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 | 9 | #include "bin/lttng-sessiond/tracker.h" |
c0a66c84 | 10 | #include "common/sessiond-comm/payload.h" |
159b042f JG |
11 | #include "lttng/lttng-error.h" |
12 | #include "lttng/tracker.h" | |
6c1c0768 | 13 | #define _LGPL_SOURCE |
2f77fc4b | 14 | #include <assert.h> |
6dc3064a | 15 | #include <inttypes.h> |
2f77fc4b DG |
16 | #include <urcu/list.h> |
17 | #include <urcu/uatomic.h> | |
a503e1ef | 18 | #include <sys/stat.h> |
d2956687 | 19 | #include <stdio.h> |
2f77fc4b DG |
20 | |
21 | #include <common/defaults.h> | |
22 | #include <common/common.h> | |
23 | #include <common/sessiond-comm/sessiond-comm.h> | |
24 | #include <common/relayd/relayd.h> | |
10a50311 | 25 | #include <common/utils.h> |
f5436bfc | 26 | #include <common/compat/string.h> |
93ec662e | 27 | #include <common/kernel-ctl/kernel-ctl.h> |
b0880ae5 JG |
28 | #include <common/dynamic-buffer.h> |
29 | #include <common/buffer-view.h> | |
c0a66c84 JG |
30 | #include <common/sessiond-comm/payload.h> |
31 | #include <common/sessiond-comm/payload-view.h> | |
82b69413 | 32 | #include <common/trace-chunk.h> |
3e3665b8 | 33 | #include <lttng/location-internal.h> |
b0880ae5 JG |
34 | #include <lttng/trigger/trigger-internal.h> |
35 | #include <lttng/condition/condition.h> | |
36 | #include <lttng/action/action.h> | |
6e21424e | 37 | #include <lttng/channel.h> |
b0880ae5 | 38 | #include <lttng/channel-internal.h> |
5c408ad8 | 39 | #include <lttng/rotate-internal.h> |
17dd1232 | 40 | #include <lttng/location-internal.h> |
b178f53e | 41 | #include <lttng/session-internal.h> |
3c02e545 | 42 | #include <lttng/userspace-probe-internal.h> |
b178f53e | 43 | #include <lttng/session-descriptor-internal.h> |
9f449915 | 44 | #include <common/string-utils/string-utils.h> |
2f77fc4b DG |
45 | |
46 | #include "channel.h" | |
47 | #include "consumer.h" | |
48 | #include "event.h" | |
8782cc74 | 49 | #include "health-sessiond.h" |
2f77fc4b DG |
50 | #include "kernel.h" |
51 | #include "kernel-consumer.h" | |
52 | #include "lttng-sessiond.h" | |
53 | #include "utils.h" | |
0dbc2034 | 54 | #include "lttng-syscall.h" |
7c1d2758 | 55 | #include "agent.h" |
93ec662e | 56 | #include "buffer-registry.h" |
b0880ae5 JG |
57 | #include "notification-thread.h" |
58 | #include "notification-thread-commands.h" | |
5c408ad8 JD |
59 | #include "rotate.h" |
60 | #include "rotation-thread.h" | |
8e319828 | 61 | #include "timer.h" |
f28f9e44 | 62 | #include "agent-thread.h" |
2f77fc4b DG |
63 | |
64 | #include "cmd.h" | |
65 | ||
a503e1ef JG |
66 | /* Sleep for 100ms between each check for the shm path's deletion. */ |
67 | #define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000 | |
68 | ||
3e3665b8 JG |
69 | struct cmd_destroy_session_reply_context { |
70 | int reply_sock_fd; | |
71 | bool implicit_rotation_on_destroy; | |
3285a971 JG |
72 | /* |
73 | * Indicates whether or not an error occurred while launching the | |
74 | * destruction of a session. | |
75 | */ | |
76 | enum lttng_error_code destruction_status; | |
3e3665b8 JG |
77 | }; |
78 | ||
a503e1ef JG |
79 | static enum lttng_error_code wait_on_path(void *path); |
80 | ||
81 | /* | |
82 | * Command completion handler that is used by the destroy command | |
83 | * when a session that has a non-default shm_path is being destroyed. | |
84 | * | |
85 | * See comment in cmd_destroy_session() for the rationale. | |
86 | */ | |
87 | static struct destroy_completion_handler { | |
88 | struct cmd_completion_handler handler; | |
89 | char shm_path[member_sizeof(struct ltt_session, shm_path)]; | |
90 | } destroy_completion_handler = { | |
91 | .handler = { | |
92 | .run = wait_on_path, | |
93 | .data = destroy_completion_handler.shm_path | |
94 | }, | |
95 | .shm_path = { 0 }, | |
96 | }; | |
97 | ||
98 | static struct cmd_completion_handler *current_completion_handler; | |
99 | ||
2f77fc4b DG |
100 | /* |
101 | * Used to keep a unique index for each relayd socket created where this value | |
102 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
103 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
104 | * held. | |
2f77fc4b | 105 | */ |
d88aee68 DG |
106 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
107 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 108 | |
7076b56e JG |
109 | static int validate_ust_event_name(const char *); |
110 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 111 | const struct lttng_domain *domain, |
7076b56e JG |
112 | char *channel_name, struct lttng_event *event, |
113 | char *filter_expression, | |
114 | struct lttng_filter_bytecode *filter, | |
115 | struct lttng_event_exclusion *exclusion, | |
116 | int wpipe); | |
117 | ||
2f77fc4b DG |
118 | /* |
119 | * Create a session path used by list_lttng_sessions for the case that the | |
120 | * session consumer is on the network. | |
121 | */ | |
122 | static int build_network_session_path(char *dst, size_t size, | |
123 | struct ltt_session *session) | |
124 | { | |
125 | int ret, kdata_port, udata_port; | |
126 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
127 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
128 | ||
129 | assert(session); | |
130 | assert(dst); | |
131 | ||
132 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
133 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
134 | ||
135 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
136 | ||
137 | if (session->kernel_session && session->kernel_session->consumer) { | |
138 | kuri = &session->kernel_session->consumer->dst.net.control; | |
139 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
140 | } | |
141 | ||
142 | if (session->ust_session && session->ust_session->consumer) { | |
143 | uuri = &session->ust_session->consumer->dst.net.control; | |
144 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
145 | } | |
146 | ||
147 | if (uuri == NULL && kuri == NULL) { | |
148 | uri = &session->consumer->dst.net.control; | |
149 | kdata_port = session->consumer->dst.net.data.port; | |
150 | } else if (kuri && uuri) { | |
151 | ret = uri_compare(kuri, uuri); | |
152 | if (ret) { | |
153 | /* Not Equal */ | |
154 | uri = kuri; | |
155 | /* Build uuri URL string */ | |
156 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
157 | if (ret < 0) { | |
158 | goto error; | |
159 | } | |
160 | } else { | |
161 | uri = kuri; | |
162 | } | |
163 | } else if (kuri && uuri == NULL) { | |
164 | uri = kuri; | |
165 | } else if (uuri && kuri == NULL) { | |
166 | uri = uuri; | |
167 | } | |
168 | ||
169 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
170 | if (ret < 0) { | |
171 | goto error; | |
172 | } | |
173 | ||
9aa9f900 DG |
174 | /* |
175 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
176 | * to print. | |
177 | */ | |
9d035200 | 178 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
179 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
180 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
181 | } else { | |
9aa9f900 | 182 | int dport; |
bef08707 | 183 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
184 | dport = kdata_port; |
185 | } else { | |
186 | /* No kernel URI, use the UST port. */ | |
187 | dport = udata_port; | |
188 | } | |
189 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
190 | } |
191 | ||
192 | error: | |
193 | return ret; | |
194 | } | |
195 | ||
fb83fe64 JD |
196 | /* |
197 | * Get run-time attributes if the session has been started (discarded events, | |
198 | * lost packets). | |
199 | */ | |
200 | static int get_kernel_runtime_stats(struct ltt_session *session, | |
201 | struct ltt_kernel_channel *kchan, uint64_t *discarded_events, | |
202 | uint64_t *lost_packets) | |
203 | { | |
204 | int ret; | |
205 | ||
206 | if (!session->has_been_started) { | |
207 | ret = 0; | |
208 | *discarded_events = 0; | |
209 | *lost_packets = 0; | |
210 | goto end; | |
211 | } | |
212 | ||
e1f3997a | 213 | ret = consumer_get_discarded_events(session->id, kchan->key, |
fb83fe64 JD |
214 | session->kernel_session->consumer, |
215 | discarded_events); | |
216 | if (ret < 0) { | |
217 | goto end; | |
218 | } | |
219 | ||
e1f3997a | 220 | ret = consumer_get_lost_packets(session->id, kchan->key, |
fb83fe64 JD |
221 | session->kernel_session->consumer, |
222 | lost_packets); | |
223 | if (ret < 0) { | |
224 | goto end; | |
225 | } | |
226 | ||
227 | end: | |
228 | return ret; | |
229 | } | |
230 | ||
231 | /* | |
232 | * Get run-time attributes if the session has been started (discarded events, | |
233 | * lost packets). | |
234 | */ | |
235 | static int get_ust_runtime_stats(struct ltt_session *session, | |
236 | struct ltt_ust_channel *uchan, uint64_t *discarded_events, | |
237 | uint64_t *lost_packets) | |
238 | { | |
239 | int ret; | |
240 | struct ltt_ust_session *usess; | |
241 | ||
a91c5803 JG |
242 | if (!discarded_events || !lost_packets) { |
243 | ret = -1; | |
244 | goto end; | |
245 | } | |
246 | ||
fb83fe64 | 247 | usess = session->ust_session; |
a905c624 JG |
248 | assert(discarded_events); |
249 | assert(lost_packets); | |
fb83fe64 JD |
250 | |
251 | if (!usess || !session->has_been_started) { | |
252 | *discarded_events = 0; | |
253 | *lost_packets = 0; | |
254 | ret = 0; | |
255 | goto end; | |
256 | } | |
257 | ||
258 | if (usess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
259 | ret = ust_app_uid_get_channel_runtime_stats(usess->id, | |
260 | &usess->buffer_reg_uid_list, | |
261 | usess->consumer, uchan->id, | |
262 | uchan->attr.overwrite, | |
263 | discarded_events, | |
264 | lost_packets); | |
265 | } else if (usess->buffer_type == LTTNG_BUFFER_PER_PID) { | |
266 | ret = ust_app_pid_get_channel_runtime_stats(usess, | |
267 | uchan, usess->consumer, | |
268 | uchan->attr.overwrite, | |
269 | discarded_events, | |
270 | lost_packets); | |
271 | if (ret < 0) { | |
272 | goto end; | |
273 | } | |
274 | *discarded_events += uchan->per_pid_closed_app_discarded; | |
275 | *lost_packets += uchan->per_pid_closed_app_lost; | |
276 | } else { | |
277 | ERR("Unsupported buffer type"); | |
967bc289 | 278 | assert(0); |
fb83fe64 JD |
279 | ret = -1; |
280 | goto end; | |
281 | } | |
282 | ||
283 | end: | |
284 | return ret; | |
285 | } | |
286 | ||
2f77fc4b DG |
287 | /* |
288 | * Fill lttng_channel array of all channels. | |
289 | */ | |
d449df4a | 290 | static ssize_t list_lttng_channels(enum lttng_domain_type domain, |
fb83fe64 | 291 | struct ltt_session *session, struct lttng_channel *channels, |
cf0bcb51 | 292 | struct lttng_channel_extended *chan_exts) |
2f77fc4b | 293 | { |
d449df4a | 294 | int i = 0, ret = 0; |
2f77fc4b DG |
295 | struct ltt_kernel_channel *kchan; |
296 | ||
297 | DBG("Listing channels for session %s", session->name); | |
298 | ||
299 | switch (domain) { | |
300 | case LTTNG_DOMAIN_KERNEL: | |
301 | /* Kernel channels */ | |
302 | if (session->kernel_session != NULL) { | |
303 | cds_list_for_each_entry(kchan, | |
304 | &session->kernel_session->channel_list.head, list) { | |
fb83fe64 | 305 | uint64_t discarded_events, lost_packets; |
cf0bcb51 JG |
306 | struct lttng_channel_extended *extended; |
307 | ||
308 | extended = (struct lttng_channel_extended *) | |
309 | kchan->channel->attr.extended.ptr; | |
fb83fe64 JD |
310 | |
311 | ret = get_kernel_runtime_stats(session, kchan, | |
312 | &discarded_events, &lost_packets); | |
313 | if (ret < 0) { | |
314 | goto end; | |
315 | } | |
2f77fc4b DG |
316 | /* Copy lttng_channel struct to array */ |
317 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
318 | channels[i].enabled = kchan->enabled; | |
fb83fe64 JD |
319 | chan_exts[i].discarded_events = |
320 | discarded_events; | |
321 | chan_exts[i].lost_packets = lost_packets; | |
cf0bcb51 JG |
322 | chan_exts[i].monitor_timer_interval = |
323 | extended->monitor_timer_interval; | |
491d1539 | 324 | chan_exts[i].blocking_timeout = 0; |
2f77fc4b DG |
325 | i++; |
326 | } | |
327 | } | |
328 | break; | |
329 | case LTTNG_DOMAIN_UST: | |
330 | { | |
331 | struct lttng_ht_iter iter; | |
332 | struct ltt_ust_channel *uchan; | |
333 | ||
e7fe706f | 334 | rcu_read_lock(); |
2f77fc4b DG |
335 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
336 | &iter.iter, uchan, node.node) { | |
a91c5803 | 337 | uint64_t discarded_events = 0, lost_packets = 0; |
fb83fe64 | 338 | |
8ee609c8 MD |
339 | if (lttng_strncpy(channels[i].name, uchan->name, |
340 | LTTNG_SYMBOL_NAME_LEN)) { | |
341 | break; | |
342 | } | |
2f77fc4b DG |
343 | channels[i].attr.overwrite = uchan->attr.overwrite; |
344 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
345 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
346 | channels[i].attr.switch_timer_interval = | |
347 | uchan->attr.switch_timer_interval; | |
348 | channels[i].attr.read_timer_interval = | |
349 | uchan->attr.read_timer_interval; | |
350 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
351 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
352 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
5e4435a4 JG |
353 | |
354 | /* | |
355 | * Map enum lttng_ust_output to enum lttng_event_output. | |
356 | */ | |
2f77fc4b DG |
357 | switch (uchan->attr.output) { |
358 | case LTTNG_UST_MMAP: | |
2f77fc4b DG |
359 | channels[i].attr.output = LTTNG_EVENT_MMAP; |
360 | break; | |
5e4435a4 JG |
361 | default: |
362 | /* | |
363 | * LTTNG_UST_MMAP is the only supported UST | |
364 | * output mode. | |
365 | */ | |
366 | assert(0); | |
367 | break; | |
2f77fc4b | 368 | } |
fb83fe64 | 369 | |
d449df4a MD |
370 | chan_exts[i].monitor_timer_interval = |
371 | uchan->monitor_timer_interval; | |
491d1539 MD |
372 | chan_exts[i].blocking_timeout = |
373 | uchan->attr.u.s.blocking_timeout; | |
d449df4a | 374 | |
fb83fe64 JD |
375 | ret = get_ust_runtime_stats(session, uchan, |
376 | &discarded_events, &lost_packets); | |
377 | if (ret < 0) { | |
378 | break; | |
379 | } | |
380 | chan_exts[i].discarded_events = discarded_events; | |
381 | chan_exts[i].lost_packets = lost_packets; | |
2f77fc4b DG |
382 | i++; |
383 | } | |
e7fe706f | 384 | rcu_read_unlock(); |
2f77fc4b DG |
385 | break; |
386 | } | |
387 | default: | |
388 | break; | |
389 | } | |
fb83fe64 JD |
390 | |
391 | end: | |
d449df4a MD |
392 | if (ret < 0) { |
393 | return -LTTNG_ERR_FATAL; | |
394 | } else { | |
395 | return LTTNG_OK; | |
396 | } | |
2f77fc4b DG |
397 | } |
398 | ||
3c02e545 FD |
399 | static int increment_extended_len(const char *filter_expression, |
400 | struct lttng_event_exclusion *exclusion, | |
401 | const struct lttng_userspace_probe_location *probe_location, | |
402 | size_t *extended_len) | |
b4e3ceb9 | 403 | { |
3c02e545 FD |
404 | int ret = 0; |
405 | ||
b4e3ceb9 PP |
406 | *extended_len += sizeof(struct lttcomm_event_extended_header); |
407 | ||
408 | if (filter_expression) { | |
409 | *extended_len += strlen(filter_expression) + 1; | |
410 | } | |
795d57ce PP |
411 | |
412 | if (exclusion) { | |
413 | *extended_len += exclusion->count * LTTNG_SYMBOL_NAME_LEN; | |
414 | } | |
3c02e545 FD |
415 | |
416 | if (probe_location) { | |
417 | ret = lttng_userspace_probe_location_serialize(probe_location, | |
418 | NULL, NULL); | |
419 | if (ret < 0) { | |
420 | goto end; | |
421 | } | |
422 | *extended_len += ret; | |
423 | } | |
424 | ret = 0; | |
425 | end: | |
426 | return ret; | |
b4e3ceb9 PP |
427 | } |
428 | ||
3c02e545 FD |
429 | static int append_extended_info(const char *filter_expression, |
430 | struct lttng_event_exclusion *exclusion, | |
431 | struct lttng_userspace_probe_location *probe_location, | |
432 | void **extended_at) | |
b4e3ceb9 | 433 | { |
3c02e545 | 434 | int ret = 0; |
b4e3ceb9 | 435 | size_t filter_len = 0; |
795d57ce | 436 | size_t nb_exclusions = 0; |
3c02e545 FD |
437 | size_t userspace_probe_location_len = 0; |
438 | struct lttng_dynamic_buffer location_buffer; | |
439 | struct lttcomm_event_extended_header extended_header; | |
b4e3ceb9 PP |
440 | |
441 | if (filter_expression) { | |
442 | filter_len = strlen(filter_expression) + 1; | |
443 | } | |
444 | ||
795d57ce PP |
445 | if (exclusion) { |
446 | nb_exclusions = exclusion->count; | |
447 | } | |
448 | ||
3c02e545 FD |
449 | if (probe_location) { |
450 | lttng_dynamic_buffer_init(&location_buffer); | |
451 | ret = lttng_userspace_probe_location_serialize(probe_location, | |
452 | &location_buffer, NULL); | |
453 | if (ret < 0) { | |
454 | ret = -1; | |
455 | goto end; | |
456 | } | |
457 | userspace_probe_location_len = location_buffer.size; | |
458 | } | |
459 | ||
795d57ce | 460 | /* Set header fields */ |
b4e3ceb9 | 461 | extended_header.filter_len = filter_len; |
795d57ce | 462 | extended_header.nb_exclusions = nb_exclusions; |
3c02e545 | 463 | extended_header.userspace_probe_location_len = userspace_probe_location_len; |
795d57ce PP |
464 | |
465 | /* Copy header */ | |
b4e3ceb9 PP |
466 | memcpy(*extended_at, &extended_header, sizeof(extended_header)); |
467 | *extended_at += sizeof(extended_header); | |
795d57ce PP |
468 | |
469 | /* Copy filter string */ | |
470 | if (filter_expression) { | |
471 | memcpy(*extended_at, filter_expression, filter_len); | |
472 | *extended_at += filter_len; | |
473 | } | |
474 | ||
475 | /* Copy exclusion names */ | |
476 | if (exclusion) { | |
477 | size_t len = nb_exclusions * LTTNG_SYMBOL_NAME_LEN; | |
478 | ||
479 | memcpy(*extended_at, &exclusion->names, len); | |
480 | *extended_at += len; | |
481 | } | |
3c02e545 FD |
482 | |
483 | if (probe_location) { | |
484 | memcpy(*extended_at, location_buffer.data, location_buffer.size); | |
485 | *extended_at += location_buffer.size; | |
486 | lttng_dynamic_buffer_reset(&location_buffer); | |
487 | } | |
488 | ret = 0; | |
489 | end: | |
490 | return ret; | |
b4e3ceb9 PP |
491 | } |
492 | ||
3c6a091f | 493 | /* |
022d91ba | 494 | * Create a list of agent domain events. |
3c6a091f DG |
495 | * |
496 | * Return number of events in list on success or else a negative value. | |
497 | */ | |
022d91ba | 498 | static int list_lttng_agent_events(struct agent *agt, |
b4e3ceb9 | 499 | struct lttng_event **events, size_t *total_size) |
3c6a091f DG |
500 | { |
501 | int i = 0, ret = 0; | |
502 | unsigned int nb_event = 0; | |
022d91ba | 503 | struct agent_event *event; |
47e52862 | 504 | struct lttng_event *tmp_events = NULL; |
3c6a091f | 505 | struct lttng_ht_iter iter; |
b4e3ceb9 PP |
506 | size_t extended_len = 0; |
507 | void *extended_at; | |
3c6a091f | 508 | |
022d91ba | 509 | assert(agt); |
3c6a091f DG |
510 | assert(events); |
511 | ||
022d91ba | 512 | DBG3("Listing agent events"); |
3c6a091f | 513 | |
e5bbf678 | 514 | rcu_read_lock(); |
022d91ba | 515 | nb_event = lttng_ht_get_count(agt->events); |
e5bbf678 | 516 | rcu_read_unlock(); |
3c6a091f DG |
517 | if (nb_event == 0) { |
518 | ret = nb_event; | |
b4e3ceb9 | 519 | *total_size = 0; |
3c6a091f DG |
520 | goto error; |
521 | } | |
522 | ||
b4e3ceb9 PP |
523 | /* Compute required extended infos size */ |
524 | extended_len = nb_event * sizeof(struct lttcomm_event_extended_header); | |
525 | ||
526 | /* | |
527 | * This is only valid because the commands which add events are | |
