Commit | Line | Data |
---|---|---|
2f77fc4b DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
20 | #include <urcu/list.h> | |
21 | #include <urcu/uatomic.h> | |
22 | ||
23 | #include <common/defaults.h> | |
24 | #include <common/common.h> | |
25 | #include <common/sessiond-comm/sessiond-comm.h> | |
26 | #include <common/relayd/relayd.h> | |
27 | ||
28 | #include "channel.h" | |
29 | #include "consumer.h" | |
30 | #include "event.h" | |
31 | #include "kernel.h" | |
32 | #include "kernel-consumer.h" | |
33 | #include "lttng-sessiond.h" | |
34 | #include "utils.h" | |
35 | ||
36 | #include "cmd.h" | |
37 | ||
38 | /* | |
39 | * Used to keep a unique index for each relayd socket created where this value | |
40 | * is associated with streams on the consumer so it can match the right relayd | |
41 | * to send to. | |
42 | * | |
43 | * This value should be incremented atomically for safety purposes and future | |
44 | * possible concurrent access. | |
45 | */ | |
46 | static unsigned int relayd_net_seq_idx; | |
47 | ||
48 | /* | |
49 | * Create a session path used by list_lttng_sessions for the case that the | |
50 | * session consumer is on the network. | |
51 | */ | |
52 | static int build_network_session_path(char *dst, size_t size, | |
53 | struct ltt_session *session) | |
54 | { | |
55 | int ret, kdata_port, udata_port; | |
56 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
57 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
58 | ||
59 | assert(session); | |
60 | assert(dst); | |
61 | ||
62 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
63 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
64 | ||
65 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
66 | ||
67 | if (session->kernel_session && session->kernel_session->consumer) { | |
68 | kuri = &session->kernel_session->consumer->dst.net.control; | |
69 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
70 | } | |
71 | ||
72 | if (session->ust_session && session->ust_session->consumer) { | |
73 | uuri = &session->ust_session->consumer->dst.net.control; | |
74 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
75 | } | |
76 | ||
77 | if (uuri == NULL && kuri == NULL) { | |
78 | uri = &session->consumer->dst.net.control; | |
79 | kdata_port = session->consumer->dst.net.data.port; | |
80 | } else if (kuri && uuri) { | |
81 | ret = uri_compare(kuri, uuri); | |
82 | if (ret) { | |
83 | /* Not Equal */ | |
84 | uri = kuri; | |
85 | /* Build uuri URL string */ | |
86 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
87 | if (ret < 0) { | |
88 | goto error; | |
89 | } | |
90 | } else { | |
91 | uri = kuri; | |
92 | } | |
93 | } else if (kuri && uuri == NULL) { | |
94 | uri = kuri; | |
95 | } else if (uuri && kuri == NULL) { | |
96 | uri = uuri; | |
97 | } | |
98 | ||
99 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
100 | if (ret < 0) { | |
101 | goto error; | |
102 | } | |
103 | ||
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 | */ | |
2f77fc4b DG |
108 | if (strlen(tmp_uurl) > 0) { |
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 | ||
2219ef35 | 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 | } | |
2219ef35 | 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; | |
309 | case LTTNG_KERNEL_KPROBE: | |
310 | case LTTNG_KERNEL_KRETPROBE: | |
311 | (*events)[i].type = LTTNG_EVENT_PROBE; | |
312 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
313 | sizeof(struct lttng_kernel_kprobe)); | |
314 | break; | |
315 | case LTTNG_KERNEL_FUNCTION: | |
316 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
317 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
318 | sizeof(struct lttng_kernel_function)); | |
319 | break; | |
320 | case LTTNG_KERNEL_NOOP: | |
321 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
322 | break; | |
323 | case LTTNG_KERNEL_SYSCALL: | |
324 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
325 | break; | |
326 | case LTTNG_KERNEL_ALL: | |
327 | assert(0); | |
328 | break; | |
329 | } | |
330 | i++; | |
331 | } | |
332 | ||
f73fabfd | 333 | end: |
2f77fc4b DG |
334 | return nb_event; |
335 | ||
336 | error: | |
f73fabfd DG |
337 | /* Negate the error code to differentiate the size from an error */ |
338 | return -ret; | |
2f77fc4b DG |
339 | } |
340 | ||
341 | /* | |
342 | * Add URI so the consumer output object. Set the correct path depending on the | |
343 | * domain adding the default trace directory. | |
344 | */ | |
345 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
346 | struct lttng_uri *uri, int domain, const char *session_name) | |
347 | { | |
f73fabfd | 348 | int ret = LTTNG_OK; |
2f77fc4b DG |
349 | const char *default_trace_dir; |
350 | ||
351 | assert(uri); | |
352 | ||
353 | if (consumer == NULL) { | |
354 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 355 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
356 | goto error; |
357 | } | |
358 | ||
359 | switch (domain) { | |
360 | case LTTNG_DOMAIN_KERNEL: | |
361 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
362 | break; | |
363 | case LTTNG_DOMAIN_UST: | |
364 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
365 | break; | |
366 | default: | |
367 | /* | |
368 | * This case is possible is we try to add the URI to the global tracing | |
369 | * session consumer object which in this case there is no subdir. | |
370 | */ | |
371 | default_trace_dir = ""; | |
372 | } | |
373 | ||
374 | switch (uri->dtype) { | |
375 | case LTTNG_DST_IPV4: | |
376 | case LTTNG_DST_IPV6: | |
377 | DBG2("Setting network URI to consumer"); | |
378 | ||
379 | /* Set URI into consumer output object */ | |
380 | ret = consumer_set_network_uri(consumer, uri); | |
381 | if (ret < 0) { | |
f73fabfd | 382 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
383 | goto error; |
384 | } else if (ret == 1) { | |
385 | /* | |
386 | * URI was the same in the consumer so we do not append the subdir | |
387 | * again so to not duplicate output dir. | |
388 | */ | |
389 | goto error; | |
390 | } | |
391 | ||
392 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
393 | ret = consumer_set_subdir(consumer, session_name); | |
394 | if (ret < 0) { | |
f73fabfd | 395 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
396 | goto error; |
397 | } | |
398 | } | |
399 | ||
400 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
401 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
402 | strncat(consumer->subdir, default_trace_dir, |
403 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
404 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
405 | } | |
406 | ||
407 | break; | |
408 | case LTTNG_DST_PATH: | |
409 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
410 | memset(consumer->dst.trace_path, 0, | |
411 | sizeof(consumer->dst.trace_path)); | |
412 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
413 | sizeof(consumer->dst.trace_path)); | |
414 | /* Append default trace dir */ | |
415 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
416 | sizeof(consumer->dst.trace_path) - |
417 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
418 | /* Flag consumer as local. */ |
419 | consumer->type = CONSUMER_DST_LOCAL; | |
420 | break; | |
421 | } | |
422 | ||
423 | error: | |
424 | return ret; | |
425 | } | |
426 | ||
427 | /* | |
428 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
429 | */ | |
430 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
431 | { | |
432 | int ret = 0; | |
433 | struct lttng_ht_iter iter; | |
434 | struct consumer_socket *socket; | |
435 | ||
436 | assert(session); | |
437 | ||
2219ef35 DG |
438 | rcu_read_lock(); |
439 | ||
2f77fc4b DG |
440 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
441 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
442 | socket, node.node) { | |
443 | /* Code flow error */ | |
444 | assert(socket->fd >= 0); | |
445 | ||
446 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 447 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
448 | pthread_mutex_unlock(socket->lock); |
449 | if (ret < 0) { | |
f73fabfd | 450 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
451 | goto error; |
452 | } | |
453 | } | |
454 | } | |
455 | ||
456 | error: | |
2219ef35 | 457 | rcu_read_unlock(); |
2f77fc4b DG |
458 | return ret; |
459 | } | |
460 | ||
461 | /* | |
462 | * Create a socket to the relayd using the URI. | |
463 | * | |
464 | * On success, the relayd_sock pointer is set to the created socket. | |
465 | * Else, it's stays untouched and a lttcomm error code is returned. | |
466 | */ | |
467 | static int create_connect_relayd(struct consumer_output *output, | |
468 | const char *session_name, struct lttng_uri *uri, | |
469 | struct lttcomm_sock **relayd_sock) | |
470 | { | |
471 | int ret; | |
472 | struct lttcomm_sock *sock; | |
473 | ||
474 | /* Create socket object from URI */ | |
475 | sock = lttcomm_alloc_sock_from_uri(uri); | |
476 | if (sock == NULL) { | |
f73fabfd | 477 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
478 | goto error; |
479 | } | |
480 | ||
481 | ret = lttcomm_create_sock(sock); | |
482 | if (ret < 0) { | |
f73fabfd | 483 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
