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 | ||
159b042f JG |
9 | #include "bin/lttng-sessiond/tracker.h" |
10 | #include "lttng/lttng-error.h" | |
11 | #include "lttng/tracker.h" | |
6c1c0768 | 12 | #define _LGPL_SOURCE |
2f77fc4b | 13 | #include <assert.h> |
6dc3064a | 14 | #include <inttypes.h> |
2f77fc4b DG |
15 | #include <urcu/list.h> |
16 | #include <urcu/uatomic.h> | |
a503e1ef | 17 | #include <sys/stat.h> |
d2956687 | 18 | #include <stdio.h> |
2f77fc4b DG |
19 | |
20 | #include <common/defaults.h> | |
21 | #include <common/common.h> | |
22 | #include <common/sessiond-comm/sessiond-comm.h> | |
23 | #include <common/relayd/relayd.h> | |
10a50311 | 24 | #include <common/utils.h> |
f5436bfc | 25 | #include <common/compat/string.h> |
93ec662e | 26 | #include <common/kernel-ctl/kernel-ctl.h> |
b0880ae5 JG |
27 | #include <common/dynamic-buffer.h> |
28 | #include <common/buffer-view.h> | |
82b69413 | 29 | #include <common/trace-chunk.h> |
3e3665b8 | 30 | #include <lttng/location-internal.h> |
b0880ae5 JG |
31 | #include <lttng/trigger/trigger-internal.h> |
32 | #include <lttng/condition/condition.h> | |
5024c2ac JR |
33 | #include <lttng/condition/condition-internal.h> |
34 | #include <lttng/condition/event-rule.h> | |
35 | #include <lttng/condition/event-rule-internal.h> | |
36 | #include <lttng/event-rule/event-rule.h> | |
37 | #include <lttng/event-rule/event-rule-internal.h> | |
38 | #include <lttng/event-rule/uprobe-internal.h> | |
39 | #include <lttng/event-rule/tracepoint.h> | |
b0880ae5 | 40 | #include <lttng/action/action.h> |
6e21424e | 41 | #include <lttng/channel.h> |
b0880ae5 | 42 | #include <lttng/channel-internal.h> |
5c408ad8 | 43 | #include <lttng/rotate-internal.h> |
17dd1232 | 44 | #include <lttng/location-internal.h> |
b178f53e | 45 | #include <lttng/session-internal.h> |
3c02e545 | 46 | #include <lttng/userspace-probe-internal.h> |
b178f53e | 47 | #include <lttng/session-descriptor-internal.h> |
9f449915 | 48 | #include <common/string-utils/string-utils.h> |
2f77fc4b DG |
49 | |
50 | #include "channel.h" | |
51 | #include "consumer.h" | |
52 | #include "event.h" | |
8782cc74 | 53 | #include "health-sessiond.h" |
2f77fc4b DG |
54 | #include "kernel.h" |
55 | #include "kernel-consumer.h" | |
56 | #include "lttng-sessiond.h" | |
57 | #include "utils.h" | |
0dbc2034 | 58 | #include "lttng-syscall.h" |
7c1d2758 | 59 | #include "agent.h" |
93ec662e | 60 | #include "buffer-registry.h" |
b0880ae5 JG |
61 | #include "notification-thread.h" |
62 | #include "notification-thread-commands.h" | |
5c408ad8 JD |
63 | #include "rotate.h" |
64 | #include "rotation-thread.h" | |
8e319828 | 65 | #include "timer.h" |
f28f9e44 | 66 | #include "agent-thread.h" |
2f77fc4b DG |
67 | |
68 | #include "cmd.h" | |
69 | ||
a503e1ef JG |
70 | /* Sleep for 100ms between each check for the shm path's deletion. */ |
71 | #define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000 | |
72 | ||
3e3665b8 JG |
73 | struct cmd_destroy_session_reply_context { |
74 | int reply_sock_fd; | |
75 | bool implicit_rotation_on_destroy; | |
3285a971 JG |
76 | /* |
77 | * Indicates whether or not an error occurred while launching the | |
78 | * destruction of a session. | |
79 | */ | |
80 | enum lttng_error_code destruction_status; | |
3e3665b8 JG |
81 | }; |
82 | ||
a503e1ef JG |
83 | static enum lttng_error_code wait_on_path(void *path); |
84 | ||
85 | /* | |
86 | * Command completion handler that is used by the destroy command | |
87 | * when a session that has a non-default shm_path is being destroyed. | |
88 | * | |
89 | * See comment in cmd_destroy_session() for the rationale. | |
90 | */ | |
91 | static struct destroy_completion_handler { | |
92 | struct cmd_completion_handler handler; | |
93 | char shm_path[member_sizeof(struct ltt_session, shm_path)]; | |
94 | } destroy_completion_handler = { | |
95 | .handler = { | |
96 | .run = wait_on_path, | |
97 | .data = destroy_completion_handler.shm_path | |
98 | }, | |
99 | .shm_path = { 0 }, | |
100 | }; | |
101 | ||
102 | static struct cmd_completion_handler *current_completion_handler; | |
103 | ||
2f77fc4b DG |
104 | /* |
105 | * Used to keep a unique index for each relayd socket created where this value | |
106 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
107 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
108 | * held. | |
2f77fc4b | 109 | */ |
d88aee68 DG |
110 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
111 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 112 | |
7076b56e JG |
113 | static int validate_ust_event_name(const char *); |
114 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 115 | const struct lttng_domain *domain, |
7076b56e JG |
116 | char *channel_name, struct lttng_event *event, |
117 | char *filter_expression, | |
5024c2ac | 118 | struct lttng_bytecode *filter, |
7076b56e JG |
119 | struct lttng_event_exclusion *exclusion, |
120 | int wpipe); | |
121 | ||
2f77fc4b DG |
122 | /* |
123 | * Create a session path used by list_lttng_sessions for the case that the | |
124 | * session consumer is on the network. | |
125 | */ | |
126 | static int build_network_session_path(char *dst, size_t size, | |
127 | struct ltt_session *session) | |
128 | { | |
129 | int ret, kdata_port, udata_port; | |
130 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
131 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
132 | ||
133 | assert(session); | |
134 | assert(dst); | |
135 | ||
136 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
137 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
138 | ||
139 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
140 | ||
141 | if (session->kernel_session && session->kernel_session->consumer) { | |
142 | kuri = &session->kernel_session->consumer->dst.net.control; | |
143 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
144 | } | |
145 | ||
146 | if (session->ust_session && session->ust_session->consumer) { | |
147 | uuri = &session->ust_session->consumer->dst.net.control; | |
148 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
149 | } | |
150 | ||
151 | if (uuri == NULL && kuri == NULL) { | |
152 | uri = &session->consumer->dst.net.control; | |
153 | kdata_port = session->consumer->dst.net.data.port; | |
154 | } else if (kuri && uuri) { | |
155 | ret = uri_compare(kuri, uuri); | |
156 | if (ret) { | |
157 | /* Not Equal */ | |
158 | uri = kuri; | |
159 | /* Build uuri URL string */ | |
160 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
161 | if (ret < 0) { | |
162 | goto error; | |
163 | } | |
164 | } else { | |
165 | uri = kuri; | |
166 | } | |
167 | } else if (kuri && uuri == NULL) { | |
168 | uri = kuri; | |
169 | } else if (uuri && kuri == NULL) { | |
170 | uri = uuri; | |
171 | } | |
172 | ||
173 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
174 | if (ret < 0) { | |
175 | goto error; | |
176 | } | |
177 | ||
9aa9f900 DG |
178 | /* |
179 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
180 | * to print. | |
181 | */ | |
9d035200 | 182 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
183 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
184 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
185 | } else { | |
9aa9f900 | 186 | int dport; |
bef08707 | 187 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
188 | dport = kdata_port; |
189 | } else { | |
190 | /* No kernel URI, use the UST port. */ | |
191 | dport = udata_port; | |
192 | } | |
193 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
194 | } |
195 | ||
196 | error: | |
197 | return ret; | |
198 | } | |
199 | ||
fb83fe64 JD |
200 | /* |
201 | * Get run-time attributes if the session has been started (discarded events, | |
202 | * lost packets). | |
203 | */ | |
204 | static int get_kernel_runtime_stats(struct ltt_session *session, | |
205 | struct ltt_kernel_channel *kchan, uint64_t *discarded_events, | |
206 | uint64_t *lost_packets) | |
207 | { | |
208 | int ret; | |
209 | ||
210 | if (!session->has_been_started) { | |
211 | ret = 0; | |
212 | *discarded_events = 0; | |
213 | *lost_packets = 0; | |
214 | goto end; | |
215 | } | |
216 | ||
e1f3997a | 217 | ret = consumer_get_discarded_events(session->id, kchan->key, |
fb83fe64 JD |
218 | session->kernel_session->consumer, |
219 | discarded_events); | |
220 | if (ret < 0) { | |
221 | goto end; | |
222 | } | |
223 | ||
e1f3997a | 224 | ret = consumer_get_lost_packets(session->id, kchan->key, |
fb83fe64 JD |
225 | session->kernel_session->consumer, |
226 | lost_packets); | |
227 | if (ret < 0) { | |
228 | goto end; | |
229 | } | |
230 | ||
231 | end: | |
232 | return ret; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Get run-time attributes if the session has been started (discarded events, | |
237 | * lost packets). | |
238 | */ | |
239 | static int get_ust_runtime_stats(struct ltt_session *session, | |
240 | struct ltt_ust_channel *uchan, uint64_t *discarded_events, | |
241 | uint64_t *lost_packets) | |
242 | { | |
243 | int ret; | |
244 | struct ltt_ust_session *usess; | |
245 | ||
a91c5803 JG |
246 | if (!discarded_events || !lost_packets) { |
247 | ret = -1; | |
248 | goto end; | |
249 | } | |
250 | ||
fb83fe64 | 251 | usess = session->ust_session; |
a905c624 JG |
252 | assert(discarded_events); |
253 | assert(lost_packets); | |
fb83fe64 JD |
254 | |
255 | if (!usess || !session->has_been_started) { | |
256 | *discarded_events = 0; | |
257 | *lost_packets = 0; | |
258 | ret = 0; | |
259 | goto end; | |
260 | } | |
261 | ||
262 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
263 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
264 | &usess->buffer_reg_uid_list, | |
265 | usess->consumer, uchan->id, | |
266 | uchan->attr.overwrite, | |
267 | discarded_events, | |
268 | lost_packets); | |
269 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { | |
270 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
271 | uchan, usess->consumer, | |
272 | uchan->attr.overwrite, | |
273 | discarded_events, | |
274 | lost_packets); | |
275 | if (ret < 0) { | |
276 | goto end; | |
277 | } | |
278 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
279 | *lost_packets += uchan->per_pid_closed_app_lost; | |
280 | } else { | |
281 | ERR("Unsupported buffer type"); | |
967bc289 | 282 | assert(0); |
fb83fe64 JD |
283 | ret = -1; |
284 | goto end; | |
285 | } | |
286 | ||
287 | end: | |
288 | return ret; | |
289 | } | |
290 | ||
2f77fc4b DG |
291 | /* |
292 | * Fill lttng_channel array of all channels. | |
293 | */ | |
d449df4a | 294 | static ssize_t list_lttng_channels(enum lttng_domain_type domain, |
fb83fe64 | 295 | struct ltt_session *session, struct lttng_channel *channels, |
cf0bcb51 | 296 | struct lttng_channel_extended *chan_exts) |
2f77fc4b | 297 | { |
d449df4a | 298 | int i = 0, ret = 0; |
2f77fc4b DG |
299 | struct ltt_kernel_channel *kchan; |
300 | ||
301 | DBG("Listing channels for session %s", session->name); | |
302 | ||
303 | switch (domain) { | |
304 | case LTTNG_DOMAIN_KERNEL: | |
305 | /* Kernel channels */ | |
306 | if (session->kernel_session != NULL) { | |
307 | cds_list_for_each_entry(kchan, | |
308 | &session->kernel_session->channel_list.head, list) { | |
fb83fe64 | 309 | uint64_t discarded_events, lost_packets; |
cf0bcb51 JG |
310 | struct lttng_channel_extended *extended; |
311 | ||
312 | extended = (struct lttng_channel_extended *) | |
313 | kchan->channel->attr.extended.ptr; | |
fb83fe64 JD |
314 | |
315 | ret = get_kernel_runtime_stats(session, kchan, | |
316 | &discarded_events, &lost_packets); | |
317 | if (ret < 0) { | |
318 | goto end; | |
319 | } | |
2f77fc4b DG |
320 | /* Copy lttng_channel struct to array */ |
321 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
322 | channels[i].enabled = kchan->enabled; | |
fb83fe64 JD |
323 | chan_exts[i].discarded_events = |
324 | discarded_events; | |
325 | chan_exts[i].lost_packets = lost_packets; | |
cf0bcb51 JG |
326 | chan_exts[i].monitor_timer_interval = |
327 | extended->monitor_timer_interval; | |
491d1539 | 328 | chan_exts[i].blocking_timeout = 0; |
2f77fc4b DG |
329 | i++; |
330 | } | |
331 | } | |
332 | break; | |
333 | case LTTNG_DOMAIN_UST: | |
334 | { | |
335 | struct lttng_ht_iter iter; | |
336 | struct ltt_ust_channel *uchan; | |
337 | ||
e7fe706f | 338 | rcu_read_lock(); |
2f77fc4b DG |
339 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
340 | &iter.iter, uchan, node.node) { | |
a91c5803 | 341 | uint64_t discarded_events = 0, lost_packets = 0; |
fb83fe64 | 342 | |
8ee609c8 MD |
343 | if (lttng_strncpy(channels[i].name, uchan->name, |
344 | LTTNG_SYMBOL_NAME_LEN)) { | |
345 | break; | |
346 | } | |
2f77fc4b DG |
347 | channels[i].attr.overwrite = uchan->attr.overwrite; |
348 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
349 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
350 | channels[i].attr.switch_timer_interval = | |
351 | uchan->attr.switch_timer_interval; | |
352 | channels[i].attr.read_timer_interval = | |
353 | uchan->attr.read_timer_interval; | |
354 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
355 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
356 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
5e4435a4 JG |
357 | |
358 | /* | |
359 | * Map enum lttng_ust_output to enum lttng_event_output. | |
360 | */ | |
2f77fc4b DG |
361 | switch (uchan->attr.output) { |
362 | case LTTNG_UST_MMAP: | |
2f77fc4b DG |
363 | channels[i].attr.output = LTTNG_EVENT_MMAP; |
364 | break; | |
5e4435a4 JG |
365 | default: |
366 | /* | |
367 | * LTTNG_UST_MMAP is the only supported UST | |
368 | * output mode. | |
369 | */ | |
370 | assert(0); | |
371 | break; | |
2f77fc4b | 372 | } |
fb83fe64 | 373 | |
d449df4a MD |
374 | chan_exts[i].monitor_timer_interval = |
375 | uchan->monitor_timer_interval; | |
491d1539 MD |
376 | chan_exts[i].blocking_timeout = |
377 | uchan->attr.u.s.blocking_timeout; | |
d449df4a | 378 | |
fb83fe64 JD |
379 | ret = get_ust_runtime_stats(session, uchan, |
380 | &discarded_events, &lost_packets); | |
381 | if (ret < 0) { | |
382 | break; | |
383 | } | |
384 | chan_exts[i].discarded_events = discarded_events; | |
385 | chan_exts[i].lost_packets = lost_packets; | |
2f77fc4b DG |
386 | i++; |
387 | } | |
e7fe706f | 388 | rcu_read_unlock(); |
2f77fc4b DG |
389 | break; |
390 | } | |
391 | default: | |
392 | break; | |
393 | } | |
fb83fe64 JD |
394 | |
395 | end: | |
d449df4a MD |
396 | if (ret < 0) { |
397 | return -LTTNG_ERR_FATAL; | |
398 | } else { | |
399 | return LTTNG_OK; | |
400 | } | |
2f77fc4b DG |
401 | } |
402 | ||
3c02e545 FD |
403 | static int increment_extended_len(const char *filter_expression, |
404 | struct lttng_event_exclusion *exclusion, | |
405 | const struct lttng_userspace_probe_location *probe_location, | |
406 | size_t *extended_len) | |
b4e3ceb9 | 407 | { |
3c02e545 FD |
408 | int ret = 0; |
409 | ||
b4e3ceb9 PP |
410 | *extended_len += sizeof(struct lttcomm_event_extended_header); |
411 | ||
412 | if (filter_expression) { | |
413 | *extended_len += strlen(filter_expression) + 1; | |
414 | } | |
795d57ce PP |
415 | |
416 | if (exclusion) { | |
417 | *extended_len += exclusion->count * LTTNG_SYMBOL_NAME_LEN; | |
418 | } | |
3c02e545 FD |
419 | |
420 | if (probe_location) { | |
421 | ret = lttng_userspace_probe_location_serialize(probe_location, | |
422 | NULL, NULL); | |
423 | if (ret < 0) { | |
424 | goto end; | |
425 | } | |
426 | *extended_len += ret; | |
427 | } | |
428 | ret = 0; | |
429 | end: | |
430 | return ret; | |
b4e3ceb9 PP |
431 | } |
432 | ||
3c02e545 FD |
433 | static int append_extended_info(const char *filter_expression, |
434 | struct lttng_event_exclusion *exclusion, | |
435 | struct lttng_userspace_probe_location *probe_location, | |
436 | void **extended_at) | |
b4e3ceb9 | 437 | { |
3c02e545 | 438 | int ret = 0; |
b4e3ceb9 | 439 | size_t filter_len = 0; |
795d57ce | 440 | size_t nb_exclusions = 0; |
3c02e545 FD |
441 | size_t userspace_probe_location_len = 0; |
442 | struct lttng_dynamic_buffer location_buffer; | |
443 | struct lttcomm_event_extended_header extended_header; | |
b4e3ceb9 PP |
444 | |
445 | if (filter_expression) { | |
446 | filter_len = strlen(filter_expression) + 1; | |
447 | } | |
448 | ||
795d57ce PP |
449 | if (exclusion) { |
450 | nb_exclusions = exclusion->count; | |
451 | } | |
452 | ||
3c02e545 FD |
453 | if (probe_location) { |
454 | lttng_dynamic_buffer_init(&location_buffer); | |
455 | ret = lttng_userspace_probe_location_serialize(probe_location, | |
456 | &location_buffer, NULL); | |
457 | if (ret < 0) { | |
458 | ret = -1; | |
459 | goto end; | |
460 | } | |
461 | userspace_probe_location_len = location_buffer.size; | |
462 | } | |
463 | ||
795d57ce | 464 | /* Set header fields */ |
b4e3ceb9 | 465 | extended_header.filter_len = filter_len; |
795d57ce | 466 | extended_header.nb_exclusions = nb_exclusions; |
3c02e545 | 467 | extended_header.userspace_probe_location_len = userspace_probe_location_len; |
795d57ce PP |
468 | |
469 | /* Copy header */ | |
b4e3ceb9 PP |
470 | memcpy(*extended_at, &extended_header, sizeof(extended_header)); |
471 | *extended_at += sizeof(extended_header); | |
795d57ce PP |
472 | |
473 | /* Copy filter string */ | |
474 | if (filter_expression) { | |
475 | memcpy(*extended_at, filter_expression, filter_len); | |
476 | *extended_at += filter_len; | |
477 | } | |
478 | ||
479 | /* Copy exclusion names */ | |
480 | if (exclusion) { | |
481 | size_t len = nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
482 | ||
483 | memcpy(*extended_at, &exclusion->names, len); | |
484 | *extended_at += len; | |
485 | } | |
3c02e545 FD |
486 | |
487 | if (probe_location) { | |
488 | memcpy(*extended_at, location_buffer.data, location_buffer.size); | |
489 | *extended_at += location_buffer.size; | |
490 | lttng_dynamic_buffer_reset(&location_buffer); | |
491 | } | |
492 | ret = 0; | |
493 | end: | |
494 | return ret; | |
b4e3ceb9 PP |
495 | } |
496 | ||
3c6a091f | 497 | /* |
022d91ba | 498 | * Create a list of agent domain events. |
3c6a091f DG |
499 | * |
500 | * Return number of events in list on success or else a negative value. | |
501 | */ | |
022d91ba | 502 | static int list_lttng_agent_events(struct agent *agt, |
b4e3ceb9 | 503 | struct lttng_event **events, size_t *total_size) |
3c6a091f DG |
504 | { |
505 | int i = 0, ret = 0; | |
506 | unsigned int nb_event = 0; | |
022d91ba | 507 | struct agent_event *event; |
47e52862 | 508 | struct lttng_event *tmp_events = NULL; |
3c6a091f | 509 | struct lttng_ht_iter iter; |
b4e3ceb9 PP |
510 | size_t extended_len = 0; |
511 | void *extended_at; | |
3c6a091f | 512 | |
022d91ba | 513 | assert(agt); |
3c6a091f DG |
514 | assert(events); |
515 | ||
022d91ba | 516 | DBG3("Listing agent events"); |
3c6a091f | 517 | |
e5bbf678 | 518 | rcu_read_lock(); |
022d91ba | 519 | nb_event = lttng_ht_get_count(agt->events); |
e5bbf678 | 520 | rcu_read_unlock(); |
3c6a091f DG |
521 | if (nb_event == 0) { |
522 | ret = nb_event; | |
b4e3ceb9 | 523 | *total_size = 0; |
3c6a091f DG |
524 | goto error; |
525 | } | |
526 | ||
b4e3ceb9 PP |
527 | /* Compute required extended infos size */ |
528 | extended_len = nb_event * sizeof(struct lttcomm_event_extended_header); | |
529 | ||
530 | /* | |
531 | * This is only valid because the commands which add events are | |
532 | * processed in the same thread as the listing. | |
533 | */ | |
534 | rcu_read_lock(); | |
535 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { | |
3c02e545 | 536 | ret = increment_extended_len(event->filter_expression, NULL, NULL, |
795d57ce | 537 | &extended_len); |
3c02e545 FD |
538 | if (ret) { |
539 | DBG("Error computing the length of extended info message"); | |
540 | ret = -LTTNG_ERR_FATAL; | |
541 | goto error; | |
542 | } | |
b4e3ceb9 PP |
543 | } |
544 | rcu_read_unlock(); | |
545 | ||
546 | *total_size = nb_event * sizeof(*tmp_events) + extended_len; | |
547 | tmp_events = zmalloc(*total_size); | |
3c6a091f | 548 | if (!tmp_events) { |
022d91ba | 549 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
550 | ret = -LTTNG_ERR_FATAL; |
551 | goto error; | |
552 | } | |
553 | ||
b4e3ceb9 PP |
554 | extended_at = ((uint8_t *) tmp_events) + |
555 | nb_event * sizeof(struct lttng_event); | |
556 | ||
3c6a091f | 557 | rcu_read_lock(); |
022d91ba | 558 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
559 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
560 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
561 | tmp_events[i].enabled = event->enabled; | |
2106efa0 | 562 | tmp_events[i].loglevel = event->loglevel_value; |
ff94328f | 563 | tmp_events[i].loglevel_type = event->loglevel_type; |
3c6a091f | 564 | i++; |
b4e3ceb9 PP |
565 | |
566 | /* Append extended info */ | |
3c02e545 | 567 | ret = append_extended_info(event->filter_expression, NULL, NULL, |
795d57ce | 568 | &extended_at); |
3c02e545 FD |
569 | if (ret) { |
570 | DBG("Error appending extended info message"); | |
571 | ret = -LTTNG_ERR_FATAL; | |
572 | goto error; | |
573 | } | |
3c6a091f | 574 | } |
3c6a091f DG |
575 | |
576 | *events = tmp_events; | |
577 | ret = nb_event; | |
3c02e545 | 578 | assert(nb_event == i); |
3c6a091f | 579 | |
47e52862 | 580 | end: |
3c02e545 | 581 | rcu_read_unlock(); |
3c6a091f | 582 | return ret; |
47e52862 JG |
583 | error: |
584 | free(tmp_events); | |
585 | goto end; | |
3c6a091f DG |
586 | } |
587 | ||
2f77fc4b DG |
588 | /* |
589 | * Create a list of ust global domain events. | |
590 | */ | |
591 | static int list_lttng_ust_global_events(char *channel_name, | |
b4e3ceb9 PP |
592 | struct ltt_ust_domain_global *ust_global, |
593 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
594 | { |
595 | int i = 0, ret = 0; | |
596 | unsigned int nb_event = 0; | |
597 | struct lttng_ht_iter iter; | |
598 | struct lttng_ht_node_str *node; | |
599 | struct ltt_ust_channel *uchan; | |
600 | struct ltt_ust_event *uevent; | |
601 | struct lttng_event *tmp; | |
b4e3ceb9 PP |
602 | size_t extended_len = 0; |
603 | void *extended_at; | |
2f77fc4b DG |
604 | |
605 | DBG("Listing UST global events for channel %s", channel_name); | |
606 | ||
607 | rcu_read_lock(); | |
608 | ||
609 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
610 | node = lttng_ht_iter_get_node_str(&iter); | |
611 | if (node == NULL) { | |
f73fabfd | 612 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
d31d3e8c | 613 | goto end; |
2f77fc4b DG |
614 | } |
615 | ||
616 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
617 | ||
3c442be3 | 618 | nb_event = lttng_ht_get_count(uchan->events); |
2f77fc4b DG |
619 | if (nb_event == 0) { |
620 | ret = nb_event; | |
b4e3ceb9 | 621 | *total_size = 0; |
d31d3e8c | 622 | goto end; |
2f77fc4b DG |
623 | } |
624 | ||
625 | DBG3("Listing UST global %d events", nb_event); | |
626 | ||
b4e3ceb9 PP |
627 | /* Compute required extended infos size */ |
628 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
629 | if (uevent->internal) { | |
630 | nb_event--; | |
631 | continue; | |
632 | } | |
633 | ||
3c02e545 FD |
634 | ret = increment_extended_len(uevent->filter_expression, |
635 | uevent->exclusion, NULL, &extended_len); | |
636 | if (ret) { | |
637 | DBG("Error computing the length of extended info message"); | |
638 | ret = -LTTNG_ERR_FATAL; | |
639 | goto end; | |
640 | } | |
b4e3ceb9 | 641 | } |
d31d3e8c PP |
642 | if (nb_event == 0) { |
643 | /* All events are internal, skip. */ | |
644 | ret = 0; | |
645 | *total_size = 0; | |
646 | goto end; | |
647 | } | |
b4e3ceb9 PP |
648 | |
649 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
650 | tmp = zmalloc(*total_size); | |
2f77fc4b | 651 | if (tmp == NULL) { |
b12c38df JG |
652 | ret = -LTTNG_ERR_FATAL; |
653 | goto end; | |
2f77fc4b DG |
654 | } |
655 | ||
b4e3ceb9 PP |
656 | extended_at = ((uint8_t *) tmp) + nb_event * sizeof(struct lttng_event); |
657 | ||
2f77fc4b | 658 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
3c442be3 JG |
659 | if (uevent->internal) { |
660 | /* This event should remain hidden from clients */ | |
3c442be3 JG |
661 | continue; |
662 | } | |
2f77fc4b DG |
663 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
664 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
665 | tmp[i].enabled = uevent->enabled; | |
666 | ||
667 | switch (uevent->attr.instrumentation) { | |
668 | case LTTNG_UST_TRACEPOINT: | |
669 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
670 | break; | |
671 | case LTTNG_UST_PROBE: | |
672 | tmp[i].type = LTTNG_EVENT_PROBE; | |
673 | break; | |
674 | case LTTNG_UST_FUNCTION: | |
675 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
676 | break; | |
677 | } | |
678 | ||
679 | tmp[i].loglevel = uevent->attr.loglevel; | |
680 | switch (uevent->attr.loglevel_type) { | |
681 | case LTTNG_UST_LOGLEVEL_ALL: | |
682 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
683 | break; | |
684 | case LTTNG_UST_LOGLEVEL_RANGE: | |
685 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
686 | break; | |
687 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
688 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
689 | break; | |
690 | } | |
691 | if (uevent->filter) { | |
692 | tmp[i].filter = 1; | |
693 | } | |
4634f12e JI |
694 | if (uevent->exclusion) { |
695 | tmp[i].exclusion = 1; | |
696 | } | |
2f77fc4b | 697 | i++; |
b4e3ceb9 PP |
698 | |
699 | /* Append extended info */ | |
3c02e545 FD |
700 | ret = append_extended_info(uevent->filter_expression, |
701 | uevent->exclusion, NULL, &extended_at); | |
702 | if (ret) { | |
703 | DBG("Error appending extended info message"); | |
704 | ret = -LTTNG_ERR_FATAL; | |
705 | goto end; | |
706 | } | |
2f77fc4b DG |
707 | } |
708 | ||
709 | ret = nb_event; | |
710 | *events = tmp; | |
d31d3e8c | 711 | end: |
2f77fc4b DG |
712 | rcu_read_unlock(); |
713 | return ret; | |
714 | } | |
715 | ||
716 | /* | |
717 | * Fill lttng_event array of all kernel events in the channel. | |
718 | */ | |
719 | static int list_lttng_kernel_events(char *channel_name, | |
b4e3ceb9 PP |
720 | struct ltt_kernel_session *kernel_session, |
721 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
722 | { |
723 | int i = 0, ret; | |
724 | unsigned int nb_event; | |
725 | struct ltt_kernel_event *event; | |
726 | struct ltt_kernel_channel *kchan; | |
b4e3ceb9 PP |
727 | size_t extended_len = 0; |
728 | void *extended_at; | |
2f77fc4b DG |
729 | |
730 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
731 | if (kchan == NULL) { | |
f73fabfd | 732 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
733 | goto error; |
734 | } | |
735 | ||
736 | nb_event = kchan->event_count; | |
737 | ||
738 | DBG("Listing events for channel %s", kchan->channel->name); | |
739 | ||
740 | if (nb_event == 0) { | |
b4e3ceb9 | 741 | *total_size = 0; |
834978fd | 742 | *events = NULL; |
db906c12 | 743 | goto end; |
2f77fc4b DG |
744 | } |
745 | ||
b4e3ceb9 PP |
746 | /* Compute required extended infos size */ |
747 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { | |
3c02e545 FD |
748 | ret = increment_extended_len(event->filter_expression, NULL, |
749 | event->userspace_probe_location, | |
795d57ce | 750 | &extended_len); |
3c02e545 FD |
751 | if (ret) { |
