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> | |
82b69413 | 26 | #include <common/trace-chunk.h> |
3e3665b8 | 27 | #include <lttng/location-internal.h> |
b0880ae5 JG |
28 | #include <lttng/trigger/trigger-internal.h> |
29 | #include <lttng/condition/condition.h> | |
30 | #include <lttng/action/action.h> | |
6e21424e | 31 | #include <lttng/channel.h> |
b0880ae5 | 32 | #include <lttng/channel-internal.h> |
5c408ad8 | 33 | #include <lttng/rotate-internal.h> |
17dd1232 | 34 | #include <lttng/location-internal.h> |
b178f53e | 35 | #include <lttng/session-internal.h> |
3c02e545 | 36 | #include <lttng/userspace-probe-internal.h> |
b178f53e | 37 | #include <lttng/session-descriptor-internal.h> |
9f449915 | 38 | #include <common/string-utils/string-utils.h> |
2f77fc4b DG |
39 | |
40 | #include "channel.h" | |
41 | #include "consumer.h" | |
42 | #include "event.h" | |
8782cc74 | 43 | #include "health-sessiond.h" |
2f77fc4b DG |
44 | #include "kernel.h" |
45 | #include "kernel-consumer.h" | |
46 | #include "lttng-sessiond.h" | |
47 | #include "utils.h" | |
0dbc2034 | 48 | #include "lttng-syscall.h" |
7c1d2758 | 49 | #include "agent.h" |
93ec662e | 50 | #include "buffer-registry.h" |
b0880ae5 JG |
51 | #include "notification-thread.h" |
52 | #include "notification-thread-commands.h" | |
5c408ad8 JD |
53 | #include "rotate.h" |
54 | #include "rotation-thread.h" | |
8e319828 | 55 | #include "timer.h" |
f28f9e44 | 56 | #include "agent-thread.h" |
2f77fc4b DG |
57 | |
58 | #include "cmd.h" | |
59 | ||
a503e1ef JG |
60 | /* Sleep for 100ms between each check for the shm path's deletion. */ |
61 | #define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000 | |
62 | ||
3e3665b8 JG |
63 | struct cmd_destroy_session_reply_context { |
64 | int reply_sock_fd; | |
65 | bool implicit_rotation_on_destroy; | |
3285a971 JG |
66 | /* |
67 | * Indicates whether or not an error occurred while launching the | |
68 | * destruction of a session. | |
69 | */ | |
70 | enum lttng_error_code destruction_status; | |
3e3665b8 JG |
71 | }; |
72 | ||
a503e1ef JG |
73 | static enum lttng_error_code wait_on_path(void *path); |
74 | ||
75 | /* | |
76 | * Command completion handler that is used by the destroy command | |
77 | * when a session that has a non-default shm_path is being destroyed. | |
78 | * | |
79 | * See comment in cmd_destroy_session() for the rationale. | |
80 | */ | |
81 | static struct destroy_completion_handler { | |
82 | struct cmd_completion_handler handler; | |
83 | char shm_path[member_sizeof(struct ltt_session, shm_path)]; | |
84 | } destroy_completion_handler = { | |
85 | .handler = { | |
86 | .run = wait_on_path, | |
87 | .data = destroy_completion_handler.shm_path | |
88 | }, | |
89 | .shm_path = { 0 }, | |
90 | }; | |
91 | ||
92 | static struct cmd_completion_handler *current_completion_handler; | |
93 | ||
2f77fc4b DG |
94 | /* |
95 | * Used to keep a unique index for each relayd socket created where this value | |
96 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
97 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
98 | * held. | |
2f77fc4b | 99 | */ |
d88aee68 DG |
100 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
101 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 102 | |
7076b56e JG |
103 | static int validate_ust_event_name(const char *); |
104 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 105 | const struct lttng_domain *domain, |
7076b56e JG |
106 | char *channel_name, struct lttng_event *event, |
107 | char *filter_expression, | |
108 | struct lttng_filter_bytecode *filter, | |
109 | struct lttng_event_exclusion *exclusion, | |
110 | int wpipe); | |
111 | ||
2f77fc4b DG |
112 | /* |
113 | * Create a session path used by list_lttng_sessions for the case that the | |
114 | * session consumer is on the network. | |
115 | */ | |
116 | static int build_network_session_path(char *dst, size_t size, | |
117 | struct ltt_session *session) | |
118 | { | |
119 | int ret, kdata_port, udata_port; | |
120 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
121 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
122 | ||
123 | assert(session); | |
124 | assert(dst); | |
125 | ||
126 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
127 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
128 | ||
129 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
130 | ||
131 | if (session->kernel_session && session->kernel_session->consumer) { | |
132 | kuri = &session->kernel_session->consumer->dst.net.control; | |
133 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
134 | } | |
135 | ||
136 | if (session->ust_session && session->ust_session->consumer) { | |
137 | uuri = &session->ust_session->consumer->dst.net.control; | |
138 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
139 | } | |
140 | ||
141 | if (uuri == NULL && kuri == NULL) { | |
142 | uri = &session->consumer->dst.net.control; | |
143 | kdata_port = session->consumer->dst.net.data.port; | |
144 | } else if (kuri && uuri) { | |
145 | ret = uri_compare(kuri, uuri); | |
146 | if (ret) { | |
147 | /* Not Equal */ | |
148 | uri = kuri; | |
149 | /* Build uuri URL string */ | |
150 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
151 | if (ret < 0) { | |
152 | goto error; | |
153 | } | |
154 | } else { | |
155 | uri = kuri; | |
156 | } | |
157 | } else if (kuri && uuri == NULL) { | |
158 | uri = kuri; | |
159 | } else if (uuri && kuri == NULL) { | |
160 | uri = uuri; | |
161 | } | |
162 | ||
163 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
164 | if (ret < 0) { | |
165 | goto error; | |
166 | } | |
167 | ||
9aa9f900 DG |
168 | /* |
169 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
170 | * to print. | |
171 | */ | |
9d035200 | 172 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
173 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
174 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
175 | } else { | |
9aa9f900 | 176 | int dport; |
bef08707 | 177 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
178 | dport = kdata_port; |
179 | } else { | |
180 | /* No kernel URI, use the UST port. */ | |
181 | dport = udata_port; | |
182 | } | |
183 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
184 | } |
185 | ||
186 | error: | |
187 | return ret; | |
188 | } | |
189 | ||
fb83fe64 JD |
190 | /* |
191 | * Get run-time attributes if the session has been started (discarded events, | |
192 | * lost packets). | |
193 | */ | |
194 | static int get_kernel_runtime_stats(struct ltt_session *session, | |
195 | struct ltt_kernel_channel *kchan, uint64_t *discarded_events, | |
196 | uint64_t *lost_packets) | |
197 | { | |
198 | int ret; | |
199 | ||
200 | if (!session->has_been_started) { | |
201 | ret = 0; | |
202 | *discarded_events = 0; | |
203 | *lost_packets = 0; | |
204 | goto end; | |
205 | } | |
206 | ||
e1f3997a | 207 | ret = consumer_get_discarded_events(session->id, kchan->key, |
fb83fe64 JD |
208 | session->kernel_session->consumer, |
209 | discarded_events); | |
210 | if (ret < 0) { | |
211 | goto end; | |
212 | } | |
213 | ||
e1f3997a | 214 | ret = consumer_get_lost_packets(session->id, kchan->key, |
fb83fe64 JD |
215 | session->kernel_session->consumer, |
216 | lost_packets); | |
217 | if (ret < 0) { | |
218 | goto end; | |
219 | } | |
220 | ||
221 | end: | |
222 | return ret; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Get run-time attributes if the session has been started (discarded events, | |
227 | * lost packets). | |
228 | */ | |
229 | static int get_ust_runtime_stats(struct ltt_session *session, | |
230 | struct ltt_ust_channel *uchan, uint64_t *discarded_events, | |
231 | uint64_t *lost_packets) | |
232 | { | |
233 | int ret; | |
234 | struct ltt_ust_session *usess; | |
235 | ||
a91c5803 JG |
236 | if (!discarded_events || !lost_packets) { |
237 | ret = -1; | |
238 | goto end; | |
239 | } | |
240 | ||
fb83fe64 | 241 | usess = session->ust_session; |
a905c624 JG |
242 | assert(discarded_events); |
243 | assert(lost_packets); | |
fb83fe64 JD |
244 | |
245 | if (!usess || !session->has_been_started) { | |
246 | *discarded_events = 0; | |
247 | *lost_packets = 0; | |
248 | ret = 0; | |
249 | goto end; | |
250 | } | |
251 | ||
252 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
253 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
254 | &usess->buffer_reg_uid_list, | |
255 | usess->consumer, uchan->id, | |
256 | uchan->attr.overwrite, | |
257 | discarded_events, | |
258 | lost_packets); | |
259 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { | |
260 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
261 | uchan, usess->consumer, | |
262 | uchan->attr.overwrite, | |
263 | discarded_events, | |
264 | lost_packets); | |
265 | if (ret < 0) { | |
266 | goto end; | |
267 | } | |
268 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
269 | *lost_packets += uchan->per_pid_closed_app_lost; | |
270 | } else { | |
271 | ERR("Unsupported buffer type"); | |
967bc289 | 272 | assert(0); |
fb83fe64 JD |
273 | ret = -1; |
274 | goto end; | |
275 | } | |
276 | ||
277 | end: | |
278 | return ret; | |
279 | } | |
280 | ||
2f77fc4b DG |
281 | /* |
282 | * Fill lttng_channel array of all channels. | |
283 | */ | |
d449df4a | 284 | static ssize_t list_lttng_channels(enum lttng_domain_type domain, |
fb83fe64 | 285 | struct ltt_session *session, struct lttng_channel *channels, |
cf0bcb51 | 286 | struct lttng_channel_extended *chan_exts) |
2f77fc4b | 287 | { |
d449df4a | 288 | int i = 0, ret = 0; |
2f77fc4b DG |
289 | struct ltt_kernel_channel *kchan; |
290 | ||
291 | DBG("Listing channels for session %s", session->name); | |
292 | ||
293 | switch (domain) { | |
294 | case LTTNG_DOMAIN_KERNEL: | |
295 | /* Kernel channels */ | |
296 | if (session->kernel_session != NULL) { | |
297 | cds_list_for_each_entry(kchan, | |
298 | &session->kernel_session->channel_list.head, list) { | |
fb83fe64 | 299 | uint64_t discarded_events, lost_packets; |
cf0bcb51 JG |
300 | struct lttng_channel_extended *extended; |
301 | ||
302 | extended = (struct lttng_channel_extended *) | |
303 | kchan->channel->attr.extended.ptr; | |
fb83fe64 JD |
304 | |
305 | ret = get_kernel_runtime_stats(session, kchan, | |
306 | &discarded_events, &lost_packets); | |
307 | if (ret < 0) { | |
308 | goto end; | |
309 | } | |
2f77fc4b DG |
310 | /* Copy lttng_channel struct to array */ |
311 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
312 | channels[i].enabled = kchan->enabled; | |
fb83fe64 JD |
313 | chan_exts[i].discarded_events = |
314 | discarded_events; | |
315 | chan_exts[i].lost_packets = lost_packets; | |
cf0bcb51 JG |
316 | chan_exts[i].monitor_timer_interval = |
317 | extended->monitor_timer_interval; | |
491d1539 | 318 | chan_exts[i].blocking_timeout = 0; |
2f77fc4b DG |
319 | i++; |
320 | } | |
321 | } | |
322 | break; | |
323 | case LTTNG_DOMAIN_UST: | |
324 | { | |
325 | struct lttng_ht_iter iter; | |
326 | struct ltt_ust_channel *uchan; | |
327 | ||
e7fe706f | 328 | rcu_read_lock(); |
2f77fc4b DG |
329 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
330 | &iter.iter, uchan, node.node) { | |
a91c5803 | 331 | uint64_t discarded_events = 0, lost_packets = 0; |
fb83fe64 | 332 | |
8ee609c8 MD |
333 | if (lttng_strncpy(channels[i].name, uchan->name, |
334 | LTTNG_SYMBOL_NAME_LEN)) { | |
335 | break; | |
336 | } | |
2f77fc4b DG |
337 | channels[i].attr.overwrite = uchan->attr.overwrite; |
338 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
339 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
340 | channels[i].attr.switch_timer_interval = | |
341 | uchan->attr.switch_timer_interval; | |
342 | channels[i].attr.read_timer_interval = | |
343 | uchan->attr.read_timer_interval; | |
344 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
345 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
346 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
5e4435a4 JG |
347 | |
348 | /* | |
349 | * Map enum lttng_ust_output to enum lttng_event_output. | |
350 | */ | |
2f77fc4b DG |
351 | switch (uchan->attr.output) { |
352 | case LTTNG_UST_MMAP: | |
2f77fc4b DG |
353 | channels[i].attr.output = LTTNG_EVENT_MMAP; |
354 | break; | |
5e4435a4 JG |
355 | default: |
356 | /* | |
357 | * LTTNG_UST_MMAP is the only supported UST | |
358 | * output mode. | |
359 | */ | |
360 | assert(0); | |
361 | break; | |
2f77fc4b | 362 | } |
fb83fe64 | 363 | |
d449df4a MD |
364 | chan_exts[i].monitor_timer_interval = |
365 | uchan->monitor_timer_interval; | |
491d1539 MD |
366 | chan_exts[i].blocking_timeout = |
367 | uchan->attr.u.s.blocking_timeout; | |
d449df4a | 368 | |
fb83fe64 JD |
369 | ret = get_ust_runtime_stats(session, uchan, |
370 | &discarded_events, &lost_packets); | |
371 | if (ret < 0) { | |
372 | break; | |
373 | } | |
374 | chan_exts[i].discarded_events = discarded_events; | |
375 | chan_exts[i].lost_packets = lost_packets; | |
2f77fc4b DG |
376 | i++; |
377 | } | |
e7fe706f | 378 | rcu_read_unlock(); |
2f77fc4b DG |
379 | break; |
380 | } | |
381 | default: | |
382 | break; | |
383 | } | |
fb83fe64 JD |
384 | |
385 | end: | |
d449df4a MD |
386 | if (ret < 0) { |
387 | return -LTTNG_ERR_FATAL; | |
388 | } else { | |
389 | return LTTNG_OK; | |
390 | } | |
2f77fc4b DG |
391 | } |
392 | ||
3c02e545 FD |
393 | static int increment_extended_len(const char *filter_expression, |
394 | struct lttng_event_exclusion *exclusion, | |
395 | const struct lttng_userspace_probe_location *probe_location, | |
396 | size_t *extended_len) | |
b4e3ceb9 | 397 | { |
3c02e545 FD |
398 | int ret = 0; |
399 | ||
b4e3ceb9 PP |
400 | *extended_len += sizeof(struct lttcomm_event_extended_header); |
401 | ||
402 | if (filter_expression) { | |
403 | *extended_len += strlen(filter_expression) + 1; | |
404 | } | |
795d57ce PP |
405 | |
406 | if (exclusion) { | |
407 | *extended_len += exclusion->count * LTTNG_SYMBOL_NAME_LEN; | |
408 | } | |
3c02e545 FD |
409 | |
410 | if (probe_location) { | |
411 | ret = lttng_userspace_probe_location_serialize(probe_location, | |
412 | NULL, NULL); | |
413 | if (ret < 0) { | |
414 | goto end; | |
415 | } | |
416 | *extended_len += ret; | |
417 | } | |
418 | ret = 0; | |
419 | end: | |
420 | return ret; | |
b4e3ceb9 PP |
421 | } |
422 | ||
3c02e545 FD |
423 | static int append_extended_info(const char *filter_expression, |
424 | struct lttng_event_exclusion *exclusion, | |
425 | struct lttng_userspace_probe_location *probe_location, | |
426 | void **extended_at) | |
b4e3ceb9 | 427 | { |
3c02e545 | 428 | int ret = 0; |
b4e3ceb9 | 429 | size_t filter_len = 0; |
795d57ce | 430 | size_t nb_exclusions = 0; |
3c02e545 FD |
431 | size_t userspace_probe_location_len = 0; |
432 | struct lttng_dynamic_buffer location_buffer; | |
433 | struct lttcomm_event_extended_header extended_header; | |
b4e3ceb9 PP |
434 | |
435 | if (filter_expression) { | |
436 | filter_len = strlen(filter_expression) + 1; | |
437 | } | |
438 | ||
795d57ce PP |
439 | if (exclusion) { |
440 | nb_exclusions = exclusion->count; | |
441 | } | |
442 | ||
3c02e545 FD |
443 | if (probe_location) { |
444 | lttng_dynamic_buffer_init(&location_buffer); | |
445 | ret = lttng_userspace_probe_location_serialize(probe_location, | |
446 | &location_buffer, NULL); | |
447 | if (ret < 0) { | |
448 | ret = -1; | |
449 | goto end; | |
450 | } | |
451 | userspace_probe_location_len = location_buffer.size; | |
452 | } | |
453 | ||
795d57ce | 454 | /* Set header fields */ |
b4e3ceb9 | 455 | extended_header.filter_len = filter_len; |
795d57ce | 456 | extended_header.nb_exclusions = nb_exclusions; |
3c02e545 | 457 | extended_header.userspace_probe_location_len = userspace_probe_location_len; |
795d57ce PP |
458 | |
459 | /* Copy header */ | |
b4e3ceb9 PP |
460 | memcpy(*extended_at, &extended_header, sizeof(extended_header)); |
461 | *extended_at += sizeof(extended_header); | |
795d57ce PP |
462 | |
463 | /* Copy filter string */ | |
464 | if (filter_expression) { | |
465 | memcpy(*extended_at, filter_expression, filter_len); | |
466 | *extended_at += filter_len; | |
467 | } | |
468 | ||
469 | /* Copy exclusion names */ | |
470 | if (exclusion) { | |
471 | size_t len = nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
472 | ||
473 | memcpy(*extended_at, &exclusion->names, len); | |
474 | *extended_at += len; | |
475 | } | |
3c02e545 FD |
476 | |
477 | if (probe_location) { | |
478 | memcpy(*extended_at, location_buffer.data, location_buffer.size); | |
479 | *extended_at += location_buffer.size; | |
480 | lttng_dynamic_buffer_reset(&location_buffer); | |
481 | } | |
482 | ret = 0; | |
483 | end: | |
484 | return ret; | |
b4e3ceb9 PP |
485 | } |
486 | ||
3c6a091f | 487 | /* |
022d91ba | 488 | * Create a list of agent domain events. |
3c6a091f DG |
489 | * |
490 | * Return number of events in list on success or else a negative value. | |
491 | */ | |
022d91ba | 492 | static int list_lttng_agent_events(struct agent *agt, |
b4e3ceb9 | 493 | struct lttng_event **events, size_t *total_size) |
3c6a091f DG |
494 | { |
495 | int i = 0, ret = 0; | |
496 | unsigned int nb_event = 0; | |
022d91ba | 497 | struct agent_event *event; |
47e52862 | 498 | struct lttng_event *tmp_events = NULL; |
3c6a091f | 499 | struct lttng_ht_iter iter; |
b4e3ceb9 PP |
500 | size_t extended_len = 0; |
501 | void *extended_at; | |
3c6a091f | 502 | |
022d91ba | 503 | assert(agt); |
3c6a091f DG |
504 | assert(events); |
505 | ||
022d91ba | 506 | DBG3("Listing agent events"); |
3c6a091f | 507 | |
e5bbf678 | 508 | rcu_read_lock(); |
022d91ba | 509 | nb_event = lttng_ht_get_count(agt->events); |
e5bbf678 | 510 | rcu_read_unlock(); |
3c6a091f DG |
511 | if (nb_event == 0) { |
512 | ret = nb_event; | |
b4e3ceb9 | 513 | *total_size = 0; |
3c6a091f DG |
514 | goto error; |
515 | } | |
516 | ||
b4e3ceb9 PP |
517 | /* Compute required extended infos size */ |
518 | extended_len = nb_event * sizeof(struct lttcomm_event_extended_header); | |
519 | ||
520 | /* | |
521 | * This is only valid because the commands which add events are | |
522 | * processed in the same thread as the listing. | |
523 | */ | |
524 | rcu_read_lock(); | |
525 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { | |
3c02e545 | 526 | ret = increment_extended_len(event->filter_expression, NULL, NULL, |
795d57ce | 527 | &extended_len); |
3c02e545 FD |
528 | if (ret) { |
529 | DBG("Error computing the length of extended info message"); | |
530 | ret = -LTTNG_ERR_FATAL; | |
531 | goto error; | |
532 | } | |
b4e3ceb9 PP |
533 | } |
534 | rcu_read_unlock(); | |
535 | ||
536 | *total_size = nb_event * sizeof(*tmp_events) + extended_len; | |
537 | tmp_events = zmalloc(*total_size); | |
3c6a091f | 538 | if (!tmp_events) { |
022d91ba | 539 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
540 | ret = -LTTNG_ERR_FATAL; |
541 | goto error; | |
542 | } | |
543 | ||
b4e3ceb9 PP |
544 | extended_at = ((uint8_t *) tmp_events) + |
545 | nb_event * sizeof(struct lttng_event); | |
546 | ||
3c6a091f | 547 | rcu_read_lock(); |
022d91ba | 548 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
549 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
550 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
551 | tmp_events[i].enabled = event->enabled; | |
2106efa0 | 552 | tmp_events[i].loglevel = event->loglevel_value; |
ff94328f | 553 | tmp_events[i].loglevel_type = event->loglevel_type; |
3c6a091f | 554 | i++; |
b4e3ceb9 PP |
555 | |
556 | /* Append extended info */ | |
3c02e545 | 557 | ret = append_extended_info(event->filter_expression, NULL, NULL, |
795d57ce | 558 | &extended_at); |
3c02e545 FD |
559 | if (ret) { |
560 | DBG("Error appending extended info message"); | |
561 | ret = -LTTNG_ERR_FATAL; | |
562 | goto error; | |
563 | } | |
3c6a091f | 564 | } |
3c6a091f DG |
565 | |
566 | *events = tmp_events; | |
567 | ret = nb_event; | |
3c02e545 | 568 | assert(nb_event == i); |
3c6a091f | 569 | |
47e52862 | 570 | end: |
3c02e545 | 571 | rcu_read_unlock(); |
3c6a091f | 572 | return ret; |
47e52862 JG |
573 | error: |
574 | free(tmp_events); | |
575 | goto end; | |
3c6a091f DG |
576 | } |
577 | ||
2f77fc4b DG |
578 | /* |
579 | * Create a list of ust global domain events. | |
580 | */ | |
581 | static int list_lttng_ust_global_events(char *channel_name, | |
b4e3ceb9 PP |
582 | struct ltt_ust_domain_global *ust_global, |
583 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
584 | { |
585 | int i = 0, ret = 0; | |
586 | unsigned int nb_event = 0; | |
587 | struct lttng_ht_iter iter; | |
588 | struct lttng_ht_node_str *node; | |
589 | struct ltt_ust_channel *uchan; | |
590 | struct ltt_ust_event *uevent; | |
591 | struct lttng_event *tmp; | |
b4e3ceb9 PP |
592 | size_t extended_len = 0; |
593 | void *extended_at; | |
2f77fc4b DG |
594 | |
595 | DBG("Listing UST global events for channel %s", channel_name); | |
596 | ||
597 | rcu_read_lock(); | |
598 | ||
599 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
600 | node = lttng_ht_iter_get_node_str(&iter); | |
601 | if (node == NULL) { | |
f73fabfd | 602 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
d31d3e8c | 603 | goto end; |
2f77fc4b DG |
604 | } |
605 | ||
606 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
607 | ||
3c442be3 | 608 | nb_event = lttng_ht_get_count(uchan->events); |
2f77fc4b DG |
609 | if (nb_event == 0) { |
610 | ret = nb_event; | |
b4e3ceb9 | 611 | *total_size = 0; |
d31d3e8c | 612 | goto end; |
2f77fc4b DG |
613 | } |
614 | ||
615 | DBG3("Listing UST global %d events", nb_event); | |
616 | ||
b4e3ceb9 PP |
617 | /* Compute required extended infos size */ |
618 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
619 | if (uevent->internal) { | |
620 | nb_event--; | |
621 | continue; | |
622 | } | |
623 | ||
3c02e545 FD |
624 | ret = increment_extended_len(uevent->filter_expression, |
625 | uevent->exclusion, NULL, &extended_len); | |
626 | if (ret) { | |
627 | DBG("Error computing the length of extended info message"); | |
628 | ret = -LTTNG_ERR_FATAL; | |
629 | goto end; | |
630 | } | |
b4e3ceb9 | 631 | } |
d31d3e8c PP |
632 | if (nb_event == 0) { |
633 | /* All events are internal, skip. */ | |
634 | ret = 0; | |
635 | *total_size = 0; | |
636 | goto end; | |
637 | } | |
b4e3ceb9 PP |
638 | |
639 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
640 | tmp = zmalloc(*total_size); | |
2f77fc4b | 641 | if (tmp == NULL) { |
b12c38df JG |
642 | ret = -LTTNG_ERR_FATAL; |
643 | goto end; | |
2f77fc4b DG |
644 | } |
645 | ||
b4e3ceb9 PP |
646 | extended_at = ((uint8_t *) tmp) + nb_event * sizeof(struct lttng_event); |
647 | ||
2f77fc4b | 648 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
3c442be3 JG |
649 | if (uevent->internal) { |
650 | /* This event should remain hidden from clients */ | |
3c442be3 JG |
651 | continue; |
652 | } | |
2f77fc4b DG |
653 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
654 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
655 | tmp[i].enabled = uevent->enabled; | |
656 | ||
657 | switch (uevent->attr.instrumentation) { | |
658 | case LTTNG_UST_TRACEPOINT: | |
659 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
660 | break; | |
661 | case LTTNG_UST_PROBE: | |
662 | tmp[i].type = LTTNG_EVENT_PROBE; | |
663 | break; | |
664 | case LTTNG_UST_FUNCTION: | |
665 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
666 | break; | |
667 | } | |
668 | ||
669 | tmp[i].loglevel = uevent->attr.loglevel; | |
670 | switch (uevent->attr.loglevel_type) { | |
671 | case LTTNG_UST_LOGLEVEL_ALL: | |
672 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
673 | break; | |
674 | case LTTNG_UST_LOGLEVEL_RANGE: | |
675 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
676 | break; | |
677 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
678 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
679 | break; | |
680 | } | |
681 | if (uevent->filter) { | |
682 | tmp[i].filter = 1; | |
683 | } | |
4634f12e JI |
684 | if (uevent->exclusion) { |
685 | tmp[i].exclusion = 1; | |
686 | } | |
2f77fc4b | 687 | i++; |
b4e3ceb9 PP |
688 | |
689 | /* Append extended info */ | |
3c02e545 FD |
690 | ret = append_extended_info(uevent->filter_expression, |
691 | uevent->exclusion, NULL, &extended_at); | |
692 | if (ret) { | |
693 | DBG("Error appending extended info message"); | |
694 | ret = -LTTNG_ERR_FATAL; | |
695 | goto end; | |
696 | } | |
2f77fc4b DG |
697 | } |
698 | ||
699 | ret = nb_event; | |
700 | *events = tmp; | |
d31d3e8c | 701 | end: |
2f77fc4b DG |
702 | rcu_read_unlock(); |
703 | return ret; | |
704 | } | |
705 | ||
706 | /* | |
707 | * Fill lttng_event array of all kernel events in the channel. | |
708 | */ | |
709 | static int list_lttng_kernel_events(char *channel_name, | |
b4e3ceb9 PP |
710 | struct ltt_kernel_session *kernel_session, |
711 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
712 | { |
713 | int i = 0, ret; | |
714 | unsigned int nb_event; | |
715 | struct ltt_kernel_event *event; | |
716 | struct ltt_kernel_channel *kchan; | |
b4e3ceb9 PP |
717 | size_t extended_len = 0; |
718 | void *extended_at; | |
2f77fc4b DG |
719 | |
720 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
721 | if (kchan == NULL) { | |
f73fabfd | 722 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
723 | goto error; |
724 | } | |
725 | ||
726 | nb_event = kchan->event_count; | |
727 | ||
728 | DBG("Listing events for channel %s", kchan->channel->name); | |
729 | ||
730 | if (nb_event == 0) { | |
b4e3ceb9 | 731 | *total_size = 0; |
