Commit | Line | Data |
---|---|---|
931bdbaa 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 <lttng/action/action-internal.hpp> | |
12 | #include <lttng/action/rate-policy-internal.hpp> | |
7f4d5b07 | 13 | #include <lttng/action/rate-policy.h> |
c9e313bc | 14 | #include <lttng/action/stop-session-internal.hpp> |
931bdbaa SM |
15 | #include <lttng/action/stop-session.h> |
16 | ||
17 | #define IS_STOP_SESSION_ACTION(action) \ | |
17182cfd | 18 | (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_STOP_SESSION) |
931bdbaa | 19 | |
f1494934 | 20 | namespace { |
931bdbaa SM |
21 | struct lttng_action_stop_session { |
22 | struct lttng_action parent; | |
23 | ||
24 | /* Owned by this. */ | |
25 | char *session_name; | |
7f4d5b07 | 26 | struct lttng_rate_policy *policy; |
931bdbaa SM |
27 | }; |
28 | ||
29 | struct lttng_action_stop_session_comm { | |
30 | /* Includes the trailing \0. */ | |
31 | uint32_t session_name_len; | |
32 | ||
33 | /* | |
34 | * Variable data: | |
35 | * | |
36 | * - session name (null terminated) | |
a5ec75db | 37 | * - policy |
931bdbaa SM |
38 | */ |
39 | char data[]; | |
40 | } LTTNG_PACKED; | |
f1494934 | 41 | } /* namespace */ |
931bdbaa | 42 | |
7f4d5b07 JR |
43 | static const struct lttng_rate_policy * |
44 | lttng_action_stop_session_internal_get_rate_policy( | |
2d57482c JR |
45 | const struct lttng_action *action); |
46 | ||
931bdbaa SM |
47 | static struct lttng_action_stop_session *action_stop_session_from_action( |
48 | struct lttng_action *action) | |
49 | { | |
a0377dfe | 50 | LTTNG_ASSERT(action); |
931bdbaa | 51 | |
0114db0e | 52 | return lttng::utils::container_of(action, <tng_action_stop_session::parent); |
931bdbaa SM |
53 | } |
54 | ||
55 | static const struct lttng_action_stop_session * | |
56 | action_stop_session_from_action_const(const struct lttng_action *action) | |
57 | { | |
a0377dfe | 58 | LTTNG_ASSERT(action); |
931bdbaa | 59 | |
0114db0e | 60 | return lttng::utils::container_of(action, <tng_action_stop_session::parent); |
931bdbaa SM |
61 | } |
62 | ||
63 | static bool lttng_action_stop_session_validate(struct lttng_action *action) | |
64 | { | |
65 | bool valid; | |
66 | struct lttng_action_stop_session *action_stop_session; | |
67 | ||
68 | if (!action) { | |
69 | valid = false; | |
70 | goto end; | |
71 | } | |
72 | ||
73 | action_stop_session = action_stop_session_from_action(action); | |
74 | ||
75 | /* A non-empty session name is mandatory. */ | |
76 | if (!action_stop_session->session_name || | |
77 | strlen(action_stop_session->session_name) == 0) { | |
78 | valid = false; | |
79 | goto end; | |
80 | } | |
81 | ||
82 | valid = true; | |
83 | end: | |
84 | return valid; | |
85 | } | |
86 | ||
87 | static bool lttng_action_stop_session_is_equal( | |
88 | const struct lttng_action *_a, const struct lttng_action *_b) | |
89 | { | |
90 | bool is_equal = false; | |
91 | const struct lttng_action_stop_session *a, *b; | |
92 | ||
93 | a = action_stop_session_from_action_const(_a); | |
94 | b = action_stop_session_from_action_const(_b); | |
95 | ||
96 | /* Action is not valid if this is not true. */ | |
a0377dfe FD |
97 | LTTNG_ASSERT(a->session_name); |
98 | LTTNG_ASSERT(b->session_name); | |
931bdbaa SM |
99 | if (strcmp(a->session_name, b->session_name)) { |
100 | goto end; | |
101 | } | |
102 | ||
7f4d5b07 | 103 | is_equal = lttng_rate_policy_is_equal(a->policy, b->policy); |
931bdbaa SM |
104 | end: |
105 | return is_equal; | |
106 | } | |
107 | ||
108 | static int lttng_action_stop_session_serialize( | |
c0a66c84 | 109 | struct lttng_action *action, struct lttng_payload *payload) |
931bdbaa SM |
110 | { |
111 | struct lttng_action_stop_session *action_stop_session; | |
112 | struct lttng_action_stop_session_comm comm; | |
113 | size_t session_name_len; | |
114 | int ret; | |
115 | ||
a0377dfe FD |
116 | LTTNG_ASSERT(action); |
117 | LTTNG_ASSERT(payload); | |