484 | goto error; |
485 | } | |
486 | ||
487 | /* Connect to relayd so we can proceed with a session creation. */ | |
488 | ret = relayd_connect(sock); | |
489 | if (ret < 0) { | |
490 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 491 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
492 | goto free_sock; |
493 | } | |
494 | ||
495 | /* Create socket for control stream. */ | |
496 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
497 | DBG3("Creating relayd stream socket from URI"); | |
498 | ||
499 | /* Check relayd version */ | |
500 | ret = relayd_version_check(sock, RELAYD_VERSION_COMM_MAJOR, | |
501 | RELAYD_VERSION_COMM_MINOR); | |
502 | if (ret < 0) { | |
f73fabfd | 503 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
504 | goto close_sock; |
505 | } | |
506 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
507 | DBG3("Creating relayd data socket from URI"); | |
508 | } else { | |
509 | /* Command is not valid */ | |
510 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 511 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
512 | goto close_sock; |
513 | } | |
514 | ||
515 | *relayd_sock = sock; | |
516 | ||
f73fabfd | 517 | return LTTNG_OK; |
2f77fc4b DG |
518 | |
519 | close_sock: | |
520 | if (sock) { | |
521 | (void) relayd_close(sock); | |
522 | } | |
523 | free_sock: | |
524 | if (sock) { | |
525 | lttcomm_destroy_sock(sock); | |
526 | } | |
527 | error: | |
528 | return ret; | |
529 | } | |
530 | ||
531 | /* | |
532 | * Connect to the relayd using URI and send the socket to the right consumer. | |
533 | */ | |
534 | static int send_consumer_relayd_socket(int domain, struct ltt_session *session, | |
535 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
f50f23d9 | 536 | struct consumer_socket *consumer_sock) |
2f77fc4b DG |
537 | { |
538 | int ret; | |
539 | struct lttcomm_sock *sock = NULL; | |
540 | ||
541 | /* Set the network sequence index if not set. */ | |
542 | if (consumer->net_seq_index == -1) { | |
543 | /* | |
544 | * Increment net_seq_idx because we are about to transfer the | |
545 | * new relayd socket to the consumer. | |
546 | */ | |
547 | uatomic_inc(&relayd_net_seq_idx); | |
548 | /* Assign unique key so the consumer can match streams */ | |
549 | uatomic_set(&consumer->net_seq_index, | |
550 | uatomic_read(&relayd_net_seq_idx)); | |
551 | } | |
552 | ||
553 | /* Connect to relayd and make version check if uri is the control. */ | |
554 | ret = create_connect_relayd(consumer, session->name, relayd_uri, &sock); | |
f73fabfd | 555 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
556 | goto close_sock; |
557 | } | |
558 | ||
559 | /* If the control socket is connected, network session is ready */ | |
560 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
561 | session->net_handle = 1; | |
562 | } | |
563 | ||
564 | /* Send relayd socket to consumer. */ | |
f50f23d9 | 565 | ret = consumer_send_relayd_socket(consumer_sock, sock, |
46e6455f | 566 | consumer, relayd_uri->stype, session->id); |
2f77fc4b | 567 | if (ret < 0) { |
f73fabfd | 568 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
569 | goto close_sock; |
570 | } | |
571 | ||
c890b720 DG |
572 | /* Flag that the corresponding socket was sent. */ |
573 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
fd5a50b0 | 574 | consumer_sock->control_sock_sent = 1; |
c890b720 | 575 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
fd5a50b0 | 576 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
577 | } |
578 | ||
f73fabfd | 579 | ret = LTTNG_OK; |
2f77fc4b DG |
580 | |
581 | /* | |
582 | * Close socket which was dup on the consumer side. The session daemon does | |
583 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
584 | */ | |
585 | ||
586 | close_sock: | |
587 | if (sock) { | |
588 | (void) relayd_close(sock); | |
589 | lttcomm_destroy_sock(sock); | |
590 | } | |
591 | ||
592 | return ret; | |
593 | } | |
594 | ||
595 | /* | |
596 | * Send both relayd sockets to a specific consumer and domain. This is a | |
597 | * helper function to facilitate sending the information to the consumer for a | |
598 | * session. | |
599 | */ | |
600 | static int send_consumer_relayd_sockets(int domain, | |
f50f23d9 DG |
601 | struct ltt_session *session, struct consumer_output *consumer, |
602 | struct consumer_socket *sock) | |
2f77fc4b | 603 | { |
dda67f6c | 604 | int ret = LTTNG_OK; |
2f77fc4b DG |
605 | |
606 | assert(session); | |
607 | assert(consumer); | |
608 | ||
2f77fc4b | 609 | /* Sending control relayd socket. */ |
fd5a50b0 | 610 | if (!sock->control_sock_sent) { |
c890b720 | 611 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 612 | &consumer->dst.net.control, consumer, sock); |
c890b720 DG |
613 | if (ret != LTTNG_OK) { |
614 | goto error; | |
615 | } | |
2f77fc4b DG |
616 | } |
617 | ||
618 | /* Sending data relayd socket. */ | |
fd5a50b0 | 619 | if (!sock->data_sock_sent) { |
c890b720 | 620 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 621 | &consumer->dst.net.data, consumer, sock); |
c890b720 DG |
622 | if (ret != LTTNG_OK) { |
623 | goto error; | |
624 | } | |
2f77fc4b DG |
625 | } |
626 | ||
2f77fc4b DG |
627 | error: |
628 | return ret; | |
629 | } | |
630 | ||
631 | /* | |
632 | * Setup relayd connections for a tracing session. First creates the socket to | |
633 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
634 | * network. | |
635 | */ | |
636 | static int setup_relayd(struct ltt_session *session) | |
637 | { | |
f73fabfd | 638 | int ret = LTTNG_OK; |
2f77fc4b DG |
639 | struct ltt_ust_session *usess; |
640 | struct ltt_kernel_session *ksess; | |
641 | struct consumer_socket *socket; | |
642 | struct lttng_ht_iter iter; | |
643 | ||
644 | assert(session); | |
645 | ||
646 | usess = session->ust_session; | |
647 | ksess = session->kernel_session; | |
648 | ||
649 | DBG2("Setting relayd for session %s", session->name); | |
650 | ||
2219ef35 DG |
651 | rcu_read_lock(); |
652 | ||
2f77fc4b DG |
653 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
654 | && usess->consumer->enabled) { | |
655 | /* For each consumer socket, send relayd sockets */ | |
656 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
657 | socket, node.node) { | |
658 | /* Code flow error */ | |
659 | assert(socket->fd >= 0); | |
660 | ||
661 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 662 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session, |
f50f23d9 | 663 | usess->consumer, socket); |
2f77fc4b | 664 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 665 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
666 | goto error; |
667 | } | |
668 | } | |
669 | } | |
670 | ||
671 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
672 | && ksess->consumer->enabled) { | |
673 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
674 | socket, node.node) { | |
675 | /* Code flow error */ | |
676 | assert(socket->fd >= 0); | |
677 | ||
678 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 679 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session, |
f50f23d9 | 680 | ksess->consumer, socket); |
2f77fc4b | 681 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 682 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
683 | goto error; |
684 | } | |
685 | } | |
686 | } | |
687 | ||
688 | error: | |
2219ef35 | 689 | rcu_read_unlock(); |
2f77fc4b DG |
690 | return ret; |
691 | } | |
692 | ||
9b6c7ec5 DG |
693 | /* |
694 | * Start a kernel session by opening all necessary streams. | |
695 | */ | |
696 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
697 | { | |
698 | int ret; | |
699 | struct ltt_kernel_channel *kchan; | |
700 | ||
701 | /* Open kernel metadata */ | |
702 | if (ksess->metadata == NULL) { | |
703 | ret = kernel_open_metadata(ksess); | |
704 | if (ret < 0) { | |
705 | ret = LTTNG_ERR_KERN_META_FAIL; | |
706 | goto error; | |
707 | } | |
708 | } | |
709 | ||
710 | /* Open kernel metadata stream */ | |
711 | if (ksess->metadata_stream_fd < 0) { | |
712 | ret = kernel_open_metadata_stream(ksess); | |
713 | if (ret < 0) { | |
714 | ERR("Kernel create metadata stream failed"); | |
715 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
716 | goto error; | |
717 | } | |
718 | } | |
719 | ||
720 | /* For each channel */ | |
721 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
722 | if (kchan->stream_count == 0) { | |
723 | ret = kernel_open_channel_stream(kchan); | |
724 | if (ret < 0) { | |
725 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
726 | goto error; | |
727 | } | |
728 | /* Update the stream global counter */ | |
729 | ksess->stream_count_global += ret; | |
730 | } | |
731 | } | |
732 | ||
733 | /* Setup kernel consumer socket and send fds to it */ | |
734 | ret = init_kernel_tracing(ksess); | |
735 | if (ret < 0) { | |
736 | ret = LTTNG_ERR_KERN_START_FAIL; | |
737 | goto error; | |
738 | } | |
739 | ||
740 | /* This start the kernel tracing */ | |
741 | ret = kernel_start_session(ksess); | |
742 | if (ret < 0) { | |
743 | ret = LTTNG_ERR_KERN_START_FAIL; | |
744 | goto error; | |
745 | } | |
746 | ||
747 | /* Quiescent wait after starting trace */ | |