834978fd | 732 | *events = NULL; |
db906c12 | 733 | goto end; |
2f77fc4b DG |
734 | } |
735 | ||
b4e3ceb9 PP |
736 | /* Compute required extended infos size */ |
737 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { | |
3c02e545 FD |
738 | ret = increment_extended_len(event->filter_expression, NULL, |
739 | event->userspace_probe_location, | |
795d57ce | 740 | &extended_len); |
3c02e545 FD |
741 | if (ret) { |
742 | DBG("Error computing the length of extended info message"); | |
743 | ret = -LTTNG_ERR_FATAL; | |
744 | goto error; | |
745 | } | |
b4e3ceb9 PP |
746 | } |
747 | ||
748 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
749 | *events = zmalloc(*total_size); | |
2f77fc4b | 750 | if (*events == NULL) { |
3c02e545 | 751 | ret = -LTTNG_ERR_FATAL; |
2f77fc4b DG |
752 | goto error; |
753 | } | |
754 | ||
ab4aa612 | 755 | extended_at = ((void *) *events) + |
b4e3ceb9 PP |
756 | nb_event * sizeof(struct lttng_event); |
757 | ||
2f77fc4b DG |
758 | /* Kernel channels */ |
759 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
760 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
761 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
762 | (*events)[i].enabled = event->enabled; | |
00f992f2 JG |
763 | (*events)[i].filter = |
764 | (unsigned char) !!event->filter_expression; | |
2f77fc4b DG |
765 | |
766 | switch (event->event->instrumentation) { | |
767 | case LTTNG_KERNEL_TRACEPOINT: | |
768 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
769 | break; | |
2f77fc4b | 770 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
771 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
772 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
773 | sizeof(struct lttng_kernel_kprobe)); | |
774 | break; | |
775 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
776 | (*events)[i].type = LTTNG_EVENT_PROBE; |
777 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
778 | sizeof(struct lttng_kernel_kprobe)); | |
779 | break; | |
b955b4d4 FD |
780 | case LTTNG_KERNEL_UPROBE: |
781 | (*events)[i].type = LTTNG_EVENT_USERSPACE_PROBE; | |
782 | break; | |
2f77fc4b DG |
783 | case LTTNG_KERNEL_FUNCTION: |
784 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
785 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
786 | sizeof(struct lttng_kernel_function)); | |
787 | break; | |
788 | case LTTNG_KERNEL_NOOP: | |
789 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
790 | break; | |
791 | case LTTNG_KERNEL_SYSCALL: | |
792 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
793 | break; | |
794 | case LTTNG_KERNEL_ALL: | |
1ab8c2ad FD |
795 | /* fall-through. */ |
796 | default: | |
2f77fc4b DG |
797 | assert(0); |
798 | break; | |
799 | } | |
800 | i++; | |
b4e3ceb9 PP |
801 | |
802 | /* Append extended info */ | |
3c02e545 FD |
803 | ret = append_extended_info(event->filter_expression, NULL, |
804 | event->userspace_probe_location, &extended_at); | |
805 | if (ret) { | |
806 | DBG("Error appending extended info message"); | |
807 | ret = -LTTNG_ERR_FATAL; | |
808 | goto error; | |
809 | } | |
2f77fc4b DG |
810 | } |
811 | ||
db906c12 | 812 | end: |
2f77fc4b DG |
813 | return nb_event; |
814 | ||
815 | error: | |
f73fabfd DG |
816 | /* Negate the error code to differentiate the size from an error */ |
817 | return -ret; | |
2f77fc4b DG |
818 | } |
819 | ||
820 | /* | |
821 | * Add URI so the consumer output object. Set the correct path depending on the | |
822 | * domain adding the default trace directory. | |
823 | */ | |
b178f53e JG |
824 | static enum lttng_error_code add_uri_to_consumer( |
825 | const struct ltt_session *session, | |
826 | struct consumer_output *consumer, | |
827 | struct lttng_uri *uri, enum lttng_domain_type domain) | |
2f77fc4b | 828 | { |
b178f53e JG |
829 | int ret; |
830 | enum lttng_error_code ret_code = LTTNG_OK; | |
2f77fc4b DG |
831 | |
832 | assert(uri); | |
833 | ||
834 | if (consumer == NULL) { | |
835 | DBG("No consumer detected. Don't add URI. Stopping."); | |
b178f53e | 836 | ret_code = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
837 | goto error; |
838 | } | |
839 | ||
840 | switch (domain) { | |
841 | case LTTNG_DOMAIN_KERNEL: | |
b178f53e JG |
842 | ret = lttng_strncpy(consumer->domain_subdir, |
843 | DEFAULT_KERNEL_TRACE_DIR, | |
844 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
845 | break; |
846 | case LTTNG_DOMAIN_UST: | |
b178f53e JG |
847 | ret = lttng_strncpy(consumer->domain_subdir, |
848 | DEFAULT_UST_TRACE_DIR, | |
849 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
850 | break; |
851 | default: | |
852 | /* | |
b178f53e JG |
853 | * This case is possible is we try to add the URI to the global |
854 | * tracing session consumer object which in this case there is | |
855 | * no subdir. | |
2f77fc4b | 856 | */ |
b178f53e JG |
857 | memset(consumer->domain_subdir, 0, |
858 | sizeof(consumer->domain_subdir)); | |
859 | ret = 0; | |
860 | } | |
861 | if (ret) { | |
862 | ERR("Failed to initialize consumer output domain subdirectory"); | |
863 | ret_code = LTTNG_ERR_FATAL; | |
864 | goto error; | |
2f77fc4b DG |
865 | } |
866 | ||
867 | switch (uri->dtype) { | |
868 | case LTTNG_DST_IPV4: | |
869 | case LTTNG_DST_IPV6: | |
870 | DBG2("Setting network URI to consumer"); | |
871 | ||
df75acac DG |
872 | if (consumer->type == CONSUMER_DST_NET) { |
873 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
874 | consumer->dst.net.control_isset) || |
875 | (uri->stype == LTTNG_STREAM_DATA && | |
876 | consumer->dst.net.data_isset)) { | |
b178f53e | 877 | ret_code = LTTNG_ERR_URL_EXIST; |
df75acac DG |
878 | goto error; |
879 | } | |
880 | } else { | |
b178f53e | 881 | memset(&consumer->dst, 0, sizeof(consumer->dst)); |
785d2d0d DG |
882 | } |
883 | ||
2f77fc4b | 884 | /* Set URI into consumer output object */ |
b178f53e | 885 | ret = consumer_set_network_uri(session, consumer, uri); |
2f77fc4b | 886 | if (ret < 0) { |
b178f53e | 887 | ret_code = -ret; |
2f77fc4b DG |
888 | goto error; |
889 | } else if (ret == 1) { | |
890 | /* | |
891 | * URI was the same in the consumer so we do not append the subdir | |
892 | * again so to not duplicate output dir. | |
893 | */ | |
b178f53e | 894 | ret_code = LTTNG_OK; |
2f77fc4b DG |
895 | goto error; |
896 | } | |
2f77fc4b DG |
897 | break; |
898 | case LTTNG_DST_PATH: | |
b178f53e JG |
899 | if (*uri->dst.path != '/' || strstr(uri->dst.path, "../")) { |
900 | ret_code = LTTNG_ERR_INVALID; | |
9ac05d92 MD |
901 | goto error; |
902 | } | |
b178f53e JG |
903 | DBG2("Setting trace directory path from URI to %s", |
904 | uri->dst.path); | |
905 | memset(&consumer->dst, 0, sizeof(consumer->dst)); | |
906 | ||
907 | ret = lttng_strncpy(consumer->dst.session_root_path, | |
908 | uri->dst.path, | |
909 | sizeof(consumer->dst.session_root_path)); | |
4df41cad JG |
910 | if (ret) { |
911 | ret_code = LTTNG_ERR_FATAL; | |
912 | goto error; | |
913 | } | |
2f77fc4b DG |
914 | consumer->type = CONSUMER_DST_LOCAL; |
915 | break; | |
916 | } | |
917 | ||
b178f53e | 918 | ret_code = LTTNG_OK; |
2f77fc4b | 919 | error: |
b178f53e | 920 | return ret_code; |
2f77fc4b DG |
921 | } |
922 | ||
923 | /* | |
924 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
925 | */ | |
926 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
927 | { | |
928 | int ret = 0; | |
929 | struct lttng_ht_iter iter; | |
930 | struct consumer_socket *socket; | |
931 | ||
932 | assert(session); | |
933 | ||
e7fe706f DG |
934 | rcu_read_lock(); |
935 | ||
2f77fc4b DG |
936 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
937 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
938 | socket, node.node) { | |
2f77fc4b | 939 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 940 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
941 | pthread_mutex_unlock(socket->lock); |
942 | if (ret < 0) { | |
f73fabfd | 943 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
944 | goto error; |
945 | } | |
946 | } | |
947 | } | |
948 | ||
949 | error: | |
e7fe706f | 950 | rcu_read_unlock(); |
2f77fc4b DG |
951 | return ret; |
952 | } | |
953 | ||
954 | /* | |
955 | * Create a socket to the relayd using the URI. | |
956 | * | |
957 | * On success, the relayd_sock pointer is set to the created socket. | |
9a654598 | 958 | * Else, it remains untouched and an LTTng error code is returned. |
2f77fc4b | 959 | */ |
9a654598 | 960 | static enum lttng_error_code create_connect_relayd(struct lttng_uri *uri, |
b31610f2 JD |
961 | struct lttcomm_relayd_sock **relayd_sock, |
962 | struct consumer_output *consumer) | |
2f77fc4b DG |
963 | { |
964 | int ret; | |
9a654598 | 965 | enum lttng_error_code status = LTTNG_OK; |
6151a90f | 966 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 967 | |
6151a90f JD |
968 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
969 | RELAYD_VERSION_COMM_MINOR); | |
970 | if (!rsock) { | |
9a654598 | 971 | status = LTTNG_ERR_FATAL; |
2f77fc4b DG |
972 | goto error; |
973 | } | |
974 | ||
ffe60014 DG |
975 | /* |
976 | * Connect to relayd so we can proceed with a session creation. This call | |
977 | * can possibly block for an arbitrary amount of time to set the health | |
978 | * state to be in poll execution. | |
979 | */ | |
980 | health_poll_entry(); | |
6151a90f | 981 | ret = relayd_connect(rsock); |
ffe60014 | 982 | health_poll_exit(); |
2f77fc4b DG |
983 | if (ret < 0) { |
984 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 985 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
986 | goto free_sock; |
987 | } | |
988 | ||
989 | /* Create socket for control stream. */ | |
990 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
eacb7b6f MD |
991 | uint64_t result_flags; |
992 | ||
2f77fc4b DG |
993 | DBG3("Creating relayd stream socket from URI"); |
994 | ||
995 | /* Check relayd version */ | |
6151a90f | 996 | ret = relayd_version_check(rsock); |
67d5aa28 | 997 | if (ret == LTTNG_ERR_RELAYD_VERSION_FAIL) { |
9a654598 | 998 | status = LTTNG_ERR_RELAYD_VERSION_FAIL; |
67d5aa28 JD |
999 | goto close_sock; |
1000 | } else if (ret < 0) { | |
1001 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 1002 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
1003 | goto close_sock; |
1004 | } | |
b31610f2 JD |
1005 | consumer->relay_major_version = rsock->major; |
1006 | consumer->relay_minor_version = rsock->minor; | |
eacb7b6f MD |
1007 | ret = relayd_get_configuration(rsock, 0, |
1008 | &result_flags); | |
1009 | if (ret < 0) { | |
1010 | ERR("Unable to get relayd configuration"); | |
1011 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; | |
1012 | goto close_sock; | |
1013 | } | |
1014 | if (result_flags & LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED) { | |
1015 | consumer->relay_allows_clear = true; | |
1016 | } | |
2f77fc4b DG |
1017 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
1018 | DBG3("Creating relayd data socket from URI"); | |
1019 | } else { | |
1020 | /* Command is not valid */ | |
1021 | ERR("Relayd invalid stream type: %d", uri->stype); | |
9a654598 | 1022 | status = LTTNG_ERR_INVALID; |
2f77fc4b DG |
1023 | goto close_sock; |
1024 | } | |
1025 | ||
6151a90f | 1026 | *relayd_sock = rsock; |
2f77fc4b | 1027 | |
9a654598 | 1028 | return status; |
2f77fc4b DG |
1029 | |
1030 | close_sock: | |
6151a90f JD |
1031 | /* The returned value is not useful since we are on an error path. */ |
1032 | (void) relayd_close(rsock); | |
2f77fc4b | 1033 | free_sock: |
6151a90f | 1034 | free(rsock); |
2f77fc4b | 1035 | error: |
9a654598 | 1036 | return status; |
2f77fc4b DG |
1037 | } |
1038 | ||
1039 | /* | |
1040 | * Connect to the relayd using URI and send the socket to the right consumer. | |
43fade62 JG |
1041 | * |
1042 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1043 | * |
1044 | * Returns LTTNG_OK on success or an LTTng error code on failure. | |
2f77fc4b | 1045 | */ |
9a654598 JG |
1046 | static enum lttng_error_code send_consumer_relayd_socket( |
1047 | unsigned int session_id, | |
3044f922 | 1048 | struct lttng_uri *relayd_uri, |
56a37563 | 1049 | struct consumer_output *consumer, |
d3e2ba59 | 1050 | struct consumer_socket *consumer_sock, |
fb9a95c4 | 1051 | const char *session_name, const char *hostname, |
6fa5fe7c | 1052 | const char *base_path, int session_live_timer, |
db1da059 | 1053 | const uint64_t *current_chunk_id, |
46ef2188 MD |
1054 | time_t session_creation_time, |
1055 | bool session_name_contains_creation_time) | |
2f77fc4b DG |
1056 | { |
1057 | int ret; | |
6151a90f | 1058 | struct lttcomm_relayd_sock *rsock = NULL; |
9a654598 | 1059 | enum lttng_error_code status; |
2f77fc4b | 1060 | |
ffe60014 | 1061 | /* Connect to relayd and make version check if uri is the control. */ |
9a654598 JG |
1062 | status = create_connect_relayd(relayd_uri, &rsock, consumer); |
1063 | if (status != LTTNG_OK) { | |
9e218353 | 1064 | goto relayd_comm_error; |
ffe60014 | 1065 | } |
6151a90f | 1066 | assert(rsock); |
ffe60014 | 1067 | |
2f77fc4b | 1068 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
1069 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
1070 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
1071 | /* |
1072 | * Increment net_seq_idx because we are about to transfer the | |
1073 | * new relayd socket to the consumer. | |
d88aee68 | 1074 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 1075 | */ |
d88aee68 DG |
1076 | consumer->net_seq_index = ++relayd_net_seq_idx; |
1077 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
1078 | } |
1079 | ||
2f77fc4b | 1080 | /* Send relayd socket to consumer. */ |
6151a90f | 1081 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 | 1082 | relayd_uri->stype, session_id, |
6fa5fe7c MD |
1083 | session_name, hostname, base_path, |
1084 | session_live_timer, current_chunk_id, | |
46ef2188 | 1085 | session_creation_time, session_name_contains_creation_time); |
2f77fc4b | 1086 | if (ret < 0) { |
9a654598 | 1087 | status = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
1088 | goto close_sock; |
1089 | } | |
1090 | ||
c890b720 DG |
1091 | /* Flag that the corresponding socket was sent. */ |
1092 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 1093 | consumer_sock->control_sock_sent = 1; |
c890b720 | 1094 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 1095 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
1096 | } |
1097 | ||
2f77fc4b DG |
1098 | /* |
1099 | * Close socket which was dup on the consumer side. The session daemon does | |
1100 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
1101 | */ | |
1102 | ||
1103 | close_sock: | |
9a654598 | 1104 | if (status != LTTNG_OK) { |
ffe60014 | 1105 | /* |
d9078d0c DG |
1106 | * The consumer output for this session should not be used anymore |
1107 | * since the relayd connection failed thus making any tracing or/and | |
1108 | * streaming not usable. | |
ffe60014 | 1109 | */ |
d9078d0c | 1110 | consumer->enabled = 0; |
ffe60014 | 1111 | } |
9e218353 JR |
1112 | (void) relayd_close(rsock); |
1113 | free(rsock); | |
1114 | ||
1115 | relayd_comm_error: | |
9a654598 | 1116 | return status; |
2f77fc4b DG |
1117 | } |
1118 | ||
1119 | /* | |
1120 | * Send both relayd sockets to a specific consumer and domain. This is a | |
1121 | * helper function to facilitate sending the information to the consumer for a | |
1122 | * session. | |
43fade62 JG |
1123 | * |
1124 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1125 | * |
1126 | * Returns LTTNG_OK, or an LTTng error code on failure. | |
2f77fc4b | 1127 | */ |
9a654598 JG |
1128 | static enum lttng_error_code send_consumer_relayd_sockets( |
1129 | enum lttng_domain_type domain, | |
56a37563 | 1130 | unsigned int session_id, struct consumer_output *consumer, |
fb9a95c4 | 1131 | struct consumer_socket *sock, const char *session_name, |
6fa5fe7c | 1132 | const char *hostname, const char *base_path, int session_live_timer, |
46ef2188 MD |
1133 | const uint64_t *current_chunk_id, time_t session_creation_time, |
1134 | bool session_name_contains_creation_time) | |
2f77fc4b | 1135 | { |
9a654598 | 1136 | enum lttng_error_code status = LTTNG_OK; |
2f77fc4b | 1137 | |
2f77fc4b | 1138 | assert(consumer); |
6dc3064a | 1139 | assert(sock); |
2f77fc4b | 1140 | |
2f77fc4b | 1141 | /* Sending control relayd socket. */ |
ffe60014 | 1142 | if (!sock->control_sock_sent) { |
9a654598 | 1143 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1144 | &consumer->dst.net.control, consumer, sock, |
6fa5fe7c | 1145 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1146 | current_chunk_id, session_creation_time, |
1147 | session_name_contains_creation_time); | |
9a654598 | 1148 | if (status != LTTNG_OK) { |
c890b720 DG |
1149 | goto error; |
1150 | } | |
2f77fc4b DG |
1151 | } |
1152 | ||
1153 | /* Sending data relayd socket. */ | |
ffe60014 | 1154 | if (!sock->data_sock_sent) { |
9a654598 | 1155 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1156 | &consumer->dst.net.data, consumer, sock, |
6fa5fe7c | 1157 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1158 | current_chunk_id, session_creation_time, |
1159 | session_name_contains_creation_time); | |
9a654598 | 1160 | if (status != LTTNG_OK) { |
c890b720 DG |
1161 | goto error; |
1162 | } | |
2f77fc4b DG |
1163 | } |
1164 | ||
2f77fc4b | 1165 | error: |
9a654598 | 1166 | return status; |
2f77fc4b DG |
1167 | } |
1168 | ||
1169 | /* | |
1170 | * Setup relayd connections for a tracing session. First creates the socket to | |
1171 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
1172 | * network. | |
1173 | */ | |
ffe60014 | 1174 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 1175 | { |
f73fabfd | 1176 | int ret = LTTNG_OK; |
2f77fc4b DG |
1177 | struct ltt_ust_session *usess; |
1178 | struct ltt_kernel_session *ksess; | |
1179 | struct consumer_socket *socket; | |
1180 | struct lttng_ht_iter iter; | |
1e791a74 | 1181 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
2f77fc4b | 1182 | |
1e791a74 | 1183 | assert(session); |
2f77fc4b DG |
1184 | |
1185 | usess = session->ust_session; | |
1186 | ksess = session->kernel_session; | |
1187 | ||
785d2d0d | 1188 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1189 | |
aa997ea3 | 1190 | rcu_read_lock(); |
1e791a74 JG |
1191 | if (session->current_trace_chunk) { |
1192 | enum lttng_trace_chunk_status status = lttng_trace_chunk_get_id( | |
1193 | session->current_trace_chunk, ¤t_chunk_id.value); | |
1194 | ||
1195 | if (status == LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1196 | current_chunk_id.is_set = true; | |
1197 | } else { | |
1198 | ERR("Failed to get current trace chunk id"); | |
1199 | ret = LTTNG_ERR_UNK; | |
1200 | goto error; | |
1201 | } | |
1202 | } | |
1203 | ||
2f77fc4b DG |
1204 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
1205 | && usess->consumer->enabled) { | |
1206 | /* For each consumer socket, send relayd sockets */ | |
1207 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
1208 | socket, node.node) { | |
2f77fc4b | 1209 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1210 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
1211 | usess->consumer, socket, |
1212 | session->name, session->hostname, | |
6fa5fe7c | 1213 | session->base_path, |
1e791a74 | 1214 | session->live_timer, |
db1da059 | 1215 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1216 | session->creation_time, |
1217 | session->name_contains_creation_time); | |
2f77fc4b | 1218 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1219 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1220 | goto error; |
1221 | } | |
6dc3064a DG |
1222 | /* Session is now ready for network streaming. */ |
1223 | session->net_handle = 1; | |
2f77fc4b | 1224 | } |
b31610f2 JD |
1225 | session->consumer->relay_major_version = |
1226 | usess->consumer->relay_major_version; | |
1227 | session->consumer->relay_minor_version = | |
1228 | usess->consumer->relay_minor_version; | |
eacb7b6f MD |
1229 | session->consumer->relay_allows_clear = |
1230 | usess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1231 | } |
1232 | ||
1233 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
1234 | && ksess->consumer->enabled) { | |
1235 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
1236 | socket, node.node) { | |
2f77fc4b | 1237 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1238 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
1239 | ksess->consumer, socket, |
1240 | session->name, session->hostname, | |
6fa5fe7c | 1241 | session->base_path, |
1e791a74 | 1242 | session->live_timer, |
db1da059 | 1243 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1244 | session->creation_time, |
1245 | session->name_contains_creation_time); | |
2f77fc4b | 1246 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1247 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1248 | goto error; |
1249 | } | |
6dc3064a DG |
1250 | /* Session is now ready for network streaming. */ |
1251 | session->net_handle = 1; | |
2f77fc4b | 1252 | } |
b31610f2 JD |
1253 | session->consumer->relay_major_version = |
1254 | ksess->consumer->relay_major_version; | |
1255 | session->consumer->relay_minor_version = | |
1256 | ksess->consumer->relay_minor_version; | |
eacb7b6f MD |
1257 | session->consumer->relay_allows_clear = |
1258 | ksess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1259 | } |
1260 | ||
1261 | error: | |
e7fe706f | 1262 | rcu_read_unlock(); |
2f77fc4b DG |
1263 | return ret; |
1264 | } | |
1265 | ||
9b6c7ec5 DG |
1266 | /* |
1267 | * Start a kernel session by opening all necessary streams. | |
1268 | */ | |
4dbe1875 | 1269 | int start_kernel_session(struct ltt_kernel_session *ksess) |
9b6c7ec5 DG |
1270 | { |
1271 | int ret; | |
1272 | struct ltt_kernel_channel *kchan; | |
1273 | ||
1274 | /* Open kernel metadata */ | |
07b86b52 | 1275 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
1276 | ret = kernel_open_metadata(ksess); |
1277 | if (ret < 0) { | |
1278 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1279 | goto error; | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | /* Open kernel metadata stream */ | |
07b86b52 | 1284 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1285 | ret = kernel_open_metadata_stream(ksess); |
1286 | if (ret < 0) { | |
1287 | ERR("Kernel create metadata stream failed"); | |
1288 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1289 | goto error; | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | /* For each channel */ | |
1294 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1295 | if (kchan->stream_count == 0) { | |
1296 | ret = kernel_open_channel_stream(kchan); | |
1297 | if (ret < 0) { | |
1298 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1299 | goto error; | |
1300 | } | |
1301 | /* Update the stream global counter */ | |
1302 | ksess->stream_count_global += ret; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | /* Setup kernel consumer socket and send fds to it */ | |
1307 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1308 | if (ret != 0) { |
9b6c7ec5 DG |
1309 | ret = LTTNG_ERR_KERN_START_FAIL; |
1310 | goto error; | |
1311 | } | |
1312 | ||
1313 | /* This start the kernel tracing */ | |
1314 | ret = kernel_start_session(ksess); | |
1315 | if (ret < 0) { | |
1316 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1317 | goto error; | |
1318 | } | |
1319 | ||
1320 | /* Quiescent wait after starting trace */ | |
7d268848 | 1321 | kernel_wait_quiescent(); |
9b6c7ec5 | 1322 | |
14fb1ebe | 1323 | ksess->active = 1; |
9b6c7ec5 DG |
1324 | |
1325 | ret = LTTNG_OK; | |
1326 | ||
1327 | error: | |
1328 | return ret; | |
1329 | } | |
1330 | ||
4dbe1875 MD |
1331 | int stop_kernel_session(struct ltt_kernel_session *ksess) |
1332 | { | |
1333 | struct ltt_kernel_channel *kchan; | |
1334 | bool error_occurred = false; | |
1335 | int ret; | |
1336 | ||
1337 | if (!ksess || !ksess->active) { | |
1338 | return LTTNG_OK; | |
1339 | } | |
1340 | DBG("Stopping kernel tracing"); | |
1341 | ||
1342 | ret = kernel_stop_session(ksess); | |
1343 | if (ret < 0) { | |
1344 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1345 | goto error; | |
1346 | } | |
1347 | ||
1348 | kernel_wait_quiescent(); | |
1349 | ||
1350 | /* Flush metadata after stopping (if exists) */ | |
1351 | if (ksess->metadata_stream_fd >= 0) { | |
1352 | ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd); | |
1353 | if (ret < 0) { | |
1354 | ERR("Kernel metadata flush failed"); | |
1355 | error_occurred = true; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | /* Flush all buffers after stopping */ | |
1360 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1361 | ret = kernel_flush_buffer(kchan); | |
1362 | if (ret < 0) { | |
1363 | ERR("Kernel flush buffer error"); | |
1364 | error_occurred = true; | |
1365 | } | |
1366 | } | |
1367 | ||
1368 | ksess->active = 0; | |
1369 | if (error_occurred) { | |
1370 | ret = LTTNG_ERR_UNK; | |
1371 | } else { | |
1372 | ret = LTTNG_OK; | |
1373 | } | |
1374 | error: | |
1375 | return ret; | |
1376 | } | |
1377 | ||
2f77fc4b DG |
1378 | /* |
1379 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1380 | */ | |
56a37563 JG |
1381 | int cmd_disable_channel(struct ltt_session *session, |
1382 | enum lttng_domain_type domain, char *channel_name) | |
2f77fc4b DG |
1383 | { |
1384 | int ret; | |
1385 | struct ltt_ust_session *usess; | |
1386 | ||
1387 | usess = session->ust_session; | |
1388 | ||
2223c96f DG |
1389 | rcu_read_lock(); |
1390 | ||