931bdbaa SM |
118 | |
119 | action_stop_session = action_stop_session_from_action(action); | |
120 | ||
a0377dfe | 121 | LTTNG_ASSERT(action_stop_session->session_name); |
931bdbaa SM |
122 | |
123 | DBG("Serializing stop session action: session-name: %s", | |
124 | action_stop_session->session_name); | |
125 | ||
126 | session_name_len = strlen(action_stop_session->session_name) + 1; | |
127 | comm.session_name_len = session_name_len; | |
128 | ||
c0a66c84 JG |
129 | ret = lttng_dynamic_buffer_append( |
130 | &payload->buffer, &comm, sizeof(comm)); | |
931bdbaa SM |
131 | if (ret) { |
132 | ret = -1; | |
133 | goto end; | |
134 | } | |
135 | ||
c0a66c84 | 136 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
931bdbaa SM |
137 | action_stop_session->session_name, session_name_len); |
138 | if (ret) { | |
139 | ret = -1; | |
140 | goto end; | |
141 | } | |
142 | ||
7f4d5b07 | 143 | ret = lttng_rate_policy_serialize(action_stop_session->policy, payload); |
a5ec75db JR |
144 | if (ret) { |
145 | ret = -1; | |
146 | goto end; | |
147 | } | |
148 | ||
931bdbaa SM |
149 | ret = 0; |
150 | end: | |
151 | return ret; | |
152 | } | |
153 | ||
154 | static void lttng_action_stop_session_destroy(struct lttng_action *action) | |
155 | { | |
156 | struct lttng_action_stop_session *action_stop_session; | |
157 | ||
158 | if (!action) { | |
159 | goto end; | |
160 | } | |
161 | ||
162 | action_stop_session = action_stop_session_from_action(action); | |
163 | ||
7f4d5b07 | 164 | lttng_rate_policy_destroy(action_stop_session->policy); |
931bdbaa SM |
165 | free(action_stop_session->session_name); |
166 | free(action_stop_session); | |
167 | ||
168 | end: | |
169 | return; | |
170 | } | |
171 | ||
c0a66c84 JG |
172 | ssize_t lttng_action_stop_session_create_from_payload( |
173 | struct lttng_payload_view *view, | |
931bdbaa SM |
174 | struct lttng_action **p_action) |
175 | { | |
a5ec75db | 176 | ssize_t consumed_len, ret; |
931bdbaa SM |
177 | const struct lttng_action_stop_session_comm *comm; |
178 | const char *session_name; | |
a5ec75db | 179 | struct lttng_action *action = NULL; |
931bdbaa | 180 | enum lttng_action_status status; |
7f4d5b07 | 181 | struct lttng_rate_policy *policy = NULL; |
931bdbaa | 182 | |
c0a66c84 | 183 | comm = (typeof(comm)) view->buffer.data; |
931bdbaa SM |
184 | session_name = (const char *) &comm->data; |
185 | ||
a5ec75db | 186 | /* Session name. */ |
931bdbaa | 187 | if (!lttng_buffer_view_contains_string( |
c0a66c84 | 188 | &view->buffer, session_name, comm->session_name_len)) { |
931bdbaa SM |
189 | consumed_len = -1; |
190 | goto end; | |
191 | } | |
a5ec75db JR |
192 | consumed_len = sizeof(*comm) + comm->session_name_len; |
193 | ||
7f4d5b07 | 194 | /* Rate policy. */ |
a5ec75db JR |
195 | { |
196 | struct lttng_payload_view policy_view = | |
197 | lttng_payload_view_from_view( | |
198 | view, consumed_len, -1); | |
7f4d5b07 | 199 | ret = lttng_rate_policy_create_from_payload( |
a5ec75db JR |
200 | &policy_view, &policy); |
201 | if (ret < 0) { | |
202 | consumed_len = -1; | |
203 | goto end; | |
204 | } | |
205 | consumed_len += ret; | |
206 | } | |
207 | ||
208 | action = lttng_action_stop_session_create(); | |
209 | if (!action) { | |
210 | consumed_len = -1; | |
211 | goto end; | |
212 | } | |
931bdbaa SM |
213 | |
214 | status = lttng_action_stop_session_set_session_name( | |
215 | action, session_name); | |
216 | if (status != LTTNG_ACTION_STATUS_OK) { | |
217 | consumed_len = -1; | |
218 | goto end; | |
219 | } | |
220 | ||
a0377dfe | 221 | LTTNG_ASSERT(policy); |
7f4d5b07 | 222 | status = lttng_action_stop_session_set_rate_policy(action, policy); |
a5ec75db JR |
223 | if (status != LTTNG_ACTION_STATUS_OK) { |
224 | consumed_len = -1; | |
225 | goto end; | |
226 | } | |
227 | ||
931bdbaa SM |
228 | *p_action = action; |
229 | action = NULL; | |
230 | ||
231 | end: | |