784303b0 | 748 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
749 | |
750 | ksess->started = 1; | |
751 | ||
752 | ret = LTTNG_OK; | |
753 | ||
754 | error: | |
755 | return ret; | |
756 | } | |
757 | ||
2f77fc4b DG |
758 | /* |
759 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
760 | */ | |
761 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
762 | char *channel_name) | |
763 | { | |
764 | int ret; | |
765 | struct ltt_ust_session *usess; | |
766 | ||
767 | usess = session->ust_session; | |
768 | ||
d861c907 DG |
769 | rcu_read_lock(); |
770 | ||
2f77fc4b DG |
771 | switch (domain) { |
772 | case LTTNG_DOMAIN_KERNEL: | |
773 | { | |
774 | ret = channel_kernel_disable(session->kernel_session, | |
775 | channel_name); | |
f73fabfd | 776 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
777 | goto error; |
778 | } | |
779 | ||
780 | kernel_wait_quiescent(kernel_tracer_fd); | |
781 | break; | |
782 | } | |
783 | case LTTNG_DOMAIN_UST: | |
784 | { | |
785 | struct ltt_ust_channel *uchan; | |
786 | struct lttng_ht *chan_ht; | |
787 | ||
788 | chan_ht = usess->domain_global.channels; | |
789 | ||
790 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
791 | if (uchan == NULL) { | |
f73fabfd | 792 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
793 | goto error; |
794 | } | |
795 | ||
796 | ret = channel_ust_disable(usess, domain, uchan); | |
f73fabfd | 797 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
798 | goto error; |
799 | } | |
800 | break; | |
801 | } | |
802 | #if 0 | |
803 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
804 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
805 | case LTTNG_DOMAIN_UST_PID: | |
806 | #endif | |
807 | default: | |
f73fabfd | 808 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
809 | goto error; |
810 | } | |
811 | ||
f73fabfd | 812 | ret = LTTNG_OK; |
2f77fc4b DG |
813 | |
814 | error: | |
d861c907 | 815 | rcu_read_unlock(); |
2f77fc4b DG |
816 | return ret; |
817 | } | |
818 | ||
819 | /* | |
820 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
821 | * | |
822 | * The wpipe arguments is used as a notifier for the kernel thread. | |
823 | */ | |
824 | int cmd_enable_channel(struct ltt_session *session, | |
825 | int domain, struct lttng_channel *attr, int wpipe) | |
826 | { | |
827 | int ret; | |
828 | struct ltt_ust_session *usess = session->ust_session; | |
829 | struct lttng_ht *chan_ht; | |
830 | ||
831 | assert(session); | |
832 | assert(attr); | |
833 | ||
834 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
835 | ||
d861c907 DG |
836 | rcu_read_lock(); |
837 | ||
2f77fc4b DG |
838 | switch (domain) { |
839 | case LTTNG_DOMAIN_KERNEL: | |
840 | { | |
841 | struct ltt_kernel_channel *kchan; | |
842 | ||
2f77fc4b DG |
843 | kchan = trace_kernel_get_channel_by_name(attr->name, |
844 | session->kernel_session); | |
845 | if (kchan == NULL) { | |
846 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
847 | } else { | |
848 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
849 | } | |
850 | ||
f73fabfd | 851 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
852 | goto error; |
853 | } | |
854 | ||
784303b0 | 855 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
856 | |
857 | /* | |
858 | * If the session was previously started, start as well this newly | |
859 | * created kernel session so the events/channels enabled *after* the | |
860 | * start actually work. | |
861 | */ | |
862 | if (session->started && !session->kernel_session->started) { | |
863 | ret = start_kernel_session(session->kernel_session, wpipe); | |
864 | if (ret != LTTNG_OK) { | |
865 | goto error; | |
866 | } | |
867 | } | |
2f77fc4b DG |
868 | break; |
869 | } | |
870 | case LTTNG_DOMAIN_UST: | |
871 | { | |
872 | struct ltt_ust_channel *uchan; | |
873 | ||
874 | chan_ht = usess->domain_global.channels; | |
875 | ||
876 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
877 | if (uchan == NULL) { | |
878 | ret = channel_ust_create(usess, domain, attr); | |
879 | } else { | |
880 | ret = channel_ust_enable(usess, domain, uchan); | |
881 | } | |
9b6c7ec5 DG |
882 | |
883 | /* Start the UST session if the session was already started. */ | |
884 | if (session->started && !usess->start_trace) { | |
885 | ret = ust_app_start_trace_all(usess); | |
886 | if (ret < 0) { | |
887 | ret = LTTNG_ERR_UST_START_FAIL; | |
888 | goto error; | |
889 | } | |
890 | ret = LTTNG_OK; | |
891 | usess->start_trace = 1; | |
892 | } | |
2f77fc4b DG |
893 | break; |
894 | } | |
895 | #if 0 | |
896 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
897 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
898 | case LTTNG_DOMAIN_UST_PID: | |
899 | #endif | |
900 | default: | |
f73fabfd | 901 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
902 | goto error; |
903 | } | |
904 | ||
905 | error: | |
d861c907 | 906 | rcu_read_unlock(); |
2f77fc4b DG |
907 | return ret; |
908 | } | |
909 | ||
910 | ||
911 | /* | |
912 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
913 | */ | |
914 | int cmd_disable_event(struct ltt_session *session, int domain, | |
915 | char *channel_name, char *event_name) | |
916 | { | |
917 | int ret; | |
918 | ||
d861c907 DG |
919 | rcu_read_lock(); |
920 | ||
2f77fc4b DG |
921 | switch (domain) { |
922 | case LTTNG_DOMAIN_KERNEL: | |
923 | { | |
924 | struct ltt_kernel_channel *kchan; | |
925 | struct ltt_kernel_session *ksess; | |
926 | ||
927 | ksess = session->kernel_session; | |
928 | ||
929 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
930 | if (kchan == NULL) { | |
f73fabfd | 931 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
932 | goto error; |
933 | } | |
934 | ||
935 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); | |
f73fabfd | 936 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
937 | goto error; |
938 | } | |
939 | ||
940 | kernel_wait_quiescent(kernel_tracer_fd); | |
941 | break; | |
942 | } | |
943 | case LTTNG_DOMAIN_UST: | |
944 | { | |
945 | struct ltt_ust_channel *uchan; | |
946 | struct ltt_ust_session *usess; | |
947 | ||
948 | usess = session->ust_session; | |
949 | ||
950 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
951 | channel_name); | |
952 | if (uchan == NULL) { | |
f73fabfd | 953 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
954 | goto error; |
955 | } | |
956 | ||
957 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); | |
f73fabfd | 958 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
959 | goto error; |
960 | } | |
961 | ||
962 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
963 | channel_name); | |
964 | break; | |
965 | } | |
966 | #if 0 | |
967 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
968 | case LTTNG_DOMAIN_UST_PID: | |
969 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
970 | #endif | |
971 | default: | |
f73fabfd | 972 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
973 | goto error; |
974 | } | |
975 | ||
f73fabfd | 976 | ret = LTTNG_OK; |
2f77fc4b DG |
977 | |
978 | error: | |
d861c907 | 979 | rcu_read_unlock(); |
2f77fc4b DG |
980 | return ret; |
981 | } | |
982 | ||
983 | /* | |
984 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
985 | */ | |
986 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
987 | char *channel_name) | |
988 | { | |
989 | int ret; | |
990 | ||
d861c907 DG |
991 | rcu_read_lock(); |
992 | ||
2f77fc4b DG |
993 | switch (domain) { |
994 | case LTTNG_DOMAIN_KERNEL: | |
995 | { | |
996 | struct ltt_kernel_session *ksess; | |
997 | struct ltt_kernel_channel *kchan; | |
998 | ||
999 | ksess = session->kernel_session; | |
1000 | ||
1001 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
1002 | if (kchan == NULL) { | |
f73fabfd | 1003 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1004 | goto error; |
1005 | } | |
1006 | ||
1007 | ret = event_kernel_disable_all(ksess, kchan); | |
f73fabfd | 1008 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1009 | goto error; |
1010 | } | |
1011 | ||
1012 | kernel_wait_quiescent(kernel_tracer_fd); | |
1013 | break; | |
1014 | } | |
1015 | case LTTNG_DOMAIN_UST: | |
1016 | { | |
1017 | struct ltt_ust_session *usess; | |
1018 | struct ltt_ust_channel *uchan; | |
1019 | ||
1020 | usess = session->ust_session; | |
1021 | ||
1022 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1023 | channel_name); | |
1024 | if (uchan == NULL) { | |
f73fabfd | 1025 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1026 | goto error; |
1027 | } | |
1028 | ||
1029 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); | |
1030 | if (ret != 0) { | |
1031 | goto error; | |
1032 | } | |
1033 | ||
1034 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1035 | ||
1036 | break; | |
1037 | } | |
1038 | #if 0 | |
1039 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1040 | case LTTNG_DOMAIN_UST_PID: | |
1041 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1042 | #endif | |
1043 | default: | |
f73fabfd | 1044 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1045 | goto error; |
1046 | } | |
1047 | ||
f73fabfd | 1048 | ret = LTTNG_OK; |
2f77fc4b DG |
1049 | |
1050 | error: | |
