Commit | Line | Data |
---|---|---|
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 | ||
757c48a2 SM |
8 | #include <common/error.h> |
9 | #include <common/macros.h> | |
6a751b95 | 10 | #include <common/mi-lttng.h> |
9e620ea7 | 11 | #include <common/payload-view.h> |
d35c7a38 JR |
12 | #include <common/payload.h> |
13 | #include <common/snapshot.h> | |
14 | #include <inttypes.h> | |
757c48a2 | 15 | #include <lttng/action/action-internal.h> |
7f4d5b07 JR |
16 | #include <lttng/action/rate-policy-internal.h> |
17 | #include <lttng/action/rate-policy.h> | |
757c48a2 SM |
18 | #include <lttng/action/snapshot-session-internal.h> |
19 | #include <lttng/action/snapshot-session.h> | |
757c48a2 | 20 | #include <lttng/snapshot-internal.h> |
d35c7a38 | 21 | #include <lttng/snapshot.h> |
757c48a2 SM |
22 | |
23 | #define IS_SNAPSHOT_SESSION_ACTION(action) \ | |
17182cfd | 24 | (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_SNAPSHOT_SESSION) |
757c48a2 SM |
25 | |
26 | struct lttng_action_snapshot_session { | |
27 | struct lttng_action parent; | |
28 | ||
29 | /* Owned by this. */ | |
30 | char *session_name; | |
31 | ||
32 | /* | |
33 | * When non-NULL, use this custom output when taking the snapshot, | |
34 | * rather than the session's registered snapshot output. | |
35 | * | |
36 | * Owned by this. | |
37 | */ | |
38 | struct lttng_snapshot_output *output; | |
7f4d5b07 | 39 | struct lttng_rate_policy *policy; |
757c48a2 SM |
40 | }; |
41 | ||
42 | struct lttng_action_snapshot_session_comm { | |
43 | /* All string lengths include the trailing \0. */ | |
44 | uint32_t session_name_len; | |
45 | uint32_t snapshot_output_len; | |
7f4d5b07 | 46 | uint32_t rate_policy_len; |
757c48a2 SM |
47 | |
48 | /* | |
49 | * Variable data (all strings are null-terminated): | |
50 | * | |
51 | * - session name string | |
52 | * - snapshot output object | |
d35c7a38 | 53 | * - policy object |
757c48a2 SM |
54 | */ |
55 | char data[]; | |
56 | } LTTNG_PACKED; | |
57 | ||
7f4d5b07 JR |
58 | static const struct lttng_rate_policy * |
59 | lttng_action_snapshot_session_internal_get_rate_policy( | |
2d57482c JR |
60 | const struct lttng_action *action); |
61 | ||
757c48a2 SM |
62 | static struct lttng_action_snapshot_session * |
63 | action_snapshot_session_from_action(struct lttng_action *action) | |
64 | { | |
a0377dfe | 65 | LTTNG_ASSERT(action); |
757c48a2 SM |
66 | |
67 | return container_of( | |
68 | action, struct lttng_action_snapshot_session, parent); | |
69 | } | |
70 | ||
71 | static const struct lttng_action_snapshot_session * | |
72 | action_snapshot_session_from_action_const(const struct lttng_action *action) | |
73 | { | |
a0377dfe | 74 | LTTNG_ASSERT(action); |
757c48a2 SM |
75 | |
76 | return container_of( | |
77 | action, struct lttng_action_snapshot_session, parent); | |
78 | } | |
79 | ||
80 | static bool lttng_action_snapshot_session_validate(struct lttng_action *action) | |
81 | { | |
82 | bool valid = false; | |
83 | struct lttng_action_snapshot_session *action_snapshot_session; | |
84 | ||
85 | if (!action) { | |
86 | goto end; | |
87 | } | |
88 | ||
89 | action_snapshot_session = action_snapshot_session_from_action(action); | |
90 | ||
91 | /* A non-empty session name is mandatory. */ | |
92 | if (!action_snapshot_session->session_name || | |
93 | strlen(action_snapshot_session->session_name) == 0) { | |
94 | goto end; | |
