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> | |
a503e1ef | 24 | #include <sys/stat.h> |
d2956687 | 25 | #include <stdio.h> |
2f77fc4b DG |
26 | |
27 | #include <common/defaults.h> | |
28 | #include <common/common.h> | |
29 | #include <common/sessiond-comm/sessiond-comm.h> | |
30 | #include <common/relayd/relayd.h> | |
10a50311 | 31 | #include <common/utils.h> |
f5436bfc | 32 | #include <common/compat/string.h> |
93ec662e | 33 | #include <common/kernel-ctl/kernel-ctl.h> |
b0880ae5 JG |
34 | #include <common/dynamic-buffer.h> |
35 | #include <common/buffer-view.h> | |
82b69413 | 36 | #include <common/trace-chunk.h> |
3e3665b8 | 37 | #include <lttng/location-internal.h> |
b0880ae5 JG |
38 | #include <lttng/trigger/trigger-internal.h> |
39 | #include <lttng/condition/condition.h> | |
40 | #include <lttng/action/action.h> | |
6e21424e | 41 | #include <lttng/channel.h> |
b0880ae5 | 42 | #include <lttng/channel-internal.h> |
5c408ad8 | 43 | #include <lttng/rotate-internal.h> |
17dd1232 | 44 | #include <lttng/location-internal.h> |
b178f53e | 45 | #include <lttng/session-internal.h> |
3c02e545 | 46 | #include <lttng/userspace-probe-internal.h> |
b178f53e | 47 | #include <lttng/session-descriptor-internal.h> |
9f449915 | 48 | #include <common/string-utils/string-utils.h> |
2f77fc4b DG |
49 | |
50 | #include "channel.h" | |
51 | #include "consumer.h" | |
52 | #include "event.h" | |
8782cc74 | 53 | #include "health-sessiond.h" |
2f77fc4b DG |
54 | #include "kernel.h" |
55 | #include "kernel-consumer.h" | |
56 | #include "lttng-sessiond.h" | |
57 | #include "utils.h" | |
0dbc2034 | 58 | #include "lttng-syscall.h" |
7c1d2758 | 59 | #include "agent.h" |
93ec662e | 60 | #include "buffer-registry.h" |
b0880ae5 JG |
61 | #include "notification-thread.h" |
62 | #include "notification-thread-commands.h" | |
5c408ad8 JD |
63 | #include "rotate.h" |
64 | #include "rotation-thread.h" | |
8e319828 | 65 | #include "timer.h" |
f28f9e44 | 66 | #include "agent-thread.h" |
2f77fc4b DG |
67 | |
68 | #include "cmd.h" | |
69 | ||
a503e1ef JG |
70 | /* Sleep for 100ms between each check for the shm path's deletion. */ |
71 | #define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000 | |
72 | ||
3e3665b8 JG |
73 | struct cmd_destroy_session_reply_context { |
74 | int reply_sock_fd; | |
75 | bool implicit_rotation_on_destroy; | |
3285a971 JG |
76 | /* |
77 | * Indicates whether or not an error occurred while launching the | |
78 | * destruction of a session. | |
79 | */ | |
80 | enum lttng_error_code destruction_status; | |
3e3665b8 JG |
81 | }; |
82 | ||
a503e1ef JG |
83 | static enum lttng_error_code wait_on_path(void *path); |
84 | ||
85 | /* | |
86 | * Command completion handler that is used by the destroy command | |
87 | * when a session that has a non-default shm_path is being destroyed. | |
88 | * | |
89 | * See comment in cmd_destroy_session() for the rationale. | |
90 | */ | |
91 | static struct destroy_completion_handler { | |
92 | struct cmd_completion_handler handler; | |
93 | char shm_path[member_sizeof(struct ltt_session, shm_path)]; | |
94 | } destroy_completion_handler = { | |
95 | .handler = { | |
96 | .run = wait_on_path, | |
97 | .data = destroy_completion_handler.shm_path | |
98 | }, | |
99 | .shm_path = { 0 }, | |
100 | }; | |
101 | ||
102 | static struct cmd_completion_handler *current_completion_handler; | |
103 | ||
2f77fc4b DG |
104 | /* |
105 | * Used to keep a unique index for each relayd socket created where this value | |
106 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
107 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
108 | * held. | |
2f77fc4b | 109 | */ |
d88aee68 DG |
110 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
111 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 112 | |
7076b56e JG |
113 | static int validate_ust_event_name(const char *); |
114 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 115 | const struct lttng_domain *domain, |
7076b56e JG |
116 | char *channel_name, struct lttng_event *event, |
117 | char *filter_expression, | |
118 | struct lttng_filter_bytecode *filter, | |
119 | struct lttng_event_exclusion *exclusion, | |
120 | int wpipe); | |
121 | ||
2f77fc4b DG |
122 | /* |
123 | * Create a session path used by list_lttng_sessions for the case that the | |
124 | * session consumer is on the network. | |
125 | */ | |
126 | static int build_network_session_path(char *dst, size_t size, | |
127 | struct ltt_session *session) | |
128 | { | |
129 | int ret, kdata_port, udata_port; | |
130 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
131 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
132 | ||
133 | assert(session); | |
134 | assert(dst); | |
135 | ||
136 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
137 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
138 | ||
139 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
140 | ||
141 | if (session->kernel_session && session->kernel_session->consumer) { | |
142 | kuri = &session->kernel_session->consumer->dst.net.control; | |
143 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
144 | } | |
145 | ||
146 | if (session->ust_session && session->ust_session->consumer) { | |
147 | uuri = &session->ust_session->consumer->dst.net.control; | |
148 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
149 | } | |
150 | ||
151 | if (uuri == NULL && kuri == NULL) { | |
152 | uri = &session->consumer->dst.net.control; | |
153 | kdata_port = session->consumer->dst.net.data.port; | |
154 | } else if (kuri && uuri) { | |
155 | ret = uri_compare(kuri, uuri); | |
156 | if (ret) { | |
157 | /* Not Equal */ | |
158 | uri = kuri; | |
159 | /* Build uuri URL string */ | |
160 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
161 | if (ret < 0) { | |
162 | goto error; | |
163 | } | |
164 | } else { | |
165 | uri = kuri; | |
166 | } | |
167 | } else if (kuri && uuri == NULL) { | |
168 | uri = kuri; | |
169 | } else if (uuri && kuri == NULL) { | |
170 | uri = uuri; | |
171 | } | |
172 | ||
173 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
174 | if (ret < 0) { | |
175 | goto error; | |
176 | } | |
177 | ||
9aa9f900 DG |
178 | /* |
179 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
180 | * to print. | |
181 | */ | |
9d035200 | 182 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
183 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
184 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
185 | } else { | |
9aa9f900 | 186 | int dport; |
bef08707 | 187 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
188 | dport = kdata_port; |
189 | } else { | |
190 | /* No kernel URI, use the UST port. */ | |
191 | dport = udata_port; | |
192 | } | |
193 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
194 | } |
195 | ||
196 | error: | |
197 | return ret; | |
198 | } | |
199 | ||
fb83fe64 JD |
200 | /* |
201 | * Get run-time attributes if the session has been started (discarded events, | |
202 | * lost packets). | |
203 | */ | |
204 | static int get_kernel_runtime_stats(struct ltt_session *session, | |
205 | struct ltt_kernel_channel *kchan, uint64_t *discarded_events, | |
206 | uint64_t *lost_packets) | |
207 | { | |
208 | int ret; | |
209 | ||
210 | if (!session->has_been_started) { | |
211 | ret = 0; | |
212 | *discarded_events = 0; | |
213 | *lost_packets = 0; | |
214 | goto end; | |
215 | } | |
216 | ||
e1f3997a | 217 | ret = consumer_get_discarded_events(session->id, kchan->key, |
fb83fe64 JD |
218 | session->kernel_session->consumer, |
219 | discarded_events); | |
220 | if (ret < 0) { | |
221 | goto end; | |
222 | } | |
223 | ||
e1f3997a | 224 | ret = consumer_get_lost_packets(session->id, kchan->key, |
fb83fe64 JD |
225 | session->kernel_session->consumer, |
226 | lost_packets); | |
227 | if (ret < 0) { | |
228 | goto end; | |
229 | } | |
230 | ||
231 | end: | |
232 | return ret; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Get run-time attributes if the session has been started (discarded events, | |
237 | * lost packets). | |
238 | */ | |
239 | static int get_ust_runtime_stats(struct ltt_session *session, | |
240 | struct ltt_ust_channel *uchan, uint64_t *discarded_events, | |
241 | uint64_t *lost_packets) | |
242 | { | |
243 | int ret; | |
244 | struct ltt_ust_session *usess; | |
245 | ||
a91c5803 JG |
246 | if (!discarded_events || !lost_packets) { |
247 | ret = -1; | |
248 | goto end; | |
249 | } | |
250 | ||
fb83fe64 | 251 | usess = session->ust_session; |
a905c624 JG |
252 | assert(discarded_events); |
253 | assert(lost_packets); | |
fb83fe64 JD |
254 | |
255 | if (!usess || !session->has_been_started) { | |
256 | *discarded_events = 0; | |
257 | *lost_packets = 0; | |
258 | ret = 0; | |
259 | goto end; | |
260 | } | |
261 | ||
262 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
263 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
264 | &usess->buffer_reg_uid_list, | |
265 | usess->consumer, uchan->id, | |
266 | uchan->attr.overwrite, | |
267 | discarded_events, | |
268 | lost_packets); | |
269 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { | |
270 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
271 | uchan, usess->consumer, | |
272 | uchan->attr.overwrite, | |
273 | discarded_events, | |
274 | lost_packets); | |
275 | if (ret < 0) { | |
276 | goto end; | |
277 | } | |
278 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
279 | *lost_packets += uchan->per_pid_closed_app_lost; | |
280 | } else { | |
281 | ERR("Unsupported buffer type"); | |
967bc289 | 282 | assert(0); |
fb83fe64 JD |
283 | ret = -1; |
284 | goto end; | |
285 | } | |
286 | ||
287 | end: | |
288 | return ret; | |
289 | } | |
290 | ||
2f77fc4b DG |
291 | /* |
292 | * Fill lttng_channel array of all channels. | |
293 | */ | |
d449df4a | 294 | static ssize_t list_lttng_channels(enum lttng_domain_type domain, |
fb83fe64 | 295 | struct ltt_session *session, struct lttng_channel *channels, |
cf0bcb51 | 296 | struct lttng_channel_extended *chan_exts) |
2f77fc4b | 297 | { |
d449df4a | 298 | int i = 0, ret = 0; |
2f77fc4b DG |
299 | struct ltt_kernel_channel *kchan; |
300 | ||
301 | DBG("Listing channels for session %s", session->name); | |
302 | ||
303 | switch (domain) { | |
304 | case LTTNG_DOMAIN_KERNEL: | |
305 | /* Kernel channels */ | |
306 | if (session->kernel_session != NULL) { | |
307 | cds_list_for_each_entry(kchan, | |
308 | &session->kernel_session->channel_list.head, list) { | |
fb83fe64 | 309 | uint64_t discarded_events, lost_packets; |
cf0bcb51 JG |
310 | struct lttng_channel_extended *extended; |
311 | ||
312 | extended = (struct lttng_channel_extended *) | |
313 | kchan->channel->attr.extended.ptr; | |
fb83fe64 JD |
314 | |
315 | ret = get_kernel_runtime_stats(session, kchan, | |
316 | &discarded_events, &lost_packets); | |
317 | if (ret < 0) { | |
318 | goto end; | |
319 | } | |
2f77fc4b DG |
320 | /* Copy lttng_channel struct to array */ |
321 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
322 | channels[i].enabled = kchan->enabled; | |
fb83fe64 JD |
323 | chan_exts[i].discarded_events = |
324 | discarded_events; | |
325 | chan_exts[i].lost_packets = lost_packets; | |
cf0bcb51 JG |
326 | chan_exts[i].monitor_timer_interval = |
327 | extended->monitor_timer_interval; | |
491d1539 | 328 | chan_exts[i].blocking_timeout = 0; |
2f77fc4b DG |
329 | i++; |
330 | } | |
331 | } | |
332 | break; | |
333 | case LTTNG_DOMAIN_UST: | |
334 | { | |
335 | struct lttng_ht_iter iter; | |
336 | struct ltt_ust_channel *uchan; | |
337 | ||
e7fe706f | 338 | rcu_read_lock(); |
2f77fc4b DG |
339 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
340 | &iter.iter, uchan, node.node) { | |
a91c5803 | 341 | uint64_t discarded_events = 0, lost_packets = 0; |
fb83fe64 | 342 | |
8ee609c8 MD |
343 | if (lttng_strncpy(channels[i].name, uchan->name, |
344 | LTTNG_SYMBOL_NAME_LEN)) { | |
345 | break; | |
346 | } | |
2f77fc4b DG |
347 | channels[i].attr.overwrite = uchan->attr.overwrite; |
348 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
349 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
350 | channels[i].attr.switch_timer_interval = | |
351 | uchan->attr.switch_timer_interval; | |
352 | channels[i].attr.read_timer_interval = | |
353 | uchan->attr.read_timer_interval; | |
354 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
355 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
356 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
5e4435a4 JG |
357 | |
358 | /* | |
359 | * Map enum lttng_ust_output to enum lttng_event_output. | |
360 | */ | |
2f77fc4b DG |
361 | switch (uchan->attr.output) { |
362 | case LTTNG_UST_MMAP: | |
2f77fc4b DG |
363 | channels[i].attr.output = LTTNG_EVENT_MMAP; |
364 | break; | |
5e4435a4 JG |
365 | default: |
366 | /* | |
367 | * LTTNG_UST_MMAP is the only supported UST | |
368 | * output mode. | |
369 | */ | |
370 | assert(0); | |
371 | break; | |
2f77fc4b | 372 | } |
fb83fe64 | 373 | |
d449df4a MD |
374 | chan_exts[i].monitor_timer_interval = |
375 | uchan->monitor_timer_interval; | |
491d1539 MD |
376 | chan_exts[i].blocking_timeout = |
377 | uchan->attr.u.s.blocking_timeout; | |
d449df4a | 378 | |
fb83fe64 JD |
379 | ret = get_ust_runtime_stats(session, uchan, |
380 | &discarded_events, &lost_packets); | |
381 | if (ret < 0) { | |
382 | break; | |
383 | } | |
384 | chan_exts[i].discarded_events = discarded_events; | |
385 | chan_exts[i].lost_packets = lost_packets; | |
2f77fc4b DG |
386 | i++; |
387 | } | |
e7fe706f | 388 | rcu_read_unlock(); |
2f77fc4b DG |
389 | break; |
390 | } | |
391 | default: | |
392 | break; | |
393 | } | |
fb83fe64 JD |
394 | |
395 | end: | |
d449df4a MD |
396 | if (ret < 0) { |
397 | return -LTTNG_ERR_FATAL; | |
398 | } else { | |
399 | return LTTNG_OK; | |
400 | } | |
2f77fc4b DG |
401 | } |
402 | ||
3c02e545 FD |
403 | static int increment_extended_len(const char *filter_expression, |
404 | struct lttng_event_exclusion *exclusion, | |
405 | const struct lttng_userspace_probe_location *probe_location, | |
406 | size_t *extended_len) | |
b4e3ceb9 | 407 | { |
3c02e545 FD |
408 | int ret = 0; |
409 | ||
b4e3ceb9 PP |
410 | *extended_len += sizeof(struct lttcomm_event_extended_header); |
411 | ||
412 | if (filter_expression) { | |
413 | *extended_len += strlen(filter_expression) + 1; | |
414 | } | |
795d57ce PP |
415 | |
416 | if (exclusion) { | |
417 | *extended_len += exclusion->count * LTTNG_SYMBOL_NAME_LEN; | |
418 | } | |
3c02e545 FD |
419 | |
420 | if (probe_location) { | |
421 | ret = lttng_userspace_probe_location_serialize(probe_location, | |
422 | NULL, NULL); | |
423 | if (ret < 0) { | |
424 | goto end; | |
425 | } | |
426 | *extended_len += ret; | |
427 | } | |
428 | ret = 0; | |
429 | end: | |
430 | return ret; | |
b4e3ceb9 PP |
431 | } |
432 | ||
3c02e545 FD |
433 | static int append_extended_info(const char *filter_expression, |
434 | struct lttng_event_exclusion *exclusion, | |
435 | struct lttng_userspace_probe_location *probe_location, | |
436 | void **extended_at) | |
b4e3ceb9 | 437 | { |
3c02e545 | 438 | int ret = 0; |
b4e3ceb9 | 439 | size_t filter_len = 0; |
795d57ce | 440 | size_t nb_exclusions = 0; |
3c02e545 FD |
441 | size_t userspace_probe_location_len = 0; |
442 | struct lttng_dynamic_buffer location_buffer; | |
443 | struct lttcomm_event_extended_header extended_header; | |
b4e3ceb9 PP |
444 | |
445 | if (filter_expression) { | |
446 | filter_len = strlen(filter_expression) + 1; | |
447 | } | |
448 | ||
795d57ce PP |
449 | if (exclusion) { |
450 | nb_exclusions = exclusion->count; | |
451 | } | |
452 | ||
3c02e545 FD |
453 | if (probe_location) { |
454 | lttng_dynamic_buffer_init(&location_buffer); | |
455 | ret = lttng_userspace_probe_location_serialize(probe_location, | |
456 | &location_buffer, NULL); | |
457 | if (ret < 0) { | |
458 | ret = -1; | |
459 | goto end; | |
460 | } | |
461 | userspace_probe_location_len = location_buffer.size; | |
462 | } | |
463 | ||
795d57ce | 464 | /* Set header fields */ |
b4e3ceb9 | 465 | extended_header.filter_len = filter_len; |
795d57ce | 466 | extended_header.nb_exclusions = nb_exclusions; |
3c02e545 | 467 | extended_header.userspace_probe_location_len = userspace_probe_location_len; |
795d57ce PP |
468 | |
469 | /* Copy header */ | |
b4e3ceb9 PP |
470 | memcpy(*extended_at, &extended_header, sizeof(extended_header)); |
471 | *extended_at += sizeof(extended_header); | |
795d57ce PP |
472 | |
473 | /* Copy filter string */ | |
474 | if (filter_expression) { | |
475 | memcpy(*extended_at, filter_expression, filter_len); | |
476 | *extended_at += filter_len; | |
477 | } | |
478 | ||
479 | /* Copy exclusion names */ | |
480 | if (exclusion) { | |
481 | size_t len = nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
482 | ||
483 | memcpy(*extended_at, &exclusion->names, len); | |
484 | *extended_at += len; | |
485 | } | |
3c02e545 FD |
486 | |
487 | if (probe_location) { | |
488 | memcpy(*extended_at, location_buffer.data, location_buffer.size); | |
489 | *extended_at += location_buffer.size; | |
490 | lttng_dynamic_buffer_reset(&location_buffer); | |
491 | } | |
492 | ret = 0; | |
493 | end: | |
494 | return ret; | |
b4e3ceb9 PP |
495 | } |
496 | ||
3c6a091f | 497 | /* |
022d91ba | 498 | * Create a list of agent domain events. |
3c6a091f DG |
499 | * |
500 | * Return number of events in list on success or else a negative value. | |
501 | */ | |
022d91ba | 502 | static int list_lttng_agent_events(struct agent *agt, |
b4e3ceb9 | 503 | struct lttng_event **events, size_t *total_size) |
3c6a091f DG |
504 | { |
505 | int i = 0, ret = 0; | |
506 | unsigned int nb_event = 0; | |
022d91ba | 507 | struct agent_event *event; |
47e52862 | 508 | struct lttng_event *tmp_events = NULL; |
3c6a091f | 509 | struct lttng_ht_iter iter; |
b4e3ceb9 PP |
510 | size_t extended_len = 0; |
511 | void *extended_at; | |
3c6a091f | 512 | |
022d91ba | 513 | assert(agt); |
3c6a091f DG |
514 | assert(events); |
515 | ||
022d91ba | 516 | DBG3("Listing agent events"); |
3c6a091f | 517 | |
e5bbf678 | 518 | rcu_read_lock(); |
022d91ba | 519 | nb_event = lttng_ht_get_count(agt->events); |
e5bbf678 | 520 | rcu_read_unlock(); |
3c6a091f DG |
521 | if (nb_event == 0) { |
522 | ret = nb_event; | |
b4e3ceb9 | 523 | *total_size = 0; |
3c6a091f DG |
524 | goto error; |
525 | } | |
526 | ||
b4e3ceb9 PP |
527 | /* Compute required extended infos size */ |
528 | extended_len = nb_event * sizeof(struct lttcomm_event_extended_header); | |
529 | ||
530 | /* | |
531 | * This is only valid because the commands which add events are | |
532 | * processed in the same thread as the listing. | |
533 | */ | |
534 | rcu_read_lock(); | |
535 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { | |
3c02e545 | 536 | ret = increment_extended_len(event->filter_expression, NULL, NULL, |
795d57ce | 537 | &extended_len); |
3c02e545 FD |
538 | if (ret) { |
539 | DBG("Error computing the length of extended info message"); | |
540 | ret = -LTTNG_ERR_FATAL; | |
541 | goto error; | |
542 | } | |
b4e3ceb9 PP |
543 | } |
544 | rcu_read_unlock(); | |
545 | ||
546 | *total_size = nb_event * sizeof(*tmp_events) + extended_len; | |
547 | tmp_events = zmalloc(*total_size); | |
3c6a091f | 548 | if (!tmp_events) { |
022d91ba | 549 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
550 | ret = -LTTNG_ERR_FATAL; |
551 | goto error; | |
552 | } | |
553 | ||
b4e3ceb9 PP |
554 | extended_at = ((uint8_t *) tmp_events) + |
555 | nb_event * sizeof(struct lttng_event); | |
556 | ||
3c6a091f | 557 | rcu_read_lock(); |
022d91ba | 558 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
559 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
560 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
561 | tmp_events[i].enabled = event->enabled; | |
2106efa0 | 562 | tmp_events[i].loglevel = event->loglevel_value; |
ff94328f | 563 | tmp_events[i].loglevel_type = event->loglevel_type; |
3c6a091f | 564 | i++; |
b4e3ceb9 PP |
565 | |
566 | /* Append extended info */ | |
3c02e545 | 567 | ret = append_extended_info(event->filter_expression, NULL, NULL, |
795d57ce | 568 | &extended_at); |
3c02e545 FD |
569 | if (ret) { |
570 | DBG("Error appending extended info message"); | |
571 | ret = -LTTNG_ERR_FATAL; | |
572 | goto error; | |
573 | } | |
3c6a091f | 574 | } |
3c6a091f DG |
575 | |
576 | *events = tmp_events; | |
577 | ret = nb_event; | |
3c02e545 | 578 | assert(nb_event == i); |
3c6a091f | 579 | |
47e52862 | 580 | end: |
3c02e545 | 581 | rcu_read_unlock(); |
3c6a091f | 582 | return ret; |
47e52862 JG |
583 | error: |
584 | free(tmp_events); | |
585 | goto end; | |
3c6a091f DG |
586 | } |
587 | ||
2f77fc4b DG |
588 | /* |
589 | * Create a list of ust global domain events. | |
590 | */ | |
591 | static int list_lttng_ust_global_events(char *channel_name, | |
b4e3ceb9 PP |
592 | struct ltt_ust_domain_global *ust_global, |
593 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
594 | { |
595 | int i = 0, ret = 0; | |
596 | unsigned int nb_event = 0; | |
597 | struct lttng_ht_iter iter; | |
598 | struct lttng_ht_node_str *node; | |
599 | struct ltt_ust_channel *uchan; | |
600 | struct ltt_ust_event *uevent; | |
601 | struct lttng_event *tmp; | |
b4e3ceb9 PP |
602 | size_t extended_len = 0; |
603 | void *extended_at; | |
2f77fc4b DG |
604 | |
605 | DBG("Listing UST global events for channel %s", channel_name); | |
606 | ||
607 | rcu_read_lock(); | |
608 | ||
609 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
610 | node = lttng_ht_iter_get_node_str(&iter); | |
611 | if (node == NULL) { | |
f73fabfd | 612 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
d31d3e8c | 613 | goto end; |
2f77fc4b DG |
614 | } |
615 | ||
616 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
617 | ||
3c442be3 | 618 | nb_event = lttng_ht_get_count(uchan->events); |
2f77fc4b DG |
619 | if (nb_event == 0) { |
620 | ret = nb_event; | |
b4e3ceb9 | 621 | *total_size = 0; |
d31d3e8c | 622 | goto end; |
2f77fc4b DG |
623 | } |
624 | ||
625 | DBG3("Listing UST global %d events", nb_event); | |
626 | ||
b4e3ceb9 PP |
627 | /* Compute required extended infos size */ |
628 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
629 | if (uevent->internal) { | |
630 | nb_event--; | |
631 | continue; | |
632 | } | |
633 | ||
3c02e545 FD |
634 | ret = increment_extended_len(uevent->filter_expression, |
635 | uevent->exclusion, NULL, &extended_len); | |
636 | if (ret) { | |
637 | DBG("Error computing the length of extended info message"); | |
638 | ret = -LTTNG_ERR_FATAL; | |
639 | goto end; | |
640 | } | |
b4e3ceb9 | 641 | } |
d31d3e8c PP |
642 | if (nb_event == 0) { |
643 | /* All events are internal, skip. */ | |
644 | ret = 0; | |
645 | *total_size = 0; | |
646 | goto end; | |
647 | } | |
b4e3ceb9 PP |
648 | |
649 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
650 | tmp = zmalloc(*total_size); | |
2f77fc4b | 651 | if (tmp == NULL) { |
b12c38df JG |
652 | ret = -LTTNG_ERR_FATAL; |
653 | goto end; | |
2f77fc4b DG |
654 | } |
655 | ||
b4e3ceb9 PP |
656 | extended_at = ((uint8_t *) tmp) + nb_event * sizeof(struct lttng_event); |
657 | ||
2f77fc4b | 658 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
3c442be3 JG |
659 | if (uevent->internal) { |
660 | /* This event should remain hidden from clients */ | |
3c442be3 JG |
661 | continue; |
662 | } | |
2f77fc4b DG |
663 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
664 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
665 | tmp[i].enabled = uevent->enabled; | |
666 | ||
667 | switch (uevent->attr.instrumentation) { | |
668 | case LTTNG_UST_TRACEPOINT: | |
669 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
670 | break; | |
671 | case LTTNG_UST_PROBE: | |
672 | tmp[i].type = LTTNG_EVENT_PROBE; | |
673 | break; | |
674 | case LTTNG_UST_FUNCTION: | |
675 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
676 | break; | |
677 | } | |
678 | ||
679 | tmp[i].loglevel = uevent->attr.loglevel; | |
680 | switch (uevent->attr.loglevel_type) { | |
681 | case LTTNG_UST_LOGLEVEL_ALL: | |
682 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
683 | break; | |
684 | case LTTNG_UST_LOGLEVEL_RANGE: | |
685 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
686 | break; | |
687 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
688 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
689 | break; | |
690 | } | |
691 | if (uevent->filter) { | |
692 | tmp[i].filter = 1; | |
693 | } | |
4634f12e JI |
694 | if (uevent->exclusion) { |
695 | tmp[i].exclusion = 1; | |
696 | } | |
2f77fc4b | 697 | i++; |
b4e3ceb9 PP |
698 | |
699 | /* Append extended info */ | |
3c02e545 FD |
700 | ret = append_extended_info(uevent->filter_expression, |
701 | uevent->exclusion, NULL, &extended_at); | |
702 | if (ret) { | |
703 | DBG("Error appending extended info message"); | |
704 | ret = -LTTNG_ERR_FATAL; | |
705 | goto end; | |
706 | } | |
2f77fc4b DG |
707 | } |
708 | ||
709 | ret = nb_event; | |
710 | *events = tmp; | |
d31d3e8c | 711 | end: |
2f77fc4b DG |
712 | rcu_read_unlock(); |
713 | return ret; | |
714 | } | |
715 | ||
716 | /* | |
717 | * Fill lttng_event array of all kernel events in the channel. | |
718 | */ | |
719 | static int list_lttng_kernel_events(char *channel_name, | |
b4e3ceb9 PP |
720 | struct ltt_kernel_session *kernel_session, |
721 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
722 | { |
