Commit | Line | Data |
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2f77fc4b DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
bdf64013 | 3 | * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
2f77fc4b DG |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License, version 2 only, as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
16 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
6c1c0768 | 19 | #define _LGPL_SOURCE |
2f77fc4b | 20 | #include <assert.h> |
6dc3064a | 21 | #include <inttypes.h> |
2f77fc4b DG |
22 | #include <urcu/list.h> |
23 | #include <urcu/uatomic.h> | |
24 | ||
25 | #include <common/defaults.h> | |
26 | #include <common/common.h> | |
27 | #include <common/sessiond-comm/sessiond-comm.h> | |
28 | #include <common/relayd/relayd.h> | |
10a50311 | 29 | #include <common/utils.h> |
f5436bfc | 30 | #include <common/compat/string.h> |
93ec662e | 31 | #include <common/kernel-ctl/kernel-ctl.h> |
2a5656c6 | 32 | #include <common/string-utils/string-utils.h> |
2f77fc4b DG |
33 | |
34 | #include "channel.h" | |
35 | #include "consumer.h" | |
36 | #include "event.h" | |
8782cc74 | 37 | #include "health-sessiond.h" |
2f77fc4b DG |
38 | #include "kernel.h" |
39 | #include "kernel-consumer.h" | |
40 | #include "lttng-sessiond.h" | |
41 | #include "utils.h" | |
834978fd | 42 | #include "syscall.h" |
7c1d2758 | 43 | #include "agent.h" |
93ec662e | 44 | #include "buffer-registry.h" |
2f77fc4b DG |
45 | |
46 | #include "cmd.h" | |
47 | ||
48 | /* | |
49 | * Used to keep a unique index for each relayd socket created where this value | |
50 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
51 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
52 | * held. | |
2f77fc4b | 53 | */ |
d88aee68 DG |
54 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
55 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 56 | |
7076b56e JG |
57 | static int validate_ust_event_name(const char *); |
58 | static int cmd_enable_event_internal(struct ltt_session *session, | |
59 | struct lttng_domain *domain, | |
60 | char *channel_name, struct lttng_event *event, | |
61 | char *filter_expression, | |
62 | struct lttng_filter_bytecode *filter, | |
63 | struct lttng_event_exclusion *exclusion, | |
64 | int wpipe); | |
65 | ||
2f77fc4b DG |
66 | /* |
67 | * Create a session path used by list_lttng_sessions for the case that the | |
68 | * session consumer is on the network. | |
69 | */ | |
70 | static int build_network_session_path(char *dst, size_t size, | |
71 | struct ltt_session *session) | |
72 | { | |
73 | int ret, kdata_port, udata_port; | |
74 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
75 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
76 | ||
77 | assert(session); | |
78 | assert(dst); | |
79 | ||
80 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
81 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
82 | ||
83 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
84 | ||
85 | if (session->kernel_session && session->kernel_session->consumer) { | |
86 | kuri = &session->kernel_session->consumer->dst.net.control; | |
87 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
88 | } | |
89 | ||
90 | if (session->ust_session && session->ust_session->consumer) { | |
91 | uuri = &session->ust_session->consumer->dst.net.control; | |
92 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
93 | } | |
94 | ||
95 | if (uuri == NULL && kuri == NULL) { | |
96 | uri = &session->consumer->dst.net.control; | |
97 | kdata_port = session->consumer->dst.net.data.port; | |
98 | } else if (kuri && uuri) { | |
99 | ret = uri_compare(kuri, uuri); | |
100 | if (ret) { | |
101 | /* Not Equal */ | |
102 | uri = kuri; | |
103 | /* Build uuri URL string */ | |
104 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
105 | if (ret < 0) { | |
106 | goto error; | |
107 | } | |
108 | } else { | |
109 | uri = kuri; | |
110 | } | |
111 | } else if (kuri && uuri == NULL) { | |
112 | uri = kuri; | |
113 | } else if (uuri && kuri == NULL) { | |
114 | uri = uuri; | |
115 | } | |
116 | ||
117 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
118 | if (ret < 0) { | |
119 | goto error; | |
120 | } | |
121 | ||
9aa9f900 DG |
122 | /* |
123 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
124 | * to print. | |
125 | */ | |
9d035200 | 126 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
127 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
128 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
129 | } else { | |
9aa9f900 | 130 | int dport; |
bef08707 | 131 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
132 | dport = kdata_port; |
133 | } else { | |
134 | /* No kernel URI, use the UST port. */ | |
135 | dport = udata_port; | |
136 | } | |
137 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
138 | } |
139 | ||
140 | error: | |
141 | return ret; | |
142 | } | |
143 | ||
fb83fe64 JD |
144 | /* |
145 | * Get run-time attributes if the session has been started (discarded events, | |
146 | * lost packets). | |
147 | */ | |
148 | static int get_kernel_runtime_stats(struct ltt_session *session, | |
149 | struct ltt_kernel_channel *kchan, uint64_t *discarded_events, | |
150 | uint64_t *lost_packets) | |
151 | { | |
152 | int ret; | |
153 | ||
154 | if (!session->has_been_started) { | |
155 | ret = 0; | |
156 | *discarded_events = 0; | |
157 | *lost_packets = 0; | |
158 | goto end; | |
159 | } | |
160 | ||
161 | ret = consumer_get_discarded_events(session->id, kchan->fd, | |
162 | session->kernel_session->consumer, | |
163 | discarded_events); | |
164 | if (ret < 0) { | |
165 | goto end; | |
166 | } | |
167 | ||
168 | ret = consumer_get_lost_packets(session->id, kchan->fd, | |
169 | session->kernel_session->consumer, | |
170 | lost_packets); | |
171 | if (ret < 0) { | |
172 | goto end; | |
173 | } | |
174 | ||
175 | end: | |
176 | return ret; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Get run-time attributes if the session has been started (discarded events, | |
181 | * lost packets). | |
182 | */ | |
183 | static int get_ust_runtime_stats(struct ltt_session *session, | |
184 | struct ltt_ust_channel *uchan, uint64_t *discarded_events, | |
185 | uint64_t *lost_packets) | |
186 | { | |
187 | int ret; | |
188 | struct ltt_ust_session *usess; | |
189 | ||
a91c5803 JG |
190 | if (!discarded_events || !lost_packets) { |
191 | ret = -1; | |
192 | goto end; | |
193 | } | |
194 | ||
fb83fe64 | 195 | usess = session->ust_session; |
a905c624 JG |
196 | assert(discarded_events); |
197 | assert(lost_packets); | |
fb83fe64 JD |
198 | |
199 | if (!usess || !session->has_been_started) { | |
200 | *discarded_events = 0; | |
201 | *lost_packets = 0; | |
202 | ret = 0; | |
203 | goto end; | |
204 | } | |
205 | ||
206 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
207 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
208 | &usess->buffer_reg_uid_list, | |
209 | usess->consumer, uchan->id, | |
210 | uchan->attr.overwrite, | |
211 | discarded_events, | |
212 | lost_packets); | |
213 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { | |
214 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
215 | uchan, usess->consumer, | |
216 | uchan->attr.overwrite, | |
217 | discarded_events, | |
218 | lost_packets); | |
219 | if (ret < 0) { | |
220 | goto end; | |
221 | } | |
222 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
223 | *lost_packets += uchan->per_pid_closed_app_lost; | |
224 | } else { | |
225 | ERR("Unsupported buffer type"); | |
967bc289 | 226 | assert(0); |
fb83fe64 JD |
227 | ret = -1; |
228 | goto end; | |
229 | } | |
230 | ||
231 | end: | |
232 | return ret; | |
233 | } | |
234 | ||
2f77fc4b DG |
235 | /* |
236 | * Fill lttng_channel array of all channels. | |
237 | */ | |
56a37563 | 238 | static void list_lttng_channels(enum lttng_domain_type domain, |
fb83fe64 JD |
239 | struct ltt_session *session, struct lttng_channel *channels, |
240 | struct lttcomm_channel_extended *chan_exts) | |
2f77fc4b | 241 | { |
fb83fe64 | 242 | int i = 0, ret; |
2f77fc4b DG |
243 | struct ltt_kernel_channel *kchan; |
244 | ||
245 | DBG("Listing channels for session %s", session->name); | |
246 | ||
247 | switch (domain) { | |
248 | case LTTNG_DOMAIN_KERNEL: | |
249 | /* Kernel channels */ | |
250 | if (session->kernel_session != NULL) { | |
251 | cds_list_for_each_entry(kchan, | |
252 | &session->kernel_session->channel_list.head, list) { | |
fb83fe64 JD |
253 | uint64_t discarded_events, lost_packets; |
254 | ||
255 | ret = get_kernel_runtime_stats(session, kchan, | |
256 | &discarded_events, &lost_packets); | |
257 | if (ret < 0) { | |
258 | goto end; | |
259 | } | |
2f77fc4b DG |
260 | /* Copy lttng_channel struct to array */ |
261 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
262 | channels[i].enabled = kchan->enabled; | |
fb83fe64 JD |
263 | chan_exts[i].discarded_events = |
264 | discarded_events; | |
265 | chan_exts[i].lost_packets = lost_packets; | |
2f77fc4b DG |
266 | i++; |
267 | } | |
268 | } | |
269 | break; | |
270 | case LTTNG_DOMAIN_UST: | |
271 | { | |
272 | struct lttng_ht_iter iter; | |
273 | struct ltt_ust_channel *uchan; | |
274 | ||
e7fe706f | 275 | rcu_read_lock(); |
2f77fc4b DG |
276 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
277 | &iter.iter, uchan, node.node) { | |
a91c5803 | 278 | uint64_t discarded_events = 0, lost_packets = 0; |
fb83fe64 | 279 | |
8ee609c8 MD |
280 | if (lttng_strncpy(channels[i].name, uchan->name, |
281 | LTTNG_SYMBOL_NAME_LEN)) { | |
282 | break; | |
283 | } | |
2f77fc4b DG |
284 | channels[i].attr.overwrite = uchan->attr.overwrite; |
285 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
286 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
287 | channels[i].attr.switch_timer_interval = | |
288 | uchan->attr.switch_timer_interval; | |
289 | channels[i].attr.read_timer_interval = | |
290 | uchan->attr.read_timer_interval; | |
291 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
292 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
293 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
5e4435a4 JG |
294 | |
295 | /* | |
296 | * Map enum lttng_ust_output to enum lttng_event_output. | |
297 | */ | |
2f77fc4b DG |
298 | switch (uchan->attr.output) { |
299 | case LTTNG_UST_MMAP: | |
2f77fc4b DG |
300 | channels[i].attr.output = LTTNG_EVENT_MMAP; |
301 | break; | |
5e4435a4 JG |
302 | default: |
303 | /* | |
304 | * LTTNG_UST_MMAP is the only supported UST | |
305 | * output mode. | |
306 | */ | |
307 | assert(0); | |
308 | break; | |
2f77fc4b | 309 | } |
fb83fe64 JD |
310 | |
311 | ret = get_ust_runtime_stats(session, uchan, | |
312 | &discarded_events, &lost_packets); | |
313 | if (ret < 0) { | |
314 | break; | |
315 | } | |
316 | chan_exts[i].discarded_events = discarded_events; | |
317 | chan_exts[i].lost_packets = lost_packets; | |
2f77fc4b DG |
318 | i++; |
319 | } | |
e7fe706f | 320 | rcu_read_unlock(); |
2f77fc4b DG |
321 | break; |
322 | } | |
323 | default: | |
324 | break; | |
325 | } | |
fb83fe64 JD |
326 | |
327 | end: | |
328 | return; | |
2f77fc4b DG |
329 | } |
330 | ||
b4e3ceb9 | 331 | static void increment_extended_len(const char *filter_expression, |
795d57ce | 332 | struct lttng_event_exclusion *exclusion, size_t *extended_len) |
b4e3ceb9 PP |
333 | { |
334 | *extended_len += sizeof(struct lttcomm_event_extended_header); | |
335 | ||
336 | if (filter_expression) { | |
337 | *extended_len += strlen(filter_expression) + 1; | |
338 | } | |
795d57ce PP |
339 | |
340 | if (exclusion) { | |
341 | *extended_len += exclusion->count * LTTNG_SYMBOL_NAME_LEN; | |
342 | } | |
b4e3ceb9 PP |
343 | } |
344 | ||
345 | static void append_extended_info(const char *filter_expression, | |
795d57ce | 346 | struct lttng_event_exclusion *exclusion, void **extended_at) |
b4e3ceb9 PP |
347 | { |
348 | struct lttcomm_event_extended_header extended_header; | |
349 | size_t filter_len = 0; | |
795d57ce | 350 | size_t nb_exclusions = 0; |
b4e3ceb9 PP |
351 | |
352 | if (filter_expression) { | |
353 | filter_len = strlen(filter_expression) + 1; | |
354 | } | |
355 | ||
795d57ce PP |
356 | if (exclusion) { |
357 | nb_exclusions = exclusion->count; | |
358 | } | |
359 | ||
360 | /* Set header fields */ | |
b4e3ceb9 | 361 | extended_header.filter_len = filter_len; |
795d57ce PP |
362 | extended_header.nb_exclusions = nb_exclusions; |
363 | ||
364 | /* Copy header */ | |
b4e3ceb9 PP |
365 | memcpy(*extended_at, &extended_header, sizeof(extended_header)); |
366 | *extended_at += sizeof(extended_header); | |
795d57ce PP |
367 | |
368 | /* Copy filter string */ | |
369 | if (filter_expression) { | |
370 | memcpy(*extended_at, filter_expression, filter_len); | |
371 | *extended_at += filter_len; | |
372 | } | |
373 | ||
374 | /* Copy exclusion names */ | |
375 | if (exclusion) { | |
376 | size_t len = nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
377 | ||
378 | memcpy(*extended_at, &exclusion->names, len); | |
379 | *extended_at += len; | |
380 | } | |
b4e3ceb9 PP |
381 | } |
382 | ||
3c6a091f | 383 | /* |
022d91ba | 384 | * Create a list of agent domain events. |
3c6a091f DG |
385 | * |
386 | * Return number of events in list on success or else a negative value. | |
387 | */ | |
022d91ba | 388 | static int list_lttng_agent_events(struct agent *agt, |
b4e3ceb9 | 389 | struct lttng_event **events, size_t *total_size) |
3c6a091f DG |
390 | { |
391 | int i = 0, ret = 0; | |
392 | unsigned int nb_event = 0; | |
022d91ba | 393 | struct agent_event *event; |
3c6a091f DG |
394 | struct lttng_event *tmp_events; |
395 | struct lttng_ht_iter iter; | |
b4e3ceb9 PP |
396 | size_t extended_len = 0; |
397 | void *extended_at; | |
3c6a091f | 398 | |
022d91ba | 399 | assert(agt); |
3c6a091f DG |
400 | assert(events); |
401 | ||
022d91ba | 402 | DBG3("Listing agent events"); |
3c6a091f | 403 | |
e5bbf678 | 404 | rcu_read_lock(); |
022d91ba | 405 | nb_event = lttng_ht_get_count(agt->events); |
e5bbf678 | 406 | rcu_read_unlock(); |
3c6a091f DG |
407 | if (nb_event == 0) { |
408 | ret = nb_event; | |
b4e3ceb9 | 409 | *total_size = 0; |
3c6a091f DG |
410 | goto error; |
411 | } | |
412 | ||
b4e3ceb9 PP |
413 | /* Compute required extended infos size */ |
414 | extended_len = nb_event * sizeof(struct lttcomm_event_extended_header); | |
415 | ||
416 | /* | |
417 | * This is only valid because the commands which add events are | |
418 | * processed in the same thread as the listing. | |
419 | */ | |
420 | rcu_read_lock(); | |
421 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { | |
795d57ce PP |
422 | increment_extended_len(event->filter_expression, NULL, |
423 | &extended_len); | |
b4e3ceb9 PP |
424 | } |
425 | rcu_read_unlock(); | |
426 | ||
427 | *total_size = nb_event * sizeof(*tmp_events) + extended_len; | |
428 | tmp_events = zmalloc(*total_size); | |
3c6a091f | 429 | if (!tmp_events) { |
022d91ba | 430 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
431 | ret = -LTTNG_ERR_FATAL; |
432 | goto error; | |
433 | } | |
434 | ||
b4e3ceb9 PP |
435 | extended_at = ((uint8_t *) tmp_events) + |
436 | nb_event * sizeof(struct lttng_event); | |
437 | ||
3c6a091f | 438 | rcu_read_lock(); |
022d91ba | 439 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
440 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
441 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
442 | tmp_events[i].enabled = event->enabled; | |
2106efa0 | 443 | tmp_events[i].loglevel = event->loglevel_value; |
ff94328f | 444 | tmp_events[i].loglevel_type = event->loglevel_type; |
3c6a091f | 445 | i++; |
b4e3ceb9 PP |
446 | |
447 | /* Append extended info */ | |
795d57ce PP |
448 | append_extended_info(event->filter_expression, NULL, |
449 | &extended_at); | |
3c6a091f DG |
450 | } |
451 | rcu_read_unlock(); | |
452 | ||
453 | *events = tmp_events; | |
454 | ret = nb_event; | |
455 | ||
456 | error: | |
457 | assert(nb_event == i); | |
458 | return ret; | |
459 | } | |
460 | ||
2f77fc4b DG |
461 | /* |
462 | * Create a list of ust global domain events. | |
463 | */ | |
464 | static int list_lttng_ust_global_events(char *channel_name, | |
b4e3ceb9 PP |
465 | struct ltt_ust_domain_global *ust_global, |
466 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
467 | { |
468 | int i = 0, ret = 0; | |
469 | unsigned int nb_event = 0; | |
470 | struct lttng_ht_iter iter; | |
471 | struct lttng_ht_node_str *node; | |
472 | struct ltt_ust_channel *uchan; | |
473 | struct ltt_ust_event *uevent; | |
474 | struct lttng_event *tmp; | |
b4e3ceb9 PP |
475 | size_t extended_len = 0; |
476 | void *extended_at; | |
2f77fc4b DG |
477 | |
478 | DBG("Listing UST global events for channel %s", channel_name); | |
479 | ||
480 | rcu_read_lock(); | |
481 | ||
482 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
483 | node = lttng_ht_iter_get_node_str(&iter); | |
484 | if (node == NULL) { | |
f73fabfd | 485 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
d31d3e8c | 486 | goto end; |
2f77fc4b DG |
487 | } |
488 | ||
489 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
490 | ||
3c442be3 | 491 | nb_event = lttng_ht_get_count(uchan->events); |
2f77fc4b DG |
492 | if (nb_event == 0) { |
493 | ret = nb_event; | |
b4e3ceb9 | 494 | *total_size = 0; |
d31d3e8c | 495 | goto end; |
2f77fc4b DG |
496 | } |
497 | ||
498 | DBG3("Listing UST global %d events", nb_event); | |