95 | } | |
96 | ||
97 | if (action_snapshot_session->output && | |
98 | !lttng_snapshot_output_validate(action_snapshot_session->output)) { | |
99 | goto end; | |
100 | } | |
101 | ||
102 | valid = true; | |
103 | end: | |
104 | return valid; | |
105 | } | |
106 | ||
107 | static bool lttng_action_snapshot_session_is_equal( | |
108 | const struct lttng_action *_a, const struct lttng_action *_b) | |
109 | { | |
110 | bool is_equal = false; | |
111 | const struct lttng_action_snapshot_session *a, *b; | |
112 | ||
113 | a = action_snapshot_session_from_action_const(_a); | |
114 | b = action_snapshot_session_from_action_const(_b); | |
115 | ||
116 | /* Action is not valid if this is not true. */ | |
a0377dfe FD |
117 | LTTNG_ASSERT(a->session_name); |
118 | LTTNG_ASSERT(b->session_name); | |
757c48a2 SM |
119 | if (strcmp(a->session_name, b->session_name)) { |
120 | goto end; | |
121 | } | |
122 | ||
123 | if (a->output && b->output && | |
124 | !lttng_snapshot_output_is_equal(a->output, b->output)) { | |
125 | goto end; | |
126 | } else if (!!a->output != !!b->output) { | |
127 | goto end; | |
128 | } | |
129 | ||
7f4d5b07 | 130 | is_equal = lttng_rate_policy_is_equal(a->policy, b->policy); |
757c48a2 SM |
131 | end: |
132 | return is_equal; | |
133 | } | |
134 | ||
0c51e8f3 | 135 | static size_t serialize_strlen(const char *str) |
757c48a2 | 136 | { |
0c51e8f3 | 137 | return str ? strlen(str) + 1 : 0; |
757c48a2 SM |
138 | } |
139 | ||
140 | static int lttng_action_snapshot_session_serialize( | |
141 | struct lttng_action *action, struct lttng_payload *payload) | |
142 | { | |
143 | struct lttng_action_snapshot_session *action_snapshot_session; | |
144 | struct lttng_action_snapshot_session_comm comm = {}; | |
145 | int ret; | |
146 | size_t size_before_comm; | |
147 | ||
a0377dfe FD |
148 | LTTNG_ASSERT(action); |
149 | LTTNG_ASSERT(payload); | |
757c48a2 SM |
150 | |
151 | size_before_comm = payload->buffer.size; | |
757c48a2 SM |
152 | |
153 | action_snapshot_session = action_snapshot_session_from_action(action); | |
154 | comm.session_name_len = | |
155 | serialize_strlen(action_snapshot_session->session_name); | |
156 | ||
157 | /* Add header. */ | |
158 | ret = lttng_dynamic_buffer_append( | |
159 | &payload->buffer, &comm, sizeof(comm)); | |
160 | if (ret) { | |
161 | goto end; | |
162 | } | |
163 | ||
a0377dfe | 164 | LTTNG_ASSERT(action_snapshot_session->session_name); |
757c48a2 SM |
165 | DBG("Serializing snapshot session action: session-name: %s", |
166 | action_snapshot_session->session_name); | |
167 | ||
168 | /* Add session name. */ | |
169 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
170 | action_snapshot_session->session_name, | |
171 | comm.session_name_len); | |
172 | if (ret) { | |
173 | goto end; | |
174 | } | |
175 | ||
176 | /* Serialize the snapshot output object, if any. */ | |
177 | if (action_snapshot_session->output) { | |
178 | const size_t size_before_output = payload->buffer.size; | |
179 | struct lttng_action_snapshot_session_comm *comm_in_payload; | |
180 | ||
181 | ret = lttng_snapshot_output_serialize( | |
182 | action_snapshot_session->output, | |
183 | payload); | |
184 | if (ret) { | |
185 | goto end; | |
186 | } | |
187 | ||
757c48a2 SM |
188 | comm_in_payload = (typeof(comm_in_payload))( |
189 | payload->buffer.data + size_before_comm); | |
d35c7a38 | 190 | /* Adjust action length in header. */ |
