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> |
2f77fc4b DG |
32 | |
33 | #include "channel.h" | |
34 | #include "consumer.h" | |
35 | #include "event.h" | |
8782cc74 | 36 | #include "health-sessiond.h" |
2f77fc4b DG |
37 | #include "kernel.h" |
38 | #include "kernel-consumer.h" | |
39 | #include "lttng-sessiond.h" | |
40 | #include "utils.h" | |
834978fd | 41 | #include "syscall.h" |
7c1d2758 | 42 | #include "agent.h" |
93ec662e | 43 | #include "buffer-registry.h" |
2f77fc4b DG |
44 | |
45 | #include "cmd.h" | |
46 | ||
47 | /* | |
48 | * Used to keep a unique index for each relayd socket created where this value | |
49 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
50 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
51 | * held. | |
2f77fc4b | 52 | */ |
d88aee68 DG |
53 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
54 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 55 | |
7076b56e JG |
56 | static int validate_event_name(const char *); |
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 | |
2f77fc4b DG |
280 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
281 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
282 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
283 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
284 | channels[i].attr.switch_timer_interval = | |
285 | uchan->attr.switch_timer_interval; | |
286 | channels[i].attr.read_timer_interval = | |
287 | uchan->attr.read_timer_interval; | |
288 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
289 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
290 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
5e4435a4 JG |
291 | |
292 | /* | |
293 | * Map enum lttng_ust_output to enum lttng_event_output. | |
294 | */ | |
2f77fc4b DG |
295 | switch (uchan->attr.output) { |
296 | case LTTNG_UST_MMAP: | |
2f77fc4b DG |
297 | channels[i].attr.output = LTTNG_EVENT_MMAP; |
298 | break; | |
5e4435a4 JG |
299 | default: |
300 | /* | |
301 | * LTTNG_UST_MMAP is the only supported UST | |
302 | * output mode. | |
303 | */ | |
304 | assert(0); | |
305 | break; | |
2f77fc4b | 306 | } |
fb83fe64 JD |
307 | |
308 | ret = get_ust_runtime_stats(session, uchan, | |
309 | &discarded_events, &lost_packets); | |
310 | if (ret < 0) { | |
311 | break; | |
312 | } | |
313 | chan_exts[i].discarded_events = discarded_events; | |
314 | chan_exts[i].lost_packets = lost_packets; | |
2f77fc4b DG |
315 | i++; |
316 | } | |
e7fe706f | 317 | rcu_read_unlock(); |
2f77fc4b DG |
318 | break; |
319 | } | |
320 | default: | |
321 | break; | |
322 | } | |
fb83fe64 JD |
323 | |
324 | end: | |
325 | return; | |
2f77fc4b DG |
326 | } |
327 | ||
b4e3ceb9 | 328 | static void increment_extended_len(const char *filter_expression, |
795d57ce | 329 | struct lttng_event_exclusion *exclusion, size_t *extended_len) |
b4e3ceb9 PP |
330 | { |
331 | *extended_len += sizeof(struct lttcomm_event_extended_header); | |
332 | ||
333 | if (filter_expression) { | |
334 | *extended_len += strlen(filter_expression) + 1; | |
335 | } | |
795d57ce PP |
336 | |
337 | if (exclusion) { | |
338 | *extended_len += exclusion->count * LTTNG_SYMBOL_NAME_LEN; | |
339 | } | |
b4e3ceb9 PP |
340 | } |
341 | ||
342 | static void append_extended_info(const char *filter_expression, | |
795d57ce | 343 | struct lttng_event_exclusion *exclusion, void **extended_at) |
b4e3ceb9 PP |
344 | { |
345 | struct lttcomm_event_extended_header extended_header; | |
346 | size_t filter_len = 0; | |
795d57ce | 347 | size_t nb_exclusions = 0; |
b4e3ceb9 PP |
348 | |
349 | if (filter_expression) { | |
350 | filter_len = strlen(filter_expression) + 1; | |
351 | } | |
352 | ||
795d57ce PP |
353 | if (exclusion) { |
354 | nb_exclusions = exclusion->count; | |
355 | } | |
356 | ||
357 | /* Set header fields */ | |
b4e3ceb9 | 358 | extended_header.filter_len = filter_len; |
795d57ce PP |
359 | extended_header.nb_exclusions = nb_exclusions; |
360 | ||
361 | /* Copy header */ | |
b4e3ceb9 PP |
362 | memcpy(*extended_at, &extended_header, sizeof(extended_header)); |
363 | *extended_at += sizeof(extended_header); | |
795d57ce PP |
364 | |
365 | /* Copy filter string */ | |
366 | if (filter_expression) { | |
367 | memcpy(*extended_at, filter_expression, filter_len); | |
368 | *extended_at += filter_len; | |
369 | } | |
370 | ||
371 | /* Copy exclusion names */ | |
372 | if (exclusion) { | |
373 | size_t len = nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
374 | ||
375 | memcpy(*extended_at, &exclusion->names, len); | |
376 | *extended_at += len; | |
377 | } | |
b4e3ceb9 PP |
378 | } |
379 | ||
3c6a091f | 380 | /* |
022d91ba | 381 | * Create a list of agent domain events. |
3c6a091f DG |
382 | * |
383 | * Return number of events in list on success or else a negative value. | |
384 | */ | |
022d91ba | 385 | static int list_lttng_agent_events(struct agent *agt, |
b4e3ceb9 | 386 | struct lttng_event **events, size_t *total_size) |
3c6a091f DG |
387 | { |
388 | int i = 0, ret = 0; | |
389 | unsigned int nb_event = 0; | |
022d91ba | 390 | struct agent_event *event; |
3c6a091f DG |
391 | struct lttng_event *tmp_events; |
392 | struct lttng_ht_iter iter; | |
b4e3ceb9 PP |
393 | size_t extended_len = 0; |
394 | void *extended_at; | |
3c6a091f | 395 | |
022d91ba | 396 | assert(agt); |
3c6a091f DG |
397 | assert(events); |
398 | ||
022d91ba | 399 | DBG3("Listing agent events"); |
3c6a091f | 400 | |
e5bbf678 | 401 | rcu_read_lock(); |
022d91ba | 402 | nb_event = lttng_ht_get_count(agt->events); |
e5bbf678 | 403 | rcu_read_unlock(); |
3c6a091f DG |
404 | if (nb_event == 0) { |
405 | ret = nb_event; | |
b4e3ceb9 | 406 | *total_size = 0; |
3c6a091f DG |
407 | goto error; |
408 | } | |
409 | ||
b4e3ceb9 PP |
410 | /* Compute required extended infos size */ |
411 | extended_len = nb_event * sizeof(struct lttcomm_event_extended_header); | |
412 | ||
413 | /* | |
414 | * This is only valid because the commands which add events are | |
415 | * processed in the same thread as the listing. | |
416 | */ | |
417 | rcu_read_lock(); | |
418 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { | |
795d57ce PP |
419 | increment_extended_len(event->filter_expression, NULL, |
420 | &extended_len); | |
b4e3ceb9 PP |
421 | } |
422 | rcu_read_unlock(); | |
423 | ||
424 | *total_size = nb_event * sizeof(*tmp_events) + extended_len; | |
425 | tmp_events = zmalloc(*total_size); | |
3c6a091f | 426 | if (!tmp_events) { |
022d91ba | 427 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
428 | ret = -LTTNG_ERR_FATAL; |
429 | goto error; | |
430 | } | |
431 | ||
b4e3ceb9 PP |
432 | extended_at = ((uint8_t *) tmp_events) + |
433 | nb_event * sizeof(struct lttng_event); | |
434 | ||
3c6a091f | 435 | rcu_read_lock(); |
022d91ba | 436 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
437 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
438 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
439 | tmp_events[i].enabled = event->enabled; | |
2106efa0 | 440 | tmp_events[i].loglevel = event->loglevel_value; |
ff94328f | 441 | tmp_events[i].loglevel_type = event->loglevel_type; |
3c6a091f | 442 | i++; |
b4e3ceb9 PP |
443 | |
444 | /* Append extended info */ | |
795d57ce PP |
445 | append_extended_info(event->filter_expression, NULL, |
446 | &extended_at); | |
3c6a091f DG |
447 | } |
448 | rcu_read_unlock(); | |
449 | ||
450 | *events = tmp_events; | |
451 | ret = nb_event; | |
452 | ||
453 | error: | |
454 | assert(nb_event == i); | |
455 | return ret; | |
456 | } | |
457 | ||
2f77fc4b DG |
458 | /* |
459 | * Create a list of ust global domain events. | |
460 | */ | |
461 | static int list_lttng_ust_global_events(char *channel_name, | |
b4e3ceb9 PP |
462 | struct ltt_ust_domain_global *ust_global, |
463 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
464 | { |
465 | int i = 0, ret = 0; | |
466 | unsigned int nb_event = 0; | |
467 | struct lttng_ht_iter iter; | |
468 | struct lttng_ht_node_str *node; | |
469 | struct ltt_ust_channel *uchan; | |
470 | struct ltt_ust_event *uevent; | |
471 | struct lttng_event *tmp; | |
b4e3ceb9 PP |
472 | size_t extended_len = 0; |
473 | void *extended_at; | |
2f77fc4b DG |
474 | |
475 | DBG("Listing UST global events for channel %s", channel_name); | |
476 | ||
477 | rcu_read_lock(); | |
478 | ||
479 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
480 | node = lttng_ht_iter_get_node_str(&iter); | |
481 | if (node == NULL) { | |
f73fabfd | 482 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
d31d3e8c | 483 | goto end; |
2f77fc4b DG |
484 | } |
485 | ||
486 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
487 | ||
3c442be3 | 488 | nb_event = lttng_ht_get_count(uchan->events); |
2f77fc4b DG |
489 | if (nb_event == 0) { |
490 | ret = nb_event; | |
b4e3ceb9 | 491 | *total_size = 0; |
d31d3e8c | 492 | goto end; |
2f77fc4b DG |
493 | } |
494 | ||
495 | DBG3("Listing UST global %d events", nb_event); | |
496 | ||
b4e3ceb9 PP |
497 | /* Compute required extended infos size */ |
498 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
499 | if (uevent->internal) { | |
500 | nb_event--; | |
501 | continue; | |
502 | } | |
503 | ||
504 | increment_extended_len(uevent->filter_expression, | |
795d57ce | 505 | uevent->exclusion, &extended_len); |
b4e3ceb9 | 506 | } |
d31d3e8c PP |
507 | if (nb_event == 0) { |
508 | /* All events are internal, skip. */ | |
509 | ret = 0; | |
510 | *total_size = 0; | |
511 | goto end; | |
512 | } | |
b4e3ceb9 PP |
513 | |
514 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
515 | tmp = zmalloc(*total_size); | |
2f77fc4b | 516 | if (tmp == NULL) { |
b12c38df JG |
517 | ret = -LTTNG_ERR_FATAL; |
518 | goto end; | |
2f77fc4b DG |
519 | } |
520 | ||
b4e3ceb9 PP |
521 | extended_at = ((uint8_t *) tmp) + nb_event * sizeof(struct lttng_event); |
522 | ||
2f77fc4b | 523 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
3c442be3 JG |
524 | if (uevent->internal) { |
525 | /* This event should remain hidden from clients */ | |
3c442be3 JG |
526 | continue; |
527 | } | |
2f77fc4b DG |
528 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
529 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
530 | tmp[i].enabled = uevent->enabled; | |
531 | ||
532 | switch (uevent->attr.instrumentation) { | |
533 | case LTTNG_UST_TRACEPOINT: | |
534 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
535 | break; | |
536 | case LTTNG_UST_PROBE: | |
537 | tmp[i].type = LTTNG_EVENT_PROBE; | |
538 | break; | |
539 | case LTTNG_UST_FUNCTION: | |
540 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
541 | break; | |
542 | } | |
543 | ||
544 | tmp[i].loglevel = uevent->attr.loglevel; | |
545 | switch (uevent->attr.loglevel_type) { | |
546 | case LTTNG_UST_LOGLEVEL_ALL: | |
547 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
548 | break; | |
549 | case LTTNG_UST_LOGLEVEL_RANGE: | |
550 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
551 | break; | |
552 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
553 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
554 | break; | |
555 | } | |
556 | if (uevent->filter) { | |
557 | tmp[i].filter = 1; | |
558 | } | |
4634f12e JI |
559 | if (uevent->exclusion) { |
560 | tmp[i].exclusion = 1; | |
561 | } | |
2f77fc4b | 562 | i++; |
b4e3ceb9 PP |
563 | |
564 | /* Append extended info */ | |
795d57ce PP |
565 | append_extended_info(uevent->filter_expression, |
566 | uevent->exclusion, &extended_at); | |
2f77fc4b DG |
567 | } |
568 | ||
569 | ret = nb_event; | |
570 | *events = tmp; | |
d31d3e8c | 571 | end: |
2f77fc4b DG |
572 | rcu_read_unlock(); |
573 | return ret; | |
574 | } | |
575 | ||
576 | /* | |
577 | * Fill lttng_event array of all kernel events in the channel. | |
578 | */ | |
579 | static int list_lttng_kernel_events(char *channel_name, | |
b4e3ceb9 PP |
580 | struct ltt_kernel_session *kernel_session, |
581 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
582 | { |
583 | int i = 0, ret; | |
584 | unsigned int nb_event; | |
585 | struct ltt_kernel_event *event; | |
586 | struct ltt_kernel_channel *kchan; | |
b4e3ceb9 PP |
587 | size_t extended_len = 0; |
588 | void *extended_at; | |
2f77fc4b DG |
589 | |
590 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
591 | if (kchan == NULL) { | |
f73fabfd | 592 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
593 | goto error; |
594 | } | |
595 | ||
596 | nb_event = kchan->event_count; | |
597 | ||
598 | DBG("Listing events for channel %s", kchan->channel->name); | |
599 | ||
600 | if (nb_event == 0) { | |
b4e3ceb9 | 601 | *total_size = 0; |
834978fd | 602 | *events = NULL; |
db906c12 | 603 | goto end; |
2f77fc4b DG |
604 | } |
605 | ||
b4e3ceb9 PP |
606 | /* Compute required extended infos size */ |
607 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { | |
795d57ce PP |
608 | increment_extended_len(event->filter_expression, NULL, |
609 | &extended_len); | |
b4e3ceb9 PP |
610 | } |
611 | ||
612 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
613 | *events = zmalloc(*total_size); | |
2f77fc4b | 614 | if (*events == NULL) { |
f73fabfd | 615 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
616 | goto error; |
617 | } | |
618 | ||
ab4aa612 | 619 | extended_at = ((void *) *events) + |
b4e3ceb9 PP |
620 | nb_event * sizeof(struct lttng_event); |
621 | ||
2f77fc4b DG |
622 | /* Kernel channels */ |
623 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
624 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
625 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
626 | (*events)[i].enabled = event->enabled; | |
00f992f2 JG |
627 | (*events)[i].filter = |
628 | (unsigned char) !!event->filter_expression; | |
2f77fc4b DG |
629 | |
630 | switch (event->event->instrumentation) { | |
631 | case LTTNG_KERNEL_TRACEPOINT: | |
632 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
633 | break; | |
2f77fc4b | 634 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
635 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
636 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
637 | sizeof(struct lttng_kernel_kprobe)); | |
638 | break; | |
639 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
640 | (*events)[i].type = LTTNG_EVENT_PROBE; |
641 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
642 | sizeof(struct lttng_kernel_kprobe)); | |
643 | break; | |
644 | case LTTNG_KERNEL_FUNCTION: | |
645 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
646 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
647 | sizeof(struct lttng_kernel_function)); | |
648 | break; | |
649 | case LTTNG_KERNEL_NOOP: | |
650 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
651 | break; | |
652 | case LTTNG_KERNEL_SYSCALL: | |
653 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
654 | break; | |
655 | case LTTNG_KERNEL_ALL: | |
656 | assert(0); | |
657 | break; | |
658 | } | |
659 | i++; | |
b4e3ceb9 PP |
660 | |
661 | /* Append extended info */ | |
795d57ce PP |
662 | append_extended_info(event->filter_expression, NULL, |
663 | &extended_at); | |
2f77fc4b DG |
664 | } |
665 | ||
db906c12 | 666 | end: |
2f77fc4b DG |
667 | return nb_event; |
668 | ||
669 | error: | |
f73fabfd DG |
670 | /* Negate the error code to differentiate the size from an error */ |
671 | return -ret; | |
2f77fc4b DG |
672 | } |
673 | ||
674 | /* | |
675 | * Add URI so the consumer output object. Set the correct path depending on the | |
676 | * domain adding the default trace directory. | |
677 | */ | |
678 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
56a37563 JG |
679 | struct lttng_uri *uri, enum lttng_domain_type domain, |
680 | const char *session_name) | |
2f77fc4b | 681 | { |
f73fabfd | 682 | int ret = LTTNG_OK; |
2f77fc4b DG |
683 | const char *default_trace_dir; |
684 | ||
685 | assert(uri); | |
686 | ||
687 | if (consumer == NULL) { | |
688 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 689 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
690 | goto error; |
691 | } | |
692 | ||
693 | switch (domain) { | |
694 | case LTTNG_DOMAIN_KERNEL: | |
695 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
696 | break; | |
697 | case LTTNG_DOMAIN_UST: | |
698 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
699 | break; | |
