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) { | |
084fe1eb MD |
177 | if (lttng_strncpy(channels[i].name, uchan->name, |
178 | LTTNG_SYMBOL_NAME_LEN)) { | |
179 | break; | |
180 | } | |
2f77fc4b DG |
181 | channels[i].attr.overwrite = uchan->attr.overwrite; |
182 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
183 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
184 | channels[i].attr.switch_timer_interval = | |
185 | uchan->attr.switch_timer_interval; | |
186 | channels[i].attr.read_timer_interval = | |
187 | uchan->attr.read_timer_interval; | |
188 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
189 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
190 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
2f77fc4b DG |
191 | switch (uchan->attr.output) { |
192 | case LTTNG_UST_MMAP: | |
193 | default: | |
194 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
195 | break; | |
196 | } | |
197 | i++; | |
198 | } | |
e7fe706f | 199 | rcu_read_unlock(); |
2f77fc4b DG |
200 | break; |
201 | } | |
202 | default: | |
203 | break; | |
204 | } | |
205 | } | |
206 | ||
3c6a091f | 207 | /* |
022d91ba | 208 | * Create a list of agent domain events. |
3c6a091f DG |
209 | * |
210 | * Return number of events in list on success or else a negative value. | |
211 | */ | |
022d91ba | 212 | static int list_lttng_agent_events(struct agent *agt, |
3c6a091f DG |
213 | struct lttng_event **events) |
214 | { | |
215 | int i = 0, ret = 0; | |
216 | unsigned int nb_event = 0; | |
022d91ba | 217 | struct agent_event *event; |
3c6a091f DG |
218 | struct lttng_event *tmp_events; |
219 | struct lttng_ht_iter iter; | |
220 | ||
022d91ba | 221 | assert(agt); |
3c6a091f DG |
222 | assert(events); |
223 | ||
022d91ba | 224 | DBG3("Listing agent events"); |
3c6a091f | 225 | |
d515217c | 226 | rcu_read_lock(); |
022d91ba | 227 | nb_event = lttng_ht_get_count(agt->events); |
d515217c | 228 | rcu_read_unlock(); |
3c6a091f DG |
229 | if (nb_event == 0) { |
230 | ret = nb_event; | |
231 | goto error; | |
232 | } | |
233 | ||
234 | tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); | |
235 | if (!tmp_events) { | |
022d91ba | 236 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
237 | ret = -LTTNG_ERR_FATAL; |
238 | goto error; | |
239 | } | |
240 | ||
241 | rcu_read_lock(); | |
022d91ba | 242 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
243 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
244 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
245 | tmp_events[i].enabled = event->enabled; | |
ff94328f DG |
246 | tmp_events[i].loglevel = event->loglevel; |
247 | tmp_events[i].loglevel_type = event->loglevel_type; | |
3c6a091f DG |
248 | i++; |
249 | } | |
250 | rcu_read_unlock(); | |
251 | ||
252 | *events = tmp_events; | |
253 | ret = nb_event; | |
254 | ||
255 | error: | |
256 | assert(nb_event == i); | |
257 | return ret; | |
258 | } | |
259 | ||
2f77fc4b DG |
260 | /* |
261 | * Create a list of ust global domain events. | |
262 | */ | |
263 | static int list_lttng_ust_global_events(char *channel_name, | |
264 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
265 | { | |
266 | int i = 0, ret = 0; | |
267 | unsigned int nb_event = 0; | |
268 | struct lttng_ht_iter iter; | |
269 | struct lttng_ht_node_str *node; | |
270 | struct ltt_ust_channel *uchan; | |
271 | struct ltt_ust_event *uevent; | |
272 | struct lttng_event *tmp; | |
273 | ||
274 | DBG("Listing UST global events for channel %s", channel_name); | |
275 | ||
276 | rcu_read_lock(); | |
277 | ||
278 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
279 | node = lttng_ht_iter_get_node_str(&iter); | |
280 | if (node == NULL) { | |
f73fabfd | 281 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
282 | goto error; |
283 | } | |
284 | ||
285 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
286 | ||
287 | nb_event += lttng_ht_get_count(uchan->events); | |
288 | ||
289 | if (nb_event == 0) { | |
290 | ret = nb_event; | |
291 | goto error; | |
292 | } | |
293 | ||
294 | DBG3("Listing UST global %d events", nb_event); | |
295 | ||
296 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
297 | if (tmp == NULL) { | |
f73fabfd | 298 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
299 | goto error; |
300 | } | |
301 | ||
302 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
303 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
304 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
305 | tmp[i].enabled = uevent->enabled; | |
306 | ||
307 | switch (uevent->attr.instrumentation) { | |
308 | case LTTNG_UST_TRACEPOINT: | |
309 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
310 | break; | |
311 | case LTTNG_UST_PROBE: | |
312 | tmp[i].type = LTTNG_EVENT_PROBE; | |
313 | break; | |
314 | case LTTNG_UST_FUNCTION: | |
315 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
316 | break; | |
317 | } | |
318 | ||
319 | tmp[i].loglevel = uevent->attr.loglevel; | |
320 | switch (uevent->attr.loglevel_type) { | |
321 | case LTTNG_UST_LOGLEVEL_ALL: | |
322 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
323 | break; | |
324 | case LTTNG_UST_LOGLEVEL_RANGE: | |
325 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
326 | break; | |
327 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
328 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
329 | break; | |
330 | } | |
331 | if (uevent->filter) { | |
332 | tmp[i].filter = 1; | |
333 | } | |
4634f12e JI |
334 | if (uevent->exclusion) { |
335 | tmp[i].exclusion = 1; | |
336 | } | |
2f77fc4b DG |
337 | i++; |
338 | } | |
339 | ||
340 | ret = nb_event; | |
341 | *events = tmp; | |
342 | ||
343 | error: | |
344 | rcu_read_unlock(); | |
345 | return ret; | |
346 | } | |
347 | ||
348 | /* | |
349 | * Fill lttng_event array of all kernel events in the channel. | |
350 | */ | |
351 | static int list_lttng_kernel_events(char *channel_name, | |
352 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
353 | { | |
354 | int i = 0, ret; | |
355 | unsigned int nb_event; | |
356 | struct ltt_kernel_event *event; | |
357 | struct ltt_kernel_channel *kchan; | |
358 | ||
359 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
360 | if (kchan == NULL) { | |
f73fabfd | 361 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
362 | goto error; |
363 | } | |
364 | ||
365 | nb_event = kchan->event_count; | |
366 | ||
367 | DBG("Listing events for channel %s", kchan->channel->name); | |
368 | ||
369 | if (nb_event == 0) { | |
834978fd DG |
370 | *events = NULL; |
371 | goto syscall; | |
2f77fc4b DG |
372 | } |
373 | ||
374 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
375 | if (*events == NULL) { | |
f73fabfd | 376 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
377 | goto error; |
378 | } | |
379 | ||
380 | /* Kernel channels */ | |
381 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
382 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
383 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
384 | (*events)[i].enabled = event->enabled; | |
385 | ||
386 | switch (event->event->instrumentation) { | |
387 | case LTTNG_KERNEL_TRACEPOINT: | |
388 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
389 | break; | |
2f77fc4b | 390 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
391 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
392 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
393 | sizeof(struct lttng_kernel_kprobe)); | |
394 | break; | |
395 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
396 | (*events)[i].type = LTTNG_EVENT_PROBE; |
397 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
398 | sizeof(struct lttng_kernel_kprobe)); | |
399 | break; | |
400 | case LTTNG_KERNEL_FUNCTION: | |
401 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
402 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
403 | sizeof(struct lttng_kernel_function)); | |
404 | break; | |
405 | case LTTNG_KERNEL_NOOP: | |
406 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
407 | break; | |
408 | case LTTNG_KERNEL_SYSCALL: | |
409 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
410 | break; | |
411 | case LTTNG_KERNEL_ALL: | |
412 | assert(0); | |
413 | break; | |
414 | } | |
415 | i++; | |
416 | } | |
417 | ||
834978fd DG |
418 | syscall: |
419 | if (syscall_table) { | |
420 | ssize_t new_size; | |
421 | ||
422 | new_size = syscall_list_channel(kchan, events, nb_event); | |
423 | if (new_size < 0) { | |
424 | free(events); | |
425 | ret = -new_size; | |
426 | goto error; | |
427 | } | |
428 | nb_event = new_size; | |
429 | } | |
430 | ||
2f77fc4b DG |
431 | return nb_event; |
432 | ||
433 | error: | |
f73fabfd DG |
434 | /* Negate the error code to differentiate the size from an error */ |
435 | return -ret; | |
2f77fc4b DG |
436 | } |
437 | ||
438 | /* | |
439 | * Add URI so the consumer output object. Set the correct path depending on the | |
440 | * domain adding the default trace directory. | |
441 | */ | |
442 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
443 | struct lttng_uri *uri, int domain, const char *session_name) | |
444 | { | |
f73fabfd | 445 | int ret = LTTNG_OK; |
2f77fc4b DG |
446 | const char *default_trace_dir; |
447 | ||
448 | assert(uri); | |
449 | ||
450 | if (consumer == NULL) { | |
451 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 452 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
453 | goto error; |
454 | } | |
455 | ||
456 | switch (domain) { | |
457 | case LTTNG_DOMAIN_KERNEL: | |
458 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
459 | break; | |
460 | case LTTNG_DOMAIN_UST: | |
461 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
462 | break; | |
463 | default: | |
464 | /* | |
465 | * This case is possible is we try to add the URI to the global tracing | |
466 | * session consumer object which in this case there is no subdir. | |
467 | */ | |
468 | default_trace_dir = ""; | |
469 | } | |
470 | ||
471 | switch (uri->dtype) { | |
472 | case LTTNG_DST_IPV4: | |
473 | case LTTNG_DST_IPV6: | |
474 | DBG2("Setting network URI to consumer"); | |
475 | ||
df75acac DG |
476 | if (consumer->type == CONSUMER_DST_NET) { |
477 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
478 | consumer->dst.net.control_isset) || |
479 | (uri->stype == LTTNG_STREAM_DATA && | |
480 | consumer->dst.net.data_isset)) { | |
df75acac DG |
481 | ret = LTTNG_ERR_URL_EXIST; |
482 | goto error; | |
483 | } | |
484 | } else { | |
485 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
486 | } |
487 | ||
df75acac DG |
488 | consumer->type = CONSUMER_DST_NET; |
489 | ||
2f77fc4b DG |
490 | /* Set URI into consumer output object */ |
491 | ret = consumer_set_network_uri(consumer, uri); | |
492 | if (ret < 0) { | |
a74934ba | 493 | ret = -ret; |
2f77fc4b DG |
494 | goto error; |
495 | } else if (ret == 1) { | |
496 | /* | |
497 | * URI was the same in the consumer so we do not append the subdir | |
498 | * again so to not duplicate output dir. | |
499 | */ | |
f86c9f4e | 500 | ret = LTTNG_OK; |
2f77fc4b DG |
501 | goto error; |
502 | } | |
503 | ||
504 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
505 | ret = consumer_set_subdir(consumer, session_name); | |
506 | if (ret < 0) { | |
f73fabfd | 507 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
508 | goto error; |
509 | } | |
510 | } | |
511 | ||
512 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
513 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
514 | strncat(consumer->subdir, default_trace_dir, |
515 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
516 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
517 | } | |
518 | ||
519 | break; | |
520 | case LTTNG_DST_PATH: | |
521 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
522 | memset(consumer->dst.trace_path, 0, | |
523 | sizeof(consumer->dst.trace_path)); | |
c7bc390c MD |
524 | /* Explicit length checks for strcpy and strcat. */ |
525 | if (strlen(uri->dst.path) + strlen(default_trace_dir) | |
526 | >= sizeof(consumer->dst.trace_path)) { | |
527 | ret = LTTNG_ERR_FATAL; | |
528 | goto error; | |
529 | } | |
530 | strcpy(consumer->dst.trace_path, uri->dst.path); | |
2f77fc4b | 531 | /* Append default trace dir */ |
c7bc390c | 532 | strcat(consumer->dst.trace_path, default_trace_dir); |
2f77fc4b DG |
533 | /* Flag consumer as local. */ |
534 | consumer->type = CONSUMER_DST_LOCAL; | |
535 | break; | |
536 | } | |
537 | ||
a74934ba DG |
538 | ret = LTTNG_OK; |
539 | ||
2f77fc4b DG |
540 | error: |
541 | return ret; | |
542 | } | |
543 | ||
544 | /* | |
545 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
546 | */ | |
547 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
548 | { | |
549 | int ret = 0; | |
550 | struct lttng_ht_iter iter; | |
551 | struct consumer_socket *socket; | |
552 | ||
553 | assert(session); | |
554 | ||
e7fe706f DG |
555 | rcu_read_lock(); |
556 | ||
2f77fc4b DG |
557 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
558 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
559 | socket, node.node) { | |
2f77fc4b | 560 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 561 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
562 | pthread_mutex_unlock(socket->lock); |
563 | if (ret < 0) { | |
f73fabfd | 564 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
565 | goto error; |
566 | } | |
567 | } | |
568 | } | |
569 | ||
570 | error: | |
e7fe706f | 571 | rcu_read_unlock(); |
2f77fc4b DG |
572 | return ret; |
573 | } | |
574 | ||
575 | /* | |
