Commit | Line | Data |
---|---|---|
2f77fc4b | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2012 David Goulet <dgoulet@efficios.com> |
3 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
2f77fc4b | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: GPL-2.0-only |
2f77fc4b | 6 | * |
2f77fc4b DG |
7 | */ |
8 | ||
6c1c0768 | 9 | #define _LGPL_SOURCE |
2f77fc4b | 10 | #include <assert.h> |
6dc3064a | 11 | #include <inttypes.h> |
2f77fc4b DG |
12 | #include <urcu/list.h> |
13 | #include <urcu/uatomic.h> | |
a503e1ef | 14 | #include <sys/stat.h> |
d2956687 | 15 | #include <stdio.h> |
2f77fc4b DG |
16 | |
17 | #include <common/defaults.h> | |
18 | #include <common/common.h> | |
19 | #include <common/sessiond-comm/sessiond-comm.h> | |
20 | #include <common/relayd/relayd.h> | |
10a50311 | 21 | #include <common/utils.h> |
f5436bfc | 22 | #include <common/compat/string.h> |
93ec662e | 23 | #include <common/kernel-ctl/kernel-ctl.h> |
b0880ae5 JG |
24 | #include <common/dynamic-buffer.h> |
25 | #include <common/buffer-view.h> | |
9e620ea7 JG |
26 | #include <common/payload.h> |
27 | #include <common/payload-view.h> | |
82b69413 | 28 | #include <common/trace-chunk.h> |
3e3665b8 | 29 | #include <lttng/location-internal.h> |
b0880ae5 JG |
30 | #include <lttng/trigger/trigger-internal.h> |
31 | #include <lttng/condition/condition.h> | |
2463b787 JR |
32 | #include <lttng/condition/condition-internal.h> |
33 | #include <lttng/condition/event-rule.h> | |
34 | #include <lttng/condition/event-rule-internal.h> | |
35 | #include <lttng/event-rule/event-rule.h> | |
36 | #include <lttng/event-rule/event-rule-internal.h> | |
37 | #include <lttng/event-rule/uprobe-internal.h> | |
38 | #include <lttng/event-rule/tracepoint.h> | |
b0880ae5 | 39 | #include <lttng/action/action.h> |
6e21424e | 40 | #include <lttng/channel.h> |
b0880ae5 | 41 | #include <lttng/channel-internal.h> |
5c408ad8 | 42 | #include <lttng/rotate-internal.h> |
17dd1232 | 43 | #include <lttng/location-internal.h> |
b178f53e | 44 | #include <lttng/session-internal.h> |
3c02e545 | 45 | #include <lttng/userspace-probe-internal.h> |
b178f53e | 46 | #include <lttng/session-descriptor-internal.h> |
47aa1ca6 JG |
47 | #include <lttng/lttng-error.h> |
48 | #include <lttng/tracker.h> | |
9f449915 | 49 | #include <common/string-utils/string-utils.h> |
2f77fc4b DG |
50 | |
51 | #include "channel.h" | |
52 | #include "consumer.h" | |
53 | #include "event.h" | |
8782cc74 | 54 | #include "health-sessiond.h" |
2f77fc4b DG |
55 | #include "kernel.h" |
56 | #include "kernel-consumer.h" | |
57 | #include "lttng-sessiond.h" | |
58 | #include "utils.h" | |
0dbc2034 | 59 | #include "lttng-syscall.h" |
7c1d2758 | 60 | #include "agent.h" |
93ec662e | 61 | #include "buffer-registry.h" |
b0880ae5 JG |
62 | #include "notification-thread.h" |
63 | #include "notification-thread-commands.h" | |
5c408ad8 JD |
64 | #include "rotate.h" |
65 | #include "rotation-thread.h" | |
8e319828 | 66 | #include "timer.h" |
f28f9e44 | 67 | #include "agent-thread.h" |
47aa1ca6 | 68 | #include "tracker.h" |
2f77fc4b DG |
69 | |
70 | #include "cmd.h" | |
71 | ||
a503e1ef JG |
72 | /* Sleep for 100ms between each check for the shm path's deletion. */ |
73 | #define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000 | |
74 | ||
3e3665b8 JG |
75 | struct cmd_destroy_session_reply_context { |
76 | int reply_sock_fd; | |
77 | bool implicit_rotation_on_destroy; | |
3285a971 JG |
78 | /* |
79 | * Indicates whether or not an error occurred while launching the | |
80 | * destruction of a session. | |
81 | */ | |
82 | enum lttng_error_code destruction_status; | |
3e3665b8 JG |
83 | }; |
84 | ||
a503e1ef JG |
85 | static enum lttng_error_code wait_on_path(void *path); |
86 | ||
87 | /* | |
88 | * Command completion handler that is used by the destroy command | |
89 | * when a session that has a non-default shm_path is being destroyed. | |
90 | * | |
91 | * See comment in cmd_destroy_session() for the rationale. | |
92 | */ | |
93 | static struct destroy_completion_handler { | |
94 | struct cmd_completion_handler handler; | |
95 | char shm_path[member_sizeof(struct ltt_session, shm_path)]; | |
96 | } destroy_completion_handler = { | |
97 | .handler = { | |
98 | .run = wait_on_path, | |
99 | .data = destroy_completion_handler.shm_path | |
100 | }, | |
101 | .shm_path = { 0 }, | |
102 | }; | |
103 | ||
104 | static struct cmd_completion_handler *current_completion_handler; | |
105 | ||
2f77fc4b DG |
106 | /* |
107 | * Used to keep a unique index for each relayd socket created where this value | |
108 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
109 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
110 | * held. | |
2f77fc4b | 111 | */ |
d88aee68 DG |
112 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
113 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 114 | |
7076b56e JG |
115 | static int validate_ust_event_name(const char *); |
116 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 117 | const struct lttng_domain *domain, |
7076b56e JG |
118 | char *channel_name, struct lttng_event *event, |
119 | char *filter_expression, | |
2463b787 | 120 | struct lttng_bytecode *filter, |
7076b56e JG |
121 | struct lttng_event_exclusion *exclusion, |
122 | int wpipe); | |
123 | ||
2f77fc4b DG |
124 | /* |
125 | * Create a session path used by list_lttng_sessions for the case that the | |
126 | * session consumer is on the network. | |
127 | */ | |
128 | static int build_network_session_path(char *dst, size_t size, | |
129 | struct ltt_session *session) | |
130 | { | |
131 | int ret, kdata_port, udata_port; | |
132 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
133 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
134 | ||
135 | assert(session); | |
136 | assert(dst); | |
137 | ||
138 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
139 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
140 | ||
141 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
142 | ||
143 | if (session->kernel_session && session->kernel_session->consumer) { | |
144 | kuri = &session->kernel_session->consumer->dst.net.control; | |
145 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
146 | } | |
147 | ||
148 | if (session->ust_session && session->ust_session->consumer) { | |
149 | uuri = &session->ust_session->consumer->dst.net.control; | |
150 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
151 | } | |
152 | ||
153 | if (uuri == NULL && kuri == NULL) { | |
154 | uri = &session->consumer->dst.net.control; | |
155 | kdata_port = session->consumer->dst.net.data.port; | |
156 | } else if (kuri && uuri) { | |
157 | ret = uri_compare(kuri, uuri); | |
158 | if (ret) { | |
159 | /* Not Equal */ | |
160 | uri = kuri; | |
161 | /* Build uuri URL string */ | |
162 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
163 | if (ret < 0) { | |
164 | goto error; | |
165 | } | |
166 | } else { | |
167 | uri = kuri; | |
168 | } | |
169 | } else if (kuri && uuri == NULL) { | |
170 | uri = kuri; | |
171 | } else if (uuri && kuri == NULL) { | |
172 | uri = uuri; | |
173 | } | |
174 | ||
175 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
176 | if (ret < 0) { | |
177 | goto error; | |
178 | } | |
179 | ||
9aa9f900 DG |
180 | /* |
181 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
182 | * to print. | |
183 | */ | |
9d035200 | 184 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
185 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
186 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
187 | } else { | |
9aa9f900 | 188 | int dport; |
bef08707 | 189 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
190 | dport = kdata_port; |
191 | } else { | |
192 | /* No kernel URI, use the UST port. */ | |
193 | dport = udata_port; | |
194 | } | |
195 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
196 | } |
197 | ||
198 | error: | |
199 | return ret; | |
200 | } | |
201 | ||
fb83fe64 JD |
202 | /* |
203 | * Get run-time attributes if the session has been started (discarded events, | |
204 | * lost packets). | |
205 | */ | |
206 | static int get_kernel_runtime_stats(struct ltt_session *session, | |
207 | struct ltt_kernel_channel *kchan, uint64_t *discarded_events, | |
208 | uint64_t *lost_packets) | |
209 | { | |
210 | int ret; | |
211 | ||
212 | if (!session->has_been_started) { | |
213 | ret = 0; | |
214 | *discarded_events = 0; | |
215 | *lost_packets = 0; | |
216 | goto end; | |
217 | } | |
218 | ||
e1f3997a | 219 | ret = consumer_get_discarded_events(session->id, kchan->key, |
fb83fe64 JD |
220 | session->kernel_session->consumer, |
221 | discarded_events); | |
222 | if (ret < 0) { | |
223 | goto end; | |
224 | } | |
225 | ||
e1f3997a | 226 | ret = consumer_get_lost_packets(session->id, kchan->key, |
fb83fe64 JD |
227 | session->kernel_session->consumer, |
228 | lost_packets); | |
229 | if (ret < 0) { | |
230 | goto end; | |
231 | } | |
232 | ||
233 | end: | |
234 | return ret; | |
235 | } | |
236 | ||
237 | /* | |
238 | * Get run-time attributes if the session has been started (discarded events, | |
239 | * lost packets). | |
240 | */ | |
241 | static int get_ust_runtime_stats(struct ltt_session *session, | |
242 | struct ltt_ust_channel *uchan, uint64_t *discarded_events, | |
243 | uint64_t *lost_packets) | |
244 | { | |
245 | int ret; | |
246 | struct ltt_ust_session *usess; | |
247 | ||
a91c5803 JG |
248 | if (!discarded_events || !lost_packets) { |
249 | ret = -1; | |
250 | goto end; | |
251 | } | |
252 | ||
fb83fe64 | 253 | usess = session->ust_session; |
a905c624 JG |
254 | assert(discarded_events); |
255 | assert(lost_packets); | |
fb83fe64 JD |
256 | |
257 | if (!usess || !session->has_been_started) { | |
258 | *discarded_events = 0; | |
259 | *lost_packets = 0; | |
260 | ret = 0; | |
261 | goto end; | |
262 | } | |
263 | ||
264 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
265 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
266 | &usess->buffer_reg_uid_list, | |
267 | usess->consumer, uchan->id, | |
268 | uchan->attr.overwrite, | |
269 | discarded_events, | |
270 | lost_packets); | |
271 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { | |
272 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
273 | uchan, usess->consumer, | |
274 | uchan->attr.overwrite, | |
275 | discarded_events, | |
276 | lost_packets); | |
277 | if (ret < 0) { | |
278 | goto end; | |
279 | } | |
280 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
281 | *lost_packets += uchan->per_pid_closed_app_lost; | |
282 | } else { | |
283 | ERR("Unsupported buffer type"); | |
967bc289 | 284 | assert(0); |
fb83fe64 JD |
285 | ret = -1; |
286 | goto end; | |
287 | } | |
288 | ||
289 | end: | |
290 | return ret; | |
291 | } | |
292 | ||
2f77fc4b DG |
293 | /* |
294 | * Fill lttng_channel array of all channels. | |
295 | */ | |
d449df4a | 296 | static ssize_t list_lttng_channels(enum lttng_domain_type domain, |
fb83fe64 | 297 | struct ltt_session *session, struct lttng_channel *channels, |
cf0bcb51 | 298 | struct lttng_channel_extended *chan_exts) |
2f77fc4b | 299 | { |
d449df4a | 300 | int i = 0, ret = 0; |
2f77fc4b DG |
301 | struct ltt_kernel_channel *kchan; |
302 | ||
303 | DBG("Listing channels for session %s", session->name); | |
304 | ||
305 | switch (domain) { | |
306 | case LTTNG_DOMAIN_KERNEL: | |
307 | /* Kernel channels */ | |
308 | if (session->kernel_session != NULL) { | |
309 | cds_list_for_each_entry(kchan, | |
310 | &session->kernel_session->channel_list.head, list) { | |
fb83fe64 | 311 | uint64_t discarded_events, lost_packets; |
cf0bcb51 JG |
312 | struct lttng_channel_extended *extended; |
313 | ||
314 | extended = (struct lttng_channel_extended *) | |
315 | kchan->channel->attr.extended.ptr; | |
fb83fe64 JD |
316 | |
317 | ret = get_kernel_runtime_stats(session, kchan, | |
318 | &discarded_events, &lost_packets); | |
319 | if (ret < 0) { | |
320 | goto end; | |
321 | } | |
2f77fc4b DG |
322 | /* Copy lttng_channel struct to array */ |
323 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
324 | channels[i].enabled = kchan->enabled; | |
fb83fe64 JD |
325 | chan_exts[i].discarded_events = |
326 | discarded_events; | |
327 | chan_exts[i].lost_packets = lost_packets; | |
cf0bcb51 JG |
328 | chan_exts[i].monitor_timer_interval = |
329 | extended->monitor_timer_interval; | |
491d1539 | 330 | chan_exts[i].blocking_timeout = 0; |
2f77fc4b DG |
331 | i++; |
332 | } | |
333 | } | |
334 | break; | |
335 | case LTTNG_DOMAIN_UST: | |
336 | { | |
337 | struct lttng_ht_iter iter; | |
338 | struct ltt_ust_channel *uchan; | |
339 | ||
e7fe706f | 340 | rcu_read_lock(); |
2f77fc4b DG |
341 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
342 | &iter.iter, uchan, node.node) { | |
a91c5803 | 343 | uint64_t discarded_events = 0, lost_packets = 0; |
fb83fe64 | 344 | |
8ee609c8 MD |
345 | if (lttng_strncpy(channels[i].name, uchan->name, |
346 | LTTNG_SYMBOL_NAME_LEN)) { | |
347 | break; | |
348 | } | |
2f77fc4b DG |
349 | channels[i].attr.overwrite = uchan->attr.overwrite; |
350 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
351 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
352 | channels[i].attr.switch_timer_interval = | |
353 | uchan->attr.switch_timer_interval; | |
354 | channels[i].attr.read_timer_interval = | |
355 | uchan->attr.read_timer_interval; | |
356 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
357 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
358 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
5e4435a4 JG |
359 | |
360 | /* | |
361 | * Map enum lttng_ust_output to enum lttng_event_output. | |
362 | */ | |
2f77fc4b DG |
363 | switch (uchan->attr.output) { |
364 | case LTTNG_UST_MMAP: | |
2f77fc4b DG |
365 | channels[i].attr.output = LTTNG_EVENT_MMAP; |
366 | break; | |
5e4435a4 JG |
367 | default: |
368 | /* | |
369 | * LTTNG_UST_MMAP is the only supported UST | |
370 | * output mode. | |
371 | */ | |
372 | assert(0); | |
373 | break; | |
2f77fc4b | 374 | } |
fb83fe64 | 375 | |
d449df4a MD |
376 | chan_exts[i].monitor_timer_interval = |
377 | uchan->monitor_timer_interval; | |
491d1539 MD |
378 | chan_exts[i].blocking_timeout = |
379 | uchan->attr.u.s.blocking_timeout; | |
d449df4a | 380 | |
fb83fe64 JD |
381 | ret = get_ust_runtime_stats(session, uchan, |
382 | &discarded_events, &lost_packets); | |
383 | if (ret < 0) { | |
384 | break; | |
385 | } | |
386 | chan_exts[i].discarded_events = discarded_events; | |
387 | chan_exts[i].lost_packets = lost_packets; | |
2f77fc4b DG |
388 | i++; |
389 | } | |
e7fe706f | 390 | rcu_read_unlock(); |
2f77fc4b DG |
391 | break; |
392 | } | |
393 | default: | |
394 | break; | |
395 | } | |
fb83fe64 JD |
396 | |
397 | end: | |
d449df4a MD |
398 | if (ret < 0) { |
399 | return -LTTNG_ERR_FATAL; | |
400 | } else { | |
401 | return LTTNG_OK; | |
402 | } | |
2f77fc4b DG |
403 | } |
404 | ||
3c02e545 FD |
405 | static int append_extended_info(const char *filter_expression, |
406 | struct lttng_event_exclusion *exclusion, | |
407 | struct lttng_userspace_probe_location *probe_location, | |
e368fb43 | 408 | struct lttng_payload *payload) |
b4e3ceb9 | 409 | { |
3c02e545 | 410 | int ret = 0; |
b4e3ceb9 | 411 | size_t filter_len = 0; |
795d57ce | 412 | size_t nb_exclusions = 0; |
3c02e545 | 413 | size_t userspace_probe_location_len = 0; |
e368fb43 JG |
414 | struct lttcomm_event_extended_header extended_header = {}; |
415 | struct lttcomm_event_extended_header *p_extended_header; | |
416 | const size_t original_payload_size = payload->buffer.size; | |
417 | ||
418 | ret = lttng_dynamic_buffer_append(&payload->buffer, &extended_header, | |
419 | sizeof(extended_header)); | |
420 | if (ret) { | |
421 | goto end; | |
422 | } | |
b4e3ceb9 PP |
423 | |
424 | if (filter_expression) { | |
425 | filter_len = strlen(filter_expression) + 1; | |
e368fb43 JG |
426 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
427 | filter_expression, filter_len); | |
428 | if (ret) { | |
429 | goto end; | |
430 | } | |
b4e3ceb9 PP |
431 | } |
432 | ||
795d57ce | 433 | if (exclusion) { |
e368fb43 JG |
434 | const size_t len = exclusion->count * LTTNG_SYMBOL_NAME_LEN; |
435 | ||
795d57ce | 436 | nb_exclusions = exclusion->count; |
e368fb43 JG |
437 | |
438 | ret = lttng_dynamic_buffer_append( | |
439 | &payload->buffer, &exclusion->names, len); | |
440 | if (ret) { | |
441 | goto end; | |
442 | } | |
795d57ce PP |
443 | } |
444 | ||
3c02e545 | 445 | if (probe_location) { |
e368fb43 JG |
446 | const size_t size_before_probe = payload->buffer.size; |
447 | ||
3c02e545 | 448 | ret = lttng_userspace_probe_location_serialize(probe_location, |
e368fb43 | 449 | payload); |
3c02e545 FD |
450 | if (ret < 0) { |
451 | ret = -1; | |
452 | goto end; | |
453 | } | |
795d57ce | 454 | |
e368fb43 JG |
455 | userspace_probe_location_len = |
456 | payload->buffer.size - size_before_probe; | |
795d57ce PP |
457 | } |
458 | ||
e368fb43 JG |
459 | /* Set header fields */ |
460 | p_extended_header = (struct lttcomm_event_extended_header *) | |
461 | (payload->buffer.data + original_payload_size); | |
795d57ce | 462 | |
e368fb43 JG |
463 | p_extended_header->filter_len = filter_len; |
464 | p_extended_header->nb_exclusions = nb_exclusions; | |
465 | p_extended_header->userspace_probe_location_len = | |
466 | userspace_probe_location_len; | |
3c02e545 | 467 | |
3c02e545 FD |
468 | ret = 0; |
469 | end: | |
470 | return ret; | |
b4e3ceb9 PP |
471 | } |
472 | ||
3c6a091f | 473 | /* |
022d91ba | 474 | * Create a list of agent domain events. |
3c6a091f DG |
475 | * |
476 | * Return number of events in list on success or else a negative value. | |
477 | */ | |
022d91ba | 478 | static int list_lttng_agent_events(struct agent *agt, |
e368fb43 | 479 | struct lttng_payload *payload) |
3c6a091f | 480 | { |
e368fb43 JG |
481 | int nb_events = 0, ret = 0; |
482 | const struct agent_event *agent_event; | |
3c6a091f DG |
483 | struct lttng_ht_iter iter; |
484 | ||
022d91ba | 485 | assert(agt); |
3c6a091f | 486 | |
022d91ba | 487 | DBG3("Listing agent events"); |
3c6a091f | 488 | |
e5bbf678 | 489 | rcu_read_lock(); |
e368fb43 JG |
490 | cds_lfht_for_each_entry ( |
491 | agt->events->ht, &iter.iter, agent_event, node.node) { | |
492 | struct lttng_event event = { | |
493 | .enabled = agent_event->enabled, | |
494 | .loglevel = agent_event->loglevel_value, | |
495 | .loglevel_type = agent_event->loglevel_type, | |
496 | }; | |
497 | ||
498 | strncpy(event.name, agent_event->name, sizeof(event.name)); | |
499 | event.name[sizeof(event.name) - 1] = '\0'; | |
500 | ||
501 | ret = lttng_dynamic_buffer_append( | |
502 | &payload->buffer, &event, sizeof(event)); | |
3c02e545 | 503 | if (ret) { |
e368fb43 JG |
504 | ERR("Failed to append event to payload"); |
505 | ret = -LTTNG_ERR_NOMEM; | |
506 | goto end; | |
3c02e545 | 507 | } |
b4e3ceb9 | 508 | |
e368fb43 | 509 | nb_events++; |
3c6a091f DG |
510 | } |
511 | ||
e368fb43 JG |
512 | cds_lfht_for_each_entry ( |
513 | agt->events->ht, &iter.iter, agent_event, node.node) { | |
514 | /* Append extended info. */ | |
515 | ret = append_extended_info(agent_event->filter_expression, NULL, | |
516 | NULL, payload); | |
3c02e545 | 517 | if (ret) { |
e368fb43 JG |
518 | ERR("Failed to append extended event info to payload"); |
519 | ret = -LTTNG_ERR_NOMEM; | |
520 | goto end; | |
3c02e545 | 521 | } |
3c6a091f | 522 | } |
3c6a091f | 523 | |
e368fb43 | 524 | ret = nb_events; |
47e52862 | 525 | end: |
3c02e545 | 526 | rcu_read_unlock(); |
3c6a091f DG |
527 | return ret; |
528 | } | |
529 | ||
2f77fc4b DG |
530 | /* |
531 | * Create a list of ust global domain events. | |
532 | */ | |
533 | static int list_lttng_ust_global_events(char *channel_name, | |
b4e3ceb9 | 534 | struct ltt_ust_domain_global *ust_global, |
e368fb43 | 535 | struct lttng_payload *payload) |
2f77fc4b | 536 | { |
e368fb43 JG |
537 | int ret = 0; |
538 | unsigned int nb_events = 0; | |
2f77fc4b | 539 | struct lttng_ht_iter iter; |
e368fb43 JG |
540 | const struct lttng_ht_node_str *node; |
541 | const struct ltt_ust_channel *uchan; | |
542 | const struct ltt_ust_event *uevent; | |
2f77fc4b DG |
543 | |
544 | DBG("Listing UST global events for channel %s", channel_name); | |
545 | ||
546 | rcu_read_lock(); | |
547 | ||
e368fb43 | 548 | lttng_ht_lookup(ust_global->channels, (void *) channel_name, &iter); |
2f77fc4b DG |
549 | node = lttng_ht_iter_get_node_str(&iter); |
550 | if (node == NULL) { | |
f73fabfd | 551 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
d31d3e8c | 552 | goto end; |
2f77fc4b DG |
553 | } |
554 | ||
555 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
556 | ||
e368fb43 | 557 | DBG3("Listing UST global events"); |
2f77fc4b | 558 | |
b4e3ceb9 | 559 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
e368fb43 JG |
560 | struct lttng_event event = {}; |
561 | ||
b4e3ceb9 | 562 | if (uevent->internal) { |
b4e3ceb9 PP |
563 | continue; |
564 | } | |
565 | ||
e368fb43 JG |
566 | strncpy(event.name, uevent->attr.name, sizeof(event.name)); |
567 | event.name[sizeof(event.name) - 1] = '\0'; | |
2f77fc4b | 568 | |
e368fb43 | 569 | event.enabled = uevent->enabled; |
2f77fc4b DG |
570 | |
571 | switch (uevent->attr.instrumentation) { | |
572 | case LTTNG_UST_TRACEPOINT: | |
e368fb43 | 573 | event.type = LTTNG_EVENT_TRACEPOINT; |
2f77fc4b DG |
574 | break; |
575 | case LTTNG_UST_PROBE: | |
e368fb43 | 576 | event.type = LTTNG_EVENT_PROBE; |
2f77fc4b DG |
577 | break; |
578 | case LTTNG_UST_FUNCTION: | |
e368fb43 | 579 | event.type = LTTNG_EVENT_FUNCTION; |
2f77fc4b DG |
580 | break; |
581 | } | |
582 | ||
e368fb43 | 583 | event.loglevel = uevent->attr.loglevel; |
2f77fc4b DG |
584 | switch (uevent->attr.loglevel_type) { |
585 | case LTTNG_UST_LOGLEVEL_ALL: | |
e368fb43 | 586 | event.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
2f77fc4b DG |
587 | break; |
588 | case LTTNG_UST_LOGLEVEL_RANGE: | |
e368fb43 | 589 | event.loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
2f77fc4b DG |
590 | break; |
591 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
e368fb43 | 592 | event.loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
2f77fc4b DG |
593 | break; |
594 | } | |
e368fb43 | 595 | |
2f77fc4b | 596 | if (uevent->filter) { |
e368fb43 | 597 | event.filter = 1; |
2f77fc4b | 598 | } |
e368fb43 | 599 | |
4634f12e | 600 | if (uevent->exclusion) { |
e368fb43 JG |
601 | event.exclusion = 1; |
602 | } | |
603 | ||
604 | ret = lttng_dynamic_buffer_append(&payload->buffer, &event, sizeof(event)); | |
605 | if (ret) { | |
606 | ERR("Failed to append event to payload"); | |
607 | ret = -LTTNG_ERR_NOMEM; | |
608 | goto end; | |
4634f12e | 609 | } |
b4e3ceb9 | 610 | |
e368fb43 JG |
611 | nb_events++; |
612 | } | |
613 | ||
614 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
615 | /* Append extended info. */ | |
3c02e545 | 616 | ret = append_extended_info(uevent->filter_expression, |
e368fb43 | 617 | uevent->exclusion, NULL, payload); |
3c02e545 | 618 | if (ret) { |
e368fb43 | 619 | ERR("Failed to append extended event info to payload"); |
3c02e545 FD |
620 | ret = -LTTNG_ERR_FATAL; |
621 | goto end; | |
622 | } | |
2f77fc4b DG |
623 | } |
624 | ||
e368fb43 | 625 | ret = nb_events; |
d31d3e8c | 626 | end: |
2f77fc4b DG |
627 | rcu_read_unlock(); |
628 | return ret; | |
629 | } | |
630 | ||
631 | /* | |
632 | * Fill lttng_event array of all kernel events in the channel. | |
633 | */ | |
634 | static int list_lttng_kernel_events(char *channel_name, | |
b4e3ceb9 | 635 | struct ltt_kernel_session *kernel_session, |
e368fb43 | 636 | struct lttng_payload *payload) |
2f77fc4b | 637 | { |
e368fb43 | 638 | int ret; |
2f77fc4b | 639 | unsigned int nb_event; |
e368fb43 JG |
640 | const struct ltt_kernel_event *kevent; |
641 | const struct ltt_kernel_channel *kchan; | |
2f77fc4b DG |
642 | |
643 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
644 | if (kchan == NULL) { | |
f73fabfd | 645 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
646 | goto error; |
647 | } | |
648 | ||
649 | nb_event = kchan->event_count; | |
650 | ||
651 | DBG("Listing events for channel %s", kchan->channel->name); | |
652 | ||
e368fb43 JG |
653 | /* Kernel channels */ |
654 | cds_list_for_each_entry(kevent, &kchan->events_list.head , list) { | |
655 | struct lttng_event event = {}; | |
2f77fc4b | 656 | |
e368fb43 JG |
657 | strncpy(event.name, kevent->event->name, sizeof(event.name)); |
658 | event.name[sizeof(event.name) - 1] = '\0'; | |
659 | event.enabled = kevent->enabled; | |
660 | event.filter = (unsigned char) !!kevent->filter_expression; | |
b4e3ceb9 | 661 | |
e368fb43 | 662 | switch (kevent->event->instrumentation) { |
2f77fc4b | 663 | case LTTNG_KERNEL_TRACEPOINT: |
e368fb43 | 664 | event.type = LTTNG_EVENT_TRACEPOINT; |
2f77fc4b | 665 | break; |
2f77fc4b | 666 | case LTTNG_KERNEL_KRETPROBE: |
e368fb43 JG |
667 | event.type = LTTNG_EVENT_FUNCTION; |
668 | memcpy(&event.attr.probe, &kevent->event->u.kprobe, | |
1896972b DG |
669 | sizeof(struct lttng_kernel_kprobe)); |
670 | break; | |
671 | case LTTNG_KERNEL_KPROBE: | |
e368fb43 JG |
672 | event.type = LTTNG_EVENT_PROBE; |
673 | memcpy(&event.attr.probe, &kevent->event->u.kprobe, | |
2f77fc4b DG |
674 | sizeof(struct lttng_kernel_kprobe)); |
675 | break; | |
b955b4d4 | 676 | case LTTNG_KERNEL_UPROBE: |
e368fb43 | 677 | event.type = LTTNG_EVENT_USERSPACE_PROBE; |
b955b4d4 | 678 | break; |
2f77fc4b | 679 | case LTTNG_KERNEL_FUNCTION: |
e368fb43 JG |
680 | event.type = LTTNG_EVENT_FUNCTION; |
681 | memcpy(&event.attr.ftrace, &kevent->event->u.ftrace, | |
2f77fc4b DG |
682 | sizeof(struct lttng_kernel_function)); |
683 | break; | |
684 | case LTTNG_KERNEL_NOOP: | |
e368fb43 | 685 | event.type = LTTNG_EVENT_NOOP; |
2f77fc4b DG |
686 | break; |
687 | case LTTNG_KERNEL_SYSCALL: | |
e368fb43 | 688 | event.type = LTTNG_EVENT_SYSCALL; |
2f77fc4b DG |
689 | break; |
690 | case LTTNG_KERNEL_ALL: | |
1ab8c2ad FD |
691 | /* fall-through. */ |
692 | default: | |
2f77fc4b DG |
693 | assert(0); |
694 | break; | |
695 | } | |
b4e3ceb9 | 696 | |
e368fb43 JG |
697 | ret = lttng_dynamic_buffer_append( |
698 | &payload->buffer, &event, sizeof(event)); | |
699 | if (ret) { | |
700 | ERR("Failed to append event to payload"); | |
701 | ret = -LTTNG_ERR_NOMEM; | |
702 | goto end; | |
703 | } | |
704 | } | |
705 | ||
706 | cds_list_for_each_entry(kevent, &kchan->events_list.head , list) { | |
707 | /* Append extended info. */ | |
708 | ret = append_extended_info(kevent->filter_expression, NULL, | |
709 | kevent->userspace_probe_location, payload); | |
3c02e545 FD |
710 | if (ret) { |
711 | DBG("Error appending extended info message"); | |
712 | ret = -LTTNG_ERR_FATAL; | |
713 | goto error; | |
714 | } | |
2f77fc4b DG |
715 | } |
716 | ||
db906c12 | 717 | end: |
2f77fc4b | 718 | return nb_event; |
2f77fc4b | 719 | error: |
6314496f | 720 | return ret; |
2f77fc4b DG |
721 | } |
722 | ||
723 | /* | |
724 | * Add URI so the consumer output object. Set the correct path depending on the | |
725 | * domain adding the default trace directory. | |
726 | */ | |
b178f53e JG |
