Commit | Line | Data |
---|---|---|
2f77fc4b | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2012 David Goulet <dgoulet@efficios.com> |
3 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
2f77fc4b | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: GPL-2.0-only |
2f77fc4b | 6 | * |
2f77fc4b DG |
7 | */ |
8 | ||
6c1c0768 | 9 | #define _LGPL_SOURCE |
28ab034a JG |
10 | #include "agent-thread.hpp" |
11 | #include "agent.hpp" | |
12 | #include "buffer-registry.hpp" | |
13 | #include "channel.hpp" | |
14 | #include "cmd.hpp" | |
15 | #include "consumer.hpp" | |
16 | #include "event-notifier-error-accounting.hpp" | |
17 | #include "event.hpp" | |
18 | #include "health-sessiond.hpp" | |
19 | #include "kernel-consumer.hpp" | |
20 | #include "kernel.hpp" | |
21 | #include "lttng-sessiond.hpp" | |
22 | #include "lttng-syscall.hpp" | |
23 | #include "notification-thread-commands.hpp" | |
24 | #include "notification-thread.hpp" | |
28ab034a JG |
25 | #include "rotation-thread.hpp" |
26 | #include "session.hpp" | |
27 | #include "timer.hpp" | |
28 | #include "tracker.hpp" | |
29 | #include "utils.hpp" | |
2f77fc4b | 30 | |
c9e313bc SM |
31 | #include <common/buffer-view.hpp> |
32 | #include <common/common.hpp> | |
33 | #include <common/compat/string.hpp> | |
34 | #include <common/defaults.hpp> | |
35 | #include <common/dynamic-buffer.hpp> | |
36 | #include <common/kernel-ctl/kernel-ctl.hpp> | |
37 | #include <common/payload-view.hpp> | |
38 | #include <common/payload.hpp> | |
39 | #include <common/relayd/relayd.hpp> | |
40 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
41 | #include <common/string-utils/string-utils.hpp> | |
42 | #include <common/trace-chunk.hpp> | |
56047f5a | 43 | #include <common/urcu.hpp> |
c9e313bc | 44 | #include <common/utils.hpp> |
28ab034a | 45 | |
c9e313bc | 46 | #include <lttng/action/action-internal.hpp> |
588c4b0d | 47 | #include <lttng/action/action.h> |
c9e313bc | 48 | #include <lttng/channel-internal.hpp> |
588c4b0d | 49 | #include <lttng/channel.h> |
c9e313bc | 50 | #include <lttng/condition/condition-internal.hpp> |
588c4b0d | 51 | #include <lttng/condition/condition.h> |
c9e313bc SM |
52 | #include <lttng/condition/event-rule-matches-internal.hpp> |
53 | #include <lttng/condition/event-rule-matches.h> | |
54 | #include <lttng/error-query-internal.hpp> | |
55 | #include <lttng/event-internal.hpp> | |
56 | #include <lttng/event-rule/event-rule-internal.hpp> | |
57 | #include <lttng/event-rule/event-rule.h> | |
58 | #include <lttng/location-internal.hpp> | |
59 | #include <lttng/lttng-error.h> | |
60 | #include <lttng/rotate-internal.hpp> | |
61 | #include <lttng/session-descriptor-internal.hpp> | |
62 | #include <lttng/session-internal.hpp> | |
63 | #include <lttng/tracker.h> | |
64 | #include <lttng/trigger/trigger-internal.hpp> | |
65 | #include <lttng/userspace-probe-internal.hpp> | |
2f77fc4b | 66 | |
28ab034a JG |
67 | #include <algorithm> |
68 | #include <inttypes.h> | |
69 | #include <stdio.h> | |
70 | #include <sys/stat.h> | |
71 | #include <urcu/list.h> | |
72 | #include <urcu/uatomic.h> | |
2f77fc4b | 73 | |
a503e1ef JG |
74 | /* Sleep for 100ms between each check for the shm path's deletion. */ |
75 | #define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000 | |
76 | ||
d7bfb9b0 JG |
77 | namespace lsu = lttng::sessiond::ust; |
78 | ||
f1494934 JG |
79 | static enum lttng_error_code wait_on_path(void *path); |
80 | ||
81 | namespace { | |
3e3665b8 JG |
82 | struct cmd_destroy_session_reply_context { |
83 | int reply_sock_fd; | |
84 | bool implicit_rotation_on_destroy; | |
3285a971 JG |
85 | /* |
86 | * Indicates whether or not an error occurred while launching the | |
87 | * destruction of a session. | |
88 | */ | |
89 | enum lttng_error_code destruction_status; | |
3e3665b8 JG |
90 | }; |
91 | ||
a503e1ef JG |
92 | /* |
93 | * Command completion handler that is used by the destroy command | |
94 | * when a session that has a non-default shm_path is being destroyed. | |
95 | * | |
96 | * See comment in cmd_destroy_session() for the rationale. | |
97 | */ | |
f1494934 | 98 | struct destroy_completion_handler { |
a503e1ef JG |
99 | struct cmd_completion_handler handler; |
100 | char shm_path[member_sizeof(struct ltt_session, shm_path)]; | |
101 | } destroy_completion_handler = { | |
28ab034a | 102 | .handler = { .run = wait_on_path, .data = destroy_completion_handler.shm_path }, |
a503e1ef JG |
103 | .shm_path = { 0 }, |
104 | }; | |
105 | ||
2f77fc4b DG |
106 | /* |
107 | * Used to keep a unique index for each relayd socket created where this value | |
108 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
109 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
110 | * held. | |
2f77fc4b | 111 | */ |
f1494934 JG |
112 | pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
113 | uint64_t relayd_net_seq_idx; | |
114 | } /* namespace */ | |
2f77fc4b | 115 | |
f1494934 | 116 | static struct cmd_completion_handler *current_completion_handler; |
7076b56e JG |
117 | static int validate_ust_event_name(const char *); |
118 | static int cmd_enable_event_internal(struct ltt_session *session, | |
28ab034a JG |
119 | const struct lttng_domain *domain, |
120 | char *channel_name, | |
121 | struct lttng_event *event, | |
122 | char *filter_expression, | |
123 | struct lttng_bytecode *filter, | |
124 | struct lttng_event_exclusion *exclusion, | |
125 | int wpipe); | |
126 | static enum lttng_error_code cmd_enable_channel_internal(struct ltt_session *session, | |
127 | const struct lttng_domain *domain, | |
128 | const struct lttng_channel *_attr, | |
129 | int wpipe); | |
7076b56e | 130 | |
2f77fc4b DG |
131 | /* |
132 | * Create a session path used by list_lttng_sessions for the case that the | |
133 | * session consumer is on the network. | |
134 | */ | |
28ab034a | 135 | static int build_network_session_path(char *dst, size_t size, struct ltt_session *session) |
2f77fc4b DG |
136 | { |
137 | int ret, kdata_port, udata_port; | |
cd9adb8b | 138 | struct lttng_uri *kuri = nullptr, *uuri = nullptr, *uri = nullptr; |
2f77fc4b DG |
139 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; |
140 | ||
a0377dfe FD |
141 | LTTNG_ASSERT(session); |
142 | LTTNG_ASSERT(dst); | |
2f77fc4b DG |
143 | |
144 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
145 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
146 | ||
147 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
148 | ||
149 | if (session->kernel_session && session->kernel_session->consumer) { | |
150 | kuri = &session->kernel_session->consumer->dst.net.control; | |
151 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
152 | } | |
153 | ||
154 | if (session->ust_session && session->ust_session->consumer) { | |
155 | uuri = &session->ust_session->consumer->dst.net.control; | |
156 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
157 | } | |
158 | ||
cd9adb8b | 159 | if (uuri == nullptr && kuri == nullptr) { |
2f77fc4b DG |
160 | uri = &session->consumer->dst.net.control; |
161 | kdata_port = session->consumer->dst.net.data.port; | |
162 | } else if (kuri && uuri) { | |
163 | ret = uri_compare(kuri, uuri); | |
164 | if (ret) { | |
165 | /* Not Equal */ | |
166 | uri = kuri; | |
167 | /* Build uuri URL string */ | |
168 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
169 | if (ret < 0) { | |
170 | goto error; | |
171 | } | |
172 | } else { | |
173 | uri = kuri; | |
174 | } | |
cd9adb8b | 175 | } else if (kuri && uuri == nullptr) { |
2f77fc4b | 176 | uri = kuri; |
cd9adb8b | 177 | } else if (uuri && kuri == nullptr) { |
2f77fc4b DG |
178 | uri = uuri; |
179 | } | |
180 | ||
181 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
182 | if (ret < 0) { | |
183 | goto error; | |
184 | } | |
185 | ||
9aa9f900 DG |
186 | /* |
187 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
188 | * to print. | |
189 | */ | |
9d035200 | 190 | if (*tmp_uurl != '\0') { |
28ab034a JG |
191 | ret = snprintf(dst, |
192 | size, | |
193 | "[K]: %s [data: %d] -- [U]: %s [data: %d]", | |
194 | tmp_urls, | |
195 | kdata_port, | |
196 | tmp_uurl, | |
197 | udata_port); | |
2f77fc4b | 198 | } else { |
9aa9f900 | 199 | int dport; |
bef08707 | 200 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
201 | dport = kdata_port; |
202 | } else { | |
203 | /* No kernel URI, use the UST port. */ | |
204 | dport = udata_port; | |
205 | } | |
206 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
207 | } |
208 | ||
209 | error: | |
210 | return ret; | |
211 | } | |
212 | ||
fb83fe64 JD |
213 | /* |
214 | * Get run-time attributes if the session has been started (discarded events, | |
215 | * lost packets). | |
216 | */ | |
217 | static int get_kernel_runtime_stats(struct ltt_session *session, | |
28ab034a JG |
218 | struct ltt_kernel_channel *kchan, |
219 | uint64_t *discarded_events, | |
220 | uint64_t *lost_packets) | |
fb83fe64 JD |
221 | { |
222 | int ret; | |
223 | ||
224 | if (!session->has_been_started) { | |
225 | ret = 0; | |
226 | *discarded_events = 0; | |
227 | *lost_packets = 0; | |
228 | goto end; | |
229 | } | |
230 | ||
28ab034a JG |
231 | ret = consumer_get_discarded_events( |
232 | session->id, kchan->key, session->kernel_session->consumer, discarded_events); | |
fb83fe64 JD |
233 | if (ret < 0) { |
234 | goto end; | |
235 | } | |
236 | ||
28ab034a JG |
237 | ret = consumer_get_lost_packets( |
238 | session->id, kchan->key, session->kernel_session->consumer, lost_packets); | |
fb83fe64 JD |
239 | if (ret < 0) { |
240 | goto end; | |
241 | } | |
242 | ||
243 | end: | |
244 | return ret; | |
245 | } | |
246 | ||
247 | /* | |
248 | * Get run-time attributes if the session has been started (discarded events, | |
249 | * lost packets). | |
250 | */ | |
251 | static int get_ust_runtime_stats(struct ltt_session *session, | |
28ab034a JG |
252 | struct ltt_ust_channel *uchan, |
253 | uint64_t *discarded_events, | |
254 | uint64_t *lost_packets) | |
fb83fe64 JD |
255 | { |
256 | int ret; | |
257 | struct ltt_ust_session *usess; | |
258 | ||
a91c5803 JG |
259 | if (!discarded_events || !lost_packets) { |
260 | ret = -1; | |
261 | goto end; | |
262 | } | |
263 | ||
fb83fe64 | 264 | usess = session->ust_session; |
a0377dfe FD |
265 | LTTNG_ASSERT(discarded_events); |
266 | LTTNG_ASSERT(lost_packets); | |
fb83fe64 JD |
267 | |
268 | if (!usess || !session->has_been_started) { | |
269 | *discarded_events = 0; | |
270 | *lost_packets = 0; | |
271 | ret = 0; | |
272 | goto end; | |
273 | } | |
274 | ||
275 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
276 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
28ab034a JG |
277 | &usess->buffer_reg_uid_list, |
278 | usess->consumer, | |
279 | uchan->id, | |
280 | uchan->attr.overwrite, | |
281 | discarded_events, | |
282 | lost_packets); | |
fb83fe64 JD |
283 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { |
284 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
28ab034a JG |
285 | uchan, |
286 | usess->consumer, | |
287 | uchan->attr.overwrite, | |
288 | discarded_events, | |
289 | lost_packets); | |
fb83fe64 JD |
290 | if (ret < 0) { |
291 | goto end; | |
292 | } | |
293 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
294 | *lost_packets += uchan->per_pid_closed_app_lost; | |
295 | } else { | |
296 | ERR("Unsupported buffer type"); | |
a0377dfe | 297 | abort(); |
fb83fe64 JD |
298 | ret = -1; |
299 | goto end; | |
300 | } | |
301 | ||
302 | end: | |
303 | return ret; | |
304 | } | |
305 | ||
3c6a091f | 306 | /* |
022d91ba | 307 | * Create a list of agent domain events. |
3c6a091f DG |
308 | * |
309 | * Return number of events in list on success or else a negative value. | |
310 | */ | |
28ab034a JG |
311 | static enum lttng_error_code list_lttng_agent_events(struct agent *agt, |
312 | struct lttng_payload *reply_payload, | |
313 | unsigned int *nb_events) | |
3c6a091f | 314 | { |
8ddd72ef JR |
315 | enum lttng_error_code ret_code; |
316 | int ret = 0; | |
317 | unsigned int local_nb_events = 0; | |
318 | struct agent_event *event; | |
3c6a091f | 319 | struct lttng_ht_iter iter; |
8ddd72ef | 320 | unsigned long agent_event_count; |
3c6a091f | 321 | |
8ddd72ef JR |
322 | assert(agt); |
323 | assert(reply_payload); | |
3c6a091f | 324 | |
022d91ba | 325 | DBG3("Listing agent events"); |
3c6a091f | 326 | |
8ddd72ef JR |
327 | agent_event_count = lttng_ht_get_count(agt->events); |
328 | if (agent_event_count == 0) { | |
329 | /* Early exit. */ | |
330 | goto end; | |
331 | } | |
7966af57 | 332 | |
8ddd72ef JR |
333 | if (agent_event_count > UINT_MAX) { |
334 | ret_code = LTTNG_ERR_OVERFLOW; | |
335 | goto error; | |
336 | } | |
e368fb43 | 337 | |
8ddd72ef | 338 | local_nb_events = (unsigned int) agent_event_count; |
e368fb43 | 339 | |
56047f5a JG |
340 | { |
341 | lttng::urcu::read_lock_guard read_lock; | |
8ddd72ef | 342 | |
56047f5a JG |
343 | cds_lfht_for_each_entry (agt->events->ht, &iter.iter, event, node.node) { |
344 | struct lttng_event *tmp_event = lttng_event_create(); | |
b4e3ceb9 | 345 | |
56047f5a JG |
346 | if (!tmp_event) { |
347 | ret_code = LTTNG_ERR_NOMEM; | |
348 | goto error; | |
349 | } | |
28ab034a | 350 | |
56047f5a JG |
351 | if (lttng_strncpy(tmp_event->name, event->name, sizeof(tmp_event->name))) { |
352 | lttng_event_destroy(tmp_event); | |
353 | ret_code = LTTNG_ERR_FATAL; | |
354 | goto error; | |
355 | } | |
3c6a091f | 356 | |
56047f5a JG |
357 | tmp_event->name[sizeof(tmp_event->name) - 1] = '\0'; |
358 | tmp_event->enabled = !!event->enabled_count; | |
359 | tmp_event->loglevel = event->loglevel_value; | |
360 | tmp_event->loglevel_type = event->loglevel_type; | |
361 | ||
362 | ret = lttng_event_serialize(tmp_event, | |
363 | 0, | |
364 | nullptr, | |
365 | event->filter_expression, | |
366 | 0, | |
367 | nullptr, | |
368 | reply_payload); | |
369 | lttng_event_destroy(tmp_event); | |
370 | if (ret) { | |
371 | ret_code = LTTNG_ERR_FATAL; | |
372 | goto error; | |
373 | } | |
3c02e545 | 374 | } |
3c6a091f | 375 | } |
47e52862 | 376 | end: |
8ddd72ef JR |
377 | ret_code = LTTNG_OK; |
378 | *nb_events = local_nb_events; | |
379 | error: | |
8ddd72ef | 380 | return ret_code; |
3c6a091f DG |
381 | } |
382 | ||
2f77fc4b DG |
383 | /* |
384 | * Create a list of ust global domain events. | |
385 | */ | |
8ddd72ef | 386 | static enum lttng_error_code list_lttng_ust_global_events(char *channel_name, |
28ab034a JG |
387 | struct ltt_ust_domain_global *ust_global, |
388 | struct lttng_payload *reply_payload, | |
389 | unsigned int *nb_events) | |
2f77fc4b | 390 | { |
8ddd72ef JR |
391 | enum lttng_error_code ret_code; |
392 | int ret; | |
2f77fc4b | 393 | struct lttng_ht_iter iter; |
8ddd72ef JR |
394 | struct lttng_ht_node_str *node; |
395 | struct ltt_ust_channel *uchan; | |
396 | struct ltt_ust_event *uevent; | |
397 | unsigned long channel_event_count; | |
398 | unsigned int local_nb_events = 0; | |
399 | ||
400 | assert(reply_payload); | |
401 | assert(nb_events); | |
2f77fc4b DG |
402 | |
403 | DBG("Listing UST global events for channel %s", channel_name); | |
404 | ||
56047f5a | 405 | lttng::urcu::read_lock_guard read_lock; |
2f77fc4b | 406 | |
e368fb43 | 407 | lttng_ht_lookup(ust_global->channels, (void *) channel_name, &iter); |
2f77fc4b | 408 | node = lttng_ht_iter_get_node_str(&iter); |
cd9adb8b | 409 | if (node == nullptr) { |
8ddd72ef | 410 | ret_code = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
e68d8bdb | 411 | goto error; |
2f77fc4b DG |
412 | } |
413 | ||
414 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
415 | ||
8ddd72ef JR |
416 | channel_event_count = lttng_ht_get_count(uchan->events); |
417 | if (channel_event_count == 0) { | |
418 | /* Early exit. */ | |
419 | ret_code = LTTNG_OK; | |
420 | goto end; | |
421 | } | |
422 | ||
423 | if (channel_event_count > UINT_MAX) { | |
424 | ret_code = LTTNG_ERR_OVERFLOW; | |
425 | goto error; | |
426 | } | |
427 | ||
428 | local_nb_events = (unsigned int) channel_event_count; | |
429 | ||
430 | DBG3("Listing UST global %d events", *nb_events); | |
2f77fc4b | 431 | |
28ab034a | 432 | cds_lfht_for_each_entry (uchan->events->ht, &iter.iter, uevent, node.node) { |
cd9adb8b | 433 | struct lttng_event *tmp_event = nullptr; |
e368fb43 | 434 | |
b4e3ceb9 | 435 | if (uevent->internal) { |
8ddd72ef JR |
436 | /* This event should remain hidden from clients */ |
437 | local_nb_events--; | |
b4e3ceb9 PP |
438 | continue; |
439 | } | |
440 | ||
8ddd72ef JR |
441 | tmp_event = lttng_event_create(); |
442 | if (!tmp_event) { | |
443 | ret_code = LTTNG_ERR_NOMEM; | |
e68d8bdb | 444 | goto error; |
43ed1485 | 445 | } |
2f77fc4b | 446 | |
28ab034a | 447 | if (lttng_strncpy(tmp_event->name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN)) { |
8ddd72ef JR |
448 | ret_code = LTTNG_ERR_FATAL; |
449 | lttng_event_destroy(tmp_event); | |
e68d8bdb | 450 | goto error; |
8ddd72ef JR |
451 | } |
452 | ||
453 | tmp_event->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
454 | tmp_event->enabled = uevent->enabled; | |
2f77fc4b DG |
455 | |
456 | switch (uevent->attr.instrumentation) { | |
fc4b93fa | 457 | case LTTNG_UST_ABI_TRACEPOINT: |
8ddd72ef | 458 | tmp_event->type = LTTNG_EVENT_TRACEPOINT; |
2f77fc4b | 459 | break; |
fc4b93fa | 460 | case LTTNG_UST_ABI_PROBE: |
8ddd72ef | 461 | tmp_event->type = LTTNG_EVENT_PROBE; |
2f77fc4b | 462 | break; |
fc4b93fa | 463 | case LTTNG_UST_ABI_FUNCTION: |
8ddd72ef | 464 | tmp_event->type = LTTNG_EVENT_FUNCTION; |
2f77fc4b DG |
465 | break; |
466 | } | |
467 | ||
8ddd72ef | 468 | tmp_event->loglevel = uevent->attr.loglevel; |
2f77fc4b | 469 | switch (uevent->attr.loglevel_type) { |
fc4b93fa | 470 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
8ddd72ef | 471 | tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
2f77fc4b | 472 | break; |
fc4b93fa | 473 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
8ddd72ef | 474 | tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
2f77fc4b | 475 | break; |
fc4b93fa | 476 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
8ddd72ef | 477 | tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
2f77fc4b DG |
478 | break; |
479 | } | |
480 | if (uevent->filter) { | |
8ddd72ef | 481 | tmp_event->filter = 1; |
2f77fc4b | 482 | } |
4634f12e | 483 | if (uevent->exclusion) { |
8ddd72ef | 484 | tmp_event->exclusion = 1; |
4634f12e | 485 | } |
b4e3ceb9 | 486 | |
dd7ef124 JG |
487 | std::vector<const char *> exclusion_names; |
488 | if (uevent->exclusion) { | |
489 | for (int i = 0; i < uevent->exclusion->count; i++) { | |
490 | exclusion_names.emplace_back( | |
491 | LTTNG_EVENT_EXCLUSION_NAME_AT(uevent->exclusion, i)); | |
492 | } | |
493 | } | |
494 | ||
8ddd72ef JR |
495 | /* |
496 | * We do not care about the filter bytecode and the fd from the | |
497 | * userspace_probe_location. | |
498 | */ | |
dd7ef124 JG |
499 | ret = lttng_event_serialize( |
500 | tmp_event, | |
501 | exclusion_names.size(), | |
502 | exclusion_names.size() ? | |
503 | exclusion_names.data() : | |
504 | nullptr, | |
505 | uevent->filter_expression, | |
506 | 0, | |
507 | nullptr, | |
508 | reply_payload); | |
8ddd72ef | 509 | lttng_event_destroy(tmp_event); |
3c02e545 | 510 | if (ret) { |
8ddd72ef JR |
511 | ret_code = LTTNG_ERR_FATAL; |
512 | goto error; | |
3c02e545 | 513 | } |
2f77fc4b DG |
514 | } |
515 | ||
d31d3e8c | 516 | end: |
8ddd72ef JR |
517 | /* nb_events is already set at this point. */ |
518 | ret_code = LTTNG_OK; | |
519 | *nb_events = local_nb_events; | |
520 | error: | |
8ddd72ef | 521 | return ret_code; |
2f77fc4b DG |
522 | } |
523 | ||
524 | /* | |
525 | * Fill lttng_event array of all kernel events in the channel. | |
526 | */ | |
8ddd72ef | 527 | static enum lttng_error_code list_lttng_kernel_events(char *channel_name, |
28ab034a JG |
528 | struct ltt_kernel_session *kernel_session, |
529 | struct lttng_payload *reply_payload, | |
530 | unsigned int *nb_events) | |
2f77fc4b | 531 | { |
8ddd72ef | 532 | enum lttng_error_code ret_code; |
e368fb43 | 533 | int ret; |
8ddd72ef JR |
534 | struct ltt_kernel_event *event; |
535 | struct ltt_kernel_channel *kchan; | |
536 | ||
537 | assert(reply_payload); | |
2f77fc4b DG |
538 | |
539 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
cd9adb8b | 540 | if (kchan == nullptr) { |
8ddd72ef JR |
541 | ret_code = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
542 | goto end; | |
2f77fc4b DG |
543 | } |
544 | ||
8ddd72ef | 545 | *nb_events = kchan->event_count; |
2f77fc4b DG |
546 | |
547 | DBG("Listing events for channel %s", kchan->channel->name); | |
548 | ||
8ddd72ef JR |
549 | if (*nb_events == 0) { |
550 | ret_code = LTTNG_OK; | |
551 | goto end; | |
552 | } | |
553 | ||
e368fb43 | 554 | /* Kernel channels */ |
28ab034a | 555 | cds_list_for_each_entry (event, &kchan->events_list.head, list) { |
8ddd72ef | 556 | struct lttng_event *tmp_event = lttng_event_create(); |
2f77fc4b | 557 | |
8ddd72ef JR |
558 | if (!tmp_event) { |
559 | ret_code = LTTNG_ERR_NOMEM; | |
560 | goto end; | |
561 | } | |
562 | ||
563 | if (lttng_strncpy(tmp_event->name, event->event->name, LTTNG_SYMBOL_NAME_LEN)) { | |
564 | lttng_event_destroy(tmp_event); | |
565 | ret_code = LTTNG_ERR_FATAL; | |
43ed1485 JG |
566 | goto end; |
567 | } | |
568 | ||
8ddd72ef JR |
569 | tmp_event->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
570 | tmp_event->enabled = event->enabled; | |
571 | tmp_event->filter = (unsigned char) !!event->filter_expression; | |
b4e3ceb9 | 572 | |
8ddd72ef | 573 | switch (event->event->instrumentation) { |
b8e2fb80 | 574 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
8ddd72ef | 575 | tmp_event->type = LTTNG_EVENT_TRACEPOINT; |
2f77fc4b | 576 | break; |
b8e2fb80 | 577 | case LTTNG_KERNEL_ABI_KRETPROBE: |
8ddd72ef | 578 | tmp_event->type = LTTNG_EVENT_FUNCTION; |
28ab034a JG |
579 | memcpy(&tmp_event->attr.probe, |
580 | &event->event->u.kprobe, | |
581 | sizeof(struct lttng_kernel_abi_kprobe)); | |
1896972b | 582 | break; |
b8e2fb80 | 583 | case LTTNG_KERNEL_ABI_KPROBE: |
8ddd72ef | 584 | tmp_event->type = LTTNG_EVENT_PROBE; |
28ab034a JG |
585 | memcpy(&tmp_event->attr.probe, |
586 | &event->event->u.kprobe, | |
587 | sizeof(struct lttng_kernel_abi_kprobe)); | |
2f77fc4b | 588 | break; |
b8e2fb80 | 589 | case LTTNG_KERNEL_ABI_UPROBE: |
8ddd72ef | 590 | tmp_event->type = LTTNG_EVENT_USERSPACE_PROBE; |
b955b4d4 | 591 | break; |
b8e2fb80 | 592 | case LTTNG_KERNEL_ABI_FUNCTION: |
8ddd72ef | 593 | tmp_event->type = LTTNG_EVENT_FUNCTION; |
28ab034a JG |
594 | memcpy(&(tmp_event->attr.ftrace), |
595 | &event->event->u.ftrace, | |
596 | sizeof(struct lttng_kernel_abi_function)); | |
2f77fc4b | 597 | break; |
b8e2fb80 | 598 | case LTTNG_KERNEL_ABI_NOOP: |
8ddd72ef | 599 | tmp_event->type = LTTNG_EVENT_NOOP; |
2f77fc4b | 600 | break; |
b8e2fb80 | 601 | case LTTNG_KERNEL_ABI_SYSCALL: |
8ddd72ef | 602 | tmp_event->type = LTTNG_EVENT_SYSCALL; |
2f77fc4b | 603 | break; |
b8e2fb80 | 604 | case LTTNG_KERNEL_ABI_ALL: |
1ab8c2ad FD |
605 | /* fall-through. */ |
606 | default: | |
a0377dfe | 607 | abort(); |
2f77fc4b DG |
608 | break; |
609 | } | |
b4e3ceb9 | 610 | |
8ddd72ef JR |
611 | if (event->userspace_probe_location) { |
612 | struct lttng_userspace_probe_location *location_copy = | |
28ab034a JG |
613 | lttng_userspace_probe_location_copy( |
614 | event->userspace_probe_location); | |
8ddd72ef JR |
615 | |
616 | if (!location_copy) { | |
617 | lttng_event_destroy(tmp_event); | |
618 | ret_code = LTTNG_ERR_NOMEM; | |
619 | goto end; | |
620 | } | |
621 | ||
28ab034a | 622 | ret = lttng_event_set_userspace_probe_location(tmp_event, location_copy); |
8ddd72ef JR |
623 | if (ret) { |
624 | lttng_event_destroy(tmp_event); | |
28ab034a | 625 | lttng_userspace_probe_location_destroy(location_copy); |
8ddd72ef JR |
626 | ret_code = LTTNG_ERR_INVALID; |
627 | goto end; | |
628 | } | |
e368fb43 | 629 | } |
e368fb43 | 630 | |
28ab034a | 631 | ret = lttng_event_serialize( |
cd9adb8b | 632 | tmp_event, 0, nullptr, event->filter_expression, 0, nullptr, reply_payload); |
8ddd72ef | 633 | lttng_event_destroy(tmp_event); |
3c02e545 | 634 | if (ret) { |
8ddd72ef JR |
635 | ret_code = LTTNG_ERR_FATAL; |
636 | goto end; | |
3c02e545 | 637 | } |
2f77fc4b DG |
638 | } |
639 | ||
8ddd72ef | 640 | ret_code = LTTNG_OK; |
db906c12 | 641 | end: |
8ddd72ef | 642 | return ret_code; |
2f77fc4b DG |
643 | } |
644 | ||
645 | /* | |
646 | * Add URI so the consumer output object. Set the correct path depending on the | |
647 | * domain adding the default trace directory. | |
648 | */ | |
28ab034a JG |
649 | static enum lttng_error_code add_uri_to_consumer(const struct ltt_session *session, |
650 | struct consumer_output *consumer, | |
651 | struct lttng_uri *uri, | |
652 | enum lttng_domain_type domain) | |
2f77fc4b | 653 | { |
b178f53e JG |
654 | int ret; |
655 | enum lttng_error_code ret_code = LTTNG_OK; | |
2f77fc4b | 656 | |
a0377dfe | 657 | LTTNG_ASSERT(uri); |
2f77fc4b | 658 | |
cd9adb8b | 659 | if (consumer == nullptr) { |
2f77fc4b | 660 | DBG("No consumer detected. Don't add URI. Stopping."); |
b178f53e | 661 | ret_code = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
662 | goto error; |
663 | } | |
664 | ||
665 | switch (domain) { | |
666 | case LTTNG_DOMAIN_KERNEL: | |
b178f53e | 667 | ret = lttng_strncpy(consumer->domain_subdir, |
28ab034a JG |
668 | DEFAULT_KERNEL_TRACE_DIR, |
669 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
670 | break; |
671 | case LTTNG_DOMAIN_UST: | |
b178f53e | 672 | ret = lttng_strncpy(consumer->domain_subdir, |
28ab034a JG |
673 | DEFAULT_UST_TRACE_DIR, |
674 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
675 | break; |
676 | default: | |
677 | /* | |
b178f53e JG |
678 | * This case is possible is we try to add the URI to the global |
679 | * tracing session consumer object which in this case there is | |
680 | * no subdir. | |
2f77fc4b | 681 | */ |
28ab034a | 682 | memset(consumer->domain_subdir, 0, sizeof(consumer->domain_subdir)); |
b178f53e JG |
683 | ret = 0; |
684 | } | |
685 | if (ret) { | |
686 | ERR("Failed to initialize consumer output domain subdirectory"); | |
687 | ret_code = LTTNG_ERR_FATAL; | |
688 | goto error; | |
2f77fc4b DG |
689 | } |
690 | ||
691 | switch (uri->dtype) { | |
692 | case LTTNG_DST_IPV4: | |
693 | case LTTNG_DST_IPV6: | |
694 | DBG2("Setting network URI to consumer"); | |
695 | ||
df75acac DG |
696 | if (consumer->type == CONSUMER_DST_NET) { |
697 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
28ab034a JG |
698 | consumer->dst.net.control_isset) || |
699 | (uri->stype == LTTNG_STREAM_DATA && consumer->dst.net.data_isset)) { | |
b178f53e | 700 | ret_code = LTTNG_ERR_URL_EXIST; |
df75acac DG |
701 | goto error; |
702 | } | |
703 | } else { | |
b178f53e | 704 | memset(&consumer->dst, 0, sizeof(consumer->dst)); |
785d2d0d DG |
705 | } |
706 | ||
2f77fc4b | 707 | /* Set URI into consumer output object */ |
b178f53e | 708 | ret = consumer_set_network_uri(session, consumer, uri); |
2f77fc4b | 709 | if (ret < 0) { |
7966af57 | 710 | ret_code = (lttng_error_code) -ret; |
2f77fc4b DG |
711 | goto error; |
712 | } else if (ret == 1) { | |
713 | /* | |
714 | * URI was the same in the consumer so we do not append the subdir | |
715 | * again so to not duplicate output dir. | |
716 | */ | |
b178f53e | 717 | ret_code = LTTNG_OK; |
2f77fc4b DG |
718 | goto error; |
719 | } | |
2f77fc4b DG |
720 | break; |
721 | case LTTNG_DST_PATH: | |
b178f53e JG |
722 | if (*uri->dst.path != '/' || strstr(uri->dst.path, "../")) { |
723 | ret_code = LTTNG_ERR_INVALID; | |
9ac05d92 MD |
724 | goto error; |
725 | } | |
28ab034a | 726 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); |
b178f53e JG |
727 | memset(&consumer->dst, 0, sizeof(consumer->dst)); |
728 | ||
729 | ret = lttng_strncpy(consumer->dst.session_root_path, | |
28ab034a JG |
730 | uri->dst.path, |
731 | sizeof(consumer->dst.session_root_path)); | |
4df41cad JG |
732 | if (ret) { |
733 | ret_code = LTTNG_ERR_FATAL; | |
734 | goto error; | |
735 | } | |
2f77fc4b DG |
736 | consumer->type = CONSUMER_DST_LOCAL; |
737 | break; | |
738 | } | |
739 | ||
b178f53e | 740 | ret_code = LTTNG_OK; |
2f77fc4b | 741 | error: |
b178f53e | 742 | return ret_code; |
2f77fc4b DG |
743 | } |
744 | ||
745 | /* | |
746 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
747 | */ | |
748 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
749 | { | |
750 | int ret = 0; | |
751 | struct lttng_ht_iter iter; | |
752 | struct consumer_socket *socket; | |
753 | ||
a0377dfe | 754 | LTTNG_ASSERT(session); |
2f77fc4b | 755 | |
cd9adb8b | 756 | if (session->consumer_fds_sent == 0 && session->consumer != nullptr) { |
56047f5a JG |
757 | lttng::urcu::read_lock_guard read_lock; |
758 | ||
28ab034a JG |
759 | cds_lfht_for_each_entry ( |
760 | session->consumer->socks->ht, &iter.iter, socket, node.node) { | |
2f77fc4b | 761 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 762 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
763 | pthread_mutex_unlock(socket->lock); |
764 | if (ret < 0) { | |
f73fabfd | 765 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
766 | goto error; |
767 | } | |
768 | } | |
769 | } | |
770 | ||
771 | error: | |
772 | return ret; | |
773 | } | |
774 | ||
775 | /* | |
776 | * Create a socket to the relayd using the URI. | |
777 | * | |
778 | * On success, the relayd_sock pointer is set to the created socket. | |
9a654598 | 779 | * Else, it remains untouched and an LTTng error code is returned. |
2f77fc4b | 780 | */ |
9a654598 | 781 | static enum lttng_error_code create_connect_relayd(struct lttng_uri *uri, |
28ab034a JG |
782 | struct lttcomm_relayd_sock **relayd_sock, |
783 | struct consumer_output *consumer) | |
2f77fc4b DG |
784 | { |
785 | int ret; | |