528 | * processed in the same thread as the listing. | |
529 | */ | |
530 | rcu_read_lock(); | |
531 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { | |
3c02e545 | 532 | ret = increment_extended_len(event->filter_expression, NULL, NULL, |
795d57ce | 533 | &extended_len); |
3c02e545 FD |
534 | if (ret) { |
535 | DBG("Error computing the length of extended info message"); | |
536 | ret = -LTTNG_ERR_FATAL; | |
537 | goto error; | |
538 | } | |
b4e3ceb9 PP |
539 | } |
540 | rcu_read_unlock(); | |
541 | ||
542 | *total_size = nb_event * sizeof(*tmp_events) + extended_len; | |
543 | tmp_events = zmalloc(*total_size); | |
3c6a091f | 544 | if (!tmp_events) { |
022d91ba | 545 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
546 | ret = -LTTNG_ERR_FATAL; |
547 | goto error; | |
548 | } | |
549 | ||
b4e3ceb9 PP |
550 | extended_at = ((uint8_t *) tmp_events) + |
551 | nb_event * sizeof(struct lttng_event); | |
552 | ||
3c6a091f | 553 | rcu_read_lock(); |
022d91ba | 554 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
555 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
556 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
557 | tmp_events[i].enabled = event->enabled; | |
2106efa0 | 558 | tmp_events[i].loglevel = event->loglevel_value; |
ff94328f | 559 | tmp_events[i].loglevel_type = event->loglevel_type; |
3c6a091f | 560 | i++; |
b4e3ceb9 PP |
561 | |
562 | /* Append extended info */ | |
3c02e545 | 563 | ret = append_extended_info(event->filter_expression, NULL, NULL, |
795d57ce | 564 | &extended_at); |
3c02e545 FD |
565 | if (ret) { |
566 | DBG("Error appending extended info message"); | |
567 | ret = -LTTNG_ERR_FATAL; | |
568 | goto error; | |
569 | } | |
3c6a091f | 570 | } |
3c6a091f DG |
571 | |
572 | *events = tmp_events; | |
573 | ret = nb_event; | |
3c02e545 | 574 | assert(nb_event == i); |
3c6a091f | 575 | |
47e52862 | 576 | end: |
3c02e545 | 577 | rcu_read_unlock(); |
3c6a091f | 578 | return ret; |
47e52862 JG |
579 | error: |
580 | free(tmp_events); | |
581 | goto end; | |
3c6a091f DG |
582 | } |
583 | ||
2f77fc4b DG |
584 | /* |
585 | * Create a list of ust global domain events. | |
586 | */ | |
587 | static int list_lttng_ust_global_events(char *channel_name, | |
b4e3ceb9 PP |
588 | struct ltt_ust_domain_global *ust_global, |
589 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
590 | { |
591 | int i = 0, ret = 0; | |
592 | unsigned int nb_event = 0; | |
593 | struct lttng_ht_iter iter; | |
594 | struct lttng_ht_node_str *node; | |
595 | struct ltt_ust_channel *uchan; | |
596 | struct ltt_ust_event *uevent; | |
597 | struct lttng_event *tmp; | |
b4e3ceb9 PP |
598 | size_t extended_len = 0; |
599 | void *extended_at; | |
2f77fc4b DG |
600 | |
601 | DBG("Listing UST global events for channel %s", channel_name); | |
602 | ||
603 | rcu_read_lock(); | |
604 | ||
605 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
606 | node = lttng_ht_iter_get_node_str(&iter); | |
607 | if (node == NULL) { | |
f73fabfd | 608 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
d31d3e8c | 609 | goto end; |
2f77fc4b DG |
610 | } |
611 | ||
612 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
613 | ||
3c442be3 | 614 | nb_event = lttng_ht_get_count(uchan->events); |
2f77fc4b DG |
615 | if (nb_event == 0) { |
616 | ret = nb_event; | |
b4e3ceb9 | 617 | *total_size = 0; |
d31d3e8c | 618 | goto end; |
2f77fc4b DG |
619 | } |
620 | ||
621 | DBG3("Listing UST global %d events", nb_event); | |
622 | ||
b4e3ceb9 PP |
623 | /* Compute required extended infos size */ |
624 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
625 | if (uevent->internal) { | |
626 | nb_event--; | |
627 | continue; | |
628 | } | |
629 | ||
3c02e545 FD |
630 | ret = increment_extended_len(uevent->filter_expression, |
631 | uevent->exclusion, NULL, &extended_len); | |
632 | if (ret) { | |
633 | DBG("Error computing the length of extended info message"); | |
634 | ret = -LTTNG_ERR_FATAL; | |
635 | goto end; | |
636 | } | |
b4e3ceb9 | 637 | } |
d31d3e8c PP |
638 | if (nb_event == 0) { |
639 | /* All events are internal, skip. */ | |
640 | ret = 0; | |
641 | *total_size = 0; | |
642 | goto end; | |
643 | } | |
b4e3ceb9 PP |
644 | |
645 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
646 | tmp = zmalloc(*total_size); | |
2f77fc4b | 647 | if (tmp == NULL) { |
b12c38df JG |
648 | ret = -LTTNG_ERR_FATAL; |
649 | goto end; | |
2f77fc4b DG |
650 | } |
651 | ||
b4e3ceb9 PP |
652 | extended_at = ((uint8_t *) tmp) + nb_event * sizeof(struct lttng_event); |
653 | ||
2f77fc4b | 654 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
3c442be3 JG |
655 | if (uevent->internal) { |
656 | /* This event should remain hidden from clients */ | |
3c442be3 JG |
657 | continue; |
658 | } | |
2f77fc4b DG |
659 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
660 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
661 | tmp[i].enabled = uevent->enabled; | |
662 | ||
663 | switch (uevent->attr.instrumentation) { | |
664 | case LTTNG_UST_TRACEPOINT: | |
665 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
666 | break; | |
667 | case LTTNG_UST_PROBE: | |
668 | tmp[i].type = LTTNG_EVENT_PROBE; | |
669 | break; | |
670 | case LTTNG_UST_FUNCTION: | |
671 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
672 | break; | |
673 | } | |
674 | ||
675 | tmp[i].loglevel = uevent->attr.loglevel; | |
676 | switch (uevent->attr.loglevel_type) { | |
677 | case LTTNG_UST_LOGLEVEL_ALL: | |
678 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
679 | break; | |
680 | case LTTNG_UST_LOGLEVEL_RANGE: | |
681 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
682 | break; | |
683 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
684 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
685 | break; | |
686 | } | |
687 | if (uevent->filter) { | |
688 | tmp[i].filter = 1; | |
689 | } | |
4634f12e JI |
690 | if (uevent->exclusion) { |
691 | tmp[i].exclusion = 1; | |
692 | } | |
2f77fc4b | 693 | i++; |
b4e3ceb9 PP |
694 | |
695 | /* Append extended info */ | |
3c02e545 FD |
696 | ret = append_extended_info(uevent->filter_expression, |
697 | uevent->exclusion, NULL, &extended_at); | |
698 | if (ret) { | |
699 | DBG("Error appending extended info message"); | |
700 | ret = -LTTNG_ERR_FATAL; | |
701 | goto end; | |
702 | } | |
2f77fc4b DG |
703 | } |
704 | ||
705 | ret = nb_event; | |
706 | *events = tmp; | |
d31d3e8c | 707 | end: |
2f77fc4b DG |
708 | rcu_read_unlock(); |
709 | return ret; | |
710 | } | |
711 | ||
712 | /* | |
713 | * Fill lttng_event array of all kernel events in the channel. | |
714 | */ | |
715 | static int list_lttng_kernel_events(char *channel_name, | |
b4e3ceb9 PP |
716 | struct ltt_kernel_session *kernel_session, |
717 | struct lttng_event **events, size_t *total_size) | |
2f77fc4b DG |
718 | { |
719 | int i = 0, ret; | |
720 | unsigned int nb_event; | |
721 | struct ltt_kernel_event *event; | |
722 | struct ltt_kernel_channel *kchan; | |
b4e3ceb9 PP |
723 | size_t extended_len = 0; |
724 | void *extended_at; | |
2f77fc4b DG |
725 | |
726 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
727 | if (kchan == NULL) { | |
f73fabfd | 728 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
729 | goto error; |
730 | } | |
731 | ||
732 | nb_event = kchan->event_count; | |
733 | ||
734 | DBG("Listing events for channel %s", kchan->channel->name); | |
735 | ||
736 | if (nb_event == 0) { | |
b4e3ceb9 | 737 | *total_size = 0; |
834978fd | 738 | *events = NULL; |
db906c12 | 739 | goto end; |
2f77fc4b DG |
740 | } |
741 | ||
b4e3ceb9 PP |
742 | /* Compute required extended infos size */ |
743 | cds_list_for_each_entry(event, &kchan->events_list.head, list) { | |
3c02e545 FD |
744 | ret = increment_extended_len(event->filter_expression, NULL, |
745 | event->userspace_probe_location, | |
795d57ce | 746 | &extended_len); |
3c02e545 FD |
747 | if (ret) { |
748 | DBG("Error computing the length of extended info message"); | |
749 | ret = -LTTNG_ERR_FATAL; | |
750 | goto error; | |
751 | } | |
b4e3ceb9 PP |
752 | } |
753 | ||
754 | *total_size = nb_event * sizeof(struct lttng_event) + extended_len; | |
755 | *events = zmalloc(*total_size); | |
2f77fc4b | 756 | if (*events == NULL) { |
3c02e545 | 757 | ret = -LTTNG_ERR_FATAL; |
2f77fc4b DG |
758 | goto error; |
759 | } | |
760 | ||
ab4aa612 | 761 | extended_at = ((void *) *events) + |
b4e3ceb9 PP |
762 | nb_event * sizeof(struct lttng_event); |
763 | ||
2f77fc4b DG |
764 | /* Kernel channels */ |
765 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
766 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
767 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
768 | (*events)[i].enabled = event->enabled; | |
00f992f2 JG |
769 | (*events)[i].filter = |
770 | (unsigned char) !!event->filter_expression; | |
2f77fc4b DG |
771 | |
772 | switch (event->event->instrumentation) { | |
773 | case LTTNG_KERNEL_TRACEPOINT: | |
774 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
775 | break; | |
2f77fc4b | 776 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
777 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
778 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
779 | sizeof(struct lttng_kernel_kprobe)); | |
780 | break; | |
781 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
782 | (*events)[i].type = LTTNG_EVENT_PROBE; |
783 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
784 | sizeof(struct lttng_kernel_kprobe)); | |
785 | break; | |
b955b4d4 FD |
786 | case LTTNG_KERNEL_UPROBE: |
787 | (*events)[i].type = LTTNG_EVENT_USERSPACE_PROBE; | |
788 | break; | |
2f77fc4b DG |
789 | case LTTNG_KERNEL_FUNCTION: |
790 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
791 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
792 | sizeof(struct lttng_kernel_function)); | |
793 | break; | |
794 | case LTTNG_KERNEL_NOOP: | |
795 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
796 | break; | |
797 | case LTTNG_KERNEL_SYSCALL: | |
798 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
799 | break; | |
800 | case LTTNG_KERNEL_ALL: | |
1ab8c2ad FD |
801 | /* fall-through. */ |
802 | default: | |
2f77fc4b DG |
803 | assert(0); |
804 | break; | |
805 | } | |
806 | i++; | |
b4e3ceb9 PP |
807 | |
808 | /* Append extended info */ | |
3c02e545 FD |
809 | ret = append_extended_info(event->filter_expression, NULL, |
810 | event->userspace_probe_location, &extended_at); | |
811 | if (ret) { | |
812 | DBG("Error appending extended info message"); | |
813 | ret = -LTTNG_ERR_FATAL; | |
814 | goto error; | |
815 | } | |
2f77fc4b DG |
816 | } |
817 | ||
db906c12 | 818 | end: |
2f77fc4b DG |
819 | return nb_event; |
820 | ||
821 | error: | |
f73fabfd DG |
822 | /* Negate the error code to differentiate the size from an error */ |
823 | return -ret; | |
2f77fc4b DG |
824 | } |
825 | ||
826 | /* | |
827 | * Add URI so the consumer output object. Set the correct path depending on the | |
828 | * domain adding the default trace directory. | |
829 | */ | |
b178f53e JG |
830 | static enum lttng_error_code add_uri_to_consumer( |
831 | const struct ltt_session *session, | |
832 | struct consumer_output *consumer, | |
833 | struct lttng_uri *uri, enum lttng_domain_type domain) | |
2f77fc4b | 834 | { |
b178f53e JG |
835 | int ret; |
836 | enum lttng_error_code ret_code = LTTNG_OK; | |
2f77fc4b DG |
837 | |
838 | assert(uri); | |
839 | ||
840 | if (consumer == NULL) { | |
841 | DBG("No consumer detected. Don't add URI. Stopping."); | |
b178f53e | 842 | ret_code = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
843 | goto error; |
844 | } | |
845 | ||
846 | switch (domain) { | |
847 | case LTTNG_DOMAIN_KERNEL: | |
b178f53e JG |
848 | ret = lttng_strncpy(consumer->domain_subdir, |
849 | DEFAULT_KERNEL_TRACE_DIR, | |
850 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
851 | break; |
852 | case LTTNG_DOMAIN_UST: | |
b178f53e JG |
853 | ret = lttng_strncpy(consumer->domain_subdir, |
854 | DEFAULT_UST_TRACE_DIR, | |
855 | sizeof(consumer->domain_subdir)); | |
2f77fc4b DG |
856 | break; |
857 | default: | |
858 | /* | |
b178f53e JG |
859 | * This case is possible is we try to add the URI to the global |
860 | * tracing session consumer object which in this case there is | |
861 | * no subdir. | |
2f77fc4b | 862 | */ |
b178f53e JG |
863 | memset(consumer->domain_subdir, 0, |
864 | sizeof(consumer->domain_subdir)); | |
865 | ret = 0; | |
866 | } | |
867 | if (ret) { | |
868 | ERR("Failed to initialize consumer output domain subdirectory"); | |
869 | ret_code = LTTNG_ERR_FATAL; | |
870 | goto error; | |
2f77fc4b DG |
871 | } |
872 | ||
873 | switch (uri->dtype) { | |
874 | case LTTNG_DST_IPV4: | |
875 | case LTTNG_DST_IPV6: | |
876 | DBG2("Setting network URI to consumer"); | |
877 | ||
df75acac DG |
878 | if (consumer->type == CONSUMER_DST_NET) { |
879 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
880 | consumer->dst.net.control_isset) || |
881 | (uri->stype == LTTNG_STREAM_DATA && | |
882 | consumer->dst.net.data_isset)) { | |
b178f53e | 883 | ret_code = LTTNG_ERR_URL_EXIST; |
df75acac DG |
884 | goto error; |
885 | } | |
886 | } else { | |
b178f53e | 887 | memset(&consumer->dst, 0, sizeof(consumer->dst)); |
785d2d0d DG |
888 | } |
889 | ||
2f77fc4b | 890 | /* Set URI into consumer output object */ |
b178f53e | 891 | ret = consumer_set_network_uri(session, consumer, uri); |
2f77fc4b | 892 | if (ret < 0) { |
b178f53e | 893 | ret_code = -ret; |
2f77fc4b DG |
894 | goto error; |
895 | } else if (ret == 1) { | |
896 | /* | |
897 | * URI was the same in the consumer so we do not append the subdir | |
898 | * again so to not duplicate output dir. | |
899 | */ | |
b178f53e | 900 | ret_code = LTTNG_OK; |
2f77fc4b DG |
901 | goto error; |
902 | } | |
2f77fc4b DG |
903 | break; |
904 | case LTTNG_DST_PATH: | |
b178f53e JG |
905 | if (*uri->dst.path != '/' || strstr(uri->dst.path, "../")) { |
906 | ret_code = LTTNG_ERR_INVALID; | |
9ac05d92 MD |
907 | goto error; |
908 | } | |
b178f53e JG |
909 | DBG2("Setting trace directory path from URI to %s", |
910 | uri->dst.path); | |
911 | memset(&consumer->dst, 0, sizeof(consumer->dst)); | |
912 | ||
913 | ret = lttng_strncpy(consumer->dst.session_root_path, | |
914 | uri->dst.path, | |
915 | sizeof(consumer->dst.session_root_path)); | |
4df41cad JG |
916 | if (ret) { |
917 | ret_code = LTTNG_ERR_FATAL; | |
918 | goto error; | |
919 | } | |
2f77fc4b DG |
920 | consumer->type = CONSUMER_DST_LOCAL; |
921 | break; | |
922 | } | |
923 | ||
b178f53e | 924 | ret_code = LTTNG_OK; |
2f77fc4b | 925 | error: |
b178f53e | 926 | return ret_code; |
2f77fc4b DG |
927 | } |
928 | ||
929 | /* | |
930 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
931 | */ | |
932 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
933 | { | |
934 | int ret = 0; | |
935 | struct lttng_ht_iter iter; | |
936 | struct consumer_socket *socket; | |
937 | ||
938 | assert(session); | |
939 | ||
e7fe706f DG |
940 | rcu_read_lock(); |
941 | ||
2f77fc4b DG |
942 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
943 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
944 | socket, node.node) { | |
2f77fc4b | 945 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 946 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
947 | pthread_mutex_unlock(socket->lock); |
948 | if (ret < 0) { | |
f73fabfd | 949 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
950 | goto error; |
951 | } | |
952 | } | |
953 | } | |
954 | ||
955 | error: | |
e7fe706f | 956 | rcu_read_unlock(); |
2f77fc4b DG |
957 | return ret; |
958 | } | |
959 | ||
960 | /* | |
961 | * Create a socket to the relayd using the URI. | |
962 | * | |
963 | * On success, the relayd_sock pointer is set to the created socket. | |
9a654598 | 964 | * Else, it remains untouched and an LTTng error code is returned. |
2f77fc4b | 965 | */ |
9a654598 | 966 | static enum lttng_error_code create_connect_relayd(struct lttng_uri *uri, |
b31610f2 JD |
967 | struct lttcomm_relayd_sock **relayd_sock, |
968 | struct consumer_output *consumer) | |
2f77fc4b DG |
969 | { |
970 | int ret; | |
9a654598 | 971 | enum lttng_error_code status = LTTNG_OK; |
6151a90f | 972 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 973 | |
6151a90f JD |
974 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
975 | RELAYD_VERSION_COMM_MINOR); | |
976 | if (!rsock) { | |
9a654598 | 977 | status = LTTNG_ERR_FATAL; |
2f77fc4b DG |
978 | goto error; |
979 | } | |
980 | ||
ffe60014 DG |
981 | /* |
982 | * Connect to relayd so we can proceed with a session creation. This call | |
983 | * can possibly block for an arbitrary amount of time to set the health | |
984 | * state to be in poll execution. | |
985 | */ | |
986 | health_poll_entry(); | |
6151a90f | 987 | ret = relayd_connect(rsock); |
ffe60014 | 988 | health_poll_exit(); |
2f77fc4b DG |
989 | if (ret < 0) { |
990 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 991 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
992 | goto free_sock; |
993 | } | |
994 | ||
995 | /* Create socket for control stream. */ | |
996 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
eacb7b6f MD |
997 | uint64_t result_flags; |
998 | ||
2f77fc4b DG |
999 | DBG3("Creating relayd stream socket from URI"); |
1000 | ||
1001 | /* Check relayd version */ | |
6151a90f | 1002 | ret = relayd_version_check(rsock); |
67d5aa28 | 1003 | if (ret == LTTNG_ERR_RELAYD_VERSION_FAIL) { |
9a654598 | 1004 | status = LTTNG_ERR_RELAYD_VERSION_FAIL; |
67d5aa28 JD |
1005 | goto close_sock; |
1006 | } else if (ret < 0) { | |
1007 | ERR("Unable to reach lttng-relayd"); | |
9a654598 | 1008 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
1009 | goto close_sock; |
1010 | } | |
b31610f2 JD |
1011 | consumer->relay_major_version = rsock->major; |
1012 | consumer->relay_minor_version = rsock->minor; | |
eacb7b6f MD |
1013 | ret = relayd_get_configuration(rsock, 0, |
1014 | &result_flags); | |
1015 | if (ret < 0) { | |
1016 | ERR("Unable to get relayd configuration"); | |
1017 | status = LTTNG_ERR_RELAYD_CONNECT_FAIL; | |
1018 | goto close_sock; | |
1019 | } | |
1020 | if (result_flags & LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED) { | |
1021 | consumer->relay_allows_clear = true; | |
1022 | } | |
2f77fc4b DG |
1023 | } else if (uri->stype == LTTNG_STREAM_DATA) { |
1024 | DBG3("Creating relayd data socket from URI"); | |
1025 | } else { | |
1026 | /* Command is not valid */ | |
1027 | ERR("Relayd invalid stream type: %d", uri->stype); | |
9a654598 | 1028 | status = LTTNG_ERR_INVALID; |
2f77fc4b DG |
1029 | goto close_sock; |
1030 | } | |
1031 | ||
6151a90f | 1032 | *relayd_sock = rsock; |
2f77fc4b | 1033 | |
9a654598 | 1034 | return status; |
2f77fc4b DG |
1035 | |
1036 | close_sock: | |
6151a90f JD |
1037 | /* The returned value is not useful since we are on an error path. */ |
1038 | (void) relayd_close(rsock); | |
2f77fc4b | 1039 | free_sock: |
6151a90f | 1040 | free(rsock); |
2f77fc4b | 1041 | error: |
9a654598 | 1042 | return status; |
2f77fc4b DG |
1043 | } |