727 | static enum lttng_error_code add_uri_to_consumer( |
728 | const struct ltt_session *session, | |
729 | struct consumer_output *consumer, | |
730 | struct lttng_uri *uri, enum lttng_domain_type domain) | |
2f77fc4b | 731 | { |
b178f53e JG |
732 | int ret; |
733 | enum lttng_error_code ret_code = LTTNG_OK; | |
2f77fc4b DG |
734 | |
735 | assert(uri); | |
736 | ||
737 | if (consumer == NULL) { | |
738 | DBG("No consumer detected. Don't add URI. Stopping."); | |
b178f53e | 739 | ret_code = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
740 | goto error; |
741 | } | |
742 | ||
743 | switch (domain) { | |
744 | case LTTNG_DOMAIN_KERNEL: | |
b178f53e JG |
745 | ret = lttng_strncpy(consumer->domain_subdir, |
746 | DEFAULT_KERNEL_TRACE_DIR, | |
747 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
748 | break; |
749 | case LTTNG_DOMAIN_UST: | |
b178f53e JG |
750 | ret = lttng_strncpy(consumer->domain_subdir, |
751 | DEFAULT_UST_TRACE_DIR, | |
752 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
753 | break; |
754 | default: | |
755 | /* | |
b178f53e JG |
756 | * This case is possible is we try to add the URI to the global |
757 | * tracing session consumer object which in this case there is | |
758 | * no subdir. | |
2f77fc4b | 759 | */ |
b178f53e JG |
760 | memset(consumer->domain_subdir, 0, |
761 | sizeof(consumer->domain_subdir)); | |
762 | ret = 0; | |
763 | } | |
764 | if (ret) { | |
765 | ERR("Failed to initialize consumer output domain subdirectory"); | |
766 | ret_code = LTTNG_ERR_FATAL; | |
767 | goto error; | |
2f77fc4b DG |
768 | } |
769 | ||
770 | switch (uri->dtype) { | |
771 | case LTTNG_DST_IPV4: | |
772 | case LTTNG_DST_IPV6: | |
773 | DBG2("Setting network URI to consumer"); | |
774 | ||
df75acac DG |
775 | if (consumer->type == CONSUMER_DST_NET) { |
776 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
777 | consumer->dst.net.control_isset) || |
778 | (uri->stype == LTTNG_STREAM_DATA && | |
779 | consumer->dst.net.data_isset)) { | |
b178f53e | 780 | ret_code = LTTNG_ERR_URL_EXIST; |
df75acac DG |
781 | goto error; |
782 | } | |
783 | } else { | |
b178f53e | 784 | memset(&consumer->dst, 0, sizeof(consumer->dst)); |
785d2d0d DG |
785 | } |
786 | ||
2f77fc4b | 787 | /* Set URI into consumer output object */ |
b178f53e | 788 | ret = consumer_set_network_uri(session, consumer, uri); |
2f77fc4b | 789 | if (ret < 0) { |
b178f53e | 790 | ret_code = -ret; |
2f77fc4b DG |
791 | goto error; |
792 | } else if (ret == 1) { | |
793 | /* | |
794 | * URI was the same in the consumer so we do not append the subdir | |
795 | * again so to not duplicate output dir. | |
796 | */ | |
b178f53e | 797 | ret_code = LTTNG_OK; |
2f77fc4b DG |
798 | goto error; |
799 | } | |
2f77fc4b DG |
800 | break; |
801 | case LTTNG_DST_PATH: | |
b178f53e JG |
802 | if (*uri->dst.path != '/' || strstr(uri->dst.path, "../")) { |
803 | ret_code = LTTNG_ERR_INVALID; | |
9ac05d92 MD |
804 | goto error; |
805 | } | |
b178f53e JG |
806 | DBG2("Setting trace directory path from URI to %s", |
807 | uri->dst.path); | |
808 | memset(&consumer->dst, 0, sizeof(consumer->dst)); | |
809 | ||
810 | ret = lttng_strncpy(consumer->dst.session_root_path, | |
811 | uri->dst.path, | |
812 | sizeof(consumer->dst.session_root_path)); | |
4df41cad JG |
813 | if (ret) { |
814 | ret_code = LTTNG_ERR_FATAL; | |
815 | goto error; | |
816 | } | |
2f77fc4b DG |
817 | consumer->type = CONSUMER_DST_LOCAL; |
818 | break; | |
819 | } | |
820 | ||
b178f53e | 821 | ret_code = LTTNG_OK; |
2f77fc4b | 822 | error: |
b178f53e | 823 | return ret_code; |
2f77fc4b DG |
824 | } |
825 | ||
826 | /* | |
827 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
828 | */ | |
829 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
830 | { | |
831 | int ret = 0; | |
832 | struct lttng_ht_iter iter; | |
833 | struct consumer_socket *socket; | |
834 | ||
835 | assert(session); | |
836 | ||
e7fe706f DG |
837 | rcu_read_lock(); |
838 | ||
2f77fc4b DG |
839 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
840 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
841 | socket, node.node) { | |
2f77fc4b | 842 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 843 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
844 | pthread_mutex_unlock(socket->lock); |
845 | if (ret < 0) { | |
f73fabfd | 846 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
847 | goto error; |
848 | } | |
849 | } | |
850 | } | |
851 | ||
852 | error: | |
e7fe706f | 853 | rcu_read_unlock(); |
2f77fc4b DG |
854 | return ret; |
855 | } | |
856 | ||
857 | /* | |
858 | * Create a socket to the relayd using the URI. | |
859 | * | |
860 | * On success, the relayd_sock pointer is set to the created socket. | |
9a654598 | 861 | * Else, it remains untouched and an LTTng error code is returned. |
2f77fc4b | 862 | */ |
9a654598 | 863 | static enum lttng_error_code create_connect_relayd(struct lttng_uri *uri, |
b31610f2 JD |
864 | struct lttcomm_relayd_sock **relayd_sock, |
865 | struct consumer_output *consumer) | |
2f77fc4b DG |
866 | { |
867 | int ret; | |
9a654598 | 868 | enum lttng_error_code status = LTTNG_OK; |
6151a90f | 869 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 870 | |
6151a90f JD |
871 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
872 | RELAYD_VERSION_COMM_MINOR); | |
873 | if (!rsock) { | |
9a654598 | 874 | status = LTTNG_ERR_FATAL; |
2f77fc4b DG |
875 | goto error; |
876 | } | |
877 | ||
ffe60014 DG |
878 | /* |
879 | * Connect to relayd so we can proceed with a session creation. This call | |
880 | * can possibly block for an arbitrary amount of time to set the health | |
881 | * state to be in poll execution. | |
882 | */ | |
883 | health_poll_entry(); | |
6151a90f | 884 | ret = relayd_connect(rsock); |
ffe60014 | 885 | health_poll_exit(); |
2f77fc4b DG |
886 | if (ret < 0) { |
887 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 888 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
889 | goto free_sock; |
890 | } | |
891 | ||
892 | /* Create socket for control stream. */ | |
893 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
eacb7b6f MD |
894 | uint64_t result_flags; |
895 | ||
2f77fc4b DG |
896 | DBG3("Creating relayd stream socket from URI"); |
897 | ||
898 | /* Check relayd version */ | |
6151a90f | 899 | ret = relayd_version_check(rsock); |
67d5aa28 | 900 | if (ret == LTTNG_ERR_RELAYD_VERSION_FAIL) { |
9a654598 | 901 | status = LTTNG_ERR_RELAYD_VERSION_FAIL; |
67d5aa28 JD |
902 | goto close_sock; |
903 | } else if (ret < 0) { | |
904 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 905 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
906 | goto close_sock; |
907 | } | |
b31610f2 JD |
908 | consumer->relay_major_version = rsock->major; |
909 | consumer->relay_minor_version = rsock->minor; | |
eacb7b6f MD |
910 | ret = relayd_get_configuration(rsock, 0, |
911 | &result_flags); | |
912 | if (ret < 0) { | |
913 | ERR("Unable to get relayd configuration"); | |
914 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; | |
915 | goto close_sock; | |
916 | } | |
917 | if (result_flags & LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED) { | |
918 | consumer->relay_allows_clear = true; | |
919 | } | |
2f77fc4b DG |
920 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
921 | DBG3("Creating relayd data socket from URI"); | |
922 | } else { | |
923 | /* Command is not valid */ | |
924 | ERR("Relayd invalid stream type: %d", uri->stype); | |
9a654598 | 925 | status = LTTNG_ERR_INVALID; |
2f77fc4b DG |
926 | goto close_sock; |
927 | } | |
928 | ||
6151a90f | 929 | *relayd_sock = rsock; |
2f77fc4b | 930 | |
9a654598 | 931 | return status; |
2f77fc4b DG |
932 | |
933 | close_sock: | |
6151a90f JD |
934 | /* The returned value is not useful since we are on an error path. */ |
935 | (void) relayd_close(rsock); | |
2f77fc4b | 936 | free_sock: |
6151a90f | 937 | free(rsock); |
2f77fc4b | 938 | error: |
9a654598 | 939 | return status; |
2f77fc4b DG |
940 | } |
941 | ||
942 | /* | |
943 | * Connect to the relayd using URI and send the socket to the right consumer. | |
43fade62 JG |
944 | * |
945 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
946 | * |
947 | * Returns LTTNG_OK on success or an LTTng error code on failure. | |
2f77fc4b | 948 | */ |
9a654598 JG |
949 | static enum lttng_error_code send_consumer_relayd_socket( |
950 | unsigned int session_id, | |
3044f922 | 951 | struct lttng_uri *relayd_uri, |
56a37563 | 952 | struct consumer_output *consumer, |
d3e2ba59 | 953 | struct consumer_socket *consumer_sock, |
fb9a95c4 | 954 | const char *session_name, const char *hostname, |
6fa5fe7c | 955 | const char *base_path, int session_live_timer, |
0e270a1e | 956 | const uint64_t *current_chunk_id, |
46ef2188 MD |
957 | time_t session_creation_time, |
958 | bool session_name_contains_creation_time) | |
2f77fc4b DG |
959 | { |
960 | int ret; | |
6151a90f | 961 | struct lttcomm_relayd_sock *rsock = NULL; |
9a654598 | 962 | enum lttng_error_code status; |
2f77fc4b | 963 | |
ffe60014 | 964 | /* Connect to relayd and make version check if uri is the control. */ |
9a654598 JG |
965 | status = create_connect_relayd(relayd_uri, &rsock, consumer); |
966 | if (status != LTTNG_OK) { | |
9e218353 | 967 | goto relayd_comm_error; |
ffe60014 | 968 | } |
6151a90f | 969 | assert(rsock); |
ffe60014 | 970 | |
2f77fc4b | 971 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
972 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
973 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
974 | /* |
975 | * Increment net_seq_idx because we are about to transfer the | |
976 | * new relayd socket to the consumer. | |
d88aee68 | 977 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 978 | */ |
d88aee68 DG |
979 | consumer->net_seq_index = ++relayd_net_seq_idx; |
980 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
981 | } |
982 | ||
2f77fc4b | 983 | /* Send relayd socket to consumer. */ |
6151a90f | 984 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 | 985 | relayd_uri->stype, session_id, |
6fa5fe7c MD |
986 | session_name, hostname, base_path, |
987 | session_live_timer, current_chunk_id, | |
46ef2188 | 988 | session_creation_time, session_name_contains_creation_time); |
2f77fc4b | 989 | if (ret < 0) { |
9a654598 | 990 | status = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
991 | goto close_sock; |
992 | } | |
993 | ||
c890b720 DG |
994 | /* Flag that the corresponding socket was sent. */ |
995 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 996 | consumer_sock->control_sock_sent = 1; |
c890b720 | 997 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 998 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
999 | } |
1000 | ||
2f77fc4b DG |
1001 | /* |
1002 | * Close socket which was dup on the consumer side. The session daemon does | |
1003 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
1004 | */ | |
1005 | ||
1006 | close_sock: | |
9a654598 | 1007 | if (status != LTTNG_OK) { |
ffe60014 | 1008 | /* |
d9078d0c DG |
1009 | * The consumer output for this session should not be used anymore |
1010 | * since the relayd connection failed thus making any tracing or/and | |
1011 | * streaming not usable. | |
ffe60014 | 1012 | */ |
d9078d0c | 1013 | consumer->enabled = 0; |
ffe60014 | 1014 | } |
9e218353 JR |
1015 | (void) relayd_close(rsock); |
1016 | free(rsock); | |
1017 | ||
1018 | relayd_comm_error: | |
9a654598 | 1019 | return status; |
2f77fc4b DG |
1020 | } |
1021 | ||
1022 | /* | |
1023 | * Send both relayd sockets to a specific consumer and domain. This is a | |
1024 | * helper function to facilitate sending the information to the consumer for a | |
1025 | * session. | |
43fade62 JG |
1026 | * |
1027 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1028 | * |
1029 | * Returns LTTNG_OK, or an LTTng error code on failure. | |
2f77fc4b | 1030 | */ |
9a654598 JG |
1031 | static enum lttng_error_code send_consumer_relayd_sockets( |
1032 | enum lttng_domain_type domain, | |
56a37563 | 1033 | unsigned int session_id, struct consumer_output *consumer, |
fb9a95c4 | 1034 | struct consumer_socket *sock, const char *session_name, |
6fa5fe7c | 1035 | const char *hostname, const char *base_path, int session_live_timer, |
46ef2188 MD |
1036 | const uint64_t *current_chunk_id, time_t session_creation_time, |
1037 | bool session_name_contains_creation_time) | |
2f77fc4b | 1038 | { |
9a654598 | 1039 | enum lttng_error_code status = LTTNG_OK; |
2f77fc4b | 1040 | |
2f77fc4b | 1041 | assert(consumer); |
6dc3064a | 1042 | assert(sock); |
2f77fc4b | 1043 | |
2f77fc4b | 1044 | /* Sending control relayd socket. */ |
ffe60014 | 1045 | if (!sock->control_sock_sent) { |
9a654598 | 1046 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1047 | &consumer->dst.net.control, consumer, sock, |
6fa5fe7c | 1048 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1049 | current_chunk_id, session_creation_time, |
1050 | session_name_contains_creation_time); | |
9a654598 | 1051 | if (status != LTTNG_OK) { |
c890b720 DG |
1052 | goto error; |
1053 | } | |
2f77fc4b DG |
1054 | } |
1055 | ||
1056 | /* Sending data relayd socket. */ | |
ffe60014 | 1057 | if (!sock->data_sock_sent) { |
9a654598 | 1058 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1059 | &consumer->dst.net.data, consumer, sock, |
6fa5fe7c | 1060 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1061 | current_chunk_id, session_creation_time, |
1062 | session_name_contains_creation_time); | |
9a654598 | 1063 | if (status != LTTNG_OK) { |
c890b720 DG |
1064 | goto error; |
1065 | } | |
2f77fc4b DG |
1066 | } |
1067 | ||
2f77fc4b | 1068 | error: |
9a654598 | 1069 | return status; |
2f77fc4b DG |
1070 | } |
1071 | ||
1072 | /* | |
1073 | * Setup relayd connections for a tracing session. First creates the socket to | |
1074 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
1075 | * network. | |
1076 | */ | |
ffe60014 | 1077 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 1078 | { |
f73fabfd | 1079 | int ret = LTTNG_OK; |
2f77fc4b DG |
1080 | struct ltt_ust_session *usess; |
1081 | struct ltt_kernel_session *ksess; | |
1082 | struct consumer_socket *socket; | |
1083 | struct lttng_ht_iter iter; | |
0e270a1e | 1084 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
2f77fc4b | 1085 | |
0e270a1e | 1086 | assert(session); |
2f77fc4b DG |
1087 | |
1088 | usess = session->ust_session; | |
1089 | ksess = session->kernel_session; | |
1090 | ||
785d2d0d | 1091 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1092 | |
aa997ea3 | 1093 | rcu_read_lock(); |
1e791a74 JG |
1094 | if (session->current_trace_chunk) { |
1095 | enum lttng_trace_chunk_status status = lttng_trace_chunk_get_id( | |
1096 | session->current_trace_chunk, ¤t_chunk_id.value); | |
1097 | ||
1098 | if (status == LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1099 | current_chunk_id.is_set = true; | |
1100 | } else { | |
1101 | ERR("Failed to get current trace chunk id"); | |
1102 | ret = LTTNG_ERR_UNK; | |
1103 | goto error; | |
1104 | } | |
1105 | } | |
1106 | ||
2f77fc4b DG |
1107 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
1108 | && usess->consumer->enabled) { | |
1109 | /* For each consumer socket, send relayd sockets */ | |
1110 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
1111 | socket, node.node) { | |
2f77fc4b | 1112 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1113 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
1114 | usess->consumer, socket, |
1115 | session->name, session->hostname, | |
6fa5fe7c | 1116 | session->base_path, |
1e791a74 | 1117 | session->live_timer, |
db1da059 | 1118 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1119 | session->creation_time, |
1120 | session->name_contains_creation_time); | |
2f77fc4b | 1121 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1122 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1123 | goto error; |
1124 | } | |
6dc3064a DG |
1125 | /* Session is now ready for network streaming. */ |
1126 | session->net_handle = 1; | |
2f77fc4b | 1127 | } |
b31610f2 JD |
1128 | session->consumer->relay_major_version = |
1129 | usess->consumer->relay_major_version; | |
1130 | session->consumer->relay_minor_version = | |
1131 | usess->consumer->relay_minor_version; | |
eacb7b6f MD |
1132 | session->consumer->relay_allows_clear = |
1133 | usess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1134 | } |
1135 | ||
1136 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
1137 | && ksess->consumer->enabled) { | |
1138 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
1139 | socket, node.node) { | |
2f77fc4b | 1140 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1141 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
1142 | ksess->consumer, socket, |
1143 | session->name, session->hostname, | |
6fa5fe7c | 1144 | session->base_path, |
1e791a74 | 1145 | session->live_timer, |
db1da059 | 1146 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1147 | session->creation_time, |
1148 | session->name_contains_creation_time); | |
2f77fc4b | 1149 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1150 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1151 | goto error; |
1152 | } | |
6dc3064a DG |
1153 | /* Session is now ready for network streaming. */ |
1154 | session->net_handle = 1; | |
2f77fc4b | 1155 | } |
b31610f2 JD |
1156 | session->consumer->relay_major_version = |
1157 | ksess->consumer->relay_major_version; | |
1158 | session->consumer->relay_minor_version = | |
1159 | ksess->consumer->relay_minor_version; | |
eacb7b6f MD |
1160 | session->consumer->relay_allows_clear = |
1161 | ksess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1162 | } |
1163 | ||
1164 | error: | |
e7fe706f | 1165 | rcu_read_unlock(); |
2f77fc4b DG |
1166 | return ret; |
1167 | } | |
1168 | ||
9b6c7ec5 DG |
1169 | /* |
1170 | * Start a kernel session by opening all necessary streams. | |
1171 | */ | |
4dbe1875 | 1172 | int start_kernel_session(struct ltt_kernel_session *ksess) |
9b6c7ec5 DG |
1173 | { |
1174 | int ret; | |
1175 | struct ltt_kernel_channel *kchan; | |
1176 | ||
1177 | /* Open kernel metadata */ | |
07b86b52 | 1178 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
1179 | ret = kernel_open_metadata(ksess); |
1180 | if (ret < 0) { | |
1181 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1182 | goto error; | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | /* Open kernel metadata stream */ | |
07b86b52 | 1187 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1188 | ret = kernel_open_metadata_stream(ksess); |
1189 | if (ret < 0) { | |
1190 | ERR("Kernel create metadata stream failed"); | |
1191 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1192 | goto error; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | /* For each channel */ | |
1197 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1198 | if (kchan->stream_count == 0) { | |
1199 | ret = kernel_open_channel_stream(kchan); | |
1200 | if (ret < 0) { | |
1201 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1202 | goto error; | |
1203 | } | |
1204 | /* Update the stream global counter */ | |
1205 | ksess->stream_count_global += ret; | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | /* Setup kernel consumer socket and send fds to it */ | |
1210 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1211 | if (ret != 0) { |
9b6c7ec5 DG |
1212 | ret = LTTNG_ERR_KERN_START_FAIL; |
1213 | goto error; | |
1214 | } | |
1215 | ||
1216 | /* This start the kernel tracing */ | |
1217 | ret = kernel_start_session(ksess); | |
1218 | if (ret < 0) { | |
1219 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1220 | goto error; | |
1221 | } | |
1222 | ||
1223 | /* Quiescent wait after starting trace */ | |
7d268848 | 1224 | kernel_wait_quiescent(); |
9b6c7ec5 | 1225 | |
14fb1ebe | 1226 | ksess->active = 1; |
9b6c7ec5 DG |
1227 | |
1228 | ret = LTTNG_OK; | |
1229 | ||
1230 | error: | |
1231 | return ret; | |
1232 | } | |
1233 | ||
4dbe1875 MD |
1234 | int stop_kernel_session(struct ltt_kernel_session *ksess) |
1235 | { | |
1236 | struct ltt_kernel_channel *kchan; | |
1237 | bool error_occurred = false; | |
1238 | int ret; | |
1239 | ||
1240 | if (!ksess || !ksess->active) { | |
1241 | return LTTNG_OK; | |
1242 | } | |
1243 | DBG("Stopping kernel tracing"); | |
1244 | ||
1245 | ret = kernel_stop_session(ksess); | |
1246 | if (ret < 0) { | |
1247 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1248 | goto error; | |
1249 | } | |
1250 | ||
1251 | kernel_wait_quiescent(); | |
1252 | ||
1253 | /* Flush metadata after stopping (if exists) */ | |
1254 | if (ksess->metadata_stream_fd >= 0) { | |
1255 | ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd); | |
1256 | if (ret < 0) { | |
1257 | ERR("Kernel metadata flush failed"); | |
1258 | error_occurred = true; | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | /* Flush all buffers after stopping */ | |
1263 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1264 | ret = kernel_flush_buffer(kchan); | |
1265 | if (ret < 0) { | |
1266 | ERR("Kernel flush buffer error"); | |
1267 | error_occurred = true; | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | ksess->active = 0; | |
1272 | if (error_occurred) { | |
1273 | ret = LTTNG_ERR_UNK; | |
1274 | } else { | |
1275 | ret = LTTNG_OK; | |
1276 | } | |
1277 | error: | |
1278 | return ret; | |
1279 | } | |
1280 | ||
2f77fc4b DG |
1281 | /* |
1282 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1283 | */ | |
56a37563 JG |
1284 | int cmd_disable_channel(struct ltt_session *session, |
1285 | enum lttng_domain_type domain, char *channel_name) | |
2f77fc4b DG |
1286 | { |
1287 | int ret; | |
1288 | struct ltt_ust_session *usess; | |
1289 | ||
1290 | usess = session->ust_session; | |
1291 | ||
2223c96f DG |
1292 | rcu_read_lock(); |
1293 | ||
2f77fc4b DG |
1294 | switch (domain) { |
1295 | case LTTNG_DOMAIN_KERNEL: | |
1296 | { | |
1297 | ret = channel_kernel_disable(session->kernel_session, | |
1298 | channel_name); | |
f73fabfd | 1299 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1300 | goto error; |
1301 | } | |
1302 | ||
7d268848 | 1303 | kernel_wait_quiescent(); |
2f77fc4b DG |
1304 | break; |
1305 | } | |
1306 | case LTTNG_DOMAIN_UST: | |
1307 | { | |
1308 | struct ltt_ust_channel *uchan; | |
1309 | struct lttng_ht *chan_ht; | |
1310 | ||
1311 | chan_ht = usess->domain_global.channels; | |
1312 | ||
1313 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
1314 | if (uchan == NULL) { | |
f73fabfd | 1315 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1316 | goto error; |
1317 | } | |
1318 | ||
7972aab2 | 1319 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1320 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1321 | goto error; |
1322 | } | |
1323 | break; | |
1324 | } | |
2f77fc4b | 1325 | default: |
f73fabfd | 1326 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1327 | goto error; |
1328 | } | |
1329 | ||
f73fabfd | 1330 | ret = LTTNG_OK; |
2f77fc4b DG |
1331 | |
1332 | error: | |
2223c96f | 1333 | rcu_read_unlock(); |
2f77fc4b DG |
1334 | return ret; |
1335 | } | |
1336 | ||
1337 | /* | |
1338 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1339 | * | |
1340 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1341 | */ | |
1342 | int cmd_enable_channel(struct ltt_session *session, | |
df4f5a87 | 1343 | const struct lttng_domain *domain, const struct lttng_channel *_attr, int wpipe) |
2f77fc4b DG |
1344 | { |
1345 | int ret; | |
1346 | struct ltt_ust_session *usess = session->ust_session; | |
1347 | struct lttng_ht *chan_ht; | |
1f345e94 | 1348 | size_t len; |
df4f5a87 | 1349 | struct lttng_channel attr; |
2f77fc4b DG |
1350 | |
1351 | assert(session); | |
df4f5a87 | 1352 | assert(_attr); |
7972aab2 | 1353 | assert(domain); |
2f77fc4b | 1354 | |
df4f5a87 JG |
1355 | attr = *_attr; |
1356 | len = lttng_strnlen(attr.name, sizeof(attr.name)); | |
1f345e94 PP |
1357 | |
1358 | /* Validate channel name */ | |
df4f5a87 JG |
1359 | if (attr.name[0] == '.' || |
1360 | memchr(attr.name, '/', len) != NULL) { | |
1f345e94 PP |
1361 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; |
1362 | goto end; | |
1363 | } | |
1364 | ||
df4f5a87 | 1365 | DBG("Enabling channel %s for session %s", attr.name, session->name); |
2f77fc4b | 1366 | |
03b4fdcf DG |
1367 | rcu_read_lock(); |
1368 | ||
ecc48a90 JD |
1369 | /* |
1370 | * Don't try to enable a channel if the session has been started at | |
1371 | * some point in time before. The tracer does not allow it. | |
1372 | */ | |
8382cf6f | 1373 | if (session->has_been_started) { |
ecc48a90 JD |
1374 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1375 | goto error; | |
1376 | } | |
1377 | ||
1378 | /* | |
1379 | * If the session is a live session, remove the switch timer, the | |
1380 | * live timer does the same thing but sends also synchronisation | |
1381 | * beacons for inactive streams. | |
1382 | */ | |
1383 | if (session->live_timer > 0) { | |
df4f5a87 JG |
1384 | attr.attr.live_timer_interval = session->live_timer; |
1385 | attr.attr.switch_timer_interval = 0; | |
ecc48a90 JD |
1386 | } |
1387 | ||
6e21424e JR |
1388 | /* Check for feature support */ |
1389 | switch (domain->type) { | |
1390 | case LTTNG_DOMAIN_KERNEL: | |
1391 | { | |
7d268848 | 1392 | if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) { |
6e21424e JR |
1393 | /* Sampling position of buffer is not supported */ |
1394 | WARN("Kernel tracer does not support buffer monitoring. " | |
1395 | "Setting the monitor interval timer to 0 " | |
1396 | "(disabled) for channel '%s' of session '%s'", | |
df4f5a87 JG |
1397 | attr.name, session->name); |
1398 | lttng_channel_set_monitor_timer_interval(&attr, 0); | |
6e21424e JR |
1399 | } |
1400 | break; | |
1401 | } | |
1402 | case LTTNG_DOMAIN_UST: | |
f28f9e44 | 1403 | break; |
6e21424e JR |
1404 | case LTTNG_DOMAIN_JUL: |
1405 | case LTTNG_DOMAIN_LOG4J: | |
1406 | case LTTNG_DOMAIN_PYTHON: | |
f28f9e44 JG |
1407 | if (!agent_tracing_is_enabled()) { |
1408 | DBG("Attempted to enable a channel in an agent domain but the agent thread is not running"); | |
1409 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
1410 | goto error; | |
1411 | } | |
6e21424e JR |
1412 | break; |
1413 | default: | |
1414 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1415 | goto error; | |
1416 | } | |
1417 | ||
7972aab2 | 1418 | switch (domain->type) { |
2f77fc4b DG |
1419 | case LTTNG_DOMAIN_KERNEL: |
1420 | { | |
1421 | struct ltt_kernel_channel *kchan; | |
1422 | ||
df4f5a87 | 1423 | kchan = trace_kernel_get_channel_by_name(attr.name, |
2f77fc4b DG |
1424 | session->kernel_session); |
1425 | if (kchan == NULL) { | |
54213acc JG |
1426 | if (session->snapshot.nb_output > 0 || |
1427 | session->snapshot_mode) { | |
1428 | /* Enforce mmap output for snapshot sessions. */ | |
df4f5a87 | 1429 | attr.attr.output = LTTNG_EVENT_MMAP; |
54213acc | 1430 | } |
df4f5a87 JG |
1431 | ret = channel_kernel_create(session->kernel_session, &attr, wpipe); |
1432 | if (attr.name[0] != '\0') { | |
85076754 MD |
