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" | |
7972aab2 | 31 | #include "health.h" |
2f77fc4b DG |
32 | #include "kernel.h" |
33 | #include "kernel-consumer.h" | |
34 | #include "lttng-sessiond.h" | |
35 | #include "utils.h" | |
36 | ||
37 | #include "cmd.h" | |
38 | ||
39 | /* | |
40 | * Used to keep a unique index for each relayd socket created where this value | |
41 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
42 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
43 | * held. | |
2f77fc4b | 44 | */ |
d88aee68 DG |
45 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
46 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b DG |
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 | ||
9aa9f900 DG |
104 | /* |
105 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
106 | * to print. | |
107 | */ | |
9d035200 | 108 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
109 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
110 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
111 | } else { | |
9aa9f900 DG |
112 | int dport; |
113 | if (kuri) { | |
114 | dport = kdata_port; | |
115 | } else { | |
116 | /* No kernel URI, use the UST port. */ | |
117 | dport = udata_port; | |
118 | } | |
119 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
120 | } |
121 | ||
122 | error: | |
123 | return ret; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Fill lttng_channel array of all channels. | |
128 | */ | |
129 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
130 | struct lttng_channel *channels) | |
131 | { | |
132 | int i = 0; | |
133 | struct ltt_kernel_channel *kchan; | |
134 | ||
135 | DBG("Listing channels for session %s", session->name); | |
136 | ||
137 | switch (domain) { | |
138 | case LTTNG_DOMAIN_KERNEL: | |
139 | /* Kernel channels */ | |
140 | if (session->kernel_session != NULL) { | |
141 | cds_list_for_each_entry(kchan, | |
142 | &session->kernel_session->channel_list.head, list) { | |
143 | /* Copy lttng_channel struct to array */ | |
144 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
145 | channels[i].enabled = kchan->enabled; | |
146 | i++; | |
147 | } | |
148 | } | |
149 | break; | |
150 | case LTTNG_DOMAIN_UST: | |
151 | { | |
152 | struct lttng_ht_iter iter; | |
153 | struct ltt_ust_channel *uchan; | |
154 | ||
e7fe706f | 155 | rcu_read_lock(); |
2f77fc4b DG |
156 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
157 | &iter.iter, uchan, node.node) { | |
158 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
159 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
160 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
161 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
162 | channels[i].attr.switch_timer_interval = | |
163 | uchan->attr.switch_timer_interval; | |
164 | channels[i].attr.read_timer_interval = | |
165 | uchan->attr.read_timer_interval; | |
166 | channels[i].enabled = uchan->enabled; | |
167 | switch (uchan->attr.output) { | |
168 | case LTTNG_UST_MMAP: | |
169 | default: | |
170 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
171 | break; | |
172 | } | |
173 | i++; | |
174 | } | |
e7fe706f | 175 | rcu_read_unlock(); |
2f77fc4b DG |
176 | break; |
177 | } | |
178 | default: | |
179 | break; | |
180 | } | |
181 | } | |
182 | ||
183 | /* | |
184 | * Create a list of ust global domain events. | |
185 | */ | |
186 | static int list_lttng_ust_global_events(char *channel_name, | |
187 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
188 | { | |
189 | int i = 0, ret = 0; | |
190 | unsigned int nb_event = 0; | |
191 | struct lttng_ht_iter iter; | |
192 | struct lttng_ht_node_str *node; | |
193 | struct ltt_ust_channel *uchan; | |
194 | struct ltt_ust_event *uevent; | |
195 | struct lttng_event *tmp; | |
196 | ||
197 | DBG("Listing UST global events for channel %s", channel_name); | |
198 | ||
199 | rcu_read_lock(); | |
200 | ||
201 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
202 | node = lttng_ht_iter_get_node_str(&iter); | |
203 | if (node == NULL) { | |
f73fabfd | 204 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
205 | goto error; |
206 | } | |
207 | ||
208 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
209 | ||
210 | nb_event += lttng_ht_get_count(uchan->events); | |
211 | ||
212 | if (nb_event == 0) { | |
213 | ret = nb_event; | |
214 | goto error; | |
215 | } | |
216 | ||
217 | DBG3("Listing UST global %d events", nb_event); | |
218 | ||
219 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
220 | if (tmp == NULL) { | |
f73fabfd | 221 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
222 | goto error; |
223 | } | |
224 | ||
225 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
226 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
227 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
228 | tmp[i].enabled = uevent->enabled; | |
229 | ||
230 | switch (uevent->attr.instrumentation) { | |
231 | case LTTNG_UST_TRACEPOINT: | |
232 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
233 | break; | |
234 | case LTTNG_UST_PROBE: | |
235 | tmp[i].type = LTTNG_EVENT_PROBE; | |
236 | break; | |
237 | case LTTNG_UST_FUNCTION: | |
238 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
239 | break; | |
240 | } | |
241 | ||
242 | tmp[i].loglevel = uevent->attr.loglevel; | |
243 | switch (uevent->attr.loglevel_type) { | |
244 | case LTTNG_UST_LOGLEVEL_ALL: | |
245 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
246 | break; | |
247 | case LTTNG_UST_LOGLEVEL_RANGE: | |
248 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
249 | break; | |
250 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
251 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
252 | break; | |
253 | } | |
254 | if (uevent->filter) { | |
255 | tmp[i].filter = 1; | |
256 | } | |
257 | i++; | |
258 | } | |
259 | ||
260 | ret = nb_event; | |
261 | *events = tmp; | |
262 | ||
263 | error: | |
264 | rcu_read_unlock(); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | /* | |
269 | * Fill lttng_event array of all kernel events in the channel. | |
270 | */ | |
271 | static int list_lttng_kernel_events(char *channel_name, | |
272 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
273 | { | |
274 | int i = 0, ret; | |
275 | unsigned int nb_event; | |
276 | struct ltt_kernel_event *event; | |
277 | struct ltt_kernel_channel *kchan; | |
278 | ||
279 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
280 | if (kchan == NULL) { | |
f73fabfd | 281 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
282 | goto error; |
283 | } | |
284 | ||
285 | nb_event = kchan->event_count; | |
286 | ||
287 | DBG("Listing events for channel %s", kchan->channel->name); | |
288 | ||
289 | if (nb_event == 0) { | |
f73fabfd | 290 | goto end; |
2f77fc4b DG |
291 | } |
292 | ||
293 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
294 | if (*events == NULL) { | |
f73fabfd | 295 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
296 | goto error; |
297 | } | |
298 | ||
299 | /* Kernel channels */ | |
300 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
301 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
302 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
303 | (*events)[i].enabled = event->enabled; | |
304 | ||
305 | switch (event->event->instrumentation) { | |
306 | case LTTNG_KERNEL_TRACEPOINT: | |
307 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
308 | break; | |
2f77fc4b | 309 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
310 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
311 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
312 | sizeof(struct lttng_kernel_kprobe)); | |
313 | break; | |
314 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
315 | (*events)[i].type = LTTNG_EVENT_PROBE; |
316 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
317 | sizeof(struct lttng_kernel_kprobe)); | |
318 | break; | |
319 | case LTTNG_KERNEL_FUNCTION: | |
320 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
321 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
322 | sizeof(struct lttng_kernel_function)); | |
323 | break; | |
324 | case LTTNG_KERNEL_NOOP: | |
325 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
326 | break; | |
327 | case LTTNG_KERNEL_SYSCALL: | |
328 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
329 | break; | |
330 | case LTTNG_KERNEL_ALL: | |
331 | assert(0); | |