9a654598 | 786 | enum lttng_error_code status = LTTNG_OK; |
6151a90f | 787 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 788 | |
28ab034a JG |
789 | rsock = lttcomm_alloc_relayd_sock( |
790 | uri, RELAYD_VERSION_COMM_MAJOR, RELAYD_VERSION_COMM_MINOR); | |
6151a90f | 791 | if (!rsock) { |
9a654598 | 792 | status = LTTNG_ERR_FATAL; |
2f77fc4b DG |
793 | goto error; |
794 | } | |
795 | ||
ffe60014 DG |
796 | /* |
797 | * Connect to relayd so we can proceed with a session creation. This call | |
798 | * can possibly block for an arbitrary amount of time to set the health | |
799 | * state to be in poll execution. | |
800 | */ | |
801 | health_poll_entry(); | |
6151a90f | 802 | ret = relayd_connect(rsock); |
ffe60014 | 803 | health_poll_exit(); |
2f77fc4b DG |
804 | if (ret < 0) { |
805 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 806 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
807 | goto free_sock; |
808 | } | |
809 | ||
810 | /* Create socket for control stream. */ | |
811 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
eacb7b6f MD |
812 | uint64_t result_flags; |
813 | ||
2f77fc4b DG |
814 | DBG3("Creating relayd stream socket from URI"); |
815 | ||
816 | /* Check relayd version */ | |
6151a90f | 817 | ret = relayd_version_check(rsock); |
67d5aa28 | 818 | if (ret == LTTNG_ERR_RELAYD_VERSION_FAIL) { |
9a654598 | 819 | status = LTTNG_ERR_RELAYD_VERSION_FAIL; |
67d5aa28 JD |
820 | goto close_sock; |
821 | } else if (ret < 0) { | |
822 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 823 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
824 | goto close_sock; |
825 | } | |
b31610f2 JD |
826 | consumer->relay_major_version = rsock->major; |
827 | consumer->relay_minor_version = rsock->minor; | |
28ab034a | 828 | ret = relayd_get_configuration(rsock, 0, &result_flags); |
eacb7b6f MD |
829 | if (ret < 0) { |
830 | ERR("Unable to get relayd configuration"); | |
831 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; | |
832 | goto close_sock; | |
833 | } | |
834 | if (result_flags & LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED) { | |
835 | consumer->relay_allows_clear = true; | |
836 | } | |
2f77fc4b DG |
837 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
838 | DBG3("Creating relayd data socket from URI"); | |
839 | } else { | |
840 | /* Command is not valid */ | |
841 | ERR("Relayd invalid stream type: %d", uri->stype); | |
9a654598 | 842 | status = LTTNG_ERR_INVALID; |
2f77fc4b DG |
843 | goto close_sock; |
844 | } | |
845 | ||
6151a90f | 846 | *relayd_sock = rsock; |
2f77fc4b | 847 | |
9a654598 | 848 | return status; |
2f77fc4b DG |
849 | |
850 | close_sock: | |
6151a90f JD |
851 | /* The returned value is not useful since we are on an error path. */ |
852 | (void) relayd_close(rsock); | |
2f77fc4b | 853 | free_sock: |
6151a90f | 854 | free(rsock); |
2f77fc4b | 855 | error: |
9a654598 | 856 | return status; |
2f77fc4b DG |
857 | } |
858 | ||
859 | /* | |
860 | * Connect to the relayd using URI and send the socket to the right consumer. | |
43fade62 JG |
861 | * |
862 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
863 | * |
864 | * Returns LTTNG_OK on success or an LTTng error code on failure. | |
2f77fc4b | 865 | */ |
28ab034a JG |
866 | static enum lttng_error_code send_consumer_relayd_socket(unsigned int session_id, |
867 | struct lttng_uri *relayd_uri, | |
868 | struct consumer_output *consumer, | |
869 | struct consumer_socket *consumer_sock, | |
870 | const char *session_name, | |
871 | const char *hostname, | |
872 | const char *base_path, | |
873 | int session_live_timer, | |
874 | const uint64_t *current_chunk_id, | |
875 | time_t session_creation_time, | |
876 | bool session_name_contains_creation_time) | |
2f77fc4b DG |
877 | { |
878 | int ret; | |
cd9adb8b | 879 | struct lttcomm_relayd_sock *rsock = nullptr; |
9a654598 | 880 | enum lttng_error_code status; |
2f77fc4b | 881 | |
ffe60014 | 882 | /* Connect to relayd and make version check if uri is the control. */ |
9a654598 JG |
883 | status = create_connect_relayd(relayd_uri, &rsock, consumer); |
884 | if (status != LTTNG_OK) { | |
9e218353 | 885 | goto relayd_comm_error; |
ffe60014 | 886 | } |
a0377dfe | 887 | LTTNG_ASSERT(rsock); |
ffe60014 | 888 | |
2f77fc4b | 889 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
890 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
891 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
892 | /* |
893 | * Increment net_seq_idx because we are about to transfer the | |
894 | * new relayd socket to the consumer. | |
d88aee68 | 895 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 896 | */ |
d88aee68 DG |
897 | consumer->net_seq_index = ++relayd_net_seq_idx; |
898 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
899 | } |
900 | ||
2f77fc4b | 901 | /* Send relayd socket to consumer. */ |
28ab034a JG |
902 | ret = consumer_send_relayd_socket(consumer_sock, |
903 | rsock, | |
904 | consumer, | |
905 | relayd_uri->stype, | |
906 | session_id, | |
907 | session_name, | |
908 | hostname, | |
909 | base_path, | |
910 | session_live_timer, | |
911 | current_chunk_id, | |
912 | session_creation_time, | |
913 | session_name_contains_creation_time); | |
2f77fc4b | 914 | if (ret < 0) { |
9a654598 | 915 | status = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
916 | goto close_sock; |
917 | } | |
918 | ||
c890b720 DG |
919 | /* Flag that the corresponding socket was sent. */ |
920 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 921 | consumer_sock->control_sock_sent = 1; |
c890b720 | 922 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 923 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
924 | } |
925 | ||
2f77fc4b DG |
926 | /* |
927 | * Close socket which was dup on the consumer side. The session daemon does | |
928 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
929 | */ | |
930 | ||
931 | close_sock: | |
9a654598 | 932 | if (status != LTTNG_OK) { |
ffe60014 | 933 | /* |
d9078d0c DG |
934 | * The consumer output for this session should not be used anymore |
935 | * since the relayd connection failed thus making any tracing or/and | |
936 | * streaming not usable. | |
ffe60014 | 937 | */ |
66cefebd | 938 | consumer->enabled = false; |
ffe60014 | 939 | } |
9e218353 JR |
940 | (void) relayd_close(rsock); |
941 | free(rsock); | |
942 | ||
943 | relayd_comm_error: | |
9a654598 | 944 | return status; |
2f77fc4b DG |
945 | } |
946 | ||
947 | /* | |
948 | * Send both relayd sockets to a specific consumer and domain. This is a | |
949 | * helper function to facilitate sending the information to the consumer for a | |
950 | * session. | |
43fade62 JG |
951 | * |
952 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
953 | * |
954 | * Returns LTTNG_OK, or an LTTng error code on failure. | |
2f77fc4b | 955 | */ |
28ab034a JG |
956 | static enum lttng_error_code send_consumer_relayd_sockets(unsigned int session_id, |
957 | struct consumer_output *consumer, | |
958 | struct consumer_socket *sock, | |
959 | const char *session_name, | |
960 | const char *hostname, | |
961 | const char *base_path, | |
962 | int session_live_timer, | |
963 | const uint64_t *current_chunk_id, | |
964 | time_t session_creation_time, | |
965 | bool session_name_contains_creation_time) | |
2f77fc4b | 966 | { |
9a654598 | 967 | enum lttng_error_code status = LTTNG_OK; |
2f77fc4b | 968 | |
a0377dfe FD |
969 | LTTNG_ASSERT(consumer); |
970 | LTTNG_ASSERT(sock); | |
2f77fc4b | 971 | |
2f77fc4b | 972 | /* Sending control relayd socket. */ |
ffe60014 | 973 | if (!sock->control_sock_sent) { |
9a654598 | 974 | status = send_consumer_relayd_socket(session_id, |
28ab034a JG |
975 | &consumer->dst.net.control, |
976 | consumer, | |
977 | sock, | |
978 | session_name, | |
979 | hostname, | |
980 | base_path, | |
981 | session_live_timer, | |
982 | current_chunk_id, | |
983 | session_creation_time, | |
984 | session_name_contains_creation_time); | |
9a654598 | 985 | if (status != LTTNG_OK) { |
c890b720 DG |
986 | goto error; |
987 | } | |
2f77fc4b DG |
988 | } |
989 | ||
990 | /* Sending data relayd socket. */ | |
ffe60014 | 991 | if (!sock->data_sock_sent) { |
9a654598 | 992 | status = send_consumer_relayd_socket(session_id, |
28ab034a JG |
993 | &consumer->dst.net.data, |
994 | consumer, | |
995 | sock, | |
996 | session_name, | |
997 | hostname, | |
998 | base_path, | |
999 | session_live_timer, | |
1000 | current_chunk_id, | |
1001 | session_creation_time, | |
1002 | session_name_contains_creation_time); | |
9a654598 | 1003 | if (status != LTTNG_OK) { |
c890b720 DG |
1004 | goto error; |
1005 | } | |
2f77fc4b DG |
1006 | } |
1007 | ||
2f77fc4b | 1008 | error: |
9a654598 | 1009 | return status; |
2f77fc4b DG |
1010 | } |
1011 | ||
1012 | /* | |
1013 | * Setup relayd connections for a tracing session. First creates the socket to | |
1014 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
1015 | * network. | |
1016 | */ | |
ffe60014 | 1017 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 1018 | { |
f73fabfd | 1019 | int ret = LTTNG_OK; |
2f77fc4b DG |
1020 | struct ltt_ust_session *usess; |
1021 | struct ltt_kernel_session *ksess; | |
1022 | struct consumer_socket *socket; | |
1023 | struct lttng_ht_iter iter; | |
0e270a1e | 1024 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
2f77fc4b | 1025 | |
a0377dfe | 1026 | LTTNG_ASSERT(session); |
2f77fc4b DG |
1027 | |
1028 | usess = session->ust_session; | |
1029 | ksess = session->kernel_session; | |
1030 | ||
785d2d0d | 1031 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1032 | |
1e791a74 JG |
1033 | if (session->current_trace_chunk) { |
1034 | enum lttng_trace_chunk_status status = lttng_trace_chunk_get_id( | |
28ab034a | 1035 | session->current_trace_chunk, ¤t_chunk_id.value); |
1e791a74 JG |
1036 | |
1037 | if (status == LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1038 | current_chunk_id.is_set = true; | |
1039 | } else { | |
1040 | ERR("Failed to get current trace chunk id"); | |
1041 | ret = LTTNG_ERR_UNK; | |
1042 | goto error; | |
1043 | } | |
1044 | } | |
1045 | ||
28ab034a JG |
1046 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET && |
1047 | usess->consumer->enabled) { | |
2f77fc4b | 1048 | /* For each consumer socket, send relayd sockets */ |
56047f5a JG |
1049 | lttng::urcu::read_lock_guard read_lock; |
1050 | ||
28ab034a JG |
1051 | cds_lfht_for_each_entry ( |
1052 | usess->consumer->socks->ht, &iter.iter, socket, node.node) { | |
2f77fc4b | 1053 | pthread_mutex_lock(socket->lock); |
28ab034a JG |
1054 | ret = send_consumer_relayd_sockets( |
1055 | session->id, | |
1056 | usess->consumer, | |
1057 | socket, | |
1058 | session->name, | |
1059 | session->hostname, | |
1060 | session->base_path, | |
1061 | session->live_timer, | |
cd9adb8b | 1062 | current_chunk_id.is_set ? ¤t_chunk_id.value : nullptr, |
28ab034a JG |
1063 | session->creation_time, |
1064 | session->name_contains_creation_time); | |
2f77fc4b | 1065 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1066 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1067 | goto error; |
1068 | } | |
6dc3064a DG |
1069 | /* Session is now ready for network streaming. */ |
1070 | session->net_handle = 1; | |
2f77fc4b | 1071 | } |
56047f5a | 1072 | |
28ab034a JG |
1073 | session->consumer->relay_major_version = usess->consumer->relay_major_version; |
1074 | session->consumer->relay_minor_version = usess->consumer->relay_minor_version; | |
1075 | session->consumer->relay_allows_clear = usess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1076 | } |
1077 | ||
28ab034a JG |
1078 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET && |
1079 | ksess->consumer->enabled) { | |
56047f5a JG |
1080 | lttng::urcu::read_lock_guard read_lock; |
1081 | ||
28ab034a JG |
1082 | cds_lfht_for_each_entry ( |
1083 | ksess->consumer->socks->ht, &iter.iter, socket, node.node) { | |
2f77fc4b | 1084 | pthread_mutex_lock(socket->lock); |
28ab034a JG |
1085 | ret = send_consumer_relayd_sockets( |
1086 | session->id, | |
1087 | ksess->consumer, | |
1088 | socket, | |
1089 | session->name, | |
1090 | session->hostname, | |
1091 | session->base_path, | |
1092 | session->live_timer, | |
cd9adb8b | 1093 | current_chunk_id.is_set ? ¤t_chunk_id.value : nullptr, |
28ab034a JG |
1094 | session->creation_time, |
1095 | session->name_contains_creation_time); | |
2f77fc4b | 1096 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1097 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1098 | goto error; |
1099 | } | |
6dc3064a DG |
1100 | /* Session is now ready for network streaming. */ |
1101 | session->net_handle = 1; | |
2f77fc4b | 1102 | } |
56047f5a | 1103 | |
28ab034a JG |
1104 | session->consumer->relay_major_version = ksess->consumer->relay_major_version; |
1105 | session->consumer->relay_minor_version = ksess->consumer->relay_minor_version; | |
1106 | session->consumer->relay_allows_clear = ksess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1107 | } |
1108 | ||
1109 | error: | |
1110 | return ret; | |
1111 | } | |
1112 | ||
9b6c7ec5 DG |
1113 | /* |
1114 | * Start a kernel session by opening all necessary streams. | |
1115 | */ | |
4dbe1875 | 1116 | int start_kernel_session(struct ltt_kernel_session *ksess) |
9b6c7ec5 DG |
1117 | { |
1118 | int ret; | |
1119 | struct ltt_kernel_channel *kchan; | |
1120 | ||
1121 | /* Open kernel metadata */ | |
cd9adb8b | 1122 | if (ksess->metadata == nullptr && ksess->output_traces) { |
9b6c7ec5 DG |
1123 | ret = kernel_open_metadata(ksess); |
1124 | if (ret < 0) { | |
1125 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1126 | goto error; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | /* Open kernel metadata stream */ | |
07b86b52 | 1131 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1132 | ret = kernel_open_metadata_stream(ksess); |
1133 | if (ret < 0) { | |
1134 | ERR("Kernel create metadata stream failed"); | |
1135 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1136 | goto error; | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* For each channel */ | |
28ab034a | 1141 | cds_list_for_each_entry (kchan, &ksess->channel_list.head, list) { |
9b6c7ec5 DG |
1142 | if (kchan->stream_count == 0) { |
1143 | ret = kernel_open_channel_stream(kchan); | |
1144 | if (ret < 0) { | |
1145 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1146 | goto error; | |
1147 | } | |
1148 | /* Update the stream global counter */ | |
1149 | ksess->stream_count_global += ret; | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | /* Setup kernel consumer socket and send fds to it */ | |
1154 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1155 | if (ret != 0) { |
9b6c7ec5 DG |
1156 | ret = LTTNG_ERR_KERN_START_FAIL; |
1157 | goto error; | |
1158 | } | |
1159 | ||
1160 | /* This start the kernel tracing */ | |
1161 | ret = kernel_start_session(ksess); | |
1162 | if (ret < 0) { | |
1163 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1164 | goto error; | |
1165 | } | |
1166 | ||
1167 | /* Quiescent wait after starting trace */ | |
7d268848 | 1168 | kernel_wait_quiescent(); |
9b6c7ec5 | 1169 | |
66cefebd | 1170 | ksess->active = true; |
9b6c7ec5 DG |
1171 | |
1172 | ret = LTTNG_OK; | |
1173 | ||
1174 | error: | |
1175 | return ret; | |
1176 | } | |
1177 | ||
4dbe1875 MD |
1178 | int stop_kernel_session(struct ltt_kernel_session *ksess) |
1179 | { | |
1180 | struct ltt_kernel_channel *kchan; | |
1181 | bool error_occurred = false; | |
1182 | int ret; | |
1183 | ||
1184 | if (!ksess || !ksess->active) { | |
1185 | return LTTNG_OK; | |
1186 | } | |
1187 | DBG("Stopping kernel tracing"); | |
1188 | ||
1189 | ret = kernel_stop_session(ksess); | |
1190 | if (ret < 0) { | |
1191 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1192 | goto error; | |
1193 | } | |
1194 | ||
1195 | kernel_wait_quiescent(); | |
1196 | ||
1197 | /* Flush metadata after stopping (if exists) */ | |
1198 | if (ksess->metadata_stream_fd >= 0) { | |
1199 | ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd); | |
1200 | if (ret < 0) { | |
1201 | ERR("Kernel metadata flush failed"); | |
1202 | error_occurred = true; | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | /* Flush all buffers after stopping */ | |
28ab034a | 1207 | cds_list_for_each_entry (kchan, &ksess->channel_list.head, list) { |
4dbe1875 MD |
1208 | ret = kernel_flush_buffer(kchan); |
1209 | if (ret < 0) { | |
1210 | ERR("Kernel flush buffer error"); | |
1211 | error_occurred = true; | |
1212 | } | |
1213 | } | |
1214 | ||
66cefebd | 1215 | ksess->active = false; |
4dbe1875 MD |
1216 | if (error_occurred) { |
1217 | ret = LTTNG_ERR_UNK; | |
1218 | } else { | |
1219 | ret = LTTNG_OK; | |
1220 | } | |
1221 | error: | |
1222 | return ret; | |
1223 | } | |
1224 | ||
2f77fc4b DG |
1225 | /* |
1226 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1227 | */ | |
56a37563 | 1228 | int cmd_disable_channel(struct ltt_session *session, |
28ab034a JG |
1229 | enum lttng_domain_type domain, |
1230 | char *channel_name) | |
2f77fc4b DG |
1231 | { |
1232 | int ret; | |
1233 | struct ltt_ust_session *usess; | |
1234 | ||
1235 | usess = session->ust_session; | |
1236 | ||
56047f5a | 1237 | lttng::urcu::read_lock_guard read_lock; |
2223c96f | 1238 | |
2f77fc4b DG |
1239 | switch (domain) { |
1240 | case LTTNG_DOMAIN_KERNEL: | |
1241 | { | |
28ab034a | 1242 | ret = channel_kernel_disable(session->kernel_session, channel_name); |
f73fabfd | 1243 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1244 | goto error; |
1245 | } | |
1246 | ||
7d268848 | 1247 | kernel_wait_quiescent(); |
2f77fc4b DG |
1248 | break; |
1249 | } | |
1250 | case LTTNG_DOMAIN_UST: | |
1251 | { | |
1252 | struct ltt_ust_channel *uchan; | |
1253 | struct lttng_ht *chan_ht; | |
1254 | ||
1255 | chan_ht = usess->domain_global.channels; | |
1256 | ||
1257 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
cd9adb8b | 1258 | if (uchan == nullptr) { |
f73fabfd | 1259 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1260 | goto error; |
1261 | } | |
1262 | ||
7972aab2 | 1263 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1264 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1265 | goto error; |
1266 | } | |
1267 | break; | |
1268 | } | |
2f77fc4b | 1269 | default: |
f73fabfd | 1270 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1271 | goto error; |
1272 | } | |
1273 | ||
f73fabfd | 1274 | ret = LTTNG_OK; |
2f77fc4b DG |
1275 | |
1276 | error: | |
1277 | return ret; | |
1278 | } | |
1279 | ||
1280 | /* | |
1281 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1282 | * | |
1283 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1284 | */ | |
999af9c1 JR |
1285 | int cmd_enable_channel(struct command_ctx *cmd_ctx, int sock, int wpipe) |
1286 | { | |
1287 | int ret; | |
1288 | size_t channel_len; | |
1289 | ssize_t sock_recv_len; | |
cd9adb8b | 1290 | struct lttng_channel *channel = nullptr; |
999af9c1 JR |
1291 | struct lttng_buffer_view view; |
1292 | struct lttng_dynamic_buffer channel_buffer; | |
1293 | const struct lttng_domain command_domain = cmd_ctx->lsm.domain; | |
1294 | ||
1295 | lttng_dynamic_buffer_init(&channel_buffer); | |
1296 | channel_len = (size_t) cmd_ctx->lsm.u.channel.length; | |
1297 | ret = lttng_dynamic_buffer_set_size(&channel_buffer, channel_len); | |
1298 | if (ret) { | |
1299 | ret = LTTNG_ERR_NOMEM; | |
1300 | goto end; | |
1301 | } | |
1302 | ||
28ab034a | 1303 | sock_recv_len = lttcomm_recv_unix_sock(sock, channel_buffer.data, channel_len); |
999af9c1 JR |
1304 | if (sock_recv_len < 0 || sock_recv_len != channel_len) { |
1305 | ERR("Failed to receive \"enable channel\" command payload"); | |
1306 | ret = LTTNG_ERR_INVALID; | |
1307 | goto end; | |
1308 | } | |
1309 | ||
1310 | view = lttng_buffer_view_from_dynamic_buffer(&channel_buffer, 0, channel_len); | |
1311 | if (!lttng_buffer_view_is_valid(&view)) { | |
1312 | ret = LTTNG_ERR_INVALID; | |
1313 | goto end; | |
1314 | } | |
1315 | ||
1316 | if (lttng_channel_create_from_buffer(&view, &channel) != channel_len) { | |
1317 | ERR("Invalid channel payload received in \"enable channel\" command"); | |
1318 | ret = LTTNG_ERR_INVALID; | |
1319 | goto end; | |
1320 | } | |
1321 | ||
28ab034a | 1322 | ret = cmd_enable_channel_internal(cmd_ctx->session, &command_domain, channel, wpipe); |
999af9c1 JR |
1323 | |
1324 | end: | |
1325 | lttng_dynamic_buffer_reset(&channel_buffer); | |
1326 | lttng_channel_destroy(channel); | |
1327 | return ret; | |
1328 | } | |
1329 | ||
28ab034a JG |
1330 | static enum lttng_error_code cmd_enable_channel_internal(struct ltt_session *session, |
1331 | const struct lttng_domain *domain, | |
1332 | const struct lttng_channel *_attr, | |
1333 | int wpipe) | |
2f77fc4b | 1334 | { |
4878de5c | 1335 | enum lttng_error_code ret_code; |
2f77fc4b DG |
1336 | struct ltt_ust_session *usess = session->ust_session; |
1337 | struct lttng_ht *chan_ht; | |
1f345e94 | 1338 | size_t len; |
cd9adb8b | 1339 | struct lttng_channel *attr = nullptr; |
2f77fc4b | 1340 | |
a0377dfe FD |
1341 | LTTNG_ASSERT(session); |
1342 | LTTNG_ASSERT(_attr); | |
1343 | LTTNG_ASSERT(domain); | |
2f77fc4b | 1344 | |
56047f5a JG |
1345 | lttng::urcu::read_lock_guard read_lock; |
1346 | ||
999af9c1 JR |
1347 | attr = lttng_channel_copy(_attr); |
1348 | if (!attr) { | |
4878de5c | 1349 | ret_code = LTTNG_ERR_NOMEM; |
999af9c1 JR |
1350 | goto end; |
1351 | } | |
1352 | ||
1353 | len = lttng_strnlen(attr->name, sizeof(attr->name)); | |
1f345e94 PP |
1354 | |
1355 | /* Validate channel name */ | |
cd9adb8b | 1356 | if (attr->name[0] == '.' || memchr(attr->name, '/', len) != nullptr) { |
4878de5c | 1357 | ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME; |
1f345e94 PP |
1358 | goto end; |
1359 | } | |
1360 | ||
999af9c1 | 1361 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
2f77fc4b | 1362 | |
ecc48a90 JD |
1363 | /* |
1364 | * If the session is a live session, remove the switch timer, the | |
1365 | * live timer does the same thing but sends also synchronisation | |
1366 | * beacons for inactive streams. | |
1367 | */ | |
1368 | if (session->live_timer > 0) { | |
999af9c1 JR |
1369 | attr->attr.live_timer_interval = session->live_timer; |
1370 | attr->attr.switch_timer_interval = 0; | |
ecc48a90 JD |
1371 | } |
1372 | ||
6e21424e JR |
1373 | /* Check for feature support */ |
1374 | switch (domain->type) { | |
1375 | case LTTNG_DOMAIN_KERNEL: | |
1376 | { | |
7d268848 | 1377 | if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) { |
6e21424e JR |
1378 | /* Sampling position of buffer is not supported */ |
1379 | WARN("Kernel tracer does not support buffer monitoring. " | |
28ab034a JG |
1380 | "Setting the monitor interval timer to 0 " |
1381 | "(disabled) for channel '%s' of session '%s'", | |
1382 | attr->name, | |
1383 | session->name); | |
999af9c1 | 1384 | lttng_channel_set_monitor_timer_interval(attr, 0); |
6e21424e JR |
1385 | } |
1386 | break; | |
1387 | } | |
1388 | case LTTNG_DOMAIN_UST: | |
f28f9e44 | 1389 | break; |
6e21424e JR |
1390 | case LTTNG_DOMAIN_JUL: |
1391 | case LTTNG_DOMAIN_LOG4J: | |
1392 | case LTTNG_DOMAIN_PYTHON: | |
f28f9e44 JG |
1393 | if (!agent_tracing_is_enabled()) { |
1394 | DBG("Attempted to enable a channel in an agent domain but the agent thread is not running"); | |
4878de5c | 1395 | ret_code = LTTNG_ERR_AGENT_TRACING_DISABLED; |
f28f9e44 JG |
1396 | goto error; |
1397 | } | |
6e21424e JR |
1398 | break; |
1399 | default: | |
4878de5c | 1400 | ret_code = LTTNG_ERR_UNKNOWN_DOMAIN; |
6e21424e JR |
1401 | goto error; |
1402 | } | |
1403 | ||
7972aab2 | 1404 | switch (domain->type) { |
2f77fc4b DG |
1405 | case LTTNG_DOMAIN_KERNEL: |
1406 | { | |
1407 | struct ltt_kernel_channel *kchan; | |
1408 | ||
28ab034a | 1409 | kchan = trace_kernel_get_channel_by_name(attr->name, session->kernel_session); |
cd9adb8b | 1410 | if (kchan == nullptr) { |
8cc65d5c JR |
1411 | /* |
1412 | * Don't try to create a channel if the session has been started at | |
1413 | * some point in time before. The tracer does not allow it. | |
1414 | */ | |
1415 | if (session->has_been_started) { | |
4878de5c | 1416 | ret_code = LTTNG_ERR_TRACE_ALREADY_STARTED; |
8cc65d5c JR |
1417 | goto error; |
1418 | } | |
1419 | ||
28ab034a | 1420 | if (session->snapshot.nb_output > 0 || session->snapshot_mode) { |
54213acc | 1421 | /* Enforce mmap output for snapshot sessions. */ |
999af9c1 | 1422 | attr->attr.output = LTTNG_EVENT_MMAP; |
54213acc | 1423 | } |
28ab034a | 1424 | ret_code = channel_kernel_create(session->kernel_session, attr, wpipe); |
999af9c1 | 1425 | if (attr->name[0] != '\0') { |
85076754 MD |
1426 | session->kernel_session->has_non_default_channel = 1; |
1427 | } | |
2f77fc4b | 1428 | } else { |
4878de5c | 1429 | ret_code = channel_kernel_enable(session->kernel_session, kchan); |
2f77fc4b DG |
1430 | } |
1431 | ||
4878de5c | 1432 | if (ret_code != LTTNG_OK) { |
2f77fc4b DG |
1433 | goto error; |
1434 | } | |
1435 | ||
7d268848 | 1436 | kernel_wait_quiescent(); |
2f77fc4b DG |
1437 | break; |
1438 | } | |
1439 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1440 | case LTTNG_DOMAIN_JUL: |
1441 | case LTTNG_DOMAIN_LOG4J: | |
1442 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1443 | { |
1444 | struct ltt_ust_channel *uchan; | |
1445 | ||
9232818f JG |
1446 | /* |
1447 | * FIXME | |
1448 | * | |
1449 | * Current agent implementation limitations force us to allow | |
1450 | * only one channel at once in "agent" subdomains. Each | |
1451 | * subdomain has a default channel name which must be strictly | |
1452 | * adhered to. | |
1453 | */ | |
1454 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
5c7248cd JG |
1455 | if (strncmp(attr->name, |
1456 | DEFAULT_JUL_CHANNEL_NAME, | |
1457 | LTTNG_SYMBOL_NAME_LEN - 1) != 0) { | |
4878de5c | 1458 | ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME; |
9232818f JG |
1459 | goto error; |
1460 | } | |
1461 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
5c7248cd JG |
1462 | if (strncmp(attr->name, |
1463 | DEFAULT_LOG4J_CHANNEL_NAME, | |
1464 | LTTNG_SYMBOL_NAME_LEN - 1) != 0) { | |
4878de5c | 1465 | ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME; |
9232818f JG |
1466 | goto error; |
1467 | } | |
1468 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
28ab034a JG |
1469 | if (strncmp(attr->name, |
1470 | DEFAULT_PYTHON_CHANNEL_NAME, | |
5c7248cd | 1471 | LTTNG_SYMBOL_NAME_LEN - 1) != 0) { |
4878de5c | 1472 | ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME; |
9232818f JG |
1473 | goto error; |
1474 | } | |
1475 | } | |
1476 | ||
2f77fc4b DG |
1477 | chan_ht = usess->domain_global.channels; |
1478 | ||
999af9c1 | 1479 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
cd9adb8b | 1480 | if (uchan == nullptr) { |
8cc65d5c JR |
1481 | /* |
1482 | * Don't try to create a channel if the session has been started at | |
1483 | * some point in time before. The tracer does not allow it. | |
1484 | */ | |
1485 | if (session->has_been_started) { | |
4878de5c | 1486 | ret_code = LTTNG_ERR_TRACE_ALREADY_STARTED; |
8cc65d5c JR |
1487 | goto error; |
1488 | } | |
1489 | ||
4878de5c | 1490 | ret_code = channel_ust_create(usess, attr, domain->buf_type); |
999af9c1 | 1491 | if (attr->name[0] != '\0') { |
85076754 MD |
1492 | usess->has_non_default_channel = 1; |
1493 | } | |
2f77fc4b | 1494 | } else { |
4878de5c | 1495 | ret_code = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1496 | } |
1497 | break; | |
1498 | } | |
2f77fc4b | 1499 | default: |
4878de5c | 1500 | ret_code = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1501 | goto error; |
1502 | } | |
1503 | ||
4878de5c | 1504 | if (ret_code == LTTNG_OK && attr->attr.output != LTTNG_EVENT_MMAP) { |
54213acc JG |
1505 | session->has_non_mmap_channel = true; |
1506 | } | |
2f77fc4b | 1507 | error: |
1f345e94 | 1508 | end: |
999af9c1 | 1509 | lttng_channel_destroy(attr); |
4878de5c | 1510 | return ret_code; |
2f77fc4b DG |
1511 | } |
1512 | ||
28ab034a JG |
1513 | enum lttng_error_code |
1514 | cmd_process_attr_tracker_get_tracking_policy(struct ltt_session *session, | |
1515 | enum lttng_domain_type domain, | |
1516 | enum lttng_process_attr process_attr, | |
1517 | enum lttng_tracking_policy *policy) | |
159b042f JG |
1518 | { |
1519 | enum lttng_error_code ret_code = LTTNG_OK; | |
1520 | const struct process_attr_tracker *tracker; | |
1521 | ||
1522 | switch (domain) { | |
1523 | case LTTNG_DOMAIN_KERNEL: | |
1524 | if (!session->kernel_session) { | |
1525 | ret_code = LTTNG_ERR_INVALID; | |
1526 | goto end; | |
1527 | } | |
28ab034a | 1528 | tracker = kernel_get_process_attr_tracker(session->kernel_session, process_attr); |
159b042f JG |
1529 | break; |
1530 | case LTTNG_DOMAIN_UST: | |
1531 | if (!session->ust_session) { | |
1532 | ret_code = LTTNG_ERR_INVALID; | |
1533 | goto end; | |
1534 | } | |
28ab034a | 1535 | tracker = trace_ust_get_process_attr_tracker(session->ust_session, process_attr); |
159b042f JG |
1536 | break; |
1537 | default: | |
1538 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1539 | goto end; | |
1540 | } | |
1541 | if (tracker) { | |
1542 | *policy = process_attr_tracker_get_tracking_policy(tracker); | |
1543 | } else { | |
1544 | ret_code = LTTNG_ERR_INVALID; | |
1545 | } | |
1546 | end: | |
1547 | return ret_code; | |
1548 | } | |
1549 | ||
28ab034a JG |
1550 | enum lttng_error_code |
1551 | cmd_process_attr_tracker_set_tracking_policy(struct ltt_session *session, | |
1552 | enum lttng_domain_type domain, | |
1553 | enum lttng_process_attr process_attr, | |
1554 | enum lttng_tracking_policy policy) | |
159b042f JG |
1555 | { |
1556 | enum lttng_error_code ret_code = LTTNG_OK; | |
1557 | ||
1558 | switch (policy) { | |
