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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> | |
ab0ee2ca JG |
13 | #include <unistd.h> |
14 | #include <stdint.h> | |
15 | #include <inttypes.h> | |
16 | ||
17 | static | |
18 | void init_notification_thread_command(struct notification_thread_command *cmd) | |
19 | { | |
ab0ee2ca | 20 | CDS_INIT_LIST_HEAD(&cmd->cmd_list_node); |
8ada111f | 21 | lttng_waiter_init(&cmd->reply_waiter); |
ab0ee2ca JG |
22 | } |
23 | ||
24 | static | |
25 | int run_command_wait(struct notification_thread_handle *handle, | |
26 | struct notification_thread_command *cmd) | |
27 | { | |
28 | int ret; | |
29 | uint64_t notification_counter = 1; | |
30 | ||
ab0ee2ca JG |
31 | pthread_mutex_lock(&handle->cmd_queue.lock); |
32 | /* Add to queue. */ | |
33 | cds_list_add_tail(&cmd->cmd_list_node, | |
34 | &handle->cmd_queue.list); | |
35 | /* Wake-up thread. */ | |
58d3fed5 | 36 | ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe), |
ab0ee2ca | 37 | ¬ification_counter, sizeof(notification_counter)); |
58d3fed5 | 38 | if (ret != sizeof(notification_counter)) { |
ab0ee2ca JG |
39 | PERROR("write to notification thread's queue event fd"); |
40 | /* | |
41 | * Remove the command from the list so the notification | |
42 | * thread does not process it. | |
43 | */ | |
44 | cds_list_del(&cmd->cmd_list_node); | |
45 | goto error_unlock_queue; | |
46 | } | |
47 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
48 | ||
8ada111f | 49 | lttng_waiter_wait(&cmd->reply_waiter); |
ab0ee2ca JG |
50 | return 0; |
51 | error_unlock_queue: | |
52 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
53 | return -1; | |
54 | } | |
55 | ||
0ab399e0 JG |
56 | static |
57 | struct notification_thread_command *notification_thread_command_copy( | |
58 | const struct notification_thread_command *original_cmd) | |
59 | { | |
60 | struct notification_thread_command *new_cmd; | |
61 | ||
62 | new_cmd = zmalloc(sizeof(*new_cmd)); | |
63 | if (!new_cmd) { | |
64 | goto end; | |
65 | } | |
66 | ||
67 | *new_cmd = *original_cmd; | |
68 | init_notification_thread_command(new_cmd); | |
69 | end: | |
70 | return new_cmd; | |
71 | } | |
72 | ||
73 | static | |
74 | int run_command_no_wait(struct notification_thread_handle *handle, | |
75 | const struct notification_thread_command *in_cmd) | |
76 | { | |
77 | int ret; | |
78 | uint64_t notification_counter = 1; | |
79 | struct notification_thread_command *new_cmd = | |
80 | notification_thread_command_copy(in_cmd); | |
81 | ||
82 | if (!new_cmd) { | |
83 | goto error; | |
84 | } | |
85 | new_cmd->is_async = true; | |
86 | ||
87 | pthread_mutex_lock(&handle->cmd_queue.lock); | |
88 | /* Add to queue. */ | |
89 | cds_list_add_tail(&new_cmd->cmd_list_node, | |
90 | &handle->cmd_queue.list); | |
91 | /* Wake-up thread. */ | |
92 | ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe), | |
93 | ¬ification_counter, sizeof(notification_counter)); | |
94 | if (ret != sizeof(notification_counter)) { | |
95 | PERROR("write to notification thread's queue event fd"); | |
96 | /* | |
97 | * Remove the command from the list so the notification | |
98 | * thread does not process it. | |
99 | */ | |
100 | cds_list_del(&new_cmd->cmd_list_node); | |
101 | goto error_unlock_queue; | |
102 | } | |
103 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
