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> | |
6dc3064a | 20 | #include <inttypes.h> |
2f77fc4b DG |
21 | #include <urcu/list.h> |
22 | #include <urcu/uatomic.h> | |
23 | ||
24 | #include <common/defaults.h> | |
25 | #include <common/common.h> | |
26 | #include <common/sessiond-comm/sessiond-comm.h> | |
27 | #include <common/relayd/relayd.h> | |
10a50311 | 28 | #include <common/utils.h> |
2f77fc4b DG |
29 | |
30 | #include "channel.h" | |
31 | #include "consumer.h" | |
32 | #include "event.h" | |
8782cc74 | 33 | #include "health-sessiond.h" |
2f77fc4b DG |
34 | #include "kernel.h" |
35 | #include "kernel-consumer.h" | |
36 | #include "lttng-sessiond.h" | |
37 | #include "utils.h" | |
38 | ||
39 | #include "cmd.h" | |
40 | ||
41 | /* | |
42 | * Used to keep a unique index for each relayd socket created where this value | |
43 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
44 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
45 | * held. | |
2f77fc4b | 46 | */ |
d88aee68 DG |
47 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
48 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b DG |
49 | |
50 | /* | |
51 | * Create a session path used by list_lttng_sessions for the case that the | |
52 | * session consumer is on the network. | |
53 | */ | |
54 | static int build_network_session_path(char *dst, size_t size, | |
55 | struct ltt_session *session) | |
56 | { | |
57 | int ret, kdata_port, udata_port; | |
58 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
59 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
60 | ||
61 | assert(session); | |
62 | assert(dst); | |
63 | ||
64 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
65 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
66 | ||
67 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
68 | ||
69 | if (session->kernel_session && session->kernel_session->consumer) { | |
70 | kuri = &session->kernel_session->consumer->dst.net.control; | |
71 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
72 | } | |
73 | ||
74 | if (session->ust_session && session->ust_session->consumer) { | |
75 | uuri = &session->ust_session->consumer->dst.net.control; | |
76 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
77 | } | |
78 | ||
79 | if (uuri == NULL && kuri == NULL) { | |
80 | uri = &session->consumer->dst.net.control; | |
81 | kdata_port = session->consumer->dst.net.data.port; | |
82 | } else if (kuri && uuri) { | |
83 | ret = uri_compare(kuri, uuri); | |
84 | if (ret) { | |
85 | /* Not Equal */ | |
86 | uri = kuri; | |
87 | /* Build uuri URL string */ | |
88 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
89 | if (ret < 0) { | |
90 | goto error; | |
91 | } | |
92 | } else { | |
93 | uri = kuri; | |
94 | } | |
95 | } else if (kuri && uuri == NULL) { | |
96 | uri = kuri; | |
97 | } else if (uuri && kuri == NULL) { | |
98 | uri = uuri; | |
99 | } | |
100 | ||
101 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
102 | if (ret < 0) { | |
103 | goto error; | |
104 | } | |
105 | ||
9aa9f900 DG |
106 | /* |
107 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
108 | * to print. | |
109 | */ | |
9d035200 | 110 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
111 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
112 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
113 | } else { | |
9aa9f900 | 114 | int dport; |
bef08707 | 115 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
116 | dport = kdata_port; |
117 | } else { | |
118 | /* No kernel URI, use the UST port. */ | |
119 | dport = udata_port; | |
120 | } | |
121 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
122 | } |
123 | ||
124 | error: | |
125 | return ret; | |
126 | } | |
127 | ||
128 | /* | |
129 | * Fill lttng_channel array of all channels. | |
130 | */ | |
131 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
132 | struct lttng_channel *channels) | |
133 | { | |
134 | int i = 0; | |
135 | struct ltt_kernel_channel *kchan; | |
136 | ||
137 | DBG("Listing channels for session %s", session->name); | |
138 | ||
139 | switch (domain) { | |
140 | case LTTNG_DOMAIN_KERNEL: | |
141 | /* Kernel channels */ | |
142 | if (session->kernel_session != NULL) { | |
143 | cds_list_for_each_entry(kchan, | |
144 | &session->kernel_session->channel_list.head, list) { | |
145 | /* Copy lttng_channel struct to array */ | |
146 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
147 | channels[i].enabled = kchan->enabled; | |
148 | i++; | |
149 | } | |
150 | } | |
151 | break; | |
152 | case LTTNG_DOMAIN_UST: | |
153 | { | |
154 | struct lttng_ht_iter iter; | |
155 | struct ltt_ust_channel *uchan; | |
156 | ||
e7fe706f | 157 | rcu_read_lock(); |
2f77fc4b DG |
158 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
159 | &iter.iter, uchan, node.node) { | |
160 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
161 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
162 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
163 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
164 | channels[i].attr.switch_timer_interval = | |
165 | uchan->attr.switch_timer_interval; | |
166 | channels[i].attr.read_timer_interval = | |
167 | uchan->attr.read_timer_interval; | |
168 | channels[i].enabled = uchan->enabled; | |
169 | switch (uchan->attr.output) { | |
170 | case LTTNG_UST_MMAP: | |
171 | default: | |
172 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
173 | break; | |
174 | } | |
175 | i++; | |
176 | } | |
e7fe706f | 177 | rcu_read_unlock(); |
2f77fc4b DG |
178 | break; |
179 | } | |
180 | default: | |
181 | break; | |
182 | } | |
183 | } | |
184 | ||
185 | /* | |
186 | * Create a list of ust global domain events. | |
187 | */ | |
188 | static int list_lttng_ust_global_events(char *channel_name, | |
189 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
190 | { | |
191 | int i = 0, ret = 0; | |
192 | unsigned int nb_event = 0; | |
193 | struct lttng_ht_iter iter; | |
194 | struct lttng_ht_node_str *node; | |
195 | struct ltt_ust_channel *uchan; | |
196 | struct ltt_ust_event *uevent; | |
197 | struct lttng_event *tmp; | |
198 | ||
199 | DBG("Listing UST global events for channel %s", channel_name); | |
200 | ||
201 | rcu_read_lock(); | |
202 | ||
203 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
204 | node = lttng_ht_iter_get_node_str(&iter); | |
205 | if (node == NULL) { | |
f73fabfd | 206 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
207 | goto error; |
208 | } | |
209 | ||
210 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
211 | ||
212 | nb_event += lttng_ht_get_count(uchan->events); | |
213 | ||
214 | if (nb_event == 0) { | |
215 | ret = nb_event; | |
216 | goto error; | |
217 | } | |
218 | ||
219 | DBG3("Listing UST global %d events", nb_event); | |
220 | ||
221 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
222 | if (tmp == NULL) { | |
f73fabfd | 223 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
224 | goto error; |
225 | } | |
226 | ||
227 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
228 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
229 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
230 | tmp[i].enabled = uevent->enabled; | |
231 | ||
232 | switch (uevent->attr.instrumentation) { | |
233 | case LTTNG_UST_TRACEPOINT: | |
234 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
235 | break; | |
236 | case LTTNG_UST_PROBE: | |
237 | tmp[i].type = LTTNG_EVENT_PROBE; | |
238 | break; | |
239 | case LTTNG_UST_FUNCTION: | |
240 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
241 | break; | |
242 | } | |
243 | ||
244 | tmp[i].loglevel = uevent->attr.loglevel; | |
245 | switch (uevent->attr.loglevel_type) { | |
246 | case LTTNG_UST_LOGLEVEL_ALL: | |
247 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
248 | break; | |
249 | case LTTNG_UST_LOGLEVEL_RANGE: | |
250 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
251 | break; | |
252 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
253 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
254 | break; | |
255 | } | |
256 | if (uevent->filter) { | |
257 | tmp[i].filter = 1; | |
258 | } | |
259 | i++; | |
260 | } | |
261 | ||
262 | ret = nb_event; | |
263 | *events = tmp; | |
264 | ||
265 | error: | |
266 | rcu_read_unlock(); | |
267 | return ret; | |
268 | } | |
269 | ||
270 | /* | |
271 | * Fill lttng_event array of all kernel events in the channel. | |
272 | */ | |
273 | static int list_lttng_kernel_events(char *channel_name, | |
274 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
275 | { | |
276 | int i = 0, ret; | |
277 | unsigned int nb_event; | |
278 | struct ltt_kernel_event *event; | |
279 | struct ltt_kernel_channel *kchan; | |
280 | ||
281 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
282 | if (kchan == NULL) { | |
f73fabfd | 283 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
284 | goto error; |
285 | } | |
286 | ||
287 | nb_event = kchan->event_count; | |
288 | ||
289 | DBG("Listing events for channel %s", kchan->channel->name); | |
290 | ||
291 | if (nb_event == 0) { | |
f73fabfd | 292 | goto end; |
2f77fc4b DG |
293 | } |
294 | ||
295 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
296 | if (*events == NULL) { | |
f73fabfd | 297 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
298 | goto error; |
299 | } | |
300 | ||
301 | /* Kernel channels */ | |
302 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
303 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
304 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
305 | (*events)[i].enabled = event->enabled; | |
306 | ||
307 | switch (event->event->instrumentation) { | |
308 | case LTTNG_KERNEL_TRACEPOINT: | |
309 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
310 | break; | |
2f77fc4b | 311 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
312 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
313 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
314 | sizeof(struct lttng_kernel_kprobe)); | |
315 | break; | |
316 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
317 | (*events)[i].type = LTTNG_EVENT_PROBE; |
318 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
319 | sizeof(struct lttng_kernel_kprobe)); | |
320 | break; | |
321 | case LTTNG_KERNEL_FUNCTION: | |
322 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
323 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
324 | sizeof(struct lttng_kernel_function)); | |
325 | break; | |
326 | case LTTNG_KERNEL_NOOP: | |
327 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
328 | break; | |
329 | case LTTNG_KERNEL_SYSCALL: | |
330 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
331 | break; | |
332 | case LTTNG_KERNEL_ALL: | |
333 | assert(0); | |
334 | break; | |
335 | } | |
336 | i++; | |
337 | } | |
338 | ||
f73fabfd | 339 | end: |
2f77fc4b DG |
340 | return nb_event; |
341 | ||
342 | error: | |
f73fabfd DG |
343 | /* Negate the error code to differentiate the size from an error */ |
344 | return -ret; | |
2f77fc4b DG |
345 | } |
346 | ||
347 | /* | |
348 | * Add URI so the consumer output object. Set the correct path depending on the | |
349 | * domain adding the default trace directory. | |
350 | */ | |
351 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
352 | struct lttng_uri *uri, int domain, const char *session_name) | |
353 | { | |
f73fabfd | 354 | int ret = LTTNG_OK; |
2f77fc4b DG |
355 | const char *default_trace_dir; |
356 | ||
357 | assert(uri); | |
358 | ||
359 | if (consumer == NULL) { | |
