Commit | Line | Data |
---|---|---|
2f77fc4b DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
20 | #include <urcu/list.h> | |
21 | #include <urcu/uatomic.h> | |
22 | ||
23 | #include <common/defaults.h> | |
24 | #include <common/common.h> | |
25 | #include <common/sessiond-comm/sessiond-comm.h> | |
26 | #include <common/relayd/relayd.h> | |
27 | ||
28 | #include "channel.h" | |
29 | #include "consumer.h" | |
30 | #include "event.h" | |
31 | #include "kernel.h" | |
32 | #include "kernel-consumer.h" | |
33 | #include "lttng-sessiond.h" | |
34 | #include "utils.h" | |
35 | ||
36 | #include "cmd.h" | |
37 | ||
38 | /* | |
39 | * Used to keep a unique index for each relayd socket created where this value | |
40 | * is associated with streams on the consumer so it can match the right relayd | |
41 | * to send to. | |
42 | * | |
43 | * This value should be incremented atomically for safety purposes and future | |
44 | * possible concurrent access. | |
45 | */ | |
46 | static unsigned int relayd_net_seq_idx; | |
47 | ||
48 | /* | |
49 | * Create a session path used by list_lttng_sessions for the case that the | |
50 | * session consumer is on the network. | |
51 | */ | |
52 | static int build_network_session_path(char *dst, size_t size, | |
53 | struct ltt_session *session) | |
54 | { | |
55 | int ret, kdata_port, udata_port; | |
56 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
57 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
58 | ||
59 | assert(session); | |
60 | assert(dst); | |
61 | ||
62 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
63 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
64 | ||
65 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
66 | ||
67 | if (session->kernel_session && session->kernel_session->consumer) { | |
68 | kuri = &session->kernel_session->consumer->dst.net.control; | |
69 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
70 | } | |
71 | ||
72 | if (session->ust_session && session->ust_session->consumer) { | |
73 | uuri = &session->ust_session->consumer->dst.net.control; | |
74 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
75 | } | |
76 | ||
77 | if (uuri == NULL && kuri == NULL) { | |
78 | uri = &session->consumer->dst.net.control; | |
79 | kdata_port = session->consumer->dst.net.data.port; | |
80 | } else if (kuri && uuri) { | |
81 | ret = uri_compare(kuri, uuri); | |
82 | if (ret) { | |
83 | /* Not Equal */ | |
84 | uri = kuri; | |
85 | /* Build uuri URL string */ | |
86 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
87 | if (ret < 0) { | |
88 | goto error; | |
89 | } | |
90 | } else { | |
91 | uri = kuri; | |
92 | } | |
93 | } else if (kuri && uuri == NULL) { | |
94 | uri = kuri; | |
95 | } else if (uuri && kuri == NULL) { | |
96 | uri = uuri; | |
97 | } | |
98 | ||
99 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
100 | if (ret < 0) { | |
101 | goto error; | |
102 | } | |
103 | ||
104 | if (strlen(tmp_uurl) > 0) { | |
105 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", | |
106 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
107 | } else { | |
108 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, kdata_port); | |
109 | } | |
110 | ||
111 | error: | |
112 | return ret; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Fill lttng_channel array of all channels. | |
117 | */ | |
118 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
119 | struct lttng_channel *channels) | |
120 | { | |
121 | int i = 0; | |
122 | struct ltt_kernel_channel *kchan; | |
123 | ||
124 | DBG("Listing channels for session %s", session->name); | |
125 | ||
126 | switch (domain) { | |
127 | case LTTNG_DOMAIN_KERNEL: | |
128 | /* Kernel channels */ | |
129 | if (session->kernel_session != NULL) { | |
130 | cds_list_for_each_entry(kchan, | |
131 | &session->kernel_session->channel_list.head, list) { | |
132 | /* Copy lttng_channel struct to array */ | |
133 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
134 | channels[i].enabled = kchan->enabled; | |
135 | i++; | |
136 | } | |
137 | } | |
138 | break; | |
139 | case LTTNG_DOMAIN_UST: | |
140 | { | |
141 | struct lttng_ht_iter iter; | |
142 | struct ltt_ust_channel *uchan; | |
143 | ||
144 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
145 | &iter.iter, uchan, node.node) { | |
146 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
147 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
148 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
149 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
150 | channels[i].attr.switch_timer_interval = | |
151 | uchan->attr.switch_timer_interval; | |
152 | channels[i].attr.read_timer_interval = | |
153 | uchan->attr.read_timer_interval; | |
154 | channels[i].enabled = uchan->enabled; | |
155 | switch (uchan->attr.output) { | |
156 | case LTTNG_UST_MMAP: | |
157 | default: | |
158 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
159 | break; | |
160 | } | |
161 | i++; | |
162 | } | |
163 | break; | |
164 | } | |
165 | default: | |
166 | break; | |
167 | } | |
168 | } | |
169 | ||
170 | /* | |
171 | * Create a list of ust global domain events. | |
172 | */ | |
173 | static int list_lttng_ust_global_events(char *channel_name, | |
174 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
175 | { | |
176 | int i = 0, ret = 0; | |
177 | unsigned int nb_event = 0; | |
178 | struct lttng_ht_iter iter; | |
179 | struct lttng_ht_node_str *node; | |
180 | struct ltt_ust_channel *uchan; | |
181 | struct ltt_ust_event *uevent; | |
182 | struct lttng_event *tmp; | |
183 | ||
184 | DBG("Listing UST global events for channel %s", channel_name); | |
185 | ||
186 | rcu_read_lock(); | |
187 | ||
188 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
189 | node = lttng_ht_iter_get_node_str(&iter); | |
190 | if (node == NULL) { | |
f73fabfd | 191 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
192 | goto error; |
193 | } | |
194 | ||
195 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
196 | ||
197 | nb_event += lttng_ht_get_count(uchan->events); | |
198 | ||
199 | if (nb_event == 0) { | |
200 | ret = nb_event; | |
201 | goto error; | |
202 | } | |
203 | ||
204 | DBG3("Listing UST global %d events", nb_event); | |
205 | ||
206 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
207 | if (tmp == NULL) { | |
f73fabfd | 208 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
209 | goto error; |
210 | } | |
211 | ||
212 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
213 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
214 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
215 | tmp[i].enabled = uevent->enabled; | |
216 | ||
217 | switch (uevent->attr.instrumentation) { | |
218 | case LTTNG_UST_TRACEPOINT: | |
219 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
220 | break; | |
221 | case LTTNG_UST_PROBE: | |
222 | tmp[i].type = LTTNG_EVENT_PROBE; | |
223 | break; | |
224 | case LTTNG_UST_FUNCTION: | |
225 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
226 | break; | |
227 | } | |
228 | ||
229 | tmp[i].loglevel = uevent->attr.loglevel; | |
230 | switch (uevent->attr.loglevel_type) { | |
231 | case LTTNG_UST_LOGLEVEL_ALL: | |
232 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
233 | break; | |
234 | case LTTNG_UST_LOGLEVEL_RANGE: | |
235 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
236 | break; | |
237 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
238 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
239 | break; | |
240 | } | |
241 | if (uevent->filter) { | |
242 | tmp[i].filter = 1; | |
243 | } | |
244 | i++; | |
245 | } | |
246 | ||
247 | ret = nb_event; | |
248 | *events = tmp; | |
249 | ||
250 | error: | |
251 | rcu_read_unlock(); | |
252 | return ret; | |
253 | } | |
254 | ||
255 | /* | |
256 | * Fill lttng_event array of all kernel events in the channel. | |
257 | */ | |
258 | static int list_lttng_kernel_events(char *channel_name, | |
259 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
260 | { | |
261 | int i = 0, ret; | |
262 | unsigned int nb_event; | |
263 | struct ltt_kernel_event *event; | |
264 | struct ltt_kernel_channel *kchan; | |
265 | ||
266 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
267 | if (kchan == NULL) { | |
f73fabfd | 268 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
269 | goto error; |
270 | } | |
271 | ||
272 | nb_event = kchan->event_count; | |
273 | ||
274 | DBG("Listing events for channel %s", kchan->channel->name); | |
275 | ||
276 | if (nb_event == 0) { | |
f73fabfd | 277 | goto end; |
2f77fc4b DG |
278 | } |
279 | ||
280 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
281 | if (*events == NULL) { | |
f73fabfd | 282 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
283 | goto error; |
284 | } | |
285 | ||
286 | /* Kernel channels */ | |
287 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
288 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
289 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
290 | (*events)[i].enabled = event->enabled; | |
291 | ||
292 | switch (event->event->instrumentation) { | |
293 | case LTTNG_KERNEL_TRACEPOINT: | |
294 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
295 | break; | |
296 | case LTTNG_KERNEL_KPROBE: | |
297 | case LTTNG_KERNEL_KRETPROBE: | |
298 | (*events)[i].type = LTTNG_EVENT_PROBE; | |
299 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
300 | sizeof(struct lttng_kernel_kprobe)); | |
301 | break; | |