576 | * Create a socket to the relayd using the URI. | |
577 | * | |
578 | * On success, the relayd_sock pointer is set to the created socket. | |
579 | * Else, it's stays untouched and a lttcomm error code is returned. | |
580 | */ | |
6151a90f JD |
581 | static int create_connect_relayd(struct lttng_uri *uri, |
582 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
583 | { |
584 | int ret; | |
6151a90f | 585 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 586 | |
6151a90f JD |
587 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
588 | RELAYD_VERSION_COMM_MINOR); | |
589 | if (!rsock) { | |
f73fabfd | 590 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
591 | goto error; |
592 | } | |
593 | ||
ffe60014 DG |
594 | /* |
595 | * Connect to relayd so we can proceed with a session creation. This call | |
596 | * can possibly block for an arbitrary amount of time to set the health | |
597 | * state to be in poll execution. | |
598 | */ | |
599 | health_poll_entry(); | |
6151a90f | 600 | ret = relayd_connect(rsock); |
ffe60014 | 601 | health_poll_exit(); |
2f77fc4b DG |
602 | if (ret < 0) { |
603 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 604 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
605 | goto free_sock; |
606 | } | |
607 | ||
608 | /* Create socket for control stream. */ | |
609 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
610 | DBG3("Creating relayd stream socket from URI"); | |
611 | ||
612 | /* Check relayd version */ | |
6151a90f | 613 | ret = relayd_version_check(rsock); |
2f77fc4b | 614 | if (ret < 0) { |
f73fabfd | 615 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
616 | goto close_sock; |
617 | } | |
618 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
619 | DBG3("Creating relayd data socket from URI"); | |
620 | } else { | |
621 | /* Command is not valid */ | |
622 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 623 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
624 | goto close_sock; |
625 | } | |
626 | ||
6151a90f | 627 | *relayd_sock = rsock; |
2f77fc4b | 628 | |
f73fabfd | 629 | return LTTNG_OK; |
2f77fc4b DG |
630 | |
631 | close_sock: | |
6151a90f JD |
632 | /* The returned value is not useful since we are on an error path. */ |
633 | (void) relayd_close(rsock); | |
2f77fc4b | 634 | free_sock: |
6151a90f | 635 | free(rsock); |
2f77fc4b DG |
636 | error: |
637 | return ret; | |
638 | } | |
639 | ||
640 | /* | |
641 | * Connect to the relayd using URI and send the socket to the right consumer. | |
642 | */ | |
6dc3064a | 643 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 644 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
645 | struct consumer_socket *consumer_sock, |
646 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
647 | { |
648 | int ret; | |
6151a90f | 649 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 650 | |
ffe60014 | 651 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 652 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 653 | if (ret != LTTNG_OK) { |
6151a90f | 654 | goto error; |
ffe60014 | 655 | } |
6151a90f | 656 | assert(rsock); |
ffe60014 | 657 | |
2f77fc4b | 658 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
659 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
660 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
661 | /* |
662 | * Increment net_seq_idx because we are about to transfer the | |
663 | * new relayd socket to the consumer. | |
d88aee68 | 664 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 665 | */ |
d88aee68 DG |
666 | consumer->net_seq_index = ++relayd_net_seq_idx; |
667 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
668 | } |
669 | ||
2f77fc4b | 670 | /* Send relayd socket to consumer. */ |
6151a90f | 671 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
672 | relayd_uri->stype, session_id, |
673 | session_name, hostname, session_live_timer); | |
2f77fc4b | 674 | if (ret < 0) { |
f73fabfd | 675 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
676 | goto close_sock; |
677 | } | |
678 | ||
c890b720 DG |
679 | /* Flag that the corresponding socket was sent. */ |
680 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 681 | consumer_sock->control_sock_sent = 1; |
c890b720 | 682 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 683 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
684 | } |
685 | ||
f73fabfd | 686 | ret = LTTNG_OK; |
2f77fc4b DG |
687 | |
688 | /* | |
689 | * Close socket which was dup on the consumer side. The session daemon does | |
690 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
691 | */ | |
692 | ||
693 | close_sock: | |
6151a90f JD |
694 | (void) relayd_close(rsock); |
695 | free(rsock); | |
2f77fc4b | 696 | |
6151a90f | 697 | error: |
ffe60014 DG |
698 | if (ret != LTTNG_OK) { |
699 | /* | |
d9078d0c DG |
700 | * The consumer output for this session should not be used anymore |
701 | * since the relayd connection failed thus making any tracing or/and | |
702 | * streaming not usable. | |
ffe60014 | 703 | */ |
d9078d0c | 704 | consumer->enabled = 0; |
ffe60014 | 705 | } |
2f77fc4b DG |
706 | return ret; |
707 | } | |
708 | ||
709 | /* | |
710 | * Send both relayd sockets to a specific consumer and domain. This is a | |
711 | * helper function to facilitate sending the information to the consumer for a | |
712 | * session. | |
713 | */ | |
6dc3064a | 714 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
715 | struct consumer_output *consumer, struct consumer_socket *sock, |
716 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 717 | { |
dda67f6c | 718 | int ret = LTTNG_OK; |
2f77fc4b | 719 | |
2f77fc4b | 720 | assert(consumer); |
6dc3064a | 721 | assert(sock); |
2f77fc4b | 722 | |
2f77fc4b | 723 | /* Sending control relayd socket. */ |
ffe60014 | 724 | if (!sock->control_sock_sent) { |
6dc3064a | 725 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
726 | &consumer->dst.net.control, consumer, sock, |
727 | session_name, hostname, session_live_timer); | |
c890b720 DG |
728 | if (ret != LTTNG_OK) { |
729 | goto error; | |
730 | } | |
2f77fc4b DG |
731 | } |
732 | ||
733 | /* Sending data relayd socket. */ | |
ffe60014 | 734 | if (!sock->data_sock_sent) { |
6dc3064a | 735 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
736 | &consumer->dst.net.data, consumer, sock, |
737 | session_name, hostname, session_live_timer); | |
c890b720 DG |
738 | if (ret != LTTNG_OK) { |
739 | goto error; | |
740 | } | |
2f77fc4b DG |
741 | } |
742 | ||
2f77fc4b DG |
743 | error: |
744 | return ret; | |
745 | } | |
746 | ||
747 | /* | |
748 | * Setup relayd connections for a tracing session. First creates the socket to | |
749 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
750 | * network. | |
751 | */ | |
ffe60014 | 752 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 753 | { |
f73fabfd | 754 | int ret = LTTNG_OK; |
2f77fc4b DG |
755 | struct ltt_ust_session *usess; |
756 | struct ltt_kernel_session *ksess; | |
757 | struct consumer_socket *socket; | |
758 | struct lttng_ht_iter iter; | |
759 | ||
760 | assert(session); | |
761 | ||
762 | usess = session->ust_session; | |
763 | ksess = session->kernel_session; | |
764 | ||
785d2d0d | 765 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 766 | |
e7fe706f DG |
767 | rcu_read_lock(); |
768 | ||
2f77fc4b DG |
769 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
770 | && usess->consumer->enabled) { | |
771 | /* For each consumer socket, send relayd sockets */ | |
772 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
773 | socket, node.node) { | |
2f77fc4b | 774 | pthread_mutex_lock(socket->lock); |
6dc3064a | 775 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
776 | usess->consumer, socket, |
777 | session->name, session->hostname, | |
778 | session->live_timer); | |
2f77fc4b | 779 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 780 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
781 | goto error; |
782 | } | |
6dc3064a DG |
783 | /* Session is now ready for network streaming. */ |
784 | session->net_handle = 1; | |
2f77fc4b DG |
785 | } |
786 | } | |
787 | ||
788 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
789 | && ksess->consumer->enabled) { | |
790 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
791 | socket, node.node) { | |
2f77fc4b | 792 | pthread_mutex_lock(socket->lock); |
6dc3064a | 793 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
794 | ksess->consumer, socket, |
795 | session->name, session->hostname, | |
796 | session->live_timer); | |
2f77fc4b | 797 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 798 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
799 | goto error; |
800 | } | |
6dc3064a DG |
801 | /* Session is now ready for network streaming. */ |
802 | session->net_handle = 1; | |
2f77fc4b DG |
803 | } |
804 | } | |
805 | ||
806 | error: | |
e7fe706f | 807 | rcu_read_unlock(); |
2f77fc4b DG |
808 | return ret; |
809 | } | |
810 | ||
9b6c7ec5 DG |
811 | /* |
812 | * Start a kernel session by opening all necessary streams. | |
813 | */ | |
814 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
815 | { | |
816 | int ret; | |
817 | struct ltt_kernel_channel *kchan; | |
818 | ||
819 | /* Open kernel metadata */ | |
07b86b52 | 820 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
821 | ret = kernel_open_metadata(ksess); |
822 | if (ret < 0) { | |
823 | ret = LTTNG_ERR_KERN_META_FAIL; | |
824 | goto error; | |
825 | } | |
826 | } | |
827 | ||
828 | /* Open kernel metadata stream */ | |
07b86b52 | 829 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
830 | ret = kernel_open_metadata_stream(ksess); |
831 | if (ret < 0) { | |
832 | ERR("Kernel create metadata stream failed"); | |
833 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
834 | goto error; | |
835 | } | |
836 | } | |
837 | ||
838 | /* For each channel */ | |
839 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
840 | if (kchan->stream_count == 0) { | |
841 | ret = kernel_open_channel_stream(kchan); | |
842 | if (ret < 0) { | |
843 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
844 | goto error; | |
845 | } | |
846 | /* Update the stream global counter */ | |
847 | ksess->stream_count_global += ret; | |
848 | } | |
849 | } | |
850 | ||
851 | /* Setup kernel consumer socket and send fds to it */ | |
852 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 853 | if (ret != 0) { |
9b6c7ec5 DG |
854 | ret = LTTNG_ERR_KERN_START_FAIL; |
855 | goto error; | |
856 | } | |
857 | ||
858 | /* This start the kernel tracing */ | |
859 | ret = kernel_start_session(ksess); | |
860 | if (ret < 0) { | |
861 | ret = LTTNG_ERR_KERN_START_FAIL; | |
862 | goto error; | |
863 | } | |
864 | ||
865 | /* Quiescent wait after starting trace */ | |
784303b0 | 866 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 867 | |
14fb1ebe | 868 | ksess->active = 1; |
9b6c7ec5 DG |
869 | |
870 | ret = LTTNG_OK; | |
871 | ||
872 | error: | |
873 | return ret; | |
874 | } | |
875 | ||
2f77fc4b DG |
876 | /* |
877 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
878 | */ | |
879 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
880 | char *channel_name) | |
881 | { | |
882 | int ret; | |
883 | struct ltt_ust_session *usess; | |
884 | ||
885 | usess = session->ust_session; | |
886 | ||
2223c96f DG |
887 | rcu_read_lock(); |
888 | ||
2f77fc4b DG |
889 | switch (domain) { |
890 | case LTTNG_DOMAIN_KERNEL: | |
891 | { | |
892 | ret = channel_kernel_disable(session->kernel_session, | |
893 | channel_name); | |
f73fabfd | 894 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
895 | goto error; |
896 | } | |
897 | ||
898 | kernel_wait_quiescent(kernel_tracer_fd); | |
899 | break; | |
900 | } | |
901 | case LTTNG_DOMAIN_UST: | |
902 | { | |
903 | struct ltt_ust_channel *uchan; | |
904 | struct lttng_ht *chan_ht; | |
905 | ||
906 | chan_ht = usess->domain_global.channels; | |
907 | ||
908 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
909 | if (uchan == NULL) { | |
f73fabfd | 910 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
911 | goto error; |
912 | } | |
913 | ||
7972aab2 | 914 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 915 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
916 | goto error; |
917 | } | |
918 | break; | |
919 | } | |
920 | #if 0 | |
921 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
922 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
923 | case LTTNG_DOMAIN_UST_PID: | |
924 | #endif | |
925 | default: | |
f73fabfd | 926 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
927 | goto error; |
928 | } | |
929 | ||
f73fabfd | 930 | ret = LTTNG_OK; |
2f77fc4b DG |
931 | |
932 | error: | |
2223c96f | 933 | rcu_read_unlock(); |
2f77fc4b DG |
934 | return ret; |
935 | } | |
936 | ||
937 | /* | |
938 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
939 | * | |
940 | * The wpipe arguments is used as a notifier for the kernel thread. | |
941 | */ | |
942 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 943 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
944 | { |
945 | int ret; | |
946 | struct ltt_ust_session *usess = session->ust_session; | |
947 | struct lttng_ht *chan_ht; | |
a407f996 | 948 | size_t len; |
2f77fc4b DG |
949 | |
950 | assert(session); | |
951 | assert(attr); | |
7972aab2 | 952 | assert(domain); |
2f77fc4b | 953 | |
a407f996 PP |
954 | len = strnlen(attr->name, sizeof(attr->name)); |
955 | ||
956 | /* Validate channel name */ | |
957 | if (attr->name[0] == '.' || | |
