Commit | Line | Data |
---|---|---|
2f77fc4b DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
6dc3064a | 20 | #include <inttypes.h> |
2f77fc4b DG |
21 | #include <urcu/list.h> |
22 | #include <urcu/uatomic.h> | |
23 | ||
24 | #include <common/defaults.h> | |
25 | #include <common/common.h> | |
26 | #include <common/sessiond-comm/sessiond-comm.h> | |
27 | #include <common/relayd/relayd.h> | |
10a50311 | 28 | #include <common/utils.h> |
2f77fc4b DG |
29 | |
30 | #include "channel.h" | |
31 | #include "consumer.h" | |
32 | #include "event.h" | |
8782cc74 | 33 | #include "health-sessiond.h" |
2f77fc4b DG |
34 | #include "kernel.h" |
35 | #include "kernel-consumer.h" | |
36 | #include "lttng-sessiond.h" | |
37 | #include "utils.h" | |
38 | ||
39 | #include "cmd.h" | |
40 | ||
41 | /* | |
42 | * Used to keep a unique index for each relayd socket created where this value | |
43 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
44 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
45 | * held. | |
2f77fc4b | 46 | */ |
d88aee68 DG |
47 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
48 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b DG |
49 | |
50 | /* | |
51 | * Create a session path used by list_lttng_sessions for the case that the | |
52 | * session consumer is on the network. | |
53 | */ | |
54 | static int build_network_session_path(char *dst, size_t size, | |
55 | struct ltt_session *session) | |
56 | { | |
57 | int ret, kdata_port, udata_port; | |
58 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
59 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
60 | ||
61 | assert(session); | |
62 | assert(dst); | |
63 | ||
64 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
65 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
66 | ||
67 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
68 | ||
69 | if (session->kernel_session && session->kernel_session->consumer) { | |
70 | kuri = &session->kernel_session->consumer->dst.net.control; | |
71 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
72 | } | |
73 | ||
74 | if (session->ust_session && session->ust_session->consumer) { | |
75 | uuri = &session->ust_session->consumer->dst.net.control; | |
76 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
77 | } | |
78 | ||
79 | if (uuri == NULL && kuri == NULL) { | |
80 | uri = &session->consumer->dst.net.control; | |
81 | kdata_port = session->consumer->dst.net.data.port; | |
82 | } else if (kuri && uuri) { | |
83 | ret = uri_compare(kuri, uuri); | |
84 | if (ret) { | |
85 | /* Not Equal */ | |
86 | uri = kuri; | |
87 | /* Build uuri URL string */ | |
88 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
89 | if (ret < 0) { | |
90 | goto error; | |
91 | } | |
92 | } else { | |
93 | uri = kuri; | |
94 | } | |
95 | } else if (kuri && uuri == NULL) { | |
96 | uri = kuri; | |
97 | } else if (uuri && kuri == NULL) { | |
98 | uri = uuri; | |
99 | } | |
100 | ||
101 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
102 | if (ret < 0) { | |
103 | goto error; | |
104 | } | |
105 | ||
9aa9f900 DG |
106 | /* |
107 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
108 | * to print. | |
109 | */ | |
9d035200 | 110 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
111 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
112 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
113 | } else { | |
9aa9f900 | 114 | int dport; |
bef08707 | 115 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
116 | dport = kdata_port; |
117 | } else { | |
118 | /* No kernel URI, use the UST port. */ | |
119 | dport = udata_port; | |
120 | } | |
121 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
122 | } |
123 | ||
124 | error: | |
125 | return ret; | |
126 | } | |
127 | ||
128 | /* | |
129 | * Fill lttng_channel array of all channels. | |
130 | */ | |
131 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
132 | struct lttng_channel *channels) | |
133 | { | |
134 | int i = 0; | |
135 | struct ltt_kernel_channel *kchan; | |
136 | ||
137 | DBG("Listing channels for session %s", session->name); | |
138 | ||
139 | switch (domain) { | |
140 | case LTTNG_DOMAIN_KERNEL: | |
141 | /* Kernel channels */ | |
142 | if (session->kernel_session != NULL) { | |
143 | cds_list_for_each_entry(kchan, | |
144 | &session->kernel_session->channel_list.head, list) { | |
145 | /* Copy lttng_channel struct to array */ | |
146 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
147 | channels[i].enabled = kchan->enabled; | |
148 | i++; | |
149 | } | |
150 | } | |
151 | break; | |
152 | case LTTNG_DOMAIN_UST: | |
153 | { | |
154 | struct lttng_ht_iter iter; | |
155 | struct ltt_ust_channel *uchan; | |
156 | ||
e7fe706f | 157 | rcu_read_lock(); |
2f77fc4b DG |
158 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
159 | &iter.iter, uchan, node.node) { | |
160 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
161 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
162 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
163 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
164 | channels[i].attr.switch_timer_interval = | |
165 | uchan->attr.switch_timer_interval; | |
166 | channels[i].attr.read_timer_interval = | |
167 | uchan->attr.read_timer_interval; | |
168 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
169 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
170 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
2f77fc4b DG |
171 | switch (uchan->attr.output) { |
172 | case LTTNG_UST_MMAP: | |
173 | default: | |
174 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
175 | break; | |
176 | } | |
177 | i++; | |
178 | } | |
e7fe706f | 179 | rcu_read_unlock(); |
2f77fc4b DG |
180 | break; |
181 | } | |
182 | default: | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
3c6a091f DG |
187 | /* |
188 | * Create a list of JUL domain events. | |
189 | * | |
190 | * Return number of events in list on success or else a negative value. | |
191 | */ | |
192 | static int list_lttng_jul_events(struct jul_domain *dom, | |
193 | struct lttng_event **events) | |
194 | { | |
195 | int i = 0, ret = 0; | |
196 | unsigned int nb_event = 0; | |
197 | struct jul_event *event; | |
198 | struct lttng_event *tmp_events; | |
199 | struct lttng_ht_iter iter; | |
200 | ||
201 | assert(dom); | |
202 | assert(events); | |
203 | ||
204 | DBG3("Listing JUL events"); | |
205 | ||
206 | nb_event = lttng_ht_get_count(dom->events); | |
207 | if (nb_event == 0) { | |
208 | ret = nb_event; | |
209 | goto error; | |
210 | } | |
211 | ||
212 | tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); | |
213 | if (!tmp_events) { | |
214 | PERROR("zmalloc JUL events session"); | |
215 | ret = -LTTNG_ERR_FATAL; | |
216 | goto error; | |
217 | } | |
218 | ||
219 | rcu_read_lock(); | |
220 | cds_lfht_for_each_entry(dom->events->ht, &iter.iter, event, node.node) { | |
221 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); | |
222 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
223 | tmp_events[i].enabled = event->enabled; | |
224 | i++; | |
225 | } | |
226 | rcu_read_unlock(); | |
227 | ||
228 | *events = tmp_events; | |
229 | ret = nb_event; | |
230 | ||
231 | error: | |
232 | assert(nb_event == i); | |
233 | return ret; | |
234 | } | |
235 | ||
2f77fc4b DG |
236 | /* |
237 | * Create a list of ust global domain events. | |
238 | */ | |
239 | static int list_lttng_ust_global_events(char *channel_name, | |
240 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
241 | { | |
242 | int i = 0, ret = 0; | |
243 | unsigned int nb_event = 0; | |
244 | struct lttng_ht_iter iter; | |
245 | struct lttng_ht_node_str *node; | |
246 | struct ltt_ust_channel *uchan; | |
247 | struct ltt_ust_event *uevent; | |
248 | struct lttng_event *tmp; | |
249 | ||
250 | DBG("Listing UST global events for channel %s", channel_name); | |
251 | ||
252 | rcu_read_lock(); | |
253 | ||
254 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
255 | node = lttng_ht_iter_get_node_str(&iter); | |
256 | if (node == NULL) { | |
f73fabfd | 257 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
258 | goto error; |
259 | } | |
260 | ||
261 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
262 | ||
263 | nb_event += lttng_ht_get_count(uchan->events); | |
264 | ||
265 | if (nb_event == 0) { | |
266 | ret = nb_event; | |
267 | goto error; | |
268 | } | |
269 | ||
270 | DBG3("Listing UST global %d events", nb_event); | |
271 | ||
272 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
273 | if (tmp == NULL) { | |
f73fabfd | 274 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
275 | goto error; |
276 | } | |
277 | ||
278 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
279 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
280 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
281 | tmp[i].enabled = uevent->enabled; | |
282 | ||
283 | switch (uevent->attr.instrumentation) { | |
284 | case LTTNG_UST_TRACEPOINT: | |
285 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
286 | break; | |
287 | case LTTNG_UST_PROBE: | |
288 | tmp[i].type = LTTNG_EVENT_PROBE; | |
289 | break; | |
290 | case LTTNG_UST_FUNCTION: | |
291 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
292 | break; | |
293 | } | |
294 | ||
295 | tmp[i].loglevel = uevent->attr.loglevel; | |
296 | switch (uevent->attr.loglevel_type) { | |
297 | case LTTNG_UST_LOGLEVEL_ALL: | |
298 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
299 | break; | |
300 | case LTTNG_UST_LOGLEVEL_RANGE: | |
301 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
302 | break; | |
303 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
304 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
305 | break; | |
306 | } | |
307 | if (uevent->filter) { | |
308 | tmp[i].filter = 1; | |
309 | } | |
4634f12e JI |
310 | if (uevent->exclusion) { |
311 | tmp[i].exclusion = 1; | |
312 | } | |
2f77fc4b DG |
313 | i++; |
314 | } | |
315 | ||
316 | ret = nb_event; | |
317 | *events = tmp; | |
318 | ||
319 | error: | |
320 | rcu_read_unlock(); | |
321 | return ret; | |
322 | } | |
323 | ||
324 | /* | |
325 | * Fill lttng_event array of all kernel events in the channel. | |
326 | */ | |
327 | static int list_lttng_kernel_events(char *channel_name, | |
328 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
329 | { | |
330 | int i = 0, ret; | |
331 | unsigned int nb_event; | |
332 | struct ltt_kernel_event *event; | |
333 | struct ltt_kernel_channel *kchan; | |
334 | ||
335 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
336 | if (kchan == NULL) { | |
f73fabfd | 337 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
338 | goto error; |
339 | } | |
340 | ||
341 | nb_event = kchan->event_count; | |
342 | ||
343 | DBG("Listing events for channel %s", kchan->channel->name); | |
344 | ||
345 | if (nb_event == 0) { | |
f73fabfd | 346 | goto end; |
2f77fc4b DG |
347 | } |
348 | ||
349 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
350 | if (*events == NULL) { | |
f73fabfd | 351 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
352 | goto error; |
353 | } | |
354 | ||
355 | /* Kernel channels */ | |
356 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
357 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
358 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
359 | (*events)[i].enabled = event->enabled; | |
360 | ||
361 | switch (event->event->instrumentation) { | |
362 | case LTTNG_KERNEL_TRACEPOINT: | |
363 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
364 | break; | |
2f77fc4b | 365 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
366 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
367 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
368 | sizeof(struct lttng_kernel_kprobe)); | |
369 | break; | |
370 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
371 | (*events)[i].type = LTTNG_EVENT_PROBE; |
372 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
373 | sizeof(struct lttng_kernel_kprobe)); | |
374 | break; | |
375 | case LTTNG_KERNEL_FUNCTION: | |
376 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
377 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
378 | sizeof(struct lttng_kernel_function)); | |
379 | break; | |
380 | case LTTNG_KERNEL_NOOP: | |
381 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
382 | break; | |
383 | case LTTNG_KERNEL_SYSCALL: | |
384 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
385 | break; | |
386 | case LTTNG_KERNEL_ALL: | |
387 | assert(0); | |
388 | break; | |
389 | } | |
390 | i++; | |
391 | } | |
392 | ||
f73fabfd | 393 | end: |
2f77fc4b DG |
394 | return nb_event; |
395 | ||
396 | error: | |
f73fabfd DG |
397 | /* Negate the error code to differentiate the size from an error */ |
398 | return -ret; | |
2f77fc4b DG |
399 | } |
400 | ||
401 | /* | |
402 | * Add URI so the consumer output object. Set the correct path depending on the | |
403 | * domain adding the default trace directory. | |
404 | */ | |
405 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
406 | struct lttng_uri *uri, int domain, const char *session_name) | |
407 | { | |
f73fabfd | 408 | int ret = LTTNG_OK; |
2f77fc4b DG |
409 | const char *default_trace_dir; |