302 | case LTTNG_KERNEL_FUNCTION: | |
303 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
304 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
305 | sizeof(struct lttng_kernel_function)); | |
306 | break; | |
307 | case LTTNG_KERNEL_NOOP: | |
308 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
309 | break; | |
310 | case LTTNG_KERNEL_SYSCALL: | |
311 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
312 | break; | |
313 | case LTTNG_KERNEL_ALL: | |
314 | assert(0); | |
315 | break; | |
316 | } | |
317 | i++; | |
318 | } | |
319 | ||
f73fabfd | 320 | end: |
2f77fc4b DG |
321 | return nb_event; |
322 | ||
323 | error: | |
f73fabfd DG |
324 | /* Negate the error code to differentiate the size from an error */ |
325 | return -ret; | |
2f77fc4b DG |
326 | } |
327 | ||
328 | /* | |
329 | * Add URI so the consumer output object. Set the correct path depending on the | |
330 | * domain adding the default trace directory. | |
331 | */ | |
332 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
333 | struct lttng_uri *uri, int domain, const char *session_name) | |
334 | { | |
f73fabfd | 335 | int ret = LTTNG_OK; |
2f77fc4b DG |
336 | const char *default_trace_dir; |
337 | ||
338 | assert(uri); | |
339 | ||
340 | if (consumer == NULL) { | |
341 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 342 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
343 | goto error; |
344 | } | |
345 | ||
346 | switch (domain) { | |
347 | case LTTNG_DOMAIN_KERNEL: | |
348 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
349 | break; | |
350 | case LTTNG_DOMAIN_UST: | |
351 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
352 | break; | |
353 | default: | |
354 | /* | |
355 | * This case is possible is we try to add the URI to the global tracing | |
356 | * session consumer object which in this case there is no subdir. | |
357 | */ | |
358 | default_trace_dir = ""; | |
359 | } | |
360 | ||
361 | switch (uri->dtype) { | |
362 | case LTTNG_DST_IPV4: | |
363 | case LTTNG_DST_IPV6: | |
364 | DBG2("Setting network URI to consumer"); | |
365 | ||
366 | /* Set URI into consumer output object */ | |
367 | ret = consumer_set_network_uri(consumer, uri); | |
368 | if (ret < 0) { | |
f73fabfd | 369 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
370 | goto error; |
371 | } else if (ret == 1) { | |
372 | /* | |
373 | * URI was the same in the consumer so we do not append the subdir | |
374 | * again so to not duplicate output dir. | |
375 | */ | |
376 | goto error; | |
377 | } | |
378 | ||
379 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
380 | ret = consumer_set_subdir(consumer, session_name); | |
381 | if (ret < 0) { | |
f73fabfd | 382 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
383 | goto error; |
384 | } | |
385 | } | |
386 | ||
387 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
388 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
389 | strncat(consumer->subdir, default_trace_dir, |
390 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
391 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
392 | } | |
393 | ||
394 | break; | |
395 | case LTTNG_DST_PATH: | |
396 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
397 | memset(consumer->dst.trace_path, 0, | |
398 | sizeof(consumer->dst.trace_path)); | |
399 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
400 | sizeof(consumer->dst.trace_path)); | |
401 | /* Append default trace dir */ | |
402 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
403 | sizeof(consumer->dst.trace_path) - |
404 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
405 | /* Flag consumer as local. */ |
406 | consumer->type = CONSUMER_DST_LOCAL; | |
407 | break; | |
408 | } | |
409 | ||
410 | error: | |
411 | return ret; | |
412 | } | |
413 | ||
414 | /* | |
415 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
416 | */ | |
417 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
418 | { | |
419 | int ret = 0; | |
420 | struct lttng_ht_iter iter; | |
421 | struct consumer_socket *socket; | |
422 | ||
423 | assert(session); | |
424 | ||
425 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { | |
426 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
427 | socket, node.node) { | |
428 | /* Code flow error */ | |
429 | assert(socket->fd >= 0); | |
430 | ||
431 | pthread_mutex_lock(socket->lock); | |
432 | ret = kernel_consumer_send_session(socket->fd, session); | |
433 | pthread_mutex_unlock(socket->lock); | |
434 | if (ret < 0) { | |
f73fabfd | 435 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
436 | goto error; |
437 | } | |
438 | } | |
439 | } | |
440 | ||
441 | error: | |
442 | return ret; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Create a socket to the relayd using the URI. | |
447 | * | |
448 | * On success, the relayd_sock pointer is set to the created socket. | |
449 | * Else, it's stays untouched and a lttcomm error code is returned. | |
450 | */ | |
451 | static int create_connect_relayd(struct consumer_output *output, | |
452 | const char *session_name, struct lttng_uri *uri, | |
453 | struct lttcomm_sock **relayd_sock) | |
454 | { | |
455 | int ret; | |
456 | struct lttcomm_sock *sock; | |
457 | ||
458 | /* Create socket object from URI */ | |
459 | sock = lttcomm_alloc_sock_from_uri(uri); | |
460 | if (sock == NULL) { | |
f73fabfd | 461 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
462 | goto error; |
463 | } | |
464 | ||
465 | ret = lttcomm_create_sock(sock); | |
466 | if (ret < 0) { | |
f73fabfd | 467 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
468 | goto error; |
469 | } | |
470 | ||
471 | /* Connect to relayd so we can proceed with a session creation. */ | |
472 | ret = relayd_connect(sock); | |
473 | if (ret < 0) { | |
474 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 475 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
476 | goto free_sock; |
477 | } | |
478 | ||
479 | /* Create socket for control stream. */ | |
480 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
481 | DBG3("Creating relayd stream socket from URI"); | |
482 | ||
483 | /* Check relayd version */ | |
484 | ret = relayd_version_check(sock, RELAYD_VERSION_COMM_MAJOR, | |
485 | RELAYD_VERSION_COMM_MINOR); | |
486 | if (ret < 0) { | |
f73fabfd | 487 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
488 | goto close_sock; |
489 | } | |
490 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
491 | DBG3("Creating relayd data socket from URI"); | |
492 | } else { | |
493 | /* Command is not valid */ | |
494 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 495 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
496 | goto close_sock; |
497 | } | |
498 | ||
499 | *relayd_sock = sock; | |
500 | ||
f73fabfd | 501 | return LTTNG_OK; |
2f77fc4b DG |
502 | |
503 | close_sock: | |
504 | if (sock) { | |
505 | (void) relayd_close(sock); | |
506 | } | |
507 | free_sock: | |
508 | if (sock) { | |
509 | lttcomm_destroy_sock(sock); | |
510 | } | |
511 | error: | |
512 | return ret; | |
513 | } | |
514 | ||
515 | /* | |
516 | * Connect to the relayd using URI and send the socket to the right consumer. | |
517 | */ | |
518 | static int send_consumer_relayd_socket(int domain, struct ltt_session *session, | |
519 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
520 | int consumer_fd) | |
521 | { | |
522 | int ret; | |
523 | struct lttcomm_sock *sock = NULL; | |
524 | ||
525 | /* Set the network sequence index if not set. */ | |
526 | if (consumer->net_seq_index == -1) { | |
527 | /* | |
528 | * Increment net_seq_idx because we are about to transfer the | |
529 | * new relayd socket to the consumer. | |
530 | */ | |
531 | uatomic_inc(&relayd_net_seq_idx); | |
532 | /* Assign unique key so the consumer can match streams */ | |
533 | uatomic_set(&consumer->net_seq_index, | |
534 | uatomic_read(&relayd_net_seq_idx)); | |
535 | } | |
536 | ||
537 | /* Connect to relayd and make version check if uri is the control. */ | |
538 | ret = create_connect_relayd(consumer, session->name, relayd_uri, &sock); | |
f73fabfd | 539 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
540 | goto close_sock; |
541 | } | |
542 | ||
543 | /* If the control socket is connected, network session is ready */ | |
544 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
545 | session->net_handle = 1; | |
546 | } | |
547 | ||
548 | /* Send relayd socket to consumer. */ | |
549 | ret = consumer_send_relayd_socket(consumer_fd, sock, | |
550 | consumer, relayd_uri->stype); | |
551 | if (ret < 0) { | |
f73fabfd | 552 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
553 | goto close_sock; |
554 | } | |
555 | ||
f73fabfd | 556 | ret = LTTNG_OK; |
2f77fc4b DG |
557 | |
558 | /* | |
559 | * Close socket which was dup on the consumer side. The session daemon does | |
560 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
561 | */ | |
562 | ||
563 | close_sock: | |
564 | if (sock) { | |
565 | (void) relayd_close(sock); | |
566 | lttcomm_destroy_sock(sock); | |
567 | } | |
568 | ||
569 | return ret; | |
570 | } | |
571 | ||
572 | /* | |
573 | * Send both relayd sockets to a specific consumer and domain. This is a | |
574 | * helper function to facilitate sending the information to the consumer for a | |
575 | * session. | |
576 | */ | |
577 | static int send_consumer_relayd_sockets(int domain, | |
578 | struct ltt_session *session, struct consumer_output *consumer, int fd) | |
579 | { | |
580 | int ret; | |