700 | default: | |
701 | /* | |
702 | * This case is possible is we try to add the URI to the global tracing | |
703 | * session consumer object which in this case there is no subdir. | |
704 | */ | |
705 | default_trace_dir = ""; | |
706 | } | |
707 | ||
708 | switch (uri->dtype) { | |
709 | case LTTNG_DST_IPV4: | |
710 | case LTTNG_DST_IPV6: | |
711 | DBG2("Setting network URI to consumer"); | |
712 | ||
df75acac DG |
713 | if (consumer->type == CONSUMER_DST_NET) { |
714 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
715 | consumer->dst.net.control_isset) || |
716 | (uri->stype == LTTNG_STREAM_DATA && | |
717 | consumer->dst.net.data_isset)) { | |
df75acac DG |
718 | ret = LTTNG_ERR_URL_EXIST; |
719 | goto error; | |
720 | } | |
721 | } else { | |
722 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
723 | } |
724 | ||
df75acac DG |
725 | consumer->type = CONSUMER_DST_NET; |
726 | ||
2f77fc4b DG |
727 | /* Set URI into consumer output object */ |
728 | ret = consumer_set_network_uri(consumer, uri); | |
729 | if (ret < 0) { | |
a74934ba | 730 | ret = -ret; |
2f77fc4b DG |
731 | goto error; |
732 | } else if (ret == 1) { | |
733 | /* | |
734 | * URI was the same in the consumer so we do not append the subdir | |
735 | * again so to not duplicate output dir. | |
736 | */ | |
f86c9f4e | 737 | ret = LTTNG_OK; |
2f77fc4b DG |
738 | goto error; |
739 | } | |
740 | ||
741 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
742 | ret = consumer_set_subdir(consumer, session_name); | |
743 | if (ret < 0) { | |
f73fabfd | 744 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
745 | goto error; |
746 | } | |
747 | } | |
748 | ||
749 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
750 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
751 | strncat(consumer->subdir, default_trace_dir, |
752 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
753 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
754 | } | |
755 | ||
756 | break; | |
757 | case LTTNG_DST_PATH: | |
758 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
759 | memset(consumer->dst.trace_path, 0, | |
760 | sizeof(consumer->dst.trace_path)); | |
761 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
762 | sizeof(consumer->dst.trace_path)); | |
763 | /* Append default trace dir */ | |
764 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
765 | sizeof(consumer->dst.trace_path) - |
766 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
767 | /* Flag consumer as local. */ |
768 | consumer->type = CONSUMER_DST_LOCAL; | |
769 | break; | |
770 | } | |
771 | ||
a74934ba DG |
772 | ret = LTTNG_OK; |
773 | ||
2f77fc4b DG |
774 | error: |
775 | return ret; | |
776 | } | |
777 | ||
778 | /* | |
779 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
780 | */ | |
781 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
782 | { | |
783 | int ret = 0; | |
784 | struct lttng_ht_iter iter; | |
785 | struct consumer_socket *socket; | |
786 | ||
787 | assert(session); | |
788 | ||
e7fe706f DG |
789 | rcu_read_lock(); |
790 | ||
2f77fc4b DG |
791 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
792 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
793 | socket, node.node) { | |
2f77fc4b | 794 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 795 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
796 | pthread_mutex_unlock(socket->lock); |
797 | if (ret < 0) { | |
f73fabfd | 798 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
799 | goto error; |
800 | } | |
801 | } | |
802 | } | |
803 | ||
804 | error: | |
e7fe706f | 805 | rcu_read_unlock(); |
2f77fc4b DG |
806 | return ret; |
807 | } | |
808 | ||
809 | /* | |
810 | * Create a socket to the relayd using the URI. | |
811 | * | |
812 | * On success, the relayd_sock pointer is set to the created socket. | |
813 | * Else, it's stays untouched and a lttcomm error code is returned. | |
814 | */ | |
6151a90f | 815 | static int create_connect_relayd(struct lttng_uri *uri, |
b31610f2 JD |
816 | struct lttcomm_relayd_sock **relayd_sock, |
817 | struct consumer_output *consumer) | |
2f77fc4b DG |
818 | { |
819 | int ret; | |
6151a90f | 820 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 821 | |
6151a90f JD |
822 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
823 | RELAYD_VERSION_COMM_MINOR); | |
824 | if (!rsock) { | |
f73fabfd | 825 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
826 | goto error; |
827 | } | |
828 | ||
ffe60014 DG |
829 | /* |
830 | * Connect to relayd so we can proceed with a session creation. This call | |
831 | * can possibly block for an arbitrary amount of time to set the health | |
832 | * state to be in poll execution. | |
833 | */ | |
834 | health_poll_entry(); | |
6151a90f | 835 | ret = relayd_connect(rsock); |
ffe60014 | 836 | health_poll_exit(); |
2f77fc4b DG |
837 | if (ret < 0) { |
838 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 839 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
840 | goto free_sock; |
841 | } | |
842 | ||
843 | /* Create socket for control stream. */ | |
844 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
845 | DBG3("Creating relayd stream socket from URI"); | |
846 | ||
847 | /* Check relayd version */ | |
6151a90f | 848 | ret = relayd_version_check(rsock); |
2f77fc4b | 849 | if (ret < 0) { |
f73fabfd | 850 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
851 | goto close_sock; |
852 | } | |
b31610f2 JD |
853 | consumer->relay_major_version = rsock->major; |
854 | consumer->relay_minor_version = rsock->minor; | |
2f77fc4b DG |
855 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
856 | DBG3("Creating relayd data socket from URI"); | |
857 | } else { | |
858 | /* Command is not valid */ | |
859 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 860 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
861 | goto close_sock; |
862 | } | |
863 | ||
6151a90f | 864 | *relayd_sock = rsock; |
2f77fc4b | 865 | |
f73fabfd | 866 | return LTTNG_OK; |
2f77fc4b DG |
867 | |
868 | close_sock: | |
6151a90f JD |
869 | /* The returned value is not useful since we are on an error path. */ |
870 | (void) relayd_close(rsock); | |
2f77fc4b | 871 | free_sock: |
6151a90f | 872 | free(rsock); |
2f77fc4b DG |
873 | error: |
874 | return ret; | |
875 | } | |
876 | ||
877 | /* | |
878 | * Connect to the relayd using URI and send the socket to the right consumer. | |
879 | */ | |
56a37563 JG |
880 | static int send_consumer_relayd_socket(enum lttng_domain_type domain, |
881 | unsigned int session_id, struct lttng_uri *relayd_uri, | |
882 | struct consumer_output *consumer, | |
d3e2ba59 JD |
883 | struct consumer_socket *consumer_sock, |
884 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
885 | { |
886 | int ret; | |
6151a90f | 887 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 888 | |
ffe60014 | 889 | /* Connect to relayd and make version check if uri is the control. */ |
b31610f2 | 890 | ret = create_connect_relayd(relayd_uri, &rsock, consumer); |
ffe60014 | 891 | if (ret != LTTNG_OK) { |
6151a90f | 892 | goto error; |
ffe60014 | 893 | } |
6151a90f | 894 | assert(rsock); |
ffe60014 | 895 | |
2f77fc4b | 896 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
897 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
898 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
899 | /* |
900 | * Increment net_seq_idx because we are about to transfer the | |
901 | * new relayd socket to the consumer. | |
d88aee68 | 902 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 903 | */ |
d88aee68 DG |
904 | consumer->net_seq_index = ++relayd_net_seq_idx; |
905 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
906 | } |
907 | ||
2f77fc4b | 908 | /* Send relayd socket to consumer. */ |
6151a90f | 909 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
910 | relayd_uri->stype, session_id, |
911 | session_name, hostname, session_live_timer); | |
2f77fc4b | 912 | if (ret < 0) { |
f73fabfd | 913 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
914 | goto close_sock; |
915 | } | |
916 | ||
c890b720 DG |
917 | /* Flag that the corresponding socket was sent. */ |
918 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 919 | consumer_sock->control_sock_sent = 1; |
c890b720 | 920 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 921 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
922 | } |
923 | ||
f73fabfd | 924 | ret = LTTNG_OK; |
2f77fc4b DG |
925 | |
926 | /* | |
927 | * Close socket which was dup on the consumer side. The session daemon does | |
928 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
929 | */ | |
930 | ||
931 | close_sock: | |
6151a90f JD |
932 | (void) relayd_close(rsock); |
933 | free(rsock); | |
2f77fc4b | 934 | |
6151a90f | 935 | error: |
ffe60014 DG |
936 | if (ret != LTTNG_OK) { |
937 | /* | |
d9078d0c DG |
938 | * The consumer output for this session should not be used anymore |
939 | * since the relayd connection failed thus making any tracing or/and | |
940 | * streaming not usable. | |
ffe60014 | 941 | */ |
d9078d0c | 942 | consumer->enabled = 0; |
ffe60014 | 943 | } |
2f77fc4b DG |
944 | return ret; |
945 | } | |
946 | ||
947 | /* | |
948 | * Send both relayd sockets to a specific consumer and domain. This is a | |
949 | * helper function to facilitate sending the information to the consumer for a | |
950 | * session. | |
951 | */ | |
56a37563 JG |
952 | static int send_consumer_relayd_sockets(enum lttng_domain_type domain, |
953 | unsigned int session_id, struct consumer_output *consumer, | |
954 | struct consumer_socket *sock, char *session_name, | |
955 | char *hostname, int session_live_timer) | |
2f77fc4b | 956 | { |
dda67f6c | 957 | int ret = LTTNG_OK; |
2f77fc4b | 958 | |
2f77fc4b | 959 | assert(consumer); |
6dc3064a | 960 | assert(sock); |
2f77fc4b | 961 | |
2f77fc4b | 962 | /* Sending control relayd socket. */ |
ffe60014 | 963 | if (!sock->control_sock_sent) { |
6dc3064a | 964 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
965 | &consumer->dst.net.control, consumer, sock, |
966 | session_name, hostname, session_live_timer); | |
c890b720 DG |
967 | if (ret != LTTNG_OK) { |
968 | goto error; | |
969 | } | |
2f77fc4b DG |
970 | } |
971 | ||
972 | /* Sending data relayd socket. */ | |
ffe60014 | 973 | if (!sock->data_sock_sent) { |
6dc3064a | 974 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
975 | &consumer->dst.net.data, consumer, sock, |
976 | session_name, hostname, session_live_timer); | |
c890b720 DG |
977 | if (ret != LTTNG_OK) { |
978 | goto error; | |
979 | } | |
2f77fc4b DG |
980 | } |
981 | ||
2f77fc4b DG |
982 | error: |
983 | return ret; | |
984 | } | |
985 | ||
986 | /* | |
987 | * Setup relayd connections for a tracing session. First creates the socket to | |
988 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
989 | * network. | |
990 | */ | |
ffe60014 | 991 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 992 | { |
f73fabfd | 993 | int ret = LTTNG_OK; |
2f77fc4b DG |
994 | struct ltt_ust_session *usess; |
995 | struct ltt_kernel_session *ksess; | |
996 | struct consumer_socket *socket; | |
997 | struct lttng_ht_iter iter; | |
998 | ||
999 | assert(session); | |
1000 | ||
1001 | usess = session->ust_session; | |
1002 | ksess = session->kernel_session; | |
1003 | ||
785d2d0d | 1004 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1005 | |
e7fe706f DG |
1006 | rcu_read_lock(); |
1007 | ||
2f77fc4b DG |
1008 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
1009 | && usess->consumer->enabled) { | |
1010 | /* For each consumer socket, send relayd sockets */ | |
1011 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
1012 | socket, node.node) { | |
2f77fc4b | 1013 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1014 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
1015 | usess->consumer, socket, |
1016 | session->name, session->hostname, | |
1017 | session->live_timer); | |
2f77fc4b | 1018 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1019 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1020 | goto error; |
1021 | } | |
6dc3064a DG |
1022 | /* Session is now ready for network streaming. */ |
1023 | session->net_handle = 1; | |
2f77fc4b | 1024 | } |
b31610f2 JD |
1025 | session->consumer->relay_major_version = |
1026 | usess->consumer->relay_major_version; | |
1027 | session->consumer->relay_minor_version = | |
1028 | usess->consumer->relay_minor_version; | |
2f77fc4b DG |
1029 | } |
1030 | ||
1031 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
1032 | && ksess->consumer->enabled) { | |
1033 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
1034 | socket, node.node) { | |
2f77fc4b | 1035 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1036 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
1037 | ksess->consumer, socket, |
1038 | session->name, session->hostname, | |
1039 | session->live_timer); | |
2f77fc4b | 1040 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1041 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1042 | goto error; |
1043 | } | |
6dc3064a DG |
1044 | /* Session is now ready for network streaming. */ |
1045 | session->net_handle = 1; | |
2f77fc4b | 1046 | } |
b31610f2 JD |
1047 | session->consumer->relay_major_version = |
1048 | ksess->consumer->relay_major_version; | |
1049 | session->consumer->relay_minor_version = | |
1050 | ksess->consumer->relay_minor_version; | |
2f77fc4b DG |
1051 | } |
1052 | ||
1053 | error: | |
e7fe706f | 1054 | rcu_read_unlock(); |
2f77fc4b DG |
1055 | return ret; |
1056 | } | |
1057 | ||
9b6c7ec5 DG |
1058 | /* |
1059 | * Start a kernel session by opening all necessary streams. | |
1060 | */ | |
1061 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
1062 | { | |
1063 | int ret; | |
1064 | struct ltt_kernel_channel *kchan; | |
1065 | ||
1066 | /* Open kernel metadata */ | |
07b86b52 | 1067 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
1068 | ret = kernel_open_metadata(ksess); |
1069 | if (ret < 0) { | |
1070 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1071 | goto error; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | /* Open kernel metadata stream */ | |
07b86b52 | 1076 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1077 | ret = kernel_open_metadata_stream(ksess); |
1078 | if (ret < 0) { | |
1079 | ERR("Kernel create metadata stream failed"); | |
1080 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1081 | goto error; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | /* For each channel */ | |
1086 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1087 | if (kchan->stream_count == 0) { | |
1088 | ret = kernel_open_channel_stream(kchan); | |
1089 | if (ret < 0) { | |
1090 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1091 | goto error; | |
1092 | } | |
1093 | /* Update the stream global counter */ | |
1094 | ksess->stream_count_global += ret; | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | /* Setup kernel consumer socket and send fds to it */ | |
1099 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1100 | if (ret != 0) { |
9b6c7ec5 DG |
1101 | ret = LTTNG_ERR_KERN_START_FAIL; |
1102 | goto error; | |
1103 | } | |
1104 | ||
1105 | /* This start the kernel tracing */ | |
1106 | ret = kernel_start_session(ksess); | |
1107 | if (ret < 0) { | |
1108 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1109 | goto error; | |
1110 | } | |
1111 | ||
1112 | /* Quiescent wait after starting trace */ | |
784303b0 | 1113 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 1114 | |
14fb1ebe | 1115 | ksess->active = 1; |
9b6c7ec5 DG |
1116 | |
1117 | ret = LTTNG_OK; | |
1118 | ||
1119 | error: | |
1120 | return ret; | |
1121 | } | |
1122 | ||
2f77fc4b DG |
1123 | /* |
1124 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1125 | */ | |
56a37563 JG |
1126 | int cmd_disable_channel(struct ltt_session *session, |
1127 | enum lttng_domain_type domain, char *channel_name) | |
2f77fc4b DG |
1128 | { |
1129 | int ret; | |
1130 | struct ltt_ust_session *usess; | |
1131 | ||
1132 | usess = session->ust_session; | |
1133 | ||
2223c96f DG |
1134 | rcu_read_lock(); |
1135 | ||
2f77fc4b DG |
1136 | switch (domain) { |
1137 | case LTTNG_DOMAIN_KERNEL: | |
1138 | { | |
