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 | */ | |
481 | static int create_connect_relayd(struct consumer_output *output, | |
482 | const char *session_name, struct lttng_uri *uri, | |
d4519fa3 JD |
483 | struct lttcomm_sock **relayd_sock, |
484 | struct ltt_session *session) | |
2f77fc4b DG |
485 | { |
486 | int ret; | |
487 | struct lttcomm_sock *sock; | |
d4519fa3 | 488 | uint32_t minor; |
2f77fc4b DG |
489 | |
490 | /* Create socket object from URI */ | |
491 | sock = lttcomm_alloc_sock_from_uri(uri); | |
492 | if (sock == NULL) { | |
f73fabfd | 493 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
494 | goto error; |
495 | } | |
496 | ||
497 | ret = lttcomm_create_sock(sock); | |
498 | if (ret < 0) { | |
f73fabfd | 499 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
500 | goto error; |
501 | } | |
502 | ||
ffe60014 DG |
503 | /* |
504 | * Connect to relayd so we can proceed with a session creation. This call | |
505 | * can possibly block for an arbitrary amount of time to set the health | |
506 | * state to be in poll execution. | |
507 | */ | |
508 | health_poll_entry(); | |
2f77fc4b | 509 | ret = relayd_connect(sock); |
ffe60014 | 510 | health_poll_exit(); |
2f77fc4b DG |
511 | if (ret < 0) { |
512 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 513 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
514 | goto free_sock; |
515 | } | |
516 | ||
517 | /* Create socket for control stream. */ | |
518 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
519 | DBG3("Creating relayd stream socket from URI"); | |
520 | ||
521 | /* Check relayd version */ | |
522 | ret = relayd_version_check(sock, RELAYD_VERSION_COMM_MAJOR, | |
d4519fa3 | 523 | RELAYD_VERSION_COMM_MINOR, &minor); |
2f77fc4b | 524 | if (ret < 0) { |
f73fabfd | 525 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
526 | goto close_sock; |
527 | } | |
d4519fa3 JD |
528 | session->major = RELAYD_VERSION_COMM_MAJOR; |
529 | session->minor = minor; | |
2f77fc4b DG |
530 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
531 | DBG3("Creating relayd data socket from URI"); | |
532 | } else { | |
533 | /* Command is not valid */ | |
534 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 535 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
536 | goto close_sock; |
537 | } | |
538 | ||
539 | *relayd_sock = sock; | |
540 | ||
f73fabfd | 541 | return LTTNG_OK; |
2f77fc4b DG |
542 | |
543 | close_sock: | |
544 | if (sock) { | |
545 | (void) relayd_close(sock); | |
546 | } | |
547 | free_sock: | |
548 | if (sock) { | |
549 | lttcomm_destroy_sock(sock); | |
550 | } | |
551 | error: | |
552 | return ret; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Connect to the relayd using URI and send the socket to the right consumer. | |
557 | */ | |
558 | static int send_consumer_relayd_socket(int domain, struct ltt_session *session, | |
559 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
f50f23d9 | 560 | struct consumer_socket *consumer_sock) |
2f77fc4b DG |
561 | { |
562 | int ret; | |
563 | struct lttcomm_sock *sock = NULL; | |
564 | ||
ffe60014 | 565 | /* Connect to relayd and make version check if uri is the control. */ |
d4519fa3 JD |
566 | ret = create_connect_relayd(consumer, session->name, relayd_uri, |
567 | &sock, session); | |
ffe60014 DG |
568 | if (ret != LTTNG_OK) { |
569 | goto close_sock; | |
570 | } | |
571 | ||
572 | /* If the control socket is connected, network session is ready */ | |
573 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
574 | session->net_handle = 1; | |
575 | } | |
576 | ||
2f77fc4b | 577 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
578 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
579 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
580 | /* |
581 | * Increment net_seq_idx because we are about to transfer the | |
582 | * new relayd socket to the consumer. | |
d88aee68 | 583 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 584 | */ |
d88aee68 DG |
585 | consumer->net_seq_index = ++relayd_net_seq_idx; |
586 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
587 | } |
588 | ||
2f77fc4b | 589 | /* Send relayd socket to consumer. */ |
f50f23d9 | 590 | ret = consumer_send_relayd_socket(consumer_sock, sock, |
46e6455f | 591 | consumer, relayd_uri->stype, session->id); |
2f77fc4b | 592 | if (ret < 0) { |
f73fabfd | 593 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
594 | goto close_sock; |
595 | } | |
596 | ||
c890b720 DG |
597 | /* Flag that the corresponding socket was sent. */ |
598 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 599 | consumer_sock->control_sock_sent = 1; |
c890b720 | 600 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 601 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
602 | } |
603 | ||
f73fabfd | 604 | ret = LTTNG_OK; |
2f77fc4b DG |
605 | |
606 | /* | |
607 | * Close socket which was dup on the consumer side. The session daemon does | |
608 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
609 | */ | |
610 | ||
611 | close_sock: | |
612 | if (sock) { | |
613 | (void) relayd_close(sock); | |
614 | lttcomm_destroy_sock(sock); | |
615 | } | |
616 | ||
ffe60014 DG |
617 | if (ret != LTTNG_OK) { |
618 | /* | |
619 | * On error, nullify the consumer sequence index so streams are not | |
620 | * associated with it once sent to the consumer. | |
621 | */ | |
622 | uatomic_set(&consumer->net_seq_index, -1); | |
623 | } | |
624 | ||
2f77fc4b DG |
625 | return ret; |
626 | } | |
627 | ||
628 | /* | |
629 | * Send both relayd sockets to a specific consumer and domain. This is a | |
630 | * helper function to facilitate sending the information to the consumer for a | |
631 | * session. | |
632 | */ | |
633 | static int send_consumer_relayd_sockets(int domain, | |
f50f23d9 DG |
634 | struct ltt_session *session, struct consumer_output *consumer, |
635 | struct consumer_socket *sock) | |
2f77fc4b | 636 | { |
dda67f6c | 637 | int ret = LTTNG_OK; |
2f77fc4b DG |
638 | |
639 | assert(session); | |
640 | assert(consumer); | |
641 | ||
2f77fc4b | 642 | /* Sending control relayd socket. */ |
ffe60014 | 643 | if (!sock->control_sock_sent) { |
c890b720 | 644 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 645 | &consumer->dst.net.control, consumer, sock); |
c890b720 DG |
646 | if (ret != LTTNG_OK) { |
647 | goto error; | |
648 | } | |
2f77fc4b DG |
649 | } |
650 | ||
651 | /* Sending data relayd socket. */ | |
ffe60014 | 652 | if (!sock->data_sock_sent) { |
c890b720 | 653 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 654 | &consumer->dst.net.data, consumer, sock); |
c890b720 DG |
655 | if (ret != LTTNG_OK) { |
656 | goto error; | |
657 | } | |
2f77fc4b DG |
658 | } |
659 | ||
2f77fc4b DG |
660 | error: |
661 | return ret; | |
662 | } | |