499 | ||
b4e3ceb9 PP |
500 | /* Compute required extended infos size */ |
501 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
502 | if (uevent->internal) { | |
503 | nb_event--; | |
504 | continue; | |
505 | } | |
506 | ||
507 | increment_extended_len(uevent->filter_expression, | |
795d57ce | 508 | uevent->exclusion, &extended_len); |
b4e3ceb9 | 509 | } |
d31d3e8c PP |
510 | if (nb_event == 0) { |
511 | /* All events are internal, skip. */ | |
512 | ret = 0; | |
513 | *total_size = 0; | |
514 | goto end; | |
515 | } | |
b4e3ceb9 PP |
516 | |
517 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
518 | tmp = zmalloc(*total_size); | |
2f77fc4b | 519 | if (tmp == NULL) { |
b12c38df JG |
520 | ret = -LTTNG_ERR_FATAL; |
521 | goto end; | |
2f77fc4b DG |
522 | } |
523 | ||
b4e3ceb9 PP |
524 | extended_at = ((uint8_t *) tmp) + nb_event * sizeof(struct lttng_event); |
525 | ||
2f77fc4b | 526 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
3c442be3 JG |
527 | if (uevent->internal) { |
528 | /* This event should remain hidden from clients */ | |
3c442be3 JG |
529 | continue; |
530 | } | |
2f77fc4b DG |
531 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
532 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
533 | tmp[i].enabled = uevent->enabled; | |
534 | ||
535 | switch (uevent->attr.instrumentation) { | |
536 | case LTTNG_UST_TRACEPOINT: | |
537 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
538 | break; | |
539 | case LTTNG_UST_PROBE: | |
540 | tmp[i].type = LTTNG_EVENT_PROBE; | |
541 | break; | |
542 | case LTTNG_UST_FUNCTION: | |
543 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
544 | break; | |
545 | } | |
546 | ||
547 | tmp[i].loglevel = uevent->attr.loglevel; | |
548 | switch (uevent->attr.loglevel_type) { | |
549 | case LTTNG_UST_LOGLEVEL_ALL: | |
550 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
551 | break; | |
552 | case LTTNG_UST_LOGLEVEL_RANGE: | |
553 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
554 | break; | |
555 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
556 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
557 | break; | |
558 | } | |
559 | if (uevent->filter) { | |
560 | tmp[i].filter = 1; | |
561 | } | |
4634f12e JI |
562 | if (uevent->exclusion) { |
563 | tmp[i].exclusion = 1; | |
564 | } | |
2f77fc4b | 565 | i++; |
b4e3ceb9 PP |
566 | |
567 | /* Append extended info */ | |
795d57ce PP |
568 | append_extended_info(uevent->filter_expression, |
569 | uevent->exclusion, &extended_at); | |
2f77fc4b DG |
570 | } |
571 | ||
572 | ret = nb_event; | |
573 | *events = tmp; | |
d31d3e8c | 574 | end: |
2f77fc4b DG |
575 | rcu_read_unlock(); |
576 | return ret; | |
577 | } | |
578 | ||
579 | /* | |
580 | * Fill lttng_event array of all kernel events in the channel. | |
581 | */ | |
582 | static int list_lttng_kernel_events(char *channel_name, | |
b4e3ceb9 PP |
583 | struct ltt_kernel_session *kernel_session, |
584 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
585 | { |
586 | int i = 0, ret; | |
587 | unsigned int nb_event; | |
588 | struct ltt_kernel_event *event; | |
589 | struct ltt_kernel_channel *kchan; | |
b4e3ceb9 PP |
590 | size_t extended_len = 0; |
591 | void *extended_at; | |
2f77fc4b DG |
592 | |
593 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
594 | if (kchan == NULL) { | |
f73fabfd | 595 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
596 | goto error; |
597 | } | |
598 | ||
599 | nb_event = kchan->event_count; | |
600 | ||
601 | DBG("Listing events for channel %s", kchan->channel->name); | |
602 | ||
603 | if (nb_event == 0) { | |
b4e3ceb9 | 604 | *total_size = 0; |
834978fd | 605 | *events = NULL; |
db906c12 | 606 | goto end; |
2f77fc4b DG |
607 | } |
608 | ||
b4e3ceb9 PP |
609 | /* Compute required extended infos size */ |
610 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { | |
795d57ce PP |
611 | increment_extended_len(event->filter_expression, NULL, |
612 | &extended_len); | |
b4e3ceb9 PP |
613 | } |
614 | ||
615 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
616 | *events = zmalloc(*total_size); | |
2f77fc4b | 617 | if (*events == NULL) { |
f73fabfd | 618 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
619 | goto error; |
620 | } | |
621 | ||
ab4aa612 | 622 | extended_at = ((void *) *events) + |
b4e3ceb9 PP |
623 | nb_event * sizeof(struct lttng_event); |
624 | ||
2f77fc4b DG |
625 | /* Kernel channels */ |
626 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
627 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
628 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
629 | (*events)[i].enabled = event->enabled; | |
00f992f2 JG |
630 | (*events)[i].filter = |
631 | (unsigned char) !!event->filter_expression; | |
2f77fc4b DG |
632 | |
633 | switch (event->event->instrumentation) { | |
634 | case LTTNG_KERNEL_TRACEPOINT: | |
635 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
636 | break; | |
2f77fc4b | 637 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
638 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
639 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
640 | sizeof(struct lttng_kernel_kprobe)); | |
641 | break; | |
642 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
643 | (*events)[i].type = LTTNG_EVENT_PROBE; |
644 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
645 | sizeof(struct lttng_kernel_kprobe)); | |
646 | break; | |
647 | case LTTNG_KERNEL_FUNCTION: | |
648 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
649 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
650 | sizeof(struct lttng_kernel_function)); | |
651 | break; | |
652 | case LTTNG_KERNEL_NOOP: | |
653 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
654 | break; | |
655 | case LTTNG_KERNEL_SYSCALL: | |
656 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
657 | break; | |
658 | case LTTNG_KERNEL_ALL: | |
659 | assert(0); | |
660 | break; | |
661 | } | |
662 | i++; | |
b4e3ceb9 PP |
663 | |
664 | /* Append extended info */ | |
795d57ce PP |
665 | append_extended_info(event->filter_expression, NULL, |
666 | &extended_at); | |
2f77fc4b DG |
667 | } |
668 | ||
db906c12 | 669 | end: |
2f77fc4b DG |
670 | return nb_event; |
671 | ||
672 | error: | |
f73fabfd DG |
673 | /* Negate the error code to differentiate the size from an error */ |
674 | return -ret; | |
2f77fc4b DG |
675 | } |
676 | ||
677 | /* | |
678 | * Add URI so the consumer output object. Set the correct path depending on the | |
679 | * domain adding the default trace directory. | |
680 | */ | |
681 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
56a37563 JG |
682 | struct lttng_uri *uri, enum lttng_domain_type domain, |
683 | const char *session_name) | |
2f77fc4b | 684 | { |
f73fabfd | 685 | int ret = LTTNG_OK; |
2f77fc4b DG |
686 | const char *default_trace_dir; |
687 | ||
688 | assert(uri); | |
689 | ||
690 | if (consumer == NULL) { | |
691 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 692 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
693 | goto error; |
694 | } | |
695 | ||
696 | switch (domain) { | |
697 | case LTTNG_DOMAIN_KERNEL: | |
698 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
699 | break; | |
700 | case LTTNG_DOMAIN_UST: | |
701 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
702 | break; | |
703 | default: | |
704 | /* | |
705 | * This case is possible is we try to add the URI to the global tracing | |
706 | * session consumer object which in this case there is no subdir. | |
707 | */ | |
708 | default_trace_dir = ""; | |
709 | } | |
710 | ||
711 | switch (uri->dtype) { | |
712 | case LTTNG_DST_IPV4: | |
713 | case LTTNG_DST_IPV6: | |
714 | DBG2("Setting network URI to consumer"); | |
715 | ||
df75acac DG |
716 | if (consumer->type == CONSUMER_DST_NET) { |
717 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
718 | consumer->dst.net.control_isset) || |
719 | (uri->stype == LTTNG_STREAM_DATA && | |
720 | consumer->dst.net.data_isset)) { | |
df75acac DG |
721 | ret = LTTNG_ERR_URL_EXIST; |
722 | goto error; | |
723 | } | |
724 | } else { | |
725 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
726 | } |
727 | ||
df75acac DG |
728 | consumer->type = CONSUMER_DST_NET; |
729 | ||
2f77fc4b DG |
730 | /* Set URI into consumer output object */ |
731 | ret = consumer_set_network_uri(consumer, uri); | |
732 | if (ret < 0) { | |
a74934ba | 733 | ret = -ret; |
2f77fc4b DG |
734 | goto error; |
735 | } else if (ret == 1) { | |
736 | /* | |
737 | * URI was the same in the consumer so we do not append the subdir | |
738 | * again so to not duplicate output dir. | |
739 | */ | |
f86c9f4e | 740 | ret = LTTNG_OK; |
2f77fc4b DG |
741 | goto error; |
742 | } | |
743 | ||
744 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
745 | ret = consumer_set_subdir(consumer, session_name); | |
746 | if (ret < 0) { | |
f73fabfd | 747 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
748 | goto error; |
749 | } | |
750 | } | |
751 | ||
752 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
753 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
754 | strncat(consumer->subdir, default_trace_dir, |
755 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
756 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
757 | } | |
758 | ||
759 | break; | |
760 | case LTTNG_DST_PATH: | |
761 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
762 | memset(consumer->dst.trace_path, 0, | |
763 | sizeof(consumer->dst.trace_path)); | |
9ac05d92 MD |
764 | /* Explicit length checks for strcpy and strcat. */ |
765 | if (strlen(uri->dst.path) + strlen(default_trace_dir) | |
766 | >= sizeof(consumer->dst.trace_path)) { | |
767 | ret = LTTNG_ERR_FATAL; | |
768 | goto error; | |
769 | } | |
770 | strcpy(consumer->dst.trace_path, uri->dst.path); | |
2f77fc4b | 771 | /* Append default trace dir */ |
9ac05d92 | 772 | strcat(consumer->dst.trace_path, default_trace_dir); |
2f77fc4b DG |
773 | /* Flag consumer as local. */ |
774 | consumer->type = CONSUMER_DST_LOCAL; | |
775 | break; | |
776 | } | |
777 | ||
a74934ba DG |
778 | ret = LTTNG_OK; |
779 | ||
2f77fc4b DG |
780 | error: |
781 | return ret; | |
782 | } | |
783 | ||
784 | /* | |
785 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
786 | */ | |
787 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
788 | { | |
789 | int ret = 0; | |
790 | struct lttng_ht_iter iter; | |
791 | struct consumer_socket *socket; | |
792 | ||
793 | assert(session); | |
794 | ||
e7fe706f DG |
795 | rcu_read_lock(); |
796 | ||
2f77fc4b DG |
797 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
798 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
799 | socket, node.node) { | |
2f77fc4b | 800 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 801 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
802 | pthread_mutex_unlock(socket->lock); |
803 | if (ret < 0) { | |
f73fabfd | 804 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
805 | goto error; |
806 | } | |
807 | } | |
808 | } | |
809 | ||
810 | error: | |
e7fe706f | 811 | rcu_read_unlock(); |
2f77fc4b DG |
812 | return ret; |
813 | } | |
814 | ||
815 | /* | |
816 | * Create a socket to the relayd using the URI. | |
817 | * | |
818 | * On success, the relayd_sock pointer is set to the created socket. | |
819 | * Else, it's stays untouched and a lttcomm error code is returned. | |
820 | */ | |
6151a90f | 821 | static int create_connect_relayd(struct lttng_uri *uri, |
b31610f2 JD |
822 | struct lttcomm_relayd_sock **relayd_sock, |
823 | struct consumer_output *consumer) | |
2f77fc4b DG |
824 | { |
825 | int ret; | |
6151a90f | 826 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 827 | |
6151a90f JD |
828 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
829 | RELAYD_VERSION_COMM_MINOR); | |
830 | if (!rsock) { | |
f73fabfd | 831 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
832 | goto error; |
833 | } | |
834 | ||
ffe60014 DG |
835 | /* |
836 | * Connect to relayd so we can proceed with a session creation. This call | |
837 | * can possibly block for an arbitrary amount of time to set the health | |
838 | * state to be in poll execution. | |
839 | */ | |
840 | health_poll_entry(); | |
6151a90f | 841 | ret = relayd_connect(rsock); |
ffe60014 | 842 | health_poll_exit(); |
2f77fc4b DG |
843 | if (ret < 0) { |
844 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 845 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
846 | goto free_sock; |
847 | } | |
848 | ||
849 | /* Create socket for control stream. */ | |
850 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
851 | DBG3("Creating relayd stream socket from URI"); | |
852 | ||
853 | /* Check relayd version */ | |
6151a90f | 854 | ret = relayd_version_check(rsock); |
2f77fc4b | 855 | if (ret < 0) { |
f73fabfd | 856 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
857 | goto close_sock; |
858 | } | |
b31610f2 JD |
859 | consumer->relay_major_version = rsock->major; |
860 | consumer->relay_minor_version = rsock->minor; | |
2f77fc4b DG |
861 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
862 | DBG3("Creating relayd data socket from URI"); | |
863 | } else { | |
864 | /* Command is not valid */ | |
865 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 866 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
867 | goto close_sock; |
868 | } | |
869 | ||
6151a90f | 870 | *relayd_sock = rsock; |
2f77fc4b | 871 | |
f73fabfd | 872 | return LTTNG_OK; |
2f77fc4b DG |
873 | |
874 | close_sock: | |
6151a90f JD |
875 | /* The returned value is not useful since we are on an error path. */ |
876 | (void) relayd_close(rsock); | |
2f77fc4b | 877 | free_sock: |
6151a90f | 878 | free(rsock); |
2f77fc4b DG |
879 | error: |
880 | return ret; | |
881 | } | |
882 | ||
883 | /* | |
884 | * Connect to the relayd using URI and send the socket to the right consumer. | |
885 | */ | |
56a37563 JG |
886 | static int send_consumer_relayd_socket(enum lttng_domain_type domain, |
887 | unsigned int session_id, struct lttng_uri *relayd_uri, | |
888 | struct consumer_output *consumer, | |
d3e2ba59 JD |
889 | struct consumer_socket *consumer_sock, |
890 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
891 | { |
892 | int ret; | |
6151a90f | 893 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 894 | |
ffe60014 | 895 | /* Connect to relayd and make version check if uri is the control. */ |
b31610f2 | 896 | ret = create_connect_relayd(relayd_uri, &rsock, consumer); |
ffe60014 | 897 | if (ret != LTTNG_OK) { |
6151a90f | 898 | goto error; |
ffe60014 | 899 | } |
6151a90f | 900 | assert(rsock); |
ffe60014 | 901 | |
2f77fc4b | 902 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
903 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
904 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
905 | /* |
906 | * Increment net_seq_idx because we are about to transfer the | |
907 | * new relayd socket to the consumer. | |
d88aee68 | 908 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 909 | */ |
d88aee68 DG |
910 | consumer->net_seq_index = ++relayd_net_seq_idx; |
911 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
912 | } |
913 | ||
2f77fc4b | 914 | /* Send relayd socket to consumer. */ |
6151a90f | 915 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
916 | relayd_uri->stype, session_id, |
917 | session_name, hostname, session_live_timer); | |
2f77fc4b | 918 | if (ret < 0) { |
f73fabfd | 919 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
920 | goto close_sock; |
921 | } | |
922 | ||
c890b720 DG |
923 | /* Flag that the corresponding socket was sent. */ |
924 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 925 | consumer_sock->control_sock_sent = 1; |
c890b720 | 926 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 927 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
928 | } |
929 | ||
f73fabfd | 930 | ret = LTTNG_OK; |
2f77fc4b DG |
931 | |
932 | /* | |
933 | * Close socket which was dup on the consumer side. The session daemon does | |
934 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
935 | */ | |
936 | ||
937 | close_sock: | |
6151a90f JD |
938 | (void) relayd_close(rsock); |
939 | free(rsock); | |
2f77fc4b | 940 | |
6151a90f | 941 | error: |
ffe60014 DG |
942 | if (ret != LTTNG_OK) { |
943 | /* | |
d9078d0c DG |
944 | * The consumer output for this session should not be used anymore |
945 | * since the relayd connection failed thus making any tracing or/and | |
946 | * streaming not usable. | |
ffe60014 | 947 | */ |
d9078d0c | 948 | consumer->enabled = 0; |
ffe60014 | 949 | } |
2f77fc4b DG |
950 | return ret; |
951 | } | |
952 | ||
953 | /* | |
954 | * Send both relayd sockets to a specific consumer and domain. This is a | |
955 | * helper function to facilitate sending the information to the consumer for a | |
956 | * session. | |
957 | */ | |
56a37563 JG |
958 | static int send_consumer_relayd_sockets(enum lttng_domain_type domain, |
959 | unsigned int session_id, struct consumer_output *consumer, | |
960 | struct consumer_socket *sock, char *session_name, | |
961 | char *hostname, int session_live_timer) | |
2f77fc4b | 962 | { |
dda67f6c | 963 | int ret = LTTNG_OK; |
2f77fc4b | 964 | |
2f77fc4b | 965 | assert(consumer); |
6dc3064a | 966 | assert(sock); |
2f77fc4b | 967 | |
2f77fc4b | 968 | /* Sending control relayd socket. */ |
