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 | |
d88aee68 DG |
41 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
42 | * held. | |
2f77fc4b | 43 | */ |
d88aee68 DG |
44 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
45 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b DG |
46 | |
47 | /* | |
48 | * Create a session path used by list_lttng_sessions for the case that the | |
49 | * session consumer is on the network. | |
50 | */ | |
51 | static int build_network_session_path(char *dst, size_t size, | |
52 | struct ltt_session *session) | |
53 | { | |
54 | int ret, kdata_port, udata_port; | |
55 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
56 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
57 | ||
58 | assert(session); | |
59 | assert(dst); | |
60 | ||
61 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
62 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
63 | ||
64 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
65 | ||
66 | if (session->kernel_session && session->kernel_session->consumer) { | |
67 | kuri = &session->kernel_session->consumer->dst.net.control; | |
68 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
69 | } | |
70 | ||
71 | if (session->ust_session && session->ust_session->consumer) { | |
72 | uuri = &session->ust_session->consumer->dst.net.control; | |
73 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
74 | } | |
75 | ||
76 | if (uuri == NULL && kuri == NULL) { | |
77 | uri = &session->consumer->dst.net.control; | |
78 | kdata_port = session->consumer->dst.net.data.port; | |
79 | } else if (kuri && uuri) { | |
80 | ret = uri_compare(kuri, uuri); | |
81 | if (ret) { | |
82 | /* Not Equal */ | |
83 | uri = kuri; | |
84 | /* Build uuri URL string */ | |
85 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
86 | if (ret < 0) { | |
87 | goto error; | |
88 | } | |
89 | } else { | |
90 | uri = kuri; | |
91 | } | |
92 | } else if (kuri && uuri == NULL) { | |
93 | uri = kuri; | |
94 | } else if (uuri && kuri == NULL) { | |
95 | uri = uuri; | |
96 | } | |
97 | ||
98 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
99 | if (ret < 0) { | |
100 | goto error; | |
101 | } | |
102 | ||
9aa9f900 DG |
103 | /* |
104 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
105 | * to print. | |
106 | */ | |
9d035200 | 107 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
108 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
109 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
110 | } else { | |
9aa9f900 DG |
111 | int dport; |
112 | if (kuri) { | |
113 | dport = kdata_port; | |
114 | } else { | |
115 | /* No kernel URI, use the UST port. */ | |
116 | dport = udata_port; | |
117 | } | |
118 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
119 | } |
120 | ||
121 | error: | |
122 | return ret; | |
123 | } | |
124 | ||
125 | /* | |
126 | * Fill lttng_channel array of all channels. | |
127 | */ | |
128 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
129 | struct lttng_channel *channels) | |
130 | { | |
131 | int i = 0; | |
132 | struct ltt_kernel_channel *kchan; | |
133 | ||
134 | DBG("Listing channels for session %s", session->name); | |
135 | ||
136 | switch (domain) { | |
137 | case LTTNG_DOMAIN_KERNEL: | |
138 | /* Kernel channels */ | |
139 | if (session->kernel_session != NULL) { | |
140 | cds_list_for_each_entry(kchan, | |
141 | &session->kernel_session->channel_list.head, list) { | |
142 | /* Copy lttng_channel struct to array */ | |
143 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
144 | channels[i].enabled = kchan->enabled; | |
145 | i++; | |
146 | } | |
147 | } | |
148 | break; | |
149 | case LTTNG_DOMAIN_UST: | |
150 | { | |
151 | struct lttng_ht_iter iter; | |
152 | struct ltt_ust_channel *uchan; | |
153 | ||
e7fe706f | 154 | rcu_read_lock(); |
2f77fc4b DG |
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 | } | |
e7fe706f | 174 | rcu_read_unlock(); |
2f77fc4b DG |
175 | break; |
176 | } | |
177 | default: | |
178 | break; | |
179 | } | |
180 | } | |
181 | ||
182 | /* | |
183 | * Create a list of ust global domain events. | |
184 | */ | |
185 | static int list_lttng_ust_global_events(char *channel_name, | |
186 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
187 | { | |
188 | int i = 0, ret = 0; | |
189 | unsigned int nb_event = 0; | |
190 | struct lttng_ht_iter iter; | |
191 | struct lttng_ht_node_str *node; | |
192 | struct ltt_ust_channel *uchan; | |
193 | struct ltt_ust_event *uevent; | |
194 | struct lttng_event *tmp; | |
195 | ||
196 | DBG("Listing UST global events for channel %s", channel_name); | |
197 | ||
198 | rcu_read_lock(); | |
199 | ||
200 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
201 | node = lttng_ht_iter_get_node_str(&iter); | |
202 | if (node == NULL) { | |
f73fabfd | 203 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
204 | goto error; |
205 | } | |
206 | ||
207 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
208 | ||
209 | nb_event += lttng_ht_get_count(uchan->events); | |
210 | ||
211 | if (nb_event == 0) { | |
212 | ret = nb_event; | |
213 | goto error; | |
214 | } | |
215 | ||
216 | DBG3("Listing UST global %d events", nb_event); | |
217 | ||
218 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
219 | if (tmp == NULL) { | |
f73fabfd | 220 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
221 | goto error; |
222 | } | |
223 | ||
224 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
225 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
226 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
227 | tmp[i].enabled = uevent->enabled; | |
228 | ||
229 | switch (uevent->attr.instrumentation) { | |
230 | case LTTNG_UST_TRACEPOINT: | |
231 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
232 | break; | |
233 | case LTTNG_UST_PROBE: | |
234 | tmp[i].type = LTTNG_EVENT_PROBE; | |
235 | break; | |
236 | case LTTNG_UST_FUNCTION: | |
237 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
238 | break; | |
239 | } | |
240 | ||
241 | tmp[i].loglevel = uevent->attr.loglevel; | |
242 | switch (uevent->attr.loglevel_type) { | |
243 | case LTTNG_UST_LOGLEVEL_ALL: | |
244 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
245 | break; | |
246 | case LTTNG_UST_LOGLEVEL_RANGE: | |
247 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
248 | break; | |
249 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
250 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
251 | break; | |
252 | } | |
253 | if (uevent->filter) { | |
254 | tmp[i].filter = 1; | |
255 | } | |
256 | i++; | |
257 | } | |
258 | ||
259 | ret = nb_event; | |
260 | *events = tmp; | |
261 | ||
262 | error: | |
263 | rcu_read_unlock(); | |
264 | return ret; | |
265 | } | |
266 | ||
267 | /* | |
268 | * Fill lttng_event array of all kernel events in the channel. | |
269 | */ | |
270 | static int list_lttng_kernel_events(char *channel_name, | |
271 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
272 | { | |
273 | int i = 0, ret; | |
274 | unsigned int nb_event; | |
275 | struct ltt_kernel_event *event; | |
276 | struct ltt_kernel_channel *kchan; | |
277 | ||
278 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
279 | if (kchan == NULL) { | |
f73fabfd | 280 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
281 | goto error; |
282 | } | |
283 | ||
284 | nb_event = kchan->event_count; | |
285 | ||
286 | DBG("Listing events for channel %s", kchan->channel->name); | |
287 | ||
288 | if (nb_event == 0) { | |
f73fabfd | 289 | goto end; |
2f77fc4b DG |
290 | } |
291 | ||
292 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
293 | if (*events == NULL) { | |
f73fabfd | 294 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
295 | goto error; |
296 | } | |
297 | ||
298 | /* Kernel channels */ | |
299 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
300 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
301 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
302 | (*events)[i].enabled = event->enabled; | |
303 | ||
304 | switch (event->event->instrumentation) { | |
305 | case LTTNG_KERNEL_TRACEPOINT: | |
306 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
307 | break; | |
308 | case LTTNG_KERNEL_KPROBE: | |
309 | case LTTNG_KERNEL_KRETPROBE: | |
310 | (*events)[i].type = LTTNG_EVENT_PROBE; | |
311 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
312 | sizeof(struct lttng_kernel_kprobe)); | |
313 | break; | |
314 | case LTTNG_KERNEL_FUNCTION: | |