663 | ||
664 | /* | |
665 | * Setup relayd connections for a tracing session. First creates the socket to | |
666 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
667 | * network. | |
668 | */ | |
ffe60014 | 669 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 670 | { |
f73fabfd | 671 | int ret = LTTNG_OK; |
2f77fc4b DG |
672 | struct ltt_ust_session *usess; |
673 | struct ltt_kernel_session *ksess; | |
674 | struct consumer_socket *socket; | |
675 | struct lttng_ht_iter iter; | |
676 | ||
677 | assert(session); | |
678 | ||
679 | usess = session->ust_session; | |
680 | ksess = session->kernel_session; | |
681 | ||
785d2d0d | 682 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 683 | |
e7fe706f DG |
684 | rcu_read_lock(); |
685 | ||
2f77fc4b DG |
686 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
687 | && usess->consumer->enabled) { | |
688 | /* For each consumer socket, send relayd sockets */ | |
689 | cds_lfht_for_each_entry(usess->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_UST, session, |
f50f23d9 | 696 | usess->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 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
705 | && ksess->consumer->enabled) { | |
706 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
707 | socket, node.node) { | |
708 | /* Code flow error */ | |
709 | assert(socket->fd >= 0); | |
710 | ||
711 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 712 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session, |
f50f23d9 | 713 | ksess->consumer, socket); |
2f77fc4b | 714 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 715 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
716 | goto error; |
717 | } | |
718 | } | |
719 | } | |
720 | ||
721 | error: | |
e7fe706f | 722 | rcu_read_unlock(); |
2f77fc4b DG |
723 | return ret; |
724 | } | |
725 | ||
9b6c7ec5 DG |
726 | /* |
727 | * Start a kernel session by opening all necessary streams. | |
728 | */ | |
729 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
730 | { | |
731 | int ret; | |
732 | struct ltt_kernel_channel *kchan; | |
733 | ||
734 | /* Open kernel metadata */ | |
735 | if (ksess->metadata == NULL) { | |
736 | ret = kernel_open_metadata(ksess); | |
737 | if (ret < 0) { | |
738 | ret = LTTNG_ERR_KERN_META_FAIL; | |
739 | goto error; | |
740 | } | |
741 | } | |
742 | ||
743 | /* Open kernel metadata stream */ | |
744 | if (ksess->metadata_stream_fd < 0) { | |
745 | ret = kernel_open_metadata_stream(ksess); | |
746 | if (ret < 0) { | |
747 | ERR("Kernel create metadata stream failed"); | |
748 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
749 | goto error; | |
750 | } | |
751 | } | |
752 | ||
753 | /* For each channel */ | |
754 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
755 | if (kchan->stream_count == 0) { | |
756 | ret = kernel_open_channel_stream(kchan); | |
757 | if (ret < 0) { | |
758 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
759 | goto error; | |
760 | } | |
761 | /* Update the stream global counter */ | |
762 | ksess->stream_count_global += ret; | |
763 | } | |
764 | } | |
765 | ||
766 | /* Setup kernel consumer socket and send fds to it */ | |
767 | ret = init_kernel_tracing(ksess); | |
768 | if (ret < 0) { | |
769 | ret = LTTNG_ERR_KERN_START_FAIL; | |
770 | goto error; | |
771 | } | |
772 | ||
773 | /* This start the kernel tracing */ | |
774 | ret = kernel_start_session(ksess); | |
775 | if (ret < 0) { | |
776 | ret = LTTNG_ERR_KERN_START_FAIL; | |
777 | goto error; | |
778 | } | |
779 | ||
780 | /* Quiescent wait after starting trace */ | |
784303b0 | 781 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
782 | |
783 | ksess->started = 1; | |
784 | ||
785 | ret = LTTNG_OK; | |
786 | ||
787 | error: | |
788 | return ret; | |
789 | } | |
790 | ||
2f77fc4b DG |
791 | /* |
792 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
793 | */ | |
794 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
795 | char *channel_name) | |
796 | { | |
797 | int ret; | |
798 | struct ltt_ust_session *usess; | |
799 | ||
800 | usess = session->ust_session; | |
801 | ||
2223c96f DG |
802 | rcu_read_lock(); |
803 | ||
2f77fc4b DG |
804 | switch (domain) { |
805 | case LTTNG_DOMAIN_KERNEL: | |
806 | { | |
807 | ret = channel_kernel_disable(session->kernel_session, | |
808 | channel_name); | |
f73fabfd | 809 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
810 | goto error; |
811 | } | |
812 | ||
813 | kernel_wait_quiescent(kernel_tracer_fd); | |
814 | break; | |
815 | } | |
816 | case LTTNG_DOMAIN_UST: | |
817 | { | |
818 | struct ltt_ust_channel *uchan; | |
819 | struct lttng_ht *chan_ht; | |
820 | ||
821 | chan_ht = usess->domain_global.channels; | |
822 | ||
823 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
824 | if (uchan == NULL) { | |
f73fabfd | 825 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
826 | goto error; |
827 | } | |
828 | ||
7972aab2 | 829 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 830 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
831 | goto error; |
832 | } | |
833 | break; | |
834 | } | |
835 | #if 0 | |
836 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
837 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
838 | case LTTNG_DOMAIN_UST_PID: | |
839 | #endif | |
840 | default: | |
f73fabfd | 841 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
842 | goto error; |
843 | } | |
844 | ||
f73fabfd | 845 | ret = LTTNG_OK; |
2f77fc4b DG |
846 | |
847 | error: | |
2223c96f | 848 | rcu_read_unlock(); |
2f77fc4b DG |
849 | return ret; |
850 | } | |
851 | ||
852 | /* | |
853 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
854 | * | |
855 | * The wpipe arguments is used as a notifier for the kernel thread. | |
856 | */ | |
857 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 858 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
859 | { |
860 | int ret; | |
861 | struct ltt_ust_session *usess = session->ust_session; | |
862 | struct lttng_ht *chan_ht; | |
863 | ||
864 | assert(session); | |
865 | assert(attr); | |
7972aab2 | 866 | assert(domain); |
2f77fc4b DG |
867 | |
868 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
869 | ||
2223c96f DG |
870 | rcu_read_lock(); |
871 | ||
7972aab2 | 872 | switch (domain->type) { |
2f77fc4b DG |
873 | case LTTNG_DOMAIN_KERNEL: |
874 | { | |
875 | struct ltt_kernel_channel *kchan; | |
876 | ||
2f77fc4b DG |
877 | kchan = trace_kernel_get_channel_by_name(attr->name, |
878 | session->kernel_session); | |
879 | if (kchan == NULL) { | |
880 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
881 | } else { | |
882 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
883 | } | |
884 | ||
f73fabfd | 885 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
886 | goto error; |
