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> | |
a407f996 | 20 | #include <string.h> |
6dc3064a | 21 | #include <inttypes.h> |
2f77fc4b DG |
22 | #include <urcu/list.h> |
23 | #include <urcu/uatomic.h> | |
24 | ||
25 | #include <common/defaults.h> | |
26 | #include <common/common.h> | |
27 | #include <common/sessiond-comm/sessiond-comm.h> | |
28 | #include <common/relayd/relayd.h> | |
10a50311 | 29 | #include <common/utils.h> |
2f77fc4b DG |
30 | |
31 | #include "channel.h" | |
32 | #include "consumer.h" | |
33 | #include "event.h" | |
8782cc74 | 34 | #include "health-sessiond.h" |
2f77fc4b DG |
35 | #include "kernel.h" |
36 | #include "kernel-consumer.h" | |
37 | #include "lttng-sessiond.h" | |
38 | #include "utils.h" | |
834978fd | 39 | #include "syscall.h" |
2f77fc4b DG |
40 | |
41 | #include "cmd.h" | |
42 | ||
43 | /* | |
44 | * Used to keep a unique index for each relayd socket created where this value | |
45 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
46 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
47 | * held. | |
2f77fc4b | 48 | */ |
d88aee68 DG |
49 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
50 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 51 | |
18a720cd MD |
52 | /* |
53 | * Both functions below are special case for the Kernel domain when | |
54 | * enabling/disabling all events. | |
55 | */ | |
56 | static | |
57 | int enable_kevent_all(struct ltt_session *session, | |
58 | struct lttng_domain *domain, char *channel_name, | |
59 | struct lttng_event *event, | |
60 | char *filter_expression, | |
61 | struct lttng_filter_bytecode *filter, int wpipe); | |
62 | static | |
63 | int disable_kevent_all(struct ltt_session *session, int domain, | |
64 | char *channel_name, | |
65 | struct lttng_event *event); | |
66 | ||
2f77fc4b DG |
67 | /* |
68 | * Create a session path used by list_lttng_sessions for the case that the | |
69 | * session consumer is on the network. | |
70 | */ | |
71 | static int build_network_session_path(char *dst, size_t size, | |
72 | struct ltt_session *session) | |
73 | { | |
74 | int ret, kdata_port, udata_port; | |
75 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
76 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
77 | ||
78 | assert(session); | |
79 | assert(dst); | |
80 | ||
81 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
82 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
83 | ||
84 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
85 | ||
86 | if (session->kernel_session && session->kernel_session->consumer) { | |
87 | kuri = &session->kernel_session->consumer->dst.net.control; | |
88 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
89 | } | |
90 | ||
91 | if (session->ust_session && session->ust_session->consumer) { | |
92 | uuri = &session->ust_session->consumer->dst.net.control; | |
93 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
94 | } | |
95 | ||
96 | if (uuri == NULL && kuri == NULL) { | |
97 | uri = &session->consumer->dst.net.control; | |
98 | kdata_port = session->consumer->dst.net.data.port; | |
99 | } else if (kuri && uuri) { | |
100 | ret = uri_compare(kuri, uuri); | |
101 | if (ret) { | |
102 | /* Not Equal */ | |
103 | uri = kuri; | |
104 | /* Build uuri URL string */ | |
105 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
106 | if (ret < 0) { | |
107 | goto error; | |
108 | } | |
109 | } else { | |
110 | uri = kuri; | |
111 | } | |
112 | } else if (kuri && uuri == NULL) { | |
113 | uri = kuri; | |
114 | } else if (uuri && kuri == NULL) { | |
115 | uri = uuri; | |
116 | } | |
117 | ||
118 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
119 | if (ret < 0) { | |
120 | goto error; | |
121 | } | |
122 | ||
9aa9f900 DG |
123 | /* |
124 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
125 | * to print. | |
126 | */ | |
9d035200 | 127 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
128 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
129 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
130 | } else { | |
9aa9f900 | 131 | int dport; |
bef08707 | 132 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
133 | dport = kdata_port; |
134 | } else { | |
135 | /* No kernel URI, use the UST port. */ | |
136 | dport = udata_port; | |
137 | } | |
138 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
139 | } |
140 | ||
141 | error: | |
142 | return ret; | |
143 | } | |
144 | ||
145 | /* | |
146 | * Fill lttng_channel array of all channels. | |
147 | */ | |
148 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
149 | struct lttng_channel *channels) | |
150 | { | |
151 | int i = 0; | |
152 | struct ltt_kernel_channel *kchan; | |
153 | ||
154 | DBG("Listing channels for session %s", session->name); | |
155 | ||
156 | switch (domain) { | |
157 | case LTTNG_DOMAIN_KERNEL: | |
158 | /* Kernel channels */ | |
159 | if (session->kernel_session != NULL) { | |
160 | cds_list_for_each_entry(kchan, | |
161 | &session->kernel_session->channel_list.head, list) { | |
162 | /* Copy lttng_channel struct to array */ | |
163 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
164 | channels[i].enabled = kchan->enabled; | |
165 | i++; | |
166 | } | |
167 | } | |
168 | break; | |
169 | case LTTNG_DOMAIN_UST: | |
170 | { | |
171 | struct lttng_ht_iter iter; | |
172 | struct ltt_ust_channel *uchan; | |
173 | ||
e7fe706f | 174 | rcu_read_lock(); |
2f77fc4b DG |
175 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
176 | &iter.iter, uchan, node.node) { | |
177 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
178 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
179 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
180 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
181 | channels[i].attr.switch_timer_interval = | |
182 | uchan->attr.switch_timer_interval; | |
183 | channels[i].attr.read_timer_interval = | |
184 | uchan->attr.read_timer_interval; | |
185 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
186 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
187 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
2f77fc4b DG |
188 | switch (uchan->attr.output) { |
189 | case LTTNG_UST_MMAP: | |
190 | default: | |
191 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
192 | break; | |
193 | } | |
194 | i++; | |
195 | } | |
e7fe706f | 196 | rcu_read_unlock(); |
2f77fc4b DG |
197 | break; |
198 | } | |
199 | default: | |
200 | break; | |
201 | } | |
202 | } | |
203 | ||
3c6a091f | 204 | /* |
022d91ba | 205 | * Create a list of agent domain events. |
3c6a091f DG |
206 | * |
207 | * Return number of events in list on success or else a negative value. | |
208 | */ | |
022d91ba | 209 | static int list_lttng_agent_events(struct agent *agt, |
3c6a091f DG |
210 | struct lttng_event **events) |
211 | { | |
212 | int i = 0, ret = 0; | |
213 | unsigned int nb_event = 0; | |
022d91ba | 214 | struct agent_event *event; |
3c6a091f DG |
215 | struct lttng_event *tmp_events; |
216 | struct lttng_ht_iter iter; | |
217 | ||
022d91ba | 218 | assert(agt); |
3c6a091f DG |
219 | assert(events); |
220 | ||
022d91ba | 221 | DBG3("Listing agent events"); |
3c6a091f | 222 | |
d515217c | 223 | rcu_read_lock(); |
022d91ba | 224 | nb_event = lttng_ht_get_count(agt->events); |
d515217c | 225 | rcu_read_unlock(); |
3c6a091f DG |
226 | if (nb_event == 0) { |
227 | ret = nb_event; | |
228 | goto error; | |
229 | } | |
230 | ||
231 | tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); | |
232 | if (!tmp_events) { | |
022d91ba | 233 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
234 | ret = -LTTNG_ERR_FATAL; |
235 | goto error; | |
236 | } | |
237 | ||
238 | rcu_read_lock(); | |
022d91ba | 239 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
240 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
241 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
242 | tmp_events[i].enabled = event->enabled; | |
ff94328f DG |
243 | tmp_events[i].loglevel = event->loglevel; |
244 | tmp_events[i].loglevel_type = event->loglevel_type; | |
3c6a091f DG |
245 | i++; |
246 | } | |
247 | rcu_read_unlock(); | |
248 | ||
249 | *events = tmp_events; | |
250 | ret = nb_event; | |
251 | ||
252 | error: | |
253 | assert(nb_event == i); | |
254 | return ret; | |
255 | } | |
256 | ||
2f77fc4b DG |
257 | /* |
258 | * Create a list of ust global domain events. | |
259 | */ | |
260 | static int list_lttng_ust_global_events(char *channel_name, | |
261 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
262 | { | |
263 | int i = 0, ret = 0; | |
264 | unsigned int nb_event = 0; | |
265 | struct lttng_ht_iter iter; | |
266 | struct lttng_ht_node_str *node; | |
267 | struct ltt_ust_channel *uchan; | |
268 | struct ltt_ust_event *uevent; | |
269 | struct lttng_event *tmp; | |
270 | ||
271 | DBG("Listing UST global events for channel %s", channel_name); | |
272 | ||
273 | rcu_read_lock(); | |
274 | ||
275 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
276 | node = lttng_ht_iter_get_node_str(&iter); | |
277 | if (node == NULL) { | |
f73fabfd | 278 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
279 | goto error; |
280 | } | |
281 | ||
282 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
283 | ||
284 | nb_event += lttng_ht_get_count(uchan->events); | |
285 | ||
286 | if (nb_event == 0) { | |
287 | ret = nb_event; | |
288 | goto error; | |
289 | } | |
290 | ||
291 | DBG3("Listing UST global %d events", nb_event); | |
292 | ||
293 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
294 | if (tmp == NULL) { | |
f73fabfd | 295 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
296 | goto error; |
297 | } | |
298 | ||
299 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
300 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
301 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
302 | tmp[i].enabled = uevent->enabled; | |
303 | ||
304 | switch (uevent->attr.instrumentation) { | |
305 | case LTTNG_UST_TRACEPOINT: | |
306 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
307 | break; | |
308 | case LTTNG_UST_PROBE: | |
309 | tmp[i].type = LTTNG_EVENT_PROBE; | |
310 | break; | |
311 | case LTTNG_UST_FUNCTION: | |
312 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
313 | break; | |
314 | } | |
315 | ||
316 | tmp[i].loglevel = uevent->attr.loglevel; | |
317 | switch (uevent->attr.loglevel_type) { | |
318 | case LTTNG_UST_LOGLEVEL_ALL: | |
319 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
320 | break; | |
321 | case LTTNG_UST_LOGLEVEL_RANGE: | |
322 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
323 | break; | |
324 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
325 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
326 | break; | |
327 | } | |
328 | if (uevent->filter) { | |
329 | tmp[i].filter = 1; | |
330 | } | |
4634f12e JI |
331 | if (uevent->exclusion) { |
332 | tmp[i].exclusion = 1; | |
333 | } | |
2f77fc4b DG |
334 | i++; |
335 | } | |
336 | ||
337 | ret = nb_event; | |
338 | *events = tmp; | |
339 | ||
340 | error: | |
341 | rcu_read_unlock(); | |
342 | return ret; | |
343 | } | |
344 | ||
345 | /* | |
346 | * Fill lttng_event array of all kernel events in the channel. | |
347 | */ | |
348 | static int list_lttng_kernel_events(char *channel_name, | |
349 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
350 | { | |
351 | int i = 0, ret; | |
352 | unsigned int nb_event; | |
353 | struct ltt_kernel_event *event; | |
354 | struct ltt_kernel_channel *kchan; | |
355 | ||
356 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
357 | if (kchan == NULL) { | |
f73fabfd | 358 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
359 | goto error; |
360 | } | |
361 | ||
362 | nb_event = kchan->event_count; | |
363 | ||
364 | DBG("Listing events for channel %s", kchan->channel->name); | |
365 | ||
366 | if (nb_event == 0) { | |
834978fd DG |
367 | *events = NULL; |
368 | goto syscall; | |
2f77fc4b DG |
369 | } |
370 | ||
371 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
372 | if (*events == NULL) { | |
f73fabfd | 373 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
374 | goto error; |
375 | } | |
376 | ||
377 | /* Kernel channels */ | |
378 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
379 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
380 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
381 | (*events)[i].enabled = event->enabled; | |
382 | ||
383 | switch (event->event->instrumentation) { | |
384 | case LTTNG_KERNEL_TRACEPOINT: | |
385 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
386 | break; | |
2f77fc4b | 387 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
388 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
389 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
390 | sizeof(struct lttng_kernel_kprobe)); | |
391 | break; | |
392 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
393 | (*events)[i].type = LTTNG_EVENT_PROBE; |
394 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
395 | sizeof(struct lttng_kernel_kprobe)); | |
396 | break; | |
397 | case LTTNG_KERNEL_FUNCTION: | |
398 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
399 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
400 | sizeof(struct lttng_kernel_function)); | |
401 | break; | |
402 | case LTTNG_KERNEL_NOOP: | |
403 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
404 | break; | |
405 | case LTTNG_KERNEL_SYSCALL: | |
406 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
407 | break; | |
408 | case LTTNG_KERNEL_ALL: | |
409 | assert(0); | |
410 | break; | |
411 | } | |
412 | i++; | |
413 | } | |
414 | ||
834978fd DG |
415 | syscall: |