958 | memchr(attr->name, '/', len) != NULL) { | |
959 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
960 | goto end; | |
961 | } | |
962 | ||
2f77fc4b DG |
963 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
964 | ||
03b4fdcf DG |
965 | rcu_read_lock(); |
966 | ||
ecc48a90 JD |
967 | /* |
968 | * Don't try to enable a channel if the session has been started at | |
969 | * some point in time before. The tracer does not allow it. | |
970 | */ | |
8382cf6f | 971 | if (session->has_been_started) { |
ecc48a90 JD |
972 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
973 | goto error; | |
974 | } | |
975 | ||
976 | /* | |
977 | * If the session is a live session, remove the switch timer, the | |
978 | * live timer does the same thing but sends also synchronisation | |
979 | * beacons for inactive streams. | |
980 | */ | |
981 | if (session->live_timer > 0) { | |
982 | attr->attr.live_timer_interval = session->live_timer; | |
983 | attr->attr.switch_timer_interval = 0; | |
984 | } | |
985 | ||
33fbd469 DG |
986 | /* |
987 | * The ringbuffer (both in user space and kernel) behave badly in overwrite | |
988 | * mode and with less than 2 subbuf so block it right away and send back an | |
989 | * invalid attribute error. | |
990 | */ | |
991 | if (attr->attr.overwrite && attr->attr.num_subbuf < 2) { | |
992 | ret = LTTNG_ERR_INVALID; | |
993 | goto error; | |
994 | } | |
995 | ||
7972aab2 | 996 | switch (domain->type) { |
2f77fc4b DG |
997 | case LTTNG_DOMAIN_KERNEL: |
998 | { | |
999 | struct ltt_kernel_channel *kchan; | |
1000 | ||
2f77fc4b DG |
1001 | kchan = trace_kernel_get_channel_by_name(attr->name, |
1002 | session->kernel_session); | |
1003 | if (kchan == NULL) { | |
1004 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
1005 | if (attr->name[0] != '\0') { |
1006 | session->kernel_session->has_non_default_channel = 1; | |
1007 | } | |
2f77fc4b DG |
1008 | } else { |
1009 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1010 | } | |
1011 | ||
f73fabfd | 1012 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1013 | goto error; |
1014 | } | |
1015 | ||
784303b0 | 1016 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
1017 | break; |
1018 | } | |
1019 | case LTTNG_DOMAIN_UST: | |
1020 | { | |
1021 | struct ltt_ust_channel *uchan; | |
1022 | ||
1023 | chan_ht = usess->domain_global.channels; | |
1024 | ||
1025 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
1026 | if (uchan == NULL) { | |
7972aab2 | 1027 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
1028 | if (attr->name[0] != '\0') { |
1029 | usess->has_non_default_channel = 1; | |
1030 | } | |
2f77fc4b | 1031 | } else { |
7972aab2 | 1032 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1033 | } |
1034 | break; | |
1035 | } | |
2f77fc4b | 1036 | default: |
f73fabfd | 1037 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1038 | goto error; |
1039 | } | |
1040 | ||
1041 | error: | |
2223c96f | 1042 | rcu_read_unlock(); |
a407f996 | 1043 | end: |
2f77fc4b DG |
1044 | return ret; |
1045 | } | |
1046 | ||
1047 | ||
1048 | /* | |
1049 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1050 | */ | |
1051 | int cmd_disable_event(struct ltt_session *session, int domain, | |
6e911cad MD |
1052 | char *channel_name, |
1053 | struct lttng_event *event) | |
2f77fc4b DG |
1054 | { |
1055 | int ret; | |
6e911cad MD |
1056 | char *event_name; |
1057 | ||
18a720cd MD |
1058 | DBG("Disable event command for event \'%s\'", event->name); |
1059 | ||
6e911cad MD |
1060 | event_name = event->name; |
1061 | ||
4b9ac515 JG |
1062 | /* Error out on unhandled search criteria */ |
1063 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad MD |
1064 | || event->pid || event->filter || event->exclusion) { |
1065 | return LTTNG_ERR_UNK; | |
1066 | } | |
18a720cd MD |
1067 | /* Special handling for kernel domain all events. */ |
1068 | if (domain == LTTNG_DOMAIN_KERNEL && !strcmp(event_name, "*")) { | |
1069 | return disable_kevent_all(session, domain, channel_name, event); | |
1070 | } | |
2f77fc4b | 1071 | |
2223c96f DG |
1072 | rcu_read_lock(); |
1073 | ||
2f77fc4b DG |
1074 | switch (domain) { |
1075 | case LTTNG_DOMAIN_KERNEL: | |
1076 | { | |
1077 | struct ltt_kernel_channel *kchan; | |
1078 | struct ltt_kernel_session *ksess; | |
1079 | ||
1080 | ksess = session->kernel_session; | |
1081 | ||
85076754 MD |
1082 | /* |
1083 | * If a non-default channel has been created in the | |
1084 | * session, explicitely require that -c chan_name needs | |
1085 | * to be provided. | |
1086 | */ | |
1087 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1088 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1089 | goto error; | |
1090 | } | |
1091 | ||
2f77fc4b DG |
1092 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1093 | if (kchan == NULL) { | |
f73fabfd | 1094 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1095 | goto error; |
1096 | } | |
1097 | ||
6e911cad MD |
1098 | switch (event->type) { |
1099 | case LTTNG_EVENT_ALL: | |
1100 | case LTTNG_EVENT_TRACEPOINT: | |
1101 | ret = event_kernel_disable_tracepoint(kchan, event_name); | |
1102 | if (ret != LTTNG_OK) { | |
1103 | goto error; | |
1104 | } | |
1105 | break; | |
1106 | case LTTNG_EVENT_SYSCALL: | |
1107 | ret = event_kernel_disable_syscall(kchan, event_name); | |
e2b957af MD |
1108 | if (ret != LTTNG_OK) { |
1109 | goto error; | |
1110 | } | |
6e911cad MD |
1111 | break; |
1112 | default: | |
1113 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1114 | goto error; |
1115 | } | |
1116 | ||
1117 | kernel_wait_quiescent(kernel_tracer_fd); | |
1118 | break; | |
1119 | } | |
1120 | case LTTNG_DOMAIN_UST: | |
1121 | { | |
1122 | struct ltt_ust_channel *uchan; | |
1123 | struct ltt_ust_session *usess; | |
1124 | ||
1125 | usess = session->ust_session; | |
1126 | ||
85076754 MD |
1127 | /* |
1128 | * If a non-default channel has been created in the | |
1129 | * session, explicitely require that -c chan_name needs | |
1130 | * to be provided. | |
1131 | */ | |
1132 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1133 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1134 | goto error; | |
1135 | } | |
1136 | ||
2f77fc4b DG |
1137 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1138 | channel_name); | |
1139 | if (uchan == NULL) { | |
f73fabfd | 1140 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1141 | goto error; |
1142 | } | |
1143 | ||
6e911cad MD |
1144 | switch (event->type) { |
1145 | case LTTNG_EVENT_ALL: | |
b05fa712 JR |
1146 | if (strlen(event->name) == 1 && |
1147 | !strncmp(event->name, "*", 1)) { | |
1148 | ret = event_ust_disable_all_tracepoints(usess, | |
1149 | uchan); | |
1150 | } else { | |
1151 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1152 | event_name); | |
1153 | } | |
6e911cad MD |
1154 | if (ret != LTTNG_OK) { |
1155 | goto error; | |
1156 | } | |
1157 | break; | |
1158 | default: | |
1159 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1160 | goto error; |
1161 | } | |
1162 | ||
1163 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1164 | channel_name); | |
1165 | break; | |
1166 | } | |
5cdb6027 | 1167 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1168 | case LTTNG_DOMAIN_JUL: |
1169 | { | |
fefd409b | 1170 | struct agent *agt; |
f20baf8e DG |
1171 | struct ltt_ust_session *usess = session->ust_session; |
1172 | ||
1173 | assert(usess); | |
1174 | ||
6e911cad MD |
1175 | switch (event->type) { |
1176 | case LTTNG_EVENT_ALL: | |
1177 | break; | |
1178 | default: | |
1179 | ret = LTTNG_ERR_UNK; | |
1180 | goto error; | |
1181 | } | |
1182 | ||
5cdb6027 | 1183 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1184 | if (!agt) { |
1185 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
1186 | goto error; | |
1187 | } | |
18a720cd MD |
1188 | /* The wild card * means that everything should be disabled. */ |
1189 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
1190 | ret = event_agent_disable_all(usess, agt); | |
1191 | } else { | |
1192 | ret = event_agent_disable(usess, agt, event_name); | |
1193 | } | |
f20baf8e DG |
1194 | if (ret != LTTNG_OK) { |
1195 | goto error; | |
1196 | } | |
1197 | ||
1198 | break; | |
1199 | } | |
2f77fc4b DG |
1200 | #if 0 |
1201 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1202 | case LTTNG_DOMAIN_UST_PID: | |
1203 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1204 | #endif | |
1205 | default: | |
f73fabfd | 1206 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1207 | goto error; |
1208 | } | |
1209 | ||
f73fabfd | 1210 | ret = LTTNG_OK; |
2f77fc4b DG |
1211 | |
1212 | error: | |
2223c96f | 1213 | rcu_read_unlock(); |
2f77fc4b DG |
1214 | return ret; |
1215 | } | |
1216 | ||
1217 | /* | |
18a720cd | 1218 | * Command LTTNG_DISABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1219 | */ |
18a720cd MD |
1220 | static |
1221 | int disable_kevent_all(struct ltt_session *session, int domain, | |
6e911cad MD |
1222 | char *channel_name, |
1223 | struct lttng_event *event) | |
2f77fc4b DG |
1224 | { |
1225 | int ret; | |
1226 | ||
2223c96f DG |
1227 | rcu_read_lock(); |
1228 | ||
2f77fc4b DG |
1229 | switch (domain) { |
1230 | case LTTNG_DOMAIN_KERNEL: | |
1231 | { | |
1232 | struct ltt_kernel_session *ksess; | |
1233 | struct ltt_kernel_channel *kchan; | |
1234 | ||
1235 | ksess = session->kernel_session; | |
1236 | ||
85076754 MD |
1237 | /* |
1238 | * If a non-default channel has been created in the | |
1239 | * session, explicitely require that -c chan_name needs | |
1240 | * to be provided. | |
1241 | */ | |
1242 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1243 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1244 | goto error; | |
1245 | } | |
1246 | ||
2f77fc4b DG |
1247 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1248 | if (kchan == NULL) { | |
f73fabfd | 1249 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1250 | goto error; |
1251 | } | |
1252 | ||
6e911cad MD |
1253 | switch (event->type) { |
1254 | case LTTNG_EVENT_ALL: | |
1255 | ret = event_kernel_disable_all(kchan); | |
1256 | if (ret != LTTNG_OK) { | |
1257 | goto error; | |
1258 | } | |
1259 | break; | |
1260 | case LTTNG_EVENT_SYSCALL: | |
e2b957af MD |
1261 | ret = event_kernel_disable_syscall(kchan, ""); |
1262 | if (ret != LTTNG_OK) { | |
1263 | goto error; | |
1264 | } | |
6e911cad MD |
1265 | break; |
1266 | default: | |
1267 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1268 | goto error; |
1269 | } | |
1270 | ||
1271 | kernel_wait_quiescent(kernel_tracer_fd); | |
1272 | break; | |
1273 | } | |
2f77fc4b | 1274 | default: |
f73fabfd | 1275 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1276 | goto error; |
1277 | } | |
1278 | ||
f73fabfd | 1279 | ret = LTTNG_OK; |
2f77fc4b DG |
1280 | |
1281 | error: | |
2223c96f | 1282 | rcu_read_unlock(); |
2f77fc4b DG |
1283 | return ret; |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1288 | */ | |
1289 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1290 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1291 | { |
d5979e4a | 1292 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1293 | |
1294 | switch (domain) { | |
1295 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1296 | assert(session->kernel_session); |
1297 | ||
1298 | if (session->kernel_session->channel_count == 0) { | |
1299 | /* Create default channel */ | |
1300 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1301 | if (ret != LTTNG_OK) { | |
1302 | goto error; | |
1303 | } | |
d5979e4a | 1304 | chan_kern_created = 1; |
979e618e | 1305 | } |
2f77fc4b | 1306 | /* Add kernel context to kernel tracer */ |
601d5acf | 1307 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1308 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1309 | goto error; |
1310 | } | |
1311 | break; | |
1312 | case LTTNG_DOMAIN_UST: | |
1313 | { | |
1314 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1315 | unsigned int chan_count; |
1316 | ||
2f77fc4b DG |
1317 | assert(usess); |
1318 | ||
85076754 | 1319 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1320 | if (chan_count == 0) { |
1321 | struct lttng_channel *attr; | |
1322 | /* Create default channel */ | |
0a9c6494 | 1323 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1324 | if (attr == NULL) { |
1325 | ret = LTTNG_ERR_FATAL; | |
1326 | goto error; | |
1327 | } | |
1328 | ||
7972aab2 | 1329 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1330 | if (ret != LTTNG_OK) { |
1331 | free(attr); | |
1332 | goto error; | |
1333 | } | |
1334 | free(attr); | |
d5979e4a | 1335 | chan_ust_created = 1; |
979e618e DG |
1336 | } |
1337 | ||
601d5acf | 1338 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1339 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1340 | goto error; |
1341 | } | |
1342 | break; | |
1343 | } | |
1344 | #if 0 | |
1345 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1346 | case LTTNG_DOMAIN_UST_PID: | |
1347 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1348 | #endif | |
1349 | default: | |
f73fabfd | 1350 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1351 | goto error; |
1352 | } | |
1353 | ||
d5979e4a | 1354 | return LTTNG_OK; |
2f77fc4b DG |
1355 | |
1356 | error: | |
d5979e4a DG |
1357 | if (chan_kern_created) { |
1358 | struct ltt_kernel_channel *kchan = | |
1359 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1360 | session->kernel_session); | |
1361 | /* Created previously, this should NOT fail. */ | |
1362 | assert(kchan); | |
1363 | kernel_destroy_channel(kchan); | |