887 | } | |
888 | ||
784303b0 | 889 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
890 | |
891 | /* | |
892 | * If the session was previously started, start as well this newly | |
893 | * created kernel session so the events/channels enabled *after* the | |
894 | * start actually work. | |
895 | */ | |
896 | if (session->started && !session->kernel_session->started) { | |
897 | ret = start_kernel_session(session->kernel_session, wpipe); | |
898 | if (ret != LTTNG_OK) { | |
899 | goto error; | |
900 | } | |
901 | } | |
2f77fc4b DG |
902 | break; |
903 | } | |
904 | case LTTNG_DOMAIN_UST: | |
905 | { | |
906 | struct ltt_ust_channel *uchan; | |
907 | ||
908 | chan_ht = usess->domain_global.channels; | |
909 | ||
910 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
911 | if (uchan == NULL) { | |
7972aab2 | 912 | ret = channel_ust_create(usess, attr, domain->buf_type); |
2f77fc4b | 913 | } else { |
7972aab2 | 914 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b | 915 | } |
9b6c7ec5 DG |
916 | |
917 | /* Start the UST session if the session was already started. */ | |
918 | if (session->started && !usess->start_trace) { | |
919 | ret = ust_app_start_trace_all(usess); | |
920 | if (ret < 0) { | |
921 | ret = LTTNG_ERR_UST_START_FAIL; | |
922 | goto error; | |
923 | } | |
924 | ret = LTTNG_OK; | |
925 | usess->start_trace = 1; | |
926 | } | |
2f77fc4b DG |
927 | break; |
928 | } | |
2f77fc4b | 929 | default: |
f73fabfd | 930 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
931 | goto error; |
932 | } | |
933 | ||
934 | error: | |
2223c96f | 935 | rcu_read_unlock(); |
2f77fc4b DG |
936 | return ret; |
937 | } | |
938 | ||
939 | ||
940 | /* | |
941 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
942 | */ | |
943 | int cmd_disable_event(struct ltt_session *session, int domain, | |
944 | char *channel_name, char *event_name) | |
945 | { | |
946 | int ret; | |
947 | ||
2223c96f DG |
948 | rcu_read_lock(); |
949 | ||
2f77fc4b DG |
950 | switch (domain) { |
951 | case LTTNG_DOMAIN_KERNEL: | |
952 | { | |
953 | struct ltt_kernel_channel *kchan; | |
954 | struct ltt_kernel_session *ksess; | |
955 | ||
956 | ksess = session->kernel_session; | |
957 | ||
958 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
959 | if (kchan == NULL) { | |
f73fabfd | 960 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
961 | goto error; |
962 | } | |
963 | ||
d3a56674 | 964 | ret = event_kernel_disable_tracepoint(kchan, event_name); |
f73fabfd | 965 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
966 | goto error; |
967 | } | |
968 | ||
969 | kernel_wait_quiescent(kernel_tracer_fd); | |
970 | break; | |
971 | } | |
972 | case LTTNG_DOMAIN_UST: | |
973 | { | |
974 | struct ltt_ust_channel *uchan; | |
975 | struct ltt_ust_session *usess; | |
976 | ||
977 | usess = session->ust_session; | |
978 | ||
979 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
980 | channel_name); | |
981 | if (uchan == NULL) { | |
f73fabfd | 982 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
983 | goto error; |
984 | } | |
985 | ||
7972aab2 | 986 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
f73fabfd | 987 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
988 | goto error; |
989 | } | |
990 | ||
991 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
992 | channel_name); | |
993 | break; | |
994 | } | |
995 | #if 0 | |
996 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
997 | case LTTNG_DOMAIN_UST_PID: | |
998 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
999 | #endif | |
1000 | default: | |
f73fabfd | 1001 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1002 | goto error; |
1003 | } | |
1004 | ||
f73fabfd | 1005 | ret = LTTNG_OK; |
2f77fc4b DG |
1006 | |
1007 | error: | |
2223c96f | 1008 | rcu_read_unlock(); |
2f77fc4b DG |
1009 | return ret; |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
1014 | */ | |
1015 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
1016 | char *channel_name) | |
1017 | { | |
1018 | int ret; | |
1019 | ||
2223c96f DG |
1020 | rcu_read_lock(); |
1021 | ||
2f77fc4b DG |
1022 | switch (domain) { |
1023 | case LTTNG_DOMAIN_KERNEL: | |
1024 | { | |
1025 | struct ltt_kernel_session *ksess; | |
1026 | struct ltt_kernel_channel *kchan; | |
1027 | ||
1028 | ksess = session->kernel_session; | |
1029 | ||
1030 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
1031 | if (kchan == NULL) { | |
f73fabfd | 1032 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1033 | goto error; |
1034 | } | |
1035 | ||
d3a56674 | 1036 | ret = event_kernel_disable_all(kchan); |
f73fabfd | 1037 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1038 | goto error; |
1039 | } | |
1040 | ||
1041 | kernel_wait_quiescent(kernel_tracer_fd); | |
1042 | break; | |
1043 | } | |
1044 | case LTTNG_DOMAIN_UST: | |
1045 | { | |
1046 | struct ltt_ust_session *usess; | |
1047 | struct ltt_ust_channel *uchan; | |
1048 | ||
1049 | usess = session->ust_session; | |
1050 | ||
1051 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1052 | channel_name); | |
1053 | if (uchan == NULL) { | |
f73fabfd | 1054 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1055 | goto error; |
1056 | } | |
1057 | ||
7972aab2 | 1058 | ret = event_ust_disable_all_tracepoints(usess, uchan); |
2f77fc4b DG |
1059 | if (ret != 0) { |
1060 | goto error; | |
1061 | } | |
1062 | ||
1063 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1064 | ||
1065 | break; | |
1066 | } | |
1067 | #if 0 | |
1068 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1069 | case LTTNG_DOMAIN_UST_PID: | |
1070 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1071 | #endif | |
1072 | default: | |
f73fabfd | 1073 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1074 | goto error; |
1075 | } | |
1076 | ||
f73fabfd | 1077 | ret = LTTNG_OK; |
2f77fc4b DG |
1078 | |
1079 | error: | |
2223c96f | 1080 | rcu_read_unlock(); |
2f77fc4b DG |
1081 | return ret; |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1086 | */ | |
1087 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1088 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b DG |
1089 | { |
1090 | int ret; | |
1091 | ||
1092 | switch (domain) { | |
1093 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1094 | assert(session->kernel_session); |
1095 | ||
1096 | if (session->kernel_session->channel_count == 0) { | |
1097 | /* Create default channel */ | |
1098 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1099 | if (ret != LTTNG_OK) { | |
1100 | goto error; | |
1101 | } | |
1102 | } | |
1103 | ||
2f77fc4b | 1104 | /* Add kernel context to kernel tracer */ |
601d5acf | 1105 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1106 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1107 | goto error; |