360 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 361 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
362 | goto error; |
363 | } | |
364 | ||
365 | switch (domain) { | |
366 | case LTTNG_DOMAIN_KERNEL: | |
367 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
368 | break; | |
369 | case LTTNG_DOMAIN_UST: | |
370 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
371 | break; | |
372 | default: | |
373 | /* | |
374 | * This case is possible is we try to add the URI to the global tracing | |
375 | * session consumer object which in this case there is no subdir. | |
376 | */ | |
377 | default_trace_dir = ""; | |
378 | } | |
379 | ||
380 | switch (uri->dtype) { | |
381 | case LTTNG_DST_IPV4: | |
382 | case LTTNG_DST_IPV6: | |
383 | DBG2("Setting network URI to consumer"); | |
384 | ||
df75acac DG |
385 | if (consumer->type == CONSUMER_DST_NET) { |
386 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
387 | consumer->dst.net.control_isset) || |
388 | (uri->stype == LTTNG_STREAM_DATA && | |
389 | consumer->dst.net.data_isset)) { | |
df75acac DG |
390 | ret = LTTNG_ERR_URL_EXIST; |
391 | goto error; | |
392 | } | |
393 | } else { | |
394 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
395 | } |
396 | ||
df75acac DG |
397 | consumer->type = CONSUMER_DST_NET; |
398 | ||
2f77fc4b DG |
399 | /* Set URI into consumer output object */ |
400 | ret = consumer_set_network_uri(consumer, uri); | |
401 | if (ret < 0) { | |
a74934ba | 402 | ret = -ret; |
2f77fc4b DG |
403 | goto error; |
404 | } else if (ret == 1) { | |
405 | /* | |
406 | * URI was the same in the consumer so we do not append the subdir | |
407 | * again so to not duplicate output dir. | |
408 | */ | |
409 | goto error; | |
410 | } | |
411 | ||
412 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
413 | ret = consumer_set_subdir(consumer, session_name); | |
414 | if (ret < 0) { | |
f73fabfd | 415 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
416 | goto error; |
417 | } | |
418 | } | |
419 | ||
420 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
421 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
422 | strncat(consumer->subdir, default_trace_dir, |
423 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
424 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
425 | } | |
426 | ||
427 | break; | |
428 | case LTTNG_DST_PATH: | |
429 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
430 | memset(consumer->dst.trace_path, 0, | |
431 | sizeof(consumer->dst.trace_path)); | |
432 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
433 | sizeof(consumer->dst.trace_path)); | |
434 | /* Append default trace dir */ | |
435 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
436 | sizeof(consumer->dst.trace_path) - |
437 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
438 | /* Flag consumer as local. */ |
439 | consumer->type = CONSUMER_DST_LOCAL; | |
440 | break; | |
441 | } | |
442 | ||
a74934ba DG |
443 | ret = LTTNG_OK; |
444 | ||
2f77fc4b DG |
445 | error: |
446 | return ret; | |
447 | } | |
448 | ||
449 | /* | |
450 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
451 | */ | |
452 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
453 | { | |
454 | int ret = 0; | |
455 | struct lttng_ht_iter iter; | |
456 | struct consumer_socket *socket; | |
457 | ||
458 | assert(session); | |
459 | ||
e7fe706f DG |
460 | rcu_read_lock(); |
461 | ||
2f77fc4b DG |
462 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
463 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
464 | socket, node.node) { | |
2f77fc4b | 465 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 466 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
467 | pthread_mutex_unlock(socket->lock); |
468 | if (ret < 0) { | |
f73fabfd | 469 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
470 | goto error; |
471 | } | |
472 | } | |
473 | } | |
474 | ||
475 | error: | |
e7fe706f | 476 | rcu_read_unlock(); |
2f77fc4b DG |
477 | return ret; |
478 | } | |
479 | ||
480 | /* | |
481 | * Create a socket to the relayd using the URI. | |
482 | * | |
483 | * On success, the relayd_sock pointer is set to the created socket. | |
484 | * Else, it's stays untouched and a lttcomm error code is returned. | |
485 | */ | |
6151a90f JD |
486 | static int create_connect_relayd(struct lttng_uri *uri, |
487 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
488 | { |
489 | int ret; | |
6151a90f | 490 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 491 | |
6151a90f JD |
492 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
493 | RELAYD_VERSION_COMM_MINOR); | |
494 | if (!rsock) { | |
f73fabfd | 495 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
496 | goto error; |
497 | } | |
498 | ||
ffe60014 DG |
499 | /* |
500 | * Connect to relayd so we can proceed with a session creation. This call | |
501 | * can possibly block for an arbitrary amount of time to set the health | |
502 | * state to be in poll execution. | |
503 | */ | |
504 | health_poll_entry(); | |
6151a90f | 505 | ret = relayd_connect(rsock); |
ffe60014 | 506 | health_poll_exit(); |
2f77fc4b DG |
507 | if (ret < 0) { |
508 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 509 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
510 | goto free_sock; |
511 | } | |
512 | ||
513 | /* Create socket for control stream. */ | |
514 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
515 | DBG3("Creating relayd stream socket from URI"); | |
516 | ||
517 | /* Check relayd version */ | |
6151a90f | 518 | ret = relayd_version_check(rsock); |
2f77fc4b | 519 | if (ret < 0) { |
f73fabfd | 520 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
521 | goto close_sock; |
522 | } | |
523 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
524 | DBG3("Creating relayd data socket from URI"); | |
525 | } else { | |
526 | /* Command is not valid */ | |
527 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 528 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
529 | goto close_sock; |
530 | } | |
531 | ||
6151a90f | 532 | *relayd_sock = rsock; |
2f77fc4b | 533 | |
f73fabfd | 534 | return LTTNG_OK; |
2f77fc4b DG |
535 | |
536 | close_sock: | |
6151a90f JD |
537 | /* The returned value is not useful since we are on an error path. */ |
538 | (void) relayd_close(rsock); | |
2f77fc4b | 539 | free_sock: |
6151a90f | 540 | free(rsock); |
2f77fc4b DG |
541 | error: |
542 | return ret; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Connect to the relayd using URI and send the socket to the right consumer. | |
547 | */ | |
6dc3064a | 548 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 549 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
550 | struct consumer_socket *consumer_sock, |
551 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
552 | { |
553 | int ret; | |
6151a90f | 554 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 555 | |
ffe60014 | 556 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 557 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 558 | if (ret != LTTNG_OK) { |
6151a90f | 559 | goto error; |
ffe60014 | 560 | } |
6151a90f | 561 | assert(rsock); |
ffe60014 | 562 | |
2f77fc4b | 563 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
564 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
565 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
566 | /* |
567 | * Increment net_seq_idx because we are about to transfer the | |
568 | * new relayd socket to the consumer. | |
d88aee68 | 569 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 570 | */ |
d88aee68 DG |
571 | consumer->net_seq_index = ++relayd_net_seq_idx; |
572 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
573 | } |
574 | ||
2f77fc4b | 575 | /* Send relayd socket to consumer. */ |
6151a90f | 576 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
577 | relayd_uri->stype, session_id, |
578 | session_name, hostname, session_live_timer); | |
2f77fc4b | 579 | if (ret < 0) { |
f73fabfd | 580 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
581 | goto close_sock; |
582 | } | |
583 | ||
c890b720 DG |
584 | /* Flag that the corresponding socket was sent. */ |
585 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 586 | consumer_sock->control_sock_sent = 1; |
c890b720 | 587 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 588 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
589 | } |
590 | ||
f73fabfd | 591 | ret = LTTNG_OK; |
2f77fc4b DG |
592 | |
593 | /* | |
594 | * Close socket which was dup on the consumer side. The session daemon does | |
595 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
596 | */ | |
597 | ||
598 | close_sock: | |
6151a90f JD |
599 | (void) relayd_close(rsock); |
600 | free(rsock); | |
2f77fc4b | 601 | |
6151a90f | 602 | error: |
ffe60014 DG |
603 | if (ret != LTTNG_OK) { |
604 | /* | |
d9078d0c DG |
605 | * The consumer output for this session should not be used anymore |
606 | * since the relayd connection failed thus making any tracing or/and | |
607 | * streaming not usable. | |
ffe60014 | 608 | */ |
d9078d0c | 609 | consumer->enabled = 0; |
ffe60014 | 610 | } |
2f77fc4b DG |
611 | return ret; |
612 | } | |
613 | ||
614 | /* | |
615 | * Send both relayd sockets to a specific consumer and domain. This is a | |
616 | * helper function to facilitate sending the information to the consumer for a | |
617 | * session. | |
618 | */ | |
6dc3064a | 619 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
620 | struct consumer_output *consumer, struct consumer_socket *sock, |
621 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 622 | { |
dda67f6c | 623 | int ret = LTTNG_OK; |
2f77fc4b | 624 | |
2f77fc4b | 625 | assert(consumer); |
6dc3064a | 626 | assert(sock); |
2f77fc4b | 627 | |
2f77fc4b | 628 | /* Sending control relayd socket. */ |
ffe60014 | 629 | if (!sock->control_sock_sent) { |
6dc3064a | 630 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
631 | &consumer->dst.net.control, consumer, sock, |
632 | session_name, hostname, session_live_timer); | |
c890b720 DG |
633 | if (ret != LTTNG_OK) { |
634 | goto error; | |
635 | } | |
2f77fc4b DG |
636 | } |
637 | ||
638 | /* Sending data relayd socket. */ | |
ffe60014 | 639 | if (!sock->data_sock_sent) { |
6dc3064a | 640 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
641 | &consumer->dst.net.data, consumer, sock, |
642 | session_name, hostname, session_live_timer); | |
c890b720 DG |
643 | if (ret != LTTNG_OK) { |
644 | goto error; | |
645 | } | |
2f77fc4b DG |
646 | } |
647 | ||
2f77fc4b DG |
648 | error: |
649 | return ret; | |
650 | } | |
651 | ||
652 | /* | |
653 | * Setup relayd connections for a tracing session. First creates the socket to | |
654 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
655 | * network. | |
656 | */ | |
ffe60014 | 657 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 658 | { |
f73fabfd | 659 | int ret = LTTNG_OK; |
2f77fc4b DG |
660 | struct ltt_ust_session *usess; |
661 | struct ltt_kernel_session *ksess; | |
662 | struct consumer_socket *socket; | |
663 | struct lttng_ht_iter iter; | |
664 | ||
665 | assert(session); | |
666 | ||
667 | usess = session->ust_session; | |
668 | ksess = session->kernel_session; | |
669 | ||
785d2d0d | 670 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 671 | |
e7fe706f DG |
672 | rcu_read_lock(); |
673 | ||
2f77fc4b DG |
674 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
675 | && usess->consumer->enabled) { | |
676 | /* For each consumer socket, send relayd sockets */ | |