1559 | case LTTNG_TRACKING_POLICY_INCLUDE_SET: | |
1560 | case LTTNG_TRACKING_POLICY_EXCLUDE_ALL: | |
1561 | case LTTNG_TRACKING_POLICY_INCLUDE_ALL: | |
1562 | break; | |
1563 | default: | |
1564 | ret_code = LTTNG_ERR_INVALID; | |
1565 | goto end; | |
1566 | } | |
1567 | ||
1568 | switch (domain) { | |
1569 | case LTTNG_DOMAIN_KERNEL: | |
1570 | if (!session->kernel_session) { | |
1571 | ret_code = LTTNG_ERR_INVALID; | |
1572 | goto end; | |
1573 | } | |
1574 | ret_code = kernel_process_attr_tracker_set_tracking_policy( | |
28ab034a | 1575 | session->kernel_session, process_attr, policy); |
159b042f JG |
1576 | break; |
1577 | case LTTNG_DOMAIN_UST: | |
1578 | if (!session->ust_session) { | |
1579 | ret_code = LTTNG_ERR_INVALID; | |
1580 | goto end; | |
1581 | } | |
1582 | ret_code = trace_ust_process_attr_tracker_set_tracking_policy( | |
28ab034a | 1583 | session->ust_session, process_attr, policy); |
159b042f JG |
1584 | break; |
1585 | default: | |
1586 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1587 | break; | |
1588 | } | |
1589 | end: | |
1590 | return ret_code; | |
1591 | } | |
1592 | ||
28ab034a JG |
1593 | enum lttng_error_code |
1594 | cmd_process_attr_tracker_inclusion_set_add_value(struct ltt_session *session, | |
1595 | enum lttng_domain_type domain, | |
1596 | enum lttng_process_attr process_attr, | |
1597 | const struct process_attr_value *value) | |
159b042f JG |
1598 | { |
1599 | enum lttng_error_code ret_code = LTTNG_OK; | |
1600 | ||
1601 | switch (domain) { | |
1602 | case LTTNG_DOMAIN_KERNEL: | |
1603 | if (!session->kernel_session) { | |
1604 | ret_code = LTTNG_ERR_INVALID; | |
1605 | goto end; | |
1606 | } | |
1607 | ret_code = kernel_process_attr_tracker_inclusion_set_add_value( | |
28ab034a | 1608 | session->kernel_session, process_attr, value); |
159b042f JG |
1609 | break; |
1610 | case LTTNG_DOMAIN_UST: | |
1611 | if (!session->ust_session) { | |
1612 | ret_code = LTTNG_ERR_INVALID; | |
1613 | goto end; | |
1614 | } | |
1615 | ret_code = trace_ust_process_attr_tracker_inclusion_set_add_value( | |
28ab034a | 1616 | session->ust_session, process_attr, value); |
159b042f JG |
1617 | break; |
1618 | default: | |
1619 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1620 | break; | |
1621 | } | |
1622 | end: | |
1623 | return ret_code; | |
1624 | } | |
1625 | ||
28ab034a JG |
1626 | enum lttng_error_code |
1627 | cmd_process_attr_tracker_inclusion_set_remove_value(struct ltt_session *session, | |
1628 | enum lttng_domain_type domain, | |
1629 | enum lttng_process_attr process_attr, | |
1630 | const struct process_attr_value *value) | |
159b042f JG |
1631 | { |
1632 | enum lttng_error_code ret_code = LTTNG_OK; | |
1633 | ||
1634 | switch (domain) { | |
1635 | case LTTNG_DOMAIN_KERNEL: | |
1636 | if (!session->kernel_session) { | |
1637 | ret_code = LTTNG_ERR_INVALID; | |
1638 | goto end; | |
1639 | } | |
1640 | ret_code = kernel_process_attr_tracker_inclusion_set_remove_value( | |
28ab034a | 1641 | session->kernel_session, process_attr, value); |
159b042f JG |
1642 | break; |
1643 | case LTTNG_DOMAIN_UST: | |
1644 | if (!session->ust_session) { | |
1645 | ret_code = LTTNG_ERR_INVALID; | |
1646 | goto end; | |
1647 | } | |
1648 | ret_code = trace_ust_process_attr_tracker_inclusion_set_remove_value( | |
28ab034a | 1649 | session->ust_session, process_attr, value); |
159b042f JG |
1650 | break; |
1651 | default: | |
1652 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1653 | break; | |
1654 | } | |
1655 | end: | |
1656 | return ret_code; | |
1657 | } | |
1658 | ||
28ab034a JG |
1659 | enum lttng_error_code |
1660 | cmd_process_attr_tracker_get_inclusion_set(struct ltt_session *session, | |
1661 | enum lttng_domain_type domain, | |
1662 | enum lttng_process_attr process_attr, | |
1663 | struct lttng_process_attr_values **values) | |
159b042f JG |
1664 | { |
1665 | enum lttng_error_code ret_code = LTTNG_OK; | |
1666 | const struct process_attr_tracker *tracker; | |
1667 | enum process_attr_tracker_status status; | |
1668 | ||
1669 | switch (domain) { | |
1670 | case LTTNG_DOMAIN_KERNEL: | |
1671 | if (!session->kernel_session) { | |
1672 | ret_code = LTTNG_ERR_INVALID; | |
1673 | goto end; | |
1674 | } | |
28ab034a | 1675 | tracker = kernel_get_process_attr_tracker(session->kernel_session, process_attr); |
159b042f JG |
1676 | break; |
1677 | case LTTNG_DOMAIN_UST: | |
1678 | if (!session->ust_session) { | |
1679 | ret_code = LTTNG_ERR_INVALID; | |
1680 | goto end; | |
1681 | } | |
28ab034a | 1682 | tracker = trace_ust_get_process_attr_tracker(session->ust_session, process_attr); |
159b042f JG |
1683 | break; |
1684 | default: | |
1685 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1686 | goto end; | |
1687 | } | |
1688 | ||
1689 | if (!tracker) { | |
1690 | ret_code = LTTNG_ERR_INVALID; | |
1691 | goto end; | |
1692 | } | |
1693 | ||
1694 | status = process_attr_tracker_get_inclusion_set(tracker, values); | |
1695 | switch (status) { | |
1696 | case PROCESS_ATTR_TRACKER_STATUS_OK: | |
1697 | ret_code = LTTNG_OK; | |
1698 | break; | |
1699 | case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY: | |
1700 | ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY; | |
1701 | break; | |
1702 | case PROCESS_ATTR_TRACKER_STATUS_ERROR: | |
1703 | ret_code = LTTNG_ERR_NOMEM; | |
1704 | break; | |
1705 | default: | |
1706 | ret_code = LTTNG_ERR_UNK; | |
1707 | break; | |
1708 | } | |
1709 | ||
1710 | end: | |
1711 | return ret_code; | |
1712 | } | |
1713 | ||
2f77fc4b DG |
1714 | /* |
1715 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1716 | */ | |
8ddd72ef | 1717 | int cmd_disable_event(struct command_ctx *cmd_ctx, |
28ab034a JG |
1718 | struct lttng_event *event, |
1719 | char *filter_expression, | |
1720 | struct lttng_bytecode *bytecode, | |
1721 | struct lttng_event_exclusion *exclusion) | |
2f77fc4b DG |
1722 | { |
1723 | int ret; | |
df4f5a87 | 1724 | const char *event_name; |
8ddd72ef JR |
1725 | const struct ltt_session *session = cmd_ctx->session; |
1726 | const char *channel_name = cmd_ctx->lsm.u.disable.channel_name; | |
1727 | const enum lttng_domain_type domain = cmd_ctx->lsm.domain.type; | |
6e911cad | 1728 | |
18a720cd MD |
1729 | DBG("Disable event command for event \'%s\'", event->name); |
1730 | ||
8ddd72ef JR |
1731 | /* |
1732 | * Filter and exclusions are simply not handled by the | |
1733 | * disable event command at this time. | |
1734 | * | |
1735 | * FIXME | |
1736 | */ | |
1737 | (void) filter_expression; | |
1738 | (void) exclusion; | |
1739 | ||
1740 | /* Ignore the presence of filter or exclusion for the event */ | |
1741 | event->filter = 0; | |
1742 | event->exclusion = 0; | |
1743 | ||
6e911cad MD |
1744 | event_name = event->name; |
1745 | ||
56047f5a JG |
1746 | lttng::urcu::read_lock_guard read_lock; |
1747 | ||
9b7431cf | 1748 | /* Error out on unhandled search criteria */ |
28ab034a JG |
1749 | if (event->loglevel_type || event->loglevel != -1 || event->enabled || event->pid || |
1750 | event->filter || event->exclusion) { | |
7076b56e JG |
1751 | ret = LTTNG_ERR_UNK; |
1752 | goto error; | |
6e911cad | 1753 | } |
2f77fc4b DG |
1754 | |
1755 | switch (domain) { | |
1756 | case LTTNG_DOMAIN_KERNEL: | |
1757 | { | |
1758 | struct ltt_kernel_channel *kchan; | |
1759 | struct ltt_kernel_session *ksess; | |
1760 | ||
1761 | ksess = session->kernel_session; | |
1762 | ||
85076754 MD |
1763 | /* |
1764 | * If a non-default channel has been created in the | |
1765 | * session, explicitely require that -c chan_name needs | |
1766 | * to be provided. | |
1767 | */ | |
1768 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1769 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1770 | goto error_unlock; |
85076754 MD |
1771 | } |
1772 | ||
2f77fc4b | 1773 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
cd9adb8b | 1774 | if (kchan == nullptr) { |
f73fabfd | 1775 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1776 | goto error_unlock; |
2f77fc4b DG |
1777 | } |
1778 | ||
6e911cad MD |
1779 | switch (event->type) { |
1780 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1781 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1782 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1783 | case LTTNG_EVENT_PROBE: |
1784 | case LTTNG_EVENT_FUNCTION: | |
28ab034a | 1785 | case LTTNG_EVENT_FUNCTION_ENTRY: /* fall-through */ |
9550ee81 | 1786 | if (event_name[0] == '\0') { |
cd9adb8b | 1787 | ret = event_kernel_disable_event(kchan, nullptr, event->type); |
29c62722 | 1788 | } else { |
28ab034a | 1789 | ret = event_kernel_disable_event(kchan, event_name, event->type); |
29c62722 | 1790 | } |
6e911cad | 1791 | if (ret != LTTNG_OK) { |
7076b56e | 1792 | goto error_unlock; |
6e911cad MD |
1793 | } |
1794 | break; | |
6e911cad MD |
1795 | default: |
1796 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1797 | goto error_unlock; |
2f77fc4b DG |
1798 | } |
1799 | ||
7d268848 | 1800 | kernel_wait_quiescent(); |
2f77fc4b DG |
1801 | break; |
1802 | } | |
1803 | case LTTNG_DOMAIN_UST: | |
1804 | { | |
1805 | struct ltt_ust_channel *uchan; | |
1806 | struct ltt_ust_session *usess; | |
1807 | ||
1808 | usess = session->ust_session; | |
1809 | ||
7076b56e JG |
1810 | if (validate_ust_event_name(event_name)) { |
1811 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1812 | goto error_unlock; | |
1813 | } | |
1814 | ||
85076754 MD |
1815 | /* |
1816 | * If a non-default channel has been created in the | |
9550ee81 | 1817 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1818 | * to be provided. |
1819 | */ | |
1820 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1821 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1822 | goto error_unlock; |
85076754 MD |
1823 | } |
1824 | ||
28ab034a | 1825 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, channel_name); |
cd9adb8b | 1826 | if (uchan == nullptr) { |
f73fabfd | 1827 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1828 | goto error_unlock; |
2f77fc4b DG |
1829 | } |
1830 | ||
6e911cad MD |
1831 | switch (event->type) { |
1832 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1833 | /* |
1834 | * An empty event name means that everything | |
1835 | * should be disabled. | |
1836 | */ | |
1837 | if (event->name[0] == '\0') { | |
1838 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 | 1839 | } else { |
28ab034a | 1840 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
77d536b2 | 1841 | } |
6e911cad | 1842 | if (ret != LTTNG_OK) { |
7076b56e | 1843 | goto error_unlock; |
6e911cad MD |
1844 | } |
1845 | break; | |
1846 | default: | |
1847 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1848 | goto error_unlock; |
2f77fc4b DG |
1849 | } |
1850 | ||
28ab034a | 1851 | DBG3("Disable UST event %s in channel %s completed", event_name, channel_name); |
2f77fc4b DG |
1852 | break; |
1853 | } | |
5cdb6027 | 1854 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1855 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1856 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1857 | { |
fefd409b | 1858 | struct agent *agt; |
f20baf8e DG |
1859 | struct ltt_ust_session *usess = session->ust_session; |
1860 | ||
a0377dfe | 1861 | LTTNG_ASSERT(usess); |
f20baf8e | 1862 | |
6e911cad MD |
1863 | switch (event->type) { |
1864 | case LTTNG_EVENT_ALL: | |
1865 | break; | |
1866 | default: | |
1867 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1868 | goto error_unlock; |
6e911cad MD |
1869 | } |
1870 | ||
5cdb6027 | 1871 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1872 | if (!agt) { |
1873 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1874 | goto error_unlock; |
fefd409b | 1875 | } |
b3639870 JR |
1876 | /* |
1877 | * An empty event name means that everything | |
1878 | * should be disabled. | |
1879 | */ | |
1880 | if (event->name[0] == '\0') { | |
18a720cd MD |
1881 | ret = event_agent_disable_all(usess, agt); |
1882 | } else { | |
1883 | ret = event_agent_disable(usess, agt, event_name); | |
1884 | } | |
f20baf8e | 1885 | if (ret != LTTNG_OK) { |
7076b56e | 1886 | goto error_unlock; |
f20baf8e DG |
1887 | } |
1888 | ||
1889 | break; | |
1890 | } | |
2f77fc4b | 1891 | default: |
f73fabfd | 1892 | ret = LTTNG_ERR_UND; |
7076b56e | 1893 | goto error_unlock; |
2f77fc4b DG |
1894 | } |
1895 | ||
f73fabfd | 1896 | ret = LTTNG_OK; |
2f77fc4b | 1897 | |
7076b56e | 1898 | error_unlock: |
7076b56e | 1899 | error: |
8ddd72ef JR |
1900 | free(exclusion); |
1901 | free(bytecode); | |
1902 | free(filter_expression); | |
2f77fc4b DG |
1903 | return ret; |
1904 | } | |
1905 | ||
2f77fc4b DG |
1906 | /* |
1907 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1908 | */ | |
26e1c61f | 1909 | int cmd_add_context(struct command_ctx *cmd_ctx, |
28ab034a JG |
1910 | const struct lttng_event_context *event_context, |
1911 | int kwpipe) | |
2f77fc4b | 1912 | { |
d5979e4a | 1913 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
26e1c61f JR |
1914 | const enum lttng_domain_type domain = cmd_ctx->lsm.domain.type; |
1915 | const struct ltt_session *session = cmd_ctx->session; | |
1916 | const char *channel_name = cmd_ctx->lsm.u.context.channel_name; | |
bdf64013 | 1917 | |
9a699f7b JR |
1918 | /* |
1919 | * Don't try to add a context if the session has been started at | |
1920 | * some point in time before. The tracer does not allow it and would | |
1921 | * result in a corrupted trace. | |
1922 | */ | |
26e1c61f | 1923 | if (cmd_ctx->session->has_been_started) { |
9a699f7b JR |
1924 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1925 | goto end; | |
1926 | } | |
1927 | ||
2f77fc4b DG |
1928 | switch (domain) { |
1929 | case LTTNG_DOMAIN_KERNEL: | |
a0377dfe | 1930 | LTTNG_ASSERT(session->kernel_session); |
979e618e DG |
1931 | |
1932 | if (session->kernel_session->channel_count == 0) { | |
1933 | /* Create default channel */ | |
cd9adb8b | 1934 | ret = channel_kernel_create(session->kernel_session, nullptr, kwpipe); |
979e618e DG |
1935 | if (ret != LTTNG_OK) { |
1936 | goto error; | |
1937 | } | |
d5979e4a | 1938 | chan_kern_created = 1; |
979e618e | 1939 | } |
2f77fc4b | 1940 | /* Add kernel context to kernel tracer */ |
28ab034a | 1941 | ret = context_kernel_add(session->kernel_session, event_context, channel_name); |
f73fabfd | 1942 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1943 | goto error; |
1944 | } | |
1945 | break; | |
bdf64013 JG |
1946 | case LTTNG_DOMAIN_JUL: |
1947 | case LTTNG_DOMAIN_LOG4J: | |
1948 | { | |
1949 | /* | |
1950 | * Validate channel name. | |
1951 | * If no channel name is given and the domain is JUL or LOG4J, | |
1952 | * set it to the appropriate domain-specific channel name. If | |
1953 | * a name is provided but does not match the expexted channel | |
1954 | * name, return an error. | |
1955 | */ | |
1956 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
5c7248cd | 1957 | strcmp(channel_name, DEFAULT_JUL_CHANNEL_NAME) != 0) { |
bdf64013 JG |
1958 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
1959 | goto error; | |
1960 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
5c7248cd | 1961 | strcmp(channel_name, DEFAULT_LOG4J_CHANNEL_NAME) != 0) { |
bdf64013 JG |
1962 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
1963 | goto error; | |
1964 | } | |
1965 | } | |
30eb3927 | 1966 | /* fall through */ |
2f77fc4b DG |
1967 | case LTTNG_DOMAIN_UST: |
1968 | { | |
1969 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1970 | unsigned int chan_count; |
1971 | ||
a0377dfe | 1972 | LTTNG_ASSERT(usess); |
2f77fc4b | 1973 | |
85076754 | 1974 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1975 | if (chan_count == 0) { |
1976 | struct lttng_channel *attr; | |
1977 | /* Create default channel */ | |
0a9c6494 | 1978 | attr = channel_new_default_attr(domain, usess->buffer_type); |
cd9adb8b | 1979 | if (attr == nullptr) { |
979e618e DG |
1980 | ret = LTTNG_ERR_FATAL; |
1981 | goto error; | |
1982 | } | |
1983 | ||
7972aab2 | 1984 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1985 | if (ret != LTTNG_OK) { |
1986 | free(attr); | |
1987 | goto error; | |
1988 | } | |
cf0bcb51 | 1989 | channel_attr_destroy(attr); |
d5979e4a | 1990 | chan_ust_created = 1; |
979e618e DG |
1991 | } |
1992 | ||
28ab034a | 1993 | ret = context_ust_add(usess, domain, event_context, channel_name); |
f73fabfd | 1994 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1995 | goto error; |
1996 | } | |
1997 | break; | |
1998 | } | |
2f77fc4b | 1999 | default: |
f73fabfd | 2000 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2001 | goto error; |
2002 | } | |
2003 | ||
bdf64013 JG |
2004 | ret = LTTNG_OK; |
2005 | goto end; | |
2f77fc4b DG |
2006 | |
2007 | error: | |
d5979e4a | 2008 | if (chan_kern_created) { |
28ab034a JG |
2009 | struct ltt_kernel_channel *kchan = trace_kernel_get_channel_by_name( |
2010 | DEFAULT_CHANNEL_NAME, session->kernel_session); | |
d5979e4a | 2011 | /* Created previously, this should NOT fail. */ |
a0377dfe | 2012 | LTTNG_ASSERT(kchan); |
d5979e4a DG |
2013 | kernel_destroy_channel(kchan); |
2014 | } | |
2015 | ||
2016 | if (chan_ust_created) { | |
28ab034a JG |
2017 | struct ltt_ust_channel *uchan = trace_ust_find_channel_by_name( |
2018 | session->ust_session->domain_global.channels, DEFAULT_CHANNEL_NAME); | |
d5979e4a | 2019 | /* Created previously, this should NOT fail. */ |
a0377dfe | 2020 | LTTNG_ASSERT(uchan); |
d5979e4a | 2021 | /* Remove from the channel list of the session. */ |
28ab034a | 2022 | trace_ust_delete_channel(session->ust_session->domain_global.channels, uchan); |
d5979e4a DG |
2023 | trace_ust_destroy_channel(uchan); |
2024 | } | |
bdf64013 | 2025 | end: |
2f77fc4b DG |
2026 | return ret; |
2027 | } | |
2028 | ||
dac8e046 JG |
2029 | static inline bool name_starts_with(const char *name, const char *prefix) |
2030 | { | |
7966af57 | 2031 | const size_t max_cmp_len = std::min(strlen(prefix), (size_t) LTTNG_SYMBOL_NAME_LEN); |
dac8e046 JG |
2032 | |
2033 | return !strncmp(name, prefix, max_cmp_len); | |
2034 | } | |
2035 | ||
2036 | /* Perform userspace-specific event name validation */ | |
2037 | static int validate_ust_event_name(const char *name) | |
2038 | { | |
2039 | int ret = 0; | |
2040 | ||
2041 | if (!name) { | |
2042 | ret = -1; | |
2043 | goto end; | |
2044 | } | |
2045 | ||
2046 | /* | |
2047 | * Check name against all internal UST event component namespaces used | |
2048 | * by the agents. | |
2049 | */ | |
2050 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
28ab034a JG |
2051 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || |
2052 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
dac8e046 JG |
2053 | ret = -1; |
2054 | } | |
2055 | ||
2056 | end: | |
2057 | return ret; | |
2058 | } | |
88f06f15 | 2059 | |
2f77fc4b | 2060 | /* |
88f06f15 JG |
2061 | * Internal version of cmd_enable_event() with a supplemental |
2062 | * "internal_event" flag which is used to enable internal events which should | |
2063 | * be hidden from clients. Such events are used in the agent implementation to | |
2064 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 2065 | */ |
88f06f15 | 2066 | static int _cmd_enable_event(struct ltt_session *session, |
28ab034a JG |
2067 | const struct lttng_domain *domain, |
2068 | char *channel_name, | |
2069 | struct lttng_event *event, | |
2070 | char *filter_expression, | |
2071 | struct lttng_bytecode *filter, | |
2072 | struct lttng_event_exclusion *exclusion, | |
2073 | int wpipe, | |
2074 | bool internal_event) | |
2f77fc4b | 2075 | { |
9f449915 | 2076 | int ret = 0, channel_created = 0; |
cd9adb8b | 2077 | struct lttng_channel *attr = nullptr; |
2f77fc4b | 2078 | |
a0377dfe FD |
2079 | LTTNG_ASSERT(session); |
2080 | LTTNG_ASSERT(event); | |
2081 | LTTNG_ASSERT(channel_name); | |
2f77fc4b | 2082 | |
2a385866 | 2083 | /* If we have a filter, we must have its filter expression */ |
a0377dfe | 2084 | LTTNG_ASSERT(!(!!filter_expression ^ !!filter)); |
2a385866 | 2085 | |
9f449915 PP |
2086 | /* Normalize event name as a globbing pattern */ |
2087 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 2088 | |
9f449915 PP |
2089 | /* Normalize exclusion names as globbing patterns */ |
2090 | if (exclusion) { | |
2091 | size_t i; | |
f5ac4bd7 | 2092 | |
9f449915 PP |
2093 | for (i = 0; i < exclusion->count; i++) { |
2094 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
2095 | ||
2096 | strutils_normalize_star_glob_pattern(name); | |
2097 | } | |
930a2e99 JG |
2098 | } |
2099 | ||
9f449915 PP |
2100 | DBG("Enable event command for event \'%s\'", event->name); |
2101 | ||
56047f5a | 2102 | lttng::urcu::read_lock_guard read_lock; |
9f449915 | 2103 | |
7972aab2 | 2104 | switch (domain->type) { |
2f77fc4b DG |
2105 | case LTTNG_DOMAIN_KERNEL: |
2106 | { | |
2107 | struct ltt_kernel_channel *kchan; | |
2108 | ||
85076754 MD |
2109 | /* |
2110 | * If a non-default channel has been created in the | |
2111 | * session, explicitely require that -c chan_name needs | |
2112 | * to be provided. | |
2113 | */ | |
28ab034a | 2114 | if (session->kernel_session->has_non_default_channel && channel_name[0] == '\0') { |
85076754 MD |
2115 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; |
2116 | goto error; | |
2117 | } | |
2118 | ||
28ab034a | 2119 | kchan = trace_kernel_get_channel_by_name(channel_name, session->kernel_session); |
cd9adb8b | 2120 | if (kchan == nullptr) { |
28ab034a | 2121 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, LTTNG_BUFFER_GLOBAL); |
cd9adb8b | 2122 | if (attr == nullptr) { |
f73fabfd | 2123 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2124 | goto error; |
2125 | } | |
28ab034a | 2126 | if (lttng_strncpy(attr->name, channel_name, sizeof(attr->name))) { |
04c17253 | 2127 | ret = LTTNG_ERR_INVALID; |
04c17253 MD |
2128 | goto error; |
2129 | } | |
2f77fc4b | 2130 | |
28ab034a | 2131 | ret = cmd_enable_channel_internal(session, domain, attr, wpipe); |
f73fabfd | 2132 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2133 | goto error; |
2134 | } | |
e5f5db7f | 2135 | channel_created = 1; |
2f77fc4b DG |
2136 | } |
2137 | ||
2138 | /* Get the newly created kernel channel pointer */ | |
28ab034a | 2139 | kchan = trace_kernel_get_channel_by_name(channel_name, session->kernel_session); |
cd9adb8b | 2140 | if (kchan == nullptr) { |
2f77fc4b | 2141 | /* This sould not happen... */ |
f73fabfd | 2142 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2143 | goto error; |
2144 | } | |
2145 | ||
6e911cad MD |
2146 | switch (event->type) { |
2147 | case LTTNG_EVENT_ALL: | |
29c62722 | 2148 | { |
cd9adb8b JG |
2149 | char *filter_expression_a = nullptr; |
2150 | struct lttng_bytecode *filter_a = nullptr; | |
00a62084 MD |
2151 | |
2152 | /* | |
2153 | * We need to duplicate filter_expression and filter, | |
2154 | * because ownership is passed to first enable | |
2155 | * event. | |
2156 | */ | |
2157 | if (filter_expression) { | |
2158 | filter_expression_a = strdup(filter_expression); | |
2159 | if (!filter_expression_a) { | |
2160 | ret = LTTNG_ERR_FATAL; | |
2161 | goto error; | |
2162 | } | |
2163 | } | |
2164 | if (filter) { | |
64803277 | 2165 | filter_a = zmalloc<lttng_bytecode>(sizeof(*filter_a) + filter->len); |
00a62084 MD |
2166 | if (!filter_a) { |
2167 | free(filter_expression_a); | |
2168 | ret = LTTNG_ERR_FATAL; | |
2169 | goto error; | |
2170 | } | |
2171 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
2172 | } | |
28ab034a JG |
2173 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
2174 | ret = event_kernel_enable_event(kchan, event, filter_expression, filter); | |
a969e101 | 2175 | /* We have passed ownership */ |
cd9adb8b JG |
2176 | filter_expression = nullptr; |
2177 | filter = nullptr; | |
29c62722 MD |
2178 | if (ret != LTTNG_OK) { |
2179 | if (channel_created) { | |
2180 | /* Let's not leak a useless channel. */ | |
2181 | kernel_destroy_channel(kchan); | |
2182 | } | |
00a62084 MD |
2183 | free(filter_expression_a); |
2184 | free(filter_a); | |
29c62722 MD |
2185 | goto error; |
2186 | } | |
28ab034a JG |
2187 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ |
2188 | ret = event_kernel_enable_event( | |
2189 | kchan, event, filter_expression_a, filter_a); | |
60d21fa2 | 2190 | /* We have passed ownership */ |
cd9adb8b JG |
2191 | filter_expression_a = nullptr; |
2192 | filter_a = nullptr; | |
29c62722 MD |
2193 | if (ret != LTTNG_OK) { |
2194 | goto error; | |
2195 | } | |
2196 | break; | |
2197 | } | |
6e6ef3d7 | 2198 | case LTTNG_EVENT_PROBE: |
dcabc190 | 2199 | case LTTNG_EVENT_USERSPACE_PROBE: |
6e6ef3d7 DG |
2200 | case LTTNG_EVENT_FUNCTION: |
2201 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 2202 | case LTTNG_EVENT_TRACEPOINT: |
28ab034a | 2203 | ret = event_kernel_enable_event(kchan, event, filter_expression, filter); |
a969e101 | 2204 | /* We have passed ownership */ |
cd9adb8b JG |
2205 | filter_expression = nullptr; |
2206 | filter = nullptr; | |
6e911cad MD |
2207 | if (ret != LTTNG_OK) { |
2208 | if (channel_created) { | |
2209 | /* Let's not leak a useless channel. */ | |
2210 | kernel_destroy_channel(kchan); | |
2211 | } | |
2212 | goto error; | |
e5f5db7f | 2213 | } |
6e911cad MD |
2214 | break; |
2215 | case LTTNG_EVENT_SYSCALL: | |
28ab034a | 2216 | ret = event_kernel_enable_event(kchan, event, filter_expression, filter); |
a969e101 | 2217 | /* We have passed ownership */ |
cd9adb8b JG |
2218 | filter_expression = nullptr; |
2219 | filter = nullptr; | |
e2b957af MD |
2220 | if (ret != LTTNG_OK) { |
2221 | goto error; | |
2222 | } | |
6e911cad MD |
2223 | break; |
2224 | default: | |
2225 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
2226 | goto error; |
2227 | } | |
2228 | ||
7d268848 | 2229 | kernel_wait_quiescent(); |
2f77fc4b DG |
2230 | break; |
2231 | } | |
2232 | case LTTNG_DOMAIN_UST: | |
2233 | { | |
2234 | struct ltt_ust_channel *uchan; | |
2235 | struct ltt_ust_session *usess = session->ust_session; | |
2236 | ||
a0377dfe | 2237 | LTTNG_ASSERT(usess); |
2f77fc4b | 2238 | |
85076754 MD |
2239 | /* |
2240 | * If a non-default channel has been created in the | |
2241 | * session, explicitely require that -c chan_name needs | |
2242 | * to be provided. | |
2243 | */ | |
2244 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
2245 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2246 | goto error; | |
2247 | } | |
2248 | ||
2f77fc4b | 2249 | /* Get channel from global UST domain */ |
28ab034a | 2250 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, channel_name); |
cd9adb8b | 2251 | if (uchan == nullptr) { |
2f77fc4b | 2252 | /* Create default channel */ |
28ab034a | 2253 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, usess->buffer_type); |
cd9adb8b | 2254 | if (attr == nullptr) { |
f73fabfd | 2255 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2256 | goto error; |
2257 | } | |
28ab034a | 2258 | if (lttng_strncpy(attr->name, channel_name, sizeof(attr->name))) { |
04c17253 | 2259 | ret = LTTNG_ERR_INVALID; |
04c17253 MD |
2260 | goto error; |
2261 | } | |
2f77fc4b | 2262 | |
28ab034a | 2263 | ret = cmd_enable_channel_internal(session, domain, attr, wpipe); |
f73fabfd | 2264 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2265 | goto error; |
2266 | } | |
2f77fc4b DG |
2267 | |
2268 | /* Get the newly created channel reference back */ | |
28ab034a JG |
2269 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2270 | channel_name); | |
a0377dfe | 2271 | LTTNG_ASSERT(uchan); |
2f77fc4b DG |
2272 | } |
2273 | ||
141feb8c JG |
2274 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2275 | /* | |
2276 | * Don't allow users to add UST events to channels which | |
2277 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2278 | * Python, etc.). | |
2279 | */ | |
2280 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2281 | goto error; | |
2282 | } | |
2283 | ||
dac8e046 JG |
2284 | if (!internal_event) { |
2285 | /* | |
2286 | * Ensure the event name is not reserved for internal | |
2287 | * use. | |
2288 | */ | |
2289 | ret = validate_ust_event_name(event->name); | |
2290 | if (ret) { | |
28ab034a | 2291 | WARN("Userspace event name %s failed validation.", event->name); |
dac8e046 JG |
2292 | ret = LTTNG_ERR_INVALID_EVENT_NAME; |
2293 | goto error; | |
2294 | } | |
2295 | } | |
2296 | ||
2f77fc4b | 2297 | /* At this point, the session and channel exist on the tracer */ |
28ab034a JG |
2298 | ret = event_ust_enable_tracepoint( |
2299 | usess, uchan, event, filter_expression, filter, exclusion, internal_event); | |
49d21f93 | 2300 | /* We have passed ownership */ |
cd9adb8b JG |
2301 | filter_expression = nullptr; |
2302 | filter = nullptr; | |
2303 | exclusion = nullptr; | |
94382e15 JG |
2304 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2305 | goto already_enabled; | |
2306 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2307 | goto error; |
2308 | } | |
2309 | break; | |
2310 | } | |
5cdb6027 | 2311 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2312 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2313 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2314 | { |
da6c3a50 | 2315 | const char *default_event_name, *default_chan_name; |
fefd409b | 2316 | struct agent *agt; |
f20baf8e DG |
2317 | struct lttng_event uevent; |
2318 | struct lttng_domain tmp_dom; | |
2319 | struct ltt_ust_session *usess = session->ust_session; | |
2320 | ||
a0377dfe | 2321 | LTTNG_ASSERT(usess); |
f20baf8e | 2322 | |
f28f9e44 JG |
2323 | if (!agent_tracing_is_enabled()) { |
2324 | DBG("Attempted to enable an event in an agent domain but the agent thread is not running"); | |
2325 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
2326 | goto error; | |
2327 | } | |
2328 | ||
