Commit | Line | Data |
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2f77fc4b DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
20 | #include <urcu/list.h> | |
21 | #include <urcu/uatomic.h> | |
22 | ||
23 | #include <common/defaults.h> | |
24 | #include <common/common.h> | |
25 | #include <common/sessiond-comm/sessiond-comm.h> | |
26 | #include <common/relayd/relayd.h> | |
27 | ||
28 | #include "channel.h" | |
29 | #include "consumer.h" | |
30 | #include "event.h" | |
7972aab2 | 31 | #include "health.h" |
2f77fc4b DG |
32 | #include "kernel.h" |
33 | #include "kernel-consumer.h" | |
34 | #include "lttng-sessiond.h" | |
35 | #include "utils.h" | |
36 | ||
37 | #include "cmd.h" | |
38 | ||
39 | /* | |
40 | * Used to keep a unique index for each relayd socket created where this value | |
41 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
42 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
43 | * held. | |
2f77fc4b | 44 | */ |
d88aee68 DG |
45 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
46 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b DG |
47 | |
48 | /* | |
49 | * Create a session path used by list_lttng_sessions for the case that the | |
50 | * session consumer is on the network. | |
51 | */ | |
52 | static int build_network_session_path(char *dst, size_t size, | |
53 | struct ltt_session *session) | |
54 | { | |
55 | int ret, kdata_port, udata_port; | |
56 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
57 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
58 | ||
59 | assert(session); | |
60 | assert(dst); | |
61 | ||
62 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
63 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
64 | ||
65 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
66 | ||
67 | if (session->kernel_session && session->kernel_session->consumer) { | |
68 | kuri = &session->kernel_session->consumer->dst.net.control; | |
69 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
70 | } | |
71 | ||
72 | if (session->ust_session && session->ust_session->consumer) { | |
73 | uuri = &session->ust_session->consumer->dst.net.control; | |
74 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
75 | } | |
76 | ||
77 | if (uuri == NULL && kuri == NULL) { | |
78 | uri = &session->consumer->dst.net.control; | |
79 | kdata_port = session->consumer->dst.net.data.port; | |
80 | } else if (kuri && uuri) { | |
81 | ret = uri_compare(kuri, uuri); | |
82 | if (ret) { | |
83 | /* Not Equal */ | |
84 | uri = kuri; | |
85 | /* Build uuri URL string */ | |
86 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
87 | if (ret < 0) { | |
88 | goto error; | |
89 | } | |
90 | } else { | |
91 | uri = kuri; | |
92 | } | |
93 | } else if (kuri && uuri == NULL) { | |
94 | uri = kuri; | |
95 | } else if (uuri && kuri == NULL) { | |
96 | uri = uuri; | |
97 | } | |
98 | ||
99 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
100 | if (ret < 0) { | |
101 | goto error; | |
102 | } | |
103 | ||
9aa9f900 DG |
104 | /* |
105 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
106 | * to print. | |
107 | */ | |
9d035200 | 108 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
109 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
110 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
111 | } else { | |
9aa9f900 DG |
112 | int dport; |
113 | if (kuri) { | |
114 | dport = kdata_port; | |
115 | } else { | |
116 | /* No kernel URI, use the UST port. */ | |
117 | dport = udata_port; | |
118 | } | |
119 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
120 | } |
121 | ||
122 | error: | |
123 | return ret; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Fill lttng_channel array of all channels. | |
128 | */ | |
129 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
130 | struct lttng_channel *channels) | |
131 | { | |
132 | int i = 0; | |
133 | struct ltt_kernel_channel *kchan; | |
134 | ||
135 | DBG("Listing channels for session %s", session->name); | |
136 | ||
137 | switch (domain) { | |
138 | case LTTNG_DOMAIN_KERNEL: | |
139 | /* Kernel channels */ | |
140 | if (session->kernel_session != NULL) { | |
141 | cds_list_for_each_entry(kchan, | |
142 | &session->kernel_session->channel_list.head, list) { | |
143 | /* Copy lttng_channel struct to array */ | |
144 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
145 | channels[i].enabled = kchan->enabled; | |
146 | i++; | |
147 | } | |
148 | } | |
149 | break; | |
150 | case LTTNG_DOMAIN_UST: | |
151 | { | |
152 | struct lttng_ht_iter iter; | |
153 | struct ltt_ust_channel *uchan; | |
154 | ||
e7fe706f | 155 | rcu_read_lock(); |
2f77fc4b DG |
156 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
157 | &iter.iter, uchan, node.node) { | |
158 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
159 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
160 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
161 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
162 | channels[i].attr.switch_timer_interval = | |
163 | uchan->attr.switch_timer_interval; | |
164 | channels[i].attr.read_timer_interval = | |
165 | uchan->attr.read_timer_interval; | |
166 | channels[i].enabled = uchan->enabled; | |
167 | switch (uchan->attr.output) { | |
168 | case LTTNG_UST_MMAP: | |
169 | default: | |
170 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
171 | break; | |
172 | } | |
173 | i++; | |
174 | } | |
e7fe706f | 175 | rcu_read_unlock(); |
2f77fc4b DG |
176 | break; |
177 | } | |
178 | default: | |
179 | break; | |
180 | } | |
181 | } | |
182 | ||
183 | /* | |
184 | * Create a list of ust global domain events. | |
185 | */ | |
186 | static int list_lttng_ust_global_events(char *channel_name, | |
187 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
188 | { | |
189 | int i = 0, ret = 0; | |
190 | unsigned int nb_event = 0; | |
191 | struct lttng_ht_iter iter; | |
192 | struct lttng_ht_node_str *node; | |
193 | struct ltt_ust_channel *uchan; | |
194 | struct ltt_ust_event *uevent; | |
195 | struct lttng_event *tmp; | |
196 | ||
197 | DBG("Listing UST global events for channel %s", channel_name); | |
198 | ||
199 | rcu_read_lock(); | |
200 | ||
201 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
202 | node = lttng_ht_iter_get_node_str(&iter); | |
203 | if (node == NULL) { | |
f73fabfd | 204 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
205 | goto error; |
206 | } | |
207 | ||
208 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
209 | ||
210 | nb_event += lttng_ht_get_count(uchan->events); | |
211 | ||
212 | if (nb_event == 0) { | |
213 | ret = nb_event; | |
214 | goto error; | |
215 | } | |
216 | ||
217 | DBG3("Listing UST global %d events", nb_event); | |
218 | ||
219 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
220 | if (tmp == NULL) { | |
f73fabfd | 221 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
222 | goto error; |
223 | } | |
224 | ||
225 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
226 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
227 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
228 | tmp[i].enabled = uevent->enabled; | |
229 | ||
230 | switch (uevent->attr.instrumentation) { | |
231 | case LTTNG_UST_TRACEPOINT: | |
232 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
233 | break; | |
234 | case LTTNG_UST_PROBE: | |
235 | tmp[i].type = LTTNG_EVENT_PROBE; | |
236 | break; | |
237 | case LTTNG_UST_FUNCTION: | |
238 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
239 | break; | |
240 | } | |
241 | ||
242 | tmp[i].loglevel = uevent->attr.loglevel; | |
243 | switch (uevent->attr.loglevel_type) { | |
244 | case LTTNG_UST_LOGLEVEL_ALL: | |
245 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
246 | break; | |
247 | case LTTNG_UST_LOGLEVEL_RANGE: | |
248 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
249 | break; | |
250 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
251 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
252 | break; | |
253 | } | |
254 | if (uevent->filter) { | |
255 | tmp[i].filter = 1; | |
256 | } | |
257 | i++; | |
258 | } | |
259 | ||
260 | ret = nb_event; | |
261 | *events = tmp; | |
262 | ||
263 | error: | |
264 | rcu_read_unlock(); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | /* | |
269 | * Fill lttng_event array of all kernel events in the channel. | |
270 | */ | |
271 | static int list_lttng_kernel_events(char *channel_name, | |
272 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
273 | { | |
274 | int i = 0, ret; | |
275 | unsigned int nb_event; | |
276 | struct ltt_kernel_event *event; | |
277 | struct ltt_kernel_channel *kchan; | |
278 | ||
279 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
