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" | |
a0a4f314 | 15 | #include "consumer-output.hpp" |
28ab034a JG |
16 | #include "consumer.hpp" |
17 | #include "event-notifier-error-accounting.hpp" | |
18 | #include "event.hpp" | |
19 | #include "health-sessiond.hpp" | |
20 | #include "kernel-consumer.hpp" | |
21 | #include "kernel.hpp" | |
22 | #include "lttng-sessiond.hpp" | |
23 | #include "lttng-syscall.hpp" | |
24 | #include "notification-thread-commands.hpp" | |
25 | #include "notification-thread.hpp" | |
28ab034a JG |
26 | #include "rotation-thread.hpp" |
27 | #include "session.hpp" | |
28 | #include "timer.hpp" | |
29 | #include "tracker.hpp" | |
30 | #include "utils.hpp" | |
2f77fc4b | 31 | |
c9e313bc SM |
32 | #include <common/buffer-view.hpp> |
33 | #include <common/common.hpp> | |
34 | #include <common/compat/string.hpp> | |
35 | #include <common/defaults.hpp> | |
36 | #include <common/dynamic-buffer.hpp> | |
37 | #include <common/kernel-ctl/kernel-ctl.hpp> | |
38 | #include <common/payload-view.hpp> | |
39 | #include <common/payload.hpp> | |
40 | #include <common/relayd/relayd.hpp> | |
41 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
42 | #include <common/string-utils/string-utils.hpp> | |
43 | #include <common/trace-chunk.hpp> | |
56047f5a | 44 | #include <common/urcu.hpp> |
c9e313bc | 45 | #include <common/utils.hpp> |
28ab034a | 46 | |
c9e313bc | 47 | #include <lttng/action/action-internal.hpp> |
588c4b0d | 48 | #include <lttng/action/action.h> |
c9e313bc | 49 | #include <lttng/channel-internal.hpp> |
588c4b0d | 50 | #include <lttng/channel.h> |
c9e313bc | 51 | #include <lttng/condition/condition-internal.hpp> |
588c4b0d | 52 | #include <lttng/condition/condition.h> |
c9e313bc SM |
53 | #include <lttng/condition/event-rule-matches-internal.hpp> |
54 | #include <lttng/condition/event-rule-matches.h> | |
55 | #include <lttng/error-query-internal.hpp> | |
56 | #include <lttng/event-internal.hpp> | |
57 | #include <lttng/event-rule/event-rule-internal.hpp> | |
58 | #include <lttng/event-rule/event-rule.h> | |
49cddecd | 59 | #include <lttng/kernel.h> |
c9e313bc SM |
60 | #include <lttng/location-internal.hpp> |
61 | #include <lttng/lttng-error.h> | |
62 | #include <lttng/rotate-internal.hpp> | |
63 | #include <lttng/session-descriptor-internal.hpp> | |
64 | #include <lttng/session-internal.hpp> | |
65 | #include <lttng/tracker.h> | |
66 | #include <lttng/trigger/trigger-internal.hpp> | |
67 | #include <lttng/userspace-probe-internal.hpp> | |
2f77fc4b | 68 | |
28ab034a JG |
69 | #include <algorithm> |
70 | #include <inttypes.h> | |
71 | #include <stdio.h> | |
72 | #include <sys/stat.h> | |
73 | #include <urcu/list.h> | |
74 | #include <urcu/uatomic.h> | |
2f77fc4b | 75 | |
a503e1ef JG |
76 | /* Sleep for 100ms between each check for the shm path's deletion. */ |
77 | #define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000 | |
78 | ||
d7bfb9b0 JG |
79 | namespace lsu = lttng::sessiond::ust; |
80 | ||
f1494934 JG |
81 | static enum lttng_error_code wait_on_path(void *path); |
82 | ||
83 | namespace { | |
3e3665b8 JG |
84 | struct cmd_destroy_session_reply_context { |
85 | int reply_sock_fd; | |
86 | bool implicit_rotation_on_destroy; | |
3285a971 JG |
87 | /* |
88 | * Indicates whether or not an error occurred while launching the | |
89 | * destruction of a session. | |
90 | */ | |
91 | enum lttng_error_code destruction_status; | |
3e3665b8 JG |
92 | }; |
93 | ||
a503e1ef JG |
94 | /* |
95 | * Command completion handler that is used by the destroy command | |
96 | * when a session that has a non-default shm_path is being destroyed. | |
97 | * | |
98 | * See comment in cmd_destroy_session() for the rationale. | |
99 | */ | |
f1494934 | 100 | struct destroy_completion_handler { |
a503e1ef JG |
101 | struct cmd_completion_handler handler; |
102 | char shm_path[member_sizeof(struct ltt_session, shm_path)]; | |
103 | } destroy_completion_handler = { | |
28ab034a | 104 | .handler = { .run = wait_on_path, .data = destroy_completion_handler.shm_path }, |
a503e1ef JG |
105 | .shm_path = { 0 }, |
106 | }; | |
107 | ||
2f77fc4b DG |
108 | /* |
109 | * Used to keep a unique index for each relayd socket created where this value | |
110 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
111 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
112 | * held. | |
2f77fc4b | 113 | */ |
f1494934 JG |
114 | pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
115 | uint64_t relayd_net_seq_idx; | |
116 | } /* namespace */ | |
2f77fc4b | 117 | |
f1494934 | 118 | static struct cmd_completion_handler *current_completion_handler; |
7076b56e | 119 | static int validate_ust_event_name(const char *); |
d9a970b7 | 120 | static int cmd_enable_event_internal(ltt_session::locked_ref& session, |
28ab034a JG |
121 | const struct lttng_domain *domain, |
122 | char *channel_name, | |
123 | struct lttng_event *event, | |
124 | char *filter_expression, | |
125 | struct lttng_bytecode *filter, | |
126 | struct lttng_event_exclusion *exclusion, | |
127 | int wpipe); | |
d9a970b7 | 128 | static enum lttng_error_code cmd_enable_channel_internal(ltt_session::locked_ref& session, |
28ab034a JG |
129 | const struct lttng_domain *domain, |
130 | const struct lttng_channel *_attr, | |
131 | int wpipe); | |
7076b56e | 132 | |
2f77fc4b DG |
133 | /* |
134 | * Create a session path used by list_lttng_sessions for the case that the | |
135 | * session consumer is on the network. | |
136 | */ | |
a0a4f314 JG |
137 | static int |
138 | build_network_session_path(char *dst, size_t size, const ltt_session::locked_ref& session) | |
2f77fc4b DG |
139 | { |
140 | int ret, kdata_port, udata_port; | |
cd9adb8b | 141 | struct lttng_uri *kuri = nullptr, *uuri = nullptr, *uri = nullptr; |
2f77fc4b DG |
142 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; |
143 | ||
a0377dfe | 144 | LTTNG_ASSERT(dst); |
2f77fc4b DG |
145 | |
146 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
147 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
148 | ||
149 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
150 | ||
151 | if (session->kernel_session && session->kernel_session->consumer) { | |
152 | kuri = &session->kernel_session->consumer->dst.net.control; | |
153 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
154 | } | |
155 | ||
156 | if (session->ust_session && session->ust_session->consumer) { | |
157 | uuri = &session->ust_session->consumer->dst.net.control; | |
158 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
159 | } | |
160 | ||
cd9adb8b | 161 | if (uuri == nullptr && kuri == nullptr) { |
2f77fc4b DG |
162 | uri = &session->consumer->dst.net.control; |
163 | kdata_port = session->consumer->dst.net.data.port; | |
164 | } else if (kuri && uuri) { | |
165 | ret = uri_compare(kuri, uuri); | |
166 | if (ret) { | |
167 | /* Not Equal */ | |
168 | uri = kuri; | |
169 | /* Build uuri URL string */ | |
170 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
171 | if (ret < 0) { | |
172 | goto error; | |
173 | } | |
174 | } else { | |
175 | uri = kuri; | |
176 | } | |
cd9adb8b | 177 | } else if (kuri && uuri == nullptr) { |
2f77fc4b | 178 | uri = kuri; |
cd9adb8b | 179 | } else if (uuri && kuri == nullptr) { |
2f77fc4b DG |
180 | uri = uuri; |
181 | } | |
182 | ||
183 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
184 | if (ret < 0) { | |
185 | goto error; | |
186 | } | |
187 | ||
9aa9f900 DG |
188 | /* |
189 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
190 | * to print. | |
191 | */ | |
9d035200 | 192 | if (*tmp_uurl != '\0') { |
28ab034a JG |
193 | ret = snprintf(dst, |
194 | size, | |
195 | "[K]: %s [data: %d] -- [U]: %s [data: %d]", | |
196 | tmp_urls, | |
197 | kdata_port, | |
198 | tmp_uurl, | |
199 | udata_port); | |
2f77fc4b | 200 | } else { |
9aa9f900 | 201 | int dport; |
bef08707 | 202 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
203 | dport = kdata_port; |
204 | } else { | |
205 | /* No kernel URI, use the UST port. */ | |
206 | dport = udata_port; | |
207 | } | |
208 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
209 | } |
210 | ||
211 | error: | |
212 | return ret; | |
213 | } | |
214 | ||
fb83fe64 JD |
215 | /* |
216 | * Get run-time attributes if the session has been started (discarded events, | |
217 | * lost packets). | |
218 | */ | |
a0a4f314 | 219 | static int get_kernel_runtime_stats(const ltt_session::locked_ref& session, |
28ab034a JG |
220 | struct ltt_kernel_channel *kchan, |
221 | uint64_t *discarded_events, | |
222 | uint64_t *lost_packets) | |
fb83fe64 JD |
223 | { |
224 | int ret; | |
225 | ||
226 | if (!session->has_been_started) { | |
227 | ret = 0; | |
228 | *discarded_events = 0; | |
229 | *lost_packets = 0; | |
230 | goto end; | |
231 | } | |
232 | ||
28ab034a JG |
233 | ret = consumer_get_discarded_events( |
234 | session->id, kchan->key, session->kernel_session->consumer, discarded_events); | |
fb83fe64 JD |
235 | if (ret < 0) { |
236 | goto end; | |
237 | } | |
238 | ||
28ab034a JG |
239 | ret = consumer_get_lost_packets( |
240 | session->id, kchan->key, session->kernel_session->consumer, lost_packets); | |
fb83fe64 JD |
241 | if (ret < 0) { |
242 | goto end; | |
243 | } | |
244 | ||
245 | end: | |
246 | return ret; | |
247 | } | |
248 | ||
249 | /* | |
250 | * Get run-time attributes if the session has been started (discarded events, | |
251 | * lost packets). | |
252 | */ | |
a0a4f314 | 253 | static int get_ust_runtime_stats(const ltt_session::locked_ref& session, |
28ab034a JG |
254 | struct ltt_ust_channel *uchan, |
255 | uint64_t *discarded_events, | |
256 | uint64_t *lost_packets) | |
fb83fe64 JD |
257 | { |
258 | int ret; | |
259 | struct ltt_ust_session *usess; | |
260 | ||
a91c5803 JG |
261 | if (!discarded_events || !lost_packets) { |
262 | ret = -1; | |
263 | goto end; | |
264 | } | |
265 | ||
fb83fe64 | 266 | usess = session->ust_session; |
a0377dfe FD |
267 | LTTNG_ASSERT(discarded_events); |
268 | LTTNG_ASSERT(lost_packets); | |
fb83fe64 JD |
269 | |
270 | if (!usess || !session->has_been_started) { | |
271 | *discarded_events = 0; | |
272 | *lost_packets = 0; | |
273 | ret = 0; | |
274 | goto end; | |
275 | } | |
276 | ||
277 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
278 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
28ab034a JG |
279 | &usess->buffer_reg_uid_list, |
280 | usess->consumer, | |
281 | uchan->id, | |
282 | uchan->attr.overwrite, | |
283 | discarded_events, | |
284 | lost_packets); | |
fb83fe64 JD |
285 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { |
286 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
28ab034a JG |
287 | uchan, |
288 | usess->consumer, | |
289 | uchan->attr.overwrite, | |
290 | discarded_events, | |
291 | lost_packets); | |
fb83fe64 JD |
292 | if (ret < 0) { |
293 | goto end; | |
294 | } | |
295 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
296 | *lost_packets += uchan->per_pid_closed_app_lost; | |
297 | } else { | |
298 | ERR("Unsupported buffer type"); | |
a0377dfe | 299 | abort(); |
fb83fe64 JD |
300 | ret = -1; |
301 | goto end; | |
302 | } | |
303 | ||
304 | end: | |
305 | return ret; | |
306 | } | |
307 | ||
3c6a091f | 308 | /* |
022d91ba | 309 | * Create a list of agent domain events. |
3c6a091f DG |
310 | * |
311 | * Return number of events in list on success or else a negative value. | |
312 | */ | |
28ab034a JG |
313 | static enum lttng_error_code list_lttng_agent_events(struct agent *agt, |
314 | struct lttng_payload *reply_payload, | |
315 | unsigned int *nb_events) | |
3c6a091f | 316 | { |
8ddd72ef JR |
317 | enum lttng_error_code ret_code; |
318 | int ret = 0; | |
319 | unsigned int local_nb_events = 0; | |
320 | struct agent_event *event; | |
3c6a091f | 321 | struct lttng_ht_iter iter; |
8ddd72ef | 322 | unsigned long agent_event_count; |
3c6a091f | 323 | |
8ddd72ef JR |
324 | assert(agt); |
325 | assert(reply_payload); | |
3c6a091f | 326 | |
022d91ba | 327 | DBG3("Listing agent events"); |
3c6a091f | 328 | |
8ddd72ef JR |
329 | agent_event_count = lttng_ht_get_count(agt->events); |
330 | if (agent_event_count == 0) { | |
331 | /* Early exit. */ | |
332 | goto end; | |
333 | } | |
7966af57 | 334 | |
8ddd72ef JR |
335 | if (agent_event_count > UINT_MAX) { |
336 | ret_code = LTTNG_ERR_OVERFLOW; | |
337 | goto error; | |
338 | } | |
e368fb43 | 339 | |
8ddd72ef | 340 | local_nb_events = (unsigned int) agent_event_count; |
e368fb43 | 341 | |
56047f5a | 342 | { |
07c4863f | 343 | const lttng::urcu::read_lock_guard read_lock; |
8ddd72ef | 344 | |
56047f5a JG |
345 | cds_lfht_for_each_entry (agt->events->ht, &iter.iter, event, node.node) { |
346 | struct lttng_event *tmp_event = lttng_event_create(); | |
b4e3ceb9 | 347 | |
56047f5a JG |
348 | if (!tmp_event) { |
349 | ret_code = LTTNG_ERR_NOMEM; | |
350 | goto error; | |
351 | } | |
28ab034a | 352 | |
56047f5a JG |
353 | if (lttng_strncpy(tmp_event->name, event->name, sizeof(tmp_event->name))) { |
354 | lttng_event_destroy(tmp_event); | |
355 | ret_code = LTTNG_ERR_FATAL; | |
356 | goto error; | |
357 | } | |
3c6a091f | 358 | |
56047f5a JG |
359 | tmp_event->name[sizeof(tmp_event->name) - 1] = '\0'; |
360 | tmp_event->enabled = !!event->enabled_count; | |
361 | tmp_event->loglevel = event->loglevel_value; | |
362 | tmp_event->loglevel_type = event->loglevel_type; | |
363 | ||
364 | ret = lttng_event_serialize(tmp_event, | |
365 | 0, | |
366 | nullptr, | |
367 | event->filter_expression, | |
368 | 0, | |
369 | nullptr, | |
370 | reply_payload); | |
371 | lttng_event_destroy(tmp_event); | |
372 | if (ret) { | |
373 | ret_code = LTTNG_ERR_FATAL; | |
374 | goto error; | |
375 | } | |
3c02e545 | 376 | } |
3c6a091f | 377 | } |
47e52862 | 378 | end: |
8ddd72ef JR |
379 | ret_code = LTTNG_OK; |
380 | *nb_events = local_nb_events; | |
381 | error: | |
8ddd72ef | 382 | return ret_code; |
3c6a091f DG |
383 | } |
384 | ||
2f77fc4b DG |
385 | /* |
386 | * Create a list of ust global domain events. | |
387 | */ | |
8ddd72ef | 388 | static enum lttng_error_code list_lttng_ust_global_events(char *channel_name, |
28ab034a JG |
389 | struct ltt_ust_domain_global *ust_global, |
390 | struct lttng_payload *reply_payload, | |
391 | unsigned int *nb_events) | |
2f77fc4b | 392 | { |
8ddd72ef JR |
393 | enum lttng_error_code ret_code; |
394 | int ret; | |
2f77fc4b | 395 | struct lttng_ht_iter iter; |
8ddd72ef JR |
396 | struct lttng_ht_node_str *node; |
397 | struct ltt_ust_channel *uchan; | |
398 | struct ltt_ust_event *uevent; | |
399 | unsigned long channel_event_count; | |
400 | unsigned int local_nb_events = 0; | |
401 | ||
402 | assert(reply_payload); | |
403 | assert(nb_events); | |
2f77fc4b DG |
404 | |
405 | DBG("Listing UST global events for channel %s", channel_name); | |
406 | ||
07c4863f | 407 | const lttng::urcu::read_lock_guard read_lock; |
2f77fc4b | 408 | |
e368fb43 | 409 | lttng_ht_lookup(ust_global->channels, (void *) channel_name, &iter); |
00d7d903 | 410 | node = lttng_ht_iter_get_node<lttng_ht_node_str>(&iter); |
cd9adb8b | 411 | if (node == nullptr) { |
8ddd72ef | 412 | ret_code = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
e68d8bdb | 413 | goto error; |
2f77fc4b DG |
414 | } |
415 | ||
416 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
417 | ||
8ddd72ef JR |
418 | channel_event_count = lttng_ht_get_count(uchan->events); |
419 | if (channel_event_count == 0) { | |
420 | /* Early exit. */ | |
421 | ret_code = LTTNG_OK; | |
422 | goto end; | |
423 | } | |
424 | ||
425 | if (channel_event_count > UINT_MAX) { | |
426 | ret_code = LTTNG_ERR_OVERFLOW; | |
427 | goto error; | |
428 | } | |
429 | ||
430 | local_nb_events = (unsigned int) channel_event_count; | |
431 | ||
432 | DBG3("Listing UST global %d events", *nb_events); | |
2f77fc4b | 433 | |
28ab034a | 434 | cds_lfht_for_each_entry (uchan->events->ht, &iter.iter, uevent, node.node) { |
cd9adb8b | 435 | struct lttng_event *tmp_event = nullptr; |
e368fb43 | 436 | |
b4e3ceb9 | 437 | if (uevent->internal) { |
8ddd72ef JR |
438 | /* This event should remain hidden from clients */ |
439 | local_nb_events--; | |
b4e3ceb9 PP |
440 | continue; |
441 | } | |
442 | ||
8ddd72ef JR |
443 | tmp_event = lttng_event_create(); |
444 | if (!tmp_event) { | |
445 | ret_code = LTTNG_ERR_NOMEM; | |
e68d8bdb | 446 | goto error; |
43ed1485 | 447 | } |
2f77fc4b | 448 | |
28ab034a | 449 | if (lttng_strncpy(tmp_event->name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN)) { |
8ddd72ef JR |
450 | ret_code = LTTNG_ERR_FATAL; |
451 | lttng_event_destroy(tmp_event); | |
e68d8bdb | 452 | goto error; |
8ddd72ef JR |
453 | } |
454 | ||
455 | tmp_event->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
456 | tmp_event->enabled = uevent->enabled; | |
2f77fc4b DG |
457 | |
458 | switch (uevent->attr.instrumentation) { | |
fc4b93fa | 459 | case LTTNG_UST_ABI_TRACEPOINT: |
8ddd72ef | 460 | tmp_event->type = LTTNG_EVENT_TRACEPOINT; |
2f77fc4b | 461 | break; |
fc4b93fa | 462 | case LTTNG_UST_ABI_PROBE: |
8ddd72ef | 463 | tmp_event->type = LTTNG_EVENT_PROBE; |
2f77fc4b | 464 | break; |
fc4b93fa | 465 | case LTTNG_UST_ABI_FUNCTION: |
8ddd72ef | 466 | tmp_event->type = LTTNG_EVENT_FUNCTION; |
2f77fc4b DG |
467 | break; |
468 | } | |
469 | ||
8ddd72ef | 470 | tmp_event->loglevel = uevent->attr.loglevel; |
2f77fc4b | 471 | switch (uevent->attr.loglevel_type) { |
fc4b93fa | 472 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
8ddd72ef | 473 | tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
2f77fc4b | 474 | break; |
fc4b93fa | 475 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
8ddd72ef | 476 | tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
2f77fc4b | 477 | break; |
fc4b93fa | 478 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
8ddd72ef | 479 | tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
2f77fc4b DG |
480 | break; |
481 | } | |
482 | if (uevent->filter) { | |
8ddd72ef | 483 | tmp_event->filter = 1; |
2f77fc4b | 484 | } |
4634f12e | 485 | if (uevent->exclusion) { |
8ddd72ef | 486 | tmp_event->exclusion = 1; |
4634f12e | 487 | } |
b4e3ceb9 | 488 | |
dd7ef124 JG |
489 | std::vector<const char *> exclusion_names; |
490 | if (uevent->exclusion) { | |
491 | for (int i = 0; i < uevent->exclusion->count; i++) { | |
492 | exclusion_names.emplace_back( | |
493 | LTTNG_EVENT_EXCLUSION_NAME_AT(uevent->exclusion, i)); | |
494 | } | |
495 | } | |
496 | ||
8ddd72ef JR |
497 | /* |
498 | * We do not care about the filter bytecode and the fd from the | |
499 | * userspace_probe_location. | |
500 | */ | |
1e0019bb JG |
501 | ret = lttng_event_serialize(tmp_event, |
502 | exclusion_names.size(), | |
503 | exclusion_names.size() ? 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 | */ | |
a0a4f314 | 649 | static enum lttng_error_code add_uri_to_consumer(const ltt_session::locked_ref& session, |
28ab034a JG |
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) { |
07c4863f | 757 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 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 | */ | |
a0a4f314 | 1017 | int cmd_setup_relayd(const ltt_session::locked_ref& 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 | |
2f77fc4b DG |
1026 | usess = session->ust_session; |
1027 | ksess = session->kernel_session; | |
1028 | ||
785d2d0d | 1029 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1030 | |
1e791a74 | 1031 | if (session->current_trace_chunk) { |
07c4863f | 1032 | const lttng_trace_chunk_status status = lttng_trace_chunk_get_id( |
28ab034a | 1033 | session->current_trace_chunk, ¤t_chunk_id.value); |
1e791a74 JG |
1034 | |
1035 | if (status == LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1036 | current_chunk_id.is_set = true; | |
1037 | } else { | |
1038 | ERR("Failed to get current trace chunk id"); | |
1039 | ret = LTTNG_ERR_UNK; | |
1040 | goto error; | |
1041 | } | |
1042 | } | |
1043 | ||
28ab034a JG |
1044 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET && |
1045 | usess->consumer->enabled) { | |
2f77fc4b | 1046 | /* For each consumer socket, send relayd sockets */ |
07c4863f | 1047 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 1048 | |
28ab034a JG |
1049 | cds_lfht_for_each_entry ( |
1050 | usess->consumer->socks->ht, &iter.iter, socket, node.node) { | |
2f77fc4b | 1051 | pthread_mutex_lock(socket->lock); |
28ab034a JG |
1052 | ret = send_consumer_relayd_sockets( |
1053 | session->id, | |
1054 | usess->consumer, | |
1055 | socket, | |
1056 | session->name, | |
1057 | session->hostname, | |
1058 | session->base_path, | |
1059 | session->live_timer, | |
cd9adb8b | 1060 | current_chunk_id.is_set ? ¤t_chunk_id.value : nullptr, |
28ab034a JG |
1061 | session->creation_time, |
1062 | session->name_contains_creation_time); | |
2f77fc4b | 1063 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1064 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1065 | goto error; |
1066 | } | |
6dc3064a DG |
1067 | /* Session is now ready for network streaming. */ |
1068 | session->net_handle = 1; | |
2f77fc4b | 1069 | } |
56047f5a | 1070 | |
28ab034a JG |
1071 | session->consumer->relay_major_version = usess->consumer->relay_major_version; |
1072 | session->consumer->relay_minor_version = usess->consumer->relay_minor_version; | |
1073 | session->consumer->relay_allows_clear = usess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1074 | } |
1075 | ||
28ab034a JG |
1076 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET && |
1077 | ksess->consumer->enabled) { | |
07c4863f | 1078 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 1079 | |
28ab034a JG |
1080 | cds_lfht_for_each_entry ( |
1081 | ksess->consumer->socks->ht, &iter.iter, socket, node.node) { | |
2f77fc4b | 1082 | pthread_mutex_lock(socket->lock); |
28ab034a JG |
1083 | ret = send_consumer_relayd_sockets( |
1084 | session->id, | |
1085 | ksess->consumer, | |
1086 | socket, | |
1087 | session->name, | |
1088 | session->hostname, | |
1089 | session->base_path, | |
1090 | session->live_timer, | |
cd9adb8b | 1091 | current_chunk_id.is_set ? ¤t_chunk_id.value : nullptr, |
28ab034a JG |
1092 | session->creation_time, |
1093 | session->name_contains_creation_time); | |
2f77fc4b | 1094 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1095 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1096 | goto error; |
1097 | } | |
6dc3064a DG |
1098 | /* Session is now ready for network streaming. */ |
1099 | session->net_handle = 1; | |
2f77fc4b | 1100 | } |
56047f5a | 1101 | |
28ab034a JG |
1102 | session->consumer->relay_major_version = ksess->consumer->relay_major_version; |
1103 | session->consumer->relay_minor_version = ksess->consumer->relay_minor_version; | |
1104 | session->consumer->relay_allows_clear = ksess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1105 | } |
1106 | ||
1107 | error: | |
1108 | return ret; | |
1109 | } | |
1110 | ||
9b6c7ec5 DG |
1111 | /* |
1112 | * Start a kernel session by opening all necessary streams. | |
1113 | */ | |
4dbe1875 | 1114 | int start_kernel_session(struct ltt_kernel_session *ksess) |
9b6c7ec5 DG |
1115 | { |
1116 | int ret; | |
1117 | struct ltt_kernel_channel *kchan; | |
1118 | ||
1119 | /* Open kernel metadata */ | |
cd9adb8b | 1120 | if (ksess->metadata == nullptr && ksess->output_traces) { |
9b6c7ec5 DG |
1121 | ret = kernel_open_metadata(ksess); |
1122 | if (ret < 0) { | |
1123 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1124 | goto error; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* Open kernel metadata stream */ | |
07b86b52 | 1129 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1130 | ret = kernel_open_metadata_stream(ksess); |
1131 | if (ret < 0) { | |
1132 | ERR("Kernel create metadata stream failed"); | |
1133 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1134 | goto error; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | /* For each channel */ | |
28ab034a | 1139 | cds_list_for_each_entry (kchan, &ksess->channel_list.head, list) { |
9b6c7ec5 DG |
1140 | if (kchan->stream_count == 0) { |
1141 | ret = kernel_open_channel_stream(kchan); | |
1142 | if (ret < 0) { | |
1143 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1144 | goto error; | |
1145 | } | |
1146 | /* Update the stream global counter */ | |
1147 | ksess->stream_count_global += ret; | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | /* Setup kernel consumer socket and send fds to it */ | |
1152 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1153 | if (ret != 0) { |
9b6c7ec5 DG |
1154 | ret = LTTNG_ERR_KERN_START_FAIL; |
1155 | goto error; | |
1156 | } | |
1157 | ||
1158 | /* This start the kernel tracing */ | |
1159 | ret = kernel_start_session(ksess); | |
1160 | if (ret < 0) { | |
1161 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1162 | goto error; | |
1163 | } | |
1164 | ||
1165 | /* Quiescent wait after starting trace */ | |
7d268848 | 1166 | kernel_wait_quiescent(); |
9b6c7ec5 | 1167 | |
66cefebd | 1168 | ksess->active = true; |
9b6c7ec5 DG |
1169 | |
1170 | ret = LTTNG_OK; | |
1171 | ||
1172 | error: | |
1173 | return ret; | |
1174 | } | |
1175 | ||
4dbe1875 MD |
1176 | int stop_kernel_session(struct ltt_kernel_session *ksess) |
1177 | { | |
1178 | struct ltt_kernel_channel *kchan; | |
1179 | bool error_occurred = false; | |
1180 | int ret; | |
1181 | ||
1182 | if (!ksess || !ksess->active) { | |
1183 | return LTTNG_OK; | |
1184 | } | |
1185 | DBG("Stopping kernel tracing"); | |
1186 | ||
1187 | ret = kernel_stop_session(ksess); | |
1188 | if (ret < 0) { | |
1189 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1190 | goto error; | |
1191 | } | |
1192 | ||
1193 | kernel_wait_quiescent(); | |
1194 | ||
1195 | /* Flush metadata after stopping (if exists) */ | |
1196 | if (ksess->metadata_stream_fd >= 0) { | |
1197 | ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd); | |
1198 | if (ret < 0) { | |
1199 | ERR("Kernel metadata flush failed"); | |
1200 | error_occurred = true; | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | /* Flush all buffers after stopping */ | |
28ab034a | 1205 | cds_list_for_each_entry (kchan, &ksess->channel_list.head, list) { |
4dbe1875 MD |
1206 | ret = kernel_flush_buffer(kchan); |
1207 | if (ret < 0) { | |
1208 | ERR("Kernel flush buffer error"); | |
1209 | error_occurred = true; | |
1210 | } | |
1211 | } | |
1212 | ||
66cefebd | 1213 | ksess->active = false; |
4dbe1875 MD |
1214 | if (error_occurred) { |
1215 | ret = LTTNG_ERR_UNK; | |
1216 | } else { | |
1217 | ret = LTTNG_OK; | |
1218 | } | |
1219 | error: | |
1220 | return ret; | |
1221 | } | |
1222 | ||
2f77fc4b DG |
1223 | /* |
1224 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1225 | */ | |
a0a4f314 | 1226 | int cmd_disable_channel(const ltt_session::locked_ref& session, |
28ab034a JG |
1227 | enum lttng_domain_type domain, |
1228 | char *channel_name) | |
2f77fc4b DG |
1229 | { |
1230 | int ret; | |
1231 | struct ltt_ust_session *usess; | |
1232 | ||
1233 | usess = session->ust_session; | |
