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 | ||
c9e313bc SM |
8 | #include <common/error.hpp> |
9 | #include <common/macros.hpp> | |
10 | #include <common/mi-lttng.hpp> | |
11 | #include <common/payload-view.hpp> | |
12 | #include <common/payload.hpp> | |
13 | #include <common/snapshot.hpp> | |
d35c7a38 | 14 | #include <inttypes.h> |
c9e313bc SM |
15 | #include <lttng/action/action-internal.hpp> |
16 | #include <lttng/action/rate-policy-internal.hpp> | |
7f4d5b07 | 17 | #include <lttng/action/rate-policy.h> |
c9e313bc | 18 | #include <lttng/action/snapshot-session-internal.hpp> |
757c48a2 | 19 | #include <lttng/action/snapshot-session.h> |
c9e313bc | 20 | #include <lttng/snapshot-internal.hpp> |
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 | 25 | |
f1494934 | 26 | namespace { |
757c48a2 SM |
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; | |
f1494934 | 58 | } /* namespace */ |
757c48a2 | 59 | |
7f4d5b07 JR |
60 | static const struct lttng_rate_policy * |
61 | lttng_action_snapshot_session_internal_get_rate_policy( | |
2d57482c JR |
62 | const struct lttng_action *action); |
63 | ||
757c48a2 SM |
64 | static struct lttng_action_snapshot_session * |
65 | action_snapshot_session_from_action(struct lttng_action *action) | |
66 | { | |
a0377dfe | 67 | LTTNG_ASSERT(action); |
757c48a2 SM |
68 | |
69 | return container_of( | |
70 | action, struct lttng_action_snapshot_session, parent); | |
71 | } | |
72 | ||
73 | static const struct lttng_action_snapshot_session * | |
74 | action_snapshot_session_from_action_const(const struct lttng_action *action) | |
75 | { | |
a0377dfe | 76 | LTTNG_ASSERT(action); |
757c48a2 SM |
77 | |
78 | return container_of( | |
79 | action, struct lttng_action_snapshot_session, parent); | |
80 | } | |
81 | ||
82 | static bool lttng_action_snapshot_session_validate(struct lttng_action *action) | |
83 | { | |
84 | bool valid = false; | |
85 | struct lttng_action_snapshot_session *action_snapshot_session; | |
86 | ||
87 | if (!action) { | |
88 | goto end; | |
89 | } | |
90 | ||
91 | action_snapshot_session = action_snapshot_session_from_action(action); | |
92 | ||
93 | /* A non-empty session name is mandatory. */ | |
94 | if (!action_snapshot_session->session_name || | |
95 | strlen(action_snapshot_session->session_name) == 0) { | |
96 | goto end; | |
97 | } | |
98 | ||
99 | if (action_snapshot_session->output && | |
100 | !lttng_snapshot_output_validate(action_snapshot_session->output)) { | |
101 | goto end; | |
102 | } | |
103 | ||
104 | valid = true; | |
105 | end: | |
106 | return valid; | |
107 | } | |
108 | ||
109 | static bool lttng_action_snapshot_session_is_equal( | |
110 | const struct lttng_action *_a, const struct lttng_action *_b) | |
111 | { | |
112 | bool is_equal = false; | |
113 | const struct lttng_action_snapshot_session *a, *b; | |
114 | ||
115 | a = action_snapshot_session_from_action_const(_a); | |
116 | b = action_snapshot_session_from_action_const(_b); | |
117 | ||
118 | /* Action is not valid if this is not true. */ | |
a0377dfe FD |
119 | LTTNG_ASSERT(a->session_name); |
120 | LTTNG_ASSERT(b->session_name); | |
757c48a2 SM |
121 | if (strcmp(a->session_name, b->session_name)) { |
122 | goto end; | |
123 | } | |
124 | ||
125 | if (a->output && b->output && | |