677 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
678 | socket, node.node) { | |
2f77fc4b | 679 | pthread_mutex_lock(socket->lock); |
6dc3064a | 680 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
681 | usess->consumer, socket, |
682 | session->name, session->hostname, | |
683 | session->live_timer); | |
2f77fc4b | 684 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 685 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
686 | goto error; |
687 | } | |
6dc3064a DG |
688 | /* Session is now ready for network streaming. */ |
689 | session->net_handle = 1; | |
2f77fc4b DG |
690 | } |
691 | } | |
692 | ||
693 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
694 | && ksess->consumer->enabled) { | |
695 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
696 | socket, node.node) { | |
2f77fc4b | 697 | pthread_mutex_lock(socket->lock); |
6dc3064a | 698 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
699 | ksess->consumer, socket, |
700 | session->name, session->hostname, | |
701 | session->live_timer); | |
2f77fc4b | 702 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 703 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
704 | goto error; |
705 | } | |
6dc3064a DG |
706 | /* Session is now ready for network streaming. */ |
707 | session->net_handle = 1; | |
2f77fc4b DG |
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 */ | |
07b86b52 | 725 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
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 */ | |
07b86b52 | 734 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
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); | |
e43c41c5 | 758 | if (ret != 0) { |
9b6c7ec5 DG |
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 | ||
7972aab2 | 819 | ret = channel_ust_disable(usess, 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, | |
7972aab2 | 848 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
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); | |
7972aab2 | 856 | assert(domain); |
2f77fc4b DG |
857 | |
858 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
859 | ||
03b4fdcf DG |
860 | rcu_read_lock(); |
861 | ||
ecc48a90 JD |
862 | /* |
863 | * Don't try to enable a channel if the session has been started at | |
864 | * some point in time before. The tracer does not allow it. | |
865 | */ | |
866 | if (session->started) { | |
867 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
868 | goto error; | |
869 | } | |
870 | ||
871 | /* | |
872 | * If the session is a live session, remove the switch timer, the | |
873 | * live timer does the same thing but sends also synchronisation | |
874 | * beacons for inactive streams. | |
875 | */ | |
876 | if (session->live_timer > 0) { | |
877 | attr->attr.live_timer_interval = session->live_timer; | |
878 | attr->attr.switch_timer_interval = 0; | |
879 | } | |
880 | ||
7972aab2 | 881 | switch (domain->type) { |
2f77fc4b DG |
882 | case LTTNG_DOMAIN_KERNEL: |
883 | { | |
884 | struct ltt_kernel_channel *kchan; | |
885 | ||
2f77fc4b DG |
886 | kchan = trace_kernel_get_channel_by_name(attr->name, |
887 | session->kernel_session); | |
888 | if (kchan == NULL) { | |
4d2a627b MD |
889 | /* |
890 | * Don't try to create a channel if the session | |
891 | * has been started at some point in time | |
892 | * before. The tracer does not allow it. | |
893 | */ | |
894 | if (session->started) { | |
895 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
896 | goto error; | |
897 | } | |
2f77fc4b | 898 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); |
85076754 MD |
899 | if (attr->name[0] != '\0') { |
900 | session->kernel_session->has_non_default_channel = 1; | |
901 | } | |
2f77fc4b DG |
902 | } else { |
903 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
904 | } | |
905 | ||
f73fabfd | 906 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
907 | goto error; |
908 | } | |
909 | ||
784303b0 | 910 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
911 | break; |
912 | } | |
913 | case LTTNG_DOMAIN_UST: | |
914 | { | |
915 | struct ltt_ust_channel *uchan; | |
916 | ||
917 | chan_ht = usess->domain_global.channels; | |
918 | ||
919 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
920 | if (uchan == NULL) { | |
4d2a627b MD |
921 | /* |
922 | * Don't try to create a channel if the session | |
923 | * has been started at some point in time | |
924 | * before. The tracer does not allow it. | |
925 | */ | |
926 | if (session->started) { | |
927 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
928 | goto error; | |
929 | } | |
7972aab2 | 930 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
931 | if (attr->name[0] != '\0') { |
932 | usess->has_non_default_channel = 1; | |
933 | } | |
2f77fc4b | 934 | } else { |
7972aab2 | 935 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
936 | } |
937 | break; | |
938 | } | |
2f77fc4b | 939 | default: |
f73fabfd | 940 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
941 | goto error; |
942 | } | |
943 | ||
944 | error: | |
2223c96f | 945 | rcu_read_unlock(); |
2f77fc4b DG |
946 | return ret; |
947 | } | |
948 | ||
949 | ||
950 | /* | |
951 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
952 | */ | |
953 | int cmd_disable_event(struct ltt_session *session, int domain, | |
954 | char *channel_name, char *event_name) | |
955 | { | |
956 | int ret; | |
957 | ||
2223c96f DG |
958 | rcu_read_lock(); |
959 | ||
2f77fc4b DG |
960 | switch (domain) { |
961 | case LTTNG_DOMAIN_KERNEL: | |
962 | { | |
963 | struct ltt_kernel_channel *kchan; | |
964 | struct ltt_kernel_session *ksess; | |
965 | ||
966 | ksess = session->kernel_session; | |
967 | ||
85076754 MD |
968 | /* |
969 | * If a non-default channel has been created in the | |
970 | * session, explicitely require that -c chan_name needs | |
971 | * to be provided. | |
972 | */ | |
973 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
974 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
975 | goto error; | |
976 | } | |
977 | ||
2f77fc4b DG |
978 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
979 | if (kchan == NULL) { | |
f73fabfd | 980 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
981 | goto error; |
982 | } | |
983 | ||
d3a56674 | 984 | ret = event_kernel_disable_tracepoint(kchan, event_name); |
f73fabfd | 985 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
986 | goto error; |
987 | } | |
988 | ||
989 | kernel_wait_quiescent(kernel_tracer_fd); | |
990 | break; | |
991 | } | |
992 | case LTTNG_DOMAIN_UST: | |
993 | { | |
994 | struct ltt_ust_channel *uchan; | |
995 | struct ltt_ust_session *usess; | |
996 | ||
997 | usess = session->ust_session; | |
998 | ||
85076754 MD |
999 | /* |
1000 | * If a non-default channel has been created in the | |
1001 | * session, explicitely require that -c chan_name needs | |
1002 | * to be provided. | |
1003 | */ | |
1004 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1005 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1006 | goto error; | |
1007 | } | |
1008 | ||
2f77fc4b DG |
1009 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1010 | channel_name); | |
1011 | if (uchan == NULL) { | |
f73fabfd | 1012 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1013 | goto error; |
1014 | } | |
1015 | ||
7972aab2 | 1016 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
f73fabfd | 1017 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1018 | goto error; |
1019 | } | |
1020 | ||
1021 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1022 | channel_name); | |
1023 | break; | |
1024 | } | |
1025 | #if 0 | |
1026 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1027 | case LTTNG_DOMAIN_UST_PID: | |
1028 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1029 | #endif | |
1030 | default: | |
f73fabfd | 1031 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1032 | goto error; |
1033 | } | |
1034 | ||
f73fabfd | 1035 | ret = LTTNG_OK; |
2f77fc4b DG |
1036 | |
1037 | error: | |
2223c96f | 1038 | rcu_read_unlock(); |
2f77fc4b DG |
1039 | return ret; |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
1044 | */ | |
1045 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
1046 | char *channel_name) | |
1047 | { | |
1048 | int ret; | |
1049 | ||
2223c96f DG |
1050 | rcu_read_lock(); |
1051 | ||
2f77fc4b DG |
1052 | switch (domain) { |
1053 | case LTTNG_DOMAIN_KERNEL: | |
1054 | { | |
1055 | struct ltt_kernel_session *ksess; | |
1056 | struct ltt_kernel_channel *kchan; | |
1057 | ||
1058 | ksess = session->kernel_session; | |
1059 | ||
85076754 MD |
1060 | /* |
1061 | * If a non-default channel has been created in the | |
1062 | * session, explicitely require that -c chan_name needs | |
1063 | * to be provided. | |
1064 | */ | |
1065 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1066 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1067 | goto error; | |
1068 | } | |
1069 | ||
2f77fc4b DG |
1070 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1071 | if (kchan == NULL) { | |
f73fabfd | 1072 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1073 | goto error; |
1074 | } | |
1075 | ||
d3a56674 | 1076 | ret = event_kernel_disable_all(kchan); |
f73fabfd | 1077 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1078 | goto error; |
1079 | } | |
1080 | ||
1081 | kernel_wait_quiescent(kernel_tracer_fd); | |
1082 | break; | |
1083 | } | |
1084 | case LTTNG_DOMAIN_UST: | |
1085 | { | |
1086 | struct ltt_ust_session *usess; | |
1087 | struct ltt_ust_channel *uchan; | |
1088 | ||
1089 | usess = session->ust_session; | |
1090 | ||
85076754 MD |
1091 | /* |
1092 | * If a non-default channel has been created in the | |
1093 | * session, explicitely require that -c chan_name needs | |
1094 | * to be provided. | |
1095 | */ | |
1096 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1097 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1098 | goto error; | |
1099 | } | |
1100 | ||
2f77fc4b DG |
1101 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1102 | channel_name); | |
1103 | if (uchan == NULL) { | |
f73fabfd | 1104 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1105 | goto error; |
1106 | } | |
1107 | ||
7972aab2 | 1108 | ret = event_ust_disable_all_tracepoints(usess, uchan); |
2f77fc4b DG |
1109 | if (ret != 0) { |
1110 | goto error; | |
1111 | } | |
1112 | ||
1113 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1114 | ||
1115 | break; | |
1116 | } | |
1117 | #if 0 | |
1118 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1119 | case LTTNG_DOMAIN_UST_PID: | |
1120 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1121 | #endif | |
1122 | default: | |
f73fabfd | 1123 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1124 | goto error; |
1125 | } | |
1126 | ||
f73fabfd | 1127 | ret = LTTNG_OK; |
2f77fc4b DG |
1128 | |
1129 | error: | |
2223c96f | 1130 | rcu_read_unlock(); |
2f77fc4b DG |
1131 | return ret; |
1132 | } | |
1133 | ||
1134 | /* | |
1135 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1136 | */ | |
1137 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1138 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1139 | { |
d5979e4a | 1140 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1141 | |
1142 | switch (domain) { | |
1143 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1144 | assert(session->kernel_session); |
1145 | ||
1146 | if (session->kernel_session->channel_count == 0) { | |
1147 | /* Create default channel */ | |
1148 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1149 | if (ret != LTTNG_OK) { | |