1364 | } | |
1365 | ||
1366 | if (chan_ust_created) { | |
1367 | struct ltt_ust_channel *uchan = | |
1368 | trace_ust_find_channel_by_name( | |
1369 | session->ust_session->domain_global.channels, | |
1370 | DEFAULT_CHANNEL_NAME); | |
1371 | /* Created previously, this should NOT fail. */ | |
1372 | assert(uchan); | |
1373 | /* Remove from the channel list of the session. */ | |
1374 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1375 | uchan); | |
1376 | trace_ust_destroy_channel(uchan); | |
1377 | } | |
2f77fc4b DG |
1378 | return ret; |
1379 | } | |
1380 | ||
930a2e99 JG |
1381 | static int validate_event_name(const char *name) |
1382 | { | |
1383 | int ret = 0; | |
1384 | const char *c = name; | |
1385 | const char *event_name_end = c + LTTNG_SYMBOL_NAME_LEN; | |
1386 | ||
1387 | /* | |
1388 | * Make sure that unescaped wildcards are only used as the last | |
1389 | * character of the event name. | |
1390 | */ | |
1391 | while (c < event_name_end) { | |
1392 | switch (*c) { | |
1393 | case '\0': | |
1394 | goto end; | |
1395 | case '\\': | |
1396 | c++; | |
1397 | break; | |
1398 | case '*': | |
1399 | if ((c + 1) < event_name_end && *(c + 1)) { | |
1400 | /* Wildcard is not the last character */ | |
1401 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1402 | goto end; | |
1403 | } | |
1404 | default: | |
1405 | break; | |
1406 | } | |
1407 | c++; | |
1408 | } | |
1409 | end: | |
1410 | return ret; | |
1411 | } | |
1412 | ||
2f77fc4b DG |
1413 | /* |
1414 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
faa9eb17 | 1415 | * We own filter, exclusion, and filter_expression. |
2f77fc4b | 1416 | */ |
7972aab2 | 1417 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 | 1418 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1419 | char *filter_expression, |
db8f1377 JI |
1420 | struct lttng_filter_bytecode *filter, |
1421 | struct lttng_event_exclusion *exclusion, | |
1422 | int wpipe) | |
2f77fc4b | 1423 | { |
e5f5db7f | 1424 | int ret, channel_created = 0; |
2f77fc4b DG |
1425 | struct lttng_channel *attr; |
1426 | ||
1427 | assert(session); | |
1428 | assert(event); | |
1429 | assert(channel_name); | |
1430 | ||
18a720cd MD |
1431 | DBG("Enable event command for event \'%s\'", event->name); |
1432 | ||
1433 | /* Special handling for kernel domain all events. */ | |
1434 | if (domain->type == LTTNG_DOMAIN_KERNEL && !strcmp(event->name, "*")) { | |
1435 | return enable_kevent_all(session, domain, channel_name, event, | |
1436 | filter_expression, filter, wpipe); | |
1437 | } | |
1438 | ||
930a2e99 JG |
1439 | ret = validate_event_name(event->name); |
1440 | if (ret) { | |
1441 | goto error; | |
1442 | } | |
1443 | ||
2223c96f DG |
1444 | rcu_read_lock(); |
1445 | ||
7972aab2 | 1446 | switch (domain->type) { |
2f77fc4b DG |
1447 | case LTTNG_DOMAIN_KERNEL: |
1448 | { | |
1449 | struct ltt_kernel_channel *kchan; | |
1450 | ||
85076754 MD |
1451 | /* |
1452 | * If a non-default channel has been created in the | |
1453 | * session, explicitely require that -c chan_name needs | |
1454 | * to be provided. | |
1455 | */ | |
1456 | if (session->kernel_session->has_non_default_channel | |
1457 | && channel_name[0] == '\0') { | |
1458 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1459 | goto error; | |
1460 | } | |
1461 | ||
2f77fc4b DG |
1462 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1463 | session->kernel_session); | |
1464 | if (kchan == NULL) { | |
0a9c6494 DG |
1465 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1466 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1467 | if (attr == NULL) { |
f73fabfd | 1468 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1469 | goto error; |
1470 | } | |
d092c2f0 MD |
1471 | if (lttng_strncpy(attr->name, channel_name, |
1472 | sizeof(attr->name))) { | |
1473 | ret = LTTNG_ERR_INVALID; | |
1474 | free(attr); | |
1475 | goto error; | |
1476 | } | |
2f77fc4b DG |
1477 | |
1478 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1479 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1480 | free(attr); |
1481 | goto error; | |
1482 | } | |
1483 | free(attr); | |
e5f5db7f DG |
1484 | |
1485 | channel_created = 1; | |
2f77fc4b DG |
1486 | } |
1487 | ||
1488 | /* Get the newly created kernel channel pointer */ | |
1489 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1490 | session->kernel_session); | |
1491 | if (kchan == NULL) { | |
1492 | /* This sould not happen... */ | |
f73fabfd | 1493 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1494 | goto error; |
1495 | } | |
1496 | ||
6e911cad MD |
1497 | switch (event->type) { |
1498 | case LTTNG_EVENT_ALL: | |
6e6ef3d7 DG |
1499 | case LTTNG_EVENT_PROBE: |
1500 | case LTTNG_EVENT_FUNCTION: | |
1501 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad MD |
1502 | case LTTNG_EVENT_TRACEPOINT: |
1503 | ret = event_kernel_enable_tracepoint(kchan, event); | |
1504 | if (ret != LTTNG_OK) { | |
1505 | if (channel_created) { | |
1506 | /* Let's not leak a useless channel. */ | |
1507 | kernel_destroy_channel(kchan); | |
1508 | } | |
1509 | goto error; | |
e5f5db7f | 1510 | } |
6e911cad MD |
1511 | break; |
1512 | case LTTNG_EVENT_SYSCALL: | |
1513 | ret = event_kernel_enable_syscall(kchan, event->name); | |
e2b957af MD |
1514 | if (ret != LTTNG_OK) { |
1515 | goto error; | |
1516 | } | |
6e911cad MD |
1517 | break; |
1518 | default: | |
1519 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1520 | goto error; |
1521 | } | |
1522 | ||
1523 | kernel_wait_quiescent(kernel_tracer_fd); | |
1524 | break; | |
1525 | } | |
1526 | case LTTNG_DOMAIN_UST: | |
1527 | { | |
1528 | struct ltt_ust_channel *uchan; | |
1529 | struct ltt_ust_session *usess = session->ust_session; | |
1530 | ||
1531 | assert(usess); | |
1532 | ||
85076754 MD |
1533 | /* |
1534 | * If a non-default channel has been created in the | |
1535 | * session, explicitely require that -c chan_name needs | |
1536 | * to be provided. | |
1537 | */ | |
1538 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1539 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1540 | goto error; | |
1541 | } | |
1542 | ||
2f77fc4b DG |
1543 | /* Get channel from global UST domain */ |
1544 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1545 | channel_name); | |
1546 | if (uchan == NULL) { | |
1547 | /* Create default channel */ | |
0a9c6494 DG |
1548 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1549 | usess->buffer_type); | |
2f77fc4b | 1550 | if (attr == NULL) { |
f73fabfd | 1551 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1552 | goto error; |
1553 | } | |
d092c2f0 MD |
1554 | if (lttng_strncpy(attr->name, channel_name, |
1555 | sizeof(attr->name))) { | |
1556 | ret = LTTNG_ERR_INVALID; | |
1557 | free(attr); | |
1558 | goto error; | |
1559 | } | |
2f77fc4b DG |
1560 | |
1561 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1562 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1563 | free(attr); |
1564 | goto error; | |
1565 | } | |
1566 | free(attr); | |
1567 | ||
1568 | /* Get the newly created channel reference back */ | |
1569 | uchan = trace_ust_find_channel_by_name( | |
1570 | usess->domain_global.channels, channel_name); | |
1571 | assert(uchan); | |
1572 | } | |
1573 | ||
1574 | /* At this point, the session and channel exist on the tracer */ | |
6b453b5e JG |
1575 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
1576 | filter_expression, filter, exclusion); | |
faa9eb17 MD |
1577 | /* We have passed ownership */ |
1578 | filter_expression = NULL; | |
1579 | filter = NULL; | |
1580 | exclusion = NULL; | |
f73fabfd | 1581 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1582 | goto error; |
1583 | } | |
1584 | break; | |
1585 | } | |
5cdb6027 | 1586 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1587 | case LTTNG_DOMAIN_JUL: |
1588 | { | |
da6c3a50 | 1589 | const char *default_event_name, *default_chan_name; |
fefd409b | 1590 | struct agent *agt; |
f20baf8e DG |
1591 | struct lttng_event uevent; |
1592 | struct lttng_domain tmp_dom; | |
1593 | struct ltt_ust_session *usess = session->ust_session; | |
1594 | ||
1595 | assert(usess); | |
1596 | ||
5cdb6027 | 1597 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 1598 | if (!agt) { |
5cdb6027 | 1599 | agt = agent_create(domain->type); |
fefd409b | 1600 | if (!agt) { |
2198c1e1 | 1601 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
1602 | goto error; |
1603 | } | |
1604 | agent_add(agt, usess->agents); | |
1605 | } | |
1606 | ||
022d91ba | 1607 | /* Create the default tracepoint. */ |
996de3c7 | 1608 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
1609 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1610 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
da6c3a50 DG |
1611 | default_event_name = event_get_default_agent_ust_name(domain->type); |
1612 | if (!default_event_name) { | |
2198c1e1 | 1613 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 1614 | goto error; |
f43f95a9 | 1615 | } |
da6c3a50 | 1616 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
1617 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1618 | ||
1619 | /* | |
1620 | * The domain type is changed because we are about to enable the | |
1621 | * default channel and event for the JUL domain that are hardcoded. | |
1622 | * This happens in the UST domain. | |
1623 | */ | |
1624 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1625 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1626 | ||
da6c3a50 DG |
1627 | if (domain->type == LTTNG_DOMAIN_LOG4J) { |
1628 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
1629 | } else { | |
1630 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; | |
1631 | } | |
1632 | ||
0f9981d0 JG |
1633 | { |
1634 | struct lttng_filter_bytecode *filter_copy = NULL; | |
8a1032bc | 1635 | char *filter_expression_copy = NULL; |
0f9981d0 JG |
1636 | |
1637 | if (filter) { | |
1638 | filter_copy = zmalloc( | |
1639 | sizeof(struct lttng_filter_bytecode) | |
1640 | + filter->len); | |
1641 | if (!filter_copy) { | |
42eefbd6 | 1642 | ret = LTTNG_ERR_NOMEM; |
0f9981d0 JG |
1643 | goto error; |
1644 | } | |
1645 | ||
1646 | memcpy(filter_copy, filter, | |
8a1032bc JG |
1647 | sizeof(struct lttng_filter_bytecode) |
1648 | + filter->len); | |
1649 | } | |
1650 | ||
1651 | if (filter_expression) { | |
1652 | filter_expression_copy = | |
1653 | strdup(filter_expression); | |
1654 | if (!filter_expression) { | |
1655 | ret = LTTNG_ERR_NOMEM; | |
1656 | goto error_free_copy; | |
1657 | } | |
0f9981d0 JG |
1658 | } |
1659 | ||
1660 | ret = cmd_enable_event(session, &tmp_dom, | |
1661 | (char *) default_chan_name, | |
8a1032bc JG |
1662 | &uevent, filter_expression_copy, |
1663 | filter_copy, NULL, wpipe); | |
1664 | filter_copy = NULL; | |
1665 | filter_expression_copy = NULL; | |
1666 | error_free_copy: | |
1667 | free(filter_copy); | |
1668 | free(filter_expression_copy); | |
0f9981d0 JG |
1669 | } |
1670 | ||
f20baf8e DG |
1671 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1672 | goto error; | |
1673 | } | |
1674 | ||
1675 | /* The wild card * means that everything should be enabled. */ | |
1676 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8a1032bc JG |
1677 | ret = event_agent_enable_all(usess, agt, event, filter, |
1678 | filter_expression); | |
0f9981d0 | 1679 | filter = NULL; |
f20baf8e | 1680 | } else { |
8a1032bc JG |
1681 | ret = event_agent_enable(usess, agt, event, filter, |
1682 | filter_expression); | |
0f9981d0 | 1683 | filter = NULL; |
f20baf8e DG |
1684 | } |
1685 | if (ret != LTTNG_OK) { | |
1686 | goto error; | |
1687 | } | |
1688 | ||
1689 | break; | |
1690 | } | |
2f77fc4b DG |
1691 | #if 0 |
1692 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1693 | case LTTNG_DOMAIN_UST_PID: | |
1694 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1695 | #endif | |
1696 | default: | |
f73fabfd | 1697 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1698 | goto error; |
1699 | } | |
1700 | ||
f73fabfd | 1701 | ret = LTTNG_OK; |
2f77fc4b DG |
1702 | |
1703 | error: | |
faa9eb17 MD |
1704 | free(filter_expression); |
1705 | free(filter); | |
1706 | free(exclusion); | |
2223c96f | 1707 | rcu_read_unlock(); |
2f77fc4b DG |
1708 | return ret; |
1709 | } | |
1710 | ||
1711 | /* | |
18a720cd | 1712 | * Command LTTNG_ENABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1713 | */ |
18a720cd MD |
1714 | static |
1715 | int enable_kevent_all(struct ltt_session *session, | |
1716 | struct lttng_domain *domain, char *channel_name, | |
1717 | struct lttng_event *event, | |
6b453b5e | 1718 | char *filter_expression, |
025faf73 | 1719 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1720 | { |
1721 | int ret; | |
1722 | struct lttng_channel *attr; | |
1723 | ||
1724 | assert(session); | |
1725 | assert(channel_name); | |
1726 | ||
2223c96f DG |
1727 | rcu_read_lock(); |
1728 | ||
7972aab2 | 1729 | switch (domain->type) { |
2f77fc4b DG |
1730 | case LTTNG_DOMAIN_KERNEL: |
1731 | { | |
1732 | struct ltt_kernel_channel *kchan; | |
1733 | ||
1734 | assert(session->kernel_session); | |
1735 | ||
85076754 MD |
1736 | /* |
1737 | * If a non-default channel has been created in the | |
1738 | * session, explicitely require that -c chan_name needs | |
1739 | * to be provided. | |
1740 | */ | |
1741 | if (session->kernel_session->has_non_default_channel | |
1742 | && channel_name[0] == '\0') { | |
1743 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1744 | goto error; | |
1745 | } | |
1746 | ||
2f77fc4b DG |
