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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 | ||
8 | #include <assert.h> | |
9 | #include <common/error.h> | |
10 | #include <common/macros.h> | |
11 | #include <lttng/action/action-internal.h> | |
a5ec75db JR |
12 | #include <lttng/action/firing-policy-internal.h> |
13 | #include <lttng/action/firing-policy.h> | |
931bdbaa SM |
14 | #include <lttng/action/stop-session-internal.h> |
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 SM |
19 | |
20 | struct lttng_action_stop_session { | |
21 | struct lttng_action parent; | |
22 | ||
23 | /* Owned by this. */ | |
24 | char *session_name; | |
a5ec75db | 25 | struct lttng_firing_policy *policy; |
931bdbaa SM |
26 | }; |
27 | ||
28 | struct lttng_action_stop_session_comm { | |
29 | /* Includes the trailing \0. */ | |
30 | uint32_t session_name_len; | |
31 | ||
32 | /* | |
33 | * Variable data: | |
34 | * | |
35 | * - session name (null terminated) | |
a5ec75db | 36 | * - policy |
931bdbaa SM |
37 | */ |
38 | char data[]; | |
39 | } LTTNG_PACKED; | |
40 | ||
41 | static struct lttng_action_stop_session *action_stop_session_from_action( | |
42 | struct lttng_action *action) | |
43 | { | |
44 | assert(action); | |
45 | ||
46 | return container_of(action, struct lttng_action_stop_session, parent); | |
47 | } | |
48 | ||
49 | static const struct lttng_action_stop_session * | |
50 | action_stop_session_from_action_const(const struct lttng_action *action) | |
51 | { | |
52 | assert(action); | |
53 | ||
54 | return container_of(action, struct lttng_action_stop_session, parent); | |
55 | } | |
56 | ||
57 | static bool lttng_action_stop_session_validate(struct lttng_action *action) | |
58 | { | |
59 | bool valid; | |
60 | struct lttng_action_stop_session *action_stop_session; | |
61 | ||
62 | if (!action) { | |
63 | valid = false; | |
64 | goto end; | |
65 | } | |
66 | ||
67 | action_stop_session = action_stop_session_from_action(action); | |
68 | ||
69 | /* A non-empty session name is mandatory. */ | |
70 | if (!action_stop_session->session_name || | |
71 | strlen(action_stop_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_stop_session_is_equal( | |
82 | const struct lttng_action *_a, const struct lttng_action *_b) | |
83 | { | |
84 | bool is_equal = false; | |
85 | const struct lttng_action_stop_session *a, *b; | |
86 | ||
87 | a = action_stop_session_from_action_const(_a); | |
88 | b = action_stop_session_from_action_const(_b); | |
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 | ||
a5ec75db | 97 | is_equal = lttng_firing_policy_is_equal(a->policy, b->policy); |
931bdbaa SM |
98 | end: |
99 | return is_equal; | |
100 | } | |
101 | ||
102 | static int lttng_action_stop_session_serialize( | |
c0a66c84 | 103 | struct lttng_action *action, struct lttng_payload *payload) |
931bdbaa SM |
104 | { |
105 | struct lttng_action_stop_session *action_stop_session; | |
106 | struct lttng_action_stop_session_comm comm; | |
107 | size_t session_name_len; | |
108 | int ret; | |
109 | ||
110 | assert(action); | |
c0a66c84 | 111 | assert(payload); |
931bdbaa SM |
112 | |
113 | action_stop_session = action_stop_session_from_action(action); | |
114 | ||
115 | assert(action_stop_session->session_name); | |
116 | ||
117 | DBG("Serializing stop session action: session-name: %s", | |
118 | action_stop_session->session_name); | |
119 | ||
120 | session_name_len = strlen(action_stop_session->session_name) + 1; | |
121 | comm.session_name_len = session_name_len; | |
122 | ||
c0a66c84 JG |
123 | ret = lttng_dynamic_buffer_append( |
124 | &payload->buffer, &comm, sizeof(comm)); | |
931bdbaa SM |
125 | if (ret) { |
126 | ret = -1; | |
127 | goto end; | |
128 | } | |
129 | ||
c0a66c84 | 130 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
931bdbaa SM |
131 | action_stop_session->session_name, session_name_len); |
132 | if (ret) { | |
133 | ret = -1; | |