280 | if (kchan == NULL) { | |
f73fabfd | 281 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
282 | goto error; |
283 | } | |
284 | ||
285 | nb_event = kchan->event_count; | |
286 | ||
287 | DBG("Listing events for channel %s", kchan->channel->name); | |
288 | ||
289 | if (nb_event == 0) { | |
f73fabfd | 290 | goto end; |
2f77fc4b DG |
291 | } |
292 | ||
293 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
294 | if (*events == NULL) { | |
f73fabfd | 295 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
296 | goto error; |
297 | } | |
298 | ||
299 | /* Kernel channels */ | |
300 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
301 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
302 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
303 | (*events)[i].enabled = event->enabled; | |
304 | ||
305 | switch (event->event->instrumentation) { | |
306 | case LTTNG_KERNEL_TRACEPOINT: | |
307 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
308 | break; | |
309 | case LTTNG_KERNEL_KPROBE: | |
310 | case LTTNG_KERNEL_KRETPROBE: | |
311 | (*events)[i].type = LTTNG_EVENT_PROBE; | |
312 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
313 | sizeof(struct lttng_kernel_kprobe)); | |
314 | break; | |
315 | case LTTNG_KERNEL_FUNCTION: | |
316 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
317 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
318 | sizeof(struct lttng_kernel_function)); | |
319 | break; | |
320 | case LTTNG_KERNEL_NOOP: | |
321 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
322 | break; | |
323 | case LTTNG_KERNEL_SYSCALL: | |
324 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
325 | break; | |
326 | case LTTNG_KERNEL_ALL: | |
327 | assert(0); | |
328 | break; | |
329 | } | |
330 | i++; | |
331 | } | |
332 | ||
f73fabfd | 333 | end: |
2f77fc4b DG |
334 | return nb_event; |
335 | ||
336 | error: | |
f73fabfd DG |
337 | /* Negate the error code to differentiate the size from an error */ |
338 | return -ret; | |
2f77fc4b DG |
339 | } |
340 | ||
341 | /* | |
342 | * Add URI so the consumer output object. Set the correct path depending on the | |
343 | * domain adding the default trace directory. | |
344 | */ | |
345 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
346 | struct lttng_uri *uri, int domain, const char *session_name) | |
347 | { | |
f73fabfd | 348 | int ret = LTTNG_OK; |
2f77fc4b DG |
349 | const char *default_trace_dir; |
350 | ||
351 | assert(uri); | |
352 | ||
353 | if (consumer == NULL) { | |
354 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 355 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
356 | goto error; |
357 | } | |
358 | ||
359 | switch (domain) { | |
360 | case LTTNG_DOMAIN_KERNEL: | |
361 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
362 | break; | |
363 | case LTTNG_DOMAIN_UST: | |
364 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
365 | break; | |
366 | default: | |
367 | /* | |
368 | * This case is possible is we try to add the URI to the global tracing | |
369 | * session consumer object which in this case there is no subdir. | |
370 | */ | |
371 | default_trace_dir = ""; | |
372 | } | |
373 | ||
374 | switch (uri->dtype) { | |
375 | case LTTNG_DST_IPV4: | |
376 | case LTTNG_DST_IPV6: | |
377 | DBG2("Setting network URI to consumer"); | |
378 | ||
ffe60014 DG |
379 | consumer->type = CONSUMER_DST_NET; |
380 | ||
785d2d0d DG |
381 | if ((uri->stype == LTTNG_STREAM_CONTROL && |
382 | consumer->dst.net.control_isset) || | |
383 | (uri->stype == LTTNG_STREAM_DATA && | |
384 | consumer->dst.net.data_isset)) { | |
385 | ret = LTTNG_ERR_URL_EXIST; | |
386 | goto error; | |
387 | } | |
388 | ||
2f77fc4b DG |
389 | /* Set URI into consumer output object */ |
390 | ret = consumer_set_network_uri(consumer, uri); | |
391 | if (ret < 0) { | |
f73fabfd | 392 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
393 | goto error; |
394 | } else if (ret == 1) { | |
395 | /* | |
396 | * URI was the same in the consumer so we do not append the subdir | |
397 | * again so to not duplicate output dir. | |
398 | */ | |
399 | goto error; | |
400 | } | |
401 | ||
402 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
403 | ret = consumer_set_subdir(consumer, session_name); | |
404 | if (ret < 0) { | |
f73fabfd | 405 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
406 | goto error; |
407 | } | |
408 | } | |
409 | ||
410 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
411 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
412 | strncat(consumer->subdir, default_trace_dir, |
413 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
414 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
415 | } | |
416 | ||
417 | break; | |
418 | case LTTNG_DST_PATH: | |
419 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
420 | memset(consumer->dst.trace_path, 0, | |
421 | sizeof(consumer->dst.trace_path)); | |
422 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
423 | sizeof(consumer->dst.trace_path)); | |
424 | /* Append default trace dir */ | |
425 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
426 | sizeof(consumer->dst.trace_path) - |
427 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
428 | /* Flag consumer as local. */ |
429 | consumer->type = CONSUMER_DST_LOCAL; | |
430 | break; | |
431 | } | |
432 | ||
433 | error: | |
434 | return ret; | |
435 | } | |
436 | ||
437 | /* | |
438 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
439 | */ | |
440 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
441 | { | |
442 | int ret = 0; | |
443 | struct lttng_ht_iter iter; | |
444 | struct consumer_socket *socket; | |
445 | ||
446 | assert(session); | |
447 | ||
e7fe706f DG |
448 | rcu_read_lock(); |
449 | ||
2f77fc4b DG |
450 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
451 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
452 | socket, node.node) { | |
453 | /* Code flow error */ | |
454 | assert(socket->fd >= 0); | |
455 | ||
456 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 457 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
458 | pthread_mutex_unlock(socket->lock); |
459 | if (ret < 0) { | |
f73fabfd | 460 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
461 | goto error; |
462 | } | |
463 | } | |
464 | } | |
465 | ||
466 | error: | |
e7fe706f | 467 | rcu_read_unlock(); |
2f77fc4b DG |
468 | return ret; |
469 | } | |
470 | ||
471 | /* | |
472 | * Create a socket to the relayd using the URI. | |
473 | * | |
474 | * On success, the relayd_sock pointer is set to the created socket. | |
475 | * Else, it's stays untouched and a lttcomm error code is returned. | |
476 | */ | |
477 | static int create_connect_relayd(struct consumer_output *output, | |
478 | const char *session_name, struct lttng_uri *uri, | |
479 | struct lttcomm_sock **relayd_sock) | |
480 | { | |
481 | int ret; | |
482 | struct lttcomm_sock *sock; | |
483 | ||
484 | /* Create socket object from URI */ | |
485 | sock = lttcomm_alloc_sock_from_uri(uri); | |
486 | if (sock == NULL) { | |
f73fabfd | 487 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
488 | goto error; |
489 | } | |
490 | ||
491 | ret = lttcomm_create_sock(sock); | |
492 | if (ret < 0) { | |
f73fabfd | 493 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
494 | goto error; |
495 | } | |
496 | ||
ffe60014 DG |
497 | /* |
498 | * Connect to relayd so we can proceed with a session creation. This call | |
499 | * can possibly block for an arbitrary amount of time to set the health | |
500 | * state to be in poll execution. | |
501 | */ | |
502 | health_poll_entry(); | |
2f77fc4b | 503 | ret = relayd_connect(sock); |
ffe60014 | 504 | health_poll_exit(); |
2f77fc4b DG |
505 | if (ret < 0) { |
506 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 507 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
508 | goto free_sock; |
509 | } | |
510 | ||
511 | /* Create socket for control stream. */ | |
512 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
513 | DBG3("Creating relayd stream socket from URI"); | |
514 | ||
515 | /* Check relayd version */ | |
516 | ret = relayd_version_check(sock, RELAYD_VERSION_COMM_MAJOR, | |
517 | RELAYD_VERSION_COMM_MINOR); | |
518 | if (ret < 0) { | |
f73fabfd | 519 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
520 | goto close_sock; |
521 | } | |
522 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
523 | DBG3("Creating relayd data socket from URI"); | |
524 | } else { | |
525 | /* Command is not valid */ | |
526 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 527 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
528 | goto close_sock; |
529 | } | |
530 | ||