1747 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1748 | session->kernel_session); | |
1749 | if (kchan == NULL) { | |
1750 | /* Create default channel */ | |
0a9c6494 DG |
1751 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1752 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1753 | if (attr == NULL) { |
f73fabfd | 1754 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1755 | goto error; |
1756 | } | |
1757 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1758 | ||
1759 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1760 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1761 | free(attr); |
1762 | goto error; | |
1763 | } | |
1764 | free(attr); | |
1765 | ||
1766 | /* Get the newly created kernel channel pointer */ | |
1767 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1768 | session->kernel_session); | |
1769 | assert(kchan); | |
1770 | } | |
1771 | ||
18a720cd | 1772 | switch (event->type) { |
2f77fc4b | 1773 | case LTTNG_EVENT_SYSCALL: |
6e911cad | 1774 | ret = event_kernel_enable_syscall(kchan, ""); |
e2b957af MD |
1775 | if (ret != LTTNG_OK) { |
1776 | goto error; | |
1777 | } | |
2f77fc4b DG |
1778 | break; |
1779 | case LTTNG_EVENT_TRACEPOINT: | |
1780 | /* | |
1781 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1782 | * events already registered to the channel. | |
1783 | */ | |
d3a56674 | 1784 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1785 | break; |
1786 | case LTTNG_EVENT_ALL: | |
1787 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1788 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1789 | break; |
1790 | default: | |
f73fabfd | 1791 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1792 | goto error; |
1793 | } | |
1794 | ||
1795 | /* Manage return value */ | |
f73fabfd | 1796 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1797 | /* |
1798 | * On error, cmd_enable_channel call will take care of destroying | |
1799 | * the created channel if it was needed. | |
1800 | */ | |
2f77fc4b DG |
1801 | goto error; |
1802 | } | |
1803 | ||
1804 | kernel_wait_quiescent(kernel_tracer_fd); | |
1805 | break; | |
1806 | } | |
2f77fc4b | 1807 | default: |
f73fabfd | 1808 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1809 | goto error; |
1810 | } | |
1811 | ||
f73fabfd | 1812 | ret = LTTNG_OK; |
2f77fc4b DG |
1813 | |
1814 | error: | |
2223c96f | 1815 | rcu_read_unlock(); |
2f77fc4b DG |
1816 | return ret; |
1817 | } | |
1818 | ||
1819 | ||
1820 | /* | |
1821 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1822 | */ | |
1823 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1824 | { | |
1825 | int ret; | |
1826 | ssize_t nb_events = 0; | |
1827 | ||
1828 | switch (domain) { | |
1829 | case LTTNG_DOMAIN_KERNEL: | |
1830 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1831 | if (nb_events < 0) { | |
f73fabfd | 1832 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1833 | goto error; |
1834 | } | |
1835 | break; | |
1836 | case LTTNG_DOMAIN_UST: | |
1837 | nb_events = ust_app_list_events(events); | |
1838 | if (nb_events < 0) { | |
f73fabfd | 1839 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1840 | goto error; |
1841 | } | |
1842 | break; | |
5cdb6027 | 1843 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 1844 | case LTTNG_DOMAIN_JUL: |
f60140a1 | 1845 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
1846 | if (nb_events < 0) { |
1847 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1848 | goto error; | |
1849 | } | |
1850 | break; | |
2f77fc4b | 1851 | default: |
f73fabfd | 1852 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1853 | goto error; |
1854 | } | |
1855 | ||
1856 | return nb_events; | |
1857 | ||
1858 | error: | |
1859 | /* Return negative value to differentiate return code */ | |
1860 | return -ret; | |
1861 | } | |
1862 | ||
1863 | /* | |
1864 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1865 | */ | |
1866 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1867 | struct lttng_event_field **fields) | |
1868 | { | |
1869 | int ret; | |
1870 | ssize_t nb_fields = 0; | |
1871 | ||
1872 | switch (domain) { | |
1873 | case LTTNG_DOMAIN_UST: | |
1874 | nb_fields = ust_app_list_event_fields(fields); | |
1875 | if (nb_fields < 0) { | |
f73fabfd | 1876 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1877 | goto error; |
1878 | } | |
1879 | break; | |
1880 | case LTTNG_DOMAIN_KERNEL: | |
1881 | default: /* fall-through */ | |
f73fabfd | 1882 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1883 | goto error; |
1884 | } | |
1885 | ||
1886 | return nb_fields; | |
1887 | ||
1888 | error: | |
1889 | /* Return negative value to differentiate return code */ | |
1890 | return -ret; | |
1891 | } | |
1892 | ||
834978fd DG |
1893 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
1894 | { | |
1895 | return syscall_table_list(events); | |
1896 | } | |
1897 | ||
2f77fc4b DG |
1898 | /* |
1899 | * Command LTTNG_START_TRACE processed by the client thread. | |
1900 | */ | |
1901 | int cmd_start_trace(struct ltt_session *session) | |
1902 | { | |
1903 | int ret; | |
cde3e505 | 1904 | unsigned long nb_chan = 0; |
2f77fc4b DG |
1905 | struct ltt_kernel_session *ksession; |
1906 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1907 | |
1908 | assert(session); | |
1909 | ||
1910 | /* Ease our life a bit ;) */ | |
1911 | ksession = session->kernel_session; | |
1912 | usess = session->ust_session; | |
1913 | ||
8382cf6f DG |
1914 | /* Is the session already started? */ |
1915 | if (session->active) { | |
f73fabfd | 1916 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1917 | goto error; |
1918 | } | |
1919 | ||
cde3e505 DG |
1920 | /* |
1921 | * Starting a session without channel is useless since after that it's not | |
1922 | * possible to enable channel thus inform the client. | |
1923 | */ | |
1924 | if (usess && usess->domain_global.channels) { | |
492a6634 | 1925 | rcu_read_lock(); |
cde3e505 | 1926 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); |
492a6634 | 1927 | rcu_read_unlock(); |
cde3e505 DG |
1928 | } |
1929 | if (ksession) { | |
1930 | nb_chan += ksession->channel_count; | |
1931 | } | |
1932 | if (!nb_chan) { | |
1933 | ret = LTTNG_ERR_NO_CHANNEL; | |
1934 | goto error; | |
1935 | } | |
1936 | ||
2f77fc4b DG |
1937 | /* Kernel tracing */ |
1938 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1939 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1940 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1941 | goto error; |
1942 | } | |
2f77fc4b DG |
1943 | } |
1944 | ||
1945 | /* Flag session that trace should start automatically */ | |
1946 | if (usess) { | |
14fb1ebe DG |
1947 | /* |
1948 | * Even though the start trace might fail, flag this session active so | |
1949 | * other application coming in are started by default. | |
1950 | */ | |
1951 | usess->active = 1; | |
2f77fc4b DG |
1952 | |
1953 | ret = ust_app_start_trace_all(usess); | |
1954 | if (ret < 0) { | |
f73fabfd | 1955 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1956 | goto error; |
1957 | } | |
1958 | } | |
1959 | ||
8382cf6f DG |
1960 | /* Flag this after a successful start. */ |
1961 | session->has_been_started = 1; | |
1962 | session->active = 1; | |
9b6c7ec5 | 1963 | |
f73fabfd | 1964 | ret = LTTNG_OK; |
2f77fc4b DG |
1965 | |
1966 | error: | |
1967 | return ret; | |
1968 | } | |
1969 | ||
1970 | /* | |
1971 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1972 | */ | |
1973 | int cmd_stop_trace(struct ltt_session *session) | |
1974 | { | |
1975 | int ret; | |
1976 | struct ltt_kernel_channel *kchan; | |
1977 | struct ltt_kernel_session *ksession; | |
1978 | struct ltt_ust_session *usess; | |
1979 | ||
1980 | assert(session); | |
1981 | ||
1982 | /* Short cut */ | |
1983 | ksession = session->kernel_session; | |
1984 | usess = session->ust_session; | |
1985 | ||
8382cf6f DG |
1986 | /* Session is not active. Skip everythong and inform the client. */ |
1987 | if (!session->active) { | |
f73fabfd | 1988 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1989 | goto error; |
1990 | } | |
1991 | ||
2f77fc4b | 1992 | /* Kernel tracer */ |
14fb1ebe | 1993 | if (ksession && ksession->active) { |
2f77fc4b DG |
1994 | DBG("Stop kernel tracing"); |
1995 | ||
5266dbf6 MD |
1996 | ret = kernel_stop_session(ksession); |
1997 | if (ret < 0) { | |
1998 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1999 | goto error; | |
2000 | } | |
2001 | ||
2002 | kernel_wait_quiescent(kernel_tracer_fd); | |
2003 | ||
2004 | /* Flush metadata after stopping (if exists) */ | |
2f77fc4b DG |
2005 | if (ksession->metadata_stream_fd >= 0) { |
2006 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2007 | if (ret < 0) { | |
2008 | ERR("Kernel metadata flush failed"); | |
2009 | } | |
2010 | } | |
2011 | ||
5266dbf6 | 2012 | /* Flush all buffers after stopping */ |
2f77fc4b DG |
2013 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2014 | ret = kernel_flush_buffer(kchan); | |
2015 | if (ret < 0) { | |
2016 | ERR("Kernel flush buffer error"); | |
2017 | } | |
2018 | } | |
2019 | ||
14fb1ebe | 2020 | ksession->active = 0; |
2f77fc4b DG |
2021 | } |
2022 | ||
14fb1ebe DG |
2023 | if (usess && usess->active) { |
2024 | /* | |
2025 | * Even though the stop trace might fail, flag this session inactive so | |
2026 | * other application coming in are not started by default. | |
2027 | */ | |
2028 | usess->active = 0; | |
2f77fc4b DG |
2029 | |
2030 | ret = ust_app_stop_trace_all(usess); | |
2031 | if (ret < 0) { | |
f73fabfd | 2032 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2033 | goto error; |
2034 | } | |
2035 | } | |
2036 | ||
8382cf6f DG |
2037 | /* Flag inactive after a successful stop. */ |
2038 | session->active = 0; | |
f73fabfd | 2039 | ret = LTTNG_OK; |
2f77fc4b DG |
2040 | |
2041 | error: | |
2042 | return ret; | |
2043 | } | |
2044 | ||
2045 | /* | |
2046 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2047 | */ | |
9863d1c8 JG |
2048 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, |
2049 | struct lttng_uri *uris) | |
2f77fc4b DG |
2050 | { |
2051 | int ret, i; | |
2052 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2053 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
2054 | |
2055 | assert(session); | |
2056 | assert(uris); | |
2057 | assert(nb_uri > 0); | |
2058 | ||
8382cf6f DG |
2059 | /* Can't set consumer URI if the session is active. */ |
2060 | if (session->active) { | |
f73fabfd | 2061 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2062 | goto error; |
2063 | } | |
2064 | ||
9863d1c8 | 2065 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2066 | for (i = 0; i < nb_uri; i++) { |
9863d1c8 JG |
2067 | ret = add_uri_to_consumer(session->consumer, |
2068 | &uris[i], 0, session->name); | |
a74934ba | 2069 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2070 | goto error; |
2071 | } | |
2f77fc4b DG |
2072 | } |
2073 | ||
9863d1c8 JG |
2074 | /* Set UST session URIs */ |
2075 | if (session->ust_session) { | |
2076 | for (i = 0; i < nb_uri; i++) { | |
2077 | ret = add_uri_to_consumer( | |
2078 | session->ust_session->consumer, | |
2079 | &uris[i], LTTNG_DOMAIN_UST, | |
2080 | session->name); | |
2081 | if (ret != LTTNG_OK) { | |
2082 | goto error; | |
2083 | } | |
2084 | } | |
2085 | } | |
2086 | ||
2087 | /* Set kernel session URIs */ | |
2088 | if (session->kernel_session) { | |
2089 | for (i = 0; i < nb_uri; i++) { | |
2090 | ret = add_uri_to_consumer( | |
2091 | session->kernel_session->consumer, | |
2092 | &uris[i], LTTNG_DOMAIN_KERNEL, | |
2093 | session->name); | |
2094 | if (ret != LTTNG_OK) { | |
2095 | goto error; | |
2096 | } | |
2097 | } | |
2098 | } | |
2099 | ||
7ab70fe0 DG |
2100 | /* |
2101 | * Make sure to set the session in output mode after we set URI since a | |
2102 | * session can be created without URL (thus flagged in no output mode). | |
2103 | */ | |
2104 | session->output_traces = 1; | |
2105 | if (ksess) { | |
2106 | ksess->output_traces = 1; | |
9863d1c8 JG |
2107 | } |
2108 | ||
2109 | if (usess) { | |
7ab70fe0 DG |
2110 | usess->output_traces = 1; |
2111 | } | |
2112 | ||
2f77fc4b | 2113 | /* All good! */ |
f73fabfd | 2114 | ret = LTTNG_OK; |
2f77fc4b DG |
2115 | |
2116 | error: | |
2117 | return ret; | |
2118 | } | |
2119 | ||
2120 | /* | |
2121 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2122 | */ | |
2123 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2124 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2125 | { |
2126 | int ret; | |
2f77fc4b DG |
2127 | struct ltt_session *session; |
2128 | ||
2129 | assert(name); | |
2bba9e53 | 2130 | assert(creds); |
785d2d0d | 2131 | |
2f77fc4b DG |
2132 | /* |
2133 | * Verify if the session already exist | |
2134 | * | |
2135 | * XXX: There is no need for the session lock list here since the caller | |
2136 | * (process_client_msg) is holding it. We might want to change that so a | |
2137 | * single command does not lock the entire session list. | |
2138 | */ | |
2139 | session = session_find_by_name(name); | |
2140 | if (session != NULL) { | |
f73fabfd | 2141 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2142 | goto find_error; |
2143 | } | |
2144 | ||
2145 | /* Create tracing session in the registry */ | |
dec56f6c | 2146 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2147 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2148 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2149 | goto session_error; |
2150 | } | |
2151 | ||
2152 | /* | |
2153 | * Get the newly created session pointer back | |
