07 | 615 | lttng_rate_policy_destroy(copy); |
d35c7a38 JR |
616 | return status; |
617 | } | |
618 | ||
7f4d5b07 | 619 | enum lttng_action_status lttng_action_snapshot_session_get_rate_policy( |
d35c7a38 | 620 | const struct lttng_action *action, |
7f4d5b07 | 621 | const struct lttng_rate_policy **policy) |
d35c7a38 JR |
622 | { |
623 | enum lttng_action_status status; | |
624 | const struct lttng_action_snapshot_session *snapshot_session_action; | |
625 | ||
626 | if (!action || !policy || !IS_SNAPSHOT_SESSION_ACTION(action)) { | |
627 | status = LTTNG_ACTION_STATUS_INVALID; | |
628 | goto end; | |
629 | } | |
630 | ||
631 | snapshot_session_action = | |
632 | action_snapshot_session_from_action_const(action); | |
633 | ||
634 | *policy = snapshot_session_action->policy; | |
635 | status = LTTNG_ACTION_STATUS_OK; | |
636 | end: | |
637 | return status; | |
638 | } | |
2d57482c | 639 | |
7f4d5b07 JR |
640 | static const struct lttng_rate_policy * |
641 | lttng_action_snapshot_session_internal_get_rate_policy( | |
2d57482c JR |
642 | const struct lttng_action *action) |
643 | { | |
644 | const struct lttng_action_snapshot_session *_action; | |
645 | _action = action_snapshot_session_from_action_const(action); | |
646 | ||
647 | return _action->policy; | |
648 | } |