1139 | ret = channel_kernel_disable(session->kernel_session, | |
1140 | channel_name); | |
f73fabfd | 1141 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1142 | goto error; |
1143 | } | |
1144 | ||
1145 | kernel_wait_quiescent(kernel_tracer_fd); | |
1146 | break; | |
1147 | } | |
1148 | case LTTNG_DOMAIN_UST: | |
1149 | { | |
1150 | struct ltt_ust_channel *uchan; | |
1151 | struct lttng_ht *chan_ht; | |
1152 | ||
1153 | chan_ht = usess->domain_global.channels; | |
1154 | ||
1155 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
1156 | if (uchan == NULL) { | |
f73fabfd | 1157 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1158 | goto error; |
1159 | } | |
1160 | ||
7972aab2 | 1161 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1162 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1163 | goto error; |
1164 | } | |
1165 | break; | |
1166 | } | |
2f77fc4b | 1167 | default: |
f73fabfd | 1168 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1169 | goto error; |
1170 | } | |
1171 | ||
f73fabfd | 1172 | ret = LTTNG_OK; |
2f77fc4b DG |
1173 | |
1174 | error: | |
2223c96f | 1175 | rcu_read_unlock(); |
2f77fc4b DG |
1176 | return ret; |
1177 | } | |
1178 | ||
ccf10263 MD |
1179 | /* |
1180 | * Command LTTNG_TRACK_PID processed by the client thread. | |
a9ad0c8f MD |
1181 | * |
1182 | * Called with session lock held. | |
ccf10263 | 1183 | */ |
56a37563 JG |
1184 | int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain, |
1185 | int pid) | |
ccf10263 MD |
1186 | { |
1187 | int ret; | |
1188 | ||
1189 | rcu_read_lock(); | |
1190 | ||
1191 | switch (domain) { | |
1192 | case LTTNG_DOMAIN_KERNEL: | |
1193 | { | |
1194 | struct ltt_kernel_session *ksess; | |
1195 | ||
1196 | ksess = session->kernel_session; | |
1197 | ||
1198 | ret = kernel_track_pid(ksess, pid); | |
1199 | if (ret != LTTNG_OK) { | |
1200 | goto error; | |
1201 | } | |
1202 | ||
1203 | kernel_wait_quiescent(kernel_tracer_fd); | |
1204 | break; | |
1205 | } | |
ccf10263 | 1206 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
1207 | { |
1208 | struct ltt_ust_session *usess; | |
1209 | ||
1210 | usess = session->ust_session; | |
1211 | ||
1212 | ret = trace_ust_track_pid(usess, pid); | |
1213 | if (ret != LTTNG_OK) { | |
1214 | goto error; | |
1215 | } | |
1216 | break; | |
1217 | } | |
ccf10263 MD |
1218 | default: |
1219 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1220 | goto error; | |
1221 | } | |
1222 | ||
1223 | ret = LTTNG_OK; | |
1224 | ||
1225 | error: | |
1226 | rcu_read_unlock(); | |
1227 | return ret; | |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * Command LTTNG_UNTRACK_PID processed by the client thread. | |
a9ad0c8f MD |
1232 | * |
1233 | * Called with session lock held. | |
ccf10263 | 1234 | */ |
56a37563 JG |
1235 | int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain, |
1236 | int pid) | |
ccf10263 MD |
1237 | { |
1238 | int ret; | |
1239 | ||
1240 | rcu_read_lock(); | |
1241 | ||
1242 | switch (domain) { | |
1243 | case LTTNG_DOMAIN_KERNEL: | |
1244 | { | |
1245 | struct ltt_kernel_session *ksess; | |
1246 | ||
1247 | ksess = session->kernel_session; | |
1248 | ||
1249 | ret = kernel_untrack_pid(ksess, pid); | |
1250 | if (ret != LTTNG_OK) { | |
1251 | goto error; | |
1252 | } | |
1253 | ||
1254 | kernel_wait_quiescent(kernel_tracer_fd); | |
1255 | break; | |
1256 | } | |
ccf10263 | 1257 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
1258 | { |
1259 | struct ltt_ust_session *usess; | |
1260 | ||
1261 | usess = session->ust_session; | |
1262 | ||
1263 | ret = trace_ust_untrack_pid(usess, pid); | |
1264 | if (ret != LTTNG_OK) { | |
1265 | goto error; | |
1266 | } | |
1267 | break; | |
1268 | } | |
ccf10263 MD |
1269 | default: |
1270 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1271 | goto error; | |
1272 | } | |
1273 | ||
1274 | ret = LTTNG_OK; | |
1275 | ||
1276 | error: | |
1277 | rcu_read_unlock(); | |
1278 | return ret; | |
1279 | } | |
1280 | ||
2f77fc4b DG |
1281 | /* |
1282 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1283 | * | |
1284 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1285 | */ | |
1286 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 1287 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
1288 | { |
1289 | int ret; | |
1290 | struct ltt_ust_session *usess = session->ust_session; | |
1291 | struct lttng_ht *chan_ht; | |
1f345e94 | 1292 | size_t len; |
2f77fc4b DG |
1293 | |
1294 | assert(session); | |
1295 | assert(attr); | |
7972aab2 | 1296 | assert(domain); |
2f77fc4b | 1297 | |
f5436bfc | 1298 | len = lttng_strnlen(attr->name, sizeof(attr->name)); |
1f345e94 PP |
1299 | |
1300 | /* Validate channel name */ | |
1301 | if (attr->name[0] == '.' || | |
1302 | memchr(attr->name, '/', len) != NULL) { | |
1303 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1304 | goto end; | |
1305 | } | |
1306 | ||
2f77fc4b DG |
1307 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
1308 | ||
03b4fdcf DG |
1309 | rcu_read_lock(); |
1310 | ||
ecc48a90 JD |
1311 | /* |
1312 | * Don't try to enable a channel if the session has been started at | |
1313 | * some point in time before. The tracer does not allow it. | |
1314 | */ | |
8382cf6f | 1315 | if (session->has_been_started) { |
ecc48a90 JD |
1316 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1317 | goto error; | |
1318 | } | |
1319 | ||
1320 | /* | |
1321 | * If the session is a live session, remove the switch timer, the | |
1322 | * live timer does the same thing but sends also synchronisation | |
1323 | * beacons for inactive streams. | |
1324 | */ | |
1325 | if (session->live_timer > 0) { | |
1326 | attr->attr.live_timer_interval = session->live_timer; | |
1327 | attr->attr.switch_timer_interval = 0; | |
1328 | } | |
1329 | ||
33fbd469 DG |
1330 | /* |
1331 | * The ringbuffer (both in user space and kernel) behave badly in overwrite | |
1332 | * mode and with less than 2 subbuf so block it right away and send back an | |
1333 | * invalid attribute error. | |
1334 | */ | |
1335 | if (attr->attr.overwrite && attr->attr.num_subbuf < 2) { | |
1336 | ret = LTTNG_ERR_INVALID; | |
1337 | goto error; | |
1338 | } | |
1339 | ||
7972aab2 | 1340 | switch (domain->type) { |
2f77fc4b DG |
1341 | case LTTNG_DOMAIN_KERNEL: |
1342 | { | |
1343 | struct ltt_kernel_channel *kchan; | |
1344 | ||
2f77fc4b DG |
1345 | kchan = trace_kernel_get_channel_by_name(attr->name, |
1346 | session->kernel_session); | |
1347 | if (kchan == NULL) { | |
1348 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
1349 | if (attr->name[0] != '\0') { |
1350 | session->kernel_session->has_non_default_channel = 1; | |
1351 | } | |
2f77fc4b DG |
1352 | } else { |
1353 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1354 | } | |
1355 | ||
f73fabfd | 1356 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1357 | goto error; |
1358 | } | |
1359 | ||
784303b0 | 1360 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
1361 | break; |
1362 | } | |
1363 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1364 | case LTTNG_DOMAIN_JUL: |
1365 | case LTTNG_DOMAIN_LOG4J: | |
1366 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1367 | { |
1368 | struct ltt_ust_channel *uchan; | |
1369 | ||
9232818f JG |
1370 | /* |
1371 | * FIXME | |
1372 | * | |
1373 | * Current agent implementation limitations force us to allow | |
1374 | * only one channel at once in "agent" subdomains. Each | |
1375 | * subdomain has a default channel name which must be strictly | |
1376 | * adhered to. | |
1377 | */ | |
1378 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
1379 | if (strncmp(attr->name, DEFAULT_JUL_CHANNEL_NAME, | |
1380 | LTTNG_SYMBOL_NAME_LEN)) { | |
1381 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1382 | goto error; | |
1383 | } | |
1384 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
1385 | if (strncmp(attr->name, DEFAULT_LOG4J_CHANNEL_NAME, | |
1386 | LTTNG_SYMBOL_NAME_LEN)) { | |
1387 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1388 | goto error; | |
1389 | } | |
1390 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
1391 | if (strncmp(attr->name, DEFAULT_PYTHON_CHANNEL_NAME, | |
1392 | LTTNG_SYMBOL_NAME_LEN)) { | |
1393 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1394 | goto error; | |
1395 | } | |
1396 | } | |
1397 | ||
2f77fc4b DG |
1398 | chan_ht = usess->domain_global.channels; |
1399 | ||
1400 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
1401 | if (uchan == NULL) { | |
7972aab2 | 1402 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
1403 | if (attr->name[0] != '\0') { |
1404 | usess->has_non_default_channel = 1; | |
1405 | } | |
2f77fc4b | 1406 | } else { |
7972aab2 | 1407 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1408 | } |
1409 | break; | |
1410 | } | |
2f77fc4b | 1411 | default: |
f73fabfd | 1412 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1413 | goto error; |
1414 | } | |
1415 | ||
1416 | error: | |
2223c96f | 1417 | rcu_read_unlock(); |
1f345e94 | 1418 | end: |
2f77fc4b DG |
1419 | return ret; |
1420 | } | |
1421 | ||
2f77fc4b DG |
1422 | /* |
1423 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1424 | */ | |
56a37563 JG |
1425 | int cmd_disable_event(struct ltt_session *session, |
1426 | enum lttng_domain_type domain, char *channel_name, | |
6e911cad | 1427 | struct lttng_event *event) |
2f77fc4b DG |
1428 | { |
1429 | int ret; | |
6e911cad MD |
1430 | char *event_name; |
1431 | ||
18a720cd MD |
1432 | DBG("Disable event command for event \'%s\'", event->name); |
1433 | ||
6e911cad | 1434 | event_name = event->name; |
7076b56e JG |
1435 | if (validate_event_name(event_name)) { |
1436 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1437 | goto error; | |
1438 | } | |
6e911cad | 1439 | |
9b7431cf JG |
1440 | /* Error out on unhandled search criteria */ |
1441 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad | 1442 | || event->pid || event->filter || event->exclusion) { |
7076b56e JG |
1443 | ret = LTTNG_ERR_UNK; |
1444 | goto error; | |
6e911cad | 1445 | } |
2f77fc4b | 1446 | |
2223c96f DG |
1447 | rcu_read_lock(); |
1448 | ||
2f77fc4b DG |
1449 | switch (domain) { |
1450 | case LTTNG_DOMAIN_KERNEL: | |
1451 | { | |
1452 | struct ltt_kernel_channel *kchan; | |
1453 | struct ltt_kernel_session *ksess; | |
1454 | ||
1455 | ksess = session->kernel_session; | |
1456 | ||
85076754 MD |
1457 | /* |
1458 | * If a non-default channel has been created in the | |
1459 | * session, explicitely require that -c chan_name needs | |
1460 | * to be provided. | |
1461 | */ | |
1462 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1463 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1464 | goto error_unlock; |
85076754 MD |
1465 | } |
1466 | ||
2f77fc4b DG |
1467 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1468 | if (kchan == NULL) { | |
f73fabfd | 1469 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1470 | goto error_unlock; |
2f77fc4b DG |
1471 | } |
1472 | ||
6e911cad MD |
1473 | switch (event->type) { |
1474 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1475 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1476 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1477 | case LTTNG_EVENT_PROBE: |
1478 | case LTTNG_EVENT_FUNCTION: | |
1479 | case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ | |
1480 | if (event_name[0] == '\0') { | |
1481 | ret = event_kernel_disable_event(kchan, | |
1482 | NULL, event->type); | |
29c62722 | 1483 | } else { |
d0ae4ea8 | 1484 | ret = event_kernel_disable_event(kchan, |
9550ee81 | 1485 | event_name, event->type); |
29c62722 | 1486 | } |
6e911cad | 1487 | if (ret != LTTNG_OK) { |
7076b56e | 1488 | goto error_unlock; |
6e911cad MD |
1489 | } |
1490 | break; | |
6e911cad MD |
1491 | default: |
1492 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1493 | goto error_unlock; |
2f77fc4b DG |
1494 | } |
1495 | ||
1496 | kernel_wait_quiescent(kernel_tracer_fd); | |
1497 | break; | |
1498 | } | |
1499 | case LTTNG_DOMAIN_UST: | |
1500 | { | |
1501 | struct ltt_ust_channel *uchan; | |
1502 | struct ltt_ust_session *usess; | |
1503 | ||
1504 | usess = session->ust_session; | |
1505 | ||
7076b56e JG |
1506 | if (validate_ust_event_name(event_name)) { |
1507 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1508 | goto error_unlock; | |
1509 | } | |
1510 | ||
85076754 MD |
1511 | /* |
1512 | * If a non-default channel has been created in the | |
9550ee81 | 1513 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1514 | * to be provided. |
1515 | */ | |
1516 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1517 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1518 | goto error_unlock; |
85076754 MD |
1519 | } |
1520 | ||
2f77fc4b DG |
1521 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1522 | channel_name); | |
1523 | if (uchan == NULL) { | |
f73fabfd | 1524 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1525 | goto error_unlock; |
2f77fc4b DG |
1526 | } |
1527 | ||
6e911cad MD |
1528 | switch (event->type) { |
1529 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1530 | /* |
1531 | * An empty event name means that everything | |
1532 | * should be disabled. | |
1533 | */ | |
1534 | if (event->name[0] == '\0') { | |
1535 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 JR |
1536 | } else { |
1537 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1538 | event_name); | |
1539 | } | |
6e911cad | 1540 | if (ret != LTTNG_OK) { |
7076b56e | 1541 | goto error_unlock; |
6e911cad MD |
1542 | } |
1543 | break; | |
1544 | default: | |
1545 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1546 | goto error_unlock; |
2f77fc4b DG |
1547 | } |
1548 | ||
1549 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1550 | channel_name); | |
1551 | break; | |
1552 | } | |
5cdb6027 | 1553 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1554 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1555 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1556 | { |
fefd409b | 1557 | struct agent *agt; |
f20baf8e DG |
1558 | struct ltt_ust_session *usess = session->ust_session; |
1559 | ||
1560 | assert(usess); | |
1561 | ||
6e911cad MD |
1562 | switch (event->type) { |
1563 | case LTTNG_EVENT_ALL: | |
1564 | break; | |
1565 | default: | |
1566 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1567 | goto error_unlock; |
6e911cad MD |
1568 | } |
1569 | ||
5cdb6027 | 1570 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1571 | if (!agt) { |
1572 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1573 | goto error_unlock; |
fefd409b | 1574 | } |
b3639870 JR |
1575 | /* |
1576 | * An empty event name means that everything | |
1577 | * should be disabled. | |
1578 | */ | |
1579 | if (event->name[0] == '\0') { | |
18a720cd MD |
1580 | ret = event_agent_disable_all(usess, agt); |
1581 | } else { | |
1582 | ret = event_agent_disable(usess, agt, event_name); | |
1583 | } | |
f20baf8e | 1584 | if (ret != LTTNG_OK) { |
7076b56e | 1585 | goto error_unlock; |
f20baf8e DG |
1586 | } |
1587 | ||
1588 | break; | |
1589 | } | |
2f77fc4b | 1590 | default: |
f73fabfd | 1591 | ret = LTTNG_ERR_UND; |
7076b56e | 1592 | goto error_unlock; |
2f77fc4b DG |
1593 | } |
1594 | ||
f73fabfd | 1595 | ret = LTTNG_OK; |
2f77fc4b | 1596 | |
7076b56e | 1597 | error_unlock: |
2223c96f | 1598 | rcu_read_unlock(); |
7076b56e | 1599 | error: |
2f77fc4b DG |
1600 | return ret; |
1601 | } | |
1602 | ||
2f77fc4b DG |
1603 | /* |
1604 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1605 | */ | |
56a37563 | 1606 | int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain, |
601d5acf | 1607 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1608 | { |
d5979e4a | 1609 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
bdf64013 JG |
1610 | char *app_ctx_provider_name = NULL, *app_ctx_name = NULL; |
1611 | ||
1612 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
1613 | app_ctx_provider_name = ctx->u.app_ctx.provider_name; | |
1614 | app_ctx_name = ctx->u.app_ctx.ctx_name; | |
1615 | } | |
2f77fc4b DG |
1616 | |
1617 | switch (domain) { | |
1618 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1619 | assert(session->kernel_session); |
1620 | ||