757c48a2 SM |
191 | comm_in_payload->snapshot_output_len = |
192 | payload->buffer.size - size_before_output; | |
193 | } | |
194 | ||
7f4d5b07 | 195 | /* Serialize the rate policy. */ |
d35c7a38 JR |
196 | { |
197 | const size_t size_before_output = payload->buffer.size; | |
198 | struct lttng_action_snapshot_session_comm *comm_in_payload; | |
199 | ||
7f4d5b07 | 200 | ret = lttng_rate_policy_serialize( |
d35c7a38 JR |
201 | action_snapshot_session->policy, payload); |
202 | if (ret) { | |
203 | ret = -1; | |
204 | goto end; | |
205 | } | |
206 | ||
207 | comm_in_payload = (typeof(comm_in_payload))( | |
208 | payload->buffer.data + size_before_comm); | |
7f4d5b07 JR |
209 | /* Adjust rate policy length in header. */ |
210 | comm_in_payload->rate_policy_len = | |
d35c7a38 JR |
211 | payload->buffer.size - size_before_output; |
212 | } | |
213 | ||
757c48a2 SM |
214 | end: |
215 | return ret; | |
216 | } | |
217 | ||
218 | static void lttng_action_snapshot_session_destroy(struct lttng_action *action) | |
219 | { | |
220 | struct lttng_action_snapshot_session *action_snapshot_session; | |
221 | ||
222 | if (!action) { | |
223 | goto end; | |
224 | } | |
225 | ||
226 | action_snapshot_session = action_snapshot_session_from_action(action); | |
227 | ||
228 | free(action_snapshot_session->session_name); | |
229 | lttng_snapshot_output_destroy(action_snapshot_session->output); | |
7f4d5b07 | 230 | lttng_rate_policy_destroy(action_snapshot_session->policy); |
757c48a2 SM |
231 | free(action_snapshot_session); |
232 | ||
233 | end: | |
234 | return; | |
235 | } | |
236 | ||
237 | ssize_t lttng_action_snapshot_session_create_from_payload( | |
238 | struct lttng_payload_view *view, | |
239 | struct lttng_action **p_action) | |
240 | { | |
241 | ssize_t consumed_len; | |
757c48a2 SM |
242 | const char *variable_data; |
243 | struct lttng_action *action; | |
244 | enum lttng_action_status status; | |
245 | struct lttng_snapshot_output *snapshot_output = NULL; | |
7f4d5b07 | 246 | struct lttng_rate_policy *policy = NULL; |
3e6e0df2 JG |
247 | const struct lttng_action_snapshot_session_comm *comm; |
248 | const struct lttng_payload_view snapshot_session_comm_view = | |
249 | lttng_payload_view_from_view( | |
250 | view, 0, sizeof(*comm)); | |
757c48a2 SM |
251 | |
252 | action = lttng_action_snapshot_session_create(); | |
253 | if (!action) { | |
254 | goto error; | |
255 | } | |
256 | ||
3e6e0df2 JG |
257 | if (!lttng_payload_view_is_valid(&snapshot_session_comm_view)) { |
258 | /* Payload not large enough to contain the header. */ | |
259 | goto error; | |
260 | } | |
261 | ||
262 | comm = (typeof(comm)) snapshot_session_comm_view.buffer.data; | |
757c48a2 SM |
263 | variable_data = (const char *) &comm->data; |
264 | ||
265 | consumed_len = sizeof(struct lttng_action_snapshot_session_comm); | |
266 | ||
267 | if (!lttng_buffer_view_contains_string( | |
268 | &view->buffer, variable_data, comm->session_name_len)) { | |
269 | goto error; | |
270 | } | |
271 | ||
272 | status = lttng_action_snapshot_session_set_session_name( | |
273 | action, variable_data); | |
274 | if (status != LTTNG_ACTION_STATUS_OK) { | |
275 | goto error; | |
276 | } | |
277 | ||
278 | variable_data += comm->session_name_len; | |
279 | consumed_len += comm->session_name_len; | |
280 | ||
281 | /* If there is a snapshot output object, deserialize it. */ | |