7f4d5b07 | 232 | lttng_rate_policy_destroy(policy); |
931bdbaa SM |
233 | lttng_action_stop_session_destroy(action); |
234 | ||
235 | return consumed_len; | |
236 | } | |
237 | ||
6a751b95 JR |
238 | static enum lttng_error_code lttng_action_stop_session_mi_serialize( |
239 | const struct lttng_action *action, struct mi_writer *writer) | |
240 | { | |
241 | int ret; | |
242 | enum lttng_error_code ret_code; | |
243 | enum lttng_action_status status; | |
244 | const char *session_name = NULL; | |
245 | const struct lttng_rate_policy *policy = NULL; | |
246 | ||
a0377dfe FD |
247 | LTTNG_ASSERT(action); |
248 | LTTNG_ASSERT(IS_STOP_SESSION_ACTION(action)); | |
6a751b95 JR |
249 | |
250 | status = lttng_action_stop_session_get_session_name( | |
251 | action, &session_name); | |
a0377dfe FD |
252 | LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK); |
253 | LTTNG_ASSERT(session_name != NULL); | |
6a751b95 JR |
254 | |
255 | status = lttng_action_stop_session_get_rate_policy(action, &policy); | |
a0377dfe FD |
256 | LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK); |
257 | LTTNG_ASSERT(policy != NULL); | |
6a751b95 JR |
258 | |
259 | /* Open action stop session. */ | |
260 | ret = mi_lttng_writer_open_element( | |
261 | writer, mi_lttng_element_action_start_session); | |
262 | if (ret) { | |
263 | goto mi_error; | |
264 | } | |
265 | ||
266 | /* Session name. */ | |
267 | ret = mi_lttng_writer_write_element_string( | |
268 | writer, mi_lttng_element_session_name, session_name); | |
269 | if (ret) { | |
270 | goto mi_error; | |
271 | } | |
272 | ||
273 | /* Rate policy. */ | |
274 | ret_code = lttng_rate_policy_mi_serialize(policy, writer); | |
275 | if (ret_code != LTTNG_OK) { | |
276 | goto end; | |
277 | } | |
278 | ||
279 | /* Close action stop session element. */ | |
280 | ret = mi_lttng_writer_close_element(writer); | |
281 | if (ret) { | |
282 | goto mi_error; | |
283 | } | |
284 | ||
285 | ret_code = LTTNG_OK; | |
286 | goto end; | |
287 | ||
288 | mi_error: | |
289 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
290 | end: | |
291 | return ret_code; | |
292 | } | |
293 | ||
931bdbaa SM |
294 | struct lttng_action *lttng_action_stop_session_create(void) |
295 | { | |
64803277 | 296 | struct lttng_action_stop_session *action_stop = NULL; |
7f4d5b07 | 297 | struct lttng_rate_policy *policy = NULL; |
a5ec75db JR |
298 | enum lttng_action_status status; |
299 | ||
7f4d5b07 JR |
300 | /* Create a every N = 1 rate policy. */ |
301 | policy = lttng_rate_policy_every_n_create(1); | |
a5ec75db JR |
302 | if (!policy) { |
303 | goto end; | |
304 | } | |
931bdbaa | 305 | |
64803277 SM |
306 | action_stop = zmalloc<lttng_action_stop_session>(); |
307 | if (!action_stop) { | |
931bdbaa SM |
308 | goto end; |
309 | } | |
310 | ||
64803277 | 311 | lttng_action_init(&action_stop->parent, LTTNG_ACTION_TYPE_STOP_SESSION, |
931bdbaa SM |
312 | lttng_action_stop_session_validate, |
313 | lttng_action_stop_session_serialize, | |
314 | lttng_action_stop_session_is_equal, | |
2d57482c | 315 | lttng_action_stop_session_destroy, |
588c4b0d | 316 | lttng_action_stop_session_internal_get_rate_policy, |
6a751b95 JR |
317 | lttng_action_generic_add_error_query_results, |
318 | lttng_action_stop_session_mi_serialize); | |
931bdbaa | 319 | |
64803277 SM |
320 | status = lttng_action_stop_session_set_rate_policy( |
321 | &action_stop->parent, policy); | |
a5ec75db | 322 | if (status != LTTNG_ACTION_STATUS_OK) { |
64803277 SM |
323 | lttng_action_destroy(&action_stop->parent); |
324 | action_stop = NULL; | |
a5ec75db JR |
325 | goto end; |
326 | } | |
327 | ||
931bdbaa | 328 | end: |
7f4d5b07 | 329 | lttng_rate_policy_destroy(policy); |
64803277 | 330 | return &action_stop->parent; |
931bdbaa SM |
331 | } |
332 | ||
333 | enum lttng_action_status lttng_action_stop_session_set_session_name( | |
334 | struct lttng_action *action, const char *session_name) | |