126 | !lttng_snapshot_output_is_equal(a->output, b->output)) { | |
127 | goto end; | |
128 | } else if (!!a->output != !!b->output) { | |
129 | goto end; | |
130 | } | |
131 | ||
7f4d5b07 | 132 | is_equal = lttng_rate_policy_is_equal(a->policy, b->policy); |
757c48a2 SM |
133 | end: |
134 | return is_equal; | |
135 | } | |
136 | ||
0c51e8f3 | 137 | static size_t serialize_strlen(const char *str) |
757c48a2 | 138 | { |
0c51e8f3 | 139 | return str ? strlen(str) + 1 : 0; |
757c48a2 SM |
140 | } |
141 | ||
142 | static int lttng_action_snapshot_session_serialize( | |
143 | struct lttng_action *action, struct lttng_payload *payload) | |
144 | { | |
145 | struct lttng_action_snapshot_session *action_snapshot_session; | |
146 | struct lttng_action_snapshot_session_comm comm = {}; | |
147 | int ret; | |
148 | size_t size_before_comm; | |
149 | ||
a0377dfe FD |
150 | LTTNG_ASSERT(action); |
151 | LTTNG_ASSERT(payload); | |
757c48a2 SM |
152 | |
153 | size_before_comm = payload->buffer.size; | |
757c48a2 SM |
154 | |
155 | action_snapshot_session = action_snapshot_session_from_action(action); | |
156 | comm.session_name_len = | |
157 | serialize_strlen(action_snapshot_session->session_name); | |
158 | ||
159 | /* Add header. */ | |
160 | ret = lttng_dynamic_buffer_append( | |
161 | &payload->buffer, &comm, sizeof(comm)); | |
162 | if (ret) { | |
163 | goto end; | |
164 | } | |
165 | ||
a0377dfe | 166 | LTTNG_ASSERT(action_snapshot_session->session_name); |
757c48a2 SM |
167 | DBG("Serializing snapshot session action: session-name: %s", |
168 | action_snapshot_session->session_name); | |
169 | ||
170 | /* Add session name. */ | |
171 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
172 | action_snapshot_session->session_name, | |
173 | comm.session_name_len); | |
174 | if (ret) { | |
175 | goto end; | |
176 | } | |
177 | ||
178 | /* Serialize the snapshot output object, if any. */ | |
179 | if (action_snapshot_session->output) { | |
180 | const size_t size_before_output = payload->buffer.size; | |
181 | struct lttng_action_snapshot_session_comm *comm_in_payload; | |
182 | ||
183 | ret = lttng_snapshot_output_serialize( | |
184 | action_snapshot_session->output, | |
185 | payload); | |
186 | if (ret) { | |
187 | goto end; | |
188 | } | |
189 | ||
757c48a2 SM |
190 | comm_in_payload = (typeof(comm_in_payload))( |
191 | payload->buffer.data + size_before_comm); | |
d35c7a38 | 192 | /* Adjust action length in header. */ |
757c48a2 SM |
193 | comm_in_payload->snapshot_output_len = |
194 | payload->buffer.size - size_before_output; | |
195 | } | |
196 | ||
7f4d5b07 | 197 | /* Serialize the rate policy. */ |
d35c7a38 JR |
198 | { |
199 | const size_t size_before_output = payload->buffer.size; | |
200 | struct lttng_action_snapshot_session_comm *comm_in_payload; | |
201 | ||
7f4d5b07 | 202 | ret = lttng_rate_policy_serialize( |
d35c7a38 JR |
203 | action_snapshot_session->policy, payload); |
204 | if (ret) { | |
205 | ret = -1; | |
206 | goto end; | |
207 | } | |
208 | ||
209 | comm_in_payload = (typeof(comm_in_payload))( | |
210 | payload->buffer.data + size_before_comm); | |
7f4d5b07 JR |
211 | /* Adjust rate policy length in header. */ |
212 | comm_in_payload->rate_policy_len = | |
d35c7a38 JR |