315 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
316 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
317 | sizeof(struct lttng_kernel_function)); | |
318 | break; | |
319 | case LTTNG_KERNEL_NOOP: | |
320 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
321 | break; | |
322 | case LTTNG_KERNEL_SYSCALL: | |
323 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
324 | break; | |
325 | case LTTNG_KERNEL_ALL: | |
326 | assert(0); | |
327 | break; | |
328 | } | |
329 | i++; | |
330 | } | |
331 | ||
f73fabfd | 332 | end: |
2f77fc4b DG |
333 | return nb_event; |
334 | ||
335 | error: | |
f73fabfd DG |
336 | /* Negate the error code to differentiate the size from an error */ |
337 | return -ret; | |
2f77fc4b DG |
338 | } |
339 | ||
340 | /* | |
341 | * Add URI so the consumer output object. Set the correct path depending on the | |
342 | * domain adding the default trace directory. | |
343 | */ | |
344 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
345 | struct lttng_uri *uri, int domain, const char *session_name) | |
346 | { | |
f73fabfd | 347 | int ret = LTTNG_OK; |
2f77fc4b DG |
348 | const char *default_trace_dir; |
349 | ||
350 | assert(uri); | |
351 | ||
352 | if (consumer == NULL) { | |
353 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 354 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
355 | goto error; |
356 | } | |
357 | ||
358 | switch (domain) { | |
359 | case LTTNG_DOMAIN_KERNEL: | |
360 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
361 | break; | |
362 | case LTTNG_DOMAIN_UST: | |
363 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
364 | break; | |
365 | default: | |
366 | /* | |
367 | * This case is possible is we try to add the URI to the global tracing | |
368 | * session consumer object which in this case there is no subdir. | |
369 | */ | |
370 | default_trace_dir = ""; | |
371 | } | |
372 | ||
373 | switch (uri->dtype) { | |
374 | case LTTNG_DST_IPV4: | |
375 | case LTTNG_DST_IPV6: | |
376 | DBG2("Setting network URI to consumer"); | |
377 | ||
ffe60014 DG |
378 | consumer->type = CONSUMER_DST_NET; |
379 | ||
785d2d0d DG |
380 | if ((uri->stype == LTTNG_STREAM_CONTROL && |
381 | consumer->dst.net.control_isset) || | |
382 | (uri->stype == LTTNG_STREAM_DATA && | |
383 | consumer->dst.net.data_isset)) { | |
384 | ret = LTTNG_ERR_URL_EXIST; | |
385 | goto error; | |
386 | } | |
387 | ||
2f77fc4b DG |
388 | /* Set URI into consumer output object */ |
389 | ret = consumer_set_network_uri(consumer, uri); | |
390 | if (ret < 0) { | |
f73fabfd | 391 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
392 | goto error; |
393 | } else if (ret == 1) { | |
394 | /* | |
395 | * URI was the same in the consumer so we do not append the subdir | |
396 | * again so to not duplicate output dir. | |
397 | */ | |
398 | goto error; | |
399 | } | |
400 | ||
401 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
402 | ret = consumer_set_subdir(consumer, session_name); | |
403 | if (ret < 0) { | |
f73fabfd | 404 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
405 | goto error; |
406 | } | |
407 | } | |
408 | ||
409 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
410 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
411 | strncat(consumer->subdir, default_trace_dir, |
412 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
413 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
414 | } | |
415 | ||
416 | break; | |
417 | case LTTNG_DST_PATH: | |
418 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
419 | memset(consumer->dst.trace_path, 0, | |
420 | sizeof(consumer->dst.trace_path)); | |
421 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
422 | sizeof(consumer->dst.trace_path)); | |
423 | /* Append default trace dir */ | |
424 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
425 | sizeof(consumer->dst.trace_path) - |
426 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
427 | /* Flag consumer as local. */ |
428 | consumer->type = CONSUMER_DST_LOCAL; | |
429 | break; | |
430 | } | |
431 | ||
432 | error: | |
433 | return ret; | |
434 | } | |
435 | ||
436 | /* | |
437 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
438 | */ | |
439 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
440 | { | |
441 | int ret = 0; | |
442 | struct lttng_ht_iter iter; | |
443 | struct consumer_socket *socket; | |
444 | ||
445 | assert(session); | |
446 | ||
e7fe706f DG |
447 | rcu_read_lock(); |
448 | ||
2f77fc4b DG |
449 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
450 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
451 | socket, node.node) { | |
452 | /* Code flow error */ | |
453 | assert(socket->fd >= 0); | |
454 | ||
455 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 456 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
457 | pthread_mutex_unlock(socket->lock); |
458 | if (ret < 0) { | |
f73fabfd | 459 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
460 | goto error; |
461 | } | |
462 | } | |
463 | } | |
464 | ||
465 | error: | |
e7fe706f | 466 | rcu_read_unlock(); |
2f77fc4b DG |
467 | return ret; |
468 | } | |
469 | ||
470 | /* | |
471 | * Create a socket to the relayd using the URI. | |
472 | * | |
473 | * On success, the relayd_sock pointer is set to the created socket. | |
474 | * Else, it's stays untouched and a lttcomm error code is returned. | |
475 | */ | |
476 | static int create_connect_relayd(struct consumer_output *output, | |
477 | const char *session_name, struct lttng_uri *uri, | |
478 | struct lttcomm_sock **relayd_sock) | |
479 | { | |
480 | int ret; | |
481 | struct lttcomm_sock *sock; | |
482 | ||
483 | /* Create socket object from URI */ | |
484 | sock = lttcomm_alloc_sock_from_uri(uri); | |
485 | if (sock == NULL) { | |
f73fabfd | 486 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
487 | goto error; |
488 | } | |
489 | ||
490 | ret = lttcomm_create_sock(sock); | |
491 | if (ret < 0) { | |
f73fabfd | 492 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
493 | goto error; |
494 | } | |
495 | ||
ffe60014 DG |
496 | /* |
497 | * Connect to relayd so we can proceed with a session creation. This call | |
498 | * can possibly block for an arbitrary amount of time to set the health | |
499 | * state to be in poll execution. | |
500 | */ | |
501 | health_poll_entry(); | |
2f77fc4b | 502 | ret = relayd_connect(sock); |
ffe60014 | 503 | health_poll_exit(); |
2f77fc4b DG |
504 | if (ret < 0) { |
505 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 506 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
507 | goto free_sock; |
508 | } | |
509 | ||
510 | /* Create socket for control stream. */ | |
511 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
512 | DBG3("Creating relayd stream socket from URI"); | |
513 | ||
514 | /* Check relayd version */ | |
515 | ret = relayd_version_check(sock, RELAYD_VERSION_COMM_MAJOR, | |
516 | RELAYD_VERSION_COMM_MINOR); | |
517 | if (ret < 0) { | |
f73fabfd | 518 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
519 | goto close_sock; |
520 | } | |
521 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
522 | DBG3("Creating relayd data socket from URI"); | |
523 | } else { | |
524 | /* Command is not valid */ | |
525 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 526 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
527 | goto close_sock; |
528 | } | |
529 | ||
530 | *relayd_sock = sock; | |
531 | ||
f73fabfd | 532 | return LTTNG_OK; |
2f77fc4b DG |
533 | |
534 | close_sock: | |
535 | if (sock) { | |
536 | (void) relayd_close(sock); | |
537 | } | |
538 | free_sock: | |
539 | if (sock) { | |
540 | lttcomm_destroy_sock(sock); | |
541 | } | |
542 | error: | |
543 | return ret; | |
544 | } | |
545 | ||
546 | /* | |
547 | * Connect to the relayd using URI and send the socket to the right consumer. | |
548 | */ | |
549 | static int send_consumer_relayd_socket(int domain, struct ltt_session *session, | |
550 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
f50f23d9 | 551 | struct consumer_socket *consumer_sock) |
2f77fc4b DG |
552 | { |
553 | int ret; | |
554 | struct lttcomm_sock *sock = NULL; | |
555 | ||
ffe60014 DG |
556 | /* Connect to relayd and make version check if uri is the control. */ |
557 | ret = create_connect_relayd(consumer, session->name, relayd_uri, &sock); | |
558 | if (ret != LTTNG_OK) { | |
559 | goto close_sock; | |
560 | } | |
561 | ||
562 | /* If the control socket is connected, network session is ready */ | |