416 | if (syscall_table) { | |
417 | ssize_t new_size; | |
418 | ||
419 | new_size = syscall_list_channel(kchan, events, nb_event); | |
420 | if (new_size < 0) { | |
421 | free(events); | |
422 | ret = -new_size; | |
423 | goto error; | |
424 | } | |
425 | nb_event = new_size; | |
426 | } | |
427 | ||
2f77fc4b DG |
428 | return nb_event; |
429 | ||
430 | error: | |
f73fabfd DG |
431 | /* Negate the error code to differentiate the size from an error */ |
432 | return -ret; | |
2f77fc4b DG |
433 | } |
434 | ||
435 | /* | |
436 | * Add URI so the consumer output object. Set the correct path depending on the | |
437 | * domain adding the default trace directory. | |
438 | */ | |
439 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
440 | struct lttng_uri *uri, int domain, const char *session_name) | |
441 | { | |
f73fabfd | 442 | int ret = LTTNG_OK; |
2f77fc4b DG |
443 | const char *default_trace_dir; |
444 | ||
445 | assert(uri); | |
446 | ||
447 | if (consumer == NULL) { | |
448 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 449 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
450 | goto error; |
451 | } | |
452 | ||
453 | switch (domain) { | |
454 | case LTTNG_DOMAIN_KERNEL: | |
455 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
456 | break; | |
457 | case LTTNG_DOMAIN_UST: | |
458 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
459 | break; | |
460 | default: | |
461 | /* | |
462 | * This case is possible is we try to add the URI to the global tracing | |
463 | * session consumer object which in this case there is no subdir. | |
464 | */ | |
465 | default_trace_dir = ""; | |
466 | } | |
467 | ||
468 | switch (uri->dtype) { | |
469 | case LTTNG_DST_IPV4: | |
470 | case LTTNG_DST_IPV6: | |
471 | DBG2("Setting network URI to consumer"); | |
472 | ||
df75acac DG |
473 | if (consumer->type == CONSUMER_DST_NET) { |
474 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
475 | consumer->dst.net.control_isset) || |
476 | (uri->stype == LTTNG_STREAM_DATA && | |
477 | consumer->dst.net.data_isset)) { | |
df75acac DG |
478 | ret = LTTNG_ERR_URL_EXIST; |
479 | goto error; | |
480 | } | |
481 | } else { | |
482 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
483 | } |
484 | ||
df75acac DG |
485 | consumer->type = CONSUMER_DST_NET; |
486 | ||
2f77fc4b DG |
487 | /* Set URI into consumer output object */ |
488 | ret = consumer_set_network_uri(consumer, uri); | |
489 | if (ret < 0) { | |
a74934ba | 490 | ret = -ret; |
2f77fc4b DG |
491 | goto error; |
492 | } else if (ret == 1) { | |
493 | /* | |
494 | * URI was the same in the consumer so we do not append the subdir | |
495 | * again so to not duplicate output dir. | |
496 | */ | |
f86c9f4e | 497 | ret = LTTNG_OK; |
2f77fc4b DG |
498 | goto error; |
499 | } | |
500 | ||
501 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
502 | ret = consumer_set_subdir(consumer, session_name); | |
503 | if (ret < 0) { | |
f73fabfd | 504 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
505 | goto error; |
506 | } | |
507 | } | |
508 | ||
509 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
510 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
511 | strncat(consumer->subdir, default_trace_dir, |
512 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
513 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
514 | } | |
515 | ||
516 | break; | |
517 | case LTTNG_DST_PATH: | |
518 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
519 | memset(consumer->dst.trace_path, 0, | |
520 | sizeof(consumer->dst.trace_path)); | |
521 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
522 | sizeof(consumer->dst.trace_path)); | |
523 | /* Append default trace dir */ | |
524 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
525 | sizeof(consumer->dst.trace_path) - |
526 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
527 | /* Flag consumer as local. */ |
528 | consumer->type = CONSUMER_DST_LOCAL; | |
529 | break; | |
530 | } | |
531 | ||
a74934ba DG |
532 | ret = LTTNG_OK; |
533 | ||
2f77fc4b DG |
534 | error: |
535 | return ret; | |
536 | } | |
537 | ||
538 | /* | |
539 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
540 | */ | |
541 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
542 | { | |
543 | int ret = 0; | |
544 | struct lttng_ht_iter iter; | |
545 | struct consumer_socket *socket; | |
546 | ||
547 | assert(session); | |
548 | ||
e7fe706f DG |
549 | rcu_read_lock(); |
550 | ||
2f77fc4b DG |
551 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
552 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
553 | socket, node.node) { | |
2f77fc4b | 554 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 555 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
556 | pthread_mutex_unlock(socket->lock); |
557 | if (ret < 0) { | |
f73fabfd | 558 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
559 | goto error; |
560 | } | |
561 | } | |
562 | } | |
563 | ||
564 | error: | |
e7fe706f | 565 | rcu_read_unlock(); |
2f77fc4b DG |
566 | return ret; |
567 | } | |
568 | ||
569 | /* | |
570 | * Create a socket to the relayd using the URI. | |
571 | * | |
572 | * On success, the relayd_sock pointer is set to the created socket. | |
573 | * Else, it's stays untouched and a lttcomm error code is returned. | |
574 | */ | |
6151a90f JD |
575 | static int create_connect_relayd(struct lttng_uri *uri, |
576 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
577 | { |
578 | int ret; | |
6151a90f | 579 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 580 | |
6151a90f JD |
581 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
582 | RELAYD_VERSION_COMM_MINOR); | |
583 | if (!rsock) { | |
f73fabfd | 584 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
585 | goto error; |
586 | } | |
587 | ||
ffe60014 DG |
588 | /* |
589 | * Connect to relayd so we can proceed with a session creation. This call | |
590 | * can possibly block for an arbitrary amount of time to set the health | |
591 | * state to be in poll execution. | |
592 | */ | |
593 | health_poll_entry(); | |
6151a90f | 594 | ret = relayd_connect(rsock); |
ffe60014 | 595 | health_poll_exit(); |
2f77fc4b DG |
596 | if (ret < 0) { |
597 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 598 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
599 | goto free_sock; |
600 | } | |
601 | ||
602 | /* Create socket for control stream. */ | |
603 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
604 | DBG3("Creating relayd stream socket from URI"); | |
605 | ||
606 | /* Check relayd version */ | |
6151a90f | 607 | ret = relayd_version_check(rsock); |
2f77fc4b | 608 | if (ret < 0) { |
f73fabfd | 609 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
610 | goto close_sock; |
611 | } | |
612 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
613 | DBG3("Creating relayd data socket from URI"); | |
614 | } else { | |
615 | /* Command is not valid */ | |
616 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 617 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
618 | goto close_sock; |
619 | } | |
620 | ||
6151a90f | 621 | *relayd_sock = rsock; |
2f77fc4b | 622 | |
f73fabfd | 623 | return LTTNG_OK; |
2f77fc4b DG |
624 | |
625 | close_sock: | |
6151a90f JD |
626 | /* The returned value is not useful since we are on an error path. */ |
627 | (void) relayd_close(rsock); | |
2f77fc4b | 628 | free_sock: |
6151a90f | 629 | free(rsock); |
2f77fc4b DG |
630 | error: |
631 | return ret; | |
632 | } | |
633 | ||
634 | /* | |
635 | * Connect to the relayd using URI and send the socket to the right consumer. | |
636 | */ | |
6dc3064a | 637 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 638 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
639 | struct consumer_socket *consumer_sock, |
640 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
641 | { |
642 | int ret; | |
6151a90f | 643 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 644 | |
ffe60014 | 645 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 646 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 647 | if (ret != LTTNG_OK) { |
6151a90f | 648 | goto error; |
ffe60014 | 649 | } |
6151a90f | 650 | assert(rsock); |
ffe60014 | 651 | |
2f77fc4b | 652 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
653 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
654 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
655 | /* |
656 | * Increment net_seq_idx because we are about to transfer the | |
657 | * new relayd socket to the consumer. | |
d88aee68 | 658 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 659 | */ |
d88aee68 DG |
660 | consumer->net_seq_index = ++relayd_net_seq_idx; |
661 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
662 | } |
663 | ||
2f77fc4b | 664 | /* Send relayd socket to consumer. */ |
6151a90f | 665 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
666 | relayd_uri->stype, session_id, |
667 | session_name, hostname, session_live_timer); | |
2f77fc4b | 668 | if (ret < 0) { |
f73fabfd | 669 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
670 | goto close_sock; |
671 | } | |
672 | ||
c890b720 DG |
673 | /* Flag that the corresponding socket was sent. */ |
674 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 675 | consumer_sock->control_sock_sent = 1; |
c890b720 | 676 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 677 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
678 | } |
679 | ||
f73fabfd | 680 | ret = LTTNG_OK; |
2f77fc4b DG |
681 | |
682 | /* | |
683 | * Close socket which was dup on the consumer side. The session daemon does | |
684 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
685 | */ | |
686 | ||
687 | close_sock: | |
6151a90f JD |
688 | (void) relayd_close(rsock); |
689 | free(rsock); | |
2f77fc4b | 690 | |
6151a90f | 691 | error: |
ffe60014 DG |
692 | if (ret != LTTNG_OK) { |
693 | /* | |
d9078d0c DG |
694 | * The consumer output for this session should not be used anymore |
695 | * since the relayd connection failed thus making any tracing or/and | |
696 | * streaming not usable. | |
ffe60014 | 697 | */ |
d9078d0c | 698 | consumer->enabled = 0; |
ffe60014 | 699 | } |
2f77fc4b DG |
700 | return ret; |
701 | } | |
702 | ||
703 | /* | |
704 | * Send both relayd sockets to a specific consumer and domain. This is a | |
705 | * helper function to facilitate sending the information to the consumer for a | |
706 | * session. | |
707 | */ | |
6dc3064a | 708 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
709 | struct consumer_output *consumer, struct consumer_socket *sock, |
710 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 711 | { |
dda67f6c | 712 | int ret = LTTNG_OK; |
2f77fc4b | 713 | |
2f77fc4b | 714 | assert(consumer); |
6dc3064a | 715 | assert(sock); |
2f77fc4b | 716 | |
2f77fc4b | 717 | /* Sending control relayd socket. */ |
ffe60014 | 718 | if (!sock->control_sock_sent) { |
6dc3064a | 719 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
720 | &consumer->dst.net.control, consumer, sock, |
721 | session_name, hostname, session_live_timer); | |
c890b720 DG |
722 | if (ret != LTTNG_OK) { |
723 | goto error; | |
724 | } | |
2f77fc4b DG |
725 | } |
726 | ||
727 | /* Sending data relayd socket. */ | |
ffe60014 | 728 | if (!sock->data_sock_sent) { |
6dc3064a | 729 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
730 | &consumer->dst.net.data, consumer, sock, |
731 | session_name, hostname, session_live_timer); | |
c890b720 DG |
732 | if (ret != LTTNG_OK) { |
733 | goto error; | |
734 | } | |
2f77fc4b DG |
735 | } |
736 | ||
2f77fc4b DG |
737 | error: |
738 | return ret; | |
739 | } | |
740 | ||
741 | /* | |
742 | * Setup relayd connections for a tracing session. First creates the socket to | |
743 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
744 | * network. | |
745 | */ | |
ffe60014 | 746 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 747 | { |
f73fabfd | 748 | int ret = LTTNG_OK; |
2f77fc4b DG |
749 | struct ltt_ust_session *usess; |
750 | struct ltt_kernel_session *ksess; | |
751 | struct consumer_socket *socket; | |
752 | struct lttng_ht_iter iter; | |
753 | ||
754 | assert(session); | |
755 | ||
756 | usess = session->ust_session; | |
757 | ksess = session->kernel_session; | |
758 | ||
785d2d0d | 759 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 760 | |
e7fe706f DG |
761 | rcu_read_lock(); |
762 | ||
2f77fc4b DG |
763 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
764 | && usess->consumer->enabled) { | |
765 | /* For each consumer socket, send relayd sockets */ | |
766 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
767 | socket, node.node) { | |
2f77fc4b | 768 | pthread_mutex_lock(socket->lock); |
6dc3064a | 769 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
770 | usess->consumer, socket, |
771 | session->name, session->hostname, | |
772 | session->live_timer); | |
2f77fc4b | 773 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 774 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
775 | goto error; |
776 | } | |
6dc3064a DG |
777 | /* Session is now ready for network streaming. */ |
778 | session->net_handle = 1; | |
2f77fc4b DG |
779 | } |
780 | } | |
781 | ||
782 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
783 | && ksess->consumer->enabled) { | |
784 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
785 | socket, node.node) { | |
2f77fc4b | 786 | pthread_mutex_lock(socket->lock); |
6dc3064a | 787 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
788 | ksess->consumer, socket, |
789 | session->name, session->hostname, | |
790 | session->live_timer); | |