1044 | ||
1045 | /* | |
1046 | * Connect to the relayd using URI and send the socket to the right consumer. | |
43fade62 JG |
1047 | * |
1048 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1049 | * |
1050 | * Returns LTTNG_OK on success or an LTTng error code on failure. | |
2f77fc4b | 1051 | */ |
9a654598 JG |
1052 | static enum lttng_error_code send_consumer_relayd_socket( |
1053 | unsigned int session_id, | |
3044f922 | 1054 | struct lttng_uri *relayd_uri, |
56a37563 | 1055 | struct consumer_output *consumer, |
d3e2ba59 | 1056 | struct consumer_socket *consumer_sock, |
fb9a95c4 | 1057 | const char *session_name, const char *hostname, |
6fa5fe7c | 1058 | const char *base_path, int session_live_timer, |
db1da059 | 1059 | const uint64_t *current_chunk_id, |
46ef2188 MD |
1060 | time_t session_creation_time, |
1061 | bool session_name_contains_creation_time) | |
2f77fc4b DG |
1062 | { |
1063 | int ret; | |
6151a90f | 1064 | struct lttcomm_relayd_sock *rsock = NULL; |
9a654598 | 1065 | enum lttng_error_code status; |
2f77fc4b | 1066 | |
ffe60014 | 1067 | /* Connect to relayd and make version check if uri is the control. */ |
9a654598 JG |
1068 | status = create_connect_relayd(relayd_uri, &rsock, consumer); |
1069 | if (status != LTTNG_OK) { | |
9e218353 | 1070 | goto relayd_comm_error; |
ffe60014 | 1071 | } |
6151a90f | 1072 | assert(rsock); |
ffe60014 | 1073 | |
2f77fc4b | 1074 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
1075 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
1076 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
1077 | /* |
1078 | * Increment net_seq_idx because we are about to transfer the | |
1079 | * new relayd socket to the consumer. | |
d88aee68 | 1080 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 1081 | */ |
d88aee68 DG |
1082 | consumer->net_seq_index = ++relayd_net_seq_idx; |
1083 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
1084 | } |
1085 | ||
2f77fc4b | 1086 | /* Send relayd socket to consumer. */ |
6151a90f | 1087 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 | 1088 | relayd_uri->stype, session_id, |
6fa5fe7c MD |
1089 | session_name, hostname, base_path, |
1090 | session_live_timer, current_chunk_id, | |
46ef2188 | 1091 | session_creation_time, session_name_contains_creation_time); |
2f77fc4b | 1092 | if (ret < 0) { |
9a654598 | 1093 | status = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
1094 | goto close_sock; |
1095 | } | |
1096 | ||
c890b720 DG |
1097 | /* Flag that the corresponding socket was sent. */ |
1098 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 1099 | consumer_sock->control_sock_sent = 1; |
c890b720 | 1100 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 1101 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
1102 | } |
1103 | ||
2f77fc4b DG |
1104 | /* |
1105 | * Close socket which was dup on the consumer side. The session daemon does | |
1106 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
1107 | */ | |
1108 | ||
1109 | close_sock: | |
9a654598 | 1110 | if (status != LTTNG_OK) { |
ffe60014 | 1111 | /* |
d9078d0c DG |
1112 | * The consumer output for this session should not be used anymore |
1113 | * since the relayd connection failed thus making any tracing or/and | |
1114 | * streaming not usable. | |
ffe60014 | 1115 | */ |
d9078d0c | 1116 | consumer->enabled = 0; |
ffe60014 | 1117 | } |
9e218353 JR |
1118 | (void) relayd_close(rsock); |
1119 | free(rsock); | |
1120 | ||
1121 | relayd_comm_error: | |
9a654598 | 1122 | return status; |
2f77fc4b DG |
1123 | } |
1124 | ||
1125 | /* | |
1126 | * Send both relayd sockets to a specific consumer and domain. This is a | |
1127 | * helper function to facilitate sending the information to the consumer for a | |
1128 | * session. | |
43fade62 JG |
1129 | * |
1130 | * The consumer socket lock must be held by the caller. | |
9a654598 JG |
1131 | * |
1132 | * Returns LTTNG_OK, or an LTTng error code on failure. | |
2f77fc4b | 1133 | */ |
9a654598 JG |
1134 | static enum lttng_error_code send_consumer_relayd_sockets( |
1135 | enum lttng_domain_type domain, | |
56a37563 | 1136 | unsigned int session_id, struct consumer_output *consumer, |
fb9a95c4 | 1137 | struct consumer_socket *sock, const char *session_name, |
6fa5fe7c | 1138 | const char *hostname, const char *base_path, int session_live_timer, |
46ef2188 MD |
1139 | const uint64_t *current_chunk_id, time_t session_creation_time, |
1140 | bool session_name_contains_creation_time) | |
2f77fc4b | 1141 | { |
9a654598 | 1142 | enum lttng_error_code status = LTTNG_OK; |
2f77fc4b | 1143 | |
2f77fc4b | 1144 | assert(consumer); |
6dc3064a | 1145 | assert(sock); |
2f77fc4b | 1146 | |
2f77fc4b | 1147 | /* Sending control relayd socket. */ |
ffe60014 | 1148 | if (!sock->control_sock_sent) { |
9a654598 | 1149 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1150 | &consumer->dst.net.control, consumer, sock, |
6fa5fe7c | 1151 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1152 | current_chunk_id, session_creation_time, |
1153 | session_name_contains_creation_time); | |
9a654598 | 1154 | if (status != LTTNG_OK) { |
c890b720 DG |
1155 | goto error; |
1156 | } | |
2f77fc4b DG |
1157 | } |
1158 | ||
1159 | /* Sending data relayd socket. */ | |
ffe60014 | 1160 | if (!sock->data_sock_sent) { |
9a654598 | 1161 | status = send_consumer_relayd_socket(session_id, |
d3e2ba59 | 1162 | &consumer->dst.net.data, consumer, sock, |
6fa5fe7c | 1163 | session_name, hostname, base_path, session_live_timer, |
46ef2188 MD |
1164 | current_chunk_id, session_creation_time, |
1165 | session_name_contains_creation_time); | |
9a654598 | 1166 | if (status != LTTNG_OK) { |
c890b720 DG |
1167 | goto error; |
1168 | } | |
2f77fc4b DG |
1169 | } |
1170 | ||
2f77fc4b | 1171 | error: |
9a654598 | 1172 | return status; |
2f77fc4b DG |
1173 | } |
1174 | ||
1175 | /* | |
1176 | * Setup relayd connections for a tracing session. First creates the socket to | |
1177 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
1178 | * network. | |
1179 | */ | |
ffe60014 | 1180 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 1181 | { |
f73fabfd | 1182 | int ret = LTTNG_OK; |
2f77fc4b DG |
1183 | struct ltt_ust_session *usess; |
1184 | struct ltt_kernel_session *ksess; | |
1185 | struct consumer_socket *socket; | |
1186 | struct lttng_ht_iter iter; | |
1e791a74 | 1187 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
2f77fc4b | 1188 | |
1e791a74 | 1189 | assert(session); |
2f77fc4b DG |
1190 | |
1191 | usess = session->ust_session; | |
1192 | ksess = session->kernel_session; | |
1193 | ||
785d2d0d | 1194 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 1195 | |
aa997ea3 | 1196 | rcu_read_lock(); |
1e791a74 JG |
1197 | if (session->current_trace_chunk) { |
1198 | enum lttng_trace_chunk_status status = lttng_trace_chunk_get_id( | |
1199 | session->current_trace_chunk, ¤t_chunk_id.value); | |
1200 | ||
1201 | if (status == LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1202 | current_chunk_id.is_set = true; | |
1203 | } else { | |
1204 | ERR("Failed to get current trace chunk id"); | |
1205 | ret = LTTNG_ERR_UNK; | |
1206 | goto error; | |
1207 | } | |
1208 | } | |
1209 | ||
2f77fc4b DG |
1210 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
1211 | && usess->consumer->enabled) { | |
1212 | /* For each consumer socket, send relayd sockets */ | |
1213 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
1214 | socket, node.node) { | |
2f77fc4b | 1215 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1216 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
1217 | usess->consumer, socket, |
1218 | session->name, session->hostname, | |
6fa5fe7c | 1219 | session->base_path, |
1e791a74 | 1220 | session->live_timer, |
db1da059 | 1221 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1222 | session->creation_time, |
1223 | session->name_contains_creation_time); | |
2f77fc4b | 1224 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1225 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1226 | goto error; |
1227 | } | |
6dc3064a DG |
1228 | /* Session is now ready for network streaming. */ |
1229 | session->net_handle = 1; | |
2f77fc4b | 1230 | } |
b31610f2 JD |
1231 | session->consumer->relay_major_version = |
1232 | usess->consumer->relay_major_version; | |
1233 | session->consumer->relay_minor_version = | |
1234 | usess->consumer->relay_minor_version; | |
eacb7b6f MD |
1235 | session->consumer->relay_allows_clear = |
1236 | usess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1237 | } |
1238 | ||
1239 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
1240 | && ksess->consumer->enabled) { | |
1241 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
1242 | socket, node.node) { | |
2f77fc4b | 1243 | pthread_mutex_lock(socket->lock); |
6dc3064a | 1244 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
1245 | ksess->consumer, socket, |
1246 | session->name, session->hostname, | |
6fa5fe7c | 1247 | session->base_path, |
1e791a74 | 1248 | session->live_timer, |
db1da059 | 1249 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
1250 | session->creation_time, |
1251 | session->name_contains_creation_time); | |
2f77fc4b | 1252 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 1253 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1254 | goto error; |
1255 | } | |
6dc3064a DG |
1256 | /* Session is now ready for network streaming. */ |
1257 | session->net_handle = 1; | |
2f77fc4b | 1258 | } |
b31610f2 JD |
1259 | session->consumer->relay_major_version = |
1260 | ksess->consumer->relay_major_version; | |
1261 | session->consumer->relay_minor_version = | |
1262 | ksess->consumer->relay_minor_version; | |
eacb7b6f MD |
1263 | session->consumer->relay_allows_clear = |
1264 | ksess->consumer->relay_allows_clear; | |
2f77fc4b DG |
1265 | } |
1266 | ||
1267 | error: | |
e7fe706f | 1268 | rcu_read_unlock(); |
2f77fc4b DG |
1269 | return ret; |
1270 | } | |
1271 | ||
9b6c7ec5 DG |
1272 | /* |
1273 | * Start a kernel session by opening all necessary streams. | |
1274 | */ | |
4dbe1875 | 1275 | int start_kernel_session(struct ltt_kernel_session *ksess) |
9b6c7ec5 DG |
1276 | { |
1277 | int ret; | |
1278 | struct ltt_kernel_channel *kchan; | |
1279 | ||
1280 | /* Open kernel metadata */ | |
07b86b52 | 1281 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
1282 | ret = kernel_open_metadata(ksess); |
1283 | if (ret < 0) { | |
1284 | ret = LTTNG_ERR_KERN_META_FAIL; | |
1285 | goto error; | |
1286 | } | |
1287 | } | |
1288 | ||
1289 | /* Open kernel metadata stream */ | |
07b86b52 | 1290 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
1291 | ret = kernel_open_metadata_stream(ksess); |
1292 | if (ret < 0) { | |
1293 | ERR("Kernel create metadata stream failed"); | |
1294 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1295 | goto error; | |
1296 | } | |
1297 | } | |
1298 | ||
1299 | /* For each channel */ | |
1300 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1301 | if (kchan->stream_count == 0) { | |
1302 | ret = kernel_open_channel_stream(kchan); | |
1303 | if (ret < 0) { | |
1304 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
1305 | goto error; | |
1306 | } | |
1307 | /* Update the stream global counter */ | |
1308 | ksess->stream_count_global += ret; | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | /* Setup kernel consumer socket and send fds to it */ | |
1313 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 1314 | if (ret != 0) { |
9b6c7ec5 DG |
1315 | ret = LTTNG_ERR_KERN_START_FAIL; |
1316 | goto error; | |
1317 | } | |
1318 | ||
1319 | /* This start the kernel tracing */ | |
1320 | ret = kernel_start_session(ksess); | |
1321 | if (ret < 0) { | |
1322 | ret = LTTNG_ERR_KERN_START_FAIL; | |
1323 | goto error; | |
1324 | } | |
1325 | ||
1326 | /* Quiescent wait after starting trace */ | |
7d268848 | 1327 | kernel_wait_quiescent(); |
9b6c7ec5 | 1328 | |
14fb1ebe | 1329 | ksess->active = 1; |
9b6c7ec5 DG |
1330 | |
1331 | ret = LTTNG_OK; | |
1332 | ||
1333 | error: | |
1334 | return ret; | |
1335 | } | |
1336 | ||
4dbe1875 MD |
1337 | int stop_kernel_session(struct ltt_kernel_session *ksess) |
1338 | { | |
1339 | struct ltt_kernel_channel *kchan; | |
1340 | bool error_occurred = false; | |
1341 | int ret; | |
1342 | ||
1343 | if (!ksess || !ksess->active) { | |
1344 | return LTTNG_OK; | |
1345 | } | |
1346 | DBG("Stopping kernel tracing"); | |
1347 | ||
1348 | ret = kernel_stop_session(ksess); | |
1349 | if (ret < 0) { | |
1350 | ret = LTTNG_ERR_KERN_STOP_FAIL; | |
1351 | goto error; | |
1352 | } | |
1353 | ||
1354 | kernel_wait_quiescent(); | |
1355 | ||
1356 | /* Flush metadata after stopping (if exists) */ | |
1357 | if (ksess->metadata_stream_fd >= 0) { | |
1358 | ret = kernel_metadata_flush_buffer(ksess->metadata_stream_fd); | |
1359 | if (ret < 0) { | |
1360 | ERR("Kernel metadata flush failed"); | |
1361 | error_occurred = true; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | /* Flush all buffers after stopping */ | |
1366 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
1367 | ret = kernel_flush_buffer(kchan); | |
1368 | if (ret < 0) { | |
1369 | ERR("Kernel flush buffer error"); | |
1370 | error_occurred = true; | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | ksess->active = 0; | |
1375 | if (error_occurred) { | |
1376 | ret = LTTNG_ERR_UNK; | |
1377 | } else { | |
1378 | ret = LTTNG_OK; | |
1379 | } | |
1380 | error: | |
1381 | return ret; | |
1382 | } | |
1383 | ||
2f77fc4b DG |
1384 | /* |
1385 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
1386 | */ | |
56a37563 JG |
1387 | int cmd_disable_channel(struct ltt_session *session, |
1388 | enum lttng_domain_type domain, char *channel_name) | |
2f77fc4b DG |
1389 | { |
1390 | int ret; | |
1391 | struct ltt_ust_session *usess; | |
1392 | ||
1393 | usess = session->ust_session; | |
1394 | ||
2223c96f DG |
1395 | rcu_read_lock(); |
1396 | ||
2f77fc4b DG |
1397 | switch (domain) { |
1398 | case LTTNG_DOMAIN_KERNEL: | |
1399 | { | |
1400 | ret = channel_kernel_disable(session->kernel_session, | |
1401 | channel_name); | |
f73fabfd | 1402 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1403 | goto error; |
1404 | } | |
1405 | ||
7d268848 | 1406 | kernel_wait_quiescent(); |
2f77fc4b DG |
1407 | break; |
1408 | } | |
1409 | case LTTNG_DOMAIN_UST: | |
1410 | { | |
1411 | struct ltt_ust_channel *uchan; | |
1412 | struct lttng_ht *chan_ht; | |
1413 | ||
1414 | chan_ht = usess->domain_global.channels; | |
1415 | ||
1416 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
1417 | if (uchan == NULL) { | |
f73fabfd | 1418 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1419 | goto error; |
1420 | } | |
1421 | ||
7972aab2 | 1422 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 1423 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1424 | goto error; |
1425 | } | |
1426 | break; | |
1427 | } | |
2f77fc4b | 1428 | default: |
f73fabfd | 1429 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1430 | goto error; |
1431 | } | |
1432 | ||
f73fabfd | 1433 | ret = LTTNG_OK; |
2f77fc4b DG |
1434 | |
1435 | error: | |
2223c96f | 1436 | rcu_read_unlock(); |
2f77fc4b DG |
1437 | return ret; |
1438 | } | |
1439 | ||
1440 | /* | |
1441 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1442 | * | |
1443 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1444 | */ | |
1445 | int cmd_enable_channel(struct ltt_session *session, | |
df4f5a87 | 1446 | const struct lttng_domain *domain, const struct lttng_channel *_attr, int wpipe) |
2f77fc4b DG |
1447 | { |
1448 | int ret; | |
1449 | struct ltt_ust_session *usess = session->ust_session; | |
1450 | struct lttng_ht *chan_ht; | |
1f345e94 | 1451 | size_t len; |
df4f5a87 | 1452 | struct lttng_channel attr; |
2f77fc4b DG |
1453 | |
1454 | assert(session); | |
df4f5a87 | 1455 | assert(_attr); |
7972aab2 | 1456 | assert(domain); |
2f77fc4b | 1457 | |
df4f5a87 JG |
1458 | attr = *_attr; |
1459 | len = lttng_strnlen(attr.name, sizeof(attr.name)); | |
1f345e94 PP |
1460 | |
1461 | /* Validate channel name */ | |
df4f5a87 JG |
1462 | if (attr.name[0] == '.' || |
1463 | memchr(attr.name, '/', len) != NULL) { | |
1f345e94 PP |
1464 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; |
1465 | goto end; | |
1466 | } | |
1467 | ||
df4f5a87 | 1468 | DBG("Enabling channel %s for session %s", attr.name, session->name); |
2f77fc4b | 1469 | |
03b4fdcf DG |
1470 | rcu_read_lock(); |
1471 | ||
ecc48a90 JD |
1472 | /* |
1473 | * Don't try to enable a channel if the session has been started at | |
1474 | * some point in time before. The tracer does not allow it. | |
1475 | */ | |
8382cf6f | 1476 | if (session->has_been_started) { |
ecc48a90 JD |
1477 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1478 | goto error; | |
1479 | } | |
1480 | ||
1481 | /* | |
1482 | * If the session is a live session, remove the switch timer, the | |
1483 | * live timer does the same thing but sends also synchronisation | |
1484 | * beacons for inactive streams. | |
1485 | */ | |
1486 | if (session->live_timer > 0) { | |
df4f5a87 JG |
1487 | attr.attr.live_timer_interval = session->live_timer; |
1488 | attr.attr.switch_timer_interval = 0; | |
ecc48a90 JD |
1489 | } |
1490 | ||
6e21424e JR |
1491 | /* Check for feature support */ |
1492 | switch (domain->type) { | |
1493 | case LTTNG_DOMAIN_KERNEL: | |
1494 | { | |
7d268848 | 1495 | if (kernel_supports_ring_buffer_snapshot_sample_positions() != 1) { |
6e21424e JR |
1496 | /* Sampling position of buffer is not supported */ |
1497 | WARN("Kernel tracer does not support buffer monitoring. " | |
1498 | "Setting the monitor interval timer to 0 " | |
1499 | "(disabled) for channel '%s' of session '%s'", | |
df4f5a87 JG |
1500 | attr.name, session->name); |
1501 | lttng_channel_set_monitor_timer_interval(&attr, 0); | |
6e21424e JR |
1502 | } |
1503 | break; | |
1504 | } | |
1505 | case LTTNG_DOMAIN_UST: | |
f28f9e44 | 1506 | break; |
6e21424e JR |
1507 | case LTTNG_DOMAIN_JUL: |
1508 | case LTTNG_DOMAIN_LOG4J: | |
1509 | case LTTNG_DOMAIN_PYTHON: | |
f28f9e44 JG |
1510 | if (!agent_tracing_is_enabled()) { |
1511 | DBG("Attempted to enable a channel in an agent domain but the agent thread is not running"); | |
1512 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
1513 | goto error; | |
1514 | } | |
6e21424e JR |
1515 | break; |
1516 | default: | |
1517 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1518 | goto error; | |
1519 | } | |
1520 | ||
7972aab2 | 1521 | switch (domain->type) { |
2f77fc4b DG |
1522 | case LTTNG_DOMAIN_KERNEL: |
1523 | { | |
1524 | struct ltt_kernel_channel *kchan; | |
1525 | ||
df4f5a87 | 1526 | kchan = trace_kernel_get_channel_by_name(attr.name, |
2f77fc4b DG |
1527 | session->kernel_session); |
1528 | if (kchan == NULL) { | |
54213acc JG |
1529 | if (session->snapshot.nb_output > 0 || |
1530 | session->snapshot_mode) { | |
1531 | /* Enforce mmap output for snapshot sessions. */ | |
df4f5a87 | 1532 | attr.attr.output = LTTNG_EVENT_MMAP; |
54213acc | 1533 | } |
df4f5a87 JG |