5cdb6027 | 2329 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2330 | if (!agt) { |
5cdb6027 | 2331 | agt = agent_create(domain->type); |
fefd409b | 2332 | if (!agt) { |
e5b3c48c | 2333 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2334 | goto error; |
2335 | } | |
2336 | agent_add(agt, usess->agents); | |
2337 | } | |
2338 | ||
022d91ba | 2339 | /* Create the default tracepoint. */ |
996de3c7 | 2340 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2341 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2342 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
28ab034a | 2343 | default_event_name = event_get_default_agent_ust_name(domain->type); |
da6c3a50 | 2344 | if (!default_event_name) { |
e5b3c48c | 2345 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2346 | goto error; |
f43f95a9 | 2347 | } |
da6c3a50 | 2348 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2349 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2350 | ||
2351 | /* | |
2352 | * The domain type is changed because we are about to enable the | |
2353 | * default channel and event for the JUL domain that are hardcoded. | |
2354 | * This happens in the UST domain. | |
2355 | */ | |
2356 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2357 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2358 | ||
0e115563 DG |
2359 | switch (domain->type) { |
2360 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2361 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2362 | break; |
2363 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2364 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2365 | break; |
2366 | case LTTNG_DOMAIN_PYTHON: | |
2367 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2368 | break; | |
2369 | default: | |
e98a44b0 | 2370 | /* The switch/case we are in makes this impossible */ |
a0377dfe | 2371 | abort(); |
da6c3a50 DG |
2372 | } |
2373 | ||
971da06a | 2374 | { |
cd9adb8b JG |
2375 | char *filter_expression_copy = nullptr; |
2376 | struct lttng_bytecode *filter_copy = nullptr; | |
971da06a JG |
2377 | |
2378 | if (filter) { | |
28ab034a JG |
2379 | const size_t filter_size = |
2380 | sizeof(struct lttng_bytecode) + filter->len; | |
51755dc8 | 2381 | |
64803277 | 2382 | filter_copy = zmalloc<lttng_bytecode>(filter_size); |
971da06a | 2383 | if (!filter_copy) { |
018096a4 | 2384 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2385 | goto error; |
971da06a | 2386 | } |
51755dc8 | 2387 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2388 | |
28ab034a | 2389 | filter_expression_copy = strdup(filter_expression); |
8404118c JG |
2390 | if (!filter_expression) { |
2391 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2392 | } |
2393 | ||
2394 | if (!filter_expression_copy || !filter_copy) { | |
2395 | free(filter_expression_copy); | |
2396 | free(filter_copy); | |
2397 | goto error; | |
8404118c | 2398 | } |
971da06a JG |
2399 | } |
2400 | ||
28ab034a JG |
2401 | ret = cmd_enable_event_internal(session, |
2402 | &tmp_dom, | |
2403 | (char *) default_chan_name, | |
2404 | &uevent, | |
2405 | filter_expression_copy, | |
2406 | filter_copy, | |
cd9adb8b | 2407 | nullptr, |
28ab034a | 2408 | wpipe); |
971da06a JG |
2409 | } |
2410 | ||
94382e15 JG |
2411 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2412 | goto already_enabled; | |
2413 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2414 | goto error; |
2415 | } | |
2416 | ||
2417 | /* The wild card * means that everything should be enabled. */ | |
2418 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
28ab034a | 2419 | ret = event_agent_enable_all(usess, agt, event, filter, filter_expression); |
f20baf8e | 2420 | } else { |
28ab034a | 2421 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e | 2422 | } |
cd9adb8b JG |
2423 | filter = nullptr; |
2424 | filter_expression = nullptr; | |
f20baf8e DG |
2425 | if (ret != LTTNG_OK) { |
2426 | goto error; | |
2427 | } | |
2428 | ||
2429 | break; | |
2430 | } | |
2f77fc4b | 2431 | default: |
f73fabfd | 2432 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2433 | goto error; |
2434 | } | |
2435 | ||
f73fabfd | 2436 | ret = LTTNG_OK; |
2f77fc4b | 2437 | |
94382e15 | 2438 | already_enabled: |
2f77fc4b | 2439 | error: |
49d21f93 MD |
2440 | free(filter_expression); |
2441 | free(filter); | |
2442 | free(exclusion); | |
cf0bcb51 | 2443 | channel_attr_destroy(attr); |
2f77fc4b DG |
2444 | return ret; |
2445 | } | |
2446 | ||
88f06f15 JG |
2447 | /* |
2448 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2449 | * We own filter, exclusion, and filter_expression. | |
2450 | */ | |
8ddd72ef | 2451 | int cmd_enable_event(struct command_ctx *cmd_ctx, |
28ab034a JG |
2452 | struct lttng_event *event, |
2453 | char *filter_expression, | |
2454 | struct lttng_event_exclusion *exclusion, | |
2455 | struct lttng_bytecode *bytecode, | |
2456 | int wpipe) | |
88f06f15 | 2457 | { |
8ddd72ef JR |
2458 | int ret; |
2459 | /* | |
2460 | * Copied to ensure proper alignment since 'lsm' is a packed structure. | |
2461 | */ | |
2462 | const lttng_domain command_domain = cmd_ctx->lsm.domain; | |
2463 | ||
2464 | /* | |
2465 | * The ownership of the following parameters is transferred to | |
2466 | * _cmd_enable_event: | |
2467 | * | |
2468 | * - filter_expression, | |
2469 | * - bytecode, | |
2470 | * - exclusion | |
2471 | */ | |
2472 | ret = _cmd_enable_event(cmd_ctx->session, | |
28ab034a JG |
2473 | &command_domain, |
2474 | cmd_ctx->lsm.u.enable.channel_name, | |
2475 | event, | |
2476 | filter_expression, | |
2477 | bytecode, | |
2478 | exclusion, | |
2479 | wpipe, | |
2480 | false); | |
cd9adb8b JG |
2481 | filter_expression = nullptr; |
2482 | bytecode = nullptr; | |
2483 | exclusion = nullptr; | |
8ddd72ef | 2484 | return ret; |
88f06f15 JG |
2485 | } |
2486 | ||
2487 | /* | |
2488 | * Enable an event which is internal to LTTng. An internal should | |
2489 | * never be made visible to clients and are immune to checks such as | |
2490 | * reserved names. | |
2491 | */ | |
2492 | static int cmd_enable_event_internal(struct ltt_session *session, | |
28ab034a JG |
2493 | const struct lttng_domain *domain, |
2494 | char *channel_name, | |
2495 | struct lttng_event *event, | |
2496 | char *filter_expression, | |
2497 | struct lttng_bytecode *filter, | |
2498 | struct lttng_event_exclusion *exclusion, | |
2499 | int wpipe) | |
88f06f15 | 2500 | { |
28ab034a JG |
2501 | return _cmd_enable_event(session, |
2502 | domain, | |
2503 | channel_name, | |
2504 | event, | |
2505 | filter_expression, | |
2506 | filter, | |
2507 | exclusion, | |
2508 | wpipe, | |
2509 | true); | |
88f06f15 JG |
2510 | } |
2511 | ||
2f77fc4b DG |
2512 | /* |
2513 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2514 | */ | |
8ddd72ef | 2515 | enum lttng_error_code cmd_list_tracepoints(enum lttng_domain_type domain, |
28ab034a | 2516 | struct lttng_payload *reply_payload) |
2f77fc4b | 2517 | { |
8ddd72ef | 2518 | enum lttng_error_code ret_code; |
2f77fc4b | 2519 | int ret; |
8ddd72ef | 2520 | ssize_t i, nb_events = 0; |
cd9adb8b | 2521 | struct lttng_event *events = nullptr; |
8ddd72ef JR |
2522 | struct lttcomm_list_command_header reply_command_header = {}; |
2523 | size_t reply_command_header_offset; | |
2524 | ||
2525 | assert(reply_payload); | |
2526 | ||
2527 | /* Reserve space for command reply header. */ | |
2528 | reply_command_header_offset = reply_payload->buffer.size; | |
2529 | ret = lttng_dynamic_buffer_set_size(&reply_payload->buffer, | |
28ab034a JG |
2530 | reply_command_header_offset + |
2531 | sizeof(struct lttcomm_list_command_header)); | |
8ddd72ef JR |
2532 | if (ret) { |
2533 | ret_code = LTTNG_ERR_NOMEM; | |
2534 | goto error; | |
2535 | } | |
2f77fc4b DG |
2536 | |
2537 | switch (domain) { | |
2538 | case LTTNG_DOMAIN_KERNEL: | |
8ddd72ef | 2539 | nb_events = kernel_list_events(&events); |
2f77fc4b | 2540 | if (nb_events < 0) { |
8ddd72ef | 2541 | ret_code = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2542 | goto error; |
2543 | } | |
2544 | break; | |
2545 | case LTTNG_DOMAIN_UST: | |
8ddd72ef | 2546 | nb_events = ust_app_list_events(&events); |
2f77fc4b | 2547 | if (nb_events < 0) { |
8ddd72ef | 2548 | ret_code = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2549 | goto error; |
2550 | } | |
2551 | break; | |
5cdb6027 | 2552 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2553 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2554 | case LTTNG_DOMAIN_PYTHON: |
8ddd72ef | 2555 | nb_events = agent_list_events(&events, domain); |
3c6a091f | 2556 | if (nb_events < 0) { |
8ddd72ef | 2557 | ret_code = LTTNG_ERR_UST_LIST_FAIL; |
3c6a091f DG |
2558 | goto error; |
2559 | } | |
2560 | break; | |
2f77fc4b | 2561 | default: |
8ddd72ef JR |
2562 | ret_code = LTTNG_ERR_UND; |
2563 | goto error; | |
2564 | } | |
2565 | ||
2566 | for (i = 0; i < nb_events; i++) { | |
cd9adb8b JG |
2567 | ret = lttng_event_serialize( |
2568 | &events[i], 0, nullptr, nullptr, 0, nullptr, reply_payload); | |
8ddd72ef JR |
2569 | if (ret) { |
2570 | ret_code = LTTNG_ERR_NOMEM; | |
2571 | goto error; | |
2572 | } | |
2573 | } | |
2574 | ||
2575 | if (nb_events > UINT32_MAX) { | |
2576 | ERR("Tracepoint count would overflow the tracepoint listing command's reply"); | |
2577 | ret_code = LTTNG_ERR_OVERFLOW; | |
2f77fc4b DG |
2578 | goto error; |
2579 | } | |
2580 | ||
8ddd72ef JR |
2581 | /* Update command reply header. */ |
2582 | reply_command_header.count = (uint32_t) nb_events; | |
28ab034a JG |
2583 | memcpy(reply_payload->buffer.data + reply_command_header_offset, |
2584 | &reply_command_header, | |
2585 | sizeof(reply_command_header)); | |
2f77fc4b | 2586 | |
8ddd72ef | 2587 | ret_code = LTTNG_OK; |
2f77fc4b | 2588 | error: |
8ddd72ef JR |
2589 | free(events); |
2590 | return ret_code; | |
2f77fc4b DG |
2591 | } |
2592 | ||
2593 | /* | |
2594 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2595 | */ | |
b2d68839 | 2596 | enum lttng_error_code cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
28ab034a | 2597 | struct lttng_payload *reply) |
2f77fc4b | 2598 | { |
b2d68839 | 2599 | enum lttng_error_code ret_code; |
2f77fc4b | 2600 | int ret; |
b2d68839 | 2601 | unsigned int i, nb_fields; |
cd9adb8b | 2602 | struct lttng_event_field *fields = nullptr; |
b2d68839 JR |
2603 | struct lttcomm_list_command_header reply_command_header = {}; |
2604 | size_t reply_command_header_offset; | |
2605 | ||
2606 | assert(reply); | |
2607 | ||
2608 | /* Reserve space for command reply header. */ | |
2609 | reply_command_header_offset = reply->buffer.size; | |
2610 | ret = lttng_dynamic_buffer_set_size(&reply->buffer, | |
28ab034a JG |
2611 | reply_command_header_offset + |
2612 | sizeof(struct lttcomm_list_command_header)); | |
b2d68839 JR |
2613 | if (ret) { |
2614 | ret_code = LTTNG_ERR_NOMEM; | |
2615 | goto error; | |
2616 | } | |
2f77fc4b DG |
2617 | |
2618 | switch (domain) { | |
2619 | case LTTNG_DOMAIN_UST: | |
b2d68839 JR |
2620 | ret = ust_app_list_event_fields(&fields); |
2621 | if (ret < 0) { | |
2622 | ret_code = LTTNG_ERR_UST_LIST_FAIL; | |
2f77fc4b DG |
2623 | goto error; |
2624 | } | |
b2d68839 | 2625 | |
2f77fc4b DG |
2626 | break; |
2627 | case LTTNG_DOMAIN_KERNEL: | |
28ab034a | 2628 | default: /* fall-through */ |
b2d68839 | 2629 | ret_code = LTTNG_ERR_UND; |
2f77fc4b DG |
2630 | goto error; |
2631 | } | |
2632 | ||
b2d68839 JR |
2633 | nb_fields = ret; |
2634 | ||
2635 | for (i = 0; i < nb_fields; i++) { | |
2636 | ret = lttng_event_field_serialize(&fields[i], reply); | |
2637 | if (ret) { | |
2638 | ret_code = LTTNG_ERR_NOMEM; | |
2639 | goto error; | |
2640 | } | |
2641 | } | |
2642 | ||
2643 | if (nb_fields > UINT32_MAX) { | |
2644 | ERR("Tracepoint field count would overflow the tracepoint field listing command's reply"); | |
2645 | ret_code = LTTNG_ERR_OVERFLOW; | |
2646 | goto error; | |
2647 | } | |
2648 | ||
2649 | /* Update command reply header. */ | |
2650 | reply_command_header.count = (uint32_t) nb_fields; | |
2651 | ||
28ab034a JG |
2652 | memcpy(reply->buffer.data + reply_command_header_offset, |
2653 | &reply_command_header, | |
2654 | sizeof(reply_command_header)); | |
b2d68839 JR |
2655 | |
2656 | ret_code = LTTNG_OK; | |
2f77fc4b DG |
2657 | |
2658 | error: | |
b2d68839 JR |
2659 | free(fields); |
2660 | return ret_code; | |
2f77fc4b DG |
2661 | } |
2662 | ||
28ab034a | 2663 | enum lttng_error_code cmd_list_syscalls(struct lttng_payload *reply_payload) |
834978fd | 2664 | { |
8ddd72ef JR |
2665 | enum lttng_error_code ret_code; |
2666 | ssize_t nb_events, i; | |
2667 | int ret; | |
cd9adb8b | 2668 | struct lttng_event *events = nullptr; |
8ddd72ef JR |
2669 | struct lttcomm_list_command_header reply_command_header = {}; |
2670 | size_t reply_command_header_offset; | |
2671 | ||
2672 | assert(reply_payload); | |
2673 | ||
2674 | /* Reserve space for command reply header. */ | |
2675 | reply_command_header_offset = reply_payload->buffer.size; | |
2676 | ret = lttng_dynamic_buffer_set_size(&reply_payload->buffer, | |
28ab034a JG |
2677 | reply_command_header_offset + |
2678 | sizeof(struct lttcomm_list_command_header)); | |
8ddd72ef JR |
2679 | if (ret) { |
2680 | ret_code = LTTNG_ERR_NOMEM; | |
2681 | goto end; | |
2682 | } | |
2683 | ||
2684 | nb_events = syscall_table_list(&events); | |
2685 | if (nb_events < 0) { | |
28ab034a | 2686 | ret_code = (enum lttng_error_code) - nb_events; |
8ddd72ef JR |
2687 | goto end; |
2688 | } | |
2689 | ||
2690 | for (i = 0; i < nb_events; i++) { | |
cd9adb8b JG |
2691 | ret = lttng_event_serialize( |
2692 | &events[i], 0, nullptr, nullptr, 0, nullptr, reply_payload); | |
8ddd72ef JR |
2693 | if (ret) { |
2694 | ret_code = LTTNG_ERR_NOMEM; | |
2695 | goto end; | |
2696 | } | |
2697 | } | |
2698 | ||
2699 | if (nb_events > UINT32_MAX) { | |
2700 | ERR("Syscall count would overflow the syscall listing command's reply"); | |
2701 | ret_code = LTTNG_ERR_OVERFLOW; | |
2702 | goto end; | |
2703 | } | |
2704 | ||
2705 | /* Update command reply header. */ | |
2706 | reply_command_header.count = (uint32_t) nb_events; | |
28ab034a JG |
2707 | memcpy(reply_payload->buffer.data + reply_command_header_offset, |
2708 | &reply_command_header, | |
2709 | sizeof(reply_command_header)); | |
8ddd72ef JR |
2710 | |
2711 | ret_code = LTTNG_OK; | |
2712 | end: | |
2713 | free(events); | |
2714 | return ret_code; | |
834978fd DG |
2715 | } |
2716 | ||
2f77fc4b DG |
2717 | /* |
2718 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2719 | * |
2720 | * Called with session mutex held. | |
2f77fc4b DG |
2721 | */ |
2722 | int cmd_start_trace(struct ltt_session *session) | |
2723 | { | |
82b69413 | 2724 | enum lttng_error_code ret; |
cde3e505 | 2725 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2726 | struct ltt_kernel_session *ksession; |
2727 | struct ltt_ust_session *usess; | |
28ab034a JG |
2728 | const bool session_rotated_after_last_stop = session->rotated_after_last_stop; |
2729 | const bool session_cleared_after_last_stop = session->cleared_after_last_stop; | |
2f77fc4b | 2730 | |
a0377dfe | 2731 | LTTNG_ASSERT(session); |
2f77fc4b DG |
2732 | |
2733 | /* Ease our life a bit ;) */ | |
2734 | ksession = session->kernel_session; | |
2735 | usess = session->ust_session; | |
2736 | ||
8382cf6f DG |
2737 | /* Is the session already started? */ |
2738 | if (session->active) { | |
f73fabfd | 2739 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
7a24ece3 JR |
2740 | /* Perform nothing */ |
2741 | goto end; | |
2f77fc4b DG |
2742 | } |
2743 | ||
1f496244 | 2744 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING && |
28ab034a | 2745 | !session->current_trace_chunk) { |
1f496244 JG |
2746 | /* |
2747 | * A rotation was launched while the session was stopped and | |
2748 | * it has not been completed yet. It is not possible to start | |
2749 | * the session since starting the session here would require a | |
2750 | * rotation from "NULL" to a new trace chunk. That rotation | |
2751 | * would overlap with the ongoing rotation, which is not | |
2752 | * supported. | |
2753 | */ | |
2754 | WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing", | |
28ab034a | 2755 | session->name); |
1f496244 JG |
2756 | ret = LTTNG_ERR_ROTATION_PENDING; |
2757 | goto error; | |
2758 | } | |
2759 | ||
cde3e505 DG |
2760 | /* |
2761 | * Starting a session without channel is useless since after that it's not | |
2762 | * possible to enable channel thus inform the client. | |
2763 | */ | |
2764 | if (usess && usess->domain_global.channels) { | |
2765 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2766 | } | |
2767 | if (ksession) { | |
2768 | nb_chan += ksession->channel_count; | |
2769 | } | |
2770 | if (!nb_chan) { | |
2771 | ret = LTTNG_ERR_NO_CHANNEL; | |
2772 | goto error; | |
2773 | } | |
2774 | ||
66cefebd | 2775 | session->active = true; |
1f496244 | 2776 | session->rotated_after_last_stop = false; |
b02f5986 | 2777 | session->cleared_after_last_stop = false; |
070b6a86 | 2778 | if (session->output_traces && !session->current_trace_chunk) { |
1f496244 JG |
2779 | if (!session->has_been_started) { |
2780 | struct lttng_trace_chunk *trace_chunk; | |
2781 | ||
28ab034a | 2782 | DBG("Creating initial trace chunk of session \"%s\"", session->name); |
cd9adb8b JG |
2783 | trace_chunk = |
2784 | session_create_new_trace_chunk(session, nullptr, nullptr, nullptr); | |
1f496244 JG |
2785 | if (!trace_chunk) { |
2786 | ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
2787 | goto error; | |
2788 | } | |
a0377dfe | 2789 | LTTNG_ASSERT(!session->current_trace_chunk); |
28ab034a | 2790 | ret = (lttng_error_code) session_set_trace_chunk( |
cd9adb8b | 2791 | session, trace_chunk, nullptr); |
1f496244 JG |
2792 | lttng_trace_chunk_put(trace_chunk); |
2793 | if (ret) { | |
2794 | ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
2795 | goto error; | |
2796 | } | |
2797 | } else { | |
2798 | DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk", | |
28ab034a | 2799 | session->name); |
1f496244 JG |
2800 | /* |
2801 | * Rotate existing streams into the new chunk. | |
2802 | * This is a "quiet" rotation has no client has | |
2803 | * explicitly requested this operation. | |
2804 | * | |
2805 | * There is also no need to wait for the rotation | |
2806 | * to complete as it will happen immediately. No data | |
2807 | * was produced as the session was stopped, so the | |
2808 | * rotation should happen on reception of the command. | |
2809 | */ | |
28ab034a | 2810 | ret = (lttng_error_code) cmd_rotate_session( |
cd9adb8b | 2811 | session, nullptr, true, LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); |
1f496244 JG |
2812 | if (ret != LTTNG_OK) { |
2813 | goto error; | |
2814 | } | |
5c408ad8 | 2815 | } |
c996624c JD |
2816 | } |
2817 | ||
2f77fc4b | 2818 | /* Kernel tracing */ |
cd9adb8b | 2819 | if (ksession != nullptr) { |
c996624c | 2820 | DBG("Start kernel tracing session %s", session->name); |
7966af57 | 2821 | ret = (lttng_error_code) start_kernel_session(ksession); |
9b6c7ec5 | 2822 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2823 | goto error; |
2824 | } | |
2f77fc4b DG |
2825 | } |
2826 | ||
2827 | /* Flag session that trace should start automatically */ | |
2828 | if (usess) { | |
82b69413 JG |
2829 | int int_ret = ust_app_start_trace_all(usess); |
2830 | ||
2831 | if (int_ret < 0) { | |
f73fabfd | 2832 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2833 | goto error; |
2834 | } | |
2835 | } | |
2836 | ||
04ed9e10 JG |
2837 | /* |
2838 | * Open a packet in every stream of the session to ensure that viewers | |
2839 | * can correctly identify the boundaries of the periods during which | |
2840 | * tracing was active for this session. | |
2841 | */ | |
2842 | ret = session_open_packets(session); | |
2843 | if (ret != LTTNG_OK) { | |
2844 | goto error; | |
2845 | } | |
2846 | ||
5c408ad8 JD |
2847 | /* |
2848 | * Clear the flag that indicates that a rotation was done while the | |
2849 | * session was stopped. | |
2850 | */ | |
2851 | session->rotated_after_last_stop = false; | |
2852 | ||
355cf1bd | 2853 | if (session->rotate_timer_period && !session->rotation_schedule_timer_enabled) { |
82b69413 | 2854 | int int_ret = timer_session_rotation_schedule_timer_start( |
28ab034a | 2855 | session, session->rotate_timer_period); |
82b69413 JG |
2856 | |
2857 | if (int_ret < 0) { | |
259c2674 JD |
2858 | ERR("Failed to enable rotate timer"); |
2859 | ret = LTTNG_ERR_UNK; | |
2860 | goto error; | |
2861 | } | |
2862 | } | |
2863 | ||
f73fabfd | 2864 | ret = LTTNG_OK; |
2f77fc4b DG |
2865 | |
2866 | error: | |
1f496244 JG |
2867 | if (ret == LTTNG_OK) { |
2868 | /* Flag this after a successful start. */ | |
66cefebd | 2869 | session->has_been_started = true; |
1f496244 | 2870 | } else { |
66cefebd | 2871 | session->active = false; |
1f496244 | 2872 | /* Restore initial state on error. */ |
28ab034a JG |
2873 | session->rotated_after_last_stop = session_rotated_after_last_stop; |
2874 | session->cleared_after_last_stop = session_cleared_after_last_stop; | |
1f496244 | 2875 | } |
7a24ece3 | 2876 | end: |
2f77fc4b DG |
2877 | return ret; |
2878 | } | |
2879 | ||
2880 | /* | |
2881 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2882 | */ | |
2883 | int cmd_stop_trace(struct ltt_session *session) | |
2884 | { | |
2885 | int ret; | |
2f77fc4b DG |
2886 | struct ltt_kernel_session *ksession; |
2887 | struct ltt_ust_session *usess; | |
2888 | ||
a0377dfe | 2889 | LTTNG_ASSERT(session); |
2f77fc4b | 2890 | |
4dbe1875 | 2891 | DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
2f77fc4b DG |
2892 | /* Short cut */ |
2893 | ksession = session->kernel_session; | |
2894 | usess = session->ust_session; | |
2895 | ||
40afd77d | 2896 | /* Session is not active. Skip everything and inform the client. */ |
8382cf6f | 2897 | if (!session->active) { |
f73fabfd | 2898 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2899 | goto error; |
2900 | } | |
2901 | ||
4dbe1875 MD |
2902 | ret = stop_kernel_session(ksession); |
2903 | if (ret != LTTNG_OK) { | |
2904 | goto error; | |
2f77fc4b DG |
2905 | } |
2906 | ||
14fb1ebe | 2907 | if (usess && usess->active) { |
2f77fc4b DG |
2908 | ret = ust_app_stop_trace_all(usess); |
2909 | if (ret < 0) { | |
f73fabfd | 2910 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2911 | goto error; |
2912 | } | |
2913 | } | |
2914 | ||
28ab034a | 2915 | DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
8382cf6f | 2916 | /* Flag inactive after a successful stop. */ |
66cefebd | 2917 | session->active = false; |
4dbe1875 | 2918 | ret = LTTNG_OK; |
2f77fc4b DG |
2919 | |
2920 | error: | |
2921 | return ret; | |
2922 | } | |
2923 | ||
2924 | /* | |
433f5ba9 JR |
2925 | * Set the base_path of the session only if subdir of a control uris is set. |
2926 | * Return LTTNG_OK on success, otherwise LTTNG_ERR_*. | |
2f77fc4b | 2927 | */ |
28ab034a JG |
2928 | static int |
2929 | set_session_base_path_from_uris(struct ltt_session *session, size_t nb_uri, struct lttng_uri *uris) | |
2f77fc4b | 2930 | { |
433f5ba9 JR |
2931 | int ret; |
2932 | size_t i; | |
2f77fc4b | 2933 | |
e3876bf0 | 2934 | for (i = 0; i < nb_uri; i++) { |
28ab034a | 2935 | if (uris[i].stype != LTTNG_STREAM_CONTROL || uris[i].subdir[0] == '\0') { |
e3876bf0 JR |
2936 | /* Not interested in these URIs */ |
2937 | continue; | |
2938 | } | |
2939 | ||
cd9adb8b | 2940 | if (session->base_path != nullptr) { |
e3876bf0 | 2941 | free(session->base_path); |
cd9adb8b | 2942 | session->base_path = nullptr; |
e3876bf0 JR |
2943 | } |
2944 | ||
2945 | /* Set session base_path */ | |
2946 | session->base_path = strdup(uris[i].subdir); | |
2947 | if (!session->base_path) { | |
433f5ba9 | 2948 | PERROR("Failed to copy base path \"%s\" to session \"%s\"", |
28ab034a JG |
2949 | uris[i].subdir, |
2950 | session->name); | |
433f5ba9 | 2951 | ret = LTTNG_ERR_NOMEM; |
e3876bf0 JR |
2952 | goto error; |
2953 | } | |
433f5ba9 | 2954 | DBG2("Setting base path \"%s\" for session \"%s\"", |
28ab034a JG |
2955 | session->base_path, |
2956 | session->name); | |
433f5ba9 JR |
2957 | } |
2958 | ret = LTTNG_OK; | |
2959 | error: | |
2960 | return ret; | |
2961 | } | |
2962 | ||
2963 | /* | |
2964 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2965 | */ | |
28ab034a | 2966 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, struct lttng_uri *uris) |
433f5ba9 JR |
2967 | { |
2968 | int ret, i; | |
2969 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2970 | struct ltt_ust_session *usess = session->ust_session; | |
2971 | ||
a0377dfe FD |
2972 | LTTNG_ASSERT(session); |
2973 | LTTNG_ASSERT(uris); | |
2974 | LTTNG_ASSERT(nb_uri > 0); | |
433f5ba9 JR |
2975 | |
2976 | /* Can't set consumer URI if the session is active. */ | |
2977 | if (session->active) { | |
2978 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2979 | goto error; | |
2980 | } | |
2981 | ||
2982 | /* | |
2983 | * Set the session base path if any. This is done inside | |
2984 | * cmd_set_consumer_uri to preserve backward compatibility of the | |
2985 | * previous session creation api vs the session descriptor api. | |
2986 | */ | |
2987 | ret = set_session_base_path_from_uris(session, nb_uri, uris); | |
2988 | if (ret != LTTNG_OK) { | |
2989 | goto error; | |
e3876bf0 JR |
2990 | } |
2991 | ||
bda32d56 | 2992 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2993 | for (i = 0; i < nb_uri; i++) { |
28ab034a | 2994 | ret = add_uri_to_consumer(session, session->consumer, &uris[i], LTTNG_DOMAIN_NONE); |
a74934ba | 2995 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2996 | goto error; |
2997 | } | |
2f77fc4b DG |
2998 | } |
2999 | ||
bda32d56 JG |
3000 | /* Set UST session URIs */ |
3001 | if (session->ust_session) { | |
3002 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 3003 | ret = add_uri_to_consumer(session, |
28ab034a JG |
3004 | session->ust_session->consumer, |
3005 | &uris[i], | |
3006 | LTTNG_DOMAIN_UST); | |
bda32d56 JG |
3007 | if (ret != LTTNG_OK) { |
3008 | goto error; | |
3009 | } | |
3010 | } | |
3011 | } | |
3012 | ||
3013 | /* Set kernel session URIs */ | |
3014 | if (session->kernel_session) { | |
3015 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 3016 | ret = add_uri_to_consumer(session, |
28ab034a JG |
3017 | session->kernel_session->consumer, |
3018 | &uris[i], | |
3019 | LTTNG_DOMAIN_KERNEL); | |
bda32d56 JG |
3020 | if (ret != LTTNG_OK) { |
3021 | goto error; | |
3022 | } | |
3023 | } | |
3024 | } | |
3025 | ||
7ab70fe0 DG |
3026 | /* |
3027 | * Make sure to set the session in output mode after we set URI since a | |
3028 | * session can be created without URL (thus flagged in no output mode). | |
3029 | */ | |
3030 | session->output_traces = 1; | |
3031 | if (ksess) { | |
3032 | ksess->output_traces = 1; | |
bda32d56 JG |
3033 | } |
3034 | ||
3035 | if (usess) { | |
7ab70fe0 DG |
3036 | usess->output_traces = 1; |
3037 | } | |
3038 | ||
2f77fc4b | 3039 | /* All good! */ |
f73fabfd | 3040 | ret = LTTNG_OK; |
2f77fc4b DG |
3041 | |
3042 | error: | |
3043 | return ret; | |
3044 | } | |
3045 | ||
28ab034a JG |
3046 | static enum lttng_error_code |
3047 | set_session_output_from_descriptor(struct ltt_session *session, | |
3048 | const struct lttng_session_descriptor *descriptor) | |
2f77fc4b DG |
3049 | { |
3050 | int ret; | |
b178f53e JG |
3051 | enum lttng_error_code ret_code = LTTNG_OK; |
3052 | enum lttng_session_descriptor_type session_type = | |
28ab034a | 3053 | lttng_session_descriptor_get_type(descriptor); |
b178f53e | 3054 | enum lttng_session_descriptor_output_type output_type = |
28ab034a | 3055 | lttng_session_descriptor_get_output_type(descriptor); |
b178f53e JG |
3056 | struct lttng_uri uris[2] = {}; |
3057 | size_t uri_count = 0; | |
3058 | ||
3059 | switch (output_type) { | |
3060 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: | |
3061 | goto end; | |
3062 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: | |
28ab034a | 3063 | lttng_session_descriptor_get_local_output_uri(descriptor, &uris[0]); |
b178f53e JG |
3064 | uri_count = 1; |
3065 | break; | |
3066 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: | |
28ab034a | 3067 | lttng_session_descriptor_get_network_output_uris(descriptor, &uris[0], &uris[1]); |
b178f53e JG |
3068 | uri_count = 2; |
3069 | break; | |
3070 | default: | |
3071 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3072 | goto end; |
2f77fc4b DG |
3073 | } |
3074 | ||
b178f53e JG |
3075 | switch (session_type) { |
3076 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3077 | { | |
cd9adb8b | 3078 | struct snapshot_output *new_output = nullptr; |
b178f53e JG |
3079 | |
3080 | new_output = snapshot_output_alloc(); | |
3081 | if (!new_output) { | |
3082 | ret_code = LTTNG_ERR_NOMEM; | |
3083 | goto end; | |
3084 | } | |
3085 | ||
3086 | ret = snapshot_output_init_with_uri(session, | |
28ab034a | 3087 | DEFAULT_SNAPSHOT_MAX_SIZE, |
cd9adb8b | 3088 | nullptr, |
28ab034a JG |
3089 | uris, |
3090 | uri_count, | |
3091 | session->consumer, | |
3092 | new_output, | |
3093 | &session->snapshot); | |
b178f53e | 3094 | if (ret < 0) { |
28ab034a | 3095 | ret_code = (ret == -ENOMEM) ? LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID; |
b178f53e JG |
3096 | snapshot_output_destroy(new_output); |
3097 | goto end; | |
3098 | } | |
3099 | snapshot_add_output(&session->snapshot, new_output); | |
3100 | break; | |
3101 | } | |
3102 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: | |
3103 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3104 | { | |
7966af57 | 3105 | ret_code = (lttng_error_code) cmd_set_consumer_uri(session, uri_count, uris); |
b178f53e JG |
3106 | break; |
3107 | } | |
3108 | default: | |