723 | int i = 0, ret; | |
724 | unsigned int nb_event; | |
725 | struct ltt_kernel_event *event; | |
726 | struct ltt_kernel_channel *kchan; | |
b4e3ceb9 PP |
727 | size_t extended_len = 0; |
728 | void *extended_at; | |
2f77fc4b DG |
729 | |
730 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
731 | if (kchan == NULL) { | |
f73fabfd | 732 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
733 | goto error; |
734 | } | |
735 | ||
736 | nb_event = kchan->event_count; | |
737 | ||
738 | DBG("Listing events for channel %s", kchan->channel->name); | |
739 | ||
740 | if (nb_event == 0) { | |
b4e3ceb9 | 741 | *total_size = 0; |
834978fd | 742 | *events = NULL; |
db906c12 | 743 | goto end; |
2f77fc4b DG |
744 | } |
745 | ||
b4e3ceb9 PP |
746 | /* Compute required extended infos size */ |
747 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { | |
3c02e545 FD |
748 | ret = increment_extended_len(event->filter_expression, NULL, |
749 | event->userspace_probe_location, | |
795d57ce | 750 | &extended_len); |
3c02e545 FD |
751 | if (ret) { |
752 | DBG("Error computing the length of extended info message"); | |
753 | ret = -LTTNG_ERR_FATAL; | |
754 | goto error; | |
755 | } | |
b4e3ceb9 PP |
756 | } |
757 | ||
758 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
759 | *events = zmalloc(*total_size); | |
2f77fc4b | 760 | if (*events == NULL) { |
3c02e545 | 761 | ret = -LTTNG_ERR_FATAL; |
2f77fc4b DG |
762 | goto error; |
763 | } | |
764 | ||
ab4aa612 | 765 | extended_at = ((void *) *events) + |
b4e3ceb9 PP |
766 | nb_event * sizeof(struct lttng_event); |
767 | ||
2f77fc4b DG |
768 | /* Kernel channels */ |
769 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
770 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
771 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
772 | (*events)[i].enabled = event->enabled; | |
00f992f2 JG |
773 | (*events)[i].filter = |
774 | (unsigned char) !!event->filter_expression; | |
2f77fc4b DG |
775 | |
776 | switch (event->event->instrumentation) { | |
777 | case LTTNG_KERNEL_TRACEPOINT: | |
778 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
779 | break; | |
2f77fc4b | 780 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
781 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
782 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
783 | sizeof(struct lttng_kernel_kprobe)); | |
784 | break; | |
785 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
786 | (*events)[i].type = LTTNG_EVENT_PROBE; |
787 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
788 | sizeof(struct lttng_kernel_kprobe)); | |
789 | break; | |
b955b4d4 FD |
790 | case LTTNG_KERNEL_UPROBE: |
791 | (*events)[i].type = LTTNG_EVENT_USERSPACE_PROBE; | |
792 | break; | |
2f77fc4b DG |
793 | case LTTNG_KERNEL_FUNCTION: |
794 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
795 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
796 | sizeof(struct lttng_kernel_function)); | |
797 | break; | |
798 | case LTTNG_KERNEL_NOOP: | |
799 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
800 | break; | |
801 | case LTTNG_KERNEL_SYSCALL: | |
802 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
803 | break; | |
804 | case LTTNG_KERNEL_ALL: | |
1ab8c2ad FD |
805 | /* fall-through. */ |
806 | default: | |
2f77fc4b DG |
807 | assert(0); |
808 | break; | |
809 | } | |
810 | i++; | |
b4e3ceb9 PP |
811 | |
812 | /* Append extended info */ | |
3c02e545 FD |
813 | ret = append_extended_info(event->filter_expression, NULL, |
814 | event->userspace_probe_location, &extended_at); | |
815 | if (ret) { | |
816 | DBG("Error appending extended info message"); | |
817 | ret = -LTTNG_ERR_FATAL; | |
818 | goto error; | |
819 | } | |
2f77fc4b DG |
820 | } |
821 | ||
db906c12 | 822 | end: |
2f77fc4b DG |
823 | return nb_event; |
824 | ||
825 | error: | |
f73fabfd DG |
826 | /* Negate the error code to differentiate the size from an error */ |
827 | return -ret; | |
2f77fc4b DG |
828 | } |
829 | ||
830 | /* | |
831 | * Add URI so the consumer output object. Set the correct path depending on the | |
832 | * domain adding the default trace directory. | |
833 | */ | |
b178f53e JG |
834 | static enum lttng_error_code add_uri_to_consumer( |
835 | const struct ltt_session *session, | |
836 | struct consumer_output *consumer, | |
837 | struct lttng_uri *uri, enum lttng_domain_type domain) | |
2f77fc4b | 838 | { |
b178f53e JG |
839 | int ret; |
840 | enum lttng_error_code ret_code = LTTNG_OK; | |
2f77fc4b DG |
841 | |
842 | assert(uri); | |
843 | ||
844 | if (consumer == NULL) { | |
845 | DBG("No consumer detected. Don't add URI. Stopping."); | |
b178f53e | 846 | ret_code = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
847 | goto error; |
848 | } | |
849 | ||
850 | switch (domain) { | |
851 | case LTTNG_DOMAIN_KERNEL: | |
b178f53e JG |
852 | ret = lttng_strncpy(consumer->domain_subdir, |
853 | DEFAULT_KERNEL_TRACE_DIR, | |
854 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
855 | break; |
856 | case LTTNG_DOMAIN_UST: | |
b178f53e JG |
857 | ret = lttng_strncpy(consumer->domain_subdir, |
858 | DEFAULT_UST_TRACE_DIR, | |
859 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
860 | break; |
861 | default: | |
862 | /* | |
b178f53e JG |
863 | * This case is possible is we try to add the URI to the global |
864 | * tracing session consumer object which in this case there is | |
865 | * no subdir. | |
2f77fc4b | 866 | */ |
b178f53e JG |
867 | memset(consumer->domain_subdir, 0, |
868 | sizeof(consumer->domain_subdir)); | |
869 | ret = 0; | |
870 | } | |
871 | if (ret) { | |
872 | ERR("Failed to initialize consumer output domain subdirectory"); | |
873 | ret_code = LTTNG_ERR_FATAL; | |
874 | goto error; | |
2f77fc4b DG |
875 | } |
876 | ||
877 | switch (uri->dtype) { | |
878 | case LTTNG_DST_IPV4: | |
879 | case LTTNG_DST_IPV6: | |
880 | DBG2("Setting network URI to consumer"); | |
881 | ||
df75acac DG |
882 | if (consumer->type == CONSUMER_DST_NET) { |
883 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
884 | consumer->dst.net.control_isset) || |
885 | (uri->stype == LTTNG_STREAM_DATA && | |
886 | consumer->dst.net.data_isset)) { | |
b178f53e | 887 | ret_code = LTTNG_ERR_URL_EXIST; |
df75acac DG |
888 | goto error; |
889 | } | |
890 | } else { | |
b178f53e | 891 | memset(&consumer->dst, 0, sizeof(consumer->dst)); |
785d2d0d DG |
892 | } |
893 | ||
2f77fc4b | 894 | /* Set URI into consumer output object */ |
b178f53e | 895 | ret = consumer_set_network_uri(session, consumer, uri); |
2f77fc4b | 896 | if (ret < 0) { |
b178f53e | 897 | ret_code = -ret; |
2f77fc4b DG |
898 | goto error; |
899 | } else if (ret == 1) { | |
900 | /* | |
901 | * URI was the same in the consumer so we do not append the subdir | |
902 | * again so to not duplicate output dir. | |
903 | */ | |
b178f53e | 904 | ret_code = LTTNG_OK; |
2f77fc4b DG |
905 | goto error; |
906 | } | |
2f77fc4b DG |
907 | break; |
908 | case LTTNG_DST_PATH: | |
b178f53e JG |
909 | if (*uri->dst.path != '/' || strstr(uri->dst.path, "../")) { |
910 | ret_code = LTTNG_ERR_INVALID; | |
9ac05d92 MD |
911 | goto error; |
912 | } | |
b178f53e JG |
913 | DBG2("Setting trace directory path from URI to %s", |
914 | uri->dst.path); | |
915 | memset(&consumer->dst, 0, sizeof(consumer->dst)); | |
916 | ||
917 | ret = lttng_strncpy(consumer->dst.session_root_path, | |
918 | uri->dst.path, | |
919 | sizeof(consumer->dst.session_root_path)); | |
4df41cad JG |
920 | if (ret) { |
921 | ret_code = LTTNG_ERR_FATAL; | |
922 | goto error; | |
923 | } | |
2f77fc4b DG |
924 | consumer->type = CONSUMER_DST_LOCAL; |
925 | break; | |
926 | } | |
927 | ||
b178f53e | 928 | ret_code = LTTNG_OK; |
2f77fc4b | 929 | error: |
b178f53e | 930 | return ret_code; |
2f77fc4b DG |
931 | } |
932 | ||
933 | /* | |
934 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
935 | */ | |
936 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
937 | { | |
938 | int ret = 0; | |
939 | struct lttng_ht_iter iter; | |
940 | struct consumer_socket *socket; | |
941 | ||
942 | assert(session); | |
943 | ||
e7fe706f DG |
944 | rcu_read_lock(); |
945 | ||
2f77fc4b DG |
946 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
947 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
948 | socket, node.node) { | |
2f77fc4b | 949 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 950 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
951 | pthread_mutex_unlock(socket->lock); |
952 | if (ret < 0) { | |
f73fabfd | 953 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
954 | goto error; |
955 | } | |
956 | } | |
957 | } | |
958 | ||
959 | error: | |
e7fe706f | 960 | rcu_read_unlock(); |
2f77fc4b DG |
961 | return ret; |
962 | } | |
963 | ||
964 | /* | |
965 | * Create a socket to the relayd using the URI. | |
966 | * | |
967 | * On success, the relayd_sock pointer is set to the created socket. | |
9a654598 | 968 | * Else, it remains untouched and an LTTng error code is returned. |
2f77fc4b | 969 | */ |
9a654598 | 970 | static enum lttng_error_code create_connect_relayd(struct lttng_uri *uri, |
b31610f2 JD |
971 | struct lttcomm_relayd_sock **relayd_sock, |
972 | struct consumer_output *consumer) | |
2f77fc4b DG |
973 | { |
974 | int ret; | |
9a654598 | 975 | enum lttng_error_code status = LTTNG_OK; |
6151a90f | 976 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 977 | |
6151a90f JD |
978 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
979 | RELAYD_VERSION_COMM_MINOR); | |
980 | if (!rsock) { | |
9a654598 | 981 | status = LTTNG_ERR_FATAL; |
2f77fc4b DG |
982 | goto error; |
983 | } | |
984 | ||
ffe60014 DG |
985 | /* |
986 | * Connect to relayd so we can proceed with a session creation. This call | |
987 | * can possibly block for an arbitrary amount of time to set the health | |
988 | * state to be in poll execution. | |
989 | */ | |
990 | health_poll_entry(); | |
6151a90f | 991 | ret = relayd_connect(rsock); |
ffe60014 | 992 | health_poll_exit(); |
2f77fc4b DG |
993 | if (ret < 0) { |
994 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 995 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
996 | goto free_sock; |
997 | } | |
998 | ||
999 | /* Create socket for control stream. */ | |
1000 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
eacb7b6f MD |
1001 | uint64_t result_flags; |
1002 | ||
2f77fc4b DG |
1003 | DBG3("Creating relayd stream socket from URI"); |
1004 | ||
1005 | /* Check relayd version */ | |
6151a90f | 1006 | ret = relayd_version_check(rsock); |
67d5aa28 | 1007 | if (ret == LTTNG_ERR_RELAYD_VERSION_FAIL) { |
9a654598 | 1008 | status = LTTNG_ERR_RELAYD_VERSION_FAIL; |
67d5aa28 JD |
1009 | goto close_sock; |
1010 | } else if (ret < 0) { | |
1011 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 1012 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
1013 | goto close_sock; |
1014 | } | |
b31610f2 JD |
1015 | consumer->relay_major_version = rsock->major; |
1016 | consumer->relay_minor_version = rsock->minor; | |
eacb7b6f MD |
1017 | ret = relayd_get_configuration(rsock, 0, |
1018 | &result_flags); | |
1019 | if (ret < 0) { | |
1020 | ERR("Unable to get relayd configuration"); | |
1021 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; | |
1022 | goto close_sock; | |
1023 | } | |
1024 | if (result_flags & LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED) { | |
1025 | consumer->relay_allows_clear = true; | |
1026 | } | |
2f77fc4b DG |
1027 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
1028 | DBG3("Creating relayd data socket from URI"); | |
1029 | } else { | |
1030 | /* Command is not valid */ | |
1031 | ERR("Relayd invalid stream type: %d", uri->stype); | |
9a654598 | 1032 | status = LTTNG_ERR_INVALID; |
2f77fc4b DG |
1033 | goto close_sock; |
1034 | } | |
1035 | ||
6151a90f | 1036 | *relayd_sock = rsock; |
2f77fc4b | 1037 | |
9a654598 | 1038 | return status; |
2f77fc4b DG |
1039 | |
1040 | close_sock: | |
6151a90f JD |
1041 | /* The returned value is not useful since we are on an error path. */ |
1042 | (void) relayd_close(rsock); | |
2f77fc4b | 1043 | free_sock: |
6151a90f | 1044 | free(rsock); |
2f77fc4b | 1045 | error: |
9a654598 | 1046 | return status; |
2f77fc4b DG |
1047 | } |
1048 | ||
1049 | /* | |
1050 | * Connect to the relayd using URI and send the socket to the right consumer. | |
43fade62 JG |
1051 | * |
1052 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1053 | * |
1054 | * Returns LTTNG_OK on success or an LTTng error code on failure. | |
2f77fc4b | 1055 | */ |
9a654598 JG |
1056 | static enum lttng_error_code send_consumer_relayd_socket( |
1057 | unsigned int session_id, | |
3044f922 | 1058 | struct lttng_uri *relayd_uri, |
56a37563 | 1059 | struct consumer_output *consumer, |
d3e2ba59 | 1060 | struct consumer_socket *consumer_sock, |
fb9a95c4 | 1061 | const char *session_name, const char *hostname, |
6fa5fe7c | 1062 | const char *base_path, int session_live_timer, |
db1da059 | 1063 | const uint64_t *current_chunk_id, |
46ef2188 MD |
1064 | time_t session_creation_time, |
1065 | bool session_name_contains_creation_time) | |
2f77fc4b DG |
1066 | { |
1067 | int ret; | |
6151a90f | 1068 | struct lttcomm_relayd_sock *rsock = NULL; |
9a654598 | 1069 | enum lttng_error_code status; |
2f77fc4b | 1070 | |
ffe60014 | 1071 | /* Connect to relayd and make version check if uri is the control. */ |
9a654598 JG |
1072 | status = create_connect_relayd(relayd_uri, &rsock, consumer); |
1073 | if (status != LTTNG_OK) { | |
9e218353 | 1074 | goto relayd_comm_error; |
ffe60014 | 1075 | } |
6151a90f | 1076 | assert(rsock); |
ffe60014 | 1077 | |
2f77fc4b | 1078 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
1079 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
1080 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
1081 | /* |
1082 | * Increment net_seq_idx because we are about to transfer the | |
1083 | * new relayd socket to the consumer. | |
d88aee68 | 1084 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 1085 | */ |
d88aee68 DG |
1086 | consumer->net_seq_index = ++relayd_net_seq_idx; |
1087 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
1088 | } |
1089 | ||
2f77fc4b | 1090 | /* Send relayd socket to consumer. */ |
6151a90f | 1091 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 | 1092 | relayd_uri->stype, session_id, |
6fa5fe7c MD |
1093 | session_name, hostname, base_path, |
1094 | session_live_timer, current_chunk_id, | |
46ef2188 | 1095 | session_creation_time, session_name_contains_creation_time); |
2f77fc4b | 1096 | if (ret < 0) { |
9a654598 | 1097 | status = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
1098 | goto close_sock; |
1099 | } | |
1100 | ||
c890b720 DG |
1101 | /* Flag that the corresponding socket was sent. */ |
1102 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 1103 | consumer_sock->control_sock_sent = 1; |
c890b720 | 1104 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 1105 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
1106 | } |
1107 | ||
2f77fc4b DG |
1108 | /* |
1109 | * Close socket which was dup on the consumer side. The session daemon does | |
1110 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
1111 | */ | |
1112 | ||
1113 | close_sock: | |
9a654598 | 1114 | if (status != LTTNG_OK) { |
ffe60014 | 1115 | /* |
d9078d0c DG |
1116 | * The consumer output for this session should not be used anymore |
1117 | * since the relayd connection failed thus making any tracing or/and | |
1118 | * streaming not usable. | |
ffe60014 | 1119 | */ |
d9078d0c | 1120 | consumer->enabled = 0; |
ffe60014 | 1121 | } |
9e218353 JR |
1122 | (void) relayd_close(rsock); |
1123 | free(rsock); | |
1124 | ||
1125 | relayd_comm_error: | |
9a654598 | 1126 | return status; |
2f77fc4b DG |
1127 | } |
1128 | ||
1129 | /* | |
1130 | * Send both relayd sockets to a specific consumer and domain. This is a | |
1131 | * helper function to facilitate sending the information to the consumer for a | |
1132 | * session. | |
43fade62 JG |
1133 | * |
1134 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1135 | * |
1136 | * Returns LTTNG_OK, or an LTTng error code on failure. | |
2f77fc4b | 1137 | */ |
9a654598 JG |
1138 | static enum lttng_error_code send_consumer_relayd_sockets( |
1139 | enum lttng_domain_type domain, | |
56a37563 | 1140 | unsigned int session_id, struct consumer_output *consumer, |
fb9a95c4 | 1141 | struct consumer_socket *sock, const char *session_name, |
6fa5fe7c | 1142 | const char *hostname, const char *base_path, int session_live_timer, |
46ef2188 MD |
1143 | const uint64_t *current_chunk_id, time_t session_creation_time, |
1144 | bool session_name_contains_creation_time) | |
2f77fc4b | 1145 | { |
9a654598 | 1146 | enum lttng_error_code status = LTTNG_OK; |
2f77fc4b | 1147 | |
2f77fc4b | 1148 | assert(consumer); |
6dc3064a | 1149 | assert(sock); |
2f77fc4b | 1150 | |
2f77fc4b | 1151 | /* Sending control relayd socket. */ |
ffe60014 | 1152 | if (!sock->control_sock_sent) { |
9a654598 | 1153 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1154 | &consumer->dst.net.control, consumer, sock, |
6fa5fe7c | 1155 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1156 | current_chunk_id, session_creation_time, |
1157 | session_name_contains_creation_time); | |
9a654598 | 1158 | if (status != LTTNG_OK) { |
c890b720 DG |
1159 | goto error; |
1160 | } | |
2f77fc4b DG |
1161 | } |
1162 | ||
1163 | /* Sending data relayd socket. */ | |
ffe60014 | 1164 | if (!sock->data_sock_sent) { |
9a654598 | 1165 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1166 | &consumer->dst.net.data, consumer, sock, |
6fa5fe7c | 1167 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1168 | current_chunk_id, session_creation_time, |
1169 | session_name_contains_creation_time); | |
9a654598 | 1170 | if (status != LTTNG_OK) { |
c890b720 DG |
1171 | goto error; |
1172 | } | |
2f77fc4b DG |
1173 | } |
1174 | ||
2f77fc4b | 1175 | error: |
9a654598 | 1176 | return status; |
2f77fc4b DG |
1177 | } |
1178 | ||
1179 | /* | |
1180 | * Setup relayd connections for a tracing session. First creates the socket to | |
1181 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
1182 | * network. | |
1183 | */ | |
ffe60014 | 1184 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 1185 | { |
f73fabfd | 1186 | int ret = LTTNG_OK; |
2f77fc4b DG |
1187 | struct ltt_ust_session *usess; |
1188 | struct ltt_kernel_session *ksess; | |
1189 | struct consumer_socket *socket; | |
1190 | struct lttng_ht_iter iter; | |
1e791a74 | 1191 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
2f77fc4b | 1192 | |
1e791a74 | 1193 | assert(session); |
2f77fc4b DG |
1194 | |
1195 | usess = session->ust_session; | |
1196 | ksess = session->kernel_session; | |
1197 | ||
785d2d0d | 1198 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1199 | |
aa997ea3 | 1200 | rcu_read_lock(); |
1e791a74 JG |
1201 | if (session->current_trace_chunk) { |
1202 | enum lttng_trace_chunk_status status = lttng_trace_chunk_get_id( | |
1203 | session->current_trace_chunk, ¤t_chunk_id.value); | |
1204 | ||
1205 | if (status == LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1206 | current_chunk_id.is_set = true; | |
1207 | } else { | |
1208 | ERR("Failed to get current trace chunk id"); | |
1209 | ret = LTTNG_ERR_UNK; | |
1210 | goto error; | |
1211 | } | |
1212 | } | |
1213 | ||
2f77fc4b DG |
1214 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
1215 | && usess->consumer->enabled) { | |
1216 | /* For each consumer socket, send relayd sockets */ | |
1217 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
1218 | socket, node.node) { | |
2f77fc4b | 1219 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1220 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
1221 | usess->consumer, socket, |
1222 | session->name, session->hostname, | |
6fa5fe7c | 1223 | session->base_path, |
1e791a74 | 1224 | session->live_timer, |
db1da059 | 1225 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1226 | session->creation_time, |
1227 | session->name_contains_creation_time); | |
2f77fc4b | 1228 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1229 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1230 | goto error; |
1231 | } | |
6dc3064a DG |
1232 | /* Session is now ready for network streaming. */ |
1233 | session->net_handle = 1; | |
2f77fc4b | 1234 | } |
b31610f2 JD |
1235 | session->consumer->relay_major_version = |
1236 | usess->consumer->relay_major_version; | |
1237 | session->consumer->relay_minor_version = | |
1238 | usess->consumer->relay_minor_version; | |
eacb7b6f MD |
1239 | session->consumer->relay_allows_clear = |
1240 | usess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1241 | } |
1242 | ||
1243 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
1244 | && ksess->consumer->enabled) { | |
1245 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
1246 | socket, node.node) { | |
2f77fc4b | 1247 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1248 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
1249 | ksess->consumer, socket, |
1250 | session->name, session->hostname, | |
6fa5fe7c | 1251 | session->base_path, |
1e791a74 | 1252 | session->live_timer, |
db1da059 | 1253 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1254 | session->creation_time, |
1255 | session->name_contains_creation_time); | |
2f77fc4b | 1256 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1257 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1258 | goto error; |
1259 | } | |
6dc3064a DG |
1260 | /* Session is now ready for network streaming. */ |
1261 | session->net_handle = 1; | |
2f77fc4b | 1262 | } |
b31610f2 JD |
1263 | session->consumer->relay_major_version = |
1264 | ksess->consumer->relay_major_version; | |
1265 | session->consumer->relay_minor_version = | |
1266 | ksess->consumer->relay_minor_version; | |
eacb7b6f MD |
1267 | session->consumer->relay_allows_clear = |
1268 | ksess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1269 | } |
1270 | ||
1271 | error: | |
e7fe706f | 1272 | rcu_read_unlock(); |
2f77fc4b DG |
1273 | return ret; |
1274 | } | |
1275 | ||
9b6c7ec5 DG |
1276 | /* |
1277 | * Start a kernel session by opening all necessary streams. | |
1278 | */ | |
4dbe1875 | 1279 | int start_kernel_session(struct ltt_kernel_session *ksess) |
9b6c7ec5 DG |
1280 | { |
1281 | int ret; | |
1282 | struct ltt_kernel_channel *kchan; | |
1283 | ||
1284 | /* Open kernel metadata */ | |
07b86b52 | 1285 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
1286 | ret = kernel_open_metadata(ksess); |
1287 | if (ret < 0) { | |
1288 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1289 | goto error; | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | /* Open kernel metadata stream */ | |
07b86b52 | 1294 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1295 | ret = kernel_open_metadata_stream(ksess); |
1296 | if (ret < 0) { | |
1297 | ERR("Kernel create metadata stream failed"); | |
1298 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1299 | goto error; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* For each channel */ | |
1304 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1305 | if (kchan->stream_count == 0) { | |
1306 | ret = kernel_open_channel_stream(kchan); | |
1307 | if (ret < 0) { | |
1308 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1309 | goto error; | |
1310 | } | |
1311 | /* Update the stream global counter */ | |
1312 | ksess->stream_count_global += ret; | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | /* Setup kernel consumer socket and send fds to it */ | |
1317 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1318 | if (ret != 0) { |
9b6c7ec5 DG |
1319 | ret = LTTNG_ERR_KERN_START_FAIL; |
1320 | goto error; | |
1321 | } | |
1322 | ||
1323 | /* This start the kernel tracing */ | |
1324 | ret = kernel_start_session(ksess); | |
1325 | if (ret < 0) { | |
1326 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1327 | goto error; | |
1328 | } | |
1329 | ||
1330 | /* Quiescent wait after starting trace */ | |
7d268848 | 1331 | kernel_wait_quiescent(); |
9b6c7ec5 | 1332 | |
14fb1ebe | 1333 | ksess->active = 1; |
9b6c7ec5 DG |
1334 | |
1335 | ret = LTTNG_OK; | |
1336 | ||
1337 | error: | |
1338 | return ret; | |
1339 | } | |
1340 | ||
4dbe1875 MD |
1341 | int stop_kernel_session(struct ltt_kernel_session *ksess) |
1342 | { | |
1343 | struct ltt_kernel_channel *kchan; | |
1344 | bool error_occurred = false; | |
1345 | int ret; | |
1346 | ||
1347 | if (!ksess || !ksess->active) { | |
1348 | return LTTNG_OK; | |
1349 | } | |
1350 | DBG("Stopping kernel tracing"); | |
1351 | ||
1352 | ret = kernel_stop_session(ksess); | |
1353 | if (ret < 0) { | |
1354 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1355 | goto error; | |
1356 | } | |
1357 | ||
1358 | kernel_wait_quiescent(); | |
1359 | ||
1360 | /* Flush metadata after stopping (if exists) */ | |
1361 | if (ksess->metadata_stream_fd >= 0) { | |
1362 | ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd); | |
1363 | if (ret < 0) { | |
1364 | ERR("Kernel metadata flush failed"); | |
1365 | error_occurred = true; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | /* Flush all buffers after stopping */ | |
1370 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1371 | ret = kernel_flush_buffer(kchan); | |
1372 | if (ret < 0) { | |