410 | ||
411 | assert(uri); | |
412 | ||
413 | if (consumer == NULL) { | |
414 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 415 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
416 | goto error; |
417 | } | |
418 | ||
419 | switch (domain) { | |
420 | case LTTNG_DOMAIN_KERNEL: | |
421 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
422 | break; | |
423 | case LTTNG_DOMAIN_UST: | |
424 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
425 | break; | |
426 | default: | |
427 | /* | |
428 | * This case is possible is we try to add the URI to the global tracing | |
429 | * session consumer object which in this case there is no subdir. | |
430 | */ | |
431 | default_trace_dir = ""; | |
432 | } | |
433 | ||
434 | switch (uri->dtype) { | |
435 | case LTTNG_DST_IPV4: | |
436 | case LTTNG_DST_IPV6: | |
437 | DBG2("Setting network URI to consumer"); | |
438 | ||
df75acac DG |
439 | if (consumer->type == CONSUMER_DST_NET) { |
440 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
441 | consumer->dst.net.control_isset) || |
442 | (uri->stype == LTTNG_STREAM_DATA && | |
443 | consumer->dst.net.data_isset)) { | |
df75acac DG |
444 | ret = LTTNG_ERR_URL_EXIST; |
445 | goto error; | |
446 | } | |
447 | } else { | |
448 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
449 | } |
450 | ||
df75acac DG |
451 | consumer->type = CONSUMER_DST_NET; |
452 | ||
2f77fc4b DG |
453 | /* Set URI into consumer output object */ |
454 | ret = consumer_set_network_uri(consumer, uri); | |
455 | if (ret < 0) { | |
a74934ba | 456 | ret = -ret; |
2f77fc4b DG |
457 | goto error; |
458 | } else if (ret == 1) { | |
459 | /* | |
460 | * URI was the same in the consumer so we do not append the subdir | |
461 | * again so to not duplicate output dir. | |
462 | */ | |
f86c9f4e | 463 | ret = LTTNG_OK; |
2f77fc4b DG |
464 | goto error; |
465 | } | |
466 | ||
467 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
468 | ret = consumer_set_subdir(consumer, session_name); | |
469 | if (ret < 0) { | |
f73fabfd | 470 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
471 | goto error; |
472 | } | |
473 | } | |
474 | ||
475 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
476 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
477 | strncat(consumer->subdir, default_trace_dir, |
478 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
479 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
480 | } | |
481 | ||
482 | break; | |
483 | case LTTNG_DST_PATH: | |
484 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
485 | memset(consumer->dst.trace_path, 0, | |
486 | sizeof(consumer->dst.trace_path)); | |
487 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
488 | sizeof(consumer->dst.trace_path)); | |
489 | /* Append default trace dir */ | |
490 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
491 | sizeof(consumer->dst.trace_path) - |
492 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
493 | /* Flag consumer as local. */ |
494 | consumer->type = CONSUMER_DST_LOCAL; | |
495 | break; | |
496 | } | |
497 | ||
a74934ba DG |
498 | ret = LTTNG_OK; |
499 | ||
2f77fc4b DG |
500 | error: |
501 | return ret; | |
502 | } | |
503 | ||
504 | /* | |
505 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
506 | */ | |
507 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
508 | { | |
509 | int ret = 0; | |
510 | struct lttng_ht_iter iter; | |
511 | struct consumer_socket *socket; | |
512 | ||
513 | assert(session); | |
514 | ||
e7fe706f DG |
515 | rcu_read_lock(); |
516 | ||
2f77fc4b DG |
517 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
518 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
519 | socket, node.node) { | |
2f77fc4b | 520 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 521 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
522 | pthread_mutex_unlock(socket->lock); |
523 | if (ret < 0) { | |
f73fabfd | 524 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
525 | goto error; |
526 | } | |
527 | } | |
528 | } | |
529 | ||
530 | error: | |
e7fe706f | 531 | rcu_read_unlock(); |
2f77fc4b DG |
532 | return ret; |
533 | } | |
534 | ||
535 | /* | |
536 | * Create a socket to the relayd using the URI. | |
537 | * | |
538 | * On success, the relayd_sock pointer is set to the created socket. | |
539 | * Else, it's stays untouched and a lttcomm error code is returned. | |
540 | */ | |
6151a90f JD |
541 | static int create_connect_relayd(struct lttng_uri *uri, |
542 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
543 | { |
544 | int ret; | |
6151a90f | 545 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 546 | |
6151a90f JD |
547 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
548 | RELAYD_VERSION_COMM_MINOR); | |
549 | if (!rsock) { | |
f73fabfd | 550 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
551 | goto error; |
552 | } | |
553 | ||
ffe60014 DG |
554 | /* |
555 | * Connect to relayd so we can proceed with a session creation. This call | |
556 | * can possibly block for an arbitrary amount of time to set the health | |
557 | * state to be in poll execution. | |
558 | */ | |
559 | health_poll_entry(); | |
6151a90f | 560 | ret = relayd_connect(rsock); |
ffe60014 | 561 | health_poll_exit(); |
2f77fc4b DG |
562 | if (ret < 0) { |
563 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 564 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
565 | goto free_sock; |
566 | } | |
567 | ||
568 | /* Create socket for control stream. */ | |
569 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
570 | DBG3("Creating relayd stream socket from URI"); | |
571 | ||
572 | /* Check relayd version */ | |
6151a90f | 573 | ret = relayd_version_check(rsock); |
2f77fc4b | 574 | if (ret < 0) { |
f73fabfd | 575 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
576 | goto close_sock; |
577 | } | |
578 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
579 | DBG3("Creating relayd data socket from URI"); | |
580 | } else { | |
581 | /* Command is not valid */ | |
582 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 583 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
584 | goto close_sock; |
585 | } | |
586 | ||
6151a90f | 587 | *relayd_sock = rsock; |
2f77fc4b | 588 | |
f73fabfd | 589 | return LTTNG_OK; |
2f77fc4b DG |
590 | |
591 | close_sock: | |
6151a90f JD |
592 | /* The returned value is not useful since we are on an error path. */ |
593 | (void) relayd_close(rsock); | |
2f77fc4b | 594 | free_sock: |
6151a90f | 595 | free(rsock); |
2f77fc4b DG |
596 | error: |
597 | return ret; | |
598 | } | |
599 | ||
600 | /* | |
601 | * Connect to the relayd using URI and send the socket to the right consumer. | |
602 | */ | |
6dc3064a | 603 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 604 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
605 | struct consumer_socket *consumer_sock, |
606 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
607 | { |
608 | int ret; | |
6151a90f | 609 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 610 | |
ffe60014 | 611 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 612 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 613 | if (ret != LTTNG_OK) { |
6151a90f | 614 | goto error; |
ffe60014 | 615 | } |
6151a90f | 616 | assert(rsock); |
ffe60014 | 617 | |
2f77fc4b | 618 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
619 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
620 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
621 | /* |
622 | * Increment net_seq_idx because we are about to transfer the | |
623 | * new relayd socket to the consumer. | |
d88aee68 | 624 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 625 | */ |
d88aee68 DG |
626 | consumer->net_seq_index = ++relayd_net_seq_idx; |
627 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
628 | } |
629 | ||
2f77fc4b | 630 | /* Send relayd socket to consumer. */ |
6151a90f | 631 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
632 | relayd_uri->stype, session_id, |
633 | session_name, hostname, session_live_timer); | |
2f77fc4b | 634 | if (ret < 0) { |
f73fabfd | 635 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
636 | goto close_sock; |
637 | } | |
638 | ||
c890b720 DG |
639 | /* Flag that the corresponding socket was sent. */ |
640 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 641 | consumer_sock->control_sock_sent = 1; |
c890b720 | 642 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 643 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
644 | } |
645 | ||
f73fabfd | 646 | ret = LTTNG_OK; |
2f77fc4b DG |
647 | |
648 | /* | |
649 | * Close socket which was dup on the consumer side. The session daemon does | |
650 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
651 | */ | |
652 | ||
653 | close_sock: | |
6151a90f JD |
654 | (void) relayd_close(rsock); |
655 | free(rsock); | |
2f77fc4b | 656 | |
6151a90f | 657 | error: |
ffe60014 DG |
658 | if (ret != LTTNG_OK) { |
659 | /* | |
d9078d0c DG |
660 | * The consumer output for this session should not be used anymore |
661 | * since the relayd connection failed thus making any tracing or/and | |
662 | * streaming not usable. | |
ffe60014 | 663 | */ |
d9078d0c | 664 | consumer->enabled = 0; |
ffe60014 | 665 | } |
2f77fc4b DG |
666 | return ret; |
667 | } | |
668 | ||
669 | /* | |
670 | * Send both relayd sockets to a specific consumer and domain. This is a | |
671 | * helper function to facilitate sending the information to the consumer for a | |
672 | * session. | |
673 | */ | |
6dc3064a | 674 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
675 | struct consumer_output *consumer, struct consumer_socket *sock, |
676 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 677 | { |
dda67f6c | 678 | int ret = LTTNG_OK; |
2f77fc4b | 679 | |
2f77fc4b | 680 | assert(consumer); |
6dc3064a | 681 | assert(sock); |
2f77fc4b | 682 | |
2f77fc4b | 683 | /* Sending control relayd socket. */ |
ffe60014 | 684 | if (!sock->control_sock_sent) { |
6dc3064a | 685 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
686 | &consumer->dst.net.control, consumer, sock, |
687 | session_name, hostname, session_live_timer); | |
c890b720 DG |
688 | if (ret != LTTNG_OK) { |
689 | goto error; | |
690 | } | |
2f77fc4b DG |
691 | } |
692 | ||
693 | /* Sending data relayd socket. */ | |
ffe60014 | 694 | if (!sock->data_sock_sent) { |
6dc3064a | 695 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
696 | &consumer->dst.net.data, consumer, sock, |
697 | session_name, hostname, session_live_timer); | |
c890b720 DG |
698 | if (ret != LTTNG_OK) { |
699 | goto error; | |
700 | } | |
2f77fc4b DG |
701 | } |
702 | ||
2f77fc4b DG |
703 | error: |
704 | return ret; | |
705 | } | |
706 | ||
707 | /* | |
708 | * Setup relayd connections for a tracing session. First creates the socket to | |
709 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
710 | * network. | |
711 | */ | |
ffe60014 | 712 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 713 | { |
f73fabfd | 714 | int ret = LTTNG_OK; |
2f77fc4b DG |
715 | struct ltt_ust_session *usess; |
716 | struct ltt_kernel_session *ksess; | |
717 | struct consumer_socket *socket; | |
718 | struct lttng_ht_iter iter; | |
719 | ||
720 | assert(session); | |
721 | ||
722 | usess = session->ust_session; | |
723 | ksess = session->kernel_session; | |
724 | ||
785d2d0d | 725 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 726 | |
e7fe706f DG |
727 | rcu_read_lock(); |
728 | ||
2f77fc4b DG |
729 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
730 | && usess->consumer->enabled) { | |
731 | /* For each consumer socket, send relayd sockets */ | |
732 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
733 | socket, node.node) { | |
2f77fc4b | 734 | pthread_mutex_lock(socket->lock); |
6dc3064a | 735 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
736 | usess->consumer, socket, |
737 | session->name, session->hostname, | |
738 | session->live_timer); | |
2f77fc4b | 739 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 740 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
741 | goto error; |
742 | } | |
6dc3064a DG |
743 | /* Session is now ready for network streaming. */ |
744 | session->net_handle = 1; | |
2f77fc4b DG |
745 | } |
746 | } | |
747 | ||
748 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
749 | && ksess->consumer->enabled) { | |
750 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
751 | socket, node.node) { | |
2f77fc4b | 752 | pthread_mutex_lock(socket->lock); |
6dc3064a | 753 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
754 | ksess->consumer, socket, |
755 | session->name, session->hostname, | |
756 | session->live_timer); | |
2f77fc4b | 757 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 758 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
759 | goto error; |
760 | } | |
6dc3064a DG |
761 | /* Session is now ready for network streaming. */ |
762 | session->net_handle = 1; | |
2f77fc4b DG |
763 | } |
764 | } | |
765 | ||
766 | error: | |
e7fe706f | 767 | rcu_read_unlock(); |
2f77fc4b DG |
768 | return ret; |
769 | } | |
770 | ||
9b6c7ec5 DG |
771 | /* |
772 | * Start a kernel session by opening all necessary streams. | |