581 | ||
582 | assert(session); | |
583 | assert(consumer); | |
584 | ||
585 | /* Don't resend the sockets to the consumer. */ | |
586 | if (consumer->dst.net.relayd_socks_sent) { | |
f73fabfd | 587 | ret = LTTNG_OK; |
2f77fc4b DG |
588 | goto error; |
589 | } | |
590 | ||
591 | /* Sending control relayd socket. */ | |
592 | ret = send_consumer_relayd_socket(domain, session, | |
593 | &consumer->dst.net.control, consumer, fd); | |
f73fabfd | 594 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
595 | goto error; |
596 | } | |
597 | ||
598 | /* Sending data relayd socket. */ | |
599 | ret = send_consumer_relayd_socket(domain, session, | |
600 | &consumer->dst.net.data, consumer, fd); | |
f73fabfd | 601 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
602 | goto error; |
603 | } | |
604 | ||
605 | /* Flag that all relayd sockets were sent to the consumer. */ | |
606 | consumer->dst.net.relayd_socks_sent = 1; | |
607 | ||
608 | error: | |
609 | return ret; | |
610 | } | |
611 | ||
612 | /* | |
613 | * Setup relayd connections for a tracing session. First creates the socket to | |
614 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
615 | * network. | |
616 | */ | |
617 | static int setup_relayd(struct ltt_session *session) | |
618 | { | |
f73fabfd | 619 | int ret = LTTNG_OK; |
2f77fc4b DG |
620 | struct ltt_ust_session *usess; |
621 | struct ltt_kernel_session *ksess; | |
622 | struct consumer_socket *socket; | |
623 | struct lttng_ht_iter iter; | |
624 | ||
625 | assert(session); | |
626 | ||
627 | usess = session->ust_session; | |
628 | ksess = session->kernel_session; | |
629 | ||
630 | DBG2("Setting relayd for session %s", session->name); | |
631 | ||
632 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET | |
633 | && usess->consumer->enabled) { | |
634 | /* For each consumer socket, send relayd sockets */ | |
635 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
636 | socket, node.node) { | |
637 | /* Code flow error */ | |
638 | assert(socket->fd >= 0); | |
639 | ||
640 | pthread_mutex_lock(socket->lock); | |
641 | send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session, | |
642 | usess->consumer, socket->fd); | |
643 | pthread_mutex_unlock(socket->lock); | |
f73fabfd | 644 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
645 | goto error; |
646 | } | |
647 | } | |
648 | } | |
649 | ||
650 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
651 | && ksess->consumer->enabled) { | |
652 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
653 | socket, node.node) { | |
654 | /* Code flow error */ | |
655 | assert(socket->fd >= 0); | |
656 | ||
657 | pthread_mutex_lock(socket->lock); | |
658 | send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session, | |
659 | ksess->consumer, socket->fd); | |
660 | pthread_mutex_unlock(socket->lock); | |
f73fabfd | 661 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
662 | goto error; |
663 | } | |
664 | } | |
665 | } | |
666 | ||
667 | error: | |
668 | return ret; | |
669 | } | |
670 | ||
671 | /* | |
672 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
673 | */ | |
674 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
675 | char *channel_name) | |
676 | { | |
677 | int ret; | |
678 | struct ltt_ust_session *usess; | |
679 | ||
680 | usess = session->ust_session; | |
681 | ||
682 | switch (domain) { | |
683 | case LTTNG_DOMAIN_KERNEL: | |
684 | { | |
685 | ret = channel_kernel_disable(session->kernel_session, | |
686 | channel_name); | |
f73fabfd | 687 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
688 | goto error; |
689 | } | |
690 | ||
691 | kernel_wait_quiescent(kernel_tracer_fd); | |
692 | break; | |
693 | } | |
694 | case LTTNG_DOMAIN_UST: | |
695 | { | |
696 | struct ltt_ust_channel *uchan; | |
697 | struct lttng_ht *chan_ht; | |
698 | ||
699 | chan_ht = usess->domain_global.channels; | |
700 | ||
701 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
702 | if (uchan == NULL) { | |
f73fabfd | 703 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
704 | goto error; |
705 | } | |
706 | ||
707 | ret = channel_ust_disable(usess, domain, uchan); | |
f73fabfd | 708 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
709 | goto error; |
710 | } | |
711 | break; | |
712 | } | |
713 | #if 0 | |
714 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
715 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
716 | case LTTNG_DOMAIN_UST_PID: | |
717 | #endif | |
718 | default: | |
f73fabfd | 719 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
720 | goto error; |
721 | } | |
722 | ||
f73fabfd | 723 | ret = LTTNG_OK; |
2f77fc4b DG |
724 | |
725 | error: | |
726 | return ret; | |
727 | } | |
728 | ||
729 | /* | |
730 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
731 | * | |
732 | * The wpipe arguments is used as a notifier for the kernel thread. | |
733 | */ | |
734 | int cmd_enable_channel(struct ltt_session *session, | |
735 | int domain, struct lttng_channel *attr, int wpipe) | |
736 | { | |
737 | int ret; | |
738 | struct ltt_ust_session *usess = session->ust_session; | |
739 | struct lttng_ht *chan_ht; | |
740 | ||
741 | assert(session); | |
742 | assert(attr); | |
743 | ||
744 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
745 | ||
746 | switch (domain) { | |
747 | case LTTNG_DOMAIN_KERNEL: | |
748 | { | |
749 | struct ltt_kernel_channel *kchan; | |
750 | ||
751 | /* Mandatory for a kernel channel. */ | |
752 | assert(wpipe > 0); | |
753 | ||
754 | kchan = trace_kernel_get_channel_by_name(attr->name, | |
755 | session->kernel_session); | |
756 | if (kchan == NULL) { | |
757 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
758 | } else { | |
759 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
760 | } | |
761 | ||
f73fabfd | 762 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
763 | goto error; |
764 | } | |
765 | ||
766 | kernel_wait_quiescent(kernel_tracer_fd); | |
767 | break; | |
768 | } | |
769 | case LTTNG_DOMAIN_UST: | |
770 | { | |
771 | struct ltt_ust_channel *uchan; | |
772 | ||
773 | chan_ht = usess->domain_global.channels; | |
774 | ||
775 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
776 | if (uchan == NULL) { | |
777 | ret = channel_ust_create(usess, domain, attr); | |
778 | } else { | |
779 | ret = channel_ust_enable(usess, domain, uchan); | |
780 | } | |
781 | break; | |
782 | } | |
783 | #if 0 | |
784 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
785 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
786 | case LTTNG_DOMAIN_UST_PID: | |
787 | #endif | |
788 | default: | |
f73fabfd | 789 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
790 | goto error; |
791 | } | |
792 | ||
793 | error: | |
794 | return ret; | |
795 | } | |
796 | ||
797 | ||
798 | /* | |
799 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
800 | */ | |
801 | int cmd_disable_event(struct ltt_session *session, int domain, | |
802 | char *channel_name, char *event_name) | |
803 | { | |
804 | int ret; | |
805 | ||
806 | switch (domain) { | |
807 | case LTTNG_DOMAIN_KERNEL: | |
808 | { | |
809 | struct ltt_kernel_channel *kchan; | |
810 | struct ltt_kernel_session *ksess; | |
811 | ||
812 | ksess = session->kernel_session; | |
813 | ||
814 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
815 | if (kchan == NULL) { | |
f73fabfd | 816 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
817 | goto error; |
818 | } | |
819 | ||
820 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); | |
f73fabfd | 821 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
822 | goto error; |
823 | } | |
824 | ||
825 | kernel_wait_quiescent(kernel_tracer_fd); | |
826 | break; | |
827 | } | |
828 | case LTTNG_DOMAIN_UST: | |
829 | { | |
830 | struct ltt_ust_channel *uchan; | |
831 | struct ltt_ust_session *usess; | |
832 | ||
833 | usess = session->ust_session; | |
834 | ||
835 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
836 | channel_name); | |
837 | if (uchan == NULL) { | |
f73fabfd | 838 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
839 | goto error; |
840 | } | |
841 | ||
842 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); | |
f73fabfd | 843 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
844 | goto error; |
845 | } | |
846 | ||
847 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
848 | channel_name); | |
849 | break; | |
850 | } | |
851 | #if 0 | |
852 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
853 | case LTTNG_DOMAIN_UST_PID: | |
854 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
855 | #endif | |
856 | default: | |
f73fabfd | 857 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
858 | goto error; |
859 | } | |
860 | ||
f73fabfd | 861 | ret = LTTNG_OK; |
2f77fc4b DG |
862 | |
863 | error: | |
864 | return ret; | |
865 | } | |
866 | ||
867 | /* | |
868 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
869 | */ | |
870 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
871 | char *channel_name) | |
872 | { | |
873 | int ret; | |
874 | ||
875 | switch (domain) { | |
876 | case LTTNG_DOMAIN_KERNEL: | |
877 | { | |
878 | struct ltt_kernel_session *ksess; | |
879 | struct ltt_kernel_channel *kchan; | |
880 | ||
881 | ksess = session->kernel_session; | |
882 | ||
883 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
884 | if (kchan == NULL) { | |
f73fabfd | 885 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
886 | goto error; |
887 | } | |
888 | ||