563 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
564 | session->net_handle = 1; | |
565 | } | |
566 | ||
2f77fc4b | 567 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
568 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
569 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
570 | /* |
571 | * Increment net_seq_idx because we are about to transfer the | |
572 | * new relayd socket to the consumer. | |
d88aee68 | 573 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 574 | */ |
d88aee68 DG |
575 | consumer->net_seq_index = ++relayd_net_seq_idx; |
576 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
577 | } |
578 | ||
2f77fc4b | 579 | /* Send relayd socket to consumer. */ |
f50f23d9 | 580 | ret = consumer_send_relayd_socket(consumer_sock, sock, |
46e6455f | 581 | consumer, relayd_uri->stype, session->id); |
2f77fc4b | 582 | if (ret < 0) { |
f73fabfd | 583 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
584 | goto close_sock; |
585 | } | |
586 | ||
c890b720 DG |
587 | /* Flag that the corresponding socket was sent. */ |
588 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 589 | consumer_sock->control_sock_sent = 1; |
c890b720 | 590 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 591 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
592 | } |
593 | ||
f73fabfd | 594 | ret = LTTNG_OK; |
2f77fc4b DG |
595 | |
596 | /* | |
597 | * Close socket which was dup on the consumer side. The session daemon does | |
598 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
599 | */ | |
600 | ||
601 | close_sock: | |
602 | if (sock) { | |
603 | (void) relayd_close(sock); | |
604 | lttcomm_destroy_sock(sock); | |
605 | } | |
606 | ||
ffe60014 DG |
607 | if (ret != LTTNG_OK) { |
608 | /* | |
609 | * On error, nullify the consumer sequence index so streams are not | |
610 | * associated with it once sent to the consumer. | |
611 | */ | |
612 | uatomic_set(&consumer->net_seq_index, -1); | |
613 | } | |
614 | ||
2f77fc4b DG |
615 | return ret; |
616 | } | |
617 | ||
618 | /* | |
619 | * Send both relayd sockets to a specific consumer and domain. This is a | |
620 | * helper function to facilitate sending the information to the consumer for a | |
621 | * session. | |
622 | */ | |
623 | static int send_consumer_relayd_sockets(int domain, | |
f50f23d9 DG |
624 | struct ltt_session *session, struct consumer_output *consumer, |
625 | struct consumer_socket *sock) | |
2f77fc4b | 626 | { |
dda67f6c | 627 | int ret = LTTNG_OK; |
2f77fc4b DG |
628 | |
629 | assert(session); | |
630 | assert(consumer); | |
631 | ||
2f77fc4b | 632 | /* Sending control relayd socket. */ |
ffe60014 | 633 | if (!sock->control_sock_sent) { |
c890b720 | 634 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 635 | &consumer->dst.net.control, consumer, sock); |
c890b720 DG |
636 | if (ret != LTTNG_OK) { |
637 | goto error; | |
638 | } | |
2f77fc4b DG |
639 | } |
640 | ||
641 | /* Sending data relayd socket. */ | |
ffe60014 | 642 | if (!sock->data_sock_sent) { |
c890b720 | 643 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 644 | &consumer->dst.net.data, consumer, sock); |
c890b720 DG |
645 | if (ret != LTTNG_OK) { |
646 | goto error; | |
647 | } | |
2f77fc4b DG |
648 | } |
649 | ||
2f77fc4b DG |
650 | error: |
651 | return ret; | |
652 | } | |
653 | ||
654 | /* | |
655 | * Setup relayd connections for a tracing session. First creates the socket to | |
656 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
657 | * network. | |
658 | */ | |
ffe60014 | 659 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 660 | { |
f73fabfd | 661 | int ret = LTTNG_OK; |
2f77fc4b DG |
662 | struct ltt_ust_session *usess; |
663 | struct ltt_kernel_session *ksess; | |
664 | struct consumer_socket *socket; | |
665 | struct lttng_ht_iter iter; | |
666 | ||
667 | assert(session); | |
668 | ||
669 | usess = session->ust_session; | |
670 | ksess = session->kernel_session; | |
671 | ||
785d2d0d | 672 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 673 | |
e7fe706f DG |
674 | rcu_read_lock(); |
675 | ||
2f77fc4b DG |
676 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
677 | && usess->consumer->enabled) { | |
678 | /* For each consumer socket, send relayd sockets */ | |
679 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
680 | socket, node.node) { | |
681 | /* Code flow error */ | |
682 | assert(socket->fd >= 0); | |
683 | ||
684 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 685 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session, |
f50f23d9 | 686 | usess->consumer, socket); |
2f77fc4b | 687 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 688 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
689 | goto error; |
690 | } | |
691 | } | |
692 | } | |
693 | ||
694 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
695 | && ksess->consumer->enabled) { | |
696 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
697 | socket, node.node) { | |
698 | /* Code flow error */ | |
699 | assert(socket->fd >= 0); | |
700 | ||
701 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 702 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session, |
f50f23d9 | 703 | ksess->consumer, socket); |
2f77fc4b | 704 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 705 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
706 | goto error; |
707 | } | |
708 | } | |
709 | } | |
710 | ||
711 | error: | |
e7fe706f | 712 | rcu_read_unlock(); |
2f77fc4b DG |
713 | return ret; |
714 | } | |
715 | ||
9b6c7ec5 DG |
716 | /* |
717 | * Start a kernel session by opening all necessary streams. | |
718 | */ | |
719 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
720 | { | |
721 | int ret; | |
722 | struct ltt_kernel_channel *kchan; | |
723 | ||
724 | /* Open kernel metadata */ | |
725 | if (ksess->metadata == NULL) { | |
726 | ret = kernel_open_metadata(ksess); | |
727 | if (ret < 0) { | |
728 | ret = LTTNG_ERR_KERN_META_FAIL; | |
729 | goto error; | |
730 | } | |
731 | } | |
732 | ||
733 | /* Open kernel metadata stream */ | |
734 | if (ksess->metadata_stream_fd < 0) { | |
735 | ret = kernel_open_metadata_stream(ksess); | |
736 | if (ret < 0) { | |
737 | ERR("Kernel create metadata stream failed"); | |
738 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
739 | goto error; | |
740 | } | |
741 | } | |
742 | ||
743 | /* For each channel */ | |
744 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
745 | if (kchan->stream_count == 0) { | |
746 | ret = kernel_open_channel_stream(kchan); | |
747 | if (ret < 0) { | |
748 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
749 | goto error; | |
750 | } | |
751 | /* Update the stream global counter */ | |
752 | ksess->stream_count_global += ret; | |
753 | } | |
754 | } | |
755 | ||
756 | /* Setup kernel consumer socket and send fds to it */ | |
757 | ret = init_kernel_tracing(ksess); | |
758 | if (ret < 0) { | |
759 | ret = LTTNG_ERR_KERN_START_FAIL; | |
760 | goto error; | |
761 | } | |
762 | ||
763 | /* This start the kernel tracing */ | |
764 | ret = kernel_start_session(ksess); | |
765 | if (ret < 0) { | |
766 | ret = LTTNG_ERR_KERN_START_FAIL; | |
767 | goto error; | |
768 | } | |
769 | ||
770 | /* Quiescent wait after starting trace */ | |
784303b0 | 771 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
772 | |
773 | ksess->started = 1; | |
774 | ||
775 | ret = LTTNG_OK; | |
776 | ||
777 | error: | |
778 | return ret; | |
779 | } | |
780 | ||
2f77fc4b DG |
781 | /* |
782 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
783 | */ | |
784 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
785 | char *channel_name) | |
786 | { | |
787 | int ret; | |
788 | struct ltt_ust_session *usess; | |
789 | ||
790 | usess = session->ust_session; | |
791 | ||
2223c96f DG |
792 | rcu_read_lock(); |
793 | ||
2f77fc4b DG |
794 | switch (domain) { |
795 | case LTTNG_DOMAIN_KERNEL: | |
796 | { | |
797 | ret = channel_kernel_disable(session->kernel_session, | |
798 | channel_name); | |
f73fabfd | 799 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
800 | goto error; |
801 | } | |
802 | ||
803 | kernel_wait_quiescent(kernel_tracer_fd); | |
804 | break; | |
805 | } | |
806 | case LTTNG_DOMAIN_UST: | |
807 | { | |
808 | struct ltt_ust_channel *uchan; | |
809 | struct lttng_ht *chan_ht; | |
810 | ||
811 | chan_ht = usess->domain_global.channels; | |
812 | ||
813 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
814 | if (uchan == NULL) { | |