1234 | ||
07c4863f | 1235 | const lttng::urcu::read_lock_guard read_lock; |
2223c96f | 1236 | |
2f77fc4b DG |
1237 | switch (domain) { |
1238 | case LTTNG_DOMAIN_KERNEL: | |
1239 | { | |
28ab034a | 1240 | ret = channel_kernel_disable(session->kernel_session, channel_name); |
f73fabfd | 1241 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1242 | goto error; |
1243 | } | |
1244 | ||
7d268848 | 1245 | kernel_wait_quiescent(); |
2f77fc4b DG |
1246 | break; |
1247 | } | |
1248 | case LTTNG_DOMAIN_UST: | |
1249 | { | |
1250 | struct ltt_ust_channel *uchan; | |
1251 | struct lttng_ht *chan_ht; | |
1252 | ||
1253 | chan_ht = usess->domain_global.channels; | |
1254 | ||
1255 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
cd9adb8b | 1256 | if (uchan == nullptr) { |
f73fabfd | 1257 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1258 | goto error; |
1259 | } | |
1260 | ||
7972aab2 | 1261 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1262 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1263 | goto error; |
1264 | } | |
1265 | break; | |
1266 | } | |
2f77fc4b | 1267 | default: |
f73fabfd | 1268 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1269 | goto error; |
1270 | } | |
1271 | ||
f73fabfd | 1272 | ret = LTTNG_OK; |
2f77fc4b DG |
1273 | |
1274 | error: | |
1275 | return ret; | |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1280 | * | |
1281 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1282 | */ | |
d9a970b7 | 1283 | int cmd_enable_channel(command_ctx *cmd_ctx, ltt_session::locked_ref& session, int sock, int wpipe) |
999af9c1 JR |
1284 | { |
1285 | int ret; | |
1286 | size_t channel_len; | |
1287 | ssize_t sock_recv_len; | |
cd9adb8b | 1288 | struct lttng_channel *channel = nullptr; |
999af9c1 JR |
1289 | struct lttng_buffer_view view; |
1290 | struct lttng_dynamic_buffer channel_buffer; | |
1291 | const struct lttng_domain command_domain = cmd_ctx->lsm.domain; | |
1292 | ||
1293 | lttng_dynamic_buffer_init(&channel_buffer); | |
1294 | channel_len = (size_t) cmd_ctx->lsm.u.channel.length; | |
1295 | ret = lttng_dynamic_buffer_set_size(&channel_buffer, channel_len); | |
1296 | if (ret) { | |
1297 | ret = LTTNG_ERR_NOMEM; | |
1298 | goto end; | |
1299 | } | |
1300 | ||
28ab034a | 1301 | sock_recv_len = lttcomm_recv_unix_sock(sock, channel_buffer.data, channel_len); |
999af9c1 JR |
1302 | if (sock_recv_len < 0 || sock_recv_len != channel_len) { |
1303 | ERR("Failed to receive \"enable channel\" command payload"); | |
1304 | ret = LTTNG_ERR_INVALID; | |
1305 | goto end; | |
1306 | } | |
1307 | ||
1308 | view = lttng_buffer_view_from_dynamic_buffer(&channel_buffer, 0, channel_len); | |
1309 | if (!lttng_buffer_view_is_valid(&view)) { | |
1310 | ret = LTTNG_ERR_INVALID; | |
1311 | goto end; | |
1312 | } | |
1313 | ||
1314 | if (lttng_channel_create_from_buffer(&view, &channel) != channel_len) { | |
1315 | ERR("Invalid channel payload received in \"enable channel\" command"); | |
1316 | ret = LTTNG_ERR_INVALID; | |
1317 | goto end; | |
1318 | } | |
1319 | ||
d9a970b7 | 1320 | ret = cmd_enable_channel_internal(session, &command_domain, channel, wpipe); |
999af9c1 JR |
1321 | |
1322 | end: | |
1323 | lttng_dynamic_buffer_reset(&channel_buffer); | |
1324 | lttng_channel_destroy(channel); | |
1325 | return ret; | |
1326 | } | |
1327 | ||
d9a970b7 | 1328 | static enum lttng_error_code cmd_enable_channel_internal(ltt_session::locked_ref& session, |
28ab034a JG |
1329 | const struct lttng_domain *domain, |
1330 | const struct lttng_channel *_attr, | |
1331 | int wpipe) | |
2f77fc4b | 1332 | { |
4878de5c | 1333 | enum lttng_error_code ret_code; |
a0a4f314 | 1334 | struct ltt_ust_session *usess = session->ust_session; |
2f77fc4b | 1335 | struct lttng_ht *chan_ht; |
1f345e94 | 1336 | size_t len; |
cd9adb8b | 1337 | struct lttng_channel *attr = nullptr; |
2f77fc4b | 1338 | |
a0377dfe FD |
1339 | LTTNG_ASSERT(_attr); |
1340 | LTTNG_ASSERT(domain); | |
2f77fc4b | 1341 | |
07c4863f | 1342 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 1343 | |
999af9c1 JR |
1344 | attr = lttng_channel_copy(_attr); |
1345 | if (!attr) { | |
4878de5c | 1346 | ret_code = LTTNG_ERR_NOMEM; |
999af9c1 JR |
1347 | goto end; |
1348 | } | |
1349 | ||
1350 | len = lttng_strnlen(attr->name, sizeof(attr->name)); | |
1f345e94 PP |
1351 | |
1352 | /* Validate channel name */ | |
cd9adb8b | 1353 | if (attr->name[0] == '.' || memchr(attr->name, '/', len) != nullptr) { |
4878de5c | 1354 | ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME; |
1f345e94 PP |
1355 | goto end; |
1356 | } | |
1357 | ||
999af9c1 | 1358 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
2f77fc4b | 1359 | |
ecc48a90 JD |
1360 | /* |
1361 | * If the session is a live session, remove the switch timer, the | |
1362 | * live timer does the same thing but sends also synchronisation | |
1363 | * beacons for inactive streams. | |
1364 | */ | |
a0a4f314 JG |
1365 | if (session->live_timer > 0) { |
1366 | attr->attr.live_timer_interval = session->live_timer; | |
999af9c1 | 1367 | attr->attr.switch_timer_interval = 0; |
ecc48a90 JD |
1368 | } |
1369 | ||
6e21424e JR |
1370 | /* Check for feature support */ |
1371 | switch (domain->type) { | |
1372 | case LTTNG_DOMAIN_KERNEL: | |
1373 | { | |
7d268848 | 1374 | if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) { |
6e21424e JR |
1375 | /* Sampling position of buffer is not supported */ |
1376 | WARN("Kernel tracer does not support buffer monitoring. " | |
28ab034a JG |
1377 | "Setting the monitor interval timer to 0 " |
1378 | "(disabled) for channel '%s' of session '%s'", | |
1379 | attr->name, | |
a0a4f314 | 1380 | session->name); |
999af9c1 | 1381 | lttng_channel_set_monitor_timer_interval(attr, 0); |
6e21424e JR |
1382 | } |
1383 | break; | |
1384 | } | |
1385 | case LTTNG_DOMAIN_UST: | |
f28f9e44 | 1386 | break; |
6e21424e JR |
1387 | case LTTNG_DOMAIN_JUL: |
1388 | case LTTNG_DOMAIN_LOG4J: | |
1389 | case LTTNG_DOMAIN_PYTHON: | |
f28f9e44 JG |
1390 | if (!agent_tracing_is_enabled()) { |
1391 | DBG("Attempted to enable a channel in an agent domain but the agent thread is not running"); | |
4878de5c | 1392 | ret_code = LTTNG_ERR_AGENT_TRACING_DISABLED; |
f28f9e44 JG |
1393 | goto error; |
1394 | } | |
6e21424e JR |
1395 | break; |
1396 | default: | |
4878de5c | 1397 | ret_code = LTTNG_ERR_UNKNOWN_DOMAIN; |
6e21424e JR |
1398 | goto error; |
1399 | } | |
1400 | ||
7972aab2 | 1401 | switch (domain->type) { |
2f77fc4b DG |
1402 | case LTTNG_DOMAIN_KERNEL: |
1403 | { | |
1404 | struct ltt_kernel_channel *kchan; | |
1405 | ||
28ab034a | 1406 | kchan = trace_kernel_get_channel_by_name(attr->name, session->kernel_session); |
cd9adb8b | 1407 | if (kchan == nullptr) { |
8cc65d5c JR |
1408 | /* |
1409 | * Don't try to create a channel if the session has been started at | |
1410 | * some point in time before. The tracer does not allow it. | |
1411 | */ | |
1412 | if (session->has_been_started) { | |
4878de5c | 1413 | ret_code = LTTNG_ERR_TRACE_ALREADY_STARTED; |
8cc65d5c JR |
1414 | goto error; |
1415 | } | |
1416 | ||
28ab034a | 1417 | if (session->snapshot.nb_output > 0 || session->snapshot_mode) { |
54213acc | 1418 | /* Enforce mmap output for snapshot sessions. */ |
999af9c1 | 1419 | attr->attr.output = LTTNG_EVENT_MMAP; |
54213acc | 1420 | } |
28ab034a | 1421 | ret_code = channel_kernel_create(session->kernel_session, attr, wpipe); |
999af9c1 | 1422 | if (attr->name[0] != '\0') { |
85076754 MD |
1423 | session->kernel_session->has_non_default_channel = 1; |
1424 | } | |
2f77fc4b | 1425 | } else { |
4878de5c | 1426 | ret_code = channel_kernel_enable(session->kernel_session, kchan); |
2f77fc4b DG |
1427 | } |
1428 | ||
4878de5c | 1429 | if (ret_code != LTTNG_OK) { |
2f77fc4b DG |
1430 | goto error; |
1431 | } | |
1432 | ||
7d268848 | 1433 | kernel_wait_quiescent(); |
2f77fc4b DG |
1434 | break; |
1435 | } | |
1436 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1437 | case LTTNG_DOMAIN_JUL: |
1438 | case LTTNG_DOMAIN_LOG4J: | |
1439 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1440 | { |
1441 | struct ltt_ust_channel *uchan; | |
1442 | ||
9232818f JG |
1443 | /* |
1444 | * FIXME | |
1445 | * | |
1446 | * Current agent implementation limitations force us to allow | |
1447 | * only one channel at once in "agent" subdomains. Each | |
1448 | * subdomain has a default channel name which must be strictly | |
1449 | * adhered to. | |
1450 | */ | |
1451 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
5c7248cd JG |
1452 | if (strncmp(attr->name, |
1453 | DEFAULT_JUL_CHANNEL_NAME, | |
1454 | LTTNG_SYMBOL_NAME_LEN - 1) != 0) { | |
4878de5c | 1455 | ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME; |
9232818f JG |
1456 | goto error; |
1457 | } | |
1458 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
5c7248cd JG |
1459 | if (strncmp(attr->name, |
1460 | DEFAULT_LOG4J_CHANNEL_NAME, | |
1461 | LTTNG_SYMBOL_NAME_LEN - 1) != 0) { | |
4878de5c | 1462 | ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME; |
9232818f JG |
1463 | goto error; |
1464 | } | |
1465 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
28ab034a JG |
1466 | if (strncmp(attr->name, |
1467 | DEFAULT_PYTHON_CHANNEL_NAME, | |
5c7248cd | 1468 | LTTNG_SYMBOL_NAME_LEN - 1) != 0) { |
4878de5c | 1469 | ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME; |
9232818f JG |
1470 | goto error; |
1471 | } | |
1472 | } | |
1473 | ||
2f77fc4b DG |
1474 | chan_ht = usess->domain_global.channels; |
1475 | ||
999af9c1 | 1476 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
cd9adb8b | 1477 | if (uchan == nullptr) { |
8cc65d5c JR |
1478 | /* |
1479 | * Don't try to create a channel if the session has been started at | |
1480 | * some point in time before. The tracer does not allow it. | |
1481 | */ | |
1482 | if (session->has_been_started) { | |
4878de5c | 1483 | ret_code = LTTNG_ERR_TRACE_ALREADY_STARTED; |
8cc65d5c JR |
1484 | goto error; |
1485 | } | |
1486 | ||
4878de5c | 1487 | ret_code = channel_ust_create(usess, attr, domain->buf_type); |
999af9c1 | 1488 | if (attr->name[0] != '\0') { |
85076754 MD |
1489 | usess->has_non_default_channel = 1; |
1490 | } | |
2f77fc4b | 1491 | } else { |
4878de5c | 1492 | ret_code = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1493 | } |
1494 | break; | |
1495 | } | |
2f77fc4b | 1496 | default: |
4878de5c | 1497 | ret_code = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1498 | goto error; |
1499 | } | |
1500 | ||
4878de5c | 1501 | if (ret_code == LTTNG_OK && attr->attr.output != LTTNG_EVENT_MMAP) { |
54213acc JG |
1502 | session->has_non_mmap_channel = true; |
1503 | } | |
2f77fc4b | 1504 | error: |
1f345e94 | 1505 | end: |
999af9c1 | 1506 | lttng_channel_destroy(attr); |
4878de5c | 1507 | return ret_code; |
2f77fc4b DG |
1508 | } |
1509 | ||
28ab034a | 1510 | enum lttng_error_code |
a0a4f314 | 1511 | cmd_process_attr_tracker_get_tracking_policy(const ltt_session::locked_ref& session, |
28ab034a JG |
1512 | enum lttng_domain_type domain, |
1513 | enum lttng_process_attr process_attr, | |
1514 | enum lttng_tracking_policy *policy) | |
159b042f JG |
1515 | { |
1516 | enum lttng_error_code ret_code = LTTNG_OK; | |
1517 | const struct process_attr_tracker *tracker; | |
1518 | ||
1519 | switch (domain) { | |
1520 | case LTTNG_DOMAIN_KERNEL: | |
1521 | if (!session->kernel_session) { | |
1522 | ret_code = LTTNG_ERR_INVALID; | |
1523 | goto end; | |
1524 | } | |
28ab034a | 1525 | tracker = kernel_get_process_attr_tracker(session->kernel_session, process_attr); |
159b042f JG |
1526 | break; |
1527 | case LTTNG_DOMAIN_UST: | |
1528 | if (!session->ust_session) { | |
1529 | ret_code = LTTNG_ERR_INVALID; | |
1530 | goto end; | |
1531 | } | |
28ab034a | 1532 | tracker = trace_ust_get_process_attr_tracker(session->ust_session, process_attr); |
159b042f JG |
1533 | break; |
1534 | default: | |
1535 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1536 | goto end; | |
1537 | } | |
1538 | if (tracker) { | |
1539 | *policy = process_attr_tracker_get_tracking_policy(tracker); | |
1540 | } else { | |
1541 | ret_code = LTTNG_ERR_INVALID; | |
1542 | } | |
1543 | end: | |
1544 | return ret_code; | |
1545 | } | |
1546 | ||
28ab034a | 1547 | enum lttng_error_code |
a0a4f314 | 1548 | cmd_process_attr_tracker_set_tracking_policy(const ltt_session::locked_ref& session, |
28ab034a JG |
1549 | enum lttng_domain_type domain, |
1550 | enum lttng_process_attr process_attr, | |
1551 | enum lttng_tracking_policy policy) | |
159b042f JG |
1552 | { |
1553 | enum lttng_error_code ret_code = LTTNG_OK; | |
1554 | ||
1555 | switch (policy) { | |
1556 | case LTTNG_TRACKING_POLICY_INCLUDE_SET: | |
1557 | case LTTNG_TRACKING_POLICY_EXCLUDE_ALL: | |
1558 | case LTTNG_TRACKING_POLICY_INCLUDE_ALL: | |
1559 | break; | |
1560 | default: | |
1561 | ret_code = LTTNG_ERR_INVALID; | |
1562 | goto end; | |
1563 | } | |
1564 | ||
1565 | switch (domain) { | |
1566 | case LTTNG_DOMAIN_KERNEL: | |
1567 | if (!session->kernel_session) { | |
1568 | ret_code = LTTNG_ERR_INVALID; | |
1569 | goto end; | |
1570 | } | |
1571 | ret_code = kernel_process_attr_tracker_set_tracking_policy( | |
28ab034a | 1572 | session->kernel_session, process_attr, policy); |
159b042f JG |
1573 | break; |
1574 | case LTTNG_DOMAIN_UST: | |
1575 | if (!session->ust_session) { | |
1576 | ret_code = LTTNG_ERR_INVALID; | |
1577 | goto end; | |
1578 | } | |
1579 | ret_code = trace_ust_process_attr_tracker_set_tracking_policy( | |
28ab034a | 1580 | session->ust_session, process_attr, policy); |
159b042f JG |
1581 | break; |
1582 | default: | |
1583 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1584 | break; | |
1585 | } | |
1586 | end: | |
1587 | return ret_code; | |
1588 | } | |
1589 | ||
28ab034a | 1590 | enum lttng_error_code |
a0a4f314 | 1591 | cmd_process_attr_tracker_inclusion_set_add_value(const ltt_session::locked_ref& session, |
28ab034a JG |
1592 | enum lttng_domain_type domain, |
1593 | enum lttng_process_attr process_attr, | |
1594 | const struct process_attr_value *value) | |
159b042f JG |
1595 | { |
1596 | enum lttng_error_code ret_code = LTTNG_OK; | |
1597 | ||
1598 | switch (domain) { | |
1599 | case LTTNG_DOMAIN_KERNEL: | |
1600 | if (!session->kernel_session) { | |
1601 | ret_code = LTTNG_ERR_INVALID; | |
1602 | goto end; | |
1603 | } | |
1604 | ret_code = kernel_process_attr_tracker_inclusion_set_add_value( | |
28ab034a | 1605 | session->kernel_session, process_attr, value); |
159b042f JG |
1606 | break; |
1607 | case LTTNG_DOMAIN_UST: | |
1608 | if (!session->ust_session) { | |
1609 | ret_code = LTTNG_ERR_INVALID; | |
1610 | goto end; | |
1611 | } | |
1612 | ret_code = trace_ust_process_attr_tracker_inclusion_set_add_value( | |
28ab034a | 1613 | session->ust_session, process_attr, value); |
159b042f JG |
1614 | break; |
1615 | default: | |
1616 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1617 | break; | |
1618 | } | |
1619 | end: | |
1620 | return ret_code; | |
1621 | } | |
1622 | ||
28ab034a | 1623 | enum lttng_error_code |
a0a4f314 | 1624 | cmd_process_attr_tracker_inclusion_set_remove_value(const ltt_session::locked_ref& session, |
28ab034a JG |
1625 | enum lttng_domain_type domain, |
1626 | enum lttng_process_attr process_attr, | |
1627 | const struct process_attr_value *value) | |
159b042f JG |
1628 | { |
1629 | enum lttng_error_code ret_code = LTTNG_OK; | |
1630 | ||
1631 | switch (domain) { | |
1632 | case LTTNG_DOMAIN_KERNEL: | |
1633 | if (!session->kernel_session) { | |
1634 | ret_code = LTTNG_ERR_INVALID; | |
1635 | goto end; | |
1636 | } | |
1637 | ret_code = kernel_process_attr_tracker_inclusion_set_remove_value( | |
28ab034a | 1638 | session->kernel_session, process_attr, value); |
159b042f JG |
1639 | break; |
1640 | case LTTNG_DOMAIN_UST: | |
1641 | if (!session->ust_session) { | |
1642 | ret_code = LTTNG_ERR_INVALID; | |
1643 | goto end; | |
1644 | } | |
1645 | ret_code = trace_ust_process_attr_tracker_inclusion_set_remove_value( | |
28ab034a | 1646 | session->ust_session, process_attr, value); |
159b042f JG |
1647 | break; |
1648 | default: | |
1649 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1650 | break; | |
1651 | } | |
1652 | end: | |
1653 | return ret_code; | |
1654 | } | |
1655 | ||
28ab034a | 1656 | enum lttng_error_code |
a0a4f314 | 1657 | cmd_process_attr_tracker_get_inclusion_set(const ltt_session::locked_ref& session, |
28ab034a JG |
1658 | enum lttng_domain_type domain, |
1659 | enum lttng_process_attr process_attr, | |
1660 | struct lttng_process_attr_values **values) | |
159b042f JG |
1661 | { |
1662 | enum lttng_error_code ret_code = LTTNG_OK; | |
1663 | const struct process_attr_tracker *tracker; | |
1664 | enum process_attr_tracker_status status; | |
1665 | ||
1666 | switch (domain) { | |
1667 | case LTTNG_DOMAIN_KERNEL: | |
1668 | if (!session->kernel_session) { | |
1669 | ret_code = LTTNG_ERR_INVALID; | |
1670 | goto end; | |
1671 | } | |
28ab034a | 1672 | tracker = kernel_get_process_attr_tracker(session->kernel_session, process_attr); |
159b042f JG |
1673 | break; |
1674 | case LTTNG_DOMAIN_UST: | |
1675 | if (!session->ust_session) { | |
1676 | ret_code = LTTNG_ERR_INVALID; | |
1677 | goto end; | |
1678 | } | |
28ab034a | 1679 | tracker = trace_ust_get_process_attr_tracker(session->ust_session, process_attr); |
159b042f JG |
1680 | break; |
1681 | default: | |
1682 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1683 | goto end; | |
1684 | } | |
1685 | ||
1686 | if (!tracker) { | |
1687 | ret_code = LTTNG_ERR_INVALID; | |
1688 | goto end; | |
1689 | } | |
1690 | ||
1691 | status = process_attr_tracker_get_inclusion_set(tracker, values); | |
1692 | switch (status) { | |
1693 | case PROCESS_ATTR_TRACKER_STATUS_OK: | |
1694 | ret_code = LTTNG_OK; | |
1695 | break; | |
1696 | case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY: | |
1697 | ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY; | |
1698 | break; | |
1699 | case PROCESS_ATTR_TRACKER_STATUS_ERROR: | |
1700 | ret_code = LTTNG_ERR_NOMEM; | |
1701 | break; | |
1702 | default: | |
1703 | ret_code = LTTNG_ERR_UNK; | |
1704 | break; | |
1705 | } | |
1706 | ||
1707 | end: | |
1708 | return ret_code; | |
1709 | } | |
1710 | ||
2f77fc4b DG |
1711 | /* |
1712 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1713 | */ | |
8ddd72ef | 1714 | int cmd_disable_event(struct command_ctx *cmd_ctx, |
d9a970b7 | 1715 | ltt_session::locked_ref& locked_session, |
28ab034a JG |
1716 | struct lttng_event *event, |
1717 | char *filter_expression, | |
1718 | struct lttng_bytecode *bytecode, | |
1719 | struct lttng_event_exclusion *exclusion) | |
2f77fc4b DG |
1720 | { |
1721 | int ret; | |
a0a4f314 | 1722 | const ltt_session& session = *locked_session; |
df4f5a87 | 1723 | const char *event_name; |
8ddd72ef JR |
1724 | const char *channel_name = cmd_ctx->lsm.u.disable.channel_name; |
1725 | const enum lttng_domain_type domain = cmd_ctx->lsm.domain.type; | |
6e911cad | 1726 | |
18a720cd MD |
1727 | DBG("Disable event command for event \'%s\'", event->name); |
1728 | ||
8ddd72ef JR |
1729 | /* |
1730 | * Filter and exclusions are simply not handled by the | |
1731 | * disable event command at this time. | |
1732 | * | |
1733 | * FIXME | |
1734 | */ | |
1735 | (void) filter_expression; | |
1736 | (void) exclusion; | |
1737 | ||
1738 | /* Ignore the presence of filter or exclusion for the event */ | |
1739 | event->filter = 0; | |
1740 | event->exclusion = 0; | |
1741 | ||
6e911cad MD |
1742 | event_name = event->name; |
1743 | ||
07c4863f | 1744 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 1745 | |
9b7431cf | 1746 | /* Error out on unhandled search criteria */ |
28ab034a JG |
1747 | if (event->loglevel_type || event->loglevel != -1 || event->enabled || event->pid || |
1748 | event->filter || event->exclusion) { | |
7076b56e JG |
1749 | ret = LTTNG_ERR_UNK; |
1750 | goto error; | |
6e911cad | 1751 | } |
2f77fc4b DG |
1752 | |
1753 | switch (domain) { | |
1754 | case LTTNG_DOMAIN_KERNEL: | |
1755 | { | |
1756 | struct ltt_kernel_channel *kchan; | |
1757 | struct ltt_kernel_session *ksess; | |
1758 | ||
d9a970b7 | 1759 | ksess = session.kernel_session; |
2f77fc4b | 1760 | |
85076754 MD |
1761 | /* |
1762 | * If a non-default channel has been created in the | |
1763 | * session, explicitely require that -c chan_name needs | |
1764 | * to be provided. | |
1765 | */ | |
1766 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1767 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1768 | goto error_unlock; |
85076754 MD |
1769 | } |
1770 | ||
2f77fc4b | 1771 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
cd9adb8b | 1772 | if (kchan == nullptr) { |
f73fabfd | 1773 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1774 | goto error_unlock; |
2f77fc4b DG |
1775 | } |
1776 | ||
6e911cad MD |
1777 | switch (event->type) { |
1778 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1779 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1780 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1781 | case LTTNG_EVENT_PROBE: |
1782 | case LTTNG_EVENT_FUNCTION: | |
28ab034a | 1783 | case LTTNG_EVENT_FUNCTION_ENTRY: /* fall-through */ |
9550ee81 | 1784 | if (event_name[0] == '\0') { |
cd9adb8b | 1785 | ret = event_kernel_disable_event(kchan, nullptr, event->type); |
29c62722 | 1786 | } else { |
28ab034a | 1787 | ret = event_kernel_disable_event(kchan, event_name, event->type); |
29c62722 | 1788 | } |
6e911cad | 1789 | if (ret != LTTNG_OK) { |
7076b56e | 1790 | goto error_unlock; |
6e911cad MD |
1791 | } |
1792 | break; | |
6e911cad MD |
1793 | default: |
1794 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1795 | goto error_unlock; |
2f77fc4b DG |
1796 | } |
1797 | ||
7d268848 | 1798 | kernel_wait_quiescent(); |
2f77fc4b DG |
1799 | break; |
1800 | } | |
1801 | case LTTNG_DOMAIN_UST: | |
1802 | { | |
1803 | struct ltt_ust_channel *uchan; | |
1804 | struct ltt_ust_session *usess; | |
1805 | ||
d9a970b7 | 1806 | usess = session.ust_session; |
2f77fc4b | 1807 | |
7076b56e JG |
1808 | if (validate_ust_event_name(event_name)) { |
1809 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1810 | goto error_unlock; | |
1811 | } | |
1812 | ||
85076754 MD |
1813 | /* |
1814 | * If a non-default channel has been created in the | |
9550ee81 | 1815 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1816 | * to be provided. |
1817 | */ | |
1818 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1819 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1820 | goto error_unlock; |
85076754 MD |
1821 | } |
1822 | ||
28ab034a | 1823 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, channel_name); |
cd9adb8b | 1824 | if (uchan == nullptr) { |
f73fabfd | 1825 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1826 | goto error_unlock; |
2f77fc4b DG |
1827 | } |
1828 | ||
6e911cad MD |
1829 | switch (event->type) { |
1830 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1831 | /* |
1832 | * An empty event name means that everything | |
1833 | * should be disabled. | |
1834 | */ | |
1835 | if (event->name[0] == '\0') { | |
1836 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 | 1837 | } else { |
28ab034a | 1838 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
77d536b2 | 1839 | } |
6e911cad | 1840 | if (ret != LTTNG_OK) { |
7076b56e | 1841 | goto error_unlock; |
6e911cad MD |
1842 | } |
1843 | break; | |
1844 | default: | |
1845 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1846 | goto error_unlock; |
2f77fc4b DG |
1847 | } |
1848 | ||
28ab034a | 1849 | DBG3("Disable UST event %s in channel %s completed", event_name, channel_name); |
2f77fc4b DG |
1850 | break; |
1851 | } | |
5cdb6027 | 1852 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1853 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1854 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1855 | { |
fefd409b | 1856 | struct agent *agt; |
d9a970b7 | 1857 | struct ltt_ust_session *usess = session.ust_session; |
f20baf8e | 1858 | |
a0377dfe | 1859 | LTTNG_ASSERT(usess); |
f20baf8e | 1860 | |
6e911cad MD |
1861 | switch (event->type) { |
1862 | case LTTNG_EVENT_ALL: | |
1863 | break; | |
1864 | default: | |
1865 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1866 | goto error_unlock; |
6e911cad MD |
1867 | } |
1868 | ||
5cdb6027 | 1869 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1870 | if (!agt) { |
1871 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1872 | goto error_unlock; |
fefd409b | 1873 | } |
b3639870 JR |
1874 | /* |
1875 | * An empty event name means that everything | |
1876 | * should be disabled. | |
1877 | */ | |
1878 | if (event->name[0] == '\0') { | |
18a720cd MD |
1879 | ret = event_agent_disable_all(usess, agt); |
1880 | } else { | |
1881 | ret = event_agent_disable(usess, agt, event_name); | |
1882 | } | |
f20baf8e | 1883 | if (ret != LTTNG_OK) { |
7076b56e | 1884 | goto error_unlock; |
f20baf8e DG |
1885 | } |
1886 | ||
1887 | break; | |
1888 | } | |
2f77fc4b | 1889 | default: |
f73fabfd | 1890 | ret = LTTNG_ERR_UND; |
7076b56e | 1891 | goto error_unlock; |
2f77fc4b DG |
1892 | } |
1893 | ||
f73fabfd | 1894 | ret = LTTNG_OK; |
2f77fc4b | 1895 | |
7076b56e | 1896 | error_unlock: |
7076b56e | 1897 | error: |
8ddd72ef JR |
1898 | free(exclusion); |
1899 | free(bytecode); | |
1900 | free(filter_expression); | |
2f77fc4b DG |
1901 | return ret; |
1902 | } | |
1903 | ||
2f77fc4b DG |
1904 | /* |
1905 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1906 | */ | |
26e1c61f | 1907 | int cmd_add_context(struct command_ctx *cmd_ctx, |
d9a970b7 | 1908 | ltt_session::locked_ref& locked_session, |
28ab034a JG |
1909 | const struct lttng_event_context *event_context, |
1910 | int kwpipe) | |
2f77fc4b | 1911 | { |
d5979e4a | 1912 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
26e1c61f | 1913 | const enum lttng_domain_type domain = cmd_ctx->lsm.domain.type; |
a0a4f314 | 1914 | const struct ltt_session& session = *locked_session; |
26e1c61f | 1915 | const char *channel_name = cmd_ctx->lsm.u.context.channel_name; |
bdf64013 | 1916 | |
9a699f7b JR |
1917 | /* |
1918 | * Don't try to add a context if the session has been started at | |
1919 | * some point in time before. The tracer does not allow it and would | |
1920 | * result in a corrupted trace. | |
1921 | */ | |
d9a970b7 | 1922 | if (session.has_been_started) { |
9a699f7b JR |
1923 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1924 | goto end; | |
1925 | } | |
1926 | ||
2f77fc4b DG |
1927 | switch (domain) { |
1928 | case LTTNG_DOMAIN_KERNEL: | |
d9a970b7 | 1929 | LTTNG_ASSERT(session.kernel_session); |
979e618e | 1930 | |
d9a970b7 | 1931 | if (session.kernel_session->channel_count == 0) { |
979e618e | 1932 | /* Create default channel */ |
d9a970b7 | 1933 | ret = channel_kernel_create(session.kernel_session, nullptr, kwpipe); |
979e618e DG |
1934 | if (ret != LTTNG_OK) { |
1935 | goto error; | |
1936 | } | |
d5979e4a | 1937 | chan_kern_created = 1; |
