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 | ||
155 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, | |
156 | &iter.iter, uchan, node.node) { | |
157 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
158 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
159 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
160 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
161 | channels[i].attr.switch_timer_interval = | |
162 | uchan->attr.switch_timer_interval; | |
163 | channels[i].attr.read_timer_interval = | |
164 | uchan->attr.read_timer_interval; | |
165 | channels[i].enabled = uchan->enabled; | |
166 | switch (uchan->attr.output) { | |
167 | case LTTNG_UST_MMAP: | |
168 | default: | |
169 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
170 | break; | |
171 | } | |
172 | i++; | |
173 | } | |
174 | break; | |
175 | } | |
176 | default: | |
177 | break; | |
178 | } | |
179 | } | |
180 | ||
181 | /* | |
182 | * Create a list of ust global domain events. | |
183 | */ | |
184 | static int list_lttng_ust_global_events(char *channel_name, | |
185 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
186 | { | |
187 | int i = 0, ret = 0; | |
188 | unsigned int nb_event = 0; | |
189 | struct lttng_ht_iter iter; | |
190 | struct lttng_ht_node_str *node; | |
191 | struct ltt_ust_channel *uchan; | |
192 | struct ltt_ust_event *uevent; | |
193 | struct lttng_event *tmp; | |
194 | ||
195 | DBG("Listing UST global events for channel %s", channel_name); | |
196 | ||
197 | rcu_read_lock(); | |
198 | ||
199 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
200 | node = lttng_ht_iter_get_node_str(&iter); | |
201 | if (node == NULL) { | |
f73fabfd | 202 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
203 | goto error; |
204 | } | |
205 | ||
206 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
207 | ||
208 | nb_event += lttng_ht_get_count(uchan->events); | |
209 | ||
210 | if (nb_event == 0) { | |
211 | ret = nb_event; | |
212 | goto error; | |
213 | } | |
214 | ||
215 | DBG3("Listing UST global %d events", nb_event); | |
216 | ||
217 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
218 | if (tmp == NULL) { | |
f73fabfd | 219 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
220 | goto error; |
221 | } | |
222 | ||
223 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
224 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
225 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
226 | tmp[i].enabled = uevent->enabled; | |
227 | ||
228 | switch (uevent->attr.instrumentation) { | |
229 | case LTTNG_UST_TRACEPOINT: | |
230 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
231 | break; | |
232 | case LTTNG_UST_PROBE: | |
233 | tmp[i].type = LTTNG_EVENT_PROBE; | |
234 | break; | |
235 | case LTTNG_UST_FUNCTION: | |
236 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
237 | break; | |
238 | } | |
239 | ||
240 | tmp[i].loglevel = uevent->attr.loglevel; | |
241 | switch (uevent->attr.loglevel_type) { | |
242 | case LTTNG_UST_LOGLEVEL_ALL: | |
243 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
244 | break; | |
245 | case LTTNG_UST_LOGLEVEL_RANGE: | |
246 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
247 | break; | |
248 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
249 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
250 | break; | |
251 | } | |
252 | if (uevent->filter) { | |
253 | tmp[i].filter = 1; | |
254 | } | |
255 | i++; | |
256 | } | |
257 | ||
258 | ret = nb_event; | |
259 | *events = tmp; | |
260 | ||
261 | error: | |
262 | rcu_read_unlock(); | |
263 | return ret; | |
264 | } | |
265 | ||
266 | /* | |
267 | * Fill lttng_event array of all kernel events in the channel. | |
268 | */ | |
269 | static int list_lttng_kernel_events(char *channel_name, | |
270 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
271 | { | |
272 | int i = 0, ret; | |
273 | unsigned int nb_event; | |
274 | struct ltt_kernel_event *event; | |
275 | struct ltt_kernel_channel *kchan; | |
276 | ||
277 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
278 | if (kchan == NULL) { | |
f73fabfd | 279 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
280 | goto error; |
281 | } | |
282 | ||
283 | nb_event = kchan->event_count; | |
284 | ||
285 | DBG("Listing events for channel %s", kchan->channel->name); | |
286 | ||
287 | if (nb_event == 0) { | |
f73fabfd | 288 | goto end; |
2f77fc4b DG |
289 | } |
290 | ||
291 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
292 | if (*events == NULL) { | |
f73fabfd | 293 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
294 | goto error; |
295 | } | |
296 | ||
297 | /* Kernel channels */ | |
298 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
299 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
300 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
301 | (*events)[i].enabled = event->enabled; | |
302 | ||
303 | switch (event->event->instrumentation) { | |
304 | case LTTNG_KERNEL_TRACEPOINT: | |
305 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
306 | break; | |
307 | case LTTNG_KERNEL_KPROBE: | |
308 | case LTTNG_KERNEL_KRETPROBE: | |
309 | (*events)[i].type = LTTNG_EVENT_PROBE; | |
310 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
311 | sizeof(struct lttng_kernel_kprobe)); | |
312 | break; | |
313 | case LTTNG_KERNEL_FUNCTION: | |
314 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
315 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
316 | sizeof(struct lttng_kernel_function)); | |
317 | break; | |
318 | case LTTNG_KERNEL_NOOP: | |
319 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
320 | break; | |
321 | case LTTNG_KERNEL_SYSCALL: | |
322 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
323 | break; | |
324 | case LTTNG_KERNEL_ALL: | |
325 | assert(0); | |
326 | break; | |
327 | } | |
328 | i++; | |
329 | } | |
330 | ||
f73fabfd | 331 | end: |
2f77fc4b DG |
332 | return nb_event; |
333 | ||
334 | error: | |
f73fabfd DG |
335 | /* Negate the error code to differentiate the size from an error */ |
336 | return -ret; | |
2f77fc4b DG |
337 | } |
338 | ||
339 | /* | |
340 | * Add URI so the consumer output object. Set the correct path depending on the | |
341 | * domain adding the default trace directory. | |
342 | */ | |
343 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
344 | struct lttng_uri *uri, int domain, const char *session_name) | |
345 | { | |
f73fabfd | 346 | int ret = LTTNG_OK; |
2f77fc4b DG |
347 | const char *default_trace_dir; |
348 | ||
349 | assert(uri); | |
350 | ||
351 | if (consumer == NULL) { | |
352 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 353 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
354 | goto error; |
355 | } | |
356 | ||
357 | switch (domain) { | |
358 | case LTTNG_DOMAIN_KERNEL: | |
359 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
360 | break; | |
361 | case LTTNG_DOMAIN_UST: | |
362 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
363 | break; | |
364 | default: | |
365 | /* | |
366 | * This case is possible is we try to add the URI to the global tracing | |
367 | * session consumer object which in this case there is no subdir. | |
368 | */ | |
369 | default_trace_dir = ""; | |
370 | } | |
371 | ||
372 | switch (uri->dtype) { | |
373 | case LTTNG_DST_IPV4: | |
374 | case LTTNG_DST_IPV6: | |
375 | DBG2("Setting network URI to consumer"); | |
376 | ||
377 | /* Set URI into consumer output object */ | |
378 | ret = consumer_set_network_uri(consumer, uri); | |
379 | if (ret < 0) { | |
f73fabfd | 380 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
381 | goto error; |
382 | } else if (ret == 1) { | |
383 | /* | |
384 | * URI was the same in the consumer so we do not append the subdir | |
385 | * again so to not duplicate output dir. | |
386 | */ | |
387 | goto error; | |
388 | } | |
389 | ||
390 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
391 | ret = consumer_set_subdir(consumer, session_name); | |
392 | if (ret < 0) { | |
f73fabfd | 393 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
394 | goto error; |
395 | } | |
396 | } | |
397 | ||
398 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
399 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
400 | strncat(consumer->subdir, default_trace_dir, |
401 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
402 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
403 | } | |
404 | ||
405 | break; | |
406 | case LTTNG_DST_PATH: | |
407 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
408 | memset(consumer->dst.trace_path, 0, | |
409 | sizeof(consumer->dst.trace_path)); | |
410 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
411 | sizeof(consumer->dst.trace_path)); | |
412 | /* Append default trace dir */ | |
413 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
414 | sizeof(consumer->dst.trace_path) - |
415 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
416 | /* Flag consumer as local. */ |
417 | consumer->type = CONSUMER_DST_LOCAL; | |
418 | break; | |
419 | } | |
420 | ||
421 | error: | |
422 | return ret; | |
423 | } | |
424 | ||
425 | /* | |
426 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
427 | */ | |
428 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
429 | { | |
430 | int ret = 0; | |
431 | struct lttng_ht_iter iter; | |
432 | struct consumer_socket *socket; | |
433 | ||
434 | assert(session); | |