752 | DBG("Error computing the length of extended info message"); | |
753 | ret = -LTTNG_ERR_FATAL; | |
754 | goto error; | |
755 | } | |
b4e3ceb9 PP |
756 | } |
757 | ||
758 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
759 | *events = zmalloc(*total_size); | |
2f77fc4b | 760 | if (*events == NULL) { |
3c02e545 | 761 | ret = -LTTNG_ERR_FATAL; |
2f77fc4b DG |
762 | goto error; |
763 | } | |
764 | ||
ab4aa612 | 765 | extended_at = ((void *) *events) + |
b4e3ceb9 PP |
766 | nb_event * sizeof(struct lttng_event); |
767 | ||
2f77fc4b DG |
768 | /* Kernel channels */ |
769 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
770 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
771 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
772 | (*events)[i].enabled = event->enabled; | |
00f992f2 JG |
773 | (*events)[i].filter = |
774 | (unsigned char) !!event->filter_expression; | |
2f77fc4b DG |
775 | |
776 | switch (event->event->instrumentation) { | |
777 | case LTTNG_KERNEL_TRACEPOINT: | |
778 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
779 | break; | |
2f77fc4b | 780 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
781 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
782 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
783 | sizeof(struct lttng_kernel_kprobe)); | |
784 | break; | |
785 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
786 | (*events)[i].type = LTTNG_EVENT_PROBE; |
787 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
788 | sizeof(struct lttng_kernel_kprobe)); | |
789 | break; | |
b955b4d4 FD |
790 | case LTTNG_KERNEL_UPROBE: |
791 | (*events)[i].type = LTTNG_EVENT_USERSPACE_PROBE; | |
792 | break; | |
2f77fc4b DG |
793 | case LTTNG_KERNEL_FUNCTION: |
794 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
795 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
796 | sizeof(struct lttng_kernel_function)); | |
797 | break; | |
798 | case LTTNG_KERNEL_NOOP: | |
799 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
800 | break; | |
801 | case LTTNG_KERNEL_SYSCALL: | |
802 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
803 | break; | |
804 | case LTTNG_KERNEL_ALL: | |
1ab8c2ad FD |
805 | /* fall-through. */ |
806 | default: | |
2f77fc4b DG |
807 | assert(0); |
808 | break; | |
809 | } | |
810 | i++; | |
b4e3ceb9 PP |
811 | |
812 | /* Append extended info */ | |
3c02e545 FD |
813 | ret = append_extended_info(event->filter_expression, NULL, |
814 | event->userspace_probe_location, &extended_at); | |
815 | if (ret) { | |
816 | DBG("Error appending extended info message"); | |
817 | ret = -LTTNG_ERR_FATAL; | |
818 | goto error; | |
819 | } | |
2f77fc4b DG |
820 | } |
821 | ||
db906c12 | 822 | end: |
2f77fc4b DG |
823 | return nb_event; |
824 | ||
825 | error: | |
f73fabfd DG |
826 | /* Negate the error code to differentiate the size from an error */ |
827 | return -ret; | |
2f77fc4b DG |
828 | } |
829 | ||
830 | /* | |
831 | * Add URI so the consumer output object. Set the correct path depending on the | |
832 | * domain adding the default trace directory. | |
833 | */ | |
b178f53e JG |
834 | static enum lttng_error_code add_uri_to_consumer( |
835 | const struct ltt_session *session, | |
836 | struct consumer_output *consumer, | |
837 | struct lttng_uri *uri, enum lttng_domain_type domain) | |
2f77fc4b | 838 | { |
b178f53e JG |
839 | int ret; |
840 | enum lttng_error_code ret_code = LTTNG_OK; | |
2f77fc4b DG |
841 | |
842 | assert(uri); | |
843 | ||
844 | if (consumer == NULL) { | |
845 | DBG("No consumer detected. Don't add URI. Stopping."); | |
b178f53e | 846 | ret_code = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
847 | goto error; |
848 | } | |
849 | ||
850 | switch (domain) { | |
851 | case LTTNG_DOMAIN_KERNEL: | |
b178f53e JG |
852 | ret = lttng_strncpy(consumer->domain_subdir, |
853 | DEFAULT_KERNEL_TRACE_DIR, | |
854 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
855 | break; |
856 | case LTTNG_DOMAIN_UST: | |
b178f53e JG |
857 | ret = lttng_strncpy(consumer->domain_subdir, |
858 | DEFAULT_UST_TRACE_DIR, | |
859 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
860 | break; |
861 | default: | |
862 | /* | |
b178f53e JG |
863 | * This case is possible is we try to add the URI to the global |
864 | * tracing session consumer object which in this case there is | |
865 | * no subdir. | |
2f77fc4b | 866 | */ |
b178f53e JG |
867 | memset(consumer->domain_subdir, 0, |
868 | sizeof(consumer->domain_subdir)); | |
869 | ret = 0; | |
870 | } | |
871 | if (ret) { | |
872 | ERR("Failed to initialize consumer output domain subdirectory"); | |
873 | ret_code = LTTNG_ERR_FATAL; | |
874 | goto error; | |
2f77fc4b DG |
875 | } |
876 | ||
877 | switch (uri->dtype) { | |
878 | case LTTNG_DST_IPV4: | |
879 | case LTTNG_DST_IPV6: | |
880 | DBG2("Setting network URI to consumer"); | |
881 | ||
df75acac DG |
882 | if (consumer->type == CONSUMER_DST_NET) { |
883 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
884 | consumer->dst.net.control_isset) || |
885 | (uri->stype == LTTNG_STREAM_DATA && | |
886 | consumer->dst.net.data_isset)) { | |
b178f53e | 887 | ret_code = LTTNG_ERR_URL_EXIST; |
df75acac DG |
888 | goto error; |
889 | } | |
890 | } else { | |
b178f53e | 891 | memset(&consumer->dst, 0, sizeof(consumer->dst)); |
785d2d0d DG |
892 | } |
893 | ||
2f77fc4b | 894 | /* Set URI into consumer output object */ |
b178f53e | 895 | ret = consumer_set_network_uri(session, consumer, uri); |
2f77fc4b | 896 | if (ret < 0) { |
b178f53e | 897 | ret_code = -ret; |
2f77fc4b DG |
898 | goto error; |
899 | } else if (ret == 1) { | |
900 | /* | |
901 | * URI was the same in the consumer so we do not append the subdir | |
902 | * again so to not duplicate output dir. | |
903 | */ | |
b178f53e | 904 | ret_code = LTTNG_OK; |
2f77fc4b DG |
905 | goto error; |
906 | } | |
2f77fc4b DG |
907 | break; |
908 | case LTTNG_DST_PATH: | |
b178f53e JG |
909 | if (*uri->dst.path != '/' || strstr(uri->dst.path, "../")) { |
910 | ret_code = LTTNG_ERR_INVALID; | |
9ac05d92 MD |
911 | goto error; |
912 | } | |
b178f53e JG |
913 | DBG2("Setting trace directory path from URI to %s", |
914 | uri->dst.path); | |
915 | memset(&consumer->dst, 0, sizeof(consumer->dst)); | |
916 | ||
917 | ret = lttng_strncpy(consumer->dst.session_root_path, | |
918 | uri->dst.path, | |
919 | sizeof(consumer->dst.session_root_path)); | |
4df41cad JG |
920 | if (ret) { |
921 | ret_code = LTTNG_ERR_FATAL; | |
922 | goto error; | |
923 | } | |
2f77fc4b DG |
924 | consumer->type = CONSUMER_DST_LOCAL; |
925 | break; | |
926 | } | |
927 | ||
b178f53e | 928 | ret_code = LTTNG_OK; |
2f77fc4b | 929 | error: |
b178f53e | 930 | return ret_code; |
2f77fc4b DG |
931 | } |
932 | ||
933 | /* | |
934 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
935 | */ | |
936 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
937 | { | |
938 | int ret = 0; | |
939 | struct lttng_ht_iter iter; | |
940 | struct consumer_socket *socket; | |
941 | ||
942 | assert(session); | |
943 | ||
e7fe706f DG |
944 | rcu_read_lock(); |
945 | ||
2f77fc4b DG |
946 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
947 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
948 | socket, node.node) { | |
2f77fc4b | 949 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 950 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
951 | pthread_mutex_unlock(socket->lock); |
952 | if (ret < 0) { | |
f73fabfd | 953 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
954 | goto error; |
955 | } | |
956 | } | |
957 | } | |
958 | ||
959 | error: | |
e7fe706f | 960 | rcu_read_unlock(); |
2f77fc4b DG |
961 | return ret; |
962 | } | |
963 | ||
964 | /* | |
965 | * Create a socket to the relayd using the URI. | |
966 | * | |
967 | * On success, the relayd_sock pointer is set to the created socket. | |
9a654598 | 968 | * Else, it remains untouched and an LTTng error code is returned. |
2f77fc4b | 969 | */ |
9a654598 | 970 | static enum lttng_error_code create_connect_relayd(struct lttng_uri *uri, |
b31610f2 JD |
971 | struct lttcomm_relayd_sock **relayd_sock, |
972 | struct consumer_output *consumer) | |
2f77fc4b DG |
973 | { |
974 | int ret; | |
9a654598 | 975 | enum lttng_error_code status = LTTNG_OK; |
6151a90f | 976 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 977 | |
6151a90f JD |
978 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
979 | RELAYD_VERSION_COMM_MINOR); | |
980 | if (!rsock) { | |
9a654598 | 981 | status = LTTNG_ERR_FATAL; |
2f77fc4b DG |
982 | goto error; |
983 | } | |
984 | ||
ffe60014 DG |
985 | /* |
986 | * Connect to relayd so we can proceed with a session creation. This call | |
987 | * can possibly block for an arbitrary amount of time to set the health | |
988 | * state to be in poll execution. | |
989 | */ | |
990 | health_poll_entry(); | |
6151a90f | 991 | ret = relayd_connect(rsock); |
ffe60014 | 992 | health_poll_exit(); |
2f77fc4b DG |
993 | if (ret < 0) { |
994 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 995 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
996 | goto free_sock; |
997 | } | |
998 | ||
999 | /* Create socket for control stream. */ | |
1000 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
eacb7b6f MD |
1001 | uint64_t result_flags; |
1002 | ||
2f77fc4b DG |
1003 | DBG3("Creating relayd stream socket from URI"); |
1004 | ||
1005 | /* Check relayd version */ | |
6151a90f | 1006 | ret = relayd_version_check(rsock); |
67d5aa28 | 1007 | if (ret == LTTNG_ERR_RELAYD_VERSION_FAIL) { |
9a654598 | 1008 | status = LTTNG_ERR_RELAYD_VERSION_FAIL; |
67d5aa28 JD |
1009 | goto close_sock; |
1010 | } else if (ret < 0) { | |
1011 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 1012 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
1013 | goto close_sock; |
1014 | } | |
b31610f2 JD |
1015 | consumer->relay_major_version = rsock->major; |
1016 | consumer->relay_minor_version = rsock->minor; | |
eacb7b6f MD |
1017 | ret = relayd_get_configuration(rsock, 0, |
1018 | &result_flags); | |
1019 | if (ret < 0) { | |
1020 | ERR("Unable to get relayd configuration"); | |
1021 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; | |
1022 | goto close_sock; | |
1023 | } | |
1024 | if (result_flags & LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED) { | |
1025 | consumer->relay_allows_clear = true; | |
1026 | } | |
2f77fc4b DG |
1027 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
1028 | DBG3("Creating relayd data socket from URI"); | |
1029 | } else { | |
1030 | /* Command is not valid */ | |
1031 | ERR("Relayd invalid stream type: %d", uri->stype); | |
9a654598 | 1032 | status = LTTNG_ERR_INVALID; |
2f77fc4b DG |
1033 | goto close_sock; |
1034 | } | |
1035 | ||
6151a90f | 1036 | *relayd_sock = rsock; |
2f77fc4b | 1037 | |
9a654598 | 1038 | return status; |
2f77fc4b DG |
1039 | |
1040 | close_sock: | |
6151a90f JD |
1041 | /* The returned value is not useful since we are on an error path. */ |
1042 | (void) relayd_close(rsock); | |
2f77fc4b | 1043 | free_sock: |
6151a90f | 1044 | free(rsock); |
2f77fc4b | 1045 | error: |
9a654598 | 1046 | return status; |
2f77fc4b DG |
1047 | } |
1048 | ||
1049 | /* | |
1050 | * Connect to the relayd using URI and send the socket to the right consumer. | |
43fade62 JG |
1051 | * |
1052 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1053 | * |
1054 | * Returns LTTNG_OK on success or an LTTng error code on failure. | |
2f77fc4b | 1055 | */ |
9a654598 JG |
1056 | static enum lttng_error_code send_consumer_relayd_socket( |
1057 | unsigned int session_id, | |
3044f922 | 1058 | struct lttng_uri *relayd_uri, |
56a37563 | 1059 | struct consumer_output *consumer, |
d3e2ba59 | 1060 | struct consumer_socket *consumer_sock, |
fb9a95c4 | 1061 | const char *session_name, const char *hostname, |
6fa5fe7c | 1062 | const char *base_path, int session_live_timer, |
db1da059 | 1063 | const uint64_t *current_chunk_id, |
46ef2188 MD |
1064 | time_t session_creation_time, |
1065 | bool session_name_contains_creation_time) | |
2f77fc4b DG |
1066 | { |
1067 | int ret; | |
6151a90f | 1068 | struct lttcomm_relayd_sock *rsock = NULL; |
9a654598 | 1069 | enum lttng_error_code status; |
2f77fc4b | 1070 | |
ffe60014 | 1071 | /* Connect to relayd and make version check if uri is the control. */ |
9a654598 JG |
1072 | status = create_connect_relayd(relayd_uri, &rsock, consumer); |
1073 | if (status != LTTNG_OK) { | |
9e218353 | 1074 | goto relayd_comm_error; |
ffe60014 | 1075 | } |
6151a90f | 1076 | assert(rsock); |
ffe60014 | 1077 | |
2f77fc4b | 1078 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
1079 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
1080 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
1081 | /* |
1082 | * Increment net_seq_idx because we are about to transfer the | |
1083 | * new relayd socket to the consumer. | |
d88aee68 | 1084 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 1085 | */ |
d88aee68 DG |
1086 | consumer->net_seq_index = ++relayd_net_seq_idx; |
1087 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
1088 | } |
1089 | ||
2f77fc4b | 1090 | /* Send relayd socket to consumer. */ |
6151a90f | 1091 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 | 1092 | relayd_uri->stype, session_id, |
6fa5fe7c MD |
1093 | session_name, hostname, base_path, |
1094 | session_live_timer, current_chunk_id, | |
46ef2188 | 1095 | session_creation_time, session_name_contains_creation_time); |
2f77fc4b | 1096 | if (ret < 0) { |
9a654598 | 1097 | status = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
1098 | goto close_sock; |
1099 | } | |
1100 | ||
c890b720 DG |
1101 | /* Flag that the corresponding socket was sent. */ |
1102 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 1103 | consumer_sock->control_sock_sent = 1; |
c890b720 | 1104 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 1105 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
1106 | } |
1107 | ||
2f77fc4b DG |
1108 | /* |
1109 | * Close socket which was dup on the consumer side. The session daemon does | |
1110 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
1111 | */ | |
1112 | ||
1113 | close_sock: | |
9a654598 | 1114 | if (status != LTTNG_OK) { |
ffe60014 | 1115 | /* |
d9078d0c DG |
1116 | * The consumer output for this session should not be used anymore |
1117 | * since the relayd connection failed thus making any tracing or/and | |
1118 | * streaming not usable. | |
ffe60014 | 1119 | */ |
d9078d0c | 1120 | consumer->enabled = 0; |
ffe60014 | 1121 | } |
9e218353 JR |
1122 | (void) relayd_close(rsock); |
1123 | free(rsock); | |
1124 | ||
1125 | relayd_comm_error: | |
9a654598 | 1126 | return status; |
2f77fc4b DG |
1127 | } |
1128 | ||
1129 | /* | |
1130 | * Send both relayd sockets to a specific consumer and domain. This is a | |
1131 | * helper function to facilitate sending the information to the consumer for a | |
1132 | * session. | |
43fade62 JG |
1133 | * |
1134 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1135 | * |
1136 | * Returns LTTNG_OK, or an LTTng error code on failure. | |
2f77fc4b | 1137 | */ |
9a654598 JG |
1138 | static enum lttng_error_code send_consumer_relayd_sockets( |
1139 | enum lttng_domain_type domain, | |
56a37563 | 1140 | unsigned int session_id, struct consumer_output *consumer, |
fb9a95c4 | 1141 | struct consumer_socket *sock, const char *session_name, |
6fa5fe7c | 1142 | const char *hostname, const char *base_path, int session_live_timer, |
46ef2188 MD |
1143 | const uint64_t *current_chunk_id, time_t session_creation_time, |
1144 | bool session_name_contains_creation_time) | |
2f77fc4b | 1145 | { |
9a654598 | 1146 | enum lttng_error_code status = LTTNG_OK; |
2f77fc4b | 1147 | |
2f77fc4b | 1148 | assert(consumer); |
6dc3064a | 1149 | assert(sock); |
2f77fc4b | 1150 | |
2f77fc4b | 1151 | /* Sending control relayd socket. */ |
ffe60014 | 1152 | if (!sock->control_sock_sent) { |
9a654598 | 1153 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1154 | &consumer->dst.net.control, consumer, sock, |
6fa5fe7c | 1155 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1156 | current_chunk_id, session_creation_time, |
1157 | session_name_contains_creation_time); | |
9a654598 | 1158 | if (status != LTTNG_OK) { |
c890b720 DG |
1159 | goto error; |
1160 | } | |
2f77fc4b DG |
1161 | } |
1162 | ||
1163 | /* Sending data relayd socket. */ | |
ffe60014 | 1164 | if (!sock->data_sock_sent) { |
9a654598 | 1165 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1166 | &consumer->dst.net.data, consumer, sock, |
6fa5fe7c | 1167 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1168 | current_chunk_id, session_creation_time, |
1169 | session_name_contains_creation_time); | |
9a654598 | 1170 | if (status != LTTNG_OK) { |
c890b720 DG |
1171 | goto error; |
1172 | } | |
2f77fc4b DG |
1173 | } |
1174 | ||
2f77fc4b | 1175 | error: |
9a654598 | 1176 | return status; |
2f77fc4b DG |
1177 | } |
1178 | ||
1179 | /* | |
1180 | * Setup relayd connections for a tracing session. First creates the socket to | |
1181 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
1182 | * network. | |
1183 | */ | |
ffe60014 | 1184 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 1185 | { |
f73fabfd | 1186 | int ret = LTTNG_OK; |
2f77fc4b DG |
1187 | struct ltt_ust_session *usess; |
1188 | struct ltt_kernel_session *ksess; | |
1189 | struct consumer_socket *socket; | |
1190 | struct lttng_ht_iter iter; | |
1e791a74 | 1191 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
2f77fc4b | 1192 | |
1e791a74 | 1193 | assert(session); |
2f77fc4b DG |
1194 | |
1195 | usess = session->ust_session; | |
1196 | ksess = session->kernel_session; | |
1197 | ||
785d2d0d | 1198 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1199 | |
aa997ea3 | 1200 | rcu_read_lock(); |
1e791a74 JG |
1201 | if (session->current_trace_chunk) { |
1202 | enum lttng_trace_chunk_status status = lttng_trace_chunk_get_id( | |
1203 | session->current_trace_chunk, ¤t_chunk_id.value); | |
1204 | ||
1205 | if (status == LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1206 | current_chunk_id.is_set = true; | |
1207 | } else { | |
1208 | ERR("Failed to get current trace chunk id"); | |
1209 | ret = LTTNG_ERR_UNK; | |
1210 | goto error; | |
1211 | } | |
1212 | } | |
1213 | ||
2f77fc4b DG |
1214 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
1215 | && usess->consumer->enabled) { | |
1216 | /* For each consumer socket, send relayd sockets */ | |
1217 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
1218 | socket, node.node) { | |
2f77fc4b | 1219 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1220 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
1221 | usess->consumer, socket, |
1222 | session->name, session->hostname, | |
6fa5fe7c | 1223 | session->base_path, |
1e791a74 | 1224 | session->live_timer, |
db1da059 | 1225 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1226 | session->creation_time, |
1227 | session->name_contains_creation_time); | |
2f77fc4b | 1228 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1229 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1230 | goto error; |
1231 | } | |
6dc3064a DG |
1232 | /* Session is now ready for network streaming. */ |
1233 | session->net_handle = 1; | |
2f77fc4b | 1234 | } |
b31610f2 JD |
1235 | session->consumer->relay_major_version = |
1236 | usess->consumer->relay_major_version; | |
1237 | session->consumer->relay_minor_version = | |
1238 | usess->consumer->relay_minor_version; | |
eacb7b6f MD |
1239 | session->consumer->relay_allows_clear = |
1240 | usess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1241 | } |
1242 | ||
1243 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
1244 | && ksess->consumer->enabled) { | |
1245 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
1246 | socket, node.node) { | |
2f77fc4b | 1247 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1248 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
1249 | ksess->consumer, socket, |
1250 | session->name, session->hostname, | |
6fa5fe7c | 1251 | session->base_path, |
1e791a74 | 1252 | session->live_timer, |
db1da059 | 1253 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1254 | session->creation_time, |
1255 | session->name_contains_creation_time); | |
2f77fc4b | 1256 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1257 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1258 | goto error; |
1259 | } | |
6dc3064a DG |
1260 | /* Session is now ready for network streaming. */ |
1261 | session->net_handle = 1; | |
2f77fc4b | 1262 | } |
b31610f2 JD |
1263 | session->consumer->relay_major_version = |
1264 | ksess->consumer->relay_major_version; | |
1265 | session->consumer->relay_minor_version = | |
1266 | ksess->consumer->relay_minor_version; | |
eacb7b6f MD |
1267 | session->consumer->relay_allows_clear = |
1268 | ksess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1269 | } |
1270 | ||
1271 | error: | |
e7fe706f | 1272 | rcu_read_unlock(); |
2f77fc4b DG |
1273 | return ret; |
1274 | } | |
1275 | ||
9b6c7ec5 DG |
1276 | /* |
1277 | * Start a kernel session by opening all necessary streams. | |
1278 | */ | |
4dbe1875 | 1279 | int start_kernel_session(struct ltt_kernel_session *ksess) |
9b6c7ec5 DG |
1280 | { |
1281 | int ret; | |
1282 | struct ltt_kernel_channel *kchan; | |
1283 | ||
1284 | /* Open kernel metadata */ | |
07b86b52 | 1285 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
1286 | ret = kernel_open_metadata(ksess); |
1287 | if (ret < 0) { | |
1288 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1289 | goto error; | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | /* Open kernel metadata stream */ | |
07b86b52 | 1294 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1295 | ret = kernel_open_metadata_stream(ksess); |
1296 | if (ret < 0) { | |
1297 | ERR("Kernel create metadata stream failed"); | |
1298 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1299 | goto error; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* For each channel */ | |
1304 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1305 | if (kchan->stream_count == 0) { | |
1306 | ret = kernel_open_channel_stream(kchan); | |
1307 | if (ret < 0) { | |
1308 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1309 | goto error; | |
1310 | } | |
1311 | /* Update the stream global counter */ | |
1312 | ksess->stream_count_global += ret; | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | /* Setup kernel consumer socket and send fds to it */ | |
1317 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1318 | if (ret != 0) { |
9b6c7ec5 DG |
1319 | ret = LTTNG_ERR_KERN_START_FAIL; |
1320 | goto error; | |
1321 | } | |
1322 | ||
1323 | /* This start the kernel tracing */ | |
1324 | ret = kernel_start_session(ksess); | |
1325 | if (ret < 0) { | |
1326 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1327 | goto error; | |
1328 | } | |
1329 | ||
1330 | /* Quiescent wait after starting trace */ | |
7d268848 | 1331 | kernel_wait_quiescent(); |
9b6c7ec5 | 1332 | |
14fb1ebe | 1333 | ksess->active = 1; |
9b6c7ec5 DG |
1334 | |
1335 | ret = LTTNG_OK; | |
1336 | ||
1337 | error: | |
1338 | return ret; | |
1339 | } | |
1340 | ||
4dbe1875 MD |
1341 | int stop_kernel_session(struct ltt_kernel_session *ksess) |
1342 | { | |
1343 | struct ltt_kernel_channel *kchan; | |
1344 | bool error_occurred = false; | |
1345 | int ret; | |
1346 | ||
1347 | if (!ksess || !ksess->active) { | |
1348 | return LTTNG_OK; | |
1349 | } | |
1350 | DBG("Stopping kernel tracing"); | |
1351 | ||
1352 | ret = kernel_stop_session(ksess); | |
1353 | if (ret < 0) { | |
1354 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1355 | goto error; | |
1356 | } | |
1357 | ||
1358 | kernel_wait_quiescent(); | |
1359 | ||
1360 | /* Flush metadata after stopping (if exists) */ | |
1361 | if (ksess->metadata_stream_fd >= 0) { | |
1362 | ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd); | |
1363 | if (ret < 0) { | |
1364 | ERR("Kernel metadata flush failed"); | |
1365 | error_occurred = true; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | /* Flush all buffers after stopping */ | |
1370 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1371 | ret = kernel_flush_buffer(kchan); | |
1372 | if (ret < 0) { | |
1373 | ERR("Kernel flush buffer error"); | |
1374 | error_occurred = true; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | ksess->active = 0; | |
1379 | if (error_occurred) { | |
1380 | ret = LTTNG_ERR_UNK; | |
1381 | } else { | |
1382 | ret = LTTNG_OK; | |
1383 | } | |
1384 | error: | |
1385 | return ret; | |
1386 | } | |
1387 | ||
2f77fc4b DG |
1388 | /* |
1389 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1390 | */ | |
56a37563 JG |
1391 | int cmd_disable_channel(struct ltt_session *session, |
1392 | enum lttng_domain_type domain, char *channel_name) | |
2f77fc4b DG |
1393 | { |
1394 | int ret; | |
1395 | struct ltt_ust_session *usess; | |
1396 | ||
1397 | usess = session->ust_session; | |
1398 | ||
2223c96f DG |
1399 | rcu_read_lock(); |
1400 | ||
2f77fc4b DG |
1401 | switch (domain) { |
1402 | case LTTNG_DOMAIN_KERNEL: | |
1403 | { | |
1404 | ret = channel_kernel_disable(session->kernel_session, | |
1405 | channel_name); | |
f73fabfd | 1406 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1407 | goto error; |
1408 | } | |
1409 | ||
7d268848 | 1410 | kernel_wait_quiescent(); |
2f77fc4b DG |
1411 | break; |
1412 | } | |
1413 | case LTTNG_DOMAIN_UST: | |
1414 | { | |
1415 | struct ltt_ust_channel *uchan; | |
1416 | struct lttng_ht *chan_ht; | |
1417 | ||
1418 | chan_ht = usess->domain_global.channels; | |
1419 | ||
1420 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
1421 | if (uchan == NULL) { | |
f73fabfd | 1422 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1423 | goto error; |
1424 | } | |
1425 | ||
7972aab2 | 1426 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1427 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1428 | goto error; |
1429 | } | |
1430 | break; | |
1431 | } | |
2f77fc4b | 1432 | default: |
f73fabfd | 1433 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1434 | goto error; |
1435 | } | |
1436 | ||
f73fabfd | 1437 | ret = LTTNG_OK; |
2f77fc4b DG |
1438 | |
1439 | error: | |
2223c96f | 1440 | rcu_read_unlock(); |
2f77fc4b DG |
1441 | return ret; |
1442 | } | |
1443 | ||
1444 | /* | |
1445 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1446 | * | |
1447 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1448 | */ | |
1449 | int cmd_enable_channel(struct ltt_session *session, | |
df4f5a87 | 1450 | const struct lttng_domain *domain, const struct lttng_channel *_attr, int wpipe) |
2f77fc4b DG |
1451 | { |
1452 | int ret; | |
1453 | struct ltt_ust_session *usess = session->ust_session; | |
1454 | struct lttng_ht *chan_ht; | |
1f345e94 | 1455 | size_t len; |
df4f5a87 | 1456 | struct lttng_channel attr; |
2f77fc4b DG |
1457 | |
1458 | assert(session); | |
df4f5a87 | 1459 | assert(_attr); |
7972aab2 | 1460 | assert(domain); |
2f77fc4b | 1461 | |
df4f5a87 JG |
1462 | attr = *_attr; |
1463 | len = lttng_strnlen(attr.name, sizeof(attr.name)); | |
1f345e94 PP |
1464 | |