979e618e | 1938 | } |
2f77fc4b | 1939 | /* Add kernel context to kernel tracer */ |
d9a970b7 | 1940 | ret = context_kernel_add(session.kernel_session, event_context, channel_name); |
f73fabfd | 1941 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1942 | goto error; |
1943 | } | |
1944 | break; | |
bdf64013 JG |
1945 | case LTTNG_DOMAIN_JUL: |
1946 | case LTTNG_DOMAIN_LOG4J: | |
1947 | { | |
1948 | /* | |
1949 | * Validate channel name. | |
1950 | * If no channel name is given and the domain is JUL or LOG4J, | |
1951 | * set it to the appropriate domain-specific channel name. If | |
1952 | * a name is provided but does not match the expexted channel | |
1953 | * name, return an error. | |
1954 | */ | |
1955 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
5c7248cd | 1956 | strcmp(channel_name, DEFAULT_JUL_CHANNEL_NAME) != 0) { |
bdf64013 JG |
1957 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
1958 | goto error; | |
1959 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
5c7248cd | 1960 | strcmp(channel_name, DEFAULT_LOG4J_CHANNEL_NAME) != 0) { |
bdf64013 JG |
1961 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
1962 | goto error; | |
1963 | } | |
1964 | } | |
30eb3927 | 1965 | /* fall through */ |
2f77fc4b DG |
1966 | case LTTNG_DOMAIN_UST: |
1967 | { | |
d9a970b7 | 1968 | struct ltt_ust_session *usess = session.ust_session; |
85076754 MD |
1969 | unsigned int chan_count; |
1970 | ||
a0377dfe | 1971 | LTTNG_ASSERT(usess); |
2f77fc4b | 1972 | |
85076754 | 1973 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1974 | if (chan_count == 0) { |
1975 | struct lttng_channel *attr; | |
1976 | /* Create default channel */ | |
0a9c6494 | 1977 | attr = channel_new_default_attr(domain, usess->buffer_type); |
cd9adb8b | 1978 | if (attr == nullptr) { |
979e618e DG |
1979 | ret = LTTNG_ERR_FATAL; |
1980 | goto error; | |
1981 | } | |
1982 | ||
7972aab2 | 1983 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1984 | if (ret != LTTNG_OK) { |
1985 | free(attr); | |
1986 | goto error; | |
1987 | } | |
cf0bcb51 | 1988 | channel_attr_destroy(attr); |
d5979e4a | 1989 | chan_ust_created = 1; |
979e618e DG |
1990 | } |
1991 | ||
28ab034a | 1992 | ret = context_ust_add(usess, domain, event_context, channel_name); |
f73fabfd | 1993 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1994 | goto error; |
1995 | } | |
1996 | break; | |
1997 | } | |
2f77fc4b | 1998 | default: |
f73fabfd | 1999 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2000 | goto error; |
2001 | } | |
2002 | ||
bdf64013 JG |
2003 | ret = LTTNG_OK; |
2004 | goto end; | |
2f77fc4b DG |
2005 | |
2006 | error: | |
d5979e4a | 2007 | if (chan_kern_created) { |
28ab034a | 2008 | struct ltt_kernel_channel *kchan = trace_kernel_get_channel_by_name( |
d9a970b7 | 2009 | DEFAULT_CHANNEL_NAME, session.kernel_session); |
d5979e4a | 2010 | /* Created previously, this should NOT fail. */ |
a0377dfe | 2011 | LTTNG_ASSERT(kchan); |
d5979e4a DG |
2012 | kernel_destroy_channel(kchan); |
2013 | } | |
2014 | ||
2015 | if (chan_ust_created) { | |
28ab034a | 2016 | struct ltt_ust_channel *uchan = trace_ust_find_channel_by_name( |
d9a970b7 | 2017 | session.ust_session->domain_global.channels, DEFAULT_CHANNEL_NAME); |
d5979e4a | 2018 | /* Created previously, this should NOT fail. */ |
a0377dfe | 2019 | LTTNG_ASSERT(uchan); |
d5979e4a | 2020 | /* Remove from the channel list of the session. */ |
d9a970b7 | 2021 | trace_ust_delete_channel(session.ust_session->domain_global.channels, uchan); |
d5979e4a DG |
2022 | trace_ust_destroy_channel(uchan); |
2023 | } | |
bdf64013 | 2024 | end: |
2f77fc4b DG |
2025 | return ret; |
2026 | } | |
2027 | ||
dac8e046 JG |
2028 | static inline bool name_starts_with(const char *name, const char *prefix) |
2029 | { | |
7966af57 | 2030 | const size_t max_cmp_len = std::min(strlen(prefix), (size_t) LTTNG_SYMBOL_NAME_LEN); |
dac8e046 JG |
2031 | |
2032 | return !strncmp(name, prefix, max_cmp_len); | |
2033 | } | |
2034 | ||
2035 | /* Perform userspace-specific event name validation */ | |
2036 | static int validate_ust_event_name(const char *name) | |
2037 | { | |
2038 | int ret = 0; | |
2039 | ||
2040 | if (!name) { | |
2041 | ret = -1; | |
2042 | goto end; | |
2043 | } | |
2044 | ||
2045 | /* | |
2046 | * Check name against all internal UST event component namespaces used | |
2047 | * by the agents. | |
2048 | */ | |
2049 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
28ab034a JG |
2050 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || |
2051 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
dac8e046 JG |
2052 | ret = -1; |
2053 | } | |
2054 | ||
2055 | end: | |
2056 | return ret; | |
2057 | } | |
88f06f15 | 2058 | |
2f77fc4b | 2059 | /* |
88f06f15 JG |
2060 | * Internal version of cmd_enable_event() with a supplemental |
2061 | * "internal_event" flag which is used to enable internal events which should | |
2062 | * be hidden from clients. Such events are used in the agent implementation to | |
2063 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 2064 | */ |
d9a970b7 | 2065 | static int _cmd_enable_event(ltt_session::locked_ref& locked_session, |
28ab034a JG |
2066 | const struct lttng_domain *domain, |
2067 | char *channel_name, | |
2068 | struct lttng_event *event, | |
2069 | char *filter_expression, | |
2070 | struct lttng_bytecode *filter, | |
2071 | struct lttng_event_exclusion *exclusion, | |
2072 | int wpipe, | |
2073 | bool internal_event) | |
2f77fc4b | 2074 | { |
9f449915 | 2075 | int ret = 0, channel_created = 0; |
cd9adb8b | 2076 | struct lttng_channel *attr = nullptr; |
07c4863f | 2077 | const ltt_session& session = *locked_session; |
2f77fc4b | 2078 | |
a0377dfe FD |
2079 | LTTNG_ASSERT(event); |
2080 | LTTNG_ASSERT(channel_name); | |
2f77fc4b | 2081 | |
2a385866 | 2082 | /* If we have a filter, we must have its filter expression */ |
a0377dfe | 2083 | LTTNG_ASSERT(!(!!filter_expression ^ !!filter)); |
2a385866 | 2084 | |
9f449915 PP |
2085 | /* Normalize event name as a globbing pattern */ |
2086 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 2087 | |
9f449915 PP |
2088 | /* Normalize exclusion names as globbing patterns */ |
2089 | if (exclusion) { | |
2090 | size_t i; | |
f5ac4bd7 | 2091 | |
9f449915 PP |
2092 | for (i = 0; i < exclusion->count; i++) { |
2093 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
2094 | ||
2095 | strutils_normalize_star_glob_pattern(name); | |
2096 | } | |
930a2e99 JG |
2097 | } |
2098 | ||
07c4863f | 2099 | const lttng::urcu::read_lock_guard read_lock; |
9f449915 | 2100 | |
7972aab2 | 2101 | switch (domain->type) { |
2f77fc4b DG |
2102 | case LTTNG_DOMAIN_KERNEL: |
2103 | { | |
2104 | struct ltt_kernel_channel *kchan; | |
2105 | ||
85076754 MD |
2106 | /* |
2107 | * If a non-default channel has been created in the | |
2108 | * session, explicitely require that -c chan_name needs | |
2109 | * to be provided. | |
2110 | */ | |
d9a970b7 | 2111 | if (session.kernel_session->has_non_default_channel && channel_name[0] == '\0') { |
85076754 MD |
2112 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; |
2113 | goto error; | |
2114 | } | |
2115 | ||
d9a970b7 | 2116 | kchan = trace_kernel_get_channel_by_name(channel_name, session.kernel_session); |
cd9adb8b | 2117 | if (kchan == nullptr) { |
28ab034a | 2118 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, LTTNG_BUFFER_GLOBAL); |
cd9adb8b | 2119 | if (attr == nullptr) { |
f73fabfd | 2120 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2121 | goto error; |
2122 | } | |
28ab034a | 2123 | if (lttng_strncpy(attr->name, channel_name, sizeof(attr->name))) { |
04c17253 | 2124 | ret = LTTNG_ERR_INVALID; |
04c17253 MD |
2125 | goto error; |
2126 | } | |
2f77fc4b | 2127 | |
d9a970b7 | 2128 | ret = cmd_enable_channel_internal(locked_session, domain, attr, wpipe); |
f73fabfd | 2129 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2130 | goto error; |
2131 | } | |
e5f5db7f | 2132 | channel_created = 1; |
2f77fc4b DG |
2133 | } |
2134 | ||
2135 | /* Get the newly created kernel channel pointer */ | |
d9a970b7 | 2136 | kchan = trace_kernel_get_channel_by_name(channel_name, session.kernel_session); |
cd9adb8b | 2137 | if (kchan == nullptr) { |
2f77fc4b | 2138 | /* This sould not happen... */ |
f73fabfd | 2139 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2140 | goto error; |
2141 | } | |
2142 | ||
6e911cad MD |
2143 | switch (event->type) { |
2144 | case LTTNG_EVENT_ALL: | |
29c62722 | 2145 | { |
cd9adb8b JG |
2146 | char *filter_expression_a = nullptr; |
2147 | struct lttng_bytecode *filter_a = nullptr; | |
00a62084 MD |
2148 | |
2149 | /* | |
2150 | * We need to duplicate filter_expression and filter, | |
2151 | * because ownership is passed to first enable | |
2152 | * event. | |
2153 | */ | |
2154 | if (filter_expression) { | |
2155 | filter_expression_a = strdup(filter_expression); | |
2156 | if (!filter_expression_a) { | |
2157 | ret = LTTNG_ERR_FATAL; | |
2158 | goto error; | |
2159 | } | |
2160 | } | |
2161 | if (filter) { | |
64803277 | 2162 | filter_a = zmalloc<lttng_bytecode>(sizeof(*filter_a) + filter->len); |
00a62084 MD |
2163 | if (!filter_a) { |
2164 | free(filter_expression_a); | |
2165 | ret = LTTNG_ERR_FATAL; | |
2166 | goto error; | |
2167 | } | |
2168 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
2169 | } | |
28ab034a JG |
2170 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
2171 | ret = event_kernel_enable_event(kchan, event, filter_expression, filter); | |
a969e101 | 2172 | /* We have passed ownership */ |
cd9adb8b JG |
2173 | filter_expression = nullptr; |
2174 | filter = nullptr; | |
29c62722 MD |
2175 | if (ret != LTTNG_OK) { |
2176 | if (channel_created) { | |
2177 | /* Let's not leak a useless channel. */ | |
2178 | kernel_destroy_channel(kchan); | |
2179 | } | |
00a62084 MD |
2180 | free(filter_expression_a); |
2181 | free(filter_a); | |
29c62722 MD |
2182 | goto error; |
2183 | } | |
28ab034a JG |
2184 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ |
2185 | ret = event_kernel_enable_event( | |
2186 | kchan, event, filter_expression_a, filter_a); | |
60d21fa2 | 2187 | /* We have passed ownership */ |
cd9adb8b JG |
2188 | filter_expression_a = nullptr; |
2189 | filter_a = nullptr; | |
29c62722 MD |
2190 | if (ret != LTTNG_OK) { |
2191 | goto error; | |
2192 | } | |
2193 | break; | |
2194 | } | |
6e6ef3d7 | 2195 | case LTTNG_EVENT_PROBE: |
dcabc190 | 2196 | case LTTNG_EVENT_USERSPACE_PROBE: |
6e6ef3d7 DG |
2197 | case LTTNG_EVENT_FUNCTION: |
2198 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 2199 | case LTTNG_EVENT_TRACEPOINT: |
28ab034a | 2200 | ret = event_kernel_enable_event(kchan, event, filter_expression, filter); |
a969e101 | 2201 | /* We have passed ownership */ |
cd9adb8b JG |
2202 | filter_expression = nullptr; |
2203 | filter = nullptr; | |
6e911cad MD |
2204 | if (ret != LTTNG_OK) { |
2205 | if (channel_created) { | |
2206 | /* Let's not leak a useless channel. */ | |
2207 | kernel_destroy_channel(kchan); | |
2208 | } | |
2209 | goto error; | |
e5f5db7f | 2210 | } |
6e911cad MD |
2211 | break; |
2212 | case LTTNG_EVENT_SYSCALL: | |
28ab034a | 2213 | ret = event_kernel_enable_event(kchan, event, filter_expression, filter); |
a969e101 | 2214 | /* We have passed ownership */ |
cd9adb8b JG |
2215 | filter_expression = nullptr; |
2216 | filter = nullptr; | |
e2b957af MD |
2217 | if (ret != LTTNG_OK) { |
2218 | goto error; | |
2219 | } | |
6e911cad MD |
2220 | break; |
2221 | default: | |
2222 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
2223 | goto error; |
2224 | } | |
2225 | ||
7d268848 | 2226 | kernel_wait_quiescent(); |
2f77fc4b DG |
2227 | break; |
2228 | } | |
2229 | case LTTNG_DOMAIN_UST: | |
2230 | { | |
2231 | struct ltt_ust_channel *uchan; | |
d9a970b7 | 2232 | struct ltt_ust_session *usess = session.ust_session; |
2f77fc4b | 2233 | |
a0377dfe | 2234 | LTTNG_ASSERT(usess); |
2f77fc4b | 2235 | |
85076754 MD |
2236 | /* |
2237 | * If a non-default channel has been created in the | |
2238 | * session, explicitely require that -c chan_name needs | |
2239 | * to be provided. | |
2240 | */ | |
2241 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
2242 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2243 | goto error; | |
2244 | } | |
2245 | ||
2f77fc4b | 2246 | /* Get channel from global UST domain */ |
28ab034a | 2247 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, channel_name); |
cd9adb8b | 2248 | if (uchan == nullptr) { |
2f77fc4b | 2249 | /* Create default channel */ |
28ab034a | 2250 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, usess->buffer_type); |
cd9adb8b | 2251 | if (attr == nullptr) { |
f73fabfd | 2252 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2253 | goto error; |
2254 | } | |
28ab034a | 2255 | if (lttng_strncpy(attr->name, channel_name, sizeof(attr->name))) { |
04c17253 | 2256 | ret = LTTNG_ERR_INVALID; |
04c17253 MD |
2257 | goto error; |
2258 | } | |
2f77fc4b | 2259 | |
d9a970b7 | 2260 | ret = cmd_enable_channel_internal(locked_session, domain, attr, wpipe); |
f73fabfd | 2261 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2262 | goto error; |
2263 | } | |
2f77fc4b DG |
2264 | |
2265 | /* Get the newly created channel reference back */ | |
28ab034a JG |
2266 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2267 | channel_name); | |
a0377dfe | 2268 | LTTNG_ASSERT(uchan); |
2f77fc4b DG |
2269 | } |
2270 | ||
141feb8c JG |
2271 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2272 | /* | |
2273 | * Don't allow users to add UST events to channels which | |
2274 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2275 | * Python, etc.). | |
2276 | */ | |
2277 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2278 | goto error; | |
2279 | } | |
2280 | ||
dac8e046 JG |
2281 | if (!internal_event) { |
2282 | /* | |
2283 | * Ensure the event name is not reserved for internal | |
2284 | * use. | |
2285 | */ | |
2286 | ret = validate_ust_event_name(event->name); | |
2287 | if (ret) { | |
28ab034a | 2288 | WARN("Userspace event name %s failed validation.", event->name); |
dac8e046 JG |
2289 | ret = LTTNG_ERR_INVALID_EVENT_NAME; |
2290 | goto error; | |
2291 | } | |
2292 | } | |
2293 | ||
2f77fc4b | 2294 | /* At this point, the session and channel exist on the tracer */ |
28ab034a JG |
2295 | ret = event_ust_enable_tracepoint( |
2296 | usess, uchan, event, filter_expression, filter, exclusion, internal_event); | |
49d21f93 | 2297 | /* We have passed ownership */ |
cd9adb8b JG |
2298 | filter_expression = nullptr; |
2299 | filter = nullptr; | |
2300 | exclusion = nullptr; | |
94382e15 JG |
2301 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2302 | goto already_enabled; | |
2303 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2304 | goto error; |
2305 | } | |
2306 | break; | |
2307 | } | |
5cdb6027 | 2308 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2309 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2310 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2311 | { |
da6c3a50 | 2312 | const char *default_event_name, *default_chan_name; |
fefd409b | 2313 | struct agent *agt; |
f20baf8e DG |
2314 | struct lttng_event uevent; |
2315 | struct lttng_domain tmp_dom; | |
d9a970b7 | 2316 | struct ltt_ust_session *usess = session.ust_session; |
f20baf8e | 2317 | |
a0377dfe | 2318 | LTTNG_ASSERT(usess); |
f20baf8e | 2319 | |
f28f9e44 JG |
2320 | if (!agent_tracing_is_enabled()) { |
2321 | DBG("Attempted to enable an event in an agent domain but the agent thread is not running"); | |
2322 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
2323 | goto error; | |
2324 | } | |
2325 | ||
5cdb6027 | 2326 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2327 | if (!agt) { |
5cdb6027 | 2328 | agt = agent_create(domain->type); |
fefd409b | 2329 | if (!agt) { |
e5b3c48c | 2330 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2331 | goto error; |
2332 | } | |
2333 | agent_add(agt, usess->agents); | |
2334 | } | |
2335 | ||
022d91ba | 2336 | /* Create the default tracepoint. */ |
996de3c7 | 2337 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2338 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2339 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
dcd24bbf | 2340 | uevent.loglevel = -1; |
28ab034a | 2341 | default_event_name = event_get_default_agent_ust_name(domain->type); |
da6c3a50 | 2342 | if (!default_event_name) { |
e5b3c48c | 2343 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2344 | goto error; |
f43f95a9 | 2345 | } |
da6c3a50 | 2346 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2347 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2348 | ||
2349 | /* | |
2350 | * The domain type is changed because we are about to enable the | |
2351 | * default channel and event for the JUL domain that are hardcoded. | |
2352 | * This happens in the UST domain. | |
2353 | */ | |
2354 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2355 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2356 | ||
0e115563 DG |
2357 | switch (domain->type) { |
2358 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2359 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2360 | break; |
2361 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2362 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2363 | break; |
2364 | case LTTNG_DOMAIN_PYTHON: | |
2365 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2366 | break; | |
2367 | default: | |
e98a44b0 | 2368 | /* The switch/case we are in makes this impossible */ |
a0377dfe | 2369 | abort(); |
da6c3a50 DG |
2370 | } |
2371 | ||
971da06a | 2372 | { |
cd9adb8b JG |
2373 | char *filter_expression_copy = nullptr; |
2374 | struct lttng_bytecode *filter_copy = nullptr; | |
971da06a JG |
2375 | |
2376 | if (filter) { | |
28ab034a JG |
2377 | const size_t filter_size = |
2378 | sizeof(struct lttng_bytecode) + filter->len; | |
51755dc8 | 2379 | |
64803277 | 2380 | filter_copy = zmalloc<lttng_bytecode>(filter_size); |
971da06a | 2381 | if (!filter_copy) { |
018096a4 | 2382 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2383 | goto error; |
971da06a | 2384 | } |
51755dc8 | 2385 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2386 | |
28ab034a | 2387 | filter_expression_copy = strdup(filter_expression); |
8404118c JG |
2388 | if (!filter_expression) { |
2389 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2390 | } |
2391 | ||
2392 | if (!filter_expression_copy || !filter_copy) { | |
2393 | free(filter_expression_copy); | |
2394 | free(filter_copy); | |
2395 | goto error; | |
8404118c | 2396 | } |
971da06a JG |
2397 | } |
2398 | ||
d9a970b7 | 2399 | ret = cmd_enable_event_internal(locked_session, |
28ab034a JG |
2400 | &tmp_dom, |
2401 | (char *) default_chan_name, | |
2402 | &uevent, | |
2403 | filter_expression_copy, | |
2404 | filter_copy, | |
cd9adb8b | 2405 | nullptr, |
28ab034a | 2406 | wpipe); |
971da06a JG |
2407 | } |
2408 | ||
94382e15 JG |
2409 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2410 | goto already_enabled; | |
2411 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2412 | goto error; |
2413 | } | |
2414 | ||
2415 | /* The wild card * means that everything should be enabled. */ | |
2416 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
28ab034a | 2417 | ret = event_agent_enable_all(usess, agt, event, filter, filter_expression); |
f20baf8e | 2418 | } else { |
28ab034a | 2419 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e | 2420 | } |
cd9adb8b JG |
2421 | filter = nullptr; |
2422 | filter_expression = nullptr; | |
f20baf8e DG |
2423 | if (ret != LTTNG_OK) { |
2424 | goto error; | |
2425 | } | |
2426 | ||
2427 | break; | |
2428 | } | |
2f77fc4b | 2429 | default: |
f73fabfd | 2430 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2431 | goto error; |
2432 | } | |
2433 | ||
f73fabfd | 2434 | ret = LTTNG_OK; |
2f77fc4b | 2435 | |
94382e15 | 2436 | already_enabled: |
2f77fc4b | 2437 | error: |
49d21f93 MD |
2438 | free(filter_expression); |
2439 | free(filter); | |
2440 | free(exclusion); | |
cf0bcb51 | 2441 | channel_attr_destroy(attr); |
2f77fc4b DG |
2442 | return ret; |
2443 | } | |
2444 | ||
88f06f15 JG |
2445 | /* |
2446 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2447 | * We own filter, exclusion, and filter_expression. | |
2448 | */ | |
8ddd72ef | 2449 | int cmd_enable_event(struct command_ctx *cmd_ctx, |
d9a970b7 | 2450 | ltt_session::locked_ref& locked_session, |
28ab034a JG |
2451 | struct lttng_event *event, |
2452 | char *filter_expression, | |
2453 | struct lttng_event_exclusion *exclusion, | |
2454 | struct lttng_bytecode *bytecode, | |
2455 | int wpipe) | |
88f06f15 | 2456 | { |
8ddd72ef JR |
2457 | int ret; |
2458 | /* | |
2459 | * Copied to ensure proper alignment since 'lsm' is a packed structure. | |
2460 | */ | |
2461 | const lttng_domain command_domain = cmd_ctx->lsm.domain; | |
2462 | ||
2463 | /* | |
2464 | * The ownership of the following parameters is transferred to | |
2465 | * _cmd_enable_event: | |
2466 | * | |
2467 | * - filter_expression, | |
2468 | * - bytecode, | |
2469 | * - exclusion | |
2470 | */ | |
d9a970b7 | 2471 | ret = _cmd_enable_event(locked_session, |
28ab034a JG |
2472 | &command_domain, |
2473 | cmd_ctx->lsm.u.enable.channel_name, | |
2474 | event, | |
2475 | filter_expression, | |
2476 | bytecode, | |
2477 | exclusion, | |
2478 | wpipe, | |
2479 | false); | |
cd9adb8b JG |
2480 | filter_expression = nullptr; |
2481 | bytecode = nullptr; | |
2482 | exclusion = nullptr; | |
8ddd72ef | 2483 | return ret; |
88f06f15 JG |
2484 | } |
2485 | ||
2486 | /* | |
2487 | * Enable an event which is internal to LTTng. An internal should | |
2488 | * never be made visible to clients and are immune to checks such as | |
2489 | * reserved names. | |
2490 | */ | |
d9a970b7 | 2491 | static int cmd_enable_event_internal(ltt_session::locked_ref& locked_session, |
28ab034a JG |
2492 | const struct lttng_domain *domain, |
2493 | char *channel_name, | |
2494 | struct lttng_event *event, | |
2495 | char *filter_expression, | |
2496 | struct lttng_bytecode *filter, | |
2497 | struct lttng_event_exclusion *exclusion, | |
2498 | int wpipe) | |
88f06f15 | 2499 | { |
d9a970b7 | 2500 | return _cmd_enable_event(locked_session, |
28ab034a JG |
2501 | domain, |
2502 | channel_name, | |
2503 | event, | |
2504 | filter_expression, | |
2505 | filter, | |
2506 | exclusion, | |
2507 | wpipe, | |
2508 | true); | |
88f06f15 JG |
2509 | } |
2510 | ||
2f77fc4b DG |
2511 | /* |
2512 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2513 | */ | |
8ddd72ef | 2514 | enum lttng_error_code cmd_list_tracepoints(enum lttng_domain_type domain, |
28ab034a | 2515 | struct lttng_payload *reply_payload) |
2f77fc4b | 2516 | { |
8ddd72ef | 2517 | enum lttng_error_code ret_code; |
2f77fc4b | 2518 | int ret; |
8ddd72ef | 2519 | ssize_t i, nb_events = 0; |
cd9adb8b | 2520 | struct lttng_event *events = nullptr; |
8ddd72ef JR |
2521 | struct lttcomm_list_command_header reply_command_header = {}; |
2522 | size_t reply_command_header_offset; | |
2523 | ||
2524 | assert(reply_payload); | |
2525 | ||
2526 | /* Reserve space for command reply header. */ | |
2527 | reply_command_header_offset = reply_payload->buffer.size; | |
2528 | ret = lttng_dynamic_buffer_set_size(&reply_payload->buffer, | |
28ab034a JG |
2529 | reply_command_header_offset + |
2530 | sizeof(struct lttcomm_list_command_header)); | |
8ddd72ef JR |
2531 | if (ret) { |
2532 | ret_code = LTTNG_ERR_NOMEM; | |
2533 | goto error; | |
2534 | } | |
2f77fc4b DG |
2535 | |
2536 | switch (domain) { | |
2537 | case LTTNG_DOMAIN_KERNEL: | |
8ddd72ef | 2538 | nb_events = kernel_list_events(&events); |
2f77fc4b | 2539 | if (nb_events < 0) { |
8ddd72ef | 2540 | ret_code = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2541 | goto error; |
2542 | } | |
2543 | break; | |
2544 | case LTTNG_DOMAIN_UST: | |
8ddd72ef | 2545 | nb_events = ust_app_list_events(&events); |
2f77fc4b | 2546 | if (nb_events < 0) { |
8ddd72ef | 2547 | ret_code = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2548 | goto error; |
2549 | } | |
2550 | break; | |
5cdb6027 | 2551 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2552 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2553 | case LTTNG_DOMAIN_PYTHON: |
8ddd72ef | 2554 | nb_events = agent_list_events(&events, domain); |
3c6a091f | 2555 | if (nb_events < 0) { |
8ddd72ef | 2556 | ret_code = LTTNG_ERR_UST_LIST_FAIL; |
3c6a091f DG |
2557 | goto error; |
2558 | } | |
2559 | break; | |
2f77fc4b | 2560 | default: |
8ddd72ef JR |
2561 | ret_code = LTTNG_ERR_UND; |
2562 | goto error; | |
2563 | } | |
2564 | ||
2565 | for (i = 0; i < nb_events; i++) { | |
cd9adb8b JG |
2566 | ret = lttng_event_serialize( |
2567 | &events[i], 0, nullptr, nullptr, 0, nullptr, reply_payload); | |
8ddd72ef JR |
2568 | if (ret) { |
2569 | ret_code = LTTNG_ERR_NOMEM; | |
2570 | goto error; | |
2571 | } | |
2572 | } | |
2573 | ||
2574 | if (nb_events > UINT32_MAX) { | |
2575 | ERR("Tracepoint count would overflow the tracepoint listing command's reply"); | |
2576 | ret_code = LTTNG_ERR_OVERFLOW; | |
2f77fc4b DG |
2577 | goto error; |
2578 | } | |
2579 | ||
8ddd72ef JR |
2580 | /* Update command reply header. */ |
2581 | reply_command_header.count = (uint32_t) nb_events; | |
28ab034a JG |
2582 | memcpy(reply_payload->buffer.data + reply_command_header_offset, |
2583 | &reply_command_header, | |
2584 | sizeof(reply_command_header)); | |
2f77fc4b | 2585 | |
8ddd72ef | 2586 | ret_code = LTTNG_OK; |
2f77fc4b | 2587 | error: |
8ddd72ef JR |
2588 | free(events); |
2589 | return ret_code; | |
2f77fc4b DG |
2590 | } |
2591 | ||
2592 | /* | |
2593 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2594 | */ | |
b2d68839 | 2595 | enum lttng_error_code cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
28ab034a | 2596 | struct lttng_payload *reply) |
2f77fc4b | 2597 | { |
b2d68839 | 2598 | enum lttng_error_code ret_code; |
2f77fc4b | 2599 | int ret; |
b2d68839 | 2600 | unsigned int i, nb_fields; |
cd9adb8b | 2601 | struct lttng_event_field *fields = nullptr; |
b2d68839 JR |
2602 | struct lttcomm_list_command_header reply_command_header = {}; |
2603 | size_t reply_command_header_offset; | |
2604 | ||
2605 | assert(reply); | |
2606 | ||
2607 | /* Reserve space for command reply header. */ | |
2608 | reply_command_header_offset = reply->buffer.size; | |
2609 | ret = lttng_dynamic_buffer_set_size(&reply->buffer, | |
28ab034a JG |
2610 | reply_command_header_offset + |
2611 | sizeof(struct lttcomm_list_command_header)); | |
b2d68839 JR |
2612 | if (ret) { |
2613 | ret_code = LTTNG_ERR_NOMEM; | |
2614 | goto error; | |
2615 | } | |
2f77fc4b DG |
2616 | |
2617 | switch (domain) { | |
2618 | case LTTNG_DOMAIN_UST: | |
b2d68839 JR |
2619 | ret = ust_app_list_event_fields(&fields); |
2620 | if (ret < 0) { | |
2621 | ret_code = LTTNG_ERR_UST_LIST_FAIL; | |
2f77fc4b DG |
2622 | goto error; |