889 | ret = event_kernel_disable_all(ksess, kchan); | |
f73fabfd | 890 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
891 | goto error; |
892 | } | |
893 | ||
894 | kernel_wait_quiescent(kernel_tracer_fd); | |
895 | break; | |
896 | } | |
897 | case LTTNG_DOMAIN_UST: | |
898 | { | |
899 | struct ltt_ust_session *usess; | |
900 | struct ltt_ust_channel *uchan; | |
901 | ||
902 | usess = session->ust_session; | |
903 | ||
904 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
905 | channel_name); | |
906 | if (uchan == NULL) { | |
f73fabfd | 907 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
908 | goto error; |
909 | } | |
910 | ||
911 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); | |
912 | if (ret != 0) { | |
913 | goto error; | |
914 | } | |
915 | ||
916 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
917 | ||
918 | break; | |
919 | } | |
920 | #if 0 | |
921 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
922 | case LTTNG_DOMAIN_UST_PID: | |
923 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
924 | #endif | |
925 | default: | |
f73fabfd | 926 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
927 | goto error; |
928 | } | |
929 | ||
f73fabfd | 930 | ret = LTTNG_OK; |
2f77fc4b DG |
931 | |
932 | error: | |
933 | return ret; | |
934 | } | |
935 | ||
936 | /* | |
937 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
938 | */ | |
939 | int cmd_add_context(struct ltt_session *session, int domain, | |
940 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
941 | { | |
942 | int ret; | |
943 | ||
944 | switch (domain) { | |
945 | case LTTNG_DOMAIN_KERNEL: | |
946 | /* Add kernel context to kernel tracer */ | |
947 | ret = context_kernel_add(session->kernel_session, ctx, | |
948 | event_name, channel_name); | |
f73fabfd | 949 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
950 | goto error; |
951 | } | |
952 | break; | |
953 | case LTTNG_DOMAIN_UST: | |
954 | { | |
955 | struct ltt_ust_session *usess = session->ust_session; | |
956 | ||
957 | assert(usess); | |
958 | ||
959 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); | |
f73fabfd | 960 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
961 | goto error; |
962 | } | |
963 | break; | |
964 | } | |
965 | #if 0 | |
966 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
967 | case LTTNG_DOMAIN_UST_PID: | |
968 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
969 | #endif | |
970 | default: | |
f73fabfd | 971 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
972 | goto error; |
973 | } | |
974 | ||
f73fabfd | 975 | ret = LTTNG_OK; |
2f77fc4b DG |
976 | |
977 | error: | |
978 | return ret; | |
979 | } | |
980 | ||
981 | /* | |
982 | * Command LTTNG_SET_FILTER processed by the client thread. | |
983 | */ | |
984 | int cmd_set_filter(struct ltt_session *session, int domain, | |
985 | char *channel_name, char *event_name, | |
986 | struct lttng_filter_bytecode *bytecode) | |
987 | { | |
988 | int ret; | |
989 | ||
990 | switch (domain) { | |
991 | case LTTNG_DOMAIN_KERNEL: | |
f73fabfd | 992 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
993 | break; |
994 | case LTTNG_DOMAIN_UST: | |
995 | { | |
996 | struct ltt_ust_session *usess = session->ust_session; | |
997 | ||
998 | ret = filter_ust_set(usess, domain, bytecode, event_name, channel_name); | |
f73fabfd | 999 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1000 | goto error; |
1001 | } | |
1002 | break; | |
1003 | } | |
1004 | #if 0 | |
1005 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1006 | case LTTNG_DOMAIN_UST_PID: | |
1007 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1008 | #endif | |
1009 | default: | |
f73fabfd | 1010 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1011 | goto error; |
1012 | } | |
1013 | ||
f73fabfd | 1014 | ret = LTTNG_OK; |
2f77fc4b DG |
1015 | |
1016 | error: | |
1017 | return ret; | |
1018 | ||
1019 | } | |
1020 | ||
1021 | ||
1022 | /* | |
1023 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1024 | */ | |
1025 | int cmd_enable_event(struct ltt_session *session, int domain, | |
1026 | char *channel_name, struct lttng_event *event, int wpipe) | |
1027 | { | |
1028 | int ret; | |
1029 | struct lttng_channel *attr; | |
1030 | ||
1031 | assert(session); | |
1032 | assert(event); | |
1033 | assert(channel_name); | |
1034 | ||
1035 | switch (domain) { | |
1036 | case LTTNG_DOMAIN_KERNEL: | |
1037 | { | |
1038 | struct ltt_kernel_channel *kchan; | |
1039 | ||
1040 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1041 | session->kernel_session); | |
1042 | if (kchan == NULL) { | |
1043 | attr = channel_new_default_attr(domain); | |
1044 | if (attr == NULL) { | |
f73fabfd | 1045 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1046 | goto error; |
1047 | } | |
1048 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1049 | ||
1050 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1051 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1052 | free(attr); |
1053 | goto error; | |
1054 | } | |
1055 | free(attr); | |
1056 | } | |
1057 | ||
1058 | /* Get the newly created kernel channel pointer */ | |
1059 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1060 | session->kernel_session); | |
1061 | if (kchan == NULL) { | |
1062 | /* This sould not happen... */ | |
f73fabfd | 1063 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1064 | goto error; |
1065 | } | |
1066 | ||
1067 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, | |
1068 | event); | |
f73fabfd | 1069 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1070 | goto error; |
1071 | } | |
1072 | ||
1073 | kernel_wait_quiescent(kernel_tracer_fd); | |
1074 | break; | |
1075 | } | |
1076 | case LTTNG_DOMAIN_UST: | |
1077 | { | |
1078 | struct ltt_ust_channel *uchan; | |
1079 | struct ltt_ust_session *usess = session->ust_session; | |
1080 | ||
1081 | assert(usess); | |
1082 | ||
1083 | /* Get channel from global UST domain */ | |
1084 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1085 | channel_name); | |
1086 | if (uchan == NULL) { | |
1087 | /* Create default channel */ | |
1088 | attr = channel_new_default_attr(domain); | |
1089 | if (attr == NULL) { | |
f73fabfd | 1090 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1091 | goto error; |
1092 | } | |
1093 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1094 | ||
1095 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1096 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1097 | free(attr); |
1098 | goto error; | |
1099 | } | |
1100 | free(attr); | |
1101 | ||
1102 | /* Get the newly created channel reference back */ | |
1103 | uchan = trace_ust_find_channel_by_name( | |
1104 | usess->domain_global.channels, channel_name); | |
1105 | assert(uchan); | |
1106 | } | |
1107 | ||
1108 | /* At this point, the session and channel exist on the tracer */ | |
1109 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); | |
f73fabfd | 1110 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1111 | goto error; |
1112 | } | |
1113 | break; | |
1114 | } | |
1115 | #if 0 | |
1116 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1117 | case LTTNG_DOMAIN_UST_PID: | |
1118 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1119 | #endif | |
1120 | default: | |
f73fabfd | 1121 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1122 | goto error; |
1123 | } | |
1124 | ||
f73fabfd | 1125 | ret = LTTNG_OK; |
2f77fc4b DG |
1126 | |
1127 | error: | |
1128 | return ret; | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1133 | */ | |
1134 | int cmd_enable_event_all(struct ltt_session *session, int domain, | |
1135 | char *channel_name, int event_type, int wpipe) | |
1136 | { | |
1137 | int ret; | |
1138 | struct lttng_channel *attr; | |
1139 | ||
1140 | assert(session); | |
1141 | assert(channel_name); | |
1142 | ||
1143 | switch (domain) { | |
1144 | case LTTNG_DOMAIN_KERNEL: | |
1145 | { | |
1146 | struct ltt_kernel_channel *kchan; | |
1147 | ||
1148 | assert(session->kernel_session); | |
1149 | ||
1150 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1151 | session->kernel_session); | |
1152 | if (kchan == NULL) { | |
1153 | /* Create default channel */ | |
1154 | attr = channel_new_default_attr(domain); | |
1155 | if (attr == NULL) { | |
f73fabfd | 1156 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1157 | goto error; |
1158 | } | |
1159 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1160 | ||
1161 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1162 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1163 | free(attr); |
1164 | goto error; | |
1165 | } | |
1166 | free(attr); | |
1167 | ||
1168 | /* Get the newly created kernel channel pointer */ | |
1169 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1170 | session->kernel_session); | |
1171 | assert(kchan); | |
1172 | } | |
1173 | ||
1174 | switch (event_type) { | |
1175 | case LTTNG_EVENT_SYSCALL: | |
1176 | ret = event_kernel_enable_all_syscalls(session->kernel_session, | |
1177 | kchan, kernel_tracer_fd); | |
1178 | break; | |
1179 | case LTTNG_EVENT_TRACEPOINT: | |
1180 | /* | |
1181 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1182 | * events already registered to the channel. | |
1183 | */ | |
1184 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, | |
1185 | kchan, kernel_tracer_fd); | |
1186 | break; | |
1187 | case LTTNG_EVENT_ALL: | |
1188 | /* Enable syscalls and tracepoints */ | |
1189 | ret = event_kernel_enable_all(session->kernel_session, | |