1465 | /* Validate channel name */ | |
df4f5a87 JG |
1466 | if (attr.name[0] == '.' || |
1467 | memchr(attr.name, '/', len) != NULL) { | |
1f345e94 PP |
1468 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; |
1469 | goto end; | |
1470 | } | |
1471 | ||
df4f5a87 | 1472 | DBG("Enabling channel %s for session %s", attr.name, session->name); |
2f77fc4b | 1473 | |
03b4fdcf DG |
1474 | rcu_read_lock(); |
1475 | ||
ecc48a90 JD |
1476 | /* |
1477 | * Don't try to enable a channel if the session has been started at | |
1478 | * some point in time before. The tracer does not allow it. | |
1479 | */ | |
8382cf6f | 1480 | if (session->has_been_started) { |
ecc48a90 JD |
1481 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1482 | goto error; | |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * If the session is a live session, remove the switch timer, the | |
1487 | * live timer does the same thing but sends also synchronisation | |
1488 | * beacons for inactive streams. | |
1489 | */ | |
1490 | if (session->live_timer > 0) { | |
df4f5a87 JG |
1491 | attr.attr.live_timer_interval = session->live_timer; |
1492 | attr.attr.switch_timer_interval = 0; | |
ecc48a90 JD |
1493 | } |
1494 | ||
6e21424e JR |
1495 | /* Check for feature support */ |
1496 | switch (domain->type) { | |
1497 | case LTTNG_DOMAIN_KERNEL: | |
1498 | { | |
7d268848 | 1499 | if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) { |
6e21424e JR |
1500 | /* Sampling position of buffer is not supported */ |
1501 | WARN("Kernel tracer does not support buffer monitoring. " | |
1502 | "Setting the monitor interval timer to 0 " | |
1503 | "(disabled) for channel '%s' of session '%s'", | |
df4f5a87 JG |
1504 | attr.name, session->name); |
1505 | lttng_channel_set_monitor_timer_interval(&attr, 0); | |
6e21424e JR |
1506 | } |
1507 | break; | |
1508 | } | |
1509 | case LTTNG_DOMAIN_UST: | |
f28f9e44 | 1510 | break; |
6e21424e JR |
1511 | case LTTNG_DOMAIN_JUL: |
1512 | case LTTNG_DOMAIN_LOG4J: | |
1513 | case LTTNG_DOMAIN_PYTHON: | |
f28f9e44 JG |
1514 | if (!agent_tracing_is_enabled()) { |
1515 | DBG("Attempted to enable a channel in an agent domain but the agent thread is not running"); | |
1516 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
1517 | goto error; | |
1518 | } | |
6e21424e JR |
1519 | break; |
1520 | default: | |
1521 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1522 | goto error; | |
1523 | } | |
1524 | ||
7972aab2 | 1525 | switch (domain->type) { |
2f77fc4b DG |
1526 | case LTTNG_DOMAIN_KERNEL: |
1527 | { | |
1528 | struct ltt_kernel_channel *kchan; | |
1529 | ||
df4f5a87 | 1530 | kchan = trace_kernel_get_channel_by_name(attr.name, |
2f77fc4b DG |
1531 | session->kernel_session); |
1532 | if (kchan == NULL) { | |
54213acc JG |
1533 | if (session->snapshot.nb_output > 0 || |
1534 | session->snapshot_mode) { | |
1535 | /* Enforce mmap output for snapshot sessions. */ | |
df4f5a87 | 1536 | attr.attr.output = LTTNG_EVENT_MMAP; |
54213acc | 1537 | } |
df4f5a87 JG |
1538 | ret = channel_kernel_create(session->kernel_session, &attr, wpipe); |
1539 | if (attr.name[0] != '\0') { | |
85076754 MD |
1540 | session->kernel_session->has_non_default_channel = 1; |
1541 | } | |
2f77fc4b DG |
1542 | } else { |
1543 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1544 | } | |
1545 | ||
f73fabfd | 1546 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1547 | goto error; |
1548 | } | |
1549 | ||
7d268848 | 1550 | kernel_wait_quiescent(); |
2f77fc4b DG |
1551 | break; |
1552 | } | |
1553 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1554 | case LTTNG_DOMAIN_JUL: |
1555 | case LTTNG_DOMAIN_LOG4J: | |
1556 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1557 | { |
1558 | struct ltt_ust_channel *uchan; | |
1559 | ||
9232818f JG |
1560 | /* |
1561 | * FIXME | |
1562 | * | |
1563 | * Current agent implementation limitations force us to allow | |
1564 | * only one channel at once in "agent" subdomains. Each | |
1565 | * subdomain has a default channel name which must be strictly | |
1566 | * adhered to. | |
1567 | */ | |
1568 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
df4f5a87 | 1569 | if (strncmp(attr.name, DEFAULT_JUL_CHANNEL_NAME, |
9232818f JG |
1570 | LTTNG_SYMBOL_NAME_LEN)) { |
1571 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1572 | goto error; | |
1573 | } | |
1574 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
df4f5a87 | 1575 | if (strncmp(attr.name, DEFAULT_LOG4J_CHANNEL_NAME, |
9232818f JG |
1576 | LTTNG_SYMBOL_NAME_LEN)) { |
1577 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1578 | goto error; | |
1579 | } | |
1580 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
df4f5a87 | 1581 | if (strncmp(attr.name, DEFAULT_PYTHON_CHANNEL_NAME, |
9232818f JG |
1582 | LTTNG_SYMBOL_NAME_LEN)) { |
1583 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1584 | goto error; | |
1585 | } | |
1586 | } | |
1587 | ||
2f77fc4b DG |
1588 | chan_ht = usess->domain_global.channels; |
1589 | ||
df4f5a87 | 1590 | uchan = trace_ust_find_channel_by_name(chan_ht, attr.name); |
2f77fc4b | 1591 | if (uchan == NULL) { |
df4f5a87 JG |
1592 | ret = channel_ust_create(usess, &attr, domain->buf_type); |
1593 | if (attr.name[0] != '\0') { | |
85076754 MD |
1594 | usess->has_non_default_channel = 1; |
1595 | } | |
2f77fc4b | 1596 | } else { |
7972aab2 | 1597 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1598 | } |
1599 | break; | |
1600 | } | |
2f77fc4b | 1601 | default: |
f73fabfd | 1602 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1603 | goto error; |
1604 | } | |
1605 | ||
df4f5a87 | 1606 | if (ret == LTTNG_OK && attr.attr.output != LTTNG_EVENT_MMAP) { |
54213acc JG |
1607 | session->has_non_mmap_channel = true; |
1608 | } | |
2f77fc4b | 1609 | error: |
2223c96f | 1610 | rcu_read_unlock(); |
1f345e94 | 1611 | end: |
2f77fc4b DG |
1612 | return ret; |
1613 | } | |
1614 | ||
159b042f JG |
1615 | enum lttng_error_code cmd_process_attr_tracker_get_tracking_policy( |
1616 | struct ltt_session *session, | |
1617 | enum lttng_domain_type domain, | |
1618 | enum lttng_process_attr process_attr, | |
1619 | enum lttng_tracking_policy *policy) | |
1620 | { | |
1621 | enum lttng_error_code ret_code = LTTNG_OK; | |
1622 | const struct process_attr_tracker *tracker; | |
1623 | ||
1624 | switch (domain) { | |
1625 | case LTTNG_DOMAIN_KERNEL: | |
1626 | if (!session->kernel_session) { | |
1627 | ret_code = LTTNG_ERR_INVALID; | |
1628 | goto end; | |
1629 | } | |
1630 | tracker = kernel_get_process_attr_tracker( | |
1631 | session->kernel_session, process_attr); | |
1632 | break; | |
1633 | case LTTNG_DOMAIN_UST: | |
1634 | if (!session->ust_session) { | |
1635 | ret_code = LTTNG_ERR_INVALID; | |
1636 | goto end; | |
1637 | } | |
1638 | tracker = trace_ust_get_process_attr_tracker( | |
1639 | session->ust_session, process_attr); | |
1640 | break; | |
1641 | default: | |
1642 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1643 | goto end; | |
1644 | } | |
1645 | if (tracker) { | |
1646 | *policy = process_attr_tracker_get_tracking_policy(tracker); | |
1647 | } else { | |
1648 | ret_code = LTTNG_ERR_INVALID; | |
1649 | } | |
1650 | end: | |
1651 | return ret_code; | |
1652 | } | |
1653 | ||
1654 | enum lttng_error_code cmd_process_attr_tracker_set_tracking_policy( | |
1655 | struct ltt_session *session, | |
1656 | enum lttng_domain_type domain, | |
1657 | enum lttng_process_attr process_attr, | |
1658 | enum lttng_tracking_policy policy) | |
1659 | { | |
1660 | enum lttng_error_code ret_code = LTTNG_OK; | |
1661 | ||
1662 | switch (policy) { | |
1663 | case LTTNG_TRACKING_POLICY_INCLUDE_SET: | |
1664 | case LTTNG_TRACKING_POLICY_EXCLUDE_ALL: | |
1665 | case LTTNG_TRACKING_POLICY_INCLUDE_ALL: | |
1666 | break; | |
1667 | default: | |
1668 | ret_code = LTTNG_ERR_INVALID; | |
1669 | goto end; | |
1670 | } | |
1671 | ||
1672 | switch (domain) { | |
1673 | case LTTNG_DOMAIN_KERNEL: | |
1674 | if (!session->kernel_session) { | |
1675 | ret_code = LTTNG_ERR_INVALID; | |
1676 | goto end; | |
1677 | } | |
1678 | ret_code = kernel_process_attr_tracker_set_tracking_policy( | |
1679 | session->kernel_session, process_attr, policy); | |
1680 | break; | |
1681 | case LTTNG_DOMAIN_UST: | |
1682 | if (!session->ust_session) { | |
1683 | ret_code = LTTNG_ERR_INVALID; | |
1684 | goto end; | |
1685 | } | |
1686 | ret_code = trace_ust_process_attr_tracker_set_tracking_policy( | |
1687 | session->ust_session, process_attr, policy); | |
1688 | break; | |
1689 | default: | |
1690 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1691 | break; | |
1692 | } | |
1693 | end: | |
1694 | return ret_code; | |
1695 | } | |
1696 | ||
1697 | enum lttng_error_code cmd_process_attr_tracker_inclusion_set_add_value( | |
1698 | struct ltt_session *session, | |
1699 | enum lttng_domain_type domain, | |
1700 | enum lttng_process_attr process_attr, | |
1701 | const struct process_attr_value *value) | |
1702 | { | |
1703 | enum lttng_error_code ret_code = LTTNG_OK; | |
1704 | ||
1705 | switch (domain) { | |
1706 | case LTTNG_DOMAIN_KERNEL: | |
1707 | if (!session->kernel_session) { | |
1708 | ret_code = LTTNG_ERR_INVALID; | |
1709 | goto end; | |
1710 | } | |
1711 | ret_code = kernel_process_attr_tracker_inclusion_set_add_value( | |
1712 | session->kernel_session, process_attr, value); | |
1713 | break; | |
1714 | case LTTNG_DOMAIN_UST: | |
1715 | if (!session->ust_session) { | |
1716 | ret_code = LTTNG_ERR_INVALID; | |
1717 | goto end; | |
1718 | } | |
1719 | ret_code = trace_ust_process_attr_tracker_inclusion_set_add_value( | |
1720 | session->ust_session, process_attr, value); | |
1721 | break; | |
1722 | default: | |
1723 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1724 | break; | |
1725 | } | |
1726 | end: | |
1727 | return ret_code; | |
1728 | } | |
1729 | ||
1730 | enum lttng_error_code cmd_process_attr_tracker_inclusion_set_remove_value( | |
1731 | struct ltt_session *session, | |
1732 | enum lttng_domain_type domain, | |
1733 | enum lttng_process_attr process_attr, | |
1734 | const struct process_attr_value *value) | |
1735 | { | |
1736 | enum lttng_error_code ret_code = LTTNG_OK; | |
1737 | ||
1738 | switch (domain) { | |
1739 | case LTTNG_DOMAIN_KERNEL: | |
1740 | if (!session->kernel_session) { | |
1741 | ret_code = LTTNG_ERR_INVALID; | |
1742 | goto end; | |
1743 | } | |
1744 | ret_code = kernel_process_attr_tracker_inclusion_set_remove_value( | |
1745 | session->kernel_session, process_attr, value); | |
1746 | break; | |
1747 | case LTTNG_DOMAIN_UST: | |
1748 | if (!session->ust_session) { | |
1749 | ret_code = LTTNG_ERR_INVALID; | |
1750 | goto end; | |
1751 | } | |
1752 | ret_code = trace_ust_process_attr_tracker_inclusion_set_remove_value( | |
1753 | session->ust_session, process_attr, value); | |
1754 | break; | |
1755 | default: | |
1756 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1757 | break; | |
1758 | } | |
1759 | end: | |
1760 | return ret_code; | |
1761 | } | |
1762 | ||
1763 | enum lttng_error_code cmd_process_attr_tracker_get_inclusion_set( | |
1764 | struct ltt_session *session, | |
1765 | enum lttng_domain_type domain, | |
1766 | enum lttng_process_attr process_attr, | |
1767 | struct lttng_process_attr_values **values) | |
1768 | { | |
1769 | enum lttng_error_code ret_code = LTTNG_OK; | |
1770 | const struct process_attr_tracker *tracker; | |
1771 | enum process_attr_tracker_status status; | |
1772 | ||
1773 | switch (domain) { | |
1774 | case LTTNG_DOMAIN_KERNEL: | |
1775 | if (!session->kernel_session) { | |
1776 | ret_code = LTTNG_ERR_INVALID; | |
1777 | goto end; | |
1778 | } | |
1779 | tracker = kernel_get_process_attr_tracker( | |
1780 | session->kernel_session, process_attr); | |
1781 | break; | |
1782 | case LTTNG_DOMAIN_UST: | |
1783 | if (!session->ust_session) { | |
1784 | ret_code = LTTNG_ERR_INVALID; | |
1785 | goto end; | |
1786 | } | |
1787 | tracker = trace_ust_get_process_attr_tracker( | |
1788 | session->ust_session, process_attr); | |
1789 | break; | |
1790 | default: | |
1791 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1792 | goto end; | |
1793 | } | |
1794 | ||
1795 | if (!tracker) { | |
1796 | ret_code = LTTNG_ERR_INVALID; | |
1797 | goto end; | |
1798 | } | |
1799 | ||
1800 | status = process_attr_tracker_get_inclusion_set(tracker, values); | |
1801 | switch (status) { | |
1802 | case PROCESS_ATTR_TRACKER_STATUS_OK: | |
1803 | ret_code = LTTNG_OK; | |
1804 | break; | |
1805 | case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY: | |
1806 | ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY; | |
1807 | break; | |
1808 | case PROCESS_ATTR_TRACKER_STATUS_ERROR: | |
1809 | ret_code = LTTNG_ERR_NOMEM; | |
1810 | break; | |
1811 | default: | |
1812 | ret_code = LTTNG_ERR_UNK; | |
1813 | break; | |
1814 | } | |
1815 | ||
1816 | end: | |
1817 | return ret_code; | |
1818 | } | |
1819 | ||
2f77fc4b DG |
1820 | /* |
1821 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1822 | */ | |
56a37563 | 1823 | int cmd_disable_event(struct ltt_session *session, |
df4f5a87 JG |
1824 | enum lttng_domain_type domain, const char *channel_name, |
1825 | const struct lttng_event *event) | |
2f77fc4b DG |
1826 | { |
1827 | int ret; | |
df4f5a87 | 1828 | const char *event_name; |
6e911cad | 1829 | |
18a720cd MD |
1830 | DBG("Disable event command for event \'%s\'", event->name); |
1831 | ||
6e911cad MD |
1832 | event_name = event->name; |
1833 | ||
9b7431cf JG |
1834 | /* Error out on unhandled search criteria */ |
1835 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad | 1836 | || event->pid || event->filter || event->exclusion) { |
7076b56e JG |
1837 | ret = LTTNG_ERR_UNK; |
1838 | goto error; | |
6e911cad | 1839 | } |
2f77fc4b | 1840 | |
2223c96f DG |
1841 | rcu_read_lock(); |
1842 | ||
2f77fc4b DG |
1843 | switch (domain) { |
1844 | case LTTNG_DOMAIN_KERNEL: | |
1845 | { | |
1846 | struct ltt_kernel_channel *kchan; | |
1847 | struct ltt_kernel_session *ksess; | |
1848 | ||
1849 | ksess = session->kernel_session; | |
1850 | ||
85076754 MD |
1851 | /* |
1852 | * If a non-default channel has been created in the | |
1853 | * session, explicitely require that -c chan_name needs | |
1854 | * to be provided. | |
1855 | */ | |
1856 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1857 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1858 | goto error_unlock; |
85076754 MD |
1859 | } |
1860 | ||
2f77fc4b DG |
1861 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1862 | if (kchan == NULL) { | |
f73fabfd | 1863 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1864 | goto error_unlock; |
2f77fc4b DG |
1865 | } |
1866 | ||
6e911cad MD |
1867 | switch (event->type) { |
1868 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1869 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1870 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1871 | case LTTNG_EVENT_PROBE: |
1872 | case LTTNG_EVENT_FUNCTION: | |
1873 | case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ | |
1874 | if (event_name[0] == '\0') { | |
1875 | ret = event_kernel_disable_event(kchan, | |
1876 | NULL, event->type); | |
29c62722 | 1877 | } else { |
d0ae4ea8 | 1878 | ret = event_kernel_disable_event(kchan, |
9550ee81 | 1879 | event_name, event->type); |
29c62722 | 1880 | } |
6e911cad | 1881 | if (ret != LTTNG_OK) { |
7076b56e | 1882 | goto error_unlock; |
6e911cad MD |
1883 | } |
1884 | break; | |
6e911cad MD |
1885 | default: |
1886 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1887 | goto error_unlock; |
2f77fc4b DG |
1888 | } |
1889 | ||
7d268848 | 1890 | kernel_wait_quiescent(); |
2f77fc4b DG |
1891 | break; |
1892 | } | |
1893 | case LTTNG_DOMAIN_UST: | |
1894 | { | |
1895 | struct ltt_ust_channel *uchan; | |
1896 | struct ltt_ust_session *usess; | |
1897 | ||
1898 | usess = session->ust_session; | |
1899 | ||
7076b56e JG |
1900 | if (validate_ust_event_name(event_name)) { |
1901 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1902 | goto error_unlock; | |
1903 | } | |
1904 | ||
85076754 MD |
1905 | /* |
1906 | * If a non-default channel has been created in the | |
9550ee81 | 1907 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1908 | * to be provided. |
1909 | */ | |
1910 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1911 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1912 | goto error_unlock; |
85076754 MD |
1913 | } |
1914 | ||
2f77fc4b DG |
1915 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1916 | channel_name); | |
1917 | if (uchan == NULL) { | |
f73fabfd | 1918 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1919 | goto error_unlock; |
2f77fc4b DG |
1920 | } |
1921 | ||
6e911cad MD |
1922 | switch (event->type) { |
1923 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1924 | /* |
1925 | * An empty event name means that everything | |
1926 | * should be disabled. | |
1927 | */ | |
1928 | if (event->name[0] == '\0') { | |
1929 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 JR |
1930 | } else { |
1931 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1932 | event_name); | |
1933 | } | |
6e911cad | 1934 | if (ret != LTTNG_OK) { |
7076b56e | 1935 | goto error_unlock; |
6e911cad MD |
1936 | } |
1937 | break; | |
1938 | default: | |
1939 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1940 | goto error_unlock; |
2f77fc4b DG |
1941 | } |
1942 | ||
1943 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1944 | channel_name); | |
1945 | break; | |
1946 | } | |
5cdb6027 | 1947 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1948 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1949 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1950 | { |
fefd409b | 1951 | struct agent *agt; |
f20baf8e DG |
1952 | struct ltt_ust_session *usess = session->ust_session; |
1953 | ||
1954 | assert(usess); | |
1955 | ||
6e911cad MD |
1956 | switch (event->type) { |
1957 | case LTTNG_EVENT_ALL: | |
1958 | break; | |
1959 | default: | |
1960 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1961 | goto error_unlock; |
6e911cad MD |
1962 | } |
1963 | ||
5cdb6027 | 1964 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1965 | if (!agt) { |
1966 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1967 | goto error_unlock; |
fefd409b | 1968 | } |
b3639870 JR |
1969 | /* |
1970 | * An empty event name means that everything | |
1971 | * should be disabled. | |
1972 | */ | |
1973 | if (event->name[0] == '\0') { | |
18a720cd MD |
1974 | ret = event_agent_disable_all(usess, agt); |
1975 | } else { | |
1976 | ret = event_agent_disable(usess, agt, event_name); | |
1977 | } | |
f20baf8e | 1978 | if (ret != LTTNG_OK) { |
7076b56e | 1979 | goto error_unlock; |
f20baf8e DG |
1980 | } |
1981 | ||
1982 | break; | |
1983 | } | |
2f77fc4b | 1984 | default: |
f73fabfd | 1985 | ret = LTTNG_ERR_UND; |
7076b56e | 1986 | goto error_unlock; |
2f77fc4b DG |
1987 | } |
1988 | ||
f73fabfd | 1989 | ret = LTTNG_OK; |
2f77fc4b | 1990 | |
7076b56e | 1991 | error_unlock: |
2223c96f | 1992 | rcu_read_unlock(); |
7076b56e | 1993 | error: |
2f77fc4b DG |
1994 | return ret; |
1995 | } | |
1996 | ||
2f77fc4b DG |
1997 | /* |
1998 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1999 | */ | |
56a37563 | 2000 | int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain, |
df4f5a87 | 2001 | char *channel_name, const struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 2002 | { |
d5979e4a | 2003 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
bdf64013 JG |
2004 | char *app_ctx_provider_name = NULL, *app_ctx_name = NULL; |
2005 | ||
9a699f7b JR |
2006 | /* |
2007 | * Don't try to add a context if the session has been started at | |
2008 | * some point in time before. The tracer does not allow it and would | |
2009 | * result in a corrupted trace. | |
2010 | */ | |
2011 | if (session->has_been_started) { | |
2012 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2013 | goto end; | |
2014 | } | |
2015 | ||
bdf64013 JG |
2016 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
2017 | app_ctx_provider_name = ctx->u.app_ctx.provider_name; | |
2018 | app_ctx_name = ctx->u.app_ctx.ctx_name; | |
2019 | } | |
2f77fc4b DG |
2020 | |
2021 | switch (domain) { | |
2022 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
2023 | assert(session->kernel_session); |
2024 | ||
2025 | if (session->kernel_session->channel_count == 0) { | |
2026 | /* Create default channel */ | |
2027 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
2028 | if (ret != LTTNG_OK) { | |
2029 | goto error; | |
2030 | } | |
d5979e4a | 2031 | chan_kern_created = 1; |
979e618e | 2032 | } |
2f77fc4b | 2033 | /* Add kernel context to kernel tracer */ |
601d5acf | 2034 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 2035 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2036 | goto error; |
2037 | } | |
2038 | break; | |
bdf64013 JG |
2039 | case LTTNG_DOMAIN_JUL: |
2040 | case LTTNG_DOMAIN_LOG4J: | |
2041 | { | |
2042 | /* | |
2043 | * Validate channel name. | |
2044 | * If no channel name is given and the domain is JUL or LOG4J, | |
2045 | * set it to the appropriate domain-specific channel name. If | |
2046 | * a name is provided but does not match the expexted channel | |
2047 | * name, return an error. | |
2048 | */ | |
2049 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
2050 | strcmp(channel_name, | |
2051 | DEFAULT_JUL_CHANNEL_NAME)) { | |
2052 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2053 | goto error; | |
2054 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
2055 | strcmp(channel_name, | |
2056 | DEFAULT_LOG4J_CHANNEL_NAME)) { | |
2057 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2058 | goto error; | |
2059 | } | |
a93b3916 | 2060 | /* break is _not_ missing here. */ |
bdf64013 | 2061 | } |
2f77fc4b DG |
2062 | case LTTNG_DOMAIN_UST: |
2063 | { | |
2064 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
2065 | unsigned int chan_count; |
2066 | ||
2f77fc4b DG |
2067 | assert(usess); |
2068 | ||
85076754 | 2069 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
2070 | if (chan_count == 0) { |
2071 | struct lttng_channel *attr; | |
2072 | /* Create default channel */ | |
0a9c6494 | 2073 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
2074 | if (attr == NULL) { |
2075 | ret = LTTNG_ERR_FATAL; | |
2076 | goto error; | |
2077 | } | |
2078 | ||
7972aab2 | 2079 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
2080 | if (ret != LTTNG_OK) { |
2081 | free(attr); | |
2082 | goto error; | |
2083 | } | |
cf0bcb51 | 2084 | channel_attr_destroy(attr); |
d5979e4a | 2085 | chan_ust_created = 1; |
979e618e DG |
2086 | } |
2087 | ||
601d5acf | 2088 | ret = context_ust_add(usess, domain, ctx, channel_name); |
bdf64013 JG |
2089 | free(app_ctx_provider_name); |
2090 | free(app_ctx_name); | |
2091 | app_ctx_name = NULL; | |
2092 | app_ctx_provider_name = NULL; | |
f73fabfd | 2093 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2094 | goto error; |
2095 | } | |
2096 | break; | |
2097 | } | |
2f77fc4b | 2098 | default: |
f73fabfd | 2099 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2100 | goto error; |
2101 | } | |
2102 | ||
bdf64013 JG |
2103 | ret = LTTNG_OK; |
2104 | goto end; | |
2f77fc4b DG |
2105 | |
2106 | error: | |
d5979e4a DG |
2107 | if (chan_kern_created) { |
2108 | struct ltt_kernel_channel *kchan = | |
2109 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
2110 | session->kernel_session); | |
2111 | /* Created previously, this should NOT fail. */ | |
2112 | assert(kchan); | |
2113 | kernel_destroy_channel(kchan); | |
2114 | } | |
2115 | ||
2116 | if (chan_ust_created) { | |
2117 | struct ltt_ust_channel *uchan = | |
2118 | trace_ust_find_channel_by_name( | |
2119 | session->ust_session->domain_global.channels, | |
2120 | DEFAULT_CHANNEL_NAME); | |
2121 | /* Created previously, this should NOT fail. */ | |
2122 | assert(uchan); | |
2123 | /* Remove from the channel list of the session. */ | |
2124 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
2125 | uchan); | |
2126 | trace_ust_destroy_channel(uchan); | |
2127 | } | |
bdf64013 JG |
2128 | end: |
2129 | free(app_ctx_provider_name); | |
2130 | free(app_ctx_name); | |
2f77fc4b DG |
2131 | return ret; |
2132 | } | |
2133 | ||
dac8e046 JG |
2134 | static inline bool name_starts_with(const char *name, const char *prefix) |
2135 | { | |
2136 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
2137 | ||
2138 | return !strncmp(name, prefix, max_cmp_len); | |
2139 | } | |
2140 | ||
2141 | /* Perform userspace-specific event name validation */ | |
2142 | static int validate_ust_event_name(const char *name) | |
2143 | { | |
2144 | int ret = 0; | |
2145 | ||
2146 | if (!name) { | |
2147 | ret = -1; | |
2148 | goto end; | |
2149 | } | |
2150 | ||
2151 | /* | |
2152 | * Check name against all internal UST event component namespaces used | |
2153 | * by the agents. | |
2154 | */ | |
2155 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
2156 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
2157 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
2158 | ret = -1; | |
2159 | } | |
2160 | ||
2161 | end: | |
2162 | return ret; | |
2163 | } | |
88f06f15 | 2164 | |
2f77fc4b | 2165 | /* |
88f06f15 JG |
2166 | * Internal version of cmd_enable_event() with a supplemental |
2167 | * "internal_event" flag which is used to enable internal events which should | |
2168 | * be hidden from clients. Such events are used in the agent implementation to | |
2169 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 2170 | */ |
88f06f15 | 2171 | static int _cmd_enable_event(struct ltt_session *session, |
df4f5a87 | 2172 | const struct lttng_domain *domain, |
025faf73 | 2173 | char *channel_name, struct lttng_event *event, |
6b453b5e | 2174 | char *filter_expression, |
5024c2ac | 2175 | struct lttng_bytecode *filter, |
db8f1377 | 2176 | struct lttng_event_exclusion *exclusion, |
88f06f15 | 2177 | int wpipe, bool internal_event) |
2f77fc4b | 2178 | { |
9f449915 | 2179 | int ret = 0, channel_created = 0; |
cfedea03 | 2180 | struct lttng_channel *attr = NULL; |
2f77fc4b DG |
2181 | |
2182 | assert(session); | |
2183 | assert(event); | |
2184 | assert(channel_name); | |
2185 | ||
2a385866 JG |
2186 | /* If we have a filter, we must have its filter expression */ |
2187 | assert(!(!!filter_expression ^ !!filter)); | |
2188 | ||
9f449915 PP |
2189 | /* Normalize event name as a globbing pattern */ |
2190 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 2191 | |
9f449915 PP |
2192 | /* Normalize exclusion names as globbing patterns */ |
2193 | if (exclusion) { | |
2194 | size_t i; | |
f5ac4bd7 | 2195 | |
9f449915 PP |
2196 | for (i = 0; i < exclusion->count; i++) { |
2197 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
2198 | ||
2199 | strutils_normalize_star_glob_pattern(name); | |
2200 | } | |
930a2e99 JG |
2201 | } |
2202 | ||
9f449915 PP |
2203 | DBG("Enable event command for event \'%s\'", event->name); |
2204 | ||
2205 | rcu_read_lock(); | |
2206 | ||
7972aab2 | 2207 | switch (domain->type) { |
2f77fc4b DG |
2208 | case LTTNG_DOMAIN_KERNEL: |
2209 | { | |
2210 | struct ltt_kernel_channel *kchan; | |
2211 | ||
85076754 MD |