1621 | if (session->kernel_session->channel_count == 0) { | |
1622 | /* Create default channel */ | |
1623 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1624 | if (ret != LTTNG_OK) { | |
1625 | goto error; | |
1626 | } | |
d5979e4a | 1627 | chan_kern_created = 1; |
979e618e | 1628 | } |
2f77fc4b | 1629 | /* Add kernel context to kernel tracer */ |
601d5acf | 1630 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1631 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1632 | goto error; |
1633 | } | |
1634 | break; | |
bdf64013 JG |
1635 | case LTTNG_DOMAIN_JUL: |
1636 | case LTTNG_DOMAIN_LOG4J: | |
1637 | { | |
1638 | /* | |
1639 | * Validate channel name. | |
1640 | * If no channel name is given and the domain is JUL or LOG4J, | |
1641 | * set it to the appropriate domain-specific channel name. If | |
1642 | * a name is provided but does not match the expexted channel | |
1643 | * name, return an error. | |
1644 | */ | |
1645 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
1646 | strcmp(channel_name, | |
1647 | DEFAULT_JUL_CHANNEL_NAME)) { | |
1648 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1649 | goto error; | |
1650 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
1651 | strcmp(channel_name, | |
1652 | DEFAULT_LOG4J_CHANNEL_NAME)) { | |
1653 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1654 | goto error; | |
1655 | } | |
a93b3916 | 1656 | /* break is _not_ missing here. */ |
bdf64013 | 1657 | } |
2f77fc4b DG |
1658 | case LTTNG_DOMAIN_UST: |
1659 | { | |
1660 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1661 | unsigned int chan_count; |
1662 | ||
2f77fc4b DG |
1663 | assert(usess); |
1664 | ||
85076754 | 1665 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1666 | if (chan_count == 0) { |
1667 | struct lttng_channel *attr; | |
1668 | /* Create default channel */ | |
0a9c6494 | 1669 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1670 | if (attr == NULL) { |
1671 | ret = LTTNG_ERR_FATAL; | |
1672 | goto error; | |
1673 | } | |
1674 | ||
7972aab2 | 1675 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1676 | if (ret != LTTNG_OK) { |
1677 | free(attr); | |
1678 | goto error; | |
1679 | } | |
1680 | free(attr); | |
d5979e4a | 1681 | chan_ust_created = 1; |
979e618e DG |
1682 | } |
1683 | ||
601d5acf | 1684 | ret = context_ust_add(usess, domain, ctx, channel_name); |
bdf64013 JG |
1685 | free(app_ctx_provider_name); |
1686 | free(app_ctx_name); | |
1687 | app_ctx_name = NULL; | |
1688 | app_ctx_provider_name = NULL; | |
f73fabfd | 1689 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1690 | goto error; |
1691 | } | |
1692 | break; | |
1693 | } | |
2f77fc4b | 1694 | default: |
f73fabfd | 1695 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1696 | goto error; |
1697 | } | |
1698 | ||
bdf64013 JG |
1699 | ret = LTTNG_OK; |
1700 | goto end; | |
2f77fc4b DG |
1701 | |
1702 | error: | |
d5979e4a DG |
1703 | if (chan_kern_created) { |
1704 | struct ltt_kernel_channel *kchan = | |
1705 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1706 | session->kernel_session); | |
1707 | /* Created previously, this should NOT fail. */ | |
1708 | assert(kchan); | |
1709 | kernel_destroy_channel(kchan); | |
1710 | } | |
1711 | ||
1712 | if (chan_ust_created) { | |
1713 | struct ltt_ust_channel *uchan = | |
1714 | trace_ust_find_channel_by_name( | |
1715 | session->ust_session->domain_global.channels, | |
1716 | DEFAULT_CHANNEL_NAME); | |
1717 | /* Created previously, this should NOT fail. */ | |
1718 | assert(uchan); | |
1719 | /* Remove from the channel list of the session. */ | |
1720 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1721 | uchan); | |
1722 | trace_ust_destroy_channel(uchan); | |
1723 | } | |
bdf64013 JG |
1724 | end: |
1725 | free(app_ctx_provider_name); | |
1726 | free(app_ctx_name); | |
2f77fc4b DG |
1727 | return ret; |
1728 | } | |
1729 | ||
930a2e99 JG |
1730 | static int validate_event_name(const char *name) |
1731 | { | |
1732 | int ret = 0; | |
1733 | const char *c = name; | |
1734 | const char *event_name_end = c + LTTNG_SYMBOL_NAME_LEN; | |
bf9807db | 1735 | bool null_terminated = false; |
930a2e99 JG |
1736 | |
1737 | /* | |
1738 | * Make sure that unescaped wildcards are only used as the last | |
1739 | * character of the event name. | |
1740 | */ | |
1741 | while (c < event_name_end) { | |
1742 | switch (*c) { | |
1743 | case '\0': | |
bf9807db | 1744 | null_terminated = true; |
930a2e99 JG |
1745 | goto end; |
1746 | case '\\': | |
1747 | c++; | |
1748 | break; | |
1749 | case '*': | |
1750 | if ((c + 1) < event_name_end && *(c + 1)) { | |
1751 | /* Wildcard is not the last character */ | |
1752 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1753 | goto end; | |
1754 | } | |
1755 | default: | |
1756 | break; | |
1757 | } | |
1758 | c++; | |
1759 | } | |
1760 | end: | |
bf9807db JG |
1761 | if (!ret && !null_terminated) { |
1762 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1763 | } | |
930a2e99 JG |
1764 | return ret; |
1765 | } | |
1766 | ||
dac8e046 JG |
1767 | static inline bool name_starts_with(const char *name, const char *prefix) |
1768 | { | |
1769 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
1770 | ||
1771 | return !strncmp(name, prefix, max_cmp_len); | |
1772 | } | |
1773 | ||
1774 | /* Perform userspace-specific event name validation */ | |
1775 | static int validate_ust_event_name(const char *name) | |
1776 | { | |
1777 | int ret = 0; | |
1778 | ||
1779 | if (!name) { | |
1780 | ret = -1; | |
1781 | goto end; | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * Check name against all internal UST event component namespaces used | |
1786 | * by the agents. | |
1787 | */ | |
1788 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
1789 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
1790 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
1791 | ret = -1; | |
1792 | } | |
1793 | ||
1794 | end: | |
1795 | return ret; | |
1796 | } | |
88f06f15 | 1797 | |
2f77fc4b | 1798 | /* |
88f06f15 JG |
1799 | * Internal version of cmd_enable_event() with a supplemental |
1800 | * "internal_event" flag which is used to enable internal events which should | |
1801 | * be hidden from clients. Such events are used in the agent implementation to | |
1802 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 1803 | */ |
88f06f15 JG |
1804 | static int _cmd_enable_event(struct ltt_session *session, |
1805 | struct lttng_domain *domain, | |
025faf73 | 1806 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1807 | char *filter_expression, |
db8f1377 JI |
1808 | struct lttng_filter_bytecode *filter, |
1809 | struct lttng_event_exclusion *exclusion, | |
88f06f15 | 1810 | int wpipe, bool internal_event) |
2f77fc4b | 1811 | { |
e5f5db7f | 1812 | int ret, channel_created = 0; |
2f77fc4b DG |
1813 | struct lttng_channel *attr; |
1814 | ||
1815 | assert(session); | |
1816 | assert(event); | |
1817 | assert(channel_name); | |
1818 | ||
2a385866 JG |
1819 | /* If we have a filter, we must have its filter expression */ |
1820 | assert(!(!!filter_expression ^ !!filter)); | |
1821 | ||
18a720cd MD |
1822 | DBG("Enable event command for event \'%s\'", event->name); |
1823 | ||
f5ac4bd7 MD |
1824 | rcu_read_lock(); |
1825 | ||
930a2e99 JG |
1826 | ret = validate_event_name(event->name); |
1827 | if (ret) { | |
1828 | goto error; | |
1829 | } | |
1830 | ||
7972aab2 | 1831 | switch (domain->type) { |
2f77fc4b DG |
1832 | case LTTNG_DOMAIN_KERNEL: |
1833 | { | |
1834 | struct ltt_kernel_channel *kchan; | |
1835 | ||
85076754 MD |
1836 | /* |
1837 | * If a non-default channel has been created in the | |
1838 | * session, explicitely require that -c chan_name needs | |
1839 | * to be provided. | |
1840 | */ | |
1841 | if (session->kernel_session->has_non_default_channel | |
1842 | && channel_name[0] == '\0') { | |
1843 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1844 | goto error; | |
1845 | } | |
1846 | ||
2f77fc4b DG |
1847 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1848 | session->kernel_session); | |
1849 | if (kchan == NULL) { | |
0a9c6494 DG |
1850 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1851 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1852 | if (attr == NULL) { |
f73fabfd | 1853 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1854 | goto error; |
1855 | } | |
1856 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1857 | ||
1858 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1859 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1860 | free(attr); |
1861 | goto error; | |
1862 | } | |
1863 | free(attr); | |
e5f5db7f DG |
1864 | |
1865 | channel_created = 1; | |
2f77fc4b DG |
1866 | } |
1867 | ||
1868 | /* Get the newly created kernel channel pointer */ | |
1869 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1870 | session->kernel_session); | |
1871 | if (kchan == NULL) { | |
1872 | /* This sould not happen... */ | |
f73fabfd | 1873 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1874 | goto error; |
1875 | } | |
1876 | ||
6e911cad MD |
1877 | switch (event->type) { |
1878 | case LTTNG_EVENT_ALL: | |
29c62722 | 1879 | { |
00a62084 MD |
1880 | char *filter_expression_a = NULL; |
1881 | struct lttng_filter_bytecode *filter_a = NULL; | |
1882 | ||
1883 | /* | |
1884 | * We need to duplicate filter_expression and filter, | |
1885 | * because ownership is passed to first enable | |
1886 | * event. | |
1887 | */ | |
1888 | if (filter_expression) { | |
1889 | filter_expression_a = strdup(filter_expression); | |
1890 | if (!filter_expression_a) { | |
1891 | ret = LTTNG_ERR_FATAL; | |
1892 | goto error; | |
1893 | } | |
1894 | } | |
1895 | if (filter) { | |
1896 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
1897 | if (!filter_a) { | |
1898 | free(filter_expression_a); | |
1899 | ret = LTTNG_ERR_FATAL; | |
1900 | goto error; | |
1901 | } | |
1902 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
1903 | } | |
29c62722 | 1904 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
1905 | ret = event_kernel_enable_event(kchan, event, |
1906 | filter_expression, filter); | |
a969e101 MD |
1907 | /* We have passed ownership */ |
1908 | filter_expression = NULL; | |
1909 | filter = NULL; | |
29c62722 MD |
1910 | if (ret != LTTNG_OK) { |
1911 | if (channel_created) { | |
1912 | /* Let's not leak a useless channel. */ | |
1913 | kernel_destroy_channel(kchan); | |
1914 | } | |
00a62084 MD |
1915 | free(filter_expression_a); |
1916 | free(filter_a); | |
29c62722 MD |
1917 | goto error; |
1918 | } | |
1919 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
1920 | ret = event_kernel_enable_event(kchan, event, |
1921 | filter_expression_a, filter_a); | |
60d21fa2 AB |
1922 | /* We have passed ownership */ |
1923 | filter_expression_a = NULL; | |
1924 | filter_a = NULL; | |
29c62722 MD |
1925 | if (ret != LTTNG_OK) { |
1926 | goto error; | |
1927 | } | |
1928 | break; | |
1929 | } | |
6e6ef3d7 DG |
1930 | case LTTNG_EVENT_PROBE: |
1931 | case LTTNG_EVENT_FUNCTION: | |
1932 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 1933 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
1934 | ret = event_kernel_enable_event(kchan, event, |
1935 | filter_expression, filter); | |
a969e101 MD |
1936 | /* We have passed ownership */ |
1937 | filter_expression = NULL; | |
1938 | filter = NULL; | |
6e911cad MD |
1939 | if (ret != LTTNG_OK) { |
1940 | if (channel_created) { | |
1941 | /* Let's not leak a useless channel. */ | |
1942 | kernel_destroy_channel(kchan); | |
1943 | } | |
1944 | goto error; | |
e5f5db7f | 1945 | } |
6e911cad MD |
1946 | break; |
1947 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
1948 | ret = event_kernel_enable_event(kchan, event, |
1949 | filter_expression, filter); | |
a969e101 MD |
1950 | /* We have passed ownership */ |
1951 | filter_expression = NULL; | |
1952 | filter = NULL; | |
e2b957af MD |
1953 | if (ret != LTTNG_OK) { |
1954 | goto error; | |
1955 | } | |
6e911cad MD |
1956 | break; |
1957 | default: | |
1958 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1959 | goto error; |
1960 | } | |
1961 | ||
1962 | kernel_wait_quiescent(kernel_tracer_fd); | |
1963 | break; | |
1964 | } | |
1965 | case LTTNG_DOMAIN_UST: | |
1966 | { | |
1967 | struct ltt_ust_channel *uchan; | |
1968 | struct ltt_ust_session *usess = session->ust_session; | |
1969 | ||
1970 | assert(usess); | |
1971 | ||
85076754 MD |
1972 | /* |
1973 | * If a non-default channel has been created in the | |
1974 | * session, explicitely require that -c chan_name needs | |
1975 | * to be provided. | |
1976 | */ | |
1977 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1978 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1979 | goto error; | |
1980 | } | |
1981 | ||
2f77fc4b DG |
1982 | /* Get channel from global UST domain */ |
1983 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1984 | channel_name); | |
1985 | if (uchan == NULL) { | |
1986 | /* Create default channel */ | |
0a9c6494 DG |
1987 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1988 | usess->buffer_type); | |
2f77fc4b | 1989 | if (attr == NULL) { |
f73fabfd | 1990 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1991 | goto error; |
1992 | } | |
1993 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1994 | ||
1995 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1996 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1997 | free(attr); |
1998 | goto error; | |
1999 | } | |
2000 | free(attr); | |
2001 | ||
2002 | /* Get the newly created channel reference back */ | |
2003 | uchan = trace_ust_find_channel_by_name( | |
2004 | usess->domain_global.channels, channel_name); | |
2005 | assert(uchan); | |
2006 | } | |
2007 | ||
141feb8c JG |
2008 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2009 | /* | |
2010 | * Don't allow users to add UST events to channels which | |
2011 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2012 | * Python, etc.). | |
2013 | */ | |
2014 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2015 | goto error; | |
2016 | } | |
2017 | ||
dac8e046 JG |
2018 | if (!internal_event) { |
2019 | /* | |
2020 | * Ensure the event name is not reserved for internal | |
2021 | * use. | |
2022 | */ | |
2023 | ret = validate_ust_event_name(event->name); | |
2024 | if (ret) { | |
2025 | WARN("Userspace event name %s failed validation.", | |
2026 | event->name ? | |
2027 | event->name : "NULL"); | |
2028 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
2029 | goto error; | |
2030 | } | |
2031 | } | |
2032 | ||
2f77fc4b | 2033 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 2034 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
88f06f15 JG |
2035 | filter_expression, filter, exclusion, |
2036 | internal_event); | |
49d21f93 MD |
2037 | /* We have passed ownership */ |
2038 | filter_expression = NULL; | |
2039 | filter = NULL; | |
2040 | exclusion = NULL; | |
94382e15 JG |
2041 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2042 | goto already_enabled; | |
2043 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2044 | goto error; |
2045 | } | |
2046 | break; | |
2047 | } | |
5cdb6027 | 2048 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2049 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2050 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2051 | { |
da6c3a50 | 2052 | const char *default_event_name, *default_chan_name; |
fefd409b | 2053 | struct agent *agt; |
f20baf8e DG |
2054 | struct lttng_event uevent; |
2055 | struct lttng_domain tmp_dom; | |
2056 | struct ltt_ust_session *usess = session->ust_session; | |
2057 | ||
2058 | assert(usess); | |
2059 | ||
5cdb6027 | 2060 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2061 | if (!agt) { |
5cdb6027 | 2062 | agt = agent_create(domain->type); |
fefd409b | 2063 | if (!agt) { |
e5b3c48c | 2064 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2065 | goto error; |
2066 | } | |
2067 | agent_add(agt, usess->agents); | |
2068 | } | |
2069 | ||
022d91ba | 2070 | /* Create the default tracepoint. */ |
996de3c7 | 2071 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2072 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2073 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
