Commit | Line | Data |
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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 | ||
df75acac DG |
383 | if (consumer->type == CONSUMER_DST_NET) { |
384 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
385 | consumer->dst.net.control_isset) || |
386 | (uri->stype == LTTNG_STREAM_DATA && | |
387 | consumer->dst.net.data_isset)) { | |
df75acac DG |
388 | ret = LTTNG_ERR_URL_EXIST; |
389 | goto error; | |
390 | } | |
391 | } else { | |
392 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
393 | } |
394 | ||
df75acac DG |
395 | consumer->type = CONSUMER_DST_NET; |
396 | ||
2f77fc4b DG |
397 | /* Set URI into consumer output object */ |
398 | ret = consumer_set_network_uri(consumer, uri); | |
399 | if (ret < 0) { | |
f73fabfd | 400 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
401 | goto error; |
402 | } else if (ret == 1) { | |
403 | /* | |
404 | * URI was the same in the consumer so we do not append the subdir | |
405 | * again so to not duplicate output dir. | |
406 | */ | |
407 | goto error; | |
408 | } | |
409 | ||
410 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
411 | ret = consumer_set_subdir(consumer, session_name); | |
412 | if (ret < 0) { | |
f73fabfd | 413 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
414 | goto error; |
415 | } | |
416 | } | |
417 | ||
418 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
419 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
420 | strncat(consumer->subdir, default_trace_dir, |
421 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
422 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
423 | } | |
424 | ||
425 | break; | |
426 | case LTTNG_DST_PATH: | |
427 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
428 | memset(consumer->dst.trace_path, 0, | |
429 | sizeof(consumer->dst.trace_path)); | |
430 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
431 | sizeof(consumer->dst.trace_path)); | |
432 | /* Append default trace dir */ | |
433 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
434 | sizeof(consumer->dst.trace_path) - |
435 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
436 | /* Flag consumer as local. */ |
437 | consumer->type = CONSUMER_DST_LOCAL; | |
438 | break; | |
439 | } | |
440 | ||
441 | error: | |
442 | return ret; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
447 | */ | |
448 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
449 | { | |
450 | int ret = 0; | |
451 | struct lttng_ht_iter iter; | |
452 | struct consumer_socket *socket; | |
453 | ||
454 | assert(session); | |
455 | ||
e7fe706f DG |
456 | rcu_read_lock(); |
457 | ||
2f77fc4b DG |
458 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
459 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
460 | socket, node.node) { | |
461 | /* Code flow error */ | |
462 | assert(socket->fd >= 0); | |
463 | ||
464 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 465 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
466 | pthread_mutex_unlock(socket->lock); |
467 | if (ret < 0) { | |
f73fabfd | 468 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
469 | goto error; |
470 | } | |
471 | } | |
472 | } | |
473 | ||
474 | error: | |
e7fe706f | 475 | rcu_read_unlock(); |
2f77fc4b DG |
476 | return ret; |
477 | } | |
478 | ||
479 | /* | |
480 | * Create a socket to the relayd using the URI. | |
481 | * | |
482 | * On success, the relayd_sock pointer is set to the created socket. | |
483 | * Else, it's stays untouched and a lttcomm error code is returned. | |
484 | */ | |
6151a90f JD |
485 | static int create_connect_relayd(struct lttng_uri *uri, |
486 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
487 | { |
488 | int ret; | |
6151a90f | 489 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 490 | |
6151a90f JD |
491 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
492 | RELAYD_VERSION_COMM_MINOR); | |
493 | if (!rsock) { | |
f73fabfd | 494 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
495 | goto error; |
496 | } | |
497 | ||
ffe60014 DG |
498 | /* |
499 | * Connect to relayd so we can proceed with a session creation. This call | |
500 | * can possibly block for an arbitrary amount of time to set the health | |
501 | * state to be in poll execution. | |
502 | */ | |
503 | health_poll_entry(); | |
6151a90f | 504 | ret = relayd_connect(rsock); |
ffe60014 | 505 | health_poll_exit(); |
2f77fc4b DG |
506 | if (ret < 0) { |
507 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 508 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
509 | goto free_sock; |
510 | } | |
511 | ||
512 | /* Create socket for control stream. */ | |
513 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
514 | DBG3("Creating relayd stream socket from URI"); | |
515 | ||
516 | /* Check relayd version */ | |
6151a90f | 517 | ret = relayd_version_check(rsock); |
2f77fc4b | 518 | if (ret < 0) { |
f73fabfd | 519 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
520 | goto close_sock; |
521 | } | |
522 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
523 | DBG3("Creating relayd data socket from URI"); | |
524 | } else { | |
525 | /* Command is not valid */ | |
526 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 527 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
528 | goto close_sock; |
529 | } | |
530 | ||
6151a90f | 531 | *relayd_sock = rsock; |
2f77fc4b | 532 | |
f73fabfd | 533 | return LTTNG_OK; |
2f77fc4b DG |
534 | |
535 | close_sock: | |
6151a90f JD |
536 | /* The returned value is not useful since we are on an error path. */ |
537 | (void) relayd_close(rsock); | |
2f77fc4b | 538 | free_sock: |
6151a90f | 539 | free(rsock); |
2f77fc4b DG |
540 | error: |
541 | return ret; | |
542 | } | |
543 | ||
544 | /* | |
545 | * Connect to the relayd using URI and send the socket to the right consumer. | |
546 | */ | |
547 | static int send_consumer_relayd_socket(int domain, struct ltt_session *session, | |
548 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
f50f23d9 | 549 | struct consumer_socket *consumer_sock) |
2f77fc4b DG |
550 | { |
551 | int ret; | |
6151a90f | 552 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 553 | |
ffe60014 | 554 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 555 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 556 | if (ret != LTTNG_OK) { |
6151a90f | 557 | goto error; |
ffe60014 | 558 | } |
6151a90f | 559 | assert(rsock); |
ffe60014 DG |
560 | |
561 | /* If the control socket is connected, network session is ready */ | |
562 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
563 | session->net_handle = 1; | |
564 | } | |
565 | ||
2f77fc4b | 566 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
567 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
568 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
569 | /* |
570 | * Increment net_seq_idx because we are about to transfer the | |
571 | * new relayd socket to the consumer. | |
d88aee68 | 572 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 573 | */ |
d88aee68 DG |
574 | consumer->net_seq_index = ++relayd_net_seq_idx; |
575 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
576 | } |
577 | ||