2212 | /* |
2213 | * If a non-default channel has been created in the | |
2214 | * session, explicitely require that -c chan_name needs | |
2215 | * to be provided. | |
2216 | */ | |
2217 | if (session->kernel_session->has_non_default_channel | |
2218 | && channel_name[0] == '\0') { | |
2219 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2220 | goto error; | |
2221 | } | |
2222 | ||
2f77fc4b DG |
2223 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2224 | session->kernel_session); | |
2225 | if (kchan == NULL) { | |
0a9c6494 DG |
2226 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
2227 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 2228 | if (attr == NULL) { |
f73fabfd | 2229 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2230 | goto error; |
2231 | } | |
04c17253 MD |
2232 | if (lttng_strncpy(attr->name, channel_name, |
2233 | sizeof(attr->name))) { | |
2234 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2235 | goto error; |
2236 | } | |
2f77fc4b DG |
2237 | |
2238 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2239 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2240 | goto error; |
2241 | } | |
e5f5db7f | 2242 | channel_created = 1; |
2f77fc4b DG |
2243 | } |
2244 | ||
2245 | /* Get the newly created kernel channel pointer */ | |
2246 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2247 | session->kernel_session); | |
2248 | if (kchan == NULL) { | |
2249 | /* This sould not happen... */ | |
f73fabfd | 2250 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2251 | goto error; |
2252 | } | |
2253 | ||
6e911cad MD |
2254 | switch (event->type) { |
2255 | case LTTNG_EVENT_ALL: | |
29c62722 | 2256 | { |
00a62084 | 2257 | char *filter_expression_a = NULL; |
5024c2ac | 2258 | struct lttng_bytecode *filter_a = NULL; |
00a62084 MD |
2259 | |
2260 | /* | |
2261 | * We need to duplicate filter_expression and filter, | |
2262 | * because ownership is passed to first enable | |
2263 | * event. | |
2264 | */ | |
2265 | if (filter_expression) { | |
2266 | filter_expression_a = strdup(filter_expression); | |
2267 | if (!filter_expression_a) { | |
2268 | ret = LTTNG_ERR_FATAL; | |
2269 | goto error; | |
2270 | } | |
2271 | } | |
2272 | if (filter) { | |
2273 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
2274 | if (!filter_a) { | |
2275 | free(filter_expression_a); | |
2276 | ret = LTTNG_ERR_FATAL; | |
2277 | goto error; | |
2278 | } | |
2279 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
2280 | } | |
29c62722 | 2281 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
2282 | ret = event_kernel_enable_event(kchan, event, |
2283 | filter_expression, filter); | |
a969e101 MD |
2284 | /* We have passed ownership */ |
2285 | filter_expression = NULL; | |
2286 | filter = NULL; | |
29c62722 MD |
2287 | if (ret != LTTNG_OK) { |
2288 | if (channel_created) { | |
2289 | /* Let's not leak a useless channel. */ | |
2290 | kernel_destroy_channel(kchan); | |
2291 | } | |
00a62084 MD |
2292 | free(filter_expression_a); |
2293 | free(filter_a); | |
29c62722 MD |
2294 | goto error; |
2295 | } | |
2296 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
2297 | ret = event_kernel_enable_event(kchan, event, |
2298 | filter_expression_a, filter_a); | |
60d21fa2 AB |
2299 | /* We have passed ownership */ |
2300 | filter_expression_a = NULL; | |
2301 | filter_a = NULL; | |
29c62722 MD |
2302 | if (ret != LTTNG_OK) { |
2303 | goto error; | |
2304 | } | |
2305 | break; | |
2306 | } | |
6e6ef3d7 | 2307 | case LTTNG_EVENT_PROBE: |
dcabc190 | 2308 | case LTTNG_EVENT_USERSPACE_PROBE: |
6e6ef3d7 DG |
2309 | case LTTNG_EVENT_FUNCTION: |
2310 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 2311 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
2312 | ret = event_kernel_enable_event(kchan, event, |
2313 | filter_expression, filter); | |
a969e101 MD |
2314 | /* We have passed ownership */ |
2315 | filter_expression = NULL; | |
2316 | filter = NULL; | |
6e911cad MD |
2317 | if (ret != LTTNG_OK) { |
2318 | if (channel_created) { | |
2319 | /* Let's not leak a useless channel. */ | |
2320 | kernel_destroy_channel(kchan); | |
2321 | } | |
2322 | goto error; | |
e5f5db7f | 2323 | } |
6e911cad MD |
2324 | break; |
2325 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
2326 | ret = event_kernel_enable_event(kchan, event, |
2327 | filter_expression, filter); | |
a969e101 MD |
2328 | /* We have passed ownership */ |
2329 | filter_expression = NULL; | |
2330 | filter = NULL; | |
e2b957af MD |
2331 | if (ret != LTTNG_OK) { |
2332 | goto error; | |
2333 | } | |
6e911cad MD |
2334 | break; |
2335 | default: | |
2336 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
2337 | goto error; |
2338 | } | |
2339 | ||
7d268848 | 2340 | kernel_wait_quiescent(); |
2f77fc4b DG |
2341 | break; |
2342 | } | |
2343 | case LTTNG_DOMAIN_UST: | |
2344 | { | |
2345 | struct ltt_ust_channel *uchan; | |
2346 | struct ltt_ust_session *usess = session->ust_session; | |
2347 | ||
2348 | assert(usess); | |
2349 | ||
85076754 MD |
2350 | /* |
2351 | * If a non-default channel has been created in the | |
2352 | * session, explicitely require that -c chan_name needs | |
2353 | * to be provided. | |
2354 | */ | |
2355 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
2356 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2357 | goto error; | |
2358 | } | |
2359 | ||
2f77fc4b DG |
2360 | /* Get channel from global UST domain */ |
2361 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2362 | channel_name); | |
2363 | if (uchan == NULL) { | |
2364 | /* Create default channel */ | |
0a9c6494 DG |
2365 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
2366 | usess->buffer_type); | |
2f77fc4b | 2367 | if (attr == NULL) { |
f73fabfd | 2368 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2369 | goto error; |
2370 | } | |
04c17253 MD |
2371 | if (lttng_strncpy(attr->name, channel_name, |
2372 | sizeof(attr->name))) { | |
2373 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2374 | goto error; |
2375 | } | |
2f77fc4b DG |
2376 | |
2377 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2378 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2379 | goto error; |
2380 | } | |
2f77fc4b DG |
2381 | |
2382 | /* Get the newly created channel reference back */ | |
2383 | uchan = trace_ust_find_channel_by_name( | |
2384 | usess->domain_global.channels, channel_name); | |
2385 | assert(uchan); | |
2386 | } | |
2387 | ||
141feb8c JG |
2388 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2389 | /* | |
2390 | * Don't allow users to add UST events to channels which | |
2391 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2392 | * Python, etc.). | |
2393 | */ | |
2394 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2395 | goto error; | |
2396 | } | |
2397 | ||
dac8e046 JG |
2398 | if (!internal_event) { |
2399 | /* | |
2400 | * Ensure the event name is not reserved for internal | |
2401 | * use. | |
2402 | */ | |
2403 | ret = validate_ust_event_name(event->name); | |
2404 | if (ret) { | |
2405 | WARN("Userspace event name %s failed validation.", | |
bbcab087 | 2406 | event->name); |
dac8e046 JG |
2407 | ret = LTTNG_ERR_INVALID_EVENT_NAME; |
2408 | goto error; | |
2409 | } | |
2410 | } | |
2411 | ||
2f77fc4b | 2412 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 2413 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
88f06f15 JG |
2414 | filter_expression, filter, exclusion, |
2415 | internal_event); | |
49d21f93 MD |
2416 | /* We have passed ownership */ |
2417 | filter_expression = NULL; | |
2418 | filter = NULL; | |
2419 | exclusion = NULL; | |
94382e15 JG |
2420 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2421 | goto already_enabled; | |
2422 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2423 | goto error; |
2424 | } | |
2425 | break; | |
2426 | } | |
5cdb6027 | 2427 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2428 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2429 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2430 | { |
da6c3a50 | 2431 | const char *default_event_name, *default_chan_name; |
fefd409b | 2432 | struct agent *agt; |
f20baf8e DG |
2433 | struct lttng_event uevent; |
2434 | struct lttng_domain tmp_dom; | |
2435 | struct ltt_ust_session *usess = session->ust_session; | |
2436 | ||
2437 | assert(usess); | |
2438 | ||
f28f9e44 JG |
2439 | if (!agent_tracing_is_enabled()) { |
2440 | DBG("Attempted to enable an event in an agent domain but the agent thread is not running"); | |
2441 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
2442 | goto error; | |
2443 | } | |
2444 | ||
5cdb6027 | 2445 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2446 | if (!agt) { |
5cdb6027 | 2447 | agt = agent_create(domain->type); |
fefd409b | 2448 | if (!agt) { |
e5b3c48c | 2449 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2450 | goto error; |
2451 | } | |
2452 | agent_add(agt, usess->agents); | |
2453 | } | |
2454 | ||
022d91ba | 2455 | /* Create the default tracepoint. */ |
996de3c7 | 2456 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2457 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2458 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
51755dc8 JG |
2459 | default_event_name = event_get_default_agent_ust_name( |
2460 | domain->type); | |
da6c3a50 | 2461 | if (!default_event_name) { |
e5b3c48c | 2462 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2463 | goto error; |
f43f95a9 | 2464 | } |
da6c3a50 | 2465 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2466 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2467 | ||
2468 | /* | |
2469 | * The domain type is changed because we are about to enable the | |
2470 | * default channel and event for the JUL domain that are hardcoded. | |
2471 | * This happens in the UST domain. | |
2472 | */ | |
2473 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2474 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2475 | ||
0e115563 DG |
2476 | switch (domain->type) { |
2477 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2478 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2479 | break; |
2480 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2481 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2482 | break; |
2483 | case LTTNG_DOMAIN_PYTHON: | |
2484 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2485 | break; | |
2486 | default: | |
e98a44b0 | 2487 | /* The switch/case we are in makes this impossible */ |
0e115563 | 2488 | assert(0); |
da6c3a50 DG |
2489 | } |
2490 | ||
971da06a | 2491 | { |
8404118c | 2492 | char *filter_expression_copy = NULL; |
5024c2ac | 2493 | struct lttng_bytecode *filter_copy = NULL; |
971da06a JG |
2494 | |
2495 | if (filter) { | |
51755dc8 | 2496 | const size_t filter_size = sizeof( |
5024c2ac | 2497 | struct lttng_bytecode) |
51755dc8 JG |
2498 | + filter->len; |
2499 | ||
2500 | filter_copy = zmalloc(filter_size); | |
971da06a | 2501 | if (!filter_copy) { |
018096a4 | 2502 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2503 | goto error; |
971da06a | 2504 | } |
51755dc8 | 2505 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2506 | |
8404118c JG |
2507 | filter_expression_copy = |
2508 | strdup(filter_expression); | |
2509 | if (!filter_expression) { | |
2510 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2511 | } |
2512 | ||
2513 | if (!filter_expression_copy || !filter_copy) { | |
2514 | free(filter_expression_copy); | |
2515 | free(filter_copy); | |
2516 | goto error; | |
8404118c | 2517 | } |
971da06a JG |
2518 | } |
2519 | ||
88f06f15 | 2520 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a | 2521 | (char *) default_chan_name, |
8404118c JG |
2522 | &uevent, filter_expression_copy, |
2523 | filter_copy, NULL, wpipe); | |
971da06a JG |
2524 | } |
2525 | ||
94382e15 JG |
2526 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2527 | goto already_enabled; | |
2528 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2529 | goto error; |
2530 | } | |
2531 | ||
2532 | /* The wild card * means that everything should be enabled. */ | |
2533 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8404118c JG |
2534 | ret = event_agent_enable_all(usess, agt, event, filter, |
2535 | filter_expression); | |
f20baf8e | 2536 | } else { |
8404118c JG |
2537 | ret = event_agent_enable(usess, agt, event, filter, |
2538 | filter_expression); | |
f20baf8e | 2539 | } |
51755dc8 JG |
2540 | filter = NULL; |
2541 | filter_expression = NULL; | |
f20baf8e DG |
2542 | if (ret != LTTNG_OK) { |
2543 | goto error; | |
2544 | } | |
2545 | ||
2546 | break; | |
2547 | } | |
2f77fc4b | 2548 | default: |
f73fabfd | 2549 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2550 | goto error; |
2551 | } | |
2552 | ||
f73fabfd | 2553 | ret = LTTNG_OK; |
2f77fc4b | 2554 | |
94382e15 | 2555 | already_enabled: |
2f77fc4b | 2556 | error: |
49d21f93 MD |
2557 | free(filter_expression); |
2558 | free(filter); | |
2559 | free(exclusion); | |
cf0bcb51 | 2560 | channel_attr_destroy(attr); |
2223c96f | 2561 | rcu_read_unlock(); |
2f77fc4b DG |
2562 | return ret; |
2563 | } | |
2564 | ||
88f06f15 JG |
2565 | /* |
2566 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2567 | * We own filter, exclusion, and filter_expression. | |
2568 | */ | |
df4f5a87 JG |
2569 | int cmd_enable_event(struct ltt_session *session, |
2570 | const struct lttng_domain *domain, | |
88f06f15 JG |
2571 | char *channel_name, struct lttng_event *event, |
2572 | char *filter_expression, | |
5024c2ac | 2573 | struct lttng_bytecode *filter, |
88f06f15 JG |
2574 | struct lttng_event_exclusion *exclusion, |
2575 | int wpipe) | |
2576 | { | |
2577 | return _cmd_enable_event(session, domain, channel_name, event, | |
2578 | filter_expression, filter, exclusion, wpipe, false); | |
2579 | } | |
2580 | ||
2581 | /* | |
2582 | * Enable an event which is internal to LTTng. An internal should | |
2583 | * never be made visible to clients and are immune to checks such as | |
2584 | * reserved names. | |
2585 | */ | |
2586 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 2587 | const struct lttng_domain *domain, |
88f06f15 JG |
2588 | char *channel_name, struct lttng_event *event, |
2589 | char *filter_expression, | |
5024c2ac | 2590 | struct lttng_bytecode *filter, |
88f06f15 JG |
2591 | struct lttng_event_exclusion *exclusion, |
2592 | int wpipe) | |
2593 | { | |
2594 | return _cmd_enable_event(session, domain, channel_name, event, | |
2595 | filter_expression, filter, exclusion, wpipe, true); | |
2596 | } | |
2597 | ||
2f77fc4b DG |
2598 | /* |
2599 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2600 | */ | |
56a37563 JG |
2601 | ssize_t cmd_list_tracepoints(enum lttng_domain_type domain, |
2602 | struct lttng_event **events) | |
2f77fc4b DG |
2603 | { |
2604 | int ret; | |
2605 | ssize_t nb_events = 0; | |
2606 | ||
2607 | switch (domain) { | |
2608 | case LTTNG_DOMAIN_KERNEL: | |
7d268848 | 2609 | nb_events = kernel_list_events(events); |
2f77fc4b | 2610 | if (nb_events < 0) { |
f73fabfd | 2611 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2612 | goto error; |
2613 | } | |
2614 | break; | |
2615 | case LTTNG_DOMAIN_UST: | |
2616 | nb_events = ust_app_list_events(events); | |
2617 | if (nb_events < 0) { | |
f73fabfd | 2618 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2619 | goto error; |
2620 | } | |
2621 | break; | |
5cdb6027 | 2622 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2623 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2624 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 2625 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
2626 | if (nb_events < 0) { |
2627 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2628 | goto error; | |
2629 | } | |
2630 | break; | |
2f77fc4b | 2631 | default: |
f73fabfd | 2632 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2633 | goto error; |
2634 | } | |
2635 | ||
2636 | return nb_events; | |
2637 | ||
2638 | error: | |
2639 | /* Return negative value to differentiate return code */ | |
2640 | return -ret; | |
2641 | } | |
2642 | ||
2643 | /* | |
2644 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2645 | */ | |
56a37563 | 2646 | ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
2f77fc4b DG |
2647 | struct lttng_event_field **fields) |
2648 | { | |
2649 | int ret; | |
2650 | ssize_t nb_fields = 0; | |
2651 | ||
2652 | switch (domain) { | |
2653 | case LTTNG_DOMAIN_UST: | |
2654 | nb_fields = ust_app_list_event_fields(fields); | |
2655 | if (nb_fields < 0) { | |
f73fabfd | 2656 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2657 | goto error; |
2658 | } | |
2659 | break; | |
2660 | case LTTNG_DOMAIN_KERNEL: | |
2661 | default: /* fall-through */ | |
f73fabfd | 2662 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2663 | goto error; |
2664 | } | |
2665 | ||
2666 | return nb_fields; | |
2667 | ||
2668 | error: | |
2669 | /* Return negative value to differentiate return code */ | |
2670 | return -ret; | |
2671 | } | |
2672 | ||
834978fd DG |
2673 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
2674 | { | |
2675 | return syscall_table_list(events); | |
2676 | } | |
2677 | ||
2f77fc4b DG |
2678 | /* |
2679 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2680 | * |
2681 | * Called with session mutex held. | |
2f77fc4b DG |
2682 | */ |
2683 | int cmd_start_trace(struct ltt_session *session) | |
2684 | { | |
82b69413 | 2685 | enum lttng_error_code ret; |
cde3e505 | 2686 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2687 | struct ltt_kernel_session *ksession; |
2688 | struct ltt_ust_session *usess; | |
1f496244 JG |
2689 | const bool session_rotated_after_last_stop = |
2690 | session->rotated_after_last_stop; | |
b02f5986 MD |
2691 | const bool session_cleared_after_last_stop = |
2692 | session->cleared_after_last_stop; | |
2f77fc4b DG |
2693 | |
2694 | assert(session); | |
2695 | ||
2696 | /* Ease our life a bit ;) */ | |
2697 | ksession = session->kernel_session; | |
2698 | usess = session->ust_session; | |
2699 | ||
8382cf6f DG |
2700 | /* Is the session already started? */ |
2701 | if (session->active) { | |
f73fabfd | 2702 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
7a24ece3 JR |
2703 | /* Perform nothing */ |
2704 | goto end; | |
2f77fc4b DG |
2705 | } |
2706 | ||
1f496244 JG |
2707 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING && |
2708 | !session->current_trace_chunk) { | |
2709 | /* | |
2710 | * A rotation was launched while the session was stopped and | |
2711 | * it has not been completed yet. It is not possible to start | |
2712 | * the session since starting the session here would require a | |
2713 | * rotation from "NULL" to a new trace chunk. That rotation | |
2714 | * would overlap with the ongoing rotation, which is not | |
2715 | * supported. | |
2716 | */ | |
2717 | WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing", | |
2718 | session->name); | |
2719 | ret = LTTNG_ERR_ROTATION_PENDING; | |
2720 | goto error; | |
2721 | } | |
2722 | ||
cde3e505 DG |
2723 | /* |
2724 | * Starting a session without channel is useless since after that it's not | |
2725 | * possible to enable channel thus inform the client. | |
2726 | */ | |
2727 | if (usess && usess->domain_global.channels) { | |
2728 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2729 | } | |
2730 | if (ksession) { | |
2731 | nb_chan += ksession->channel_count; | |
2732 | } | |
2733 | if (!nb_chan) { | |
2734 | ret = LTTNG_ERR_NO_CHANNEL; | |
2735 | goto error; | |
2736 | } | |
2737 | ||
1f496244 JG |
2738 | session->active = 1; |
2739 | session->rotated_after_last_stop = false; | |
b02f5986 | 2740 | session->cleared_after_last_stop = false; |
070b6a86 | 2741 | if (session->output_traces && !session->current_trace_chunk) { |
1f496244 JG |
2742 | if (!session->has_been_started) { |
2743 | struct lttng_trace_chunk *trace_chunk; | |
2744 | ||
2745 | DBG("Creating initial trace chunk of session \"%s\"", | |
2746 | session->name); | |
2747 | trace_chunk = session_create_new_trace_chunk( | |
2748 | session, NULL, NULL, NULL); | |
2749 | if (!trace_chunk) { | |
2750 | ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
2751 | goto error; | |
2752 | } | |
2753 | assert(!session->current_trace_chunk); | |
2754 | ret = session_set_trace_chunk(session, trace_chunk, | |
2755 | NULL); | |
2756 | lttng_trace_chunk_put(trace_chunk); | |
2757 | if (ret) { | |
2758 | ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
2759 | goto error; | |
2760 | } | |
2761 | } else { | |
2762 | DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk", | |
2763 | session->name); | |
2764 | /* | |
2765 | * Rotate existing streams into the new chunk. | |
2766 | * This is a "quiet" rotation has no client has | |
2767 | * explicitly requested this operation. | |
2768 | * | |
2769 | * There is also no need to wait for the rotation | |
2770 | * to complete as it will happen immediately. No data | |
2771 | * was produced as the session was stopped, so the | |
2772 | * rotation should happen on reception of the command. | |
2773 | */ | |
343defc2 MD |
2774 | ret = cmd_rotate_session(session, NULL, true, |
2775 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
1f496244 JG |
2776 | if (ret != LTTNG_OK) { |
2777 | goto error; | |
2778 | } | |
5c408ad8 | 2779 | } |
c996624c JD |
2780 | } |
2781 | ||
2f77fc4b DG |
2782 | /* Kernel tracing */ |
2783 | if (ksession != NULL) { | |
c996624c | 2784 | DBG("Start kernel tracing session %s", session->name); |
7d268848 | 2785 | ret = start_kernel_session(ksession); |
9b6c7ec5 | 2786 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2787 | goto error; |
2788 | } | |
2f77fc4b DG |
2789 | } |
2790 | ||
2791 | /* Flag session that trace should start automatically */ | |
2792 | if (usess) { | |
82b69413 JG |
2793 | int int_ret = ust_app_start_trace_all(usess); |
2794 | ||
2795 | if (int_ret < 0) { | |
f73fabfd | 2796 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2797 | goto error; |
2798 | } | |
2799 | } | |
2800 | ||
5c408ad8 JD |
2801 | /* |
2802 | * Clear the flag that indicates that a rotation was done while the | |
2803 | * session was stopped. | |
2804 | */ | |
2805 | session->rotated_after_last_stop = false; | |
2806 | ||
259c2674 | 2807 | if (session->rotate_timer_period) { |
82b69413 JG |
2808 | int int_ret = timer_session_rotation_schedule_timer_start( |
2809 | session, session->rotate_timer_period); | |
2810 | ||
2811 | if (int_ret < 0) { | |
259c2674 JD |
2812 | ERR("Failed to enable rotate timer"); |
2813 | ret = LTTNG_ERR_UNK; | |
2814 | goto error; | |
2815 | } | |
2816 | } | |
2817 | ||
f73fabfd | 2818 | ret = LTTNG_OK; |
2f77fc4b DG |
2819 | |
2820 | error: | |
1f496244 JG |
2821 | if (ret == LTTNG_OK) { |
2822 | /* Flag this after a successful start. */ | |
2823 | session->has_been_started |= 1; | |
2824 | } else { | |
2825 | session->active = 0; | |
2826 | /* Restore initial state on error. */ | |
2827 | session->rotated_after_last_stop = | |
2828 | session_rotated_after_last_stop; | |
b02f5986 MD |
2829 | session->cleared_after_last_stop = |
2830 | session_cleared_after_last_stop; | |
1f496244 | 2831 | } |
7a24ece3 | 2832 | end: |
2f77fc4b DG |
2833 | return ret; |
2834 | } | |
2835 | ||
2836 | /* | |
2837 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2838 | */ | |
2839 | int cmd_stop_trace(struct ltt_session *session) | |
2840 | { | |
2841 | int ret; | |
2f77fc4b DG |
2842 | struct ltt_kernel_session *ksession; |
2843 | struct ltt_ust_session *usess; | |
2844 | ||
2845 | assert(session); | |
2846 | ||
4dbe1875 | 2847 | DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
2f77fc4b DG |
2848 | /* Short cut */ |
2849 | ksession = session->kernel_session; | |
2850 | usess = session->ust_session; | |
2851 | ||
8382cf6f DG |
2852 | /* Session is not active. Skip everythong and inform the client. */ |
2853 | if (!session->active) { | |
f73fabfd | 2854 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2855 | goto error; |
2856 | } | |
2857 | ||
4dbe1875 MD |
2858 | ret = stop_kernel_session(ksession); |
2859 | if (ret != LTTNG_OK) { | |
2860 | goto error; | |
2f77fc4b DG |
2861 | } |
2862 | ||
14fb1ebe | 2863 | if (usess && usess->active) { |
2f77fc4b DG |
2864 | ret = ust_app_stop_trace_all(usess); |
2865 | if (ret < 0) { | |
f73fabfd | 2866 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2867 | goto error; |
2868 | } | |
2869 | } | |
2870 | ||
4dbe1875 MD |
2871 | DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name, |
2872 | session->id); | |
8382cf6f DG |
2873 | /* Flag inactive after a successful stop. */ |
2874 | session->active = 0; | |
4dbe1875 | 2875 | ret = LTTNG_OK; |
2f77fc4b DG |
2876 | |
2877 | error: | |
2878 | return ret; | |
2879 | } | |
2880 | ||
2881 | /* | |
433f5ba9 JR |
2882 | * Set the base_path of the session only if subdir of a control uris is set. |
2883 | * Return LTTNG_OK on success, otherwise LTTNG_ERR_*. | |
2f77fc4b | 2884 | */ |
433f5ba9 JR |
2885 | static int set_session_base_path_from_uris(struct ltt_session *session, |
2886 | size_t nb_uri, | |
bda32d56 | 2887 | struct lttng_uri *uris) |
2f77fc4b | 2888 | { |
433f5ba9 JR |
2889 | int ret; |
2890 | size_t i; | |
2f77fc4b | 2891 | |
e3876bf0 JR |
2892 | for (i = 0; i < nb_uri; i++) { |
2893 | if (uris[i].stype != LTTNG_STREAM_CONTROL || | |
2894 | uris[i].subdir[0] == '\0') { | |
2895 | /* Not interested in these URIs */ | |
2896 | continue; | |
2897 | } | |
2898 | ||
2899 | if (session->base_path != NULL) { | |
2900 | free(session->base_path); | |
2901 | session->base_path = NULL; | |
2902 | } | |
2903 | ||
2904 | /* Set session base_path */ | |
2905 | session->base_path = strdup(uris[i].subdir); | |
2906 | if (!session->base_path) { | |
433f5ba9 JR |
2907 | PERROR("Failed to copy base path \"%s\" to session \"%s\"", |
2908 | uris[i].subdir, session->name); | |
2909 | ret = LTTNG_ERR_NOMEM; | |
e3876bf0 JR |
2910 | goto error; |
2911 | } | |
433f5ba9 JR |
2912 | DBG2("Setting base path \"%s\" for session \"%s\"", |
2913 | session->base_path, session->name); | |
2914 | } | |
2915 | ret = LTTNG_OK; | |
2916 | error: | |
2917 | return ret; | |
2918 | } | |
2919 | ||
2920 | /* | |
2921 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2922 | */ | |
2923 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, | |
2924 | struct lttng_uri *uris) | |
2925 | { | |
2926 | int ret, i; | |
2927 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2928 | struct ltt_ust_session *usess = session->ust_session; | |
2929 | ||
2930 | assert(session); | |
2931 | assert(uris); | |
2932 | assert(nb_uri > 0); | |
2933 | ||
2934 | /* Can't set consumer URI if the session is active. */ | |
2935 | if (session->active) { | |
2936 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2937 | goto error; | |
2938 | } | |
2939 | ||
2940 | /* | |
2941 | * Set the session base path if any. This is done inside | |
2942 | * cmd_set_consumer_uri to preserve backward compatibility of the | |
2943 | * previous session creation api vs the session descriptor api. | |
2944 | */ | |
2945 | ret = set_session_base_path_from_uris(session, nb_uri, uris); | |