f73fabfd | 815 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
816 | goto error; |
817 | } | |
818 | ||
819 | ret = channel_ust_disable(usess, domain, uchan); | |
f73fabfd | 820 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
821 | goto error; |
822 | } | |
823 | break; | |
824 | } | |
825 | #if 0 | |
826 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
827 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
828 | case LTTNG_DOMAIN_UST_PID: | |
829 | #endif | |
830 | default: | |
f73fabfd | 831 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
832 | goto error; |
833 | } | |
834 | ||
f73fabfd | 835 | ret = LTTNG_OK; |
2f77fc4b DG |
836 | |
837 | error: | |
2223c96f | 838 | rcu_read_unlock(); |
2f77fc4b DG |
839 | return ret; |
840 | } | |
841 | ||
842 | /* | |
843 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
844 | * | |
845 | * The wpipe arguments is used as a notifier for the kernel thread. | |
846 | */ | |
847 | int cmd_enable_channel(struct ltt_session *session, | |
848 | int domain, struct lttng_channel *attr, int wpipe) | |
849 | { | |
850 | int ret; | |
851 | struct ltt_ust_session *usess = session->ust_session; | |
852 | struct lttng_ht *chan_ht; | |
853 | ||
854 | assert(session); | |
855 | assert(attr); | |
856 | ||
857 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
858 | ||
2223c96f DG |
859 | rcu_read_lock(); |
860 | ||
2f77fc4b DG |
861 | switch (domain) { |
862 | case LTTNG_DOMAIN_KERNEL: | |
863 | { | |
864 | struct ltt_kernel_channel *kchan; | |
865 | ||
2f77fc4b DG |
866 | kchan = trace_kernel_get_channel_by_name(attr->name, |
867 | session->kernel_session); | |
868 | if (kchan == NULL) { | |
869 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
870 | } else { | |
871 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
872 | } | |
873 | ||
f73fabfd | 874 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
875 | goto error; |
876 | } | |
877 | ||
784303b0 | 878 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
879 | |
880 | /* | |
881 | * If the session was previously started, start as well this newly | |
882 | * created kernel session so the events/channels enabled *after* the | |
883 | * start actually work. | |
884 | */ | |
885 | if (session->started && !session->kernel_session->started) { | |
886 | ret = start_kernel_session(session->kernel_session, wpipe); | |
887 | if (ret != LTTNG_OK) { | |
888 | goto error; | |
889 | } | |
890 | } | |
2f77fc4b DG |
891 | break; |
892 | } | |
893 | case LTTNG_DOMAIN_UST: | |
894 | { | |
895 | struct ltt_ust_channel *uchan; | |
896 | ||
897 | chan_ht = usess->domain_global.channels; | |
898 | ||
899 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
900 | if (uchan == NULL) { | |
901 | ret = channel_ust_create(usess, domain, attr); | |
902 | } else { | |
903 | ret = channel_ust_enable(usess, domain, uchan); | |
904 | } | |
9b6c7ec5 DG |
905 | |
906 | /* Start the UST session if the session was already started. */ | |
907 | if (session->started && !usess->start_trace) { | |
908 | ret = ust_app_start_trace_all(usess); | |
909 | if (ret < 0) { | |
910 | ret = LTTNG_ERR_UST_START_FAIL; | |
911 | goto error; | |
912 | } | |
913 | ret = LTTNG_OK; | |
914 | usess->start_trace = 1; | |
915 | } | |
2f77fc4b DG |
916 | break; |
917 | } | |
918 | #if 0 | |
919 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
920 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
921 | case LTTNG_DOMAIN_UST_PID: | |
922 | #endif | |
923 | default: | |
f73fabfd | 924 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
925 | goto error; |
926 | } | |
927 | ||
928 | error: | |
2223c96f | 929 | rcu_read_unlock(); |
2f77fc4b DG |
930 | return ret; |
931 | } | |
932 | ||
933 | ||
934 | /* | |
935 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
936 | */ | |
937 | int cmd_disable_event(struct ltt_session *session, int domain, | |
938 | char *channel_name, char *event_name) | |
939 | { | |
940 | int ret; | |
941 | ||
2223c96f DG |
942 | rcu_read_lock(); |
943 | ||
2f77fc4b DG |
944 | switch (domain) { |
945 | case LTTNG_DOMAIN_KERNEL: | |
946 | { | |
947 | struct ltt_kernel_channel *kchan; | |
948 | struct ltt_kernel_session *ksess; | |
949 | ||
950 | ksess = session->kernel_session; | |
951 | ||
952 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
953 | if (kchan == NULL) { | |
f73fabfd | 954 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
955 | goto error; |
956 | } | |
957 | ||
d3a56674 | 958 | ret = event_kernel_disable_tracepoint(kchan, event_name); |
f73fabfd | 959 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
960 | goto error; |
961 | } | |
962 | ||
963 | kernel_wait_quiescent(kernel_tracer_fd); | |
964 | break; | |
965 | } | |
966 | case LTTNG_DOMAIN_UST: | |
967 | { | |
968 | struct ltt_ust_channel *uchan; | |
969 | struct ltt_ust_session *usess; | |
970 | ||
971 | usess = session->ust_session; | |
972 | ||
973 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
974 | channel_name); | |
975 | if (uchan == NULL) { | |
f73fabfd | 976 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
977 | goto error; |
978 | } | |
979 | ||
980 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); | |
f73fabfd | 981 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
982 | goto error; |
983 | } | |
984 | ||
985 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
986 | channel_name); | |
987 | break; | |
988 | } | |
989 | #if 0 | |
990 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
991 | case LTTNG_DOMAIN_UST_PID: | |
992 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
993 | #endif | |
994 | default: | |
f73fabfd | 995 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
996 | goto error; |
997 | } | |
998 | ||
f73fabfd | 999 | ret = LTTNG_OK; |
2f77fc4b DG |
1000 | |
1001 | error: | |
2223c96f | 1002 | rcu_read_unlock(); |
2f77fc4b DG |
1003 | return ret; |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
1008 | */ | |
1009 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
1010 | char *channel_name) | |
1011 | { | |
1012 | int ret; | |
1013 | ||
2223c96f DG |
1014 | rcu_read_lock(); |
1015 | ||
2f77fc4b DG |
1016 | switch (domain) { |
1017 | case LTTNG_DOMAIN_KERNEL: | |
1018 | { | |
1019 | struct ltt_kernel_session *ksess; | |
1020 | struct ltt_kernel_channel *kchan; | |
1021 | ||
1022 | ksess = session->kernel_session; | |
1023 | ||
1024 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
1025 | if (kchan == NULL) { | |
f73fabfd | 1026 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1027 | goto error; |
1028 | } | |
1029 | ||
d3a56674 | 1030 | ret = event_kernel_disable_all(kchan); |
f73fabfd | 1031 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1032 | goto error; |
1033 | } | |
1034 | ||
1035 | kernel_wait_quiescent(kernel_tracer_fd); | |
1036 | break; | |
1037 | } | |
1038 | case LTTNG_DOMAIN_UST: | |
1039 | { | |
1040 | struct ltt_ust_session *usess; | |
1041 | struct ltt_ust_channel *uchan; | |
1042 | ||
1043 | usess = session->ust_session; | |
1044 | ||
1045 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1046 | channel_name); | |
1047 | if (uchan == NULL) { | |
f73fabfd | 1048 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1049 | goto error; |
1050 | } | |
1051 | ||
1052 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); | |
1053 | if (ret != 0) { | |
1054 | goto error; | |
1055 | } | |
1056 | ||
1057 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1058 | ||
1059 | break; | |
1060 | } | |
1061 | #if 0 | |
1062 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1063 | case LTTNG_DOMAIN_UST_PID: | |
1064 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1065 | #endif | |
1066 | default: | |
f73fabfd | 1067 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1068 | goto error; |
1069 | } | |
1070 | ||
f73fabfd | 1071 | ret = LTTNG_OK; |
2f77fc4b DG |
1072 | |
1073 | error: | |
2223c96f | 1074 | rcu_read_unlock(); |
2f77fc4b DG |
1075 | return ret; |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1080 | */ | |
1081 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1082 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b DG |
1083 | { |
1084 | int ret; | |
1085 | ||
1086 | switch (domain) { | |
1087 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1088 | assert(session->kernel_session); |
1089 | ||
1090 | if (session->kernel_session->channel_count == 0) { | |
1091 | /* Create default channel */ | |
1092 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1093 | if (ret != LTTNG_OK) { | |