2f77fc4b | 578 | /* Send relayd socket to consumer. */ |
6151a90f JD |
579 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
580 | relayd_uri->stype, session->id); | |
2f77fc4b | 581 | if (ret < 0) { |
f73fabfd | 582 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
583 | goto close_sock; |
584 | } | |
585 | ||
c890b720 DG |
586 | /* Flag that the corresponding socket was sent. */ |
587 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 588 | consumer_sock->control_sock_sent = 1; |
c890b720 | 589 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 590 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
591 | } |
592 | ||
f73fabfd | 593 | ret = LTTNG_OK; |
2f77fc4b DG |
594 | |
595 | /* | |
596 | * Close socket which was dup on the consumer side. The session daemon does | |
597 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
598 | */ | |
599 | ||
600 | close_sock: | |
6151a90f JD |
601 | (void) relayd_close(rsock); |
602 | free(rsock); | |
2f77fc4b | 603 | |
6151a90f | 604 | error: |
ffe60014 DG |
605 | if (ret != LTTNG_OK) { |
606 | /* | |
607 | * On error, nullify the consumer sequence index so streams are not | |
608 | * associated with it once sent to the consumer. | |
609 | */ | |
610 | uatomic_set(&consumer->net_seq_index, -1); | |
611 | } | |
2f77fc4b DG |
612 | return ret; |
613 | } | |
614 | ||
615 | /* | |
616 | * Send both relayd sockets to a specific consumer and domain. This is a | |
617 | * helper function to facilitate sending the information to the consumer for a | |
618 | * session. | |
619 | */ | |
620 | static int send_consumer_relayd_sockets(int domain, | |
f50f23d9 DG |
621 | struct ltt_session *session, struct consumer_output *consumer, |
622 | struct consumer_socket *sock) | |
2f77fc4b | 623 | { |
dda67f6c | 624 | int ret = LTTNG_OK; |
2f77fc4b DG |
625 | |
626 | assert(session); | |
627 | assert(consumer); | |
628 | ||
2f77fc4b | 629 | /* Sending control relayd socket. */ |
ffe60014 | 630 | if (!sock->control_sock_sent) { |
c890b720 | 631 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 632 | &consumer->dst.net.control, consumer, sock); |
c890b720 DG |
633 | if (ret != LTTNG_OK) { |
634 | goto error; | |
635 | } | |
2f77fc4b DG |
636 | } |
637 | ||
638 | /* Sending data relayd socket. */ | |
ffe60014 | 639 | if (!sock->data_sock_sent) { |
c890b720 | 640 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 641 | &consumer->dst.net.data, consumer, sock); |
c890b720 DG |
642 | if (ret != LTTNG_OK) { |
643 | goto error; | |
644 | } | |
2f77fc4b DG |
645 | } |
646 | ||
2f77fc4b DG |
647 | error: |
648 | return ret; | |
649 | } | |
650 | ||
651 | /* | |
652 | * Setup relayd connections for a tracing session. First creates the socket to | |
653 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
654 | * network. | |
655 | */ | |
ffe60014 | 656 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 657 | { |
f73fabfd | 658 | int ret = LTTNG_OK; |
2f77fc4b DG |
659 | struct ltt_ust_session *usess; |
660 | struct ltt_kernel_session *ksess; | |
661 | struct consumer_socket *socket; | |
662 | struct lttng_ht_iter iter; | |
663 | ||
664 | assert(session); | |
665 | ||
666 | usess = session->ust_session; | |
667 | ksess = session->kernel_session; | |
668 | ||
785d2d0d | 669 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 670 | |
e7fe706f DG |
671 | rcu_read_lock(); |
672 | ||
2f77fc4b DG |
673 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
674 | && usess->consumer->enabled) { | |
675 | /* For each consumer socket, send relayd sockets */ | |
676 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
677 | socket, node.node) { | |
678 | /* Code flow error */ | |
679 | assert(socket->fd >= 0); | |
680 | ||
681 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 682 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session, |
f50f23d9 | 683 | usess->consumer, socket); |
2f77fc4b | 684 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 685 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
686 | goto error; |
687 | } | |
688 | } | |
689 | } | |
690 | ||
691 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
692 | && ksess->consumer->enabled) { | |
693 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
694 | socket, node.node) { | |
695 | /* Code flow error */ | |
696 | assert(socket->fd >= 0); | |
697 | ||
698 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 699 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session, |
f50f23d9 | 700 | ksess->consumer, socket); |
2f77fc4b | 701 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 702 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
703 | goto error; |
704 | } | |
705 | } | |
706 | } | |
707 | ||
708 | error: | |
e7fe706f | 709 | rcu_read_unlock(); |
2f77fc4b DG |
710 | return ret; |
711 | } | |
712 | ||
9b6c7ec5 DG |
713 | /* |
714 | * Start a kernel session by opening all necessary streams. | |
715 | */ | |
716 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
717 | { | |
718 | int ret; | |
719 | struct ltt_kernel_channel *kchan; | |
720 | ||
721 | /* Open kernel metadata */ | |
722 | if (ksess->metadata == NULL) { | |
723 | ret = kernel_open_metadata(ksess); | |
724 | if (ret < 0) { | |
725 | ret = LTTNG_ERR_KERN_META_FAIL; | |
726 | goto error; | |
727 | } | |
728 | } | |
729 | ||
730 | /* Open kernel metadata stream */ | |
731 | if (ksess->metadata_stream_fd < 0) { | |
732 | ret = kernel_open_metadata_stream(ksess); | |
733 | if (ret < 0) { | |
734 | ERR("Kernel create metadata stream failed"); | |
735 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
736 | goto error; | |
737 | } | |
738 | } | |
739 | ||
740 | /* For each channel */ | |
741 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
742 | if (kchan->stream_count == 0) { | |
743 | ret = kernel_open_channel_stream(kchan); | |
744 | if (ret < 0) { | |
745 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
746 | goto error; | |
747 | } | |
748 | /* Update the stream global counter */ | |
749 | ksess->stream_count_global += ret; | |
750 | } | |
751 | } | |
752 | ||
753 | /* Setup kernel consumer socket and send fds to it */ | |
754 | ret = init_kernel_tracing(ksess); | |
755 | if (ret < 0) { | |
756 | ret = LTTNG_ERR_KERN_START_FAIL; | |
757 | goto error; | |
758 | } | |
759 | ||
760 | /* This start the kernel tracing */ | |
761 | ret = kernel_start_session(ksess); | |
762 | if (ret < 0) { | |
763 | ret = LTTNG_ERR_KERN_START_FAIL; | |
764 | goto error; | |
765 | } | |
766 | ||
767 | /* Quiescent wait after starting trace */ | |
784303b0 | 768 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
769 | |
770 | ksess->started = 1; | |
771 | ||
772 | ret = LTTNG_OK; | |
773 | ||
774 | error: | |
775 | return ret; | |
776 | } | |
777 | ||
2f77fc4b DG |
778 | /* |
779 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
780 | */ | |
781 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
782 | char *channel_name) | |
783 | { | |
784 | int ret; | |
785 | struct ltt_ust_session *usess; | |
786 | ||
787 | usess = session->ust_session; | |
788 | ||
2223c96f DG |
789 | rcu_read_lock(); |
790 | ||
2f77fc4b DG |
791 | switch (domain) { |
792 | case LTTNG_DOMAIN_KERNEL: | |
793 | { | |