1534 | ret = channel_kernel_create(session->kernel_session, &attr, wpipe); |
1535 | if (attr.name[0] != '\0') { | |
85076754 MD |
1536 | session->kernel_session->has_non_default_channel = 1; |
1537 | } | |
2f77fc4b DG |
1538 | } else { |
1539 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1540 | } | |
1541 | ||
f73fabfd | 1542 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1543 | goto error; |
1544 | } | |
1545 | ||
7d268848 | 1546 | kernel_wait_quiescent(); |
2f77fc4b DG |
1547 | break; |
1548 | } | |
1549 | case LTTNG_DOMAIN_UST: | |
9232818f JG |
1550 | case LTTNG_DOMAIN_JUL: |
1551 | case LTTNG_DOMAIN_LOG4J: | |
1552 | case LTTNG_DOMAIN_PYTHON: | |
2f77fc4b DG |
1553 | { |
1554 | struct ltt_ust_channel *uchan; | |
1555 | ||
9232818f JG |
1556 | /* |
1557 | * FIXME | |
1558 | * | |
1559 | * Current agent implementation limitations force us to allow | |
1560 | * only one channel at once in "agent" subdomains. Each | |
1561 | * subdomain has a default channel name which must be strictly | |
1562 | * adhered to. | |
1563 | */ | |
1564 | if (domain->type == LTTNG_DOMAIN_JUL) { | |
df4f5a87 | 1565 | if (strncmp(attr.name, DEFAULT_JUL_CHANNEL_NAME, |
9232818f JG |
1566 | LTTNG_SYMBOL_NAME_LEN)) { |
1567 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1568 | goto error; | |
1569 | } | |
1570 | } else if (domain->type == LTTNG_DOMAIN_LOG4J) { | |
df4f5a87 | 1571 | if (strncmp(attr.name, DEFAULT_LOG4J_CHANNEL_NAME, |
9232818f JG |
1572 | LTTNG_SYMBOL_NAME_LEN)) { |
1573 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1574 | goto error; | |
1575 | } | |
1576 | } else if (domain->type == LTTNG_DOMAIN_PYTHON) { | |
df4f5a87 | 1577 | if (strncmp(attr.name, DEFAULT_PYTHON_CHANNEL_NAME, |
9232818f JG |
1578 | LTTNG_SYMBOL_NAME_LEN)) { |
1579 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1580 | goto error; | |
1581 | } | |
1582 | } | |
1583 | ||
2f77fc4b DG |
1584 | chan_ht = usess->domain_global.channels; |
1585 | ||
df4f5a87 | 1586 | uchan = trace_ust_find_channel_by_name(chan_ht, attr.name); |
2f77fc4b | 1587 | if (uchan == NULL) { |
df4f5a87 JG |
1588 | ret = channel_ust_create(usess, &attr, domain->buf_type); |
1589 | if (attr.name[0] != '\0') { | |
85076754 MD |
1590 | usess->has_non_default_channel = 1; |
1591 | } | |
2f77fc4b | 1592 | } else { |
7972aab2 | 1593 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1594 | } |
1595 | break; | |
1596 | } | |
2f77fc4b | 1597 | default: |
f73fabfd | 1598 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1599 | goto error; |
1600 | } | |
1601 | ||
df4f5a87 | 1602 | if (ret == LTTNG_OK && attr.attr.output != LTTNG_EVENT_MMAP) { |
54213acc JG |
1603 | session->has_non_mmap_channel = true; |
1604 | } | |
2f77fc4b | 1605 | error: |
2223c96f | 1606 | rcu_read_unlock(); |
1f345e94 | 1607 | end: |
2f77fc4b DG |
1608 | return ret; |
1609 | } | |
1610 | ||
159b042f JG |
1611 | enum lttng_error_code cmd_process_attr_tracker_get_tracking_policy( |
1612 | struct ltt_session *session, | |
1613 | enum lttng_domain_type domain, | |
1614 | enum lttng_process_attr process_attr, | |
1615 | enum lttng_tracking_policy *policy) | |
1616 | { | |
1617 | enum lttng_error_code ret_code = LTTNG_OK; | |
1618 | const struct process_attr_tracker *tracker; | |
1619 | ||
1620 | switch (domain) { | |
1621 | case LTTNG_DOMAIN_KERNEL: | |
1622 | if (!session->kernel_session) { | |
1623 | ret_code = LTTNG_ERR_INVALID; | |
1624 | goto end; | |
1625 | } | |
1626 | tracker = kernel_get_process_attr_tracker( | |
1627 | session->kernel_session, process_attr); | |
1628 | break; | |
1629 | case LTTNG_DOMAIN_UST: | |
1630 | if (!session->ust_session) { | |
1631 | ret_code = LTTNG_ERR_INVALID; | |
1632 | goto end; | |
1633 | } | |
1634 | tracker = trace_ust_get_process_attr_tracker( | |
1635 | session->ust_session, process_attr); | |
1636 | break; | |
1637 | default: | |
1638 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1639 | goto end; | |
1640 | } | |
1641 | if (tracker) { | |
1642 | *policy = process_attr_tracker_get_tracking_policy(tracker); | |
1643 | } else { | |
1644 | ret_code = LTTNG_ERR_INVALID; | |
1645 | } | |
1646 | end: | |
1647 | return ret_code; | |
1648 | } | |
1649 | ||
1650 | enum lttng_error_code cmd_process_attr_tracker_set_tracking_policy( | |
1651 | struct ltt_session *session, | |
1652 | enum lttng_domain_type domain, | |
1653 | enum lttng_process_attr process_attr, | |
1654 | enum lttng_tracking_policy policy) | |
1655 | { | |
1656 | enum lttng_error_code ret_code = LTTNG_OK; | |
1657 | ||
1658 | switch (policy) { | |
1659 | case LTTNG_TRACKING_POLICY_INCLUDE_SET: | |
1660 | case LTTNG_TRACKING_POLICY_EXCLUDE_ALL: | |
1661 | case LTTNG_TRACKING_POLICY_INCLUDE_ALL: | |
1662 | break; | |
1663 | default: | |
1664 | ret_code = LTTNG_ERR_INVALID; | |
1665 | goto end; | |
1666 | } | |
1667 | ||
1668 | switch (domain) { | |
1669 | case LTTNG_DOMAIN_KERNEL: | |
1670 | if (!session->kernel_session) { | |
1671 | ret_code = LTTNG_ERR_INVALID; | |
1672 | goto end; | |
1673 | } | |
1674 | ret_code = kernel_process_attr_tracker_set_tracking_policy( | |
1675 | session->kernel_session, process_attr, policy); | |
1676 | break; | |
1677 | case LTTNG_DOMAIN_UST: | |
1678 | if (!session->ust_session) { | |
1679 | ret_code = LTTNG_ERR_INVALID; | |
1680 | goto end; | |
1681 | } | |
1682 | ret_code = trace_ust_process_attr_tracker_set_tracking_policy( | |
1683 | session->ust_session, process_attr, policy); | |
1684 | break; | |
1685 | default: | |
1686 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1687 | break; | |
1688 | } | |
1689 | end: | |
1690 | return ret_code; | |
1691 | } | |
1692 | ||
1693 | enum lttng_error_code cmd_process_attr_tracker_inclusion_set_add_value( | |
1694 | struct ltt_session *session, | |
1695 | enum lttng_domain_type domain, | |
1696 | enum lttng_process_attr process_attr, | |
1697 | const struct process_attr_value *value) | |
1698 | { | |
1699 | enum lttng_error_code ret_code = LTTNG_OK; | |
1700 | ||
1701 | switch (domain) { | |
1702 | case LTTNG_DOMAIN_KERNEL: | |
1703 | if (!session->kernel_session) { | |
1704 | ret_code = LTTNG_ERR_INVALID; | |
1705 | goto end; | |
1706 | } | |
1707 | ret_code = kernel_process_attr_tracker_inclusion_set_add_value( | |
1708 | session->kernel_session, process_attr, value); | |
1709 | break; | |
1710 | case LTTNG_DOMAIN_UST: | |
1711 | if (!session->ust_session) { | |
1712 | ret_code = LTTNG_ERR_INVALID; | |
1713 | goto end; | |
1714 | } | |
1715 | ret_code = trace_ust_process_attr_tracker_inclusion_set_add_value( | |
1716 | session->ust_session, process_attr, value); | |
1717 | break; | |
1718 | default: | |
1719 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1720 | break; | |
1721 | } | |
1722 | end: | |
1723 | return ret_code; | |
1724 | } | |
1725 | ||
1726 | enum lttng_error_code cmd_process_attr_tracker_inclusion_set_remove_value( | |
1727 | struct ltt_session *session, | |
1728 | enum lttng_domain_type domain, | |
1729 | enum lttng_process_attr process_attr, | |
1730 | const struct process_attr_value *value) | |
1731 | { | |
1732 | enum lttng_error_code ret_code = LTTNG_OK; | |
1733 | ||
1734 | switch (domain) { | |
1735 | case LTTNG_DOMAIN_KERNEL: | |
1736 | if (!session->kernel_session) { | |
1737 | ret_code = LTTNG_ERR_INVALID; | |
1738 | goto end; | |
1739 | } | |
1740 | ret_code = kernel_process_attr_tracker_inclusion_set_remove_value( | |
1741 | session->kernel_session, process_attr, value); | |
1742 | break; | |
1743 | case LTTNG_DOMAIN_UST: | |
1744 | if (!session->ust_session) { | |
1745 | ret_code = LTTNG_ERR_INVALID; | |
1746 | goto end; | |
1747 | } | |
1748 | ret_code = trace_ust_process_attr_tracker_inclusion_set_remove_value( | |
1749 | session->ust_session, process_attr, value); | |
1750 | break; | |
1751 | default: | |
1752 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1753 | break; | |
1754 | } | |
1755 | end: | |
1756 | return ret_code; | |
1757 | } | |
1758 | ||
1759 | enum lttng_error_code cmd_process_attr_tracker_get_inclusion_set( | |
1760 | struct ltt_session *session, | |
1761 | enum lttng_domain_type domain, | |
1762 | enum lttng_process_attr process_attr, | |
1763 | struct lttng_process_attr_values **values) | |
1764 | { | |
1765 | enum lttng_error_code ret_code = LTTNG_OK; | |
1766 | const struct process_attr_tracker *tracker; | |
1767 | enum process_attr_tracker_status status; | |
1768 | ||
1769 | switch (domain) { | |
1770 | case LTTNG_DOMAIN_KERNEL: | |
1771 | if (!session->kernel_session) { | |
1772 | ret_code = LTTNG_ERR_INVALID; | |
1773 | goto end; | |
1774 | } | |
1775 | tracker = kernel_get_process_attr_tracker( | |
1776 | session->kernel_session, process_attr); | |
1777 | break; | |
1778 | case LTTNG_DOMAIN_UST: | |
1779 | if (!session->ust_session) { | |
1780 | ret_code = LTTNG_ERR_INVALID; | |
1781 | goto end; | |
1782 | } | |
1783 | tracker = trace_ust_get_process_attr_tracker( | |
1784 | session->ust_session, process_attr); | |
1785 | break; | |
1786 | default: | |
1787 | ret_code = LTTNG_ERR_UNSUPPORTED_DOMAIN; | |
1788 | goto end; | |
1789 | } | |
1790 | ||
1791 | if (!tracker) { | |
1792 | ret_code = LTTNG_ERR_INVALID; | |
1793 | goto end; | |
1794 | } | |
1795 | ||
1796 | status = process_attr_tracker_get_inclusion_set(tracker, values); | |
1797 | switch (status) { | |
1798 | case PROCESS_ATTR_TRACKER_STATUS_OK: | |
1799 | ret_code = LTTNG_OK; | |
1800 | break; | |
1801 | case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY: | |
1802 | ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY; | |
1803 | break; | |
1804 | case PROCESS_ATTR_TRACKER_STATUS_ERROR: | |
1805 | ret_code = LTTNG_ERR_NOMEM; | |
1806 | break; | |
1807 | default: | |
1808 | ret_code = LTTNG_ERR_UNK; | |
1809 | break; | |
1810 | } | |
1811 | ||
1812 | end: | |
1813 | return ret_code; | |
1814 | } | |
1815 | ||
2f77fc4b DG |
1816 | /* |
1817 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1818 | */ | |
56a37563 | 1819 | int cmd_disable_event(struct ltt_session *session, |
df4f5a87 JG |
1820 | enum lttng_domain_type domain, const char *channel_name, |
1821 | const struct lttng_event *event) | |
2f77fc4b DG |
1822 | { |
1823 | int ret; | |
df4f5a87 | 1824 | const char *event_name; |
6e911cad | 1825 | |
18a720cd MD |
1826 | DBG("Disable event command for event \'%s\'", event->name); |
1827 | ||
6e911cad MD |
1828 | event_name = event->name; |
1829 | ||
9b7431cf JG |
1830 | /* Error out on unhandled search criteria */ |
1831 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad | 1832 | || event->pid || event->filter || event->exclusion) { |
7076b56e JG |
1833 | ret = LTTNG_ERR_UNK; |
1834 | goto error; | |
6e911cad | 1835 | } |
2f77fc4b | 1836 | |
2223c96f DG |
1837 | rcu_read_lock(); |
1838 | ||
2f77fc4b DG |
1839 | switch (domain) { |
1840 | case LTTNG_DOMAIN_KERNEL: | |
1841 | { | |
1842 | struct ltt_kernel_channel *kchan; | |
1843 | struct ltt_kernel_session *ksess; | |
1844 | ||
1845 | ksess = session->kernel_session; | |
1846 | ||
85076754 MD |
1847 | /* |
1848 | * If a non-default channel has been created in the | |
1849 | * session, explicitely require that -c chan_name needs | |
1850 | * to be provided. | |
1851 | */ | |
1852 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1853 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1854 | goto error_unlock; |
85076754 MD |
1855 | } |
1856 | ||
2f77fc4b DG |
1857 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1858 | if (kchan == NULL) { | |
f73fabfd | 1859 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
7076b56e | 1860 | goto error_unlock; |
2f77fc4b DG |
1861 | } |
1862 | ||
6e911cad MD |
1863 | switch (event->type) { |
1864 | case LTTNG_EVENT_ALL: | |
9550ee81 | 1865 | case LTTNG_EVENT_TRACEPOINT: |
d0ae4ea8 | 1866 | case LTTNG_EVENT_SYSCALL: |
9550ee81 JR |
1867 | case LTTNG_EVENT_PROBE: |
1868 | case LTTNG_EVENT_FUNCTION: | |
1869 | case LTTNG_EVENT_FUNCTION_ENTRY:/* fall-through */ | |
1870 | if (event_name[0] == '\0') { | |
1871 | ret = event_kernel_disable_event(kchan, | |
1872 | NULL, event->type); | |
29c62722 | 1873 | } else { |
d0ae4ea8 | 1874 | ret = event_kernel_disable_event(kchan, |
9550ee81 | 1875 | event_name, event->type); |
29c62722 | 1876 | } |
6e911cad | 1877 | if (ret != LTTNG_OK) { |
7076b56e | 1878 | goto error_unlock; |
6e911cad MD |
1879 | } |
1880 | break; | |
6e911cad MD |
1881 | default: |
1882 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1883 | goto error_unlock; |
2f77fc4b DG |
1884 | } |
1885 | ||
7d268848 | 1886 | kernel_wait_quiescent(); |
2f77fc4b DG |
1887 | break; |
1888 | } | |
1889 | case LTTNG_DOMAIN_UST: | |
1890 | { | |
1891 | struct ltt_ust_channel *uchan; | |
1892 | struct ltt_ust_session *usess; | |
1893 | ||
1894 | usess = session->ust_session; | |
1895 | ||
7076b56e JG |
1896 | if (validate_ust_event_name(event_name)) { |
1897 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1898 | goto error_unlock; | |
1899 | } | |
1900 | ||
85076754 MD |
1901 | /* |
1902 | * If a non-default channel has been created in the | |
9550ee81 | 1903 | * session, explicitly require that -c chan_name needs |
85076754 MD |
1904 | * to be provided. |
1905 | */ | |
1906 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1907 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
7076b56e | 1908 | goto error_unlock; |
85076754 MD |
1909 | } |
1910 | ||
2f77fc4b DG |
1911 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1912 | channel_name); | |
1913 | if (uchan == NULL) { | |
f73fabfd | 1914 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
7076b56e | 1915 | goto error_unlock; |
2f77fc4b DG |
1916 | } |
1917 | ||
6e911cad MD |
1918 | switch (event->type) { |
1919 | case LTTNG_EVENT_ALL: | |
b3639870 JR |
1920 | /* |
1921 | * An empty event name means that everything | |
1922 | * should be disabled. | |
1923 | */ | |
1924 | if (event->name[0] == '\0') { | |
1925 | ret = event_ust_disable_all_tracepoints(usess, uchan); | |
77d536b2 JR |
1926 | } else { |
1927 | ret = event_ust_disable_tracepoint(usess, uchan, | |
1928 | event_name); | |
1929 | } | |
6e911cad | 1930 | if (ret != LTTNG_OK) { |
7076b56e | 1931 | goto error_unlock; |
6e911cad MD |
1932 | } |
1933 | break; | |
1934 | default: | |
1935 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1936 | goto error_unlock; |
2f77fc4b DG |
1937 | } |
1938 | ||
1939 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1940 | channel_name); | |
1941 | break; | |
1942 | } | |
5cdb6027 | 1943 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1944 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1945 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1946 | { |
fefd409b | 1947 | struct agent *agt; |
f20baf8e DG |
1948 | struct ltt_ust_session *usess = session->ust_session; |
1949 | ||
1950 | assert(usess); | |
1951 | ||
6e911cad MD |
1952 | switch (event->type) { |
1953 | case LTTNG_EVENT_ALL: | |
1954 | break; | |
1955 | default: | |
1956 | ret = LTTNG_ERR_UNK; | |
7076b56e | 1957 | goto error_unlock; |
6e911cad MD |
1958 | } |
1959 | ||
5cdb6027 | 1960 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1961 | if (!agt) { |
1962 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
7076b56e | 1963 | goto error_unlock; |
fefd409b | 1964 | } |
b3639870 JR |
1965 | /* |
1966 | * An empty event name means that everything | |
1967 | * should be disabled. | |
1968 | */ | |
1969 | if (event->name[0] == '\0') { | |
18a720cd MD |
1970 | ret = event_agent_disable_all(usess, agt); |
1971 | } else { | |
1972 | ret = event_agent_disable(usess, agt, event_name); | |
1973 | } | |
f20baf8e | 1974 | if (ret != LTTNG_OK) { |
7076b56e | 1975 | goto error_unlock; |
f20baf8e DG |
1976 | } |
1977 | ||
1978 | break; | |
1979 | } | |
2f77fc4b | 1980 | default: |
f73fabfd | 1981 | ret = LTTNG_ERR_UND; |
7076b56e | 1982 | goto error_unlock; |
2f77fc4b DG |
1983 | } |
1984 | ||
f73fabfd | 1985 | ret = LTTNG_OK; |
2f77fc4b | 1986 | |
7076b56e | 1987 | error_unlock: |
2223c96f | 1988 | rcu_read_unlock(); |
7076b56e | 1989 | error: |
2f77fc4b DG |
1990 | return ret; |
1991 | } | |
1992 | ||
2f77fc4b DG |
1993 | /* |
1994 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1995 | */ | |
56a37563 | 1996 | int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain, |
df4f5a87 | 1997 | char *channel_name, const struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1998 | { |
d5979e4a | 1999 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
bdf64013 JG |
2000 | char *app_ctx_provider_name = NULL, *app_ctx_name = NULL; |
2001 | ||
9a699f7b JR |
2002 | /* |
2003 | * Don't try to add a context if the session has been started at | |
2004 | * some point in time before. The tracer does not allow it and would | |
2005 | * result in a corrupted trace. | |
2006 | */ | |
2007 | if (session->has_been_started) { | |
2008 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2009 | goto end; | |
2010 | } | |
2011 | ||
bdf64013 JG |
2012 | if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
2013 | app_ctx_provider_name = ctx->u.app_ctx.provider_name; | |
2014 | app_ctx_name = ctx->u.app_ctx.ctx_name; | |
2015 | } | |
2f77fc4b DG |
2016 | |
2017 | switch (domain) { | |
2018 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
2019 | assert(session->kernel_session); |
2020 | ||
2021 | if (session->kernel_session->channel_count == 0) { | |
2022 | /* Create default channel */ | |
2023 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
2024 | if (ret != LTTNG_OK) { | |
2025 | goto error; | |
2026 | } | |
d5979e4a | 2027 | chan_kern_created = 1; |
979e618e | 2028 | } |
2f77fc4b | 2029 | /* Add kernel context to kernel tracer */ |
601d5acf | 2030 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 2031 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2032 | goto error; |
2033 | } | |
2034 | break; | |
bdf64013 JG |
2035 | case LTTNG_DOMAIN_JUL: |
2036 | case LTTNG_DOMAIN_LOG4J: | |
2037 | { | |
2038 | /* | |
2039 | * Validate channel name. | |
2040 | * If no channel name is given and the domain is JUL or LOG4J, | |
2041 | * set it to the appropriate domain-specific channel name. If | |
2042 | * a name is provided but does not match the expexted channel | |
2043 | * name, return an error. | |
2044 | */ | |
2045 | if (domain == LTTNG_DOMAIN_JUL && *channel_name && | |
2046 | strcmp(channel_name, | |
2047 | DEFAULT_JUL_CHANNEL_NAME)) { | |
2048 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2049 | goto error; | |
2050 | } else if (domain == LTTNG_DOMAIN_LOG4J && *channel_name && | |
2051 | strcmp(channel_name, | |
2052 | DEFAULT_LOG4J_CHANNEL_NAME)) { | |
2053 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2054 | goto error; | |
2055 | } | |
a93b3916 | 2056 | /* break is _not_ missing here. */ |
bdf64013 | 2057 | } |
2f77fc4b DG |
2058 | case LTTNG_DOMAIN_UST: |
2059 | { | |
2060 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
2061 | unsigned int chan_count; |
2062 | ||
2f77fc4b DG |
2063 | assert(usess); |
2064 | ||
85076754 | 2065 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