1190 | kchan, kernel_tracer_fd); | |
1191 | break; | |
1192 | default: | |
f73fabfd | 1193 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1194 | goto error; |
1195 | } | |
1196 | ||
1197 | /* Manage return value */ | |
f73fabfd | 1198 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1199 | goto error; |
1200 | } | |
1201 | ||
1202 | kernel_wait_quiescent(kernel_tracer_fd); | |
1203 | break; | |
1204 | } | |
1205 | case LTTNG_DOMAIN_UST: | |
1206 | { | |
1207 | struct ltt_ust_channel *uchan; | |
1208 | struct ltt_ust_session *usess = session->ust_session; | |
1209 | ||
1210 | assert(usess); | |
1211 | ||
1212 | /* Get channel from global UST domain */ | |
1213 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1214 | channel_name); | |
1215 | if (uchan == NULL) { | |
1216 | /* Create default channel */ | |
1217 | attr = channel_new_default_attr(domain); | |
1218 | if (attr == NULL) { | |
f73fabfd | 1219 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1220 | goto error; |
1221 | } | |
1222 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1223 | ||
1224 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1225 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1226 | free(attr); |
1227 | goto error; | |
1228 | } | |
1229 | free(attr); | |
1230 | ||
1231 | /* Get the newly created channel reference back */ | |
1232 | uchan = trace_ust_find_channel_by_name( | |
1233 | usess->domain_global.channels, channel_name); | |
1234 | assert(uchan); | |
1235 | } | |
1236 | ||
1237 | /* At this point, the session and channel exist on the tracer */ | |
1238 | ||
1239 | switch (event_type) { | |
1240 | case LTTNG_EVENT_ALL: | |
1241 | case LTTNG_EVENT_TRACEPOINT: | |
1242 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
f73fabfd | 1243 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1244 | goto error; |
1245 | } | |
1246 | break; | |
1247 | default: | |
f73fabfd | 1248 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1249 | goto error; |
1250 | } | |
1251 | ||
1252 | /* Manage return value */ | |
f73fabfd | 1253 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1254 | goto error; |
1255 | } | |
1256 | ||
1257 | break; | |
1258 | } | |
1259 | #if 0 | |
1260 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1261 | case LTTNG_DOMAIN_UST_PID: | |
1262 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1263 | #endif | |
1264 | default: | |
f73fabfd | 1265 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1266 | goto error; |
1267 | } | |
1268 | ||
f73fabfd | 1269 | ret = LTTNG_OK; |
2f77fc4b DG |
1270 | |
1271 | error: | |
1272 | return ret; | |
1273 | } | |
1274 | ||
1275 | ||
1276 | /* | |
1277 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1278 | */ | |
1279 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1280 | { | |
1281 | int ret; | |
1282 | ssize_t nb_events = 0; | |
1283 | ||
1284 | switch (domain) { | |
1285 | case LTTNG_DOMAIN_KERNEL: | |
1286 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1287 | if (nb_events < 0) { | |
f73fabfd | 1288 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1289 | goto error; |
1290 | } | |
1291 | break; | |
1292 | case LTTNG_DOMAIN_UST: | |
1293 | nb_events = ust_app_list_events(events); | |
1294 | if (nb_events < 0) { | |
f73fabfd | 1295 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1296 | goto error; |
1297 | } | |
1298 | break; | |
1299 | default: | |
f73fabfd | 1300 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1301 | goto error; |
1302 | } | |
1303 | ||
1304 | return nb_events; | |
1305 | ||
1306 | error: | |
1307 | /* Return negative value to differentiate return code */ | |
1308 | return -ret; | |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1313 | */ | |
1314 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1315 | struct lttng_event_field **fields) | |
1316 | { | |
1317 | int ret; | |
1318 | ssize_t nb_fields = 0; | |
1319 | ||
1320 | switch (domain) { | |
1321 | case LTTNG_DOMAIN_UST: | |
1322 | nb_fields = ust_app_list_event_fields(fields); | |
1323 | if (nb_fields < 0) { | |
f73fabfd | 1324 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1325 | goto error; |
1326 | } | |
1327 | break; | |
1328 | case LTTNG_DOMAIN_KERNEL: | |
1329 | default: /* fall-through */ | |
f73fabfd | 1330 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1331 | goto error; |
1332 | } | |
1333 | ||
1334 | return nb_fields; | |
1335 | ||
1336 | error: | |
1337 | /* Return negative value to differentiate return code */ | |
1338 | return -ret; | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * Command LTTNG_START_TRACE processed by the client thread. | |
1343 | */ | |
1344 | int cmd_start_trace(struct ltt_session *session) | |
1345 | { | |
1346 | int ret; | |
1347 | struct ltt_kernel_session *ksession; | |
1348 | struct ltt_ust_session *usess; | |
1349 | struct ltt_kernel_channel *kchan; | |
1350 | ||
1351 | assert(session); | |
1352 | ||
1353 | /* Ease our life a bit ;) */ | |
1354 | ksession = session->kernel_session; | |
1355 | usess = session->ust_session; | |
1356 | ||
1357 | if (session->enabled) { | |
1358 | /* Already started. */ | |
f73fabfd | 1359 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1360 | goto error; |
1361 | } | |
1362 | ||
1363 | session->enabled = 1; | |
1364 | ||
1365 | ret = setup_relayd(session); | |
f73fabfd | 1366 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1367 | ERR("Error setting up relayd for session %s", session->name); |
1368 | goto error; | |
1369 | } | |
1370 | ||
1371 | /* Kernel tracing */ | |
1372 | if (ksession != NULL) { | |
1373 | /* Open kernel metadata */ | |
1374 | if (ksession->metadata == NULL) { | |
1375 | ret = kernel_open_metadata(ksession); | |
1376 | if (ret < 0) { | |
f73fabfd | 1377 | ret = LTTNG_ERR_KERN_META_FAIL; |
2f77fc4b DG |
1378 | goto error; |
1379 | } | |
1380 | } | |
1381 | ||
1382 | /* Open kernel metadata stream */ | |
1383 | if (ksession->metadata_stream_fd < 0) { | |
1384 | ret = kernel_open_metadata_stream(ksession); | |
1385 | if (ret < 0) { | |
1386 | ERR("Kernel create metadata stream failed"); | |
f73fabfd | 1387 | ret = LTTNG_ERR_KERN_STREAM_FAIL; |
2f77fc4b DG |
1388 | goto error; |
1389 | } | |
1390 | } | |
1391 | ||
1392 | /* For each channel */ | |
1393 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1394 | if (kchan->stream_count == 0) { | |
1395 | ret = kernel_open_channel_stream(kchan); | |
1396 | if (ret < 0) { | |
f73fabfd | 1397 | ret = LTTNG_ERR_KERN_STREAM_FAIL; |
2f77fc4b DG |
1398 | goto error; |
1399 | } | |
1400 | /* Update the stream global counter */ | |
1401 | ksession->stream_count_global += ret; | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | /* Setup kernel consumer socket and send fds to it */ | |
1406 | ret = init_kernel_tracing(ksession); | |
1407 | if (ret < 0) { | |
f73fabfd | 1408 | ret = LTTNG_ERR_KERN_START_FAIL; |
2f77fc4b DG |
1409 | goto error; |
1410 | } | |
1411 | ||
1412 | /* This start the kernel tracing */ | |
1413 | ret = kernel_start_session(ksession); | |
1414 | if (ret < 0) { | |
f73fabfd | 1415 | ret = LTTNG_ERR_KERN_START_FAIL; |
2f77fc4b DG |
1416 | goto error; |
1417 | } | |
1418 | ||
1419 | /* Quiescent wait after starting trace */ | |
1420 | kernel_wait_quiescent(kernel_tracer_fd); | |
1421 | } | |
1422 | ||
1423 | /* Flag session that trace should start automatically */ | |
1424 | if (usess) { | |
1425 | usess->start_trace = 1; | |
1426 | ||
1427 | ret = ust_app_start_trace_all(usess); | |
1428 | if (ret < 0) { | |
f73fabfd | 1429 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1430 | goto error; |
1431 | } | |
1432 | } | |
1433 | ||
f73fabfd | 1434 | ret = LTTNG_OK; |
2f77fc4b DG |
1435 | |
1436 | error: | |
1437 | return ret; | |
1438 | } | |
1439 | ||
1440 | /* | |
1441 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1442 | */ | |
1443 | int cmd_stop_trace(struct ltt_session *session) | |
1444 | { | |
1445 | int ret; | |
1446 | struct ltt_kernel_channel *kchan; | |
1447 | struct ltt_kernel_session *ksession; | |
1448 | struct ltt_ust_session *usess; | |
1449 | ||
1450 | assert(session); | |
1451 | ||
1452 | /* Short cut */ | |
1453 | ksession = session->kernel_session; | |
1454 | usess = session->ust_session; | |
1455 | ||
1456 | if (!session->enabled) { | |
f73fabfd | 1457 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1458 | goto error; |
1459 | } | |
1460 | ||
1461 | session->enabled = 0; | |
1462 | ||
1463 | /* Kernel tracer */ | |
1464 | if (ksession) { | |
1465 | DBG("Stop kernel tracing"); | |
1466 | ||
1467 | /* Flush metadata if exist */ | |
1468 | if (ksession->metadata_stream_fd >= 0) { | |
1469 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1470 | if (ret < 0) { | |
1471 | ERR("Kernel metadata flush failed"); | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | /* Flush all buffers before stopping */ | |
1476 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1477 | ret = kernel_flush_buffer(kchan); | |
1478 | if (ret < 0) { | |
1479 | ERR("Kernel flush buffer error"); | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | ret = kernel_stop_session(ksession); | |
1484 | if (ret < 0) { | |
f73fabfd | 1485 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1486 | goto error; |
1487 | } | |
1488 | ||
1489 | kernel_wait_quiescent(kernel_tracer_fd); | |
1490 | } | |
1491 | ||
1492 | if (usess) { | |
1493 | usess->start_trace = 0; | |
1494 | ||