531 | *relayd_sock = sock; | |
532 | ||
f73fabfd | 533 | return LTTNG_OK; |
2f77fc4b DG |
534 | |
535 | close_sock: | |
536 | if (sock) { | |
537 | (void) relayd_close(sock); | |
538 | } | |
539 | free_sock: | |
540 | if (sock) { | |
541 | lttcomm_destroy_sock(sock); | |
542 | } | |
543 | error: | |
544 | return ret; | |
545 | } | |
546 | ||
547 | /* | |
548 | * Connect to the relayd using URI and send the socket to the right consumer. | |
549 | */ | |
550 | static int send_consumer_relayd_socket(int domain, struct ltt_session *session, | |
551 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, | |
f50f23d9 | 552 | struct consumer_socket *consumer_sock) |
2f77fc4b DG |
553 | { |
554 | int ret; | |
555 | struct lttcomm_sock *sock = NULL; | |
556 | ||
ffe60014 DG |
557 | /* Connect to relayd and make version check if uri is the control. */ |
558 | ret = create_connect_relayd(consumer, session->name, relayd_uri, &sock); | |
559 | if (ret != LTTNG_OK) { | |
560 | goto close_sock; | |
561 | } | |
562 | ||
563 | /* If the control socket is connected, network session is ready */ | |
564 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
565 | session->net_handle = 1; | |
566 | } | |
567 | ||
2f77fc4b | 568 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
569 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
570 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
571 | /* |
572 | * Increment net_seq_idx because we are about to transfer the | |
573 | * new relayd socket to the consumer. | |
d88aee68 | 574 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 575 | */ |
d88aee68 DG |
576 | consumer->net_seq_index = ++relayd_net_seq_idx; |
577 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
578 | } |
579 | ||
2f77fc4b | 580 | /* Send relayd socket to consumer. */ |
f50f23d9 | 581 | ret = consumer_send_relayd_socket(consumer_sock, sock, |
46e6455f | 582 | consumer, relayd_uri->stype, session->id); |
2f77fc4b | 583 | if (ret < 0) { |
f73fabfd | 584 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
585 | goto close_sock; |
586 | } | |
587 | ||
c890b720 DG |
588 | /* Flag that the corresponding socket was sent. */ |
589 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 590 | consumer_sock->control_sock_sent = 1; |
c890b720 | 591 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 592 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
593 | } |
594 | ||
f73fabfd | 595 | ret = LTTNG_OK; |
2f77fc4b DG |
596 | |
597 | /* | |
598 | * Close socket which was dup on the consumer side. The session daemon does | |
599 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
600 | */ | |
601 | ||
602 | close_sock: | |
603 | if (sock) { | |
604 | (void) relayd_close(sock); | |
605 | lttcomm_destroy_sock(sock); | |
606 | } | |
607 | ||
ffe60014 DG |
608 | if (ret != LTTNG_OK) { |
609 | /* | |
610 | * On error, nullify the consumer sequence index so streams are not | |
611 | * associated with it once sent to the consumer. | |
612 | */ | |
613 | uatomic_set(&consumer->net_seq_index, -1); | |
614 | } | |
615 | ||
2f77fc4b DG |
616 | return ret; |
617 | } | |
618 | ||
619 | /* | |
620 | * Send both relayd sockets to a specific consumer and domain. This is a | |
621 | * helper function to facilitate sending the information to the consumer for a | |
622 | * session. | |
623 | */ | |
624 | static int send_consumer_relayd_sockets(int domain, | |
f50f23d9 DG |
625 | struct ltt_session *session, struct consumer_output *consumer, |
626 | struct consumer_socket *sock) | |
2f77fc4b | 627 | { |
dda67f6c | 628 | int ret = LTTNG_OK; |
2f77fc4b DG |
629 | |
630 | assert(session); | |
631 | assert(consumer); | |
632 | ||
2f77fc4b | 633 | /* Sending control relayd socket. */ |
ffe60014 | 634 | if (!sock->control_sock_sent) { |
c890b720 | 635 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 636 | &consumer->dst.net.control, consumer, sock); |
c890b720 DG |
637 | if (ret != LTTNG_OK) { |
638 | goto error; | |
639 | } | |
2f77fc4b DG |
640 | } |
641 | ||
642 | /* Sending data relayd socket. */ | |
ffe60014 | 643 | if (!sock->data_sock_sent) { |
c890b720 | 644 | ret = send_consumer_relayd_socket(domain, session, |
f50f23d9 | 645 | &consumer->dst.net.data, consumer, sock); |
c890b720 DG |
646 | if (ret != LTTNG_OK) { |
647 | goto error; | |
648 | } | |
2f77fc4b DG |
649 | } |
650 | ||
2f77fc4b DG |
651 | error: |
652 | return ret; | |
653 | } | |
654 | ||
655 | /* | |
656 | * Setup relayd connections for a tracing session. First creates the socket to | |
657 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
658 | * network. | |
659 | */ | |
ffe60014 | 660 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 661 | { |
f73fabfd | 662 | int ret = LTTNG_OK; |
2f77fc4b DG |
663 | struct ltt_ust_session *usess; |
664 | struct ltt_kernel_session *ksess; | |
665 | struct consumer_socket *socket; | |
666 | struct lttng_ht_iter iter; | |
667 | ||
668 | assert(session); | |
669 | ||
670 | usess = session->ust_session; | |
671 | ksess = session->kernel_session; | |
672 | ||
785d2d0d | 673 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 674 | |
e7fe706f DG |
675 | rcu_read_lock(); |
676 | ||
2f77fc4b DG |
677 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
678 | && usess->consumer->enabled) { | |
679 | /* For each consumer socket, send relayd sockets */ | |
680 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
681 | socket, node.node) { | |
682 | /* Code flow error */ | |
683 | assert(socket->fd >= 0); | |
684 | ||
685 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 686 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session, |
f50f23d9 | 687 | usess->consumer, socket); |
2f77fc4b | 688 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 689 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
690 | goto error; |
691 | } | |
692 | } | |
693 | } | |
694 | ||
695 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
696 | && ksess->consumer->enabled) { | |
697 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
698 | socket, node.node) { | |
699 | /* Code flow error */ | |
700 | assert(socket->fd >= 0); | |
701 | ||
702 | pthread_mutex_lock(socket->lock); | |
dda67f6c | 703 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session, |
f50f23d9 | 704 | ksess->consumer, socket); |
2f77fc4b | 705 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 706 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
707 | goto error; |
708 | } | |
709 | } | |
710 | } | |
711 | ||
712 | error: | |
e7fe706f | 713 | rcu_read_unlock(); |
2f77fc4b DG |
714 | return ret; |
715 | } | |
716 | ||
9b6c7ec5 DG |
717 | /* |
718 | * Start a kernel session by opening all necessary streams. | |
719 | */ | |
720 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
721 | { | |
722 | int ret; | |
723 | struct ltt_kernel_channel *kchan; | |
724 | ||
725 | /* Open kernel metadata */ | |
726 | if (ksess->metadata == NULL) { | |
727 | ret = kernel_open_metadata(ksess); | |
728 | if (ret < 0) { | |
729 | ret = LTTNG_ERR_KERN_META_FAIL; | |
730 | goto error; | |
731 | } | |
732 | } | |
733 | ||
734 | /* Open kernel metadata stream */ | |
735 | if (ksess->metadata_stream_fd < 0) { | |
736 | ret = kernel_open_metadata_stream(ksess); | |
737 | if (ret < 0) { | |
738 | ERR("Kernel create metadata stream failed"); | |
739 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
740 | goto error; | |
741 | } | |
742 | } | |
743 | ||
744 | /* For each channel */ | |
745 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
746 | if (kchan->stream_count == 0) { | |
747 | ret = kernel_open_channel_stream(kchan); | |
748 | if (ret < 0) { | |
749 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
750 | goto error; | |
751 | } | |
752 | /* Update the stream global counter */ | |
753 | ksess->stream_count_global += ret; | |
754 | } | |
755 | } | |
756 | ||
757 | /* Setup kernel consumer socket and send fds to it */ | |
758 | ret = init_kernel_tracing(ksess); | |
759 | if (ret < 0) { | |
760 | ret = LTTNG_ERR_KERN_START_FAIL; | |
761 | goto error; | |
762 | } | |
763 | ||
764 | /* This start the kernel tracing */ | |
765 | ret = kernel_start_session(ksess); | |
766 | if (ret < 0) { | |
767 | ret = LTTNG_ERR_KERN_START_FAIL; | |
768 | goto error; | |
769 | } | |
770 | ||
771 | /* Quiescent wait after starting trace */ | |
784303b0 | 772 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
773 | |
774 | ksess->started = 1; | |
775 | ||
776 | ret = LTTNG_OK; | |
777 | ||
778 | error: | |
779 | return ret; | |
780 | } | |
781 | ||
2f77fc4b DG |
782 | /* |
783 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
784 | */ | |
785 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