332 | break; | |
333 | } | |
334 | i++; | |
335 | } | |
336 | ||
f73fabfd | 337 | end: |
2f77fc4b DG |
338 | return nb_event; |
339 | ||
340 | error: | |
f73fabfd DG |
341 | /* Negate the error code to differentiate the size from an error */ |
342 | return -ret; | |
2f77fc4b DG |
343 | } |
344 | ||
345 | /* | |
346 | * Add URI so the consumer output object. Set the correct path depending on the | |
347 | * domain adding the default trace directory. | |
348 | */ | |
349 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
350 | struct lttng_uri *uri, int domain, const char *session_name) | |
351 | { | |
f73fabfd | 352 | int ret = LTTNG_OK; |
2f77fc4b DG |
353 | const char *default_trace_dir; |
354 | ||
355 | assert(uri); | |
356 | ||
357 | if (consumer == NULL) { | |
358 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 359 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
360 | goto error; |
361 | } | |
362 | ||
363 | switch (domain) { | |
364 | case LTTNG_DOMAIN_KERNEL: | |
365 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
366 | break; | |
367 | case LTTNG_DOMAIN_UST: | |
368 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
369 | break; | |
370 | default: | |
371 | /* | |
372 | * This case is possible is we try to add the URI to the global tracing | |
373 | * session consumer object which in this case there is no subdir. | |
374 | */ | |
375 | default_trace_dir = ""; | |
376 | } | |
377 | ||
378 | switch (uri->dtype) { | |
379 | case LTTNG_DST_IPV4: | |
380 | case LTTNG_DST_IPV6: | |
381 | DBG2("Setting network URI to consumer"); | |
382 | ||
ffe60014 DG |
383 | consumer->type = CONSUMER_DST_NET; |
384 | ||
785d2d0d DG |
385 | if ((uri->stype == LTTNG_STREAM_CONTROL && |
386 | consumer->dst.net.control_isset) || | |
387 | (uri->stype == LTTNG_STREAM_DATA && | |
388 | consumer->dst.net.data_isset)) { | |
389 | ret = LTTNG_ERR_URL_EXIST; | |
390 | goto error; | |
391 | } | |
392 | ||
2f77fc4b DG |
393 | /* Set URI into consumer output object */ |
394 | ret = consumer_set_network_uri(consumer, uri); | |
395 | if (ret < 0) { | |
f73fabfd | 396 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
397 | goto error; |
398 | } else if (ret == 1) { | |
399 | /* | |
400 | * URI was the same in the consumer so we do not append the subdir | |
401 | * again so to not duplicate output dir. | |
402 | */ | |
403 | goto error; | |
404 | } | |
405 | ||
406 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
407 | ret = consumer_set_subdir(consumer, session_name); | |
408 | if (ret < 0) { | |
f73fabfd | 409 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
410 | goto error; |
411 | } | |
412 | } | |
413 | ||
414 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
415 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
416 | strncat(consumer->subdir, default_trace_dir, |
417 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
418 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
419 | } | |
420 | ||
421 | break; | |
422 | case LTTNG_DST_PATH: | |
423 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
424 | memset(consumer->dst.trace_path, 0, | |
425 | sizeof(consumer->dst.trace_path)); | |
426 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
427 | sizeof(consumer->dst.trace_path)); | |
428 | /* Append default trace dir */ | |
429 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
430 | sizeof(consumer->dst.trace_path) - |
431 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
432 | /* Flag consumer as local. */ |
433 | consumer->type = CONSUMER_DST_LOCAL; | |
434 | break; | |
435 | } | |
436 | ||
437 | error: | |
438 | return ret; | |
439 | } | |
440 | ||
441 | /* | |
442 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
443 | */ | |
444 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
445 | { | |
446 | int ret = 0; | |
447 | struct lttng_ht_iter iter; | |
448 | struct consumer_socket *socket; | |
449 | ||
450 | assert(session); | |
451 | ||
e7fe706f DG |
452 | rcu_read_lock(); |
453 | ||
2f77fc4b DG |
454 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
455 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
456 | socket, node.node) { | |
457 | /* Code flow error */ | |
458 | assert(socket->fd >= 0); | |
459 | ||
460 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 461 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
462 | pthread_mutex_unlock(socket->lock); |
463 | if (ret < 0) { | |
f73fabfd | 464 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
465 | goto error; |
466 | } | |
467 | } | |
468 | } | |
469 | ||
470 | error: | |
e7fe706f | 471 | rcu_read_unlock(); |
2f77fc4b DG |
472 | return ret; |
473 | } | |
474 | ||
475 | /* | |
476 | * Create a socket to the relayd using the URI. | |
477 | * | |
478 | * On success, the relayd_sock pointer is set to the created socket. | |
479 | * Else, it's stays untouched and a lttcomm error code is returned. | |
480 | */ | |
6151a90f JD |
481 | static int create_connect_relayd(struct lttng_uri *uri, |
482 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
483 | { |
484 | int ret; | |
6151a90f | 485 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 486 | |
6151a90f JD |
487 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
488 | RELAYD_VERSION_COMM_MINOR); | |
489 | if (!rsock) { | |
f73fabfd | 490 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
491 | goto error; |
492 | } | |
493 | ||
ffe60014 DG |
494 | /* |
495 | * Connect to relayd so we can proceed with a session creation. This call | |
496 | * can possibly block for an arbitrary amount of time to set the health | |
497 | * state to be in poll execution. | |
498 | */ | |
499 | health_poll_entry(); | |
6151a90f | 500 | ret = relayd_connect(rsock); |
ffe60014 | 501 | health_poll_exit(); |
2f77fc4b DG |
502 | if (ret < 0) { |
503 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 504 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
505 | goto free_sock; |
506 | } | |
507 | ||
508 | /* Create socket for control stream. */ | |
509 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
510 | DBG3("Creating relayd stream socket from URI"); | |
511 | ||
512 | /* Check relayd version */ | |
6151a90f | 513 | ret = relayd_version_check(rsock); |
2f77fc4b | 514 | if (ret < 0) { |
f73fabfd | 515 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
516 | goto close_sock; |
517 | } | |
518 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
519 | DBG3("Creating relayd data socket from URI"); | |
520 | } else { | |
521 | /* Command is not valid */ | |
522 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 523 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
524 | goto close_sock; |
525 | } | |
526 | ||
6151a90f | 527 | *relayd_sock = rsock; |
2f77fc4b | 528 | |
f73fabfd | 529 | return LTTNG_OK; |
2f77fc4b DG |
530 | |
531 | close_sock: | |
6151a90f JD |
532 | /* The returned value is not useful since we are on an error path. */ |
533 | (void) relayd_close(rsock); | |
2f77fc4b | 534 | free_sock: |
6151a90f | 535 | free(rsock); |
2f77fc4b DG |
536 | error: |
537 | return ret; | |
538 | } | |
539 | ||
540 | /* | |
541 | * Connect to the relayd using URI and send the socket to the right consumer. | |
542 | */ | |
543 | static int send_consumer_relayd_socket(int domain, struct ltt_session *session, | |
544 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
f50f23d9 | 545 | struct consumer_socket *consumer_sock) |
2f77fc4b DG |
546 | { |
547 | int ret; | |
6151a90f | 548 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 549 | |
ffe60014 | 550 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 551 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 552 | if (ret != LTTNG_OK) { |
6151a90f | 553 | goto error; |
ffe60014 | 554 | } |
6151a90f | 555 | assert(rsock); |
ffe60014 DG |
556 | |
557 | /* If the control socket is connected, network session is ready */ | |
558 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
559 | session->net_handle = 1; | |
560 | } | |
561 | ||
2f77fc4b | 562 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
563 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
564 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
565 | /* |
566 | * Increment net_seq_idx because we are about to transfer the | |
567 | * new relayd socket to the consumer. | |
d88aee68 | 568 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 569 | */ |
d88aee68 DG |
