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