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; | |
2f785fe7 DG |
169 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
170 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
2f77fc4b DG |
171 | switch (uchan->attr.output) { |
172 | case LTTNG_UST_MMAP: | |
173 | default: | |
174 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
175 | break; | |
176 | } | |
177 | i++; | |
178 | } | |
e7fe706f | 179 | rcu_read_unlock(); |
2f77fc4b DG |
180 | break; |
181 | } | |
182 | default: | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
3c6a091f | 187 | /* |
022d91ba | 188 | * Create a list of agent domain events. |
3c6a091f DG |
189 | * |
190 | * Return number of events in list on success or else a negative value. | |
191 | */ | |
022d91ba | 192 | static int list_lttng_agent_events(struct agent *agt, |
3c6a091f DG |
193 | struct lttng_event **events) |
194 | { | |
195 | int i = 0, ret = 0; | |
196 | unsigned int nb_event = 0; | |
022d91ba | 197 | struct agent_event *event; |
3c6a091f DG |
198 | struct lttng_event *tmp_events; |
199 | struct lttng_ht_iter iter; | |
200 | ||
022d91ba | 201 | assert(agt); |
3c6a091f DG |
202 | assert(events); |
203 | ||
022d91ba | 204 | DBG3("Listing agent events"); |
3c6a091f | 205 | |
022d91ba | 206 | nb_event = lttng_ht_get_count(agt->events); |
3c6a091f DG |
207 | if (nb_event == 0) { |
208 | ret = nb_event; | |
209 | goto error; | |
210 | } | |
211 | ||
212 | tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); | |
213 | if (!tmp_events) { | |
022d91ba | 214 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
215 | ret = -LTTNG_ERR_FATAL; |
216 | goto error; | |
217 | } | |
218 | ||
219 | rcu_read_lock(); | |
022d91ba | 220 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
221 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
222 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
223 | tmp_events[i].enabled = event->enabled; | |
ff94328f DG |
224 | tmp_events[i].loglevel = event->loglevel; |
225 | tmp_events[i].loglevel_type = event->loglevel_type; | |
3c6a091f DG |
226 | i++; |
227 | } | |
228 | rcu_read_unlock(); | |
229 | ||
230 | *events = tmp_events; | |
231 | ret = nb_event; | |
232 | ||
233 | error: | |
234 | assert(nb_event == i); | |
235 | return ret; | |
236 | } | |
237 | ||
2f77fc4b DG |
238 | /* |
239 | * Create a list of ust global domain events. | |
240 | */ | |
241 | static int list_lttng_ust_global_events(char *channel_name, | |
242 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
243 | { | |
244 | int i = 0, ret = 0; | |
245 | unsigned int nb_event = 0; | |
246 | struct lttng_ht_iter iter; | |
247 | struct lttng_ht_node_str *node; | |
248 | struct ltt_ust_channel *uchan; | |
249 | struct ltt_ust_event *uevent; | |
250 | struct lttng_event *tmp; | |
251 | ||
252 | DBG("Listing UST global events for channel %s", channel_name); | |
253 | ||
254 | rcu_read_lock(); | |
255 | ||
256 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
257 | node = lttng_ht_iter_get_node_str(&iter); | |
258 | if (node == NULL) { | |
f73fabfd | 259 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
260 | goto error; |
261 | } | |
262 | ||
263 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
264 | ||
265 | nb_event += lttng_ht_get_count(uchan->events); | |
266 | ||
267 | if (nb_event == 0) { | |
268 | ret = nb_event; | |
269 | goto error; | |
270 | } | |
271 | ||
272 | DBG3("Listing UST global %d events", nb_event); | |
273 | ||
274 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
275 | if (tmp == NULL) { | |
f73fabfd | 276 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
277 | goto error; |
278 | } | |
279 | ||
280 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
281 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
282 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
283 | tmp[i].enabled = uevent->enabled; | |
284 | ||
285 | switch (uevent->attr.instrumentation) { | |
286 | case LTTNG_UST_TRACEPOINT: | |
287 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
288 | break; | |
289 | case LTTNG_UST_PROBE: | |
290 | tmp[i].type = LTTNG_EVENT_PROBE; | |
291 | break; | |
292 | case LTTNG_UST_FUNCTION: | |
293 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
294 | break; | |
295 | } | |
296 | ||
297 | tmp[i].loglevel = uevent->attr.loglevel; | |
298 | switch (uevent->attr.loglevel_type) { | |
299 | case LTTNG_UST_LOGLEVEL_ALL: | |
300 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
301 | break; | |
302 | case LTTNG_UST_LOGLEVEL_RANGE: | |
303 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
304 | break; | |
305 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
306 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
307 | break; | |
308 | } | |
309 | if (uevent->filter) { | |
310 | tmp[i].filter = 1; | |
311 | } | |
4634f12e JI |
312 | if (uevent->exclusion) { |
313 | tmp[i].exclusion = 1; | |
314 | } | |
2f77fc4b DG |
315 | i++; |
316 | } | |
317 | ||
318 | ret = nb_event; | |
319 | *events = tmp; | |
320 | ||
321 | error: | |
322 | rcu_read_unlock(); | |
323 | return ret; | |
324 | } | |
325 | ||
326 | /* | |
327 | * Fill lttng_event array of all kernel events in the channel. | |
328 | */ | |
329 | static int list_lttng_kernel_events(char *channel_name, | |
330 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
331 | { | |
332 | int i = 0, ret; | |
333 | unsigned int nb_event; | |
334 | struct ltt_kernel_event *event; | |
335 | struct ltt_kernel_channel *kchan; | |
336 | ||
337 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
338 | if (kchan == NULL) { | |
f73fabfd | 339 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
340 | goto error; |
341 | } | |
342 | ||
343 | nb_event = kchan->event_count; | |
344 | ||
345 | DBG("Listing events for channel %s", kchan->channel->name); | |
346 | ||
347 | if (nb_event == 0) { | |
f73fabfd | 348 | goto end; |
2f77fc4b DG |
349 | } |
350 | ||
351 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
352 | if (*events == NULL) { | |
f73fabfd | 353 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
354 | goto error; |
355 | } | |
356 | ||
357 | /* Kernel channels */ | |
358 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
359 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
360 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
361 | (*events)[i].enabled = event->enabled; | |
362 | ||
363 | switch (event->event->instrumentation) { | |
364 | case LTTNG_KERNEL_TRACEPOINT: | |
365 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
366 | break; | |
2f77fc4b | 367 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
368 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
369 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
370 | sizeof(struct lttng_kernel_kprobe)); | |
371 | break; | |
372 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
373 | (*events)[i].type = LTTNG_EVENT_PROBE; |
374 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
375 | sizeof(struct lttng_kernel_kprobe)); | |
376 | break; | |
377 | case LTTNG_KERNEL_FUNCTION: | |
378 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
379 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
380 | sizeof(struct lttng_kernel_function)); | |
381 | break; | |
382 | case LTTNG_KERNEL_NOOP: | |
383 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
384 | break; | |
385 | case LTTNG_KERNEL_SYSCALL: | |
386 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
387 | break; | |
388 | case LTTNG_KERNEL_ALL: | |
389 | assert(0); | |
390 | break; | |
391 | } | |
392 | i++; | |
393 | } | |
394 | ||
f73fabfd | 395 | end: |
2f77fc4b DG |
396 | return nb_event; |
397 | ||
398 | error: | |
f73fabfd DG |
399 | /* Negate the error code to differentiate the size from an error */ |
400 | return -ret; | |
2f77fc4b DG |
401 | } |
402 | ||
403 | /* | |
404 | * Add URI so the consumer output object. Set the correct path depending on the | |
405 | * domain adding the default trace directory. | |
406 | */ | |
407 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
408 | struct lttng_uri *uri, int domain, const char *session_name) | |
409 | { | |
f73fabfd | 410 | int ret = LTTNG_OK; |
2f77fc4b DG |
411 | const char *default_trace_dir; |
412 | ||
413 | assert(uri); | |
414 | ||
415 | if (consumer == NULL) { | |
416 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 417 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
418 | goto error; |
419 | } | |
420 | ||
421 | switch (domain) { | |
422 | case LTTNG_DOMAIN_KERNEL: | |
423 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
424 | break; | |
425 | case LTTNG_DOMAIN_UST: | |
426 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
427 | break; | |
428 | default: | |
429 | /* | |
430 | * This case is possible is we try to add the URI to the global tracing | |
431 | * session consumer object which in this case there is no subdir. | |
432 | */ | |
433 | default_trace_dir = ""; | |
434 | } | |
435 | ||
436 | switch (uri->dtype) { | |
437 | case LTTNG_DST_IPV4: | |
438 | case LTTNG_DST_IPV6: | |
439 | DBG2("Setting network URI to consumer"); | |
440 | ||
df75acac DG |
441 | if (consumer->type == CONSUMER_DST_NET) { |
442 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
443 | consumer->dst.net.control_isset) || |
444 | (uri->stype == LTTNG_STREAM_DATA && | |
445 | consumer->dst.net.data_isset)) { | |
df75acac DG |
446 | ret = LTTNG_ERR_URL_EXIST; |
447 | goto error; | |
448 | } | |
449 | } else { | |
450 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
451 | } |
452 | ||
df75acac DG |
453 | consumer->type = CONSUMER_DST_NET; |
454 | ||
2f77fc4b DG |
455 | /* Set URI into consumer output object */ |
456 | ret = consumer_set_network_uri(consumer, uri); | |
457 | if (ret < 0) { | |
a74934ba | 458 | ret = -ret; |
2f77fc4b DG |
459 | goto error; |
460 | } else if (ret == 1) { | |
461 | /* | |
462 | * URI was the same in the consumer so we do not append the subdir | |
463 | * again so to not duplicate output dir. | |
464 | */ | |
f86c9f4e | 465 | ret = LTTNG_OK; |
2f77fc4b DG |
466 | goto error; |
467 | } | |
468 | ||
469 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
470 | ret = consumer_set_subdir(consumer, session_name); | |
471 | if (ret < 0) { | |
f73fabfd | 472 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
473 | goto error; |
474 | } | |
475 | } | |
476 | ||
477 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
478 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
479 | strncat(consumer->subdir, default_trace_dir, |
480 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
481 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
482 | } | |
483 | ||
484 | break; | |
485 | case LTTNG_DST_PATH: | |
486 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
487 | memset(consumer->dst.trace_path, 0, | |
488 | sizeof(consumer->dst.trace_path)); | |
489 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
490 | sizeof(consumer->dst.trace_path)); | |
491 | /* Append default trace dir */ | |
492 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
493 | sizeof(consumer->dst.trace_path) - |
494 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
495 | /* Flag consumer as local. */ |
496 | consumer->type = CONSUMER_DST_LOCAL; | |
497 | break; | |
498 | } | |
499 | ||
a74934ba DG |
500 | ret = LTTNG_OK; |
501 | ||
2f77fc4b DG |
502 | error: |
503 | return ret; | |
504 | } | |
505 | ||
506 | /* | |
507 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
508 | */ | |
509 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
510 | { | |
511 | int ret = 0; | |
512 | struct lttng_ht_iter iter; | |
513 | struct consumer_socket *socket; | |
514 | ||
515 | assert(session); | |
516 | ||
e7fe706f DG |
517 | rcu_read_lock(); |
518 | ||
2f77fc4b DG |
519 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
520 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
521 | socket, node.node) { | |
2f77fc4b | 522 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 523 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
524 | pthread_mutex_unlock(socket->lock); |
525 | if (ret < 0) { | |
f73fabfd | 526 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
527 | goto error; |
528 | } | |
529 | } | |
530 | } | |
531 | ||
532 | error: | |
e7fe706f | 533 | rcu_read_unlock(); |
2f77fc4b DG |
534 | return ret; |
535 | } | |
536 | ||
537 | /* | |
538 | * Create a socket to the relayd using the URI. | |
539 | * | |
540 | * On success, the relayd_sock pointer is set to the created socket. | |
541 | * Else, it's stays untouched and a lttcomm error code is returned. | |
542 | */ | |
6151a90f JD |
543 | static int create_connect_relayd(struct lttng_uri *uri, |
544 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
545 | { |
546 | int ret; | |
6151a90f | 547 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 548 | |
6151a90f JD |
549 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
550 | RELAYD_VERSION_COMM_MINOR); | |
551 | if (!rsock) { | |
f73fabfd | 552 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
553 | goto error; |
554 | } | |
555 | ||
ffe60014 DG |
556 | /* |
557 | * Connect to relayd so we can proceed with a session creation. This call | |
558 | * can possibly block for an arbitrary amount of time to set the health | |
559 | * state to be in poll execution. | |
560 | */ | |
561 | health_poll_entry(); | |
6151a90f | 562 | ret = relayd_connect(rsock); |