570 | consumer->net_seq_index = ++relayd_net_seq_idx; |
571 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
572 | } |
573 | ||
2f77fc4b | 574 | /* Send relayd socket to consumer. */ |
6151a90f JD |
575 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
576 | relayd_uri->stype, session->id); | |
2f77fc4b | 577 | if (ret < 0) { |
f73fabfd | 578 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
579 | goto close_sock; |
580 | } | |
581 | ||
c890b720 DG |
582 | /* Flag that the corresponding socket was sent. */ |
583 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 584 | consumer_sock->control_sock_sent = 1; |
c890b720 | 585 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 586 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
587 | } |
588 | ||
f73fabfd | 589 | ret = LTTNG_OK; |
2f77fc4b DG |
590 | |
591 | /* | |
592 | * Close socket which was dup on the consumer side. The session daemon does | |
593 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
594 | */ | |
595 | ||
596 | close_sock: | |
6151a90f JD |
597 | (void) relayd_close(rsock); |
598 | free(rsock); | |
2f77fc4b | 599 | |
6151a90f | 600 | error: |
ffe60014 DG |
601 | if (ret != LTTNG_OK) { |
602 | /* | |
603 | * On error, nullify the consumer sequence index so streams are not | |
604 | * associated with it once sent to the consumer. | |
605 | */ | |
606 | uatomic_set(&consumer->net_seq_index, -1); | |
607 | } | |
2f77fc4b DG |
608 | return ret; |
609 | } | |
610 | ||
611 | /* | |
612 | * Send both relayd sockets to a specific consumer and domain. This is a | |
613 | * helper function to facilitate sending the information to the consumer for a | |
614 | * session. | |
615 | */ | |
616 | static int send_consumer_relayd_sockets(int domain, | |
f50f23d9 DG |
617 | struct ltt_session *session, struct consumer_output *consumer, |
618 | struct consumer_socket *sock) | |
2f77fc4b | 619 | { |
dda67f6c | 620 | int ret = LTTNG_OK; |
2f77fc4b DG |
621 | |
622 | assert(session); | |
623 | assert(consumer); | |
624 | ||
2f77fc4b | 625 | /* Sending control relayd socket. */ |
ffe60014 | 626 | if (!sock->control_sock_sent) { |
c890b720 | 627 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 628 | &consumer->dst.net.control, consumer, sock); |
c890b720 DG |
629 | if (ret != LTTNG_OK) { |
630 | goto error; | |
631 | } | |
2f77fc4b DG |
632 | } |
633 | ||
634 | /* Sending data relayd socket. */ | |
ffe60014 | 635 | if (!sock->data_sock_sent) { |
c890b720 | 636 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 637 | &consumer->dst.net.data, consumer, sock); |
c890b720 DG |
638 | if (ret != LTTNG_OK) { |
639 | goto error; | |
640 | } | |
2f77fc4b DG |
641 | } |
642 | ||
2f77fc4b DG |
643 | error: |
644 | return ret; | |
645 | } | |
646 | ||
647 | /* | |
648 | * Setup relayd connections for a tracing session. First creates the socket to | |
649 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
650 | * network. | |
651 | */ | |
ffe60014 | 652 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 653 | { |
f73fabfd | 654 | int ret = LTTNG_OK; |
2f77fc4b DG |
655 | struct ltt_ust_session *usess; |
656 | struct ltt_kernel_session *ksess; | |
657 | struct consumer_socket *socket; | |
658 | struct lttng_ht_iter iter; | |
659 | ||
660 | assert(session); | |
661 | ||
662 | usess = session->ust_session; | |
663 | ksess = session->kernel_session; | |
664 | ||
785d2d0d | 665 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 666 | |
e7fe706f DG |
667 | rcu_read_lock(); |
668 | ||
2f77fc4b DG |
669 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
670 | && usess->consumer->enabled) { | |
671 | /* For each consumer socket, send relayd sockets */ | |
672 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
673 | socket, node.node) { | |
674 | /* Code flow error */ | |
675 | assert(socket->fd >= 0); | |
676 | ||
677 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 678 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session, |
f50f23d9 | 679 | usess->consumer, socket); |
2f77fc4b | 680 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 681 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
682 | goto error; |
683 | } | |
684 | } | |
685 | } | |
686 | ||
687 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
688 | && ksess->consumer->enabled) { | |
689 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
690 | socket, node.node) { | |
691 | /* Code flow error */ | |
692 | assert(socket->fd >= 0); | |
693 | ||
694 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 695 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session, |
f50f23d9 | 696 | ksess->consumer, socket); |
2f77fc4b | 697 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 698 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
699 | goto error; |
700 | } | |
701 | } | |
702 | } | |
703 | ||
704 | error: | |
e7fe706f | 705 | rcu_read_unlock(); |
2f77fc4b DG |
706 | return ret; |
707 | } | |
708 | ||
9b6c7ec5 DG |
709 | /* |
710 | * Start a kernel session by opening all necessary streams. | |
711 | */ | |
712 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
713 | { | |
714 | int ret; | |
715 | struct ltt_kernel_channel *kchan; | |
716 | ||
717 | /* Open kernel metadata */ | |
718 | if (ksess->metadata == NULL) { | |
719 | ret = kernel_open_metadata(ksess); | |
720 | if (ret < 0) { | |
721 | ret = LTTNG_ERR_KERN_META_FAIL; | |
722 | goto error; | |
723 | } | |
724 | } | |
725 | ||
726 | /* Open kernel metadata stream */ | |
727 | if (ksess->metadata_stream_fd < 0) { | |
728 | ret = kernel_open_metadata_stream(ksess); | |
729 | if (ret < 0) { | |
730 | ERR("Kernel create metadata stream failed"); | |
731 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
732 | goto error; | |
733 | } | |
734 | } | |
735 | ||
736 | /* For each channel */ | |
737 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
738 | if (kchan->stream_count == 0) { | |
739 | ret = kernel_open_channel_stream(kchan); | |
740 | if (ret < 0) { | |
741 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
742 | goto error; | |
743 | } | |
744 | /* Update the stream global counter */ | |
745 | ksess->stream_count_global += ret; | |
746 | } | |
747 | } | |
748 | ||
749 | /* Setup kernel consumer socket and send fds to it */ | |
750 | ret = init_kernel_tracing(ksess); | |
751 | if (ret < 0) { | |
752 | ret = LTTNG_ERR_KERN_START_FAIL; | |
753 | goto error; | |
754 | } | |
755 | ||
756 | /* This start the kernel tracing */ | |
757 | ret = kernel_start_session(ksess); | |
758 | if (ret < 0) { | |
759 | ret = LTTNG_ERR_KERN_START_FAIL; | |
760 | goto error; | |
761 | } | |
762 | ||
763 | /* Quiescent wait after starting trace */ | |
784303b0 | 764 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
765 | |
766 | ksess->started = 1; | |
767 | ||
768 | ret = LTTNG_OK; | |
769 | ||
770 | error: | |
771 | return ret; | |
772 | } | |
773 | ||
2f77fc4b DG |
774 | /* |
775 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
776 | */ | |
777 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
778 | char *channel_name) | |
779 | { | |
780 | int ret; | |
781 | struct ltt_ust_session *usess; | |
782 | ||
783 | usess = session->ust_session; | |
784 | ||
2223c96f DG |
785 | rcu_read_lock(); |
786 | ||
2f77fc4b DG |
787 | switch (domain) { |
788 | case LTTNG_DOMAIN_KERNEL: | |
789 | { | |
790 | ret = channel_kernel_disable(session->kernel_session, | |
791 | channel_name); | |
f73fabfd | 792 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
793 | goto error; |
794 | } | |
795 | ||
796 | kernel_wait_quiescent(kernel_tracer_fd); | |
797 | break; | |
798 | } | |
799 | case LTTNG_DOMAIN_UST: | |
800 | { | |
801 | struct ltt_ust_channel *uchan; | |
802 | struct lttng_ht *chan_ht; | |
803 | ||
804 | chan_ht = usess->domain_global.channels; | |
805 | ||
806 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
807 | if (uchan == NULL) { | |
f73fabfd | 808 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
809 | goto error; |
810 | } | |
811 | ||
7972aab2 | 812 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 813 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
814 | goto error; |
815 | } | |
816 | break; | |
817 | } | |
818 | #if 0 | |
819 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
820 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
821 | case LTTNG_DOMAIN_UST_PID: | |
822 | #endif | |
823 | default: | |