3109 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3110 | goto end; |
2f77fc4b | 3111 | } |
b178f53e JG |
3112 | end: |
3113 | return ret_code; | |
3114 | } | |
3115 | ||
28ab034a JG |
3116 | static enum lttng_error_code |
3117 | cmd_create_session_from_descriptor(struct lttng_session_descriptor *descriptor, | |
3118 | const lttng_sock_cred *creds, | |
3119 | const char *home_path) | |
b178f53e JG |
3120 | { |
3121 | int ret; | |
3122 | enum lttng_error_code ret_code; | |
3123 | const char *session_name; | |
cd9adb8b | 3124 | struct ltt_session *new_session = nullptr; |
b178f53e | 3125 | enum lttng_session_descriptor_status descriptor_status; |
2f77fc4b | 3126 | |
e32d7f27 | 3127 | session_lock_list(); |
b178f53e JG |
3128 | if (home_path) { |
3129 | if (*home_path != '/') { | |
3130 | ERR("Home path provided by client is not absolute"); | |
3131 | ret_code = LTTNG_ERR_INVALID; | |
3132 | goto end; | |
3133 | } | |
3134 | } | |
2f77fc4b | 3135 | |
28ab034a | 3136 | descriptor_status = lttng_session_descriptor_get_session_name(descriptor, &session_name); |
b178f53e JG |
3137 | switch (descriptor_status) { |
3138 | case LTTNG_SESSION_DESCRIPTOR_STATUS_OK: | |
3139 | break; | |
3140 | case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET: | |
cd9adb8b | 3141 | session_name = nullptr; |
b178f53e JG |
3142 | break; |
3143 | default: | |
3144 | ret_code = LTTNG_ERR_INVALID; | |
3145 | goto end; | |
3146 | } | |
e3876bf0 | 3147 | |
28ab034a | 3148 | ret_code = session_create(session_name, creds->uid, creds->gid, &new_session); |
b178f53e | 3149 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3150 | goto end; |
2f77fc4b DG |
3151 | } |
3152 | ||
139a8d25 | 3153 | ret_code = notification_thread_command_add_session(the_notification_thread_handle, |
28ab034a JG |
3154 | new_session->id, |
3155 | new_session->name, | |
3156 | new_session->uid, | |
3157 | new_session->gid); | |
139a8d25 JG |
3158 | if (ret_code != LTTNG_OK) { |
3159 | goto end; | |
3160 | } | |
3161 | ||
3162 | /* Announce the session's destruction to the notification thread when it is destroyed. */ | |
3163 | ret = session_add_destroy_notifier( | |
28ab034a JG |
3164 | new_session, |
3165 | [](const struct ltt_session *session, void *user_data __attribute__((unused))) { | |
3166 | (void) notification_thread_command_remove_session( | |
3167 | the_notification_thread_handle, session->id); | |
3168 | }, | |
cd9adb8b | 3169 | nullptr); |
139a8d25 JG |
3170 | if (ret) { |
3171 | PERROR("Failed to add notification thread command to session's destroy notifiers: session name = %s", | |
28ab034a | 3172 | new_session->name); |
139a8d25 JG |
3173 | ret = LTTNG_ERR_NOMEM; |
3174 | goto end; | |
3175 | } | |
3176 | ||
b178f53e | 3177 | if (!session_name) { |
28ab034a | 3178 | ret = lttng_session_descriptor_set_session_name(descriptor, new_session->name); |
b178f53e JG |
3179 | if (ret) { |
3180 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3181 | goto end; | |
3182 | } | |
3183 | } | |
3184 | ||
28ab034a | 3185 | if (!lttng_session_descriptor_is_output_destination_initialized(descriptor)) { |
b178f53e JG |
3186 | /* |
3187 | * Only include the session's creation time in the output | |
3188 | * destination if the name of the session itself was | |
3189 | * not auto-generated. | |
3190 | */ | |
3191 | ret_code = lttng_session_descriptor_set_default_output( | |
cd9adb8b JG |
3192 | descriptor, |
3193 | session_name ? &new_session->creation_time : nullptr, | |
3194 | home_path); | |
b178f53e | 3195 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3196 | goto end; |
2bba9e53 | 3197 | } |
2bba9e53 | 3198 | } else { |
b178f53e | 3199 | new_session->has_user_specified_directory = |
28ab034a | 3200 | lttng_session_descriptor_has_output_directory(descriptor); |
2f77fc4b DG |
3201 | } |
3202 | ||
b178f53e JG |
3203 | switch (lttng_session_descriptor_get_type(descriptor)) { |
3204 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3205 | new_session->snapshot_mode = 1; | |
3206 | break; | |
3207 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3208 | new_session->live_timer = | |
28ab034a | 3209 | lttng_session_descriptor_live_get_timer_interval(descriptor); |
b178f53e JG |
3210 | break; |
3211 | default: | |
3212 | break; | |
3213 | } | |
2f77fc4b | 3214 | |
b178f53e JG |
3215 | ret_code = set_session_output_from_descriptor(new_session, descriptor); |
3216 | if (ret_code != LTTNG_OK) { | |
3217 | goto end; | |
3218 | } | |
66cefebd | 3219 | new_session->consumer->enabled = true; |
b178f53e | 3220 | ret_code = LTTNG_OK; |
e32d7f27 | 3221 | end: |
b178f53e JG |
3222 | /* Release reference provided by the session_create function. */ |
3223 | session_put(new_session); | |
3224 | if (ret_code != LTTNG_OK && new_session) { | |
3225 | /* Release the global reference on error. */ | |
3226 | session_destroy(new_session); | |
e32d7f27 | 3227 | } |
b178f53e JG |
3228 | session_unlock_list(); |
3229 | return ret_code; | |
2f77fc4b DG |
3230 | } |
3231 | ||
28ab034a JG |
3232 | enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, |
3233 | int sock, | |
3234 | struct lttng_session_descriptor **return_descriptor) | |
27babd3a DG |
3235 | { |
3236 | int ret; | |
b178f53e JG |
3237 | size_t payload_size; |
3238 | struct lttng_dynamic_buffer payload; | |
3239 | struct lttng_buffer_view home_dir_view; | |
3240 | struct lttng_buffer_view session_descriptor_view; | |
cd9adb8b | 3241 | struct lttng_session_descriptor *session_descriptor = nullptr; |
b178f53e JG |
3242 | enum lttng_error_code ret_code; |
3243 | ||
3244 | lttng_dynamic_buffer_init(&payload); | |
28ab034a | 3245 | if (cmd_ctx->lsm.u.create_session.home_dir_size >= LTTNG_PATH_MAX) { |
b178f53e JG |
3246 | ret_code = LTTNG_ERR_INVALID; |
3247 | goto error; | |
27babd3a | 3248 | } |
3a91de3a | 3249 | if (cmd_ctx->lsm.u.create_session.session_descriptor_size > |
28ab034a | 3250 | LTTNG_SESSION_DESCRIPTOR_MAX_LEN) { |
b178f53e JG |
3251 | ret_code = LTTNG_ERR_INVALID; |
3252 | goto error; | |
27babd3a DG |
3253 | } |
3254 | ||
3a91de3a | 3255 | payload_size = cmd_ctx->lsm.u.create_session.home_dir_size + |
28ab034a | 3256 | cmd_ctx->lsm.u.create_session.session_descriptor_size; |
b178f53e JG |
3257 | ret = lttng_dynamic_buffer_set_size(&payload, payload_size); |
3258 | if (ret) { | |
3259 | ret_code = LTTNG_ERR_NOMEM; | |
3260 | goto error; | |
27babd3a DG |
3261 | } |
3262 | ||
b178f53e JG |
3263 | ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size); |
3264 | if (ret <= 0) { | |
3265 | ERR("Reception of session descriptor failed, aborting."); | |
3266 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3267 | goto error; | |
27babd3a DG |
3268 | } |
3269 | ||
b178f53e | 3270 | home_dir_view = lttng_buffer_view_from_dynamic_buffer( |
28ab034a | 3271 | &payload, 0, cmd_ctx->lsm.u.create_session.home_dir_size); |
3e6e0df2 | 3272 | if (cmd_ctx->lsm.u.create_session.home_dir_size > 0 && |
28ab034a | 3273 | !lttng_buffer_view_is_valid(&home_dir_view)) { |
3e6e0df2 JG |
3274 | ERR("Invalid payload in \"create session\" command: buffer too short to contain home directory"); |
3275 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3276 | goto error; | |
3277 | } | |
3278 | ||
b178f53e | 3279 | session_descriptor_view = lttng_buffer_view_from_dynamic_buffer( |
28ab034a JG |
3280 | &payload, |
3281 | cmd_ctx->lsm.u.create_session.home_dir_size, | |
3282 | cmd_ctx->lsm.u.create_session.session_descriptor_size); | |
3e6e0df2 JG |
3283 | if (!lttng_buffer_view_is_valid(&session_descriptor_view)) { |
3284 | ERR("Invalid payload in \"create session\" command: buffer too short to contain session descriptor"); | |
3285 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3286 | goto error; | |
3287 | } | |
27babd3a | 3288 | |
28ab034a JG |
3289 | ret = lttng_session_descriptor_create_from_buffer(&session_descriptor_view, |
3290 | &session_descriptor); | |
b178f53e JG |
3291 | if (ret < 0) { |
3292 | ERR("Failed to create session descriptor from payload of \"create session\" command"); | |
3293 | ret_code = LTTNG_ERR_INVALID; | |
3294 | goto error; | |
3295 | } | |
27babd3a | 3296 | |
b178f53e JG |
3297 | /* |
3298 | * Sets the descriptor's auto-generated properties (name, output) if | |
3299 | * needed. | |
3300 | */ | |
cd9adb8b JG |
3301 | ret_code = cmd_create_session_from_descriptor(session_descriptor, |
3302 | &cmd_ctx->creds, | |
3303 | home_dir_view.size ? home_dir_view.data : | |
3304 | nullptr); | |
b178f53e JG |
3305 | if (ret_code != LTTNG_OK) { |
3306 | goto error; | |
e32d7f27 | 3307 | } |
b178f53e JG |
3308 | |
3309 | ret_code = LTTNG_OK; | |
3310 | *return_descriptor = session_descriptor; | |
cd9adb8b | 3311 | session_descriptor = nullptr; |
b178f53e JG |
3312 | error: |
3313 | lttng_dynamic_buffer_reset(&payload); | |
3314 | lttng_session_descriptor_destroy(session_descriptor); | |
3315 | return ret_code; | |
27babd3a DG |
3316 | } |
3317 | ||
28ab034a | 3318 | static void cmd_destroy_session_reply(const struct ltt_session *session, void *_reply_context) |
3e3665b8 JG |
3319 | { |
3320 | int ret; | |
3321 | ssize_t comm_ret; | |
3322 | const struct cmd_destroy_session_reply_context *reply_context = | |
28ab034a | 3323 | (cmd_destroy_session_reply_context *) _reply_context; |
3e3665b8 JG |
3324 | struct lttng_dynamic_buffer payload; |
3325 | struct lttcomm_session_destroy_command_header cmd_header; | |
cd9adb8b | 3326 | struct lttng_trace_archive_location *location = nullptr; |
3e3665b8 | 3327 | struct lttcomm_lttng_msg llm = { |
37a5ef39 | 3328 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_DESTROY_SESSION, |
3285a971 | 3329 | .ret_code = reply_context->destruction_status, |
3e3665b8 | 3330 | .pid = UINT32_MAX, |
28ab034a | 3331 | .cmd_header_size = sizeof(struct lttcomm_session_destroy_command_header), |
3e3665b8 | 3332 | .data_size = 0, |
1c9a0b0e | 3333 | .fd_count = 0, |
3e3665b8 JG |
3334 | }; |
3335 | size_t payload_size_before_location; | |
3336 | ||
3337 | lttng_dynamic_buffer_init(&payload); | |
3338 | ||
3339 | ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm)); | |
0e270a1e | 3340 | if (ret) { |
3e3665b8 JG |
3341 | ERR("Failed to append session destruction message"); |
3342 | goto error; | |
0e270a1e | 3343 | } |
3e3665b8 | 3344 | |
28ab034a JG |
3345 | cmd_header.rotation_state = (int32_t) (reply_context->implicit_rotation_on_destroy ? |
3346 | session->rotation_state : | |
3347 | LTTNG_ROTATION_STATE_NO_ROTATION); | |
3348 | ret = lttng_dynamic_buffer_append(&payload, &cmd_header, sizeof(cmd_header)); | |
3e3665b8 JG |
3349 | if (ret) { |
3350 | ERR("Failed to append session destruction command header"); | |
3351 | goto error; | |
3352 | } | |
3353 | ||
3354 | if (!reply_context->implicit_rotation_on_destroy) { | |
3355 | DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply", | |
28ab034a | 3356 | session->name); |
3e3665b8 JG |
3357 | goto send_reply; |
3358 | } | |
3359 | if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) { | |
3360 | DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply", | |
28ab034a | 3361 | session->name); |
3e3665b8 JG |
3362 | goto send_reply; |
3363 | } | |
3364 | ||
3365 | location = session_get_trace_archive_location(session); | |
3366 | if (!location) { | |
3367 | ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"", | |
28ab034a | 3368 | session->name); |
3e3665b8 JG |
3369 | goto error; |
3370 | } | |
3371 | ||
3372 | payload_size_before_location = payload.size; | |
28ab034a | 3373 | comm_ret = lttng_trace_archive_location_serialize(location, &payload); |
d3740619 | 3374 | lttng_trace_archive_location_put(location); |
3e3665b8 JG |
3375 | if (comm_ret < 0) { |
3376 | ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"", | |
28ab034a | 3377 | session->name); |
3e3665b8 JG |
3378 | goto error; |
3379 | } | |
3380 | /* Update the message to indicate the location's length. */ | |
3381 | ((struct lttcomm_lttng_msg *) payload.data)->data_size = | |
28ab034a | 3382 | payload.size - payload_size_before_location; |
3e3665b8 | 3383 | send_reply: |
28ab034a | 3384 | comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd, payload.data, payload.size); |
3e3665b8 JG |
3385 | if (comm_ret != (ssize_t) payload.size) { |
3386 | ERR("Failed to send result of the destruction of session \"%s\" to client", | |
28ab034a | 3387 | session->name); |
3e3665b8 JG |
3388 | } |
3389 | error: | |
3390 | ret = close(reply_context->reply_sock_fd); | |
3391 | if (ret) { | |
3392 | PERROR("Failed to close client socket in deferred session destroy reply"); | |
3393 | } | |
3394 | lttng_dynamic_buffer_reset(&payload); | |
3395 | free(_reply_context); | |
3396 | } | |
3397 | ||
2f77fc4b DG |
3398 | /* |
3399 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
3400 | * |
3401 | * Called with session lock held. | |
2f77fc4b | 3402 | */ |
28f23191 | 3403 | int cmd_destroy_session(struct ltt_session *session, int *sock_fd) |
2f77fc4b DG |
3404 | { |
3405 | int ret; | |
3285a971 | 3406 | enum lttng_error_code destruction_last_error = LTTNG_OK; |
cd9adb8b | 3407 | struct cmd_destroy_session_reply_context *reply_context = nullptr; |
3e3665b8 JG |
3408 | |
3409 | if (sock_fd) { | |
64803277 | 3410 | reply_context = zmalloc<cmd_destroy_session_reply_context>(); |
3e3665b8 JG |
3411 | if (!reply_context) { |
3412 | ret = LTTNG_ERR_NOMEM; | |
3413 | goto end; | |
3414 | } | |
64803277 | 3415 | |
3e3665b8 JG |
3416 | reply_context->reply_sock_fd = *sock_fd; |
3417 | } | |
2f77fc4b DG |
3418 | |
3419 | /* Safety net */ | |
a0377dfe | 3420 | LTTNG_ASSERT(session); |
2f77fc4b | 3421 | |
28ab034a | 3422 | DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, session->id); |
3e3665b8 JG |
3423 | if (session->active) { |
3424 | DBG("Session \"%s\" is active, attempting to stop it before destroying it", | |
28ab034a | 3425 | session->name); |
3e3665b8 JG |
3426 | ret = cmd_stop_trace(session); |
3427 | if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
3428 | /* Carry on with the destruction of the session. */ | |
3429 | ERR("Failed to stop session \"%s\" as part of its destruction: %s", | |
28ab034a JG |
3430 | session->name, |
3431 | lttng_strerror(-ret)); | |
7966af57 | 3432 | destruction_last_error = (lttng_error_code) ret; |
3e3665b8 JG |
3433 | } |
3434 | } | |
5c408ad8 | 3435 | |
92816cc3 | 3436 | if (session->rotation_schedule_timer_enabled) { |
28ab034a | 3437 | if (timer_session_rotation_schedule_timer_stop(session)) { |
92816cc3 | 3438 | ERR("Failed to stop the \"rotation schedule\" timer of session %s", |
28ab034a | 3439 | session->name); |
3285a971 | 3440 | destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR; |
92816cc3 | 3441 | } |
259c2674 JD |
3442 | } |
3443 | ||
90936dcf | 3444 | if (session->rotate_size) { |
0038180d JG |
3445 | try { |
3446 | the_rotation_thread_handle->unsubscribe_session_consumed_size_rotation( | |
3447 | *session); | |
5b9eda8a | 3448 | } catch (const std::exception& e) { |
0038180d JG |
3449 | /* Continue the destruction of the session anyway. */ |
3450 | ERR("Failed to unsubscribe rotation thread notification channel from consumed size condition during session destruction: %s", | |
3451 | e.what()); | |
3452 | } | |
3453 | ||
90936dcf JD |
3454 | session->rotate_size = 0; |
3455 | } | |
3456 | ||
a7ceb342 | 3457 | if (session->rotated && session->current_trace_chunk && session->output_traces) { |
b5893d8e JG |
3458 | /* |
3459 | * Perform a last rotation on destruction if rotations have | |
3460 | * occurred during the session's lifetime. | |
3461 | */ | |
28ab034a | 3462 | ret = cmd_rotate_session( |
cd9adb8b | 3463 | session, nullptr, false, LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); |
d2956687 JG |
3464 | if (ret != LTTNG_OK) { |
3465 | ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s", | |
28ab034a JG |
3466 | session->name, |
3467 | lttng_strerror(-ret)); | |
7966af57 | 3468 | destruction_last_error = (lttng_error_code) -ret; |
124473a3 | 3469 | } |
0e270a1e | 3470 | if (reply_context) { |
3e3665b8 | 3471 | reply_context->implicit_rotation_on_destroy = true; |
0e270a1e JG |
3472 | } |
3473 | } else if (session->has_been_started && session->current_trace_chunk) { | |
7fdbed1c JG |
3474 | /* |
3475 | * The user has not triggered a session rotation. However, to | |
3476 | * ensure all data has been consumed, the session is rotated | |
3477 | * to a 'null' trace chunk before it is destroyed. | |
3478 | * | |
3479 | * This is a "quiet" rotation meaning that no notification is | |
3480 | * emitted and no renaming of the current trace chunk takes | |
3481 | * place. | |
3482 | */ | |
28ab034a | 3483 | ret = cmd_rotate_session( |
cd9adb8b | 3484 | session, nullptr, true, LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); |
53fb6336 JG |
3485 | /* |
3486 | * Rotation operations may not be supported by the kernel | |
3487 | * tracer. Hence, do not consider this implicit rotation as | |
3488 | * a session destruction error. The library has already stopped | |
3489 | * the session and waited for pending data; there is nothing | |
3490 | * left to do but complete the destruction of the session. | |
3491 | */ | |
28ab034a | 3492 | if (ret != LTTNG_OK && ret != -LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) { |
7fdbed1c | 3493 | ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s", |
28ab034a JG |
3494 | session->name, |
3495 | lttng_strerror(ret)); | |
7966af57 | 3496 | destruction_last_error = (lttng_error_code) -ret; |
7fdbed1c JG |
3497 | } |
3498 | } | |
5c408ad8 | 3499 | |
a503e1ef JG |
3500 | if (session->shm_path[0]) { |
3501 | /* | |
3502 | * When a session is created with an explicit shm_path, | |
3503 | * the consumer daemon will create its shared memory files | |
3504 | * at that location and will *not* unlink them. This is normal | |
3505 | * as the intention of that feature is to make it possible | |
3506 | * to retrieve the content of those files should a crash occur. | |
3507 | * | |
3508 | * To ensure the content of those files can be used, the | |
3509 | * sessiond daemon will replicate the content of the metadata | |
3510 | * cache in a metadata file. | |
3511 | * | |
3512 | * On clean-up, it is expected that the consumer daemon will | |
3513 | * unlink the shared memory files and that the session daemon | |
3514 | * will unlink the metadata file. Then, the session's directory | |
3515 | * in the shm path can be removed. | |
3516 | * | |
3517 | * Unfortunately, a flaw in the design of the sessiond's and | |
3518 | * consumerd's tear down of channels makes it impossible to | |
3519 | * determine when the sessiond _and_ the consumerd have both | |
3520 | * destroyed their representation of a channel. For one, the | |
3521 | * unlinking, close, and rmdir happen in deferred 'call_rcu' | |
3522 | * callbacks in both daemons. | |
3523 | * | |
3524 | * However, it is also impossible for the sessiond to know when | |
3525 | * the consumer daemon is done destroying its channel(s) since | |
3526 | * it occurs as a reaction to the closing of the channel's file | |
3527 | * descriptor. There is no resulting communication initiated | |
3528 | * from the consumerd to the sessiond to confirm that the | |
3529 | * operation is completed (and was successful). | |
3530 | * | |
3531 | * Until this is all fixed, the session daemon checks for the | |
3532 | * removal of the session's shm path which makes it possible | |
3533 | * to safely advertise a session as having been destroyed. | |
3534 | * | |
3535 | * Prior to this fix, it was not possible to reliably save | |
3536 | * a session making use of the --shm-path option, destroy it, | |
3537 | * and load it again. This is because the creation of the | |
3538 | * session would fail upon seeing the session's shm path | |
3539 | * already in existence. | |
3540 | * | |
3541 | * Note that none of the error paths in the check for the | |
3542 | * directory's existence return an error. This is normal | |
3543 | * as there isn't much that can be done. The session will | |
3544 | * be destroyed properly, except that we can't offer the | |
3545 | * guarantee that the same session can be re-created. | |
3546 | */ | |
3547 | current_completion_handler = &destroy_completion_handler.handler; | |
3548 | ret = lttng_strncpy(destroy_completion_handler.shm_path, | |
28ab034a JG |
3549 | session->shm_path, |
3550 | sizeof(destroy_completion_handler.shm_path)); | |
a0377dfe | 3551 | LTTNG_ASSERT(!ret); |
a503e1ef | 3552 | } |
e32d7f27 JG |
3553 | |
3554 | /* | |
3555 | * The session is destroyed. However, note that the command context | |
3556 | * still holds a reference to the session, thus delaying its destruction | |
3557 | * _at least_ up to the point when that reference is released. | |
3558 | */ | |
3559 | session_destroy(session); | |
3e3665b8 | 3560 | if (reply_context) { |
3285a971 | 3561 | reply_context->destruction_status = destruction_last_error; |
28ab034a JG |
3562 | ret = session_add_destroy_notifier( |
3563 | session, cmd_destroy_session_reply, (void *) reply_context); | |
3e3665b8 JG |
3564 | if (ret) { |
3565 | ret = LTTNG_ERR_FATAL; | |
3566 | goto end; | |
3567 | } else { | |
3568 | *sock_fd = -1; | |
3569 | } | |
0e270a1e JG |
3570 | } |
3571 | ret = LTTNG_OK; | |
3e3665b8 | 3572 | end: |
2f77fc4b DG |
3573 | return ret; |
3574 | } | |
3575 | ||
2f77fc4b DG |
3576 | /* |
3577 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3578 | */ | |
56a37563 | 3579 | int cmd_register_consumer(struct ltt_session *session, |
28ab034a JG |
3580 | enum lttng_domain_type domain, |
3581 | const char *sock_path, | |
3582 | struct consumer_data *cdata) | |
2f77fc4b DG |
3583 | { |
3584 | int ret, sock; | |
cd9adb8b | 3585 | struct consumer_socket *socket = nullptr; |
2f77fc4b | 3586 | |
a0377dfe FD |
3587 | LTTNG_ASSERT(session); |
3588 | LTTNG_ASSERT(cdata); | |
3589 | LTTNG_ASSERT(sock_path); | |
2f77fc4b DG |
3590 | |
3591 | switch (domain) { | |
3592 | case LTTNG_DOMAIN_KERNEL: | |
3593 | { | |
3594 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3595 | ||
a0377dfe | 3596 | LTTNG_ASSERT(ksess); |
2f77fc4b DG |
3597 | |
3598 | /* Can't register a consumer if there is already one */ | |
3599 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 3600 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
3601 | goto error; |
3602 | } | |
3603 | ||
3604 | sock = lttcomm_connect_unix_sock(sock_path); | |
3605 | if (sock < 0) { | |
f73fabfd | 3606 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
3607 | goto error; |
3608 | } | |
4ce514c4 | 3609 | cdata->cmd_sock = sock; |
2f77fc4b | 3610 | |
4ce514c4 | 3611 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
cd9adb8b | 3612 | if (socket == nullptr) { |
f66c074c DG |
3613 | ret = close(sock); |
3614 | if (ret < 0) { | |
3615 | PERROR("close register consumer"); | |
3616 | } | |
4ce514c4 | 3617 | cdata->cmd_sock = -1; |
f73fabfd | 3618 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3619 | goto error; |
3620 | } | |
3621 | ||
64803277 | 3622 | socket->lock = zmalloc<pthread_mutex_t>(); |
cd9adb8b | 3623 | if (socket->lock == nullptr) { |
2f77fc4b | 3624 | PERROR("zmalloc pthread mutex"); |
f73fabfd | 3625 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3626 | goto error; |
3627 | } | |
64803277 | 3628 | |
cd9adb8b | 3629 | pthread_mutex_init(socket->lock, nullptr); |
2f77fc4b DG |
3630 | socket->registered = 1; |
3631 | ||
56047f5a | 3632 | lttng::urcu::read_lock_guard read_lock; |
2f77fc4b | 3633 | consumer_add_socket(socket, ksess->consumer); |
2f77fc4b DG |
3634 | |
3635 | pthread_mutex_lock(&cdata->pid_mutex); | |
3636 | cdata->pid = -1; | |
3637 | pthread_mutex_unlock(&cdata->pid_mutex); | |
3638 | ||
3639 | break; | |
3640 | } | |
3641 | default: | |
3642 | /* TODO: Userspace tracing */ | |
f73fabfd | 3643 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3644 | goto error; |
3645 | } | |
3646 | ||
dd81b457 | 3647 | return LTTNG_OK; |
2f77fc4b DG |
3648 | |
3649 | error: | |
dd81b457 DG |
3650 | if (socket) { |
3651 | consumer_destroy_socket(socket); | |
3652 | } | |
2f77fc4b DG |
3653 | return ret; |
3654 | } | |
3655 | ||
3656 | /* | |
3657 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3658 | */ | |
28ab034a | 3659 | ssize_t cmd_list_domains(struct ltt_session *session, struct lttng_domain **domains) |
2f77fc4b DG |
3660 | { |
3661 | int ret, index = 0; | |
3662 | ssize_t nb_dom = 0; | |
fefd409b DG |
3663 | struct agent *agt; |
3664 | struct lttng_ht_iter iter; | |
2f77fc4b | 3665 | |
cd9adb8b | 3666 | if (session->kernel_session != nullptr) { |
2f77fc4b DG |
3667 | DBG3("Listing domains found kernel domain"); |
3668 | nb_dom++; | |
3669 | } | |
3670 | ||
cd9adb8b | 3671 | if (session->ust_session != nullptr) { |
2f77fc4b DG |
3672 | DBG3("Listing domains found UST global domain"); |
3673 | nb_dom++; | |
3c6a091f | 3674 | |
56047f5a JG |
3675 | lttng::urcu::read_lock_guard read_lock; |
3676 | ||
28ab034a JG |
3677 | cds_lfht_for_each_entry ( |
3678 | session->ust_session->agents->ht, &iter.iter, agt, node.node) { | |
fefd409b DG |
3679 | if (agt->being_used) { |
3680 | nb_dom++; | |
3681 | } | |
3c6a091f | 3682 | } |
2f77fc4b DG |
3683 | } |
3684 | ||
fa64dfb4 JG |
3685 | if (!nb_dom) { |
3686 | goto end; | |
3687 | } | |
3688 | ||
64803277 | 3689 | *domains = calloc<lttng_domain>(nb_dom); |
cd9adb8b | 3690 | if (*domains == nullptr) { |
f73fabfd | 3691 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3692 | goto error; |
3693 | } | |
3694 | ||
cd9adb8b | 3695 | if (session->kernel_session != nullptr) { |
2f77fc4b | 3696 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; |
b5edb9e8 PP |
3697 | |
3698 | /* Kernel session buffer type is always GLOBAL */ | |
3699 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
3700 | ||
2f77fc4b DG |
3701 | index++; |
3702 | } | |
3703 | ||
cd9adb8b | 3704 | if (session->ust_session != nullptr) { |
2f77fc4b | 3705 | (*domains)[index].type = LTTNG_DOMAIN_UST; |
88c5f0d8 | 3706 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 3707 | index++; |
3c6a091f | 3708 | |
56047f5a JG |
3709 | { |
3710 | lttng::urcu::read_lock_guard read_lock; | |
3711 | ||
3712 | cds_lfht_for_each_entry ( | |
3713 | session->ust_session->agents->ht, &iter.iter, agt, node.node) { | |
3714 | if (agt->being_used) { | |
3715 | (*domains)[index].type = agt->domain; | |
3716 | (*domains)[index].buf_type = | |
3717 | session->ust_session->buffer_type; | |
3718 | index++; | |
3719 | } | |
fefd409b | 3720 | } |
3c6a091f | 3721 | } |
2f77fc4b | 3722 | } |
fa64dfb4 | 3723 | end: |
2f77fc4b DG |
3724 | return nb_dom; |
3725 | ||
3726 | error: | |
f73fabfd DG |
3727 | /* Return negative value to differentiate return code */ |
3728 | return -ret; | |
2f77fc4b DG |
3729 | } |
3730 | ||
2f77fc4b DG |
3731 | /* |
3732 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3733 | */ | |
999af9c1 | 3734 | enum lttng_error_code cmd_list_channels(enum lttng_domain_type domain, |
28ab034a JG |
3735 | struct ltt_session *session, |
3736 | struct lttng_payload *payload) | |
2f77fc4b | 3737 | { |
999af9c1 JR |
3738 | int ret = 0; |
3739 | unsigned int i = 0; | |
3740 | struct lttcomm_list_command_header cmd_header = {}; | |
3741 | size_t cmd_header_offset; | |
3742 | enum lttng_error_code ret_code; | |
3743 | ||
3744 | assert(session); | |
3745 | assert(payload); | |
3746 | ||
3747 | DBG("Listing channels for session %s", session->name); | |
3748 | ||
3749 | cmd_header_offset = payload->buffer.size; | |
3750 | ||
3751 | /* Reserve space for command reply header. */ | |
3752 | ret = lttng_dynamic_buffer_set_size(&payload->buffer, | |
28ab034a | 3753 | cmd_header_offset + sizeof(cmd_header)); |
999af9c1 JR |
3754 | if (ret) { |
3755 | ret_code = LTTNG_ERR_NOMEM; | |
3756 | goto end; | |
3757 | } | |
2f77fc4b DG |
3758 | |
3759 | switch (domain) { | |
3760 | case LTTNG_DOMAIN_KERNEL: | |
999af9c1 JR |
3761 | { |
3762 | /* Kernel channels */ | |
3763 | struct ltt_kernel_channel *kchan; | |
cd9adb8b | 3764 | if (session->kernel_session != nullptr) { |
28ab034a JG |
3765 | cds_list_for_each_entry ( |
3766 | kchan, &session->kernel_session->channel_list.head, list) { | |
999af9c1 JR |
3767 | uint64_t discarded_events, lost_packets; |
3768 | struct lttng_channel_extended *extended; | |
3769 | ||
3770 | extended = (struct lttng_channel_extended *) | |
28ab034a | 3771 | kchan->channel->attr.extended.ptr; |
999af9c1 | 3772 | |
28ab034a JG |
3773 | ret = get_kernel_runtime_stats( |
3774 | session, kchan, &discarded_events, &lost_packets); | |
999af9c1 JR |
3775 | if (ret < 0) { |
3776 | ret_code = LTTNG_ERR_UNK; | |
3777 | goto end; | |
3778 | } | |
3779 | ||
3780 | /* | |
3781 | * Update the discarded_events and lost_packets | |
3782 | * count for the channel | |
3783 | */ | |
3784 | extended->discarded_events = discarded_events; | |
3785 | extended->lost_packets = lost_packets; | |
3786 | ||
28ab034a | 3787 | ret = lttng_channel_serialize(kchan->channel, &payload->buffer); |
999af9c1 JR |
3788 | if (ret) { |
3789 | ERR("Failed to serialize lttng_channel: channel name = '%s'", | |
28ab034a | 3790 | kchan->channel->name); |
999af9c1 JR |
3791 | ret_code = LTTNG_ERR_UNK; |
3792 | goto end; | |
3793 | } | |
3794 | ||
3795 | i++; | |
3796 | } | |
c7d620a2 | 3797 | } |
2f77fc4b | 3798 | break; |
999af9c1 | 3799 | } |
2f77fc4b | 3800 | case LTTNG_DOMAIN_UST: |
999af9c1 JR |
3801 | { |
3802 | struct lttng_ht_iter iter; | |
3803 | struct ltt_ust_channel *uchan; | |
3804 | ||
56047f5a JG |
3805 | { |
3806 | lttng::urcu::read_lock_guard read_lock; | |
3807 | ||
3808 | cds_lfht_for_each_entry (session->ust_session->domain_global.channels->ht, | |
3809 | &iter.iter, | |
3810 | uchan, | |
3811 | node.node) { | |