ffe60014 | 563 | health_poll_exit(); |
2f77fc4b DG |
564 | if (ret < 0) { |
565 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 566 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
567 | goto free_sock; |
568 | } | |
569 | ||
570 | /* Create socket for control stream. */ | |
571 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
572 | DBG3("Creating relayd stream socket from URI"); | |
573 | ||
574 | /* Check relayd version */ | |
6151a90f | 575 | ret = relayd_version_check(rsock); |
2f77fc4b | 576 | if (ret < 0) { |
f73fabfd | 577 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
578 | goto close_sock; |
579 | } | |
580 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
581 | DBG3("Creating relayd data socket from URI"); | |
582 | } else { | |
583 | /* Command is not valid */ | |
584 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 585 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
586 | goto close_sock; |
587 | } | |
588 | ||
6151a90f | 589 | *relayd_sock = rsock; |
2f77fc4b | 590 | |
f73fabfd | 591 | return LTTNG_OK; |
2f77fc4b DG |
592 | |
593 | close_sock: | |
6151a90f JD |
594 | /* The returned value is not useful since we are on an error path. */ |
595 | (void) relayd_close(rsock); | |
2f77fc4b | 596 | free_sock: |
6151a90f | 597 | free(rsock); |
2f77fc4b DG |
598 | error: |
599 | return ret; | |
600 | } | |
601 | ||
602 | /* | |
603 | * Connect to the relayd using URI and send the socket to the right consumer. | |
604 | */ | |
6dc3064a | 605 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 606 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
607 | struct consumer_socket *consumer_sock, |
608 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
609 | { |
610 | int ret; | |
6151a90f | 611 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 612 | |
ffe60014 | 613 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 614 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 615 | if (ret != LTTNG_OK) { |
6151a90f | 616 | goto error; |
ffe60014 | 617 | } |
6151a90f | 618 | assert(rsock); |
ffe60014 | 619 | |
2f77fc4b | 620 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
621 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
622 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
623 | /* |
624 | * Increment net_seq_idx because we are about to transfer the | |
625 | * new relayd socket to the consumer. | |
d88aee68 | 626 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 627 | */ |
d88aee68 DG |
628 | consumer->net_seq_index = ++relayd_net_seq_idx; |
629 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
630 | } |
631 | ||
2f77fc4b | 632 | /* Send relayd socket to consumer. */ |
6151a90f | 633 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
634 | relayd_uri->stype, session_id, |
635 | session_name, hostname, session_live_timer); | |
2f77fc4b | 636 | if (ret < 0) { |
f73fabfd | 637 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
638 | goto close_sock; |
639 | } | |
640 | ||
c890b720 DG |
641 | /* Flag that the corresponding socket was sent. */ |
642 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 643 | consumer_sock->control_sock_sent = 1; |
c890b720 | 644 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 645 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
646 | } |
647 | ||
f73fabfd | 648 | ret = LTTNG_OK; |
2f77fc4b DG |
649 | |
650 | /* | |
651 | * Close socket which was dup on the consumer side. The session daemon does | |
652 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
653 | */ | |
654 | ||
655 | close_sock: | |
6151a90f JD |
656 | (void) relayd_close(rsock); |
657 | free(rsock); | |
2f77fc4b | 658 | |
6151a90f | 659 | error: |
ffe60014 DG |
660 | if (ret != LTTNG_OK) { |
661 | /* | |
d9078d0c DG |
662 | * The consumer output for this session should not be used anymore |
663 | * since the relayd connection failed thus making any tracing or/and | |
664 | * streaming not usable. | |
ffe60014 | 665 | */ |
d9078d0c | 666 | consumer->enabled = 0; |
ffe60014 | 667 | } |
2f77fc4b DG |
668 | return ret; |
669 | } | |
670 | ||
671 | /* | |
672 | * Send both relayd sockets to a specific consumer and domain. This is a | |
673 | * helper function to facilitate sending the information to the consumer for a | |
674 | * session. | |
675 | */ | |
6dc3064a | 676 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
677 | struct consumer_output *consumer, struct consumer_socket *sock, |
678 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 679 | { |
dda67f6c | 680 | int ret = LTTNG_OK; |
2f77fc4b | 681 | |
2f77fc4b | 682 | assert(consumer); |
6dc3064a | 683 | assert(sock); |
2f77fc4b | 684 | |
2f77fc4b | 685 | /* Sending control relayd socket. */ |
ffe60014 | 686 | if (!sock->control_sock_sent) { |
6dc3064a | 687 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
688 | &consumer->dst.net.control, consumer, sock, |
689 | session_name, hostname, session_live_timer); | |
c890b720 DG |
690 | if (ret != LTTNG_OK) { |
691 | goto error; | |
692 | } | |
2f77fc4b DG |
693 | } |
694 | ||
695 | /* Sending data relayd socket. */ | |
ffe60014 | 696 | if (!sock->data_sock_sent) { |
6dc3064a | 697 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
698 | &consumer->dst.net.data, consumer, sock, |
699 | session_name, hostname, session_live_timer); | |
c890b720 DG |
700 | if (ret != LTTNG_OK) { |
701 | goto error; | |
702 | } | |
2f77fc4b DG |
703 | } |
704 | ||
2f77fc4b DG |
705 | error: |
706 | return ret; | |
707 | } | |
708 | ||
709 | /* | |
710 | * Setup relayd connections for a tracing session. First creates the socket to | |
711 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
712 | * network. | |
713 | */ | |
ffe60014 | 714 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 715 | { |
f73fabfd | 716 | int ret = LTTNG_OK; |
2f77fc4b DG |
717 | struct ltt_ust_session *usess; |
718 | struct ltt_kernel_session *ksess; | |
719 | struct consumer_socket *socket; | |
720 | struct lttng_ht_iter iter; | |
721 | ||
722 | assert(session); | |
723 | ||
724 | usess = session->ust_session; | |
725 | ksess = session->kernel_session; | |
726 | ||
785d2d0d | 727 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 728 | |
e7fe706f DG |
729 | rcu_read_lock(); |
730 | ||
2f77fc4b DG |
731 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
732 | && usess->consumer->enabled) { | |
733 | /* For each consumer socket, send relayd sockets */ | |
734 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
735 | socket, node.node) { | |
2f77fc4b | 736 | pthread_mutex_lock(socket->lock); |
6dc3064a | 737 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
738 | usess->consumer, socket, |
739 | session->name, session->hostname, | |
740 | session->live_timer); | |
2f77fc4b | 741 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 742 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
743 | goto error; |
744 | } | |
6dc3064a DG |
745 | /* Session is now ready for network streaming. */ |
746 | session->net_handle = 1; | |
2f77fc4b DG |
747 | } |
748 | } | |
749 | ||
750 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
751 | && ksess->consumer->enabled) { | |
752 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
753 | socket, node.node) { | |
2f77fc4b | 754 | pthread_mutex_lock(socket->lock); |
6dc3064a | 755 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
756 | ksess->consumer, socket, |
757 | session->name, session->hostname, | |
758 | session->live_timer); | |
2f77fc4b | 759 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 760 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
761 | goto error; |
762 | } | |
6dc3064a DG |
763 | /* Session is now ready for network streaming. */ |
764 | session->net_handle = 1; | |
2f77fc4b DG |
765 | } |
766 | } | |
767 | ||
768 | error: | |
e7fe706f | 769 | rcu_read_unlock(); |
2f77fc4b DG |
770 | return ret; |
771 | } | |
772 | ||
9b6c7ec5 DG |
773 | /* |
774 | * Start a kernel session by opening all necessary streams. | |
775 | */ | |
776 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
777 | { | |
778 | int ret; | |
779 | struct ltt_kernel_channel *kchan; | |
780 | ||
781 | /* Open kernel metadata */ | |
07b86b52 | 782 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
783 | ret = kernel_open_metadata(ksess); |
784 | if (ret < 0) { | |
785 | ret = LTTNG_ERR_KERN_META_FAIL; | |
786 | goto error; | |
787 | } | |
788 | } | |
789 | ||
790 | /* Open kernel metadata stream */ | |
07b86b52 | 791 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
792 | ret = kernel_open_metadata_stream(ksess); |
793 | if (ret < 0) { | |
794 | ERR("Kernel create metadata stream failed"); | |
795 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
796 | goto error; | |
797 | } | |
798 | } | |
799 | ||
800 | /* For each channel */ | |
801 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
802 | if (kchan->stream_count == 0) { | |
803 | ret = kernel_open_channel_stream(kchan); | |
804 | if (ret < 0) { | |
805 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
806 | goto error; | |
807 | } | |
808 | /* Update the stream global counter */ | |
809 | ksess->stream_count_global += ret; | |
810 | } | |
811 | } | |
812 | ||
813 | /* Setup kernel consumer socket and send fds to it */ | |
814 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 815 | if (ret != 0) { |
9b6c7ec5 DG |
816 | ret = LTTNG_ERR_KERN_START_FAIL; |
817 | goto error; | |
818 | } | |
819 | ||
820 | /* This start the kernel tracing */ | |
821 | ret = kernel_start_session(ksess); | |
822 | if (ret < 0) { | |
823 | ret = LTTNG_ERR_KERN_START_FAIL; | |
824 | goto error; | |
825 | } | |
826 | ||
827 | /* Quiescent wait after starting trace */ | |
784303b0 | 828 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 829 | |
14fb1ebe | 830 | ksess->active = 1; |
9b6c7ec5 DG |
831 | |
832 | ret = LTTNG_OK; | |
833 | ||
834 | error: | |
835 | return ret; | |
836 | } | |
837 | ||
2f77fc4b DG |
838 | /* |
839 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
840 | */ | |
841 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
842 | char *channel_name) | |
843 | { | |
844 | int ret; | |
845 | struct ltt_ust_session *usess; | |
846 | ||
847 | usess = session->ust_session; | |
848 | ||
2223c96f DG |
849 | rcu_read_lock(); |
850 | ||
2f77fc4b DG |
851 | switch (domain) { |
852 | case LTTNG_DOMAIN_KERNEL: | |
853 | { | |
854 | ret = channel_kernel_disable(session->kernel_session, | |
855 | channel_name); | |
f73fabfd | 856 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
857 | goto error; |
858 | } | |
859 | ||
860 | kernel_wait_quiescent(kernel_tracer_fd); | |
861 | break; | |
862 | } | |
863 | case LTTNG_DOMAIN_UST: | |
864 | { | |
865 | struct ltt_ust_channel *uchan; | |
866 | struct lttng_ht *chan_ht; | |
867 | ||
868 | chan_ht = usess->domain_global.channels; | |
869 | ||
870 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
871 | if (uchan == NULL) { | |
f73fabfd | 872 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
873 | goto error; |
874 | } | |
875 | ||
7972aab2 | 876 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 877 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
878 | goto error; |
879 | } | |
880 | break; | |
881 | } | |
882 | #if 0 | |
883 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
884 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
885 | case LTTNG_DOMAIN_UST_PID: | |
886 | #endif | |
887 | default: | |
f73fabfd | 888 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
889 | goto error; |
890 | } | |
891 | ||
f73fabfd | 892 | ret = LTTNG_OK; |
2f77fc4b DG |
893 | |
894 | error: | |
2223c96f | 895 | rcu_read_unlock(); |
2f77fc4b DG |
896 | return ret; |
897 | } | |
898 | ||
899 | /* | |
900 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
901 | * | |
902 | * The wpipe arguments is used as a notifier for the kernel thread. | |
903 | */ | |
904 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 905 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
906 | { |
907 | int ret; | |
908 | struct ltt_ust_session *usess = session->ust_session; | |
909 | struct lttng_ht *chan_ht; | |
910 | ||
911 | assert(session); | |
912 | assert(attr); | |
7972aab2 | 913 | assert(domain); |
2f77fc4b DG |
914 | |
915 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
916 | ||
03b4fdcf DG |
917 | rcu_read_lock(); |
918 | ||
ecc48a90 JD |
919 | /* |
920 | * Don't try to enable a channel if the session has been started at | |
921 | * some point in time before. The tracer does not allow it. | |
922 | */ | |
8382cf6f | 923 | if (session->has_been_started) { |
ecc48a90 JD |
924 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
925 | goto error; | |
926 | } | |
927 | ||
928 | /* | |
929 | * If the session is a live session, remove the switch timer, the | |
930 | * live timer does the same thing but sends also synchronisation | |
931 | * beacons for inactive streams. | |
932 | */ | |
933 | if (session->live_timer > 0) { | |
934 | attr->attr.live_timer_interval = session->live_timer; | |
935 | attr->attr.switch_timer_interval = 0; | |
936 | } | |
937 | ||
33fbd469 DG |
938 | /* |
939 | * The ringbuffer (both in user space and kernel) behave badly in overwrite | |
940 | * mode and with less than 2 subbuf so block it right away and send back an | |
941 | * invalid attribute error. | |
942 | */ | |