1094 | goto error; | |
1095 | } | |
1096 | } | |
1097 | ||
2f77fc4b | 1098 | /* Add kernel context to kernel tracer */ |
601d5acf | 1099 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1100 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1101 | goto error; |
1102 | } | |
1103 | break; | |
1104 | case LTTNG_DOMAIN_UST: | |
1105 | { | |
1106 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
1107 | assert(usess); |
1108 | ||
979e618e DG |
1109 | unsigned int chan_count = |
1110 | lttng_ht_get_count(usess->domain_global.channels); | |
1111 | if (chan_count == 0) { | |
1112 | struct lttng_channel *attr; | |
1113 | /* Create default channel */ | |
1114 | attr = channel_new_default_attr(domain); | |
1115 | if (attr == NULL) { | |
1116 | ret = LTTNG_ERR_FATAL; | |
1117 | goto error; | |
1118 | } | |
1119 | ||
1120 | ret = channel_ust_create(usess, domain, attr); | |
1121 | if (ret != LTTNG_OK) { | |
1122 | free(attr); | |
1123 | goto error; | |
1124 | } | |
1125 | free(attr); | |
1126 | } | |
1127 | ||
601d5acf | 1128 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1129 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1130 | goto error; |
1131 | } | |
1132 | break; | |
1133 | } | |
1134 | #if 0 | |
1135 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1136 | case LTTNG_DOMAIN_UST_PID: | |
1137 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1138 | #endif | |
1139 | default: | |
f73fabfd | 1140 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1141 | goto error; |
1142 | } | |
1143 | ||
f73fabfd | 1144 | ret = LTTNG_OK; |
2f77fc4b DG |
1145 | |
1146 | error: | |
1147 | return ret; | |
1148 | } | |
1149 | ||
2f77fc4b DG |
1150 | /* |
1151 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1152 | */ | |
1153 | int cmd_enable_event(struct ltt_session *session, int domain, | |
025faf73 DG |
1154 | char *channel_name, struct lttng_event *event, |
1155 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b | 1156 | { |
e5f5db7f | 1157 | int ret, channel_created = 0; |
2f77fc4b DG |
1158 | struct lttng_channel *attr; |
1159 | ||
1160 | assert(session); | |
1161 | assert(event); | |
1162 | assert(channel_name); | |
1163 | ||
2223c96f DG |
1164 | rcu_read_lock(); |
1165 | ||
2f77fc4b DG |
1166 | switch (domain) { |
1167 | case LTTNG_DOMAIN_KERNEL: | |
1168 | { | |
1169 | struct ltt_kernel_channel *kchan; | |
1170 | ||
1171 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1172 | session->kernel_session); | |
1173 | if (kchan == NULL) { | |
1174 | attr = channel_new_default_attr(domain); | |
1175 | if (attr == NULL) { | |
f73fabfd | 1176 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1177 | goto error; |
1178 | } | |
1179 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1180 | ||
1181 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1182 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1183 | free(attr); |
1184 | goto error; | |
1185 | } | |
1186 | free(attr); | |
e5f5db7f DG |
1187 | |
1188 | channel_created = 1; | |
2f77fc4b DG |
1189 | } |
1190 | ||
1191 | /* Get the newly created kernel channel pointer */ | |
1192 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1193 | session->kernel_session); | |
1194 | if (kchan == NULL) { | |
1195 | /* This sould not happen... */ | |
f73fabfd | 1196 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1197 | goto error; |
1198 | } | |
1199 | ||
d3a56674 | 1200 | ret = event_kernel_enable_tracepoint(kchan, event); |
f73fabfd | 1201 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1202 | if (channel_created) { |
1203 | /* Let's not leak a useless channel. */ | |
1204 | kernel_destroy_channel(kchan); | |
1205 | } | |
2f77fc4b DG |
1206 | goto error; |
1207 | } | |
1208 | ||
1209 | kernel_wait_quiescent(kernel_tracer_fd); | |
1210 | break; | |
1211 | } | |
1212 | case LTTNG_DOMAIN_UST: | |
1213 | { | |
1214 | struct ltt_ust_channel *uchan; | |
1215 | struct ltt_ust_session *usess = session->ust_session; | |
1216 | ||
1217 | assert(usess); | |
1218 | ||
1219 | /* Get channel from global UST domain */ | |
1220 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1221 | channel_name); | |
1222 | if (uchan == NULL) { | |
1223 | /* Create default channel */ | |
1224 | attr = channel_new_default_attr(domain); | |
1225 | if (attr == NULL) { | |
f73fabfd | 1226 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1227 | goto error; |
1228 | } | |
1229 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1230 | ||
1231 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1232 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1233 | free(attr); |
1234 | goto error; | |
1235 | } | |
1236 | free(attr); | |
1237 | ||
1238 | /* Get the newly created channel reference back */ | |
1239 | uchan = trace_ust_find_channel_by_name( | |
1240 | usess->domain_global.channels, channel_name); | |
1241 | assert(uchan); | |
1242 | } | |
1243 | ||
1244 | /* At this point, the session and channel exist on the tracer */ | |
025faf73 | 1245 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event, filter); |
f73fabfd | 1246 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1247 | goto error; |
1248 | } | |
1249 | break; | |
1250 | } | |
1251 | #if 0 | |
1252 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1253 | case LTTNG_DOMAIN_UST_PID: | |
1254 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1255 | #endif | |
1256 | default: | |
f73fabfd | 1257 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1258 | goto error; |
1259 | } | |
1260 | ||
f73fabfd | 1261 | ret = LTTNG_OK; |
2f77fc4b DG |
1262 | |
1263 | error: | |
2223c96f | 1264 | rcu_read_unlock(); |
2f77fc4b DG |
1265 | return ret; |
1266 | } | |
1267 | ||
1268 | /* | |
1269 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1270 | */ | |
1271 | int cmd_enable_event_all(struct ltt_session *session, int domain, | |
025faf73 DG |
1272 | char *channel_name, int event_type, |
1273 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b DG |
1274 | { |
1275 | int ret; | |
1276 | struct lttng_channel *attr; | |
1277 | ||
1278 | assert(session); | |
1279 | assert(channel_name); | |
1280 | ||
2223c96f DG |
1281 | rcu_read_lock(); |
1282 | ||
2f77fc4b DG |
1283 | switch (domain) { |
1284 | case LTTNG_DOMAIN_KERNEL: | |
1285 | { | |
1286 | struct ltt_kernel_channel *kchan; | |
1287 | ||
1288 | assert(session->kernel_session); | |
1289 | ||
1290 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1291 | session->kernel_session); | |
1292 | if (kchan == NULL) { | |
1293 | /* Create default channel */ | |
1294 | attr = channel_new_default_attr(domain); | |
1295 | if (attr == NULL) { | |
f73fabfd | 1296 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1297 | goto error; |
1298 | } | |
1299 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1300 | ||
1301 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1302 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1303 | free(attr); |
1304 | goto error; | |
1305 | } | |
1306 | free(attr); | |
1307 | ||
1308 | /* Get the newly created kernel channel pointer */ | |
1309 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1310 | session->kernel_session); | |
1311 | assert(kchan); | |
1312 | } | |
1313 | ||
1314 | switch (event_type) { | |
1315 | case LTTNG_EVENT_SYSCALL: | |
d3a56674 | 1316 | ret = event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1317 | break; |
1318 | case LTTNG_EVENT_TRACEPOINT: | |
1319 | /* | |
1320 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1321 | * events already registered to the channel. | |
1322 | */ | |
d3a56674 | 1323 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1324 | break; |
1325 | case LTTNG_EVENT_ALL: | |
1326 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1327 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1328 | break; |
1329 | default: | |
f73fabfd | 1330 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1331 | goto error; |
1332 | } | |
1333 | ||
1334 | /* Manage return value */ | |
f73fabfd | 1335 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1336 | /* |
1337 | * On error, cmd_enable_channel call will take care of destroying | |
1338 | * the created channel if it was needed. | |
1339 | */ | |
2f77fc4b DG |
1340 | goto error; |
1341 | } | |
1342 | ||
1343 | kernel_wait_quiescent(kernel_tracer_fd); | |
1344 | break; | |
1345 | } | |
1346 | case LTTNG_DOMAIN_UST: | |
1347 | { | |
1348 | struct ltt_ust_channel *uchan; | |