ffe60014 | 969 | if (!sock->control_sock_sent) { |
6dc3064a | 970 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
971 | &consumer->dst.net.control, consumer, sock, |
972 | session_name, hostname, session_live_timer); | |
c890b720 DG |
973 | if (ret != LTTNG_OK) { |
974 | goto error; | |
975 | } | |
2f77fc4b DG |
976 | } |
977 | ||
978 | /* Sending data relayd socket. */ | |
ffe60014 | 979 | if (!sock->data_sock_sent) { |
6dc3064a | 980 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
981 | &consumer->dst.net.data, consumer, sock, |
982 | session_name, hostname, session_live_timer); | |
c890b720 DG |
983 | if (ret != LTTNG_OK) { |
984 | goto error; | |
985 | } | |
2f77fc4b DG |
986 | } |
987 | ||
2f77fc4b DG |
988 | error: |
989 | return ret; | |
990 | } | |
991 | ||
992 | /* | |
993 | * Setup relayd connections for a tracing session. First creates the socket to | |
994 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
995 | * network. | |
996 | */ | |
ffe60014 | 997 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 998 | { |
f73fabfd | 999 | int ret = LTTNG_OK; |
2f77fc4b DG |
1000 | struct ltt_ust_session *usess; |
1001 | struct ltt_kernel_session *ksess; | |
1002 | struct consumer_socket *socket; | |
1003 | struct lttng_ht_iter iter; | |
1004 | ||
1005 | assert(session); | |
1006 | ||
1007 | usess = session->ust_session; | |
1008 | ksess = session->kernel_session; | |
1009 | ||
785d2d0d | 1010 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1011 | |
e7fe706f DG |
1012 | rcu_read_lock(); |
1013 | ||
2f77fc4b DG |
1014 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
1015 | && usess->consumer->enabled) { | |
1016 | /* For each consumer socket, send relayd sockets */ | |
1017 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
1018 | socket, node.node) { | |
2f77fc4b | 1019 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1020 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
1021 | usess->consumer, socket, |
1022 | session->name, session->hostname, | |
1023 | session->live_timer); | |
2f77fc4b | 1024 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1025 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1026 | goto error; |
1027 | } | |
6dc3064a DG |
1028 | /* Session is now ready for network streaming. */ |
1029 | session->net_handle = 1; | |
2f77fc4b | 1030 | } |
b31610f2 JD |
1031 | session->consumer->relay_major_version = |
1032 | usess->consumer->relay_major_version; | |
1033 | session->consumer->relay_minor_version = | |
1034 | usess->consumer->relay_minor_version; | |
2f77fc4b DG |
1035 | } |
1036 | ||
1037 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
1038 | && ksess->consumer->enabled) { | |
1039 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
1040 | socket, node.node) { | |
2f77fc4b | 1041 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1042 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
1043 | ksess->consumer, socket, |
1044 | session->name, session->hostname, | |
1045 | session->live_timer); | |
2f77fc4b | 1046 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1047 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1048 | goto error; |
1049 | } | |
6dc3064a DG |
1050 | /* Session is now ready for network streaming. */ |
1051 | session->net_handle = 1; | |
2f77fc4b | 1052 | } |
b31610f2 JD |
1053 | session->consumer->relay_major_version = |
1054 | ksess->consumer->relay_major_version; | |
1055 | session->consumer->relay_minor_version = | |
1056 | ksess->consumer->relay_minor_version; | |
2f77fc4b DG |
1057 | } |
1058 | ||
1059 | error: | |
e7fe706f | 1060 | rcu_read_unlock(); |
2f77fc4b DG |
1061 | return ret; |
1062 | } | |
1063 | ||
9b6c7ec5 DG |
1064 | /* |
1065 | * Start a kernel session by opening all necessary streams. | |
1066 | */ | |
1067 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
1068 | { | |
1069 | int ret; | |
1070 | struct ltt_kernel_channel *kchan; | |
1071 | ||
1072 | /* Open kernel metadata */ | |
07b86b52 | 1073 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
1074 | ret = kernel_open_metadata(ksess); |
1075 | if (ret < 0) { | |
1076 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1077 | goto error; | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | /* Open kernel metadata stream */ | |
07b86b52 | 1082 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1083 | ret = kernel_open_metadata_stream(ksess); |
1084 | if (ret < 0) { | |
1085 | ERR("Kernel create metadata stream failed"); | |
1086 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1087 | goto error; | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | /* For each channel */ | |
1092 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1093 | if (kchan->stream_count == 0) { | |
1094 | ret = kernel_open_channel_stream(kchan); | |
1095 | if (ret < 0) { | |
1096 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1097 | goto error; | |
1098 | } | |
1099 | /* Update the stream global counter */ | |
1100 | ksess->stream_count_global += ret; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | /* Setup kernel consumer socket and send fds to it */ | |
1105 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1106 | if (ret != 0) { |
9b6c7ec5 DG |
1107 | ret = LTTNG_ERR_KERN_START_FAIL; |
1108 | goto error; | |
1109 | } | |
1110 | ||
1111 | /* This start the kernel tracing */ | |
1112 | ret = kernel_start_session(ksess); | |
1113 | if (ret < 0) { | |
1114 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1115 | goto error; | |
1116 | } | |
1117 | ||
1118 | /* Quiescent wait after starting trace */ | |
784303b0 | 1119 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 1120 | |
14fb1ebe | 1121 | ksess->active = 1; |
9b6c7ec5 DG |
1122 | |
1123 | ret = LTTNG_OK; | |
1124 | ||
1125 | error: | |
1126 | return ret; | |
1127 | } | |
1128 | ||
2f77fc4b DG |
1129 | /* |
1130 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1131 | */ | |
56a37563 JG |
1132 | int cmd_disable_channel(struct ltt_session *session, |
1133 | enum lttng_domain_type domain, char *channel_name) | |
2f77fc4b DG |
1134 | { |
1135 | int ret; | |
1136 | struct ltt_ust_session *usess; | |
1137 | ||
1138 | usess = session->ust_session; | |
1139 | ||
2223c96f DG |
1140 | rcu_read_lock(); |
1141 | ||
2f77fc4b DG |
1142 | switch (domain) { |
1143 | case LTTNG_DOMAIN_KERNEL: | |
1144 | { | |
1145 | ret = channel_kernel_disable(session->kernel_session, | |
1146 | channel_name); | |
f73fabfd | 1147 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1148 | goto error; |
1149 | } | |
1150 | ||
1151 | kernel_wait_quiescent(kernel_tracer_fd); | |
1152 | break; | |
1153 | } | |
1154 | case LTTNG_DOMAIN_UST: | |
1155 | { | |
1156 | struct ltt_ust_channel *uchan; | |
1157 | struct lttng_ht *chan_ht; | |
1158 | ||
1159 | chan_ht = usess->domain_global.channels; | |
1160 | ||
1161 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
1162 | if (uchan == NULL) { | |
f73fabfd | 1163 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1164 | goto error; |
1165 | } | |
1166 | ||
7972aab2 | 1167 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1168 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1169 | goto error; |
1170 | } | |
1171 | break; | |
1172 | } | |
2f77fc4b | 1173 | default: |
f73fabfd | 1174 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1175 | goto error; |
1176 | } | |
1177 | ||
f73fabfd | 1178 | ret = LTTNG_OK; |
2f77fc4b DG |
1179 | |
1180 | error: | |
2223c96f | 1181 | rcu_read_unlock(); |
2f77fc4b DG |
1182 | return ret; |
1183 | } | |
1184 | ||
ccf10263 MD |
1185 | /* |
1186 | * Command LTTNG_TRACK_PID processed by the client thread. | |
a9ad0c8f MD |
1187 | * |
1188 | * Called with session lock held. | |
ccf10263 | 1189 | */ |
56a37563 JG |
1190 | int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain, |
1191 | int pid) | |
ccf10263 MD |
1192 | { |
1193 | int ret; | |
1194 | ||
1195 | rcu_read_lock(); | |
1196 | ||
1197 | switch (domain) { | |
1198 | case LTTNG_DOMAIN_KERNEL: | |
1199 | { | |
1200 | struct ltt_kernel_session *ksess; | |
1201 | ||
1202 | ksess = session->kernel_session; | |
1203 | ||
1204 | ret = kernel_track_pid(ksess, pid); | |
1205 | if (ret != LTTNG_OK) { | |
1206 | goto error; | |
1207 | } | |
1208 | ||
1209 | kernel_wait_quiescent(kernel_tracer_fd); | |
1210 | break; | |
1211 | } | |
ccf10263 | 1212 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
1213 | { |
1214 | struct ltt_ust_session *usess; | |
1215 | ||
1216 | usess = session->ust_session; | |
1217 | ||
1218 | ret = trace_ust_track_pid(usess, pid); | |
1219 | if (ret != LTTNG_OK) { | |
1220 | goto error; | |
1221 | } | |
1222 | break; | |
1223 | } | |
ccf10263 MD |
1224 | default: |
1225 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1226 | goto error; | |
1227 | } | |
1228 | ||
1229 | ret = LTTNG_OK; | |
1230 | ||
1231 | error: | |
1232 | rcu_read_unlock(); | |
1233 | return ret; | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Command LTTNG_UNTRACK_PID processed by the client thread. | |
a9ad0c8f MD |
1238 | * |
1239 | * Called with session lock held. | |
ccf10263 | 1240 | */ |
56a37563 JG |
1241 | int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain, |
1242 | int pid) | |
ccf10263 MD |
1243 | { |
1244 | int ret; | |
1245 | ||
1246 | rcu_read_lock(); | |
1247 | ||
1248 | switch (domain) { | |
1249 | case LTTNG_DOMAIN_KERNEL: | |
1250 | { | |
1251 | struct ltt_kernel_session *ksess; | |
1252 | ||
1253 | ksess = session->kernel_session; | |
1254 | ||
1255 | ret = kernel_untrack_pid(ksess, pid); | |
1256 | if (ret != LTTNG_OK) { | |
1257 | goto error; | |
1258 | } | |
1259 | ||
1260 | kernel_wait_quiescent(kernel_tracer_fd); | |
1261 | break; | |
1262 | } | |
ccf10263 | 1263 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
1264 | { |
1265 | struct ltt_ust_session *usess; | |
1266 | ||
1267 | usess = session->ust_session; | |
1268 | ||
1269 | ret = trace_ust_untrack_pid(usess, pid); | |
1270 | if (ret != LTTNG_OK) { | |
1271 | goto error; | |
1272 | } | |
1273 | break; | |
1274 | } | |
ccf10263 MD |
1275 | default: |
1276 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1277 | goto error; | |
1278 | } | |
1279 | ||
1280 | ret = LTTNG_OK; | |
1281 | ||
1282 | error: | |
1283 | rcu_read_unlock(); | |
1284 | return ret; | |
1285 | } | |
1286 | ||
2f77fc4b DG |
1287 | /* |
1288 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1289 | * | |
1290 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1291 | */ | |
1292 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 1293 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
1294 | { |
1295 | int ret; | |
1296 | struct ltt_ust_session *usess = session->ust_session; | |
1297 | struct lttng_ht *chan_ht; | |
1f345e94 | 1298 | size_t len; |
2f77fc4b DG |
1299 | |
1300 | assert(session); | |
1301 | assert(attr); | |
7972aab2 | 1302 | assert(domain); |
2f77fc4b | 1303 | |
f5436bfc | 1304 | len = lttng_strnlen(attr->name, sizeof(attr->name)); |
1f345e94 PP |
1305 | |
1306 | /* Validate channel name */ | |
1307 | if (attr->name[0] == '.' || | |
1308 | memchr(attr->name, '/', len) != NULL) { | |
1309 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1310 | goto end; | |
1311 | } | |
1312 | ||
2f77fc4b DG |
1313 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
1314 | ||
03b4fdcf DG |
1315 | rcu_read_lock(); |
1316 | ||
ecc48a90 JD |
1317 | /* |
1318 | * Don't try to enable a channel if the session has been started at | |
1319 | * some point in time before. The tracer does not allow it. | |
1320 | */ | |
8382cf6f | 1321 | if (session->has_been_started) { |
ecc48a90 JD |
1322 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1323 | goto error; | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * If the session is a live session, remove the switch timer, the | |
1328 | * live timer does the same thing but sends also synchronisation | |
1329 | * beacons for inactive streams. | |
1330 | */ | |
1331 | if (session->live_timer > 0) { | |
1332 | attr->attr.live_timer_interval = session->live_timer; | |
1333 | attr->attr.switch_timer_interval = 0; | |
1334 | } | |
1335 | ||
7972aab2 | 1336 | switch (domain->type) { |
2f77fc4b DG |
1337 | case LTTNG_DOMAIN_KERNEL: |
1338 | { | |
1339 | struct ltt_kernel_channel *kchan; | |
1340 | ||
2f77fc4b DG |
1341 | kchan = trace_kernel_get_channel_by_name(attr->name, |
1342 | session->kernel_session); | |
1343 | if (kchan == NULL) { | |
1344 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
1345 | if (attr->name[0] != '\0') { |
1346 | session->kernel_session->has_non_default_channel = 1; | |
1347 | } | |
2f77fc4b DG |
1348 | } else { |
1349 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1350 | } | |
1351 | ||
f73fabfd | 1352 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1353 | goto error; |
1354 | } | |
1355 | ||
784303b0 | 1356 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
1357 | break; |
1358 | } | |
1359 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1360 | case LTTNG_DOMAIN_JUL: |
1361 | case LTTNG_DOMAIN_LOG4J: | |
1362 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1363 | { |
1364 | struct ltt_ust_channel *uchan; | |
1365 | ||
9232818f JG |
1366 | /* |
1367 | * FIXME | |
1368 | * | |
1369 | * Current agent implementation limitations force us to allow | |
1370 | * only one channel at once in "agent" subdomains. Each | |
1371 | * subdomain has a default channel name which must be strictly | |
1372 | * adhered to. | |
1373 | */ | |
1374 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
1375 | if (strncmp(attr->name, DEFAULT_JUL_CHANNEL_NAME, | |
1376 | LTTNG_SYMBOL_NAME_LEN)) { | |
1377 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1378 | goto error; | |
1379 | } | |
1380 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
1381 | if (strncmp(attr->name, DEFAULT_LOG4J_CHANNEL_NAME, | |
1382 | LTTNG_SYMBOL_NAME_LEN)) { | |
1383 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1384 | goto error; | |
1385 | } | |
1386 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
1387 | if (strncmp(attr->name, DEFAULT_PYTHON_CHANNEL_NAME, | |
1388 | LTTNG_SYMBOL_NAME_LEN)) { | |
1389 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1390 | goto error; | |
1391 | } | |
1392 | } | |
1393 | ||
2f77fc4b DG |
1394 | chan_ht = usess->domain_global.channels; |
1395 | ||
1396 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
1397 | if (uchan == NULL) { | |
7972aab2 | 1398 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
1399 | if (attr->name[0] != '\0') { |
1400 | usess->has_non_default_channel = 1; | |
1401 | } | |
2f77fc4b | 1402 | } else { |
7972aab2 | 1403 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1404 | } |
1405 | break; | |
1406 | } | |
2f77fc4b | 1407 | default: |
f73fabfd | 1408 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1409 | goto error; |
1410 | } | |
1411 | ||
1412 | error: | |
2223c96f | 1413 | rcu_read_unlock(); |
1f345e94 | 1414 | end: |
2f77fc4b DG |
1415 | return ret; |
1416 | } | |
1417 | ||
2f77fc4b DG |
1418 | /* |
1419 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1420 | */ | |
56a37563 JG |
1421 | int cmd_disable_event(struct ltt_session *session, |
1422 | enum lttng_domain_type domain, char *channel_name, | |
6e911cad | 1423 | struct lttng_event *event) |
2f77fc4b DG |
1424 | { |
1425 | int ret; | |
6e911cad MD |
1426 | char *event_name; |
1427 | ||
18a720cd MD |
1428 | DBG("Disable event command for event \'%s\'", event->name); |
1429 | ||
6e911cad MD |
1430 | event_name = event->name; |
1431 | ||
9b7431cf JG |
1432 | /* Error out on unhandled search criteria */ |
1433 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad | 1434 | || event->pid || event->filter || event->exclusion) { |
7076b56e JG |
1435 | ret = LTTNG_ERR_UNK; |
1436 | goto error; | |
6e911cad | 1437 | } |
2f77fc4b | 1438 | |
2223c96f DG |
1439 | rcu_read_lock(); |
1440 | ||
2f77fc4b DG |
1441 | switch (domain) { |
1442 | case LTTNG_DOMAIN_KERNEL: | |
1443 | { | |
1444 | struct ltt_kernel_channel *kchan; | |
1445 | struct ltt_kernel_session *ksess; | |
1446 | ||
1447 | ksess = session->kernel_session; | |
1448 | ||
85076754 MD |
1449 | /* |
1450 | * If a non-default channel has been created in the | |
1451 | * session, explicitely require that -c chan_name needs | |
1452 | * to be provided. | |
1453 | */ | |
1454 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1455 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1456 | goto error_unlock; |
85076754 MD |
1457 | } |
1458 | ||
2f77fc4b DG |
1459 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1460 | if (kchan == NULL) { | |
f73fabfd | 1461 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1462 | goto error_unlock; |
2f77fc4b DG |
1463 | } |
1464 | ||
6e911cad MD |
1465 | switch (event->type) { |
1466 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1467 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1468 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1469 | case LTTNG_EVENT_PROBE: |
1470 | case LTTNG_EVENT_FUNCTION: | |
1471 | case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ | |
1472 | if (event_name[0] == '\0') { | |
1473 | ret = event_kernel_disable_event(kchan, | |
1474 | NULL, event->type); | |
29c62722 | 1475 | } else { |
d0ae4ea8 | 1476 | ret = event_kernel_disable_event(kchan, |