1150 | goto error; | |
1151 | } | |
d5979e4a | 1152 | chan_kern_created = 1; |
979e618e | 1153 | } |
2f77fc4b | 1154 | /* Add kernel context to kernel tracer */ |
601d5acf | 1155 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1156 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1157 | goto error; |
1158 | } | |
1159 | break; | |
1160 | case LTTNG_DOMAIN_UST: | |
1161 | { | |
1162 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1163 | unsigned int chan_count; |
1164 | ||
2f77fc4b DG |
1165 | assert(usess); |
1166 | ||
85076754 | 1167 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1168 | if (chan_count == 0) { |
1169 | struct lttng_channel *attr; | |
1170 | /* Create default channel */ | |
0a9c6494 | 1171 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1172 | if (attr == NULL) { |
1173 | ret = LTTNG_ERR_FATAL; | |
1174 | goto error; | |
1175 | } | |
1176 | ||
7972aab2 | 1177 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1178 | if (ret != LTTNG_OK) { |
1179 | free(attr); | |
1180 | goto error; | |
1181 | } | |
1182 | free(attr); | |
d5979e4a | 1183 | chan_ust_created = 1; |
979e618e DG |
1184 | } |
1185 | ||
601d5acf | 1186 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1187 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1188 | goto error; |
1189 | } | |
1190 | break; | |
1191 | } | |
1192 | #if 0 | |
1193 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1194 | case LTTNG_DOMAIN_UST_PID: | |
1195 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1196 | #endif | |
1197 | default: | |
f73fabfd | 1198 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1199 | goto error; |
1200 | } | |
1201 | ||
d5979e4a | 1202 | return LTTNG_OK; |
2f77fc4b DG |
1203 | |
1204 | error: | |
d5979e4a DG |
1205 | if (chan_kern_created) { |
1206 | struct ltt_kernel_channel *kchan = | |
1207 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1208 | session->kernel_session); | |
1209 | /* Created previously, this should NOT fail. */ | |
1210 | assert(kchan); | |
1211 | kernel_destroy_channel(kchan); | |
1212 | } | |
1213 | ||
1214 | if (chan_ust_created) { | |
1215 | struct ltt_ust_channel *uchan = | |
1216 | trace_ust_find_channel_by_name( | |
1217 | session->ust_session->domain_global.channels, | |
1218 | DEFAULT_CHANNEL_NAME); | |
1219 | /* Created previously, this should NOT fail. */ | |
1220 | assert(uchan); | |
1221 | /* Remove from the channel list of the session. */ | |
1222 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1223 | uchan); | |
1224 | trace_ust_destroy_channel(uchan); | |
1225 | } | |
2f77fc4b DG |
1226 | return ret; |
1227 | } | |
1228 | ||
2f77fc4b DG |
1229 | /* |
1230 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1231 | */ | |
7972aab2 | 1232 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 DG |
1233 | char *channel_name, struct lttng_event *event, |
1234 | struct lttng_filter_bytecode *filter, int wpipe) | |
2f77fc4b | 1235 | { |
e5f5db7f | 1236 | int ret, channel_created = 0; |
2f77fc4b DG |
1237 | struct lttng_channel *attr; |
1238 | ||
1239 | assert(session); | |
1240 | assert(event); | |
1241 | assert(channel_name); | |
1242 | ||
2223c96f DG |
1243 | rcu_read_lock(); |
1244 | ||
7972aab2 | 1245 | switch (domain->type) { |
2f77fc4b DG |
1246 | case LTTNG_DOMAIN_KERNEL: |
1247 | { | |
1248 | struct ltt_kernel_channel *kchan; | |
1249 | ||
85076754 MD |
1250 | /* |
1251 | * If a non-default channel has been created in the | |
1252 | * session, explicitely require that -c chan_name needs | |
1253 | * to be provided. | |
1254 | */ | |
1255 | if (session->kernel_session->has_non_default_channel | |
1256 | && channel_name[0] == '\0') { | |
1257 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1258 | goto error; | |
1259 | } | |
1260 | ||
2f77fc4b DG |
1261 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1262 | session->kernel_session); | |
1263 | if (kchan == NULL) { | |
0a9c6494 DG |
1264 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1265 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1266 | if (attr == NULL) { |
f73fabfd | 1267 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1268 | goto error; |
1269 | } | |
1270 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1271 | ||
1272 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1273 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1274 | free(attr); |
1275 | goto error; | |
1276 | } | |
1277 | free(attr); | |
e5f5db7f DG |
1278 | |
1279 | channel_created = 1; | |
2f77fc4b DG |
1280 | } |
1281 | ||
1282 | /* Get the newly created kernel channel pointer */ | |
1283 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1284 | session->kernel_session); | |
1285 | if (kchan == NULL) { | |
1286 | /* This sould not happen... */ | |
f73fabfd | 1287 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1288 | goto error; |
1289 | } | |
1290 | ||
d3a56674 | 1291 | ret = event_kernel_enable_tracepoint(kchan, event); |
f73fabfd | 1292 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1293 | if (channel_created) { |
1294 | /* Let's not leak a useless channel. */ | |
1295 | kernel_destroy_channel(kchan); | |
1296 | } | |
2f77fc4b DG |
1297 | goto error; |
1298 | } | |
1299 | ||
1300 | kernel_wait_quiescent(kernel_tracer_fd); | |
1301 | break; | |
1302 | } | |
1303 | case LTTNG_DOMAIN_UST: | |
1304 | { | |
1305 | struct ltt_ust_channel *uchan; | |
1306 | struct ltt_ust_session *usess = session->ust_session; | |
1307 | ||
1308 | assert(usess); | |
1309 | ||
85076754 MD |
1310 | /* |
1311 | * If a non-default channel has been created in the | |
1312 | * session, explicitely require that -c chan_name needs | |
1313 | * to be provided. | |
1314 | */ | |
1315 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1316 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1317 | goto error; | |
1318 | } | |
1319 | ||
2f77fc4b DG |
1320 | /* Get channel from global UST domain */ |
1321 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1322 | channel_name); | |
1323 | if (uchan == NULL) { | |
1324 | /* Create default channel */ | |
0a9c6494 DG |
1325 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1326 | usess->buffer_type); | |
2f77fc4b | 1327 | if (attr == NULL) { |
f73fabfd | 1328 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1329 | goto error; |
1330 | } | |
1331 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1332 | ||
1333 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1334 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1335 | free(attr); |
1336 | goto error; | |
1337 | } | |
1338 | free(attr); | |
1339 | ||
1340 | /* Get the newly created channel reference back */ | |
1341 | uchan = trace_ust_find_channel_by_name( | |
1342 | usess->domain_global.channels, channel_name); | |
1343 | assert(uchan); | |
1344 | } | |
1345 | ||
1346 | /* At this point, the session and channel exist on the tracer */ | |
7972aab2 | 1347 | ret = event_ust_enable_tracepoint(usess, uchan, event, filter); |
f73fabfd | 1348 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1349 | goto error; |
1350 | } | |
1351 | break; | |
1352 | } | |
1353 | #if 0 | |
1354 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1355 | case LTTNG_DOMAIN_UST_PID: | |
1356 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1357 | #endif | |
1358 | default: | |
f73fabfd | 1359 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1360 | goto error; |
1361 | } | |
1362 | ||
f73fabfd | 1363 | ret = LTTNG_OK; |
2f77fc4b DG |
1364 | |
1365 | error: | |
2223c96f | 1366 | rcu_read_unlock(); |
2f77fc4b DG |
1367 | return ret; |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1372 | */ | |
7972aab2 DG |
1373 | int cmd_enable_event_all(struct ltt_session *session, |
1374 | struct lttng_domain *domain, char *channel_name, int event_type, | |
025faf73 | 1375 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1376 | { |
1377 | int ret; | |
1378 | struct lttng_channel *attr; | |
1379 | ||
1380 | assert(session); | |
1381 | assert(channel_name); | |
1382 | ||
2223c96f DG |
1383 | rcu_read_lock(); |
1384 | ||
7972aab2 | 1385 | switch (domain->type) { |
2f77fc4b DG |
1386 | case LTTNG_DOMAIN_KERNEL: |
1387 | { | |
1388 | struct ltt_kernel_channel *kchan; | |
1389 | ||
1390 | assert(session->kernel_session); | |
1391 | ||
85076754 MD |
1392 | /* |
1393 | * If a non-default channel has been created in the | |
1394 | * session, explicitely require that -c chan_name needs | |
1395 | * to be provided. | |
1396 | */ | |
1397 | if (session->kernel_session->has_non_default_channel | |
1398 | && channel_name[0] == '\0') { | |
1399 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1400 | goto error; | |
1401 | } | |
1402 | ||
2f77fc4b DG |
1403 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1404 | session->kernel_session); | |
1405 | if (kchan == NULL) { | |
1406 | /* Create default channel */ | |
0a9c6494 DG |
1407 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1408 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1409 | if (attr == NULL) { |
f73fabfd | 1410 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1411 | goto error; |
1412 | } | |
1413 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1414 | ||
1415 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1416 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1417 | free(attr); |
1418 | goto error; | |
1419 | } | |
1420 | free(attr); | |
1421 | ||
1422 | /* Get the newly created kernel channel pointer */ | |
1423 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1424 | session->kernel_session); | |
1425 | assert(kchan); | |
1426 | } | |
1427 | ||
1428 | switch (event_type) { | |
1429 | case LTTNG_EVENT_SYSCALL: | |
d3a56674 | 1430 | ret = event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1431 | break; |
1432 | case LTTNG_EVENT_TRACEPOINT: | |
1433 | /* | |
1434 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1435 | * events already registered to the channel. | |
1436 | */ | |
d3a56674 | 1437 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1438 | break; |
1439 | case LTTNG_EVENT_ALL: | |
1440 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1441 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1442 | break; |
1443 | default: | |
f73fabfd | 1444 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1445 | goto error; |
1446 | } | |
1447 | ||
1448 | /* Manage return value */ | |
f73fabfd | 1449 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1450 | /* |
1451 | * On error, cmd_enable_channel call will take care of destroying | |
1452 | * the created channel if it was needed. | |
1453 | */ | |
2f77fc4b DG |
1454 | goto error; |
1455 | } | |
1456 | ||
1457 | kernel_wait_quiescent(kernel_tracer_fd); | |
1458 | break; | |
1459 | } | |
1460 | case LTTNG_DOMAIN_UST: | |
1461 | { | |
1462 | struct ltt_ust_channel *uchan; | |
1463 | struct ltt_ust_session *usess = session->ust_session; | |
1464 | ||
1465 | assert(usess); | |
1466 | ||
85076754 MD |
1467 | /* |
1468 | * If a non-default channel has been created in the | |
1469 | * session, explicitely require that -c chan_name needs | |
1470 | * to be provided. | |
1471 | */ | |
1472 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1473 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1474 | goto error; | |
1475 | } | |
1476 | ||
2f77fc4b DG |
1477 | /* Get channel from global UST domain */ |
1478 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1479 | channel_name); | |
1480 | if (uchan == NULL) { | |