1108 | } | |
1109 | break; | |
1110 | case LTTNG_DOMAIN_UST: | |
1111 | { | |
1112 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
1113 | assert(usess); |
1114 | ||
979e618e DG |
1115 | unsigned int chan_count = |
1116 | lttng_ht_get_count(usess->domain_global.channels); | |
1117 | if (chan_count == 0) { | |
1118 | struct lttng_channel *attr; | |
1119 | /* Create default channel */ | |
1120 | attr = channel_new_default_attr(domain); | |
1121 | if (attr == NULL) { | |
1122 | ret = LTTNG_ERR_FATAL; | |
1123 | goto error; | |
1124 | } | |
1125 | ||
7972aab2 | 1126 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1127 | if (ret != LTTNG_OK) { |
1128 | free(attr); | |
1129 | goto error; | |
1130 | } | |
1131 | free(attr); | |
1132 | } | |
1133 | ||
601d5acf | 1134 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1135 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1136 | goto error; |
1137 | } | |
1138 | break; | |
1139 | } | |
1140 | #if 0 | |
1141 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1142 | case LTTNG_DOMAIN_UST_PID: | |
1143 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1144 | #endif | |
1145 | default: | |
f73fabfd | 1146 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1147 | goto error; |
1148 | } | |
1149 | ||
f73fabfd | 1150 | ret = LTTNG_OK; |
2f77fc4b DG |
1151 | |
1152 | error: | |
1153 | return ret; | |
1154 | } | |
1155 | ||
2f77fc4b DG |
1156 | /* |
1157 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1158 | */ | |
7972aab2 | 1159 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 DG |
1160 | char *channel_name, struct lttng_event *event, |
1161 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b | 1162 | { |
e5f5db7f | 1163 | int ret, channel_created = 0; |
2f77fc4b DG |
1164 | struct lttng_channel *attr; |
1165 | ||
1166 | assert(session); | |
1167 | assert(event); | |
1168 | assert(channel_name); | |
1169 | ||
2223c96f DG |
1170 | rcu_read_lock(); |
1171 | ||
7972aab2 | 1172 | switch (domain->type) { |
2f77fc4b DG |
1173 | case LTTNG_DOMAIN_KERNEL: |
1174 | { | |
1175 | struct ltt_kernel_channel *kchan; | |
1176 | ||
1177 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1178 | session->kernel_session); | |
1179 | if (kchan == NULL) { | |
7972aab2 | 1180 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL); |
2f77fc4b | 1181 | if (attr == NULL) { |
f73fabfd | 1182 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1183 | goto error; |
1184 | } | |
1185 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1186 | ||
1187 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1188 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1189 | free(attr); |
1190 | goto error; | |
1191 | } | |
1192 | free(attr); | |
e5f5db7f DG |
1193 | |
1194 | channel_created = 1; | |
2f77fc4b DG |
1195 | } |
1196 | ||
1197 | /* Get the newly created kernel channel pointer */ | |
1198 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1199 | session->kernel_session); | |
1200 | if (kchan == NULL) { | |
1201 | /* This sould not happen... */ | |
f73fabfd | 1202 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1203 | goto error; |
1204 | } | |
1205 | ||
d3a56674 | 1206 | ret = event_kernel_enable_tracepoint(kchan, event); |
f73fabfd | 1207 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1208 | if (channel_created) { |
1209 | /* Let's not leak a useless channel. */ | |
1210 | kernel_destroy_channel(kchan); | |
1211 | } | |
2f77fc4b DG |
1212 | goto error; |
1213 | } | |
1214 | ||
1215 | kernel_wait_quiescent(kernel_tracer_fd); | |
1216 | break; | |
1217 | } | |
1218 | case LTTNG_DOMAIN_UST: | |
1219 | { | |
1220 | struct ltt_ust_channel *uchan; | |
1221 | struct ltt_ust_session *usess = session->ust_session; | |
1222 | ||
1223 | assert(usess); | |
1224 | ||
1225 | /* Get channel from global UST domain */ | |
1226 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1227 | channel_name); | |
1228 | if (uchan == NULL) { | |
1229 | /* Create default channel */ | |
7972aab2 | 1230 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST); |
2f77fc4b | 1231 | if (attr == NULL) { |
f73fabfd | 1232 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1233 | goto error; |
1234 | } | |
1235 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1236 | ||
1237 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1238 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1239 | free(attr); |
1240 | goto error; | |
1241 | } | |
1242 | free(attr); | |
1243 | ||
1244 | /* Get the newly created channel reference back */ | |
1245 | uchan = trace_ust_find_channel_by_name( | |
1246 | usess->domain_global.channels, channel_name); | |
1247 | assert(uchan); | |
1248 | } | |
1249 | ||
1250 | /* At this point, the session and channel exist on the tracer */ | |
7972aab2 | 1251 | ret = event_ust_enable_tracepoint(usess, uchan, event, filter); |
f73fabfd | 1252 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1253 | goto error; |
1254 | } | |
1255 | break; | |
1256 | } | |
1257 | #if 0 | |
1258 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1259 | case LTTNG_DOMAIN_UST_PID: | |
1260 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1261 | #endif | |
1262 | default: | |
f73fabfd | 1263 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1264 | goto error; |
1265 | } | |
1266 | ||
f73fabfd | 1267 | ret = LTTNG_OK; |
2f77fc4b DG |
1268 | |
1269 | error: | |
2223c96f | 1270 | rcu_read_unlock(); |
2f77fc4b DG |
1271 | return ret; |
1272 | } | |
1273 | ||
1274 | /* | |
1275 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1276 | */ | |
7972aab2 DG |
1277 | int cmd_enable_event_all(struct ltt_session *session, |
1278 | struct lttng_domain *domain, char *channel_name, int event_type, | |
025faf73 | 1279 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1280 | { |
1281 | int ret; | |
1282 | struct lttng_channel *attr; | |
1283 | ||
1284 | assert(session); | |
1285 | assert(channel_name); | |
1286 | ||
2223c96f DG |
1287 | rcu_read_lock(); |
1288 | ||
7972aab2 | 1289 | switch (domain->type) { |
2f77fc4b DG |
1290 | case LTTNG_DOMAIN_KERNEL: |
1291 | { | |
1292 | struct ltt_kernel_channel *kchan; | |
1293 | ||
1294 | assert(session->kernel_session); | |
1295 | ||
1296 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1297 | session->kernel_session); | |
1298 | if (kchan == NULL) { | |
1299 | /* Create default channel */ | |
7972aab2 | 1300 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL); |
2f77fc4b | 1301 | if (attr == NULL) { |
f73fabfd | 1302 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1303 | goto error; |
1304 | } | |
1305 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1306 | ||
1307 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1308 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1309 | free(attr); |