3812 | uint64_t discarded_events = 0, lost_packets = 0; | |
3813 | struct lttng_channel *channel = nullptr; | |
3814 | struct lttng_channel_extended *extended; | |
999af9c1 | 3815 | |
56047f5a JG |
3816 | channel = trace_ust_channel_to_lttng_channel(uchan); |
3817 | if (!channel) { | |
3818 | ret_code = LTTNG_ERR_NOMEM; | |
3819 | goto end; | |
3820 | } | |
999af9c1 | 3821 | |
56047f5a JG |
3822 | extended = (struct lttng_channel_extended *) |
3823 | channel->attr.extended.ptr; | |
999af9c1 | 3824 | |
56047f5a JG |
3825 | ret = get_ust_runtime_stats( |
3826 | session, uchan, &discarded_events, &lost_packets); | |
3827 | if (ret < 0) { | |
3828 | lttng_channel_destroy(channel); | |
3829 | ret_code = LTTNG_ERR_UNK; | |
3830 | goto end; | |
3831 | } | |
3832 | ||
3833 | extended->discarded_events = discarded_events; | |
3834 | extended->lost_packets = lost_packets; | |
3835 | ||
3836 | ret = lttng_channel_serialize(channel, &payload->buffer); | |
3837 | if (ret) { | |
3838 | ERR("Failed to serialize lttng_channel: channel name = '%s'", | |
3839 | channel->name); | |
3840 | lttng_channel_destroy(channel); | |
3841 | ret_code = LTTNG_ERR_UNK; | |
3842 | goto end; | |
3843 | } | |
999af9c1 | 3844 | |
ae2275af | 3845 | lttng_channel_destroy(channel); |
56047f5a | 3846 | i++; |
999af9c1 | 3847 | } |
c7d620a2 | 3848 | } |
56047f5a | 3849 | |
2f77fc4b | 3850 | break; |
999af9c1 | 3851 | } |
2f77fc4b | 3852 | default: |
999af9c1 | 3853 | break; |
2f77fc4b DG |
3854 | } |
3855 | ||
999af9c1 JR |
3856 | if (i > UINT32_MAX) { |
3857 | ERR("Channel count would overflow the channel listing command's reply"); | |
3858 | ret_code = LTTNG_ERR_OVERFLOW; | |
3859 | goto end; | |
2f77fc4b DG |
3860 | } |
3861 | ||
999af9c1 JR |
3862 | /* Update command reply header. */ |
3863 | cmd_header.count = (uint32_t) i; | |
28ab034a | 3864 | memcpy(payload->buffer.data + cmd_header_offset, &cmd_header, sizeof(cmd_header)); |
999af9c1 JR |
3865 | ret_code = LTTNG_OK; |
3866 | ||
53e367f9 | 3867 | end: |
999af9c1 | 3868 | return ret_code; |
2f77fc4b DG |
3869 | } |
3870 | ||
3871 | /* | |
3872 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3873 | */ | |
8ddd72ef | 3874 | enum lttng_error_code cmd_list_events(enum lttng_domain_type domain, |
28ab034a JG |
3875 | struct ltt_session *session, |
3876 | char *channel_name, | |
3877 | struct lttng_payload *reply_payload) | |
2f77fc4b | 3878 | { |
8ddd72ef JR |
3879 | int buffer_resize_ret; |
3880 | enum lttng_error_code ret_code = LTTNG_OK; | |
3881 | struct lttcomm_list_command_header reply_command_header = {}; | |
3882 | size_t reply_command_header_offset; | |
23831239 | 3883 | unsigned int nb_events = 0; |
e368fb43 | 3884 | |
8ddd72ef JR |
3885 | assert(reply_payload); |
3886 | ||
3887 | /* Reserve space for command reply header. */ | |
3888 | reply_command_header_offset = reply_payload->buffer.size; | |
28ab034a JG |
3889 | buffer_resize_ret = lttng_dynamic_buffer_set_size( |
3890 | &reply_payload->buffer, | |
3891 | reply_command_header_offset + sizeof(struct lttcomm_list_command_header)); | |
8ddd72ef JR |
3892 | if (buffer_resize_ret) { |
3893 | ret_code = LTTNG_ERR_NOMEM; | |
3894 | goto end; | |
e368fb43 | 3895 | } |
2f77fc4b DG |
3896 | |
3897 | switch (domain) { | |
3898 | case LTTNG_DOMAIN_KERNEL: | |
cd9adb8b | 3899 | if (session->kernel_session != nullptr) { |
28ab034a JG |
3900 | ret_code = list_lttng_kernel_events( |
3901 | channel_name, session->kernel_session, reply_payload, &nb_events); | |
2f77fc4b | 3902 | } |
8ddd72ef | 3903 | |
2f77fc4b DG |
3904 | break; |
3905 | case LTTNG_DOMAIN_UST: | |
3906 | { | |
cd9adb8b | 3907 | if (session->ust_session != nullptr) { |
28ab034a JG |
3908 | ret_code = |
3909 | list_lttng_ust_global_events(channel_name, | |
3910 | &session->ust_session->domain_global, | |
3911 | reply_payload, | |
3912 | &nb_events); | |
2f77fc4b | 3913 | } |
8ddd72ef | 3914 | |
2f77fc4b DG |
3915 | break; |
3916 | } | |
5cdb6027 | 3917 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3918 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3919 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3920 | if (session->ust_session) { |
fefd409b DG |
3921 | struct lttng_ht_iter iter; |
3922 | struct agent *agt; | |
3923 | ||
56047f5a JG |
3924 | lttng::urcu::read_lock_guard read_lock; |
3925 | ||
28ab034a JG |
3926 | cds_lfht_for_each_entry ( |
3927 | session->ust_session->agents->ht, &iter.iter, agt, node.node) { | |
1dfd9906 | 3928 | if (agt->domain == domain) { |
8ddd72ef | 3929 | ret_code = list_lttng_agent_events( |
28ab034a | 3930 | agt, reply_payload, &nb_events); |
1dfd9906 JG |
3931 | break; |
3932 | } | |
fefd409b | 3933 | } |
3c6a091f DG |
3934 | } |
3935 | break; | |
2f77fc4b | 3936 | default: |
8ddd72ef JR |
3937 | ret_code = LTTNG_ERR_UND; |
3938 | break; | |
2f77fc4b DG |
3939 | } |
3940 | ||
8ddd72ef JR |
3941 | if (nb_events > UINT32_MAX) { |
3942 | ret_code = LTTNG_ERR_OVERFLOW; | |
3943 | goto end; | |
3944 | } | |
e368fb43 | 3945 | |
8ddd72ef JR |
3946 | /* Update command reply header. */ |
3947 | reply_command_header.count = (uint32_t) nb_events; | |
28ab034a JG |
3948 | memcpy(reply_payload->buffer.data + reply_command_header_offset, |
3949 | &reply_command_header, | |
3950 | sizeof(reply_command_header)); | |
2f77fc4b | 3951 | |
8ddd72ef JR |
3952 | end: |
3953 | return ret_code; | |
2f77fc4b DG |
3954 | } |
3955 | ||
3956 | /* | |
3957 | * Using the session list, filled a lttng_session array to send back to the | |
3958 | * client for session listing. | |
3959 | * | |
3960 | * The session list lock MUST be acquired before calling this function. Use | |
3961 | * session_lock_list() and session_unlock_list(). | |
3962 | */ | |
b178f53e | 3963 | void cmd_list_lttng_sessions(struct lttng_session *sessions, |
28ab034a JG |
3964 | size_t session_count, |
3965 | uid_t uid, | |
3966 | gid_t gid) | |
2f77fc4b DG |
3967 | { |
3968 | int ret; | |
3969 | unsigned int i = 0; | |
3970 | struct ltt_session *session; | |
3971 | struct ltt_session_list *list = session_get_list(); | |
28ab034a | 3972 | struct lttng_session_extended *extended = (typeof(extended)) (&sessions[session_count]); |
2f77fc4b | 3973 | |
28ab034a | 3974 | DBG("Getting all available session for UID %d GID %d", uid, gid); |
2f77fc4b DG |
3975 | /* |
3976 | * Iterate over session list and append data after the control struct in | |
3977 | * the buffer. | |
3978 | */ | |
28ab034a | 3979 | cds_list_for_each_entry (session, &list->head, list) { |
e32d7f27 JG |
3980 | if (!session_get(session)) { |
3981 | continue; | |
3982 | } | |
2f77fc4b DG |
3983 | /* |
3984 | * Only list the sessions the user can control. | |
3985 | */ | |
28ab034a | 3986 | if (!session_access_ok(session, uid) || session->destroyed) { |
e32d7f27 | 3987 | session_put(session); |
2f77fc4b DG |
3988 | continue; |
3989 | } | |
3990 | ||
3991 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3992 | struct ltt_ust_session *usess = session->ust_session; | |
3993 | ||
3994 | if (session->consumer->type == CONSUMER_DST_NET || | |
28ab034a JG |
3995 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || |
3996 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3997 | ret = build_network_session_path( | |
3998 | sessions[i].path, sizeof(sessions[i].path), session); | |
2f77fc4b | 3999 | } else { |
28ab034a JG |
4000 | ret = snprintf(sessions[i].path, |
4001 | sizeof(sessions[i].path), | |
4002 | "%s", | |
4003 | session->consumer->dst.session_root_path); | |
2f77fc4b DG |
4004 | } |
4005 | if (ret < 0) { | |
4006 | PERROR("snprintf session path"); | |
e32d7f27 | 4007 | session_put(session); |
2f77fc4b DG |
4008 | continue; |
4009 | } | |
4010 | ||
4011 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
4012 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 4013 | sessions[i].enabled = session->active; |
2cbf8fed | 4014 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 4015 | sessions[i].live_timer_interval = session->live_timer; |
b178f53e JG |
4016 | extended[i].creation_time.value = (uint64_t) session->creation_time; |
4017 | extended[i].creation_time.is_set = 1; | |
2f77fc4b | 4018 | i++; |
e32d7f27 | 4019 | session_put(session); |
2f77fc4b DG |
4020 | } |
4021 | } | |
4022 | ||
806e2684 | 4023 | /* |
6d805429 | 4024 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 4025 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 4026 | */ |
6d805429 | 4027 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
4028 | { |
4029 | int ret; | |
4030 | struct ltt_kernel_session *ksess = session->kernel_session; | |
4031 | struct ltt_ust_session *usess = session->ust_session; | |
4032 | ||
a0377dfe | 4033 | LTTNG_ASSERT(session); |
806e2684 | 4034 | |
5c408ad8 JD |
4035 | DBG("Data pending for session %s", session->name); |
4036 | ||
806e2684 | 4037 | /* Session MUST be stopped to ask for data availability. */ |
8382cf6f | 4038 | if (session->active) { |
806e2684 DG |
4039 | ret = LTTNG_ERR_SESSION_STARTED; |
4040 | goto error; | |
3a89d11a DG |
4041 | } else { |
4042 | /* | |
4043 | * If stopped, just make sure we've started before else the above call | |
4044 | * will always send that there is data pending. | |
4045 | * | |
4046 | * The consumer assumes that when the data pending command is received, | |
4047 | * the trace has been started before or else no output data is written | |
4048 | * by the streams which is a condition for data pending. So, this is | |
4049 | * *VERY* important that we don't ask the consumer before a start | |
4050 | * trace. | |
4051 | */ | |
8382cf6f | 4052 | if (!session->has_been_started) { |
3a89d11a DG |
4053 | ret = 0; |
4054 | goto error; | |
4055 | } | |
806e2684 DG |
4056 | } |
4057 | ||
92816cc3 JG |
4058 | /* A rotation is still pending, we have to wait. */ |
4059 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { | |
5c408ad8 JD |
4060 | DBG("Rotate still pending for session %s", session->name); |
4061 | ret = 1; | |
4062 | goto error; | |
4063 | } | |
4064 | ||
806e2684 | 4065 | if (ksess && ksess->consumer) { |
6d805429 DG |
4066 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
4067 | if (ret == 1) { | |
806e2684 DG |
4068 | /* Data is still being extracted for the kernel. */ |
4069 | goto error; | |
4070 | } | |
4071 | } | |
4072 | ||
4073 | if (usess && usess->consumer) { | |
6d805429 DG |
4074 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
4075 | if (ret == 1) { | |
806e2684 DG |
4076 | /* Data is still being extracted for the kernel. */ |
4077 | goto error; | |
4078 | } | |
4079 | } | |
4080 | ||
4081 | /* Data is ready to be read by a viewer */ | |
6d805429 | 4082 | ret = 0; |
806e2684 DG |
4083 | |
4084 | error: | |
4085 | return ret; | |
4086 | } | |
4087 | ||
6dc3064a DG |
4088 | /* |
4089 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
4090 | * | |
4091 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4092 | */ | |
4093 | int cmd_snapshot_add_output(struct ltt_session *session, | |
28ab034a JG |
4094 | const struct lttng_snapshot_output *output, |
4095 | uint32_t *id) | |
6dc3064a DG |
4096 | { |
4097 | int ret; | |
4098 | struct snapshot_output *new_output; | |
4099 | ||
a0377dfe FD |
4100 | LTTNG_ASSERT(session); |
4101 | LTTNG_ASSERT(output); | |
6dc3064a DG |
4102 | |
4103 | DBG("Cmd snapshot add output for session %s", session->name); | |
4104 | ||
4105 | /* | |
903ef685 | 4106 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
4107 | */ |
4108 | if (session->output_traces) { | |
903ef685 | 4109 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4110 | goto error; |
4111 | } | |
4112 | ||
54213acc JG |
4113 | if (session->has_non_mmap_channel) { |
4114 | ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED; | |
4115 | goto error; | |
4116 | } | |
4117 | ||
6dc3064a DG |
4118 | /* Only one output is allowed until we have the "tee" feature. */ |
4119 | if (session->snapshot.nb_output == 1) { | |
4120 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
4121 | goto error; | |
4122 | } | |
4123 | ||
4124 | new_output = snapshot_output_alloc(); | |
4125 | if (!new_output) { | |
4126 | ret = LTTNG_ERR_NOMEM; | |
4127 | goto error; | |
4128 | } | |
4129 | ||
28ab034a JG |
4130 | ret = snapshot_output_init(session, |
4131 | output->max_size, | |
4132 | output->name, | |
4133 | output->ctrl_url, | |
4134 | output->data_url, | |
4135 | session->consumer, | |
4136 | new_output, | |
4137 | &session->snapshot); | |
6dc3064a DG |
4138 | if (ret < 0) { |
4139 | if (ret == -ENOMEM) { | |
4140 | ret = LTTNG_ERR_NOMEM; | |
4141 | } else { | |
4142 | ret = LTTNG_ERR_INVALID; | |
4143 | } | |
4144 | goto free_error; | |
4145 | } | |
4146 | ||
6dc3064a DG |
4147 | snapshot_add_output(&session->snapshot, new_output); |
4148 | if (id) { | |
4149 | *id = new_output->id; | |
4150 | } | |
6dc3064a DG |
4151 | |
4152 | return LTTNG_OK; | |
4153 | ||
4154 | free_error: | |
4155 | snapshot_output_destroy(new_output); | |
4156 | error: | |
4157 | return ret; | |
4158 | } | |
4159 | ||
4160 | /* | |
4161 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
4162 | * | |
4163 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4164 | */ | |
28ab034a | 4165 | int cmd_snapshot_del_output(struct ltt_session *session, const struct lttng_snapshot_output *output) |
6dc3064a DG |
4166 | { |
4167 | int ret; | |
cd9adb8b | 4168 | struct snapshot_output *sout = nullptr; |
6dc3064a | 4169 | |
a0377dfe FD |
4170 | LTTNG_ASSERT(session); |
4171 | LTTNG_ASSERT(output); | |
6dc3064a | 4172 | |
56047f5a | 4173 | lttng::urcu::read_lock_guard read_lock; |
6dc3064a DG |
4174 | |
4175 | /* | |
d3f14b8a MD |
4176 | * Permission denied to create an output if the session is not |
4177 | * set in no output mode. | |
6dc3064a DG |
4178 | */ |
4179 | if (session->output_traces) { | |
903ef685 | 4180 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4181 | goto error; |
4182 | } | |
4183 | ||
eb240553 | 4184 | if (output->id) { |
28ab034a JG |
4185 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", |
4186 | output->id, | |
4187 | session->name); | |
eb240553 DG |
4188 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); |
4189 | } else if (*output->name != '\0') { | |
28ab034a | 4190 | DBG("Cmd snapshot del output name %s for session %s", output->name, session->name); |
eb240553 DG |
4191 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); |
4192 | } | |
6dc3064a DG |
4193 | if (!sout) { |
4194 | ret = LTTNG_ERR_INVALID; | |
4195 | goto error; | |
4196 | } | |
4197 | ||
4198 | snapshot_delete_output(&session->snapshot, sout); | |
4199 | snapshot_output_destroy(sout); | |
4200 | ret = LTTNG_OK; | |
4201 | ||
4202 | error: | |
6dc3064a DG |
4203 | return ret; |
4204 | } | |
4205 | ||
4206 | /* | |
4207 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
4208 | * | |
4209 | * If no output is available, outputs is untouched and 0 is returned. | |
4210 | * | |
4211 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
4212 | */ | |
4213 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
28ab034a | 4214 | struct lttng_snapshot_output **outputs) |
6dc3064a DG |
4215 | { |
4216 | int ret, idx = 0; | |
cd9adb8b | 4217 | struct lttng_snapshot_output *list = nullptr; |
6dc3064a DG |
4218 | struct lttng_ht_iter iter; |
4219 | struct snapshot_output *output; | |
4220 | ||
a0377dfe FD |
4221 | LTTNG_ASSERT(session); |
4222 | LTTNG_ASSERT(outputs); | |
6dc3064a DG |
4223 | |
4224 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
4225 | ||
4226 | /* | |
d3f14b8a MD |
4227 | * Permission denied to create an output if the session is not |
4228 | * set in no output mode. | |
6dc3064a DG |
4229 | */ |
4230 | if (session->output_traces) { | |
903ef685 JG |
4231 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
4232 | goto end; | |
6dc3064a DG |
4233 | } |
4234 | ||
4235 | if (session->snapshot.nb_output == 0) { | |
4236 | ret = 0; | |
903ef685 | 4237 | goto end; |
6dc3064a DG |
4238 | } |
4239 | ||
64803277 | 4240 | list = calloc<lttng_snapshot_output>(session->snapshot.nb_output); |
6dc3064a | 4241 | if (!list) { |
b223ca94 | 4242 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4243 | goto end; |
6dc3064a DG |
4244 | } |
4245 | ||
4246 | /* Copy list from session to the new list object. */ | |
56047f5a JG |
4247 | { |
4248 | lttng::urcu::read_lock_guard read_lock; | |
4249 | ||
4250 | cds_lfht_for_each_entry ( | |
4251 | session->snapshot.output_ht->ht, &iter.iter, output, node.node) { | |
4252 | LTTNG_ASSERT(output->consumer); | |
4253 | list[idx].id = output->id; | |
4254 | list[idx].max_size = output->max_size; | |
4255 | if (lttng_strncpy(list[idx].name, output->name, sizeof(list[idx].name))) { | |
6ce22875 | 4256 | ret = -LTTNG_ERR_INVALID; |
903ef685 | 4257 | goto error; |
6ce22875 | 4258 | } |
6dc3064a | 4259 | |
56047f5a JG |
4260 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
4261 | if (lttng_strncpy(list[idx].ctrl_url, | |
4262 | output->consumer->dst.session_root_path, | |
4263 | sizeof(list[idx].ctrl_url))) { | |
4264 | ret = -LTTNG_ERR_INVALID; | |
4265 | goto error; | |
4266 | } | |
4267 | } else { | |
4268 | /* Control URI. */ | |
4269 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
4270 | list[idx].ctrl_url, | |
4271 | sizeof(list[idx].ctrl_url)); | |
4272 | if (ret < 0) { | |
4273 | ret = -LTTNG_ERR_NOMEM; | |
4274 | goto error; | |
4275 | } | |
4276 | ||
4277 | /* Data URI. */ | |
4278 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
4279 | list[idx].data_url, | |
4280 | sizeof(list[idx].data_url)); | |
4281 | if (ret < 0) { | |
4282 | ret = -LTTNG_ERR_NOMEM; | |
4283 | goto error; | |
4284 | } | |
6dc3064a | 4285 | } |
56047f5a JG |
4286 | |
4287 | idx++; | |
6dc3064a | 4288 | } |
6dc3064a DG |
4289 | } |
4290 | ||
4291 | *outputs = list; | |
cd9adb8b | 4292 | list = nullptr; |
b223ca94 | 4293 | ret = session->snapshot.nb_output; |
6dc3064a | 4294 | error: |
b223ca94 | 4295 | free(list); |
903ef685 | 4296 | end: |
b223ca94 | 4297 | return ret; |
6dc3064a DG |
4298 | } |
4299 | ||
93ec662e JD |
4300 | /* |
4301 | * Check if we can regenerate the metadata for this session. | |
4302 | * Only kernel, UST per-uid and non-live sessions are supported. | |
4303 | * | |
4304 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
4305 | */ | |
28ab034a | 4306 | static int check_regenerate_metadata_support(struct ltt_session *session) |
93ec662e JD |
4307 | { |
4308 | int ret; | |
4309 | ||
a0377dfe | 4310 | LTTNG_ASSERT(session); |
93ec662e JD |
4311 | |
4312 | if (session->live_timer != 0) { | |
4313 | ret = LTTNG_ERR_LIVE_SESSION; | |
4314 | goto end; | |
4315 | } | |
4316 | if (!session->active) { | |
4317 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4318 | goto end; | |
4319 | } | |
4320 | if (session->ust_session) { | |
4321 | switch (session->ust_session->buffer_type) { | |
4322 | case LTTNG_BUFFER_PER_UID: | |
4323 | break; | |
4324 | case LTTNG_BUFFER_PER_PID: | |
4325 | ret = LTTNG_ERR_PER_PID_SESSION; | |
4326 | goto end; | |
4327 | default: | |
a0377dfe | 4328 | abort(); |
93ec662e JD |
4329 | ret = LTTNG_ERR_UNK; |
4330 | goto end; | |
4331 | } | |
4332 | } | |
4333 | if (session->consumer->type == CONSUMER_DST_NET && | |
28ab034a | 4334 | session->consumer->relay_minor_version < 8) { |
93ec662e JD |
4335 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
4336 | goto end; | |
4337 | } | |
4338 | ret = 0; | |
4339 | ||
4340 | end: | |
4341 | return ret; | |
4342 | } | |
4343 | ||
93ec662e | 4344 | /* |
eded6438 | 4345 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
4346 | * |
4347 | * Ask the consumer to truncate the existing metadata file(s) and | |
4348 | * then regenerate the metadata. Live and per-pid sessions are not | |
4349 | * supported and return an error. | |
4350 | * | |
1136f41b | 4351 | * Return LTTNG_OK on success or else a LTTNG_ERR code. |
93ec662e | 4352 | */ |
eded6438 | 4353 | int cmd_regenerate_metadata(struct ltt_session *session) |
93ec662e JD |
4354 | { |
4355 | int ret; | |
4356 | ||
a0377dfe | 4357 | LTTNG_ASSERT(session); |
93ec662e | 4358 | |
eded6438 | 4359 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
4360 | if (ret) { |
4361 | goto end; | |
4362 | } | |
4363 | ||
4364 | if (session->kernel_session) { | |
28ab034a | 4365 | ret = kernctl_session_regenerate_metadata(session->kernel_session->fd); |
93ec662e JD |
4366 | if (ret < 0) { |
4367 | ERR("Failed to regenerate the kernel metadata"); | |
4368 | goto end; | |
4369 | } | |
4370 | } | |
4371 | ||
4372 | if (session->ust_session) { | |
d7bfb9b0 | 4373 | ret = trace_ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
4374 | if (ret < 0) { |
4375 | ERR("Failed to regenerate the UST metadata"); | |
4376 | goto end; | |
4377 | } | |
4378 | } | |
4379 | DBG("Cmd metadata regenerate for session %s", session->name); | |
4380 | ret = LTTNG_OK; | |
4381 | ||
4382 | end: | |
4383 | return ret; | |
4384 | } | |
4385 | ||
c2561365 JD |
4386 | /* |
4387 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
4388 | * | |
4389 | * Ask the tracer to regenerate a new statedump. | |
4390 | * | |
1136f41b | 4391 | * Return LTTNG_OK on success or else a LTTNG_ERR code. |
c2561365 JD |
4392 | */ |
4393 | int cmd_regenerate_statedump(struct ltt_session *session) | |
4394 | { | |
4395 | int ret; | |
4396 | ||
a0377dfe | 4397 | LTTNG_ASSERT(session); |
c2561365 JD |
4398 | |
4399 | if (!session->active) { | |
4400 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4401 | goto end; | |
4402 | } | |
c2561365 JD |
4403 | |
4404 | if (session->kernel_session) { | |
28ab034a | 4405 | ret = kernctl_session_regenerate_statedump(session->kernel_session->fd); |
c2561365 JD |
4406 | /* |
4407 | * Currently, the statedump in kernel can only fail if out | |
4408 | * of memory. | |
4409 | */ | |
4410 | if (ret < 0) { | |
4411 | if (ret == -ENOMEM) { | |
4412 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
4413 | } else { | |
4414 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4415 | } | |
4416 | ERR("Failed to regenerate the kernel statedump"); | |
4417 | goto end; | |
4418 | } | |
4419 | } | |
4420 | ||
4421 | if (session->ust_session) { | |
4422 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
4423 | /* | |
4424 | * Currently, the statedump in UST always returns 0. | |
4425 | */ | |
4426 | if (ret < 0) { | |
4427 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4428 | ERR("Failed to regenerate the UST statedump"); | |
4429 | goto end; | |
4430 | } | |
4431 | } | |
4432 | DBG("Cmd regenerate statedump for session %s", session->name); | |
4433 | ret = LTTNG_OK; | |
4434 | ||
4435 | end: | |
4436 | return ret; | |
4437 | } | |
4438 | ||
28ab034a JG |
4439 | static enum lttng_error_code |
4440 | synchronize_tracer_notifier_register(struct notification_thread_handle *notification_thread, | |
4441 | struct lttng_trigger *trigger, | |
4442 | const struct lttng_credentials *cmd_creds) | |
70670472 | 4443 | { |
989a0844 | 4444 | enum lttng_error_code ret_code; |
28ab034a | 4445 | const struct lttng_condition *condition = lttng_trigger_get_const_condition(trigger); |
989a0844 FD |
4446 | const char *trigger_name; |
4447 | uid_t trigger_owner; | |
4448 | enum lttng_trigger_status trigger_status; | |
4449 | const enum lttng_domain_type trigger_domain = | |
28ab034a | 4450 | lttng_trigger_get_underlying_domain_type_restriction(trigger); |
70670472 | 4451 | |
989a0844 | 4452 | trigger_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner); |
a0377dfe | 4453 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
989a0844 | 4454 | |
a0377dfe FD |
4455 | LTTNG_ASSERT(condition); |
4456 | LTTNG_ASSERT(lttng_condition_get_type(condition) == | |
28ab034a | 4457 | LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES); |
989a0844 FD |
4458 | |
4459 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
28ab034a | 4460 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
989a0844 FD |
4461 | |
4462 | session_lock_list(); | |
4463 | switch (trigger_domain) { | |
4464 | case LTTNG_DOMAIN_KERNEL: | |
4465 | { | |
4466 | ret_code = kernel_register_event_notifier(trigger, cmd_creds); | |
4467 | if (ret_code != LTTNG_OK) { | |
4468 | enum lttng_error_code notif_thread_unregister_ret; | |
4469 | ||
4470 | notif_thread_unregister_ret = | |
28ab034a JG |
4471 | notification_thread_command_unregister_trigger(notification_thread, |
4472 | trigger); | |
989a0844 FD |
4473 | |
4474 | if (notif_thread_unregister_ret != LTTNG_OK) { | |
4475 | /* Return the original error code. */ | |
4476 | ERR("Failed to unregister trigger from notification thread during error recovery: trigger name = '%s', trigger owner uid = %d, error code = %d", | |
28ab034a JG |
4477 | trigger_name, |
4478 | (int) trigger_owner, | |
4479 | ret_code); | |
989a0844 | 4480 | } |
7ebbf3f0 JG |
4481 | |
4482 | goto end_unlock_session_list; | |
989a0844 FD |
4483 | } |
4484 | break; | |
70670472 | 4485 | } |
989a0844 FD |
4486 | case LTTNG_DOMAIN_UST: |
4487 | ust_app_global_update_all_event_notifier_rules(); | |
4488 | break; | |
4489 | case LTTNG_DOMAIN_JUL: | |
4490 | case LTTNG_DOMAIN_LOG4J: | |
4491 | case LTTNG_DOMAIN_PYTHON: | |
4492 | { | |
4493 | /* Agent domains. */ | |
28ab034a | 4494 | struct agent *agt = agent_find_by_event_notifier_domain(trigger_domain); |
70670472 | 4495 | |
989a0844 FD |
4496 | if (!agt) { |
4497 | agt = agent_create(trigger_domain); | |
4498 | if (!agt) { | |
4499 | ret_code = LTTNG_ERR_NOMEM; | |
4500 | goto end_unlock_session_list; | |
4501 | } | |
4502 | ||
412d7227 | 4503 | agent_add(agt, the_trigger_agents_ht_by_domain); |
989a0844 FD |
4504 | } |
4505 | ||
7966af57 | 4506 | ret_code = (lttng_error_code) trigger_agent_enable(trigger, agt); |
989a0844 FD |
4507 | if (ret_code != LTTNG_OK) { |
4508 | goto end_unlock_session_list; | |
4509 | } | |
4510 | ||
4511 | break; | |
4512 | } | |
4513 | case LTTNG_DOMAIN_NONE: | |
4514 | default: | |
4515 | abort(); | |
4516 | } | |
4517 | ||
4518 | ret_code = LTTNG_OK; | |
4519 | end_unlock_session_list: | |
4520 | session_unlock_list(); | |
70670472 JR |
4521 | return ret_code; |
4522 | } | |
4523 | ||
4524 | enum lttng_error_code cmd_register_trigger(const struct lttng_credentials *cmd_creds, | |
28ab034a JG |
4525 | struct lttng_trigger *trigger, |
4526 | bool is_trigger_anonymous, | |
4527 | struct notification_thread_handle *notification_thread, | |
4528 | struct lttng_trigger **return_trigger) | |
b0880ae5 | 4529 | { |
70670472 | 4530 | enum lttng_error_code ret_code; |
70670472 JR |
4531 | const char *trigger_name; |
4532 | uid_t trigger_owner; | |
4533 | enum lttng_trigger_status trigger_status; | |
4534 | ||
4535 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
28ab034a | 4536 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
ce0b1d61 | 4537 | |
28ab034a | 4538 | trigger_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner); |
a0377dfe | 4539 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
70670472 JR |
4540 | |
4541 | DBG("Running register trigger command: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", | |
28ab034a JG |
4542 | trigger_name, |
4543 | (int) trigger_owner, | |
4544 | (int) lttng_credentials_get_uid(cmd_creds)); | |
b0880ae5 | 4545 | |
64eafdf6 JR |
4546 | /* |
4547 | * Validate the trigger credentials against the command credentials. | |
4548 | * Only the root user can register a trigger with non-matching | |
4549 | * credentials. | |
4550 | */ | |
28ab034a | 4551 | if (!lttng_credentials_is_equal_uid(lttng_trigger_get_credentials(trigger), cmd_creds)) { |
746e08d7 | 4552 | if (lttng_credentials_get_uid(cmd_creds) != 0) { |
70670472 | 4553 | ERR("Trigger credentials do not match the command credentials: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", |
28ab034a JG |
4554 | trigger_name, |
4555 | (int) trigger_owner, | |
4556 | (int) lttng_credentials_get_uid(cmd_creds)); | |
70670472 | 4557 | ret_code = LTTNG_ERR_INVALID_TRIGGER; |
64eafdf6 JR |
4558 | goto end; |
4559 | } | |
4560 | } | |
3da864a9 | 4561 | |
58daac01 JR |
4562 | /* |
4563 | * The bytecode generation also serves as a validation step for the | |
4564 | * bytecode expressions. | |
4565 | */ | |
70670472 JR |
4566 | ret_code = lttng_trigger_generate_bytecode(trigger, cmd_creds); |
4567 | if (ret_code != LTTNG_OK) { | |
4568 | ERR("Failed to generate bytecode of trigger: trigger name = '%s', trigger owner uid = %d, error code = %d", | |
28ab034a JG |
4569 | trigger_name, |
4570 | (int) trigger_owner, | |
4571 | ret_code); | |
58daac01 JR |
4572 | goto end; |
4573 | } | |
4574 | ||
242388e4 JR |
4575 | /* |
4576 | * A reference to the trigger is acquired by the notification thread. | |
4577 | * It is safe to return the same trigger to the caller since it the | |
4578 | * other user holds a reference. | |
4579 | * | |
4580 | * The trigger is modified during the execution of the | |
4581 | * "register trigger" command. However, by the time the command returns, | |
4582 | * it is safe to use without any locking as its properties are | |
4583 | * immutable. | |
4584 | */ | |
0efb2ad7 | 4585 | ret_code = notification_thread_command_register_trigger( |
28ab034a | 4586 | notification_thread, trigger, is_trigger_anonymous); |
70670472 | 4587 | if (ret_code != LTTNG_OK) { |
ce0b1d61 | 4588 | DBG("Failed to register trigger to notification thread: trigger name = '%s', trigger owner uid = %d, error code = %d", |
28ab034a JG |
4589 | trigger_name, |
4590 | (int) trigger_owner, | |
4591 | ret_code); | |
44760c20 | 4592 | goto end; |
70670472 JR |
4593 | } |
4594 | ||
ce0b1d61 | 4595 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); |
28ab034a | 4596 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
ce0b1d61 | 4597 | |
70670472 JR |
