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 | ||
f953b297 JG |
9 | #include "bin/lttng-sessiond/tracker.h" |
10 | #include "lttng/lttng-error.h" | |
11 | #include "lttng/tracker.h" | |
6c1c0768 | 12 | #define _LGPL_SOURCE |
2f77fc4b | 13 | #include <assert.h> |
6dc3064a | 14 | #include <inttypes.h> |
2f77fc4b DG |
15 | #include <urcu/list.h> |
16 | #include <urcu/uatomic.h> | |
a503e1ef | 17 | #include <sys/stat.h> |
d2956687 | 18 | #include <stdio.h> |
2f77fc4b | 19 | |
166fc586 | 20 | #include <common/buffer-view.h> |
2f77fc4b | 21 | #include <common/common.h> |
f5436bfc | 22 | #include <common/compat/string.h> |
166fc586 | 23 | #include <common/defaults.h> |
b0880ae5 | 24 | #include <common/dynamic-buffer.h> |
166fc586 JR |
25 | #include <common/kernel-ctl/kernel-ctl.h> |
26 | #include <common/relayd/relayd.h> | |
27 | #include <common/sessiond-comm/sessiond-comm.h> | |
28 | #include <common/string-utils/string-utils.h> | |
82b69413 | 29 | #include <common/trace-chunk.h> |
166fc586 | 30 | #include <common/utils.h> |
b0880ae5 JG |
31 | #include <lttng/action/action.h> |
32 | #include <lttng/channel-internal.h> | |
166fc586 JR |
33 | #include <lttng/channel.h> |
34 | #include <lttng/condition/condition.h> | |
35 | #include <lttng/event-internal.h> | |
17dd1232 | 36 | #include <lttng/location-internal.h> |
166fc586 JR |
37 | #include <lttng/rotate-internal.h> |
38 | #include <lttng/session-descriptor-internal.h> | |
b178f53e | 39 | #include <lttng/session-internal.h> |
166fc586 | 40 | #include <lttng/trigger/trigger-internal.h> |
3c02e545 | 41 | #include <lttng/userspace-probe-internal.h> |
2f77fc4b DG |
42 | |
43 | #include "channel.h" | |
44 | #include "consumer.h" | |
45 | #include "event.h" | |
8782cc74 | 46 | #include "health-sessiond.h" |
2f77fc4b DG |
47 | #include "kernel.h" |
48 | #include "kernel-consumer.h" | |
49 | #include "lttng-sessiond.h" | |
50 | #include "utils.h" | |
0dbc2034 | 51 | #include "lttng-syscall.h" |
7c1d2758 | 52 | #include "agent.h" |
93ec662e | 53 | #include "buffer-registry.h" |
b0880ae5 JG |
54 | #include "notification-thread.h" |
55 | #include "notification-thread-commands.h" | |
5c408ad8 JD |
56 | #include "rotate.h" |
57 | #include "rotation-thread.h" | |
8e319828 | 58 | #include "timer.h" |
f28f9e44 | 59 | #include "agent-thread.h" |
2f77fc4b DG |
60 | |
61 | #include "cmd.h" | |
62 | ||
a503e1ef JG |
63 | /* Sleep for 100ms between each check for the shm path's deletion. */ |
64 | #define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000 | |
65 | ||
3e3665b8 JG |
66 | struct cmd_destroy_session_reply_context { |
67 | int reply_sock_fd; | |
68 | bool implicit_rotation_on_destroy; | |
3285a971 JG |
69 | /* |
70 | * Indicates whether or not an error occurred while launching the | |
71 | * destruction of a session. | |
72 | */ | |
73 | enum lttng_error_code destruction_status; | |
3e3665b8 JG |
74 | }; |
75 | ||
a503e1ef JG |
76 | static enum lttng_error_code wait_on_path(void *path); |
77 | ||
78 | /* | |
79 | * Command completion handler that is used by the destroy command | |
80 | * when a session that has a non-default shm_path is being destroyed. | |
81 | * | |
82 | * See comment in cmd_destroy_session() for the rationale. | |
83 | */ | |
84 | static struct destroy_completion_handler { | |
85 | struct cmd_completion_handler handler; | |
86 | char shm_path[member_sizeof(struct ltt_session, shm_path)]; | |
87 | } destroy_completion_handler = { | |
88 | .handler = { | |
89 | .run = wait_on_path, | |
90 | .data = destroy_completion_handler.shm_path | |
91 | }, | |
92 | .shm_path = { 0 }, | |
93 | }; | |
94 | ||
95 | static struct cmd_completion_handler *current_completion_handler; | |
96 | ||
2f77fc4b DG |
97 | /* |
98 | * Used to keep a unique index for each relayd socket created where this value | |
99 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
100 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
101 | * held. | |
2f77fc4b | 102 | */ |
d88aee68 DG |
103 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
104 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 105 | |
7076b56e JG |
106 | static int validate_ust_event_name(const char *); |
107 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 108 | const struct lttng_domain *domain, |
7076b56e JG |
109 | char *channel_name, struct lttng_event *event, |
110 | char *filter_expression, | |
111 | struct lttng_filter_bytecode *filter, | |
112 | struct lttng_event_exclusion *exclusion, | |
113 | int wpipe); | |
33b9609d JR |
114 | static int cmd_enable_channel_internal(struct ltt_session *session, |
115 | const struct lttng_domain *domain, | |
116 | const struct lttng_channel *_attr, | |
117 | int wpipe); | |
7076b56e | 118 | |
2f77fc4b DG |
119 | /* |
120 | * Create a session path used by list_lttng_sessions for the case that the | |
121 | * session consumer is on the network. | |
122 | */ | |
123 | static int build_network_session_path(char *dst, size_t size, | |
124 | struct ltt_session *session) | |
125 | { | |
126 | int ret, kdata_port, udata_port; | |
127 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
128 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
129 | ||
130 | assert(session); | |
131 | assert(dst); | |
132 | ||
133 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
134 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
135 | ||
136 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
137 | ||
138 | if (session->kernel_session && session->kernel_session->consumer) { | |
139 | kuri = &session->kernel_session->consumer->dst.net.control; | |
140 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
141 | } | |
142 | ||
143 | if (session->ust_session && session->ust_session->consumer) { | |
144 | uuri = &session->ust_session->consumer->dst.net.control; | |
145 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
146 | } | |
147 | ||
148 | if (uuri == NULL && kuri == NULL) { | |
149 | uri = &session->consumer->dst.net.control; | |
150 | kdata_port = session->consumer->dst.net.data.port; | |
151 | } else if (kuri && uuri) { | |
152 | ret = uri_compare(kuri, uuri); | |
153 | if (ret) { | |
154 | /* Not Equal */ | |
155 | uri = kuri; | |
156 | /* Build uuri URL string */ | |
157 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
158 | if (ret < 0) { | |
159 | goto error; | |
160 | } | |
161 | } else { | |
162 | uri = kuri; | |
163 | } | |
164 | } else if (kuri && uuri == NULL) { | |
165 | uri = kuri; | |
166 | } else if (uuri && kuri == NULL) { | |
167 | uri = uuri; | |
168 | } | |
169 | ||
170 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
171 | if (ret < 0) { | |
172 | goto error; | |
173 | } | |
174 | ||
9aa9f900 DG |
175 | /* |
176 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
177 | * to print. | |
178 | */ | |
9d035200 | 179 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
180 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
181 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
182 | } else { | |
9aa9f900 | 183 | int dport; |
bef08707 | 184 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
185 | dport = kdata_port; |
186 | } else { | |
187 | /* No kernel URI, use the UST port. */ | |
188 | dport = udata_port; | |
189 | } | |
190 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
191 | } |
192 | ||
193 | error: | |
194 | return ret; | |
195 | } | |
196 | ||
fb83fe64 JD |
197 | /* |
198 | * Get run-time attributes if the session has been started (discarded events, | |
199 | * lost packets). | |
200 | */ | |
201 | static int get_kernel_runtime_stats(struct ltt_session *session, | |
202 | struct ltt_kernel_channel *kchan, uint64_t *discarded_events, | |
203 | uint64_t *lost_packets) | |
204 | { | |
205 | int ret; | |
206 | ||
207 | if (!session->has_been_started) { | |
208 | ret = 0; | |
209 | *discarded_events = 0; | |
210 | *lost_packets = 0; | |
211 | goto end; | |
212 | } | |
213 | ||
e1f3997a | 214 | ret = consumer_get_discarded_events(session->id, kchan->key, |
fb83fe64 JD |
215 | session->kernel_session->consumer, |
216 | discarded_events); | |
217 | if (ret < 0) { | |
218 | goto end; | |
219 | } | |
220 | ||
e1f3997a | 221 | ret = consumer_get_lost_packets(session->id, kchan->key, |
fb83fe64 JD |
222 | session->kernel_session->consumer, |
223 | lost_packets); | |
224 | if (ret < 0) { | |
225 | goto end; | |
226 | } | |
227 | ||
228 | end: | |
229 | return ret; | |
230 | } | |
231 | ||
232 | /* | |
233 | * Get run-time attributes if the session has been started (discarded events, | |
234 | * lost packets). | |
235 | */ | |
236 | static int get_ust_runtime_stats(struct ltt_session *session, | |
237 | struct ltt_ust_channel *uchan, uint64_t *discarded_events, | |
238 | uint64_t *lost_packets) | |
239 | { | |
240 | int ret; | |
241 | struct ltt_ust_session *usess; | |
242 | ||
a91c5803 JG |
243 | if (!discarded_events || !lost_packets) { |
244 | ret = -1; | |
245 | goto end; | |
246 | } | |
247 | ||
fb83fe64 | 248 | usess = session->ust_session; |
a905c624 JG |
249 | assert(discarded_events); |
250 | assert(lost_packets); | |
fb83fe64 JD |
251 | |
252 | if (!usess || !session->has_been_started) { | |
253 | *discarded_events = 0; | |
254 | *lost_packets = 0; | |
255 | ret = 0; | |
256 | goto end; | |
257 | } | |
258 | ||
259 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
260 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
261 | &usess->buffer_reg_uid_list, | |
262 | usess->consumer, uchan->id, | |
263 | uchan->attr.overwrite, | |
264 | discarded_events, | |
265 | lost_packets); | |
266 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { | |
267 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
268 | uchan, usess->consumer, | |
269 | uchan->attr.overwrite, | |
270 | discarded_events, | |
271 | lost_packets); | |
272 | if (ret < 0) { | |
273 | goto end; | |
274 | } | |
275 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
276 | *lost_packets += uchan->per_pid_closed_app_lost; | |
277 | } else { | |
278 | ERR("Unsupported buffer type"); | |
967bc289 | 279 | assert(0); |
fb83fe64 JD |
280 | ret = -1; |
281 | goto end; | |
282 | } | |
283 | ||
284 | end: | |
285 | return ret; | |
286 | } | |
287 | ||
3c6a091f | 288 | /* |
022d91ba | 289 | * Create a list of agent domain events. |
3c6a091f DG |
290 | * |
291 | * Return number of events in list on success or else a negative value. | |
292 | */ | |
166fc586 JR |
293 | static enum lttng_error_code list_lttng_agent_events( |
294 | struct agent *agt, struct lttng_dynamic_buffer *buffer, | |
295 | unsigned int *nb_events) | |
3c6a091f | 296 | { |
166fc586 JR |
297 | enum lttng_error_code ret_code; |
298 | int ret = 0; | |
299 | unsigned int local_nb_events = 0; | |
022d91ba | 300 | struct agent_event *event; |
3c6a091f | 301 | struct lttng_ht_iter iter; |
166fc586 | 302 | unsigned long tmp; |
3c6a091f | 303 | |
022d91ba | 304 | assert(agt); |
166fc586 | 305 | assert(buffer); |
3c6a091f | 306 | |
022d91ba | 307 | DBG3("Listing agent events"); |
3c6a091f | 308 | |
e5bbf678 | 309 | rcu_read_lock(); |
166fc586 JR |
310 | tmp = lttng_ht_get_count(agt->events); |
311 | if (tmp == 0) { | |
312 | /* Early exit. */ | |
313 | goto end; | |
314 | } | |
315 | ||
316 | if (tmp > UINT_MAX) { | |
317 | ret_code = LTTNG_ERR_OVERFLOW; | |
3c6a091f DG |
318 | goto error; |
319 | } | |
320 | ||
166fc586 | 321 | local_nb_events = (unsigned int) tmp; |
b4e3ceb9 | 322 | |
b4e3ceb9 | 323 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
166fc586 JR |
324 | struct lttng_event *tmp = lttng_event_create(); |
325 | ||
326 | if (!tmp) { | |
327 | ret_code = LTTNG_ERR_NOMEM; | |
3c02e545 FD |
328 | goto error; |
329 | } | |
b4e3ceb9 | 330 | |
166fc586 JR |
331 | if(lttng_strncpy(tmp->name, event->name, sizeof(tmp->name))) { |
332 | lttng_event_destroy(tmp); | |
333 | ret_code = LTTNG_ERR_FATAL; | |
334 | goto error; | |
335 | } | |
336 | ||
337 | tmp->name[sizeof(tmp->name) - 1] = '\0'; | |
338 | tmp->enabled = event->enabled; | |
339 | tmp->loglevel = event->loglevel_value; | |
340 | tmp->loglevel_type = event->loglevel_type; | |
b4e3ceb9 | 341 | |
166fc586 JR |
342 | ret = lttng_event_serialize(tmp, 0, NULL, |
343 | event->filter_expression, 0, NULL, buffer, | |
344 | NULL); | |
345 | lttng_event_destroy(tmp); | |
3c02e545 | 346 | if (ret) { |
166fc586 | 347 | ret_code = LTTNG_ERR_FATAL; |
3c02e545 FD |
348 | goto error; |
349 | } | |
3c6a091f | 350 | } |
3c6a091f | 351 | |
47e52862 | 352 | end: |
166fc586 JR |
353 | ret_code = LTTNG_OK; |
354 | *nb_events = local_nb_events; | |
47e52862 | 355 | error: |
166fc586 JR |
356 | rcu_read_unlock(); |
357 | return ret_code; | |
3c6a091f DG |
358 | } |
359 | ||
2f77fc4b DG |
360 | /* |
361 | * Create a list of ust global domain events. | |
362 | */ | |
166fc586 | 363 | static enum lttng_error_code list_lttng_ust_global_events(char *channel_name, |
b4e3ceb9 | 364 | struct ltt_ust_domain_global *ust_global, |
166fc586 JR |
365 | struct lttng_dynamic_buffer *buffer, |
366 | unsigned int *nb_events) | |
2f77fc4b | 367 | { |
166fc586 JR |
368 | enum lttng_error_code ret_code; |
369 | int ret; | |
2f77fc4b DG |
370 | struct lttng_ht_iter iter; |
371 | struct lttng_ht_node_str *node; | |
372 | struct ltt_ust_channel *uchan; | |
373 | struct ltt_ust_event *uevent; | |
166fc586 JR |
374 | unsigned long tmp; |
375 | unsigned int local_nb_events = 0; | |
376 | char **exclusion_list = NULL; | |
377 | uint32_t i; | |
378 | ||
379 | assert(buffer); | |
380 | assert(nb_events); | |
2f77fc4b DG |
381 | |
382 | DBG("Listing UST global events for channel %s", channel_name); | |
383 | ||
384 | rcu_read_lock(); | |
385 | ||
386 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
387 | node = lttng_ht_iter_get_node_str(&iter); | |
388 | if (node == NULL) { | |
166fc586 | 389 | ret_code = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
d31d3e8c | 390 | goto end; |
2f77fc4b DG |
391 | } |
392 | ||
393 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
394 | ||
166fc586 JR |
395 | tmp = lttng_ht_get_count(uchan->events); |
396 | if (tmp == 0) { | |
397 | /* Early exit. */ | |
398 | ret_code = LTTNG_OK; | |
d31d3e8c | 399 | goto end; |
2f77fc4b DG |
400 | } |
401 | ||
166fc586 JR |
402 | if (tmp > UINT_MAX) { |
403 | ret_code = LTTNG_ERR_OVERFLOW; | |
404 | goto error; | |
405 | } | |
406 | ||
407 | local_nb_events = (unsigned int) tmp; | |
408 | ||
409 | DBG3("Listing UST global %d events", *nb_events); | |
2f77fc4b | 410 | |
b4e3ceb9 | 411 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
166fc586 JR |
412 | struct lttng_event *tmp = NULL; |
413 | ||
b4e3ceb9 | 414 | if (uevent->internal) { |
166fc586 JR |
415 | /* This event should remain hidden from clients */ |
416 | local_nb_events--; | |
b4e3ceb9 PP |
417 | continue; |
418 | } | |
419 | ||
166fc586 JR |
420 | /* Prepare exclusion list. */ |
421 | if (uevent->exclusion && uevent->exclusion->count > 0) { | |
422 | exclusion_list = zmalloc(sizeof(char *) * uevent->exclusion->count); | |
423 | if (!exclusion_list) { | |
424 | goto end; | |
425 | } | |
426 | for (i = 0; i < uevent->exclusion->count; i++) { | |
427 | exclusion_list[i] = (char *) &(uevent->exclusion->names[i]); | |
428 | } | |
3c02e545 | 429 | } |
2f77fc4b | 430 | |
166fc586 JR |
431 | tmp = lttng_event_create(); |
432 | if (!tmp) { | |
433 | ret_code = LTTNG_ERR_NOMEM; | |
434 | goto end; | |
435 | } | |
b4e3ceb9 | 436 | |
166fc586 JR |
437 | if (lttng_strncpy(tmp->name, uevent->attr.name, |
438 | LTTNG_SYMBOL_NAME_LEN)) { | |
439 | ret_code = LTTNG_ERR_FATAL; | |
440 | lttng_event_destroy(tmp); | |
441 | goto end; | |
3c442be3 | 442 | } |
166fc586 JR |
443 | |
444 | tmp->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
445 | tmp->enabled = uevent->enabled; | |
2f77fc4b DG |
446 | |
447 | switch (uevent->attr.instrumentation) { | |
448 | case LTTNG_UST_TRACEPOINT: | |
166fc586 | 449 | tmp->type = LTTNG_EVENT_TRACEPOINT; |
2f77fc4b DG |
450 | break; |
451 | case LTTNG_UST_PROBE: | |
166fc586 | 452 | tmp->type = LTTNG_EVENT_PROBE; |
2f77fc4b DG |
453 | break; |
454 | case LTTNG_UST_FUNCTION: | |
166fc586 | 455 | tmp->type = LTTNG_EVENT_FUNCTION; |
2f77fc4b DG |
456 | break; |
457 | } | |
458 | ||
166fc586 | 459 | tmp->loglevel = uevent->attr.loglevel; |
2f77fc4b DG |
460 | switch (uevent->attr.loglevel_type) { |
461 | case LTTNG_UST_LOGLEVEL_ALL: | |
166fc586 | 462 | tmp->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
2f77fc4b DG |
463 | break; |
464 | case LTTNG_UST_LOGLEVEL_RANGE: | |
166fc586 | 465 | tmp->loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
2f77fc4b DG |
466 | break; |
467 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
166fc586 | 468 | tmp->loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
2f77fc4b DG |
469 | break; |
470 | } | |
471 | if (uevent->filter) { | |
166fc586 | 472 | tmp->filter = 1; |
2f77fc4b | 473 | } |
4634f12e | 474 | if (uevent->exclusion) { |
166fc586 | 475 | tmp->exclusion = 1; |
4634f12e | 476 | } |
b4e3ceb9 | 477 | |
166fc586 JR |
478 | /* |
479 | * We do not care about the filter bytecode and the fd from the | |
480 | * userspace_probe_location. | |
481 | */ | |
482 | ret = lttng_event_serialize(tmp, | |
483 | exclusion_list ? uevent->exclusion->count : 0, | |
484 | exclusion_list, uevent->filter_expression, 0, | |
485 | NULL, buffer, NULL); | |
486 | lttng_event_destroy(tmp); | |
487 | free(exclusion_list); | |
488 | exclusion_list = NULL; | |
3c02e545 | 489 | if (ret) { |
166fc586 JR |
490 | ret_code = LTTNG_ERR_FATAL; |
491 | goto error; | |
3c02e545 | 492 | } |
2f77fc4b DG |
493 | } |
494 | ||
d31d3e8c | 495 | end: |
166fc586 JR |
496 | /* nb_events is already set at this point. */ |
497 | ret_code = LTTNG_OK; | |
498 | *nb_events = local_nb_events; | |
499 | error: | |
500 | free(exclusion_list); | |
2f77fc4b | 501 | rcu_read_unlock(); |
166fc586 | 502 | return ret_code; |
2f77fc4b DG |
503 | } |
504 | ||
505 | /* | |
506 | * Fill lttng_event array of all kernel events in the channel. | |
507 | */ | |
166fc586 | 508 | static enum lttng_error_code list_lttng_kernel_events(char *channel_name, |
b4e3ceb9 | 509 | struct ltt_kernel_session *kernel_session, |
166fc586 JR |
510 | struct lttng_dynamic_buffer *payload, |
511 | unsigned int *nb_events) | |
2f77fc4b | 512 | { |
166fc586 JR |
513 | enum lttng_error_code ret_code; |
514 | int ret; | |
2f77fc4b DG |
515 | struct ltt_kernel_event *event; |
516 | struct ltt_kernel_channel *kchan; | |
166fc586 JR |
517 | |
518 | assert(payload); | |
2f77fc4b DG |
519 | |
520 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
521 | if (kchan == NULL) { | |
166fc586 JR |
522 | ret_code = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
523 | goto end; | |
2f77fc4b DG |
524 | } |
525 | ||
166fc586 | 526 | *nb_events = kchan->event_count; |
2f77fc4b DG |
527 | |
528 | DBG("Listing events for channel %s", kchan->channel->name); | |
529 | ||
166fc586 JR |
530 | if (*nb_events == 0) { |
531 | ret_code = LTTNG_OK; | |
db906c12 | 532 | goto end; |
2f77fc4b DG |
533 | } |
534 | ||
166fc586 JR |
535 | /* Kernel channels */ |
536 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
537 | struct lttng_event *tmp = lttng_event_create(); | |
538 | ||
539 | if (!tmp) { | |
540 | ret_code = LTTNG_ERR_NOMEM; | |
541 | goto end; | |
3c02e545 | 542 | } |
b4e3ceb9 | 543 | |
166fc586 JR |
544 | if (lttng_strncpy(tmp->name, event->event->name, LTTNG_SYMBOL_NAME_LEN)) { |
545 | lttng_event_destroy(tmp); | |
546 | ret_code = LTTNG_ERR_FATAL; | |
547 | goto end; | |
2f77fc4b | 548 | |
166fc586 | 549 | } |
b4e3ceb9 | 550 | |
166fc586 JR |
551 | tmp->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
552 | tmp->enabled = event->enabled; | |
553 | tmp->filter = (unsigned char) !!event->filter_expression; | |
2f77fc4b DG |
554 | |
555 | switch (event->event->instrumentation) { | |
556 | case LTTNG_KERNEL_TRACEPOINT: | |
166fc586 | 557 | tmp->type = LTTNG_EVENT_TRACEPOINT; |
2f77fc4b | 558 | break; |
2f77fc4b | 559 | case LTTNG_KERNEL_KRETPROBE: |
166fc586 JR |
560 | tmp->type = LTTNG_EVENT_FUNCTION; |
561 | memcpy(&tmp->attr.probe, &event->event->u.kprobe, | |
1896972b DG |
562 | sizeof(struct lttng_kernel_kprobe)); |
563 | break; | |
564 | case LTTNG_KERNEL_KPROBE: | |
166fc586 JR |
565 | tmp->type = LTTNG_EVENT_PROBE; |
566 | memcpy(&tmp->attr.probe, &event->event->u.kprobe, | |
2f77fc4b DG |
567 | sizeof(struct lttng_kernel_kprobe)); |
568 | break; | |
b955b4d4 | 569 | case LTTNG_KERNEL_UPROBE: |
166fc586 | 570 | tmp->type = LTTNG_EVENT_USERSPACE_PROBE; |
b955b4d4 | 571 | break; |
2f77fc4b | 572 | case LTTNG_KERNEL_FUNCTION: |
166fc586 JR |
573 | tmp->type = LTTNG_EVENT_FUNCTION; |
574 | memcpy(&(tmp->attr.ftrace), &event->event->u.ftrace, | |
2f77fc4b DG |
575 | sizeof(struct lttng_kernel_function)); |
576 | break; | |
577 | case LTTNG_KERNEL_NOOP: | |
166fc586 | 578 | tmp->type = LTTNG_EVENT_NOOP; |
2f77fc4b DG |
579 | break; |
580 | case LTTNG_KERNEL_SYSCALL: | |
166fc586 | 581 | tmp->type = LTTNG_EVENT_SYSCALL; |
2f77fc4b DG |
582 | break; |
583 | case LTTNG_KERNEL_ALL: | |
1ab8c2ad FD |
584 | /* fall-through. */ |
585 | default: | |
2f77fc4b DG |
586 | assert(0); |
587 | break; | |
588 | } | |
b4e3ceb9 | 589 | |
166fc586 JR |
590 | if (event->userspace_probe_location) { |
591 | struct lttng_userspace_probe_location *location_copy = | |
592 | lttng_userspace_probe_location_copy( | |
593 | event->userspace_probe_location); | |
594 | if (!location_copy) { | |
595 | lttng_event_destroy(tmp); | |
596 | ret_code = LTTNG_ERR_NOMEM; | |
597 | goto end; | |
598 | } | |
599 | ret = lttng_event_set_userspace_probe_location( | |
600 | tmp, location_copy); | |
601 | if (ret) { | |
602 | lttng_event_destroy(tmp); | |
603 | lttng_userspace_probe_location_destroy( | |
604 | location_copy); | |
605 | ret_code = LTTNG_ERR_INVALID; | |
606 | goto end; | |
607 | } | |
608 | } | |
609 | ||
610 | ret = lttng_event_serialize(tmp, 0, NULL, | |
611 | event->filter_expression, 0, NULL, payload, | |
612 | NULL); | |
613 | lttng_event_destroy(tmp); | |
3c02e545 | 614 | if (ret) { |
166fc586 JR |
615 | ret_code = LTTNG_ERR_FATAL; |
616 | goto end; | |
3c02e545 | 617 | } |
2f77fc4b DG |
618 | } |
619 | ||
166fc586 | 620 | ret_code = LTTNG_OK; |
db906c12 | 621 | end: |
166fc586 | 622 | return ret_code; |
2f77fc4b DG |
623 | } |
624 | ||
625 | /* | |
626 | * Add URI so the consumer output object. Set the correct path depending on the | |
627 | * domain adding the default trace directory. | |
628 | */ | |
b178f53e JG |
629 | static enum lttng_error_code add_uri_to_consumer( |
630 | const struct ltt_session *session, | |
631 | struct consumer_output *consumer, | |
632 | struct lttng_uri *uri, enum lttng_domain_type domain) | |
2f77fc4b | 633 | { |
b178f53e JG |
634 | int ret; |
635 | enum lttng_error_code ret_code = LTTNG_OK; | |
2f77fc4b DG |
636 | |
637 | assert(uri); | |
638 | ||
639 | if (consumer == NULL) { | |
640 | DBG("No consumer detected. Don't add URI. Stopping."); | |
b178f53e | 641 | ret_code = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
642 | goto error; |
643 | } | |
644 | ||
645 | switch (domain) { | |
646 | case LTTNG_DOMAIN_KERNEL: | |
b178f53e JG |
647 | ret = lttng_strncpy(consumer->domain_subdir, |
648 | DEFAULT_KERNEL_TRACE_DIR, | |
649 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
650 | break; |
651 | case LTTNG_DOMAIN_UST: | |
b178f53e JG |
652 | ret = lttng_strncpy(consumer->domain_subdir, |
653 | DEFAULT_UST_TRACE_DIR, | |
654 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
655 | break; |
656 | default: | |
657 | /* | |
b178f53e JG |
658 | * This case is possible is we try to add the URI to the global |
659 | * tracing session consumer object which in this case there is | |
660 | * no subdir. | |
2f77fc4b | 661 | */ |
b178f53e JG |
662 | memset(consumer->domain_subdir, 0, |
663 | sizeof(consumer->domain_subdir)); | |
664 | ret = 0; | |
665 | } | |
666 | if (ret) { | |
667 | ERR("Failed to initialize consumer output domain subdirectory"); | |
668 | ret_code = LTTNG_ERR_FATAL; | |
669 | goto error; | |
2f77fc4b DG |
670 | } |
671 | ||
672 | switch (uri->dtype) { | |
673 | case LTTNG_DST_IPV4: | |
674 | case LTTNG_DST_IPV6: | |
675 | DBG2("Setting network URI to consumer"); | |
676 | ||
df75acac DG |
677 | if (consumer->type == CONSUMER_DST_NET) { |
678 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
679 | consumer->dst.net.control_isset) || |
680 | (uri->stype == LTTNG_STREAM_DATA && | |
681 | consumer->dst.net.data_isset)) { | |
b178f53e | 682 | ret_code = LTTNG_ERR_URL_EXIST; |
df75acac DG |
683 | goto error; |
684 | } | |
685 | } else { | |
b178f53e | 686 | memset(&consumer->dst, 0, sizeof(consumer->dst)); |
785d2d0d DG |
687 | } |
688 | ||
2f77fc4b | 689 | /* Set URI into consumer output object */ |
b178f53e | 690 | ret = consumer_set_network_uri(session, consumer, uri); |
2f77fc4b | 691 | if (ret < 0) { |
b178f53e | 692 | ret_code = -ret; |
2f77fc4b DG |
693 | goto error; |
694 | } else if (ret == 1) { | |
695 | /* | |
696 | * URI was the same in the consumer so we do not append the subdir | |
697 | * again so to not duplicate output dir. | |
698 | */ | |
b178f53e | 699 | ret_code = LTTNG_OK; |
2f77fc4b DG |
700 | goto error; |
701 | } | |
2f77fc4b DG |
702 | break; |
703 | case LTTNG_DST_PATH: | |
b178f53e JG |
704 | if (*uri->dst.path != '/' || strstr(uri->dst.path, "../")) { |
705 | ret_code = LTTNG_ERR_INVALID; | |
9ac05d92 MD |
706 | goto error; |
707 | } | |
b178f53e JG |
708 | DBG2("Setting trace directory path from URI to %s", |
709 | uri->dst.path); | |
710 | memset(&consumer->dst, 0, sizeof(consumer->dst)); | |
711 | ||
712 | ret = lttng_strncpy(consumer->dst.session_root_path, | |
713 | uri->dst.path, | |
714 | sizeof(consumer->dst.session_root_path)); | |
4df41cad JG |
715 | if (ret) { |
716 | ret_code = LTTNG_ERR_FATAL; | |
717 | goto error; | |
718 | } | |
2f77fc4b DG |
719 | consumer->type = CONSUMER_DST_LOCAL; |
720 | break; | |
721 | } | |
722 | ||
b178f53e | 723 | ret_code = LTTNG_OK; |
2f77fc4b | 724 | error: |
b178f53e | 725 | return ret_code; |
2f77fc4b DG |
726 | } |