2f77fc4b DG |
1391 | switch (domain) { |
1392 | case LTTNG_DOMAIN_KERNEL: | |
1393 | { | |
1394 | ret = channel_kernel_disable(session->kernel_session, | |
1395 | channel_name); | |
f73fabfd | 1396 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1397 | goto error; |
1398 | } | |
1399 | ||
7d268848 | 1400 | kernel_wait_quiescent(); |
2f77fc4b DG |
1401 | break; |
1402 | } | |
1403 | case LTTNG_DOMAIN_UST: | |
1404 | { | |
1405 | struct ltt_ust_channel *uchan; | |
1406 | struct lttng_ht *chan_ht; | |
1407 | ||
1408 | chan_ht = usess->domain_global.channels; | |
1409 | ||
1410 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
1411 | if (uchan == NULL) { | |
f73fabfd | 1412 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1413 | goto error; |
1414 | } | |
1415 | ||
7972aab2 | 1416 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1417 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1418 | goto error; |
1419 | } | |
1420 | break; | |
1421 | } | |
2f77fc4b | 1422 | default: |
f73fabfd | 1423 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1424 | goto error; |
1425 | } | |
1426 | ||
f73fabfd | 1427 | ret = LTTNG_OK; |
2f77fc4b DG |
1428 | |
1429 | error: | |
2223c96f | 1430 | rcu_read_unlock(); |
2f77fc4b DG |
1431 | return ret; |
1432 | } | |
1433 | ||
ccf10263 | 1434 | /* |
55c9e7ca | 1435 | * Command LTTNG_TRACK_ID processed by the client thread. |
a9ad0c8f MD |
1436 | * |
1437 | * Called with session lock held. | |
ccf10263 | 1438 | */ |
55c9e7ca JR |
1439 | int cmd_track_id(struct ltt_session *session, |
1440 | enum lttng_tracker_type tracker_type, | |
1441 | enum lttng_domain_type domain, | |
1442 | const struct lttng_tracker_id *id) | |
ccf10263 MD |
1443 | { |
1444 | int ret; | |
1445 | ||
1446 | rcu_read_lock(); | |
1447 | ||
1448 | switch (domain) { | |
1449 | case LTTNG_DOMAIN_KERNEL: | |
1450 | { | |
1451 | struct ltt_kernel_session *ksess; | |
1452 | ||
1453 | ksess = session->kernel_session; | |
1454 | ||
55c9e7ca | 1455 | ret = kernel_track_id(tracker_type, ksess, id); |
ccf10263 MD |
1456 | if (ret != LTTNG_OK) { |
1457 | goto error; | |
1458 | } | |
1459 | ||
7d268848 | 1460 | kernel_wait_quiescent(); |
ccf10263 MD |
1461 | break; |
1462 | } | |
ccf10263 | 1463 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
1464 | { |
1465 | struct ltt_ust_session *usess; | |
1466 | ||
1467 | usess = session->ust_session; | |
1468 | ||
55c9e7ca | 1469 | ret = trace_ust_track_id(tracker_type, usess, id); |
a9ad0c8f MD |
1470 | if (ret != LTTNG_OK) { |
1471 | goto error; | |
1472 | } | |
1473 | break; | |
1474 | } | |
ccf10263 MD |
1475 | default: |
1476 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1477 | goto error; | |
1478 | } | |
1479 | ||
1480 | ret = LTTNG_OK; | |
1481 | ||
1482 | error: | |
1483 | rcu_read_unlock(); | |
1484 | return ret; | |
1485 | } | |
1486 | ||
1487 | /* | |
55c9e7ca | 1488 | * Command LTTNG_UNTRACK_ID processed by the client thread. |
a9ad0c8f MD |
1489 | * |
1490 | * Called with session lock held. | |
ccf10263 | 1491 | */ |
55c9e7ca JR |
1492 | int cmd_untrack_id(struct ltt_session *session, |
1493 | enum lttng_tracker_type tracker_type, | |
1494 | enum lttng_domain_type domain, | |
1495 | const struct lttng_tracker_id *id) | |
ccf10263 MD |
1496 | { |
1497 | int ret; | |
1498 | ||
1499 | rcu_read_lock(); | |
1500 | ||
1501 | switch (domain) { | |
1502 | case LTTNG_DOMAIN_KERNEL: | |
1503 | { | |
1504 | struct ltt_kernel_session *ksess; | |
1505 | ||
1506 | ksess = session->kernel_session; | |
1507 | ||
55c9e7ca | 1508 | ret = kernel_untrack_id(tracker_type, ksess, id); |
ccf10263 MD |
1509 | if (ret != LTTNG_OK) { |
1510 | goto error; | |
1511 | } | |
1512 | ||
7d268848 | 1513 | kernel_wait_quiescent(); |
ccf10263 MD |
1514 | break; |
1515 | } | |
ccf10263 | 1516 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
1517 | { |
1518 | struct ltt_ust_session *usess; | |
1519 | ||
1520 | usess = session->ust_session; | |
1521 | ||
55c9e7ca | 1522 | ret = trace_ust_untrack_id(tracker_type, usess, id); |
a9ad0c8f MD |
1523 | if (ret != LTTNG_OK) { |
1524 | goto error; | |
1525 | } | |
1526 | break; | |
1527 | } | |
ccf10263 MD |
1528 | default: |
1529 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1530 | goto error; | |
1531 | } | |
1532 | ||
1533 | ret = LTTNG_OK; | |
1534 | ||
1535 | error: | |
1536 | rcu_read_unlock(); | |
1537 | return ret; | |
1538 | } | |
1539 | ||
2f77fc4b DG |
1540 | /* |
1541 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1542 | * | |
1543 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1544 | */ | |
1545 | int cmd_enable_channel(struct ltt_session *session, | |
df4f5a87 | 1546 | const struct lttng_domain *domain, const struct lttng_channel *_attr, int wpipe) |
2f77fc4b DG |
1547 | { |
1548 | int ret; | |
1549 | struct ltt_ust_session *usess = session->ust_session; | |
1550 | struct lttng_ht *chan_ht; | |
1f345e94 | 1551 | size_t len; |
df4f5a87 | 1552 | struct lttng_channel attr; |
2f77fc4b DG |
1553 | |
1554 | assert(session); | |
df4f5a87 | 1555 | assert(_attr); |
7972aab2 | 1556 | assert(domain); |
2f77fc4b | 1557 | |
df4f5a87 JG |
1558 | attr = *_attr; |
1559 | len = lttng_strnlen(attr.name, sizeof(attr.name)); | |
1f345e94 PP |
1560 | |
1561 | /* Validate channel name */ | |
df4f5a87 JG |
1562 | if (attr.name[0] == '.' || |
1563 | memchr(attr.name, '/', len) != NULL) { | |
1f345e94 PP |
1564 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; |
1565 | goto end; | |
1566 | } | |
1567 | ||
df4f5a87 | 1568 | DBG("Enabling channel %s for session %s", attr.name, session->name); |
2f77fc4b | 1569 | |
03b4fdcf DG |
1570 | rcu_read_lock(); |
1571 | ||
ecc48a90 JD |
1572 | /* |
1573 | * Don't try to enable a channel if the session has been started at | |
1574 | * some point in time before. The tracer does not allow it. | |
1575 | */ | |
8382cf6f | 1576 | if (session->has_been_started) { |
ecc48a90 JD |
1577 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1578 | goto error; | |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * If the session is a live session, remove the switch timer, the | |
1583 | * live timer does the same thing but sends also synchronisation | |
1584 | * beacons for inactive streams. | |
1585 | */ | |
1586 | if (session->live_timer > 0) { | |
df4f5a87 JG |
1587 | attr.attr.live_timer_interval = session->live_timer; |
1588 | attr.attr.switch_timer_interval = 0; | |
ecc48a90 JD |
1589 | } |
1590 | ||
6e21424e JR |
1591 | /* Check for feature support */ |
1592 | switch (domain->type) { | |
1593 | case LTTNG_DOMAIN_KERNEL: | |
1594 | { | |
7d268848 | 1595 | if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) { |
6e21424e JR |
1596 | /* Sampling position of buffer is not supported */ |
1597 | WARN("Kernel tracer does not support buffer monitoring. " | |
1598 | "Setting the monitor interval timer to 0 " | |
1599 | "(disabled) for channel '%s' of session '%s'", | |
df4f5a87 JG |
1600 | attr.name, session->name); |
1601 | lttng_channel_set_monitor_timer_interval(&attr, 0); | |
6e21424e JR |
1602 | } |
1603 | break; | |
1604 | } | |
1605 | case LTTNG_DOMAIN_UST: | |
f28f9e44 | 1606 | break; |
6e21424e JR |
1607 | case LTTNG_DOMAIN_JUL: |
1608 | case LTTNG_DOMAIN_LOG4J: | |
1609 | case LTTNG_DOMAIN_PYTHON: | |
f28f9e44 JG |
1610 | if (!agent_tracing_is_enabled()) { |
1611 | DBG("Attempted to enable a channel in an agent domain but the agent thread is not running"); | |
1612 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
1613 | goto error; | |
1614 | } | |
6e21424e JR |
1615 | break; |
1616 | default: | |
1617 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1618 | goto error; | |
1619 | } | |
1620 | ||
7972aab2 | 1621 | switch (domain->type) { |
2f77fc4b DG |
1622 | case LTTNG_DOMAIN_KERNEL: |
1623 | { | |
1624 | struct ltt_kernel_channel *kchan; | |
1625 | ||
df4f5a87 | 1626 | kchan = trace_kernel_get_channel_by_name(attr.name, |
2f77fc4b DG |
1627 | session->kernel_session); |
1628 | if (kchan == NULL) { | |
54213acc JG |
1629 | if (session->snapshot.nb_output > 0 || |
1630 | session->snapshot_mode) { | |
1631 | /* Enforce mmap output for snapshot sessions. */ | |
df4f5a87 | 1632 | attr.attr.output = LTTNG_EVENT_MMAP; |
54213acc | 1633 | } |
df4f5a87 JG |
1634 | ret = channel_kernel_create(session->kernel_session, &attr, wpipe); |
1635 | if (attr.name[0] != '\0') { | |
85076754 MD |
1636 | session->kernel_session->has_non_default_channel = 1; |
1637 | } | |
2f77fc4b DG |
1638 | } else { |
1639 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1640 | } | |
1641 | ||
f73fabfd | 1642 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1643 | goto error; |
1644 | } | |
1645 | ||
7d268848 | 1646 | kernel_wait_quiescent(); |
2f77fc4b DG |
1647 | break; |
1648 | } | |
1649 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1650 | case LTTNG_DOMAIN_JUL: |
1651 | case LTTNG_DOMAIN_LOG4J: | |
1652 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1653 | { |
1654 | struct ltt_ust_channel *uchan; | |
1655 | ||
9232818f JG |
1656 | /* |
1657 | * FIXME | |
1658 | * | |
1659 | * Current agent implementation limitations force us to allow | |
1660 | * only one channel at once in "agent" subdomains. Each | |
1661 | * subdomain has a default channel name which must be strictly | |
1662 | * adhered to. | |
1663 | */ | |
1664 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
df4f5a87 | 1665 | if (strncmp(attr.name, DEFAULT_JUL_CHANNEL_NAME, |
9232818f JG |
1666 | LTTNG_SYMBOL_NAME_LEN)) { |
1667 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1668 | goto error; | |
1669 | } | |
1670 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
df4f5a87 | 1671 | if (strncmp(attr.name, DEFAULT_LOG4J_CHANNEL_NAME, |
9232818f JG |
1672 | LTTNG_SYMBOL_NAME_LEN)) { |
1673 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1674 | goto error; | |
1675 | } | |
1676 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
df4f5a87 | 1677 | if (strncmp(attr.name, DEFAULT_PYTHON_CHANNEL_NAME, |
9232818f JG |
1678 | LTTNG_SYMBOL_NAME_LEN)) { |
1679 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1680 | goto error; | |
1681 | } | |
1682 | } | |
1683 | ||
2f77fc4b DG |
1684 | chan_ht = usess->domain_global.channels; |
1685 | ||
df4f5a87 | 1686 | uchan = trace_ust_find_channel_by_name(chan_ht, attr.name); |
2f77fc4b | 1687 | if (uchan == NULL) { |
df4f5a87 JG |
1688 | ret = channel_ust_create(usess, &attr, domain->buf_type); |
1689 | if (attr.name[0] != '\0') { | |
85076754 MD |
1690 | usess->has_non_default_channel = 1; |
1691 | } | |
2f77fc4b | 1692 | } else { |
7972aab2 | 1693 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1694 | } |
1695 | break; | |
1696 | } | |
2f77fc4b | 1697 | default: |
f73fabfd | 1698 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1699 | goto error; |
1700 | } | |
1701 | ||
df4f5a87 | 1702 | if (ret == LTTNG_OK && attr.attr.output != LTTNG_EVENT_MMAP) { |
54213acc JG |
1703 | session->has_non_mmap_channel = true; |
1704 | } | |
2f77fc4b | 1705 | error: |
2223c96f | 1706 | rcu_read_unlock(); |
1f345e94 | 1707 | end: |
2f77fc4b DG |
1708 | return ret; |
1709 | } | |
1710 | ||
2f77fc4b DG |
1711 | /* |
1712 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1713 | */ | |
56a37563 | 1714 | int cmd_disable_event(struct ltt_session *session, |
df4f5a87 JG |
1715 | enum lttng_domain_type domain, const char *channel_name, |
1716 | const struct lttng_event *event) | |
2f77fc4b DG |
1717 | { |
1718 | int ret; | |
df4f5a87 | 1719 | const char *event_name; |
6e911cad | 1720 | |
18a720cd MD |
1721 | DBG("Disable event command for event \'%s\'", event->name); |
1722 | ||
6e911cad MD |
1723 | event_name = event->name; |
1724 | ||
9b7431cf JG |
1725 | /* Error out on unhandled search criteria */ |
1726 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad | 1727 | || event->pid || event->filter || event->exclusion) { |
7076b56e JG |
1728 | ret = LTTNG_ERR_UNK; |
1729 | goto error; | |
6e911cad | 1730 | } |
2f77fc4b | 1731 | |
2223c96f DG |
1732 | rcu_read_lock(); |
1733 | ||
2f77fc4b DG |
1734 | switch (domain) { |
1735 | case LTTNG_DOMAIN_KERNEL: | |
1736 | { | |
1737 | struct ltt_kernel_channel *kchan; | |
1738 | struct ltt_kernel_session *ksess; | |
1739 | ||
1740 | ksess = session->kernel_session; | |
1741 | ||
85076754 MD |
1742 | /* |
1743 | * If a non-default channel has been created in the | |
1744 | * session, explicitely require that -c chan_name needs | |
1745 | * to be provided. | |
1746 | */ | |
1747 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1748 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1749 | goto error_unlock; |
85076754 MD |
1750 | } |
1751 | ||
2f77fc4b DG |
1752 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1753 | if (kchan == NULL) { | |
f73fabfd | 1754 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1755 | goto error_unlock; |
2f77fc4b DG |
1756 | } |
1757 | ||
6e911cad MD |
1758 | switch (event->type) { |
1759 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1760 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1761 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1762 | case LTTNG_EVENT_PROBE: |
1763 | case LTTNG_EVENT_FUNCTION: | |
1764 | case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ | |
1765 | if (event_name[0] == '\0') { | |
1766 | ret = event_kernel_disable_event(kchan, | |
1767 | NULL, event->type); | |
29c62722 | 1768 | } else { |
d0ae4ea8 | 1769 | ret = event_kernel_disable_event(kchan, |
9550ee81 | 1770 | event_name, event->type); |
29c62722 | 1771 | } |
6e911cad | 1772 | if (ret != LTTNG_OK) { |
7076b56e | 1773 | goto error_unlock; |
6e911cad MD |
1774 | } |
1775 | break; | |
6e911cad MD |
1776 | default: |
1777 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1778 | goto error_unlock; |
2f77fc4b DG |
1779 | } |
1780 | ||
7d268848 | 1781 | kernel_wait_quiescent(); |
2f77fc4b DG |
1782 | break; |
1783 | } | |
1784 | case LTTNG_DOMAIN_UST: | |
1785 | { | |
1786 | struct ltt_ust_channel *uchan; | |
1787 | struct ltt_ust_session *usess; | |
1788 | ||
1789 | usess = session->ust_session; | |
1790 | ||
7076b56e JG |
1791 | if (validate_ust_event_name(event_name)) { |
1792 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1793 | goto error_unlock; | |
1794 | } | |
1795 | ||
85076754 MD |
1796 | /* |
1797 | * If a non-default channel has been created in the | |
9550ee81 | 1798 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1799 | * to be provided. |
1800 | */ | |
1801 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1802 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1803 | goto error_unlock; |
85076754 MD |
1804 | } |
1805 | ||
2f77fc4b DG |
1806 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1807 | channel_name); | |
1808 | if (uchan == NULL) { | |
f73fabfd | 1809 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1810 | goto error_unlock; |
2f77fc4b DG |
1811 | } |
1812 | ||
6e911cad MD |
1813 | switch (event->type) { |
1814 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1815 | /* |
1816 | * An empty event name means that everything | |
1817 | * should be disabled. | |
1818 | */ | |
1819 | if (event->name[0] == '\0') { | |
1820 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 JR |
1821 | } else { |
1822 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1823 | event_name); | |
1824 | } | |
6e911cad | 1825 | if (ret != LTTNG_OK) { |
7076b56e | 1826 | goto error_unlock; |
6e911cad MD |
1827 | } |
1828 | break; | |
1829 | default: | |
1830 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1831 | goto error_unlock; |
2f77fc4b DG |
1832 | } |
1833 | ||
1834 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1835 | channel_name); | |
1836 | break; | |
1837 | } | |
5cdb6027 | 1838 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1839 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1840 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1841 | { |
fefd409b | 1842 | struct agent *agt; |
f20baf8e DG |
1843 | struct ltt_ust_session *usess = session->ust_session; |
1844 | ||
1845 | assert(usess); | |
1846 | ||
6e911cad MD |
1847 | switch (event->type) { |
1848 | case LTTNG_EVENT_ALL: | |
1849 | break; | |
1850 | default: | |
1851 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1852 | goto error_unlock; |
6e911cad MD |
1853 | } |
1854 | ||
5cdb6027 | 1855 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1856 | if (!agt) { |
1857 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1858 | goto error_unlock; |
fefd409b | 1859 | } |
b3639870 JR |
1860 | /* |
1861 | * An empty event name means that everything | |
1862 | * should be disabled. | |
1863 | */ | |
1864 | if (event->name[0] == '\0') { | |
18a720cd MD |
1865 | ret = event_agent_disable_all(usess, agt); |
1866 | } else { | |
1867 | ret = event_agent_disable(usess, agt, event_name); | |
1868 | } | |
f20baf8e | 1869 | if (ret != LTTNG_OK) { |
7076b56e | 1870 | goto error_unlock; |
f20baf8e DG |
1871 | } |
1872 | ||
1873 | break; | |
1874 | } | |
2f77fc4b | 1875 | default: |
f73fabfd | 1876 | ret = LTTNG_ERR_UND; |
7076b56e | 1877 | goto error_unlock; |
2f77fc4b DG |
1878 | } |
1879 | ||
f73fabfd | 1880 | ret = LTTNG_OK; |
2f77fc4b | 1881 | |
7076b56e | 1882 | error_unlock: |
2223c96f | 1883 | rcu_read_unlock(); |
7076b56e | 1884 | error: |
2f77fc4b DG |
1885 | return ret; |
1886 | } | |
1887 | ||
2f77fc4b DG |
1888 | /* |
1889 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1890 | */ | |
56a37563 | 1891 | int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain, |
df4f5a87 | 1892 | char *channel_name, const struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1893 | { |
d5979e4a | 1894 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
bdf64013 JG |
1895 | char *app_ctx_provider_name = NULL, *app_ctx_name = NULL; |
1896 | ||
9a699f7b JR |
1897 | /* |
1898 | * Don't try to add a context if the session has been started at | |
1899 | * some point in time before. The tracer does not allow it and would | |
1900 | * result in a corrupted trace. | |
1901 | */ | |
1902 | if (session->has_been_started) { | |
1903 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
1904 | goto end; | |
1905 | } | |
1906 | ||
bdf64013 JG |
1907 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
1908 | app_ctx_provider_name = ctx->u.app_ctx.provider_name; | |
1909 | app_ctx_name = ctx->u.app_ctx.ctx_name; | |
1910 | } | |
2f77fc4b DG |
1911 | |
1912 | switch (domain) { | |
1913 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1914 | assert(session->kernel_session); |
1915 | ||
1916 | if (session->kernel_session->channel_count == 0) { | |
1917 | /* Create default channel */ | |
1918 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1919 | if (ret != LTTNG_OK) { | |
1920 | goto error; | |
1921 | } | |
d5979e4a | 1922 | chan_kern_created = 1; |
979e618e | 1923 | } |
2f77fc4b | 1924 | /* Add kernel context to kernel tracer */ |
601d5acf | 1925 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1926 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1927 | goto error; |
1928 | } | |
1929 | break; | |
bdf64013 JG |
1930 | case LTTNG_DOMAIN_JUL: |
1931 | case LTTNG_DOMAIN_LOG4J: | |
1932 | { | |
1933 | /* | |
1934 | * Validate channel name. | |
1935 | * If no channel name is given and the domain is JUL or LOG4J, | |
1936 | * set it to the appropriate domain-specific channel name. If | |
1937 | * a name is provided but does not match the expexted channel | |
1938 | * name, return an error. | |
1939 | */ | |
1940 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
1941 | strcmp(channel_name, | |
1942 | DEFAULT_JUL_CHANNEL_NAME)) { | |
1943 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1944 | goto error; | |
1945 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
1946 | strcmp(channel_name, | |
1947 | DEFAULT_LOG4J_CHANNEL_NAME)) { | |
1948 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
1949 | goto error; | |
1950 | } | |
a93b3916 | 1951 | /* break is _not_ missing here. */ |
bdf64013 | 1952 | } |
2f77fc4b DG |
1953 | case LTTNG_DOMAIN_UST: |
1954 | { | |
1955 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1956 | unsigned int chan_count; |
1957 | ||
2f77fc4b DG |
1958 | assert(usess); |
1959 | ||
85076754 | 1960 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1961 | if (chan_count == 0) { |
1962 | struct lttng_channel *attr; | |
1963 | /* Create default channel */ | |
0a9c6494 | 1964 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1965 | if (attr == NULL) { |
1966 | ret = LTTNG_ERR_FATAL; | |
1967 | goto error; | |
1968 | } | |
1969 | ||
7972aab2 | 1970 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1971 | if (ret != LTTNG_OK) { |
1972 | free(attr); | |
1973 | goto error; | |
1974 | } | |
cf0bcb51 | 1975 | channel_attr_destroy(attr); |
d5979e4a | 1976 | chan_ust_created = 1; |
979e618e DG |
1977 | } |
1978 | ||
601d5acf | 1979 | ret = context_ust_add(usess, domain, ctx, channel_name); |
bdf64013 JG |
1980 | free(app_ctx_provider_name); |
1981 | free(app_ctx_name); | |
1982 | app_ctx_name = NULL; | |
1983 | app_ctx_provider_name = NULL; | |
f73fabfd | 1984 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1985 | goto error; |
1986 | } | |
1987 | break; | |
1988 | } | |
2f77fc4b | 1989 | default: |
f73fabfd | 1990 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1991 | goto error; |
1992 | } | |
1993 | ||
bdf64013 JG |
1994 | ret = LTTNG_OK; |
1995 | goto end; | |
2f77fc4b DG |
1996 | |
1997 | error: | |
d5979e4a DG |
1998 | if (chan_kern_created) { |
1999 | struct ltt_kernel_channel *kchan = | |
2000 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
2001 | session->kernel_session); | |
2002 | /* Created previously, this should NOT fail. */ | |
2003 | assert(kchan); | |
2004 | kernel_destroy_channel(kchan); | |
2005 | } | |
2006 | ||
2007 | if (chan_ust_created) { | |
2008 | struct ltt_ust_channel *uchan = | |
2009 | trace_ust_find_channel_by_name( | |
2010 | session->ust_session->domain_global.channels, | |
2011 | DEFAULT_CHANNEL_NAME); | |
2012 | /* Created previously, this should NOT fail. */ | |
2013 | assert(uchan); | |
2014 | /* Remove from the channel list of the session. */ | |
2015 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
2016 | uchan); | |
2017 | trace_ust_destroy_channel(uchan); | |
2018 | } | |
bdf64013 JG |
2019 | end: |
2020 | free(app_ctx_provider_name); | |
2021 | free(app_ctx_name); | |
2f77fc4b DG |
2022 | return ret; |
2023 | } | |
2024 | ||
dac8e046 JG |
2025 | static inline bool name_starts_with(const char *name, const char *prefix) |
2026 | { | |
2027 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
2028 | ||
2029 | return !strncmp(name, prefix, max_cmp_len); | |
2030 | } | |
2031 | ||
2032 | /* Perform userspace-specific event name validation */ | |
2033 | static int validate_ust_event_name(const char *name) | |
2034 | { | |
2035 | int ret = 0; | |
2036 | ||
2037 | if (!name) { | |
2038 | ret = -1; | |
2039 | goto end; | |
2040 | } | |
2041 | ||
2042 | /* | |
2043 | * Check name against all internal UST event component namespaces used | |
2044 | * by the agents. | |
2045 | */ | |
2046 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
2047 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
2048 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
2049 | ret = -1; | |
2050 | } | |
2051 | ||
2052 | end: | |
2053 | return ret; | |
2054 | } | |
88f06f15 | 2055 | |
2f77fc4b | 2056 | /* |
88f06f15 JG |
2057 | * Internal version of cmd_enable_event() with a supplemental |
2058 | * "internal_event" flag which is used to enable internal events which should | |
2059 | * be hidden from clients. Such events are used in the agent implementation to | |
2060 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 2061 | */ |
88f06f15 | 2062 | static int _cmd_enable_event(struct ltt_session *session, |
df4f5a87 | 2063 | const struct lttng_domain *domain, |
025faf73 | 2064 | char *channel_name, struct lttng_event *event, |
6b453b5e | 2065 | char *filter_expression, |
db8f1377 JI |
2066 | struct lttng_filter_bytecode *filter, |
2067 | struct lttng_event_exclusion *exclusion, | |
88f06f15 | 2068 | int wpipe, bool internal_event) |
2f77fc4b | 2069 | { |
9f449915 | 2070 | int ret = 0, channel_created = 0; |
cfedea03 | 2071 | struct lttng_channel *attr = NULL; |
2f77fc4b DG |
2072 | |
2073 | assert(session); | |
2074 | assert(event); | |
2075 | assert(channel_name); | |
2076 | ||
2a385866 JG |
2077 | /* If we have a filter, we must have its filter expression */ |
2078 | assert(!(!!filter_expression ^ !!filter)); | |
2079 | ||
9f449915 PP |
2080 | /* Normalize event name as a globbing pattern */ |
2081 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 2082 | |
9f449915 PP |
2083 | /* Normalize exclusion names as globbing patterns */ |
2084 | if (exclusion) { | |
2085 | size_t i; | |
f5ac4bd7 | 2086 | |
9f449915 PP |
2087 | for (i = 0; i < exclusion->count; i++) { |
2088 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
2089 | ||
2090 | strutils_normalize_star_glob_pattern(name); | |
2091 | } | |
930a2e99 JG |
2092 | } |
2093 | ||
9f449915 PP |
2094 | DBG("Enable event command for event \'%s\'", event->name); |
2095 | ||
2096 | rcu_read_lock(); | |
2097 | ||
7972aab2 | 2098 | switch (domain->type) { |
2f77fc4b DG |
2099 | case LTTNG_DOMAIN_KERNEL: |
2100 | { | |
2101 | struct ltt_kernel_channel *kchan; | |
2102 | ||
85076754 MD |
2103 | /* |