1349 | struct ltt_ust_session *usess = session->ust_session; | |
1350 | ||
1351 | assert(usess); | |
1352 | ||
1353 | /* Get channel from global UST domain */ | |
1354 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1355 | channel_name); | |
1356 | if (uchan == NULL) { | |
1357 | /* Create default channel */ | |
1358 | attr = channel_new_default_attr(domain); | |
1359 | if (attr == NULL) { | |
f73fabfd | 1360 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1361 | goto error; |
1362 | } | |
1363 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1364 | ||
1365 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1366 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1367 | free(attr); |
1368 | goto error; | |
1369 | } | |
1370 | free(attr); | |
1371 | ||
1372 | /* Get the newly created channel reference back */ | |
1373 | uchan = trace_ust_find_channel_by_name( | |
1374 | usess->domain_global.channels, channel_name); | |
1375 | assert(uchan); | |
1376 | } | |
1377 | ||
1378 | /* At this point, the session and channel exist on the tracer */ | |
1379 | ||
1380 | switch (event_type) { | |
1381 | case LTTNG_EVENT_ALL: | |
1382 | case LTTNG_EVENT_TRACEPOINT: | |
025faf73 DG |
1383 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan, |
1384 | filter); | |
f73fabfd | 1385 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1386 | goto error; |
1387 | } | |
1388 | break; | |
1389 | default: | |
f73fabfd | 1390 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1391 | goto error; |
1392 | } | |
1393 | ||
1394 | /* Manage return value */ | |
f73fabfd | 1395 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1396 | goto error; |
1397 | } | |
1398 | ||
1399 | break; | |
1400 | } | |
1401 | #if 0 | |
1402 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1403 | case LTTNG_DOMAIN_UST_PID: | |
1404 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1405 | #endif | |
1406 | default: | |
f73fabfd | 1407 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1408 | goto error; |
1409 | } | |
1410 | ||
f73fabfd | 1411 | ret = LTTNG_OK; |
2f77fc4b DG |
1412 | |
1413 | error: | |
2223c96f | 1414 | rcu_read_unlock(); |
2f77fc4b DG |
1415 | return ret; |
1416 | } | |
1417 | ||
1418 | ||
1419 | /* | |
1420 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1421 | */ | |
1422 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1423 | { | |
1424 | int ret; | |
1425 | ssize_t nb_events = 0; | |
1426 | ||
1427 | switch (domain) { | |
1428 | case LTTNG_DOMAIN_KERNEL: | |
1429 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1430 | if (nb_events < 0) { | |
f73fabfd | 1431 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1432 | goto error; |
1433 | } | |
1434 | break; | |
1435 | case LTTNG_DOMAIN_UST: | |
1436 | nb_events = ust_app_list_events(events); | |
1437 | if (nb_events < 0) { | |
f73fabfd | 1438 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1439 | goto error; |
1440 | } | |
1441 | break; | |
1442 | default: | |
f73fabfd | 1443 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1444 | goto error; |
1445 | } | |
1446 | ||
1447 | return nb_events; | |
1448 | ||
1449 | error: | |
1450 | /* Return negative value to differentiate return code */ | |
1451 | return -ret; | |
1452 | } | |
1453 | ||
1454 | /* | |
1455 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1456 | */ | |
1457 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1458 | struct lttng_event_field **fields) | |
1459 | { | |
1460 | int ret; | |
1461 | ssize_t nb_fields = 0; | |
1462 | ||
1463 | switch (domain) { | |
1464 | case LTTNG_DOMAIN_UST: | |
1465 | nb_fields = ust_app_list_event_fields(fields); | |
1466 | if (nb_fields < 0) { | |
f73fabfd | 1467 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1468 | goto error; |
1469 | } | |
1470 | break; | |
1471 | case LTTNG_DOMAIN_KERNEL: | |
1472 | default: /* fall-through */ | |
f73fabfd | 1473 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1474 | goto error; |
1475 | } | |
1476 | ||
1477 | return nb_fields; | |
1478 | ||
1479 | error: | |
1480 | /* Return negative value to differentiate return code */ | |
1481 | return -ret; | |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * Command LTTNG_START_TRACE processed by the client thread. | |
1486 | */ | |
1487 | int cmd_start_trace(struct ltt_session *session) | |
1488 | { | |
1489 | int ret; | |
1490 | struct ltt_kernel_session *ksession; | |
1491 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1492 | |
1493 | assert(session); | |
1494 | ||
1495 | /* Ease our life a bit ;) */ | |
1496 | ksession = session->kernel_session; | |
1497 | usess = session->ust_session; | |
1498 | ||
1499 | if (session->enabled) { | |
1500 | /* Already started. */ | |
f73fabfd | 1501 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1502 | goto error; |
1503 | } | |
1504 | ||
1505 | session->enabled = 1; | |
1506 | ||
2f77fc4b DG |
1507 | /* Kernel tracing */ |
1508 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1509 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1510 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1511 | goto error; |
1512 | } | |
2f77fc4b DG |
1513 | } |
1514 | ||
1515 | /* Flag session that trace should start automatically */ | |
1516 | if (usess) { | |
1517 | usess->start_trace = 1; | |
1518 | ||
1519 | ret = ust_app_start_trace_all(usess); | |
1520 | if (ret < 0) { | |
f73fabfd | 1521 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1522 | goto error; |
1523 | } | |
1524 | } | |
1525 | ||
9b6c7ec5 DG |
1526 | session->started = 1; |
1527 | ||
f73fabfd | 1528 | ret = LTTNG_OK; |
2f77fc4b DG |
1529 | |
1530 | error: | |
1531 | return ret; | |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1536 | */ | |
1537 | int cmd_stop_trace(struct ltt_session *session) | |
1538 | { | |
1539 | int ret; | |
1540 | struct ltt_kernel_channel *kchan; | |
1541 | struct ltt_kernel_session *ksession; | |
1542 | struct ltt_ust_session *usess; | |
1543 | ||
1544 | assert(session); | |
1545 | ||
1546 | /* Short cut */ | |
1547 | ksession = session->kernel_session; | |
1548 | usess = session->ust_session; | |
1549 | ||
1550 | if (!session->enabled) { | |
f73fabfd | 1551 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1552 | goto error; |
1553 | } | |
1554 | ||
1555 | session->enabled = 0; | |
1556 | ||
1557 | /* Kernel tracer */ | |
1558 | if (ksession) { | |
1559 | DBG("Stop kernel tracing"); | |
1560 | ||
1561 | /* Flush metadata if exist */ | |
1562 | if (ksession->metadata_stream_fd >= 0) { | |
1563 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1564 | if (ret < 0) { | |
1565 | ERR("Kernel metadata flush failed"); | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | /* Flush all buffers before stopping */ | |
1570 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1571 | ret = kernel_flush_buffer(kchan); | |
1572 | if (ret < 0) { | |
1573 | ERR("Kernel flush buffer error"); | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | ret = kernel_stop_session(ksession); | |
1578 | if (ret < 0) { | |
f73fabfd | 1579 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1580 | goto error; |
1581 | } | |
1582 | ||
1583 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 DG |
1584 | |
1585 | ksession->started = 0; | |
2f77fc4b DG |
1586 | } |
1587 | ||
1588 | if (usess) { | |
1589 | usess->start_trace = 0; | |
1590 | ||
1591 | ret = ust_app_stop_trace_all(usess); | |
1592 | if (ret < 0) { | |
f73fabfd | 1593 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1594 | goto error; |
1595 | } | |
1596 | } | |
1597 | ||
9b6c7ec5 DG |
1598 | session->started = 0; |
1599 | ||
f73fabfd | 1600 | ret = LTTNG_OK; |
2f77fc4b DG |
1601 | |
1602 | error: | |
1603 | return ret; | |
1604 | } | |
1605 | ||
1606 | /* | |
1607 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1608 | */ | |
1609 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1610 | size_t nb_uri, struct lttng_uri *uris) | |
1611 | { | |
1612 | int ret, i; | |
1613 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1614 | struct ltt_ust_session *usess = session->ust_session; | |
1615 | struct consumer_output *consumer = NULL; | |
1616 | ||
1617 | assert(session); | |
1618 | assert(uris); | |
1619 | assert(nb_uri > 0); | |
1620 | ||
1621 | /* Can't enable consumer after session started. */ | |
1622 | if (session->enabled) { | |
f73fabfd | 1623 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1624 | goto error; |
1625 | } | |
1626 | ||
2f77fc4b DG |
1627 | /* |