2946 | if (ret != LTTNG_OK) { | |
2947 | goto error; | |
e3876bf0 JR |
2948 | } |
2949 | ||
bda32d56 | 2950 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2951 | for (i = 0; i < nb_uri; i++) { |
e3876bf0 JR |
2952 | ret = add_uri_to_consumer(session, session->consumer, &uris[i], |
2953 | LTTNG_DOMAIN_NONE); | |
a74934ba | 2954 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2955 | goto error; |
2956 | } | |
2f77fc4b DG |
2957 | } |
2958 | ||
bda32d56 JG |
2959 | /* Set UST session URIs */ |
2960 | if (session->ust_session) { | |
2961 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2962 | ret = add_uri_to_consumer(session, |
bda32d56 | 2963 | session->ust_session->consumer, |
b178f53e | 2964 | &uris[i], LTTNG_DOMAIN_UST); |
bda32d56 JG |
2965 | if (ret != LTTNG_OK) { |
2966 | goto error; | |
2967 | } | |
2968 | } | |
2969 | } | |
2970 | ||
2971 | /* Set kernel session URIs */ | |
2972 | if (session->kernel_session) { | |
2973 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2974 | ret = add_uri_to_consumer(session, |
bda32d56 | 2975 | session->kernel_session->consumer, |
b178f53e | 2976 | &uris[i], LTTNG_DOMAIN_KERNEL); |
bda32d56 JG |
2977 | if (ret != LTTNG_OK) { |
2978 | goto error; | |
2979 | } | |
2980 | } | |
2981 | } | |
2982 | ||
7ab70fe0 DG |
2983 | /* |
2984 | * Make sure to set the session in output mode after we set URI since a | |
2985 | * session can be created without URL (thus flagged in no output mode). | |
2986 | */ | |
2987 | session->output_traces = 1; | |
2988 | if (ksess) { | |
2989 | ksess->output_traces = 1; | |
bda32d56 JG |
2990 | } |
2991 | ||
2992 | if (usess) { | |
7ab70fe0 DG |
2993 | usess->output_traces = 1; |
2994 | } | |
2995 | ||
2f77fc4b | 2996 | /* All good! */ |
f73fabfd | 2997 | ret = LTTNG_OK; |
2f77fc4b DG |
2998 | |
2999 | error: | |
3000 | return ret; | |
3001 | } | |
3002 | ||
b178f53e JG |
3003 | static |
3004 | enum lttng_error_code set_session_output_from_descriptor( | |
3005 | struct ltt_session *session, | |
3006 | const struct lttng_session_descriptor *descriptor) | |
2f77fc4b DG |
3007 | { |
3008 | int ret; | |
b178f53e JG |
3009 | enum lttng_error_code ret_code = LTTNG_OK; |
3010 | enum lttng_session_descriptor_type session_type = | |
3011 | lttng_session_descriptor_get_type(descriptor); | |
3012 | enum lttng_session_descriptor_output_type output_type = | |
3013 | lttng_session_descriptor_get_output_type(descriptor); | |
3014 | struct lttng_uri uris[2] = {}; | |
3015 | size_t uri_count = 0; | |
3016 | ||
3017 | switch (output_type) { | |
3018 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: | |
3019 | goto end; | |
3020 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: | |
3021 | lttng_session_descriptor_get_local_output_uri(descriptor, | |
3022 | &uris[0]); | |
3023 | uri_count = 1; | |
3024 | break; | |
3025 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: | |
3026 | lttng_session_descriptor_get_network_output_uris(descriptor, | |
3027 | &uris[0], &uris[1]); | |
3028 | uri_count = 2; | |
3029 | break; | |
3030 | default: | |
3031 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3032 | goto end; |
2f77fc4b DG |
3033 | } |
3034 | ||
b178f53e JG |
3035 | switch (session_type) { |
3036 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3037 | { | |
3038 | struct snapshot_output *new_output = NULL; | |
3039 | ||
3040 | new_output = snapshot_output_alloc(); | |
3041 | if (!new_output) { | |
3042 | ret_code = LTTNG_ERR_NOMEM; | |
3043 | goto end; | |
3044 | } | |
3045 | ||
3046 | ret = snapshot_output_init_with_uri(session, | |
3047 | DEFAULT_SNAPSHOT_MAX_SIZE, | |
3048 | NULL, uris, uri_count, session->consumer, | |
3049 | new_output, &session->snapshot); | |
3050 | if (ret < 0) { | |
3051 | ret_code = (ret == -ENOMEM) ? | |
3052 | LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID; | |
3053 | snapshot_output_destroy(new_output); | |
3054 | goto end; | |
3055 | } | |
3056 | snapshot_add_output(&session->snapshot, new_output); | |
3057 | break; | |
3058 | } | |
3059 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: | |
3060 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3061 | { | |
3062 | ret_code = cmd_set_consumer_uri(session, uri_count, uris); | |
3063 | break; | |
3064 | } | |
3065 | default: | |
3066 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3067 | goto end; |
2f77fc4b | 3068 | } |
b178f53e JG |
3069 | end: |
3070 | return ret_code; | |
3071 | } | |
3072 | ||
3073 | static | |
3074 | enum lttng_error_code cmd_create_session_from_descriptor( | |
3075 | struct lttng_session_descriptor *descriptor, | |
3076 | const lttng_sock_cred *creds, | |
3077 | const char *home_path) | |
3078 | { | |
3079 | int ret; | |
3080 | enum lttng_error_code ret_code; | |
3081 | const char *session_name; | |
3082 | struct ltt_session *new_session = NULL; | |
3083 | enum lttng_session_descriptor_status descriptor_status; | |
2f77fc4b | 3084 | |
e32d7f27 | 3085 | session_lock_list(); |
b178f53e JG |
3086 | if (home_path) { |
3087 | if (*home_path != '/') { | |
3088 | ERR("Home path provided by client is not absolute"); | |
3089 | ret_code = LTTNG_ERR_INVALID; | |
3090 | goto end; | |
3091 | } | |
3092 | } | |
2f77fc4b | 3093 | |
b178f53e JG |
3094 | descriptor_status = lttng_session_descriptor_get_session_name( |
3095 | descriptor, &session_name); | |
3096 | switch (descriptor_status) { | |
3097 | case LTTNG_SESSION_DESCRIPTOR_STATUS_OK: | |
3098 | break; | |
3099 | case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET: | |
3100 | session_name = NULL; | |
3101 | break; | |
3102 | default: | |
3103 | ret_code = LTTNG_ERR_INVALID; | |
3104 | goto end; | |
3105 | } | |
e3876bf0 | 3106 | |
b178f53e | 3107 | ret_code = session_create(session_name, creds->uid, creds->gid, |
e3876bf0 | 3108 | &new_session); |
b178f53e | 3109 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3110 | goto end; |
2f77fc4b DG |
3111 | } |
3112 | ||
b178f53e JG |
3113 | if (!session_name) { |
3114 | ret = lttng_session_descriptor_set_session_name(descriptor, | |
3115 | new_session->name); | |
3116 | if (ret) { | |
3117 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3118 | goto end; | |
3119 | } | |
3120 | } | |
3121 | ||
3122 | if (!lttng_session_descriptor_is_output_destination_initialized( | |
3123 | descriptor)) { | |
3124 | /* | |
3125 | * Only include the session's creation time in the output | |
3126 | * destination if the name of the session itself was | |
3127 | * not auto-generated. | |
3128 | */ | |
3129 | ret_code = lttng_session_descriptor_set_default_output( | |
3130 | descriptor, | |
3131 | session_name ? &new_session->creation_time : NULL, | |
3132 | home_path); | |
3133 | if (ret_code != LTTNG_OK) { | |
e32d7f27 | 3134 | goto end; |
2bba9e53 | 3135 | } |
2bba9e53 | 3136 | } else { |
b178f53e JG |
3137 | new_session->has_user_specified_directory = |
3138 | lttng_session_descriptor_has_output_directory( | |
3139 | descriptor); | |
2f77fc4b DG |
3140 | } |
3141 | ||
b178f53e JG |
3142 | switch (lttng_session_descriptor_get_type(descriptor)) { |
3143 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3144 | new_session->snapshot_mode = 1; | |
3145 | break; | |
3146 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3147 | new_session->live_timer = | |
3148 | lttng_session_descriptor_live_get_timer_interval( | |
3149 | descriptor); | |
3150 | break; | |
3151 | default: | |
3152 | break; | |
3153 | } | |
2f77fc4b | 3154 | |
b178f53e JG |
3155 | ret_code = set_session_output_from_descriptor(new_session, descriptor); |
3156 | if (ret_code != LTTNG_OK) { | |
3157 | goto end; | |
3158 | } | |
3159 | new_session->consumer->enabled = 1; | |
3160 | ret_code = LTTNG_OK; | |
e32d7f27 | 3161 | end: |
b178f53e JG |
3162 | /* Release reference provided by the session_create function. */ |
3163 | session_put(new_session); | |
3164 | if (ret_code != LTTNG_OK && new_session) { | |
3165 | /* Release the global reference on error. */ | |
3166 | session_destroy(new_session); | |
e32d7f27 | 3167 | } |
b178f53e JG |
3168 | session_unlock_list(); |
3169 | return ret_code; | |
2f77fc4b DG |
3170 | } |
3171 | ||
b178f53e JG |
3172 | enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock, |
3173 | struct lttng_session_descriptor **return_descriptor) | |
27babd3a DG |
3174 | { |
3175 | int ret; | |
b178f53e JG |
3176 | size_t payload_size; |
3177 | struct lttng_dynamic_buffer payload; | |
3178 | struct lttng_buffer_view home_dir_view; | |
3179 | struct lttng_buffer_view session_descriptor_view; | |
3180 | struct lttng_session_descriptor *session_descriptor = NULL; | |
3181 | enum lttng_error_code ret_code; | |
3182 | ||
3183 | lttng_dynamic_buffer_init(&payload); | |
3184 | if (cmd_ctx->lsm->u.create_session.home_dir_size >= | |
3185 | LTTNG_PATH_MAX) { | |
3186 | ret_code = LTTNG_ERR_INVALID; | |
3187 | goto error; | |
27babd3a | 3188 | } |
b178f53e JG |
3189 | if (cmd_ctx->lsm->u.create_session.session_descriptor_size > |
3190 | LTTNG_SESSION_DESCRIPTOR_MAX_LEN) { | |
3191 | ret_code = LTTNG_ERR_INVALID; | |
3192 | goto error; | |
27babd3a DG |
3193 | } |
3194 | ||
b178f53e JG |
3195 | payload_size = cmd_ctx->lsm->u.create_session.home_dir_size + |
3196 | cmd_ctx->lsm->u.create_session.session_descriptor_size; | |
3197 | ret = lttng_dynamic_buffer_set_size(&payload, payload_size); | |
3198 | if (ret) { | |
3199 | ret_code = LTTNG_ERR_NOMEM; | |
3200 | goto error; | |
27babd3a DG |
3201 | } |
3202 | ||
b178f53e JG |
3203 | ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size); |
3204 | if (ret <= 0) { | |
3205 | ERR("Reception of session descriptor failed, aborting."); | |
3206 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3207 | goto error; | |
27babd3a DG |
3208 | } |
3209 | ||
b178f53e JG |
3210 | home_dir_view = lttng_buffer_view_from_dynamic_buffer( |
3211 | &payload, | |
3212 | 0, | |
3213 | cmd_ctx->lsm->u.create_session.home_dir_size); | |
3214 | session_descriptor_view = lttng_buffer_view_from_dynamic_buffer( | |
3215 | &payload, | |
3216 | cmd_ctx->lsm->u.create_session.home_dir_size, | |
3217 | cmd_ctx->lsm->u.create_session.session_descriptor_size); | |
27babd3a | 3218 | |
b178f53e JG |
3219 | ret = lttng_session_descriptor_create_from_buffer( |
3220 | &session_descriptor_view, &session_descriptor); | |
3221 | if (ret < 0) { | |
3222 | ERR("Failed to create session descriptor from payload of \"create session\" command"); | |
3223 | ret_code = LTTNG_ERR_INVALID; | |
3224 | goto error; | |
3225 | } | |
27babd3a | 3226 | |
b178f53e JG |
3227 | /* |
3228 | * Sets the descriptor's auto-generated properties (name, output) if | |
3229 | * needed. | |
3230 | */ | |
3231 | ret_code = cmd_create_session_from_descriptor(session_descriptor, | |
3232 | &cmd_ctx->creds, | |
3233 | home_dir_view.size ? home_dir_view.data : NULL); | |
3234 | if (ret_code != LTTNG_OK) { | |
3235 | goto error; | |
e32d7f27 | 3236 | } |
b178f53e JG |
3237 | |
3238 | ret_code = LTTNG_OK; | |
3239 | *return_descriptor = session_descriptor; | |
3240 | session_descriptor = NULL; | |
3241 | error: | |
3242 | lttng_dynamic_buffer_reset(&payload); | |
3243 | lttng_session_descriptor_destroy(session_descriptor); | |
3244 | return ret_code; | |
27babd3a DG |
3245 | } |
3246 | ||
3e3665b8 JG |
3247 | static |
3248 | void cmd_destroy_session_reply(const struct ltt_session *session, | |
3249 | void *_reply_context) | |
3250 | { | |
3251 | int ret; | |
3252 | ssize_t comm_ret; | |
3253 | const struct cmd_destroy_session_reply_context *reply_context = | |
3254 | _reply_context; | |
3255 | struct lttng_dynamic_buffer payload; | |
3256 | struct lttcomm_session_destroy_command_header cmd_header; | |
3257 | struct lttng_trace_archive_location *location = NULL; | |
3258 | struct lttcomm_lttng_msg llm = { | |
3259 | .cmd_type = LTTNG_DESTROY_SESSION, | |
3285a971 | 3260 | .ret_code = reply_context->destruction_status, |
3e3665b8 JG |
3261 | .pid = UINT32_MAX, |
3262 | .cmd_header_size = | |
3263 | sizeof(struct lttcomm_session_destroy_command_header), | |
3264 | .data_size = 0, | |
3265 | }; | |
3266 | size_t payload_size_before_location; | |
3267 | ||
3268 | lttng_dynamic_buffer_init(&payload); | |
3269 | ||
3270 | ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm)); | |
3271 | if (ret) { | |
3272 | ERR("Failed to append session destruction message"); | |
3273 | goto error; | |
3274 | } | |
3275 | ||
3276 | cmd_header.rotation_state = | |
3277 | (int32_t) (reply_context->implicit_rotation_on_destroy ? | |
3278 | session->rotation_state : | |
3279 | LTTNG_ROTATION_STATE_NO_ROTATION); | |
3280 | ret = lttng_dynamic_buffer_append(&payload, &cmd_header, | |
3281 | sizeof(cmd_header)); | |
3282 | if (ret) { | |
3283 | ERR("Failed to append session destruction command header"); | |
3284 | goto error; | |
3285 | } | |
3286 | ||
3287 | if (!reply_context->implicit_rotation_on_destroy) { | |
3288 | DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply", | |
3289 | session->name); | |
3290 | goto send_reply; | |
3291 | } | |
3292 | if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) { | |
3293 | DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply", | |
3294 | session->name); | |
3295 | goto send_reply; | |
3296 | } | |
3297 | ||
3298 | location = session_get_trace_archive_location(session); | |
3299 | if (!location) { | |
3300 | ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"", | |
3301 | session->name); | |
3302 | goto error; | |
3303 | } | |
3304 | ||
3305 | payload_size_before_location = payload.size; | |
3306 | comm_ret = lttng_trace_archive_location_serialize(location, | |
3307 | &payload); | |
3308 | if (comm_ret < 0) { | |
3309 | ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"", | |
3310 | session->name); | |
3311 | goto error; | |
3312 | } | |
3313 | /* Update the message to indicate the location's length. */ | |
3314 | ((struct lttcomm_lttng_msg *) payload.data)->data_size = | |
3315 | payload.size - payload_size_before_location; | |
3316 | send_reply: | |
3317 | comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd, | |
3318 | payload.data, payload.size); | |
3319 | if (comm_ret != (ssize_t) payload.size) { | |
3320 | ERR("Failed to send result of the destruction of session \"%s\" to client", | |
3321 | session->name); | |
3322 | } | |
3323 | error: | |
3324 | ret = close(reply_context->reply_sock_fd); | |
3325 | if (ret) { | |
3326 | PERROR("Failed to close client socket in deferred session destroy reply"); | |
3327 | } | |
3328 | lttng_dynamic_buffer_reset(&payload); | |
3329 | free(_reply_context); | |
3330 | } | |
3331 | ||
2f77fc4b DG |
3332 | /* |
3333 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
3334 | * |
3335 | * Called with session lock held. | |
2f77fc4b | 3336 | */ |
e32d7f27 | 3337 | int cmd_destroy_session(struct ltt_session *session, |
3e3665b8 JG |
3338 | struct notification_thread_handle *notification_thread_handle, |
3339 | int *sock_fd) | |
2f77fc4b DG |
3340 | { |
3341 | int ret; | |
3285a971 | 3342 | enum lttng_error_code destruction_last_error = LTTNG_OK; |
3e3665b8 JG |
3343 | struct cmd_destroy_session_reply_context *reply_context = NULL; |
3344 | ||
3345 | if (sock_fd) { | |
3346 | reply_context = zmalloc(sizeof(*reply_context)); | |
3347 | if (!reply_context) { | |
3348 | ret = LTTNG_ERR_NOMEM; | |
3349 | goto end; | |
3350 | } | |
3351 | reply_context->reply_sock_fd = *sock_fd; | |
3352 | } | |
2f77fc4b DG |
3353 | |
3354 | /* Safety net */ | |
3355 | assert(session); | |
3356 | ||
3e3665b8 JG |
3357 | DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, |
3358 | session->id); | |
3359 | if (session->active) { | |
3360 | DBG("Session \"%s\" is active, attempting to stop it before destroying it", | |
3361 | session->name); | |
3362 | ret = cmd_stop_trace(session); | |
3363 | if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
3364 | /* Carry on with the destruction of the session. */ | |
3365 | ERR("Failed to stop session \"%s\" as part of its destruction: %s", | |
3366 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3367 | destruction_last_error = ret; |
3e3665b8 JG |
3368 | } |
3369 | } | |
5c408ad8 | 3370 | |
92816cc3 JG |
3371 | if (session->rotation_schedule_timer_enabled) { |
3372 | if (timer_session_rotation_schedule_timer_stop( | |
3373 | session)) { | |
3374 | ERR("Failed to stop the \"rotation schedule\" timer of session %s", | |
3375 | session->name); | |
3285a971 | 3376 | destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR; |
92816cc3 | 3377 | } |
259c2674 JD |
3378 | } |
3379 | ||
90936dcf JD |
3380 | if (session->rotate_size) { |
3381 | unsubscribe_session_consumed_size_rotation(session, notification_thread_handle); | |
3382 | session->rotate_size = 0; | |
3383 | } | |
3384 | ||
a7ceb342 | 3385 | if (session->rotated && session->current_trace_chunk && session->output_traces) { |
b5893d8e JG |
3386 | /* |
3387 | * Perform a last rotation on destruction if rotations have | |
3388 | * occurred during the session's lifetime. | |
3389 | */ | |
343defc2 MD |
3390 | ret = cmd_rotate_session(session, NULL, false, |
3391 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
d2956687 JG |
3392 | if (ret != LTTNG_OK) { |
3393 | ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s", | |
3394 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3395 | destruction_last_error = -ret; |
124473a3 | 3396 | } |
3e3665b8 JG |
3397 | if (reply_context) { |
3398 | reply_context->implicit_rotation_on_destroy = true; | |
3399 | } | |
070b6a86 | 3400 | } else if (session->has_been_started && session->current_trace_chunk) { |
7fdbed1c JG |
3401 | /* |
3402 | * The user has not triggered a session rotation. However, to | |
3403 | * ensure all data has been consumed, the session is rotated | |
3404 | * to a 'null' trace chunk before it is destroyed. | |
3405 | * | |
3406 | * This is a "quiet" rotation meaning that no notification is | |
3407 | * emitted and no renaming of the current trace chunk takes | |
3408 | * place. | |
3409 | */ | |
343defc2 MD |
3410 | ret = cmd_rotate_session(session, NULL, true, |
3411 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
53fb6336 JG |
3412 | /* |
3413 | * Rotation operations may not be supported by the kernel | |
3414 | * tracer. Hence, do not consider this implicit rotation as | |
3415 | * a session destruction error. The library has already stopped | |
3416 | * the session and waited for pending data; there is nothing | |
3417 | * left to do but complete the destruction of the session. | |
3418 | */ | |
3419 | if (ret != LTTNG_OK && | |
3420 | ret != -LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) { | |
7fdbed1c | 3421 | ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s", |
53fb6336 | 3422 | session->name, lttng_strerror(ret)); |
3285a971 | 3423 | destruction_last_error = -ret; |
7fdbed1c JG |
3424 | } |
3425 | } | |
5c408ad8 | 3426 | |
a503e1ef JG |
3427 | if (session->shm_path[0]) { |
3428 | /* | |
3429 | * When a session is created with an explicit shm_path, | |
3430 | * the consumer daemon will create its shared memory files | |
3431 | * at that location and will *not* unlink them. This is normal | |
3432 | * as the intention of that feature is to make it possible | |
3433 | * to retrieve the content of those files should a crash occur. | |
3434 | * | |
3435 | * To ensure the content of those files can be used, the | |
3436 | * sessiond daemon will replicate the content of the metadata | |
3437 | * cache in a metadata file. | |
3438 | * | |
3439 | * On clean-up, it is expected that the consumer daemon will | |
3440 | * unlink the shared memory files and that the session daemon | |
3441 | * will unlink the metadata file. Then, the session's directory | |
3442 | * in the shm path can be removed. | |
3443 | * | |
3444 | * Unfortunately, a flaw in the design of the sessiond's and | |
3445 | * consumerd's tear down of channels makes it impossible to | |
3446 | * determine when the sessiond _and_ the consumerd have both | |
3447 | * destroyed their representation of a channel. For one, the | |
3448 | * unlinking, close, and rmdir happen in deferred 'call_rcu' | |
3449 | * callbacks in both daemons. | |
3450 | * | |
3451 | * However, it is also impossible for the sessiond to know when | |
3452 | * the consumer daemon is done destroying its channel(s) since | |
3453 | * it occurs as a reaction to the closing of the channel's file | |
3454 | * descriptor. There is no resulting communication initiated | |
3455 | * from the consumerd to the sessiond to confirm that the | |
3456 | * operation is completed (and was successful). | |
3457 | * | |
3458 | * Until this is all fixed, the session daemon checks for the | |
3459 | * removal of the session's shm path which makes it possible | |
3460 | * to safely advertise a session as having been destroyed. | |
3461 | * | |
3462 | * Prior to this fix, it was not possible to reliably save | |
3463 | * a session making use of the --shm-path option, destroy it, | |
3464 | * and load it again. This is because the creation of the | |
3465 | * session would fail upon seeing the session's shm path | |
3466 | * already in existence. | |
3467 | * | |
3468 | * Note that none of the error paths in the check for the | |
3469 | * directory's existence return an error. This is normal | |
3470 | * as there isn't much that can be done. The session will | |
3471 | * be destroyed properly, except that we can't offer the | |
3472 | * guarantee that the same session can be re-created. | |
3473 | */ | |
3474 | current_completion_handler = &destroy_completion_handler.handler; | |
3475 | ret = lttng_strncpy(destroy_completion_handler.shm_path, | |
3476 | session->shm_path, | |
3477 | sizeof(destroy_completion_handler.shm_path)); | |
3478 | assert(!ret); | |
3479 | } | |
e32d7f27 JG |
3480 | |
3481 | /* | |
3482 | * The session is destroyed. However, note that the command context | |
3483 | * still holds a reference to the session, thus delaying its destruction | |
3484 | * _at least_ up to the point when that reference is released. | |
3485 | */ | |
3486 | session_destroy(session); | |
3e3665b8 | 3487 | if (reply_context) { |
3285a971 | 3488 | reply_context->destruction_status = destruction_last_error; |
3e3665b8 JG |
3489 | ret = session_add_destroy_notifier(session, |
3490 | cmd_destroy_session_reply, | |
3491 | (void *) reply_context); | |
3492 | if (ret) { | |
3493 | ret = LTTNG_ERR_FATAL; | |
3494 | goto end; | |
3495 | } else { | |
3496 | *sock_fd = -1; | |
3497 | } | |
3498 | } | |
3499 | ret = LTTNG_OK; | |
3500 | end: | |
2f77fc4b DG |
3501 | return ret; |
3502 | } | |
3503 | ||
2f77fc4b DG |
3504 | /* |
3505 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3506 | */ | |
56a37563 JG |
3507 | int cmd_register_consumer(struct ltt_session *session, |
3508 | enum lttng_domain_type domain, const char *sock_path, | |
3509 | struct consumer_data *cdata) | |
2f77fc4b DG |
3510 | { |
3511 | int ret, sock; | |
dd81b457 | 3512 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
3513 | |
3514 | assert(session); | |
3515 | assert(cdata); | |
3516 | assert(sock_path); | |
3517 | ||
3518 | switch (domain) { | |
3519 | case LTTNG_DOMAIN_KERNEL: | |
3520 | { | |
3521 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3522 | ||
3523 | assert(ksess); | |
3524 | ||
3525 | /* Can't register a consumer if there is already one */ | |
3526 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 3527 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
3528 | goto error; |
3529 | } | |
3530 | ||
3531 | sock = lttcomm_connect_unix_sock(sock_path); | |
3532 | if (sock < 0) { | |
f73fabfd | 3533 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
3534 | goto error; |
3535 | } | |
4ce514c4 | 3536 | cdata->cmd_sock = sock; |
2f77fc4b | 3537 | |
4ce514c4 | 3538 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 3539 | if (socket == NULL) { |
f66c074c DG |
3540 | ret = close(sock); |
3541 | if (ret < 0) { | |
3542 | PERROR("close register consumer"); | |
3543 | } | |
4ce514c4 | 3544 | cdata->cmd_sock = -1; |
f73fabfd | 3545 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3546 | goto error; |
3547 | } | |
3548 | ||
3549 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
3550 | if (socket->lock == NULL) { | |
3551 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 3552 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3553 | goto error; |
3554 | } | |
3555 | pthread_mutex_init(socket->lock, NULL); | |
3556 | socket->registered = 1; | |
3557 | ||
3558 | rcu_read_lock(); | |
3559 | consumer_add_socket(socket, ksess->consumer); | |
3560 | rcu_read_unlock(); | |
3561 | ||
3562 | pthread_mutex_lock(&cdata->pid_mutex); | |
3563 | cdata->pid = -1; | |
3564 | pthread_mutex_unlock(&cdata->pid_mutex); | |
3565 | ||
3566 | break; | |
3567 | } | |
3568 | default: | |
3569 | /* TODO: Userspace tracing */ | |
f73fabfd | 3570 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3571 | goto error; |
3572 | } | |
3573 | ||
dd81b457 | 3574 | return LTTNG_OK; |
2f77fc4b DG |
3575 | |
3576 | error: | |
dd81b457 DG |
3577 | if (socket) { |
3578 | consumer_destroy_socket(socket); | |
3579 | } | |
2f77fc4b DG |
3580 | return ret; |
3581 | } | |
3582 | ||
3583 | /* | |
3584 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3585 | */ | |
3586 | ssize_t cmd_list_domains(struct ltt_session *session, | |
3587 | struct lttng_domain **domains) | |
3588 | { | |
3589 | int ret, index = 0; | |
3590 | ssize_t nb_dom = 0; | |
fefd409b DG |
3591 | struct agent *agt; |
3592 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
3593 | |
3594 | if (session->kernel_session != NULL) { | |
3595 | DBG3("Listing domains found kernel domain"); | |
3596 | nb_dom++; | |
3597 | } | |
3598 | ||
3599 | if (session->ust_session != NULL) { | |
3600 | DBG3("Listing domains found UST global domain"); | |
3601 | nb_dom++; | |
3c6a091f | 3602 | |
e0a74f01 | 3603 | rcu_read_lock(); |
fefd409b DG |
3604 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3605 | agt, node.node) { | |
3606 | if (agt->being_used) { | |
3607 | nb_dom++; | |
3608 | } | |
3c6a091f | 3609 | } |
e0a74f01 | 3610 | rcu_read_unlock(); |
2f77fc4b DG |
3611 | } |
3612 | ||
fa64dfb4 JG |
3613 | if (!nb_dom) { |
3614 | goto end; | |
3615 | } | |
3616 | ||
2f77fc4b DG |
3617 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
3618 | if (*domains == NULL) { | |
f73fabfd | 3619 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3620 | goto error; |
3621 | } | |
3622 | ||
3623 | if (session->kernel_session != NULL) { | |
3624 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
b5edb9e8 PP |
3625 | |
3626 | /* Kernel session buffer type is always GLOBAL */ | |
3627 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
3628 | ||
2f77fc4b DG |
3629 | index++; |
3630 | } | |
3631 | ||
3632 | if (session->ust_session != NULL) { | |
3633 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 3634 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 3635 | index++; |
3c6a091f | 3636 | |
e0a74f01 | 3637 | rcu_read_lock(); |
fefd409b DG |
3638 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3639 | agt, node.node) { | |
