Commit | Line | Data |
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ab0ee2ca | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
ab0ee2ca | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
ab0ee2ca | 5 | * |
ab0ee2ca JG |
6 | */ |
7 | ||
8 | #include <lttng/trigger/trigger.h> | |
9 | #include <lttng/lttng-error.h> | |
10 | #include "notification-thread.h" | |
11 | #include "notification-thread-commands.h" | |
12 | #include <common/error.h> | |
5024c2ac | 13 | #include <common/macros.h> |
ab0ee2ca JG |
14 | #include <unistd.h> |
15 | #include <stdint.h> | |
16 | #include <inttypes.h> | |
17 | ||
18 | static | |
19 | void init_notification_thread_command(struct notification_thread_command *cmd) | |
20 | { | |
ab0ee2ca | 21 | CDS_INIT_LIST_HEAD(&cmd->cmd_list_node); |
8ada111f | 22 | lttng_waiter_init(&cmd->reply_waiter); |
ab0ee2ca JG |
23 | } |
24 | ||
25 | static | |
26 | int run_command_wait(struct notification_thread_handle *handle, | |
27 | struct notification_thread_command *cmd) | |
28 | { | |
29 | int ret; | |
30 | uint64_t notification_counter = 1; | |
31 | ||
ab0ee2ca JG |
32 | pthread_mutex_lock(&handle->cmd_queue.lock); |
33 | /* Add to queue. */ | |
34 | cds_list_add_tail(&cmd->cmd_list_node, | |
35 | &handle->cmd_queue.list); | |
36 | /* Wake-up thread. */ | |
58d3fed5 | 37 | ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe), |
ab0ee2ca | 38 | ¬ification_counter, sizeof(notification_counter)); |
58d3fed5 | 39 | if (ret != sizeof(notification_counter)) { |
ab0ee2ca JG |
40 | PERROR("write to notification thread's queue event fd"); |
41 | /* | |
42 | * Remove the command from the list so the notification | |
43 | * thread does not process it. | |
44 | */ | |
45 | cds_list_del(&cmd->cmd_list_node); | |
46 | goto error_unlock_queue; | |
47 | } | |
48 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
49 | ||
8ada111f | 50 | lttng_waiter_wait(&cmd->reply_waiter); |
ab0ee2ca JG |
51 | return 0; |
52 | error_unlock_queue: | |
53 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
54 | return -1; | |
55 | } | |
56 | ||
5024c2ac JR |
57 | static |
58 | struct notification_thread_command *notification_thread_command_copy( | |
59 | const struct notification_thread_command *original_cmd) | |
60 | { | |
61 | struct notification_thread_command *new_cmd; | |
62 | ||
63 | new_cmd = zmalloc(sizeof(*new_cmd)); | |
64 | if (!new_cmd) { | |
65 | goto end; | |
66 | } | |
67 | ||
68 | *new_cmd = *original_cmd; | |
69 | init_notification_thread_command(new_cmd); | |
70 | end: | |
71 | return new_cmd; | |
72 | } | |
73 | ||
74 | static | |
75 | int run_command_no_wait(struct notification_thread_handle *handle, | |
76 | const struct notification_thread_command *in_cmd) | |
77 | { | |
78 | int ret; | |
79 | uint64_t notification_counter = 1; | |
80 | struct notification_thread_command *new_cmd = | |
81 | notification_thread_command_copy(in_cmd); | |
82 | ||
83 | if (!new_cmd) { | |
84 | goto error; | |
85 | } | |
86 | new_cmd->is_async = true; | |
87 | ||
88 | pthread_mutex_lock(&handle->cmd_queue.lock); | |
89 | /* Add to queue. */ | |
90 | cds_list_add_tail(&new_cmd->cmd_list_node, | |
91 | &handle->cmd_queue.list); | |
92 | /* Wake-up thread. */ | |
93 | ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe), | |
94 | ¬ification_counter, sizeof(notification_counter)); | |
95 | if (ret != sizeof(notification_counter)) { | |
96 | PERROR("write to notification thread's queue event fd"); | |
97 | /* | |
98 | * Remove the command from the list so the notification | |
99 | * thread does not process it. | |
100 | */ | |
101 | cds_list_del(&new_cmd->cmd_list_node); | |
102 | goto error_unlock_queue; | |
103 | } | |
104 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
105 | return 0; | |
106 | error_unlock_queue: | |
107 | free(new_cmd); | |
108 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
109 | error: | |
110 | return -1; | |