1433 | session->kernel_session->has_non_default_channel = 1; |
1434 | } | |
2f77fc4b DG |
1435 | } else { |
1436 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1437 | } | |
1438 | ||
f73fabfd | 1439 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1440 | goto error; |
1441 | } | |
1442 | ||
7d268848 | 1443 | kernel_wait_quiescent(); |
2f77fc4b DG |
1444 | break; |
1445 | } | |
1446 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1447 | case LTTNG_DOMAIN_JUL: |
1448 | case LTTNG_DOMAIN_LOG4J: | |
1449 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1450 | { |
1451 | struct ltt_ust_channel *uchan; | |
1452 | ||
9232818f JG |
1453 | /* |
1454 | * FIXME | |
1455 | * | |
1456 | * Current agent implementation limitations force us to allow | |
1457 | * only one channel at once in "agent" subdomains. Each | |
1458 | * subdomain has a default channel name which must be strictly | |
1459 | * adhered to. | |
1460 | */ | |
1461 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
df4f5a87 | 1462 | if (strncmp(attr.name, DEFAULT_JUL_CHANNEL_NAME, |
9232818f JG |
1463 | LTTNG_SYMBOL_NAME_LEN)) { |
1464 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1465 | goto error; | |
1466 | } | |
1467 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
df4f5a87 | 1468 | if (strncmp(attr.name, DEFAULT_LOG4J_CHANNEL_NAME, |
9232818f JG |
1469 | LTTNG_SYMBOL_NAME_LEN)) { |
1470 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1471 | goto error; | |
1472 | } | |
1473 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
df4f5a87 | 1474 | if (strncmp(attr.name, DEFAULT_PYTHON_CHANNEL_NAME, |
9232818f JG |
1475 | LTTNG_SYMBOL_NAME_LEN)) { |
1476 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1477 | goto error; | |
1478 | } | |
1479 | } | |
1480 | ||
2f77fc4b DG |
1481 | chan_ht = usess->domain_global.channels; |
1482 | ||
df4f5a87 | 1483 | uchan = trace_ust_find_channel_by_name(chan_ht, attr.name); |
2f77fc4b | 1484 | if (uchan == NULL) { |
df4f5a87 JG |
1485 | ret = channel_ust_create(usess, &attr, domain->buf_type); |
1486 | if (attr.name[0] != '\0') { | |
85076754 MD |
1487 | usess->has_non_default_channel = 1; |
1488 | } | |
2f77fc4b | 1489 | } else { |
7972aab2 | 1490 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1491 | } |
1492 | break; | |
1493 | } | |
2f77fc4b | 1494 | default: |
f73fabfd | 1495 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1496 | goto error; |
1497 | } | |
1498 | ||
df4f5a87 | 1499 | if (ret == LTTNG_OK && attr.attr.output != LTTNG_EVENT_MMAP) { |
54213acc JG |
1500 | session->has_non_mmap_channel = true; |
1501 | } | |
2f77fc4b | 1502 | error: |
2223c96f | 1503 | rcu_read_unlock(); |
1f345e94 | 1504 | end: |
2f77fc4b DG |
1505 | return ret; |
1506 | } | |
1507 | ||
159b042f JG |
1508 | enum lttng_error_code cmd_process_attr_tracker_get_tracking_policy( |
1509 | struct ltt_session *session, | |
1510 | enum lttng_domain_type domain, | |
1511 | enum lttng_process_attr process_attr, | |
1512 | enum lttng_tracking_policy *policy) | |
1513 | { | |
1514 | enum lttng_error_code ret_code = LTTNG_OK; | |
1515 | const struct process_attr_tracker *tracker; | |
1516 | ||
1517 | switch (domain) { | |
1518 | case LTTNG_DOMAIN_KERNEL: | |
1519 | if (!session->kernel_session) { | |
1520 | ret_code = LTTNG_ERR_INVALID; | |
1521 | goto end; | |
1522 | } | |
1523 | tracker = kernel_get_process_attr_tracker( | |
1524 | session->kernel_session, process_attr); | |
1525 | break; | |
1526 | case LTTNG_DOMAIN_UST: | |
1527 | if (!session->ust_session) { | |
1528 | ret_code = LTTNG_ERR_INVALID; | |
1529 | goto end; | |
1530 | } | |
1531 | tracker = trace_ust_get_process_attr_tracker( | |
1532 | session->ust_session, process_attr); | |
1533 | break; | |
1534 | default: | |
1535 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1536 | goto end; | |
1537 | } | |
1538 | if (tracker) { | |
1539 | *policy = process_attr_tracker_get_tracking_policy(tracker); | |
1540 | } else { | |
1541 | ret_code = LTTNG_ERR_INVALID; | |
1542 | } | |
1543 | end: | |
1544 | return ret_code; | |
1545 | } | |
1546 | ||
1547 | enum lttng_error_code cmd_process_attr_tracker_set_tracking_policy( | |
1548 | struct ltt_session *session, | |
1549 | enum lttng_domain_type domain, | |
1550 | enum lttng_process_attr process_attr, | |
1551 | enum lttng_tracking_policy policy) | |
1552 | { | |
1553 | enum lttng_error_code ret_code = LTTNG_OK; | |
1554 | ||
1555 | switch (policy) { | |
1556 | case LTTNG_TRACKING_POLICY_INCLUDE_SET: | |
1557 | case LTTNG_TRACKING_POLICY_EXCLUDE_ALL: | |
1558 | case LTTNG_TRACKING_POLICY_INCLUDE_ALL: | |
1559 | break; | |
1560 | default: | |
1561 | ret_code = LTTNG_ERR_INVALID; | |
1562 | goto end; | |
1563 | } | |
1564 | ||
1565 | switch (domain) { | |
1566 | case LTTNG_DOMAIN_KERNEL: | |
1567 | if (!session->kernel_session) { | |
1568 | ret_code = LTTNG_ERR_INVALID; | |
1569 | goto end; | |
1570 | } | |
1571 | ret_code = kernel_process_attr_tracker_set_tracking_policy( | |
1572 | session->kernel_session, process_attr, policy); | |
1573 | break; | |
1574 | case LTTNG_DOMAIN_UST: | |
1575 | if (!session->ust_session) { | |
1576 | ret_code = LTTNG_ERR_INVALID; | |
1577 | goto end; | |
1578 | } | |
1579 | ret_code = trace_ust_process_attr_tracker_set_tracking_policy( | |
1580 | session->ust_session, process_attr, policy); | |
1581 | break; | |
1582 | default: | |
1583 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1584 | break; | |
1585 | } | |
1586 | end: | |
1587 | return ret_code; | |
1588 | } | |
1589 | ||
1590 | enum lttng_error_code cmd_process_attr_tracker_inclusion_set_add_value( | |
1591 | struct ltt_session *session, | |
1592 | enum lttng_domain_type domain, | |
1593 | enum lttng_process_attr process_attr, | |
1594 | const struct process_attr_value *value) | |
1595 | { | |
1596 | enum lttng_error_code ret_code = LTTNG_OK; | |
1597 | ||
1598 | switch (domain) { | |
1599 | case LTTNG_DOMAIN_KERNEL: | |
1600 | if (!session->kernel_session) { | |
1601 | ret_code = LTTNG_ERR_INVALID; | |
1602 | goto end; | |
1603 | } | |
1604 | ret_code = kernel_process_attr_tracker_inclusion_set_add_value( | |
1605 | session->kernel_session, process_attr, value); | |
1606 | break; | |
1607 | case LTTNG_DOMAIN_UST: | |
1608 | if (!session->ust_session) { | |
1609 | ret_code = LTTNG_ERR_INVALID; | |
1610 | goto end; | |
1611 | } | |
1612 | ret_code = trace_ust_process_attr_tracker_inclusion_set_add_value( | |
1613 | session->ust_session, process_attr, value); | |
1614 | break; | |
1615 | default: | |
1616 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1617 | break; | |
1618 | } | |
1619 | end: | |
1620 | return ret_code; | |
1621 | } | |
1622 | ||
1623 | enum lttng_error_code cmd_process_attr_tracker_inclusion_set_remove_value( | |
1624 | struct ltt_session *session, | |
1625 | enum lttng_domain_type domain, | |
1626 | enum lttng_process_attr process_attr, | |
1627 | const struct process_attr_value *value) | |
1628 | { | |
1629 | enum lttng_error_code ret_code = LTTNG_OK; | |
1630 | ||
1631 | switch (domain) { | |
1632 | case LTTNG_DOMAIN_KERNEL: | |
1633 | if (!session->kernel_session) { | |
1634 | ret_code = LTTNG_ERR_INVALID; | |
1635 | goto end; | |
1636 | } | |
1637 | ret_code = kernel_process_attr_tracker_inclusion_set_remove_value( | |
1638 | session->kernel_session, process_attr, value); | |
1639 | break; | |
1640 | case LTTNG_DOMAIN_UST: | |
1641 | if (!session->ust_session) { | |
1642 | ret_code = LTTNG_ERR_INVALID; | |
1643 | goto end; | |
1644 | } | |
1645 | ret_code = trace_ust_process_attr_tracker_inclusion_set_remove_value( | |
1646 | session->ust_session, process_attr, value); | |
1647 | break; | |
1648 | default: | |
1649 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1650 | break; | |
1651 | } | |
1652 | end: | |
1653 | return ret_code; | |
1654 | } | |
1655 | ||
1656 | enum lttng_error_code cmd_process_attr_tracker_get_inclusion_set( | |
1657 | struct ltt_session *session, | |
1658 | enum lttng_domain_type domain, | |
1659 | enum lttng_process_attr process_attr, | |
1660 | struct lttng_process_attr_values **values) | |
1661 | { | |
1662 | enum lttng_error_code ret_code = LTTNG_OK; | |
1663 | const struct process_attr_tracker *tracker; | |
1664 | enum process_attr_tracker_status status; | |
1665 | ||
1666 | switch (domain) { | |
1667 | case LTTNG_DOMAIN_KERNEL: | |
1668 | if (!session->kernel_session) { | |
1669 | ret_code = LTTNG_ERR_INVALID; | |
1670 | goto end; | |
1671 | } | |
1672 | tracker = kernel_get_process_attr_tracker( | |
1673 | session->kernel_session, process_attr); | |
1674 | break; | |
1675 | case LTTNG_DOMAIN_UST: | |
1676 | if (!session->ust_session) { | |
1677 | ret_code = LTTNG_ERR_INVALID; | |
1678 | goto end; | |
1679 | } | |
1680 | tracker = trace_ust_get_process_attr_tracker( | |
1681 | session->ust_session, process_attr); | |
1682 | break; | |
1683 | default: | |
1684 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1685 | goto end; | |
1686 | } | |
1687 | ||
1688 | if (!tracker) { | |
1689 | ret_code = LTTNG_ERR_INVALID; | |
1690 | goto end; | |
1691 | } | |
1692 | ||
1693 | status = process_attr_tracker_get_inclusion_set(tracker, values); | |
1694 | switch (status) { | |
1695 | case PROCESS_ATTR_TRACKER_STATUS_OK: | |
1696 | ret_code = LTTNG_OK; | |
1697 | break; | |
1698 | case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY: | |
1699 | ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY; | |
1700 | break; | |
1701 | case PROCESS_ATTR_TRACKER_STATUS_ERROR: | |
1702 | ret_code = LTTNG_ERR_NOMEM; | |
1703 | break; | |
1704 | default: | |
1705 | ret_code = LTTNG_ERR_UNK; | |
1706 | break; | |
1707 | } | |
1708 | ||
1709 | end: | |
1710 | return ret_code; | |
1711 | } | |
1712 | ||
2f77fc4b DG |
1713 | /* |
1714 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1715 | */ | |
56a37563 | 1716 | int cmd_disable_event(struct ltt_session *session, |
df4f5a87 JG |
1717 | enum lttng_domain_type domain, const char *channel_name, |
1718 | const struct lttng_event *event) | |
2f77fc4b DG |
1719 | { |
1720 | int ret; | |
df4f5a87 | 1721 | const char *event_name; |
6e911cad | 1722 | |
18a720cd MD |
1723 | DBG("Disable event command for event \'%s\'", event->name); |
1724 | ||
6e911cad MD |
1725 | event_name = event->name; |
1726 | ||
9b7431cf JG |
1727 | /* Error out on unhandled search criteria */ |
1728 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad | 1729 | || event->pid || event->filter || event->exclusion) { |
7076b56e JG |
1730 | ret = LTTNG_ERR_UNK; |
1731 | goto error; | |
6e911cad | 1732 | } |
2f77fc4b | 1733 | |
2223c96f DG |
1734 | rcu_read_lock(); |
1735 | ||
2f77fc4b DG |
1736 | switch (domain) { |
1737 | case LTTNG_DOMAIN_KERNEL: | |
1738 | { | |
1739 | struct ltt_kernel_channel *kchan; | |
1740 | struct ltt_kernel_session *ksess; | |
1741 | ||
1742 | ksess = session->kernel_session; | |
1743 | ||
85076754 MD |
1744 | /* |
1745 | * If a non-default channel has been created in the | |
1746 | * session, explicitely require that -c chan_name needs | |
1747 | * to be provided. | |
1748 | */ | |
1749 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1750 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1751 | goto error_unlock; |
85076754 MD |
1752 | } |
1753 | ||
2f77fc4b DG |
1754 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1755 | if (kchan == NULL) { | |
f73fabfd | 1756 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1757 | goto error_unlock; |
2f77fc4b DG |
1758 | } |
1759 | ||
6e911cad MD |
1760 | switch (event->type) { |
1761 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1762 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1763 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1764 | case LTTNG_EVENT_PROBE: |
1765 | case LTTNG_EVENT_FUNCTION: | |
1766 | case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ | |
1767 | if (event_name[0] == '\0') { | |
1768 | ret = event_kernel_disable_event(kchan, | |
1769 | NULL, event->type); | |
29c62722 | 1770 | } else { |
d0ae4ea8 | 1771 | ret = event_kernel_disable_event(kchan, |
9550ee81 | 1772 | event_name, event->type); |
29c62722 | 1773 | } |
6e911cad | 1774 | if (ret != LTTNG_OK) { |
7076b56e | 1775 | goto error_unlock; |
6e911cad MD |
1776 | } |
1777 | break; | |
6e911cad MD |
1778 | default: |
1779 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1780 | goto error_unlock; |
2f77fc4b DG |
1781 | } |
1782 | ||
7d268848 | 1783 | kernel_wait_quiescent(); |
2f77fc4b DG |
1784 | break; |
1785 | } | |
1786 | case LTTNG_DOMAIN_UST: | |
1787 | { | |
1788 | struct ltt_ust_channel *uchan; | |
1789 | struct ltt_ust_session *usess; | |
1790 | ||
1791 | usess = session->ust_session; | |
1792 | ||
7076b56e JG |
1793 | if (validate_ust_event_name(event_name)) { |
1794 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1795 | goto error_unlock; | |
1796 | } | |
1797 | ||
85076754 MD |
1798 | /* |
1799 | * If a non-default channel has been created in the | |
9550ee81 | 1800 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1801 | * to be provided. |
1802 | */ | |
1803 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1804 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1805 | goto error_unlock; |
85076754 MD |
1806 | } |
1807 | ||
2f77fc4b DG |
1808 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1809 | channel_name); | |
1810 | if (uchan == NULL) { | |
f73fabfd | 1811 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1812 | goto error_unlock; |
2f77fc4b DG |
1813 | } |
1814 | ||
6e911cad MD |
1815 | switch (event->type) { |
1816 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1817 | /* |
1818 | * An empty event name means that everything | |
1819 | * should be disabled. | |
1820 | */ | |
1821 | if (event->name[0] == '\0') { | |
1822 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 JR |
1823 | } else { |
1824 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1825 | event_name); | |
1826 | } | |
6e911cad | 1827 | if (ret != LTTNG_OK) { |
7076b56e | 1828 | goto error_unlock; |
6e911cad MD |
1829 | } |
1830 | break; | |
1831 | default: | |
1832 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1833 | goto error_unlock; |
2f77fc4b DG |
1834 | } |
1835 | ||
1836 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1837 | channel_name); | |
1838 | break; | |
1839 | } | |
5cdb6027 | 1840 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1841 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1842 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1843 | { |
fefd409b | 1844 | struct agent *agt; |
f20baf8e DG |
1845 | struct ltt_ust_session *usess = session->ust_session; |
1846 | ||
1847 | assert(usess); | |
1848 | ||
6e911cad MD |
1849 | switch (event->type) { |
1850 | case LTTNG_EVENT_ALL: | |
1851 | break; | |
1852 | default: | |
1853 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1854 | goto error_unlock; |
6e911cad MD |
1855 | } |
1856 | ||
5cdb6027 | 1857 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1858 | if (!agt) { |
1859 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1860 | goto error_unlock; |
fefd409b | 1861 | } |
b3639870 JR |
1862 | /* |
1863 | * An empty event name means that everything | |
1864 | * should be disabled. | |
1865 | */ | |
1866 | if (event->name[0] == '\0') { | |
18a720cd MD |
1867 | ret = event_agent_disable_all(usess, agt); |
1868 | } else { | |
1869 | ret = event_agent_disable(usess, agt, event_name); | |
1870 | } | |
f20baf8e | 1871 | if (ret != LTTNG_OK) { |
7076b56e | 1872 | goto error_unlock; |
f20baf8e DG |
1873 | } |
1874 | ||
1875 | break; | |
1876 | } | |
2f77fc4b | 1877 | default: |
f73fabfd | 1878 | ret = LTTNG_ERR_UND; |
7076b56e | 1879 | goto error_unlock; |
2f77fc4b DG |
1880 | } |
1881 | ||
f73fabfd | 1882 | ret = LTTNG_OK; |
2f77fc4b | 1883 | |
7076b56e | 1884 | error_unlock: |
2223c96f | 1885 | rcu_read_unlock(); |
7076b56e | 1886 | error: |
2f77fc4b DG |
1887 | return ret; |
1888 | } | |
1889 | ||
2f77fc4b DG |
1890 | /* |
1891 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1892 | */ | |
56a37563 | 1893 | int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain, |
df4f5a87 | 1894 | char *channel_name, const struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1895 | { |
d5979e4a | 1896 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
bdf64013 JG |
1897 | char *app_ctx_provider_name = NULL, *app_ctx_name = NULL; |
1898 | ||
9a699f7b JR |
1899 | /* |
1900 | * Don't try to add a context if the session has been started at | |
1901 | * some point in time before. The tracer does not allow it and would | |
1902 | * result in a corrupted trace. | |
1903 | */ | |
1904 | if (session->has_been_started) { | |
1905 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
1906 | goto end; | |
1907 | } | |
1908 | ||
bdf64013 JG |
1909 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
1910 | app_ctx_provider_name = ctx->u.app_ctx.provider_name; | |
1911 | app_ctx_name = ctx->u.app_ctx.ctx_name; | |
1912 | } | |
2f77fc4b DG |
1913 | |
1914 | switch (domain) { | |
1915 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1916 | assert(session->kernel_session); |
1917 | ||
1918 | if (session->kernel_session->channel_count == 0) { | |
1919 | /* Create default channel */ | |
1920 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1921 | if (ret != LTTNG_OK) { | |
1922 | goto error; | |
1923 | } | |
d5979e4a | 1924 | chan_kern_created = 1; |
979e618e | 1925 | } |
2f77fc4b | 1926 | /* Add kernel context to kernel tracer */ |
601d5acf | 1927 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1928 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1929 | goto error; |
1930 | } | |
1931 | break; | |
bdf64013 JG |
1932 | case LTTNG_DOMAIN_JUL: |
1933 | case LTTNG_DOMAIN_LOG4J: | |
1934 | { | |
1935 | /* | |
1936 | * Validate channel name. | |
1937 | * If no channel name is given and the domain is JUL or LOG4J, | |
1938 | * set it to the appropriate domain-specific channel name. If | |
1939 | * a name is provided but does not match the expexted channel | |
1940 | * name, return an error. | |
1941 | */ | |
1942 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
1943 | strcmp(channel_name, | |
1944 | DEFAULT_JUL_CHANNEL_NAME)) { | |
1945 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1946 | goto error; | |
1947 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
1948 | strcmp(channel_name, | |
1949 | DEFAULT_LOG4J_CHANNEL_NAME)) { | |
1950 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1951 | goto error; | |
1952 | } | |
a93b3916 | 1953 | /* break is _not_ missing here. */ |
bdf64013 | 1954 | } |
2f77fc4b DG |
1955 | case LTTNG_DOMAIN_UST: |
1956 | { | |
1957 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1958 | unsigned int chan_count; |
1959 | ||
2f77fc4b DG |
1960 | assert(usess); |
1961 | ||
85076754 | 1962 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1963 | if (chan_count == 0) { |
1964 | struct lttng_channel *attr; | |
1965 | /* Create default channel */ | |
0a9c6494 | 1966 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1967 | if (attr == NULL) { |
1968 | ret = LTTNG_ERR_FATAL; | |
1969 | goto error; | |
1970 | } | |
1971 | ||
7972aab2 | 1972 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1973 | if (ret != LTTNG_OK) { |
1974 | free(attr); | |
1975 | goto error; | |
1976 | } | |
cf0bcb51 | 1977 | channel_attr_destroy(attr); |
d5979e4a | 1978 | chan_ust_created = 1; |
979e618e DG |
1979 | } |
1980 | ||
601d5acf | 1981 | ret = context_ust_add(usess, domain, ctx, channel_name); |
bdf64013 JG |
1982 | free(app_ctx_provider_name); |
1983 | free(app_ctx_name); | |
1984 | app_ctx_name = NULL; | |
1985 | app_ctx_provider_name = NULL; | |
f73fabfd | 1986 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1987 | goto error; |
1988 | } | |
1989 | break; | |
1990 | } | |
2f77fc4b | 1991 | default: |
f73fabfd | 1992 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1993 | goto error; |
1994 | } | |
1995 | ||
bdf64013 JG |
1996 | ret = LTTNG_OK; |
1997 | goto end; | |
2f77fc4b DG |
1998 | |
1999 | error: | |
d5979e4a DG |
2000 | if (chan_kern_created) { |
2001 | struct ltt_kernel_channel *kchan = | |
2002 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
2003 | session->kernel_session); | |
2004 | /* Created previously, this should NOT fail. */ | |
2005 | assert(kchan); | |
2006 | kernel_destroy_channel(kchan); | |
2007 | } | |
2008 | ||
2009 | if (chan_ust_created) { | |
2010 | struct ltt_ust_channel *uchan = | |
2011 | trace_ust_find_channel_by_name( | |
2012 | session->ust_session->domain_global.channels, | |
2013 | DEFAULT_CHANNEL_NAME); | |
2014 | /* Created previously, this should NOT fail. */ | |
2015 | assert(uchan); | |
2016 | /* Remove from the channel list of the session. */ | |
2017 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
2018 | uchan); | |
2019 | trace_ust_destroy_channel(uchan); | |
2020 | } | |
bdf64013 JG |
2021 | end: |
2022 | free(app_ctx_provider_name); | |
2023 | free(app_ctx_name); | |
2f77fc4b DG |
2024 | return ret; |
2025 | } | |
2026 | ||
dac8e046 JG |
2027 | static inline bool name_starts_with(const char *name, const char *prefix) |
2028 | { | |
2029 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
2030 | ||
2031 | return !strncmp(name, prefix, max_cmp_len); | |
2032 | } | |
2033 | ||
2034 | /* Perform userspace-specific event name validation */ | |
2035 | static int validate_ust_event_name(const char *name) | |
2036 | { | |
2037 | int ret = 0; | |
2038 | ||
2039 | if (!name) { | |
2040 | ret = -1; | |
2041 | goto end; | |
2042 | } | |
2043 | ||
2044 | /* | |
2045 | * Check name against all internal UST event component namespaces used | |
2046 | * by the agents. | |
2047 | */ | |
2048 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
2049 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
2050 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
2051 | ret = -1; | |
2052 | } | |
2053 | ||
2054 | end: | |
2055 | return ret; | |
2056 | } | |
88f06f15 | 2057 | |
2f77fc4b | 2058 | /* |
88f06f15 JG |
2059 | * Internal version of cmd_enable_event() with a supplemental |
2060 | * "internal_event" flag which is used to enable internal events which should | |
2061 | * be hidden from clients. Such events are used in the agent implementation to | |
2062 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 2063 | */ |
88f06f15 | 2064 | static int _cmd_enable_event(struct ltt_session *session, |
df4f5a87 | 2065 | const struct lttng_domain *domain, |
025faf73 | 2066 | char *channel_name, struct lttng_event *event, |
6b453b5e | 2067 | char *filter_expression, |
2463b787 | 2068 | struct lttng_bytecode *filter, |
db8f1377 | 2069 | struct lttng_event_exclusion *exclusion, |
88f06f15 | 2070 | int wpipe, bool internal_event) |
2f77fc4b | 2071 | { |
9f449915 | 2072 | int ret = 0, channel_created = 0; |
cfedea03 | 2073 | struct lttng_channel *attr = NULL; |
2f77fc4b DG |
2074 | |
2075 | assert(session); | |
2076 | assert(event); | |
2077 | assert(channel_name); | |
2078 | ||
2a385866 JG |
2079 | /* If we have a filter, we must have its filter expression */ |
2080 | assert(!(!!filter_expression ^ !!filter)); | |
2081 | ||
9f449915 PP |
2082 | /* Normalize event name as a globbing pattern */ |
2083 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 2084 | |
9f449915 PP |
2085 | /* Normalize exclusion names as globbing patterns */ |
2086 | if (exclusion) { | |
2087 | size_t i; | |
f5ac4bd7 | 2088 | |
9f449915 PP |
2089 | for (i = 0; i < exclusion->count; i++) { |
2090 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
2091 | ||
2092 | strutils_normalize_star_glob_pattern(name); | |
2093 | } | |
930a2e99 JG |
2094 | } |
2095 | ||
9f449915 PP |
2096 | DBG("Enable event command for event \'%s\'", event->name); |
2097 | ||
2098 | rcu_read_lock(); | |
2099 | ||
7972aab2 | 2100 | switch (domain->type) { |
2f77fc4b DG |
2101 | case LTTNG_DOMAIN_KERNEL: |
2102 | { | |
2103 | struct ltt_kernel_channel *kchan; | |
2104 | ||
85076754 MD |
2105 | /* |
2106 | * If a non-default channel has been created in the | |
2107 | * session, explicitely require that -c chan_name needs | |
2108 | * to be provided. | |
2109 | */ | |
2110 | if (session->kernel_session->has_non_default_channel | |
2111 | && channel_name[0] == '\0') { | |
2112 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2113 | goto error; | |
2114 | } | |
2115 | ||
2f77fc4b DG |
2116 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2117 | session->kernel_session); | |
2118 | if (kchan == NULL) { | |
0a9c6494 DG |
2119 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
2120 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 2121 | if (attr == NULL) { |
f73fabfd | 2122 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2123 | goto error; |
2124 | } | |
04c17253 MD |
2125 | if (lttng_strncpy(attr->name, channel_name, |
2126 | sizeof(attr->name))) { | |
2127 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2128 | goto error; |
2129 | } | |
2f77fc4b DG |
2130 | |
2131 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2132 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2133 | goto error; |
2134 | } | |
e5f5db7f | 2135 | channel_created = 1; |
2f77fc4b DG |
2136 | } |
2137 | ||
2138 | /* Get the newly created kernel channel pointer */ | |
2139 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2140 | session->kernel_session); | |
2141 | if (kchan == NULL) { | |
2142 | /* This sould not happen... */ | |
f73fabfd | 2143 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2144 | goto error; |
2145 | } | |
2146 | ||
6e911cad MD |
2147 | switch (event->type) { |
2148 | case LTTNG_EVENT_ALL: | |
29c62722 | 2149 | { |
00a62084 | 2150 | char *filter_expression_a = NULL; |
2463b787 | 2151 | struct lttng_bytecode *filter_a = NULL; |
00a62084 MD |
2152 | |
2153 | /* | |
2154 | * We need to duplicate filter_expression and filter, | |
2155 | * because ownership is passed to first enable | |
2156 | * event. | |
2157 | */ | |
2158 | if (filter_expression) { | |
2159 | filter_expression_a = strdup(filter_expression); | |
2160 | if (!filter_expression_a) { | |
2161 | ret = LTTNG_ERR_FATAL; | |
2162 | goto error; | |
2163 | } | |
2164 | } | |
2165 | if (filter) { | |
2166 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
2167 | if (!filter_a) { | |
2168 | free(filter_expression_a); | |
2169 | ret = LTTNG_ERR_FATAL; | |
2170 | goto error; | |
2171 | } | |
2172 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
2173 | } | |
29c62722 | 2174 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
2175 | ret = event_kernel_enable_event(kchan, event, |
2176 | filter_expression, filter); | |
a969e101 MD |
2177 | /* We have passed ownership */ |
2178 | filter_expression = NULL; | |
2179 | filter = NULL; | |
29c62722 MD |
2180 | if (ret != LTTNG_OK) { |
2181 | if (channel_created) { | |
2182 | /* Let's not leak a useless channel. */ | |
2183 | kernel_destroy_channel(kchan); | |
2184 | } | |
00a62084 MD |
2185 | free(filter_expression_a); |
2186 | free(filter_a); | |
29c62722 MD |
