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58397d0d 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> | |
11 | #include <lttng/action/action-internal.h> | |
7f4d5b07 JR |
12 | #include <lttng/action/rate-policy-internal.h> |
13 | #include <lttng/action/rate-policy.h> | |
58397d0d SM |
14 | #include <lttng/action/start-session-internal.h> |
15 | #include <lttng/action/start-session.h> | |
16 | ||
17 | #define IS_START_SESSION_ACTION(action) \ | |
17182cfd | 18 | (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_START_SESSION) |
58397d0d SM |
19 | |
20 | struct lttng_action_start_session { | |
21 | struct lttng_action parent; | |
22 | ||
23 | /* Owned by this. */ | |
24 | char *session_name; | |
7f4d5b07 | 25 | struct lttng_rate_policy *policy; |
58397d0d SM |
26 | }; |
27 | ||
28 | struct lttng_action_start_session_comm { | |
29 | /* Includes the trailing \0. */ | |
30 | uint32_t session_name_len; | |
31 | ||
32 | /* | |
33 | * Variable data: | |
34 | * | |
35 | * - session name (null terminated) | |
1345b16b | 36 | * - policy |
58397d0d SM |
37 | */ |
38 | char data[]; | |
39 | } LTTNG_PACKED; | |
40 | ||
7f4d5b07 JR |
41 | static const struct lttng_rate_policy * |
42 | lttng_action_start_session_internal_get_rate_policy( | |
2d57482c JR |
43 | const struct lttng_action *action); |
44 | ||
58397d0d SM |
45 | static struct lttng_action_start_session *action_start_session_from_action( |
46 | struct lttng_action *action) | |
47 | { | |
48 | assert(action); | |
49 | ||
50 | return container_of(action, struct lttng_action_start_session, parent); | |
51 | } | |
52 | ||
53 | static const struct lttng_action_start_session * | |
54 | action_start_session_from_action_const(const struct lttng_action *action) | |
55 | { | |
56 | assert(action); | |
57 | ||
58 | return container_of(action, struct lttng_action_start_session, parent); | |
59 | } | |
60 | ||
61 | static bool lttng_action_start_session_validate(struct lttng_action *action) | |
62 | { | |
63 | bool valid; | |
64 | struct lttng_action_start_session *action_start_session; | |
65 | ||
66 | if (!action) { | |
67 | valid = false; | |
68 | goto end; | |
69 | } | |
70 | ||
71 | action_start_session = action_start_session_from_action(action); | |
72 | ||
73 | /* A non-empty session name is mandatory. */ | |
74 | if (!action_start_session->session_name || | |
75 | strlen(action_start_session->session_name) == 0) { | |
76 | valid = false; | |
77 | goto end; | |
78 | } | |
79 | ||
80 | valid = true; | |
81 | end: | |
82 | return valid; | |
83 | } | |
84 | ||
85 | static bool lttng_action_start_session_is_equal( | |
86 | const struct lttng_action *_a, const struct lttng_action *_b) | |
87 | { | |
88 | bool is_equal = false; | |
89 | struct lttng_action_start_session *a, *b; | |
90 | ||
91 | a = container_of(_a, struct lttng_action_start_session, parent); | |
92 | b = container_of(_b, struct lttng_action_start_session, parent); | |
93 | ||
94 | /* Action is not valid if this is not true. */ | |
95 | assert(a->session_name); | |
96 | assert(b->session_name); | |
97 | if (strcmp(a->session_name, b->session_name)) { | |
98 | goto end; | |
99 | } | |
100 | ||
7f4d5b07 | 101 | is_equal = lttng_rate_policy_is_equal(a->policy, b->policy); |
58397d0d SM |
102 | end: |
103 | return is_equal; | |
104 | } | |