111 | } | |
112 | ||
ab0ee2ca JG |
113 | enum lttng_error_code notification_thread_command_register_trigger( |
114 | struct notification_thread_handle *handle, | |
115 | struct lttng_trigger *trigger) | |
116 | { | |
117 | int ret; | |
118 | enum lttng_error_code ret_code; | |
5024c2ac | 119 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
120 | |
121 | init_notification_thread_command(&cmd); | |
122 | ||
123 | cmd.type = NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER; | |
124 | cmd.parameters.trigger = trigger; | |
125 | ||
126 | ret = run_command_wait(handle, &cmd); | |
127 | if (ret) { | |
128 | ret_code = LTTNG_ERR_UNK; | |
129 | goto end; | |
130 | } | |
131 | ret_code = cmd.reply_code; | |
132 | end: | |
133 | return ret_code; | |
134 | } | |
135 | ||
136 | enum lttng_error_code notification_thread_command_unregister_trigger( | |
137 | struct notification_thread_handle *handle, | |
138 | struct lttng_trigger *trigger) | |
139 | { | |
140 | int ret; | |
141 | enum lttng_error_code ret_code; | |
5024c2ac | 142 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
143 | |
144 | init_notification_thread_command(&cmd); | |
145 | ||
146 | cmd.type = NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER; | |
147 | cmd.parameters.trigger = trigger; | |
148 | ||
149 | ret = run_command_wait(handle, &cmd); | |
150 | if (ret) { | |
151 | ret_code = LTTNG_ERR_UNK; | |
152 | goto end; | |
153 | } | |
154 | ret_code = cmd.reply_code; | |
155 | end: | |
156 | return ret_code; | |
157 | } | |
158 | ||
159 | enum lttng_error_code notification_thread_command_add_channel( | |
160 | struct notification_thread_handle *handle, | |
161 | char *session_name, uid_t uid, gid_t gid, | |
162 | char *channel_name, uint64_t key, | |
163 | enum lttng_domain_type domain, uint64_t capacity) | |
164 | { | |
165 | int ret; | |
166 | enum lttng_error_code ret_code; | |
5024c2ac | 167 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
168 | |
169 | init_notification_thread_command(&cmd); | |
170 | ||
171 | cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL; | |
8abe313a JG |
172 | cmd.parameters.add_channel.session.name = session_name; |
173 | cmd.parameters.add_channel.session.uid = uid; | |
174 | cmd.parameters.add_channel.session.gid = gid; | |
175 | cmd.parameters.add_channel.channel.name = channel_name; | |
176 | cmd.parameters.add_channel.channel.key = key; | |
177 | cmd.parameters.add_channel.channel.domain = domain; | |
178 | cmd.parameters.add_channel.channel.capacity = capacity; | |
ab0ee2ca JG |
179 | |
180 | ret = run_command_wait(handle, &cmd); | |
181 | if (ret) { | |
182 | ret_code = LTTNG_ERR_UNK; | |
183 | goto end; | |
184 | } | |
185 | ret_code = cmd.reply_code; | |
186 | end: | |
187 | return ret_code; | |
188 | } | |
189 | ||
190 | enum lttng_error_code notification_thread_command_remove_channel( | |
191 | struct notification_thread_handle *handle, | |
192 | uint64_t key, enum lttng_domain_type domain) | |
193 | { | |
194 | int ret; | |
195 | enum lttng_error_code ret_code; | |
5024c2ac | 196 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
197 | |
198 | init_notification_thread_command(&cmd); | |
199 | ||
200 | cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL; | |
201 | cmd.parameters.remove_channel.key = key; | |
202 | cmd.parameters.remove_channel.domain = domain; | |
203 | ||
204 | ret = run_command_wait(handle, &cmd); | |
205 | if (ret) { | |
206 | ret_code = LTTNG_ERR_UNK; | |
207 | goto end; | |
208 | } | |
209 | ret_code = cmd.reply_code; | |
210 | end: | |
211 | return ret_code; | |
212 | } | |
213 | ||
731c1b12 JG |
214 | enum lttng_error_code notification_thread_command_session_rotation_ongoing( |
215 | struct notification_thread_handle *handle, | |
216 | const char *session_name, uid_t uid, gid_t gid, | |
217 | uint64_t trace_archive_chunk_id) | |
218 | { | |
219 | int ret; | |
220 | enum lttng_error_code ret_code; | |