727 | ||
728 | /* | |
729 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
730 | */ | |
731 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
732 | { | |
733 | int ret = 0; | |
734 | struct lttng_ht_iter iter; | |
735 | struct consumer_socket *socket; | |
736 | ||
737 | assert(session); | |
738 | ||
e7fe706f DG |
739 | rcu_read_lock(); |
740 | ||
2f77fc4b DG |
741 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
742 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
743 | socket, node.node) { | |
2f77fc4b | 744 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 745 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
746 | pthread_mutex_unlock(socket->lock); |
747 | if (ret < 0) { | |
f73fabfd | 748 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
749 | goto error; |
750 | } | |
751 | } | |
752 | } | |
753 | ||
754 | error: | |
e7fe706f | 755 | rcu_read_unlock(); |
2f77fc4b DG |
756 | return ret; |
757 | } | |
758 | ||
759 | /* | |
760 | * Create a socket to the relayd using the URI. | |
761 | * | |
762 | * On success, the relayd_sock pointer is set to the created socket. | |
9a654598 | 763 | * Else, it remains untouched and an LTTng error code is returned. |
2f77fc4b | 764 | */ |
9a654598 | 765 | static enum lttng_error_code create_connect_relayd(struct lttng_uri *uri, |
b31610f2 JD |
766 | struct lttcomm_relayd_sock **relayd_sock, |
767 | struct consumer_output *consumer) | |
2f77fc4b DG |
768 | { |
769 | int ret; | |
9a654598 | 770 | enum lttng_error_code status = LTTNG_OK; |
6151a90f | 771 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 772 | |
6151a90f JD |
773 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
774 | RELAYD_VERSION_COMM_MINOR); | |
775 | if (!rsock) { | |
9a654598 | 776 | status = LTTNG_ERR_FATAL; |
2f77fc4b DG |
777 | goto error; |
778 | } | |
779 | ||
ffe60014 DG |
780 | /* |
781 | * Connect to relayd so we can proceed with a session creation. This call | |
782 | * can possibly block for an arbitrary amount of time to set the health | |
783 | * state to be in poll execution. | |
784 | */ | |
785 | health_poll_entry(); | |
6151a90f | 786 | ret = relayd_connect(rsock); |
ffe60014 | 787 | health_poll_exit(); |
2f77fc4b DG |
788 | if (ret < 0) { |
789 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 790 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
791 | goto free_sock; |
792 | } | |
793 | ||
794 | /* Create socket for control stream. */ | |
795 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
eacb7b6f MD |
796 | uint64_t result_flags; |
797 | ||
2f77fc4b DG |
798 | DBG3("Creating relayd stream socket from URI"); |
799 | ||
800 | /* Check relayd version */ | |
6151a90f | 801 | ret = relayd_version_check(rsock); |
67d5aa28 | 802 | if (ret == LTTNG_ERR_RELAYD_VERSION_FAIL) { |
9a654598 | 803 | status = LTTNG_ERR_RELAYD_VERSION_FAIL; |
67d5aa28 JD |
804 | goto close_sock; |
805 | } else if (ret < 0) { | |
806 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 807 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
808 | goto close_sock; |
809 | } | |
b31610f2 JD |
810 | consumer->relay_major_version = rsock->major; |
811 | consumer->relay_minor_version = rsock->minor; | |
eacb7b6f MD |
812 | ret = relayd_get_configuration(rsock, 0, |
813 | &result_flags); | |
814 | if (ret < 0) { | |
815 | ERR("Unable to get relayd configuration"); | |
816 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; | |
817 | goto close_sock; | |
818 | } | |
819 | if (result_flags & LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED) { | |
820 | consumer->relay_allows_clear = true; | |
821 | } | |
2f77fc4b DG |
822 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
823 | DBG3("Creating relayd data socket from URI"); | |
824 | } else { | |
825 | /* Command is not valid */ | |
826 | ERR("Relayd invalid stream type: %d", uri->stype); | |
9a654598 | 827 | status = LTTNG_ERR_INVALID; |
2f77fc4b DG |
828 | goto close_sock; |
829 | } | |
830 | ||
6151a90f | 831 | *relayd_sock = rsock; |
2f77fc4b | 832 | |
9a654598 | 833 | return status; |
2f77fc4b DG |
834 | |
835 | close_sock: | |
6151a90f JD |
836 | /* The returned value is not useful since we are on an error path. */ |
837 | (void) relayd_close(rsock); | |
2f77fc4b | 838 | free_sock: |
6151a90f | 839 | free(rsock); |
2f77fc4b | 840 | error: |
9a654598 | 841 | return status; |
2f77fc4b DG |
842 | } |
843 | ||
844 | /* | |
845 | * Connect to the relayd using URI and send the socket to the right consumer. | |
43fade62 JG |
846 | * |
847 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
848 | * |
849 | * Returns LTTNG_OK on success or an LTTng error code on failure. | |
2f77fc4b | 850 | */ |
9a654598 JG |
851 | static enum lttng_error_code send_consumer_relayd_socket( |
852 | unsigned int session_id, | |
3044f922 | 853 | struct lttng_uri *relayd_uri, |
56a37563 | 854 | struct consumer_output *consumer, |
d3e2ba59 | 855 | struct consumer_socket *consumer_sock, |
fb9a95c4 | 856 | const char *session_name, const char *hostname, |
6fa5fe7c | 857 | const char *base_path, int session_live_timer, |
db1da059 | 858 | const uint64_t *current_chunk_id, |
46ef2188 MD |
859 | time_t session_creation_time, |
860 | bool session_name_contains_creation_time) | |
2f77fc4b DG |
861 | { |
862 | int ret; | |
6151a90f | 863 | struct lttcomm_relayd_sock *rsock = NULL; |
9a654598 | 864 | enum lttng_error_code status; |
2f77fc4b | 865 | |
ffe60014 | 866 | /* Connect to relayd and make version check if uri is the control. */ |
9a654598 JG |
867 | status = create_connect_relayd(relayd_uri, &rsock, consumer); |
868 | if (status != LTTNG_OK) { | |
9e218353 | 869 | goto relayd_comm_error; |
ffe60014 | 870 | } |
6151a90f | 871 | assert(rsock); |
ffe60014 | 872 | |
2f77fc4b | 873 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
874 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
875 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
876 | /* |
877 | * Increment net_seq_idx because we are about to transfer the | |
878 | * new relayd socket to the consumer. | |
d88aee68 | 879 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 880 | */ |
d88aee68 DG |
881 | consumer->net_seq_index = ++relayd_net_seq_idx; |
882 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
883 | } |
884 | ||
2f77fc4b | 885 | /* Send relayd socket to consumer. */ |
6151a90f | 886 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 | 887 | relayd_uri->stype, session_id, |
6fa5fe7c MD |
888 | session_name, hostname, base_path, |
889 | session_live_timer, current_chunk_id, | |
46ef2188 | 890 | session_creation_time, session_name_contains_creation_time); |
2f77fc4b | 891 | if (ret < 0) { |
9a654598 | 892 | status = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
893 | goto close_sock; |
894 | } | |
895 | ||
c890b720 DG |
896 | /* Flag that the corresponding socket was sent. */ |
897 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 898 | consumer_sock->control_sock_sent = 1; |
c890b720 | 899 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 900 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
901 | } |
902 | ||
2f77fc4b DG |
903 | /* |
904 | * Close socket which was dup on the consumer side. The session daemon does | |
905 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
906 | */ | |
907 | ||
908 | close_sock: | |
9a654598 | 909 | if (status != LTTNG_OK) { |
ffe60014 | 910 | /* |
d9078d0c DG |
911 | * The consumer output for this session should not be used anymore |
912 | * since the relayd connection failed thus making any tracing or/and | |
913 | * streaming not usable. | |
ffe60014 | 914 | */ |
d9078d0c | 915 | consumer->enabled = 0; |
ffe60014 | 916 | } |
9e218353 JR |
917 | (void) relayd_close(rsock); |
918 | free(rsock); | |
919 | ||
920 | relayd_comm_error: | |
9a654598 | 921 | return status; |
2f77fc4b DG |
922 | } |
923 | ||
924 | /* | |
925 | * Send both relayd sockets to a specific consumer and domain. This is a | |
926 | * helper function to facilitate sending the information to the consumer for a | |
927 | * session. | |
43fade62 JG |
928 | * |
929 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
930 | * |
931 | * Returns LTTNG_OK, or an LTTng error code on failure. | |
2f77fc4b | 932 | */ |
9a654598 JG |
933 | static enum lttng_error_code send_consumer_relayd_sockets( |
934 | enum lttng_domain_type domain, | |
56a37563 | 935 | unsigned int session_id, struct consumer_output *consumer, |
fb9a95c4 | 936 | struct consumer_socket *sock, const char *session_name, |
6fa5fe7c | 937 | const char *hostname, const char *base_path, int session_live_timer, |
46ef2188 MD |
938 | const uint64_t *current_chunk_id, time_t session_creation_time, |
939 | bool session_name_contains_creation_time) | |
2f77fc4b | 940 | { |
9a654598 | 941 | enum lttng_error_code status = LTTNG_OK; |
2f77fc4b | 942 | |
2f77fc4b | 943 | assert(consumer); |
6dc3064a | 944 | assert(sock); |
2f77fc4b | 945 | |
2f77fc4b | 946 | /* Sending control relayd socket. */ |
ffe60014 | 947 | if (!sock->control_sock_sent) { |
9a654598 | 948 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 949 | &consumer->dst.net.control, consumer, sock, |
6fa5fe7c | 950 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
951 | current_chunk_id, session_creation_time, |
952 | session_name_contains_creation_time); | |
9a654598 | 953 | if (status != LTTNG_OK) { |
c890b720 DG |
954 | goto error; |
955 | } | |
2f77fc4b DG |
956 | } |
957 | ||
958 | /* Sending data relayd socket. */ | |
ffe60014 | 959 | if (!sock->data_sock_sent) { |
9a654598 | 960 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 961 | &consumer->dst.net.data, consumer, sock, |
6fa5fe7c | 962 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
963 | current_chunk_id, session_creation_time, |
964 | session_name_contains_creation_time); | |
9a654598 | 965 | if (status != LTTNG_OK) { |
c890b720 DG |
966 | goto error; |
967 | } | |
2f77fc4b DG |
968 | } |
969 | ||
2f77fc4b | 970 | error: |
9a654598 | 971 | return status; |
2f77fc4b DG |
972 | } |
973 | ||
974 | /* | |
975 | * Setup relayd connections for a tracing session. First creates the socket to | |
976 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
977 | * network. | |
978 | */ | |
ffe60014 | 979 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 980 | { |
f73fabfd | 981 | int ret = LTTNG_OK; |
2f77fc4b DG |
982 | struct ltt_ust_session *usess; |
983 | struct ltt_kernel_session *ksess; | |
984 | struct consumer_socket *socket; | |
985 | struct lttng_ht_iter iter; | |
1e791a74 | 986 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
2f77fc4b | 987 | |
1e791a74 | 988 | assert(session); |
2f77fc4b DG |
989 | |
990 | usess = session->ust_session; | |
991 | ksess = session->kernel_session; | |
992 | ||
785d2d0d | 993 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 994 | |
aa997ea3 | 995 | rcu_read_lock(); |
1e791a74 JG |
996 | if (session->current_trace_chunk) { |
997 | enum lttng_trace_chunk_status status = lttng_trace_chunk_get_id( | |
998 | session->current_trace_chunk, ¤t_chunk_id.value); | |
999 | ||
1000 | if (status == LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1001 | current_chunk_id.is_set = true; | |
1002 | } else { | |
1003 | ERR("Failed to get current trace chunk id"); | |
1004 | ret = LTTNG_ERR_UNK; | |
1005 | goto error; | |
1006 | } | |
1007 | } | |
1008 | ||
2f77fc4b DG |
1009 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
1010 | && usess->consumer->enabled) { | |
1011 | /* For each consumer socket, send relayd sockets */ | |
1012 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
1013 | socket, node.node) { | |
2f77fc4b | 1014 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1015 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
1016 | usess->consumer, socket, |
1017 | session->name, session->hostname, | |
6fa5fe7c | 1018 | session->base_path, |
1e791a74 | 1019 | session->live_timer, |
db1da059 | 1020 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1021 | session->creation_time, |
1022 | session->name_contains_creation_time); | |
2f77fc4b | 1023 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1024 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1025 | goto error; |
1026 | } | |
6dc3064a DG |
1027 | /* Session is now ready for network streaming. */ |
1028 | session->net_handle = 1; | |
2f77fc4b | 1029 | } |
b31610f2 JD |
1030 | session->consumer->relay_major_version = |
1031 | usess->consumer->relay_major_version; | |
1032 | session->consumer->relay_minor_version = | |
1033 | usess->consumer->relay_minor_version; | |
eacb7b6f MD |
1034 | session->consumer->relay_allows_clear = |
1035 | usess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1036 | } |
1037 | ||
1038 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
1039 | && ksess->consumer->enabled) { | |
1040 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
1041 | socket, node.node) { | |
2f77fc4b | 1042 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1043 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
1044 | ksess->consumer, socket, |
1045 | session->name, session->hostname, | |
6fa5fe7c | 1046 | session->base_path, |
1e791a74 | 1047 | session->live_timer, |
db1da059 | 1048 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1049 | session->creation_time, |
1050 | session->name_contains_creation_time); | |
2f77fc4b | 1051 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1052 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1053 | goto error; |
1054 | } | |
6dc3064a DG |
1055 | /* Session is now ready for network streaming. */ |
1056 | session->net_handle = 1; | |
2f77fc4b | 1057 | } |
b31610f2 JD |
1058 | session->consumer->relay_major_version = |
1059 | ksess->consumer->relay_major_version; | |
1060 | session->consumer->relay_minor_version = | |
1061 | ksess->consumer->relay_minor_version; | |
eacb7b6f MD |
1062 | session->consumer->relay_allows_clear = |
1063 | ksess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1064 | } |
1065 | ||
1066 | error: | |
e7fe706f | 1067 | rcu_read_unlock(); |
2f77fc4b DG |
1068 | return ret; |
1069 | } | |
1070 | ||
9b6c7ec5 DG |
1071 | /* |
1072 | * Start a kernel session by opening all necessary streams. | |
1073 | */ | |
4dbe1875 | 1074 | int start_kernel_session(struct ltt_kernel_session *ksess) |
9b6c7ec5 DG |
1075 | { |
1076 | int ret; | |
1077 | struct ltt_kernel_channel *kchan; | |
1078 | ||
1079 | /* Open kernel metadata */ | |
07b86b52 | 1080 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
1081 | ret = kernel_open_metadata(ksess); |
1082 | if (ret < 0) { | |
1083 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1084 | goto error; | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | /* Open kernel metadata stream */ | |
07b86b52 | 1089 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1090 | ret = kernel_open_metadata_stream(ksess); |
1091 | if (ret < 0) { | |
1092 | ERR("Kernel create metadata stream failed"); | |
1093 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1094 | goto error; | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | /* For each channel */ | |
1099 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1100 | if (kchan->stream_count == 0) { | |
1101 | ret = kernel_open_channel_stream(kchan); | |
1102 | if (ret < 0) { | |
1103 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1104 | goto error; | |
1105 | } | |
1106 | /* Update the stream global counter */ | |
1107 | ksess->stream_count_global += ret; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | /* Setup kernel consumer socket and send fds to it */ | |
1112 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1113 | if (ret != 0) { |
9b6c7ec5 DG |
1114 | ret = LTTNG_ERR_KERN_START_FAIL; |
1115 | goto error; | |
1116 | } | |
1117 | ||
1118 | /* This start the kernel tracing */ | |
1119 | ret = kernel_start_session(ksess); | |
1120 | if (ret < 0) { | |
1121 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1122 | goto error; | |
1123 | } | |
1124 | ||
1125 | /* Quiescent wait after starting trace */ | |
7d268848 | 1126 | kernel_wait_quiescent(); |
9b6c7ec5 | 1127 | |
14fb1ebe | 1128 | ksess->active = 1; |
9b6c7ec5 DG |
1129 | |
1130 | ret = LTTNG_OK; | |
1131 | ||
1132 | error: | |
1133 | return ret; | |
1134 | } | |
1135 | ||
4dbe1875 MD |
1136 | int stop_kernel_session(struct ltt_kernel_session *ksess) |
1137 | { | |
1138 | struct ltt_kernel_channel *kchan; | |
1139 | bool error_occurred = false; | |
1140 | int ret; | |
1141 | ||
1142 | if (!ksess || !ksess->active) { | |
1143 | return LTTNG_OK; | |
1144 | } | |
1145 | DBG("Stopping kernel tracing"); | |
1146 | ||
1147 | ret = kernel_stop_session(ksess); | |
1148 | if (ret < 0) { | |
1149 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1150 | goto error; | |
1151 | } | |
1152 | ||
1153 | kernel_wait_quiescent(); | |
1154 | ||
1155 | /* Flush metadata after stopping (if exists) */ | |
1156 | if (ksess->metadata_stream_fd >= 0) { | |
1157 | ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd); | |
1158 | if (ret < 0) { | |
1159 | ERR("Kernel metadata flush failed"); | |
1160 | error_occurred = true; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | /* Flush all buffers after stopping */ | |
1165 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1166 | ret = kernel_flush_buffer(kchan); | |
1167 | if (ret < 0) { | |
1168 | ERR("Kernel flush buffer error"); | |
1169 | error_occurred = true; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | ksess->active = 0; | |
1174 | if (error_occurred) { | |
1175 | ret = LTTNG_ERR_UNK; | |
1176 | } else { | |
1177 | ret = LTTNG_OK; | |
1178 | } | |
1179 | error: | |
1180 | return ret; | |
1181 | } | |
1182 | ||
2f77fc4b DG |
1183 | /* |
1184 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1185 | */ | |
56a37563 JG |
1186 | int cmd_disable_channel(struct ltt_session *session, |
1187 | enum lttng_domain_type domain, char *channel_name) | |
2f77fc4b DG |
1188 | { |
1189 | int ret; | |
1190 | struct ltt_ust_session *usess; | |
1191 | ||
1192 | usess = session->ust_session; | |
1193 | ||
2223c96f DG |
1194 | rcu_read_lock(); |
1195 | ||
2f77fc4b DG |
1196 | switch (domain) { |
1197 | case LTTNG_DOMAIN_KERNEL: | |
1198 | { | |
1199 | ret = channel_kernel_disable(session->kernel_session, | |
1200 | channel_name); | |
f73fabfd | 1201 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1202 | goto error; |
1203 | } | |
1204 | ||
7d268848 | 1205 | kernel_wait_quiescent(); |
2f77fc4b DG |
1206 | break; |
1207 | } | |
1208 | case LTTNG_DOMAIN_UST: | |
1209 | { | |
1210 | struct ltt_ust_channel *uchan; | |
1211 | struct lttng_ht *chan_ht; | |
1212 | ||
1213 | chan_ht = usess->domain_global.channels; | |
1214 | ||
1215 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
1216 | if (uchan == NULL) { | |
f73fabfd | 1217 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1218 | goto error; |
1219 | } | |
1220 | ||
7972aab2 | 1221 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1222 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1223 | goto error; |
1224 | } | |
1225 | break; | |
1226 | } | |
2f77fc4b | 1227 | default: |
f73fabfd | 1228 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1229 | goto error; |
1230 | } | |
1231 | ||
f73fabfd | 1232 | ret = LTTNG_OK; |
2f77fc4b DG |
1233 | |
1234 | error: | |
2223c96f | 1235 | rcu_read_unlock(); |
2f77fc4b DG |
1236 | return ret; |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1241 | * | |
1242 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1243 | */ | |
33b9609d JR |
1244 | int cmd_enable_channel(struct command_ctx *cmd_ctx, int sock, int wpipe) |
1245 | { | |
1246 | int ret; | |
1247 | size_t channel_len; | |
1248 | ssize_t sock_recv_len; | |
1249 | struct lttng_channel *channel = NULL; | |
1250 | struct lttng_buffer_view view; | |
1251 | struct lttng_dynamic_buffer channel_buffer; | |
1252 | ||
1253 | lttng_dynamic_buffer_init(&channel_buffer); | |
1254 | channel_len = (size_t) cmd_ctx->lsm->u.channel.length; | |
1255 | ret = lttng_dynamic_buffer_set_size(&channel_buffer, channel_len); | |
1256 | if (ret) { | |
1257 | ret = LTTNG_ERR_NOMEM; | |
1258 | goto end; | |
1259 | } | |
1260 | ||
1261 | sock_recv_len = lttcomm_recv_unix_sock(sock, channel_buffer.data, | |
1262 | channel_len); | |
1263 | if (sock_recv_len < 0 || sock_recv_len != channel_len) { | |
1264 | ERR("Failed to receive \"enable channel\" command payload"); | |
1265 | ret = LTTNG_ERR_INVALID; | |
1266 | goto end; | |
1267 | } | |
1268 | ||
1269 | view = lttng_buffer_view_from_dynamic_buffer(&channel_buffer, 0, channel_len); | |
1270 | if (!lttng_buffer_view_is_valid(&view)) { | |
1271 | ret = LTTNG_ERR_INVALID; | |
1272 | goto end; | |
1273 | } | |
1274 | ||
1275 | if (lttng_channel_create_from_buffer(&view, &channel) != channel_len) { | |
1276 | ERR("Invalid channel payload received in \"enable channel\" command"); | |
1277 | ret = LTTNG_ERR_INVALID; | |
1278 | goto end; | |
1279 | } | |
1280 | ||
1281 | ret = cmd_enable_channel_internal(cmd_ctx->session, | |
1282 | ALIGNED_CONST_PTR(cmd_ctx->lsm->domain), channel, | |
1283 | wpipe); | |
1284 | ||
1285 | end: | |
1286 | lttng_dynamic_buffer_reset(&channel_buffer); | |
1287 | lttng_channel_destroy(channel); | |
1288 | return ret; | |
1289 | } | |
1290 | ||
1291 | static int cmd_enable_channel_internal(struct ltt_session *session, | |
1292 | const struct lttng_domain *domain, | |
1293 | const struct lttng_channel *_attr, | |
1294 | int wpipe) | |
2f77fc4b DG |
1295 | { |
1296 | int ret; | |
1297 | struct ltt_ust_session *usess = session->ust_session; | |
1298 | struct lttng_ht *chan_ht; | |
1f345e94 | 1299 | size_t len; |
33b9609d | 1300 | struct lttng_channel *attr = NULL; |
2f77fc4b DG |
1301 | |
1302 | assert(session); | |
df4f5a87 | 1303 | assert(_attr); |
7972aab2 | 1304 | assert(domain); |
2f77fc4b | 1305 | |
33b9609d JR |
1306 | attr = lttng_channel_copy(_attr); |
1307 | if (!attr) { | |
1308 | ret = -LTTNG_ERR_NOMEM; | |
1309 | goto end; | |
1310 | } | |
1311 | ||
1312 | len = lttng_strnlen(attr->name, sizeof(attr->name)); | |
1f345e94 PP |
1313 | |
1314 | /* Validate channel name */ | |
33b9609d JR |
1315 | if (attr->name[0] == '.' || |
1316 | memchr(attr->name, '/', len) != NULL) { | |
1f345e94 PP |
1317 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; |
1318 | goto end; | |
1319 | } | |
1320 | ||
33b9609d | 1321 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
2f77fc4b | 1322 | |
03b4fdcf DG |
1323 | rcu_read_lock(); |
1324 | ||
ecc48a90 JD |
1325 | /* |
1326 | * If the session is a live session, remove the switch timer, the | |
1327 | * live timer does the same thing but sends also synchronisation | |
1328 | * beacons for inactive streams. | |
1329 | */ | |
1330 | if (session->live_timer > 0) { | |
33b9609d JR |
1331 | attr->attr.live_timer_interval = session->live_timer; |
1332 | attr->attr.switch_timer_interval = 0; | |
ecc48a90 JD |
1333 | } |
1334 | ||
6e21424e JR |
1335 | /* Check for feature support */ |
1336 | switch (domain->type) { | |
1337 | case LTTNG_DOMAIN_KERNEL: | |
1338 | { | |
7d268848 | 1339 | if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) { |
6e21424e JR |
1340 | /* Sampling position of buffer is not supported */ |
1341 | WARN("Kernel tracer does not support buffer monitoring. " | |
1342 | "Setting the monitor interval timer to 0 " | |
1343 | "(disabled) for channel '%s' of session '%s'", | |
33b9609d JR |
1344 | attr->name, session->name); |
1345 | lttng_channel_set_monitor_timer_interval(attr, 0); | |
6e21424e JR |
1346 | } |
1347 | break; | |
1348 | } | |
1349 | case LTTNG_DOMAIN_UST: | |
f28f9e44 | 1350 | break; |
6e21424e JR |
1351 | case LTTNG_DOMAIN_JUL: |
1352 | case LTTNG_DOMAIN_LOG4J: | |
1353 | case LTTNG_DOMAIN_PYTHON: | |
f28f9e44 JG |
1354 | if (!agent_tracing_is_enabled()) { |
1355 | DBG("Attempted to enable a channel in an agent domain but the agent thread is not running"); | |
1356 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
1357 | goto error; | |
1358 | } | |
6e21424e JR |
1359 | break; |
1360 | default: | |
1361 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1362 | goto error; | |
1363 | } | |
1364 | ||
7972aab2 | 1365 | switch (domain->type) { |
2f77fc4b DG |
1366 | case LTTNG_DOMAIN_KERNEL: |
1367 | { | |
1368 | struct ltt_kernel_channel *kchan; | |
1369 | ||
33b9609d JR |
1370 | kchan = trace_kernel_get_channel_by_name( |
1371 | attr->name, session->kernel_session); | |
2f77fc4b | 1372 | if (kchan == NULL) { |
06671f34 JR |
1373 | /* |
1374 | * Don't try to create a channel if the session has been started at | |
1375 | * some point in time before. The tracer does not allow it. | |
1376 | */ | |
1377 | if (session->has_been_started) { | |
1378 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
1379 | goto error; | |
1380 | } | |
1381 | ||
54213acc JG |
1382 | if (session->snapshot.nb_output > 0 || |
1383 | session->snapshot_mode) { | |
1384 | /* Enforce mmap output for snapshot sessions. */ | |
33b9609d | 1385 | attr->attr.output = LTTNG_EVENT_MMAP; |
54213acc | 1386 | } |
33b9609d JR |
1387 | ret = channel_kernel_create( |
1388 | session->kernel_session, attr, wpipe); | |
1389 | if (attr->name[0] != '\0') { | |
85076754 MD |
1390 | session->kernel_session->has_non_default_channel = 1; |
1391 | } | |
2f77fc4b DG |
1392 | } else { |
1393 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1394 | } | |
1395 | ||
f73fabfd | 1396 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1397 | goto error; |
1398 | } | |
1399 | ||
7d268848 | 1400 | kernel_wait_quiescent(); |
2f77fc4b DG |
1401 | break; |
1402 | } | |
1403 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1404 | case LTTNG_DOMAIN_JUL: |
1405 | case LTTNG_DOMAIN_LOG4J: | |
1406 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1407 | { |
1408 | struct ltt_ust_channel *uchan; | |
1409 | ||
9232818f JG |
1410 | /* |
1411 | * FIXME | |
1412 | * | |
1413 | * Current agent implementation limitations force us to allow | |
1414 | * only one channel at once in "agent" subdomains. Each | |