1373 | ERR("Kernel flush buffer error"); | |
1374 | error_occurred = true; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | ksess->active = 0; | |
1379 | if (error_occurred) { | |
1380 | ret = LTTNG_ERR_UNK; | |
1381 | } else { | |
1382 | ret = LTTNG_OK; | |
1383 | } | |
1384 | error: | |
1385 | return ret; | |
1386 | } | |
1387 | ||
2f77fc4b DG |
1388 | /* |
1389 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1390 | */ | |
56a37563 JG |
1391 | int cmd_disable_channel(struct ltt_session *session, |
1392 | enum lttng_domain_type domain, char *channel_name) | |
2f77fc4b DG |
1393 | { |
1394 | int ret; | |
1395 | struct ltt_ust_session *usess; | |
1396 | ||
1397 | usess = session->ust_session; | |
1398 | ||
2223c96f DG |
1399 | rcu_read_lock(); |
1400 | ||
2f77fc4b DG |
1401 | switch (domain) { |
1402 | case LTTNG_DOMAIN_KERNEL: | |
1403 | { | |
1404 | ret = channel_kernel_disable(session->kernel_session, | |
1405 | channel_name); | |
f73fabfd | 1406 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1407 | goto error; |
1408 | } | |
1409 | ||
7d268848 | 1410 | kernel_wait_quiescent(); |
2f77fc4b DG |
1411 | break; |
1412 | } | |
1413 | case LTTNG_DOMAIN_UST: | |
1414 | { | |
1415 | struct ltt_ust_channel *uchan; | |
1416 | struct lttng_ht *chan_ht; | |
1417 | ||
1418 | chan_ht = usess->domain_global.channels; | |
1419 | ||
1420 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
1421 | if (uchan == NULL) { | |
f73fabfd | 1422 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1423 | goto error; |
1424 | } | |
1425 | ||
7972aab2 | 1426 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1427 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1428 | goto error; |
1429 | } | |
1430 | break; | |
1431 | } | |
2f77fc4b | 1432 | default: |
f73fabfd | 1433 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1434 | goto error; |
1435 | } | |
1436 | ||
f73fabfd | 1437 | ret = LTTNG_OK; |
2f77fc4b DG |
1438 | |
1439 | error: | |
2223c96f | 1440 | rcu_read_unlock(); |
2f77fc4b DG |
1441 | return ret; |
1442 | } | |
1443 | ||
ccf10263 MD |
1444 | /* |
1445 | * Command LTTNG_TRACK_PID processed by the client thread. | |
a9ad0c8f MD |
1446 | * |
1447 | * Called with session lock held. | |
ccf10263 | 1448 | */ |
56a37563 JG |
1449 | int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain, |
1450 | int pid) | |
ccf10263 MD |
1451 | { |
1452 | int ret; | |
1453 | ||
1454 | rcu_read_lock(); | |
1455 | ||
1456 | switch (domain) { | |
1457 | case LTTNG_DOMAIN_KERNEL: | |
1458 | { | |
1459 | struct ltt_kernel_session *ksess; | |
1460 | ||
1461 | ksess = session->kernel_session; | |
1462 | ||
1463 | ret = kernel_track_pid(ksess, pid); | |
1464 | if (ret != LTTNG_OK) { | |
1465 | goto error; | |
1466 | } | |
1467 | ||
7d268848 | 1468 | kernel_wait_quiescent(); |
ccf10263 MD |
1469 | break; |
1470 | } | |
ccf10263 | 1471 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
1472 | { |
1473 | struct ltt_ust_session *usess; | |
1474 | ||
1475 | usess = session->ust_session; | |
1476 | ||
1477 | ret = trace_ust_track_pid(usess, pid); | |
1478 | if (ret != LTTNG_OK) { | |
1479 | goto error; | |
1480 | } | |
1481 | break; | |
1482 | } | |
ccf10263 MD |
1483 | default: |
1484 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1485 | goto error; | |
1486 | } | |
1487 | ||
1488 | ret = LTTNG_OK; | |
1489 | ||
1490 | error: | |
1491 | rcu_read_unlock(); | |
1492 | return ret; | |
1493 | } | |
1494 | ||
1495 | /* | |
1496 | * Command LTTNG_UNTRACK_PID processed by the client thread. | |
a9ad0c8f MD |
1497 | * |
1498 | * Called with session lock held. | |
ccf10263 | 1499 | */ |
56a37563 JG |
1500 | int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain, |
1501 | int pid) | |
ccf10263 MD |
1502 | { |
1503 | int ret; | |
1504 | ||
1505 | rcu_read_lock(); | |
1506 | ||
1507 | switch (domain) { | |
1508 | case LTTNG_DOMAIN_KERNEL: | |
1509 | { | |
1510 | struct ltt_kernel_session *ksess; | |
1511 | ||
1512 | ksess = session->kernel_session; | |
1513 | ||
1514 | ret = kernel_untrack_pid(ksess, pid); | |
1515 | if (ret != LTTNG_OK) { | |
1516 | goto error; | |
1517 | } | |
1518 | ||
7d268848 | 1519 | kernel_wait_quiescent(); |
ccf10263 MD |
1520 | break; |
1521 | } | |
ccf10263 | 1522 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
1523 | { |
1524 | struct ltt_ust_session *usess; | |
1525 | ||
1526 | usess = session->ust_session; | |
1527 | ||
1528 | ret = trace_ust_untrack_pid(usess, pid); | |
1529 | if (ret != LTTNG_OK) { | |
1530 | goto error; | |
1531 | } | |
1532 | break; | |
1533 | } | |
ccf10263 MD |
1534 | default: |
1535 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1536 | goto error; | |
1537 | } | |
1538 | ||
1539 | ret = LTTNG_OK; | |
1540 | ||
1541 | error: | |
1542 | rcu_read_unlock(); | |
1543 | return ret; | |
1544 | } | |
1545 | ||
2f77fc4b DG |
1546 | /* |
1547 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1548 | * | |
1549 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1550 | */ | |
1551 | int cmd_enable_channel(struct ltt_session *session, | |
df4f5a87 | 1552 | const struct lttng_domain *domain, const struct lttng_channel *_attr, int wpipe) |
2f77fc4b DG |
1553 | { |
1554 | int ret; | |
1555 | struct ltt_ust_session *usess = session->ust_session; | |
1556 | struct lttng_ht *chan_ht; | |
1f345e94 | 1557 | size_t len; |
df4f5a87 | 1558 | struct lttng_channel attr; |
2f77fc4b DG |
1559 | |
1560 | assert(session); | |
df4f5a87 | 1561 | assert(_attr); |
7972aab2 | 1562 | assert(domain); |
2f77fc4b | 1563 | |
df4f5a87 JG |
1564 | attr = *_attr; |
1565 | len = lttng_strnlen(attr.name, sizeof(attr.name)); | |
1f345e94 PP |
1566 | |
1567 | /* Validate channel name */ | |
df4f5a87 JG |
1568 | if (attr.name[0] == '.' || |
1569 | memchr(attr.name, '/', len) != NULL) { | |
1f345e94 PP |
1570 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; |
1571 | goto end; | |
1572 | } | |
1573 | ||
df4f5a87 | 1574 | DBG("Enabling channel %s for session %s", attr.name, session->name); |
2f77fc4b | 1575 | |
03b4fdcf DG |
1576 | rcu_read_lock(); |
1577 | ||
ecc48a90 JD |
1578 | /* |
1579 | * Don't try to enable a channel if the session has been started at | |
1580 | * some point in time before. The tracer does not allow it. | |
1581 | */ | |
8382cf6f | 1582 | if (session->has_been_started) { |
ecc48a90 JD |
1583 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1584 | goto error; | |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * If the session is a live session, remove the switch timer, the | |
1589 | * live timer does the same thing but sends also synchronisation | |
1590 | * beacons for inactive streams. | |
1591 | */ | |
1592 | if (session->live_timer > 0) { | |
df4f5a87 JG |
1593 | attr.attr.live_timer_interval = session->live_timer; |
1594 | attr.attr.switch_timer_interval = 0; | |
ecc48a90 JD |
1595 | } |
1596 | ||
6e21424e JR |
1597 | /* Check for feature support */ |
1598 | switch (domain->type) { | |
1599 | case LTTNG_DOMAIN_KERNEL: | |
1600 | { | |
7d268848 | 1601 | if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) { |
6e21424e JR |
1602 | /* Sampling position of buffer is not supported */ |
1603 | WARN("Kernel tracer does not support buffer monitoring. " | |
1604 | "Setting the monitor interval timer to 0 " | |
1605 | "(disabled) for channel '%s' of session '%s'", | |
df4f5a87 JG |
1606 | attr.name, session->name); |
1607 | lttng_channel_set_monitor_timer_interval(&attr, 0); | |
6e21424e JR |
1608 | } |
1609 | break; | |
1610 | } | |
1611 | case LTTNG_DOMAIN_UST: | |
f28f9e44 | 1612 | break; |
6e21424e JR |
1613 | case LTTNG_DOMAIN_JUL: |
1614 | case LTTNG_DOMAIN_LOG4J: | |
1615 | case LTTNG_DOMAIN_PYTHON: | |
f28f9e44 JG |
1616 | if (!agent_tracing_is_enabled()) { |
1617 | DBG("Attempted to enable a channel in an agent domain but the agent thread is not running"); | |
1618 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
1619 | goto error; | |
1620 | } | |
6e21424e JR |
1621 | break; |
1622 | default: | |
1623 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1624 | goto error; | |
1625 | } | |
1626 | ||
7972aab2 | 1627 | switch (domain->type) { |
2f77fc4b DG |
1628 | case LTTNG_DOMAIN_KERNEL: |
1629 | { | |
1630 | struct ltt_kernel_channel *kchan; | |
1631 | ||
df4f5a87 | 1632 | kchan = trace_kernel_get_channel_by_name(attr.name, |
2f77fc4b DG |
1633 | session->kernel_session); |
1634 | if (kchan == NULL) { | |
54213acc JG |
1635 | if (session->snapshot.nb_output > 0 || |
1636 | session->snapshot_mode) { | |
1637 | /* Enforce mmap output for snapshot sessions. */ | |
df4f5a87 | 1638 | attr.attr.output = LTTNG_EVENT_MMAP; |
54213acc | 1639 | } |
df4f5a87 JG |
1640 | ret = channel_kernel_create(session->kernel_session, &attr, wpipe); |
1641 | if (attr.name[0] != '\0') { | |
85076754 MD |
1642 | session->kernel_session->has_non_default_channel = 1; |
1643 | } | |
2f77fc4b DG |
1644 | } else { |
1645 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1646 | } | |
1647 | ||
f73fabfd | 1648 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1649 | goto error; |
1650 | } | |
1651 | ||
7d268848 | 1652 | kernel_wait_quiescent(); |
2f77fc4b DG |
1653 | break; |
1654 | } | |
1655 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1656 | case LTTNG_DOMAIN_JUL: |
1657 | case LTTNG_DOMAIN_LOG4J: | |
1658 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1659 | { |
1660 | struct ltt_ust_channel *uchan; | |
1661 | ||
9232818f JG |
1662 | /* |
1663 | * FIXME | |
1664 | * | |
1665 | * Current agent implementation limitations force us to allow | |
1666 | * only one channel at once in "agent" subdomains. Each | |
1667 | * subdomain has a default channel name which must be strictly | |
1668 | * adhered to. | |
1669 | */ | |
1670 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
df4f5a87 | 1671 | if (strncmp(attr.name, DEFAULT_JUL_CHANNEL_NAME, |
9232818f JG |
1672 | LTTNG_SYMBOL_NAME_LEN)) { |
1673 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1674 | goto error; | |
1675 | } | |
1676 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
df4f5a87 | 1677 | if (strncmp(attr.name, DEFAULT_LOG4J_CHANNEL_NAME, |
9232818f JG |
1678 | LTTNG_SYMBOL_NAME_LEN)) { |
1679 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1680 | goto error; | |
1681 | } | |
1682 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
df4f5a87 | 1683 | if (strncmp(attr.name, DEFAULT_PYTHON_CHANNEL_NAME, |
9232818f JG |
1684 | LTTNG_SYMBOL_NAME_LEN)) { |
1685 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1686 | goto error; | |
1687 | } | |
1688 | } | |
1689 | ||
2f77fc4b DG |
1690 | chan_ht = usess->domain_global.channels; |
1691 | ||
df4f5a87 | 1692 | uchan = trace_ust_find_channel_by_name(chan_ht, attr.name); |
2f77fc4b | 1693 | if (uchan == NULL) { |
df4f5a87 JG |
1694 | ret = channel_ust_create(usess, &attr, domain->buf_type); |
1695 | if (attr.name[0] != '\0') { | |
85076754 MD |
1696 | usess->has_non_default_channel = 1; |
1697 | } | |
2f77fc4b | 1698 | } else { |
7972aab2 | 1699 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1700 | } |
1701 | break; | |
1702 | } | |
2f77fc4b | 1703 | default: |
f73fabfd | 1704 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1705 | goto error; |
1706 | } | |
1707 | ||
df4f5a87 | 1708 | if (ret == LTTNG_OK && attr.attr.output != LTTNG_EVENT_MMAP) { |
54213acc JG |
1709 | session->has_non_mmap_channel = true; |
1710 | } | |
2f77fc4b | 1711 | error: |
2223c96f | 1712 | rcu_read_unlock(); |
1f345e94 | 1713 | end: |
2f77fc4b DG |
1714 | return ret; |
1715 | } | |
1716 | ||
2f77fc4b DG |
1717 | /* |
1718 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1719 | */ | |
56a37563 | 1720 | int cmd_disable_event(struct ltt_session *session, |
df4f5a87 JG |
1721 | enum lttng_domain_type domain, const char *channel_name, |
1722 | const struct lttng_event *event) | |
2f77fc4b DG |
1723 | { |
1724 | int ret; | |
df4f5a87 | 1725 | const char *event_name; |
6e911cad | 1726 | |
18a720cd MD |
1727 | DBG("Disable event command for event \'%s\'", event->name); |
1728 | ||
6e911cad MD |
1729 | event_name = event->name; |
1730 | ||
9b7431cf JG |
1731 | /* Error out on unhandled search criteria */ |
1732 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad | 1733 | || event->pid || event->filter || event->exclusion) { |
7076b56e JG |
1734 | ret = LTTNG_ERR_UNK; |
1735 | goto error; | |
6e911cad | 1736 | } |
2f77fc4b | 1737 | |
2223c96f DG |
1738 | rcu_read_lock(); |
1739 | ||
2f77fc4b DG |
1740 | switch (domain) { |
1741 | case LTTNG_DOMAIN_KERNEL: | |
1742 | { | |
1743 | struct ltt_kernel_channel *kchan; | |
1744 | struct ltt_kernel_session *ksess; | |
1745 | ||
1746 | ksess = session->kernel_session; | |
1747 | ||
85076754 MD |
1748 | /* |
1749 | * If a non-default channel has been created in the | |
1750 | * session, explicitely require that -c chan_name needs | |
1751 | * to be provided. | |
1752 | */ | |
1753 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1754 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1755 | goto error_unlock; |
85076754 MD |
1756 | } |
1757 | ||
2f77fc4b DG |
1758 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1759 | if (kchan == NULL) { | |
f73fabfd | 1760 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1761 | goto error_unlock; |
2f77fc4b DG |
1762 | } |
1763 | ||
6e911cad MD |
1764 | switch (event->type) { |
1765 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1766 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1767 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1768 | case LTTNG_EVENT_PROBE: |
1769 | case LTTNG_EVENT_FUNCTION: | |
1770 | case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ | |
1771 | if (event_name[0] == '\0') { | |
1772 | ret = event_kernel_disable_event(kchan, | |
1773 | NULL, event->type); | |
29c62722 | 1774 | } else { |
d0ae4ea8 | 1775 | ret = event_kernel_disable_event(kchan, |
9550ee81 | 1776 | event_name, event->type); |
29c62722 | 1777 | } |
6e911cad | 1778 | if (ret != LTTNG_OK) { |
7076b56e | 1779 | goto error_unlock; |
6e911cad MD |
1780 | } |
1781 | break; | |
6e911cad MD |
1782 | default: |
1783 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1784 | goto error_unlock; |
2f77fc4b DG |
1785 | } |
1786 | ||
7d268848 | 1787 | kernel_wait_quiescent(); |
2f77fc4b DG |
1788 | break; |
1789 | } | |
1790 | case LTTNG_DOMAIN_UST: | |
1791 | { | |
1792 | struct ltt_ust_channel *uchan; | |
1793 | struct ltt_ust_session *usess; | |
1794 | ||
1795 | usess = session->ust_session; | |
1796 | ||
7076b56e JG |
1797 | if (validate_ust_event_name(event_name)) { |
1798 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1799 | goto error_unlock; | |
1800 | } | |
1801 | ||
85076754 MD |
1802 | /* |
1803 | * If a non-default channel has been created in the | |
9550ee81 | 1804 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1805 | * to be provided. |
1806 | */ | |
1807 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1808 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1809 | goto error_unlock; |
85076754 MD |
1810 | } |
1811 | ||
2f77fc4b DG |
1812 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1813 | channel_name); | |
1814 | if (uchan == NULL) { | |
f73fabfd | 1815 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1816 | goto error_unlock; |
2f77fc4b DG |
1817 | } |
1818 | ||
6e911cad MD |
1819 | switch (event->type) { |
1820 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1821 | /* |
1822 | * An empty event name means that everything | |
1823 | * should be disabled. | |
1824 | */ | |
1825 | if (event->name[0] == '\0') { | |
1826 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 JR |
1827 | } else { |
1828 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1829 | event_name); | |
1830 | } | |
6e911cad | 1831 | if (ret != LTTNG_OK) { |
7076b56e | 1832 | goto error_unlock; |
6e911cad MD |
1833 | } |
1834 | break; | |
1835 | default: | |
1836 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1837 | goto error_unlock; |
2f77fc4b DG |
1838 | } |
1839 | ||
1840 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1841 | channel_name); | |
1842 | break; | |
1843 | } | |
5cdb6027 | 1844 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1845 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1846 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1847 | { |
fefd409b | 1848 | struct agent *agt; |
f20baf8e DG |
1849 | struct ltt_ust_session *usess = session->ust_session; |
1850 | ||
1851 | assert(usess); | |
1852 | ||
6e911cad MD |
1853 | switch (event->type) { |
1854 | case LTTNG_EVENT_ALL: | |
1855 | break; | |
1856 | default: | |
1857 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1858 | goto error_unlock; |
6e911cad MD |
1859 | } |
1860 | ||
5cdb6027 | 1861 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1862 | if (!agt) { |
1863 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1864 | goto error_unlock; |
fefd409b | 1865 | } |
b3639870 JR |
1866 | /* |
1867 | * An empty event name means that everything | |
1868 | * should be disabled. | |
1869 | */ | |
1870 | if (event->name[0] == '\0') { | |
18a720cd MD |
1871 | ret = event_agent_disable_all(usess, agt); |
1872 | } else { | |
1873 | ret = event_agent_disable(usess, agt, event_name); | |
1874 | } | |
f20baf8e | 1875 | if (ret != LTTNG_OK) { |
7076b56e | 1876 | goto error_unlock; |
f20baf8e DG |
1877 | } |
1878 | ||
1879 | break; | |
1880 | } | |
2f77fc4b | 1881 | default: |
f73fabfd | 1882 | ret = LTTNG_ERR_UND; |
7076b56e | 1883 | goto error_unlock; |
2f77fc4b DG |
1884 | } |
1885 | ||
f73fabfd | 1886 | ret = LTTNG_OK; |
2f77fc4b | 1887 | |
7076b56e | 1888 | error_unlock: |
2223c96f | 1889 | rcu_read_unlock(); |
7076b56e | 1890 | error: |
2f77fc4b DG |
1891 | return ret; |
1892 | } | |
1893 | ||
2f77fc4b DG |
1894 | /* |
1895 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1896 | */ | |
56a37563 | 1897 | int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain, |
df4f5a87 | 1898 | char *channel_name, const struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1899 | { |
d5979e4a | 1900 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
bdf64013 JG |
1901 | char *app_ctx_provider_name = NULL, *app_ctx_name = NULL; |
1902 | ||
9a699f7b JR |
1903 | /* |
1904 | * Don't try to add a context if the session has been started at | |
1905 | * some point in time before. The tracer does not allow it and would | |
1906 | * result in a corrupted trace. | |
1907 | */ | |
1908 | if (session->has_been_started) { | |
1909 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
1910 | goto end; | |
1911 | } | |
1912 | ||
bdf64013 JG |
1913 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
1914 | app_ctx_provider_name = ctx->u.app_ctx.provider_name; | |
1915 | app_ctx_name = ctx->u.app_ctx.ctx_name; | |
1916 | } | |
2f77fc4b DG |
1917 | |
1918 | switch (domain) { | |
1919 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1920 | assert(session->kernel_session); |
1921 | ||
1922 | if (session->kernel_session->channel_count == 0) { | |
1923 | /* Create default channel */ | |
1924 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1925 | if (ret != LTTNG_OK) { | |
1926 | goto error; | |
1927 | } | |
d5979e4a | 1928 | chan_kern_created = 1; |
979e618e | 1929 | } |
2f77fc4b | 1930 | /* Add kernel context to kernel tracer */ |
601d5acf | 1931 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1932 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1933 | goto error; |
1934 | } | |
1935 | break; | |
bdf64013 JG |
1936 | case LTTNG_DOMAIN_JUL: |
1937 | case LTTNG_DOMAIN_LOG4J: | |
1938 | { | |
1939 | /* | |
1940 | * Validate channel name. | |
1941 | * If no channel name is given and the domain is JUL or LOG4J, | |
1942 | * set it to the appropriate domain-specific channel name. If | |
1943 | * a name is provided but does not match the expexted channel | |
1944 | * name, return an error. | |
1945 | */ | |
1946 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
1947 | strcmp(channel_name, | |
1948 | DEFAULT_JUL_CHANNEL_NAME)) { | |
1949 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1950 | goto error; | |
1951 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
1952 | strcmp(channel_name, | |
1953 | DEFAULT_LOG4J_CHANNEL_NAME)) { | |
1954 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1955 | goto error; | |
1956 | } | |
a93b3916 | 1957 | /* break is _not_ missing here. */ |
bdf64013 | 1958 | } |
2f77fc4b DG |
1959 | case LTTNG_DOMAIN_UST: |
1960 | { | |
1961 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1962 | unsigned int chan_count; |
1963 | ||
2f77fc4b DG |
1964 | assert(usess); |
1965 | ||
85076754 | 1966 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1967 | if (chan_count == 0) { |
1968 | struct lttng_channel *attr; | |
1969 | /* Create default channel */ | |
0a9c6494 | 1970 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1971 | if (attr == NULL) { |
1972 | ret = LTTNG_ERR_FATAL; | |
1973 | goto error; | |
1974 | } | |
1975 | ||
7972aab2 | 1976 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1977 | if (ret != LTTNG_OK) { |
1978 | free(attr); | |
1979 | goto error; | |
1980 | } | |
cf0bcb51 | 1981 | channel_attr_destroy(attr); |
d5979e4a | 1982 | chan_ust_created = 1; |
979e618e DG |
1983 | } |
1984 | ||
601d5acf | 1985 | ret = context_ust_add(usess, domain, ctx, channel_name); |
bdf64013 JG |
1986 | free(app_ctx_provider_name); |
1987 | free(app_ctx_name); | |
1988 | app_ctx_name = NULL; | |
1989 | app_ctx_provider_name = NULL; | |
f73fabfd | 1990 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1991 | goto error; |
1992 | } | |
1993 | break; | |
1994 | } | |
2f77fc4b | 1995 | default: |
f73fabfd | 1996 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1997 | goto error; |
1998 | } | |
1999 | ||
bdf64013 JG |
2000 | ret = LTTNG_OK; |
2001 | goto end; | |
2f77fc4b DG |
2002 | |
2003 | error: | |
d5979e4a DG |
2004 | if (chan_kern_created) { |
2005 | struct ltt_kernel_channel *kchan = | |
2006 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
2007 | session->kernel_session); | |
2008 | /* Created previously, this should NOT fail. */ | |
2009 | assert(kchan); | |
2010 | kernel_destroy_channel(kchan); | |
2011 | } | |
2012 | ||
2013 | if (chan_ust_created) { | |
2014 | struct ltt_ust_channel *uchan = | |
2015 | trace_ust_find_channel_by_name( | |
2016 | session->ust_session->domain_global.channels, | |
2017 | DEFAULT_CHANNEL_NAME); | |
2018 | /* Created previously, this should NOT fail. */ | |
2019 | assert(uchan); | |
2020 | /* Remove from the channel list of the session. */ | |
2021 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
2022 | uchan); | |
2023 | trace_ust_destroy_channel(uchan); | |
2024 | } | |
bdf64013 JG |
2025 | end: |
2026 | free(app_ctx_provider_name); | |
2027 | free(app_ctx_name); | |
2f77fc4b DG |
2028 | return ret; |
2029 | } | |
2030 | ||
dac8e046 JG |
2031 | static inline bool name_starts_with(const char *name, const char *prefix) |
2032 | { | |
2033 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
2034 | ||
2035 | return !strncmp(name, prefix, max_cmp_len); | |
2036 | } | |
2037 | ||
2038 | /* Perform userspace-specific event name validation */ | |
2039 | static int validate_ust_event_name(const char *name) | |
2040 | { | |
2041 | int ret = 0; | |
2042 | ||
2043 | if (!name) { | |
2044 | ret = -1; | |
2045 | goto end; | |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * Check name against all internal UST event component namespaces used | |
2050 | * by the agents. | |
2051 | */ | |
2052 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
2053 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
2054 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
2055 | ret = -1; | |
2056 | } | |
2057 | ||
2058 | end: | |
2059 | return ret; | |
2060 | } | |
88f06f15 | 2061 | |
2f77fc4b | 2062 | /* |
88f06f15 JG |
2063 | * Internal version of cmd_enable_event() with a supplemental |
2064 | * "internal_event" flag which is used to enable internal events which should | |
2065 | * be hidden from clients. Such events are used in the agent implementation to | |
2066 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 2067 | */ |
88f06f15 | 2068 | static int _cmd_enable_event(struct ltt_session *session, |
df4f5a87 | 2069 | const struct lttng_domain *domain, |
025faf73 | 2070 | char *channel_name, struct lttng_event *event, |
6b453b5e | 2071 | char *filter_expression, |
db8f1377 JI |
2072 | struct lttng_filter_bytecode *filter, |
2073 | struct lttng_event_exclusion *exclusion, | |
88f06f15 | 2074 | int wpipe, bool internal_event) |
2f77fc4b | 2075 | { |
9f449915 | 2076 | int ret = 0, channel_created = 0; |
cfedea03 | 2077 | struct lttng_channel *attr = NULL; |
2f77fc4b DG |
2078 | |
2079 | assert(session); | |
2080 | assert(event); | |
2081 | assert(channel_name); | |
2082 | ||
2a385866 JG |
2083 | /* If we have a filter, we must have its filter expression */ |
2084 | assert(!(!!filter_expression ^ !!filter)); | |
2085 | ||
9f449915 PP |
2086 | /* Normalize event name as a globbing pattern */ |
2087 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 2088 | |
9f449915 PP |
2089 | /* Normalize exclusion names as globbing patterns */ |
2090 | if (exclusion) { | |
2091 | size_t i; | |
f5ac4bd7 | 2092 | |
9f449915 PP |