51755dc8 JG |
2074 | default_event_name = event_get_default_agent_ust_name( |
2075 | domain->type); | |
da6c3a50 | 2076 | if (!default_event_name) { |
e5b3c48c | 2077 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2078 | goto error; |
f43f95a9 | 2079 | } |
da6c3a50 | 2080 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2081 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2082 | ||
2083 | /* | |
2084 | * The domain type is changed because we are about to enable the | |
2085 | * default channel and event for the JUL domain that are hardcoded. | |
2086 | * This happens in the UST domain. | |
2087 | */ | |
2088 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2089 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2090 | ||
0e115563 DG |
2091 | switch (domain->type) { |
2092 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2093 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2094 | break; |
2095 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2096 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2097 | break; |
2098 | case LTTNG_DOMAIN_PYTHON: | |
2099 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2100 | break; | |
2101 | default: | |
e98a44b0 | 2102 | /* The switch/case we are in makes this impossible */ |
0e115563 | 2103 | assert(0); |
da6c3a50 DG |
2104 | } |
2105 | ||
971da06a | 2106 | { |
8404118c | 2107 | char *filter_expression_copy = NULL; |
51755dc8 | 2108 | struct lttng_filter_bytecode *filter_copy = NULL; |
971da06a JG |
2109 | |
2110 | if (filter) { | |
51755dc8 JG |
2111 | const size_t filter_size = sizeof( |
2112 | struct lttng_filter_bytecode) | |
2113 | + filter->len; | |
2114 | ||
2115 | filter_copy = zmalloc(filter_size); | |
971da06a | 2116 | if (!filter_copy) { |
018096a4 | 2117 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2118 | goto error; |
971da06a | 2119 | } |
51755dc8 | 2120 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2121 | |
8404118c JG |
2122 | filter_expression_copy = |
2123 | strdup(filter_expression); | |
2124 | if (!filter_expression) { | |
2125 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2126 | } |
2127 | ||
2128 | if (!filter_expression_copy || !filter_copy) { | |
2129 | free(filter_expression_copy); | |
2130 | free(filter_copy); | |
2131 | goto error; | |
8404118c | 2132 | } |
971da06a JG |
2133 | } |
2134 | ||
88f06f15 | 2135 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a | 2136 | (char *) default_chan_name, |
8404118c JG |
2137 | &uevent, filter_expression_copy, |
2138 | filter_copy, NULL, wpipe); | |
971da06a JG |
2139 | } |
2140 | ||
94382e15 JG |
2141 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2142 | goto already_enabled; | |
2143 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2144 | goto error; |
2145 | } | |
2146 | ||
2147 | /* The wild card * means that everything should be enabled. */ | |
2148 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8404118c JG |
2149 | ret = event_agent_enable_all(usess, agt, event, filter, |
2150 | filter_expression); | |
f20baf8e | 2151 | } else { |
8404118c JG |
2152 | ret = event_agent_enable(usess, agt, event, filter, |
2153 | filter_expression); | |
f20baf8e | 2154 | } |
51755dc8 JG |
2155 | filter = NULL; |
2156 | filter_expression = NULL; | |
f20baf8e DG |
2157 | if (ret != LTTNG_OK) { |
2158 | goto error; | |
2159 | } | |
2160 | ||
2161 | break; | |
2162 | } | |
2f77fc4b | 2163 | default: |
f73fabfd | 2164 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2165 | goto error; |
2166 | } | |
2167 | ||
f73fabfd | 2168 | ret = LTTNG_OK; |
2f77fc4b | 2169 | |
94382e15 | 2170 | already_enabled: |
2f77fc4b | 2171 | error: |
49d21f93 MD |
2172 | free(filter_expression); |
2173 | free(filter); | |
2174 | free(exclusion); | |
2223c96f | 2175 | rcu_read_unlock(); |
2f77fc4b DG |
2176 | return ret; |
2177 | } | |
2178 | ||
88f06f15 JG |
2179 | /* |
2180 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2181 | * We own filter, exclusion, and filter_expression. | |
2182 | */ | |
2183 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, | |
2184 | char *channel_name, struct lttng_event *event, | |
2185 | char *filter_expression, | |
2186 | struct lttng_filter_bytecode *filter, | |
2187 | struct lttng_event_exclusion *exclusion, | |
2188 | int wpipe) | |
2189 | { | |
2190 | return _cmd_enable_event(session, domain, channel_name, event, | |
2191 | filter_expression, filter, exclusion, wpipe, false); | |
2192 | } | |
2193 | ||
2194 | /* | |
2195 | * Enable an event which is internal to LTTng. An internal should | |
2196 | * never be made visible to clients and are immune to checks such as | |
2197 | * reserved names. | |
2198 | */ | |
2199 | static int cmd_enable_event_internal(struct ltt_session *session, | |
2200 | struct lttng_domain *domain, | |
2201 | char *channel_name, struct lttng_event *event, | |
2202 | char *filter_expression, | |
2203 | struct lttng_filter_bytecode *filter, | |
2204 | struct lttng_event_exclusion *exclusion, | |
2205 | int wpipe) | |
2206 | { | |
2207 | return _cmd_enable_event(session, domain, channel_name, event, | |
2208 | filter_expression, filter, exclusion, wpipe, true); | |
2209 | } | |
2210 | ||
2f77fc4b DG |
2211 | /* |
2212 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2213 | */ | |
56a37563 JG |
2214 | ssize_t cmd_list_tracepoints(enum lttng_domain_type domain, |
2215 | struct lttng_event **events) | |
2f77fc4b DG |
2216 | { |
2217 | int ret; | |
2218 | ssize_t nb_events = 0; | |
2219 | ||
2220 | switch (domain) { | |
2221 | case LTTNG_DOMAIN_KERNEL: | |
2222 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2223 | if (nb_events < 0) { | |
f73fabfd | 2224 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2225 | goto error; |
2226 | } | |
2227 | break; | |
2228 | case LTTNG_DOMAIN_UST: | |
2229 | nb_events = ust_app_list_events(events); | |
2230 | if (nb_events < 0) { | |
f73fabfd | 2231 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2232 | goto error; |
2233 | } | |
2234 | break; | |
5cdb6027 | 2235 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2236 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2237 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 2238 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
2239 | if (nb_events < 0) { |
2240 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2241 | goto error; | |
2242 | } | |
2243 | break; | |
2f77fc4b | 2244 | default: |
f73fabfd | 2245 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2246 | goto error; |
2247 | } | |
2248 | ||
2249 | return nb_events; | |
2250 | ||
2251 | error: | |
2252 | /* Return negative value to differentiate return code */ | |
2253 | return -ret; | |
2254 | } | |
2255 | ||
2256 | /* | |
2257 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2258 | */ | |
56a37563 | 2259 | ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
2f77fc4b DG |
2260 | struct lttng_event_field **fields) |
2261 | { | |
2262 | int ret; | |
2263 | ssize_t nb_fields = 0; | |
2264 | ||
2265 | switch (domain) { | |
2266 | case LTTNG_DOMAIN_UST: | |
2267 | nb_fields = ust_app_list_event_fields(fields); | |
2268 | if (nb_fields < 0) { | |
f73fabfd | 2269 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2270 | goto error; |
2271 | } | |
2272 | break; | |
2273 | case LTTNG_DOMAIN_KERNEL: | |
2274 | default: /* fall-through */ | |
f73fabfd | 2275 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2276 | goto error; |
2277 | } | |
2278 | ||
2279 | return nb_fields; | |
2280 | ||
2281 | error: | |
2282 | /* Return negative value to differentiate return code */ | |
2283 | return -ret; | |
2284 | } | |
2285 | ||
834978fd DG |
2286 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
2287 | { | |
2288 | return syscall_table_list(events); | |
2289 | } | |
2290 | ||
a5dfbb9d MD |
2291 | /* |
2292 | * Command LTTNG_LIST_TRACKER_PIDS processed by the client thread. | |
2293 | * | |
2294 | * Called with session lock held. | |
2295 | */ | |
2296 | ssize_t cmd_list_tracker_pids(struct ltt_session *session, | |
56a37563 | 2297 | enum lttng_domain_type domain, int32_t **pids) |
a5dfbb9d MD |
2298 | { |
2299 | int ret; | |
2300 | ssize_t nr_pids = 0; | |
2301 | ||
2302 | switch (domain) { | |
2303 | case LTTNG_DOMAIN_KERNEL: | |
2304 | { | |
2305 | struct ltt_kernel_session *ksess; | |
2306 | ||
2307 | ksess = session->kernel_session; | |
2308 | nr_pids = kernel_list_tracker_pids(ksess, pids); | |
2309 | if (nr_pids < 0) { | |
2310 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
2311 | goto error; | |
2312 | } | |
2313 | break; | |
2314 | } | |
2315 | case LTTNG_DOMAIN_UST: | |
2316 | { | |
2317 | struct ltt_ust_session *usess; | |
2318 | ||
2319 | usess = session->ust_session; | |
2320 | nr_pids = trace_ust_list_tracker_pids(usess, pids); | |
2321 | if (nr_pids < 0) { | |
2322 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2323 | goto error; | |
2324 | } | |
2325 | break; | |
2326 | } | |
2327 | case LTTNG_DOMAIN_LOG4J: | |
2328 | case LTTNG_DOMAIN_JUL: | |
2329 | case LTTNG_DOMAIN_PYTHON: | |
2330 | default: | |
2331 | ret = LTTNG_ERR_UND; | |
2332 | goto error; | |
2333 | } | |
2334 | ||
2335 | return nr_pids; | |
2336 | ||
2337 | error: | |
2338 | /* Return negative value to differentiate return code */ | |
2339 | return -ret; | |
2340 | } | |
2341 | ||
2f77fc4b DG |
2342 | /* |
2343 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2344 | * |
2345 | * Called with session mutex held. | |
2f77fc4b DG |
2346 | */ |
2347 | int cmd_start_trace(struct ltt_session *session) | |
2348 | { | |
2349 | int ret; | |
cde3e505 | 2350 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2351 | struct ltt_kernel_session *ksession; |
2352 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
2353 | |
2354 | assert(session); | |
2355 | ||
2356 | /* Ease our life a bit ;) */ | |
2357 | ksession = session->kernel_session; | |
2358 | usess = session->ust_session; | |
2359 | ||
8382cf6f DG |
2360 | /* Is the session already started? */ |
2361 | if (session->active) { | |
f73fabfd | 2362 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2363 | goto error; |
2364 | } | |
2365 | ||
cde3e505 DG |
2366 | /* |
2367 | * Starting a session without channel is useless since after that it's not | |
2368 | * possible to enable channel thus inform the client. | |
2369 | */ | |
2370 | if (usess && usess->domain_global.channels) { | |
2371 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2372 | } | |
2373 | if (ksession) { | |
2374 | nb_chan += ksession->channel_count; | |
2375 | } | |
2376 | if (!nb_chan) { | |
2377 | ret = LTTNG_ERR_NO_CHANNEL; | |
2378 | goto error; | |
2379 | } | |
2380 | ||
2f77fc4b DG |
2381 | /* Kernel tracing */ |
2382 | if (ksession != NULL) { | |
9b6c7ec5 DG |
2383 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
2384 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2385 | goto error; |
2386 | } | |
2f77fc4b DG |
2387 | } |
2388 | ||
2389 | /* Flag session that trace should start automatically */ | |
2390 | if (usess) { | |
14fb1ebe DG |
2391 | /* |
2392 | * Even though the start trace might fail, flag this session active so | |
2393 | * other application coming in are started by default. | |
2394 | */ | |
2395 | usess->active = 1; | |
2f77fc4b DG |
2396 | |
2397 | ret = ust_app_start_trace_all(usess); | |
2398 | if (ret < 0) { | |
f73fabfd | 2399 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2400 | goto error; |
2401 | } | |
2402 | } | |
2403 | ||
8382cf6f DG |
2404 | /* Flag this after a successful start. */ |
2405 | session->has_been_started = 1; | |
2406 | session->active = 1; | |
9b6c7ec5 | 2407 | |
f73fabfd | 2408 | ret = LTTNG_OK; |
2f77fc4b DG |
2409 | |
2410 | error: | |
2411 | return ret; | |
2412 | } | |
2413 | ||
2414 | /* | |
2415 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2416 | */ | |
2417 | int cmd_stop_trace(struct ltt_session *session) | |
2418 | { | |
2419 | int ret; | |
2420 | struct ltt_kernel_channel *kchan; | |
2421 | struct ltt_kernel_session *ksession; | |
2422 | struct ltt_ust_session *usess; | |
2423 | ||
2424 | assert(session); | |
2425 | ||
2426 | /* Short cut */ | |
2427 | ksession = session->kernel_session; | |
2428 | usess = session->ust_session; | |
2429 | ||
8382cf6f DG |
2430 | /* Session is not active. Skip everythong and inform the client. */ |
2431 | if (!session->active) { | |
f73fabfd | 2432 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2433 | goto error; |
2434 | } | |
2435 | ||
2f77fc4b | 2436 | /* Kernel tracer */ |
14fb1ebe | 2437 | if (ksession && ksession->active) { |
2f77fc4b DG |
2438 | DBG("Stop kernel tracing"); |
2439 | ||
2440 | /* Flush metadata if exist */ | |
2441 | if (ksession->metadata_stream_fd >= 0) { | |
2442 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2443 | if (ret < 0) { | |
2444 | ERR("Kernel metadata flush failed"); | |
2445 | } | |
2446 | } | |
2447 | ||
2448 | /* Flush all buffers before stopping */ | |
2449 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2450 | ret = kernel_flush_buffer(kchan); | |
2451 | if (ret < 0) { | |
2452 | ERR("Kernel flush buffer error"); | |
2453 | } | |
2454 | } | |
2455 | ||
2456 | ret = kernel_stop_session(ksession); | |
2457 | if (ret < 0) { | |
f73fabfd | 2458 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
2459 | goto error; |
2460 | } | |
2461 | ||
2462 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 | 2463 | |
14fb1ebe | 2464 | ksession->active = 0; |
2f77fc4b DG |
2465 | } |
2466 | ||
14fb1ebe DG |
2467 | if (usess && usess->active) { |
2468 | /* | |
2469 | * Even though the stop trace might fail, flag this session inactive so | |
2470 | * other application coming in are not started by default. | |
2471 | */ | |
2472 | usess->active = 0; | |
2f77fc4b DG |
2473 | |
2474 | ret = ust_app_stop_trace_all(usess); | |
2475 | if (ret < 0) { | |
f73fabfd | 2476 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2477 | goto error; |
2478 | } | |
2479 | } | |
2480 | ||
8382cf6f DG |
2481 | /* Flag inactive after a successful stop. */ |
2482 | session->active = 0; | |
f73fabfd | 2483 | ret = LTTNG_OK; |
2f77fc4b DG |
2484 | |
2485 | error: | |
2486 | return ret; | |
2487 | } | |
2488 | ||
2489 | /* | |
2490 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2491 | */ | |
bda32d56 JG |
2492 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, |
2493 | struct lttng_uri *uris) | |
2f77fc4b DG |
2494 | { |
2495 | int ret, i; | |
2496 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2497 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
2498 | |
2499 | assert(session); | |
2500 | assert(uris); | |
2501 | assert(nb_uri > 0); | |
2502 | ||
8382cf6f DG |
2503 | /* Can't set consumer URI if the session is active. */ |
2504 | if (session->active) { | |
f73fabfd | 2505 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2506 | goto error; |
2507 | } | |
2508 | ||
bda32d56 | 2509 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2510 | for (i = 0; i < nb_uri; i++) { |
bda32d56 JG |
2511 | ret = add_uri_to_consumer(session->consumer, |
2512 | &uris[i], 0, session->name); | |
a74934ba | 2513 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2514 | goto error; |
2515 | } | |
2f77fc4b DG |
2516 | } |
2517 | ||
bda32d56 JG |
2518 | /* Set UST session URIs */ |
2519 | if (session->ust_session) { | |
2520 | for (i = 0; i < nb_uri; i++) { | |
2521 | ret = add_uri_to_consumer( | |
2522 | session->ust_session->consumer, | |
2523 | &uris[i], LTTNG_DOMAIN_UST, | |
2524 | session->name); | |
2525 | if (ret != LTTNG_OK) { | |
2526 | goto error; | |
2527 | } | |
2528 | } | |
2529 | } | |
2530 | ||
2531 | /* Set kernel session URIs */ | |
2532 | if (session->kernel_session) { | |
2533 | for (i = 0; i < nb_uri; i++) { | |
2534 | ret = add_uri_to_consumer( | |
2535 | session->kernel_session->consumer, | |
2536 | &uris[i], LTTNG_DOMAIN_KERNEL, | |
2537 | session->name); | |
2538 | if (ret != LTTNG_OK) { | |
2539 | goto error; | |
2540 | } | |
2541 | } | |
2542 | } | |
2543 | ||
7ab70fe0 DG |
2544 | /* |
2545 | * Make sure to set the session in output mode after we set URI since a | |
2546 | * session can be created without URL (thus flagged in no output mode). | |
2547 | */ | |