1481 | /* Create default channel */ | |
0a9c6494 DG |
1482 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1483 | usess->buffer_type); | |
2f77fc4b | 1484 | if (attr == NULL) { |
f73fabfd | 1485 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1486 | goto error; |
1487 | } | |
1488 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1489 | ||
1490 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1491 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1492 | free(attr); |
1493 | goto error; | |
1494 | } | |
1495 | free(attr); | |
1496 | ||
1497 | /* Get the newly created channel reference back */ | |
1498 | uchan = trace_ust_find_channel_by_name( | |
1499 | usess->domain_global.channels, channel_name); | |
1500 | assert(uchan); | |
1501 | } | |
1502 | ||
1503 | /* At this point, the session and channel exist on the tracer */ | |
1504 | ||
1505 | switch (event_type) { | |
1506 | case LTTNG_EVENT_ALL: | |
1507 | case LTTNG_EVENT_TRACEPOINT: | |
7972aab2 | 1508 | ret = event_ust_enable_all_tracepoints(usess, uchan, filter); |
f73fabfd | 1509 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1510 | goto error; |
1511 | } | |
1512 | break; | |
1513 | default: | |
f73fabfd | 1514 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1515 | goto error; |
1516 | } | |
1517 | ||
1518 | /* Manage return value */ | |
f73fabfd | 1519 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1520 | goto error; |
1521 | } | |
1522 | ||
1523 | break; | |
1524 | } | |
1525 | #if 0 | |
1526 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1527 | case LTTNG_DOMAIN_UST_PID: | |
1528 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1529 | #endif | |
1530 | default: | |
f73fabfd | 1531 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1532 | goto error; |
1533 | } | |
1534 | ||
f73fabfd | 1535 | ret = LTTNG_OK; |
2f77fc4b DG |
1536 | |
1537 | error: | |
2223c96f | 1538 | rcu_read_unlock(); |
2f77fc4b DG |
1539 | return ret; |
1540 | } | |
1541 | ||
1542 | ||
1543 | /* | |
1544 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1545 | */ | |
1546 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1547 | { | |
1548 | int ret; | |
1549 | ssize_t nb_events = 0; | |
1550 | ||
1551 | switch (domain) { | |
1552 | case LTTNG_DOMAIN_KERNEL: | |
1553 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1554 | if (nb_events < 0) { | |
f73fabfd | 1555 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1556 | goto error; |
1557 | } | |
1558 | break; | |
1559 | case LTTNG_DOMAIN_UST: | |
1560 | nb_events = ust_app_list_events(events); | |
1561 | if (nb_events < 0) { | |
f73fabfd | 1562 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1563 | goto error; |
1564 | } | |
1565 | break; | |
1566 | default: | |
f73fabfd | 1567 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1568 | goto error; |
1569 | } | |
1570 | ||
1571 | return nb_events; | |
1572 | ||
1573 | error: | |
1574 | /* Return negative value to differentiate return code */ | |
1575 | return -ret; | |
1576 | } | |
1577 | ||
1578 | /* | |
1579 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1580 | */ | |
1581 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1582 | struct lttng_event_field **fields) | |
1583 | { | |
1584 | int ret; | |
1585 | ssize_t nb_fields = 0; | |
1586 | ||
1587 | switch (domain) { | |
1588 | case LTTNG_DOMAIN_UST: | |
1589 | nb_fields = ust_app_list_event_fields(fields); | |
1590 | if (nb_fields < 0) { | |
f73fabfd | 1591 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1592 | goto error; |
1593 | } | |
1594 | break; | |
1595 | case LTTNG_DOMAIN_KERNEL: | |
1596 | default: /* fall-through */ | |
f73fabfd | 1597 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1598 | goto error; |
1599 | } | |
1600 | ||
1601 | return nb_fields; | |
1602 | ||
1603 | error: | |
1604 | /* Return negative value to differentiate return code */ | |
1605 | return -ret; | |
1606 | } | |
1607 | ||
1608 | /* | |
1609 | * Command LTTNG_START_TRACE processed by the client thread. | |
1610 | */ | |
1611 | int cmd_start_trace(struct ltt_session *session) | |
1612 | { | |
1613 | int ret; | |
1614 | struct ltt_kernel_session *ksession; | |
1615 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1616 | |
1617 | assert(session); | |
1618 | ||
1619 | /* Ease our life a bit ;) */ | |
1620 | ksession = session->kernel_session; | |
1621 | usess = session->ust_session; | |
1622 | ||
1623 | if (session->enabled) { | |
1624 | /* Already started. */ | |
f73fabfd | 1625 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1626 | goto error; |
1627 | } | |
1628 | ||
1629 | session->enabled = 1; | |
1630 | ||
2f77fc4b DG |
1631 | /* Kernel tracing */ |
1632 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1633 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1634 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1635 | goto error; |
1636 | } | |
2f77fc4b DG |
1637 | } |
1638 | ||
1639 | /* Flag session that trace should start automatically */ | |
1640 | if (usess) { | |
1641 | usess->start_trace = 1; | |
1642 | ||
1643 | ret = ust_app_start_trace_all(usess); | |
1644 | if (ret < 0) { | |
f73fabfd | 1645 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1646 | goto error; |
1647 | } | |
1648 | } | |
1649 | ||
9b6c7ec5 DG |
1650 | session->started = 1; |
1651 | ||
f73fabfd | 1652 | ret = LTTNG_OK; |
2f77fc4b DG |
1653 | |
1654 | error: | |
1655 | return ret; | |
1656 | } | |
1657 | ||
1658 | /* | |
1659 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1660 | */ | |
1661 | int cmd_stop_trace(struct ltt_session *session) | |
1662 | { | |
1663 | int ret; | |
1664 | struct ltt_kernel_channel *kchan; | |
1665 | struct ltt_kernel_session *ksession; | |
1666 | struct ltt_ust_session *usess; | |
1667 | ||
1668 | assert(session); | |
1669 | ||
1670 | /* Short cut */ | |
1671 | ksession = session->kernel_session; | |
1672 | usess = session->ust_session; | |
1673 | ||
1674 | if (!session->enabled) { | |
f73fabfd | 1675 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1676 | goto error; |
1677 | } | |
1678 | ||
1679 | session->enabled = 0; | |
1680 | ||
1681 | /* Kernel tracer */ | |
d39829a1 | 1682 | if (ksession && ksession->started) { |
2f77fc4b DG |
1683 | DBG("Stop kernel tracing"); |
1684 | ||
1685 | /* Flush metadata if exist */ | |
1686 | if (ksession->metadata_stream_fd >= 0) { | |
1687 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1688 | if (ret < 0) { | |
1689 | ERR("Kernel metadata flush failed"); | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | /* Flush all buffers before stopping */ | |
1694 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1695 | ret = kernel_flush_buffer(kchan); | |
1696 | if (ret < 0) { | |
1697 | ERR("Kernel flush buffer error"); | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | ret = kernel_stop_session(ksession); | |
1702 | if (ret < 0) { | |
f73fabfd | 1703 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1704 | goto error; |
1705 | } | |
1706 | ||
1707 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 DG |
1708 | |
1709 | ksession->started = 0; | |
2f77fc4b DG |
1710 | } |
1711 | ||
d39829a1 | 1712 | if (usess && usess->start_trace) { |
2f77fc4b DG |
1713 | usess->start_trace = 0; |
1714 | ||
1715 | ret = ust_app_stop_trace_all(usess); | |
1716 | if (ret < 0) { | |
f73fabfd | 1717 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1718 | goto error; |
1719 | } | |
1720 | } | |
1721 | ||
f73fabfd | 1722 | ret = LTTNG_OK; |
2f77fc4b DG |
1723 | |
1724 | error: | |
1725 | return ret; | |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1730 | */ | |
1731 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1732 | size_t nb_uri, struct lttng_uri *uris) | |
1733 | { | |
1734 | int ret, i; | |
1735 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1736 | struct ltt_ust_session *usess = session->ust_session; | |
1737 | struct consumer_output *consumer = NULL; | |
1738 | ||
1739 | assert(session); | |
1740 | assert(uris); | |
1741 | assert(nb_uri > 0); | |
1742 | ||
1743 | /* Can't enable consumer after session started. */ | |
1744 | if (session->enabled) { | |
f73fabfd | 1745 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1746 | goto error; |
1747 | } | |
1748 | ||
2f77fc4b DG |
1749 | /* |
1750 | * This case switch makes sure the domain session has a temporary consumer | |
1751 | * so the URL can be set. | |
1752 | */ | |
1753 | switch (domain) { | |
1754 | case 0: | |
1755 | /* Code flow error. A session MUST always have a consumer object */ | |
1756 | assert(session->consumer); | |
1757 | /* | |
1758 | * The URL will be added to the tracing session consumer instead of a | |
1759 | * specific domain consumer. | |
1760 | */ | |
1761 | consumer = session->consumer; | |
1762 | break; | |
1763 | case LTTNG_DOMAIN_KERNEL: | |
1764 | /* Code flow error if we don't have a kernel session here. */ | |
1765 | assert(ksess); | |
785d2d0d DG |
1766 | assert(ksess->consumer); |
1767 | consumer = ksess->consumer; | |
2f77fc4b DG |
1768 | break; |
1769 | case LTTNG_DOMAIN_UST: | |
1770 | /* Code flow error if we don't have a kernel session here. */ | |
1771 | assert(usess); | |
785d2d0d DG |
1772 | assert(usess->consumer); |
1773 | consumer = usess->consumer; | |
2f77fc4b DG |
1774 | break; |
1775 | } | |
1776 | ||
1777 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b | 1778 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
a74934ba | 1779 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1780 | goto error; |
1781 | } | |
2f77fc4b DG |
1782 | } |
1783 | ||
1784 | /* All good! */ | |
f73fabfd | 1785 | ret = LTTNG_OK; |
2f77fc4b DG |
1786 | |
1787 | error: | |
1788 | return ret; | |
1789 | } | |
1790 | ||
1791 | /* | |
1792 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1793 | */ | |
1794 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 1795 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
1796 | { |
1797 | int ret; | |
2f77fc4b DG |
1798 | struct ltt_session *session; |
1799 | ||
1800 | assert(name); | |
2bba9e53 | 1801 | assert(creds); |
785d2d0d | 1802 | |
2f77fc4b DG |
1803 | /* |
1804 | * Verify if the session already exist | |
1805 | * | |
1806 | * XXX: There is no need for the session lock list here since the caller | |
1807 | * (process_client_msg) is holding it. We might want to change that so a | |
1808 | * single command does not lock the entire session list. | |
1809 | */ | |
1810 | session = session_find_by_name(name); | |
1811 | if (session != NULL) { | |
f73fabfd | 1812 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
1813 | goto find_error; |
1814 | } | |
1815 | ||
1816 | /* Create tracing session in the registry */ | |
dec56f6c | 1817 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 1818 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 1819 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1820 | goto session_error; |
1821 | } | |
1822 | ||
1823 | /* | |
1824 | * Get the newly created session pointer back | |
1825 | * | |
1826 | * XXX: There is no need for the session lock list here since the caller | |
1827 | * (process_client_msg) is holding it. We might want to change that so a | |
1828 | * single command does not lock the entire session list. | |
1829 | */ | |
1830 | session = session_find_by_name(name); | |
1831 | assert(session); | |
1832 | ||
ecc48a90 | 1833 | session->live_timer = live_timer; |
2f77fc4b DG |
1834 | /* Create default consumer output for the session not yet created. */ |