1495 | ret = ust_app_stop_trace_all(usess); | |
1496 | if (ret < 0) { | |
f73fabfd | 1497 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1498 | goto error; |
1499 | } | |
1500 | } | |
1501 | ||
f73fabfd | 1502 | ret = LTTNG_OK; |
2f77fc4b DG |
1503 | |
1504 | error: | |
1505 | return ret; | |
1506 | } | |
1507 | ||
1508 | /* | |
1509 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1510 | */ | |
1511 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1512 | size_t nb_uri, struct lttng_uri *uris) | |
1513 | { | |
1514 | int ret, i; | |
1515 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1516 | struct ltt_ust_session *usess = session->ust_session; | |
1517 | struct consumer_output *consumer = NULL; | |
1518 | ||
1519 | assert(session); | |
1520 | assert(uris); | |
1521 | assert(nb_uri > 0); | |
1522 | ||
1523 | /* Can't enable consumer after session started. */ | |
1524 | if (session->enabled) { | |
f73fabfd | 1525 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1526 | goto error; |
1527 | } | |
1528 | ||
1529 | if (!session->start_consumer) { | |
f73fabfd | 1530 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
1531 | goto error; |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | * This case switch makes sure the domain session has a temporary consumer | |
1536 | * so the URL can be set. | |
1537 | */ | |
1538 | switch (domain) { | |
1539 | case 0: | |
1540 | /* Code flow error. A session MUST always have a consumer object */ | |
1541 | assert(session->consumer); | |
1542 | /* | |
1543 | * The URL will be added to the tracing session consumer instead of a | |
1544 | * specific domain consumer. | |
1545 | */ | |
1546 | consumer = session->consumer; | |
1547 | break; | |
1548 | case LTTNG_DOMAIN_KERNEL: | |
1549 | /* Code flow error if we don't have a kernel session here. */ | |
1550 | assert(ksess); | |
1551 | ||
1552 | /* Create consumer output if none exists */ | |
1553 | consumer = ksess->tmp_consumer; | |
1554 | if (consumer == NULL) { | |
1555 | consumer = consumer_copy_output(ksess->consumer); | |
1556 | if (consumer == NULL) { | |
f73fabfd | 1557 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1558 | goto error; |
1559 | } | |
1560 | /* Trash the consumer subdir, we are about to set a new one. */ | |
1561 | memset(consumer->subdir, 0, sizeof(consumer->subdir)); | |
1562 | ksess->tmp_consumer = consumer; | |
1563 | } | |
1564 | ||
1565 | break; | |
1566 | case LTTNG_DOMAIN_UST: | |
1567 | /* Code flow error if we don't have a kernel session here. */ | |
1568 | assert(usess); | |
1569 | ||
1570 | /* Create consumer output if none exists */ | |
1571 | consumer = usess->tmp_consumer; | |
1572 | if (consumer == NULL) { | |
1573 | consumer = consumer_copy_output(usess->consumer); | |
1574 | if (consumer == NULL) { | |
f73fabfd | 1575 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1576 | goto error; |
1577 | } | |
1578 | /* Trash the consumer subdir, we are about to set a new one. */ | |
1579 | memset(consumer->subdir, 0, sizeof(consumer->subdir)); | |
1580 | usess->tmp_consumer = consumer; | |
1581 | } | |
1582 | ||
1583 | break; | |
1584 | } | |
1585 | ||
1586 | for (i = 0; i < nb_uri; i++) { | |
1587 | struct consumer_socket *socket; | |
1588 | struct lttng_ht_iter iter; | |
1589 | ||
1590 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); | |
1591 | if (ret < 0) { | |
1592 | goto error; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * Don't send relayd socket if URI is NOT remote or if the relayd | |
1597 | * sockets for the session are already sent. | |
1598 | */ | |
1599 | if (uris[i].dtype == LTTNG_DST_PATH || | |
1600 | consumer->dst.net.relayd_socks_sent) { | |
1601 | continue; | |
1602 | } | |
1603 | ||
1604 | /* Try to send relayd URI to the consumer if exist. */ | |
1605 | rcu_read_lock(); | |
1606 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, | |
1607 | socket, node.node) { | |
1608 | ||
1609 | /* A socket in the HT should never have a negative fd */ | |
1610 | assert(socket->fd >= 0); | |
1611 | ||
1612 | pthread_mutex_lock(socket->lock); | |
1613 | ret = send_consumer_relayd_socket(domain, session, &uris[i], | |
1614 | consumer, socket->fd); | |
1615 | pthread_mutex_unlock(socket->lock); | |
f73fabfd | 1616 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1617 | rcu_read_unlock(); |
1618 | goto error; | |
1619 | } | |
1620 | } | |
1621 | rcu_read_unlock(); | |
1622 | } | |
1623 | ||
1624 | /* All good! */ | |
f73fabfd | 1625 | ret = LTTNG_OK; |
2f77fc4b DG |
1626 | |
1627 | error: | |
1628 | return ret; | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1633 | */ | |
1634 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
1635 | size_t nb_uri, lttng_sock_cred *creds) | |
1636 | { | |
1637 | int ret; | |
1638 | char *path = NULL; | |
1639 | struct ltt_session *session; | |
1640 | ||
1641 | assert(name); | |
1642 | ||
1643 | /* | |
1644 | * Verify if the session already exist | |
1645 | * | |
1646 | * XXX: There is no need for the session lock list here since the caller | |
1647 | * (process_client_msg) is holding it. We might want to change that so a | |
1648 | * single command does not lock the entire session list. | |
1649 | */ | |
1650 | session = session_find_by_name(name); | |
1651 | if (session != NULL) { | |
f73fabfd | 1652 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1653 | goto find_error; |
1654 | } | |
1655 | ||
1656 | /* Create tracing session in the registry */ | |
1657 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), | |
1658 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
f73fabfd | 1659 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1660 | goto session_error; |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * Get the newly created session pointer back | |
1665 | * | |
1666 | * XXX: There is no need for the session lock list here since the caller | |
1667 | * (process_client_msg) is holding it. We might want to change that so a | |
1668 | * single command does not lock the entire session list. | |
1669 | */ | |
1670 | session = session_find_by_name(name); | |
1671 | assert(session); | |
1672 | ||
1673 | /* Create default consumer output for the session not yet created. */ | |
1674 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1675 | if (session->consumer == NULL) { | |
f73fabfd | 1676 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1677 | goto consumer_error; |
1678 | } | |
1679 | ||
1680 | /* | |
1681 | * This means that the lttng_create_session call was called with the _path_ | |
1682 | * argument set to NULL. | |
1683 | */ | |
1684 | if (uris == NULL) { | |
1685 | /* | |
1686 | * At this point, we'll skip the consumer URI setup and create a | |
1687 | * session with a NULL path which will flag the session to NOT spawn a | |
1688 | * consumer. | |
1689 | */ | |
1690 | DBG("Create session %s with NO uri, skipping consumer setup", name); | |
1691 | goto end; | |
1692 | } | |
1693 | ||
1694 | session->start_consumer = 1; | |
1695 | ||
1696 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
f73fabfd | 1697 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1698 | goto consumer_error; |
1699 | } | |
1700 | ||
1701 | session->consumer->enabled = 1; | |
1702 | ||
1703 | end: | |
f73fabfd | 1704 | return LTTNG_OK; |
2f77fc4b DG |
1705 | |
1706 | consumer_error: | |
1707 | session_destroy(session); | |
1708 | session_error: | |
1709 | find_error: | |
1710 | return ret; | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1715 | */ | |
1716 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1717 | { | |
1718 | int ret; | |
1719 | struct ltt_ust_session *usess; | |
1720 | struct ltt_kernel_session *ksess; | |
1721 | ||
1722 | /* Safety net */ | |
1723 | assert(session); | |
1724 | ||
1725 | usess = session->ust_session; | |
1726 | ksess = session->kernel_session; | |
1727 | ||
1728 | /* Clean kernel session teardown */ | |
1729 | kernel_destroy_session(ksess); | |
1730 | ||
1731 | /* UST session teardown */ | |
1732 | if (usess) { | |
1733 | /* Close any relayd session */ | |
1734 | consumer_output_send_destroy_relayd(usess->consumer); | |
1735 | ||
1736 | /* Destroy every UST application related to this session. */ | |
1737 | ret = ust_app_destroy_trace_all(usess); | |
1738 | if (ret) { | |
1739 | ERR("Error in ust_app_destroy_trace_all"); | |
1740 | } | |
1741 | ||
1742 | /* Clean up the rest. */ | |
1743 | trace_ust_destroy_session(usess); | |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * Must notify the kernel thread here to update it's poll set in order to | |
1748 | * remove the channel(s)' fd just destroyed. | |
1749 | */ | |
1750 | ret = notify_thread_pipe(wpipe); | |
1751 | if (ret < 0) { | |
1752 | PERROR("write kernel poll pipe"); | |
1753 | } | |
1754 | ||
1755 | ret = session_destroy(session); | |
1756 | ||
1757 | return ret; | |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1762 | */ | |
1763 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1764 | { | |
1765 | int ret; | |
1766 | ||
1767 | switch (domain) { | |
1768 | case LTTNG_DOMAIN_KERNEL: | |
1769 | { | |
1770 | struct lttng_kernel_calibrate kcalibrate; | |
1771 | ||
1772 | kcalibrate.type = calibrate->type; | |
1773 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1774 | if (ret < 0) { | |
f73fabfd | 1775 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1776 | goto error; |
1777 | } | |
1778 | break; | |
1779 | } | |
1780 | case LTTNG_DOMAIN_UST: | |
1781 | { | |