f73fabfd | 824 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
825 | goto error; |
826 | } | |
827 | ||
f73fabfd | 828 | ret = LTTNG_OK; |
2f77fc4b DG |
829 | |
830 | error: | |
2223c96f | 831 | rcu_read_unlock(); |
2f77fc4b DG |
832 | return ret; |
833 | } | |
834 | ||
835 | /* | |
836 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
837 | * | |
838 | * The wpipe arguments is used as a notifier for the kernel thread. | |
839 | */ | |
840 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 841 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
842 | { |
843 | int ret; | |
844 | struct ltt_ust_session *usess = session->ust_session; | |
845 | struct lttng_ht *chan_ht; | |
846 | ||
847 | assert(session); | |
848 | assert(attr); | |
7972aab2 | 849 | assert(domain); |
2f77fc4b DG |
850 | |
851 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
852 | ||
2223c96f DG |
853 | rcu_read_lock(); |
854 | ||
7972aab2 | 855 | switch (domain->type) { |
2f77fc4b DG |
856 | case LTTNG_DOMAIN_KERNEL: |
857 | { | |
858 | struct ltt_kernel_channel *kchan; | |
859 | ||
2f77fc4b DG |
860 | kchan = trace_kernel_get_channel_by_name(attr->name, |
861 | session->kernel_session); | |
862 | if (kchan == NULL) { | |
863 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
864 | } else { | |
865 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
866 | } | |
867 | ||
f73fabfd | 868 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
869 | goto error; |
870 | } | |
871 | ||
784303b0 | 872 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
873 | |
874 | /* | |
875 | * If the session was previously started, start as well this newly | |
876 | * created kernel session so the events/channels enabled *after* the | |
877 | * start actually work. | |
878 | */ | |
879 | if (session->started && !session->kernel_session->started) { | |
880 | ret = start_kernel_session(session->kernel_session, wpipe); | |
881 | if (ret != LTTNG_OK) { | |
882 | goto error; | |
883 | } | |
884 | } | |
2f77fc4b DG |
885 | break; |
886 | } | |
887 | case LTTNG_DOMAIN_UST: | |
888 | { | |
889 | struct ltt_ust_channel *uchan; | |
890 | ||
891 | chan_ht = usess->domain_global.channels; | |
892 | ||
893 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
894 | if (uchan == NULL) { | |
7972aab2 | 895 | ret = channel_ust_create(usess, attr, domain->buf_type); |
2f77fc4b | 896 | } else { |
7972aab2 | 897 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b | 898 | } |
9b6c7ec5 DG |
899 | |
900 | /* Start the UST session if the session was already started. */ | |
901 | if (session->started && !usess->start_trace) { | |
902 | ret = ust_app_start_trace_all(usess); | |
903 | if (ret < 0) { | |
904 | ret = LTTNG_ERR_UST_START_FAIL; | |
905 | goto error; | |
906 | } | |
907 | ret = LTTNG_OK; | |
908 | usess->start_trace = 1; | |
909 | } | |
2f77fc4b DG |
910 | break; |
911 | } | |
2f77fc4b | 912 | default: |
f73fabfd | 913 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
914 | goto error; |
915 | } | |
916 | ||
917 | error: | |
2223c96f | 918 | rcu_read_unlock(); |
2f77fc4b DG |
919 | return ret; |
920 | } | |
921 | ||
922 | ||
923 | /* | |
924 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
925 | */ | |
926 | int cmd_disable_event(struct ltt_session *session, int domain, | |
927 | char *channel_name, char *event_name) | |
928 | { | |
929 | int ret; | |
930 | ||
2223c96f DG |
931 | rcu_read_lock(); |
932 | ||
2f77fc4b DG |
933 | switch (domain) { |
934 | case LTTNG_DOMAIN_KERNEL: | |
935 | { | |
936 | struct ltt_kernel_channel *kchan; | |
937 | struct ltt_kernel_session *ksess; | |
938 | ||
939 | ksess = session->kernel_session; | |
940 | ||
941 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
942 | if (kchan == NULL) { | |
f73fabfd | 943 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
944 | goto error; |
945 | } | |
946 | ||
d3a56674 | 947 | ret = event_kernel_disable_tracepoint(kchan, event_name); |
f73fabfd | 948 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
949 | goto error; |
950 | } | |
951 | ||
952 | kernel_wait_quiescent(kernel_tracer_fd); | |
953 | break; | |
954 | } | |
955 | case LTTNG_DOMAIN_UST: | |
956 | { | |
957 | struct ltt_ust_channel *uchan; | |
958 | struct ltt_ust_session *usess; | |
959 | ||
960 | usess = session->ust_session; | |
961 | ||
962 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
963 | channel_name); | |
964 | if (uchan == NULL) { | |
f73fabfd | 965 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
966 | goto error; |
967 | } | |
968 | ||
7972aab2 | 969 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
f73fabfd | 970 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
971 | goto error; |
972 | } | |
973 | ||
974 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
975 | channel_name); | |
976 | break; | |
977 | } | |
978 | #if 0 | |
979 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
980 | case LTTNG_DOMAIN_UST_PID: | |
981 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
982 | #endif | |
983 | default: | |
f73fabfd | 984 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
985 | goto error; |
986 | } | |
987 | ||
f73fabfd | 988 | ret = LTTNG_OK; |
2f77fc4b DG |
989 | |
990 | error: | |
2223c96f | 991 | rcu_read_unlock(); |
2f77fc4b DG |
992 | return ret; |
993 | } | |
994 | ||
995 | /* | |
996 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
997 | */ | |
998 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
999 | char *channel_name) | |
1000 | { | |
1001 | int ret; | |
1002 | ||
2223c96f DG |
1003 | rcu_read_lock(); |
1004 | ||
2f77fc4b DG |
1005 | switch (domain) { |
1006 | case LTTNG_DOMAIN_KERNEL: | |
1007 | { | |
1008 | struct ltt_kernel_session *ksess; | |
1009 | struct ltt_kernel_channel *kchan; | |
1010 | ||
1011 | ksess = session->kernel_session; | |
1012 | ||
1013 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
1014 | if (kchan == NULL) { | |
f73fabfd | 1015 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1016 | goto error; |
1017 | } | |
1018 | ||
d3a56674 | 1019 | ret = event_kernel_disable_all(kchan); |
f73fabfd | 1020 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1021 | goto error; |
1022 | } | |
1023 | ||
1024 | kernel_wait_quiescent(kernel_tracer_fd); | |
1025 | break; | |
1026 | } | |
1027 | case LTTNG_DOMAIN_UST: | |
1028 | { | |
1029 | struct ltt_ust_session *usess; | |
1030 | struct ltt_ust_channel *uchan; | |
1031 | ||
1032 | usess = session->ust_session; | |
1033 | ||
1034 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1035 | channel_name); | |
1036 | if (uchan == NULL) { | |
f73fabfd | 1037 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1038 | goto error; |
1039 | } | |
1040 | ||
7972aab2 | 1041 | ret = event_ust_disable_all_tracepoints(usess, uchan); |
2f77fc4b DG |
1042 | if (ret != 0) { |
1043 | goto error; | |
1044 | } | |
1045 | ||
1046 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1047 | ||
1048 | break; | |
1049 | } | |
1050 | #if 0 | |
1051 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1052 | case LTTNG_DOMAIN_UST_PID: | |
1053 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1054 | #endif | |
1055 | default: | |
f73fabfd | 1056 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1057 | goto error; |
1058 | } | |
1059 | ||
f73fabfd | 1060 | ret = LTTNG_OK; |
2f77fc4b DG |
1061 | |
1062 | error: | |
2223c96f | 1063 | rcu_read_unlock(); |
2f77fc4b DG |
1064 | return ret; |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1069 | */ | |
1070 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1071 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b DG |
1072 | { |
1073 | int ret; | |
1074 | ||
1075 | switch (domain) { | |
1076 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1077 | assert(session->kernel_session); |
1078 | ||
1079 | if (session->kernel_session->channel_count == 0) { | |
1080 | /* Create default channel */ | |
1081 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1082 | if (ret != LTTNG_OK) { | |
1083 | goto error; | |
1084 | } | |
1085 | } | |
1086 | ||
2f77fc4b | 1087 | /* Add kernel context to kernel tracer */ |
601d5acf | 1088 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1089 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1090 | goto error; |
1091 | } | |
1092 | break; | |
1093 | case LTTNG_DOMAIN_UST: | |
1094 | { | |
1095 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