773 | */ | |
774 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
775 | { | |
776 | int ret; | |
777 | struct ltt_kernel_channel *kchan; | |
778 | ||
779 | /* Open kernel metadata */ | |
07b86b52 | 780 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
781 | ret = kernel_open_metadata(ksess); |
782 | if (ret < 0) { | |
783 | ret = LTTNG_ERR_KERN_META_FAIL; | |
784 | goto error; | |
785 | } | |
786 | } | |
787 | ||
788 | /* Open kernel metadata stream */ | |
07b86b52 | 789 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
790 | ret = kernel_open_metadata_stream(ksess); |
791 | if (ret < 0) { | |
792 | ERR("Kernel create metadata stream failed"); | |
793 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
794 | goto error; | |
795 | } | |
796 | } | |
797 | ||
798 | /* For each channel */ | |
799 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
800 | if (kchan->stream_count == 0) { | |
801 | ret = kernel_open_channel_stream(kchan); | |
802 | if (ret < 0) { | |
803 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
804 | goto error; | |
805 | } | |
806 | /* Update the stream global counter */ | |
807 | ksess->stream_count_global += ret; | |
808 | } | |
809 | } | |
810 | ||
811 | /* Setup kernel consumer socket and send fds to it */ | |
812 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 813 | if (ret != 0) { |
9b6c7ec5 DG |
814 | ret = LTTNG_ERR_KERN_START_FAIL; |
815 | goto error; | |
816 | } | |
817 | ||
818 | /* This start the kernel tracing */ | |
819 | ret = kernel_start_session(ksess); | |
820 | if (ret < 0) { | |
821 | ret = LTTNG_ERR_KERN_START_FAIL; | |
822 | goto error; | |
823 | } | |
824 | ||
825 | /* Quiescent wait after starting trace */ | |
784303b0 | 826 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 827 | |
14fb1ebe | 828 | ksess->active = 1; |
9b6c7ec5 DG |
829 | |
830 | ret = LTTNG_OK; | |
831 | ||
832 | error: | |
833 | return ret; | |
834 | } | |
835 | ||
2f77fc4b DG |
836 | /* |
837 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
838 | */ | |
839 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
840 | char *channel_name) | |
841 | { | |
842 | int ret; | |
843 | struct ltt_ust_session *usess; | |
844 | ||
845 | usess = session->ust_session; | |
846 | ||
2223c96f DG |
847 | rcu_read_lock(); |
848 | ||
2f77fc4b DG |
849 | switch (domain) { |
850 | case LTTNG_DOMAIN_KERNEL: | |
851 | { | |
852 | ret = channel_kernel_disable(session->kernel_session, | |
853 | channel_name); | |
f73fabfd | 854 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
855 | goto error; |
856 | } | |
857 | ||
858 | kernel_wait_quiescent(kernel_tracer_fd); | |
859 | break; | |
860 | } | |
861 | case LTTNG_DOMAIN_UST: | |
862 | { | |
863 | struct ltt_ust_channel *uchan; | |
864 | struct lttng_ht *chan_ht; | |
865 | ||
866 | chan_ht = usess->domain_global.channels; | |
867 | ||
868 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
869 | if (uchan == NULL) { | |
f73fabfd | 870 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
871 | goto error; |
872 | } | |
873 | ||
7972aab2 | 874 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 875 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
876 | goto error; |
877 | } | |
878 | break; | |
879 | } | |
880 | #if 0 | |
881 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
882 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
883 | case LTTNG_DOMAIN_UST_PID: | |
884 | #endif | |
885 | default: | |
f73fabfd | 886 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
887 | goto error; |
888 | } | |
889 | ||
f73fabfd | 890 | ret = LTTNG_OK; |
2f77fc4b DG |
891 | |
892 | error: | |
2223c96f | 893 | rcu_read_unlock(); |
2f77fc4b DG |
894 | return ret; |
895 | } | |
896 | ||
897 | /* | |
898 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
899 | * | |
900 | * The wpipe arguments is used as a notifier for the kernel thread. | |
901 | */ | |
902 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 903 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
904 | { |
905 | int ret; | |
906 | struct ltt_ust_session *usess = session->ust_session; | |
907 | struct lttng_ht *chan_ht; | |
908 | ||
909 | assert(session); | |
910 | assert(attr); | |
7972aab2 | 911 | assert(domain); |
2f77fc4b DG |
912 | |
913 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
914 | ||
03b4fdcf DG |
915 | rcu_read_lock(); |
916 | ||
ecc48a90 JD |
917 | /* |
918 | * Don't try to enable a channel if the session has been started at | |
919 | * some point in time before. The tracer does not allow it. | |
920 | */ | |
8382cf6f | 921 | if (session->has_been_started) { |
ecc48a90 JD |
922 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
923 | goto error; | |
924 | } | |
925 | ||
926 | /* | |
927 | * If the session is a live session, remove the switch timer, the | |
928 | * live timer does the same thing but sends also synchronisation | |
929 | * beacons for inactive streams. | |
930 | */ | |
931 | if (session->live_timer > 0) { | |
932 | attr->attr.live_timer_interval = session->live_timer; | |
933 | attr->attr.switch_timer_interval = 0; | |
934 | } | |
935 | ||
33fbd469 DG |
936 | /* |
937 | * The ringbuffer (both in user space and kernel) behave badly in overwrite | |
938 | * mode and with less than 2 subbuf so block it right away and send back an | |
939 | * invalid attribute error. | |
940 | */ | |
941 | if (attr->attr.overwrite && attr->attr.num_subbuf < 2) { | |
942 | ret = LTTNG_ERR_INVALID; | |
943 | goto error; | |
944 | } | |
945 | ||
7972aab2 | 946 | switch (domain->type) { |
2f77fc4b DG |
947 | case LTTNG_DOMAIN_KERNEL: |
948 | { | |
949 | struct ltt_kernel_channel *kchan; | |
950 | ||
2f77fc4b DG |
951 | kchan = trace_kernel_get_channel_by_name(attr->name, |
952 | session->kernel_session); | |
953 | if (kchan == NULL) { | |
954 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
955 | if (attr->name[0] != '\0') { |
956 | session->kernel_session->has_non_default_channel = 1; | |
957 | } | |
2f77fc4b DG |
958 | } else { |
959 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
960 | } | |
961 | ||
f73fabfd | 962 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
963 | goto error; |
964 | } | |
965 | ||
784303b0 | 966 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
967 | break; |
968 | } | |
969 | case LTTNG_DOMAIN_UST: | |
970 | { | |
971 | struct ltt_ust_channel *uchan; | |
972 | ||
973 | chan_ht = usess->domain_global.channels; | |
974 | ||
975 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
976 | if (uchan == NULL) { | |
7972aab2 | 977 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
978 | if (attr->name[0] != '\0') { |
979 | usess->has_non_default_channel = 1; | |
980 | } | |
2f77fc4b | 981 | } else { |
7972aab2 | 982 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
983 | } |
984 | break; | |
985 | } | |
2f77fc4b | 986 | default: |
f73fabfd | 987 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
988 | goto error; |
989 | } | |
990 | ||
991 | error: | |
2223c96f | 992 | rcu_read_unlock(); |
2f77fc4b DG |
993 | return ret; |
994 | } | |
995 | ||
996 | ||
997 | /* | |
998 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
999 | */ | |
1000 | int cmd_disable_event(struct ltt_session *session, int domain, | |
1001 | char *channel_name, char *event_name) | |
1002 | { | |
1003 | int ret; | |
1004 | ||
2223c96f DG |
1005 | rcu_read_lock(); |
1006 | ||
2f77fc4b DG |
1007 | switch (domain) { |
1008 | case LTTNG_DOMAIN_KERNEL: | |
1009 | { | |
1010 | struct ltt_kernel_channel *kchan; | |
1011 | struct ltt_kernel_session *ksess; | |
1012 | ||
1013 | ksess = session->kernel_session; | |
1014 | ||
85076754 MD |
1015 | /* |
1016 | * If a non-default channel has been created in the | |
1017 | * session, explicitely require that -c chan_name needs | |
1018 | * to be provided. | |
1019 | */ | |
1020 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1021 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1022 | goto error; | |
1023 | } | |
1024 | ||
2f77fc4b DG |
1025 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1026 | if (kchan == NULL) { | |
f73fabfd | 1027 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1028 | goto error; |
1029 | } | |
1030 | ||
d3a56674 | 1031 | ret = event_kernel_disable_tracepoint(kchan, event_name); |
f73fabfd | 1032 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1033 | goto error; |
1034 | } | |
1035 | ||
1036 | kernel_wait_quiescent(kernel_tracer_fd); | |
1037 | break; | |
1038 | } | |
1039 | case LTTNG_DOMAIN_UST: | |
1040 | { | |
1041 | struct ltt_ust_channel *uchan; | |
1042 | struct ltt_ust_session *usess; | |
1043 | ||
1044 | usess = session->ust_session; | |
1045 | ||
85076754 MD |
1046 | /* |
1047 | * If a non-default channel has been created in the | |
1048 | * session, explicitely require that -c chan_name needs | |
1049 | * to be provided. | |
1050 | */ | |
1051 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1052 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1053 | goto error; | |
1054 | } | |
1055 | ||
2f77fc4b DG |
1056 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1057 | channel_name); | |
1058 | if (uchan == NULL) { | |
f73fabfd | 1059 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1060 | goto error; |
1061 | } | |
1062 | ||
7972aab2 | 1063 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); |
f73fabfd | 1064 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1065 | goto error; |
1066 | } | |
1067 | ||
1068 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1069 | channel_name); | |
1070 | break; | |
1071 | } | |
f20baf8e DG |
1072 | case LTTNG_DOMAIN_JUL: |
1073 | { | |
1074 | struct ltt_ust_session *usess = session->ust_session; | |
1075 | ||
1076 | assert(usess); | |
1077 | ||
1078 | ret = event_jul_disable(usess, event_name); | |
1079 | if (ret != LTTNG_OK) { | |
1080 | goto error; | |
1081 | } | |
1082 | ||
1083 | break; | |
1084 | } | |
2f77fc4b DG |
1085 | #if 0 |
1086 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1087 | case LTTNG_DOMAIN_UST_PID: | |
1088 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1089 | #endif | |
1090 | default: | |
f73fabfd | 1091 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1092 | goto error; |
1093 | } | |
1094 | ||
f73fabfd | 1095 | ret = LTTNG_OK; |
2f77fc4b DG |
1096 | |
1097 | error: | |
2223c96f | 1098 | rcu_read_unlock(); |
2f77fc4b DG |
1099 | return ret; |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
1104 | */ | |
1105 | int cmd_disable_event_all(struct ltt_session *session, int domain, | |
1106 | char *channel_name) | |
1107 | { | |
1108 | int ret; | |
1109 | ||
2223c96f DG |
1110 | rcu_read_lock(); |
1111 | ||
2f77fc4b DG |
1112 | switch (domain) { |
1113 | case LTTNG_DOMAIN_KERNEL: | |
1114 | { | |
1115 | struct ltt_kernel_session *ksess; | |
1116 | struct ltt_kernel_channel *kchan; | |
1117 | ||
1118 | ksess = session->kernel_session; | |
1119 | ||
85076754 MD |
1120 | /* |
1121 | * If a non-default channel has been created in the | |
1122 | * session, explicitely require that -c chan_name needs | |
1123 | * to be provided. | |
1124 | */ | |
1125 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1126 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1127 | goto error; | |
1128 | } | |
1129 | ||
2f77fc4b DG |
1130 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1131 | if (kchan == NULL) { | |
f73fabfd | 1132 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1133 | goto error; |
1134 | } | |
1135 | ||
d3a56674 | 1136 | ret = event_kernel_disable_all(kchan); |
f73fabfd | 1137 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1138 | goto error; |
1139 | } | |
1140 | ||
1141 | kernel_wait_quiescent(kernel_tracer_fd); | |
1142 | break; | |
1143 | } | |
1144 | case LTTNG_DOMAIN_UST: | |
1145 | { | |
1146 | struct ltt_ust_session *usess; | |
1147 | struct ltt_ust_channel *uchan; | |
1148 | ||
1149 | usess = session->ust_session; | |
1150 | ||
85076754 MD |
1151 | /* |
1152 | * If a non-default channel has been created in the | |
1153 | * session, explicitely require that -c chan_name needs | |
1154 | * to be provided. | |
1155 | */ | |
1156 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1157 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1158 | goto error; | |
1159 | } | |
1160 | ||
2f77fc4b DG |
1161 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1162 | channel_name); | |
1163 | if (uchan == NULL) { | |
f73fabfd | 1164 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1165 | goto error; |
1166 | } | |
1167 | ||
7972aab2 | 1168 | ret = event_ust_disable_all_tracepoints(usess, uchan); |
2f77fc4b DG |
1169 | if (ret != 0) { |
1170 | goto error; | |
1171 | } | |
1172 | ||
1173 | DBG3("Disable all UST events in channel %s completed", channel_name); | |
1174 | ||
f20baf8e DG |
1175 | break; |
1176 | } | |
1177 | case LTTNG_DOMAIN_JUL: | |
1178 | { | |
1179 | struct ltt_ust_session *usess = session->ust_session; | |
1180 | ||
1181 | assert(usess); | |
1182 | ||
1183 | ret = event_jul_disable_all(usess); | |
1184 | if (ret != LTTNG_OK) { | |
1185 | goto error; | |
1186 | } | |
1187 | ||
2f77fc4b DG |
1188 | break; |
1189 | } | |