104 | return 0; | |
105 | error_unlock_queue: | |
106 | free(new_cmd); | |
107 | pthread_mutex_unlock(&handle->cmd_queue.lock); | |
108 | error: | |
109 | return -1; | |
110 | } | |
111 | ||
ab0ee2ca JG |
112 | enum lttng_error_code notification_thread_command_register_trigger( |
113 | struct notification_thread_handle *handle, | |
114 | struct lttng_trigger *trigger) | |
115 | { | |
116 | int ret; | |
117 | enum lttng_error_code ret_code; | |
0ab399e0 | 118 | struct notification_thread_command cmd = {}; |
ab0ee2ca | 119 | |
242388e4 | 120 | assert(trigger); |
ab0ee2ca JG |
121 | init_notification_thread_command(&cmd); |
122 | ||
123 | cmd.type = NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER; | |
242388e4 | 124 | lttng_trigger_get(trigger); |
ac16173e | 125 | cmd.parameters.register_trigger.trigger = trigger; |
ab0ee2ca JG |
126 | |
127 | ret = run_command_wait(handle, &cmd); | |
128 | if (ret) { | |
129 | ret_code = LTTNG_ERR_UNK; | |
130 | goto end; | |
131 | } | |
132 | ret_code = cmd.reply_code; | |
133 | end: | |
134 | return ret_code; | |
135 | } | |
136 | ||
137 | enum lttng_error_code notification_thread_command_unregister_trigger( | |
138 | struct notification_thread_handle *handle, | |
ac16173e | 139 | const struct lttng_trigger *trigger) |
ab0ee2ca JG |
140 | { |
141 | int ret; | |
142 | enum lttng_error_code ret_code; | |
0ab399e0 | 143 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
144 | |
145 | init_notification_thread_command(&cmd); | |
146 | ||
147 | cmd.type = NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER; | |
ac16173e | 148 | cmd.parameters.unregister_trigger.trigger = trigger; |
ab0ee2ca JG |
149 | |
150 | ret = run_command_wait(handle, &cmd); | |
151 | if (ret) { | |
152 | ret_code = LTTNG_ERR_UNK; | |
153 | goto end; | |
154 | } | |
155 | ret_code = cmd.reply_code; | |
156 | end: | |
157 | return ret_code; | |
158 | } | |
159 | ||
160 | enum lttng_error_code notification_thread_command_add_channel( | |
161 | struct notification_thread_handle *handle, | |
162 | char *session_name, uid_t uid, gid_t gid, | |
163 | char *channel_name, uint64_t key, | |
164 | enum lttng_domain_type domain, uint64_t capacity) | |
165 | { | |
166 | int ret; | |
167 | enum lttng_error_code ret_code; | |
0ab399e0 | 168 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
169 | |
170 | init_notification_thread_command(&cmd); | |
171 | ||
172 | cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL; | |
8abe313a JG |
173 | cmd.parameters.add_channel.session.name = session_name; |
174 | cmd.parameters.add_channel.session.uid = uid; | |
175 | cmd.parameters.add_channel.session.gid = gid; | |
176 | cmd.parameters.add_channel.channel.name = channel_name; | |
177 | cmd.parameters.add_channel.channel.key = key; | |
178 | cmd.parameters.add_channel.channel.domain = domain; | |
179 | cmd.parameters.add_channel.channel.capacity = capacity; | |
ab0ee2ca JG |
180 | |
181 | ret = run_command_wait(handle, &cmd); | |
182 | if (ret) { | |
183 | ret_code = LTTNG_ERR_UNK; | |
184 | goto end; | |
185 | } | |
186 | ret_code = cmd.reply_code; | |
187 | end: | |
188 | return ret_code; | |
189 | } | |
190 | ||
191 | enum lttng_error_code notification_thread_command_remove_channel( | |
192 | struct notification_thread_handle *handle, | |
193 | uint64_t key, enum lttng_domain_type domain) | |