5024c2ac | 221 | struct notification_thread_command cmd = {}; |
731c1b12 JG |
222 | |
223 | init_notification_thread_command(&cmd); | |
224 | ||
225 | cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_ONGOING; | |
226 | cmd.parameters.session_rotation.session_name = session_name; | |
227 | cmd.parameters.session_rotation.uid = uid; | |
228 | cmd.parameters.session_rotation.gid = gid; | |
229 | cmd.parameters.session_rotation.trace_archive_chunk_id = | |
230 | trace_archive_chunk_id; | |
231 | ||
232 | ret = run_command_wait(handle, &cmd); | |
233 | if (ret) { | |
234 | ret_code = LTTNG_ERR_UNK; | |
235 | goto end; | |
236 | } | |
237 | ret_code = cmd.reply_code; | |
238 | end: | |
239 | return ret_code; | |
240 | } | |
241 | ||
242 | enum lttng_error_code notification_thread_command_session_rotation_completed( | |
243 | struct notification_thread_handle *handle, | |
244 | const char *session_name, uid_t uid, gid_t gid, | |
245 | uint64_t trace_archive_chunk_id, | |
246 | struct lttng_trace_archive_location *location) | |
247 | { | |
248 | int ret; | |
249 | enum lttng_error_code ret_code; | |
5024c2ac | 250 | struct notification_thread_command cmd = {}; |
731c1b12 JG |
251 | |
252 | init_notification_thread_command(&cmd); | |
253 | ||
254 | cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_COMPLETED; | |
255 | cmd.parameters.session_rotation.session_name = session_name; | |
256 | cmd.parameters.session_rotation.uid = uid; | |
257 | cmd.parameters.session_rotation.gid = gid; | |
258 | cmd.parameters.session_rotation.trace_archive_chunk_id = | |
259 | trace_archive_chunk_id; | |
260 | cmd.parameters.session_rotation.location = location; | |
261 | ||
262 | ret = run_command_wait(handle, &cmd); | |
263 | if (ret) { | |
264 | ret_code = LTTNG_ERR_UNK; | |
265 | goto end; | |
266 | } | |
267 | ret_code = cmd.reply_code; | |
268 | end: | |
269 | return ret_code; | |
270 | } | |
271 | ||
5024c2ac JR |
272 | enum lttng_error_code notification_thread_command_add_application( |
273 | struct notification_thread_handle *handle, | |
274 | struct lttng_pipe *pipe) | |
275 | { | |
276 | int ret; | |
277 | enum lttng_error_code ret_code; | |
278 | struct notification_thread_command cmd = {}; | |
279 | ||
280 | init_notification_thread_command(&cmd); | |
281 | ||
282 | cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_APPLICATION; | |
283 | cmd.parameters.application.read_side_trigger_event_application_pipe = lttng_pipe_get_readfd(pipe); | |
284 | ||
285 | ret = run_command_wait(handle, &cmd); | |
286 | if (ret) { | |
287 | ret_code = LTTNG_ERR_UNK; | |
288 | goto end; | |
289 | } | |
290 | ret_code = cmd.reply_code; | |
291 | end: | |
292 | return ret_code; | |
293 | } | |
294 | ||
295 | enum lttng_error_code notification_thread_command_remove_application( | |
296 | struct notification_thread_handle *handle, | |
297 | struct lttng_pipe *pipe) | |
298 | { | |
299 | int ret; | |
300 | enum lttng_error_code ret_code; | |
301 | struct notification_thread_command cmd = {}; | |
302 | ||
303 | init_notification_thread_command(&cmd); | |
304 | ||
305 | cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_APPLICATION; | |
306 | cmd.parameters.application.read_side_trigger_event_application_pipe = lttng_pipe_get_readfd(pipe); | |
307 | ||
308 | ret = run_command_wait(handle, &cmd); | |
309 | if (ret) { | |
310 | ret_code = LTTNG_ERR_UNK; | |
311 | goto end; | |
312 | } | |
313 | ret_code = cmd.reply_code; | |
314 | end: | |
315 | return ret_code; | |
316 | } | |
317 | ||
318 | enum lttng_error_code notification_thread_command_get_tokens( | |
319 | struct notification_thread_handle *handle, | |
320 | struct lttng_triggers **tokens_triggers) | |
321 | { | |
322 | int ret; | |
323 | enum lttng_error_code ret_code; | |
324 | struct notification_thread_command cmd = {}; | |
325 | ||
326 | assert(handle); | |
327 | assert(tokens_triggers); | |
328 | ||