2187 | goto error; |
2188 | } | |
2189 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
2190 | ret = event_kernel_enable_event(kchan, event, |
2191 | filter_expression_a, filter_a); | |
60d21fa2 AB |
2192 | /* We have passed ownership */ |
2193 | filter_expression_a = NULL; | |
2194 | filter_a = NULL; | |
29c62722 MD |
2195 | if (ret != LTTNG_OK) { |
2196 | goto error; | |
2197 | } | |
2198 | break; | |
2199 | } | |
6e6ef3d7 | 2200 | case LTTNG_EVENT_PROBE: |
dcabc190 | 2201 | case LTTNG_EVENT_USERSPACE_PROBE: |
6e6ef3d7 DG |
2202 | case LTTNG_EVENT_FUNCTION: |
2203 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 2204 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
2205 | ret = event_kernel_enable_event(kchan, event, |
2206 | filter_expression, filter); | |
a969e101 MD |
2207 | /* We have passed ownership */ |
2208 | filter_expression = NULL; | |
2209 | filter = NULL; | |
6e911cad MD |
2210 | if (ret != LTTNG_OK) { |
2211 | if (channel_created) { | |
2212 | /* Let's not leak a useless channel. */ | |
2213 | kernel_destroy_channel(kchan); | |
2214 | } | |
2215 | goto error; | |
e5f5db7f | 2216 | } |
6e911cad MD |
2217 | break; |
2218 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
2219 | ret = event_kernel_enable_event(kchan, event, |
2220 | filter_expression, filter); | |
a969e101 MD |
2221 | /* We have passed ownership */ |
2222 | filter_expression = NULL; | |
2223 | filter = NULL; | |
e2b957af MD |
2224 | if (ret != LTTNG_OK) { |
2225 | goto error; | |
2226 | } | |
6e911cad MD |
2227 | break; |
2228 | default: | |
2229 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
2230 | goto error; |
2231 | } | |
2232 | ||
7d268848 | 2233 | kernel_wait_quiescent(); |
2f77fc4b DG |
2234 | break; |
2235 | } | |
2236 | case LTTNG_DOMAIN_UST: | |
2237 | { | |
2238 | struct ltt_ust_channel *uchan; | |
2239 | struct ltt_ust_session *usess = session->ust_session; | |
2240 | ||
2241 | assert(usess); | |
2242 | ||
85076754 MD |
2243 | /* |
2244 | * If a non-default channel has been created in the | |
2245 | * session, explicitely require that -c chan_name needs | |
2246 | * to be provided. | |
2247 | */ | |
2248 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
2249 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2250 | goto error; | |
2251 | } | |
2252 | ||
2f77fc4b DG |
2253 | /* Get channel from global UST domain */ |
2254 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2255 | channel_name); | |
2256 | if (uchan == NULL) { | |
2257 | /* Create default channel */ | |
0a9c6494 DG |
2258 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
2259 | usess->buffer_type); | |
2f77fc4b | 2260 | if (attr == NULL) { |
f73fabfd | 2261 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2262 | goto error; |
2263 | } | |
04c17253 MD |
2264 | if (lttng_strncpy(attr->name, channel_name, |
2265 | sizeof(attr->name))) { | |
2266 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2267 | goto error; |
2268 | } | |
2f77fc4b DG |
2269 | |
2270 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2271 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2272 | goto error; |
2273 | } | |
2f77fc4b DG |
2274 | |
2275 | /* Get the newly created channel reference back */ | |
2276 | uchan = trace_ust_find_channel_by_name( | |
2277 | usess->domain_global.channels, channel_name); | |
2278 | assert(uchan); | |
2279 | } | |
2280 | ||
141feb8c JG |
2281 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2282 | /* | |
2283 | * Don't allow users to add UST events to channels which | |
2284 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2285 | * Python, etc.). | |
2286 | */ | |
2287 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2288 | goto error; | |
2289 | } | |
2290 | ||
dac8e046 JG |
2291 | if (!internal_event) { |
2292 | /* | |
2293 | * Ensure the event name is not reserved for internal | |
2294 | * use. | |
2295 | */ | |
2296 | ret = validate_ust_event_name(event->name); | |
2297 | if (ret) { | |
0e270a1e | 2298 | WARN("Userspace event name %s failed validation.", |
bbcab087 | 2299 | event->name); |
dac8e046 JG |
2300 | ret = LTTNG_ERR_INVALID_EVENT_NAME; |
2301 | goto error; | |
2302 | } | |
2303 | } | |
2304 | ||
2f77fc4b | 2305 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 2306 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
88f06f15 JG |
2307 | filter_expression, filter, exclusion, |
2308 | internal_event); | |
49d21f93 MD |
2309 | /* We have passed ownership */ |
2310 | filter_expression = NULL; | |
2311 | filter = NULL; | |
2312 | exclusion = NULL; | |
94382e15 JG |
2313 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2314 | goto already_enabled; | |
2315 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2316 | goto error; |
2317 | } | |
2318 | break; | |
2319 | } | |
5cdb6027 | 2320 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2321 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2322 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2323 | { |
da6c3a50 | 2324 | const char *default_event_name, *default_chan_name; |
fefd409b | 2325 | struct agent *agt; |
f20baf8e DG |
2326 | struct lttng_event uevent; |
2327 | struct lttng_domain tmp_dom; | |
2328 | struct ltt_ust_session *usess = session->ust_session; | |
2329 | ||
2330 | assert(usess); | |
2331 | ||
f28f9e44 JG |
2332 | if (!agent_tracing_is_enabled()) { |
2333 | DBG("Attempted to enable an event in an agent domain but the agent thread is not running"); | |
2334 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
2335 | goto error; | |
2336 | } | |
2337 | ||
5cdb6027 | 2338 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2339 | if (!agt) { |
5cdb6027 | 2340 | agt = agent_create(domain->type); |
fefd409b | 2341 | if (!agt) { |
e5b3c48c | 2342 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2343 | goto error; |
2344 | } | |
2345 | agent_add(agt, usess->agents); | |
2346 | } | |
2347 | ||
022d91ba | 2348 | /* Create the default tracepoint. */ |
996de3c7 | 2349 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2350 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2351 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
51755dc8 JG |
2352 | default_event_name = event_get_default_agent_ust_name( |
2353 | domain->type); | |
da6c3a50 | 2354 | if (!default_event_name) { |
e5b3c48c | 2355 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2356 | goto error; |
f43f95a9 | 2357 | } |
da6c3a50 | 2358 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2359 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2360 | ||
2361 | /* | |
2362 | * The domain type is changed because we are about to enable the | |
2363 | * default channel and event for the JUL domain that are hardcoded. | |
2364 | * This happens in the UST domain. | |
2365 | */ | |
2366 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2367 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2368 | ||
0e115563 DG |
2369 | switch (domain->type) { |
2370 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2371 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2372 | break; |
2373 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2374 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2375 | break; |
2376 | case LTTNG_DOMAIN_PYTHON: | |
2377 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2378 | break; | |
2379 | default: | |
e98a44b0 | 2380 | /* The switch/case we are in makes this impossible */ |
0e115563 | 2381 | assert(0); |
da6c3a50 DG |
2382 | } |
2383 | ||
971da06a | 2384 | { |
8404118c | 2385 | char *filter_expression_copy = NULL; |
2463b787 | 2386 | struct lttng_bytecode *filter_copy = NULL; |
971da06a JG |
2387 | |
2388 | if (filter) { | |
51755dc8 | 2389 | const size_t filter_size = sizeof( |
2463b787 | 2390 | struct lttng_bytecode) |
51755dc8 JG |
2391 | + filter->len; |
2392 | ||
2393 | filter_copy = zmalloc(filter_size); | |
971da06a | 2394 | if (!filter_copy) { |
018096a4 | 2395 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2396 | goto error; |
971da06a | 2397 | } |
51755dc8 | 2398 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2399 | |
8404118c JG |
2400 | filter_expression_copy = |
2401 | strdup(filter_expression); | |
2402 | if (!filter_expression) { | |
2403 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2404 | } |
2405 | ||
2406 | if (!filter_expression_copy || !filter_copy) { | |
2407 | free(filter_expression_copy); | |
2408 | free(filter_copy); | |
2409 | goto error; | |
8404118c | 2410 | } |
971da06a JG |
2411 | } |
2412 | ||
88f06f15 | 2413 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a | 2414 | (char *) default_chan_name, |
8404118c JG |
2415 | &uevent, filter_expression_copy, |
2416 | filter_copy, NULL, wpipe); | |
971da06a JG |
2417 | } |
2418 | ||
94382e15 JG |
2419 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2420 | goto already_enabled; | |
2421 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2422 | goto error; |
2423 | } | |
2424 | ||
2425 | /* The wild card * means that everything should be enabled. */ | |
2426 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8404118c JG |
2427 | ret = event_agent_enable_all(usess, agt, event, filter, |
2428 | filter_expression); | |
f20baf8e | 2429 | } else { |
8404118c JG |
2430 | ret = event_agent_enable(usess, agt, event, filter, |
2431 | filter_expression); | |
f20baf8e | 2432 | } |
51755dc8 JG |
2433 | filter = NULL; |
2434 | filter_expression = NULL; | |
f20baf8e DG |
2435 | if (ret != LTTNG_OK) { |
2436 | goto error; | |
2437 | } | |
2438 | ||
2439 | break; | |
2440 | } | |
2f77fc4b | 2441 | default: |
f73fabfd | 2442 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2443 | goto error; |
2444 | } | |
2445 | ||
f73fabfd | 2446 | ret = LTTNG_OK; |
2f77fc4b | 2447 | |
94382e15 | 2448 | already_enabled: |
2f77fc4b | 2449 | error: |
49d21f93 MD |
2450 | free(filter_expression); |
2451 | free(filter); | |
2452 | free(exclusion); | |
cf0bcb51 | 2453 | channel_attr_destroy(attr); |
2223c96f | 2454 | rcu_read_unlock(); |
2f77fc4b DG |
2455 | return ret; |
2456 | } | |
2457 | ||
88f06f15 JG |
2458 | /* |
2459 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2460 | * We own filter, exclusion, and filter_expression. | |
2461 | */ | |
df4f5a87 JG |
2462 | int cmd_enable_event(struct ltt_session *session, |
2463 | const struct lttng_domain *domain, | |
88f06f15 JG |
2464 | char *channel_name, struct lttng_event *event, |
2465 | char *filter_expression, | |
2463b787 | 2466 | struct lttng_bytecode *filter, |
88f06f15 JG |
2467 | struct lttng_event_exclusion *exclusion, |
2468 | int wpipe) | |
2469 | { | |
2470 | return _cmd_enable_event(session, domain, channel_name, event, | |
2471 | filter_expression, filter, exclusion, wpipe, false); | |
2472 | } | |
2473 | ||
2474 | /* | |
2475 | * Enable an event which is internal to LTTng. An internal should | |
2476 | * never be made visible to clients and are immune to checks such as | |
2477 | * reserved names. | |
2478 | */ | |
2479 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 2480 | const struct lttng_domain *domain, |
88f06f15 JG |
2481 | char *channel_name, struct lttng_event *event, |
2482 | char *filter_expression, | |
2463b787 | 2483 | struct lttng_bytecode *filter, |
88f06f15 JG |
2484 | struct lttng_event_exclusion *exclusion, |
2485 | int wpipe) | |
2486 | { | |
2487 | return _cmd_enable_event(session, domain, channel_name, event, | |
2488 | filter_expression, filter, exclusion, wpipe, true); | |
2489 | } | |
2490 | ||
2f77fc4b DG |
2491 | /* |
2492 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2493 | */ | |
56a37563 JG |
2494 | ssize_t cmd_list_tracepoints(enum lttng_domain_type domain, |
2495 | struct lttng_event **events) | |
2f77fc4b DG |
2496 | { |
2497 | int ret; | |
2498 | ssize_t nb_events = 0; | |
2499 | ||
2500 | switch (domain) { | |
2501 | case LTTNG_DOMAIN_KERNEL: | |
7d268848 | 2502 | nb_events = kernel_list_events(events); |
2f77fc4b | 2503 | if (nb_events < 0) { |
f73fabfd | 2504 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2505 | goto error; |
2506 | } | |
2507 | break; | |
2508 | case LTTNG_DOMAIN_UST: | |
2509 | nb_events = ust_app_list_events(events); | |
2510 | if (nb_events < 0) { | |
f73fabfd | 2511 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2512 | goto error; |
2513 | } | |
2514 | break; | |
5cdb6027 | 2515 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2516 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2517 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 2518 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
2519 | if (nb_events < 0) { |
2520 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2521 | goto error; | |
2522 | } | |
2523 | break; | |
2f77fc4b | 2524 | default: |
f73fabfd | 2525 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2526 | goto error; |
2527 | } | |
2528 | ||
2529 | return nb_events; | |
2530 | ||
2531 | error: | |
2532 | /* Return negative value to differentiate return code */ | |
2533 | return -ret; | |
2534 | } | |
2535 | ||
2536 | /* | |
2537 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2538 | */ | |
56a37563 | 2539 | ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
2f77fc4b DG |
2540 | struct lttng_event_field **fields) |
2541 | { | |
2542 | int ret; | |
2543 | ssize_t nb_fields = 0; | |
2544 | ||
2545 | switch (domain) { | |
2546 | case LTTNG_DOMAIN_UST: | |
2547 | nb_fields = ust_app_list_event_fields(fields); | |
2548 | if (nb_fields < 0) { | |
f73fabfd | 2549 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2550 | goto error; |
2551 | } | |
2552 | break; | |
2553 | case LTTNG_DOMAIN_KERNEL: | |
2554 | default: /* fall-through */ | |
f73fabfd | 2555 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2556 | goto error; |
2557 | } | |
2558 | ||
2559 | return nb_fields; | |
2560 | ||
2561 | error: | |
2562 | /* Return negative value to differentiate return code */ | |
2563 | return -ret; | |
2564 | } | |
2565 | ||
834978fd DG |
2566 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
2567 | { | |
2568 | return syscall_table_list(events); | |
2569 | } | |
2570 | ||
2f77fc4b DG |
2571 | /* |
2572 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2573 | * |
2574 | * Called with session mutex held. | |
2f77fc4b DG |
2575 | */ |
2576 | int cmd_start_trace(struct ltt_session *session) | |
2577 | { | |
82b69413 | 2578 | enum lttng_error_code ret; |
cde3e505 | 2579 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2580 | struct ltt_kernel_session *ksession; |
2581 | struct ltt_ust_session *usess; | |
1f496244 JG |
2582 | const bool session_rotated_after_last_stop = |
2583 | session->rotated_after_last_stop; | |
b02f5986 MD |
2584 | const bool session_cleared_after_last_stop = |
2585 | session->cleared_after_last_stop; | |
2f77fc4b DG |
2586 | |
2587 | assert(session); | |
2588 | ||
2589 | /* Ease our life a bit ;) */ | |
2590 | ksession = session->kernel_session; | |
2591 | usess = session->ust_session; | |
2592 | ||
8382cf6f DG |
2593 | /* Is the session already started? */ |
2594 | if (session->active) { | |
f73fabfd | 2595 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
7a24ece3 JR |
2596 | /* Perform nothing */ |
2597 | goto end; | |
2f77fc4b DG |
2598 | } |
2599 | ||
1f496244 JG |
2600 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING && |
2601 | !session->current_trace_chunk) { | |
2602 | /* | |
2603 | * A rotation was launched while the session was stopped and | |
2604 | * it has not been completed yet. It is not possible to start | |
2605 | * the session since starting the session here would require a | |
2606 | * rotation from "NULL" to a new trace chunk. That rotation | |
2607 | * would overlap with the ongoing rotation, which is not | |
2608 | * supported. | |
2609 | */ | |
2610 | WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing", | |
2611 | session->name); | |
2612 | ret = LTTNG_ERR_ROTATION_PENDING; | |
2613 | goto error; | |
2614 | } | |
2615 | ||
cde3e505 DG |
2616 | /* |
2617 | * Starting a session without channel is useless since after that it's not | |
2618 | * possible to enable channel thus inform the client. | |
2619 | */ | |
2620 | if (usess && usess->domain_global.channels) { | |
2621 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2622 | } | |
2623 | if (ksession) { | |
2624 | nb_chan += ksession->channel_count; | |
2625 | } | |
2626 | if (!nb_chan) { | |
2627 | ret = LTTNG_ERR_NO_CHANNEL; | |
2628 | goto error; | |
2629 | } | |
2630 | ||
1f496244 JG |
2631 | session->active = 1; |
2632 | session->rotated_after_last_stop = false; | |
b02f5986 | 2633 | session->cleared_after_last_stop = false; |
070b6a86 | 2634 | if (session->output_traces && !session->current_trace_chunk) { |
1f496244 JG |
2635 | if (!session->has_been_started) { |
2636 | struct lttng_trace_chunk *trace_chunk; | |
2637 | ||
2638 | DBG("Creating initial trace chunk of session \"%s\"", | |
2639 | session->name); | |
2640 | trace_chunk = session_create_new_trace_chunk( | |
2641 | session, NULL, NULL, NULL); | |
2642 | if (!trace_chunk) { | |
2643 | ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
2644 | goto error; | |
2645 | } | |
2646 | assert(!session->current_trace_chunk); | |
2647 | ret = session_set_trace_chunk(session, trace_chunk, | |
2648 | NULL); | |
2649 | lttng_trace_chunk_put(trace_chunk); | |
2650 | if (ret) { | |
2651 | ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
2652 | goto error; | |
2653 | } | |
2654 | } else { | |
2655 | DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk", | |
2656 | session->name); | |
2657 | /* | |
2658 | * Rotate existing streams into the new chunk. | |
2659 | * This is a "quiet" rotation has no client has | |
2660 | * explicitly requested this operation. | |
2661 | * | |
2662 | * There is also no need to wait for the rotation | |
2663 | * to complete as it will happen immediately. No data | |
2664 | * was produced as the session was stopped, so the | |
2665 | * rotation should happen on reception of the command. | |
2666 | */ | |
343defc2 MD |
2667 | ret = cmd_rotate_session(session, NULL, true, |
2668 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
1f496244 JG |
2669 | if (ret != LTTNG_OK) { |
2670 | goto error; | |
2671 | } | |
5c408ad8 | 2672 | } |
c996624c JD |
2673 | } |
2674 | ||
2f77fc4b DG |
2675 | /* Kernel tracing */ |
2676 | if (ksession != NULL) { | |
c996624c | 2677 | DBG("Start kernel tracing session %s", session->name); |
7d268848 | 2678 | ret = start_kernel_session(ksession); |
9b6c7ec5 | 2679 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2680 | goto error; |
2681 | } | |
2f77fc4b DG |
2682 | } |
2683 | ||
2684 | /* Flag session that trace should start automatically */ | |
2685 | if (usess) { | |
82b69413 JG |
2686 | int int_ret = ust_app_start_trace_all(usess); |
2687 | ||
2688 | if (int_ret < 0) { | |
f73fabfd | 2689 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2690 | goto error; |
2691 | } | |
2692 | } | |
2693 | ||
04ed9e10 JG |
2694 | /* |
2695 | * Open a packet in every stream of the session to ensure that viewers | |
2696 | * can correctly identify the boundaries of the periods during which | |
2697 | * tracing was active for this session. | |
2698 | */ | |
2699 | ret = session_open_packets(session); | |
2700 | if (ret != LTTNG_OK) { | |
2701 | goto error; | |
2702 | } | |
2703 | ||
5c408ad8 JD |
2704 | /* |
2705 | * Clear the flag that indicates that a rotation was done while the | |
2706 | * session was stopped. | |
2707 | */ | |
2708 | session->rotated_after_last_stop = false; | |
2709 | ||
259c2674 | 2710 | if (session->rotate_timer_period) { |
82b69413 JG |
2711 | int int_ret = timer_session_rotation_schedule_timer_start( |
2712 | session, session->rotate_timer_period); | |
2713 | ||
2714 | if (int_ret < 0) { | |
259c2674 JD |
2715 | ERR("Failed to enable rotate timer"); |
2716 | ret = LTTNG_ERR_UNK; | |
2717 | goto error; | |
2718 | } | |
2719 | } | |
2720 | ||
f73fabfd | 2721 | ret = LTTNG_OK; |
2f77fc4b DG |
2722 | |
2723 | error: | |
1f496244 JG |
2724 | if (ret == LTTNG_OK) { |
2725 | /* Flag this after a successful start. */ | |
2726 | session->has_been_started |= 1; | |
2727 | } else { | |
2728 | session->active = 0; | |
2729 | /* Restore initial state on error. */ | |
2730 | session->rotated_after_last_stop = | |
2731 | session_rotated_after_last_stop; | |
b02f5986 MD |
2732 | session->cleared_after_last_stop = |
2733 | session_cleared_after_last_stop; | |
1f496244 | 2734 | } |
7a24ece3 | 2735 | end: |
2f77fc4b DG |
2736 | return ret; |
2737 | } | |
2738 | ||
2739 | /* | |
2740 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2741 | */ | |
2742 | int cmd_stop_trace(struct ltt_session *session) | |
2743 | { | |
2744 | int ret; | |
2f77fc4b DG |
2745 | struct ltt_kernel_session *ksession; |
2746 | struct ltt_ust_session *usess; | |
2747 | ||
2748 | assert(session); | |
2749 | ||
4dbe1875 | 2750 | DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
2f77fc4b DG |
2751 | /* Short cut */ |
2752 | ksession = session->kernel_session; | |
2753 | usess = session->ust_session; | |
2754 | ||
8382cf6f DG |
2755 | /* Session is not active. Skip everythong and inform the client. */ |
2756 | if (!session->active) { | |
f73fabfd | 2757 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2758 | goto error; |
2759 | } | |
2760 | ||
4dbe1875 MD |
2761 | ret = stop_kernel_session(ksession); |
2762 | if (ret != LTTNG_OK) { | |
2763 | goto error; | |
2f77fc4b DG |
2764 | } |
2765 | ||
14fb1ebe | 2766 | if (usess && usess->active) { |
2f77fc4b DG |
2767 | ret = ust_app_stop_trace_all(usess); |
2768 | if (ret < 0) { | |
f73fabfd | 2769 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2770 | goto error; |
2771 | } | |
2772 | } | |
2773 | ||
4dbe1875 MD |
2774 | DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name, |
2775 | session->id); | |
8382cf6f DG |
2776 | /* Flag inactive after a successful stop. */ |
2777 | session->active = 0; | |
4dbe1875 | 2778 | ret = LTTNG_OK; |
2f77fc4b DG |
2779 | |
2780 | error: | |
2781 | return ret; | |
2782 | } | |
2783 | ||
2784 | /* | |
433f5ba9 JR |
2785 | * Set the base_path of the session only if subdir of a control uris is set. |
2786 | * Return LTTNG_OK on success, otherwise LTTNG_ERR_*. | |
2f77fc4b | 2787 | */ |
433f5ba9 JR |
2788 | static int set_session_base_path_from_uris(struct ltt_session *session, |
2789 | size_t nb_uri, | |
bda32d56 | 2790 | struct lttng_uri *uris) |
2f77fc4b | 2791 | { |
433f5ba9 JR |
2792 | int ret; |
2793 | size_t i; | |
2f77fc4b | 2794 | |
e3876bf0 JR |
2795 | for (i = 0; i < nb_uri; i++) { |
2796 | if (uris[i].stype != LTTNG_STREAM_CONTROL || | |
2797 | uris[i].subdir[0] == '\0') { | |
2798 | /* Not interested in these URIs */ | |
2799 | continue; | |
2800 | } | |
2801 | ||
2802 | if (session->base_path != NULL) { | |
2803 | free(session->base_path); | |
2804 | session->base_path = NULL; | |
2805 | } | |
2806 | ||
2807 | /* Set session base_path */ | |
2808 | session->base_path = strdup(uris[i].subdir); | |
2809 | if (!session->base_path) { | |
433f5ba9 JR |
2810 | PERROR("Failed to copy base path \"%s\" to session \"%s\"", |
2811 | uris[i].subdir, session->name); | |
2812 | ret = LTTNG_ERR_NOMEM; | |
e3876bf0 JR |
2813 | goto error; |
2814 | } | |
433f5ba9 JR |
2815 | DBG2("Setting base path \"%s\" for session \"%s\"", |
2816 | session->base_path, session->name); | |
2817 | } | |
2818 | ret = LTTNG_OK; | |
2819 | error: | |
2820 | return ret; | |
2821 | } | |
2822 | ||
2823 | /* | |
2824 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2825 | */ | |
2826 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, | |
2827 | struct lttng_uri *uris) | |
2828 | { | |
2829 | int ret, i; | |
2830 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2831 | struct ltt_ust_session *usess = session->ust_session; | |
2832 | ||
2833 | assert(session); | |
2834 | assert(uris); | |
2835 | assert(nb_uri > 0); | |
2836 | ||
2837 | /* Can't set consumer URI if the session is active. */ | |
2838 | if (session->active) { | |
2839 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2840 | goto error; | |
2841 | } | |
2842 | ||
2843 | /* | |
2844 | * Set the session base path if any. This is done inside | |
2845 | * cmd_set_consumer_uri to preserve backward compatibility of the | |
2846 | * previous session creation api vs the session descriptor api. | |
2847 | */ | |
2848 | ret = set_session_base_path_from_uris(session, nb_uri, uris); | |
2849 | if (ret != LTTNG_OK) { | |
2850 | goto error; | |
e3876bf0 JR |
2851 | } |
2852 | ||
bda32d56 | 2853 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2854 | for (i = 0; i < nb_uri; i++) { |
e3876bf0 JR |
2855 | ret = add_uri_to_consumer(session, session->consumer, &uris[i], |
2856 | LTTNG_DOMAIN_NONE); | |
a74934ba | 2857 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2858 | goto error; |
2859 | } | |
2f77fc4b DG |
2860 | } |
2861 | ||
bda32d56 JG |
2862 | /* Set UST session URIs */ |
2863 | if (session->ust_session) { | |
2864 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2865 | ret = add_uri_to_consumer(session, |
bda32d56 | 2866 | session->ust_session->consumer, |
b178f53e | 2867 | &uris[i], LTTNG_DOMAIN_UST); |
bda32d56 JG |
2868 | if (ret != LTTNG_OK) { |
2869 | goto error; | |
2870 | } | |
2871 | } | |
2872 | } | |
2873 | ||
2874 | /* Set kernel session URIs */ | |
2875 | if (session->kernel_session) { | |
2876 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2877 | ret = add_uri_to_consumer(session, |
bda32d56 | 2878 | session->kernel_session->consumer, |
b178f53e | 2879 | &uris[i], LTTNG_DOMAIN_KERNEL); |
bda32d56 JG |
2880 | if (ret != LTTNG_OK) { |
2881 | goto error; | |
2882 | } | |
2883 | } | |
2884 | } | |
2885 | ||
7ab70fe0 DG |
2886 | /* |
2887 | * Make sure to set the session in output mode after we set URI since a | |
2888 | * session can be created without URL (thus flagged in no output mode). | |
2889 | */ | |
2890 | session->output_traces = 1; | |
2891 | if (ksess) { | |
2892 | ksess->output_traces = 1; | |
bda32d56 JG |
2893 | } |
2894 | ||
2895 | if (usess) { | |
7ab70fe0 DG |
2896 | usess->output_traces = 1; |
2897 | } | |
2898 | ||
2f77fc4b | 2899 | /* All good! */ |
f73fabfd | 2900 | ret = LTTNG_OK; |
2f77fc4b DG |
2901 | |
2902 | error: | |
2903 | return ret; | |
2904 | } | |
2905 | ||
b178f53e JG |
2906 | static |
2907 | enum lttng_error_code set_session_output_from_descriptor( | |
2908 | struct ltt_session *session, | |
2909 | const struct lttng_session_descriptor *descriptor) | |
2f77fc4b DG |
2910 | { |
2911 | int ret; | |
b178f53e JG |
2912 | enum lttng_error_code ret_code = LTTNG_OK; |
2913 | enum lttng_session_descriptor_type session_type = | |
2914 | lttng_session_descriptor_get_type(descriptor); | |
2915 | enum lttng_session_descriptor_output_type output_type = | |
2916 | lttng_session_descriptor_get_output_type(descriptor); | |
2917 | struct lttng_uri uris[2] = {}; | |
2918 | size_t uri_count = 0; | |
2919 | ||
2920 | switch (output_type) { | |
2921 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: | |