786 | char *channel_name) | |
787 | { | |
788 | int ret; | |
789 | struct ltt_ust_session *usess; | |
790 | ||
791 | usess = session->ust_session; | |
792 | ||
2223c96f DG |
793 | rcu_read_lock(); |
794 | ||
2f77fc4b DG |
795 | switch (domain) { |
796 | case LTTNG_DOMAIN_KERNEL: | |
797 | { | |
798 | ret = channel_kernel_disable(session->kernel_session, | |
799 | channel_name); | |
f73fabfd | 800 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
801 | goto error; |
802 | } | |
803 | ||
804 | kernel_wait_quiescent(kernel_tracer_fd); | |
805 | break; | |
806 | } | |
807 | case LTTNG_DOMAIN_UST: | |
808 | { | |
809 | struct ltt_ust_channel *uchan; | |
810 | struct lttng_ht *chan_ht; | |
811 | ||
812 | chan_ht = usess->domain_global.channels; | |
813 | ||
814 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
815 | if (uchan == NULL) { | |
f73fabfd | 816 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
817 | goto error; |
818 | } | |
819 | ||
7972aab2 | 820 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 821 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
822 | goto error; |
823 | } | |
824 | break; | |
825 | } | |
826 | #if 0 | |
827 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
828 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
829 | case LTTNG_DOMAIN_UST_PID: | |
830 | #endif | |
831 | default: | |
f73fabfd | 832 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
833 | goto error; |
834 | } | |
835 | ||
f73fabfd | 836 | ret = LTTNG_OK; |
2f77fc4b DG |
837 | |
838 | error: | |
2223c96f | 839 | rcu_read_unlock(); |
2f77fc4b DG |
840 | return ret; |
841 | } | |
842 | ||
843 | /* | |
844 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
845 | * | |
846 | * The wpipe arguments is used as a notifier for the kernel thread. | |
847 | */ | |
848 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 849 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
850 | { |
851 | int ret; | |
852 | struct ltt_ust_session *usess = session->ust_session; | |
853 | struct lttng_ht *chan_ht; | |
854 | ||
855 | assert(session); | |
856 | assert(attr); | |
7972aab2 | 857 | assert(domain); |
2f77fc4b DG |
858 | |
859 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
860 | ||
2223c96f DG |
861 | rcu_read_lock(); |
862 | ||
7972aab2 | 863 | switch (domain->type) { |
2f77fc4b DG |
864 | case LTTNG_DOMAIN_KERNEL: |
865 | { | |
866 | struct ltt_kernel_channel *kchan; | |
867 | ||
2f77fc4b DG |
868 | kchan = trace_kernel_get_channel_by_name(attr->name, |
869 | session->kernel_session); | |
870 | if (kchan == NULL) { | |
871 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
872 | } else { | |
873 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
874 | } | |
875 | ||
f73fabfd | 876 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
877 | goto error; |
878 | } | |
879 | ||
784303b0 | 880 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 DG |
881 | |
882 | /* | |
883 | * If the session was previously started, start as well this newly | |
884 | * created kernel session so the events/channels enabled *after* the | |
885 | * start actually work. | |
886 | */ | |
887 | if (session->started && !session->kernel_session->started) { | |
888 | ret = start_kernel_session(session->kernel_session, wpipe); | |
889 | if (ret != LTTNG_OK) { | |
890 | goto error; | |
891 | } | |
892 | } | |
2f77fc4b DG |
893 | break; |
894 | } | |
895 | case LTTNG_DOMAIN_UST: | |
896 | { | |
897 | struct ltt_ust_channel *uchan; | |
898 | ||
899 | chan_ht = usess->domain_global.channels; | |
900 | ||
901 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
902 | if (uchan == NULL) { | |
7972aab2 | 903 | ret = channel_ust_create(usess, attr, domain->buf_type); |
2f77fc4b | 904 | } else { |
7972aab2 | 905 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b | 906 | } |
9b6c7ec5 DG |
907 | |
908 | /* Start the UST session if the session was already started. */ | |
909 | if (session->started && !usess->start_trace) { | |
910 | ret = ust_app_start_trace_all(usess); | |
911 | if (ret < 0) { | |
912 | ret = LTTNG_ERR_UST_START_FAIL; | |
913 | goto error; | |
914 | } | |
915 | ret = LTTNG_OK; | |
916 | usess->start_trace = 1; | |
917 | } | |
2f77fc4b DG |
918 | break; |
919 | } | |
2f77fc4b | 920 | default: |
f73fabfd | 921 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
922 | goto error; |
923 | } | |
924 | ||
925 | error: | |
2223c96f | 926 | rcu_read_unlock(); |
2f77fc4b DG |
927 | return ret; |
928 | } | |
929 | ||
930 | ||
931 | /* | |
932 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
933 | */ | |
934 | int cmd_disable_event(struct ltt_session *session, int domain, | |
935 | char *channel_name, char *event_name) | |
936 | { | |
937 | int ret; | |
938 | ||
2223c96f DG |
939 | rcu_read_lock(); |
940 | ||
2f77fc4b DG |
941 | switch (domain) { |
942 | case LTTNG_DOMAIN_KERNEL: | |
943 | { | |
944 | struct ltt_kernel_channel *kchan; | |
945 | struct ltt_kernel_session *ksess; | |
946 | ||
947 | ksess = session->kernel_session; | |
948 | ||
949 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
950 | if (kchan == NULL) { | |
f73fabfd | 951 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
952 | goto error; |
953 | } | |
954 | ||
d3a56674 | 955 | ret = event_kernel_disable_tracepoint(kchan, event_name); |
f73fabfd | 956 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
957 | goto error; |
958 | } | |
959 | ||
960 | kernel_wait_quiescent(kernel_tracer_fd); | |
961 | break; | |
962 | } | |
963 | case LTTNG_DOMAIN_UST: | |
964 | { | |
965 | struct ltt_ust_channel *uchan; | |
966 | struct ltt_ust_session *usess; | |
967 | ||
968 | usess = session->ust_session; | |
969 | ||
970 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
971 | channel_name); | |
972 | if (uchan == NULL) { | |
f73fabfd | 973 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
974 | goto error; |
975 | } | |
976 | ||
7972aab2 | 977 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
f73fabfd | 978 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
979 | goto error; |
980 | } | |
981 | ||
982 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
983 | channel_name); | |
984 | break; | |
985 | } | |
986 | #if 0 | |
987 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
988 | case LTTNG_DOMAIN_UST_PID: | |
989 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
990 | #endif | |
991 | default: | |
f73fabfd | 992 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
993 | goto error; |
994 | } | |
995 | ||
f73fabfd | 996 | ret = LTTNG_OK; |
2f77fc4b DG |
997 | |
998 | error: | |
2223c96f | 999 | rcu_read_unlock(); |
2f77fc4b DG |
1000 | return ret; |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
1005 | */ | |
1006 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
1007 | char *channel_name) | |
1008 | { | |
1009 | int ret; | |
1010 | ||
2223c96f DG |
1011 | rcu_read_lock(); |
1012 | ||
2f77fc4b DG |
1013 | switch (domain) { |
1014 | case LTTNG_DOMAIN_KERNEL: | |
1015 | { | |
1016 | struct ltt_kernel_session *ksess; | |
1017 | struct ltt_kernel_channel *kchan; | |
1018 | ||
1019 | ksess = session->kernel_session; | |
1020 | ||
1021 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
1022 | if (kchan == NULL) { | |
f73fabfd | 1023 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1024 | goto error; |
1025 | } | |
1026 | ||
d3a56674 | 1027 | ret = event_kernel_disable_all(kchan); |
f73fabfd | 1028 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1029 | goto error; |
1030 | } | |
1031 | ||
1032 | kernel_wait_quiescent(kernel_tracer_fd); | |
1033 | break; | |
1034 | } | |
1035 | case LTTNG_DOMAIN_UST: | |
1036 | { | |
1037 | struct ltt_ust_session *usess; | |
1038 | struct ltt_ust_channel *uchan; | |
1039 | ||
1040 | usess = session->ust_session; | |
1041 | ||
1042 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1043 | channel_name); | |
1044 | if (uchan == NULL) { | |
f73fabfd | 1045 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1046 | goto error; |
1047 | } | |
1048 | ||
7972aab2 | 1049 | ret = event_ust_disable_all_tracepoints(usess, uchan); |
2f77fc4b DG |
1050 | if (ret != 0) { |
1051 | goto error; | |
1052 | } | |
1053 | ||
1054 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1055 | ||
1056 | break; | |
1057 | } | |
1058 | #if 0 | |
1059 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1060 | case LTTNG_DOMAIN_UST_PID: | |
1061 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1062 | #endif | |
1063 | default: | |
f73fabfd | 1064 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1065 | goto error; |
1066 | } | |
1067 | ||
f73fabfd | 1068 | ret = LTTNG_OK; |
2f77fc4b DG |