943 | if (attr->attr.overwrite && attr->attr.num_subbuf < 2) { | |
944 | ret = LTTNG_ERR_INVALID; | |
945 | goto error; | |
946 | } | |
947 | ||
7972aab2 | 948 | switch (domain->type) { |
2f77fc4b DG |
949 | case LTTNG_DOMAIN_KERNEL: |
950 | { | |
951 | struct ltt_kernel_channel *kchan; | |
952 | ||
2f77fc4b DG |
953 | kchan = trace_kernel_get_channel_by_name(attr->name, |
954 | session->kernel_session); | |
955 | if (kchan == NULL) { | |
956 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
957 | if (attr->name[0] != '\0') { |
958 | session->kernel_session->has_non_default_channel = 1; | |
959 | } | |
2f77fc4b DG |
960 | } else { |
961 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
962 | } | |
963 | ||
f73fabfd | 964 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
965 | goto error; |
966 | } | |
967 | ||
784303b0 | 968 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
969 | break; |
970 | } | |
971 | case LTTNG_DOMAIN_UST: | |
972 | { | |
973 | struct ltt_ust_channel *uchan; | |
974 | ||
975 | chan_ht = usess->domain_global.channels; | |
976 | ||
977 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
978 | if (uchan == NULL) { | |
7972aab2 | 979 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
980 | if (attr->name[0] != '\0') { |
981 | usess->has_non_default_channel = 1; | |
982 | } | |
2f77fc4b | 983 | } else { |
7972aab2 | 984 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
985 | } |
986 | break; | |
987 | } | |
2f77fc4b | 988 | default: |
f73fabfd | 989 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
990 | goto error; |
991 | } | |
992 | ||
993 | error: | |
2223c96f | 994 | rcu_read_unlock(); |
2f77fc4b DG |
995 | return ret; |
996 | } | |
997 | ||
998 | ||
999 | /* | |
1000 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1001 | */ | |
1002 | int cmd_disable_event(struct ltt_session *session, int domain, | |
1003 | char *channel_name, char *event_name) | |
1004 | { | |
1005 | int ret; | |
1006 | ||
2223c96f DG |
1007 | rcu_read_lock(); |
1008 | ||
2f77fc4b DG |
1009 | switch (domain) { |
1010 | case LTTNG_DOMAIN_KERNEL: | |
1011 | { | |
1012 | struct ltt_kernel_channel *kchan; | |
1013 | struct ltt_kernel_session *ksess; | |
1014 | ||
1015 | ksess = session->kernel_session; | |
1016 | ||
85076754 MD |
1017 | /* |
1018 | * If a non-default channel has been created in the | |
1019 | * session, explicitely require that -c chan_name needs | |
1020 | * to be provided. | |
1021 | */ | |
1022 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1023 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1024 | goto error; | |
1025 | } | |
1026 | ||
2f77fc4b DG |
1027 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1028 | if (kchan == NULL) { | |
f73fabfd | 1029 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1030 | goto error; |
1031 | } | |
1032 | ||
d3a56674 | 1033 | ret = event_kernel_disable_tracepoint(kchan, event_name); |
f73fabfd | 1034 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1035 | goto error; |
1036 | } | |
1037 | ||
1038 | kernel_wait_quiescent(kernel_tracer_fd); | |
1039 | break; | |
1040 | } | |
1041 | case LTTNG_DOMAIN_UST: | |
1042 | { | |
1043 | struct ltt_ust_channel *uchan; | |
1044 | struct ltt_ust_session *usess; | |
1045 | ||
1046 | usess = session->ust_session; | |
1047 | ||
85076754 MD |
1048 | /* |
1049 | * If a non-default channel has been created in the | |
1050 | * session, explicitely require that -c chan_name needs | |
1051 | * to be provided. | |
1052 | */ | |
1053 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1054 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1055 | goto error; | |
1056 | } | |
1057 | ||
2f77fc4b DG |
1058 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1059 | channel_name); | |
1060 | if (uchan == NULL) { | |
f73fabfd | 1061 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1062 | goto error; |
1063 | } | |
1064 | ||
7972aab2 | 1065 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
f73fabfd | 1066 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1067 | goto error; |
1068 | } | |
1069 | ||
1070 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1071 | channel_name); | |
1072 | break; | |
1073 | } | |
5cdb6027 | 1074 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1075 | case LTTNG_DOMAIN_JUL: |
1076 | { | |
fefd409b | 1077 | struct agent *agt; |
f20baf8e DG |
1078 | struct ltt_ust_session *usess = session->ust_session; |
1079 | ||
1080 | assert(usess); | |
1081 | ||
5cdb6027 | 1082 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1083 | if (!agt) { |
1084 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
1085 | goto error; | |
1086 | } | |
1087 | ||
1088 | ret = event_agent_disable(usess, agt, event_name); | |
f20baf8e DG |
1089 | if (ret != LTTNG_OK) { |
1090 | goto error; | |
1091 | } | |
1092 | ||
1093 | break; | |
1094 | } | |
2f77fc4b DG |
1095 | #if 0 |
1096 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1097 | case LTTNG_DOMAIN_UST_PID: | |
1098 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1099 | #endif | |
1100 | default: | |
f73fabfd | 1101 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1102 | goto error; |
1103 | } | |
1104 | ||
f73fabfd | 1105 | ret = LTTNG_OK; |
2f77fc4b DG |
1106 | |
1107 | error: | |
2223c96f | 1108 | rcu_read_unlock(); |
2f77fc4b DG |
1109 | return ret; |
1110 | } | |
1111 | ||
1112 | /* | |
1113 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
1114 | */ | |
1115 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
1116 | char *channel_name) | |
1117 | { | |
1118 | int ret; | |
1119 | ||
2223c96f DG |
1120 | rcu_read_lock(); |
1121 | ||
2f77fc4b DG |
1122 | switch (domain) { |
1123 | case LTTNG_DOMAIN_KERNEL: | |
1124 | { | |
1125 | struct ltt_kernel_session *ksess; | |
1126 | struct ltt_kernel_channel *kchan; | |
1127 | ||
1128 | ksess = session->kernel_session; | |
1129 | ||
85076754 MD |
1130 | /* |
1131 | * If a non-default channel has been created in the | |
1132 | * session, explicitely require that -c chan_name needs | |
1133 | * to be provided. | |
1134 | */ | |
1135 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1136 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1137 | goto error; | |
1138 | } | |
1139 | ||
2f77fc4b DG |
1140 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1141 | if (kchan == NULL) { | |
f73fabfd | 1142 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1143 | goto error; |
1144 | } | |
1145 | ||
d3a56674 | 1146 | ret = event_kernel_disable_all(kchan); |
f73fabfd | 1147 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1148 | goto error; |
1149 | } | |
1150 | ||
1151 | kernel_wait_quiescent(kernel_tracer_fd); | |
1152 | break; | |
1153 | } | |
1154 | case LTTNG_DOMAIN_UST: | |
1155 | { | |
1156 | struct ltt_ust_session *usess; | |
1157 | struct ltt_ust_channel *uchan; | |
1158 | ||
1159 | usess = session->ust_session; | |
1160 | ||
85076754 MD |
1161 | /* |
1162 | * If a non-default channel has been created in the | |
1163 | * session, explicitely require that -c chan_name needs | |
1164 | * to be provided. | |
1165 | */ | |
1166 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1167 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1168 | goto error; | |
1169 | } | |
1170 | ||
2f77fc4b DG |
1171 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1172 | channel_name); | |
1173 | if (uchan == NULL) { | |
f73fabfd | 1174 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1175 | goto error; |
1176 | } | |
1177 | ||
7972aab2 | 1178 | ret = event_ust_disable_all_tracepoints(usess, uchan); |
2f77fc4b DG |
1179 | if (ret != 0) { |
1180 | goto error; | |
1181 | } | |
1182 | ||
1183 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1184 | ||
f20baf8e DG |
1185 | break; |
1186 | } | |
5cdb6027 | 1187 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1188 | case LTTNG_DOMAIN_JUL: |
1189 | { | |
fefd409b | 1190 | struct agent *agt; |
f20baf8e DG |
1191 | struct ltt_ust_session *usess = session->ust_session; |
1192 | ||
1193 | assert(usess); | |
1194 | ||
5cdb6027 | 1195 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1196 | if (!agt) { |
1197 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
1198 | goto error; | |
1199 | } | |
1200 | ||
1201 | ret = event_agent_disable_all(usess, agt); | |
f20baf8e DG |
1202 | if (ret != LTTNG_OK) { |
1203 | goto error; | |
1204 | } | |
1205 | ||
2f77fc4b DG |
1206 | break; |
1207 | } | |
1208 | #if 0 | |
1209 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1210 | case LTTNG_DOMAIN_UST_PID: | |
1211 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1212 | #endif | |
1213 | default: | |
f73fabfd | 1214 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1215 | goto error; |
1216 | } | |
1217 | ||
f73fabfd | 1218 | ret = LTTNG_OK; |
2f77fc4b DG |
1219 | |
1220 | error: | |
2223c96f | 1221 | rcu_read_unlock(); |
2f77fc4b DG |
1222 | return ret; |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1227 | */ | |
1228 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1229 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1230 | { |
d5979e4a | 1231 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1232 | |
1233 | switch (domain) { | |
1234 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1235 | assert(session->kernel_session); |
1236 | ||
1237 | if (session->kernel_session->channel_count == 0) { | |
1238 | /* Create default channel */ | |
1239 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1240 | if (ret != LTTNG_OK) { | |
1241 | goto error; | |
1242 | } | |
d5979e4a | 1243 | chan_kern_created = 1; |
979e618e | 1244 | } |
2f77fc4b | 1245 | /* Add kernel context to kernel tracer */ |
601d5acf | 1246 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1247 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1248 | goto error; |
1249 | } | |
1250 | break; | |
1251 | case LTTNG_DOMAIN_UST: | |
1252 | { | |
1253 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1254 | unsigned int chan_count; |
1255 | ||
2f77fc4b DG |
1256 | assert(usess); |
1257 | ||
85076754 | 1258 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1259 | if (chan_count == 0) { |
1260 | struct lttng_channel *attr; | |
1261 | /* Create default channel */ | |
0a9c6494 | 1262 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1263 | if (attr == NULL) { |
1264 | ret = LTTNG_ERR_FATAL; | |
1265 | goto error; | |
1266 | } | |
1267 | ||
7972aab2 | 1268 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1269 | if (ret != LTTNG_OK) { |
1270 | free(attr); | |
1271 | goto error; | |
1272 | } | |
1273 | free(attr); | |
d5979e4a | 1274 | chan_ust_created = 1; |
979e618e DG |
1275 | } |
1276 | ||
601d5acf | 1277 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1278 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1279 | goto error; |
1280 | } | |
1281 | break; | |
1282 | } | |
1283 | #if 0 | |
1284 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1285 | case LTTNG_DOMAIN_UST_PID: | |
1286 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1287 | #endif | |
1288 | default: | |
f73fabfd | 1289 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1290 | goto error; |
1291 | } | |
1292 | ||
d5979e4a | 1293 | return LTTNG_OK; |
2f77fc4b DG |
1294 | |
1295 | error: | |
d5979e4a DG |
1296 | if (chan_kern_created) { |
1297 | struct ltt_kernel_channel *kchan = | |
1298 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1299 | session->kernel_session); | |
1300 | /* Created previously, this should NOT fail. */ | |
1301 | assert(kchan); | |
1302 | kernel_destroy_channel(kchan); | |
1303 | } | |
1304 | ||
1305 | if (chan_ust_created) { | |
1306 | struct ltt_ust_channel *uchan = | |
1307 | trace_ust_find_channel_by_name( | |
1308 | session->ust_session->domain_global.channels, | |
1309 | DEFAULT_CHANNEL_NAME); | |
1310 | /* Created previously, this should NOT fail. */ | |
1311 | assert(uchan); | |
1312 | /* Remove from the channel list of the session. */ | |
1313 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1314 | uchan); | |
1315 | trace_ust_destroy_channel(uchan); | |
1316 | } | |
2f77fc4b DG |
1317 | return ret; |
1318 | } | |
1319 | ||
930a2e99 JG |
1320 | static int validate_event_name(const char *name) |
1321 | { | |
1322 | int ret = 0; | |
1323 | const char *c = name; | |
1324 | const char *event_name_end = c + LTTNG_SYMBOL_NAME_LEN; | |
1325 | ||
1326 | /* | |
1327 | * Make sure that unescaped wildcards are only used as the last | |
1328 | * character of the event name. | |
1329 | */ | |
1330 | while (c < event_name_end) { | |
1331 | switch (*c) { | |
1332 | case '\0': | |
1333 | goto end; | |
1334 | case '\\': | |
1335 | c++; | |
1336 | break; | |
1337 | case '*': | |
1338 | if ((c + 1) < event_name_end && *(c + 1)) { | |
1339 | /* Wildcard is not the last character */ | |
1340 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1341 | goto end; | |
1342 | } | |
1343 | default: | |
1344 | break; | |
1345 | } | |
1346 | c++; | |
1347 | } | |
1348 | end: | |
1349 | return ret; | |
1350 | } | |
1351 | ||
2f77fc4b DG |
1352 | /* |
1353 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1354 | */ | |
7972aab2 | 1355 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 | 1356 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1357 | char *filter_expression, |
db8f1377 JI |
1358 | struct lttng_filter_bytecode *filter, |
1359 | struct lttng_event_exclusion *exclusion, | |