1628 | * This case switch makes sure the domain session has a temporary consumer | |
1629 | * so the URL can be set. | |
1630 | */ | |
1631 | switch (domain) { | |
1632 | case 0: | |
1633 | /* Code flow error. A session MUST always have a consumer object */ | |
1634 | assert(session->consumer); | |
1635 | /* | |
1636 | * The URL will be added to the tracing session consumer instead of a | |
1637 | * specific domain consumer. | |
1638 | */ | |
1639 | consumer = session->consumer; | |
1640 | break; | |
1641 | case LTTNG_DOMAIN_KERNEL: | |
1642 | /* Code flow error if we don't have a kernel session here. */ | |
1643 | assert(ksess); | |
785d2d0d DG |
1644 | assert(ksess->consumer); |
1645 | consumer = ksess->consumer; | |
2f77fc4b DG |
1646 | break; |
1647 | case LTTNG_DOMAIN_UST: | |
1648 | /* Code flow error if we don't have a kernel session here. */ | |
1649 | assert(usess); | |
785d2d0d DG |
1650 | assert(usess->consumer); |
1651 | consumer = usess->consumer; | |
2f77fc4b DG |
1652 | break; |
1653 | } | |
1654 | ||
1655 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b DG |
1656 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
1657 | if (ret < 0) { | |
1658 | goto error; | |
1659 | } | |
2f77fc4b DG |
1660 | } |
1661 | ||
1662 | /* All good! */ | |
f73fabfd | 1663 | ret = LTTNG_OK; |
2f77fc4b DG |
1664 | |
1665 | error: | |
1666 | return ret; | |
1667 | } | |
1668 | ||
1669 | /* | |
1670 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1671 | */ | |
1672 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
1673 | size_t nb_uri, lttng_sock_cred *creds) | |
1674 | { | |
1675 | int ret; | |
1676 | char *path = NULL; | |
1677 | struct ltt_session *session; | |
1678 | ||
1679 | assert(name); | |
1680 | ||
785d2d0d DG |
1681 | /* No URIs is not possible. */ |
1682 | if (uris == NULL) { | |
1683 | ret = LTTNG_ERR_SESSION_FAIL; | |
1684 | goto session_error; | |
1685 | } | |
1686 | ||
2f77fc4b DG |
1687 | /* |
1688 | * Verify if the session already exist | |
1689 | * | |
1690 | * XXX: There is no need for the session lock list here since the caller | |
1691 | * (process_client_msg) is holding it. We might want to change that so a | |
1692 | * single command does not lock the entire session list. | |
1693 | */ | |
1694 | session = session_find_by_name(name); | |
1695 | if (session != NULL) { | |
f73fabfd | 1696 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1697 | goto find_error; |
1698 | } | |
1699 | ||
1700 | /* Create tracing session in the registry */ | |
1701 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), | |
1702 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
f73fabfd | 1703 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1704 | goto session_error; |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * Get the newly created session pointer back | |
1709 | * | |
1710 | * XXX: There is no need for the session lock list here since the caller | |
1711 | * (process_client_msg) is holding it. We might want to change that so a | |
1712 | * single command does not lock the entire session list. | |
1713 | */ | |
1714 | session = session_find_by_name(name); | |
1715 | assert(session); | |
1716 | ||
1717 | /* Create default consumer output for the session not yet created. */ | |
1718 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1719 | if (session->consumer == NULL) { | |
f73fabfd | 1720 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1721 | goto consumer_error; |
1722 | } | |
1723 | ||
2f77fc4b | 1724 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); |
f73fabfd | 1725 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1726 | goto consumer_error; |
1727 | } | |
1728 | ||
1729 | session->consumer->enabled = 1; | |
1730 | ||
f73fabfd | 1731 | return LTTNG_OK; |
2f77fc4b DG |
1732 | |
1733 | consumer_error: | |
1734 | session_destroy(session); | |
1735 | session_error: | |
1736 | find_error: | |
1737 | return ret; | |
1738 | } | |
1739 | ||
1740 | /* | |
1741 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1742 | */ | |
1743 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1744 | { | |
1745 | int ret; | |
1746 | struct ltt_ust_session *usess; | |
1747 | struct ltt_kernel_session *ksess; | |
1748 | ||
1749 | /* Safety net */ | |
1750 | assert(session); | |
1751 | ||
1752 | usess = session->ust_session; | |
1753 | ksess = session->kernel_session; | |
1754 | ||
1755 | /* Clean kernel session teardown */ | |
1756 | kernel_destroy_session(ksess); | |
1757 | ||
1758 | /* UST session teardown */ | |
1759 | if (usess) { | |
1760 | /* Close any relayd session */ | |
1761 | consumer_output_send_destroy_relayd(usess->consumer); | |
1762 | ||
1763 | /* Destroy every UST application related to this session. */ | |
1764 | ret = ust_app_destroy_trace_all(usess); | |
1765 | if (ret) { | |
1766 | ERR("Error in ust_app_destroy_trace_all"); | |
1767 | } | |
1768 | ||
1769 | /* Clean up the rest. */ | |
1770 | trace_ust_destroy_session(usess); | |
1771 | } | |
1772 | ||
1773 | /* | |
1774 | * Must notify the kernel thread here to update it's poll set in order to | |
1775 | * remove the channel(s)' fd just destroyed. | |
1776 | */ | |
1777 | ret = notify_thread_pipe(wpipe); | |
1778 | if (ret < 0) { | |
1779 | PERROR("write kernel poll pipe"); | |
1780 | } | |
1781 | ||
1782 | ret = session_destroy(session); | |
1783 | ||
1784 | return ret; | |
1785 | } | |
1786 | ||
1787 | /* | |
1788 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1789 | */ | |
1790 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1791 | { | |
1792 | int ret; | |
1793 | ||
1794 | switch (domain) { | |
1795 | case LTTNG_DOMAIN_KERNEL: | |
1796 | { | |
1797 | struct lttng_kernel_calibrate kcalibrate; | |
1798 | ||
1799 | kcalibrate.type = calibrate->type; | |
1800 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1801 | if (ret < 0) { | |
f73fabfd | 1802 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1803 | goto error; |
1804 | } | |
1805 | break; | |
1806 | } | |
1807 | case LTTNG_DOMAIN_UST: | |
1808 | { | |
1809 | struct lttng_ust_calibrate ucalibrate; | |
1810 | ||
1811 | ucalibrate.type = calibrate->type; | |
1812 | ret = ust_app_calibrate_glb(&ucalibrate); | |
1813 | if (ret < 0) { | |
f73fabfd | 1814 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
1815 | goto error; |
1816 | } | |
1817 | break; | |
1818 | } | |
1819 | default: | |
f73fabfd | 1820 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1821 | goto error; |
1822 | } | |
1823 | ||
f73fabfd | 1824 | ret = LTTNG_OK; |
2f77fc4b DG |
1825 | |
1826 | error: | |
1827 | return ret; | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
1832 | */ | |
1833 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
1834 | const char *sock_path, struct consumer_data *cdata) | |
1835 | { | |
1836 | int ret, sock; | |
1837 | struct consumer_socket *socket; | |
1838 | ||
1839 | assert(session); | |
1840 | assert(cdata); | |
1841 | assert(sock_path); | |
1842 | ||
1843 | switch (domain) { | |
1844 | case LTTNG_DOMAIN_KERNEL: | |
1845 | { | |
1846 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1847 | ||
1848 | assert(ksess); | |
1849 | ||
1850 | /* Can't register a consumer if there is already one */ | |
1851 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 1852 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
1853 | goto error; |
1854 | } | |
1855 | ||
1856 | sock = lttcomm_connect_unix_sock(sock_path); | |
1857 | if (sock < 0) { | |
f73fabfd | 1858 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
1859 | goto error; |
1860 | } | |
1861 | ||
1862 | socket = consumer_allocate_socket(sock); | |
1863 | if (socket == NULL) { | |
f66c074c DG |
1864 | ret = close(sock); |
1865 | if (ret < 0) { | |
1866 | PERROR("close register consumer"); | |
1867 | } | |
f73fabfd | 1868 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1869 | goto error; |
1870 | } | |
1871 | ||
1872 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
1873 | if (socket->lock == NULL) { | |
1874 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 1875 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1876 | goto error; |
1877 | } | |
1878 | pthread_mutex_init(socket->lock, NULL); | |
1879 | socket->registered = 1; | |
1880 | ||
1881 | rcu_read_lock(); | |
1882 | consumer_add_socket(socket, ksess->consumer); | |
1883 | rcu_read_unlock(); | |
1884 | ||
1885 | pthread_mutex_lock(&cdata->pid_mutex); | |
1886 | cdata->pid = -1; | |