3640 | if (agt->being_used) { | |
3641 | (*domains)[index].type = agt->domain; | |
3642 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
3643 | index++; | |
3644 | } | |
3c6a091f | 3645 | } |
e0a74f01 | 3646 | rcu_read_unlock(); |
2f77fc4b | 3647 | } |
fa64dfb4 | 3648 | end: |
2f77fc4b DG |
3649 | return nb_dom; |
3650 | ||
3651 | error: | |
f73fabfd DG |
3652 | /* Return negative value to differentiate return code */ |
3653 | return -ret; | |
2f77fc4b DG |
3654 | } |
3655 | ||
3656 | ||
3657 | /* | |
3658 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3659 | */ | |
56a37563 JG |
3660 | ssize_t cmd_list_channels(enum lttng_domain_type domain, |
3661 | struct ltt_session *session, struct lttng_channel **channels) | |
2f77fc4b | 3662 | { |
53e367f9 | 3663 | ssize_t nb_chan = 0, payload_size = 0, ret; |
2f77fc4b DG |
3664 | |
3665 | switch (domain) { | |
3666 | case LTTNG_DOMAIN_KERNEL: | |
3667 | if (session->kernel_session != NULL) { | |
3668 | nb_chan = session->kernel_session->channel_count; | |
3669 | } | |
3670 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 | 3671 | if (nb_chan <= 0) { |
53e367f9 JG |
3672 | ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
3673 | goto end; | |
c7d620a2 | 3674 | } |
2f77fc4b DG |
3675 | break; |
3676 | case LTTNG_DOMAIN_UST: | |
3677 | if (session->ust_session != NULL) { | |
7ffc31a2 | 3678 | rcu_read_lock(); |
2f77fc4b | 3679 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
3680 | session->ust_session->domain_global.channels); |
3681 | rcu_read_unlock(); | |
2f77fc4b DG |
3682 | } |
3683 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 3684 | if (nb_chan < 0) { |
53e367f9 JG |
3685 | ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND; |
3686 | goto end; | |
c7d620a2 | 3687 | } |
2f77fc4b DG |
3688 | break; |
3689 | default: | |
53e367f9 JG |
3690 | ret = -LTTNG_ERR_UND; |
3691 | goto end; | |
2f77fc4b DG |
3692 | } |
3693 | ||
3694 | if (nb_chan > 0) { | |
53e367f9 | 3695 | const size_t channel_size = sizeof(struct lttng_channel) + |
cf0bcb51 JG |
3696 | sizeof(struct lttng_channel_extended); |
3697 | struct lttng_channel_extended *channel_exts; | |
53e367f9 JG |
3698 | |
3699 | payload_size = nb_chan * channel_size; | |
3700 | *channels = zmalloc(payload_size); | |
2f77fc4b | 3701 | if (*channels == NULL) { |
53e367f9 JG |
3702 | ret = -LTTNG_ERR_FATAL; |
3703 | goto end; | |
2f77fc4b DG |
3704 | } |
3705 | ||
53e367f9 JG |
3706 | channel_exts = ((void *) *channels) + |
3707 | (nb_chan * sizeof(struct lttng_channel)); | |
d449df4a MD |
3708 | ret = list_lttng_channels(domain, session, *channels, channel_exts); |
3709 | if (ret != LTTNG_OK) { | |
3710 | free(*channels); | |
3711 | *channels = NULL; | |
3712 | goto end; | |
3713 | } | |
53e367f9 JG |
3714 | } else { |
3715 | *channels = NULL; | |
2f77fc4b DG |
3716 | } |
3717 | ||
53e367f9 JG |
3718 | ret = payload_size; |
3719 | end: | |
3720 | return ret; | |
2f77fc4b DG |
3721 | } |
3722 | ||
3723 | /* | |
3724 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3725 | */ | |
56a37563 JG |
3726 | ssize_t cmd_list_events(enum lttng_domain_type domain, |
3727 | struct ltt_session *session, char *channel_name, | |
b4e3ceb9 | 3728 | struct lttng_event **events, size_t *total_size) |
2f77fc4b DG |
3729 | { |
3730 | int ret = 0; | |
3731 | ssize_t nb_event = 0; | |
3732 | ||
3733 | switch (domain) { | |
3734 | case LTTNG_DOMAIN_KERNEL: | |
3735 | if (session->kernel_session != NULL) { | |
3736 | nb_event = list_lttng_kernel_events(channel_name, | |
b4e3ceb9 PP |
3737 | session->kernel_session, events, |
3738 | total_size); | |
2f77fc4b DG |
3739 | } |
3740 | break; | |
3741 | case LTTNG_DOMAIN_UST: | |
3742 | { | |
3743 | if (session->ust_session != NULL) { | |
3744 | nb_event = list_lttng_ust_global_events(channel_name, | |
b4e3ceb9 PP |
3745 | &session->ust_session->domain_global, events, |
3746 | total_size); | |
2f77fc4b DG |
3747 | } |
3748 | break; | |
3749 | } | |
5cdb6027 | 3750 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3751 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3752 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3753 | if (session->ust_session) { |
fefd409b DG |
3754 | struct lttng_ht_iter iter; |
3755 | struct agent *agt; | |
3756 | ||
b11feea5 | 3757 | rcu_read_lock(); |
fefd409b DG |
3758 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
3759 | &iter.iter, agt, node.node) { | |
1dfd9906 JG |
3760 | if (agt->domain == domain) { |
3761 | nb_event = list_lttng_agent_events( | |
b4e3ceb9 PP |
3762 | agt, events, |
3763 | total_size); | |
1dfd9906 JG |
3764 | break; |
3765 | } | |
fefd409b | 3766 | } |
b11feea5 | 3767 | rcu_read_unlock(); |
3c6a091f DG |
3768 | } |
3769 | break; | |
2f77fc4b | 3770 | default: |
f73fabfd | 3771 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3772 | goto error; |
3773 | } | |
3774 | ||
f73fabfd | 3775 | return nb_event; |
2f77fc4b DG |
3776 | |
3777 | error: | |
f73fabfd DG |
3778 | /* Return negative value to differentiate return code */ |
3779 | return -ret; | |
2f77fc4b DG |
3780 | } |
3781 | ||
3782 | /* | |
3783 | * Using the session list, filled a lttng_session array to send back to the | |
3784 | * client for session listing. | |
3785 | * | |
3786 | * The session list lock MUST be acquired before calling this function. Use | |
3787 | * session_lock_list() and session_unlock_list(). | |
3788 | */ | |
b178f53e JG |
3789 | void cmd_list_lttng_sessions(struct lttng_session *sessions, |
3790 | size_t session_count, uid_t uid, gid_t gid) | |
2f77fc4b DG |
3791 | { |
3792 | int ret; | |
3793 | unsigned int i = 0; | |
3794 | struct ltt_session *session; | |
3795 | struct ltt_session_list *list = session_get_list(); | |
b178f53e JG |
3796 | struct lttng_session_extended *extended = |
3797 | (typeof(extended)) (&sessions[session_count]); | |
2f77fc4b DG |
3798 | |
3799 | DBG("Getting all available session for UID %d GID %d", | |
3800 | uid, gid); | |
3801 | /* | |
3802 | * Iterate over session list and append data after the control struct in | |
3803 | * the buffer. | |
3804 | */ | |
3805 | cds_list_for_each_entry(session, &list->head, list) { | |
e32d7f27 JG |
3806 | if (!session_get(session)) { |
3807 | continue; | |
3808 | } | |
2f77fc4b DG |
3809 | /* |
3810 | * Only list the sessions the user can control. | |
3811 | */ | |
e32d7f27 JG |
3812 | if (!session_access_ok(session, uid, gid) || |
3813 | session->destroyed) { | |
3814 | session_put(session); | |
2f77fc4b DG |
3815 | continue; |
3816 | } | |
3817 | ||
3818 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3819 | struct ltt_ust_session *usess = session->ust_session; | |
3820 | ||
3821 | if (session->consumer->type == CONSUMER_DST_NET || | |
3822 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
3823 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3824 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 3825 | sizeof(sessions[i].path), session); |
2f77fc4b | 3826 | } else { |
dec56f6c | 3827 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
366a9222 | 3828 | session->consumer->dst.session_root_path); |
2f77fc4b DG |
3829 | } |
3830 | if (ret < 0) { | |
3831 | PERROR("snprintf session path"); | |
e32d7f27 | 3832 | session_put(session); |
2f77fc4b DG |
3833 | continue; |
3834 | } | |
3835 | ||
3836 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
3837 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 3838 | sessions[i].enabled = session->active; |
2cbf8fed | 3839 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 3840 | sessions[i].live_timer_interval = session->live_timer; |
b178f53e JG |
3841 | extended[i].creation_time.value = (uint64_t) session->creation_time; |
3842 | extended[i].creation_time.is_set = 1; | |
2f77fc4b | 3843 | i++; |
e32d7f27 | 3844 | session_put(session); |
2f77fc4b DG |
3845 | } |
3846 | } | |
3847 | ||
806e2684 | 3848 | /* |
6d805429 | 3849 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 3850 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 3851 | */ |
6d805429 | 3852 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
3853 | { |
3854 | int ret; | |
3855 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3856 | struct ltt_ust_session *usess = session->ust_session; | |
3857 | ||
3858 | assert(session); | |
3859 | ||
5c408ad8 JD |
3860 | DBG("Data pending for session %s", session->name); |
3861 | ||
806e2684 | 3862 | /* Session MUST be stopped to ask for data availability. */ |
8382cf6f | 3863 | if (session->active) { |
806e2684 DG |
3864 | ret = LTTNG_ERR_SESSION_STARTED; |
3865 | goto error; | |
3a89d11a DG |
3866 | } else { |
3867 | /* | |
3868 | * If stopped, just make sure we've started before else the above call | |
3869 | * will always send that there is data pending. | |
3870 | * | |
3871 | * The consumer assumes that when the data pending command is received, | |
3872 | * the trace has been started before or else no output data is written | |
3873 | * by the streams which is a condition for data pending. So, this is | |
3874 | * *VERY* important that we don't ask the consumer before a start | |
3875 | * trace. | |
3876 | */ | |
8382cf6f | 3877 | if (!session->has_been_started) { |
3a89d11a DG |
3878 | ret = 0; |
3879 | goto error; | |
3880 | } | |
806e2684 DG |
3881 | } |
3882 | ||
92816cc3 JG |
3883 | /* A rotation is still pending, we have to wait. */ |
3884 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { | |
5c408ad8 JD |
3885 | DBG("Rotate still pending for session %s", session->name); |
3886 | ret = 1; | |
3887 | goto error; | |
3888 | } | |
3889 | ||
806e2684 | 3890 | if (ksess && ksess->consumer) { |
6d805429 DG |
3891 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
3892 | if (ret == 1) { | |
806e2684 DG |
3893 | /* Data is still being extracted for the kernel. */ |
3894 | goto error; | |
3895 | } | |
3896 | } | |
3897 | ||
3898 | if (usess && usess->consumer) { | |
6d805429 DG |
3899 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
3900 | if (ret == 1) { | |
806e2684 DG |
3901 | /* Data is still being extracted for the kernel. */ |
3902 | goto error; | |
3903 | } | |
3904 | } | |
3905 | ||
3906 | /* Data is ready to be read by a viewer */ | |
6d805429 | 3907 | ret = 0; |
806e2684 DG |
3908 | |
3909 | error: | |
3910 | return ret; | |
3911 | } | |
3912 | ||
6dc3064a DG |
3913 | /* |
3914 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
3915 | * | |
3916 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3917 | */ | |
3918 | int cmd_snapshot_add_output(struct ltt_session *session, | |
df4f5a87 | 3919 | const struct lttng_snapshot_output *output, uint32_t *id) |
6dc3064a DG |
3920 | { |
3921 | int ret; | |
3922 | struct snapshot_output *new_output; | |
3923 | ||
3924 | assert(session); | |
3925 | assert(output); | |
3926 | ||
3927 | DBG("Cmd snapshot add output for session %s", session->name); | |
3928 | ||
3929 | /* | |
903ef685 | 3930 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
3931 | */ |
3932 | if (session->output_traces) { | |
903ef685 | 3933 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3934 | goto error; |
3935 | } | |
3936 | ||
54213acc JG |
3937 | if (session->has_non_mmap_channel) { |
3938 | ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED; | |
3939 | goto error; | |
3940 | } | |
3941 | ||
6dc3064a DG |
3942 | /* Only one output is allowed until we have the "tee" feature. */ |
3943 | if (session->snapshot.nb_output == 1) { | |
3944 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
3945 | goto error; | |
3946 | } | |
3947 | ||
3948 | new_output = snapshot_output_alloc(); | |
3949 | if (!new_output) { | |
3950 | ret = LTTNG_ERR_NOMEM; | |
3951 | goto error; | |
3952 | } | |
3953 | ||
b178f53e | 3954 | ret = snapshot_output_init(session, output->max_size, output->name, |
6dc3064a DG |
3955 | output->ctrl_url, output->data_url, session->consumer, new_output, |
3956 | &session->snapshot); | |
3957 | if (ret < 0) { | |
3958 | if (ret == -ENOMEM) { | |
3959 | ret = LTTNG_ERR_NOMEM; | |
3960 | } else { | |
3961 | ret = LTTNG_ERR_INVALID; | |
3962 | } | |
3963 | goto free_error; | |
3964 | } | |
3965 | ||
6dc3064a DG |
3966 | rcu_read_lock(); |
3967 | snapshot_add_output(&session->snapshot, new_output); | |
3968 | if (id) { | |
3969 | *id = new_output->id; | |
3970 | } | |
3971 | rcu_read_unlock(); | |
3972 | ||
3973 | return LTTNG_OK; | |
3974 | ||
3975 | free_error: | |
3976 | snapshot_output_destroy(new_output); | |
3977 | error: | |
3978 | return ret; | |
3979 | } | |
3980 | ||
3981 | /* | |
3982 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
3983 | * | |
3984 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3985 | */ | |
3986 | int cmd_snapshot_del_output(struct ltt_session *session, | |
df4f5a87 | 3987 | const struct lttng_snapshot_output *output) |
6dc3064a DG |
3988 | { |
3989 | int ret; | |
eb240553 | 3990 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
3991 | |
3992 | assert(session); | |
3993 | assert(output); | |
3994 | ||
6dc3064a DG |
3995 | rcu_read_lock(); |
3996 | ||
3997 | /* | |
d3f14b8a MD |
3998 | * Permission denied to create an output if the session is not |
3999 | * set in no output mode. | |
6dc3064a DG |
4000 | */ |
4001 | if (session->output_traces) { | |
903ef685 | 4002 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4003 | goto error; |
4004 | } | |
4005 | ||
eb240553 DG |
4006 | if (output->id) { |
4007 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
4008 | session->name); | |
4009 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
4010 | } else if (*output->name != '\0') { | |
4011 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
4012 | session->name); | |
4013 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
4014 | } | |
6dc3064a DG |
4015 | if (!sout) { |
4016 | ret = LTTNG_ERR_INVALID; | |
4017 | goto error; | |
4018 | } | |
4019 | ||
4020 | snapshot_delete_output(&session->snapshot, sout); | |
4021 | snapshot_output_destroy(sout); | |
4022 | ret = LTTNG_OK; | |
4023 | ||
4024 | error: | |
4025 | rcu_read_unlock(); | |
4026 | return ret; | |
4027 | } | |
4028 | ||
4029 | /* | |
4030 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
4031 | * | |
4032 | * If no output is available, outputs is untouched and 0 is returned. | |
4033 | * | |
4034 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
4035 | */ | |
4036 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
4037 | struct lttng_snapshot_output **outputs) | |
4038 | { | |
4039 | int ret, idx = 0; | |
b223ca94 | 4040 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
4041 | struct lttng_ht_iter iter; |
4042 | struct snapshot_output *output; | |
4043 | ||
4044 | assert(session); | |
4045 | assert(outputs); | |
4046 | ||
4047 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
4048 | ||
4049 | /* | |
d3f14b8a MD |
4050 | * Permission denied to create an output if the session is not |
4051 | * set in no output mode. | |
6dc3064a DG |
4052 | */ |
4053 | if (session->output_traces) { | |
903ef685 JG |
4054 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
4055 | goto end; | |
6dc3064a DG |
4056 | } |
4057 | ||
4058 | if (session->snapshot.nb_output == 0) { | |
4059 | ret = 0; | |
903ef685 | 4060 | goto end; |
6dc3064a DG |
4061 | } |
4062 | ||
4063 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
4064 | if (!list) { | |
b223ca94 | 4065 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4066 | goto end; |
6dc3064a DG |
4067 | } |
4068 | ||
4069 | /* Copy list from session to the new list object. */ | |
b223ca94 | 4070 | rcu_read_lock(); |
6dc3064a DG |
4071 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
4072 | output, node.node) { | |
4073 | assert(output->consumer); | |
4074 | list[idx].id = output->id; | |
4075 | list[idx].max_size = output->max_size; | |
6ce22875 MD |
4076 | if (lttng_strncpy(list[idx].name, output->name, |
4077 | sizeof(list[idx].name))) { | |
4078 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4079 | goto error; |
6ce22875 | 4080 | } |
6dc3064a | 4081 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
6ce22875 | 4082 | if (lttng_strncpy(list[idx].ctrl_url, |
366a9222 | 4083 | output->consumer->dst.session_root_path, |
6ce22875 MD |
4084 | sizeof(list[idx].ctrl_url))) { |
4085 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4086 | goto error; |
6ce22875 | 4087 | } |
6dc3064a DG |
4088 | } else { |
4089 | /* Control URI. */ | |
4090 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
4091 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
4092 | if (ret < 0) { | |
b223ca94 | 4093 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4094 | goto error; |
6dc3064a DG |
4095 | } |
4096 | ||
4097 | /* Data URI. */ | |
4098 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
4099 | list[idx].data_url, sizeof(list[idx].data_url)); | |
4100 | if (ret < 0) { | |
b223ca94 | 4101 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4102 | goto error; |
6dc3064a DG |
4103 | } |
4104 | } | |
4105 | idx++; | |
4106 | } | |
4107 | ||
4108 | *outputs = list; | |
b223ca94 JG |
4109 | list = NULL; |
4110 | ret = session->snapshot.nb_output; | |
6dc3064a | 4111 | error: |
903ef685 | 4112 | rcu_read_unlock(); |
b223ca94 | 4113 | free(list); |
903ef685 | 4114 | end: |
b223ca94 | 4115 | return ret; |
6dc3064a DG |
4116 | } |
4117 | ||
93ec662e JD |
4118 | /* |
4119 | * Check if we can regenerate the metadata for this session. | |
4120 | * Only kernel, UST per-uid and non-live sessions are supported. | |
4121 | * | |
4122 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
4123 | */ | |
4124 | static | |
eded6438 | 4125 | int check_regenerate_metadata_support(struct ltt_session *session) |
93ec662e JD |
4126 | { |
4127 | int ret; | |
4128 | ||
4129 | assert(session); | |
4130 | ||
4131 | if (session->live_timer != 0) { | |
4132 | ret = LTTNG_ERR_LIVE_SESSION; | |
4133 | goto end; | |
4134 | } | |
4135 | if (!session->active) { | |
4136 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4137 | goto end; | |
4138 | } | |
4139 | if (session->ust_session) { | |
4140 | switch (session->ust_session->buffer_type) { | |
4141 | case LTTNG_BUFFER_PER_UID: | |
4142 | break; | |
4143 | case LTTNG_BUFFER_PER_PID: | |
4144 | ret = LTTNG_ERR_PER_PID_SESSION; | |
4145 | goto end; | |
4146 | default: | |
4147 | assert(0); | |
4148 | ret = LTTNG_ERR_UNK; | |
4149 | goto end; | |
4150 | } | |
4151 | } | |
4152 | if (session->consumer->type == CONSUMER_DST_NET && | |
4153 | session->consumer->relay_minor_version < 8) { | |
4154 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; | |
4155 | goto end; | |
4156 | } | |
4157 | ret = 0; | |
4158 | ||
4159 | end: | |
4160 | return ret; | |
4161 | } | |
4162 | ||
7802bae3 LL |
4163 | static |
4164 | int clear_metadata_file(int fd) | |
4165 | { | |
4166 | int ret; | |
a5df8828 | 4167 | off_t lseek_ret; |
7802bae3 | 4168 | |
a5df8828 GL |
4169 | lseek_ret = lseek(fd, 0, SEEK_SET); |
4170 | if (lseek_ret < 0) { | |
7802bae3 | 4171 | PERROR("lseek"); |
a5df8828 | 4172 | ret = -1; |
7802bae3 LL |
4173 | goto end; |
4174 | } | |
4175 | ||
4176 | ret = ftruncate(fd, 0); | |
4177 | if (ret < 0) { | |
4178 | PERROR("ftruncate"); | |
4179 | goto end; | |
4180 | } | |
4181 | ||
4182 | end: | |
4183 | return ret; | |
4184 | } | |
4185 | ||
93ec662e | 4186 | static |
eded6438 | 4187 | int ust_regenerate_metadata(struct ltt_ust_session *usess) |
93ec662e JD |
4188 | { |
4189 | int ret = 0; | |
4190 | struct buffer_reg_uid *uid_reg = NULL; | |
4191 | struct buffer_reg_session *session_reg = NULL; | |
4192 | ||
4193 | rcu_read_lock(); | |
4194 | cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { | |
4195 | struct ust_registry_session *registry; | |
4196 | struct ust_registry_channel *chan; | |
4197 | struct lttng_ht_iter iter_chan; | |
4198 | ||
4199 | session_reg = uid_reg->registry; | |
4200 | registry = session_reg->reg.ust; | |
4201 | ||
4202 | pthread_mutex_lock(®istry->lock); | |
4203 | registry->metadata_len_sent = 0; | |
4204 | memset(registry->metadata, 0, registry->metadata_alloc_len); | |
4205 | registry->metadata_len = 0; | |
4206 | registry->metadata_version++; | |
7802bae3 LL |
4207 | if (registry->metadata_fd > 0) { |
4208 | /* Clear the metadata file's content. */ | |
4209 | ret = clear_metadata_file(registry->metadata_fd); | |
4210 | if (ret) { | |
4211 | pthread_mutex_unlock(®istry->lock); | |
4212 | goto end; | |
4213 | } | |
4214 | } | |
4215 | ||
93ec662e JD |
4216 | ret = ust_metadata_session_statedump(registry, NULL, |
4217 | registry->major, registry->minor); | |
4218 | if (ret) { | |
4219 | pthread_mutex_unlock(®istry->lock); | |
4220 | ERR("Failed to generate session metadata (err = %d)", | |
4221 | ret); | |
4222 | goto end; | |
4223 | } | |
4224 | cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, | |
4225 | chan, node.node) { | |
4226 | struct ust_registry_event *event; | |
4227 | struct lttng_ht_iter iter_event; | |
4228 | ||
4229 | ret = ust_metadata_channel_statedump(registry, chan); | |
4230 | if (ret) { | |
4231 | pthread_mutex_unlock(®istry->lock); | |
4232 | ERR("Failed to generate channel metadata " | |
4233 | "(err = %d)", ret); | |
4234 | goto end; | |
4235 | } | |
4236 | cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, | |
4237 | event, node.node) { | |
4238 | ret = ust_metadata_event_statedump(registry, | |
4239 | chan, event); | |
4240 | if (ret) { | |
4241 | pthread_mutex_unlock(®istry->lock); | |
4242 | ERR("Failed to generate event metadata " | |
4243 | "(err = %d)", ret); | |
4244 | goto end; | |
4245 | } | |
4246 | } | |
4247 | } | |
4248 | pthread_mutex_unlock(®istry->lock); | |
4249 | } | |
4250 | ||
4251 | end: | |
4252 | rcu_read_unlock(); | |
4253 | return ret; | |
4254 | } | |
4255 | ||
4256 | /* | |
eded6438 | 4257 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
4258 | * |
4259 | * Ask the consumer to truncate the existing metadata file(s) and | |
4260 | * then regenerate the metadata. Live and per-pid sessions are not | |
4261 | * supported and return an error. | |
4262 | * | |
4263 | * Return 0 on success or else a LTTNG_ERR code. | |
4264 | */ | |
eded6438 | 4265 | int cmd_regenerate_metadata(struct ltt_session *session) |
93ec662e JD |
4266 | { |
4267 | int ret; | |
4268 | ||
4269 | assert(session); | |
4270 | ||
eded6438 | 4271 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
4272 | if (ret) { |
4273 | goto end; | |
4274 | } | |
4275 | ||
4276 | if (session->kernel_session) { | |
eded6438 | 4277 | ret = kernctl_session_regenerate_metadata( |
93ec662e JD |
4278 | session->kernel_session->fd); |
4279 | if (ret < 0) { | |
4280 | ERR("Failed to regenerate the kernel metadata"); | |
4281 | goto end; | |
4282 | } | |
4283 | } | |
4284 | ||
4285 | if (session->ust_session) { | |
eded6438 | 4286 | ret = ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
4287 | if (ret < 0) { |
4288 | ERR("Failed to regenerate the UST metadata"); | |
4289 | goto end; | |
4290 | } | |
4291 | } | |
4292 | DBG("Cmd metadata regenerate for session %s", session->name); | |
4293 | ret = LTTNG_OK; | |
4294 | ||
4295 | end: | |
4296 | return ret; | |
4297 | } | |
4298 | ||
c2561365 JD |
4299 | /* |
4300 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
4301 | * | |
4302 | * Ask the tracer to regenerate a new statedump. | |
4303 | * | |
4304 | * Return 0 on success or else a LTTNG_ERR code. | |
4305 | */ | |
4306 | int cmd_regenerate_statedump(struct ltt_session *session) | |
4307 | { | |
4308 | int ret; | |
4309 | ||
4310 | assert(session); | |
4311 | ||
4312 | if (!session->active) { | |
4313 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4314 | goto end; | |
4315 | } | |
c2561365 JD |
4316 | |
4317 | if (session->kernel_session) { | |
4318 | ret = kernctl_session_regenerate_statedump( | |
4319 | session->kernel_session->fd); | |
4320 | /* | |
4321 | * Currently, the statedump in kernel can only fail if out | |
4322 | * of memory. | |
4323 | */ | |
4324 | if (ret < 0) { | |
4325 | if (ret == -ENOMEM) { | |
4326 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
4327 | } else { | |
4328 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4329 | } | |
4330 | ERR("Failed to regenerate the kernel statedump"); | |
4331 | goto end; | |
4332 | } | |
4333 | } | |
4334 | ||
4335 | if (session->ust_session) { | |
4336 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
4337 | /* | |
4338 | * Currently, the statedump in UST always returns 0. | |
4339 | */ | |
4340 | if (ret < 0) { | |
4341 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4342 | ERR("Failed to regenerate the UST statedump"); | |
4343 | goto end; | |
4344 | } | |
4345 | } | |
4346 | DBG("Cmd regenerate statedump for session %s", session->name); | |
4347 | ret = LTTNG_OK; | |
4348 | ||
4349 | end: | |
4350 | return ret; | |
4351 | } | |
4352 | ||
5024c2ac JR |
4353 | /* TODO: is this the best place to perform this? (code wise) */ |
4354 | /* | |
4355 | * Set sock to -1 if reception of more information is not necessary e.g on | |
4356 | * unregister. TODO find a better way. | |
4357 | * | |
4358 | * On success LTTNG_OK. On error, returns lttng_error code. | |
4359 | * */ | |
4360 | static enum lttng_error_code prepare_trigger_object(struct lttng_trigger *trigger, int sock) | |
4361 | { | |
4362 | enum lttng_error_code ret; | |
4363 | /* Internal object of the trigger might have to "generate" and | |
4364 | * "populate" internal field e.g filter bytecode | |
4365 | */ | |
4366 | struct lttng_condition *condition = NULL; | |
4367 | ||
4368 | condition = lttng_trigger_get_condition(trigger); | |
4369 | if (!condition) { | |
4370 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4371 | goto end; | |
4372 | } | |
4373 | ||
4374 | switch (lttng_condition_get_type(condition)) { | |
4375 | case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT: | |
4376 | { | |
4377 | struct lttng_event_rule *event_rule; | |
4378 | const struct lttng_credentials *credential = lttng_trigger_get_credentials(trigger); | |
4379 | lttng_condition_event_rule_get_rule_no_const( | |
4380 | condition, &event_rule); | |
4381 | ret = lttng_event_rule_populate(event_rule, credential->uid, credential->gid); | |
4382 | if (ret != LTTNG_OK) { | |
4383 | goto end; | |
4384 | } | |
4385 | ||
4386 | switch (lttng_event_rule_get_type(event_rule)) { | |
4387 | case LTTNG_EVENT_RULE_TYPE_UPROBE: | |
4388 | { | |
4389 | int fd; | |
4390 | struct lttng_userspace_probe_location *location = lttng_event_rule_uprobe_get_location_no_const(event_rule); | |
4391 | ||
4392 | if (sock < 0) { | |
4393 | /* Nothing to receive */ | |
4394 | break; | |
4395 | } | |
4396 | /* | |
4397 | * Receive the file descriptor to the target binary from | |
4398 | * the client. | |
4399 | */ | |
4400 | DBG("Receiving userspace probe target FD from client ..."); | |
4401 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); | |
4402 | if (ret <= 0) { | |
4403 | DBG("Nothing recv() from client userspace probe fd... continuing"); | |
4404 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
4405 | goto end; | |
4406 | } | |
4407 | ||
4408 | /* | |
4409 | * Set the file descriptor received from the client | |