1360 | int wpipe) | |
2f77fc4b | 1361 | { |
e5f5db7f | 1362 | int ret, channel_created = 0; |
2f77fc4b DG |
1363 | struct lttng_channel *attr; |
1364 | ||
1365 | assert(session); | |
1366 | assert(event); | |
1367 | assert(channel_name); | |
1368 | ||
930a2e99 JG |
1369 | ret = validate_event_name(event->name); |
1370 | if (ret) { | |
1371 | goto error; | |
1372 | } | |
1373 | ||
2223c96f DG |
1374 | rcu_read_lock(); |
1375 | ||
7972aab2 | 1376 | switch (domain->type) { |
2f77fc4b DG |
1377 | case LTTNG_DOMAIN_KERNEL: |
1378 | { | |
1379 | struct ltt_kernel_channel *kchan; | |
1380 | ||
85076754 MD |
1381 | /* |
1382 | * If a non-default channel has been created in the | |
1383 | * session, explicitely require that -c chan_name needs | |
1384 | * to be provided. | |
1385 | */ | |
1386 | if (session->kernel_session->has_non_default_channel | |
1387 | && channel_name[0] == '\0') { | |
1388 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1389 | goto error; | |
1390 | } | |
1391 | ||
2f77fc4b DG |
1392 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1393 | session->kernel_session); | |
1394 | if (kchan == NULL) { | |
0a9c6494 DG |
1395 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1396 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1397 | if (attr == NULL) { |
f73fabfd | 1398 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1399 | goto error; |
1400 | } | |
1401 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1402 | ||
1403 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1404 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1405 | free(attr); |
1406 | goto error; | |
1407 | } | |
1408 | free(attr); | |
e5f5db7f DG |
1409 | |
1410 | channel_created = 1; | |
2f77fc4b DG |
1411 | } |
1412 | ||
1413 | /* Get the newly created kernel channel pointer */ | |
1414 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1415 | session->kernel_session); | |
1416 | if (kchan == NULL) { | |
1417 | /* This sould not happen... */ | |
f73fabfd | 1418 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1419 | goto error; |
1420 | } | |
1421 | ||
d3a56674 | 1422 | ret = event_kernel_enable_tracepoint(kchan, event); |
f73fabfd | 1423 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1424 | if (channel_created) { |
1425 | /* Let's not leak a useless channel. */ | |
1426 | kernel_destroy_channel(kchan); | |
1427 | } | |
2f77fc4b DG |
1428 | goto error; |
1429 | } | |
1430 | ||
1431 | kernel_wait_quiescent(kernel_tracer_fd); | |
1432 | break; | |
1433 | } | |
1434 | case LTTNG_DOMAIN_UST: | |
1435 | { | |
1436 | struct ltt_ust_channel *uchan; | |
1437 | struct ltt_ust_session *usess = session->ust_session; | |
1438 | ||
1439 | assert(usess); | |
1440 | ||
85076754 MD |
1441 | /* |
1442 | * If a non-default channel has been created in the | |
1443 | * session, explicitely require that -c chan_name needs | |
1444 | * to be provided. | |
1445 | */ | |
1446 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1447 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1448 | goto error; | |
1449 | } | |
1450 | ||
2f77fc4b DG |
1451 | /* Get channel from global UST domain */ |
1452 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1453 | channel_name); | |
1454 | if (uchan == NULL) { | |
1455 | /* Create default channel */ | |
0a9c6494 DG |
1456 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1457 | usess->buffer_type); | |
2f77fc4b | 1458 | if (attr == NULL) { |
f73fabfd | 1459 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1460 | goto error; |
1461 | } | |
1462 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1463 | ||
1464 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1465 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1466 | free(attr); |
1467 | goto error; | |
1468 | } | |
1469 | free(attr); | |
1470 | ||
1471 | /* Get the newly created channel reference back */ | |
1472 | uchan = trace_ust_find_channel_by_name( | |
1473 | usess->domain_global.channels, channel_name); | |
1474 | assert(uchan); | |
1475 | } | |
1476 | ||
1477 | /* At this point, the session and channel exist on the tracer */ | |
6b453b5e JG |
1478 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
1479 | filter_expression, filter, exclusion); | |
f73fabfd | 1480 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1481 | goto error; |
1482 | } | |
1483 | break; | |
1484 | } | |
5cdb6027 | 1485 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1486 | case LTTNG_DOMAIN_JUL: |
1487 | { | |
fefd409b | 1488 | struct agent *agt; |
f20baf8e DG |
1489 | struct lttng_event uevent; |
1490 | struct lttng_domain tmp_dom; | |
1491 | struct ltt_ust_session *usess = session->ust_session; | |
1492 | ||
1493 | assert(usess); | |
1494 | ||
5cdb6027 | 1495 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 1496 | if (!agt) { |
5cdb6027 | 1497 | agt = agent_create(domain->type); |
fefd409b DG |
1498 | if (!agt) { |
1499 | ret = -LTTNG_ERR_NOMEM; | |
1500 | goto error; | |
1501 | } | |
1502 | agent_add(agt, usess->agents); | |
1503 | } | |
1504 | ||
022d91ba | 1505 | /* Create the default tracepoint. */ |
996de3c7 | 1506 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
1507 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1508 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
f43f95a9 DG |
1509 | if (is_root) { |
1510 | strncpy(uevent.name, DEFAULT_SYS_JUL_EVENT_NAME, | |
1511 | sizeof(uevent.name)); | |
1512 | } else { | |
1513 | strncpy(uevent.name, DEFAULT_USER_JUL_EVENT_NAME, | |
1514 | sizeof(uevent.name)); | |
1515 | } | |
f20baf8e DG |
1516 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1517 | ||
1518 | /* | |
1519 | * The domain type is changed because we are about to enable the | |
1520 | * default channel and event for the JUL domain that are hardcoded. | |
1521 | * This happens in the UST domain. | |
1522 | */ | |
1523 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1524 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1525 | ||
1526 | ret = cmd_enable_event(session, &tmp_dom, DEFAULT_JUL_CHANNEL_NAME, | |
9b21e6d5 | 1527 | &uevent, filter_expression, filter, NULL, wpipe); |
f20baf8e DG |
1528 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1529 | goto error; | |
1530 | } | |
1531 | ||
1532 | /* The wild card * means that everything should be enabled. */ | |
1533 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
fefd409b | 1534 | ret = event_agent_enable_all(usess, agt, event, filter); |
f20baf8e | 1535 | } else { |
fefd409b | 1536 | ret = event_agent_enable(usess, agt, event, filter); |
f20baf8e DG |
1537 | } |
1538 | if (ret != LTTNG_OK) { | |
1539 | goto error; | |
1540 | } | |
1541 | ||
1542 | break; | |
1543 | } | |
2f77fc4b DG |
1544 | #if 0 |
1545 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1546 | case LTTNG_DOMAIN_UST_PID: | |
1547 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1548 | #endif | |
1549 | default: | |
f73fabfd | 1550 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1551 | goto error; |
1552 | } | |
1553 | ||
f73fabfd | 1554 | ret = LTTNG_OK; |
2f77fc4b DG |
1555 | |
1556 | error: | |
2223c96f | 1557 | rcu_read_unlock(); |
2f77fc4b DG |
1558 | return ret; |
1559 | } | |
1560 | ||
1561 | /* | |
1562 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1563 | */ | |
7972aab2 DG |
1564 | int cmd_enable_event_all(struct ltt_session *session, |
1565 | struct lttng_domain *domain, char *channel_name, int event_type, | |
6b453b5e | 1566 | char *filter_expression, |
025faf73 | 1567 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1568 | { |
1569 | int ret; | |
1570 | struct lttng_channel *attr; | |
1571 | ||
1572 | assert(session); | |
1573 | assert(channel_name); | |
1574 | ||
2223c96f DG |
1575 | rcu_read_lock(); |
1576 | ||
7972aab2 | 1577 | switch (domain->type) { |
2f77fc4b DG |
1578 | case LTTNG_DOMAIN_KERNEL: |
1579 | { | |
1580 | struct ltt_kernel_channel *kchan; | |
1581 | ||
1582 | assert(session->kernel_session); | |
1583 | ||
85076754 MD |
1584 | /* |
1585 | * If a non-default channel has been created in the | |
1586 | * session, explicitely require that -c chan_name needs | |
1587 | * to be provided. | |
1588 | */ | |
1589 | if (session->kernel_session->has_non_default_channel | |
1590 | && channel_name[0] == '\0') { | |
1591 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1592 | goto error; | |
1593 | } | |
1594 | ||
2f77fc4b DG |
1595 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1596 | session->kernel_session); | |
1597 | if (kchan == NULL) { | |
1598 | /* Create default channel */ | |
0a9c6494 DG |
1599 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1600 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1601 | if (attr == NULL) { |
f73fabfd | 1602 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1603 | goto error; |
1604 | } | |
1605 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1606 | ||
1607 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1608 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1609 | free(attr); |
1610 | goto error; | |
1611 | } | |
1612 | free(attr); | |
1613 | ||
1614 | /* Get the newly created kernel channel pointer */ | |
1615 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1616 | session->kernel_session); | |
1617 | assert(kchan); | |
1618 | } | |
1619 | ||
1620 | switch (event_type) { | |
1621 | case LTTNG_EVENT_SYSCALL: | |
d3a56674 | 1622 | ret = event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1623 | break; |
1624 | case LTTNG_EVENT_TRACEPOINT: | |
1625 | /* | |
1626 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1627 | * events already registered to the channel. | |
1628 | */ | |
d3a56674 | 1629 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1630 | break; |
1631 | case LTTNG_EVENT_ALL: | |
1632 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1633 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1634 | break; |
1635 | default: | |
f73fabfd | 1636 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1637 | goto error; |
1638 | } | |
1639 | ||
1640 | /* Manage return value */ | |
f73fabfd | 1641 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1642 | /* |
1643 | * On error, cmd_enable_channel call will take care of destroying | |
1644 | * the created channel if it was needed. | |
1645 | */ | |
2f77fc4b DG |
1646 | goto error; |
1647 | } | |
1648 | ||
1649 | kernel_wait_quiescent(kernel_tracer_fd); | |
1650 | break; | |
1651 | } | |
1652 | case LTTNG_DOMAIN_UST: | |
1653 | { | |
1654 | struct ltt_ust_channel *uchan; | |
1655 | struct ltt_ust_session *usess = session->ust_session; | |
1656 | ||
1657 | assert(usess); | |
1658 | ||
85076754 MD |
1659 | /* |
1660 | * If a non-default channel has been created in the | |
1661 | * session, explicitely require that -c chan_name needs | |
1662 | * to be provided. | |
1663 | */ | |
1664 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1665 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1666 | goto error; | |
1667 | } | |
1668 | ||
2f77fc4b DG |
1669 | /* Get channel from global UST domain */ |
1670 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1671 | channel_name); | |
1672 | if (uchan == NULL) { | |
1673 | /* Create default channel */ | |
0a9c6494 DG |
1674 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1675 | usess->buffer_type); | |
2f77fc4b | 1676 | if (attr == NULL) { |
f73fabfd | 1677 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1678 | goto error; |
1679 | } | |
1680 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1681 | ||
1682 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1683 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1684 | free(attr); |
1685 | goto error; | |
1686 | } | |
1687 | free(attr); | |
1688 | ||
1689 | /* Get the newly created channel reference back */ | |
1690 | uchan = trace_ust_find_channel_by_name( | |
1691 | usess->domain_global.channels, channel_name); | |
1692 | assert(uchan); | |
1693 | } | |
1694 | ||
1695 | /* At this point, the session and channel exist on the tracer */ | |
1696 | ||
1697 | switch (event_type) { | |
1698 | case LTTNG_EVENT_ALL: | |
1699 | case LTTNG_EVENT_TRACEPOINT: | |
6b453b5e JG |
1700 | ret = event_ust_enable_all_tracepoints(usess, uchan, |
1701 | filter_expression, filter); | |
f73fabfd | 1702 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1703 | goto error; |
1704 | } | |
1705 | break; | |
1706 | default: | |
f73fabfd | 1707 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1708 | goto error; |
1709 | } | |
1710 | ||
1711 | /* Manage return value */ | |
f73fabfd | 1712 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1713 | goto error; |
1714 | } | |
1715 | ||
f20baf8e DG |
1716 | break; |
1717 | } | |
5cdb6027 | 1718 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1719 | case LTTNG_DOMAIN_JUL: |
1720 | { | |
fefd409b | 1721 | struct agent *agt; |
b2064f54 | 1722 | struct lttng_event uevent, event; |
f20baf8e DG |
1723 | struct lttng_domain tmp_dom; |
1724 | struct ltt_ust_session *usess = session->ust_session; | |
1725 | ||
1726 | assert(usess); | |
1727 | ||
5cdb6027 | 1728 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 1729 | if (!agt) { |
5cdb6027 | 1730 | agt = agent_create(domain->type); |
fefd409b DG |
1731 | if (!agt) { |
1732 | ret = -LTTNG_ERR_NOMEM; | |
1733 | goto error; | |
1734 | } | |
1735 | agent_add(agt, usess->agents); | |
1736 | } | |
1737 | ||