435 | ||
436 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { | |
437 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
438 | socket, node.node) { | |
439 | /* Code flow error */ | |
440 | assert(socket->fd >= 0); | |
441 | ||
442 | pthread_mutex_lock(socket->lock); | |
443 | ret = kernel_consumer_send_session(socket->fd, session); | |
444 | pthread_mutex_unlock(socket->lock); | |
445 | if (ret < 0) { | |
f73fabfd | 446 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
447 | goto error; |
448 | } | |
449 | } | |
450 | } | |
451 | ||
452 | error: | |
453 | return ret; | |
454 | } | |
455 | ||
456 | /* | |
457 | * Create a socket to the relayd using the URI. | |
458 | * | |
459 | * On success, the relayd_sock pointer is set to the created socket. | |
460 | * Else, it's stays untouched and a lttcomm error code is returned. | |
461 | */ | |
462 | static int create_connect_relayd(struct consumer_output *output, | |
463 | const char *session_name, struct lttng_uri *uri, | |
464 | struct lttcomm_sock **relayd_sock) | |
465 | { | |
466 | int ret; | |
467 | struct lttcomm_sock *sock; | |
468 | ||
469 | /* Create socket object from URI */ | |
470 | sock = lttcomm_alloc_sock_from_uri(uri); | |
471 | if (sock == NULL) { | |
f73fabfd | 472 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
473 | goto error; |
474 | } | |
475 | ||
476 | ret = lttcomm_create_sock(sock); | |
477 | if (ret < 0) { | |
f73fabfd | 478 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
479 | goto error; |
480 | } | |
481 | ||
482 | /* Connect to relayd so we can proceed with a session creation. */ | |
483 | ret = relayd_connect(sock); | |
484 | if (ret < 0) { | |
485 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 486 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
487 | goto free_sock; |
488 | } | |
489 | ||
490 | /* Create socket for control stream. */ | |
491 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
492 | DBG3("Creating relayd stream socket from URI"); | |
493 | ||
494 | /* Check relayd version */ | |
495 | ret = relayd_version_check(sock, RELAYD_VERSION_COMM_MAJOR, | |
496 | RELAYD_VERSION_COMM_MINOR); | |
497 | if (ret < 0) { | |
f73fabfd | 498 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
499 | goto close_sock; |
500 | } | |
501 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
502 | DBG3("Creating relayd data socket from URI"); | |
503 | } else { | |
504 | /* Command is not valid */ | |
505 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 506 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
507 | goto close_sock; |
508 | } | |
509 | ||
510 | *relayd_sock = sock; | |
511 | ||
f73fabfd | 512 | return LTTNG_OK; |
2f77fc4b DG |
513 | |
514 | close_sock: | |
515 | if (sock) { | |
516 | (void) relayd_close(sock); | |
517 | } | |
518 | free_sock: | |
519 | if (sock) { | |
520 | lttcomm_destroy_sock(sock); | |
521 | } | |
522 | error: | |
523 | return ret; | |
524 | } | |
525 | ||
526 | /* | |
527 | * Connect to the relayd using URI and send the socket to the right consumer. | |
528 | */ | |
529 | static int send_consumer_relayd_socket(int domain, struct ltt_session *session, | |
530 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
531 | int consumer_fd) | |
532 | { | |
533 | int ret; | |
534 | struct lttcomm_sock *sock = NULL; | |
535 | ||
536 | /* Set the network sequence index if not set. */ | |
537 | if (consumer->net_seq_index == -1) { | |
538 | /* | |
539 | * Increment net_seq_idx because we are about to transfer the | |
540 | * new relayd socket to the consumer. | |
541 | */ | |
542 | uatomic_inc(&relayd_net_seq_idx); | |
543 | /* Assign unique key so the consumer can match streams */ | |
544 | uatomic_set(&consumer->net_seq_index, | |
545 | uatomic_read(&relayd_net_seq_idx)); | |
546 | } | |
547 | ||
548 | /* Connect to relayd and make version check if uri is the control. */ | |
549 | ret = create_connect_relayd(consumer, session->name, relayd_uri, &sock); | |
f73fabfd | 550 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
551 | goto close_sock; |
552 | } | |
553 | ||
554 | /* If the control socket is connected, network session is ready */ | |
555 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
556 | session->net_handle = 1; | |
557 | } | |
558 | ||
559 | /* Send relayd socket to consumer. */ | |
560 | ret = consumer_send_relayd_socket(consumer_fd, sock, | |
561 | consumer, relayd_uri->stype); | |
562 | if (ret < 0) { | |
f73fabfd | 563 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
564 | goto close_sock; |
565 | } | |
566 | ||
c890b720 DG |
567 | /* Flag that the corresponding socket was sent. */ |
568 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
569 | consumer->dst.net.control_sock_sent = 1; | |
570 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { | |
571 | consumer->dst.net.data_sock_sent = 1; | |
572 | } | |
573 | ||
f73fabfd | 574 | ret = LTTNG_OK; |
2f77fc4b DG |
575 | |
576 | /* | |
577 | * Close socket which was dup on the consumer side. The session daemon does | |
578 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
579 | */ | |
580 | ||
581 | close_sock: | |
582 | if (sock) { | |
583 | (void) relayd_close(sock); | |
584 | lttcomm_destroy_sock(sock); | |
585 | } | |
586 | ||
587 | return ret; | |
588 | } | |
589 | ||
590 | /* | |
591 | * Send both relayd sockets to a specific consumer and domain. This is a | |
592 | * helper function to facilitate sending the information to the consumer for a | |
593 | * session. | |
594 | */ | |
595 | static int send_consumer_relayd_sockets(int domain, | |
596 | struct ltt_session *session, struct consumer_output *consumer, int fd) | |
597 | { | |
dda67f6c | 598 | int ret = LTTNG_OK; |
2f77fc4b DG |
599 | |
600 | assert(session); | |
601 | assert(consumer); | |
602 | ||
2f77fc4b | 603 | /* Sending control relayd socket. */ |
c890b720 DG |
604 | if (!consumer->dst.net.control_sock_sent) { |
605 | ret = send_consumer_relayd_socket(domain, session, | |
606 | &consumer->dst.net.control, consumer, fd); | |
607 | if (ret != LTTNG_OK) { | |
608 | goto error; | |
609 | } | |
2f77fc4b DG |
610 | } |
611 | ||
612 | /* Sending data relayd socket. */ | |
c890b720 DG |
613 | if (!consumer->dst.net.data_sock_sent) { |
614 | ret = send_consumer_relayd_socket(domain, session, | |
615 | &consumer->dst.net.data, consumer, fd); | |
616 | if (ret != LTTNG_OK) { | |
617 | goto error; | |
618 | } | |
2f77fc4b DG |
619 | } |
620 | ||
2f77fc4b DG |
621 | error: |
622 | return ret; | |
623 | } | |
624 | ||
625 | /* | |
626 | * Setup relayd connections for a tracing session. First creates the socket to | |
627 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
628 | * network. | |
629 | */ | |
630 | static int setup_relayd(struct ltt_session *session) | |
631 | { | |
f73fabfd | 632 | int ret = LTTNG_OK; |
2f77fc4b DG |
633 | struct ltt_ust_session *usess; |
634 | struct ltt_kernel_session *ksess; | |
635 | struct consumer_socket *socket; | |
636 | struct lttng_ht_iter iter; | |
637 | ||
638 | assert(session); | |
639 | ||
640 | usess = session->ust_session; | |
641 | ksess = session->kernel_session; | |
642 | ||
643 | DBG2("Setting relayd for session %s", session->name); | |
644 | ||
645 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET | |
646 | && usess->consumer->enabled) { | |
647 | /* For each consumer socket, send relayd sockets */ | |
648 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
649 | socket, node.node) { | |
650 | /* Code flow error */ | |
651 | assert(socket->fd >= 0); | |
652 | ||
653 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 654 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session, |
2f77fc4b DG |
655 | usess->consumer, socket->fd); |
656 | pthread_mutex_unlock(socket->lock); | |
f73fabfd | 657 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
658 | goto error; |
659 | } | |
660 | } | |
661 | } | |
662 | ||
663 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
664 | && ksess->consumer->enabled) { | |
665 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
666 | socket, node.node) { | |
667 | /* Code flow error */ | |
668 | assert(socket->fd >= 0); | |
669 | ||
670 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 671 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session, |
2f77fc4b DG |
672 | ksess->consumer, socket->fd); |
673 | pthread_mutex_unlock(socket->lock); | |
f73fabfd | 674 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
675 | goto error; |
676 | } | |
677 | } | |
678 | } | |
679 | ||
680 | error: | |
681 | return ret; | |
682 | } | |
683 | ||
9b6c7ec5 DG |
684 | /* |
685 | * Start a kernel session by opening all necessary streams. | |
686 | */ | |
687 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
688 | { | |
689 | int ret; | |
690 | struct ltt_kernel_channel *kchan; | |
691 | ||
692 | /* Open kernel metadata */ | |
693 | if (ksess->metadata == NULL) { | |
694 | ret = kernel_open_metadata(ksess); | |
695 | if (ret < 0) { | |
696 | ret = LTTNG_ERR_KERN_META_FAIL; | |
697 | goto error; | |
698 | } | |
699 | } | |
700 | ||
701 | /* Open kernel metadata stream */ | |
702 | if (ksess->metadata_stream_fd < 0) { | |
703 | ret = kernel_open_metadata_stream(ksess); | |
704 | if (ret < 0) { | |
705 | ERR("Kernel create metadata stream failed"); | |
706 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
707 | goto error; | |
708 | } | |