4598 | /* |
4599 | * Synchronize tracers if the trigger adds an event notifier. | |
4600 | */ | |
989a0844 | 4601 | if (lttng_trigger_needs_tracer_notifier(trigger)) { |
28ab034a JG |
4602 | ret_code = synchronize_tracer_notifier_register( |
4603 | notification_thread, trigger, cmd_creds); | |
989a0844 | 4604 | if (ret_code != LTTNG_OK) { |
28ab034a | 4605 | ERR("Error registering tracer notifier: %s", lttng_strerror(-ret_code)); |
989a0844 | 4606 | goto end; |
70670472 JR |
4607 | } |
4608 | } | |
4609 | ||
746e08d7 JG |
4610 | /* |
4611 | * Return an updated trigger to the client. | |
4612 | * | |
4613 | * Since a modified version of the same trigger is returned, acquire a | |
4614 | * reference to the trigger so the caller doesn't have to care if those | |
4615 | * are distinct instances or not. | |
4616 | */ | |
39b95a70 JG |
4617 | if (ret_code == LTTNG_OK) { |
4618 | lttng_trigger_get(trigger); | |
4619 | *return_trigger = trigger; | |
4620 | /* Ownership of trigger was transferred to caller. */ | |
cd9adb8b | 4621 | trigger = nullptr; |
39b95a70 | 4622 | } |
b0880ae5 | 4623 | end: |
70670472 | 4624 | return ret_code; |
989a0844 FD |
4625 | } |
4626 | ||
28ab034a JG |
4627 | static enum lttng_error_code |
4628 | synchronize_tracer_notifier_unregister(const struct lttng_trigger *trigger) | |
989a0844 FD |
4629 | { |
4630 | enum lttng_error_code ret_code; | |
28ab034a | 4631 | const struct lttng_condition *condition = lttng_trigger_get_const_condition(trigger); |
989a0844 | 4632 | const enum lttng_domain_type trigger_domain = |
28ab034a | 4633 | lttng_trigger_get_underlying_domain_type_restriction(trigger); |
989a0844 | 4634 | |
a0377dfe FD |
4635 | LTTNG_ASSERT(condition); |
4636 | LTTNG_ASSERT(lttng_condition_get_type(condition) == | |
28ab034a | 4637 | LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES); |
989a0844 FD |
4638 | |
4639 | session_lock_list(); | |
4640 | switch (trigger_domain) { | |
4641 | case LTTNG_DOMAIN_KERNEL: | |
4642 | ret_code = kernel_unregister_event_notifier(trigger); | |
e689039f JG |
4643 | if (ret_code != LTTNG_OK) { |
4644 | goto end_unlock_session_list; | |
4645 | } | |
4646 | ||
989a0844 FD |
4647 | break; |
4648 | case LTTNG_DOMAIN_UST: | |
4649 | ust_app_global_update_all_event_notifier_rules(); | |
4650 | break; | |
4651 | case LTTNG_DOMAIN_JUL: | |
4652 | case LTTNG_DOMAIN_LOG4J: | |
4653 | case LTTNG_DOMAIN_PYTHON: | |
4654 | { | |
4655 | /* Agent domains. */ | |
28ab034a | 4656 | struct agent *agt = agent_find_by_event_notifier_domain(trigger_domain); |
989a0844 | 4657 | |
566190c4 JG |
4658 | /* |
4659 | * This trigger was never registered in the first place. Calling | |
4660 | * this function under those circumstances is an internal error. | |
4661 | */ | |
a0377dfe | 4662 | LTTNG_ASSERT(agt); |
7966af57 | 4663 | ret_code = (lttng_error_code) trigger_agent_disable(trigger, agt); |
989a0844 FD |
4664 | if (ret_code != LTTNG_OK) { |
4665 | goto end_unlock_session_list; | |
4666 | } | |
4667 | ||
4668 | break; | |
4669 | } | |
4670 | case LTTNG_DOMAIN_NONE: | |
4671 | default: | |
4672 | abort(); | |
4673 | } | |
4674 | ||
4675 | ret_code = LTTNG_OK; | |
4676 | ||
9b7cbebd JG |
4677 | end_unlock_session_list: |
4678 | session_unlock_list(); | |
4679 | return ret_code; | |
b0880ae5 JG |
4680 | } |
4681 | ||
70670472 | 4682 | enum lttng_error_code cmd_unregister_trigger(const struct lttng_credentials *cmd_creds, |
28ab034a JG |
4683 | const struct lttng_trigger *trigger, |
4684 | struct notification_thread_handle *notification_thread) | |
b0880ae5 | 4685 | { |
70670472 | 4686 | enum lttng_error_code ret_code; |
70670472 JR |
4687 | const char *trigger_name; |
4688 | uid_t trigger_owner; | |
4689 | enum lttng_trigger_status trigger_status; | |
cd9adb8b | 4690 | struct lttng_trigger *sessiond_trigger = nullptr; |
70670472 JR |
4691 | |
4692 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
0efb2ad7 | 4693 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
989a0844 | 4694 | trigger_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner); |
a0377dfe | 4695 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
70670472 JR |
4696 | |
4697 | DBG("Running unregister trigger command: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", | |
28ab034a JG |
4698 | trigger_name, |
4699 | (int) trigger_owner, | |
4700 | (int) lttng_credentials_get_uid(cmd_creds)); | |
b0880ae5 | 4701 | |
64eafdf6 JR |
4702 | /* |
4703 | * Validate the trigger credentials against the command credentials. | |
4704 | * Only the root user can unregister a trigger with non-matching | |
4705 | * credentials. | |
4706 | */ | |
28ab034a | 4707 | if (!lttng_credentials_is_equal_uid(lttng_trigger_get_credentials(trigger), cmd_creds)) { |
746e08d7 | 4708 | if (lttng_credentials_get_uid(cmd_creds) != 0) { |
70670472 | 4709 | ERR("Trigger credentials do not match the command credentials: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", |
28ab034a JG |
4710 | trigger_name, |
4711 | (int) trigger_owner, | |
4712 | (int) lttng_credentials_get_uid(cmd_creds)); | |
70670472 | 4713 | ret_code = LTTNG_ERR_INVALID_TRIGGER; |
64eafdf6 JR |
4714 | goto end; |
4715 | } | |
4716 | } | |
3da864a9 | 4717 | |
5c5373c3 JR |
4718 | /* Fetch the sessiond side trigger object. */ |
4719 | ret_code = notification_thread_command_get_trigger( | |
28ab034a | 4720 | notification_thread, trigger, &sessiond_trigger); |
5c5373c3 JR |
4721 | if (ret_code != LTTNG_OK) { |
4722 | DBG("Failed to get trigger from notification thread during unregister: trigger name = '%s', trigger owner uid = %d, error code = %d", | |
28ab034a JG |
4723 | trigger_name, |
4724 | (int) trigger_owner, | |
4725 | ret_code); | |
5c5373c3 JR |
4726 | goto end; |
4727 | } | |
4728 | ||
a0377dfe | 4729 | LTTNG_ASSERT(sessiond_trigger); |
5c5373c3 JR |
4730 | |
4731 | /* | |
4732 | * From this point on, no matter what, consider the trigger | |
4733 | * unregistered. | |
4734 | * | |
4735 | * We set the unregistered state of the sessiond side trigger object in | |
4736 | * the client thread since we want to minimize the possibility of the | |
4737 | * notification thread being stalled due to a long execution of an | |
4738 | * action that required the trigger lock. | |
4739 | */ | |
4740 | lttng_trigger_set_as_unregistered(sessiond_trigger); | |
4741 | ||
28ab034a | 4742 | ret_code = notification_thread_command_unregister_trigger(notification_thread, trigger); |
70670472 | 4743 | if (ret_code != LTTNG_OK) { |
ce0b1d61 | 4744 | DBG("Failed to unregister trigger from notification thread: trigger name = '%s', trigger owner uid = %d, error code = %d", |
28ab034a JG |
4745 | trigger_name, |
4746 | (int) trigger_owner, | |
4747 | ret_code); | |
13839b27 | 4748 | goto end; |
70670472 JR |
4749 | } |
4750 | ||
4751 | /* | |
4752 | * Synchronize tracers if the trigger removes an event notifier. | |
44760c20 JR |
4753 | * Do this even if the trigger unregistration failed to at least stop |
4754 | * the tracers from producing notifications associated with this | |
4755 | * event notifier. | |
70670472 | 4756 | */ |
989a0844 FD |
4757 | if (lttng_trigger_needs_tracer_notifier(trigger)) { |
4758 | ret_code = synchronize_tracer_notifier_unregister(trigger); | |
4759 | if (ret_code != LTTNG_OK) { | |
4760 | ERR("Error unregistering trigger to tracer."); | |
4761 | goto end; | |
70670472 JR |
4762 | } |
4763 | } | |
4764 | ||
b0880ae5 | 4765 | end: |
5c5373c3 | 4766 | lttng_trigger_put(sessiond_trigger); |
70670472 | 4767 | return ret_code; |
989a0844 | 4768 | } |
b0880ae5 | 4769 | |
ddd915a3 | 4770 | enum lttng_error_code cmd_list_triggers(struct command_ctx *cmd_ctx, |
28ab034a JG |
4771 | struct notification_thread_handle *notification_thread, |
4772 | struct lttng_triggers **return_triggers) | |
fbc9f37d | 4773 | { |
f2bda80e | 4774 | int ret; |
fbc9f37d | 4775 | enum lttng_error_code ret_code; |
cd9adb8b | 4776 | struct lttng_triggers *triggers = nullptr; |
fbc9f37d JR |
4777 | |
4778 | /* Get the set of triggers from the notification thread. */ | |
4779 | ret_code = notification_thread_command_list_triggers( | |
28ab034a | 4780 | notification_thread, cmd_ctx->creds.uid, &triggers); |
fbc9f37d | 4781 | if (ret_code != LTTNG_OK) { |
fbc9f37d JR |
4782 | goto end; |
4783 | } | |
4784 | ||
f2bda80e JG |
4785 | ret = lttng_triggers_remove_hidden_triggers(triggers); |
4786 | if (ret) { | |
4787 | ret_code = LTTNG_ERR_UNK; | |
4788 | goto end; | |
4789 | } | |
4790 | ||
fbc9f37d | 4791 | *return_triggers = triggers; |
cd9adb8b | 4792 | triggers = nullptr; |
ddd915a3 | 4793 | ret_code = LTTNG_OK; |
fbc9f37d JR |
4794 | end: |
4795 | lttng_triggers_destroy(triggers); | |
ddd915a3 | 4796 | return ret_code; |
fbc9f37d | 4797 | } |
588c4b0d | 4798 | |
28ab034a JG |
4799 | enum lttng_error_code |
4800 | cmd_execute_error_query(const struct lttng_credentials *cmd_creds, | |
4801 | const struct lttng_error_query *query, | |
4802 | struct lttng_error_query_results **_results, | |
4803 | struct notification_thread_handle *notification_thread) | |
588c4b0d JG |
4804 | { |
4805 | enum lttng_error_code ret_code; | |
4806 | const struct lttng_trigger *query_target_trigger; | |
cd9adb8b JG |
4807 | const struct lttng_action *query_target_action = nullptr; |
4808 | struct lttng_trigger *matching_trigger = nullptr; | |
588c4b0d JG |
4809 | const char *trigger_name; |
4810 | uid_t trigger_owner; | |
4811 | enum lttng_trigger_status trigger_status; | |
cd9adb8b | 4812 | struct lttng_error_query_results *results = nullptr; |
588c4b0d JG |
4813 | |
4814 | switch (lttng_error_query_get_target_type(query)) { | |
4815 | case LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER: | |
4816 | query_target_trigger = lttng_error_query_trigger_borrow_target(query); | |
4817 | break; | |
63dd3d7b | 4818 | case LTTNG_ERROR_QUERY_TARGET_TYPE_CONDITION: |
28ab034a | 4819 | query_target_trigger = lttng_error_query_condition_borrow_target(query); |
63dd3d7b | 4820 | break; |
588c4b0d | 4821 | case LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION: |
28ab034a | 4822 | query_target_trigger = lttng_error_query_action_borrow_trigger_target(query); |
588c4b0d JG |
4823 | break; |
4824 | default: | |
4825 | abort(); | |
4826 | } | |
4827 | ||
a0377dfe | 4828 | LTTNG_ASSERT(query_target_trigger); |
588c4b0d | 4829 | |
28ab034a JG |
4830 | ret_code = notification_thread_command_get_trigger( |
4831 | notification_thread, query_target_trigger, &matching_trigger); | |
588c4b0d JG |
4832 | if (ret_code != LTTNG_OK) { |
4833 | goto end; | |
4834 | } | |
4835 | ||
4836 | /* No longer needed. */ | |
cd9adb8b | 4837 | query_target_trigger = nullptr; |
588c4b0d | 4838 | |
28ab034a | 4839 | if (lttng_error_query_get_target_type(query) == LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION) { |
588c4b0d JG |
4840 | /* Get the sessiond-side version of the target action. */ |
4841 | query_target_action = | |
28ab034a | 4842 | lttng_error_query_action_borrow_action_target(query, matching_trigger); |
588c4b0d JG |
4843 | } |
4844 | ||
4845 | trigger_status = lttng_trigger_get_name(matching_trigger, &trigger_name); | |
28ab034a JG |
4846 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
4847 | trigger_status = lttng_trigger_get_owner_uid(matching_trigger, &trigger_owner); | |
a0377dfe | 4848 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
588c4b0d JG |
4849 | |
4850 | results = lttng_error_query_results_create(); | |
4851 | if (!results) { | |
4852 | ret_code = LTTNG_ERR_NOMEM; | |
4853 | goto end; | |
4854 | } | |
4855 | ||
4856 | DBG("Running \"execute error query\" command: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", | |
28ab034a JG |
4857 | trigger_name, |
4858 | (int) trigger_owner, | |
4859 | (int) lttng_credentials_get_uid(cmd_creds)); | |
588c4b0d JG |
4860 | |
4861 | /* | |
4862 | * Validate the trigger credentials against the command credentials. | |
4863 | * Only the root user can target a trigger with non-matching | |
4864 | * credentials. | |
4865 | */ | |
28ab034a JG |
4866 | if (!lttng_credentials_is_equal_uid(lttng_trigger_get_credentials(matching_trigger), |
4867 | cmd_creds)) { | |
588c4b0d JG |
4868 | if (lttng_credentials_get_uid(cmd_creds) != 0) { |
4869 | ERR("Trigger credentials do not match the command credentials: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", | |
28ab034a JG |
4870 | trigger_name, |
4871 | (int) trigger_owner, | |
4872 | (int) lttng_credentials_get_uid(cmd_creds)); | |
588c4b0d JG |
4873 | ret_code = LTTNG_ERR_INVALID_TRIGGER; |
4874 | goto end; | |
4875 | } | |
4876 | } | |
4877 | ||
4878 | switch (lttng_error_query_get_target_type(query)) { | |
4879 | case LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER: | |
28ab034a | 4880 | trigger_status = lttng_trigger_add_error_results(matching_trigger, results); |
588c4b0d JG |
4881 | |
4882 | switch (trigger_status) { | |
4883 | case LTTNG_TRIGGER_STATUS_OK: | |
4884 | break; | |
4885 | default: | |
4886 | ret_code = LTTNG_ERR_UNK; | |
4887 | goto end; | |
4888 | } | |
4889 | ||
4890 | break; | |
63dd3d7b JG |
4891 | case LTTNG_ERROR_QUERY_TARGET_TYPE_CONDITION: |
4892 | { | |
28ab034a JG |
4893 | trigger_status = |
4894 | lttng_trigger_condition_add_error_results(matching_trigger, results); | |
63dd3d7b JG |
4895 | |
4896 | switch (trigger_status) { | |
4897 | case LTTNG_TRIGGER_STATUS_OK: | |
4898 | break; | |
4899 | default: | |
4900 | ret_code = LTTNG_ERR_UNK; | |
4901 | goto end; | |
4902 | } | |
4903 | ||
4904 | break; | |
4905 | } | |
588c4b0d JG |
4906 | case LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION: |
4907 | { | |
4908 | const enum lttng_action_status action_status = | |
28ab034a | 4909 | lttng_action_add_error_query_results(query_target_action, results); |
588c4b0d JG |
4910 | |
4911 | switch (action_status) { | |
4912 | case LTTNG_ACTION_STATUS_OK: | |
4913 | break; | |
4914 | default: | |
4915 | ret_code = LTTNG_ERR_UNK; | |
4916 | goto end; | |
4917 | } | |
4918 | ||
4919 | break; | |
4920 | } | |
4921 | default: | |
ef4cf1d2 | 4922 | abort(); |
588c4b0d JG |
4923 | break; |
4924 | } | |
4925 | ||
4926 | *_results = results; | |
cd9adb8b | 4927 | results = nullptr; |
588c4b0d JG |
4928 | ret_code = LTTNG_OK; |
4929 | end: | |
4930 | lttng_trigger_put(matching_trigger); | |
4931 | lttng_error_query_results_destroy(results); | |
4932 | return ret_code; | |
4933 | } | |
4934 | ||
6dc3064a DG |
4935 | /* |
4936 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
4937 | * snapshot output is *not* set with a remote destination. | |
4938 | * | |
9a654598 | 4939 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4940 | */ |
28ab034a JG |
4941 | static enum lttng_error_code set_relayd_for_snapshot(struct consumer_output *output, |
4942 | const struct ltt_session *session) | |
6dc3064a | 4943 | { |
9a654598 | 4944 | enum lttng_error_code status = LTTNG_OK; |
6dc3064a DG |
4945 | struct lttng_ht_iter iter; |
4946 | struct consumer_socket *socket; | |
1e791a74 | 4947 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
6fa5fe7c | 4948 | const char *base_path; |
6dc3064a | 4949 | |
a0377dfe FD |
4950 | LTTNG_ASSERT(output); |
4951 | LTTNG_ASSERT(session); | |
6dc3064a DG |
4952 | |
4953 | DBG2("Set relayd object from snapshot output"); | |
4954 | ||
1e791a74 | 4955 | if (session->current_trace_chunk) { |
28ab034a JG |
4956 | enum lttng_trace_chunk_status chunk_status = lttng_trace_chunk_get_id( |
4957 | session->current_trace_chunk, ¤t_chunk_id.value); | |
1e791a74 | 4958 | |
348a81dc | 4959 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) { |
1e791a74 JG |
4960 | current_chunk_id.is_set = true; |
4961 | } else { | |
4962 | ERR("Failed to get current trace chunk id"); | |
4963 | status = LTTNG_ERR_UNK; | |
4964 | goto error; | |
4965 | } | |
4966 | } | |
4967 | ||
6dc3064a | 4968 | /* Ignore if snapshot consumer output is not network. */ |
348a81dc | 4969 | if (output->type != CONSUMER_DST_NET) { |
6dc3064a DG |
4970 | goto error; |
4971 | } | |
4972 | ||
6fa5fe7c MD |
4973 | /* |
4974 | * The snapshot record URI base path overrides the session | |
4975 | * base path. | |
4976 | */ | |
4977 | if (output->dst.net.control.subdir[0] != '\0') { | |
4978 | base_path = output->dst.net.control.subdir; | |
4979 | } else { | |
4980 | base_path = session->base_path; | |
4981 | } | |
4982 | ||
6dc3064a DG |
4983 | /* |
4984 | * For each consumer socket, create and send the relayd object of the | |
4985 | * snapshot output. | |
4986 | */ | |
56047f5a JG |
4987 | { |
4988 | lttng::urcu::read_lock_guard read_lock; | |
4989 | ||
4990 | cds_lfht_for_each_entry (output->socks->ht, &iter.iter, socket, node.node) { | |
4991 | pthread_mutex_lock(socket->lock); | |
4992 | status = send_consumer_relayd_sockets( | |
4993 | session->id, | |
4994 | output, | |
4995 | socket, | |
4996 | session->name, | |
4997 | session->hostname, | |
4998 | base_path, | |
4999 | session->live_timer, | |
5000 | current_chunk_id.is_set ? ¤t_chunk_id.value : nullptr, | |
5001 | session->creation_time, | |
5002 | session->name_contains_creation_time); | |
5003 | pthread_mutex_unlock(socket->lock); | |
5004 | if (status != LTTNG_OK) { | |
5005 | goto error; | |
5006 | } | |
6dc3064a DG |
5007 | } |
5008 | } | |
6dc3064a DG |
5009 | |
5010 | error: | |
9a654598 | 5011 | return status; |
6dc3064a DG |
5012 | } |
5013 | ||
5014 | /* | |
5015 | * Record a kernel snapshot. | |
5016 | * | |
fac41e72 | 5017 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 5018 | */ |
28ab034a JG |
5019 | static enum lttng_error_code record_kernel_snapshot(struct ltt_kernel_session *ksess, |
5020 | const struct consumer_output *output, | |
5021 | const struct ltt_session *session, | |
5022 | uint64_t nb_packets_per_stream) | |
6dc3064a | 5023 | { |
9a654598 | 5024 | enum lttng_error_code status; |
6dc3064a | 5025 | |
a0377dfe FD |
5026 | LTTNG_ASSERT(ksess); |
5027 | LTTNG_ASSERT(output); | |
5028 | LTTNG_ASSERT(session); | |
6dc3064a | 5029 | |
28ab034a | 5030 | status = kernel_snapshot_record(ksess, output, nb_packets_per_stream); |
9a654598 | 5031 | return status; |
6dc3064a DG |
5032 | } |
5033 | ||
5034 | /* | |
5035 | * Record a UST snapshot. | |
5036 | * | |
9a654598 | 5037 | * Returns LTTNG_OK on success or a LTTNG_ERR error code. |
6dc3064a | 5038 | */ |
9a654598 | 5039 | static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess, |
28ab034a JG |
5040 | const struct consumer_output *output, |
5041 | const struct ltt_session *session, | |
5042 | uint64_t nb_packets_per_stream) | |
6dc3064a | 5043 | { |
9a654598 | 5044 | enum lttng_error_code status; |
6dc3064a | 5045 | |
a0377dfe FD |
5046 | LTTNG_ASSERT(usess); |
5047 | LTTNG_ASSERT(output); | |
5048 | LTTNG_ASSERT(session); | |
6dc3064a | 5049 | |
28ab034a | 5050 | status = ust_app_snapshot_record(usess, output, nb_packets_per_stream); |
9a654598 | 5051 | return status; |
6dc3064a DG |
5052 | } |
5053 | ||
28ab034a JG |
5054 | static uint64_t get_session_size_one_more_packet_per_stream(const struct ltt_session *session, |
5055 | uint64_t cur_nr_packets) | |
68808f4e | 5056 | { |
d07ceecd | 5057 | uint64_t tot_size = 0; |
68808f4e DG |
5058 | |
5059 | if (session->kernel_session) { | |
5060 | struct ltt_kernel_channel *chan; | |
28ab034a | 5061 | const struct ltt_kernel_session *ksess = session->kernel_session; |
68808f4e | 5062 | |
28ab034a | 5063 | cds_list_for_each_entry (chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
5064 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
5065 | /* | |
5066 | * Don't take channel into account if we | |
5067 | * already grab all its packets. | |
5068 | */ | |
5069 | continue; | |
68808f4e | 5070 | } |
28ab034a | 5071 | tot_size += chan->channel->attr.subbuf_size * chan->stream_count; |
68808f4e DG |
5072 | } |
5073 | } | |
5074 | ||
5075 | if (session->ust_session) { | |
fb9a95c4 | 5076 | const struct ltt_ust_session *usess = session->ust_session; |
68808f4e | 5077 | |
28ab034a | 5078 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, cur_nr_packets); |
68808f4e DG |
5079 | } |
5080 | ||
d07ceecd | 5081 | return tot_size; |
68808f4e DG |
5082 | } |
5083 | ||
5c786ded | 5084 | /* |
d07ceecd MD |
5085 | * Calculate the number of packets we can grab from each stream that |
5086 | * fits within the overall snapshot max size. | |
5087 | * | |
5088 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
5089 | * the number of packets per stream. | |
5090 | * | |
5091 | * TODO: this approach is not perfect: we consider the worse case | |
5092 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
5093 | * better if we do this calculation while we actually grab the packet | |
5094 | * content: we would know how much padding we don't actually store into | |
5095 | * the file. | |
5096 | * | |
5097 | * This algorithm is currently bounded by the number of packets per | |
5098 | * stream. | |
5099 | * | |
5100 | * Since we call this algorithm before actually grabbing the data, it's | |
5101 | * an approximation: for instance, applications could appear/disappear | |
5102 | * in between this call and actually grabbing data. | |
5c786ded | 5103 | */ |
28ab034a JG |
5104 | static int64_t get_session_nb_packets_per_stream(const struct ltt_session *session, |
5105 | uint64_t max_size) | |
5c786ded | 5106 | { |
d07ceecd MD |
5107 | int64_t size_left; |
5108 | uint64_t cur_nb_packets = 0; | |
5c786ded | 5109 | |
d07ceecd | 5110 | if (!max_size) { |
28ab034a | 5111 | return 0; /* Infinite */ |
5c786ded JD |
5112 | } |
5113 | ||
d07ceecd MD |
5114 | size_left = max_size; |
5115 | for (;;) { | |
5116 | uint64_t one_more_packet_tot_size; | |
5c786ded | 5117 | |
28ab034a JG |
5118 | one_more_packet_tot_size = |
5119 | get_session_size_one_more_packet_per_stream(session, cur_nb_packets); | |
d07ceecd MD |
5120 | if (!one_more_packet_tot_size) { |
5121 | /* We are already grabbing all packets. */ | |
5122 | break; | |
5123 | } | |
5124 | size_left -= one_more_packet_tot_size; | |
5125 | if (size_left < 0) { | |
5126 | break; | |
5127 | } | |
5128 | cur_nb_packets++; | |
5c786ded | 5129 | } |
aecf2da5 | 5130 | if (!cur_nb_packets && size_left != max_size) { |
d07ceecd MD |
5131 | /* Not enough room to grab one packet of each stream, error. */ |
5132 | return -1; | |
5133 | } | |
5134 | return cur_nb_packets; | |
5c786ded JD |
5135 | } |
5136 | ||
28ab034a JG |
5137 | static enum lttng_error_code snapshot_record(struct ltt_session *session, |
5138 | const struct snapshot_output *snapshot_output) | |
fb9a95c4 JG |
5139 | { |
5140 | int64_t nb_packets_per_stream; | |
d2956687 | 5141 | char snapshot_chunk_name[LTTNG_NAME_MAX]; |
348a81dc JG |
5142 | int ret; |
5143 | enum lttng_error_code ret_code = LTTNG_OK; | |
d2956687 | 5144 | struct lttng_trace_chunk *snapshot_trace_chunk; |
cd9adb8b JG |
5145 | struct consumer_output *original_ust_consumer_output = nullptr; |
5146 | struct consumer_output *original_kernel_consumer_output = nullptr; | |
5147 | struct consumer_output *snapshot_ust_consumer_output = nullptr; | |
5148 | struct consumer_output *snapshot_kernel_consumer_output = nullptr; | |
d2956687 | 5149 | |
28ab034a JG |
5150 | ret = snprintf(snapshot_chunk_name, |
5151 | sizeof(snapshot_chunk_name), | |
5152 | "%s-%s-%" PRIu64, | |
5153 | snapshot_output->name, | |
5154 | snapshot_output->datetime, | |
5155 | snapshot_output->nb_snapshot); | |
348a81dc | 5156 | if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) { |
d2956687 | 5157 | ERR("Failed to format snapshot name"); |
348a81dc JG |
5158 | ret_code = LTTNG_ERR_INVALID; |
5159 | goto error; | |
d2956687 JG |
5160 | } |
5161 | DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"", | |
28ab034a JG |
5162 | snapshot_output->name, |
5163 | session->name, | |
5164 | snapshot_chunk_name); | |
348a81dc JG |
5165 | if (!session->kernel_session && !session->ust_session) { |
5166 | ERR("Failed to record snapshot as no channels exist"); | |
5167 | ret_code = LTTNG_ERR_NO_CHANNEL; | |
5168 | goto error; | |
5169 | } | |
5170 | ||
5171 | if (session->kernel_session) { | |
28ab034a JG |
5172 | original_kernel_consumer_output = session->kernel_session->consumer; |
5173 | snapshot_kernel_consumer_output = consumer_copy_output(snapshot_output->consumer); | |
5174 | strcpy(snapshot_kernel_consumer_output->chunk_path, snapshot_chunk_name); | |
bd666153 JR |
5175 | |
5176 | /* Copy the original domain subdir. */ | |
5177 | strcpy(snapshot_kernel_consumer_output->domain_subdir, | |
28ab034a | 5178 | original_kernel_consumer_output->domain_subdir); |
bd666153 | 5179 | |
348a81dc | 5180 | ret = consumer_copy_sockets(snapshot_kernel_consumer_output, |
28ab034a | 5181 | original_kernel_consumer_output); |
348a81dc JG |
5182 | if (ret < 0) { |
5183 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
5184 | ret_code = LTTNG_ERR_NOMEM; | |
5185 | goto error; | |
5186 | } | |
28ab034a | 5187 | ret_code = set_relayd_for_snapshot(snapshot_kernel_consumer_output, session); |
348a81dc JG |
5188 | if (ret_code != LTTNG_OK) { |
5189 | ERR("Failed to setup relay daemon for kernel tracer snapshot"); | |
5190 | goto error; | |
5191 | } | |
28ab034a | 5192 | session->kernel_session->consumer = snapshot_kernel_consumer_output; |
348a81dc JG |
5193 | } |
5194 | if (session->ust_session) { | |
5195 | original_ust_consumer_output = session->ust_session->consumer; | |
28ab034a JG |
5196 | snapshot_ust_consumer_output = consumer_copy_output(snapshot_output->consumer); |
5197 | strcpy(snapshot_ust_consumer_output->chunk_path, snapshot_chunk_name); | |
bd666153 JR |
5198 | |
5199 | /* Copy the original domain subdir. */ | |
5200 | strcpy(snapshot_ust_consumer_output->domain_subdir, | |
28ab034a | 5201 | original_ust_consumer_output->domain_subdir); |
bd666153 | 5202 | |
348a81dc | 5203 | ret = consumer_copy_sockets(snapshot_ust_consumer_output, |
28ab034a | 5204 | original_ust_consumer_output); |
348a81dc JG |
5205 | if (ret < 0) { |
5206 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
5207 | ret_code = LTTNG_ERR_NOMEM; | |
5208 | goto error; | |
5209 | } | |
28ab034a | 5210 | ret_code = set_relayd_for_snapshot(snapshot_ust_consumer_output, session); |
348a81dc JG |
5211 | if (ret_code != LTTNG_OK) { |
5212 | ERR("Failed to setup relay daemon for userspace tracer snapshot"); | |
5213 | goto error; | |
5214 | } | |
28ab034a | 5215 | session->ust_session->consumer = snapshot_ust_consumer_output; |
348a81dc JG |
5216 | } |
5217 | ||
28ab034a JG |
5218 | snapshot_trace_chunk = session_create_new_trace_chunk( |
5219 | session, | |
5220 | snapshot_kernel_consumer_output ?: snapshot_ust_consumer_output, | |
5221 | consumer_output_get_base_path(snapshot_output->consumer), | |
5222 | snapshot_chunk_name); | |
d2956687 | 5223 | if (!snapshot_trace_chunk) { |
348a81dc | 5224 | ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"", |
28ab034a | 5225 | session->name); |
348a81dc JG |
5226 | ret_code = LTTNG_ERR_CREATE_DIR_FAIL; |
5227 | goto error; | |
d2956687 | 5228 | } |
a0377dfe | 5229 | LTTNG_ASSERT(!session->current_trace_chunk); |
cd9adb8b | 5230 | ret = session_set_trace_chunk(session, snapshot_trace_chunk, nullptr); |
d2956687 | 5231 | lttng_trace_chunk_put(snapshot_trace_chunk); |
cd9adb8b | 5232 | snapshot_trace_chunk = nullptr; |
d2956687 | 5233 | if (ret) { |
348a81dc | 5234 | ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"", |
28ab034a | 5235 | session->name); |
348a81dc JG |
5236 | ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; |
5237 | goto error; | |
d2956687 | 5238 | } |
fb9a95c4 | 5239 | |
28ab034a JG |
5240 | nb_packets_per_stream = |
5241 | get_session_nb_packets_per_stream(session, snapshot_output->max_size); | |
fb9a95c4 | 5242 | if (nb_packets_per_stream < 0) { |
348a81dc | 5243 | ret_code = LTTNG_ERR_MAX_SIZE_INVALID; |
5151d412 | 5244 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5245 | } |
5246 | ||
5247 | if (session->kernel_session) { | |
348a81dc | 5248 | ret_code = record_kernel_snapshot(session->kernel_session, |
28ab034a JG |
5249 | snapshot_kernel_consumer_output, |
5250 | session, | |
5251 | nb_packets_per_stream); | |
348a81dc | 5252 | if (ret_code != LTTNG_OK) { |
5151d412 | 5253 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5254 | } |
5255 | } | |
5256 | ||
5257 | if (session->ust_session) { | |
348a81dc | 5258 | ret_code = record_ust_snapshot(session->ust_session, |
28ab034a JG |
5259 | snapshot_ust_consumer_output, |
5260 | session, | |
5261 | nb_packets_per_stream); | |
348a81dc | 5262 | if (ret_code != LTTNG_OK) { |
5151d412 | 5263 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5264 | } |
5265 | } | |
d2956687 | 5266 | |
5151d412 | 5267 | error_close_trace_chunk: |
cd9adb8b | 5268 | if (session_set_trace_chunk(session, nullptr, &snapshot_trace_chunk)) { |
28ab034a | 5269 | ERR("Failed to release the current trace chunk of session \"%s\"", session->name); |
dbfee52c MD |
5270 | ret_code = LTTNG_ERR_UNK; |
5271 | } | |
5272 | ||
28ab034a JG |
5273 | if (session_close_trace_chunk(session, |
5274 | snapshot_trace_chunk, | |
5275 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, | |
cd9adb8b | 5276 | nullptr)) { |
d2956687 JG |
5277 | /* |
5278 | * Don't goto end; make sure the chunk is closed for the session | |
5279 | * to allow future snapshots. | |
5280 | */ | |
28ab034a | 5281 | ERR("Failed to close snapshot trace chunk of session \"%s\"", session->name); |
348a81dc | 5282 | ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; |
d2956687 | 5283 | } |
a49a9216 JG |
5284 | |
5285 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
cd9adb8b | 5286 | snapshot_trace_chunk = nullptr; |
348a81dc JG |
5287 | error: |
5288 | if (original_ust_consumer_output) { | |