022d91ba | 1738 | /* Create the default tracepoint. */ |
f20baf8e DG |
1739 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1740 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
f43f95a9 DG |
1741 | if (is_root) { |
1742 | strncpy(uevent.name, DEFAULT_SYS_JUL_EVENT_NAME, | |
1743 | sizeof(uevent.name)); | |
1744 | } else { | |
1745 | strncpy(uevent.name, DEFAULT_USER_JUL_EVENT_NAME, | |
1746 | sizeof(uevent.name)); | |
1747 | } | |
f20baf8e DG |
1748 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1749 | ||
1750 | /* | |
1751 | * The domain type is changed because we are about to enable the | |
1752 | * default channel and event for the JUL domain that are hardcoded. | |
1753 | * This happens in the UST domain. | |
1754 | */ | |
1755 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1756 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1757 | ||
1758 | ret = cmd_enable_event(session, &tmp_dom, DEFAULT_JUL_CHANNEL_NAME, | |
6b453b5e | 1759 | &uevent, NULL, NULL, NULL, wpipe); |
f20baf8e DG |
1760 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1761 | goto error; | |
1762 | } | |
1763 | ||
b2064f54 DG |
1764 | event.loglevel = LTTNG_LOGLEVEL_JUL_ALL; |
1765 | event.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
1766 | strncpy(event.name, "*", sizeof(event.name)); | |
1767 | event.name[sizeof(event.name) - 1] = '\0'; | |
1768 | ||
fefd409b | 1769 | ret = event_agent_enable_all(usess, agt, &event, filter); |
f20baf8e DG |
1770 | if (ret != LTTNG_OK) { |
1771 | goto error; | |
1772 | } | |
1773 | ||
2f77fc4b DG |
1774 | break; |
1775 | } | |
1776 | #if 0 | |
1777 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1778 | case LTTNG_DOMAIN_UST_PID: | |
1779 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1780 | #endif | |
1781 | default: | |
f73fabfd | 1782 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1783 | goto error; |
1784 | } | |
1785 | ||
f73fabfd | 1786 | ret = LTTNG_OK; |
2f77fc4b DG |
1787 | |
1788 | error: | |
2223c96f | 1789 | rcu_read_unlock(); |
2f77fc4b DG |
1790 | return ret; |
1791 | } | |
1792 | ||
1793 | ||
1794 | /* | |
1795 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1796 | */ | |
1797 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1798 | { | |
1799 | int ret; | |
1800 | ssize_t nb_events = 0; | |
1801 | ||
1802 | switch (domain) { | |
1803 | case LTTNG_DOMAIN_KERNEL: | |
1804 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1805 | if (nb_events < 0) { | |
f73fabfd | 1806 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1807 | goto error; |
1808 | } | |
1809 | break; | |
1810 | case LTTNG_DOMAIN_UST: | |
1811 | nb_events = ust_app_list_events(events); | |
1812 | if (nb_events < 0) { | |
f73fabfd | 1813 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1814 | goto error; |
1815 | } | |
1816 | break; | |
5cdb6027 | 1817 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 1818 | case LTTNG_DOMAIN_JUL: |
022d91ba | 1819 | nb_events = agent_list_events(events); |
3c6a091f DG |
1820 | if (nb_events < 0) { |
1821 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1822 | goto error; | |
1823 | } | |
1824 | break; | |
2f77fc4b | 1825 | default: |
f73fabfd | 1826 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1827 | goto error; |
1828 | } | |
1829 | ||
1830 | return nb_events; | |
1831 | ||
1832 | error: | |
1833 | /* Return negative value to differentiate return code */ | |
1834 | return -ret; | |
1835 | } | |
1836 | ||
1837 | /* | |
1838 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1839 | */ | |
1840 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1841 | struct lttng_event_field **fields) | |
1842 | { | |
1843 | int ret; | |
1844 | ssize_t nb_fields = 0; | |
1845 | ||
1846 | switch (domain) { | |
1847 | case LTTNG_DOMAIN_UST: | |
1848 | nb_fields = ust_app_list_event_fields(fields); | |
1849 | if (nb_fields < 0) { | |
f73fabfd | 1850 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1851 | goto error; |
1852 | } | |
1853 | break; | |
1854 | case LTTNG_DOMAIN_KERNEL: | |
1855 | default: /* fall-through */ | |
f73fabfd | 1856 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1857 | goto error; |
1858 | } | |
1859 | ||
1860 | return nb_fields; | |
1861 | ||
1862 | error: | |
1863 | /* Return negative value to differentiate return code */ | |
1864 | return -ret; | |
1865 | } | |
1866 | ||
1867 | /* | |
1868 | * Command LTTNG_START_TRACE processed by the client thread. | |
1869 | */ | |
1870 | int cmd_start_trace(struct ltt_session *session) | |
1871 | { | |
1872 | int ret; | |
cde3e505 | 1873 | unsigned long nb_chan = 0; |
2f77fc4b DG |
1874 | struct ltt_kernel_session *ksession; |
1875 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1876 | |
1877 | assert(session); | |
1878 | ||
1879 | /* Ease our life a bit ;) */ | |
1880 | ksession = session->kernel_session; | |
1881 | usess = session->ust_session; | |
1882 | ||
8382cf6f DG |
1883 | /* Is the session already started? */ |
1884 | if (session->active) { | |
f73fabfd | 1885 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1886 | goto error; |
1887 | } | |
1888 | ||
cde3e505 DG |
1889 | /* |
1890 | * Starting a session without channel is useless since after that it's not | |
1891 | * possible to enable channel thus inform the client. | |
1892 | */ | |
1893 | if (usess && usess->domain_global.channels) { | |
1894 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
1895 | } | |
1896 | if (ksession) { | |
1897 | nb_chan += ksession->channel_count; | |
1898 | } | |
1899 | if (!nb_chan) { | |
1900 | ret = LTTNG_ERR_NO_CHANNEL; | |
1901 | goto error; | |
1902 | } | |
1903 | ||
2f77fc4b DG |
1904 | /* Kernel tracing */ |
1905 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1906 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1907 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1908 | goto error; |
1909 | } | |
2f77fc4b DG |
1910 | } |
1911 | ||
1912 | /* Flag session that trace should start automatically */ | |
1913 | if (usess) { | |
14fb1ebe DG |
1914 | /* |
1915 | * Even though the start trace might fail, flag this session active so | |
1916 | * other application coming in are started by default. | |
1917 | */ | |
1918 | usess->active = 1; | |
2f77fc4b DG |
1919 | |
1920 | ret = ust_app_start_trace_all(usess); | |
1921 | if (ret < 0) { | |
f73fabfd | 1922 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1923 | goto error; |
1924 | } | |
1925 | } | |
1926 | ||
8382cf6f DG |
1927 | /* Flag this after a successful start. */ |
1928 | session->has_been_started = 1; | |
1929 | session->active = 1; | |
9b6c7ec5 | 1930 | |
f73fabfd | 1931 | ret = LTTNG_OK; |
2f77fc4b DG |
1932 | |
1933 | error: | |
1934 | return ret; | |
1935 | } | |
1936 | ||
1937 | /* | |
1938 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1939 | */ | |
1940 | int cmd_stop_trace(struct ltt_session *session) | |
1941 | { | |
1942 | int ret; | |
1943 | struct ltt_kernel_channel *kchan; | |
1944 | struct ltt_kernel_session *ksession; | |
1945 | struct ltt_ust_session *usess; | |
1946 | ||
1947 | assert(session); | |
1948 | ||
1949 | /* Short cut */ | |
1950 | ksession = session->kernel_session; | |
1951 | usess = session->ust_session; | |
1952 | ||
8382cf6f DG |
1953 | /* Session is not active. Skip everythong and inform the client. */ |
1954 | if (!session->active) { | |
f73fabfd | 1955 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1956 | goto error; |
1957 | } | |
1958 | ||
2f77fc4b | 1959 | /* Kernel tracer */ |
14fb1ebe | 1960 | if (ksession && ksession->active) { |
2f77fc4b DG |
1961 | DBG("Stop kernel tracing"); |
1962 | ||
1963 | /* Flush metadata if exist */ | |
1964 | if (ksession->metadata_stream_fd >= 0) { | |
1965 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1966 | if (ret < 0) { | |
1967 | ERR("Kernel metadata flush failed"); | |
1968 | } | |
1969 | } | |
1970 | ||
1971 | /* Flush all buffers before stopping */ | |
1972 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1973 | ret = kernel_flush_buffer(kchan); | |
1974 | if (ret < 0) { | |
1975 | ERR("Kernel flush buffer error"); | |
1976 | } | |
1977 | } | |
1978 | ||
1979 | ret = kernel_stop_session(ksession); | |
1980 | if (ret < 0) { | |
f73fabfd | 1981 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1982 | goto error; |
1983 | } | |
1984 | ||
1985 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 | 1986 | |
14fb1ebe | 1987 | ksession->active = 0; |
2f77fc4b DG |
1988 | } |
1989 | ||
14fb1ebe DG |
1990 | if (usess && usess->active) { |
1991 | /* | |
1992 | * Even though the stop trace might fail, flag this session inactive so | |
1993 | * other application coming in are not started by default. | |
1994 | */ | |
1995 | usess->active = 0; | |
2f77fc4b DG |
1996 | |
1997 | ret = ust_app_stop_trace_all(usess); | |
1998 | if (ret < 0) { | |
f73fabfd | 1999 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2000 | goto error; |
2001 | } | |
2002 | } | |
2003 | ||
8382cf6f DG |
2004 | /* Flag inactive after a successful stop. */ |
2005 | session->active = 0; | |
f73fabfd | 2006 | ret = LTTNG_OK; |
2f77fc4b DG |
2007 | |
2008 | error: | |
2009 | return ret; | |
2010 | } | |
2011 | ||
2012 | /* | |
2013 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2014 | */ | |
2015 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
2016 | size_t nb_uri, struct lttng_uri *uris) | |
2017 | { | |
2018 | int ret, i; | |
2019 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2020 | struct ltt_ust_session *usess = session->ust_session; | |
2021 | struct consumer_output *consumer = NULL; | |
2022 | ||
2023 | assert(session); | |
2024 | assert(uris); | |
2025 | assert(nb_uri > 0); | |
2026 | ||
8382cf6f DG |
2027 | /* Can't set consumer URI if the session is active. */ |
2028 | if (session->active) { | |
f73fabfd | 2029 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2030 | goto error; |
2031 | } | |
2032 | ||
2f77fc4b DG |
2033 | /* |
2034 | * This case switch makes sure the domain session has a temporary consumer | |
2035 | * so the URL can be set. | |
2036 | */ | |
2037 | switch (domain) { | |
2038 | case 0: | |
2039 | /* Code flow error. A session MUST always have a consumer object */ | |
2040 | assert(session->consumer); | |
2041 | /* | |
2042 | * The URL will be added to the tracing session consumer instead of a | |
2043 | * specific domain consumer. | |
2044 | */ | |
2045 | consumer = session->consumer; | |
2046 | break; | |
2047 | case LTTNG_DOMAIN_KERNEL: | |
2048 | /* Code flow error if we don't have a kernel session here. */ | |
2049 | assert(ksess); | |
785d2d0d DG |
2050 | assert(ksess->consumer); |
2051 | consumer = ksess->consumer; | |
2f77fc4b DG |
2052 | break; |
2053 | case LTTNG_DOMAIN_UST: | |
2054 | /* Code flow error if we don't have a kernel session here. */ | |
2055 | assert(usess); | |
785d2d0d DG |
2056 | assert(usess->consumer); |
2057 | consumer = usess->consumer; | |
2f77fc4b DG |
2058 | break; |
2059 | } | |
2060 | ||
2061 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b | 2062 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
a74934ba | 2063 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2064 | goto error; |
2065 | } | |
2f77fc4b DG |
2066 | } |
2067 | ||
7ab70fe0 DG |
2068 | /* |
2069 | * Make sure to set the session in output mode after we set URI since a | |
2070 | * session can be created without URL (thus flagged in no output mode). | |
2071 | */ | |
2072 | session->output_traces = 1; | |
2073 | if (ksess) { | |
2074 | ksess->output_traces = 1; | |
2075 | } else if (usess) { | |
2076 | usess->output_traces = 1; | |
2077 | } | |
2078 | ||
2f77fc4b | 2079 | /* All good! */ |
f73fabfd | 2080 | ret = LTTNG_OK; |
2f77fc4b DG |
2081 | |
2082 | error: | |
2083 | return ret; | |
2084 | } | |
2085 | ||
2086 | /* | |
2087 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2088 | */ | |
2089 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2090 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2091 | { |
2092 | int ret; | |
2f77fc4b DG |
2093 | struct ltt_session *session; |
2094 | ||
2095 | assert(name); | |
2bba9e53 | 2096 | assert(creds); |
785d2d0d | 2097 | |
2f77fc4b DG |
2098 | /* |
2099 | * Verify if the session already exist | |
2100 | * | |
2101 | * XXX: There is no need for the session lock list here since the caller | |
2102 | * (process_client_msg) is holding it. We might want to change that so a | |
2103 | * single command does not lock the entire session list. | |
2104 | */ | |
2105 | session = session_find_by_name(name); | |
2106 | if (session != NULL) { | |
f73fabfd | 2107 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2108 | goto find_error; |
2109 | } | |
2110 | ||
2111 | /* Create tracing session in the registry */ | |
dec56f6c | 2112 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2113 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2114 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2115 | goto session_error; |
2116 | } | |
2117 | ||
2118 | /* | |
2119 | * Get the newly created session pointer back | |
2120 | * | |
2121 | * XXX: There is no need for the session lock list here since the caller | |
2122 | * (process_client_msg) is holding it. We might want to change that so a | |
2123 | * single command does not lock the entire session list. | |
2124 | */ | |
2125 | session = session_find_by_name(name); | |
2126 | assert(session); | |
2127 | ||