709 | } | |
710 | ||
711 | /* For each channel */ | |
712 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
713 | if (kchan->stream_count == 0) { | |
714 | ret = kernel_open_channel_stream(kchan); | |
715 | if (ret < 0) { | |
716 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
717 | goto error; | |
718 | } | |
719 | /* Update the stream global counter */ | |
720 | ksess->stream_count_global += ret; | |
721 | } | |
722 | } | |
723 | ||
724 | /* Setup kernel consumer socket and send fds to it */ | |
725 | ret = init_kernel_tracing(ksess); | |
726 | if (ret < 0) { | |
727 | ret = LTTNG_ERR_KERN_START_FAIL; | |
728 | goto error; | |
729 | } | |
730 | ||
731 | /* This start the kernel tracing */ | |
732 | ret = kernel_start_session(ksess); | |
733 | if (ret < 0) { | |
734 | ret = LTTNG_ERR_KERN_START_FAIL; | |
735 | goto error; | |
736 | } | |
737 | ||
738 | /* Quiescent wait after starting trace */ | |
784303b0 | 739 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
740 | |
741 | ksess->started = 1; | |
742 | ||
743 | ret = LTTNG_OK; | |
744 | ||
745 | error: | |
746 | return ret; | |
747 | } | |
748 | ||
2f77fc4b DG |
749 | /* |
750 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
751 | */ | |
752 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
753 | char *channel_name) | |
754 | { | |
755 | int ret; | |
756 | struct ltt_ust_session *usess; | |
757 | ||
758 | usess = session->ust_session; | |
759 | ||
760 | switch (domain) { | |
761 | case LTTNG_DOMAIN_KERNEL: | |
762 | { | |
763 | ret = channel_kernel_disable(session->kernel_session, | |
764 | channel_name); | |
f73fabfd | 765 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
766 | goto error; |
767 | } | |
768 | ||
769 | kernel_wait_quiescent(kernel_tracer_fd); | |
770 | break; | |
771 | } | |
772 | case LTTNG_DOMAIN_UST: | |
773 | { | |
774 | struct ltt_ust_channel *uchan; | |
775 | struct lttng_ht *chan_ht; | |
776 | ||
777 | chan_ht = usess->domain_global.channels; | |
778 | ||
779 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
780 | if (uchan == NULL) { | |
f73fabfd | 781 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
782 | goto error; |
783 | } | |
784 | ||
785 | ret = channel_ust_disable(usess, domain, uchan); | |
f73fabfd | 786 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
787 | goto error; |
788 | } | |
789 | break; | |
790 | } | |
791 | #if 0 | |
792 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
793 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
794 | case LTTNG_DOMAIN_UST_PID: | |
795 | #endif | |
796 | default: | |
f73fabfd | 797 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
798 | goto error; |
799 | } | |
800 | ||
f73fabfd | 801 | ret = LTTNG_OK; |
2f77fc4b DG |
802 | |
803 | error: | |
804 | return ret; | |
805 | } | |
806 | ||
807 | /* | |
808 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
809 | * | |
810 | * The wpipe arguments is used as a notifier for the kernel thread. | |
811 | */ | |
812 | int cmd_enable_channel(struct ltt_session *session, | |
813 | int domain, struct lttng_channel *attr, int wpipe) | |
814 | { | |
815 | int ret; | |
816 | struct ltt_ust_session *usess = session->ust_session; | |
817 | struct lttng_ht *chan_ht; | |
818 | ||
819 | assert(session); | |
820 | assert(attr); | |
821 | ||
822 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
823 | ||
824 | switch (domain) { | |
825 | case LTTNG_DOMAIN_KERNEL: | |
826 | { | |
827 | struct ltt_kernel_channel *kchan; | |
828 | ||
2f77fc4b DG |
829 | kchan = trace_kernel_get_channel_by_name(attr->name, |
830 | session->kernel_session); | |
831 | if (kchan == NULL) { | |
832 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
833 | } else { | |
834 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
835 | } | |
836 | ||
f73fabfd | 837 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
838 | goto error; |
839 | } | |
840 | ||
784303b0 | 841 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
842 | |
843 | /* | |
844 | * If the session was previously started, start as well this newly | |
845 | * created kernel session so the events/channels enabled *after* the | |
846 | * start actually work. | |
847 | */ | |
848 | if (session->started && !session->kernel_session->started) { | |
849 | ret = start_kernel_session(session->kernel_session, wpipe); | |
850 | if (ret != LTTNG_OK) { | |
851 | goto error; | |
852 | } | |
853 | } | |
2f77fc4b DG |
854 | break; |
855 | } | |
856 | case LTTNG_DOMAIN_UST: | |
857 | { | |
858 | struct ltt_ust_channel *uchan; | |
859 | ||
860 | chan_ht = usess->domain_global.channels; | |
861 | ||
862 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
863 | if (uchan == NULL) { | |
864 | ret = channel_ust_create(usess, domain, attr); | |
865 | } else { | |
866 | ret = channel_ust_enable(usess, domain, uchan); | |
867 | } | |
9b6c7ec5 DG |
868 | |
869 | /* Start the UST session if the session was already started. */ | |
870 | if (session->started && !usess->start_trace) { | |
871 | ret = ust_app_start_trace_all(usess); | |
872 | if (ret < 0) { | |
873 | ret = LTTNG_ERR_UST_START_FAIL; | |
874 | goto error; | |
875 | } | |
876 | ret = LTTNG_OK; | |
877 | usess->start_trace = 1; | |
878 | } | |
2f77fc4b DG |
879 | break; |
880 | } | |
881 | #if 0 | |
882 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
883 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
884 | case LTTNG_DOMAIN_UST_PID: | |
885 | #endif | |
886 | default: | |
f73fabfd | 887 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
888 | goto error; |
889 | } | |
890 | ||
891 | error: | |
892 | return ret; | |
893 | } | |
894 | ||
895 | ||
896 | /* | |
897 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
898 | */ | |
899 | int cmd_disable_event(struct ltt_session *session, int domain, | |
900 | char *channel_name, char *event_name) | |
901 | { | |
902 | int ret; | |
903 | ||
904 | switch (domain) { | |
905 | case LTTNG_DOMAIN_KERNEL: | |
906 | { | |
907 | struct ltt_kernel_channel *kchan; | |
908 | struct ltt_kernel_session *ksess; | |
909 | ||
910 | ksess = session->kernel_session; | |
911 | ||
912 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
913 | if (kchan == NULL) { | |
f73fabfd | 914 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
915 | goto error; |
916 | } | |
917 | ||
918 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); | |
f73fabfd | 919 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
920 | goto error; |
921 | } | |
922 | ||
923 | kernel_wait_quiescent(kernel_tracer_fd); | |
924 | break; | |
925 | } | |
926 | case LTTNG_DOMAIN_UST: | |
927 | { | |
928 | struct ltt_ust_channel *uchan; | |
929 | struct ltt_ust_session *usess; | |
930 | ||
931 | usess = session->ust_session; | |
932 | ||
933 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
934 | channel_name); | |
935 | if (uchan == NULL) { | |
f73fabfd | 936 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
937 | goto error; |
938 | } | |
939 | ||
940 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); | |
f73fabfd | 941 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
942 | goto error; |
943 | } | |
944 | ||
945 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
946 | channel_name); | |
947 | break; | |
948 | } | |
949 | #if 0 | |
950 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
951 | case LTTNG_DOMAIN_UST_PID: | |
952 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
953 | #endif | |
954 | default: | |
f73fabfd | 955 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
956 | goto error; |
957 | } | |
958 | ||
f73fabfd | 959 | ret = LTTNG_OK; |
2f77fc4b DG |
960 | |
961 | error: | |
962 | return ret; | |
963 | } | |
964 | ||
965 | /* | |
966 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
967 | */ | |
968 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
969 | char *channel_name) | |
970 | { | |
971 | int ret; | |
972 | ||
973 | switch (domain) { | |
974 | case LTTNG_DOMAIN_KERNEL: | |
975 | { | |
976 | struct ltt_kernel_session *ksess; | |
977 | struct ltt_kernel_channel *kchan; | |
978 | ||
979 | ksess = session->kernel_session; | |
980 | ||
981 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
982 | if (kchan == NULL) { | |
f73fabfd | 983 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
984 | goto error; |
985 | } | |
986 | ||
987 | ret = event_kernel_disable_all(ksess, kchan); | |
f73fabfd | 988 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
989 | goto error; |
990 | } | |
991 | ||
992 | kernel_wait_quiescent(kernel_tracer_fd); | |
993 | break; | |
994 | } | |
995 | case LTTNG_DOMAIN_UST: | |
996 | { | |
997 | struct ltt_ust_session *usess; | |
998 | struct ltt_ust_channel *uchan; | |
999 | ||
1000 | usess = session->ust_session; | |
1001 | ||
1002 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1003 | channel_name); | |
1004 | if (uchan == NULL) { | |
f73fabfd | 1005 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1006 | goto error; |
1007 | } | |
1008 | ||
1009 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); | |
1010 | if (ret != 0) { | |
1011 | goto error; | |
1012 | } | |
1013 | ||
1014 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1015 | ||
1016 | break; | |
1017 | } | |
1018 | #if 0 | |
1019 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1020 | case LTTNG_DOMAIN_UST_PID: | |
1021 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1022 | #endif | |