1069 | |
1070 | error: | |
2223c96f | 1071 | rcu_read_unlock(); |
2f77fc4b DG |
1072 | return ret; |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1077 | */ | |
1078 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1079 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b DG |
1080 | { |
1081 | int ret; | |
1082 | ||
1083 | switch (domain) { | |
1084 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1085 | assert(session->kernel_session); |
1086 | ||
1087 | if (session->kernel_session->channel_count == 0) { | |
1088 | /* Create default channel */ | |
1089 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1090 | if (ret != LTTNG_OK) { | |
1091 | goto error; | |
1092 | } | |
1093 | } | |
1094 | ||
2f77fc4b | 1095 | /* Add kernel context to kernel tracer */ |
601d5acf | 1096 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1097 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1098 | goto error; |
1099 | } | |
1100 | break; | |
1101 | case LTTNG_DOMAIN_UST: | |
1102 | { | |
1103 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
1104 | assert(usess); |
1105 | ||
979e618e DG |
1106 | unsigned int chan_count = |
1107 | lttng_ht_get_count(usess->domain_global.channels); | |
1108 | if (chan_count == 0) { | |
1109 | struct lttng_channel *attr; | |
1110 | /* Create default channel */ | |
1111 | attr = channel_new_default_attr(domain); | |
1112 | if (attr == NULL) { | |
1113 | ret = LTTNG_ERR_FATAL; | |
1114 | goto error; | |
1115 | } | |
1116 | ||
7972aab2 | 1117 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1118 | if (ret != LTTNG_OK) { |
1119 | free(attr); | |
1120 | goto error; | |
1121 | } | |
1122 | free(attr); | |
1123 | } | |
1124 | ||
601d5acf | 1125 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1126 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1127 | goto error; |
1128 | } | |
1129 | break; | |
1130 | } | |
1131 | #if 0 | |
1132 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1133 | case LTTNG_DOMAIN_UST_PID: | |
1134 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1135 | #endif | |
1136 | default: | |
f73fabfd | 1137 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1138 | goto error; |
1139 | } | |
1140 | ||
f73fabfd | 1141 | ret = LTTNG_OK; |
2f77fc4b DG |
1142 | |
1143 | error: | |
1144 | return ret; | |
1145 | } | |
1146 | ||
2f77fc4b DG |
1147 | /* |
1148 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1149 | */ | |
7972aab2 | 1150 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 DG |
1151 | char *channel_name, struct lttng_event *event, |
1152 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b | 1153 | { |
e5f5db7f | 1154 | int ret, channel_created = 0; |
2f77fc4b DG |
1155 | struct lttng_channel *attr; |
1156 | ||
1157 | assert(session); | |
1158 | assert(event); | |
1159 | assert(channel_name); | |
1160 | ||
2223c96f DG |
1161 | rcu_read_lock(); |
1162 | ||
7972aab2 | 1163 | switch (domain->type) { |
2f77fc4b DG |
1164 | case LTTNG_DOMAIN_KERNEL: |
1165 | { | |
1166 | struct ltt_kernel_channel *kchan; | |
1167 | ||
1168 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1169 | session->kernel_session); | |
1170 | if (kchan == NULL) { | |
7972aab2 | 1171 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL); |
2f77fc4b | 1172 | if (attr == NULL) { |
f73fabfd | 1173 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1174 | goto error; |
1175 | } | |
1176 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1177 | ||
1178 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1179 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1180 | free(attr); |
1181 | goto error; | |
1182 | } | |
1183 | free(attr); | |
e5f5db7f DG |
1184 | |
1185 | channel_created = 1; | |
2f77fc4b DG |
1186 | } |
1187 | ||
1188 | /* Get the newly created kernel channel pointer */ | |
1189 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1190 | session->kernel_session); | |
1191 | if (kchan == NULL) { | |
1192 | /* This sould not happen... */ | |
f73fabfd | 1193 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1194 | goto error; |
1195 | } | |
1196 | ||
d3a56674 | 1197 | ret = event_kernel_enable_tracepoint(kchan, event); |
f73fabfd | 1198 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1199 | if (channel_created) { |
1200 | /* Let's not leak a useless channel. */ | |
1201 | kernel_destroy_channel(kchan); | |
1202 | } | |
2f77fc4b DG |
1203 | goto error; |
1204 | } | |
1205 | ||
1206 | kernel_wait_quiescent(kernel_tracer_fd); | |
1207 | break; | |
1208 | } | |
1209 | case LTTNG_DOMAIN_UST: | |
1210 | { | |
1211 | struct ltt_ust_channel *uchan; | |
1212 | struct ltt_ust_session *usess = session->ust_session; | |
1213 | ||
1214 | assert(usess); | |
1215 | ||
1216 | /* Get channel from global UST domain */ | |
1217 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1218 | channel_name); | |
1219 | if (uchan == NULL) { | |
1220 | /* Create default channel */ | |
7972aab2 | 1221 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST); |
2f77fc4b | 1222 | if (attr == NULL) { |
f73fabfd | 1223 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1224 | goto error; |
1225 | } | |
1226 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1227 | ||
1228 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1229 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1230 | free(attr); |
1231 | goto error; | |
1232 | } | |
1233 | free(attr); | |
1234 | ||
1235 | /* Get the newly created channel reference back */ | |
1236 | uchan = trace_ust_find_channel_by_name( | |
1237 | usess->domain_global.channels, channel_name); | |
1238 | assert(uchan); | |
1239 | } | |
1240 | ||
1241 | /* At this point, the session and channel exist on the tracer */ | |
7972aab2 | 1242 | ret = event_ust_enable_tracepoint(usess, uchan, event, filter); |
f73fabfd | 1243 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1244 | goto error; |
1245 | } | |
1246 | break; | |
1247 | } | |
1248 | #if 0 | |
1249 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1250 | case LTTNG_DOMAIN_UST_PID: | |
1251 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1252 | #endif | |
1253 | default: | |
f73fabfd | 1254 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1255 | goto error; |
1256 | } | |
1257 | ||
f73fabfd | 1258 | ret = LTTNG_OK; |
2f77fc4b DG |
1259 | |
1260 | error: | |
2223c96f | 1261 | rcu_read_unlock(); |
2f77fc4b DG |
1262 | return ret; |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1267 | */ | |
7972aab2 DG |
1268 | int cmd_enable_event_all(struct ltt_session *session, |
1269 | struct lttng_domain *domain, char *channel_name, int event_type, | |
025faf73 | 1270 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1271 | { |
1272 | int ret; | |
1273 | struct lttng_channel *attr; | |
1274 | ||
1275 | assert(session); | |
1276 | assert(channel_name); | |
1277 | ||
2223c96f DG |
1278 | rcu_read_lock(); |
1279 | ||
7972aab2 | 1280 | switch (domain->type) { |
2f77fc4b DG |
1281 | case LTTNG_DOMAIN_KERNEL: |
1282 | { | |
1283 | struct ltt_kernel_channel *kchan; | |
1284 | ||
1285 | assert(session->kernel_session); | |
1286 | ||
1287 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1288 | session->kernel_session); | |
1289 | if (kchan == NULL) { | |
1290 | /* Create default channel */ | |
7972aab2 | 1291 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL); |
2f77fc4b | 1292 | if (attr == NULL) { |
f73fabfd | 1293 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1294 | goto error; |
1295 | } | |
1296 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1297 | ||
1298 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1299 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1300 | free(attr); |
1301 | goto error; | |
1302 | } | |
1303 | free(attr); | |
1304 | ||
1305 | /* Get the newly created kernel channel pointer */ | |
1306 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1307 | session->kernel_session); | |
1308 | assert(kchan); | |
1309 | } | |
1310 | ||
1311 | switch (event_type) { | |
1312 | case LTTNG_EVENT_SYSCALL: | |
d3a56674 | 1313 | ret = event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1314 | break; |
1315 | case LTTNG_EVENT_TRACEPOINT: | |
1316 | /* | |
1317 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1318 | * events already registered to the channel. | |
1319 | */ | |
d3a56674 | 1320 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1321 | break; |
1322 | case LTTNG_EVENT_ALL: | |
1323 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1324 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1325 | break; |
1326 | default: | |
f73fabfd | 1327 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1328 | goto error; |