ecc48a90 | 2128 | session->live_timer = live_timer; |
2f77fc4b DG |
2129 | /* Create default consumer output for the session not yet created. */ |
2130 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2131 | if (session->consumer == NULL) { | |
f73fabfd | 2132 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2133 | goto consumer_error; |
2134 | } | |
2135 | ||
2bba9e53 DG |
2136 | if (uris) { |
2137 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
2138 | if (ret != LTTNG_OK) { | |
2139 | goto consumer_error; | |
2140 | } | |
2141 | session->output_traces = 1; | |
2142 | } else { | |
2143 | session->output_traces = 0; | |
2144 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2145 | } |
2146 | ||
2147 | session->consumer->enabled = 1; | |
2148 | ||
f73fabfd | 2149 | return LTTNG_OK; |
2f77fc4b DG |
2150 | |
2151 | consumer_error: | |
2152 | session_destroy(session); | |
2153 | session_error: | |
2154 | find_error: | |
2155 | return ret; | |
2156 | } | |
2157 | ||
27babd3a DG |
2158 | /* |
2159 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2160 | */ | |
2161 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2162 | size_t nb_uri, lttng_sock_cred *creds) | |
2163 | { | |
2164 | int ret; | |
2165 | struct ltt_session *session; | |
2166 | struct snapshot_output *new_output = NULL; | |
2167 | ||
2168 | assert(name); | |
2169 | assert(creds); | |
2170 | ||
2171 | /* | |
2172 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2173 | * received are for a default snapshot output if one. | |
2174 | */ | |
ecc48a90 | 2175 | ret = cmd_create_session_uri(name, NULL, 0, creds, -1); |
27babd3a DG |
2176 | if (ret != LTTNG_OK) { |
2177 | goto error; | |
2178 | } | |
2179 | ||
2180 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2181 | session = session_find_by_name(name); | |
2182 | assert(session); | |
2183 | ||
2184 | /* Flag session for snapshot mode. */ | |
2185 | session->snapshot_mode = 1; | |
2186 | ||
2187 | /* Skip snapshot output creation if no URI is given. */ | |
2188 | if (nb_uri == 0) { | |
2189 | goto end; | |
2190 | } | |
2191 | ||
2192 | new_output = snapshot_output_alloc(); | |
2193 | if (!new_output) { | |
2194 | ret = LTTNG_ERR_NOMEM; | |
2195 | goto error_snapshot_alloc; | |
2196 | } | |
2197 | ||
2198 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2199 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2200 | if (ret < 0) { | |
2201 | if (ret == -ENOMEM) { | |
2202 | ret = LTTNG_ERR_NOMEM; | |
2203 | } else { | |
2204 | ret = LTTNG_ERR_INVALID; | |
2205 | } | |
2206 | goto error_snapshot; | |
2207 | } | |
2208 | ||
2209 | rcu_read_lock(); | |
2210 | snapshot_add_output(&session->snapshot, new_output); | |
2211 | rcu_read_unlock(); | |
2212 | ||
2213 | end: | |
2214 | return LTTNG_OK; | |
2215 | ||
2216 | error_snapshot: | |
2217 | snapshot_output_destroy(new_output); | |
2218 | error_snapshot_alloc: | |
2219 | session_destroy(session); | |
2220 | error: | |
2221 | return ret; | |
2222 | } | |
2223 | ||
2f77fc4b DG |
2224 | /* |
2225 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2226 | */ | |
2227 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2228 | { | |
2229 | int ret; | |
2230 | struct ltt_ust_session *usess; | |
2231 | struct ltt_kernel_session *ksess; | |
2232 | ||
2233 | /* Safety net */ | |
2234 | assert(session); | |
2235 | ||
2236 | usess = session->ust_session; | |
2237 | ksess = session->kernel_session; | |
2238 | ||
2239 | /* Clean kernel session teardown */ | |
2240 | kernel_destroy_session(ksess); | |
2241 | ||
2242 | /* UST session teardown */ | |
2243 | if (usess) { | |
2244 | /* Close any relayd session */ | |
2245 | consumer_output_send_destroy_relayd(usess->consumer); | |
2246 | ||
2247 | /* Destroy every UST application related to this session. */ | |
2248 | ret = ust_app_destroy_trace_all(usess); | |
2249 | if (ret) { | |
2250 | ERR("Error in ust_app_destroy_trace_all"); | |
2251 | } | |
2252 | ||
2253 | /* Clean up the rest. */ | |
2254 | trace_ust_destroy_session(usess); | |
2255 | } | |
2256 | ||
2257 | /* | |
2258 | * Must notify the kernel thread here to update it's poll set in order to | |
2259 | * remove the channel(s)' fd just destroyed. | |
2260 | */ | |
2261 | ret = notify_thread_pipe(wpipe); | |
2262 | if (ret < 0) { | |
2263 | PERROR("write kernel poll pipe"); | |
2264 | } | |
2265 | ||
2266 | ret = session_destroy(session); | |
2267 | ||
2268 | return ret; | |
2269 | } | |
2270 | ||
2271 | /* | |
2272 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2273 | */ | |
2274 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2275 | { | |
2276 | int ret; | |
2277 | ||
2278 | switch (domain) { | |
2279 | case LTTNG_DOMAIN_KERNEL: | |
2280 | { | |
2281 | struct lttng_kernel_calibrate kcalibrate; | |
2282 | ||
2e84128e DG |
2283 | switch (calibrate->type) { |
2284 | case LTTNG_CALIBRATE_FUNCTION: | |
2285 | default: | |
2286 | /* Default and only possible calibrate option. */ | |
2287 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2288 | break; | |
2289 | } | |
2290 | ||
2f77fc4b DG |
2291 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2292 | if (ret < 0) { | |
f73fabfd | 2293 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2294 | goto error; |
2295 | } | |
2296 | break; | |
2297 | } | |
2298 | case LTTNG_DOMAIN_UST: | |
2299 | { | |
2300 | struct lttng_ust_calibrate ucalibrate; | |
2301 | ||
2e84128e DG |
2302 | switch (calibrate->type) { |
2303 | case LTTNG_CALIBRATE_FUNCTION: | |
2304 | default: | |
2305 | /* Default and only possible calibrate option. */ | |
2306 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2307 | break; | |
2308 | } | |
2309 | ||
2f77fc4b DG |
2310 | ret = ust_app_calibrate_glb(&ucalibrate); |
2311 | if (ret < 0) { | |
f73fabfd | 2312 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2313 | goto error; |
2314 | } | |
2315 | break; | |
2316 | } | |
2317 | default: | |
f73fabfd | 2318 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2319 | goto error; |
2320 | } | |
2321 | ||
f73fabfd | 2322 | ret = LTTNG_OK; |
2f77fc4b DG |
2323 | |
2324 | error: | |
2325 | return ret; | |
2326 | } | |
2327 | ||
2328 | /* | |
2329 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2330 | */ | |
2331 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2332 | const char *sock_path, struct consumer_data *cdata) | |
2333 | { | |
2334 | int ret, sock; | |
dd81b457 | 2335 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2336 | |
2337 | assert(session); | |
2338 | assert(cdata); | |
2339 | assert(sock_path); | |
2340 | ||
2341 | switch (domain) { | |
2342 | case LTTNG_DOMAIN_KERNEL: | |
2343 | { | |
2344 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2345 | ||
2346 | assert(ksess); | |
2347 | ||
2348 | /* Can't register a consumer if there is already one */ | |
2349 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2350 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2351 | goto error; |
2352 | } | |
2353 | ||
2354 | sock = lttcomm_connect_unix_sock(sock_path); | |
2355 | if (sock < 0) { | |
f73fabfd | 2356 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2357 | goto error; |
2358 | } | |
4ce514c4 | 2359 | cdata->cmd_sock = sock; |
2f77fc4b | 2360 | |
4ce514c4 | 2361 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2362 | if (socket == NULL) { |
f66c074c DG |
2363 | ret = close(sock); |
2364 | if (ret < 0) { | |
2365 | PERROR("close register consumer"); | |
2366 | } | |
4ce514c4 | 2367 | cdata->cmd_sock = -1; |
f73fabfd | 2368 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2369 | goto error; |
2370 | } | |
2371 | ||
2372 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2373 | if (socket->lock == NULL) { | |
2374 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2375 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2376 | goto error; |
2377 | } | |
2378 | pthread_mutex_init(socket->lock, NULL); | |
2379 | socket->registered = 1; | |
2380 | ||
2381 | rcu_read_lock(); | |
2382 | consumer_add_socket(socket, ksess->consumer); | |
2383 | rcu_read_unlock(); | |
2384 | ||
2385 | pthread_mutex_lock(&cdata->pid_mutex); | |
2386 | cdata->pid = -1; | |
2387 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2388 | ||
2389 | break; | |
2390 | } | |
2391 | default: | |
2392 | /* TODO: Userspace tracing */ | |
f73fabfd | 2393 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2394 | goto error; |
2395 | } | |
2396 | ||
dd81b457 | 2397 | return LTTNG_OK; |
2f77fc4b DG |
2398 | |
2399 | error: | |
dd81b457 DG |
2400 | if (socket) { |
2401 | consumer_destroy_socket(socket); | |
2402 | } | |
2f77fc4b DG |
2403 | return ret; |
2404 | } | |
2405 | ||
2406 | /* | |
2407 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2408 | */ | |
2409 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2410 | struct lttng_domain **domains) | |
2411 | { | |
2412 | int ret, index = 0; | |
2413 | ssize_t nb_dom = 0; | |
fefd409b DG |
2414 | struct agent *agt; |
2415 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2416 | |
2417 | if (session->kernel_session != NULL) { | |
2418 | DBG3("Listing domains found kernel domain"); | |
2419 | nb_dom++; | |
2420 | } | |
2421 | ||
2422 | if (session->ust_session != NULL) { | |
2423 | DBG3("Listing domains found UST global domain"); | |
2424 | nb_dom++; | |
3c6a091f | 2425 | |
fefd409b DG |
2426 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2427 | agt, node.node) { | |
2428 | if (agt->being_used) { | |
2429 | nb_dom++; | |
2430 | } | |
3c6a091f | 2431 | } |
2f77fc4b DG |
2432 | } |
2433 | ||
2434 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
2435 | if (*domains == NULL) { | |
f73fabfd | 2436 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2437 | goto error; |
2438 | } | |
2439 | ||
2440 | if (session->kernel_session != NULL) { | |
2441 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
2442 | index++; | |
2443 | } | |
2444 | ||
2445 | if (session->ust_session != NULL) { | |
2446 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2447 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2448 | index++; |
3c6a091f | 2449 | |
fefd409b DG |
2450 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2451 | agt, node.node) { | |
2452 | if (agt->being_used) { | |
2453 | (*domains)[index].type = agt->domain; | |
2454 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2455 | index++; | |
2456 | } | |
3c6a091f | 2457 | } |
2f77fc4b DG |
2458 | } |
2459 | ||
2460 | return nb_dom; | |
2461 | ||
2462 | error: | |
f73fabfd DG |
2463 | /* Return negative value to differentiate return code */ |
2464 | return -ret; | |
2f77fc4b DG |
2465 | } |
2466 | ||
2467 | ||
2468 | /* | |
2469 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2470 | */ | |
2471 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2472 | struct lttng_channel **channels) | |
2473 | { | |
2474 | int ret; | |
2475 | ssize_t nb_chan = 0; | |
2476 | ||
2477 | switch (domain) { | |
2478 | case LTTNG_DOMAIN_KERNEL: | |
2479 | if (session->kernel_session != NULL) { | |
2480 | nb_chan = session->kernel_session->channel_count; | |
2481 | } | |
2482 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2483 | if (nb_chan <= 0) { |
2484 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2485 | } | |
2f77fc4b DG |
2486 | break; |
2487 | case LTTNG_DOMAIN_UST: | |
2488 | if (session->ust_session != NULL) { | |
2489 | nb_chan = lttng_ht_get_count( | |
2490 | session->ust_session->domain_global.channels); | |
2491 | } | |
2492 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
2493 | if (nb_chan <= 0) { |
2494 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2495 | } | |
2f77fc4b DG |
2496 | break; |
2497 | default: | |
2498 | *channels = NULL; | |
f73fabfd | 2499 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2500 | goto error; |
2501 | } | |
2502 | ||
2503 | if (nb_chan > 0) { | |
2504 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2505 | if (*channels == NULL) { | |
f73fabfd | 2506 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2507 | goto error; |
2508 | } | |
2509 | ||
2510 | list_lttng_channels(domain, session, *channels); | |
2511 | } else { | |
2512 | *channels = NULL; | |
c7d620a2 DG |
2513 | /* Ret value was set in the domain switch case */ |
2514 | goto error; | |
2f77fc4b DG |
2515 | } |
2516 | ||
2517 | return nb_chan; | |
2518 | ||
2519 | error: | |
f73fabfd DG |
2520 | /* Return negative value to differentiate return code */ |
2521 | return -ret; | |
2f77fc4b DG |
2522 | } |
2523 | ||
2524 | /* | |
2525 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2526 | */ | |
2527 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2528 | char *channel_name, struct lttng_event **events) | |
2529 | { | |
2530 | int ret = 0; | |
2531 | ssize_t nb_event = 0; | |
2532 | ||
2533 | switch (domain) { | |
2534 | case LTTNG_DOMAIN_KERNEL: | |
2535 | if (session->kernel_session != NULL) { | |
2536 | nb_event = list_lttng_kernel_events(channel_name, | |
2537 | session->kernel_session, events); | |
2538 | } | |
2539 | break; | |
2540 | case LTTNG_DOMAIN_UST: | |
2541 | { | |
2542 | if (session->ust_session != NULL) { | |
2543 | nb_event = list_lttng_ust_global_events(channel_name, | |
2544 | &session->ust_session->domain_global, events); | |
2545 | } | |
2546 | break; | |
2547 | } | |
5cdb6027 | 2548 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f DG |
2549 | case LTTNG_DOMAIN_JUL: |
2550 | if (session->ust_session) { | |