794 | ret = channel_kernel_disable(session->kernel_session, | |
795 | channel_name); | |
f73fabfd | 796 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
797 | goto error; |
798 | } | |
799 | ||
800 | kernel_wait_quiescent(kernel_tracer_fd); | |
801 | break; | |
802 | } | |
803 | case LTTNG_DOMAIN_UST: | |
804 | { | |
805 | struct ltt_ust_channel *uchan; | |
806 | struct lttng_ht *chan_ht; | |
807 | ||
808 | chan_ht = usess->domain_global.channels; | |
809 | ||
810 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
811 | if (uchan == NULL) { | |
f73fabfd | 812 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
813 | goto error; |
814 | } | |
815 | ||
7972aab2 | 816 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 817 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
818 | goto error; |
819 | } | |
820 | break; | |
821 | } | |
822 | #if 0 | |
823 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
824 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
825 | case LTTNG_DOMAIN_UST_PID: | |
826 | #endif | |
827 | default: | |
f73fabfd | 828 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
829 | goto error; |
830 | } | |
831 | ||
f73fabfd | 832 | ret = LTTNG_OK; |
2f77fc4b DG |
833 | |
834 | error: | |
2223c96f | 835 | rcu_read_unlock(); |
2f77fc4b DG |
836 | return ret; |
837 | } | |
838 | ||
839 | /* | |
840 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
841 | * | |
842 | * The wpipe arguments is used as a notifier for the kernel thread. | |
843 | */ | |
844 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 845 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
846 | { |
847 | int ret; | |
848 | struct ltt_ust_session *usess = session->ust_session; | |
849 | struct lttng_ht *chan_ht; | |
850 | ||
851 | assert(session); | |
852 | assert(attr); | |
7972aab2 | 853 | assert(domain); |
2f77fc4b DG |
854 | |
855 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
856 | ||
2223c96f DG |
857 | rcu_read_lock(); |
858 | ||
7972aab2 | 859 | switch (domain->type) { |
2f77fc4b DG |
860 | case LTTNG_DOMAIN_KERNEL: |
861 | { | |
862 | struct ltt_kernel_channel *kchan; | |
863 | ||
2f77fc4b DG |
864 | kchan = trace_kernel_get_channel_by_name(attr->name, |
865 | session->kernel_session); | |
866 | if (kchan == NULL) { | |
867 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
868 | } else { | |
869 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
870 | } | |
871 | ||
f73fabfd | 872 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
873 | goto error; |
874 | } | |
875 | ||
784303b0 | 876 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
877 | |
878 | /* | |
879 | * If the session was previously started, start as well this newly | |
880 | * created kernel session so the events/channels enabled *after* the | |
881 | * start actually work. | |
882 | */ | |
883 | if (session->started && !session->kernel_session->started) { | |
884 | ret = start_kernel_session(session->kernel_session, wpipe); | |
885 | if (ret != LTTNG_OK) { | |
886 | goto error; | |
887 | } | |
888 | } | |
2f77fc4b DG |
889 | break; |
890 | } | |
891 | case LTTNG_DOMAIN_UST: | |
892 | { | |
893 | struct ltt_ust_channel *uchan; | |
894 | ||
895 | chan_ht = usess->domain_global.channels; | |
896 | ||
897 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
898 | if (uchan == NULL) { | |
7972aab2 | 899 | ret = channel_ust_create(usess, attr, domain->buf_type); |
2f77fc4b | 900 | } else { |
7972aab2 | 901 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b | 902 | } |
9b6c7ec5 DG |
903 | |
904 | /* Start the UST session if the session was already started. */ | |
905 | if (session->started && !usess->start_trace) { | |
906 | ret = ust_app_start_trace_all(usess); | |
907 | if (ret < 0) { | |
908 | ret = LTTNG_ERR_UST_START_FAIL; | |
909 | goto error; | |
910 | } | |
911 | ret = LTTNG_OK; | |
912 | usess->start_trace = 1; | |
913 | } | |
2f77fc4b DG |
914 | break; |
915 | } | |
2f77fc4b | 916 | default: |
f73fabfd | 917 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
918 | goto error; |
919 | } | |
920 | ||
921 | error: | |
2223c96f | 922 | rcu_read_unlock(); |
2f77fc4b DG |
923 | return ret; |
924 | } | |
925 | ||
926 | ||
927 | /* | |
928 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
929 | */ | |
930 | int cmd_disable_event(struct ltt_session *session, int domain, | |
931 | char *channel_name, char *event_name) | |
932 | { | |
933 | int ret; | |
934 | ||
2223c96f DG |
935 | rcu_read_lock(); |
936 | ||
2f77fc4b DG |
937 | switch (domain) { |
938 | case LTTNG_DOMAIN_KERNEL: | |
939 | { | |
940 | struct ltt_kernel_channel *kchan; | |
941 | struct ltt_kernel_session *ksess; | |
942 | ||
943 | ksess = session->kernel_session; | |
944 | ||
945 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
946 | if (kchan == NULL) { | |
f73fabfd | 947 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
948 | goto error; |
949 | } | |
950 | ||
d3a56674 | 951 | ret = event_kernel_disable_tracepoint(kchan, event_name); |
f73fabfd | 952 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
953 | goto error; |
954 | } | |
955 | ||
956 | kernel_wait_quiescent(kernel_tracer_fd); | |
957 | break; | |
958 | } | |
959 | case LTTNG_DOMAIN_UST: | |
960 | { | |
961 | struct ltt_ust_channel *uchan; | |
962 | struct ltt_ust_session *usess; | |
963 | ||
964 | usess = session->ust_session; | |
965 | ||
966 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
967 | channel_name); | |
968 | if (uchan == NULL) { | |
f73fabfd | 969 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
970 | goto error; |
971 | } | |
972 | ||
7972aab2 | 973 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
f73fabfd | 974 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
975 | goto error; |
976 | } | |
977 | ||
978 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
979 | channel_name); | |
980 | break; | |
981 | } | |
982 | #if 0 | |
983 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
984 | case LTTNG_DOMAIN_UST_PID: | |
985 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
986 | #endif | |
987 | default: | |
f73fabfd | 988 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
989 | goto error; |
990 | } | |
991 | ||
f73fabfd | 992 | ret = LTTNG_OK; |
2f77fc4b DG |
993 | |
994 | error: | |
2223c96f | 995 | rcu_read_unlock(); |
2f77fc4b DG |
996 | return ret; |
997 | } | |
998 | ||
999 | /* | |
1000 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
1001 | */ | |
1002 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
1003 | char *channel_name) | |
1004 | { | |
1005 | int ret; | |
1006 | ||
2223c96f DG |
1007 | rcu_read_lock(); |
1008 | ||
2f77fc4b DG |
1009 | switch (domain) { |
1010 | case LTTNG_DOMAIN_KERNEL: | |
1011 | { | |
1012 | struct ltt_kernel_session *ksess; | |
1013 | struct ltt_kernel_channel *kchan; | |
1014 | ||
1015 | ksess = session->kernel_session; | |
1016 | ||
1017 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
1018 | if (kchan == NULL) { | |
f73fabfd | 1019 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1020 | goto error; |
1021 | } | |
1022 | ||
d3a56674 | 1023 | ret = event_kernel_disable_all(kchan); |
f73fabfd | 1024 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1025 | goto error; |