2f77fc4b | 791 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 792 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
793 | goto error; |
794 | } | |
6dc3064a DG |
795 | /* Session is now ready for network streaming. */ |
796 | session->net_handle = 1; | |
2f77fc4b DG |
797 | } |
798 | } | |
799 | ||
800 | error: | |
e7fe706f | 801 | rcu_read_unlock(); |
2f77fc4b DG |
802 | return ret; |
803 | } | |
804 | ||
9b6c7ec5 DG |
805 | /* |
806 | * Start a kernel session by opening all necessary streams. | |
807 | */ | |
808 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
809 | { | |
810 | int ret; | |
811 | struct ltt_kernel_channel *kchan; | |
812 | ||
813 | /* Open kernel metadata */ | |
07b86b52 | 814 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
815 | ret = kernel_open_metadata(ksess); |
816 | if (ret < 0) { | |
817 | ret = LTTNG_ERR_KERN_META_FAIL; | |
818 | goto error; | |
819 | } | |
820 | } | |
821 | ||
822 | /* Open kernel metadata stream */ | |
07b86b52 | 823 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
824 | ret = kernel_open_metadata_stream(ksess); |
825 | if (ret < 0) { | |
826 | ERR("Kernel create metadata stream failed"); | |
827 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
828 | goto error; | |
829 | } | |
830 | } | |
831 | ||
832 | /* For each channel */ | |
833 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
834 | if (kchan->stream_count == 0) { | |
835 | ret = kernel_open_channel_stream(kchan); | |
836 | if (ret < 0) { | |
837 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
838 | goto error; | |
839 | } | |
840 | /* Update the stream global counter */ | |
841 | ksess->stream_count_global += ret; | |
842 | } | |
843 | } | |
844 | ||
845 | /* Setup kernel consumer socket and send fds to it */ | |
846 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 847 | if (ret != 0) { |
9b6c7ec5 DG |
848 | ret = LTTNG_ERR_KERN_START_FAIL; |
849 | goto error; | |
850 | } | |
851 | ||
852 | /* This start the kernel tracing */ | |
853 | ret = kernel_start_session(ksess); | |
854 | if (ret < 0) { | |
855 | ret = LTTNG_ERR_KERN_START_FAIL; | |
856 | goto error; | |
857 | } | |
858 | ||
859 | /* Quiescent wait after starting trace */ | |
784303b0 | 860 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 861 | |
14fb1ebe | 862 | ksess->active = 1; |
9b6c7ec5 DG |
863 | |
864 | ret = LTTNG_OK; | |
865 | ||
866 | error: | |
867 | return ret; | |
868 | } | |
869 | ||
2f77fc4b DG |
870 | /* |
871 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
872 | */ | |
873 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
874 | char *channel_name) | |
875 | { | |
876 | int ret; | |
877 | struct ltt_ust_session *usess; | |
878 | ||
879 | usess = session->ust_session; | |
880 | ||
2223c96f DG |
881 | rcu_read_lock(); |
882 | ||
2f77fc4b DG |
883 | switch (domain) { |
884 | case LTTNG_DOMAIN_KERNEL: | |
885 | { | |
886 | ret = channel_kernel_disable(session->kernel_session, | |
887 | channel_name); | |
f73fabfd | 888 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
889 | goto error; |
890 | } | |
891 | ||
892 | kernel_wait_quiescent(kernel_tracer_fd); | |
893 | break; | |
894 | } | |
895 | case LTTNG_DOMAIN_UST: | |
896 | { | |
897 | struct ltt_ust_channel *uchan; | |
898 | struct lttng_ht *chan_ht; | |
899 | ||
900 | chan_ht = usess->domain_global.channels; | |
901 | ||
902 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
903 | if (uchan == NULL) { | |
f73fabfd | 904 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
905 | goto error; |
906 | } | |
907 | ||
7972aab2 | 908 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 909 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
910 | goto error; |
911 | } | |
912 | break; | |
913 | } | |
914 | #if 0 | |
915 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
916 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
917 | case LTTNG_DOMAIN_UST_PID: | |
918 | #endif | |
919 | default: | |
f73fabfd | 920 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
921 | goto error; |
922 | } | |
923 | ||
f73fabfd | 924 | ret = LTTNG_OK; |
2f77fc4b DG |
925 | |
926 | error: | |
2223c96f | 927 | rcu_read_unlock(); |
2f77fc4b DG |
928 | return ret; |
929 | } | |
930 | ||
931 | /* | |
932 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
933 | * | |
934 | * The wpipe arguments is used as a notifier for the kernel thread. | |
935 | */ | |
936 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 937 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
938 | { |
939 | int ret; | |
940 | struct ltt_ust_session *usess = session->ust_session; | |
941 | struct lttng_ht *chan_ht; | |
a407f996 | 942 | size_t len; |
2f77fc4b DG |
943 | |
944 | assert(session); | |
945 | assert(attr); | |
7972aab2 | 946 | assert(domain); |
2f77fc4b | 947 | |
a407f996 PP |
948 | len = strnlen(attr->name, sizeof(attr->name)); |
949 | ||
950 | /* Validate channel name */ | |
951 | if (attr->name[0] == '.' || | |
952 | memchr(attr->name, '/', len) != NULL) { | |
953 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
954 | goto end; | |
955 | } | |
956 | ||
2f77fc4b DG |
957 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
958 | ||
03b4fdcf DG |
959 | rcu_read_lock(); |
960 | ||
ecc48a90 JD |
961 | /* |
962 | * Don't try to enable a channel if the session has been started at | |
963 | * some point in time before. The tracer does not allow it. | |
964 | */ | |
8382cf6f | 965 | if (session->has_been_started) { |
ecc48a90 JD |
966 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
967 | goto error; | |
968 | } | |
969 | ||
970 | /* | |
971 | * If the session is a live session, remove the switch timer, the | |
972 | * live timer does the same thing but sends also synchronisation | |
973 | * beacons for inactive streams. | |
974 | */ | |
975 | if (session->live_timer > 0) { | |
976 | attr->attr.live_timer_interval = session->live_timer; | |
977 | attr->attr.switch_timer_interval = 0; | |
978 | } | |
979 | ||
33fbd469 DG |
980 | /* |
981 | * The ringbuffer (both in user space and kernel) behave badly in overwrite | |
982 | * mode and with less than 2 subbuf so block it right away and send back an | |
983 | * invalid attribute error. | |
984 | */ | |
985 | if (attr->attr.overwrite && attr->attr.num_subbuf < 2) { | |
986 | ret = LTTNG_ERR_INVALID; | |
987 | goto error; | |
988 | } | |
989 | ||
7972aab2 | 990 | switch (domain->type) { |
2f77fc4b DG |
991 | case LTTNG_DOMAIN_KERNEL: |
992 | { | |
993 | struct ltt_kernel_channel *kchan; | |
994 | ||
2f77fc4b DG |
995 | kchan = trace_kernel_get_channel_by_name(attr->name, |
996 | session->kernel_session); | |
997 | if (kchan == NULL) { | |
998 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
999 | if (attr->name[0] != '\0') { |
1000 | session->kernel_session->has_non_default_channel = 1; | |
1001 | } | |
2f77fc4b DG |
1002 | } else { |
1003 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1004 | } | |
1005 | ||
f73fabfd | 1006 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1007 | goto error; |
1008 | } | |
1009 | ||
784303b0 | 1010 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
1011 | break; |
1012 | } | |
1013 | case LTTNG_DOMAIN_UST: | |
1014 | { | |
1015 | struct ltt_ust_channel *uchan; | |
1016 | ||
1017 | chan_ht = usess->domain_global.channels; | |
1018 | ||
1019 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
1020 | if (uchan == NULL) { | |
7972aab2 | 1021 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
1022 | if (attr->name[0] != '\0') { |
1023 | usess->has_non_default_channel = 1; | |
1024 | } | |
2f77fc4b | 1025 | } else { |
7972aab2 | 1026 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1027 | } |
1028 | break; | |
1029 | } | |
2f77fc4b | 1030 | default: |
f73fabfd | 1031 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1032 | goto error; |
1033 | } | |
1034 | ||
1035 | error: | |
2223c96f | 1036 | rcu_read_unlock(); |
a407f996 | 1037 | end: |
2f77fc4b DG |
1038 | return ret; |
1039 | } | |
1040 | ||
1041 | ||
1042 | /* | |
1043 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1044 | */ | |
1045 | int cmd_disable_event(struct ltt_session *session, int domain, | |
6e911cad MD |
1046 | char *channel_name, |
1047 | struct lttng_event *event) | |
2f77fc4b DG |
1048 | { |
1049 | int ret; | |
6e911cad MD |
1050 | char *event_name; |
1051 | ||
18a720cd MD |
1052 | DBG("Disable event command for event \'%s\'", event->name); |
1053 | ||
6e911cad MD |
1054 | event_name = event->name; |
1055 | ||
4b9ac515 JG |
1056 | /* Error out on unhandled search criteria */ |
1057 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad MD |
1058 | || event->pid || event->filter || event->exclusion) { |
1059 | return LTTNG_ERR_UNK; | |
1060 | } | |
18a720cd MD |
1061 | /* Special handling for kernel domain all events. */ |
1062 | if (domain == LTTNG_DOMAIN_KERNEL && !strcmp(event_name, "*")) { | |
1063 | return disable_kevent_all(session, domain, channel_name, event); | |
1064 | } | |
2f77fc4b | 1065 | |
2223c96f DG |
1066 | rcu_read_lock(); |
1067 | ||
2f77fc4b DG |
1068 | switch (domain) { |
1069 | case LTTNG_DOMAIN_KERNEL: | |
1070 | { | |
1071 | struct ltt_kernel_channel *kchan; | |
1072 | struct ltt_kernel_session *ksess; | |
1073 | ||
1074 | ksess = session->kernel_session; | |
1075 | ||
85076754 MD |
1076 | /* |
1077 | * If a non-default channel has been created in the | |
1078 | * session, explicitely require that -c chan_name needs | |
1079 | * to be provided. | |
1080 | */ | |
1081 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1082 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1083 | goto error; | |
1084 | } | |
1085 | ||
2f77fc4b DG |
1086 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1087 | if (kchan == NULL) { | |
f73fabfd | 1088 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1089 | goto error; |
1090 | } | |
1091 | ||
6e911cad MD |
1092 | switch (event->type) { |
1093 | case LTTNG_EVENT_ALL: | |
1094 | case LTTNG_EVENT_TRACEPOINT: | |
1095 | ret = event_kernel_disable_tracepoint(kchan, event_name); | |
1096 | if (ret != LTTNG_OK) { | |
1097 | goto error; | |
1098 | } | |
1099 | break; | |
1100 | case LTTNG_EVENT_SYSCALL: | |
1101 | ret = event_kernel_disable_syscall(kchan, event_name); | |
e2b957af MD |
1102 | if (ret != LTTNG_OK) { |
1103 | goto error; | |
1104 | } | |
6e911cad MD |
1105 | break; |
1106 | default: | |
1107 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1108 | goto error; |
1109 | } | |
1110 | ||
1111 | kernel_wait_quiescent(kernel_tracer_fd); | |
1112 | break; | |
1113 | } | |
1114 | case LTTNG_DOMAIN_UST: | |
1115 | { | |
1116 | struct ltt_ust_channel *uchan; | |
1117 | struct ltt_ust_session *usess; | |
1118 | ||
1119 | usess = session->ust_session; | |
1120 | ||
85076754 MD |
1121 | /* |
1122 | * If a non-default channel has been created in the | |
1123 | * session, explicitely require that -c chan_name needs | |
1124 | * to be provided. | |
1125 | */ | |
1126 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1127 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1128 | goto error; | |
1129 | } | |
1130 | ||
2f77fc4b DG |
1131 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1132 | channel_name); | |
1133 | if (uchan == NULL) { | |
f73fabfd | 1134 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1135 | goto error; |
1136 | } | |
1137 | ||
6e911cad MD |
1138 | switch (event->type) { |
1139 | case LTTNG_EVENT_ALL: | |
1140 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); | |
1141 | if (ret != LTTNG_OK) { | |
1142 | goto error; | |
1143 | } | |
1144 | break; | |
1145 | default: | |
1146 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1147 | goto error; |
1148 | } | |
1149 | ||
1150 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1151 | channel_name); | |
1152 | break; | |
1153 | } | |
5cdb6027 | 1154 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1155 | case LTTNG_DOMAIN_JUL: |
1156 | { | |
fefd409b | 1157 | struct agent *agt; |
f20baf8e DG |
1158 | struct ltt_ust_session *usess = session->ust_session; |
1159 | ||
1160 | assert(usess); | |
1161 | ||
6e911cad MD |
1162 | switch (event->type) { |
1163 | case LTTNG_EVENT_ALL: | |
1164 | break; | |
1165 | default: | |
1166 | ret = LTTNG_ERR_UNK; | |
1167 | goto error; | |
1168 | } | |
1169 | ||
5cdb6027 | 1170 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1171 | if (!agt) { |
1172 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
1173 | goto error; | |
1174 | } | |
18a720cd MD |
1175 | /* The wild card * means that everything should be disabled. */ |
1176 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
1177 | ret = event_agent_disable_all(usess, agt); | |
1178 | } else { | |
1179 | ret = event_agent_disable(usess, agt, event_name); | |
1180 | } | |
f20baf8e DG |
1181 | if (ret != LTTNG_OK) { |
1182 | goto error; | |
1183 | } | |
1184 | ||
1185 | break; | |
1186 | } | |
2f77fc4b DG |
1187 | #if 0 |
1188 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1189 | case LTTNG_DOMAIN_UST_PID: | |
1190 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1191 | #endif | |
1192 | default: | |
f73fabfd | 1193 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1194 | goto error; |
1195 | } | |
1196 | ||
f73fabfd | 1197 | ret = LTTNG_OK; |
2f77fc4b DG |
1198 | |
1199 | error: | |
2223c96f | 1200 | rcu_read_unlock(); |
2f77fc4b DG |
1201 | return ret; |
1202 | } | |
1203 | ||
1204 | /* | |
18a720cd | 1205 | * Command LTTNG_DISABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1206 | */ |
18a720cd MD |
1207 | static |
1208 | int disable_kevent_all(struct ltt_session *session, int domain, | |