fefd409b DG |
2551 | struct lttng_ht_iter iter; |
2552 | struct agent *agt; | |
2553 | ||
2554 | cds_lfht_for_each_entry(session->ust_session->agents->ht, | |
2555 | &iter.iter, agt, node.node) { | |
2556 | nb_event = list_lttng_agent_events(agt, events); | |
2557 | } | |
3c6a091f DG |
2558 | } |
2559 | break; | |
2f77fc4b | 2560 | default: |
f73fabfd | 2561 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2562 | goto error; |
2563 | } | |
2564 | ||
f73fabfd | 2565 | return nb_event; |
2f77fc4b DG |
2566 | |
2567 | error: | |
f73fabfd DG |
2568 | /* Return negative value to differentiate return code */ |
2569 | return -ret; | |
2f77fc4b DG |
2570 | } |
2571 | ||
2572 | /* | |
2573 | * Using the session list, filled a lttng_session array to send back to the | |
2574 | * client for session listing. | |
2575 | * | |
2576 | * The session list lock MUST be acquired before calling this function. Use | |
2577 | * session_lock_list() and session_unlock_list(). | |
2578 | */ | |
2579 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2580 | gid_t gid) | |
2581 | { | |
2582 | int ret; | |
2583 | unsigned int i = 0; | |
2584 | struct ltt_session *session; | |
2585 | struct ltt_session_list *list = session_get_list(); | |
2586 | ||
2587 | DBG("Getting all available session for UID %d GID %d", | |
2588 | uid, gid); | |
2589 | /* | |
2590 | * Iterate over session list and append data after the control struct in | |
2591 | * the buffer. | |
2592 | */ | |
2593 | cds_list_for_each_entry(session, &list->head, list) { | |
2594 | /* | |
2595 | * Only list the sessions the user can control. | |
2596 | */ | |
2597 | if (!session_access_ok(session, uid, gid)) { | |
2598 | continue; | |
2599 | } | |
2600 | ||
2601 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2602 | struct ltt_ust_session *usess = session->ust_session; | |
2603 | ||
2604 | if (session->consumer->type == CONSUMER_DST_NET || | |
2605 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2606 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2607 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2608 | sizeof(sessions[i].path), session); |
2f77fc4b | 2609 | } else { |
dec56f6c | 2610 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2611 | session->consumer->dst.trace_path); |
2612 | } | |
2613 | if (ret < 0) { | |
2614 | PERROR("snprintf session path"); | |
2615 | continue; | |
2616 | } | |
2617 | ||
2618 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2619 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 2620 | sessions[i].enabled = session->active; |
2cbf8fed | 2621 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 2622 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
2623 | i++; |
2624 | } | |
2625 | } | |
2626 | ||
806e2684 | 2627 | /* |
6d805429 | 2628 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2629 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2630 | */ |
6d805429 | 2631 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2632 | { |
2633 | int ret; | |
2634 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2635 | struct ltt_ust_session *usess = session->ust_session; | |
2636 | ||
2637 | assert(session); | |
2638 | ||
2639 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 2640 | if (session->active) { |
806e2684 DG |
2641 | ret = LTTNG_ERR_SESSION_STARTED; |
2642 | goto error; | |
3a89d11a DG |
2643 | } else { |
2644 | /* | |
2645 | * If stopped, just make sure we've started before else the above call | |
2646 | * will always send that there is data pending. | |
2647 | * | |
2648 | * The consumer assumes that when the data pending command is received, | |
2649 | * the trace has been started before or else no output data is written | |
2650 | * by the streams which is a condition for data pending. So, this is | |
2651 | * *VERY* important that we don't ask the consumer before a start | |
2652 | * trace. | |
2653 | */ | |
8382cf6f | 2654 | if (!session->has_been_started) { |
3a89d11a DG |
2655 | ret = 0; |
2656 | goto error; | |
2657 | } | |
806e2684 DG |
2658 | } |
2659 | ||
2660 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2661 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2662 | if (ret == 1) { | |
806e2684 DG |
2663 | /* Data is still being extracted for the kernel. */ |
2664 | goto error; | |
2665 | } | |
2666 | } | |
2667 | ||
2668 | if (usess && usess->consumer) { | |
6d805429 DG |
2669 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2670 | if (ret == 1) { | |
806e2684 DG |
2671 | /* Data is still being extracted for the kernel. */ |
2672 | goto error; | |
2673 | } | |
2674 | } | |
2675 | ||
2676 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2677 | ret = 0; |
806e2684 DG |
2678 | |
2679 | error: | |
2680 | return ret; | |
2681 | } | |
2682 | ||
6dc3064a DG |
2683 | /* |
2684 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2685 | * | |
2686 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2687 | */ | |
2688 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2689 | struct lttng_snapshot_output *output, uint32_t *id) | |
2690 | { | |
2691 | int ret; | |
2692 | struct snapshot_output *new_output; | |
2693 | ||
2694 | assert(session); | |
2695 | assert(output); | |
2696 | ||
2697 | DBG("Cmd snapshot add output for session %s", session->name); | |
2698 | ||
2699 | /* | |
d3f14b8a MD |
2700 | * Permission denied to create an output if the session is not |
2701 | * set in no output mode. | |
6dc3064a DG |
2702 | */ |
2703 | if (session->output_traces) { | |
2704 | ret = LTTNG_ERR_EPERM; | |
2705 | goto error; | |
2706 | } | |
2707 | ||
2708 | /* Only one output is allowed until we have the "tee" feature. */ | |
2709 | if (session->snapshot.nb_output == 1) { | |
2710 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2711 | goto error; | |
2712 | } | |
2713 | ||
2714 | new_output = snapshot_output_alloc(); | |
2715 | if (!new_output) { | |
2716 | ret = LTTNG_ERR_NOMEM; | |
2717 | goto error; | |
2718 | } | |
2719 | ||
2720 | ret = snapshot_output_init(output->max_size, output->name, | |
2721 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2722 | &session->snapshot); | |
2723 | if (ret < 0) { | |
2724 | if (ret == -ENOMEM) { | |
2725 | ret = LTTNG_ERR_NOMEM; | |
2726 | } else { | |
2727 | ret = LTTNG_ERR_INVALID; | |
2728 | } | |
2729 | goto free_error; | |
2730 | } | |
2731 | ||
6dc3064a DG |
2732 | rcu_read_lock(); |
2733 | snapshot_add_output(&session->snapshot, new_output); | |
2734 | if (id) { | |
2735 | *id = new_output->id; | |
2736 | } | |
2737 | rcu_read_unlock(); | |
2738 | ||
2739 | return LTTNG_OK; | |
2740 | ||
2741 | free_error: | |
2742 | snapshot_output_destroy(new_output); | |
2743 | error: | |
2744 | return ret; | |
2745 | } | |
2746 | ||
2747 | /* | |
2748 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2749 | * | |
2750 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2751 | */ | |
2752 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2753 | struct lttng_snapshot_output *output) | |
2754 | { | |
2755 | int ret; | |
eb240553 | 2756 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2757 | |
2758 | assert(session); | |
2759 | assert(output); | |
2760 | ||
6dc3064a DG |
2761 | rcu_read_lock(); |
2762 | ||
2763 | /* | |
d3f14b8a MD |
2764 | * Permission denied to create an output if the session is not |
2765 | * set in no output mode. | |
6dc3064a DG |
2766 | */ |
2767 | if (session->output_traces) { | |
2768 | ret = LTTNG_ERR_EPERM; | |
2769 | goto error; | |
2770 | } | |
2771 | ||
eb240553 DG |
2772 | if (output->id) { |
2773 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2774 | session->name); | |
2775 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2776 | } else if (*output->name != '\0') { | |
2777 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2778 | session->name); | |
2779 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2780 | } | |
6dc3064a DG |
2781 | if (!sout) { |
2782 | ret = LTTNG_ERR_INVALID; | |
2783 | goto error; | |
2784 | } | |
2785 | ||
2786 | snapshot_delete_output(&session->snapshot, sout); | |
2787 | snapshot_output_destroy(sout); | |
2788 | ret = LTTNG_OK; | |
2789 | ||
2790 | error: | |
2791 | rcu_read_unlock(); | |
2792 | return ret; | |
2793 | } | |
2794 | ||
2795 | /* | |
2796 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2797 | * | |
2798 | * If no output is available, outputs is untouched and 0 is returned. | |
2799 | * | |
2800 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2801 | */ | |
2802 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2803 | struct lttng_snapshot_output **outputs) | |
2804 | { | |
2805 | int ret, idx = 0; | |
2806 | struct lttng_snapshot_output *list; | |
2807 | struct lttng_ht_iter iter; | |
2808 | struct snapshot_output *output; | |
2809 | ||
2810 | assert(session); | |
2811 | assert(outputs); | |
2812 | ||
2813 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2814 | ||
2815 | /* | |
d3f14b8a MD |
2816 | * Permission denied to create an output if the session is not |
2817 | * set in no output mode. | |
6dc3064a DG |
2818 | */ |
2819 | if (session->output_traces) { | |
2820 | ret = LTTNG_ERR_EPERM; | |
2821 | goto error; | |
2822 | } | |
2823 | ||
2824 | if (session->snapshot.nb_output == 0) { | |
2825 | ret = 0; | |
2826 | goto error; | |
2827 | } | |
2828 | ||
2829 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2830 | if (!list) { | |
2831 | ret = LTTNG_ERR_NOMEM; | |
2832 | goto error; | |
2833 | } | |
2834 | ||
2835 | /* Copy list from session to the new list object. */ | |
2836 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, | |
2837 | output, node.node) { | |
2838 | assert(output->consumer); | |
2839 | list[idx].id = output->id; | |
2840 | list[idx].max_size = output->max_size; | |
2841 | strncpy(list[idx].name, output->name, sizeof(list[idx].name)); | |
2842 | if (output->consumer->type == CONSUMER_DST_LOCAL) { | |
2843 | strncpy(list[idx].ctrl_url, output->consumer->dst.trace_path, | |
2844 | sizeof(list[idx].ctrl_url)); | |
2845 | } else { | |
2846 | /* Control URI. */ | |
2847 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
2848 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
2849 | if (ret < 0) { | |
2850 | ret = LTTNG_ERR_NOMEM; | |
2851 | goto free_error; | |
2852 | } | |
2853 | ||
2854 | /* Data URI. */ | |
2855 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
2856 | list[idx].data_url, sizeof(list[idx].data_url)); | |
2857 | if (ret < 0) { | |
2858 | ret = LTTNG_ERR_NOMEM; | |
2859 | goto free_error; | |
2860 | } | |
2861 | } | |
2862 | idx++; | |
2863 | } | |
2864 | ||
2865 | *outputs = list; | |
2866 | return session->snapshot.nb_output; | |
2867 | ||
2868 | free_error: | |
2869 | free(list); | |
2870 | error: | |
2871 | return -ret; | |
2872 | } | |
2873 | ||
2874 | /* | |
2875 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
2876 | * snapshot output is *not* set with a remote destination. | |
2877 | * | |
a934f4af | 2878 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2879 | */ |
2880 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
2881 | struct snapshot_output *snap_output, struct ltt_session *session) | |
2882 | { | |
a934f4af | 2883 | int ret = LTTNG_OK; |
6dc3064a DG |
2884 | struct lttng_ht_iter iter; |
2885 | struct consumer_socket *socket; | |
2886 | ||
2887 | assert(consumer); | |
2888 | assert(snap_output); | |
2889 | assert(session); | |
2890 | ||
2891 | DBG2("Set relayd object from snapshot output"); | |
2892 | ||
2893 | /* Ignore if snapshot consumer output is not network. */ | |
2894 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
2895 | goto error; | |
2896 | } | |
2897 | ||
2898 | /* | |
2899 | * For each consumer socket, create and send the relayd object of the | |
2900 | * snapshot output. | |
2901 | */ | |
2902 | rcu_read_lock(); | |
5eecee74 DG |
2903 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
2904 | socket, node.node) { | |
6dc3064a | 2905 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
2906 | snap_output->consumer, socket, |
2907 | session->name, session->hostname, | |
2908 | session->live_timer); | |
a934f4af | 2909 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2910 | rcu_read_unlock(); |
2911 | goto error; | |
2912 | } | |
2913 | } | |
2914 | rcu_read_unlock(); | |
2915 | ||
2916 | error: | |
2917 | return ret; | |
2918 | } | |
2919 | ||
2920 | /* | |
2921 | * Record a kernel snapshot. | |
2922 | * | |
fac41e72 | 2923 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
2924 | */ |
2925 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded | 2926 | struct snapshot_output *output, struct ltt_session *session, |
68808f4e | 2927 | int wait, uint64_t max_stream_size) |
6dc3064a DG |
2928 | { |
2929 | int ret; | |
2930 | ||
2931 | assert(ksess); | |
2932 | assert(output); | |
2933 | assert(session); | |
2934 | ||
10a50311 JD |
2935 | /* Get the datetime for the snapshot output directory. */ |
2936 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2937 | sizeof(output->datetime)); | |
2938 | if (!ret) { | |
a934f4af | 2939 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2940 | goto error; |
2941 | } | |
2942 | ||
af706bb7 DG |
2943 | /* |
2944 | * Copy kernel session sockets so we can communicate with the right | |
2945 | * consumer for the snapshot record command. | |
2946 | */ | |
2947 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