282 | if (comm->snapshot_output_len > 0) { | |
283 | ssize_t snapshot_output_consumed_len; | |
284 | enum lttng_action_status action_status; | |
285 | struct lttng_payload_view snapshot_output_buffer_view = | |
286 | lttng_payload_view_from_view(view, consumed_len, | |
287 | comm->snapshot_output_len); | |
288 | ||
3e6e0df2 | 289 | if (!lttng_payload_view_is_valid(&snapshot_output_buffer_view)) { |
0c51e8f3 | 290 | ERR("Failed to create buffer view for snapshot output."); |
757c48a2 SM |
291 | goto error; |
292 | } | |
293 | ||
294 | snapshot_output_consumed_len = | |
295 | lttng_snapshot_output_create_from_payload( | |
296 | &snapshot_output_buffer_view, | |
297 | &snapshot_output); | |
298 | if (snapshot_output_consumed_len != comm->snapshot_output_len) { | |
0c51e8f3 | 299 | ERR("Failed to deserialize snapshot output object: " |
757c48a2 SM |
300 | "consumed-len: %zd, expected-len: %" PRIu32, |
301 | snapshot_output_consumed_len, | |
302 | comm->snapshot_output_len); | |
303 | goto error; | |
304 | } | |
305 | ||
306 | action_status = lttng_action_snapshot_session_set_output( | |
307 | action, snapshot_output); | |
308 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
309 | goto error; | |
310 | } | |
311 | ||
312 | /* Ownership has been transferred to the action. */ | |
313 | snapshot_output = NULL; | |
314 | } | |
315 | ||
316 | variable_data += comm->snapshot_output_len; | |
317 | consumed_len += comm->snapshot_output_len; | |
d35c7a38 | 318 | |
7f4d5b07 JR |
319 | /* Rate policy. */ |
320 | if (comm->rate_policy_len <= 0) { | |
321 | ERR("Rate policy should be present."); | |
d35c7a38 JR |
322 | goto error; |
323 | } | |
324 | { | |
7f4d5b07 | 325 | ssize_t rate_policy_consumed_len; |
d35c7a38 JR |
326 | struct lttng_payload_view policy_view = |
327 | lttng_payload_view_from_view(view, consumed_len, | |
7f4d5b07 | 328 | comm->rate_policy_len); |
d35c7a38 JR |
329 | |
330 | if (!lttng_payload_view_is_valid(&policy_view)) { | |
7f4d5b07 | 331 | ERR("Failed to create buffer view for rate policy."); |
d35c7a38 JR |
332 | goto error; |
333 | } | |
334 | ||
7f4d5b07 JR |
335 | rate_policy_consumed_len = |
336 | lttng_rate_policy_create_from_payload( | |
d35c7a38 | 337 | &policy_view, &policy); |
7f4d5b07 | 338 | if (rate_policy_consumed_len < 0) { |
d35c7a38 JR |
339 | goto error; |
340 | } | |
341 | ||
7f4d5b07 JR |
342 | if (rate_policy_consumed_len != comm->rate_policy_len) { |
343 | ERR("Failed to deserialize rate policy object: " | |
d35c7a38 | 344 | "consumed-len: %zd, expected-len: %" PRIu32, |
7f4d5b07 JR |
345 | rate_policy_consumed_len, |
346 | comm->rate_policy_len); | |
d35c7a38 JR |
347 | goto error; |
348 | } | |
349 | ||
7f4d5b07 | 350 | status = lttng_action_snapshot_session_set_rate_policy( |
d35c7a38 JR |
351 | action, policy); |
352 | if (status != LTTNG_ACTION_STATUS_OK) { | |
353 | goto error; | |
354 | } | |
355 | } | |
356 | ||
7f4d5b07 JR |
357 | variable_data += comm->rate_policy_len; |
358 | consumed_len += comm->rate_policy_len; | |
d35c7a38 | 359 | |
757c48a2 SM |
360 | *p_action = action; |
361 | action = NULL; | |
362 | ||
363 | goto end; | |
364 | ||
365 | error: | |
366 | consumed_len = -1; | |
367 | ||
368 | end: | |
7f4d5b07 | 369 | lttng_rate_policy_destroy(policy); |
757c48a2 SM |
370 | lttng_action_snapshot_session_destroy(action); |
371 | lttng_snapshot_output_destroy(snapshot_output); | |