2548 | session->output_traces = 1; | |
2549 | if (ksess) { | |
2550 | ksess->output_traces = 1; | |
bda32d56 JG |
2551 | } |
2552 | ||
2553 | if (usess) { | |
7ab70fe0 DG |
2554 | usess->output_traces = 1; |
2555 | } | |
2556 | ||
2f77fc4b | 2557 | /* All good! */ |
f73fabfd | 2558 | ret = LTTNG_OK; |
2f77fc4b DG |
2559 | |
2560 | error: | |
2561 | return ret; | |
2562 | } | |
2563 | ||
2564 | /* | |
2565 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2566 | */ | |
2567 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2568 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2569 | { |
2570 | int ret; | |
2f77fc4b DG |
2571 | struct ltt_session *session; |
2572 | ||
2573 | assert(name); | |
2bba9e53 | 2574 | assert(creds); |
785d2d0d | 2575 | |
2f77fc4b DG |
2576 | /* |
2577 | * Verify if the session already exist | |
2578 | * | |
2579 | * XXX: There is no need for the session lock list here since the caller | |
2580 | * (process_client_msg) is holding it. We might want to change that so a | |
2581 | * single command does not lock the entire session list. | |
2582 | */ | |
2583 | session = session_find_by_name(name); | |
2584 | if (session != NULL) { | |
f73fabfd | 2585 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2586 | goto find_error; |
2587 | } | |
2588 | ||
2589 | /* Create tracing session in the registry */ | |
dec56f6c | 2590 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2591 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2592 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2593 | goto session_error; |
2594 | } | |
2595 | ||
2596 | /* | |
2597 | * Get the newly created session pointer back | |
2598 | * | |
2599 | * XXX: There is no need for the session lock list here since the caller | |
2600 | * (process_client_msg) is holding it. We might want to change that so a | |
2601 | * single command does not lock the entire session list. | |
2602 | */ | |
2603 | session = session_find_by_name(name); | |
2604 | assert(session); | |
2605 | ||
ecc48a90 | 2606 | session->live_timer = live_timer; |
2f77fc4b DG |
2607 | /* Create default consumer output for the session not yet created. */ |
2608 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2609 | if (session->consumer == NULL) { | |
f73fabfd | 2610 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2611 | goto consumer_error; |
2612 | } | |
2613 | ||
2bba9e53 | 2614 | if (uris) { |
bda32d56 | 2615 | ret = cmd_set_consumer_uri(session, nb_uri, uris); |
2bba9e53 DG |
2616 | if (ret != LTTNG_OK) { |
2617 | goto consumer_error; | |
2618 | } | |
2619 | session->output_traces = 1; | |
2620 | } else { | |
2621 | session->output_traces = 0; | |
2622 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2623 | } |
2624 | ||
2625 | session->consumer->enabled = 1; | |
2626 | ||
f73fabfd | 2627 | return LTTNG_OK; |
2f77fc4b DG |
2628 | |
2629 | consumer_error: | |
2630 | session_destroy(session); | |
2631 | session_error: | |
2632 | find_error: | |
2633 | return ret; | |
2634 | } | |
2635 | ||
27babd3a DG |
2636 | /* |
2637 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2638 | */ | |
2639 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2640 | size_t nb_uri, lttng_sock_cred *creds) | |
2641 | { | |
2642 | int ret; | |
2643 | struct ltt_session *session; | |
2644 | struct snapshot_output *new_output = NULL; | |
2645 | ||
2646 | assert(name); | |
2647 | assert(creds); | |
2648 | ||
2649 | /* | |
2650 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2651 | * received are for a default snapshot output if one. | |
2652 | */ | |
ae58b817 | 2653 | ret = cmd_create_session_uri(name, NULL, 0, creds, 0); |
27babd3a DG |
2654 | if (ret != LTTNG_OK) { |
2655 | goto error; | |
2656 | } | |
2657 | ||
2658 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2659 | session = session_find_by_name(name); | |
2660 | assert(session); | |
2661 | ||
2662 | /* Flag session for snapshot mode. */ | |
2663 | session->snapshot_mode = 1; | |
2664 | ||
2665 | /* Skip snapshot output creation if no URI is given. */ | |
2666 | if (nb_uri == 0) { | |
2667 | goto end; | |
2668 | } | |
2669 | ||
2670 | new_output = snapshot_output_alloc(); | |
2671 | if (!new_output) { | |
2672 | ret = LTTNG_ERR_NOMEM; | |
2673 | goto error_snapshot_alloc; | |
2674 | } | |
2675 | ||
2676 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2677 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2678 | if (ret < 0) { | |
2679 | if (ret == -ENOMEM) { | |
2680 | ret = LTTNG_ERR_NOMEM; | |
2681 | } else { | |
2682 | ret = LTTNG_ERR_INVALID; | |
2683 | } | |
2684 | goto error_snapshot; | |
2685 | } | |
2686 | ||
2687 | rcu_read_lock(); | |
2688 | snapshot_add_output(&session->snapshot, new_output); | |
2689 | rcu_read_unlock(); | |
2690 | ||
2691 | end: | |
2692 | return LTTNG_OK; | |
2693 | ||
2694 | error_snapshot: | |
2695 | snapshot_output_destroy(new_output); | |
2696 | error_snapshot_alloc: | |
2697 | session_destroy(session); | |
2698 | error: | |
2699 | return ret; | |
2700 | } | |
2701 | ||
2f77fc4b DG |
2702 | /* |
2703 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
2704 | * |
2705 | * Called with session lock held. | |
2f77fc4b DG |
2706 | */ |
2707 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2708 | { | |
2709 | int ret; | |
2710 | struct ltt_ust_session *usess; | |
2711 | struct ltt_kernel_session *ksess; | |
2712 | ||
2713 | /* Safety net */ | |
2714 | assert(session); | |
2715 | ||
2716 | usess = session->ust_session; | |
2717 | ksess = session->kernel_session; | |
2718 | ||
2719 | /* Clean kernel session teardown */ | |
2720 | kernel_destroy_session(ksess); | |
2721 | ||
2722 | /* UST session teardown */ | |
2723 | if (usess) { | |
2724 | /* Close any relayd session */ | |
2725 | consumer_output_send_destroy_relayd(usess->consumer); | |
2726 | ||
2727 | /* Destroy every UST application related to this session. */ | |
2728 | ret = ust_app_destroy_trace_all(usess); | |
2729 | if (ret) { | |
2730 | ERR("Error in ust_app_destroy_trace_all"); | |
2731 | } | |
2732 | ||
2733 | /* Clean up the rest. */ | |
2734 | trace_ust_destroy_session(usess); | |
2735 | } | |
2736 | ||
2737 | /* | |
2738 | * Must notify the kernel thread here to update it's poll set in order to | |
2739 | * remove the channel(s)' fd just destroyed. | |
2740 | */ | |
2741 | ret = notify_thread_pipe(wpipe); | |
2742 | if (ret < 0) { | |
2743 | PERROR("write kernel poll pipe"); | |
2744 | } | |
2745 | ||
2746 | ret = session_destroy(session); | |
2747 | ||
2748 | return ret; | |
2749 | } | |
2750 | ||
2751 | /* | |
2752 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2753 | */ | |
56a37563 JG |
2754 | int cmd_calibrate(enum lttng_domain_type domain, |
2755 | struct lttng_calibrate *calibrate) | |
2f77fc4b DG |
2756 | { |
2757 | int ret; | |
2758 | ||
2759 | switch (domain) { | |
2760 | case LTTNG_DOMAIN_KERNEL: | |
2761 | { | |
2762 | struct lttng_kernel_calibrate kcalibrate; | |
2763 | ||
2e84128e DG |
2764 | switch (calibrate->type) { |
2765 | case LTTNG_CALIBRATE_FUNCTION: | |
2766 | default: | |
2767 | /* Default and only possible calibrate option. */ | |
2768 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2769 | break; | |
2770 | } | |
2771 | ||
2f77fc4b DG |
2772 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2773 | if (ret < 0) { | |
f73fabfd | 2774 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2775 | goto error; |
2776 | } | |
2777 | break; | |
2778 | } | |
2779 | case LTTNG_DOMAIN_UST: | |
2780 | { | |
2781 | struct lttng_ust_calibrate ucalibrate; | |
2782 | ||
2e84128e DG |
2783 | switch (calibrate->type) { |
2784 | case LTTNG_CALIBRATE_FUNCTION: | |
2785 | default: | |
2786 | /* Default and only possible calibrate option. */ | |
2787 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2788 | break; | |
2789 | } | |
2790 | ||
2f77fc4b DG |
2791 | ret = ust_app_calibrate_glb(&ucalibrate); |
2792 | if (ret < 0) { | |
f73fabfd | 2793 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2794 | goto error; |
2795 | } | |
2796 | break; | |
2797 | } | |
2798 | default: | |
f73fabfd | 2799 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2800 | goto error; |
2801 | } | |
2802 | ||
f73fabfd | 2803 | ret = LTTNG_OK; |
2f77fc4b DG |
2804 | |
2805 | error: | |
2806 | return ret; | |
2807 | } | |
2808 | ||
2809 | /* | |
2810 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2811 | */ | |
56a37563 JG |
2812 | int cmd_register_consumer(struct ltt_session *session, |
2813 | enum lttng_domain_type domain, const char *sock_path, | |
2814 | struct consumer_data *cdata) | |
2f77fc4b DG |
2815 | { |
2816 | int ret, sock; | |
dd81b457 | 2817 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2818 | |
2819 | assert(session); | |
2820 | assert(cdata); | |
2821 | assert(sock_path); | |
2822 | ||
2823 | switch (domain) { | |
2824 | case LTTNG_DOMAIN_KERNEL: | |
2825 | { | |
2826 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2827 | ||
2828 | assert(ksess); | |
2829 | ||
2830 | /* Can't register a consumer if there is already one */ | |
2831 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2832 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2833 | goto error; |
2834 | } | |
2835 | ||
2836 | sock = lttcomm_connect_unix_sock(sock_path); | |
2837 | if (sock < 0) { | |
f73fabfd | 2838 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2839 | goto error; |
2840 | } | |
4ce514c4 | 2841 | cdata->cmd_sock = sock; |
2f77fc4b | 2842 | |
4ce514c4 | 2843 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2844 | if (socket == NULL) { |
f66c074c DG |
2845 | ret = close(sock); |
2846 | if (ret < 0) { | |
2847 | PERROR("close register consumer"); | |
2848 | } | |
4ce514c4 | 2849 | cdata->cmd_sock = -1; |
f73fabfd | 2850 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2851 | goto error; |
2852 | } | |
2853 | ||
2854 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2855 | if (socket->lock == NULL) { | |
2856 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2857 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2858 | goto error; |
2859 | } | |
2860 | pthread_mutex_init(socket->lock, NULL); | |
2861 | socket->registered = 1; | |
2862 | ||
2863 | rcu_read_lock(); | |
2864 | consumer_add_socket(socket, ksess->consumer); | |
2865 | rcu_read_unlock(); | |
2866 | ||
2867 | pthread_mutex_lock(&cdata->pid_mutex); | |
2868 | cdata->pid = -1; | |
2869 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2870 | ||
2871 | break; | |
2872 | } | |
2873 | default: | |
2874 | /* TODO: Userspace tracing */ | |
f73fabfd | 2875 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2876 | goto error; |
2877 | } | |
2878 | ||
dd81b457 | 2879 | return LTTNG_OK; |
2f77fc4b DG |
2880 | |
2881 | error: | |
dd81b457 DG |
2882 | if (socket) { |
2883 | consumer_destroy_socket(socket); | |
2884 | } | |
2f77fc4b DG |
2885 | return ret; |
2886 | } | |
2887 | ||
2888 | /* | |
2889 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2890 | */ | |
2891 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2892 | struct lttng_domain **domains) | |
2893 | { | |
2894 | int ret, index = 0; | |
2895 | ssize_t nb_dom = 0; | |
fefd409b DG |
2896 | struct agent *agt; |
2897 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2898 | |
2899 | if (session->kernel_session != NULL) { | |
2900 | DBG3("Listing domains found kernel domain"); | |
2901 | nb_dom++; | |
2902 | } | |
2903 | ||
2904 | if (session->ust_session != NULL) { | |
2905 | DBG3("Listing domains found UST global domain"); | |
2906 | nb_dom++; | |
3c6a091f | 2907 | |
e0a74f01 | 2908 | rcu_read_lock(); |
fefd409b DG |
2909 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2910 | agt, node.node) { | |
2911 | if (agt->being_used) { | |
2912 | nb_dom++; | |
2913 | } | |
3c6a091f | 2914 | } |
e0a74f01 | 2915 | rcu_read_unlock(); |
2f77fc4b DG |
2916 | } |
2917 | ||
fa64dfb4 JG |
2918 | if (!nb_dom) { |
2919 | goto end; | |
2920 | } | |
2921 | ||
2f77fc4b DG |
2922 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
2923 | if (*domains == NULL) { | |
f73fabfd | 2924 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2925 | goto error; |
2926 | } | |
2927 | ||
2928 | if (session->kernel_session != NULL) { | |
2929 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
b5edb9e8 PP |
2930 | |
2931 | /* Kernel session buffer type is always GLOBAL */ | |
2932 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
2933 | ||
2f77fc4b DG |
2934 | index++; |
2935 | } | |
2936 | ||
2937 | if (session->ust_session != NULL) { | |
2938 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2939 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2940 | index++; |
3c6a091f | 2941 | |
e0a74f01 | 2942 | rcu_read_lock(); |
fefd409b DG |
2943 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2944 | agt, node.node) { | |
2945 | if (agt->being_used) { | |
2946 | (*domains)[index].type = agt->domain; | |
2947 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2948 | index++; | |
2949 | } | |
3c6a091f | 2950 | } |
e0a74f01 | 2951 | rcu_read_unlock(); |
2f77fc4b | 2952 | } |
fa64dfb4 | 2953 | end: |
2f77fc4b DG |
2954 | return nb_dom; |
2955 | ||
2956 | error: | |
f73fabfd DG |
2957 | /* Return negative value to differentiate return code */ |
2958 | return -ret; | |
2f77fc4b DG |
2959 | } |
2960 | ||
2961 | ||
2962 | /* | |
2963 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2964 | */ | |
56a37563 JG |
2965 | ssize_t cmd_list_channels(enum lttng_domain_type domain, |
2966 | struct ltt_session *session, struct lttng_channel **channels) | |
2f77fc4b | 2967 | { |
53e367f9 | 2968 | ssize_t nb_chan = 0, payload_size = 0, ret; |
2f77fc4b DG |
2969 | |
2970 | switch (domain) { | |
2971 | case LTTNG_DOMAIN_KERNEL: | |
2972 | if (session->kernel_session != NULL) { | |
2973 | nb_chan = session->kernel_session->channel_count; | |
2974 | } | |
2975 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 | 2976 | if (nb_chan <= 0) { |
53e367f9 JG |
2977 | ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2978 | goto end; | |
c7d620a2 | 2979 | } |
2f77fc4b DG |
2980 | break; |
2981 | case LTTNG_DOMAIN_UST: | |
2982 | if (session->ust_session != NULL) { | |
7ffc31a2 | 2983 | rcu_read_lock(); |
2f77fc4b | 2984 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
2985 | session->ust_session->domain_global.channels); |
2986 | rcu_read_unlock(); | |
2f77fc4b DG |
2987 | } |
2988 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 2989 | if (nb_chan < 0) { |
53e367f9 JG |
2990 | ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2991 | goto end; | |
c7d620a2 | 2992 | } |
2f77fc4b DG |
2993 | break; |
2994 | default: | |
53e367f9 JG |
2995 | ret = -LTTNG_ERR_UND; |
2996 | goto end; | |
2f77fc4b DG |
2997 | } |
2998 | ||
2999 | if (nb_chan > 0) { | |
53e367f9 JG |
3000 | const size_t channel_size = sizeof(struct lttng_channel) + |
3001 | sizeof(struct lttcomm_channel_extended); | |
3002 | struct lttcomm_channel_extended *channel_exts; | |
3003 | ||
3004 | payload_size = nb_chan * channel_size; | |
3005 | *channels = zmalloc(payload_size); | |
2f77fc4b | 3006 | if (*channels == NULL) { |
53e367f9 JG |
3007 | ret = -LTTNG_ERR_FATAL; |
3008 | goto end; | |
2f77fc4b DG |
3009 | } |
3010 | ||
53e367f9 JG |
3011 | channel_exts = ((void *) *channels) + |
3012 | (nb_chan * sizeof(struct lttng_channel)); | |
3013 | list_lttng_channels(domain, session, *channels, channel_exts); | |
3014 | } else { | |
3015 | *channels = NULL; | |
2f77fc4b DG |
3016 | } |
3017 | ||
53e367f9 JG |
3018 | ret = payload_size; |
3019 | end: | |
3020 | return ret; | |
2f77fc4b DG |
3021 | } |
3022 | ||
3023 | /* | |
3024 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3025 | */ | |
56a37563 JG |
3026 | ssize_t cmd_list_events(enum lttng_domain_type domain, |
3027 | struct ltt_session *session, char *channel_name, | |
b4e3ceb9 | 3028 | struct lttng_event **events, size_t *total_size) |
2f77fc4b DG |
3029 | { |
3030 | int ret = 0; | |
3031 | ssize_t nb_event = 0; | |
3032 | ||
3033 | switch (domain) { | |
3034 | case LTTNG_DOMAIN_KERNEL: | |
3035 | if (session->kernel_session != NULL) { | |
3036 | nb_event = list_lttng_kernel_events(channel_name, | |
b4e3ceb9 PP |