6e911cad MD |
1209 | char *channel_name, |
1210 | struct lttng_event *event) | |
2f77fc4b DG |
1211 | { |
1212 | int ret; | |
1213 | ||
2223c96f DG |
1214 | rcu_read_lock(); |
1215 | ||
2f77fc4b DG |
1216 | switch (domain) { |
1217 | case LTTNG_DOMAIN_KERNEL: | |
1218 | { | |
1219 | struct ltt_kernel_session *ksess; | |
1220 | struct ltt_kernel_channel *kchan; | |
1221 | ||
1222 | ksess = session->kernel_session; | |
1223 | ||
85076754 MD |
1224 | /* |
1225 | * If a non-default channel has been created in the | |
1226 | * session, explicitely require that -c chan_name needs | |
1227 | * to be provided. | |
1228 | */ | |
1229 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1230 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1231 | goto error; | |
1232 | } | |
1233 | ||
2f77fc4b DG |
1234 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1235 | if (kchan == NULL) { | |
f73fabfd | 1236 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1237 | goto error; |
1238 | } | |
1239 | ||
6e911cad MD |
1240 | switch (event->type) { |
1241 | case LTTNG_EVENT_ALL: | |
1242 | ret = event_kernel_disable_all(kchan); | |
1243 | if (ret != LTTNG_OK) { | |
1244 | goto error; | |
1245 | } | |
1246 | break; | |
1247 | case LTTNG_EVENT_SYSCALL: | |
e2b957af MD |
1248 | ret = event_kernel_disable_syscall(kchan, ""); |
1249 | if (ret != LTTNG_OK) { | |
1250 | goto error; | |
1251 | } | |
6e911cad MD |
1252 | break; |
1253 | default: | |
1254 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1255 | goto error; |
1256 | } | |
1257 | ||
1258 | kernel_wait_quiescent(kernel_tracer_fd); | |
1259 | break; | |
1260 | } | |
2f77fc4b | 1261 | default: |
f73fabfd | 1262 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1263 | goto error; |
1264 | } | |
1265 | ||
f73fabfd | 1266 | ret = LTTNG_OK; |
2f77fc4b DG |
1267 | |
1268 | error: | |
2223c96f | 1269 | rcu_read_unlock(); |
2f77fc4b DG |
1270 | return ret; |
1271 | } | |
1272 | ||
1273 | /* | |
1274 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1275 | */ | |
1276 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1277 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1278 | { |
d5979e4a | 1279 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1280 | |
1281 | switch (domain) { | |
1282 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1283 | assert(session->kernel_session); |
1284 | ||
1285 | if (session->kernel_session->channel_count == 0) { | |
1286 | /* Create default channel */ | |
1287 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1288 | if (ret != LTTNG_OK) { | |
1289 | goto error; | |
1290 | } | |
d5979e4a | 1291 | chan_kern_created = 1; |
979e618e | 1292 | } |
2f77fc4b | 1293 | /* Add kernel context to kernel tracer */ |
601d5acf | 1294 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1295 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1296 | goto error; |
1297 | } | |
1298 | break; | |
1299 | case LTTNG_DOMAIN_UST: | |
1300 | { | |
1301 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1302 | unsigned int chan_count; |
1303 | ||
2f77fc4b DG |
1304 | assert(usess); |
1305 | ||
85076754 | 1306 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1307 | if (chan_count == 0) { |
1308 | struct lttng_channel *attr; | |
1309 | /* Create default channel */ | |
0a9c6494 | 1310 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1311 | if (attr == NULL) { |
1312 | ret = LTTNG_ERR_FATAL; | |
1313 | goto error; | |
1314 | } | |
1315 | ||
7972aab2 | 1316 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1317 | if (ret != LTTNG_OK) { |
1318 | free(attr); | |
1319 | goto error; | |
1320 | } | |
1321 | free(attr); | |
d5979e4a | 1322 | chan_ust_created = 1; |
979e618e DG |
1323 | } |
1324 | ||
601d5acf | 1325 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1326 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1327 | goto error; |
1328 | } | |
1329 | break; | |
1330 | } | |
1331 | #if 0 | |
1332 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1333 | case LTTNG_DOMAIN_UST_PID: | |
1334 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1335 | #endif | |
1336 | default: | |
f73fabfd | 1337 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1338 | goto error; |
1339 | } | |
1340 | ||
d5979e4a | 1341 | return LTTNG_OK; |
2f77fc4b DG |
1342 | |
1343 | error: | |
d5979e4a DG |
1344 | if (chan_kern_created) { |
1345 | struct ltt_kernel_channel *kchan = | |
1346 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1347 | session->kernel_session); | |
1348 | /* Created previously, this should NOT fail. */ | |
1349 | assert(kchan); | |
1350 | kernel_destroy_channel(kchan); | |
1351 | } | |
1352 | ||
1353 | if (chan_ust_created) { | |
1354 | struct ltt_ust_channel *uchan = | |
1355 | trace_ust_find_channel_by_name( | |
1356 | session->ust_session->domain_global.channels, | |
1357 | DEFAULT_CHANNEL_NAME); | |
1358 | /* Created previously, this should NOT fail. */ | |
1359 | assert(uchan); | |
1360 | /* Remove from the channel list of the session. */ | |
1361 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1362 | uchan); | |
1363 | trace_ust_destroy_channel(uchan); | |
1364 | } | |
2f77fc4b DG |
1365 | return ret; |
1366 | } | |
1367 | ||
930a2e99 JG |
1368 | static int validate_event_name(const char *name) |
1369 | { | |
1370 | int ret = 0; | |
1371 | const char *c = name; | |
1372 | const char *event_name_end = c + LTTNG_SYMBOL_NAME_LEN; | |
1373 | ||
1374 | /* | |
1375 | * Make sure that unescaped wildcards are only used as the last | |
1376 | * character of the event name. | |
1377 | */ | |
1378 | while (c < event_name_end) { | |
1379 | switch (*c) { | |
1380 | case '\0': | |
1381 | goto end; | |
1382 | case '\\': | |
1383 | c++; | |
1384 | break; | |
1385 | case '*': | |
1386 | if ((c + 1) < event_name_end && *(c + 1)) { | |
1387 | /* Wildcard is not the last character */ | |
1388 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1389 | goto end; | |
1390 | } | |
1391 | default: | |
1392 | break; | |
1393 | } | |
1394 | c++; | |
1395 | } | |
1396 | end: | |
1397 | return ret; | |
1398 | } | |
1399 | ||
2f77fc4b DG |
1400 | /* |
1401 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
faa9eb17 | 1402 | * We own filter, exclusion, and filter_expression. |
2f77fc4b | 1403 | */ |
7972aab2 | 1404 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 | 1405 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1406 | char *filter_expression, |
db8f1377 JI |
1407 | struct lttng_filter_bytecode *filter, |
1408 | struct lttng_event_exclusion *exclusion, | |
1409 | int wpipe) | |
2f77fc4b | 1410 | { |
e5f5db7f | 1411 | int ret, channel_created = 0; |
2f77fc4b DG |
1412 | struct lttng_channel *attr; |
1413 | ||
1414 | assert(session); | |
1415 | assert(event); | |
1416 | assert(channel_name); | |
1417 | ||
18a720cd MD |
1418 | DBG("Enable event command for event \'%s\'", event->name); |
1419 | ||
1420 | /* Special handling for kernel domain all events. */ | |
1421 | if (domain->type == LTTNG_DOMAIN_KERNEL && !strcmp(event->name, "*")) { | |
1422 | return enable_kevent_all(session, domain, channel_name, event, | |
1423 | filter_expression, filter, wpipe); | |
1424 | } | |
1425 | ||
930a2e99 JG |
1426 | ret = validate_event_name(event->name); |
1427 | if (ret) { | |
1428 | goto error; | |
1429 | } | |
1430 | ||
2223c96f DG |
1431 | rcu_read_lock(); |
1432 | ||
7972aab2 | 1433 | switch (domain->type) { |
2f77fc4b DG |
1434 | case LTTNG_DOMAIN_KERNEL: |
1435 | { | |
1436 | struct ltt_kernel_channel *kchan; | |
1437 | ||
85076754 MD |
1438 | /* |
1439 | * If a non-default channel has been created in the | |
1440 | * session, explicitely require that -c chan_name needs | |
1441 | * to be provided. | |
1442 | */ | |
1443 | if (session->kernel_session->has_non_default_channel | |
1444 | && channel_name[0] == '\0') { | |
1445 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1446 | goto error; | |
1447 | } | |
1448 | ||
2f77fc4b DG |
1449 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1450 | session->kernel_session); | |
1451 | if (kchan == NULL) { | |
0a9c6494 DG |
1452 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1453 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1454 | if (attr == NULL) { |
f73fabfd | 1455 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1456 | goto error; |
1457 | } | |
1458 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1459 | ||
1460 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1461 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1462 | free(attr); |
1463 | goto error; | |
1464 | } | |
1465 | free(attr); | |
e5f5db7f DG |
1466 | |
1467 | channel_created = 1; | |
2f77fc4b DG |
1468 | } |
1469 | ||
1470 | /* Get the newly created kernel channel pointer */ | |
1471 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1472 | session->kernel_session); | |
1473 | if (kchan == NULL) { | |
1474 | /* This sould not happen... */ | |
f73fabfd | 1475 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1476 | goto error; |
1477 | } | |
1478 | ||
6e911cad MD |
1479 | switch (event->type) { |
1480 | case LTTNG_EVENT_ALL: | |
6e6ef3d7 DG |
1481 | case LTTNG_EVENT_PROBE: |
1482 | case LTTNG_EVENT_FUNCTION: | |
1483 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad MD |
1484 | case LTTNG_EVENT_TRACEPOINT: |
1485 | ret = event_kernel_enable_tracepoint(kchan, event); | |
1486 | if (ret != LTTNG_OK) { | |
1487 | if (channel_created) { | |
1488 | /* Let's not leak a useless channel. */ | |
1489 | kernel_destroy_channel(kchan); | |
1490 | } | |
1491 | goto error; | |
e5f5db7f | 1492 | } |
6e911cad MD |
1493 | break; |
1494 | case LTTNG_EVENT_SYSCALL: | |
1495 | ret = event_kernel_enable_syscall(kchan, event->name); | |
e2b957af MD |
1496 | if (ret != LTTNG_OK) { |
1497 | goto error; | |
1498 | } | |
6e911cad MD |
1499 | break; |
1500 | default: | |
1501 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1502 | goto error; |
1503 | } | |
1504 | ||
1505 | kernel_wait_quiescent(kernel_tracer_fd); | |
1506 | break; | |
1507 | } | |
1508 | case LTTNG_DOMAIN_UST: | |
1509 | { | |
1510 | struct ltt_ust_channel *uchan; | |
1511 | struct ltt_ust_session *usess = session->ust_session; | |
1512 | ||
1513 | assert(usess); | |
1514 | ||
85076754 MD |
1515 | /* |
1516 | * If a non-default channel has been created in the | |
1517 | * session, explicitely require that -c chan_name needs | |
1518 | * to be provided. | |
1519 | */ | |
1520 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1521 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1522 | goto error; | |
1523 | } | |
1524 | ||
2f77fc4b DG |
1525 | /* Get channel from global UST domain */ |
1526 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1527 | channel_name); | |
1528 | if (uchan == NULL) { | |
1529 | /* Create default channel */ | |
0a9c6494 DG |
1530 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1531 | usess->buffer_type); | |
2f77fc4b | 1532 | if (attr == NULL) { |
f73fabfd | 1533 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1534 | goto error; |
1535 | } | |
1536 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1537 | ||
1538 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1539 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1540 | free(attr); |
1541 | goto error; | |
1542 | } | |
1543 | free(attr); | |
1544 | ||
1545 | /* Get the newly created channel reference back */ | |
1546 | uchan = trace_ust_find_channel_by_name( | |
1547 | usess->domain_global.channels, channel_name); | |
1548 | assert(uchan); | |
1549 | } | |
1550 | ||
1551 | /* At this point, the session and channel exist on the tracer */ | |
6b453b5e JG |
1552 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
1553 | filter_expression, filter, exclusion); | |
faa9eb17 MD |
1554 | /* We have passed ownership */ |
1555 | filter_expression = NULL; | |
1556 | filter = NULL; | |
1557 | exclusion = NULL; | |
f73fabfd | 1558 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1559 | goto error; |
1560 | } | |
1561 | break; | |
1562 | } | |
5cdb6027 | 1563 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1564 | case LTTNG_DOMAIN_JUL: |
1565 | { | |
da6c3a50 | 1566 | const char *default_event_name, *default_chan_name; |
fefd409b | 1567 | struct agent *agt; |
f20baf8e DG |
1568 | struct lttng_event uevent; |
1569 | struct lttng_domain tmp_dom; | |
1570 | struct ltt_ust_session *usess = session->ust_session; | |
1571 | ||
1572 | assert(usess); | |
1573 | ||
5cdb6027 | 1574 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 1575 | if (!agt) { |
5cdb6027 | 1576 | agt = agent_create(domain->type); |
fefd409b DG |
1577 | if (!agt) { |
1578 | ret = -LTTNG_ERR_NOMEM; | |
1579 | goto error; | |
1580 | } | |
1581 | agent_add(agt, usess->agents); | |
1582 | } | |
1583 | ||
022d91ba | 1584 | /* Create the default tracepoint. */ |
996de3c7 | 1585 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
1586 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1587 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
da6c3a50 DG |
1588 | default_event_name = event_get_default_agent_ust_name(domain->type); |
1589 | if (!default_event_name) { | |
1590 | ret = -LTTNG_ERR_FATAL; | |
1591 | goto error; | |
f43f95a9 | 1592 | } |
da6c3a50 | 1593 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
1594 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1595 | ||
1596 | /* | |
1597 | * The domain type is changed because we are about to enable the | |
1598 | * default channel and event for the JUL domain that are hardcoded. | |
1599 | * This happens in the UST domain. | |
1600 | */ | |