2066 | if (chan_count == 0) { |
2067 | struct lttng_channel *attr; | |
2068 | /* Create default channel */ | |
0a9c6494 | 2069 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
2070 | if (attr == NULL) { |
2071 | ret = LTTNG_ERR_FATAL; | |
2072 | goto error; | |
2073 | } | |
2074 | ||
7972aab2 | 2075 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
2076 | if (ret != LTTNG_OK) { |
2077 | free(attr); | |
2078 | goto error; | |
2079 | } | |
cf0bcb51 | 2080 | channel_attr_destroy(attr); |
d5979e4a | 2081 | chan_ust_created = 1; |
979e618e DG |
2082 | } |
2083 | ||
601d5acf | 2084 | ret = context_ust_add(usess, domain, ctx, channel_name); |
bdf64013 JG |
2085 | free(app_ctx_provider_name); |
2086 | free(app_ctx_name); | |
2087 | app_ctx_name = NULL; | |
2088 | app_ctx_provider_name = NULL; | |
f73fabfd | 2089 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2090 | goto error; |
2091 | } | |
2092 | break; | |
2093 | } | |
2f77fc4b | 2094 | default: |
f73fabfd | 2095 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2096 | goto error; |
2097 | } | |
2098 | ||
bdf64013 JG |
2099 | ret = LTTNG_OK; |
2100 | goto end; | |
2f77fc4b DG |
2101 | |
2102 | error: | |
d5979e4a DG |
2103 | if (chan_kern_created) { |
2104 | struct ltt_kernel_channel *kchan = | |
2105 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
2106 | session->kernel_session); | |
2107 | /* Created previously, this should NOT fail. */ | |
2108 | assert(kchan); | |
2109 | kernel_destroy_channel(kchan); | |
2110 | } | |
2111 | ||
2112 | if (chan_ust_created) { | |
2113 | struct ltt_ust_channel *uchan = | |
2114 | trace_ust_find_channel_by_name( | |
2115 | session->ust_session->domain_global.channels, | |
2116 | DEFAULT_CHANNEL_NAME); | |
2117 | /* Created previously, this should NOT fail. */ | |
2118 | assert(uchan); | |
2119 | /* Remove from the channel list of the session. */ | |
2120 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
2121 | uchan); | |
2122 | trace_ust_destroy_channel(uchan); | |
2123 | } | |
bdf64013 JG |
2124 | end: |
2125 | free(app_ctx_provider_name); | |
2126 | free(app_ctx_name); | |
2f77fc4b DG |
2127 | return ret; |
2128 | } | |
2129 | ||
dac8e046 JG |
2130 | static inline bool name_starts_with(const char *name, const char *prefix) |
2131 | { | |
2132 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
2133 | ||
2134 | return !strncmp(name, prefix, max_cmp_len); | |
2135 | } | |
2136 | ||
2137 | /* Perform userspace-specific event name validation */ | |
2138 | static int validate_ust_event_name(const char *name) | |
2139 | { | |
2140 | int ret = 0; | |
2141 | ||
2142 | if (!name) { | |
2143 | ret = -1; | |
2144 | goto end; | |
2145 | } | |
2146 | ||
2147 | /* | |
2148 | * Check name against all internal UST event component namespaces used | |
2149 | * by the agents. | |
2150 | */ | |
2151 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
2152 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
2153 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
2154 | ret = -1; | |
2155 | } | |
2156 | ||
2157 | end: | |
2158 | return ret; | |
2159 | } | |
88f06f15 | 2160 | |
2f77fc4b | 2161 | /* |
88f06f15 JG |
2162 | * Internal version of cmd_enable_event() with a supplemental |
2163 | * "internal_event" flag which is used to enable internal events which should | |
2164 | * be hidden from clients. Such events are used in the agent implementation to | |
2165 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 2166 | */ |
88f06f15 | 2167 | static int _cmd_enable_event(struct ltt_session *session, |
df4f5a87 | 2168 | const struct lttng_domain *domain, |
025faf73 | 2169 | char *channel_name, struct lttng_event *event, |
6b453b5e | 2170 | char *filter_expression, |
db8f1377 JI |
2171 | struct lttng_filter_bytecode *filter, |
2172 | struct lttng_event_exclusion *exclusion, | |
88f06f15 | 2173 | int wpipe, bool internal_event) |
2f77fc4b | 2174 | { |
9f449915 | 2175 | int ret = 0, channel_created = 0; |
cfedea03 | 2176 | struct lttng_channel *attr = NULL; |
2f77fc4b DG |
2177 | |
2178 | assert(session); | |
2179 | assert(event); | |
2180 | assert(channel_name); | |
2181 | ||
2a385866 JG |
2182 | /* If we have a filter, we must have its filter expression */ |
2183 | assert(!(!!filter_expression ^ !!filter)); | |
2184 | ||
9f449915 PP |
2185 | /* Normalize event name as a globbing pattern */ |
2186 | strutils_normalize_star_glob_pattern(event->name); | |
18a720cd | 2187 | |
9f449915 PP |
2188 | /* Normalize exclusion names as globbing patterns */ |
2189 | if (exclusion) { | |
2190 | size_t i; | |
f5ac4bd7 | 2191 | |
9f449915 PP |
2192 | for (i = 0; i < exclusion->count; i++) { |
2193 | char *name = LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
2194 | ||
2195 | strutils_normalize_star_glob_pattern(name); | |
2196 | } | |
930a2e99 JG |
2197 | } |
2198 | ||
9f449915 PP |
2199 | DBG("Enable event command for event \'%s\'", event->name); |
2200 | ||
2201 | rcu_read_lock(); | |
2202 | ||
7972aab2 | 2203 | switch (domain->type) { |
2f77fc4b DG |
2204 | case LTTNG_DOMAIN_KERNEL: |
2205 | { | |
2206 | struct ltt_kernel_channel *kchan; | |
2207 | ||
85076754 MD |
2208 | /* |
2209 | * If a non-default channel has been created in the | |
2210 | * session, explicitely require that -c chan_name needs | |
2211 | * to be provided. | |
2212 | */ | |
2213 | if (session->kernel_session->has_non_default_channel | |
2214 | && channel_name[0] == '\0') { | |
2215 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2216 | goto error; | |
2217 | } | |
2218 | ||
2f77fc4b DG |
2219 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2220 | session->kernel_session); | |
2221 | if (kchan == NULL) { | |
0a9c6494 DG |
2222 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
2223 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 2224 | if (attr == NULL) { |
f73fabfd | 2225 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2226 | goto error; |
2227 | } | |
04c17253 MD |
2228 | if (lttng_strncpy(attr->name, channel_name, |
2229 | sizeof(attr->name))) { | |
2230 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2231 | goto error; |
2232 | } | |
2f77fc4b DG |
2233 | |
2234 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2235 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2236 | goto error; |
2237 | } | |
e5f5db7f | 2238 | channel_created = 1; |
2f77fc4b DG |
2239 | } |
2240 | ||
2241 | /* Get the newly created kernel channel pointer */ | |
2242 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2243 | session->kernel_session); | |
2244 | if (kchan == NULL) { | |
2245 | /* This sould not happen... */ | |
f73fabfd | 2246 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2247 | goto error; |
2248 | } | |
2249 | ||
6e911cad MD |
2250 | switch (event->type) { |
2251 | case LTTNG_EVENT_ALL: | |
29c62722 | 2252 | { |
00a62084 MD |
2253 | char *filter_expression_a = NULL; |
2254 | struct lttng_filter_bytecode *filter_a = NULL; | |
2255 | ||
2256 | /* | |
2257 | * We need to duplicate filter_expression and filter, | |
2258 | * because ownership is passed to first enable | |
2259 | * event. | |
2260 | */ | |
2261 | if (filter_expression) { | |
2262 | filter_expression_a = strdup(filter_expression); | |
2263 | if (!filter_expression_a) { | |
2264 | ret = LTTNG_ERR_FATAL; | |
2265 | goto error; | |
2266 | } | |
2267 | } | |
2268 | if (filter) { | |
2269 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
2270 | if (!filter_a) { | |
2271 | free(filter_expression_a); | |
2272 | ret = LTTNG_ERR_FATAL; | |
2273 | goto error; | |
2274 | } | |
2275 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
2276 | } | |
29c62722 | 2277 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
2278 | ret = event_kernel_enable_event(kchan, event, |
2279 | filter_expression, filter); | |
a969e101 MD |
2280 | /* We have passed ownership */ |
2281 | filter_expression = NULL; | |
2282 | filter = NULL; | |
29c62722 MD |
2283 | if (ret != LTTNG_OK) { |
2284 | if (channel_created) { | |
2285 | /* Let's not leak a useless channel. */ | |
2286 | kernel_destroy_channel(kchan); | |
2287 | } | |
00a62084 MD |
2288 | free(filter_expression_a); |
2289 | free(filter_a); | |
29c62722 MD |
2290 | goto error; |
2291 | } | |
2292 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
2293 | ret = event_kernel_enable_event(kchan, event, |
2294 | filter_expression_a, filter_a); | |
60d21fa2 AB |
2295 | /* We have passed ownership */ |
2296 | filter_expression_a = NULL; | |
2297 | filter_a = NULL; | |
29c62722 MD |
2298 | if (ret != LTTNG_OK) { |
2299 | goto error; | |
2300 | } | |
2301 | break; | |
2302 | } | |
6e6ef3d7 | 2303 | case LTTNG_EVENT_PROBE: |
dcabc190 | 2304 | case LTTNG_EVENT_USERSPACE_PROBE: |
6e6ef3d7 DG |
2305 | case LTTNG_EVENT_FUNCTION: |
2306 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 2307 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
2308 | ret = event_kernel_enable_event(kchan, event, |
2309 | filter_expression, filter); | |
a969e101 MD |
2310 | /* We have passed ownership */ |
2311 | filter_expression = NULL; | |
2312 | filter = NULL; | |
6e911cad MD |
2313 | if (ret != LTTNG_OK) { |
2314 | if (channel_created) { | |
2315 | /* Let's not leak a useless channel. */ | |
2316 | kernel_destroy_channel(kchan); | |
2317 | } | |
2318 | goto error; | |
e5f5db7f | 2319 | } |
6e911cad MD |
2320 | break; |
2321 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
2322 | ret = event_kernel_enable_event(kchan, event, |
2323 | filter_expression, filter); | |
a969e101 MD |
2324 | /* We have passed ownership */ |
2325 | filter_expression = NULL; | |
2326 | filter = NULL; | |
e2b957af MD |
2327 | if (ret != LTTNG_OK) { |
2328 | goto error; | |
2329 | } | |
6e911cad MD |
2330 | break; |
2331 | default: | |
2332 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
2333 | goto error; |
2334 | } | |
2335 | ||
7d268848 | 2336 | kernel_wait_quiescent(); |
2f77fc4b DG |
2337 | break; |
2338 | } | |
2339 | case LTTNG_DOMAIN_UST: | |
2340 | { | |
2341 | struct ltt_ust_channel *uchan; | |
2342 | struct ltt_ust_session *usess = session->ust_session; | |
2343 | ||
2344 | assert(usess); | |
2345 | ||
85076754 MD |
2346 | /* |
2347 | * If a non-default channel has been created in the | |
2348 | * session, explicitely require that -c chan_name needs | |
2349 | * to be provided. | |
2350 | */ | |
2351 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
2352 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
2353 | goto error; | |
2354 | } | |
2355 | ||
2f77fc4b DG |
2356 | /* Get channel from global UST domain */ |
2357 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2358 | channel_name); | |
2359 | if (uchan == NULL) { | |
2360 | /* Create default channel */ | |
0a9c6494 DG |
2361 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
2362 | usess->buffer_type); | |
2f77fc4b | 2363 | if (attr == NULL) { |
f73fabfd | 2364 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2365 | goto error; |
2366 | } | |
04c17253 MD |
2367 | if (lttng_strncpy(attr->name, channel_name, |
2368 | sizeof(attr->name))) { | |
2369 | ret = LTTNG_ERR_INVALID; | |
04c17253 MD |
2370 | goto error; |
2371 | } | |
2f77fc4b DG |
2372 | |
2373 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 2374 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2375 | goto error; |
2376 | } | |
2f77fc4b DG |
2377 | |
2378 | /* Get the newly created channel reference back */ | |
2379 | uchan = trace_ust_find_channel_by_name( | |
2380 | usess->domain_global.channels, channel_name); | |
2381 | assert(uchan); | |
2382 | } | |
2383 | ||
141feb8c JG |
2384 | if (uchan->domain != LTTNG_DOMAIN_UST && !internal_event) { |
2385 | /* | |
2386 | * Don't allow users to add UST events to channels which | |
2387 | * are assigned to a userspace subdomain (JUL, Log4J, | |
2388 | * Python, etc.). | |
2389 | */ | |
2390 | ret = LTTNG_ERR_INVALID_CHANNEL_DOMAIN; | |
2391 | goto error; | |
2392 | } | |
2393 | ||
dac8e046 JG |
2394 | if (!internal_event) { |
2395 | /* | |
2396 | * Ensure the event name is not reserved for internal | |
2397 | * use. | |
2398 | */ | |
2399 | ret = validate_ust_event_name(event->name); | |
2400 | if (ret) { | |
2401 | WARN("Userspace event name %s failed validation.", | |
bbcab087 | 2402 | event->name); |
dac8e046 JG |
2403 | ret = LTTNG_ERR_INVALID_EVENT_NAME; |
2404 | goto error; | |
2405 | } | |
2406 | } | |
2407 | ||
2f77fc4b | 2408 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 2409 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
88f06f15 JG |
2410 | filter_expression, filter, exclusion, |
2411 | internal_event); | |
49d21f93 MD |
2412 | /* We have passed ownership */ |
2413 | filter_expression = NULL; | |
2414 | filter = NULL; | |
2415 | exclusion = NULL; | |
94382e15 JG |
2416 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2417 | goto already_enabled; | |
2418 | } else if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2419 | goto error; |
2420 | } | |
2421 | break; | |
2422 | } | |
5cdb6027 | 2423 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 2424 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2425 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 2426 | { |
da6c3a50 | 2427 | const char *default_event_name, *default_chan_name; |
fefd409b | 2428 | struct agent *agt; |
f20baf8e DG |
2429 | struct lttng_event uevent; |
2430 | struct lttng_domain tmp_dom; | |
2431 | struct ltt_ust_session *usess = session->ust_session; | |
2432 | ||
2433 | assert(usess); | |
2434 | ||
f28f9e44 JG |
2435 | if (!agent_tracing_is_enabled()) { |
2436 | DBG("Attempted to enable an event in an agent domain but the agent thread is not running"); | |
2437 | ret = LTTNG_ERR_AGENT_TRACING_DISABLED; | |
2438 | goto error; | |
2439 | } | |
2440 | ||
5cdb6027 | 2441 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 2442 | if (!agt) { |
5cdb6027 | 2443 | agt = agent_create(domain->type); |
fefd409b | 2444 | if (!agt) { |
e5b3c48c | 2445 | ret = LTTNG_ERR_NOMEM; |
fefd409b DG |
2446 | goto error; |
2447 | } | |
2448 | agent_add(agt, usess->agents); | |
2449 | } | |
2450 | ||
022d91ba | 2451 | /* Create the default tracepoint. */ |
996de3c7 | 2452 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
2453 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
2454 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
51755dc8 JG |
2455 | default_event_name = event_get_default_agent_ust_name( |
2456 | domain->type); | |
da6c3a50 | 2457 | if (!default_event_name) { |
e5b3c48c | 2458 | ret = LTTNG_ERR_FATAL; |
da6c3a50 | 2459 | goto error; |
f43f95a9 | 2460 | } |
da6c3a50 | 2461 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
2462 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
2463 | ||
2464 | /* | |
2465 | * The domain type is changed because we are about to enable the | |
2466 | * default channel and event for the JUL domain that are hardcoded. | |
2467 | * This happens in the UST domain. | |
2468 | */ | |
2469 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
2470 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
2471 | ||
0e115563 DG |
2472 | switch (domain->type) { |
2473 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 2474 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
2475 | break; |
2476 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 2477 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
2478 | break; |
2479 | case LTTNG_DOMAIN_PYTHON: | |
2480 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
2481 | break; | |
2482 | default: | |
e98a44b0 | 2483 | /* The switch/case we are in makes this impossible */ |
0e115563 | 2484 | assert(0); |
da6c3a50 DG |
2485 | } |
2486 | ||
971da06a | 2487 | { |
8404118c | 2488 | char *filter_expression_copy = NULL; |
51755dc8 | 2489 | struct lttng_filter_bytecode *filter_copy = NULL; |
971da06a JG |
2490 | |
2491 | if (filter) { | |
51755dc8 JG |
2492 | const size_t filter_size = sizeof( |
2493 | struct lttng_filter_bytecode) | |
2494 | + filter->len; | |
2495 | ||
2496 | filter_copy = zmalloc(filter_size); | |
971da06a | 2497 | if (!filter_copy) { |
018096a4 | 2498 | ret = LTTNG_ERR_NOMEM; |
b742e3e2 | 2499 | goto error; |
971da06a | 2500 | } |
51755dc8 | 2501 | memcpy(filter_copy, filter, filter_size); |
971da06a | 2502 | |
8404118c JG |
2503 | filter_expression_copy = |
2504 | strdup(filter_expression); | |
2505 | if (!filter_expression) { | |
2506 | ret = LTTNG_ERR_NOMEM; | |
51755dc8 JG |
2507 | } |
2508 | ||
2509 | if (!filter_expression_copy || !filter_copy) { | |
2510 | free(filter_expression_copy); | |
2511 | free(filter_copy); | |
2512 | goto error; | |
8404118c | 2513 | } |
971da06a JG |
2514 | } |
2515 | ||
88f06f15 | 2516 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a | 2517 | (char *) default_chan_name, |
8404118c JG |
2518 | &uevent, filter_expression_copy, |
2519 | filter_copy, NULL, wpipe); | |
971da06a JG |
2520 | } |
2521 | ||
94382e15 JG |
2522 | if (ret == LTTNG_ERR_UST_EVENT_ENABLED) { |
2523 | goto already_enabled; | |
2524 | } else if (ret != LTTNG_OK) { | |
f20baf8e DG |
2525 | goto error; |
2526 | } | |
2527 | ||
2528 | /* The wild card * means that everything should be enabled. */ | |
2529 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
8404118c JG |
2530 | ret = event_agent_enable_all(usess, agt, event, filter, |
2531 | filter_expression); | |
f20baf8e | 2532 | } else { |
8404118c JG |
2533 | ret = event_agent_enable(usess, agt, event, filter, |
2534 | filter_expression); | |
f20baf8e | 2535 | } |
51755dc8 JG |
2536 | filter = NULL; |
2537 | filter_expression = NULL; | |
f20baf8e DG |
2538 | if (ret != LTTNG_OK) { |
2539 | goto error; | |
2540 | } | |
2541 | ||
2542 | break; | |
2543 | } | |
2f77fc4b | 2544 | default: |
f73fabfd | 2545 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2546 | goto error; |
2547 | } | |
2548 | ||
f73fabfd | 2549 | ret = LTTNG_OK; |
2f77fc4b | 2550 | |
94382e15 | 2551 | already_enabled: |
2f77fc4b | 2552 | error: |
49d21f93 MD |
2553 | free(filter_expression); |
2554 | free(filter); | |
2555 | free(exclusion); | |
cf0bcb51 | 2556 | channel_attr_destroy(attr); |
2223c96f | 2557 | rcu_read_unlock(); |
2f77fc4b DG |
2558 | return ret; |
2559 | } | |
2560 | ||
88f06f15 JG |
2561 | /* |
2562 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2563 | * We own filter, exclusion, and filter_expression. | |
2564 | */ | |
df4f5a87 JG |
2565 | int cmd_enable_event(struct ltt_session *session, |
2566 | const struct lttng_domain *domain, | |
88f06f15 JG |
2567 | char *channel_name, struct lttng_event *event, |
2568 | char *filter_expression, | |
2569 | struct lttng_filter_bytecode *filter, | |
2570 | struct lttng_event_exclusion *exclusion, | |
2571 | int wpipe) | |
2572 | { | |
2573 | return _cmd_enable_event(session, domain, channel_name, event, | |
2574 | filter_expression, filter, exclusion, wpipe, false); | |
2575 | } | |
2576 | ||
2577 | /* | |
2578 | * Enable an event which is internal to LTTng. An internal should | |