1415 | * subdomain has a default channel name which must be strictly | |
1416 | * adhered to. | |
1417 | */ | |
1418 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
33b9609d | 1419 | if (strncmp(attr->name, DEFAULT_JUL_CHANNEL_NAME, |
9232818f JG |
1420 | LTTNG_SYMBOL_NAME_LEN)) { |
1421 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1422 | goto error; | |
1423 | } | |
1424 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
33b9609d | 1425 | if (strncmp(attr->name, DEFAULT_LOG4J_CHANNEL_NAME, |
9232818f JG |
1426 | LTTNG_SYMBOL_NAME_LEN)) { |
1427 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1428 | goto error; | |
1429 | } | |
1430 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
33b9609d | 1431 | if (strncmp(attr->name, DEFAULT_PYTHON_CHANNEL_NAME, |
9232818f JG |
1432 | LTTNG_SYMBOL_NAME_LEN)) { |
1433 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1434 | goto error; | |
1435 | } | |
1436 | } | |
1437 | ||
2f77fc4b DG |
1438 | chan_ht = usess->domain_global.channels; |
1439 | ||
33b9609d | 1440 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
2f77fc4b | 1441 | if (uchan == NULL) { |
06671f34 JR |
1442 | /* |
1443 | * Don't try to create a channel if the session has been started at | |
1444 | * some point in time before. The tracer does not allow it. | |
1445 | */ | |
1446 | if (session->has_been_started) { | |
1447 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
1448 | goto error; | |
1449 | } | |
1450 | ||
33b9609d JR |
1451 | ret = channel_ust_create(usess, attr, domain->buf_type); |
1452 | if (attr->name[0] != '\0') { | |
85076754 MD |
1453 | usess->has_non_default_channel = 1; |
1454 | } | |
2f77fc4b | 1455 | } else { |
7972aab2 | 1456 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1457 | } |
1458 | break; | |
1459 | } | |
2f77fc4b | 1460 | default: |
f73fabfd | 1461 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1462 | goto error; |
1463 | } | |
1464 | ||
33b9609d | 1465 | if (ret == LTTNG_OK && attr->attr.output != LTTNG_EVENT_MMAP) { |
54213acc JG |
1466 | session->has_non_mmap_channel = true; |
1467 | } | |
2f77fc4b | 1468 | error: |
2223c96f | 1469 | rcu_read_unlock(); |
1f345e94 | 1470 | end: |
33b9609d | 1471 | lttng_channel_destroy(attr); |
2f77fc4b DG |
1472 | return ret; |
1473 | } | |
1474 | ||
f953b297 JG |
1475 | enum lttng_error_code cmd_process_attr_tracker_get_tracking_policy( |
1476 | struct ltt_session *session, | |
1477 | enum lttng_domain_type domain, | |
1478 | enum lttng_process_attr process_attr, | |
1479 | enum lttng_tracking_policy *policy) | |
1480 | { | |
1481 | enum lttng_error_code ret_code = LTTNG_OK; | |
1482 | const struct process_attr_tracker *tracker; | |
1483 | ||
1484 | switch (domain) { | |
1485 | case LTTNG_DOMAIN_KERNEL: | |
1486 | if (!session->kernel_session) { | |
1487 | ret_code = LTTNG_ERR_INVALID; | |
1488 | goto end; | |
1489 | } | |
1490 | tracker = kernel_get_process_attr_tracker( | |
1491 | session->kernel_session, process_attr); | |
1492 | break; | |
1493 | case LTTNG_DOMAIN_UST: | |
1494 | if (!session->ust_session) { | |
1495 | ret_code = LTTNG_ERR_INVALID; | |
1496 | goto end; | |
1497 | } | |
1498 | tracker = trace_ust_get_process_attr_tracker( | |
1499 | session->ust_session, process_attr); | |
1500 | break; | |
1501 | default: | |
1502 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1503 | goto end; | |
1504 | } | |
1505 | if (tracker) { | |
1506 | *policy = process_attr_tracker_get_tracking_policy(tracker); | |
1507 | } else { | |
1508 | ret_code = LTTNG_ERR_INVALID; | |
1509 | } | |
1510 | end: | |
1511 | return ret_code; | |
1512 | } | |
1513 | ||
1514 | enum lttng_error_code cmd_process_attr_tracker_set_tracking_policy( | |
1515 | struct ltt_session *session, | |
1516 | enum lttng_domain_type domain, | |
1517 | enum lttng_process_attr process_attr, | |
1518 | enum lttng_tracking_policy policy) | |
1519 | { | |
1520 | enum lttng_error_code ret_code = LTTNG_OK; | |
1521 | ||
1522 | switch (policy) { | |
1523 | case LTTNG_TRACKING_POLICY_INCLUDE_SET: | |
1524 | case LTTNG_TRACKING_POLICY_EXCLUDE_ALL: | |
1525 | case LTTNG_TRACKING_POLICY_INCLUDE_ALL: | |
1526 | break; | |
1527 | default: | |
1528 | ret_code = LTTNG_ERR_INVALID; | |
1529 | goto end; | |
1530 | } | |
1531 | ||
1532 | switch (domain) { | |
1533 | case LTTNG_DOMAIN_KERNEL: | |
1534 | if (!session->kernel_session) { | |
1535 | ret_code = LTTNG_ERR_INVALID; | |
1536 | goto end; | |
1537 | } | |
1538 | ret_code = kernel_process_attr_tracker_set_tracking_policy( | |
1539 | session->kernel_session, process_attr, policy); | |
1540 | break; | |
1541 | case LTTNG_DOMAIN_UST: | |
1542 | if (!session->ust_session) { | |
1543 | ret_code = LTTNG_ERR_INVALID; | |
1544 | goto end; | |
1545 | } | |
1546 | ret_code = trace_ust_process_attr_tracker_set_tracking_policy( | |
1547 | session->ust_session, process_attr, policy); | |
1548 | break; | |
1549 | default: | |
1550 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1551 | break; | |
1552 | } | |
1553 | end: | |
1554 | return ret_code; | |
1555 | } | |
1556 | ||
1557 | enum lttng_error_code cmd_process_attr_tracker_inclusion_set_add_value( | |
1558 | struct ltt_session *session, | |
1559 | enum lttng_domain_type domain, | |
1560 | enum lttng_process_attr process_attr, | |
1561 | const struct process_attr_value *value) | |
1562 | { | |
1563 | enum lttng_error_code ret_code = LTTNG_OK; | |
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_inclusion_set_add_value( | |
1572 | session->kernel_session, process_attr, value); | |
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_inclusion_set_add_value( | |
1580 | session->ust_session, process_attr, value); | |
1581 | break; | |
1582 | default: | |
1583 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1584 | break; | |
1585 | } | |
1586 | end: | |
1587 | return ret_code; | |
1588 | } | |
1589 | ||
1590 | enum lttng_error_code cmd_process_attr_tracker_inclusion_set_remove_value( | |
1591 | struct ltt_session *session, | |
1592 | enum lttng_domain_type domain, | |
1593 | enum lttng_process_attr process_attr, | |
1594 | const struct process_attr_value *value) | |
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_remove_value( | |
1605 | session->kernel_session, process_attr, value); | |
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_remove_value( | |
1613 | session->ust_session, process_attr, value); | |
1614 | break; | |
1615 | default: | |
1616 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1617 | break; | |
1618 | } | |
1619 | end: | |
1620 | return ret_code; | |
1621 | } | |
1622 | ||
1623 | enum lttng_error_code cmd_process_attr_tracker_get_inclusion_set( | |
1624 | struct ltt_session *session, | |
1625 | enum lttng_domain_type domain, | |
1626 | enum lttng_process_attr process_attr, | |
1627 | struct lttng_process_attr_values **values) | |
1628 | { | |
1629 | enum lttng_error_code ret_code = LTTNG_OK; | |
1630 | const struct process_attr_tracker *tracker; | |
1631 | enum process_attr_tracker_status status; | |
1632 | ||
1633 | switch (domain) { | |
1634 | case LTTNG_DOMAIN_KERNEL: | |
1635 | if (!session->kernel_session) { | |
1636 | ret_code = LTTNG_ERR_INVALID; | |
1637 | goto end; | |
1638 | } | |
1639 | tracker = kernel_get_process_attr_tracker( | |
1640 | session->kernel_session, process_attr); | |
1641 | break; | |
1642 | case LTTNG_DOMAIN_UST: | |
1643 | if (!session->ust_session) { | |
1644 | ret_code = LTTNG_ERR_INVALID; | |
1645 | goto end; | |
1646 | } | |
1647 | tracker = trace_ust_get_process_attr_tracker( | |
1648 | session->ust_session, process_attr); | |
1649 | break; | |
1650 | default: | |
1651 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1652 | goto end; | |
1653 | } | |
1654 | ||
1655 | if (!tracker) { | |
1656 | ret_code = LTTNG_ERR_INVALID; | |
1657 | goto end; | |
1658 | } | |
1659 | ||
1660 | status = process_attr_tracker_get_inclusion_set(tracker, values); | |
1661 | switch (status) { | |
1662 | case PROCESS_ATTR_TRACKER_STATUS_OK: | |
1663 | ret_code = LTTNG_OK; | |
1664 | break; | |
1665 | case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY: | |
1666 | ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY; | |
1667 | break; | |
1668 | case PROCESS_ATTR_TRACKER_STATUS_ERROR: | |
1669 | ret_code = LTTNG_ERR_NOMEM; | |
1670 | break; | |
1671 | default: | |
1672 | ret_code = LTTNG_ERR_UNK; | |
1673 | break; | |
1674 | } | |
1675 | ||
1676 | end: | |
1677 | return ret_code; | |
1678 | } | |
1679 | ||
2f77fc4b DG |
1680 | /* |
1681 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1682 | */ | |
166fc586 | 1683 | int cmd_disable_event(struct command_ctx *cmd_ctx, int sock) |
2f77fc4b DG |
1684 | { |
1685 | int ret; | |
166fc586 | 1686 | size_t event_len; |
df4f5a87 | 1687 | const char *event_name; |
166fc586 JR |
1688 | ssize_t sock_recv_len; |
1689 | struct lttng_event *event = NULL; | |
1690 | struct lttng_buffer_view view; | |
1691 | struct lttng_dynamic_buffer event_buffer; | |
1692 | struct lttng_event_exclusion *exclusion = NULL; | |
1693 | struct lttng_filter_bytecode *bytecode = NULL; | |
1694 | char *filter_expression = NULL; | |
1695 | unsigned int exclusion_count; | |
1696 | const struct ltt_session *session = cmd_ctx->session; | |
1697 | const char *channel_name = cmd_ctx->lsm->u.disable.channel_name; | |
1698 | enum lttng_domain_type domain = cmd_ctx->lsm->domain.type; | |
1699 | ||
1700 | lttng_dynamic_buffer_init(&event_buffer); | |
1701 | event_len = (size_t) cmd_ctx->lsm->u.disable.length; | |
1702 | ret = lttng_dynamic_buffer_set_size(&event_buffer, event_len); | |
1703 | if (ret) { | |
1704 | ret = LTTNG_ERR_NOMEM; | |
1705 | goto error; | |
1706 | } | |
1707 | ||
1708 | sock_recv_len = lttcomm_recv_unix_sock( | |
1709 | sock, event_buffer.data, event_len); | |
1710 | if (sock_recv_len < 0 || sock_recv_len != event_len) { | |
1711 | ERR("Failed to receive \"disable event\" command payload"); | |
1712 | ret = LTTNG_ERR_INVALID; | |
1713 | goto error; | |
1714 | } | |
1715 | ||
1716 | view = lttng_buffer_view_from_dynamic_buffer(&event_buffer, 0, -1); | |
1717 | ||
1718 | if (lttng_event_create_from_buffer(&view, &event, | |
1719 | &exclusion, &filter_expression, | |
1720 | &bytecode, sock) != event_len) { | |
1721 | ERR("Invalid event payload received in \"disable event\" command"); | |
1722 | ret = LTTNG_ERR_INVALID; | |
1723 | goto error; | |
1724 | } | |
6e911cad | 1725 | |
18a720cd MD |
1726 | DBG("Disable event command for event \'%s\'", event->name); |
1727 | ||
166fc586 JR |
1728 | /* |
1729 | * Filter and exclusions are simply not handled by the | |
1730 | * disable event command at this time. | |
1731 | * | |
1732 | * FIXME | |
1733 | */ | |
1734 | (void) filter_expression; | |
1735 | (void) exclusion; | |
1736 | (void) exclusion_count; | |
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 | ||
9b7431cf JG |
1744 | /* Error out on unhandled search criteria */ |
1745 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad | 1746 | || event->pid || event->filter || event->exclusion) { |
7076b56e JG |
1747 | ret = LTTNG_ERR_UNK; |
1748 | goto error; | |
6e911cad | 1749 | } |
2f77fc4b | 1750 | |
2223c96f DG |
1751 | rcu_read_lock(); |
1752 | ||
2f77fc4b DG |
1753 | switch (domain) { |
1754 | case LTTNG_DOMAIN_KERNEL: | |
1755 | { | |
1756 | struct ltt_kernel_channel *kchan; | |
1757 | struct ltt_kernel_session *ksess; | |
1758 | ||
1759 | ksess = session->kernel_session; | |
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 DG |
1771 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1772 | if (kchan == NULL) { | |
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: | |
1783 | case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ | |
1784 | if (event_name[0] == '\0') { | |
1785 | ret = event_kernel_disable_event(kchan, | |
1786 | NULL, event->type); | |
29c62722 | 1787 | } else { |
d0ae4ea8 | 1788 | ret = event_kernel_disable_event(kchan, |
9550ee81 | 1789 | event_name, event->type); |
29c62722 | 1790 | } |
6e911cad | 1791 | if (ret != LTTNG_OK) { |
7076b56e | 1792 | goto error_unlock; |
6e911cad MD |
1793 | } |
1794 | break; | |
6e911cad MD |
1795 | default: |
1796 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1797 | goto error_unlock; |
2f77fc4b DG |
1798 | } |
1799 | ||
7d268848 | 1800 | kernel_wait_quiescent(); |
2f77fc4b DG |
1801 | break; |
1802 | } | |
1803 | case LTTNG_DOMAIN_UST: | |
1804 | { | |
1805 | struct ltt_ust_channel *uchan; | |
1806 | struct ltt_ust_session *usess; | |
1807 | ||
1808 | usess = session->ust_session; | |
1809 | ||
7076b56e JG |
1810 | if (validate_ust_event_name(event_name)) { |
1811 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1812 | goto error_unlock; | |
1813 | } | |
1814 | ||
85076754 MD |
1815 | /* |
1816 | * If a non-default channel has been created in the | |
9550ee81 | 1817 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1818 | * to be provided. |
1819 | */ | |
1820 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1821 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1822 | goto error_unlock; |
85076754 MD |
1823 | } |
1824 | ||
2f77fc4b DG |
1825 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1826 | channel_name); | |
1827 | if (uchan == NULL) { | |
f73fabfd | 1828 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1829 | goto error_unlock; |
2f77fc4b DG |
1830 | } |
1831 | ||
6e911cad MD |
1832 | switch (event->type) { |
1833 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1834 | /* |
1835 | * An empty event name means that everything | |
1836 | * should be disabled. | |
1837 | */ | |
1838 | if (event->name[0] == '\0') { | |
1839 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 JR |
1840 | } else { |
1841 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1842 | event_name); | |
1843 | } | |
6e911cad | 1844 | if (ret != LTTNG_OK) { |
7076b56e | 1845 | goto error_unlock; |
6e911cad MD |
1846 | } |
1847 | break; | |
1848 | default: | |
1849 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1850 | goto error_unlock; |
2f77fc4b DG |
1851 | } |
1852 | ||
1853 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1854 | channel_name); | |
1855 | break; | |
1856 | } | |
5cdb6027 | 1857 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1858 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1859 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1860 | { |
fefd409b | 1861 | struct agent *agt; |
f20baf8e DG |
1862 | struct ltt_ust_session *usess = session->ust_session; |
1863 | ||
1864 | assert(usess); | |
1865 | ||
6e911cad MD |
1866 | switch (event->type) { |
1867 | case LTTNG_EVENT_ALL: | |
1868 | break; | |
1869 | default: | |
1870 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1871 | goto error_unlock; |
6e911cad MD |
1872 | } |
1873 | ||
5cdb6027 | 1874 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1875 | if (!agt) { |
1876 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1877 | goto error_unlock; |
fefd409b | 1878 | } |
b3639870 JR |
1879 | /* |
1880 | * An empty event name means that everything | |
1881 | * should be disabled. | |
1882 | */ | |
1883 | if (event->name[0] == '\0') { | |
18a720cd MD |
1884 | ret = event_agent_disable_all(usess, agt); |
1885 | } else { | |
1886 | ret = event_agent_disable(usess, agt, event_name); | |
1887 | } | |
f20baf8e | 1888 | if (ret != LTTNG_OK) { |
7076b56e | 1889 | goto error_unlock; |
f20baf8e DG |
1890 | } |
1891 | ||
1892 | break; | |
1893 | } | |
2f77fc4b | 1894 | default: |
f73fabfd | 1895 | ret = LTTNG_ERR_UND; |
7076b56e | 1896 | goto error_unlock; |
2f77fc4b DG |
1897 | } |
1898 | ||
f73fabfd | 1899 | ret = LTTNG_OK; |
2f77fc4b | 1900 | |
7076b56e | 1901 | error_unlock: |
2223c96f | 1902 | rcu_read_unlock(); |
7076b56e | 1903 | error: |
166fc586 JR |
1904 | free(exclusion); |
1905 | free(bytecode); | |
1906 | free(filter_expression); | |
1907 | lttng_event_destroy(event); | |
1908 | lttng_dynamic_buffer_reset(&event_buffer); | |
1909 | ||
2f77fc4b DG |
1910 | return ret; |
1911 | } | |
1912 | ||
2f77fc4b DG |
1913 | /* |
1914 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1915 | */ | |
b583ad83 JR |
1916 | |
1917 | int cmd_add_context(struct command_ctx *cmd_ctx, int sock, int kwpipe) | |
2f77fc4b | 1918 | { |
b583ad83 | 1919 | struct lttng_event_context *ctx = NULL; |
d5979e4a | 1920 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
b583ad83 JR |
1921 | struct lttng_dynamic_buffer buffer; |
1922 | struct lttng_buffer_view view; | |
1923 | size_t context_len; | |
1924 | ssize_t sock_recv_len; | |
1925 | enum lttng_domain_type domain = cmd_ctx->lsm->domain.type; | |
1926 | struct ltt_session *session = cmd_ctx->session; | |
1927 | const char *channel_name = cmd_ctx->lsm->u.context.channel_name; | |
1928 | ||
1929 | lttng_dynamic_buffer_init(&buffer); | |
1930 | ||
1931 | context_len = (size_t) cmd_ctx->lsm->u.context.length; | |
1932 | ret = lttng_dynamic_buffer_set_size(&buffer, context_len); | |
1933 | if (ret) { | |
1934 | ret = LTTNG_ERR_NOMEM; | |
1935 | goto end; | |
1936 | } | |
1937 | ||
1938 | sock_recv_len = lttcomm_recv_unix_sock(sock, buffer.data, context_len); | |
1939 | if (sock_recv_len < 0 || sock_recv_len != context_len) { | |
1940 | ERR("Failed to receive \"add context\" command payload"); | |
1941 | ret = LTTNG_ERR_INVALID; | |
1942 | goto end; | |
1943 | } | |
1944 | ||
1945 | view = lttng_buffer_view_from_dynamic_buffer(&buffer, 0, -1); | |
1946 | ||
1947 | if (lttng_event_context_create_from_buffer(&view, &ctx) != | |
1948 | context_len) { | |
1949 | ERR("Invalid event context payload received in \"add context\" command"); | |
1950 | ret = LTTNG_ERR_INVALID; | |
1951 | goto end; | |
1952 | } | |
bdf64013 | 1953 | |
9a699f7b JR |
1954 | /* |
1955 | * Don't try to add a context if the session has been started at | |
1956 | * some point in time before. The tracer does not allow it and would | |
1957 | * result in a corrupted trace. | |
1958 | */ | |
b583ad83 | 1959 | if (cmd_ctx->session->has_been_started) { |
9a699f7b JR |
1960 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1961 | goto end; | |
1962 | } | |
1963 | ||
2f77fc4b DG |
1964 | switch (domain) { |
1965 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1966 | assert(session->kernel_session); |
1967 | ||
1968 | if (session->kernel_session->channel_count == 0) { | |
1969 | /* Create default channel */ | |
1970 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1971 | if (ret != LTTNG_OK) { | |
1972 | goto error; | |
1973 | } | |
d5979e4a | 1974 | chan_kern_created = 1; |
979e618e | 1975 | } |
2f77fc4b | 1976 | /* Add kernel context to kernel tracer */ |
601d5acf | 1977 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1978 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1979 | goto error; |
1980 | } | |
1981 | break; | |
bdf64013 JG |
1982 | case LTTNG_DOMAIN_JUL: |
1983 | case LTTNG_DOMAIN_LOG4J: | |
1984 | { | |
1985 | /* | |
1986 | * Validate channel name. | |
1987 | * If no channel name is given and the domain is JUL or LOG4J, | |
1988 | * set it to the appropriate domain-specific channel name. If | |
1989 | * a name is provided but does not match the expexted channel | |
1990 | * name, return an error. | |
1991 | */ | |
1992 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
1993 | strcmp(channel_name, | |
1994 | DEFAULT_JUL_CHANNEL_NAME)) { | |
1995 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1996 | goto error; | |
1997 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
1998 | strcmp(channel_name, | |
1999 | DEFAULT_LOG4J_CHANNEL_NAME)) { | |
2000 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2001 | goto error; | |
2002 | } | |
a93b3916 | 2003 | /* break is _not_ missing here. */ |
bdf64013 | 2004 | } |
2f77fc4b DG |
2005 | case LTTNG_DOMAIN_UST: |
2006 | { | |
2007 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
2008 | unsigned int chan_count; |
2009 | ||
2f77fc4b DG |
2010 | assert(usess); |
2011 | ||
85076754 | 2012 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
2013 | if (chan_count == 0) { |
2014 | struct lttng_channel *attr; | |
2015 | /* Create default channel */ | |
0a9c6494 | 2016 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
2017 | if (attr == NULL) { |
2018 | ret = LTTNG_ERR_FATAL; | |
2019 | goto error; | |
2020 | } | |
2021 | ||
7972aab2 | 2022 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
2023 | if (ret != LTTNG_OK) { |
2024 | free(attr); | |
2025 | goto error; | |
2026 | } | |
cf0bcb51 | 2027 | channel_attr_destroy(attr); |
d5979e4a | 2028 | chan_ust_created = 1; |
979e618e DG |
2029 | } |
2030 | ||
601d5acf | 2031 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 2032 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2033 | goto error; |
2034 | } | |
2035 | break; | |
2036 | } | |
2f77fc4b | 2037 | default: |
f73fabfd | 2038 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2039 | goto error; |
2040 | } | |
2041 | ||
bdf64013 JG |
2042 | ret = LTTNG_OK; |
2043 | goto end; | |
2f77fc4b DG |
2044 | |
2045 | error: | |
d5979e4a DG |
2046 | if (chan_kern_created) { |
2047 | struct ltt_kernel_channel *kchan = | |
2048 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
2049 | session->kernel_session); | |
2050 | /* Created previously, this should NOT fail. */ | |
2051 | assert(kchan); | |
2052 | kernel_destroy_channel(kchan); | |
2053 | } | |
2054 | ||
2055 | if (chan_ust_created) { | |
2056 | struct ltt_ust_channel *uchan = | |
2057 | trace_ust_find_channel_by_name( | |
2058 | session->ust_session->domain_global.channels, | |
2059 | DEFAULT_CHANNEL_NAME); | |
2060 | /* Created previously, this should NOT fail. */ | |
2061 | assert(uchan); | |
2062 | /* Remove from the channel list of the session. */ | |
2063 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
2064 | uchan); | |
2065 | trace_ust_destroy_channel(uchan); | |
2066 | } | |
bdf64013 | 2067 | end: |
b583ad83 | 2068 | lttng_event_context_destroy(ctx); |
2f77fc4b DG |
2069 | return ret; |
2070 | } | |
2071 | ||
dac8e046 JG |
2072 | static inline bool name_starts_with(const char *name, const char *prefix) |
2073 | { | |
2074 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
2075 | ||
2076 | return !strncmp(name, prefix, max_cmp_len); | |
2077 | } | |
2078 | ||
2079 | /* Perform userspace-specific event name validation */ | |
2080 | static int validate_ust_event_name(const char *name) | |
2081 | { | |
2082 | int ret = 0; | |
2083 | ||
2084 | if (!name) { | |
2085 | ret = -1; | |
2086 | goto end; | |
2087 | } | |
2088 | ||
2089 | /* | |
2090 | * Check name against all internal UST event component namespaces used | |
2091 | * by the agents. | |
2092 | */ | |
2093 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
2094 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
2095 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
2096 | ret = -1; | |
2097 | } | |
2098 | ||
2099 | end: | |
2100 | return ret; | |
2101 | } | |
88f06f15 | 2102 | |
2f77fc4b | 2103 | /* |
88f06f15 JG |
2104 | * Internal version of cmd_enable_event() with a supplemental |
2105 | * "internal_event" flag which is used to enable internal events which should | |
2106 | * be hidden from clients. Such events are used in the agent implementation to | |
2107 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 2108 | */ |
88f06f15 | 2109 | static int _cmd_enable_event(struct ltt_session *session, |
df4f5a87 | 2110 | const struct lttng_domain *domain, |
025faf73 | 2111 | char *channel_name, struct lttng_event *event, |
6b453b5e | 2112 | char *filter_expression, |
db8f1377 JI |
2113 | struct lttng_filter_bytecode *filter, |
2114 | struct lttng_event_exclusion *exclusion, | |
88f06f15 | 2115 | int wpipe, bool internal_event) |
2f77fc4b | 2116 | { |
9f449915 | 2117 | int ret = 0, channel_created = 0; |
cfedea03 | 2118 | struct lttng_channel *attr = NULL; |
2f77fc4b DG |
2119 | |
2120 | assert(session); | |
2121 | assert(event); | |
2122 | assert(channel_name); | |
2123 | ||
2a385866 JG |
2124 | /* If we have a filter, we must have its filter expression */ |
2125 | assert(!(!!filter_expression ^ !!filter)); | |
2126 | ||
9f449915 PP |
2127 | /* Normalize event name as a globbing pattern */ |
2128 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 2129 | |
9f449915 PP |
2130 | /* Normalize exclusion names as globbing patterns */ |
2131 | if (exclusion) { | |
2132 | size_t i; | |
f5ac4bd7 | 2133 | |
9f449915 PP |
2134 | for (i = 0; i < exclusion->count; i++) { |
2135 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
2136 | ||
2137 | strutils_normalize_star_glob_pattern(name); | |
2138 | } | |
930a2e99 JG |
2139 | } |
2140 | ||
9f449915 PP |
2141 | DBG("Enable event command for event \'%s\'", event->name); |
2142 | ||
2143 | rcu_read_lock(); | |
2144 | ||
7972aab2 | 2145 | switch (domain->type) { |
2f77fc4b DG |
2146 | case LTTNG_DOMAIN_KERNEL: |
2147 | { | |
2148 | struct ltt_kernel_channel *kchan; | |
2149 | ||
85076754 MD |
2150 | /* |
2151 | * If a non-default channel has been created in the | |
2152 | * session, explicitely require that -c chan_name needs | |
2153 | * to be provided. | |
2154 | */ | |
2155 | if (session->kernel_session->has_non_default_channel | |
2156 | && channel_name[0] == '\0') { | |
2157 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2158 | goto error; | |
2159 | } | |
2160 | ||
2f77fc4b DG |
2161 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2162 | session->kernel_session); | |
2163 | if (kchan == NULL) { | |
0a9c6494 DG |
2164 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
2165 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 2166 | if (attr == NULL) { |
f73fabfd | 2167 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2168 | goto error; |
2169 | } | |
04c17253 MD |
2170 | if (lttng_strncpy(attr->name, channel_name, |
2171 | sizeof(attr->name))) { | |
2172 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2173 | goto error; |
2174 | } | |
2f77fc4b | 2175 | |
33b9609d JR |
2176 | ret = cmd_enable_channel_internal( |
2177 | session, domain, attr, wpipe); | |