1601 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1602 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1603 | ||
da6c3a50 DG |
1604 | if (domain->type == LTTNG_DOMAIN_LOG4J) { |
1605 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
1606 | } else { | |
1607 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; | |
1608 | } | |
1609 | ||
0f9981d0 JG |
1610 | { |
1611 | struct lttng_filter_bytecode *filter_copy = NULL; | |
1612 | ||
1613 | if (filter) { | |
1614 | filter_copy = zmalloc( | |
1615 | sizeof(struct lttng_filter_bytecode) | |
1616 | + filter->len); | |
1617 | if (!filter_copy) { | |
1618 | goto error; | |
1619 | } | |
1620 | ||
1621 | memcpy(filter_copy, filter, | |
1622 | sizeof(struct lttng_filter_bytecode) | |
1623 | + filter->len); | |
1624 | } | |
1625 | ||
1626 | ret = cmd_enable_event(session, &tmp_dom, | |
1627 | (char *) default_chan_name, | |
1628 | &uevent, filter_expression, filter_copy, | |
1629 | NULL, wpipe); | |
1630 | /* We have passed ownership */ | |
1631 | filter_expression = NULL; | |
1632 | } | |
1633 | ||
f20baf8e DG |
1634 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1635 | goto error; | |
1636 | } | |
1637 | ||
1638 | /* The wild card * means that everything should be enabled. */ | |
1639 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
fefd409b | 1640 | ret = event_agent_enable_all(usess, agt, event, filter); |
0f9981d0 | 1641 | filter = NULL; |
f20baf8e | 1642 | } else { |
fefd409b | 1643 | ret = event_agent_enable(usess, agt, event, filter); |
0f9981d0 | 1644 | filter = NULL; |
f20baf8e DG |
1645 | } |
1646 | if (ret != LTTNG_OK) { | |
1647 | goto error; | |
1648 | } | |
1649 | ||
1650 | break; | |
1651 | } | |
2f77fc4b DG |
1652 | #if 0 |
1653 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1654 | case LTTNG_DOMAIN_UST_PID: | |
1655 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1656 | #endif | |
1657 | default: | |
f73fabfd | 1658 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1659 | goto error; |
1660 | } | |
1661 | ||
f73fabfd | 1662 | ret = LTTNG_OK; |
2f77fc4b DG |
1663 | |
1664 | error: | |
faa9eb17 MD |
1665 | free(filter_expression); |
1666 | free(filter); | |
1667 | free(exclusion); | |
2223c96f | 1668 | rcu_read_unlock(); |
2f77fc4b DG |
1669 | return ret; |
1670 | } | |
1671 | ||
1672 | /* | |
18a720cd | 1673 | * Command LTTNG_ENABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1674 | */ |
18a720cd MD |
1675 | static |
1676 | int enable_kevent_all(struct ltt_session *session, | |
1677 | struct lttng_domain *domain, char *channel_name, | |
1678 | struct lttng_event *event, | |
6b453b5e | 1679 | char *filter_expression, |
025faf73 | 1680 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1681 | { |
1682 | int ret; | |
1683 | struct lttng_channel *attr; | |
1684 | ||
1685 | assert(session); | |
1686 | assert(channel_name); | |
1687 | ||
2223c96f DG |
1688 | rcu_read_lock(); |
1689 | ||
7972aab2 | 1690 | switch (domain->type) { |
2f77fc4b DG |
1691 | case LTTNG_DOMAIN_KERNEL: |
1692 | { | |
1693 | struct ltt_kernel_channel *kchan; | |
1694 | ||
1695 | assert(session->kernel_session); | |
1696 | ||
85076754 MD |
1697 | /* |
1698 | * If a non-default channel has been created in the | |
1699 | * session, explicitely require that -c chan_name needs | |
1700 | * to be provided. | |
1701 | */ | |
1702 | if (session->kernel_session->has_non_default_channel | |
1703 | && channel_name[0] == '\0') { | |
1704 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1705 | goto error; | |
1706 | } | |
1707 | ||
2f77fc4b DG |
1708 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1709 | session->kernel_session); | |
1710 | if (kchan == NULL) { | |
1711 | /* Create default channel */ | |
0a9c6494 DG |
1712 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1713 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1714 | if (attr == NULL) { |
f73fabfd | 1715 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1716 | goto error; |
1717 | } | |
1718 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1719 | ||
1720 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1721 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1722 | free(attr); |
1723 | goto error; | |
1724 | } | |
1725 | free(attr); | |
1726 | ||
1727 | /* Get the newly created kernel channel pointer */ | |
1728 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1729 | session->kernel_session); | |
1730 | assert(kchan); | |
1731 | } | |
1732 | ||
18a720cd | 1733 | switch (event->type) { |
2f77fc4b | 1734 | case LTTNG_EVENT_SYSCALL: |
6e911cad | 1735 | ret = event_kernel_enable_syscall(kchan, ""); |
e2b957af MD |
1736 | if (ret != LTTNG_OK) { |
1737 | goto error; | |
1738 | } | |
2f77fc4b DG |
1739 | break; |
1740 | case LTTNG_EVENT_TRACEPOINT: | |
1741 | /* | |
1742 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1743 | * events already registered to the channel. | |
1744 | */ | |
d3a56674 | 1745 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1746 | break; |
1747 | case LTTNG_EVENT_ALL: | |
1748 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1749 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1750 | break; |
1751 | default: | |
f73fabfd | 1752 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1753 | goto error; |
1754 | } | |
1755 | ||
1756 | /* Manage return value */ | |
f73fabfd | 1757 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1758 | /* |
1759 | * On error, cmd_enable_channel call will take care of destroying | |
1760 | * the created channel if it was needed. | |
1761 | */ | |
2f77fc4b DG |
1762 | goto error; |
1763 | } | |
1764 | ||
1765 | kernel_wait_quiescent(kernel_tracer_fd); | |
1766 | break; | |
1767 | } | |
2f77fc4b | 1768 | default: |
f73fabfd | 1769 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1770 | goto error; |
1771 | } | |
1772 | ||
f73fabfd | 1773 | ret = LTTNG_OK; |
2f77fc4b DG |
1774 | |
1775 | error: | |
2223c96f | 1776 | rcu_read_unlock(); |
2f77fc4b DG |
1777 | return ret; |
1778 | } | |
1779 | ||
1780 | ||
1781 | /* | |
1782 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1783 | */ | |
1784 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1785 | { | |
1786 | int ret; | |
1787 | ssize_t nb_events = 0; | |
1788 | ||
1789 | switch (domain) { | |
1790 | case LTTNG_DOMAIN_KERNEL: | |
1791 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1792 | if (nb_events < 0) { | |
f73fabfd | 1793 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1794 | goto error; |
1795 | } | |
1796 | break; | |
1797 | case LTTNG_DOMAIN_UST: | |
1798 | nb_events = ust_app_list_events(events); | |
1799 | if (nb_events < 0) { | |
f73fabfd | 1800 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1801 | goto error; |
1802 | } | |
1803 | break; | |
5cdb6027 | 1804 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 1805 | case LTTNG_DOMAIN_JUL: |
f60140a1 | 1806 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
1807 | if (nb_events < 0) { |
1808 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1809 | goto error; | |
1810 | } | |
1811 | break; | |
2f77fc4b | 1812 | default: |
f73fabfd | 1813 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1814 | goto error; |
1815 | } | |
1816 | ||
1817 | return nb_events; | |
1818 | ||
1819 | error: | |
1820 | /* Return negative value to differentiate return code */ | |
1821 | return -ret; | |
1822 | } | |
1823 | ||
1824 | /* | |
1825 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1826 | */ | |
1827 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1828 | struct lttng_event_field **fields) | |
1829 | { | |
1830 | int ret; | |
1831 | ssize_t nb_fields = 0; | |
1832 | ||
1833 | switch (domain) { | |
1834 | case LTTNG_DOMAIN_UST: | |
1835 | nb_fields = ust_app_list_event_fields(fields); | |
1836 | if (nb_fields < 0) { | |
f73fabfd | 1837 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1838 | goto error; |
1839 | } | |
1840 | break; | |
1841 | case LTTNG_DOMAIN_KERNEL: | |
1842 | default: /* fall-through */ | |
f73fabfd | 1843 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1844 | goto error; |
1845 | } | |
1846 | ||
1847 | return nb_fields; | |
1848 | ||
1849 | error: | |
1850 | /* Return negative value to differentiate return code */ | |
1851 | return -ret; | |
1852 | } | |
1853 | ||
834978fd DG |
1854 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
1855 | { | |
1856 | return syscall_table_list(events); | |
1857 | } | |
1858 | ||
2f77fc4b DG |
1859 | /* |
1860 | * Command LTTNG_START_TRACE processed by the client thread. | |
1861 | */ | |
1862 | int cmd_start_trace(struct ltt_session *session) | |
1863 | { | |
1864 | int ret; | |
cde3e505 | 1865 | unsigned long nb_chan = 0; |
2f77fc4b DG |
1866 | struct ltt_kernel_session *ksession; |
1867 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1868 | |
1869 | assert(session); | |
1870 | ||
1871 | /* Ease our life a bit ;) */ | |
1872 | ksession = session->kernel_session; | |
1873 | usess = session->ust_session; | |
1874 | ||
8382cf6f DG |
1875 | /* Is the session already started? */ |
1876 | if (session->active) { | |
f73fabfd | 1877 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1878 | goto error; |
1879 | } | |
1880 | ||
cde3e505 DG |
1881 | /* |
1882 | * Starting a session without channel is useless since after that it's not | |
1883 | * possible to enable channel thus inform the client. | |
1884 | */ | |
1885 | if (usess && usess->domain_global.channels) { | |
492a6634 | 1886 | rcu_read_lock(); |
cde3e505 | 1887 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); |
492a6634 | 1888 | rcu_read_unlock(); |
cde3e505 DG |
1889 | } |
1890 | if (ksession) { | |
1891 | nb_chan += ksession->channel_count; | |
1892 | } | |
1893 | if (!nb_chan) { | |
1894 | ret = LTTNG_ERR_NO_CHANNEL; | |
1895 | goto error; | |
1896 | } | |
1897 | ||
2f77fc4b DG |
1898 | /* Kernel tracing */ |
1899 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1900 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1901 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1902 | goto error; |
1903 | } | |
2f77fc4b DG |
1904 | } |
1905 | ||
1906 | /* Flag session that trace should start automatically */ | |
1907 | if (usess) { | |
14fb1ebe DG |
1908 | /* |
1909 | * Even though the start trace might fail, flag this session active so | |
1910 | * other application coming in are started by default. | |
1911 | */ | |
1912 | usess->active = 1; | |
2f77fc4b DG |
1913 | |
1914 | ret = ust_app_start_trace_all(usess); | |
1915 | if (ret < 0) { | |
f73fabfd | 1916 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1917 | goto error; |
1918 | } | |
1919 | } | |
1920 | ||
8382cf6f DG |
1921 | /* Flag this after a successful start. */ |
1922 | session->has_been_started = 1; | |
1923 | session->active = 1; | |
9b6c7ec5 | 1924 | |
f73fabfd | 1925 | ret = LTTNG_OK; |
2f77fc4b DG |
1926 | |
1927 | error: | |
1928 | return ret; | |
1929 | } | |
1930 | ||
1931 | /* | |
1932 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1933 | */ | |
1934 | int cmd_stop_trace(struct ltt_session *session) | |
1935 | { | |
1936 | int ret; | |
1937 | struct ltt_kernel_channel *kchan; | |
1938 | struct ltt_kernel_session *ksession; | |
1939 | struct ltt_ust_session *usess; | |
1940 | ||
1941 | assert(session); | |
1942 | ||
1943 | /* Short cut */ | |
1944 | ksession = session->kernel_session; | |
1945 | usess = session->ust_session; | |
1946 | ||
8382cf6f DG |
1947 | /* Session is not active. Skip everythong and inform the client. */ |
1948 | if (!session->active) { | |
f73fabfd | 1949 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1950 | goto error; |
1951 | } | |
1952 | ||
2f77fc4b | 1953 | /* Kernel tracer */ |
14fb1ebe | 1954 | if (ksession && ksession->active) { |
2f77fc4b DG |
1955 | DBG("Stop kernel tracing"); |
1956 | ||
1957 | /* Flush metadata if exist */ | |
1958 | if (ksession->metadata_stream_fd >= 0) { | |
1959 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1960 | if (ret < 0) { | |
1961 | ERR("Kernel metadata flush failed"); | |
1962 | } | |
1963 | } | |
1964 | ||
1965 | /* Flush all buffers before stopping */ | |
1966 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1967 | ret = kernel_flush_buffer(kchan); | |
1968 | if (ret < 0) { | |
1969 | ERR("Kernel flush buffer error"); | |
1970 | } | |
1971 | } | |
1972 | ||
1973 | ret = kernel_stop_session(ksession); | |
1974 | if (ret < 0) { | |
f73fabfd | 1975 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1976 | goto error; |
1977 | } | |
1978 | ||
1979 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 | 1980 | |
14fb1ebe | 1981 | ksession->active = 0; |
2f77fc4b DG |
1982 | } |
1983 | ||
14fb1ebe DG |
1984 | if (usess && usess->active) { |
1985 | /* | |
1986 | * Even though the stop trace might fail, flag this session inactive so | |
1987 | * other application coming in are not started by default. | |
1988 | */ | |
1989 | usess->active = 0; | |
2f77fc4b DG |
1990 | |
1991 | ret = ust_app_stop_trace_all(usess); | |
1992 | if (ret < 0) { | |
f73fabfd | 1993 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1994 | goto error; |
1995 | } | |
1996 | } | |
1997 | ||
8382cf6f DG |
1998 | /* Flag inactive after a successful stop. */ |
1999 | session->active = 0; | |
f73fabfd | 2000 | ret = LTTNG_OK; |
2f77fc4b DG |
2001 | |
2002 | error: | |
2003 | return ret; | |
2004 | } | |
2005 | ||
2006 | /* | |
2007 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2008 | */ | |
9863d1c8 JG |
2009 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, |
2010 | struct lttng_uri *uris) | |
2f77fc4b DG |
2011 | { |
2012 | int ret, i; | |