2104 | * If a non-default channel has been created in the | |
2105 | * session, explicitely require that -c chan_name needs | |
2106 | * to be provided. | |
2107 | */ | |
2108 | if (session->kernel_session->has_non_default_channel | |
2109 | && channel_name[0] == '\0') { | |
2110 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2111 | goto error; | |
2112 | } | |
2113 | ||
2f77fc4b DG |
2114 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2115 | session->kernel_session); | |
2116 | if (kchan == NULL) { | |
0a9c6494 DG |
2117 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
2118 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 2119 | if (attr == NULL) { |
f73fabfd | 2120 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2121 | goto error; |
2122 | } | |
04c17253 MD |
2123 | if (lttng_strncpy(attr->name, channel_name, |
2124 | sizeof(attr->name))) { | |
2125 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2126 | goto error; |
2127 | } | |
2f77fc4b DG |
2128 | |
2129 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2130 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2131 | goto error; |
2132 | } | |
e5f5db7f | 2133 | channel_created = 1; |
2f77fc4b DG |
2134 | } |
2135 | ||
2136 | /* Get the newly created kernel channel pointer */ | |
2137 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2138 | session->kernel_session); | |
2139 | if (kchan == NULL) { | |
2140 | /* This sould not happen... */ | |
f73fabfd | 2141 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2142 | goto error; |
2143 | } | |
2144 | ||
6e911cad MD |
2145 | switch (event->type) { |
2146 | case LTTNG_EVENT_ALL: | |
29c62722 | 2147 | { |
00a62084 MD |
2148 | char *filter_expression_a = NULL; |
2149 | struct lttng_filter_bytecode *filter_a = NULL; | |
2150 | ||
2151 | /* | |
2152 | * We need to duplicate filter_expression and filter, | |
2153 | * because ownership is passed to first enable | |
2154 | * event. | |
2155 | */ | |
2156 | if (filter_expression) { | |
2157 | filter_expression_a = strdup(filter_expression); | |
2158 | if (!filter_expression_a) { | |
2159 | ret = LTTNG_ERR_FATAL; | |
2160 | goto error; | |
2161 | } | |
2162 | } | |
2163 | if (filter) { | |
2164 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
2165 | if (!filter_a) { | |
2166 | free(filter_expression_a); | |
2167 | ret = LTTNG_ERR_FATAL; | |
2168 | goto error; | |
2169 | } | |
2170 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
2171 | } | |
29c62722 | 2172 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
2173 | ret = event_kernel_enable_event(kchan, event, |
2174 | filter_expression, filter); | |
a969e101 MD |
2175 | /* We have passed ownership */ |
2176 | filter_expression = NULL; | |
2177 | filter = NULL; | |
29c62722 MD |
2178 | if (ret != LTTNG_OK) { |
2179 | if (channel_created) { | |
2180 | /* Let's not leak a useless channel. */ | |
2181 | kernel_destroy_channel(kchan); | |
2182 | } | |
00a62084 MD |
2183 | free(filter_expression_a); |
2184 | free(filter_a); | |
29c62722 MD |
2185 | goto error; |
2186 | } | |
2187 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
2188 | ret = event_kernel_enable_event(kchan, event, |
2189 | filter_expression_a, filter_a); | |
60d21fa2 AB |
2190 | /* We have passed ownership */ |
2191 | filter_expression_a = NULL; | |
2192 | filter_a = NULL; | |
29c62722 MD |
2193 | if (ret != LTTNG_OK) { |
2194 | goto error; | |
2195 | } | |
2196 | break; | |
2197 | } | |
6e6ef3d7 | 2198 | case LTTNG_EVENT_PROBE: |
dcabc190 | 2199 | case LTTNG_EVENT_USERSPACE_PROBE: |
6e6ef3d7 DG |
2200 | case LTTNG_EVENT_FUNCTION: |
2201 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 2202 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
2203 | ret = event_kernel_enable_event(kchan, event, |
2204 | filter_expression, filter); | |
a969e101 MD |
2205 | /* We have passed ownership */ |
2206 | filter_expression = NULL; | |
2207 | filter = NULL; | |
6e911cad MD |
2208 | if (ret != LTTNG_OK) { |
2209 | if (channel_created) { | |
2210 | /* Let's not leak a useless channel. */ | |
2211 | kernel_destroy_channel(kchan); | |
2212 | } | |
2213 | goto error; | |
e5f5db7f | 2214 | } |
6e911cad MD |
2215 | break; |
2216 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
2217 | ret = event_kernel_enable_event(kchan, event, |
2218 | filter_expression, filter); | |
a969e101 MD |
2219 | /* We have passed ownership */ |
2220 | filter_expression = NULL; | |
2221 | filter = NULL; | |
e2b957af MD |
2222 | if (ret != LTTNG_OK) { |
2223 | goto error; | |
2224 | } | |
6e911cad MD |
2225 | break; |
2226 | default: | |
2227 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
2228 | goto error; |
2229 | } | |
2230 | ||
7d268848 | 2231 | kernel_wait_quiescent(); |
2f77fc4b DG |
2232 | break; |
2233 | } | |
2234 | case LTTNG_DOMAIN_UST: | |
2235 | { | |
2236 | struct ltt_ust_channel *uchan; | |
2237 | struct ltt_ust_session *usess = session->ust_session; | |
2238 | ||
2239 | assert(usess); | |
2240 | ||
85076754 MD |
2241 | /* |
2242 | * If a non-default channel has been created in the | |
2243 | * session, explicitely require that -c chan_name needs | |
2244 | * to be provided. | |
2245 | */ | |
2246 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
2247 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2248 | goto error; | |
2249 | } | |
2250 | ||
2f77fc4b DG |
2251 | /* Get channel from global UST domain */ |
2252 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2253 | channel_name); | |
2254 | if (uchan == NULL) { | |
2255 | /* Create default channel */ | |
0a9c6494 DG |
2256 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
2257 | usess->buffer_type); | |
2f77fc4b | 2258 | if (attr == NULL) { |
f73fabfd | 2259 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2260 | goto error; |
2261 | } | |
04c17253 MD |
2262 | if (lttng_strncpy(attr->name, channel_name, |
2263 | sizeof(attr->name))) { | |
2264 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2265 | goto error; |
2266 | } | |
2f77fc4b DG |
2267 | |
2268 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2269 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2270 | goto error; |
2271 | } | |
2f77fc4b DG |
2272 | |
2273 | /* Get the newly created channel reference back */ | |
2274 | uchan = trace_ust_find_channel_by_name( | |
2275 | usess->domain_global.channels, channel_name); | |
2276 | assert(uchan); | |
2277 | } | |
2278 | ||
141feb8c JG |
2279 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2280 | /* | |
2281 | * Don't allow users to add UST events to channels which | |
2282 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2283 | * Python, etc.). | |
2284 | */ | |
2285 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2286 | goto error; | |
2287 | } | |
2288 | ||
dac8e046 JG |
2289 | if (!internal_event) { |
2290 | /* | |
2291 | * Ensure the event name is not reserved for internal | |
2292 | * use. | |
2293 | */ | |
2294 | ret = validate_ust_event_name(event->name); | |
2295 | if (ret) { | |
2296 | WARN("Userspace event name %s failed validation.", | |
bbcab087 | 2297 | event->name); |
dac8e046 JG |
2298 | ret = LTTNG_ERR_INVALID_EVENT_NAME; |
2299 | goto error; | |
2300 | } | |
2301 | } | |
2302 | ||
2f77fc4b | 2303 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 2304 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
88f06f15 JG |
2305 | filter_expression, filter, exclusion, |
2306 | internal_event); | |
49d21f93 MD |
2307 | /* We have passed ownership */ |
2308 | filter_expression = NULL; | |
2309 | filter = NULL; | |
2310 | exclusion = NULL; | |
94382e15 JG |
2311 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2312 | goto already_enabled; | |
2313 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2314 | goto error; |
2315 | } | |
2316 | break; | |
2317 | } | |
5cdb6027 | 2318 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2319 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2320 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2321 | { |
da6c3a50 | 2322 | const char *default_event_name, *default_chan_name; |
fefd409b | 2323 | struct agent *agt; |
f20baf8e DG |
2324 | struct lttng_event uevent; |
2325 | struct lttng_domain tmp_dom; | |
2326 | struct ltt_ust_session *usess = session->ust_session; | |
2327 | ||
2328 | assert(usess); | |
2329 | ||
f28f9e44 JG |
2330 | if (!agent_tracing_is_enabled()) { |
2331 | DBG("Attempted to enable an event in an agent domain but the agent thread is not running"); | |
2332 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
2333 | goto error; | |
2334 | } | |
2335 | ||
5cdb6027 | 2336 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2337 | if (!agt) { |
5cdb6027 | 2338 | agt = agent_create(domain->type); |
fefd409b | 2339 | if (!agt) { |
e5b3c48c | 2340 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2341 | goto error; |
2342 | } | |
2343 | agent_add(agt, usess->agents); | |
2344 | } | |
2345 | ||
022d91ba | 2346 | /* Create the default tracepoint. */ |
996de3c7 | 2347 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2348 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2349 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
51755dc8 JG |
2350 | default_event_name = event_get_default_agent_ust_name( |
2351 | domain->type); | |
da6c3a50 | 2352 | if (!default_event_name) { |
e5b3c48c | 2353 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2354 | goto error; |
f43f95a9 | 2355 | } |
da6c3a50 | 2356 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2357 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2358 | ||
2359 | /* | |
2360 | * The domain type is changed because we are about to enable the | |
2361 | * default channel and event for the JUL domain that are hardcoded. | |
2362 | * This happens in the UST domain. | |
2363 | */ | |
2364 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2365 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2366 | ||
0e115563 DG |
2367 | switch (domain->type) { |
2368 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2369 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2370 | break; |
2371 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2372 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2373 | break; |
2374 | case LTTNG_DOMAIN_PYTHON: | |
2375 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2376 | break; | |
2377 | default: | |
e98a44b0 | 2378 | /* The switch/case we are in makes this impossible */ |
0e115563 | 2379 | assert(0); |
da6c3a50 DG |
2380 | } |
2381 | ||
971da06a | 2382 | { |
8404118c | 2383 | char *filter_expression_copy = NULL; |
51755dc8 | 2384 | struct lttng_filter_bytecode *filter_copy = NULL; |
971da06a JG |
2385 | |
2386 | if (filter) { | |
51755dc8 JG |
2387 | const size_t filter_size = sizeof( |
2388 | struct lttng_filter_bytecode) | |
2389 | + filter->len; | |
2390 | ||
2391 | filter_copy = zmalloc(filter_size); | |
971da06a | 2392 | if (!filter_copy) { |
018096a4 | 2393 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2394 | goto error; |
971da06a | 2395 | } |
51755dc8 | 2396 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2397 | |
8404118c JG |
2398 | filter_expression_copy = |
2399 | strdup(filter_expression); | |
2400 | if (!filter_expression) { | |
2401 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2402 | } |
2403 | ||
2404 | if (!filter_expression_copy || !filter_copy) { | |
2405 | free(filter_expression_copy); | |
2406 | free(filter_copy); | |
2407 | goto error; | |
8404118c | 2408 | } |
971da06a JG |
2409 | } |
2410 | ||
88f06f15 | 2411 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a | 2412 | (char *) default_chan_name, |
8404118c JG |
2413 | &uevent, filter_expression_copy, |
2414 | filter_copy, NULL, wpipe); | |
971da06a JG |
2415 | } |
2416 | ||
94382e15 JG |
2417 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2418 | goto already_enabled; | |
2419 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2420 | goto error; |
2421 | } | |
2422 | ||
2423 | /* The wild card * means that everything should be enabled. */ | |
2424 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8404118c JG |
2425 | ret = event_agent_enable_all(usess, agt, event, filter, |
2426 | filter_expression); | |
f20baf8e | 2427 | } else { |
8404118c JG |
2428 | ret = event_agent_enable(usess, agt, event, filter, |
2429 | filter_expression); | |
f20baf8e | 2430 | } |
51755dc8 JG |
2431 | filter = NULL; |
2432 | filter_expression = NULL; | |
f20baf8e DG |
2433 | if (ret != LTTNG_OK) { |
2434 | goto error; | |
2435 | } | |
2436 | ||
2437 | break; | |
2438 | } | |
2f77fc4b | 2439 | default: |
f73fabfd | 2440 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2441 | goto error; |
2442 | } | |
2443 | ||
f73fabfd | 2444 | ret = LTTNG_OK; |
2f77fc4b | 2445 | |
94382e15 | 2446 | already_enabled: |
2f77fc4b | 2447 | error: |
49d21f93 MD |
2448 | free(filter_expression); |
2449 | free(filter); | |
2450 | free(exclusion); | |
cf0bcb51 | 2451 | channel_attr_destroy(attr); |
2223c96f | 2452 | rcu_read_unlock(); |
2f77fc4b DG |
2453 | return ret; |
2454 | } | |
2455 | ||
88f06f15 JG |
2456 | /* |
2457 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2458 | * We own filter, exclusion, and filter_expression. | |
2459 | */ | |
df4f5a87 JG |
2460 | int cmd_enable_event(struct ltt_session *session, |
2461 | const struct lttng_domain *domain, | |
88f06f15 JG |
2462 | char *channel_name, struct lttng_event *event, |
2463 | char *filter_expression, | |
2464 | struct lttng_filter_bytecode *filter, | |
2465 | struct lttng_event_exclusion *exclusion, | |
2466 | int wpipe) | |
2467 | { | |
2468 | return _cmd_enable_event(session, domain, channel_name, event, | |
2469 | filter_expression, filter, exclusion, wpipe, false); | |
2470 | } | |
2471 | ||
2472 | /* | |
2473 | * Enable an event which is internal to LTTng. An internal should | |
2474 | * never be made visible to clients and are immune to checks such as | |
2475 | * reserved names. | |
2476 | */ | |
2477 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 2478 | const struct lttng_domain *domain, |
88f06f15 JG |
2479 | char *channel_name, struct lttng_event *event, |
2480 | char *filter_expression, | |
2481 | struct lttng_filter_bytecode *filter, | |
2482 | struct lttng_event_exclusion *exclusion, | |
2483 | int wpipe) | |
2484 | { | |
2485 | return _cmd_enable_event(session, domain, channel_name, event, | |
2486 | filter_expression, filter, exclusion, wpipe, true); | |
2487 | } | |
2488 | ||
2f77fc4b DG |
2489 | /* |
2490 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2491 | */ | |
56a37563 JG |
2492 | ssize_t cmd_list_tracepoints(enum lttng_domain_type domain, |
2493 | struct lttng_event **events) | |
2f77fc4b DG |
2494 | { |
2495 | int ret; | |
2496 | ssize_t nb_events = 0; | |
2497 | ||
2498 | switch (domain) { | |
2499 | case LTTNG_DOMAIN_KERNEL: | |
7d268848 | 2500 | nb_events = kernel_list_events(events); |
2f77fc4b | 2501 | if (nb_events < 0) { |
f73fabfd | 2502 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2503 | goto error; |
2504 | } | |
2505 | break; | |
2506 | case LTTNG_DOMAIN_UST: | |
2507 | nb_events = ust_app_list_events(events); | |
2508 | if (nb_events < 0) { | |
f73fabfd | 2509 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2510 | goto error; |
2511 | } | |
2512 | break; | |
5cdb6027 | 2513 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2514 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2515 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 2516 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
2517 | if (nb_events < 0) { |
2518 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2519 | goto error; | |
2520 | } | |
2521 | break; | |
2f77fc4b | 2522 | default: |
f73fabfd | 2523 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2524 | goto error; |
2525 | } | |
2526 | ||
2527 | return nb_events; | |
2528 | ||
2529 | error: | |
2530 | /* Return negative value to differentiate return code */ | |
2531 | return -ret; | |
2532 | } | |
2533 | ||
2534 | /* | |
2535 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2536 | */ | |
56a37563 | 2537 | ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
2f77fc4b DG |
2538 | struct lttng_event_field **fields) |
2539 | { | |
2540 | int ret; | |
2541 | ssize_t nb_fields = 0; | |
2542 | ||
2543 | switch (domain) { | |
2544 | case LTTNG_DOMAIN_UST: | |
2545 | nb_fields = ust_app_list_event_fields(fields); | |
2546 | if (nb_fields < 0) { | |
f73fabfd | 2547 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2548 | goto error; |
2549 | } | |
2550 | break; | |
2551 | case LTTNG_DOMAIN_KERNEL: | |
2552 | default: /* fall-through */ | |
f73fabfd | 2553 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2554 | goto error; |
2555 | } | |
2556 | ||
2557 | return nb_fields; | |
2558 | ||
2559 | error: | |
2560 | /* Return negative value to differentiate return code */ | |
2561 | return -ret; | |
2562 | } | |
2563 | ||
834978fd DG |
2564 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
2565 | { | |
2566 | return syscall_table_list(events); | |
2567 | } | |
2568 | ||
a5dfbb9d | 2569 | /* |
55c9e7ca | 2570 | * Command LTTNG_LIST_TRACKER_IDS processed by the client thread. |
a5dfbb9d MD |
2571 | * |
2572 | * Called with session lock held. | |
2573 | */ | |
a7a533cd | 2574 | int cmd_list_tracker_ids(enum lttng_tracker_type tracker_type, |
55c9e7ca JR |
2575 | struct ltt_session *session, |
2576 | enum lttng_domain_type domain, | |
a7a533cd | 2577 | struct lttng_tracker_ids **ids) |
a5dfbb9d | 2578 | { |
a7a533cd | 2579 | int ret = LTTNG_OK; |
a5dfbb9d MD |
2580 | |
2581 | switch (domain) { | |
2582 | case LTTNG_DOMAIN_KERNEL: | |
2583 | { | |
2584 | struct ltt_kernel_session *ksess; | |
2585 | ||
2586 | ksess = session->kernel_session; | |
a7a533cd JR |
2587 | ret = kernel_list_tracker_ids(tracker_type, ksess, ids); |
2588 | if (ret != LTTNG_OK) { | |
2589 | ret = -LTTNG_ERR_KERN_LIST_FAIL; | |
a5dfbb9d MD |
2590 | goto error; |
2591 | } | |
2592 | break; | |
2593 | } | |
2594 | case LTTNG_DOMAIN_UST: | |
2595 | { | |
2596 | struct ltt_ust_session *usess; | |
2597 | ||
2598 | usess = session->ust_session; | |
a7a533cd JR |
2599 | ret = trace_ust_list_tracker_ids(tracker_type, usess, ids); |
2600 | if (ret != LTTNG_OK) { | |
2601 | ret = -LTTNG_ERR_UST_LIST_FAIL; | |
a5dfbb9d MD |
2602 | goto error; |
2603 | } | |
2604 | break; | |
2605 | } | |
2606 | case LTTNG_DOMAIN_LOG4J: | |
2607 | case LTTNG_DOMAIN_JUL: | |
2608 | case LTTNG_DOMAIN_PYTHON: | |
2609 | default: | |
a7a533cd | 2610 | ret = -LTTNG_ERR_UND; |
a5dfbb9d MD |
2611 | goto error; |
2612 | } | |
2613 | ||
a5dfbb9d MD |
2614 | error: |
2615 | /* Return negative value to differentiate return code */ | |
a7a533cd | 2616 | return ret; |
a5dfbb9d MD |
2617 | } |
2618 | ||
2f77fc4b DG |
2619 | /* |
2620 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2621 | * |
2622 | * Called with session mutex held. | |
2f77fc4b DG |
2623 | */ |
2624 | int cmd_start_trace(struct ltt_session *session) | |
2625 | { | |
82b69413 | 2626 | enum lttng_error_code ret; |
cde3e505 | 2627 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2628 | struct ltt_kernel_session *ksession; |
2629 | struct ltt_ust_session *usess; | |
1f496244 JG |
2630 | const bool session_rotated_after_last_stop = |
2631 | session->rotated_after_last_stop; | |
b02f5986 MD |
2632 | const bool session_cleared_after_last_stop = |
2633 | session->cleared_after_last_stop; | |
2f77fc4b DG |
2634 | |
2635 | assert(session); | |
2636 | ||
2637 | /* Ease our life a bit ;) */ | |
2638 | ksession = session->kernel_session; | |
2639 | usess = session->ust_session; | |
2640 | ||
8382cf6f DG |
2641 | /* Is the session already started? */ |
2642 | if (session->active) { | |
f73fabfd | 2643 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
7a24ece3 JR |
2644 | /* Perform nothing */ |
2645 | goto end; | |
2f77fc4b DG |
2646 | } |
2647 | ||
1f496244 JG |
2648 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING && |
2649 | !session->current_trace_chunk) { | |
2650 | /* | |
2651 | * A rotation was launched while the session was stopped and | |
2652 | * it has not been completed yet. It is not possible to start | |
2653 | * the session since starting the session here would require a | |
2654 | * rotation from "NULL" to a new trace chunk. That rotation | |
2655 | * would overlap with the ongoing rotation, which is not | |
2656 | * supported. | |
2657 | */ | |
2658 | WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing", | |
2659 | session->name); | |
2660 | ret = LTTNG_ERR_ROTATION_PENDING; | |
2661 | goto error; | |
2662 | } | |
2663 | ||
cde3e505 DG |
2664 | /* |
2665 | * Starting a session without channel is useless since after that it's not | |
2666 | * possible to enable channel thus inform the client. | |
2667 | */ | |
2668 | if (usess && usess->domain_global.channels) { | |
2669 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2670 | } | |
2671 | if (ksession) { | |
2672 | nb_chan += ksession->channel_count; | |
2673 | } | |
2674 | if (!nb_chan) { | |
2675 | ret = LTTNG_ERR_NO_CHANNEL; | |
2676 | goto error; | |
2677 | } | |
2678 | ||
1f496244 JG |
2679 | session->active = 1; |
2680 | session->rotated_after_last_stop = false; | |
b02f5986 | 2681 | session->cleared_after_last_stop = false; |
070b6a86 | 2682 | if (session->output_traces && !session->current_trace_chunk) { |
1f496244 JG |
2683 | if (!session->has_been_started) { |
2684 | struct lttng_trace_chunk *trace_chunk; | |
2685 | ||
2686 | DBG("Creating initial trace chunk of session \"%s\"", | |
2687 | session->name); | |
2688 | trace_chunk = session_create_new_trace_chunk( | |
2689 | session, NULL, NULL, NULL); | |
2690 | if (!trace_chunk) { | |
2691 | ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
2692 | goto error; | |
2693 | } | |
2694 | assert(!session->current_trace_chunk); | |
2695 | ret = session_set_trace_chunk(session, trace_chunk, | |
2696 | NULL); | |
2697 | lttng_trace_chunk_put(trace_chunk); | |
2698 | if (ret) { | |
2699 | ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
2700 | goto error; | |
2701 | } | |
2702 | } else { | |
2703 | DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk", | |
2704 | session->name); | |
2705 | /* | |
2706 | * Rotate existing streams into the new chunk. | |
2707 | * This is a "quiet" rotation has no client has | |
2708 | * explicitly requested this operation. | |
2709 | * | |
2710 | * There is also no need to wait for the rotation | |
2711 | * to complete as it will happen immediately. No data | |
2712 | * was produced as the session was stopped, so the | |
2713 | * rotation should happen on reception of the command. | |
2714 | */ | |
343defc2 MD |
2715 | ret = cmd_rotate_session(session, NULL, true, |
2716 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
1f496244 JG |
2717 | if (ret != LTTNG_OK) { |
2718 | goto error; | |
2719 | } | |
5c408ad8 | 2720 | } |
c996624c JD |
2721 | } |
2722 | ||
2f77fc4b DG |
2723 | /* Kernel tracing */ |
2724 | if (ksession != NULL) { | |
c996624c | 2725 | DBG("Start kernel tracing session %s", session->name); |
7d268848 | 2726 | ret = start_kernel_session(ksession); |
9b6c7ec5 | 2727 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2728 | goto error; |
2729 | } | |
2f77fc4b DG |
2730 | } |
2731 | ||
2732 | /* Flag session that trace should start automatically */ | |
2733 | if (usess) { | |
82b69413 JG |
2734 | int int_ret = ust_app_start_trace_all(usess); |
2735 | ||
2736 | if (int_ret < 0) { | |
f73fabfd | 2737 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2738 | goto error; |
2739 | } | |
2740 | } | |
2741 | ||
5c408ad8 JD |
2742 | /* |
2743 | * Clear the flag that indicates that a rotation was done while the | |
2744 | * session was stopped. | |
2745 | */ | |
2746 | session->rotated_after_last_stop = false; | |
2747 | ||
259c2674 | 2748 | if (session->rotate_timer_period) { |
82b69413 JG |
2749 | int int_ret = timer_session_rotation_schedule_timer_start( |
2750 | session, session->rotate_timer_period); | |
2751 | ||
2752 | if (int_ret < 0) { | |
259c2674 JD |
2753 | ERR("Failed to enable rotate timer"); |
2754 | ret = LTTNG_ERR_UNK; | |
2755 | goto error; | |
2756 | } | |
2757 | } | |
2758 | ||
f73fabfd | 2759 | ret = LTTNG_OK; |
2f77fc4b DG |
2760 | |
2761 | error: | |
1f496244 JG |
2762 | if (ret == LTTNG_OK) { |
2763 | /* Flag this after a successful start. */ | |
2764 | session->has_been_started |= 1; | |
2765 | } else { | |
2766 | session->active = 0; | |
2767 | /* Restore initial state on error. */ | |
2768 | session->rotated_after_last_stop = | |
2769 | session_rotated_after_last_stop; | |
b02f5986 MD |
2770 | session->cleared_after_last_stop = |
2771 | session_cleared_after_last_stop; | |
1f496244 | 2772 | } |
7a24ece3 | 2773 | end: |
2f77fc4b DG |
2774 | return ret; |
2775 | } | |
2776 | ||
2777 | /* | |
2778 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2779 | */ | |
2780 | int cmd_stop_trace(struct ltt_session *session) | |
2781 | { | |
2782 | int ret; | |
2f77fc4b DG |
2783 | struct ltt_kernel_session *ksession; |
2784 | struct ltt_ust_session *usess; | |
2785 | ||
2786 | assert(session); | |
2787 | ||
4dbe1875 | 2788 | DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
2f77fc4b DG |
2789 | /* Short cut */ |
2790 | ksession = session->kernel_session; | |
2791 | usess = session->ust_session; | |
2792 | ||
8382cf6f DG |