1023 | default: | |
f73fabfd | 1024 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1025 | goto error; |
1026 | } | |
1027 | ||
f73fabfd | 1028 | ret = LTTNG_OK; |
2f77fc4b DG |
1029 | |
1030 | error: | |
1031 | return ret; | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1036 | */ | |
1037 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1038 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b DG |
1039 | { |
1040 | int ret; | |
1041 | ||
1042 | switch (domain) { | |
1043 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1044 | assert(session->kernel_session); |
1045 | ||
1046 | if (session->kernel_session->channel_count == 0) { | |
1047 | /* Create default channel */ | |
1048 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1049 | if (ret != LTTNG_OK) { | |
1050 | goto error; | |
1051 | } | |
1052 | } | |
1053 | ||
2f77fc4b | 1054 | /* Add kernel context to kernel tracer */ |
601d5acf | 1055 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1056 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1057 | goto error; |
1058 | } | |
1059 | break; | |
1060 | case LTTNG_DOMAIN_UST: | |
1061 | { | |
1062 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
1063 | assert(usess); |
1064 | ||
979e618e DG |
1065 | unsigned int chan_count = |
1066 | lttng_ht_get_count(usess->domain_global.channels); | |
1067 | if (chan_count == 0) { | |
1068 | struct lttng_channel *attr; | |
1069 | /* Create default channel */ | |
1070 | attr = channel_new_default_attr(domain); | |
1071 | if (attr == NULL) { | |
1072 | ret = LTTNG_ERR_FATAL; | |
1073 | goto error; | |
1074 | } | |
1075 | ||
1076 | ret = channel_ust_create(usess, domain, attr); | |
1077 | if (ret != LTTNG_OK) { | |
1078 | free(attr); | |
1079 | goto error; | |
1080 | } | |
1081 | free(attr); | |
1082 | } | |
1083 | ||
601d5acf | 1084 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1085 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1086 | goto error; |
1087 | } | |
1088 | break; | |
1089 | } | |
1090 | #if 0 | |
1091 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1092 | case LTTNG_DOMAIN_UST_PID: | |
1093 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1094 | #endif | |
1095 | default: | |
f73fabfd | 1096 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1097 | goto error; |
1098 | } | |
1099 | ||
f73fabfd | 1100 | ret = LTTNG_OK; |
2f77fc4b DG |
1101 | |
1102 | error: | |
1103 | return ret; | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * Command LTTNG_SET_FILTER processed by the client thread. | |
1108 | */ | |
1109 | int cmd_set_filter(struct ltt_session *session, int domain, | |
178191b3 | 1110 | char *channel_name, struct lttng_event *event, |
2f77fc4b DG |
1111 | struct lttng_filter_bytecode *bytecode) |
1112 | { | |
1113 | int ret; | |
1114 | ||
1115 | switch (domain) { | |
1116 | case LTTNG_DOMAIN_KERNEL: | |
f73fabfd | 1117 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1118 | break; |
1119 | case LTTNG_DOMAIN_UST: | |
1120 | { | |
1121 | struct ltt_ust_session *usess = session->ust_session; | |
1122 | ||
178191b3 | 1123 | ret = filter_ust_set(usess, domain, bytecode, event, channel_name); |
f73fabfd | 1124 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1125 | goto error; |
1126 | } | |
1127 | break; | |
1128 | } | |
1129 | #if 0 | |
1130 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1131 | case LTTNG_DOMAIN_UST_PID: | |
1132 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1133 | #endif | |
1134 | default: | |
f73fabfd | 1135 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1136 | goto error; |
1137 | } | |
1138 | ||
f73fabfd | 1139 | ret = LTTNG_OK; |
2f77fc4b DG |
1140 | |
1141 | error: | |
1142 | return ret; | |
1143 | ||
1144 | } | |
1145 | ||
1146 | ||
1147 | /* | |
1148 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1149 | */ | |
1150 | int cmd_enable_event(struct ltt_session *session, int domain, | |
1151 | char *channel_name, struct lttng_event *event, int wpipe) | |
1152 | { | |
1153 | int ret; | |
1154 | struct lttng_channel *attr; | |
1155 | ||
1156 | assert(session); | |
1157 | assert(event); | |
1158 | assert(channel_name); | |
1159 | ||
1160 | switch (domain) { | |
1161 | case LTTNG_DOMAIN_KERNEL: | |
1162 | { | |
1163 | struct ltt_kernel_channel *kchan; | |
1164 | ||
1165 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1166 | session->kernel_session); | |
1167 | if (kchan == NULL) { | |
1168 | attr = channel_new_default_attr(domain); | |
1169 | if (attr == NULL) { | |
f73fabfd | 1170 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1171 | goto error; |
1172 | } | |
1173 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1174 | ||
1175 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1176 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1177 | free(attr); |
1178 | goto error; | |
1179 | } | |
1180 | free(attr); | |
1181 | } | |
1182 | ||
1183 | /* Get the newly created kernel channel pointer */ | |
1184 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1185 | session->kernel_session); | |
1186 | if (kchan == NULL) { | |
1187 | /* This sould not happen... */ | |
f73fabfd | 1188 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1189 | goto error; |
1190 | } | |
1191 | ||
1192 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, | |
1193 | event); | |
f73fabfd | 1194 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1195 | goto error; |
1196 | } | |
1197 | ||
1198 | kernel_wait_quiescent(kernel_tracer_fd); | |
1199 | break; | |
1200 | } | |
1201 | case LTTNG_DOMAIN_UST: | |
1202 | { | |
1203 | struct ltt_ust_channel *uchan; | |
1204 | struct ltt_ust_session *usess = session->ust_session; | |
1205 | ||
1206 | assert(usess); | |
1207 | ||
1208 | /* Get channel from global UST domain */ | |
1209 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1210 | channel_name); | |
1211 | if (uchan == NULL) { | |
1212 | /* Create default channel */ | |
1213 | attr = channel_new_default_attr(domain); | |
1214 | if (attr == NULL) { | |
f73fabfd | 1215 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1216 | goto error; |
1217 | } | |
1218 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1219 | ||
1220 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1221 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1222 | free(attr); |
1223 | goto error; | |
1224 | } | |
1225 | free(attr); | |
1226 | ||
1227 | /* Get the newly created channel reference back */ | |
1228 | uchan = trace_ust_find_channel_by_name( | |
1229 | usess->domain_global.channels, channel_name); | |
1230 | assert(uchan); | |
1231 | } | |
1232 | ||
1233 | /* At this point, the session and channel exist on the tracer */ | |
1234 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); | |
f73fabfd | 1235 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1236 | goto error; |
1237 | } | |
1238 | break; | |
1239 | } | |
1240 | #if 0 | |
1241 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1242 | case LTTNG_DOMAIN_UST_PID: | |
1243 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1244 | #endif | |
1245 | default: | |
f73fabfd | 1246 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1247 | goto error; |
1248 | } | |
1249 | ||
f73fabfd | 1250 | ret = LTTNG_OK; |
2f77fc4b DG |
1251 | |
1252 | error: | |
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1258 | */ | |
1259 | int cmd_enable_event_all(struct ltt_session *session, int domain, | |
1260 | char *channel_name, int event_type, int wpipe) | |
1261 | { | |
1262 | int ret; | |
1263 | struct lttng_channel *attr; | |
1264 | ||
1265 | assert(session); | |
1266 | assert(channel_name); | |
1267 | ||
1268 | switch (domain) { | |
1269 | case LTTNG_DOMAIN_KERNEL: | |
1270 | { | |
1271 | struct ltt_kernel_channel *kchan; | |
1272 | ||
1273 | assert(session->kernel_session); | |
1274 | ||
1275 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1276 | session->kernel_session); | |
1277 | if (kchan == NULL) { | |
1278 | /* Create default channel */ | |
1279 | attr = channel_new_default_attr(domain); | |
1280 | if (attr == NULL) { | |
f73fabfd | 1281 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1282 | goto error; |
1283 | } | |
1284 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1285 | ||
1286 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1287 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1288 | free(attr); |
1289 | goto error; | |
1290 | } | |
1291 | free(attr); | |
1292 | ||
1293 | /* Get the newly created kernel channel pointer */ | |
1294 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1295 | session->kernel_session); | |
1296 | assert(kchan); | |
1297 | } | |
1298 | ||
1299 | switch (event_type) { | |
1300 | case LTTNG_EVENT_SYSCALL: | |
1301 | ret = event_kernel_enable_all_syscalls(session->kernel_session, | |
1302 | kchan, kernel_tracer_fd); | |
1303 | break; | |
1304 | case LTTNG_EVENT_TRACEPOINT: | |
1305 | /* | |
1306 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1307 | * events already registered to the channel. | |
1308 | */ | |
1309 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, | |
1310 | kchan, kernel_tracer_fd); | |
1311 | break; | |
1312 | case LTTNG_EVENT_ALL: | |
1313 | /* Enable syscalls and tracepoints */ | |
1314 | ret = event_kernel_enable_all(session->kernel_session, | |
1315 | kchan, kernel_tracer_fd); | |
1316 | break; | |