2013 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2014 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
2015 | |
2016 | assert(session); | |
2017 | assert(uris); | |
2018 | assert(nb_uri > 0); | |
2019 | ||
8382cf6f DG |
2020 | /* Can't set consumer URI if the session is active. */ |
2021 | if (session->active) { | |
f73fabfd | 2022 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2023 | goto error; |
2024 | } | |
2025 | ||
9863d1c8 | 2026 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2027 | for (i = 0; i < nb_uri; i++) { |
9863d1c8 JG |
2028 | ret = add_uri_to_consumer(session->consumer, |
2029 | &uris[i], 0, session->name); | |
a74934ba | 2030 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2031 | goto error; |
2032 | } | |
2f77fc4b DG |
2033 | } |
2034 | ||
9863d1c8 JG |
2035 | /* Set UST session URIs */ |
2036 | if (session->ust_session) { | |
2037 | for (i = 0; i < nb_uri; i++) { | |
2038 | ret = add_uri_to_consumer( | |
2039 | session->ust_session->consumer, | |
2040 | &uris[i], LTTNG_DOMAIN_UST, | |
2041 | session->name); | |
2042 | if (ret != LTTNG_OK) { | |
2043 | goto error; | |
2044 | } | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | /* Set kernel session URIs */ | |
2049 | if (session->kernel_session) { | |
2050 | for (i = 0; i < nb_uri; i++) { | |
2051 | ret = add_uri_to_consumer( | |
2052 | session->kernel_session->consumer, | |
2053 | &uris[i], LTTNG_DOMAIN_KERNEL, | |
2054 | session->name); | |
2055 | if (ret != LTTNG_OK) { | |
2056 | goto error; | |
2057 | } | |
2058 | } | |
2059 | } | |
2060 | ||
7ab70fe0 DG |
2061 | /* |
2062 | * Make sure to set the session in output mode after we set URI since a | |
2063 | * session can be created without URL (thus flagged in no output mode). | |
2064 | */ | |
2065 | session->output_traces = 1; | |
2066 | if (ksess) { | |
2067 | ksess->output_traces = 1; | |
9863d1c8 JG |
2068 | } |
2069 | ||
2070 | if (usess) { | |
7ab70fe0 DG |
2071 | usess->output_traces = 1; |
2072 | } | |
2073 | ||
2f77fc4b | 2074 | /* All good! */ |
f73fabfd | 2075 | ret = LTTNG_OK; |
2f77fc4b DG |
2076 | |
2077 | error: | |
2078 | return ret; | |
2079 | } | |
2080 | ||
2081 | /* | |
2082 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2083 | */ | |
2084 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2085 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2086 | { |
2087 | int ret; | |
2f77fc4b DG |
2088 | struct ltt_session *session; |
2089 | ||
2090 | assert(name); | |
2bba9e53 | 2091 | assert(creds); |
785d2d0d | 2092 | |
2f77fc4b DG |
2093 | /* |
2094 | * Verify if the session already exist | |
2095 | * | |
2096 | * XXX: There is no need for the session lock list here since the caller | |
2097 | * (process_client_msg) is holding it. We might want to change that so a | |
2098 | * single command does not lock the entire session list. | |
2099 | */ | |
2100 | session = session_find_by_name(name); | |
2101 | if (session != NULL) { | |
f73fabfd | 2102 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2103 | goto find_error; |
2104 | } | |
2105 | ||
2106 | /* Create tracing session in the registry */ | |
dec56f6c | 2107 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2108 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2109 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2110 | goto session_error; |
2111 | } | |
2112 | ||
2113 | /* | |
2114 | * Get the newly created session pointer back | |
2115 | * | |
2116 | * XXX: There is no need for the session lock list here since the caller | |
2117 | * (process_client_msg) is holding it. We might want to change that so a | |
2118 | * single command does not lock the entire session list. | |
2119 | */ | |
2120 | session = session_find_by_name(name); | |
2121 | assert(session); | |
2122 | ||
ecc48a90 | 2123 | session->live_timer = live_timer; |
2f77fc4b DG |
2124 | /* Create default consumer output for the session not yet created. */ |
2125 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2126 | if (session->consumer == NULL) { | |
f73fabfd | 2127 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2128 | goto consumer_error; |
2129 | } | |
2130 | ||
2bba9e53 | 2131 | if (uris) { |
9863d1c8 | 2132 | ret = cmd_set_consumer_uri(session, nb_uri, uris); |
2bba9e53 DG |
2133 | if (ret != LTTNG_OK) { |
2134 | goto consumer_error; | |
2135 | } | |
2136 | session->output_traces = 1; | |
2137 | } else { | |
2138 | session->output_traces = 0; | |
2139 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2140 | } |
2141 | ||
2142 | session->consumer->enabled = 1; | |
2143 | ||
f73fabfd | 2144 | return LTTNG_OK; |
2f77fc4b DG |
2145 | |
2146 | consumer_error: | |
2147 | session_destroy(session); | |
2148 | session_error: | |
2149 | find_error: | |
2150 | return ret; | |
2151 | } | |
2152 | ||
27babd3a DG |
2153 | /* |
2154 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2155 | */ | |
2156 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2157 | size_t nb_uri, lttng_sock_cred *creds) | |
2158 | { | |
2159 | int ret; | |
2160 | struct ltt_session *session; | |
2161 | struct snapshot_output *new_output = NULL; | |
2162 | ||
2163 | assert(name); | |
2164 | assert(creds); | |
2165 | ||
2166 | /* | |
2167 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2168 | * received are for a default snapshot output if one. | |
2169 | */ | |
ecc48a90 | 2170 | ret = cmd_create_session_uri(name, NULL, 0, creds, -1); |
27babd3a DG |
2171 | if (ret != LTTNG_OK) { |
2172 | goto error; | |
2173 | } | |
2174 | ||
2175 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2176 | session = session_find_by_name(name); | |
2177 | assert(session); | |
2178 | ||
2179 | /* Flag session for snapshot mode. */ | |
2180 | session->snapshot_mode = 1; | |
2181 | ||
2182 | /* Skip snapshot output creation if no URI is given. */ | |
2183 | if (nb_uri == 0) { | |
2184 | goto end; | |
2185 | } | |
2186 | ||
2187 | new_output = snapshot_output_alloc(); | |
2188 | if (!new_output) { | |
2189 | ret = LTTNG_ERR_NOMEM; | |
2190 | goto error_snapshot_alloc; | |
2191 | } | |
2192 | ||
2193 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2194 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2195 | if (ret < 0) { | |
2196 | if (ret == -ENOMEM) { | |
2197 | ret = LTTNG_ERR_NOMEM; | |
2198 | } else { | |
2199 | ret = LTTNG_ERR_INVALID; | |
2200 | } | |
2201 | goto error_snapshot; | |
2202 | } | |
2203 | ||
2204 | rcu_read_lock(); | |
2205 | snapshot_add_output(&session->snapshot, new_output); | |
2206 | rcu_read_unlock(); | |
2207 | ||
2208 | end: | |
2209 | return LTTNG_OK; | |
2210 | ||
2211 | error_snapshot: | |
2212 | snapshot_output_destroy(new_output); | |
2213 | error_snapshot_alloc: | |
2214 | session_destroy(session); | |
2215 | error: | |
2216 | return ret; | |
2217 | } | |
2218 | ||
2f77fc4b DG |
2219 | /* |
2220 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2221 | */ | |
2222 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2223 | { | |
2224 | int ret; | |
2225 | struct ltt_ust_session *usess; | |
2226 | struct ltt_kernel_session *ksess; | |
2227 | ||
2228 | /* Safety net */ | |
2229 | assert(session); | |
2230 | ||
2231 | usess = session->ust_session; | |
2232 | ksess = session->kernel_session; | |
2233 | ||
2234 | /* Clean kernel session teardown */ | |
2235 | kernel_destroy_session(ksess); | |
2236 | ||
2237 | /* UST session teardown */ | |
2238 | if (usess) { | |
2239 | /* Close any relayd session */ | |
2240 | consumer_output_send_destroy_relayd(usess->consumer); | |
2241 | ||
2242 | /* Destroy every UST application related to this session. */ | |
2243 | ret = ust_app_destroy_trace_all(usess); | |
2244 | if (ret) { | |
2245 | ERR("Error in ust_app_destroy_trace_all"); | |
2246 | } | |
2247 | ||
2248 | /* Clean up the rest. */ | |
2249 | trace_ust_destroy_session(usess); | |
2250 | } | |
2251 | ||
2252 | /* | |
2253 | * Must notify the kernel thread here to update it's poll set in order to | |
2254 | * remove the channel(s)' fd just destroyed. | |
2255 | */ | |
2256 | ret = notify_thread_pipe(wpipe); | |
2257 | if (ret < 0) { | |
2258 | PERROR("write kernel poll pipe"); | |
2259 | } | |
2260 | ||
2261 | ret = session_destroy(session); | |
2262 | ||
2263 | return ret; | |
2264 | } | |
2265 | ||
2266 | /* | |
2267 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2268 | */ | |
2269 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2270 | { | |
2271 | int ret; | |
2272 | ||
2273 | switch (domain) { | |
2274 | case LTTNG_DOMAIN_KERNEL: | |
2275 | { | |
2276 | struct lttng_kernel_calibrate kcalibrate; | |
2277 | ||
2e84128e DG |
2278 | switch (calibrate->type) { |
2279 | case LTTNG_CALIBRATE_FUNCTION: | |
2280 | default: | |
2281 | /* Default and only possible calibrate option. */ | |
2282 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2283 | break; | |
2284 | } | |
2285 | ||
2f77fc4b DG |
2286 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2287 | if (ret < 0) { | |
f73fabfd | 2288 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2289 | goto error; |
2290 | } | |
2291 | break; | |
2292 | } | |
2293 | case LTTNG_DOMAIN_UST: | |
2294 | { | |
2295 | struct lttng_ust_calibrate ucalibrate; | |
2296 | ||
2e84128e DG |
2297 | switch (calibrate->type) { |
2298 | case LTTNG_CALIBRATE_FUNCTION: | |
2299 | default: | |
2300 | /* Default and only possible calibrate option. */ | |
2301 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2302 | break; | |
2303 | } | |
2304 | ||
2f77fc4b DG |
2305 | ret = ust_app_calibrate_glb(&ucalibrate); |
2306 | if (ret < 0) { | |
f73fabfd | 2307 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2308 | goto error; |
2309 | } | |
2310 | break; | |
2311 | } | |
2312 | default: | |
f73fabfd | 2313 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2314 | goto error; |
2315 | } | |
2316 | ||
f73fabfd | 2317 | ret = LTTNG_OK; |
2f77fc4b DG |
2318 | |
2319 | error: | |
2320 | return ret; | |
2321 | } | |
2322 | ||
2323 | /* | |
2324 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2325 | */ | |
2326 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2327 | const char *sock_path, struct consumer_data *cdata) | |
2328 | { | |
2329 | int ret, sock; | |
dd81b457 | 2330 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2331 | |
2332 | assert(session); | |
2333 | assert(cdata); | |
2334 | assert(sock_path); | |
2335 | ||
2336 | switch (domain) { | |
2337 | case LTTNG_DOMAIN_KERNEL: | |
2338 | { | |
2339 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2340 | ||
2341 | assert(ksess); | |
2342 | ||
2343 | /* Can't register a consumer if there is already one */ | |
2344 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2345 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2346 | goto error; |
2347 | } | |
2348 | ||
2349 | sock = lttcomm_connect_unix_sock(sock_path); | |
2350 | if (sock < 0) { | |
f73fabfd | 2351 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2352 | goto error; |
2353 | } | |
4ce514c4 | 2354 | cdata->cmd_sock = sock; |
2f77fc4b | 2355 | |
4ce514c4 | 2356 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2357 | if (socket == NULL) { |
f66c074c DG |
2358 | ret = close(sock); |
2359 | if (ret < 0) { | |
2360 | PERROR("close register consumer"); | |
2361 | } | |
4ce514c4 | 2362 | cdata->cmd_sock = -1; |
f73fabfd | 2363 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2364 | goto error; |
2365 | } | |
2366 | ||
2367 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2368 | if (socket->lock == NULL) { | |
2369 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2370 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2371 | goto error; |
2372 | } | |
2373 | pthread_mutex_init(socket->lock, NULL); | |
2374 | socket->registered = 1; | |
2375 | ||
2376 | rcu_read_lock(); | |
2377 | consumer_add_socket(socket, ksess->consumer); | |
2378 | rcu_read_unlock(); | |
2379 | ||
2380 | pthread_mutex_lock(&cdata->pid_mutex); | |
2381 | cdata->pid = -1; | |
2382 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2383 | ||
2384 | break; | |
2385 | } | |
2386 | default: | |
2387 | /* TODO: Userspace tracing */ | |
f73fabfd | 2388 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2389 | goto error; |
2390 | } | |
2391 | ||
dd81b457 | 2392 | return LTTNG_OK; |
2f77fc4b DG |
2393 | |
2394 | error: | |
dd81b457 DG |
2395 | if (socket) { |
2396 | consumer_destroy_socket(socket); | |
2397 | } | |
2f77fc4b DG |
2398 | return ret; |
2399 | } | |
2400 | ||
2401 | /* | |
2402 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2403 | */ | |
2404 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2405 | struct lttng_domain **domains) | |
2406 | { | |
2407 | int ret, index = 0; | |
2408 | ssize_t nb_dom = 0; | |
fefd409b DG |
2409 | struct agent *agt; |
2410 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2411 | |
2412 | if (session->kernel_session != NULL) { | |
2413 | DBG3("Listing domains found kernel domain"); | |
2414 | nb_dom++; | |
2415 | } | |
2416 | ||
2417 | if (session->ust_session != NULL) { | |
2418 | DBG3("Listing domains found UST global domain"); | |
2419 | nb_dom++; | |
3c6a091f | 2420 | |
f376cc6a | 2421 | rcu_read_lock(); |
fefd409b DG |
2422 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2423 | agt, node.node) { | |
2424 | if (agt->being_used) { | |
2425 | nb_dom++; | |
2426 | } | |
3c6a091f | 2427 | } |
f376cc6a | 2428 | rcu_read_unlock(); |
2f77fc4b DG |
2429 | } |
2430 | ||
2431 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
2432 | if (*domains == NULL) { | |
f73fabfd | 2433 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2434 | goto error; |
2435 | } | |