1190 | #if 0 | |
1191 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1192 | case LTTNG_DOMAIN_UST_PID: | |
1193 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1194 | #endif | |
1195 | default: | |
f73fabfd | 1196 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1197 | goto error; |
1198 | } | |
1199 | ||
f73fabfd | 1200 | ret = LTTNG_OK; |
2f77fc4b DG |
1201 | |
1202 | error: | |
2223c96f | 1203 | rcu_read_unlock(); |
2f77fc4b DG |
1204 | return ret; |
1205 | } | |
1206 | ||
1207 | /* | |
1208 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1209 | */ | |
1210 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1211 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1212 | { |
d5979e4a | 1213 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1214 | |
1215 | switch (domain) { | |
1216 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1217 | assert(session->kernel_session); |
1218 | ||
1219 | if (session->kernel_session->channel_count == 0) { | |
1220 | /* Create default channel */ | |
1221 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1222 | if (ret != LTTNG_OK) { | |
1223 | goto error; | |
1224 | } | |
d5979e4a | 1225 | chan_kern_created = 1; |
979e618e | 1226 | } |
2f77fc4b | 1227 | /* Add kernel context to kernel tracer */ |
601d5acf | 1228 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1229 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1230 | goto error; |
1231 | } | |
1232 | break; | |
1233 | case LTTNG_DOMAIN_UST: | |
1234 | { | |
1235 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1236 | unsigned int chan_count; |
1237 | ||
2f77fc4b DG |
1238 | assert(usess); |
1239 | ||
85076754 | 1240 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1241 | if (chan_count == 0) { |
1242 | struct lttng_channel *attr; | |
1243 | /* Create default channel */ | |
0a9c6494 | 1244 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1245 | if (attr == NULL) { |
1246 | ret = LTTNG_ERR_FATAL; | |
1247 | goto error; | |
1248 | } | |
1249 | ||
7972aab2 | 1250 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1251 | if (ret != LTTNG_OK) { |
1252 | free(attr); | |
1253 | goto error; | |
1254 | } | |
1255 | free(attr); | |
d5979e4a | 1256 | chan_ust_created = 1; |
979e618e DG |
1257 | } |
1258 | ||
601d5acf | 1259 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1260 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1261 | goto error; |
1262 | } | |
1263 | break; | |
1264 | } | |
1265 | #if 0 | |
1266 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1267 | case LTTNG_DOMAIN_UST_PID: | |
1268 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1269 | #endif | |
1270 | default: | |
f73fabfd | 1271 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1272 | goto error; |
1273 | } | |
1274 | ||
d5979e4a | 1275 | return LTTNG_OK; |
2f77fc4b DG |
1276 | |
1277 | error: | |
d5979e4a DG |
1278 | if (chan_kern_created) { |
1279 | struct ltt_kernel_channel *kchan = | |
1280 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1281 | session->kernel_session); | |
1282 | /* Created previously, this should NOT fail. */ | |
1283 | assert(kchan); | |
1284 | kernel_destroy_channel(kchan); | |
1285 | } | |
1286 | ||
1287 | if (chan_ust_created) { | |
1288 | struct ltt_ust_channel *uchan = | |
1289 | trace_ust_find_channel_by_name( | |
1290 | session->ust_session->domain_global.channels, | |
1291 | DEFAULT_CHANNEL_NAME); | |
1292 | /* Created previously, this should NOT fail. */ | |
1293 | assert(uchan); | |
1294 | /* Remove from the channel list of the session. */ | |
1295 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1296 | uchan); | |
1297 | trace_ust_destroy_channel(uchan); | |
1298 | } | |
2f77fc4b DG |
1299 | return ret; |
1300 | } | |
1301 | ||
2f77fc4b DG |
1302 | /* |
1303 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1304 | */ | |
7972aab2 | 1305 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 | 1306 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1307 | char *filter_expression, |
db8f1377 JI |
1308 | struct lttng_filter_bytecode *filter, |
1309 | struct lttng_event_exclusion *exclusion, | |
1310 | int wpipe) | |
2f77fc4b | 1311 | { |
e5f5db7f | 1312 | int ret, channel_created = 0; |
2f77fc4b DG |
1313 | struct lttng_channel *attr; |
1314 | ||
1315 | assert(session); | |
1316 | assert(event); | |
1317 | assert(channel_name); | |
1318 | ||
2223c96f DG |
1319 | rcu_read_lock(); |
1320 | ||
7972aab2 | 1321 | switch (domain->type) { |
2f77fc4b DG |
1322 | case LTTNG_DOMAIN_KERNEL: |
1323 | { | |
1324 | struct ltt_kernel_channel *kchan; | |
1325 | ||
85076754 MD |
1326 | /* |
1327 | * If a non-default channel has been created in the | |
1328 | * session, explicitely require that -c chan_name needs | |
1329 | * to be provided. | |
1330 | */ | |
1331 | if (session->kernel_session->has_non_default_channel | |
1332 | && channel_name[0] == '\0') { | |
1333 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1334 | goto error; | |
1335 | } | |
1336 | ||
2f77fc4b DG |
1337 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1338 | session->kernel_session); | |
1339 | if (kchan == NULL) { | |
0a9c6494 DG |
1340 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1341 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1342 | if (attr == NULL) { |
f73fabfd | 1343 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1344 | goto error; |
1345 | } | |
1346 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1347 | ||
1348 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1349 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1350 | free(attr); |
1351 | goto error; | |
1352 | } | |
1353 | free(attr); | |
e5f5db7f DG |
1354 | |
1355 | channel_created = 1; | |
2f77fc4b DG |
1356 | } |
1357 | ||
1358 | /* Get the newly created kernel channel pointer */ | |
1359 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1360 | session->kernel_session); | |
1361 | if (kchan == NULL) { | |
1362 | /* This sould not happen... */ | |
f73fabfd | 1363 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1364 | goto error; |
1365 | } | |
1366 | ||
d3a56674 | 1367 | ret = event_kernel_enable_tracepoint(kchan, event); |
f73fabfd | 1368 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1369 | if (channel_created) { |
1370 | /* Let's not leak a useless channel. */ | |
1371 | kernel_destroy_channel(kchan); | |
1372 | } | |
2f77fc4b DG |
1373 | goto error; |
1374 | } | |
1375 | ||
1376 | kernel_wait_quiescent(kernel_tracer_fd); | |
1377 | break; | |
1378 | } | |
1379 | case LTTNG_DOMAIN_UST: | |
1380 | { | |
1381 | struct ltt_ust_channel *uchan; | |
1382 | struct ltt_ust_session *usess = session->ust_session; | |
1383 | ||
1384 | assert(usess); | |
1385 | ||
85076754 MD |
1386 | /* |
1387 | * If a non-default channel has been created in the | |
1388 | * session, explicitely require that -c chan_name needs | |
1389 | * to be provided. | |
1390 | */ | |
1391 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1392 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1393 | goto error; | |
1394 | } | |
1395 | ||
2f77fc4b DG |
1396 | /* Get channel from global UST domain */ |
1397 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1398 | channel_name); | |
1399 | if (uchan == NULL) { | |
1400 | /* Create default channel */ | |
0a9c6494 DG |
1401 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1402 | usess->buffer_type); | |
2f77fc4b | 1403 | if (attr == NULL) { |
f73fabfd | 1404 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1405 | goto error; |
1406 | } | |
1407 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1408 | ||
1409 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1410 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1411 | free(attr); |
1412 | goto error; | |
1413 | } | |
1414 | free(attr); | |
1415 | ||
1416 | /* Get the newly created channel reference back */ | |
1417 | uchan = trace_ust_find_channel_by_name( | |
1418 | usess->domain_global.channels, channel_name); | |
1419 | assert(uchan); | |
1420 | } | |
1421 | ||
1422 | /* At this point, the session and channel exist on the tracer */ | |
6b453b5e JG |
1423 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
1424 | filter_expression, filter, exclusion); | |
f73fabfd | 1425 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1426 | goto error; |
1427 | } | |
1428 | break; | |
1429 | } | |
f20baf8e DG |
1430 | case LTTNG_DOMAIN_JUL: |
1431 | { | |
1432 | struct lttng_event uevent; | |
1433 | struct lttng_domain tmp_dom; | |
1434 | struct ltt_ust_session *usess = session->ust_session; | |
1435 | ||
1436 | assert(usess); | |
1437 | ||
1438 | /* Create the default JUL tracepoint. */ | |
996de3c7 | 1439 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
1440 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1441 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
f43f95a9 DG |
1442 | if (is_root) { |
1443 | strncpy(uevent.name, DEFAULT_SYS_JUL_EVENT_NAME, | |
1444 | sizeof(uevent.name)); | |
1445 | } else { | |
1446 | strncpy(uevent.name, DEFAULT_USER_JUL_EVENT_NAME, | |
1447 | sizeof(uevent.name)); | |
1448 | } | |
f20baf8e DG |
1449 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1450 | ||
1451 | /* | |
1452 | * The domain type is changed because we are about to enable the | |
1453 | * default channel and event for the JUL domain that are hardcoded. | |
1454 | * This happens in the UST domain. | |
1455 | */ | |
1456 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1457 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1458 | ||
1459 | ret = cmd_enable_event(session, &tmp_dom, DEFAULT_JUL_CHANNEL_NAME, | |
9b21e6d5 | 1460 | &uevent, filter_expression, filter, NULL, wpipe); |
f20baf8e DG |
1461 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1462 | goto error; | |
1463 | } | |
1464 | ||
1465 | /* The wild card * means that everything should be enabled. */ | |
1466 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
b2064f54 | 1467 | ret = event_jul_enable_all(usess, event); |
f20baf8e DG |
1468 | } else { |
1469 | ret = event_jul_enable(usess, event); | |
1470 | } | |
1471 | if (ret != LTTNG_OK) { | |
1472 | goto error; | |
1473 | } | |
1474 | ||
1475 | break; | |
1476 | } | |
2f77fc4b DG |
1477 | #if 0 |
1478 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1479 | case LTTNG_DOMAIN_UST_PID: | |
1480 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1481 | #endif | |
1482 | default: | |
f73fabfd | 1483 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1484 | goto error; |
1485 | } | |
1486 | ||
f73fabfd | 1487 | ret = LTTNG_OK; |
2f77fc4b DG |
1488 | |
1489 | error: | |
2223c96f | 1490 | rcu_read_unlock(); |
2f77fc4b DG |
1491 | return ret; |
1492 | } | |
1493 | ||
1494 | /* | |
1495 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
1496 | */ | |
7972aab2 DG |
1497 | int cmd_enable_event_all(struct ltt_session *session, |
1498 | struct lttng_domain *domain, char *channel_name, int event_type, | |
6b453b5e | 1499 | char *filter_expression, |
025faf73 | 1500 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1501 | { |
1502 | int ret; | |
1503 | struct lttng_channel *attr; | |
1504 | ||
1505 | assert(session); | |
1506 | assert(channel_name); | |
1507 | ||
2223c96f DG |
1508 | rcu_read_lock(); |
1509 | ||
7972aab2 | 1510 | switch (domain->type) { |
2f77fc4b DG |
1511 | case LTTNG_DOMAIN_KERNEL: |
1512 | { | |
1513 | struct ltt_kernel_channel *kchan; | |
1514 | ||
1515 | assert(session->kernel_session); | |
1516 | ||
85076754 MD |
1517 | /* |
1518 | * If a non-default channel has been created in the | |
1519 | * session, explicitely require that -c chan_name needs | |
1520 | * to be provided. | |
1521 | */ | |
1522 | if (session->kernel_session->has_non_default_channel | |
1523 | && channel_name[0] == '\0') { | |
1524 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1525 | goto error; | |
1526 | } | |
1527 | ||
2f77fc4b DG |
1528 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1529 | session->kernel_session); | |
1530 | if (kchan == NULL) { | |
1531 | /* Create default channel */ | |
0a9c6494 DG |
1532 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1533 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1534 | if (attr == NULL) { |
f73fabfd | 1535 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1536 | goto error; |
1537 | } | |
1538 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1539 | ||
1540 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1541 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1542 | free(attr); |
1543 | goto error; | |
1544 | } | |
1545 | free(attr); | |
1546 | ||
1547 | /* Get the newly created kernel channel pointer */ | |
1548 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1549 | session->kernel_session); | |
1550 | assert(kchan); | |
1551 | } | |
1552 | ||
1553 | switch (event_type) { | |
1554 | case LTTNG_EVENT_SYSCALL: | |
d3a56674 | 1555 | ret = event_kernel_enable_all_syscalls(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1556 | break; |
1557 | case LTTNG_EVENT_TRACEPOINT: | |
1558 | /* | |
1559 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1560 | * events already registered to the channel. | |