2579 | * never be made visible to clients and are immune to checks such as | |
2580 | * reserved names. | |
2581 | */ | |
2582 | static int cmd_enable_event_internal(struct ltt_session *session, | |
df4f5a87 | 2583 | const struct lttng_domain *domain, |
88f06f15 JG |
2584 | char *channel_name, struct lttng_event *event, |
2585 | char *filter_expression, | |
2586 | struct lttng_filter_bytecode *filter, | |
2587 | struct lttng_event_exclusion *exclusion, | |
2588 | int wpipe) | |
2589 | { | |
2590 | return _cmd_enable_event(session, domain, channel_name, event, | |
2591 | filter_expression, filter, exclusion, wpipe, true); | |
2592 | } | |
2593 | ||
2f77fc4b DG |
2594 | /* |
2595 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2596 | */ | |
56a37563 JG |
2597 | ssize_t cmd_list_tracepoints(enum lttng_domain_type domain, |
2598 | struct lttng_event **events) | |
2f77fc4b DG |
2599 | { |
2600 | int ret; | |
2601 | ssize_t nb_events = 0; | |
2602 | ||
2603 | switch (domain) { | |
2604 | case LTTNG_DOMAIN_KERNEL: | |
7d268848 | 2605 | nb_events = kernel_list_events(events); |
2f77fc4b | 2606 | if (nb_events < 0) { |
f73fabfd | 2607 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
2608 | goto error; |
2609 | } | |
2610 | break; | |
2611 | case LTTNG_DOMAIN_UST: | |
2612 | nb_events = ust_app_list_events(events); | |
2613 | if (nb_events < 0) { | |
f73fabfd | 2614 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2615 | goto error; |
2616 | } | |
2617 | break; | |
5cdb6027 | 2618 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2619 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2620 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 2621 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
2622 | if (nb_events < 0) { |
2623 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
2624 | goto error; | |
2625 | } | |
2626 | break; | |
2f77fc4b | 2627 | default: |
f73fabfd | 2628 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2629 | goto error; |
2630 | } | |
2631 | ||
2632 | return nb_events; | |
2633 | ||
2634 | error: | |
2635 | /* Return negative value to differentiate return code */ | |
2636 | return -ret; | |
2637 | } | |
2638 | ||
2639 | /* | |
2640 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2641 | */ | |
56a37563 | 2642 | ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain, |
2f77fc4b DG |
2643 | struct lttng_event_field **fields) |
2644 | { | |
2645 | int ret; | |
2646 | ssize_t nb_fields = 0; | |
2647 | ||
2648 | switch (domain) { | |
2649 | case LTTNG_DOMAIN_UST: | |
2650 | nb_fields = ust_app_list_event_fields(fields); | |
2651 | if (nb_fields < 0) { | |
f73fabfd | 2652 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
2653 | goto error; |
2654 | } | |
2655 | break; | |
2656 | case LTTNG_DOMAIN_KERNEL: | |
2657 | default: /* fall-through */ | |
f73fabfd | 2658 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2659 | goto error; |
2660 | } | |
2661 | ||
2662 | return nb_fields; | |
2663 | ||
2664 | error: | |
2665 | /* Return negative value to differentiate return code */ | |
2666 | return -ret; | |
2667 | } | |
2668 | ||
834978fd DG |
2669 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
2670 | { | |
2671 | return syscall_table_list(events); | |
2672 | } | |
2673 | ||
2f77fc4b DG |
2674 | /* |
2675 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
2676 | * |
2677 | * Called with session mutex held. | |
2f77fc4b DG |
2678 | */ |
2679 | int cmd_start_trace(struct ltt_session *session) | |
2680 | { | |
82b69413 | 2681 | enum lttng_error_code ret; |
cde3e505 | 2682 | unsigned long nb_chan = 0; |
2f77fc4b DG |
2683 | struct ltt_kernel_session *ksession; |
2684 | struct ltt_ust_session *usess; | |
1f496244 JG |
2685 | const bool session_rotated_after_last_stop = |
2686 | session->rotated_after_last_stop; | |
b02f5986 MD |
2687 | const bool session_cleared_after_last_stop = |
2688 | session->cleared_after_last_stop; | |
2f77fc4b DG |
2689 | |
2690 | assert(session); | |
2691 | ||
2692 | /* Ease our life a bit ;) */ | |
2693 | ksession = session->kernel_session; | |
2694 | usess = session->ust_session; | |
2695 | ||
8382cf6f DG |
2696 | /* Is the session already started? */ |
2697 | if (session->active) { | |
f73fabfd | 2698 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
7a24ece3 JR |
2699 | /* Perform nothing */ |
2700 | goto end; | |
2f77fc4b DG |
2701 | } |
2702 | ||
1f496244 JG |
2703 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING && |
2704 | !session->current_trace_chunk) { | |
2705 | /* | |
2706 | * A rotation was launched while the session was stopped and | |
2707 | * it has not been completed yet. It is not possible to start | |
2708 | * the session since starting the session here would require a | |
2709 | * rotation from "NULL" to a new trace chunk. That rotation | |
2710 | * would overlap with the ongoing rotation, which is not | |
2711 | * supported. | |
2712 | */ | |
2713 | WARN("Refusing to start session \"%s\" as a rotation launched after the last \"stop\" is still ongoing", | |
2714 | session->name); | |
2715 | ret = LTTNG_ERR_ROTATION_PENDING; | |
2716 | goto error; | |
2717 | } | |
2718 | ||
cde3e505 DG |
2719 | /* |
2720 | * Starting a session without channel is useless since after that it's not | |
2721 | * possible to enable channel thus inform the client. | |
2722 | */ | |
2723 | if (usess && usess->domain_global.channels) { | |
2724 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
2725 | } | |
2726 | if (ksession) { | |
2727 | nb_chan += ksession->channel_count; | |
2728 | } | |
2729 | if (!nb_chan) { | |
2730 | ret = LTTNG_ERR_NO_CHANNEL; | |
2731 | goto error; | |
2732 | } | |
2733 | ||
1f496244 JG |
2734 | session->active = 1; |
2735 | session->rotated_after_last_stop = false; | |
b02f5986 | 2736 | session->cleared_after_last_stop = false; |
070b6a86 | 2737 | if (session->output_traces && !session->current_trace_chunk) { |
1f496244 JG |
2738 | if (!session->has_been_started) { |
2739 | struct lttng_trace_chunk *trace_chunk; | |
2740 | ||
2741 | DBG("Creating initial trace chunk of session \"%s\"", | |
2742 | session->name); | |
2743 | trace_chunk = session_create_new_trace_chunk( | |
2744 | session, NULL, NULL, NULL); | |
2745 | if (!trace_chunk) { | |
2746 | ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
2747 | goto error; | |
2748 | } | |
2749 | assert(!session->current_trace_chunk); | |
2750 | ret = session_set_trace_chunk(session, trace_chunk, | |
2751 | NULL); | |
2752 | lttng_trace_chunk_put(trace_chunk); | |
2753 | if (ret) { | |
2754 | ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
2755 | goto error; | |
2756 | } | |
2757 | } else { | |
2758 | DBG("Rotating session \"%s\" from its current \"NULL\" trace chunk to a new chunk", | |
2759 | session->name); | |
2760 | /* | |
2761 | * Rotate existing streams into the new chunk. | |
2762 | * This is a "quiet" rotation has no client has | |
2763 | * explicitly requested this operation. | |
2764 | * | |
2765 | * There is also no need to wait for the rotation | |
2766 | * to complete as it will happen immediately. No data | |
2767 | * was produced as the session was stopped, so the | |
2768 | * rotation should happen on reception of the command. | |
2769 | */ | |
343defc2 MD |
2770 | ret = cmd_rotate_session(session, NULL, true, |
2771 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
1f496244 JG |
2772 | if (ret != LTTNG_OK) { |
2773 | goto error; | |
2774 | } | |
5c408ad8 | 2775 | } |
c996624c JD |
2776 | } |
2777 | ||
2f77fc4b DG |
2778 | /* Kernel tracing */ |
2779 | if (ksession != NULL) { | |
c996624c | 2780 | DBG("Start kernel tracing session %s", session->name); |
7d268848 | 2781 | ret = start_kernel_session(ksession); |
9b6c7ec5 | 2782 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2783 | goto error; |
2784 | } | |
2f77fc4b DG |
2785 | } |
2786 | ||
2787 | /* Flag session that trace should start automatically */ | |
2788 | if (usess) { | |
82b69413 JG |
2789 | int int_ret = ust_app_start_trace_all(usess); |
2790 | ||
2791 | if (int_ret < 0) { | |
f73fabfd | 2792 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2793 | goto error; |
2794 | } | |
2795 | } | |
2796 | ||
5c408ad8 JD |
2797 | /* |
2798 | * Clear the flag that indicates that a rotation was done while the | |
2799 | * session was stopped. | |
2800 | */ | |
2801 | session->rotated_after_last_stop = false; | |
2802 | ||
259c2674 | 2803 | if (session->rotate_timer_period) { |
82b69413 JG |
2804 | int int_ret = timer_session_rotation_schedule_timer_start( |
2805 | session, session->rotate_timer_period); | |
2806 | ||
2807 | if (int_ret < 0) { | |
259c2674 JD |
2808 | ERR("Failed to enable rotate timer"); |
2809 | ret = LTTNG_ERR_UNK; | |
2810 | goto error; | |
2811 | } | |
2812 | } | |
2813 | ||
f73fabfd | 2814 | ret = LTTNG_OK; |
2f77fc4b DG |
2815 | |
2816 | error: | |
1f496244 JG |
2817 | if (ret == LTTNG_OK) { |
2818 | /* Flag this after a successful start. */ | |
2819 | session->has_been_started |= 1; | |
2820 | } else { | |
2821 | session->active = 0; | |
2822 | /* Restore initial state on error. */ | |
2823 | session->rotated_after_last_stop = | |
2824 | session_rotated_after_last_stop; | |
b02f5986 MD |
2825 | session->cleared_after_last_stop = |
2826 | session_cleared_after_last_stop; | |
1f496244 | 2827 | } |
7a24ece3 | 2828 | end: |
2f77fc4b DG |
2829 | return ret; |
2830 | } | |
2831 | ||
2832 | /* | |
2833 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2834 | */ | |
2835 | int cmd_stop_trace(struct ltt_session *session) | |
2836 | { | |
2837 | int ret; | |
2f77fc4b DG |
2838 | struct ltt_kernel_session *ksession; |
2839 | struct ltt_ust_session *usess; | |
2840 | ||
2841 | assert(session); | |
2842 | ||
4dbe1875 | 2843 | DBG("Begin stop session \"%s\" (id %" PRIu64 ")", session->name, session->id); |
2f77fc4b DG |
2844 | /* Short cut */ |
2845 | ksession = session->kernel_session; | |
2846 | usess = session->ust_session; | |
2847 | ||
8382cf6f DG |
2848 | /* Session is not active. Skip everythong and inform the client. */ |
2849 | if (!session->active) { | |
f73fabfd | 2850 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2851 | goto error; |
2852 | } | |
2853 | ||
4dbe1875 MD |
2854 | ret = stop_kernel_session(ksession); |
2855 | if (ret != LTTNG_OK) { | |
2856 | goto error; | |
2f77fc4b DG |
2857 | } |
2858 | ||
14fb1ebe | 2859 | if (usess && usess->active) { |
2f77fc4b DG |
2860 | ret = ust_app_stop_trace_all(usess); |
2861 | if (ret < 0) { | |
f73fabfd | 2862 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2863 | goto error; |
2864 | } | |
2865 | } | |
2866 | ||
4dbe1875 MD |
2867 | DBG("Completed stop session \"%s\" (id %" PRIu64 ")", session->name, |
2868 | session->id); | |
8382cf6f DG |
2869 | /* Flag inactive after a successful stop. */ |
2870 | session->active = 0; | |
4dbe1875 | 2871 | ret = LTTNG_OK; |
2f77fc4b DG |
2872 | |
2873 | error: | |
2874 | return ret; | |
2875 | } | |
2876 | ||
2877 | /* | |
433f5ba9 JR |
2878 | * Set the base_path of the session only if subdir of a control uris is set. |
2879 | * Return LTTNG_OK on success, otherwise LTTNG_ERR_*. | |
2f77fc4b | 2880 | */ |
433f5ba9 JR |
2881 | static int set_session_base_path_from_uris(struct ltt_session *session, |
2882 | size_t nb_uri, | |
bda32d56 | 2883 | struct lttng_uri *uris) |
2f77fc4b | 2884 | { |
433f5ba9 JR |
2885 | int ret; |
2886 | size_t i; | |
2f77fc4b | 2887 | |
e3876bf0 JR |
2888 | for (i = 0; i < nb_uri; i++) { |
2889 | if (uris[i].stype != LTTNG_STREAM_CONTROL || | |
2890 | uris[i].subdir[0] == '\0') { | |
2891 | /* Not interested in these URIs */ | |
2892 | continue; | |
2893 | } | |
2894 | ||
2895 | if (session->base_path != NULL) { | |
2896 | free(session->base_path); | |
2897 | session->base_path = NULL; | |
2898 | } | |
2899 | ||
2900 | /* Set session base_path */ | |
2901 | session->base_path = strdup(uris[i].subdir); | |
2902 | if (!session->base_path) { | |
433f5ba9 JR |
2903 | PERROR("Failed to copy base path \"%s\" to session \"%s\"", |
2904 | uris[i].subdir, session->name); | |
2905 | ret = LTTNG_ERR_NOMEM; | |
e3876bf0 JR |
2906 | goto error; |
2907 | } | |
433f5ba9 JR |
2908 | DBG2("Setting base path \"%s\" for session \"%s\"", |
2909 | session->base_path, session->name); | |
2910 | } | |
2911 | ret = LTTNG_OK; | |
2912 | error: | |
2913 | return ret; | |
2914 | } | |
2915 | ||
2916 | /* | |
2917 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2918 | */ | |
2919 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, | |
2920 | struct lttng_uri *uris) | |
2921 | { | |
2922 | int ret, i; | |
2923 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2924 | struct ltt_ust_session *usess = session->ust_session; | |
2925 | ||
2926 | assert(session); | |
2927 | assert(uris); | |
2928 | assert(nb_uri > 0); | |
2929 | ||
2930 | /* Can't set consumer URI if the session is active. */ | |
2931 | if (session->active) { | |
2932 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; | |
2933 | goto error; | |
2934 | } | |
2935 | ||
2936 | /* | |
2937 | * Set the session base path if any. This is done inside | |
2938 | * cmd_set_consumer_uri to preserve backward compatibility of the | |
2939 | * previous session creation api vs the session descriptor api. | |
2940 | */ | |
2941 | ret = set_session_base_path_from_uris(session, nb_uri, uris); | |
2942 | if (ret != LTTNG_OK) { | |
2943 | goto error; | |
e3876bf0 JR |
2944 | } |
2945 | ||
bda32d56 | 2946 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2947 | for (i = 0; i < nb_uri; i++) { |
e3876bf0 JR |
2948 | ret = add_uri_to_consumer(session, session->consumer, &uris[i], |
2949 | LTTNG_DOMAIN_NONE); | |
a74934ba | 2950 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2951 | goto error; |
2952 | } | |
2f77fc4b DG |
2953 | } |
2954 | ||
bda32d56 JG |
2955 | /* Set UST session URIs */ |
2956 | if (session->ust_session) { | |
2957 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2958 | ret = add_uri_to_consumer(session, |
bda32d56 | 2959 | session->ust_session->consumer, |
b178f53e | 2960 | &uris[i], LTTNG_DOMAIN_UST); |
bda32d56 JG |
2961 | if (ret != LTTNG_OK) { |
2962 | goto error; | |
2963 | } | |
2964 | } | |
2965 | } | |
2966 | ||
2967 | /* Set kernel session URIs */ | |
2968 | if (session->kernel_session) { | |
2969 | for (i = 0; i < nb_uri; i++) { | |
b178f53e | 2970 | ret = add_uri_to_consumer(session, |
bda32d56 | 2971 | session->kernel_session->consumer, |
b178f53e | 2972 | &uris[i], LTTNG_DOMAIN_KERNEL); |
bda32d56 JG |
2973 | if (ret != LTTNG_OK) { |
2974 | goto error; | |
2975 | } | |
2976 | } | |
2977 | } | |
2978 | ||
7ab70fe0 DG |
2979 | /* |
2980 | * Make sure to set the session in output mode after we set URI since a | |
2981 | * session can be created without URL (thus flagged in no output mode). | |
2982 | */ | |
2983 | session->output_traces = 1; | |
2984 | if (ksess) { | |
2985 | ksess->output_traces = 1; | |
bda32d56 JG |
2986 | } |
2987 | ||
2988 | if (usess) { | |
7ab70fe0 DG |
2989 | usess->output_traces = 1; |
2990 | } | |
2991 | ||
2f77fc4b | 2992 | /* All good! */ |
f73fabfd | 2993 | ret = LTTNG_OK; |
2f77fc4b DG |
2994 | |
2995 | error: | |
2996 | return ret; | |
2997 | } | |
2998 | ||
b178f53e JG |
2999 | static |
3000 | enum lttng_error_code set_session_output_from_descriptor( | |
3001 | struct ltt_session *session, | |
3002 | const struct lttng_session_descriptor *descriptor) | |
2f77fc4b DG |
3003 | { |
3004 | int ret; | |
b178f53e JG |
3005 | enum lttng_error_code ret_code = LTTNG_OK; |
3006 | enum lttng_session_descriptor_type session_type = | |
3007 | lttng_session_descriptor_get_type(descriptor); | |
3008 | enum lttng_session_descriptor_output_type output_type = | |
3009 | lttng_session_descriptor_get_output_type(descriptor); | |
3010 | struct lttng_uri uris[2] = {}; | |
3011 | size_t uri_count = 0; | |
3012 | ||
3013 | switch (output_type) { | |
3014 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: | |
3015 | goto end; | |
3016 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: | |
3017 | lttng_session_descriptor_get_local_output_uri(descriptor, | |
3018 | &uris[0]); | |
3019 | uri_count = 1; | |
3020 | break; | |
3021 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: | |
3022 | lttng_session_descriptor_get_network_output_uris(descriptor, | |
3023 | &uris[0], &uris[1]); | |
3024 | uri_count = 2; | |
3025 | break; | |
3026 | default: | |
3027 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3028 | goto end; |
2f77fc4b DG |
3029 | } |
3030 | ||
b178f53e JG |
3031 | switch (session_type) { |
3032 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3033 | { | |
3034 | struct snapshot_output *new_output = NULL; | |
3035 | ||
3036 | new_output = snapshot_output_alloc(); | |
3037 | if (!new_output) { | |
3038 | ret_code = LTTNG_ERR_NOMEM; | |
3039 | goto end; | |
3040 | } | |
3041 | ||
3042 | ret = snapshot_output_init_with_uri(session, | |
3043 | DEFAULT_SNAPSHOT_MAX_SIZE, | |
3044 | NULL, uris, uri_count, session->consumer, | |
3045 | new_output, &session->snapshot); | |
3046 | if (ret < 0) { | |
3047 | ret_code = (ret == -ENOMEM) ? | |
3048 | LTTNG_ERR_NOMEM : LTTNG_ERR_INVALID; | |
3049 | snapshot_output_destroy(new_output); | |
3050 | goto end; | |
3051 | } | |
3052 | snapshot_add_output(&session->snapshot, new_output); | |
3053 | break; | |
3054 | } | |
3055 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: | |
3056 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3057 | { | |
3058 | ret_code = cmd_set_consumer_uri(session, uri_count, uris); | |
3059 | break; | |
3060 | } | |
3061 | default: | |
3062 | ret_code = LTTNG_ERR_INVALID; | |
e32d7f27 | 3063 | goto end; |
2f77fc4b | 3064 | } |
b178f53e JG |
3065 | end: |
3066 | return ret_code; | |
3067 | } | |
3068 | ||
3069 | static | |
3070 | enum lttng_error_code cmd_create_session_from_descriptor( | |
3071 | struct lttng_session_descriptor *descriptor, | |
3072 | const lttng_sock_cred *creds, | |
3073 | const char *home_path) | |
3074 | { | |
3075 | int ret; | |
3076 | enum lttng_error_code ret_code; | |
3077 | const char *session_name; | |
3078 | struct ltt_session *new_session = NULL; | |
3079 | enum lttng_session_descriptor_status descriptor_status; | |
2f77fc4b | 3080 | |
e32d7f27 | 3081 | session_lock_list(); |
b178f53e JG |
3082 | if (home_path) { |
3083 | if (*home_path != '/') { | |
3084 | ERR("Home path provided by client is not absolute"); | |
3085 | ret_code = LTTNG_ERR_INVALID; | |
3086 | goto end; | |
3087 | } | |
3088 | } | |
2f77fc4b | 3089 | |
b178f53e JG |
3090 | descriptor_status = lttng_session_descriptor_get_session_name( |
3091 | descriptor, &session_name); | |
3092 | switch (descriptor_status) { | |
3093 | case LTTNG_SESSION_DESCRIPTOR_STATUS_OK: | |
3094 | break; | |
3095 | case LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET: | |
3096 | session_name = NULL; | |
3097 | break; | |
3098 | default: | |
3099 | ret_code = LTTNG_ERR_INVALID; | |
3100 | goto end; | |
3101 | } | |
e3876bf0 | 3102 | |
b178f53e | 3103 | ret_code = session_create(session_name, creds->uid, creds->gid, |