2436 | ||
2437 | if (session->kernel_session != NULL) { | |
2438 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
2439 | index++; | |
2440 | } | |
2441 | ||
2442 | if (session->ust_session != NULL) { | |
2443 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2444 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2445 | index++; |
3c6a091f | 2446 | |
f376cc6a | 2447 | rcu_read_lock(); |
fefd409b DG |
2448 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2449 | agt, node.node) { | |
2450 | if (agt->being_used) { | |
2451 | (*domains)[index].type = agt->domain; | |
2452 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2453 | index++; | |
2454 | } | |
3c6a091f | 2455 | } |
f376cc6a | 2456 | rcu_read_unlock(); |
2f77fc4b DG |
2457 | } |
2458 | ||
2459 | return nb_dom; | |
2460 | ||
2461 | error: | |
f73fabfd DG |
2462 | /* Return negative value to differentiate return code */ |
2463 | return -ret; | |
2f77fc4b DG |
2464 | } |
2465 | ||
2466 | ||
2467 | /* | |
2468 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2469 | */ | |
2470 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2471 | struct lttng_channel **channels) | |
2472 | { | |
2473 | int ret; | |
2474 | ssize_t nb_chan = 0; | |
2475 | ||
2476 | switch (domain) { | |
2477 | case LTTNG_DOMAIN_KERNEL: | |
2478 | if (session->kernel_session != NULL) { | |
2479 | nb_chan = session->kernel_session->channel_count; | |
2480 | } | |
2481 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2482 | if (nb_chan <= 0) { |
2483 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2484 | } | |
2f77fc4b DG |
2485 | break; |
2486 | case LTTNG_DOMAIN_UST: | |
2487 | if (session->ust_session != NULL) { | |
db81f999 | 2488 | rcu_read_lock(); |
2f77fc4b | 2489 | nb_chan = lttng_ht_get_count( |
db81f999 JG |
2490 | session->ust_session->domain_global.channels); |
2491 | rcu_read_unlock(); | |
2f77fc4b DG |
2492 | } |
2493 | DBG3("Number of UST global channels %zd", nb_chan); | |
9247b8d0 | 2494 | if (nb_chan < 0) { |
c7d620a2 | 2495 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
9247b8d0 | 2496 | goto error; |
c7d620a2 | 2497 | } |
2f77fc4b DG |
2498 | break; |
2499 | default: | |
f73fabfd | 2500 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2501 | goto error; |
2502 | } | |
2503 | ||
2504 | if (nb_chan > 0) { | |
2505 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2506 | if (*channels == NULL) { | |
f73fabfd | 2507 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2508 | goto error; |
2509 | } | |
2510 | ||
2511 | list_lttng_channels(domain, session, *channels); | |
2f77fc4b DG |
2512 | } |
2513 | ||
2514 | return nb_chan; | |
2515 | ||
2516 | error: | |
f73fabfd DG |
2517 | /* Return negative value to differentiate return code */ |
2518 | return -ret; | |
2f77fc4b DG |
2519 | } |
2520 | ||
2521 | /* | |
2522 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2523 | */ | |
2524 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2525 | char *channel_name, struct lttng_event **events) | |
2526 | { | |
2527 | int ret = 0; | |
2528 | ssize_t nb_event = 0; | |
2529 | ||
2530 | switch (domain) { | |
2531 | case LTTNG_DOMAIN_KERNEL: | |
2532 | if (session->kernel_session != NULL) { | |
2533 | nb_event = list_lttng_kernel_events(channel_name, | |
2534 | session->kernel_session, events); | |
2535 | } | |
2536 | break; | |
2537 | case LTTNG_DOMAIN_UST: | |
2538 | { | |
2539 | if (session->ust_session != NULL) { | |
2540 | nb_event = list_lttng_ust_global_events(channel_name, | |
2541 | &session->ust_session->domain_global, events); | |
2542 | } | |
2543 | break; | |
2544 | } | |
5cdb6027 | 2545 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f DG |
2546 | case LTTNG_DOMAIN_JUL: |
2547 | if (session->ust_session) { | |
fefd409b DG |
2548 | struct lttng_ht_iter iter; |
2549 | struct agent *agt; | |
2550 | ||
a3f99e26 | 2551 | rcu_read_lock(); |
fefd409b DG |
2552 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
2553 | &iter.iter, agt, node.node) { | |
2554 | nb_event = list_lttng_agent_events(agt, events); | |
2555 | } | |
a3f99e26 | 2556 | rcu_read_unlock(); |
3c6a091f DG |
2557 | } |
2558 | break; | |
2f77fc4b | 2559 | default: |
f73fabfd | 2560 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2561 | goto error; |
2562 | } | |
2563 | ||
f73fabfd | 2564 | return nb_event; |
2f77fc4b DG |
2565 | |
2566 | error: | |
f73fabfd DG |
2567 | /* Return negative value to differentiate return code */ |
2568 | return -ret; | |
2f77fc4b DG |
2569 | } |
2570 | ||
2571 | /* | |
2572 | * Using the session list, filled a lttng_session array to send back to the | |
2573 | * client for session listing. | |
2574 | * | |
2575 | * The session list lock MUST be acquired before calling this function. Use | |
2576 | * session_lock_list() and session_unlock_list(). | |
2577 | */ | |
2578 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2579 | gid_t gid) | |
2580 | { | |
2581 | int ret; | |
2582 | unsigned int i = 0; | |
2583 | struct ltt_session *session; | |
2584 | struct ltt_session_list *list = session_get_list(); | |
2585 | ||
2586 | DBG("Getting all available session for UID %d GID %d", | |
2587 | uid, gid); | |
2588 | /* | |
2589 | * Iterate over session list and append data after the control struct in | |
2590 | * the buffer. | |
2591 | */ | |
2592 | cds_list_for_each_entry(session, &list->head, list) { | |
2593 | /* | |
2594 | * Only list the sessions the user can control. | |
2595 | */ | |
2596 | if (!session_access_ok(session, uid, gid)) { | |
2597 | continue; | |
2598 | } | |
2599 | ||
2600 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2601 | struct ltt_ust_session *usess = session->ust_session; | |
2602 | ||
2603 | if (session->consumer->type == CONSUMER_DST_NET || | |
2604 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2605 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2606 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2607 | sizeof(sessions[i].path), session); |
2f77fc4b | 2608 | } else { |
dec56f6c | 2609 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2610 | session->consumer->dst.trace_path); |
2611 | } | |
2612 | if (ret < 0) { | |
2613 | PERROR("snprintf session path"); | |
2614 | continue; | |
2615 | } | |
2616 | ||
2617 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2618 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 2619 | sessions[i].enabled = session->active; |
2cbf8fed | 2620 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 2621 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
2622 | i++; |
2623 | } | |
2624 | } | |
2625 | ||
806e2684 | 2626 | /* |
6d805429 | 2627 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2628 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2629 | */ |
6d805429 | 2630 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2631 | { |
2632 | int ret; | |
2633 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2634 | struct ltt_ust_session *usess = session->ust_session; | |
2635 | ||
2636 | assert(session); | |
2637 | ||
2638 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 2639 | if (session->active) { |
806e2684 DG |
2640 | ret = LTTNG_ERR_SESSION_STARTED; |
2641 | goto error; | |
3a89d11a DG |
2642 | } else { |
2643 | /* | |
2644 | * If stopped, just make sure we've started before else the above call | |
2645 | * will always send that there is data pending. | |
2646 | * | |
2647 | * The consumer assumes that when the data pending command is received, | |
2648 | * the trace has been started before or else no output data is written | |
2649 | * by the streams which is a condition for data pending. So, this is | |
2650 | * *VERY* important that we don't ask the consumer before a start | |
2651 | * trace. | |
2652 | */ | |
8382cf6f | 2653 | if (!session->has_been_started) { |
3a89d11a DG |
2654 | ret = 0; |
2655 | goto error; | |
2656 | } | |
806e2684 DG |
2657 | } |
2658 | ||
2659 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2660 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2661 | if (ret == 1) { | |
806e2684 DG |
2662 | /* Data is still being extracted for the kernel. */ |
2663 | goto error; | |
2664 | } | |
2665 | } | |
2666 | ||
2667 | if (usess && usess->consumer) { | |
6d805429 DG |
2668 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2669 | if (ret == 1) { | |
806e2684 DG |
2670 | /* Data is still being extracted for the kernel. */ |
2671 | goto error; | |
2672 | } | |
2673 | } | |
2674 | ||
2675 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2676 | ret = 0; |
806e2684 DG |
2677 | |
2678 | error: | |
2679 | return ret; | |
2680 | } | |
2681 | ||
6dc3064a DG |
2682 | /* |
2683 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2684 | * | |
2685 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2686 | */ | |
2687 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2688 | struct lttng_snapshot_output *output, uint32_t *id) | |
2689 | { | |
2690 | int ret; | |
2691 | struct snapshot_output *new_output; | |
2692 | ||
2693 | assert(session); | |
2694 | assert(output); | |
2695 | ||
2696 | DBG("Cmd snapshot add output for session %s", session->name); | |
2697 | ||
2698 | /* | |
d3f14b8a MD |
2699 | * Permission denied to create an output if the session is not |
2700 | * set in no output mode. | |
6dc3064a DG |
2701 | */ |
2702 | if (session->output_traces) { | |
2703 | ret = LTTNG_ERR_EPERM; | |
2704 | goto error; | |
2705 | } | |
2706 | ||
2707 | /* Only one output is allowed until we have the "tee" feature. */ | |
2708 | if (session->snapshot.nb_output == 1) { | |
2709 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2710 | goto error; | |
2711 | } | |
2712 | ||
2713 | new_output = snapshot_output_alloc(); | |
2714 | if (!new_output) { | |
2715 | ret = LTTNG_ERR_NOMEM; | |
2716 | goto error; | |
2717 | } | |
2718 | ||
2719 | ret = snapshot_output_init(output->max_size, output->name, | |
2720 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2721 | &session->snapshot); | |
2722 | if (ret < 0) { | |
2723 | if (ret == -ENOMEM) { | |
2724 | ret = LTTNG_ERR_NOMEM; | |
2725 | } else { | |
2726 | ret = LTTNG_ERR_INVALID; | |
2727 | } | |
2728 | goto free_error; | |
2729 | } | |
2730 | ||
6dc3064a DG |
2731 | rcu_read_lock(); |
2732 | snapshot_add_output(&session->snapshot, new_output); | |
2733 | if (id) { | |
2734 | *id = new_output->id; | |
2735 | } | |
2736 | rcu_read_unlock(); | |
2737 | ||
2738 | return LTTNG_OK; | |
2739 | ||
2740 | free_error: | |
2741 | snapshot_output_destroy(new_output); | |
2742 | error: | |
2743 | return ret; | |
2744 | } | |
2745 | ||
2746 | /* | |
2747 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2748 | * | |
2749 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2750 | */ | |
2751 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2752 | struct lttng_snapshot_output *output) | |
2753 | { | |
2754 | int ret; | |
eb240553 | 2755 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2756 | |
2757 | assert(session); | |
2758 | assert(output); | |
2759 | ||
6dc3064a DG |
2760 | rcu_read_lock(); |
2761 | ||
2762 | /* | |
d3f14b8a MD |
2763 | * Permission denied to create an output if the session is not |
2764 | * set in no output mode. | |
6dc3064a DG |
2765 | */ |
2766 | if (session->output_traces) { | |
2767 | ret = LTTNG_ERR_EPERM; | |
2768 | goto error; | |
2769 | } | |
2770 | ||
eb240553 DG |
2771 | if (output->id) { |
2772 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2773 | session->name); | |
2774 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2775 | } else if (*output->name != '\0') { | |
2776 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2777 | session->name); | |
2778 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2779 | } | |
6dc3064a DG |
2780 | if (!sout) { |
2781 | ret = LTTNG_ERR_INVALID; | |
2782 | goto error; | |
2783 | } | |
2784 | ||
2785 | snapshot_delete_output(&session->snapshot, sout); | |
2786 | snapshot_output_destroy(sout); | |
2787 | ret = LTTNG_OK; | |
2788 | ||
2789 | error: | |
2790 | rcu_read_unlock(); | |
2791 | return ret; | |
2792 | } | |
2793 | ||
2794 | /* | |
2795 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2796 | * | |
2797 | * If no output is available, outputs is untouched and 0 is returned. | |
2798 | * | |
2799 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2800 | */ | |
2801 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2802 | struct lttng_snapshot_output **outputs) | |
2803 | { | |
2804 | int ret, idx = 0; | |
377b9cab | 2805 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
2806 | struct lttng_ht_iter iter; |
2807 | struct snapshot_output *output; | |
2808 | ||
2809 | assert(session); | |
2810 | assert(outputs); | |
2811 | ||
2812 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2813 | ||
2814 | /* | |
d3f14b8a MD |
2815 | * Permission denied to create an output if the session is not |
2816 | * set in no output mode. | |
6dc3064a DG |
2817 | */ |
2818 | if (session->output_traces) { | |
377b9cab | 2819 | ret = -LTTNG_ERR_EPERM; |
6dc3064a DG |
2820 | goto error; |
2821 | } | |
2822 | ||
2823 | if (session->snapshot.nb_output == 0) { | |
2824 | ret = 0; | |
2825 | goto error; | |
2826 | } | |
2827 | ||
2828 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2829 | if (!list) { | |
377b9cab | 2830 | ret = -LTTNG_ERR_NOMEM; |
6dc3064a DG |
2831 | goto error; |
2832 | } | |
2833 | ||
2834 | /* Copy list from session to the new list object. */ | |
377b9cab | 2835 | rcu_read_lock(); |
6dc3064a DG |
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) { | |
377b9cab JG |
2850 | ret = -LTTNG_ERR_NOMEM; |
2851 | goto error; | |