1561 | */ | |
d3a56674 | 1562 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1563 | break; |
1564 | case LTTNG_EVENT_ALL: | |
1565 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1566 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1567 | break; |
1568 | default: | |
f73fabfd | 1569 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1570 | goto error; |
1571 | } | |
1572 | ||
1573 | /* Manage return value */ | |
f73fabfd | 1574 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1575 | /* |
1576 | * On error, cmd_enable_channel call will take care of destroying | |
1577 | * the created channel if it was needed. | |
1578 | */ | |
2f77fc4b DG |
1579 | goto error; |
1580 | } | |
1581 | ||
1582 | kernel_wait_quiescent(kernel_tracer_fd); | |
1583 | break; | |
1584 | } | |
1585 | case LTTNG_DOMAIN_UST: | |
1586 | { | |
1587 | struct ltt_ust_channel *uchan; | |
1588 | struct ltt_ust_session *usess = session->ust_session; | |
1589 | ||
1590 | assert(usess); | |
1591 | ||
85076754 MD |
1592 | /* |
1593 | * If a non-default channel has been created in the | |
1594 | * session, explicitely require that -c chan_name needs | |
1595 | * to be provided. | |
1596 | */ | |
1597 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1598 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1599 | goto error; | |
1600 | } | |
1601 | ||
2f77fc4b DG |
1602 | /* Get channel from global UST domain */ |
1603 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1604 | channel_name); | |
1605 | if (uchan == NULL) { | |
1606 | /* Create default channel */ | |
0a9c6494 DG |
1607 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1608 | usess->buffer_type); | |
2f77fc4b | 1609 | if (attr == NULL) { |
f73fabfd | 1610 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1611 | goto error; |
1612 | } | |
1613 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1614 | ||
1615 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1616 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1617 | free(attr); |
1618 | goto error; | |
1619 | } | |
1620 | free(attr); | |
1621 | ||
1622 | /* Get the newly created channel reference back */ | |
1623 | uchan = trace_ust_find_channel_by_name( | |
1624 | usess->domain_global.channels, channel_name); | |
1625 | assert(uchan); | |
1626 | } | |
1627 | ||
1628 | /* At this point, the session and channel exist on the tracer */ | |
1629 | ||
1630 | switch (event_type) { | |
1631 | case LTTNG_EVENT_ALL: | |
1632 | case LTTNG_EVENT_TRACEPOINT: | |
6b453b5e JG |
1633 | ret = event_ust_enable_all_tracepoints(usess, uchan, |
1634 | filter_expression, filter); | |
f73fabfd | 1635 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1636 | goto error; |
1637 | } | |
1638 | break; | |
1639 | default: | |
f73fabfd | 1640 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
2f77fc4b DG |
1641 | goto error; |
1642 | } | |
1643 | ||
1644 | /* Manage return value */ | |
f73fabfd | 1645 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1646 | goto error; |
1647 | } | |
1648 | ||
f20baf8e DG |
1649 | break; |
1650 | } | |
1651 | case LTTNG_DOMAIN_JUL: | |
1652 | { | |
b2064f54 | 1653 | struct lttng_event uevent, event; |
f20baf8e DG |
1654 | struct lttng_domain tmp_dom; |
1655 | struct ltt_ust_session *usess = session->ust_session; | |
1656 | ||
1657 | assert(usess); | |
1658 | ||
1659 | /* Create the default JUL tracepoint. */ | |
1660 | uevent.type = LTTNG_EVENT_TRACEPOINT; | |
1661 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
f43f95a9 DG |
1662 | if (is_root) { |
1663 | strncpy(uevent.name, DEFAULT_SYS_JUL_EVENT_NAME, | |
1664 | sizeof(uevent.name)); | |
1665 | } else { | |
1666 | strncpy(uevent.name, DEFAULT_USER_JUL_EVENT_NAME, | |
1667 | sizeof(uevent.name)); | |
1668 | } | |
f20baf8e DG |
1669 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1670 | ||
1671 | /* | |
1672 | * The domain type is changed because we are about to enable the | |
1673 | * default channel and event for the JUL domain that are hardcoded. | |
1674 | * This happens in the UST domain. | |
1675 | */ | |
1676 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1677 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1678 | ||
1679 | ret = cmd_enable_event(session, &tmp_dom, DEFAULT_JUL_CHANNEL_NAME, | |
6b453b5e | 1680 | &uevent, NULL, NULL, NULL, wpipe); |
f20baf8e DG |
1681 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1682 | goto error; | |
1683 | } | |
1684 | ||
b2064f54 DG |
1685 | event.loglevel = LTTNG_LOGLEVEL_JUL_ALL; |
1686 | event.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
1687 | strncpy(event.name, "*", sizeof(event.name)); | |
1688 | event.name[sizeof(event.name) - 1] = '\0'; | |
1689 | ||
1690 | ret = event_jul_enable_all(usess, &event); | |
f20baf8e DG |
1691 | if (ret != LTTNG_OK) { |
1692 | goto error; | |
1693 | } | |
1694 | ||
2f77fc4b DG |
1695 | break; |
1696 | } | |
1697 | #if 0 | |
1698 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1699 | case LTTNG_DOMAIN_UST_PID: | |
1700 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1701 | #endif | |
1702 | default: | |
f73fabfd | 1703 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1704 | goto error; |
1705 | } | |
1706 | ||
f73fabfd | 1707 | ret = LTTNG_OK; |
2f77fc4b DG |
1708 | |
1709 | error: | |
2223c96f | 1710 | rcu_read_unlock(); |
2f77fc4b DG |
1711 | return ret; |
1712 | } | |
1713 | ||
1714 | ||
1715 | /* | |
1716 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1717 | */ | |
1718 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1719 | { | |
1720 | int ret; | |
1721 | ssize_t nb_events = 0; | |
1722 | ||
1723 | switch (domain) { | |
1724 | case LTTNG_DOMAIN_KERNEL: | |
1725 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1726 | if (nb_events < 0) { | |
f73fabfd | 1727 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1728 | goto error; |
1729 | } | |
1730 | break; | |
1731 | case LTTNG_DOMAIN_UST: | |
1732 | nb_events = ust_app_list_events(events); | |
1733 | if (nb_events < 0) { | |
f73fabfd | 1734 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1735 | goto error; |
1736 | } | |
1737 | break; | |
3c6a091f DG |
1738 | case LTTNG_DOMAIN_JUL: |
1739 | nb_events = jul_list_events(events); | |
1740 | if (nb_events < 0) { | |
1741 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1742 | goto error; | |
1743 | } | |
1744 | break; | |
2f77fc4b | 1745 | default: |
f73fabfd | 1746 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1747 | goto error; |
1748 | } | |
1749 | ||
1750 | return nb_events; | |
1751 | ||
1752 | error: | |
1753 | /* Return negative value to differentiate return code */ | |
1754 | return -ret; | |
1755 | } | |
1756 | ||
1757 | /* | |
1758 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1759 | */ | |
1760 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1761 | struct lttng_event_field **fields) | |
1762 | { | |
1763 | int ret; | |
1764 | ssize_t nb_fields = 0; | |
1765 | ||
1766 | switch (domain) { | |
1767 | case LTTNG_DOMAIN_UST: | |
1768 | nb_fields = ust_app_list_event_fields(fields); | |
1769 | if (nb_fields < 0) { | |
f73fabfd | 1770 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1771 | goto error; |
1772 | } | |
1773 | break; | |
1774 | case LTTNG_DOMAIN_KERNEL: | |
1775 | default: /* fall-through */ | |
f73fabfd | 1776 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1777 | goto error; |
1778 | } | |
1779 | ||
1780 | return nb_fields; | |
1781 | ||
1782 | error: | |
1783 | /* Return negative value to differentiate return code */ | |
1784 | return -ret; | |
1785 | } | |
1786 | ||
1787 | /* | |
1788 | * Command LTTNG_START_TRACE processed by the client thread. | |
1789 | */ | |
1790 | int cmd_start_trace(struct ltt_session *session) | |
1791 | { | |
1792 | int ret; | |
cde3e505 | 1793 | unsigned long nb_chan = 0; |
2f77fc4b DG |
1794 | struct ltt_kernel_session *ksession; |
1795 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1796 | |
1797 | assert(session); | |
1798 | ||
1799 | /* Ease our life a bit ;) */ | |
1800 | ksession = session->kernel_session; | |
1801 | usess = session->ust_session; | |
1802 | ||
8382cf6f DG |
1803 | /* Is the session already started? */ |
1804 | if (session->active) { | |
f73fabfd | 1805 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1806 | goto error; |
1807 | } | |
1808 | ||
cde3e505 DG |
1809 | /* |
1810 | * Starting a session without channel is useless since after that it's not | |
1811 | * possible to enable channel thus inform the client. | |
1812 | */ | |
1813 | if (usess && usess->domain_global.channels) { | |
1814 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
1815 | } | |
1816 | if (ksession) { | |
1817 | nb_chan += ksession->channel_count; | |
1818 | } | |
1819 | if (!nb_chan) { | |
1820 | ret = LTTNG_ERR_NO_CHANNEL; | |
1821 | goto error; | |
1822 | } | |
1823 | ||
2f77fc4b DG |
1824 | /* Kernel tracing */ |
1825 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1826 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1827 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1828 | goto error; |
1829 | } | |
2f77fc4b DG |
1830 | } |
1831 | ||
1832 | /* Flag session that trace should start automatically */ | |
1833 | if (usess) { | |
14fb1ebe DG |
1834 | /* |
1835 | * Even though the start trace might fail, flag this session active so | |
1836 | * other application coming in are started by default. | |
1837 | */ | |
1838 | usess->active = 1; | |
2f77fc4b DG |
1839 | |
1840 | ret = ust_app_start_trace_all(usess); | |
1841 | if (ret < 0) { | |
f73fabfd | 1842 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1843 | goto error; |
1844 | } | |
1845 | } | |
1846 | ||
8382cf6f DG |
1847 | /* Flag this after a successful start. */ |
1848 | session->has_been_started = 1; | |
1849 | session->active = 1; | |
9b6c7ec5 | 1850 | |
f73fabfd | 1851 | ret = LTTNG_OK; |
2f77fc4b DG |
1852 | |
1853 | error: | |
1854 | return ret; | |
1855 | } | |
1856 | ||
1857 | /* | |
1858 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1859 | */ | |
1860 | int cmd_stop_trace(struct ltt_session *session) | |
1861 | { | |
1862 | int ret; | |
1863 | struct ltt_kernel_channel *kchan; | |
1864 | struct ltt_kernel_session *ksession; | |
1865 | struct ltt_ust_session *usess; | |
1866 | ||
1867 | assert(session); | |
1868 | ||
1869 | /* Short cut */ | |
1870 | ksession = session->kernel_session; | |
1871 | usess = session->ust_session; | |
1872 | ||
8382cf6f DG |
1873 | /* Session is not active. Skip everythong and inform the client. */ |
1874 | if (!session->active) { | |
f73fabfd | 1875 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1876 | goto error; |
1877 | } | |
1878 | ||
2f77fc4b | 1879 | /* Kernel tracer */ |
14fb1ebe | 1880 | if (ksession && ksession->active) { |
2f77fc4b DG |
1881 | DBG("Stop kernel tracing"); |
1882 | ||
1883 | /* Flush metadata if exist */ | |
1884 | if (ksession->metadata_stream_fd >= 0) { | |
1885 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1886 | if (ret < 0) { | |
1887 | ERR("Kernel metadata flush failed"); | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | /* Flush all buffers before stopping */ | |
1892 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1893 | ret = kernel_flush_buffer(kchan); | |
1894 | if (ret < 0) { | |
1895 | ERR("Kernel flush buffer error"); | |
1896 | } | |
1897 | } | |
1898 | ||
1899 | ret = kernel_stop_session(ksession); | |
1900 | if (ret < 0) { | |
f73fabfd | 1901 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1902 | goto error; |
1903 | } | |
1904 | ||
1905 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 | 1906 | |
14fb1ebe | 1907 | ksession->active = 0; |
2f77fc4b DG |
1908 | } |
1909 | ||
14fb1ebe DG |
1910 | if (usess && usess->active) { |
1911 | /* | |
1912 | * Even though the stop trace might fail, flag this session inactive so | |
1913 | * other application coming in are not started by default. | |
1914 | */ | |
1915 | usess->active = 0; | |
2f77fc4b DG |
1916 | |
1917 | ret = ust_app_stop_trace_all(usess); | |
1918 | if (ret < 0) { | |
f73fabfd | 1919 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1920 | goto error; |
1921 | } | |
1922 | } | |
1923 | ||
8382cf6f DG |
1924 | /* Flag inactive after a successful stop. */ |
1925 | session->active = 0; | |
f73fabfd | 1926 | ret = LTTNG_OK; |
2f77fc4b DG |
1927 | |
1928 | error: | |
1929 | return ret; | |
1930 | } | |
1931 | ||
1932 | /* | |
1933 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1934 | */ | |
1935 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1936 | size_t nb_uri, struct lttng_uri *uris) | |
1937 | { | |
1938 | int ret, i; | |
1939 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1940 | struct ltt_ust_session *usess = session->ust_session; | |
1941 | struct consumer_output *consumer = NULL; | |
1942 | ||
1943 | assert(session); | |
1944 | assert(uris); | |
1945 | assert(nb_uri > 0); | |
1946 | ||
8382cf6f DG |
1947 | /* Can't set consumer URI if the session is active. */ |
1948 | if (session->active) { | |
f73fabfd | 1949 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1950 | goto error; |
1951 | } | |
1952 | ||
2f77fc4b DG |
1953 | /* |