2793 | /* Session is not active. Skip everythong and inform the client. */ |
2794 | if (!session->active) { | |
f73fabfd | 2795 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2796 | goto error; |
2797 | } | |
2798 | ||
4dbe1875 MD |
2799 | ret = stop_kernel_session(ksession); |
2800 | if (ret != LTTNG_OK) { | |
2801 | goto error; | |
2f77fc4b DG |
2802 | } |
2803 | ||
14fb1ebe | 2804 | if (usess && usess->active) { |
2f77fc4b DG |
2805 | ret = ust_app_stop_trace_all(usess); |
2806 | if (ret < 0) { | |
f73fabfd | 2807 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2808 | goto error; |
2809 | } | |
2810 | } | |
2811 | ||
4dbe1875 MD |
2812 | DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name, |
2813 | session->id); | |
8382cf6f DG |
2814 | /* Flag inactive after a successful stop. */ |
2815 | session->active = 0; | |
4dbe1875 | 2816 | ret = LTTNG_OK; |
2f77fc4b DG |
2817 | |
2818 | error: | |
2819 | return ret; | |
2820 | } | |
2821 | ||
2822 | /* | |
433f5ba9 JR |
2823 | * Set the base_path of the session only if subdir of a control uris is set. |
2824 | * Return LTTNG_OK on success, otherwise LTTNG_ERR_*. | |
2f77fc4b | 2825 | */ |
433f5ba9 JR |
2826 | static int set_session_base_path_from_uris(struct ltt_session *session, |
2827 | size_t nb_uri, | |
bda32d56 | 2828 | struct lttng_uri *uris) |
2f77fc4b | 2829 | { |
433f5ba9 JR |
2830 | int ret; |
2831 | size_t i; | |
2f77fc4b | 2832 | |
e3876bf0 JR |
2833 | for (i = 0; i < nb_uri; i++) { |
2834 | if (uris[i].stype != LTTNG_STREAM_CONTROL || | |
2835 | uris[i].subdir[0] == '\0') { | |
2836 | /* Not interested in these URIs */ | |
2837 | continue; | |
2838 | } | |
2839 | ||
2840 | if (session->base_path != NULL) { | |
2841 | free(session->base_path); | |
2842 | session->base_path = NULL; | |
2843 | } | |
2844 | ||
2845 | /* Set session base_path */ | |
2846 | session->base_path = strdup(uris[i].subdir); | |
2847 | if (!session->base_path) { | |
433f5ba9 JR |
2848 | PERROR("Failed to copy base path \"%s\" to session \"%s\"", |
2849 | uris[i].subdir, session->name); | |
2850 | ret = LTTNG_ERR_NOMEM; | |
e3876bf0 JR |
2851 | goto error; |
2852 | } | |
433f5ba9 JR |
2853 | DBG2("Setting base path \"%s\" for session \"%s\"", |
2854 | session->base_path, session->name); | |
2855 | } | |
2856 | ret = LTTNG_OK; | |
2857 | error: | |
2858 | return ret; | |
2859 | } | |
2860 | ||
2861 | /* | |
2862 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2863 | */ | |
2864 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, | |
2865 | struct lttng_uri *uris) | |
2866 | { | |
2867 | int ret, i; | |
2868 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2869 | struct ltt_ust_session *usess = session->ust_session; | |
2870 | ||
2871 | assert(session); | |
2872 | assert(uris); | |
2873 | assert(nb_uri > 0); | |
2874 | ||
2875 | /* Can't set consumer URI if the session is active. */ | |
2876 | if (session->active) { | |
2877 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2878 | goto error; | |
2879 | } | |
2880 | ||
2881 | /* | |
2882 | * Set the session base path if any. This is done inside | |
2883 | * cmd_set_consumer_uri to preserve backward compatibility of the | |
2884 | * previous session creation api vs the session descriptor api. | |
2885 | */ | |
2886 | ret = set_session_base_path_from_uris(session, nb_uri, uris); | |
2887 | if (ret != LTTNG_OK) { | |
2888 | goto error; | |
e3876bf0 JR |
2889 | } |
2890 | ||
bda32d56 | 2891 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2892 | for (i = 0; i < nb_uri; i++) { |
e3876bf0 JR |
2893 | ret = add_uri_to_consumer(session, session->consumer, &uris[i], |
2894 | LTTNG_DOMAIN_NONE); | |
a74934ba | 2895 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2896 | goto error; |
2897 | } | |
2f77fc4b DG |
2898 | } |
2899 | ||
bda32d56 JG |
2900 | /* Set UST session URIs */ |
2901 | if (session->ust_session) { | |
2902 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2903 | ret = add_uri_to_consumer(session, |
bda32d56 | 2904 | session->ust_session->consumer, |
b178f53e | 2905 | &uris[i], LTTNG_DOMAIN_UST); |
bda32d56 JG |
2906 | if (ret != LTTNG_OK) { |
2907 | goto error; | |
2908 | } | |
2909 | } | |
2910 | } | |
2911 | ||
2912 | /* Set kernel session URIs */ | |
2913 | if (session->kernel_session) { | |
2914 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2915 | ret = add_uri_to_consumer(session, |
bda32d56 | 2916 | session->kernel_session->consumer, |
b178f53e | 2917 | &uris[i], LTTNG_DOMAIN_KERNEL); |
bda32d56 JG |
2918 | if (ret != LTTNG_OK) { |
2919 | goto error; | |
2920 | } | |
2921 | } | |
2922 | } | |
2923 | ||
7ab70fe0 DG |
2924 | /* |
2925 | * Make sure to set the session in output mode after we set URI since a | |
2926 | * session can be created without URL (thus flagged in no output mode). | |
2927 | */ | |
2928 | session->output_traces = 1; | |
2929 | if (ksess) { | |
2930 | ksess->output_traces = 1; | |
bda32d56 JG |
2931 | } |
2932 | ||
2933 | if (usess) { | |
7ab70fe0 DG |
2934 | usess->output_traces = 1; |
2935 | } | |
2936 | ||
2f77fc4b | 2937 | /* All good! */ |
f73fabfd | 2938 | ret = LTTNG_OK; |
2f77fc4b DG |
2939 | |
2940 | error: | |
2941 | return ret; | |
2942 | } | |
2943 | ||
b178f53e JG |
2944 | static |
2945 | enum lttng_error_code set_session_output_from_descriptor( | |
2946 | struct ltt_session *session, | |
2947 | const struct lttng_session_descriptor *descriptor) | |
2f77fc4b DG |
2948 | { |
2949 | int ret; | |
b178f53e JG |
2950 | enum lttng_error_code ret_code = LTTNG_OK; |
2951 | enum lttng_session_descriptor_type session_type = | |
2952 | lttng_session_descriptor_get_type(descriptor); | |
2953 | enum lttng_session_descriptor_output_type output_type = | |
2954 | lttng_session_descriptor_get_output_type(descriptor); | |
2955 | struct lttng_uri uris[2] = {}; | |
2956 | size_t uri_count = 0; | |
2957 | ||
2958 | switch (output_type) { | |
2959 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: | |
2960 | goto end; | |
2961 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: | |
2962 | lttng_session_descriptor_get_local_output_uri(descriptor, | |
2963 | &uris[0]); | |
2964 | uri_count = 1; | |
2965 | break; | |
2966 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: | |
2967 | lttng_session_descriptor_get_network_output_uris(descriptor, | |
2968 | &uris[0], &uris[1]); | |
2969 | uri_count = 2; | |
2970 | break; | |
2971 | default: | |
2972 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 2973 | goto end; |
2f77fc4b DG |
2974 | } |
2975 | ||
b178f53e JG |
2976 | switch (session_type) { |
2977 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
2978 | { | |
2979 | struct snapshot_output *new_output = NULL; | |
2980 | ||
2981 | new_output = snapshot_output_alloc(); | |
2982 | if (!new_output) { | |
2983 | ret_code = LTTNG_ERR_NOMEM; | |
2984 | goto end; | |
2985 | } | |
2986 | ||
2987 | ret = snapshot_output_init_with_uri(session, | |
2988 | DEFAULT_SNAPSHOT_MAX_SIZE, | |
2989 | NULL, uris, uri_count, session->consumer, | |
2990 | new_output, &session->snapshot); | |
2991 | if (ret < 0) { | |
2992 | ret_code = (ret == -ENOMEM) ? | |
2993 | LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID; | |
2994 | snapshot_output_destroy(new_output); | |
2995 | goto end; | |
2996 | } | |
2997 | snapshot_add_output(&session->snapshot, new_output); | |
2998 | break; | |
2999 | } | |
3000 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: | |
3001 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3002 | { | |
3003 | ret_code = cmd_set_consumer_uri(session, uri_count, uris); | |
3004 | break; | |
3005 | } | |
3006 | default: | |
3007 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3008 | goto end; |
2f77fc4b | 3009 | } |
b178f53e JG |
3010 | end: |
3011 | return ret_code; | |
3012 | } | |
3013 | ||
3014 | static | |
3015 | enum lttng_error_code cmd_create_session_from_descriptor( | |
3016 | struct lttng_session_descriptor *descriptor, | |
3017 | const lttng_sock_cred *creds, | |
3018 | const char *home_path) | |
3019 | { | |
3020 | int ret; | |
3021 | enum lttng_error_code ret_code; | |
3022 | const char *session_name; | |
3023 | struct ltt_session *new_session = NULL; | |
3024 | enum lttng_session_descriptor_status descriptor_status; | |
2f77fc4b | 3025 | |
e32d7f27 | 3026 | session_lock_list(); |
b178f53e JG |
3027 | if (home_path) { |
3028 | if (*home_path != '/') { | |
3029 | ERR("Home path provided by client is not absolute"); | |
3030 | ret_code = LTTNG_ERR_INVALID; | |
3031 | goto end; | |
3032 | } | |
3033 | } | |
2f77fc4b | 3034 | |
b178f53e JG |
3035 | descriptor_status = lttng_session_descriptor_get_session_name( |
3036 | descriptor, &session_name); | |
3037 | switch (descriptor_status) { | |
3038 | case LTTNG_SESSION_DESCRIPTOR_STATUS_OK: | |
3039 | break; | |
3040 | case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET: | |
3041 | session_name = NULL; | |
3042 | break; | |
3043 | default: | |
3044 | ret_code = LTTNG_ERR_INVALID; | |
3045 | goto end; | |
3046 | } | |
e3876bf0 | 3047 | |
b178f53e | 3048 | ret_code = session_create(session_name, creds->uid, creds->gid, |
e3876bf0 | 3049 | &new_session); |
b178f53e | 3050 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3051 | goto end; |
2f77fc4b DG |
3052 | } |
3053 | ||
b178f53e JG |
3054 | if (!session_name) { |
3055 | ret = lttng_session_descriptor_set_session_name(descriptor, | |
3056 | new_session->name); | |
3057 | if (ret) { | |
3058 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3059 | goto end; | |
3060 | } | |
3061 | } | |
3062 | ||
3063 | if (!lttng_session_descriptor_is_output_destination_initialized( | |
3064 | descriptor)) { | |
3065 | /* | |
3066 | * Only include the session's creation time in the output | |
3067 | * destination if the name of the session itself was | |
3068 | * not auto-generated. | |
3069 | */ | |
3070 | ret_code = lttng_session_descriptor_set_default_output( | |
3071 | descriptor, | |
3072 | session_name ? &new_session->creation_time : NULL, | |
3073 | home_path); | |
3074 | if (ret_code != LTTNG_OK) { | |
e32d7f27 | 3075 | goto end; |
2bba9e53 | 3076 | } |
2bba9e53 | 3077 | } else { |
b178f53e JG |
3078 | new_session->has_user_specified_directory = |
3079 | lttng_session_descriptor_has_output_directory( | |
3080 | descriptor); | |
2f77fc4b DG |
3081 | } |
3082 | ||
b178f53e JG |
3083 | switch (lttng_session_descriptor_get_type(descriptor)) { |
3084 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3085 | new_session->snapshot_mode = 1; | |
3086 | break; | |
3087 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3088 | new_session->live_timer = | |
3089 | lttng_session_descriptor_live_get_timer_interval( | |
3090 | descriptor); | |
3091 | break; | |
3092 | default: | |
3093 | break; | |
3094 | } | |
2f77fc4b | 3095 | |
b178f53e JG |
3096 | ret_code = set_session_output_from_descriptor(new_session, descriptor); |
3097 | if (ret_code != LTTNG_OK) { | |
3098 | goto end; | |
3099 | } | |
3100 | new_session->consumer->enabled = 1; | |
3101 | ret_code = LTTNG_OK; | |
e32d7f27 | 3102 | end: |
b178f53e JG |
3103 | /* Release reference provided by the session_create function. */ |
3104 | session_put(new_session); | |
3105 | if (ret_code != LTTNG_OK && new_session) { | |
3106 | /* Release the global reference on error. */ | |
3107 | session_destroy(new_session); | |
e32d7f27 | 3108 | } |
b178f53e JG |
3109 | session_unlock_list(); |
3110 | return ret_code; | |
2f77fc4b DG |
3111 | } |
3112 | ||
b178f53e JG |
3113 | enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock, |
3114 | struct lttng_session_descriptor **return_descriptor) | |
27babd3a DG |
3115 | { |
3116 | int ret; | |
b178f53e JG |
3117 | size_t payload_size; |
3118 | struct lttng_dynamic_buffer payload; | |
3119 | struct lttng_buffer_view home_dir_view; | |
3120 | struct lttng_buffer_view session_descriptor_view; | |
3121 | struct lttng_session_descriptor *session_descriptor = NULL; | |
3122 | enum lttng_error_code ret_code; | |
3123 | ||
3124 | lttng_dynamic_buffer_init(&payload); | |
3125 | if (cmd_ctx->lsm->u.create_session.home_dir_size >= | |
3126 | LTTNG_PATH_MAX) { | |
3127 | ret_code = LTTNG_ERR_INVALID; | |
3128 | goto error; | |
27babd3a | 3129 | } |
b178f53e JG |
3130 | if (cmd_ctx->lsm->u.create_session.session_descriptor_size > |
3131 | LTTNG_SESSION_DESCRIPTOR_MAX_LEN) { | |
3132 | ret_code = LTTNG_ERR_INVALID; | |
3133 | goto error; | |
27babd3a DG |
3134 | } |
3135 | ||
b178f53e JG |
3136 | payload_size = cmd_ctx->lsm->u.create_session.home_dir_size + |
3137 | cmd_ctx->lsm->u.create_session.session_descriptor_size; | |
3138 | ret = lttng_dynamic_buffer_set_size(&payload, payload_size); | |
3139 | if (ret) { | |
3140 | ret_code = LTTNG_ERR_NOMEM; | |
3141 | goto error; | |
27babd3a DG |
3142 | } |
3143 | ||
b178f53e JG |
3144 | ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size); |
3145 | if (ret <= 0) { | |
3146 | ERR("Reception of session descriptor failed, aborting."); | |
3147 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3148 | goto error; | |
27babd3a DG |
3149 | } |
3150 | ||
b178f53e JG |
3151 | home_dir_view = lttng_buffer_view_from_dynamic_buffer( |
3152 | &payload, | |
3153 | 0, | |
3154 | cmd_ctx->lsm->u.create_session.home_dir_size); | |
3155 | session_descriptor_view = lttng_buffer_view_from_dynamic_buffer( | |
3156 | &payload, | |
3157 | cmd_ctx->lsm->u.create_session.home_dir_size, | |
3158 | cmd_ctx->lsm->u.create_session.session_descriptor_size); | |
27babd3a | 3159 | |
b178f53e JG |
3160 | ret = lttng_session_descriptor_create_from_buffer( |
3161 | &session_descriptor_view, &session_descriptor); | |
3162 | if (ret < 0) { | |
3163 | ERR("Failed to create session descriptor from payload of \"create session\" command"); | |
3164 | ret_code = LTTNG_ERR_INVALID; | |
3165 | goto error; | |
3166 | } | |
27babd3a | 3167 | |
b178f53e JG |
3168 | /* |
3169 | * Sets the descriptor's auto-generated properties (name, output) if | |
3170 | * needed. | |
3171 | */ | |
3172 | ret_code = cmd_create_session_from_descriptor(session_descriptor, | |
3173 | &cmd_ctx->creds, | |
3174 | home_dir_view.size ? home_dir_view.data : NULL); | |
3175 | if (ret_code != LTTNG_OK) { | |
3176 | goto error; | |
e32d7f27 | 3177 | } |
b178f53e JG |
3178 | |
3179 | ret_code = LTTNG_OK; | |
3180 | *return_descriptor = session_descriptor; | |
3181 | session_descriptor = NULL; | |
3182 | error: | |
3183 | lttng_dynamic_buffer_reset(&payload); | |
3184 | lttng_session_descriptor_destroy(session_descriptor); | |
3185 | return ret_code; | |
27babd3a DG |
3186 | } |
3187 | ||
3e3665b8 JG |
3188 | static |
3189 | void cmd_destroy_session_reply(const struct ltt_session *session, | |
3190 | void *_reply_context) | |
3191 | { | |
3192 | int ret; | |
3193 | ssize_t comm_ret; | |
3194 | const struct cmd_destroy_session_reply_context *reply_context = | |
3195 | _reply_context; | |
3196 | struct lttng_dynamic_buffer payload; | |
3197 | struct lttcomm_session_destroy_command_header cmd_header; | |
3198 | struct lttng_trace_archive_location *location = NULL; | |
3199 | struct lttcomm_lttng_msg llm = { | |
3200 | .cmd_type = LTTNG_DESTROY_SESSION, | |
3285a971 | 3201 | .ret_code = reply_context->destruction_status, |
3e3665b8 JG |
3202 | .pid = UINT32_MAX, |
3203 | .cmd_header_size = | |
3204 | sizeof(struct lttcomm_session_destroy_command_header), | |
3205 | .data_size = 0, | |
3206 | }; | |
3207 | size_t payload_size_before_location; | |
3208 | ||
3209 | lttng_dynamic_buffer_init(&payload); | |
3210 | ||
3211 | ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm)); | |
3212 | if (ret) { | |
3213 | ERR("Failed to append session destruction message"); | |
3214 | goto error; | |
3215 | } | |
3216 | ||
3217 | cmd_header.rotation_state = | |
3218 | (int32_t) (reply_context->implicit_rotation_on_destroy ? | |
3219 | session->rotation_state : | |
3220 | LTTNG_ROTATION_STATE_NO_ROTATION); | |
3221 | ret = lttng_dynamic_buffer_append(&payload, &cmd_header, | |
3222 | sizeof(cmd_header)); | |
3223 | if (ret) { | |
3224 | ERR("Failed to append session destruction command header"); | |
3225 | goto error; | |
3226 | } | |
3227 | ||
3228 | if (!reply_context->implicit_rotation_on_destroy) { | |
3229 | DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply", | |
3230 | session->name); | |
3231 | goto send_reply; | |
3232 | } | |
3233 | if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) { | |
3234 | DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply", | |
3235 | session->name); | |
3236 | goto send_reply; | |
3237 | } | |
3238 | ||
3239 | location = session_get_trace_archive_location(session); | |
3240 | if (!location) { | |
3241 | ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"", | |
3242 | session->name); | |
3243 | goto error; | |
3244 | } | |
3245 | ||
3246 | payload_size_before_location = payload.size; | |
3247 | comm_ret = lttng_trace_archive_location_serialize(location, | |
3248 | &payload); | |
3249 | if (comm_ret < 0) { | |
3250 | ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"", | |
3251 | session->name); | |
3252 | goto error; | |
3253 | } | |
3254 | /* Update the message to indicate the location's length. */ | |
3255 | ((struct lttcomm_lttng_msg *) payload.data)->data_size = | |
3256 | payload.size - payload_size_before_location; | |
3257 | send_reply: | |
3258 | comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd, | |
3259 | payload.data, payload.size); | |
3260 | if (comm_ret != (ssize_t) payload.size) { | |
3261 | ERR("Failed to send result of the destruction of session \"%s\" to client", | |
3262 | session->name); | |
3263 | } | |
3264 | error: | |
3265 | ret = close(reply_context->reply_sock_fd); | |
3266 | if (ret) { | |
3267 | PERROR("Failed to close client socket in deferred session destroy reply"); | |
3268 | } | |
3269 | lttng_dynamic_buffer_reset(&payload); | |
3270 | free(_reply_context); | |
3271 | } | |
3272 | ||
2f77fc4b DG |
3273 | /* |
3274 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
3275 | * |
3276 | * Called with session lock held. | |
2f77fc4b | 3277 | */ |
e32d7f27 | 3278 | int cmd_destroy_session(struct ltt_session *session, |
3e3665b8 JG |
3279 | struct notification_thread_handle *notification_thread_handle, |
3280 | int *sock_fd) | |
2f77fc4b DG |
3281 | { |
3282 | int ret; | |
3285a971 | 3283 | enum lttng_error_code destruction_last_error = LTTNG_OK; |
3e3665b8 JG |
3284 | struct cmd_destroy_session_reply_context *reply_context = NULL; |
3285 | ||
3286 | if (sock_fd) { | |
3287 | reply_context = zmalloc(sizeof(*reply_context)); | |
3288 | if (!reply_context) { | |
3289 | ret = LTTNG_ERR_NOMEM; | |
3290 | goto end; | |
3291 | } | |
3292 | reply_context->reply_sock_fd = *sock_fd; | |
3293 | } | |
2f77fc4b DG |
3294 | |
3295 | /* Safety net */ | |
3296 | assert(session); | |
3297 | ||
3e3665b8 JG |
3298 | DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, |
3299 | session->id); | |
3300 | if (session->active) { | |
3301 | DBG("Session \"%s\" is active, attempting to stop it before destroying it", | |
3302 | session->name); | |
3303 | ret = cmd_stop_trace(session); | |
3304 | if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
3305 | /* Carry on with the destruction of the session. */ | |
3306 | ERR("Failed to stop session \"%s\" as part of its destruction: %s", | |
3307 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3308 | destruction_last_error = ret; |
3e3665b8 JG |
3309 | } |
3310 | } | |
5c408ad8 | 3311 | |
92816cc3 JG |
3312 | if (session->rotation_schedule_timer_enabled) { |
3313 | if (timer_session_rotation_schedule_timer_stop( | |
3314 | session)) { | |
3315 | ERR("Failed to stop the \"rotation schedule\" timer of session %s", | |
3316 | session->name); | |
3285a971 | 3317 | destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR; |
92816cc3 | 3318 | } |
259c2674 JD |
3319 | } |
3320 | ||
90936dcf JD |
3321 | if (session->rotate_size) { |
3322 | unsubscribe_session_consumed_size_rotation(session, notification_thread_handle); | |
3323 | session->rotate_size = 0; | |
3324 | } | |
3325 | ||
a7ceb342 | 3326 | if (session->rotated && session->current_trace_chunk && session->output_traces) { |
b5893d8e JG |
3327 | /* |
3328 | * Perform a last rotation on destruction if rotations have | |
3329 | * occurred during the session's lifetime. | |
3330 | */ | |
343defc2 MD |
3331 | ret = cmd_rotate_session(session, NULL, false, |
3332 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
d2956687 JG |
3333 | if (ret != LTTNG_OK) { |
3334 | ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s", | |
3335 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3336 | destruction_last_error = -ret; |
124473a3 | 3337 | } |
3e3665b8 JG |
3338 | if (reply_context) { |
3339 | reply_context->implicit_rotation_on_destroy = true; | |
3340 | } | |
070b6a86 | 3341 | } else if (session->has_been_started && session->current_trace_chunk) { |
7fdbed1c JG |
3342 | /* |
3343 | * The user has not triggered a session rotation. However, to | |
3344 | * ensure all data has been consumed, the session is rotated | |
3345 | * to a 'null' trace chunk before it is destroyed. | |
3346 | * | |
3347 | * This is a "quiet" rotation meaning that no notification is | |
3348 | * emitted and no renaming of the current trace chunk takes | |
3349 | * place. | |
3350 | */ | |
343defc2 MD |
3351 | ret = cmd_rotate_session(session, NULL, true, |
3352 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
7fdbed1c JG |
3353 | if (ret != LTTNG_OK) { |
3354 | ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s", | |
3355 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3356 | destruction_last_error = -ret; |
7fdbed1c JG |
3357 | } |
3358 | } | |
5c408ad8 | 3359 | |
a503e1ef JG |
3360 | if (session->shm_path[0]) { |
3361 | /* | |
3362 | * When a session is created with an explicit shm_path, | |
3363 | * the consumer daemon will create its shared memory files | |
3364 | * at that location and will *not* unlink them. This is normal | |
3365 | * as the intention of that feature is to make it possible | |
3366 | * to retrieve the content of those files should a crash occur. | |
3367 | * | |
3368 | * To ensure the content of those files can be used, the | |
3369 | * sessiond daemon will replicate the content of the metadata | |
3370 | * cache in a metadata file. | |
3371 | * | |
3372 | * On clean-up, it is expected that the consumer daemon will | |
3373 | * unlink the shared memory files and that the session daemon | |
3374 | * will unlink the metadata file. Then, the session's directory | |
3375 | * in the shm path can be removed. | |
3376 | * | |
3377 | * Unfortunately, a flaw in the design of the sessiond's and | |
3378 | * consumerd's tear down of channels makes it impossible to | |
3379 | * determine when the sessiond _and_ the consumerd have both | |
3380 | * destroyed their representation of a channel. For one, the | |
3381 | * unlinking, close, and rmdir happen in deferred 'call_rcu' | |
3382 | * callbacks in both daemons. | |
3383 | * | |
3384 | * However, it is also impossible for the sessiond to know when | |
3385 | * the consumer daemon is done destroying its channel(s) since | |
3386 | * it occurs as a reaction to the closing of the channel's file | |
3387 | * descriptor. There is no resulting communication initiated | |
3388 | * from the consumerd to the sessiond to confirm that the | |
3389 | * operation is completed (and was successful). | |
3390 | * | |
3391 | * Until this is all fixed, the session daemon checks for the | |
3392 | * removal of the session's shm path which makes it possible | |
3393 | * to safely advertise a session as having been destroyed. | |
3394 | * | |
3395 | * Prior to this fix, it was not possible to reliably save | |
3396 | * a session making use of the --shm-path option, destroy it, | |
3397 | * and load it again. This is because the creation of the | |
3398 | * session would fail upon seeing the session's shm path | |
3399 | * already in existence. | |
3400 | * | |
3401 | * Note that none of the error paths in the check for the | |
3402 | * directory's existence return an error. This is normal | |
3403 | * as there isn't much that can be done. The session will | |
3404 | * be destroyed properly, except that we can't offer the | |
3405 | * guarantee that the same session can be re-created. | |
3406 | */ | |
3407 | current_completion_handler = &destroy_completion_handler.handler; | |
3408 | ret = lttng_strncpy(destroy_completion_handler.shm_path, | |
3409 | session->shm_path, | |
3410 | sizeof(destroy_completion_handler.shm_path)); | |
3411 | assert(!ret); | |
3412 | } | |
e32d7f27 JG |
3413 | |
3414 | /* | |
3415 | * The session is destroyed. However, note that the command context | |
3416 | * still holds a reference to the session, thus delaying its destruction | |
3417 | * _at least_ up to the point when that reference is released. | |
3418 | */ | |
3419 | session_destroy(session); | |
3e3665b8 | 3420 | if (reply_context) { |
3285a971 | 3421 | reply_context->destruction_status = destruction_last_error; |
3e3665b8 JG |
3422 | ret = session_add_destroy_notifier(session, |
3423 | cmd_destroy_session_reply, | |
3424 | (void *) reply_context); | |
3425 | if (ret) { | |
3426 | ret = LTTNG_ERR_FATAL; | |
3427 | goto end; | |
3428 | } else { | |
3429 | *sock_fd = -1; | |
3430 | } | |
3431 | } | |
3432 | ret = LTTNG_OK; | |
3433 | end: | |
2f77fc4b DG |
3434 | return ret; |
3435 | } | |