6dc3064a DG |
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) { | |
377b9cab JG |
2858 | ret = -LTTNG_ERR_NOMEM; |
2859 | goto error; | |
6dc3064a DG |
2860 | } |
2861 | } | |
2862 | idx++; | |
2863 | } | |
2864 | ||
2865 | *outputs = list; | |
377b9cab JG |
2866 | list = NULL; |
2867 | ret = session->snapshot.nb_output; | |
6dc3064a | 2868 | error: |
377b9cab JG |
2869 | free(list); |
2870 | rcu_read_unlock(); | |
2871 | return ret; | |
6dc3064a DG |
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 | 2963 | ret = LTTNG_OK; |
fa7fee60 | 2964 | goto end; |
a934f4af | 2965 | |
af706bb7 DG |
2966 | error_snapshot: |
2967 | /* Clean up copied sockets so this output can use some other later on. */ | |
2968 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a | 2969 | error: |
fa7fee60 | 2970 | end: |
6dc3064a DG |
2971 | return ret; |
2972 | } | |
2973 | ||
2974 | /* | |
2975 | * Record a UST snapshot. | |
2976 | * | |
a934f4af | 2977 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
2978 | */ |
2979 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 2980 | struct snapshot_output *output, struct ltt_session *session, |
68808f4e | 2981 | int wait, uint64_t max_stream_size) |
6dc3064a DG |
2982 | { |
2983 | int ret; | |
2984 | ||
2985 | assert(usess); | |
2986 | assert(output); | |
2987 | assert(session); | |
2988 | ||
10a50311 JD |
2989 | /* Get the datetime for the snapshot output directory. */ |
2990 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2991 | sizeof(output->datetime)); | |
2992 | if (!ret) { | |
a934f4af | 2993 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2994 | goto error; |
2995 | } | |
2996 | ||
af706bb7 | 2997 | /* |
d3f14b8a | 2998 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
2999 | * consumer for the snapshot record command. |
3000 | */ | |
3001 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
3002 | if (ret < 0) { | |
a934f4af | 3003 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3004 | goto error; |
6dc3064a DG |
3005 | } |
3006 | ||
3007 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 3008 | if (ret != LTTNG_OK) { |
af706bb7 | 3009 | goto error_snapshot; |
6dc3064a DG |
3010 | } |
3011 | ||
68808f4e | 3012 | ret = ust_app_snapshot_record(usess, output, wait, max_stream_size); |
6dc3064a | 3013 | if (ret < 0) { |
7badf927 DG |
3014 | switch (-ret) { |
3015 | case EINVAL: | |
a934f4af | 3016 | ret = LTTNG_ERR_INVALID; |
7badf927 DG |
3017 | break; |
3018 | case ENODATA: | |
3019 | ret = LTTNG_ERR_SNAPSHOT_NODATA; | |
3020 | break; | |
3021 | default: | |
3022 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
3023 | break; | |
5c786ded | 3024 | } |
af706bb7 | 3025 | goto error_snapshot; |
6dc3064a DG |
3026 | } |
3027 | ||
a934f4af DG |
3028 | ret = LTTNG_OK; |
3029 | ||
af706bb7 DG |
3030 | error_snapshot: |
3031 | /* Clean up copied sockets so this output can use some other later on. */ | |
3032 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
3033 | error: |
3034 | return ret; | |
3035 | } | |
3036 | ||
68808f4e DG |
3037 | /* |
3038 | * Return the biggest subbuffer size of all channels in the given session. | |
3039 | */ | |
3040 | static uint64_t get_session_max_subbuf_size(struct ltt_session *session) | |
3041 | { | |
3042 | uint64_t max_size = 0; | |
3043 | ||
3044 | assert(session); | |
3045 | ||
3046 | if (session->kernel_session) { | |
3047 | struct ltt_kernel_channel *chan; | |
3048 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3049 | ||
3050 | /* | |
3051 | * For each channel, add to the max size the size of each subbuffer | |
3052 | * multiplied by their sized. | |
3053 | */ | |
3054 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { | |
3055 | if (chan->channel->attr.subbuf_size > max_size) { | |
3056 | max_size = chan->channel->attr.subbuf_size; | |
3057 | } | |
3058 | } | |
3059 | } | |
3060 | ||
3061 | if (session->ust_session) { | |
3062 | struct lttng_ht_iter iter; | |
3063 | struct ltt_ust_channel *uchan; | |
3064 | struct ltt_ust_session *usess = session->ust_session; | |
3065 | ||
7756a65d | 3066 | rcu_read_lock(); |
68808f4e DG |
3067 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, |
3068 | uchan, node.node) { | |
3069 | if (uchan->attr.subbuf_size > max_size) { | |
3070 | max_size = uchan->attr.subbuf_size; | |
3071 | } | |
3072 | } | |
7756a65d | 3073 | rcu_read_unlock(); |
68808f4e DG |
3074 | } |
3075 | ||
3076 | return max_size; | |
3077 | } | |
3078 | ||
5c786ded JD |
3079 | /* |
3080 | * Returns the total number of streams for a session or a negative value | |
3081 | * on error. | |
3082 | */ | |
68808f4e | 3083 | static unsigned int get_session_nb_streams(struct ltt_session *session) |
5c786ded JD |
3084 | { |
3085 | unsigned int total_streams = 0; | |
3086 | ||
3087 | if (session->kernel_session) { | |
3088 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3089 | ||
3090 | total_streams += ksess->stream_count_global; | |
3091 | } | |
3092 | ||
3093 | if (session->ust_session) { | |
3094 | struct ltt_ust_session *usess = session->ust_session; | |
3095 | ||
3096 | total_streams += ust_app_get_nb_stream(usess); | |
3097 | } | |
3098 | ||
3099 | return total_streams; | |
3100 | } | |
3101 | ||
6dc3064a DG |
3102 | /* |
3103 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3104 | * | |
3105 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3106 | * complete before returning. | |
3107 | * | |
3108 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3109 | */ | |
3110 | int cmd_snapshot_record(struct ltt_session *session, | |
3111 | struct lttng_snapshot_output *output, int wait) | |
3112 | { | |
3113 | int ret = LTTNG_OK; | |
e1986656 DG |
3114 | unsigned int use_tmp_output = 0; |
3115 | struct snapshot_output tmp_output; | |
1bfe7328 | 3116 | unsigned int nb_streams, snapshot_success = 0; |
68808f4e | 3117 | uint64_t session_max_size = 0, max_stream_size = 0; |
6dc3064a DG |
3118 | |
3119 | assert(session); | |
ba45d9f0 | 3120 | assert(output); |
6dc3064a DG |
3121 | |
3122 | DBG("Cmd snapshot record for session %s", session->name); | |
3123 | ||
3124 | /* | |
d3f14b8a MD |
3125 | * Permission denied to create an output if the session is not |
3126 | * set in no output mode. | |
6dc3064a DG |
3127 | */ |
3128 | if (session->output_traces) { | |
3129 | ret = LTTNG_ERR_EPERM; | |
3130 | goto error; | |
3131 | } | |
3132 | ||
3133 | /* The session needs to be started at least once. */ | |
8382cf6f | 3134 | if (!session->has_been_started) { |
6dc3064a DG |
3135 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3136 | goto error; | |
3137 | } | |
3138 | ||
3139 | /* Use temporary output for the session. */ | |
ba45d9f0 | 3140 | if (*output->ctrl_url != '\0') { |
6dc3064a DG |
3141 | ret = snapshot_output_init(output->max_size, output->name, |
3142 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3143 | &tmp_output, NULL); |
6dc3064a DG |
3144 | if (ret < 0) { |
3145 | if (ret == -ENOMEM) { | |
3146 | ret = LTTNG_ERR_NOMEM; | |
3147 | } else { | |
3148 | ret = LTTNG_ERR_INVALID; | |
3149 | } | |
3150 | goto error; | |
3151 | } | |
1bfe7328 DG |
3152 | /* Use the global session count for the temporary snapshot. */ |
3153 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
e1986656 | 3154 | use_tmp_output = 1; |
6dc3064a DG |
3155 | } |
3156 | ||
5c786ded | 3157 | /* |
68808f4e DG |
3158 | * Get the session maximum size for a snapshot meaning it will compute the |
3159 | * size of all streams from all domain. | |
3160 | */ | |
3161 | max_stream_size = get_session_max_subbuf_size(session); | |
3162 | ||
3163 | nb_streams = get_session_nb_streams(session); | |
3164 | if (nb_streams) { | |
3165 | /* | |
3166 | * The maximum size of the snapshot is the number of streams multiplied | |
3167 | * by the biggest subbuf size of all channels in a session which is the | |
3168 | * maximum stream size available for each stream. The session max size | |
3169 | * is now checked against the snapshot max size value given by the user | |
3170 | * and if lower, an error is returned. | |
3171 | */ | |
3172 | session_max_size = max_stream_size * nb_streams; | |
3173 | } | |
3174 | ||
3175 | DBG3("Snapshot max size is %" PRIu64 " for max stream size of %" PRIu64, | |
3176 | session_max_size, max_stream_size); | |
3177 | ||
3178 | /* | |
3179 | * If we use a temporary output, check right away if the max size fits else | |
3180 | * for each output the max size will be checked. | |
5c786ded | 3181 | */ |
68808f4e DG |
3182 | if (use_tmp_output && |
3183 | (tmp_output.max_size != 0 && | |
3184 | tmp_output.max_size < session_max_size)) { | |
3185 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3186 | goto error; | |
3187 | } | |
5c786ded | 3188 | |
6dc3064a DG |
3189 | if (session->kernel_session) { |
3190 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3191 | ||
e1986656 DG |
3192 | if (use_tmp_output) { |
3193 | ret = record_kernel_snapshot(ksess, &tmp_output, session, | |
68808f4e | 3194 | wait, max_stream_size); |
a934f4af | 3195 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3196 | goto error; |
3197 | } | |
1bfe7328 | 3198 | snapshot_success = 1; |
6dc3064a DG |
3199 | } else { |
3200 | struct snapshot_output *sout; | |
3201 | struct lttng_ht_iter iter; | |
3202 | ||
3203 | rcu_read_lock(); | |
3204 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3205 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3206 | /* |
3207 | * Make a local copy of the output and assign the possible | |
3208 | * temporary value given by the caller. | |
3209 | */ | |
3210 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3211 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3212 | ||
3213 | /* Use temporary max size. */ | |
3214 | if (output->max_size != (uint64_t) -1ULL) { | |
3215 | tmp_output.max_size = output->max_size; | |
3216 | } | |
3217 | ||
68808f4e DG |
3218 | if (tmp_output.max_size != 0 && |
3219 | tmp_output.max_size < session_max_size) { | |
3220 | rcu_read_unlock(); | |
3221 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3222 | goto error; | |
3223 | } | |
3224 | ||
e1986656 DG |
3225 | /* Use temporary name. */ |
3226 | if (*output->name != '\0') { | |
3227 | strncpy(tmp_output.name, output->name, | |
3228 | sizeof(tmp_output.name)); | |
3229 | } | |
3230 | ||
1bfe7328 DG |
3231 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3232 | ||
e1986656 | 3233 | ret = record_kernel_snapshot(ksess, &tmp_output, |
68808f4e | 3234 | session, wait, max_stream_size); |
a934f4af | 3235 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3236 | rcu_read_unlock(); |
3237 | goto error; | |
3238 | } | |
1bfe7328 | 3239 | snapshot_success = 1; |
6dc3064a DG |
3240 | } |
3241 | rcu_read_unlock(); | |
3242 | } | |
3243 | } | |
3244 | ||
3245 | if (session->ust_session) { | |
3246 | struct ltt_ust_session *usess = session->ust_session; | |
3247 | ||
e1986656 DG |
3248 | if (use_tmp_output) { |
3249 | ret = record_ust_snapshot(usess, &tmp_output, session, | |
68808f4e | 3250 | wait, max_stream_size); |
a934f4af | 3251 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3252 | goto error; |
3253 | } | |
1bfe7328 | 3254 | snapshot_success = 1; |
6dc3064a DG |
3255 | } else { |
3256 | struct snapshot_output *sout; | |
3257 | struct lttng_ht_iter iter; | |
3258 | ||
3259 | rcu_read_lock(); | |
3260 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3261 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3262 | /* |
3263 | * Make a local copy of the output and assign the possible | |
3264 | * temporary value given by the caller. | |
3265 | */ | |
3266 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3267 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3268 | ||
e1986656 DG |
3269 | /* Use temporary max size. */ |
3270 | if (output->max_size != (uint64_t) -1ULL) { | |
3271 | tmp_output.max_size = output->max_size; | |
3272 | } | |
3273 | ||
68808f4e DG |
3274 | if (tmp_output.max_size != 0 && |
3275 | tmp_output.max_size < session_max_size) { | |
3276 | rcu_read_unlock(); | |
3277 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3278 | goto error; | |
3279 | } | |
3280 | ||
e1986656 DG |
3281 | /* Use temporary name. */ |
3282 | if (*output->name != '\0') { | |
3283 | strncpy(tmp_output.name, output->name, | |
3284 | sizeof(tmp_output.name)); | |
3285 | } | |
3286 | ||
1bfe7328 DG |
3287 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3288 | ||
e1986656 | 3289 | ret = record_ust_snapshot(usess, &tmp_output, session, |
68808f4e | 3290 | wait, max_stream_size); |
a934f4af | 3291 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3292 | rcu_read_unlock(); |
3293 | goto error; | |
3294 | } | |
1bfe7328 | 3295 | snapshot_success = 1; |
6dc3064a DG |
3296 | } |
3297 | rcu_read_unlock(); | |
3298 | } | |
3299 | } | |
3300 | ||
1bfe7328 DG |
3301 | if (snapshot_success) { |
3302 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3303 | } else { |
3304 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3305 | } |
3306 | ||
6dc3064a | 3307 | error: |
6dc3064a DG |
3308 | return ret; |
3309 | } | |
3310 | ||
2f77fc4b DG |
3311 | /* |
3312 | * Init command subsystem. | |
3313 | */ | |
3314 | void cmd_init(void) | |
3315 | { | |
3316 | /* | |
d88aee68 DG |
3317 | * Set network sequence index to 1 for streams to match a relayd |
3318 | * socket on the consumer side. | |
2f77fc4b | 3319 | */ |
d88aee68 DG |
3320 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3321 | relayd_net_seq_idx = 1; | |
3322 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3323 | |
3324 | DBG("Command subsystem initialized"); | |
3325 | } |