105 | ||
106 | static int lttng_action_start_session_serialize( | |
c0a66c84 | 107 | struct lttng_action *action, struct lttng_payload *payload) |
58397d0d SM |
108 | { |
109 | struct lttng_action_start_session *action_start_session; | |
110 | struct lttng_action_start_session_comm comm; | |
111 | size_t session_name_len; | |
112 | int ret; | |
113 | ||
114 | assert(action); | |
c0a66c84 | 115 | assert(payload); |
58397d0d SM |
116 | |
117 | action_start_session = action_start_session_from_action(action); | |
118 | ||
119 | assert(action_start_session->session_name); | |
120 | ||
121 | DBG("Serializing start session action: session-name: %s", | |
122 | action_start_session->session_name); | |
123 | ||
124 | session_name_len = strlen(action_start_session->session_name) + 1; | |
125 | comm.session_name_len = session_name_len; | |
126 | ||
c0a66c84 | 127 | ret = lttng_dynamic_buffer_append(&payload->buffer, &comm, sizeof(comm)); |
58397d0d SM |
128 | if (ret) { |
129 | ret = -1; | |
130 | goto end; | |
131 | } | |
132 | ||
c0a66c84 | 133 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
58397d0d SM |
134 | action_start_session->session_name, session_name_len); |
135 | if (ret) { | |
136 | ret = -1; | |
137 | goto end; | |
138 | } | |
139 | ||
7f4d5b07 | 140 | ret = lttng_rate_policy_serialize( |
1345b16b JR |
141 | action_start_session->policy, payload); |
142 | if (ret) { | |
143 | ret = -1; | |
144 | goto end; | |
145 | } | |
146 | ||
58397d0d SM |
147 | ret = 0; |
148 | end: | |
149 | return ret; | |
150 | } | |
151 | ||
152 | static void lttng_action_start_session_destroy(struct lttng_action *action) | |
153 | { | |
154 | struct lttng_action_start_session *action_start_session; | |
155 | ||
156 | if (!action) { | |
157 | goto end; | |
158 | } | |
159 | ||
160 | action_start_session = action_start_session_from_action(action); | |
161 | ||
7f4d5b07 | 162 | lttng_rate_policy_destroy(action_start_session->policy); |
58397d0d SM |
163 | free(action_start_session->session_name); |
164 | free(action_start_session); | |
165 | ||
166 | end: | |
167 | return; | |
168 | } | |
169 | ||
c0a66c84 JG |
170 | ssize_t lttng_action_start_session_create_from_payload( |
171 | struct lttng_payload_view *view, | |
58397d0d SM |
172 | struct lttng_action **p_action) |
173 | { | |
1345b16b | 174 | ssize_t consumed_len, ret; |
58397d0d SM |
175 | const struct lttng_action_start_session_comm *comm; |
176 | const char *session_name; | |
1345b16b | 177 | struct lttng_action *action = NULL; |
58397d0d | 178 | enum lttng_action_status status; |
7f4d5b07 | 179 | struct lttng_rate_policy *policy = NULL; |
58397d0d | 180 | |
c0a66c84 | 181 | comm = (typeof(comm)) view->buffer.data; |
58397d0d SM |
182 | session_name = (const char *) &comm->data; |
183 | ||
1345b16b | 184 | /* Session name */ |
c0a66c84 JG |
185 | if (!lttng_buffer_view_contains_string(&view->buffer, session_name, |
186 | comm->session_name_len)) { | |
58397d0d SM |
187 | consumed_len = -1; |
188 | goto end; | |
189 | } | |
1345b16b JR |
190 | consumed_len = sizeof(*comm) + comm->session_name_len; |
191 | ||
7f4d5b07 | 192 | /* Rate policy. */ |
1345b16b JR |
193 | { |
194 | struct lttng_payload_view policy_view = | |
195 | lttng_payload_view_from_view( | |
196 | view, consumed_len, -1); | |