1317 | default: | |
f73fabfd | 1318 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1319 | goto error; |
1320 | } | |
1321 | ||
1322 | /* Manage return value */ | |
f73fabfd | 1323 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1324 | goto error; |
1325 | } | |
1326 | ||
1327 | kernel_wait_quiescent(kernel_tracer_fd); | |
1328 | break; | |
1329 | } | |
1330 | case LTTNG_DOMAIN_UST: | |
1331 | { | |
1332 | struct ltt_ust_channel *uchan; | |
1333 | struct ltt_ust_session *usess = session->ust_session; | |
1334 | ||
1335 | assert(usess); | |
1336 | ||
1337 | /* Get channel from global UST domain */ | |
1338 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1339 | channel_name); | |
1340 | if (uchan == NULL) { | |
1341 | /* Create default channel */ | |
1342 | attr = channel_new_default_attr(domain); | |
1343 | if (attr == NULL) { | |
f73fabfd | 1344 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1345 | goto error; |
1346 | } | |
1347 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1348 | ||
1349 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1350 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1351 | free(attr); |
1352 | goto error; | |
1353 | } | |
1354 | free(attr); | |
1355 | ||
1356 | /* Get the newly created channel reference back */ | |
1357 | uchan = trace_ust_find_channel_by_name( | |
1358 | usess->domain_global.channels, channel_name); | |
1359 | assert(uchan); | |
1360 | } | |
1361 | ||
1362 | /* At this point, the session and channel exist on the tracer */ | |
1363 | ||
1364 | switch (event_type) { | |
1365 | case LTTNG_EVENT_ALL: | |
1366 | case LTTNG_EVENT_TRACEPOINT: | |
1367 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
f73fabfd | 1368 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1369 | goto error; |
1370 | } | |
1371 | break; | |
1372 | default: | |
f73fabfd | 1373 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1374 | goto error; |
1375 | } | |
1376 | ||
1377 | /* Manage return value */ | |
f73fabfd | 1378 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1379 | goto error; |
1380 | } | |
1381 | ||
1382 | break; | |
1383 | } | |
1384 | #if 0 | |
1385 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1386 | case LTTNG_DOMAIN_UST_PID: | |
1387 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1388 | #endif | |
1389 | default: | |
f73fabfd | 1390 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1391 | goto error; |
1392 | } | |
1393 | ||
f73fabfd | 1394 | ret = LTTNG_OK; |
2f77fc4b DG |
1395 | |
1396 | error: | |
1397 | return ret; | |
1398 | } | |
1399 | ||
1400 | ||
1401 | /* | |
1402 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1403 | */ | |
1404 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1405 | { | |
1406 | int ret; | |
1407 | ssize_t nb_events = 0; | |
1408 | ||
1409 | switch (domain) { | |
1410 | case LTTNG_DOMAIN_KERNEL: | |
1411 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1412 | if (nb_events < 0) { | |
f73fabfd | 1413 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1414 | goto error; |
1415 | } | |
1416 | break; | |
1417 | case LTTNG_DOMAIN_UST: | |
1418 | nb_events = ust_app_list_events(events); | |
1419 | if (nb_events < 0) { | |
f73fabfd | 1420 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1421 | goto error; |
1422 | } | |
1423 | break; | |
1424 | default: | |
f73fabfd | 1425 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1426 | goto error; |
1427 | } | |
1428 | ||
1429 | return nb_events; | |
1430 | ||
1431 | error: | |
1432 | /* Return negative value to differentiate return code */ | |
1433 | return -ret; | |
1434 | } | |
1435 | ||
1436 | /* | |
1437 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1438 | */ | |
1439 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1440 | struct lttng_event_field **fields) | |
1441 | { | |
1442 | int ret; | |
1443 | ssize_t nb_fields = 0; | |
1444 | ||
1445 | switch (domain) { | |
1446 | case LTTNG_DOMAIN_UST: | |
1447 | nb_fields = ust_app_list_event_fields(fields); | |
1448 | if (nb_fields < 0) { | |
f73fabfd | 1449 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1450 | goto error; |
1451 | } | |
1452 | break; | |
1453 | case LTTNG_DOMAIN_KERNEL: | |
1454 | default: /* fall-through */ | |
f73fabfd | 1455 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1456 | goto error; |
1457 | } | |
1458 | ||
1459 | return nb_fields; | |
1460 | ||
1461 | error: | |
1462 | /* Return negative value to differentiate return code */ | |
1463 | return -ret; | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * Command LTTNG_START_TRACE processed by the client thread. | |
1468 | */ | |
1469 | int cmd_start_trace(struct ltt_session *session) | |
1470 | { | |
1471 | int ret; | |
1472 | struct ltt_kernel_session *ksession; | |
1473 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1474 | |
1475 | assert(session); | |
1476 | ||
1477 | /* Ease our life a bit ;) */ | |
1478 | ksession = session->kernel_session; | |
1479 | usess = session->ust_session; | |
1480 | ||
1481 | if (session->enabled) { | |
1482 | /* Already started. */ | |
f73fabfd | 1483 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1484 | goto error; |
1485 | } | |
1486 | ||
1487 | session->enabled = 1; | |
1488 | ||
1489 | ret = setup_relayd(session); | |
f73fabfd | 1490 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1491 | ERR("Error setting up relayd for session %s", session->name); |
1492 | goto error; | |
1493 | } | |
1494 | ||
1495 | /* Kernel tracing */ | |
1496 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1497 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1498 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1499 | goto error; |
1500 | } | |
2f77fc4b DG |
1501 | } |
1502 | ||
1503 | /* Flag session that trace should start automatically */ | |
1504 | if (usess) { | |
1505 | usess->start_trace = 1; | |
1506 | ||
1507 | ret = ust_app_start_trace_all(usess); | |
1508 | if (ret < 0) { | |
f73fabfd | 1509 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1510 | goto error; |
1511 | } | |
1512 | } | |
1513 | ||
9b6c7ec5 DG |
1514 | session->started = 1; |
1515 | ||
f73fabfd | 1516 | ret = LTTNG_OK; |
2f77fc4b DG |
1517 | |
1518 | error: | |
1519 | return ret; | |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1524 | */ | |
1525 | int cmd_stop_trace(struct ltt_session *session) | |
1526 | { | |
1527 | int ret; | |
1528 | struct ltt_kernel_channel *kchan; | |
1529 | struct ltt_kernel_session *ksession; | |
1530 | struct ltt_ust_session *usess; | |
1531 | ||
1532 | assert(session); | |
1533 | ||
1534 | /* Short cut */ | |
1535 | ksession = session->kernel_session; | |
1536 | usess = session->ust_session; | |
1537 | ||
1538 | if (!session->enabled) { | |
f73fabfd | 1539 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1540 | goto error; |
1541 | } | |
1542 | ||
1543 | session->enabled = 0; | |
1544 | ||
1545 | /* Kernel tracer */ | |
1546 | if (ksession) { | |
1547 | DBG("Stop kernel tracing"); | |
1548 | ||
1549 | /* Flush metadata if exist */ | |
1550 | if (ksession->metadata_stream_fd >= 0) { | |
1551 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1552 | if (ret < 0) { | |
1553 | ERR("Kernel metadata flush failed"); | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | /* Flush all buffers before stopping */ | |
1558 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1559 | ret = kernel_flush_buffer(kchan); | |
1560 | if (ret < 0) { | |
1561 | ERR("Kernel flush buffer error"); | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | ret = kernel_stop_session(ksession); | |
1566 | if (ret < 0) { | |
f73fabfd | 1567 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1568 | goto error; |
1569 | } | |
1570 | ||
1571 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 DG |
1572 | |
1573 | ksession->started = 0; | |
2f77fc4b DG |
1574 | } |
1575 | ||
1576 | if (usess) { | |
1577 | usess->start_trace = 0; | |
1578 | ||
1579 | ret = ust_app_stop_trace_all(usess); | |
1580 | if (ret < 0) { | |
f73fabfd | 1581 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1582 | goto error; |
1583 | } | |
1584 | } | |
1585 | ||
9b6c7ec5 DG |
1586 | session->started = 0; |
1587 | ||
f73fabfd | 1588 | ret = LTTNG_OK; |
2f77fc4b DG |
1589 | |
1590 | error: | |
1591 | return ret; | |
1592 | } | |
1593 | ||
1594 | /* | |
1595 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1596 | */ | |
1597 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1598 | size_t nb_uri, struct lttng_uri *uris) | |
1599 | { | |
1600 | int ret, i; | |
1601 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1602 | struct ltt_ust_session *usess = session->ust_session; | |
1603 | struct consumer_output *consumer = NULL; | |
1604 | ||
1605 | assert(session); | |
1606 | assert(uris); | |
1607 | assert(nb_uri > 0); | |
1608 | ||
1609 | /* Can't enable consumer after session started. */ | |
1610 | if (session->enabled) { | |
f73fabfd | 1611 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1612 | goto error; |
1613 | } | |
1614 | ||
2f77fc4b DG |
1615 | /* |
1616 | * This case switch makes sure the domain session has a temporary consumer | |
1617 | * so the URL can be set. | |
1618 | */ | |
1619 | switch (domain) { | |
1620 | case 0: | |
1621 | /* Code flow error. A session MUST always have a consumer object */ | |
1622 | assert(session->consumer); | |
1623 | /* | |