1887 | pthread_mutex_unlock(&cdata->pid_mutex); | |
1888 | ||
1889 | break; | |
1890 | } | |
1891 | default: | |
1892 | /* TODO: Userspace tracing */ | |
f73fabfd | 1893 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1894 | goto error; |
1895 | } | |
1896 | ||
f73fabfd | 1897 | ret = LTTNG_OK; |
2f77fc4b DG |
1898 | |
1899 | error: | |
1900 | return ret; | |
1901 | } | |
1902 | ||
1903 | /* | |
1904 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
1905 | */ | |
1906 | ssize_t cmd_list_domains(struct ltt_session *session, | |
1907 | struct lttng_domain **domains) | |
1908 | { | |
1909 | int ret, index = 0; | |
1910 | ssize_t nb_dom = 0; | |
1911 | ||
1912 | if (session->kernel_session != NULL) { | |
1913 | DBG3("Listing domains found kernel domain"); | |
1914 | nb_dom++; | |
1915 | } | |
1916 | ||
1917 | if (session->ust_session != NULL) { | |
1918 | DBG3("Listing domains found UST global domain"); | |
1919 | nb_dom++; | |
1920 | } | |
1921 | ||
1922 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
1923 | if (*domains == NULL) { | |
f73fabfd | 1924 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1925 | goto error; |
1926 | } | |
1927 | ||
1928 | if (session->kernel_session != NULL) { | |
1929 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
1930 | index++; | |
1931 | } | |
1932 | ||
1933 | if (session->ust_session != NULL) { | |
1934 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
1935 | index++; | |
1936 | } | |
1937 | ||
1938 | return nb_dom; | |
1939 | ||
1940 | error: | |
f73fabfd DG |
1941 | /* Return negative value to differentiate return code */ |
1942 | return -ret; | |
2f77fc4b DG |
1943 | } |
1944 | ||
1945 | ||
1946 | /* | |
1947 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
1948 | */ | |
1949 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
1950 | struct lttng_channel **channels) | |
1951 | { | |
1952 | int ret; | |
1953 | ssize_t nb_chan = 0; | |
1954 | ||
1955 | switch (domain) { | |
1956 | case LTTNG_DOMAIN_KERNEL: | |
1957 | if (session->kernel_session != NULL) { | |
1958 | nb_chan = session->kernel_session->channel_count; | |
1959 | } | |
1960 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
1961 | if (nb_chan <= 0) { |
1962 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
1963 | } | |
2f77fc4b DG |
1964 | break; |
1965 | case LTTNG_DOMAIN_UST: | |
1966 | if (session->ust_session != NULL) { | |
1967 | nb_chan = lttng_ht_get_count( | |
1968 | session->ust_session->domain_global.channels); | |
1969 | } | |
1970 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
1971 | if (nb_chan <= 0) { |
1972 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1973 | } | |
2f77fc4b DG |
1974 | break; |
1975 | default: | |
1976 | *channels = NULL; | |
f73fabfd | 1977 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1978 | goto error; |
1979 | } | |
1980 | ||
1981 | if (nb_chan > 0) { | |
1982 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
1983 | if (*channels == NULL) { | |
f73fabfd | 1984 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1985 | goto error; |
1986 | } | |
1987 | ||
1988 | list_lttng_channels(domain, session, *channels); | |
1989 | } else { | |
1990 | *channels = NULL; | |
c7d620a2 DG |
1991 | /* Ret value was set in the domain switch case */ |
1992 | goto error; | |
2f77fc4b DG |
1993 | } |
1994 | ||
1995 | return nb_chan; | |
1996 | ||
1997 | error: | |
f73fabfd DG |
1998 | /* Return negative value to differentiate return code */ |
1999 | return -ret; | |
2f77fc4b DG |
2000 | } |
2001 | ||
2002 | /* | |
2003 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2004 | */ | |
2005 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2006 | char *channel_name, struct lttng_event **events) | |
2007 | { | |
2008 | int ret = 0; | |
2009 | ssize_t nb_event = 0; | |
2010 | ||
2011 | switch (domain) { | |
2012 | case LTTNG_DOMAIN_KERNEL: | |
2013 | if (session->kernel_session != NULL) { | |
2014 | nb_event = list_lttng_kernel_events(channel_name, | |
2015 | session->kernel_session, events); | |
2016 | } | |
2017 | break; | |
2018 | case LTTNG_DOMAIN_UST: | |
2019 | { | |
2020 | if (session->ust_session != NULL) { | |
2021 | nb_event = list_lttng_ust_global_events(channel_name, | |
2022 | &session->ust_session->domain_global, events); | |
2023 | } | |
2024 | break; | |
2025 | } | |
2026 | default: | |
f73fabfd | 2027 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2028 | goto error; |
2029 | } | |
2030 | ||
f73fabfd | 2031 | return nb_event; |
2f77fc4b DG |
2032 | |
2033 | error: | |
f73fabfd DG |
2034 | /* Return negative value to differentiate return code */ |
2035 | return -ret; | |
2f77fc4b DG |
2036 | } |
2037 | ||
2038 | /* | |
2039 | * Using the session list, filled a lttng_session array to send back to the | |
2040 | * client for session listing. | |
2041 | * | |
2042 | * The session list lock MUST be acquired before calling this function. Use | |
2043 | * session_lock_list() and session_unlock_list(). | |
2044 | */ | |
2045 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2046 | gid_t gid) | |
2047 | { | |
2048 | int ret; | |
2049 | unsigned int i = 0; | |
2050 | struct ltt_session *session; | |
2051 | struct ltt_session_list *list = session_get_list(); | |
2052 | ||
2053 | DBG("Getting all available session for UID %d GID %d", | |
2054 | uid, gid); | |
2055 | /* | |
2056 | * Iterate over session list and append data after the control struct in | |
2057 | * the buffer. | |
2058 | */ | |
2059 | cds_list_for_each_entry(session, &list->head, list) { | |
2060 | /* | |
2061 | * Only list the sessions the user can control. | |
2062 | */ | |
2063 | if (!session_access_ok(session, uid, gid)) { | |
2064 | continue; | |
2065 | } | |
2066 | ||
2067 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2068 | struct ltt_ust_session *usess = session->ust_session; | |
2069 | ||
2070 | if (session->consumer->type == CONSUMER_DST_NET || | |
2071 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2072 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2073 | ret = build_network_session_path(sessions[i].path, | |
2074 | sizeof(session[i].path), session); | |
2075 | } else { | |
2076 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2077 | session->consumer->dst.trace_path); | |
2078 | } | |
2079 | if (ret < 0) { | |
2080 | PERROR("snprintf session path"); | |
2081 | continue; | |
2082 | } | |
2083 | ||
2084 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2085 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2086 | sessions[i].enabled = session->enabled; | |
2087 | i++; | |
2088 | } | |
2089 | } | |
2090 | ||
806e2684 | 2091 | /* |
6d805429 DG |
2092 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
2093 | * ready for trace analysis (or anykind of reader) or else 1 for pending data. | |
806e2684 | 2094 | */ |
6d805429 | 2095 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2096 | { |
2097 | int ret; | |
2098 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2099 | struct ltt_ust_session *usess = session->ust_session; | |
2100 | ||
2101 | assert(session); | |
2102 | ||
2103 | /* Session MUST be stopped to ask for data availability. */ | |
2104 | if (session->enabled) { | |
2105 | ret = LTTNG_ERR_SESSION_STARTED; | |
2106 | goto error; | |
2107 | } | |
2108 | ||
2109 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2110 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2111 | if (ret == 1) { | |
806e2684 DG |
2112 | /* Data is still being extracted for the kernel. */ |
2113 | goto error; | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | if (usess && usess->consumer) { | |
6d805429 DG |
2118 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2119 | if (ret == 1) { | |
806e2684 DG |
2120 | /* Data is still being extracted for the kernel. */ |
2121 | goto error; | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2126 | ret = 0; |
806e2684 DG |
2127 | |
2128 | error: | |
2129 | return ret; | |
2130 | } | |
2131 | ||
2f77fc4b DG |
2132 | /* |
2133 | * Init command subsystem. | |
2134 | */ | |
2135 | void cmd_init(void) | |
2136 | { | |
2137 | /* | |
d88aee68 DG |
2138 | * Set network sequence index to 1 for streams to match a relayd |
2139 | * socket on the consumer side. | |
2f77fc4b | 2140 | */ |
d88aee68 DG |
2141 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
2142 | relayd_net_seq_idx = 1; | |
2143 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
2144 | |
2145 | DBG("Command subsystem initialized"); | |
2146 | } |