f73fabfd | 2178 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2179 | goto error; |
2180 | } | |
e5f5db7f | 2181 | channel_created = 1; |
2f77fc4b DG |
2182 | } |
2183 | ||
2184 | /* Get the newly created kernel channel pointer */ | |
2185 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2186 | session->kernel_session); | |
2187 | if (kchan == NULL) { | |
2188 | /* This sould not happen... */ | |
f73fabfd | 2189 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2190 | goto error; |
2191 | } | |
2192 | ||
6e911cad MD |
2193 | switch (event->type) { |
2194 | case LTTNG_EVENT_ALL: | |
29c62722 | 2195 | { |
00a62084 MD |
2196 | char *filter_expression_a = NULL; |
2197 | struct lttng_filter_bytecode *filter_a = NULL; | |
2198 | ||
2199 | /* | |
2200 | * We need to duplicate filter_expression and filter, | |
2201 | * because ownership is passed to first enable | |
2202 | * event. | |
2203 | */ | |
2204 | if (filter_expression) { | |
2205 | filter_expression_a = strdup(filter_expression); | |
2206 | if (!filter_expression_a) { | |
2207 | ret = LTTNG_ERR_FATAL; | |
2208 | goto error; | |
2209 | } | |
2210 | } | |
2211 | if (filter) { | |
2212 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
2213 | if (!filter_a) { | |
2214 | free(filter_expression_a); | |
2215 | ret = LTTNG_ERR_FATAL; | |
2216 | goto error; | |
2217 | } | |
2218 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
2219 | } | |
29c62722 | 2220 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
2221 | ret = event_kernel_enable_event(kchan, event, |
2222 | filter_expression, filter); | |
a969e101 MD |
2223 | /* We have passed ownership */ |
2224 | filter_expression = NULL; | |
2225 | filter = NULL; | |
29c62722 MD |
2226 | if (ret != LTTNG_OK) { |
2227 | if (channel_created) { | |
2228 | /* Let's not leak a useless channel. */ | |
2229 | kernel_destroy_channel(kchan); | |
2230 | } | |
00a62084 MD |
2231 | free(filter_expression_a); |
2232 | free(filter_a); | |
29c62722 MD |
2233 | goto error; |
2234 | } | |
2235 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
2236 | ret = event_kernel_enable_event(kchan, event, |
2237 | filter_expression_a, filter_a); | |
60d21fa2 AB |
2238 | /* We have passed ownership */ |
2239 | filter_expression_a = NULL; | |
2240 | filter_a = NULL; | |
29c62722 MD |
2241 | if (ret != LTTNG_OK) { |
2242 | goto error; | |
2243 | } | |
2244 | break; | |
2245 | } | |
6e6ef3d7 | 2246 | case LTTNG_EVENT_PROBE: |
dcabc190 | 2247 | case LTTNG_EVENT_USERSPACE_PROBE: |
6e6ef3d7 DG |
2248 | case LTTNG_EVENT_FUNCTION: |
2249 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 2250 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
2251 | ret = event_kernel_enable_event(kchan, event, |
2252 | filter_expression, filter); | |
a969e101 MD |
2253 | /* We have passed ownership */ |
2254 | filter_expression = NULL; | |
2255 | filter = NULL; | |
6e911cad MD |
2256 | if (ret != LTTNG_OK) { |
2257 | if (channel_created) { | |
2258 | /* Let's not leak a useless channel. */ | |
2259 | kernel_destroy_channel(kchan); | |
2260 | } | |
2261 | goto error; | |
e5f5db7f | 2262 | } |
6e911cad MD |
2263 | break; |
2264 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
2265 | ret = event_kernel_enable_event(kchan, event, |
2266 | filter_expression, filter); | |
a969e101 MD |
2267 | /* We have passed ownership */ |
2268 | filter_expression = NULL; | |
2269 | filter = NULL; | |
e2b957af MD |
2270 | if (ret != LTTNG_OK) { |
2271 | goto error; | |
2272 | } | |
6e911cad MD |
2273 | break; |
2274 | default: | |
2275 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
2276 | goto error; |
2277 | } | |
2278 | ||
7d268848 | 2279 | kernel_wait_quiescent(); |
2f77fc4b DG |
2280 | break; |
2281 | } | |
2282 | case LTTNG_DOMAIN_UST: | |
2283 | { | |
2284 | struct ltt_ust_channel *uchan; | |
2285 | struct ltt_ust_session *usess = session->ust_session; | |
2286 | ||
2287 | assert(usess); | |
2288 | ||
85076754 MD |
2289 | /* |
2290 | * If a non-default channel has been created in the | |
2291 | * session, explicitely require that -c chan_name needs | |
2292 | * to be provided. | |
2293 | */ | |
2294 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
2295 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2296 | goto error; | |
2297 | } | |
2298 | ||
2f77fc4b DG |
2299 | /* Get channel from global UST domain */ |
2300 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2301 | channel_name); | |
2302 | if (uchan == NULL) { | |
2303 | /* Create default channel */ | |
0a9c6494 DG |
2304 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
2305 | usess->buffer_type); | |
2f77fc4b | 2306 | if (attr == NULL) { |
f73fabfd | 2307 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2308 | goto error; |
2309 | } | |
04c17253 MD |
2310 | if (lttng_strncpy(attr->name, channel_name, |
2311 | sizeof(attr->name))) { | |
2312 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2313 | goto error; |
2314 | } | |
2f77fc4b | 2315 | |
33b9609d JR |
2316 | ret = cmd_enable_channel_internal( |
2317 | session, domain, attr, wpipe); | |
f73fabfd | 2318 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2319 | goto error; |
2320 | } | |
2f77fc4b DG |
2321 | |
2322 | /* Get the newly created channel reference back */ | |
2323 | uchan = trace_ust_find_channel_by_name( | |
2324 | usess->domain_global.channels, channel_name); | |
2325 | assert(uchan); | |
2326 | } | |
2327 | ||
141feb8c JG |
2328 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2329 | /* | |
2330 | * Don't allow users to add UST events to channels which | |
2331 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2332 | * Python, etc.). | |
2333 | */ | |
2334 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2335 | goto error; | |
2336 | } | |
2337 | ||
dac8e046 JG |
2338 | if (!internal_event) { |
2339 | /* | |
2340 | * Ensure the event name is not reserved for internal | |
2341 | * use. | |
2342 | */ | |
2343 | ret = validate_ust_event_name(event->name); | |
2344 | if (ret) { | |
2345 | WARN("Userspace event name %s failed validation.", | |
bbcab087 | 2346 | event->name); |
dac8e046 JG |
2347 | ret = LTTNG_ERR_INVALID_EVENT_NAME; |
2348 | goto error; | |
2349 | } | |
2350 | } | |
2351 | ||
2f77fc4b | 2352 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 2353 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
88f06f15 JG |
2354 | filter_expression, filter, exclusion, |
2355 | internal_event); | |
49d21f93 MD |
2356 | /* We have passed ownership */ |
2357 | filter_expression = NULL; | |
2358 | filter = NULL; | |
2359 | exclusion = NULL; | |
94382e15 JG |
2360 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2361 | goto already_enabled; | |
2362 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2363 | goto error; |
2364 | } | |
2365 | break; | |
2366 | } | |
5cdb6027 | 2367 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2368 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2369 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2370 | { |
da6c3a50 | 2371 | const char *default_event_name, *default_chan_name; |
fefd409b | 2372 | struct agent *agt; |
f20baf8e DG |
2373 | struct lttng_event uevent; |
2374 | struct lttng_domain tmp_dom; | |
2375 | struct ltt_ust_session *usess = session->ust_session; | |
2376 | ||
2377 | assert(usess); | |
2378 | ||
f28f9e44 JG |
2379 | if (!agent_tracing_is_enabled()) { |
2380 | DBG("Attempted to enable an event in an agent domain but the agent thread is not running"); | |
2381 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
2382 | goto error; | |
2383 | } | |
2384 | ||
5cdb6027 | 2385 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2386 | if (!agt) { |
5cdb6027 | 2387 | agt = agent_create(domain->type); |
fefd409b | 2388 | if (!agt) { |
e5b3c48c | 2389 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2390 | goto error; |
2391 | } | |
2392 | agent_add(agt, usess->agents); | |
2393 | } | |
2394 | ||
022d91ba | 2395 | /* Create the default tracepoint. */ |
996de3c7 | 2396 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2397 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2398 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
51755dc8 JG |
2399 | default_event_name = event_get_default_agent_ust_name( |
2400 | domain->type); | |
da6c3a50 | 2401 | if (!default_event_name) { |
e5b3c48c | 2402 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2403 | goto error; |
f43f95a9 | 2404 | } |
da6c3a50 | 2405 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2406 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2407 | ||
2408 | /* | |
2409 | * The domain type is changed because we are about to enable the | |
2410 | * default channel and event for the JUL domain that are hardcoded. | |
2411 | * This happens in the UST domain. | |
2412 | */ | |
2413 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2414 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2415 | ||
0e115563 DG |
2416 | switch (domain->type) { |
2417 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2418 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2419 | break; |
2420 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2421 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2422 | break; |
2423 | case LTTNG_DOMAIN_PYTHON: | |
2424 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2425 | break; | |
2426 | default: | |
e98a44b0 | 2427 | /* The switch/case we are in makes this impossible */ |
0e115563 | 2428 | assert(0); |
da6c3a50 DG |
2429 | } |
2430 | ||
971da06a | 2431 | { |
8404118c | 2432 | char *filter_expression_copy = NULL; |
51755dc8 | 2433 | struct lttng_filter_bytecode *filter_copy = NULL; |
971da06a JG |
2434 | |
2435 | if (filter) { | |
51755dc8 JG |
2436 | const size_t filter_size = sizeof( |
2437 | struct lttng_filter_bytecode) | |
2438 | + filter->len; | |
2439 | ||
2440 | filter_copy = zmalloc(filter_size); | |
971da06a | 2441 | if (!filter_copy) { |
018096a4 | 2442 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2443 | goto error; |
971da06a | 2444 | } |
51755dc8 | 2445 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2446 | |
8404118c JG |
2447 | filter_expression_copy = |
2448 | strdup(filter_expression); | |
2449 | if (!filter_expression) { | |
2450 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2451 | } |
2452 | ||
2453 | if (!filter_expression_copy || !filter_copy) { | |
2454 | free(filter_expression_copy); | |
2455 | free(filter_copy); | |
2456 | goto error; | |
8404118c | 2457 | } |
971da06a JG |
2458 | } |
2459 | ||
88f06f15 | 2460 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a | 2461 | (char *) default_chan_name, |
8404118c JG |
2462 | &uevent, filter_expression_copy, |
2463 | filter_copy, NULL, wpipe); | |
971da06a JG |
2464 | } |
2465 | ||
94382e15 JG |
2466 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2467 | goto already_enabled; | |
2468 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2469 | goto error; |
2470 | } | |
2471 | ||
2472 | /* The wild card * means that everything should be enabled. */ | |
2473 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8404118c JG |
2474 | ret = event_agent_enable_all(usess, agt, event, filter, |
2475 | filter_expression); | |
f20baf8e | 2476 | } else { |
8404118c JG |
2477 | ret = event_agent_enable(usess, agt, event, filter, |
2478 | filter_expression); | |
f20baf8e | 2479 | } |
51755dc8 JG |
2480 | filter = NULL; |
2481 | filter_expression = NULL; | |
f20baf8e DG |
2482 | if (ret != LTTNG_OK) { |
2483 | goto error; | |
2484 | } | |
2485 | ||
2486 | break; | |
2487 | } | |
2f77fc4b | 2488 | default: |
f73fabfd | 2489 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2490 | goto error; |
2491 | } | |
2492 | ||
f73fabfd | 2493 | ret = LTTNG_OK; |
2f77fc4b | 2494 | |
94382e15 | 2495 | already_enabled: |
2f77fc4b | 2496 | error: |
49d21f93 MD |
2497 | free(filter_expression); |
2498 | free(filter); | |
2499 | free(exclusion); | |
cf0bcb51 | 2500 | channel_attr_destroy(attr); |
2223c96f | 2501 | rcu_read_unlock(); |
2f77fc4b DG |
2502 | return ret; |
2503 | } | |
2504 | ||
88f06f15 JG |
2505 | /* |
2506 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2507 | * We own filter, exclusion, and filter_expression. | |
2508 | */ | |
166fc586 | 2509 | int cmd_enable_event(struct command_ctx *cmd_ctx, int sock, int wpipe) |
88f06f15 | 2510 | { |
166fc586 JR |
2511 | int ret; |
2512 | size_t event_len; | |
2513 | ssize_t sock_recv_len; | |
2514 | struct lttng_event *event = NULL; | |
2515 | struct lttng_buffer_view view; | |
2516 | struct lttng_dynamic_buffer event_buffer; | |
2517 | struct lttng_event_exclusion *exclusion = NULL; | |
2518 | struct lttng_filter_bytecode *bytecode = NULL; | |
2519 | char *filter_expression = NULL; | |
2520 | ||
2521 | lttng_dynamic_buffer_init(&event_buffer); | |
2522 | event_len = (size_t) cmd_ctx->lsm->u.enable.length; | |
2523 | ret = lttng_dynamic_buffer_set_size(&event_buffer, event_len); | |
2524 | if (ret) { | |
2525 | ret = LTTNG_ERR_NOMEM; | |
2526 | goto end; | |
2527 | } | |
2528 | ||
2529 | sock_recv_len = lttcomm_recv_unix_sock( | |
2530 | sock, event_buffer.data, event_len); | |
2531 | if (sock_recv_len < 0 || sock_recv_len != event_len) { | |
2532 | ERR("Failed to receive \"enable event\" command payload"); | |
2533 | ret = LTTNG_ERR_INVALID; | |
2534 | goto end; | |
2535 | } | |
2536 | ||
2537 | view = lttng_buffer_view_from_dynamic_buffer(&event_buffer, 0, -1); | |
2538 | ||
2539 | if (lttng_event_create_from_buffer(&view, &event, | |
2540 | &exclusion, &filter_expression, | |
2541 | &bytecode, sock) != event_len) { | |
2542 | ERR("Invalid event payload received in \"enable event\" command"); | |
2543 | ret = LTTNG_ERR_INVALID; | |
2544 | goto end; | |
2545 | } | |
2546 | ||
2547 | /* | |
2548 | * The ownership of the following parameters is transferred to | |
2549 | * _cmd_enable_event: | |
2550 | * | |
2551 | * - filter_expression, | |
2552 | * - bytecode, | |
2553 | * - exclusion | |
2554 | */ | |
2555 | ret = _cmd_enable_event(cmd_ctx->session, | |
2556 | ALIGNED_CONST_PTR(cmd_ctx->lsm->domain), | |
2557 | cmd_ctx->lsm->u.enable.channel_name, event, | |
2558 | filter_expression, bytecode, exclusion, wpipe, false); | |
2559 | filter_expression = NULL; | |
2560 | bytecode = NULL; | |
2561 | exclusion = NULL; | |
2562 | end: | |
2563 | lttng_event_destroy(event); | |
2564 | lttng_dynamic_buffer_reset(&event_buffer); | |
2565 | return ret; | |
88f06f15 JG |
2566 | } |
2567 | ||
2568 | /* | |
2569 | * Enable an event which is internal to LTTng. An internal should | |
2570 | * never be made visible to clients and are immune to checks such as | |
2571 | * reserved names. | |
2572 | */ | |
2573 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 2574 | const struct lttng_domain *domain, |
88f06f15 JG |
2575 | char *channel_name, struct lttng_event *event, |
2576 | char *filter_expression, | |
2577 | struct lttng_filter_bytecode *filter, | |
2578 | struct lttng_event_exclusion *exclusion, | |
2579 | int wpipe) | |
2580 | { | |
2581 | return _cmd_enable_event(session, domain, channel_name, event, | |
2582 | filter_expression, filter, exclusion, wpipe, true); | |
2583 | } | |
2584 | ||
2f77fc4b DG |
2585 | /* |
2586 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2587 | */ | |
166fc586 JR |
2588 | enum lttng_error_code cmd_list_tracepoints(enum lttng_domain_type domain, |
2589 | struct lttng_dynamic_buffer *buffer, unsigned int *nb_tracepoints) | |
2f77fc4b | 2590 | { |
166fc586 | 2591 | enum lttng_error_code ret_code; |
2f77fc4b | 2592 | int ret; |
166fc586 JR |
2593 | ssize_t i, nb_events = 0; |
2594 | struct lttng_event *events = NULL; | |
2595 | ||
2596 | assert(buffer); | |
2597 | assert(nb_tracepoints); | |
2f77fc4b DG |
2598 | |
2599 | switch (domain) { | |
2600 | case LTTNG_DOMAIN_KERNEL: | |
166fc586 | 2601 | nb_events = kernel_list_events(&events); |
2f77fc4b | 2602 | if (nb_events < 0) { |
166fc586 | 2603 | ret_code = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2604 | goto error; |
2605 | } | |
2606 | break; | |
2607 | case LTTNG_DOMAIN_UST: | |
166fc586 | 2608 | nb_events = ust_app_list_events(&events); |
2f77fc4b | 2609 | if (nb_events < 0) { |
166fc586 | 2610 | ret_code = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2611 | goto error; |
2612 | } | |
2613 | break; | |
5cdb6027 | 2614 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2615 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2616 | case LTTNG_DOMAIN_PYTHON: |
166fc586 | 2617 | nb_events = agent_list_events(&events, domain); |
3c6a091f | 2618 | if (nb_events < 0) { |
166fc586 | 2619 | ret_code = LTTNG_ERR_UST_LIST_FAIL; |
3c6a091f DG |
2620 | goto error; |
2621 | } | |
2622 | break; | |
2f77fc4b | 2623 | default: |
166fc586 | 2624 | ret_code = LTTNG_ERR_UND; |
2f77fc4b DG |
2625 | goto error; |
2626 | } | |
2627 | ||
2f77fc4b | 2628 | |
166fc586 JR |
2629 | for (i = 0; i < nb_events; i++) { |
2630 | ret = lttng_event_serialize(&events[i], 0, NULL, NULL, 0, NULL, | |
2631 | buffer, NULL); | |
2632 | if (ret) { | |
2633 | ret_code = LTTNG_ERR_NOMEM; | |
2634 | goto error; | |
2635 | } | |
2636 | } | |
2637 | ||
2638 | if (nb_events > UINT_MAX) { | |
2639 | ret_code = LTTNG_ERR_OVERFLOW; | |
2640 | goto error; | |
2641 | } | |
2642 | ||
2643 | *nb_tracepoints = (unsigned int) nb_events; | |
2644 | ret_code = LTTNG_OK; | |
2f77fc4b | 2645 | error: |
166fc586 JR |
2646 | free(events); |
2647 | return ret_code; | |
2f77fc4b DG |
2648 | } |
2649 | ||
2650 | /* | |
2651 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2652 | */ | |
56a37563 | 2653 | ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
2f77fc4b DG |
2654 | struct lttng_event_field **fields) |
2655 | { | |
2656 | int ret; | |
2657 | ssize_t nb_fields = 0; | |
2658 | ||
2659 | switch (domain) { | |
2660 | case LTTNG_DOMAIN_UST: | |
2661 | nb_fields = ust_app_list_event_fields(fields); | |
2662 | if (nb_fields < 0) { | |
f73fabfd | 2663 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2664 | goto error; |
2665 | } | |
2666 | break; | |
2667 | case LTTNG_DOMAIN_KERNEL: | |
2668 | default: /* fall-through */ | |
f73fabfd | 2669 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2670 | goto error; |
2671 | } | |
2672 | ||
2673 | return nb_fields; | |
2674 | ||
2675 | error: | |
2676 | /* Return negative value to differentiate return code */ | |
2677 | return -ret; | |
2678 | } | |
2679 | ||
166fc586 JR |
2680 | enum lttng_error_code cmd_list_syscalls( |
2681 | struct lttng_dynamic_buffer *buffer, unsigned int *nb_syscalls) | |
834978fd | 2682 | { |
166fc586 JR |
2683 | enum lttng_error_code ret_code; |
2684 | ssize_t nb_events, i; | |
2685 | int ret; | |
2686 | struct lttng_event *events = NULL; | |
2687 | ||
2688 | assert(buffer); | |
2689 | assert(nb_syscalls); | |
2690 | ||
2691 | nb_events = syscall_table_list(&events); | |
2692 | if (nb_events < 0) { | |
2693 | ret_code = (enum lttng_error_code) -nb_events; | |
2694 | goto end; | |
2695 | } | |
2696 | ||
2697 | for (i = 0; i < nb_events; i++) { | |
2698 | ret = lttng_event_serialize(&events[i], 0, NULL, NULL, 0, NULL, | |
2699 | buffer, NULL); | |
2700 | if (ret) { | |
2701 | ret_code = LTTNG_ERR_NOMEM; | |
2702 | goto end; | |
2703 | } | |
2704 | } | |
2705 | ||
2706 | if (nb_events > UINT_MAX) { | |
2707 | ret_code = LTTNG_ERR_OVERFLOW; | |
2708 | goto end; | |
2709 | } | |
2710 | ||
2711 | *nb_syscalls = (uint32_t) nb_events; | |
2712 | ret_code = LTTNG_OK; | |
2713 | end: | |
2714 | free(events); | |
2715 | return ret_code; | |
834978fd DG |
2716 | } |
2717 | ||
2f77fc4b DG |
2718 | /* |
2719 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2720 | * |
2721 | * Called with session mutex held. | |
2f77fc4b DG |
2722 | */ |
2723 | int cmd_start_trace(struct ltt_session *session) | |
2724 | { | |
82b69413 | 2725 | enum lttng_error_code ret; |
cde3e505 | 2726 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2727 | struct ltt_kernel_session *ksession; |
2728 | struct ltt_ust_session *usess; | |
1f496244 JG |
2729 | const bool session_rotated_after_last_stop = |
2730 | session->rotated_after_last_stop; | |
b02f5986 MD |
2731 | const bool session_cleared_after_last_stop = |
2732 | session->cleared_after_last_stop; | |
2f77fc4b DG |
2733 | |
2734 | assert(session); | |
2735 | ||
2736 | /* Ease our life a bit ;) */ | |
2737 | ksession = session->kernel_session; | |
2738 | usess = session->ust_session; | |
2739 | ||
8382cf6f DG |
2740 | /* Is the session already started? */ |
2741 | if (session->active) { | |
f73fabfd | 2742 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
7a24ece3 JR |
2743 | /* Perform nothing */ |
2744 | goto end; | |
2f77fc4b DG |
2745 | } |
2746 | ||
1f496244 JG |
2747 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING && |
2748 | !session->current_trace_chunk) { | |
2749 | /* | |
2750 | * A rotation was launched while the session was stopped and | |
2751 | * it has not been completed yet. It is not possible to start | |
2752 | * the session since starting the session here would require a | |
2753 | * rotation from "NULL" to a new trace chunk. That rotation | |
2754 | * would overlap with the ongoing rotation, which is not | |
2755 | * supported. | |
2756 | */ | |
2757 | WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing", | |
2758 | session->name); | |
2759 | ret = LTTNG_ERR_ROTATION_PENDING; | |
2760 | goto error; | |
2761 | } | |
2762 | ||
cde3e505 DG |
2763 | /* |
2764 | * Starting a session without channel is useless since after that it's not | |
2765 | * possible to enable channel thus inform the client. | |
2766 | */ | |
2767 | if (usess && usess->domain_global.channels) { | |
2768 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2769 | } | |
2770 | if (ksession) { | |
2771 | nb_chan += ksession->channel_count; | |
2772 | } | |
2773 | if (!nb_chan) { | |
2774 | ret = LTTNG_ERR_NO_CHANNEL; | |
2775 | goto error; | |
2776 | } | |
2777 | ||
1f496244 JG |
2778 | session->active = 1; |
2779 | session->rotated_after_last_stop = false; | |
b02f5986 | 2780 | session->cleared_after_last_stop = false; |
070b6a86 | 2781 | if (session->output_traces && !session->current_trace_chunk) { |
1f496244 JG |
2782 | if (!session->has_been_started) { |
2783 | struct lttng_trace_chunk *trace_chunk; | |
2784 | ||
2785 | DBG("Creating initial trace chunk of session \"%s\"", | |
2786 | session->name); | |
2787 | trace_chunk = session_create_new_trace_chunk( | |
2788 | session, NULL, NULL, NULL); | |
2789 | if (!trace_chunk) { | |
2790 | ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
2791 | goto error; | |
2792 | } | |
2793 | assert(!session->current_trace_chunk); | |
2794 | ret = session_set_trace_chunk(session, trace_chunk, | |
2795 | NULL); | |
2796 | lttng_trace_chunk_put(trace_chunk); | |
2797 | if (ret) { | |
2798 | ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
2799 | goto error; | |
2800 | } | |
2801 | } else { | |
2802 | DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk", | |
2803 | session->name); | |
2804 | /* | |
2805 | * Rotate existing streams into the new chunk. | |
2806 | * This is a "quiet" rotation has no client has | |
2807 | * explicitly requested this operation. | |
2808 | * | |
2809 | * There is also no need to wait for the rotation | |
2810 | * to complete as it will happen immediately. No data | |
2811 | * was produced as the session was stopped, so the | |
2812 | * rotation should happen on reception of the command. | |
2813 | */ | |
343defc2 MD |
2814 | ret = cmd_rotate_session(session, NULL, true, |
2815 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
1f496244 JG |
2816 | if (ret != LTTNG_OK) { |
2817 | goto error; | |
2818 | } | |
5c408ad8 | 2819 | } |
c996624c JD |
2820 | } |
2821 | ||
2f77fc4b DG |
2822 | /* Kernel tracing */ |
2823 | if (ksession != NULL) { | |
c996624c | 2824 | DBG("Start kernel tracing session %s", session->name); |
7d268848 | 2825 | ret = start_kernel_session(ksession); |
9b6c7ec5 | 2826 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2827 | goto error; |
2828 | } | |
2f77fc4b DG |
2829 | } |
2830 | ||
2831 | /* Flag session that trace should start automatically */ | |
2832 | if (usess) { | |
82b69413 JG |
2833 | int int_ret = ust_app_start_trace_all(usess); |
2834 | ||
2835 | if (int_ret < 0) { | |
f73fabfd | 2836 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2837 | goto error; |
2838 | } | |
2839 | } | |
2840 | ||
1223361a JG |
2841 | /* |
2842 | * Open a packet in every stream of the session to ensure that viewers | |
2843 | * can correctly identify the boundaries of the periods during which | |
2844 | * tracing was active for this session. | |
2845 | */ | |
2846 | ret = session_open_packets(session); | |
2847 | if (ret != LTTNG_OK) { | |
2848 | goto error; | |
2849 | } | |
2850 | ||
5c408ad8 JD |
2851 | /* |
2852 | * Clear the flag that indicates that a rotation was done while the | |
2853 | * session was stopped. | |
2854 | */ | |
2855 | session->rotated_after_last_stop = false; | |
2856 | ||
259c2674 | 2857 | if (session->rotate_timer_period) { |
82b69413 JG |
2858 | int int_ret = timer_session_rotation_schedule_timer_start( |
2859 | session, session->rotate_timer_period); | |
2860 | ||
2861 | if (int_ret < 0) { | |
259c2674 JD |
2862 | ERR("Failed to enable rotate timer"); |
2863 | ret = LTTNG_ERR_UNK; | |
2864 | goto error; | |
2865 | } | |
2866 | } | |
2867 | ||
f73fabfd | 2868 | ret = LTTNG_OK; |
2f77fc4b DG |
2869 | |
2870 | error: | |
1f496244 JG |
2871 | if (ret == LTTNG_OK) { |
2872 | /* Flag this after a successful start. */ | |
2873 | session->has_been_started |= 1; | |
2874 | } else { | |
2875 | session->active = 0; | |
2876 | /* Restore initial state on error. */ | |
2877 | session->rotated_after_last_stop = | |
2878 | session_rotated_after_last_stop; | |
b02f5986 MD |
2879 | session->cleared_after_last_stop = |
2880 | session_cleared_after_last_stop; | |
1f496244 | 2881 | } |
7a24ece3 | 2882 | end: |
2f77fc4b DG |
2883 | return ret; |
2884 | } | |
2885 | ||
2886 | /* | |
2887 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2888 | */ | |