1835 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
1836 | if (session->consumer == NULL) { | |
f73fabfd | 1837 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1838 | goto consumer_error; |
1839 | } | |
1840 | ||
2bba9e53 DG |
1841 | if (uris) { |
1842 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
1843 | if (ret != LTTNG_OK) { | |
1844 | goto consumer_error; | |
1845 | } | |
1846 | session->output_traces = 1; | |
1847 | } else { | |
1848 | session->output_traces = 0; | |
1849 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
1850 | } |
1851 | ||
1852 | session->consumer->enabled = 1; | |
1853 | ||
f73fabfd | 1854 | return LTTNG_OK; |
2f77fc4b DG |
1855 | |
1856 | consumer_error: | |
1857 | session_destroy(session); | |
1858 | session_error: | |
1859 | find_error: | |
1860 | return ret; | |
1861 | } | |
1862 | ||
27babd3a DG |
1863 | /* |
1864 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
1865 | */ | |
1866 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
1867 | size_t nb_uri, lttng_sock_cred *creds) | |
1868 | { | |
1869 | int ret; | |
1870 | struct ltt_session *session; | |
1871 | struct snapshot_output *new_output = NULL; | |
1872 | ||
1873 | assert(name); | |
1874 | assert(creds); | |
1875 | ||
1876 | /* | |
1877 | * Create session in no output mode with URIs set to NULL. The uris we've | |
1878 | * received are for a default snapshot output if one. | |
1879 | */ | |
ecc48a90 | 1880 | ret = cmd_create_session_uri(name, NULL, 0, creds, -1); |
27babd3a DG |
1881 | if (ret != LTTNG_OK) { |
1882 | goto error; | |
1883 | } | |
1884 | ||
1885 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
1886 | session = session_find_by_name(name); | |
1887 | assert(session); | |
1888 | ||
1889 | /* Flag session for snapshot mode. */ | |
1890 | session->snapshot_mode = 1; | |
1891 | ||
1892 | /* Skip snapshot output creation if no URI is given. */ | |
1893 | if (nb_uri == 0) { | |
1894 | goto end; | |
1895 | } | |
1896 | ||
1897 | new_output = snapshot_output_alloc(); | |
1898 | if (!new_output) { | |
1899 | ret = LTTNG_ERR_NOMEM; | |
1900 | goto error_snapshot_alloc; | |
1901 | } | |
1902 | ||
1903 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
1904 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
1905 | if (ret < 0) { | |
1906 | if (ret == -ENOMEM) { | |
1907 | ret = LTTNG_ERR_NOMEM; | |
1908 | } else { | |
1909 | ret = LTTNG_ERR_INVALID; | |
1910 | } | |
1911 | goto error_snapshot; | |
1912 | } | |
1913 | ||
1914 | rcu_read_lock(); | |
1915 | snapshot_add_output(&session->snapshot, new_output); | |
1916 | rcu_read_unlock(); | |
1917 | ||
1918 | end: | |
1919 | return LTTNG_OK; | |
1920 | ||
1921 | error_snapshot: | |
1922 | snapshot_output_destroy(new_output); | |
1923 | error_snapshot_alloc: | |
1924 | session_destroy(session); | |
1925 | error: | |
1926 | return ret; | |
1927 | } | |
1928 | ||
2f77fc4b DG |
1929 | /* |
1930 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
1931 | */ | |
1932 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
1933 | { | |
1934 | int ret; | |
1935 | struct ltt_ust_session *usess; | |
1936 | struct ltt_kernel_session *ksess; | |
1937 | ||
1938 | /* Safety net */ | |
1939 | assert(session); | |
1940 | ||
1941 | usess = session->ust_session; | |
1942 | ksess = session->kernel_session; | |
1943 | ||
1944 | /* Clean kernel session teardown */ | |
1945 | kernel_destroy_session(ksess); | |
1946 | ||
1947 | /* UST session teardown */ | |
1948 | if (usess) { | |
1949 | /* Close any relayd session */ | |
1950 | consumer_output_send_destroy_relayd(usess->consumer); | |
1951 | ||
1952 | /* Destroy every UST application related to this session. */ | |
1953 | ret = ust_app_destroy_trace_all(usess); | |
1954 | if (ret) { | |
1955 | ERR("Error in ust_app_destroy_trace_all"); | |
1956 | } | |
1957 | ||
1958 | /* Clean up the rest. */ | |
1959 | trace_ust_destroy_session(usess); | |
1960 | } | |
1961 | ||
1962 | /* | |
1963 | * Must notify the kernel thread here to update it's poll set in order to | |
1964 | * remove the channel(s)' fd just destroyed. | |
1965 | */ | |
1966 | ret = notify_thread_pipe(wpipe); | |
1967 | if (ret < 0) { | |
1968 | PERROR("write kernel poll pipe"); | |
1969 | } | |
1970 | ||
1971 | ret = session_destroy(session); | |
1972 | ||
1973 | return ret; | |
1974 | } | |
1975 | ||
1976 | /* | |
1977 | * Command LTTNG_CALIBRATE processed by the client thread. | |
1978 | */ | |
1979 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
1980 | { | |
1981 | int ret; | |
1982 | ||
1983 | switch (domain) { | |
1984 | case LTTNG_DOMAIN_KERNEL: | |
1985 | { | |
1986 | struct lttng_kernel_calibrate kcalibrate; | |
1987 | ||
1988 | kcalibrate.type = calibrate->type; | |
1989 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
1990 | if (ret < 0) { | |
f73fabfd | 1991 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1992 | goto error; |
1993 | } | |
1994 | break; | |
1995 | } | |
1996 | case LTTNG_DOMAIN_UST: | |
1997 | { | |
1998 | struct lttng_ust_calibrate ucalibrate; | |
1999 | ||
2000 | ucalibrate.type = calibrate->type; | |
2001 | ret = ust_app_calibrate_glb(&ucalibrate); | |
2002 | if (ret < 0) { | |
f73fabfd | 2003 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2004 | goto error; |
2005 | } | |
2006 | break; | |
2007 | } | |
2008 | default: | |
f73fabfd | 2009 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2010 | goto error; |
2011 | } | |
2012 | ||
f73fabfd | 2013 | ret = LTTNG_OK; |
2f77fc4b DG |
2014 | |
2015 | error: | |
2016 | return ret; | |
2017 | } | |
2018 | ||
2019 | /* | |
2020 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2021 | */ | |
2022 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2023 | const char *sock_path, struct consumer_data *cdata) | |
2024 | { | |
2025 | int ret, sock; | |
dd81b457 | 2026 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2027 | |
2028 | assert(session); | |
2029 | assert(cdata); | |
2030 | assert(sock_path); | |
2031 | ||
2032 | switch (domain) { | |
2033 | case LTTNG_DOMAIN_KERNEL: | |
2034 | { | |
2035 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2036 | ||
2037 | assert(ksess); | |
2038 | ||
2039 | /* Can't register a consumer if there is already one */ | |
2040 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2041 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2042 | goto error; |
2043 | } | |
2044 | ||
2045 | sock = lttcomm_connect_unix_sock(sock_path); | |
2046 | if (sock < 0) { | |
f73fabfd | 2047 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2048 | goto error; |
2049 | } | |
4ce514c4 | 2050 | cdata->cmd_sock = sock; |
2f77fc4b | 2051 | |
4ce514c4 | 2052 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2053 | if (socket == NULL) { |
f66c074c DG |
2054 | ret = close(sock); |
2055 | if (ret < 0) { | |
2056 | PERROR("close register consumer"); | |
2057 | } | |
4ce514c4 | 2058 | cdata->cmd_sock = -1; |
f73fabfd | 2059 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2060 | goto error; |
2061 | } | |
2062 | ||
2063 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2064 | if (socket->lock == NULL) { | |
2065 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2066 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2067 | goto error; |
2068 | } | |
2069 | pthread_mutex_init(socket->lock, NULL); | |
2070 | socket->registered = 1; | |
2071 | ||
2072 | rcu_read_lock(); | |
2073 | consumer_add_socket(socket, ksess->consumer); | |
2074 | rcu_read_unlock(); | |
2075 | ||
2076 | pthread_mutex_lock(&cdata->pid_mutex); | |
2077 | cdata->pid = -1; | |
2078 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2079 | ||
2080 | break; | |
2081 | } | |
2082 | default: | |
2083 | /* TODO: Userspace tracing */ | |
f73fabfd | 2084 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2085 | goto error; |
2086 | } | |
2087 | ||
dd81b457 | 2088 | return LTTNG_OK; |
2f77fc4b DG |
2089 | |
2090 | error: | |
dd81b457 DG |
2091 | if (socket) { |
2092 | consumer_destroy_socket(socket); | |
2093 | } | |
2f77fc4b DG |
2094 | return ret; |
2095 | } | |
2096 | ||
2097 | /* | |
2098 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2099 | */ | |
2100 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2101 | struct lttng_domain **domains) | |
2102 | { | |
2103 | int ret, index = 0; | |
2104 | ssize_t nb_dom = 0; | |
2105 | ||
2106 | if (session->kernel_session != NULL) { | |
2107 | DBG3("Listing domains found kernel domain"); | |
2108 | nb_dom++; | |
2109 | } | |
2110 | ||
2111 | if (session->ust_session != NULL) { | |
2112 | DBG3("Listing domains found UST global domain"); | |
2113 | nb_dom++; | |
2114 | } | |
2115 | ||
2116 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
2117 | if (*domains == NULL) { | |
f73fabfd | 2118 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2119 | goto error; |
2120 | } | |
2121 | ||
2122 | if (session->kernel_session != NULL) { | |
2123 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
2124 | index++; | |
2125 | } | |
2126 | ||
2127 | if (session->ust_session != NULL) { | |
2128 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2129 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b DG |
2130 | index++; |
2131 | } | |
2132 | ||
2133 | return nb_dom; | |
2134 | ||
2135 | error: | |
f73fabfd DG |
2136 | /* Return negative value to differentiate return code */ |
2137 | return -ret; | |
2f77fc4b DG |
2138 | } |
2139 | ||
2140 | ||
2141 | /* | |
2142 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2143 | */ | |
2144 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2145 | struct lttng_channel **channels) | |
2146 | { | |
2147 | int ret; | |
2148 | ssize_t nb_chan = 0; | |
2149 | ||
2150 | switch (domain) { | |
2151 | case LTTNG_DOMAIN_KERNEL: | |
2152 | if (session->kernel_session != NULL) { | |
2153 | nb_chan = session->kernel_session->channel_count; | |
2154 | } | |
2155 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2156 | if (nb_chan <= 0) { |
2157 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2158 | } | |
2f77fc4b DG |
2159 | break; |
2160 | case LTTNG_DOMAIN_UST: | |
2161 | if (session->ust_session != NULL) { | |
2162 | nb_chan = lttng_ht_get_count( | |
2163 | session->ust_session->domain_global.channels); | |
2164 | } | |
2165 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
2166 | if (nb_chan <= 0) { |
2167 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2168 | } | |
2f77fc4b DG |
2169 | break; |
2170 | default: | |
2171 | *channels = NULL; | |
f73fabfd | 2172 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2173 | goto error; |
2174 | } | |
2175 | ||
2176 | if (nb_chan > 0) { | |
2177 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2178 | if (*channels == NULL) { | |
f73fabfd | 2179 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2180 | goto error; |
2181 | } | |
2182 | ||
2183 | list_lttng_channels(domain, session, *channels); | |
2184 | } else { | |
2185 | *channels = NULL; | |
c7d620a2 DG |
2186 | /* Ret value was set in the domain switch case */ |
2187 | goto error; | |
2f77fc4b DG |
2188 | } |
2189 | ||
2190 | return nb_chan; | |
2191 | ||
2192 | error: | |
f73fabfd DG |
2193 | /* Return negative value to differentiate return code */ |
2194 | return -ret; | |
2f77fc4b DG |
2195 | } |
2196 | ||
2197 | /* | |
2198 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2199 | */ | |
2200 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2201 | char *channel_name, struct lttng_event **events) | |
2202 | { | |
2203 | int ret = 0; | |
2204 | ssize_t nb_event = 0; | |