213 | payload->buffer.size - size_before_output; |
214 | } | |
215 | ||
757c48a2 SM |
216 | end: |
217 | return ret; | |
218 | } | |
219 | ||
220 | static void lttng_action_snapshot_session_destroy(struct lttng_action *action) | |
221 | { | |
222 | struct lttng_action_snapshot_session *action_snapshot_session; | |
223 | ||
224 | if (!action) { | |
225 | goto end; | |
226 | } | |
227 | ||
228 | action_snapshot_session = action_snapshot_session_from_action(action); | |
229 | ||
230 | free(action_snapshot_session->session_name); | |
231 | lttng_snapshot_output_destroy(action_snapshot_session->output); | |
7f4d5b07 | 232 | lttng_rate_policy_destroy(action_snapshot_session->policy); |
757c48a2 SM |
233 | free(action_snapshot_session); |
234 | ||
235 | end: | |
236 | return; | |
237 | } | |
238 | ||
239 | ssize_t lttng_action_snapshot_session_create_from_payload( | |
240 | struct lttng_payload_view *view, | |
241 | struct lttng_action **p_action) | |
242 | { | |
243 | ssize_t consumed_len; | |
757c48a2 SM |
244 | const char *variable_data; |
245 | struct lttng_action *action; | |
246 | enum lttng_action_status status; | |
247 | struct lttng_snapshot_output *snapshot_output = NULL; | |
7f4d5b07 | 248 | struct lttng_rate_policy *policy = NULL; |
3e6e0df2 JG |
249 | const struct lttng_action_snapshot_session_comm *comm; |
250 | const struct lttng_payload_view snapshot_session_comm_view = | |
251 | lttng_payload_view_from_view( | |
252 | view, 0, sizeof(*comm)); | |
757c48a2 SM |
253 | |
254 | action = lttng_action_snapshot_session_create(); | |
255 | if (!action) { | |
256 | goto error; | |
257 | } | |
258 | ||
3e6e0df2 JG |
259 | if (!lttng_payload_view_is_valid(&snapshot_session_comm_view)) { |
260 | /* Payload not large enough to contain the header. */ | |
261 | goto error; | |
262 | } | |
263 | ||
264 | comm = (typeof(comm)) snapshot_session_comm_view.buffer.data; | |
757c48a2 SM |
265 | variable_data = (const char *) &comm->data; |
266 | ||
267 | consumed_len = sizeof(struct lttng_action_snapshot_session_comm); | |
268 | ||
269 | if (!lttng_buffer_view_contains_string( | |
270 | &view->buffer, variable_data, comm->session_name_len)) { | |
271 | goto error; | |
272 | } | |
273 | ||
274 | status = lttng_action_snapshot_session_set_session_name( | |
275 | action, variable_data); | |
276 | if (status != LTTNG_ACTION_STATUS_OK) { | |
277 | goto error; | |
278 | } | |
279 | ||
280 | variable_data += comm->session_name_len; | |
281 | consumed_len += comm->session_name_len; | |
282 | ||
283 | /* If there is a snapshot output object, deserialize it. */ | |
284 | if (comm->snapshot_output_len > 0) { | |
285 | ssize_t snapshot_output_consumed_len; | |
286 | enum lttng_action_status action_status; | |
287 | struct lttng_payload_view snapshot_output_buffer_view = | |
288 | lttng_payload_view_from_view(view, consumed_len, | |
289 | comm->snapshot_output_len); | |
290 | ||
3e6e0df2 | 291 | if (!lttng_payload_view_is_valid(&snapshot_output_buffer_view)) { |
0c51e8f3 | 292 | ERR("Failed to create buffer view for snapshot output."); |
757c48a2 SM |
293 | goto error; |
294 | } | |
295 | ||
296 | snapshot_output_consumed_len = | |
297 | lttng_snapshot_output_create_from_payload( | |
298 | &snapshot_output_buffer_view, | |
299 | &snapshot_output); | |