1954 | * This case switch makes sure the domain session has a temporary consumer | |
1955 | * so the URL can be set. | |
1956 | */ | |
1957 | switch (domain) { | |
1958 | case 0: | |
1959 | /* Code flow error. A session MUST always have a consumer object */ | |
1960 | assert(session->consumer); | |
1961 | /* | |
1962 | * The URL will be added to the tracing session consumer instead of a | |
1963 | * specific domain consumer. | |
1964 | */ | |
1965 | consumer = session->consumer; | |
1966 | break; | |
1967 | case LTTNG_DOMAIN_KERNEL: | |
1968 | /* Code flow error if we don't have a kernel session here. */ | |
1969 | assert(ksess); | |
785d2d0d DG |
1970 | assert(ksess->consumer); |
1971 | consumer = ksess->consumer; | |
2f77fc4b DG |
1972 | break; |
1973 | case LTTNG_DOMAIN_UST: | |
1974 | /* Code flow error if we don't have a kernel session here. */ | |
1975 | assert(usess); | |
785d2d0d DG |
1976 | assert(usess->consumer); |
1977 | consumer = usess->consumer; | |
2f77fc4b DG |
1978 | break; |
1979 | } | |
1980 | ||
1981 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b | 1982 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
a74934ba | 1983 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1984 | goto error; |
1985 | } | |
2f77fc4b DG |
1986 | } |
1987 | ||
1988 | /* All good! */ | |
f73fabfd | 1989 | ret = LTTNG_OK; |
2f77fc4b DG |
1990 | |
1991 | error: | |
1992 | return ret; | |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
1997 | */ | |
1998 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 1999 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2000 | { |
2001 | int ret; | |
2f77fc4b DG |
2002 | struct ltt_session *session; |
2003 | ||
2004 | assert(name); | |
2bba9e53 | 2005 | assert(creds); |
785d2d0d | 2006 | |
2f77fc4b DG |
2007 | /* |
2008 | * Verify if the session already exist | |
2009 | * | |
2010 | * XXX: There is no need for the session lock list here since the caller | |
2011 | * (process_client_msg) is holding it. We might want to change that so a | |
2012 | * single command does not lock the entire session list. | |
2013 | */ | |
2014 | session = session_find_by_name(name); | |
2015 | if (session != NULL) { | |
f73fabfd | 2016 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2017 | goto find_error; |
2018 | } | |
2019 | ||
2020 | /* Create tracing session in the registry */ | |
dec56f6c | 2021 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2022 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2023 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2024 | goto session_error; |
2025 | } | |
2026 | ||
2027 | /* | |
2028 | * Get the newly created session pointer back | |
2029 | * | |
2030 | * XXX: There is no need for the session lock list here since the caller | |
2031 | * (process_client_msg) is holding it. We might want to change that so a | |
2032 | * single command does not lock the entire session list. | |
2033 | */ | |
2034 | session = session_find_by_name(name); | |
2035 | assert(session); | |
2036 | ||
ecc48a90 | 2037 | session->live_timer = live_timer; |
2f77fc4b DG |
2038 | /* Create default consumer output for the session not yet created. */ |
2039 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2040 | if (session->consumer == NULL) { | |
f73fabfd | 2041 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2042 | goto consumer_error; |
2043 | } | |
2044 | ||
2bba9e53 DG |
2045 | if (uris) { |
2046 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
2047 | if (ret != LTTNG_OK) { | |
2048 | goto consumer_error; | |
2049 | } | |
2050 | session->output_traces = 1; | |
2051 | } else { | |
2052 | session->output_traces = 0; | |
2053 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2054 | } |
2055 | ||
2056 | session->consumer->enabled = 1; | |
2057 | ||
f73fabfd | 2058 | return LTTNG_OK; |
2f77fc4b DG |
2059 | |
2060 | consumer_error: | |
2061 | session_destroy(session); | |
2062 | session_error: | |
2063 | find_error: | |
2064 | return ret; | |
2065 | } | |
2066 | ||
27babd3a DG |
2067 | /* |
2068 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2069 | */ | |
2070 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2071 | size_t nb_uri, lttng_sock_cred *creds) | |
2072 | { | |
2073 | int ret; | |
2074 | struct ltt_session *session; | |
2075 | struct snapshot_output *new_output = NULL; | |
2076 | ||
2077 | assert(name); | |
2078 | assert(creds); | |
2079 | ||
2080 | /* | |
2081 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2082 | * received are for a default snapshot output if one. | |
2083 | */ | |
ecc48a90 | 2084 | ret = cmd_create_session_uri(name, NULL, 0, creds, -1); |
27babd3a DG |
2085 | if (ret != LTTNG_OK) { |
2086 | goto error; | |
2087 | } | |
2088 | ||
2089 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2090 | session = session_find_by_name(name); | |
2091 | assert(session); | |
2092 | ||
2093 | /* Flag session for snapshot mode. */ | |
2094 | session->snapshot_mode = 1; | |
2095 | ||
2096 | /* Skip snapshot output creation if no URI is given. */ | |
2097 | if (nb_uri == 0) { | |
2098 | goto end; | |
2099 | } | |
2100 | ||
2101 | new_output = snapshot_output_alloc(); | |
2102 | if (!new_output) { | |
2103 | ret = LTTNG_ERR_NOMEM; | |
2104 | goto error_snapshot_alloc; | |
2105 | } | |
2106 | ||
2107 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2108 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2109 | if (ret < 0) { | |
2110 | if (ret == -ENOMEM) { | |
2111 | ret = LTTNG_ERR_NOMEM; | |
2112 | } else { | |
2113 | ret = LTTNG_ERR_INVALID; | |
2114 | } | |
2115 | goto error_snapshot; | |
2116 | } | |
2117 | ||
2118 | rcu_read_lock(); | |
2119 | snapshot_add_output(&session->snapshot, new_output); | |
2120 | rcu_read_unlock(); | |
2121 | ||
2122 | end: | |
2123 | return LTTNG_OK; | |
2124 | ||
2125 | error_snapshot: | |
2126 | snapshot_output_destroy(new_output); | |
2127 | error_snapshot_alloc: | |
2128 | session_destroy(session); | |
2129 | error: | |
2130 | return ret; | |
2131 | } | |
2132 | ||
2f77fc4b DG |
2133 | /* |
2134 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2135 | */ | |
2136 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2137 | { | |
2138 | int ret; | |
2139 | struct ltt_ust_session *usess; | |
2140 | struct ltt_kernel_session *ksess; | |
2141 | ||
2142 | /* Safety net */ | |
2143 | assert(session); | |
2144 | ||
2145 | usess = session->ust_session; | |
2146 | ksess = session->kernel_session; | |
2147 | ||
2148 | /* Clean kernel session teardown */ | |
2149 | kernel_destroy_session(ksess); | |
2150 | ||
2151 | /* UST session teardown */ | |
2152 | if (usess) { | |
2153 | /* Close any relayd session */ | |
2154 | consumer_output_send_destroy_relayd(usess->consumer); | |
2155 | ||
2156 | /* Destroy every UST application related to this session. */ | |
2157 | ret = ust_app_destroy_trace_all(usess); | |
2158 | if (ret) { | |
2159 | ERR("Error in ust_app_destroy_trace_all"); | |
2160 | } | |
2161 | ||
2162 | /* Clean up the rest. */ | |
2163 | trace_ust_destroy_session(usess); | |
2164 | } | |
2165 | ||
2166 | /* | |
2167 | * Must notify the kernel thread here to update it's poll set in order to | |
2168 | * remove the channel(s)' fd just destroyed. | |
2169 | */ | |
2170 | ret = notify_thread_pipe(wpipe); | |
2171 | if (ret < 0) { | |
2172 | PERROR("write kernel poll pipe"); | |
2173 | } | |
2174 | ||
2175 | ret = session_destroy(session); | |
2176 | ||
2177 | return ret; | |
2178 | } | |
2179 | ||
2180 | /* | |
2181 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2182 | */ | |
2183 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2184 | { | |
2185 | int ret; | |
2186 | ||
2187 | switch (domain) { | |
2188 | case LTTNG_DOMAIN_KERNEL: | |
2189 | { | |
2190 | struct lttng_kernel_calibrate kcalibrate; | |
2191 | ||
2e84128e DG |
2192 | switch (calibrate->type) { |
2193 | case LTTNG_CALIBRATE_FUNCTION: | |
2194 | default: | |
2195 | /* Default and only possible calibrate option. */ | |
2196 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2197 | break; | |
2198 | } | |
2199 | ||
2f77fc4b DG |
2200 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2201 | if (ret < 0) { | |
f73fabfd | 2202 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2203 | goto error; |
2204 | } | |
2205 | break; | |
2206 | } | |
2207 | case LTTNG_DOMAIN_UST: | |
2208 | { | |
2209 | struct lttng_ust_calibrate ucalibrate; | |
2210 | ||
2e84128e DG |
2211 | switch (calibrate->type) { |
2212 | case LTTNG_CALIBRATE_FUNCTION: | |
2213 | default: | |
2214 | /* Default and only possible calibrate option. */ | |
2215 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2216 | break; | |
2217 | } | |
2218 | ||
2f77fc4b DG |
2219 | ret = ust_app_calibrate_glb(&ucalibrate); |
2220 | if (ret < 0) { | |
f73fabfd | 2221 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2222 | goto error; |
2223 | } | |
2224 | break; | |
2225 | } | |
2226 | default: | |
f73fabfd | 2227 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2228 | goto error; |
2229 | } | |
2230 | ||
f73fabfd | 2231 | ret = LTTNG_OK; |
2f77fc4b DG |
2232 | |
2233 | error: | |
2234 | return ret; | |
2235 | } | |
2236 | ||
2237 | /* | |
2238 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2239 | */ | |
2240 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2241 | const char *sock_path, struct consumer_data *cdata) | |
2242 | { | |
2243 | int ret, sock; | |
dd81b457 | 2244 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2245 | |
2246 | assert(session); | |
2247 | assert(cdata); | |
2248 | assert(sock_path); | |
2249 | ||
2250 | switch (domain) { | |
2251 | case LTTNG_DOMAIN_KERNEL: | |
2252 | { | |
2253 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2254 | ||
2255 | assert(ksess); | |
2256 | ||
2257 | /* Can't register a consumer if there is already one */ | |
2258 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2259 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2260 | goto error; |
2261 | } | |
2262 | ||
2263 | sock = lttcomm_connect_unix_sock(sock_path); | |
2264 | if (sock < 0) { | |
f73fabfd | 2265 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2266 | goto error; |
2267 | } | |
4ce514c4 | 2268 | cdata->cmd_sock = sock; |
2f77fc4b | 2269 | |
4ce514c4 | 2270 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2271 | if (socket == NULL) { |
f66c074c DG |
2272 | ret = close(sock); |
2273 | if (ret < 0) { | |
2274 | PERROR("close register consumer"); | |
2275 | } | |
4ce514c4 | 2276 | cdata->cmd_sock = -1; |
f73fabfd | 2277 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2278 | goto error; |
2279 | } | |
2280 | ||
2281 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2282 | if (socket->lock == NULL) { | |
2283 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2284 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2285 | goto error; |
2286 | } | |
2287 | pthread_mutex_init(socket->lock, NULL); | |
2288 | socket->registered = 1; | |
2289 | ||
2290 | rcu_read_lock(); | |
2291 | consumer_add_socket(socket, ksess->consumer); | |
2292 | rcu_read_unlock(); | |
2293 | ||
2294 | pthread_mutex_lock(&cdata->pid_mutex); | |
2295 | cdata->pid = -1; | |
2296 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2297 | ||
2298 | break; | |
2299 | } | |
2300 | default: | |
2301 | /* TODO: Userspace tracing */ | |
f73fabfd | 2302 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2303 | goto error; |
2304 | } | |
2305 | ||
dd81b457 | 2306 | return LTTNG_OK; |
2f77fc4b DG |
2307 | |
2308 | error: | |
dd81b457 DG |
2309 | if (socket) { |
2310 | consumer_destroy_socket(socket); | |
2311 | } | |
2f77fc4b DG |
2312 | return ret; |
2313 | } | |
2314 | ||
2315 | /* | |
2316 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2317 | */ | |
2318 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2319 | struct lttng_domain **domains) | |
2320 | { | |
2321 | int ret, index = 0; | |
2322 | ssize_t nb_dom = 0; | |
2323 | ||
2324 | if (session->kernel_session != NULL) { | |
2325 | DBG3("Listing domains found kernel domain"); | |
2326 | nb_dom++; | |
2327 | } | |
2328 | ||
2329 | if (session->ust_session != NULL) { | |
2330 | DBG3("Listing domains found UST global domain"); | |
2331 | nb_dom++; | |
3c6a091f DG |
2332 | |
2333 | if (session->ust_session->domain_jul.being_used) { | |
2334 | nb_dom++; | |
2335 | } | |
2f77fc4b DG |
2336 | } |
2337 | ||
2338 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
2339 | if (*domains == NULL) { | |
f73fabfd | 2340 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2341 | goto error; |
2342 | } | |
2343 | ||
2344 | if (session->kernel_session != NULL) { | |
2345 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
2346 | index++; | |
2347 | } | |
2348 | ||
2349 | if (session->ust_session != NULL) { | |
2350 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2351 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2352 | index++; |
3c6a091f DG |
2353 | |
2354 | if (session->ust_session->domain_jul.being_used) { | |
2355 | (*domains)[index].type = LTTNG_DOMAIN_JUL; | |
2356 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2357 | index++; | |
2358 | } | |
2f77fc4b DG |
2359 | } |
2360 | ||
2361 | return nb_dom; | |
2362 | ||