2889 | int cmd_stop_trace(struct ltt_session *session) | |
2890 | { | |
2891 | int ret; | |
2f77fc4b DG |
2892 | struct ltt_kernel_session *ksession; |
2893 | struct ltt_ust_session *usess; | |
2894 | ||
2895 | assert(session); | |
2896 | ||
4dbe1875 | 2897 | DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
2f77fc4b DG |
2898 | /* Short cut */ |
2899 | ksession = session->kernel_session; | |
2900 | usess = session->ust_session; | |
2901 | ||
8382cf6f DG |
2902 | /* Session is not active. Skip everythong and inform the client. */ |
2903 | if (!session->active) { | |
f73fabfd | 2904 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2905 | goto error; |
2906 | } | |
2907 | ||
4dbe1875 MD |
2908 | ret = stop_kernel_session(ksession); |
2909 | if (ret != LTTNG_OK) { | |
2910 | goto error; | |
2f77fc4b DG |
2911 | } |
2912 | ||
14fb1ebe | 2913 | if (usess && usess->active) { |
2f77fc4b DG |
2914 | ret = ust_app_stop_trace_all(usess); |
2915 | if (ret < 0) { | |
f73fabfd | 2916 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2917 | goto error; |
2918 | } | |
2919 | } | |
2920 | ||
4dbe1875 MD |
2921 | DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name, |
2922 | session->id); | |
8382cf6f DG |
2923 | /* Flag inactive after a successful stop. */ |
2924 | session->active = 0; | |
4dbe1875 | 2925 | ret = LTTNG_OK; |
2f77fc4b DG |
2926 | |
2927 | error: | |
2928 | return ret; | |
2929 | } | |
2930 | ||
2931 | /* | |
433f5ba9 JR |
2932 | * Set the base_path of the session only if subdir of a control uris is set. |
2933 | * Return LTTNG_OK on success, otherwise LTTNG_ERR_*. | |
2f77fc4b | 2934 | */ |
433f5ba9 JR |
2935 | static int set_session_base_path_from_uris(struct ltt_session *session, |
2936 | size_t nb_uri, | |
bda32d56 | 2937 | struct lttng_uri *uris) |
2f77fc4b | 2938 | { |
433f5ba9 JR |
2939 | int ret; |
2940 | size_t i; | |
2f77fc4b | 2941 | |
e3876bf0 JR |
2942 | for (i = 0; i < nb_uri; i++) { |
2943 | if (uris[i].stype != LTTNG_STREAM_CONTROL || | |
2944 | uris[i].subdir[0] == '\0') { | |
2945 | /* Not interested in these URIs */ | |
2946 | continue; | |
2947 | } | |
2948 | ||
2949 | if (session->base_path != NULL) { | |
2950 | free(session->base_path); | |
2951 | session->base_path = NULL; | |
2952 | } | |
2953 | ||
2954 | /* Set session base_path */ | |
2955 | session->base_path = strdup(uris[i].subdir); | |
2956 | if (!session->base_path) { | |
433f5ba9 JR |
2957 | PERROR("Failed to copy base path \"%s\" to session \"%s\"", |
2958 | uris[i].subdir, session->name); | |
2959 | ret = LTTNG_ERR_NOMEM; | |
e3876bf0 JR |
2960 | goto error; |
2961 | } | |
433f5ba9 JR |
2962 | DBG2("Setting base path \"%s\" for session \"%s\"", |
2963 | session->base_path, session->name); | |
2964 | } | |
2965 | ret = LTTNG_OK; | |
2966 | error: | |
2967 | return ret; | |
2968 | } | |
2969 | ||
2970 | /* | |
2971 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2972 | */ | |
2973 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, | |
2974 | struct lttng_uri *uris) | |
2975 | { | |
2976 | int ret, i; | |
2977 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2978 | struct ltt_ust_session *usess = session->ust_session; | |
2979 | ||
2980 | assert(session); | |
2981 | assert(uris); | |
2982 | assert(nb_uri > 0); | |
2983 | ||
2984 | /* Can't set consumer URI if the session is active. */ | |
2985 | if (session->active) { | |
2986 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2987 | goto error; | |
2988 | } | |
2989 | ||
2990 | /* | |
2991 | * Set the session base path if any. This is done inside | |
2992 | * cmd_set_consumer_uri to preserve backward compatibility of the | |
2993 | * previous session creation api vs the session descriptor api. | |
2994 | */ | |
2995 | ret = set_session_base_path_from_uris(session, nb_uri, uris); | |
2996 | if (ret != LTTNG_OK) { | |
2997 | goto error; | |
e3876bf0 JR |
2998 | } |
2999 | ||
bda32d56 | 3000 | /* Set the "global" consumer URIs */ |
2f77fc4b | 3001 | for (i = 0; i < nb_uri; i++) { |
e3876bf0 JR |
3002 | ret = add_uri_to_consumer(session, session->consumer, &uris[i], |
3003 | LTTNG_DOMAIN_NONE); | |
a74934ba | 3004 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
3005 | goto error; |
3006 | } | |
2f77fc4b DG |
3007 | } |
3008 | ||
bda32d56 JG |
3009 | /* Set UST session URIs */ |
3010 | if (session->ust_session) { | |
3011 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 3012 | ret = add_uri_to_consumer(session, |
bda32d56 | 3013 | session->ust_session->consumer, |
b178f53e | 3014 | &uris[i], LTTNG_DOMAIN_UST); |
bda32d56 JG |
3015 | if (ret != LTTNG_OK) { |
3016 | goto error; | |
3017 | } | |
3018 | } | |
3019 | } | |
3020 | ||
3021 | /* Set kernel session URIs */ | |
3022 | if (session->kernel_session) { | |
3023 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 3024 | ret = add_uri_to_consumer(session, |
bda32d56 | 3025 | session->kernel_session->consumer, |
b178f53e | 3026 | &uris[i], LTTNG_DOMAIN_KERNEL); |
bda32d56 JG |
3027 | if (ret != LTTNG_OK) { |
3028 | goto error; | |
3029 | } | |
3030 | } | |
3031 | } | |
3032 | ||
7ab70fe0 DG |
3033 | /* |
3034 | * Make sure to set the session in output mode after we set URI since a | |
3035 | * session can be created without URL (thus flagged in no output mode). | |
3036 | */ | |
3037 | session->output_traces = 1; | |
3038 | if (ksess) { | |
3039 | ksess->output_traces = 1; | |
bda32d56 JG |
3040 | } |
3041 | ||
3042 | if (usess) { | |
7ab70fe0 DG |
3043 | usess->output_traces = 1; |
3044 | } | |
3045 | ||
2f77fc4b | 3046 | /* All good! */ |
f73fabfd | 3047 | ret = LTTNG_OK; |
2f77fc4b DG |
3048 | |
3049 | error: | |
3050 | return ret; | |
3051 | } | |
3052 | ||
b178f53e JG |
3053 | static |
3054 | enum lttng_error_code set_session_output_from_descriptor( | |
3055 | struct ltt_session *session, | |
3056 | const struct lttng_session_descriptor *descriptor) | |
2f77fc4b DG |
3057 | { |
3058 | int ret; | |
b178f53e JG |
3059 | enum lttng_error_code ret_code = LTTNG_OK; |
3060 | enum lttng_session_descriptor_type session_type = | |
3061 | lttng_session_descriptor_get_type(descriptor); | |
3062 | enum lttng_session_descriptor_output_type output_type = | |
3063 | lttng_session_descriptor_get_output_type(descriptor); | |
3064 | struct lttng_uri uris[2] = {}; | |
3065 | size_t uri_count = 0; | |
3066 | ||
3067 | switch (output_type) { | |
3068 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: | |
3069 | goto end; | |
3070 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: | |
3071 | lttng_session_descriptor_get_local_output_uri(descriptor, | |
3072 | &uris[0]); | |
3073 | uri_count = 1; | |
3074 | break; | |
3075 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: | |
3076 | lttng_session_descriptor_get_network_output_uris(descriptor, | |
3077 | &uris[0], &uris[1]); | |
3078 | uri_count = 2; | |
3079 | break; | |
3080 | default: | |
3081 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3082 | goto end; |
2f77fc4b DG |
3083 | } |
3084 | ||
b178f53e JG |
3085 | switch (session_type) { |
3086 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3087 | { | |
3088 | struct snapshot_output *new_output = NULL; | |
3089 | ||
3090 | new_output = snapshot_output_alloc(); | |
3091 | if (!new_output) { | |
3092 | ret_code = LTTNG_ERR_NOMEM; | |
3093 | goto end; | |
3094 | } | |
3095 | ||
3096 | ret = snapshot_output_init_with_uri(session, | |
3097 | DEFAULT_SNAPSHOT_MAX_SIZE, | |
3098 | NULL, uris, uri_count, session->consumer, | |
3099 | new_output, &session->snapshot); | |
3100 | if (ret < 0) { | |
3101 | ret_code = (ret == -ENOMEM) ? | |
3102 | LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID; | |
3103 | snapshot_output_destroy(new_output); | |
3104 | goto end; | |
3105 | } | |
3106 | snapshot_add_output(&session->snapshot, new_output); | |
3107 | break; | |
3108 | } | |
3109 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: | |
3110 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3111 | { | |
3112 | ret_code = cmd_set_consumer_uri(session, uri_count, uris); | |
3113 | break; | |
3114 | } | |
3115 | default: | |
3116 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3117 | goto end; |
2f77fc4b | 3118 | } |
b178f53e JG |
3119 | end: |
3120 | return ret_code; | |
3121 | } | |
3122 | ||
3123 | static | |
3124 | enum lttng_error_code cmd_create_session_from_descriptor( | |
3125 | struct lttng_session_descriptor *descriptor, | |
3126 | const lttng_sock_cred *creds, | |
3127 | const char *home_path) | |
3128 | { | |
3129 | int ret; | |
3130 | enum lttng_error_code ret_code; | |
3131 | const char *session_name; | |
3132 | struct ltt_session *new_session = NULL; | |
3133 | enum lttng_session_descriptor_status descriptor_status; | |
2f77fc4b | 3134 | |
e32d7f27 | 3135 | session_lock_list(); |
b178f53e JG |
3136 | if (home_path) { |
3137 | if (*home_path != '/') { | |
3138 | ERR("Home path provided by client is not absolute"); | |
3139 | ret_code = LTTNG_ERR_INVALID; | |
3140 | goto end; | |
3141 | } | |
3142 | } | |
2f77fc4b | 3143 | |
b178f53e JG |
3144 | descriptor_status = lttng_session_descriptor_get_session_name( |
3145 | descriptor, &session_name); | |
3146 | switch (descriptor_status) { | |
3147 | case LTTNG_SESSION_DESCRIPTOR_STATUS_OK: | |
3148 | break; | |
3149 | case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET: | |
3150 | session_name = NULL; | |
3151 | break; | |
3152 | default: | |
3153 | ret_code = LTTNG_ERR_INVALID; | |
3154 | goto end; | |
3155 | } | |
e3876bf0 | 3156 | |
b178f53e | 3157 | ret_code = session_create(session_name, creds->uid, creds->gid, |
e3876bf0 | 3158 | &new_session); |
b178f53e | 3159 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3160 | goto end; |
2f77fc4b DG |
3161 | } |
3162 | ||
b178f53e JG |
3163 | if (!session_name) { |
3164 | ret = lttng_session_descriptor_set_session_name(descriptor, | |
3165 | new_session->name); | |
3166 | if (ret) { | |
3167 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3168 | goto end; | |
3169 | } | |
3170 | } | |
3171 | ||
3172 | if (!lttng_session_descriptor_is_output_destination_initialized( | |
3173 | descriptor)) { | |
3174 | /* | |
3175 | * Only include the session's creation time in the output | |
3176 | * destination if the name of the session itself was | |
3177 | * not auto-generated. | |
3178 | */ | |
3179 | ret_code = lttng_session_descriptor_set_default_output( | |
3180 | descriptor, | |
3181 | session_name ? &new_session->creation_time : NULL, | |
3182 | home_path); | |
3183 | if (ret_code != LTTNG_OK) { | |
e32d7f27 | 3184 | goto end; |
2bba9e53 | 3185 | } |
2bba9e53 | 3186 | } else { |
b178f53e JG |
3187 | new_session->has_user_specified_directory = |
3188 | lttng_session_descriptor_has_output_directory( | |
3189 | descriptor); | |
2f77fc4b DG |
3190 | } |
3191 | ||
b178f53e JG |
3192 | switch (lttng_session_descriptor_get_type(descriptor)) { |
3193 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3194 | new_session->snapshot_mode = 1; | |
3195 | break; | |
3196 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3197 | new_session->live_timer = | |
3198 | lttng_session_descriptor_live_get_timer_interval( | |
3199 | descriptor); | |
3200 | break; | |
3201 | default: | |
3202 | break; | |
3203 | } | |
2f77fc4b | 3204 | |
b178f53e JG |
3205 | ret_code = set_session_output_from_descriptor(new_session, descriptor); |
3206 | if (ret_code != LTTNG_OK) { | |
3207 | goto end; | |
3208 | } | |
3209 | new_session->consumer->enabled = 1; | |
3210 | ret_code = LTTNG_OK; | |
e32d7f27 | 3211 | end: |
b178f53e JG |
3212 | /* Release reference provided by the session_create function. */ |
3213 | session_put(new_session); | |
3214 | if (ret_code != LTTNG_OK && new_session) { | |
3215 | /* Release the global reference on error. */ | |
3216 | session_destroy(new_session); | |
e32d7f27 | 3217 | } |
b178f53e JG |
3218 | session_unlock_list(); |
3219 | return ret_code; | |
2f77fc4b DG |
3220 | } |
3221 | ||
b178f53e JG |
3222 | enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock, |
3223 | struct lttng_session_descriptor **return_descriptor) | |
27babd3a DG |
3224 | { |
3225 | int ret; | |
b178f53e JG |
3226 | size_t payload_size; |
3227 | struct lttng_dynamic_buffer payload; | |
3228 | struct lttng_buffer_view home_dir_view; | |
3229 | struct lttng_buffer_view session_descriptor_view; | |
3230 | struct lttng_session_descriptor *session_descriptor = NULL; | |
3231 | enum lttng_error_code ret_code; | |
3232 | ||
3233 | lttng_dynamic_buffer_init(&payload); | |
3234 | if (cmd_ctx->lsm->u.create_session.home_dir_size >= | |
3235 | LTTNG_PATH_MAX) { | |
3236 | ret_code = LTTNG_ERR_INVALID; | |
3237 | goto error; | |
27babd3a | 3238 | } |
b178f53e JG |
3239 | if (cmd_ctx->lsm->u.create_session.session_descriptor_size > |
3240 | LTTNG_SESSION_DESCRIPTOR_MAX_LEN) { | |
3241 | ret_code = LTTNG_ERR_INVALID; | |
3242 | goto error; | |
27babd3a DG |
3243 | } |
3244 | ||
b178f53e JG |
3245 | payload_size = cmd_ctx->lsm->u.create_session.home_dir_size + |
3246 | cmd_ctx->lsm->u.create_session.session_descriptor_size; | |
3247 | ret = lttng_dynamic_buffer_set_size(&payload, payload_size); | |
3248 | if (ret) { | |
3249 | ret_code = LTTNG_ERR_NOMEM; | |
3250 | goto error; | |
27babd3a DG |
3251 | } |
3252 | ||
b178f53e JG |
3253 | ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size); |
3254 | if (ret <= 0) { | |
3255 | ERR("Reception of session descriptor failed, aborting."); | |
3256 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3257 | goto error; | |
27babd3a DG |
3258 | } |
3259 | ||
b178f53e JG |
3260 | home_dir_view = lttng_buffer_view_from_dynamic_buffer( |
3261 | &payload, | |
3262 | 0, | |
3263 | cmd_ctx->lsm->u.create_session.home_dir_size); | |
3264 | session_descriptor_view = lttng_buffer_view_from_dynamic_buffer( | |
3265 | &payload, | |
3266 | cmd_ctx->lsm->u.create_session.home_dir_size, | |
3267 | cmd_ctx->lsm->u.create_session.session_descriptor_size); | |
27babd3a | 3268 | |
b178f53e JG |
3269 | ret = lttng_session_descriptor_create_from_buffer( |
3270 | &session_descriptor_view, &session_descriptor); | |
3271 | if (ret < 0) { | |
3272 | ERR("Failed to create session descriptor from payload of \"create session\" command"); | |
3273 | ret_code = LTTNG_ERR_INVALID; | |
3274 | goto error; | |
3275 | } | |
27babd3a | 3276 | |
b178f53e JG |
3277 | /* |
3278 | * Sets the descriptor's auto-generated properties (name, output) if | |
3279 | * needed. | |
3280 | */ | |
3281 | ret_code = cmd_create_session_from_descriptor(session_descriptor, | |
3282 | &cmd_ctx->creds, | |
3283 | home_dir_view.size ? home_dir_view.data : NULL); | |
3284 | if (ret_code != LTTNG_OK) { | |
3285 | goto error; | |
e32d7f27 | 3286 | } |
b178f53e JG |
3287 | |
3288 | ret_code = LTTNG_OK; | |
3289 | *return_descriptor = session_descriptor; | |
3290 | session_descriptor = NULL; | |
3291 | error: | |
3292 | lttng_dynamic_buffer_reset(&payload); | |
3293 | lttng_session_descriptor_destroy(session_descriptor); | |
3294 | return ret_code; | |
27babd3a DG |
3295 | } |
3296 | ||
3e3665b8 JG |
3297 | static |
3298 | void cmd_destroy_session_reply(const struct ltt_session *session, | |
3299 | void *_reply_context) | |
3300 | { | |
3301 | int ret; | |
3302 | ssize_t comm_ret; | |
3303 | const struct cmd_destroy_session_reply_context *reply_context = | |
3304 | _reply_context; | |
3305 | struct lttng_dynamic_buffer payload; | |
3306 | struct lttcomm_session_destroy_command_header cmd_header; | |
3307 | struct lttng_trace_archive_location *location = NULL; | |
3308 | struct lttcomm_lttng_msg llm = { | |
3309 | .cmd_type = LTTNG_DESTROY_SESSION, | |
3285a971 | 3310 | .ret_code = reply_context->destruction_status, |
3e3665b8 JG |
3311 | .pid = UINT32_MAX, |
3312 | .cmd_header_size = | |
3313 | sizeof(struct lttcomm_session_destroy_command_header), | |
3314 | .data_size = 0, | |
3315 | }; | |
3316 | size_t payload_size_before_location; | |
3317 | ||
3318 | lttng_dynamic_buffer_init(&payload); | |
3319 | ||
3320 | ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm)); | |
3321 | if (ret) { | |
3322 | ERR("Failed to append session destruction message"); | |
3323 | goto error; | |
3324 | } | |
3325 | ||
3326 | cmd_header.rotation_state = | |
3327 | (int32_t) (reply_context->implicit_rotation_on_destroy ? | |
3328 | session->rotation_state : | |
3329 | LTTNG_ROTATION_STATE_NO_ROTATION); | |
3330 | ret = lttng_dynamic_buffer_append(&payload, &cmd_header, | |
3331 | sizeof(cmd_header)); | |
3332 | if (ret) { | |
3333 | ERR("Failed to append session destruction command header"); | |
3334 | goto error; | |
3335 | } | |
3336 | ||
3337 | if (!reply_context->implicit_rotation_on_destroy) { | |
3338 | DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply", | |
3339 | session->name); | |
3340 | goto send_reply; | |
3341 | } | |
3342 | if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) { | |
3343 | DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply", | |
3344 | session->name); | |
3345 | goto send_reply; | |
3346 | } | |
3347 | ||
3348 | location = session_get_trace_archive_location(session); | |
3349 | if (!location) { | |
3350 | ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"", | |
3351 | session->name); | |
3352 | goto error; | |
3353 | } | |
3354 | ||
3355 | payload_size_before_location = payload.size; | |
3356 | comm_ret = lttng_trace_archive_location_serialize(location, | |
3357 | &payload); | |
b0563fed | 3358 | lttng_trace_archive_location_put(location); |
3e3665b8 JG |
3359 | if (comm_ret < 0) { |
3360 | ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"", | |
3361 | session->name); | |
3362 | goto error; | |
3363 | } | |
3364 | /* Update the message to indicate the location's length. */ | |
3365 | ((struct lttcomm_lttng_msg *) payload.data)->data_size = | |
3366 | payload.size - payload_size_before_location; | |
3367 | send_reply: | |
3368 | comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd, | |
3369 | payload.data, payload.size); | |
3370 | if (comm_ret != (ssize_t) payload.size) { | |
3371 | ERR("Failed to send result of the destruction of session \"%s\" to client", | |
3372 | session->name); | |
3373 | } | |
3374 | error: | |
3375 | ret = close(reply_context->reply_sock_fd); | |
3376 | if (ret) { | |
3377 | PERROR("Failed to close client socket in deferred session destroy reply"); | |
3378 | } | |
3379 | lttng_dynamic_buffer_reset(&payload); | |
3380 | free(_reply_context); | |
3381 | } | |
3382 | ||
2f77fc4b DG |
3383 | /* |
3384 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
3385 | * |
3386 | * Called with session lock held. | |
2f77fc4b | 3387 | */ |
e32d7f27 | 3388 | int cmd_destroy_session(struct ltt_session *session, |
3e3665b8 JG |
3389 | struct notification_thread_handle *notification_thread_handle, |
3390 | int *sock_fd) | |
2f77fc4b DG |
3391 | { |
3392 | int ret; | |
3285a971 | 3393 | enum lttng_error_code destruction_last_error = LTTNG_OK; |
3e3665b8 JG |
3394 | struct cmd_destroy_session_reply_context *reply_context = NULL; |
3395 | ||
3396 | if (sock_fd) { | |
3397 | reply_context = zmalloc(sizeof(*reply_context)); | |
3398 | if (!reply_context) { | |
3399 | ret = LTTNG_ERR_NOMEM; | |
3400 | goto end; | |
3401 | } | |
3402 | reply_context->reply_sock_fd = *sock_fd; | |
3403 | } | |
2f77fc4b DG |
3404 | |
3405 | /* Safety net */ | |
3406 | assert(session); | |
3407 | ||
3e3665b8 JG |
3408 | DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, |
3409 | session->id); | |
3410 | if (session->active) { | |
3411 | DBG("Session \"%s\" is active, attempting to stop it before destroying it", | |
3412 | session->name); | |
3413 | ret = cmd_stop_trace(session); | |
3414 | if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
3415 | /* Carry on with the destruction of the session. */ | |
3416 | ERR("Failed to stop session \"%s\" as part of its destruction: %s", | |
3417 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3418 | destruction_last_error = ret; |
3e3665b8 JG |
3419 | } |
3420 | } | |
5c408ad8 | 3421 | |
92816cc3 JG |
3422 | if (session->rotation_schedule_timer_enabled) { |
3423 | if (timer_session_rotation_schedule_timer_stop( | |
3424 | session)) { | |
3425 | ERR("Failed to stop the \"rotation schedule\" timer of session %s", | |
3426 | session->name); | |
3285a971 | 3427 | destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR; |
92816cc3 | 3428 | } |
259c2674 JD |
3429 | } |
3430 | ||
90936dcf JD |
3431 | if (session->rotate_size) { |
3432 | unsubscribe_session_consumed_size_rotation(session, notification_thread_handle); | |
3433 | session->rotate_size = 0; | |
3434 | } | |
3435 | ||
a7ceb342 | 3436 | if (session->rotated && session->current_trace_chunk && session->output_traces) { |
b5893d8e JG |
3437 | /* |
3438 | * Perform a last rotation on destruction if rotations have | |
3439 | * occurred during the session's lifetime. | |
3440 | */ | |
343defc2 MD |
3441 | ret = cmd_rotate_session(session, NULL, false, |
3442 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
d2956687 JG |
3443 | if (ret != LTTNG_OK) { |
3444 | ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s", | |
3445 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3446 | destruction_last_error = -ret; |
124473a3 | 3447 | } |
3e3665b8 JG |
3448 | if (reply_context) { |
3449 | reply_context->implicit_rotation_on_destroy = true; | |
3450 | } | |
070b6a86 | 3451 | } else if (session->has_been_started && session->current_trace_chunk) { |
7fdbed1c JG |
3452 | /* |
3453 | * The user has not triggered a session rotation. However, to | |
3454 | * ensure all data has been consumed, the session is rotated | |
3455 | * to a 'null' trace chunk before it is destroyed. | |
3456 | * | |
3457 | * This is a "quiet" rotation meaning that no notification is | |
3458 | * emitted and no renaming of the current trace chunk takes | |
3459 | * place. | |
3460 | */ | |
343defc2 MD |
3461 | ret = cmd_rotate_session(session, NULL, true, |
3462 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
407d6c7b JG |
3463 | /* |
3464 | * Rotation operations may not be supported by the kernel | |
3465 | * tracer. Hence, do not consider this implicit rotation as | |
3466 | * a session destruction error. The library has already stopped | |
3467 | * the session and waited for pending data; there is nothing | |
3468 | * left to do but complete the destruction of the session. | |
3469 | */ | |
3470 | if (ret != LTTNG_OK && | |
3471 | ret != -LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) { | |
7fdbed1c | 3472 | ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s", |
407d6c7b | 3473 | session->name, lttng_strerror(ret)); |
3285a971 | 3474 | destruction_last_error = -ret; |
7fdbed1c JG |
3475 | } |
3476 | } | |
5c408ad8 | 3477 | |
a503e1ef JG |
3478 | if (session->shm_path[0]) { |
3479 | /* | |
3480 | * When a session is created with an explicit shm_path, | |
3481 | * the consumer daemon will create its shared memory files | |
3482 | * at that location and will *not* unlink them. This is normal | |
3483 | * as the intention of that feature is to make it possible | |
3484 | * to retrieve the content of those files should a crash occur. | |
3485 | * | |
3486 | * To ensure the content of those files can be used, the | |
3487 | * sessiond daemon will replicate the content of the metadata | |
3488 | * cache in a metadata file. | |
3489 | * | |
3490 | * On clean-up, it is expected that the consumer daemon will | |
3491 | * unlink the shared memory files and that the session daemon | |
3492 | * will unlink the metadata file. Then, the session's directory | |
3493 | * in the shm path can be removed. | |
3494 | * | |
3495 | * Unfortunately, a flaw in the design of the sessiond's and | |
3496 | * consumerd's tear down of channels makes it impossible to | |
3497 | * determine when the sessiond _and_ the consumerd have both | |
3498 | * destroyed their representation of a channel. For one, the | |
3499 | * unlinking, close, and rmdir happen in deferred 'call_rcu' | |
3500 | * callbacks in both daemons. | |
3501 | * | |
3502 | * However, it is also impossible for the sessiond to know when | |
3503 | * the consumer daemon is done destroying its channel(s) since | |
3504 | * it occurs as a reaction to the closing of the channel's file | |
3505 | * descriptor. There is no resulting communication initiated | |
3506 | * from the consumerd to the sessiond to confirm that the | |
3507 | * operation is completed (and was successful). | |
3508 | * | |
3509 | * Until this is all fixed, the session daemon checks for the | |
3510 | * removal of the session's shm path which makes it possible | |
3511 | * to safely advertise a session as having been destroyed. | |
3512 | * | |
3513 | * Prior to this fix, it was not possible to reliably save | |
3514 | * a session making use of the --shm-path option, destroy it, | |
3515 | * and load it again. This is because the creation of the | |
3516 | * session would fail upon seeing the session's shm path | |
3517 | * already in existence. | |
3518 | * | |
3519 | * Note that none of the error paths in the check for the | |
3520 | * directory's existence return an error. This is normal | |
3521 | * as there isn't much that can be done. The session will | |
3522 | * be destroyed properly, except that we can't offer the | |
3523 | * guarantee that the same session can be re-created. | |
3524 | */ | |
3525 | current_completion_handler = &destroy_completion_handler.handler; | |
3526 | ret = lttng_strncpy(destroy_completion_handler.shm_path, | |
3527 | session->shm_path, | |
3528 | sizeof(destroy_completion_handler.shm_path)); | |
3529 | assert(!ret); | |
3530 | } | |
e32d7f27 JG |
3531 | |
3532 | /* | |
3533 | * The session is destroyed. However, note that the command context | |
3534 | * still holds a reference to the session, thus delaying its destruction | |
3535 | * _at least_ up to the point when that reference is released. | |
3536 | */ | |
3537 | session_destroy(session); | |
3e3665b8 | 3538 | if (reply_context) { |