300 | if (snapshot_output_consumed_len != comm->snapshot_output_len) { | |
0c51e8f3 | 301 | ERR("Failed to deserialize snapshot output object: " |
757c48a2 SM |
302 | "consumed-len: %zd, expected-len: %" PRIu32, |
303 | snapshot_output_consumed_len, | |
304 | comm->snapshot_output_len); | |
305 | goto error; | |
306 | } | |
307 | ||
308 | action_status = lttng_action_snapshot_session_set_output( | |
309 | action, snapshot_output); | |
310 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
311 | goto error; | |
312 | } | |
313 | ||
314 | /* Ownership has been transferred to the action. */ | |
315 | snapshot_output = NULL; | |
316 | } | |
317 | ||
318 | variable_data += comm->snapshot_output_len; | |
319 | consumed_len += comm->snapshot_output_len; | |
d35c7a38 | 320 | |
7f4d5b07 JR |
321 | /* Rate policy. */ |
322 | if (comm->rate_policy_len <= 0) { | |
323 | ERR("Rate policy should be present."); | |
d35c7a38 JR |
324 | goto error; |
325 | } | |
326 | { | |
7f4d5b07 | 327 | ssize_t rate_policy_consumed_len; |
d35c7a38 JR |
328 | struct lttng_payload_view policy_view = |
329 | lttng_payload_view_from_view(view, consumed_len, | |
7f4d5b07 | 330 | comm->rate_policy_len); |
d35c7a38 JR |
331 | |
332 | if (!lttng_payload_view_is_valid(&policy_view)) { | |
7f4d5b07 | 333 | ERR("Failed to create buffer view for rate policy."); |
d35c7a38 JR |
334 | goto error; |
335 | } | |
336 | ||
7f4d5b07 JR |
337 | rate_policy_consumed_len = |
338 | lttng_rate_policy_create_from_payload( | |
d35c7a38 | 339 | &policy_view, &policy); |
7f4d5b07 | 340 | if (rate_policy_consumed_len < 0) { |
d35c7a38 JR |
341 | goto error; |
342 | } | |
343 | ||
7f4d5b07 JR |
344 | if (rate_policy_consumed_len != comm->rate_policy_len) { |
345 | ERR("Failed to deserialize rate policy object: " | |
d35c7a38 | 346 | "consumed-len: %zd, expected-len: %" PRIu32, |
7f4d5b07 JR |
347 | rate_policy_consumed_len, |
348 | comm->rate_policy_len); | |
d35c7a38 JR |
349 | goto error; |
350 | } | |
351 | ||
7f4d5b07 | 352 | status = lttng_action_snapshot_session_set_rate_policy( |
d35c7a38 JR |
353 | action, policy); |
354 | if (status != LTTNG_ACTION_STATUS_OK) { | |
355 | goto error; | |
356 | } | |
357 | } | |
358 | ||
7f4d5b07 JR |
359 | variable_data += comm->rate_policy_len; |
360 | consumed_len += comm->rate_policy_len; | |
d35c7a38 | 361 | |
757c48a2 SM |
362 | *p_action = action; |
363 | action = NULL; | |
364 | ||
365 | goto end; | |
366 | ||
367 | error: | |
368 | consumed_len = -1; | |
369 | ||
370 | end: | |
7f4d5b07 | 371 | lttng_rate_policy_destroy(policy); |
757c48a2 SM |
372 | lttng_action_snapshot_session_destroy(action); |
373 | lttng_snapshot_output_destroy(snapshot_output); | |
374 | ||
375 | return consumed_len; | |
376 | } | |
377 | ||
6a751b95 JR |
378 | static enum lttng_error_code lttng_action_snapshot_session_mi_serialize( |
379 | const struct lttng_action *action, struct mi_writer *writer) | |
380 | { | |
381 | int ret; | |
382 | enum lttng_error_code ret_code; | |
383 | enum lttng_action_status status; | |
384 | const char *session_name = NULL; | |
385 | const struct lttng_snapshot_output *output = NULL; | |
386 | const struct lttng_rate_policy *policy = NULL; | |
387 | ||
a0377dfe FD |
388 | LTTNG_ASSERT(action); |