9550ee81 | 1477 | event_name, event->type); |
29c62722 | 1478 | } |
6e911cad | 1479 | if (ret != LTTNG_OK) { |
7076b56e | 1480 | goto error_unlock; |
6e911cad MD |
1481 | } |
1482 | break; | |
6e911cad MD |
1483 | default: |
1484 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1485 | goto error_unlock; |
2f77fc4b DG |
1486 | } |
1487 | ||
1488 | kernel_wait_quiescent(kernel_tracer_fd); | |
1489 | break; | |
1490 | } | |
1491 | case LTTNG_DOMAIN_UST: | |
1492 | { | |
1493 | struct ltt_ust_channel *uchan; | |
1494 | struct ltt_ust_session *usess; | |
1495 | ||
1496 | usess = session->ust_session; | |
1497 | ||
7076b56e JG |
1498 | if (validate_ust_event_name(event_name)) { |
1499 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1500 | goto error_unlock; | |
1501 | } | |
1502 | ||
85076754 MD |
1503 | /* |
1504 | * If a non-default channel has been created in the | |
9550ee81 | 1505 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1506 | * to be provided. |
1507 | */ | |
1508 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1509 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1510 | goto error_unlock; |
85076754 MD |
1511 | } |
1512 | ||
2f77fc4b DG |
1513 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1514 | channel_name); | |
1515 | if (uchan == NULL) { | |
f73fabfd | 1516 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1517 | goto error_unlock; |
2f77fc4b DG |
1518 | } |
1519 | ||
6e911cad MD |
1520 | switch (event->type) { |
1521 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1522 | /* |
1523 | * An empty event name means that everything | |
1524 | * should be disabled. | |
1525 | */ | |
1526 | if (event->name[0] == '\0') { | |
1527 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 JR |
1528 | } else { |
1529 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1530 | event_name); | |
1531 | } | |
6e911cad | 1532 | if (ret != LTTNG_OK) { |
7076b56e | 1533 | goto error_unlock; |
6e911cad MD |
1534 | } |
1535 | break; | |
1536 | default: | |
1537 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1538 | goto error_unlock; |
2f77fc4b DG |
1539 | } |
1540 | ||
1541 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1542 | channel_name); | |
1543 | break; | |
1544 | } | |
5cdb6027 | 1545 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1546 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1547 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1548 | { |
fefd409b | 1549 | struct agent *agt; |
f20baf8e DG |
1550 | struct ltt_ust_session *usess = session->ust_session; |
1551 | ||
1552 | assert(usess); | |
1553 | ||
6e911cad MD |
1554 | switch (event->type) { |
1555 | case LTTNG_EVENT_ALL: | |
1556 | break; | |
1557 | default: | |
1558 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1559 | goto error_unlock; |
6e911cad MD |
1560 | } |
1561 | ||
5cdb6027 | 1562 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1563 | if (!agt) { |
1564 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1565 | goto error_unlock; |
fefd409b | 1566 | } |
b3639870 JR |
1567 | /* |
1568 | * An empty event name means that everything | |
1569 | * should be disabled. | |
1570 | */ | |
1571 | if (event->name[0] == '\0') { | |
18a720cd MD |
1572 | ret = event_agent_disable_all(usess, agt); |
1573 | } else { | |
1574 | ret = event_agent_disable(usess, agt, event_name); | |
1575 | } | |
f20baf8e | 1576 | if (ret != LTTNG_OK) { |
7076b56e | 1577 | goto error_unlock; |
f20baf8e DG |
1578 | } |
1579 | ||
1580 | break; | |
1581 | } | |
2f77fc4b | 1582 | default: |
f73fabfd | 1583 | ret = LTTNG_ERR_UND; |
7076b56e | 1584 | goto error_unlock; |
2f77fc4b DG |
1585 | } |
1586 | ||
f73fabfd | 1587 | ret = LTTNG_OK; |
2f77fc4b | 1588 | |
7076b56e | 1589 | error_unlock: |
2223c96f | 1590 | rcu_read_unlock(); |
7076b56e | 1591 | error: |
2f77fc4b DG |
1592 | return ret; |
1593 | } | |
1594 | ||
2f77fc4b DG |
1595 | /* |
1596 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1597 | */ | |
56a37563 | 1598 | int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain, |
601d5acf | 1599 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1600 | { |
d5979e4a | 1601 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
bdf64013 JG |
1602 | char *app_ctx_provider_name = NULL, *app_ctx_name = NULL; |
1603 | ||
1604 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
1605 | app_ctx_provider_name = ctx->u.app_ctx.provider_name; | |
1606 | app_ctx_name = ctx->u.app_ctx.ctx_name; | |
1607 | } | |
2f77fc4b DG |
1608 | |
1609 | switch (domain) { | |
1610 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1611 | assert(session->kernel_session); |
1612 | ||
1613 | if (session->kernel_session->channel_count == 0) { | |
1614 | /* Create default channel */ | |
1615 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1616 | if (ret != LTTNG_OK) { | |
1617 | goto error; | |
1618 | } | |
d5979e4a | 1619 | chan_kern_created = 1; |
979e618e | 1620 | } |
2f77fc4b | 1621 | /* Add kernel context to kernel tracer */ |
601d5acf | 1622 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1623 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1624 | goto error; |
1625 | } | |
1626 | break; | |
bdf64013 JG |
1627 | case LTTNG_DOMAIN_JUL: |
1628 | case LTTNG_DOMAIN_LOG4J: | |
1629 | { | |
1630 | /* | |
1631 | * Validate channel name. | |
1632 | * If no channel name is given and the domain is JUL or LOG4J, | |
1633 | * set it to the appropriate domain-specific channel name. If | |
1634 | * a name is provided but does not match the expexted channel | |
1635 | * name, return an error. | |
1636 | */ | |
1637 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
1638 | strcmp(channel_name, | |
1639 | DEFAULT_JUL_CHANNEL_NAME)) { | |
1640 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1641 | goto error; | |
1642 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
1643 | strcmp(channel_name, | |
1644 | DEFAULT_LOG4J_CHANNEL_NAME)) { | |
1645 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1646 | goto error; | |
1647 | } | |
a93b3916 | 1648 | /* break is _not_ missing here. */ |
bdf64013 | 1649 | } |
2f77fc4b DG |
1650 | case LTTNG_DOMAIN_UST: |
1651 | { | |
1652 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1653 | unsigned int chan_count; |
1654 | ||
2f77fc4b DG |
1655 | assert(usess); |
1656 | ||
85076754 | 1657 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1658 | if (chan_count == 0) { |
1659 | struct lttng_channel *attr; | |
1660 | /* Create default channel */ | |
0a9c6494 | 1661 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1662 | if (attr == NULL) { |
1663 | ret = LTTNG_ERR_FATAL; | |
1664 | goto error; | |
1665 | } | |
1666 | ||
7972aab2 | 1667 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1668 | if (ret != LTTNG_OK) { |
1669 | free(attr); | |
1670 | goto error; | |
1671 | } | |
1672 | free(attr); | |
d5979e4a | 1673 | chan_ust_created = 1; |
979e618e DG |
1674 | } |
1675 | ||
601d5acf | 1676 | ret = context_ust_add(usess, domain, ctx, channel_name); |
bdf64013 JG |
1677 | free(app_ctx_provider_name); |
1678 | free(app_ctx_name); | |
1679 | app_ctx_name = NULL; | |
1680 | app_ctx_provider_name = NULL; | |
f73fabfd | 1681 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1682 | goto error; |
1683 | } | |
1684 | break; | |
1685 | } | |
2f77fc4b | 1686 | default: |
f73fabfd | 1687 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1688 | goto error; |
1689 | } | |
1690 | ||
bdf64013 JG |
1691 | ret = LTTNG_OK; |
1692 | goto end; | |
2f77fc4b DG |
1693 | |
1694 | error: | |
d5979e4a DG |
1695 | if (chan_kern_created) { |
1696 | struct ltt_kernel_channel *kchan = | |
1697 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1698 | session->kernel_session); | |
1699 | /* Created previously, this should NOT fail. */ | |
1700 | assert(kchan); | |
1701 | kernel_destroy_channel(kchan); | |
1702 | } | |
1703 | ||
1704 | if (chan_ust_created) { | |
1705 | struct ltt_ust_channel *uchan = | |
1706 | trace_ust_find_channel_by_name( | |
1707 | session->ust_session->domain_global.channels, | |
1708 | DEFAULT_CHANNEL_NAME); | |
1709 | /* Created previously, this should NOT fail. */ | |
1710 | assert(uchan); | |
1711 | /* Remove from the channel list of the session. */ | |
1712 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1713 | uchan); | |
1714 | trace_ust_destroy_channel(uchan); | |
1715 | } | |
bdf64013 JG |
1716 | end: |
1717 | free(app_ctx_provider_name); | |
1718 | free(app_ctx_name); | |
2f77fc4b DG |
1719 | return ret; |
1720 | } | |
1721 | ||
dac8e046 JG |
1722 | static inline bool name_starts_with(const char *name, const char *prefix) |
1723 | { | |
1724 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
1725 | ||
1726 | return !strncmp(name, prefix, max_cmp_len); | |
1727 | } | |
1728 | ||
1729 | /* Perform userspace-specific event name validation */ | |
1730 | static int validate_ust_event_name(const char *name) | |
1731 | { | |
1732 | int ret = 0; | |
1733 | ||
1734 | if (!name) { | |
1735 | ret = -1; | |
1736 | goto end; | |
1737 | } | |
1738 | ||
1739 | /* | |
1740 | * Check name against all internal UST event component namespaces used | |
1741 | * by the agents. | |
1742 | */ | |
1743 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
1744 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
1745 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
1746 | ret = -1; | |
1747 | } | |
1748 | ||
1749 | end: | |
1750 | return ret; | |
1751 | } | |
88f06f15 | 1752 | |
2f77fc4b | 1753 | /* |
88f06f15 JG |
1754 | * Internal version of cmd_enable_event() with a supplemental |
1755 | * "internal_event" flag which is used to enable internal events which should | |
1756 | * be hidden from clients. Such events are used in the agent implementation to | |
1757 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 1758 | */ |
88f06f15 JG |
1759 | static int _cmd_enable_event(struct ltt_session *session, |
1760 | struct lttng_domain *domain, | |
025faf73 | 1761 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1762 | char *filter_expression, |
db8f1377 JI |
1763 | struct lttng_filter_bytecode *filter, |
1764 | struct lttng_event_exclusion *exclusion, | |
88f06f15 | 1765 | int wpipe, bool internal_event) |
2f77fc4b | 1766 | { |
2a5656c6 | 1767 | int ret = 0, channel_created = 0; |
cfedea03 | 1768 | struct lttng_channel *attr = NULL; |
2f77fc4b DG |
1769 | |
1770 | assert(session); | |
1771 | assert(event); | |
1772 | assert(channel_name); | |
1773 | ||
2a385866 JG |
1774 | /* If we have a filter, we must have its filter expression */ |
1775 | assert(!(!!filter_expression ^ !!filter)); | |
1776 | ||
2a5656c6 PP |
1777 | /* Normalize event name as a globbing pattern */ |
1778 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 1779 | |
2a5656c6 PP |
1780 | /* Normalize exclusion names as globbing patterns */ |
1781 | if (exclusion) { | |
1782 | size_t i; | |
f5ac4bd7 | 1783 | |
2a5656c6 PP |
1784 | for (i = 0; i < exclusion->count; i++) { |
1785 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
1786 | ||
1787 | strutils_normalize_star_glob_pattern(name); | |
1788 | } | |
930a2e99 JG |
1789 | } |
1790 | ||
2a5656c6 PP |
1791 | DBG("Enable event command for event \'%s\'", event->name); |
1792 | ||
1793 | rcu_read_lock(); | |
1794 | ||
7972aab2 | 1795 | switch (domain->type) { |
2f77fc4b DG |
1796 | case LTTNG_DOMAIN_KERNEL: |
1797 | { | |
1798 | struct ltt_kernel_channel *kchan; | |
1799 | ||
85076754 MD |
1800 | /* |
1801 | * If a non-default channel has been created in the | |
1802 | * session, explicitely require that -c chan_name needs | |
1803 | * to be provided. | |
1804 | */ | |
1805 | if (session->kernel_session->has_non_default_channel | |
1806 | && channel_name[0] == '\0') { | |
1807 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1808 | goto error; | |
1809 | } | |
1810 | ||
2f77fc4b DG |
1811 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1812 | session->kernel_session); | |
1813 | if (kchan == NULL) { | |
0a9c6494 DG |
1814 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1815 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1816 | if (attr == NULL) { |
f73fabfd | 1817 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1818 | goto error; |
1819 | } | |
04c17253 MD |
1820 | if (lttng_strncpy(attr->name, channel_name, |
1821 | sizeof(attr->name))) { | |
1822 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
1823 | goto error; |
1824 | } | |
2f77fc4b DG |
1825 | |
1826 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1827 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1828 | goto error; |
1829 | } | |
e5f5db7f | 1830 | channel_created = 1; |
2f77fc4b DG |
1831 | } |
1832 | ||
1833 | /* Get the newly created kernel channel pointer */ | |
1834 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1835 | session->kernel_session); | |
1836 | if (kchan == NULL) { | |
1837 | /* This sould not happen... */ | |
f73fabfd | 1838 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1839 | goto error; |
1840 | } | |
1841 | ||
6e911cad MD |
1842 | switch (event->type) { |
1843 | case LTTNG_EVENT_ALL: | |
29c62722 | 1844 | { |
00a62084 MD |
1845 | char *filter_expression_a = NULL; |
1846 | struct lttng_filter_bytecode *filter_a = NULL; | |
1847 | ||
1848 | /* | |
1849 | * We need to duplicate filter_expression and filter, | |
1850 | * because ownership is passed to first enable | |
1851 | * event. | |
1852 | */ | |
1853 | if (filter_expression) { | |
1854 | filter_expression_a = strdup(filter_expression); | |
1855 | if (!filter_expression_a) { | |
1856 | ret = LTTNG_ERR_FATAL; | |
1857 | goto error; | |
1858 | } | |
1859 | } | |
1860 | if (filter) { | |
1861 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
1862 | if (!filter_a) { | |
1863 | free(filter_expression_a); | |
1864 | ret = LTTNG_ERR_FATAL; | |
1865 | goto error; | |
1866 | } | |
1867 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
1868 | } | |
29c62722 | 1869 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
1870 | ret = event_kernel_enable_event(kchan, event, |
1871 | filter_expression, filter); | |
a969e101 MD |
1872 | /* We have passed ownership */ |
1873 | filter_expression = NULL; | |
1874 | filter = NULL; | |
29c62722 MD |
1875 | if (ret != LTTNG_OK) { |
1876 | if (channel_created) { | |
1877 | /* Let's not leak a useless channel. */ | |
1878 | kernel_destroy_channel(kchan); | |
1879 | } | |
00a62084 MD |
1880 | free(filter_expression_a); |
1881 | free(filter_a); | |
29c62722 MD |
1882 | goto error; |
1883 | } | |
1884 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
1885 | ret = event_kernel_enable_event(kchan, event, |
1886 | filter_expression_a, filter_a); | |
60d21fa2 AB |
1887 | /* We have passed ownership */ |
1888 | filter_expression_a = NULL; | |
1889 | filter_a = NULL; | |
29c62722 MD |
1890 | if (ret != LTTNG_OK) { |
1891 | goto error; | |
1892 | } | |
1893 | break; | |
1894 | } | |
6e6ef3d7 DG |
1895 | case LTTNG_EVENT_PROBE: |
1896 | case LTTNG_EVENT_FUNCTION: | |
1897 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 1898 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
1899 | ret = event_kernel_enable_event(kchan, event, |
1900 | filter_expression, filter); | |
a969e101 MD |
1901 | /* We have passed ownership */ |
1902 | filter_expression = NULL; | |
1903 | filter = NULL; | |
6e911cad MD |
1904 | if (ret != LTTNG_OK) { |
1905 | if (channel_created) { | |
1906 | /* Let's not leak a useless channel. */ | |
1907 | kernel_destroy_channel(kchan); | |
1908 | } | |
1909 | goto error; | |
e5f5db7f | 1910 | } |
6e911cad MD |
1911 | break; |
1912 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
1913 | ret = event_kernel_enable_event(kchan, event, |
1914 | filter_expression, filter); | |
a969e101 MD |
1915 | /* We have passed ownership */ |
1916 | filter_expression = NULL; | |
1917 | filter = NULL; | |
e2b957af MD |
1918 | if (ret != LTTNG_OK) { |
1919 | goto error; | |
1920 | } | |
6e911cad MD |
1921 | break; |
1922 | default: | |
1923 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1924 | goto error; |
1925 | } | |
1926 | ||
1927 | kernel_wait_quiescent(kernel_tracer_fd); | |
1928 | break; | |
1929 | } | |
1930 | case LTTNG_DOMAIN_UST: | |
1931 | { | |
1932 | struct ltt_ust_channel *uchan; | |
1933 | struct ltt_ust_session *usess = session->ust_session; | |
1934 | ||
1935 | assert(usess); | |
1936 | ||
85076754 MD |
1937 | /* |
1938 | * If a non-default channel has been created in the | |
1939 | * session, explicitely require that -c chan_name needs | |
1940 | * to be provided. | |
1941 | */ | |
1942 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1943 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1944 | goto error; | |
1945 | } | |
1946 | ||
2f77fc4b DG |
1947 | /* Get channel from global UST domain */ |
1948 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1949 | channel_name); | |
1950 | if (uchan == NULL) { | |
1951 | /* Create default channel */ | |
0a9c6494 DG |
1952 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1953 | usess->buffer_type); | |
2f77fc4b | 1954 | if (attr == NULL) { |
f73fabfd | 1955 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1956 | goto error; |
1957 | } | |
04c17253 MD |
1958 | if (lttng_strncpy(attr->name, channel_name, |
1959 | sizeof(attr->name))) { | |