d861c907 | 1051 | rcu_read_unlock(); |
2f77fc4b DG |
1052 | return ret; |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1057 | */ | |
1058 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1059 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b DG |
1060 | { |
1061 | int ret; | |
1062 | ||
1063 | switch (domain) { | |
1064 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1065 | assert(session->kernel_session); |
1066 | ||
1067 | if (session->kernel_session->channel_count == 0) { | |
1068 | /* Create default channel */ | |
1069 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1070 | if (ret != LTTNG_OK) { | |
1071 | goto error; | |
1072 | } | |
1073 | } | |
1074 | ||
2f77fc4b | 1075 | /* Add kernel context to kernel tracer */ |
601d5acf | 1076 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1077 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1078 | goto error; |
1079 | } | |
1080 | break; | |
1081 | case LTTNG_DOMAIN_UST: | |
1082 | { | |
1083 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
1084 | assert(usess); |
1085 | ||
979e618e DG |
1086 | unsigned int chan_count = |
1087 | lttng_ht_get_count(usess->domain_global.channels); | |
1088 | if (chan_count == 0) { | |
1089 | struct lttng_channel *attr; | |
1090 | /* Create default channel */ | |
1091 | attr = channel_new_default_attr(domain); | |
1092 | if (attr == NULL) { | |
1093 | ret = LTTNG_ERR_FATAL; | |
1094 | goto error; | |
1095 | } | |
1096 | ||
1097 | ret = channel_ust_create(usess, domain, attr); | |
1098 | if (ret != LTTNG_OK) { | |
1099 | free(attr); | |
1100 | goto error; | |
1101 | } | |
1102 | free(attr); | |
1103 | } | |
1104 | ||
601d5acf | 1105 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1106 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1107 | goto error; |
1108 | } | |
1109 | break; | |
1110 | } | |
1111 | #if 0 | |
1112 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1113 | case LTTNG_DOMAIN_UST_PID: | |
1114 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1115 | #endif | |
1116 | default: | |
f73fabfd | 1117 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1118 | goto error; |
1119 | } | |
1120 | ||
f73fabfd | 1121 | ret = LTTNG_OK; |
2f77fc4b DG |
1122 | |
1123 | error: | |
1124 | return ret; | |
1125 | } | |
1126 | ||
2f77fc4b DG |
1127 | /* |
1128 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1129 | */ | |
1130 | int cmd_enable_event(struct ltt_session *session, int domain, | |
025faf73 DG |
1131 | char *channel_name, struct lttng_event *event, |
1132 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b DG |
1133 | { |
1134 | int ret; | |
1135 | struct lttng_channel *attr; | |
1136 | ||
1137 | assert(session); | |
1138 | assert(event); | |
1139 | assert(channel_name); | |
1140 | ||
d861c907 DG |
1141 | rcu_read_lock(); |
1142 | ||
2f77fc4b DG |
1143 | switch (domain) { |
1144 | case LTTNG_DOMAIN_KERNEL: | |
1145 | { | |
1146 | struct ltt_kernel_channel *kchan; | |
1147 | ||
1148 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1149 | session->kernel_session); | |
1150 | if (kchan == NULL) { | |
1151 | attr = channel_new_default_attr(domain); | |
1152 | if (attr == NULL) { | |
f73fabfd | 1153 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1154 | goto error; |
1155 | } | |
1156 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1157 | ||
1158 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1159 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1160 | free(attr); |
1161 | goto error; | |
1162 | } | |
1163 | free(attr); | |
1164 | } | |
1165 | ||
1166 | /* Get the newly created kernel channel pointer */ | |
1167 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1168 | session->kernel_session); | |
1169 | if (kchan == NULL) { | |
1170 | /* This sould not happen... */ | |
f73fabfd | 1171 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1172 | goto error; |
1173 | } | |
1174 | ||
1175 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, | |
1176 | event); | |
f73fabfd | 1177 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1178 | goto error; |
1179 | } | |
1180 | ||
1181 | kernel_wait_quiescent(kernel_tracer_fd); | |
1182 | break; | |
1183 | } | |
1184 | case LTTNG_DOMAIN_UST: | |
1185 | { | |
1186 | struct ltt_ust_channel *uchan; | |
1187 | struct ltt_ust_session *usess = session->ust_session; | |
1188 | ||
1189 | assert(usess); | |
1190 | ||
1191 | /* Get channel from global UST domain */ | |
1192 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1193 | channel_name); | |
1194 | if (uchan == NULL) { | |
1195 | /* Create default channel */ | |
1196 | attr = channel_new_default_attr(domain); | |
1197 | if (attr == NULL) { | |
f73fabfd | 1198 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1199 | goto error; |
1200 | } | |
1201 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1202 | ||
1203 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1204 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1205 | free(attr); |
1206 | goto error; | |
1207 | } | |
1208 | free(attr); | |
1209 | ||
1210 | /* Get the newly created channel reference back */ | |
1211 | uchan = trace_ust_find_channel_by_name( | |
1212 | usess->domain_global.channels, channel_name); | |
1213 | assert(uchan); | |
1214 | } | |
1215 | ||
1216 | /* At this point, the session and channel exist on the tracer */ | |
025faf73 | 1217 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event, filter); |
f73fabfd | 1218 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1219 | goto error; |
1220 | } | |
1221 | break; | |
1222 | } | |
1223 | #if 0 | |
1224 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1225 | case LTTNG_DOMAIN_UST_PID: | |
1226 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1227 | #endif | |
1228 | default: | |
f73fabfd | 1229 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1230 | goto error; |
1231 | } | |
1232 | ||
f73fabfd | 1233 | ret = LTTNG_OK; |
2f77fc4b DG |
1234 | |
1235 | error: | |
d861c907 | 1236 | rcu_read_unlock(); |
2f77fc4b DG |
1237 | return ret; |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1242 | */ | |
1243 | int cmd_enable_event_all(struct ltt_session *session, int domain, | |
025faf73 DG |
1244 | char *channel_name, int event_type, |
1245 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b DG |
1246 | { |
1247 | int ret; | |
1248 | struct lttng_channel *attr; | |
1249 | ||
1250 | assert(session); | |
1251 | assert(channel_name); | |
1252 | ||
d861c907 DG |
1253 | rcu_read_lock(); |
1254 | ||
2f77fc4b DG |
1255 | switch (domain) { |
1256 | case LTTNG_DOMAIN_KERNEL: | |
1257 | { | |
1258 | struct ltt_kernel_channel *kchan; | |
1259 | ||
1260 | assert(session->kernel_session); | |
1261 | ||
1262 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1263 | session->kernel_session); | |
1264 | if (kchan == NULL) { | |
1265 | /* Create default channel */ | |
1266 | attr = channel_new_default_attr(domain); | |
1267 | if (attr == NULL) { | |
f73fabfd | 1268 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1269 | goto error; |
1270 | } | |
1271 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1272 | ||
1273 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1274 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1275 | free(attr); |
1276 | goto error; | |
1277 | } | |
1278 | free(attr); | |
1279 | ||
1280 | /* Get the newly created kernel channel pointer */ | |
1281 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1282 | session->kernel_session); | |
1283 | assert(kchan); | |
1284 | } | |
1285 | ||
1286 | switch (event_type) { | |
1287 | case LTTNG_EVENT_SYSCALL: | |
1288 | ret = event_kernel_enable_all_syscalls(session->kernel_session, | |
1289 | kchan, kernel_tracer_fd); | |
1290 | break; | |
1291 | case LTTNG_EVENT_TRACEPOINT: | |
1292 | /* | |
1293 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1294 | * events already registered to the channel. | |
1295 | */ | |
1296 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, | |
1297 | kchan, kernel_tracer_fd); | |
1298 | break; | |
1299 | case LTTNG_EVENT_ALL: | |
1300 | /* Enable syscalls and tracepoints */ | |
1301 | ret = event_kernel_enable_all(session->kernel_session, | |
1302 | kchan, kernel_tracer_fd); | |
1303 | break; | |
1304 | default: | |
f73fabfd | 1305 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1306 | goto error; |
1307 | } | |
1308 | ||
1309 | /* Manage return value */ | |
f73fabfd | 1310 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1311 | goto error; |
1312 | } | |
1313 | ||
1314 | kernel_wait_quiescent(kernel_tracer_fd); | |
1315 | break; | |
1316 | } | |
1317 | case LTTNG_DOMAIN_UST: | |
1318 | { | |
1319 | struct ltt_ust_channel *uchan; | |
1320 | struct ltt_ust_session *usess = session->ust_session; | |
1321 | ||
1322 | assert(usess); | |
1323 | ||
1324 | /* Get channel from global UST domain */ | |
1325 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1326 | channel_name); | |
1327 | if (uchan == NULL) { | |
1328 | /* Create default channel */ | |
1329 | attr = channel_new_default_attr(domain); | |
1330 | if (attr == NULL) { | |