1310 | goto error; | |
1311 | } | |
1312 | free(attr); | |
1313 | ||
1314 | /* Get the newly created kernel channel pointer */ | |
1315 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1316 | session->kernel_session); | |
1317 | assert(kchan); | |
1318 | } | |
1319 | ||
1320 | switch (event_type) { | |
1321 | case LTTNG_EVENT_SYSCALL: | |
d3a56674 | 1322 | ret = event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1323 | break; |
1324 | case LTTNG_EVENT_TRACEPOINT: | |
1325 | /* | |
1326 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1327 | * events already registered to the channel. | |
1328 | */ | |
d3a56674 | 1329 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1330 | break; |
1331 | case LTTNG_EVENT_ALL: | |
1332 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1333 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1334 | break; |
1335 | default: | |
f73fabfd | 1336 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1337 | goto error; |
1338 | } | |
1339 | ||
1340 | /* Manage return value */ | |
f73fabfd | 1341 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1342 | /* |
1343 | * On error, cmd_enable_channel call will take care of destroying | |
1344 | * the created channel if it was needed. | |
1345 | */ | |
2f77fc4b DG |
1346 | goto error; |
1347 | } | |
1348 | ||
1349 | kernel_wait_quiescent(kernel_tracer_fd); | |
1350 | break; | |
1351 | } | |
1352 | case LTTNG_DOMAIN_UST: | |
1353 | { | |
1354 | struct ltt_ust_channel *uchan; | |
1355 | struct ltt_ust_session *usess = session->ust_session; | |
1356 | ||
1357 | assert(usess); | |
1358 | ||
1359 | /* Get channel from global UST domain */ | |
1360 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1361 | channel_name); | |
1362 | if (uchan == NULL) { | |
1363 | /* Create default channel */ | |
7972aab2 | 1364 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST); |
2f77fc4b | 1365 | if (attr == NULL) { |
f73fabfd | 1366 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1367 | goto error; |
1368 | } | |
1369 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1370 | ||
1371 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1372 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1373 | free(attr); |
1374 | goto error; | |
1375 | } | |
1376 | free(attr); | |
1377 | ||
1378 | /* Get the newly created channel reference back */ | |
1379 | uchan = trace_ust_find_channel_by_name( | |
1380 | usess->domain_global.channels, channel_name); | |
1381 | assert(uchan); | |
1382 | } | |
1383 | ||
1384 | /* At this point, the session and channel exist on the tracer */ | |
1385 | ||
1386 | switch (event_type) { | |
1387 | case LTTNG_EVENT_ALL: | |
1388 | case LTTNG_EVENT_TRACEPOINT: | |
7972aab2 | 1389 | ret = event_ust_enable_all_tracepoints(usess, uchan, filter); |
f73fabfd | 1390 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1391 | goto error; |
1392 | } | |
1393 | break; | |
1394 | default: | |
f73fabfd | 1395 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1396 | goto error; |
1397 | } | |
1398 | ||
1399 | /* Manage return value */ | |
f73fabfd | 1400 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1401 | goto error; |
1402 | } | |
1403 | ||
1404 | break; | |
1405 | } | |
1406 | #if 0 | |
1407 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1408 | case LTTNG_DOMAIN_UST_PID: | |
1409 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1410 | #endif | |
1411 | default: | |
f73fabfd | 1412 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1413 | goto error; |
1414 | } | |
1415 | ||
f73fabfd | 1416 | ret = LTTNG_OK; |
2f77fc4b DG |
1417 | |
1418 | error: | |
2223c96f | 1419 | rcu_read_unlock(); |
2f77fc4b DG |
1420 | return ret; |
1421 | } | |
1422 | ||
1423 | ||
1424 | /* | |
1425 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1426 | */ | |
1427 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1428 | { | |
1429 | int ret; | |
1430 | ssize_t nb_events = 0; | |
1431 | ||
1432 | switch (domain) { | |
1433 | case LTTNG_DOMAIN_KERNEL: | |
1434 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1435 | if (nb_events < 0) { | |
f73fabfd | 1436 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1437 | goto error; |
1438 | } | |
1439 | break; | |
1440 | case LTTNG_DOMAIN_UST: | |
1441 | nb_events = ust_app_list_events(events); | |
1442 | if (nb_events < 0) { | |
f73fabfd | 1443 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1444 | goto error; |
1445 | } | |
1446 | break; | |
1447 | default: | |
f73fabfd | 1448 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1449 | goto error; |
1450 | } | |
1451 | ||
1452 | return nb_events; | |
1453 | ||
1454 | error: | |
1455 | /* Return negative value to differentiate return code */ | |
1456 | return -ret; | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1461 | */ | |
1462 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1463 | struct lttng_event_field **fields) | |
1464 | { | |
1465 | int ret; | |
1466 | ssize_t nb_fields = 0; | |
1467 | ||
1468 | switch (domain) { | |
1469 | case LTTNG_DOMAIN_UST: | |
1470 | nb_fields = ust_app_list_event_fields(fields); | |
1471 | if (nb_fields < 0) { | |
f73fabfd | 1472 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1473 | goto error; |
1474 | } | |
1475 | break; | |
1476 | case LTTNG_DOMAIN_KERNEL: | |
1477 | default: /* fall-through */ | |
f73fabfd | 1478 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1479 | goto error; |
1480 | } | |
1481 | ||
1482 | return nb_fields; | |
1483 | ||
1484 | error: | |
1485 | /* Return negative value to differentiate return code */ | |
1486 | return -ret; | |
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * Command LTTNG_START_TRACE processed by the client thread. | |
1491 | */ | |
1492 | int cmd_start_trace(struct ltt_session *session) | |
1493 | { | |
1494 | int ret; | |
1495 | struct ltt_kernel_session *ksession; | |
1496 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1497 | |
1498 | assert(session); | |
1499 | ||
1500 | /* Ease our life a bit ;) */ | |
1501 | ksession = session->kernel_session; | |
1502 | usess = session->ust_session; | |
1503 | ||
1504 | if (session->enabled) { | |
1505 | /* Already started. */ | |
f73fabfd | 1506 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1507 | goto error; |
1508 | } | |
1509 | ||
1510 | session->enabled = 1; | |
1511 | ||
2f77fc4b DG |
1512 | /* Kernel tracing */ |
1513 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1514 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1515 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1516 | goto error; |
1517 | } | |
2f77fc4b DG |
1518 | } |
1519 | ||
1520 | /* Flag session that trace should start automatically */ | |