1026 | } | |
1027 | ||
1028 | kernel_wait_quiescent(kernel_tracer_fd); | |
1029 | break; | |
1030 | } | |
1031 | case LTTNG_DOMAIN_UST: | |
1032 | { | |
1033 | struct ltt_ust_session *usess; | |
1034 | struct ltt_ust_channel *uchan; | |
1035 | ||
1036 | usess = session->ust_session; | |
1037 | ||
1038 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1039 | channel_name); | |
1040 | if (uchan == NULL) { | |
f73fabfd | 1041 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1042 | goto error; |
1043 | } | |
1044 | ||
7972aab2 | 1045 | ret = event_ust_disable_all_tracepoints(usess, uchan); |
2f77fc4b DG |
1046 | if (ret != 0) { |
1047 | goto error; | |
1048 | } | |
1049 | ||
1050 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1051 | ||
1052 | break; | |
1053 | } | |
1054 | #if 0 | |
1055 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1056 | case LTTNG_DOMAIN_UST_PID: | |
1057 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1058 | #endif | |
1059 | default: | |
f73fabfd | 1060 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1061 | goto error; |
1062 | } | |
1063 | ||
f73fabfd | 1064 | ret = LTTNG_OK; |
2f77fc4b DG |
1065 | |
1066 | error: | |
2223c96f | 1067 | rcu_read_unlock(); |
2f77fc4b DG |
1068 | return ret; |
1069 | } | |
1070 | ||
1071 | /* | |
1072 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1073 | */ | |
1074 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1075 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b DG |
1076 | { |
1077 | int ret; | |
1078 | ||
1079 | switch (domain) { | |
1080 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1081 | assert(session->kernel_session); |
1082 | ||
1083 | if (session->kernel_session->channel_count == 0) { | |
1084 | /* Create default channel */ | |
1085 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1086 | if (ret != LTTNG_OK) { | |
1087 | goto error; | |
1088 | } | |
1089 | } | |
1090 | ||
2f77fc4b | 1091 | /* Add kernel context to kernel tracer */ |
601d5acf | 1092 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1093 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1094 | goto error; |
1095 | } | |
1096 | break; | |
1097 | case LTTNG_DOMAIN_UST: | |
1098 | { | |
1099 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
1100 | assert(usess); |
1101 | ||
979e618e DG |
1102 | unsigned int chan_count = |
1103 | lttng_ht_get_count(usess->domain_global.channels); | |
1104 | if (chan_count == 0) { | |
1105 | struct lttng_channel *attr; | |
1106 | /* Create default channel */ | |
1107 | attr = channel_new_default_attr(domain); | |
1108 | if (attr == NULL) { | |
1109 | ret = LTTNG_ERR_FATAL; | |
1110 | goto error; | |
1111 | } | |
1112 | ||
7972aab2 | 1113 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1114 | if (ret != LTTNG_OK) { |
1115 | free(attr); | |
1116 | goto error; | |
1117 | } | |
1118 | free(attr); | |
1119 | } | |
1120 | ||
601d5acf | 1121 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1122 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1123 | goto error; |
1124 | } | |
1125 | break; | |
1126 | } | |
1127 | #if 0 | |
1128 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1129 | case LTTNG_DOMAIN_UST_PID: | |
1130 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1131 | #endif | |
1132 | default: | |
f73fabfd | 1133 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1134 | goto error; |
1135 | } | |
1136 | ||
f73fabfd | 1137 | ret = LTTNG_OK; |
2f77fc4b DG |
1138 | |
1139 | error: | |
1140 | return ret; | |
1141 | } | |
1142 | ||
2f77fc4b DG |
1143 | /* |
1144 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1145 | */ | |
7972aab2 | 1146 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 DG |
1147 | char *channel_name, struct lttng_event *event, |
1148 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b | 1149 | { |
e5f5db7f | 1150 | int ret, channel_created = 0; |
2f77fc4b DG |
1151 | struct lttng_channel *attr; |
1152 | ||
1153 | assert(session); | |
1154 | assert(event); | |
1155 | assert(channel_name); | |
1156 | ||
2223c96f DG |
1157 | rcu_read_lock(); |
1158 | ||
7972aab2 | 1159 | switch (domain->type) { |
2f77fc4b DG |
1160 | case LTTNG_DOMAIN_KERNEL: |
1161 | { | |
1162 | struct ltt_kernel_channel *kchan; | |
1163 | ||
1164 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1165 | session->kernel_session); | |
1166 | if (kchan == NULL) { | |
7972aab2 | 1167 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL); |
2f77fc4b | 1168 | if (attr == NULL) { |
f73fabfd | 1169 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1170 | goto error; |
1171 | } | |
1172 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1173 | ||
1174 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1175 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1176 | free(attr); |
1177 | goto error; | |
1178 | } | |
1179 | free(attr); | |
e5f5db7f DG |
1180 | |
1181 | channel_created = 1; | |
2f77fc4b DG |
1182 | } |
1183 | ||
1184 | /* Get the newly created kernel channel pointer */ | |
1185 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1186 | session->kernel_session); | |
1187 | if (kchan == NULL) { | |
1188 | /* This sould not happen... */ | |
f73fabfd | 1189 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1190 | goto error; |
1191 | } | |
1192 | ||
d3a56674 | 1193 | ret = event_kernel_enable_tracepoint(kchan, event); |
f73fabfd | 1194 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1195 | if (channel_created) { |
1196 | /* Let's not leak a useless channel. */ | |
1197 | kernel_destroy_channel(kchan); | |
1198 | } | |
2f77fc4b DG |
1199 | goto error; |
1200 | } | |
1201 | ||
1202 | kernel_wait_quiescent(kernel_tracer_fd); | |
1203 | break; | |
1204 | } | |
1205 | case LTTNG_DOMAIN_UST: | |
1206 | { | |
1207 | struct ltt_ust_channel *uchan; | |
1208 | struct ltt_ust_session *usess = session->ust_session; | |
1209 | ||
1210 | assert(usess); | |
1211 | ||
1212 | /* Get channel from global UST domain */ | |
1213 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1214 | channel_name); | |
1215 | if (uchan == NULL) { | |
1216 | /* Create default channel */ | |
7972aab2 | 1217 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST); |
2f77fc4b | 1218 | if (attr == NULL) { |
f73fabfd | 1219 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1220 | goto error; |
1221 | } | |
1222 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1223 | ||
1224 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1225 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1226 | free(attr); |
1227 | goto error; | |
1228 | } | |
1229 | free(attr); | |
1230 | ||
1231 | /* Get the newly created channel reference back */ | |
1232 | uchan = trace_ust_find_channel_by_name( | |
1233 | usess->domain_global.channels, channel_name); | |
1234 | assert(uchan); | |
1235 | } | |
1236 | ||
1237 | /* At this point, the session and channel exist on the tracer */ | |
7972aab2 | 1238 | ret = event_ust_enable_tracepoint(usess, uchan, event, filter); |
f73fabfd | 1239 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1240 | goto error; |
1241 | } | |
1242 | break; | |
1243 | } | |
1244 | #if 0 | |