1624 | * The URL will be added to the tracing session consumer instead of a | |
1625 | * specific domain consumer. | |
1626 | */ | |
1627 | consumer = session->consumer; | |
1628 | break; | |
1629 | case LTTNG_DOMAIN_KERNEL: | |
1630 | /* Code flow error if we don't have a kernel session here. */ | |
1631 | assert(ksess); | |
1632 | ||
1633 | /* Create consumer output if none exists */ | |
1634 | consumer = ksess->tmp_consumer; | |
1635 | if (consumer == NULL) { | |
1636 | consumer = consumer_copy_output(ksess->consumer); | |
1637 | if (consumer == NULL) { | |
f73fabfd | 1638 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1639 | goto error; |
1640 | } | |
1641 | /* Trash the consumer subdir, we are about to set a new one. */ | |
1642 | memset(consumer->subdir, 0, sizeof(consumer->subdir)); | |
1643 | ksess->tmp_consumer = consumer; | |
1644 | } | |
1645 | ||
1646 | break; | |
1647 | case LTTNG_DOMAIN_UST: | |
1648 | /* Code flow error if we don't have a kernel session here. */ | |
1649 | assert(usess); | |
1650 | ||
1651 | /* Create consumer output if none exists */ | |
1652 | consumer = usess->tmp_consumer; | |
1653 | if (consumer == NULL) { | |
1654 | consumer = consumer_copy_output(usess->consumer); | |
1655 | if (consumer == NULL) { | |
f73fabfd | 1656 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1657 | goto error; |
1658 | } | |
1659 | /* Trash the consumer subdir, we are about to set a new one. */ | |
1660 | memset(consumer->subdir, 0, sizeof(consumer->subdir)); | |
1661 | usess->tmp_consumer = consumer; | |
1662 | } | |
1663 | ||
1664 | break; | |
1665 | } | |
1666 | ||
1667 | for (i = 0; i < nb_uri; i++) { | |
1668 | struct consumer_socket *socket; | |
1669 | struct lttng_ht_iter iter; | |
1670 | ||
1671 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); | |
1672 | if (ret < 0) { | |
1673 | goto error; | |
1674 | } | |
1675 | ||
1676 | /* | |
1677 | * Don't send relayd socket if URI is NOT remote or if the relayd | |
c890b720 | 1678 | * socket for the session was already sent. |
2f77fc4b DG |
1679 | */ |
1680 | if (uris[i].dtype == LTTNG_DST_PATH || | |
c890b720 DG |
1681 | (uris[i].stype == LTTNG_STREAM_CONTROL && |
1682 | consumer->dst.net.control_sock_sent) || | |
1683 | (uris[i].stype == LTTNG_STREAM_DATA && | |
1684 | consumer->dst.net.data_sock_sent)) { | |
2f77fc4b DG |
1685 | continue; |
1686 | } | |
1687 | ||
1688 | /* Try to send relayd URI to the consumer if exist. */ | |
1689 | rcu_read_lock(); | |
1690 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, | |
1691 | socket, node.node) { | |
1692 | ||
1693 | /* A socket in the HT should never have a negative fd */ | |
1694 | assert(socket->fd >= 0); | |
1695 | ||
1696 | pthread_mutex_lock(socket->lock); | |
1697 | ret = send_consumer_relayd_socket(domain, session, &uris[i], | |
1698 | consumer, socket->fd); | |
1699 | pthread_mutex_unlock(socket->lock); | |
f73fabfd | 1700 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1701 | rcu_read_unlock(); |
1702 | goto error; | |
1703 | } | |
1704 | } | |
1705 | rcu_read_unlock(); | |
1706 | } | |
1707 | ||
1708 | /* All good! */ | |
f73fabfd | 1709 | ret = LTTNG_OK; |
2f77fc4b DG |
1710 | |
1711 | error: | |
1712 | return ret; | |
1713 | } | |
1714 | ||
1715 | /* | |
1716 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1717 | */ | |
1718 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
1719 | size_t nb_uri, lttng_sock_cred *creds) | |
1720 | { | |
1721 | int ret; | |
1722 | char *path = NULL; | |
1723 | struct ltt_session *session; | |
1724 | ||
1725 | assert(name); | |
1726 | ||
1727 | /* | |
1728 | * Verify if the session already exist | |
1729 | * | |
1730 | * XXX: There is no need for the session lock list here since the caller | |
1731 | * (process_client_msg) is holding it. We might want to change that so a | |
1732 | * single command does not lock the entire session list. | |
1733 | */ | |
1734 | session = session_find_by_name(name); | |
1735 | if (session != NULL) { | |
f73fabfd | 1736 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1737 | goto find_error; |
1738 | } | |
1739 | ||
1740 | /* Create tracing session in the registry */ | |
1741 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), | |
1742 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
f73fabfd | 1743 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1744 | goto session_error; |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | * Get the newly created session pointer back | |
1749 | * | |
1750 | * XXX: There is no need for the session lock list here since the caller | |
1751 | * (process_client_msg) is holding it. We might want to change that so a | |
1752 | * single command does not lock the entire session list. | |
1753 | */ | |
1754 | session = session_find_by_name(name); | |
1755 | assert(session); | |
1756 | ||
1757 | /* Create default consumer output for the session not yet created. */ | |
1758 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1759 | if (session->consumer == NULL) { | |
f73fabfd | 1760 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1761 | goto consumer_error; |
1762 | } | |
1763 | ||
1764 | /* | |
1765 | * This means that the lttng_create_session call was called with the _path_ | |
1766 | * argument set to NULL. | |
1767 | */ | |
1768 | if (uris == NULL) { | |
1769 | /* | |
1770 | * At this point, we'll skip the consumer URI setup and create a | |
1771 | * session with a NULL path which will flag the session to NOT spawn a | |
1772 | * consumer. | |
1773 | */ | |
1774 | DBG("Create session %s with NO uri, skipping consumer setup", name); | |
1775 | goto end; | |
1776 | } | |
1777 | ||
1778 | session->start_consumer = 1; | |
1779 | ||
1780 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
f73fabfd | 1781 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1782 | goto consumer_error; |
1783 | } | |
1784 | ||
1785 | session->consumer->enabled = 1; | |
1786 | ||
1787 | end: | |
f73fabfd | 1788 | return LTTNG_OK; |
2f77fc4b DG |
1789 | |
1790 | consumer_error: | |
1791 | session_destroy(session); | |
1792 | session_error: | |
1793 | find_error: | |
1794 | return ret; | |
1795 | } | |
1796 | ||
1797 | /* | |
1798 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1799 | */ | |
1800 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1801 | { | |
1802 | int ret; | |
1803 | struct ltt_ust_session *usess; | |
1804 | struct ltt_kernel_session *ksess; | |
1805 | ||
1806 | /* Safety net */ | |
1807 | assert(session); | |
1808 | ||
1809 | usess = session->ust_session; | |
1810 | ksess = session->kernel_session; | |
1811 | ||
1812 | /* Clean kernel session teardown */ | |
1813 | kernel_destroy_session(ksess); | |
1814 | ||
1815 | /* UST session teardown */ | |
1816 | if (usess) { | |
1817 | /* Close any relayd session */ | |
1818 | consumer_output_send_destroy_relayd(usess->consumer); | |
1819 | ||
1820 | /* Destroy every UST application related to this session. */ | |
1821 | ret = ust_app_destroy_trace_all(usess); | |
1822 | if (ret) { | |
1823 | ERR("Error in ust_app_destroy_trace_all"); | |
1824 | } | |
1825 | ||
1826 | /* Clean up the rest. */ | |
1827 | trace_ust_destroy_session(usess); | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * Must notify the kernel thread here to update it's poll set in order to | |
1832 | * remove the channel(s)' fd just destroyed. | |
1833 | */ | |
1834 | ret = notify_thread_pipe(wpipe); | |
1835 | if (ret < 0) { | |
1836 | PERROR("write kernel poll pipe"); | |
1837 | } | |
1838 | ||
1839 | ret = session_destroy(session); | |
1840 | ||
1841 | return ret; | |
1842 | } | |
1843 | ||
1844 | /* | |
1845 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1846 | */ | |
1847 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1848 | { | |
1849 | int ret; | |
1850 | ||
1851 | switch (domain) { | |
1852 | case LTTNG_DOMAIN_KERNEL: | |
1853 | { | |
1854 | struct lttng_kernel_calibrate kcalibrate; | |
1855 | ||
1856 | kcalibrate.type = calibrate->type; | |
1857 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1858 | if (ret < 0) { | |
f73fabfd | 1859 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1860 | goto error; |
1861 | } | |
1862 | break; | |
1863 | } | |
1864 | case LTTNG_DOMAIN_UST: | |
1865 | { | |
1866 | struct lttng_ust_calibrate ucalibrate; | |
1867 | ||
1868 | ucalibrate.type = calibrate->type; | |
1869 | ret = ust_app_calibrate_glb(&ucalibrate); | |
1870 | if (ret < 0) { | |
f73fabfd | 1871 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
1872 | goto error; |
1873 | } | |
1874 | break; | |
1875 | } | |
1876 | default: | |
f73fabfd | 1877 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1878 | goto error; |
1879 | } | |
1880 | ||
f73fabfd | 1881 | ret = LTTNG_OK; |
2f77fc4b DG |
1882 | |
1883 | error: | |
1884 | return ret; | |
1885 | } | |
1886 | ||
1887 | /* | |
1888 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
1889 | */ | |
1890 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
1891 | const char *sock_path, struct consumer_data *cdata) | |
1892 | { | |
1893 | int ret, sock; | |
1894 | struct consumer_socket *socket; | |
1895 | ||
1896 | assert(session); | |
1897 | assert(cdata); | |
1898 | assert(sock_path); | |
1899 | ||
1900 | switch (domain) { | |
1901 | case LTTNG_DOMAIN_KERNEL: | |
1902 | { | |
1903 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1904 | ||
1905 | assert(ksess); | |
1906 | ||