2623 | } | |
b2d68839 | 2624 | |
2f77fc4b DG |
2625 | break; |
2626 | case LTTNG_DOMAIN_KERNEL: | |
28ab034a | 2627 | default: /* fall-through */ |
b2d68839 | 2628 | ret_code = LTTNG_ERR_UND; |
2f77fc4b DG |
2629 | goto error; |
2630 | } | |
2631 | ||
b2d68839 JR |
2632 | nb_fields = ret; |
2633 | ||
2634 | for (i = 0; i < nb_fields; i++) { | |
2635 | ret = lttng_event_field_serialize(&fields[i], reply); | |
2636 | if (ret) { | |
2637 | ret_code = LTTNG_ERR_NOMEM; | |
2638 | goto error; | |
2639 | } | |
2640 | } | |
2641 | ||
2642 | if (nb_fields > UINT32_MAX) { | |
2643 | ERR("Tracepoint field count would overflow the tracepoint field listing command's reply"); | |
2644 | ret_code = LTTNG_ERR_OVERFLOW; | |
2645 | goto error; | |
2646 | } | |
2647 | ||
2648 | /* Update command reply header. */ | |
2649 | reply_command_header.count = (uint32_t) nb_fields; | |
2650 | ||
28ab034a JG |
2651 | memcpy(reply->buffer.data + reply_command_header_offset, |
2652 | &reply_command_header, | |
2653 | sizeof(reply_command_header)); | |
b2d68839 JR |
2654 | |
2655 | ret_code = LTTNG_OK; | |
2f77fc4b DG |
2656 | |
2657 | error: | |
b2d68839 JR |
2658 | free(fields); |
2659 | return ret_code; | |
2f77fc4b DG |
2660 | } |
2661 | ||
28ab034a | 2662 | enum lttng_error_code cmd_list_syscalls(struct lttng_payload *reply_payload) |
834978fd | 2663 | { |
8ddd72ef JR |
2664 | enum lttng_error_code ret_code; |
2665 | ssize_t nb_events, i; | |
2666 | int ret; | |
cd9adb8b | 2667 | struct lttng_event *events = nullptr; |
8ddd72ef JR |
2668 | struct lttcomm_list_command_header reply_command_header = {}; |
2669 | size_t reply_command_header_offset; | |
2670 | ||
2671 | assert(reply_payload); | |
2672 | ||
2673 | /* Reserve space for command reply header. */ | |
2674 | reply_command_header_offset = reply_payload->buffer.size; | |
2675 | ret = lttng_dynamic_buffer_set_size(&reply_payload->buffer, | |
28ab034a JG |
2676 | reply_command_header_offset + |
2677 | sizeof(struct lttcomm_list_command_header)); | |
8ddd72ef JR |
2678 | if (ret) { |
2679 | ret_code = LTTNG_ERR_NOMEM; | |
2680 | goto end; | |
2681 | } | |
2682 | ||
2683 | nb_events = syscall_table_list(&events); | |
2684 | if (nb_events < 0) { | |
28ab034a | 2685 | ret_code = (enum lttng_error_code) - nb_events; |
8ddd72ef JR |
2686 | goto end; |
2687 | } | |
2688 | ||
2689 | for (i = 0; i < nb_events; i++) { | |
cd9adb8b JG |
2690 | ret = lttng_event_serialize( |
2691 | &events[i], 0, nullptr, nullptr, 0, nullptr, reply_payload); | |
8ddd72ef JR |
2692 | if (ret) { |
2693 | ret_code = LTTNG_ERR_NOMEM; | |
2694 | goto end; | |
2695 | } | |
2696 | } | |
2697 | ||
2698 | if (nb_events > UINT32_MAX) { | |
2699 | ERR("Syscall count would overflow the syscall listing command's reply"); | |
2700 | ret_code = LTTNG_ERR_OVERFLOW; | |
2701 | goto end; | |
2702 | } | |
2703 | ||
2704 | /* Update command reply header. */ | |
2705 | reply_command_header.count = (uint32_t) nb_events; | |
28ab034a JG |
2706 | memcpy(reply_payload->buffer.data + reply_command_header_offset, |
2707 | &reply_command_header, | |
2708 | sizeof(reply_command_header)); | |
8ddd72ef JR |
2709 | |
2710 | ret_code = LTTNG_OK; | |
2711 | end: | |
2712 | free(events); | |
2713 | return ret_code; | |
834978fd DG |
2714 | } |
2715 | ||
2f77fc4b DG |
2716 | /* |
2717 | * Command LTTNG_START_TRACE processed by the client thread. | |
2718 | */ | |
a0a4f314 | 2719 | int cmd_start_trace(const ltt_session::locked_ref& session) |
2f77fc4b | 2720 | { |
82b69413 | 2721 | enum lttng_error_code ret; |
cde3e505 | 2722 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2723 | struct ltt_kernel_session *ksession; |
2724 | struct ltt_ust_session *usess; | |
28ab034a JG |
2725 | const bool session_rotated_after_last_stop = session->rotated_after_last_stop; |
2726 | const bool session_cleared_after_last_stop = session->cleared_after_last_stop; | |
2f77fc4b | 2727 | |
2f77fc4b DG |
2728 | /* Ease our life a bit ;) */ |
2729 | ksession = session->kernel_session; | |
2730 | usess = session->ust_session; | |
2731 | ||
8382cf6f DG |
2732 | /* Is the session already started? */ |
2733 | if (session->active) { | |
f73fabfd | 2734 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
7a24ece3 JR |
2735 | /* Perform nothing */ |
2736 | goto end; | |
2f77fc4b DG |
2737 | } |
2738 | ||
1f496244 | 2739 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING && |
28ab034a | 2740 | !session->current_trace_chunk) { |
1f496244 JG |
2741 | /* |
2742 | * A rotation was launched while the session was stopped and | |
2743 | * it has not been completed yet. It is not possible to start | |
2744 | * the session since starting the session here would require a | |
2745 | * rotation from "NULL" to a new trace chunk. That rotation | |
2746 | * would overlap with the ongoing rotation, which is not | |
2747 | * supported. | |
2748 | */ | |
2749 | WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing", | |
28ab034a | 2750 | session->name); |
1f496244 JG |
2751 | ret = LTTNG_ERR_ROTATION_PENDING; |
2752 | goto error; | |
2753 | } | |
2754 | ||
cde3e505 DG |
2755 | /* |
2756 | * Starting a session without channel is useless since after that it's not | |
2757 | * possible to enable channel thus inform the client. | |
2758 | */ | |
2759 | if (usess && usess->domain_global.channels) { | |
2760 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2761 | } | |
2762 | if (ksession) { | |
2763 | nb_chan += ksession->channel_count; | |
2764 | } | |
2765 | if (!nb_chan) { | |
2766 | ret = LTTNG_ERR_NO_CHANNEL; | |
2767 | goto error; | |
2768 | } | |
2769 | ||
66cefebd | 2770 | session->active = true; |
1f496244 | 2771 | session->rotated_after_last_stop = false; |
b02f5986 | 2772 | session->cleared_after_last_stop = false; |
070b6a86 | 2773 | if (session->output_traces && !session->current_trace_chunk) { |
1f496244 JG |
2774 | if (!session->has_been_started) { |
2775 | struct lttng_trace_chunk *trace_chunk; | |
2776 | ||
28ab034a | 2777 | DBG("Creating initial trace chunk of session \"%s\"", session->name); |
cd9adb8b JG |
2778 | trace_chunk = |
2779 | session_create_new_trace_chunk(session, nullptr, nullptr, nullptr); | |
1f496244 JG |
2780 | if (!trace_chunk) { |
2781 | ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
2782 | goto error; | |
2783 | } | |
a0377dfe | 2784 | LTTNG_ASSERT(!session->current_trace_chunk); |
28ab034a | 2785 | ret = (lttng_error_code) session_set_trace_chunk( |
cd9adb8b | 2786 | session, trace_chunk, nullptr); |
1f496244 JG |
2787 | lttng_trace_chunk_put(trace_chunk); |
2788 | if (ret) { | |
2789 | ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
2790 | goto error; | |
2791 | } | |
2792 | } else { | |
2793 | DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk", | |
28ab034a | 2794 | session->name); |
1f496244 JG |
2795 | /* |
2796 | * Rotate existing streams into the new chunk. | |
2797 | * This is a "quiet" rotation has no client has | |
2798 | * explicitly requested this operation. | |
2799 | * | |
2800 | * There is also no need to wait for the rotation | |
2801 | * to complete as it will happen immediately. No data | |
2802 | * was produced as the session was stopped, so the | |
2803 | * rotation should happen on reception of the command. | |
2804 | */ | |
28ab034a | 2805 | ret = (lttng_error_code) cmd_rotate_session( |
cd9adb8b | 2806 | session, nullptr, true, LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); |
1f496244 JG |
2807 | if (ret != LTTNG_OK) { |
2808 | goto error; | |
2809 | } | |
5c408ad8 | 2810 | } |
c996624c JD |
2811 | } |
2812 | ||
2f77fc4b | 2813 | /* Kernel tracing */ |
cd9adb8b | 2814 | if (ksession != nullptr) { |
c996624c | 2815 | DBG("Start kernel tracing session %s", session->name); |
7966af57 | 2816 | ret = (lttng_error_code) start_kernel_session(ksession); |
9b6c7ec5 | 2817 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2818 | goto error; |
2819 | } | |
2f77fc4b DG |
2820 | } |
2821 | ||
2822 | /* Flag session that trace should start automatically */ | |
2823 | if (usess) { | |
07c4863f | 2824 | const int int_ret = ust_app_start_trace_all(usess); |
82b69413 JG |
2825 | |
2826 | if (int_ret < 0) { | |
f73fabfd | 2827 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2828 | goto error; |
2829 | } | |
2830 | } | |
2831 | ||
04ed9e10 JG |
2832 | /* |
2833 | * Open a packet in every stream of the session to ensure that viewers | |
2834 | * can correctly identify the boundaries of the periods during which | |
2835 | * tracing was active for this session. | |
2836 | */ | |
2837 | ret = session_open_packets(session); | |
2838 | if (ret != LTTNG_OK) { | |
2839 | goto error; | |
2840 | } | |
2841 | ||
5c408ad8 JD |
2842 | /* |
2843 | * Clear the flag that indicates that a rotation was done while the | |
2844 | * session was stopped. | |
2845 | */ | |
2846 | session->rotated_after_last_stop = false; | |
2847 | ||
355cf1bd | 2848 | if (session->rotate_timer_period && !session->rotation_schedule_timer_enabled) { |
07c4863f | 2849 | const int int_ret = timer_session_rotation_schedule_timer_start( |
28ab034a | 2850 | session, session->rotate_timer_period); |
82b69413 JG |
2851 | |
2852 | if (int_ret < 0) { | |
259c2674 JD |
2853 | ERR("Failed to enable rotate timer"); |
2854 | ret = LTTNG_ERR_UNK; | |
2855 | goto error; | |
2856 | } | |
2857 | } | |
2858 | ||
f73fabfd | 2859 | ret = LTTNG_OK; |
2f77fc4b DG |
2860 | |
2861 | error: | |
1f496244 JG |
2862 | if (ret == LTTNG_OK) { |
2863 | /* Flag this after a successful start. */ | |
66cefebd | 2864 | session->has_been_started = true; |
1f496244 | 2865 | } else { |
66cefebd | 2866 | session->active = false; |
1f496244 | 2867 | /* Restore initial state on error. */ |
28ab034a JG |
2868 | session->rotated_after_last_stop = session_rotated_after_last_stop; |
2869 | session->cleared_after_last_stop = session_cleared_after_last_stop; | |
1f496244 | 2870 | } |
7a24ece3 | 2871 | end: |
2f77fc4b DG |
2872 | return ret; |
2873 | } | |
2874 | ||
2875 | /* | |
2876 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2877 | */ | |
a0a4f314 | 2878 | int cmd_stop_trace(const ltt_session::locked_ref& session) |
2f77fc4b DG |
2879 | { |
2880 | int ret; | |
2f77fc4b DG |
2881 | struct ltt_kernel_session *ksession; |
2882 | struct ltt_ust_session *usess; | |
2883 | ||
4dbe1875 | 2884 | DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
2f77fc4b DG |
2885 | /* Short cut */ |
2886 | ksession = session->kernel_session; | |
2887 | usess = session->ust_session; | |
2888 | ||
40afd77d | 2889 | /* Session is not active. Skip everything and inform the client. */ |
8382cf6f | 2890 | if (!session->active) { |
f73fabfd | 2891 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2892 | goto error; |
2893 | } | |
2894 | ||
4dbe1875 MD |
2895 | ret = stop_kernel_session(ksession); |
2896 | if (ret != LTTNG_OK) { | |
2897 | goto error; | |
2f77fc4b DG |
2898 | } |
2899 | ||
14fb1ebe | 2900 | if (usess && usess->active) { |
2f77fc4b DG |
2901 | ret = ust_app_stop_trace_all(usess); |
2902 | if (ret < 0) { | |
f73fabfd | 2903 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2904 | goto error; |
2905 | } | |
2906 | } | |
2907 | ||
28ab034a | 2908 | DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
8382cf6f | 2909 | /* Flag inactive after a successful stop. */ |
66cefebd | 2910 | session->active = false; |
4dbe1875 | 2911 | ret = LTTNG_OK; |
2f77fc4b DG |
2912 | |
2913 | error: | |
2914 | return ret; | |
2915 | } | |
2916 | ||
2917 | /* | |
433f5ba9 JR |
2918 | * Set the base_path of the session only if subdir of a control uris is set. |
2919 | * Return LTTNG_OK on success, otherwise LTTNG_ERR_*. | |
2f77fc4b | 2920 | */ |
a0a4f314 JG |
2921 | static int set_session_base_path_from_uris(const ltt_session::locked_ref& session, |
2922 | size_t nb_uri, | |
2923 | struct lttng_uri *uris) | |
2f77fc4b | 2924 | { |
433f5ba9 JR |
2925 | int ret; |
2926 | size_t i; | |
2f77fc4b | 2927 | |
e3876bf0 | 2928 | for (i = 0; i < nb_uri; i++) { |
28ab034a | 2929 | if (uris[i].stype != LTTNG_STREAM_CONTROL || uris[i].subdir[0] == '\0') { |
e3876bf0 JR |
2930 | /* Not interested in these URIs */ |
2931 | continue; | |
2932 | } | |
2933 | ||
cd9adb8b | 2934 | if (session->base_path != nullptr) { |
e3876bf0 | 2935 | free(session->base_path); |
cd9adb8b | 2936 | session->base_path = nullptr; |
e3876bf0 JR |
2937 | } |
2938 | ||
2939 | /* Set session base_path */ | |
2940 | session->base_path = strdup(uris[i].subdir); | |
2941 | if (!session->base_path) { | |
433f5ba9 | 2942 | PERROR("Failed to copy base path \"%s\" to session \"%s\"", |
28ab034a JG |
2943 | uris[i].subdir, |
2944 | session->name); | |
433f5ba9 | 2945 | ret = LTTNG_ERR_NOMEM; |
e3876bf0 JR |
2946 | goto error; |
2947 | } | |
433f5ba9 | 2948 | DBG2("Setting base path \"%s\" for session \"%s\"", |
28ab034a JG |
2949 | session->base_path, |
2950 | session->name); | |
433f5ba9 JR |
2951 | } |
2952 | ret = LTTNG_OK; | |
2953 | error: | |
2954 | return ret; | |
2955 | } | |
2956 | ||
2957 | /* | |
2958 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2959 | */ | |
a0a4f314 JG |
2960 | int cmd_set_consumer_uri(const ltt_session::locked_ref& session, |
2961 | size_t nb_uri, | |
2962 | struct lttng_uri *uris) | |
433f5ba9 JR |
2963 | { |
2964 | int ret, i; | |
2965 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2966 | struct ltt_ust_session *usess = session->ust_session; | |
2967 | ||
a0377dfe FD |
2968 | LTTNG_ASSERT(uris); |
2969 | LTTNG_ASSERT(nb_uri > 0); | |
433f5ba9 JR |
2970 | |
2971 | /* Can't set consumer URI if the session is active. */ | |
2972 | if (session->active) { | |
2973 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2974 | goto error; | |
2975 | } | |
2976 | ||
2977 | /* | |
2978 | * Set the session base path if any. This is done inside | |
2979 | * cmd_set_consumer_uri to preserve backward compatibility of the | |
2980 | * previous session creation api vs the session descriptor api. | |
2981 | */ | |
2982 | ret = set_session_base_path_from_uris(session, nb_uri, uris); | |
2983 | if (ret != LTTNG_OK) { | |
2984 | goto error; | |
e3876bf0 JR |
2985 | } |
2986 | ||
bda32d56 | 2987 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2988 | for (i = 0; i < nb_uri; i++) { |
28ab034a | 2989 | ret = add_uri_to_consumer(session, session->consumer, &uris[i], LTTNG_DOMAIN_NONE); |
a74934ba | 2990 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2991 | goto error; |
2992 | } | |
2f77fc4b DG |
2993 | } |
2994 | ||
bda32d56 JG |
2995 | /* Set UST session URIs */ |
2996 | if (session->ust_session) { | |
2997 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2998 | ret = add_uri_to_consumer(session, |
28ab034a JG |
2999 | session->ust_session->consumer, |
3000 | &uris[i], | |
3001 | LTTNG_DOMAIN_UST); | |
bda32d56 JG |
3002 | if (ret != LTTNG_OK) { |
3003 | goto error; | |
3004 | } | |
3005 | } | |
3006 | } | |
3007 | ||
3008 | /* Set kernel session URIs */ | |
3009 | if (session->kernel_session) { | |
3010 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 3011 | ret = add_uri_to_consumer(session, |
28ab034a JG |
3012 | session->kernel_session->consumer, |
3013 | &uris[i], | |
3014 | LTTNG_DOMAIN_KERNEL); | |
bda32d56 JG |
3015 | if (ret != LTTNG_OK) { |
3016 | goto error; | |
3017 | } | |
3018 | } | |
3019 | } | |
3020 | ||
7ab70fe0 DG |
3021 | /* |
3022 | * Make sure to set the session in output mode after we set URI since a | |
3023 | * session can be created without URL (thus flagged in no output mode). | |
3024 | */ | |
3025 | session->output_traces = 1; | |
3026 | if (ksess) { | |
3027 | ksess->output_traces = 1; | |
bda32d56 JG |
3028 | } |
3029 | ||
3030 | if (usess) { | |
7ab70fe0 DG |
3031 | usess->output_traces = 1; |
3032 | } | |
3033 | ||
2f77fc4b | 3034 | /* All good! */ |
f73fabfd | 3035 | ret = LTTNG_OK; |
2f77fc4b DG |
3036 | |
3037 | error: | |
3038 | return ret; | |
3039 | } | |
3040 | ||
28ab034a | 3041 | static enum lttng_error_code |
a0a4f314 | 3042 | set_session_output_from_descriptor(const ltt_session::locked_ref& session, |
28ab034a | 3043 | const struct lttng_session_descriptor *descriptor) |
2f77fc4b DG |
3044 | { |
3045 | int ret; | |
b178f53e | 3046 | enum lttng_error_code ret_code = LTTNG_OK; |
07c4863f | 3047 | const lttng_session_descriptor_type session_type = |
28ab034a | 3048 | lttng_session_descriptor_get_type(descriptor); |
07c4863f | 3049 | const lttng_session_descriptor_output_type output_type = |
28ab034a | 3050 | lttng_session_descriptor_get_output_type(descriptor); |
b178f53e JG |
3051 | struct lttng_uri uris[2] = {}; |
3052 | size_t uri_count = 0; | |
3053 | ||
3054 | switch (output_type) { | |
3055 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: | |
3056 | goto end; | |
3057 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: | |
28ab034a | 3058 | lttng_session_descriptor_get_local_output_uri(descriptor, &uris[0]); |
b178f53e JG |
3059 | uri_count = 1; |
3060 | break; | |
3061 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: | |
28ab034a | 3062 | lttng_session_descriptor_get_network_output_uris(descriptor, &uris[0], &uris[1]); |
b178f53e JG |
3063 | uri_count = 2; |
3064 | break; | |
3065 | default: | |
3066 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3067 | goto end; |
2f77fc4b DG |
3068 | } |
3069 | ||
b178f53e JG |
3070 | switch (session_type) { |
3071 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3072 | { | |
cd9adb8b | 3073 | struct snapshot_output *new_output = nullptr; |
b178f53e JG |
3074 | |
3075 | new_output = snapshot_output_alloc(); | |
3076 | if (!new_output) { | |
3077 | ret_code = LTTNG_ERR_NOMEM; | |
3078 | goto end; | |
3079 | } | |
3080 | ||
3081 | ret = snapshot_output_init_with_uri(session, | |
28ab034a | 3082 | DEFAULT_SNAPSHOT_MAX_SIZE, |
cd9adb8b | 3083 | nullptr, |
28ab034a JG |
3084 | uris, |
3085 | uri_count, | |
3086 | session->consumer, | |
3087 | new_output, | |
3088 | &session->snapshot); | |
b178f53e | 3089 | if (ret < 0) { |
28ab034a | 3090 | ret_code = (ret == -ENOMEM) ? LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID; |
b178f53e JG |
3091 | snapshot_output_destroy(new_output); |
3092 | goto end; | |
3093 | } | |
3094 | snapshot_add_output(&session->snapshot, new_output); | |
3095 | break; | |
3096 | } | |
3097 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: | |
3098 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3099 | { | |
7966af57 | 3100 | ret_code = (lttng_error_code) cmd_set_consumer_uri(session, uri_count, uris); |
b178f53e JG |
3101 | break; |
3102 | } | |
3103 | default: | |
3104 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3105 | goto end; |
2f77fc4b | 3106 | } |
b178f53e JG |
3107 | end: |
3108 | return ret_code; | |
3109 | } | |
3110 | ||
28ab034a JG |
3111 | static enum lttng_error_code |
3112 | cmd_create_session_from_descriptor(struct lttng_session_descriptor *descriptor, | |
3113 | const lttng_sock_cred *creds, | |
3114 | const char *home_path) | |
b178f53e JG |
3115 | { |
3116 | int ret; | |
3117 | enum lttng_error_code ret_code; | |
3118 | const char *session_name; | |
cd9adb8b | 3119 | struct ltt_session *new_session = nullptr; |
b178f53e | 3120 | enum lttng_session_descriptor_status descriptor_status; |
2f77fc4b | 3121 | |
d9a970b7 | 3122 | const auto list_lock = lttng::sessiond::lock_session_list(); |
b178f53e JG |
3123 | if (home_path) { |
3124 | if (*home_path != '/') { | |
3125 | ERR("Home path provided by client is not absolute"); | |
3126 | ret_code = LTTNG_ERR_INVALID; | |
3127 | goto end; | |
3128 | } | |
3129 | } | |
2f77fc4b | 3130 | |
28ab034a | 3131 | descriptor_status = lttng_session_descriptor_get_session_name(descriptor, &session_name); |
b178f53e JG |
3132 | switch (descriptor_status) { |
3133 | case LTTNG_SESSION_DESCRIPTOR_STATUS_OK: | |
3134 | break; | |
3135 | case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET: | |
cd9adb8b | 3136 | session_name = nullptr; |
b178f53e JG |
3137 | break; |
3138 | default: | |
3139 | ret_code = LTTNG_ERR_INVALID; | |
3140 | goto end; | |
3141 | } | |
e3876bf0 | 3142 | |
28ab034a | 3143 | ret_code = session_create(session_name, creds->uid, creds->gid, &new_session); |
b178f53e | 3144 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3145 | goto end; |
2f77fc4b DG |
3146 | } |
3147 | ||
139a8d25 | 3148 | ret_code = notification_thread_command_add_session(the_notification_thread_handle, |
28ab034a JG |
3149 | new_session->id, |
3150 | new_session->name, | |
3151 | new_session->uid, | |
3152 | new_session->gid); | |
139a8d25 JG |
3153 | if (ret_code != LTTNG_OK) { |
3154 | goto end; | |
3155 | } | |
3156 | ||
3157 | /* Announce the session's destruction to the notification thread when it is destroyed. */ | |
3158 | ret = session_add_destroy_notifier( | |
a0a4f314 JG |
3159 | [new_session]() { |
3160 | session_get(new_session); | |
3161 | new_session->lock(); | |
16d64977 | 3162 | return ltt_session::make_locked_ref(*new_session); |
a0a4f314 JG |
3163 | }(), |
3164 | [](const ltt_session::locked_ref& session, | |
3165 | void *user_data __attribute__((unused))) { | |
28ab034a JG |
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 | |
a0a4f314 JG |
3215 | ret_code = set_session_output_from_descriptor( |
3216 | [new_session]() { | |
3217 | session_get(new_session); | |
3218 | new_session->lock(); | |
16d64977 | 3219 | return ltt_session::make_locked_ref(*new_session); |
a0a4f314 JG |
3220 | }(), |
3221 | descriptor); | |
b178f53e JG |
3222 | if (ret_code != LTTNG_OK) { |
3223 | goto end; | |
3224 | } | |
66cefebd | 3225 | new_session->consumer->enabled = true; |
b178f53e | 3226 | ret_code = LTTNG_OK; |
e32d7f27 | 3227 | end: |
b178f53e JG |
3228 | /* Release reference provided by the session_create function. */ |
3229 | session_put(new_session); | |
3230 | if (ret_code != LTTNG_OK && new_session) { | |
3231 | /* Release the global reference on error. */ | |
3232 | session_destroy(new_session); | |
e32d7f27 | 3233 | } |
d9a970b7 | 3234 | |
b178f53e | 3235 | return ret_code; |
2f77fc4b DG |
3236 | } |
3237 | ||
28ab034a JG |
3238 | enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, |
3239 | int sock, | |
3240 | struct lttng_session_descriptor **return_descriptor) | |
27babd3a DG |
3241 | { |
3242 | int ret; | |
b178f53e JG |
3243 | size_t payload_size; |
3244 | struct lttng_dynamic_buffer payload; | |
3245 | struct lttng_buffer_view home_dir_view; | |
3246 | struct lttng_buffer_view session_descriptor_view; | |
cd9adb8b | 3247 | struct lttng_session_descriptor *session_descriptor = nullptr; |
b178f53e JG |
3248 | enum lttng_error_code ret_code; |
3249 | ||
3250 | lttng_dynamic_buffer_init(&payload); | |
28ab034a | 3251 | if (cmd_ctx->lsm.u.create_session.home_dir_size >= LTTNG_PATH_MAX) { |
b178f53e JG |
3252 | ret_code = LTTNG_ERR_INVALID; |
3253 | goto error; | |
27babd3a | 3254 | } |
3a91de3a | 3255 | if (cmd_ctx->lsm.u.create_session.session_descriptor_size > |
28ab034a | 3256 | LTTNG_SESSION_DESCRIPTOR_MAX_LEN) { |
b178f53e JG |
3257 | ret_code = LTTNG_ERR_INVALID; |
3258 | goto error; | |
27babd3a DG |
3259 | } |
3260 | ||
3a91de3a | 3261 | payload_size = cmd_ctx->lsm.u.create_session.home_dir_size + |
28ab034a | 3262 | cmd_ctx->lsm.u.create_session.session_descriptor_size; |
b178f53e JG |
3263 | ret = lttng_dynamic_buffer_set_size(&payload, payload_size); |
3264 | if (ret) { | |
3265 | ret_code = LTTNG_ERR_NOMEM; | |
3266 | goto error; | |
27babd3a DG |
3267 | } |
3268 | ||
b178f53e JG |
3269 | ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size); |
3270 | if (ret <= 0) { | |
3271 | ERR("Reception of session descriptor failed, aborting."); | |
3272 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3273 | goto error; | |
27babd3a DG |
3274 | } |
3275 | ||
b178f53e | 3276 | home_dir_view = lttng_buffer_view_from_dynamic_buffer( |
28ab034a | 3277 | &payload, 0, cmd_ctx->lsm.u.create_session.home_dir_size); |
3e6e0df2 | 3278 | if (cmd_ctx->lsm.u.create_session.home_dir_size > 0 && |
28ab034a | 3279 | !lttng_buffer_view_is_valid(&home_dir_view)) { |
3e6e0df2 JG |
3280 | ERR("Invalid payload in \"create session\" command: buffer too short to contain home directory"); |
3281 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3282 | goto error; | |
3283 | } | |
3284 | ||
b178f53e | 3285 | session_descriptor_view = lttng_buffer_view_from_dynamic_buffer( |
28ab034a JG |
3286 | &payload, |
3287 | cmd_ctx->lsm.u.create_session.home_dir_size, | |
3288 | cmd_ctx->lsm.u.create_session.session_descriptor_size); | |
3e6e0df2 JG |
3289 | if (!lttng_buffer_view_is_valid(&session_descriptor_view)) { |
3290 | ERR("Invalid payload in \"create session\" command: buffer too short to contain session descriptor"); | |
3291 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3292 | goto error; | |
3293 | } | |
27babd3a | 3294 | |
28ab034a JG |
3295 | ret = lttng_session_descriptor_create_from_buffer(&session_descriptor_view, |
3296 | &session_descriptor); | |
b178f53e JG |
3297 | if (ret < 0) { |
3298 | ERR("Failed to create session descriptor from payload of \"create session\" command"); | |
3299 | ret_code = LTTNG_ERR_INVALID; | |
3300 | goto error; | |
3301 | } | |
27babd3a | 3302 | |
b178f53e JG |
3303 | /* |
3304 | * Sets the descriptor's auto-generated properties (name, output) if | |
3305 | * needed. | |
3306 | */ | |
cd9adb8b JG |
3307 | ret_code = cmd_create_session_from_descriptor(session_descriptor, |
3308 | &cmd_ctx->creds, | |
3309 | home_dir_view.size ? home_dir_view.data : | |
3310 | nullptr); | |
b178f53e JG |
3311 | if (ret_code != LTTNG_OK) { |
3312 | goto error; | |
e32d7f27 | 3313 | } |
b178f53e JG |
3314 | |
3315 | ret_code = LTTNG_OK; | |
3316 | *return_descriptor = session_descriptor; | |
cd9adb8b | 3317 | session_descriptor = nullptr; |
b178f53e JG |
3318 | error: |
3319 | lttng_dynamic_buffer_reset(&payload); | |
3320 | lttng_session_descriptor_destroy(session_descriptor); | |
3321 | return ret_code; | |
27babd3a DG |
3322 | } |
3323 | ||
a0a4f314 | 3324 | static void cmd_destroy_session_reply(const ltt_session::locked_ref& session, void *_reply_context) |
3e3665b8 JG |
3325 | { |
3326 | int ret; | |
3327 | ssize_t comm_ret; | |
3328 | const struct cmd_destroy_session_reply_context *reply_context = | |
28ab034a | 3329 | (cmd_destroy_session_reply_context *) _reply_context; |
3e3665b8 JG |
3330 | struct lttng_dynamic_buffer payload; |
3331 | struct lttcomm_session_destroy_command_header cmd_header; | |
cd9adb8b | 3332 | struct lttng_trace_archive_location *location = nullptr; |
3e3665b8 | 3333 | struct lttcomm_lttng_msg llm = { |
37a5ef39 | 3334 | .cmd_type = LTTCOMM_SESSIOND_COMMAND_DESTROY_SESSION, |
3285a971 | 3335 | .ret_code = reply_context->destruction_status, |
3e3665b8 | 3336 | .pid = UINT32_MAX, |
28ab034a | 3337 | .cmd_header_size = sizeof(struct lttcomm_session_destroy_command_header), |
3e3665b8 | 3338 | .data_size = 0, |
1c9a0b0e | 3339 | .fd_count = 0, |
3e3665b8 JG |