1329 | } | |
1330 | ||
1331 | /* Manage return value */ | |
f73fabfd | 1332 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1333 | /* |
1334 | * On error, cmd_enable_channel call will take care of destroying | |
1335 | * the created channel if it was needed. | |
1336 | */ | |
2f77fc4b DG |
1337 | goto error; |
1338 | } | |
1339 | ||
1340 | kernel_wait_quiescent(kernel_tracer_fd); | |
1341 | break; | |
1342 | } | |
1343 | case LTTNG_DOMAIN_UST: | |
1344 | { | |
1345 | struct ltt_ust_channel *uchan; | |
1346 | struct ltt_ust_session *usess = session->ust_session; | |
1347 | ||
1348 | assert(usess); | |
1349 | ||
1350 | /* Get channel from global UST domain */ | |
1351 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1352 | channel_name); | |
1353 | if (uchan == NULL) { | |
1354 | /* Create default channel */ | |
7972aab2 | 1355 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST); |
2f77fc4b | 1356 | if (attr == NULL) { |
f73fabfd | 1357 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1358 | goto error; |
1359 | } | |
1360 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1361 | ||
1362 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1363 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1364 | free(attr); |
1365 | goto error; | |
1366 | } | |
1367 | free(attr); | |
1368 | ||
1369 | /* Get the newly created channel reference back */ | |
1370 | uchan = trace_ust_find_channel_by_name( | |
1371 | usess->domain_global.channels, channel_name); | |
1372 | assert(uchan); | |
1373 | } | |
1374 | ||
1375 | /* At this point, the session and channel exist on the tracer */ | |
1376 | ||
1377 | switch (event_type) { | |
1378 | case LTTNG_EVENT_ALL: | |
1379 | case LTTNG_EVENT_TRACEPOINT: | |
7972aab2 | 1380 | ret = event_ust_enable_all_tracepoints(usess, uchan, filter); |
f73fabfd | 1381 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1382 | goto error; |
1383 | } | |
1384 | break; | |
1385 | default: | |
f73fabfd | 1386 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1387 | goto error; |
1388 | } | |
1389 | ||
1390 | /* Manage return value */ | |
f73fabfd | 1391 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1392 | goto error; |
1393 | } | |
1394 | ||
1395 | break; | |
1396 | } | |
1397 | #if 0 | |
1398 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1399 | case LTTNG_DOMAIN_UST_PID: | |
1400 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1401 | #endif | |
1402 | default: | |
f73fabfd | 1403 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1404 | goto error; |
1405 | } | |
1406 | ||
f73fabfd | 1407 | ret = LTTNG_OK; |
2f77fc4b DG |
1408 | |
1409 | error: | |
2223c96f | 1410 | rcu_read_unlock(); |
2f77fc4b DG |
1411 | return ret; |
1412 | } | |
1413 | ||
1414 | ||
1415 | /* | |
1416 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1417 | */ | |
1418 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1419 | { | |
1420 | int ret; | |
1421 | ssize_t nb_events = 0; | |
1422 | ||
1423 | switch (domain) { | |
1424 | case LTTNG_DOMAIN_KERNEL: | |
1425 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1426 | if (nb_events < 0) { | |
f73fabfd | 1427 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1428 | goto error; |
1429 | } | |
1430 | break; | |
1431 | case LTTNG_DOMAIN_UST: | |
1432 | nb_events = ust_app_list_events(events); | |
1433 | if (nb_events < 0) { | |
f73fabfd | 1434 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1435 | goto error; |
1436 | } | |
1437 | break; | |
1438 | default: | |
f73fabfd | 1439 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1440 | goto error; |
1441 | } | |
1442 | ||
1443 | return nb_events; | |
1444 | ||
1445 | error: | |
1446 | /* Return negative value to differentiate return code */ | |
1447 | return -ret; | |
1448 | } | |
1449 | ||
1450 | /* | |
1451 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1452 | */ | |
1453 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1454 | struct lttng_event_field **fields) | |
1455 | { | |
1456 | int ret; | |
1457 | ssize_t nb_fields = 0; | |
1458 | ||
1459 | switch (domain) { | |
1460 | case LTTNG_DOMAIN_UST: | |
1461 | nb_fields = ust_app_list_event_fields(fields); | |
1462 | if (nb_fields < 0) { | |
f73fabfd | 1463 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1464 | goto error; |
1465 | } | |
1466 | break; | |
1467 | case LTTNG_DOMAIN_KERNEL: | |
1468 | default: /* fall-through */ | |
f73fabfd | 1469 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1470 | goto error; |
1471 | } | |
1472 | ||
1473 | return nb_fields; | |
1474 | ||
1475 | error: | |
1476 | /* Return negative value to differentiate return code */ | |
1477 | return -ret; | |
1478 | } | |
1479 | ||
1480 | /* | |
1481 | * Command LTTNG_START_TRACE processed by the client thread. | |
1482 | */ | |
1483 | int cmd_start_trace(struct ltt_session *session) | |
1484 | { | |
1485 | int ret; | |
1486 | struct ltt_kernel_session *ksession; | |
1487 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1488 | |
1489 | assert(session); | |
1490 | ||
1491 | /* Ease our life a bit ;) */ | |
1492 | ksession = session->kernel_session; | |
1493 | usess = session->ust_session; | |
1494 | ||
1495 | if (session->enabled) { | |
1496 | /* Already started. */ | |
f73fabfd | 1497 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1498 | goto error; |
1499 | } | |
1500 | ||
1501 | session->enabled = 1; | |
1502 | ||
2f77fc4b DG |
1503 | /* Kernel tracing */ |
1504 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1505 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1506 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1507 | goto error; |
1508 | } | |
2f77fc4b DG |
1509 | } |
1510 | ||
1511 | /* Flag session that trace should start automatically */ | |
1512 | if (usess) { | |
1513 | usess->start_trace = 1; | |
1514 | ||
1515 | ret = ust_app_start_trace_all(usess); | |
1516 | if (ret < 0) { | |
f73fabfd | 1517 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1518 | goto error; |
1519 | } | |
1520 | } | |
1521 | ||
9b6c7ec5 DG |
1522 | session->started = 1; |
1523 | ||
f73fabfd | 1524 | ret = LTTNG_OK; |
2f77fc4b DG |
1525 | |
1526 | error: | |
1527 | return ret; | |
1528 | } | |
1529 | ||
1530 | /* | |
1531 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1532 | */ | |
1533 | int cmd_stop_trace(struct ltt_session *session) | |
1534 | { | |
1535 | int ret; | |
1536 | struct ltt_kernel_channel *kchan; | |
1537 | struct ltt_kernel_session *ksession; | |
1538 | struct ltt_ust_session *usess; | |
1539 | ||
1540 | assert(session); | |
1541 | ||
1542 | /* Short cut */ | |
1543 | ksession = session->kernel_session; | |
1544 | usess = session->ust_session; | |
1545 | ||
1546 | if (!session->enabled) { | |
f73fabfd | 1547 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1548 | goto error; |
1549 | } | |
1550 | ||
1551 | session->enabled = 0; | |
1552 | ||
1553 | /* Kernel tracer */ | |
1554 | if (ksession) { | |
1555 | DBG("Stop kernel tracing"); | |
1556 | ||
1557 | /* Flush metadata if exist */ | |
1558 | if (ksession->metadata_stream_fd >= 0) { | |
1559 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1560 | if (ret < 0) { | |
1561 | ERR("Kernel metadata flush failed"); | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | /* Flush all buffers before stopping */ | |
1566 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1567 | ret = kernel_flush_buffer(kchan); | |
1568 | if (ret < 0) { | |
1569 | ERR("Kernel flush buffer error"); | |
1570 | } | |
1571 | } | |
1572 | ||
1573 | ret = kernel_stop_session(ksession); | |
1574 | if (ret < 0) { | |
f73fabfd | 1575 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1576 | goto error; |
1577 | } | |
1578 | ||
1579 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 DG |
1580 | |
1581 | ksession->started = 0; | |
2f77fc4b DG |
1582 | } |
1583 | ||
1584 | if (usess) { | |
1585 | usess->start_trace = 0; | |
1586 | ||
1587 | ret = ust_app_stop_trace_all(usess); | |
1588 | if (ret < 0) { | |
f73fabfd | 1589 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1590 | goto error; |
1591 | } | |
1592 | } | |
1593 | ||
9b6c7ec5 DG |
1594 | session->started = 0; |
1595 | ||
f73fabfd | 1596 | ret = LTTNG_OK; |
2f77fc4b DG |
1597 | |
1598 | error: | |
1599 | return ret; | |
1600 | } | |
1601 | ||
1602 | /* | |
1603 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1604 | */ | |
1605 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1606 | size_t nb_uri, struct lttng_uri *uris) | |
1607 | { | |
1608 | int ret, i; | |
1609 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1610 | struct ltt_ust_session *usess = session->ust_session; | |
1611 | struct consumer_output *consumer = NULL; | |