194 | { | |
195 | int ret; | |
196 | enum lttng_error_code ret_code; | |
0ab399e0 | 197 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
198 | |
199 | init_notification_thread_command(&cmd); | |
200 | ||
201 | cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL; | |
202 | cmd.parameters.remove_channel.key = key; | |
203 | cmd.parameters.remove_channel.domain = domain; | |
204 | ||
205 | ret = run_command_wait(handle, &cmd); | |
206 | if (ret) { | |
207 | ret_code = LTTNG_ERR_UNK; | |
208 | goto end; | |
209 | } | |
210 | ret_code = cmd.reply_code; | |
211 | end: | |
212 | return ret_code; | |
213 | } | |
214 | ||
731c1b12 JG |
215 | enum lttng_error_code notification_thread_command_session_rotation_ongoing( |
216 | struct notification_thread_handle *handle, | |
217 | const char *session_name, uid_t uid, gid_t gid, | |
218 | uint64_t trace_archive_chunk_id) | |
219 | { | |
220 | int ret; | |
221 | enum lttng_error_code ret_code; | |
0ab399e0 | 222 | struct notification_thread_command cmd = {}; |
731c1b12 JG |
223 | |
224 | init_notification_thread_command(&cmd); | |
225 | ||
226 | cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_ONGOING; | |
227 | cmd.parameters.session_rotation.session_name = session_name; | |
228 | cmd.parameters.session_rotation.uid = uid; | |
229 | cmd.parameters.session_rotation.gid = gid; | |
230 | cmd.parameters.session_rotation.trace_archive_chunk_id = | |
231 | trace_archive_chunk_id; | |
232 | ||
233 | ret = run_command_wait(handle, &cmd); | |
234 | if (ret) { | |
235 | ret_code = LTTNG_ERR_UNK; | |
236 | goto end; | |
237 | } | |
238 | ret_code = cmd.reply_code; | |
239 | end: | |
240 | return ret_code; | |
241 | } | |
242 | ||
243 | enum lttng_error_code notification_thread_command_session_rotation_completed( | |
244 | struct notification_thread_handle *handle, | |
245 | const char *session_name, uid_t uid, gid_t gid, | |
246 | uint64_t trace_archive_chunk_id, | |
247 | struct lttng_trace_archive_location *location) | |
248 | { | |
249 | int ret; | |
250 | enum lttng_error_code ret_code; | |
0ab399e0 | 251 | struct notification_thread_command cmd = {}; |
731c1b12 JG |
252 | |
253 | init_notification_thread_command(&cmd); | |
254 | ||
255 | cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_COMPLETED; | |
256 | cmd.parameters.session_rotation.session_name = session_name; | |
257 | cmd.parameters.session_rotation.uid = uid; | |
258 | cmd.parameters.session_rotation.gid = gid; | |
259 | cmd.parameters.session_rotation.trace_archive_chunk_id = | |
260 | trace_archive_chunk_id; | |
261 | cmd.parameters.session_rotation.location = location; | |
262 | ||
263 | ret = run_command_wait(handle, &cmd); | |
264 | if (ret) { | |
265 | ret_code = LTTNG_ERR_UNK; | |
266 | goto end; | |
267 | } | |
268 | ret_code = cmd.reply_code; | |
269 | end: | |
270 | return ret_code; | |
271 | } | |
272 | ||
d02d7404 JR |
273 | enum lttng_error_code notification_thread_command_add_tracer_event_source( |
274 | struct notification_thread_handle *handle, | |
275 | int tracer_event_source_fd, | |
276 | enum lttng_domain_type domain) | |
277 | { | |
278 | int ret; | |
279 | enum lttng_error_code ret_code; | |
280 | struct notification_thread_command cmd = {}; | |
281 | ||
282 | assert(tracer_event_source_fd >= 0); | |
283 | ||
284 | init_notification_thread_command(&cmd); | |