2922 | goto end; | |
2923 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: | |
2924 | lttng_session_descriptor_get_local_output_uri(descriptor, | |
2925 | &uris[0]); | |
2926 | uri_count = 1; | |
2927 | break; | |
2928 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: | |
2929 | lttng_session_descriptor_get_network_output_uris(descriptor, | |
2930 | &uris[0], &uris[1]); | |
2931 | uri_count = 2; | |
2932 | break; | |
2933 | default: | |
2934 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 2935 | goto end; |
2f77fc4b DG |
2936 | } |
2937 | ||
b178f53e JG |
2938 | switch (session_type) { |
2939 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
2940 | { | |
2941 | struct snapshot_output *new_output = NULL; | |
2942 | ||
2943 | new_output = snapshot_output_alloc(); | |
2944 | if (!new_output) { | |
2945 | ret_code = LTTNG_ERR_NOMEM; | |
2946 | goto end; | |
2947 | } | |
2948 | ||
2949 | ret = snapshot_output_init_with_uri(session, | |
2950 | DEFAULT_SNAPSHOT_MAX_SIZE, | |
2951 | NULL, uris, uri_count, session->consumer, | |
2952 | new_output, &session->snapshot); | |
2953 | if (ret < 0) { | |
2954 | ret_code = (ret == -ENOMEM) ? | |
2955 | LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID; | |
2956 | snapshot_output_destroy(new_output); | |
2957 | goto end; | |
2958 | } | |
2959 | snapshot_add_output(&session->snapshot, new_output); | |
2960 | break; | |
2961 | } | |
2962 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: | |
2963 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
2964 | { | |
2965 | ret_code = cmd_set_consumer_uri(session, uri_count, uris); | |
2966 | break; | |
2967 | } | |
2968 | default: | |
2969 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 2970 | goto end; |
2f77fc4b | 2971 | } |
b178f53e JG |
2972 | end: |
2973 | return ret_code; | |
2974 | } | |
2975 | ||
2976 | static | |
2977 | enum lttng_error_code cmd_create_session_from_descriptor( | |
2978 | struct lttng_session_descriptor *descriptor, | |
2979 | const lttng_sock_cred *creds, | |
2980 | const char *home_path) | |
2981 | { | |
2982 | int ret; | |
2983 | enum lttng_error_code ret_code; | |
2984 | const char *session_name; | |
2985 | struct ltt_session *new_session = NULL; | |
2986 | enum lttng_session_descriptor_status descriptor_status; | |
2f77fc4b | 2987 | |
e32d7f27 | 2988 | session_lock_list(); |
b178f53e JG |
2989 | if (home_path) { |
2990 | if (*home_path != '/') { | |
2991 | ERR("Home path provided by client is not absolute"); | |
2992 | ret_code = LTTNG_ERR_INVALID; | |
2993 | goto end; | |
2994 | } | |
2995 | } | |
2f77fc4b | 2996 | |
b178f53e JG |
2997 | descriptor_status = lttng_session_descriptor_get_session_name( |
2998 | descriptor, &session_name); | |
2999 | switch (descriptor_status) { | |
3000 | case LTTNG_SESSION_DESCRIPTOR_STATUS_OK: | |
3001 | break; | |
3002 | case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET: | |
3003 | session_name = NULL; | |
3004 | break; | |
3005 | default: | |
3006 | ret_code = LTTNG_ERR_INVALID; | |
3007 | goto end; | |
3008 | } | |
e3876bf0 | 3009 | |
b178f53e | 3010 | ret_code = session_create(session_name, creds->uid, creds->gid, |
e3876bf0 | 3011 | &new_session); |
b178f53e | 3012 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3013 | goto end; |
2f77fc4b DG |
3014 | } |
3015 | ||
b178f53e JG |
3016 | if (!session_name) { |
3017 | ret = lttng_session_descriptor_set_session_name(descriptor, | |
3018 | new_session->name); | |
3019 | if (ret) { | |
3020 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3021 | goto end; | |
3022 | } | |
3023 | } | |
3024 | ||
3025 | if (!lttng_session_descriptor_is_output_destination_initialized( | |
3026 | descriptor)) { | |
3027 | /* | |
3028 | * Only include the session's creation time in the output | |
3029 | * destination if the name of the session itself was | |
3030 | * not auto-generated. | |
3031 | */ | |
3032 | ret_code = lttng_session_descriptor_set_default_output( | |
3033 | descriptor, | |
3034 | session_name ? &new_session->creation_time : NULL, | |
3035 | home_path); | |
3036 | if (ret_code != LTTNG_OK) { | |
e32d7f27 | 3037 | goto end; |
2bba9e53 | 3038 | } |
2bba9e53 | 3039 | } else { |
b178f53e JG |
3040 | new_session->has_user_specified_directory = |
3041 | lttng_session_descriptor_has_output_directory( | |
3042 | descriptor); | |
2f77fc4b DG |
3043 | } |
3044 | ||
b178f53e JG |
3045 | switch (lttng_session_descriptor_get_type(descriptor)) { |
3046 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3047 | new_session->snapshot_mode = 1; | |
3048 | break; | |
3049 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3050 | new_session->live_timer = | |
3051 | lttng_session_descriptor_live_get_timer_interval( | |
3052 | descriptor); | |
3053 | break; | |
3054 | default: | |
3055 | break; | |
3056 | } | |
2f77fc4b | 3057 | |
b178f53e JG |
3058 | ret_code = set_session_output_from_descriptor(new_session, descriptor); |
3059 | if (ret_code != LTTNG_OK) { | |
3060 | goto end; | |
3061 | } | |
3062 | new_session->consumer->enabled = 1; | |
3063 | ret_code = LTTNG_OK; | |
e32d7f27 | 3064 | end: |
b178f53e JG |
3065 | /* Release reference provided by the session_create function. */ |
3066 | session_put(new_session); | |
3067 | if (ret_code != LTTNG_OK && new_session) { | |
3068 | /* Release the global reference on error. */ | |
3069 | session_destroy(new_session); | |
e32d7f27 | 3070 | } |
b178f53e JG |
3071 | session_unlock_list(); |
3072 | return ret_code; | |
2f77fc4b DG |
3073 | } |
3074 | ||
b178f53e JG |
3075 | enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock, |
3076 | struct lttng_session_descriptor **return_descriptor) | |
27babd3a DG |
3077 | { |
3078 | int ret; | |
b178f53e JG |
3079 | size_t payload_size; |
3080 | struct lttng_dynamic_buffer payload; | |
3081 | struct lttng_buffer_view home_dir_view; | |
3082 | struct lttng_buffer_view session_descriptor_view; | |
3083 | struct lttng_session_descriptor *session_descriptor = NULL; | |
3084 | enum lttng_error_code ret_code; | |
3085 | ||
3086 | lttng_dynamic_buffer_init(&payload); | |
3a91de3a | 3087 | if (cmd_ctx->lsm.u.create_session.home_dir_size >= |
b178f53e JG |
3088 | LTTNG_PATH_MAX) { |
3089 | ret_code = LTTNG_ERR_INVALID; | |
3090 | goto error; | |
27babd3a | 3091 | } |
3a91de3a | 3092 | if (cmd_ctx->lsm.u.create_session.session_descriptor_size > |
b178f53e JG |
3093 | LTTNG_SESSION_DESCRIPTOR_MAX_LEN) { |
3094 | ret_code = LTTNG_ERR_INVALID; | |
3095 | goto error; | |
27babd3a DG |
3096 | } |
3097 | ||
3a91de3a JG |
3098 | payload_size = cmd_ctx->lsm.u.create_session.home_dir_size + |
3099 | cmd_ctx->lsm.u.create_session.session_descriptor_size; | |
b178f53e JG |
3100 | ret = lttng_dynamic_buffer_set_size(&payload, payload_size); |
3101 | if (ret) { | |
3102 | ret_code = LTTNG_ERR_NOMEM; | |
3103 | goto error; | |
27babd3a DG |
3104 | } |
3105 | ||
b178f53e JG |
3106 | ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size); |
3107 | if (ret <= 0) { | |
3108 | ERR("Reception of session descriptor failed, aborting."); | |
3109 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3110 | goto error; | |
27babd3a DG |
3111 | } |
3112 | ||
b178f53e JG |
3113 | home_dir_view = lttng_buffer_view_from_dynamic_buffer( |
3114 | &payload, | |
3115 | 0, | |
3a91de3a | 3116 | cmd_ctx->lsm.u.create_session.home_dir_size); |
b178f53e JG |
3117 | session_descriptor_view = lttng_buffer_view_from_dynamic_buffer( |
3118 | &payload, | |
3a91de3a JG |
3119 | cmd_ctx->lsm.u.create_session.home_dir_size, |
3120 | cmd_ctx->lsm.u.create_session.session_descriptor_size); | |
27babd3a | 3121 | |
b178f53e JG |
3122 | ret = lttng_session_descriptor_create_from_buffer( |
3123 | &session_descriptor_view, &session_descriptor); | |
3124 | if (ret < 0) { | |
3125 | ERR("Failed to create session descriptor from payload of \"create session\" command"); | |
3126 | ret_code = LTTNG_ERR_INVALID; | |
3127 | goto error; | |
3128 | } | |
27babd3a | 3129 | |
b178f53e JG |
3130 | /* |
3131 | * Sets the descriptor's auto-generated properties (name, output) if | |
3132 | * needed. | |
3133 | */ | |
3134 | ret_code = cmd_create_session_from_descriptor(session_descriptor, | |
3135 | &cmd_ctx->creds, | |
3136 | home_dir_view.size ? home_dir_view.data : NULL); | |
3137 | if (ret_code != LTTNG_OK) { | |
3138 | goto error; | |
e32d7f27 | 3139 | } |
b178f53e JG |
3140 | |
3141 | ret_code = LTTNG_OK; | |
3142 | *return_descriptor = session_descriptor; | |
3143 | session_descriptor = NULL; | |
3144 | error: | |
3145 | lttng_dynamic_buffer_reset(&payload); | |
3146 | lttng_session_descriptor_destroy(session_descriptor); | |
3147 | return ret_code; | |
27babd3a DG |
3148 | } |
3149 | ||
3e3665b8 JG |
3150 | static |
3151 | void cmd_destroy_session_reply(const struct ltt_session *session, | |
3152 | void *_reply_context) | |
3153 | { | |
3154 | int ret; | |
3155 | ssize_t comm_ret; | |
3156 | const struct cmd_destroy_session_reply_context *reply_context = | |
3157 | _reply_context; | |
3158 | struct lttng_dynamic_buffer payload; | |
3159 | struct lttcomm_session_destroy_command_header cmd_header; | |
3160 | struct lttng_trace_archive_location *location = NULL; | |
3161 | struct lttcomm_lttng_msg llm = { | |
3162 | .cmd_type = LTTNG_DESTROY_SESSION, | |
3285a971 | 3163 | .ret_code = reply_context->destruction_status, |
3e3665b8 JG |
3164 | .pid = UINT32_MAX, |
3165 | .cmd_header_size = | |
3166 | sizeof(struct lttcomm_session_destroy_command_header), | |
3167 | .data_size = 0, | |
3168 | }; | |
3169 | size_t payload_size_before_location; | |
3170 | ||
3171 | lttng_dynamic_buffer_init(&payload); | |
3172 | ||
3173 | ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm)); | |
0e270a1e | 3174 | if (ret) { |
3e3665b8 JG |
3175 | ERR("Failed to append session destruction message"); |
3176 | goto error; | |
0e270a1e | 3177 | } |
3e3665b8 JG |
3178 | |
3179 | cmd_header.rotation_state = | |
3180 | (int32_t) (reply_context->implicit_rotation_on_destroy ? | |
3181 | session->rotation_state : | |
3182 | LTTNG_ROTATION_STATE_NO_ROTATION); | |
3183 | ret = lttng_dynamic_buffer_append(&payload, &cmd_header, | |
3184 | sizeof(cmd_header)); | |
3185 | if (ret) { | |
3186 | ERR("Failed to append session destruction command header"); | |
3187 | goto error; | |
3188 | } | |
3189 | ||
3190 | if (!reply_context->implicit_rotation_on_destroy) { | |
3191 | DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply", | |
3192 | session->name); | |
3193 | goto send_reply; | |
3194 | } | |
3195 | if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) { | |
3196 | DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply", | |
3197 | session->name); | |
3198 | goto send_reply; | |
3199 | } | |
3200 | ||
3201 | location = session_get_trace_archive_location(session); | |
3202 | if (!location) { | |
3203 | ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"", | |
3204 | session->name); | |
3205 | goto error; | |
3206 | } | |
3207 | ||
3208 | payload_size_before_location = payload.size; | |
3209 | comm_ret = lttng_trace_archive_location_serialize(location, | |
3210 | &payload); | |
3211 | if (comm_ret < 0) { | |
3212 | ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"", | |
3213 | session->name); | |
3214 | goto error; | |
3215 | } | |
3216 | /* Update the message to indicate the location's length. */ | |
3217 | ((struct lttcomm_lttng_msg *) payload.data)->data_size = | |
3218 | payload.size - payload_size_before_location; | |
3219 | send_reply: | |
3220 | comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd, | |
3221 | payload.data, payload.size); | |
3222 | if (comm_ret != (ssize_t) payload.size) { | |
3223 | ERR("Failed to send result of the destruction of session \"%s\" to client", | |
3224 | session->name); | |
3225 | } | |
3226 | error: | |
3227 | ret = close(reply_context->reply_sock_fd); | |
3228 | if (ret) { | |
3229 | PERROR("Failed to close client socket in deferred session destroy reply"); | |
3230 | } | |
3231 | lttng_dynamic_buffer_reset(&payload); | |
3232 | free(_reply_context); | |
3233 | } | |
3234 | ||
2f77fc4b DG |
3235 | /* |
3236 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
3237 | * |
3238 | * Called with session lock held. | |
2f77fc4b | 3239 | */ |
e32d7f27 | 3240 | int cmd_destroy_session(struct ltt_session *session, |
3e3665b8 JG |
3241 | struct notification_thread_handle *notification_thread_handle, |
3242 | int *sock_fd) | |
2f77fc4b DG |
3243 | { |
3244 | int ret; | |
3285a971 | 3245 | enum lttng_error_code destruction_last_error = LTTNG_OK; |
3e3665b8 JG |
3246 | struct cmd_destroy_session_reply_context *reply_context = NULL; |
3247 | ||
3248 | if (sock_fd) { | |
3249 | reply_context = zmalloc(sizeof(*reply_context)); | |
3250 | if (!reply_context) { | |
3251 | ret = LTTNG_ERR_NOMEM; | |
3252 | goto end; | |
3253 | } | |
3254 | reply_context->reply_sock_fd = *sock_fd; | |
3255 | } | |
2f77fc4b DG |
3256 | |
3257 | /* Safety net */ | |
3258 | assert(session); | |
3259 | ||
3e3665b8 JG |
3260 | DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, |
3261 | session->id); | |
3262 | if (session->active) { | |
3263 | DBG("Session \"%s\" is active, attempting to stop it before destroying it", | |
3264 | session->name); | |
3265 | ret = cmd_stop_trace(session); | |
3266 | if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
3267 | /* Carry on with the destruction of the session. */ | |
3268 | ERR("Failed to stop session \"%s\" as part of its destruction: %s", | |
3269 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3270 | destruction_last_error = ret; |
3e3665b8 JG |
3271 | } |
3272 | } | |
5c408ad8 | 3273 | |
92816cc3 JG |
3274 | if (session->rotation_schedule_timer_enabled) { |
3275 | if (timer_session_rotation_schedule_timer_stop( | |
3276 | session)) { | |
3277 | ERR("Failed to stop the \"rotation schedule\" timer of session %s", | |
3278 | session->name); | |
3285a971 | 3279 | destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR; |
92816cc3 | 3280 | } |
259c2674 JD |
3281 | } |
3282 | ||
90936dcf JD |
3283 | if (session->rotate_size) { |
3284 | unsubscribe_session_consumed_size_rotation(session, notification_thread_handle); | |
3285 | session->rotate_size = 0; | |
3286 | } | |
3287 | ||
a7ceb342 | 3288 | if (session->rotated && session->current_trace_chunk && session->output_traces) { |
b5893d8e JG |
3289 | /* |
3290 | * Perform a last rotation on destruction if rotations have | |
3291 | * occurred during the session's lifetime. | |
3292 | */ | |
343defc2 MD |
3293 | ret = cmd_rotate_session(session, NULL, false, |
3294 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
d2956687 JG |
3295 | if (ret != LTTNG_OK) { |
3296 | ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s", | |
3297 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3298 | destruction_last_error = -ret; |
124473a3 | 3299 | } |
0e270a1e | 3300 | if (reply_context) { |
3e3665b8 | 3301 | reply_context->implicit_rotation_on_destroy = true; |
0e270a1e JG |
3302 | } |
3303 | } else if (session->has_been_started && session->current_trace_chunk) { | |
7fdbed1c JG |
3304 | /* |
3305 | * The user has not triggered a session rotation. However, to | |
3306 | * ensure all data has been consumed, the session is rotated | |
3307 | * to a 'null' trace chunk before it is destroyed. | |
3308 | * | |
3309 | * This is a "quiet" rotation meaning that no notification is | |
3310 | * emitted and no renaming of the current trace chunk takes | |
3311 | * place. | |
3312 | */ | |
343defc2 MD |
3313 | ret = cmd_rotate_session(session, NULL, true, |
3314 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
53fb6336 JG |
3315 | /* |
3316 | * Rotation operations may not be supported by the kernel | |
3317 | * tracer. Hence, do not consider this implicit rotation as | |
3318 | * a session destruction error. The library has already stopped | |
3319 | * the session and waited for pending data; there is nothing | |
3320 | * left to do but complete the destruction of the session. | |
3321 | */ | |
3322 | if (ret != LTTNG_OK && | |
3323 | ret != -LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) { | |
7fdbed1c | 3324 | ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s", |
53fb6336 | 3325 | session->name, lttng_strerror(ret)); |
3285a971 | 3326 | destruction_last_error = -ret; |
7fdbed1c JG |
3327 | } |
3328 | } | |
5c408ad8 | 3329 | |
a503e1ef JG |
3330 | if (session->shm_path[0]) { |
3331 | /* | |
3332 | * When a session is created with an explicit shm_path, | |
3333 | * the consumer daemon will create its shared memory files | |
3334 | * at that location and will *not* unlink them. This is normal | |
3335 | * as the intention of that feature is to make it possible | |
3336 | * to retrieve the content of those files should a crash occur. | |
3337 | * | |
3338 | * To ensure the content of those files can be used, the | |
3339 | * sessiond daemon will replicate the content of the metadata | |
3340 | * cache in a metadata file. | |
3341 | * | |
3342 | * On clean-up, it is expected that the consumer daemon will | |
3343 | * unlink the shared memory files and that the session daemon | |
3344 | * will unlink the metadata file. Then, the session's directory | |
3345 | * in the shm path can be removed. | |
3346 | * | |
3347 | * Unfortunately, a flaw in the design of the sessiond's and | |
3348 | * consumerd's tear down of channels makes it impossible to | |
3349 | * determine when the sessiond _and_ the consumerd have both | |
3350 | * destroyed their representation of a channel. For one, the | |
3351 | * unlinking, close, and rmdir happen in deferred 'call_rcu' | |
3352 | * callbacks in both daemons. | |
3353 | * | |
3354 | * However, it is also impossible for the sessiond to know when | |
3355 | * the consumer daemon is done destroying its channel(s) since | |
3356 | * it occurs as a reaction to the closing of the channel's file | |
3357 | * descriptor. There is no resulting communication initiated | |
3358 | * from the consumerd to the sessiond to confirm that the | |
3359 | * operation is completed (and was successful). | |
3360 | * | |
3361 | * Until this is all fixed, the session daemon checks for the | |
3362 | * removal of the session's shm path which makes it possible | |
3363 | * to safely advertise a session as having been destroyed. | |
3364 | * | |
3365 | * Prior to this fix, it was not possible to reliably save | |
3366 | * a session making use of the --shm-path option, destroy it, | |
3367 | * and load it again. This is because the creation of the | |
3368 | * session would fail upon seeing the session's shm path | |
3369 | * already in existence. | |
3370 | * | |
3371 | * Note that none of the error paths in the check for the | |
3372 | * directory's existence return an error. This is normal | |
3373 | * as there isn't much that can be done. The session will | |
3374 | * be destroyed properly, except that we can't offer the | |
3375 | * guarantee that the same session can be re-created. | |
3376 | */ | |
3377 | current_completion_handler = &destroy_completion_handler.handler; | |
3378 | ret = lttng_strncpy(destroy_completion_handler.shm_path, | |
3379 | session->shm_path, | |
3380 | sizeof(destroy_completion_handler.shm_path)); | |
3381 | assert(!ret); | |
3382 | } | |
e32d7f27 JG |
3383 | |
3384 | /* | |
3385 | * The session is destroyed. However, note that the command context | |
3386 | * still holds a reference to the session, thus delaying its destruction | |
3387 | * _at least_ up to the point when that reference is released. | |
3388 | */ | |
3389 | session_destroy(session); | |
3e3665b8 | 3390 | if (reply_context) { |
3285a971 | 3391 | reply_context->destruction_status = destruction_last_error; |
3e3665b8 JG |
3392 | ret = session_add_destroy_notifier(session, |
3393 | cmd_destroy_session_reply, | |
3394 | (void *) reply_context); | |
3395 | if (ret) { | |
3396 | ret = LTTNG_ERR_FATAL; | |
3397 | goto end; | |
3398 | } else { | |
3399 | *sock_fd = -1; | |
3400 | } | |
0e270a1e JG |
3401 | } |
3402 | ret = LTTNG_OK; | |
3e3665b8 | 3403 | end: |
2f77fc4b DG |
3404 | return ret; |
3405 | } | |
3406 | ||
2f77fc4b DG |
3407 | /* |
3408 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3409 | */ | |
56a37563 JG |
3410 | int cmd_register_consumer(struct ltt_session *session, |
3411 | enum lttng_domain_type domain, const char *sock_path, | |
3412 | struct consumer_data *cdata) | |
2f77fc4b DG |
3413 | { |
3414 | int ret, sock; | |
dd81b457 | 3415 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
3416 | |
3417 | assert(session); | |
3418 | assert(cdata); | |
3419 | assert(sock_path); | |
3420 | ||
3421 | switch (domain) { | |
3422 | case LTTNG_DOMAIN_KERNEL: | |
3423 | { | |
3424 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3425 | ||
3426 | assert(ksess); | |
3427 | ||
3428 | /* Can't register a consumer if there is already one */ | |
3429 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 3430 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
3431 | goto error; |
3432 | } | |
3433 | ||
3434 | sock = lttcomm_connect_unix_sock(sock_path); | |
3435 | if (sock < 0) { | |
f73fabfd | 3436 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
3437 | goto error; |
3438 | } | |
4ce514c4 | 3439 | cdata->cmd_sock = sock; |
2f77fc4b | 3440 | |
4ce514c4 | 3441 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 3442 | if (socket == NULL) { |
f66c074c DG |
3443 | ret = close(sock); |
3444 | if (ret < 0) { | |
3445 | PERROR("close register consumer"); | |
3446 | } | |
4ce514c4 | 3447 | cdata->cmd_sock = -1; |
f73fabfd | 3448 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3449 | goto error; |
3450 | } | |
3451 | ||
3452 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
3453 | if (socket->lock == NULL) { | |
3454 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 3455 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3456 | goto error; |
3457 | } | |
3458 | pthread_mutex_init(socket->lock, NULL); | |
3459 | socket->registered = 1; | |
3460 | ||
3461 | rcu_read_lock(); | |
3462 | consumer_add_socket(socket, ksess->consumer); | |
3463 | rcu_read_unlock(); | |
3464 | ||
3465 | pthread_mutex_lock(&cdata->pid_mutex); | |
3466 | cdata->pid = -1; | |
3467 | pthread_mutex_unlock(&cdata->pid_mutex); | |
3468 | ||
3469 | break; | |
3470 | } | |
3471 | default: | |
3472 | /* TODO: Userspace tracing */ | |
f73fabfd | 3473 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3474 | goto error; |
3475 | } | |
3476 | ||
dd81b457 | 3477 | return LTTNG_OK; |
2f77fc4b DG |
3478 | |
3479 | error: | |
dd81b457 DG |
3480 | if (socket) { |
3481 | consumer_destroy_socket(socket); | |
3482 | } | |
2f77fc4b DG |
3483 | return ret; |
3484 | } | |
3485 | ||
3486 | /* | |
3487 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3488 | */ | |
3489 | ssize_t cmd_list_domains(struct ltt_session *session, | |
3490 | struct lttng_domain **domains) | |
3491 | { | |
3492 | int ret, index = 0; | |
3493 | ssize_t nb_dom = 0; | |
fefd409b DG |
3494 | struct agent *agt; |
3495 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
3496 | |
3497 | if (session->kernel_session != NULL) { | |
3498 | DBG3("Listing domains found kernel domain"); | |
3499 | nb_dom++; | |
3500 | } | |
3501 | ||
3502 | if (session->ust_session != NULL) { | |
3503 | DBG3("Listing domains found UST global domain"); | |
3504 | nb_dom++; | |
3c6a091f | 3505 | |
e0a74f01 | 3506 | rcu_read_lock(); |
fefd409b DG |
3507 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3508 | agt, node.node) { | |
3509 | if (agt->being_used) { | |
3510 | nb_dom++; | |
3511 | } | |
3c6a091f | 3512 | } |
e0a74f01 | 3513 | rcu_read_unlock(); |
2f77fc4b DG |
3514 | } |
3515 | ||
fa64dfb4 JG |
3516 | if (!nb_dom) { |
3517 | goto end; | |
3518 | } | |
3519 | ||
2f77fc4b DG |
3520 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
3521 | if (*domains == NULL) { | |
f73fabfd | 3522 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3523 | goto error; |
3524 | } | |
3525 | ||
3526 | if (session->kernel_session != NULL) { | |
3527 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
b5edb9e8 PP |
3528 | |
3529 | /* Kernel session buffer type is always GLOBAL */ | |
3530 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
3531 | ||
2f77fc4b DG |
3532 | index++; |
3533 | } | |
3534 | ||
3535 | if (session->ust_session != NULL) { | |
3536 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 3537 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 3538 | index++; |
3c6a091f | 3539 | |
e0a74f01 | 3540 | rcu_read_lock(); |
fefd409b DG |
3541 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3542 | agt, node.node) { | |
3543 | if (agt->being_used) { | |
3544 | (*domains)[index].type = agt->domain; | |
3545 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
3546 | index++; | |
3547 | } | |
3c6a091f | 3548 | } |
e0a74f01 | 3549 | rcu_read_unlock(); |
2f77fc4b | 3550 | } |
fa64dfb4 | 3551 | end: |
2f77fc4b DG |
3552 | return nb_dom; |
3553 | ||
3554 | error: | |
f73fabfd DG |
3555 | /* Return negative value to differentiate return code */ |
3556 | return -ret; | |
2f77fc4b DG |
3557 | } |
3558 | ||
3559 | ||
3560 | /* | |
3561 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3562 | */ | |
56a37563 JG |
3563 | ssize_t cmd_list_channels(enum lttng_domain_type domain, |
3564 | struct ltt_session *session, struct lttng_channel **channels) | |
2f77fc4b | 3565 | { |
53e367f9 | 3566 | ssize_t nb_chan = 0, payload_size = 0, ret; |
2f77fc4b DG |
3567 | |
3568 | switch (domain) { | |
3569 | case LTTNG_DOMAIN_KERNEL: | |
3570 | if (session->kernel_session != NULL) { | |
3571 | nb_chan = session->kernel_session->channel_count; | |
3572 | } | |
3573 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 | 3574 | if (nb_chan <= 0) { |
53e367f9 JG |
3575 | ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
3576 | goto end; | |
c7d620a2 | 3577 | } |
2f77fc4b DG |
3578 | break; |
3579 | case LTTNG_DOMAIN_UST: | |
3580 | if (session->ust_session != NULL) { | |
7ffc31a2 | 3581 | rcu_read_lock(); |
2f77fc4b | 3582 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
3583 | session->ust_session->domain_global.channels); |
3584 | rcu_read_unlock(); | |
2f77fc4b DG |
3585 | } |
3586 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 3587 | if (nb_chan < 0) { |
53e367f9 JG |
3588 | ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND; |
3589 | goto end; | |
c7d620a2 | 3590 | } |
2f77fc4b DG |
3591 | break; |
3592 | default: | |
53e367f9 JG |
3593 | ret = -LTTNG_ERR_UND; |
3594 | goto end; | |
2f77fc4b DG |
3595 | } |
3596 | ||
3597 | if (nb_chan > 0) { | |
53e367f9 | 3598 | const size_t channel_size = sizeof(struct lttng_channel) + |
cf0bcb51 JG |
3599 | sizeof(struct lttng_channel_extended); |
3600 | struct lttng_channel_extended *channel_exts; | |
53e367f9 JG |
3601 | |
3602 | payload_size = nb_chan * channel_size; | |
3603 | *channels = zmalloc(payload_size); | |
2f77fc4b | 3604 | if (*channels == NULL) { |
53e367f9 JG |
3605 | ret = -LTTNG_ERR_FATAL; |
3606 | goto end; | |