1612 | ||
1613 | assert(session); | |
1614 | assert(uris); | |
1615 | assert(nb_uri > 0); | |
1616 | ||
1617 | /* Can't enable consumer after session started. */ | |
1618 | if (session->enabled) { | |
f73fabfd | 1619 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1620 | goto error; |
1621 | } | |
1622 | ||
2f77fc4b DG |
1623 | /* |
1624 | * This case switch makes sure the domain session has a temporary consumer | |
1625 | * so the URL can be set. | |
1626 | */ | |
1627 | switch (domain) { | |
1628 | case 0: | |
1629 | /* Code flow error. A session MUST always have a consumer object */ | |
1630 | assert(session->consumer); | |
1631 | /* | |
1632 | * The URL will be added to the tracing session consumer instead of a | |
1633 | * specific domain consumer. | |
1634 | */ | |
1635 | consumer = session->consumer; | |
1636 | break; | |
1637 | case LTTNG_DOMAIN_KERNEL: | |
1638 | /* Code flow error if we don't have a kernel session here. */ | |
1639 | assert(ksess); | |
785d2d0d DG |
1640 | assert(ksess->consumer); |
1641 | consumer = ksess->consumer; | |
2f77fc4b DG |
1642 | break; |
1643 | case LTTNG_DOMAIN_UST: | |
1644 | /* Code flow error if we don't have a kernel session here. */ | |
1645 | assert(usess); | |
785d2d0d DG |
1646 | assert(usess->consumer); |
1647 | consumer = usess->consumer; | |
2f77fc4b DG |
1648 | break; |
1649 | } | |
1650 | ||
1651 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b DG |
1652 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
1653 | if (ret < 0) { | |
1654 | goto error; | |
1655 | } | |
2f77fc4b DG |
1656 | } |
1657 | ||
1658 | /* All good! */ | |
f73fabfd | 1659 | ret = LTTNG_OK; |
2f77fc4b DG |
1660 | |
1661 | error: | |
1662 | return ret; | |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1667 | */ | |
1668 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
1669 | size_t nb_uri, lttng_sock_cred *creds) | |
1670 | { | |
1671 | int ret; | |
1672 | char *path = NULL; | |
1673 | struct ltt_session *session; | |
1674 | ||
1675 | assert(name); | |
1676 | ||
785d2d0d DG |
1677 | /* No URIs is not possible. */ |
1678 | if (uris == NULL) { | |
1679 | ret = LTTNG_ERR_SESSION_FAIL; | |
1680 | goto session_error; | |
1681 | } | |
1682 | ||
2f77fc4b DG |
1683 | /* |
1684 | * Verify if the session already exist | |
1685 | * | |
1686 | * XXX: There is no need for the session lock list here since the caller | |
1687 | * (process_client_msg) is holding it. We might want to change that so a | |
1688 | * single command does not lock the entire session list. | |
1689 | */ | |
1690 | session = session_find_by_name(name); | |
1691 | if (session != NULL) { | |
f73fabfd | 1692 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1693 | goto find_error; |
1694 | } | |
1695 | ||
1696 | /* Create tracing session in the registry */ | |
1697 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), | |
1698 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
f73fabfd | 1699 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1700 | goto session_error; |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * Get the newly created session pointer back | |
1705 | * | |
1706 | * XXX: There is no need for the session lock list here since the caller | |
1707 | * (process_client_msg) is holding it. We might want to change that so a | |
1708 | * single command does not lock the entire session list. | |
1709 | */ | |
1710 | session = session_find_by_name(name); | |
1711 | assert(session); | |
1712 | ||
1713 | /* Create default consumer output for the session not yet created. */ | |
1714 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1715 | if (session->consumer == NULL) { | |
f73fabfd | 1716 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1717 | goto consumer_error; |
1718 | } | |
1719 | ||
2f77fc4b | 1720 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); |
f73fabfd | 1721 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1722 | goto consumer_error; |
1723 | } | |
1724 | ||
1725 | session->consumer->enabled = 1; | |
1726 | ||
f73fabfd | 1727 | return LTTNG_OK; |
2f77fc4b DG |
1728 | |
1729 | consumer_error: | |
1730 | session_destroy(session); | |
1731 | session_error: | |
1732 | find_error: | |
1733 | return ret; | |
1734 | } | |
1735 | ||
1736 | /* | |
1737 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1738 | */ | |
1739 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1740 | { | |
1741 | int ret; | |
1742 | struct ltt_ust_session *usess; | |
1743 | struct ltt_kernel_session *ksess; | |
1744 | ||
1745 | /* Safety net */ | |
1746 | assert(session); | |
1747 | ||
1748 | usess = session->ust_session; | |
1749 | ksess = session->kernel_session; | |
1750 | ||
1751 | /* Clean kernel session teardown */ | |
1752 | kernel_destroy_session(ksess); | |
1753 | ||
1754 | /* UST session teardown */ | |
1755 | if (usess) { | |
1756 | /* Close any relayd session */ | |
1757 | consumer_output_send_destroy_relayd(usess->consumer); | |
1758 | ||
1759 | /* Destroy every UST application related to this session. */ | |
1760 | ret = ust_app_destroy_trace_all(usess); | |
1761 | if (ret) { | |
1762 | ERR("Error in ust_app_destroy_trace_all"); | |
1763 | } | |
1764 | ||
1765 | /* Clean up the rest. */ | |
1766 | trace_ust_destroy_session(usess); | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Must notify the kernel thread here to update it's poll set in order to | |
1771 | * remove the channel(s)' fd just destroyed. | |
1772 | */ | |
1773 | ret = notify_thread_pipe(wpipe); | |
1774 | if (ret < 0) { | |
1775 | PERROR("write kernel poll pipe"); | |
1776 | } | |
1777 | ||
1778 | ret = session_destroy(session); | |
1779 | ||
1780 | return ret; | |
1781 | } | |
1782 | ||
1783 | /* | |
1784 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1785 | */ | |
1786 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1787 | { | |
1788 | int ret; | |
1789 | ||
1790 | switch (domain) { | |
1791 | case LTTNG_DOMAIN_KERNEL: | |
1792 | { | |
1793 | struct lttng_kernel_calibrate kcalibrate; | |
1794 | ||
1795 | kcalibrate.type = calibrate->type; | |
1796 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1797 | if (ret < 0) { | |
f73fabfd | 1798 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1799 | goto error; |
1800 | } | |
1801 | break; | |
1802 | } | |
1803 | case LTTNG_DOMAIN_UST: | |
1804 | { | |
1805 | struct lttng_ust_calibrate ucalibrate; | |
1806 | ||
1807 | ucalibrate.type = calibrate->type; | |
1808 | ret = ust_app_calibrate_glb(&ucalibrate); | |
1809 | if (ret < 0) { | |
f73fabfd | 1810 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
1811 | goto error; |
1812 | } | |
1813 | break; | |
1814 | } | |
1815 | default: | |
f73fabfd | 1816 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1817 | goto error; |
1818 | } | |
1819 | ||
f73fabfd | 1820 | ret = LTTNG_OK; |
2f77fc4b DG |
1821 | |
1822 | error: | |
1823 | return ret; | |
1824 | } | |
1825 | ||
1826 | /* | |
1827 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
1828 | */ | |
1829 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
1830 | const char *sock_path, struct consumer_data *cdata) | |
1831 | { | |
1832 | int ret, sock; | |
1833 | struct consumer_socket *socket; | |
1834 | ||
1835 | assert(session); | |
1836 | assert(cdata); | |
1837 | assert(sock_path); | |
1838 | ||
1839 | switch (domain) { | |
1840 | case LTTNG_DOMAIN_KERNEL: | |
1841 | { | |
1842 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1843 | ||
1844 | assert(ksess); | |
1845 | ||
1846 | /* Can't register a consumer if there is already one */ | |
1847 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 1848 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
1849 | goto error; |
1850 | } | |
1851 | ||
1852 | sock = lttcomm_connect_unix_sock(sock_path); | |
1853 | if (sock < 0) { | |
f73fabfd | 1854 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
1855 | goto error; |
1856 | } | |
1857 | ||
1858 | socket = consumer_allocate_socket(sock); | |
1859 | if (socket == NULL) { | |
f66c074c DG |
1860 | ret = close(sock); |
1861 | if (ret < 0) { | |
1862 | PERROR("close register consumer"); | |
1863 | } | |
f73fabfd | 1864 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1865 | goto error; |
1866 | } | |
1867 | ||
1868 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
1869 | if (socket->lock == NULL) { | |
1870 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 1871 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1872 | goto error; |
1873 | } | |
1874 | pthread_mutex_init(socket->lock, NULL); | |
1875 | socket->registered = 1; | |
1876 | ||
1877 | rcu_read_lock(); | |
1878 | consumer_add_socket(socket, ksess->consumer); | |