5289 | session->ust_session->consumer = original_ust_consumer_output; | |
5290 | } | |
5291 | if (original_kernel_consumer_output) { | |
28ab034a | 5292 | session->kernel_session->consumer = original_kernel_consumer_output; |
348a81dc JG |
5293 | } |
5294 | consumer_output_put(snapshot_ust_consumer_output); | |
5295 | consumer_output_put(snapshot_kernel_consumer_output); | |
5296 | return ret_code; | |
fb9a95c4 JG |
5297 | } |
5298 | ||
6dc3064a DG |
5299 | /* |
5300 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
5301 | * | |
5302 | * The wait parameter is ignored so this call always wait for the snapshot to | |
5303 | * complete before returning. | |
5304 | * | |
5305 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
5306 | */ | |
5307 | int cmd_snapshot_record(struct ltt_session *session, | |
28ab034a JG |
5308 | const struct lttng_snapshot_output *output, |
5309 | int wait __attribute__((unused))) | |
6dc3064a | 5310 | { |
9a654598 JG |
5311 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5312 | int ret; | |
00e1dfc4 | 5313 | unsigned int snapshot_success = 0; |
10ba83fe | 5314 | char datetime[16]; |
cd9adb8b | 5315 | struct snapshot_output *tmp_output = nullptr; |
6dc3064a | 5316 | |
a0377dfe FD |
5317 | LTTNG_ASSERT(session); |
5318 | LTTNG_ASSERT(output); | |
6dc3064a DG |
5319 | |
5320 | DBG("Cmd snapshot record for session %s", session->name); | |
5321 | ||
10ba83fe | 5322 | /* Get the datetime for the snapshot output directory. */ |
28ab034a | 5323 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, sizeof(datetime)); |
10ba83fe | 5324 | if (!ret) { |
9a654598 | 5325 | cmd_ret = LTTNG_ERR_INVALID; |
10ba83fe JR |
5326 | goto error; |
5327 | } | |
5328 | ||
6dc3064a | 5329 | /* |
d3f14b8a MD |
5330 | * Permission denied to create an output if the session is not |
5331 | * set in no output mode. | |
6dc3064a DG |
5332 | */ |
5333 | if (session->output_traces) { | |
9a654598 | 5334 | cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
5335 | goto error; |
5336 | } | |
5337 | ||
5338 | /* The session needs to be started at least once. */ | |
8382cf6f | 5339 | if (!session->has_been_started) { |
9a654598 | 5340 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
6dc3064a DG |
5341 | goto error; |
5342 | } | |
5343 | ||
5344 | /* Use temporary output for the session. */ | |
ba45d9f0 | 5345 | if (*output->ctrl_url != '\0') { |
2abe7969 JG |
5346 | tmp_output = snapshot_output_alloc(); |
5347 | if (!tmp_output) { | |
5348 | cmd_ret = LTTNG_ERR_NOMEM; | |
5349 | goto error; | |
5350 | } | |
5351 | ||
28ab034a JG |
5352 | ret = snapshot_output_init(session, |
5353 | output->max_size, | |
5354 | output->name, | |
5355 | output->ctrl_url, | |
5356 | output->data_url, | |
5357 | session->consumer, | |
5358 | tmp_output, | |
cd9adb8b | 5359 | nullptr); |
6dc3064a DG |
5360 | if (ret < 0) { |
5361 | if (ret == -ENOMEM) { | |
9a654598 | 5362 | cmd_ret = LTTNG_ERR_NOMEM; |
6dc3064a | 5363 | } else { |
9a654598 | 5364 | cmd_ret = LTTNG_ERR_INVALID; |
6dc3064a DG |
5365 | } |
5366 | goto error; | |
5367 | } | |
1bfe7328 | 5368 | /* Use the global session count for the temporary snapshot. */ |
2abe7969 | 5369 | tmp_output->nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe JR |
5370 | |
5371 | /* Use the global datetime */ | |
2abe7969 | 5372 | memcpy(tmp_output->datetime, datetime, sizeof(datetime)); |
f46376a1 | 5373 | cmd_ret = snapshot_record(session, tmp_output); |
fb9a95c4 | 5374 | if (cmd_ret != LTTNG_OK) { |
804c90a8 JR |
5375 | goto error; |
5376 | } | |
804c90a8 JR |
5377 | snapshot_success = 1; |
5378 | } else { | |
5379 | struct snapshot_output *sout; | |
5380 | struct lttng_ht_iter iter; | |
68808f4e | 5381 | |
56047f5a JG |
5382 | lttng::urcu::read_lock_guard read_lock; |
5383 | ||
28ab034a JG |
5384 | cds_lfht_for_each_entry ( |
5385 | session->snapshot.output_ht->ht, &iter.iter, sout, node.node) { | |
2abe7969 JG |
5386 | struct snapshot_output output_copy; |
5387 | ||
804c90a8 | 5388 | /* |
2abe7969 JG |
5389 | * Make a local copy of the output and override output |
5390 | * parameters with those provided as part of the | |
5391 | * command. | |
804c90a8 | 5392 | */ |
2abe7969 | 5393 | memcpy(&output_copy, sout, sizeof(output_copy)); |
1bfe7328 | 5394 | |
804c90a8 | 5395 | if (output->max_size != (uint64_t) -1ULL) { |
2abe7969 | 5396 | output_copy.max_size = output->max_size; |
6dc3064a | 5397 | } |
d07ceecd | 5398 | |
2abe7969 | 5399 | output_copy.nb_snapshot = session->snapshot.nb_snapshot; |
28ab034a | 5400 | memcpy(output_copy.datetime, datetime, sizeof(datetime)); |
6dc3064a | 5401 | |
804c90a8 JR |
5402 | /* Use temporary name. */ |
5403 | if (*output->name != '\0') { | |
2abe7969 | 5404 | if (lttng_strncpy(output_copy.name, |
28ab034a JG |
5405 | output->name, |
5406 | sizeof(output_copy.name))) { | |
9a654598 | 5407 | cmd_ret = LTTNG_ERR_INVALID; |
cf3e357d MD |
5408 | goto error; |
5409 | } | |
804c90a8 | 5410 | } |
e1986656 | 5411 | |
f46376a1 | 5412 | cmd_ret = snapshot_record(session, &output_copy); |
fb9a95c4 | 5413 | if (cmd_ret != LTTNG_OK) { |
fb9a95c4 | 5414 | goto error; |
6dc3064a | 5415 | } |
56047f5a | 5416 | |
804c90a8 | 5417 | snapshot_success = 1; |
6dc3064a DG |
5418 | } |
5419 | } | |
5420 | ||
1bfe7328 DG |
5421 | if (snapshot_success) { |
5422 | session->snapshot.nb_snapshot++; | |
b67578cb | 5423 | } else { |
9a654598 | 5424 | cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL; |
1bfe7328 DG |
5425 | } |
5426 | ||
6dc3064a | 5427 | error: |
2abe7969 JG |
5428 | if (tmp_output) { |
5429 | snapshot_output_destroy(tmp_output); | |
5430 | } | |
56047f5a | 5431 | |
9a654598 | 5432 | return cmd_ret; |
6dc3064a DG |
5433 | } |
5434 | ||
d7ba1388 MD |
5435 | /* |
5436 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
5437 | */ | |
28ab034a | 5438 | int cmd_set_session_shm_path(struct ltt_session *session, const char *shm_path) |
d7ba1388 MD |
5439 | { |
5440 | /* Safety net */ | |
a0377dfe | 5441 | LTTNG_ASSERT(session); |
d7ba1388 MD |
5442 | |
5443 | /* | |
5444 | * Can only set shm path before session is started. | |
5445 | */ | |
5446 | if (session->has_been_started) { | |
5447 | return LTTNG_ERR_SESSION_STARTED; | |
5448 | } | |
5449 | ||
28ab034a | 5450 | strncpy(session->shm_path, shm_path, sizeof(session->shm_path)); |
d7ba1388 MD |
5451 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; |
5452 | ||
7e397c55 | 5453 | return LTTNG_OK; |
d7ba1388 MD |
5454 | } |
5455 | ||
5c408ad8 JD |
5456 | /* |
5457 | * Command LTTNG_ROTATE_SESSION from the lttng-ctl library. | |
5458 | * | |
5459 | * Ask the consumer to rotate the session output directory. | |
5460 | * The session lock must be held. | |
5461 | * | |
d5a1b7aa | 5462 | * Returns LTTNG_OK on success or else a negative LTTng error code. |
5c408ad8 JD |
5463 | */ |
5464 | int cmd_rotate_session(struct ltt_session *session, | |
28ab034a JG |
5465 | struct lttng_rotate_session_return *rotate_return, |
5466 | bool quiet_rotation, | |
5467 | enum lttng_trace_chunk_command_type command) | |
5c408ad8 JD |
5468 | { |
5469 | int ret; | |
d2956687 | 5470 | uint64_t ongoing_rotation_chunk_id; |
d5a1b7aa | 5471 | enum lttng_error_code cmd_ret = LTTNG_OK; |
cd9adb8b JG |
5472 | struct lttng_trace_chunk *chunk_being_archived = nullptr; |
5473 | struct lttng_trace_chunk *new_trace_chunk = nullptr; | |
d2956687 | 5474 | enum lttng_trace_chunk_status chunk_status; |
3156892b JG |
5475 | bool failed_to_rotate = false; |
5476 | enum lttng_error_code rotation_fail_code = LTTNG_OK; | |
5c408ad8 | 5477 | |
a0377dfe | 5478 | LTTNG_ASSERT(session); |
5c408ad8 JD |
5479 | |
5480 | if (!session->has_been_started) { | |
d5a1b7aa | 5481 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
d68c9a04 | 5482 | goto end; |
5c408ad8 JD |
5483 | } |
5484 | ||
d48d65e1 MD |
5485 | /* |
5486 | * Explicit rotation is not supported for live sessions. | |
5487 | * However, live sessions can perform a quiet rotation on | |
5488 | * destroy. | |
5489 | * Rotation is not supported for snapshot traces (no output). | |
5490 | */ | |
28ab034a | 5491 | if ((!quiet_rotation && session->live_timer) || !session->output_traces) { |
d5a1b7aa | 5492 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
d68c9a04 | 5493 | goto end; |
5c408ad8 JD |
5494 | } |
5495 | ||
d2956687 | 5496 | /* Unsupported feature in lttng-relayd before 2.11. */ |
070b6a86 | 5497 | if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET && |
28ab034a JG |
5498 | (session->consumer->relay_major_version == 2 && |
5499 | session->consumer->relay_minor_version < 11)) { | |
d5a1b7aa | 5500 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY; |
d68c9a04 | 5501 | goto end; |
5c408ad8 JD |
5502 | } |
5503 | ||
a40a503f MD |
5504 | /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */ |
5505 | if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) { | |
5506 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL; | |
5507 | goto end; | |
5508 | } | |
5509 | ||
92816cc3 | 5510 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
92816cc3 | 5511 | DBG("Refusing to launch a rotation; a rotation is already in progress for session %s", |
28ab034a | 5512 | session->name); |
d5a1b7aa | 5513 | cmd_ret = LTTNG_ERR_ROTATION_PENDING; |
d68c9a04 | 5514 | goto end; |
5c408ad8 JD |
5515 | } |
5516 | ||
5517 | /* | |
5518 | * After a stop, we only allow one rotation to occur, the other ones are | |
5519 | * useless until a new start. | |
5520 | */ | |
5521 | if (session->rotated_after_last_stop) { | |
5522 | DBG("Session \"%s\" was already rotated after stop, refusing rotation", | |
28ab034a | 5523 | session->name); |
d5a1b7aa | 5524 | cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; |
d68c9a04 | 5525 | goto end; |
5c408ad8 | 5526 | } |
b02f5986 MD |
5527 | |
5528 | /* | |
5529 | * After a stop followed by a clear, disallow following rotations a they would | |
5530 | * generate empty chunks. | |
5531 | */ | |
5532 | if (session->cleared_after_last_stop) { | |
5533 | DBG("Session \"%s\" was already cleared after stop, refusing rotation", | |
28ab034a | 5534 | session->name); |
b02f5986 MD |
5535 | cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR; |
5536 | goto end; | |
5537 | } | |
5538 | ||
d2956687 | 5539 | if (session->active) { |
cd9adb8b JG |
5540 | new_trace_chunk = |
5541 | session_create_new_trace_chunk(session, nullptr, nullptr, nullptr); | |
d2956687 JG |
5542 | if (!new_trace_chunk) { |
5543 | cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
5544 | goto error; | |
5c408ad8 | 5545 | } |
0e270a1e | 5546 | } |
2961f09e | 5547 | |
3156892b JG |
5548 | /* |
5549 | * The current trace chunk becomes the chunk being archived. | |
5550 | * | |
5551 | * After this point, "chunk_being_archived" must absolutely | |
5552 | * be closed on the consumer(s), otherwise it will never be | |
5553 | * cleaned-up, which will result in a leak. | |
5554 | */ | |
28ab034a | 5555 | ret = session_set_trace_chunk(session, new_trace_chunk, &chunk_being_archived); |
d2956687 JG |
5556 | if (ret) { |
5557 | cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
b178f53e JG |
5558 | goto error; |
5559 | } | |
5560 | ||
5c408ad8 | 5561 | if (session->kernel_session) { |
d5a1b7aa JG |
5562 | cmd_ret = kernel_rotate_session(session); |
5563 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5564 | failed_to_rotate = true; |
5565 | rotation_fail_code = cmd_ret; | |
5c408ad8 JD |
5566 | } |
5567 | } | |
5568 | if (session->ust_session) { | |
d5a1b7aa JG |
5569 | cmd_ret = ust_app_rotate_session(session); |
5570 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5571 | failed_to_rotate = true; |
5572 | rotation_fail_code = cmd_ret; | |
5c408ad8 | 5573 | } |
92816cc3 | 5574 | } |
17dd1232 | 5575 | |
3b61d9ee JG |
5576 | if (!session->active) { |
5577 | session->rotated_after_last_stop = true; | |
5578 | } | |
5579 | ||
5580 | if (!chunk_being_archived) { | |
5581 | DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check", | |
28ab034a | 5582 | session->name); |
3b61d9ee JG |
5583 | if (failed_to_rotate) { |
5584 | cmd_ret = rotation_fail_code; | |
5585 | goto error; | |
5586 | } | |
5587 | cmd_ret = LTTNG_OK; | |
5588 | goto end; | |
5589 | } | |
5590 | ||
5591 | session->rotation_state = LTTNG_ROTATION_STATE_ONGOING; | |
28ab034a | 5592 | chunk_status = lttng_trace_chunk_get_id(chunk_being_archived, &ongoing_rotation_chunk_id); |
a0377dfe | 5593 | LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); |
3b61d9ee | 5594 | |
28ab034a JG |
5595 | ret = session_close_trace_chunk( |
5596 | session, chunk_being_archived, command, session->last_chunk_path); | |
d2956687 JG |
5597 | if (ret) { |
5598 | cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; | |
5599 | goto error; | |
5600 | } | |
5601 | ||
3156892b JG |
5602 | if (failed_to_rotate) { |
5603 | cmd_ret = rotation_fail_code; | |
5604 | goto error; | |
5605 | } | |
5606 | ||
7fdbed1c | 5607 | session->quiet_rotation = quiet_rotation; |
28ab034a | 5608 | ret = timer_session_rotation_pending_check_start(session, DEFAULT_ROTATE_PENDING_TIMER); |
92816cc3 | 5609 | if (ret) { |
d5a1b7aa | 5610 | cmd_ret = LTTNG_ERR_UNK; |
2961f09e | 5611 | goto error; |
5c408ad8 JD |
5612 | } |
5613 | ||
5c408ad8 | 5614 | if (rotate_return) { |
d2956687 | 5615 | rotate_return->rotation_id = ongoing_rotation_chunk_id; |
5c408ad8 JD |
5616 | } |
5617 | ||
d2956687 | 5618 | session->chunk_being_archived = chunk_being_archived; |
cd9adb8b | 5619 | chunk_being_archived = nullptr; |
7fdbed1c JG |
5620 | if (!quiet_rotation) { |
5621 | ret = notification_thread_command_session_rotation_ongoing( | |
28ab034a | 5622 | the_notification_thread_handle, session->id, ongoing_rotation_chunk_id); |
7fdbed1c JG |
5623 | if (ret != LTTNG_OK) { |
5624 | ERR("Failed to notify notification thread that a session rotation is ongoing for session %s", | |
28ab034a | 5625 | session->name); |
7966af57 | 5626 | cmd_ret = (lttng_error_code) ret; |
7fdbed1c | 5627 | } |
2961f09e JG |
5628 | } |
5629 | ||
92816cc3 | 5630 | DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent", |
28ab034a JG |
5631 | session->name, |
5632 | ongoing_rotation_chunk_id); | |
5c408ad8 | 5633 | end: |
d2956687 JG |
5634 | lttng_trace_chunk_put(new_trace_chunk); |
5635 | lttng_trace_chunk_put(chunk_being_archived); | |
d5a1b7aa | 5636 | ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret); |
5c408ad8 | 5637 | return ret; |
2961f09e | 5638 | error: |
0038180d | 5639 | if (session_reset_rotation_state(*session, LTTNG_ROTATION_STATE_ERROR)) { |
28ab034a | 5640 | ERR("Failed to reset rotation state of session \"%s\"", session->name); |
2961f09e JG |
5641 | } |
5642 | goto end; | |
5c408ad8 JD |
5643 | } |
5644 | ||
5645 | /* | |
d68c9a04 | 5646 | * Command LTTNG_ROTATION_GET_INFO from the lttng-ctl library. |
5c408ad8 JD |
5647 | * |
5648 | * Check if the session has finished its rotation. | |
5649 | * | |
d2956687 | 5650 | * Return LTTNG_OK on success or else an LTTNG_ERR code. |
5c408ad8 | 5651 | */ |
d68c9a04 | 5652 | int cmd_rotate_get_info(struct ltt_session *session, |
28ab034a JG |
5653 | struct lttng_rotation_get_info_return *info_return, |
5654 | uint64_t rotation_id) | |
5c408ad8 | 5655 | { |
d2956687 JG |
5656 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5657 | enum lttng_rotation_state rotation_state; | |
5c408ad8 | 5658 | |
28ab034a JG |
5659 | DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, |
5660 | session->name, | |
5661 | session->most_recent_chunk_id.value); | |
5c408ad8 | 5662 | |
d2956687 JG |
5663 | if (session->chunk_being_archived) { |
5664 | enum lttng_trace_chunk_status chunk_status; | |
5665 | uint64_t chunk_id; | |
5666 | ||
28ab034a | 5667 | chunk_status = lttng_trace_chunk_get_id(session->chunk_being_archived, &chunk_id); |
a0377dfe | 5668 | LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); |
d2956687 | 5669 | |
28ab034a JG |
5670 | rotation_state = rotation_id == chunk_id ? LTTNG_ROTATION_STATE_ONGOING : |
5671 | LTTNG_ROTATION_STATE_EXPIRED; | |
d2956687 JG |
5672 | } else { |
5673 | if (session->last_archived_chunk_id.is_set && | |
28ab034a | 5674 | rotation_id != session->last_archived_chunk_id.value) { |
d2956687 JG |
5675 | rotation_state = LTTNG_ROTATION_STATE_EXPIRED; |
5676 | } else { | |
5677 | rotation_state = session->rotation_state; | |
5678 | } | |
5c408ad8 JD |
5679 | } |
5680 | ||
d2956687 JG |
5681 | switch (rotation_state) { |
5682 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
83ed9e90 | 5683 | DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"", |
28ab034a | 5684 | session->name); |
d2956687 JG |
5685 | goto end; |
5686 | case LTTNG_ROTATION_STATE_EXPIRED: | |
28ab034a JG |
5687 | DBG("Reporting that the rotation state of rotation id %" PRIu64 |
5688 | " of session \"%s\" has expired", | |
5689 | rotation_id, | |
5690 | session->name); | |
d2956687 | 5691 | break; |
d68c9a04 | 5692 | case LTTNG_ROTATION_STATE_ONGOING: |
d2956687 | 5693 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending", |
28ab034a JG |
5694 | rotation_id, |
5695 | session->name); | |
d68c9a04 JD |
5696 | break; |
5697 | case LTTNG_ROTATION_STATE_COMPLETED: | |
dd73d57b | 5698 | { |
d2956687 JG |
5699 | int fmt_ret; |
5700 | char *chunk_path; | |
dd73d57b JG |
5701 | char *current_tracing_path_reply; |
5702 | size_t current_tracing_path_reply_len; | |
5703 | ||
d2956687 | 5704 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed", |
28ab034a JG |
5705 | rotation_id, |
5706 | session->name); | |
d2956687 | 5707 | |
dd73d57b JG |
5708 | switch (session_get_consumer_destination_type(session)) { |
5709 | case CONSUMER_DST_LOCAL: | |
28ab034a | 5710 | current_tracing_path_reply = info_return->location.local.absolute_path; |
dd73d57b | 5711 | current_tracing_path_reply_len = |
28ab034a | 5712 | sizeof(info_return->location.local.absolute_path); |
dd73d57b | 5713 | info_return->location_type = |
28ab034a | 5714 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL; |
ecd1a12f | 5715 | fmt_ret = asprintf(&chunk_path, |
28ab034a JG |
5716 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", |
5717 | session_get_base_path(session), | |
5718 | session->last_archived_chunk_name); | |
ecd1a12f MD |
5719 | if (fmt_ret == -1) { |
5720 | PERROR("Failed to format the path of the last archived trace chunk"); | |
5721 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5722 | cmd_ret = LTTNG_ERR_UNK; | |
5723 | goto end; | |
5724 | } | |
dd73d57b JG |
5725 | break; |
5726 | case CONSUMER_DST_NET: | |
09cfbe47 JG |
5727 | { |
5728 | uint16_t ctrl_port, data_port; | |
5729 | ||
28ab034a | 5730 | current_tracing_path_reply = info_return->location.relay.relative_path; |
dd73d57b | 5731 | current_tracing_path_reply_len = |
28ab034a | 5732 | sizeof(info_return->location.relay.relative_path); |
dd73d57b JG |
5733 | /* Currently the only supported relay protocol. */ |
5734 | info_return->location.relay.protocol = | |
28ab034a | 5735 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP; |
dd73d57b | 5736 | |
d2956687 | 5737 | fmt_ret = lttng_strncpy(info_return->location.relay.host, |
28ab034a JG |
5738 | session_get_net_consumer_hostname(session), |
5739 | sizeof(info_return->location.relay.host)); | |
d2956687 JG |
5740 | if (fmt_ret) { |
5741 | ERR("Failed to copy host name to rotate_get_info reply"); | |
dd73d57b | 5742 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5743 | cmd_ret = LTTNG_ERR_SET_URL; |
dd73d57b JG |
5744 | goto end; |
5745 | } | |
5746 | ||
09cfbe47 JG |
5747 | session_get_net_consumer_ports(session, &ctrl_port, &data_port); |
5748 | info_return->location.relay.ports.control = ctrl_port; | |
5749 | info_return->location.relay.ports.data = data_port; | |
dd73d57b | 5750 | info_return->location_type = |
28ab034a | 5751 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY; |
ecd1a12f MD |
5752 | chunk_path = strdup(session->last_chunk_path); |
5753 | if (!chunk_path) { | |
5754 | ERR("Failed to allocate the path of the last archived trace chunk"); | |
5755 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5756 | cmd_ret = LTTNG_ERR_UNK; | |
5757 | goto end; | |
5758 | } | |
dd73d57b | 5759 | break; |
09cfbe47 | 5760 | } |
dd73d57b JG |
5761 | default: |
5762 | abort(); | |
5763 | } | |
d2956687 | 5764 | |
28ab034a JG |
5765 | fmt_ret = lttng_strncpy( |
5766 | current_tracing_path_reply, chunk_path, current_tracing_path_reply_len); | |
d2956687 JG |
5767 | free(chunk_path); |
5768 | if (fmt_ret) { | |
5769 | ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply"); | |
d68c9a04 | 5770 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5771 | cmd_ret = LTTNG_ERR_UNK; |
5c408ad8 JD |
5772 | goto end; |
5773 | } | |
dd73d57b | 5774 | |
d68c9a04 | 5775 | break; |
dd73d57b | 5776 | } |
d68c9a04 | 5777 | case LTTNG_ROTATION_STATE_ERROR: |
28ab034a JG |
5778 | DBG("Reporting that an error occurred during rotation %" PRIu64 |
5779 | " of session \"%s\"", | |
5780 | rotation_id, | |
5781 | session->name); | |
d68c9a04 JD |
5782 | break; |
5783 | default: | |
5784 | abort(); | |
5c408ad8 JD |
5785 | } |
5786 | ||
d2956687 | 5787 | cmd_ret = LTTNG_OK; |
5c408ad8 | 5788 | end: |
d2956687 JG |
5789 | info_return->status = (int32_t) rotation_state; |
5790 | return cmd_ret; | |
5c408ad8 JD |
5791 | } |
5792 | ||
259c2674 JD |
5793 | /* |
5794 | * Command LTTNG_ROTATION_SET_SCHEDULE from the lttng-ctl library. | |
5795 | * | |
5796 | * Configure the automatic rotation parameters. | |
66ea93b1 JG |
5797 | * 'activate' to true means activate the rotation schedule type with 'new_value'. |
5798 | * 'activate' to false means deactivate the rotation schedule and validate that | |
5799 | * 'new_value' has the same value as the currently active value. | |
259c2674 | 5800 | * |
1136f41b | 5801 | * Return LTTNG_OK on success or else a positive LTTNG_ERR code. |
259c2674 JD |
5802 | */ |
5803 | int cmd_rotation_set_schedule(struct ltt_session *session, | |
28ab034a JG |
5804 | bool activate, |
5805 | enum lttng_rotation_schedule_type schedule_type, | |
0038180d | 5806 | uint64_t new_value) |
259c2674 JD |
5807 | { |
5808 | int ret; | |
66ea93b1 | 5809 | uint64_t *parameter_value; |
259c2674 | 5810 | |
a0377dfe | 5811 | LTTNG_ASSERT(session); |
259c2674 JD |
5812 | |
5813 | DBG("Cmd rotate set schedule session %s", session->name); | |
5814 | ||
92fe5ca1 | 5815 | if (session->live_timer || !session->output_traces) { |
66ea93b1 | 5816 | DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session"); |
259c2674 JD |
5817 | ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
5818 | goto end; | |
5819 | } | |
5820 | ||
66ea93b1 JG |
5821 | switch (schedule_type) { |
5822 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5823 | parameter_value = &session->rotate_size; | |
5824 | break; | |
5825 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5826 | parameter_value = &session->rotate_timer_period; | |
5827 | if (new_value >= UINT_MAX) { | |
28ab034a JG |
5828 | DBG("Failing ROTATION_SET_SCHEDULE command as the value requested for a periodic rotation schedule is invalid: %" PRIu64 |
5829 | " > %u (UINT_MAX)", | |
5830 | new_value, | |
5831 | UINT_MAX); | |
66ea93b1 JG |
5832 | ret = LTTNG_ERR_INVALID; |
5833 | goto end; | |
5834 | } | |
5835 | break; | |
5836 | default: | |
5837 | WARN("Failing ROTATION_SET_SCHEDULE command on unknown schedule type"); | |
5838 | ret = LTTNG_ERR_INVALID; | |
259c2674 | 5839 | goto end; |
66ea93b1 JG |
5840 | } |
5841 | ||
5842 | /* Improper use of the API. */ | |
5843 | if (new_value == -1ULL) { | |
5844 | WARN("Failing ROTATION_SET_SCHEDULE command as the value requested is -1"); | |
5845 | ret = LTTNG_ERR_INVALID; | |
259c2674 JD |
5846 | goto end; |
5847 | } | |
5848 | ||
66ea93b1 JG |
5849 | /* |
5850 | * As indicated in struct ltt_session's comments, a value of == 0 means | |
5851 | * this schedule rotation type is not in use. | |
5852 | * | |
5853 | * Reject the command if we were asked to activate a schedule that was | |
5854 | * already active. | |
5855 | */ | |
5856 | if (activate && *parameter_value != 0) { | |
5857 | DBG("Failing ROTATION_SET_SCHEDULE (activate) command as the schedule is already active"); | |
5858 | ret = LTTNG_ERR_ROTATION_SCHEDULE_SET; | |
90936dcf | 5859 | goto end; |
66ea93b1 JG |
5860 | } |
5861 | ||
5862 | /* | |
5863 | * Reject the command if we were asked to deactivate a schedule that was | |
5864 | * not active. | |
5865 | */ | |
5866 | if (!activate && *parameter_value == 0) { | |
5867 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as the schedule is already inactive"); | |
5868 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
90936dcf JD |
5869 | goto end; |
5870 | } | |
5871 | ||
66ea93b1 JG |
5872 | /* |
5873 | * Reject the command if we were asked to deactivate a schedule that | |
5874 | * doesn't exist. | |
5875 | */ | |
5876 | if (!activate && *parameter_value != new_value) { | |
5877 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as an inexistant schedule was provided"); | |
5878 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
5879 | goto end; | |
5880 | } | |
259c2674 | 5881 | |
66ea93b1 JG |
5882 | *parameter_value = activate ? new_value : 0; |
5883 | ||
5884 | switch (schedule_type) { | |
5885 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5886 | if (activate && session->active) { | |
5887 | /* | |
5888 | * Only start the timer if the session is active, | |
5889 | * otherwise it will be started when the session starts. | |
5890 | */ | |
28ab034a | 5891 | ret = timer_session_rotation_schedule_timer_start(session, new_value); |
259c2674 | 5892 | if (ret) { |
66ea93b1 | 5893 | ERR("Failed to enable session rotation timer in ROTATION_SET_SCHEDULE command"); |
259c2674 JD |
5894 | ret = LTTNG_ERR_UNK; |
5895 | goto end; | |
5896 | } | |
66ea93b1 | 5897 | } else { |
28ab034a | 5898 | ret = timer_session_rotation_schedule_timer_stop(session); |
66ea93b1 JG |
5899 | if (ret) { |
5900 | ERR("Failed to disable session rotation timer in ROTATION_SET_SCHEDULE command"); | |
5901 | ret = LTTNG_ERR_UNK; | |
f3ce6946 | 5902 | goto end; |
66ea93b1 | 5903 | } |
259c2674 | 5904 | } |
66ea93b1 JG |
5905 | break; |
5906 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5907 | if (activate) { | |
0038180d JG |
5908 | try { |
5909 | the_rotation_thread_handle->subscribe_session_consumed_size_rotation( | |
5910 | *session, new_value); | |
5b9eda8a | 5911 | } catch (const std::exception& e) { |
0038180d JG |
5912 | ERR("Failed to enable consumed-size notification in ROTATION_SET_SCHEDULE command: %s", |
5913 | e.what()); | |
90936dcf JD |
5914 | ret = LTTNG_ERR_UNK; |
5915 | goto end; | |
5916 | } | |
90936dcf | 5917 | } else { |
0038180d JG |
5918 | try { |
5919 | the_rotation_thread_handle | |
5920 | ->unsubscribe_session_consumed_size_rotation(*session); | |
5b9eda8a | 5921 | } catch (const std::exception& e) { |
0038180d JG |
5922 | ERR("Failed to disable consumed-size notification in ROTATION_SET_SCHEDULE command: %s", |
5923 | e.what()); | |
90936dcf JD |
5924 | ret = LTTNG_ERR_UNK; |
5925 | goto end; | |
5926 | } | |
90936dcf | 5927 | } |
66ea93b1 JG |
5928 | break; |
5929 | default: | |
5930 | /* Would have been caught before. */ | |
5931 | abort(); | |
90936dcf JD |
5932 | } |
5933 | ||
259c2674 JD |
5934 | ret = LTTNG_OK; |
5935 | ||
5936 | goto end; | |
5937 | ||
5938 | end: | |
5939 | return ret; | |
5940 | } | |
5941 | ||
a503e1ef JG |
5942 | /* Wait for a given path to be removed before continuing. */ |
5943 | static enum lttng_error_code wait_on_path(void *path_data) | |
5944 | { | |
7966af57 | 5945 | const char *shm_path = (const char *) path_data; |
a503e1ef JG |
5946 | |
5947 | DBG("Waiting for the shm path at %s to be removed before completing session destruction", | |
28ab034a | 5948 | shm_path); |
a503e1ef JG |
5949 | while (true) { |
5950 | int ret; | |
5951 | struct stat st; | |
5952 | ||
5953 | ret = stat(shm_path, &st); | |
5954 | if (ret) { | |
5955 | if (errno != ENOENT) { | |
5956 | PERROR("stat() returned an error while checking for the existence of the shm path"); | |
5957 | } else { | |
5958 | DBG("shm path no longer exists, completing the destruction of session"); | |
5959 | } | |
5960 | break; | |
5961 | } else { | |
5962 | if (!S_ISDIR(st.st_mode)) { | |
5963 | ERR("The type of shm path %s returned by stat() is not a directory; aborting the wait for shm path removal", | |
28ab034a | 5964 | shm_path); |
a503e1ef JG |
5965 | break; |
5966 | } | |
5967 | } | |
5968 | usleep(SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US); | |
5969 | } | |
5970 | return LTTNG_OK; | |
5971 | } | |
5972 | ||
5973 | /* | |
5974 | * Returns a pointer to a handler to run on completion of a command. | |
5975 | * Returns NULL if no handler has to be run for the last command executed. | |
5976 | */ | |
cd9adb8b | 5977 | const struct cmd_completion_handler *cmd_pop_completion_handler() |
a503e1ef JG |
5978 | { |
5979 | struct cmd_completion_handler *handler = current_completion_handler; | |
5980 | ||
cd9adb8b | 5981 | current_completion_handler = nullptr; |
a503e1ef JG |
5982 | return handler; |
5983 | } | |
5984 | ||
2f77fc4b DG |
5985 | /* |
5986 | * Init command subsystem. | |
5987 | */ | |
cd9adb8b | 5988 | void cmd_init() |
2f77fc4b DG |
5989 | { |
5990 | /* | |
d88aee68 DG |
5991 | * Set network sequence index to 1 for streams to match a relayd |
5992 | * socket on the consumer side. | |
2f77fc4b | 5993 | */ |
d88aee68 DG |
5994 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
5995 | relayd_net_seq_idx = 1; | |
5996 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
5997 | |
5998 | DBG("Command subsystem initialized"); | |
5999 | } |