2f77fc4b DG |
3607 | } |
3608 | ||
53e367f9 JG |
3609 | channel_exts = ((void *) *channels) + |
3610 | (nb_chan * sizeof(struct lttng_channel)); | |
d449df4a MD |
3611 | ret = list_lttng_channels(domain, session, *channels, channel_exts); |
3612 | if (ret != LTTNG_OK) { | |
3613 | free(*channels); | |
3614 | *channels = NULL; | |
3615 | goto end; | |
3616 | } | |
53e367f9 JG |
3617 | } else { |
3618 | *channels = NULL; | |
2f77fc4b DG |
3619 | } |
3620 | ||
53e367f9 JG |
3621 | ret = payload_size; |
3622 | end: | |
3623 | return ret; | |
2f77fc4b DG |
3624 | } |
3625 | ||
3626 | /* | |
3627 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3628 | */ | |
56a37563 JG |
3629 | ssize_t cmd_list_events(enum lttng_domain_type domain, |
3630 | struct ltt_session *session, char *channel_name, | |
e368fb43 | 3631 | struct lttng_payload *payload) |
2f77fc4b DG |
3632 | { |
3633 | int ret = 0; | |
e368fb43 JG |
3634 | ssize_t nb_events = 0; |
3635 | struct lttcomm_event_command_header cmd_header = {}; | |
3636 | const size_t cmd_header_offset = payload->buffer.size; | |
3637 | ||
3638 | ret = lttng_dynamic_buffer_append( | |
3639 | &payload->buffer, &cmd_header, sizeof(cmd_header)); | |
3640 | if (ret) { | |
3641 | ret = LTTNG_ERR_NOMEM; | |
3642 | goto error; | |
3643 | } | |
2f77fc4b DG |
3644 | |
3645 | switch (domain) { | |
3646 | case LTTNG_DOMAIN_KERNEL: | |
3647 | if (session->kernel_session != NULL) { | |
e368fb43 JG |
3648 | nb_events = list_lttng_kernel_events(channel_name, |
3649 | session->kernel_session, payload); | |
2f77fc4b DG |
3650 | } |
3651 | break; | |
3652 | case LTTNG_DOMAIN_UST: | |
3653 | { | |
3654 | if (session->ust_session != NULL) { | |
e368fb43 JG |
3655 | nb_events = list_lttng_ust_global_events(channel_name, |
3656 | &session->ust_session->domain_global, | |
3657 | payload); | |
2f77fc4b DG |
3658 | } |
3659 | break; | |
3660 | } | |
5cdb6027 | 3661 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3662 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3663 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3664 | if (session->ust_session) { |
fefd409b DG |
3665 | struct lttng_ht_iter iter; |
3666 | struct agent *agt; | |
3667 | ||
b11feea5 | 3668 | rcu_read_lock(); |
fefd409b DG |
3669 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
3670 | &iter.iter, agt, node.node) { | |
1dfd9906 | 3671 | if (agt->domain == domain) { |
e368fb43 JG |
3672 | nb_events = list_lttng_agent_events( |
3673 | agt, payload); | |
1dfd9906 JG |
3674 | break; |
3675 | } | |
fefd409b | 3676 | } |
b11feea5 | 3677 | rcu_read_unlock(); |
3c6a091f DG |
3678 | } |
3679 | break; | |
2f77fc4b | 3680 | default: |
f73fabfd | 3681 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3682 | goto error; |
3683 | } | |
3684 | ||
e368fb43 JG |
3685 | ((struct lttcomm_event_command_header *) (payload->buffer.data + |
3686 | cmd_header_offset))->nb_events = (uint32_t) nb_events; | |
3687 | ||
3688 | return nb_events; | |
2f77fc4b DG |
3689 | |
3690 | error: | |
f73fabfd DG |
3691 | /* Return negative value to differentiate return code */ |
3692 | return -ret; | |
2f77fc4b DG |
3693 | } |
3694 | ||
3695 | /* | |
3696 | * Using the session list, filled a lttng_session array to send back to the | |
3697 | * client for session listing. | |
3698 | * | |
3699 | * The session list lock MUST be acquired before calling this function. Use | |
3700 | * session_lock_list() and session_unlock_list(). | |
3701 | */ | |
b178f53e JG |
3702 | void cmd_list_lttng_sessions(struct lttng_session *sessions, |
3703 | size_t session_count, uid_t uid, gid_t gid) | |
2f77fc4b DG |
3704 | { |
3705 | int ret; | |
3706 | unsigned int i = 0; | |
3707 | struct ltt_session *session; | |
3708 | struct ltt_session_list *list = session_get_list(); | |
0e270a1e | 3709 | struct lttng_session_extended *extended = |
b178f53e | 3710 | (typeof(extended)) (&sessions[session_count]); |
2f77fc4b DG |
3711 | |
3712 | DBG("Getting all available session for UID %d GID %d", | |
3713 | uid, gid); | |
3714 | /* | |
3715 | * Iterate over session list and append data after the control struct in | |
3716 | * the buffer. | |
3717 | */ | |
3718 | cds_list_for_each_entry(session, &list->head, list) { | |
e32d7f27 JG |
3719 | if (!session_get(session)) { |
3720 | continue; | |
3721 | } | |
2f77fc4b DG |
3722 | /* |
3723 | * Only list the sessions the user can control. | |
3724 | */ | |
d7b377ed | 3725 | if (!session_access_ok(session, uid) || |
e32d7f27 JG |
3726 | session->destroyed) { |
3727 | session_put(session); | |
2f77fc4b DG |
3728 | continue; |
3729 | } | |
3730 | ||
3731 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3732 | struct ltt_ust_session *usess = session->ust_session; | |
3733 | ||
3734 | if (session->consumer->type == CONSUMER_DST_NET || | |
3735 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
3736 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3737 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 3738 | sizeof(sessions[i].path), session); |
2f77fc4b | 3739 | } else { |
dec56f6c | 3740 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
366a9222 | 3741 | session->consumer->dst.session_root_path); |
2f77fc4b DG |
3742 | } |
3743 | if (ret < 0) { | |
3744 | PERROR("snprintf session path"); | |
e32d7f27 | 3745 | session_put(session); |
2f77fc4b DG |
3746 | continue; |
3747 | } | |
3748 | ||
3749 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
3750 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 3751 | sessions[i].enabled = session->active; |
2cbf8fed | 3752 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 3753 | sessions[i].live_timer_interval = session->live_timer; |
b178f53e JG |
3754 | extended[i].creation_time.value = (uint64_t) session->creation_time; |
3755 | extended[i].creation_time.is_set = 1; | |
2f77fc4b | 3756 | i++; |
e32d7f27 | 3757 | session_put(session); |
2f77fc4b DG |
3758 | } |
3759 | } | |
3760 | ||
806e2684 | 3761 | /* |
6d805429 | 3762 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 3763 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 3764 | */ |
6d805429 | 3765 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
3766 | { |
3767 | int ret; | |
3768 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3769 | struct ltt_ust_session *usess = session->ust_session; | |
3770 | ||
3771 | assert(session); | |
3772 | ||
5c408ad8 JD |
3773 | DBG("Data pending for session %s", session->name); |
3774 | ||
806e2684 | 3775 | /* Session MUST be stopped to ask for data availability. */ |
8382cf6f | 3776 | if (session->active) { |
806e2684 DG |
3777 | ret = LTTNG_ERR_SESSION_STARTED; |
3778 | goto error; | |
3a89d11a DG |
3779 | } else { |
3780 | /* | |
3781 | * If stopped, just make sure we've started before else the above call | |
3782 | * will always send that there is data pending. | |
3783 | * | |
3784 | * The consumer assumes that when the data pending command is received, | |
3785 | * the trace has been started before or else no output data is written | |
3786 | * by the streams which is a condition for data pending. So, this is | |
3787 | * *VERY* important that we don't ask the consumer before a start | |
3788 | * trace. | |
3789 | */ | |
8382cf6f | 3790 | if (!session->has_been_started) { |
3a89d11a DG |
3791 | ret = 0; |
3792 | goto error; | |
3793 | } | |
806e2684 DG |
3794 | } |
3795 | ||
92816cc3 JG |
3796 | /* A rotation is still pending, we have to wait. */ |
3797 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { | |
5c408ad8 JD |
3798 | DBG("Rotate still pending for session %s", session->name); |
3799 | ret = 1; | |
3800 | goto error; | |
3801 | } | |
3802 | ||
806e2684 | 3803 | if (ksess && ksess->consumer) { |
6d805429 DG |
3804 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
3805 | if (ret == 1) { | |
806e2684 DG |
3806 | /* Data is still being extracted for the kernel. */ |
3807 | goto error; | |
3808 | } | |
3809 | } | |
3810 | ||
3811 | if (usess && usess->consumer) { | |
6d805429 DG |
3812 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
3813 | if (ret == 1) { | |
806e2684 DG |
3814 | /* Data is still being extracted for the kernel. */ |
3815 | goto error; | |
3816 | } | |
3817 | } | |
3818 | ||
3819 | /* Data is ready to be read by a viewer */ | |
6d805429 | 3820 | ret = 0; |
806e2684 DG |
3821 | |
3822 | error: | |
3823 | return ret; | |
3824 | } | |
3825 | ||
6dc3064a DG |
3826 | /* |
3827 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
3828 | * | |
3829 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3830 | */ | |
3831 | int cmd_snapshot_add_output(struct ltt_session *session, | |
df4f5a87 | 3832 | const struct lttng_snapshot_output *output, uint32_t *id) |
6dc3064a DG |
3833 | { |
3834 | int ret; | |
3835 | struct snapshot_output *new_output; | |
3836 | ||
3837 | assert(session); | |
3838 | assert(output); | |
3839 | ||
3840 | DBG("Cmd snapshot add output for session %s", session->name); | |
3841 | ||
3842 | /* | |
903ef685 | 3843 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
3844 | */ |
3845 | if (session->output_traces) { | |
903ef685 | 3846 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3847 | goto error; |
3848 | } | |
3849 | ||
54213acc JG |
3850 | if (session->has_non_mmap_channel) { |
3851 | ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED; | |
3852 | goto error; | |
3853 | } | |
3854 | ||
6dc3064a DG |
3855 | /* Only one output is allowed until we have the "tee" feature. */ |
3856 | if (session->snapshot.nb_output == 1) { | |
3857 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
3858 | goto error; | |
3859 | } | |
3860 | ||
3861 | new_output = snapshot_output_alloc(); | |
3862 | if (!new_output) { | |
3863 | ret = LTTNG_ERR_NOMEM; | |
3864 | goto error; | |
3865 | } | |
3866 | ||
b178f53e | 3867 | ret = snapshot_output_init(session, output->max_size, output->name, |
6dc3064a DG |
3868 | output->ctrl_url, output->data_url, session->consumer, new_output, |
3869 | &session->snapshot); | |
3870 | if (ret < 0) { | |
3871 | if (ret == -ENOMEM) { | |
3872 | ret = LTTNG_ERR_NOMEM; | |
3873 | } else { | |
3874 | ret = LTTNG_ERR_INVALID; | |
3875 | } | |
3876 | goto free_error; | |
3877 | } | |
3878 | ||
6dc3064a DG |
3879 | rcu_read_lock(); |
3880 | snapshot_add_output(&session->snapshot, new_output); | |
3881 | if (id) { | |
3882 | *id = new_output->id; | |
3883 | } | |
3884 | rcu_read_unlock(); | |
3885 | ||
3886 | return LTTNG_OK; | |
3887 | ||
3888 | free_error: | |
3889 | snapshot_output_destroy(new_output); | |
3890 | error: | |
3891 | return ret; | |
3892 | } | |
3893 | ||
3894 | /* | |
3895 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
3896 | * | |
3897 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3898 | */ | |
3899 | int cmd_snapshot_del_output(struct ltt_session *session, | |
df4f5a87 | 3900 | const struct lttng_snapshot_output *output) |
6dc3064a DG |
3901 | { |
3902 | int ret; | |
eb240553 | 3903 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
3904 | |
3905 | assert(session); | |
3906 | assert(output); | |
3907 | ||
6dc3064a DG |
3908 | rcu_read_lock(); |
3909 | ||
3910 | /* | |
d3f14b8a MD |
3911 | * Permission denied to create an output if the session is not |
3912 | * set in no output mode. | |
6dc3064a DG |
3913 | */ |
3914 | if (session->output_traces) { | |
903ef685 | 3915 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3916 | goto error; |
3917 | } | |
3918 | ||
eb240553 DG |
3919 | if (output->id) { |
3920 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
3921 | session->name); | |
3922 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
3923 | } else if (*output->name != '\0') { | |
3924 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
3925 | session->name); | |
3926 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
3927 | } | |
6dc3064a DG |
3928 | if (!sout) { |
3929 | ret = LTTNG_ERR_INVALID; | |
3930 | goto error; | |
3931 | } | |
3932 | ||
3933 | snapshot_delete_output(&session->snapshot, sout); | |
3934 | snapshot_output_destroy(sout); | |
3935 | ret = LTTNG_OK; | |
3936 | ||
3937 | error: | |
3938 | rcu_read_unlock(); | |
3939 | return ret; | |
3940 | } | |
3941 | ||
3942 | /* | |
3943 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
3944 | * | |
3945 | * If no output is available, outputs is untouched and 0 is returned. | |
3946 | * | |
3947 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
3948 | */ | |
3949 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
3950 | struct lttng_snapshot_output **outputs) | |
3951 | { | |
3952 | int ret, idx = 0; | |
b223ca94 | 3953 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
3954 | struct lttng_ht_iter iter; |
3955 | struct snapshot_output *output; | |
3956 | ||
3957 | assert(session); | |
3958 | assert(outputs); | |
3959 | ||
3960 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
3961 | ||
3962 | /* | |
d3f14b8a MD |
3963 | * Permission denied to create an output if the session is not |
3964 | * set in no output mode. | |
6dc3064a DG |
3965 | */ |
3966 | if (session->output_traces) { | |
903ef685 JG |
3967 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
3968 | goto end; | |
6dc3064a DG |
3969 | } |
3970 | ||
3971 | if (session->snapshot.nb_output == 0) { | |
3972 | ret = 0; | |
903ef685 | 3973 | goto end; |
6dc3064a DG |
3974 | } |
3975 | ||
3976 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
3977 | if (!list) { | |
b223ca94 | 3978 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 3979 | goto end; |
6dc3064a DG |
3980 | } |
3981 | ||
3982 | /* Copy list from session to the new list object. */ | |
b223ca94 | 3983 | rcu_read_lock(); |
6dc3064a DG |
3984 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
3985 | output, node.node) { | |
3986 | assert(output->consumer); | |
3987 | list[idx].id = output->id; | |
3988 | list[idx].max_size = output->max_size; | |
6ce22875 MD |
3989 | if (lttng_strncpy(list[idx].name, output->name, |
3990 | sizeof(list[idx].name))) { | |
3991 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 3992 | goto error; |
6ce22875 | 3993 | } |
6dc3064a | 3994 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
6ce22875 | 3995 | if (lttng_strncpy(list[idx].ctrl_url, |
366a9222 | 3996 | output->consumer->dst.session_root_path, |
6ce22875 MD |
3997 | sizeof(list[idx].ctrl_url))) { |
3998 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 3999 | goto error; |
6ce22875 | 4000 | } |
6dc3064a DG |
4001 | } else { |
4002 | /* Control URI. */ | |
4003 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
4004 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
4005 | if (ret < 0) { | |
b223ca94 | 4006 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4007 | goto error; |
6dc3064a DG |
4008 | } |
4009 | ||
4010 | /* Data URI. */ | |
4011 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
4012 | list[idx].data_url, sizeof(list[idx].data_url)); | |
4013 | if (ret < 0) { | |
b223ca94 | 4014 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4015 | goto error; |
6dc3064a DG |
4016 | } |
4017 | } | |
4018 | idx++; | |
4019 | } | |
4020 | ||
4021 | *outputs = list; | |
b223ca94 JG |
4022 | list = NULL; |
4023 | ret = session->snapshot.nb_output; | |
6dc3064a | 4024 | error: |
903ef685 | 4025 | rcu_read_unlock(); |
b223ca94 | 4026 | free(list); |
903ef685 | 4027 | end: |
b223ca94 | 4028 | return ret; |
6dc3064a DG |
4029 | } |
4030 | ||
93ec662e JD |
4031 | /* |
4032 | * Check if we can regenerate the metadata for this session. | |
4033 | * Only kernel, UST per-uid and non-live sessions are supported. | |
4034 | * | |
4035 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
4036 | */ | |
4037 | static | |
eded6438 | 4038 | int check_regenerate_metadata_support(struct ltt_session *session) |
93ec662e JD |
4039 | { |
4040 | int ret; | |
4041 | ||
4042 | assert(session); | |
4043 | ||
4044 | if (session->live_timer != 0) { | |
4045 | ret = LTTNG_ERR_LIVE_SESSION; | |
4046 | goto end; | |
4047 | } | |
4048 | if (!session->active) { | |
4049 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4050 | goto end; | |
4051 | } | |
4052 | if (session->ust_session) { | |
4053 | switch (session->ust_session->buffer_type) { | |
4054 | case LTTNG_BUFFER_PER_UID: | |
4055 | break; | |
4056 | case LTTNG_BUFFER_PER_PID: | |
4057 | ret = LTTNG_ERR_PER_PID_SESSION; | |
4058 | goto end; | |
4059 | default: | |
4060 | assert(0); | |
4061 | ret = LTTNG_ERR_UNK; | |
4062 | goto end; | |
4063 | } | |
4064 | } | |
4065 | if (session->consumer->type == CONSUMER_DST_NET && | |
4066 | session->consumer->relay_minor_version < 8) { | |
4067 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; | |
4068 | goto end; | |
4069 | } | |
4070 | ret = 0; | |
4071 | ||
4072 | end: | |
4073 | return ret; | |
4074 | } | |
4075 | ||
7802bae3 LL |
4076 | static |
4077 | int clear_metadata_file(int fd) | |
4078 | { | |
4079 | int ret; | |
a5df8828 | 4080 | off_t lseek_ret; |
7802bae3 | 4081 | |
a5df8828 GL |
4082 | lseek_ret = lseek(fd, 0, SEEK_SET); |
4083 | if (lseek_ret < 0) { | |
7802bae3 | 4084 | PERROR("lseek"); |
a5df8828 | 4085 | ret = -1; |
7802bae3 LL |
4086 | goto end; |
4087 | } | |
4088 | ||
4089 | ret = ftruncate(fd, 0); | |
4090 | if (ret < 0) { | |
4091 | PERROR("ftruncate"); | |
4092 | goto end; | |
4093 | } | |
4094 | ||
4095 | end: | |
4096 | return ret; | |
4097 | } | |
4098 | ||
93ec662e | 4099 | static |
eded6438 | 4100 | int ust_regenerate_metadata(struct ltt_ust_session *usess) |
93ec662e JD |
4101 | { |
4102 | int ret = 0; | |
4103 | struct buffer_reg_uid *uid_reg = NULL; | |
4104 | struct buffer_reg_session *session_reg = NULL; | |
4105 | ||
4106 | rcu_read_lock(); | |
4107 | cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { | |
4108 | struct ust_registry_session *registry; | |
4109 | struct ust_registry_channel *chan; | |
4110 | struct lttng_ht_iter iter_chan; | |
4111 | ||
4112 | session_reg = uid_reg->registry; | |
4113 | registry = session_reg->reg.ust; | |
4114 | ||
4115 | pthread_mutex_lock(®istry->lock); | |
4116 | registry->metadata_len_sent = 0; | |
4117 | memset(registry->metadata, 0, registry->metadata_alloc_len); | |
4118 | registry->metadata_len = 0; | |
4119 | registry->metadata_version++; | |
7802bae3 LL |
4120 | if (registry->metadata_fd > 0) { |
4121 | /* Clear the metadata file's content. */ | |
4122 | ret = clear_metadata_file(registry->metadata_fd); | |
4123 | if (ret) { | |
4124 | pthread_mutex_unlock(®istry->lock); | |
4125 | goto end; | |
4126 | } | |
4127 | } | |
4128 | ||
93ec662e JD |
4129 | ret = ust_metadata_session_statedump(registry, NULL, |
4130 | registry->major, registry->minor); | |
4131 | if (ret) { | |
4132 | pthread_mutex_unlock(®istry->lock); | |
4133 | ERR("Failed to generate session metadata (err = %d)", | |
4134 | ret); | |
4135 | goto end; | |
4136 | } | |
4137 | cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, | |
4138 | chan, node.node) { | |
4139 | struct ust_registry_event *event; | |
4140 | struct lttng_ht_iter iter_event; | |
4141 | ||
4142 | ret = ust_metadata_channel_statedump(registry, chan); | |
4143 | if (ret) { | |
4144 | pthread_mutex_unlock(®istry->lock); | |
4145 | ERR("Failed to generate channel metadata " | |
4146 | "(err = %d)", ret); | |
4147 | goto end; | |
4148 | } | |
4149 | cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, | |
4150 | event, node.node) { | |
4151 | ret = ust_metadata_event_statedump(registry, | |
4152 | chan, event); | |
4153 | if (ret) { | |
4154 | pthread_mutex_unlock(®istry->lock); | |
4155 | ERR("Failed to generate event metadata " | |
4156 | "(err = %d)", ret); | |
4157 | goto end; | |
4158 | } | |
4159 | } | |
4160 | } | |
4161 | pthread_mutex_unlock(®istry->lock); | |
4162 | } | |
4163 | ||
4164 | end: | |
4165 | rcu_read_unlock(); | |
4166 | return ret; | |
4167 | } | |
4168 | ||
4169 | /* | |
eded6438 | 4170 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
4171 | * |
4172 | * Ask the consumer to truncate the existing metadata file(s) and | |
4173 | * then regenerate the metadata. Live and per-pid sessions are not | |
4174 | * supported and return an error. | |
4175 | * | |
4176 | * Return 0 on success or else a LTTNG_ERR code. | |
4177 | */ | |
eded6438 | 4178 | int cmd_regenerate_metadata(struct ltt_session *session) |
93ec662e JD |
4179 | { |
4180 | int ret; | |
4181 | ||
4182 | assert(session); | |
4183 | ||
eded6438 | 4184 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
4185 | if (ret) { |
4186 | goto end; | |
4187 | } | |
4188 | ||
4189 | if (session->kernel_session) { | |
eded6438 | 4190 | ret = kernctl_session_regenerate_metadata( |
93ec662e JD |
4191 | session->kernel_session->fd); |
4192 | if (ret < 0) { | |
4193 | ERR("Failed to regenerate the kernel metadata"); | |
4194 | goto end; | |
4195 | } | |
4196 | } | |
4197 | ||
4198 | if (session->ust_session) { | |
eded6438 | 4199 | ret = ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
4200 | if (ret < 0) { |
4201 | ERR("Failed to regenerate the UST metadata"); | |
4202 | goto end; | |
4203 | } | |
4204 | } | |
4205 | DBG("Cmd metadata regenerate for session %s", session->name); | |
4206 | ret = LTTNG_OK; | |
4207 | ||
4208 | end: | |
4209 | return ret; | |
4210 | } | |
4211 | ||
c2561365 JD |
4212 | /* |
4213 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
4214 | * | |
4215 | * Ask the tracer to regenerate a new statedump. | |
4216 | * | |
4217 | * Return 0 on success or else a LTTNG_ERR code. | |
4218 | */ | |
4219 | int cmd_regenerate_statedump(struct ltt_session *session) | |
4220 | { | |
4221 | int ret; | |
4222 | ||
4223 | assert(session); | |
4224 | ||
4225 | if (!session->active) { | |
4226 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4227 | goto end; | |
4228 | } | |
c2561365 JD |
4229 | |
4230 | if (session->kernel_session) { | |
4231 | ret = kernctl_session_regenerate_statedump( | |
4232 | session->kernel_session->fd); | |
4233 | /* | |
4234 | * Currently, the statedump in kernel can only fail if out | |
4235 | * of memory. | |
4236 | */ | |
4237 | if (ret < 0) { | |
4238 | if (ret == -ENOMEM) { | |
4239 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
4240 | } else { | |
4241 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4242 | } | |
4243 | ERR("Failed to regenerate the kernel statedump"); | |
4244 | goto end; | |
4245 | } | |
4246 | } | |
4247 | ||
4248 | if (session->ust_session) { | |
4249 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
4250 | /* | |
4251 | * Currently, the statedump in UST always returns 0. | |
4252 | */ | |
4253 | if (ret < 0) { | |
4254 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4255 | ERR("Failed to regenerate the UST statedump"); | |
4256 | goto end; | |
4257 | } | |
4258 | } | |
4259 | DBG("Cmd regenerate statedump for session %s", session->name); | |
4260 | ret = LTTNG_OK; | |
4261 | ||
4262 | end: | |
4263 | return ret; | |
4264 | } | |
4265 | ||
2463b787 JR |
4266 | /* |
4267 | * On success LTTNG_OK. On error, returns lttng_error code. | |
4268 | */ | |
4269 | static enum lttng_error_code prepare_trigger_object(struct lttng_trigger *trigger, const struct lttng_credentials *cmd_creds) | |
4270 | { | |
4271 | enum lttng_error_code ret; | |
4272 | /* Internal object of the trigger might have to "generate" and | |
4273 | * "populate" internal field e.g filter bytecode | |
4274 | */ | |
4275 | struct lttng_condition *condition = NULL; | |
4276 | ||
4277 | condition = lttng_trigger_get_condition(trigger); | |
4278 | if (!condition) { | |
4279 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4280 | goto end; | |
4281 | } | |
4282 | ||
4283 | switch (lttng_condition_get_type(condition)) { | |
4284 | case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT: | |
4285 | { | |
4286 | struct lttng_event_rule *event_rule; | |
4287 | lttng_condition_event_rule_get_rule_mutable( | |
4288 | condition, &event_rule); | |
4289 | ret = lttng_event_rule_generate_filter_bytecode( | |
4290 | event_rule, lttng_credentials_get_uid(cmd_creds), lttng_credentials_get_gid(cmd_creds)); | |
4291 | if (ret != LTTNG_OK) { | |
4292 | goto end; | |
4293 | } | |
4294 | ||
4295 | /* Generate the capture bytecode set */ | |
4296 | ret = lttng_condition_event_rule_generate_capture_descriptor_bytecode_set( | |
4297 | condition, &trigger->capture_bytecode_set); | |
4298 | if (ret != LTTNG_OK) { | |
4299 | goto end; | |
4300 | } | |
4301 | ||
4302 | ret = LTTNG_OK; | |
4303 | break; | |
4304 | } | |
4305 | default: | |
4306 | { | |
4307 | ret = LTTNG_OK; | |
4308 | break; | |
4309 | } | |
4310 | } | |
4311 | ||
4312 | end: | |
4313 | return ret; | |
4314 | } | |
4315 | ||
b0880ae5 | 4316 | int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock, |
2463b787 JR |
4317 | struct notification_thread_handle *notification_thread, |
4318 | struct lttng_trigger **return_trigger) | |
b0880ae5 JG |
4319 | { |
4320 | int ret; | |
4321 | size_t trigger_len; | |
4322 | ssize_t sock_recv_len; | |
4323 | struct lttng_trigger *trigger = NULL; | |
c0a66c84 | 4324 | struct lttng_payload trigger_payload; |
3da864a9 | 4325 | struct lttng_credentials cmd_creds = { |
2463b787 JR |
4326 | .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid), |
4327 | .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid), | |
3da864a9 | 4328 | }; |
b0880ae5 | 4329 | |
c0a66c84 | 4330 | lttng_payload_init(&trigger_payload); |
3a91de3a | 4331 | trigger_len = (size_t) cmd_ctx->lsm.u.trigger.length; |
c0a66c84 JG |
4332 | ret = lttng_dynamic_buffer_set_size( |
4333 | &trigger_payload.buffer, trigger_len); | |
b0880ae5 JG |
4334 | if (ret) { |
4335 | ret = LTTNG_ERR_NOMEM; | |
4336 | goto end; | |
4337 | } | |
4338 | ||
c0a66c84 JG |
4339 | sock_recv_len = lttcomm_recv_unix_sock( |
4340 | sock, trigger_payload.buffer.data, trigger_len); | |
b0880ae5 JG |
4341 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { |
4342 | ERR("Failed to receive \"register trigger\" command payload"); | |
4343 | /* TODO: should this be a new error enum ? */ | |
4344 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4345 | goto end; | |
4346 | } | |
4347 | ||
99608320 JR |
4348 | /* Receive fds, if any. */ |
4349 | if (cmd_ctx->lsm.fd_count > 0) { | |
4350 | ret = lttcomm_recv_payload_fds_unix_sock( | |
4351 | sock, cmd_ctx->lsm.fd_count, &trigger_payload); | |
4352 | if (ret > 0 && ret != cmd_ctx->lsm.fd_count * sizeof(int)) { | |
4353 | ret = LTTNG_ERR_INVALID_PROTOCOL; | |
4354 | goto end; | |
4355 | } else if (ret <= 0) { | |
4356 | ret = LTTNG_ERR_FATAL; | |
4357 | goto end; | |
4358 | } | |
4359 | } | |
4360 | ||
4361 | /* Deserialize trigger. */ | |
c0a66c84 JG |
4362 | { |
4363 | struct lttng_payload_view view = | |
4364 | lttng_payload_view_from_payload( | |
4365 | &trigger_payload, 0, -1); | |
4366 | ||
4367 | if (lttng_trigger_create_from_payload(&view, &trigger) != | |
4368 | trigger_len) { | |
4369 | ERR("Invalid trigger payload received in \"register trigger\" command"); | |
4370 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4371 | goto end; | |
4372 | } | |
b0880ae5 JG |
4373 | } |
4374 | ||
2463b787 JR |