e3876bf0 | 3104 | &new_session); |
b178f53e | 3105 | if (ret_code != LTTNG_OK) { |
e32d7f27 | 3106 | goto end; |
2f77fc4b DG |
3107 | } |
3108 | ||
b178f53e JG |
3109 | if (!session_name) { |
3110 | ret = lttng_session_descriptor_set_session_name(descriptor, | |
3111 | new_session->name); | |
3112 | if (ret) { | |
3113 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3114 | goto end; | |
3115 | } | |
3116 | } | |
3117 | ||
3118 | if (!lttng_session_descriptor_is_output_destination_initialized( | |
3119 | descriptor)) { | |
3120 | /* | |
3121 | * Only include the session's creation time in the output | |
3122 | * destination if the name of the session itself was | |
3123 | * not auto-generated. | |
3124 | */ | |
3125 | ret_code = lttng_session_descriptor_set_default_output( | |
3126 | descriptor, | |
3127 | session_name ? &new_session->creation_time : NULL, | |
3128 | home_path); | |
3129 | if (ret_code != LTTNG_OK) { | |
e32d7f27 | 3130 | goto end; |
2bba9e53 | 3131 | } |
2bba9e53 | 3132 | } else { |
b178f53e JG |
3133 | new_session->has_user_specified_directory = |
3134 | lttng_session_descriptor_has_output_directory( | |
3135 | descriptor); | |
2f77fc4b DG |
3136 | } |
3137 | ||
b178f53e JG |
3138 | switch (lttng_session_descriptor_get_type(descriptor)) { |
3139 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: | |
3140 | new_session->snapshot_mode = 1; | |
3141 | break; | |
3142 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: | |
3143 | new_session->live_timer = | |
3144 | lttng_session_descriptor_live_get_timer_interval( | |
3145 | descriptor); | |
3146 | break; | |
3147 | default: | |
3148 | break; | |
3149 | } | |
2f77fc4b | 3150 | |
b178f53e JG |
3151 | ret_code = set_session_output_from_descriptor(new_session, descriptor); |
3152 | if (ret_code != LTTNG_OK) { | |
3153 | goto end; | |
3154 | } | |
3155 | new_session->consumer->enabled = 1; | |
3156 | ret_code = LTTNG_OK; | |
e32d7f27 | 3157 | end: |
b178f53e JG |
3158 | /* Release reference provided by the session_create function. */ |
3159 | session_put(new_session); | |
3160 | if (ret_code != LTTNG_OK && new_session) { | |
3161 | /* Release the global reference on error. */ | |
3162 | session_destroy(new_session); | |
e32d7f27 | 3163 | } |
b178f53e JG |
3164 | session_unlock_list(); |
3165 | return ret_code; | |
2f77fc4b DG |
3166 | } |
3167 | ||
b178f53e JG |
3168 | enum lttng_error_code cmd_create_session(struct command_ctx *cmd_ctx, int sock, |
3169 | struct lttng_session_descriptor **return_descriptor) | |
27babd3a DG |
3170 | { |
3171 | int ret; | |
b178f53e JG |
3172 | size_t payload_size; |
3173 | struct lttng_dynamic_buffer payload; | |
3174 | struct lttng_buffer_view home_dir_view; | |
3175 | struct lttng_buffer_view session_descriptor_view; | |
3176 | struct lttng_session_descriptor *session_descriptor = NULL; | |
3177 | enum lttng_error_code ret_code; | |
3178 | ||
3179 | lttng_dynamic_buffer_init(&payload); | |
3180 | if (cmd_ctx->lsm->u.create_session.home_dir_size >= | |
3181 | LTTNG_PATH_MAX) { | |
3182 | ret_code = LTTNG_ERR_INVALID; | |
3183 | goto error; | |
27babd3a | 3184 | } |
b178f53e JG |
3185 | if (cmd_ctx->lsm->u.create_session.session_descriptor_size > |
3186 | LTTNG_SESSION_DESCRIPTOR_MAX_LEN) { | |
3187 | ret_code = LTTNG_ERR_INVALID; | |
3188 | goto error; | |
27babd3a DG |
3189 | } |
3190 | ||
b178f53e JG |
3191 | payload_size = cmd_ctx->lsm->u.create_session.home_dir_size + |
3192 | cmd_ctx->lsm->u.create_session.session_descriptor_size; | |
3193 | ret = lttng_dynamic_buffer_set_size(&payload, payload_size); | |
3194 | if (ret) { | |
3195 | ret_code = LTTNG_ERR_NOMEM; | |
3196 | goto error; | |
27babd3a DG |
3197 | } |
3198 | ||
b178f53e JG |
3199 | ret = lttcomm_recv_unix_sock(sock, payload.data, payload.size); |
3200 | if (ret <= 0) { | |
3201 | ERR("Reception of session descriptor failed, aborting."); | |
3202 | ret_code = LTTNG_ERR_SESSION_FAIL; | |
3203 | goto error; | |
27babd3a DG |
3204 | } |
3205 | ||
b178f53e JG |
3206 | home_dir_view = lttng_buffer_view_from_dynamic_buffer( |
3207 | &payload, | |
3208 | 0, | |
3209 | cmd_ctx->lsm->u.create_session.home_dir_size); | |
3210 | session_descriptor_view = lttng_buffer_view_from_dynamic_buffer( | |
3211 | &payload, | |
3212 | cmd_ctx->lsm->u.create_session.home_dir_size, | |
3213 | cmd_ctx->lsm->u.create_session.session_descriptor_size); | |
27babd3a | 3214 | |
b178f53e JG |
3215 | ret = lttng_session_descriptor_create_from_buffer( |
3216 | &session_descriptor_view, &session_descriptor); | |
3217 | if (ret < 0) { | |
3218 | ERR("Failed to create session descriptor from payload of \"create session\" command"); | |
3219 | ret_code = LTTNG_ERR_INVALID; | |
3220 | goto error; | |
3221 | } | |
27babd3a | 3222 | |
b178f53e JG |
3223 | /* |
3224 | * Sets the descriptor's auto-generated properties (name, output) if | |
3225 | * needed. | |
3226 | */ | |
3227 | ret_code = cmd_create_session_from_descriptor(session_descriptor, | |
3228 | &cmd_ctx->creds, | |
3229 | home_dir_view.size ? home_dir_view.data : NULL); | |
3230 | if (ret_code != LTTNG_OK) { | |
3231 | goto error; | |
e32d7f27 | 3232 | } |
b178f53e JG |
3233 | |
3234 | ret_code = LTTNG_OK; | |
3235 | *return_descriptor = session_descriptor; | |
3236 | session_descriptor = NULL; | |
3237 | error: | |
3238 | lttng_dynamic_buffer_reset(&payload); | |
3239 | lttng_session_descriptor_destroy(session_descriptor); | |
3240 | return ret_code; | |
27babd3a DG |
3241 | } |
3242 | ||
3e3665b8 JG |
3243 | static |
3244 | void cmd_destroy_session_reply(const struct ltt_session *session, | |
3245 | void *_reply_context) | |
3246 | { | |
3247 | int ret; | |
3248 | ssize_t comm_ret; | |
3249 | const struct cmd_destroy_session_reply_context *reply_context = | |
3250 | _reply_context; | |
3251 | struct lttng_dynamic_buffer payload; | |
3252 | struct lttcomm_session_destroy_command_header cmd_header; | |
3253 | struct lttng_trace_archive_location *location = NULL; | |
3254 | struct lttcomm_lttng_msg llm = { | |
3255 | .cmd_type = LTTNG_DESTROY_SESSION, | |
3285a971 | 3256 | .ret_code = reply_context->destruction_status, |
3e3665b8 JG |
3257 | .pid = UINT32_MAX, |
3258 | .cmd_header_size = | |
3259 | sizeof(struct lttcomm_session_destroy_command_header), | |
3260 | .data_size = 0, | |
3261 | }; | |
3262 | size_t payload_size_before_location; | |
3263 | ||
3264 | lttng_dynamic_buffer_init(&payload); | |
3265 | ||
3266 | ret = lttng_dynamic_buffer_append(&payload, &llm, sizeof(llm)); | |
3267 | if (ret) { | |
3268 | ERR("Failed to append session destruction message"); | |
3269 | goto error; | |
3270 | } | |
3271 | ||
3272 | cmd_header.rotation_state = | |
3273 | (int32_t) (reply_context->implicit_rotation_on_destroy ? | |
3274 | session->rotation_state : | |
3275 | LTTNG_ROTATION_STATE_NO_ROTATION); | |
3276 | ret = lttng_dynamic_buffer_append(&payload, &cmd_header, | |
3277 | sizeof(cmd_header)); | |
3278 | if (ret) { | |
3279 | ERR("Failed to append session destruction command header"); | |
3280 | goto error; | |
3281 | } | |
3282 | ||
3283 | if (!reply_context->implicit_rotation_on_destroy) { | |
3284 | DBG("No implicit rotation performed during the destruction of session \"%s\", sending reply", | |
3285 | session->name); | |
3286 | goto send_reply; | |
3287 | } | |
3288 | if (session->rotation_state != LTTNG_ROTATION_STATE_COMPLETED) { | |
3289 | DBG("Rotation state of session \"%s\" is not \"completed\", sending session destruction reply", | |
3290 | session->name); | |
3291 | goto send_reply; | |
3292 | } | |
3293 | ||
3294 | location = session_get_trace_archive_location(session); | |
3295 | if (!location) { | |
3296 | ERR("Failed to get the location of the trace archive produced during the destruction of session \"%s\"", | |
3297 | session->name); | |
3298 | goto error; | |
3299 | } | |
3300 | ||
3301 | payload_size_before_location = payload.size; | |
3302 | comm_ret = lttng_trace_archive_location_serialize(location, | |
3303 | &payload); | |
3304 | if (comm_ret < 0) { | |
3305 | ERR("Failed to serialize the location of the trace archive produced during the destruction of session \"%s\"", | |
3306 | session->name); | |
3307 | goto error; | |
3308 | } | |
3309 | /* Update the message to indicate the location's length. */ | |
3310 | ((struct lttcomm_lttng_msg *) payload.data)->data_size = | |
3311 | payload.size - payload_size_before_location; | |
3312 | send_reply: | |
3313 | comm_ret = lttcomm_send_unix_sock(reply_context->reply_sock_fd, | |
3314 | payload.data, payload.size); | |
3315 | if (comm_ret != (ssize_t) payload.size) { | |
3316 | ERR("Failed to send result of the destruction of session \"%s\" to client", | |
3317 | session->name); | |
3318 | } | |
3319 | error: | |
3320 | ret = close(reply_context->reply_sock_fd); | |
3321 | if (ret) { | |
3322 | PERROR("Failed to close client socket in deferred session destroy reply"); | |
3323 | } | |
3324 | lttng_dynamic_buffer_reset(&payload); | |
3325 | free(_reply_context); | |
3326 | } | |
3327 | ||
2f77fc4b DG |
3328 | /* |
3329 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
3330 | * |
3331 | * Called with session lock held. | |
2f77fc4b | 3332 | */ |
e32d7f27 | 3333 | int cmd_destroy_session(struct ltt_session *session, |
3e3665b8 JG |
3334 | struct notification_thread_handle *notification_thread_handle, |
3335 | int *sock_fd) | |
2f77fc4b DG |
3336 | { |
3337 | int ret; | |
3285a971 | 3338 | enum lttng_error_code destruction_last_error = LTTNG_OK; |
3e3665b8 JG |
3339 | struct cmd_destroy_session_reply_context *reply_context = NULL; |
3340 | ||
3341 | if (sock_fd) { | |
3342 | reply_context = zmalloc(sizeof(*reply_context)); | |
3343 | if (!reply_context) { | |
3344 | ret = LTTNG_ERR_NOMEM; | |
3345 | goto end; | |
3346 | } | |
3347 | reply_context->reply_sock_fd = *sock_fd; | |
3348 | } | |
2f77fc4b DG |
3349 | |
3350 | /* Safety net */ | |
3351 | assert(session); | |
3352 | ||
3e3665b8 JG |
3353 | DBG("Begin destroy session %s (id %" PRIu64 ")", session->name, |
3354 | session->id); | |
3355 | if (session->active) { | |
3356 | DBG("Session \"%s\" is active, attempting to stop it before destroying it", | |
3357 | session->name); | |
3358 | ret = cmd_stop_trace(session); | |
3359 | if (ret != LTTNG_OK && ret != LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
3360 | /* Carry on with the destruction of the session. */ | |
3361 | ERR("Failed to stop session \"%s\" as part of its destruction: %s", | |
3362 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3363 | destruction_last_error = ret; |
3e3665b8 JG |
3364 | } |
3365 | } | |
5c408ad8 | 3366 | |
92816cc3 JG |
3367 | if (session->rotation_schedule_timer_enabled) { |
3368 | if (timer_session_rotation_schedule_timer_stop( | |
3369 | session)) { | |
3370 | ERR("Failed to stop the \"rotation schedule\" timer of session %s", | |
3371 | session->name); | |
3285a971 | 3372 | destruction_last_error = LTTNG_ERR_TIMER_STOP_ERROR; |
92816cc3 | 3373 | } |
259c2674 JD |
3374 | } |
3375 | ||
90936dcf JD |
3376 | if (session->rotate_size) { |
3377 | unsubscribe_session_consumed_size_rotation(session, notification_thread_handle); | |
3378 | session->rotate_size = 0; | |
3379 | } | |
3380 | ||
a7ceb342 | 3381 | if (session->rotated && session->current_trace_chunk && session->output_traces) { |
b5893d8e JG |
3382 | /* |
3383 | * Perform a last rotation on destruction if rotations have | |
3384 | * occurred during the session's lifetime. | |
3385 | */ | |
343defc2 MD |
3386 | ret = cmd_rotate_session(session, NULL, false, |
3387 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
d2956687 JG |
3388 | if (ret != LTTNG_OK) { |
3389 | ERR("Failed to perform an implicit rotation as part of the destruction of session \"%s\": %s", | |
3390 | session->name, lttng_strerror(-ret)); | |
3285a971 | 3391 | destruction_last_error = -ret; |
124473a3 | 3392 | } |
3e3665b8 JG |
3393 | if (reply_context) { |
3394 | reply_context->implicit_rotation_on_destroy = true; | |
3395 | } | |
070b6a86 | 3396 | } else if (session->has_been_started && session->current_trace_chunk) { |
7fdbed1c JG |
3397 | /* |
3398 | * The user has not triggered a session rotation. However, to | |
3399 | * ensure all data has been consumed, the session is rotated | |
3400 | * to a 'null' trace chunk before it is destroyed. | |
3401 | * | |
3402 | * This is a "quiet" rotation meaning that no notification is | |
3403 | * emitted and no renaming of the current trace chunk takes | |
3404 | * place. | |
3405 | */ | |
343defc2 MD |
3406 | ret = cmd_rotate_session(session, NULL, true, |
3407 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION); | |
53fb6336 JG |
3408 | /* |
3409 | * Rotation operations may not be supported by the kernel | |
3410 | * tracer. Hence, do not consider this implicit rotation as | |
3411 | * a session destruction error. The library has already stopped | |
3412 | * the session and waited for pending data; there is nothing | |
3413 | * left to do but complete the destruction of the session. | |
3414 | */ | |
3415 | if (ret != LTTNG_OK && | |
3416 | ret != -LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL) { | |
7fdbed1c | 3417 | ERR("Failed to perform a quiet rotation as part of the destruction of session \"%s\": %s", |
53fb6336 | 3418 | session->name, lttng_strerror(ret)); |
3285a971 | 3419 | destruction_last_error = -ret; |
7fdbed1c JG |
3420 | } |
3421 | } | |
5c408ad8 | 3422 | |
a503e1ef JG |
3423 | if (session->shm_path[0]) { |
3424 | /* | |
3425 | * When a session is created with an explicit shm_path, | |
3426 | * the consumer daemon will create its shared memory files | |
3427 | * at that location and will *not* unlink them. This is normal | |
3428 | * as the intention of that feature is to make it possible | |
3429 | * to retrieve the content of those files should a crash occur. | |
3430 | * | |
3431 | * To ensure the content of those files can be used, the | |
3432 | * sessiond daemon will replicate the content of the metadata | |
3433 | * cache in a metadata file. | |
3434 | * | |
3435 | * On clean-up, it is expected that the consumer daemon will | |
3436 | * unlink the shared memory files and that the session daemon | |
3437 | * will unlink the metadata file. Then, the session's directory | |
3438 | * in the shm path can be removed. | |
3439 | * | |
3440 | * Unfortunately, a flaw in the design of the sessiond's and | |
3441 | * consumerd's tear down of channels makes it impossible to | |
3442 | * determine when the sessiond _and_ the consumerd have both | |
3443 | * destroyed their representation of a channel. For one, the | |
3444 | * unlinking, close, and rmdir happen in deferred 'call_rcu' | |
3445 | * callbacks in both daemons. | |
3446 | * | |
3447 | * However, it is also impossible for the sessiond to know when | |
3448 | * the consumer daemon is done destroying its channel(s) since | |
3449 | * it occurs as a reaction to the closing of the channel's file | |
3450 | * descriptor. There is no resulting communication initiated | |
3451 | * from the consumerd to the sessiond to confirm that the | |
3452 | * operation is completed (and was successful). | |
3453 | * | |
3454 | * Until this is all fixed, the session daemon checks for the | |
3455 | * removal of the session's shm path which makes it possible | |
3456 | * to safely advertise a session as having been destroyed. | |
3457 | * | |
3458 | * Prior to this fix, it was not possible to reliably save | |
3459 | * a session making use of the --shm-path option, destroy it, | |
3460 | * and load it again. This is because the creation of the | |
3461 | * session would fail upon seeing the session's shm path | |
3462 | * already in existence. | |
3463 | * | |
3464 | * Note that none of the error paths in the check for the | |
3465 | * directory's existence return an error. This is normal | |
3466 | * as there isn't much that can be done. The session will | |
3467 | * be destroyed properly, except that we can't offer the | |
3468 | * guarantee that the same session can be re-created. | |
3469 | */ | |
3470 | current_completion_handler = &destroy_completion_handler.handler; | |
3471 | ret = lttng_strncpy(destroy_completion_handler.shm_path, | |
3472 | session->shm_path, | |
3473 | sizeof(destroy_completion_handler.shm_path)); | |
3474 | assert(!ret); | |
3475 | } | |
e32d7f27 JG |
3476 | |
3477 | /* | |
3478 | * The session is destroyed. However, note that the command context | |
3479 | * still holds a reference to the session, thus delaying its destruction | |
3480 | * _at least_ up to the point when that reference is released. | |
3481 | */ | |
3482 | session_destroy(session); | |
3e3665b8 | 3483 | if (reply_context) { |
3285a971 | 3484 | reply_context->destruction_status = destruction_last_error; |
3e3665b8 JG |
3485 | ret = session_add_destroy_notifier(session, |
3486 | cmd_destroy_session_reply, | |
3487 | (void *) reply_context); | |
3488 | if (ret) { | |
3489 | ret = LTTNG_ERR_FATAL; | |
3490 | goto end; | |
3491 | } else { | |
3492 | *sock_fd = -1; | |
3493 | } | |
3494 | } | |
3495 | ret = LTTNG_OK; | |
3496 | end: | |
2f77fc4b DG |
3497 | return ret; |
3498 | } | |
3499 | ||
2f77fc4b DG |
3500 | /* |
3501 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3502 | */ | |
56a37563 JG |
3503 | int cmd_register_consumer(struct ltt_session *session, |
3504 | enum lttng_domain_type domain, const char *sock_path, | |
3505 | struct consumer_data *cdata) | |
2f77fc4b DG |
3506 | { |
3507 | int ret, sock; | |
dd81b457 | 3508 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
3509 | |
3510 | assert(session); | |
3511 | assert(cdata); | |
3512 | assert(sock_path); | |
3513 | ||
3514 | switch (domain) { | |
3515 | case LTTNG_DOMAIN_KERNEL: | |
3516 | { | |
3517 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3518 | ||
3519 | assert(ksess); | |
3520 | ||
3521 | /* Can't register a consumer if there is already one */ | |
3522 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 3523 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
3524 | goto error; |
3525 | } | |
3526 | ||
3527 | sock = lttcomm_connect_unix_sock(sock_path); | |
3528 | if (sock < 0) { | |
f73fabfd | 3529 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
3530 | goto error; |
3531 | } | |
4ce514c4 | 3532 | cdata->cmd_sock = sock; |
2f77fc4b | 3533 | |
4ce514c4 | 3534 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 3535 | if (socket == NULL) { |
f66c074c DG |
3536 | ret = close(sock); |
3537 | if (ret < 0) { | |
3538 | PERROR("close register consumer"); | |
3539 | } | |
4ce514c4 | 3540 | cdata->cmd_sock = -1; |
f73fabfd | 3541 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3542 | goto error; |
3543 | } | |
3544 | ||
3545 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
3546 | if (socket->lock == NULL) { | |
3547 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 3548 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3549 | goto error; |
3550 | } | |
3551 | pthread_mutex_init(socket->lock, NULL); | |