389 | LTTNG_ASSERT(IS_SNAPSHOT_SESSION_ACTION(action)); | |
6a751b95 JR |
390 | |
391 | status = lttng_action_snapshot_session_get_session_name( | |
392 | action, &session_name); | |
a0377dfe FD |
393 | LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK); |
394 | LTTNG_ASSERT(session_name != NULL); | |
6a751b95 JR |
395 | |
396 | status = lttng_action_snapshot_session_get_rate_policy(action, &policy); | |
a0377dfe FD |
397 | LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK); |
398 | LTTNG_ASSERT(policy != NULL); | |
6a751b95 JR |
399 | |
400 | /* Open action snapshot session element. */ | |
401 | ret = mi_lttng_writer_open_element( | |
402 | writer, mi_lttng_element_action_snapshot_session); | |
403 | if (ret) { | |
404 | goto mi_error; | |
405 | } | |
406 | ||
407 | /* Session name. */ | |
408 | ret = mi_lttng_writer_write_element_string( | |
409 | writer, mi_lttng_element_session_name, session_name); | |
410 | if (ret) { | |
411 | goto mi_error; | |
412 | } | |
413 | ||
414 | /* Output if any. */ | |
415 | status = lttng_action_snapshot_session_get_output(action, &output); | |
416 | if (status == LTTNG_ACTION_STATUS_OK) { | |
a0377dfe | 417 | LTTNG_ASSERT(output != NULL); |
6a751b95 JR |
418 | ret_code = lttng_snapshot_output_mi_serialize(output, writer); |
419 | if (ret_code != LTTNG_OK) { | |
420 | goto end; | |
421 | } | |
422 | } else if (status != LTTNG_ACTION_STATUS_UNSET) { | |
423 | /* This should not happen at this point. */ | |
424 | abort(); | |
425 | } | |
426 | ||
427 | /* Rate policy. */ | |
428 | ret_code = lttng_rate_policy_mi_serialize(policy, writer); | |
429 | if (ret_code != LTTNG_OK) { | |
430 | goto end; | |
431 | } | |
432 | ||
433 | /* Close action_snapshot_session element. */ | |
434 | ret = mi_lttng_writer_close_element(writer); | |
435 | if (ret) { | |
436 | goto mi_error; | |
437 | } | |
438 | ||
439 | ret_code = LTTNG_OK; | |
440 | goto end; | |
441 | ||
442 | mi_error: | |
443 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
444 | end: | |
445 | return ret_code; | |
446 | } | |
447 | ||
757c48a2 SM |
448 | struct lttng_action *lttng_action_snapshot_session_create(void) |
449 | { | |
64803277 | 450 | struct lttng_action_snapshot_session *action_snapshot = NULL; |
7f4d5b07 | 451 | struct lttng_rate_policy *policy = NULL; |
d35c7a38 JR |
452 | enum lttng_action_status status; |
453 | ||
7f4d5b07 JR |
454 | /* Create a every N = 1 rate policy. */ |
455 | policy = lttng_rate_policy_every_n_create(1); | |
d35c7a38 JR |
456 | if (!policy) { |
457 | goto end; | |
458 | } | |
757c48a2 | 459 | |
64803277 SM |
460 | action_snapshot = zmalloc<lttng_action_snapshot_session>(); |
461 | if (!action_snapshot) { | |
757c48a2 SM |
462 | goto end; |
463 | } | |
464 | ||
64803277 SM |
465 | lttng_action_init(&action_snapshot->parent, |
466 | LTTNG_ACTION_TYPE_SNAPSHOT_SESSION, | |
757c48a2 SM |
467 | lttng_action_snapshot_session_validate, |
468 | lttng_action_snapshot_session_serialize, | |
469 | lttng_action_snapshot_session_is_equal, | |
2d57482c | 470 | lttng_action_snapshot_session_destroy, |
588c4b0d | 471 | lttng_action_snapshot_session_internal_get_rate_policy, |
6a751b95 JR |
472 | lttng_action_generic_add_error_query_results, |
473 | lttng_action_snapshot_session_mi_serialize); | |