1096 | assert(usess); |
1097 | ||
979e618e DG |
1098 | unsigned int chan_count = |
1099 | lttng_ht_get_count(usess->domain_global.channels); | |
1100 | if (chan_count == 0) { | |
1101 | struct lttng_channel *attr; | |
1102 | /* Create default channel */ | |
1103 | attr = channel_new_default_attr(domain); | |
1104 | if (attr == NULL) { | |
1105 | ret = LTTNG_ERR_FATAL; | |
1106 | goto error; | |
1107 | } | |
1108 | ||
7972aab2 | 1109 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1110 | if (ret != LTTNG_OK) { |
1111 | free(attr); | |
1112 | goto error; | |
1113 | } | |
1114 | free(attr); | |
1115 | } | |
1116 | ||
601d5acf | 1117 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1118 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1119 | goto error; |
1120 | } | |
1121 | break; | |
1122 | } | |
1123 | #if 0 | |
1124 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1125 | case LTTNG_DOMAIN_UST_PID: | |
1126 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1127 | #endif | |
1128 | default: | |
f73fabfd | 1129 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1130 | goto error; |
1131 | } | |
1132 | ||
f73fabfd | 1133 | ret = LTTNG_OK; |
2f77fc4b DG |
1134 | |
1135 | error: | |
1136 | return ret; | |
1137 | } | |
1138 | ||
2f77fc4b DG |
1139 | /* |
1140 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1141 | */ | |
7972aab2 | 1142 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 DG |
1143 | char *channel_name, struct lttng_event *event, |
1144 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b | 1145 | { |
e5f5db7f | 1146 | int ret, channel_created = 0; |
2f77fc4b DG |
1147 | struct lttng_channel *attr; |
1148 | ||
1149 | assert(session); | |
1150 | assert(event); | |
1151 | assert(channel_name); | |
1152 | ||
2223c96f DG |
1153 | rcu_read_lock(); |
1154 | ||
7972aab2 | 1155 | switch (domain->type) { |
2f77fc4b DG |
1156 | case LTTNG_DOMAIN_KERNEL: |
1157 | { | |
1158 | struct ltt_kernel_channel *kchan; | |
1159 | ||
1160 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1161 | session->kernel_session); | |
1162 | if (kchan == NULL) { | |
7972aab2 | 1163 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL); |
2f77fc4b | 1164 | if (attr == NULL) { |
f73fabfd | 1165 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1166 | goto error; |
1167 | } | |
1168 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1169 | ||
1170 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1171 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1172 | free(attr); |
1173 | goto error; | |
1174 | } | |
1175 | free(attr); | |
e5f5db7f DG |
1176 | |
1177 | channel_created = 1; | |
2f77fc4b DG |
1178 | } |
1179 | ||
1180 | /* Get the newly created kernel channel pointer */ | |
1181 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1182 | session->kernel_session); | |
1183 | if (kchan == NULL) { | |
1184 | /* This sould not happen... */ | |
f73fabfd | 1185 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1186 | goto error; |
1187 | } | |
1188 | ||
d3a56674 | 1189 | ret = event_kernel_enable_tracepoint(kchan, event); |
f73fabfd | 1190 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1191 | if (channel_created) { |
1192 | /* Let's not leak a useless channel. */ | |
1193 | kernel_destroy_channel(kchan); | |
1194 | } | |
2f77fc4b DG |
1195 | goto error; |
1196 | } | |
1197 | ||
1198 | kernel_wait_quiescent(kernel_tracer_fd); | |
1199 | break; | |
1200 | } | |
1201 | case LTTNG_DOMAIN_UST: | |
1202 | { | |
1203 | struct ltt_ust_channel *uchan; | |
1204 | struct ltt_ust_session *usess = session->ust_session; | |
1205 | ||
1206 | assert(usess); | |
1207 | ||
1208 | /* Get channel from global UST domain */ | |
1209 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1210 | channel_name); | |
1211 | if (uchan == NULL) { | |
1212 | /* Create default channel */ | |
7972aab2 | 1213 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST); |
2f77fc4b | 1214 | if (attr == NULL) { |
f73fabfd | 1215 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1216 | goto error; |
1217 | } | |
1218 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1219 | ||
1220 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1221 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1222 | free(attr); |
1223 | goto error; | |
1224 | } | |
1225 | free(attr); | |
1226 | ||
1227 | /* Get the newly created channel reference back */ | |
1228 | uchan = trace_ust_find_channel_by_name( | |
1229 | usess->domain_global.channels, channel_name); | |
1230 | assert(uchan); | |
1231 | } | |
1232 | ||
1233 | /* At this point, the session and channel exist on the tracer */ | |
7972aab2 | 1234 | ret = event_ust_enable_tracepoint(usess, uchan, event, filter); |
f73fabfd | 1235 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1236 | goto error; |
1237 | } | |
1238 | break; | |
1239 | } | |
1240 | #if 0 | |
1241 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1242 | case LTTNG_DOMAIN_UST_PID: | |
1243 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1244 | #endif | |
1245 | default: | |
f73fabfd | 1246 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1247 | goto error; |
1248 | } | |
1249 | ||
f73fabfd | 1250 | ret = LTTNG_OK; |
2f77fc4b DG |
1251 | |
1252 | error: | |
2223c96f | 1253 | rcu_read_unlock(); |
2f77fc4b DG |
1254 | return ret; |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1259 | */ | |
7972aab2 DG |
1260 | int cmd_enable_event_all(struct ltt_session *session, |
1261 | struct lttng_domain *domain, char *channel_name, int event_type, | |
025faf73 | 1262 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1263 | { |
1264 | int ret; | |
1265 | struct lttng_channel *attr; | |
1266 | ||
1267 | assert(session); | |
1268 | assert(channel_name); | |
1269 | ||
2223c96f DG |
1270 | rcu_read_lock(); |
1271 | ||
7972aab2 | 1272 | switch (domain->type) { |
2f77fc4b DG |
1273 | case LTTNG_DOMAIN_KERNEL: |
1274 | { | |
1275 | struct ltt_kernel_channel *kchan; | |
1276 | ||
1277 | assert(session->kernel_session); | |
1278 | ||
1279 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1280 | session->kernel_session); | |
1281 | if (kchan == NULL) { | |
1282 | /* Create default channel */ | |
7972aab2 | 1283 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL); |
2f77fc4b | 1284 | if (attr == NULL) { |
f73fabfd | 1285 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1286 | goto error; |
1287 | } | |
1288 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1289 | ||
1290 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1291 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1292 | free(attr); |
1293 | goto error; | |
1294 | } | |
1295 | free(attr); | |
1296 | ||
1297 | /* Get the newly created kernel channel pointer */ | |
1298 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1299 | session->kernel_session); | |
1300 | assert(kchan); | |
1301 | } | |
1302 | ||
1303 | switch (event_type) { | |
1304 | case LTTNG_EVENT_SYSCALL: | |
d3a56674 | 1305 | ret = event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1306 | break; |
1307 | case LTTNG_EVENT_TRACEPOINT: | |
1308 | /* | |
1309 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1310 | * events already registered to the channel. | |
1311 | */ | |
d3a56674 | 1312 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1313 | break; |
1314 | case LTTNG_EVENT_ALL: | |
1315 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1316 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1317 | break; |
1318 | default: | |
f73fabfd | 1319 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1320 | goto error; |
1321 | } | |
1322 | ||
1323 | /* Manage return value */ | |
f73fabfd | 1324 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1325 | /* |
1326 | * On error, cmd_enable_channel call will take care of destroying | |
1327 | * the created channel if it was needed. | |
1328 | */ | |
2f77fc4b DG |
1329 | goto error; |
1330 | } | |
1331 | ||
1332 | kernel_wait_quiescent(kernel_tracer_fd); | |
1333 | break; | |
1334 | } | |
1335 | case LTTNG_DOMAIN_UST: | |
1336 | { | |
1337 | struct ltt_ust_channel *uchan; | |
1338 | struct ltt_ust_session *usess = session->ust_session; | |
1339 | ||
1340 | assert(usess); | |
1341 | ||
1342 | /* Get channel from global UST domain */ | |
1343 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1344 | channel_name); | |
1345 | if (uchan == NULL) { | |