1245 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1246 | case LTTNG_DOMAIN_UST_PID: | |
1247 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1248 | #endif | |
1249 | default: | |
f73fabfd | 1250 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1251 | goto error; |
1252 | } | |
1253 | ||
f73fabfd | 1254 | ret = LTTNG_OK; |
2f77fc4b DG |
1255 | |
1256 | error: | |
2223c96f | 1257 | rcu_read_unlock(); |
2f77fc4b DG |
1258 | return ret; |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1263 | */ | |
7972aab2 DG |
1264 | int cmd_enable_event_all(struct ltt_session *session, |
1265 | struct lttng_domain *domain, char *channel_name, int event_type, | |
025faf73 | 1266 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1267 | { |
1268 | int ret; | |
1269 | struct lttng_channel *attr; | |
1270 | ||
1271 | assert(session); | |
1272 | assert(channel_name); | |
1273 | ||
2223c96f DG |
1274 | rcu_read_lock(); |
1275 | ||
7972aab2 | 1276 | switch (domain->type) { |
2f77fc4b DG |
1277 | case LTTNG_DOMAIN_KERNEL: |
1278 | { | |
1279 | struct ltt_kernel_channel *kchan; | |
1280 | ||
1281 | assert(session->kernel_session); | |
1282 | ||
1283 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1284 | session->kernel_session); | |
1285 | if (kchan == NULL) { | |
1286 | /* Create default channel */ | |
7972aab2 | 1287 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL); |
2f77fc4b | 1288 | if (attr == NULL) { |
f73fabfd | 1289 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1290 | goto error; |
1291 | } | |
1292 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1293 | ||
1294 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1295 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1296 | free(attr); |
1297 | goto error; | |
1298 | } | |
1299 | free(attr); | |
1300 | ||
1301 | /* Get the newly created kernel channel pointer */ | |
1302 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1303 | session->kernel_session); | |
1304 | assert(kchan); | |
1305 | } | |
1306 | ||
1307 | switch (event_type) { | |
1308 | case LTTNG_EVENT_SYSCALL: | |
d3a56674 | 1309 | ret = event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1310 | break; |
1311 | case LTTNG_EVENT_TRACEPOINT: | |
1312 | /* | |
1313 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1314 | * events already registered to the channel. | |
1315 | */ | |
d3a56674 | 1316 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1317 | break; |
1318 | case LTTNG_EVENT_ALL: | |
1319 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1320 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1321 | break; |
1322 | default: | |
f73fabfd | 1323 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1324 | goto error; |
1325 | } | |
1326 | ||
1327 | /* Manage return value */ | |
f73fabfd | 1328 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1329 | /* |
1330 | * On error, cmd_enable_channel call will take care of destroying | |
1331 | * the created channel if it was needed. | |
1332 | */ | |
2f77fc4b DG |
1333 | goto error; |
1334 | } | |
1335 | ||
1336 | kernel_wait_quiescent(kernel_tracer_fd); | |
1337 | break; | |
1338 | } | |
1339 | case LTTNG_DOMAIN_UST: | |
1340 | { | |
1341 | struct ltt_ust_channel *uchan; | |
1342 | struct ltt_ust_session *usess = session->ust_session; | |
1343 | ||
1344 | assert(usess); | |
1345 | ||
1346 | /* Get channel from global UST domain */ | |
1347 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1348 | channel_name); | |
1349 | if (uchan == NULL) { | |
1350 | /* Create default channel */ | |
7972aab2 | 1351 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST); |
2f77fc4b | 1352 | if (attr == NULL) { |
f73fabfd | 1353 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1354 | goto error; |
1355 | } | |
1356 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1357 | ||
1358 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1359 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1360 | free(attr); |
1361 | goto error; | |
1362 | } | |
1363 | free(attr); | |
1364 | ||
1365 | /* Get the newly created channel reference back */ | |
1366 | uchan = trace_ust_find_channel_by_name( | |
1367 | usess->domain_global.channels, channel_name); | |
1368 | assert(uchan); | |
1369 | } | |
1370 | ||
1371 | /* At this point, the session and channel exist on the tracer */ | |
1372 | ||
1373 | switch (event_type) { | |
1374 | case LTTNG_EVENT_ALL: | |
1375 | case LTTNG_EVENT_TRACEPOINT: | |
7972aab2 | 1376 | ret = event_ust_enable_all_tracepoints(usess, uchan, filter); |
f73fabfd | 1377 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1378 | goto error; |
1379 | } | |
1380 | break; | |
1381 | default: | |
f73fabfd | 1382 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1383 | goto error; |
1384 | } | |
1385 | ||
1386 | /* Manage return value */ | |
f73fabfd | 1387 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1388 | goto error; |
1389 | } | |
1390 | ||
1391 | break; | |
1392 | } | |
1393 | #if 0 | |
1394 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1395 | case LTTNG_DOMAIN_UST_PID: | |
1396 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1397 | #endif | |
1398 | default: | |
f73fabfd | 1399 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1400 | goto error; |
1401 | } | |
1402 | ||
f73fabfd | 1403 | ret = LTTNG_OK; |
2f77fc4b DG |
1404 | |
1405 | error: | |
2223c96f | 1406 | rcu_read_unlock(); |
2f77fc4b DG |
1407 | return ret; |
1408 | } | |
1409 | ||
1410 | ||
1411 | /* | |
1412 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1413 | */ | |
1414 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1415 | { | |
1416 | int ret; | |
1417 | ssize_t nb_events = 0; | |
1418 | ||
1419 | switch (domain) { | |
1420 | case LTTNG_DOMAIN_KERNEL: | |
1421 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1422 | if (nb_events < 0) { | |
f73fabfd | 1423 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1424 | goto error; |
1425 | } | |
1426 | break; | |
1427 | case LTTNG_DOMAIN_UST: | |
1428 | nb_events = ust_app_list_events(events); | |
1429 | if (nb_events < 0) { | |
f73fabfd | 1430 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1431 | goto error; |
1432 | } | |
1433 | break; | |
1434 | default: | |
f73fabfd | 1435 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1436 | goto error; |
1437 | } | |
1438 | ||
1439 | return nb_events; | |
1440 | ||
1441 | error: | |
1442 | /* Return negative value to differentiate return code */ | |
1443 | return -ret; | |
1444 | } | |
1445 | ||
1446 | /* | |
1447 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1448 | */ | |
1449 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1450 | struct lttng_event_field **fields) | |
1451 | { | |
1452 | int ret; | |
1453 | ssize_t nb_fields = 0; | |
1454 | ||
1455 | switch (domain) { | |
1456 | case LTTNG_DOMAIN_UST: | |
1457 | nb_fields = ust_app_list_event_fields(fields); | |
1458 | if (nb_fields < 0) { | |
f73fabfd | 1459 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1460 | goto error; |
1461 | } | |
1462 | break; | |
1463 | case LTTNG_DOMAIN_KERNEL: | |
1464 | default: /* fall-through */ | |
f73fabfd | 1465 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1466 | goto error; |