f73fabfd | 1331 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1332 | goto error; |
1333 | } | |
1334 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1335 | ||
1336 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1337 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1338 | free(attr); |
1339 | goto error; | |
1340 | } | |
1341 | free(attr); | |
1342 | ||
1343 | /* Get the newly created channel reference back */ | |
1344 | uchan = trace_ust_find_channel_by_name( | |
1345 | usess->domain_global.channels, channel_name); | |
1346 | assert(uchan); | |
1347 | } | |
1348 | ||
1349 | /* At this point, the session and channel exist on the tracer */ | |
1350 | ||
1351 | switch (event_type) { | |
1352 | case LTTNG_EVENT_ALL: | |
1353 | case LTTNG_EVENT_TRACEPOINT: | |
025faf73 DG |
1354 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan, |
1355 | filter); | |
f73fabfd | 1356 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1357 | goto error; |
1358 | } | |
1359 | break; | |
1360 | default: | |
f73fabfd | 1361 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1362 | goto error; |
1363 | } | |
1364 | ||
1365 | /* Manage return value */ | |
f73fabfd | 1366 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1367 | goto error; |
1368 | } | |
1369 | ||
1370 | break; | |
1371 | } | |
1372 | #if 0 | |
1373 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1374 | case LTTNG_DOMAIN_UST_PID: | |
1375 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1376 | #endif | |
1377 | default: | |
f73fabfd | 1378 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1379 | goto error; |
1380 | } | |
1381 | ||
f73fabfd | 1382 | ret = LTTNG_OK; |
2f77fc4b DG |
1383 | |
1384 | error: | |
d861c907 | 1385 | rcu_read_unlock(); |
2f77fc4b DG |
1386 | return ret; |
1387 | } | |
1388 | ||
1389 | ||
1390 | /* | |
1391 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1392 | */ | |
1393 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1394 | { | |
1395 | int ret; | |
1396 | ssize_t nb_events = 0; | |
1397 | ||
1398 | switch (domain) { | |
1399 | case LTTNG_DOMAIN_KERNEL: | |
1400 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1401 | if (nb_events < 0) { | |
f73fabfd | 1402 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1403 | goto error; |
1404 | } | |
1405 | break; | |
1406 | case LTTNG_DOMAIN_UST: | |
1407 | nb_events = ust_app_list_events(events); | |
1408 | if (nb_events < 0) { | |
f73fabfd | 1409 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1410 | goto error; |
1411 | } | |
1412 | break; | |
1413 | default: | |
f73fabfd | 1414 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1415 | goto error; |
1416 | } | |
1417 | ||
1418 | return nb_events; | |
1419 | ||
1420 | error: | |
1421 | /* Return negative value to differentiate return code */ | |
1422 | return -ret; | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1427 | */ | |
1428 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1429 | struct lttng_event_field **fields) | |
1430 | { | |
1431 | int ret; | |
1432 | ssize_t nb_fields = 0; | |
1433 | ||
1434 | switch (domain) { | |
1435 | case LTTNG_DOMAIN_UST: | |
1436 | nb_fields = ust_app_list_event_fields(fields); | |
1437 | if (nb_fields < 0) { | |
f73fabfd | 1438 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1439 | goto error; |
1440 | } | |
1441 | break; | |
1442 | case LTTNG_DOMAIN_KERNEL: | |
1443 | default: /* fall-through */ | |
f73fabfd | 1444 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1445 | goto error; |
1446 | } | |
1447 | ||
1448 | return nb_fields; | |
1449 | ||
1450 | error: | |
1451 | /* Return negative value to differentiate return code */ | |
1452 | return -ret; | |
1453 | } | |
1454 | ||
1455 | /* | |
1456 | * Command LTTNG_START_TRACE processed by the client thread. | |
1457 | */ | |
1458 | int cmd_start_trace(struct ltt_session *session) | |
1459 | { | |
1460 | int ret; | |
1461 | struct ltt_kernel_session *ksession; | |
1462 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1463 | |
1464 | assert(session); | |
1465 | ||
1466 | /* Ease our life a bit ;) */ | |
1467 | ksession = session->kernel_session; | |
1468 | usess = session->ust_session; | |
1469 | ||
1470 | if (session->enabled) { | |
1471 | /* Already started. */ | |
f73fabfd | 1472 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1473 | goto error; |
1474 | } | |
1475 | ||
1476 | session->enabled = 1; | |
1477 | ||
1478 | ret = setup_relayd(session); | |
f73fabfd | 1479 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1480 | ERR("Error setting up relayd for session %s", session->name); |
1481 | goto error; | |
1482 | } | |
1483 | ||
1484 | /* Kernel tracing */ | |
1485 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1486 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1487 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1488 | goto error; |
1489 | } | |
2f77fc4b DG |
1490 | } |
1491 | ||
1492 | /* Flag session that trace should start automatically */ | |
1493 | if (usess) { | |
1494 | usess->start_trace = 1; | |
1495 | ||
1496 | ret = ust_app_start_trace_all(usess); | |
1497 | if (ret < 0) { | |
f73fabfd | 1498 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1499 | goto error; |
1500 | } | |
1501 | } | |
1502 | ||
9b6c7ec5 DG |
1503 | session->started = 1; |
1504 | ||
f73fabfd | 1505 | ret = LTTNG_OK; |
2f77fc4b DG |
1506 | |
1507 | error: | |
1508 | return ret; | |
1509 | } | |
1510 | ||
1511 | /* | |
1512 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1513 | */ | |
1514 | int cmd_stop_trace(struct ltt_session *session) | |
1515 | { | |
1516 | int ret; | |
1517 | struct ltt_kernel_channel *kchan; | |
1518 | struct ltt_kernel_session *ksession; | |
1519 | struct ltt_ust_session *usess; | |
1520 | ||
1521 | assert(session); | |
1522 | ||
1523 | /* Short cut */ | |
1524 | ksession = session->kernel_session; | |
1525 | usess = session->ust_session; | |
1526 | ||
1527 | if (!session->enabled) { | |
f73fabfd | 1528 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1529 | goto error; |
1530 | } | |
1531 | ||
1532 | session->enabled = 0; | |
1533 | ||
1534 | /* Kernel tracer */ | |
1535 | if (ksession) { | |
1536 | DBG("Stop kernel tracing"); | |
1537 | ||
1538 | /* Flush metadata if exist */ | |
1539 | if (ksession->metadata_stream_fd >= 0) { | |
1540 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1541 | if (ret < 0) { | |
1542 | ERR("Kernel metadata flush failed"); | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | /* Flush all buffers before stopping */ | |
1547 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1548 | ret = kernel_flush_buffer(kchan); | |
1549 | if (ret < 0) { | |
1550 | ERR("Kernel flush buffer error"); | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | ret = kernel_stop_session(ksession); | |
1555 | if (ret < 0) { | |
f73fabfd | 1556 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1557 | goto error; |
1558 | } | |
1559 | ||
1560 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 DG |
1561 | |
1562 | ksession->started = 0; | |
2f77fc4b DG |
1563 | } |
1564 | ||
1565 | if (usess) { | |
1566 | usess->start_trace = 0; | |
1567 | ||
1568 | ret = ust_app_stop_trace_all(usess); | |
1569 | if (ret < 0) { | |
f73fabfd | 1570 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1571 | goto error; |
1572 | } | |
1573 | } | |
1574 | ||
9b6c7ec5 DG |
1575 | session->started = 0; |
1576 | ||
f73fabfd | 1577 | ret = LTTNG_OK; |
2f77fc4b DG |
1578 | |
1579 | error: | |
1580 | return ret; | |
1581 | } | |
1582 | ||
1583 | /* | |
1584 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1585 | */ | |
1586 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1587 | size_t nb_uri, struct lttng_uri *uris) | |
1588 | { | |
1589 | int ret, i; | |
1590 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1591 | struct ltt_ust_session *usess = session->ust_session; | |
1592 | struct consumer_output *consumer = NULL; | |
1593 | ||
1594 | assert(session); | |
1595 | assert(uris); | |
1596 | assert(nb_uri > 0); | |
1597 | ||
1598 | /* Can't enable consumer after session started. */ | |
1599 | if (session->enabled) { | |
f73fabfd | 1600 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1601 | goto error; |
1602 | } | |
1603 | ||
2f77fc4b DG |
1604 | /* |
1605 | * This case switch makes sure the domain session has a temporary consumer | |
1606 | * so the URL can be set. | |
1607 | */ | |
1608 | switch (domain) { | |
1609 | case 0: | |
1610 | /* Code flow error. A session MUST always have a consumer object */ | |
1611 | assert(session->consumer); | |
1612 | /* | |
1613 | * The URL will be added to the tracing session consumer instead of a | |
1614 | * specific domain consumer. | |
1615 | */ | |
1616 | consumer = session->consumer; | |
1617 | break; | |
1618 | case LTTNG_DOMAIN_KERNEL: | |
1619 | /* Code flow error if we don't have a kernel session here. */ | |
1620 | assert(ksess); | |
1621 | ||
1622 | /* Create consumer output if none exists */ | |
1623 | consumer = ksess->tmp_consumer; | |
1624 | if (consumer == NULL) { | |
1625 | consumer = consumer_copy_output(ksess->consumer); | |
1626 | if (consumer == NULL) { | |