1346 | /* Create default channel */ | |
7972aab2 | 1347 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST); |
2f77fc4b | 1348 | if (attr == NULL) { |
f73fabfd | 1349 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1350 | goto error; |
1351 | } | |
1352 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1353 | ||
1354 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1355 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1356 | free(attr); |
1357 | goto error; | |
1358 | } | |
1359 | free(attr); | |
1360 | ||
1361 | /* Get the newly created channel reference back */ | |
1362 | uchan = trace_ust_find_channel_by_name( | |
1363 | usess->domain_global.channels, channel_name); | |
1364 | assert(uchan); | |
1365 | } | |
1366 | ||
1367 | /* At this point, the session and channel exist on the tracer */ | |
1368 | ||
1369 | switch (event_type) { | |
1370 | case LTTNG_EVENT_ALL: | |
1371 | case LTTNG_EVENT_TRACEPOINT: | |
7972aab2 | 1372 | ret = event_ust_enable_all_tracepoints(usess, uchan, filter); |
f73fabfd | 1373 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1374 | goto error; |
1375 | } | |
1376 | break; | |
1377 | default: | |
f73fabfd | 1378 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1379 | goto error; |
1380 | } | |
1381 | ||
1382 | /* Manage return value */ | |
f73fabfd | 1383 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1384 | goto error; |
1385 | } | |
1386 | ||
1387 | break; | |
1388 | } | |
1389 | #if 0 | |
1390 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1391 | case LTTNG_DOMAIN_UST_PID: | |
1392 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1393 | #endif | |
1394 | default: | |
f73fabfd | 1395 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1396 | goto error; |
1397 | } | |
1398 | ||
f73fabfd | 1399 | ret = LTTNG_OK; |
2f77fc4b DG |
1400 | |
1401 | error: | |
2223c96f | 1402 | rcu_read_unlock(); |
2f77fc4b DG |
1403 | return ret; |
1404 | } | |
1405 | ||
1406 | ||
1407 | /* | |
1408 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1409 | */ | |
1410 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1411 | { | |
1412 | int ret; | |
1413 | ssize_t nb_events = 0; | |
1414 | ||
1415 | switch (domain) { | |
1416 | case LTTNG_DOMAIN_KERNEL: | |
1417 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1418 | if (nb_events < 0) { | |
f73fabfd | 1419 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1420 | goto error; |
1421 | } | |
1422 | break; | |
1423 | case LTTNG_DOMAIN_UST: | |
1424 | nb_events = ust_app_list_events(events); | |
1425 | if (nb_events < 0) { | |
f73fabfd | 1426 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1427 | goto error; |
1428 | } | |
1429 | break; | |
1430 | default: | |
f73fabfd | 1431 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1432 | goto error; |
1433 | } | |
1434 | ||
1435 | return nb_events; | |
1436 | ||
1437 | error: | |
1438 | /* Return negative value to differentiate return code */ | |
1439 | return -ret; | |
1440 | } | |
1441 | ||
1442 | /* | |
1443 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1444 | */ | |
1445 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1446 | struct lttng_event_field **fields) | |
1447 | { | |
1448 | int ret; | |
1449 | ssize_t nb_fields = 0; | |
1450 | ||
1451 | switch (domain) { | |
1452 | case LTTNG_DOMAIN_UST: | |
1453 | nb_fields = ust_app_list_event_fields(fields); | |
1454 | if (nb_fields < 0) { | |
f73fabfd | 1455 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1456 | goto error; |
1457 | } | |
1458 | break; | |
1459 | case LTTNG_DOMAIN_KERNEL: | |
1460 | default: /* fall-through */ | |
f73fabfd | 1461 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1462 | goto error; |
1463 | } | |
1464 | ||
1465 | return nb_fields; | |
1466 | ||
1467 | error: | |
1468 | /* Return negative value to differentiate return code */ | |
1469 | return -ret; | |
1470 | } | |
1471 | ||
1472 | /* | |
1473 | * Command LTTNG_START_TRACE processed by the client thread. | |
1474 | */ | |
1475 | int cmd_start_trace(struct ltt_session *session) | |
1476 | { | |
1477 | int ret; | |
1478 | struct ltt_kernel_session *ksession; | |
1479 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1480 | |
1481 | assert(session); | |
1482 | ||
1483 | /* Ease our life a bit ;) */ | |
1484 | ksession = session->kernel_session; | |
1485 | usess = session->ust_session; | |
1486 | ||
1487 | if (session->enabled) { | |
1488 | /* Already started. */ | |
f73fabfd | 1489 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1490 | goto error; |
1491 | } | |
1492 | ||
1493 | session->enabled = 1; | |
1494 | ||
2f77fc4b DG |
1495 | /* Kernel tracing */ |
1496 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1497 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1498 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1499 | goto error; |
1500 | } | |
2f77fc4b DG |
1501 | } |
1502 | ||
1503 | /* Flag session that trace should start automatically */ | |
1504 | if (usess) { | |
1505 | usess->start_trace = 1; | |
1506 | ||
1507 | ret = ust_app_start_trace_all(usess); | |
1508 | if (ret < 0) { | |
f73fabfd | 1509 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1510 | goto error; |
1511 | } | |
1512 | } | |
1513 | ||
9b6c7ec5 DG |
1514 | session->started = 1; |
1515 | ||
f73fabfd | 1516 | ret = LTTNG_OK; |
2f77fc4b DG |
1517 | |
1518 | error: | |
1519 | return ret; | |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1524 | */ | |
1525 | int cmd_stop_trace(struct ltt_session *session) | |
1526 | { | |
1527 | int ret; | |
1528 | struct ltt_kernel_channel *kchan; | |
1529 | struct ltt_kernel_session *ksession; | |
1530 | struct ltt_ust_session *usess; | |
1531 | ||
1532 | assert(session); | |
1533 | ||
1534 | /* Short cut */ | |
1535 | ksession = session->kernel_session; | |
1536 | usess = session->ust_session; | |
1537 | ||
1538 | if (!session->enabled) { | |
f73fabfd | 1539 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1540 | goto error; |
1541 | } | |
1542 | ||
1543 | session->enabled = 0; | |
1544 | ||
1545 | /* Kernel tracer */ | |
1546 | if (ksession) { | |
1547 | DBG("Stop kernel tracing"); | |
1548 | ||
1549 | /* Flush metadata if exist */ | |
1550 | if (ksession->metadata_stream_fd >= 0) { | |
1551 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1552 | if (ret < 0) { | |
1553 | ERR("Kernel metadata flush failed"); | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | /* Flush all buffers before stopping */ | |
1558 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1559 | ret = kernel_flush_buffer(kchan); | |
1560 | if (ret < 0) { | |
1561 | ERR("Kernel flush buffer error"); | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | ret = kernel_stop_session(ksession); | |
1566 | if (ret < 0) { | |
f73fabfd | 1567 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1568 | goto error; |
1569 | } | |
1570 | ||
1571 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 DG |
1572 | |
1573 | ksession->started = 0; | |
2f77fc4b DG |
1574 | } |
1575 | ||
1576 | if (usess) { | |
1577 | usess->start_trace = 0; | |
1578 | ||
1579 | ret = ust_app_stop_trace_all(usess); | |
1580 | if (ret < 0) { | |
f73fabfd | 1581 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1582 | goto error; |
1583 | } | |
1584 | } | |
1585 | ||
9b6c7ec5 DG |
1586 | session->started = 0; |
1587 | ||
f73fabfd | 1588 | ret = LTTNG_OK; |
2f77fc4b DG |
1589 | |
1590 | error: | |
1591 | return ret; | |
1592 | } | |
1593 | ||
1594 | /* | |
1595 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1596 | */ | |
1597 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1598 | size_t nb_uri, struct lttng_uri *uris) | |
1599 | { | |
1600 | int ret, i; | |
1601 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1602 | struct ltt_ust_session *usess = session->ust_session; | |
1603 | struct consumer_output *consumer = NULL; | |
1604 | ||
1605 | assert(session); | |
1606 | assert(uris); | |
1607 | assert(nb_uri > 0); | |
1608 | ||
1609 | /* Can't enable consumer after session started. */ | |
1610 | if (session->enabled) { | |
f73fabfd | 1611 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1612 | goto error; |
1613 | } | |
1614 | ||
2f77fc4b DG |
1615 | /* |
1616 | * This case switch makes sure the domain session has a temporary consumer | |
1617 | * so the URL can be set. | |
1618 | */ | |
1619 | switch (domain) { | |
1620 | case 0: | |