1960 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
1961 | goto error; |
1962 | } | |
2f77fc4b DG |
1963 | |
1964 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1965 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1966 | goto error; |
1967 | } | |
2f77fc4b DG |
1968 | |
1969 | /* Get the newly created channel reference back */ | |
1970 | uchan = trace_ust_find_channel_by_name( | |
1971 | usess->domain_global.channels, channel_name); | |
1972 | assert(uchan); | |
1973 | } | |
1974 | ||
141feb8c JG |
1975 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
1976 | /* | |
1977 | * Don't allow users to add UST events to channels which | |
1978 | * are assigned to a userspace subdomain (JUL, Log4J, | |
1979 | * Python, etc.). | |
1980 | */ | |
1981 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
1982 | goto error; | |
1983 | } | |
1984 | ||
dac8e046 JG |
1985 | if (!internal_event) { |
1986 | /* | |
1987 | * Ensure the event name is not reserved for internal | |
1988 | * use. | |
1989 | */ | |
1990 | ret = validate_ust_event_name(event->name); | |
1991 | if (ret) { | |
1992 | WARN("Userspace event name %s failed validation.", | |
1993 | event->name ? | |
1994 | event->name : "NULL"); | |
1995 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1996 | goto error; | |
1997 | } | |
1998 | } | |
1999 | ||
2f77fc4b | 2000 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 2001 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
88f06f15 JG |
2002 | filter_expression, filter, exclusion, |
2003 | internal_event); | |
49d21f93 MD |
2004 | /* We have passed ownership */ |
2005 | filter_expression = NULL; | |
2006 | filter = NULL; | |
2007 | exclusion = NULL; | |
94382e15 JG |
2008 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2009 | goto already_enabled; | |
2010 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2011 | goto error; |
2012 | } | |
2013 | break; | |
2014 | } | |
5cdb6027 | 2015 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2016 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2017 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2018 | { |
da6c3a50 | 2019 | const char *default_event_name, *default_chan_name; |
fefd409b | 2020 | struct agent *agt; |
f20baf8e DG |
2021 | struct lttng_event uevent; |
2022 | struct lttng_domain tmp_dom; | |
2023 | struct ltt_ust_session *usess = session->ust_session; | |
2024 | ||
2025 | assert(usess); | |
2026 | ||
5cdb6027 | 2027 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2028 | if (!agt) { |
5cdb6027 | 2029 | agt = agent_create(domain->type); |
fefd409b | 2030 | if (!agt) { |
e5b3c48c | 2031 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2032 | goto error; |
2033 | } | |
2034 | agent_add(agt, usess->agents); | |
2035 | } | |
2036 | ||
022d91ba | 2037 | /* Create the default tracepoint. */ |
996de3c7 | 2038 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2039 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2040 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
51755dc8 JG |
2041 | default_event_name = event_get_default_agent_ust_name( |
2042 | domain->type); | |
da6c3a50 | 2043 | if (!default_event_name) { |
e5b3c48c | 2044 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2045 | goto error; |
f43f95a9 | 2046 | } |
da6c3a50 | 2047 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2048 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2049 | ||
2050 | /* | |
2051 | * The domain type is changed because we are about to enable the | |
2052 | * default channel and event for the JUL domain that are hardcoded. | |
2053 | * This happens in the UST domain. | |
2054 | */ | |
2055 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2056 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2057 | ||
0e115563 DG |
2058 | switch (domain->type) { |
2059 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2060 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2061 | break; |
2062 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2063 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2064 | break; |
2065 | case LTTNG_DOMAIN_PYTHON: | |
2066 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2067 | break; | |
2068 | default: | |
e98a44b0 | 2069 | /* The switch/case we are in makes this impossible */ |
0e115563 | 2070 | assert(0); |
da6c3a50 DG |
2071 | } |
2072 | ||
971da06a | 2073 | { |
8404118c | 2074 | char *filter_expression_copy = NULL; |
51755dc8 | 2075 | struct lttng_filter_bytecode *filter_copy = NULL; |
971da06a JG |
2076 | |
2077 | if (filter) { | |
51755dc8 JG |
2078 | const size_t filter_size = sizeof( |
2079 | struct lttng_filter_bytecode) | |
2080 | + filter->len; | |
2081 | ||
2082 | filter_copy = zmalloc(filter_size); | |
971da06a | 2083 | if (!filter_copy) { |
018096a4 | 2084 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2085 | goto error; |
971da06a | 2086 | } |
51755dc8 | 2087 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2088 | |
8404118c JG |
2089 | filter_expression_copy = |
2090 | strdup(filter_expression); | |
2091 | if (!filter_expression) { | |
2092 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2093 | } |
2094 | ||
2095 | if (!filter_expression_copy || !filter_copy) { | |
2096 | free(filter_expression_copy); | |
2097 | free(filter_copy); | |
2098 | goto error; | |
8404118c | 2099 | } |
971da06a JG |
2100 | } |
2101 | ||
88f06f15 | 2102 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a | 2103 | (char *) default_chan_name, |
8404118c JG |
2104 | &uevent, filter_expression_copy, |
2105 | filter_copy, NULL, wpipe); | |
971da06a JG |
2106 | } |
2107 | ||
94382e15 JG |
2108 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2109 | goto already_enabled; | |
2110 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2111 | goto error; |
2112 | } | |
2113 | ||
2114 | /* The wild card * means that everything should be enabled. */ | |
2115 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8404118c JG |
2116 | ret = event_agent_enable_all(usess, agt, event, filter, |
2117 | filter_expression); | |
f20baf8e | 2118 | } else { |
8404118c JG |
2119 | ret = event_agent_enable(usess, agt, event, filter, |
2120 | filter_expression); | |
f20baf8e | 2121 | } |
51755dc8 JG |
2122 | filter = NULL; |
2123 | filter_expression = NULL; | |
f20baf8e DG |
2124 | if (ret != LTTNG_OK) { |
2125 | goto error; | |
2126 | } | |
2127 | ||
2128 | break; | |
2129 | } | |
2f77fc4b | 2130 | default: |
f73fabfd | 2131 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2132 | goto error; |
2133 | } | |
2134 | ||
f73fabfd | 2135 | ret = LTTNG_OK; |
2f77fc4b | 2136 | |
94382e15 | 2137 | already_enabled: |
2f77fc4b | 2138 | error: |
49d21f93 MD |
2139 | free(filter_expression); |
2140 | free(filter); | |
2141 | free(exclusion); | |
cfedea03 | 2142 | free(attr); |
2223c96f | 2143 | rcu_read_unlock(); |
2f77fc4b DG |
2144 | return ret; |
2145 | } | |
2146 | ||
88f06f15 JG |
2147 | /* |
2148 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2149 | * We own filter, exclusion, and filter_expression. | |
2150 | */ | |
2151 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, | |
2152 | char *channel_name, struct lttng_event *event, | |
2153 | char *filter_expression, | |
2154 | struct lttng_filter_bytecode *filter, | |
2155 | struct lttng_event_exclusion *exclusion, | |
2156 | int wpipe) | |
2157 | { | |
2158 | return _cmd_enable_event(session, domain, channel_name, event, | |
2159 | filter_expression, filter, exclusion, wpipe, false); | |
2160 | } | |
2161 | ||
2162 | /* | |
2163 | * Enable an event which is internal to LTTng. An internal should | |
2164 | * never be made visible to clients and are immune to checks such as | |
2165 | * reserved names. | |
2166 | */ | |
2167 | static int cmd_enable_event_internal(struct ltt_session *session, | |
2168 | struct lttng_domain *domain, | |
2169 | char *channel_name, struct lttng_event *event, | |
2170 | char *filter_expression, | |
2171 | struct lttng_filter_bytecode *filter, | |
2172 | struct lttng_event_exclusion *exclusion, | |
2173 | int wpipe) | |
2174 | { | |
2175 | return _cmd_enable_event(session, domain, channel_name, event, | |
2176 | filter_expression, filter, exclusion, wpipe, true); | |
2177 | } | |
2178 | ||
2f77fc4b DG |
2179 | /* |
2180 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2181 | */ | |
56a37563 JG |
2182 | ssize_t cmd_list_tracepoints(enum lttng_domain_type domain, |
2183 | struct lttng_event **events) | |
2f77fc4b DG |
2184 | { |
2185 | int ret; | |
2186 | ssize_t nb_events = 0; | |
2187 | ||
2188 | switch (domain) { | |
2189 | case LTTNG_DOMAIN_KERNEL: | |
2190 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2191 | if (nb_events < 0) { | |
f73fabfd | 2192 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2193 | goto error; |
2194 | } | |
2195 | break; | |
2196 | case LTTNG_DOMAIN_UST: | |
2197 | nb_events = ust_app_list_events(events); | |
2198 | if (nb_events < 0) { | |
f73fabfd | 2199 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2200 | goto error; |
2201 | } | |
2202 | break; | |
5cdb6027 | 2203 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2204 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2205 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 2206 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
2207 | if (nb_events < 0) { |
2208 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2209 | goto error; | |
2210 | } | |
2211 | break; | |
2f77fc4b | 2212 | default: |
f73fabfd | 2213 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2214 | goto error; |
2215 | } | |
2216 | ||
2217 | return nb_events; | |
2218 | ||
2219 | error: | |
2220 | /* Return negative value to differentiate return code */ | |
2221 | return -ret; | |
2222 | } | |
2223 | ||
2224 | /* | |
2225 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2226 | */ | |
56a37563 | 2227 | ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
2f77fc4b DG |
2228 | struct lttng_event_field **fields) |
2229 | { | |
2230 | int ret; | |
2231 | ssize_t nb_fields = 0; | |
2232 | ||
2233 | switch (domain) { | |
2234 | case LTTNG_DOMAIN_UST: | |
2235 | nb_fields = ust_app_list_event_fields(fields); | |
2236 | if (nb_fields < 0) { | |
f73fabfd | 2237 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2238 | goto error; |
2239 | } | |
2240 | break; | |
2241 | case LTTNG_DOMAIN_KERNEL: | |
2242 | default: /* fall-through */ | |
f73fabfd | 2243 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2244 | goto error; |
2245 | } | |
2246 | ||
2247 | return nb_fields; | |
2248 | ||
2249 | error: | |
2250 | /* Return negative value to differentiate return code */ | |
2251 | return -ret; | |
2252 | } | |
2253 | ||
834978fd DG |
2254 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
2255 | { | |
2256 | return syscall_table_list(events); | |
2257 | } | |
2258 | ||
a5dfbb9d MD |
2259 | /* |
2260 | * Command LTTNG_LIST_TRACKER_PIDS processed by the client thread. | |
2261 | * | |
2262 | * Called with session lock held. | |
2263 | */ | |
2264 | ssize_t cmd_list_tracker_pids(struct ltt_session *session, | |
56a37563 | 2265 | enum lttng_domain_type domain, int32_t **pids) |
a5dfbb9d MD |
2266 | { |
2267 | int ret; | |
2268 | ssize_t nr_pids = 0; | |
2269 | ||
2270 | switch (domain) { | |
2271 | case LTTNG_DOMAIN_KERNEL: | |
2272 | { | |
2273 | struct ltt_kernel_session *ksess; | |
2274 | ||
2275 | ksess = session->kernel_session; | |
2276 | nr_pids = kernel_list_tracker_pids(ksess, pids); | |
2277 | if (nr_pids < 0) { | |
2278 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
2279 | goto error; | |
2280 | } | |
2281 | break; | |
2282 | } | |
2283 | case LTTNG_DOMAIN_UST: | |
2284 | { | |
2285 | struct ltt_ust_session *usess; | |
2286 | ||
2287 | usess = session->ust_session; | |
2288 | nr_pids = trace_ust_list_tracker_pids(usess, pids); | |
2289 | if (nr_pids < 0) { | |
2290 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2291 | goto error; | |
2292 | } | |
2293 | break; | |
2294 | } | |
2295 | case LTTNG_DOMAIN_LOG4J: | |
2296 | case LTTNG_DOMAIN_JUL: | |
2297 | case LTTNG_DOMAIN_PYTHON: | |
2298 | default: | |
2299 | ret = LTTNG_ERR_UND; | |
2300 | goto error; | |
2301 | } | |
2302 | ||
2303 | return nr_pids; | |
2304 | ||
2305 | error: | |
2306 | /* Return negative value to differentiate return code */ | |
2307 | return -ret; | |
2308 | } | |
2309 | ||
2f77fc4b DG |
2310 | /* |
2311 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2312 | * |
2313 | * Called with session mutex held. | |
2f77fc4b DG |
2314 | */ |
2315 | int cmd_start_trace(struct ltt_session *session) | |
2316 | { | |
2317 | int ret; | |
cde3e505 | 2318 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2319 | struct ltt_kernel_session *ksession; |
2320 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
2321 | |
2322 | assert(session); | |
2323 | ||
2324 | /* Ease our life a bit ;) */ | |
2325 | ksession = session->kernel_session; | |
2326 | usess = session->ust_session; | |
2327 | ||
8382cf6f DG |
2328 | /* Is the session already started? */ |
2329 | if (session->active) { | |
f73fabfd | 2330 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2331 | goto error; |
2332 | } | |
2333 | ||
cde3e505 DG |
2334 | /* |
2335 | * Starting a session without channel is useless since after that it's not | |
2336 | * possible to enable channel thus inform the client. | |
2337 | */ | |
2338 | if (usess && usess->domain_global.channels) { | |
2339 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2340 | } | |
2341 | if (ksession) { | |
2342 | nb_chan += ksession->channel_count; | |
2343 | } | |
2344 | if (!nb_chan) { | |
2345 | ret = LTTNG_ERR_NO_CHANNEL; | |
2346 | goto error; | |
2347 | } | |
2348 | ||
2f77fc4b DG |
2349 | /* Kernel tracing */ |
2350 | if (ksession != NULL) { | |
9b6c7ec5 DG |
2351 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
2352 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2353 | goto error; |
2354 | } | |
2f77fc4b DG |
2355 | } |
2356 | ||
2357 | /* Flag session that trace should start automatically */ | |
2358 | if (usess) { | |
14fb1ebe DG |
2359 | /* |
2360 | * Even though the start trace might fail, flag this session active so | |
2361 | * other application coming in are started by default. | |
2362 | */ | |
2363 | usess->active = 1; | |
2f77fc4b DG |
2364 | |
2365 | ret = ust_app_start_trace_all(usess); | |
2366 | if (ret < 0) { | |
f73fabfd | 2367 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2368 | goto error; |
2369 | } | |
2370 | } | |
2371 | ||
8382cf6f DG |
2372 | /* Flag this after a successful start. */ |
2373 | session->has_been_started = 1; | |
2374 | session->active = 1; | |
9b6c7ec5 | 2375 | |
f73fabfd | 2376 | ret = LTTNG_OK; |
2f77fc4b DG |
2377 | |
2378 | error: | |
2379 | return ret; | |
2380 | } | |
2381 | ||
2382 | /* | |
2383 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2384 | */ | |
2385 | int cmd_stop_trace(struct ltt_session *session) | |
2386 | { | |
2387 | int ret; | |
2388 | struct ltt_kernel_channel *kchan; | |
2389 | struct ltt_kernel_session *ksession; | |
2390 | struct ltt_ust_session *usess; | |
2391 | ||
2392 | assert(session); | |
2393 | ||
2394 | /* Short cut */ | |
2395 | ksession = session->kernel_session; | |
2396 | usess = session->ust_session; | |
2397 | ||
8382cf6f DG |
2398 | /* Session is not active. Skip everythong and inform the client. */ |
2399 | if (!session->active) { | |
f73fabfd | 2400 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2401 | goto error; |
2402 | } | |
2403 | ||
2f77fc4b | 2404 | /* Kernel tracer */ |
14fb1ebe | 2405 | if (ksession && ksession->active) { |
2f77fc4b DG |
2406 | DBG("Stop kernel tracing"); |
2407 | ||
566d8970 MD |
2408 | ret = kernel_stop_session(ksession); |
2409 | if (ret < 0) { | |
2410 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
2411 | goto error; | |
2412 | } | |
2413 | ||
2414 | kernel_wait_quiescent(kernel_tracer_fd); | |
2415 | ||
2416 | /* Flush metadata after stopping (if exists) */ | |
2f77fc4b DG |
2417 | if (ksession->metadata_stream_fd >= 0) { |
2418 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2419 | if (ret < 0) { | |
2420 | ERR("Kernel metadata flush failed"); | |
2421 | } | |
2422 | } | |
2423 | ||
566d8970 | 2424 | /* Flush all buffers after stopping */ |
2f77fc4b DG |
2425 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2426 | ret = kernel_flush_buffer(kchan); | |
2427 | if (ret < 0) { | |
2428 | ERR("Kernel flush buffer error"); | |
2429 | } | |
2430 | } | |
2431 | ||
14fb1ebe | 2432 | ksession->active = 0; |
2f77fc4b DG |
2433 | } |
2434 | ||
14fb1ebe DG |
2435 | if (usess && usess->active) { |
2436 | /* | |
2437 | * Even though the stop trace might fail, flag this session inactive so | |
2438 | * other application coming in are not started by default. | |
2439 | */ | |
2440 | usess->active = 0; | |
2f77fc4b DG |
2441 | |
2442 | ret = ust_app_stop_trace_all(usess); | |
2443 | if (ret < 0) { | |
f73fabfd | 2444 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2445 | goto error; |
2446 | } | |
2447 | } | |
2448 | ||
8382cf6f DG |
2449 | /* Flag inactive after a successful stop. */ |
2450 | session->active = 0; | |
f73fabfd | 2451 | ret = LTTNG_OK; |
2f77fc4b DG |
2452 | |
2453 | error: | |
2454 | return ret; | |
2455 | } | |
2456 | ||
2457 | /* | |