f73fabfd | 1627 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1628 | goto error; |
1629 | } | |
1630 | /* Trash the consumer subdir, we are about to set a new one. */ | |
1631 | memset(consumer->subdir, 0, sizeof(consumer->subdir)); | |
1632 | ksess->tmp_consumer = consumer; | |
1633 | } | |
1634 | ||
1635 | break; | |
1636 | case LTTNG_DOMAIN_UST: | |
1637 | /* Code flow error if we don't have a kernel session here. */ | |
1638 | assert(usess); | |
1639 | ||
1640 | /* Create consumer output if none exists */ | |
1641 | consumer = usess->tmp_consumer; | |
1642 | if (consumer == NULL) { | |
1643 | consumer = consumer_copy_output(usess->consumer); | |
1644 | if (consumer == NULL) { | |
f73fabfd | 1645 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1646 | goto error; |
1647 | } | |
1648 | /* Trash the consumer subdir, we are about to set a new one. */ | |
1649 | memset(consumer->subdir, 0, sizeof(consumer->subdir)); | |
1650 | usess->tmp_consumer = consumer; | |
1651 | } | |
1652 | ||
1653 | break; | |
1654 | } | |
1655 | ||
1656 | for (i = 0; i < nb_uri; i++) { | |
1657 | struct consumer_socket *socket; | |
1658 | struct lttng_ht_iter iter; | |
1659 | ||
1660 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); | |
1661 | if (ret < 0) { | |
1662 | goto error; | |
1663 | } | |
1664 | ||
fd5a50b0 DG |
1665 | /* Don't send relayd socket if URI is NOT remote */ |
1666 | if (uris[i].dtype == LTTNG_DST_PATH) { | |
2f77fc4b DG |
1667 | continue; |
1668 | } | |
1669 | ||
1670 | /* Try to send relayd URI to the consumer if exist. */ | |
1671 | rcu_read_lock(); | |
1672 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, | |
1673 | socket, node.node) { | |
1674 | ||
1675 | /* A socket in the HT should never have a negative fd */ | |
1676 | assert(socket->fd >= 0); | |
1677 | ||
1678 | pthread_mutex_lock(socket->lock); | |
1679 | ret = send_consumer_relayd_socket(domain, session, &uris[i], | |
f50f23d9 | 1680 | consumer, socket); |
2f77fc4b | 1681 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1682 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1683 | rcu_read_unlock(); |
1684 | goto error; | |
1685 | } | |
1686 | } | |
1687 | rcu_read_unlock(); | |
1688 | } | |
1689 | ||
1690 | /* All good! */ | |
f73fabfd | 1691 | ret = LTTNG_OK; |
2f77fc4b DG |
1692 | |
1693 | error: | |
1694 | return ret; | |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1699 | */ | |
1700 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
1701 | size_t nb_uri, lttng_sock_cred *creds) | |
1702 | { | |
1703 | int ret; | |
1704 | char *path = NULL; | |
1705 | struct ltt_session *session; | |
1706 | ||
1707 | assert(name); | |
1708 | ||
1709 | /* | |
1710 | * Verify if the session already exist | |
1711 | * | |
1712 | * XXX: There is no need for the session lock list here since the caller | |
1713 | * (process_client_msg) is holding it. We might want to change that so a | |
1714 | * single command does not lock the entire session list. | |
1715 | */ | |
1716 | session = session_find_by_name(name); | |
1717 | if (session != NULL) { | |
f73fabfd | 1718 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1719 | goto find_error; |
1720 | } | |
1721 | ||
1722 | /* Create tracing session in the registry */ | |
1723 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), | |
1724 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
f73fabfd | 1725 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1726 | goto session_error; |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | * Get the newly created session pointer back | |
1731 | * | |
1732 | * XXX: There is no need for the session lock list here since the caller | |
1733 | * (process_client_msg) is holding it. We might want to change that so a | |
1734 | * single command does not lock the entire session list. | |
1735 | */ | |
1736 | session = session_find_by_name(name); | |
1737 | assert(session); | |
1738 | ||
1739 | /* Create default consumer output for the session not yet created. */ | |
1740 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1741 | if (session->consumer == NULL) { | |
f73fabfd | 1742 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1743 | goto consumer_error; |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * This means that the lttng_create_session call was called with the _path_ | |
1748 | * argument set to NULL. | |
1749 | */ | |
1750 | if (uris == NULL) { | |
1751 | /* | |
1752 | * At this point, we'll skip the consumer URI setup and create a | |
1753 | * session with a NULL path which will flag the session to NOT spawn a | |
1754 | * consumer. | |
1755 | */ | |
1756 | DBG("Create session %s with NO uri, skipping consumer setup", name); | |
1757 | goto end; | |
1758 | } | |
1759 | ||
1760 | session->start_consumer = 1; | |
1761 | ||
1762 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
f73fabfd | 1763 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1764 | goto consumer_error; |
1765 | } | |
1766 | ||
1767 | session->consumer->enabled = 1; | |
1768 | ||
1769 | end: | |
f73fabfd | 1770 | return LTTNG_OK; |
2f77fc4b DG |
1771 | |
1772 | consumer_error: | |
1773 | session_destroy(session); | |
1774 | session_error: | |
1775 | find_error: | |
1776 | return ret; | |
1777 | } | |
1778 | ||
1779 | /* | |
1780 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1781 | */ | |
1782 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1783 | { | |
1784 | int ret; | |
1785 | struct ltt_ust_session *usess; | |
1786 | struct ltt_kernel_session *ksess; | |
1787 | ||
1788 | /* Safety net */ | |
1789 | assert(session); | |
1790 | ||
1791 | usess = session->ust_session; | |
1792 | ksess = session->kernel_session; | |
1793 | ||
1794 | /* Clean kernel session teardown */ | |
1795 | kernel_destroy_session(ksess); | |
1796 | ||
1797 | /* UST session teardown */ | |
1798 | if (usess) { | |
1799 | /* Close any relayd session */ | |
1800 | consumer_output_send_destroy_relayd(usess->consumer); | |
1801 | ||
1802 | /* Destroy every UST application related to this session. */ | |
1803 | ret = ust_app_destroy_trace_all(usess); | |
1804 | if (ret) { | |
1805 | ERR("Error in ust_app_destroy_trace_all"); | |
1806 | } | |
1807 | ||
1808 | /* Clean up the rest. */ | |
1809 | trace_ust_destroy_session(usess); | |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * Must notify the kernel thread here to update it's poll set in order to | |
1814 | * remove the channel(s)' fd just destroyed. | |
1815 | */ | |
1816 | ret = notify_thread_pipe(wpipe); | |
1817 | if (ret < 0) { | |
1818 | PERROR("write kernel poll pipe"); | |
1819 | } | |
1820 | ||
1821 | ret = session_destroy(session); | |
1822 | ||
1823 | return ret; | |
1824 | } | |
1825 | ||
1826 | /* | |
1827 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1828 | */ | |
1829 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1830 | { | |
1831 | int ret; | |
1832 | ||
1833 | switch (domain) { | |
1834 | case LTTNG_DOMAIN_KERNEL: | |
1835 | { | |
1836 | struct lttng_kernel_calibrate kcalibrate; | |
1837 | ||
1838 | kcalibrate.type = calibrate->type; | |
1839 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1840 | if (ret < 0) { | |
f73fabfd | 1841 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1842 | goto error; |
1843 | } | |
1844 | break; | |
1845 | } | |
1846 | case LTTNG_DOMAIN_UST: | |
1847 | { | |
1848 | struct lttng_ust_calibrate ucalibrate; | |
1849 | ||
1850 | ucalibrate.type = calibrate->type; | |
1851 | ret = ust_app_calibrate_glb(&ucalibrate); | |
1852 | if (ret < 0) { | |
f73fabfd | 1853 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
1854 | goto error; |
1855 | } | |
1856 | break; | |
1857 | } | |
1858 | default: | |
f73fabfd | 1859 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1860 | goto error; |
1861 | } | |
1862 | ||
f73fabfd | 1863 | ret = LTTNG_OK; |
2f77fc4b DG |
1864 | |
1865 | error: | |
1866 | return ret; | |
1867 | } | |
1868 | ||
1869 | /* | |
1870 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
1871 | */ | |
1872 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
1873 | const char *sock_path, struct consumer_data *cdata) | |
1874 | { | |
1875 | int ret, sock; | |
1876 | struct consumer_socket *socket; | |
1877 | ||
1878 | assert(session); | |
1879 | assert(cdata); | |
1880 | assert(sock_path); | |
1881 | ||
1882 | switch (domain) { | |
1883 | case LTTNG_DOMAIN_KERNEL: | |
1884 | { | |
1885 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1886 | ||
1887 | assert(ksess); | |
1888 | ||
1889 | /* Can't register a consumer if there is already one */ | |
1890 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 1891 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
1892 | goto error; |
1893 | } | |
1894 | ||
1895 | sock = lttcomm_connect_unix_sock(sock_path); | |
1896 | if (sock < 0) { | |
f73fabfd | 1897 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
1898 | goto error; |
1899 | } | |
1900 | ||
1901 | socket = consumer_allocate_socket(sock); | |
1902 | if (socket == NULL) { | |
f66c074c DG |
1903 | ret = close(sock); |
1904 | if (ret < 0) { | |
1905 | PERROR("close register consumer"); | |