2093 | for (i = 0; i < exclusion->count; i++) { |
2094 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
2095 | ||
2096 | strutils_normalize_star_glob_pattern(name); | |
2097 | } | |
930a2e99 JG |
2098 | } |
2099 | ||
9f449915 PP |
2100 | DBG("Enable event command for event \'%s\'", event->name); |
2101 | ||
2102 | rcu_read_lock(); | |
2103 | ||
7972aab2 | 2104 | switch (domain->type) { |
2f77fc4b DG |
2105 | case LTTNG_DOMAIN_KERNEL: |
2106 | { | |
2107 | struct ltt_kernel_channel *kchan; | |
2108 | ||
85076754 MD |
2109 | /* |
2110 | * If a non-default channel has been created in the | |
2111 | * session, explicitely require that -c chan_name needs | |
2112 | * to be provided. | |
2113 | */ | |
2114 | if (session->kernel_session->has_non_default_channel | |
2115 | && channel_name[0] == '\0') { | |
2116 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2117 | goto error; | |
2118 | } | |
2119 | ||
2f77fc4b DG |
2120 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2121 | session->kernel_session); | |
2122 | if (kchan == NULL) { | |
0a9c6494 DG |
2123 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
2124 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 2125 | if (attr == NULL) { |
f73fabfd | 2126 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2127 | goto error; |
2128 | } | |
04c17253 MD |
2129 | if (lttng_strncpy(attr->name, channel_name, |
2130 | sizeof(attr->name))) { | |
2131 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2132 | goto error; |
2133 | } | |
2f77fc4b DG |
2134 | |
2135 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2136 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2137 | goto error; |
2138 | } | |
e5f5db7f | 2139 | channel_created = 1; |
2f77fc4b DG |
2140 | } |
2141 | ||
2142 | /* Get the newly created kernel channel pointer */ | |
2143 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2144 | session->kernel_session); | |
2145 | if (kchan == NULL) { | |
2146 | /* This sould not happen... */ | |
f73fabfd | 2147 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2148 | goto error; |
2149 | } | |
2150 | ||
6e911cad MD |
2151 | switch (event->type) { |
2152 | case LTTNG_EVENT_ALL: | |
29c62722 | 2153 | { |
00a62084 MD |
2154 | char *filter_expression_a = NULL; |
2155 | struct lttng_filter_bytecode *filter_a = NULL; | |
2156 | ||
2157 | /* | |
2158 | * We need to duplicate filter_expression and filter, | |
2159 | * because ownership is passed to first enable | |
2160 | * event. | |
2161 | */ | |
2162 | if (filter_expression) { | |
2163 | filter_expression_a = strdup(filter_expression); | |
2164 | if (!filter_expression_a) { | |
2165 | ret = LTTNG_ERR_FATAL; | |
2166 | goto error; | |
2167 | } | |
2168 | } | |
2169 | if (filter) { | |
2170 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
2171 | if (!filter_a) { | |
2172 | free(filter_expression_a); | |
2173 | ret = LTTNG_ERR_FATAL; | |
2174 | goto error; | |
2175 | } | |
2176 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
2177 | } | |
29c62722 | 2178 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
2179 | ret = event_kernel_enable_event(kchan, event, |
2180 | filter_expression, filter); | |
a969e101 MD |
2181 | /* We have passed ownership */ |
2182 | filter_expression = NULL; | |
2183 | filter = NULL; | |
29c62722 MD |
2184 | if (ret != LTTNG_OK) { |
2185 | if (channel_created) { | |
2186 | /* Let's not leak a useless channel. */ | |
2187 | kernel_destroy_channel(kchan); | |
2188 | } | |
00a62084 MD |
2189 | free(filter_expression_a); |
2190 | free(filter_a); | |
29c62722 MD |
2191 | goto error; |
2192 | } | |
2193 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
2194 | ret = event_kernel_enable_event(kchan, event, |
2195 | filter_expression_a, filter_a); | |
60d21fa2 AB |
2196 | /* We have passed ownership */ |
2197 | filter_expression_a = NULL; | |
2198 | filter_a = NULL; | |
29c62722 MD |
2199 | if (ret != LTTNG_OK) { |
2200 | goto error; | |
2201 | } | |
2202 | break; | |
2203 | } | |
6e6ef3d7 | 2204 | case LTTNG_EVENT_PROBE: |
dcabc190 | 2205 | case LTTNG_EVENT_USERSPACE_PROBE: |
6e6ef3d7 DG |
2206 | case LTTNG_EVENT_FUNCTION: |
2207 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 2208 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
2209 | ret = event_kernel_enable_event(kchan, event, |
2210 | filter_expression, filter); | |
a969e101 MD |
2211 | /* We have passed ownership */ |
2212 | filter_expression = NULL; | |
2213 | filter = NULL; | |
6e911cad MD |
2214 | if (ret != LTTNG_OK) { |
2215 | if (channel_created) { | |
2216 | /* Let's not leak a useless channel. */ | |
2217 | kernel_destroy_channel(kchan); | |
2218 | } | |
2219 | goto error; | |
e5f5db7f | 2220 | } |
6e911cad MD |
2221 | break; |
2222 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
2223 | ret = event_kernel_enable_event(kchan, event, |
2224 | filter_expression, filter); | |
a969e101 MD |
2225 | /* We have passed ownership */ |
2226 | filter_expression = NULL; | |
2227 | filter = NULL; | |
e2b957af MD |
2228 | if (ret != LTTNG_OK) { |
2229 | goto error; | |
2230 | } | |
6e911cad MD |
2231 | break; |
2232 | default: | |
2233 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
2234 | goto error; |
2235 | } | |
2236 | ||
7d268848 | 2237 | kernel_wait_quiescent(); |
2f77fc4b DG |
2238 | break; |
2239 | } | |
2240 | case LTTNG_DOMAIN_UST: | |
2241 | { | |
2242 | struct ltt_ust_channel *uchan; | |
2243 | struct ltt_ust_session *usess = session->ust_session; | |
2244 | ||
2245 | assert(usess); | |
2246 | ||
85076754 MD |
2247 | /* |
2248 | * If a non-default channel has been created in the | |
2249 | * session, explicitely require that -c chan_name needs | |
2250 | * to be provided. | |
2251 | */ | |
2252 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
2253 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2254 | goto error; | |
2255 | } | |
2256 | ||
2f77fc4b DG |
2257 | /* Get channel from global UST domain */ |
2258 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2259 | channel_name); | |
2260 | if (uchan == NULL) { | |
2261 | /* Create default channel */ | |
0a9c6494 DG |
2262 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
2263 | usess->buffer_type); | |
2f77fc4b | 2264 | if (attr == NULL) { |
f73fabfd | 2265 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2266 | goto error; |
2267 | } | |
04c17253 MD |
2268 | if (lttng_strncpy(attr->name, channel_name, |
2269 | sizeof(attr->name))) { | |
2270 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2271 | goto error; |
2272 | } | |
2f77fc4b DG |
2273 | |
2274 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2275 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2276 | goto error; |
2277 | } | |
2f77fc4b DG |
2278 | |
2279 | /* Get the newly created channel reference back */ | |
2280 | uchan = trace_ust_find_channel_by_name( | |
2281 | usess->domain_global.channels, channel_name); | |
2282 | assert(uchan); | |
2283 | } | |
2284 | ||
141feb8c JG |
2285 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2286 | /* | |
2287 | * Don't allow users to add UST events to channels which | |
2288 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2289 | * Python, etc.). | |
2290 | */ | |
2291 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2292 | goto error; | |
2293 | } | |
2294 | ||
dac8e046 JG |
2295 | if (!internal_event) { |
2296 | /* | |
2297 | * Ensure the event name is not reserved for internal | |
2298 | * use. | |
2299 | */ | |
2300 | ret = validate_ust_event_name(event->name); | |
2301 | if (ret) { | |
2302 | WARN("Userspace event name %s failed validation.", | |
bbcab087 | 2303 | event->name); |
dac8e046 JG |
2304 | ret = LTTNG_ERR_INVALID_EVENT_NAME; |
2305 | goto error; | |
2306 | } | |
2307 | } | |
2308 | ||
2f77fc4b | 2309 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 2310 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
88f06f15 JG |
2311 | filter_expression, filter, exclusion, |
2312 | internal_event); | |
49d21f93 MD |
2313 | /* We have passed ownership */ |
2314 | filter_expression = NULL; | |
2315 | filter = NULL; | |
2316 | exclusion = NULL; | |
94382e15 JG |
2317 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2318 | goto already_enabled; | |
2319 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2320 | goto error; |
2321 | } | |
2322 | break; | |
2323 | } | |
5cdb6027 | 2324 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2325 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2326 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2327 | { |
da6c3a50 | 2328 | const char *default_event_name, *default_chan_name; |
fefd409b | 2329 | struct agent *agt; |
f20baf8e DG |
2330 | struct lttng_event uevent; |
2331 | struct lttng_domain tmp_dom; | |
2332 | struct ltt_ust_session *usess = session->ust_session; | |
2333 | ||
2334 | assert(usess); | |
2335 | ||
f28f9e44 JG |
2336 | if (!agent_tracing_is_enabled()) { |
2337 | DBG("Attempted to enable an event in an agent domain but the agent thread is not running"); | |
2338 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
2339 | goto error; | |
2340 | } | |
2341 | ||
5cdb6027 | 2342 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2343 | if (!agt) { |
5cdb6027 | 2344 | agt = agent_create(domain->type); |
fefd409b | 2345 | if (!agt) { |
e5b3c48c | 2346 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2347 | goto error; |
2348 | } | |
2349 | agent_add(agt, usess->agents); | |
2350 | } | |
2351 | ||
022d91ba | 2352 | /* Create the default tracepoint. */ |
996de3c7 | 2353 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2354 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2355 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
51755dc8 JG |
2356 | default_event_name = event_get_default_agent_ust_name( |
2357 | domain->type); | |
da6c3a50 | 2358 | if (!default_event_name) { |
e5b3c48c | 2359 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2360 | goto error; |
f43f95a9 | 2361 | } |
da6c3a50 | 2362 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2363 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2364 | ||
2365 | /* | |
2366 | * The domain type is changed because we are about to enable the | |
2367 | * default channel and event for the JUL domain that are hardcoded. | |
2368 | * This happens in the UST domain. | |
2369 | */ | |
2370 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2371 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2372 | ||
0e115563 DG |
2373 | switch (domain->type) { |
2374 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2375 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2376 | break; |
2377 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2378 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2379 | break; |
2380 | case LTTNG_DOMAIN_PYTHON: | |
2381 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2382 | break; | |
2383 | default: | |
e98a44b0 | 2384 | /* The switch/case we are in makes this impossible */ |
0e115563 | 2385 | assert(0); |
da6c3a50 DG |
2386 | } |
2387 | ||
971da06a | 2388 | { |
8404118c | 2389 | char *filter_expression_copy = NULL; |
51755dc8 | 2390 | struct lttng_filter_bytecode *filter_copy = NULL; |
971da06a JG |
2391 | |
2392 | if (filter) { | |
51755dc8 JG |
2393 | const size_t filter_size = sizeof( |
2394 | struct lttng_filter_bytecode) | |
2395 | + filter->len; | |
2396 | ||
2397 | filter_copy = zmalloc(filter_size); | |
971da06a | 2398 | if (!filter_copy) { |
018096a4 | 2399 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2400 | goto error; |
971da06a | 2401 | } |
51755dc8 | 2402 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2403 | |
8404118c JG |
2404 | filter_expression_copy = |
2405 | strdup(filter_expression); | |
2406 | if (!filter_expression) { | |
2407 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2408 | } |
2409 | ||
2410 | if (!filter_expression_copy || !filter_copy) { | |
2411 | free(filter_expression_copy); | |
2412 | free(filter_copy); | |
2413 | goto error; | |
8404118c | 2414 | } |
971da06a JG |
2415 | } |
2416 | ||
88f06f15 | 2417 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a | 2418 | (char *) default_chan_name, |
8404118c JG |
2419 | &uevent, filter_expression_copy, |
2420 | filter_copy, NULL, wpipe); | |
971da06a JG |
2421 | } |
2422 | ||
94382e15 JG |
2423 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2424 | goto already_enabled; | |
2425 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2426 | goto error; |
2427 | } | |
2428 | ||
2429 | /* The wild card * means that everything should be enabled. */ | |
2430 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8404118c JG |
2431 | ret = event_agent_enable_all(usess, agt, event, filter, |
2432 | filter_expression); | |
f20baf8e | 2433 | } else { |
8404118c JG |
2434 | ret = event_agent_enable(usess, agt, event, filter, |
2435 | filter_expression); | |
f20baf8e | 2436 | } |
51755dc8 JG |
2437 | filter = NULL; |
2438 | filter_expression = NULL; | |
f20baf8e DG |
2439 | if (ret != LTTNG_OK) { |
2440 | goto error; | |
2441 | } | |
2442 | ||
2443 | break; | |
2444 | } | |
2f77fc4b | 2445 | default: |
f73fabfd | 2446 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2447 | goto error; |
2448 | } | |
2449 | ||
f73fabfd | 2450 | ret = LTTNG_OK; |
2f77fc4b | 2451 | |
94382e15 | 2452 | already_enabled: |
2f77fc4b | 2453 | error: |
49d21f93 MD |
2454 | free(filter_expression); |
2455 | free(filter); | |
2456 | free(exclusion); | |
cf0bcb51 | 2457 | channel_attr_destroy(attr); |
2223c96f | 2458 | rcu_read_unlock(); |
2f77fc4b DG |
2459 | return ret; |
2460 | } | |
2461 | ||
88f06f15 JG |
2462 | /* |
2463 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2464 | * We own filter, exclusion, and filter_expression. | |
2465 | */ | |
df4f5a87 JG |
2466 | int cmd_enable_event(struct ltt_session *session, |
2467 | const struct lttng_domain *domain, | |
88f06f15 JG |
2468 | char *channel_name, struct lttng_event *event, |
2469 | char *filter_expression, | |
2470 | struct lttng_filter_bytecode *filter, | |
2471 | struct lttng_event_exclusion *exclusion, | |
2472 | int wpipe) | |
2473 | { | |
2474 | return _cmd_enable_event(session, domain, channel_name, event, | |
2475 | filter_expression, filter, exclusion, wpipe, false); | |
2476 | } | |
2477 | ||
2478 | /* | |
2479 | * Enable an event which is internal to LTTng. An internal should | |
2480 | * never be made visible to clients and are immune to checks such as | |
2481 | * reserved names. | |
2482 | */ | |
2483 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 2484 | const struct lttng_domain *domain, |
88f06f15 JG |
2485 | char *channel_name, struct lttng_event *event, |
2486 | char *filter_expression, | |
2487 | struct lttng_filter_bytecode *filter, | |
2488 | struct lttng_event_exclusion *exclusion, | |
2489 | int wpipe) | |
2490 | { | |
2491 | return _cmd_enable_event(session, domain, channel_name, event, | |
2492 | filter_expression, filter, exclusion, wpipe, true); | |
2493 | } | |
2494 | ||
2f77fc4b DG |
2495 | /* |
2496 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2497 | */ | |
56a37563 JG |
2498 | ssize_t cmd_list_tracepoints(enum lttng_domain_type domain, |
2499 | struct lttng_event **events) | |
2f77fc4b DG |
2500 | { |
2501 | int ret; | |
2502 | ssize_t nb_events = 0; | |
2503 | ||
2504 | switch (domain) { | |
2505 | case LTTNG_DOMAIN_KERNEL: | |
7d268848 | 2506 | nb_events = kernel_list_events(events); |
2f77fc4b | 2507 | if (nb_events < 0) { |
f73fabfd | 2508 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2509 | goto error; |
2510 | } | |
2511 | break; | |
2512 | case LTTNG_DOMAIN_UST: | |
2513 | nb_events = ust_app_list_events(events); | |
2514 | if (nb_events < 0) { | |
f73fabfd | 2515 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2516 | goto error; |
2517 | } | |
2518 | break; | |
5cdb6027 | 2519 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2520 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2521 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 2522 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
2523 | if (nb_events < 0) { |
2524 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2525 | goto error; | |
2526 | } | |
2527 | break; | |
2f77fc4b | 2528 | default: |
f73fabfd | 2529 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2530 | goto error; |
2531 | } | |
2532 | ||
2533 | return nb_events; | |
2534 | ||
2535 | error: | |
2536 | /* Return negative value to differentiate return code */ | |
2537 | return -ret; | |
2538 | } | |
2539 | ||
2540 | /* | |
2541 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2542 | */ | |
56a37563 | 2543 | ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
2f77fc4b DG |
2544 | struct lttng_event_field **fields) |
2545 | { | |
2546 | int ret; | |
2547 | ssize_t nb_fields = 0; | |
2548 | ||
2549 | switch (domain) { | |
2550 | case LTTNG_DOMAIN_UST: | |
2551 | nb_fields = ust_app_list_event_fields(fields); | |
2552 | if (nb_fields < 0) { | |
f73fabfd | 2553 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2554 | goto error; |
2555 | } | |
2556 | break; | |
2557 | case LTTNG_DOMAIN_KERNEL: | |
2558 | default: /* fall-through */ | |
f73fabfd | 2559 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2560 | goto error; |
2561 | } | |
2562 | ||
2563 | return nb_fields; | |
2564 | ||
2565 | error: | |
2566 | /* Return negative value to differentiate return code */ | |
2567 | return -ret; | |
2568 | } | |
2569 | ||
834978fd DG |
2570 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
2571 | { | |
2572 | return syscall_table_list(events); | |
2573 | } | |
2574 | ||
a5dfbb9d MD |
2575 | /* |
2576 | * Command LTTNG_LIST_TRACKER_PIDS processed by the client thread. | |
2577 | * | |
2578 | * Called with session lock held. | |
2579 | */ | |
2580 | ssize_t cmd_list_tracker_pids(struct ltt_session *session, | |
56a37563 | 2581 | enum lttng_domain_type domain, int32_t **pids) |
a5dfbb9d MD |
2582 | { |
2583 | int ret; | |
2584 | ssize_t nr_pids = 0; | |
2585 | ||
2586 | switch (domain) { | |
2587 | case LTTNG_DOMAIN_KERNEL: | |
2588 | { | |
2589 | struct ltt_kernel_session *ksess; | |
2590 | ||
2591 | ksess = session->kernel_session; | |
2592 | nr_pids = kernel_list_tracker_pids(ksess, pids); | |
2593 | if (nr_pids < 0) { | |
2594 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
2595 | goto error; | |
2596 | } | |
2597 | break; | |
2598 | } | |
2599 | case LTTNG_DOMAIN_UST: | |
2600 | { | |
2601 | struct ltt_ust_session *usess; | |
2602 | ||
2603 | usess = session->ust_session; | |
2604 | nr_pids = trace_ust_list_tracker_pids(usess, pids); | |
2605 | if (nr_pids < 0) { | |
2606 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2607 | goto error; | |
2608 | } | |
2609 | break; | |
2610 | } | |
2611 | case LTTNG_DOMAIN_LOG4J: | |
2612 | case LTTNG_DOMAIN_JUL: | |
2613 | case LTTNG_DOMAIN_PYTHON: | |
2614 | default: | |
2615 | ret = LTTNG_ERR_UND; | |
2616 | goto error; | |
2617 | } | |
2618 | ||
2619 | return nr_pids; | |
2620 | ||
2621 | error: | |
2622 | /* Return negative value to differentiate return code */ | |
2623 | return -ret; | |
2624 | } | |
2625 | ||
2f77fc4b DG |
2626 | /* |
2627 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2628 | * |
2629 | * Called with session mutex held. | |
2f77fc4b DG |
2630 | */ |
2631 | int cmd_start_trace(struct ltt_session *session) | |
2632 | { | |
82b69413 | 2633 | enum lttng_error_code ret; |
cde3e505 | 2634 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2635 | struct ltt_kernel_session *ksession; |
2636 | struct ltt_ust_session *usess; | |
1f496244 JG |
2637 | const bool session_rotated_after_last_stop = |
2638 | session->rotated_after_last_stop; | |
2f77fc4b DG |
2639 | |
2640 | assert(session); | |
2641 | ||
2642 | /* Ease our life a bit ;) */ | |
2643 | ksession = session->kernel_session; | |
2644 | usess = session->ust_session; | |
2645 | ||
8382cf6f DG |
2646 | /* Is the session already started? */ |
2647 | if (session->active) { | |
f73fabfd | 2648 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2649 | goto error; |
2650 | } | |
2651 | ||
1f496244 JG |
2652 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING && |
2653 | !session->current_trace_chunk) { | |
2654 | /* | |
2655 | * A rotation was launched while the session was stopped and | |
2656 | * it has not been completed yet. It is not possible to start | |
2657 | * the session since starting the session here would require a | |
2658 | * rotation from "NULL" to a new trace chunk. That rotation | |
2659 | * would overlap with the ongoing rotation, which is not | |
2660 | * supported. | |
2661 | */ | |
2662 | WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing", | |
2663 | session->name); | |
2664 | ret = LTTNG_ERR_ROTATION_PENDING; | |
2665 | goto error; | |
2666 | } | |
2667 | ||
cde3e505 DG |
2668 | /* |
2669 | * Starting a session without channel is useless since after that it's not | |
2670 | * possible to enable channel thus inform the client. | |
2671 | */ | |
2672 | if (usess && usess->domain_global.channels) { | |
2673 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2674 | } | |
2675 | if (ksession) { | |
2676 | nb_chan += ksession->channel_count; | |
2677 | } | |
2678 | if (!nb_chan) { | |
2679 | ret = LTTNG_ERR_NO_CHANNEL; | |
2680 | goto error; | |
2681 | } | |
2682 | ||
1f496244 JG |
2683 | session->active = 1; |
2684 | session->rotated_after_last_stop = false; | |
070b6a86 | 2685 | if (session->output_traces && !session->current_trace_chunk) { |
1f496244 JG |
2686 | if (!session->has_been_started) { |
2687 | struct lttng_trace_chunk *trace_chunk; | |
2688 | ||
2689 | DBG("Creating initial trace chunk of session \"%s\"", | |
2690 | session->name); | |
2691 | trace_chunk = session_create_new_trace_chunk( | |
2692 | session, NULL, NULL, NULL); | |
2693 | if (!trace_chunk) { | |
2694 | ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
2695 | goto error; | |
2696 | } | |
2697 | assert(!session->current_trace_chunk); | |
2698 | ret = session_set_trace_chunk(session, trace_chunk, | |
2699 | NULL); | |
2700 | lttng_trace_chunk_put(trace_chunk); | |
2701 | if (ret) { | |
2702 | ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
2703 | goto error; | |
2704 | } | |
2705 | } else { | |
2706 | DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk", | |
2707 | session->name); | |
2708 | /* | |
2709 | * Rotate existing streams into the new chunk. | |
2710 | * This is a "quiet" rotation has no client has | |
2711 | * explicitly requested this operation. | |
2712 | * | |
2713 | * There is also no need to wait for the rotation | |
2714 | * to complete as it will happen immediately. No data | |
2715 | * was produced as the session was stopped, so the | |
2716 | * rotation should happen on reception of the command. | |
2717 | */ | |
343defc2 MD |
2718 | ret = cmd_rotate_session(session, NULL, true, |
2719 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
1f496244 JG |
2720 | if (ret != LTTNG_OK) { |
2721 | goto error; | |
2722 | } | |
5c408ad8 | 2723 | } |
c996624c JD |
2724 | } |
2725 | ||
2f77fc4b DG |
2726 | /* Kernel tracing */ |
2727 | if (ksession != NULL) { | |
c996624c | 2728 | DBG("Start kernel tracing session %s", session->name); |
7d268848 | 2729 | ret = start_kernel_session(ksession); |
9b6c7ec5 | 2730 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2731 | goto error; |
2732 | } | |
2f77fc4b DG |
2733 | } |
2734 | ||
2735 | /* Flag session that trace should start automatically */ | |
2736 | if (usess) { | |
82b69413 JG |
2737 | int int_ret = ust_app_start_trace_all(usess); |
2738 | ||
2739 | if (int_ret < 0) { | |
f73fabfd | 2740 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2741 | goto error; |
2742 | } | |
2743 | } | |
2744 | ||
5c408ad8 JD |
2745 | /* |
2746 | * Clear the flag that indicates that a rotation was done while the | |
2747 | * session was stopped. | |
2748 | */ | |
2749 | session->rotated_after_last_stop = false; | |
2750 | ||
259c2674 | 2751 | if (session->rotate_timer_period) { |
82b69413 JG |
2752 | int int_ret = timer_session_rotation_schedule_timer_start( |
2753 | session, session->rotate_timer_period); | |
2754 | ||
2755 | if (int_ret < 0) { | |
259c2674 JD |
2756 | ERR("Failed to enable rotate timer"); |
2757 | ret = LTTNG_ERR_UNK; | |
2758 | goto error; | |
2759 | } | |
2760 | } | |
2761 | ||
f73fabfd | 2762 | ret = LTTNG_OK; |
2f77fc4b DG |
2763 | |
2764 | error: | |
1f496244 JG |
2765 | if (ret == LTTNG_OK) { |
2766 | /* Flag this after a successful start. */ | |
2767 | session->has_been_started |= 1; | |
2768 | } else { | |
2769 | session->active = 0; | |
2770 | /* Restore initial state on error. */ | |
2771 | session->rotated_after_last_stop = | |
2772 | session_rotated_after_last_stop; | |
2773 | } | |
2f77fc4b DG |
2774 | return ret; |
2775 | } | |
2776 | ||
2777 | /* | |
2778 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2779 | */ | |
2780 | int cmd_stop_trace(struct ltt_session *session) | |
2781 | { | |
2782 | int ret; | |
2f77fc4b DG |
2783 | struct ltt_kernel_session *ksession; |
2784 | struct ltt_ust_session *usess; | |
2785 | ||
2786 | assert(session); | |
2787 | ||
4dbe1875 | 2788 | DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
2f77fc4b DG |
2789 | /* Short cut */ |
2790 | ksession = session->kernel_session; | |