3340 | }; |
3341 | size_t payload_size_before_location; | |
3342 | ||
3343 | lttng_dynamic_buffer_init(&payload); | |
3344 | ||
3345 | ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm)); | |
0e270a1e | 3346 | if (ret) { |
3e3665b8 JG |
3347 | ERR("Failed to append session destruction message"); |
3348 | goto error; | |
0e270a1e | 3349 | } |
3e3665b8 | 3350 | |
28ab034a JG |
3351 | cmd_header.rotation_state = (int32_t) (reply_context->implicit_rotation_on_destroy ? |
3352 | session->rotation_state : | |
3353 | LTTNG_ROTATION_STATE_NO_ROTATION); | |
3354 | ret = lttng_dynamic_buffer_append(&payload, &cmd_header, sizeof(cmd_header)); | |
3e3665b8 JG |
3355 | if (ret) { |
3356 | ERR("Failed to append session destruction command header"); | |
3357 | goto error; | |
3358 | } | |
3359 | ||
3360 | if (!reply_context->implicit_rotation_on_destroy) { | |
3361 | DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply", | |
28ab034a | 3362 | session->name); |
3e3665b8 JG |
3363 | goto send_reply; |
3364 | } | |
3365 | if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) { | |
3366 | DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply", | |
28ab034a | 3367 | session->name); |
3e3665b8 JG |
3368 | goto send_reply; |
3369 | } | |
3370 | ||
3371 | location = session_get_trace_archive_location(session); | |
3372 | if (!location) { | |
3373 | ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"", | |
28ab034a | 3374 | session->name); |
3e3665b8 JG |
3375 | goto error; |
3376 | } | |
3377 | ||
3378 | payload_size_before_location = payload.size; | |
28ab034a | 3379 | comm_ret = lttng_trace_archive_location_serialize(location, &payload); |
d3740619 | 3380 | lttng_trace_archive_location_put(location); |
3e3665b8 JG |
3381 | if (comm_ret < 0) { |
3382 | ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"", | |
28ab034a | 3383 | session->name); |
3e3665b8 JG |
3384 | goto error; |
3385 | } | |
3386 | /* Update the message to indicate the location's length. */ | |
3387 | ((struct lttcomm_lttng_msg *) payload.data)->data_size = | |
28ab034a | 3388 | payload.size - payload_size_before_location; |
3e3665b8 | 3389 | send_reply: |
28ab034a | 3390 | comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd, payload.data, payload.size); |
3e3665b8 JG |
3391 | if (comm_ret != (ssize_t) payload.size) { |
3392 | ERR("Failed to send result of the destruction of session \"%s\" to client", | |
28ab034a | 3393 | session->name); |
3e3665b8 JG |
3394 | } |
3395 | error: | |
3396 | ret = close(reply_context->reply_sock_fd); | |
3397 | if (ret) { | |
3398 | PERROR("Failed to close client socket in deferred session destroy reply"); | |
3399 | } | |
3400 | lttng_dynamic_buffer_reset(&payload); | |
3401 | free(_reply_context); | |
3402 | } | |
3403 | ||
2f77fc4b DG |
3404 | /* |
3405 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
3406 | * |
3407 | * Called with session lock held. | |
2f77fc4b | 3408 | */ |
a0a4f314 | 3409 | int cmd_destroy_session(const ltt_session::locked_ref& session, int *sock_fd) |
2f77fc4b DG |
3410 | { |
3411 | int ret; | |
3285a971 | 3412 | enum lttng_error_code destruction_last_error = LTTNG_OK; |
cd9adb8b | 3413 | struct cmd_destroy_session_reply_context *reply_context = nullptr; |
3e3665b8 JG |
3414 | |
3415 | if (sock_fd) { | |
64803277 | 3416 | reply_context = zmalloc<cmd_destroy_session_reply_context>(); |
3e3665b8 JG |
3417 | if (!reply_context) { |
3418 | ret = LTTNG_ERR_NOMEM; | |
3419 | goto end; | |
3420 | } | |
64803277 | 3421 | |
3e3665b8 JG |
3422 | reply_context->reply_sock_fd = *sock_fd; |
3423 | } | |
2f77fc4b | 3424 | |
28ab034a | 3425 | DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, session->id); |
3e3665b8 JG |
3426 | if (session->active) { |
3427 | DBG("Session \"%s\" is active, attempting to stop it before destroying it", | |
28ab034a | 3428 | session->name); |
3e3665b8 JG |
3429 | ret = cmd_stop_trace(session); |
3430 | if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
3431 | /* Carry on with the destruction of the session. */ | |
3432 | ERR("Failed to stop session \"%s\" as part of its destruction: %s", | |
28ab034a JG |
3433 | session->name, |
3434 | lttng_strerror(-ret)); | |
7966af57 | 3435 | destruction_last_error = (lttng_error_code) ret; |
3e3665b8 JG |
3436 | } |
3437 | } | |
5c408ad8 | 3438 | |
92816cc3 | 3439 | if (session->rotation_schedule_timer_enabled) { |
28ab034a | 3440 | if (timer_session_rotation_schedule_timer_stop(session)) { |
92816cc3 | 3441 | ERR("Failed to stop the \"rotation schedule\" timer of session %s", |
28ab034a | 3442 | session->name); |
3285a971 | 3443 | destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR; |
92816cc3 | 3444 | } |
259c2674 JD |
3445 | } |
3446 | ||
90936dcf | 3447 | if (session->rotate_size) { |
0038180d JG |
3448 | try { |
3449 | the_rotation_thread_handle->unsubscribe_session_consumed_size_rotation( | |
3450 | *session); | |
5b9eda8a | 3451 | } catch (const std::exception& e) { |
0038180d JG |
3452 | /* Continue the destruction of the session anyway. */ |
3453 | ERR("Failed to unsubscribe rotation thread notification channel from consumed size condition during session destruction: %s", | |
3454 | e.what()); | |
3455 | } | |
3456 | ||
90936dcf JD |
3457 | session->rotate_size = 0; |
3458 | } | |
3459 | ||
a7ceb342 | 3460 | if (session->rotated && session->current_trace_chunk && session->output_traces) { |
b5893d8e JG |
3461 | /* |
3462 | * Perform a last rotation on destruction if rotations have | |
3463 | * occurred during the session's lifetime. | |
3464 | */ | |
28ab034a | 3465 | ret = cmd_rotate_session( |
cd9adb8b | 3466 | session, nullptr, false, LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); |
d2956687 JG |
3467 | if (ret != LTTNG_OK) { |
3468 | ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s", | |
28ab034a JG |
3469 | session->name, |
3470 | lttng_strerror(-ret)); | |
7966af57 | 3471 | destruction_last_error = (lttng_error_code) -ret; |
124473a3 | 3472 | } |
0e270a1e | 3473 | if (reply_context) { |
3e3665b8 | 3474 | reply_context->implicit_rotation_on_destroy = true; |
0e270a1e JG |
3475 | } |
3476 | } else if (session->has_been_started && session->current_trace_chunk) { | |
7fdbed1c JG |
3477 | /* |
3478 | * The user has not triggered a session rotation. However, to | |
3479 | * ensure all data has been consumed, the session is rotated | |
3480 | * to a 'null' trace chunk before it is destroyed. | |
3481 | * | |
3482 | * This is a "quiet" rotation meaning that no notification is | |
3483 | * emitted and no renaming of the current trace chunk takes | |
3484 | * place. | |
3485 | */ | |
28ab034a | 3486 | ret = cmd_rotate_session( |
cd9adb8b | 3487 | session, nullptr, true, LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); |
53fb6336 JG |
3488 | /* |
3489 | * Rotation operations may not be supported by the kernel | |
3490 | * tracer. Hence, do not consider this implicit rotation as | |
3491 | * a session destruction error. The library has already stopped | |
3492 | * the session and waited for pending data; there is nothing | |
3493 | * left to do but complete the destruction of the session. | |
3494 | */ | |
28ab034a | 3495 | if (ret != LTTNG_OK && ret != -LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) { |
7fdbed1c | 3496 | ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s", |
28ab034a JG |
3497 | session->name, |
3498 | lttng_strerror(ret)); | |
7966af57 | 3499 | destruction_last_error = (lttng_error_code) -ret; |
7fdbed1c JG |
3500 | } |
3501 | } | |
5c408ad8 | 3502 | |
a503e1ef JG |
3503 | if (session->shm_path[0]) { |
3504 | /* | |
3505 | * When a session is created with an explicit shm_path, | |
3506 | * the consumer daemon will create its shared memory files | |
3507 | * at that location and will *not* unlink them. This is normal | |
3508 | * as the intention of that feature is to make it possible | |
3509 | * to retrieve the content of those files should a crash occur. | |
3510 | * | |
3511 | * To ensure the content of those files can be used, the | |
3512 | * sessiond daemon will replicate the content of the metadata | |
3513 | * cache in a metadata file. | |
3514 | * | |
3515 | * On clean-up, it is expected that the consumer daemon will | |
3516 | * unlink the shared memory files and that the session daemon | |
3517 | * will unlink the metadata file. Then, the session's directory | |
3518 | * in the shm path can be removed. | |
3519 | * | |
3520 | * Unfortunately, a flaw in the design of the sessiond's and | |
3521 | * consumerd's tear down of channels makes it impossible to | |
3522 | * determine when the sessiond _and_ the consumerd have both | |
3523 | * destroyed their representation of a channel. For one, the | |
3524 | * unlinking, close, and rmdir happen in deferred 'call_rcu' | |
3525 | * callbacks in both daemons. | |
3526 | * | |
3527 | * However, it is also impossible for the sessiond to know when | |
3528 | * the consumer daemon is done destroying its channel(s) since | |
3529 | * it occurs as a reaction to the closing of the channel's file | |
3530 | * descriptor. There is no resulting communication initiated | |
3531 | * from the consumerd to the sessiond to confirm that the | |
3532 | * operation is completed (and was successful). | |
3533 | * | |
3534 | * Until this is all fixed, the session daemon checks for the | |
3535 | * removal of the session's shm path which makes it possible | |
3536 | * to safely advertise a session as having been destroyed. | |
3537 | * | |
3538 | * Prior to this fix, it was not possible to reliably save | |
3539 | * a session making use of the --shm-path option, destroy it, | |
3540 | * and load it again. This is because the creation of the | |
3541 | * session would fail upon seeing the session's shm path | |
3542 | * already in existence. | |
3543 | * | |
3544 | * Note that none of the error paths in the check for the | |
3545 | * directory's existence return an error. This is normal | |
3546 | * as there isn't much that can be done. The session will | |
3547 | * be destroyed properly, except that we can't offer the | |
3548 | * guarantee that the same session can be re-created. | |
3549 | */ | |
3550 | current_completion_handler = &destroy_completion_handler.handler; | |
3551 | ret = lttng_strncpy(destroy_completion_handler.shm_path, | |
28ab034a JG |
3552 | session->shm_path, |
3553 | sizeof(destroy_completion_handler.shm_path)); | |
a0377dfe | 3554 | LTTNG_ASSERT(!ret); |
a503e1ef | 3555 | } |
e32d7f27 JG |
3556 | |
3557 | /* | |
3558 | * The session is destroyed. However, note that the command context | |
3559 | * still holds a reference to the session, thus delaying its destruction | |
3560 | * _at least_ up to the point when that reference is released. | |
3561 | */ | |
a0a4f314 | 3562 | session_destroy(&session.get()); |
3e3665b8 | 3563 | if (reply_context) { |
3285a971 | 3564 | reply_context->destruction_status = destruction_last_error; |
28ab034a JG |
3565 | ret = session_add_destroy_notifier( |
3566 | session, cmd_destroy_session_reply, (void *) reply_context); | |
3e3665b8 JG |
3567 | if (ret) { |
3568 | ret = LTTNG_ERR_FATAL; | |
3569 | goto end; | |
3570 | } else { | |
3571 | *sock_fd = -1; | |
3572 | } | |
0e270a1e JG |
3573 | } |
3574 | ret = LTTNG_OK; | |
3e3665b8 | 3575 | end: |
2f77fc4b DG |
3576 | return ret; |
3577 | } | |
3578 | ||
2f77fc4b DG |
3579 | /* |
3580 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3581 | */ | |
a0a4f314 | 3582 | int cmd_register_consumer(const ltt_session::locked_ref& session, |
28ab034a JG |
3583 | enum lttng_domain_type domain, |
3584 | const char *sock_path, | |
3585 | struct consumer_data *cdata) | |
2f77fc4b DG |
3586 | { |
3587 | int ret, sock; | |
cd9adb8b | 3588 | struct consumer_socket *socket = nullptr; |
2f77fc4b | 3589 | |
a0377dfe FD |
3590 | LTTNG_ASSERT(cdata); |
3591 | LTTNG_ASSERT(sock_path); | |
2f77fc4b DG |
3592 | |
3593 | switch (domain) { | |
3594 | case LTTNG_DOMAIN_KERNEL: | |
3595 | { | |
3596 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3597 | ||
a0377dfe | 3598 | LTTNG_ASSERT(ksess); |
2f77fc4b DG |
3599 | |
3600 | /* Can't register a consumer if there is already one */ | |
3601 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 3602 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
3603 | goto error; |
3604 | } | |
3605 | ||
3606 | sock = lttcomm_connect_unix_sock(sock_path); | |
3607 | if (sock < 0) { | |
f73fabfd | 3608 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
3609 | goto error; |
3610 | } | |
4ce514c4 | 3611 | cdata->cmd_sock = sock; |
2f77fc4b | 3612 | |
4ce514c4 | 3613 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
cd9adb8b | 3614 | if (socket == nullptr) { |
f66c074c DG |
3615 | ret = close(sock); |
3616 | if (ret < 0) { | |
3617 | PERROR("close register consumer"); | |
3618 | } | |
4ce514c4 | 3619 | cdata->cmd_sock = -1; |
f73fabfd | 3620 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3621 | goto error; |
3622 | } | |
3623 | ||
64803277 | 3624 | socket->lock = zmalloc<pthread_mutex_t>(); |
cd9adb8b | 3625 | if (socket->lock == nullptr) { |
2f77fc4b | 3626 | PERROR("zmalloc pthread mutex"); |
f73fabfd | 3627 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3628 | goto error; |
3629 | } | |
64803277 | 3630 | |
cd9adb8b | 3631 | pthread_mutex_init(socket->lock, nullptr); |
2f77fc4b DG |
3632 | socket->registered = 1; |
3633 | ||
07c4863f | 3634 | const lttng::urcu::read_lock_guard read_lock; |
2f77fc4b | 3635 | consumer_add_socket(socket, ksess->consumer); |
2f77fc4b DG |
3636 | |
3637 | pthread_mutex_lock(&cdata->pid_mutex); | |
3638 | cdata->pid = -1; | |
3639 | pthread_mutex_unlock(&cdata->pid_mutex); | |
3640 | ||
3641 | break; | |
3642 | } | |
3643 | default: | |
3644 | /* TODO: Userspace tracing */ | |
f73fabfd | 3645 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3646 | goto error; |
3647 | } | |
3648 | ||
dd81b457 | 3649 | return LTTNG_OK; |
2f77fc4b DG |
3650 | |
3651 | error: | |
dd81b457 DG |
3652 | if (socket) { |
3653 | consumer_destroy_socket(socket); | |
3654 | } | |
2f77fc4b DG |
3655 | return ret; |
3656 | } | |
3657 | ||
3658 | /* | |
3659 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3660 | */ | |
a0a4f314 | 3661 | ssize_t cmd_list_domains(const ltt_session::locked_ref& session, struct lttng_domain **domains) |
2f77fc4b DG |
3662 | { |
3663 | int ret, index = 0; | |
3664 | ssize_t nb_dom = 0; | |
fefd409b DG |
3665 | struct agent *agt; |
3666 | struct lttng_ht_iter iter; | |
2f77fc4b | 3667 | |
cd9adb8b | 3668 | if (session->kernel_session != nullptr) { |
2f77fc4b DG |
3669 | DBG3("Listing domains found kernel domain"); |
3670 | nb_dom++; | |
3671 | } | |
3672 | ||
cd9adb8b | 3673 | if (session->ust_session != nullptr) { |
2f77fc4b DG |
3674 | DBG3("Listing domains found UST global domain"); |
3675 | nb_dom++; | |
3c6a091f | 3676 | |
07c4863f | 3677 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 3678 | |
28ab034a JG |
3679 | cds_lfht_for_each_entry ( |
3680 | session->ust_session->agents->ht, &iter.iter, agt, node.node) { | |
fefd409b DG |
3681 | if (agt->being_used) { |
3682 | nb_dom++; | |
3683 | } | |
3c6a091f | 3684 | } |
2f77fc4b DG |
3685 | } |
3686 | ||
fa64dfb4 JG |
3687 | if (!nb_dom) { |
3688 | goto end; | |
3689 | } | |
3690 | ||
64803277 | 3691 | *domains = calloc<lttng_domain>(nb_dom); |
cd9adb8b | 3692 | if (*domains == nullptr) { |
f73fabfd | 3693 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3694 | goto error; |
3695 | } | |
3696 | ||
cd9adb8b | 3697 | if (session->kernel_session != nullptr) { |
2f77fc4b | 3698 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; |
b5edb9e8 PP |
3699 | |
3700 | /* Kernel session buffer type is always GLOBAL */ | |
3701 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
3702 | ||
2f77fc4b DG |
3703 | index++; |
3704 | } | |
3705 | ||
cd9adb8b | 3706 | if (session->ust_session != nullptr) { |
2f77fc4b | 3707 | (*domains)[index].type = LTTNG_DOMAIN_UST; |
88c5f0d8 | 3708 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 3709 | index++; |
3c6a091f | 3710 | |
56047f5a | 3711 | { |
07c4863f | 3712 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a JG |
3713 | |
3714 | cds_lfht_for_each_entry ( | |
3715 | session->ust_session->agents->ht, &iter.iter, agt, node.node) { | |
3716 | if (agt->being_used) { | |
3717 | (*domains)[index].type = agt->domain; | |
3718 | (*domains)[index].buf_type = | |
3719 | session->ust_session->buffer_type; | |
3720 | index++; | |
3721 | } | |
fefd409b | 3722 | } |
3c6a091f | 3723 | } |
2f77fc4b | 3724 | } |
fa64dfb4 | 3725 | end: |
2f77fc4b DG |
3726 | return nb_dom; |
3727 | ||
3728 | error: | |
f73fabfd DG |
3729 | /* Return negative value to differentiate return code */ |
3730 | return -ret; | |
2f77fc4b DG |
3731 | } |
3732 | ||
2f77fc4b DG |
3733 | /* |
3734 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3735 | */ | |
999af9c1 | 3736 | enum lttng_error_code cmd_list_channels(enum lttng_domain_type domain, |
a0a4f314 | 3737 | const ltt_session::locked_ref& session, |
28ab034a | 3738 | struct lttng_payload *payload) |
2f77fc4b | 3739 | { |
999af9c1 JR |
3740 | int ret = 0; |
3741 | unsigned int i = 0; | |
3742 | struct lttcomm_list_command_header cmd_header = {}; | |
3743 | size_t cmd_header_offset; | |
3744 | enum lttng_error_code ret_code; | |
3745 | ||
a0a4f314 | 3746 | LTTNG_ASSERT(payload); |
999af9c1 JR |
3747 | |
3748 | DBG("Listing channels for session %s", session->name); | |
3749 | ||
3750 | cmd_header_offset = payload->buffer.size; | |
3751 | ||
3752 | /* Reserve space for command reply header. */ | |
3753 | ret = lttng_dynamic_buffer_set_size(&payload->buffer, | |
28ab034a | 3754 | cmd_header_offset + sizeof(cmd_header)); |
999af9c1 JR |
3755 | if (ret) { |
3756 | ret_code = LTTNG_ERR_NOMEM; | |
3757 | goto end; | |
3758 | } | |
2f77fc4b DG |
3759 | |
3760 | switch (domain) { | |
3761 | case LTTNG_DOMAIN_KERNEL: | |
999af9c1 JR |
3762 | { |
3763 | /* Kernel channels */ | |
3764 | struct ltt_kernel_channel *kchan; | |
cd9adb8b | 3765 | if (session->kernel_session != nullptr) { |
28ab034a JG |
3766 | cds_list_for_each_entry ( |
3767 | kchan, &session->kernel_session->channel_list.head, list) { | |
999af9c1 JR |
3768 | uint64_t discarded_events, lost_packets; |
3769 | struct lttng_channel_extended *extended; | |
3770 | ||
3771 | extended = (struct lttng_channel_extended *) | |
28ab034a | 3772 | kchan->channel->attr.extended.ptr; |
999af9c1 | 3773 | |
28ab034a JG |
3774 | ret = get_kernel_runtime_stats( |
3775 | session, kchan, &discarded_events, &lost_packets); | |
999af9c1 JR |
3776 | if (ret < 0) { |
3777 | ret_code = LTTNG_ERR_UNK; | |
3778 | goto end; | |
3779 | } | |
3780 | ||
3781 | /* | |
3782 | * Update the discarded_events and lost_packets | |
3783 | * count for the channel | |
3784 | */ | |
3785 | extended->discarded_events = discarded_events; | |
3786 | extended->lost_packets = lost_packets; | |
3787 | ||
28ab034a | 3788 | ret = lttng_channel_serialize(kchan->channel, &payload->buffer); |
999af9c1 JR |
3789 | if (ret) { |
3790 | ERR("Failed to serialize lttng_channel: channel name = '%s'", | |
28ab034a | 3791 | kchan->channel->name); |
999af9c1 JR |
3792 | ret_code = LTTNG_ERR_UNK; |
3793 | goto end; | |
3794 | } | |
3795 | ||
3796 | i++; | |
3797 | } | |
c7d620a2 | 3798 | } |
2f77fc4b | 3799 | break; |
999af9c1 | 3800 | } |
2f77fc4b | 3801 | case LTTNG_DOMAIN_UST: |
999af9c1 JR |
3802 | { |
3803 | struct lttng_ht_iter iter; | |
3804 | struct ltt_ust_channel *uchan; | |
3805 | ||
56047f5a | 3806 | { |
07c4863f | 3807 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a JG |
3808 | |
3809 | cds_lfht_for_each_entry (session->ust_session->domain_global.channels->ht, | |
3810 | &iter.iter, | |
3811 | uchan, | |
3812 | node.node) { | |
3813 | uint64_t discarded_events = 0, lost_packets = 0; | |
3814 | struct lttng_channel *channel = nullptr; | |
3815 | struct lttng_channel_extended *extended; | |
999af9c1 | 3816 | |
56047f5a JG |
3817 | channel = trace_ust_channel_to_lttng_channel(uchan); |
3818 | if (!channel) { | |
3819 | ret_code = LTTNG_ERR_NOMEM; | |
3820 | goto end; | |
3821 | } | |
999af9c1 | 3822 | |
56047f5a JG |
3823 | extended = (struct lttng_channel_extended *) |
3824 | channel->attr.extended.ptr; | |
999af9c1 | 3825 | |
56047f5a JG |
3826 | ret = get_ust_runtime_stats( |
3827 | session, uchan, &discarded_events, &lost_packets); | |
3828 | if (ret < 0) { | |
3829 | lttng_channel_destroy(channel); | |
3830 | ret_code = LTTNG_ERR_UNK; | |
3831 | goto end; | |
3832 | } | |
3833 | ||
3834 | extended->discarded_events = discarded_events; | |
3835 | extended->lost_packets = lost_packets; | |
3836 | ||
3837 | ret = lttng_channel_serialize(channel, &payload->buffer); | |
3838 | if (ret) { | |
3839 | ERR("Failed to serialize lttng_channel: channel name = '%s'", | |
3840 | channel->name); | |
3841 | lttng_channel_destroy(channel); | |
3842 | ret_code = LTTNG_ERR_UNK; | |
3843 | goto end; | |
3844 | } | |
999af9c1 | 3845 | |
ae2275af | 3846 | lttng_channel_destroy(channel); |
56047f5a | 3847 | i++; |
999af9c1 | 3848 | } |
c7d620a2 | 3849 | } |
56047f5a | 3850 | |
2f77fc4b | 3851 | break; |
999af9c1 | 3852 | } |
2f77fc4b | 3853 | default: |
999af9c1 | 3854 | break; |
2f77fc4b DG |
3855 | } |
3856 | ||
999af9c1 JR |
3857 | if (i > UINT32_MAX) { |
3858 | ERR("Channel count would overflow the channel listing command's reply"); | |
3859 | ret_code = LTTNG_ERR_OVERFLOW; | |
3860 | goto end; | |
2f77fc4b DG |
3861 | } |
3862 | ||
999af9c1 JR |
3863 | /* Update command reply header. */ |
3864 | cmd_header.count = (uint32_t) i; | |
28ab034a | 3865 | memcpy(payload->buffer.data + cmd_header_offset, &cmd_header, sizeof(cmd_header)); |
999af9c1 JR |
3866 | ret_code = LTTNG_OK; |
3867 | ||
53e367f9 | 3868 | end: |
999af9c1 | 3869 | return ret_code; |
2f77fc4b DG |
3870 | } |
3871 | ||
3872 | /* | |
3873 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3874 | */ | |
8ddd72ef | 3875 | enum lttng_error_code cmd_list_events(enum lttng_domain_type domain, |
a0a4f314 | 3876 | const ltt_session::locked_ref& session, |
28ab034a JG |
3877 | char *channel_name, |
3878 | struct lttng_payload *reply_payload) | |
2f77fc4b | 3879 | { |
8ddd72ef JR |
3880 | int buffer_resize_ret; |
3881 | enum lttng_error_code ret_code = LTTNG_OK; | |
3882 | struct lttcomm_list_command_header reply_command_header = {}; | |
3883 | size_t reply_command_header_offset; | |
23831239 | 3884 | unsigned int nb_events = 0; |
e368fb43 | 3885 | |
8ddd72ef JR |
3886 | assert(reply_payload); |
3887 | ||
3888 | /* Reserve space for command reply header. */ | |
3889 | reply_command_header_offset = reply_payload->buffer.size; | |
28ab034a JG |
3890 | buffer_resize_ret = lttng_dynamic_buffer_set_size( |
3891 | &reply_payload->buffer, | |
3892 | reply_command_header_offset + sizeof(struct lttcomm_list_command_header)); | |
8ddd72ef JR |
3893 | if (buffer_resize_ret) { |
3894 | ret_code = LTTNG_ERR_NOMEM; | |
3895 | goto end; | |
e368fb43 | 3896 | } |
2f77fc4b DG |
3897 | |
3898 | switch (domain) { | |
3899 | case LTTNG_DOMAIN_KERNEL: | |
cd9adb8b | 3900 | if (session->kernel_session != nullptr) { |
28ab034a JG |
3901 | ret_code = list_lttng_kernel_events( |
3902 | channel_name, session->kernel_session, reply_payload, &nb_events); | |
2f77fc4b | 3903 | } |
8ddd72ef | 3904 | |
2f77fc4b DG |
3905 | break; |
3906 | case LTTNG_DOMAIN_UST: | |
3907 | { | |
cd9adb8b | 3908 | if (session->ust_session != nullptr) { |
28ab034a JG |
3909 | ret_code = |
3910 | list_lttng_ust_global_events(channel_name, | |
3911 | &session->ust_session->domain_global, | |
3912 | reply_payload, | |
3913 | &nb_events); | |
2f77fc4b | 3914 | } |
8ddd72ef | 3915 | |
2f77fc4b DG |
3916 | break; |
3917 | } | |
5cdb6027 | 3918 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3919 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3920 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3921 | if (session->ust_session) { |
fefd409b DG |
3922 | struct lttng_ht_iter iter; |
3923 | struct agent *agt; | |
3924 | ||
07c4863f | 3925 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 3926 | |
28ab034a JG |
3927 | cds_lfht_for_each_entry ( |
3928 | session->ust_session->agents->ht, &iter.iter, agt, node.node) { | |
1dfd9906 | 3929 | if (agt->domain == domain) { |
8ddd72ef | 3930 | ret_code = list_lttng_agent_events( |
28ab034a | 3931 | agt, reply_payload, &nb_events); |
1dfd9906 JG |
3932 | break; |
3933 | } | |
fefd409b | 3934 | } |
3c6a091f DG |
3935 | } |
3936 | break; | |
2f77fc4b | 3937 | default: |
8ddd72ef JR |
3938 | ret_code = LTTNG_ERR_UND; |
3939 | break; | |
2f77fc4b DG |
3940 | } |
3941 | ||
8ddd72ef JR |
3942 | if (nb_events > UINT32_MAX) { |
3943 | ret_code = LTTNG_ERR_OVERFLOW; | |
3944 | goto end; | |
3945 | } | |
e368fb43 | 3946 | |
8ddd72ef JR |
3947 | /* Update command reply header. */ |
3948 | reply_command_header.count = (uint32_t) nb_events; | |
28ab034a JG |
3949 | memcpy(reply_payload->buffer.data + reply_command_header_offset, |
3950 | &reply_command_header, | |
3951 | sizeof(reply_command_header)); | |
2f77fc4b | 3952 | |
8ddd72ef JR |
3953 | end: |
3954 | return ret_code; | |
2f77fc4b DG |
3955 | } |
3956 | ||
3957 | /* | |
3958 | * Using the session list, filled a lttng_session array to send back to the | |
3959 | * client for session listing. | |
3960 | * | |
d9a970b7 | 3961 | * The session list lock MUST be acquired before calling this function. |
2f77fc4b | 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; | |
a0a4f314 | 3970 | struct ltt_session *raw_session_ptr; |
2f77fc4b | 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 | */ | |
a0a4f314 JG |
3979 | cds_list_for_each_entry (raw_session_ptr, &list->head, list) { |
3980 | auto session = [raw_session_ptr]() { | |
3981 | session_get(raw_session_ptr); | |
3982 | raw_session_ptr->lock(); | |
16d64977 | 3983 | return ltt_session::make_locked_ref(*raw_session_ptr); |
a0a4f314 JG |
3984 | }(); |
3985 | ||
2f77fc4b DG |
3986 | /* |
3987 | * Only list the sessions the user can control. | |
3988 | */ | |
28ab034a | 3989 | if (!session_access_ok(session, uid) || session->destroyed) { |
2f77fc4b DG |
3990 | continue; |
3991 | } | |
3992 | ||
3993 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3994 | struct ltt_ust_session *usess = session->ust_session; | |
3995 | ||
3996 | if (session->consumer->type == CONSUMER_DST_NET || | |
28ab034a JG |
3997 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || |
3998 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3999 | ret = build_network_session_path( | |
4000 | sessions[i].path, sizeof(sessions[i].path), session); | |
2f77fc4b | 4001 | } else { |
28ab034a JG |
4002 | ret = snprintf(sessions[i].path, |
4003 | sizeof(sessions[i].path), | |
4004 | "%s", | |
4005 | session->consumer->dst.session_root_path); | |
2f77fc4b DG |
4006 | } |
4007 | if (ret < 0) { | |
4008 | PERROR("snprintf session path"); | |