2458 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2459 | */ | |
bda32d56 JG |
2460 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, |
2461 | struct lttng_uri *uris) | |
2f77fc4b DG |
2462 | { |
2463 | int ret, i; | |
2464 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2465 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
2466 | |
2467 | assert(session); | |
2468 | assert(uris); | |
2469 | assert(nb_uri > 0); | |
2470 | ||
8382cf6f DG |
2471 | /* Can't set consumer URI if the session is active. */ |
2472 | if (session->active) { | |
f73fabfd | 2473 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2474 | goto error; |
2475 | } | |
2476 | ||
bda32d56 | 2477 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2478 | for (i = 0; i < nb_uri; i++) { |
bda32d56 JG |
2479 | ret = add_uri_to_consumer(session->consumer, |
2480 | &uris[i], 0, session->name); | |
a74934ba | 2481 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2482 | goto error; |
2483 | } | |
2f77fc4b DG |
2484 | } |
2485 | ||
bda32d56 JG |
2486 | /* Set UST session URIs */ |
2487 | if (session->ust_session) { | |
2488 | for (i = 0; i < nb_uri; i++) { | |
2489 | ret = add_uri_to_consumer( | |
2490 | session->ust_session->consumer, | |
2491 | &uris[i], LTTNG_DOMAIN_UST, | |
2492 | session->name); | |
2493 | if (ret != LTTNG_OK) { | |
2494 | goto error; | |
2495 | } | |
2496 | } | |
2497 | } | |
2498 | ||
2499 | /* Set kernel session URIs */ | |
2500 | if (session->kernel_session) { | |
2501 | for (i = 0; i < nb_uri; i++) { | |
2502 | ret = add_uri_to_consumer( | |
2503 | session->kernel_session->consumer, | |
2504 | &uris[i], LTTNG_DOMAIN_KERNEL, | |
2505 | session->name); | |
2506 | if (ret != LTTNG_OK) { | |
2507 | goto error; | |
2508 | } | |
2509 | } | |
2510 | } | |
2511 | ||
7ab70fe0 DG |
2512 | /* |
2513 | * Make sure to set the session in output mode after we set URI since a | |
2514 | * session can be created without URL (thus flagged in no output mode). | |
2515 | */ | |
2516 | session->output_traces = 1; | |
2517 | if (ksess) { | |
2518 | ksess->output_traces = 1; | |
bda32d56 JG |
2519 | } |
2520 | ||
2521 | if (usess) { | |
7ab70fe0 DG |
2522 | usess->output_traces = 1; |
2523 | } | |
2524 | ||
2f77fc4b | 2525 | /* All good! */ |
f73fabfd | 2526 | ret = LTTNG_OK; |
2f77fc4b DG |
2527 | |
2528 | error: | |
2529 | return ret; | |
2530 | } | |
2531 | ||
2532 | /* | |
2533 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2534 | */ | |
2535 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2536 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2537 | { |
2538 | int ret; | |
2f77fc4b DG |
2539 | struct ltt_session *session; |
2540 | ||
2541 | assert(name); | |
2bba9e53 | 2542 | assert(creds); |
785d2d0d | 2543 | |
2f77fc4b DG |
2544 | /* |
2545 | * Verify if the session already exist | |
2546 | * | |
2547 | * XXX: There is no need for the session lock list here since the caller | |
2548 | * (process_client_msg) is holding it. We might want to change that so a | |
2549 | * single command does not lock the entire session list. | |
2550 | */ | |
2551 | session = session_find_by_name(name); | |
2552 | if (session != NULL) { | |
f73fabfd | 2553 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2554 | goto find_error; |
2555 | } | |
2556 | ||
2557 | /* Create tracing session in the registry */ | |
dec56f6c | 2558 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2559 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2560 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2561 | goto session_error; |
2562 | } | |
2563 | ||
2564 | /* | |
2565 | * Get the newly created session pointer back | |
2566 | * | |
2567 | * XXX: There is no need for the session lock list here since the caller | |
2568 | * (process_client_msg) is holding it. We might want to change that so a | |
2569 | * single command does not lock the entire session list. | |
2570 | */ | |
2571 | session = session_find_by_name(name); | |
2572 | assert(session); | |
2573 | ||
ecc48a90 | 2574 | session->live_timer = live_timer; |
2f77fc4b DG |
2575 | /* Create default consumer output for the session not yet created. */ |
2576 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2577 | if (session->consumer == NULL) { | |
f73fabfd | 2578 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2579 | goto consumer_error; |
2580 | } | |
2581 | ||
2bba9e53 | 2582 | if (uris) { |
bda32d56 | 2583 | ret = cmd_set_consumer_uri(session, nb_uri, uris); |
2bba9e53 DG |
2584 | if (ret != LTTNG_OK) { |
2585 | goto consumer_error; | |
2586 | } | |
2587 | session->output_traces = 1; | |
2588 | } else { | |
2589 | session->output_traces = 0; | |
2590 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2591 | } |
2592 | ||
2593 | session->consumer->enabled = 1; | |
2594 | ||
f73fabfd | 2595 | return LTTNG_OK; |
2f77fc4b DG |
2596 | |
2597 | consumer_error: | |
2598 | session_destroy(session); | |
2599 | session_error: | |
2600 | find_error: | |
2601 | return ret; | |
2602 | } | |
2603 | ||
27babd3a DG |
2604 | /* |
2605 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2606 | */ | |
2607 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2608 | size_t nb_uri, lttng_sock_cred *creds) | |
2609 | { | |
2610 | int ret; | |
2611 | struct ltt_session *session; | |
2612 | struct snapshot_output *new_output = NULL; | |
2613 | ||
2614 | assert(name); | |
2615 | assert(creds); | |
2616 | ||
2617 | /* | |
2618 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2619 | * received are for a default snapshot output if one. | |
2620 | */ | |
ae58b817 | 2621 | ret = cmd_create_session_uri(name, NULL, 0, creds, 0); |
27babd3a DG |
2622 | if (ret != LTTNG_OK) { |
2623 | goto error; | |
2624 | } | |
2625 | ||
2626 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2627 | session = session_find_by_name(name); | |
2628 | assert(session); | |
2629 | ||
2630 | /* Flag session for snapshot mode. */ | |
2631 | session->snapshot_mode = 1; | |
2632 | ||
2633 | /* Skip snapshot output creation if no URI is given. */ | |
2634 | if (nb_uri == 0) { | |
2635 | goto end; | |
2636 | } | |
2637 | ||
2638 | new_output = snapshot_output_alloc(); | |
2639 | if (!new_output) { | |
2640 | ret = LTTNG_ERR_NOMEM; | |
2641 | goto error_snapshot_alloc; | |
2642 | } | |
2643 | ||
2644 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2645 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2646 | if (ret < 0) { | |
2647 | if (ret == -ENOMEM) { | |
2648 | ret = LTTNG_ERR_NOMEM; | |
2649 | } else { | |
2650 | ret = LTTNG_ERR_INVALID; | |
2651 | } | |
2652 | goto error_snapshot; | |
2653 | } | |
2654 | ||
2655 | rcu_read_lock(); | |
2656 | snapshot_add_output(&session->snapshot, new_output); | |
2657 | rcu_read_unlock(); | |
2658 | ||
2659 | end: | |
2660 | return LTTNG_OK; | |
2661 | ||
2662 | error_snapshot: | |
2663 | snapshot_output_destroy(new_output); | |
2664 | error_snapshot_alloc: | |
2665 | session_destroy(session); | |
2666 | error: | |
2667 | return ret; | |
2668 | } | |
2669 | ||
2f77fc4b DG |
2670 | /* |
2671 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
2672 | * |
2673 | * Called with session lock held. | |
2f77fc4b DG |
2674 | */ |
2675 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2676 | { | |
2677 | int ret; | |
2678 | struct ltt_ust_session *usess; | |
2679 | struct ltt_kernel_session *ksess; | |
2680 | ||
2681 | /* Safety net */ | |
2682 | assert(session); | |
2683 | ||
2684 | usess = session->ust_session; | |
2685 | ksess = session->kernel_session; | |
2686 | ||
2687 | /* Clean kernel session teardown */ | |
2688 | kernel_destroy_session(ksess); | |
2689 | ||
2690 | /* UST session teardown */ | |
2691 | if (usess) { | |
2692 | /* Close any relayd session */ | |
2693 | consumer_output_send_destroy_relayd(usess->consumer); | |
2694 | ||
2695 | /* Destroy every UST application related to this session. */ | |
2696 | ret = ust_app_destroy_trace_all(usess); | |
2697 | if (ret) { | |
2698 | ERR("Error in ust_app_destroy_trace_all"); | |
2699 | } | |
2700 | ||
2701 | /* Clean up the rest. */ | |
2702 | trace_ust_destroy_session(usess); | |
2703 | } | |
2704 | ||
2705 | /* | |
2706 | * Must notify the kernel thread here to update it's poll set in order to | |
2707 | * remove the channel(s)' fd just destroyed. | |
2708 | */ | |
2709 | ret = notify_thread_pipe(wpipe); | |
2710 | if (ret < 0) { | |
2711 | PERROR("write kernel poll pipe"); | |
2712 | } | |
2713 | ||
2714 | ret = session_destroy(session); | |
2715 | ||
2716 | return ret; | |
2717 | } | |
2718 | ||
2f77fc4b DG |
2719 | /* |
2720 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2721 | */ | |
56a37563 JG |
2722 | int cmd_register_consumer(struct ltt_session *session, |
2723 | enum lttng_domain_type domain, const char *sock_path, | |
2724 | struct consumer_data *cdata) | |
2f77fc4b DG |
2725 | { |
2726 | int ret, sock; | |
dd81b457 | 2727 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2728 | |
2729 | assert(session); | |
2730 | assert(cdata); | |
2731 | assert(sock_path); | |
2732 | ||
2733 | switch (domain) { | |
2734 | case LTTNG_DOMAIN_KERNEL: | |
2735 | { | |
2736 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2737 | ||
2738 | assert(ksess); | |
2739 | ||
2740 | /* Can't register a consumer if there is already one */ | |
2741 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2742 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2743 | goto error; |
2744 | } | |
2745 | ||
2746 | sock = lttcomm_connect_unix_sock(sock_path); | |
2747 | if (sock < 0) { | |
f73fabfd | 2748 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2749 | goto error; |
2750 | } | |
4ce514c4 | 2751 | cdata->cmd_sock = sock; |
2f77fc4b | 2752 | |
4ce514c4 | 2753 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2754 | if (socket == NULL) { |
f66c074c DG |
2755 | ret = close(sock); |
2756 | if (ret < 0) { | |
2757 | PERROR("close register consumer"); | |
2758 | } | |
4ce514c4 | 2759 | cdata->cmd_sock = -1; |
f73fabfd | 2760 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2761 | goto error; |
2762 | } | |
2763 | ||
2764 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2765 | if (socket->lock == NULL) { | |
2766 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2767 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2768 | goto error; |
2769 | } | |
2770 | pthread_mutex_init(socket->lock, NULL); | |
2771 | socket->registered = 1; | |
2772 | ||
2773 | rcu_read_lock(); | |
2774 | consumer_add_socket(socket, ksess->consumer); | |
2775 | rcu_read_unlock(); | |
2776 | ||
2777 | pthread_mutex_lock(&cdata->pid_mutex); | |
2778 | cdata->pid = -1; | |
2779 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2780 | ||
2781 | break; | |
2782 | } | |
2783 | default: | |
2784 | /* TODO: Userspace tracing */ | |
f73fabfd | 2785 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2786 | goto error; |
2787 | } | |
2788 | ||
dd81b457 | 2789 | return LTTNG_OK; |
2f77fc4b DG |
2790 | |
2791 | error: | |
dd81b457 DG |
2792 | if (socket) { |
2793 | consumer_destroy_socket(socket); | |
2794 | } | |
2f77fc4b DG |
2795 | return ret; |
2796 | } | |
2797 | ||
2798 | /* | |
2799 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2800 | */ | |
2801 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2802 | struct lttng_domain **domains) | |
2803 | { | |
2804 | int ret, index = 0; | |
2805 | ssize_t nb_dom = 0; | |
fefd409b DG |
2806 | struct agent *agt; |
2807 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2808 | |
2809 | if (session->kernel_session != NULL) { | |
2810 | DBG3("Listing domains found kernel domain"); | |
2811 | nb_dom++; | |
2812 | } | |
2813 | ||
2814 | if (session->ust_session != NULL) { | |
2815 | DBG3("Listing domains found UST global domain"); | |
2816 | nb_dom++; | |
3c6a091f | 2817 | |
e0a74f01 | 2818 | rcu_read_lock(); |
fefd409b DG |
2819 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2820 | agt, node.node) { | |
2821 | if (agt->being_used) { | |
2822 | nb_dom++; | |
2823 | } | |
3c6a091f | 2824 | } |
e0a74f01 | 2825 | rcu_read_unlock(); |
2f77fc4b DG |
2826 | } |
2827 | ||
fa64dfb4 JG |
2828 | if (!nb_dom) { |
2829 | goto end; | |
2830 | } | |
2831 | ||
2f77fc4b DG |
2832 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
2833 | if (*domains == NULL) { | |
f73fabfd | 2834 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2835 | goto error; |
2836 | } | |
2837 | ||
2838 | if (session->kernel_session != NULL) { | |
2839 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
b5edb9e8 PP |
2840 | |
2841 | /* Kernel session buffer type is always GLOBAL */ | |
2842 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
2843 | ||
2f77fc4b DG |
2844 | index++; |
2845 | } | |
2846 | ||
2847 | if (session->ust_session != NULL) { | |
2848 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2849 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2850 | index++; |
3c6a091f | 2851 | |
e0a74f01 | 2852 | rcu_read_lock(); |
fefd409b DG |
2853 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2854 | agt, node.node) { | |
2855 | if (agt->being_used) { | |
2856 | (*domains)[index].type = agt->domain; | |
2857 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2858 | index++; | |
2859 | } | |
3c6a091f | 2860 | } |
e0a74f01 | 2861 | rcu_read_unlock(); |
2f77fc4b | 2862 | } |
fa64dfb4 | 2863 | end: |
2f77fc4b DG |
2864 | return nb_dom; |
2865 | ||
2866 | error: | |
f73fabfd DG |
2867 | /* Return negative value to differentiate return code */ |
2868 | return -ret; | |
2f77fc4b DG |
2869 | } |
2870 | ||
2871 | ||
2872 | /* | |
2873 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2874 | */ | |
56a37563 JG |
2875 | ssize_t cmd_list_channels(enum lttng_domain_type domain, |
2876 | struct ltt_session *session, struct lttng_channel **channels) | |
2f77fc4b | 2877 | { |
53e367f9 | 2878 | ssize_t nb_chan = 0, payload_size = 0, ret; |
2f77fc4b DG |
2879 | |
2880 | switch (domain) { | |
2881 | case LTTNG_DOMAIN_KERNEL: | |
2882 | if (session->kernel_session != NULL) { | |
2883 | nb_chan = session->kernel_session->channel_count; | |
2884 | } | |
2885 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 | 2886 | if (nb_chan <= 0) { |
53e367f9 JG |
2887 | ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2888 | goto end; | |
c7d620a2 | 2889 | } |
2f77fc4b DG |
2890 | break; |
2891 | case LTTNG_DOMAIN_UST: | |
2892 | if (session->ust_session != NULL) { | |
7ffc31a2 | 2893 | rcu_read_lock(); |
2f77fc4b | 2894 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
2895 | session->ust_session->domain_global.channels); |
2896 | rcu_read_unlock(); | |
2f77fc4b DG |
2897 | } |
2898 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 2899 | if (nb_chan < 0) { |
53e367f9 JG |
2900 | ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2901 | goto end; | |
c7d620a2 | 2902 | } |
2f77fc4b DG |
2903 | break; |
2904 | default: | |
53e367f9 JG |
2905 | ret = -LTTNG_ERR_UND; |
2906 | goto end; | |
2f77fc4b DG |
2907 | } |
2908 | ||
2909 | if (nb_chan > 0) { | |
53e367f9 JG |
2910 | const size_t channel_size = sizeof(struct lttng_channel) + |
2911 | sizeof(struct lttcomm_channel_extended); | |
2912 | struct lttcomm_channel_extended *channel_exts; | |
2913 | ||
2914 | payload_size = nb_chan * channel_size; | |
2915 | *channels = zmalloc(payload_size); | |
2f77fc4b | 2916 | if (*channels == NULL) { |
53e367f9 JG |
2917 | ret = -LTTNG_ERR_FATAL; |
2918 | goto end; | |
2f77fc4b DG |
2919 | } |
2920 | ||
53e367f9 JG |
2921 | channel_exts = ((void *) *channels) + |
2922 | (nb_chan * sizeof(struct lttng_channel)); | |
2923 | list_lttng_channels(domain, session, *channels, channel_exts); | |
2924 | } else { | |
2925 | *channels = NULL; | |
2f77fc4b DG |
2926 | } |
2927 | ||
53e367f9 JG |
2928 | ret = payload_size; |
2929 | end: | |
2930 | return ret; | |
2f77fc4b DG |
2931 | } |
2932 | ||
2933 | /* | |
2934 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2935 | */ | |
56a37563 JG |
2936 | ssize_t cmd_list_events(enum lttng_domain_type domain, |
2937 | struct ltt_session *session, char *channel_name, | |
b4e3ceb9 | 2938 | struct lttng_event **events, size_t *total_size) |
2f77fc4b DG |
2939 | { |
2940 | int ret = 0; | |
2941 | ssize_t nb_event = 0; | |
2942 | ||
2943 | switch (domain) { | |
2944 | case LTTNG_DOMAIN_KERNEL: | |
2945 | if (session->kernel_session != NULL) { | |
2946 | nb_event = list_lttng_kernel_events(channel_name, | |
b4e3ceb9 PP |
2947 | session->kernel_session, events, |
2948 | total_size); | |
2f77fc4b DG |
2949 | } |
2950 | break; | |
2951 | case LTTNG_DOMAIN_UST: | |
2952 | { | |
2953 | if (session->ust_session != NULL) { | |
2954 | nb_event = list_lttng_ust_global_events(channel_name, | |
b4e3ceb9 PP |
2955 | &session->ust_session->domain_global, events, |
2956 | total_size); | |
2f77fc4b DG |
2957 | } |
2958 | break; | |
2959 | } | |
5cdb6027 | 2960 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2961 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2962 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 2963 | if (session->ust_session) { |
fefd409b DG |
2964 | struct lttng_ht_iter iter; |
2965 | struct agent *agt; | |
2966 | ||
b11feea5 | 2967 | rcu_read_lock(); |
fefd409b DG |
2968 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
2969 | &iter.iter, agt, node.node) { | |