1621 | /* Code flow error. A session MUST always have a consumer object */ | |
1622 | assert(session->consumer); | |
1623 | /* | |
1624 | * The URL will be added to the tracing session consumer instead of a | |
1625 | * specific domain consumer. | |
1626 | */ | |
1627 | consumer = session->consumer; | |
1628 | break; | |
1629 | case LTTNG_DOMAIN_KERNEL: | |
1630 | /* Code flow error if we don't have a kernel session here. */ | |
1631 | assert(ksess); | |
785d2d0d DG |
1632 | assert(ksess->consumer); |
1633 | consumer = ksess->consumer; | |
2f77fc4b DG |
1634 | break; |
1635 | case LTTNG_DOMAIN_UST: | |
1636 | /* Code flow error if we don't have a kernel session here. */ | |
1637 | assert(usess); | |
785d2d0d DG |
1638 | assert(usess->consumer); |
1639 | consumer = usess->consumer; | |
2f77fc4b DG |
1640 | break; |
1641 | } | |
1642 | ||
1643 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b DG |
1644 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
1645 | if (ret < 0) { | |
1646 | goto error; | |
1647 | } | |
2f77fc4b DG |
1648 | } |
1649 | ||
1650 | /* All good! */ | |
f73fabfd | 1651 | ret = LTTNG_OK; |
2f77fc4b DG |
1652 | |
1653 | error: | |
1654 | return ret; | |
1655 | } | |
1656 | ||
1657 | /* | |
1658 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1659 | */ | |
1660 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
1661 | size_t nb_uri, lttng_sock_cred *creds) | |
1662 | { | |
1663 | int ret; | |
1664 | char *path = NULL; | |
1665 | struct ltt_session *session; | |
1666 | ||
1667 | assert(name); | |
1668 | ||
785d2d0d DG |
1669 | /* No URIs is not possible. */ |
1670 | if (uris == NULL) { | |
1671 | ret = LTTNG_ERR_SESSION_FAIL; | |
1672 | goto session_error; | |
1673 | } | |
1674 | ||
2f77fc4b DG |
1675 | /* |
1676 | * Verify if the session already exist | |
1677 | * | |
1678 | * XXX: There is no need for the session lock list here since the caller | |
1679 | * (process_client_msg) is holding it. We might want to change that so a | |
1680 | * single command does not lock the entire session list. | |
1681 | */ | |
1682 | session = session_find_by_name(name); | |
1683 | if (session != NULL) { | |
f73fabfd | 1684 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1685 | goto find_error; |
1686 | } | |
1687 | ||
1688 | /* Create tracing session in the registry */ | |
1689 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), | |
1690 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
f73fabfd | 1691 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1692 | goto session_error; |
1693 | } | |
1694 | ||
1695 | /* | |
1696 | * Get the newly created session pointer back | |
1697 | * | |
1698 | * XXX: There is no need for the session lock list here since the caller | |
1699 | * (process_client_msg) is holding it. We might want to change that so a | |
1700 | * single command does not lock the entire session list. | |
1701 | */ | |
1702 | session = session_find_by_name(name); | |
1703 | assert(session); | |
1704 | ||
1705 | /* Create default consumer output for the session not yet created. */ | |
1706 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1707 | if (session->consumer == NULL) { | |
f73fabfd | 1708 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1709 | goto consumer_error; |
1710 | } | |
1711 | ||
2f77fc4b | 1712 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); |
f73fabfd | 1713 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1714 | goto consumer_error; |
1715 | } | |
1716 | ||
1717 | session->consumer->enabled = 1; | |
1718 | ||
f73fabfd | 1719 | return LTTNG_OK; |
2f77fc4b DG |
1720 | |
1721 | consumer_error: | |
1722 | session_destroy(session); | |
1723 | session_error: | |
1724 | find_error: | |
1725 | return ret; | |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1730 | */ | |
1731 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1732 | { | |
1733 | int ret; | |
1734 | struct ltt_ust_session *usess; | |
1735 | struct ltt_kernel_session *ksess; | |
1736 | ||
1737 | /* Safety net */ | |
1738 | assert(session); | |
1739 | ||
1740 | usess = session->ust_session; | |
1741 | ksess = session->kernel_session; | |
1742 | ||
1743 | /* Clean kernel session teardown */ | |
1744 | kernel_destroy_session(ksess); | |
1745 | ||
1746 | /* UST session teardown */ | |
1747 | if (usess) { | |
1748 | /* Close any relayd session */ | |
1749 | consumer_output_send_destroy_relayd(usess->consumer); | |
1750 | ||
1751 | /* Destroy every UST application related to this session. */ | |
1752 | ret = ust_app_destroy_trace_all(usess); | |
1753 | if (ret) { | |
1754 | ERR("Error in ust_app_destroy_trace_all"); | |
1755 | } | |
1756 | ||
1757 | /* Clean up the rest. */ | |
1758 | trace_ust_destroy_session(usess); | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * Must notify the kernel thread here to update it's poll set in order to | |
1763 | * remove the channel(s)' fd just destroyed. | |
1764 | */ | |
1765 | ret = notify_thread_pipe(wpipe); | |
1766 | if (ret < 0) { | |
1767 | PERROR("write kernel poll pipe"); | |
1768 | } | |
1769 | ||
1770 | ret = session_destroy(session); | |
1771 | ||
1772 | return ret; | |
1773 | } | |
1774 | ||
1775 | /* | |
1776 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1777 | */ | |
1778 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1779 | { | |
1780 | int ret; | |
1781 | ||
1782 | switch (domain) { | |
1783 | case LTTNG_DOMAIN_KERNEL: | |
1784 | { | |
1785 | struct lttng_kernel_calibrate kcalibrate; | |
1786 | ||
1787 | kcalibrate.type = calibrate->type; | |
1788 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1789 | if (ret < 0) { | |
f73fabfd | 1790 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1791 | goto error; |
1792 | } | |
1793 | break; | |
1794 | } | |
1795 | case LTTNG_DOMAIN_UST: | |
1796 | { | |
1797 | struct lttng_ust_calibrate ucalibrate; | |
1798 | ||
1799 | ucalibrate.type = calibrate->type; | |
1800 | ret = ust_app_calibrate_glb(&ucalibrate); | |
1801 | if (ret < 0) { | |
f73fabfd | 1802 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
1803 | goto error; |
1804 | } | |
1805 | break; | |
1806 | } | |
1807 | default: | |
f73fabfd | 1808 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1809 | goto error; |
1810 | } | |
1811 | ||
f73fabfd | 1812 | ret = LTTNG_OK; |
2f77fc4b DG |
1813 | |
1814 | error: | |
1815 | return ret; | |
1816 | } | |
1817 | ||
1818 | /* | |
1819 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
1820 | */ | |
1821 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
1822 | const char *sock_path, struct consumer_data *cdata) | |
1823 | { | |
1824 | int ret, sock; | |
1825 | struct consumer_socket *socket; | |
1826 | ||
1827 | assert(session); | |
1828 | assert(cdata); | |
1829 | assert(sock_path); | |
1830 | ||
1831 | switch (domain) { | |
1832 | case LTTNG_DOMAIN_KERNEL: | |
1833 | { | |
1834 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1835 | ||
1836 | assert(ksess); | |
1837 | ||
1838 | /* Can't register a consumer if there is already one */ | |
1839 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 1840 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
1841 | goto error; |
1842 | } | |
1843 | ||
1844 | sock = lttcomm_connect_unix_sock(sock_path); | |
1845 | if (sock < 0) { | |
f73fabfd | 1846 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
1847 | goto error; |
1848 | } | |
1849 | ||
1850 | socket = consumer_allocate_socket(sock); | |
1851 | if (socket == NULL) { | |
f66c074c DG |
1852 | ret = close(sock); |
1853 | if (ret < 0) { | |
1854 | PERROR("close register consumer"); | |
1855 | } | |
f73fabfd | 1856 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1857 | goto error; |
1858 | } | |
1859 | ||
1860 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
1861 | if (socket->lock == NULL) { | |
1862 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 1863 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1864 | goto error; |
1865 | } | |
1866 | pthread_mutex_init(socket->lock, NULL); | |
1867 | socket->registered = 1; | |
1868 | ||
1869 | rcu_read_lock(); | |
1870 | consumer_add_socket(socket, ksess->consumer); | |
1871 | rcu_read_unlock(); | |
1872 | ||
1873 | pthread_mutex_lock(&cdata->pid_mutex); | |
1874 | cdata->pid = -1; | |
1875 | pthread_mutex_unlock(&cdata->pid_mutex); | |
1876 | ||
1877 | break; | |
1878 | } | |
1879 | default: | |