757c48a2 | 474 | |
64803277 SM |
475 | status = lttng_action_snapshot_session_set_rate_policy( |
476 | &action_snapshot->parent, policy); | |
d35c7a38 | 477 | if (status != LTTNG_ACTION_STATUS_OK) { |
64803277 SM |
478 | lttng_action_destroy(&action_snapshot->parent); |
479 | action_snapshot = NULL; | |
d35c7a38 JR |
480 | goto end; |
481 | } | |
482 | ||
757c48a2 | 483 | end: |
7f4d5b07 | 484 | lttng_rate_policy_destroy(policy); |
64803277 | 485 | return action_snapshot ? &action_snapshot->parent : nullptr; |
757c48a2 SM |
486 | } |
487 | ||
488 | enum lttng_action_status lttng_action_snapshot_session_set_session_name( | |
489 | struct lttng_action *action, const char *session_name) | |
490 | { | |
491 | struct lttng_action_snapshot_session *action_snapshot_session; | |
492 | enum lttng_action_status status; | |
493 | ||
494 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !session_name || | |
495 | strlen(session_name) == 0) { | |
496 | status = LTTNG_ACTION_STATUS_INVALID; | |
497 | goto end; | |
498 | } | |
499 | ||
500 | action_snapshot_session = action_snapshot_session_from_action(action); | |
501 | ||
502 | free(action_snapshot_session->session_name); | |
503 | ||
504 | action_snapshot_session->session_name = strdup(session_name); | |
505 | if (!action_snapshot_session->session_name) { | |
506 | status = LTTNG_ACTION_STATUS_ERROR; | |
507 | goto end; | |
508 | } | |
509 | ||
510 | status = LTTNG_ACTION_STATUS_OK; | |
511 | end: | |
512 | return status; | |
513 | } | |
514 | ||
515 | enum lttng_action_status lttng_action_snapshot_session_get_session_name( | |
516 | const struct lttng_action *action, const char **session_name) | |
517 | { | |
518 | const struct lttng_action_snapshot_session *action_snapshot_session; | |
519 | enum lttng_action_status status; | |
520 | ||
521 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !session_name) { | |
522 | status = LTTNG_ACTION_STATUS_INVALID; | |
523 | goto end; | |
524 | } | |
525 | ||
526 | action_snapshot_session = action_snapshot_session_from_action_const(action); | |
527 | ||
528 | if (action_snapshot_session->session_name) { | |
529 | *session_name = action_snapshot_session->session_name; | |
530 | status = LTTNG_ACTION_STATUS_OK; | |
531 | } else { | |
532 | status = LTTNG_ACTION_STATUS_UNSET; | |
533 | } | |
534 | ||
535 | end: | |
536 | ||
537 | return status; | |
538 | } | |
539 | ||
540 | enum lttng_action_status lttng_action_snapshot_session_set_output( | |
541 | struct lttng_action *action, | |
542 | struct lttng_snapshot_output *output) | |
543 | { | |
544 | struct lttng_action_snapshot_session *action_snapshot_session; | |
545 | enum lttng_action_status status; | |
546 | ||
547 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action) || !output) { | |
548 | status = LTTNG_ACTION_STATUS_INVALID; | |
549 | goto end; | |
550 | } | |
551 | ||
552 | action_snapshot_session = action_snapshot_session_from_action(action); | |
553 | ||
554 | lttng_snapshot_output_destroy(action_snapshot_session->output); | |
555 | action_snapshot_session->output = output; | |
556 | ||
557 | status = LTTNG_ACTION_STATUS_OK; | |
558 | ||
559 | end: | |
560 | return status; | |
561 | } | |
562 | ||
563 | enum lttng_action_status lttng_action_snapshot_session_get_output( | |