1907 | /* Can't register a consumer if there is already one */ | |
1908 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 1909 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
1910 | goto error; |
1911 | } | |
1912 | ||
1913 | sock = lttcomm_connect_unix_sock(sock_path); | |
1914 | if (sock < 0) { | |
f73fabfd | 1915 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
1916 | goto error; |
1917 | } | |
1918 | ||
1919 | socket = consumer_allocate_socket(sock); | |
1920 | if (socket == NULL) { | |
f73fabfd | 1921 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1922 | close(sock); |
1923 | goto error; | |
1924 | } | |
1925 | ||
1926 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
1927 | if (socket->lock == NULL) { | |
1928 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 1929 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1930 | goto error; |
1931 | } | |
1932 | pthread_mutex_init(socket->lock, NULL); | |
1933 | socket->registered = 1; | |
1934 | ||
1935 | rcu_read_lock(); | |
1936 | consumer_add_socket(socket, ksess->consumer); | |
1937 | rcu_read_unlock(); | |
1938 | ||
1939 | pthread_mutex_lock(&cdata->pid_mutex); | |
1940 | cdata->pid = -1; | |
1941 | pthread_mutex_unlock(&cdata->pid_mutex); | |
1942 | ||
1943 | break; | |
1944 | } | |
1945 | default: | |
1946 | /* TODO: Userspace tracing */ | |
f73fabfd | 1947 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1948 | goto error; |
1949 | } | |
1950 | ||
f73fabfd | 1951 | ret = LTTNG_OK; |
2f77fc4b DG |
1952 | |
1953 | error: | |
1954 | return ret; | |
1955 | } | |
1956 | ||
1957 | /* | |
1958 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
1959 | */ | |
1960 | ssize_t cmd_list_domains(struct ltt_session *session, | |
1961 | struct lttng_domain **domains) | |
1962 | { | |
1963 | int ret, index = 0; | |
1964 | ssize_t nb_dom = 0; | |
1965 | ||
1966 | if (session->kernel_session != NULL) { | |
1967 | DBG3("Listing domains found kernel domain"); | |
1968 | nb_dom++; | |
1969 | } | |
1970 | ||
1971 | if (session->ust_session != NULL) { | |
1972 | DBG3("Listing domains found UST global domain"); | |
1973 | nb_dom++; | |
1974 | } | |
1975 | ||
1976 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
1977 | if (*domains == NULL) { | |
f73fabfd | 1978 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1979 | goto error; |
1980 | } | |
1981 | ||
1982 | if (session->kernel_session != NULL) { | |
1983 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
1984 | index++; | |
1985 | } | |
1986 | ||
1987 | if (session->ust_session != NULL) { | |
1988 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
1989 | index++; | |
1990 | } | |
1991 | ||
1992 | return nb_dom; | |
1993 | ||
1994 | error: | |
f73fabfd DG |
1995 | /* Return negative value to differentiate return code */ |
1996 | return -ret; | |
2f77fc4b DG |
1997 | } |
1998 | ||
1999 | ||
2000 | /* | |
2001 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2002 | */ | |
2003 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2004 | struct lttng_channel **channels) | |
2005 | { | |
2006 | int ret; | |
2007 | ssize_t nb_chan = 0; | |
2008 | ||
2009 | switch (domain) { | |
2010 | case LTTNG_DOMAIN_KERNEL: | |
2011 | if (session->kernel_session != NULL) { | |
2012 | nb_chan = session->kernel_session->channel_count; | |
2013 | } | |
2014 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2015 | if (nb_chan <= 0) { |
2016 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2017 | } | |
2f77fc4b DG |
2018 | break; |
2019 | case LTTNG_DOMAIN_UST: | |
2020 | if (session->ust_session != NULL) { | |
2021 | nb_chan = lttng_ht_get_count( | |
2022 | session->ust_session->domain_global.channels); | |
2023 | } | |
2024 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
2025 | if (nb_chan <= 0) { |
2026 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2027 | } | |
2f77fc4b DG |
2028 | break; |
2029 | default: | |
2030 | *channels = NULL; | |
f73fabfd | 2031 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2032 | goto error; |
2033 | } | |
2034 | ||
2035 | if (nb_chan > 0) { | |
2036 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2037 | if (*channels == NULL) { | |
f73fabfd | 2038 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2039 | goto error; |
2040 | } | |
2041 | ||
2042 | list_lttng_channels(domain, session, *channels); | |
2043 | } else { | |
2044 | *channels = NULL; | |
c7d620a2 DG |
2045 | /* Ret value was set in the domain switch case */ |
2046 | goto error; | |
2f77fc4b DG |
2047 | } |
2048 | ||
2049 | return nb_chan; | |
2050 | ||
2051 | error: | |
f73fabfd DG |
2052 | /* Return negative value to differentiate return code */ |
2053 | return -ret; | |
2f77fc4b DG |
2054 | } |
2055 | ||
2056 | /* | |
2057 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2058 | */ | |
2059 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2060 | char *channel_name, struct lttng_event **events) | |
2061 | { | |
2062 | int ret = 0; | |
2063 | ssize_t nb_event = 0; | |
2064 | ||
2065 | switch (domain) { | |
2066 | case LTTNG_DOMAIN_KERNEL: | |
2067 | if (session->kernel_session != NULL) { | |
2068 | nb_event = list_lttng_kernel_events(channel_name, | |
2069 | session->kernel_session, events); | |
2070 | } | |
2071 | break; | |
2072 | case LTTNG_DOMAIN_UST: | |
2073 | { | |
2074 | if (session->ust_session != NULL) { | |
2075 | nb_event = list_lttng_ust_global_events(channel_name, | |
2076 | &session->ust_session->domain_global, events); | |
2077 | } | |
2078 | break; | |
2079 | } | |
2080 | default: | |
f73fabfd | 2081 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2082 | goto error; |
2083 | } | |
2084 | ||
f73fabfd | 2085 | return nb_event; |
2f77fc4b DG |
2086 | |
2087 | error: | |
f73fabfd DG |
2088 | /* Return negative value to differentiate return code */ |
2089 | return -ret; | |
2f77fc4b DG |
2090 | } |
2091 | ||
2092 | /* | |
2093 | * Using the session list, filled a lttng_session array to send back to the | |
2094 | * client for session listing. | |
2095 | * | |
2096 | * The session list lock MUST be acquired before calling this function. Use | |
2097 | * session_lock_list() and session_unlock_list(). | |
2098 | */ | |
2099 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2100 | gid_t gid) | |
2101 | { | |
2102 | int ret; | |
2103 | unsigned int i = 0; | |
2104 | struct ltt_session *session; | |
2105 | struct ltt_session_list *list = session_get_list(); | |
2106 | ||
2107 | DBG("Getting all available session for UID %d GID %d", | |
2108 | uid, gid); | |
2109 | /* | |
2110 | * Iterate over session list and append data after the control struct in | |
2111 | * the buffer. | |
2112 | */ | |
2113 | cds_list_for_each_entry(session, &list->head, list) { | |
2114 | /* | |
2115 | * Only list the sessions the user can control. | |
2116 | */ | |
2117 | if (!session_access_ok(session, uid, gid)) { | |
2118 | continue; | |
2119 | } | |
2120 | ||
2121 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2122 | struct ltt_ust_session *usess = session->ust_session; | |
2123 | ||
2124 | if (session->consumer->type == CONSUMER_DST_NET || | |
2125 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2126 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2127 | ret = build_network_session_path(sessions[i].path, | |
2128 | sizeof(session[i].path), session); | |
2129 | } else { | |
2130 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2131 | session->consumer->dst.trace_path); | |
2132 | } | |
2133 | if (ret < 0) { | |
2134 | PERROR("snprintf session path"); | |
2135 | continue; | |
2136 | } | |
2137 | ||
2138 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2139 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2140 | sessions[i].enabled = session->enabled; | |
2141 | i++; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | /* | |
2146 | * Command LTTNG_DISABLE_CONSUMER processed by the client thread. | |
2147 | */ | |
2148 | int cmd_disable_consumer(int domain, struct ltt_session *session) | |
2149 | { | |
2150 | int ret; | |
2151 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2152 | struct ltt_ust_session *usess = session->ust_session; | |
2153 | struct consumer_output *consumer; | |
2154 | ||
2155 | assert(session); | |
2156 | ||
2157 | if (session->enabled) { | |
2158 | /* Can't disable consumer on an already started session */ | |
f73fabfd | 2159 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2160 | goto error; |
2161 | } | |
2162 | ||
2163 | if (!session->start_consumer) { | |
f73fabfd | 2164 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2165 | goto error; |
2166 | } | |
2167 | ||
2168 | switch (domain) { | |
2169 | case 0: | |
2170 | DBG("Disable tracing session %s consumer", session->name); | |
2171 | consumer = session->consumer; | |
2172 | break; | |
2173 | case LTTNG_DOMAIN_KERNEL: | |
2174 | /* Code flow error if we don't have a kernel session here. */ | |
2175 | assert(ksess); | |
2176 | ||
2177 | DBG("Disabling kernel consumer"); | |
2178 | consumer = ksess->consumer; | |
2179 | ||
2180 | break; | |
2181 | case LTTNG_DOMAIN_UST: | |
2182 | /* Code flow error if we don't have a UST session here. */ | |
2183 | assert(usess); | |
2184 | ||
2185 | DBG("Disabling UST consumer"); | |
2186 | consumer = usess->consumer; | |
2187 | ||
2188 | break; | |
2189 | default: | |
f73fabfd | 2190 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