4375 | /* |
4376 | * Validate the trigger credentials against the command credentials. | |
4377 | * Only the root user can register a trigger with non-matching | |
4378 | * credentials. | |
4379 | */ | |
4380 | if (!lttng_credentials_is_equal_uid( | |
4381 | lttng_trigger_get_credentials(trigger), | |
4382 | &cmd_creds)) { | |
4383 | if (lttng_credentials_get_uid(&cmd_creds) != 0) { | |
4384 | ERR("Trigger credentials do not match the command credentials"); | |
4385 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4386 | goto end; | |
4387 | } | |
4388 | } | |
4389 | ||
4390 | /* | |
4391 | * Since we return the trigger object, take a reference to it | |
4392 | * Caller is responsible for calling lttng_destroy_trigger on it. | |
4393 | * This thread does not OWN the trigger. | |
4394 | */ | |
4395 | lttng_trigger_get(trigger); | |
4396 | ||
4397 | /* Prepare internal trigger object if needed on reception. | |
4398 | * Handles also special treatment for certain internal object of the | |
4399 | * trigger (e.g uprobe event rule binary fd. | |
4400 | */ | |
4401 | ret = prepare_trigger_object(trigger, &cmd_creds); | |
4402 | if (ret != LTTNG_OK) { | |
4403 | goto end; | |
4404 | } | |
3da864a9 JR |
4405 | |
4406 | /* Inform the notification thread */ | |
b0880ae5 JG |
4407 | ret = notification_thread_command_register_trigger(notification_thread, |
4408 | trigger); | |
2463b787 JR |
4409 | if (ret != LTTNG_OK) { |
4410 | goto end; | |
4411 | } | |
4412 | ||
4413 | /* Synchronize tracers, only if needed */ | |
4414 | /* TODO: maybe extract somewhere else */ | |
4415 | { | |
4416 | struct lttng_condition *condition = NULL; | |
4417 | condition = lttng_trigger_get_condition(trigger); | |
4418 | if (!condition) { | |
4419 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4420 | goto end; | |
4421 | } | |
4422 | ||
4423 | if (lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_EVENT_RULE_HIT) { | |
4424 | const struct lttng_event_rule *rule = NULL; | |
4425 | (void) lttng_condition_event_rule_get_rule(condition, &rule); | |
4426 | if (!rule) { | |
4427 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4428 | goto end; | |
4429 | } | |
4430 | if (lttng_event_rule_get_domain_type(rule) == LTTNG_DOMAIN_KERNEL) { | |
4431 | /* TODO: get the token value from the | |
4432 | * notification thread and only perform an | |
4433 | * enable and a disable.... This is NOT | |
4434 | * OPTIMIZED AT ALL | |
4435 | */ | |
4436 | ret = kernel_register_trigger(trigger, &cmd_creds); | |
4437 | if (ret != LTTNG_OK) { | |
4438 | enum lttng_error_code notif_thread_unregister_ret = | |
4439 | notification_thread_command_unregister_trigger( | |
4440 | notification_thread, | |
4441 | trigger); | |
4442 | if (notif_thread_unregister_ret != LTTNG_OK) { | |
4443 | ERR("Error unregistering notification thread trigger after kernel registration failure."); | |
4444 | } | |
4445 | goto end; | |
4446 | ||
4447 | } | |
4448 | } else { | |
4449 | /* TODO: get the token value from the | |
4450 | * notification thread and only perform an | |
4451 | * enable and a disable.... This is NOT | |
4452 | * OPTIMIZED AT ALL | |
4453 | */ | |
4454 | ust_app_global_update_all_tokens(); | |
4455 | /* Agent handling */ | |
4456 | if (lttng_event_rule_is_agent(rule)) { | |
4457 | struct agent *agt; | |
4458 | const char *pattern; | |
4459 | enum lttng_domain_type domain_type; | |
4460 | domain_type = lttng_event_rule_get_domain_type( | |
4461 | rule); | |
4462 | (void) lttng_event_rule_tracepoint_get_pattern( | |
4463 | rule, &pattern); | |
4464 | agt = trigger_find_agent(domain_type); | |
4465 | if (!agt) { | |
4466 | agt = agent_create(domain_type); | |
4467 | if (!agt) { | |
4468 | ret = LTTNG_ERR_NOMEM; | |
4469 | goto end; | |
4470 | } | |
4471 | agent_add(agt, trigger_agents_ht_by_domain); | |
4472 | } | |
4473 | ||
4474 | ret = trigger_agent_enable( | |
4475 | trigger, agt); | |
4476 | if (ret != LTTNG_OK) { | |
4477 | goto end; | |
4478 | } | |
4479 | } | |
4480 | } | |
4481 | } | |
4482 | } | |
4483 | ||
4484 | /* Return an image of the updated object to the client */ | |
4485 | *return_trigger = trigger; | |
4486 | /* Ownership of trigger was transferred to caller. */ | |
587f9fd0 | 4487 | trigger = NULL; |
b0880ae5 | 4488 | end: |
587f9fd0 | 4489 | lttng_trigger_destroy(trigger); |
c0a66c84 | 4490 | lttng_payload_reset(&trigger_payload); |
b0880ae5 JG |
4491 | return ret; |
4492 | } | |
4493 | ||
4494 | int cmd_unregister_trigger(struct command_ctx *cmd_ctx, int sock, | |
4495 | struct notification_thread_handle *notification_thread) | |
4496 | { | |
4497 | int ret; | |
4498 | size_t trigger_len; | |
4499 | ssize_t sock_recv_len; | |
4500 | struct lttng_trigger *trigger = NULL; | |
c0a66c84 | 4501 | struct lttng_payload trigger_payload; |
3da864a9 | 4502 | struct lttng_credentials cmd_creds = { |
2463b787 JR |
4503 | .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid), |
4504 | .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid), | |
3da864a9 | 4505 | }; |
b0880ae5 | 4506 | |
c0a66c84 | 4507 | lttng_payload_init(&trigger_payload); |
3a91de3a | 4508 | trigger_len = (size_t) cmd_ctx->lsm.u.trigger.length; |
c0a66c84 JG |
4509 | ret = lttng_dynamic_buffer_set_size( |
4510 | &trigger_payload.buffer, trigger_len); | |
b0880ae5 JG |
4511 | if (ret) { |
4512 | ret = LTTNG_ERR_NOMEM; | |
4513 | goto end; | |
4514 | } | |
4515 | ||
c0a66c84 JG |
4516 | sock_recv_len = lttcomm_recv_unix_sock( |
4517 | sock, trigger_payload.buffer.data, trigger_len); | |
b0880ae5 JG |
4518 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { |
4519 | ERR("Failed to receive \"unregister trigger\" command payload"); | |
4520 | /* TODO: should this be a new error enum ? */ | |
4521 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4522 | goto end; | |
4523 | } | |
4524 | ||
99608320 JR |
4525 | /* Receive fds, if any. */ |
4526 | if (cmd_ctx->lsm.fd_count > 0) { | |
4527 | ret = lttcomm_recv_payload_fds_unix_sock( | |
4528 | sock, cmd_ctx->lsm.fd_count, &trigger_payload); | |
4529 | if (ret > 0 && ret != cmd_ctx->lsm.fd_count * sizeof(int)) { | |
4530 | ret = LTTNG_ERR_INVALID_PROTOCOL; | |
4531 | goto end; | |
4532 | } else if (ret <= 0) { | |
4533 | ret = LTTNG_ERR_FATAL; | |
4534 | goto end; | |
4535 | } | |
4536 | } | |
4537 | ||
c0a66c84 JG |
4538 | { |
4539 | struct lttng_payload_view view = | |
4540 | lttng_payload_view_from_payload( | |
4541 | &trigger_payload, 0, -1); | |
4542 | ||
4543 | if (lttng_trigger_create_from_payload(&view, &trigger) != | |
4544 | trigger_len) { | |
4545 | ERR("Invalid trigger payload received in \"unregister trigger\" command"); | |
4546 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4547 | goto end; | |
4548 | } | |
b0880ae5 JG |
4549 | } |
4550 | ||
2463b787 JR |
4551 | /* |
4552 | * Validate the trigger credentials against the command credentials. | |
4553 | * Only the root user can unregister a trigger with non-matching | |
4554 | * credentials. | |
4555 | */ | |
4556 | if (!lttng_credentials_is_equal_uid( | |
4557 | lttng_trigger_get_credentials(trigger), | |
4558 | &cmd_creds)) { | |
4559 | if (lttng_credentials_get_uid(&cmd_creds) != 0) { | |
4560 | ERR("Trigger credentials do not match the command credentials"); | |
4561 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4562 | goto end; | |
4563 | } | |
4564 | } | |
4565 | ||
4566 | ret = prepare_trigger_object(trigger, &cmd_creds); | |
4567 | if (ret != LTTNG_OK) { | |
4568 | goto end; | |
4569 | } | |
3da864a9 | 4570 | |
b0880ae5 JG |
4571 | ret = notification_thread_command_unregister_trigger(notification_thread, |
4572 | trigger); | |
2463b787 JR |
4573 | |
4574 | /* Synchronize tracers, only if needed */ | |
4575 | /* TODO: maybe extract somewhere else */ | |
4576 | { | |
4577 | struct lttng_condition *condition = NULL; | |
4578 | condition = lttng_trigger_get_condition(trigger); | |
4579 | if (!condition) { | |
4580 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4581 | goto end; | |
4582 | } | |
4583 | ||
4584 | if (lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_EVENT_RULE_HIT) { | |
4585 | const struct lttng_event_rule *rule = NULL; | |
4586 | (void) lttng_condition_event_rule_get_rule(condition, &rule); | |
4587 | if (!rule) { | |
4588 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4589 | goto end; | |
4590 | } | |
4591 | if (lttng_event_rule_get_domain_type(rule) == LTTNG_DOMAIN_KERNEL) { | |
4592 | /* TODO: get the token value from the | |
4593 | * notification thread and only perform an | |
4594 | * enable and a disable.... This is NOT | |
4595 | * OPTIMIZED AT ALL | |
4596 | */ | |
4597 | ret = kernel_unregister_trigger(trigger); | |
4598 | } else { | |
4599 | /* TODO: get the token value from the | |
4600 | * notification thread and only perform an | |
4601 | * enable and a disable.... This is NOT | |
4602 | * OPTIMIZED AT ALL | |
4603 | */ | |
4604 | ust_app_global_update_all_tokens(); | |
4605 | if (lttng_event_rule_is_agent(rule)) { | |
4606 | struct agent *agt; | |
4607 | const char *pattern; | |
4608 | enum lttng_domain_type domain_type; | |
4609 | ||
4610 | domain_type = lttng_event_rule_get_domain_type( | |
4611 | rule); | |
4612 | (void) lttng_event_rule_tracepoint_get_pattern( | |
4613 | rule, &pattern); | |
4614 | ||
4615 | agt = trigger_find_agent(domain_type); | |
4616 | if (!agt) { | |
4617 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
4618 | goto end; | |
4619 | } | |
4620 | ret = trigger_agent_disable( | |
4621 | trigger, agt); | |
4622 | if (ret != LTTNG_OK) { | |
4623 | goto end; | |
4624 | } | |
4625 | } | |
4626 | } | |
4627 | } | |
4628 | } | |
4629 | ||
b0880ae5 | 4630 | end: |
587f9fd0 | 4631 | lttng_trigger_destroy(trigger); |
c0a66c84 | 4632 | lttng_payload_reset(&trigger_payload); |
b0880ae5 JG |
4633 | return ret; |
4634 | } | |
4635 | ||
2463b787 JR |
4636 | int cmd_list_triggers(struct command_ctx *cmd_ctx, |
4637 | struct notification_thread_handle *notification_thread, | |
4638 | struct lttng_triggers **return_triggers) | |
4639 | { | |
4640 | int ret = 0; | |
4641 | enum lttng_error_code ret_code; | |
4642 | struct lttng_triggers *triggers = NULL; | |
4643 | ||
4644 | /* Get list of token trigger from the notification thread here */ | |
4645 | ret_code = notification_thread_command_list_triggers(notification_thread, cmd_ctx->creds.uid, &triggers); | |
4646 | if (ret_code != LTTNG_OK) { | |
4647 | ret = ret_code; | |
4648 | goto end; | |
4649 | } | |
4650 | ||
4651 | /* Return a "view" of the current triggers */ | |
4652 | *return_triggers = triggers; | |
4653 | triggers = NULL; | |
4654 | ret = LTTNG_OK; | |
4655 | end: | |
4656 | lttng_triggers_destroy(triggers); | |
4657 | return ret; | |
4658 | } | |
6dc3064a DG |
4659 | /* |
4660 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
4661 | * snapshot output is *not* set with a remote destination. | |
4662 | * | |
9a654598 | 4663 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4664 | */ |
9a654598 | 4665 | static enum lttng_error_code set_relayd_for_snapshot( |
348a81dc | 4666 | struct consumer_output *output, |
fb9a95c4 | 4667 | const struct ltt_session *session) |
6dc3064a | 4668 | { |
9a654598 | 4669 | enum lttng_error_code status = LTTNG_OK; |
6dc3064a DG |
4670 | struct lttng_ht_iter iter; |
4671 | struct consumer_socket *socket; | |
1e791a74 | 4672 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
6fa5fe7c | 4673 | const char *base_path; |
6dc3064a | 4674 | |
348a81dc | 4675 | assert(output); |
6dc3064a DG |
4676 | assert(session); |
4677 | ||
4678 | DBG2("Set relayd object from snapshot output"); | |
4679 | ||
1e791a74 | 4680 | if (session->current_trace_chunk) { |
348a81dc JG |
4681 | enum lttng_trace_chunk_status chunk_status = |
4682 | lttng_trace_chunk_get_id( | |
4683 | session->current_trace_chunk, | |
4684 | ¤t_chunk_id.value); | |
1e791a74 | 4685 | |
348a81dc | 4686 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) { |
1e791a74 JG |
4687 | current_chunk_id.is_set = true; |
4688 | } else { | |
4689 | ERR("Failed to get current trace chunk id"); | |
4690 | status = LTTNG_ERR_UNK; | |
4691 | goto error; | |
4692 | } | |
4693 | } | |
4694 | ||
6dc3064a | 4695 | /* Ignore if snapshot consumer output is not network. */ |
348a81dc | 4696 | if (output->type != CONSUMER_DST_NET) { |
6dc3064a DG |
4697 | goto error; |
4698 | } | |
4699 | ||
6fa5fe7c MD |
4700 | /* |
4701 | * The snapshot record URI base path overrides the session | |
4702 | * base path. | |
4703 | */ | |
4704 | if (output->dst.net.control.subdir[0] != '\0') { | |
4705 | base_path = output->dst.net.control.subdir; | |
4706 | } else { | |
4707 | base_path = session->base_path; | |
4708 | } | |
4709 | ||
6dc3064a DG |
4710 | /* |
4711 | * For each consumer socket, create and send the relayd object of the | |
4712 | * snapshot output. | |
4713 | */ | |
4714 | rcu_read_lock(); | |
348a81dc | 4715 | cds_lfht_for_each_entry(output->socks->ht, &iter.iter, |
5eecee74 | 4716 | socket, node.node) { |
ecd0f96d | 4717 | pthread_mutex_lock(socket->lock); |
9a654598 | 4718 | status = send_consumer_relayd_sockets(0, session->id, |
348a81dc | 4719 | output, socket, |
d3e2ba59 | 4720 | session->name, session->hostname, |
6fa5fe7c | 4721 | base_path, |
1e791a74 | 4722 | session->live_timer, |
db1da059 | 4723 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
4724 | session->creation_time, |
4725 | session->name_contains_creation_time); | |
ecd0f96d | 4726 | pthread_mutex_unlock(socket->lock); |
9a654598 | 4727 | if (status != LTTNG_OK) { |
6dc3064a DG |
4728 | rcu_read_unlock(); |
4729 | goto error; | |
4730 | } | |
4731 | } | |
4732 | rcu_read_unlock(); | |
4733 | ||
4734 | error: | |
9a654598 | 4735 | return status; |
6dc3064a DG |
4736 | } |
4737 | ||
4738 | /* | |
4739 | * Record a kernel snapshot. | |
4740 | * | |
fac41e72 | 4741 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4742 | */ |
fb9a95c4 JG |
4743 | static enum lttng_error_code record_kernel_snapshot( |
4744 | struct ltt_kernel_session *ksess, | |
348a81dc | 4745 | const struct consumer_output *output, |
fb9a95c4 | 4746 | const struct ltt_session *session, |
d07ceecd | 4747 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a | 4748 | { |
9a654598 | 4749 | enum lttng_error_code status; |
6dc3064a DG |
4750 | |
4751 | assert(ksess); | |
4752 | assert(output); | |
4753 | assert(session); | |
4754 | ||
348a81dc JG |
4755 | status = kernel_snapshot_record( |
4756 | ksess, output, wait, nb_packets_per_stream); | |
9a654598 | 4757 | return status; |
6dc3064a DG |
4758 | } |
4759 | ||
4760 | /* | |
4761 | * Record a UST snapshot. | |
4762 | * | |
9a654598 | 4763 | * Returns LTTNG_OK on success or a LTTNG_ERR error code. |
6dc3064a | 4764 | */ |
9a654598 | 4765 | static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess, |
348a81dc JG |
4766 | const struct consumer_output *output, |
4767 | const struct ltt_session *session, | |
4768 | int wait, uint64_t nb_packets_per_stream) | |
6dc3064a | 4769 | { |
9a654598 | 4770 | enum lttng_error_code status; |
6dc3064a DG |
4771 | |
4772 | assert(usess); | |
4773 | assert(output); | |
4774 | assert(session); | |
4775 | ||
348a81dc JG |
4776 | status = ust_app_snapshot_record( |
4777 | usess, output, wait, nb_packets_per_stream); | |
9a654598 | 4778 | return status; |
6dc3064a DG |
4779 | } |
4780 | ||
d07ceecd | 4781 | static |
fb9a95c4 JG |
4782 | uint64_t get_session_size_one_more_packet_per_stream( |
4783 | const struct ltt_session *session, uint64_t cur_nr_packets) | |
68808f4e | 4784 | { |
d07ceecd | 4785 | uint64_t tot_size = 0; |
68808f4e DG |
4786 | |
4787 | if (session->kernel_session) { | |
4788 | struct ltt_kernel_channel *chan; | |
fb9a95c4 JG |
4789 | const struct ltt_kernel_session *ksess = |
4790 | session->kernel_session; | |
68808f4e | 4791 | |
68808f4e | 4792 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
4793 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
4794 | /* | |
4795 | * Don't take channel into account if we | |
4796 | * already grab all its packets. | |
4797 | */ | |
4798 | continue; | |
68808f4e | 4799 | } |
d07ceecd MD |
4800 | tot_size += chan->channel->attr.subbuf_size |
4801 | * chan->stream_count; | |
68808f4e DG |
4802 | } |
4803 | } | |
4804 | ||
4805 | if (session->ust_session) { | |
fb9a95c4 | 4806 | const struct ltt_ust_session *usess = session->ust_session; |
68808f4e | 4807 | |
d07ceecd MD |
4808 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
4809 | cur_nr_packets); | |
68808f4e DG |
4810 | } |
4811 | ||
d07ceecd | 4812 | return tot_size; |
68808f4e DG |
4813 | } |
4814 | ||
5c786ded | 4815 | /* |
d07ceecd MD |
4816 | * Calculate the number of packets we can grab from each stream that |
4817 | * fits within the overall snapshot max size. | |
4818 | * | |
4819 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
4820 | * the number of packets per stream. | |
4821 | * | |
4822 | * TODO: this approach is not perfect: we consider the worse case | |
4823 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
4824 | * better if we do this calculation while we actually grab the packet | |
4825 | * content: we would know how much padding we don't actually store into | |
4826 | * the file. | |
4827 | * | |
4828 | * This algorithm is currently bounded by the number of packets per | |
4829 | * stream. | |
4830 | * | |
4831 | * Since we call this algorithm before actually grabbing the data, it's | |
4832 | * an approximation: for instance, applications could appear/disappear | |
4833 | * in between this call and actually grabbing data. | |
5c786ded | 4834 | */ |
d07ceecd | 4835 | static |
fb9a95c4 JG |
4836 | int64_t get_session_nb_packets_per_stream(const struct ltt_session *session, |
4837 | uint64_t max_size) | |
5c786ded | 4838 | { |
d07ceecd MD |
4839 | int64_t size_left; |
4840 | uint64_t cur_nb_packets = 0; | |
5c786ded | 4841 | |
d07ceecd MD |
4842 | if (!max_size) { |
4843 | return 0; /* Infinite */ | |
5c786ded JD |
4844 | } |
4845 | ||
d07ceecd MD |
4846 | size_left = max_size; |
4847 | for (;;) { | |
4848 | uint64_t one_more_packet_tot_size; | |
5c786ded | 4849 | |
fb9a95c4 JG |
4850 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream( |
4851 | session, cur_nb_packets); | |
d07ceecd MD |
4852 | if (!one_more_packet_tot_size) { |
4853 | /* We are already grabbing all packets. */ | |
4854 | break; | |
4855 | } | |
4856 | size_left -= one_more_packet_tot_size; | |
4857 | if (size_left < 0) { | |
4858 | break; | |
4859 | } | |
4860 | cur_nb_packets++; | |
5c786ded | 4861 | } |
aecf2da5 | 4862 | if (!cur_nb_packets && size_left != max_size) { |
d07ceecd MD |
4863 | /* Not enough room to grab one packet of each stream, error. */ |
4864 | return -1; | |
4865 | } | |
4866 | return cur_nb_packets; | |
5c786ded JD |
4867 | } |
4868 | ||
fb9a95c4 | 4869 | static |
d2956687 | 4870 | enum lttng_error_code snapshot_record(struct ltt_session *session, |
fb9a95c4 JG |
4871 | const struct snapshot_output *snapshot_output, int wait) |
4872 | { | |
4873 | int64_t nb_packets_per_stream; | |
d2956687 | 4874 | char snapshot_chunk_name[LTTNG_NAME_MAX]; |
348a81dc JG |
4875 | int ret; |
4876 | enum lttng_error_code ret_code = LTTNG_OK; | |
d2956687 | 4877 | struct lttng_trace_chunk *snapshot_trace_chunk; |
348a81dc JG |
4878 | struct consumer_output *original_ust_consumer_output = NULL; |
4879 | struct consumer_output *original_kernel_consumer_output = NULL; | |
4880 | struct consumer_output *snapshot_ust_consumer_output = NULL; | |
4881 | struct consumer_output *snapshot_kernel_consumer_output = NULL; | |
d2956687 | 4882 | |
348a81dc | 4883 | ret = snprintf(snapshot_chunk_name, sizeof(snapshot_chunk_name), |
d2956687 JG |
4884 | "%s-%s-%" PRIu64, |
4885 | snapshot_output->name, | |
4886 | snapshot_output->datetime, | |
4887 | snapshot_output->nb_snapshot); | |
348a81dc | 4888 | if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) { |
d2956687 | 4889 | ERR("Failed to format snapshot name"); |
348a81dc JG |
4890 | ret_code = LTTNG_ERR_INVALID; |
4891 | goto error; | |
d2956687 JG |
4892 | } |
4893 | DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"", | |
4894 | snapshot_output->name, session->name, | |
4895 | snapshot_chunk_name); | |
348a81dc JG |
4896 | if (!session->kernel_session && !session->ust_session) { |
4897 | ERR("Failed to record snapshot as no channels exist"); | |
4898 | ret_code = LTTNG_ERR_NO_CHANNEL; | |
4899 | goto error; | |
4900 | } | |
4901 | ||
4902 | if (session->kernel_session) { | |
4903 | original_kernel_consumer_output = | |
4904 | session->kernel_session->consumer; | |
4905 | snapshot_kernel_consumer_output = | |
4906 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4907 | strcpy(snapshot_kernel_consumer_output->chunk_path, |
4908 | snapshot_chunk_name); | |
348a81dc JG |
4909 | ret = consumer_copy_sockets(snapshot_kernel_consumer_output, |
4910 | original_kernel_consumer_output); | |
4911 | if (ret < 0) { | |
4912 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4913 | ret_code = LTTNG_ERR_NOMEM; | |
4914 | goto error; | |
4915 | } | |
4916 | ret_code = set_relayd_for_snapshot( | |
4917 | snapshot_kernel_consumer_output, session); | |
4918 | if (ret_code != LTTNG_OK) { | |
4919 | ERR("Failed to setup relay daemon for kernel tracer snapshot"); | |
4920 | goto error; | |
4921 | } | |
4922 | session->kernel_session->consumer = | |
4923 | snapshot_kernel_consumer_output; | |
4924 | } | |
4925 | if (session->ust_session) { | |
4926 | original_ust_consumer_output = session->ust_session->consumer; | |
4927 | snapshot_ust_consumer_output = | |
4928 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4929 | strcpy(snapshot_ust_consumer_output->chunk_path, |
4930 | snapshot_chunk_name); | |
348a81dc JG |
4931 | ret = consumer_copy_sockets(snapshot_ust_consumer_output, |
4932 | original_ust_consumer_output); | |
4933 | if (ret < 0) { | |
4934 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4935 | ret_code = LTTNG_ERR_NOMEM; | |
4936 | goto error; | |
4937 | } | |
4938 | ret_code = set_relayd_for_snapshot( | |
4939 | snapshot_ust_consumer_output, session); | |
4940 | if (ret_code != LTTNG_OK) { | |
4941 | ERR("Failed to setup relay daemon for userspace tracer snapshot"); | |
4942 | goto error; | |
4943 | } | |
4944 | session->ust_session->consumer = | |
4945 | snapshot_ust_consumer_output; | |
4946 | } | |
4947 | ||
d2956687 | 4948 | snapshot_trace_chunk = session_create_new_trace_chunk(session, |
348a81dc JG |
4949 | snapshot_kernel_consumer_output ?: |
4950 | snapshot_ust_consumer_output, | |
4951 | consumer_output_get_base_path( | |
4952 | snapshot_output->consumer), | |
d2956687 JG |
4953 | snapshot_chunk_name); |
4954 | if (!snapshot_trace_chunk) { | |
348a81dc JG |
4955 | ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"", |
4956 | session->name); | |
4957 | ret_code = LTTNG_ERR_CREATE_DIR_FAIL; | |
4958 | goto error; | |
d2956687 JG |
4959 | } |
4960 | assert(!session->current_trace_chunk); | |
4961 | ret = session_set_trace_chunk(session, snapshot_trace_chunk, NULL); | |
4962 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
4963 | snapshot_trace_chunk = NULL; | |
4964 | if (ret) { | |
348a81dc JG |
4965 | ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"", |
4966 | session->name); | |
4967 | ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
4968 | goto error; | |
d2956687 | 4969 | } |
fb9a95c4 JG |
4970 | |
4971 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
4972 | snapshot_output->max_size); | |
4973 | if (nb_packets_per_stream < 0) { | |
348a81dc | 4974 | ret_code = LTTNG_ERR_MAX_SIZE_INVALID; |
5151d412 | 4975 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4976 | } |
4977 | ||
4978 | if (session->kernel_session) { | |
348a81dc JG |
4979 | ret_code = record_kernel_snapshot(session->kernel_session, |
4980 | snapshot_kernel_consumer_output, session, | |
fb9a95c4 | 4981 | wait, nb_packets_per_stream); |
348a81dc | 4982 | if (ret_code != LTTNG_OK) { |
5151d412 | 4983 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4984 | } |
4985 | } | |
4986 | ||
4987 | if (session->ust_session) { | |
348a81dc JG |
4988 | ret_code = record_ust_snapshot(session->ust_session, |
4989 | snapshot_ust_consumer_output, session, | |
fb9a95c4 | 4990 | wait, nb_packets_per_stream); |
348a81dc | 4991 | if (ret_code != LTTNG_OK) { |
5151d412 | 4992 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4993 | } |
4994 | } | |
d2956687 | 4995 | |
5151d412 | 4996 | error_close_trace_chunk: |
dbfee52c MD |
4997 | if (session_set_trace_chunk(session, NULL, &snapshot_trace_chunk)) { |
4998 | ERR("Failed to release the current trace chunk of session \"%s\"", | |
4999 | session->name); | |
5000 | ret_code = LTTNG_ERR_UNK; | |
5001 | } | |
5002 | ||
5003 | if (session_close_trace_chunk(session, snapshot_trace_chunk, | |
343defc2 | 5004 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) { |
d2956687 JG |
5005 | /* |
5006 | * Don't goto end; make sure the chunk is closed for the session | |
5007 | * to allow future snapshots. | |
5008 | */ | |
5009 | ERR("Failed to close snapshot trace chunk of session \"%s\"", | |
5010 | session->name); | |
348a81dc | 5011 | ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; |
d2956687 | 5012 | } |
348a81dc JG |
5013 | error: |
5014 | if (original_ust_consumer_output) { | |
5015 | session->ust_session->consumer = original_ust_consumer_output; | |
5016 | } | |
5017 | if (original_kernel_consumer_output) { | |
5018 | session->kernel_session->consumer = | |
5019 | original_kernel_consumer_output; | |
5020 | } | |
5021 | consumer_output_put(snapshot_ust_consumer_output); | |
5022 | consumer_output_put(snapshot_kernel_consumer_output); | |
5023 | return ret_code; | |
fb9a95c4 JG |
5024 | } |
5025 | ||
6dc3064a DG |
5026 | /* |
5027 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
5028 | * | |
5029 | * The wait parameter is ignored so this call always wait for the snapshot to | |
5030 | * complete before returning. | |
5031 | * | |
5032 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
5033 | */ | |
5034 | int cmd_snapshot_record(struct ltt_session *session, | |
df4f5a87 | 5035 | const struct lttng_snapshot_output *output, int wait) |
6dc3064a | 5036 | { |
9a654598 JG |
5037 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5038 | int ret; | |
00e1dfc4 | 5039 | unsigned int snapshot_success = 0; |
10ba83fe | 5040 | char datetime[16]; |
2abe7969 | 5041 | struct snapshot_output *tmp_output = NULL; |
6dc3064a DG |
5042 | |
5043 | assert(session); | |
ba45d9f0 | 5044 | assert(output); |
6dc3064a DG |
5045 | |
5046 | DBG("Cmd snapshot record for session %s", session->name); | |
5047 | ||
10ba83fe JR |
5048 | /* Get the datetime for the snapshot output directory. */ |
5049 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
5050 | sizeof(datetime)); | |
5051 | if (!ret) { | |
9a654598 | 5052 | cmd_ret = LTTNG_ERR_INVALID; |
10ba83fe JR |
5053 | goto error; |
5054 | } | |
5055 | ||
6dc3064a | 5056 | /* |
d3f14b8a MD |
5057 | * Permission denied to create an output if the session is not |