1dfd9906 JG |
2970 | if (agt->domain == domain) { |
2971 | nb_event = list_lttng_agent_events( | |
b4e3ceb9 PP |
2972 | agt, events, |
2973 | total_size); | |
1dfd9906 JG |
2974 | break; |
2975 | } | |
fefd409b | 2976 | } |
b11feea5 | 2977 | rcu_read_unlock(); |
3c6a091f DG |
2978 | } |
2979 | break; | |
2f77fc4b | 2980 | default: |
f73fabfd | 2981 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2982 | goto error; |
2983 | } | |
2984 | ||
f73fabfd | 2985 | return nb_event; |
2f77fc4b DG |
2986 | |
2987 | error: | |
f73fabfd DG |
2988 | /* Return negative value to differentiate return code */ |
2989 | return -ret; | |
2f77fc4b DG |
2990 | } |
2991 | ||
2992 | /* | |
2993 | * Using the session list, filled a lttng_session array to send back to the | |
2994 | * client for session listing. | |
2995 | * | |
2996 | * The session list lock MUST be acquired before calling this function. Use | |
2997 | * session_lock_list() and session_unlock_list(). | |
2998 | */ | |
2999 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
3000 | gid_t gid) | |
3001 | { | |
3002 | int ret; | |
3003 | unsigned int i = 0; | |
3004 | struct ltt_session *session; | |
3005 | struct ltt_session_list *list = session_get_list(); | |
3006 | ||
3007 | DBG("Getting all available session for UID %d GID %d", | |
3008 | uid, gid); | |
3009 | /* | |
3010 | * Iterate over session list and append data after the control struct in | |
3011 | * the buffer. | |
3012 | */ | |
3013 | cds_list_for_each_entry(session, &list->head, list) { | |
3014 | /* | |
3015 | * Only list the sessions the user can control. | |
3016 | */ | |
3017 | if (!session_access_ok(session, uid, gid)) { | |
3018 | continue; | |
3019 | } | |
3020 | ||
3021 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3022 | struct ltt_ust_session *usess = session->ust_session; | |
3023 | ||
3024 | if (session->consumer->type == CONSUMER_DST_NET || | |
3025 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
3026 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3027 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 3028 | sizeof(sessions[i].path), session); |
2f77fc4b | 3029 | } else { |
dec56f6c | 3030 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
3031 | session->consumer->dst.trace_path); |
3032 | } | |
3033 | if (ret < 0) { | |
3034 | PERROR("snprintf session path"); | |
3035 | continue; | |
3036 | } | |
3037 | ||
3038 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
3039 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 3040 | sessions[i].enabled = session->active; |
2cbf8fed | 3041 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 3042 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
3043 | i++; |
3044 | } | |
3045 | } | |
3046 | ||
806e2684 | 3047 | /* |
6d805429 | 3048 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 3049 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 3050 | */ |
6d805429 | 3051 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
3052 | { |
3053 | int ret; | |
3054 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3055 | struct ltt_ust_session *usess = session->ust_session; | |
3056 | ||
3057 | assert(session); | |
3058 | ||
3059 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 3060 | if (session->active) { |
806e2684 DG |
3061 | ret = LTTNG_ERR_SESSION_STARTED; |
3062 | goto error; | |
3a89d11a DG |
3063 | } else { |
3064 | /* | |
3065 | * If stopped, just make sure we've started before else the above call | |
3066 | * will always send that there is data pending. | |
3067 | * | |
3068 | * The consumer assumes that when the data pending command is received, | |
3069 | * the trace has been started before or else no output data is written | |
3070 | * by the streams which is a condition for data pending. So, this is | |
3071 | * *VERY* important that we don't ask the consumer before a start | |
3072 | * trace. | |
3073 | */ | |
8382cf6f | 3074 | if (!session->has_been_started) { |
3a89d11a DG |
3075 | ret = 0; |
3076 | goto error; | |
3077 | } | |
806e2684 DG |
3078 | } |
3079 | ||
3080 | if (ksess && ksess->consumer) { | |
6d805429 DG |
3081 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
3082 | if (ret == 1) { | |
806e2684 DG |
3083 | /* Data is still being extracted for the kernel. */ |
3084 | goto error; | |
3085 | } | |
3086 | } | |
3087 | ||
3088 | if (usess && usess->consumer) { | |
6d805429 DG |
3089 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
3090 | if (ret == 1) { | |
806e2684 DG |
3091 | /* Data is still being extracted for the kernel. */ |
3092 | goto error; | |
3093 | } | |
3094 | } | |
3095 | ||
3096 | /* Data is ready to be read by a viewer */ | |
6d805429 | 3097 | ret = 0; |
806e2684 DG |
3098 | |
3099 | error: | |
3100 | return ret; | |
3101 | } | |
3102 | ||
6dc3064a DG |
3103 | /* |
3104 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
3105 | * | |
3106 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3107 | */ | |
3108 | int cmd_snapshot_add_output(struct ltt_session *session, | |
3109 | struct lttng_snapshot_output *output, uint32_t *id) | |
3110 | { | |
3111 | int ret; | |
3112 | struct snapshot_output *new_output; | |
3113 | ||
3114 | assert(session); | |
3115 | assert(output); | |
3116 | ||
3117 | DBG("Cmd snapshot add output for session %s", session->name); | |
3118 | ||
3119 | /* | |
903ef685 | 3120 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
3121 | */ |
3122 | if (session->output_traces) { | |
903ef685 | 3123 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3124 | goto error; |
3125 | } | |
3126 | ||
3127 | /* Only one output is allowed until we have the "tee" feature. */ | |
3128 | if (session->snapshot.nb_output == 1) { | |
3129 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
3130 | goto error; | |
3131 | } | |
3132 | ||
3133 | new_output = snapshot_output_alloc(); | |
3134 | if (!new_output) { | |
3135 | ret = LTTNG_ERR_NOMEM; | |
3136 | goto error; | |
3137 | } | |
3138 | ||
3139 | ret = snapshot_output_init(output->max_size, output->name, | |
3140 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
3141 | &session->snapshot); | |
3142 | if (ret < 0) { | |
3143 | if (ret == -ENOMEM) { | |
3144 | ret = LTTNG_ERR_NOMEM; | |
3145 | } else { | |
3146 | ret = LTTNG_ERR_INVALID; | |
3147 | } | |
3148 | goto free_error; | |
3149 | } | |
3150 | ||
6dc3064a DG |
3151 | rcu_read_lock(); |
3152 | snapshot_add_output(&session->snapshot, new_output); | |
3153 | if (id) { | |
3154 | *id = new_output->id; | |
3155 | } | |
3156 | rcu_read_unlock(); | |
3157 | ||
3158 | return LTTNG_OK; | |
3159 | ||
3160 | free_error: | |
3161 | snapshot_output_destroy(new_output); | |
3162 | error: | |
3163 | return ret; | |
3164 | } | |
3165 | ||
3166 | /* | |
3167 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
3168 | * | |
3169 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3170 | */ | |
3171 | int cmd_snapshot_del_output(struct ltt_session *session, | |
3172 | struct lttng_snapshot_output *output) | |
3173 | { | |
3174 | int ret; | |
eb240553 | 3175 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
3176 | |
3177 | assert(session); | |
3178 | assert(output); | |
3179 | ||
6dc3064a DG |
3180 | rcu_read_lock(); |
3181 | ||
3182 | /* | |
d3f14b8a MD |
3183 | * Permission denied to create an output if the session is not |
3184 | * set in no output mode. | |
6dc3064a DG |
3185 | */ |
3186 | if (session->output_traces) { | |
903ef685 | 3187 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3188 | goto error; |
3189 | } | |
3190 | ||
eb240553 DG |
3191 | if (output->id) { |
3192 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
3193 | session->name); | |
3194 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
3195 | } else if (*output->name != '\0') { | |
3196 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
3197 | session->name); | |
3198 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
3199 | } | |
6dc3064a DG |
3200 | if (!sout) { |
3201 | ret = LTTNG_ERR_INVALID; | |
3202 | goto error; | |
3203 | } | |
3204 | ||
3205 | snapshot_delete_output(&session->snapshot, sout); | |
3206 | snapshot_output_destroy(sout); | |
3207 | ret = LTTNG_OK; | |
3208 | ||
3209 | error: | |
3210 | rcu_read_unlock(); | |
3211 | return ret; | |
3212 | } | |
3213 | ||
3214 | /* | |
3215 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
3216 | * | |
3217 | * If no output is available, outputs is untouched and 0 is returned. | |
3218 | * | |
3219 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
3220 | */ | |
3221 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
3222 | struct lttng_snapshot_output **outputs) | |
3223 | { | |
3224 | int ret, idx = 0; | |
b223ca94 | 3225 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
3226 | struct lttng_ht_iter iter; |
3227 | struct snapshot_output *output; | |
3228 | ||
3229 | assert(session); | |
3230 | assert(outputs); | |
3231 | ||
3232 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
3233 | ||
3234 | /* | |
d3f14b8a MD |
3235 | * Permission denied to create an output if the session is not |
3236 | * set in no output mode. | |
6dc3064a DG |
3237 | */ |
3238 | if (session->output_traces) { | |
903ef685 JG |
3239 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
3240 | goto end; | |
6dc3064a DG |
3241 | } |
3242 | ||
3243 | if (session->snapshot.nb_output == 0) { | |
3244 | ret = 0; | |
903ef685 | 3245 | goto end; |
6dc3064a DG |
3246 | } |
3247 | ||
3248 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
3249 | if (!list) { | |
b223ca94 | 3250 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 3251 | goto end; |
6dc3064a DG |
3252 | } |
3253 | ||
3254 | /* Copy list from session to the new list object. */ | |
b223ca94 | 3255 | rcu_read_lock(); |
6dc3064a DG |
3256 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
3257 | output, node.node) { | |
3258 | assert(output->consumer); | |
3259 | list[idx].id = output->id; | |
3260 | list[idx].max_size = output->max_size; | |
6ce22875 MD |
3261 | if (lttng_strncpy(list[idx].name, output->name, |
3262 | sizeof(list[idx].name))) { | |
3263 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 3264 | goto error; |
6ce22875 | 3265 | } |
6dc3064a | 3266 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
6ce22875 MD |
3267 | if (lttng_strncpy(list[idx].ctrl_url, |
3268 | output->consumer->dst.trace_path, | |
3269 | sizeof(list[idx].ctrl_url))) { | |
3270 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 3271 | goto error; |
6ce22875 | 3272 | } |
6dc3064a DG |
3273 | } else { |
3274 | /* Control URI. */ | |
3275 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
3276 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
3277 | if (ret < 0) { | |
b223ca94 | 3278 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 3279 | goto error; |
6dc3064a DG |
3280 | } |
3281 | ||
3282 | /* Data URI. */ | |
3283 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
3284 | list[idx].data_url, sizeof(list[idx].data_url)); | |
3285 | if (ret < 0) { | |
b223ca94 | 3286 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 3287 | goto error; |
6dc3064a DG |
3288 | } |
3289 | } | |
3290 | idx++; | |
3291 | } | |
3292 | ||
3293 | *outputs = list; | |
b223ca94 JG |
3294 | list = NULL; |
3295 | ret = session->snapshot.nb_output; | |
6dc3064a | 3296 | error: |
903ef685 | 3297 | rcu_read_unlock(); |
b223ca94 | 3298 | free(list); |
903ef685 | 3299 | end: |
b223ca94 | 3300 | return ret; |
6dc3064a DG |
3301 | } |
3302 | ||
93ec662e JD |
3303 | /* |
3304 | * Check if we can regenerate the metadata for this session. | |
3305 | * Only kernel, UST per-uid and non-live sessions are supported. | |
3306 | * | |
3307 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
3308 | */ | |
3309 | static | |
eded6438 | 3310 | int check_regenerate_metadata_support(struct ltt_session *session) |
93ec662e JD |
3311 | { |
3312 | int ret; | |
3313 | ||
3314 | assert(session); | |
3315 | ||
3316 | if (session->live_timer != 0) { | |
3317 | ret = LTTNG_ERR_LIVE_SESSION; | |
3318 | goto end; | |
3319 | } | |
3320 | if (!session->active) { | |
3321 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
3322 | goto end; | |
3323 | } | |
3324 | if (session->ust_session) { | |
3325 | switch (session->ust_session->buffer_type) { | |
3326 | case LTTNG_BUFFER_PER_UID: | |
3327 | break; | |
3328 | case LTTNG_BUFFER_PER_PID: | |
3329 | ret = LTTNG_ERR_PER_PID_SESSION; | |
3330 | goto end; | |
3331 | default: | |
3332 | assert(0); | |
3333 | ret = LTTNG_ERR_UNK; | |
3334 | goto end; | |
3335 | } | |
3336 | } | |
3337 | if (session->consumer->type == CONSUMER_DST_NET && | |
3338 | session->consumer->relay_minor_version < 8) { | |
3339 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; | |
3340 | goto end; | |
3341 | } | |
3342 | ret = 0; | |
3343 | ||
3344 | end: | |
3345 | return ret; | |
3346 | } | |
3347 | ||
7802bae3 LL |
3348 | static |
3349 | int clear_metadata_file(int fd) | |
3350 | { | |
3351 | int ret; | |
3352 | ||
3353 | ret = lseek(fd, 0, SEEK_SET); | |
3354 | if (ret < 0) { | |
3355 | PERROR("lseek"); | |
3356 | goto end; | |
3357 | } | |
3358 | ||
3359 | ret = ftruncate(fd, 0); | |
3360 | if (ret < 0) { | |
3361 | PERROR("ftruncate"); | |
3362 | goto end; | |
3363 | } | |
3364 | ||
3365 | end: | |
3366 | return ret; | |
3367 | } | |
3368 | ||
93ec662e | 3369 | static |
eded6438 | 3370 | int ust_regenerate_metadata(struct ltt_ust_session *usess) |
93ec662e JD |
3371 | { |
3372 | int ret = 0; | |
3373 | struct buffer_reg_uid *uid_reg = NULL; | |
3374 | struct buffer_reg_session *session_reg = NULL; | |
3375 | ||
3376 | rcu_read_lock(); | |
3377 | cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { | |
3378 | struct ust_registry_session *registry; | |
3379 | struct ust_registry_channel *chan; | |
3380 | struct lttng_ht_iter iter_chan; | |
3381 | ||
3382 | session_reg = uid_reg->registry; | |
3383 | registry = session_reg->reg.ust; | |
3384 | ||
3385 | pthread_mutex_lock(®istry->lock); | |
3386 | registry->metadata_len_sent = 0; | |
3387 | memset(registry->metadata, 0, registry->metadata_alloc_len); | |
3388 | registry->metadata_len = 0; | |
3389 | registry->metadata_version++; | |
7802bae3 LL |
3390 | if (registry->metadata_fd > 0) { |
3391 | /* Clear the metadata file's content. */ | |
3392 | ret = clear_metadata_file(registry->metadata_fd); | |
3393 | if (ret) { | |
3394 | pthread_mutex_unlock(®istry->lock); | |
3395 | goto end; | |
3396 | } | |
3397 | } | |
3398 | ||
93ec662e JD |
3399 | ret = ust_metadata_session_statedump(registry, NULL, |
3400 | registry->major, registry->minor); | |
3401 | if (ret) { | |
3402 | pthread_mutex_unlock(®istry->lock); | |
3403 | ERR("Failed to generate session metadata (err = %d)", | |
3404 | ret); | |
3405 | goto end; | |
3406 | } | |
3407 | cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, | |
3408 | chan, node.node) { | |
3409 | struct ust_registry_event *event; | |
3410 | struct lttng_ht_iter iter_event; | |
3411 | ||
3412 | ret = ust_metadata_channel_statedump(registry, chan); | |
3413 | if (ret) { | |
3414 | pthread_mutex_unlock(®istry->lock); | |
3415 | ERR("Failed to generate channel metadata " | |
3416 | "(err = %d)", ret); | |
3417 | goto end; | |
3418 | } | |
3419 | cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, | |
3420 | event, node.node) { | |
3421 | ret = ust_metadata_event_statedump(registry, | |
3422 | chan, event); | |
3423 | if (ret) { | |
3424 | pthread_mutex_unlock(®istry->lock); | |
3425 | ERR("Failed to generate event metadata " | |
3426 | "(err = %d)", ret); | |
3427 | goto end; | |
3428 | } | |
3429 | } | |
3430 | } | |
3431 | pthread_mutex_unlock(®istry->lock); | |
3432 | } | |
3433 | ||
3434 | end: | |
3435 | rcu_read_unlock(); | |
3436 | return ret; | |
3437 | } | |
3438 | ||
3439 | /* | |
eded6438 | 3440 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
3441 | * |
3442 | * Ask the consumer to truncate the existing metadata file(s) and | |
3443 | * then regenerate the metadata. Live and per-pid sessions are not | |
3444 | * supported and return an error. | |
3445 | * | |
3446 | * Return 0 on success or else a LTTNG_ERR code. | |
3447 | */ | |
eded6438 | 3448 | int cmd_regenerate_metadata(struct ltt_session *session) |
93ec662e JD |
3449 | { |
3450 | int ret; | |
3451 | ||
3452 | assert(session); | |
3453 | ||
eded6438 | 3454 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
3455 | if (ret) { |
3456 | goto end; | |
3457 | } | |
3458 | ||
3459 | if (session->kernel_session) { | |
eded6438 | 3460 | ret = kernctl_session_regenerate_metadata( |
93ec662e JD |
3461 | session->kernel_session->fd); |
3462 | if (ret < 0) { | |
3463 | ERR("Failed to regenerate the kernel metadata"); | |
3464 | goto end; | |
3465 | } | |
3466 | } | |
3467 | ||
3468 | if (session->ust_session) { | |
eded6438 | 3469 | ret = ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
3470 | if (ret < 0) { |
3471 | ERR("Failed to regenerate the UST metadata"); | |
3472 | goto end; | |
3473 | } | |
3474 | } | |
3475 | DBG("Cmd metadata regenerate for session %s", session->name); | |
3476 | ret = LTTNG_OK; | |
3477 | ||
3478 | end: | |
3479 | return ret; | |
3480 | } | |
3481 | ||
c2561365 JD |
3482 | /* |
3483 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
3484 | * | |
3485 | * Ask the tracer to regenerate a new statedump. | |