564 | const struct lttng_action *action, | |
565 | const struct lttng_snapshot_output **output) | |
566 | { | |
567 | const struct lttng_action_snapshot_session *action_snapshot_session; | |
568 | enum lttng_action_status status; | |
569 | ||
570 | if (!action || !IS_SNAPSHOT_SESSION_ACTION(action)|| !output) { | |
571 | status = LTTNG_ACTION_STATUS_INVALID; | |
572 | goto end; | |
573 | } | |
574 | ||
575 | action_snapshot_session = action_snapshot_session_from_action_const(action); | |
576 | ||
577 | if (action_snapshot_session->output) { | |
578 | *output = action_snapshot_session->output; | |
579 | status = LTTNG_ACTION_STATUS_OK; | |
580 | } else { | |
581 | status = LTTNG_ACTION_STATUS_UNSET; | |
582 | } | |
583 | ||
584 | end: | |
585 | return status; | |
586 | } | |
d35c7a38 | 587 | |
7f4d5b07 | 588 | enum lttng_action_status lttng_action_snapshot_session_set_rate_policy( |
d35c7a38 | 589 | struct lttng_action *action, |
7f4d5b07 | 590 | const struct lttng_rate_policy *policy) |
d35c7a38 JR |
591 | { |
592 | enum lttng_action_status status; | |
593 | struct lttng_action_snapshot_session *snapshot_session_action; | |
7f4d5b07 | 594 | struct lttng_rate_policy *copy = NULL; |
d35c7a38 JR |
595 | |
596 | if (!action || !policy || !IS_SNAPSHOT_SESSION_ACTION(action)) { | |
597 | status = LTTNG_ACTION_STATUS_INVALID; | |
598 | goto end; | |
599 | } | |
600 | ||
7f4d5b07 | 601 | copy = lttng_rate_policy_copy(policy); |
d35c7a38 JR |
602 | if (!copy) { |
603 | status = LTTNG_ACTION_STATUS_ERROR; | |
604 | goto end; | |
605 | } | |
606 | ||
607 | snapshot_session_action = action_snapshot_session_from_action(action); | |
608 | ||
7f4d5b07 JR |
609 | /* Free the previous rate policy .*/ |
610 | lttng_rate_policy_destroy(snapshot_session_action->policy); | |
d35c7a38 JR |
611 | |
612 | /* Assign the policy. */ | |
613 | snapshot_session_action->policy = copy; | |
614 | status = LTTNG_ACTION_STATUS_OK; | |
615 | copy = NULL; | |
616 | ||
617 | end: | |
7f4d5b07 | 618 | lttng_rate_policy_destroy(copy); |
d35c7a38 JR |
619 | return status; |
620 | } | |
621 | ||
7f4d5b07 | 622 | enum lttng_action_status lttng_action_snapshot_session_get_rate_policy( |
d35c7a38 | 623 | const struct lttng_action *action, |
7f4d5b07 | 624 | const struct lttng_rate_policy **policy) |
d35c7a38 JR |
625 | { |
626 | enum lttng_action_status status; | |
627 | const struct lttng_action_snapshot_session *snapshot_session_action; | |
628 | ||
629 | if (!action || !policy || !IS_SNAPSHOT_SESSION_ACTION(action)) { | |
630 | status = LTTNG_ACTION_STATUS_INVALID; | |
631 | goto end; | |
632 | } | |
633 | ||
634 | snapshot_session_action = | |
635 | action_snapshot_session_from_action_const(action); | |
636 | ||
637 | *policy = snapshot_session_action->policy; | |
638 | status = LTTNG_ACTION_STATUS_OK; | |
639 | end: | |
640 | return status; | |
641 | } | |
2d57482c | 642 | |
7f4d5b07 JR |
643 | static const struct lttng_rate_policy * |
644 | lttng_action_snapshot_session_internal_get_rate_policy( | |
2d57482c JR |
645 | const struct lttng_action *action) |
646 | { | |
647 | const struct lttng_action_snapshot_session *_action; | |
648 | _action = action_snapshot_session_from_action_const(action); | |
649 | ||
650 | return _action->policy; | |
651 | } |