2791 | usess = session->ust_session; | |
2792 | ||
8382cf6f DG |
2793 | /* Session is not active. Skip everythong and inform the client. */ |
2794 | if (!session->active) { | |
f73fabfd | 2795 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2796 | goto error; |
2797 | } | |
2798 | ||
4dbe1875 MD |
2799 | ret = stop_kernel_session(ksession); |
2800 | if (ret != LTTNG_OK) { | |
2801 | goto error; | |
2f77fc4b DG |
2802 | } |
2803 | ||
14fb1ebe | 2804 | if (usess && usess->active) { |
2f77fc4b DG |
2805 | ret = ust_app_stop_trace_all(usess); |
2806 | if (ret < 0) { | |
f73fabfd | 2807 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2808 | goto error; |
2809 | } | |
2810 | } | |
2811 | ||
4dbe1875 MD |
2812 | DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name, |
2813 | session->id); | |
8382cf6f DG |
2814 | /* Flag inactive after a successful stop. */ |
2815 | session->active = 0; | |
4dbe1875 | 2816 | ret = LTTNG_OK; |
2f77fc4b DG |
2817 | |
2818 | error: | |
2819 | return ret; | |
2820 | } | |
2821 | ||
2822 | /* | |
433f5ba9 JR |
2823 | * Set the base_path of the session only if subdir of a control uris is set. |
2824 | * Return LTTNG_OK on success, otherwise LTTNG_ERR_*. | |
2f77fc4b | 2825 | */ |
433f5ba9 JR |
2826 | static int set_session_base_path_from_uris(struct ltt_session *session, |
2827 | size_t nb_uri, | |
bda32d56 | 2828 | struct lttng_uri *uris) |
2f77fc4b | 2829 | { |
433f5ba9 JR |
2830 | int ret; |
2831 | size_t i; | |
2f77fc4b | 2832 | |
e3876bf0 JR |
2833 | for (i = 0; i < nb_uri; i++) { |
2834 | if (uris[i].stype != LTTNG_STREAM_CONTROL || | |
2835 | uris[i].subdir[0] == '\0') { | |
2836 | /* Not interested in these URIs */ | |
2837 | continue; | |
2838 | } | |
2839 | ||
2840 | if (session->base_path != NULL) { | |
2841 | free(session->base_path); | |
2842 | session->base_path = NULL; | |
2843 | } | |
2844 | ||
2845 | /* Set session base_path */ | |
2846 | session->base_path = strdup(uris[i].subdir); | |
2847 | if (!session->base_path) { | |
433f5ba9 JR |
2848 | PERROR("Failed to copy base path \"%s\" to session \"%s\"", |
2849 | uris[i].subdir, session->name); | |
2850 | ret = LTTNG_ERR_NOMEM; | |
e3876bf0 JR |
2851 | goto error; |
2852 | } | |
433f5ba9 JR |
2853 | DBG2("Setting base path \"%s\" for session \"%s\"", |
2854 | session->base_path, session->name); | |
2855 | } | |
2856 | ret = LTTNG_OK; | |
2857 | error: | |
2858 | return ret; | |
2859 | } | |
2860 | ||
2861 | /* | |
2862 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2863 | */ | |
2864 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, | |
2865 | struct lttng_uri *uris) | |
2866 | { | |
2867 | int ret, i; | |
2868 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2869 | struct ltt_ust_session *usess = session->ust_session; | |
2870 | ||
2871 | assert(session); | |
2872 | assert(uris); | |
2873 | assert(nb_uri > 0); | |
2874 | ||
2875 | /* Can't set consumer URI if the session is active. */ | |
2876 | if (session->active) { | |
2877 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2878 | goto error; | |
2879 | } | |
2880 | ||
2881 | /* | |
2882 | * Set the session base path if any. This is done inside | |
2883 | * cmd_set_consumer_uri to preserve backward compatibility of the | |
2884 | * previous session creation api vs the session descriptor api. | |
2885 | */ | |
2886 | ret = set_session_base_path_from_uris(session, nb_uri, uris); | |
2887 | if (ret != LTTNG_OK) { | |
2888 | goto error; | |
e3876bf0 JR |
2889 | } |
2890 | ||
bda32d56 | 2891 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2892 | for (i = 0; i < nb_uri; i++) { |
e3876bf0 JR |
2893 | ret = add_uri_to_consumer(session, session->consumer, &uris[i], |
2894 | LTTNG_DOMAIN_NONE); | |
a74934ba | 2895 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2896 | goto error; |
2897 | } | |
2f77fc4b DG |
2898 | } |
2899 | ||
bda32d56 JG |
2900 | /* Set UST session URIs */ |
2901 | if (session->ust_session) { | |
2902 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2903 | ret = add_uri_to_consumer(session, |
bda32d56 | 2904 | session->ust_session->consumer, |
b178f53e | 2905 | &uris[i], LTTNG_DOMAIN_UST); |
bda32d56 JG |
2906 | if (ret != LTTNG_OK) { |
2907 | goto error; | |
2908 | } | |
2909 | } | |
2910 | } | |
2911 | ||
2912 | /* Set kernel session URIs */ | |
2913 | if (session->kernel_session) { | |
2914 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2915 | ret = add_uri_to_consumer(session, |
bda32d56 | 2916 | session->kernel_session->consumer, |
b178f53e | 2917 | &uris[i], LTTNG_DOMAIN_KERNEL); |
bda32d56 JG |
2918 | if (ret != LTTNG_OK) { |
2919 | goto error; | |
2920 | } | |
2921 | } | |
2922 | } | |
2923 | ||
7ab70fe0 DG |
2924 | /* |
2925 | * Make sure to set the session in output mode after we set URI since a | |
2926 | * session can be created without URL (thus flagged in no output mode). | |
2927 | */ | |
2928 | session->output_traces = 1; | |
2929 | if (ksess) { | |
2930 | ksess->output_traces = 1; | |
bda32d56 JG |
2931 | } |
2932 | ||
2933 | if (usess) { | |
7ab70fe0 DG |
2934 | usess->output_traces = 1; |
2935 | } | |
2936 | ||
2f77fc4b | 2937 | /* All good! */ |
f73fabfd | 2938 | ret = LTTNG_OK; |
2f77fc4b DG |
2939 | |
2940 | error: | |
2941 | return ret; | |
2942 | } | |
2943 | ||
b178f53e JG |
2944 | static |
2945 | enum lttng_error_code set_session_output_from_descriptor( | |
2946 | struct ltt_session *session, | |
2947 | const struct lttng_session_descriptor *descriptor) | |
2f77fc4b DG |
2948 | { |
2949 | int ret; | |
b178f53e JG |
2950 | enum lttng_error_code ret_code = LTTNG_OK; |
2951 | enum lttng_session_descriptor_type session_type = | |
2952 | lttng_session_descriptor_get_type(descriptor); | |
2953 | enum lttng_session_descriptor_output_type output_type = | |
2954 | lttng_session_descriptor_get_output_type(descriptor); | |
2955 | struct lttng_uri uris[2] = {}; | |
2956 | size_t uri_count = 0; | |
2957 | ||
2958 | switch (output_type) { | |
2959 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: | |
2960 | goto end; | |
2961 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: | |
2962 | lttng_session_descriptor_get_local_output_uri(descriptor, | |
2963 | &uris[0]); | |
2964 | uri_count = 1; | |
2965 | break; | |
2966 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: | |
2967 | lttng_session_descriptor_get_network_output_uris(descriptor, | |
2968 | &uris[0], &uris[1]); | |
2969 | uri_count = 2; | |
2970 | break; | |
2971 | default: | |
2972 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 2973 | goto end; |
2f77fc4b DG |
2974 | } |
2975 | ||
b178f53e JG |
2976 | switch (session_type) { |
2977 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
2978 | { | |
2979 | struct snapshot_output *new_output = NULL; | |
2980 | ||
2981 | new_output = snapshot_output_alloc(); | |
2982 | if (!new_output) { | |
2983 | ret_code = LTTNG_ERR_NOMEM; | |
2984 | goto end; | |
2985 | } | |
2986 | ||
2987 | ret = snapshot_output_init_with_uri(session, | |
2988 | DEFAULT_SNAPSHOT_MAX_SIZE, | |
2989 | NULL, uris, uri_count, session->consumer, | |
2990 | new_output, &session->snapshot); | |
2991 | if (ret < 0) { | |
2992 | ret_code = (ret == -ENOMEM) ? | |
2993 | LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID; | |
2994 | snapshot_output_destroy(new_output); | |
2995 | goto end; | |
2996 | } | |
2997 | snapshot_add_output(&session->snapshot, new_output); | |
2998 | break; | |
2999 | } | |
3000 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: | |
3001 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3002 | { | |
3003 | ret_code = cmd_set_consumer_uri(session, uri_count, uris); | |
3004 | break; | |
3005 | } | |
3006 | default: | |
3007 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3008 | goto end; |
2f77fc4b | 3009 | } |
b178f53e JG |
3010 | end: |
3011 | return ret_code; | |
3012 | } | |
3013 | ||
3014 | static | |
3015 | enum lttng_error_code cmd_create_session_from_descriptor( | |
3016 | struct lttng_session_descriptor *descriptor, | |
3017 | const lttng_sock_cred *creds, | |
3018 | const char *home_path) | |
3019 | { | |
3020 | int ret; | |
3021 | enum lttng_error_code ret_code; | |
3022 | const char *session_name; | |
3023 | struct ltt_session *new_session = NULL; | |
3024 | enum lttng_session_descriptor_status descriptor_status; | |
2f77fc4b | 3025 | |
e32d7f27 | 3026 | session_lock_list(); |
b178f53e JG |
3027 | if (home_path) { |
3028 | if (*home_path != '/') { | |
3029 | ERR("Home path provided by client is not absolute"); | |
3030 | ret_code = LTTNG_ERR_INVALID; | |
3031 | goto end; | |
3032 | } | |
3033 | } | |
2f77fc4b | 3034 | |
b178f53e JG |
3035 | descriptor_status = lttng_session_descriptor_get_session_name( |
3036 | descriptor, &session_name); | |
3037 | switch (descriptor_status) { | |
3038 | case LTTNG_SESSION_DESCRIPTOR_STATUS_OK: | |
3039 | break; | |
3040 | case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET: | |
3041 | session_name = NULL; | |
3042 | break; | |
3043 | default: | |
3044 | ret_code = LTTNG_ERR_INVALID; | |
3045 | goto end; | |
3046 | } | |
e3876bf0 | 3047 | |
b178f53e | 3048 | ret_code = session_create(session_name, creds->uid, creds->gid, |
e3876bf0 | 3049 | &new_session); |
b178f53e | 3050 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3051 | goto end; |
2f77fc4b DG |
3052 | } |
3053 | ||
b178f53e JG |
3054 | if (!session_name) { |
3055 | ret = lttng_session_descriptor_set_session_name(descriptor, | |
3056 | new_session->name); | |
3057 | if (ret) { | |
3058 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3059 | goto end; | |
3060 | } | |
3061 | } | |
3062 | ||
3063 | if (!lttng_session_descriptor_is_output_destination_initialized( | |
3064 | descriptor)) { | |
3065 | /* | |
3066 | * Only include the session's creation time in the output | |
3067 | * destination if the name of the session itself was | |
3068 | * not auto-generated. | |
3069 | */ | |
3070 | ret_code = lttng_session_descriptor_set_default_output( | |
3071 | descriptor, | |
3072 | session_name ? &new_session->creation_time : NULL, | |
3073 | home_path); | |
3074 | if (ret_code != LTTNG_OK) { | |
e32d7f27 | 3075 | goto end; |
2bba9e53 | 3076 | } |
2bba9e53 | 3077 | } else { |
b178f53e JG |
3078 | new_session->has_user_specified_directory = |
3079 | lttng_session_descriptor_has_output_directory( | |
3080 | descriptor); | |
2f77fc4b DG |
3081 | } |
3082 | ||
b178f53e JG |
3083 | switch (lttng_session_descriptor_get_type(descriptor)) { |
3084 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3085 | new_session->snapshot_mode = 1; | |
3086 | break; | |
3087 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3088 | new_session->live_timer = | |
3089 | lttng_session_descriptor_live_get_timer_interval( | |
3090 | descriptor); | |
3091 | break; | |
3092 | default: | |
3093 | break; | |
3094 | } | |
2f77fc4b | 3095 | |
b178f53e JG |
3096 | ret_code = set_session_output_from_descriptor(new_session, descriptor); |
3097 | if (ret_code != LTTNG_OK) { | |
3098 | goto end; | |
3099 | } | |
3100 | new_session->consumer->enabled = 1; | |
3101 | ret_code = LTTNG_OK; | |
e32d7f27 | 3102 | end: |
b178f53e JG |
3103 | /* Release reference provided by the session_create function. */ |
3104 | session_put(new_session); | |
3105 | if (ret_code != LTTNG_OK && new_session) { | |
3106 | /* Release the global reference on error. */ | |
3107 | session_destroy(new_session); | |
e32d7f27 | 3108 | } |
b178f53e JG |
3109 | session_unlock_list(); |
3110 | return ret_code; | |
2f77fc4b DG |
3111 | } |
3112 | ||
b178f53e JG |
3113 | enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock, |
3114 | struct lttng_session_descriptor **return_descriptor) | |
27babd3a DG |
3115 | { |
3116 | int ret; | |
b178f53e JG |
3117 | size_t payload_size; |
3118 | struct lttng_dynamic_buffer payload; | |
3119 | struct lttng_buffer_view home_dir_view; | |
3120 | struct lttng_buffer_view session_descriptor_view; | |
3121 | struct lttng_session_descriptor *session_descriptor = NULL; | |
3122 | enum lttng_error_code ret_code; | |
3123 | ||
3124 | lttng_dynamic_buffer_init(&payload); | |
3125 | if (cmd_ctx->lsm->u.create_session.home_dir_size >= | |
3126 | LTTNG_PATH_MAX) { | |
3127 | ret_code = LTTNG_ERR_INVALID; | |
3128 | goto error; | |
27babd3a | 3129 | } |
b178f53e JG |
3130 | if (cmd_ctx->lsm->u.create_session.session_descriptor_size > |
3131 | LTTNG_SESSION_DESCRIPTOR_MAX_LEN) { | |
3132 | ret_code = LTTNG_ERR_INVALID; | |
3133 | goto error; | |
27babd3a DG |
3134 | } |
3135 | ||
b178f53e JG |
3136 | payload_size = cmd_ctx->lsm->u.create_session.home_dir_size + |
3137 | cmd_ctx->lsm->u.create_session.session_descriptor_size; | |
3138 | ret = lttng_dynamic_buffer_set_size(&payload, payload_size); | |
3139 | if (ret) { | |
3140 | ret_code = LTTNG_ERR_NOMEM; | |
3141 | goto error; | |
27babd3a DG |
3142 | } |
3143 | ||
b178f53e JG |
3144 | ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size); |
3145 | if (ret <= 0) { | |
3146 | ERR("Reception of session descriptor failed, aborting."); | |
3147 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3148 | goto error; | |
27babd3a DG |
3149 | } |
3150 | ||
b178f53e JG |
3151 | home_dir_view = lttng_buffer_view_from_dynamic_buffer( |
3152 | &payload, | |
3153 | 0, | |
3154 | cmd_ctx->lsm->u.create_session.home_dir_size); | |
3155 | session_descriptor_view = lttng_buffer_view_from_dynamic_buffer( | |
3156 | &payload, | |
3157 | cmd_ctx->lsm->u.create_session.home_dir_size, | |
3158 | cmd_ctx->lsm->u.create_session.session_descriptor_size); | |
27babd3a | 3159 | |
b178f53e JG |
3160 | ret = lttng_session_descriptor_create_from_buffer( |
3161 | &session_descriptor_view, &session_descriptor); | |
3162 | if (ret < 0) { | |
3163 | ERR("Failed to create session descriptor from payload of \"create session\" command"); | |
3164 | ret_code = LTTNG_ERR_INVALID; | |
3165 | goto error; | |
3166 | } | |
27babd3a | 3167 | |
b178f53e JG |
3168 | /* |
3169 | * Sets the descriptor's auto-generated properties (name, output) if | |
3170 | * needed. | |
3171 | */ | |
3172 | ret_code = cmd_create_session_from_descriptor(session_descriptor, | |
3173 | &cmd_ctx->creds, | |
3174 | home_dir_view.size ? home_dir_view.data : NULL); | |
3175 | if (ret_code != LTTNG_OK) { | |
3176 | goto error; | |
e32d7f27 | 3177 | } |
b178f53e JG |
3178 | |
3179 | ret_code = LTTNG_OK; | |
3180 | *return_descriptor = session_descriptor; | |
3181 | session_descriptor = NULL; | |
3182 | error: | |
3183 | lttng_dynamic_buffer_reset(&payload); | |
3184 | lttng_session_descriptor_destroy(session_descriptor); | |
3185 | return ret_code; | |
27babd3a DG |
3186 | } |
3187 | ||
3e3665b8 JG |
3188 | static |
3189 | void cmd_destroy_session_reply(const struct ltt_session *session, | |
3190 | void *_reply_context) | |
3191 | { | |
3192 | int ret; | |
3193 | ssize_t comm_ret; | |
3194 | const struct cmd_destroy_session_reply_context *reply_context = | |
3195 | _reply_context; | |
3196 | struct lttng_dynamic_buffer payload; | |
3197 | struct lttcomm_session_destroy_command_header cmd_header; | |
3198 | struct lttng_trace_archive_location *location = NULL; | |
3199 | struct lttcomm_lttng_msg llm = { | |
3200 | .cmd_type = LTTNG_DESTROY_SESSION, | |
3285a971 | 3201 | .ret_code = reply_context->destruction_status, |
3e3665b8 JG |
3202 | .pid = UINT32_MAX, |
3203 | .cmd_header_size = | |
3204 | sizeof(struct lttcomm_session_destroy_command_header), | |
3205 | .data_size = 0, | |
3206 | }; | |
3207 | size_t payload_size_before_location; | |
3208 | ||
3209 | lttng_dynamic_buffer_init(&payload); | |
3210 | ||
3211 | ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm)); | |
3212 | if (ret) { | |
3213 | ERR("Failed to append session destruction message"); | |
3214 | goto error; | |
3215 | } | |
3216 | ||
3217 | cmd_header.rotation_state = | |
3218 | (int32_t) (reply_context->implicit_rotation_on_destroy ? | |
3219 | session->rotation_state : | |
3220 | LTTNG_ROTATION_STATE_NO_ROTATION); | |
3221 | ret = lttng_dynamic_buffer_append(&payload, &cmd_header, | |
3222 | sizeof(cmd_header)); | |
3223 | if (ret) { | |
3224 | ERR("Failed to append session destruction command header"); | |
3225 | goto error; | |
3226 | } | |
3227 | ||
3228 | if (!reply_context->implicit_rotation_on_destroy) { | |
3229 | DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply", | |
3230 | session->name); | |
3231 | goto send_reply; | |
3232 | } | |
3233 | if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) { | |
3234 | DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply", | |
3235 | session->name); | |
3236 | goto send_reply; | |
3237 | } | |
3238 | ||
3239 | location = session_get_trace_archive_location(session); | |
3240 | if (!location) { | |
3241 | ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"", | |
3242 | session->name); | |
3243 | goto error; | |
3244 | } | |
3245 | ||
3246 | payload_size_before_location = payload.size; | |
3247 | comm_ret = lttng_trace_archive_location_serialize(location, | |
3248 | &payload); | |
3249 | if (comm_ret < 0) { | |
3250 | ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"", | |
3251 | session->name); | |
3252 | goto error; | |
3253 | } | |
3254 | /* Update the message to indicate the location's length. */ | |
3255 | ((struct lttcomm_lttng_msg *) payload.data)->data_size = | |
3256 | payload.size - payload_size_before_location; | |
3257 | send_reply: | |
3258 | comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd, | |
3259 | payload.data, payload.size); | |
3260 | if (comm_ret != (ssize_t) payload.size) { | |
3261 | ERR("Failed to send result of the destruction of session \"%s\" to client", | |
3262 | session->name); | |
3263 | } | |
3264 | error: | |
3265 | ret = close(reply_context->reply_sock_fd); | |
3266 | if (ret) { | |
3267 | PERROR("Failed to close client socket in deferred session destroy reply"); | |
3268 | } | |
3269 | lttng_dynamic_buffer_reset(&payload); | |
3270 | free(_reply_context); | |
3271 | } | |
3272 | ||
2f77fc4b DG |
3273 | /* |
3274 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
3275 | * |
3276 | * Called with session lock held. | |
2f77fc4b | 3277 | */ |
e32d7f27 | 3278 | int cmd_destroy_session(struct ltt_session *session, |
3e3665b8 JG |
3279 | struct notification_thread_handle *notification_thread_handle, |
3280 | int *sock_fd) | |
2f77fc4b DG |
3281 | { |
3282 | int ret; | |
3285a971 | 3283 | enum lttng_error_code destruction_last_error = LTTNG_OK; |
3e3665b8 JG |
3284 | struct cmd_destroy_session_reply_context *reply_context = NULL; |
3285 | ||
3286 | if (sock_fd) { | |
3287 | reply_context = zmalloc(sizeof(*reply_context)); | |
3288 | if (!reply_context) { | |
3289 | ret = LTTNG_ERR_NOMEM; | |
3290 | goto end; | |
3291 | } | |
3292 | reply_context->reply_sock_fd = *sock_fd; | |
3293 | } | |
2f77fc4b DG |
3294 | |
3295 | /* Safety net */ | |
3296 | assert(session); | |
3297 | ||
3e3665b8 JG |
3298 | DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, |
3299 | session->id); | |
3300 | if (session->active) { | |
3301 | DBG("Session \"%s\" is active, attempting to stop it before destroying it", | |
3302 | session->name); | |
3303 | ret = cmd_stop_trace(session); | |
3304 | if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
3305 | /* Carry on with the destruction of the session. */ | |
3306 | ERR("Failed to stop session \"%s\" as part of its destruction: %s", | |
3307 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3308 | destruction_last_error = ret; |
3e3665b8 JG |
3309 | } |
3310 | } | |
5c408ad8 | 3311 | |
92816cc3 JG |
3312 | if (session->rotation_schedule_timer_enabled) { |
3313 | if (timer_session_rotation_schedule_timer_stop( | |
3314 | session)) { | |
3315 | ERR("Failed to stop the \"rotation schedule\" timer of session %s", | |
3316 | session->name); | |
3285a971 | 3317 | destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR; |
92816cc3 | 3318 | } |
259c2674 JD |
3319 | } |
3320 | ||
90936dcf JD |
3321 | if (session->rotate_size) { |
3322 | unsubscribe_session_consumed_size_rotation(session, notification_thread_handle); | |
3323 | session->rotate_size = 0; | |
3324 | } | |
3325 | ||
d2956687 JG |
3326 | if (session->most_recent_chunk_id.is_set && |
3327 | session->most_recent_chunk_id.value != 0 && | |
b5893d8e JG |
3328 | session->current_trace_chunk && session->output_traces) { |
3329 | /* | |
3330 | * Perform a last rotation on destruction if rotations have | |
3331 | * occurred during the session's lifetime. | |
3332 | */ | |
343defc2 MD |
3333 | ret = cmd_rotate_session(session, NULL, false, |
3334 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
d2956687 JG |
3335 | if (ret != LTTNG_OK) { |
3336 | ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s", | |
3337 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3338 | destruction_last_error = -ret; |
124473a3 | 3339 | } |
3e3665b8 JG |
3340 | if (reply_context) { |
3341 | reply_context->implicit_rotation_on_destroy = true; | |
3342 | } | |
070b6a86 | 3343 | } else if (session->has_been_started && session->current_trace_chunk) { |
7fdbed1c JG |
3344 | /* |
3345 | * The user has not triggered a session rotation. However, to | |
3346 | * ensure all data has been consumed, the session is rotated | |
3347 | * to a 'null' trace chunk before it is destroyed. | |
3348 | * | |
3349 | * This is a "quiet" rotation meaning that no notification is | |
3350 | * emitted and no renaming of the current trace chunk takes | |
3351 | * place. | |
3352 | */ | |
343defc2 MD |
3353 | ret = cmd_rotate_session(session, NULL, true, |
3354 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
7fdbed1c JG |
3355 | if (ret != LTTNG_OK) { |
3356 | ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s", | |
3357 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3358 | destruction_last_error = -ret; |
7fdbed1c JG |
3359 | } |
3360 | } | |
5c408ad8 | 3361 | |
a503e1ef JG |
3362 | if (session->shm_path[0]) { |
3363 | /* | |
3364 | * When a session is created with an explicit shm_path, | |
3365 | * the consumer daemon will create its shared memory files | |
3366 | * at that location and will *not* unlink them. This is normal | |
3367 | * as the intention of that feature is to make it possible | |
3368 | * to retrieve the content of those files should a crash occur. | |
3369 | * | |
3370 | * To ensure the content of those files can be used, the | |
3371 | * sessiond daemon will replicate the content of the metadata | |
3372 | * cache in a metadata file. | |
3373 | * | |
3374 | * On clean-up, it is expected that the consumer daemon will | |
3375 | * unlink the shared memory files and that the session daemon | |
3376 | * will unlink the metadata file. Then, the session's directory | |
3377 | * in the shm path can be removed. | |
3378 | * | |
3379 | * Unfortunately, a flaw in the design of the sessiond's and | |
3380 | * consumerd's tear down of channels makes it impossible to | |
3381 | * determine when the sessiond _and_ the consumerd have both | |
3382 | * destroyed their representation of a channel. For one, the | |
3383 | * unlinking, close, and rmdir happen in deferred 'call_rcu' | |
3384 | * callbacks in both daemons. | |
3385 | * | |
3386 | * However, it is also impossible for the sessiond to know when | |
3387 | * the consumer daemon is done destroying its channel(s) since | |
3388 | * it occurs as a reaction to the closing of the channel's file | |
3389 | * descriptor. There is no resulting communication initiated | |
3390 | * from the consumerd to the sessiond to confirm that the | |
3391 | * operation is completed (and was successful). | |
3392 | * | |
3393 | * Until this is all fixed, the session daemon checks for the | |
3394 | * removal of the session's shm path which makes it possible | |
3395 | * to safely advertise a session as having been destroyed. | |
3396 | * | |
3397 | * Prior to this fix, it was not possible to reliably save | |
3398 | * a session making use of the --shm-path option, destroy it, | |
3399 | * and load it again. This is because the creation of the | |
3400 | * session would fail upon seeing the session's shm path | |
3401 | * already in existence. | |
3402 | * | |
3403 | * Note that none of the error paths in the check for the | |
3404 | * directory's existence return an error. This is normal | |
3405 | * as there isn't much that can be done. The session will | |
3406 | * be destroyed properly, except that we can't offer the | |
3407 | * guarantee that the same session can be re-created. | |
3408 | */ | |
3409 | current_completion_handler = &destroy_completion_handler.handler; | |
3410 | ret = lttng_strncpy(destroy_completion_handler.shm_path, | |
3411 | session->shm_path, | |
3412 | sizeof(destroy_completion_handler.shm_path)); | |
3413 | assert(!ret); | |
3414 | } | |
e32d7f27 JG |
3415 | |
3416 | /* | |
3417 | * The session is destroyed. However, note that the command context | |
3418 | * still holds a reference to the session, thus delaying its destruction | |
3419 | * _at least_ up to the point when that reference is released. | |
3420 | */ | |
3421 | session_destroy(session); | |
3e3665b8 | 3422 | if (reply_context) { |
3285a971 | 3423 | reply_context->destruction_status = destruction_last_error; |
3e3665b8 JG |
3424 | ret = session_add_destroy_notifier(session, |