329 | init_notification_thread_command(&cmd); | |
330 | ||
331 | cmd.type = NOTIFICATION_COMMAND_TYPE_GET_TOKENS; | |
332 | ||
333 | ret = run_command_wait(handle, &cmd); | |
334 | if (ret) { | |
335 | ret_code = LTTNG_ERR_UNK; | |
336 | goto end; | |
337 | } | |
338 | ret_code = cmd.reply_code; | |
339 | *tokens_triggers = cmd.reply.get_tokens.triggers; | |
340 | ||
341 | end: | |
342 | return ret_code; | |
343 | } | |
344 | ||
345 | enum lttng_error_code notification_thread_command_list_triggers( | |
346 | struct notification_thread_handle *handle, | |
347 | uid_t uid, | |
348 | gid_t gid, | |
349 | struct lttng_triggers **triggers) | |
350 | { | |
351 | int ret; | |
352 | enum lttng_error_code ret_code; | |
353 | struct notification_thread_command cmd = {}; | |
354 | ||
355 | assert(handle); | |
356 | assert(triggers); | |
357 | ||
358 | init_notification_thread_command(&cmd); | |
359 | ||
360 | cmd.type = NOTIFICATION_COMMAND_TYPE_LIST_TRIGGERS; | |
361 | cmd.parameters.list_triggers.uid = uid; | |
362 | cmd.parameters.list_triggers.gid = gid; | |
363 | ||
364 | ret = run_command_wait(handle, &cmd); | |
365 | if (ret) { | |
366 | ret_code = LTTNG_ERR_UNK; | |
367 | goto end; | |
368 | } | |
369 | ret_code = cmd.reply_code; | |
370 | *triggers = cmd.reply.list_triggers.triggers; | |
371 | ||
372 | end: | |
373 | return ret_code; | |
374 | } | |
375 | ||
ab0ee2ca JG |
376 | void notification_thread_command_quit( |
377 | struct notification_thread_handle *handle) | |
378 | { | |
379 | int ret; | |
5024c2ac | 380 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
381 | |
382 | init_notification_thread_command(&cmd); | |
383 | ||
384 | cmd.type = NOTIFICATION_COMMAND_TYPE_QUIT; | |
385 | ret = run_command_wait(handle, &cmd); | |
386 | assert(!ret && cmd.reply_code == LTTNG_OK); | |
387 | } | |
5024c2ac JR |
388 | |
389 | int notification_thread_client_communication_update( | |
390 | struct notification_thread_handle *handle, | |
391 | notification_client_id id, | |
392 | enum client_transmission_status transmission_status) | |
393 | { | |
394 | struct notification_thread_command cmd = {}; | |
395 | ||
396 | init_notification_thread_command(&cmd); | |
397 | ||
398 | cmd.type = NOTIFICATION_COMMAND_TYPE_CLIENT_COMMUNICATION_UPDATE; | |
399 | cmd.parameters.client_communication_update.id = id; | |
400 | cmd.parameters.client_communication_update.status = transmission_status; | |
401 | return run_command_no_wait(handle, &cmd); | |
402 | } | |
403 | ||
404 | /* | |
405 | * Takes ownership of the payload if present. | |
406 | */ | |
407 | LTTNG_HIDDEN | |
408 | struct lttng_trigger_notification *lttng_trigger_notification_create( | |
409 | uint64_t id, | |
410 | enum lttng_domain_type domain, | |
411 | char *payload, | |
412 | size_t payload_size) | |
413 | { | |
414 | struct lttng_trigger_notification *notification = NULL; | |
415 | ||
416 | assert(domain != LTTNG_DOMAIN_NONE); | |
417 | ||
418 | if (payload) { | |
419 | assert(payload_size > 0); | |
420 | } else { | |
421 | assert(payload_size == 0); | |
422 | } | |
423 | ||
424 | notification = zmalloc(sizeof(struct lttng_trigger_notification)); | |
425 | if (notification == NULL) { | |
426 | ERR("[notification-thread] Error allocating notification "); | |
427 | goto end; | |
428 | } | |
429 | ||
430 | notification->id = id; | |
431 | notification->type = domain; | |
432 | notification->capture_buffer = payload; | |
433 | notification->capture_buf_size = payload_size; | |
434 | ||
435 | end: | |
436 | return notification; | |
437 | } | |
438 | ||
439 | LTTNG_HIDDEN | |
440 | void lttng_trigger_notification_destroy( | |
441 | struct lttng_trigger_notification *notification) | |
442 | { | |
443 | if (!notification) { | |
444 | return; | |
445 | } | |
446 | ||
447 | if(notification->capture_buffer) { | |
448 | free(notification->capture_buffer); | |
449 | } | |
450 | free(notification); | |
451 | } |