2191 | goto error; |
2192 | } | |
2193 | ||
2194 | if (consumer) { | |
2195 | consumer->enabled = 0; | |
2196 | /* Success at this point */ | |
f73fabfd | 2197 | ret = LTTNG_OK; |
2f77fc4b | 2198 | } else { |
f73fabfd | 2199 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2200 | } |
2201 | ||
2202 | error: | |
2203 | return ret; | |
2204 | } | |
2205 | ||
2206 | /* | |
2207 | * Command LTTNG_ENABLE_CONSUMER processed by the client thread. | |
2208 | */ | |
2209 | int cmd_enable_consumer(int domain, struct ltt_session *session) | |
2210 | { | |
2211 | int ret; | |
2212 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2213 | struct ltt_ust_session *usess = session->ust_session; | |
2214 | struct consumer_output *consumer = NULL; | |
2215 | ||
2216 | assert(session); | |
2217 | ||
2218 | /* Can't enable consumer after session started. */ | |
2219 | if (session->enabled) { | |
f73fabfd | 2220 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2221 | goto error; |
2222 | } | |
2223 | ||
2f77fc4b DG |
2224 | switch (domain) { |
2225 | case 0: | |
2226 | assert(session->consumer); | |
2227 | consumer = session->consumer; | |
2228 | break; | |
2229 | case LTTNG_DOMAIN_KERNEL: | |
2230 | /* Code flow error if we don't have a kernel session here. */ | |
2231 | assert(ksess); | |
2232 | ||
2233 | /* | |
2234 | * Check if we have already sent fds to the consumer. In that case, | |
2235 | * the enable-consumer command can't be used because a start trace | |
2236 | * had previously occured. | |
2237 | */ | |
2238 | if (ksess->consumer_fds_sent) { | |
f73fabfd | 2239 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2240 | goto error; |
2241 | } | |
2242 | ||
2243 | consumer = ksess->tmp_consumer; | |
2244 | if (consumer == NULL) { | |
f73fabfd | 2245 | ret = LTTNG_OK; |
2f77fc4b DG |
2246 | /* No temp. consumer output exists. Using the current one. */ |
2247 | DBG3("No temporary consumer. Using default"); | |
2248 | consumer = ksess->consumer; | |
2249 | goto error; | |
2250 | } | |
2251 | ||
2252 | switch (consumer->type) { | |
2253 | case CONSUMER_DST_LOCAL: | |
2254 | DBG2("Consumer output is local. Creating directory(ies)"); | |
2255 | ||
2256 | /* Create directory(ies) */ | |
2257 | ret = run_as_mkdir_recursive(consumer->dst.trace_path, | |
2258 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2259 | if (ret < 0) { | |
2260 | if (ret != -EEXIST) { | |
2261 | ERR("Trace directory creation error"); | |
f73fabfd | 2262 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2263 | goto error; |
2264 | } | |
2265 | } | |
2266 | break; | |
2267 | case CONSUMER_DST_NET: | |
2268 | DBG2("Consumer output is network. Validating URIs"); | |
2269 | /* Validate if we have both control and data path set. */ | |
2270 | if (!consumer->dst.net.control_isset) { | |
f73fabfd | 2271 | ret = LTTNG_ERR_URL_CTRL_MISS; |
2f77fc4b DG |
2272 | goto error; |
2273 | } | |
2274 | ||
2275 | if (!consumer->dst.net.data_isset) { | |
f73fabfd | 2276 | ret = LTTNG_ERR_URL_DATA_MISS; |
2f77fc4b DG |
2277 | goto error; |
2278 | } | |
2279 | ||
2280 | /* Check established network session state */ | |
2281 | if (session->net_handle == 0) { | |
f73fabfd | 2282 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2283 | ERR("Session network handle is not set on enable-consumer"); |
2284 | goto error; | |
2285 | } | |
2286 | ||
2287 | break; | |
2288 | } | |
2289 | ||
2f77fc4b DG |
2290 | /* |
2291 | * @session-lock | |
2292 | * This is race free for now since the session lock is acquired before | |
2293 | * ending up in this function. No other threads can access this kernel | |
2294 | * session without this lock hence freeing the consumer output object | |
2295 | * is valid. | |
2296 | */ | |
2297 | rcu_read_lock(); | |
9a572cf5 | 2298 | /* Destroy current consumer. We are about to replace it */ |
2f77fc4b DG |
2299 | consumer_destroy_output(ksess->consumer); |
2300 | rcu_read_unlock(); | |
2301 | ksess->consumer = consumer; | |
2302 | ksess->tmp_consumer = NULL; | |
2303 | ||
2304 | break; | |
2305 | case LTTNG_DOMAIN_UST: | |
2306 | /* Code flow error if we don't have a UST session here. */ | |
2307 | assert(usess); | |
2308 | ||
2309 | /* | |
2310 | * Check if we have already sent fds to the consumer. In that case, | |
2311 | * the enable-consumer command can't be used because a start trace | |
2312 | * had previously occured. | |
2313 | */ | |
2314 | if (usess->start_trace) { | |
f73fabfd | 2315 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2316 | goto error; |
2317 | } | |
2318 | ||
2319 | consumer = usess->tmp_consumer; | |
2320 | if (consumer == NULL) { | |
f73fabfd | 2321 | ret = LTTNG_OK; |
2f77fc4b DG |
2322 | /* No temp. consumer output exists. Using the current one. */ |
2323 | DBG3("No temporary consumer. Using default"); | |
2324 | consumer = usess->consumer; | |
2325 | goto error; | |
2326 | } | |
2327 | ||
2328 | switch (consumer->type) { | |
2329 | case CONSUMER_DST_LOCAL: | |
2330 | DBG2("Consumer output is local. Creating directory(ies)"); | |
2331 | ||
2332 | /* Create directory(ies) */ | |
2333 | ret = run_as_mkdir_recursive(consumer->dst.trace_path, | |
2334 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2335 | if (ret < 0) { | |
2336 | if (ret != -EEXIST) { | |
2337 | ERR("Trace directory creation error"); | |
f73fabfd | 2338 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2339 | goto error; |
2340 | } | |
2341 | } | |
2342 | break; | |
2343 | case CONSUMER_DST_NET: | |
2344 | DBG2("Consumer output is network. Validating URIs"); | |
2345 | /* Validate if we have both control and data path set. */ | |
2346 | if (!consumer->dst.net.control_isset) { | |
f73fabfd | 2347 | ret = LTTNG_ERR_URL_CTRL_MISS; |
2f77fc4b DG |
2348 | goto error; |
2349 | } | |
2350 | ||
2351 | if (!consumer->dst.net.data_isset) { | |
f73fabfd | 2352 | ret = LTTNG_ERR_URL_DATA_MISS; |
2f77fc4b DG |
2353 | goto error; |
2354 | } | |
2355 | ||
2356 | /* Check established network session state */ | |
2357 | if (session->net_handle == 0) { | |
f73fabfd | 2358 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2359 | DBG2("Session network handle is not set on enable-consumer"); |
2360 | goto error; | |
2361 | } | |
2362 | ||
2363 | if (consumer->net_seq_index == -1) { | |
f73fabfd | 2364 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
2365 | DBG2("Network index is not set on the consumer"); |
2366 | goto error; | |
2367 | } | |
2368 | ||
2369 | break; | |
2370 | } | |
2371 | ||
2f77fc4b DG |
2372 | /* |
2373 | * @session-lock | |
2374 | * This is race free for now since the session lock is acquired before | |
2375 | * ending up in this function. No other threads can access this kernel | |
2376 | * session without this lock hence freeing the consumer output object | |
2377 | * is valid. | |
2378 | */ | |
2379 | rcu_read_lock(); | |
9a572cf5 | 2380 | /* Destroy current consumer. We are about to replace it */ |
2f77fc4b DG |
2381 | consumer_destroy_output(usess->consumer); |
2382 | rcu_read_unlock(); | |
2383 | usess->consumer = consumer; | |
2384 | usess->tmp_consumer = NULL; | |
2385 | ||
2386 | break; | |
2387 | } | |
2388 | ||
4b35a6b3 DG |
2389 | session->start_consumer = 1; |
2390 | ||
2f77fc4b DG |
2391 | /* Enable it */ |
2392 | if (consumer) { | |
2393 | consumer->enabled = 1; | |
2394 | /* Success at this point */ | |
f73fabfd | 2395 | ret = LTTNG_OK; |
2f77fc4b DG |
2396 | } else { |
2397 | /* Should not really happend... */ | |
f73fabfd | 2398 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
2399 | } |
2400 | ||
2401 | error: | |
2402 | return ret; | |
2403 | } | |
2404 | ||
806e2684 | 2405 | /* |
6d805429 DG |
2406 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
2407 | * ready for trace analysis (or anykind of reader) or else 1 for pending data. | |
806e2684 | 2408 | */ |
6d805429 | 2409 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2410 | { |
2411 | int ret; | |
2412 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2413 | struct ltt_ust_session *usess = session->ust_session; | |
2414 | ||
2415 | assert(session); | |
2416 | ||
2417 | /* Session MUST be stopped to ask for data availability. */ | |
2418 | if (session->enabled) { | |
2419 | ret = LTTNG_ERR_SESSION_STARTED; | |
2420 | goto error; | |
2421 | } | |
2422 | ||
2423 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2424 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2425 | if (ret == 1) { | |
806e2684 DG |
2426 | /* Data is still being extracted for the kernel. */ |
2427 | goto error; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | if (usess && usess->consumer) { | |
6d805429 DG |
2432 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2433 | if (ret == 1) { | |
806e2684 DG |
2434 | /* Data is still being extracted for the kernel. */ |
2435 | goto error; | |
2436 | } | |
2437 | } | |
2438 | ||
2439 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2440 | ret = 0; |
806e2684 DG |
2441 | |
2442 | error: | |
2443 | return ret; | |
2444 | } | |
2445 | ||
2f77fc4b DG |
2446 | /* |
2447 | * Init command subsystem. | |
2448 | */ | |
2449 | void cmd_init(void) | |
2450 | { | |
2451 | /* | |
2452 | * Set network sequence index to 1 for streams to match a relayd socket on | |
2453 | * the consumer side. | |
2454 | */ | |
2455 | uatomic_set(&relayd_net_seq_idx, 1); | |
2456 | ||
2457 | DBG("Command subsystem initialized"); | |
2458 | } |