3425 | cmd_destroy_session_reply, | |
3426 | (void *) reply_context); | |
3427 | if (ret) { | |
3428 | ret = LTTNG_ERR_FATAL; | |
3429 | goto end; | |
3430 | } else { | |
3431 | *sock_fd = -1; | |
3432 | } | |
3433 | } | |
3434 | ret = LTTNG_OK; | |
3435 | end: | |
2f77fc4b DG |
3436 | return ret; |
3437 | } | |
3438 | ||
2f77fc4b DG |
3439 | /* |
3440 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3441 | */ | |
56a37563 JG |
3442 | int cmd_register_consumer(struct ltt_session *session, |
3443 | enum lttng_domain_type domain, const char *sock_path, | |
3444 | struct consumer_data *cdata) | |
2f77fc4b DG |
3445 | { |
3446 | int ret, sock; | |
dd81b457 | 3447 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
3448 | |
3449 | assert(session); | |
3450 | assert(cdata); | |
3451 | assert(sock_path); | |
3452 | ||
3453 | switch (domain) { | |
3454 | case LTTNG_DOMAIN_KERNEL: | |
3455 | { | |
3456 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3457 | ||
3458 | assert(ksess); | |
3459 | ||
3460 | /* Can't register a consumer if there is already one */ | |
3461 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 3462 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
3463 | goto error; |
3464 | } | |
3465 | ||
3466 | sock = lttcomm_connect_unix_sock(sock_path); | |
3467 | if (sock < 0) { | |
f73fabfd | 3468 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
3469 | goto error; |
3470 | } | |
4ce514c4 | 3471 | cdata->cmd_sock = sock; |
2f77fc4b | 3472 | |
4ce514c4 | 3473 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 3474 | if (socket == NULL) { |
f66c074c DG |
3475 | ret = close(sock); |
3476 | if (ret < 0) { | |
3477 | PERROR("close register consumer"); | |
3478 | } | |
4ce514c4 | 3479 | cdata->cmd_sock = -1; |
f73fabfd | 3480 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3481 | goto error; |
3482 | } | |
3483 | ||
3484 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
3485 | if (socket->lock == NULL) { | |
3486 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 3487 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3488 | goto error; |
3489 | } | |
3490 | pthread_mutex_init(socket->lock, NULL); | |
3491 | socket->registered = 1; | |
3492 | ||
3493 | rcu_read_lock(); | |
3494 | consumer_add_socket(socket, ksess->consumer); | |
3495 | rcu_read_unlock(); | |
3496 | ||
3497 | pthread_mutex_lock(&cdata->pid_mutex); | |
3498 | cdata->pid = -1; | |
3499 | pthread_mutex_unlock(&cdata->pid_mutex); | |
3500 | ||
3501 | break; | |
3502 | } | |
3503 | default: | |
3504 | /* TODO: Userspace tracing */ | |
f73fabfd | 3505 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3506 | goto error; |
3507 | } | |
3508 | ||
dd81b457 | 3509 | return LTTNG_OK; |
2f77fc4b DG |
3510 | |
3511 | error: | |
dd81b457 DG |
3512 | if (socket) { |
3513 | consumer_destroy_socket(socket); | |
3514 | } | |
2f77fc4b DG |
3515 | return ret; |
3516 | } | |
3517 | ||
3518 | /* | |
3519 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3520 | */ | |
3521 | ssize_t cmd_list_domains(struct ltt_session *session, | |
3522 | struct lttng_domain **domains) | |
3523 | { | |
3524 | int ret, index = 0; | |
3525 | ssize_t nb_dom = 0; | |
fefd409b DG |
3526 | struct agent *agt; |
3527 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
3528 | |
3529 | if (session->kernel_session != NULL) { | |
3530 | DBG3("Listing domains found kernel domain"); | |
3531 | nb_dom++; | |
3532 | } | |
3533 | ||
3534 | if (session->ust_session != NULL) { | |
3535 | DBG3("Listing domains found UST global domain"); | |
3536 | nb_dom++; | |
3c6a091f | 3537 | |
e0a74f01 | 3538 | rcu_read_lock(); |
fefd409b DG |
3539 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3540 | agt, node.node) { | |
3541 | if (agt->being_used) { | |
3542 | nb_dom++; | |
3543 | } | |
3c6a091f | 3544 | } |
e0a74f01 | 3545 | rcu_read_unlock(); |
2f77fc4b DG |
3546 | } |
3547 | ||
fa64dfb4 JG |
3548 | if (!nb_dom) { |
3549 | goto end; | |
3550 | } | |
3551 | ||
2f77fc4b DG |
3552 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
3553 | if (*domains == NULL) { | |
f73fabfd | 3554 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3555 | goto error; |
3556 | } | |
3557 | ||
3558 | if (session->kernel_session != NULL) { | |
3559 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
b5edb9e8 PP |
3560 | |
3561 | /* Kernel session buffer type is always GLOBAL */ | |
3562 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
3563 | ||
2f77fc4b DG |
3564 | index++; |
3565 | } | |
3566 | ||
3567 | if (session->ust_session != NULL) { | |
3568 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 3569 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 3570 | index++; |
3c6a091f | 3571 | |
e0a74f01 | 3572 | rcu_read_lock(); |
fefd409b DG |
3573 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3574 | agt, node.node) { | |
3575 | if (agt->being_used) { | |
3576 | (*domains)[index].type = agt->domain; | |
3577 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
3578 | index++; | |
3579 | } | |
3c6a091f | 3580 | } |
e0a74f01 | 3581 | rcu_read_unlock(); |
2f77fc4b | 3582 | } |
fa64dfb4 | 3583 | end: |
2f77fc4b DG |
3584 | return nb_dom; |
3585 | ||
3586 | error: | |
f73fabfd DG |
3587 | /* Return negative value to differentiate return code */ |
3588 | return -ret; | |
2f77fc4b DG |
3589 | } |
3590 | ||
3591 | ||
3592 | /* | |
3593 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3594 | */ | |
56a37563 JG |
3595 | ssize_t cmd_list_channels(enum lttng_domain_type domain, |
3596 | struct ltt_session *session, struct lttng_channel **channels) | |
2f77fc4b | 3597 | { |
53e367f9 | 3598 | ssize_t nb_chan = 0, payload_size = 0, ret; |
2f77fc4b DG |
3599 | |
3600 | switch (domain) { | |
3601 | case LTTNG_DOMAIN_KERNEL: | |
3602 | if (session->kernel_session != NULL) { | |
3603 | nb_chan = session->kernel_session->channel_count; | |
3604 | } | |
3605 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 | 3606 | if (nb_chan <= 0) { |
53e367f9 JG |
3607 | ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
3608 | goto end; | |
c7d620a2 | 3609 | } |
2f77fc4b DG |
3610 | break; |
3611 | case LTTNG_DOMAIN_UST: | |
3612 | if (session->ust_session != NULL) { | |
7ffc31a2 | 3613 | rcu_read_lock(); |
2f77fc4b | 3614 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
3615 | session->ust_session->domain_global.channels); |
3616 | rcu_read_unlock(); | |
2f77fc4b DG |
3617 | } |
3618 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 3619 | if (nb_chan < 0) { |
53e367f9 JG |
3620 | ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND; |
3621 | goto end; | |
c7d620a2 | 3622 | } |
2f77fc4b DG |
3623 | break; |
3624 | default: | |
53e367f9 JG |
3625 | ret = -LTTNG_ERR_UND; |
3626 | goto end; | |
2f77fc4b DG |
3627 | } |
3628 | ||
3629 | if (nb_chan > 0) { | |
53e367f9 | 3630 | const size_t channel_size = sizeof(struct lttng_channel) + |
cf0bcb51 JG |
3631 | sizeof(struct lttng_channel_extended); |
3632 | struct lttng_channel_extended *channel_exts; | |
53e367f9 JG |
3633 | |
3634 | payload_size = nb_chan * channel_size; | |
3635 | *channels = zmalloc(payload_size); | |
2f77fc4b | 3636 | if (*channels == NULL) { |
53e367f9 JG |
3637 | ret = -LTTNG_ERR_FATAL; |
3638 | goto end; | |
2f77fc4b DG |
3639 | } |
3640 | ||
53e367f9 JG |
3641 | channel_exts = ((void *) *channels) + |
3642 | (nb_chan * sizeof(struct lttng_channel)); | |
d449df4a MD |
3643 | ret = list_lttng_channels(domain, session, *channels, channel_exts); |
3644 | if (ret != LTTNG_OK) { | |
3645 | free(*channels); | |
3646 | *channels = NULL; | |
3647 | goto end; | |
3648 | } | |
53e367f9 JG |
3649 | } else { |
3650 | *channels = NULL; | |
2f77fc4b DG |
3651 | } |
3652 | ||
53e367f9 JG |
3653 | ret = payload_size; |
3654 | end: | |
3655 | return ret; | |
2f77fc4b DG |
3656 | } |
3657 | ||
3658 | /* | |
3659 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3660 | */ | |
56a37563 JG |
3661 | ssize_t cmd_list_events(enum lttng_domain_type domain, |
3662 | struct ltt_session *session, char *channel_name, | |
b4e3ceb9 | 3663 | struct lttng_event **events, size_t *total_size) |
2f77fc4b DG |
3664 | { |
3665 | int ret = 0; | |
3666 | ssize_t nb_event = 0; | |
3667 | ||
3668 | switch (domain) { | |
3669 | case LTTNG_DOMAIN_KERNEL: | |
3670 | if (session->kernel_session != NULL) { | |
3671 | nb_event = list_lttng_kernel_events(channel_name, | |
b4e3ceb9 PP |
3672 | session->kernel_session, events, |
3673 | total_size); | |
2f77fc4b DG |
3674 | } |
3675 | break; | |
3676 | case LTTNG_DOMAIN_UST: | |
3677 | { | |
3678 | if (session->ust_session != NULL) { | |
3679 | nb_event = list_lttng_ust_global_events(channel_name, | |
b4e3ceb9 PP |
3680 | &session->ust_session->domain_global, events, |
3681 | total_size); | |
2f77fc4b DG |
3682 | } |
3683 | break; | |
3684 | } | |
5cdb6027 | 3685 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3686 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3687 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3688 | if (session->ust_session) { |
fefd409b DG |
3689 | struct lttng_ht_iter iter; |
3690 | struct agent *agt; | |
3691 | ||
b11feea5 | 3692 | rcu_read_lock(); |
fefd409b DG |
3693 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
3694 | &iter.iter, agt, node.node) { | |
1dfd9906 JG |
3695 | if (agt->domain == domain) { |
3696 | nb_event = list_lttng_agent_events( | |
b4e3ceb9 PP |
3697 | agt, events, |
3698 | total_size); | |
1dfd9906 JG |
3699 | break; |
3700 | } | |
fefd409b | 3701 | } |
b11feea5 | 3702 | rcu_read_unlock(); |
3c6a091f DG |
3703 | } |
3704 | break; | |
2f77fc4b | 3705 | default: |
f73fabfd | 3706 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3707 | goto error; |
3708 | } | |
3709 | ||
f73fabfd | 3710 | return nb_event; |
2f77fc4b DG |
3711 | |
3712 | error: | |
f73fabfd DG |
3713 | /* Return negative value to differentiate return code */ |
3714 | return -ret; | |
2f77fc4b DG |
3715 | } |
3716 | ||
3717 | /* | |
3718 | * Using the session list, filled a lttng_session array to send back to the | |
3719 | * client for session listing. | |
3720 | * | |
3721 | * The session list lock MUST be acquired before calling this function. Use | |
3722 | * session_lock_list() and session_unlock_list(). | |
3723 | */ | |
b178f53e JG |
3724 | void cmd_list_lttng_sessions(struct lttng_session *sessions, |
3725 | size_t session_count, uid_t uid, gid_t gid) | |
2f77fc4b DG |
3726 | { |
3727 | int ret; | |
3728 | unsigned int i = 0; | |
3729 | struct ltt_session *session; | |
3730 | struct ltt_session_list *list = session_get_list(); | |
b178f53e JG |
3731 | struct lttng_session_extended *extended = |
3732 | (typeof(extended)) (&sessions[session_count]); | |
2f77fc4b DG |
3733 | |
3734 | DBG("Getting all available session for UID %d GID %d", | |
3735 | uid, gid); | |
3736 | /* | |
3737 | * Iterate over session list and append data after the control struct in | |
3738 | * the buffer. | |
3739 | */ | |
3740 | cds_list_for_each_entry(session, &list->head, list) { | |
e32d7f27 JG |
3741 | if (!session_get(session)) { |
3742 | continue; | |
3743 | } | |
2f77fc4b DG |
3744 | /* |
3745 | * Only list the sessions the user can control. | |
3746 | */ | |
e32d7f27 JG |
3747 | if (!session_access_ok(session, uid, gid) || |
3748 | session->destroyed) { | |
3749 | session_put(session); | |
2f77fc4b DG |
3750 | continue; |
3751 | } | |
3752 | ||
3753 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3754 | struct ltt_ust_session *usess = session->ust_session; | |
3755 | ||
3756 | if (session->consumer->type == CONSUMER_DST_NET || | |
3757 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
3758 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3759 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 3760 | sizeof(sessions[i].path), session); |
2f77fc4b | 3761 | } else { |
dec56f6c | 3762 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
366a9222 | 3763 | session->consumer->dst.session_root_path); |
2f77fc4b DG |
3764 | } |
3765 | if (ret < 0) { | |
3766 | PERROR("snprintf session path"); | |
e32d7f27 | 3767 | session_put(session); |
2f77fc4b DG |
3768 | continue; |
3769 | } | |
3770 | ||
3771 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
3772 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 3773 | sessions[i].enabled = session->active; |
2cbf8fed | 3774 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 3775 | sessions[i].live_timer_interval = session->live_timer; |
b178f53e JG |
3776 | extended[i].creation_time.value = (uint64_t) session->creation_time; |
3777 | extended[i].creation_time.is_set = 1; | |
2f77fc4b | 3778 | i++; |
e32d7f27 | 3779 | session_put(session); |
2f77fc4b DG |
3780 | } |
3781 | } | |
3782 | ||
806e2684 | 3783 | /* |
6d805429 | 3784 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 3785 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 3786 | */ |
6d805429 | 3787 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
3788 | { |
3789 | int ret; | |
3790 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3791 | struct ltt_ust_session *usess = session->ust_session; | |
3792 | ||
3793 | assert(session); | |
3794 | ||
5c408ad8 JD |
3795 | DBG("Data pending for session %s", session->name); |
3796 | ||
806e2684 | 3797 | /* Session MUST be stopped to ask for data availability. */ |
8382cf6f | 3798 | if (session->active) { |
806e2684 DG |
3799 | ret = LTTNG_ERR_SESSION_STARTED; |
3800 | goto error; | |
3a89d11a DG |
3801 | } else { |
3802 | /* | |
3803 | * If stopped, just make sure we've started before else the above call | |
3804 | * will always send that there is data pending. | |
3805 | * | |
3806 | * The consumer assumes that when the data pending command is received, | |
3807 | * the trace has been started before or else no output data is written | |
3808 | * by the streams which is a condition for data pending. So, this is | |
3809 | * *VERY* important that we don't ask the consumer before a start | |
3810 | * trace. | |
3811 | */ | |
8382cf6f | 3812 | if (!session->has_been_started) { |
3a89d11a DG |
3813 | ret = 0; |
3814 | goto error; | |
3815 | } | |
806e2684 DG |
3816 | } |
3817 | ||
92816cc3 JG |
3818 | /* A rotation is still pending, we have to wait. */ |
3819 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { | |
5c408ad8 JD |
3820 | DBG("Rotate still pending for session %s", session->name); |
3821 | ret = 1; | |
3822 | goto error; | |
3823 | } | |
3824 | ||
806e2684 | 3825 | if (ksess && ksess->consumer) { |
6d805429 DG |
3826 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
3827 | if (ret == 1) { | |
806e2684 DG |
3828 | /* Data is still being extracted for the kernel. */ |
3829 | goto error; | |
3830 | } | |
3831 | } | |
3832 | ||
3833 | if (usess && usess->consumer) { | |
6d805429 DG |
3834 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
3835 | if (ret == 1) { | |
806e2684 DG |
3836 | /* Data is still being extracted for the kernel. */ |
3837 | goto error; | |
3838 | } | |
3839 | } | |
3840 | ||
3841 | /* Data is ready to be read by a viewer */ | |
6d805429 | 3842 | ret = 0; |
806e2684 DG |
3843 | |
3844 | error: | |
3845 | return ret; | |
3846 | } | |
3847 | ||
6dc3064a DG |
3848 | /* |
3849 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
3850 | * | |
3851 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3852 | */ | |
3853 | int cmd_snapshot_add_output(struct ltt_session *session, | |
df4f5a87 | 3854 | const struct lttng_snapshot_output *output, uint32_t *id) |
6dc3064a DG |
3855 | { |
3856 | int ret; | |
3857 | struct snapshot_output *new_output; | |
3858 | ||
3859 | assert(session); | |
3860 | assert(output); | |
3861 | ||
3862 | DBG("Cmd snapshot add output for session %s", session->name); | |
3863 | ||
3864 | /* | |
903ef685 | 3865 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
3866 | */ |
3867 | if (session->output_traces) { | |
903ef685 | 3868 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3869 | goto error; |
3870 | } | |
3871 | ||
54213acc JG |
3872 | if (session->has_non_mmap_channel) { |
3873 | ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED; | |
3874 | goto error; | |
3875 | } | |
3876 | ||
6dc3064a DG |
3877 | /* Only one output is allowed until we have the "tee" feature. */ |
3878 | if (session->snapshot.nb_output == 1) { | |
3879 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
3880 | goto error; | |
3881 | } | |
3882 | ||
3883 | new_output = snapshot_output_alloc(); | |
3884 | if (!new_output) { | |
3885 | ret = LTTNG_ERR_NOMEM; | |
3886 | goto error; | |
3887 | } | |
3888 | ||
b178f53e | 3889 | ret = snapshot_output_init(session, output->max_size, output->name, |
6dc3064a DG |
3890 | output->ctrl_url, output->data_url, session->consumer, new_output, |
3891 | &session->snapshot); | |
3892 | if (ret < 0) { | |
3893 | if (ret == -ENOMEM) { | |
3894 | ret = LTTNG_ERR_NOMEM; | |
3895 | } else { | |
3896 | ret = LTTNG_ERR_INVALID; | |
3897 | } | |
3898 | goto free_error; | |
3899 | } | |
3900 | ||
6dc3064a DG |
3901 | rcu_read_lock(); |
3902 | snapshot_add_output(&session->snapshot, new_output); | |
3903 | if (id) { | |
3904 | *id = new_output->id; | |
3905 | } | |
3906 | rcu_read_unlock(); | |
3907 | ||
3908 | return LTTNG_OK; | |
3909 | ||
3910 | free_error: | |
3911 | snapshot_output_destroy(new_output); | |
3912 | error: | |
3913 | return ret; | |
3914 | } | |
3915 | ||
3916 | /* | |
3917 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
3918 | * | |
3919 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3920 | */ | |
3921 | int cmd_snapshot_del_output(struct ltt_session *session, | |
df4f5a87 | 3922 | const struct lttng_snapshot_output *output) |
6dc3064a DG |
3923 | { |
3924 | int ret; | |
eb240553 | 3925 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
3926 | |
3927 | assert(session); | |
3928 | assert(output); | |
3929 | ||
6dc3064a DG |
3930 | rcu_read_lock(); |
3931 | ||
3932 | /* | |
d3f14b8a MD |
3933 | * Permission denied to create an output if the session is not |
3934 | * set in no output mode. | |
6dc3064a DG |
3935 | */ |
3936 | if (session->output_traces) { | |
903ef685 | 3937 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3938 | goto error; |
3939 | } | |
3940 | ||
eb240553 DG |
3941 | if (output->id) { |
3942 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
3943 | session->name); | |
3944 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
3945 | } else if (*output->name != '\0') { | |
3946 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
3947 | session->name); | |
3948 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
3949 | } | |
6dc3064a DG |
3950 | if (!sout) { |
3951 | ret = LTTNG_ERR_INVALID; | |
3952 | goto error; | |
3953 | } | |
3954 | ||
3955 | snapshot_delete_output(&session->snapshot, sout); | |
3956 | snapshot_output_destroy(sout); | |
3957 | ret = LTTNG_OK; | |
3958 | ||
3959 | error: | |
3960 | rcu_read_unlock(); | |
3961 | return ret; | |
3962 | } | |
3963 | ||
3964 | /* | |
3965 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
3966 | * | |
3967 | * If no output is available, outputs is untouched and 0 is returned. | |
3968 | * | |
3969 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
3970 | */ | |
3971 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
3972 | struct lttng_snapshot_output **outputs) | |
3973 | { | |
3974 | int ret, idx = 0; | |
b223ca94 | 3975 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
3976 | struct lttng_ht_iter iter; |
3977 | struct snapshot_output *output; | |
3978 | ||
3979 | assert(session); | |
3980 | assert(outputs); | |
3981 | ||
3982 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
3983 | ||
3984 | /* | |
d3f14b8a MD |
3985 | * Permission denied to create an output if the session is not |
3986 | * set in no output mode. | |
6dc3064a DG |
3987 | */ |
3988 | if (session->output_traces) { | |
903ef685 JG |
3989 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
3990 | goto end; | |
6dc3064a DG |
3991 | } |
3992 | ||
3993 | if (session->snapshot.nb_output == 0) { | |
3994 | ret = 0; | |
903ef685 | 3995 | goto end; |
6dc3064a DG |
3996 | } |
3997 | ||
3998 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
3999 | if (!list) { | |
b223ca94 | 4000 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4001 | goto end; |
6dc3064a DG |
4002 | } |
4003 | ||
4004 | /* Copy list from session to the new list object. */ | |
b223ca94 | 4005 | rcu_read_lock(); |
6dc3064a DG |
4006 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
4007 | output, node.node) { | |
4008 | assert(output->consumer); | |
4009 | list[idx].id = output->id; | |
4010 | list[idx].max_size = output->max_size; | |
6ce22875 MD |
4011 | if (lttng_strncpy(list[idx].name, output->name, |
4012 | sizeof(list[idx].name))) { | |
4013 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4014 | goto error; |
6ce22875 | 4015 | } |
6dc3064a | 4016 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
6ce22875 | 4017 | if (lttng_strncpy(list[idx].ctrl_url, |
366a9222 | 4018 | output->consumer->dst.session_root_path, |
6ce22875 MD |
4019 | sizeof(list[idx].ctrl_url))) { |
4020 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4021 | goto error; |
6ce22875 | 4022 | } |
6dc3064a DG |
4023 | } else { |
4024 | /* Control URI. */ | |
4025 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
4026 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
4027 | if (ret < 0) { | |
b223ca94 | 4028 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4029 | goto error; |
6dc3064a DG |
4030 | } |
4031 | ||
4032 | /* Data URI. */ | |
4033 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
4034 | list[idx].data_url, sizeof(list[idx].data_url)); | |
4035 | if (ret < 0) { | |
b223ca94 | 4036 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4037 | goto error; |
6dc3064a DG |
4038 | } |
4039 | } | |
4040 | idx++; | |
4041 | } | |
4042 | ||
4043 | *outputs = list; | |
b223ca94 JG |
4044 | list = NULL; |
4045 | ret = session->snapshot.nb_output; | |
6dc3064a | 4046 | error: |
903ef685 | 4047 | rcu_read_unlock(); |
b223ca94 | 4048 | free(list); |
903ef685 | 4049 | end: |
b223ca94 | 4050 | return ret; |
6dc3064a DG |
4051 | } |
4052 | ||
93ec662e JD |
4053 | /* |
4054 | * Check if we can regenerate the metadata for this session. | |
4055 | * Only kernel, UST per-uid and non-live sessions are supported. | |
4056 | * | |
4057 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
4058 | */ | |
4059 | static | |
eded6438 | 4060 | int check_regenerate_metadata_support(struct ltt_session *session) |
93ec662e JD |
4061 | { |
4062 | int ret; | |
4063 | ||
4064 | assert(session); | |
4065 | ||
4066 | if (session->live_timer != 0) { | |
4067 | ret = LTTNG_ERR_LIVE_SESSION; | |
4068 | goto end; | |
4069 | } | |
4070 | if (!session->active) { | |
4071 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4072 | goto end; | |
4073 | } | |
4074 | if (session->ust_session) { | |
4075 | switch (session->ust_session->buffer_type) { | |
4076 | case LTTNG_BUFFER_PER_UID: | |
4077 | break; | |
4078 | case LTTNG_BUFFER_PER_PID: | |
4079 | ret = LTTNG_ERR_PER_PID_SESSION; | |
4080 | goto end; | |
4081 | default: | |
4082 | assert(0); | |
4083 | ret = LTTNG_ERR_UNK; | |
4084 | goto end; | |
4085 | } | |
4086 | } | |
4087 | if (session->consumer->type == CONSUMER_DST_NET && | |
4088 | session->consumer->relay_minor_version < 8) { | |
4089 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; | |
4090 | goto end; | |
4091 | } | |
4092 | ret = 0; | |
4093 | ||
4094 | end: | |
4095 | return ret; | |
4096 | } | |
4097 | ||
7802bae3 LL |
4098 | static |
4099 | int clear_metadata_file(int fd) | |
4100 | { | |
4101 | int ret; | |
a5df8828 | 4102 | off_t lseek_ret; |
7802bae3 | 4103 | |
a5df8828 GL |
4104 | lseek_ret = lseek(fd, 0, SEEK_SET); |
4105 | if (lseek_ret < 0) { | |
7802bae3 | 4106 | PERROR("lseek"); |
a5df8828 | 4107 | ret = -1; |
7802bae3 LL |
4108 | goto end; |
4109 | } | |
4110 | ||
4111 | ret = ftruncate(fd, 0); | |
4112 | if (ret < 0) { | |
4113 | PERROR("ftruncate"); | |
4114 | goto end; | |
4115 | } | |
4116 | ||
4117 | end: | |
4118 | return ret; | |
4119 | } | |
4120 | ||
93ec662e | 4121 | static |
eded6438 | 4122 | int ust_regenerate_metadata(struct ltt_ust_session *usess) |
93ec662e JD |
4123 | { |
4124 | int ret = 0; | |
4125 | struct buffer_reg_uid *uid_reg = NULL; | |
4126 | struct buffer_reg_session *session_reg = NULL; | |
4127 | ||
4128 | rcu_read_lock(); | |
4129 | cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { | |
4130 | struct ust_registry_session *registry; | |
4131 | struct ust_registry_channel *chan; | |
4132 | struct lttng_ht_iter iter_chan; | |
4133 | ||
4134 | session_reg = uid_reg->registry; | |
4135 | registry = session_reg->reg.ust; | |
4136 | ||
4137 | pthread_mutex_lock(®istry->lock); | |
4138 | registry->metadata_len_sent = 0; | |
4139 | memset(registry->metadata, 0, registry->metadata_alloc_len); | |
4140 | registry->metadata_len = 0; | |
4141 | registry->metadata_version++; | |
7802bae3 LL |
4142 | if (registry->metadata_fd > 0) { |
4143 | /* Clear the metadata file's content. */ | |
4144 | ret = clear_metadata_file(registry->metadata_fd); | |
4145 | if (ret) { | |
4146 | pthread_mutex_unlock(®istry->lock); | |
4147 | goto end; | |
4148 | } | |
4149 | } | |
4150 | ||
93ec662e JD |
4151 | ret = ust_metadata_session_statedump(registry, NULL, |