1521 | if (usess) { | |
1522 | usess->start_trace = 1; | |
1523 | ||
1524 | ret = ust_app_start_trace_all(usess); | |
1525 | if (ret < 0) { | |
f73fabfd | 1526 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1527 | goto error; |
1528 | } | |
1529 | } | |
1530 | ||
9b6c7ec5 DG |
1531 | session->started = 1; |
1532 | ||
f73fabfd | 1533 | ret = LTTNG_OK; |
2f77fc4b DG |
1534 | |
1535 | error: | |
1536 | return ret; | |
1537 | } | |
1538 | ||
1539 | /* | |
1540 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1541 | */ | |
1542 | int cmd_stop_trace(struct ltt_session *session) | |
1543 | { | |
1544 | int ret; | |
1545 | struct ltt_kernel_channel *kchan; | |
1546 | struct ltt_kernel_session *ksession; | |
1547 | struct ltt_ust_session *usess; | |
1548 | ||
1549 | assert(session); | |
1550 | ||
1551 | /* Short cut */ | |
1552 | ksession = session->kernel_session; | |
1553 | usess = session->ust_session; | |
1554 | ||
1555 | if (!session->enabled) { | |
f73fabfd | 1556 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1557 | goto error; |
1558 | } | |
1559 | ||
1560 | session->enabled = 0; | |
1561 | ||
1562 | /* Kernel tracer */ | |
1563 | if (ksession) { | |
1564 | DBG("Stop kernel tracing"); | |
1565 | ||
1566 | /* Flush metadata if exist */ | |
1567 | if (ksession->metadata_stream_fd >= 0) { | |
1568 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1569 | if (ret < 0) { | |
1570 | ERR("Kernel metadata flush failed"); | |
1571 | } | |
1572 | } | |
1573 | ||
1574 | /* Flush all buffers before stopping */ | |
1575 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1576 | ret = kernel_flush_buffer(kchan); | |
1577 | if (ret < 0) { | |
1578 | ERR("Kernel flush buffer error"); | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | ret = kernel_stop_session(ksession); | |
1583 | if (ret < 0) { | |
f73fabfd | 1584 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1585 | goto error; |
1586 | } | |
1587 | ||
1588 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 DG |
1589 | |
1590 | ksession->started = 0; | |
2f77fc4b DG |
1591 | } |
1592 | ||
1593 | if (usess) { | |
1594 | usess->start_trace = 0; | |
1595 | ||
1596 | ret = ust_app_stop_trace_all(usess); | |
1597 | if (ret < 0) { | |
f73fabfd | 1598 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1599 | goto error; |
1600 | } | |
1601 | } | |
1602 | ||
9b6c7ec5 DG |
1603 | session->started = 0; |
1604 | ||
f73fabfd | 1605 | ret = LTTNG_OK; |
2f77fc4b DG |
1606 | |
1607 | error: | |
1608 | return ret; | |
1609 | } | |
1610 | ||
1611 | /* | |
1612 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1613 | */ | |
1614 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1615 | size_t nb_uri, struct lttng_uri *uris) | |
1616 | { | |
1617 | int ret, i; | |
1618 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1619 | struct ltt_ust_session *usess = session->ust_session; | |
1620 | struct consumer_output *consumer = NULL; | |
1621 | ||
1622 | assert(session); | |
1623 | assert(uris); | |
1624 | assert(nb_uri > 0); | |
1625 | ||
1626 | /* Can't enable consumer after session started. */ | |
1627 | if (session->enabled) { | |
f73fabfd | 1628 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1629 | goto error; |
1630 | } | |
1631 | ||
2f77fc4b DG |
1632 | /* |
1633 | * This case switch makes sure the domain session has a temporary consumer | |
1634 | * so the URL can be set. | |
1635 | */ | |
1636 | switch (domain) { | |
1637 | case 0: | |
1638 | /* Code flow error. A session MUST always have a consumer object */ | |
1639 | assert(session->consumer); | |
1640 | /* | |
1641 | * The URL will be added to the tracing session consumer instead of a | |
1642 | * specific domain consumer. | |
1643 | */ | |
1644 | consumer = session->consumer; | |
1645 | break; | |
1646 | case LTTNG_DOMAIN_KERNEL: | |
1647 | /* Code flow error if we don't have a kernel session here. */ | |
1648 | assert(ksess); | |
785d2d0d DG |
1649 | assert(ksess->consumer); |
1650 | consumer = ksess->consumer; | |
2f77fc4b DG |
1651 | break; |
1652 | case LTTNG_DOMAIN_UST: | |
1653 | /* Code flow error if we don't have a kernel session here. */ | |
1654 | assert(usess); | |
785d2d0d DG |
1655 | assert(usess->consumer); |
1656 | consumer = usess->consumer; | |
2f77fc4b DG |
1657 | break; |
1658 | } | |
1659 | ||
1660 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b DG |
1661 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
1662 | if (ret < 0) { | |
1663 | goto error; | |
1664 | } | |
2f77fc4b DG |
1665 | } |
1666 | ||
1667 | /* All good! */ | |
f73fabfd | 1668 | ret = LTTNG_OK; |
2f77fc4b DG |
1669 | |
1670 | error: | |
1671 | return ret; | |
1672 | } | |
1673 | ||
1674 | /* | |
1675 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1676 | */ | |
1677 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
1678 | size_t nb_uri, lttng_sock_cred *creds) | |
1679 | { | |
1680 | int ret; | |
1681 | char *path = NULL; | |
1682 | struct ltt_session *session; | |
1683 | ||
1684 | assert(name); | |
1685 | ||
785d2d0d DG |
1686 | /* No URIs is not possible. */ |
1687 | if (uris == NULL) { | |
1688 | ret = LTTNG_ERR_SESSION_FAIL; | |
1689 | goto session_error; | |
1690 | } | |
1691 | ||
2f77fc4b DG |
1692 | /* |
1693 | * Verify if the session already exist | |
1694 | * | |
1695 | * XXX: There is no need for the session lock list here since the caller | |
1696 | * (process_client_msg) is holding it. We might want to change that so a | |
1697 | * single command does not lock the entire session list. | |
1698 | */ | |
1699 | session = session_find_by_name(name); | |
1700 | if (session != NULL) { | |
f73fabfd | 1701 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1702 | goto find_error; |
1703 | } | |
1704 | ||
1705 | /* Create tracing session in the registry */ | |
1706 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), | |
1707 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
f73fabfd | 1708 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1709 | goto session_error; |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * Get the newly created session pointer back | |
1714 | * | |
1715 | * XXX: There is no need for the session lock list here since the caller | |
1716 | * (process_client_msg) is holding it. We might want to change that so a | |
1717 | * single command does not lock the entire session list. | |
1718 | */ | |
1719 | session = session_find_by_name(name); | |
1720 | assert(session); | |
1721 | ||
1722 | /* Create default consumer output for the session not yet created. */ | |
1723 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1724 | if (session->consumer == NULL) { | |
f73fabfd | 1725 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1726 | goto consumer_error; |
1727 | } | |
1728 | ||