3486 | * | |
3487 | * Return 0 on success or else a LTTNG_ERR code. | |
3488 | */ | |
3489 | int cmd_regenerate_statedump(struct ltt_session *session) | |
3490 | { | |
3491 | int ret; | |
3492 | ||
3493 | assert(session); | |
3494 | ||
3495 | if (!session->active) { | |
3496 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
3497 | goto end; | |
3498 | } | |
3499 | ret = 0; | |
3500 | ||
3501 | if (session->kernel_session) { | |
3502 | ret = kernctl_session_regenerate_statedump( | |
3503 | session->kernel_session->fd); | |
3504 | /* | |
3505 | * Currently, the statedump in kernel can only fail if out | |
3506 | * of memory. | |
3507 | */ | |
3508 | if (ret < 0) { | |
3509 | if (ret == -ENOMEM) { | |
3510 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
3511 | } else { | |
3512 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
3513 | } | |
3514 | ERR("Failed to regenerate the kernel statedump"); | |
3515 | goto end; | |
3516 | } | |
3517 | } | |
3518 | ||
3519 | if (session->ust_session) { | |
3520 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
3521 | /* | |
3522 | * Currently, the statedump in UST always returns 0. | |
3523 | */ | |
3524 | if (ret < 0) { | |
3525 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
3526 | ERR("Failed to regenerate the UST statedump"); | |
3527 | goto end; | |
3528 | } | |
3529 | } | |
3530 | DBG("Cmd regenerate statedump for session %s", session->name); | |
3531 | ret = LTTNG_OK; | |
3532 | ||
3533 | end: | |
3534 | return ret; | |
3535 | } | |
3536 | ||
6dc3064a DG |
3537 | /* |
3538 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
3539 | * snapshot output is *not* set with a remote destination. | |
3540 | * | |
a934f4af | 3541 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
3542 | */ |
3543 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
3544 | struct snapshot_output *snap_output, struct ltt_session *session) | |
3545 | { | |
a934f4af | 3546 | int ret = LTTNG_OK; |
6dc3064a DG |
3547 | struct lttng_ht_iter iter; |
3548 | struct consumer_socket *socket; | |
3549 | ||
3550 | assert(consumer); | |
3551 | assert(snap_output); | |
3552 | assert(session); | |
3553 | ||
3554 | DBG2("Set relayd object from snapshot output"); | |
3555 | ||
3556 | /* Ignore if snapshot consumer output is not network. */ | |
3557 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
3558 | goto error; | |
3559 | } | |
3560 | ||
3561 | /* | |
3562 | * For each consumer socket, create and send the relayd object of the | |
3563 | * snapshot output. | |
3564 | */ | |
3565 | rcu_read_lock(); | |
5eecee74 DG |
3566 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
3567 | socket, node.node) { | |
6dc3064a | 3568 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
3569 | snap_output->consumer, socket, |
3570 | session->name, session->hostname, | |
3571 | session->live_timer); | |
a934f4af | 3572 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3573 | rcu_read_unlock(); |
3574 | goto error; | |
3575 | } | |
3576 | } | |
3577 | rcu_read_unlock(); | |
3578 | ||
3579 | error: | |
3580 | return ret; | |
3581 | } | |
3582 | ||
3583 | /* | |
3584 | * Record a kernel snapshot. | |
3585 | * | |
fac41e72 | 3586 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
3587 | */ |
3588 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded | 3589 | struct snapshot_output *output, struct ltt_session *session, |
d07ceecd | 3590 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3591 | { |
3592 | int ret; | |
3593 | ||
3594 | assert(ksess); | |
3595 | assert(output); | |
3596 | assert(session); | |
3597 | ||
10a50311 | 3598 | |
af706bb7 DG |
3599 | /* |
3600 | * Copy kernel session sockets so we can communicate with the right | |
3601 | * consumer for the snapshot record command. | |
3602 | */ | |
3603 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
3604 | if (ret < 0) { | |
a934f4af | 3605 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3606 | goto error; |
6dc3064a DG |
3607 | } |
3608 | ||
3609 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 3610 | if (ret != LTTNG_OK) { |
af706bb7 | 3611 | goto error_snapshot; |
6dc3064a DG |
3612 | } |
3613 | ||
d07ceecd | 3614 | ret = kernel_snapshot_record(ksess, output, wait, nb_packets_per_stream); |
2a06df8d | 3615 | if (ret != LTTNG_OK) { |
af706bb7 | 3616 | goto error_snapshot; |
6dc3064a DG |
3617 | } |
3618 | ||
a934f4af | 3619 | ret = LTTNG_OK; |
1371fc12 | 3620 | goto end; |
a934f4af | 3621 | |
af706bb7 DG |
3622 | error_snapshot: |
3623 | /* Clean up copied sockets so this output can use some other later on. */ | |
3624 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a | 3625 | error: |
1371fc12 | 3626 | end: |
6dc3064a DG |
3627 | return ret; |
3628 | } | |
3629 | ||
3630 | /* | |
3631 | * Record a UST snapshot. | |
3632 | * | |
a934f4af | 3633 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
3634 | */ |
3635 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 3636 | struct snapshot_output *output, struct ltt_session *session, |
d07ceecd | 3637 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3638 | { |
3639 | int ret; | |
3640 | ||
3641 | assert(usess); | |
3642 | assert(output); | |
3643 | assert(session); | |
3644 | ||
af706bb7 | 3645 | /* |
d3f14b8a | 3646 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
3647 | * consumer for the snapshot record command. |
3648 | */ | |
3649 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
3650 | if (ret < 0) { | |
a934f4af | 3651 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3652 | goto error; |
6dc3064a DG |
3653 | } |
3654 | ||
3655 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 3656 | if (ret != LTTNG_OK) { |
af706bb7 | 3657 | goto error_snapshot; |
6dc3064a DG |
3658 | } |
3659 | ||
d07ceecd | 3660 | ret = ust_app_snapshot_record(usess, output, wait, nb_packets_per_stream); |
6dc3064a | 3661 | if (ret < 0) { |
7badf927 DG |
3662 | switch (-ret) { |
3663 | case EINVAL: | |
a934f4af | 3664 | ret = LTTNG_ERR_INVALID; |
7badf927 | 3665 | break; |
7badf927 DG |
3666 | default: |
3667 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
3668 | break; | |
5c786ded | 3669 | } |
af706bb7 | 3670 | goto error_snapshot; |
6dc3064a DG |
3671 | } |
3672 | ||
a934f4af DG |
3673 | ret = LTTNG_OK; |
3674 | ||
af706bb7 DG |
3675 | error_snapshot: |
3676 | /* Clean up copied sockets so this output can use some other later on. */ | |
3677 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
3678 | error: |
3679 | return ret; | |
3680 | } | |
3681 | ||
d07ceecd MD |
3682 | static |
3683 | uint64_t get_session_size_one_more_packet_per_stream(struct ltt_session *session, | |
3684 | uint64_t cur_nr_packets) | |
68808f4e | 3685 | { |
d07ceecd | 3686 | uint64_t tot_size = 0; |
68808f4e DG |
3687 | |
3688 | if (session->kernel_session) { | |
3689 | struct ltt_kernel_channel *chan; | |
3690 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3691 | ||
68808f4e | 3692 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
3693 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
3694 | /* | |
3695 | * Don't take channel into account if we | |
3696 | * already grab all its packets. | |
3697 | */ | |
3698 | continue; | |
68808f4e | 3699 | } |
d07ceecd MD |
3700 | tot_size += chan->channel->attr.subbuf_size |
3701 | * chan->stream_count; | |
68808f4e DG |
3702 | } |
3703 | } | |
3704 | ||
3705 | if (session->ust_session) { | |
68808f4e DG |
3706 | struct ltt_ust_session *usess = session->ust_session; |
3707 | ||
d07ceecd MD |
3708 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
3709 | cur_nr_packets); | |
68808f4e DG |
3710 | } |
3711 | ||
d07ceecd | 3712 | return tot_size; |
68808f4e DG |
3713 | } |
3714 | ||
5c786ded | 3715 | /* |
d07ceecd MD |
3716 | * Calculate the number of packets we can grab from each stream that |
3717 | * fits within the overall snapshot max size. | |
3718 | * | |
3719 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
3720 | * the number of packets per stream. | |
3721 | * | |
3722 | * TODO: this approach is not perfect: we consider the worse case | |
3723 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
3724 | * better if we do this calculation while we actually grab the packet | |
3725 | * content: we would know how much padding we don't actually store into | |
3726 | * the file. | |
3727 | * | |
3728 | * This algorithm is currently bounded by the number of packets per | |
3729 | * stream. | |
3730 | * | |
3731 | * Since we call this algorithm before actually grabbing the data, it's | |
3732 | * an approximation: for instance, applications could appear/disappear | |
3733 | * in between this call and actually grabbing data. | |
5c786ded | 3734 | */ |
d07ceecd MD |
3735 | static |
3736 | int64_t get_session_nb_packets_per_stream(struct ltt_session *session, uint64_t max_size) | |
5c786ded | 3737 | { |
d07ceecd MD |
3738 | int64_t size_left; |
3739 | uint64_t cur_nb_packets = 0; | |
5c786ded | 3740 | |
d07ceecd MD |
3741 | if (!max_size) { |
3742 | return 0; /* Infinite */ | |
5c786ded JD |
3743 | } |
3744 | ||
d07ceecd MD |
3745 | size_left = max_size; |
3746 | for (;;) { | |
3747 | uint64_t one_more_packet_tot_size; | |
5c786ded | 3748 | |
d07ceecd MD |
3749 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream(session, |
3750 | cur_nb_packets); | |
3751 | if (!one_more_packet_tot_size) { | |
3752 | /* We are already grabbing all packets. */ | |
3753 | break; | |
3754 | } | |
3755 | size_left -= one_more_packet_tot_size; | |
3756 | if (size_left < 0) { | |
3757 | break; | |
3758 | } | |
3759 | cur_nb_packets++; | |
5c786ded | 3760 | } |
d07ceecd MD |
3761 | if (!cur_nb_packets) { |
3762 | /* Not enough room to grab one packet of each stream, error. */ | |
3763 | return -1; | |
3764 | } | |
3765 | return cur_nb_packets; | |
5c786ded JD |
3766 | } |
3767 | ||
6dc3064a DG |
3768 | /* |
3769 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3770 | * | |
3771 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3772 | * complete before returning. | |
3773 | * | |
3774 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3775 | */ | |
3776 | int cmd_snapshot_record(struct ltt_session *session, | |
3777 | struct lttng_snapshot_output *output, int wait) | |
3778 | { | |
3779 | int ret = LTTNG_OK; | |
e1986656 DG |
3780 | unsigned int use_tmp_output = 0; |
3781 | struct snapshot_output tmp_output; | |
00e1dfc4 | 3782 | unsigned int snapshot_success = 0; |
10ba83fe | 3783 | char datetime[16]; |
6dc3064a DG |
3784 | |
3785 | assert(session); | |
ba45d9f0 | 3786 | assert(output); |
6dc3064a DG |
3787 | |
3788 | DBG("Cmd snapshot record for session %s", session->name); | |
3789 | ||
10ba83fe JR |
3790 | /* Get the datetime for the snapshot output directory. */ |
3791 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
3792 | sizeof(datetime)); | |
3793 | if (!ret) { | |
3794 | ret = LTTNG_ERR_INVALID; | |
3795 | goto error; | |
3796 | } | |
3797 | ||
6dc3064a | 3798 | /* |
d3f14b8a MD |
3799 | * Permission denied to create an output if the session is not |
3800 | * set in no output mode. | |
6dc3064a DG |
3801 | */ |
3802 | if (session->output_traces) { | |
903ef685 | 3803 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3804 | goto error; |
3805 | } | |
3806 | ||
3807 | /* The session needs to be started at least once. */ | |
8382cf6f | 3808 | if (!session->has_been_started) { |
6dc3064a DG |
3809 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3810 | goto error; | |
3811 | } | |
3812 | ||
3813 | /* Use temporary output for the session. */ | |
ba45d9f0 | 3814 | if (*output->ctrl_url != '\0') { |
6dc3064a DG |
3815 | ret = snapshot_output_init(output->max_size, output->name, |
3816 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3817 | &tmp_output, NULL); |
6dc3064a DG |
3818 | if (ret < 0) { |
3819 | if (ret == -ENOMEM) { | |
3820 | ret = LTTNG_ERR_NOMEM; | |
3821 | } else { | |
3822 | ret = LTTNG_ERR_INVALID; | |
3823 | } | |
3824 | goto error; | |
3825 | } | |
1bfe7328 DG |
3826 | /* Use the global session count for the temporary snapshot. */ |
3827 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
10ba83fe JR |
3828 | |
3829 | /* Use the global datetime */ | |
3830 | memcpy(tmp_output.datetime, datetime, sizeof(datetime)); | |
e1986656 | 3831 | use_tmp_output = 1; |
6dc3064a DG |
3832 | } |
3833 | ||
804c90a8 JR |
3834 | if (use_tmp_output) { |
3835 | int64_t nb_packets_per_stream; | |
6dc3064a | 3836 | |
804c90a8 JR |
3837 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, |
3838 | tmp_output.max_size); | |
3839 | if (nb_packets_per_stream < 0) { | |
3840 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3841 | goto error; | |
3842 | } | |
d07ceecd | 3843 | |
804c90a8 JR |
3844 | if (session->kernel_session) { |
3845 | ret = record_kernel_snapshot(session->kernel_session, | |
3846 | &tmp_output, session, | |
3847 | wait, nb_packets_per_stream); | |
3848 | if (ret != LTTNG_OK) { | |
d07ceecd MD |
3849 | goto error; |
3850 | } | |
804c90a8 JR |
3851 | } |
3852 | ||
3853 | if (session->ust_session) { | |
3854 | ret = record_ust_snapshot(session->ust_session, | |
3855 | &tmp_output, session, | |
d07ceecd | 3856 | wait, nb_packets_per_stream); |
a934f4af | 3857 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3858 | goto error; |
3859 | } | |
804c90a8 | 3860 | } |
e1986656 | 3861 | |
804c90a8 JR |
3862 | snapshot_success = 1; |
3863 | } else { | |
3864 | struct snapshot_output *sout; | |
3865 | struct lttng_ht_iter iter; | |
68808f4e | 3866 | |
804c90a8 JR |
3867 | rcu_read_lock(); |
3868 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3869 | &iter.iter, sout, node.node) { | |
3870 | int64_t nb_packets_per_stream; | |
e1986656 | 3871 | |
804c90a8 JR |
3872 | /* |
3873 | * Make a local copy of the output and assign the possible | |
3874 | * temporary value given by the caller. | |
3875 | */ | |
3876 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3877 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
1bfe7328 | 3878 | |
804c90a8 JR |
3879 | if (output->max_size != (uint64_t) -1ULL) { |
3880 | tmp_output.max_size = output->max_size; | |
6dc3064a | 3881 | } |
d07ceecd MD |
3882 | |
3883 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
3884 | tmp_output.max_size); | |
3885 | if (nb_packets_per_stream < 0) { | |
3886 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
804c90a8 | 3887 | rcu_read_unlock(); |
d07ceecd MD |
3888 | goto error; |
3889 | } | |
6dc3064a | 3890 | |
804c90a8 JR |
3891 | /* Use temporary name. */ |
3892 | if (*output->name != '\0') { | |
cf3e357d MD |
3893 | if (lttng_strncpy(tmp_output.name, output->name, |
3894 | sizeof(tmp_output.name))) { | |
3895 | ret = LTTNG_ERR_INVALID; | |
3896 | rcu_read_unlock(); | |
3897 | goto error; | |
3898 | } | |
804c90a8 | 3899 | } |
e1986656 | 3900 | |
804c90a8 | 3901 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe | 3902 | memcpy(tmp_output.datetime, datetime, sizeof(datetime)); |
e1986656 | 3903 | |
804c90a8 JR |
3904 | if (session->kernel_session) { |
3905 | ret = record_kernel_snapshot(session->kernel_session, | |
3906 | &tmp_output, session, | |
3907 | wait, nb_packets_per_stream); | |
3908 | if (ret != LTTNG_OK) { | |
d07ceecd | 3909 | rcu_read_unlock(); |
68808f4e DG |
3910 | goto error; |
3911 | } | |
804c90a8 | 3912 | } |
68808f4e | 3913 | |
804c90a8 JR |
3914 | if (session->ust_session) { |
3915 | ret = record_ust_snapshot(session->ust_session, | |
3916 | &tmp_output, session, | |
d07ceecd | 3917 | wait, nb_packets_per_stream); |
a934f4af | 3918 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3919 | rcu_read_unlock(); |
3920 | goto error; | |
3921 | } | |
3922 | } | |
804c90a8 | 3923 | snapshot_success = 1; |
6dc3064a | 3924 | } |
804c90a8 | 3925 | rcu_read_unlock(); |
6dc3064a DG |
3926 | } |
3927 | ||
1bfe7328 DG |
3928 | if (snapshot_success) { |
3929 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3930 | } else { |
3931 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3932 | } |
3933 | ||
6dc3064a | 3934 | error: |
6dc3064a DG |
3935 | return ret; |
3936 | } | |
3937 | ||
d7ba1388 MD |
3938 | /* |
3939 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
3940 | */ | |
3941 | int cmd_set_session_shm_path(struct ltt_session *session, | |
3942 | const char *shm_path) | |
3943 | { | |
3944 | /* Safety net */ | |
3945 | assert(session); | |
3946 | ||
3947 | /* | |
3948 | * Can only set shm path before session is started. | |
3949 | */ | |
3950 | if (session->has_been_started) { | |
3951 | return LTTNG_ERR_SESSION_STARTED; | |
3952 | } | |
3953 | ||
3954 | strncpy(session->shm_path, shm_path, | |
3955 | sizeof(session->shm_path)); | |
3956 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
3957 | ||
3958 | return 0; | |
3959 | } | |
3960 | ||
2f77fc4b DG |
3961 | /* |
3962 | * Init command subsystem. | |
3963 | */ | |
3964 | void cmd_init(void) | |
3965 | { | |
3966 | /* | |
d88aee68 DG |
3967 | * Set network sequence index to 1 for streams to match a relayd |
3968 | * socket on the consumer side. | |
2f77fc4b | 3969 | */ |
d88aee68 DG |
3970 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3971 | relayd_net_seq_idx = 1; | |
3972 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3973 | |
3974 | DBG("Command subsystem initialized"); | |
3975 | } |