2154 | * | |
2155 | * XXX: There is no need for the session lock list here since the caller | |
2156 | * (process_client_msg) is holding it. We might want to change that so a | |
2157 | * single command does not lock the entire session list. | |
2158 | */ | |
2159 | session = session_find_by_name(name); | |
2160 | assert(session); | |
2161 | ||
ecc48a90 | 2162 | session->live_timer = live_timer; |
2f77fc4b DG |
2163 | /* Create default consumer output for the session not yet created. */ |
2164 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2165 | if (session->consumer == NULL) { | |
f73fabfd | 2166 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2167 | goto consumer_error; |
2168 | } | |
2169 | ||
2bba9e53 | 2170 | if (uris) { |
9863d1c8 | 2171 | ret = cmd_set_consumer_uri(session, nb_uri, uris); |
2bba9e53 DG |
2172 | if (ret != LTTNG_OK) { |
2173 | goto consumer_error; | |
2174 | } | |
2175 | session->output_traces = 1; | |
2176 | } else { | |
2177 | session->output_traces = 0; | |
2178 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2179 | } |
2180 | ||
2181 | session->consumer->enabled = 1; | |
2182 | ||
f73fabfd | 2183 | return LTTNG_OK; |
2f77fc4b DG |
2184 | |
2185 | consumer_error: | |
2186 | session_destroy(session); | |
2187 | session_error: | |
2188 | find_error: | |
2189 | return ret; | |
2190 | } | |
2191 | ||
27babd3a DG |
2192 | /* |
2193 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2194 | */ | |
2195 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2196 | size_t nb_uri, lttng_sock_cred *creds) | |
2197 | { | |
2198 | int ret; | |
2199 | struct ltt_session *session; | |
2200 | struct snapshot_output *new_output = NULL; | |
2201 | ||
2202 | assert(name); | |
2203 | assert(creds); | |
2204 | ||
2205 | /* | |
2206 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2207 | * received are for a default snapshot output if one. | |
2208 | */ | |
ab014ba2 | 2209 | ret = cmd_create_session_uri(name, NULL, 0, creds, 0); |
27babd3a DG |
2210 | if (ret != LTTNG_OK) { |
2211 | goto error; | |
2212 | } | |
2213 | ||
2214 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2215 | session = session_find_by_name(name); | |
2216 | assert(session); | |
2217 | ||
2218 | /* Flag session for snapshot mode. */ | |
2219 | session->snapshot_mode = 1; | |
2220 | ||
2221 | /* Skip snapshot output creation if no URI is given. */ | |
2222 | if (nb_uri == 0) { | |
2223 | goto end; | |
2224 | } | |
2225 | ||
2226 | new_output = snapshot_output_alloc(); | |
2227 | if (!new_output) { | |
2228 | ret = LTTNG_ERR_NOMEM; | |
2229 | goto error_snapshot_alloc; | |
2230 | } | |
2231 | ||
2232 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2233 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2234 | if (ret < 0) { | |
2235 | if (ret == -ENOMEM) { | |
2236 | ret = LTTNG_ERR_NOMEM; | |
2237 | } else { | |
2238 | ret = LTTNG_ERR_INVALID; | |
2239 | } | |
2240 | goto error_snapshot; | |
2241 | } | |
2242 | ||
2243 | rcu_read_lock(); | |
2244 | snapshot_add_output(&session->snapshot, new_output); | |
2245 | rcu_read_unlock(); | |
2246 | ||
2247 | end: | |
2248 | return LTTNG_OK; | |
2249 | ||
2250 | error_snapshot: | |
2251 | snapshot_output_destroy(new_output); | |
2252 | error_snapshot_alloc: | |
2253 | session_destroy(session); | |
2254 | error: | |
2255 | return ret; | |
2256 | } | |
2257 | ||
2f77fc4b DG |
2258 | /* |
2259 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2260 | */ | |
2261 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2262 | { | |
2263 | int ret; | |
2264 | struct ltt_ust_session *usess; | |
2265 | struct ltt_kernel_session *ksess; | |
2266 | ||
2267 | /* Safety net */ | |
2268 | assert(session); | |
2269 | ||
2270 | usess = session->ust_session; | |
2271 | ksess = session->kernel_session; | |
2272 | ||
2273 | /* Clean kernel session teardown */ | |
2274 | kernel_destroy_session(ksess); | |
2275 | ||
2276 | /* UST session teardown */ | |
2277 | if (usess) { | |
2278 | /* Close any relayd session */ | |
2279 | consumer_output_send_destroy_relayd(usess->consumer); | |
2280 | ||
2281 | /* Destroy every UST application related to this session. */ | |
2282 | ret = ust_app_destroy_trace_all(usess); | |
2283 | if (ret) { | |
2284 | ERR("Error in ust_app_destroy_trace_all"); | |
2285 | } | |
2286 | ||
2287 | /* Clean up the rest. */ | |
2288 | trace_ust_destroy_session(usess); | |
2289 | } | |
2290 | ||
2291 | /* | |
2292 | * Must notify the kernel thread here to update it's poll set in order to | |
2293 | * remove the channel(s)' fd just destroyed. | |
2294 | */ | |
2295 | ret = notify_thread_pipe(wpipe); | |
2296 | if (ret < 0) { | |
2297 | PERROR("write kernel poll pipe"); | |
2298 | } | |
2299 | ||
2300 | ret = session_destroy(session); | |
2301 | ||
2302 | return ret; | |
2303 | } | |
2304 | ||
2305 | /* | |
2306 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2307 | */ | |
2308 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2309 | { | |
2310 | int ret; | |
2311 | ||
2312 | switch (domain) { | |
2313 | case LTTNG_DOMAIN_KERNEL: | |
2314 | { | |
2315 | struct lttng_kernel_calibrate kcalibrate; | |
2316 | ||
2e84128e DG |
2317 | switch (calibrate->type) { |
2318 | case LTTNG_CALIBRATE_FUNCTION: | |
2319 | default: | |
2320 | /* Default and only possible calibrate option. */ | |
2321 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2322 | break; | |
2323 | } | |
2324 | ||
2f77fc4b DG |
2325 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2326 | if (ret < 0) { | |
f73fabfd | 2327 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2328 | goto error; |
2329 | } | |
2330 | break; | |
2331 | } | |
2332 | case LTTNG_DOMAIN_UST: | |
2333 | { | |
2334 | struct lttng_ust_calibrate ucalibrate; | |
2335 | ||
2e84128e DG |
2336 | switch (calibrate->type) { |
2337 | case LTTNG_CALIBRATE_FUNCTION: | |
2338 | default: | |
2339 | /* Default and only possible calibrate option. */ | |
2340 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2341 | break; | |
2342 | } | |
2343 | ||
2f77fc4b DG |
2344 | ret = ust_app_calibrate_glb(&ucalibrate); |
2345 | if (ret < 0) { | |
f73fabfd | 2346 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2347 | goto error; |
2348 | } | |
2349 | break; | |
2350 | } | |
2351 | default: | |
f73fabfd | 2352 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2353 | goto error; |
2354 | } | |
2355 | ||
f73fabfd | 2356 | ret = LTTNG_OK; |
2f77fc4b DG |
2357 | |
2358 | error: | |
2359 | return ret; | |
2360 | } | |
2361 | ||
2362 | /* | |
2363 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2364 | */ | |
2365 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2366 | const char *sock_path, struct consumer_data *cdata) | |
2367 | { | |
2368 | int ret, sock; | |
dd81b457 | 2369 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2370 | |
2371 | assert(session); | |
2372 | assert(cdata); | |
2373 | assert(sock_path); | |
2374 | ||
2375 | switch (domain) { | |
2376 | case LTTNG_DOMAIN_KERNEL: | |
2377 | { | |
2378 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2379 | ||
2380 | assert(ksess); | |
2381 | ||
2382 | /* Can't register a consumer if there is already one */ | |
2383 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2384 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2385 | goto error; |
2386 | } | |
2387 | ||
2388 | sock = lttcomm_connect_unix_sock(sock_path); | |
2389 | if (sock < 0) { | |
f73fabfd | 2390 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2391 | goto error; |
2392 | } | |
4ce514c4 | 2393 | cdata->cmd_sock = sock; |
2f77fc4b | 2394 | |
4ce514c4 | 2395 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2396 | if (socket == NULL) { |
f66c074c DG |
2397 | ret = close(sock); |
2398 | if (ret < 0) { | |
2399 | PERROR("close register consumer"); | |
2400 | } | |
4ce514c4 | 2401 | cdata->cmd_sock = -1; |
f73fabfd | 2402 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2403 | goto error; |
2404 | } | |
2405 | ||
2406 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2407 | if (socket->lock == NULL) { | |
2408 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2409 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2410 | goto error; |
2411 | } | |
2412 | pthread_mutex_init(socket->lock, NULL); | |
2413 | socket->registered = 1; | |
2414 | ||
2415 | rcu_read_lock(); | |
2416 | consumer_add_socket(socket, ksess->consumer); | |
2417 | rcu_read_unlock(); | |
2418 | ||
2419 | pthread_mutex_lock(&cdata->pid_mutex); | |
2420 | cdata->pid = -1; | |
2421 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2422 | ||
2423 | break; | |
2424 | } | |
2425 | default: | |
2426 | /* TODO: Userspace tracing */ | |
f73fabfd | 2427 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2428 | goto error; |
2429 | } | |
2430 | ||
dd81b457 | 2431 | return LTTNG_OK; |
2f77fc4b DG |
2432 | |
2433 | error: | |
dd81b457 DG |
2434 | if (socket) { |
2435 | consumer_destroy_socket(socket); | |
2436 | } | |
2f77fc4b DG |
2437 | return ret; |
2438 | } | |
2439 | ||
2440 | /* | |
2441 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2442 | */ | |
2443 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2444 | struct lttng_domain **domains) | |
2445 | { | |
2446 | int ret, index = 0; | |
2447 | ssize_t nb_dom = 0; | |
fefd409b DG |
2448 | struct agent *agt; |
2449 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2450 | |
2451 | if (session->kernel_session != NULL) { | |
2452 | DBG3("Listing domains found kernel domain"); | |
2453 | nb_dom++; | |
2454 | } | |
2455 | ||
2456 | if (session->ust_session != NULL) { | |
2457 | DBG3("Listing domains found UST global domain"); | |
2458 | nb_dom++; | |
3c6a091f | 2459 | |
f376cc6a | 2460 | rcu_read_lock(); |
fefd409b DG |
2461 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2462 | agt, node.node) { | |
2463 | if (agt->being_used) { | |
2464 | nb_dom++; | |
2465 | } | |
3c6a091f | 2466 | } |
f376cc6a | 2467 | rcu_read_unlock(); |
2f77fc4b DG |
2468 | } |
2469 | ||
2470 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
2471 | if (*domains == NULL) { | |
f73fabfd | 2472 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2473 | goto error; |
2474 | } | |
2475 | ||
2476 | if (session->kernel_session != NULL) { | |
2477 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
9f6daa3d PP |
2478 | |
2479 | /* Kernel session buffer type is always GLOBAL */ | |
2480 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
2481 | ||
2f77fc4b DG |
2482 | index++; |
2483 | } | |
2484 | ||
2485 | if (session->ust_session != NULL) { | |
2486 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2487 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2488 | index++; |
3c6a091f | 2489 | |
f376cc6a | 2490 | rcu_read_lock(); |
fefd409b DG |
2491 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2492 | agt, node.node) { | |
2493 | if (agt->being_used) { | |
2494 | (*domains)[index].type = agt->domain; | |
2495 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2496 | index++; | |
2497 | } | |
3c6a091f | 2498 | } |
f376cc6a | 2499 | rcu_read_unlock(); |
2f77fc4b DG |
2500 | } |
2501 | ||
2502 | return nb_dom; | |
2503 | ||
2504 | error: | |
f73fabfd DG |
2505 | /* Return negative value to differentiate return code */ |
2506 | return -ret; | |
2f77fc4b DG |
2507 | } |
2508 | ||
2509 | ||
2510 | /* | |
2511 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2512 | */ | |
2513 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2514 | struct lttng_channel **channels) | |
2515 | { | |
2516 | int ret; | |
2517 | ssize_t nb_chan = 0; | |
2518 | ||
2519 | switch (domain) { | |
2520 | case LTTNG_DOMAIN_KERNEL: | |
2521 | if (session->kernel_session != NULL) { | |
2522 | nb_chan = session->kernel_session->channel_count; | |
2523 | } | |
2524 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2525 | if (nb_chan <= 0) { |
2526 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2527 | } | |
2f77fc4b DG |
2528 | break; |
2529 | case LTTNG_DOMAIN_UST: | |
2530 | if (session->ust_session != NULL) { | |
db81f999 | 2531 | rcu_read_lock(); |
2f77fc4b | 2532 | nb_chan = lttng_ht_get_count( |
db81f999 JG |
2533 | session->ust_session->domain_global.channels); |
2534 | rcu_read_unlock(); | |
2f77fc4b DG |
2535 | } |
2536 | DBG3("Number of UST global channels %zd", nb_chan); | |
9247b8d0 | 2537 | if (nb_chan < 0) { |
c7d620a2 | 2538 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
9247b8d0 | 2539 | goto error; |
c7d620a2 | 2540 | } |
2f77fc4b DG |
2541 | break; |
2542 | default: | |
f73fabfd | 2543 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2544 | goto error; |
2545 | } | |
2546 | ||
2547 | if (nb_chan > 0) { | |
2548 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2549 | if (*channels == NULL) { | |
f73fabfd | 2550 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2551 | goto error; |
2552 | } | |
2553 | ||
2554 | list_lttng_channels(domain, session, *channels); | |
2f77fc4b DG |
2555 | } |
2556 | ||
2557 | return nb_chan; | |
2558 | ||
2559 | error: | |
f73fabfd DG |
2560 | /* Return negative value to differentiate return code */ |
2561 | return -ret; | |
2f77fc4b DG |
2562 | } |
2563 | ||
2564 | /* | |
2565 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2566 | */ | |
2567 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2568 | char *channel_name, struct lttng_event **events) | |
2569 | { | |
2570 | int ret = 0; | |
2571 | ssize_t nb_event = 0; | |
2572 | ||
2573 | switch (domain) { | |