2f77fc4b | 1729 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); |
f73fabfd | 1730 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1731 | goto consumer_error; |
1732 | } | |
1733 | ||
1734 | session->consumer->enabled = 1; | |
1735 | ||
f73fabfd | 1736 | return LTTNG_OK; |
2f77fc4b DG |
1737 | |
1738 | consumer_error: | |
1739 | session_destroy(session); | |
1740 | session_error: | |
1741 | find_error: | |
1742 | return ret; | |
1743 | } | |
1744 | ||
1745 | /* | |
1746 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1747 | */ | |
1748 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1749 | { | |
1750 | int ret; | |
1751 | struct ltt_ust_session *usess; | |
1752 | struct ltt_kernel_session *ksess; | |
1753 | ||
1754 | /* Safety net */ | |
1755 | assert(session); | |
1756 | ||
1757 | usess = session->ust_session; | |
1758 | ksess = session->kernel_session; | |
1759 | ||
1760 | /* Clean kernel session teardown */ | |
1761 | kernel_destroy_session(ksess); | |
1762 | ||
1763 | /* UST session teardown */ | |
1764 | if (usess) { | |
1765 | /* Close any relayd session */ | |
1766 | consumer_output_send_destroy_relayd(usess->consumer); | |
1767 | ||
1768 | /* Destroy every UST application related to this session. */ | |
1769 | ret = ust_app_destroy_trace_all(usess); | |
1770 | if (ret) { | |
1771 | ERR("Error in ust_app_destroy_trace_all"); | |
1772 | } | |
1773 | ||
1774 | /* Clean up the rest. */ | |
1775 | trace_ust_destroy_session(usess); | |
1776 | } | |
1777 | ||
1778 | /* | |
1779 | * Must notify the kernel thread here to update it's poll set in order to | |
1780 | * remove the channel(s)' fd just destroyed. | |
1781 | */ | |
1782 | ret = notify_thread_pipe(wpipe); | |
1783 | if (ret < 0) { | |
1784 | PERROR("write kernel poll pipe"); | |
1785 | } | |
1786 | ||
1787 | ret = session_destroy(session); | |
1788 | ||
1789 | return ret; | |
1790 | } | |
1791 | ||
1792 | /* | |
1793 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1794 | */ | |
1795 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1796 | { | |
1797 | int ret; | |
1798 | ||
1799 | switch (domain) { | |
1800 | case LTTNG_DOMAIN_KERNEL: | |
1801 | { | |
1802 | struct lttng_kernel_calibrate kcalibrate; | |
1803 | ||
1804 | kcalibrate.type = calibrate->type; | |
1805 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1806 | if (ret < 0) { | |
f73fabfd | 1807 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1808 | goto error; |
1809 | } | |
1810 | break; | |
1811 | } | |
1812 | case LTTNG_DOMAIN_UST: | |
1813 | { | |
1814 | struct lttng_ust_calibrate ucalibrate; | |
1815 | ||
1816 | ucalibrate.type = calibrate->type; | |
1817 | ret = ust_app_calibrate_glb(&ucalibrate); | |
1818 | if (ret < 0) { | |
f73fabfd | 1819 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
1820 | goto error; |
1821 | } | |
1822 | break; | |
1823 | } | |
1824 | default: | |
f73fabfd | 1825 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1826 | goto error; |
1827 | } | |
1828 | ||
f73fabfd | 1829 | ret = LTTNG_OK; |
2f77fc4b DG |
1830 | |
1831 | error: | |
1832 | return ret; | |
1833 | } | |
1834 | ||
1835 | /* | |
1836 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
1837 | */ | |
1838 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
1839 | const char *sock_path, struct consumer_data *cdata) | |
1840 | { | |
1841 | int ret, sock; | |
1842 | struct consumer_socket *socket; | |
1843 | ||
1844 | assert(session); | |
1845 | assert(cdata); | |
1846 | assert(sock_path); | |
1847 | ||
1848 | switch (domain) { | |
1849 | case LTTNG_DOMAIN_KERNEL: | |
1850 | { | |
1851 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1852 | ||
1853 | assert(ksess); | |
1854 | ||
1855 | /* Can't register a consumer if there is already one */ | |
1856 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 1857 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
1858 | goto error; |
1859 | } | |
1860 | ||
1861 | sock = lttcomm_connect_unix_sock(sock_path); | |
1862 | if (sock < 0) { | |
f73fabfd | 1863 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
1864 | goto error; |
1865 | } | |
1866 | ||
1867 | socket = consumer_allocate_socket(sock); | |
1868 | if (socket == NULL) { | |
f66c074c DG |
1869 | ret = close(sock); |
1870 | if (ret < 0) { | |
1871 | PERROR("close register consumer"); | |
1872 | } | |
f73fabfd | 1873 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1874 | goto error; |
1875 | } | |
1876 | ||
1877 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
1878 | if (socket->lock == NULL) { | |
1879 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 1880 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1881 | goto error; |
1882 | } | |
1883 | pthread_mutex_init(socket->lock, NULL); | |
1884 | socket->registered = 1; | |
1885 | ||
1886 | rcu_read_lock(); | |
1887 | consumer_add_socket(socket, ksess->consumer); | |
1888 | rcu_read_unlock(); | |
1889 | ||
1890 | pthread_mutex_lock(&cdata->pid_mutex); | |
1891 | cdata->pid = -1; | |
1892 | pthread_mutex_unlock(&cdata->pid_mutex); | |
1893 | ||
1894 | break; | |
1895 | } | |
1896 | default: | |
1897 | /* TODO: Userspace tracing */ | |
f73fabfd | 1898 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1899 | goto error; |
1900 | } | |
1901 | ||
f73fabfd | 1902 | ret = LTTNG_OK; |
2f77fc4b DG |
1903 | |
1904 | error: | |
1905 | return ret; | |
1906 | } | |
1907 | ||
1908 | /* | |
1909 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
1910 | */ | |
1911 | ssize_t cmd_list_domains(struct ltt_session *session, | |
1912 | struct lttng_domain **domains) | |
1913 | { | |
1914 | int ret, index = 0; | |
1915 | ssize_t nb_dom = 0; | |
1916 | ||
1917 | if (session->kernel_session != NULL) { | |
1918 | DBG3("Listing domains found kernel domain"); | |
1919 | nb_dom++; | |
1920 | } | |
1921 | ||
1922 | if (session->ust_session != NULL) { | |
1923 | DBG3("Listing domains found UST global domain"); | |
1924 | nb_dom++; | |
1925 | } | |
1926 | ||
1927 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
1928 | if (*domains == NULL) { | |
f73fabfd | 1929 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1930 | goto error; |
1931 | } | |
1932 | ||
1933 | if (session->kernel_session != NULL) { | |
1934 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
1935 | index++; | |
1936 | } | |
1937 | ||
1938 | if (session->ust_session != NULL) { | |
1939 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
1940 | index++; | |
1941 | } | |
1942 | ||
1943 | return nb_dom; | |
1944 | ||
1945 | error: | |
f73fabfd DG |
1946 | /* Return negative value to differentiate return code */ |
1947 | return -ret; | |
2f77fc4b DG |
1948 | } |
1949 | ||
1950 | ||
1951 | /* | |
1952 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
1953 | */ | |