3285a971 | 3539 | reply_context->destruction_status = destruction_last_error; |
3e3665b8 JG |
3540 | ret = session_add_destroy_notifier(session, |
3541 | cmd_destroy_session_reply, | |
3542 | (void *) reply_context); | |
3543 | if (ret) { | |
3544 | ret = LTTNG_ERR_FATAL; | |
3545 | goto end; | |
3546 | } else { | |
3547 | *sock_fd = -1; | |
3548 | } | |
3549 | } | |
3550 | ret = LTTNG_OK; | |
3551 | end: | |
2f77fc4b DG |
3552 | return ret; |
3553 | } | |
3554 | ||
2f77fc4b DG |
3555 | /* |
3556 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3557 | */ | |
56a37563 JG |
3558 | int cmd_register_consumer(struct ltt_session *session, |
3559 | enum lttng_domain_type domain, const char *sock_path, | |
3560 | struct consumer_data *cdata) | |
2f77fc4b DG |
3561 | { |
3562 | int ret, sock; | |
dd81b457 | 3563 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
3564 | |
3565 | assert(session); | |
3566 | assert(cdata); | |
3567 | assert(sock_path); | |
3568 | ||
3569 | switch (domain) { | |
3570 | case LTTNG_DOMAIN_KERNEL: | |
3571 | { | |
3572 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3573 | ||
3574 | assert(ksess); | |
3575 | ||
3576 | /* Can't register a consumer if there is already one */ | |
3577 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 3578 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
3579 | goto error; |
3580 | } | |
3581 | ||
3582 | sock = lttcomm_connect_unix_sock(sock_path); | |
3583 | if (sock < 0) { | |
f73fabfd | 3584 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
3585 | goto error; |
3586 | } | |
4ce514c4 | 3587 | cdata->cmd_sock = sock; |
2f77fc4b | 3588 | |
4ce514c4 | 3589 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 3590 | if (socket == NULL) { |
f66c074c DG |
3591 | ret = close(sock); |
3592 | if (ret < 0) { | |
3593 | PERROR("close register consumer"); | |
3594 | } | |
4ce514c4 | 3595 | cdata->cmd_sock = -1; |
f73fabfd | 3596 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3597 | goto error; |
3598 | } | |
3599 | ||
3600 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
3601 | if (socket->lock == NULL) { | |
3602 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 3603 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3604 | goto error; |
3605 | } | |
3606 | pthread_mutex_init(socket->lock, NULL); | |
3607 | socket->registered = 1; | |
3608 | ||
3609 | rcu_read_lock(); | |
3610 | consumer_add_socket(socket, ksess->consumer); | |
3611 | rcu_read_unlock(); | |
3612 | ||
3613 | pthread_mutex_lock(&cdata->pid_mutex); | |
3614 | cdata->pid = -1; | |
3615 | pthread_mutex_unlock(&cdata->pid_mutex); | |
3616 | ||
3617 | break; | |
3618 | } | |
3619 | default: | |
3620 | /* TODO: Userspace tracing */ | |
f73fabfd | 3621 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3622 | goto error; |
3623 | } | |
3624 | ||
dd81b457 | 3625 | return LTTNG_OK; |
2f77fc4b DG |
3626 | |
3627 | error: | |
dd81b457 DG |
3628 | if (socket) { |
3629 | consumer_destroy_socket(socket); | |
3630 | } | |
2f77fc4b DG |
3631 | return ret; |
3632 | } | |
3633 | ||
3634 | /* | |
3635 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3636 | */ | |
3637 | ssize_t cmd_list_domains(struct ltt_session *session, | |
3638 | struct lttng_domain **domains) | |
3639 | { | |
3640 | int ret, index = 0; | |
3641 | ssize_t nb_dom = 0; | |
fefd409b DG |
3642 | struct agent *agt; |
3643 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
3644 | |
3645 | if (session->kernel_session != NULL) { | |
3646 | DBG3("Listing domains found kernel domain"); | |
3647 | nb_dom++; | |
3648 | } | |
3649 | ||
3650 | if (session->ust_session != NULL) { | |
3651 | DBG3("Listing domains found UST global domain"); | |
3652 | nb_dom++; | |
3c6a091f | 3653 | |
e0a74f01 | 3654 | rcu_read_lock(); |
fefd409b DG |
3655 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3656 | agt, node.node) { | |
3657 | if (agt->being_used) { | |
3658 | nb_dom++; | |
3659 | } | |
3c6a091f | 3660 | } |
e0a74f01 | 3661 | rcu_read_unlock(); |
2f77fc4b DG |
3662 | } |
3663 | ||
fa64dfb4 JG |
3664 | if (!nb_dom) { |
3665 | goto end; | |
3666 | } | |
3667 | ||
2f77fc4b DG |
3668 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
3669 | if (*domains == NULL) { | |
f73fabfd | 3670 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3671 | goto error; |
3672 | } | |
3673 | ||
3674 | if (session->kernel_session != NULL) { | |
3675 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
b5edb9e8 PP |
3676 | |
3677 | /* Kernel session buffer type is always GLOBAL */ | |
3678 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
3679 | ||
2f77fc4b DG |
3680 | index++; |
3681 | } | |
3682 | ||
3683 | if (session->ust_session != NULL) { | |
3684 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 3685 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 3686 | index++; |
3c6a091f | 3687 | |
e0a74f01 | 3688 | rcu_read_lock(); |
fefd409b DG |
3689 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3690 | agt, node.node) { | |
3691 | if (agt->being_used) { | |
3692 | (*domains)[index].type = agt->domain; | |
3693 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
3694 | index++; | |
3695 | } | |
3c6a091f | 3696 | } |
e0a74f01 | 3697 | rcu_read_unlock(); |
2f77fc4b | 3698 | } |
fa64dfb4 | 3699 | end: |
2f77fc4b DG |
3700 | return nb_dom; |
3701 | ||
3702 | error: | |
f73fabfd DG |
3703 | /* Return negative value to differentiate return code */ |
3704 | return -ret; | |
2f77fc4b DG |
3705 | } |
3706 | ||
3707 | ||
3708 | /* | |
3709 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3710 | */ | |
33b9609d JR |
3711 | enum lttng_error_code cmd_list_channels(enum lttng_domain_type domain, |
3712 | struct ltt_session *session, | |
3713 | struct lttng_dynamic_buffer *buffer, | |
3714 | uint32_t *nb_channel) | |
2f77fc4b | 3715 | { |
33b9609d JR |
3716 | int ret = 0; |
3717 | uint32_t i = 0; | |
3718 | ||
3719 | assert(session); | |
3720 | assert(buffer); | |
3721 | assert(nb_channel); | |
3722 | ||
3723 | DBG("Listing channels for session %s", session->name); | |
2f77fc4b DG |
3724 | |
3725 | switch (domain) { | |
3726 | case LTTNG_DOMAIN_KERNEL: | |
33b9609d JR |
3727 | { |
3728 | /* Kernel channels */ | |
3729 | struct ltt_kernel_channel *kchan; | |
2f77fc4b | 3730 | if (session->kernel_session != NULL) { |
33b9609d JR |
3731 | cds_list_for_each_entry(kchan, |
3732 | &session->kernel_session->channel_list.head, list) { | |
3733 | uint64_t discarded_events, lost_packets; | |
3734 | struct lttng_channel_extended *extended; | |
3735 | ||
3736 | extended = (struct lttng_channel_extended *) | |
3737 | kchan->channel->attr.extended.ptr; | |
3738 | ||
3739 | ret = get_kernel_runtime_stats(session, kchan, | |
3740 | &discarded_events, &lost_packets); | |
3741 | if (ret < 0) { | |
3742 | goto end; | |
3743 | } | |
3744 | ||
3745 | /* | |
3746 | * Update the discarded_events and lost_packets | |
3747 | * count for the channel | |
3748 | */ | |
3749 | extended->discarded_events = discarded_events; | |
3750 | extended->lost_packets = lost_packets; | |
3751 | ||
3752 | ret = lttng_channel_serialize( | |
3753 | kchan->channel, buffer); | |
3754 | if (ret) { | |
3755 | ret = -1; | |
3756 | goto end; | |
3757 | } | |
3758 | ||
3759 | i++; | |
3760 | } | |
c7d620a2 | 3761 | } |
2f77fc4b | 3762 | break; |
2f77fc4b | 3763 | } |
33b9609d JR |
3764 | case LTTNG_DOMAIN_UST: |
3765 | { | |
3766 | struct lttng_ht_iter iter; | |
3767 | struct ltt_ust_channel *uchan; | |
2f77fc4b | 3768 | |
33b9609d JR |
3769 | rcu_read_lock(); |
3770 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
3771 | &iter.iter, uchan, node.node) { | |
3772 | uint64_t discarded_events = 0, lost_packets = 0; | |
3773 | struct lttng_channel *channel = NULL; | |
3774 | struct lttng_channel_extended *extended; | |
53e367f9 | 3775 | |
33b9609d JR |
3776 | channel = trace_ust_channel_to_lttng_channel(uchan); |
3777 | if (!channel) { | |
3778 | ret = -1; | |
3779 | break; | |
3780 | } | |
2f77fc4b | 3781 | |
33b9609d JR |
3782 | extended = (struct lttng_channel_extended *) |
3783 | channel->attr.extended.ptr; | |
3784 | ||
3785 | ret = get_ust_runtime_stats(session, uchan, | |
3786 | &discarded_events, &lost_packets); | |
3787 | if (ret < 0) { | |
3788 | lttng_channel_destroy(channel); | |
3789 | break; | |
3790 | } | |
3791 | ||
3792 | extended->discarded_events = discarded_events; | |
3793 | extended->lost_packets = lost_packets; | |
3794 | ||
3795 | ret = lttng_channel_serialize(channel, buffer); | |
3796 | if (ret) { | |
3797 | ret = -1; | |
3798 | break; | |
3799 | } | |
3800 | ||
3801 | i++; | |
d449df4a | 3802 | } |
33b9609d JR |
3803 | rcu_read_unlock(); |
3804 | break; | |
3805 | } | |
3806 | default: | |
3807 | break; | |
2f77fc4b DG |
3808 | } |
3809 | ||
53e367f9 | 3810 | end: |
33b9609d JR |
3811 | if (ret < 0) { |
3812 | *nb_channel = 0; | |
3813 | return LTTNG_ERR_FATAL; | |
3814 | } else { | |
3815 | *nb_channel = i; | |
3816 | return LTTNG_OK; | |
3817 | } | |
2f77fc4b DG |
3818 | } |
3819 | ||
3820 | /* | |
3821 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3822 | */ | |
166fc586 JR |
3823 | enum lttng_error_code cmd_list_events(enum lttng_domain_type domain, |
3824 | struct ltt_session *session, | |
3825 | char *channel_name, | |
3826 | struct lttng_dynamic_buffer *payload, | |
3827 | unsigned int *nb_events) | |
2f77fc4b | 3828 | { |
166fc586 JR |
3829 | enum lttng_error_code ret_code = LTTNG_OK; |
3830 | ||
3831 | assert(nb_events); | |
2f77fc4b DG |
3832 | |
3833 | switch (domain) { | |
3834 | case LTTNG_DOMAIN_KERNEL: | |
3835 | if (session->kernel_session != NULL) { | |
166fc586 JR |
3836 | ret_code = list_lttng_kernel_events(channel_name, |
3837 | session->kernel_session, payload, nb_events); | |
2f77fc4b DG |
3838 | } |
3839 | break; | |
3840 | case LTTNG_DOMAIN_UST: | |
3841 | { | |
3842 | if (session->ust_session != NULL) { | |
166fc586 JR |
3843 | ret_code = list_lttng_ust_global_events(channel_name, |
3844 | &session->ust_session->domain_global, | |
3845 | payload, nb_events); | |
2f77fc4b DG |
3846 | } |
3847 | break; | |
3848 | } | |
5cdb6027 | 3849 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3850 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3851 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3852 | if (session->ust_session) { |
fefd409b DG |
3853 | struct lttng_ht_iter iter; |
3854 | struct agent *agt; | |
3855 | ||
b11feea5 | 3856 | rcu_read_lock(); |
fefd409b DG |
3857 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
3858 | &iter.iter, agt, node.node) { | |
1dfd9906 | 3859 | if (agt->domain == domain) { |
166fc586 JR |
3860 | ret_code = list_lttng_agent_events( |
3861 | agt, payload, nb_events); | |
1dfd9906 JG |
3862 | break; |
3863 | } | |
fefd409b | 3864 | } |
b11feea5 | 3865 | rcu_read_unlock(); |
3c6a091f DG |
3866 | } |
3867 | break; | |
2f77fc4b | 3868 | default: |
166fc586 JR |
3869 | ret_code = LTTNG_ERR_UND; |
3870 | break; | |
2f77fc4b DG |
3871 | } |
3872 | ||
166fc586 | 3873 | return ret_code; |
2f77fc4b DG |
3874 | } |
3875 | ||
3876 | /* | |
3877 | * Using the session list, filled a lttng_session array to send back to the | |
3878 | * client for session listing. | |
3879 | * | |
3880 | * The session list lock MUST be acquired before calling this function. Use | |
3881 | * session_lock_list() and session_unlock_list(). | |
3882 | */ | |
b178f53e JG |
3883 | void cmd_list_lttng_sessions(struct lttng_session *sessions, |
3884 | size_t session_count, uid_t uid, gid_t gid) | |
2f77fc4b DG |
3885 | { |
3886 | int ret; | |
3887 | unsigned int i = 0; | |
3888 | struct ltt_session *session; | |
3889 | struct ltt_session_list *list = session_get_list(); | |
b178f53e JG |
3890 | struct lttng_session_extended *extended = |
3891 | (typeof(extended)) (&sessions[session_count]); | |
2f77fc4b DG |
3892 | |
3893 | DBG("Getting all available session for UID %d GID %d", | |
3894 | uid, gid); | |
3895 | /* | |
3896 | * Iterate over session list and append data after the control struct in | |
3897 | * the buffer. | |
3898 | */ | |
3899 | cds_list_for_each_entry(session, &list->head, list) { | |
e32d7f27 JG |
3900 | if (!session_get(session)) { |
3901 | continue; | |
3902 | } | |
2f77fc4b DG |
3903 | /* |
3904 | * Only list the sessions the user can control. | |
3905 | */ | |
e32d7f27 JG |
3906 | if (!session_access_ok(session, uid, gid) || |
3907 | session->destroyed) { | |
3908 | session_put(session); | |
2f77fc4b DG |
3909 | continue; |
3910 | } | |
3911 | ||
3912 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3913 | struct ltt_ust_session *usess = session->ust_session; | |
3914 | ||
3915 | if (session->consumer->type == CONSUMER_DST_NET || | |
3916 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
3917 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3918 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 3919 | sizeof(sessions[i].path), session); |
2f77fc4b | 3920 | } else { |
dec56f6c | 3921 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
366a9222 | 3922 | session->consumer->dst.session_root_path); |
2f77fc4b DG |
3923 | } |
3924 | if (ret < 0) { | |
3925 | PERROR("snprintf session path"); | |
e32d7f27 | 3926 | session_put(session); |
2f77fc4b DG |
3927 | continue; |
3928 | } | |
3929 | ||
3930 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
3931 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 3932 | sessions[i].enabled = session->active; |
2cbf8fed | 3933 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 3934 | sessions[i].live_timer_interval = session->live_timer; |
b178f53e JG |
3935 | extended[i].creation_time.value = (uint64_t) session->creation_time; |
3936 | extended[i].creation_time.is_set = 1; | |
2f77fc4b | 3937 | i++; |
e32d7f27 | 3938 | session_put(session); |
2f77fc4b DG |
3939 | } |
3940 | } | |
3941 | ||
806e2684 | 3942 | /* |
6d805429 | 3943 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 3944 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 3945 | */ |
6d805429 | 3946 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
3947 | { |
3948 | int ret; | |
3949 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3950 | struct ltt_ust_session *usess = session->ust_session; | |
3951 | ||
3952 | assert(session); | |
3953 | ||
5c408ad8 JD |
3954 | DBG("Data pending for session %s", session->name); |
3955 | ||
806e2684 | 3956 | /* Session MUST be stopped to ask for data availability. */ |
8382cf6f | 3957 | if (session->active) { |
806e2684 DG |
3958 | ret = LTTNG_ERR_SESSION_STARTED; |
3959 | goto error; | |
3a89d11a DG |
3960 | } else { |
3961 | /* | |
3962 | * If stopped, just make sure we've started before else the above call | |
3963 | * will always send that there is data pending. | |
3964 | * | |
3965 | * The consumer assumes that when the data pending command is received, | |
3966 | * the trace has been started before or else no output data is written | |
3967 | * by the streams which is a condition for data pending. So, this is | |
3968 | * *VERY* important that we don't ask the consumer before a start | |
3969 | * trace. | |
3970 | */ | |
8382cf6f | 3971 | if (!session->has_been_started) { |
3a89d11a DG |
3972 | ret = 0; |
3973 | goto error; | |
3974 | } | |
806e2684 DG |
3975 | } |
3976 | ||
92816cc3 JG |
3977 | /* A rotation is still pending, we have to wait. */ |
3978 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { | |
5c408ad8 JD |
3979 | DBG("Rotate still pending for session %s", session->name); |
3980 | ret = 1; | |
3981 | goto error; | |
3982 | } | |
3983 | ||
806e2684 | 3984 | if (ksess && ksess->consumer) { |
6d805429 DG |
3985 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
3986 | if (ret == 1) { | |
806e2684 DG |
3987 | /* Data is still being extracted for the kernel. */ |
3988 | goto error; | |
3989 | } | |
3990 | } | |
3991 | ||
3992 | if (usess && usess->consumer) { | |
6d805429 DG |
3993 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
3994 | if (ret == 1) { | |
806e2684 DG |
3995 | /* Data is still being extracted for the kernel. */ |
3996 | goto error; | |
3997 | } | |
3998 | } | |
3999 | ||
4000 | /* Data is ready to be read by a viewer */ | |
6d805429 | 4001 | ret = 0; |
806e2684 DG |
4002 | |
4003 | error: | |
4004 | return ret; | |
4005 | } | |
4006 | ||
6dc3064a DG |
4007 | /* |
4008 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
4009 | * | |
4010 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4011 | */ | |
4012 | int cmd_snapshot_add_output(struct ltt_session *session, | |
df4f5a87 | 4013 | const struct lttng_snapshot_output *output, uint32_t *id) |
6dc3064a DG |
4014 | { |
4015 | int ret; | |
4016 | struct snapshot_output *new_output; | |
4017 | ||
4018 | assert(session); | |
4019 | assert(output); | |
4020 | ||
4021 | DBG("Cmd snapshot add output for session %s", session->name); | |
4022 | ||
4023 | /* | |
903ef685 | 4024 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
4025 | */ |
4026 | if (session->output_traces) { | |
903ef685 | 4027 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4028 | goto error; |
4029 | } | |
4030 | ||
54213acc JG |
4031 | if (session->has_non_mmap_channel) { |
4032 | ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED; | |
4033 | goto error; | |
4034 | } | |
4035 | ||
6dc3064a DG |
4036 | /* Only one output is allowed until we have the "tee" feature. */ |
4037 | if (session->snapshot.nb_output == 1) { | |
4038 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
4039 | goto error; | |
4040 | } | |
4041 | ||
4042 | new_output = snapshot_output_alloc(); | |
4043 | if (!new_output) { | |
4044 | ret = LTTNG_ERR_NOMEM; | |
4045 | goto error; | |
4046 | } | |
4047 | ||
b178f53e | 4048 | ret = snapshot_output_init(session, output->max_size, output->name, |
6dc3064a DG |
4049 | output->ctrl_url, output->data_url, session->consumer, new_output, |
4050 | &session->snapshot); | |
4051 | if (ret < 0) { | |
4052 | if (ret == -ENOMEM) { | |
4053 | ret = LTTNG_ERR_NOMEM; | |
4054 | } else { | |
4055 | ret = LTTNG_ERR_INVALID; | |
4056 | } | |
4057 | goto free_error; | |
4058 | } | |
4059 | ||
6dc3064a DG |
4060 | rcu_read_lock(); |
4061 | snapshot_add_output(&session->snapshot, new_output); | |
4062 | if (id) { | |
4063 | *id = new_output->id; | |
4064 | } | |
4065 | rcu_read_unlock(); | |
4066 | ||
4067 | return LTTNG_OK; | |
4068 | ||
4069 | free_error: | |
4070 | snapshot_output_destroy(new_output); | |
4071 | error: | |
4072 | return ret; | |
4073 | } | |
4074 | ||
4075 | /* | |
4076 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
4077 | * | |
4078 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4079 | */ | |
4080 | int cmd_snapshot_del_output(struct ltt_session *session, | |
df4f5a87 | 4081 | const struct lttng_snapshot_output *output) |
6dc3064a DG |
4082 | { |
4083 | int ret; | |
eb240553 | 4084 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
4085 | |
4086 | assert(session); | |
4087 | assert(output); | |
4088 | ||
6dc3064a DG |
4089 | rcu_read_lock(); |
4090 | ||
4091 | /* | |
d3f14b8a MD |
4092 | * Permission denied to create an output if the session is not |
4093 | * set in no output mode. | |
6dc3064a DG |
4094 | */ |
4095 | if (session->output_traces) { | |
903ef685 | 4096 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4097 | goto error; |
4098 | } | |
4099 | ||
eb240553 DG |
4100 | if (output->id) { |
4101 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
4102 | session->name); | |
4103 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
4104 | } else if (*output->name != '\0') { | |
4105 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
4106 | session->name); | |
4107 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
4108 | } | |
6dc3064a DG |
4109 | if (!sout) { |
4110 | ret = LTTNG_ERR_INVALID; | |
4111 | goto error; | |
4112 | } | |
4113 | ||
4114 | snapshot_delete_output(&session->snapshot, sout); | |
4115 | snapshot_output_destroy(sout); | |
4116 | ret = LTTNG_OK; | |
4117 | ||
4118 | error: | |
4119 | rcu_read_unlock(); | |
4120 | return ret; | |
4121 | } | |
4122 | ||
4123 | /* | |
4124 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
4125 | * | |
4126 | * If no output is available, outputs is untouched and 0 is returned. | |
4127 | * | |
4128 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
4129 | */ | |
4130 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
4131 | struct lttng_snapshot_output **outputs) | |
4132 | { | |
4133 | int ret, idx = 0; | |
b223ca94 | 4134 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
4135 | struct lttng_ht_iter iter; |
4136 | struct snapshot_output *output; | |
4137 | ||
4138 | assert(session); | |
4139 | assert(outputs); | |
4140 | ||
4141 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
4142 | ||
4143 | /* | |
d3f14b8a MD |
4144 | * Permission denied to create an output if the session is not |
4145 | * set in no output mode. | |
6dc3064a DG |
4146 | */ |
4147 | if (session->output_traces) { | |
903ef685 JG |
4148 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
4149 | goto end; | |
6dc3064a DG |
4150 | } |
4151 | ||
4152 | if (session->snapshot.nb_output == 0) { | |
4153 | ret = 0; | |
903ef685 | 4154 | goto end; |
6dc3064a DG |
4155 | } |
4156 | ||
4157 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
4158 | if (!list) { | |
b223ca94 | 4159 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4160 | goto end; |
6dc3064a DG |
4161 | } |
4162 | ||
4163 | /* Copy list from session to the new list object. */ | |
b223ca94 | 4164 | rcu_read_lock(); |
6dc3064a DG |
4165 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
4166 | output, node.node) { | |
4167 | assert(output->consumer); | |
4168 | list[idx].id = output->id; | |
4169 | list[idx].max_size = output->max_size; | |
6ce22875 MD |
4170 | if (lttng_strncpy(list[idx].name, output->name, |
4171 | sizeof(list[idx].name))) { | |
4172 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4173 | goto error; |
6ce22875 | 4174 | } |
6dc3064a | 4175 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
6ce22875 | 4176 | if (lttng_strncpy(list[idx].ctrl_url, |
366a9222 | 4177 | output->consumer->dst.session_root_path, |
6ce22875 MD |
4178 | sizeof(list[idx].ctrl_url))) { |
4179 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4180 | goto error; |
6ce22875 | 4181 | } |
6dc3064a DG |
4182 | } else { |
4183 | /* Control URI. */ | |
4184 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
4185 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
4186 | if (ret < 0) { | |
b223ca94 | 4187 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4188 | goto error; |
6dc3064a DG |
4189 | } |
4190 | ||
4191 | /* Data URI. */ | |
4192 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
4193 | list[idx].data_url, sizeof(list[idx].data_url)); | |
4194 | if (ret < 0) { | |
b223ca94 | 4195 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4196 | goto error; |
6dc3064a DG |
4197 | } |
4198 | } | |
4199 | idx++; | |
4200 | } | |
4201 | ||
4202 | *outputs = list; | |
b223ca94 JG |
4203 | list = NULL; |
4204 | ret = session->snapshot.nb_output; | |
6dc3064a | 4205 | error: |
903ef685 | 4206 | rcu_read_unlock(); |
b223ca94 | 4207 | free(list); |
903ef685 | 4208 | end: |
b223ca94 | 4209 | return ret; |
6dc3064a DG |
4210 | } |
4211 | ||
93ec662e JD |
4212 | /* |
4213 | * Check if we can regenerate the metadata for this session. | |
4214 | * Only kernel, UST per-uid and non-live sessions are supported. | |
4215 | * | |
4216 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
4217 | */ | |
4218 | static | |
eded6438 | 4219 | int check_regenerate_metadata_support(struct ltt_session *session) |
93ec662e JD |
4220 | { |
4221 | int ret; | |
4222 | ||
4223 | assert(session); | |
4224 | ||
4225 | if (session->live_timer != 0) { | |
4226 | ret = LTTNG_ERR_LIVE_SESSION; | |
4227 | goto end; | |
4228 | } | |
4229 | if (!session->active) { | |
4230 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4231 | goto end; | |
4232 | } | |
4233 | if (session->ust_session) { | |
4234 | switch (session->ust_session->buffer_type) { | |
4235 | case LTTNG_BUFFER_PER_UID: | |
4236 | break; | |
4237 | case LTTNG_BUFFER_PER_PID: | |
4238 | ret = LTTNG_ERR_PER_PID_SESSION; | |
4239 | goto end; | |
4240 | default: | |
4241 | assert(0); | |
4242 | ret = LTTNG_ERR_UNK; | |
4243 | goto end; | |
4244 | } | |
4245 | } | |
4246 | if (session->consumer->type == CONSUMER_DST_NET && | |
4247 | session->consumer->relay_minor_version < 8) { | |
4248 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; | |
4249 | goto end; | |
4250 | } | |
4251 | ret = 0; | |
4252 | ||
4253 | end: | |
4254 | return ret; | |
4255 | } | |
4256 | ||
7802bae3 LL |
4257 | static |
4258 | int clear_metadata_file(int fd) | |
4259 | { | |
4260 | int ret; | |
a5df8828 | 4261 | off_t lseek_ret; |
7802bae3 | 4262 | |
a5df8828 GL |
4263 | lseek_ret = lseek(fd, 0, SEEK_SET); |
4264 | if (lseek_ret < 0) { | |
7802bae3 | 4265 | PERROR("lseek"); |
a5df8828 | 4266 | ret = -1; |
7802bae3 LL |
4267 | goto end; |
4268 | } | |
4269 | ||
4270 | ret = ftruncate(fd, 0); | |
4271 | if (ret < 0) { | |
4272 | PERROR("ftruncate"); | |
4273 | goto end; | |
4274 | } | |
4275 | ||
4276 | end: | |
4277 | return ret; | |
4278 | } | |
4279 | ||
93ec662e | 4280 | static |
eded6438 | 4281 | int ust_regenerate_metadata(struct ltt_ust_session *usess) |
93ec662e JD |
4282 | { |
4283 | int ret = 0; | |
4284 | struct buffer_reg_uid *uid_reg = NULL; | |
4285 | struct buffer_reg_session *session_reg = NULL; | |
4286 | ||
4287 | rcu_read_lock(); | |
4288 | cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { | |
4289 | struct ust_registry_session *registry; | |
4290 | struct ust_registry_channel *chan; | |
4291 | struct lttng_ht_iter iter_chan; | |
4292 | ||
4293 | session_reg = uid_reg->registry; | |
4294 | registry = session_reg->reg.ust; | |
4295 | ||
4296 | pthread_mutex_lock(®istry->lock); | |
4297 | registry->metadata_len_sent = 0; | |
4298 | memset(registry->metadata, 0, registry->metadata_alloc_len); | |
4299 | registry->metadata_len = 0; | |
4300 | registry->metadata_version++; | |