7f4d5b07 | 197 | ret = lttng_rate_policy_create_from_payload( |
1345b16b JR |
198 | &policy_view, &policy); |
199 | if (ret < 0) { | |
200 | consumed_len = -1; | |
201 | goto end; | |
202 | } | |
203 | consumed_len += ret; | |
204 | } | |
205 | ||
206 | action = lttng_action_start_session_create(); | |
207 | if (!action) { | |
208 | consumed_len = -1; | |
209 | goto end; | |
210 | } | |
58397d0d SM |
211 | |
212 | status = lttng_action_start_session_set_session_name( | |
213 | action, session_name); | |
214 | if (status != LTTNG_ACTION_STATUS_OK) { | |
215 | consumed_len = -1; | |
216 | goto end; | |
217 | } | |
218 | ||
1345b16b | 219 | assert(policy); |
7f4d5b07 | 220 | status = lttng_action_start_session_set_rate_policy(action, policy); |
1345b16b JR |
221 | if (status != LTTNG_ACTION_STATUS_OK) { |
222 | consumed_len = -1; | |
223 | goto end; | |
224 | } | |
225 | ||
58397d0d SM |
226 | *p_action = action; |
227 | action = NULL; | |
228 | ||
229 | end: | |
7f4d5b07 | 230 | lttng_rate_policy_destroy(policy); |
58397d0d SM |
231 | lttng_action_start_session_destroy(action); |
232 | ||
233 | return consumed_len; | |
234 | } | |
235 | ||
236 | struct lttng_action *lttng_action_start_session_create(void) | |
237 | { | |
1345b16b | 238 | struct lttng_action *action = NULL; |
7f4d5b07 | 239 | struct lttng_rate_policy *policy = NULL; |
1345b16b JR |
240 | enum lttng_action_status status; |
241 | ||
7f4d5b07 JR |
242 | /* Create a every N = 1 rate policy. */ |
243 | policy = lttng_rate_policy_every_n_create(1); | |
1345b16b JR |
244 | if (!policy) { |
245 | goto end; | |
246 | } | |
58397d0d SM |
247 | |
248 | action = zmalloc(sizeof(struct lttng_action_start_session)); | |
249 | if (!action) { | |
250 | goto end; | |
251 | } | |
252 | ||
253 | lttng_action_init(action, LTTNG_ACTION_TYPE_START_SESSION, | |
254 | lttng_action_start_session_validate, | |
255 | lttng_action_start_session_serialize, | |
256 | lttng_action_start_session_is_equal, | |
2d57482c | 257 | lttng_action_start_session_destroy, |
588c4b0d JG |
258 | lttng_action_start_session_internal_get_rate_policy, |
259 | lttng_action_generic_add_error_query_results); | |
58397d0d | 260 | |
7f4d5b07 | 261 | status = lttng_action_start_session_set_rate_policy(action, policy); |
1345b16b JR |
262 | if (status != LTTNG_ACTION_STATUS_OK) { |
263 | free(action); | |
264 | action = NULL; | |
265 | goto end; | |
266 | } | |
267 | ||
58397d0d | 268 | end: |
7f4d5b07 | 269 | lttng_rate_policy_destroy(policy); |
58397d0d SM |
270 | return action; |
271 | } | |
272 | ||
273 | enum lttng_action_status lttng_action_start_session_set_session_name( | |
274 | struct lttng_action *action, const char *session_name) | |
275 | { | |
276 | struct lttng_action_start_session *action_start_session; | |
277 | enum lttng_action_status status; | |
278 | ||
279 | if (!action || !IS_START_SESSION_ACTION(action) || !session_name || | |
280 | strlen(session_name) == 0) { | |
281 | status = LTTNG_ACTION_STATUS_INVALID; | |
282 | goto end; | |
283 | } | |
284 | ||
285 | action_start_session = action_start_session_from_action(action); | |
286 | ||
287 | free(action_start_session->session_name); | |
288 | ||
289 | action_start_session->session_name = strdup(session_name); | |
290 | if (!action_start_session->session_name) { | |