1467 | } | |
1468 | ||
1469 | return nb_fields; | |
1470 | ||
1471 | error: | |
1472 | /* Return negative value to differentiate return code */ | |
1473 | return -ret; | |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * Command LTTNG_START_TRACE processed by the client thread. | |
1478 | */ | |
1479 | int cmd_start_trace(struct ltt_session *session) | |
1480 | { | |
1481 | int ret; | |
1482 | struct ltt_kernel_session *ksession; | |
1483 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1484 | |
1485 | assert(session); | |
1486 | ||
1487 | /* Ease our life a bit ;) */ | |
1488 | ksession = session->kernel_session; | |
1489 | usess = session->ust_session; | |
1490 | ||
1491 | if (session->enabled) { | |
1492 | /* Already started. */ | |
f73fabfd | 1493 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1494 | goto error; |
1495 | } | |
1496 | ||
1497 | session->enabled = 1; | |
1498 | ||
2f77fc4b DG |
1499 | /* Kernel tracing */ |
1500 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1501 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1502 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1503 | goto error; |
1504 | } | |
2f77fc4b DG |
1505 | } |
1506 | ||
1507 | /* Flag session that trace should start automatically */ | |
1508 | if (usess) { | |
1509 | usess->start_trace = 1; | |
1510 | ||
1511 | ret = ust_app_start_trace_all(usess); | |
1512 | if (ret < 0) { | |
f73fabfd | 1513 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1514 | goto error; |
1515 | } | |
1516 | } | |
1517 | ||
9b6c7ec5 DG |
1518 | session->started = 1; |
1519 | ||
f73fabfd | 1520 | ret = LTTNG_OK; |
2f77fc4b DG |
1521 | |
1522 | error: | |
1523 | return ret; | |
1524 | } | |
1525 | ||
1526 | /* | |
1527 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1528 | */ | |
1529 | int cmd_stop_trace(struct ltt_session *session) | |
1530 | { | |
1531 | int ret; | |
1532 | struct ltt_kernel_channel *kchan; | |
1533 | struct ltt_kernel_session *ksession; | |
1534 | struct ltt_ust_session *usess; | |
1535 | ||
1536 | assert(session); | |
1537 | ||
1538 | /* Short cut */ | |
1539 | ksession = session->kernel_session; | |
1540 | usess = session->ust_session; | |
1541 | ||
1542 | if (!session->enabled) { | |
f73fabfd | 1543 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1544 | goto error; |
1545 | } | |
1546 | ||
1547 | session->enabled = 0; | |
1548 | ||
1549 | /* Kernel tracer */ | |
1550 | if (ksession) { | |
1551 | DBG("Stop kernel tracing"); | |
1552 | ||
1553 | /* Flush metadata if exist */ | |
1554 | if (ksession->metadata_stream_fd >= 0) { | |
1555 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1556 | if (ret < 0) { | |
1557 | ERR("Kernel metadata flush failed"); | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | /* Flush all buffers before stopping */ | |
1562 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1563 | ret = kernel_flush_buffer(kchan); | |
1564 | if (ret < 0) { | |
1565 | ERR("Kernel flush buffer error"); | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | ret = kernel_stop_session(ksession); | |
1570 | if (ret < 0) { | |
f73fabfd | 1571 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1572 | goto error; |
1573 | } | |
1574 | ||
1575 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 DG |
1576 | |
1577 | ksession->started = 0; | |
2f77fc4b DG |
1578 | } |
1579 | ||
1580 | if (usess) { | |
1581 | usess->start_trace = 0; | |
1582 | ||
1583 | ret = ust_app_stop_trace_all(usess); | |
1584 | if (ret < 0) { | |
f73fabfd | 1585 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1586 | goto error; |
1587 | } | |
1588 | } | |
1589 | ||
9b6c7ec5 DG |
1590 | session->started = 0; |
1591 | ||
f73fabfd | 1592 | ret = LTTNG_OK; |
2f77fc4b DG |
1593 | |
1594 | error: | |
1595 | return ret; | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1600 | */ | |
1601 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1602 | size_t nb_uri, struct lttng_uri *uris) | |
1603 | { | |
1604 | int ret, i; | |
1605 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1606 | struct ltt_ust_session *usess = session->ust_session; | |
1607 | struct consumer_output *consumer = NULL; | |
1608 | ||
1609 | assert(session); | |
1610 | assert(uris); | |
1611 | assert(nb_uri > 0); | |
1612 | ||
1613 | /* Can't enable consumer after session started. */ | |
1614 | if (session->enabled) { | |
f73fabfd | 1615 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1616 | goto error; |
1617 | } | |
1618 | ||
2f77fc4b DG |
1619 | /* |
1620 | * This case switch makes sure the domain session has a temporary consumer | |
1621 | * so the URL can be set. | |
1622 | */ | |
1623 | switch (domain) { | |
1624 | case 0: | |
1625 | /* Code flow error. A session MUST always have a consumer object */ | |
1626 | assert(session->consumer); | |
1627 | /* | |
1628 | * The URL will be added to the tracing session consumer instead of a | |
1629 | * specific domain consumer. | |
1630 | */ | |
1631 | consumer = session->consumer; | |
1632 | break; | |
1633 | case LTTNG_DOMAIN_KERNEL: | |
1634 | /* Code flow error if we don't have a kernel session here. */ | |
1635 | assert(ksess); | |
785d2d0d DG |
1636 | assert(ksess->consumer); |
1637 | consumer = ksess->consumer; | |
2f77fc4b DG |
1638 | break; |
1639 | case LTTNG_DOMAIN_UST: | |
1640 | /* Code flow error if we don't have a kernel session here. */ | |
1641 | assert(usess); | |
785d2d0d DG |
1642 | assert(usess->consumer); |
1643 | consumer = usess->consumer; | |
2f77fc4b DG |
1644 | break; |
1645 | } | |
1646 | ||
1647 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b DG |
1648 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
1649 | if (ret < 0) { | |
1650 | goto error; | |
1651 | } | |
2f77fc4b DG |
1652 | } |
1653 | ||
1654 | /* All good! */ | |
f73fabfd | 1655 | ret = LTTNG_OK; |
2f77fc4b DG |
1656 | |
1657 | error: | |
1658 | return ret; | |
1659 | } | |
1660 | ||
1661 | /* | |
1662 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1663 | */ | |
1664 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
1665 | size_t nb_uri, lttng_sock_cred *creds) | |
1666 | { | |
1667 | int ret; | |
1668 | char *path = NULL; | |
1669 | struct ltt_session *session; | |
1670 | ||
1671 | assert(name); | |
1672 | ||
785d2d0d DG |
1673 | /* No URIs is not possible. */ |
1674 | if (uris == NULL) { | |
1675 | ret = LTTNG_ERR_SESSION_FAIL; | |
1676 | goto session_error; | |
1677 | } | |
1678 | ||
2f77fc4b DG |
1679 | /* |
1680 | * Verify if the session already exist | |
1681 | * | |
1682 | * XXX: There is no need for the session lock list here since the caller | |
1683 | * (process_client_msg) is holding it. We might want to change that so a | |
1684 | * single command does not lock the entire session list. | |
1685 | */ | |
1686 | session = session_find_by_name(name); | |
1687 | if (session != NULL) { | |
f73fabfd | 1688 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1689 | goto find_error; |
1690 | } | |
1691 | ||
1692 | /* Create tracing session in the registry */ | |
1693 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), | |
1694 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