3436 | ||
2f77fc4b DG |
3437 | /* |
3438 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3439 | */ | |
56a37563 JG |
3440 | int cmd_register_consumer(struct ltt_session *session, |
3441 | enum lttng_domain_type domain, const char *sock_path, | |
3442 | struct consumer_data *cdata) | |
2f77fc4b DG |
3443 | { |
3444 | int ret, sock; | |
dd81b457 | 3445 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
3446 | |
3447 | assert(session); | |
3448 | assert(cdata); | |
3449 | assert(sock_path); | |
3450 | ||
3451 | switch (domain) { | |
3452 | case LTTNG_DOMAIN_KERNEL: | |
3453 | { | |
3454 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3455 | ||
3456 | assert(ksess); | |
3457 | ||
3458 | /* Can't register a consumer if there is already one */ | |
3459 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 3460 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
3461 | goto error; |
3462 | } | |
3463 | ||
3464 | sock = lttcomm_connect_unix_sock(sock_path); | |
3465 | if (sock < 0) { | |
f73fabfd | 3466 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
3467 | goto error; |
3468 | } | |
4ce514c4 | 3469 | cdata->cmd_sock = sock; |
2f77fc4b | 3470 | |
4ce514c4 | 3471 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 3472 | if (socket == NULL) { |
f66c074c DG |
3473 | ret = close(sock); |
3474 | if (ret < 0) { | |
3475 | PERROR("close register consumer"); | |
3476 | } | |
4ce514c4 | 3477 | cdata->cmd_sock = -1; |
f73fabfd | 3478 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3479 | goto error; |
3480 | } | |
3481 | ||
3482 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
3483 | if (socket->lock == NULL) { | |
3484 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 3485 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3486 | goto error; |
3487 | } | |
3488 | pthread_mutex_init(socket->lock, NULL); | |
3489 | socket->registered = 1; | |
3490 | ||
3491 | rcu_read_lock(); | |
3492 | consumer_add_socket(socket, ksess->consumer); | |
3493 | rcu_read_unlock(); | |
3494 | ||
3495 | pthread_mutex_lock(&cdata->pid_mutex); | |
3496 | cdata->pid = -1; | |
3497 | pthread_mutex_unlock(&cdata->pid_mutex); | |
3498 | ||
3499 | break; | |
3500 | } | |
3501 | default: | |
3502 | /* TODO: Userspace tracing */ | |
f73fabfd | 3503 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3504 | goto error; |
3505 | } | |
3506 | ||
dd81b457 | 3507 | return LTTNG_OK; |
2f77fc4b DG |
3508 | |
3509 | error: | |
dd81b457 DG |
3510 | if (socket) { |
3511 | consumer_destroy_socket(socket); | |
3512 | } | |
2f77fc4b DG |
3513 | return ret; |
3514 | } | |
3515 | ||
3516 | /* | |
3517 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3518 | */ | |
3519 | ssize_t cmd_list_domains(struct ltt_session *session, | |
3520 | struct lttng_domain **domains) | |
3521 | { | |
3522 | int ret, index = 0; | |
3523 | ssize_t nb_dom = 0; | |
fefd409b DG |
3524 | struct agent *agt; |
3525 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
3526 | |
3527 | if (session->kernel_session != NULL) { | |
3528 | DBG3("Listing domains found kernel domain"); | |
3529 | nb_dom++; | |
3530 | } | |
3531 | ||
3532 | if (session->ust_session != NULL) { | |
3533 | DBG3("Listing domains found UST global domain"); | |
3534 | nb_dom++; | |
3c6a091f | 3535 | |
e0a74f01 | 3536 | rcu_read_lock(); |
fefd409b DG |
3537 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3538 | agt, node.node) { | |
3539 | if (agt->being_used) { | |
3540 | nb_dom++; | |
3541 | } | |
3c6a091f | 3542 | } |
e0a74f01 | 3543 | rcu_read_unlock(); |
2f77fc4b DG |
3544 | } |
3545 | ||
fa64dfb4 JG |
3546 | if (!nb_dom) { |
3547 | goto end; | |
3548 | } | |
3549 | ||
2f77fc4b DG |
3550 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
3551 | if (*domains == NULL) { | |
f73fabfd | 3552 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3553 | goto error; |
3554 | } | |
3555 | ||
3556 | if (session->kernel_session != NULL) { | |
3557 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
b5edb9e8 PP |
3558 | |
3559 | /* Kernel session buffer type is always GLOBAL */ | |
3560 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
3561 | ||
2f77fc4b DG |
3562 | index++; |
3563 | } | |
3564 | ||
3565 | if (session->ust_session != NULL) { | |
3566 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 3567 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 3568 | index++; |
3c6a091f | 3569 | |
e0a74f01 | 3570 | rcu_read_lock(); |
fefd409b DG |
3571 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3572 | agt, node.node) { | |
3573 | if (agt->being_used) { | |
3574 | (*domains)[index].type = agt->domain; | |
3575 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
3576 | index++; | |
3577 | } | |
3c6a091f | 3578 | } |
e0a74f01 | 3579 | rcu_read_unlock(); |
2f77fc4b | 3580 | } |
fa64dfb4 | 3581 | end: |
2f77fc4b DG |
3582 | return nb_dom; |
3583 | ||
3584 | error: | |
f73fabfd DG |
3585 | /* Return negative value to differentiate return code */ |
3586 | return -ret; | |
2f77fc4b DG |
3587 | } |
3588 | ||
3589 | ||
3590 | /* | |
3591 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3592 | */ | |
56a37563 JG |
3593 | ssize_t cmd_list_channels(enum lttng_domain_type domain, |
3594 | struct ltt_session *session, struct lttng_channel **channels) | |
2f77fc4b | 3595 | { |
53e367f9 | 3596 | ssize_t nb_chan = 0, payload_size = 0, ret; |
2f77fc4b DG |
3597 | |
3598 | switch (domain) { | |
3599 | case LTTNG_DOMAIN_KERNEL: | |
3600 | if (session->kernel_session != NULL) { | |
3601 | nb_chan = session->kernel_session->channel_count; | |
3602 | } | |
3603 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 | 3604 | if (nb_chan <= 0) { |
53e367f9 JG |
3605 | ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
3606 | goto end; | |
c7d620a2 | 3607 | } |
2f77fc4b DG |
3608 | break; |
3609 | case LTTNG_DOMAIN_UST: | |
3610 | if (session->ust_session != NULL) { | |
7ffc31a2 | 3611 | rcu_read_lock(); |
2f77fc4b | 3612 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
3613 | session->ust_session->domain_global.channels); |
3614 | rcu_read_unlock(); | |
2f77fc4b DG |
3615 | } |
3616 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 3617 | if (nb_chan < 0) { |
53e367f9 JG |
3618 | ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND; |
3619 | goto end; | |
c7d620a2 | 3620 | } |
2f77fc4b DG |
3621 | break; |
3622 | default: | |
53e367f9 JG |
3623 | ret = -LTTNG_ERR_UND; |
3624 | goto end; | |
2f77fc4b DG |
3625 | } |
3626 | ||
3627 | if (nb_chan > 0) { | |
53e367f9 | 3628 | const size_t channel_size = sizeof(struct lttng_channel) + |
cf0bcb51 JG |
3629 | sizeof(struct lttng_channel_extended); |
3630 | struct lttng_channel_extended *channel_exts; | |
53e367f9 JG |
3631 | |
3632 | payload_size = nb_chan * channel_size; | |
3633 | *channels = zmalloc(payload_size); | |
2f77fc4b | 3634 | if (*channels == NULL) { |
53e367f9 JG |
3635 | ret = -LTTNG_ERR_FATAL; |
3636 | goto end; | |
2f77fc4b DG |
3637 | } |
3638 | ||
53e367f9 JG |
3639 | channel_exts = ((void *) *channels) + |
3640 | (nb_chan * sizeof(struct lttng_channel)); | |
d449df4a MD |
3641 | ret = list_lttng_channels(domain, session, *channels, channel_exts); |
3642 | if (ret != LTTNG_OK) { | |
3643 | free(*channels); | |
3644 | *channels = NULL; | |
3645 | goto end; | |
3646 | } | |
53e367f9 JG |
3647 | } else { |
3648 | *channels = NULL; | |
2f77fc4b DG |
3649 | } |
3650 | ||
53e367f9 JG |
3651 | ret = payload_size; |
3652 | end: | |
3653 | return ret; | |
2f77fc4b DG |
3654 | } |
3655 | ||
3656 | /* | |
3657 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3658 | */ | |
56a37563 JG |
3659 | ssize_t cmd_list_events(enum lttng_domain_type domain, |
3660 | struct ltt_session *session, char *channel_name, | |
b4e3ceb9 | 3661 | struct lttng_event **events, size_t *total_size) |
2f77fc4b DG |
3662 | { |
3663 | int ret = 0; | |
3664 | ssize_t nb_event = 0; | |
3665 | ||
3666 | switch (domain) { | |
3667 | case LTTNG_DOMAIN_KERNEL: | |
3668 | if (session->kernel_session != NULL) { | |
3669 | nb_event = list_lttng_kernel_events(channel_name, | |
b4e3ceb9 PP |
3670 | session->kernel_session, events, |
3671 | total_size); | |
2f77fc4b DG |
3672 | } |
3673 | break; | |
3674 | case LTTNG_DOMAIN_UST: | |
3675 | { | |
3676 | if (session->ust_session != NULL) { | |
3677 | nb_event = list_lttng_ust_global_events(channel_name, | |
b4e3ceb9 PP |
3678 | &session->ust_session->domain_global, events, |
3679 | total_size); | |
2f77fc4b DG |
3680 | } |
3681 | break; | |
3682 | } | |
5cdb6027 | 3683 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3684 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3685 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3686 | if (session->ust_session) { |
fefd409b DG |
3687 | struct lttng_ht_iter iter; |
3688 | struct agent *agt; | |
3689 | ||
b11feea5 | 3690 | rcu_read_lock(); |
fefd409b DG |
3691 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
3692 | &iter.iter, agt, node.node) { | |
1dfd9906 JG |
3693 | if (agt->domain == domain) { |
3694 | nb_event = list_lttng_agent_events( | |
b4e3ceb9 PP |
3695 | agt, events, |
3696 | total_size); | |
1dfd9906 JG |
3697 | break; |
3698 | } | |
fefd409b | 3699 | } |
b11feea5 | 3700 | rcu_read_unlock(); |
3c6a091f DG |
3701 | } |
3702 | break; | |
2f77fc4b | 3703 | default: |
f73fabfd | 3704 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3705 | goto error; |
3706 | } | |
3707 | ||
f73fabfd | 3708 | return nb_event; |
2f77fc4b DG |
3709 | |
3710 | error: | |
f73fabfd DG |
3711 | /* Return negative value to differentiate return code */ |
3712 | return -ret; | |
2f77fc4b DG |
3713 | } |
3714 | ||
3715 | /* | |
3716 | * Using the session list, filled a lttng_session array to send back to the | |
3717 | * client for session listing. | |
3718 | * | |
3719 | * The session list lock MUST be acquired before calling this function. Use | |
3720 | * session_lock_list() and session_unlock_list(). | |
3721 | */ | |
b178f53e JG |
3722 | void cmd_list_lttng_sessions(struct lttng_session *sessions, |
3723 | size_t session_count, uid_t uid, gid_t gid) | |
2f77fc4b DG |
3724 | { |
3725 | int ret; | |
3726 | unsigned int i = 0; | |
3727 | struct ltt_session *session; | |
3728 | struct ltt_session_list *list = session_get_list(); | |
b178f53e JG |
3729 | struct lttng_session_extended *extended = |
3730 | (typeof(extended)) (&sessions[session_count]); | |
2f77fc4b DG |
3731 | |
3732 | DBG("Getting all available session for UID %d GID %d", | |
3733 | uid, gid); | |
3734 | /* | |
3735 | * Iterate over session list and append data after the control struct in | |
3736 | * the buffer. | |
3737 | */ | |
3738 | cds_list_for_each_entry(session, &list->head, list) { | |
e32d7f27 JG |
3739 | if (!session_get(session)) { |
3740 | continue; | |
3741 | } | |
2f77fc4b DG |
3742 | /* |
3743 | * Only list the sessions the user can control. | |
3744 | */ | |
e32d7f27 JG |
3745 | if (!session_access_ok(session, uid, gid) || |
3746 | session->destroyed) { | |
3747 | session_put(session); | |
2f77fc4b DG |
3748 | continue; |
3749 | } | |
3750 | ||
3751 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3752 | struct ltt_ust_session *usess = session->ust_session; | |
3753 | ||
3754 | if (session->consumer->type == CONSUMER_DST_NET || | |
3755 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
3756 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3757 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 3758 | sizeof(sessions[i].path), session); |
2f77fc4b | 3759 | } else { |
dec56f6c | 3760 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
366a9222 | 3761 | session->consumer->dst.session_root_path); |
2f77fc4b DG |
3762 | } |
3763 | if (ret < 0) { | |
3764 | PERROR("snprintf session path"); | |
e32d7f27 | 3765 | session_put(session); |
2f77fc4b DG |
3766 | continue; |
3767 | } | |
3768 | ||
3769 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
3770 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 3771 | sessions[i].enabled = session->active; |
2cbf8fed | 3772 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 3773 | sessions[i].live_timer_interval = session->live_timer; |
b178f53e JG |
3774 | extended[i].creation_time.value = (uint64_t) session->creation_time; |
3775 | extended[i].creation_time.is_set = 1; | |
2f77fc4b | 3776 | i++; |
e32d7f27 | 3777 | session_put(session); |
2f77fc4b DG |
3778 | } |
3779 | } | |
3780 | ||
806e2684 | 3781 | /* |
6d805429 | 3782 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 3783 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 3784 | */ |
6d805429 | 3785 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
3786 | { |
3787 | int ret; | |
3788 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3789 | struct ltt_ust_session *usess = session->ust_session; | |
3790 | ||
3791 | assert(session); | |
3792 | ||
5c408ad8 JD |
3793 | DBG("Data pending for session %s", session->name); |
3794 | ||
806e2684 | 3795 | /* Session MUST be stopped to ask for data availability. */ |
8382cf6f | 3796 | if (session->active) { |
806e2684 DG |
3797 | ret = LTTNG_ERR_SESSION_STARTED; |
3798 | goto error; | |
3a89d11a DG |
3799 | } else { |
3800 | /* | |
3801 | * If stopped, just make sure we've started before else the above call | |
3802 | * will always send that there is data pending. | |
3803 | * | |
3804 | * The consumer assumes that when the data pending command is received, | |
3805 | * the trace has been started before or else no output data is written | |
3806 | * by the streams which is a condition for data pending. So, this is | |
3807 | * *VERY* important that we don't ask the consumer before a start | |
3808 | * trace. | |
3809 | */ | |
8382cf6f | 3810 | if (!session->has_been_started) { |
3a89d11a DG |
3811 | ret = 0; |
3812 | goto error; | |
3813 | } | |
806e2684 DG |
3814 | } |
3815 | ||
92816cc3 JG |
3816 | /* A rotation is still pending, we have to wait. */ |
3817 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { | |
5c408ad8 JD |
3818 | DBG("Rotate still pending for session %s", session->name); |
3819 | ret = 1; | |
3820 | goto error; | |
3821 | } | |
3822 | ||
806e2684 | 3823 | if (ksess && ksess->consumer) { |
6d805429 DG |
3824 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
3825 | if (ret == 1) { | |
806e2684 DG |
3826 | /* Data is still being extracted for the kernel. */ |
3827 | goto error; | |
3828 | } | |
3829 | } | |
3830 | ||
3831 | if (usess && usess->consumer) { | |
6d805429 DG |
3832 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
3833 | if (ret == 1) { | |
806e2684 DG |
3834 | /* Data is still being extracted for the kernel. */ |
3835 | goto error; | |
3836 | } | |
3837 | } | |
3838 | ||
3839 | /* Data is ready to be read by a viewer */ | |
6d805429 | 3840 | ret = 0; |
806e2684 DG |
3841 | |
3842 | error: | |
3843 | return ret; | |
3844 | } | |
3845 | ||
6dc3064a DG |
3846 | /* |
3847 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
3848 | * | |
3849 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3850 | */ | |
3851 | int cmd_snapshot_add_output(struct ltt_session *session, | |
df4f5a87 | 3852 | const struct lttng_snapshot_output *output, uint32_t *id) |
6dc3064a DG |
3853 | { |
3854 | int ret; | |
3855 | struct snapshot_output *new_output; | |
3856 | ||
3857 | assert(session); | |
3858 | assert(output); | |
3859 | ||
3860 | DBG("Cmd snapshot add output for session %s", session->name); | |
3861 | ||
3862 | /* | |
903ef685 | 3863 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
3864 | */ |
3865 | if (session->output_traces) { | |
903ef685 | 3866 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3867 | goto error; |
3868 | } | |
3869 | ||
54213acc JG |
3870 | if (session->has_non_mmap_channel) { |
3871 | ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED; | |
3872 | goto error; | |
3873 | } | |
3874 | ||
6dc3064a DG |
3875 | /* Only one output is allowed until we have the "tee" feature. */ |
3876 | if (session->snapshot.nb_output == 1) { | |
3877 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
3878 | goto error; | |
3879 | } | |
3880 | ||
3881 | new_output = snapshot_output_alloc(); | |
3882 | if (!new_output) { | |
3883 | ret = LTTNG_ERR_NOMEM; | |
3884 | goto error; | |
3885 | } | |
3886 | ||
b178f53e | 3887 | ret = snapshot_output_init(session, output->max_size, output->name, |
6dc3064a DG |
3888 | output->ctrl_url, output->data_url, session->consumer, new_output, |
3889 | &session->snapshot); | |
3890 | if (ret < 0) { | |
3891 | if (ret == -ENOMEM) { | |
3892 | ret = LTTNG_ERR_NOMEM; | |
3893 | } else { | |
3894 | ret = LTTNG_ERR_INVALID; | |
3895 | } | |
3896 | goto free_error; | |
3897 | } | |
3898 | ||
6dc3064a DG |
3899 | rcu_read_lock(); |
3900 | snapshot_add_output(&session->snapshot, new_output); | |
3901 | if (id) { | |
3902 | *id = new_output->id; | |
3903 | } | |
3904 | rcu_read_unlock(); | |
3905 | ||
3906 | return LTTNG_OK; | |
3907 | ||
3908 | free_error: | |
3909 | snapshot_output_destroy(new_output); | |
3910 | error: | |
3911 | return ret; | |
3912 | } | |
3913 | ||
3914 | /* | |
3915 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
3916 | * | |
3917 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3918 | */ | |
3919 | int cmd_snapshot_del_output(struct ltt_session *session, | |
df4f5a87 | 3920 | const struct lttng_snapshot_output *output) |
6dc3064a DG |
3921 | { |
3922 | int ret; | |
eb240553 | 3923 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
3924 | |
3925 | assert(session); | |
3926 | assert(output); | |
3927 | ||
6dc3064a DG |
3928 | rcu_read_lock(); |
3929 | ||
3930 | /* | |
d3f14b8a MD |
3931 | * Permission denied to create an output if the session is not |
3932 | * set in no output mode. | |
6dc3064a DG |
3933 | */ |
3934 | if (session->output_traces) { | |
903ef685 | 3935 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3936 | goto error; |
3937 | } | |
3938 | ||
eb240553 DG |
3939 | if (output->id) { |
3940 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
3941 | session->name); | |
3942 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
3943 | } else if (*output->name != '\0') { | |
3944 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
3945 | session->name); | |
3946 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
3947 | } | |
6dc3064a DG |
3948 | if (!sout) { |
3949 | ret = LTTNG_ERR_INVALID; | |
3950 | goto error; | |
3951 | } | |
3952 | ||
3953 | snapshot_delete_output(&session->snapshot, sout); | |
3954 | snapshot_output_destroy(sout); | |
3955 | ret = LTTNG_OK; | |
3956 | ||
3957 | error: | |
3958 | rcu_read_unlock(); | |
3959 | return ret; | |
3960 | } | |
3961 | ||
3962 | /* | |
3963 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
3964 | * | |
3965 | * If no output is available, outputs is untouched and 0 is returned. | |
3966 | * | |
3967 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
3968 | */ | |
3969 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
3970 | struct lttng_snapshot_output **outputs) | |
3971 | { | |
3972 | int ret, idx = 0; | |
b223ca94 | 3973 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
3974 | struct lttng_ht_iter iter; |
3975 | struct snapshot_output *output; | |
3976 | ||
3977 | assert(session); | |
3978 | assert(outputs); | |
3979 | ||
3980 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
3981 | ||
3982 | /* | |
d3f14b8a MD |
3983 | * Permission denied to create an output if the session is not |
3984 | * set in no output mode. | |
6dc3064a DG |
3985 | */ |
3986 | if (session->output_traces) { | |
903ef685 JG |
3987 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
3988 | goto end; | |
6dc3064a DG |
3989 | } |
3990 | ||
3991 | if (session->snapshot.nb_output == 0) { | |
3992 | ret = 0; | |
903ef685 | 3993 | goto end; |
6dc3064a DG |
3994 | } |
3995 | ||
3996 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
3997 | if (!list) { | |
b223ca94 | 3998 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 3999 | goto end; |
6dc3064a DG |
4000 | } |
4001 | ||
4002 | /* Copy list from session to the new list object. */ | |
b223ca94 | 4003 | rcu_read_lock(); |
6dc3064a DG |
4004 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
4005 | output, node.node) { | |
4006 | assert(output->consumer); | |
4007 | list[idx].id = output->id; | |
4008 | list[idx].max_size = output->max_size; | |
6ce22875 MD |
4009 | if (lttng_strncpy(list[idx].name, output->name, |
4010 | sizeof(list[idx].name))) { | |
4011 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4012 | goto error; |
6ce22875 | 4013 | } |
6dc3064a | 4014 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
6ce22875 | 4015 | if (lttng_strncpy(list[idx].ctrl_url, |
366a9222 | 4016 | output->consumer->dst.session_root_path, |
6ce22875 MD |
4017 | sizeof(list[idx].ctrl_url))) { |
4018 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4019 | goto error; |
6ce22875 | 4020 | } |
6dc3064a DG |
4021 | } else { |
4022 | /* Control URI. */ | |
4023 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
4024 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
4025 | if (ret < 0) { | |
b223ca94 | 4026 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4027 | goto error; |
6dc3064a DG |
4028 | } |
4029 | ||
4030 | /* Data URI. */ | |
4031 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
4032 | list[idx].data_url, sizeof(list[idx].data_url)); | |
4033 | if (ret < 0) { | |
b223ca94 | 4034 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4035 | goto error; |
6dc3064a DG |
4036 | } |
4037 | } | |
4038 | idx++; | |
4039 | } | |
4040 | ||
4041 | *outputs = list; | |
b223ca94 JG |
4042 | list = NULL; |
4043 | ret = session->snapshot.nb_output; | |
6dc3064a | 4044 | error: |
903ef685 | 4045 | rcu_read_unlock(); |
b223ca94 | 4046 | free(list); |
903ef685 | 4047 | end: |
b223ca94 | 4048 | return ret; |
6dc3064a DG |
4049 | } |
4050 | ||
93ec662e JD |
4051 | /* |
4052 | * Check if we can regenerate the metadata for this session. | |
4053 | * Only kernel, UST per-uid and non-live sessions are supported. | |
4054 | * | |
4055 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
4056 | */ | |
4057 | static | |
eded6438 | 4058 | int check_regenerate_metadata_support(struct ltt_session *session) |
93ec662e JD |
4059 | { |
4060 | int ret; | |
4061 | ||
4062 | assert(session); | |
4063 | ||
4064 | if (session->live_timer != 0) { | |
4065 | ret = LTTNG_ERR_LIVE_SESSION; | |
4066 | goto end; | |
4067 | } | |
4068 | if (!session->active) { | |
4069 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4070 | goto end; | |
4071 | } | |
4072 | if (session->ust_session) { | |
4073 | switch (session->ust_session->buffer_type) { | |
4074 | case LTTNG_BUFFER_PER_UID: | |
4075 | break; | |
4076 | case LTTNG_BUFFER_PER_PID: | |
4077 | ret = LTTNG_ERR_PER_PID_SESSION; | |
4078 | goto end; | |
4079 | default: | |
4080 | assert(0); | |
4081 | ret = LTTNG_ERR_UNK; | |
4082 | goto end; | |
4083 | } | |
4084 | } | |
4085 | if (session->consumer->type == CONSUMER_DST_NET && | |
4086 | session->consumer->relay_minor_version < 8) { | |
4087 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; | |
4088 | goto end; | |
4089 | } | |
4090 | ret = 0; | |
4091 | ||
4092 | end: | |
4093 | return ret; | |
4094 | } | |
4095 | ||
7802bae3 LL |
4096 | static |
4097 | int clear_metadata_file(int fd) | |
4098 | { | |
4099 | int ret; | |
a5df8828 | 4100 | off_t lseek_ret; |
7802bae3 | 4101 | |
a5df8828 GL |
4102 | lseek_ret = lseek(fd, 0, SEEK_SET); |
4103 | if (lseek_ret < 0) { | |
7802bae3 | 4104 | PERROR("lseek"); |
a5df8828 | 4105 | ret = -1; |
7802bae3 LL |
4106 | goto end; |
4107 | } | |
4108 | ||
4109 | ret = ftruncate(fd, 0); | |
4110 | if (ret < 0) { | |
4111 | PERROR("ftruncate"); | |
4112 | goto end; | |
4113 | } | |
4114 | ||
4115 | end: | |
4116 | return ret; | |
4117 | } | |
4118 | ||
93ec662e | 4119 | static |
eded6438 | 4120 | int ust_regenerate_metadata(struct ltt_ust_session *usess) |
93ec662e JD |
4121 | { |
4122 | int ret = 0; | |
4123 | struct buffer_reg_uid *uid_reg = NULL; | |
4124 | struct buffer_reg_session *session_reg = NULL; | |
4125 | ||
4126 | rcu_read_lock(); | |
4127 | cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { | |
4128 | struct ust_registry_session *registry; | |
4129 | struct ust_registry_channel *chan; | |
4130 | struct lttng_ht_iter iter_chan; | |
4131 | ||
4132 | session_reg = uid_reg->registry; | |
4133 | registry = session_reg->reg.ust; | |
4134 | ||
4135 | pthread_mutex_lock(®istry->lock); | |
4136 | registry->metadata_len_sent = 0; | |
4137 | memset(registry->metadata, 0, registry->metadata_alloc_len); | |
4138 | registry->metadata_len = 0; | |
4139 | registry->metadata_version++; | |
7802bae3 LL |
4140 | if (registry->metadata_fd > 0) { |
4141 | /* Clear the metadata file's content. */ | |
4142 | ret = clear_metadata_file(registry->metadata_fd); | |
4143 | if (ret) { | |
4144 | pthread_mutex_unlock(®istry->lock); | |
4145 | goto end; | |
4146 | } | |
4147 | } | |
4148 | ||
93ec662e JD |
4149 | ret = ust_metadata_session_statedump(registry, NULL, |
4150 | registry->major, registry->minor); | |
4151 | if (ret) { | |
4152 | pthread_mutex_unlock(®istry->lock); | |
4153 | ERR("Failed to generate session metadata (err = %d)", | |
4154 | ret); | |
4155 | goto end; | |
4156 | } | |
4157 | cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, | |
4158 | chan, node.node) { | |
4159 | struct ust_registry_event *event; | |