2363 | error: | |
f73fabfd DG |
2364 | /* Return negative value to differentiate return code */ |
2365 | return -ret; | |
2f77fc4b DG |
2366 | } |
2367 | ||
2368 | ||
2369 | /* | |
2370 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2371 | */ | |
2372 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2373 | struct lttng_channel **channels) | |
2374 | { | |
2375 | int ret; | |
2376 | ssize_t nb_chan = 0; | |
2377 | ||
2378 | switch (domain) { | |
2379 | case LTTNG_DOMAIN_KERNEL: | |
2380 | if (session->kernel_session != NULL) { | |
2381 | nb_chan = session->kernel_session->channel_count; | |
2382 | } | |
2383 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2384 | if (nb_chan <= 0) { |
2385 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2386 | } | |
2f77fc4b DG |
2387 | break; |
2388 | case LTTNG_DOMAIN_UST: | |
2389 | if (session->ust_session != NULL) { | |
2390 | nb_chan = lttng_ht_get_count( | |
2391 | session->ust_session->domain_global.channels); | |
2392 | } | |
2393 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
2394 | if (nb_chan <= 0) { |
2395 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2396 | } | |
2f77fc4b DG |
2397 | break; |
2398 | default: | |
2399 | *channels = NULL; | |
f73fabfd | 2400 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2401 | goto error; |
2402 | } | |
2403 | ||
2404 | if (nb_chan > 0) { | |
2405 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2406 | if (*channels == NULL) { | |
f73fabfd | 2407 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2408 | goto error; |
2409 | } | |
2410 | ||
2411 | list_lttng_channels(domain, session, *channels); | |
2412 | } else { | |
2413 | *channels = NULL; | |
c7d620a2 DG |
2414 | /* Ret value was set in the domain switch case */ |
2415 | goto error; | |
2f77fc4b DG |
2416 | } |
2417 | ||
2418 | return nb_chan; | |
2419 | ||
2420 | error: | |
f73fabfd DG |
2421 | /* Return negative value to differentiate return code */ |
2422 | return -ret; | |
2f77fc4b DG |
2423 | } |
2424 | ||
2425 | /* | |
2426 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2427 | */ | |
2428 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2429 | char *channel_name, struct lttng_event **events) | |
2430 | { | |
2431 | int ret = 0; | |
2432 | ssize_t nb_event = 0; | |
2433 | ||
2434 | switch (domain) { | |
2435 | case LTTNG_DOMAIN_KERNEL: | |
2436 | if (session->kernel_session != NULL) { | |
2437 | nb_event = list_lttng_kernel_events(channel_name, | |
2438 | session->kernel_session, events); | |
2439 | } | |
2440 | break; | |
2441 | case LTTNG_DOMAIN_UST: | |
2442 | { | |
2443 | if (session->ust_session != NULL) { | |
2444 | nb_event = list_lttng_ust_global_events(channel_name, | |
2445 | &session->ust_session->domain_global, events); | |
2446 | } | |
2447 | break; | |
2448 | } | |
3c6a091f DG |
2449 | case LTTNG_DOMAIN_JUL: |
2450 | if (session->ust_session) { | |
2451 | nb_event = list_lttng_jul_events( | |
2452 | &session->ust_session->domain_jul, events); | |
2453 | } | |
2454 | break; | |
2f77fc4b | 2455 | default: |
f73fabfd | 2456 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2457 | goto error; |
2458 | } | |
2459 | ||
f73fabfd | 2460 | return nb_event; |
2f77fc4b DG |
2461 | |
2462 | error: | |
f73fabfd DG |
2463 | /* Return negative value to differentiate return code */ |
2464 | return -ret; | |
2f77fc4b DG |
2465 | } |
2466 | ||
2467 | /* | |
2468 | * Using the session list, filled a lttng_session array to send back to the | |
2469 | * client for session listing. | |
2470 | * | |
2471 | * The session list lock MUST be acquired before calling this function. Use | |
2472 | * session_lock_list() and session_unlock_list(). | |
2473 | */ | |
2474 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2475 | gid_t gid) | |
2476 | { | |
2477 | int ret; | |
2478 | unsigned int i = 0; | |
2479 | struct ltt_session *session; | |
2480 | struct ltt_session_list *list = session_get_list(); | |
2481 | ||
2482 | DBG("Getting all available session for UID %d GID %d", | |
2483 | uid, gid); | |
2484 | /* | |
2485 | * Iterate over session list and append data after the control struct in | |
2486 | * the buffer. | |
2487 | */ | |
2488 | cds_list_for_each_entry(session, &list->head, list) { | |
2489 | /* | |
2490 | * Only list the sessions the user can control. | |
2491 | */ | |
2492 | if (!session_access_ok(session, uid, gid)) { | |
2493 | continue; | |
2494 | } | |
2495 | ||
2496 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2497 | struct ltt_ust_session *usess = session->ust_session; | |
2498 | ||
2499 | if (session->consumer->type == CONSUMER_DST_NET || | |
2500 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2501 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2502 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2503 | sizeof(sessions[i].path), session); |
2f77fc4b | 2504 | } else { |
dec56f6c | 2505 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2506 | session->consumer->dst.trace_path); |
2507 | } | |
2508 | if (ret < 0) { | |
2509 | PERROR("snprintf session path"); | |
2510 | continue; | |
2511 | } | |
2512 | ||
2513 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2514 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 2515 | sessions[i].enabled = session->active; |
2cbf8fed | 2516 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 2517 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
2518 | i++; |
2519 | } | |
2520 | } | |
2521 | ||
806e2684 | 2522 | /* |
6d805429 | 2523 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2524 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2525 | */ |
6d805429 | 2526 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2527 | { |
2528 | int ret; | |
2529 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2530 | struct ltt_ust_session *usess = session->ust_session; | |
2531 | ||
2532 | assert(session); | |
2533 | ||
2534 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 2535 | if (session->active) { |
806e2684 DG |
2536 | ret = LTTNG_ERR_SESSION_STARTED; |
2537 | goto error; | |
3a89d11a DG |
2538 | } else { |
2539 | /* | |
2540 | * If stopped, just make sure we've started before else the above call | |
2541 | * will always send that there is data pending. | |
2542 | * | |
2543 | * The consumer assumes that when the data pending command is received, | |
2544 | * the trace has been started before or else no output data is written | |
2545 | * by the streams which is a condition for data pending. So, this is | |
2546 | * *VERY* important that we don't ask the consumer before a start | |
2547 | * trace. | |
2548 | */ | |
8382cf6f | 2549 | if (!session->has_been_started) { |
3a89d11a DG |
2550 | ret = 0; |
2551 | goto error; | |
2552 | } | |
806e2684 DG |
2553 | } |
2554 | ||
2555 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2556 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2557 | if (ret == 1) { | |
806e2684 DG |
2558 | /* Data is still being extracted for the kernel. */ |
2559 | goto error; | |
2560 | } | |
2561 | } | |
2562 | ||
2563 | if (usess && usess->consumer) { | |
6d805429 DG |
2564 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2565 | if (ret == 1) { | |
806e2684 DG |
2566 | /* Data is still being extracted for the kernel. */ |
2567 | goto error; | |
2568 | } | |
2569 | } | |
2570 | ||
2571 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2572 | ret = 0; |
806e2684 DG |
2573 | |
2574 | error: | |
2575 | return ret; | |
2576 | } | |
2577 | ||
6dc3064a DG |
2578 | /* |
2579 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2580 | * | |
2581 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2582 | */ | |
2583 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2584 | struct lttng_snapshot_output *output, uint32_t *id) | |
2585 | { | |
2586 | int ret; | |
2587 | struct snapshot_output *new_output; | |
2588 | ||
2589 | assert(session); | |
2590 | assert(output); | |
2591 | ||
2592 | DBG("Cmd snapshot add output for session %s", session->name); | |
2593 | ||
2594 | /* | |
d3f14b8a MD |
2595 | * Permission denied to create an output if the session is not |
2596 | * set in no output mode. | |
6dc3064a DG |
2597 | */ |
2598 | if (session->output_traces) { | |
2599 | ret = LTTNG_ERR_EPERM; | |
2600 | goto error; | |
2601 | } | |
2602 | ||
2603 | /* Only one output is allowed until we have the "tee" feature. */ | |
2604 | if (session->snapshot.nb_output == 1) { | |
2605 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2606 | goto error; | |
2607 | } | |
2608 | ||
2609 | new_output = snapshot_output_alloc(); | |
2610 | if (!new_output) { | |
2611 | ret = LTTNG_ERR_NOMEM; | |
2612 | goto error; | |
2613 | } | |
2614 | ||
2615 | ret = snapshot_output_init(output->max_size, output->name, | |
2616 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2617 | &session->snapshot); | |
2618 | if (ret < 0) { | |
2619 | if (ret == -ENOMEM) { | |
2620 | ret = LTTNG_ERR_NOMEM; | |
2621 | } else { | |
2622 | ret = LTTNG_ERR_INVALID; | |
2623 | } | |
2624 | goto free_error; | |
2625 | } | |
2626 | ||
6dc3064a DG |
2627 | rcu_read_lock(); |
2628 | snapshot_add_output(&session->snapshot, new_output); | |
2629 | if (id) { | |
2630 | *id = new_output->id; | |
2631 | } | |
2632 | rcu_read_unlock(); | |
2633 | ||
2634 | return LTTNG_OK; | |
2635 | ||
2636 | free_error: | |
2637 | snapshot_output_destroy(new_output); | |
2638 | error: | |
2639 | return ret; | |
2640 | } | |
2641 | ||
2642 | /* | |
2643 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2644 | * | |
2645 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2646 | */ | |
2647 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2648 | struct lttng_snapshot_output *output) | |
2649 | { | |
2650 | int ret; | |
eb240553 | 2651 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2652 | |
2653 | assert(session); | |
2654 | assert(output); | |
2655 | ||
6dc3064a DG |
2656 | rcu_read_lock(); |
2657 | ||
2658 | /* | |
d3f14b8a MD |
2659 | * Permission denied to create an output if the session is not |
2660 | * set in no output mode. | |
6dc3064a DG |
2661 | */ |
2662 | if (session->output_traces) { | |
2663 | ret = LTTNG_ERR_EPERM; | |
2664 | goto error; | |
2665 | } | |
2666 | ||
eb240553 DG |
2667 | if (output->id) { |
2668 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2669 | session->name); | |
2670 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2671 | } else if (*output->name != '\0') { | |
2672 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2673 | session->name); | |
2674 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2675 | } | |
6dc3064a DG |
2676 | if (!sout) { |
2677 | ret = LTTNG_ERR_INVALID; | |
2678 | goto error; | |
2679 | } | |
2680 | ||
2681 | snapshot_delete_output(&session->snapshot, sout); | |
2682 | snapshot_output_destroy(sout); | |
2683 | ret = LTTNG_OK; | |
2684 | ||
2685 | error: | |
2686 | rcu_read_unlock(); | |
2687 | return ret; | |
2688 | } | |
2689 | ||
2690 | /* | |
2691 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2692 | * | |
2693 | * If no output is available, outputs is untouched and 0 is returned. | |
2694 | * | |
2695 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2696 | */ | |
2697 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2698 | struct lttng_snapshot_output **outputs) | |
2699 | { | |
2700 | int ret, idx = 0; | |
2701 | struct lttng_snapshot_output *list; | |
2702 | struct lttng_ht_iter iter; | |
2703 | struct snapshot_output *output; | |
2704 | ||
2705 | assert(session); | |
2706 | assert(outputs); | |
2707 | ||
2708 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2709 | ||
2710 | /* | |
d3f14b8a MD |
2711 | * Permission denied to create an output if the session is not |
2712 | * set in no output mode. | |
6dc3064a DG |
2713 | */ |
2714 | if (session->output_traces) { | |
2715 | ret = LTTNG_ERR_EPERM; | |
2716 | goto error; | |
2717 | } | |
2718 | ||
2719 | if (session->snapshot.nb_output == 0) { | |
2720 | ret = 0; | |
2721 | goto error; | |
2722 | } | |
2723 | ||
2724 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2725 | if (!list) { | |
2726 | ret = LTTNG_ERR_NOMEM; | |
2727 | goto error; | |
2728 | } | |
2729 | ||
2730 | /* Copy list from session to the new list object. */ | |
2731 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, | |
2732 | output, node.node) { | |
2733 | assert(output->consumer); | |
2734 | list[idx].id = output->id; | |
2735 | list[idx].max_size = output->max_size; | |
2736 | strncpy(list[idx].name, output->name, sizeof(list[idx].name)); | |
2737 | if (output->consumer->type == CONSUMER_DST_LOCAL) { | |
2738 | strncpy(list[idx].ctrl_url, output->consumer->dst.trace_path, | |
2739 | sizeof(list[idx].ctrl_url)); | |
2740 | } else { | |
2741 | /* Control URI. */ | |
2742 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
2743 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
2744 | if (ret < 0) { | |
2745 | ret = LTTNG_ERR_NOMEM; | |
2746 | goto free_error; | |
2747 | } | |
2748 | ||
2749 | /* Data URI. */ | |
2750 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
2751 | list[idx].data_url, sizeof(list[idx].data_url)); | |
2752 | if (ret < 0) { | |