3037 | session->kernel_session, events, |
3038 | total_size); | |
2f77fc4b DG |
3039 | } |
3040 | break; | |
3041 | case LTTNG_DOMAIN_UST: | |
3042 | { | |
3043 | if (session->ust_session != NULL) { | |
3044 | nb_event = list_lttng_ust_global_events(channel_name, | |
b4e3ceb9 PP |
3045 | &session->ust_session->domain_global, events, |
3046 | total_size); | |
2f77fc4b DG |
3047 | } |
3048 | break; | |
3049 | } | |
5cdb6027 | 3050 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3051 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3052 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3053 | if (session->ust_session) { |
fefd409b DG |
3054 | struct lttng_ht_iter iter; |
3055 | struct agent *agt; | |
3056 | ||
b11feea5 | 3057 | rcu_read_lock(); |
fefd409b DG |
3058 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
3059 | &iter.iter, agt, node.node) { | |
1dfd9906 JG |
3060 | if (agt->domain == domain) { |
3061 | nb_event = list_lttng_agent_events( | |
b4e3ceb9 PP |
3062 | agt, events, |
3063 | total_size); | |
1dfd9906 JG |
3064 | break; |
3065 | } | |
fefd409b | 3066 | } |
b11feea5 | 3067 | rcu_read_unlock(); |
3c6a091f DG |
3068 | } |
3069 | break; | |
2f77fc4b | 3070 | default: |
f73fabfd | 3071 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3072 | goto error; |
3073 | } | |
3074 | ||
f73fabfd | 3075 | return nb_event; |
2f77fc4b DG |
3076 | |
3077 | error: | |
f73fabfd DG |
3078 | /* Return negative value to differentiate return code */ |
3079 | return -ret; | |
2f77fc4b DG |
3080 | } |
3081 | ||
3082 | /* | |
3083 | * Using the session list, filled a lttng_session array to send back to the | |
3084 | * client for session listing. | |
3085 | * | |
3086 | * The session list lock MUST be acquired before calling this function. Use | |
3087 | * session_lock_list() and session_unlock_list(). | |
3088 | */ | |
3089 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
3090 | gid_t gid) | |
3091 | { | |
3092 | int ret; | |
3093 | unsigned int i = 0; | |
3094 | struct ltt_session *session; | |
3095 | struct ltt_session_list *list = session_get_list(); | |
3096 | ||
3097 | DBG("Getting all available session for UID %d GID %d", | |
3098 | uid, gid); | |
3099 | /* | |
3100 | * Iterate over session list and append data after the control struct in | |
3101 | * the buffer. | |
3102 | */ | |
3103 | cds_list_for_each_entry(session, &list->head, list) { | |
3104 | /* | |
3105 | * Only list the sessions the user can control. | |
3106 | */ | |
3107 | if (!session_access_ok(session, uid, gid)) { | |
3108 | continue; | |
3109 | } | |
3110 | ||
3111 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3112 | struct ltt_ust_session *usess = session->ust_session; | |
3113 | ||
3114 | if (session->consumer->type == CONSUMER_DST_NET || | |
3115 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
3116 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3117 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 3118 | sizeof(sessions[i].path), session); |
2f77fc4b | 3119 | } else { |
dec56f6c | 3120 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
3121 | session->consumer->dst.trace_path); |
3122 | } | |
3123 | if (ret < 0) { | |
3124 | PERROR("snprintf session path"); | |
3125 | continue; | |
3126 | } | |
3127 | ||
3128 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
3129 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 3130 | sessions[i].enabled = session->active; |
2cbf8fed | 3131 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 3132 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
3133 | i++; |
3134 | } | |
3135 | } | |
3136 | ||
806e2684 | 3137 | /* |
6d805429 | 3138 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 3139 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 3140 | */ |
6d805429 | 3141 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
3142 | { |
3143 | int ret; | |
3144 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3145 | struct ltt_ust_session *usess = session->ust_session; | |
3146 | ||
3147 | assert(session); | |
3148 | ||
3149 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 3150 | if (session->active) { |
806e2684 DG |
3151 | ret = LTTNG_ERR_SESSION_STARTED; |
3152 | goto error; | |
3a89d11a DG |
3153 | } else { |
3154 | /* | |
3155 | * If stopped, just make sure we've started before else the above call | |
3156 | * will always send that there is data pending. | |
3157 | * | |
3158 | * The consumer assumes that when the data pending command is received, | |
3159 | * the trace has been started before or else no output data is written | |
3160 | * by the streams which is a condition for data pending. So, this is | |
3161 | * *VERY* important that we don't ask the consumer before a start | |
3162 | * trace. | |
3163 | */ | |
8382cf6f | 3164 | if (!session->has_been_started) { |
3a89d11a DG |
3165 | ret = 0; |
3166 | goto error; | |
3167 | } | |
806e2684 DG |
3168 | } |
3169 | ||
3170 | if (ksess && ksess->consumer) { | |
6d805429 DG |
3171 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
3172 | if (ret == 1) { | |
806e2684 DG |
3173 | /* Data is still being extracted for the kernel. */ |
3174 | goto error; | |
3175 | } | |
3176 | } | |
3177 | ||
3178 | if (usess && usess->consumer) { | |
6d805429 DG |
3179 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
3180 | if (ret == 1) { | |
806e2684 DG |
3181 | /* Data is still being extracted for the kernel. */ |
3182 | goto error; | |
3183 | } | |
3184 | } | |
3185 | ||
3186 | /* Data is ready to be read by a viewer */ | |
6d805429 | 3187 | ret = 0; |
806e2684 DG |
3188 | |
3189 | error: | |
3190 | return ret; | |
3191 | } | |
3192 | ||
6dc3064a DG |
3193 | /* |
3194 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
3195 | * | |
3196 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3197 | */ | |
3198 | int cmd_snapshot_add_output(struct ltt_session *session, | |
3199 | struct lttng_snapshot_output *output, uint32_t *id) | |
3200 | { | |
3201 | int ret; | |
3202 | struct snapshot_output *new_output; | |
3203 | ||
3204 | assert(session); | |
3205 | assert(output); | |
3206 | ||
3207 | DBG("Cmd snapshot add output for session %s", session->name); | |
3208 | ||
3209 | /* | |
d3f14b8a MD |
3210 | * Permission denied to create an output if the session is not |
3211 | * set in no output mode. | |
6dc3064a DG |
3212 | */ |
3213 | if (session->output_traces) { | |
3214 | ret = LTTNG_ERR_EPERM; | |
3215 | goto error; | |
3216 | } | |
3217 | ||
3218 | /* Only one output is allowed until we have the "tee" feature. */ | |
3219 | if (session->snapshot.nb_output == 1) { | |
3220 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
3221 | goto error; | |
3222 | } | |
3223 | ||
3224 | new_output = snapshot_output_alloc(); | |
3225 | if (!new_output) { | |
3226 | ret = LTTNG_ERR_NOMEM; | |
3227 | goto error; | |
3228 | } | |
3229 | ||
3230 | ret = snapshot_output_init(output->max_size, output->name, | |
3231 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
3232 | &session->snapshot); | |
3233 | if (ret < 0) { | |
3234 | if (ret == -ENOMEM) { | |
3235 | ret = LTTNG_ERR_NOMEM; | |
3236 | } else { | |
3237 | ret = LTTNG_ERR_INVALID; | |
3238 | } | |
3239 | goto free_error; | |
3240 | } | |
3241 | ||
6dc3064a DG |
3242 | rcu_read_lock(); |
3243 | snapshot_add_output(&session->snapshot, new_output); | |
3244 | if (id) { | |
3245 | *id = new_output->id; | |
3246 | } | |
3247 | rcu_read_unlock(); | |
3248 | ||
3249 | return LTTNG_OK; | |
3250 | ||
3251 | free_error: | |
3252 | snapshot_output_destroy(new_output); | |
3253 | error: | |
3254 | return ret; | |
3255 | } | |
3256 | ||
3257 | /* | |
3258 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
3259 | * | |
3260 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3261 | */ | |
3262 | int cmd_snapshot_del_output(struct ltt_session *session, | |
3263 | struct lttng_snapshot_output *output) | |
3264 | { | |
3265 | int ret; | |
eb240553 | 3266 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
3267 | |
3268 | assert(session); | |
3269 | assert(output); | |
3270 | ||
6dc3064a DG |
3271 | rcu_read_lock(); |
3272 | ||
3273 | /* | |
d3f14b8a MD |
3274 | * Permission denied to create an output if the session is not |
3275 | * set in no output mode. | |
6dc3064a DG |
3276 | */ |
3277 | if (session->output_traces) { | |
3278 | ret = LTTNG_ERR_EPERM; | |
3279 | goto error; | |
3280 | } | |
3281 | ||
eb240553 DG |
3282 | if (output->id) { |
3283 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
3284 | session->name); | |
3285 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
3286 | } else if (*output->name != '\0') { | |
3287 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
3288 | session->name); | |
3289 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
3290 | } | |
6dc3064a DG |
3291 | if (!sout) { |
3292 | ret = LTTNG_ERR_INVALID; | |
3293 | goto error; | |
3294 | } | |
3295 | ||
3296 | snapshot_delete_output(&session->snapshot, sout); | |
3297 | snapshot_output_destroy(sout); | |
3298 | ret = LTTNG_OK; | |
3299 | ||
3300 | error: | |
3301 | rcu_read_unlock(); | |
3302 | return ret; | |
3303 | } | |
3304 | ||
3305 | /* | |
3306 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
3307 | * | |
3308 | * If no output is available, outputs is untouched and 0 is returned. | |
3309 | * | |
3310 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
3311 | */ | |
3312 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
3313 | struct lttng_snapshot_output **outputs) | |
3314 | { | |
3315 | int ret, idx = 0; | |
b223ca94 | 3316 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
3317 | struct lttng_ht_iter iter; |
3318 | struct snapshot_output *output; | |
3319 | ||
3320 | assert(session); | |
3321 | assert(outputs); | |
3322 | ||
3323 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
3324 | ||
3325 | /* | |
d3f14b8a MD |
3326 | * Permission denied to create an output if the session is not |
3327 | * set in no output mode. | |
6dc3064a DG |
3328 | */ |
3329 | if (session->output_traces) { | |
b223ca94 | 3330 | ret = -LTTNG_ERR_EPERM; |
6dc3064a DG |
3331 | goto error; |
3332 | } | |
3333 | ||
3334 | if (session->snapshot.nb_output == 0) { | |
3335 | ret = 0; | |
3336 | goto error; | |
3337 | } | |
3338 | ||
3339 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
3340 | if (!list) { | |
b223ca94 | 3341 | ret = -LTTNG_ERR_NOMEM; |
6dc3064a DG |
3342 | goto error; |
3343 | } | |
3344 | ||
3345 | /* Copy list from session to the new list object. */ | |
b223ca94 | 3346 | rcu_read_lock(); |
6dc3064a DG |
3347 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
3348 | output, node.node) { | |
3349 | assert(output->consumer); | |
3350 | list[idx].id = output->id; | |
3351 | list[idx].max_size = output->max_size; | |
3352 | strncpy(list[idx].name, output->name, sizeof(list[idx].name)); | |
3353 | if (output->consumer->type == CONSUMER_DST_LOCAL) { | |
3354 | strncpy(list[idx].ctrl_url, output->consumer->dst.trace_path, | |
3355 | sizeof(list[idx].ctrl_url)); | |
3356 | } else { | |
3357 | /* Control URI. */ | |
3358 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
3359 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
3360 | if (ret < 0) { | |
b223ca94 JG |
3361 | ret = -LTTNG_ERR_NOMEM; |
3362 | goto error; | |
6dc3064a DG |
3363 | } |
3364 | ||
3365 | /* Data URI. */ | |
3366 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
3367 | list[idx].data_url, sizeof(list[idx].data_url)); | |
3368 | if (ret < 0) { | |
b223ca94 JG |
3369 | ret = -LTTNG_ERR_NOMEM; |
3370 | goto error; | |
6dc3064a DG |
3371 | } |
3372 | } | |
3373 | idx++; | |
3374 | } | |
3375 | ||
3376 | *outputs = list; | |
b223ca94 JG |
3377 | list = NULL; |
3378 | ret = session->snapshot.nb_output; | |
6dc3064a | 3379 | error: |
b223ca94 JG |
3380 | free(list); |
3381 | rcu_read_unlock(); | |
3382 | return ret; | |
6dc3064a DG |
3383 | } |
3384 | ||
93ec662e JD |
3385 | /* |
3386 | * Check if we can regenerate the metadata for this session. | |
3387 | * Only kernel, UST per-uid and non-live sessions are supported. | |
3388 | * | |
3389 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
3390 | */ | |
3391 | static | |
3392 | int check_metadata_regenerate_support(struct ltt_session *session) | |
3393 | { | |
3394 | int ret; | |
3395 | ||
3396 | assert(session); | |
3397 | ||
3398 | if (session->live_timer != 0) { | |
3399 | ret = LTTNG_ERR_LIVE_SESSION; | |
3400 | goto end; | |
3401 | } | |
3402 | if (!session->active) { | |
3403 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
3404 | goto end; | |
3405 | } | |
3406 | if (session->ust_session) { | |
3407 | switch (session->ust_session->buffer_type) { | |
3408 | case LTTNG_BUFFER_PER_UID: | |
3409 | break; | |
3410 | case LTTNG_BUFFER_PER_PID: | |
3411 | ret = LTTNG_ERR_PER_PID_SESSION; | |
3412 | goto end; | |
3413 | default: | |
3414 | assert(0); | |
3415 | ret = LTTNG_ERR_UNK; | |
3416 | goto end; | |
3417 | } | |
3418 | } | |
3419 | if (session->consumer->type == CONSUMER_DST_NET && | |
3420 | session->consumer->relay_minor_version < 8) { | |
3421 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; | |
3422 | goto end; | |
3423 | } | |
3424 | ret = 0; | |
3425 | ||
3426 | end: | |
3427 | return ret; | |
3428 | } | |
3429 | ||
3430 | static | |
3431 | int ust_metadata_regenerate(struct ltt_ust_session *usess) | |
3432 | { | |
3433 | int ret = 0; | |
3434 | struct buffer_reg_uid *uid_reg = NULL; | |
3435 | struct buffer_reg_session *session_reg = NULL; | |
3436 | ||
3437 | rcu_read_lock(); | |
3438 | cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { | |
3439 | struct ust_registry_session *registry; | |
3440 | struct ust_registry_channel *chan; | |
3441 | struct lttng_ht_iter iter_chan; | |
3442 | ||
3443 | session_reg = uid_reg->registry; | |
3444 | registry = session_reg->reg.ust; | |
3445 | ||
3446 | pthread_mutex_lock(®istry->lock); | |
3447 | registry->metadata_len_sent = 0; | |
3448 | memset(registry->metadata, 0, registry->metadata_alloc_len); | |
3449 | registry->metadata_len = 0; | |
3450 | registry->metadata_version++; | |
3451 | ret = ust_metadata_session_statedump(registry, NULL, | |
3452 | registry->major, registry->minor); | |
3453 | if (ret) { | |
3454 | pthread_mutex_unlock(®istry->lock); | |
3455 | ERR("Failed to generate session metadata (err = %d)", | |
3456 | ret); | |
3457 | goto end; | |
3458 | } | |
3459 | cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, | |
3460 | chan, node.node) { | |
3461 | struct ust_registry_event *event; | |
3462 | struct lttng_ht_iter iter_event; | |
3463 | ||
3464 | ret = ust_metadata_channel_statedump(registry, chan); | |
3465 | if (ret) { | |
3466 | pthread_mutex_unlock(®istry->lock); | |
3467 | ERR("Failed to generate channel metadata " | |
3468 | "(err = %d)", ret); | |
3469 | goto end; | |
3470 | } | |
3471 | cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, | |
3472 | event, node.node) { | |
3473 | ret = ust_metadata_event_statedump(registry, | |
3474 | chan, event); | |
3475 | if (ret) { | |
3476 | pthread_mutex_unlock(®istry->lock); | |
3477 | ERR("Failed to generate event metadata " | |
3478 | "(err = %d)", ret); | |
3479 | goto end; | |
3480 | } | |
3481 | } | |
3482 | } | |
3483 | pthread_mutex_unlock(®istry->lock); | |
3484 | } | |
3485 | ||
3486 | end: | |
3487 | rcu_read_unlock(); | |
3488 | return ret; | |
3489 | } | |
3490 | ||
3491 | /* | |
3492 | * Command LTTNG_METADATA_REGENERATE from the lttng-ctl library. | |
3493 | * | |
3494 | * Ask the consumer to truncate the existing metadata file(s) and | |
3495 | * then regenerate the metadata. Live and per-pid sessions are not | |
3496 | * supported and return an error. | |
3497 | * | |
3498 | * Return 0 on success or else a LTTNG_ERR code. | |
3499 | */ | |
3500 | int cmd_metadata_regenerate(struct ltt_session *session) | |
3501 | { | |
3502 | int ret; | |
3503 | ||
3504 | assert(session); | |
3505 | ||
3506 | ret = check_metadata_regenerate_support(session); | |
3507 | if (ret) { | |
3508 | goto end; | |
3509 | } | |
3510 | ||
3511 | if (session->kernel_session) { | |
3512 | ret = kernctl_session_metadata_regenerate( | |
3513 | session->kernel_session->fd); | |
3514 | if (ret < 0) { | |