4160 | struct lttng_ht_iter iter_event; | |
4161 | ||
4162 | ret = ust_metadata_channel_statedump(registry, chan); | |
4163 | if (ret) { | |
4164 | pthread_mutex_unlock(®istry->lock); | |
4165 | ERR("Failed to generate channel metadata " | |
4166 | "(err = %d)", ret); | |
4167 | goto end; | |
4168 | } | |
4169 | cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, | |
4170 | event, node.node) { | |
4171 | ret = ust_metadata_event_statedump(registry, | |
4172 | chan, event); | |
4173 | if (ret) { | |
4174 | pthread_mutex_unlock(®istry->lock); | |
4175 | ERR("Failed to generate event metadata " | |
4176 | "(err = %d)", ret); | |
4177 | goto end; | |
4178 | } | |
4179 | } | |
4180 | } | |
4181 | pthread_mutex_unlock(®istry->lock); | |
4182 | } | |
4183 | ||
4184 | end: | |
4185 | rcu_read_unlock(); | |
4186 | return ret; | |
4187 | } | |
4188 | ||
4189 | /* | |
eded6438 | 4190 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
4191 | * |
4192 | * Ask the consumer to truncate the existing metadata file(s) and | |
4193 | * then regenerate the metadata. Live and per-pid sessions are not | |
4194 | * supported and return an error. | |
4195 | * | |
4196 | * Return 0 on success or else a LTTNG_ERR code. | |
4197 | */ | |
eded6438 | 4198 | int cmd_regenerate_metadata(struct ltt_session *session) |
93ec662e JD |
4199 | { |
4200 | int ret; | |
4201 | ||
4202 | assert(session); | |
4203 | ||
eded6438 | 4204 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
4205 | if (ret) { |
4206 | goto end; | |
4207 | } | |
4208 | ||
4209 | if (session->kernel_session) { | |
eded6438 | 4210 | ret = kernctl_session_regenerate_metadata( |
93ec662e JD |
4211 | session->kernel_session->fd); |
4212 | if (ret < 0) { | |
4213 | ERR("Failed to regenerate the kernel metadata"); | |
4214 | goto end; | |
4215 | } | |
4216 | } | |
4217 | ||
4218 | if (session->ust_session) { | |
eded6438 | 4219 | ret = ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
4220 | if (ret < 0) { |
4221 | ERR("Failed to regenerate the UST metadata"); | |
4222 | goto end; | |
4223 | } | |
4224 | } | |
4225 | DBG("Cmd metadata regenerate for session %s", session->name); | |
4226 | ret = LTTNG_OK; | |
4227 | ||
4228 | end: | |
4229 | return ret; | |
4230 | } | |
4231 | ||
c2561365 JD |
4232 | /* |
4233 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
4234 | * | |
4235 | * Ask the tracer to regenerate a new statedump. | |
4236 | * | |
4237 | * Return 0 on success or else a LTTNG_ERR code. | |
4238 | */ | |
4239 | int cmd_regenerate_statedump(struct ltt_session *session) | |
4240 | { | |
4241 | int ret; | |
4242 | ||
4243 | assert(session); | |
4244 | ||
4245 | if (!session->active) { | |
4246 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4247 | goto end; | |
4248 | } | |
c2561365 JD |
4249 | |
4250 | if (session->kernel_session) { | |
4251 | ret = kernctl_session_regenerate_statedump( | |
4252 | session->kernel_session->fd); | |
4253 | /* | |
4254 | * Currently, the statedump in kernel can only fail if out | |
4255 | * of memory. | |
4256 | */ | |
4257 | if (ret < 0) { | |
4258 | if (ret == -ENOMEM) { | |
4259 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
4260 | } else { | |
4261 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4262 | } | |
4263 | ERR("Failed to regenerate the kernel statedump"); | |
4264 | goto end; | |
4265 | } | |
4266 | } | |
4267 | ||
4268 | if (session->ust_session) { | |
4269 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
4270 | /* | |
4271 | * Currently, the statedump in UST always returns 0. | |
4272 | */ | |
4273 | if (ret < 0) { | |
4274 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4275 | ERR("Failed to regenerate the UST statedump"); | |
4276 | goto end; | |
4277 | } | |
4278 | } | |
4279 | DBG("Cmd regenerate statedump for session %s", session->name); | |
4280 | ret = LTTNG_OK; | |
4281 | ||
4282 | end: | |
4283 | return ret; | |
4284 | } | |
4285 | ||
b0880ae5 JG |
4286 | int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock, |
4287 | struct notification_thread_handle *notification_thread) | |
4288 | { | |
4289 | int ret; | |
4290 | size_t trigger_len; | |
4291 | ssize_t sock_recv_len; | |
4292 | struct lttng_trigger *trigger = NULL; | |
4293 | struct lttng_buffer_view view; | |
4294 | struct lttng_dynamic_buffer trigger_buffer; | |
4295 | ||
4296 | lttng_dynamic_buffer_init(&trigger_buffer); | |
4297 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; | |
4298 | ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len); | |
4299 | if (ret) { | |
4300 | ret = LTTNG_ERR_NOMEM; | |
4301 | goto end; | |
4302 | } | |
4303 | ||
4304 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data, | |
4305 | trigger_len); | |
4306 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { | |
4307 | ERR("Failed to receive \"register trigger\" command payload"); | |
4308 | /* TODO: should this be a new error enum ? */ | |
4309 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4310 | goto end; | |
4311 | } | |
4312 | ||
4313 | view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1); | |
4314 | if (lttng_trigger_create_from_buffer(&view, &trigger) != | |
4315 | trigger_len) { | |
4316 | ERR("Invalid trigger payload received in \"register trigger\" command"); | |
4317 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4318 | goto end; | |
4319 | } | |
4320 | ||
4321 | ret = notification_thread_command_register_trigger(notification_thread, | |
4322 | trigger); | |
587f9fd0 JG |
4323 | /* Ownership of trigger was transferred. */ |
4324 | trigger = NULL; | |
b0880ae5 | 4325 | end: |
587f9fd0 | 4326 | lttng_trigger_destroy(trigger); |
b0880ae5 JG |
4327 | lttng_dynamic_buffer_reset(&trigger_buffer); |
4328 | return ret; | |
4329 | } | |
4330 | ||
4331 | int cmd_unregister_trigger(struct command_ctx *cmd_ctx, int sock, | |
4332 | struct notification_thread_handle *notification_thread) | |
4333 | { | |
4334 | int ret; | |
4335 | size_t trigger_len; | |
4336 | ssize_t sock_recv_len; | |
4337 | struct lttng_trigger *trigger = NULL; | |
4338 | struct lttng_buffer_view view; | |
4339 | struct lttng_dynamic_buffer trigger_buffer; | |
4340 | ||
4341 | lttng_dynamic_buffer_init(&trigger_buffer); | |
4342 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; | |
4343 | ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len); | |
4344 | if (ret) { | |
4345 | ret = LTTNG_ERR_NOMEM; | |
4346 | goto end; | |
4347 | } | |
4348 | ||
4349 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data, | |
4350 | trigger_len); | |
4351 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { | |
4352 | ERR("Failed to receive \"unregister trigger\" command payload"); | |
4353 | /* TODO: should this be a new error enum ? */ | |
4354 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4355 | goto end; | |
4356 | } | |
4357 | ||
4358 | view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1); | |
4359 | if (lttng_trigger_create_from_buffer(&view, &trigger) != | |
4360 | trigger_len) { | |
4361 | ERR("Invalid trigger payload received in \"unregister trigger\" command"); | |
4362 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4363 | goto end; | |
4364 | } | |
4365 | ||
4366 | ret = notification_thread_command_unregister_trigger(notification_thread, | |
4367 | trigger); | |
4368 | end: | |
587f9fd0 | 4369 | lttng_trigger_destroy(trigger); |
b0880ae5 JG |
4370 | lttng_dynamic_buffer_reset(&trigger_buffer); |
4371 | return ret; | |
4372 | } | |
4373 | ||
6dc3064a DG |
4374 | /* |
4375 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
4376 | * snapshot output is *not* set with a remote destination. | |
4377 | * | |
9a654598 | 4378 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4379 | */ |
9a654598 | 4380 | static enum lttng_error_code set_relayd_for_snapshot( |
348a81dc | 4381 | struct consumer_output *output, |
fb9a95c4 | 4382 | const struct ltt_session *session) |
6dc3064a | 4383 | { |
9a654598 | 4384 | enum lttng_error_code status = LTTNG_OK; |
6dc3064a DG |
4385 | struct lttng_ht_iter iter; |
4386 | struct consumer_socket *socket; | |
1e791a74 | 4387 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
6fa5fe7c | 4388 | const char *base_path; |
6dc3064a | 4389 | |
348a81dc | 4390 | assert(output); |
6dc3064a DG |
4391 | assert(session); |
4392 | ||
4393 | DBG2("Set relayd object from snapshot output"); | |
4394 | ||
1e791a74 | 4395 | if (session->current_trace_chunk) { |
348a81dc JG |
4396 | enum lttng_trace_chunk_status chunk_status = |
4397 | lttng_trace_chunk_get_id( | |
4398 | session->current_trace_chunk, | |
4399 | ¤t_chunk_id.value); | |
1e791a74 | 4400 | |
348a81dc | 4401 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) { |
1e791a74 JG |
4402 | current_chunk_id.is_set = true; |
4403 | } else { | |
4404 | ERR("Failed to get current trace chunk id"); | |
4405 | status = LTTNG_ERR_UNK; | |
4406 | goto error; | |
4407 | } | |
4408 | } | |
4409 | ||
6dc3064a | 4410 | /* Ignore if snapshot consumer output is not network. */ |
348a81dc | 4411 | if (output->type != CONSUMER_DST_NET) { |
6dc3064a DG |
4412 | goto error; |
4413 | } | |
4414 | ||
6fa5fe7c MD |
4415 | /* |
4416 | * The snapshot record URI base path overrides the session | |
4417 | * base path. | |
4418 | */ | |
4419 | if (output->dst.net.control.subdir[0] != '\0') { | |
4420 | base_path = output->dst.net.control.subdir; | |
4421 | } else { | |
4422 | base_path = session->base_path; | |
4423 | } | |
4424 | ||
6dc3064a DG |
4425 | /* |
4426 | * For each consumer socket, create and send the relayd object of the | |
4427 | * snapshot output. | |
4428 | */ | |
4429 | rcu_read_lock(); | |
348a81dc | 4430 | cds_lfht_for_each_entry(output->socks->ht, &iter.iter, |
5eecee74 | 4431 | socket, node.node) { |
ecd0f96d | 4432 | pthread_mutex_lock(socket->lock); |
9a654598 | 4433 | status = send_consumer_relayd_sockets(0, session->id, |
348a81dc | 4434 | output, socket, |
d3e2ba59 | 4435 | session->name, session->hostname, |
6fa5fe7c | 4436 | base_path, |
1e791a74 | 4437 | session->live_timer, |
db1da059 | 4438 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
4439 | session->creation_time, |
4440 | session->name_contains_creation_time); | |
ecd0f96d | 4441 | pthread_mutex_unlock(socket->lock); |
9a654598 | 4442 | if (status != LTTNG_OK) { |
6dc3064a DG |
4443 | rcu_read_unlock(); |
4444 | goto error; | |
4445 | } | |
4446 | } | |
4447 | rcu_read_unlock(); | |
4448 | ||
4449 | error: | |
9a654598 | 4450 | return status; |
6dc3064a DG |
4451 | } |
4452 | ||
4453 | /* | |
4454 | * Record a kernel snapshot. | |
4455 | * | |
fac41e72 | 4456 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4457 | */ |
fb9a95c4 JG |
4458 | static enum lttng_error_code record_kernel_snapshot( |
4459 | struct ltt_kernel_session *ksess, | |
348a81dc | 4460 | const struct consumer_output *output, |
fb9a95c4 | 4461 | const struct ltt_session *session, |
d07ceecd | 4462 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a | 4463 | { |
9a654598 | 4464 | enum lttng_error_code status; |
6dc3064a DG |
4465 | |
4466 | assert(ksess); | |
4467 | assert(output); | |
4468 | assert(session); | |
4469 | ||
348a81dc JG |
4470 | status = kernel_snapshot_record( |
4471 | ksess, output, wait, nb_packets_per_stream); | |
9a654598 | 4472 | return status; |
6dc3064a DG |
4473 | } |
4474 | ||
4475 | /* | |
4476 | * Record a UST snapshot. | |
4477 | * | |
9a654598 | 4478 | * Returns LTTNG_OK on success or a LTTNG_ERR error code. |
6dc3064a | 4479 | */ |
9a654598 | 4480 | static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess, |
348a81dc JG |
4481 | const struct consumer_output *output, |
4482 | const struct ltt_session *session, | |
4483 | int wait, uint64_t nb_packets_per_stream) | |
6dc3064a | 4484 | { |
9a654598 | 4485 | enum lttng_error_code status; |
6dc3064a DG |
4486 | |
4487 | assert(usess); | |
4488 | assert(output); | |
4489 | assert(session); | |
4490 | ||
348a81dc JG |
4491 | status = ust_app_snapshot_record( |
4492 | usess, output, wait, nb_packets_per_stream); | |
9a654598 | 4493 | return status; |
6dc3064a DG |
4494 | } |
4495 | ||
d07ceecd | 4496 | static |
fb9a95c4 JG |
4497 | uint64_t get_session_size_one_more_packet_per_stream( |
4498 | const struct ltt_session *session, uint64_t cur_nr_packets) | |
68808f4e | 4499 | { |
d07ceecd | 4500 | uint64_t tot_size = 0; |
68808f4e DG |
4501 | |
4502 | if (session->kernel_session) { | |
4503 | struct ltt_kernel_channel *chan; | |
fb9a95c4 JG |
4504 | const struct ltt_kernel_session *ksess = |
4505 | session->kernel_session; | |
68808f4e | 4506 | |
68808f4e | 4507 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
4508 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
4509 | /* | |
4510 | * Don't take channel into account if we | |
4511 | * already grab all its packets. | |
4512 | */ | |
4513 | continue; | |
68808f4e | 4514 | } |
d07ceecd MD |
4515 | tot_size += chan->channel->attr.subbuf_size |
4516 | * chan->stream_count; | |
68808f4e DG |
4517 | } |
4518 | } | |
4519 | ||
4520 | if (session->ust_session) { | |
fb9a95c4 | 4521 | const struct ltt_ust_session *usess = session->ust_session; |
68808f4e | 4522 | |
d07ceecd MD |
4523 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
4524 | cur_nr_packets); | |
68808f4e DG |
4525 | } |
4526 | ||
d07ceecd | 4527 | return tot_size; |
68808f4e DG |
4528 | } |
4529 | ||
5c786ded | 4530 | /* |
d07ceecd MD |
4531 | * Calculate the number of packets we can grab from each stream that |
4532 | * fits within the overall snapshot max size. | |
4533 | * | |
4534 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
4535 | * the number of packets per stream. | |
4536 | * | |
4537 | * TODO: this approach is not perfect: we consider the worse case | |
4538 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
4539 | * better if we do this calculation while we actually grab the packet | |
4540 | * content: we would know how much padding we don't actually store into | |
4541 | * the file. | |
4542 | * | |
4543 | * This algorithm is currently bounded by the number of packets per | |
4544 | * stream. | |
4545 | * | |
4546 | * Since we call this algorithm before actually grabbing the data, it's | |
4547 | * an approximation: for instance, applications could appear/disappear | |
4548 | * in between this call and actually grabbing data. | |
5c786ded | 4549 | */ |
d07ceecd | 4550 | static |
fb9a95c4 JG |
4551 | int64_t get_session_nb_packets_per_stream(const struct ltt_session *session, |
4552 | uint64_t max_size) | |
5c786ded | 4553 | { |
d07ceecd MD |
4554 | int64_t size_left; |
4555 | uint64_t cur_nb_packets = 0; | |
5c786ded | 4556 | |
d07ceecd MD |
4557 | if (!max_size) { |
4558 | return 0; /* Infinite */ | |
5c786ded JD |
4559 | } |
4560 | ||
d07ceecd MD |
4561 | size_left = max_size; |
4562 | for (;;) { | |
4563 | uint64_t one_more_packet_tot_size; | |
5c786ded | 4564 | |
fb9a95c4 JG |
4565 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream( |
4566 | session, cur_nb_packets); | |
d07ceecd MD |
4567 | if (!one_more_packet_tot_size) { |
4568 | /* We are already grabbing all packets. */ | |
4569 | break; | |
4570 | } | |
4571 | size_left -= one_more_packet_tot_size; | |
4572 | if (size_left < 0) { | |
4573 | break; | |
4574 | } | |
4575 | cur_nb_packets++; | |
5c786ded | 4576 | } |
aecf2da5 | 4577 | if (!cur_nb_packets && size_left != max_size) { |
d07ceecd MD |
4578 | /* Not enough room to grab one packet of each stream, error. */ |
4579 | return -1; | |
4580 | } | |
4581 | return cur_nb_packets; | |
5c786ded JD |
4582 | } |
4583 | ||
fb9a95c4 | 4584 | static |
d2956687 | 4585 | enum lttng_error_code snapshot_record(struct ltt_session *session, |
fb9a95c4 JG |
4586 | const struct snapshot_output *snapshot_output, int wait) |
4587 | { | |
4588 | int64_t nb_packets_per_stream; | |
d2956687 | 4589 | char snapshot_chunk_name[LTTNG_NAME_MAX]; |
348a81dc JG |
4590 | int ret; |
4591 | enum lttng_error_code ret_code = LTTNG_OK; | |
d2956687 | 4592 | struct lttng_trace_chunk *snapshot_trace_chunk; |
348a81dc JG |
4593 | struct consumer_output *original_ust_consumer_output = NULL; |
4594 | struct consumer_output *original_kernel_consumer_output = NULL; | |
4595 | struct consumer_output *snapshot_ust_consumer_output = NULL; | |
4596 | struct consumer_output *snapshot_kernel_consumer_output = NULL; | |
d2956687 | 4597 | |
348a81dc | 4598 | ret = snprintf(snapshot_chunk_name, sizeof(snapshot_chunk_name), |
d2956687 JG |
4599 | "%s-%s-%" PRIu64, |
4600 | snapshot_output->name, | |
4601 | snapshot_output->datetime, | |
4602 | snapshot_output->nb_snapshot); | |
348a81dc | 4603 | if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) { |
d2956687 | 4604 | ERR("Failed to format snapshot name"); |
348a81dc JG |
4605 | ret_code = LTTNG_ERR_INVALID; |
4606 | goto error; | |
d2956687 JG |
4607 | } |
4608 | DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"", | |
4609 | snapshot_output->name, session->name, | |
4610 | snapshot_chunk_name); | |
348a81dc JG |
4611 | if (!session->kernel_session && !session->ust_session) { |
4612 | ERR("Failed to record snapshot as no channels exist"); | |
4613 | ret_code = LTTNG_ERR_NO_CHANNEL; | |
4614 | goto error; | |
4615 | } | |
4616 | ||
4617 | if (session->kernel_session) { | |
4618 | original_kernel_consumer_output = | |
4619 | session->kernel_session->consumer; | |
4620 | snapshot_kernel_consumer_output = | |
4621 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4622 | strcpy(snapshot_kernel_consumer_output->chunk_path, |
4623 | snapshot_chunk_name); | |
348a81dc JG |
4624 | ret = consumer_copy_sockets(snapshot_kernel_consumer_output, |
4625 | original_kernel_consumer_output); | |
4626 | if (ret < 0) { | |
4627 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4628 | ret_code = LTTNG_ERR_NOMEM; | |
4629 | goto error; | |
4630 | } | |
4631 | ret_code = set_relayd_for_snapshot( | |
4632 | snapshot_kernel_consumer_output, session); | |
4633 | if (ret_code != LTTNG_OK) { | |
4634 | ERR("Failed to setup relay daemon for kernel tracer snapshot"); | |
4635 | goto error; | |
4636 | } | |
4637 | session->kernel_session->consumer = | |
4638 | snapshot_kernel_consumer_output; | |
4639 | } | |
4640 | if (session->ust_session) { | |
4641 | original_ust_consumer_output = session->ust_session->consumer; | |
4642 | snapshot_ust_consumer_output = | |
4643 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4644 | strcpy(snapshot_ust_consumer_output->chunk_path, |
4645 | snapshot_chunk_name); | |
348a81dc JG |
4646 | ret = consumer_copy_sockets(snapshot_ust_consumer_output, |
4647 | original_ust_consumer_output); | |
4648 | if (ret < 0) { | |
4649 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4650 | ret_code = LTTNG_ERR_NOMEM; | |
4651 | goto error; | |
4652 | } | |
4653 | ret_code = set_relayd_for_snapshot( | |
4654 | snapshot_ust_consumer_output, session); | |
4655 | if (ret_code != LTTNG_OK) { | |
4656 | ERR("Failed to setup relay daemon for userspace tracer snapshot"); | |
4657 | goto error; | |
4658 | } | |
4659 | session->ust_session->consumer = | |
4660 | snapshot_ust_consumer_output; | |
4661 | } | |
4662 | ||
d2956687 | 4663 | snapshot_trace_chunk = session_create_new_trace_chunk(session, |
348a81dc JG |
4664 | snapshot_kernel_consumer_output ?: |
4665 | snapshot_ust_consumer_output, | |
4666 | consumer_output_get_base_path( | |
4667 | snapshot_output->consumer), | |
d2956687 JG |
4668 | snapshot_chunk_name); |
4669 | if (!snapshot_trace_chunk) { | |
348a81dc JG |
4670 | ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"", |
4671 | session->name); | |
4672 | ret_code = LTTNG_ERR_CREATE_DIR_FAIL; | |
4673 | goto error; | |
d2956687 JG |
4674 | } |
4675 | assert(!session->current_trace_chunk); | |
4676 | ret = session_set_trace_chunk(session, snapshot_trace_chunk, NULL); | |
4677 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
4678 | snapshot_trace_chunk = NULL; | |
4679 | if (ret) { | |
348a81dc JG |
4680 | ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"", |
4681 | session->name); | |
4682 | ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
4683 | goto error; | |
d2956687 | 4684 | } |
fb9a95c4 JG |
4685 | |
4686 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
4687 | snapshot_output->max_size); | |
4688 | if (nb_packets_per_stream < 0) { | |
348a81dc | 4689 | ret_code = LTTNG_ERR_MAX_SIZE_INVALID; |
5151d412 | 4690 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4691 | } |
4692 | ||
4693 | if (session->kernel_session) { | |
348a81dc JG |
4694 | ret_code = record_kernel_snapshot(session->kernel_session, |
4695 | snapshot_kernel_consumer_output, session, | |
fb9a95c4 | 4696 | wait, nb_packets_per_stream); |
348a81dc | 4697 | if (ret_code != LTTNG_OK) { |
5151d412 | 4698 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4699 | } |
4700 | } | |
4701 | ||
4702 | if (session->ust_session) { | |
348a81dc JG |
4703 | ret_code = record_ust_snapshot(session->ust_session, |
4704 | snapshot_ust_consumer_output, session, | |
fb9a95c4 | 4705 | wait, nb_packets_per_stream); |
348a81dc | 4706 | if (ret_code != LTTNG_OK) { |
5151d412 | 4707 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4708 | } |
4709 | } | |
d2956687 | 4710 | |
5151d412 | 4711 | error_close_trace_chunk: |
dbfee52c MD |
4712 | if (session_set_trace_chunk(session, NULL, &snapshot_trace_chunk)) { |
4713 | ERR("Failed to release the current trace chunk of session \"%s\"", | |
4714 | session->name); | |
4715 | ret_code = LTTNG_ERR_UNK; | |
4716 | } | |
4717 | ||
4718 | if (session_close_trace_chunk(session, snapshot_trace_chunk, | |
343defc2 | 4719 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) { |
d2956687 JG |
4720 | /* |
4721 | * Don't goto end; make sure the chunk is closed for the session | |
4722 | * to allow future snapshots. | |
4723 | */ | |
4724 | ERR("Failed to close snapshot trace chunk of session \"%s\"", | |
4725 | session->name); | |
348a81dc | 4726 | ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; |
d2956687 | 4727 | } |
348a81dc JG |
4728 | error: |
4729 | if (original_ust_consumer_output) { | |
4730 | session->ust_session->consumer = original_ust_consumer_output; | |
4731 | } | |
4732 | if (original_kernel_consumer_output) { | |
4733 | session->kernel_session->consumer = | |
4734 | original_kernel_consumer_output; | |
4735 | } | |
4736 | consumer_output_put(snapshot_ust_consumer_output); | |
4737 | consumer_output_put(snapshot_kernel_consumer_output); | |
4738 | return ret_code; | |
fb9a95c4 JG |
4739 | } |
4740 | ||
6dc3064a DG |
4741 | /* |
4742 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
4743 | * | |
4744 | * The wait parameter is ignored so this call always wait for the snapshot to | |
4745 | * complete before returning. | |
4746 | * | |
4747 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4748 | */ | |
4749 | int cmd_snapshot_record(struct ltt_session *session, | |
df4f5a87 | 4750 | const struct lttng_snapshot_output *output, int wait) |
6dc3064a | 4751 | { |
9a654598 JG |
4752 | enum lttng_error_code cmd_ret = LTTNG_OK; |
4753 | int ret; | |
00e1dfc4 | 4754 | unsigned int snapshot_success = 0; |
10ba83fe | 4755 | char datetime[16]; |
2abe7969 | 4756 | struct snapshot_output *tmp_output = NULL; |
6dc3064a DG |
4757 | |
4758 | assert(session); | |
ba45d9f0 | 4759 | assert(output); |
6dc3064a DG |
4760 | |
4761 | DBG("Cmd snapshot record for session %s", session->name); | |
4762 | ||
10ba83fe JR |
4763 | /* Get the datetime for the snapshot output directory. */ |
4764 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
4765 | sizeof(datetime)); | |
4766 | if (!ret) { | |
9a654598 | 4767 | cmd_ret = LTTNG_ERR_INVALID; |
10ba83fe JR |
4768 | goto error; |
4769 | } | |
4770 | ||
6dc3064a | 4771 | /* |
d3f14b8a MD |
4772 | * Permission denied to create an output if the session is not |
4773 | * set in no output mode. | |
6dc3064a DG |
4774 | */ |
4775 | if (session->output_traces) { | |
9a654598 | 4776 | cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4777 | goto error; |
4778 | } | |
4779 | ||
4780 | /* The session needs to be started at least once. */ | |
8382cf6f | 4781 | if (!session->has_been_started) { |
9a654598 | 4782 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
6dc3064a DG |
4783 | goto error; |
4784 | } | |
4785 | ||
4786 | /* Use temporary output for the session. */ | |
ba45d9f0 | 4787 | if (*output->ctrl_url != '\0') { |
2abe7969 JG |
4788 | tmp_output = snapshot_output_alloc(); |
4789 | if (!tmp_output) { | |
4790 | cmd_ret = LTTNG_ERR_NOMEM; | |
4791 | goto error; | |
4792 | } | |
4793 | ||
b178f53e JG |
4794 | ret = snapshot_output_init(session, output->max_size, |
4795 | output->name, | |
4796 | output->ctrl_url, output->data_url, | |
4797 | session->consumer, | |
2abe7969 | 4798 | tmp_output, NULL); |
6dc3064a DG |
4799 | if (ret < 0) { |
4800 | if (ret == -ENOMEM) { | |
9a654598 | 4801 | cmd_ret = LTTNG_ERR_NOMEM; |
6dc3064a | 4802 | } else { |
9a654598 | 4803 | cmd_ret = LTTNG_ERR_INVALID; |
6dc3064a DG |
4804 | } |
4805 | goto error; | |
4806 | } | |
1bfe7328 | 4807 | /* Use the global session count for the temporary snapshot. */ |
2abe7969 | 4808 | tmp_output->nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe JR |
4809 | |
4810 | /* Use the global datetime */ | |
2abe7969 JG |
4811 | memcpy(tmp_output->datetime, datetime, sizeof(datetime)); |
4812 | cmd_ret = snapshot_record(session, tmp_output, wait); | |