1782 | struct lttng_ust_calibrate ucalibrate; | |
1783 | ||
1784 | ucalibrate.type = calibrate->type; | |
1785 | ret = ust_app_calibrate_glb(&ucalibrate); | |
1786 | if (ret < 0) { | |
f73fabfd | 1787 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
1788 | goto error; |
1789 | } | |
1790 | break; | |
1791 | } | |
1792 | default: | |
f73fabfd | 1793 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1794 | goto error; |
1795 | } | |
1796 | ||
f73fabfd | 1797 | ret = LTTNG_OK; |
2f77fc4b DG |
1798 | |
1799 | error: | |
1800 | return ret; | |
1801 | } | |
1802 | ||
1803 | /* | |
1804 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
1805 | */ | |
1806 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
1807 | const char *sock_path, struct consumer_data *cdata) | |
1808 | { | |
1809 | int ret, sock; | |
1810 | struct consumer_socket *socket; | |
1811 | ||
1812 | assert(session); | |
1813 | assert(cdata); | |
1814 | assert(sock_path); | |
1815 | ||
1816 | switch (domain) { | |
1817 | case LTTNG_DOMAIN_KERNEL: | |
1818 | { | |
1819 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1820 | ||
1821 | assert(ksess); | |
1822 | ||
1823 | /* Can't register a consumer if there is already one */ | |
1824 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 1825 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
1826 | goto error; |
1827 | } | |
1828 | ||
1829 | sock = lttcomm_connect_unix_sock(sock_path); | |
1830 | if (sock < 0) { | |
f73fabfd | 1831 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
1832 | goto error; |
1833 | } | |
1834 | ||
1835 | socket = consumer_allocate_socket(sock); | |
1836 | if (socket == NULL) { | |
f73fabfd | 1837 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1838 | close(sock); |
1839 | goto error; | |
1840 | } | |
1841 | ||
1842 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
1843 | if (socket->lock == NULL) { | |
1844 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 1845 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1846 | goto error; |
1847 | } | |
1848 | pthread_mutex_init(socket->lock, NULL); | |
1849 | socket->registered = 1; | |
1850 | ||
1851 | rcu_read_lock(); | |
1852 | consumer_add_socket(socket, ksess->consumer); | |
1853 | rcu_read_unlock(); | |
1854 | ||
1855 | pthread_mutex_lock(&cdata->pid_mutex); | |
1856 | cdata->pid = -1; | |
1857 | pthread_mutex_unlock(&cdata->pid_mutex); | |
1858 | ||
1859 | break; | |
1860 | } | |
1861 | default: | |
1862 | /* TODO: Userspace tracing */ | |
f73fabfd | 1863 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1864 | goto error; |
1865 | } | |
1866 | ||
f73fabfd | 1867 | ret = LTTNG_OK; |
2f77fc4b DG |
1868 | |
1869 | error: | |
1870 | return ret; | |
1871 | } | |
1872 | ||
1873 | /* | |
1874 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
1875 | */ | |
1876 | ssize_t cmd_list_domains(struct ltt_session *session, | |
1877 | struct lttng_domain **domains) | |
1878 | { | |
1879 | int ret, index = 0; | |
1880 | ssize_t nb_dom = 0; | |
1881 | ||
1882 | if (session->kernel_session != NULL) { | |
1883 | DBG3("Listing domains found kernel domain"); | |
1884 | nb_dom++; | |
1885 | } | |
1886 | ||
1887 | if (session->ust_session != NULL) { | |
1888 | DBG3("Listing domains found UST global domain"); | |
1889 | nb_dom++; | |
1890 | } | |
1891 | ||
1892 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
1893 | if (*domains == NULL) { | |
f73fabfd | 1894 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1895 | goto error; |
1896 | } | |
1897 | ||
1898 | if (session->kernel_session != NULL) { | |
1899 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
1900 | index++; | |
1901 | } | |
1902 | ||
1903 | if (session->ust_session != NULL) { | |
1904 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
1905 | index++; | |
1906 | } | |
1907 | ||
1908 | return nb_dom; | |
1909 | ||
1910 | error: | |
f73fabfd DG |
1911 | /* Return negative value to differentiate return code */ |
1912 | return -ret; | |
2f77fc4b DG |
1913 | } |
1914 | ||
1915 | ||
1916 | /* | |
1917 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
1918 | */ | |
1919 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
1920 | struct lttng_channel **channels) | |
1921 | { | |
1922 | int ret; | |
1923 | ssize_t nb_chan = 0; | |
1924 | ||
1925 | switch (domain) { | |
1926 | case LTTNG_DOMAIN_KERNEL: | |
1927 | if (session->kernel_session != NULL) { | |
1928 | nb_chan = session->kernel_session->channel_count; | |
1929 | } | |
1930 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
1931 | if (nb_chan <= 0) { |
1932 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
1933 | } | |
2f77fc4b DG |
1934 | break; |
1935 | case LTTNG_DOMAIN_UST: | |
1936 | if (session->ust_session != NULL) { | |
1937 | nb_chan = lttng_ht_get_count( | |
1938 | session->ust_session->domain_global.channels); | |
1939 | } | |
1940 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
1941 | if (nb_chan <= 0) { |
1942 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1943 | } | |
2f77fc4b DG |
1944 | break; |
1945 | default: | |
1946 | *channels = NULL; | |
f73fabfd | 1947 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1948 | goto error; |
1949 | } | |
1950 | ||
1951 | if (nb_chan > 0) { | |
1952 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
1953 | if (*channels == NULL) { | |
f73fabfd | 1954 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1955 | goto error; |
1956 | } | |
1957 | ||
1958 | list_lttng_channels(domain, session, *channels); | |
1959 | } else { | |
1960 | *channels = NULL; | |
c7d620a2 DG |
1961 | /* Ret value was set in the domain switch case */ |
1962 | goto error; | |
2f77fc4b DG |
1963 | } |
1964 | ||
1965 | return nb_chan; | |
1966 | ||
1967 | error: | |
f73fabfd DG |
1968 | /* Return negative value to differentiate return code */ |
1969 | return -ret; | |
2f77fc4b DG |
1970 | } |
1971 | ||
1972 | /* | |
1973 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
1974 | */ | |
1975 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
1976 | char *channel_name, struct lttng_event **events) | |
1977 | { | |
1978 | int ret = 0; | |
1979 | ssize_t nb_event = 0; | |
1980 | ||
1981 | switch (domain) { | |
1982 | case LTTNG_DOMAIN_KERNEL: | |
1983 | if (session->kernel_session != NULL) { | |
1984 | nb_event = list_lttng_kernel_events(channel_name, | |
1985 | session->kernel_session, events); | |
1986 | } | |
1987 | break; | |
1988 | case LTTNG_DOMAIN_UST: | |
1989 | { | |
1990 | if (session->ust_session != NULL) { | |
1991 | nb_event = list_lttng_ust_global_events(channel_name, | |
1992 | &session->ust_session->domain_global, events); | |
1993 | } | |
1994 | break; | |
1995 | } | |
1996 | default: | |
f73fabfd | 1997 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1998 | goto error; |
1999 | } | |
2000 | ||
f73fabfd | 2001 | return nb_event; |
2f77fc4b DG |
2002 | |
2003 | error: | |
f73fabfd DG |
2004 | /* Return negative value to differentiate return code */ |
2005 | return -ret; | |
2f77fc4b DG |
2006 | } |
2007 | ||
2008 | /* | |
2009 | * Using the session list, filled a lttng_session array to send back to the | |
2010 | * client for session listing. | |
2011 | * | |
2012 | * The session list lock MUST be acquired before calling this function. Use | |
2013 | * session_lock_list() and session_unlock_list(). | |
2014 | */ | |
2015 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2016 | gid_t gid) | |
2017 | { | |
2018 | int ret; | |
2019 | unsigned int i = 0; | |
2020 | struct ltt_session *session; | |
2021 | struct ltt_session_list *list = session_get_list(); | |
2022 | ||
2023 | DBG("Getting all available session for UID %d GID %d", | |
2024 | uid, gid); | |
2025 | /* | |
2026 | * Iterate over session list and append data after the control struct in | |
2027 | * the buffer. | |
2028 | */ | |
2029 | cds_list_for_each_entry(session, &list->head, list) { | |
2030 | /* | |
2031 | * Only list the sessions the user can control. | |
2032 | */ | |
2033 | if (!session_access_ok(session, uid, gid)) { | |
2034 | continue; | |
2035 | } | |
2036 | ||
2037 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2038 | struct ltt_ust_session *usess = session->ust_session; | |
2039 | ||
2040 | if (session->consumer->type == CONSUMER_DST_NET || | |
2041 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2042 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2043 | ret = build_network_session_path(sessions[i].path, | |
2044 | sizeof(session[i].path), session); | |
2045 | } else { | |
2046 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2047 | session->consumer->dst.trace_path); | |
2048 | } | |
2049 | if (ret < 0) { | |
2050 | PERROR("snprintf session path"); | |
2051 | continue; | |
2052 | } | |
2053 | ||
2054 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2055 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2056 | sessions[i].enabled = session->enabled; | |
2057 | i++; | |
2058 | } | |
2059 | } | |
2060 | ||
2061 | /* | |
2062 | * Command LTTNG_DISABLE_CONSUMER processed by the client thread. | |
2063 | */ | |
2064 | int cmd_disable_consumer(int domain, struct ltt_session *session) | |
2065 | { | |
2066 | int ret; | |
2067 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2068 | struct ltt_ust_session *usess = session->ust_session; | |
2069 | struct consumer_output *consumer; | |
2070 | ||
2071 | assert(session); | |
2072 | ||
2073 | if (session->enabled) { | |