4009 | continue; | |
4010 | } | |
4011 | ||
4012 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
4013 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 4014 | sessions[i].enabled = session->active; |
2cbf8fed | 4015 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 4016 | sessions[i].live_timer_interval = session->live_timer; |
b178f53e JG |
4017 | extended[i].creation_time.value = (uint64_t) session->creation_time; |
4018 | extended[i].creation_time.is_set = 1; | |
2f77fc4b DG |
4019 | i++; |
4020 | } | |
4021 | } | |
4022 | ||
49cddecd KS |
4023 | /* |
4024 | * Command LTTCOMM_SESSIOND_COMMAND_KERNEL_TRACER_STATUS | |
4025 | */ | |
4026 | enum lttng_error_code cmd_kernel_tracer_status(enum lttng_kernel_tracer_status *status) | |
4027 | { | |
4028 | if (status == nullptr) { | |
4029 | return LTTNG_ERR_INVALID; | |
4030 | } | |
4031 | ||
4032 | *status = get_kernel_tracer_status(); | |
4033 | return LTTNG_OK; | |
4034 | } | |
4035 | ||
806e2684 | 4036 | /* |
6d805429 | 4037 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 4038 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 4039 | */ |
a0a4f314 | 4040 | int cmd_data_pending(const ltt_session::locked_ref& session) |
806e2684 DG |
4041 | { |
4042 | int ret; | |
4043 | struct ltt_kernel_session *ksess = session->kernel_session; | |
4044 | struct ltt_ust_session *usess = session->ust_session; | |
4045 | ||
5c408ad8 JD |
4046 | DBG("Data pending for session %s", session->name); |
4047 | ||
806e2684 | 4048 | /* Session MUST be stopped to ask for data availability. */ |
8382cf6f | 4049 | if (session->active) { |
806e2684 DG |
4050 | ret = LTTNG_ERR_SESSION_STARTED; |
4051 | goto error; | |
3a89d11a DG |
4052 | } else { |
4053 | /* | |
4054 | * If stopped, just make sure we've started before else the above call | |
4055 | * will always send that there is data pending. | |
4056 | * | |
4057 | * The consumer assumes that when the data pending command is received, | |
4058 | * the trace has been started before or else no output data is written | |
4059 | * by the streams which is a condition for data pending. So, this is | |
4060 | * *VERY* important that we don't ask the consumer before a start | |
4061 | * trace. | |
4062 | */ | |
8382cf6f | 4063 | if (!session->has_been_started) { |
3a89d11a DG |
4064 | ret = 0; |
4065 | goto error; | |
4066 | } | |
806e2684 DG |
4067 | } |
4068 | ||
92816cc3 JG |
4069 | /* A rotation is still pending, we have to wait. */ |
4070 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { | |
5c408ad8 JD |
4071 | DBG("Rotate still pending for session %s", session->name); |
4072 | ret = 1; | |
4073 | goto error; | |
4074 | } | |
4075 | ||
806e2684 | 4076 | if (ksess && ksess->consumer) { |
6d805429 DG |
4077 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
4078 | if (ret == 1) { | |
806e2684 DG |
4079 | /* Data is still being extracted for the kernel. */ |
4080 | goto error; | |
4081 | } | |
4082 | } | |
4083 | ||
4084 | if (usess && usess->consumer) { | |
6d805429 DG |
4085 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
4086 | if (ret == 1) { | |
806e2684 DG |
4087 | /* Data is still being extracted for the kernel. */ |
4088 | goto error; | |
4089 | } | |
4090 | } | |
4091 | ||
4092 | /* Data is ready to be read by a viewer */ | |
6d805429 | 4093 | ret = 0; |
806e2684 DG |
4094 | |
4095 | error: | |
4096 | return ret; | |
4097 | } | |
4098 | ||
6dc3064a DG |
4099 | /* |
4100 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
4101 | * | |
4102 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4103 | */ | |
a0a4f314 | 4104 | int cmd_snapshot_add_output(const ltt_session::locked_ref& session, |
28ab034a JG |
4105 | const struct lttng_snapshot_output *output, |
4106 | uint32_t *id) | |
6dc3064a DG |
4107 | { |
4108 | int ret; | |
4109 | struct snapshot_output *new_output; | |
4110 | ||
a0377dfe | 4111 | LTTNG_ASSERT(output); |
6dc3064a DG |
4112 | |
4113 | DBG("Cmd snapshot add output for session %s", session->name); | |
4114 | ||
4115 | /* | |
903ef685 | 4116 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
4117 | */ |
4118 | if (session->output_traces) { | |
903ef685 | 4119 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4120 | goto error; |
4121 | } | |
4122 | ||
54213acc JG |
4123 | if (session->has_non_mmap_channel) { |
4124 | ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED; | |
4125 | goto error; | |
4126 | } | |
4127 | ||
6dc3064a DG |
4128 | /* Only one output is allowed until we have the "tee" feature. */ |
4129 | if (session->snapshot.nb_output == 1) { | |
4130 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
4131 | goto error; | |
4132 | } | |
4133 | ||
4134 | new_output = snapshot_output_alloc(); | |
4135 | if (!new_output) { | |
4136 | ret = LTTNG_ERR_NOMEM; | |
4137 | goto error; | |
4138 | } | |
4139 | ||
28ab034a JG |
4140 | ret = snapshot_output_init(session, |
4141 | output->max_size, | |
4142 | output->name, | |
4143 | output->ctrl_url, | |
4144 | output->data_url, | |
4145 | session->consumer, | |
4146 | new_output, | |
4147 | &session->snapshot); | |
6dc3064a DG |
4148 | if (ret < 0) { |
4149 | if (ret == -ENOMEM) { | |
4150 | ret = LTTNG_ERR_NOMEM; | |
4151 | } else { | |
4152 | ret = LTTNG_ERR_INVALID; | |
4153 | } | |
4154 | goto free_error; | |
4155 | } | |
4156 | ||
6dc3064a DG |
4157 | snapshot_add_output(&session->snapshot, new_output); |
4158 | if (id) { | |
4159 | *id = new_output->id; | |
4160 | } | |
6dc3064a DG |
4161 | |
4162 | return LTTNG_OK; | |
4163 | ||
4164 | free_error: | |
4165 | snapshot_output_destroy(new_output); | |
4166 | error: | |
4167 | return ret; | |
4168 | } | |
4169 | ||
4170 | /* | |
4171 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
4172 | * | |
4173 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4174 | */ | |
a0a4f314 JG |
4175 | int cmd_snapshot_del_output(const ltt_session::locked_ref& session, |
4176 | const struct lttng_snapshot_output *output) | |
6dc3064a DG |
4177 | { |
4178 | int ret; | |
cd9adb8b | 4179 | struct snapshot_output *sout = nullptr; |
6dc3064a | 4180 | |
a0377dfe | 4181 | LTTNG_ASSERT(output); |
6dc3064a | 4182 | |
07c4863f | 4183 | const lttng::urcu::read_lock_guard read_lock; |
6dc3064a DG |
4184 | |
4185 | /* | |
d3f14b8a MD |
4186 | * Permission denied to create an output if the session is not |
4187 | * set in no output mode. | |
6dc3064a DG |
4188 | */ |
4189 | if (session->output_traces) { | |
903ef685 | 4190 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4191 | goto error; |
4192 | } | |
4193 | ||
eb240553 | 4194 | if (output->id) { |
28ab034a JG |
4195 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", |
4196 | output->id, | |
4197 | session->name); | |
eb240553 DG |
4198 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); |
4199 | } else if (*output->name != '\0') { | |
28ab034a | 4200 | DBG("Cmd snapshot del output name %s for session %s", output->name, session->name); |
eb240553 DG |
4201 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); |
4202 | } | |
6dc3064a DG |
4203 | if (!sout) { |
4204 | ret = LTTNG_ERR_INVALID; | |
4205 | goto error; | |
4206 | } | |
4207 | ||
4208 | snapshot_delete_output(&session->snapshot, sout); | |
4209 | snapshot_output_destroy(sout); | |
4210 | ret = LTTNG_OK; | |
4211 | ||
4212 | error: | |
6dc3064a DG |
4213 | return ret; |
4214 | } | |
4215 | ||
4216 | /* | |
4217 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
4218 | * | |
4219 | * If no output is available, outputs is untouched and 0 is returned. | |
4220 | * | |
4221 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
4222 | */ | |
a0a4f314 | 4223 | ssize_t cmd_snapshot_list_outputs(const ltt_session::locked_ref& session, |
28ab034a | 4224 | struct lttng_snapshot_output **outputs) |
6dc3064a DG |
4225 | { |
4226 | int ret, idx = 0; | |
cd9adb8b | 4227 | struct lttng_snapshot_output *list = nullptr; |
6dc3064a DG |
4228 | struct lttng_ht_iter iter; |
4229 | struct snapshot_output *output; | |
4230 | ||
a0377dfe | 4231 | LTTNG_ASSERT(outputs); |
6dc3064a DG |
4232 | |
4233 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
4234 | ||
4235 | /* | |
d3f14b8a MD |
4236 | * Permission denied to create an output if the session is not |
4237 | * set in no output mode. | |
6dc3064a DG |
4238 | */ |
4239 | if (session->output_traces) { | |
903ef685 JG |
4240 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
4241 | goto end; | |
6dc3064a DG |
4242 | } |
4243 | ||
4244 | if (session->snapshot.nb_output == 0) { | |
4245 | ret = 0; | |
903ef685 | 4246 | goto end; |
6dc3064a DG |
4247 | } |
4248 | ||
64803277 | 4249 | list = calloc<lttng_snapshot_output>(session->snapshot.nb_output); |
6dc3064a | 4250 | if (!list) { |
b223ca94 | 4251 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4252 | goto end; |
6dc3064a DG |
4253 | } |
4254 | ||
4255 | /* Copy list from session to the new list object. */ | |
56047f5a | 4256 | { |
07c4863f | 4257 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a JG |
4258 | |
4259 | cds_lfht_for_each_entry ( | |
4260 | session->snapshot.output_ht->ht, &iter.iter, output, node.node) { | |
4261 | LTTNG_ASSERT(output->consumer); | |
4262 | list[idx].id = output->id; | |
4263 | list[idx].max_size = output->max_size; | |
4264 | if (lttng_strncpy(list[idx].name, output->name, sizeof(list[idx].name))) { | |
6ce22875 | 4265 | ret = -LTTNG_ERR_INVALID; |
903ef685 | 4266 | goto error; |
6ce22875 | 4267 | } |
6dc3064a | 4268 | |
56047f5a JG |
4269 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
4270 | if (lttng_strncpy(list[idx].ctrl_url, | |
4271 | output->consumer->dst.session_root_path, | |
4272 | sizeof(list[idx].ctrl_url))) { | |
4273 | ret = -LTTNG_ERR_INVALID; | |
4274 | goto error; | |
4275 | } | |
4276 | } else { | |
4277 | /* Control URI. */ | |
4278 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
4279 | list[idx].ctrl_url, | |
4280 | sizeof(list[idx].ctrl_url)); | |
4281 | if (ret < 0) { | |
4282 | ret = -LTTNG_ERR_NOMEM; | |
4283 | goto error; | |
4284 | } | |
4285 | ||
4286 | /* Data URI. */ | |
4287 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
4288 | list[idx].data_url, | |
4289 | sizeof(list[idx].data_url)); | |
4290 | if (ret < 0) { | |
4291 | ret = -LTTNG_ERR_NOMEM; | |
4292 | goto error; | |
4293 | } | |
6dc3064a | 4294 | } |
56047f5a JG |
4295 | |
4296 | idx++; | |
6dc3064a | 4297 | } |
6dc3064a DG |
4298 | } |
4299 | ||
4300 | *outputs = list; | |
cd9adb8b | 4301 | list = nullptr; |
b223ca94 | 4302 | ret = session->snapshot.nb_output; |
6dc3064a | 4303 | error: |
b223ca94 | 4304 | free(list); |
903ef685 | 4305 | end: |
b223ca94 | 4306 | return ret; |
6dc3064a DG |
4307 | } |
4308 | ||
93ec662e JD |
4309 | /* |
4310 | * Check if we can regenerate the metadata for this session. | |
4311 | * Only kernel, UST per-uid and non-live sessions are supported. | |
4312 | * | |
4313 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
4314 | */ | |
a0a4f314 | 4315 | static int check_regenerate_metadata_support(const ltt_session::locked_ref& session) |
93ec662e JD |
4316 | { |
4317 | int ret; | |
4318 | ||
93ec662e JD |
4319 | if (session->live_timer != 0) { |
4320 | ret = LTTNG_ERR_LIVE_SESSION; | |
4321 | goto end; | |
4322 | } | |
4323 | if (!session->active) { | |
4324 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4325 | goto end; | |
4326 | } | |
4327 | if (session->ust_session) { | |
4328 | switch (session->ust_session->buffer_type) { | |
4329 | case LTTNG_BUFFER_PER_UID: | |
4330 | break; | |
4331 | case LTTNG_BUFFER_PER_PID: | |
4332 | ret = LTTNG_ERR_PER_PID_SESSION; | |
4333 | goto end; | |
4334 | default: | |
a0377dfe | 4335 | abort(); |
93ec662e JD |
4336 | ret = LTTNG_ERR_UNK; |
4337 | goto end; | |
4338 | } | |
4339 | } | |
4340 | if (session->consumer->type == CONSUMER_DST_NET && | |
28ab034a | 4341 | session->consumer->relay_minor_version < 8) { |
93ec662e JD |
4342 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
4343 | goto end; | |
4344 | } | |
4345 | ret = 0; | |
4346 | ||
4347 | end: | |
4348 | return ret; | |
4349 | } | |
4350 | ||
93ec662e | 4351 | /* |
eded6438 | 4352 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
4353 | * |
4354 | * Ask the consumer to truncate the existing metadata file(s) and | |
4355 | * then regenerate the metadata. Live and per-pid sessions are not | |
4356 | * supported and return an error. | |
4357 | * | |
1136f41b | 4358 | * Return LTTNG_OK on success or else a LTTNG_ERR code. |
93ec662e | 4359 | */ |
a0a4f314 | 4360 | int cmd_regenerate_metadata(const ltt_session::locked_ref& session) |
93ec662e JD |
4361 | { |
4362 | int ret; | |
4363 | ||
eded6438 | 4364 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
4365 | if (ret) { |
4366 | goto end; | |
4367 | } | |
4368 | ||
4369 | if (session->kernel_session) { | |
28ab034a | 4370 | ret = kernctl_session_regenerate_metadata(session->kernel_session->fd); |
93ec662e JD |
4371 | if (ret < 0) { |
4372 | ERR("Failed to regenerate the kernel metadata"); | |
4373 | goto end; | |
4374 | } | |
4375 | } | |
4376 | ||
4377 | if (session->ust_session) { | |
d7bfb9b0 | 4378 | ret = trace_ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
4379 | if (ret < 0) { |
4380 | ERR("Failed to regenerate the UST metadata"); | |
4381 | goto end; | |
4382 | } | |
4383 | } | |
4384 | DBG("Cmd metadata regenerate for session %s", session->name); | |
4385 | ret = LTTNG_OK; | |
4386 | ||
4387 | end: | |
4388 | return ret; | |
4389 | } | |
4390 | ||
c2561365 JD |
4391 | /* |
4392 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
4393 | * | |
4394 | * Ask the tracer to regenerate a new statedump. | |
4395 | * | |
1136f41b | 4396 | * Return LTTNG_OK on success or else a LTTNG_ERR code. |
c2561365 | 4397 | */ |
a0a4f314 | 4398 | int cmd_regenerate_statedump(const ltt_session::locked_ref& session) |
c2561365 JD |
4399 | { |
4400 | int ret; | |
4401 | ||
c2561365 JD |
4402 | if (!session->active) { |
4403 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4404 | goto end; | |
4405 | } | |
c2561365 JD |
4406 | |
4407 | if (session->kernel_session) { | |
28ab034a | 4408 | ret = kernctl_session_regenerate_statedump(session->kernel_session->fd); |
c2561365 JD |
4409 | /* |
4410 | * Currently, the statedump in kernel can only fail if out | |
4411 | * of memory. | |
4412 | */ | |
4413 | if (ret < 0) { | |
4414 | if (ret == -ENOMEM) { | |
4415 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
4416 | } else { | |
4417 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4418 | } | |
4419 | ERR("Failed to regenerate the kernel statedump"); | |
4420 | goto end; | |
4421 | } | |
4422 | } | |
4423 | ||
4424 | if (session->ust_session) { | |
4425 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
4426 | /* | |
4427 | * Currently, the statedump in UST always returns 0. | |
4428 | */ | |
4429 | if (ret < 0) { | |
4430 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4431 | ERR("Failed to regenerate the UST statedump"); | |
4432 | goto end; | |
4433 | } | |
4434 | } | |
4435 | DBG("Cmd regenerate statedump for session %s", session->name); | |
4436 | ret = LTTNG_OK; | |
4437 | ||
4438 | end: | |
4439 | return ret; | |
4440 | } | |
4441 | ||
28ab034a JG |
4442 | static enum lttng_error_code |
4443 | synchronize_tracer_notifier_register(struct notification_thread_handle *notification_thread, | |
4444 | struct lttng_trigger *trigger, | |
4445 | const struct lttng_credentials *cmd_creds) | |
70670472 | 4446 | { |
989a0844 | 4447 | enum lttng_error_code ret_code; |
28ab034a | 4448 | const struct lttng_condition *condition = lttng_trigger_get_const_condition(trigger); |
989a0844 FD |
4449 | const char *trigger_name; |
4450 | uid_t trigger_owner; | |
4451 | enum lttng_trigger_status trigger_status; | |
4452 | const enum lttng_domain_type trigger_domain = | |
28ab034a | 4453 | lttng_trigger_get_underlying_domain_type_restriction(trigger); |
70670472 | 4454 | |
989a0844 | 4455 | trigger_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner); |
a0377dfe | 4456 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
989a0844 | 4457 | |
a0377dfe FD |
4458 | LTTNG_ASSERT(condition); |
4459 | LTTNG_ASSERT(lttng_condition_get_type(condition) == | |
28ab034a | 4460 | LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES); |
989a0844 FD |
4461 | |
4462 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
28ab034a | 4463 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
989a0844 | 4464 | |
d9a970b7 | 4465 | const auto list_lock = lttng::sessiond::lock_session_list(); |
989a0844 FD |
4466 | switch (trigger_domain) { |
4467 | case LTTNG_DOMAIN_KERNEL: | |
4468 | { | |
4469 | ret_code = kernel_register_event_notifier(trigger, cmd_creds); | |
4470 | if (ret_code != LTTNG_OK) { | |
4471 | enum lttng_error_code notif_thread_unregister_ret; | |
4472 | ||
4473 | notif_thread_unregister_ret = | |
28ab034a JG |
4474 | notification_thread_command_unregister_trigger(notification_thread, |
4475 | trigger); | |
989a0844 FD |
4476 | |
4477 | if (notif_thread_unregister_ret != LTTNG_OK) { | |
4478 | /* Return the original error code. */ | |
4479 | ERR("Failed to unregister trigger from notification thread during error recovery: trigger name = '%s', trigger owner uid = %d, error code = %d", | |
28ab034a JG |
4480 | trigger_name, |
4481 | (int) trigger_owner, | |
4482 | ret_code); | |
989a0844 | 4483 | } |
7ebbf3f0 | 4484 | |
d9a970b7 | 4485 | return ret_code; |
989a0844 FD |
4486 | } |
4487 | break; | |
70670472 | 4488 | } |
989a0844 FD |
4489 | case LTTNG_DOMAIN_UST: |
4490 | ust_app_global_update_all_event_notifier_rules(); | |
4491 | break; | |
4492 | case LTTNG_DOMAIN_JUL: | |
4493 | case LTTNG_DOMAIN_LOG4J: | |
4494 | case LTTNG_DOMAIN_PYTHON: | |
4495 | { | |
4496 | /* Agent domains. */ | |
28ab034a | 4497 | struct agent *agt = agent_find_by_event_notifier_domain(trigger_domain); |
70670472 | 4498 | |
989a0844 FD |
4499 | if (!agt) { |
4500 | agt = agent_create(trigger_domain); | |
4501 | if (!agt) { | |
4502 | ret_code = LTTNG_ERR_NOMEM; | |
d9a970b7 | 4503 | return ret_code; |
989a0844 FD |
4504 | } |
4505 | ||
412d7227 | 4506 | agent_add(agt, the_trigger_agents_ht_by_domain); |
989a0844 FD |
4507 | } |
4508 | ||
7966af57 | 4509 | ret_code = (lttng_error_code) trigger_agent_enable(trigger, agt); |
989a0844 | 4510 | if (ret_code != LTTNG_OK) { |
d9a970b7 | 4511 | return ret_code; |
989a0844 FD |
4512 | } |
4513 | ||
4514 | break; | |
4515 | } | |
4516 | case LTTNG_DOMAIN_NONE: | |
4517 | default: | |
4518 | abort(); | |
4519 | } | |
4520 | ||
d9a970b7 | 4521 | return LTTNG_OK; |
70670472 JR |
4522 | } |
4523 | ||
d9a970b7 JG |
4524 | lttng::ctl::trigger cmd_register_trigger(const struct lttng_credentials *cmd_creds, |
4525 | struct lttng_trigger *trigger, | |
4526 | bool is_trigger_anonymous, | |
4527 | struct notification_thread_handle *notification_thread) | |
b0880ae5 | 4528 | { |
70670472 | 4529 | enum lttng_error_code ret_code; |
70670472 JR |
4530 | const char *trigger_name; |
4531 | uid_t trigger_owner; | |
4532 | enum lttng_trigger_status trigger_status; | |
4533 | ||
4534 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
28ab034a | 4535 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
ce0b1d61 | 4536 | |
28ab034a | 4537 | trigger_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner); |
a0377dfe | 4538 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
70670472 JR |
4539 | |
4540 | DBG("Running register trigger command: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", | |
28ab034a JG |
4541 | trigger_name, |
4542 | (int) trigger_owner, | |
4543 | (int) lttng_credentials_get_uid(cmd_creds)); | |
b0880ae5 | 4544 | |
64eafdf6 JR |
4545 | /* |
4546 | * Validate the trigger credentials against the command credentials. | |
4547 | * Only the root user can register a trigger with non-matching | |
4548 | * credentials. | |
4549 | */ | |
28ab034a | 4550 | if (!lttng_credentials_is_equal_uid(lttng_trigger_get_credentials(trigger), cmd_creds)) { |
746e08d7 | 4551 | if (lttng_credentials_get_uid(cmd_creds) != 0) { |
d9a970b7 JG |
4552 | LTTNG_THROW_CTL( |
4553 | fmt::format( | |
4554 | "Trigger credentials do not match the command credentials: trigger_name = `{}`, trigger_owner_uid={}, command_creds_uid={}", | |
4555 | trigger_name, | |
4556 | trigger_owner, | |
4557 | lttng_credentials_get_uid(cmd_creds)), | |
4558 | LTTNG_ERR_INVALID_TRIGGER); | |
64eafdf6 JR |
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) { | |
d9a970b7 JG |
4568 | LTTNG_THROW_CTL( |
4569 | fmt::format( | |
4570 | "Failed to generate bytecode of trigger: trigger_name=`{}`, trigger_owner_uid={}", | |
4571 | trigger_name, | |
4572 | trigger_owner), | |
4573 | ret_code); | |
58daac01 JR |
4574 | } |
4575 | ||
242388e4 JR |
4576 | /* |
4577 | * A reference to the trigger is acquired by the notification thread. | |
4578 | * It is safe to return the same trigger to the caller since it the | |
4579 | * other user holds a reference. | |
4580 | * | |
4581 | * The trigger is modified during the execution of the | |
4582 | * "register trigger" command. However, by the time the command returns, | |
4583 | * it is safe to use without any locking as its properties are | |
4584 | * immutable. | |
4585 | */ | |
0efb2ad7 | 4586 | ret_code = notification_thread_command_register_trigger( |
28ab034a | 4587 | notification_thread, trigger, is_trigger_anonymous); |
70670472 | 4588 | if (ret_code != LTTNG_OK) { |
d9a970b7 JG |
4589 | LTTNG_THROW_CTL( |
4590 | fmt::format( | |
4591 | "Failed to register trigger to notification thread: trigger_name=`{}`, trigger_owner_uid={}", | |
4592 | trigger_name, | |
4593 | trigger_owner), | |
4594 | ret_code); | |
70670472 JR |
4595 | } |
4596 | ||
ce0b1d61 | 4597 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); |
28ab034a | 4598 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
ce0b1d61 | 4599 | |
70670472 JR |
4600 | /* |
4601 | * Synchronize tracers if the trigger adds an event notifier. | |
4602 | */ | |
989a0844 | 4603 | if (lttng_trigger_needs_tracer_notifier(trigger)) { |
28ab034a JG |
4604 | ret_code = synchronize_tracer_notifier_register( |
4605 | notification_thread, trigger, cmd_creds); | |
989a0844 | 4606 | if (ret_code != LTTNG_OK) { |
d9a970b7 | 4607 | LTTNG_THROW_CTL("Failed to register tracer notifier", ret_code); |
70670472 JR |
4608 | } |
4609 | } | |
4610 | ||
746e08d7 JG |
4611 | /* |
4612 | * Return an updated trigger to the client. | |
4613 | * | |
4614 | * Since a modified version of the same trigger is returned, acquire a | |
4615 | * reference to the trigger so the caller doesn't have to care if those | |
4616 | * are distinct instances or not. | |
4617 | */ | |
d9a970b7 JG |
4618 | LTTNG_ASSERT(ret_code == LTTNG_OK); |
4619 | lttng_trigger_get(trigger); | |
4620 | return lttng::ctl::trigger(trigger); | |
989a0844 FD |
4621 | } |
4622 | ||
28ab034a JG |
4623 | static enum lttng_error_code |
4624 | synchronize_tracer_notifier_unregister(const struct lttng_trigger *trigger) | |
989a0844 FD |
4625 | { |
4626 | enum lttng_error_code ret_code; | |
28ab034a | 4627 | const struct lttng_condition *condition = lttng_trigger_get_const_condition(trigger); |
989a0844 | 4628 | const enum lttng_domain_type trigger_domain = |
28ab034a | 4629 | lttng_trigger_get_underlying_domain_type_restriction(trigger); |
989a0844 | 4630 | |
a0377dfe FD |
4631 | LTTNG_ASSERT(condition); |
4632 | LTTNG_ASSERT(lttng_condition_get_type(condition) == | |
28ab034a | 4633 | LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES); |
989a0844 | 4634 | |
d9a970b7 | 4635 | const auto list_lock = lttng::sessiond::lock_session_list(); |
989a0844 FD |
4636 | switch (trigger_domain) { |
4637 | case LTTNG_DOMAIN_KERNEL: | |
4638 | ret_code = kernel_unregister_event_notifier(trigger); | |
e689039f | 4639 | if (ret_code != LTTNG_OK) { |
d9a970b7 | 4640 | return ret_code; |
e689039f JG |
4641 | } |
4642 | ||
989a0844 FD |
4643 | break; |
4644 | case LTTNG_DOMAIN_UST: | |
4645 | ust_app_global_update_all_event_notifier_rules(); | |
4646 | break; | |
4647 | case LTTNG_DOMAIN_JUL: | |
4648 | case LTTNG_DOMAIN_LOG4J: | |
4649 | case LTTNG_DOMAIN_PYTHON: | |
4650 | { | |
4651 | /* Agent domains. */ | |
28ab034a | 4652 | struct agent *agt = agent_find_by_event_notifier_domain(trigger_domain); |
989a0844 | 4653 | |
566190c4 JG |
4654 | /* |
4655 | * This trigger was never registered in the first place. Calling | |
4656 | * this function under those circumstances is an internal error. | |
4657 | */ | |
a0377dfe | 4658 | LTTNG_ASSERT(agt); |
7966af57 | 4659 | ret_code = (lttng_error_code) trigger_agent_disable(trigger, agt); |
989a0844 | 4660 | if (ret_code != LTTNG_OK) { |
d9a970b7 | 4661 | return ret_code; |
989a0844 FD |
4662 | } |
4663 | ||
4664 | break; | |
4665 | } | |
4666 | case LTTNG_DOMAIN_NONE: | |
4667 | default: | |
4668 | abort(); | |
4669 | } | |
4670 | ||
d9a970b7 | 4671 | return LTTNG_OK; |
b0880ae5 JG |
4672 | } |
4673 | ||
70670472 | 4674 | enum lttng_error_code cmd_unregister_trigger(const struct lttng_credentials *cmd_creds, |
28ab034a JG |
4675 | const struct lttng_trigger *trigger, |
4676 | struct notification_thread_handle *notification_thread) | |
b0880ae5 | 4677 | { |
70670472 | 4678 | enum lttng_error_code ret_code; |
70670472 JR |
4679 | const char *trigger_name; |
4680 | uid_t trigger_owner; | |
4681 | enum lttng_trigger_status trigger_status; | |
cd9adb8b | 4682 | struct lttng_trigger *sessiond_trigger = nullptr; |
70670472 JR |
4683 | |
4684 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
0efb2ad7 | 4685 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
989a0844 | 4686 | trigger_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner); |
a0377dfe | 4687 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
70670472 JR |
4688 | |
4689 | DBG("Running unregister trigger command: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", | |
28ab034a JG |
4690 | trigger_name, |
4691 | (int) trigger_owner, | |
4692 | (int) lttng_credentials_get_uid(cmd_creds)); | |
b0880ae5 | 4693 | |
64eafdf6 JR |
4694 | /* |
4695 | * Validate the trigger credentials against the command credentials. | |
4696 | * Only the root user can unregister a trigger with non-matching | |
4697 | * credentials. | |
4698 | */ | |
28ab034a | 4699 | if (!lttng_credentials_is_equal_uid(lttng_trigger_get_credentials(trigger), cmd_creds)) { |
746e08d7 | 4700 | if (lttng_credentials_get_uid(cmd_creds) != 0) { |
70670472 | 4701 | ERR("Trigger credentials do not match the command credentials: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", |
28ab034a JG |
4702 | trigger_name, |
4703 | (int) trigger_owner, | |
4704 | (int) lttng_credentials_get_uid(cmd_creds)); | |
70670472 | 4705 | ret_code = LTTNG_ERR_INVALID_TRIGGER; |
64eafdf6 JR |
4706 | goto end; |
4707 | } | |
4708 | } | |
3da864a9 | 4709 | |
5c5373c3 JR |
4710 | /* Fetch the sessiond side trigger object. */ |