fb9a95c4 | 4813 | if (cmd_ret != LTTNG_OK) { |
804c90a8 JR |
4814 | goto error; |
4815 | } | |
804c90a8 JR |
4816 | snapshot_success = 1; |
4817 | } else { | |
4818 | struct snapshot_output *sout; | |
4819 | struct lttng_ht_iter iter; | |
68808f4e | 4820 | |
804c90a8 JR |
4821 | rcu_read_lock(); |
4822 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
4823 | &iter.iter, sout, node.node) { | |
2abe7969 JG |
4824 | struct snapshot_output output_copy; |
4825 | ||
804c90a8 | 4826 | /* |
2abe7969 JG |
4827 | * Make a local copy of the output and override output |
4828 | * parameters with those provided as part of the | |
4829 | * command. | |
804c90a8 | 4830 | */ |
2abe7969 | 4831 | memcpy(&output_copy, sout, sizeof(output_copy)); |
1bfe7328 | 4832 | |
804c90a8 | 4833 | if (output->max_size != (uint64_t) -1ULL) { |
2abe7969 | 4834 | output_copy.max_size = output->max_size; |
6dc3064a | 4835 | } |
d07ceecd | 4836 | |
2abe7969 JG |
4837 | output_copy.nb_snapshot = session->snapshot.nb_snapshot; |
4838 | memcpy(output_copy.datetime, datetime, | |
4839 | sizeof(datetime)); | |
6dc3064a | 4840 | |
804c90a8 JR |
4841 | /* Use temporary name. */ |
4842 | if (*output->name != '\0') { | |
2abe7969 JG |
4843 | if (lttng_strncpy(output_copy.name, |
4844 | output->name, | |
4845 | sizeof(output_copy.name))) { | |
9a654598 | 4846 | cmd_ret = LTTNG_ERR_INVALID; |
cf3e357d MD |
4847 | rcu_read_unlock(); |
4848 | goto error; | |
4849 | } | |
804c90a8 | 4850 | } |
e1986656 | 4851 | |
2abe7969 | 4852 | cmd_ret = snapshot_record(session, &output_copy, wait); |
fb9a95c4 JG |
4853 | if (cmd_ret != LTTNG_OK) { |
4854 | rcu_read_unlock(); | |
4855 | goto error; | |
6dc3064a | 4856 | } |
804c90a8 | 4857 | snapshot_success = 1; |
6dc3064a | 4858 | } |
804c90a8 | 4859 | rcu_read_unlock(); |
6dc3064a DG |
4860 | } |
4861 | ||
1bfe7328 DG |
4862 | if (snapshot_success) { |
4863 | session->snapshot.nb_snapshot++; | |
b67578cb | 4864 | } else { |
9a654598 | 4865 | cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL; |
1bfe7328 DG |
4866 | } |
4867 | ||
6dc3064a | 4868 | error: |
2abe7969 JG |
4869 | if (tmp_output) { |
4870 | snapshot_output_destroy(tmp_output); | |
4871 | } | |
9a654598 | 4872 | return cmd_ret; |
6dc3064a DG |
4873 | } |
4874 | ||
d7ba1388 MD |
4875 | /* |
4876 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
4877 | */ | |
4878 | int cmd_set_session_shm_path(struct ltt_session *session, | |
4879 | const char *shm_path) | |
4880 | { | |
4881 | /* Safety net */ | |
4882 | assert(session); | |
4883 | ||
4884 | /* | |
4885 | * Can only set shm path before session is started. | |
4886 | */ | |
4887 | if (session->has_been_started) { | |
4888 | return LTTNG_ERR_SESSION_STARTED; | |
4889 | } | |
4890 | ||
4891 | strncpy(session->shm_path, shm_path, | |
4892 | sizeof(session->shm_path)); | |
4893 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
4894 | ||
4895 | return 0; | |
4896 | } | |
4897 | ||
5c408ad8 JD |
4898 | /* |
4899 | * Command LTTNG_ROTATE_SESSION from the lttng-ctl library. | |
4900 | * | |
4901 | * Ask the consumer to rotate the session output directory. | |
4902 | * The session lock must be held. | |
4903 | * | |
d5a1b7aa | 4904 | * Returns LTTNG_OK on success or else a negative LTTng error code. |
5c408ad8 JD |
4905 | */ |
4906 | int cmd_rotate_session(struct ltt_session *session, | |
7fdbed1c | 4907 | struct lttng_rotate_session_return *rotate_return, |
343defc2 MD |
4908 | bool quiet_rotation, |
4909 | enum lttng_trace_chunk_command_type command) | |
5c408ad8 JD |
4910 | { |
4911 | int ret; | |
d2956687 | 4912 | uint64_t ongoing_rotation_chunk_id; |
d5a1b7aa | 4913 | enum lttng_error_code cmd_ret = LTTNG_OK; |
d2956687 JG |
4914 | struct lttng_trace_chunk *chunk_being_archived = NULL; |
4915 | struct lttng_trace_chunk *new_trace_chunk = NULL; | |
4916 | enum lttng_trace_chunk_status chunk_status; | |
3156892b JG |
4917 | bool failed_to_rotate = false; |
4918 | enum lttng_error_code rotation_fail_code = LTTNG_OK; | |
5c408ad8 JD |
4919 | |
4920 | assert(session); | |
4921 | ||
4922 | if (!session->has_been_started) { | |
d5a1b7aa | 4923 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
d68c9a04 | 4924 | goto end; |
5c408ad8 JD |
4925 | } |
4926 | ||
d48d65e1 MD |
4927 | /* |
4928 | * Explicit rotation is not supported for live sessions. | |
4929 | * However, live sessions can perform a quiet rotation on | |
4930 | * destroy. | |
4931 | * Rotation is not supported for snapshot traces (no output). | |
4932 | */ | |
4933 | if ((!quiet_rotation && session->live_timer) || | |
4934 | !session->output_traces) { | |
d5a1b7aa | 4935 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
d68c9a04 | 4936 | goto end; |
5c408ad8 JD |
4937 | } |
4938 | ||
d2956687 | 4939 | /* Unsupported feature in lttng-relayd before 2.11. */ |
070b6a86 | 4940 | if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET && |
5c408ad8 JD |
4941 | (session->consumer->relay_major_version == 2 && |
4942 | session->consumer->relay_minor_version < 11)) { | |
d5a1b7aa | 4943 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY; |
d68c9a04 | 4944 | goto end; |
5c408ad8 JD |
4945 | } |
4946 | ||
a40a503f MD |
4947 | /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */ |
4948 | if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) { | |
4949 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL; | |
4950 | goto end; | |
4951 | } | |
4952 | ||
92816cc3 | 4953 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
92816cc3 JG |
4954 | DBG("Refusing to launch a rotation; a rotation is already in progress for session %s", |
4955 | session->name); | |
d5a1b7aa | 4956 | cmd_ret = LTTNG_ERR_ROTATION_PENDING; |
d68c9a04 | 4957 | goto end; |
5c408ad8 JD |
4958 | } |
4959 | ||
4960 | /* | |
4961 | * After a stop, we only allow one rotation to occur, the other ones are | |
4962 | * useless until a new start. | |
4963 | */ | |
4964 | if (session->rotated_after_last_stop) { | |
4965 | DBG("Session \"%s\" was already rotated after stop, refusing rotation", | |
4966 | session->name); | |
d5a1b7aa | 4967 | cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; |
d68c9a04 | 4968 | goto end; |
5c408ad8 | 4969 | } |
b02f5986 MD |
4970 | |
4971 | /* | |
4972 | * After a stop followed by a clear, disallow following rotations a they would | |
4973 | * generate empty chunks. | |
4974 | */ | |
4975 | if (session->cleared_after_last_stop) { | |
4976 | DBG("Session \"%s\" was already cleared after stop, refusing rotation", | |
4977 | session->name); | |
4978 | cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR; | |
4979 | goto end; | |
4980 | } | |
4981 | ||
d2956687 | 4982 | if (session->active) { |
348a81dc | 4983 | new_trace_chunk = session_create_new_trace_chunk(session, NULL, |
d2956687 JG |
4984 | NULL, NULL); |
4985 | if (!new_trace_chunk) { | |
4986 | cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
4987 | goto error; | |
5c408ad8 | 4988 | } |
d2956687 | 4989 | } |
2961f09e | 4990 | |
3156892b JG |
4991 | /* |
4992 | * The current trace chunk becomes the chunk being archived. | |
4993 | * | |
4994 | * After this point, "chunk_being_archived" must absolutely | |
4995 | * be closed on the consumer(s), otherwise it will never be | |
4996 | * cleaned-up, which will result in a leak. | |
4997 | */ | |
d2956687 JG |
4998 | ret = session_set_trace_chunk(session, new_trace_chunk, |
4999 | &chunk_being_archived); | |
5000 | if (ret) { | |
5001 | cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
b178f53e JG |
5002 | goto error; |
5003 | } | |
5004 | ||
5c408ad8 | 5005 | if (session->kernel_session) { |
d5a1b7aa JG |
5006 | cmd_ret = kernel_rotate_session(session); |
5007 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5008 | failed_to_rotate = true; |
5009 | rotation_fail_code = cmd_ret; | |
5c408ad8 JD |
5010 | } |
5011 | } | |
5012 | if (session->ust_session) { | |
d5a1b7aa JG |
5013 | cmd_ret = ust_app_rotate_session(session); |
5014 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5015 | failed_to_rotate = true; |
5016 | rotation_fail_code = cmd_ret; | |
5c408ad8 | 5017 | } |
92816cc3 | 5018 | } |
17dd1232 | 5019 | |
3b61d9ee JG |
5020 | if (!session->active) { |
5021 | session->rotated_after_last_stop = true; | |
5022 | } | |
5023 | ||
5024 | if (!chunk_being_archived) { | |
5025 | DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check", | |
5026 | session->name); | |
5027 | if (failed_to_rotate) { | |
5028 | cmd_ret = rotation_fail_code; | |
5029 | goto error; | |
5030 | } | |
5031 | cmd_ret = LTTNG_OK; | |
5032 | goto end; | |
5033 | } | |
5034 | ||
5035 | session->rotation_state = LTTNG_ROTATION_STATE_ONGOING; | |
5036 | chunk_status = lttng_trace_chunk_get_id(chunk_being_archived, | |
5037 | &ongoing_rotation_chunk_id); | |
5038 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5039 | ||
bbc4768c | 5040 | ret = session_close_trace_chunk(session, chunk_being_archived, |
343defc2 | 5041 | command, session->last_chunk_path); |
d2956687 JG |
5042 | if (ret) { |
5043 | cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; | |
5044 | goto error; | |
5045 | } | |
5046 | ||
3156892b JG |
5047 | if (failed_to_rotate) { |
5048 | cmd_ret = rotation_fail_code; | |
5049 | goto error; | |
5050 | } | |
5051 | ||
7fdbed1c | 5052 | session->quiet_rotation = quiet_rotation; |
92816cc3 JG |
5053 | ret = timer_session_rotation_pending_check_start(session, |
5054 | DEFAULT_ROTATE_PENDING_TIMER); | |
5055 | if (ret) { | |
d5a1b7aa | 5056 | cmd_ret = LTTNG_ERR_UNK; |
2961f09e | 5057 | goto error; |
5c408ad8 JD |
5058 | } |
5059 | ||
5c408ad8 | 5060 | if (rotate_return) { |
d2956687 | 5061 | rotate_return->rotation_id = ongoing_rotation_chunk_id; |
5c408ad8 JD |
5062 | } |
5063 | ||
d2956687 JG |
5064 | session->chunk_being_archived = chunk_being_archived; |
5065 | chunk_being_archived = NULL; | |
7fdbed1c JG |
5066 | if (!quiet_rotation) { |
5067 | ret = notification_thread_command_session_rotation_ongoing( | |
5068 | notification_thread_handle, | |
5069 | session->name, session->uid, session->gid, | |
5070 | ongoing_rotation_chunk_id); | |
5071 | if (ret != LTTNG_OK) { | |
5072 | ERR("Failed to notify notification thread that a session rotation is ongoing for session %s", | |
5073 | session->name); | |
5074 | cmd_ret = ret; | |
5075 | } | |
2961f09e JG |
5076 | } |
5077 | ||
92816cc3 | 5078 | DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent", |
d2956687 | 5079 | session->name, ongoing_rotation_chunk_id); |
5c408ad8 | 5080 | end: |
d2956687 JG |
5081 | lttng_trace_chunk_put(new_trace_chunk); |
5082 | lttng_trace_chunk_put(chunk_being_archived); | |
d5a1b7aa | 5083 | ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret); |
5c408ad8 | 5084 | return ret; |
2961f09e | 5085 | error: |
2961f09e | 5086 | if (session_reset_rotation_state(session, |
d2956687 | 5087 | LTTNG_ROTATION_STATE_ERROR)) { |
2961f09e JG |
5088 | ERR("Failed to reset rotation state of session \"%s\"", |
5089 | session->name); | |
5090 | } | |
5091 | goto end; | |
5c408ad8 JD |
5092 | } |
5093 | ||
5094 | /* | |
d68c9a04 | 5095 | * Command LTTNG_ROTATION_GET_INFO from the lttng-ctl library. |
5c408ad8 JD |
5096 | * |
5097 | * Check if the session has finished its rotation. | |
5098 | * | |
d2956687 | 5099 | * Return LTTNG_OK on success or else an LTTNG_ERR code. |
5c408ad8 | 5100 | */ |
d68c9a04 JD |
5101 | int cmd_rotate_get_info(struct ltt_session *session, |
5102 | struct lttng_rotation_get_info_return *info_return, | |
5103 | uint64_t rotation_id) | |
5c408ad8 | 5104 | { |
d2956687 JG |
5105 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5106 | enum lttng_rotation_state rotation_state; | |
5c408ad8 | 5107 | |
d68c9a04 | 5108 | DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, session->name, |
d2956687 | 5109 | session->most_recent_chunk_id.value); |
5c408ad8 | 5110 | |
d2956687 JG |
5111 | if (session->chunk_being_archived) { |
5112 | enum lttng_trace_chunk_status chunk_status; | |
5113 | uint64_t chunk_id; | |
5114 | ||
5115 | chunk_status = lttng_trace_chunk_get_id( | |
5116 | session->chunk_being_archived, | |
5117 | &chunk_id); | |
5118 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5119 | ||
5120 | rotation_state = rotation_id == chunk_id ? | |
5121 | LTTNG_ROTATION_STATE_ONGOING : | |
5122 | LTTNG_ROTATION_STATE_EXPIRED; | |
5123 | } else { | |
5124 | if (session->last_archived_chunk_id.is_set && | |
5125 | rotation_id != session->last_archived_chunk_id.value) { | |
5126 | rotation_state = LTTNG_ROTATION_STATE_EXPIRED; | |
5127 | } else { | |
5128 | rotation_state = session->rotation_state; | |
5129 | } | |
5c408ad8 JD |
5130 | } |
5131 | ||
d2956687 JG |
5132 | switch (rotation_state) { |
5133 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
83ed9e90 | 5134 | DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"", |
d2956687 JG |
5135 | session->name); |
5136 | goto end; | |
5137 | case LTTNG_ROTATION_STATE_EXPIRED: | |
5138 | DBG("Reporting that the rotation state of rotation id %" PRIu64 " of session \"%s\" has expired", | |
5139 | rotation_id, session->name); | |
5140 | break; | |
d68c9a04 | 5141 | case LTTNG_ROTATION_STATE_ONGOING: |
d2956687 | 5142 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending", |
d68c9a04 JD |
5143 | rotation_id, session->name); |
5144 | break; | |
5145 | case LTTNG_ROTATION_STATE_COMPLETED: | |
dd73d57b | 5146 | { |
d2956687 JG |
5147 | int fmt_ret; |
5148 | char *chunk_path; | |
dd73d57b JG |
5149 | char *current_tracing_path_reply; |
5150 | size_t current_tracing_path_reply_len; | |
5151 | ||
d2956687 JG |
5152 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed", |
5153 | rotation_id, session->name); | |
5154 | ||
dd73d57b JG |
5155 | switch (session_get_consumer_destination_type(session)) { |
5156 | case CONSUMER_DST_LOCAL: | |
5157 | current_tracing_path_reply = | |
5158 | info_return->location.local.absolute_path; | |
5159 | current_tracing_path_reply_len = | |
5160 | sizeof(info_return->location.local.absolute_path); | |
5161 | info_return->location_type = | |
05f8afa9 | 5162 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL; |
ecd1a12f MD |
5163 | fmt_ret = asprintf(&chunk_path, |
5164 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", | |
5165 | session_get_base_path(session), | |
5166 | session->last_archived_chunk_name); | |
5167 | if (fmt_ret == -1) { | |
5168 | PERROR("Failed to format the path of the last archived trace chunk"); | |
5169 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5170 | cmd_ret = LTTNG_ERR_UNK; | |
5171 | goto end; | |
5172 | } | |
dd73d57b JG |
5173 | break; |
5174 | case CONSUMER_DST_NET: | |
09cfbe47 JG |
5175 | { |
5176 | uint16_t ctrl_port, data_port; | |
5177 | ||
dd73d57b JG |
5178 | current_tracing_path_reply = |
5179 | info_return->location.relay.relative_path; | |
5180 | current_tracing_path_reply_len = | |
5181 | sizeof(info_return->location.relay.relative_path); | |
5182 | /* Currently the only supported relay protocol. */ | |
5183 | info_return->location.relay.protocol = | |
05f8afa9 | 5184 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP; |
dd73d57b | 5185 | |
d2956687 | 5186 | fmt_ret = lttng_strncpy(info_return->location.relay.host, |
dd73d57b JG |
5187 | session_get_net_consumer_hostname(session), |
5188 | sizeof(info_return->location.relay.host)); | |
d2956687 JG |
5189 | if (fmt_ret) { |
5190 | ERR("Failed to copy host name to rotate_get_info reply"); | |
dd73d57b | 5191 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5192 | cmd_ret = LTTNG_ERR_SET_URL; |
dd73d57b JG |
5193 | goto end; |
5194 | } | |
5195 | ||
09cfbe47 JG |
5196 | session_get_net_consumer_ports(session, &ctrl_port, &data_port); |
5197 | info_return->location.relay.ports.control = ctrl_port; | |
5198 | info_return->location.relay.ports.data = data_port; | |
dd73d57b | 5199 | info_return->location_type = |
05f8afa9 | 5200 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY; |
ecd1a12f MD |
5201 | chunk_path = strdup(session->last_chunk_path); |
5202 | if (!chunk_path) { | |
5203 | ERR("Failed to allocate the path of the last archived trace chunk"); | |
5204 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5205 | cmd_ret = LTTNG_ERR_UNK; | |
5206 | goto end; | |
5207 | } | |
dd73d57b | 5208 | break; |
09cfbe47 | 5209 | } |
dd73d57b JG |
5210 | default: |
5211 | abort(); | |
5212 | } | |
d2956687 JG |
5213 | |
5214 | fmt_ret = lttng_strncpy(current_tracing_path_reply, | |
5215 | chunk_path, current_tracing_path_reply_len); | |
5216 | free(chunk_path); | |
5217 | if (fmt_ret) { | |
5218 | ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply"); | |
d68c9a04 | 5219 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5220 | cmd_ret = LTTNG_ERR_UNK; |
5c408ad8 JD |
5221 | goto end; |
5222 | } | |
dd73d57b | 5223 | |
d68c9a04 | 5224 | break; |
dd73d57b | 5225 | } |
d68c9a04 | 5226 | case LTTNG_ROTATION_STATE_ERROR: |
d2956687 | 5227 | DBG("Reporting that an error occurred during rotation %" PRIu64 " of session \"%s\"", |
d68c9a04 JD |
5228 | rotation_id, session->name); |
5229 | break; | |
5230 | default: | |
5231 | abort(); | |
5c408ad8 JD |
5232 | } |
5233 | ||
d2956687 | 5234 | cmd_ret = LTTNG_OK; |
5c408ad8 | 5235 | end: |
d2956687 JG |
5236 | info_return->status = (int32_t) rotation_state; |
5237 | return cmd_ret; | |
5c408ad8 JD |
5238 | } |
5239 | ||
259c2674 JD |
5240 | /* |
5241 | * Command LTTNG_ROTATION_SET_SCHEDULE from the lttng-ctl library. | |
5242 | * | |
5243 | * Configure the automatic rotation parameters. | |
66ea93b1 JG |
5244 | * 'activate' to true means activate the rotation schedule type with 'new_value'. |
5245 | * 'activate' to false means deactivate the rotation schedule and validate that | |
5246 | * 'new_value' has the same value as the currently active value. | |
259c2674 | 5247 | * |
66ea93b1 | 5248 | * Return 0 on success or else a positive LTTNG_ERR code. |
259c2674 JD |
5249 | */ |
5250 | int cmd_rotation_set_schedule(struct ltt_session *session, | |
66ea93b1 JG |
5251 | bool activate, enum lttng_rotation_schedule_type schedule_type, |
5252 | uint64_t new_value, | |
90936dcf | 5253 | struct notification_thread_handle *notification_thread_handle) |
259c2674 JD |
5254 | { |
5255 | int ret; | |
66ea93b1 | 5256 | uint64_t *parameter_value; |
259c2674 JD |
5257 | |
5258 | assert(session); | |
5259 | ||
5260 | DBG("Cmd rotate set schedule session %s", session->name); | |
5261 | ||
92fe5ca1 | 5262 | if (session->live_timer || !session->output_traces) { |
66ea93b1 | 5263 | DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session"); |
259c2674 JD |
5264 | ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
5265 | goto end; | |
5266 | } | |
5267 | ||
66ea93b1 JG |
5268 | switch (schedule_type) { |
5269 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5270 | parameter_value = &session->rotate_size; | |
5271 | break; | |
5272 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5273 | parameter_value = &session->rotate_timer_period; | |
5274 | if (new_value >= UINT_MAX) { | |
5275 | DBG("Failing ROTATION_SET_SCHEDULE command as the value requested for a periodic rotation schedule is invalid: %" PRIu64 " > %u (UINT_MAX)", | |
5276 | new_value, UINT_MAX); | |
5277 | ret = LTTNG_ERR_INVALID; | |
5278 | goto end; | |
5279 | } | |
5280 | break; | |
5281 | default: | |
5282 | WARN("Failing ROTATION_SET_SCHEDULE command on unknown schedule type"); | |
5283 | ret = LTTNG_ERR_INVALID; | |
259c2674 | 5284 | goto end; |
66ea93b1 JG |
5285 | } |
5286 | ||
5287 | /* Improper use of the API. */ | |
5288 | if (new_value == -1ULL) { | |
5289 | WARN("Failing ROTATION_SET_SCHEDULE command as the value requested is -1"); | |
5290 | ret = LTTNG_ERR_INVALID; | |
259c2674 JD |
5291 | goto end; |
5292 | } | |
5293 | ||
66ea93b1 JG |
5294 | /* |
5295 | * As indicated in struct ltt_session's comments, a value of == 0 means | |
5296 | * this schedule rotation type is not in use. | |
5297 | * | |
5298 | * Reject the command if we were asked to activate a schedule that was | |
5299 | * already active. | |
5300 | */ | |
5301 | if (activate && *parameter_value != 0) { | |
5302 | DBG("Failing ROTATION_SET_SCHEDULE (activate) command as the schedule is already active"); | |
5303 | ret = LTTNG_ERR_ROTATION_SCHEDULE_SET; | |
90936dcf | 5304 | goto end; |
66ea93b1 JG |
5305 | } |
5306 | ||
5307 | /* | |
5308 | * Reject the command if we were asked to deactivate a schedule that was | |
5309 | * not active. | |
5310 | */ | |
5311 | if (!activate && *parameter_value == 0) { | |
5312 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as the schedule is already inactive"); | |
5313 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
90936dcf JD |
5314 | goto end; |
5315 | } | |
5316 | ||
66ea93b1 JG |
5317 | /* |
5318 | * Reject the command if we were asked to deactivate a schedule that | |
5319 | * doesn't exist. | |
5320 | */ | |
5321 | if (!activate && *parameter_value != new_value) { | |
5322 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as an inexistant schedule was provided"); | |
5323 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
5324 | goto end; | |
5325 | } | |
259c2674 | 5326 | |
66ea93b1 JG |
5327 | *parameter_value = activate ? new_value : 0; |
5328 | ||
5329 | switch (schedule_type) { | |
5330 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5331 | if (activate && session->active) { | |
5332 | /* | |
5333 | * Only start the timer if the session is active, | |
5334 | * otherwise it will be started when the session starts. | |
5335 | */ | |
92816cc3 JG |
5336 | ret = timer_session_rotation_schedule_timer_start( |
5337 | session, new_value); | |
259c2674 | 5338 | if (ret) { |
66ea93b1 | 5339 | ERR("Failed to enable session rotation timer in ROTATION_SET_SCHEDULE command"); |
259c2674 JD |
5340 | ret = LTTNG_ERR_UNK; |
5341 | goto end; | |
5342 | } | |
66ea93b1 | 5343 | } else { |
92816cc3 JG |
5344 | ret = timer_session_rotation_schedule_timer_stop( |
5345 | session); | |
66ea93b1 JG |
5346 | if (ret) { |
5347 | ERR("Failed to disable session rotation timer in ROTATION_SET_SCHEDULE command"); | |
5348 | ret = LTTNG_ERR_UNK; | |
f3ce6946 | 5349 | goto end; |
66ea93b1 | 5350 | } |
259c2674 | 5351 | } |
66ea93b1 JG |
5352 | break; |
5353 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5354 | if (activate) { | |
5355 | ret = subscribe_session_consumed_size_rotation(session, | |
5356 | new_value, notification_thread_handle); | |
90936dcf | 5357 | if (ret) { |
66ea93b1 | 5358 | ERR("Failed to enable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5359 | ret = LTTNG_ERR_UNK; |
5360 | goto end; | |
5361 | } | |
90936dcf | 5362 | } else { |
66ea93b1 JG |
5363 | ret = unsubscribe_session_consumed_size_rotation(session, |
5364 | notification_thread_handle); | |
90936dcf | 5365 | if (ret) { |
66ea93b1 | 5366 | ERR("Failed to disable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5367 | ret = LTTNG_ERR_UNK; |
5368 | goto end; | |
5369 | } | |
66ea93b1 | 5370 | |
90936dcf | 5371 | } |
66ea93b1 JG |
5372 | break; |
5373 | default: | |
5374 | /* Would have been caught before. */ | |
5375 | abort(); | |
90936dcf JD |
5376 | } |
5377 | ||
259c2674 JD |
5378 | ret = LTTNG_OK; |
5379 | ||
5380 | goto end; | |
5381 | ||
5382 | end: | |
5383 | return ret; | |
5384 | } | |
5385 | ||
a503e1ef JG |
5386 | /* Wait for a given path to be removed before continuing. */ |
5387 | static enum lttng_error_code wait_on_path(void *path_data) | |
5388 | { | |
5389 | const char *shm_path = path_data; | |
5390 | ||
5391 | DBG("Waiting for the shm path at %s to be removed before completing session destruction", | |
5392 | shm_path); | |
5393 | while (true) { | |
5394 | int ret; | |
5395 | struct stat st; | |
5396 | ||
5397 | ret = stat(shm_path, &st); | |
5398 | if (ret) { | |
5399 | if (errno != ENOENT) { | |
5400 | PERROR("stat() returned an error while checking for the existence of the shm path"); | |
5401 | } else { | |
5402 | DBG("shm path no longer exists, completing the destruction of session"); | |
5403 | } | |
5404 | break; | |
5405 | } else { | |
5406 | if (!S_ISDIR(st.st_mode)) { | |
5407 | ERR("The type of shm path %s returned by stat() is not a directory; aborting the wait for shm path removal", | |
5408 | shm_path); | |
5409 | break; | |
5410 | } | |
5411 | } | |
5412 | usleep(SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US); | |
5413 | } | |
5414 | return LTTNG_OK; | |
5415 | } | |
5416 | ||
5417 | /* | |
5418 | * Returns a pointer to a handler to run on completion of a command. | |
5419 | * Returns NULL if no handler has to be run for the last command executed. | |
5420 | */ | |
5421 | const struct cmd_completion_handler *cmd_pop_completion_handler(void) | |
5422 | { | |
5423 | struct cmd_completion_handler *handler = current_completion_handler; | |
5424 | ||
5425 | current_completion_handler = NULL; | |
5426 | return handler; | |
5427 | } | |
5428 | ||
2f77fc4b DG |
5429 | /* |
5430 | * Init command subsystem. | |
5431 | */ | |
5432 | void cmd_init(void) | |
5433 | { | |
5434 | /* | |
d88aee68 DG |
5435 | * Set network sequence index to 1 for streams to match a relayd |
5436 | * socket on the consumer side. | |
2f77fc4b | 5437 | */ |
d88aee68 DG |
5438 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
5439 | relayd_net_seq_idx = 1; | |
5440 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
5441 | |
5442 | DBG("Command subsystem initialized"); | |
5443 | } |