2948 | if (ret < 0) { | |
a934f4af | 2949 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2950 | goto error; |
6dc3064a DG |
2951 | } |
2952 | ||
2953 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 2954 | if (ret != LTTNG_OK) { |
af706bb7 | 2955 | goto error_snapshot; |
6dc3064a DG |
2956 | } |
2957 | ||
68808f4e | 2958 | ret = kernel_snapshot_record(ksess, output, wait, max_stream_size); |
2a06df8d | 2959 | if (ret != LTTNG_OK) { |
af706bb7 | 2960 | goto error_snapshot; |
6dc3064a DG |
2961 | } |
2962 | ||
a934f4af DG |
2963 | ret = LTTNG_OK; |
2964 | ||
af706bb7 DG |
2965 | error_snapshot: |
2966 | /* Clean up copied sockets so this output can use some other later on. */ | |
2967 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
2968 | error: |
2969 | return ret; | |
2970 | } | |
2971 | ||
2972 | /* | |
2973 | * Record a UST snapshot. | |
2974 | * | |
a934f4af | 2975 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
2976 | */ |
2977 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 2978 | struct snapshot_output *output, struct ltt_session *session, |
68808f4e | 2979 | int wait, uint64_t max_stream_size) |
6dc3064a DG |
2980 | { |
2981 | int ret; | |
2982 | ||
2983 | assert(usess); | |
2984 | assert(output); | |
2985 | assert(session); | |
2986 | ||
10a50311 JD |
2987 | /* Get the datetime for the snapshot output directory. */ |
2988 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2989 | sizeof(output->datetime)); | |
2990 | if (!ret) { | |
a934f4af | 2991 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2992 | goto error; |
2993 | } | |
2994 | ||
af706bb7 | 2995 | /* |
d3f14b8a | 2996 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
2997 | * consumer for the snapshot record command. |
2998 | */ | |
2999 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
3000 | if (ret < 0) { | |
a934f4af | 3001 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3002 | goto error; |
6dc3064a DG |
3003 | } |
3004 | ||
3005 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 3006 | if (ret != LTTNG_OK) { |
af706bb7 | 3007 | goto error_snapshot; |
6dc3064a DG |
3008 | } |
3009 | ||
68808f4e | 3010 | ret = ust_app_snapshot_record(usess, output, wait, max_stream_size); |
6dc3064a | 3011 | if (ret < 0) { |
7badf927 DG |
3012 | switch (-ret) { |
3013 | case EINVAL: | |
a934f4af | 3014 | ret = LTTNG_ERR_INVALID; |
7badf927 DG |
3015 | break; |
3016 | case ENODATA: | |
3017 | ret = LTTNG_ERR_SNAPSHOT_NODATA; | |
3018 | break; | |
3019 | default: | |
3020 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
3021 | break; | |
5c786ded | 3022 | } |
af706bb7 | 3023 | goto error_snapshot; |
6dc3064a DG |
3024 | } |
3025 | ||
a934f4af DG |
3026 | ret = LTTNG_OK; |
3027 | ||
af706bb7 DG |
3028 | error_snapshot: |
3029 | /* Clean up copied sockets so this output can use some other later on. */ | |
3030 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
3031 | error: |
3032 | return ret; | |
3033 | } | |
3034 | ||
68808f4e DG |
3035 | /* |
3036 | * Return the biggest subbuffer size of all channels in the given session. | |
3037 | */ | |
3038 | static uint64_t get_session_max_subbuf_size(struct ltt_session *session) | |
3039 | { | |
3040 | uint64_t max_size = 0; | |
3041 | ||
3042 | assert(session); | |
3043 | ||
3044 | if (session->kernel_session) { | |
3045 | struct ltt_kernel_channel *chan; | |
3046 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3047 | ||
3048 | /* | |
3049 | * For each channel, add to the max size the size of each subbuffer | |
3050 | * multiplied by their sized. | |
3051 | */ | |
3052 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { | |
3053 | if (chan->channel->attr.subbuf_size > max_size) { | |
3054 | max_size = chan->channel->attr.subbuf_size; | |
3055 | } | |
3056 | } | |
3057 | } | |
3058 | ||
3059 | if (session->ust_session) { | |
3060 | struct lttng_ht_iter iter; | |
3061 | struct ltt_ust_channel *uchan; | |
3062 | struct ltt_ust_session *usess = session->ust_session; | |
3063 | ||
3064 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, | |
3065 | uchan, node.node) { | |
3066 | if (uchan->attr.subbuf_size > max_size) { | |
3067 | max_size = uchan->attr.subbuf_size; | |
3068 | } | |
3069 | } | |
3070 | } | |
3071 | ||
3072 | return max_size; | |
3073 | } | |
3074 | ||
5c786ded JD |
3075 | /* |
3076 | * Returns the total number of streams for a session or a negative value | |
3077 | * on error. | |
3078 | */ | |
68808f4e | 3079 | static unsigned int get_session_nb_streams(struct ltt_session *session) |
5c786ded JD |
3080 | { |
3081 | unsigned int total_streams = 0; | |
3082 | ||
3083 | if (session->kernel_session) { | |
3084 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3085 | ||
3086 | total_streams += ksess->stream_count_global; | |
3087 | } | |
3088 | ||
3089 | if (session->ust_session) { | |
3090 | struct ltt_ust_session *usess = session->ust_session; | |
3091 | ||
3092 | total_streams += ust_app_get_nb_stream(usess); | |
3093 | } | |
3094 | ||
3095 | return total_streams; | |
3096 | } | |
3097 | ||
6dc3064a DG |
3098 | /* |
3099 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3100 | * | |
3101 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3102 | * complete before returning. | |
3103 | * | |
3104 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3105 | */ | |
3106 | int cmd_snapshot_record(struct ltt_session *session, | |
3107 | struct lttng_snapshot_output *output, int wait) | |
3108 | { | |
3109 | int ret = LTTNG_OK; | |
e1986656 DG |
3110 | unsigned int use_tmp_output = 0; |
3111 | struct snapshot_output tmp_output; | |
1bfe7328 | 3112 | unsigned int nb_streams, snapshot_success = 0; |
68808f4e | 3113 | uint64_t session_max_size = 0, max_stream_size = 0; |
6dc3064a DG |
3114 | |
3115 | assert(session); | |
3116 | ||
3117 | DBG("Cmd snapshot record for session %s", session->name); | |
3118 | ||
3119 | /* | |
d3f14b8a MD |
3120 | * Permission denied to create an output if the session is not |
3121 | * set in no output mode. | |
6dc3064a DG |
3122 | */ |
3123 | if (session->output_traces) { | |
3124 | ret = LTTNG_ERR_EPERM; | |
3125 | goto error; | |
3126 | } | |
3127 | ||
3128 | /* The session needs to be started at least once. */ | |
8382cf6f | 3129 | if (!session->has_been_started) { |
6dc3064a DG |
3130 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3131 | goto error; | |
3132 | } | |
3133 | ||
3134 | /* Use temporary output for the session. */ | |
3135 | if (output && *output->ctrl_url != '\0') { | |
6dc3064a DG |
3136 | ret = snapshot_output_init(output->max_size, output->name, |
3137 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3138 | &tmp_output, NULL); |
6dc3064a DG |
3139 | if (ret < 0) { |
3140 | if (ret == -ENOMEM) { | |
3141 | ret = LTTNG_ERR_NOMEM; | |
3142 | } else { | |
3143 | ret = LTTNG_ERR_INVALID; | |
3144 | } | |
3145 | goto error; | |
3146 | } | |
1bfe7328 DG |
3147 | /* Use the global session count for the temporary snapshot. */ |
3148 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
e1986656 | 3149 | use_tmp_output = 1; |
6dc3064a DG |
3150 | } |
3151 | ||
5c786ded | 3152 | /* |
68808f4e DG |
3153 | * Get the session maximum size for a snapshot meaning it will compute the |
3154 | * size of all streams from all domain. | |
3155 | */ | |
3156 | max_stream_size = get_session_max_subbuf_size(session); | |
3157 | ||
3158 | nb_streams = get_session_nb_streams(session); | |
3159 | if (nb_streams) { | |
3160 | /* | |
3161 | * The maximum size of the snapshot is the number of streams multiplied | |
3162 | * by the biggest subbuf size of all channels in a session which is the | |
3163 | * maximum stream size available for each stream. The session max size | |
3164 | * is now checked against the snapshot max size value given by the user | |
3165 | * and if lower, an error is returned. | |
3166 | */ | |
3167 | session_max_size = max_stream_size * nb_streams; | |
3168 | } | |
3169 | ||
3170 | DBG3("Snapshot max size is %" PRIu64 " for max stream size of %" PRIu64, | |
3171 | session_max_size, max_stream_size); | |
3172 | ||
3173 | /* | |
3174 | * If we use a temporary output, check right away if the max size fits else | |
3175 | * for each output the max size will be checked. | |
5c786ded | 3176 | */ |
68808f4e DG |
3177 | if (use_tmp_output && |
3178 | (tmp_output.max_size != 0 && | |
3179 | tmp_output.max_size < session_max_size)) { | |
3180 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3181 | goto error; | |
3182 | } | |
5c786ded | 3183 | |
6dc3064a DG |
3184 | if (session->kernel_session) { |
3185 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3186 | ||
e1986656 DG |
3187 | if (use_tmp_output) { |
3188 | ret = record_kernel_snapshot(ksess, &tmp_output, session, | |
68808f4e | 3189 | wait, max_stream_size); |
a934f4af | 3190 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3191 | goto error; |
3192 | } | |
1bfe7328 | 3193 | snapshot_success = 1; |
6dc3064a DG |
3194 | } else { |
3195 | struct snapshot_output *sout; | |
3196 | struct lttng_ht_iter iter; | |
3197 | ||
3198 | rcu_read_lock(); | |
3199 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3200 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3201 | /* |
3202 | * Make a local copy of the output and assign the possible | |
3203 | * temporary value given by the caller. | |
3204 | */ | |
3205 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3206 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3207 | ||
3208 | /* Use temporary max size. */ | |
3209 | if (output->max_size != (uint64_t) -1ULL) { | |
3210 | tmp_output.max_size = output->max_size; | |
3211 | } | |
3212 | ||
68808f4e DG |
3213 | if (tmp_output.max_size != 0 && |
3214 | tmp_output.max_size < session_max_size) { | |
3215 | rcu_read_unlock(); | |
3216 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3217 | goto error; | |
3218 | } | |
3219 | ||
e1986656 DG |
3220 | /* Use temporary name. */ |
3221 | if (*output->name != '\0') { | |
3222 | strncpy(tmp_output.name, output->name, | |
3223 | sizeof(tmp_output.name)); | |
3224 | } | |
3225 | ||
1bfe7328 DG |
3226 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3227 | ||
e1986656 | 3228 | ret = record_kernel_snapshot(ksess, &tmp_output, |
68808f4e | 3229 | session, wait, max_stream_size); |
a934f4af | 3230 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3231 | rcu_read_unlock(); |
3232 | goto error; | |
3233 | } | |
1bfe7328 | 3234 | snapshot_success = 1; |
6dc3064a DG |
3235 | } |
3236 | rcu_read_unlock(); | |
3237 | } | |
3238 | } | |
3239 | ||
3240 | if (session->ust_session) { | |
3241 | struct ltt_ust_session *usess = session->ust_session; | |
3242 | ||
e1986656 DG |
3243 | if (use_tmp_output) { |
3244 | ret = record_ust_snapshot(usess, &tmp_output, session, | |
68808f4e | 3245 | wait, max_stream_size); |
a934f4af | 3246 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3247 | goto error; |
3248 | } | |
1bfe7328 | 3249 | snapshot_success = 1; |
6dc3064a DG |
3250 | } else { |
3251 | struct snapshot_output *sout; | |
3252 | struct lttng_ht_iter iter; | |
3253 | ||
3254 | rcu_read_lock(); | |
3255 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3256 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3257 | /* |
3258 | * Make a local copy of the output and assign the possible | |
3259 | * temporary value given by the caller. | |
3260 | */ | |
3261 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3262 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3263 | ||
e1986656 DG |
3264 | /* Use temporary max size. */ |
3265 | if (output->max_size != (uint64_t) -1ULL) { | |
3266 | tmp_output.max_size = output->max_size; | |
3267 | } | |
3268 | ||
68808f4e DG |
3269 | if (tmp_output.max_size != 0 && |
3270 | tmp_output.max_size < session_max_size) { | |
3271 | rcu_read_unlock(); | |
3272 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3273 | goto error; | |
3274 | } | |
3275 | ||
e1986656 DG |
3276 | /* Use temporary name. */ |
3277 | if (*output->name != '\0') { | |
3278 | strncpy(tmp_output.name, output->name, | |
3279 | sizeof(tmp_output.name)); | |
3280 | } | |
3281 | ||
1bfe7328 DG |
3282 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3283 | ||
e1986656 | 3284 | ret = record_ust_snapshot(usess, &tmp_output, session, |
68808f4e | 3285 | wait, max_stream_size); |
a934f4af | 3286 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3287 | rcu_read_unlock(); |
3288 | goto error; | |
3289 | } | |
1bfe7328 | 3290 | snapshot_success = 1; |
6dc3064a DG |
3291 | } |
3292 | rcu_read_unlock(); | |
3293 | } | |
3294 | } | |
3295 | ||
1bfe7328 DG |
3296 | if (snapshot_success) { |
3297 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3298 | } else { |
3299 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3300 | } |
3301 | ||
6dc3064a | 3302 | error: |
6dc3064a DG |
3303 | return ret; |
3304 | } | |
3305 | ||
2f77fc4b DG |
3306 | /* |
3307 | * Init command subsystem. | |
3308 | */ | |
3309 | void cmd_init(void) | |
3310 | { | |
3311 | /* | |
d88aee68 DG |
3312 | * Set network sequence index to 1 for streams to match a relayd |
3313 | * socket on the consumer side. | |
2f77fc4b | 3314 | */ |
d88aee68 DG |
3315 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3316 | relayd_net_seq_idx = 1; | |
3317 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3318 | |
3319 | DBG("Command subsystem initialized"); | |
3320 | } |