2574 | case LTTNG_DOMAIN_KERNEL: | |
2575 | if (session->kernel_session != NULL) { | |
2576 | nb_event = list_lttng_kernel_events(channel_name, | |
2577 | session->kernel_session, events); | |
2578 | } | |
2579 | break; | |
2580 | case LTTNG_DOMAIN_UST: | |
2581 | { | |
2582 | if (session->ust_session != NULL) { | |
2583 | nb_event = list_lttng_ust_global_events(channel_name, | |
2584 | &session->ust_session->domain_global, events); | |
2585 | } | |
2586 | break; | |
2587 | } | |
5cdb6027 | 2588 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f DG |
2589 | case LTTNG_DOMAIN_JUL: |
2590 | if (session->ust_session) { | |
fefd409b DG |
2591 | struct lttng_ht_iter iter; |
2592 | struct agent *agt; | |
2593 | ||
a3f99e26 | 2594 | rcu_read_lock(); |
fefd409b DG |
2595 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
2596 | &iter.iter, agt, node.node) { | |
2597 | nb_event = list_lttng_agent_events(agt, events); | |
2598 | } | |
a3f99e26 | 2599 | rcu_read_unlock(); |
3c6a091f DG |
2600 | } |
2601 | break; | |
2f77fc4b | 2602 | default: |
f73fabfd | 2603 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2604 | goto error; |
2605 | } | |
2606 | ||
f73fabfd | 2607 | return nb_event; |
2f77fc4b DG |
2608 | |
2609 | error: | |
f73fabfd DG |
2610 | /* Return negative value to differentiate return code */ |
2611 | return -ret; | |
2f77fc4b DG |
2612 | } |
2613 | ||
2614 | /* | |
2615 | * Using the session list, filled a lttng_session array to send back to the | |
2616 | * client for session listing. | |
2617 | * | |
2618 | * The session list lock MUST be acquired before calling this function. Use | |
2619 | * session_lock_list() and session_unlock_list(). | |
2620 | */ | |
2621 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2622 | gid_t gid) | |
2623 | { | |
2624 | int ret; | |
2625 | unsigned int i = 0; | |
2626 | struct ltt_session *session; | |
2627 | struct ltt_session_list *list = session_get_list(); | |
2628 | ||
2629 | DBG("Getting all available session for UID %d GID %d", | |
2630 | uid, gid); | |
2631 | /* | |
2632 | * Iterate over session list and append data after the control struct in | |
2633 | * the buffer. | |
2634 | */ | |
2635 | cds_list_for_each_entry(session, &list->head, list) { | |
2636 | /* | |
2637 | * Only list the sessions the user can control. | |
2638 | */ | |
2639 | if (!session_access_ok(session, uid, gid)) { | |
2640 | continue; | |
2641 | } | |
2642 | ||
2643 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2644 | struct ltt_ust_session *usess = session->ust_session; | |
2645 | ||
2646 | if (session->consumer->type == CONSUMER_DST_NET || | |
2647 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2648 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2649 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2650 | sizeof(sessions[i].path), session); |
2f77fc4b | 2651 | } else { |
dec56f6c | 2652 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2653 | session->consumer->dst.trace_path); |
2654 | } | |
2655 | if (ret < 0) { | |
2656 | PERROR("snprintf session path"); | |
2657 | continue; | |
2658 | } | |
2659 | ||
2660 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2661 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 2662 | sessions[i].enabled = session->active; |
2cbf8fed | 2663 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 2664 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
2665 | i++; |
2666 | } | |
2667 | } | |
2668 | ||
806e2684 | 2669 | /* |
6d805429 | 2670 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2671 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2672 | */ |
6d805429 | 2673 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2674 | { |
2675 | int ret; | |
2676 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2677 | struct ltt_ust_session *usess = session->ust_session; | |
2678 | ||
2679 | assert(session); | |
2680 | ||
2681 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 2682 | if (session->active) { |
806e2684 DG |
2683 | ret = LTTNG_ERR_SESSION_STARTED; |
2684 | goto error; | |
3a89d11a DG |
2685 | } else { |
2686 | /* | |
2687 | * If stopped, just make sure we've started before else the above call | |
2688 | * will always send that there is data pending. | |
2689 | * | |
2690 | * The consumer assumes that when the data pending command is received, | |
2691 | * the trace has been started before or else no output data is written | |
2692 | * by the streams which is a condition for data pending. So, this is | |
2693 | * *VERY* important that we don't ask the consumer before a start | |
2694 | * trace. | |
2695 | */ | |
8382cf6f | 2696 | if (!session->has_been_started) { |
3a89d11a DG |
2697 | ret = 0; |
2698 | goto error; | |
2699 | } | |
806e2684 DG |
2700 | } |
2701 | ||
2702 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2703 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2704 | if (ret == 1) { | |
806e2684 DG |
2705 | /* Data is still being extracted for the kernel. */ |
2706 | goto error; | |
2707 | } | |
2708 | } | |
2709 | ||
2710 | if (usess && usess->consumer) { | |
6d805429 DG |
2711 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2712 | if (ret == 1) { | |
806e2684 DG |
2713 | /* Data is still being extracted for the kernel. */ |
2714 | goto error; | |
2715 | } | |
2716 | } | |
2717 | ||
2718 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2719 | ret = 0; |
806e2684 DG |
2720 | |
2721 | error: | |
2722 | return ret; | |
2723 | } | |
2724 | ||
6dc3064a DG |
2725 | /* |
2726 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2727 | * | |
2728 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2729 | */ | |
2730 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2731 | struct lttng_snapshot_output *output, uint32_t *id) | |
2732 | { | |
2733 | int ret; | |
2734 | struct snapshot_output *new_output; | |
2735 | ||
2736 | assert(session); | |
2737 | assert(output); | |
2738 | ||
2739 | DBG("Cmd snapshot add output for session %s", session->name); | |
2740 | ||
2741 | /* | |
d3f14b8a MD |
2742 | * Permission denied to create an output if the session is not |
2743 | * set in no output mode. | |
6dc3064a DG |
2744 | */ |
2745 | if (session->output_traces) { | |
2746 | ret = LTTNG_ERR_EPERM; | |
2747 | goto error; | |
2748 | } | |
2749 | ||
2750 | /* Only one output is allowed until we have the "tee" feature. */ | |
2751 | if (session->snapshot.nb_output == 1) { | |
2752 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2753 | goto error; | |
2754 | } | |
2755 | ||
2756 | new_output = snapshot_output_alloc(); | |
2757 | if (!new_output) { | |
2758 | ret = LTTNG_ERR_NOMEM; | |
2759 | goto error; | |
2760 | } | |
2761 | ||
2762 | ret = snapshot_output_init(output->max_size, output->name, | |
2763 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2764 | &session->snapshot); | |
2765 | if (ret < 0) { | |
2766 | if (ret == -ENOMEM) { | |
2767 | ret = LTTNG_ERR_NOMEM; | |
2768 | } else { | |
2769 | ret = LTTNG_ERR_INVALID; | |
2770 | } | |
2771 | goto free_error; | |
2772 | } | |
2773 | ||
6dc3064a DG |
2774 | rcu_read_lock(); |
2775 | snapshot_add_output(&session->snapshot, new_output); | |
2776 | if (id) { | |
2777 | *id = new_output->id; | |
2778 | } | |
2779 | rcu_read_unlock(); | |
2780 | ||
2781 | return LTTNG_OK; | |
2782 | ||
2783 | free_error: | |
2784 | snapshot_output_destroy(new_output); | |
2785 | error: | |
2786 | return ret; | |
2787 | } | |
2788 | ||
2789 | /* | |
2790 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2791 | * | |
2792 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2793 | */ | |
2794 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2795 | struct lttng_snapshot_output *output) | |
2796 | { | |
2797 | int ret; | |
eb240553 | 2798 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2799 | |
2800 | assert(session); | |
2801 | assert(output); | |
2802 | ||
6dc3064a DG |
2803 | rcu_read_lock(); |
2804 | ||
2805 | /* | |
d3f14b8a MD |
2806 | * Permission denied to create an output if the session is not |
2807 | * set in no output mode. | |
6dc3064a DG |
2808 | */ |
2809 | if (session->output_traces) { | |
2810 | ret = LTTNG_ERR_EPERM; | |
2811 | goto error; | |
2812 | } | |
2813 | ||
eb240553 DG |
2814 | if (output->id) { |
2815 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2816 | session->name); | |
2817 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2818 | } else if (*output->name != '\0') { | |
2819 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2820 | session->name); | |
2821 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2822 | } | |
6dc3064a DG |
2823 | if (!sout) { |
2824 | ret = LTTNG_ERR_INVALID; | |
2825 | goto error; | |
2826 | } | |
2827 | ||
2828 | snapshot_delete_output(&session->snapshot, sout); | |
2829 | snapshot_output_destroy(sout); | |
2830 | ret = LTTNG_OK; | |
2831 | ||
2832 | error: | |
2833 | rcu_read_unlock(); | |
2834 | return ret; | |
2835 | } | |
2836 | ||
2837 | /* | |
2838 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2839 | * | |
2840 | * If no output is available, outputs is untouched and 0 is returned. | |
2841 | * | |
2842 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2843 | */ | |
2844 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2845 | struct lttng_snapshot_output **outputs) | |
2846 | { | |
2847 | int ret, idx = 0; | |
377b9cab | 2848 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
2849 | struct lttng_ht_iter iter; |
2850 | struct snapshot_output *output; | |
2851 | ||
2852 | assert(session); | |
2853 | assert(outputs); | |
2854 | ||
2855 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2856 | ||
2857 | /* | |
d3f14b8a MD |
2858 | * Permission denied to create an output if the session is not |
2859 | * set in no output mode. | |
6dc3064a DG |
2860 | */ |
2861 | if (session->output_traces) { | |
377b9cab | 2862 | ret = -LTTNG_ERR_EPERM; |
6dc3064a DG |
2863 | goto error; |
2864 | } | |
2865 | ||
2866 | if (session->snapshot.nb_output == 0) { | |
2867 | ret = 0; | |
2868 | goto error; | |
2869 | } | |
2870 | ||
2871 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2872 | if (!list) { | |
377b9cab | 2873 | ret = -LTTNG_ERR_NOMEM; |
6dc3064a DG |
2874 | goto error; |
2875 | } | |
2876 | ||
2877 | /* Copy list from session to the new list object. */ | |
377b9cab | 2878 | rcu_read_lock(); |
6dc3064a DG |
2879 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
2880 | output, node.node) { | |
2881 | assert(output->consumer); | |
2882 | list[idx].id = output->id; | |
2883 | list[idx].max_size = output->max_size; | |
e8555dff MD |
2884 | if (lttng_strncpy(list[idx].name, output->name, |
2885 | sizeof(list[idx].name))) { | |
2886 | ret = -LTTNG_ERR_INVALID; | |
2887 | goto error; | |
2888 | } | |
6dc3064a | 2889 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
e8555dff MD |
2890 | if (lttng_strncpy(list[idx].ctrl_url, |
2891 | output->consumer->dst.trace_path, | |
2892 | sizeof(list[idx].ctrl_url))) { | |
2893 | ret = -LTTNG_ERR_INVALID; | |
2894 | goto error; | |
2895 | } | |
6dc3064a DG |
2896 | } else { |
2897 | /* Control URI. */ | |
2898 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
2899 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
2900 | if (ret < 0) { | |
377b9cab JG |
2901 | ret = -LTTNG_ERR_NOMEM; |
2902 | goto error; | |
6dc3064a DG |
2903 | } |
2904 | ||
2905 | /* Data URI. */ | |
2906 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
2907 | list[idx].data_url, sizeof(list[idx].data_url)); | |
2908 | if (ret < 0) { | |
377b9cab JG |
2909 | ret = -LTTNG_ERR_NOMEM; |
2910 | goto error; | |
6dc3064a DG |
2911 | } |
2912 | } | |
2913 | idx++; | |
2914 | } | |
2915 | ||
2916 | *outputs = list; | |
377b9cab JG |
2917 | list = NULL; |
2918 | ret = session->snapshot.nb_output; | |
6dc3064a | 2919 | error: |
377b9cab JG |
2920 | free(list); |
2921 | rcu_read_unlock(); | |
2922 | return ret; | |
6dc3064a DG |
2923 | } |
2924 | ||
2925 | /* | |
2926 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
2927 | * snapshot output is *not* set with a remote destination. | |
2928 | * | |
a934f4af | 2929 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2930 | */ |
2931 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
2932 | struct snapshot_output *snap_output, struct ltt_session *session) | |
2933 | { | |
a934f4af | 2934 | int ret = LTTNG_OK; |
6dc3064a DG |
2935 | struct lttng_ht_iter iter; |
2936 | struct consumer_socket *socket; | |
2937 | ||
2938 | assert(consumer); | |
2939 | assert(snap_output); | |
2940 | assert(session); | |
2941 | ||
2942 | DBG2("Set relayd object from snapshot output"); | |
2943 | ||
2944 | /* Ignore if snapshot consumer output is not network. */ | |
2945 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
2946 | goto error; | |
2947 | } | |
2948 | ||
2949 | /* | |
2950 | * For each consumer socket, create and send the relayd object of the | |
2951 | * snapshot output. | |
2952 | */ | |
2953 | rcu_read_lock(); | |
5eecee74 DG |
2954 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
2955 | socket, node.node) { | |
6dc3064a | 2956 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
2957 | snap_output->consumer, socket, |
2958 | session->name, session->hostname, | |
2959 | session->live_timer); | |
a934f4af | 2960 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2961 | rcu_read_unlock(); |
2962 | goto error; | |
2963 | } | |
2964 | } | |
2965 | rcu_read_unlock(); | |
2966 | ||
2967 | error: | |
2968 | return ret; | |
2969 | } | |