335 | { | |
336 | struct lttng_action_stop_session *action_stop_session; | |
337 | enum lttng_action_status status; | |
338 | ||
339 | if (!action || !IS_STOP_SESSION_ACTION(action) || !session_name || | |
340 | strlen(session_name) == 0) { | |
341 | status = LTTNG_ACTION_STATUS_INVALID; | |
342 | goto end; | |
343 | } | |
344 | ||
345 | action_stop_session = action_stop_session_from_action(action); | |
346 | ||
347 | free(action_stop_session->session_name); | |
348 | ||
349 | action_stop_session->session_name = strdup(session_name); | |
350 | if (!action_stop_session->session_name) { | |
351 | status = LTTNG_ACTION_STATUS_ERROR; | |
352 | goto end; | |
353 | } | |
354 | ||
355 | status = LTTNG_ACTION_STATUS_OK; | |
356 | end: | |
357 | return status; | |
358 | } | |
359 | ||
360 | enum lttng_action_status lttng_action_stop_session_get_session_name( | |
361 | const struct lttng_action *action, const char **session_name) | |
362 | { | |
363 | const struct lttng_action_stop_session *action_stop_session; | |
364 | enum lttng_action_status status; | |
365 | ||
366 | if (!action || !IS_STOP_SESSION_ACTION(action) || !session_name) { | |
367 | status = LTTNG_ACTION_STATUS_INVALID; | |
368 | goto end; | |
369 | } | |
370 | ||
371 | action_stop_session = action_stop_session_from_action_const(action); | |
372 | ||
373 | *session_name = action_stop_session->session_name; | |
374 | ||
375 | status = LTTNG_ACTION_STATUS_OK; | |
376 | end: | |
377 | return status; | |
378 | } | |
a5ec75db | 379 | |
7f4d5b07 | 380 | enum lttng_action_status lttng_action_stop_session_set_rate_policy( |
a5ec75db | 381 | struct lttng_action *action, |
7f4d5b07 | 382 | const struct lttng_rate_policy *policy) |
a5ec75db JR |
383 | { |
384 | enum lttng_action_status status; | |
385 | struct lttng_action_stop_session *stop_session_action; | |
7f4d5b07 | 386 | struct lttng_rate_policy *copy = NULL; |
a5ec75db JR |
387 | |
388 | if (!action || !policy || !IS_STOP_SESSION_ACTION(action)) { | |
389 | status = LTTNG_ACTION_STATUS_INVALID; | |
390 | goto end; | |
391 | } | |
392 | ||
7f4d5b07 | 393 | copy = lttng_rate_policy_copy(policy); |
a5ec75db JR |
394 | if (!copy) { |
395 | status = LTTNG_ACTION_STATUS_ERROR; | |
396 | goto end; | |
397 | } | |
398 | stop_session_action = action_stop_session_from_action(action); | |
399 | ||
7f4d5b07 JR |
400 | /* Free the previous rate policy .*/ |
401 | lttng_rate_policy_destroy(stop_session_action->policy); | |
a5ec75db JR |
402 | |
403 | stop_session_action->policy = copy; | |
404 | status = LTTNG_ACTION_STATUS_OK; | |
405 | copy = NULL; | |
406 | ||
407 | end: | |
7f4d5b07 | 408 | lttng_rate_policy_destroy(copy); |
a5ec75db JR |
409 | return status; |
410 | } | |
411 | ||
7f4d5b07 | 412 | enum lttng_action_status lttng_action_stop_session_get_rate_policy( |
a5ec75db | 413 | const struct lttng_action *action, |
7f4d5b07 | 414 | const struct lttng_rate_policy **policy) |
a5ec75db JR |
415 | { |
416 | enum lttng_action_status status; | |
417 | const struct lttng_action_stop_session *stop_session_action; | |
418 | ||
419 | if (!action || !policy || !IS_STOP_SESSION_ACTION(action)) { | |
420 | status = LTTNG_ACTION_STATUS_INVALID; | |
421 | goto end; | |
422 | } | |
423 | ||
424 | stop_session_action = action_stop_session_from_action_const(action); | |
425 | ||
426 | *policy = stop_session_action->policy; | |
427 | status = LTTNG_ACTION_STATUS_OK; | |
428 | end: | |
429 | return status; | |
430 | } | |
2d57482c | 431 | |
7f4d5b07 JR |
432 | static const struct lttng_rate_policy * |
433 | lttng_action_stop_session_internal_get_rate_policy( | |
2d57482c JR |
434 | const struct lttng_action *action) |
435 | { | |
436 | const struct lttng_action_stop_session *_action; | |
437 | _action = action_stop_session_from_action_const(action); | |
438 | ||
439 | return _action->policy; | |
440 | } |