1879 | rcu_read_unlock(); | |
1880 | ||
1881 | pthread_mutex_lock(&cdata->pid_mutex); | |
1882 | cdata->pid = -1; | |
1883 | pthread_mutex_unlock(&cdata->pid_mutex); | |
1884 | ||
1885 | break; | |
1886 | } | |
1887 | default: | |
1888 | /* TODO: Userspace tracing */ | |
f73fabfd | 1889 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1890 | goto error; |
1891 | } | |
1892 | ||
f73fabfd | 1893 | ret = LTTNG_OK; |
2f77fc4b DG |
1894 | |
1895 | error: | |
1896 | return ret; | |
1897 | } | |
1898 | ||
1899 | /* | |
1900 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
1901 | */ | |
1902 | ssize_t cmd_list_domains(struct ltt_session *session, | |
1903 | struct lttng_domain **domains) | |
1904 | { | |
1905 | int ret, index = 0; | |
1906 | ssize_t nb_dom = 0; | |
1907 | ||
1908 | if (session->kernel_session != NULL) { | |
1909 | DBG3("Listing domains found kernel domain"); | |
1910 | nb_dom++; | |
1911 | } | |
1912 | ||
1913 | if (session->ust_session != NULL) { | |
1914 | DBG3("Listing domains found UST global domain"); | |
1915 | nb_dom++; | |
1916 | } | |
1917 | ||
1918 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
1919 | if (*domains == NULL) { | |
f73fabfd | 1920 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1921 | goto error; |
1922 | } | |
1923 | ||
1924 | if (session->kernel_session != NULL) { | |
1925 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
1926 | index++; | |
1927 | } | |
1928 | ||
1929 | if (session->ust_session != NULL) { | |
1930 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
1931 | index++; | |
1932 | } | |
1933 | ||
1934 | return nb_dom; | |
1935 | ||
1936 | error: | |
f73fabfd DG |
1937 | /* Return negative value to differentiate return code */ |
1938 | return -ret; | |
2f77fc4b DG |
1939 | } |
1940 | ||
1941 | ||
1942 | /* | |
1943 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
1944 | */ | |
1945 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
1946 | struct lttng_channel **channels) | |
1947 | { | |
1948 | int ret; | |
1949 | ssize_t nb_chan = 0; | |
1950 | ||
1951 | switch (domain) { | |
1952 | case LTTNG_DOMAIN_KERNEL: | |
1953 | if (session->kernel_session != NULL) { | |
1954 | nb_chan = session->kernel_session->channel_count; | |
1955 | } | |
1956 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
1957 | if (nb_chan <= 0) { |
1958 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
1959 | } | |
2f77fc4b DG |
1960 | break; |
1961 | case LTTNG_DOMAIN_UST: | |
1962 | if (session->ust_session != NULL) { | |
1963 | nb_chan = lttng_ht_get_count( | |
1964 | session->ust_session->domain_global.channels); | |
1965 | } | |
1966 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
1967 | if (nb_chan <= 0) { |
1968 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1969 | } | |
2f77fc4b DG |
1970 | break; |
1971 | default: | |
1972 | *channels = NULL; | |
f73fabfd | 1973 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1974 | goto error; |
1975 | } | |
1976 | ||
1977 | if (nb_chan > 0) { | |
1978 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
1979 | if (*channels == NULL) { | |
f73fabfd | 1980 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1981 | goto error; |
1982 | } | |
1983 | ||
1984 | list_lttng_channels(domain, session, *channels); | |
1985 | } else { | |
1986 | *channels = NULL; | |
c7d620a2 DG |
1987 | /* Ret value was set in the domain switch case */ |
1988 | goto error; | |
2f77fc4b DG |
1989 | } |
1990 | ||
1991 | return nb_chan; | |
1992 | ||
1993 | error: | |
f73fabfd DG |
1994 | /* Return negative value to differentiate return code */ |
1995 | return -ret; | |
2f77fc4b DG |
1996 | } |
1997 | ||
1998 | /* | |
1999 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2000 | */ | |
2001 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2002 | char *channel_name, struct lttng_event **events) | |
2003 | { | |
2004 | int ret = 0; | |
2005 | ssize_t nb_event = 0; | |
2006 | ||
2007 | switch (domain) { | |
2008 | case LTTNG_DOMAIN_KERNEL: | |
2009 | if (session->kernel_session != NULL) { | |
2010 | nb_event = list_lttng_kernel_events(channel_name, | |
2011 | session->kernel_session, events); | |
2012 | } | |
2013 | break; | |
2014 | case LTTNG_DOMAIN_UST: | |
2015 | { | |
2016 | if (session->ust_session != NULL) { | |
2017 | nb_event = list_lttng_ust_global_events(channel_name, | |
2018 | &session->ust_session->domain_global, events); | |
2019 | } | |
2020 | break; | |
2021 | } | |
2022 | default: | |
f73fabfd | 2023 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2024 | goto error; |
2025 | } | |
2026 | ||
f73fabfd | 2027 | return nb_event; |
2f77fc4b DG |
2028 | |
2029 | error: | |
f73fabfd DG |
2030 | /* Return negative value to differentiate return code */ |
2031 | return -ret; | |
2f77fc4b DG |
2032 | } |
2033 | ||
2034 | /* | |
2035 | * Using the session list, filled a lttng_session array to send back to the | |
2036 | * client for session listing. | |
2037 | * | |
2038 | * The session list lock MUST be acquired before calling this function. Use | |
2039 | * session_lock_list() and session_unlock_list(). | |
2040 | */ | |
2041 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2042 | gid_t gid) | |
2043 | { | |
2044 | int ret; | |
2045 | unsigned int i = 0; | |
2046 | struct ltt_session *session; | |
2047 | struct ltt_session_list *list = session_get_list(); | |
2048 | ||
2049 | DBG("Getting all available session for UID %d GID %d", | |
2050 | uid, gid); | |
2051 | /* | |
2052 | * Iterate over session list and append data after the control struct in | |
2053 | * the buffer. | |
2054 | */ | |
2055 | cds_list_for_each_entry(session, &list->head, list) { | |
2056 | /* | |
2057 | * Only list the sessions the user can control. | |
2058 | */ | |
2059 | if (!session_access_ok(session, uid, gid)) { | |
2060 | continue; | |
2061 | } | |
2062 | ||
2063 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2064 | struct ltt_ust_session *usess = session->ust_session; | |
2065 | ||
2066 | if (session->consumer->type == CONSUMER_DST_NET || | |
2067 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2068 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2069 | ret = build_network_session_path(sessions[i].path, | |
2070 | sizeof(session[i].path), session); | |
2071 | } else { | |
2072 | ret = snprintf(sessions[i].path, sizeof(session[i].path), "%s", | |
2073 | session->consumer->dst.trace_path); | |
2074 | } | |
2075 | if (ret < 0) { | |
2076 | PERROR("snprintf session path"); | |
2077 | continue; | |
2078 | } | |
2079 | ||
2080 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2081 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2082 | sessions[i].enabled = session->enabled; | |
2083 | i++; | |
2084 | } | |
2085 | } | |
2086 | ||
806e2684 | 2087 | /* |
6d805429 DG |
2088 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
2089 | * ready for trace analysis (or anykind of reader) or else 1 for pending data. | |
806e2684 | 2090 | */ |
6d805429 | 2091 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2092 | { |
2093 | int ret; | |
2094 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2095 | struct ltt_ust_session *usess = session->ust_session; | |
2096 | ||
2097 | assert(session); | |
2098 | ||
2099 | /* Session MUST be stopped to ask for data availability. */ | |
2100 | if (session->enabled) { | |
2101 | ret = LTTNG_ERR_SESSION_STARTED; | |
2102 | goto error; | |
2103 | } | |
2104 | ||
2105 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2106 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2107 | if (ret == 1) { | |
806e2684 DG |
2108 | /* Data is still being extracted for the kernel. */ |
2109 | goto error; | |
2110 | } | |
2111 | } | |
2112 | ||
2113 | if (usess && usess->consumer) { | |
6d805429 DG |
2114 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2115 | if (ret == 1) { | |
806e2684 DG |
2116 | /* Data is still being extracted for the kernel. */ |
2117 | goto error; | |
2118 | } | |
2119 | } | |
2120 | ||
2121 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2122 | ret = 0; |
806e2684 DG |
2123 | |
2124 | error: | |
2125 | return ret; | |
2126 | } | |
2127 | ||
2f77fc4b DG |
2128 | /* |
2129 | * Init command subsystem. | |
2130 | */ | |
2131 | void cmd_init(void) | |
2132 | { | |
2133 | /* | |
d88aee68 DG |
2134 | * Set network sequence index to 1 for streams to match a relayd |
2135 | * socket on the consumer side. | |
2f77fc4b | 2136 | */ |
d88aee68 DG |
2137 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
2138 | relayd_net_seq_idx = 1; | |
2139 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
2140 | |
2141 | DBG("Command subsystem initialized"); | |
2142 | } |