4152 | registry->major, registry->minor); | |
4153 | if (ret) { | |
4154 | pthread_mutex_unlock(®istry->lock); | |
4155 | ERR("Failed to generate session metadata (err = %d)", | |
4156 | ret); | |
4157 | goto end; | |
4158 | } | |
4159 | cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, | |
4160 | chan, node.node) { | |
4161 | struct ust_registry_event *event; | |
4162 | struct lttng_ht_iter iter_event; | |
4163 | ||
4164 | ret = ust_metadata_channel_statedump(registry, chan); | |
4165 | if (ret) { | |
4166 | pthread_mutex_unlock(®istry->lock); | |
4167 | ERR("Failed to generate channel metadata " | |
4168 | "(err = %d)", ret); | |
4169 | goto end; | |
4170 | } | |
4171 | cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, | |
4172 | event, node.node) { | |
4173 | ret = ust_metadata_event_statedump(registry, | |
4174 | chan, event); | |
4175 | if (ret) { | |
4176 | pthread_mutex_unlock(®istry->lock); | |
4177 | ERR("Failed to generate event metadata " | |
4178 | "(err = %d)", ret); | |
4179 | goto end; | |
4180 | } | |
4181 | } | |
4182 | } | |
4183 | pthread_mutex_unlock(®istry->lock); | |
4184 | } | |
4185 | ||
4186 | end: | |
4187 | rcu_read_unlock(); | |
4188 | return ret; | |
4189 | } | |
4190 | ||
4191 | /* | |
eded6438 | 4192 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
4193 | * |
4194 | * Ask the consumer to truncate the existing metadata file(s) and | |
4195 | * then regenerate the metadata. Live and per-pid sessions are not | |
4196 | * supported and return an error. | |
4197 | * | |
4198 | * Return 0 on success or else a LTTNG_ERR code. | |
4199 | */ | |
eded6438 | 4200 | int cmd_regenerate_metadata(struct ltt_session *session) |
93ec662e JD |
4201 | { |
4202 | int ret; | |
4203 | ||
4204 | assert(session); | |
4205 | ||
eded6438 | 4206 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
4207 | if (ret) { |
4208 | goto end; | |
4209 | } | |
4210 | ||
4211 | if (session->kernel_session) { | |
eded6438 | 4212 | ret = kernctl_session_regenerate_metadata( |
93ec662e JD |
4213 | session->kernel_session->fd); |
4214 | if (ret < 0) { | |
4215 | ERR("Failed to regenerate the kernel metadata"); | |
4216 | goto end; | |
4217 | } | |
4218 | } | |
4219 | ||
4220 | if (session->ust_session) { | |
eded6438 | 4221 | ret = ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
4222 | if (ret < 0) { |
4223 | ERR("Failed to regenerate the UST metadata"); | |
4224 | goto end; | |
4225 | } | |
4226 | } | |
4227 | DBG("Cmd metadata regenerate for session %s", session->name); | |
4228 | ret = LTTNG_OK; | |
4229 | ||
4230 | end: | |
4231 | return ret; | |
4232 | } | |
4233 | ||
c2561365 JD |
4234 | /* |
4235 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
4236 | * | |
4237 | * Ask the tracer to regenerate a new statedump. | |
4238 | * | |
4239 | * Return 0 on success or else a LTTNG_ERR code. | |
4240 | */ | |
4241 | int cmd_regenerate_statedump(struct ltt_session *session) | |
4242 | { | |
4243 | int ret; | |
4244 | ||
4245 | assert(session); | |
4246 | ||
4247 | if (!session->active) { | |
4248 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4249 | goto end; | |
4250 | } | |
c2561365 JD |
4251 | |
4252 | if (session->kernel_session) { | |
4253 | ret = kernctl_session_regenerate_statedump( | |
4254 | session->kernel_session->fd); | |
4255 | /* | |
4256 | * Currently, the statedump in kernel can only fail if out | |
4257 | * of memory. | |
4258 | */ | |
4259 | if (ret < 0) { | |
4260 | if (ret == -ENOMEM) { | |
4261 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
4262 | } else { | |
4263 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4264 | } | |
4265 | ERR("Failed to regenerate the kernel statedump"); | |
4266 | goto end; | |
4267 | } | |
4268 | } | |
4269 | ||
4270 | if (session->ust_session) { | |
4271 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
4272 | /* | |
4273 | * Currently, the statedump in UST always returns 0. | |
4274 | */ | |
4275 | if (ret < 0) { | |
4276 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4277 | ERR("Failed to regenerate the UST statedump"); | |
4278 | goto end; | |
4279 | } | |
4280 | } | |
4281 | DBG("Cmd regenerate statedump for session %s", session->name); | |
4282 | ret = LTTNG_OK; | |
4283 | ||
4284 | end: | |
4285 | return ret; | |
4286 | } | |
4287 | ||
b0880ae5 JG |
4288 | int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock, |
4289 | struct notification_thread_handle *notification_thread) | |
4290 | { | |
4291 | int ret; | |
4292 | size_t trigger_len; | |
4293 | ssize_t sock_recv_len; | |
4294 | struct lttng_trigger *trigger = NULL; | |
4295 | struct lttng_buffer_view view; | |
4296 | struct lttng_dynamic_buffer trigger_buffer; | |
4297 | ||
4298 | lttng_dynamic_buffer_init(&trigger_buffer); | |
4299 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; | |
4300 | ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len); | |
4301 | if (ret) { | |
4302 | ret = LTTNG_ERR_NOMEM; | |
4303 | goto end; | |
4304 | } | |
4305 | ||
4306 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data, | |
4307 | trigger_len); | |
4308 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { | |
4309 | ERR("Failed to receive \"register trigger\" command payload"); | |
4310 | /* TODO: should this be a new error enum ? */ | |
4311 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4312 | goto end; | |
4313 | } | |
4314 | ||
4315 | view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1); | |
4316 | if (lttng_trigger_create_from_buffer(&view, &trigger) != | |
4317 | trigger_len) { | |
4318 | ERR("Invalid trigger payload received in \"register trigger\" command"); | |
4319 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4320 | goto end; | |
4321 | } | |
4322 | ||
4323 | ret = notification_thread_command_register_trigger(notification_thread, | |
4324 | trigger); | |
587f9fd0 JG |
4325 | /* Ownership of trigger was transferred. */ |
4326 | trigger = NULL; | |
b0880ae5 | 4327 | end: |
587f9fd0 | 4328 | lttng_trigger_destroy(trigger); |
b0880ae5 JG |
4329 | lttng_dynamic_buffer_reset(&trigger_buffer); |
4330 | return ret; | |
4331 | } | |
4332 | ||
4333 | int cmd_unregister_trigger(struct command_ctx *cmd_ctx, int sock, | |
4334 | struct notification_thread_handle *notification_thread) | |
4335 | { | |
4336 | int ret; | |
4337 | size_t trigger_len; | |
4338 | ssize_t sock_recv_len; | |
4339 | struct lttng_trigger *trigger = NULL; | |
4340 | struct lttng_buffer_view view; | |
4341 | struct lttng_dynamic_buffer trigger_buffer; | |
4342 | ||
4343 | lttng_dynamic_buffer_init(&trigger_buffer); | |
4344 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; | |
4345 | ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len); | |
4346 | if (ret) { | |
4347 | ret = LTTNG_ERR_NOMEM; | |
4348 | goto end; | |
4349 | } | |
4350 | ||
4351 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data, | |
4352 | trigger_len); | |
4353 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { | |
4354 | ERR("Failed to receive \"unregister trigger\" command payload"); | |
4355 | /* TODO: should this be a new error enum ? */ | |
4356 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4357 | goto end; | |
4358 | } | |
4359 | ||
4360 | view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1); | |
4361 | if (lttng_trigger_create_from_buffer(&view, &trigger) != | |
4362 | trigger_len) { | |
4363 | ERR("Invalid trigger payload received in \"unregister trigger\" command"); | |
4364 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4365 | goto end; | |
4366 | } | |
4367 | ||
4368 | ret = notification_thread_command_unregister_trigger(notification_thread, | |
4369 | trigger); | |
4370 | end: | |
587f9fd0 | 4371 | lttng_trigger_destroy(trigger); |
b0880ae5 JG |
4372 | lttng_dynamic_buffer_reset(&trigger_buffer); |
4373 | return ret; | |
4374 | } | |
4375 | ||
6dc3064a DG |
4376 | /* |
4377 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
4378 | * snapshot output is *not* set with a remote destination. | |
4379 | * | |
9a654598 | 4380 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4381 | */ |
9a654598 | 4382 | static enum lttng_error_code set_relayd_for_snapshot( |
348a81dc | 4383 | struct consumer_output *output, |
fb9a95c4 | 4384 | const struct ltt_session *session) |
6dc3064a | 4385 | { |
9a654598 | 4386 | enum lttng_error_code status = LTTNG_OK; |
6dc3064a DG |
4387 | struct lttng_ht_iter iter; |
4388 | struct consumer_socket *socket; | |
1e791a74 | 4389 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
6fa5fe7c | 4390 | const char *base_path; |
6dc3064a | 4391 | |
348a81dc | 4392 | assert(output); |
6dc3064a DG |
4393 | assert(session); |
4394 | ||
4395 | DBG2("Set relayd object from snapshot output"); | |
4396 | ||
1e791a74 | 4397 | if (session->current_trace_chunk) { |
348a81dc JG |
4398 | enum lttng_trace_chunk_status chunk_status = |
4399 | lttng_trace_chunk_get_id( | |
4400 | session->current_trace_chunk, | |
4401 | ¤t_chunk_id.value); | |
1e791a74 | 4402 | |
348a81dc | 4403 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) { |
1e791a74 JG |
4404 | current_chunk_id.is_set = true; |
4405 | } else { | |
4406 | ERR("Failed to get current trace chunk id"); | |
4407 | status = LTTNG_ERR_UNK; | |
4408 | goto error; | |
4409 | } | |
4410 | } | |
4411 | ||
6dc3064a | 4412 | /* Ignore if snapshot consumer output is not network. */ |
348a81dc | 4413 | if (output->type != CONSUMER_DST_NET) { |
6dc3064a DG |
4414 | goto error; |
4415 | } | |
4416 | ||
6fa5fe7c MD |
4417 | /* |
4418 | * The snapshot record URI base path overrides the session | |
4419 | * base path. | |
4420 | */ | |
4421 | if (output->dst.net.control.subdir[0] != '\0') { | |
4422 | base_path = output->dst.net.control.subdir; | |
4423 | } else { | |
4424 | base_path = session->base_path; | |
4425 | } | |
4426 | ||
6dc3064a DG |
4427 | /* |
4428 | * For each consumer socket, create and send the relayd object of the | |
4429 | * snapshot output. | |
4430 | */ | |
4431 | rcu_read_lock(); | |
348a81dc | 4432 | cds_lfht_for_each_entry(output->socks->ht, &iter.iter, |
5eecee74 | 4433 | socket, node.node) { |
ecd0f96d | 4434 | pthread_mutex_lock(socket->lock); |
9a654598 | 4435 | status = send_consumer_relayd_sockets(0, session->id, |
348a81dc | 4436 | output, socket, |
d3e2ba59 | 4437 | session->name, session->hostname, |
6fa5fe7c | 4438 | base_path, |
1e791a74 | 4439 | session->live_timer, |
db1da059 | 4440 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
4441 | session->creation_time, |
4442 | session->name_contains_creation_time); | |
ecd0f96d | 4443 | pthread_mutex_unlock(socket->lock); |
9a654598 | 4444 | if (status != LTTNG_OK) { |
6dc3064a DG |
4445 | rcu_read_unlock(); |
4446 | goto error; | |
4447 | } | |
4448 | } | |
4449 | rcu_read_unlock(); | |
4450 | ||
4451 | error: | |
9a654598 | 4452 | return status; |
6dc3064a DG |
4453 | } |
4454 | ||
4455 | /* | |
4456 | * Record a kernel snapshot. | |
4457 | * | |
fac41e72 | 4458 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4459 | */ |
fb9a95c4 JG |
4460 | static enum lttng_error_code record_kernel_snapshot( |
4461 | struct ltt_kernel_session *ksess, | |
348a81dc | 4462 | const struct consumer_output *output, |
fb9a95c4 | 4463 | const struct ltt_session *session, |
d07ceecd | 4464 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a | 4465 | { |
9a654598 | 4466 | enum lttng_error_code status; |
6dc3064a DG |
4467 | |
4468 | assert(ksess); | |
4469 | assert(output); | |
4470 | assert(session); | |
4471 | ||
348a81dc JG |
4472 | status = kernel_snapshot_record( |
4473 | ksess, output, wait, nb_packets_per_stream); | |
9a654598 | 4474 | return status; |
6dc3064a DG |
4475 | } |
4476 | ||
4477 | /* | |
4478 | * Record a UST snapshot. | |
4479 | * | |
9a654598 | 4480 | * Returns LTTNG_OK on success or a LTTNG_ERR error code. |
6dc3064a | 4481 | */ |
9a654598 | 4482 | static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess, |
348a81dc JG |
4483 | const struct consumer_output *output, |
4484 | const struct ltt_session *session, | |
4485 | int wait, uint64_t nb_packets_per_stream) | |
6dc3064a | 4486 | { |
9a654598 | 4487 | enum lttng_error_code status; |
6dc3064a DG |
4488 | |
4489 | assert(usess); | |
4490 | assert(output); | |
4491 | assert(session); | |
4492 | ||
348a81dc JG |
4493 | status = ust_app_snapshot_record( |
4494 | usess, output, wait, nb_packets_per_stream); | |
9a654598 | 4495 | return status; |
6dc3064a DG |
4496 | } |
4497 | ||
d07ceecd | 4498 | static |
fb9a95c4 JG |
4499 | uint64_t get_session_size_one_more_packet_per_stream( |
4500 | const struct ltt_session *session, uint64_t cur_nr_packets) | |
68808f4e | 4501 | { |
d07ceecd | 4502 | uint64_t tot_size = 0; |
68808f4e DG |
4503 | |
4504 | if (session->kernel_session) { | |
4505 | struct ltt_kernel_channel *chan; | |
fb9a95c4 JG |
4506 | const struct ltt_kernel_session *ksess = |
4507 | session->kernel_session; | |
68808f4e | 4508 | |
68808f4e | 4509 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
4510 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
4511 | /* | |
4512 | * Don't take channel into account if we | |
4513 | * already grab all its packets. | |
4514 | */ | |
4515 | continue; | |
68808f4e | 4516 | } |
d07ceecd MD |
4517 | tot_size += chan->channel->attr.subbuf_size |
4518 | * chan->stream_count; | |
68808f4e DG |
4519 | } |
4520 | } | |
4521 | ||
4522 | if (session->ust_session) { | |
fb9a95c4 | 4523 | const struct ltt_ust_session *usess = session->ust_session; |
68808f4e | 4524 | |
d07ceecd MD |
4525 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
4526 | cur_nr_packets); | |
68808f4e DG |
4527 | } |
4528 | ||
d07ceecd | 4529 | return tot_size; |
68808f4e DG |
4530 | } |
4531 | ||
5c786ded | 4532 | /* |
d07ceecd MD |
4533 | * Calculate the number of packets we can grab from each stream that |
4534 | * fits within the overall snapshot max size. | |
4535 | * | |
4536 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
4537 | * the number of packets per stream. | |
4538 | * | |
4539 | * TODO: this approach is not perfect: we consider the worse case | |
4540 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
4541 | * better if we do this calculation while we actually grab the packet | |
4542 | * content: we would know how much padding we don't actually store into | |
4543 | * the file. | |
4544 | * | |
4545 | * This algorithm is currently bounded by the number of packets per | |
4546 | * stream. | |
4547 | * | |
4548 | * Since we call this algorithm before actually grabbing the data, it's | |
4549 | * an approximation: for instance, applications could appear/disappear | |
4550 | * in between this call and actually grabbing data. | |
5c786ded | 4551 | */ |
d07ceecd | 4552 | static |
fb9a95c4 JG |
4553 | int64_t get_session_nb_packets_per_stream(const struct ltt_session *session, |
4554 | uint64_t max_size) | |
5c786ded | 4555 | { |
d07ceecd MD |
4556 | int64_t size_left; |
4557 | uint64_t cur_nb_packets = 0; | |
5c786ded | 4558 | |
d07ceecd MD |
4559 | if (!max_size) { |
4560 | return 0; /* Infinite */ | |
5c786ded JD |
4561 | } |
4562 | ||
d07ceecd MD |
4563 | size_left = max_size; |
4564 | for (;;) { | |
4565 | uint64_t one_more_packet_tot_size; | |
5c786ded | 4566 | |
fb9a95c4 JG |
4567 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream( |
4568 | session, cur_nb_packets); | |
d07ceecd MD |
4569 | if (!one_more_packet_tot_size) { |
4570 | /* We are already grabbing all packets. */ | |
4571 | break; | |
4572 | } | |
4573 | size_left -= one_more_packet_tot_size; | |
4574 | if (size_left < 0) { | |
4575 | break; | |
4576 | } | |
4577 | cur_nb_packets++; | |
5c786ded | 4578 | } |
d07ceecd MD |
4579 | if (!cur_nb_packets) { |
4580 | /* Not enough room to grab one packet of each stream, error. */ | |
4581 | return -1; | |
4582 | } | |
4583 | return cur_nb_packets; | |
5c786ded JD |
4584 | } |
4585 | ||
fb9a95c4 | 4586 | static |
d2956687 | 4587 | enum lttng_error_code snapshot_record(struct ltt_session *session, |
fb9a95c4 JG |
4588 | const struct snapshot_output *snapshot_output, int wait) |
4589 | { | |
4590 | int64_t nb_packets_per_stream; | |
d2956687 | 4591 | char snapshot_chunk_name[LTTNG_NAME_MAX]; |
348a81dc JG |
4592 | int ret; |
4593 | enum lttng_error_code ret_code = LTTNG_OK; | |
d2956687 | 4594 | struct lttng_trace_chunk *snapshot_trace_chunk; |
348a81dc JG |
4595 | struct consumer_output *original_ust_consumer_output = NULL; |
4596 | struct consumer_output *original_kernel_consumer_output = NULL; | |
4597 | struct consumer_output *snapshot_ust_consumer_output = NULL; | |
4598 | struct consumer_output *snapshot_kernel_consumer_output = NULL; | |
d2956687 | 4599 | |
348a81dc | 4600 | ret = snprintf(snapshot_chunk_name, sizeof(snapshot_chunk_name), |
d2956687 JG |
4601 | "%s-%s-%" PRIu64, |
4602 | snapshot_output->name, | |
4603 | snapshot_output->datetime, | |
4604 | snapshot_output->nb_snapshot); | |
348a81dc | 4605 | if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) { |
d2956687 | 4606 | ERR("Failed to format snapshot name"); |
348a81dc JG |
4607 | ret_code = LTTNG_ERR_INVALID; |
4608 | goto error; | |
d2956687 JG |
4609 | } |
4610 | DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"", | |
4611 | snapshot_output->name, session->name, | |
4612 | snapshot_chunk_name); | |
348a81dc JG |
4613 | if (!session->kernel_session && !session->ust_session) { |
4614 | ERR("Failed to record snapshot as no channels exist"); | |
4615 | ret_code = LTTNG_ERR_NO_CHANNEL; | |
4616 | goto error; | |
4617 | } | |
4618 | ||
4619 | if (session->kernel_session) { | |
4620 | original_kernel_consumer_output = | |
4621 | session->kernel_session->consumer; | |
4622 | snapshot_kernel_consumer_output = | |
4623 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4624 | strcpy(snapshot_kernel_consumer_output->chunk_path, |
4625 | snapshot_chunk_name); | |
348a81dc JG |
4626 | ret = consumer_copy_sockets(snapshot_kernel_consumer_output, |
4627 | original_kernel_consumer_output); | |
4628 | if (ret < 0) { | |
4629 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4630 | ret_code = LTTNG_ERR_NOMEM; | |
4631 | goto error; | |
4632 | } | |
4633 | ret_code = set_relayd_for_snapshot( | |
4634 | snapshot_kernel_consumer_output, session); | |
4635 | if (ret_code != LTTNG_OK) { | |
4636 | ERR("Failed to setup relay daemon for kernel tracer snapshot"); | |
4637 | goto error; | |
4638 | } | |
4639 | session->kernel_session->consumer = | |
4640 | snapshot_kernel_consumer_output; | |
4641 | } | |
4642 | if (session->ust_session) { | |
4643 | original_ust_consumer_output = session->ust_session->consumer; | |
4644 | snapshot_ust_consumer_output = | |
4645 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4646 | strcpy(snapshot_ust_consumer_output->chunk_path, |
4647 | snapshot_chunk_name); | |
348a81dc JG |
4648 | ret = consumer_copy_sockets(snapshot_ust_consumer_output, |
4649 | original_ust_consumer_output); | |
4650 | if (ret < 0) { | |
4651 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4652 | ret_code = LTTNG_ERR_NOMEM; | |
4653 | goto error; | |
4654 | } | |
4655 | ret_code = set_relayd_for_snapshot( | |
4656 | snapshot_ust_consumer_output, session); | |
4657 | if (ret_code != LTTNG_OK) { | |
4658 | ERR("Failed to setup relay daemon for userspace tracer snapshot"); | |
4659 | goto error; | |
4660 | } | |
4661 | session->ust_session->consumer = | |
4662 | snapshot_ust_consumer_output; | |
4663 | } | |
4664 | ||
d2956687 | 4665 | snapshot_trace_chunk = session_create_new_trace_chunk(session, |
348a81dc JG |
4666 | snapshot_kernel_consumer_output ?: |
4667 | snapshot_ust_consumer_output, | |
4668 | consumer_output_get_base_path( | |
4669 | snapshot_output->consumer), | |
d2956687 JG |
4670 | snapshot_chunk_name); |
4671 | if (!snapshot_trace_chunk) { | |
348a81dc JG |
4672 | ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"", |
4673 | session->name); | |
4674 | ret_code = LTTNG_ERR_CREATE_DIR_FAIL; | |
4675 | goto error; | |
d2956687 JG |
4676 | } |
4677 | assert(!session->current_trace_chunk); | |
4678 | ret = session_set_trace_chunk(session, snapshot_trace_chunk, NULL); | |
4679 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
4680 | snapshot_trace_chunk = NULL; | |
4681 | if (ret) { | |
348a81dc JG |
4682 | ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"", |
4683 | session->name); | |
4684 | ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
4685 | goto error; | |
d2956687 | 4686 | } |
fb9a95c4 JG |
4687 | |
4688 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
4689 | snapshot_output->max_size); | |
4690 | if (nb_packets_per_stream < 0) { | |
348a81dc JG |
4691 | ret_code = LTTNG_ERR_MAX_SIZE_INVALID; |
4692 | goto error; | |
fb9a95c4 JG |
4693 | } |
4694 | ||
4695 | if (session->kernel_session) { | |
348a81dc JG |
4696 | ret_code = record_kernel_snapshot(session->kernel_session, |
4697 | snapshot_kernel_consumer_output, session, | |
fb9a95c4 | 4698 | wait, nb_packets_per_stream); |
348a81dc JG |
4699 | if (ret_code != LTTNG_OK) { |
4700 | goto error; | |
fb9a95c4 JG |
4701 | } |
4702 | } | |
4703 | ||
4704 | if (session->ust_session) { | |
348a81dc JG |
4705 | ret_code = record_ust_snapshot(session->ust_session, |
4706 | snapshot_ust_consumer_output, session, | |
fb9a95c4 | 4707 | wait, nb_packets_per_stream); |
348a81dc JG |
4708 | if (ret_code != LTTNG_OK) { |
4709 | goto error; | |
fb9a95c4 JG |
4710 | } |
4711 | } | |
d2956687 | 4712 | |
343defc2 MD |
4713 | if (session_close_trace_chunk(session, session->current_trace_chunk, |
4714 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) { | |
d2956687 JG |
4715 | /* |
4716 | * Don't goto end; make sure the chunk is closed for the session | |
4717 | * to allow future snapshots. | |
4718 | */ | |
4719 | ERR("Failed to close snapshot trace chunk of session \"%s\"", | |
4720 | session->name); | |
348a81dc | 4721 | ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; |
d2956687 JG |
4722 | } |
4723 | if (session_set_trace_chunk(session, NULL, NULL)) { | |
4724 | ERR("Failed to release the current trace chunk of session \"%s\"", | |
4725 | session->name); | |
348a81dc | 4726 | ret_code = LTTNG_ERR_UNK; |
d2956687 | 4727 | } |
348a81dc JG |
4728 | error: |
4729 | if (original_ust_consumer_output) { | |
4730 | session->ust_session->consumer = original_ust_consumer_output; | |
4731 | } | |
4732 | if (original_kernel_consumer_output) { | |
4733 | session->kernel_session->consumer = | |
4734 | original_kernel_consumer_output; | |
4735 | } | |
4736 | consumer_output_put(snapshot_ust_consumer_output); | |
4737 | consumer_output_put(snapshot_kernel_consumer_output); | |
4738 | return ret_code; | |
fb9a95c4 JG |
4739 | } |
4740 | ||
6dc3064a DG |
4741 | /* |
4742 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
4743 | * | |
4744 | * The wait parameter is ignored so this call always wait for the snapshot to | |
4745 | * complete before returning. | |
4746 | * | |
4747 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4748 | */ | |
4749 | int cmd_snapshot_record(struct ltt_session *session, | |
df4f5a87 | 4750 | const struct lttng_snapshot_output *output, int wait) |
6dc3064a | 4751 | { |
9a654598 JG |
4752 | enum lttng_error_code cmd_ret = LTTNG_OK; |
4753 | int ret; | |
00e1dfc4 | 4754 | unsigned int snapshot_success = 0; |
10ba83fe | 4755 | char datetime[16]; |
2abe7969 | 4756 | struct snapshot_output *tmp_output = NULL; |
6dc3064a DG |
4757 | |
4758 | assert(session); | |
ba45d9f0 | 4759 | assert(output); |
6dc3064a DG |
4760 | |
4761 | DBG("Cmd snapshot record for session %s", session->name); | |
4762 | ||
10ba83fe JR |
4763 | /* Get the datetime for the snapshot output directory. */ |
4764 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
4765 | sizeof(datetime)); | |
4766 | if (!ret) { | |
9a654598 | 4767 | cmd_ret = LTTNG_ERR_INVALID; |
10ba83fe JR |
4768 | goto error; |
4769 | } | |
4770 | ||
6dc3064a | 4771 | /* |
d3f14b8a MD |
4772 | * Permission denied to create an output if the session is not |
4773 | * set in no output mode. | |
6dc3064a DG |
4774 | */ |
4775 | if (session->output_traces) { | |
9a654598 | 4776 | cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4777 | goto error; |
4778 | } | |
4779 | ||
4780 | /* The session needs to be started at least once. */ | |
8382cf6f | 4781 | if (!session->has_been_started) { |
9a654598 | 4782 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
6dc3064a DG |
4783 | goto error; |
4784 | } | |
4785 | ||
4786 | /* Use temporary output for the session. */ | |
ba45d9f0 | 4787 | if (*output->ctrl_url != '\0') { |
2abe7969 JG |
4788 | tmp_output = snapshot_output_alloc(); |
4789 | if (!tmp_output) { | |
4790 | cmd_ret = LTTNG_ERR_NOMEM; | |
4791 | goto error; | |
4792 | } | |
4793 | ||
b178f53e JG |
4794 | ret = snapshot_output_init(session, output->max_size, |
4795 | output->name, | |
4796 | output->ctrl_url, output->data_url, | |
4797 | session->consumer, | |
2abe7969 | 4798 | tmp_output, NULL); |
6dc3064a DG |
4799 | if (ret < 0) { |
4800 | if (ret == -ENOMEM) { | |
9a654598 | 4801 | cmd_ret = LTTNG_ERR_NOMEM; |
6dc3064a | 4802 | } else { |
9a654598 | 4803 | cmd_ret = LTTNG_ERR_INVALID; |
6dc3064a DG |
4804 | } |
4805 | goto error; | |
4806 | } | |
1bfe7328 | 4807 | /* Use the global session count for the temporary snapshot. */ |