2205 | ||
2206 | switch (domain) { | |
2207 | case LTTNG_DOMAIN_KERNEL: | |
2208 | if (session->kernel_session != NULL) { | |
2209 | nb_event = list_lttng_kernel_events(channel_name, | |
2210 | session->kernel_session, events); | |
2211 | } | |
2212 | break; | |
2213 | case LTTNG_DOMAIN_UST: | |
2214 | { | |
2215 | if (session->ust_session != NULL) { | |
2216 | nb_event = list_lttng_ust_global_events(channel_name, | |
2217 | &session->ust_session->domain_global, events); | |
2218 | } | |
2219 | break; | |
2220 | } | |
2221 | default: | |
f73fabfd | 2222 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2223 | goto error; |
2224 | } | |
2225 | ||
f73fabfd | 2226 | return nb_event; |
2f77fc4b DG |
2227 | |
2228 | error: | |
f73fabfd DG |
2229 | /* Return negative value to differentiate return code */ |
2230 | return -ret; | |
2f77fc4b DG |
2231 | } |
2232 | ||
2233 | /* | |
2234 | * Using the session list, filled a lttng_session array to send back to the | |
2235 | * client for session listing. | |
2236 | * | |
2237 | * The session list lock MUST be acquired before calling this function. Use | |
2238 | * session_lock_list() and session_unlock_list(). | |
2239 | */ | |
2240 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2241 | gid_t gid) | |
2242 | { | |
2243 | int ret; | |
2244 | unsigned int i = 0; | |
2245 | struct ltt_session *session; | |
2246 | struct ltt_session_list *list = session_get_list(); | |
2247 | ||
2248 | DBG("Getting all available session for UID %d GID %d", | |
2249 | uid, gid); | |
2250 | /* | |
2251 | * Iterate over session list and append data after the control struct in | |
2252 | * the buffer. | |
2253 | */ | |
2254 | cds_list_for_each_entry(session, &list->head, list) { | |
2255 | /* | |
2256 | * Only list the sessions the user can control. | |
2257 | */ | |
2258 | if (!session_access_ok(session, uid, gid)) { | |
2259 | continue; | |
2260 | } | |
2261 | ||
2262 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2263 | struct ltt_ust_session *usess = session->ust_session; | |
2264 | ||
2265 | if (session->consumer->type == CONSUMER_DST_NET || | |
2266 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2267 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2268 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2269 | sizeof(sessions[i].path), session); |
2f77fc4b | 2270 | } else { |
dec56f6c | 2271 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2272 | session->consumer->dst.trace_path); |
2273 | } | |
2274 | if (ret < 0) { | |
2275 | PERROR("snprintf session path"); | |
2276 | continue; | |
2277 | } | |
2278 | ||
2279 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2280 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
2281 | sessions[i].enabled = session->enabled; | |
2cbf8fed | 2282 | sessions[i].snapshot_mode = session->snapshot_mode; |
2f77fc4b DG |
2283 | i++; |
2284 | } | |
2285 | } | |
2286 | ||
806e2684 | 2287 | /* |
6d805429 | 2288 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2289 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2290 | */ |
6d805429 | 2291 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2292 | { |
2293 | int ret; | |
2294 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2295 | struct ltt_ust_session *usess = session->ust_session; | |
2296 | ||
2297 | assert(session); | |
2298 | ||
2299 | /* Session MUST be stopped to ask for data availability. */ | |
2300 | if (session->enabled) { | |
2301 | ret = LTTNG_ERR_SESSION_STARTED; | |
2302 | goto error; | |
2303 | } | |
2304 | ||
2305 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2306 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2307 | if (ret == 1) { | |
806e2684 DG |
2308 | /* Data is still being extracted for the kernel. */ |
2309 | goto error; | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | if (usess && usess->consumer) { | |
6d805429 DG |
2314 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2315 | if (ret == 1) { | |
806e2684 DG |
2316 | /* Data is still being extracted for the kernel. */ |
2317 | goto error; | |
2318 | } | |
2319 | } | |
2320 | ||
2321 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2322 | ret = 0; |
806e2684 DG |
2323 | |
2324 | error: | |
2325 | return ret; | |
2326 | } | |
2327 | ||
6dc3064a DG |
2328 | /* |
2329 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2330 | * | |
2331 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2332 | */ | |
2333 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2334 | struct lttng_snapshot_output *output, uint32_t *id) | |
2335 | { | |
2336 | int ret; | |
2337 | struct snapshot_output *new_output; | |
2338 | ||
2339 | assert(session); | |
2340 | assert(output); | |
2341 | ||
2342 | DBG("Cmd snapshot add output for session %s", session->name); | |
2343 | ||
2344 | /* | |
d3f14b8a MD |
2345 | * Permission denied to create an output if the session is not |
2346 | * set in no output mode. | |
6dc3064a DG |
2347 | */ |
2348 | if (session->output_traces) { | |
2349 | ret = LTTNG_ERR_EPERM; | |
2350 | goto error; | |
2351 | } | |
2352 | ||
2353 | /* Only one output is allowed until we have the "tee" feature. */ | |
2354 | if (session->snapshot.nb_output == 1) { | |
2355 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2356 | goto error; | |
2357 | } | |
2358 | ||
2359 | new_output = snapshot_output_alloc(); | |
2360 | if (!new_output) { | |
2361 | ret = LTTNG_ERR_NOMEM; | |
2362 | goto error; | |
2363 | } | |
2364 | ||
2365 | ret = snapshot_output_init(output->max_size, output->name, | |
2366 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2367 | &session->snapshot); | |
2368 | if (ret < 0) { | |
2369 | if (ret == -ENOMEM) { | |
2370 | ret = LTTNG_ERR_NOMEM; | |
2371 | } else { | |
2372 | ret = LTTNG_ERR_INVALID; | |
2373 | } | |
2374 | goto free_error; | |
2375 | } | |
2376 | ||
6dc3064a DG |
2377 | rcu_read_lock(); |
2378 | snapshot_add_output(&session->snapshot, new_output); | |
2379 | if (id) { | |
2380 | *id = new_output->id; | |
2381 | } | |
2382 | rcu_read_unlock(); | |
2383 | ||
2384 | return LTTNG_OK; | |
2385 | ||
2386 | free_error: | |
2387 | snapshot_output_destroy(new_output); | |
2388 | error: | |
2389 | return ret; | |
2390 | } | |
2391 | ||
2392 | /* | |
2393 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2394 | * | |
2395 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2396 | */ | |
2397 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2398 | struct lttng_snapshot_output *output) | |
2399 | { | |
2400 | int ret; | |
eb240553 | 2401 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2402 | |
2403 | assert(session); | |
2404 | assert(output); | |
2405 | ||
6dc3064a DG |
2406 | rcu_read_lock(); |
2407 | ||
2408 | /* | |
d3f14b8a MD |
2409 | * Permission denied to create an output if the session is not |
2410 | * set in no output mode. | |
6dc3064a DG |
2411 | */ |
2412 | if (session->output_traces) { | |
2413 | ret = LTTNG_ERR_EPERM; | |
2414 | goto error; | |
2415 | } | |
2416 | ||
eb240553 DG |
2417 | if (output->id) { |
2418 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2419 | session->name); | |
2420 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2421 | } else if (*output->name != '\0') { | |
2422 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2423 | session->name); | |
2424 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2425 | } | |
6dc3064a DG |
2426 | if (!sout) { |
2427 | ret = LTTNG_ERR_INVALID; | |
2428 | goto error; | |
2429 | } | |
2430 | ||
2431 | snapshot_delete_output(&session->snapshot, sout); | |
2432 | snapshot_output_destroy(sout); | |
2433 | ret = LTTNG_OK; | |
2434 | ||
2435 | error: | |
2436 | rcu_read_unlock(); | |
2437 | return ret; | |
2438 | } | |
2439 | ||
2440 | /* | |
2441 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2442 | * | |
2443 | * If no output is available, outputs is untouched and 0 is returned. | |
2444 | * | |
2445 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2446 | */ | |
2447 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2448 | struct lttng_snapshot_output **outputs) | |
2449 | { | |
2450 | int ret, idx = 0; | |
2451 | struct lttng_snapshot_output *list; | |
2452 | struct lttng_ht_iter iter; | |
2453 | struct snapshot_output *output; | |
2454 | ||
2455 | assert(session); | |
2456 | assert(outputs); | |
2457 | ||
2458 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2459 | ||
2460 | /* | |
d3f14b8a MD |
2461 | * Permission denied to create an output if the session is not |
2462 | * set in no output mode. | |
6dc3064a DG |
2463 | */ |
2464 | if (session->output_traces) { | |
2465 | ret = LTTNG_ERR_EPERM; | |
2466 | goto error; | |
2467 | } | |
2468 | ||
2469 | if (session->snapshot.nb_output == 0) { | |
2470 | ret = 0; | |
2471 | goto error; | |
2472 | } | |
2473 | ||
2474 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2475 | if (!list) { | |
2476 | ret = LTTNG_ERR_NOMEM; | |
2477 | goto error; | |
2478 | } | |
2479 | ||
2480 | /* Copy list from session to the new list object. */ | |
2481 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, | |
2482 | output, node.node) { | |
2483 | assert(output->consumer); | |
2484 | list[idx].id = output->id; | |
2485 | list[idx].max_size = output->max_size; | |
2486 | strncpy(list[idx].name, output->name, sizeof(list[idx].name)); | |
2487 | if (output->consumer->type == CONSUMER_DST_LOCAL) { | |
2488 | strncpy(list[idx].ctrl_url, output->consumer->dst.trace_path, | |
2489 | sizeof(list[idx].ctrl_url)); | |
2490 | } else { | |
2491 | /* Control URI. */ | |
2492 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
2493 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
2494 | if (ret < 0) { | |
2495 | ret = LTTNG_ERR_NOMEM; | |
2496 | goto free_error; | |
2497 | } | |
2498 | ||
2499 | /* Data URI. */ | |
2500 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
2501 | list[idx].data_url, sizeof(list[idx].data_url)); | |
2502 | if (ret < 0) { | |
2503 | ret = LTTNG_ERR_NOMEM; | |
2504 | goto free_error; | |
2505 | } | |
2506 | } | |
2507 | idx++; | |
2508 | } | |
2509 | ||
2510 | *outputs = list; | |
2511 | return session->snapshot.nb_output; | |
2512 | ||
2513 | free_error: | |
2514 | free(list); | |
2515 | error: | |
2516 | return -ret; | |
2517 | } | |
2518 | ||
2519 | /* | |
2520 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
2521 | * snapshot output is *not* set with a remote destination. | |
2522 | * | |
a934f4af | 2523 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2524 | */ |
2525 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
2526 | struct snapshot_output *snap_output, struct ltt_session *session) | |
2527 | { | |
a934f4af | 2528 | int ret = LTTNG_OK; |
6dc3064a DG |
2529 | struct lttng_ht_iter iter; |
2530 | struct consumer_socket *socket; | |
2531 | ||
2532 | assert(consumer); | |
2533 | assert(snap_output); | |
2534 | assert(session); | |
2535 | ||
2536 | DBG2("Set relayd object from snapshot output"); | |
2537 | ||
2538 | /* Ignore if snapshot consumer output is not network. */ | |
2539 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
2540 | goto error; | |
2541 | } | |
2542 | ||
2543 | /* | |
2544 | * For each consumer socket, create and send the relayd object of the | |
2545 | * snapshot output. | |
2546 | */ | |
2547 | rcu_read_lock(); | |
5eecee74 DG |
2548 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
2549 | socket, node.node) { | |
6dc3064a | 2550 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