f73fabfd | 1695 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1696 | goto session_error; |
1697 | } | |
1698 | ||
1699 | /* | |
1700 | * Get the newly created session pointer back | |
1701 | * | |
1702 | * XXX: There is no need for the session lock list here since the caller | |
1703 | * (process_client_msg) is holding it. We might want to change that so a | |
1704 | * single command does not lock the entire session list. | |
1705 | */ | |
1706 | session = session_find_by_name(name); | |
1707 | assert(session); | |
1708 | ||
1709 | /* Create default consumer output for the session not yet created. */ | |
1710 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1711 | if (session->consumer == NULL) { | |
f73fabfd | 1712 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1713 | goto consumer_error; |
1714 | } | |
1715 | ||
2f77fc4b | 1716 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); |
f73fabfd | 1717 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1718 | goto consumer_error; |
1719 | } | |
1720 | ||
1721 | session->consumer->enabled = 1; | |
1722 | ||
f73fabfd | 1723 | return LTTNG_OK; |
2f77fc4b DG |
1724 | |
1725 | consumer_error: | |
1726 | session_destroy(session); | |
1727 | session_error: | |
1728 | find_error: | |
1729 | return ret; | |
1730 | } | |
1731 | ||
1732 | /* | |
1733 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1734 | */ | |
1735 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1736 | { | |
1737 | int ret; | |
1738 | struct ltt_ust_session *usess; | |
1739 | struct ltt_kernel_session *ksess; | |
1740 | ||
1741 | /* Safety net */ | |
1742 | assert(session); | |
1743 | ||
1744 | usess = session->ust_session; | |
1745 | ksess = session->kernel_session; | |
1746 | ||
1747 | /* Clean kernel session teardown */ | |
1748 | kernel_destroy_session(ksess); | |
1749 | ||
1750 | /* UST session teardown */ | |
1751 | if (usess) { | |
1752 | /* Close any relayd session */ | |
1753 | consumer_output_send_destroy_relayd(usess->consumer); | |
1754 | ||
1755 | /* Destroy every UST application related to this session. */ | |
1756 | ret = ust_app_destroy_trace_all(usess); | |
1757 | if (ret) { | |
1758 | ERR("Error in ust_app_destroy_trace_all"); | |
1759 | } | |
1760 | ||
1761 | /* Clean up the rest. */ | |
1762 | trace_ust_destroy_session(usess); | |
1763 | } | |
1764 | ||
1765 | /* | |
1766 | * Must notify the kernel thread here to update it's poll set in order to | |
1767 | * remove the channel(s)' fd just destroyed. | |
1768 | */ | |
1769 | ret = notify_thread_pipe(wpipe); | |
1770 | if (ret < 0) { | |
1771 | PERROR("write kernel poll pipe"); | |
1772 | } | |
1773 | ||
1774 | ret = session_destroy(session); | |
1775 | ||
1776 | return ret; | |
1777 | } | |
1778 | ||
1779 | /* | |
1780 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1781 | */ | |
1782 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1783 | { | |
1784 | int ret; | |
1785 | ||
1786 | switch (domain) { | |
1787 | case LTTNG_DOMAIN_KERNEL: | |
1788 | { | |
1789 | struct lttng_kernel_calibrate kcalibrate; | |
1790 | ||
1791 | kcalibrate.type = calibrate->type; | |
1792 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1793 | if (ret < 0) { | |
f73fabfd | 1794 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1795 | goto error; |
1796 | } | |
1797 | break; | |
1798 | } | |
1799 | case LTTNG_DOMAIN_UST: | |
1800 | { | |
1801 | struct lttng_ust_calibrate ucalibrate; | |
1802 | ||
1803 | ucalibrate.type = calibrate->type; | |
1804 | ret = ust_app_calibrate_glb(&ucalibrate); | |
1805 | if (ret < 0) { | |
f73fabfd | 1806 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
1807 | goto error; |
1808 | } | |
1809 | break; | |
1810 | } | |
1811 | default: | |
f73fabfd | 1812 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1813 | goto error; |
1814 | } | |
1815 | ||
f73fabfd | 1816 | ret = LTTNG_OK; |
2f77fc4b DG |
1817 | |
1818 | error: | |
1819 | return ret; | |
1820 | } | |
1821 | ||
1822 | /* | |
1823 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
1824 | */ | |
1825 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
1826 | const char *sock_path, struct consumer_data *cdata) | |
1827 | { | |
1828 | int ret, sock; | |
1829 | struct consumer_socket *socket; | |
1830 | ||
1831 | assert(session); | |
1832 | assert(cdata); | |
1833 | assert(sock_path); | |
1834 | ||
1835 | switch (domain) { | |
1836 | case LTTNG_DOMAIN_KERNEL: | |
1837 | { | |
1838 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1839 | ||
1840 | assert(ksess); | |
1841 | ||
1842 | /* Can't register a consumer if there is already one */ | |
1843 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 1844 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
1845 | goto error; |
1846 | } | |
1847 | ||
1848 | sock = lttcomm_connect_unix_sock(sock_path); | |
1849 | if (sock < 0) { | |
f73fabfd | 1850 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
1851 | goto error; |
1852 | } | |
1853 | ||
1854 | socket = consumer_allocate_socket(sock); | |
1855 | if (socket == NULL) { | |
f66c074c DG |
1856 | ret = close(sock); |
1857 | if (ret < 0) { | |
1858 | PERROR("close register consumer"); | |
1859 | } | |
f73fabfd | 1860 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1861 | goto error; |
1862 | } | |
1863 | ||
1864 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
1865 | if (socket->lock == NULL) { | |
1866 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 1867 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1868 | goto error; |
1869 | } | |
1870 | pthread_mutex_init(socket->lock, NULL); | |
1871 | socket->registered = 1; | |
1872 | ||
1873 | rcu_read_lock(); | |
1874 | consumer_add_socket(socket, ksess->consumer); | |
1875 | rcu_read_unlock(); | |
1876 | ||
1877 | pthread_mutex_lock(&cdata->pid_mutex); | |
1878 | cdata->pid = -1; | |
1879 | pthread_mutex_unlock(&cdata->pid_mutex); | |
1880 | ||
1881 | break; | |
1882 | } | |
1883 | default: | |
1884 | /* TODO: Userspace tracing */ | |
f73fabfd | 1885 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1886 | goto error; |
1887 | } | |
1888 | ||
f73fabfd | 1889 | ret = LTTNG_OK; |
2f77fc4b DG |
1890 | |
1891 | error: | |
1892 | return ret; | |
1893 | } | |
1894 | ||
1895 | /* | |
1896 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
1897 | */ | |
1898 | ssize_t cmd_list_domains(struct ltt_session *session, | |
1899 | struct lttng_domain **domains) | |
1900 | { | |
1901 | int ret, index = 0; | |
1902 | ssize_t nb_dom = 0; | |
1903 | ||
1904 | if (session->kernel_session != NULL) { | |
1905 | DBG3("Listing domains found kernel domain"); | |
1906 | nb_dom++; | |
1907 | } | |
1908 | ||
1909 | if (session->ust_session != NULL) { | |
1910 | DBG3("Listing domains found UST global domain"); | |
1911 | nb_dom++; | |
1912 | } | |
1913 | ||
1914 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
1915 | if (*domains == NULL) { | |
f73fabfd | 1916 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1917 | goto error; |
1918 | } | |
1919 | ||
1920 | if (session->kernel_session != NULL) { | |
1921 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
1922 | index++; | |
1923 | } | |
1924 | ||
1925 | if (session->ust_session != NULL) { | |