5058 | * set in no output mode. | |
6dc3064a DG |
5059 | */ |
5060 | if (session->output_traces) { | |
9a654598 | 5061 | cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
5062 | goto error; |
5063 | } | |
5064 | ||
5065 | /* The session needs to be started at least once. */ | |
8382cf6f | 5066 | if (!session->has_been_started) { |
9a654598 | 5067 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
6dc3064a DG |
5068 | goto error; |
5069 | } | |
5070 | ||
5071 | /* Use temporary output for the session. */ | |
ba45d9f0 | 5072 | if (*output->ctrl_url != '\0') { |
2abe7969 JG |
5073 | tmp_output = snapshot_output_alloc(); |
5074 | if (!tmp_output) { | |
5075 | cmd_ret = LTTNG_ERR_NOMEM; | |
5076 | goto error; | |
5077 | } | |
5078 | ||
b178f53e JG |
5079 | ret = snapshot_output_init(session, output->max_size, |
5080 | output->name, | |
5081 | output->ctrl_url, output->data_url, | |
5082 | session->consumer, | |
2abe7969 | 5083 | tmp_output, NULL); |
6dc3064a DG |
5084 | if (ret < 0) { |
5085 | if (ret == -ENOMEM) { | |
9a654598 | 5086 | cmd_ret = LTTNG_ERR_NOMEM; |
6dc3064a | 5087 | } else { |
9a654598 | 5088 | cmd_ret = LTTNG_ERR_INVALID; |
6dc3064a DG |
5089 | } |
5090 | goto error; | |
5091 | } | |
1bfe7328 | 5092 | /* Use the global session count for the temporary snapshot. */ |
2abe7969 | 5093 | tmp_output->nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe JR |
5094 | |
5095 | /* Use the global datetime */ | |
2abe7969 JG |
5096 | memcpy(tmp_output->datetime, datetime, sizeof(datetime)); |
5097 | cmd_ret = snapshot_record(session, tmp_output, wait); | |
fb9a95c4 | 5098 | if (cmd_ret != LTTNG_OK) { |
804c90a8 JR |
5099 | goto error; |
5100 | } | |
804c90a8 JR |
5101 | snapshot_success = 1; |
5102 | } else { | |
5103 | struct snapshot_output *sout; | |
5104 | struct lttng_ht_iter iter; | |
68808f4e | 5105 | |
804c90a8 JR |
5106 | rcu_read_lock(); |
5107 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
5108 | &iter.iter, sout, node.node) { | |
2abe7969 JG |
5109 | struct snapshot_output output_copy; |
5110 | ||
804c90a8 | 5111 | /* |
2abe7969 JG |
5112 | * Make a local copy of the output and override output |
5113 | * parameters with those provided as part of the | |
5114 | * command. | |
804c90a8 | 5115 | */ |
2abe7969 | 5116 | memcpy(&output_copy, sout, sizeof(output_copy)); |
1bfe7328 | 5117 | |
804c90a8 | 5118 | if (output->max_size != (uint64_t) -1ULL) { |
2abe7969 | 5119 | output_copy.max_size = output->max_size; |
6dc3064a | 5120 | } |
d07ceecd | 5121 | |
2abe7969 JG |
5122 | output_copy.nb_snapshot = session->snapshot.nb_snapshot; |
5123 | memcpy(output_copy.datetime, datetime, | |
5124 | sizeof(datetime)); | |
6dc3064a | 5125 | |
804c90a8 JR |
5126 | /* Use temporary name. */ |
5127 | if (*output->name != '\0') { | |
2abe7969 JG |
5128 | if (lttng_strncpy(output_copy.name, |
5129 | output->name, | |
5130 | sizeof(output_copy.name))) { | |
9a654598 | 5131 | cmd_ret = LTTNG_ERR_INVALID; |
cf3e357d MD |
5132 | rcu_read_unlock(); |
5133 | goto error; | |
5134 | } | |
804c90a8 | 5135 | } |
e1986656 | 5136 | |
2abe7969 | 5137 | cmd_ret = snapshot_record(session, &output_copy, wait); |
fb9a95c4 JG |
5138 | if (cmd_ret != LTTNG_OK) { |
5139 | rcu_read_unlock(); | |
5140 | goto error; | |
6dc3064a | 5141 | } |
804c90a8 | 5142 | snapshot_success = 1; |
6dc3064a | 5143 | } |
804c90a8 | 5144 | rcu_read_unlock(); |
6dc3064a DG |
5145 | } |
5146 | ||
1bfe7328 DG |
5147 | if (snapshot_success) { |
5148 | session->snapshot.nb_snapshot++; | |
b67578cb | 5149 | } else { |
9a654598 | 5150 | cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL; |
1bfe7328 DG |
5151 | } |
5152 | ||
6dc3064a | 5153 | error: |
2abe7969 JG |
5154 | if (tmp_output) { |
5155 | snapshot_output_destroy(tmp_output); | |
5156 | } | |
9a654598 | 5157 | return cmd_ret; |
6dc3064a DG |
5158 | } |
5159 | ||
d7ba1388 MD |
5160 | /* |
5161 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
5162 | */ | |
5163 | int cmd_set_session_shm_path(struct ltt_session *session, | |
5164 | const char *shm_path) | |
5165 | { | |
5166 | /* Safety net */ | |
5167 | assert(session); | |
5168 | ||
5169 | /* | |
5170 | * Can only set shm path before session is started. | |
5171 | */ | |
5172 | if (session->has_been_started) { | |
5173 | return LTTNG_ERR_SESSION_STARTED; | |
5174 | } | |
5175 | ||
5176 | strncpy(session->shm_path, shm_path, | |
5177 | sizeof(session->shm_path)); | |
5178 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
5179 | ||
5180 | return 0; | |
5181 | } | |
5182 | ||
5c408ad8 JD |
5183 | /* |
5184 | * Command LTTNG_ROTATE_SESSION from the lttng-ctl library. | |
5185 | * | |
5186 | * Ask the consumer to rotate the session output directory. | |
5187 | * The session lock must be held. | |
5188 | * | |
d5a1b7aa | 5189 | * Returns LTTNG_OK on success or else a negative LTTng error code. |
5c408ad8 JD |
5190 | */ |
5191 | int cmd_rotate_session(struct ltt_session *session, | |
7fdbed1c | 5192 | struct lttng_rotate_session_return *rotate_return, |
343defc2 MD |
5193 | bool quiet_rotation, |
5194 | enum lttng_trace_chunk_command_type command) | |
5c408ad8 JD |
5195 | { |
5196 | int ret; | |
d2956687 | 5197 | uint64_t ongoing_rotation_chunk_id; |
d5a1b7aa | 5198 | enum lttng_error_code cmd_ret = LTTNG_OK; |
d2956687 JG |
5199 | struct lttng_trace_chunk *chunk_being_archived = NULL; |
5200 | struct lttng_trace_chunk *new_trace_chunk = NULL; | |
5201 | enum lttng_trace_chunk_status chunk_status; | |
3156892b JG |
5202 | bool failed_to_rotate = false; |
5203 | enum lttng_error_code rotation_fail_code = LTTNG_OK; | |
5c408ad8 JD |
5204 | |
5205 | assert(session); | |
5206 | ||
5207 | if (!session->has_been_started) { | |
d5a1b7aa | 5208 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
d68c9a04 | 5209 | goto end; |
5c408ad8 JD |
5210 | } |
5211 | ||
d48d65e1 MD |
5212 | /* |
5213 | * Explicit rotation is not supported for live sessions. | |
5214 | * However, live sessions can perform a quiet rotation on | |
5215 | * destroy. | |
5216 | * Rotation is not supported for snapshot traces (no output). | |
5217 | */ | |
5218 | if ((!quiet_rotation && session->live_timer) || | |
5219 | !session->output_traces) { | |
d5a1b7aa | 5220 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
d68c9a04 | 5221 | goto end; |
5c408ad8 JD |
5222 | } |
5223 | ||
d2956687 | 5224 | /* Unsupported feature in lttng-relayd before 2.11. */ |
070b6a86 | 5225 | if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET && |
5c408ad8 JD |
5226 | (session->consumer->relay_major_version == 2 && |
5227 | session->consumer->relay_minor_version < 11)) { | |
d5a1b7aa | 5228 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY; |
d68c9a04 | 5229 | goto end; |
5c408ad8 JD |
5230 | } |
5231 | ||
a40a503f MD |
5232 | /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */ |
5233 | if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) { | |
5234 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL; | |
5235 | goto end; | |
5236 | } | |
5237 | ||
92816cc3 | 5238 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
92816cc3 JG |
5239 | DBG("Refusing to launch a rotation; a rotation is already in progress for session %s", |
5240 | session->name); | |
d5a1b7aa | 5241 | cmd_ret = LTTNG_ERR_ROTATION_PENDING; |
d68c9a04 | 5242 | goto end; |
5c408ad8 JD |
5243 | } |
5244 | ||
5245 | /* | |
5246 | * After a stop, we only allow one rotation to occur, the other ones are | |
5247 | * useless until a new start. | |
5248 | */ | |
5249 | if (session->rotated_after_last_stop) { | |
5250 | DBG("Session \"%s\" was already rotated after stop, refusing rotation", | |
5251 | session->name); | |
d5a1b7aa | 5252 | cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; |
d68c9a04 | 5253 | goto end; |
5c408ad8 | 5254 | } |
b02f5986 MD |
5255 | |
5256 | /* | |
5257 | * After a stop followed by a clear, disallow following rotations a they would | |
5258 | * generate empty chunks. | |
5259 | */ | |
5260 | if (session->cleared_after_last_stop) { | |
5261 | DBG("Session \"%s\" was already cleared after stop, refusing rotation", | |
5262 | session->name); | |
5263 | cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR; | |
5264 | goto end; | |
5265 | } | |
5266 | ||
d2956687 | 5267 | if (session->active) { |
348a81dc | 5268 | new_trace_chunk = session_create_new_trace_chunk(session, NULL, |
d2956687 JG |
5269 | NULL, NULL); |
5270 | if (!new_trace_chunk) { | |
5271 | cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
5272 | goto error; | |
5c408ad8 | 5273 | } |
0e270a1e | 5274 | } |
2961f09e | 5275 | |
3156892b JG |
5276 | /* |
5277 | * The current trace chunk becomes the chunk being archived. | |
5278 | * | |
5279 | * After this point, "chunk_being_archived" must absolutely | |
5280 | * be closed on the consumer(s), otherwise it will never be | |
5281 | * cleaned-up, which will result in a leak. | |
5282 | */ | |
d2956687 JG |
5283 | ret = session_set_trace_chunk(session, new_trace_chunk, |
5284 | &chunk_being_archived); | |
5285 | if (ret) { | |
5286 | cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
b178f53e JG |
5287 | goto error; |
5288 | } | |
5289 | ||
5c408ad8 | 5290 | if (session->kernel_session) { |
d5a1b7aa JG |
5291 | cmd_ret = kernel_rotate_session(session); |
5292 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5293 | failed_to_rotate = true; |
5294 | rotation_fail_code = cmd_ret; | |
5c408ad8 JD |
5295 | } |
5296 | } | |
5297 | if (session->ust_session) { | |
d5a1b7aa JG |
5298 | cmd_ret = ust_app_rotate_session(session); |
5299 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5300 | failed_to_rotate = true; |
5301 | rotation_fail_code = cmd_ret; | |
5c408ad8 | 5302 | } |
92816cc3 | 5303 | } |
17dd1232 | 5304 | |
3b61d9ee JG |
5305 | if (!session->active) { |
5306 | session->rotated_after_last_stop = true; | |
5307 | } | |
5308 | ||
5309 | if (!chunk_being_archived) { | |
5310 | DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check", | |
5311 | session->name); | |
5312 | if (failed_to_rotate) { | |
5313 | cmd_ret = rotation_fail_code; | |
5314 | goto error; | |
5315 | } | |
5316 | cmd_ret = LTTNG_OK; | |
5317 | goto end; | |
5318 | } | |
5319 | ||
5320 | session->rotation_state = LTTNG_ROTATION_STATE_ONGOING; | |
5321 | chunk_status = lttng_trace_chunk_get_id(chunk_being_archived, | |
5322 | &ongoing_rotation_chunk_id); | |
5323 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5324 | ||
bbc4768c | 5325 | ret = session_close_trace_chunk(session, chunk_being_archived, |
343defc2 | 5326 | command, session->last_chunk_path); |
d2956687 JG |
5327 | if (ret) { |
5328 | cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; | |
5329 | goto error; | |
5330 | } | |
5331 | ||
3156892b JG |
5332 | if (failed_to_rotate) { |
5333 | cmd_ret = rotation_fail_code; | |
5334 | goto error; | |
5335 | } | |
5336 | ||
7fdbed1c | 5337 | session->quiet_rotation = quiet_rotation; |
92816cc3 JG |
5338 | ret = timer_session_rotation_pending_check_start(session, |
5339 | DEFAULT_ROTATE_PENDING_TIMER); | |
5340 | if (ret) { | |
d5a1b7aa | 5341 | cmd_ret = LTTNG_ERR_UNK; |
2961f09e | 5342 | goto error; |
5c408ad8 JD |
5343 | } |
5344 | ||
5c408ad8 | 5345 | if (rotate_return) { |
d2956687 | 5346 | rotate_return->rotation_id = ongoing_rotation_chunk_id; |
5c408ad8 JD |
5347 | } |
5348 | ||
d2956687 JG |
5349 | session->chunk_being_archived = chunk_being_archived; |
5350 | chunk_being_archived = NULL; | |
7fdbed1c JG |
5351 | if (!quiet_rotation) { |
5352 | ret = notification_thread_command_session_rotation_ongoing( | |
5353 | notification_thread_handle, | |
5354 | session->name, session->uid, session->gid, | |
5355 | ongoing_rotation_chunk_id); | |
5356 | if (ret != LTTNG_OK) { | |
5357 | ERR("Failed to notify notification thread that a session rotation is ongoing for session %s", | |
5358 | session->name); | |
5359 | cmd_ret = ret; | |
5360 | } | |
2961f09e JG |
5361 | } |
5362 | ||
92816cc3 | 5363 | DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent", |
d2956687 | 5364 | session->name, ongoing_rotation_chunk_id); |
5c408ad8 | 5365 | end: |
d2956687 JG |
5366 | lttng_trace_chunk_put(new_trace_chunk); |
5367 | lttng_trace_chunk_put(chunk_being_archived); | |
d5a1b7aa | 5368 | ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret); |
5c408ad8 | 5369 | return ret; |
2961f09e | 5370 | error: |
2961f09e | 5371 | if (session_reset_rotation_state(session, |
d2956687 | 5372 | LTTNG_ROTATION_STATE_ERROR)) { |
2961f09e JG |
5373 | ERR("Failed to reset rotation state of session \"%s\"", |
5374 | session->name); | |
5375 | } | |
5376 | goto end; | |
5c408ad8 JD |
5377 | } |
5378 | ||
5379 | /* | |
d68c9a04 | 5380 | * Command LTTNG_ROTATION_GET_INFO from the lttng-ctl library. |
5c408ad8 JD |
5381 | * |
5382 | * Check if the session has finished its rotation. | |
5383 | * | |
d2956687 | 5384 | * Return LTTNG_OK on success or else an LTTNG_ERR code. |
5c408ad8 | 5385 | */ |
d68c9a04 JD |
5386 | int cmd_rotate_get_info(struct ltt_session *session, |
5387 | struct lttng_rotation_get_info_return *info_return, | |
5388 | uint64_t rotation_id) | |
5c408ad8 | 5389 | { |
d2956687 JG |
5390 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5391 | enum lttng_rotation_state rotation_state; | |
5c408ad8 | 5392 | |
d68c9a04 | 5393 | DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, session->name, |
d2956687 | 5394 | session->most_recent_chunk_id.value); |
5c408ad8 | 5395 | |
d2956687 JG |
5396 | if (session->chunk_being_archived) { |
5397 | enum lttng_trace_chunk_status chunk_status; | |
5398 | uint64_t chunk_id; | |
5399 | ||
5400 | chunk_status = lttng_trace_chunk_get_id( | |
5401 | session->chunk_being_archived, | |
5402 | &chunk_id); | |
5403 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5404 | ||
5405 | rotation_state = rotation_id == chunk_id ? | |
5406 | LTTNG_ROTATION_STATE_ONGOING : | |
5407 | LTTNG_ROTATION_STATE_EXPIRED; | |
5408 | } else { | |
5409 | if (session->last_archived_chunk_id.is_set && | |
5410 | rotation_id != session->last_archived_chunk_id.value) { | |
5411 | rotation_state = LTTNG_ROTATION_STATE_EXPIRED; | |
5412 | } else { | |
5413 | rotation_state = session->rotation_state; | |
5414 | } | |
5c408ad8 JD |
5415 | } |
5416 | ||
d2956687 JG |
5417 | switch (rotation_state) { |
5418 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
83ed9e90 | 5419 | DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"", |
d2956687 JG |
5420 | session->name); |
5421 | goto end; | |
5422 | case LTTNG_ROTATION_STATE_EXPIRED: | |
5423 | DBG("Reporting that the rotation state of rotation id %" PRIu64 " of session \"%s\" has expired", | |
5424 | rotation_id, session->name); | |
5425 | break; | |
d68c9a04 | 5426 | case LTTNG_ROTATION_STATE_ONGOING: |
d2956687 | 5427 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending", |
d68c9a04 JD |
5428 | rotation_id, session->name); |
5429 | break; | |
5430 | case LTTNG_ROTATION_STATE_COMPLETED: | |
dd73d57b | 5431 | { |
d2956687 JG |
5432 | int fmt_ret; |
5433 | char *chunk_path; | |
dd73d57b JG |
5434 | char *current_tracing_path_reply; |
5435 | size_t current_tracing_path_reply_len; | |
5436 | ||
d2956687 JG |
5437 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed", |
5438 | rotation_id, session->name); | |
5439 | ||
dd73d57b JG |
5440 | switch (session_get_consumer_destination_type(session)) { |
5441 | case CONSUMER_DST_LOCAL: | |
5442 | current_tracing_path_reply = | |
5443 | info_return->location.local.absolute_path; | |
5444 | current_tracing_path_reply_len = | |
5445 | sizeof(info_return->location.local.absolute_path); | |
5446 | info_return->location_type = | |
05f8afa9 | 5447 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL; |
ecd1a12f MD |
5448 | fmt_ret = asprintf(&chunk_path, |
5449 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", | |
5450 | session_get_base_path(session), | |
5451 | session->last_archived_chunk_name); | |
5452 | if (fmt_ret == -1) { | |
5453 | PERROR("Failed to format the path of the last archived trace chunk"); | |
5454 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5455 | cmd_ret = LTTNG_ERR_UNK; | |
5456 | goto end; | |
5457 | } | |
dd73d57b JG |
5458 | break; |
5459 | case CONSUMER_DST_NET: | |
09cfbe47 JG |
5460 | { |
5461 | uint16_t ctrl_port, data_port; | |
5462 | ||
dd73d57b JG |
5463 | current_tracing_path_reply = |
5464 | info_return->location.relay.relative_path; | |
5465 | current_tracing_path_reply_len = | |
5466 | sizeof(info_return->location.relay.relative_path); | |
5467 | /* Currently the only supported relay protocol. */ | |
5468 | info_return->location.relay.protocol = | |
05f8afa9 | 5469 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP; |
dd73d57b | 5470 | |
d2956687 | 5471 | fmt_ret = lttng_strncpy(info_return->location.relay.host, |
dd73d57b JG |
5472 | session_get_net_consumer_hostname(session), |
5473 | sizeof(info_return->location.relay.host)); | |
d2956687 JG |
5474 | if (fmt_ret) { |
5475 | ERR("Failed to copy host name to rotate_get_info reply"); | |
dd73d57b | 5476 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5477 | cmd_ret = LTTNG_ERR_SET_URL; |
dd73d57b JG |
5478 | goto end; |
5479 | } | |
5480 | ||
09cfbe47 JG |
5481 | session_get_net_consumer_ports(session, &ctrl_port, &data_port); |
5482 | info_return->location.relay.ports.control = ctrl_port; | |
5483 | info_return->location.relay.ports.data = data_port; | |
dd73d57b | 5484 | info_return->location_type = |
05f8afa9 | 5485 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY; |
ecd1a12f MD |
5486 | chunk_path = strdup(session->last_chunk_path); |
5487 | if (!chunk_path) { | |
5488 | ERR("Failed to allocate the path of the last archived trace chunk"); | |
5489 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5490 | cmd_ret = LTTNG_ERR_UNK; | |
5491 | goto end; | |
5492 | } | |
dd73d57b | 5493 | break; |
09cfbe47 | 5494 | } |
dd73d57b JG |
5495 | default: |
5496 | abort(); | |
5497 | } | |
d2956687 JG |
5498 | |
5499 | fmt_ret = lttng_strncpy(current_tracing_path_reply, | |
5500 | chunk_path, current_tracing_path_reply_len); | |
5501 | free(chunk_path); | |
5502 | if (fmt_ret) { | |
5503 | ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply"); | |
d68c9a04 | 5504 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5505 | cmd_ret = LTTNG_ERR_UNK; |
5c408ad8 JD |
5506 | goto end; |
5507 | } | |
dd73d57b | 5508 | |
d68c9a04 | 5509 | break; |
dd73d57b | 5510 | } |
d68c9a04 | 5511 | case LTTNG_ROTATION_STATE_ERROR: |
d2956687 | 5512 | DBG("Reporting that an error occurred during rotation %" PRIu64 " of session \"%s\"", |
d68c9a04 JD |
5513 | rotation_id, session->name); |
5514 | break; | |
5515 | default: | |
5516 | abort(); | |
5c408ad8 JD |
5517 | } |
5518 | ||
d2956687 | 5519 | cmd_ret = LTTNG_OK; |
5c408ad8 | 5520 | end: |
d2956687 JG |
5521 | info_return->status = (int32_t) rotation_state; |
5522 | return cmd_ret; | |
5c408ad8 JD |
5523 | } |
5524 | ||
259c2674 JD |
5525 | /* |
5526 | * Command LTTNG_ROTATION_SET_SCHEDULE from the lttng-ctl library. | |
5527 | * | |
5528 | * Configure the automatic rotation parameters. | |
66ea93b1 JG |
5529 | * 'activate' to true means activate the rotation schedule type with 'new_value'. |
5530 | * 'activate' to false means deactivate the rotation schedule and validate that | |
5531 | * 'new_value' has the same value as the currently active value. | |
259c2674 | 5532 | * |
66ea93b1 | 5533 | * Return 0 on success or else a positive LTTNG_ERR code. |
259c2674 JD |
5534 | */ |
5535 | int cmd_rotation_set_schedule(struct ltt_session *session, | |
66ea93b1 JG |
5536 | bool activate, enum lttng_rotation_schedule_type schedule_type, |
5537 | uint64_t new_value, | |
90936dcf | 5538 | struct notification_thread_handle *notification_thread_handle) |
259c2674 JD |
5539 | { |
5540 | int ret; | |
66ea93b1 | 5541 | uint64_t *parameter_value; |
259c2674 JD |
5542 | |
5543 | assert(session); | |
5544 | ||
5545 | DBG("Cmd rotate set schedule session %s", session->name); | |
5546 | ||
92fe5ca1 | 5547 | if (session->live_timer || !session->output_traces) { |
66ea93b1 | 5548 | DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session"); |
259c2674 JD |
5549 | ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
5550 | goto end; | |
5551 | } | |
5552 | ||
66ea93b1 JG |
5553 | switch (schedule_type) { |
5554 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5555 | parameter_value = &session->rotate_size; | |
5556 | break; | |
5557 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5558 | parameter_value = &session->rotate_timer_period; | |
5559 | if (new_value >= UINT_MAX) { | |
5560 | DBG("Failing ROTATION_SET_SCHEDULE command as the value requested for a periodic rotation schedule is invalid: %" PRIu64 " > %u (UINT_MAX)", | |
5561 | new_value, UINT_MAX); | |
5562 | ret = LTTNG_ERR_INVALID; | |
5563 | goto end; | |
5564 | } | |
5565 | break; | |
5566 | default: | |
5567 | WARN("Failing ROTATION_SET_SCHEDULE command on unknown schedule type"); | |
5568 | ret = LTTNG_ERR_INVALID; | |
259c2674 | 5569 | goto end; |
66ea93b1 JG |
5570 | } |
5571 | ||
5572 | /* Improper use of the API. */ | |
5573 | if (new_value == -1ULL) { | |
5574 | WARN("Failing ROTATION_SET_SCHEDULE command as the value requested is -1"); | |
5575 | ret = LTTNG_ERR_INVALID; | |
259c2674 JD |
5576 | goto end; |
5577 | } | |
5578 | ||
66ea93b1 JG |
5579 | /* |
5580 | * As indicated in struct ltt_session's comments, a value of == 0 means | |
5581 | * this schedule rotation type is not in use. | |
5582 | * | |
5583 | * Reject the command if we were asked to activate a schedule that was | |
5584 | * already active. | |
5585 | */ | |
5586 | if (activate && *parameter_value != 0) { | |
5587 | DBG("Failing ROTATION_SET_SCHEDULE (activate) command as the schedule is already active"); | |
5588 | ret = LTTNG_ERR_ROTATION_SCHEDULE_SET; | |
90936dcf | 5589 | goto end; |
66ea93b1 JG |
5590 | } |
5591 | ||
5592 | /* | |
5593 | * Reject the command if we were asked to deactivate a schedule that was | |
5594 | * not active. | |
5595 | */ | |
5596 | if (!activate && *parameter_value == 0) { | |
5597 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as the schedule is already inactive"); | |
5598 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
90936dcf JD |
5599 | goto end; |
5600 | } | |
5601 | ||
66ea93b1 JG |
5602 | /* |
5603 | * Reject the command if we were asked to deactivate a schedule that | |
5604 | * doesn't exist. | |
5605 | */ | |
5606 | if (!activate && *parameter_value != new_value) { | |
5607 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as an inexistant schedule was provided"); | |
5608 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
5609 | goto end; | |
5610 | } | |
259c2674 | 5611 | |
66ea93b1 JG |
5612 | *parameter_value = activate ? new_value : 0; |
5613 | ||
5614 | switch (schedule_type) { | |
5615 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5616 | if (activate && session->active) { | |
5617 | /* | |
5618 | * Only start the timer if the session is active, | |
5619 | * otherwise it will be started when the session starts. | |
5620 | */ | |
92816cc3 JG |
5621 | ret = timer_session_rotation_schedule_timer_start( |
5622 | session, new_value); | |
259c2674 | 5623 | if (ret) { |
66ea93b1 | 5624 | ERR("Failed to enable session rotation timer in ROTATION_SET_SCHEDULE command"); |
259c2674 JD |
5625 | ret = LTTNG_ERR_UNK; |
5626 | goto end; | |
5627 | } | |
66ea93b1 | 5628 | } else { |
92816cc3 JG |
5629 | ret = timer_session_rotation_schedule_timer_stop( |
5630 | session); | |
66ea93b1 JG |
5631 | if (ret) { |
5632 | ERR("Failed to disable session rotation timer in ROTATION_SET_SCHEDULE command"); | |
5633 | ret = LTTNG_ERR_UNK; | |
f3ce6946 | 5634 | goto end; |
66ea93b1 | 5635 | } |
259c2674 | 5636 | } |
66ea93b1 JG |
5637 | break; |
5638 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5639 | if (activate) { | |
5640 | ret = subscribe_session_consumed_size_rotation(session, | |
5641 | new_value, notification_thread_handle); | |
90936dcf | 5642 | if (ret) { |
66ea93b1 | 5643 | ERR("Failed to enable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5644 | ret = LTTNG_ERR_UNK; |
5645 | goto end; | |
5646 | } | |
90936dcf | 5647 | } else { |
66ea93b1 JG |
5648 | ret = unsubscribe_session_consumed_size_rotation(session, |
5649 | notification_thread_handle); | |
90936dcf | 5650 | if (ret) { |
66ea93b1 | 5651 | ERR("Failed to disable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5652 | ret = LTTNG_ERR_UNK; |
5653 | goto end; | |
5654 | } | |
66ea93b1 | 5655 | |
90936dcf | 5656 | } |
66ea93b1 JG |
5657 | break; |
5658 | default: | |
5659 | /* Would have been caught before. */ | |
5660 | abort(); | |
90936dcf JD |
5661 | } |
5662 | ||
259c2674 JD |
5663 | ret = LTTNG_OK; |
5664 | ||
5665 | goto end; | |
5666 | ||
5667 | end: | |
5668 | return ret; | |
5669 | } | |
5670 | ||
a503e1ef JG |
5671 | /* Wait for a given path to be removed before continuing. */ |
5672 | static enum lttng_error_code wait_on_path(void *path_data) | |
5673 | { | |
5674 | const char *shm_path = path_data; | |
5675 | ||
5676 | DBG("Waiting for the shm path at %s to be removed before completing session destruction", | |
5677 | shm_path); | |
5678 | while (true) { | |
5679 | int ret; | |
5680 | struct stat st; | |
5681 | ||
5682 | ret = stat(shm_path, &st); | |
5683 | if (ret) { | |
5684 | if (errno != ENOENT) { | |
5685 | PERROR("stat() returned an error while checking for the existence of the shm path"); | |
5686 | } else { | |
5687 | DBG("shm path no longer exists, completing the destruction of session"); | |
5688 | } | |
5689 | break; | |
5690 | } else { | |
5691 | if (!S_ISDIR(st.st_mode)) { | |
5692 | ERR("The type of shm path %s returned by stat() is not a directory; aborting the wait for shm path removal", | |
5693 | shm_path); | |
5694 | break; | |
5695 | } | |
5696 | } | |
5697 | usleep(SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US); | |
5698 | } | |
5699 | return LTTNG_OK; | |
5700 | } | |
5701 | ||
5702 | /* | |
5703 | * Returns a pointer to a handler to run on completion of a command. | |
5704 | * Returns NULL if no handler has to be run for the last command executed. | |
5705 | */ | |
5706 | const struct cmd_completion_handler *cmd_pop_completion_handler(void) | |
5707 | { | |
5708 | struct cmd_completion_handler *handler = current_completion_handler; | |
5709 | ||
5710 | current_completion_handler = NULL; | |
5711 | return handler; | |
5712 | } | |
5713 | ||
2f77fc4b DG |
5714 | /* |
5715 | * Init command subsystem. | |
5716 | */ | |
5717 | void cmd_init(void) | |
5718 | { | |
5719 | /* | |
d88aee68 DG |
5720 | * Set network sequence index to 1 for streams to match a relayd |
5721 | * socket on the consumer side. | |
2f77fc4b | 5722 | */ |
d88aee68 DG |
5723 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
5724 | relayd_net_seq_idx = 1; | |
5725 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
5726 | |
5727 | DBG("Command subsystem initialized"); | |
5728 | } |