4711 | ret_code = notification_thread_command_get_trigger( | |
28ab034a | 4712 | notification_thread, trigger, &sessiond_trigger); |
5c5373c3 JR |
4713 | if (ret_code != LTTNG_OK) { |
4714 | DBG("Failed to get trigger from notification thread during unregister: trigger name = '%s', trigger owner uid = %d, error code = %d", | |
28ab034a JG |
4715 | trigger_name, |
4716 | (int) trigger_owner, | |
4717 | ret_code); | |
5c5373c3 JR |
4718 | goto end; |
4719 | } | |
4720 | ||
a0377dfe | 4721 | LTTNG_ASSERT(sessiond_trigger); |
5c5373c3 JR |
4722 | |
4723 | /* | |
4724 | * From this point on, no matter what, consider the trigger | |
4725 | * unregistered. | |
4726 | * | |
4727 | * We set the unregistered state of the sessiond side trigger object in | |
4728 | * the client thread since we want to minimize the possibility of the | |
4729 | * notification thread being stalled due to a long execution of an | |
4730 | * action that required the trigger lock. | |
4731 | */ | |
4732 | lttng_trigger_set_as_unregistered(sessiond_trigger); | |
4733 | ||
28ab034a | 4734 | ret_code = notification_thread_command_unregister_trigger(notification_thread, trigger); |
70670472 | 4735 | if (ret_code != LTTNG_OK) { |
ce0b1d61 | 4736 | DBG("Failed to unregister trigger from notification thread: trigger name = '%s', trigger owner uid = %d, error code = %d", |
28ab034a JG |
4737 | trigger_name, |
4738 | (int) trigger_owner, | |
4739 | ret_code); | |
13839b27 | 4740 | goto end; |
70670472 JR |
4741 | } |
4742 | ||
4743 | /* | |
4744 | * Synchronize tracers if the trigger removes an event notifier. | |
44760c20 JR |
4745 | * Do this even if the trigger unregistration failed to at least stop |
4746 | * the tracers from producing notifications associated with this | |
4747 | * event notifier. | |
70670472 | 4748 | */ |
989a0844 FD |
4749 | if (lttng_trigger_needs_tracer_notifier(trigger)) { |
4750 | ret_code = synchronize_tracer_notifier_unregister(trigger); | |
4751 | if (ret_code != LTTNG_OK) { | |
4752 | ERR("Error unregistering trigger to tracer."); | |
4753 | goto end; | |
70670472 JR |
4754 | } |
4755 | } | |
4756 | ||
b0880ae5 | 4757 | end: |
5c5373c3 | 4758 | lttng_trigger_put(sessiond_trigger); |
70670472 | 4759 | return ret_code; |
989a0844 | 4760 | } |
b0880ae5 | 4761 | |
ddd915a3 | 4762 | enum lttng_error_code cmd_list_triggers(struct command_ctx *cmd_ctx, |
28ab034a JG |
4763 | struct notification_thread_handle *notification_thread, |
4764 | struct lttng_triggers **return_triggers) | |
fbc9f37d | 4765 | { |
f2bda80e | 4766 | int ret; |
fbc9f37d | 4767 | enum lttng_error_code ret_code; |
cd9adb8b | 4768 | struct lttng_triggers *triggers = nullptr; |
fbc9f37d JR |
4769 | |
4770 | /* Get the set of triggers from the notification thread. */ | |
4771 | ret_code = notification_thread_command_list_triggers( | |
28ab034a | 4772 | notification_thread, cmd_ctx->creds.uid, &triggers); |
fbc9f37d | 4773 | if (ret_code != LTTNG_OK) { |
fbc9f37d JR |
4774 | goto end; |
4775 | } | |
4776 | ||
f2bda80e JG |
4777 | ret = lttng_triggers_remove_hidden_triggers(triggers); |
4778 | if (ret) { | |
4779 | ret_code = LTTNG_ERR_UNK; | |
4780 | goto end; | |
4781 | } | |
4782 | ||
fbc9f37d | 4783 | *return_triggers = triggers; |
cd9adb8b | 4784 | triggers = nullptr; |
ddd915a3 | 4785 | ret_code = LTTNG_OK; |
fbc9f37d JR |
4786 | end: |
4787 | lttng_triggers_destroy(triggers); | |
ddd915a3 | 4788 | return ret_code; |
fbc9f37d | 4789 | } |
588c4b0d | 4790 | |
28ab034a JG |
4791 | enum lttng_error_code |
4792 | cmd_execute_error_query(const struct lttng_credentials *cmd_creds, | |
4793 | const struct lttng_error_query *query, | |
4794 | struct lttng_error_query_results **_results, | |
4795 | struct notification_thread_handle *notification_thread) | |
588c4b0d JG |
4796 | { |
4797 | enum lttng_error_code ret_code; | |
4798 | const struct lttng_trigger *query_target_trigger; | |
cd9adb8b JG |
4799 | const struct lttng_action *query_target_action = nullptr; |
4800 | struct lttng_trigger *matching_trigger = nullptr; | |
588c4b0d JG |
4801 | const char *trigger_name; |
4802 | uid_t trigger_owner; | |
4803 | enum lttng_trigger_status trigger_status; | |
cd9adb8b | 4804 | struct lttng_error_query_results *results = nullptr; |
588c4b0d JG |
4805 | |
4806 | switch (lttng_error_query_get_target_type(query)) { | |
4807 | case LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER: | |
4808 | query_target_trigger = lttng_error_query_trigger_borrow_target(query); | |
4809 | break; | |
63dd3d7b | 4810 | case LTTNG_ERROR_QUERY_TARGET_TYPE_CONDITION: |
28ab034a | 4811 | query_target_trigger = lttng_error_query_condition_borrow_target(query); |
63dd3d7b | 4812 | break; |
588c4b0d | 4813 | case LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION: |
28ab034a | 4814 | query_target_trigger = lttng_error_query_action_borrow_trigger_target(query); |
588c4b0d JG |
4815 | break; |
4816 | default: | |
4817 | abort(); | |
4818 | } | |
4819 | ||
a0377dfe | 4820 | LTTNG_ASSERT(query_target_trigger); |
588c4b0d | 4821 | |
28ab034a JG |
4822 | ret_code = notification_thread_command_get_trigger( |
4823 | notification_thread, query_target_trigger, &matching_trigger); | |
588c4b0d JG |
4824 | if (ret_code != LTTNG_OK) { |
4825 | goto end; | |
4826 | } | |
4827 | ||
4828 | /* No longer needed. */ | |
cd9adb8b | 4829 | query_target_trigger = nullptr; |
588c4b0d | 4830 | |
28ab034a | 4831 | if (lttng_error_query_get_target_type(query) == LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION) { |
588c4b0d JG |
4832 | /* Get the sessiond-side version of the target action. */ |
4833 | query_target_action = | |
28ab034a | 4834 | lttng_error_query_action_borrow_action_target(query, matching_trigger); |
588c4b0d JG |
4835 | } |
4836 | ||
4837 | trigger_status = lttng_trigger_get_name(matching_trigger, &trigger_name); | |
28ab034a JG |
4838 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : "(anonymous)"; |
4839 | trigger_status = lttng_trigger_get_owner_uid(matching_trigger, &trigger_owner); | |
a0377dfe | 4840 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
588c4b0d JG |
4841 | |
4842 | results = lttng_error_query_results_create(); | |
4843 | if (!results) { | |
4844 | ret_code = LTTNG_ERR_NOMEM; | |
4845 | goto end; | |
4846 | } | |
4847 | ||
4848 | DBG("Running \"execute error query\" command: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", | |
28ab034a JG |
4849 | trigger_name, |
4850 | (int) trigger_owner, | |
4851 | (int) lttng_credentials_get_uid(cmd_creds)); | |
588c4b0d JG |
4852 | |
4853 | /* | |
4854 | * Validate the trigger credentials against the command credentials. | |
4855 | * Only the root user can target a trigger with non-matching | |
4856 | * credentials. | |
4857 | */ | |
28ab034a JG |
4858 | if (!lttng_credentials_is_equal_uid(lttng_trigger_get_credentials(matching_trigger), |
4859 | cmd_creds)) { | |
588c4b0d JG |
4860 | if (lttng_credentials_get_uid(cmd_creds) != 0) { |
4861 | ERR("Trigger credentials do not match the command credentials: trigger name = '%s', trigger owner uid = %d, command creds uid = %d", | |
28ab034a JG |
4862 | trigger_name, |
4863 | (int) trigger_owner, | |
4864 | (int) lttng_credentials_get_uid(cmd_creds)); | |
588c4b0d JG |
4865 | ret_code = LTTNG_ERR_INVALID_TRIGGER; |
4866 | goto end; | |
4867 | } | |
4868 | } | |
4869 | ||
4870 | switch (lttng_error_query_get_target_type(query)) { | |
4871 | case LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER: | |
28ab034a | 4872 | trigger_status = lttng_trigger_add_error_results(matching_trigger, results); |
588c4b0d JG |
4873 | |
4874 | switch (trigger_status) { | |
4875 | case LTTNG_TRIGGER_STATUS_OK: | |
4876 | break; | |
4877 | default: | |
4878 | ret_code = LTTNG_ERR_UNK; | |
4879 | goto end; | |
4880 | } | |
4881 | ||
4882 | break; | |
63dd3d7b JG |
4883 | case LTTNG_ERROR_QUERY_TARGET_TYPE_CONDITION: |
4884 | { | |
28ab034a JG |
4885 | trigger_status = |
4886 | lttng_trigger_condition_add_error_results(matching_trigger, results); | |
63dd3d7b JG |
4887 | |
4888 | switch (trigger_status) { | |
4889 | case LTTNG_TRIGGER_STATUS_OK: | |
4890 | break; | |
4891 | default: | |
4892 | ret_code = LTTNG_ERR_UNK; | |
4893 | goto end; | |
4894 | } | |
4895 | ||
4896 | break; | |
4897 | } | |
588c4b0d JG |
4898 | case LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION: |
4899 | { | |
4900 | const enum lttng_action_status action_status = | |
28ab034a | 4901 | lttng_action_add_error_query_results(query_target_action, results); |
588c4b0d JG |
4902 | |
4903 | switch (action_status) { | |
4904 | case LTTNG_ACTION_STATUS_OK: | |
4905 | break; | |
4906 | default: | |
4907 | ret_code = LTTNG_ERR_UNK; | |
4908 | goto end; | |
4909 | } | |
4910 | ||
4911 | break; | |
4912 | } | |
4913 | default: | |
ef4cf1d2 | 4914 | abort(); |
588c4b0d JG |
4915 | break; |
4916 | } | |
4917 | ||
4918 | *_results = results; | |
cd9adb8b | 4919 | results = nullptr; |
588c4b0d JG |
4920 | ret_code = LTTNG_OK; |
4921 | end: | |
4922 | lttng_trigger_put(matching_trigger); | |
4923 | lttng_error_query_results_destroy(results); | |
4924 | return ret_code; | |
4925 | } | |
4926 | ||
6dc3064a DG |
4927 | /* |
4928 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
4929 | * snapshot output is *not* set with a remote destination. | |
4930 | * | |
9a654598 | 4931 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4932 | */ |
28ab034a | 4933 | static enum lttng_error_code set_relayd_for_snapshot(struct consumer_output *output, |
a0a4f314 | 4934 | const ltt_session::locked_ref& session) |
6dc3064a | 4935 | { |
9a654598 | 4936 | enum lttng_error_code status = LTTNG_OK; |
6dc3064a DG |
4937 | struct lttng_ht_iter iter; |
4938 | struct consumer_socket *socket; | |
1e791a74 | 4939 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
6fa5fe7c | 4940 | const char *base_path; |
6dc3064a | 4941 | |
a0377dfe | 4942 | LTTNG_ASSERT(output); |
6dc3064a DG |
4943 | |
4944 | DBG2("Set relayd object from snapshot output"); | |
4945 | ||
1e791a74 | 4946 | if (session->current_trace_chunk) { |
07c4863f | 4947 | const lttng_trace_chunk_status chunk_status = lttng_trace_chunk_get_id( |
28ab034a | 4948 | session->current_trace_chunk, ¤t_chunk_id.value); |
1e791a74 | 4949 | |
348a81dc | 4950 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) { |
1e791a74 JG |
4951 | current_chunk_id.is_set = true; |
4952 | } else { | |
4953 | ERR("Failed to get current trace chunk id"); | |
4954 | status = LTTNG_ERR_UNK; | |
4955 | goto error; | |
4956 | } | |
4957 | } | |
4958 | ||
6dc3064a | 4959 | /* Ignore if snapshot consumer output is not network. */ |
348a81dc | 4960 | if (output->type != CONSUMER_DST_NET) { |
6dc3064a DG |
4961 | goto error; |
4962 | } | |
4963 | ||
6fa5fe7c MD |
4964 | /* |
4965 | * The snapshot record URI base path overrides the session | |
4966 | * base path. | |
4967 | */ | |
4968 | if (output->dst.net.control.subdir[0] != '\0') { | |
4969 | base_path = output->dst.net.control.subdir; | |
4970 | } else { | |
4971 | base_path = session->base_path; | |
4972 | } | |
4973 | ||
6dc3064a DG |
4974 | /* |
4975 | * For each consumer socket, create and send the relayd object of the | |
4976 | * snapshot output. | |
4977 | */ | |
56047f5a | 4978 | { |
07c4863f | 4979 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a JG |
4980 | |
4981 | cds_lfht_for_each_entry (output->socks->ht, &iter.iter, socket, node.node) { | |
4982 | pthread_mutex_lock(socket->lock); | |
4983 | status = send_consumer_relayd_sockets( | |
4984 | session->id, | |
4985 | output, | |
4986 | socket, | |
4987 | session->name, | |
4988 | session->hostname, | |
4989 | base_path, | |
4990 | session->live_timer, | |
4991 | current_chunk_id.is_set ? ¤t_chunk_id.value : nullptr, | |
4992 | session->creation_time, | |
4993 | session->name_contains_creation_time); | |
4994 | pthread_mutex_unlock(socket->lock); | |
4995 | if (status != LTTNG_OK) { | |
4996 | goto error; | |
4997 | } | |
6dc3064a DG |
4998 | } |
4999 | } | |
6dc3064a DG |
5000 | |
5001 | error: | |
9a654598 | 5002 | return status; |
6dc3064a DG |
5003 | } |
5004 | ||
5005 | /* | |
5006 | * Record a kernel snapshot. | |
5007 | * | |
fac41e72 | 5008 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 5009 | */ |
28ab034a JG |
5010 | static enum lttng_error_code record_kernel_snapshot(struct ltt_kernel_session *ksess, |
5011 | const struct consumer_output *output, | |
28ab034a | 5012 | uint64_t nb_packets_per_stream) |
6dc3064a | 5013 | { |
9a654598 | 5014 | enum lttng_error_code status; |
6dc3064a | 5015 | |
a0377dfe FD |
5016 | LTTNG_ASSERT(ksess); |
5017 | LTTNG_ASSERT(output); | |
6dc3064a | 5018 | |
28ab034a | 5019 | status = kernel_snapshot_record(ksess, output, nb_packets_per_stream); |
9a654598 | 5020 | return status; |
6dc3064a DG |
5021 | } |
5022 | ||
5023 | /* | |
5024 | * Record a UST snapshot. | |
5025 | * | |
9a654598 | 5026 | * Returns LTTNG_OK on success or a LTTNG_ERR error code. |
6dc3064a | 5027 | */ |
9a654598 | 5028 | static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess, |
28ab034a | 5029 | const struct consumer_output *output, |
28ab034a | 5030 | uint64_t nb_packets_per_stream) |
6dc3064a | 5031 | { |
9a654598 | 5032 | enum lttng_error_code status; |
6dc3064a | 5033 | |
a0377dfe FD |
5034 | LTTNG_ASSERT(usess); |
5035 | LTTNG_ASSERT(output); | |
6dc3064a | 5036 | |
28ab034a | 5037 | status = ust_app_snapshot_record(usess, output, nb_packets_per_stream); |
9a654598 | 5038 | return status; |
6dc3064a DG |
5039 | } |
5040 | ||
a0a4f314 | 5041 | static uint64_t get_session_size_one_more_packet_per_stream(const ltt_session::locked_ref& session, |
28ab034a | 5042 | uint64_t cur_nr_packets) |
68808f4e | 5043 | { |
d07ceecd | 5044 | uint64_t tot_size = 0; |
68808f4e DG |
5045 | |
5046 | if (session->kernel_session) { | |
5047 | struct ltt_kernel_channel *chan; | |
28ab034a | 5048 | const struct ltt_kernel_session *ksess = session->kernel_session; |
68808f4e | 5049 | |
28ab034a | 5050 | cds_list_for_each_entry (chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
5051 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
5052 | /* | |
5053 | * Don't take channel into account if we | |
5054 | * already grab all its packets. | |
5055 | */ | |
5056 | continue; | |
68808f4e | 5057 | } |
28ab034a | 5058 | tot_size += chan->channel->attr.subbuf_size * chan->stream_count; |
68808f4e DG |
5059 | } |
5060 | } | |
5061 | ||
5062 | if (session->ust_session) { | |
fb9a95c4 | 5063 | const struct ltt_ust_session *usess = session->ust_session; |
68808f4e | 5064 | |
28ab034a | 5065 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, cur_nr_packets); |
68808f4e DG |
5066 | } |
5067 | ||
d07ceecd | 5068 | return tot_size; |
68808f4e DG |
5069 | } |
5070 | ||
5c786ded | 5071 | /* |
d07ceecd MD |
5072 | * Calculate the number of packets we can grab from each stream that |
5073 | * fits within the overall snapshot max size. | |
5074 | * | |
5075 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
5076 | * the number of packets per stream. | |
5077 | * | |
5078 | * TODO: this approach is not perfect: we consider the worse case | |
5079 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
5080 | * better if we do this calculation while we actually grab the packet | |
5081 | * content: we would know how much padding we don't actually store into | |
5082 | * the file. | |
5083 | * | |
5084 | * This algorithm is currently bounded by the number of packets per | |
5085 | * stream. | |
5086 | * | |
5087 | * Since we call this algorithm before actually grabbing the data, it's | |
5088 | * an approximation: for instance, applications could appear/disappear | |
5089 | * in between this call and actually grabbing data. | |
5c786ded | 5090 | */ |
a0a4f314 | 5091 | static int64_t get_session_nb_packets_per_stream(const ltt_session::locked_ref& session, |
28ab034a | 5092 | uint64_t max_size) |
5c786ded | 5093 | { |
d07ceecd MD |
5094 | int64_t size_left; |
5095 | uint64_t cur_nb_packets = 0; | |
5c786ded | 5096 | |
d07ceecd | 5097 | if (!max_size) { |
28ab034a | 5098 | return 0; /* Infinite */ |
5c786ded JD |
5099 | } |
5100 | ||
d07ceecd MD |
5101 | size_left = max_size; |
5102 | for (;;) { | |
5103 | uint64_t one_more_packet_tot_size; | |
5c786ded | 5104 | |
28ab034a JG |
5105 | one_more_packet_tot_size = |
5106 | get_session_size_one_more_packet_per_stream(session, cur_nb_packets); | |
d07ceecd MD |
5107 | if (!one_more_packet_tot_size) { |
5108 | /* We are already grabbing all packets. */ | |
5109 | break; | |
5110 | } | |
5111 | size_left -= one_more_packet_tot_size; | |
5112 | if (size_left < 0) { | |
5113 | break; | |
5114 | } | |
5115 | cur_nb_packets++; | |
5c786ded | 5116 | } |
aecf2da5 | 5117 | if (!cur_nb_packets && size_left != max_size) { |
d07ceecd MD |
5118 | /* Not enough room to grab one packet of each stream, error. */ |
5119 | return -1; | |
5120 | } | |
5121 | return cur_nb_packets; | |
5c786ded JD |
5122 | } |
5123 | ||
a0a4f314 | 5124 | static enum lttng_error_code snapshot_record(const ltt_session::locked_ref& session, |
28ab034a | 5125 | const struct snapshot_output *snapshot_output) |
fb9a95c4 JG |
5126 | { |
5127 | int64_t nb_packets_per_stream; | |
d2956687 | 5128 | char snapshot_chunk_name[LTTNG_NAME_MAX]; |
348a81dc JG |
5129 | int ret; |
5130 | enum lttng_error_code ret_code = LTTNG_OK; | |
d2956687 | 5131 | struct lttng_trace_chunk *snapshot_trace_chunk; |
cd9adb8b JG |
5132 | struct consumer_output *original_ust_consumer_output = nullptr; |
5133 | struct consumer_output *original_kernel_consumer_output = nullptr; | |
5134 | struct consumer_output *snapshot_ust_consumer_output = nullptr; | |
5135 | struct consumer_output *snapshot_kernel_consumer_output = nullptr; | |
d2956687 | 5136 | |
28ab034a JG |
5137 | ret = snprintf(snapshot_chunk_name, |
5138 | sizeof(snapshot_chunk_name), | |
5139 | "%s-%s-%" PRIu64, | |
5140 | snapshot_output->name, | |
5141 | snapshot_output->datetime, | |
5142 | snapshot_output->nb_snapshot); | |
348a81dc | 5143 | if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) { |
d2956687 | 5144 | ERR("Failed to format snapshot name"); |
348a81dc JG |
5145 | ret_code = LTTNG_ERR_INVALID; |
5146 | goto error; | |
d2956687 JG |
5147 | } |
5148 | DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"", | |
28ab034a JG |
5149 | snapshot_output->name, |
5150 | session->name, | |
5151 | snapshot_chunk_name); | |
348a81dc JG |
5152 | if (!session->kernel_session && !session->ust_session) { |
5153 | ERR("Failed to record snapshot as no channels exist"); | |
5154 | ret_code = LTTNG_ERR_NO_CHANNEL; | |
5155 | goto error; | |
5156 | } | |
5157 | ||
5158 | if (session->kernel_session) { | |
28ab034a JG |
5159 | original_kernel_consumer_output = session->kernel_session->consumer; |
5160 | snapshot_kernel_consumer_output = consumer_copy_output(snapshot_output->consumer); | |
5161 | strcpy(snapshot_kernel_consumer_output->chunk_path, snapshot_chunk_name); | |
bd666153 JR |
5162 | |
5163 | /* Copy the original domain subdir. */ | |
5164 | strcpy(snapshot_kernel_consumer_output->domain_subdir, | |
28ab034a | 5165 | original_kernel_consumer_output->domain_subdir); |
bd666153 | 5166 | |
348a81dc | 5167 | ret = consumer_copy_sockets(snapshot_kernel_consumer_output, |
28ab034a | 5168 | original_kernel_consumer_output); |
348a81dc JG |
5169 | if (ret < 0) { |
5170 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
5171 | ret_code = LTTNG_ERR_NOMEM; | |
5172 | goto error; | |
5173 | } | |
28ab034a | 5174 | ret_code = set_relayd_for_snapshot(snapshot_kernel_consumer_output, session); |
348a81dc JG |
5175 | if (ret_code != LTTNG_OK) { |
5176 | ERR("Failed to setup relay daemon for kernel tracer snapshot"); | |
5177 | goto error; | |
5178 | } | |
28ab034a | 5179 | session->kernel_session->consumer = snapshot_kernel_consumer_output; |
348a81dc JG |
5180 | } |
5181 | if (session->ust_session) { | |
5182 | original_ust_consumer_output = session->ust_session->consumer; | |
28ab034a JG |
5183 | snapshot_ust_consumer_output = consumer_copy_output(snapshot_output->consumer); |
5184 | strcpy(snapshot_ust_consumer_output->chunk_path, snapshot_chunk_name); | |
bd666153 JR |
5185 | |
5186 | /* Copy the original domain subdir. */ | |
5187 | strcpy(snapshot_ust_consumer_output->domain_subdir, | |
28ab034a | 5188 | original_ust_consumer_output->domain_subdir); |
bd666153 | 5189 | |
348a81dc | 5190 | ret = consumer_copy_sockets(snapshot_ust_consumer_output, |
28ab034a | 5191 | original_ust_consumer_output); |
348a81dc JG |
5192 | if (ret < 0) { |
5193 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
5194 | ret_code = LTTNG_ERR_NOMEM; | |
5195 | goto error; | |
5196 | } | |
28ab034a | 5197 | ret_code = set_relayd_for_snapshot(snapshot_ust_consumer_output, session); |
348a81dc JG |
5198 | if (ret_code != LTTNG_OK) { |
5199 | ERR("Failed to setup relay daemon for userspace tracer snapshot"); | |
5200 | goto error; | |
5201 | } | |
28ab034a | 5202 | session->ust_session->consumer = snapshot_ust_consumer_output; |
348a81dc JG |
5203 | } |
5204 | ||
28ab034a JG |
5205 | snapshot_trace_chunk = session_create_new_trace_chunk( |
5206 | session, | |
5207 | snapshot_kernel_consumer_output ?: snapshot_ust_consumer_output, | |
5208 | consumer_output_get_base_path(snapshot_output->consumer), | |
5209 | snapshot_chunk_name); | |
d2956687 | 5210 | if (!snapshot_trace_chunk) { |
348a81dc | 5211 | ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"", |
28ab034a | 5212 | session->name); |
348a81dc JG |
5213 | ret_code = LTTNG_ERR_CREATE_DIR_FAIL; |
5214 | goto error; | |
d2956687 | 5215 | } |
a0377dfe | 5216 | LTTNG_ASSERT(!session->current_trace_chunk); |
cd9adb8b | 5217 | ret = session_set_trace_chunk(session, snapshot_trace_chunk, nullptr); |
d2956687 | 5218 | lttng_trace_chunk_put(snapshot_trace_chunk); |
cd9adb8b | 5219 | snapshot_trace_chunk = nullptr; |
d2956687 | 5220 | if (ret) { |
348a81dc | 5221 | ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"", |
28ab034a | 5222 | session->name); |
348a81dc JG |
5223 | ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; |
5224 | goto error; | |
d2956687 | 5225 | } |
fb9a95c4 | 5226 | |
28ab034a JG |
5227 | nb_packets_per_stream = |
5228 | get_session_nb_packets_per_stream(session, snapshot_output->max_size); | |
fb9a95c4 | 5229 | if (nb_packets_per_stream < 0) { |
348a81dc | 5230 | ret_code = LTTNG_ERR_MAX_SIZE_INVALID; |
5151d412 | 5231 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5232 | } |
5233 | ||
5234 | if (session->kernel_session) { | |
348a81dc | 5235 | ret_code = record_kernel_snapshot(session->kernel_session, |
28ab034a | 5236 | snapshot_kernel_consumer_output, |
28ab034a | 5237 | nb_packets_per_stream); |
348a81dc | 5238 | if (ret_code != LTTNG_OK) { |
5151d412 | 5239 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5240 | } |
5241 | } | |
5242 | ||
5243 | if (session->ust_session) { | |
a0a4f314 JG |
5244 | ret_code = record_ust_snapshot( |
5245 | session->ust_session, snapshot_ust_consumer_output, nb_packets_per_stream); | |
348a81dc | 5246 | if (ret_code != LTTNG_OK) { |
5151d412 | 5247 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5248 | } |
5249 | } | |
d2956687 | 5250 | |
5151d412 | 5251 | error_close_trace_chunk: |
cd9adb8b | 5252 | if (session_set_trace_chunk(session, nullptr, &snapshot_trace_chunk)) { |
28ab034a | 5253 | ERR("Failed to release the current trace chunk of session \"%s\"", session->name); |
dbfee52c MD |
5254 | ret_code = LTTNG_ERR_UNK; |
5255 | } | |
5256 | ||
28ab034a JG |
5257 | if (session_close_trace_chunk(session, |
5258 | snapshot_trace_chunk, | |
5259 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, | |
cd9adb8b | 5260 | nullptr)) { |
d2956687 JG |
5261 | /* |
5262 | * Don't goto end; make sure the chunk is closed for the session | |
5263 | * to allow future snapshots. | |
5264 | */ | |
28ab034a | 5265 | ERR("Failed to close snapshot trace chunk of session \"%s\"", session->name); |
348a81dc | 5266 | ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; |
d2956687 | 5267 | } |
a49a9216 JG |
5268 | |
5269 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
cd9adb8b | 5270 | snapshot_trace_chunk = nullptr; |
348a81dc JG |
5271 | error: |
5272 | if (original_ust_consumer_output) { | |
5273 | session->ust_session->consumer = original_ust_consumer_output; | |
5274 | } | |
5275 | if (original_kernel_consumer_output) { | |
28ab034a | 5276 | session->kernel_session->consumer = original_kernel_consumer_output; |
348a81dc JG |
5277 | } |
5278 | consumer_output_put(snapshot_ust_consumer_output); | |
5279 | consumer_output_put(snapshot_kernel_consumer_output); | |
5280 | return ret_code; | |
fb9a95c4 JG |
5281 | } |
5282 | ||
6dc3064a DG |
5283 | /* |
5284 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
5285 | * | |
5286 | * The wait parameter is ignored so this call always wait for the snapshot to | |
5287 | * complete before returning. | |
5288 | * | |
5289 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
5290 | */ | |
a0a4f314 | 5291 | int cmd_snapshot_record(const ltt_session::locked_ref& session, |
28ab034a JG |
5292 | const struct lttng_snapshot_output *output, |
5293 | int wait __attribute__((unused))) | |
6dc3064a | 5294 | { |
9a654598 JG |
5295 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5296 | int ret; | |
00e1dfc4 | 5297 | unsigned int snapshot_success = 0; |
10ba83fe | 5298 | char datetime[16]; |
cd9adb8b | 5299 | struct snapshot_output *tmp_output = nullptr; |
6dc3064a | 5300 | |
a0377dfe | 5301 | LTTNG_ASSERT(output); |
6dc3064a DG |
5302 | |
5303 | DBG("Cmd snapshot record for session %s", session->name); | |
5304 | ||
10ba83fe | 5305 | /* Get the datetime for the snapshot output directory. */ |
28ab034a | 5306 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, sizeof(datetime)); |
10ba83fe | 5307 | if (!ret) { |
9a654598 | 5308 | cmd_ret = LTTNG_ERR_INVALID; |
10ba83fe JR |
5309 | goto error; |
5310 | } | |
5311 | ||
6dc3064a | 5312 | /* |
d3f14b8a MD |
5313 | * Permission denied to create an output if the session is not |
5314 | * set in no output mode. | |
6dc3064a DG |
5315 | */ |
5316 | if (session->output_traces) { | |
9a654598 | 5317 | cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
5318 | goto error; |
5319 | } | |
5320 | ||
5321 | /* The session needs to be started at least once. */ | |
8382cf6f | 5322 | if (!session->has_been_started) { |
9a654598 | 5323 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
6dc3064a DG |
5324 | goto error; |
5325 | } | |
5326 | ||
5327 | /* Use temporary output for the session. */ | |
ba45d9f0 | 5328 | if (*output->ctrl_url != '\0') { |
2abe7969 JG |
5329 | tmp_output = snapshot_output_alloc(); |
5330 | if (!tmp_output) { | |
5331 | cmd_ret = LTTNG_ERR_NOMEM; | |
5332 | goto error; | |
5333 | } | |
5334 | ||
28ab034a JG |
5335 | ret = snapshot_output_init(session, |