7802bae3 LL |
4301 | if (registry->metadata_fd > 0) { |
4302 | /* Clear the metadata file's content. */ | |
4303 | ret = clear_metadata_file(registry->metadata_fd); | |
4304 | if (ret) { | |
4305 | pthread_mutex_unlock(®istry->lock); | |
4306 | goto end; | |
4307 | } | |
4308 | } | |
4309 | ||
93ec662e JD |
4310 | ret = ust_metadata_session_statedump(registry, NULL, |
4311 | registry->major, registry->minor); | |
4312 | if (ret) { | |
4313 | pthread_mutex_unlock(®istry->lock); | |
4314 | ERR("Failed to generate session metadata (err = %d)", | |
4315 | ret); | |
4316 | goto end; | |
4317 | } | |
4318 | cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, | |
4319 | chan, node.node) { | |
4320 | struct ust_registry_event *event; | |
4321 | struct lttng_ht_iter iter_event; | |
4322 | ||
4323 | ret = ust_metadata_channel_statedump(registry, chan); | |
4324 | if (ret) { | |
4325 | pthread_mutex_unlock(®istry->lock); | |
4326 | ERR("Failed to generate channel metadata " | |
4327 | "(err = %d)", ret); | |
4328 | goto end; | |
4329 | } | |
4330 | cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, | |
4331 | event, node.node) { | |
4332 | ret = ust_metadata_event_statedump(registry, | |
4333 | chan, event); | |
4334 | if (ret) { | |
4335 | pthread_mutex_unlock(®istry->lock); | |
4336 | ERR("Failed to generate event metadata " | |
4337 | "(err = %d)", ret); | |
4338 | goto end; | |
4339 | } | |
4340 | } | |
4341 | } | |
4342 | pthread_mutex_unlock(®istry->lock); | |
4343 | } | |
4344 | ||
4345 | end: | |
4346 | rcu_read_unlock(); | |
4347 | return ret; | |
4348 | } | |
4349 | ||
4350 | /* | |
eded6438 | 4351 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
4352 | * |
4353 | * Ask the consumer to truncate the existing metadata file(s) and | |
4354 | * then regenerate the metadata. Live and per-pid sessions are not | |
4355 | * supported and return an error. | |
4356 | * | |
4357 | * Return 0 on success or else a LTTNG_ERR code. | |
4358 | */ | |
eded6438 | 4359 | int cmd_regenerate_metadata(struct ltt_session *session) |
93ec662e JD |
4360 | { |
4361 | int ret; | |
4362 | ||
4363 | assert(session); | |
4364 | ||
eded6438 | 4365 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
4366 | if (ret) { |
4367 | goto end; | |
4368 | } | |
4369 | ||
4370 | if (session->kernel_session) { | |
eded6438 | 4371 | ret = kernctl_session_regenerate_metadata( |
93ec662e JD |
4372 | session->kernel_session->fd); |
4373 | if (ret < 0) { | |
4374 | ERR("Failed to regenerate the kernel metadata"); | |
4375 | goto end; | |
4376 | } | |
4377 | } | |
4378 | ||
4379 | if (session->ust_session) { | |
eded6438 | 4380 | ret = ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
4381 | if (ret < 0) { |
4382 | ERR("Failed to regenerate the UST metadata"); | |
4383 | goto end; | |
4384 | } | |
4385 | } | |
4386 | DBG("Cmd metadata regenerate for session %s", session->name); | |
4387 | ret = LTTNG_OK; | |
4388 | ||
4389 | end: | |
4390 | return ret; | |
4391 | } | |
4392 | ||
c2561365 JD |
4393 | /* |
4394 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
4395 | * | |
4396 | * Ask the tracer to regenerate a new statedump. | |
4397 | * | |
4398 | * Return 0 on success or else a LTTNG_ERR code. | |
4399 | */ | |
4400 | int cmd_regenerate_statedump(struct ltt_session *session) | |
4401 | { | |
4402 | int ret; | |
4403 | ||
4404 | assert(session); | |
4405 | ||
4406 | if (!session->active) { | |
4407 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4408 | goto end; | |
4409 | } | |
c2561365 JD |
4410 | |
4411 | if (session->kernel_session) { | |
4412 | ret = kernctl_session_regenerate_statedump( | |
4413 | session->kernel_session->fd); | |
4414 | /* | |
4415 | * Currently, the statedump in kernel can only fail if out | |
4416 | * of memory. | |
4417 | */ | |
4418 | if (ret < 0) { | |
4419 | if (ret == -ENOMEM) { | |
4420 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
4421 | } else { | |
4422 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4423 | } | |
4424 | ERR("Failed to regenerate the kernel statedump"); | |
4425 | goto end; | |
4426 | } | |
4427 | } | |
4428 | ||
4429 | if (session->ust_session) { | |
4430 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
4431 | /* | |
4432 | * Currently, the statedump in UST always returns 0. | |
4433 | */ | |
4434 | if (ret < 0) { | |
4435 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4436 | ERR("Failed to regenerate the UST statedump"); | |
4437 | goto end; | |
4438 | } | |
4439 | } | |
4440 | DBG("Cmd regenerate statedump for session %s", session->name); | |
4441 | ret = LTTNG_OK; | |
4442 | ||
4443 | end: | |
4444 | return ret; | |
4445 | } | |
4446 | ||
b0880ae5 JG |
4447 | int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock, |
4448 | struct notification_thread_handle *notification_thread) | |
4449 | { | |
4450 | int ret; | |
4451 | size_t trigger_len; | |
4452 | ssize_t sock_recv_len; | |
4453 | struct lttng_trigger *trigger = NULL; | |
4454 | struct lttng_buffer_view view; | |
4455 | struct lttng_dynamic_buffer trigger_buffer; | |
4456 | ||
4457 | lttng_dynamic_buffer_init(&trigger_buffer); | |
4458 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; | |
4459 | ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len); | |
4460 | if (ret) { | |
4461 | ret = LTTNG_ERR_NOMEM; | |
4462 | goto end; | |
4463 | } | |
4464 | ||
4465 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data, | |
4466 | trigger_len); | |
4467 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { | |
4468 | ERR("Failed to receive \"register trigger\" command payload"); | |
4469 | /* TODO: should this be a new error enum ? */ | |
4470 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4471 | goto end; | |
4472 | } | |
4473 | ||
4474 | view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1); | |
4475 | if (lttng_trigger_create_from_buffer(&view, &trigger) != | |
4476 | trigger_len) { | |
4477 | ERR("Invalid trigger payload received in \"register trigger\" command"); | |
4478 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4479 | goto end; | |
4480 | } | |
4481 | ||
4482 | ret = notification_thread_command_register_trigger(notification_thread, | |
4483 | trigger); | |
587f9fd0 JG |
4484 | /* Ownership of trigger was transferred. */ |
4485 | trigger = NULL; | |
b0880ae5 | 4486 | end: |
587f9fd0 | 4487 | lttng_trigger_destroy(trigger); |
b0880ae5 JG |
4488 | lttng_dynamic_buffer_reset(&trigger_buffer); |
4489 | return ret; | |
4490 | } | |
4491 | ||
4492 | int cmd_unregister_trigger(struct command_ctx *cmd_ctx, int sock, | |
4493 | struct notification_thread_handle *notification_thread) | |
4494 | { | |
4495 | int ret; | |
4496 | size_t trigger_len; | |
4497 | ssize_t sock_recv_len; | |
4498 | struct lttng_trigger *trigger = NULL; | |
4499 | struct lttng_buffer_view view; | |
4500 | struct lttng_dynamic_buffer trigger_buffer; | |
4501 | ||
4502 | lttng_dynamic_buffer_init(&trigger_buffer); | |
4503 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; | |
4504 | ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len); | |
4505 | if (ret) { | |
4506 | ret = LTTNG_ERR_NOMEM; | |
4507 | goto end; | |
4508 | } | |
4509 | ||
4510 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data, | |
4511 | trigger_len); | |
4512 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { | |
4513 | ERR("Failed to receive \"unregister trigger\" command payload"); | |
4514 | /* TODO: should this be a new error enum ? */ | |
4515 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4516 | goto end; | |
4517 | } | |
4518 | ||
4519 | view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1); | |
4520 | if (lttng_trigger_create_from_buffer(&view, &trigger) != | |
4521 | trigger_len) { | |
4522 | ERR("Invalid trigger payload received in \"unregister trigger\" command"); | |
4523 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4524 | goto end; | |
4525 | } | |
4526 | ||
4527 | ret = notification_thread_command_unregister_trigger(notification_thread, | |
4528 | trigger); | |
4529 | end: | |
587f9fd0 | 4530 | lttng_trigger_destroy(trigger); |
b0880ae5 JG |
4531 | lttng_dynamic_buffer_reset(&trigger_buffer); |
4532 | return ret; | |
4533 | } | |
4534 | ||
6dc3064a DG |
4535 | /* |
4536 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
4537 | * snapshot output is *not* set with a remote destination. | |
4538 | * | |
9a654598 | 4539 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4540 | */ |
9a654598 | 4541 | static enum lttng_error_code set_relayd_for_snapshot( |
348a81dc | 4542 | struct consumer_output *output, |
fb9a95c4 | 4543 | const struct ltt_session *session) |
6dc3064a | 4544 | { |
9a654598 | 4545 | enum lttng_error_code status = LTTNG_OK; |
6dc3064a DG |
4546 | struct lttng_ht_iter iter; |
4547 | struct consumer_socket *socket; | |
1e791a74 | 4548 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
6fa5fe7c | 4549 | const char *base_path; |
6dc3064a | 4550 | |
348a81dc | 4551 | assert(output); |
6dc3064a DG |
4552 | assert(session); |
4553 | ||
4554 | DBG2("Set relayd object from snapshot output"); | |
4555 | ||
1e791a74 | 4556 | if (session->current_trace_chunk) { |
348a81dc JG |
4557 | enum lttng_trace_chunk_status chunk_status = |
4558 | lttng_trace_chunk_get_id( | |
4559 | session->current_trace_chunk, | |
4560 | ¤t_chunk_id.value); | |
1e791a74 | 4561 | |
348a81dc | 4562 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) { |
1e791a74 JG |
4563 | current_chunk_id.is_set = true; |
4564 | } else { | |
4565 | ERR("Failed to get current trace chunk id"); | |
4566 | status = LTTNG_ERR_UNK; | |
4567 | goto error; | |
4568 | } | |
4569 | } | |
4570 | ||
6dc3064a | 4571 | /* Ignore if snapshot consumer output is not network. */ |
348a81dc | 4572 | if (output->type != CONSUMER_DST_NET) { |
6dc3064a DG |
4573 | goto error; |
4574 | } | |
4575 | ||
6fa5fe7c MD |
4576 | /* |
4577 | * The snapshot record URI base path overrides the session | |
4578 | * base path. | |
4579 | */ | |
4580 | if (output->dst.net.control.subdir[0] != '\0') { | |
4581 | base_path = output->dst.net.control.subdir; | |
4582 | } else { | |
4583 | base_path = session->base_path; | |
4584 | } | |
4585 | ||
6dc3064a DG |
4586 | /* |
4587 | * For each consumer socket, create and send the relayd object of the | |
4588 | * snapshot output. | |
4589 | */ | |
4590 | rcu_read_lock(); | |
348a81dc | 4591 | cds_lfht_for_each_entry(output->socks->ht, &iter.iter, |
5eecee74 | 4592 | socket, node.node) { |
ecd0f96d | 4593 | pthread_mutex_lock(socket->lock); |
9a654598 | 4594 | status = send_consumer_relayd_sockets(0, session->id, |
348a81dc | 4595 | output, socket, |
d3e2ba59 | 4596 | session->name, session->hostname, |
6fa5fe7c | 4597 | base_path, |
1e791a74 | 4598 | session->live_timer, |
db1da059 | 4599 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
4600 | session->creation_time, |
4601 | session->name_contains_creation_time); | |
ecd0f96d | 4602 | pthread_mutex_unlock(socket->lock); |
9a654598 | 4603 | if (status != LTTNG_OK) { |
6dc3064a DG |
4604 | rcu_read_unlock(); |
4605 | goto error; | |
4606 | } | |
4607 | } | |
4608 | rcu_read_unlock(); | |
4609 | ||
4610 | error: | |
9a654598 | 4611 | return status; |
6dc3064a DG |
4612 | } |
4613 | ||
4614 | /* | |
4615 | * Record a kernel snapshot. | |
4616 | * | |
fac41e72 | 4617 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4618 | */ |
fb9a95c4 JG |
4619 | static enum lttng_error_code record_kernel_snapshot( |
4620 | struct ltt_kernel_session *ksess, | |
348a81dc | 4621 | const struct consumer_output *output, |
fb9a95c4 | 4622 | const struct ltt_session *session, |
d07ceecd | 4623 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a | 4624 | { |
9a654598 | 4625 | enum lttng_error_code status; |
6dc3064a DG |
4626 | |
4627 | assert(ksess); | |
4628 | assert(output); | |
4629 | assert(session); | |
4630 | ||
348a81dc JG |
4631 | status = kernel_snapshot_record( |
4632 | ksess, output, wait, nb_packets_per_stream); | |
9a654598 | 4633 | return status; |
6dc3064a DG |
4634 | } |
4635 | ||
4636 | /* | |
4637 | * Record a UST snapshot. | |
4638 | * | |
9a654598 | 4639 | * Returns LTTNG_OK on success or a LTTNG_ERR error code. |
6dc3064a | 4640 | */ |
9a654598 | 4641 | static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess, |
348a81dc JG |
4642 | const struct consumer_output *output, |
4643 | const struct ltt_session *session, | |
4644 | int wait, uint64_t nb_packets_per_stream) | |
6dc3064a | 4645 | { |
9a654598 | 4646 | enum lttng_error_code status; |
6dc3064a DG |
4647 | |
4648 | assert(usess); | |
4649 | assert(output); | |
4650 | assert(session); | |
4651 | ||
348a81dc JG |
4652 | status = ust_app_snapshot_record( |
4653 | usess, output, wait, nb_packets_per_stream); | |
9a654598 | 4654 | return status; |
6dc3064a DG |
4655 | } |
4656 | ||
d07ceecd | 4657 | static |
fb9a95c4 JG |
4658 | uint64_t get_session_size_one_more_packet_per_stream( |
4659 | const struct ltt_session *session, uint64_t cur_nr_packets) | |
68808f4e | 4660 | { |
d07ceecd | 4661 | uint64_t tot_size = 0; |
68808f4e DG |
4662 | |
4663 | if (session->kernel_session) { | |
4664 | struct ltt_kernel_channel *chan; | |
fb9a95c4 JG |
4665 | const struct ltt_kernel_session *ksess = |
4666 | session->kernel_session; | |
68808f4e | 4667 | |
68808f4e | 4668 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
4669 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
4670 | /* | |
4671 | * Don't take channel into account if we | |
4672 | * already grab all its packets. | |
4673 | */ | |
4674 | continue; | |
68808f4e | 4675 | } |
d07ceecd MD |
4676 | tot_size += chan->channel->attr.subbuf_size |
4677 | * chan->stream_count; | |
68808f4e DG |
4678 | } |
4679 | } | |
4680 | ||
4681 | if (session->ust_session) { | |
fb9a95c4 | 4682 | const struct ltt_ust_session *usess = session->ust_session; |
68808f4e | 4683 | |
d07ceecd MD |
4684 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
4685 | cur_nr_packets); | |
68808f4e DG |
4686 | } |
4687 | ||
d07ceecd | 4688 | return tot_size; |
68808f4e DG |
4689 | } |
4690 | ||
5c786ded | 4691 | /* |
d07ceecd MD |
4692 | * Calculate the number of packets we can grab from each stream that |
4693 | * fits within the overall snapshot max size. | |
4694 | * | |
4695 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
4696 | * the number of packets per stream. | |
4697 | * | |
4698 | * TODO: this approach is not perfect: we consider the worse case | |
4699 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
4700 | * better if we do this calculation while we actually grab the packet | |
4701 | * content: we would know how much padding we don't actually store into | |
4702 | * the file. | |
4703 | * | |
4704 | * This algorithm is currently bounded by the number of packets per | |
4705 | * stream. | |
4706 | * | |
4707 | * Since we call this algorithm before actually grabbing the data, it's | |
4708 | * an approximation: for instance, applications could appear/disappear | |
4709 | * in between this call and actually grabbing data. | |
5c786ded | 4710 | */ |
d07ceecd | 4711 | static |
fb9a95c4 JG |
4712 | int64_t get_session_nb_packets_per_stream(const struct ltt_session *session, |
4713 | uint64_t max_size) | |
5c786ded | 4714 | { |
d07ceecd MD |
4715 | int64_t size_left; |
4716 | uint64_t cur_nb_packets = 0; | |
5c786ded | 4717 | |
d07ceecd MD |
4718 | if (!max_size) { |
4719 | return 0; /* Infinite */ | |
5c786ded JD |
4720 | } |
4721 | ||
d07ceecd MD |
4722 | size_left = max_size; |
4723 | for (;;) { | |
4724 | uint64_t one_more_packet_tot_size; | |
5c786ded | 4725 | |
fb9a95c4 JG |
4726 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream( |
4727 | session, cur_nb_packets); | |
d07ceecd MD |
4728 | if (!one_more_packet_tot_size) { |
4729 | /* We are already grabbing all packets. */ | |
4730 | break; | |
4731 | } | |
4732 | size_left -= one_more_packet_tot_size; | |
4733 | if (size_left < 0) { | |
4734 | break; | |
4735 | } | |
4736 | cur_nb_packets++; | |
5c786ded | 4737 | } |
aecf2da5 | 4738 | if (!cur_nb_packets && size_left != max_size) { |
d07ceecd MD |
4739 | /* Not enough room to grab one packet of each stream, error. */ |
4740 | return -1; | |
4741 | } | |
4742 | return cur_nb_packets; | |
5c786ded JD |
4743 | } |
4744 | ||
fb9a95c4 | 4745 | static |
d2956687 | 4746 | enum lttng_error_code snapshot_record(struct ltt_session *session, |
fb9a95c4 JG |
4747 | const struct snapshot_output *snapshot_output, int wait) |
4748 | { | |
4749 | int64_t nb_packets_per_stream; | |
d2956687 | 4750 | char snapshot_chunk_name[LTTNG_NAME_MAX]; |
348a81dc JG |
4751 | int ret; |
4752 | enum lttng_error_code ret_code = LTTNG_OK; | |
d2956687 | 4753 | struct lttng_trace_chunk *snapshot_trace_chunk; |
348a81dc JG |
4754 | struct consumer_output *original_ust_consumer_output = NULL; |
4755 | struct consumer_output *original_kernel_consumer_output = NULL; | |
4756 | struct consumer_output *snapshot_ust_consumer_output = NULL; | |
4757 | struct consumer_output *snapshot_kernel_consumer_output = NULL; | |
d2956687 | 4758 | |
348a81dc | 4759 | ret = snprintf(snapshot_chunk_name, sizeof(snapshot_chunk_name), |
d2956687 JG |
4760 | "%s-%s-%" PRIu64, |
4761 | snapshot_output->name, | |
4762 | snapshot_output->datetime, | |
4763 | snapshot_output->nb_snapshot); | |
348a81dc | 4764 | if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) { |
d2956687 | 4765 | ERR("Failed to format snapshot name"); |
348a81dc JG |
4766 | ret_code = LTTNG_ERR_INVALID; |
4767 | goto error; | |
d2956687 JG |
4768 | } |
4769 | DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"", | |
4770 | snapshot_output->name, session->name, | |
4771 | snapshot_chunk_name); | |
348a81dc JG |
4772 | if (!session->kernel_session && !session->ust_session) { |
4773 | ERR("Failed to record snapshot as no channels exist"); | |
4774 | ret_code = LTTNG_ERR_NO_CHANNEL; | |
4775 | goto error; | |
4776 | } | |
4777 | ||
4778 | if (session->kernel_session) { | |
4779 | original_kernel_consumer_output = | |
4780 | session->kernel_session->consumer; | |
4781 | snapshot_kernel_consumer_output = | |
4782 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4783 | strcpy(snapshot_kernel_consumer_output->chunk_path, |
4784 | snapshot_chunk_name); | |
06da8843 JR |
4785 | |
4786 | /* Copy the original domain subdir. */ | |
4787 | strcpy(snapshot_kernel_consumer_output->domain_subdir, | |
4788 | original_kernel_consumer_output->domain_subdir); | |
4789 | ||
348a81dc JG |
4790 | ret = consumer_copy_sockets(snapshot_kernel_consumer_output, |
4791 | original_kernel_consumer_output); | |
4792 | if (ret < 0) { | |
4793 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4794 | ret_code = LTTNG_ERR_NOMEM; | |
4795 | goto error; | |
4796 | } | |
4797 | ret_code = set_relayd_for_snapshot( | |
4798 | snapshot_kernel_consumer_output, session); | |
4799 | if (ret_code != LTTNG_OK) { | |
4800 | ERR("Failed to setup relay daemon for kernel tracer snapshot"); | |
4801 | goto error; | |
4802 | } | |
4803 | session->kernel_session->consumer = | |
4804 | snapshot_kernel_consumer_output; | |
4805 | } | |
4806 | if (session->ust_session) { | |
4807 | original_ust_consumer_output = session->ust_session->consumer; | |
4808 | snapshot_ust_consumer_output = | |
4809 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4810 | strcpy(snapshot_ust_consumer_output->chunk_path, |
4811 | snapshot_chunk_name); | |
06da8843 JR |
4812 | |
4813 | /* Copy the original domain subdir. */ | |
4814 | strcpy(snapshot_ust_consumer_output->domain_subdir, | |
4815 | original_ust_consumer_output->domain_subdir); | |
4816 | ||
348a81dc JG |
4817 | ret = consumer_copy_sockets(snapshot_ust_consumer_output, |
4818 | original_ust_consumer_output); | |
4819 | if (ret < 0) { | |
4820 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4821 | ret_code = LTTNG_ERR_NOMEM; | |
4822 | goto error; | |
4823 | } | |
4824 | ret_code = set_relayd_for_snapshot( | |
4825 | snapshot_ust_consumer_output, session); | |
4826 | if (ret_code != LTTNG_OK) { | |
4827 | ERR("Failed to setup relay daemon for userspace tracer snapshot"); | |
4828 | goto error; | |
4829 | } | |
4830 | session->ust_session->consumer = | |
4831 | snapshot_ust_consumer_output; | |
4832 | } | |
4833 | ||
d2956687 | 4834 | snapshot_trace_chunk = session_create_new_trace_chunk(session, |
348a81dc JG |
4835 | snapshot_kernel_consumer_output ?: |
4836 | snapshot_ust_consumer_output, | |
4837 | consumer_output_get_base_path( | |
4838 | snapshot_output->consumer), | |
d2956687 JG |
4839 | snapshot_chunk_name); |
4840 | if (!snapshot_trace_chunk) { | |
348a81dc JG |
4841 | ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"", |
4842 | session->name); | |
4843 | ret_code = LTTNG_ERR_CREATE_DIR_FAIL; | |
4844 | goto error; | |
d2956687 JG |
4845 | } |
4846 | assert(!session->current_trace_chunk); | |
4847 | ret = session_set_trace_chunk(session, snapshot_trace_chunk, NULL); | |
4848 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
4849 | snapshot_trace_chunk = NULL; | |
4850 | if (ret) { | |
348a81dc JG |
4851 | ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"", |
4852 | session->name); | |
4853 | ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
4854 | goto error; | |
d2956687 | 4855 | } |
fb9a95c4 JG |
4856 | |
4857 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
4858 | snapshot_output->max_size); | |
4859 | if (nb_packets_per_stream < 0) { | |
348a81dc | 4860 | ret_code = LTTNG_ERR_MAX_SIZE_INVALID; |
5151d412 | 4861 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4862 | } |
4863 | ||
4864 | if (session->kernel_session) { | |
348a81dc JG |
4865 | ret_code = record_kernel_snapshot(session->kernel_session, |
4866 | snapshot_kernel_consumer_output, session, | |
fb9a95c4 | 4867 | wait, nb_packets_per_stream); |
348a81dc | 4868 | if (ret_code != LTTNG_OK) { |
5151d412 | 4869 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4870 | } |
4871 | } | |
4872 | ||
4873 | if (session->ust_session) { | |
348a81dc JG |
4874 | ret_code = record_ust_snapshot(session->ust_session, |
4875 | snapshot_ust_consumer_output, session, | |
fb9a95c4 | 4876 | wait, nb_packets_per_stream); |
348a81dc | 4877 | if (ret_code != LTTNG_OK) { |
5151d412 | 4878 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4879 | } |
4880 | } | |
d2956687 | 4881 | |
5151d412 | 4882 | error_close_trace_chunk: |
dbfee52c MD |
4883 | if (session_set_trace_chunk(session, NULL, &snapshot_trace_chunk)) { |
4884 | ERR("Failed to release the current trace chunk of session \"%s\"", | |
4885 | session->name); | |
4886 | ret_code = LTTNG_ERR_UNK; | |
4887 | } | |
4888 | ||
4889 | if (session_close_trace_chunk(session, snapshot_trace_chunk, | |
343defc2 | 4890 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) { |
d2956687 JG |
4891 | /* |
4892 | * Don't goto end; make sure the chunk is closed for the session | |
4893 | * to allow future snapshots. | |
4894 | */ | |
4895 | ERR("Failed to close snapshot trace chunk of session \"%s\"", | |
4896 | session->name); | |
348a81dc | 4897 | ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; |
d2956687 | 4898 | } |
837c04d6 JG |
4899 | |
4900 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
4901 | snapshot_trace_chunk = NULL; | |
348a81dc JG |
4902 | error: |
4903 | if (original_ust_consumer_output) { | |
4904 | session->ust_session->consumer = original_ust_consumer_output; | |
4905 | } | |
4906 | if (original_kernel_consumer_output) { | |
4907 | session->kernel_session->consumer = | |
4908 | original_kernel_consumer_output; | |
4909 | } | |
4910 | consumer_output_put(snapshot_ust_consumer_output); | |
4911 | consumer_output_put(snapshot_kernel_consumer_output); | |
4912 | return ret_code; | |
fb9a95c4 JG |
4913 | } |
4914 | ||
6dc3064a DG |
4915 | /* |
4916 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
4917 | * | |
4918 | * The wait parameter is ignored so this call always wait for the snapshot to | |
4919 | * complete before returning. | |
4920 | * | |
4921 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4922 | */ | |
4923 | int cmd_snapshot_record(struct ltt_session *session, | |
df4f5a87 | 4924 | const struct lttng_snapshot_output *output, int wait) |
6dc3064a | 4925 | { |
9a654598 JG |
4926 | enum lttng_error_code cmd_ret = LTTNG_OK; |
4927 | int ret; | |
00e1dfc4 | 4928 | unsigned int snapshot_success = 0; |
10ba83fe | 4929 | char datetime[16]; |
2abe7969 | 4930 | struct snapshot_output *tmp_output = NULL; |
6dc3064a DG |
4931 | |
4932 | assert(session); | |
ba45d9f0 | 4933 | assert(output); |
6dc3064a DG |
4934 | |
4935 | DBG("Cmd snapshot record for session %s", session->name); | |
4936 | ||
10ba83fe JR |
4937 | /* Get the datetime for the snapshot output directory. */ |
4938 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
4939 | sizeof(datetime)); | |
4940 | if (!ret) { | |
9a654598 | 4941 | cmd_ret = LTTNG_ERR_INVALID; |
10ba83fe JR |
4942 | goto error; |
4943 | } | |
4944 | ||
6dc3064a | 4945 | /* |
d3f14b8a MD |
4946 | * Permission denied to create an output if the session is not |
4947 | * set in no output mode. | |
6dc3064a DG |
4948 | */ |
4949 | if (session->output_traces) { | |
9a654598 | 4950 | cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4951 | goto error; |
4952 | } | |
4953 | ||
4954 | /* The session needs to be started at least once. */ | |
8382cf6f | 4955 | if (!session->has_been_started) { |
9a654598 | 4956 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
6dc3064a DG |
4957 | goto error; |
4958 | } | |
4959 | ||
4960 | /* Use temporary output for the session. */ | |
ba45d9f0 | 4961 | if (*output->ctrl_url != '\0') { |
2abe7969 JG |
4962 | tmp_output = snapshot_output_alloc(); |
4963 | if (!tmp_output) { | |
4964 | cmd_ret = LTTNG_ERR_NOMEM; | |
4965 | goto error; | |
4966 | } | |
4967 | ||
b178f53e JG |
4968 | ret = snapshot_output_init(session, output->max_size, |
4969 | output->name, | |
4970 | output->ctrl_url, output->data_url, | |
4971 | session->consumer, | |
2abe7969 | 4972 | tmp_output, NULL); |