134 | goto end; | |
135 | } | |
136 | ||
a5ec75db JR |
137 | ret = lttng_firing_policy_serialize( |
138 | action_stop_session->policy, payload); | |
139 | if (ret) { | |
140 | ret = -1; | |
141 | goto end; | |
142 | } | |
143 | ||
931bdbaa SM |
144 | ret = 0; |
145 | end: | |
146 | return ret; | |
147 | } | |
148 | ||
149 | static void lttng_action_stop_session_destroy(struct lttng_action *action) | |
150 | { | |
151 | struct lttng_action_stop_session *action_stop_session; | |
152 | ||
153 | if (!action) { | |
154 | goto end; | |
155 | } | |
156 | ||
157 | action_stop_session = action_stop_session_from_action(action); | |
158 | ||
a5ec75db | 159 | lttng_firing_policy_destroy(action_stop_session->policy); |
931bdbaa SM |
160 | free(action_stop_session->session_name); |
161 | free(action_stop_session); | |
162 | ||
163 | end: | |
164 | return; | |
165 | } | |
166 | ||
c0a66c84 JG |
167 | ssize_t lttng_action_stop_session_create_from_payload( |
168 | struct lttng_payload_view *view, | |
931bdbaa SM |
169 | struct lttng_action **p_action) |
170 | { | |
a5ec75db | 171 | ssize_t consumed_len, ret; |
931bdbaa SM |
172 | const struct lttng_action_stop_session_comm *comm; |
173 | const char *session_name; | |
a5ec75db | 174 | struct lttng_action *action = NULL; |
931bdbaa | 175 | enum lttng_action_status status; |
a5ec75db | 176 | struct lttng_firing_policy *policy = NULL; |
931bdbaa | 177 | |
c0a66c84 | 178 | comm = (typeof(comm)) view->buffer.data; |
931bdbaa SM |
179 | session_name = (const char *) &comm->data; |
180 | ||
a5ec75db | 181 | /* Session name. */ |
931bdbaa | 182 | if (!lttng_buffer_view_contains_string( |
c0a66c84 | 183 | &view->buffer, session_name, comm->session_name_len)) { |
931bdbaa SM |
184 | consumed_len = -1; |
185 | goto end; | |
186 | } | |
a5ec75db JR |
187 | consumed_len = sizeof(*comm) + comm->session_name_len; |
188 | ||
189 | /* Firing policy. */ | |
190 | { | |
191 | struct lttng_payload_view policy_view = | |
192 | lttng_payload_view_from_view( | |
193 | view, consumed_len, -1); | |
194 | ret = lttng_firing_policy_create_from_payload( | |
195 | &policy_view, &policy); | |
196 | if (ret < 0) { | |
197 | consumed_len = -1; | |
198 | goto end; | |
199 | } | |
200 | consumed_len += ret; | |
201 | } | |
202 | ||
203 | action = lttng_action_stop_session_create(); | |
204 | if (!action) { | |
205 | consumed_len = -1; | |
206 | goto end; | |
207 | } | |
931bdbaa SM |
208 | |
209 | status = lttng_action_stop_session_set_session_name( | |
210 | action, session_name); | |
211 | if (status != LTTNG_ACTION_STATUS_OK) { | |
212 | consumed_len = -1; | |
213 | goto end; | |
214 | } | |
215 | ||
a5ec75db JR |
216 | assert(policy); |
217 | status = lttng_action_stop_session_set_firing_policy(action, policy); | |
218 | if (status != LTTNG_ACTION_STATUS_OK) { | |
219 | consumed_len = -1; | |
220 | goto end; | |
221 | } | |
222 | ||
931bdbaa SM |
223 | *p_action = action; |
224 | action = NULL; | |
225 | ||
226 | end: | |
a5ec75db | 227 | lttng_firing_policy_destroy(policy); |
931bdbaa SM |
228 | lttng_action_stop_session_destroy(action); |
229 | ||
230 | return consumed_len; | |
231 | } | |
232 | ||
233 | struct lttng_action *lttng_action_stop_session_create(void) | |
234 | { | |
a5ec75db JR |
235 | struct lttng_action *action = NULL; |
236 | struct lttng_firing_policy *policy = NULL; | |
237 | enum lttng_action_status status; | |
238 | ||
239 | /* Create a every N = 1 firing policy. */ | |
240 | policy = lttng_firing_policy_every_n_create(1); | |
241 | if (!policy) { | |
242 | goto end; | |
243 | } | |
931bdbaa SM |
244 | |
245 | action = zmalloc(sizeof(struct lttng_action_stop_session)); | |
246 | if (!action) { | |
247 | goto end; | |
248 | } | |
249 | ||
250 | lttng_action_init(action, LTTNG_ACTION_TYPE_STOP_SESSION, | |
251 | lttng_action_stop_session_validate, | |
252 | lttng_action_stop_session_serialize, | |