372 | ||
373 | return consumed_len; | |
374 | } | |
375 | ||
6a751b95 JR |
376 | static enum lttng_error_code lttng_action_snapshot_session_mi_serialize( |
377 | const struct lttng_action *action, struct mi_writer *writer) | |
378 | { | |
379 | int ret; | |
380 | enum lttng_error_code ret_code; | |
381 | enum lttng_action_status status; | |
382 | const char *session_name = NULL; | |
383 | const struct lttng_snapshot_output *output = NULL; | |
384 | const struct lttng_rate_policy *policy = NULL; | |
385 | ||
a0377dfe FD |
386 | LTTNG_ASSERT(action); |
387 | LTTNG_ASSERT(IS_SNAPSHOT_SESSION_ACTION(action)); | |
6a751b95 JR |
388 | |
389 | status = lttng_action_snapshot_session_get_session_name( | |
390 | action, &session_name); | |
a0377dfe FD |
391 | LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK); |
392 | LTTNG_ASSERT(session_name != NULL); | |
6a751b95 JR |
393 | |
394 | status = lttng_action_snapshot_session_get_rate_policy(action, &policy); | |
a0377dfe FD |
395 | LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK); |
396 | LTTNG_ASSERT(policy != NULL); | |
6a751b95 JR |
397 | |
398 | /* Open action snapshot session element. */ | |
399 | ret = mi_lttng_writer_open_element( | |
400 | writer, mi_lttng_element_action_snapshot_session); | |
401 | if (ret) { | |
402 | goto mi_error; | |
403 | } | |
404 | ||
405 | /* Session name. */ | |
406 | ret = mi_lttng_writer_write_element_string( | |
407 | writer, mi_lttng_element_session_name, session_name); | |
408 | if (ret) { | |
409 | goto mi_error; | |
410 | } | |
411 | ||
412 | /* Output if any. */ | |
413 | status = lttng_action_snapshot_session_get_output(action, &output); | |
414 | if (status == LTTNG_ACTION_STATUS_OK) { | |
a0377dfe | 415 | LTTNG_ASSERT(output != NULL); |
6a751b95 JR |
416 | ret_code = lttng_snapshot_output_mi_serialize(output, writer); |
417 | if (ret_code != LTTNG_OK) { | |
418 | goto end; | |
419 | } | |
420 | } else if (status != LTTNG_ACTION_STATUS_UNSET) { | |
421 | /* This should not happen at this point. */ | |
422 | abort(); | |
423 | } | |
424 | ||
425 | /* Rate policy. */ | |
426 | ret_code = lttng_rate_policy_mi_serialize(policy, writer); | |
427 | if (ret_code != LTTNG_OK) { | |
428 | goto end; | |
429 | } | |
430 | ||
431 | /* Close action_snapshot_session element. */ | |
432 | ret = mi_lttng_writer_close_element(writer); | |
433 | if (ret) { | |
434 | goto mi_error; | |
435 | } | |
436 | ||
437 | ret_code = LTTNG_OK; | |
438 | goto end; | |
439 | ||
440 | mi_error: | |
441 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
442 | end: | |
443 | return ret_code; | |
444 | } | |
445 | ||
757c48a2 SM |
446 | struct lttng_action *lttng_action_snapshot_session_create(void) |
447 | { | |
d35c7a38 | 448 | struct lttng_action *action = NULL; |
7f4d5b07 | 449 | struct lttng_rate_policy *policy = NULL; |
d35c7a38 JR |
450 | enum lttng_action_status status; |
451 | ||
7f4d5b07 JR |
452 | /* Create a every N = 1 rate policy. */ |
453 | policy = lttng_rate_policy_every_n_create(1); | |
d35c7a38 JR |
454 | if (!policy) { |
455 | goto end; | |
456 | } | |
757c48a2 | 457 | |
a6bc4ca9 | 458 | action = (lttng_action *) zmalloc(sizeof(struct lttng_action_snapshot_session)); |
757c48a2 SM |
459 | if (!action) { |
460 | goto end; | |
461 | } | |
462 | ||
463 | lttng_action_init(action, LTTNG_ACTION_TYPE_SNAPSHOT_SESSION, | |