1926 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 1927 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b DG |
1928 | index++; |
1929 | } | |
1930 | ||
1931 | return nb_dom; | |
1932 | ||
1933 | error: | |
f73fabfd DG |
1934 | /* Return negative value to differentiate return code */ |
1935 | return -ret; | |
2f77fc4b DG |
1936 | } |
1937 | ||
1938 | ||
1939 | /* | |
1940 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
1941 | */ | |
1942 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
1943 | struct lttng_channel **channels) | |
1944 | { | |
1945 | int ret; | |
1946 | ssize_t nb_chan = 0; | |
1947 | ||
1948 | switch (domain) { | |
1949 | case LTTNG_DOMAIN_KERNEL: | |
1950 | if (session->kernel_session != NULL) { | |
1951 | nb_chan = session->kernel_session->channel_count; | |
1952 | } | |
1953 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
1954 | if (nb_chan <= 0) { |
1955 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
1956 | } | |
2f77fc4b DG |
1957 | break; |
1958 | case LTTNG_DOMAIN_UST: | |
1959 | if (session->ust_session != NULL) { | |
1960 | nb_chan = lttng_ht_get_count( | |
1961 | session->ust_session->domain_global.channels); | |
1962 | } | |
1963 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
1964 | if (nb_chan <= 0) { |
1965 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1966 | } | |
2f77fc4b DG |
1967 | break; |
1968 | default: | |
1969 | *channels = NULL; | |
f73fabfd | 1970 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1971 | goto error; |
1972 | } | |
1973 | ||
1974 | if (nb_chan > 0) { | |
1975 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
1976 | if (*channels == NULL) { | |
f73fabfd | 1977 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1978 | goto error; |
1979 | } | |
1980 | ||
1981 | list_lttng_channels(domain, session, *channels); | |
1982 | } else { | |
1983 | *channels = NULL; | |
c7d620a2 DG |
1984 | /* Ret value was set in the domain switch case */ |
1985 | goto error; | |
2f77fc4b DG |
1986 | } |
1987 | ||
1988 | return nb_chan; | |
1989 | ||
1990 | error: | |
f73fabfd DG |
1991 | /* Return negative value to differentiate return code */ |
1992 | return -ret; | |
2f77fc4b DG |
1993 | } |
1994 | ||
1995 | /* | |
1996 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
1997 | */ | |
1998 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
1999 | char *channel_name, struct lttng_event **events) | |
2000 | { | |
2001 | int ret = 0; | |
2002 | ssize_t nb_event = 0; | |
2003 | ||
2004 | switch (domain) { | |
2005 | case LTTNG_DOMAIN_KERNEL: | |
2006 | if (session->kernel_session != NULL) { | |
2007 | nb_event = list_lttng_kernel_events(channel_name, | |
2008 | session->kernel_session, events); | |
2009 | } | |
2010 | break; | |
2011 | case LTTNG_DOMAIN_UST: | |
2012 | { | |
2013 | if (session->ust_session != NULL) { | |
2014 | nb_event = list_lttng_ust_global_events(channel_name, | |
2015 | &session->ust_session->domain_global, events); | |
2016 | } | |
2017 | break; | |
2018 | } | |
2019 | default: | |
f73fabfd | 2020 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2021 | goto error; |
2022 | } | |
2023 | ||
f73fabfd | 2024 | return nb_event; |
2f77fc4b DG |
2025 | |
2026 | error: | |
f73fabfd DG |
2027 | /* Return negative value to differentiate return code */ |
2028 | return -ret; | |
2f77fc4b DG |
2029 | } |
2030 | ||
2031 | /* | |
2032 | * Using the session list, filled a lttng_session array to send back to the | |
2033 | * client for session listing. | |
2034 | * | |
2035 | * The session list lock MUST be acquired before calling this function. Use | |
2036 | * session_lock_list() and session_unlock_list(). | |
2037 | */ | |
2038 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2039 | gid_t gid) | |
2040 | { | |
2041 | int ret; | |
2042 | unsigned int i = 0; | |
2043 | struct ltt_session *session; | |
2044 | struct ltt_session_list *list = session_get_list(); | |
2045 | ||
2046 | DBG("Getting all available session for UID %d GID %d", | |
2047 | uid, gid); | |
2048 | /* | |
2049 | * Iterate over session list and append data after the control struct in | |
2050 | * the buffer. | |
2051 | */ | |
2052 | cds_list_for_each_entry(session, &list->head, list) { | |
2053 | /* | |
2054 | * Only list the sessions the user can control. | |
2055 | */ | |
2056 | if (!session_access_ok(session, uid, gid)) { | |
2057 | continue; | |
2058 | } | |
2059 | ||
2060 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2061 | struct ltt_ust_session *usess = session->ust_session; | |
2062 | ||
2063 | if (session->consumer->type == CONSUMER_DST_NET || | |
2064 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2065 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2066 | ret = build_network_session_path(sessions[i].path, | |
2067 | sizeof(session[i].path), session); | |
2068 | } else { | |
2069 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2070 | session->consumer->dst.trace_path); | |
2071 | } | |
2072 | if (ret < 0) { | |
2073 | PERROR("snprintf session path"); | |
2074 | continue; | |
2075 | } | |
2076 | ||
2077 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2078 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2079 | sessions[i].enabled = session->enabled; | |
2080 | i++; | |
2081 | } | |
2082 | } | |
2083 | ||
806e2684 | 2084 | /* |
6d805429 DG |
2085 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
2086 | * ready for trace analysis (or anykind of reader) or else 1 for pending data. | |
806e2684 | 2087 | */ |
6d805429 | 2088 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2089 | { |
2090 | int ret; | |
2091 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2092 | struct ltt_ust_session *usess = session->ust_session; | |
2093 | ||
2094 | assert(session); | |
2095 | ||
2096 | /* Session MUST be stopped to ask for data availability. */ | |
2097 | if (session->enabled) { | |
2098 | ret = LTTNG_ERR_SESSION_STARTED; | |
2099 | goto error; | |
2100 | } | |
2101 | ||
2102 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2103 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2104 | if (ret == 1) { | |
806e2684 DG |
2105 | /* Data is still being extracted for the kernel. */ |
2106 | goto error; | |
2107 | } | |
2108 | } | |
2109 | ||
2110 | if (usess && usess->consumer) { | |
6d805429 DG |
2111 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2112 | if (ret == 1) { | |
806e2684 DG |
2113 | /* Data is still being extracted for the kernel. */ |
2114 | goto error; | |
2115 | } | |
2116 | } | |
2117 | ||
2118 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2119 | ret = 0; |
806e2684 DG |
2120 | |
2121 | error: | |
2122 | return ret; | |
2123 | } | |
2124 | ||
2f77fc4b DG |
2125 | /* |
2126 | * Init command subsystem. | |
2127 | */ | |
2128 | void cmd_init(void) | |
2129 | { | |
2130 | /* | |
d88aee68 DG |
2131 | * Set network sequence index to 1 for streams to match a relayd |
2132 | * socket on the consumer side. | |
2f77fc4b | 2133 | */ |
d88aee68 DG |
2134 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
2135 | relayd_net_seq_idx = 1; | |
2136 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
2137 | |
2138 | DBG("Command subsystem initialized"); | |
2139 | } |