2753 | ret = LTTNG_ERR_NOMEM; | |
2754 | goto free_error; | |
2755 | } | |
2756 | } | |
2757 | idx++; | |
2758 | } | |
2759 | ||
2760 | *outputs = list; | |
2761 | return session->snapshot.nb_output; | |
2762 | ||
2763 | free_error: | |
2764 | free(list); | |
2765 | error: | |
2766 | return -ret; | |
2767 | } | |
2768 | ||
2769 | /* | |
2770 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
2771 | * snapshot output is *not* set with a remote destination. | |
2772 | * | |
a934f4af | 2773 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2774 | */ |
2775 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
2776 | struct snapshot_output *snap_output, struct ltt_session *session) | |
2777 | { | |
a934f4af | 2778 | int ret = LTTNG_OK; |
6dc3064a DG |
2779 | struct lttng_ht_iter iter; |
2780 | struct consumer_socket *socket; | |
2781 | ||
2782 | assert(consumer); | |
2783 | assert(snap_output); | |
2784 | assert(session); | |
2785 | ||
2786 | DBG2("Set relayd object from snapshot output"); | |
2787 | ||
2788 | /* Ignore if snapshot consumer output is not network. */ | |
2789 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
2790 | goto error; | |
2791 | } | |
2792 | ||
2793 | /* | |
2794 | * For each consumer socket, create and send the relayd object of the | |
2795 | * snapshot output. | |
2796 | */ | |
2797 | rcu_read_lock(); | |
5eecee74 DG |
2798 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
2799 | socket, node.node) { | |
6dc3064a | 2800 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
2801 | snap_output->consumer, socket, |
2802 | session->name, session->hostname, | |
2803 | session->live_timer); | |
a934f4af | 2804 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2805 | rcu_read_unlock(); |
2806 | goto error; | |
2807 | } | |
2808 | } | |
2809 | rcu_read_unlock(); | |
2810 | ||
2811 | error: | |
2812 | return ret; | |
2813 | } | |
2814 | ||
2815 | /* | |
2816 | * Record a kernel snapshot. | |
2817 | * | |
fac41e72 | 2818 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
2819 | */ |
2820 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded JD |
2821 | struct snapshot_output *output, struct ltt_session *session, |
2822 | int wait, int nb_streams) | |
6dc3064a DG |
2823 | { |
2824 | int ret; | |
2825 | ||
2826 | assert(ksess); | |
2827 | assert(output); | |
2828 | assert(session); | |
2829 | ||
10a50311 JD |
2830 | /* Get the datetime for the snapshot output directory. */ |
2831 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2832 | sizeof(output->datetime)); | |
2833 | if (!ret) { | |
a934f4af | 2834 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2835 | goto error; |
2836 | } | |
2837 | ||
af706bb7 DG |
2838 | /* |
2839 | * Copy kernel session sockets so we can communicate with the right | |
2840 | * consumer for the snapshot record command. | |
2841 | */ | |
2842 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
2843 | if (ret < 0) { | |
a934f4af | 2844 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2845 | goto error; |
6dc3064a DG |
2846 | } |
2847 | ||
2848 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 2849 | if (ret != LTTNG_OK) { |
af706bb7 | 2850 | goto error_snapshot; |
6dc3064a DG |
2851 | } |
2852 | ||
5c786ded | 2853 | ret = kernel_snapshot_record(ksess, output, wait, nb_streams); |
2a06df8d | 2854 | if (ret != LTTNG_OK) { |
af706bb7 | 2855 | goto error_snapshot; |
6dc3064a DG |
2856 | } |
2857 | ||
a934f4af DG |
2858 | ret = LTTNG_OK; |
2859 | ||
af706bb7 DG |
2860 | error_snapshot: |
2861 | /* Clean up copied sockets so this output can use some other later on. */ | |
2862 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
2863 | error: |
2864 | return ret; | |
2865 | } | |
2866 | ||
2867 | /* | |
2868 | * Record a UST snapshot. | |
2869 | * | |
a934f4af | 2870 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
2871 | */ |
2872 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded JD |
2873 | struct snapshot_output *output, struct ltt_session *session, |
2874 | int wait, int nb_streams) | |
6dc3064a DG |
2875 | { |
2876 | int ret; | |
2877 | ||
2878 | assert(usess); | |
2879 | assert(output); | |
2880 | assert(session); | |
2881 | ||
10a50311 JD |
2882 | /* Get the datetime for the snapshot output directory. */ |
2883 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2884 | sizeof(output->datetime)); | |
2885 | if (!ret) { | |
a934f4af | 2886 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2887 | goto error; |
2888 | } | |
2889 | ||
af706bb7 | 2890 | /* |
d3f14b8a | 2891 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
2892 | * consumer for the snapshot record command. |
2893 | */ | |
2894 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
2895 | if (ret < 0) { | |
a934f4af | 2896 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2897 | goto error; |
6dc3064a DG |
2898 | } |
2899 | ||
2900 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 2901 | if (ret != LTTNG_OK) { |
af706bb7 | 2902 | goto error_snapshot; |
6dc3064a DG |
2903 | } |
2904 | ||
5c786ded | 2905 | ret = ust_app_snapshot_record(usess, output, wait, nb_streams); |
6dc3064a | 2906 | if (ret < 0) { |
7badf927 DG |
2907 | switch (-ret) { |
2908 | case EINVAL: | |
a934f4af | 2909 | ret = LTTNG_ERR_INVALID; |
7badf927 DG |
2910 | break; |
2911 | case ENODATA: | |
2912 | ret = LTTNG_ERR_SNAPSHOT_NODATA; | |
2913 | break; | |
2914 | default: | |
2915 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
2916 | break; | |
5c786ded | 2917 | } |
af706bb7 | 2918 | goto error_snapshot; |
6dc3064a DG |
2919 | } |
2920 | ||
a934f4af DG |
2921 | ret = LTTNG_OK; |
2922 | ||
af706bb7 DG |
2923 | error_snapshot: |
2924 | /* Clean up copied sockets so this output can use some other later on. */ | |
2925 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
2926 | error: |
2927 | return ret; | |
2928 | } | |
2929 | ||
5c786ded JD |
2930 | /* |
2931 | * Returns the total number of streams for a session or a negative value | |
2932 | * on error. | |
2933 | */ | |
2934 | static unsigned int get_total_nb_stream(struct ltt_session *session) | |
2935 | { | |
2936 | unsigned int total_streams = 0; | |
2937 | ||
2938 | if (session->kernel_session) { | |
2939 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2940 | ||
2941 | total_streams += ksess->stream_count_global; | |
2942 | } | |
2943 | ||
2944 | if (session->ust_session) { | |
2945 | struct ltt_ust_session *usess = session->ust_session; | |
2946 | ||
2947 | total_streams += ust_app_get_nb_stream(usess); | |
2948 | } | |
2949 | ||
2950 | return total_streams; | |
2951 | } | |
2952 | ||
6dc3064a DG |
2953 | /* |
2954 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
2955 | * | |
2956 | * The wait parameter is ignored so this call always wait for the snapshot to | |
2957 | * complete before returning. | |
2958 | * | |
2959 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2960 | */ | |
2961 | int cmd_snapshot_record(struct ltt_session *session, | |
2962 | struct lttng_snapshot_output *output, int wait) | |
2963 | { | |
2964 | int ret = LTTNG_OK; | |
e1986656 DG |
2965 | unsigned int use_tmp_output = 0; |
2966 | struct snapshot_output tmp_output; | |
1bfe7328 | 2967 | unsigned int nb_streams, snapshot_success = 0; |
6dc3064a DG |
2968 | |
2969 | assert(session); | |
2970 | ||
2971 | DBG("Cmd snapshot record for session %s", session->name); | |
2972 | ||
2973 | /* | |
d3f14b8a MD |
2974 | * Permission denied to create an output if the session is not |
2975 | * set in no output mode. | |
6dc3064a DG |
2976 | */ |
2977 | if (session->output_traces) { | |
2978 | ret = LTTNG_ERR_EPERM; | |
2979 | goto error; | |
2980 | } | |
2981 | ||
2982 | /* The session needs to be started at least once. */ | |
8382cf6f | 2983 | if (!session->has_been_started) { |
6dc3064a DG |
2984 | ret = LTTNG_ERR_START_SESSION_ONCE; |
2985 | goto error; | |
2986 | } | |
2987 | ||
2988 | /* Use temporary output for the session. */ | |
2989 | if (output && *output->ctrl_url != '\0') { | |
6dc3064a DG |
2990 | ret = snapshot_output_init(output->max_size, output->name, |
2991 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 2992 | &tmp_output, NULL); |
6dc3064a DG |
2993 | if (ret < 0) { |
2994 | if (ret == -ENOMEM) { | |
2995 | ret = LTTNG_ERR_NOMEM; | |
2996 | } else { | |
2997 | ret = LTTNG_ERR_INVALID; | |
2998 | } | |
2999 | goto error; | |
3000 | } | |
1bfe7328 DG |
3001 | /* Use the global session count for the temporary snapshot. */ |
3002 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
e1986656 | 3003 | use_tmp_output = 1; |
6dc3064a DG |
3004 | } |
3005 | ||
5c786ded JD |
3006 | /* |
3007 | * Get the total number of stream of that session which is used by the | |
3008 | * maximum size of the snapshot feature. | |
3009 | */ | |
3010 | nb_streams = get_total_nb_stream(session); | |
3011 | ||
6dc3064a DG |
3012 | if (session->kernel_session) { |
3013 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3014 | ||
e1986656 DG |
3015 | if (use_tmp_output) { |
3016 | ret = record_kernel_snapshot(ksess, &tmp_output, session, | |
5c786ded | 3017 | wait, nb_streams); |
a934f4af | 3018 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3019 | goto error; |
3020 | } | |
1bfe7328 | 3021 | snapshot_success = 1; |
6dc3064a DG |
3022 | } else { |
3023 | struct snapshot_output *sout; | |
3024 | struct lttng_ht_iter iter; | |
3025 | ||
3026 | rcu_read_lock(); | |
3027 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3028 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3029 | /* |
3030 | * Make a local copy of the output and assign the possible | |
3031 | * temporary value given by the caller. | |
3032 | */ | |
3033 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3034 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3035 | ||
3036 | /* Use temporary max size. */ | |
3037 | if (output->max_size != (uint64_t) -1ULL) { | |
3038 | tmp_output.max_size = output->max_size; | |
3039 | } | |
3040 | ||
3041 | /* Use temporary name. */ | |
3042 | if (*output->name != '\0') { | |
3043 | strncpy(tmp_output.name, output->name, | |
3044 | sizeof(tmp_output.name)); | |
3045 | } | |
3046 | ||
1bfe7328 DG |
3047 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3048 | ||
e1986656 | 3049 | ret = record_kernel_snapshot(ksess, &tmp_output, |
5c786ded | 3050 | session, wait, nb_streams); |
a934f4af | 3051 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3052 | rcu_read_unlock(); |
3053 | goto error; | |
3054 | } | |
1bfe7328 | 3055 | snapshot_success = 1; |
6dc3064a DG |
3056 | } |
3057 | rcu_read_unlock(); | |
3058 | } | |
3059 | } | |
3060 | ||
3061 | if (session->ust_session) { | |
3062 | struct ltt_ust_session *usess = session->ust_session; | |
3063 | ||
e1986656 DG |
3064 | if (use_tmp_output) { |
3065 | ret = record_ust_snapshot(usess, &tmp_output, session, | |
5c786ded | 3066 | wait, nb_streams); |
a934f4af | 3067 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3068 | goto error; |
3069 | } | |
1bfe7328 | 3070 | snapshot_success = 1; |
6dc3064a DG |
3071 | } else { |
3072 | struct snapshot_output *sout; | |
3073 | struct lttng_ht_iter iter; | |
3074 | ||
3075 | rcu_read_lock(); | |
3076 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3077 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3078 | /* |
3079 | * Make a local copy of the output and assign the possible | |
3080 | * temporary value given by the caller. | |
3081 | */ | |
3082 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3083 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3084 | ||
e1986656 DG |
3085 | /* Use temporary max size. */ |
3086 | if (output->max_size != (uint64_t) -1ULL) { | |
3087 | tmp_output.max_size = output->max_size; | |
3088 | } | |
3089 | ||
3090 | /* Use temporary name. */ | |
3091 | if (*output->name != '\0') { | |
3092 | strncpy(tmp_output.name, output->name, | |
3093 | sizeof(tmp_output.name)); | |
3094 | } | |
3095 | ||
1bfe7328 DG |
3096 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3097 | ||
e1986656 | 3098 | ret = record_ust_snapshot(usess, &tmp_output, session, |
5c786ded | 3099 | wait, nb_streams); |
a934f4af | 3100 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3101 | rcu_read_unlock(); |
3102 | goto error; | |
3103 | } | |
1bfe7328 | 3104 | snapshot_success = 1; |
6dc3064a DG |
3105 | } |
3106 | rcu_read_unlock(); | |
3107 | } | |
3108 | } | |
3109 | ||
1bfe7328 DG |
3110 | if (snapshot_success) { |
3111 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3112 | } else { |
3113 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3114 | } |
3115 | ||
6dc3064a | 3116 | error: |
6dc3064a DG |
3117 | return ret; |
3118 | } | |
3119 | ||
2f77fc4b DG |
3120 | /* |
3121 | * Init command subsystem. | |
3122 | */ | |
3123 | void cmd_init(void) | |
3124 | { | |
3125 | /* | |
d88aee68 DG |
3126 | * Set network sequence index to 1 for streams to match a relayd |
3127 | * socket on the consumer side. | |
2f77fc4b | 3128 | */ |
d88aee68 DG |
3129 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3130 | relayd_net_seq_idx = 1; | |
3131 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3132 | |
3133 | DBG("Command subsystem initialized"); | |
3134 | } |