2074 | /* Can't disable consumer on an already started session */ | |
f73fabfd | 2075 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2076 | goto error; |
2077 | } | |
2078 | ||
2079 | if (!session->start_consumer) { | |
f73fabfd | 2080 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2081 | goto error; |
2082 | } | |
2083 | ||
2084 | switch (domain) { | |
2085 | case 0: | |
2086 | DBG("Disable tracing session %s consumer", session->name); | |
2087 | consumer = session->consumer; | |
2088 | break; | |
2089 | case LTTNG_DOMAIN_KERNEL: | |
2090 | /* Code flow error if we don't have a kernel session here. */ | |
2091 | assert(ksess); | |
2092 | ||
2093 | DBG("Disabling kernel consumer"); | |
2094 | consumer = ksess->consumer; | |
2095 | ||
2096 | break; | |
2097 | case LTTNG_DOMAIN_UST: | |
2098 | /* Code flow error if we don't have a UST session here. */ | |
2099 | assert(usess); | |
2100 | ||
2101 | DBG("Disabling UST consumer"); | |
2102 | consumer = usess->consumer; | |
2103 | ||
2104 | break; | |
2105 | default: | |
f73fabfd | 2106 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
2107 | goto error; |
2108 | } | |
2109 | ||
2110 | if (consumer) { | |
2111 | consumer->enabled = 0; | |
2112 | /* Success at this point */ | |
f73fabfd | 2113 | ret = LTTNG_OK; |
2f77fc4b | 2114 | } else { |
f73fabfd | 2115 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2116 | } |
2117 | ||
2118 | error: | |
2119 | return ret; | |
2120 | } | |
2121 | ||
2122 | /* | |
2123 | * Command LTTNG_ENABLE_CONSUMER processed by the client thread. | |
2124 | */ | |
2125 | int cmd_enable_consumer(int domain, struct ltt_session *session) | |
2126 | { | |
2127 | int ret; | |
2128 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2129 | struct ltt_ust_session *usess = session->ust_session; | |
2130 | struct consumer_output *consumer = NULL; | |
2131 | ||
2132 | assert(session); | |
2133 | ||
2134 | /* Can't enable consumer after session started. */ | |
2135 | if (session->enabled) { | |
f73fabfd | 2136 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2137 | goto error; |
2138 | } | |
2139 | ||
2140 | if (!session->start_consumer) { | |
f73fabfd | 2141 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2142 | goto error; |
2143 | } | |
2144 | ||
2145 | switch (domain) { | |
2146 | case 0: | |
2147 | assert(session->consumer); | |
2148 | consumer = session->consumer; | |
2149 | break; | |
2150 | case LTTNG_DOMAIN_KERNEL: | |
2151 | /* Code flow error if we don't have a kernel session here. */ | |
2152 | assert(ksess); | |
2153 | ||
2154 | /* | |
2155 | * Check if we have already sent fds to the consumer. In that case, | |
2156 | * the enable-consumer command can't be used because a start trace | |
2157 | * had previously occured. | |
2158 | */ | |
2159 | if (ksess->consumer_fds_sent) { | |
f73fabfd | 2160 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2161 | goto error; |
2162 | } | |
2163 | ||
2164 | consumer = ksess->tmp_consumer; | |
2165 | if (consumer == NULL) { | |
f73fabfd | 2166 | ret = LTTNG_OK; |
2f77fc4b DG |
2167 | /* No temp. consumer output exists. Using the current one. */ |
2168 | DBG3("No temporary consumer. Using default"); | |
2169 | consumer = ksess->consumer; | |
2170 | goto error; | |
2171 | } | |
2172 | ||
2173 | switch (consumer->type) { | |
2174 | case CONSUMER_DST_LOCAL: | |
2175 | DBG2("Consumer output is local. Creating directory(ies)"); | |
2176 | ||
2177 | /* Create directory(ies) */ | |
2178 | ret = run_as_mkdir_recursive(consumer->dst.trace_path, | |
2179 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2180 | if (ret < 0) { | |
2181 | if (ret != -EEXIST) { | |
2182 | ERR("Trace directory creation error"); | |
f73fabfd | 2183 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2184 | goto error; |
2185 | } | |
2186 | } | |
2187 | break; | |
2188 | case CONSUMER_DST_NET: | |
2189 | DBG2("Consumer output is network. Validating URIs"); | |
2190 | /* Validate if we have both control and data path set. */ | |
2191 | if (!consumer->dst.net.control_isset) { | |
f73fabfd | 2192 | ret = LTTNG_ERR_URL_CTRL_MISS; |
2f77fc4b DG |
2193 | goto error; |
2194 | } | |
2195 | ||
2196 | if (!consumer->dst.net.data_isset) { | |
f73fabfd | 2197 | ret = LTTNG_ERR_URL_DATA_MISS; |
2f77fc4b DG |
2198 | goto error; |
2199 | } | |
2200 | ||
2201 | /* Check established network session state */ | |
2202 | if (session->net_handle == 0) { | |
f73fabfd | 2203 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2204 | ERR("Session network handle is not set on enable-consumer"); |
2205 | goto error; | |
2206 | } | |
2207 | ||
2208 | break; | |
2209 | } | |
2210 | ||
2211 | /* Append default kernel trace dir to subdir */ | |
2212 | strncat(ksess->consumer->subdir, DEFAULT_KERNEL_TRACE_DIR, | |
c30ce0b3 CB |
2213 | sizeof(ksess->consumer->subdir) - |
2214 | strlen(ksess->consumer->subdir) - 1); | |
2f77fc4b DG |
2215 | |
2216 | /* | |
2217 | * @session-lock | |
2218 | * This is race free for now since the session lock is acquired before | |
2219 | * ending up in this function. No other threads can access this kernel | |
2220 | * session without this lock hence freeing the consumer output object | |
2221 | * is valid. | |
2222 | */ | |
2223 | rcu_read_lock(); | |
2224 | consumer_destroy_output(ksess->consumer); | |
2225 | rcu_read_unlock(); | |
2226 | ksess->consumer = consumer; | |
2227 | ksess->tmp_consumer = NULL; | |
2228 | ||
2229 | break; | |
2230 | case LTTNG_DOMAIN_UST: | |
2231 | /* Code flow error if we don't have a UST session here. */ | |
2232 | assert(usess); | |
2233 | ||
2234 | /* | |
2235 | * Check if we have already sent fds to the consumer. In that case, | |
2236 | * the enable-consumer command can't be used because a start trace | |
2237 | * had previously occured. | |
2238 | */ | |
2239 | if (usess->start_trace) { | |
f73fabfd | 2240 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2241 | goto error; |
2242 | } | |
2243 | ||
2244 | consumer = usess->tmp_consumer; | |
2245 | if (consumer == NULL) { | |
f73fabfd | 2246 | ret = LTTNG_OK; |
2f77fc4b DG |
2247 | /* No temp. consumer output exists. Using the current one. */ |
2248 | DBG3("No temporary consumer. Using default"); | |
2249 | consumer = usess->consumer; | |
2250 | goto error; | |
2251 | } | |
2252 | ||
2253 | switch (consumer->type) { | |
2254 | case CONSUMER_DST_LOCAL: | |
2255 | DBG2("Consumer output is local. Creating directory(ies)"); | |
2256 | ||
2257 | /* Create directory(ies) */ | |
2258 | ret = run_as_mkdir_recursive(consumer->dst.trace_path, | |
2259 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2260 | if (ret < 0) { | |
2261 | if (ret != -EEXIST) { | |
2262 | ERR("Trace directory creation error"); | |
f73fabfd | 2263 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2264 | goto error; |
2265 | } | |
2266 | } | |
2267 | break; | |
2268 | case CONSUMER_DST_NET: | |
2269 | DBG2("Consumer output is network. Validating URIs"); | |
2270 | /* Validate if we have both control and data path set. */ | |
2271 | if (!consumer->dst.net.control_isset) { | |
f73fabfd | 2272 | ret = LTTNG_ERR_URL_CTRL_MISS; |
2f77fc4b DG |
2273 | goto error; |
2274 | } | |
2275 | ||
2276 | if (!consumer->dst.net.data_isset) { | |
f73fabfd | 2277 | ret = LTTNG_ERR_URL_DATA_MISS; |
2f77fc4b DG |
2278 | goto error; |
2279 | } | |
2280 | ||
2281 | /* Check established network session state */ | |
2282 | if (session->net_handle == 0) { | |
f73fabfd | 2283 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2284 | DBG2("Session network handle is not set on enable-consumer"); |
2285 | goto error; | |
2286 | } | |
2287 | ||
2288 | if (consumer->net_seq_index == -1) { | |
f73fabfd | 2289 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2290 | DBG2("Network index is not set on the consumer"); |
2291 | goto error; | |
2292 | } | |
2293 | ||
2294 | break; | |
2295 | } | |
2296 | ||
2297 | /* Append default kernel trace dir to subdir */ | |
2298 | strncat(usess->consumer->subdir, DEFAULT_UST_TRACE_DIR, | |
c30ce0b3 CB |
2299 | sizeof(usess->consumer->subdir) - |
2300 | strlen(usess->consumer->subdir) - 1); | |
2f77fc4b DG |
2301 | |
2302 | /* | |
2303 | * @session-lock | |
2304 | * This is race free for now since the session lock is acquired before | |
2305 | * ending up in this function. No other threads can access this kernel | |
2306 | * session without this lock hence freeing the consumer output object | |
2307 | * is valid. | |
2308 | */ | |
2309 | rcu_read_lock(); | |
2310 | consumer_destroy_output(usess->consumer); | |
2311 | rcu_read_unlock(); | |
2312 | usess->consumer = consumer; | |
2313 | usess->tmp_consumer = NULL; | |
2314 | ||
2315 | break; | |
2316 | } | |
2317 | ||
2318 | /* Enable it */ | |
2319 | if (consumer) { | |
2320 | consumer->enabled = 1; | |
2321 | /* Success at this point */ | |
f73fabfd | 2322 | ret = LTTNG_OK; |
2f77fc4b DG |
2323 | } else { |
2324 | /* Should not really happend... */ | |
f73fabfd | 2325 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2326 | } |
2327 | ||
2328 | error: | |
2329 | return ret; | |
2330 | } | |
2331 | ||
2332 | /* | |
2333 | * Init command subsystem. | |
2334 | */ | |
2335 | void cmd_init(void) | |
2336 | { | |
2337 | /* | |
2338 | * Set network sequence index to 1 for streams to match a relayd socket on | |
2339 | * the consumer side. | |
2340 | */ | |
2341 | uatomic_set(&relayd_net_seq_idx, 1); | |
2342 | ||
2343 | DBG("Command subsystem initialized"); | |
2344 | } |