5336 | output->max_size, | |
5337 | output->name, | |
5338 | output->ctrl_url, | |
5339 | output->data_url, | |
5340 | session->consumer, | |
5341 | tmp_output, | |
cd9adb8b | 5342 | nullptr); |
6dc3064a DG |
5343 | if (ret < 0) { |
5344 | if (ret == -ENOMEM) { | |
9a654598 | 5345 | cmd_ret = LTTNG_ERR_NOMEM; |
6dc3064a | 5346 | } else { |
9a654598 | 5347 | cmd_ret = LTTNG_ERR_INVALID; |
6dc3064a DG |
5348 | } |
5349 | goto error; | |
5350 | } | |
1bfe7328 | 5351 | /* Use the global session count for the temporary snapshot. */ |
2abe7969 | 5352 | tmp_output->nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe JR |
5353 | |
5354 | /* Use the global datetime */ | |
2abe7969 | 5355 | memcpy(tmp_output->datetime, datetime, sizeof(datetime)); |
f46376a1 | 5356 | cmd_ret = snapshot_record(session, tmp_output); |
fb9a95c4 | 5357 | if (cmd_ret != LTTNG_OK) { |
804c90a8 JR |
5358 | goto error; |
5359 | } | |
804c90a8 JR |
5360 | snapshot_success = 1; |
5361 | } else { | |
5362 | struct snapshot_output *sout; | |
5363 | struct lttng_ht_iter iter; | |
68808f4e | 5364 | |
07c4863f | 5365 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 5366 | |
28ab034a JG |
5367 | cds_lfht_for_each_entry ( |
5368 | session->snapshot.output_ht->ht, &iter.iter, sout, node.node) { | |
2abe7969 JG |
5369 | struct snapshot_output output_copy; |
5370 | ||
804c90a8 | 5371 | /* |
2abe7969 JG |
5372 | * Make a local copy of the output and override output |
5373 | * parameters with those provided as part of the | |
5374 | * command. | |
804c90a8 | 5375 | */ |
2abe7969 | 5376 | memcpy(&output_copy, sout, sizeof(output_copy)); |
1bfe7328 | 5377 | |
804c90a8 | 5378 | if (output->max_size != (uint64_t) -1ULL) { |
2abe7969 | 5379 | output_copy.max_size = output->max_size; |
6dc3064a | 5380 | } |
d07ceecd | 5381 | |
2abe7969 | 5382 | output_copy.nb_snapshot = session->snapshot.nb_snapshot; |
28ab034a | 5383 | memcpy(output_copy.datetime, datetime, sizeof(datetime)); |
6dc3064a | 5384 | |
804c90a8 JR |
5385 | /* Use temporary name. */ |
5386 | if (*output->name != '\0') { | |
2abe7969 | 5387 | if (lttng_strncpy(output_copy.name, |
28ab034a JG |
5388 | output->name, |
5389 | sizeof(output_copy.name))) { | |
9a654598 | 5390 | cmd_ret = LTTNG_ERR_INVALID; |
cf3e357d MD |
5391 | goto error; |
5392 | } | |
804c90a8 | 5393 | } |
e1986656 | 5394 | |
f46376a1 | 5395 | cmd_ret = snapshot_record(session, &output_copy); |
fb9a95c4 | 5396 | if (cmd_ret != LTTNG_OK) { |
fb9a95c4 | 5397 | goto error; |
6dc3064a | 5398 | } |
56047f5a | 5399 | |
804c90a8 | 5400 | snapshot_success = 1; |
6dc3064a DG |
5401 | } |
5402 | } | |
5403 | ||
1bfe7328 DG |
5404 | if (snapshot_success) { |
5405 | session->snapshot.nb_snapshot++; | |
b67578cb | 5406 | } else { |
9a654598 | 5407 | cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL; |
1bfe7328 DG |
5408 | } |
5409 | ||
6dc3064a | 5410 | error: |
2abe7969 JG |
5411 | if (tmp_output) { |
5412 | snapshot_output_destroy(tmp_output); | |
5413 | } | |
56047f5a | 5414 | |
9a654598 | 5415 | return cmd_ret; |
6dc3064a DG |
5416 | } |
5417 | ||
d7ba1388 MD |
5418 | /* |
5419 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
5420 | */ | |
a0a4f314 | 5421 | int cmd_set_session_shm_path(const ltt_session::locked_ref& session, const char *shm_path) |
d7ba1388 | 5422 | { |
d7ba1388 MD |
5423 | /* |
5424 | * Can only set shm path before session is started. | |
5425 | */ | |
5426 | if (session->has_been_started) { | |
5427 | return LTTNG_ERR_SESSION_STARTED; | |
5428 | } | |
5429 | ||
28ab034a | 5430 | strncpy(session->shm_path, shm_path, sizeof(session->shm_path)); |
d7ba1388 MD |
5431 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; |
5432 | ||
7e397c55 | 5433 | return LTTNG_OK; |
d7ba1388 MD |
5434 | } |
5435 | ||
5c408ad8 JD |
5436 | /* |
5437 | * Command LTTNG_ROTATE_SESSION from the lttng-ctl library. | |
5438 | * | |
5439 | * Ask the consumer to rotate the session output directory. | |
5440 | * The session lock must be held. | |
5441 | * | |
d5a1b7aa | 5442 | * Returns LTTNG_OK on success or else a negative LTTng error code. |
5c408ad8 | 5443 | */ |
a0a4f314 | 5444 | int cmd_rotate_session(const ltt_session::locked_ref& session, |
28ab034a JG |
5445 | struct lttng_rotate_session_return *rotate_return, |
5446 | bool quiet_rotation, | |
5447 | enum lttng_trace_chunk_command_type command) | |
5c408ad8 JD |
5448 | { |
5449 | int ret; | |
d2956687 | 5450 | uint64_t ongoing_rotation_chunk_id; |
d5a1b7aa | 5451 | enum lttng_error_code cmd_ret = LTTNG_OK; |
cd9adb8b JG |
5452 | struct lttng_trace_chunk *chunk_being_archived = nullptr; |
5453 | struct lttng_trace_chunk *new_trace_chunk = nullptr; | |
d2956687 | 5454 | enum lttng_trace_chunk_status chunk_status; |
3156892b JG |
5455 | bool failed_to_rotate = false; |
5456 | enum lttng_error_code rotation_fail_code = LTTNG_OK; | |
5c408ad8 | 5457 | |
5c408ad8 | 5458 | if (!session->has_been_started) { |
d5a1b7aa | 5459 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
d68c9a04 | 5460 | goto end; |
5c408ad8 JD |
5461 | } |
5462 | ||
d48d65e1 MD |
5463 | /* |
5464 | * Explicit rotation is not supported for live sessions. | |
5465 | * However, live sessions can perform a quiet rotation on | |
5466 | * destroy. | |
5467 | * Rotation is not supported for snapshot traces (no output). | |
5468 | */ | |
28ab034a | 5469 | if ((!quiet_rotation && session->live_timer) || !session->output_traces) { |
d5a1b7aa | 5470 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
d68c9a04 | 5471 | goto end; |
5c408ad8 JD |
5472 | } |
5473 | ||
d2956687 | 5474 | /* Unsupported feature in lttng-relayd before 2.11. */ |
070b6a86 | 5475 | if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET && |
28ab034a JG |
5476 | (session->consumer->relay_major_version == 2 && |
5477 | session->consumer->relay_minor_version < 11)) { | |
d5a1b7aa | 5478 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY; |
d68c9a04 | 5479 | goto end; |
5c408ad8 JD |
5480 | } |
5481 | ||
a40a503f MD |
5482 | /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */ |
5483 | if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) { | |
5484 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL; | |
5485 | goto end; | |
5486 | } | |
5487 | ||
92816cc3 | 5488 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
92816cc3 | 5489 | DBG("Refusing to launch a rotation; a rotation is already in progress for session %s", |
28ab034a | 5490 | session->name); |
d5a1b7aa | 5491 | cmd_ret = LTTNG_ERR_ROTATION_PENDING; |
d68c9a04 | 5492 | goto end; |
5c408ad8 JD |
5493 | } |
5494 | ||
5495 | /* | |
5496 | * After a stop, we only allow one rotation to occur, the other ones are | |
5497 | * useless until a new start. | |
5498 | */ | |
5499 | if (session->rotated_after_last_stop) { | |
5500 | DBG("Session \"%s\" was already rotated after stop, refusing rotation", | |
28ab034a | 5501 | session->name); |
d5a1b7aa | 5502 | cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; |
d68c9a04 | 5503 | goto end; |
5c408ad8 | 5504 | } |
b02f5986 MD |
5505 | |
5506 | /* | |
5507 | * After a stop followed by a clear, disallow following rotations a they would | |
5508 | * generate empty chunks. | |
5509 | */ | |
5510 | if (session->cleared_after_last_stop) { | |
5511 | DBG("Session \"%s\" was already cleared after stop, refusing rotation", | |
28ab034a | 5512 | session->name); |
b02f5986 MD |
5513 | cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR; |
5514 | goto end; | |
5515 | } | |
5516 | ||
d2956687 | 5517 | if (session->active) { |
cd9adb8b JG |
5518 | new_trace_chunk = |
5519 | session_create_new_trace_chunk(session, nullptr, nullptr, nullptr); | |
d2956687 JG |
5520 | if (!new_trace_chunk) { |
5521 | cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
5522 | goto error; | |
5c408ad8 | 5523 | } |
0e270a1e | 5524 | } |
2961f09e | 5525 | |
3156892b JG |
5526 | /* |
5527 | * The current trace chunk becomes the chunk being archived. | |
5528 | * | |
5529 | * After this point, "chunk_being_archived" must absolutely | |
5530 | * be closed on the consumer(s), otherwise it will never be | |
5531 | * cleaned-up, which will result in a leak. | |
5532 | */ | |
28ab034a | 5533 | ret = session_set_trace_chunk(session, new_trace_chunk, &chunk_being_archived); |
d2956687 JG |
5534 | if (ret) { |
5535 | cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
b178f53e JG |
5536 | goto error; |
5537 | } | |
5538 | ||
5c408ad8 | 5539 | if (session->kernel_session) { |
d5a1b7aa JG |
5540 | cmd_ret = kernel_rotate_session(session); |
5541 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5542 | failed_to_rotate = true; |
5543 | rotation_fail_code = cmd_ret; | |
5c408ad8 JD |
5544 | } |
5545 | } | |
5546 | if (session->ust_session) { | |
d5a1b7aa JG |
5547 | cmd_ret = ust_app_rotate_session(session); |
5548 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5549 | failed_to_rotate = true; |
5550 | rotation_fail_code = cmd_ret; | |
5c408ad8 | 5551 | } |
92816cc3 | 5552 | } |
17dd1232 | 5553 | |
3b61d9ee JG |
5554 | if (!session->active) { |
5555 | session->rotated_after_last_stop = true; | |
5556 | } | |
5557 | ||
5558 | if (!chunk_being_archived) { | |
5559 | DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check", | |
28ab034a | 5560 | session->name); |
3b61d9ee JG |
5561 | if (failed_to_rotate) { |
5562 | cmd_ret = rotation_fail_code; | |
5563 | goto error; | |
5564 | } | |
5565 | cmd_ret = LTTNG_OK; | |
5566 | goto end; | |
5567 | } | |
5568 | ||
5569 | session->rotation_state = LTTNG_ROTATION_STATE_ONGOING; | |
28ab034a | 5570 | chunk_status = lttng_trace_chunk_get_id(chunk_being_archived, &ongoing_rotation_chunk_id); |
a0377dfe | 5571 | LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); |
3b61d9ee | 5572 | |
28ab034a JG |
5573 | ret = session_close_trace_chunk( |
5574 | session, chunk_being_archived, command, session->last_chunk_path); | |
d2956687 JG |
5575 | if (ret) { |
5576 | cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; | |
5577 | goto error; | |
5578 | } | |
5579 | ||
3156892b JG |
5580 | if (failed_to_rotate) { |
5581 | cmd_ret = rotation_fail_code; | |
5582 | goto error; | |
5583 | } | |
5584 | ||
7fdbed1c | 5585 | session->quiet_rotation = quiet_rotation; |
28ab034a | 5586 | ret = timer_session_rotation_pending_check_start(session, DEFAULT_ROTATE_PENDING_TIMER); |
92816cc3 | 5587 | if (ret) { |
d5a1b7aa | 5588 | cmd_ret = LTTNG_ERR_UNK; |
2961f09e | 5589 | goto error; |
5c408ad8 JD |
5590 | } |
5591 | ||
5c408ad8 | 5592 | if (rotate_return) { |
d2956687 | 5593 | rotate_return->rotation_id = ongoing_rotation_chunk_id; |
5c408ad8 JD |
5594 | } |
5595 | ||
d2956687 | 5596 | session->chunk_being_archived = chunk_being_archived; |
cd9adb8b | 5597 | chunk_being_archived = nullptr; |
7fdbed1c JG |
5598 | if (!quiet_rotation) { |
5599 | ret = notification_thread_command_session_rotation_ongoing( | |
28ab034a | 5600 | the_notification_thread_handle, session->id, ongoing_rotation_chunk_id); |
7fdbed1c JG |
5601 | if (ret != LTTNG_OK) { |
5602 | ERR("Failed to notify notification thread that a session rotation is ongoing for session %s", | |
28ab034a | 5603 | session->name); |
7966af57 | 5604 | cmd_ret = (lttng_error_code) ret; |
7fdbed1c | 5605 | } |
2961f09e JG |
5606 | } |
5607 | ||
92816cc3 | 5608 | DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent", |
28ab034a JG |
5609 | session->name, |
5610 | ongoing_rotation_chunk_id); | |
5c408ad8 | 5611 | end: |
d2956687 JG |
5612 | lttng_trace_chunk_put(new_trace_chunk); |
5613 | lttng_trace_chunk_put(chunk_being_archived); | |
d5a1b7aa | 5614 | ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret); |
5c408ad8 | 5615 | return ret; |
2961f09e | 5616 | error: |
a0a4f314 | 5617 | if (session_reset_rotation_state(session, LTTNG_ROTATION_STATE_ERROR)) { |
28ab034a | 5618 | ERR("Failed to reset rotation state of session \"%s\"", session->name); |
2961f09e JG |
5619 | } |
5620 | goto end; | |
5c408ad8 JD |
5621 | } |
5622 | ||
5623 | /* | |
d68c9a04 | 5624 | * Command LTTNG_ROTATION_GET_INFO from the lttng-ctl library. |
5c408ad8 JD |
5625 | * |
5626 | * Check if the session has finished its rotation. | |
5627 | * | |
d2956687 | 5628 | * Return LTTNG_OK on success or else an LTTNG_ERR code. |
5c408ad8 | 5629 | */ |
a0a4f314 | 5630 | int cmd_rotate_get_info(const ltt_session::locked_ref& session, |
28ab034a JG |
5631 | struct lttng_rotation_get_info_return *info_return, |
5632 | uint64_t rotation_id) | |
5c408ad8 | 5633 | { |
d2956687 JG |
5634 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5635 | enum lttng_rotation_state rotation_state; | |
5c408ad8 | 5636 | |
28ab034a JG |
5637 | DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, |
5638 | session->name, | |
5639 | session->most_recent_chunk_id.value); | |
5c408ad8 | 5640 | |
d2956687 JG |
5641 | if (session->chunk_being_archived) { |
5642 | enum lttng_trace_chunk_status chunk_status; | |
5643 | uint64_t chunk_id; | |
5644 | ||
28ab034a | 5645 | chunk_status = lttng_trace_chunk_get_id(session->chunk_being_archived, &chunk_id); |
a0377dfe | 5646 | LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); |
d2956687 | 5647 | |
28ab034a JG |
5648 | rotation_state = rotation_id == chunk_id ? LTTNG_ROTATION_STATE_ONGOING : |
5649 | LTTNG_ROTATION_STATE_EXPIRED; | |
d2956687 JG |
5650 | } else { |
5651 | if (session->last_archived_chunk_id.is_set && | |
28ab034a | 5652 | rotation_id != session->last_archived_chunk_id.value) { |
d2956687 JG |
5653 | rotation_state = LTTNG_ROTATION_STATE_EXPIRED; |
5654 | } else { | |
5655 | rotation_state = session->rotation_state; | |
5656 | } | |
5c408ad8 JD |
5657 | } |
5658 | ||
d2956687 JG |
5659 | switch (rotation_state) { |
5660 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
83ed9e90 | 5661 | DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"", |
28ab034a | 5662 | session->name); |
d2956687 JG |
5663 | goto end; |
5664 | case LTTNG_ROTATION_STATE_EXPIRED: | |
28ab034a JG |
5665 | DBG("Reporting that the rotation state of rotation id %" PRIu64 |
5666 | " of session \"%s\" has expired", | |
5667 | rotation_id, | |
5668 | session->name); | |
d2956687 | 5669 | break; |
d68c9a04 | 5670 | case LTTNG_ROTATION_STATE_ONGOING: |
d2956687 | 5671 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending", |
28ab034a JG |
5672 | rotation_id, |
5673 | session->name); | |
d68c9a04 JD |
5674 | break; |
5675 | case LTTNG_ROTATION_STATE_COMPLETED: | |
dd73d57b | 5676 | { |
d2956687 JG |
5677 | int fmt_ret; |
5678 | char *chunk_path; | |
dd73d57b JG |
5679 | char *current_tracing_path_reply; |
5680 | size_t current_tracing_path_reply_len; | |
5681 | ||
d2956687 | 5682 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed", |
28ab034a JG |
5683 | rotation_id, |
5684 | session->name); | |
d2956687 | 5685 | |
dd73d57b JG |
5686 | switch (session_get_consumer_destination_type(session)) { |
5687 | case CONSUMER_DST_LOCAL: | |
28ab034a | 5688 | current_tracing_path_reply = info_return->location.local.absolute_path; |
dd73d57b | 5689 | current_tracing_path_reply_len = |
28ab034a | 5690 | sizeof(info_return->location.local.absolute_path); |
dd73d57b | 5691 | info_return->location_type = |
28ab034a | 5692 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL; |
ecd1a12f | 5693 | fmt_ret = asprintf(&chunk_path, |
28ab034a JG |
5694 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", |
5695 | session_get_base_path(session), | |
5696 | session->last_archived_chunk_name); | |
ecd1a12f MD |
5697 | if (fmt_ret == -1) { |
5698 | PERROR("Failed to format the path of the last archived trace chunk"); | |
5699 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5700 | cmd_ret = LTTNG_ERR_UNK; | |
5701 | goto end; | |
5702 | } | |
dd73d57b JG |
5703 | break; |
5704 | case CONSUMER_DST_NET: | |
09cfbe47 JG |
5705 | { |
5706 | uint16_t ctrl_port, data_port; | |
5707 | ||
28ab034a | 5708 | current_tracing_path_reply = info_return->location.relay.relative_path; |
dd73d57b | 5709 | current_tracing_path_reply_len = |
28ab034a | 5710 | sizeof(info_return->location.relay.relative_path); |
dd73d57b JG |
5711 | /* Currently the only supported relay protocol. */ |
5712 | info_return->location.relay.protocol = | |
28ab034a | 5713 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP; |
dd73d57b | 5714 | |
d2956687 | 5715 | fmt_ret = lttng_strncpy(info_return->location.relay.host, |
28ab034a JG |
5716 | session_get_net_consumer_hostname(session), |
5717 | sizeof(info_return->location.relay.host)); | |
d2956687 JG |
5718 | if (fmt_ret) { |
5719 | ERR("Failed to copy host name to rotate_get_info reply"); | |
dd73d57b | 5720 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5721 | cmd_ret = LTTNG_ERR_SET_URL; |
dd73d57b JG |
5722 | goto end; |
5723 | } | |
5724 | ||
09cfbe47 JG |
5725 | session_get_net_consumer_ports(session, &ctrl_port, &data_port); |
5726 | info_return->location.relay.ports.control = ctrl_port; | |
5727 | info_return->location.relay.ports.data = data_port; | |
dd73d57b | 5728 | info_return->location_type = |
28ab034a | 5729 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY; |
ecd1a12f MD |
5730 | chunk_path = strdup(session->last_chunk_path); |
5731 | if (!chunk_path) { | |
5732 | ERR("Failed to allocate the path of the last archived trace chunk"); | |
5733 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5734 | cmd_ret = LTTNG_ERR_UNK; | |
5735 | goto end; | |
5736 | } | |
dd73d57b | 5737 | break; |
09cfbe47 | 5738 | } |
dd73d57b JG |
5739 | default: |
5740 | abort(); | |
5741 | } | |
d2956687 | 5742 | |
28ab034a JG |
5743 | fmt_ret = lttng_strncpy( |
5744 | current_tracing_path_reply, chunk_path, current_tracing_path_reply_len); | |
d2956687 JG |
5745 | free(chunk_path); |
5746 | if (fmt_ret) { | |
5747 | ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply"); | |
d68c9a04 | 5748 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5749 | cmd_ret = LTTNG_ERR_UNK; |
5c408ad8 JD |
5750 | goto end; |
5751 | } | |
dd73d57b | 5752 | |
d68c9a04 | 5753 | break; |
dd73d57b | 5754 | } |
d68c9a04 | 5755 | case LTTNG_ROTATION_STATE_ERROR: |
28ab034a JG |
5756 | DBG("Reporting that an error occurred during rotation %" PRIu64 |
5757 | " of session \"%s\"", | |
5758 | rotation_id, | |
5759 | session->name); | |
d68c9a04 JD |
5760 | break; |
5761 | default: | |
5762 | abort(); | |
5c408ad8 JD |
5763 | } |
5764 | ||
d2956687 | 5765 | cmd_ret = LTTNG_OK; |
5c408ad8 | 5766 | end: |
d2956687 JG |
5767 | info_return->status = (int32_t) rotation_state; |
5768 | return cmd_ret; | |
5c408ad8 JD |
5769 | } |
5770 | ||
259c2674 JD |
5771 | /* |
5772 | * Command LTTNG_ROTATION_SET_SCHEDULE from the lttng-ctl library. | |
5773 | * | |
5774 | * Configure the automatic rotation parameters. | |
66ea93b1 JG |
5775 | * 'activate' to true means activate the rotation schedule type with 'new_value'. |
5776 | * 'activate' to false means deactivate the rotation schedule and validate that | |
5777 | * 'new_value' has the same value as the currently active value. | |
259c2674 | 5778 | * |
1136f41b | 5779 | * Return LTTNG_OK on success or else a positive LTTNG_ERR code. |
259c2674 | 5780 | */ |
a0a4f314 | 5781 | int cmd_rotation_set_schedule(const ltt_session::locked_ref& session, |
28ab034a JG |
5782 | bool activate, |
5783 | enum lttng_rotation_schedule_type schedule_type, | |
0038180d | 5784 | uint64_t new_value) |
259c2674 JD |
5785 | { |
5786 | int ret; | |
66ea93b1 | 5787 | uint64_t *parameter_value; |
259c2674 | 5788 | |
259c2674 JD |
5789 | DBG("Cmd rotate set schedule session %s", session->name); |
5790 | ||
92fe5ca1 | 5791 | if (session->live_timer || !session->output_traces) { |
66ea93b1 | 5792 | DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session"); |
259c2674 JD |
5793 | ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
5794 | goto end; | |
5795 | } | |
5796 | ||
66ea93b1 JG |
5797 | switch (schedule_type) { |
5798 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5799 | parameter_value = &session->rotate_size; | |
5800 | break; | |
5801 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5802 | parameter_value = &session->rotate_timer_period; | |
5803 | if (new_value >= UINT_MAX) { | |
28ab034a JG |
5804 | DBG("Failing ROTATION_SET_SCHEDULE command as the value requested for a periodic rotation schedule is invalid: %" PRIu64 |
5805 | " > %u (UINT_MAX)", | |
5806 | new_value, | |
5807 | UINT_MAX); | |
66ea93b1 JG |
5808 | ret = LTTNG_ERR_INVALID; |
5809 | goto end; | |
5810 | } | |
5811 | break; | |
5812 | default: | |
5813 | WARN("Failing ROTATION_SET_SCHEDULE command on unknown schedule type"); | |
5814 | ret = LTTNG_ERR_INVALID; | |
259c2674 | 5815 | goto end; |
66ea93b1 JG |
5816 | } |
5817 | ||
5818 | /* Improper use of the API. */ | |
5819 | if (new_value == -1ULL) { | |
5820 | WARN("Failing ROTATION_SET_SCHEDULE command as the value requested is -1"); | |
5821 | ret = LTTNG_ERR_INVALID; | |
259c2674 JD |
5822 | goto end; |
5823 | } | |
5824 | ||
66ea93b1 JG |
5825 | /* |
5826 | * As indicated in struct ltt_session's comments, a value of == 0 means | |
5827 | * this schedule rotation type is not in use. | |
5828 | * | |
5829 | * Reject the command if we were asked to activate a schedule that was | |
5830 | * already active. | |
5831 | */ | |
5832 | if (activate && *parameter_value != 0) { | |
5833 | DBG("Failing ROTATION_SET_SCHEDULE (activate) command as the schedule is already active"); | |
5834 | ret = LTTNG_ERR_ROTATION_SCHEDULE_SET; | |
90936dcf | 5835 | goto end; |
66ea93b1 JG |
5836 | } |
5837 | ||
5838 | /* | |
5839 | * Reject the command if we were asked to deactivate a schedule that was | |
5840 | * not active. | |
5841 | */ | |
5842 | if (!activate && *parameter_value == 0) { | |
5843 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as the schedule is already inactive"); | |
5844 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
90936dcf JD |
5845 | goto end; |
5846 | } | |
5847 | ||
66ea93b1 JG |
5848 | /* |
5849 | * Reject the command if we were asked to deactivate a schedule that | |
5850 | * doesn't exist. | |
5851 | */ | |
5852 | if (!activate && *parameter_value != new_value) { | |
5853 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as an inexistant schedule was provided"); | |
5854 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
5855 | goto end; | |
5856 | } | |
259c2674 | 5857 | |
66ea93b1 JG |
5858 | *parameter_value = activate ? new_value : 0; |
5859 | ||
5860 | switch (schedule_type) { | |
5861 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5862 | if (activate && session->active) { | |
5863 | /* | |
5864 | * Only start the timer if the session is active, | |
5865 | * otherwise it will be started when the session starts. | |
5866 | */ | |
28ab034a | 5867 | ret = timer_session_rotation_schedule_timer_start(session, new_value); |
259c2674 | 5868 | if (ret) { |
66ea93b1 | 5869 | ERR("Failed to enable session rotation timer in ROTATION_SET_SCHEDULE command"); |
259c2674 JD |
5870 | ret = LTTNG_ERR_UNK; |
5871 | goto end; | |
5872 | } | |
66ea93b1 | 5873 | } else { |
28ab034a | 5874 | ret = timer_session_rotation_schedule_timer_stop(session); |
66ea93b1 JG |
5875 | if (ret) { |
5876 | ERR("Failed to disable session rotation timer in ROTATION_SET_SCHEDULE command"); | |
5877 | ret = LTTNG_ERR_UNK; | |
f3ce6946 | 5878 | goto end; |
66ea93b1 | 5879 | } |
259c2674 | 5880 | } |
66ea93b1 JG |
5881 | break; |
5882 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5883 | if (activate) { | |
0038180d JG |
5884 | try { |
5885 | the_rotation_thread_handle->subscribe_session_consumed_size_rotation( | |
5886 | *session, new_value); | |
5b9eda8a | 5887 | } catch (const std::exception& e) { |
0038180d JG |
5888 | ERR("Failed to enable consumed-size notification in ROTATION_SET_SCHEDULE command: %s", |
5889 | e.what()); | |
90936dcf JD |
5890 | ret = LTTNG_ERR_UNK; |
5891 | goto end; | |
5892 | } | |
90936dcf | 5893 | } else { |
0038180d JG |
5894 | try { |
5895 | the_rotation_thread_handle | |
5896 | ->unsubscribe_session_consumed_size_rotation(*session); | |
5b9eda8a | 5897 | } catch (const std::exception& e) { |
0038180d JG |
5898 | ERR("Failed to disable consumed-size notification in ROTATION_SET_SCHEDULE command: %s", |
5899 | e.what()); | |
90936dcf JD |
5900 | ret = LTTNG_ERR_UNK; |
5901 | goto end; | |
5902 | } | |
90936dcf | 5903 | } |
66ea93b1 JG |
5904 | break; |
5905 | default: | |
5906 | /* Would have been caught before. */ | |
5907 | abort(); | |
90936dcf JD |
5908 | } |
5909 | ||
259c2674 JD |
5910 | ret = LTTNG_OK; |
5911 | ||
5912 | goto end; | |
5913 | ||
5914 | end: | |
5915 | return ret; | |
5916 | } | |
5917 | ||
a503e1ef JG |
5918 | /* Wait for a given path to be removed before continuing. */ |
5919 | static enum lttng_error_code wait_on_path(void *path_data) | |
5920 | { | |
7966af57 | 5921 | const char *shm_path = (const char *) path_data; |
a503e1ef JG |
5922 | |
5923 | DBG("Waiting for the shm path at %s to be removed before completing session destruction", | |
28ab034a | 5924 | shm_path); |
a503e1ef JG |
5925 | while (true) { |
5926 | int ret; | |
5927 | struct stat st; | |
5928 | ||
5929 | ret = stat(shm_path, &st); | |
5930 | if (ret) { | |
5931 | if (errno != ENOENT) { | |
5932 | PERROR("stat() returned an error while checking for the existence of the shm path"); | |
5933 | } else { | |
5934 | DBG("shm path no longer exists, completing the destruction of session"); | |
5935 | } | |
5936 | break; | |
5937 | } else { | |
5938 | if (!S_ISDIR(st.st_mode)) { | |
5939 | ERR("The type of shm path %s returned by stat() is not a directory; aborting the wait for shm path removal", | |
28ab034a | 5940 | shm_path); |
a503e1ef JG |
5941 | break; |
5942 | } | |
5943 | } | |
5944 | usleep(SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US); | |
5945 | } | |
5946 | return LTTNG_OK; | |
5947 | } | |
5948 | ||
5949 | /* | |
5950 | * Returns a pointer to a handler to run on completion of a command. | |
5951 | * Returns NULL if no handler has to be run for the last command executed. | |
5952 | */ | |
cd9adb8b | 5953 | const struct cmd_completion_handler *cmd_pop_completion_handler() |
a503e1ef JG |
5954 | { |
5955 | struct cmd_completion_handler *handler = current_completion_handler; | |
5956 | ||
cd9adb8b | 5957 | current_completion_handler = nullptr; |
a503e1ef JG |
5958 | return handler; |
5959 | } | |
5960 | ||
2f77fc4b DG |
5961 | /* |
5962 | * Init command subsystem. | |
5963 | */ | |
cd9adb8b | 5964 | void cmd_init() |
2f77fc4b DG |
5965 | { |
5966 | /* | |
d88aee68 DG |
5967 | * Set network sequence index to 1 for streams to match a relayd |
5968 | * socket on the consumer side. | |
2f77fc4b | 5969 | */ |
d88aee68 DG |
5970 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
5971 | relayd_net_seq_idx = 1; | |
5972 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
5973 | |
5974 | DBG("Command subsystem initialized"); | |
5975 | } |