4410 | * through the unix socket in the probe location. | |
4411 | */ | |
4412 | ret = lttng_userspace_probe_location_set_binary_fd( | |
4413 | location, fd); | |
4414 | if (ret) { | |
4415 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
4416 | goto end; | |
4417 | } | |
4418 | ||
4419 | break; | |
4420 | } | |
4421 | default: | |
4422 | /* Nothing to do */ | |
4423 | break; | |
4424 | } | |
4425 | ||
4426 | /* Generate the capture bytecode set */ | |
4427 | ret = lttng_condition_event_rule_generate_capture_descriptor_bytecode_set( | |
4428 | condition, &trigger->capture_bytecode_set); | |
4429 | break; | |
4430 | } | |
4431 | default: | |
4432 | { | |
4433 | ret = LTTNG_OK; | |
4434 | break; | |
4435 | } | |
4436 | } | |
4437 | ||
4438 | ||
4439 | end: | |
4440 | return ret; | |
4441 | } | |
4442 | ||
4443 | /* Caller must call lttng_destroy_trigger on the returned trigger object */ | |
b0880ae5 | 4444 | int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock, |
5024c2ac JR |
4445 | struct notification_thread_handle *notification_thread, |
4446 | struct lttng_trigger **return_trigger) | |
b0880ae5 JG |
4447 | { |
4448 | int ret; | |
4449 | size_t trigger_len; | |
4450 | ssize_t sock_recv_len; | |
4451 | struct lttng_trigger *trigger = NULL; | |
4452 | struct lttng_buffer_view view; | |
4453 | struct lttng_dynamic_buffer trigger_buffer; | |
4454 | ||
4455 | lttng_dynamic_buffer_init(&trigger_buffer); | |
4456 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; | |
4457 | ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len); | |
4458 | if (ret) { | |
4459 | ret = LTTNG_ERR_NOMEM; | |
4460 | goto end; | |
4461 | } | |
4462 | ||
4463 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data, | |
4464 | trigger_len); | |
4465 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { | |
4466 | ERR("Failed to receive \"register trigger\" command payload"); | |
4467 | /* TODO: should this be a new error enum ? */ | |
4468 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4469 | goto end; | |
4470 | } | |
4471 | ||
4472 | view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1); | |
4473 | if (lttng_trigger_create_from_buffer(&view, &trigger) != | |
4474 | trigger_len) { | |
4475 | ERR("Invalid trigger payload received in \"register trigger\" command"); | |
4476 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4477 | goto end; | |
4478 | } | |
4479 | ||
5024c2ac JR |
4480 | /* |
4481 | * Since we return the trigger object, take a reference to it | |
4482 | * Caller is responsible for calling lttng_destroy_trigger on it. | |
4483 | * This thread does not OWN the trigger. | |
4484 | */ | |
4485 | lttng_trigger_get(trigger); | |
4486 | ||
4487 | /* Set the trigger credential */ | |
4488 | lttng_trigger_set_credentials(trigger, cmd_ctx->creds.uid, cmd_ctx->creds.gid); | |
4489 | ||
4490 | /* Prepare internal trigger object if needed on reception. | |
4491 | * Handles also special treatment for certain internal object of the | |
4492 | * trigger (e.g uprobe event rule binary fd. | |
4493 | */ | |
4494 | ret = prepare_trigger_object(trigger, sock); | |
4495 | if (ret != LTTNG_OK) { | |
4496 | goto end; | |
4497 | } | |
4498 | ||
4499 | /* Inform the notification thread */ | |
b0880ae5 JG |
4500 | ret = notification_thread_command_register_trigger(notification_thread, |
4501 | trigger); | |
5024c2ac JR |
4502 | if (ret != LTTNG_OK) { |
4503 | goto end; | |
4504 | } | |
4505 | ||
4506 | /* Synchronize tracers, only if needed */ | |
4507 | /* TODO: maybe extract somewhere else */ | |
4508 | { | |
4509 | struct lttng_condition *condition = NULL; | |
4510 | condition = lttng_trigger_get_condition(trigger); | |
4511 | if (!condition) { | |
4512 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4513 | goto end; | |
4514 | } | |
4515 | ||
4516 | if (lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_EVENT_RULE_HIT) { | |
4517 | const struct lttng_event_rule *rule = NULL; | |
4518 | (void) lttng_condition_event_rule_get_rule(condition, &rule); | |
4519 | if (!rule) { | |
4520 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4521 | goto end; | |
4522 | } | |
4523 | if (lttng_event_rule_get_domain_type(rule) == LTTNG_DOMAIN_KERNEL) { | |
4524 | /* TODO: get the token value from the | |
4525 | * notification thread and only perform an | |
4526 | * enable and a disable.... This is NOT | |
4527 | * OPTIMIZED AT ALL | |
4528 | */ | |
4529 | kernel_update_tokens(); | |
4530 | } else { | |
4531 | /* TODO: get the token value from the | |
4532 | * notification thread and only perform an | |
4533 | * enable and a disable.... This is NOT | |
4534 | * OPTIMIZED AT ALL | |
4535 | */ | |
4536 | ust_app_global_update_all_tokens(); | |
4537 | /* Agent handling */ | |
4538 | if (lttng_event_rule_is_agent(rule)) { | |
4539 | struct agent *agt; | |
4540 | const char *pattern; | |
4541 | enum lttng_domain_type domain_type; | |
4542 | domain_type = lttng_event_rule_get_domain_type( | |
4543 | rule); | |
4544 | (void) lttng_event_rule_tracepoint_get_pattern( | |
4545 | rule, &pattern); | |
4546 | agt = trigger_find_agent(domain_type); | |
4547 | if (!agt) { | |
4548 | agt = agent_create(domain_type); | |
4549 | if (!agt) { | |
4550 | ret = LTTNG_ERR_NOMEM; | |
4551 | goto end; | |
4552 | } | |
4553 | agent_add(agt, trigger_agents_ht_by_domain); | |
4554 | } | |
4555 | ||
4556 | ret = trigger_agent_enable( | |
4557 | trigger, agt); | |
4558 | if (ret != LTTNG_OK) { | |
4559 | goto end; | |
4560 | } | |
4561 | } | |
4562 | } | |
4563 | } | |
4564 | } | |
4565 | ||
4566 | /* Return an image of the updated object to the client */ | |
4567 | *return_trigger = trigger; | |
4568 | /* Ownership of trigger was transferred to caller. */ | |
587f9fd0 | 4569 | trigger = NULL; |
b0880ae5 | 4570 | end: |
587f9fd0 | 4571 | lttng_trigger_destroy(trigger); |
b0880ae5 JG |
4572 | lttng_dynamic_buffer_reset(&trigger_buffer); |
4573 | return ret; | |
4574 | } | |
4575 | ||
4576 | int cmd_unregister_trigger(struct command_ctx *cmd_ctx, int sock, | |
4577 | struct notification_thread_handle *notification_thread) | |
4578 | { | |
4579 | int ret; | |
4580 | size_t trigger_len; | |
4581 | ssize_t sock_recv_len; | |
4582 | struct lttng_trigger *trigger = NULL; | |
4583 | struct lttng_buffer_view view; | |
4584 | struct lttng_dynamic_buffer trigger_buffer; | |
4585 | ||
4586 | lttng_dynamic_buffer_init(&trigger_buffer); | |
4587 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; | |
4588 | ret = lttng_dynamic_buffer_set_size(&trigger_buffer, trigger_len); | |
4589 | if (ret) { | |
4590 | ret = LTTNG_ERR_NOMEM; | |
4591 | goto end; | |
4592 | } | |
4593 | ||
4594 | sock_recv_len = lttcomm_recv_unix_sock(sock, trigger_buffer.data, | |
4595 | trigger_len); | |
4596 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { | |
4597 | ERR("Failed to receive \"unregister trigger\" command payload"); | |
4598 | /* TODO: should this be a new error enum ? */ | |
4599 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4600 | goto end; | |
4601 | } | |
4602 | ||
4603 | view = lttng_buffer_view_from_dynamic_buffer(&trigger_buffer, 0, -1); | |
4604 | if (lttng_trigger_create_from_buffer(&view, &trigger) != | |
4605 | trigger_len) { | |
4606 | ERR("Invalid trigger payload received in \"unregister trigger\" command"); | |
4607 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4608 | goto end; | |
4609 | } | |
4610 | ||
5024c2ac JR |
4611 | lttng_trigger_set_credentials(trigger, cmd_ctx->creds.uid, cmd_ctx->creds.gid); |
4612 | ||
4613 | ret = prepare_trigger_object(trigger, -1); | |
4614 | if (ret != LTTNG_OK) { | |
4615 | goto end; | |
4616 | } | |
4617 | ||
b0880ae5 JG |
4618 | ret = notification_thread_command_unregister_trigger(notification_thread, |
4619 | trigger); | |
5024c2ac JR |
4620 | |
4621 | /* Synchronize tracers, only if needed */ | |
4622 | /* TODO: maybe extract somewhere else */ | |
4623 | { | |
4624 | struct lttng_condition *condition = NULL; | |
4625 | condition = lttng_trigger_get_condition(trigger); | |
4626 | if (!condition) { | |
4627 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4628 | goto end; | |
4629 | } | |
4630 | ||
4631 | if (lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_EVENT_RULE_HIT) { | |
4632 | const struct lttng_event_rule *rule = NULL; | |
4633 | (void) lttng_condition_event_rule_get_rule(condition, &rule); | |
4634 | if (!rule) { | |
4635 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4636 | goto end; | |
4637 | } | |
4638 | if (lttng_event_rule_get_domain_type(rule) == LTTNG_DOMAIN_KERNEL) { | |
4639 | /* TODO: get the token value from the | |
4640 | * notification thread and only perform an | |
4641 | * enable and a disable.... This is NOT | |
4642 | * OPTIMIZED AT ALL | |
4643 | */ | |
4644 | kernel_update_tokens(); | |
4645 | } else { | |
4646 | /* TODO: get the token value from the | |
4647 | * notification thread and only perform an | |
4648 | * enable and a disable.... This is NOT | |
4649 | * OPTIMIZED AT ALL | |
4650 | */ | |
4651 | ust_app_global_update_all_tokens(); | |
4652 | if (lttng_event_rule_is_agent(rule)) { | |
4653 | struct agent *agt; | |
4654 | const char *pattern; | |
4655 | enum lttng_domain_type domain_type; | |
4656 | ||
4657 | domain_type = lttng_event_rule_get_domain_type( | |
4658 | rule); | |
4659 | (void) lttng_event_rule_tracepoint_get_pattern( | |
4660 | rule, &pattern); | |
4661 | ||
4662 | agt = trigger_find_agent(domain_type); | |
4663 | if (!agt) { | |
4664 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
4665 | goto end; | |
4666 | } | |
4667 | ret = trigger_agent_disable( | |
4668 | trigger, agt); | |
4669 | if (ret != LTTNG_OK) { | |
4670 | goto end; | |
4671 | } | |
4672 | } | |
4673 | } | |
4674 | } | |
4675 | } | |
4676 | ||
b0880ae5 | 4677 | end: |
587f9fd0 | 4678 | lttng_trigger_destroy(trigger); |
b0880ae5 JG |
4679 | lttng_dynamic_buffer_reset(&trigger_buffer); |
4680 | return ret; | |
4681 | } | |
4682 | ||
5024c2ac JR |
4683 | int cmd_list_triggers(struct command_ctx *cmd_ctx, int sock, |
4684 | struct notification_thread_handle *notification_thread, | |
4685 | struct lttng_triggers **return_triggers) | |
4686 | { | |
4687 | int ret = 0; | |
4688 | enum lttng_error_code ret_code; | |
4689 | struct lttng_triggers *triggers = NULL; | |
4690 | ||
4691 | /* Get list of token trigger from the notification thread here */ | |
4692 | ret_code = notification_thread_command_list_triggers(notification_thread_handle, cmd_ctx->creds.uid, cmd_ctx->creds.gid, &triggers); | |
4693 | if (ret_code != LTTNG_OK) { | |
4694 | ret = ret_code; | |
4695 | goto end; | |
4696 | } | |
4697 | ||
4698 | /* Return a "view" of the current triggers */ | |
4699 | *return_triggers = triggers; | |
4700 | triggers = NULL; | |
4701 | ret = LTTNG_OK; | |
4702 | end: | |
4703 | lttng_triggers_destroy(triggers); | |
4704 | return ret; | |
4705 | } | |
6dc3064a DG |
4706 | /* |
4707 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
4708 | * snapshot output is *not* set with a remote destination. | |
4709 | * | |
9a654598 | 4710 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4711 | */ |
9a654598 | 4712 | static enum lttng_error_code set_relayd_for_snapshot( |
348a81dc | 4713 | struct consumer_output *output, |
fb9a95c4 | 4714 | const struct ltt_session *session) |
6dc3064a | 4715 | { |
9a654598 | 4716 | enum lttng_error_code status = LTTNG_OK; |
6dc3064a DG |
4717 | struct lttng_ht_iter iter; |
4718 | struct consumer_socket *socket; | |
1e791a74 | 4719 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
6fa5fe7c | 4720 | const char *base_path; |
6dc3064a | 4721 | |
348a81dc | 4722 | assert(output); |
6dc3064a DG |
4723 | assert(session); |
4724 | ||
4725 | DBG2("Set relayd object from snapshot output"); | |
4726 | ||
1e791a74 | 4727 | if (session->current_trace_chunk) { |
348a81dc JG |
4728 | enum lttng_trace_chunk_status chunk_status = |
4729 | lttng_trace_chunk_get_id( | |
4730 | session->current_trace_chunk, | |
4731 | ¤t_chunk_id.value); | |
1e791a74 | 4732 | |
348a81dc | 4733 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) { |
1e791a74 JG |
4734 | current_chunk_id.is_set = true; |
4735 | } else { | |
4736 | ERR("Failed to get current trace chunk id"); | |
4737 | status = LTTNG_ERR_UNK; | |
4738 | goto error; | |
4739 | } | |
4740 | } | |
4741 | ||
6dc3064a | 4742 | /* Ignore if snapshot consumer output is not network. */ |
348a81dc | 4743 | if (output->type != CONSUMER_DST_NET) { |
6dc3064a DG |
4744 | goto error; |
4745 | } | |
4746 | ||
6fa5fe7c MD |
4747 | /* |
4748 | * The snapshot record URI base path overrides the session | |
4749 | * base path. | |
4750 | */ | |
4751 | if (output->dst.net.control.subdir[0] != '\0') { | |
4752 | base_path = output->dst.net.control.subdir; | |
4753 | } else { | |
4754 | base_path = session->base_path; | |
4755 | } | |
4756 | ||
6dc3064a DG |
4757 | /* |
4758 | * For each consumer socket, create and send the relayd object of the | |
4759 | * snapshot output. | |
4760 | */ | |
4761 | rcu_read_lock(); | |
348a81dc | 4762 | cds_lfht_for_each_entry(output->socks->ht, &iter.iter, |
5eecee74 | 4763 | socket, node.node) { |
ecd0f96d | 4764 | pthread_mutex_lock(socket->lock); |
9a654598 | 4765 | status = send_consumer_relayd_sockets(0, session->id, |
348a81dc | 4766 | output, socket, |
d3e2ba59 | 4767 | session->name, session->hostname, |
6fa5fe7c | 4768 | base_path, |
1e791a74 | 4769 | session->live_timer, |
db1da059 | 4770 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
4771 | session->creation_time, |
4772 | session->name_contains_creation_time); | |
ecd0f96d | 4773 | pthread_mutex_unlock(socket->lock); |
9a654598 | 4774 | if (status != LTTNG_OK) { |
6dc3064a DG |
4775 | rcu_read_unlock(); |
4776 | goto error; | |
4777 | } | |
4778 | } | |
4779 | rcu_read_unlock(); | |
4780 | ||
4781 | error: | |
9a654598 | 4782 | return status; |
6dc3064a DG |
4783 | } |
4784 | ||
4785 | /* | |
4786 | * Record a kernel snapshot. | |
4787 | * | |
fac41e72 | 4788 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4789 | */ |
fb9a95c4 JG |
4790 | static enum lttng_error_code record_kernel_snapshot( |
4791 | struct ltt_kernel_session *ksess, | |
348a81dc | 4792 | const struct consumer_output *output, |
fb9a95c4 | 4793 | const struct ltt_session *session, |
d07ceecd | 4794 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a | 4795 | { |
9a654598 | 4796 | enum lttng_error_code status; |
6dc3064a DG |
4797 | |
4798 | assert(ksess); | |
4799 | assert(output); | |
4800 | assert(session); | |
4801 | ||
348a81dc JG |
4802 | status = kernel_snapshot_record( |
4803 | ksess, output, wait, nb_packets_per_stream); | |
9a654598 | 4804 | return status; |
6dc3064a DG |
4805 | } |
4806 | ||
4807 | /* | |
4808 | * Record a UST snapshot. | |
4809 | * | |
9a654598 | 4810 | * Returns LTTNG_OK on success or a LTTNG_ERR error code. |
6dc3064a | 4811 | */ |
9a654598 | 4812 | static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess, |
348a81dc JG |
4813 | const struct consumer_output *output, |
4814 | const struct ltt_session *session, | |
4815 | int wait, uint64_t nb_packets_per_stream) | |
6dc3064a | 4816 | { |
9a654598 | 4817 | enum lttng_error_code status; |
6dc3064a DG |
4818 | |
4819 | assert(usess); | |
4820 | assert(output); | |
4821 | assert(session); | |
4822 | ||
348a81dc JG |
4823 | status = ust_app_snapshot_record( |
4824 | usess, output, wait, nb_packets_per_stream); | |
9a654598 | 4825 | return status; |
6dc3064a DG |
4826 | } |
4827 | ||
d07ceecd | 4828 | static |
fb9a95c4 JG |
4829 | uint64_t get_session_size_one_more_packet_per_stream( |
4830 | const struct ltt_session *session, uint64_t cur_nr_packets) | |
68808f4e | 4831 | { |
d07ceecd | 4832 | uint64_t tot_size = 0; |
68808f4e DG |
4833 | |
4834 | if (session->kernel_session) { | |
4835 | struct ltt_kernel_channel *chan; | |
fb9a95c4 JG |
4836 | const struct ltt_kernel_session *ksess = |
4837 | session->kernel_session; | |
68808f4e | 4838 | |
68808f4e | 4839 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
4840 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
4841 | /* | |
4842 | * Don't take channel into account if we | |
4843 | * already grab all its packets. | |
4844 | */ | |
4845 | continue; | |
68808f4e | 4846 | } |
d07ceecd MD |
4847 | tot_size += chan->channel->attr.subbuf_size |
4848 | * chan->stream_count; | |
68808f4e DG |
4849 | } |
4850 | } | |
4851 | ||
4852 | if (session->ust_session) { | |
fb9a95c4 | 4853 | const struct ltt_ust_session *usess = session->ust_session; |
68808f4e | 4854 | |
d07ceecd MD |
4855 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
4856 | cur_nr_packets); | |
68808f4e DG |
4857 | } |
4858 | ||
d07ceecd | 4859 | return tot_size; |
68808f4e DG |
4860 | } |
4861 | ||
5c786ded | 4862 | /* |
d07ceecd MD |
4863 | * Calculate the number of packets we can grab from each stream that |
4864 | * fits within the overall snapshot max size. | |
4865 | * | |
4866 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
4867 | * the number of packets per stream. | |
4868 | * | |
4869 | * TODO: this approach is not perfect: we consider the worse case | |
4870 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
4871 | * better if we do this calculation while we actually grab the packet | |
4872 | * content: we would know how much padding we don't actually store into | |
4873 | * the file. | |
4874 | * | |
4875 | * This algorithm is currently bounded by the number of packets per | |
4876 | * stream. | |
4877 | * | |
4878 | * Since we call this algorithm before actually grabbing the data, it's | |
4879 | * an approximation: for instance, applications could appear/disappear | |
4880 | * in between this call and actually grabbing data. | |
5c786ded | 4881 | */ |
d07ceecd | 4882 | static |
fb9a95c4 JG |
4883 | int64_t get_session_nb_packets_per_stream(const struct ltt_session *session, |
4884 | uint64_t max_size) | |
5c786ded | 4885 | { |
d07ceecd MD |
4886 | int64_t size_left; |
4887 | uint64_t cur_nb_packets = 0; | |
5c786ded | 4888 | |
d07ceecd MD |
4889 | if (!max_size) { |
4890 | return 0; /* Infinite */ | |
5c786ded JD |
4891 | } |
4892 | ||
d07ceecd MD |
4893 | size_left = max_size; |
4894 | for (;;) { | |
4895 | uint64_t one_more_packet_tot_size; | |
5c786ded | 4896 | |
fb9a95c4 JG |
4897 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream( |
4898 | session, cur_nb_packets); | |
d07ceecd MD |
4899 | if (!one_more_packet_tot_size) { |
4900 | /* We are already grabbing all packets. */ | |
4901 | break; | |
4902 | } | |
4903 | size_left -= one_more_packet_tot_size; | |
4904 | if (size_left < 0) { | |
4905 | break; | |
4906 | } | |
4907 | cur_nb_packets++; | |
5c786ded | 4908 | } |
aecf2da5 | 4909 | if (!cur_nb_packets && size_left != max_size) { |
d07ceecd MD |
4910 | /* Not enough room to grab one packet of each stream, error. */ |
4911 | return -1; | |
4912 | } | |
4913 | return cur_nb_packets; | |
5c786ded JD |
4914 | } |
4915 | ||
fb9a95c4 | 4916 | static |
d2956687 | 4917 | enum lttng_error_code snapshot_record(struct ltt_session *session, |
fb9a95c4 JG |
4918 | const struct snapshot_output *snapshot_output, int wait) |
4919 | { | |
4920 | int64_t nb_packets_per_stream; | |
d2956687 | 4921 | char snapshot_chunk_name[LTTNG_NAME_MAX]; |
348a81dc JG |
4922 | int ret; |
4923 | enum lttng_error_code ret_code = LTTNG_OK; | |
d2956687 | 4924 | struct lttng_trace_chunk *snapshot_trace_chunk; |
348a81dc JG |
4925 | struct consumer_output *original_ust_consumer_output = NULL; |
4926 | struct consumer_output *original_kernel_consumer_output = NULL; | |
4927 | struct consumer_output *snapshot_ust_consumer_output = NULL; | |
4928 | struct consumer_output *snapshot_kernel_consumer_output = NULL; | |
d2956687 | 4929 | |
348a81dc | 4930 | ret = snprintf(snapshot_chunk_name, sizeof(snapshot_chunk_name), |
d2956687 JG |
4931 | "%s-%s-%" PRIu64, |
4932 | snapshot_output->name, | |
4933 | snapshot_output->datetime, | |
4934 | snapshot_output->nb_snapshot); | |
348a81dc | 4935 | if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) { |
d2956687 | 4936 | ERR("Failed to format snapshot name"); |
348a81dc JG |
4937 | ret_code = LTTNG_ERR_INVALID; |
4938 | goto error; | |
d2956687 JG |
4939 | } |
4940 | DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"", | |
4941 | snapshot_output->name, session->name, | |
4942 | snapshot_chunk_name); | |
348a81dc JG |
4943 | if (!session->kernel_session && !session->ust_session) { |
4944 | ERR("Failed to record snapshot as no channels exist"); | |
4945 | ret_code = LTTNG_ERR_NO_CHANNEL; | |
4946 | goto error; | |
4947 | } | |
4948 | ||
4949 | if (session->kernel_session) { | |
4950 | original_kernel_consumer_output = | |
4951 | session->kernel_session->consumer; | |
4952 | snapshot_kernel_consumer_output = | |
4953 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4954 | strcpy(snapshot_kernel_consumer_output->chunk_path, |
4955 | snapshot_chunk_name); | |
348a81dc JG |
4956 | ret = consumer_copy_sockets(snapshot_kernel_consumer_output, |
4957 | original_kernel_consumer_output); | |
4958 | if (ret < 0) { | |
4959 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4960 | ret_code = LTTNG_ERR_NOMEM; | |
4961 | goto error; | |
4962 | } | |
4963 | ret_code = set_relayd_for_snapshot( | |
4964 | snapshot_kernel_consumer_output, session); | |
4965 | if (ret_code != LTTNG_OK) { | |
4966 | ERR("Failed to setup relay daemon for kernel tracer snapshot"); | |
4967 | goto error; | |
4968 | } | |
4969 | session->kernel_session->consumer = | |
4970 | snapshot_kernel_consumer_output; | |
4971 | } | |
4972 | if (session->ust_session) { | |
4973 | original_ust_consumer_output = session->ust_session->consumer; | |
4974 | snapshot_ust_consumer_output = | |
4975 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4976 | strcpy(snapshot_ust_consumer_output->chunk_path, |
4977 | snapshot_chunk_name); | |
348a81dc JG |
4978 | ret = consumer_copy_sockets(snapshot_ust_consumer_output, |
4979 | original_ust_consumer_output); | |
4980 | if (ret < 0) { | |
4981 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4982 | ret_code = LTTNG_ERR_NOMEM; | |
4983 | goto error; | |
4984 | } | |
4985 | ret_code = set_relayd_for_snapshot( | |
4986 | snapshot_ust_consumer_output, session); | |
4987 | if (ret_code != LTTNG_OK) { | |
4988 | ERR("Failed to setup relay daemon for userspace tracer snapshot"); | |
4989 | goto error; | |
4990 | } | |
4991 | session->ust_session->consumer = | |
4992 | snapshot_ust_consumer_output; | |
4993 | } | |
4994 | ||
d2956687 | 4995 | snapshot_trace_chunk = session_create_new_trace_chunk(session, |
348a81dc JG |
4996 | snapshot_kernel_consumer_output ?: |
4997 | snapshot_ust_consumer_output, | |
4998 | consumer_output_get_base_path( | |
4999 | snapshot_output->consumer), | |
d2956687 JG |
5000 | snapshot_chunk_name); |
5001 | if (!snapshot_trace_chunk) { | |
348a81dc JG |
5002 | ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"", |
5003 | session->name); | |
5004 | ret_code = LTTNG_ERR_CREATE_DIR_FAIL; | |
5005 | goto error; | |
d2956687 JG |
5006 | } |
5007 | assert(!session->current_trace_chunk); | |
5008 | ret = session_set_trace_chunk(session, snapshot_trace_chunk, NULL); | |
5009 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
5010 | snapshot_trace_chunk = NULL; | |
5011 | if (ret) { | |
348a81dc JG |
5012 | ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"", |
5013 | session->name); | |
5014 | ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
5015 | goto error; | |
d2956687 | 5016 | } |
fb9a95c4 JG |
5017 | |
5018 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
5019 | snapshot_output->max_size); | |
5020 | if (nb_packets_per_stream < 0) { | |
348a81dc | 5021 | ret_code = LTTNG_ERR_MAX_SIZE_INVALID; |
5151d412 | 5022 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5023 | } |
5024 | ||
5025 | if (session->kernel_session) { | |
348a81dc JG |
5026 | ret_code = record_kernel_snapshot(session->kernel_session, |
5027 | snapshot_kernel_consumer_output, session, | |
fb9a95c4 | 5028 | wait, nb_packets_per_stream); |
348a81dc | 5029 | if (ret_code != LTTNG_OK) { |
5151d412 | 5030 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5031 | } |
5032 | } | |
5033 | ||
5034 | if (session->ust_session) { | |
348a81dc JG |
5035 | ret_code = record_ust_snapshot(session->ust_session, |
5036 | snapshot_ust_consumer_output, session, | |
fb9a95c4 | 5037 | wait, nb_packets_per_stream); |
348a81dc | 5038 | if (ret_code != LTTNG_OK) { |
5151d412 | 5039 | goto error_close_trace_chunk; |
fb9a95c4 JG |
5040 | } |
5041 | } | |
d2956687 | 5042 | |
5151d412 | 5043 | error_close_trace_chunk: |
dbfee52c MD |
5044 | if (session_set_trace_chunk(session, NULL, &snapshot_trace_chunk)) { |
5045 | ERR("Failed to release the current trace chunk of session \"%s\"", | |
5046 | session->name); | |
5047 | ret_code = LTTNG_ERR_UNK; | |
5048 | } | |
5049 | ||
5050 | if (session_close_trace_chunk(session, snapshot_trace_chunk, | |
343defc2 | 5051 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) { |
d2956687 JG |
5052 | /* |
5053 | * Don't goto end; make sure the chunk is closed for the session | |
5054 | * to allow future snapshots. | |
5055 | */ | |
5056 | ERR("Failed to close snapshot trace chunk of session \"%s\"", | |
5057 | session->name); | |
348a81dc | 5058 | ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; |
d2956687 | 5059 | } |
348a81dc JG |
5060 | error: |
5061 | if (original_ust_consumer_output) { | |
5062 | session->ust_session->consumer = original_ust_consumer_output; | |
5063 | } | |
5064 | if (original_kernel_consumer_output) { | |
5065 | session->kernel_session->consumer = | |
5066 | original_kernel_consumer_output; | |
5067 | } | |
5068 | consumer_output_put(snapshot_ust_consumer_output); | |
5069 | consumer_output_put(snapshot_kernel_consumer_output); | |
5070 | return ret_code; | |
fb9a95c4 JG |
5071 | } |
5072 | ||
6dc3064a DG |
5073 | /* |
5074 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
5075 | * | |
5076 | * The wait parameter is ignored so this call always wait for the snapshot to | |
5077 | * complete before returning. | |
5078 | * | |
5079 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
5080 | */ | |
5081 | int cmd_snapshot_record(struct ltt_session *session, | |
df4f5a87 | 5082 | const struct lttng_snapshot_output *output, int wait) |
6dc3064a | 5083 | { |
9a654598 JG |
5084 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5085 | int ret; | |
00e1dfc4 | 5086 | unsigned int snapshot_success = 0; |
10ba83fe | 5087 | char datetime[16]; |
2abe7969 | 5088 | struct snapshot_output *tmp_output = NULL; |
6dc3064a DG |
5089 | |
5090 | assert(session); | |
ba45d9f0 | 5091 | assert(output); |
6dc3064a DG |
5092 | |
5093 | DBG("Cmd snapshot record for session %s", session->name); | |
5094 | ||
10ba83fe JR |
5095 | /* Get the datetime for the snapshot output directory. */ |
5096 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
5097 | sizeof(datetime)); | |
5098 | if (!ret) { | |
9a654598 | 5099 | cmd_ret = LTTNG_ERR_INVALID; |
10ba83fe JR |
5100 | goto error; |
5101 | } | |
5102 | ||