6dc3064a DG |
4973 | if (ret < 0) { |
4974 | if (ret == -ENOMEM) { | |
9a654598 | 4975 | cmd_ret = LTTNG_ERR_NOMEM; |
6dc3064a | 4976 | } else { |
9a654598 | 4977 | cmd_ret = LTTNG_ERR_INVALID; |
6dc3064a DG |
4978 | } |
4979 | goto error; | |
4980 | } | |
1bfe7328 | 4981 | /* Use the global session count for the temporary snapshot. */ |
2abe7969 | 4982 | tmp_output->nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe JR |
4983 | |
4984 | /* Use the global datetime */ | |
2abe7969 JG |
4985 | memcpy(tmp_output->datetime, datetime, sizeof(datetime)); |
4986 | cmd_ret = snapshot_record(session, tmp_output, wait); | |
fb9a95c4 | 4987 | if (cmd_ret != LTTNG_OK) { |
804c90a8 JR |
4988 | goto error; |
4989 | } | |
804c90a8 JR |
4990 | snapshot_success = 1; |
4991 | } else { | |
4992 | struct snapshot_output *sout; | |
4993 | struct lttng_ht_iter iter; | |
68808f4e | 4994 | |
804c90a8 JR |
4995 | rcu_read_lock(); |
4996 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
4997 | &iter.iter, sout, node.node) { | |
2abe7969 JG |
4998 | struct snapshot_output output_copy; |
4999 | ||
804c90a8 | 5000 | /* |
2abe7969 JG |
5001 | * Make a local copy of the output and override output |
5002 | * parameters with those provided as part of the | |
5003 | * command. | |
804c90a8 | 5004 | */ |
2abe7969 | 5005 | memcpy(&output_copy, sout, sizeof(output_copy)); |
1bfe7328 | 5006 | |
804c90a8 | 5007 | if (output->max_size != (uint64_t) -1ULL) { |
2abe7969 | 5008 | output_copy.max_size = output->max_size; |
6dc3064a | 5009 | } |
d07ceecd | 5010 | |
2abe7969 JG |
5011 | output_copy.nb_snapshot = session->snapshot.nb_snapshot; |
5012 | memcpy(output_copy.datetime, datetime, | |
5013 | sizeof(datetime)); | |
6dc3064a | 5014 | |
804c90a8 JR |
5015 | /* Use temporary name. */ |
5016 | if (*output->name != '\0') { | |
2abe7969 JG |
5017 | if (lttng_strncpy(output_copy.name, |
5018 | output->name, | |
5019 | sizeof(output_copy.name))) { | |
9a654598 | 5020 | cmd_ret = LTTNG_ERR_INVALID; |
cf3e357d MD |
5021 | rcu_read_unlock(); |
5022 | goto error; | |
5023 | } | |
804c90a8 | 5024 | } |
e1986656 | 5025 | |
2abe7969 | 5026 | cmd_ret = snapshot_record(session, &output_copy, wait); |
fb9a95c4 JG |
5027 | if (cmd_ret != LTTNG_OK) { |
5028 | rcu_read_unlock(); | |
5029 | goto error; | |
6dc3064a | 5030 | } |
804c90a8 | 5031 | snapshot_success = 1; |
6dc3064a | 5032 | } |
804c90a8 | 5033 | rcu_read_unlock(); |
6dc3064a DG |
5034 | } |
5035 | ||
1bfe7328 DG |
5036 | if (snapshot_success) { |
5037 | session->snapshot.nb_snapshot++; | |
b67578cb | 5038 | } else { |
9a654598 | 5039 | cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL; |
1bfe7328 DG |
5040 | } |
5041 | ||
6dc3064a | 5042 | error: |
2abe7969 JG |
5043 | if (tmp_output) { |
5044 | snapshot_output_destroy(tmp_output); | |
5045 | } | |
9a654598 | 5046 | return cmd_ret; |
6dc3064a DG |
5047 | } |
5048 | ||
d7ba1388 MD |
5049 | /* |
5050 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
5051 | */ | |
5052 | int cmd_set_session_shm_path(struct ltt_session *session, | |
5053 | const char *shm_path) | |
5054 | { | |
5055 | /* Safety net */ | |
5056 | assert(session); | |
5057 | ||
5058 | /* | |
5059 | * Can only set shm path before session is started. | |
5060 | */ | |
5061 | if (session->has_been_started) { | |
5062 | return LTTNG_ERR_SESSION_STARTED; | |
5063 | } | |
5064 | ||
5065 | strncpy(session->shm_path, shm_path, | |
5066 | sizeof(session->shm_path)); | |
5067 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
5068 | ||
5069 | return 0; | |
5070 | } | |
5071 | ||
5c408ad8 JD |
5072 | /* |
5073 | * Command LTTNG_ROTATE_SESSION from the lttng-ctl library. | |
5074 | * | |
5075 | * Ask the consumer to rotate the session output directory. | |
5076 | * The session lock must be held. | |
5077 | * | |
d5a1b7aa | 5078 | * Returns LTTNG_OK on success or else a negative LTTng error code. |
5c408ad8 JD |
5079 | */ |
5080 | int cmd_rotate_session(struct ltt_session *session, | |
7fdbed1c | 5081 | struct lttng_rotate_session_return *rotate_return, |
343defc2 MD |
5082 | bool quiet_rotation, |
5083 | enum lttng_trace_chunk_command_type command) | |
5c408ad8 JD |
5084 | { |
5085 | int ret; | |
d2956687 | 5086 | uint64_t ongoing_rotation_chunk_id; |
d5a1b7aa | 5087 | enum lttng_error_code cmd_ret = LTTNG_OK; |
d2956687 JG |
5088 | struct lttng_trace_chunk *chunk_being_archived = NULL; |
5089 | struct lttng_trace_chunk *new_trace_chunk = NULL; | |
5090 | enum lttng_trace_chunk_status chunk_status; | |
3156892b JG |
5091 | bool failed_to_rotate = false; |
5092 | enum lttng_error_code rotation_fail_code = LTTNG_OK; | |
5c408ad8 JD |
5093 | |
5094 | assert(session); | |
5095 | ||
5096 | if (!session->has_been_started) { | |
d5a1b7aa | 5097 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
d68c9a04 | 5098 | goto end; |
5c408ad8 JD |
5099 | } |
5100 | ||
d48d65e1 MD |
5101 | /* |
5102 | * Explicit rotation is not supported for live sessions. | |
5103 | * However, live sessions can perform a quiet rotation on | |
5104 | * destroy. | |
5105 | * Rotation is not supported for snapshot traces (no output). | |
5106 | */ | |
5107 | if ((!quiet_rotation && session->live_timer) || | |
5108 | !session->output_traces) { | |
d5a1b7aa | 5109 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
d68c9a04 | 5110 | goto end; |
5c408ad8 JD |
5111 | } |
5112 | ||
d2956687 | 5113 | /* Unsupported feature in lttng-relayd before 2.11. */ |
070b6a86 | 5114 | if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET && |
5c408ad8 JD |
5115 | (session->consumer->relay_major_version == 2 && |
5116 | session->consumer->relay_minor_version < 11)) { | |
d5a1b7aa | 5117 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY; |
d68c9a04 | 5118 | goto end; |
5c408ad8 JD |
5119 | } |
5120 | ||
a40a503f MD |
5121 | /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */ |
5122 | if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) { | |
5123 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL; | |
5124 | goto end; | |
5125 | } | |
5126 | ||
92816cc3 | 5127 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
92816cc3 JG |
5128 | DBG("Refusing to launch a rotation; a rotation is already in progress for session %s", |
5129 | session->name); | |
d5a1b7aa | 5130 | cmd_ret = LTTNG_ERR_ROTATION_PENDING; |
d68c9a04 | 5131 | goto end; |
5c408ad8 JD |
5132 | } |
5133 | ||
5134 | /* | |
5135 | * After a stop, we only allow one rotation to occur, the other ones are | |
5136 | * useless until a new start. | |
5137 | */ | |
5138 | if (session->rotated_after_last_stop) { | |
5139 | DBG("Session \"%s\" was already rotated after stop, refusing rotation", | |
5140 | session->name); | |
d5a1b7aa | 5141 | cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; |
d68c9a04 | 5142 | goto end; |
5c408ad8 | 5143 | } |
b02f5986 MD |
5144 | |
5145 | /* | |
5146 | * After a stop followed by a clear, disallow following rotations a they would | |
5147 | * generate empty chunks. | |
5148 | */ | |
5149 | if (session->cleared_after_last_stop) { | |
5150 | DBG("Session \"%s\" was already cleared after stop, refusing rotation", | |
5151 | session->name); | |
5152 | cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR; | |
5153 | goto end; | |
5154 | } | |
5155 | ||
d2956687 | 5156 | if (session->active) { |
348a81dc | 5157 | new_trace_chunk = session_create_new_trace_chunk(session, NULL, |
d2956687 JG |
5158 | NULL, NULL); |
5159 | if (!new_trace_chunk) { | |
5160 | cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
5161 | goto error; | |
5c408ad8 | 5162 | } |
d2956687 | 5163 | } |
2961f09e | 5164 | |
3156892b JG |
5165 | /* |
5166 | * The current trace chunk becomes the chunk being archived. | |
5167 | * | |
5168 | * After this point, "chunk_being_archived" must absolutely | |
5169 | * be closed on the consumer(s), otherwise it will never be | |
5170 | * cleaned-up, which will result in a leak. | |
5171 | */ | |
d2956687 JG |
5172 | ret = session_set_trace_chunk(session, new_trace_chunk, |
5173 | &chunk_being_archived); | |
5174 | if (ret) { | |
5175 | cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
b178f53e JG |
5176 | goto error; |
5177 | } | |
5178 | ||
5c408ad8 | 5179 | if (session->kernel_session) { |
d5a1b7aa JG |
5180 | cmd_ret = kernel_rotate_session(session); |
5181 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5182 | failed_to_rotate = true; |
5183 | rotation_fail_code = cmd_ret; | |
5c408ad8 JD |
5184 | } |
5185 | } | |
5186 | if (session->ust_session) { | |
d5a1b7aa JG |
5187 | cmd_ret = ust_app_rotate_session(session); |
5188 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5189 | failed_to_rotate = true; |
5190 | rotation_fail_code = cmd_ret; | |
5c408ad8 | 5191 | } |
92816cc3 | 5192 | } |
17dd1232 | 5193 | |
3b61d9ee JG |
5194 | if (!session->active) { |
5195 | session->rotated_after_last_stop = true; | |
5196 | } | |
5197 | ||
5198 | if (!chunk_being_archived) { | |
5199 | DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check", | |
5200 | session->name); | |
5201 | if (failed_to_rotate) { | |
5202 | cmd_ret = rotation_fail_code; | |
5203 | goto error; | |
5204 | } | |
5205 | cmd_ret = LTTNG_OK; | |
5206 | goto end; | |
5207 | } | |
5208 | ||
5209 | session->rotation_state = LTTNG_ROTATION_STATE_ONGOING; | |
5210 | chunk_status = lttng_trace_chunk_get_id(chunk_being_archived, | |
5211 | &ongoing_rotation_chunk_id); | |
5212 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5213 | ||
bbc4768c | 5214 | ret = session_close_trace_chunk(session, chunk_being_archived, |
343defc2 | 5215 | command, session->last_chunk_path); |
d2956687 JG |
5216 | if (ret) { |
5217 | cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; | |
5218 | goto error; | |
5219 | } | |
5220 | ||
3156892b JG |
5221 | if (failed_to_rotate) { |
5222 | cmd_ret = rotation_fail_code; | |
5223 | goto error; | |
5224 | } | |
5225 | ||
7fdbed1c | 5226 | session->quiet_rotation = quiet_rotation; |
92816cc3 JG |
5227 | ret = timer_session_rotation_pending_check_start(session, |
5228 | DEFAULT_ROTATE_PENDING_TIMER); | |
5229 | if (ret) { | |
d5a1b7aa | 5230 | cmd_ret = LTTNG_ERR_UNK; |
2961f09e | 5231 | goto error; |
5c408ad8 JD |
5232 | } |
5233 | ||
5c408ad8 | 5234 | if (rotate_return) { |
d2956687 | 5235 | rotate_return->rotation_id = ongoing_rotation_chunk_id; |
5c408ad8 JD |
5236 | } |
5237 | ||
d2956687 JG |
5238 | session->chunk_being_archived = chunk_being_archived; |
5239 | chunk_being_archived = NULL; | |
7fdbed1c JG |
5240 | if (!quiet_rotation) { |
5241 | ret = notification_thread_command_session_rotation_ongoing( | |
5242 | notification_thread_handle, | |
5243 | session->name, session->uid, session->gid, | |
5244 | ongoing_rotation_chunk_id); | |
5245 | if (ret != LTTNG_OK) { | |
5246 | ERR("Failed to notify notification thread that a session rotation is ongoing for session %s", | |
5247 | session->name); | |
5248 | cmd_ret = ret; | |
5249 | } | |
2961f09e JG |
5250 | } |
5251 | ||
92816cc3 | 5252 | DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent", |
d2956687 | 5253 | session->name, ongoing_rotation_chunk_id); |
5c408ad8 | 5254 | end: |
d2956687 JG |
5255 | lttng_trace_chunk_put(new_trace_chunk); |
5256 | lttng_trace_chunk_put(chunk_being_archived); | |
d5a1b7aa | 5257 | ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret); |
5c408ad8 | 5258 | return ret; |
2961f09e | 5259 | error: |
2961f09e | 5260 | if (session_reset_rotation_state(session, |
d2956687 | 5261 | LTTNG_ROTATION_STATE_ERROR)) { |
2961f09e JG |
5262 | ERR("Failed to reset rotation state of session \"%s\"", |
5263 | session->name); | |
5264 | } | |
5265 | goto end; | |
5c408ad8 JD |
5266 | } |
5267 | ||
5268 | /* | |
d68c9a04 | 5269 | * Command LTTNG_ROTATION_GET_INFO from the lttng-ctl library. |
5c408ad8 JD |
5270 | * |
5271 | * Check if the session has finished its rotation. | |
5272 | * | |
d2956687 | 5273 | * Return LTTNG_OK on success or else an LTTNG_ERR code. |
5c408ad8 | 5274 | */ |
d68c9a04 JD |
5275 | int cmd_rotate_get_info(struct ltt_session *session, |
5276 | struct lttng_rotation_get_info_return *info_return, | |
5277 | uint64_t rotation_id) | |
5c408ad8 | 5278 | { |
d2956687 JG |
5279 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5280 | enum lttng_rotation_state rotation_state; | |
5c408ad8 | 5281 | |
d68c9a04 | 5282 | DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, session->name, |
d2956687 | 5283 | session->most_recent_chunk_id.value); |
5c408ad8 | 5284 | |
d2956687 JG |
5285 | if (session->chunk_being_archived) { |
5286 | enum lttng_trace_chunk_status chunk_status; | |
5287 | uint64_t chunk_id; | |
5288 | ||
5289 | chunk_status = lttng_trace_chunk_get_id( | |
5290 | session->chunk_being_archived, | |
5291 | &chunk_id); | |
5292 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5293 | ||
5294 | rotation_state = rotation_id == chunk_id ? | |
5295 | LTTNG_ROTATION_STATE_ONGOING : | |
5296 | LTTNG_ROTATION_STATE_EXPIRED; | |
5297 | } else { | |
5298 | if (session->last_archived_chunk_id.is_set && | |
5299 | rotation_id != session->last_archived_chunk_id.value) { | |
5300 | rotation_state = LTTNG_ROTATION_STATE_EXPIRED; | |
5301 | } else { | |
5302 | rotation_state = session->rotation_state; | |
5303 | } | |
5c408ad8 JD |
5304 | } |
5305 | ||
d2956687 JG |
5306 | switch (rotation_state) { |
5307 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
83ed9e90 | 5308 | DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"", |
d2956687 JG |
5309 | session->name); |
5310 | goto end; | |
5311 | case LTTNG_ROTATION_STATE_EXPIRED: | |
5312 | DBG("Reporting that the rotation state of rotation id %" PRIu64 " of session \"%s\" has expired", | |
5313 | rotation_id, session->name); | |
5314 | break; | |
d68c9a04 | 5315 | case LTTNG_ROTATION_STATE_ONGOING: |
d2956687 | 5316 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending", |
d68c9a04 JD |
5317 | rotation_id, session->name); |
5318 | break; | |
5319 | case LTTNG_ROTATION_STATE_COMPLETED: | |
dd73d57b | 5320 | { |
d2956687 JG |
5321 | int fmt_ret; |
5322 | char *chunk_path; | |
dd73d57b JG |
5323 | char *current_tracing_path_reply; |
5324 | size_t current_tracing_path_reply_len; | |
5325 | ||
d2956687 JG |
5326 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed", |
5327 | rotation_id, session->name); | |
5328 | ||
dd73d57b JG |
5329 | switch (session_get_consumer_destination_type(session)) { |
5330 | case CONSUMER_DST_LOCAL: | |
5331 | current_tracing_path_reply = | |
5332 | info_return->location.local.absolute_path; | |
5333 | current_tracing_path_reply_len = | |
5334 | sizeof(info_return->location.local.absolute_path); | |
5335 | info_return->location_type = | |
05f8afa9 | 5336 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL; |
ecd1a12f MD |
5337 | fmt_ret = asprintf(&chunk_path, |
5338 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", | |
5339 | session_get_base_path(session), | |
5340 | session->last_archived_chunk_name); | |
5341 | if (fmt_ret == -1) { | |
5342 | PERROR("Failed to format the path of the last archived trace chunk"); | |
5343 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5344 | cmd_ret = LTTNG_ERR_UNK; | |
5345 | goto end; | |
5346 | } | |
dd73d57b JG |
5347 | break; |
5348 | case CONSUMER_DST_NET: | |
09cfbe47 JG |
5349 | { |
5350 | uint16_t ctrl_port, data_port; | |
5351 | ||
dd73d57b JG |
5352 | current_tracing_path_reply = |
5353 | info_return->location.relay.relative_path; | |
5354 | current_tracing_path_reply_len = | |
5355 | sizeof(info_return->location.relay.relative_path); | |
5356 | /* Currently the only supported relay protocol. */ | |
5357 | info_return->location.relay.protocol = | |
05f8afa9 | 5358 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP; |
dd73d57b | 5359 | |
d2956687 | 5360 | fmt_ret = lttng_strncpy(info_return->location.relay.host, |
dd73d57b JG |
5361 | session_get_net_consumer_hostname(session), |
5362 | sizeof(info_return->location.relay.host)); | |
d2956687 JG |
5363 | if (fmt_ret) { |
5364 | ERR("Failed to copy host name to rotate_get_info reply"); | |
dd73d57b | 5365 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5366 | cmd_ret = LTTNG_ERR_SET_URL; |
dd73d57b JG |
5367 | goto end; |
5368 | } | |
5369 | ||
09cfbe47 JG |
5370 | session_get_net_consumer_ports(session, &ctrl_port, &data_port); |
5371 | info_return->location.relay.ports.control = ctrl_port; | |
5372 | info_return->location.relay.ports.data = data_port; | |
dd73d57b | 5373 | info_return->location_type = |
05f8afa9 | 5374 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY; |
ecd1a12f MD |
5375 | chunk_path = strdup(session->last_chunk_path); |
5376 | if (!chunk_path) { | |
5377 | ERR("Failed to allocate the path of the last archived trace chunk"); | |
5378 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5379 | cmd_ret = LTTNG_ERR_UNK; | |
5380 | goto end; | |
5381 | } | |
dd73d57b | 5382 | break; |
09cfbe47 | 5383 | } |
dd73d57b JG |
5384 | default: |
5385 | abort(); | |
5386 | } | |
d2956687 JG |
5387 | |
5388 | fmt_ret = lttng_strncpy(current_tracing_path_reply, | |
5389 | chunk_path, current_tracing_path_reply_len); | |
5390 | free(chunk_path); | |
5391 | if (fmt_ret) { | |
5392 | ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply"); | |
d68c9a04 | 5393 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5394 | cmd_ret = LTTNG_ERR_UNK; |
5c408ad8 JD |
5395 | goto end; |
5396 | } | |
dd73d57b | 5397 | |
d68c9a04 | 5398 | break; |
dd73d57b | 5399 | } |
d68c9a04 | 5400 | case LTTNG_ROTATION_STATE_ERROR: |
d2956687 | 5401 | DBG("Reporting that an error occurred during rotation %" PRIu64 " of session \"%s\"", |
d68c9a04 JD |
5402 | rotation_id, session->name); |
5403 | break; | |
5404 | default: | |
5405 | abort(); | |
5c408ad8 JD |
5406 | } |
5407 | ||
d2956687 | 5408 | cmd_ret = LTTNG_OK; |
5c408ad8 | 5409 | end: |
d2956687 JG |
5410 | info_return->status = (int32_t) rotation_state; |
5411 | return cmd_ret; | |
5c408ad8 JD |
5412 | } |
5413 | ||
259c2674 JD |
5414 | /* |
5415 | * Command LTTNG_ROTATION_SET_SCHEDULE from the lttng-ctl library. | |
5416 | * | |
5417 | * Configure the automatic rotation parameters. | |
66ea93b1 JG |
5418 | * 'activate' to true means activate the rotation schedule type with 'new_value'. |
5419 | * 'activate' to false means deactivate the rotation schedule and validate that | |
5420 | * 'new_value' has the same value as the currently active value. | |
259c2674 | 5421 | * |
66ea93b1 | 5422 | * Return 0 on success or else a positive LTTNG_ERR code. |
259c2674 JD |
5423 | */ |
5424 | int cmd_rotation_set_schedule(struct ltt_session *session, | |
66ea93b1 JG |
5425 | bool activate, enum lttng_rotation_schedule_type schedule_type, |
5426 | uint64_t new_value, | |
90936dcf | 5427 | struct notification_thread_handle *notification_thread_handle) |
259c2674 JD |
5428 | { |
5429 | int ret; | |
66ea93b1 | 5430 | uint64_t *parameter_value; |
259c2674 JD |
5431 | |
5432 | assert(session); | |
5433 | ||
5434 | DBG("Cmd rotate set schedule session %s", session->name); | |
5435 | ||
92fe5ca1 | 5436 | if (session->live_timer || !session->output_traces) { |
66ea93b1 | 5437 | DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session"); |
259c2674 JD |
5438 | ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
5439 | goto end; | |
5440 | } | |
5441 | ||
66ea93b1 JG |
5442 | switch (schedule_type) { |
5443 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5444 | parameter_value = &session->rotate_size; | |
5445 | break; | |
5446 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5447 | parameter_value = &session->rotate_timer_period; | |
5448 | if (new_value >= UINT_MAX) { | |
5449 | DBG("Failing ROTATION_SET_SCHEDULE command as the value requested for a periodic rotation schedule is invalid: %" PRIu64 " > %u (UINT_MAX)", | |
5450 | new_value, UINT_MAX); | |
5451 | ret = LTTNG_ERR_INVALID; | |
5452 | goto end; | |
5453 | } | |
5454 | break; | |
5455 | default: | |
5456 | WARN("Failing ROTATION_SET_SCHEDULE command on unknown schedule type"); | |
5457 | ret = LTTNG_ERR_INVALID; | |
259c2674 | 5458 | goto end; |
66ea93b1 JG |
5459 | } |
5460 | ||
5461 | /* Improper use of the API. */ | |
5462 | if (new_value == -1ULL) { | |
5463 | WARN("Failing ROTATION_SET_SCHEDULE command as the value requested is -1"); | |
5464 | ret = LTTNG_ERR_INVALID; | |
259c2674 JD |
5465 | goto end; |
5466 | } | |
5467 | ||
66ea93b1 JG |
5468 | /* |
5469 | * As indicated in struct ltt_session's comments, a value of == 0 means | |
5470 | * this schedule rotation type is not in use. | |
5471 | * | |
5472 | * Reject the command if we were asked to activate a schedule that was | |
5473 | * already active. | |
5474 | */ | |
5475 | if (activate && *parameter_value != 0) { | |
5476 | DBG("Failing ROTATION_SET_SCHEDULE (activate) command as the schedule is already active"); | |
5477 | ret = LTTNG_ERR_ROTATION_SCHEDULE_SET; | |
90936dcf | 5478 | goto end; |
66ea93b1 JG |
5479 | } |
5480 | ||
5481 | /* | |
5482 | * Reject the command if we were asked to deactivate a schedule that was | |
5483 | * not active. | |
5484 | */ | |
5485 | if (!activate && *parameter_value == 0) { | |
5486 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as the schedule is already inactive"); | |
5487 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
90936dcf JD |
5488 | goto end; |
5489 | } | |
5490 | ||
66ea93b1 JG |
5491 | /* |
5492 | * Reject the command if we were asked to deactivate a schedule that | |
5493 | * doesn't exist. | |
5494 | */ | |
5495 | if (!activate && *parameter_value != new_value) { | |
5496 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as an inexistant schedule was provided"); | |
5497 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
5498 | goto end; | |
5499 | } | |
259c2674 | 5500 | |
66ea93b1 JG |
5501 | *parameter_value = activate ? new_value : 0; |
5502 | ||
5503 | switch (schedule_type) { | |
5504 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5505 | if (activate && session->active) { | |
5506 | /* | |
5507 | * Only start the timer if the session is active, | |
5508 | * otherwise it will be started when the session starts. | |
5509 | */ | |
92816cc3 JG |
5510 | ret = timer_session_rotation_schedule_timer_start( |
5511 | session, new_value); | |
259c2674 | 5512 | if (ret) { |
66ea93b1 | 5513 | ERR("Failed to enable session rotation timer in ROTATION_SET_SCHEDULE command"); |
259c2674 JD |
5514 | ret = LTTNG_ERR_UNK; |
5515 | goto end; | |
5516 | } | |
66ea93b1 | 5517 | } else { |
92816cc3 JG |
5518 | ret = timer_session_rotation_schedule_timer_stop( |
5519 | session); | |
66ea93b1 JG |
5520 | if (ret) { |
5521 | ERR("Failed to disable session rotation timer in ROTATION_SET_SCHEDULE command"); | |
5522 | ret = LTTNG_ERR_UNK; | |
f3ce6946 | 5523 | goto end; |
66ea93b1 | 5524 | } |
259c2674 | 5525 | } |
66ea93b1 JG |
5526 | break; |
5527 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5528 | if (activate) { | |
5529 | ret = subscribe_session_consumed_size_rotation(session, | |
5530 | new_value, notification_thread_handle); | |
90936dcf | 5531 | if (ret) { |
66ea93b1 | 5532 | ERR("Failed to enable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5533 | ret = LTTNG_ERR_UNK; |
5534 | goto end; | |
5535 | } | |
90936dcf | 5536 | } else { |
66ea93b1 JG |
5537 | ret = unsubscribe_session_consumed_size_rotation(session, |
5538 | notification_thread_handle); | |
90936dcf | 5539 | if (ret) { |
66ea93b1 | 5540 | ERR("Failed to disable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5541 | ret = LTTNG_ERR_UNK; |
5542 | goto end; | |
5543 | } | |
66ea93b1 | 5544 | |
90936dcf | 5545 | } |
66ea93b1 JG |
5546 | break; |
5547 | default: | |
5548 | /* Would have been caught before. */ | |
5549 | abort(); | |
90936dcf JD |
5550 | } |
5551 | ||
259c2674 JD |
5552 | ret = LTTNG_OK; |
5553 | ||
5554 | goto end; | |
5555 | ||
5556 | end: | |
5557 | return ret; | |
5558 | } | |
5559 | ||
a503e1ef JG |
5560 | /* Wait for a given path to be removed before continuing. */ |
5561 | static enum lttng_error_code wait_on_path(void *path_data) | |
5562 | { | |
5563 | const char *shm_path = path_data; | |
5564 | ||
5565 | DBG("Waiting for the shm path at %s to be removed before completing session destruction", | |
5566 | shm_path); | |
5567 | while (true) { | |
5568 | int ret; | |
5569 | struct stat st; | |
5570 | ||
5571 | ret = stat(shm_path, &st); | |
5572 | if (ret) { | |
5573 | if (errno != ENOENT) { | |
5574 | PERROR("stat() returned an error while checking for the existence of the shm path"); | |
5575 | } else { | |
5576 | DBG("shm path no longer exists, completing the destruction of session"); | |
5577 | } | |
5578 | break; | |
5579 | } else { | |
5580 | if (!S_ISDIR(st.st_mode)) { | |
5581 | ERR("The type of shm path %s returned by stat() is not a directory; aborting the wait for shm path removal", | |
5582 | shm_path); | |
5583 | break; | |
5584 | } | |
5585 | } | |
5586 | usleep(SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US); | |
5587 | } | |
5588 | return LTTNG_OK; | |
5589 | } | |
5590 | ||
5591 | /* | |
5592 | * Returns a pointer to a handler to run on completion of a command. | |
5593 | * Returns NULL if no handler has to be run for the last command executed. | |
5594 | */ | |
5595 | const struct cmd_completion_handler *cmd_pop_completion_handler(void) | |
5596 | { | |
5597 | struct cmd_completion_handler *handler = current_completion_handler; | |
5598 | ||
5599 | current_completion_handler = NULL; | |
5600 | return handler; | |
5601 | } | |
5602 | ||
2f77fc4b DG |
5603 | /* |
5604 | * Init command subsystem. | |
5605 | */ | |
5606 | void cmd_init(void) | |
5607 | { | |
5608 | /* | |
d88aee68 DG |
5609 | * Set network sequence index to 1 for streams to match a relayd |
5610 | * socket on the consumer side. | |
2f77fc4b | 5611 | */ |
d88aee68 DG |
5612 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
5613 | relayd_net_seq_idx = 1; | |
5614 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
5615 | |
5616 | DBG("Command subsystem initialized"); | |
5617 | } |