2abe7969 | 4808 | tmp_output->nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe JR |
4809 | |
4810 | /* Use the global datetime */ | |
2abe7969 JG |
4811 | memcpy(tmp_output->datetime, datetime, sizeof(datetime)); |
4812 | cmd_ret = snapshot_record(session, tmp_output, wait); | |
fb9a95c4 | 4813 | if (cmd_ret != LTTNG_OK) { |
804c90a8 JR |
4814 | goto error; |
4815 | } | |
804c90a8 JR |
4816 | snapshot_success = 1; |
4817 | } else { | |
4818 | struct snapshot_output *sout; | |
4819 | struct lttng_ht_iter iter; | |
68808f4e | 4820 | |
804c90a8 JR |
4821 | rcu_read_lock(); |
4822 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
4823 | &iter.iter, sout, node.node) { | |
2abe7969 JG |
4824 | struct snapshot_output output_copy; |
4825 | ||
804c90a8 | 4826 | /* |
2abe7969 JG |
4827 | * Make a local copy of the output and override output |
4828 | * parameters with those provided as part of the | |
4829 | * command. | |
804c90a8 | 4830 | */ |
2abe7969 | 4831 | memcpy(&output_copy, sout, sizeof(output_copy)); |
1bfe7328 | 4832 | |
804c90a8 | 4833 | if (output->max_size != (uint64_t) -1ULL) { |
2abe7969 | 4834 | output_copy.max_size = output->max_size; |
6dc3064a | 4835 | } |
d07ceecd | 4836 | |
2abe7969 JG |
4837 | output_copy.nb_snapshot = session->snapshot.nb_snapshot; |
4838 | memcpy(output_copy.datetime, datetime, | |
4839 | sizeof(datetime)); | |
6dc3064a | 4840 | |
804c90a8 JR |
4841 | /* Use temporary name. */ |
4842 | if (*output->name != '\0') { | |
2abe7969 JG |
4843 | if (lttng_strncpy(output_copy.name, |
4844 | output->name, | |
4845 | sizeof(output_copy.name))) { | |
9a654598 | 4846 | cmd_ret = LTTNG_ERR_INVALID; |
cf3e357d MD |
4847 | rcu_read_unlock(); |
4848 | goto error; | |
4849 | } | |
804c90a8 | 4850 | } |
e1986656 | 4851 | |
2abe7969 | 4852 | cmd_ret = snapshot_record(session, &output_copy, wait); |
fb9a95c4 JG |
4853 | if (cmd_ret != LTTNG_OK) { |
4854 | rcu_read_unlock(); | |
4855 | goto error; | |
6dc3064a | 4856 | } |
804c90a8 | 4857 | snapshot_success = 1; |
6dc3064a | 4858 | } |
804c90a8 | 4859 | rcu_read_unlock(); |
6dc3064a DG |
4860 | } |
4861 | ||
1bfe7328 DG |
4862 | if (snapshot_success) { |
4863 | session->snapshot.nb_snapshot++; | |
b67578cb | 4864 | } else { |
9a654598 | 4865 | cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL; |
1bfe7328 DG |
4866 | } |
4867 | ||
6dc3064a | 4868 | error: |
2abe7969 JG |
4869 | if (tmp_output) { |
4870 | snapshot_output_destroy(tmp_output); | |
4871 | } | |
9a654598 | 4872 | return cmd_ret; |
6dc3064a DG |
4873 | } |
4874 | ||
d7ba1388 MD |
4875 | /* |
4876 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
4877 | */ | |
4878 | int cmd_set_session_shm_path(struct ltt_session *session, | |
4879 | const char *shm_path) | |
4880 | { | |
4881 | /* Safety net */ | |
4882 | assert(session); | |
4883 | ||
4884 | /* | |
4885 | * Can only set shm path before session is started. | |
4886 | */ | |
4887 | if (session->has_been_started) { | |
4888 | return LTTNG_ERR_SESSION_STARTED; | |
4889 | } | |
4890 | ||
4891 | strncpy(session->shm_path, shm_path, | |
4892 | sizeof(session->shm_path)); | |
4893 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
4894 | ||
4895 | return 0; | |
4896 | } | |
4897 | ||
5c408ad8 JD |
4898 | /* |
4899 | * Command LTTNG_ROTATE_SESSION from the lttng-ctl library. | |
4900 | * | |
4901 | * Ask the consumer to rotate the session output directory. | |
4902 | * The session lock must be held. | |
4903 | * | |
d5a1b7aa | 4904 | * Returns LTTNG_OK on success or else a negative LTTng error code. |
5c408ad8 JD |
4905 | */ |
4906 | int cmd_rotate_session(struct ltt_session *session, | |
7fdbed1c | 4907 | struct lttng_rotate_session_return *rotate_return, |
343defc2 MD |
4908 | bool quiet_rotation, |
4909 | enum lttng_trace_chunk_command_type command) | |
5c408ad8 JD |
4910 | { |
4911 | int ret; | |
d2956687 | 4912 | uint64_t ongoing_rotation_chunk_id; |
d5a1b7aa | 4913 | enum lttng_error_code cmd_ret = LTTNG_OK; |
d2956687 JG |
4914 | struct lttng_trace_chunk *chunk_being_archived = NULL; |
4915 | struct lttng_trace_chunk *new_trace_chunk = NULL; | |
4916 | enum lttng_trace_chunk_status chunk_status; | |
3156892b JG |
4917 | bool failed_to_rotate = false; |
4918 | enum lttng_error_code rotation_fail_code = LTTNG_OK; | |
5c408ad8 JD |
4919 | |
4920 | assert(session); | |
4921 | ||
4922 | if (!session->has_been_started) { | |
d5a1b7aa | 4923 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
d68c9a04 | 4924 | goto end; |
5c408ad8 JD |
4925 | } |
4926 | ||
d48d65e1 MD |
4927 | /* |
4928 | * Explicit rotation is not supported for live sessions. | |
4929 | * However, live sessions can perform a quiet rotation on | |
4930 | * destroy. | |
4931 | * Rotation is not supported for snapshot traces (no output). | |
4932 | */ | |
4933 | if ((!quiet_rotation && session->live_timer) || | |
4934 | !session->output_traces) { | |
d5a1b7aa | 4935 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
d68c9a04 | 4936 | goto end; |
5c408ad8 JD |
4937 | } |
4938 | ||
d2956687 | 4939 | /* Unsupported feature in lttng-relayd before 2.11. */ |
070b6a86 | 4940 | if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET && |
5c408ad8 JD |
4941 | (session->consumer->relay_major_version == 2 && |
4942 | session->consumer->relay_minor_version < 11)) { | |
d5a1b7aa | 4943 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY; |
d68c9a04 | 4944 | goto end; |
5c408ad8 JD |
4945 | } |
4946 | ||
a40a503f MD |
4947 | /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */ |
4948 | if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) { | |
4949 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL; | |
4950 | goto end; | |
4951 | } | |
4952 | ||
92816cc3 | 4953 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
92816cc3 JG |
4954 | DBG("Refusing to launch a rotation; a rotation is already in progress for session %s", |
4955 | session->name); | |
d5a1b7aa | 4956 | cmd_ret = LTTNG_ERR_ROTATION_PENDING; |
d68c9a04 | 4957 | goto end; |
5c408ad8 JD |
4958 | } |
4959 | ||
4960 | /* | |
4961 | * After a stop, we only allow one rotation to occur, the other ones are | |
4962 | * useless until a new start. | |
4963 | */ | |
4964 | if (session->rotated_after_last_stop) { | |
4965 | DBG("Session \"%s\" was already rotated after stop, refusing rotation", | |
4966 | session->name); | |
d5a1b7aa | 4967 | cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; |
d68c9a04 | 4968 | goto end; |
5c408ad8 | 4969 | } |
d2956687 | 4970 | if (session->active) { |
348a81dc | 4971 | new_trace_chunk = session_create_new_trace_chunk(session, NULL, |
d2956687 JG |
4972 | NULL, NULL); |
4973 | if (!new_trace_chunk) { | |
4974 | cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
4975 | goto error; | |
5c408ad8 | 4976 | } |
d2956687 | 4977 | } |
2961f09e | 4978 | |
3156892b JG |
4979 | /* |
4980 | * The current trace chunk becomes the chunk being archived. | |
4981 | * | |
4982 | * After this point, "chunk_being_archived" must absolutely | |
4983 | * be closed on the consumer(s), otherwise it will never be | |
4984 | * cleaned-up, which will result in a leak. | |
4985 | */ | |
d2956687 JG |
4986 | ret = session_set_trace_chunk(session, new_trace_chunk, |
4987 | &chunk_being_archived); | |
4988 | if (ret) { | |
4989 | cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
b178f53e JG |
4990 | goto error; |
4991 | } | |
4992 | ||
5c408ad8 | 4993 | if (session->kernel_session) { |
d5a1b7aa JG |
4994 | cmd_ret = kernel_rotate_session(session); |
4995 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
4996 | failed_to_rotate = true; |
4997 | rotation_fail_code = cmd_ret; | |
5c408ad8 JD |
4998 | } |
4999 | } | |
5000 | if (session->ust_session) { | |
d5a1b7aa JG |
5001 | cmd_ret = ust_app_rotate_session(session); |
5002 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5003 | failed_to_rotate = true; |
5004 | rotation_fail_code = cmd_ret; | |
5c408ad8 | 5005 | } |
92816cc3 | 5006 | } |
17dd1232 | 5007 | |
3b61d9ee JG |
5008 | if (!session->active) { |
5009 | session->rotated_after_last_stop = true; | |
5010 | } | |
5011 | ||
5012 | if (!chunk_being_archived) { | |
5013 | DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check", | |
5014 | session->name); | |
5015 | if (failed_to_rotate) { | |
5016 | cmd_ret = rotation_fail_code; | |
5017 | goto error; | |
5018 | } | |
5019 | cmd_ret = LTTNG_OK; | |
5020 | goto end; | |
5021 | } | |
5022 | ||
5023 | session->rotation_state = LTTNG_ROTATION_STATE_ONGOING; | |
5024 | chunk_status = lttng_trace_chunk_get_id(chunk_being_archived, | |
5025 | &ongoing_rotation_chunk_id); | |
5026 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5027 | ||
bbc4768c | 5028 | ret = session_close_trace_chunk(session, chunk_being_archived, |
343defc2 | 5029 | command, session->last_chunk_path); |
d2956687 JG |
5030 | if (ret) { |
5031 | cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; | |
5032 | goto error; | |
5033 | } | |
5034 | ||
3156892b JG |
5035 | if (failed_to_rotate) { |
5036 | cmd_ret = rotation_fail_code; | |
5037 | goto error; | |
5038 | } | |
5039 | ||
7fdbed1c | 5040 | session->quiet_rotation = quiet_rotation; |
92816cc3 JG |
5041 | ret = timer_session_rotation_pending_check_start(session, |
5042 | DEFAULT_ROTATE_PENDING_TIMER); | |
5043 | if (ret) { | |
d5a1b7aa | 5044 | cmd_ret = LTTNG_ERR_UNK; |
2961f09e | 5045 | goto error; |
5c408ad8 JD |
5046 | } |
5047 | ||
5c408ad8 | 5048 | if (rotate_return) { |
d2956687 | 5049 | rotate_return->rotation_id = ongoing_rotation_chunk_id; |
5c408ad8 JD |
5050 | } |
5051 | ||
d2956687 JG |
5052 | session->chunk_being_archived = chunk_being_archived; |
5053 | chunk_being_archived = NULL; | |
7fdbed1c JG |
5054 | if (!quiet_rotation) { |
5055 | ret = notification_thread_command_session_rotation_ongoing( | |
5056 | notification_thread_handle, | |
5057 | session->name, session->uid, session->gid, | |
5058 | ongoing_rotation_chunk_id); | |
5059 | if (ret != LTTNG_OK) { | |
5060 | ERR("Failed to notify notification thread that a session rotation is ongoing for session %s", | |
5061 | session->name); | |
5062 | cmd_ret = ret; | |
5063 | } | |
2961f09e JG |
5064 | } |
5065 | ||
92816cc3 | 5066 | DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent", |
d2956687 | 5067 | session->name, ongoing_rotation_chunk_id); |
5c408ad8 | 5068 | end: |
d2956687 JG |
5069 | lttng_trace_chunk_put(new_trace_chunk); |
5070 | lttng_trace_chunk_put(chunk_being_archived); | |
d5a1b7aa | 5071 | ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret); |
5c408ad8 | 5072 | return ret; |
2961f09e | 5073 | error: |
2961f09e | 5074 | if (session_reset_rotation_state(session, |
d2956687 | 5075 | LTTNG_ROTATION_STATE_ERROR)) { |
2961f09e JG |
5076 | ERR("Failed to reset rotation state of session \"%s\"", |
5077 | session->name); | |
5078 | } | |
5079 | goto end; | |
5c408ad8 JD |
5080 | } |
5081 | ||
5082 | /* | |
d68c9a04 | 5083 | * Command LTTNG_ROTATION_GET_INFO from the lttng-ctl library. |
5c408ad8 JD |
5084 | * |
5085 | * Check if the session has finished its rotation. | |
5086 | * | |
d2956687 | 5087 | * Return LTTNG_OK on success or else an LTTNG_ERR code. |
5c408ad8 | 5088 | */ |
d68c9a04 JD |
5089 | int cmd_rotate_get_info(struct ltt_session *session, |
5090 | struct lttng_rotation_get_info_return *info_return, | |
5091 | uint64_t rotation_id) | |
5c408ad8 | 5092 | { |
d2956687 JG |
5093 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5094 | enum lttng_rotation_state rotation_state; | |
5c408ad8 | 5095 | |
d68c9a04 | 5096 | DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, session->name, |
d2956687 | 5097 | session->most_recent_chunk_id.value); |
5c408ad8 | 5098 | |
d2956687 JG |
5099 | if (session->chunk_being_archived) { |
5100 | enum lttng_trace_chunk_status chunk_status; | |
5101 | uint64_t chunk_id; | |
5102 | ||
5103 | chunk_status = lttng_trace_chunk_get_id( | |
5104 | session->chunk_being_archived, | |
5105 | &chunk_id); | |
5106 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5107 | ||
5108 | rotation_state = rotation_id == chunk_id ? | |
5109 | LTTNG_ROTATION_STATE_ONGOING : | |
5110 | LTTNG_ROTATION_STATE_EXPIRED; | |
5111 | } else { | |
5112 | if (session->last_archived_chunk_id.is_set && | |
5113 | rotation_id != session->last_archived_chunk_id.value) { | |
5114 | rotation_state = LTTNG_ROTATION_STATE_EXPIRED; | |
5115 | } else { | |
5116 | rotation_state = session->rotation_state; | |
5117 | } | |
5c408ad8 JD |
5118 | } |
5119 | ||
d2956687 JG |
5120 | switch (rotation_state) { |
5121 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
83ed9e90 | 5122 | DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"", |
d2956687 JG |
5123 | session->name); |
5124 | goto end; | |
5125 | case LTTNG_ROTATION_STATE_EXPIRED: | |
5126 | DBG("Reporting that the rotation state of rotation id %" PRIu64 " of session \"%s\" has expired", | |
5127 | rotation_id, session->name); | |
5128 | break; | |
d68c9a04 | 5129 | case LTTNG_ROTATION_STATE_ONGOING: |
d2956687 | 5130 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending", |
d68c9a04 JD |
5131 | rotation_id, session->name); |
5132 | break; | |
5133 | case LTTNG_ROTATION_STATE_COMPLETED: | |
dd73d57b | 5134 | { |
d2956687 JG |
5135 | int fmt_ret; |
5136 | char *chunk_path; | |
dd73d57b JG |
5137 | char *current_tracing_path_reply; |
5138 | size_t current_tracing_path_reply_len; | |
5139 | ||
d2956687 JG |
5140 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed", |
5141 | rotation_id, session->name); | |
5142 | ||
dd73d57b JG |
5143 | switch (session_get_consumer_destination_type(session)) { |
5144 | case CONSUMER_DST_LOCAL: | |
5145 | current_tracing_path_reply = | |
5146 | info_return->location.local.absolute_path; | |
5147 | current_tracing_path_reply_len = | |
5148 | sizeof(info_return->location.local.absolute_path); | |
5149 | info_return->location_type = | |
05f8afa9 | 5150 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL; |
ecd1a12f MD |
5151 | fmt_ret = asprintf(&chunk_path, |
5152 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", | |
5153 | session_get_base_path(session), | |
5154 | session->last_archived_chunk_name); | |
5155 | if (fmt_ret == -1) { | |
5156 | PERROR("Failed to format the path of the last archived trace chunk"); | |
5157 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5158 | cmd_ret = LTTNG_ERR_UNK; | |
5159 | goto end; | |
5160 | } | |
dd73d57b JG |
5161 | break; |
5162 | case CONSUMER_DST_NET: | |
09cfbe47 JG |
5163 | { |
5164 | uint16_t ctrl_port, data_port; | |
5165 | ||
dd73d57b JG |
5166 | current_tracing_path_reply = |
5167 | info_return->location.relay.relative_path; | |
5168 | current_tracing_path_reply_len = | |
5169 | sizeof(info_return->location.relay.relative_path); | |
5170 | /* Currently the only supported relay protocol. */ | |
5171 | info_return->location.relay.protocol = | |
05f8afa9 | 5172 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP; |
dd73d57b | 5173 | |
d2956687 | 5174 | fmt_ret = lttng_strncpy(info_return->location.relay.host, |
dd73d57b JG |
5175 | session_get_net_consumer_hostname(session), |
5176 | sizeof(info_return->location.relay.host)); | |
d2956687 JG |
5177 | if (fmt_ret) { |
5178 | ERR("Failed to copy host name to rotate_get_info reply"); | |
dd73d57b | 5179 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5180 | cmd_ret = LTTNG_ERR_SET_URL; |
dd73d57b JG |
5181 | goto end; |
5182 | } | |
5183 | ||
09cfbe47 JG |
5184 | session_get_net_consumer_ports(session, &ctrl_port, &data_port); |
5185 | info_return->location.relay.ports.control = ctrl_port; | |
5186 | info_return->location.relay.ports.data = data_port; | |
dd73d57b | 5187 | info_return->location_type = |
05f8afa9 | 5188 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY; |
ecd1a12f MD |
5189 | chunk_path = strdup(session->last_chunk_path); |
5190 | if (!chunk_path) { | |
5191 | ERR("Failed to allocate the path of the last archived trace chunk"); | |
5192 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5193 | cmd_ret = LTTNG_ERR_UNK; | |
5194 | goto end; | |
5195 | } | |
dd73d57b | 5196 | break; |
09cfbe47 | 5197 | } |
dd73d57b JG |
5198 | default: |
5199 | abort(); | |
5200 | } | |
d2956687 JG |
5201 | |
5202 | fmt_ret = lttng_strncpy(current_tracing_path_reply, | |
5203 | chunk_path, current_tracing_path_reply_len); | |
5204 | free(chunk_path); | |
5205 | if (fmt_ret) { | |
5206 | ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply"); | |
d68c9a04 | 5207 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5208 | cmd_ret = LTTNG_ERR_UNK; |
5c408ad8 JD |
5209 | goto end; |
5210 | } | |
dd73d57b | 5211 | |
d68c9a04 | 5212 | break; |
dd73d57b | 5213 | } |
d68c9a04 | 5214 | case LTTNG_ROTATION_STATE_ERROR: |
d2956687 | 5215 | DBG("Reporting that an error occurred during rotation %" PRIu64 " of session \"%s\"", |
d68c9a04 JD |
5216 | rotation_id, session->name); |
5217 | break; | |
5218 | default: | |
5219 | abort(); | |
5c408ad8 JD |
5220 | } |
5221 | ||
d2956687 | 5222 | cmd_ret = LTTNG_OK; |
5c408ad8 | 5223 | end: |
d2956687 JG |
5224 | info_return->status = (int32_t) rotation_state; |
5225 | return cmd_ret; | |
5c408ad8 JD |
5226 | } |
5227 | ||
259c2674 JD |
5228 | /* |
5229 | * Command LTTNG_ROTATION_SET_SCHEDULE from the lttng-ctl library. | |
5230 | * | |
5231 | * Configure the automatic rotation parameters. | |
66ea93b1 JG |
5232 | * 'activate' to true means activate the rotation schedule type with 'new_value'. |
5233 | * 'activate' to false means deactivate the rotation schedule and validate that | |
5234 | * 'new_value' has the same value as the currently active value. | |
259c2674 | 5235 | * |
66ea93b1 | 5236 | * Return 0 on success or else a positive LTTNG_ERR code. |
259c2674 JD |
5237 | */ |
5238 | int cmd_rotation_set_schedule(struct ltt_session *session, | |
66ea93b1 JG |
5239 | bool activate, enum lttng_rotation_schedule_type schedule_type, |
5240 | uint64_t new_value, | |
90936dcf | 5241 | struct notification_thread_handle *notification_thread_handle) |
259c2674 JD |
5242 | { |
5243 | int ret; | |
66ea93b1 | 5244 | uint64_t *parameter_value; |
259c2674 JD |
5245 | |
5246 | assert(session); | |
5247 | ||
5248 | DBG("Cmd rotate set schedule session %s", session->name); | |
5249 | ||
92fe5ca1 | 5250 | if (session->live_timer || !session->output_traces) { |
66ea93b1 | 5251 | DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session"); |
259c2674 JD |
5252 | ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
5253 | goto end; | |
5254 | } | |
5255 | ||
66ea93b1 JG |
5256 | switch (schedule_type) { |
5257 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5258 | parameter_value = &session->rotate_size; | |
5259 | break; | |
5260 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5261 | parameter_value = &session->rotate_timer_period; | |
5262 | if (new_value >= UINT_MAX) { | |
5263 | DBG("Failing ROTATION_SET_SCHEDULE command as the value requested for a periodic rotation schedule is invalid: %" PRIu64 " > %u (UINT_MAX)", | |
5264 | new_value, UINT_MAX); | |
5265 | ret = LTTNG_ERR_INVALID; | |
5266 | goto end; | |
5267 | } | |
5268 | break; | |
5269 | default: | |
5270 | WARN("Failing ROTATION_SET_SCHEDULE command on unknown schedule type"); | |
5271 | ret = LTTNG_ERR_INVALID; | |
259c2674 | 5272 | goto end; |
66ea93b1 JG |
5273 | } |
5274 | ||
5275 | /* Improper use of the API. */ | |
5276 | if (new_value == -1ULL) { | |
5277 | WARN("Failing ROTATION_SET_SCHEDULE command as the value requested is -1"); | |
5278 | ret = LTTNG_ERR_INVALID; | |
259c2674 JD |
5279 | goto end; |
5280 | } | |
5281 | ||
66ea93b1 JG |
5282 | /* |
5283 | * As indicated in struct ltt_session's comments, a value of == 0 means | |
5284 | * this schedule rotation type is not in use. | |
5285 | * | |
5286 | * Reject the command if we were asked to activate a schedule that was | |
5287 | * already active. | |
5288 | */ | |
5289 | if (activate && *parameter_value != 0) { | |
5290 | DBG("Failing ROTATION_SET_SCHEDULE (activate) command as the schedule is already active"); | |
5291 | ret = LTTNG_ERR_ROTATION_SCHEDULE_SET; | |
90936dcf | 5292 | goto end; |
66ea93b1 JG |
5293 | } |
5294 | ||
5295 | /* | |
5296 | * Reject the command if we were asked to deactivate a schedule that was | |
5297 | * not active. | |
5298 | */ | |
5299 | if (!activate && *parameter_value == 0) { | |
5300 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as the schedule is already inactive"); | |
5301 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
90936dcf JD |
5302 | goto end; |
5303 | } | |
5304 | ||
66ea93b1 JG |
5305 | /* |
5306 | * Reject the command if we were asked to deactivate a schedule that | |
5307 | * doesn't exist. | |
5308 | */ | |
5309 | if (!activate && *parameter_value != new_value) { | |
5310 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as an inexistant schedule was provided"); | |
5311 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
5312 | goto end; | |
5313 | } | |
259c2674 | 5314 | |
66ea93b1 JG |
5315 | *parameter_value = activate ? new_value : 0; |
5316 | ||
5317 | switch (schedule_type) { | |
5318 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5319 | if (activate && session->active) { | |
5320 | /* | |
5321 | * Only start the timer if the session is active, | |
5322 | * otherwise it will be started when the session starts. | |
5323 | */ | |
92816cc3 JG |
5324 | ret = timer_session_rotation_schedule_timer_start( |
5325 | session, new_value); | |
259c2674 | 5326 | if (ret) { |
66ea93b1 | 5327 | ERR("Failed to enable session rotation timer in ROTATION_SET_SCHEDULE command"); |
259c2674 JD |
5328 | ret = LTTNG_ERR_UNK; |
5329 | goto end; | |
5330 | } | |
66ea93b1 | 5331 | } else { |
92816cc3 JG |
5332 | ret = timer_session_rotation_schedule_timer_stop( |
5333 | session); | |
66ea93b1 JG |
5334 | if (ret) { |
5335 | ERR("Failed to disable session rotation timer in ROTATION_SET_SCHEDULE command"); | |
5336 | ret = LTTNG_ERR_UNK; | |
f3ce6946 | 5337 | goto end; |
66ea93b1 | 5338 | } |
259c2674 | 5339 | } |
66ea93b1 JG |
5340 | break; |
5341 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5342 | if (activate) { | |
5343 | ret = subscribe_session_consumed_size_rotation(session, | |
5344 | new_value, notification_thread_handle); | |
90936dcf | 5345 | if (ret) { |
66ea93b1 | 5346 | ERR("Failed to enable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5347 | ret = LTTNG_ERR_UNK; |
5348 | goto end; | |
5349 | } | |
90936dcf | 5350 | } else { |
66ea93b1 JG |
5351 | ret = unsubscribe_session_consumed_size_rotation(session, |
5352 | notification_thread_handle); | |
90936dcf | 5353 | if (ret) { |
66ea93b1 | 5354 | ERR("Failed to disable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5355 | ret = LTTNG_ERR_UNK; |
5356 | goto end; | |
5357 | } | |
66ea93b1 | 5358 | |
90936dcf | 5359 | } |
66ea93b1 JG |
5360 | break; |
5361 | default: | |
5362 | /* Would have been caught before. */ | |
5363 | abort(); | |
90936dcf JD |
5364 | } |
5365 | ||
259c2674 JD |
5366 | ret = LTTNG_OK; |
5367 | ||
5368 | goto end; | |
5369 | ||
5370 | end: | |
5371 | return ret; | |
5372 | } | |
5373 | ||
a503e1ef JG |
5374 | /* Wait for a given path to be removed before continuing. */ |
5375 | static enum lttng_error_code wait_on_path(void *path_data) | |
5376 | { | |
5377 | const char *shm_path = path_data; | |
5378 | ||
5379 | DBG("Waiting for the shm path at %s to be removed before completing session destruction", | |
5380 | shm_path); | |
5381 | while (true) { | |
5382 | int ret; | |
5383 | struct stat st; | |
5384 | ||
5385 | ret = stat(shm_path, &st); | |
5386 | if (ret) { | |
5387 | if (errno != ENOENT) { | |
5388 | PERROR("stat() returned an error while checking for the existence of the shm path"); | |
5389 | } else { | |
5390 | DBG("shm path no longer exists, completing the destruction of session"); | |
5391 | } | |
5392 | break; | |
5393 | } else { | |
5394 | if (!S_ISDIR(st.st_mode)) { | |
5395 | ERR("The type of shm path %s returned by stat() is not a directory; aborting the wait for shm path removal", | |
5396 | shm_path); | |
5397 | break; | |
5398 | } | |
5399 | } | |
5400 | usleep(SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US); | |
5401 | } | |
5402 | return LTTNG_OK; | |
5403 | } | |
5404 | ||
5405 | /* | |
5406 | * Returns a pointer to a handler to run on completion of a command. | |
5407 | * Returns NULL if no handler has to be run for the last command executed. | |
5408 | */ | |
5409 | const struct cmd_completion_handler *cmd_pop_completion_handler(void) | |
5410 | { | |
5411 | struct cmd_completion_handler *handler = current_completion_handler; | |
5412 | ||
5413 | current_completion_handler = NULL; | |
5414 | return handler; | |
5415 | } | |
5416 | ||
2f77fc4b DG |
5417 | /* |
5418 | * Init command subsystem. | |
5419 | */ | |
5420 | void cmd_init(void) | |
5421 | { | |
5422 | /* | |
d88aee68 DG |
5423 | * Set network sequence index to 1 for streams to match a relayd |
5424 | * socket on the consumer side. | |
2f77fc4b | 5425 | */ |
d88aee68 DG |
5426 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
5427 | relayd_net_seq_idx = 1; | |
5428 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
5429 | |
5430 | DBG("Command subsystem initialized"); | |
5431 | } |