253 | lttng_action_stop_session_is_equal, | |
254 | lttng_action_stop_session_destroy); | |
255 | ||
a5ec75db JR |
256 | status = lttng_action_stop_session_set_firing_policy(action, policy); |
257 | if (status != LTTNG_ACTION_STATUS_OK) { | |
258 | free(action); | |
259 | action = NULL; | |
260 | goto end; | |
261 | } | |
262 | ||
931bdbaa | 263 | end: |
a5ec75db | 264 | lttng_firing_policy_destroy(policy); |
931bdbaa SM |
265 | return action; |
266 | } | |
267 | ||
268 | enum lttng_action_status lttng_action_stop_session_set_session_name( | |
269 | struct lttng_action *action, const char *session_name) | |
270 | { | |
271 | struct lttng_action_stop_session *action_stop_session; | |
272 | enum lttng_action_status status; | |
273 | ||
274 | if (!action || !IS_STOP_SESSION_ACTION(action) || !session_name || | |
275 | strlen(session_name) == 0) { | |
276 | status = LTTNG_ACTION_STATUS_INVALID; | |
277 | goto end; | |
278 | } | |
279 | ||
280 | action_stop_session = action_stop_session_from_action(action); | |
281 | ||
282 | free(action_stop_session->session_name); | |
283 | ||
284 | action_stop_session->session_name = strdup(session_name); | |
285 | if (!action_stop_session->session_name) { | |
286 | status = LTTNG_ACTION_STATUS_ERROR; | |
287 | goto end; | |
288 | } | |
289 | ||
290 | status = LTTNG_ACTION_STATUS_OK; | |
291 | end: | |
292 | return status; | |
293 | } | |
294 | ||
295 | enum lttng_action_status lttng_action_stop_session_get_session_name( | |
296 | const struct lttng_action *action, const char **session_name) | |
297 | { | |
298 | const struct lttng_action_stop_session *action_stop_session; | |
299 | enum lttng_action_status status; | |
300 | ||
301 | if (!action || !IS_STOP_SESSION_ACTION(action) || !session_name) { | |
302 | status = LTTNG_ACTION_STATUS_INVALID; | |
303 | goto end; | |
304 | } | |
305 | ||
306 | action_stop_session = action_stop_session_from_action_const(action); | |
307 | ||
308 | *session_name = action_stop_session->session_name; | |
309 | ||
310 | status = LTTNG_ACTION_STATUS_OK; | |
311 | end: | |
312 | return status; | |
313 | } | |
a5ec75db JR |
314 | |
315 | enum lttng_action_status lttng_action_stop_session_set_firing_policy( | |
316 | struct lttng_action *action, | |
317 | const struct lttng_firing_policy *policy) | |
318 | { | |
319 | enum lttng_action_status status; | |
320 | struct lttng_action_stop_session *stop_session_action; | |
321 | struct lttng_firing_policy *copy = NULL; | |
322 | ||
323 | if (!action || !policy || !IS_STOP_SESSION_ACTION(action)) { | |
324 | status = LTTNG_ACTION_STATUS_INVALID; | |
325 | goto end; | |
326 | } | |
327 | ||
328 | copy = lttng_firing_policy_copy(policy); | |
329 | if (!copy) { | |
330 | status = LTTNG_ACTION_STATUS_ERROR; | |
331 | goto end; | |
332 | } | |
333 | stop_session_action = action_stop_session_from_action(action); | |
334 | ||
335 | /* Free the previous firing policy .*/ | |
336 | lttng_firing_policy_destroy(stop_session_action->policy); | |
337 | ||
338 | stop_session_action->policy = copy; | |
339 | status = LTTNG_ACTION_STATUS_OK; | |
340 | copy = NULL; | |
341 | ||
342 | end: | |
343 | lttng_firing_policy_destroy(copy); | |
344 | return status; | |
345 | } | |
346 | ||
347 | enum lttng_action_status lttng_action_stop_session_get_firing_policy( | |
348 | const struct lttng_action *action, | |
349 | const struct lttng_firing_policy **policy) | |
350 | { | |
351 | enum lttng_action_status status; | |
352 | const struct lttng_action_stop_session *stop_session_action; | |
353 | ||
354 | if (!action || !policy || !IS_STOP_SESSION_ACTION(action)) { | |
355 | status = LTTNG_ACTION_STATUS_INVALID; | |
356 | goto end; | |
357 | } | |
358 | ||
359 | stop_session_action = action_stop_session_from_action_const(action); | |
360 | ||
361 | *policy = stop_session_action->policy; | |
362 | status = LTTNG_ACTION_STATUS_OK; | |
363 | end: | |
364 | return status; | |
365 | } |