3515 | ERR("Failed to regenerate the kernel metadata"); | |
3516 | goto end; | |
3517 | } | |
3518 | } | |
3519 | ||
3520 | if (session->ust_session) { | |
3521 | ret = ust_metadata_regenerate(session->ust_session); | |
3522 | if (ret < 0) { | |
3523 | ERR("Failed to regenerate the UST metadata"); | |
3524 | goto end; | |
3525 | } | |
3526 | } | |
3527 | DBG("Cmd metadata regenerate for session %s", session->name); | |
3528 | ret = LTTNG_OK; | |
3529 | ||
3530 | end: | |
3531 | return ret; | |
3532 | } | |
3533 | ||
3534 | ||
6dc3064a DG |
3535 | /* |
3536 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
3537 | * snapshot output is *not* set with a remote destination. | |
3538 | * | |
a934f4af | 3539 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
3540 | */ |
3541 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
3542 | struct snapshot_output *snap_output, struct ltt_session *session) | |
3543 | { | |
a934f4af | 3544 | int ret = LTTNG_OK; |
6dc3064a DG |
3545 | struct lttng_ht_iter iter; |
3546 | struct consumer_socket *socket; | |
3547 | ||
3548 | assert(consumer); | |
3549 | assert(snap_output); | |
3550 | assert(session); | |
3551 | ||
3552 | DBG2("Set relayd object from snapshot output"); | |
3553 | ||
3554 | /* Ignore if snapshot consumer output is not network. */ | |
3555 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
3556 | goto error; | |
3557 | } | |
3558 | ||
3559 | /* | |
3560 | * For each consumer socket, create and send the relayd object of the | |
3561 | * snapshot output. | |
3562 | */ | |
3563 | rcu_read_lock(); | |
5eecee74 DG |
3564 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
3565 | socket, node.node) { | |
6dc3064a | 3566 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
3567 | snap_output->consumer, socket, |
3568 | session->name, session->hostname, | |
3569 | session->live_timer); | |
a934f4af | 3570 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3571 | rcu_read_unlock(); |
3572 | goto error; | |
3573 | } | |
3574 | } | |
3575 | rcu_read_unlock(); | |
3576 | ||
3577 | error: | |
3578 | return ret; | |
3579 | } | |
3580 | ||
3581 | /* | |
3582 | * Record a kernel snapshot. | |
3583 | * | |
fac41e72 | 3584 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
3585 | */ |
3586 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded | 3587 | struct snapshot_output *output, struct ltt_session *session, |
d07ceecd | 3588 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3589 | { |
3590 | int ret; | |
3591 | ||
3592 | assert(ksess); | |
3593 | assert(output); | |
3594 | assert(session); | |
3595 | ||
10a50311 | 3596 | |
af706bb7 DG |
3597 | /* |
3598 | * Copy kernel session sockets so we can communicate with the right | |
3599 | * consumer for the snapshot record command. | |
3600 | */ | |
3601 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
3602 | if (ret < 0) { | |
a934f4af | 3603 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3604 | goto error; |
6dc3064a DG |
3605 | } |
3606 | ||
3607 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 3608 | if (ret != LTTNG_OK) { |
af706bb7 | 3609 | goto error_snapshot; |
6dc3064a DG |
3610 | } |
3611 | ||
d07ceecd | 3612 | ret = kernel_snapshot_record(ksess, output, wait, nb_packets_per_stream); |
2a06df8d | 3613 | if (ret != LTTNG_OK) { |
af706bb7 | 3614 | goto error_snapshot; |
6dc3064a DG |
3615 | } |
3616 | ||
a934f4af | 3617 | ret = LTTNG_OK; |
1371fc12 | 3618 | goto end; |
a934f4af | 3619 | |
af706bb7 DG |
3620 | error_snapshot: |
3621 | /* Clean up copied sockets so this output can use some other later on. */ | |
3622 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a | 3623 | error: |
1371fc12 | 3624 | end: |
6dc3064a DG |
3625 | return ret; |
3626 | } | |
3627 | ||
3628 | /* | |
3629 | * Record a UST snapshot. | |
3630 | * | |
a934f4af | 3631 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
3632 | */ |
3633 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 3634 | struct snapshot_output *output, struct ltt_session *session, |
d07ceecd | 3635 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3636 | { |
3637 | int ret; | |
3638 | ||
3639 | assert(usess); | |
3640 | assert(output); | |
3641 | assert(session); | |
3642 | ||
af706bb7 | 3643 | /* |
d3f14b8a | 3644 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
3645 | * consumer for the snapshot record command. |
3646 | */ | |
3647 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
3648 | if (ret < 0) { | |
a934f4af | 3649 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3650 | goto error; |
6dc3064a DG |
3651 | } |
3652 | ||
3653 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 3654 | if (ret != LTTNG_OK) { |
af706bb7 | 3655 | goto error_snapshot; |
6dc3064a DG |
3656 | } |
3657 | ||
d07ceecd | 3658 | ret = ust_app_snapshot_record(usess, output, wait, nb_packets_per_stream); |
6dc3064a | 3659 | if (ret < 0) { |
7badf927 DG |
3660 | switch (-ret) { |
3661 | case EINVAL: | |
a934f4af | 3662 | ret = LTTNG_ERR_INVALID; |
7badf927 DG |
3663 | break; |
3664 | case ENODATA: | |
3665 | ret = LTTNG_ERR_SNAPSHOT_NODATA; | |
3666 | break; | |
3667 | default: | |
3668 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
3669 | break; | |
5c786ded | 3670 | } |
af706bb7 | 3671 | goto error_snapshot; |
6dc3064a DG |
3672 | } |
3673 | ||
a934f4af DG |
3674 | ret = LTTNG_OK; |
3675 | ||
af706bb7 DG |
3676 | error_snapshot: |
3677 | /* Clean up copied sockets so this output can use some other later on. */ | |
3678 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
3679 | error: |
3680 | return ret; | |
3681 | } | |
3682 | ||
d07ceecd MD |
3683 | static |
3684 | uint64_t get_session_size_one_more_packet_per_stream(struct ltt_session *session, | |
3685 | uint64_t cur_nr_packets) | |
68808f4e | 3686 | { |
d07ceecd | 3687 | uint64_t tot_size = 0; |
68808f4e DG |
3688 | |
3689 | if (session->kernel_session) { | |
3690 | struct ltt_kernel_channel *chan; | |
3691 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3692 | ||
68808f4e | 3693 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
3694 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
3695 | /* | |
3696 | * Don't take channel into account if we | |
3697 | * already grab all its packets. | |
3698 | */ | |
3699 | continue; | |
68808f4e | 3700 | } |
d07ceecd MD |
3701 | tot_size += chan->channel->attr.subbuf_size |
3702 | * chan->stream_count; | |
68808f4e DG |
3703 | } |
3704 | } | |
3705 | ||
3706 | if (session->ust_session) { | |
68808f4e DG |
3707 | struct ltt_ust_session *usess = session->ust_session; |
3708 | ||
d07ceecd MD |
3709 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
3710 | cur_nr_packets); | |
68808f4e DG |
3711 | } |
3712 | ||
d07ceecd | 3713 | return tot_size; |
68808f4e DG |
3714 | } |
3715 | ||
5c786ded | 3716 | /* |
d07ceecd MD |
3717 | * Calculate the number of packets we can grab from each stream that |
3718 | * fits within the overall snapshot max size. | |
3719 | * | |
3720 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
3721 | * the number of packets per stream. | |
3722 | * | |
3723 | * TODO: this approach is not perfect: we consider the worse case | |
3724 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
3725 | * better if we do this calculation while we actually grab the packet | |
3726 | * content: we would know how much padding we don't actually store into | |
3727 | * the file. | |
3728 | * | |
3729 | * This algorithm is currently bounded by the number of packets per | |
3730 | * stream. | |
3731 | * | |
3732 | * Since we call this algorithm before actually grabbing the data, it's | |
3733 | * an approximation: for instance, applications could appear/disappear | |
3734 | * in between this call and actually grabbing data. | |
5c786ded | 3735 | */ |
d07ceecd MD |
3736 | static |
3737 | int64_t get_session_nb_packets_per_stream(struct ltt_session *session, uint64_t max_size) | |
5c786ded | 3738 | { |
d07ceecd MD |
3739 | int64_t size_left; |
3740 | uint64_t cur_nb_packets = 0; | |
5c786ded | 3741 | |
d07ceecd MD |
3742 | if (!max_size) { |
3743 | return 0; /* Infinite */ | |
5c786ded JD |
3744 | } |
3745 | ||
d07ceecd MD |
3746 | size_left = max_size; |
3747 | for (;;) { | |
3748 | uint64_t one_more_packet_tot_size; | |
5c786ded | 3749 | |
d07ceecd MD |
3750 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream(session, |
3751 | cur_nb_packets); | |
3752 | if (!one_more_packet_tot_size) { | |
3753 | /* We are already grabbing all packets. */ | |
3754 | break; | |
3755 | } | |
3756 | size_left -= one_more_packet_tot_size; | |
3757 | if (size_left < 0) { | |
3758 | break; | |
3759 | } | |
3760 | cur_nb_packets++; | |
5c786ded | 3761 | } |
d07ceecd MD |
3762 | if (!cur_nb_packets) { |
3763 | /* Not enough room to grab one packet of each stream, error. */ | |
3764 | return -1; | |
3765 | } | |
3766 | return cur_nb_packets; | |
5c786ded JD |
3767 | } |
3768 | ||
6dc3064a DG |
3769 | /* |
3770 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3771 | * | |
3772 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3773 | * complete before returning. | |
3774 | * | |
3775 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3776 | */ | |
3777 | int cmd_snapshot_record(struct ltt_session *session, | |
3778 | struct lttng_snapshot_output *output, int wait) | |
3779 | { | |
3780 | int ret = LTTNG_OK; | |
e1986656 DG |
3781 | unsigned int use_tmp_output = 0; |
3782 | struct snapshot_output tmp_output; | |
00e1dfc4 | 3783 | unsigned int snapshot_success = 0; |
10ba83fe | 3784 | char datetime[16]; |
6dc3064a DG |
3785 | |
3786 | assert(session); | |
ba45d9f0 | 3787 | assert(output); |
6dc3064a DG |
3788 | |
3789 | DBG("Cmd snapshot record for session %s", session->name); | |
3790 | ||
10ba83fe JR |
3791 | /* Get the datetime for the snapshot output directory. */ |
3792 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
3793 | sizeof(datetime)); | |
3794 | if (!ret) { | |
3795 | ret = LTTNG_ERR_INVALID; | |
3796 | goto error; | |
3797 | } | |
3798 | ||
6dc3064a | 3799 | /* |
d3f14b8a MD |
3800 | * Permission denied to create an output if the session is not |
3801 | * set in no output mode. | |
6dc3064a DG |
3802 | */ |
3803 | if (session->output_traces) { | |
3804 | ret = LTTNG_ERR_EPERM; | |
3805 | goto error; | |
3806 | } | |
3807 | ||
3808 | /* The session needs to be started at least once. */ | |
8382cf6f | 3809 | if (!session->has_been_started) { |
6dc3064a DG |
3810 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3811 | goto error; | |
3812 | } | |
3813 | ||
3814 | /* Use temporary output for the session. */ | |
ba45d9f0 | 3815 | if (*output->ctrl_url != '\0') { |
6dc3064a DG |
3816 | ret = snapshot_output_init(output->max_size, output->name, |
3817 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3818 | &tmp_output, NULL); |
6dc3064a DG |
3819 | if (ret < 0) { |
3820 | if (ret == -ENOMEM) { | |
3821 | ret = LTTNG_ERR_NOMEM; | |
3822 | } else { | |
3823 | ret = LTTNG_ERR_INVALID; | |
3824 | } | |
3825 | goto error; | |
3826 | } | |
1bfe7328 DG |
3827 | /* Use the global session count for the temporary snapshot. */ |
3828 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
10ba83fe JR |
3829 | |
3830 | /* Use the global datetime */ | |
3831 | memcpy(tmp_output.datetime, datetime, sizeof(datetime)); | |
e1986656 | 3832 | use_tmp_output = 1; |
6dc3064a DG |
3833 | } |
3834 | ||
804c90a8 JR |
3835 | if (use_tmp_output) { |
3836 | int64_t nb_packets_per_stream; | |
6dc3064a | 3837 | |
804c90a8 JR |
3838 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, |
3839 | tmp_output.max_size); | |
3840 | if (nb_packets_per_stream < 0) { | |
3841 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3842 | goto error; | |
3843 | } | |
d07ceecd | 3844 | |
804c90a8 JR |
3845 | if (session->kernel_session) { |
3846 | ret = record_kernel_snapshot(session->kernel_session, | |
3847 | &tmp_output, session, | |
3848 | wait, nb_packets_per_stream); | |
3849 | if (ret != LTTNG_OK) { | |
d07ceecd MD |
3850 | goto error; |
3851 | } | |
804c90a8 JR |
3852 | } |
3853 | ||
3854 | if (session->ust_session) { | |
3855 | ret = record_ust_snapshot(session->ust_session, | |
3856 | &tmp_output, session, | |
d07ceecd | 3857 | wait, nb_packets_per_stream); |
a934f4af | 3858 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3859 | goto error; |
3860 | } | |
804c90a8 | 3861 | } |
e1986656 | 3862 | |
804c90a8 JR |
3863 | snapshot_success = 1; |
3864 | } else { | |
3865 | struct snapshot_output *sout; | |
3866 | struct lttng_ht_iter iter; | |
68808f4e | 3867 | |
804c90a8 JR |
3868 | rcu_read_lock(); |
3869 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3870 | &iter.iter, sout, node.node) { | |
3871 | int64_t nb_packets_per_stream; | |
e1986656 | 3872 | |
804c90a8 JR |
3873 | /* |
3874 | * Make a local copy of the output and assign the possible | |
3875 | * temporary value given by the caller. | |
3876 | */ | |
3877 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3878 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
1bfe7328 | 3879 | |
804c90a8 JR |
3880 | if (output->max_size != (uint64_t) -1ULL) { |
3881 | tmp_output.max_size = output->max_size; | |
6dc3064a | 3882 | } |
d07ceecd MD |
3883 | |
3884 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
3885 | tmp_output.max_size); | |
3886 | if (nb_packets_per_stream < 0) { | |
3887 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
804c90a8 | 3888 | rcu_read_unlock(); |
d07ceecd MD |
3889 | goto error; |
3890 | } | |
6dc3064a | 3891 | |
804c90a8 JR |
3892 | /* Use temporary name. */ |
3893 | if (*output->name != '\0') { | |
3894 | strncpy(tmp_output.name, output->name, | |
3895 | sizeof(tmp_output.name)); | |
3896 | } | |
e1986656 | 3897 | |
804c90a8 | 3898 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe | 3899 | memcpy(tmp_output.datetime, datetime, sizeof(datetime)); |
e1986656 | 3900 | |
804c90a8 JR |
3901 | if (session->kernel_session) { |
3902 | ret = record_kernel_snapshot(session->kernel_session, | |
3903 | &tmp_output, session, | |
3904 | wait, nb_packets_per_stream); | |
3905 | if (ret != LTTNG_OK) { | |
d07ceecd | 3906 | rcu_read_unlock(); |
68808f4e DG |
3907 | goto error; |
3908 | } | |
804c90a8 | 3909 | } |
68808f4e | 3910 | |
804c90a8 JR |
3911 | if (session->ust_session) { |
3912 | ret = record_ust_snapshot(session->ust_session, | |
3913 | &tmp_output, session, | |
d07ceecd | 3914 | wait, nb_packets_per_stream); |
a934f4af | 3915 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3916 | rcu_read_unlock(); |
3917 | goto error; | |
3918 | } | |
3919 | } | |
804c90a8 | 3920 | snapshot_success = 1; |
6dc3064a | 3921 | } |
804c90a8 | 3922 | rcu_read_unlock(); |
6dc3064a DG |
3923 | } |
3924 | ||
1bfe7328 DG |
3925 | if (snapshot_success) { |
3926 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3927 | } else { |
3928 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3929 | } |
3930 | ||
6dc3064a | 3931 | error: |
6dc3064a DG |
3932 | return ret; |
3933 | } | |
3934 | ||
d7ba1388 MD |
3935 | /* |
3936 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
3937 | */ | |
3938 | int cmd_set_session_shm_path(struct ltt_session *session, | |
3939 | const char *shm_path) | |
3940 | { | |
3941 | /* Safety net */ | |
3942 | assert(session); | |
3943 | ||
3944 | /* | |
3945 | * Can only set shm path before session is started. | |
3946 | */ | |
3947 | if (session->has_been_started) { | |
3948 | return LTTNG_ERR_SESSION_STARTED; | |
3949 | } | |
3950 | ||
3951 | strncpy(session->shm_path, shm_path, | |
3952 | sizeof(session->shm_path)); | |
3953 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
3954 | ||
3955 | return 0; | |
3956 | } | |
3957 | ||
2f77fc4b DG |
3958 | /* |
3959 | * Init command subsystem. | |
3960 | */ | |
3961 | void cmd_init(void) | |
3962 | { | |
3963 | /* | |
d88aee68 DG |
3964 | * Set network sequence index to 1 for streams to match a relayd |
3965 | * socket on the consumer side. | |
2f77fc4b | 3966 | */ |
d88aee68 DG |
3967 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3968 | relayd_net_seq_idx = 1; | |
3969 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3970 | |
3971 | DBG("Command subsystem initialized"); | |
3972 | } |