464 | lttng_action_snapshot_session_validate, | |
465 | lttng_action_snapshot_session_serialize, | |
466 | lttng_action_snapshot_session_is_equal, | |
2d57482c | 467 | lttng_action_snapshot_session_destroy, |
588c4b0d | 468 | lttng_action_snapshot_session_internal_get_rate_policy, |
6a751b95 JR |
469 | lttng_action_generic_add_error_query_results, |
470 | lttng_action_snapshot_session_mi_serialize); | |
757c48a2 | 471 | |
7f4d5b07 | 472 | status = lttng_action_snapshot_session_set_rate_policy(action, policy); |
d35c7a38 JR |
473 | if (status != LTTNG_ACTION_STATUS_OK) { |
474 | free(action); | |
475 | action = NULL; | |
476 | goto end; | |
477 | } | |
478 | ||
757c48a2 | 479 | end: |
7f4d5b07 | 480 | lttng_rate_policy_destroy(policy); |
757c48a2 SM |
481 | return action; |
482 | } | |
483 | ||
484 | enum lttng_action_status lttng_action_snapshot_session_set_session_name( | |
485 | struct lttng_action *action, const char *session_name) | |
486 | { | |
487 | struct lttng_action_snapshot_session *action_snapshot_session; | |
488 | enum lttng_action_status status; | |
489 | ||
490 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !session_name || | |
491 | strlen(session_name) == 0) { | |
492 | status = LTTNG_ACTION_STATUS_INVALID; | |
493 | goto end; | |
494 | } | |
495 | ||
496 | action_snapshot_session = action_snapshot_session_from_action(action); | |
497 | ||
498 | free(action_snapshot_session->session_name); | |
499 | ||
500 | action_snapshot_session->session_name = strdup(session_name); | |
501 | if (!action_snapshot_session->session_name) { | |
502 | status = LTTNG_ACTION_STATUS_ERROR; | |
503 | goto end; | |
504 | } | |
505 | ||
506 | status = LTTNG_ACTION_STATUS_OK; | |
507 | end: | |
508 | return status; | |
509 | } | |
510 | ||
511 | enum lttng_action_status lttng_action_snapshot_session_get_session_name( | |
512 | const struct lttng_action *action, const char **session_name) | |
513 | { | |
514 | const struct lttng_action_snapshot_session *action_snapshot_session; | |
515 | enum lttng_action_status status; | |
516 | ||
517 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !session_name) { | |
518 | status = LTTNG_ACTION_STATUS_INVALID; | |
519 | goto end; | |
520 | } | |
521 | ||
522 | action_snapshot_session = action_snapshot_session_from_action_const(action); | |
523 | ||
524 | if (action_snapshot_session->session_name) { | |
525 | *session_name = action_snapshot_session->session_name; | |
526 | status = LTTNG_ACTION_STATUS_OK; | |
527 | } else { | |
528 | status = LTTNG_ACTION_STATUS_UNSET; | |
529 | } | |
530 | ||
531 | end: | |
532 | ||
533 | return status; | |
534 | } | |
535 | ||
536 | enum lttng_action_status lttng_action_snapshot_session_set_output( | |
537 | struct lttng_action *action, | |
538 | struct lttng_snapshot_output *output) | |
539 | { | |
540 | struct lttng_action_snapshot_session *action_snapshot_session; | |
541 | enum lttng_action_status status; | |
542 | ||
543 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !output) { | |
544 | status = LTTNG_ACTION_STATUS_INVALID; | |
545 | goto end; | |
546 | } | |
547 | ||
548 | action_snapshot_session = action_snapshot_session_from_action(action); | |
549 | ||
550 | lttng_snapshot_output_destroy(action_snapshot_session->output); | |
551 | action_snapshot_session->output = output; | |
552 | ||
553 | status = LTTNG_ACTION_STATUS_OK; | |
554 | ||
555 | end: | |