6dc3064a | 5103 | /* |
d3f14b8a MD |
5104 | * Permission denied to create an output if the session is not |
5105 | * set in no output mode. | |
6dc3064a DG |
5106 | */ |
5107 | if (session->output_traces) { | |
9a654598 | 5108 | cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
5109 | goto error; |
5110 | } | |
5111 | ||
5112 | /* The session needs to be started at least once. */ | |
8382cf6f | 5113 | if (!session->has_been_started) { |
9a654598 | 5114 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
6dc3064a DG |
5115 | goto error; |
5116 | } | |
5117 | ||
5118 | /* Use temporary output for the session. */ | |
ba45d9f0 | 5119 | if (*output->ctrl_url != '\0') { |
2abe7969 JG |
5120 | tmp_output = snapshot_output_alloc(); |
5121 | if (!tmp_output) { | |
5122 | cmd_ret = LTTNG_ERR_NOMEM; | |
5123 | goto error; | |
5124 | } | |
5125 | ||
b178f53e JG |
5126 | ret = snapshot_output_init(session, output->max_size, |
5127 | output->name, | |
5128 | output->ctrl_url, output->data_url, | |
5129 | session->consumer, | |
2abe7969 | 5130 | tmp_output, NULL); |
6dc3064a DG |
5131 | if (ret < 0) { |
5132 | if (ret == -ENOMEM) { | |
9a654598 | 5133 | cmd_ret = LTTNG_ERR_NOMEM; |
6dc3064a | 5134 | } else { |
9a654598 | 5135 | cmd_ret = LTTNG_ERR_INVALID; |
6dc3064a DG |
5136 | } |
5137 | goto error; | |
5138 | } | |
1bfe7328 | 5139 | /* Use the global session count for the temporary snapshot. */ |
2abe7969 | 5140 | tmp_output->nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe JR |
5141 | |
5142 | /* Use the global datetime */ | |
2abe7969 JG |
5143 | memcpy(tmp_output->datetime, datetime, sizeof(datetime)); |
5144 | cmd_ret = snapshot_record(session, tmp_output, wait); | |
fb9a95c4 | 5145 | if (cmd_ret != LTTNG_OK) { |
804c90a8 JR |
5146 | goto error; |
5147 | } | |
804c90a8 JR |
5148 | snapshot_success = 1; |
5149 | } else { | |
5150 | struct snapshot_output *sout; | |
5151 | struct lttng_ht_iter iter; | |
68808f4e | 5152 | |
804c90a8 JR |
5153 | rcu_read_lock(); |
5154 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
5155 | &iter.iter, sout, node.node) { | |
2abe7969 JG |
5156 | struct snapshot_output output_copy; |
5157 | ||
804c90a8 | 5158 | /* |
2abe7969 JG |
5159 | * Make a local copy of the output and override output |
5160 | * parameters with those provided as part of the | |
5161 | * command. | |
804c90a8 | 5162 | */ |
2abe7969 | 5163 | memcpy(&output_copy, sout, sizeof(output_copy)); |
1bfe7328 | 5164 | |
804c90a8 | 5165 | if (output->max_size != (uint64_t) -1ULL) { |
2abe7969 | 5166 | output_copy.max_size = output->max_size; |
6dc3064a | 5167 | } |
d07ceecd | 5168 | |
2abe7969 JG |
5169 | output_copy.nb_snapshot = session->snapshot.nb_snapshot; |
5170 | memcpy(output_copy.datetime, datetime, | |
5171 | sizeof(datetime)); | |
6dc3064a | 5172 | |
804c90a8 JR |
5173 | /* Use temporary name. */ |
5174 | if (*output->name != '\0') { | |
2abe7969 JG |
5175 | if (lttng_strncpy(output_copy.name, |
5176 | output->name, | |
5177 | sizeof(output_copy.name))) { | |
9a654598 | 5178 | cmd_ret = LTTNG_ERR_INVALID; |
cf3e357d MD |
5179 | rcu_read_unlock(); |
5180 | goto error; | |
5181 | } | |
804c90a8 | 5182 | } |
e1986656 | 5183 | |
2abe7969 | 5184 | cmd_ret = snapshot_record(session, &output_copy, wait); |
fb9a95c4 JG |
5185 | if (cmd_ret != LTTNG_OK) { |
5186 | rcu_read_unlock(); | |
5187 | goto error; | |
6dc3064a | 5188 | } |
804c90a8 | 5189 | snapshot_success = 1; |
6dc3064a | 5190 | } |
804c90a8 | 5191 | rcu_read_unlock(); |
6dc3064a DG |
5192 | } |
5193 | ||
1bfe7328 DG |
5194 | if (snapshot_success) { |
5195 | session->snapshot.nb_snapshot++; | |
b67578cb | 5196 | } else { |
9a654598 | 5197 | cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL; |
1bfe7328 DG |
5198 | } |
5199 | ||
6dc3064a | 5200 | error: |
2abe7969 JG |
5201 | if (tmp_output) { |
5202 | snapshot_output_destroy(tmp_output); | |
5203 | } | |
9a654598 | 5204 | return cmd_ret; |
6dc3064a DG |
5205 | } |
5206 | ||
d7ba1388 MD |
5207 | /* |
5208 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
5209 | */ | |
5210 | int cmd_set_session_shm_path(struct ltt_session *session, | |
5211 | const char *shm_path) | |
5212 | { | |
5213 | /* Safety net */ | |
5214 | assert(session); | |
5215 | ||
5216 | /* | |
5217 | * Can only set shm path before session is started. | |
5218 | */ | |
5219 | if (session->has_been_started) { | |
5220 | return LTTNG_ERR_SESSION_STARTED; | |
5221 | } | |
5222 | ||
5223 | strncpy(session->shm_path, shm_path, | |
5224 | sizeof(session->shm_path)); | |
5225 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
5226 | ||
5227 | return 0; | |
5228 | } | |
5229 | ||
5c408ad8 JD |
5230 | /* |
5231 | * Command LTTNG_ROTATE_SESSION from the lttng-ctl library. | |
5232 | * | |
5233 | * Ask the consumer to rotate the session output directory. | |
5234 | * The session lock must be held. | |
5235 | * | |
d5a1b7aa | 5236 | * Returns LTTNG_OK on success or else a negative LTTng error code. |
5c408ad8 JD |
5237 | */ |
5238 | int cmd_rotate_session(struct ltt_session *session, | |
7fdbed1c | 5239 | struct lttng_rotate_session_return *rotate_return, |
343defc2 MD |
5240 | bool quiet_rotation, |
5241 | enum lttng_trace_chunk_command_type command) | |
5c408ad8 JD |
5242 | { |
5243 | int ret; | |
d2956687 | 5244 | uint64_t ongoing_rotation_chunk_id; |
d5a1b7aa | 5245 | enum lttng_error_code cmd_ret = LTTNG_OK; |
d2956687 JG |
5246 | struct lttng_trace_chunk *chunk_being_archived = NULL; |
5247 | struct lttng_trace_chunk *new_trace_chunk = NULL; | |
5248 | enum lttng_trace_chunk_status chunk_status; | |
3156892b JG |
5249 | bool failed_to_rotate = false; |
5250 | enum lttng_error_code rotation_fail_code = LTTNG_OK; | |
5c408ad8 JD |
5251 | |
5252 | assert(session); | |
5253 | ||
5254 | if (!session->has_been_started) { | |
d5a1b7aa | 5255 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
d68c9a04 | 5256 | goto end; |
5c408ad8 JD |
5257 | } |
5258 | ||
d48d65e1 MD |
5259 | /* |
5260 | * Explicit rotation is not supported for live sessions. | |
5261 | * However, live sessions can perform a quiet rotation on | |
5262 | * destroy. | |
5263 | * Rotation is not supported for snapshot traces (no output). | |
5264 | */ | |
5265 | if ((!quiet_rotation && session->live_timer) || | |
5266 | !session->output_traces) { | |
d5a1b7aa | 5267 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
d68c9a04 | 5268 | goto end; |
5c408ad8 JD |
5269 | } |
5270 | ||
d2956687 | 5271 | /* Unsupported feature in lttng-relayd before 2.11. */ |
070b6a86 | 5272 | if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET && |
5c408ad8 JD |
5273 | (session->consumer->relay_major_version == 2 && |
5274 | session->consumer->relay_minor_version < 11)) { | |
d5a1b7aa | 5275 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY; |
d68c9a04 | 5276 | goto end; |
5c408ad8 JD |
5277 | } |
5278 | ||
a40a503f MD |
5279 | /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */ |
5280 | if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) { | |
5281 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL; | |
5282 | goto end; | |
5283 | } | |
5284 | ||
92816cc3 | 5285 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
92816cc3 JG |
5286 | DBG("Refusing to launch a rotation; a rotation is already in progress for session %s", |
5287 | session->name); | |
d5a1b7aa | 5288 | cmd_ret = LTTNG_ERR_ROTATION_PENDING; |
d68c9a04 | 5289 | goto end; |
5c408ad8 JD |
5290 | } |
5291 | ||
5292 | /* | |
5293 | * After a stop, we only allow one rotation to occur, the other ones are | |
5294 | * useless until a new start. | |
5295 | */ | |
5296 | if (session->rotated_after_last_stop) { | |
5297 | DBG("Session \"%s\" was already rotated after stop, refusing rotation", | |
5298 | session->name); | |
d5a1b7aa | 5299 | cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; |
d68c9a04 | 5300 | goto end; |
5c408ad8 | 5301 | } |
b02f5986 MD |
5302 | |
5303 | /* | |
5304 | * After a stop followed by a clear, disallow following rotations a they would | |
5305 | * generate empty chunks. | |
5306 | */ | |
5307 | if (session->cleared_after_last_stop) { | |
5308 | DBG("Session \"%s\" was already cleared after stop, refusing rotation", | |
5309 | session->name); | |
5310 | cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR; | |
5311 | goto end; | |
5312 | } | |
5313 | ||
d2956687 | 5314 | if (session->active) { |
348a81dc | 5315 | new_trace_chunk = session_create_new_trace_chunk(session, NULL, |
d2956687 JG |
5316 | NULL, NULL); |
5317 | if (!new_trace_chunk) { | |
5318 | cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
5319 | goto error; | |
5c408ad8 | 5320 | } |
d2956687 | 5321 | } |
2961f09e | 5322 | |
3156892b JG |
5323 | /* |
5324 | * The current trace chunk becomes the chunk being archived. | |
5325 | * | |
5326 | * After this point, "chunk_being_archived" must absolutely | |
5327 | * be closed on the consumer(s), otherwise it will never be | |
5328 | * cleaned-up, which will result in a leak. | |
5329 | */ | |
d2956687 JG |
5330 | ret = session_set_trace_chunk(session, new_trace_chunk, |
5331 | &chunk_being_archived); | |
5332 | if (ret) { | |
5333 | cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
b178f53e JG |
5334 | goto error; |
5335 | } | |
5336 | ||
5c408ad8 | 5337 | if (session->kernel_session) { |
d5a1b7aa JG |
5338 | cmd_ret = kernel_rotate_session(session); |
5339 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5340 | failed_to_rotate = true; |
5341 | rotation_fail_code = cmd_ret; | |
5c408ad8 JD |
5342 | } |
5343 | } | |
5344 | if (session->ust_session) { | |
d5a1b7aa JG |
5345 | cmd_ret = ust_app_rotate_session(session); |
5346 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5347 | failed_to_rotate = true; |
5348 | rotation_fail_code = cmd_ret; | |
5c408ad8 | 5349 | } |
92816cc3 | 5350 | } |
17dd1232 | 5351 | |
3b61d9ee JG |
5352 | if (!session->active) { |
5353 | session->rotated_after_last_stop = true; | |
5354 | } | |
5355 | ||
5356 | if (!chunk_being_archived) { | |
5357 | DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check", | |
5358 | session->name); | |
5359 | if (failed_to_rotate) { | |
5360 | cmd_ret = rotation_fail_code; | |
5361 | goto error; | |
5362 | } | |
5363 | cmd_ret = LTTNG_OK; | |
5364 | goto end; | |
5365 | } | |
5366 | ||
5367 | session->rotation_state = LTTNG_ROTATION_STATE_ONGOING; | |
5368 | chunk_status = lttng_trace_chunk_get_id(chunk_being_archived, | |
5369 | &ongoing_rotation_chunk_id); | |
5370 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5371 | ||
bbc4768c | 5372 | ret = session_close_trace_chunk(session, chunk_being_archived, |
343defc2 | 5373 | command, session->last_chunk_path); |
d2956687 JG |
5374 | if (ret) { |
5375 | cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; | |
5376 | goto error; | |
5377 | } | |
5378 | ||
3156892b JG |
5379 | if (failed_to_rotate) { |
5380 | cmd_ret = rotation_fail_code; | |
5381 | goto error; | |
5382 | } | |
5383 | ||
7fdbed1c | 5384 | session->quiet_rotation = quiet_rotation; |
92816cc3 JG |
5385 | ret = timer_session_rotation_pending_check_start(session, |
5386 | DEFAULT_ROTATE_PENDING_TIMER); | |
5387 | if (ret) { | |
d5a1b7aa | 5388 | cmd_ret = LTTNG_ERR_UNK; |
2961f09e | 5389 | goto error; |
5c408ad8 JD |
5390 | } |
5391 | ||
5c408ad8 | 5392 | if (rotate_return) { |
d2956687 | 5393 | rotate_return->rotation_id = ongoing_rotation_chunk_id; |
5c408ad8 JD |
5394 | } |
5395 | ||
d2956687 JG |
5396 | session->chunk_being_archived = chunk_being_archived; |
5397 | chunk_being_archived = NULL; | |
7fdbed1c JG |
5398 | if (!quiet_rotation) { |
5399 | ret = notification_thread_command_session_rotation_ongoing( | |
5400 | notification_thread_handle, | |
5401 | session->name, session->uid, session->gid, | |
5402 | ongoing_rotation_chunk_id); | |
5403 | if (ret != LTTNG_OK) { | |
5404 | ERR("Failed to notify notification thread that a session rotation is ongoing for session %s", | |
5405 | session->name); | |
5406 | cmd_ret = ret; | |
5407 | } | |
2961f09e JG |
5408 | } |
5409 | ||
92816cc3 | 5410 | DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent", |
d2956687 | 5411 | session->name, ongoing_rotation_chunk_id); |
5c408ad8 | 5412 | end: |
d2956687 JG |
5413 | lttng_trace_chunk_put(new_trace_chunk); |
5414 | lttng_trace_chunk_put(chunk_being_archived); | |
d5a1b7aa | 5415 | ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret); |
5c408ad8 | 5416 | return ret; |
2961f09e | 5417 | error: |
2961f09e | 5418 | if (session_reset_rotation_state(session, |
d2956687 | 5419 | LTTNG_ROTATION_STATE_ERROR)) { |
2961f09e JG |
5420 | ERR("Failed to reset rotation state of session \"%s\"", |
5421 | session->name); | |
5422 | } | |
5423 | goto end; | |
5c408ad8 JD |
5424 | } |
5425 | ||
5426 | /* | |
d68c9a04 | 5427 | * Command LTTNG_ROTATION_GET_INFO from the lttng-ctl library. |
5c408ad8 JD |
5428 | * |
5429 | * Check if the session has finished its rotation. | |
5430 | * | |
d2956687 | 5431 | * Return LTTNG_OK on success or else an LTTNG_ERR code. |
5c408ad8 | 5432 | */ |
d68c9a04 JD |
5433 | int cmd_rotate_get_info(struct ltt_session *session, |
5434 | struct lttng_rotation_get_info_return *info_return, | |
5435 | uint64_t rotation_id) | |
5c408ad8 | 5436 | { |
d2956687 JG |
5437 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5438 | enum lttng_rotation_state rotation_state; | |
5c408ad8 | 5439 | |
d68c9a04 | 5440 | DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, session->name, |
d2956687 | 5441 | session->most_recent_chunk_id.value); |
5c408ad8 | 5442 | |
d2956687 JG |
5443 | if (session->chunk_being_archived) { |
5444 | enum lttng_trace_chunk_status chunk_status; | |
5445 | uint64_t chunk_id; | |
5446 | ||
5447 | chunk_status = lttng_trace_chunk_get_id( | |
5448 | session->chunk_being_archived, | |
5449 | &chunk_id); | |
5450 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5451 | ||
5452 | rotation_state = rotation_id == chunk_id ? | |
5453 | LTTNG_ROTATION_STATE_ONGOING : | |
5454 | LTTNG_ROTATION_STATE_EXPIRED; | |
5455 | } else { | |
5456 | if (session->last_archived_chunk_id.is_set && | |
5457 | rotation_id != session->last_archived_chunk_id.value) { | |
5458 | rotation_state = LTTNG_ROTATION_STATE_EXPIRED; | |
5459 | } else { | |
5460 | rotation_state = session->rotation_state; | |
5461 | } | |
5c408ad8 JD |
5462 | } |
5463 | ||
d2956687 JG |
5464 | switch (rotation_state) { |
5465 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
83ed9e90 | 5466 | DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"", |
d2956687 JG |
5467 | session->name); |
5468 | goto end; | |
5469 | case LTTNG_ROTATION_STATE_EXPIRED: | |
5470 | DBG("Reporting that the rotation state of rotation id %" PRIu64 " of session \"%s\" has expired", | |
5471 | rotation_id, session->name); | |
5472 | break; | |
d68c9a04 | 5473 | case LTTNG_ROTATION_STATE_ONGOING: |
d2956687 | 5474 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending", |
d68c9a04 JD |
5475 | rotation_id, session->name); |
5476 | break; | |
5477 | case LTTNG_ROTATION_STATE_COMPLETED: | |
dd73d57b | 5478 | { |
d2956687 JG |
5479 | int fmt_ret; |
5480 | char *chunk_path; | |
dd73d57b JG |
5481 | char *current_tracing_path_reply; |
5482 | size_t current_tracing_path_reply_len; | |
5483 | ||
d2956687 JG |
5484 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed", |
5485 | rotation_id, session->name); | |
5486 | ||
dd73d57b JG |
5487 | switch (session_get_consumer_destination_type(session)) { |
5488 | case CONSUMER_DST_LOCAL: | |
5489 | current_tracing_path_reply = | |
5490 | info_return->location.local.absolute_path; | |
5491 | current_tracing_path_reply_len = | |
5492 | sizeof(info_return->location.local.absolute_path); | |
5493 | info_return->location_type = | |
05f8afa9 | 5494 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL; |
ecd1a12f MD |
5495 | fmt_ret = asprintf(&chunk_path, |
5496 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", | |
5497 | session_get_base_path(session), | |
5498 | session->last_archived_chunk_name); | |
5499 | if (fmt_ret == -1) { | |
5500 | PERROR("Failed to format the path of the last archived trace chunk"); | |
5501 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5502 | cmd_ret = LTTNG_ERR_UNK; | |
5503 | goto end; | |
5504 | } | |
dd73d57b JG |
5505 | break; |
5506 | case CONSUMER_DST_NET: | |
09cfbe47 JG |
5507 | { |
5508 | uint16_t ctrl_port, data_port; | |
5509 | ||
dd73d57b JG |
5510 | current_tracing_path_reply = |
5511 | info_return->location.relay.relative_path; | |
5512 | current_tracing_path_reply_len = | |
5513 | sizeof(info_return->location.relay.relative_path); | |
5514 | /* Currently the only supported relay protocol. */ | |
5515 | info_return->location.relay.protocol = | |
05f8afa9 | 5516 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP; |
dd73d57b | 5517 | |
d2956687 | 5518 | fmt_ret = lttng_strncpy(info_return->location.relay.host, |
dd73d57b JG |
5519 | session_get_net_consumer_hostname(session), |
5520 | sizeof(info_return->location.relay.host)); | |
d2956687 JG |
5521 | if (fmt_ret) { |
5522 | ERR("Failed to copy host name to rotate_get_info reply"); | |
dd73d57b | 5523 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5524 | cmd_ret = LTTNG_ERR_SET_URL; |
dd73d57b JG |
5525 | goto end; |
5526 | } | |
5527 | ||
09cfbe47 JG |
5528 | session_get_net_consumer_ports(session, &ctrl_port, &data_port); |
5529 | info_return->location.relay.ports.control = ctrl_port; | |
5530 | info_return->location.relay.ports.data = data_port; | |
dd73d57b | 5531 | info_return->location_type = |
05f8afa9 | 5532 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY; |
ecd1a12f MD |
5533 | chunk_path = strdup(session->last_chunk_path); |
5534 | if (!chunk_path) { | |
5535 | ERR("Failed to allocate the path of the last archived trace chunk"); | |
5536 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5537 | cmd_ret = LTTNG_ERR_UNK; | |
5538 | goto end; | |
5539 | } | |
dd73d57b | 5540 | break; |
09cfbe47 | 5541 | } |
dd73d57b JG |
5542 | default: |
5543 | abort(); | |
5544 | } | |
d2956687 JG |
5545 | |
5546 | fmt_ret = lttng_strncpy(current_tracing_path_reply, | |
5547 | chunk_path, current_tracing_path_reply_len); | |
5548 | free(chunk_path); | |
5549 | if (fmt_ret) { | |
5550 | ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply"); | |
d68c9a04 | 5551 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5552 | cmd_ret = LTTNG_ERR_UNK; |
5c408ad8 JD |
5553 | goto end; |
5554 | } | |
dd73d57b | 5555 | |
d68c9a04 | 5556 | break; |
dd73d57b | 5557 | } |
d68c9a04 | 5558 | case LTTNG_ROTATION_STATE_ERROR: |
d2956687 | 5559 | DBG("Reporting that an error occurred during rotation %" PRIu64 " of session \"%s\"", |
d68c9a04 JD |
5560 | rotation_id, session->name); |
5561 | break; | |
5562 | default: | |
5563 | abort(); | |
5c408ad8 JD |
5564 | } |
5565 | ||
d2956687 | 5566 | cmd_ret = LTTNG_OK; |
5c408ad8 | 5567 | end: |
d2956687 JG |
5568 | info_return->status = (int32_t) rotation_state; |
5569 | return cmd_ret; | |
5c408ad8 JD |
5570 | } |
5571 | ||
259c2674 JD |
5572 | /* |
5573 | * Command LTTNG_ROTATION_SET_SCHEDULE from the lttng-ctl library. | |
5574 | * | |
5575 | * Configure the automatic rotation parameters. | |
66ea93b1 JG |
5576 | * 'activate' to true means activate the rotation schedule type with 'new_value'. |
5577 | * 'activate' to false means deactivate the rotation schedule and validate that | |
5578 | * 'new_value' has the same value as the currently active value. | |
259c2674 | 5579 | * |
66ea93b1 | 5580 | * Return 0 on success or else a positive LTTNG_ERR code. |
259c2674 JD |
5581 | */ |
5582 | int cmd_rotation_set_schedule(struct ltt_session *session, | |
66ea93b1 JG |
5583 | bool activate, enum lttng_rotation_schedule_type schedule_type, |
5584 | uint64_t new_value, | |
90936dcf | 5585 | struct notification_thread_handle *notification_thread_handle) |
259c2674 JD |
5586 | { |
5587 | int ret; | |
66ea93b1 | 5588 | uint64_t *parameter_value; |
259c2674 JD |
5589 | |
5590 | assert(session); | |
5591 | ||
5592 | DBG("Cmd rotate set schedule session %s", session->name); | |
5593 | ||
92fe5ca1 | 5594 | if (session->live_timer || !session->output_traces) { |
66ea93b1 | 5595 | DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session"); |
259c2674 JD |
5596 | ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
5597 | goto end; | |
5598 | } | |
5599 | ||
66ea93b1 JG |
5600 | switch (schedule_type) { |
5601 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5602 | parameter_value = &session->rotate_size; | |
5603 | break; | |
5604 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5605 | parameter_value = &session->rotate_timer_period; | |
5606 | if (new_value >= UINT_MAX) { | |
5607 | DBG("Failing ROTATION_SET_SCHEDULE command as the value requested for a periodic rotation schedule is invalid: %" PRIu64 " > %u (UINT_MAX)", | |
5608 | new_value, UINT_MAX); | |
5609 | ret = LTTNG_ERR_INVALID; | |
5610 | goto end; | |
5611 | } | |
5612 | break; | |
5613 | default: | |
5614 | WARN("Failing ROTATION_SET_SCHEDULE command on unknown schedule type"); | |
5615 | ret = LTTNG_ERR_INVALID; | |
259c2674 | 5616 | goto end; |
66ea93b1 JG |
5617 | } |
5618 | ||
5619 | /* Improper use of the API. */ | |
5620 | if (new_value == -1ULL) { | |
5621 | WARN("Failing ROTATION_SET_SCHEDULE command as the value requested is -1"); | |
5622 | ret = LTTNG_ERR_INVALID; | |
259c2674 JD |
5623 | goto end; |
5624 | } | |
5625 | ||
66ea93b1 JG |
5626 | /* |
5627 | * As indicated in struct ltt_session's comments, a value of == 0 means | |
5628 | * this schedule rotation type is not in use. | |
5629 | * | |
5630 | * Reject the command if we were asked to activate a schedule that was | |
5631 | * already active. | |
5632 | */ | |
5633 | if (activate && *parameter_value != 0) { | |
5634 | DBG("Failing ROTATION_SET_SCHEDULE (activate) command as the schedule is already active"); | |
5635 | ret = LTTNG_ERR_ROTATION_SCHEDULE_SET; | |
90936dcf | 5636 | goto end; |
66ea93b1 JG |
5637 | } |
5638 | ||
5639 | /* | |
5640 | * Reject the command if we were asked to deactivate a schedule that was | |
5641 | * not active. | |
5642 | */ | |
5643 | if (!activate && *parameter_value == 0) { | |
5644 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as the schedule is already inactive"); | |
5645 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
90936dcf JD |
5646 | goto end; |
5647 | } | |
5648 | ||
66ea93b1 JG |
5649 | /* |
5650 | * Reject the command if we were asked to deactivate a schedule that | |
5651 | * doesn't exist. | |
5652 | */ | |
5653 | if (!activate && *parameter_value != new_value) { | |
5654 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as an inexistant schedule was provided"); | |
5655 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
5656 | goto end; | |
5657 | } | |
259c2674 | 5658 | |
66ea93b1 JG |
5659 | *parameter_value = activate ? new_value : 0; |
5660 | ||
5661 | switch (schedule_type) { | |
5662 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5663 | if (activate && session->active) { | |
5664 | /* | |
5665 | * Only start the timer if the session is active, | |
5666 | * otherwise it will be started when the session starts. | |
5667 | */ | |
92816cc3 JG |
5668 | ret = timer_session_rotation_schedule_timer_start( |
5669 | session, new_value); | |
259c2674 | 5670 | if (ret) { |
66ea93b1 | 5671 | ERR("Failed to enable session rotation timer in ROTATION_SET_SCHEDULE command"); |
259c2674 JD |
5672 | ret = LTTNG_ERR_UNK; |
5673 | goto end; | |
5674 | } | |
66ea93b1 | 5675 | } else { |
92816cc3 JG |
5676 | ret = timer_session_rotation_schedule_timer_stop( |
5677 | session); | |
66ea93b1 JG |
5678 | if (ret) { |
5679 | ERR("Failed to disable session rotation timer in ROTATION_SET_SCHEDULE command"); | |
5680 | ret = LTTNG_ERR_UNK; | |
f3ce6946 | 5681 | goto end; |
66ea93b1 | 5682 | } |
259c2674 | 5683 | } |
66ea93b1 JG |
5684 | break; |
5685 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5686 | if (activate) { | |
5687 | ret = subscribe_session_consumed_size_rotation(session, | |
5688 | new_value, notification_thread_handle); | |
90936dcf | 5689 | if (ret) { |
66ea93b1 | 5690 | ERR("Failed to enable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5691 | ret = LTTNG_ERR_UNK; |
5692 | goto end; | |
5693 | } | |
90936dcf | 5694 | } else { |
66ea93b1 JG |
5695 | ret = unsubscribe_session_consumed_size_rotation(session, |
5696 | notification_thread_handle); | |
90936dcf | 5697 | if (ret) { |
66ea93b1 | 5698 | ERR("Failed to disable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5699 | ret = LTTNG_ERR_UNK; |
5700 | goto end; | |
5701 | } | |
66ea93b1 | 5702 | |
90936dcf | 5703 | } |
66ea93b1 JG |
5704 | break; |
5705 | default: | |
5706 | /* Would have been caught before. */ | |
5707 | abort(); | |
90936dcf JD |
5708 | } |
5709 | ||
259c2674 JD |
5710 | ret = LTTNG_OK; |
5711 | ||
5712 | goto end; | |
5713 | ||
5714 | end: | |
5715 | return ret; | |
5716 | } | |
5717 | ||
a503e1ef JG |
5718 | /* Wait for a given path to be removed before continuing. */ |
5719 | static enum lttng_error_code wait_on_path(void *path_data) | |
5720 | { | |
5721 | const char *shm_path = path_data; | |
5722 | ||
5723 | DBG("Waiting for the shm path at %s to be removed before completing session destruction", | |
5724 | shm_path); | |
5725 | while (true) { | |
5726 | int ret; | |
5727 | struct stat st; | |
5728 | ||
5729 | ret = stat(shm_path, &st); | |
5730 | if (ret) { | |
5731 | if (errno != ENOENT) { | |
5732 | PERROR("stat() returned an error while checking for the existence of the shm path"); | |
5733 | } else { | |
5734 | DBG("shm path no longer exists, completing the destruction of session"); | |
5735 | } | |
5736 | break; | |
5737 | } else { | |
5738 | if (!S_ISDIR(st.st_mode)) { | |
5739 | ERR("The type of shm path %s returned by stat() is not a directory; aborting the wait for shm path removal", | |
5740 | shm_path); | |
5741 | break; | |
5742 | } | |
5743 | } | |
5744 | usleep(SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US); | |
5745 | } | |
5746 | return LTTNG_OK; | |
5747 | } | |
5748 | ||
5749 | /* | |
5750 | * Returns a pointer to a handler to run on completion of a command. | |
5751 | * Returns NULL if no handler has to be run for the last command executed. | |
5752 | */ | |
5753 | const struct cmd_completion_handler *cmd_pop_completion_handler(void) | |
5754 | { | |
5755 | struct cmd_completion_handler *handler = current_completion_handler; | |
5756 | ||
5757 | current_completion_handler = NULL; | |
5758 | return handler; | |
5759 | } | |
5760 | ||
2f77fc4b DG |
5761 | /* |
5762 | * Init command subsystem. | |
5763 | */ | |
5764 | void cmd_init(void) | |
5765 | { | |
5766 | /* | |
d88aee68 DG |
5767 | * Set network sequence index to 1 for streams to match a relayd |
5768 | * socket on the consumer side. | |
2f77fc4b | 5769 | */ |
d88aee68 DG |
5770 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
5771 | relayd_net_seq_idx = 1; | |
5772 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
5773 | |
5774 | DBG("Command subsystem initialized"); | |
5775 | } |