2970 | ||
2971 | /* | |
2972 | * Record a kernel snapshot. | |
2973 | * | |
fac41e72 | 2974 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
2975 | */ |
2976 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded | 2977 | struct snapshot_output *output, struct ltt_session *session, |
135347bd | 2978 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
2979 | { |
2980 | int ret; | |
2981 | ||
2982 | assert(ksess); | |
2983 | assert(output); | |
2984 | assert(session); | |
2985 | ||
10a50311 | 2986 | |
af706bb7 DG |
2987 | /* |
2988 | * Copy kernel session sockets so we can communicate with the right | |
2989 | * consumer for the snapshot record command. | |
2990 | */ | |
2991 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
2992 | if (ret < 0) { | |
a934f4af | 2993 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2994 | goto error; |
6dc3064a DG |
2995 | } |
2996 | ||
2997 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 2998 | if (ret != LTTNG_OK) { |
af706bb7 | 2999 | goto error_snapshot; |
6dc3064a DG |
3000 | } |
3001 | ||
135347bd | 3002 | ret = kernel_snapshot_record(ksess, output, wait, nb_packets_per_stream); |
2a06df8d | 3003 | if (ret != LTTNG_OK) { |
af706bb7 | 3004 | goto error_snapshot; |
6dc3064a DG |
3005 | } |
3006 | ||
a934f4af | 3007 | ret = LTTNG_OK; |
fa7fee60 | 3008 | goto end; |
a934f4af | 3009 | |
af706bb7 DG |
3010 | error_snapshot: |
3011 | /* Clean up copied sockets so this output can use some other later on. */ | |
3012 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a | 3013 | error: |
fa7fee60 | 3014 | end: |
6dc3064a DG |
3015 | return ret; |
3016 | } | |
3017 | ||
3018 | /* | |
3019 | * Record a UST snapshot. | |
3020 | * | |
a934f4af | 3021 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
3022 | */ |
3023 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 3024 | struct snapshot_output *output, struct ltt_session *session, |
135347bd | 3025 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3026 | { |
3027 | int ret; | |
3028 | ||
3029 | assert(usess); | |
3030 | assert(output); | |
3031 | assert(session); | |
3032 | ||
af706bb7 | 3033 | /* |
d3f14b8a | 3034 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
3035 | * consumer for the snapshot record command. |
3036 | */ | |
3037 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
3038 | if (ret < 0) { | |
a934f4af | 3039 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3040 | goto error; |
6dc3064a DG |
3041 | } |
3042 | ||
3043 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 3044 | if (ret != LTTNG_OK) { |
af706bb7 | 3045 | goto error_snapshot; |
6dc3064a DG |
3046 | } |
3047 | ||
135347bd | 3048 | ret = ust_app_snapshot_record(usess, output, wait, nb_packets_per_stream); |
6dc3064a | 3049 | if (ret < 0) { |
7badf927 DG |
3050 | switch (-ret) { |
3051 | case EINVAL: | |
a934f4af | 3052 | ret = LTTNG_ERR_INVALID; |
7badf927 | 3053 | break; |
7badf927 DG |
3054 | default: |
3055 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
3056 | break; | |
5c786ded | 3057 | } |
af706bb7 | 3058 | goto error_snapshot; |
6dc3064a DG |
3059 | } |
3060 | ||
a934f4af DG |
3061 | ret = LTTNG_OK; |
3062 | ||
af706bb7 DG |
3063 | error_snapshot: |
3064 | /* Clean up copied sockets so this output can use some other later on. */ | |
3065 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
3066 | error: |
3067 | return ret; | |
3068 | } | |
3069 | ||
135347bd MD |
3070 | static |
3071 | uint64_t get_session_size_one_more_packet_per_stream(struct ltt_session *session, | |
3072 | uint64_t cur_nr_packets) | |
68808f4e | 3073 | { |
135347bd | 3074 | uint64_t tot_size = 0; |
68808f4e DG |
3075 | |
3076 | if (session->kernel_session) { | |
3077 | struct ltt_kernel_channel *chan; | |
3078 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3079 | ||
68808f4e | 3080 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
135347bd MD |
3081 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
3082 | /* | |
3083 | * Don't take channel into account if we | |
3084 | * already grab all its packets. | |
3085 | */ | |
3086 | continue; | |
68808f4e | 3087 | } |
135347bd MD |
3088 | tot_size += chan->channel->attr.subbuf_size |
3089 | * chan->stream_count; | |
68808f4e DG |
3090 | } |
3091 | } | |
3092 | ||
3093 | if (session->ust_session) { | |
68808f4e DG |
3094 | struct ltt_ust_session *usess = session->ust_session; |
3095 | ||
135347bd MD |
3096 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
3097 | cur_nr_packets); | |
68808f4e DG |
3098 | } |
3099 | ||
135347bd | 3100 | return tot_size; |
68808f4e DG |
3101 | } |
3102 | ||
5c786ded | 3103 | /* |
135347bd MD |
3104 | * Calculate the number of packets we can grab from each stream that |
3105 | * fits within the overall snapshot max size. | |
3106 | * | |
3107 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
3108 | * the number of packets per stream. | |
3109 | * | |
3110 | * TODO: this approach is not perfect: we consider the worse case | |
3111 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
3112 | * better if we do this calculation while we actually grab the packet | |
3113 | * content: we would know how much padding we don't actually store into | |
3114 | * the file. | |
3115 | * | |
3116 | * This algorithm is currently bounded by the number of packets per | |
3117 | * stream. | |
3118 | * | |
3119 | * Since we call this algorithm before actually grabbing the data, it's | |
3120 | * an approximation: for instance, applications could appear/disappear | |
3121 | * in between this call and actually grabbing data. | |
5c786ded | 3122 | */ |
135347bd MD |
3123 | static |
3124 | int64_t get_session_nb_packets_per_stream(struct ltt_session *session, uint64_t max_size) | |
5c786ded | 3125 | { |
135347bd MD |
3126 | int64_t size_left; |
3127 | uint64_t cur_nb_packets = 0; | |
5c786ded | 3128 | |
135347bd MD |
3129 | if (!max_size) { |
3130 | return 0; /* Infinite */ | |
5c786ded JD |
3131 | } |
3132 | ||
135347bd MD |
3133 | size_left = max_size; |
3134 | for (;;) { | |
3135 | uint64_t one_more_packet_tot_size; | |
5c786ded | 3136 | |
135347bd MD |
3137 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream(session, |
3138 | cur_nb_packets); | |
3139 | if (!one_more_packet_tot_size) { | |
3140 | /* We are already grabbing all packets. */ | |
3141 | break; | |
3142 | } | |
3143 | size_left -= one_more_packet_tot_size; | |
3144 | if (size_left < 0) { | |
3145 | break; | |
3146 | } | |
3147 | cur_nb_packets++; | |
5c786ded | 3148 | } |
135347bd MD |
3149 | if (!cur_nb_packets) { |
3150 | /* Not enough room to grab one packet of each stream, error. */ | |
3151 | return -1; | |
3152 | } | |
3153 | return cur_nb_packets; | |
5c786ded JD |
3154 | } |
3155 | ||
6dc3064a DG |
3156 | /* |
3157 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3158 | * | |
3159 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3160 | * complete before returning. | |
3161 | * | |
3162 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3163 | */ | |
3164 | int cmd_snapshot_record(struct ltt_session *session, | |
3165 | struct lttng_snapshot_output *output, int wait) | |
3166 | { | |
3167 | int ret = LTTNG_OK; | |
e1986656 DG |
3168 | unsigned int use_tmp_output = 0; |
3169 | struct snapshot_output tmp_output; | |
d4769e14 | 3170 | unsigned int snapshot_success = 0; |
89b5296d | 3171 | char datetime[16]; |
6dc3064a DG |
3172 | |
3173 | assert(session); | |
ba45d9f0 | 3174 | assert(output); |
6dc3064a DG |
3175 | |
3176 | DBG("Cmd snapshot record for session %s", session->name); | |
3177 | ||
89b5296d JR |
3178 | /* Get the datetime for the snapshot output directory. */ |
3179 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
3180 | sizeof(datetime)); | |
3181 | if (!ret) { | |
3182 | ret = LTTNG_ERR_INVALID; | |
3183 | goto error; | |
3184 | } | |
3185 | ||
6dc3064a | 3186 | /* |
d3f14b8a MD |
3187 | * Permission denied to create an output if the session is not |
3188 | * set in no output mode. | |
6dc3064a DG |
3189 | */ |
3190 | if (session->output_traces) { | |
3191 | ret = LTTNG_ERR_EPERM; | |
3192 | goto error; | |
3193 | } | |
3194 | ||
3195 | /* The session needs to be started at least once. */ | |
8382cf6f | 3196 | if (!session->has_been_started) { |
6dc3064a DG |
3197 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3198 | goto error; | |
3199 | } | |
3200 | ||
3201 | /* Use temporary output for the session. */ | |
ba45d9f0 | 3202 | if (*output->ctrl_url != '\0') { |
6dc3064a DG |
3203 | ret = snapshot_output_init(output->max_size, output->name, |
3204 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3205 | &tmp_output, NULL); |
6dc3064a DG |
3206 | if (ret < 0) { |
3207 | if (ret == -ENOMEM) { | |
3208 | ret = LTTNG_ERR_NOMEM; | |
3209 | } else { | |
3210 | ret = LTTNG_ERR_INVALID; | |
3211 | } | |
3212 | goto error; | |
3213 | } | |
1bfe7328 DG |
3214 | /* Use the global session count for the temporary snapshot. */ |
3215 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
89b5296d JR |
3216 | |
3217 | /* Use the global datetime */ | |
3218 | memcpy(tmp_output.datetime, datetime, sizeof(datetime)); | |
e1986656 | 3219 | use_tmp_output = 1; |
6dc3064a DG |
3220 | } |
3221 | ||
d7599880 JR |
3222 | if (use_tmp_output) { |
3223 | int64_t nb_packets_per_stream; | |
6dc3064a | 3224 | |
d7599880 JR |
3225 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, |
3226 | tmp_output.max_size); | |
3227 | if (nb_packets_per_stream < 0) { | |
3228 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3229 | goto error; | |
3230 | } | |
135347bd | 3231 | |
d7599880 JR |
3232 | if (session->kernel_session) { |
3233 | ret = record_kernel_snapshot(session->kernel_session, | |
3234 | &tmp_output, session, | |
3235 | wait, nb_packets_per_stream); | |
3236 | if (ret != LTTNG_OK) { | |
135347bd MD |
3237 | goto error; |
3238 | } | |
d7599880 JR |
3239 | } |
3240 | ||
3241 | if (session->ust_session) { | |
3242 | ret = record_ust_snapshot(session->ust_session, | |
3243 | &tmp_output, session, | |
135347bd | 3244 | wait, nb_packets_per_stream); |
a934f4af | 3245 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3246 | goto error; |
3247 | } | |
d7599880 | 3248 | } |
e1986656 | 3249 | |
d7599880 JR |
3250 | snapshot_success = 1; |
3251 | } else { | |
3252 | struct snapshot_output *sout; | |
3253 | struct lttng_ht_iter iter; | |
68808f4e | 3254 | |
d7599880 JR |
3255 | rcu_read_lock(); |
3256 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3257 | &iter.iter, sout, node.node) { | |
3258 | int64_t nb_packets_per_stream; | |
e1986656 | 3259 | |
d7599880 JR |
3260 | /* |
3261 | * Make a local copy of the output and assign the possible | |
3262 | * temporary value given by the caller. | |
3263 | */ | |
3264 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3265 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
1bfe7328 | 3266 | |
d7599880 JR |
3267 | if (output->max_size != (uint64_t) -1ULL) { |
3268 | tmp_output.max_size = output->max_size; | |
6dc3064a | 3269 | } |
135347bd MD |
3270 | |
3271 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
3272 | tmp_output.max_size); | |
3273 | if (nb_packets_per_stream < 0) { | |
3274 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
d7599880 | 3275 | rcu_read_unlock(); |
135347bd MD |
3276 | goto error; |
3277 | } | |
6dc3064a | 3278 | |
d7599880 JR |
3279 | /* Use temporary name. */ |
3280 | if (*output->name != '\0') { | |
0374fda0 MD |
3281 | if (lttng_strncpy(tmp_output.name, output->name, |
3282 | sizeof(tmp_output.name))) { | |
3283 | ret = LTTNG_ERR_INVALID; | |
3284 | rcu_read_unlock(); | |
3285 | goto error; | |
3286 | } | |
d7599880 | 3287 | } |
e1986656 | 3288 | |
d7599880 | 3289 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
89b5296d | 3290 | memcpy(tmp_output.datetime, datetime, sizeof(datetime)); |
e1986656 | 3291 | |
d7599880 JR |
3292 | if (session->kernel_session) { |
3293 | ret = record_kernel_snapshot(session->kernel_session, | |
3294 | &tmp_output, session, | |
3295 | wait, nb_packets_per_stream); | |
3296 | if (ret != LTTNG_OK) { | |
135347bd | 3297 | rcu_read_unlock(); |
68808f4e DG |
3298 | goto error; |
3299 | } | |
d7599880 | 3300 | } |
68808f4e | 3301 | |
d7599880 JR |
3302 | if (session->ust_session) { |
3303 | ret = record_ust_snapshot(session->ust_session, | |
3304 | &tmp_output, session, | |
135347bd | 3305 | wait, nb_packets_per_stream); |
a934f4af | 3306 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3307 | rcu_read_unlock(); |
3308 | goto error; | |
3309 | } | |
3310 | } | |
d7599880 | 3311 | snapshot_success = 1; |
6dc3064a | 3312 | } |
d7599880 | 3313 | rcu_read_unlock(); |
6dc3064a DG |
3314 | } |
3315 | ||
1bfe7328 DG |
3316 | if (snapshot_success) { |
3317 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3318 | } else { |
3319 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3320 | } |
3321 | ||
6dc3064a | 3322 | error: |
6dc3064a DG |
3323 | return ret; |
3324 | } | |
3325 | ||
2f77fc4b DG |
3326 | /* |
3327 | * Init command subsystem. | |
3328 | */ | |
3329 | void cmd_init(void) | |
3330 | { | |
3331 | /* | |
d88aee68 DG |
3332 | * Set network sequence index to 1 for streams to match a relayd |
3333 | * socket on the consumer side. | |
2f77fc4b | 3334 | */ |
d88aee68 DG |
3335 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3336 | relayd_net_seq_idx = 1; | |
3337 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3338 | |
3339 | DBG("Command subsystem initialized"); | |
3340 | } |