1906 | } | |
f73fabfd | 1907 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1908 | goto error; |
1909 | } | |
1910 | ||
1911 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
1912 | if (socket->lock == NULL) { | |
1913 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 1914 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1915 | goto error; |
1916 | } | |
1917 | pthread_mutex_init(socket->lock, NULL); | |
1918 | socket->registered = 1; | |
1919 | ||
1920 | rcu_read_lock(); | |
1921 | consumer_add_socket(socket, ksess->consumer); | |
1922 | rcu_read_unlock(); | |
1923 | ||
1924 | pthread_mutex_lock(&cdata->pid_mutex); | |
1925 | cdata->pid = -1; | |
1926 | pthread_mutex_unlock(&cdata->pid_mutex); | |
1927 | ||
1928 | break; | |
1929 | } | |
1930 | default: | |
1931 | /* TODO: Userspace tracing */ | |
f73fabfd | 1932 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1933 | goto error; |
1934 | } | |
1935 | ||
f73fabfd | 1936 | ret = LTTNG_OK; |
2f77fc4b DG |
1937 | |
1938 | error: | |
1939 | return ret; | |
1940 | } | |
1941 | ||
1942 | /* | |
1943 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
1944 | */ | |
1945 | ssize_t cmd_list_domains(struct ltt_session *session, | |
1946 | struct lttng_domain **domains) | |
1947 | { | |
1948 | int ret, index = 0; | |
1949 | ssize_t nb_dom = 0; | |
1950 | ||
1951 | if (session->kernel_session != NULL) { | |
1952 | DBG3("Listing domains found kernel domain"); | |
1953 | nb_dom++; | |
1954 | } | |
1955 | ||
1956 | if (session->ust_session != NULL) { | |
1957 | DBG3("Listing domains found UST global domain"); | |
1958 | nb_dom++; | |
1959 | } | |
1960 | ||
1961 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
1962 | if (*domains == NULL) { | |
f73fabfd | 1963 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1964 | goto error; |
1965 | } | |
1966 | ||
1967 | if (session->kernel_session != NULL) { | |
1968 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
1969 | index++; | |
1970 | } | |
1971 | ||
1972 | if (session->ust_session != NULL) { | |
1973 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
1974 | index++; | |
1975 | } | |
1976 | ||
1977 | return nb_dom; | |
1978 | ||
1979 | error: | |
f73fabfd DG |
1980 | /* Return negative value to differentiate return code */ |
1981 | return -ret; | |
2f77fc4b DG |
1982 | } |
1983 | ||
1984 | ||
1985 | /* | |
1986 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
1987 | */ | |
1988 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
1989 | struct lttng_channel **channels) | |
1990 | { | |
1991 | int ret; | |
1992 | ssize_t nb_chan = 0; | |
1993 | ||
1994 | switch (domain) { | |
1995 | case LTTNG_DOMAIN_KERNEL: | |
1996 | if (session->kernel_session != NULL) { | |
1997 | nb_chan = session->kernel_session->channel_count; | |
1998 | } | |
1999 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2000 | if (nb_chan <= 0) { |
2001 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2002 | } | |
2f77fc4b DG |
2003 | break; |
2004 | case LTTNG_DOMAIN_UST: | |
2005 | if (session->ust_session != NULL) { | |
2006 | nb_chan = lttng_ht_get_count( | |
2007 | session->ust_session->domain_global.channels); | |
2008 | } | |
2009 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
2010 | if (nb_chan <= 0) { |
2011 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2012 | } | |
2f77fc4b DG |
2013 | break; |
2014 | default: | |
2015 | *channels = NULL; | |
f73fabfd | 2016 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2017 | goto error; |
2018 | } | |
2019 | ||
2020 | if (nb_chan > 0) { | |
2021 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2022 | if (*channels == NULL) { | |
f73fabfd | 2023 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2024 | goto error; |
2025 | } | |
2026 | ||
2027 | list_lttng_channels(domain, session, *channels); | |
2028 | } else { | |
2029 | *channels = NULL; | |
c7d620a2 DG |
2030 | /* Ret value was set in the domain switch case */ |
2031 | goto error; | |
2f77fc4b DG |
2032 | } |
2033 | ||
2034 | return nb_chan; | |
2035 | ||
2036 | error: | |
f73fabfd DG |
2037 | /* Return negative value to differentiate return code */ |
2038 | return -ret; | |
2f77fc4b DG |
2039 | } |
2040 | ||
2041 | /* | |
2042 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2043 | */ | |
2044 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2045 | char *channel_name, struct lttng_event **events) | |
2046 | { | |
2047 | int ret = 0; | |
2048 | ssize_t nb_event = 0; | |
2049 | ||
2050 | switch (domain) { | |
2051 | case LTTNG_DOMAIN_KERNEL: | |
2052 | if (session->kernel_session != NULL) { | |
2053 | nb_event = list_lttng_kernel_events(channel_name, | |
2054 | session->kernel_session, events); | |
2055 | } | |
2056 | break; | |
2057 | case LTTNG_DOMAIN_UST: | |
2058 | { | |
2059 | if (session->ust_session != NULL) { | |
2060 | nb_event = list_lttng_ust_global_events(channel_name, | |
2061 | &session->ust_session->domain_global, events); | |
2062 | } | |
2063 | break; | |
2064 | } | |
2065 | default: | |
f73fabfd | 2066 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2067 | goto error; |
2068 | } | |
2069 | ||
f73fabfd | 2070 | return nb_event; |
2f77fc4b DG |
2071 | |
2072 | error: | |
f73fabfd DG |
2073 | /* Return negative value to differentiate return code */ |
2074 | return -ret; | |
2f77fc4b DG |
2075 | } |
2076 | ||
2077 | /* | |
2078 | * Using the session list, filled a lttng_session array to send back to the | |
2079 | * client for session listing. | |
2080 | * | |
2081 | * The session list lock MUST be acquired before calling this function. Use | |
2082 | * session_lock_list() and session_unlock_list(). | |
2083 | */ | |
2084 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2085 | gid_t gid) | |
2086 | { | |
2087 | int ret; | |
2088 | unsigned int i = 0; | |
2089 | struct ltt_session *session; | |
2090 | struct ltt_session_list *list = session_get_list(); | |
2091 | ||
2092 | DBG("Getting all available session for UID %d GID %d", | |
2093 | uid, gid); | |
2094 | /* | |
2095 | * Iterate over session list and append data after the control struct in | |
2096 | * the buffer. | |
2097 | */ | |
2098 | cds_list_for_each_entry(session, &list->head, list) { | |
2099 | /* | |
2100 | * Only list the sessions the user can control. | |
2101 | */ | |
2102 | if (!session_access_ok(session, uid, gid)) { | |
2103 | continue; | |
2104 | } | |
2105 | ||
2106 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2107 | struct ltt_ust_session *usess = session->ust_session; | |
2108 | ||
2109 | if (session->consumer->type == CONSUMER_DST_NET || | |
2110 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2111 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2112 | ret = build_network_session_path(sessions[i].path, | |
2113 | sizeof(session[i].path), session); | |
2114 | } else { | |
2115 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2116 | session->consumer->dst.trace_path); | |
2117 | } | |
2118 | if (ret < 0) { | |
2119 | PERROR("snprintf session path"); | |
2120 | continue; | |
2121 | } | |
2122 | ||
2123 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2124 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2125 | sessions[i].enabled = session->enabled; | |
2126 | i++; | |
2127 | } | |
2128 | } | |
2129 | ||
2130 | /* | |
2131 | * Command LTTNG_DISABLE_CONSUMER processed by the client thread. | |
2132 | */ | |
2133 | int cmd_disable_consumer(int domain, struct ltt_session *session) | |
2134 | { | |
2135 | int ret; | |
2136 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2137 | struct ltt_ust_session *usess = session->ust_session; | |
2138 | struct consumer_output *consumer; | |
2139 | ||
2140 | assert(session); | |
2141 | ||
2142 | if (session->enabled) { | |
2143 | /* Can't disable consumer on an already started session */ | |
f73fabfd | 2144 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2145 | goto error; |
2146 | } | |
2147 | ||
2148 | if (!session->start_consumer) { | |
f73fabfd | 2149 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2150 | goto error; |
2151 | } | |
2152 | ||
2153 | switch (domain) { | |
2154 | case 0: | |
2155 | DBG("Disable tracing session %s consumer", session->name); | |
2156 | consumer = session->consumer; | |
2157 | break; | |
2158 | case LTTNG_DOMAIN_KERNEL: | |
2159 | /* Code flow error if we don't have a kernel session here. */ | |
2160 | assert(ksess); | |
2161 | ||
2162 | DBG("Disabling kernel consumer"); | |
2163 | consumer = ksess->consumer; | |
2164 | ||
2165 | break; | |
2166 | case LTTNG_DOMAIN_UST: | |
2167 | /* Code flow error if we don't have a UST session here. */ | |
2168 | assert(usess); | |
2169 | ||
2170 | DBG("Disabling UST consumer"); | |
2171 | consumer = usess->consumer; | |
2172 | ||
2173 | break; | |
2174 | default: | |
f73fabfd | 2175 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
2176 | goto error; |
2177 | } | |
2178 | ||
2179 | if (consumer) { | |
2180 | consumer->enabled = 0; | |
2181 | /* Success at this point */ | |
f73fabfd | 2182 | ret = LTTNG_OK; |
2f77fc4b | 2183 | } else { |