556 | return status; | |
557 | } | |
558 | ||
559 | enum lttng_action_status lttng_action_snapshot_session_get_output( | |
560 | const struct lttng_action *action, | |
561 | const struct lttng_snapshot_output **output) | |
562 | { | |
563 | const struct lttng_action_snapshot_session *action_snapshot_session; | |
564 | enum lttng_action_status status; | |
565 | ||
566 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action)|| !output) { | |
567 | status = LTTNG_ACTION_STATUS_INVALID; | |
568 | goto end; | |
569 | } | |
570 | ||
571 | action_snapshot_session = action_snapshot_session_from_action_const(action); | |
572 | ||
573 | if (action_snapshot_session->output) { | |
574 | *output = action_snapshot_session->output; | |
575 | status = LTTNG_ACTION_STATUS_OK; | |
576 | } else { | |
577 | status = LTTNG_ACTION_STATUS_UNSET; | |
578 | } | |
579 | ||
580 | end: | |
581 | return status; | |
582 | } | |
d35c7a38 | 583 | |
7f4d5b07 | 584 | enum lttng_action_status lttng_action_snapshot_session_set_rate_policy( |
d35c7a38 | 585 | struct lttng_action *action, |
7f4d5b07 | 586 | const struct lttng_rate_policy *policy) |
d35c7a38 JR |
587 | { |
588 | enum lttng_action_status status; | |
589 | struct lttng_action_snapshot_session *snapshot_session_action; | |
7f4d5b07 | 590 | struct lttng_rate_policy *copy = NULL; |
d35c7a38 JR |
591 | |
592 | if (!action || !policy || !IS_SNAPSHOT_SESSION_ACTION(action)) { | |
593 | status = LTTNG_ACTION_STATUS_INVALID; | |
594 | goto end; | |
595 | } | |
596 | ||
7f4d5b07 | 597 | copy = lttng_rate_policy_copy(policy); |
d35c7a38 JR |
598 | if (!copy) { |
599 | status = LTTNG_ACTION_STATUS_ERROR; | |
600 | goto end; | |
601 | } | |
602 | ||
603 | snapshot_session_action = action_snapshot_session_from_action(action); | |
604 | ||
7f4d5b07 JR |
605 | /* Free the previous rate policy .*/ |
606 | lttng_rate_policy_destroy(snapshot_session_action->policy); | |
d35c7a38 JR |
607 | |
608 | /* Assign the policy. */ | |
609 | snapshot_session_action->policy = copy; | |
610 | status = LTTNG_ACTION_STATUS_OK; | |
611 | copy = NULL; | |
612 | ||
613 | end: | |
7f4d5b07 | 614 | lttng_rate_policy_destroy(copy); |
d35c7a38 JR |
615 | return status; |
616 | } | |
617 | ||
7f4d5b07 | 618 | enum lttng_action_status lttng_action_snapshot_session_get_rate_policy( |
d35c7a38 | 619 | const struct lttng_action *action, |
7f4d5b07 | 620 | const struct lttng_rate_policy **policy) |
d35c7a38 JR |
621 | { |
622 | enum lttng_action_status status; | |
623 | const struct lttng_action_snapshot_session *snapshot_session_action; | |
624 | ||
625 | if (!action || !policy || !IS_SNAPSHOT_SESSION_ACTION(action)) { | |
626 | status = LTTNG_ACTION_STATUS_INVALID; | |
627 | goto end; | |
628 | } | |
629 | ||
630 | snapshot_session_action = | |
631 | action_snapshot_session_from_action_const(action); | |
632 | ||
633 | *policy = snapshot_session_action->policy; | |
634 | status = LTTNG_ACTION_STATUS_OK; | |
635 | end: | |
636 | return status; | |
637 | } | |
2d57482c | 638 | |
7f4d5b07 JR |
639 | static const struct lttng_rate_policy * |
640 | lttng_action_snapshot_session_internal_get_rate_policy( | |
2d57482c JR |
641 | const struct lttng_action *action) |
642 | { | |
643 | const struct lttng_action_snapshot_session *_action; | |
644 | _action = action_snapshot_session_from_action_const(action); | |
645 | ||
646 | return _action->policy; | |
647 | } |