291 | status = LTTNG_ACTION_STATUS_ERROR; | |
292 | goto end; | |
293 | } | |
294 | ||
295 | status = LTTNG_ACTION_STATUS_OK; | |
296 | end: | |
297 | return status; | |
298 | } | |
299 | ||
300 | enum lttng_action_status lttng_action_start_session_get_session_name( | |
301 | const struct lttng_action *action, const char **session_name) | |
302 | { | |
303 | const struct lttng_action_start_session *action_start_session; | |
304 | enum lttng_action_status status; | |
305 | ||
306 | if (!action || !IS_START_SESSION_ACTION(action) || !session_name) { | |
307 | status = LTTNG_ACTION_STATUS_INVALID; | |
308 | goto end; | |
309 | } | |
310 | ||
311 | action_start_session = action_start_session_from_action_const(action); | |
312 | ||
313 | *session_name = action_start_session->session_name; | |
314 | ||
315 | status = LTTNG_ACTION_STATUS_OK; | |
316 | end: | |
317 | return status; | |
318 | } | |
1345b16b | 319 | |
7f4d5b07 | 320 | enum lttng_action_status lttng_action_start_session_set_rate_policy( |
1345b16b | 321 | struct lttng_action *action, |
7f4d5b07 | 322 | const struct lttng_rate_policy *policy) |
1345b16b JR |
323 | { |
324 | enum lttng_action_status status; | |
325 | struct lttng_action_start_session *start_session_action; | |
7f4d5b07 | 326 | struct lttng_rate_policy *copy = NULL; |
1345b16b JR |
327 | |
328 | if (!action || !policy || !IS_START_SESSION_ACTION(action)) { | |
329 | status = LTTNG_ACTION_STATUS_INVALID; | |
330 | goto end; | |
331 | } | |
332 | ||
7f4d5b07 | 333 | copy = lttng_rate_policy_copy(policy); |
1345b16b JR |
334 | if (!copy) { |
335 | status = LTTNG_ACTION_STATUS_ERROR; | |
336 | goto end; | |
337 | } | |
338 | ||
339 | start_session_action = action_start_session_from_action(action); | |
340 | ||
7f4d5b07 JR |
341 | /* Release the previous rate policy .*/ |
342 | lttng_rate_policy_destroy(start_session_action->policy); | |
1345b16b JR |
343 | |
344 | /* Assign the policy. */ | |
345 | start_session_action->policy = copy; | |
346 | status = LTTNG_ACTION_STATUS_OK; | |
347 | copy = NULL; | |
348 | ||
349 | end: | |
7f4d5b07 | 350 | lttng_rate_policy_destroy(copy); |
1345b16b JR |
351 | return status; |
352 | } | |
353 | ||
7f4d5b07 | 354 | enum lttng_action_status lttng_action_start_session_get_rate_policy( |
1345b16b | 355 | const struct lttng_action *action, |
7f4d5b07 | 356 | const struct lttng_rate_policy **policy) |
1345b16b JR |
357 | { |
358 | enum lttng_action_status status; | |
359 | const struct lttng_action_start_session *start_session_action; | |
360 | ||
361 | if (!action || !policy || !IS_START_SESSION_ACTION(action)) { | |
362 | status = LTTNG_ACTION_STATUS_INVALID; | |
363 | goto end; | |
364 | } | |
365 | ||
366 | start_session_action = action_start_session_from_action_const(action); | |
367 | ||
368 | *policy = start_session_action->policy; | |
369 | status = LTTNG_ACTION_STATUS_OK; | |
370 | end: | |
371 | return status; | |
372 | } | |
2d57482c | 373 | |
7f4d5b07 JR |
374 | static const struct lttng_rate_policy * |
375 | lttng_action_start_session_internal_get_rate_policy( | |
2d57482c JR |
376 | const struct lttng_action *action) |
377 | { | |
378 | const struct lttng_action_start_session *_action; | |
379 | _action = action_start_session_from_action_const(action); | |
380 | ||
381 | return _action->policy; | |
382 | } |