f73fabfd | 2184 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2185 | } |
2186 | ||
2187 | error: | |
2188 | return ret; | |
2189 | } | |
2190 | ||
2191 | /* | |
2192 | * Command LTTNG_ENABLE_CONSUMER processed by the client thread. | |
2193 | */ | |
2194 | int cmd_enable_consumer(int domain, struct ltt_session *session) | |
2195 | { | |
2196 | int ret; | |
2197 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2198 | struct ltt_ust_session *usess = session->ust_session; | |
2199 | struct consumer_output *consumer = NULL; | |
2200 | ||
2201 | assert(session); | |
2202 | ||
2203 | /* Can't enable consumer after session started. */ | |
2204 | if (session->enabled) { | |
f73fabfd | 2205 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2206 | goto error; |
2207 | } | |
2208 | ||
2f77fc4b DG |
2209 | switch (domain) { |
2210 | case 0: | |
2211 | assert(session->consumer); | |
2212 | consumer = session->consumer; | |
2213 | break; | |
2214 | case LTTNG_DOMAIN_KERNEL: | |
2215 | /* Code flow error if we don't have a kernel session here. */ | |
2216 | assert(ksess); | |
2217 | ||
2218 | /* | |
2219 | * Check if we have already sent fds to the consumer. In that case, | |
2220 | * the enable-consumer command can't be used because a start trace | |
2221 | * had previously occured. | |
2222 | */ | |
2223 | if (ksess->consumer_fds_sent) { | |
f73fabfd | 2224 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2225 | goto error; |
2226 | } | |
2227 | ||
2228 | consumer = ksess->tmp_consumer; | |
2229 | if (consumer == NULL) { | |
f73fabfd | 2230 | ret = LTTNG_OK; |
2f77fc4b DG |
2231 | /* No temp. consumer output exists. Using the current one. */ |
2232 | DBG3("No temporary consumer. Using default"); | |
2233 | consumer = ksess->consumer; | |
2234 | goto error; | |
2235 | } | |
2236 | ||
2237 | switch (consumer->type) { | |
2238 | case CONSUMER_DST_LOCAL: | |
2239 | DBG2("Consumer output is local. Creating directory(ies)"); | |
2240 | ||
2241 | /* Create directory(ies) */ | |
2242 | ret = run_as_mkdir_recursive(consumer->dst.trace_path, | |
2243 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2244 | if (ret < 0) { | |
2245 | if (ret != -EEXIST) { | |
2246 | ERR("Trace directory creation error"); | |
f73fabfd | 2247 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2248 | goto error; |
2249 | } | |
2250 | } | |
2251 | break; | |
2252 | case CONSUMER_DST_NET: | |
2253 | DBG2("Consumer output is network. Validating URIs"); | |
2254 | /* Validate if we have both control and data path set. */ | |
2255 | if (!consumer->dst.net.control_isset) { | |
f73fabfd | 2256 | ret = LTTNG_ERR_URL_CTRL_MISS; |
2f77fc4b DG |
2257 | goto error; |
2258 | } | |
2259 | ||
2260 | if (!consumer->dst.net.data_isset) { | |
f73fabfd | 2261 | ret = LTTNG_ERR_URL_DATA_MISS; |
2f77fc4b DG |
2262 | goto error; |
2263 | } | |
2264 | ||
2265 | /* Check established network session state */ | |
2266 | if (session->net_handle == 0) { | |
f73fabfd | 2267 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2268 | ERR("Session network handle is not set on enable-consumer"); |
2269 | goto error; | |
2270 | } | |
2271 | ||
2272 | break; | |
2273 | } | |
2274 | ||
2f77fc4b DG |
2275 | /* |
2276 | * @session-lock | |
2277 | * This is race free for now since the session lock is acquired before | |
2278 | * ending up in this function. No other threads can access this kernel | |
2279 | * session without this lock hence freeing the consumer output object | |
2280 | * is valid. | |
2281 | */ | |
2282 | rcu_read_lock(); | |
9a572cf5 | 2283 | /* Destroy current consumer. We are about to replace it */ |
2f77fc4b DG |
2284 | consumer_destroy_output(ksess->consumer); |
2285 | rcu_read_unlock(); | |
2286 | ksess->consumer = consumer; | |
2287 | ksess->tmp_consumer = NULL; | |
2288 | ||
2289 | break; | |
2290 | case LTTNG_DOMAIN_UST: | |
2291 | /* Code flow error if we don't have a UST session here. */ | |
2292 | assert(usess); | |
2293 | ||
2294 | /* | |
2295 | * Check if we have already sent fds to the consumer. In that case, | |
2296 | * the enable-consumer command can't be used because a start trace | |
2297 | * had previously occured. | |
2298 | */ | |
2299 | if (usess->start_trace) { | |
f73fabfd | 2300 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2301 | goto error; |
2302 | } | |
2303 | ||
2304 | consumer = usess->tmp_consumer; | |
2305 | if (consumer == NULL) { | |
f73fabfd | 2306 | ret = LTTNG_OK; |
2f77fc4b DG |
2307 | /* No temp. consumer output exists. Using the current one. */ |
2308 | DBG3("No temporary consumer. Using default"); | |
2309 | consumer = usess->consumer; | |
2310 | goto error; | |
2311 | } | |
2312 | ||
2313 | switch (consumer->type) { | |
2314 | case CONSUMER_DST_LOCAL: | |
2315 | DBG2("Consumer output is local. Creating directory(ies)"); | |
2316 | ||
2317 | /* Create directory(ies) */ | |
2318 | ret = run_as_mkdir_recursive(consumer->dst.trace_path, | |
2319 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2320 | if (ret < 0) { | |
2321 | if (ret != -EEXIST) { | |
2322 | ERR("Trace directory creation error"); | |
f73fabfd | 2323 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2324 | goto error; |
2325 | } | |
2326 | } | |
2327 | break; | |
2328 | case CONSUMER_DST_NET: | |
2329 | DBG2("Consumer output is network. Validating URIs"); | |
2330 | /* Validate if we have both control and data path set. */ | |
2331 | if (!consumer->dst.net.control_isset) { | |
f73fabfd | 2332 | ret = LTTNG_ERR_URL_CTRL_MISS; |
2f77fc4b DG |
2333 | goto error; |
2334 | } | |
2335 | ||
2336 | if (!consumer->dst.net.data_isset) { | |
f73fabfd | 2337 | ret = LTTNG_ERR_URL_DATA_MISS; |
2f77fc4b DG |
2338 | goto error; |
2339 | } | |
2340 | ||
2341 | /* Check established network session state */ | |
2342 | if (session->net_handle == 0) { | |
f73fabfd | 2343 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2344 | DBG2("Session network handle is not set on enable-consumer"); |
2345 | goto error; | |
2346 | } | |
2347 | ||
2348 | if (consumer->net_seq_index == -1) { | |
f73fabfd | 2349 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2350 | DBG2("Network index is not set on the consumer"); |
2351 | goto error; | |
2352 | } | |
2353 | ||
2354 | break; | |
2355 | } | |
2356 | ||
2f77fc4b DG |
2357 | /* |
2358 | * @session-lock | |
2359 | * This is race free for now since the session lock is acquired before | |
2360 | * ending up in this function. No other threads can access this kernel | |
2361 | * session without this lock hence freeing the consumer output object | |
2362 | * is valid. | |
2363 | */ | |
2364 | rcu_read_lock(); | |
9a572cf5 | 2365 | /* Destroy current consumer. We are about to replace it */ |
2f77fc4b DG |
2366 | consumer_destroy_output(usess->consumer); |
2367 | rcu_read_unlock(); | |
2368 | usess->consumer = consumer; | |
2369 | usess->tmp_consumer = NULL; | |
2370 | ||
2371 | break; | |
2372 | } | |
2373 | ||
4b35a6b3 DG |
2374 | session->start_consumer = 1; |
2375 | ||
2f77fc4b DG |
2376 | /* Enable it */ |
2377 | if (consumer) { | |
2378 | consumer->enabled = 1; | |
2379 | /* Success at this point */ | |
f73fabfd | 2380 | ret = LTTNG_OK; |
2f77fc4b DG |
2381 | } else { |
2382 | /* Should not really happend... */ | |
f73fabfd | 2383 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2384 | } |
2385 | ||
2386 | error: | |
2387 | return ret; | |
2388 | } | |
2389 | ||
806e2684 | 2390 | /* |
6d805429 DG |
2391 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
2392 | * ready for trace analysis (or anykind of reader) or else 1 for pending data. | |
806e2684 | 2393 | */ |
6d805429 | 2394 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2395 | { |
2396 | int ret; | |
2397 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2398 | struct ltt_ust_session *usess = session->ust_session; | |
2399 | ||
2400 | assert(session); | |
2401 | ||
2402 | /* Session MUST be stopped to ask for data availability. */ | |
2403 | if (session->enabled) { | |
2404 | ret = LTTNG_ERR_SESSION_STARTED; | |
2405 | goto error; | |
2406 | } | |
2407 | ||
2408 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2409 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2410 | if (ret == 1) { | |
806e2684 DG |
2411 | /* Data is still being extracted for the kernel. */ |
2412 | goto error; | |
2413 | } | |
2414 | } | |
2415 | ||
2416 | if (usess && usess->consumer) { | |
6d805429 DG |
2417 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2418 | if (ret == 1) { | |
806e2684 DG |
2419 | /* Data is still being extracted for the kernel. */ |
2420 | goto error; | |
2421 | } | |
2422 | } | |
2423 | ||
2424 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2425 | ret = 0; |
806e2684 DG |
2426 | |
2427 | error: | |
2428 | return ret; | |
2429 | } | |
2430 | ||
2f77fc4b DG |
2431 | /* |
2432 | * Init command subsystem. | |
2433 | */ | |
2434 | void cmd_init(void) | |
2435 | { | |
2436 | /* | |
2437 | * Set network sequence index to 1 for streams to match a relayd socket on | |
2438 | * the consumer side. | |
2439 | */ | |
2440 | uatomic_set(&relayd_net_seq_idx, 1); | |
2441 | ||
2442 | DBG("Command subsystem initialized"); | |
2443 | } |