2551 | snap_output->consumer, socket, |
2552 | session->name, session->hostname, | |
2553 | session->live_timer); | |
a934f4af | 2554 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2555 | rcu_read_unlock(); |
2556 | goto error; | |
2557 | } | |
2558 | } | |
2559 | rcu_read_unlock(); | |
2560 | ||
2561 | error: | |
2562 | return ret; | |
2563 | } | |
2564 | ||
2565 | /* | |
2566 | * Record a kernel snapshot. | |
2567 | * | |
a934f4af | 2568 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2569 | */ |
2570 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded JD |
2571 | struct snapshot_output *output, struct ltt_session *session, |
2572 | int wait, int nb_streams) | |
6dc3064a DG |
2573 | { |
2574 | int ret; | |
2575 | ||
2576 | assert(ksess); | |
2577 | assert(output); | |
2578 | assert(session); | |
2579 | ||
10a50311 JD |
2580 | /* Get the datetime for the snapshot output directory. */ |
2581 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2582 | sizeof(output->datetime)); | |
2583 | if (!ret) { | |
a934f4af | 2584 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2585 | goto error; |
2586 | } | |
2587 | ||
af706bb7 DG |
2588 | /* |
2589 | * Copy kernel session sockets so we can communicate with the right | |
2590 | * consumer for the snapshot record command. | |
2591 | */ | |
2592 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
2593 | if (ret < 0) { | |
a934f4af | 2594 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2595 | goto error; |
6dc3064a DG |
2596 | } |
2597 | ||
2598 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 2599 | if (ret != LTTNG_OK) { |
af706bb7 | 2600 | goto error_snapshot; |
6dc3064a DG |
2601 | } |
2602 | ||
5c786ded | 2603 | ret = kernel_snapshot_record(ksess, output, wait, nb_streams); |
2a06df8d | 2604 | if (ret != LTTNG_OK) { |
af706bb7 | 2605 | goto error_snapshot; |
6dc3064a DG |
2606 | } |
2607 | ||
a934f4af DG |
2608 | ret = LTTNG_OK; |
2609 | ||
af706bb7 DG |
2610 | error_snapshot: |
2611 | /* Clean up copied sockets so this output can use some other later on. */ | |
2612 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
2613 | error: |
2614 | return ret; | |
2615 | } | |
2616 | ||
2617 | /* | |
2618 | * Record a UST snapshot. | |
2619 | * | |
a934f4af | 2620 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
2621 | */ |
2622 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded JD |
2623 | struct snapshot_output *output, struct ltt_session *session, |
2624 | int wait, int nb_streams) | |
6dc3064a DG |
2625 | { |
2626 | int ret; | |
2627 | ||
2628 | assert(usess); | |
2629 | assert(output); | |
2630 | assert(session); | |
2631 | ||
10a50311 JD |
2632 | /* Get the datetime for the snapshot output directory. */ |
2633 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2634 | sizeof(output->datetime)); | |
2635 | if (!ret) { | |
a934f4af | 2636 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2637 | goto error; |
2638 | } | |
2639 | ||
af706bb7 | 2640 | /* |
d3f14b8a | 2641 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
2642 | * consumer for the snapshot record command. |
2643 | */ | |
2644 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
2645 | if (ret < 0) { | |
a934f4af | 2646 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2647 | goto error; |
6dc3064a DG |
2648 | } |
2649 | ||
2650 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 2651 | if (ret != LTTNG_OK) { |
af706bb7 | 2652 | goto error_snapshot; |
6dc3064a DG |
2653 | } |
2654 | ||
5c786ded | 2655 | ret = ust_app_snapshot_record(usess, output, wait, nb_streams); |
6dc3064a | 2656 | if (ret < 0) { |
5c786ded | 2657 | if (ret == -EINVAL) { |
a934f4af | 2658 | ret = LTTNG_ERR_INVALID; |
86170a9c | 2659 | goto error_snapshot; |
5c786ded | 2660 | } |
86170a9c CB |
2661 | |
2662 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
af706bb7 | 2663 | goto error_snapshot; |
6dc3064a DG |
2664 | } |
2665 | ||
a934f4af DG |
2666 | ret = LTTNG_OK; |
2667 | ||
af706bb7 DG |
2668 | error_snapshot: |
2669 | /* Clean up copied sockets so this output can use some other later on. */ | |
2670 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
2671 | error: |
2672 | return ret; | |
2673 | } | |
2674 | ||
5c786ded JD |
2675 | /* |
2676 | * Returns the total number of streams for a session or a negative value | |
2677 | * on error. | |
2678 | */ | |
2679 | static unsigned int get_total_nb_stream(struct ltt_session *session) | |
2680 | { | |
2681 | unsigned int total_streams = 0; | |
2682 | ||
2683 | if (session->kernel_session) { | |
2684 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2685 | ||
2686 | total_streams += ksess->stream_count_global; | |
2687 | } | |
2688 | ||
2689 | if (session->ust_session) { | |
2690 | struct ltt_ust_session *usess = session->ust_session; | |
2691 | ||
2692 | total_streams += ust_app_get_nb_stream(usess); | |
2693 | } | |
2694 | ||
2695 | return total_streams; | |
2696 | } | |
2697 | ||
6dc3064a DG |
2698 | /* |
2699 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
2700 | * | |
2701 | * The wait parameter is ignored so this call always wait for the snapshot to | |
2702 | * complete before returning. | |
2703 | * | |
2704 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2705 | */ | |
2706 | int cmd_snapshot_record(struct ltt_session *session, | |
2707 | struct lttng_snapshot_output *output, int wait) | |
2708 | { | |
2709 | int ret = LTTNG_OK; | |
e1986656 DG |
2710 | unsigned int use_tmp_output = 0; |
2711 | struct snapshot_output tmp_output; | |
1bfe7328 | 2712 | unsigned int nb_streams, snapshot_success = 0; |
6dc3064a DG |
2713 | |
2714 | assert(session); | |
2715 | ||
2716 | DBG("Cmd snapshot record for session %s", session->name); | |
2717 | ||
2718 | /* | |
d3f14b8a MD |
2719 | * Permission denied to create an output if the session is not |
2720 | * set in no output mode. | |
6dc3064a DG |
2721 | */ |
2722 | if (session->output_traces) { | |
2723 | ret = LTTNG_ERR_EPERM; | |
2724 | goto error; | |
2725 | } | |
2726 | ||
2727 | /* The session needs to be started at least once. */ | |
2728 | if (!session->started) { | |
2729 | ret = LTTNG_ERR_START_SESSION_ONCE; | |
2730 | goto error; | |
2731 | } | |
2732 | ||
2733 | /* Use temporary output for the session. */ | |
2734 | if (output && *output->ctrl_url != '\0') { | |
6dc3064a DG |
2735 | ret = snapshot_output_init(output->max_size, output->name, |
2736 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 2737 | &tmp_output, NULL); |
6dc3064a DG |
2738 | if (ret < 0) { |
2739 | if (ret == -ENOMEM) { | |
2740 | ret = LTTNG_ERR_NOMEM; | |
2741 | } else { | |
2742 | ret = LTTNG_ERR_INVALID; | |
2743 | } | |
2744 | goto error; | |
2745 | } | |
1bfe7328 DG |
2746 | /* Use the global session count for the temporary snapshot. */ |
2747 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
e1986656 | 2748 | use_tmp_output = 1; |
6dc3064a DG |
2749 | } |
2750 | ||
5c786ded JD |
2751 | /* |
2752 | * Get the total number of stream of that session which is used by the | |
2753 | * maximum size of the snapshot feature. | |
2754 | */ | |
2755 | nb_streams = get_total_nb_stream(session); | |
2756 | ||
6dc3064a DG |
2757 | if (session->kernel_session) { |
2758 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2759 | ||
e1986656 DG |
2760 | if (use_tmp_output) { |
2761 | ret = record_kernel_snapshot(ksess, &tmp_output, session, | |
5c786ded | 2762 | wait, nb_streams); |
a934f4af | 2763 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2764 | goto error; |
2765 | } | |
1bfe7328 | 2766 | snapshot_success = 1; |
6dc3064a DG |
2767 | } else { |
2768 | struct snapshot_output *sout; | |
2769 | struct lttng_ht_iter iter; | |
2770 | ||
2771 | rcu_read_lock(); | |
2772 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
2773 | &iter.iter, sout, node.node) { | |
e1986656 DG |
2774 | /* |
2775 | * Make a local copy of the output and assign the possible | |
2776 | * temporary value given by the caller. | |
2777 | */ | |
2778 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
2779 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
2780 | ||
2781 | /* Use temporary max size. */ | |
2782 | if (output->max_size != (uint64_t) -1ULL) { | |
2783 | tmp_output.max_size = output->max_size; | |
2784 | } | |
2785 | ||
2786 | /* Use temporary name. */ | |
2787 | if (*output->name != '\0') { | |
2788 | strncpy(tmp_output.name, output->name, | |
2789 | sizeof(tmp_output.name)); | |
2790 | } | |
2791 | ||
1bfe7328 DG |
2792 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
2793 | ||
e1986656 | 2794 | ret = record_kernel_snapshot(ksess, &tmp_output, |
5c786ded | 2795 | session, wait, nb_streams); |
a934f4af | 2796 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2797 | rcu_read_unlock(); |
2798 | goto error; | |
2799 | } | |
1bfe7328 | 2800 | snapshot_success = 1; |
6dc3064a DG |
2801 | } |
2802 | rcu_read_unlock(); | |
2803 | } | |
2804 | } | |
2805 | ||
2806 | if (session->ust_session) { | |
2807 | struct ltt_ust_session *usess = session->ust_session; | |
2808 | ||
e1986656 DG |
2809 | if (use_tmp_output) { |
2810 | ret = record_ust_snapshot(usess, &tmp_output, session, | |
5c786ded | 2811 | wait, nb_streams); |
a934f4af | 2812 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2813 | goto error; |
2814 | } | |
1bfe7328 | 2815 | snapshot_success = 1; |
6dc3064a DG |
2816 | } else { |
2817 | struct snapshot_output *sout; | |
2818 | struct lttng_ht_iter iter; | |
2819 | ||
2820 | rcu_read_lock(); | |
2821 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
2822 | &iter.iter, sout, node.node) { | |
e1986656 DG |
2823 | /* |
2824 | * Make a local copy of the output and assign the possible | |
2825 | * temporary value given by the caller. | |
2826 | */ | |
2827 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
2828 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
2829 | ||
e1986656 DG |
2830 | /* Use temporary max size. */ |
2831 | if (output->max_size != (uint64_t) -1ULL) { | |
2832 | tmp_output.max_size = output->max_size; | |
2833 | } | |
2834 | ||
2835 | /* Use temporary name. */ | |
2836 | if (*output->name != '\0') { | |
2837 | strncpy(tmp_output.name, output->name, | |
2838 | sizeof(tmp_output.name)); | |
2839 | } | |
2840 | ||
1bfe7328 DG |
2841 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
2842 | ||
e1986656 | 2843 | ret = record_ust_snapshot(usess, &tmp_output, session, |
5c786ded | 2844 | wait, nb_streams); |
a934f4af | 2845 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2846 | rcu_read_unlock(); |
2847 | goto error; | |
2848 | } | |
1bfe7328 | 2849 | snapshot_success = 1; |
6dc3064a DG |
2850 | } |
2851 | rcu_read_unlock(); | |
2852 | } | |
2853 | } | |
2854 | ||
1bfe7328 DG |
2855 | if (snapshot_success) { |
2856 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
2857 | } else { |
2858 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
2859 | } |
2860 | ||
6dc3064a | 2861 | error: |
6dc3064a DG |
2862 | return ret; |
2863 | } | |
2864 | ||
2f77fc4b DG |
2865 | /* |
2866 | * Init command subsystem. | |
2867 | */ | |
2868 | void cmd_init(void) | |
2869 | { | |
2870 | /* | |
d88aee68 DG |
2871 | * Set network sequence index to 1 for streams to match a relayd |
2872 | * socket on the consumer side. | |
2f77fc4b | 2873 | */ |
d88aee68 DG |
2874 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
2875 | relayd_net_seq_idx = 1; | |
2876 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
2877 | |
2878 | DBG("Command subsystem initialized"); | |
2879 | } |