285 | ||
286 | cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_TRACER_EVENT_SOURCE; | |
287 | cmd.parameters.tracer_event_source.tracer_event_source_fd = | |
288 | tracer_event_source_fd; | |
289 | cmd.parameters.tracer_event_source.domain = domain; | |
290 | ||
291 | ret = run_command_wait(handle, &cmd); | |
292 | if (ret) { | |
293 | ret_code = LTTNG_ERR_UNK; | |
294 | goto end; | |
295 | } | |
296 | ||
297 | ret_code = cmd.reply_code; | |
298 | end: | |
299 | return ret_code; | |
300 | } | |
301 | ||
302 | enum lttng_error_code notification_thread_command_remove_tracer_event_source( | |
303 | struct notification_thread_handle *handle, | |
304 | int tracer_event_source_fd) | |
305 | { | |
306 | int ret; | |
307 | enum lttng_error_code ret_code; | |
308 | struct notification_thread_command cmd = {}; | |
309 | ||
310 | init_notification_thread_command(&cmd); | |
311 | ||
312 | cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_TRACER_EVENT_SOURCE; | |
313 | cmd.parameters.tracer_event_source.tracer_event_source_fd = | |
314 | tracer_event_source_fd; | |
315 | ||
316 | ret = run_command_wait(handle, &cmd); | |
317 | if (ret) { | |
318 | ret_code = LTTNG_ERR_UNK; | |
319 | goto end; | |
320 | } | |
321 | ||
322 | ret_code = cmd.reply_code; | |
323 | end: | |
324 | return ret_code; | |
325 | } | |
326 | ||
fbc9f37d JR |
327 | enum lttng_error_code notification_thread_command_list_triggers( |
328 | struct notification_thread_handle *handle, | |
329 | uid_t uid, | |
330 | struct lttng_triggers **triggers) | |
331 | { | |
332 | int ret; | |
333 | enum lttng_error_code ret_code; | |
334 | struct notification_thread_command cmd = {}; | |
335 | ||
336 | assert(handle); | |
337 | assert(triggers); | |
338 | ||
339 | init_notification_thread_command(&cmd); | |
340 | ||
341 | cmd.type = NOTIFICATION_COMMAND_TYPE_LIST_TRIGGERS; | |
342 | cmd.parameters.list_triggers.uid = uid; | |
343 | ||
344 | ret = run_command_wait(handle, &cmd); | |
345 | if (ret) { | |
346 | ret_code = LTTNG_ERR_UNK; | |
347 | goto end; | |
348 | } | |
349 | ||
350 | ret_code = cmd.reply_code; | |
351 | *triggers = cmd.reply.list_triggers.triggers; | |
352 | ||
353 | end: | |
354 | return ret_code; | |
355 | } | |
356 | ||
ab0ee2ca JG |
357 | void notification_thread_command_quit( |
358 | struct notification_thread_handle *handle) | |
359 | { | |
360 | int ret; | |
0ab399e0 | 361 | struct notification_thread_command cmd = {}; |
ab0ee2ca JG |
362 | |
363 | init_notification_thread_command(&cmd); | |
364 | ||
365 | cmd.type = NOTIFICATION_COMMAND_TYPE_QUIT; | |
366 | ret = run_command_wait(handle, &cmd); | |
367 | assert(!ret && cmd.reply_code == LTTNG_OK); | |
368 | } | |
f2b3ef9f JG |
369 | |
370 | int notification_thread_client_communication_update( | |
371 | struct notification_thread_handle *handle, | |
372 | notification_client_id id, | |
373 | enum client_transmission_status transmission_status) | |
374 | { | |
375 | struct notification_thread_command cmd = {}; | |
376 | ||
377 | init_notification_thread_command(&cmd); | |
378 | ||
379 | cmd.type = NOTIFICATION_COMMAND_TYPE_CLIENT_COMMUNICATION_UPDATE; | |
380 | cmd.parameters.client_communication_update.id = id; | |
381 | cmd.parameters.client_communication_update.status = transmission_status; | |
382 | return run_command_no_wait(handle, &cmd); | |
383 | } |