1954 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
1955 | struct lttng_channel **channels) | |
1956 | { | |
1957 | int ret; | |
1958 | ssize_t nb_chan = 0; | |
1959 | ||
1960 | switch (domain) { | |
1961 | case LTTNG_DOMAIN_KERNEL: | |
1962 | if (session->kernel_session != NULL) { | |
1963 | nb_chan = session->kernel_session->channel_count; | |
1964 | } | |
1965 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
1966 | if (nb_chan <= 0) { |
1967 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
1968 | } | |
2f77fc4b DG |
1969 | break; |
1970 | case LTTNG_DOMAIN_UST: | |
1971 | if (session->ust_session != NULL) { | |
1972 | nb_chan = lttng_ht_get_count( | |
1973 | session->ust_session->domain_global.channels); | |
1974 | } | |
1975 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
1976 | if (nb_chan <= 0) { |
1977 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1978 | } | |
2f77fc4b DG |
1979 | break; |
1980 | default: | |
1981 | *channels = NULL; | |
f73fabfd | 1982 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1983 | goto error; |
1984 | } | |
1985 | ||
1986 | if (nb_chan > 0) { | |
1987 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
1988 | if (*channels == NULL) { | |
f73fabfd | 1989 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1990 | goto error; |
1991 | } | |
1992 | ||
1993 | list_lttng_channels(domain, session, *channels); | |
1994 | } else { | |
1995 | *channels = NULL; | |
c7d620a2 DG |
1996 | /* Ret value was set in the domain switch case */ |
1997 | goto error; | |
2f77fc4b DG |
1998 | } |
1999 | ||
2000 | return nb_chan; | |
2001 | ||
2002 | error: | |
f73fabfd DG |
2003 | /* Return negative value to differentiate return code */ |
2004 | return -ret; | |
2f77fc4b DG |
2005 | } |
2006 | ||
2007 | /* | |
2008 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2009 | */ | |
2010 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2011 | char *channel_name, struct lttng_event **events) | |
2012 | { | |
2013 | int ret = 0; | |
2014 | ssize_t nb_event = 0; | |
2015 | ||
2016 | switch (domain) { | |
2017 | case LTTNG_DOMAIN_KERNEL: | |
2018 | if (session->kernel_session != NULL) { | |
2019 | nb_event = list_lttng_kernel_events(channel_name, | |
2020 | session->kernel_session, events); | |
2021 | } | |
2022 | break; | |
2023 | case LTTNG_DOMAIN_UST: | |
2024 | { | |
2025 | if (session->ust_session != NULL) { | |
2026 | nb_event = list_lttng_ust_global_events(channel_name, | |
2027 | &session->ust_session->domain_global, events); | |
2028 | } | |
2029 | break; | |
2030 | } | |
2031 | default: | |
f73fabfd | 2032 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2033 | goto error; |
2034 | } | |
2035 | ||
f73fabfd | 2036 | return nb_event; |
2f77fc4b DG |
2037 | |
2038 | error: | |
f73fabfd DG |
2039 | /* Return negative value to differentiate return code */ |
2040 | return -ret; | |
2f77fc4b DG |
2041 | } |
2042 | ||
2043 | /* | |
2044 | * Using the session list, filled a lttng_session array to send back to the | |
2045 | * client for session listing. | |
2046 | * | |
2047 | * The session list lock MUST be acquired before calling this function. Use | |
2048 | * session_lock_list() and session_unlock_list(). | |
2049 | */ | |
2050 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2051 | gid_t gid) | |
2052 | { | |
2053 | int ret; | |
2054 | unsigned int i = 0; | |
2055 | struct ltt_session *session; | |
2056 | struct ltt_session_list *list = session_get_list(); | |
2057 | ||
2058 | DBG("Getting all available session for UID %d GID %d", | |
2059 | uid, gid); | |
2060 | /* | |
2061 | * Iterate over session list and append data after the control struct in | |
2062 | * the buffer. | |
2063 | */ | |
2064 | cds_list_for_each_entry(session, &list->head, list) { | |
2065 | /* | |
2066 | * Only list the sessions the user can control. | |
2067 | */ | |
2068 | if (!session_access_ok(session, uid, gid)) { | |
2069 | continue; | |
2070 | } | |
2071 | ||
2072 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2073 | struct ltt_ust_session *usess = session->ust_session; | |
2074 | ||
2075 | if (session->consumer->type == CONSUMER_DST_NET || | |
2076 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2077 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2078 | ret = build_network_session_path(sessions[i].path, | |
2079 | sizeof(session[i].path), session); | |
2080 | } else { | |
2081 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2082 | session->consumer->dst.trace_path); | |
2083 | } | |
2084 | if (ret < 0) { | |
2085 | PERROR("snprintf session path"); | |
2086 | continue; | |
2087 | } | |
2088 | ||
2089 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2090 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2091 | sessions[i].enabled = session->enabled; | |
2092 | i++; | |
2093 | } | |
2094 | } | |
2095 | ||
806e2684 | 2096 | /* |
6d805429 DG |
2097 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
2098 | * ready for trace analysis (or anykind of reader) or else 1 for pending data. | |
806e2684 | 2099 | */ |
6d805429 | 2100 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2101 | { |
2102 | int ret; | |
2103 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2104 | struct ltt_ust_session *usess = session->ust_session; | |
2105 | ||
2106 | assert(session); | |
2107 | ||
2108 | /* Session MUST be stopped to ask for data availability. */ | |
2109 | if (session->enabled) { | |
2110 | ret = LTTNG_ERR_SESSION_STARTED; | |
2111 | goto error; | |
2112 | } | |
2113 | ||
2114 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2115 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2116 | if (ret == 1) { | |
806e2684 DG |
2117 | /* Data is still being extracted for the kernel. */ |
2118 | goto error; | |
2119 | } | |
2120 | } | |
2121 | ||
2122 | if (usess && usess->consumer) { | |
6d805429 DG |
2123 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2124 | if (ret == 1) { | |
806e2684 DG |
2125 | /* Data is still being extracted for the kernel. */ |
2126 | goto error; | |
2127 | } | |
2128 | } | |
2129 | ||
2130 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2131 | ret = 0; |
806e2684 DG |
2132 | |
2133 | error: | |
2134 | return ret; | |
2135 | } | |
2136 | ||
2f77fc4b DG |
2137 | /* |
2138 | * Init command subsystem. | |
2139 | */ | |
2140 | void cmd_init(void) | |
2141 | { | |
2142 | /* | |
d88aee68 DG |
2143 | * Set network sequence index to 1 for streams to match a relayd |
2144 | * socket on the consumer side. | |
2f77fc4b | 2145 | */ |
d88aee68 DG |
2146 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
2147 | relayd_net_seq_idx = 1; | |
2148 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
2149 | |
2150 | DBG("Command subsystem initialized"); | |
2151 | } |