1880 | /* TODO: Userspace tracing */ | |
f73fabfd | 1881 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1882 | goto error; |
1883 | } | |
1884 | ||
f73fabfd | 1885 | ret = LTTNG_OK; |
2f77fc4b DG |
1886 | |
1887 | error: | |
1888 | return ret; | |
1889 | } | |
1890 | ||
1891 | /* | |
1892 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
1893 | */ | |
1894 | ssize_t cmd_list_domains(struct ltt_session *session, | |
1895 | struct lttng_domain **domains) | |
1896 | { | |
1897 | int ret, index = 0; | |
1898 | ssize_t nb_dom = 0; | |
1899 | ||
1900 | if (session->kernel_session != NULL) { | |
1901 | DBG3("Listing domains found kernel domain"); | |
1902 | nb_dom++; | |
1903 | } | |
1904 | ||
1905 | if (session->ust_session != NULL) { | |
1906 | DBG3("Listing domains found UST global domain"); | |
1907 | nb_dom++; | |
1908 | } | |
1909 | ||
1910 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
1911 | if (*domains == NULL) { | |
f73fabfd | 1912 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1913 | goto error; |
1914 | } | |
1915 | ||
1916 | if (session->kernel_session != NULL) { | |
1917 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
1918 | index++; | |
1919 | } | |
1920 | ||
1921 | if (session->ust_session != NULL) { | |
1922 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
1923 | index++; | |
1924 | } | |
1925 | ||
1926 | return nb_dom; | |
1927 | ||
1928 | error: | |
f73fabfd DG |
1929 | /* Return negative value to differentiate return code */ |
1930 | return -ret; | |
2f77fc4b DG |
1931 | } |
1932 | ||
1933 | ||
1934 | /* | |
1935 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
1936 | */ | |
1937 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
1938 | struct lttng_channel **channels) | |
1939 | { | |
1940 | int ret; | |
1941 | ssize_t nb_chan = 0; | |
1942 | ||
1943 | switch (domain) { | |
1944 | case LTTNG_DOMAIN_KERNEL: | |
1945 | if (session->kernel_session != NULL) { | |
1946 | nb_chan = session->kernel_session->channel_count; | |
1947 | } | |
1948 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
1949 | if (nb_chan <= 0) { |
1950 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
1951 | } | |
2f77fc4b DG |
1952 | break; |
1953 | case LTTNG_DOMAIN_UST: | |
1954 | if (session->ust_session != NULL) { | |
1955 | nb_chan = lttng_ht_get_count( | |
1956 | session->ust_session->domain_global.channels); | |
1957 | } | |
1958 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
1959 | if (nb_chan <= 0) { |
1960 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1961 | } | |
2f77fc4b DG |
1962 | break; |
1963 | default: | |
1964 | *channels = NULL; | |
f73fabfd | 1965 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1966 | goto error; |
1967 | } | |
1968 | ||
1969 | if (nb_chan > 0) { | |
1970 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
1971 | if (*channels == NULL) { | |
f73fabfd | 1972 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1973 | goto error; |
1974 | } | |
1975 | ||
1976 | list_lttng_channels(domain, session, *channels); | |
1977 | } else { | |
1978 | *channels = NULL; | |
c7d620a2 DG |
1979 | /* Ret value was set in the domain switch case */ |
1980 | goto error; | |
2f77fc4b DG |
1981 | } |
1982 | ||
1983 | return nb_chan; | |
1984 | ||
1985 | error: | |
f73fabfd DG |
1986 | /* Return negative value to differentiate return code */ |
1987 | return -ret; | |
2f77fc4b DG |
1988 | } |
1989 | ||
1990 | /* | |
1991 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
1992 | */ | |
1993 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
1994 | char *channel_name, struct lttng_event **events) | |
1995 | { | |
1996 | int ret = 0; | |
1997 | ssize_t nb_event = 0; | |
1998 | ||
1999 | switch (domain) { | |
2000 | case LTTNG_DOMAIN_KERNEL: | |
2001 | if (session->kernel_session != NULL) { | |
2002 | nb_event = list_lttng_kernel_events(channel_name, | |
2003 | session->kernel_session, events); | |
2004 | } | |
2005 | break; | |
2006 | case LTTNG_DOMAIN_UST: | |
2007 | { | |
2008 | if (session->ust_session != NULL) { | |
2009 | nb_event = list_lttng_ust_global_events(channel_name, | |
2010 | &session->ust_session->domain_global, events); | |
2011 | } | |
2012 | break; | |
2013 | } | |
2014 | default: | |
f73fabfd | 2015 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2016 | goto error; |
2017 | } | |
2018 | ||
f73fabfd | 2019 | return nb_event; |
2f77fc4b DG |
2020 | |
2021 | error: | |
f73fabfd DG |
2022 | /* Return negative value to differentiate return code */ |
2023 | return -ret; | |
2f77fc4b DG |
2024 | } |
2025 | ||
2026 | /* | |
2027 | * Using the session list, filled a lttng_session array to send back to the | |
2028 | * client for session listing. | |
2029 | * | |
2030 | * The session list lock MUST be acquired before calling this function. Use | |
2031 | * session_lock_list() and session_unlock_list(). | |
2032 | */ | |
2033 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2034 | gid_t gid) | |
2035 | { | |
2036 | int ret; | |
2037 | unsigned int i = 0; | |
2038 | struct ltt_session *session; | |
2039 | struct ltt_session_list *list = session_get_list(); | |
2040 | ||
2041 | DBG("Getting all available session for UID %d GID %d", | |
2042 | uid, gid); | |
2043 | /* | |
2044 | * Iterate over session list and append data after the control struct in | |
2045 | * the buffer. | |
2046 | */ | |
2047 | cds_list_for_each_entry(session, &list->head, list) { | |
2048 | /* | |
2049 | * Only list the sessions the user can control. | |
2050 | */ | |
2051 | if (!session_access_ok(session, uid, gid)) { | |
2052 | continue; | |
2053 | } | |
2054 | ||
2055 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2056 | struct ltt_ust_session *usess = session->ust_session; | |
2057 | ||
2058 | if (session->consumer->type == CONSUMER_DST_NET || | |
2059 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2060 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2061 | ret = build_network_session_path(sessions[i].path, | |
2062 | sizeof(session[i].path), session); | |
2063 | } else { | |
2064 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2065 | session->consumer->dst.trace_path); | |
2066 | } | |
2067 | if (ret < 0) { | |
2068 | PERROR("snprintf session path"); | |
2069 | continue; | |
2070 | } | |
2071 | ||
2072 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2073 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2074 | sessions[i].enabled = session->enabled; | |
2075 | i++; | |
2076 | } | |
2077 | } | |
2078 | ||
806e2684 | 2079 | /* |
6d805429 DG |
2080 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
2081 | * ready for trace analysis (or anykind of reader) or else 1 for pending data. | |
806e2684 | 2082 | */ |
6d805429 | 2083 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2084 | { |
2085 | int ret; | |
2086 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2087 | struct ltt_ust_session *usess = session->ust_session; | |
2088 | ||
2089 | assert(session); | |
2090 | ||
2091 | /* Session MUST be stopped to ask for data availability. */ | |
2092 | if (session->enabled) { | |
2093 | ret = LTTNG_ERR_SESSION_STARTED; | |
2094 | goto error; | |
2095 | } | |
2096 | ||
2097 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2098 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2099 | if (ret == 1) { | |
806e2684 DG |
2100 | /* Data is still being extracted for the kernel. */ |
2101 | goto error; | |
2102 | } | |
2103 | } | |
2104 | ||
2105 | if (usess && usess->consumer) { | |
6d805429 DG |
2106 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2107 | if (ret == 1) { | |
806e2684 DG |
2108 | /* Data is still being extracted for the kernel. */ |
2109 | goto error; | |
2110 | } | |
2111 | } | |
2112 | ||
2113 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2114 | ret = 0; |
806e2684 DG |
2115 | |
2116 | error: | |
2117 | return ret; | |
2118 | } | |
2119 | ||
2f77fc4b DG |
2120 | /* |
2121 | * Init command subsystem. | |
2122 | */ | |
2123 | void cmd_init(void) | |
2124 | { | |
2125 | /* | |
d88aee68 DG |
2126 | * Set network sequence index to 1 for streams to match a relayd |
2127 | * socket on the consumer side. | |
2f77fc4b | 2128 | */ |
d88aee68 DG |
2129 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
2130 | relayd_net_seq_idx = 1; | |
2131 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
2132 | |
2133 | DBG("Command subsystem initialized"); | |
2134 | } |