3552 | socket->registered = 1; | |
3553 | ||
3554 | rcu_read_lock(); | |
3555 | consumer_add_socket(socket, ksess->consumer); | |
3556 | rcu_read_unlock(); | |
3557 | ||
3558 | pthread_mutex_lock(&cdata->pid_mutex); | |
3559 | cdata->pid = -1; | |
3560 | pthread_mutex_unlock(&cdata->pid_mutex); | |
3561 | ||
3562 | break; | |
3563 | } | |
3564 | default: | |
3565 | /* TODO: Userspace tracing */ | |
f73fabfd | 3566 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3567 | goto error; |
3568 | } | |
3569 | ||
dd81b457 | 3570 | return LTTNG_OK; |
2f77fc4b DG |
3571 | |
3572 | error: | |
dd81b457 DG |
3573 | if (socket) { |
3574 | consumer_destroy_socket(socket); | |
3575 | } | |
2f77fc4b DG |
3576 | return ret; |
3577 | } | |
3578 | ||
3579 | /* | |
3580 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3581 | */ | |
3582 | ssize_t cmd_list_domains(struct ltt_session *session, | |
3583 | struct lttng_domain **domains) | |
3584 | { | |
3585 | int ret, index = 0; | |
3586 | ssize_t nb_dom = 0; | |
fefd409b DG |
3587 | struct agent *agt; |
3588 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
3589 | |
3590 | if (session->kernel_session != NULL) { | |
3591 | DBG3("Listing domains found kernel domain"); | |
3592 | nb_dom++; | |
3593 | } | |
3594 | ||
3595 | if (session->ust_session != NULL) { | |
3596 | DBG3("Listing domains found UST global domain"); | |
3597 | nb_dom++; | |
3c6a091f | 3598 | |
e0a74f01 | 3599 | rcu_read_lock(); |
fefd409b DG |
3600 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3601 | agt, node.node) { | |
3602 | if (agt->being_used) { | |
3603 | nb_dom++; | |
3604 | } | |
3c6a091f | 3605 | } |
e0a74f01 | 3606 | rcu_read_unlock(); |
2f77fc4b DG |
3607 | } |
3608 | ||
fa64dfb4 JG |
3609 | if (!nb_dom) { |
3610 | goto end; | |
3611 | } | |
3612 | ||
2f77fc4b DG |
3613 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
3614 | if (*domains == NULL) { | |
f73fabfd | 3615 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
3616 | goto error; |
3617 | } | |
3618 | ||
3619 | if (session->kernel_session != NULL) { | |
3620 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
b5edb9e8 PP |
3621 | |
3622 | /* Kernel session buffer type is always GLOBAL */ | |
3623 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
3624 | ||
2f77fc4b DG |
3625 | index++; |
3626 | } | |
3627 | ||
3628 | if (session->ust_session != NULL) { | |
3629 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 3630 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 3631 | index++; |
3c6a091f | 3632 | |
e0a74f01 | 3633 | rcu_read_lock(); |
fefd409b DG |
3634 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
3635 | agt, node.node) { | |
3636 | if (agt->being_used) { | |
3637 | (*domains)[index].type = agt->domain; | |
3638 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
3639 | index++; | |
3640 | } | |
3c6a091f | 3641 | } |
e0a74f01 | 3642 | rcu_read_unlock(); |
2f77fc4b | 3643 | } |
fa64dfb4 | 3644 | end: |
2f77fc4b DG |
3645 | return nb_dom; |
3646 | ||
3647 | error: | |
f73fabfd DG |
3648 | /* Return negative value to differentiate return code */ |
3649 | return -ret; | |
2f77fc4b DG |
3650 | } |
3651 | ||
3652 | ||
3653 | /* | |
3654 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3655 | */ | |
56a37563 JG |
3656 | ssize_t cmd_list_channels(enum lttng_domain_type domain, |
3657 | struct ltt_session *session, struct lttng_channel **channels) | |
2f77fc4b | 3658 | { |
53e367f9 | 3659 | ssize_t nb_chan = 0, payload_size = 0, ret; |
2f77fc4b DG |
3660 | |
3661 | switch (domain) { | |
3662 | case LTTNG_DOMAIN_KERNEL: | |
3663 | if (session->kernel_session != NULL) { | |
3664 | nb_chan = session->kernel_session->channel_count; | |
3665 | } | |
3666 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 | 3667 | if (nb_chan <= 0) { |
53e367f9 JG |
3668 | ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
3669 | goto end; | |
c7d620a2 | 3670 | } |
2f77fc4b DG |
3671 | break; |
3672 | case LTTNG_DOMAIN_UST: | |
3673 | if (session->ust_session != NULL) { | |
7ffc31a2 | 3674 | rcu_read_lock(); |
2f77fc4b | 3675 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
3676 | session->ust_session->domain_global.channels); |
3677 | rcu_read_unlock(); | |
2f77fc4b DG |
3678 | } |
3679 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 3680 | if (nb_chan < 0) { |
53e367f9 JG |
3681 | ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND; |
3682 | goto end; | |
c7d620a2 | 3683 | } |
2f77fc4b DG |
3684 | break; |
3685 | default: | |
53e367f9 JG |
3686 | ret = -LTTNG_ERR_UND; |
3687 | goto end; | |
2f77fc4b DG |
3688 | } |
3689 | ||
3690 | if (nb_chan > 0) { | |
53e367f9 | 3691 | const size_t channel_size = sizeof(struct lttng_channel) + |
cf0bcb51 JG |
3692 | sizeof(struct lttng_channel_extended); |
3693 | struct lttng_channel_extended *channel_exts; | |
53e367f9 JG |
3694 | |
3695 | payload_size = nb_chan * channel_size; | |
3696 | *channels = zmalloc(payload_size); | |
2f77fc4b | 3697 | if (*channels == NULL) { |
53e367f9 JG |
3698 | ret = -LTTNG_ERR_FATAL; |
3699 | goto end; | |
2f77fc4b DG |
3700 | } |
3701 | ||
53e367f9 JG |
3702 | channel_exts = ((void *) *channels) + |
3703 | (nb_chan * sizeof(struct lttng_channel)); | |
d449df4a MD |
3704 | ret = list_lttng_channels(domain, session, *channels, channel_exts); |
3705 | if (ret != LTTNG_OK) { | |
3706 | free(*channels); | |
3707 | *channels = NULL; | |
3708 | goto end; | |
3709 | } | |
53e367f9 JG |
3710 | } else { |
3711 | *channels = NULL; | |
2f77fc4b DG |
3712 | } |
3713 | ||
53e367f9 JG |
3714 | ret = payload_size; |
3715 | end: | |
3716 | return ret; | |
2f77fc4b DG |
3717 | } |
3718 | ||
3719 | /* | |
3720 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3721 | */ | |
56a37563 JG |
3722 | ssize_t cmd_list_events(enum lttng_domain_type domain, |
3723 | struct ltt_session *session, char *channel_name, | |
b4e3ceb9 | 3724 | struct lttng_event **events, size_t *total_size) |
2f77fc4b DG |
3725 | { |
3726 | int ret = 0; | |
3727 | ssize_t nb_event = 0; | |
3728 | ||
3729 | switch (domain) { | |
3730 | case LTTNG_DOMAIN_KERNEL: | |
3731 | if (session->kernel_session != NULL) { | |
3732 | nb_event = list_lttng_kernel_events(channel_name, | |
b4e3ceb9 PP |
3733 | session->kernel_session, events, |
3734 | total_size); | |
2f77fc4b DG |
3735 | } |
3736 | break; | |
3737 | case LTTNG_DOMAIN_UST: | |
3738 | { | |
3739 | if (session->ust_session != NULL) { | |
3740 | nb_event = list_lttng_ust_global_events(channel_name, | |
b4e3ceb9 PP |
3741 | &session->ust_session->domain_global, events, |
3742 | total_size); | |
2f77fc4b DG |
3743 | } |
3744 | break; | |
3745 | } | |
5cdb6027 | 3746 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 3747 | case LTTNG_DOMAIN_JUL: |
0e115563 | 3748 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 3749 | if (session->ust_session) { |
fefd409b DG |
3750 | struct lttng_ht_iter iter; |
3751 | struct agent *agt; | |
3752 | ||
b11feea5 | 3753 | rcu_read_lock(); |
fefd409b DG |
3754 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
3755 | &iter.iter, agt, node.node) { | |
1dfd9906 JG |
3756 | if (agt->domain == domain) { |
3757 | nb_event = list_lttng_agent_events( | |
b4e3ceb9 PP |
3758 | agt, events, |
3759 | total_size); | |
1dfd9906 JG |
3760 | break; |
3761 | } | |
fefd409b | 3762 | } |
b11feea5 | 3763 | rcu_read_unlock(); |
3c6a091f DG |
3764 | } |
3765 | break; | |
2f77fc4b | 3766 | default: |
f73fabfd | 3767 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3768 | goto error; |
3769 | } | |
3770 | ||
f73fabfd | 3771 | return nb_event; |
2f77fc4b DG |
3772 | |
3773 | error: | |
f73fabfd DG |
3774 | /* Return negative value to differentiate return code */ |
3775 | return -ret; | |
2f77fc4b DG |
3776 | } |
3777 | ||
3778 | /* | |
3779 | * Using the session list, filled a lttng_session array to send back to the | |
3780 | * client for session listing. | |
3781 | * | |
3782 | * The session list lock MUST be acquired before calling this function. Use | |
3783 | * session_lock_list() and session_unlock_list(). | |
3784 | */ | |
b178f53e JG |
3785 | void cmd_list_lttng_sessions(struct lttng_session *sessions, |
3786 | size_t session_count, uid_t uid, gid_t gid) | |
2f77fc4b DG |
3787 | { |
3788 | int ret; | |
3789 | unsigned int i = 0; | |
3790 | struct ltt_session *session; | |
3791 | struct ltt_session_list *list = session_get_list(); | |
b178f53e JG |
3792 | struct lttng_session_extended *extended = |
3793 | (typeof(extended)) (&sessions[session_count]); | |
2f77fc4b DG |
3794 | |
3795 | DBG("Getting all available session for UID %d GID %d", | |
3796 | uid, gid); | |
3797 | /* | |
3798 | * Iterate over session list and append data after the control struct in | |
3799 | * the buffer. | |
3800 | */ | |
3801 | cds_list_for_each_entry(session, &list->head, list) { | |
e32d7f27 JG |
3802 | if (!session_get(session)) { |
3803 | continue; | |
3804 | } | |
2f77fc4b DG |
3805 | /* |
3806 | * Only list the sessions the user can control. | |
3807 | */ | |
e32d7f27 JG |
3808 | if (!session_access_ok(session, uid, gid) || |
3809 | session->destroyed) { | |
3810 | session_put(session); | |
2f77fc4b DG |
3811 | continue; |
3812 | } | |
3813 | ||
3814 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3815 | struct ltt_ust_session *usess = session->ust_session; | |
3816 | ||
3817 | if (session->consumer->type == CONSUMER_DST_NET || | |
3818 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
3819 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
3820 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 3821 | sizeof(sessions[i].path), session); |
2f77fc4b | 3822 | } else { |
dec56f6c | 3823 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
366a9222 | 3824 | session->consumer->dst.session_root_path); |
2f77fc4b DG |
3825 | } |
3826 | if (ret < 0) { | |
3827 | PERROR("snprintf session path"); | |
e32d7f27 | 3828 | session_put(session); |
2f77fc4b DG |
3829 | continue; |
3830 | } | |
3831 | ||
3832 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
3833 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 3834 | sessions[i].enabled = session->active; |
2cbf8fed | 3835 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 3836 | sessions[i].live_timer_interval = session->live_timer; |
b178f53e JG |
3837 | extended[i].creation_time.value = (uint64_t) session->creation_time; |
3838 | extended[i].creation_time.is_set = 1; | |
2f77fc4b | 3839 | i++; |
e32d7f27 | 3840 | session_put(session); |
2f77fc4b DG |
3841 | } |
3842 | } | |
3843 | ||
806e2684 | 3844 | /* |
6d805429 | 3845 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 3846 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 3847 | */ |
6d805429 | 3848 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
3849 | { |
3850 | int ret; | |
3851 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3852 | struct ltt_ust_session *usess = session->ust_session; | |
3853 | ||
3854 | assert(session); | |
3855 | ||
5c408ad8 JD |
3856 | DBG("Data pending for session %s", session->name); |
3857 | ||
806e2684 | 3858 | /* Session MUST be stopped to ask for data availability. */ |
8382cf6f | 3859 | if (session->active) { |
806e2684 DG |
3860 | ret = LTTNG_ERR_SESSION_STARTED; |
3861 | goto error; | |
3a89d11a DG |
3862 | } else { |
3863 | /* | |
3864 | * If stopped, just make sure we've started before else the above call | |
3865 | * will always send that there is data pending. | |
3866 | * | |
3867 | * The consumer assumes that when the data pending command is received, | |
3868 | * the trace has been started before or else no output data is written | |
3869 | * by the streams which is a condition for data pending. So, this is | |
3870 | * *VERY* important that we don't ask the consumer before a start | |
3871 | * trace. | |
3872 | */ | |
8382cf6f | 3873 | if (!session->has_been_started) { |
3a89d11a DG |
3874 | ret = 0; |
3875 | goto error; | |
3876 | } | |
806e2684 DG |
3877 | } |
3878 | ||
92816cc3 JG |
3879 | /* A rotation is still pending, we have to wait. */ |
3880 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { | |
5c408ad8 JD |
3881 | DBG("Rotate still pending for session %s", session->name); |
3882 | ret = 1; | |
3883 | goto error; | |
3884 | } | |
3885 | ||
806e2684 | 3886 | if (ksess && ksess->consumer) { |
6d805429 DG |
3887 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
3888 | if (ret == 1) { | |
806e2684 DG |
3889 | /* Data is still being extracted for the kernel. */ |
3890 | goto error; | |
3891 | } | |
3892 | } | |
3893 | ||
3894 | if (usess && usess->consumer) { | |
6d805429 DG |
3895 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
3896 | if (ret == 1) { | |
806e2684 DG |
3897 | /* Data is still being extracted for the kernel. */ |
3898 | goto error; | |
3899 | } | |
3900 | } | |
3901 | ||
3902 | /* Data is ready to be read by a viewer */ | |
6d805429 | 3903 | ret = 0; |
806e2684 DG |
3904 | |
3905 | error: | |
3906 | return ret; | |
3907 | } | |
3908 | ||
6dc3064a DG |
3909 | /* |
3910 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
3911 | * | |
3912 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3913 | */ | |
3914 | int cmd_snapshot_add_output(struct ltt_session *session, | |
df4f5a87 | 3915 | const struct lttng_snapshot_output *output, uint32_t *id) |
6dc3064a DG |
3916 | { |
3917 | int ret; | |
3918 | struct snapshot_output *new_output; | |
3919 | ||
3920 | assert(session); | |
3921 | assert(output); | |
3922 | ||
3923 | DBG("Cmd snapshot add output for session %s", session->name); | |
3924 | ||
3925 | /* | |
903ef685 | 3926 | * Can't create an output if the session is not set in no-output mode. |
6dc3064a DG |
3927 | */ |
3928 | if (session->output_traces) { | |
903ef685 | 3929 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3930 | goto error; |
3931 | } | |
3932 | ||
54213acc JG |
3933 | if (session->has_non_mmap_channel) { |
3934 | ret = LTTNG_ERR_SNAPSHOT_UNSUPPORTED; | |
3935 | goto error; | |
3936 | } | |
3937 | ||
6dc3064a DG |
3938 | /* Only one output is allowed until we have the "tee" feature. */ |
3939 | if (session->snapshot.nb_output == 1) { | |
3940 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
3941 | goto error; | |
3942 | } | |
3943 | ||
3944 | new_output = snapshot_output_alloc(); | |
3945 | if (!new_output) { | |
3946 | ret = LTTNG_ERR_NOMEM; | |
3947 | goto error; | |
3948 | } | |
3949 | ||
b178f53e | 3950 | ret = snapshot_output_init(session, output->max_size, output->name, |
6dc3064a DG |
3951 | output->ctrl_url, output->data_url, session->consumer, new_output, |
3952 | &session->snapshot); | |
3953 | if (ret < 0) { | |
3954 | if (ret == -ENOMEM) { | |
3955 | ret = LTTNG_ERR_NOMEM; | |
3956 | } else { | |
3957 | ret = LTTNG_ERR_INVALID; | |
3958 | } | |
3959 | goto free_error; | |
3960 | } | |
3961 | ||
6dc3064a DG |
3962 | rcu_read_lock(); |
3963 | snapshot_add_output(&session->snapshot, new_output); | |
3964 | if (id) { | |
3965 | *id = new_output->id; | |
3966 | } | |
3967 | rcu_read_unlock(); | |
3968 | ||
3969 | return LTTNG_OK; | |
3970 | ||
3971 | free_error: | |
3972 | snapshot_output_destroy(new_output); | |
3973 | error: | |
3974 | return ret; | |
3975 | } | |
3976 | ||
3977 | /* | |
3978 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
3979 | * | |
3980 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3981 | */ | |
3982 | int cmd_snapshot_del_output(struct ltt_session *session, | |
df4f5a87 | 3983 | const struct lttng_snapshot_output *output) |
6dc3064a DG |
3984 | { |
3985 | int ret; | |
eb240553 | 3986 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
3987 | |
3988 | assert(session); | |
3989 | assert(output); | |
3990 | ||
6dc3064a DG |
3991 | rcu_read_lock(); |
3992 | ||
3993 | /* | |
d3f14b8a MD |
3994 | * Permission denied to create an output if the session is not |
3995 | * set in no output mode. | |
6dc3064a DG |
3996 | */ |
3997 | if (session->output_traces) { | |
903ef685 | 3998 | ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
3999 | goto error; |
4000 | } | |
4001 | ||
eb240553 DG |
4002 | if (output->id) { |
4003 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
4004 | session->name); | |
4005 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
4006 | } else if (*output->name != '\0') { | |
4007 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
4008 | session->name); | |
4009 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
4010 | } | |
6dc3064a DG |
4011 | if (!sout) { |
4012 | ret = LTTNG_ERR_INVALID; | |
4013 | goto error; | |
4014 | } | |
4015 | ||
4016 | snapshot_delete_output(&session->snapshot, sout); | |
4017 | snapshot_output_destroy(sout); | |
4018 | ret = LTTNG_OK; | |
4019 | ||
4020 | error: | |
4021 | rcu_read_unlock(); | |
4022 | return ret; | |
4023 | } | |
4024 | ||
4025 | /* | |
4026 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
4027 | * | |
4028 | * If no output is available, outputs is untouched and 0 is returned. | |
4029 | * | |
4030 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
4031 | */ | |
4032 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
4033 | struct lttng_snapshot_output **outputs) | |
4034 | { | |
4035 | int ret, idx = 0; | |
b223ca94 | 4036 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
4037 | struct lttng_ht_iter iter; |
4038 | struct snapshot_output *output; | |
4039 | ||
4040 | assert(session); | |
4041 | assert(outputs); | |
4042 | ||
4043 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
4044 | ||
4045 | /* | |
d3f14b8a MD |
4046 | * Permission denied to create an output if the session is not |
4047 | * set in no output mode. | |
6dc3064a DG |
4048 | */ |
4049 | if (session->output_traces) { | |
903ef685 JG |
4050 | ret = -LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
4051 | goto end; | |
6dc3064a DG |
4052 | } |
4053 | ||
4054 | if (session->snapshot.nb_output == 0) { | |
4055 | ret = 0; | |
903ef685 | 4056 | goto end; |
6dc3064a DG |
4057 | } |
4058 | ||
4059 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
4060 | if (!list) { | |
b223ca94 | 4061 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4062 | goto end; |
6dc3064a DG |
4063 | } |
4064 | ||
4065 | /* Copy list from session to the new list object. */ | |
b223ca94 | 4066 | rcu_read_lock(); |
6dc3064a DG |
4067 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
4068 | output, node.node) { | |
4069 | assert(output->consumer); | |
4070 | list[idx].id = output->id; | |
4071 | list[idx].max_size = output->max_size; | |
6ce22875 MD |
4072 | if (lttng_strncpy(list[idx].name, output->name, |
4073 | sizeof(list[idx].name))) { | |
4074 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4075 | goto error; |
6ce22875 | 4076 | } |
6dc3064a | 4077 | if (output->consumer->type == CONSUMER_DST_LOCAL) { |
6ce22875 | 4078 | if (lttng_strncpy(list[idx].ctrl_url, |
366a9222 | 4079 | output->consumer->dst.session_root_path, |
6ce22875 MD |
4080 | sizeof(list[idx].ctrl_url))) { |
4081 | ret = -LTTNG_ERR_INVALID; | |
903ef685 | 4082 | goto error; |
6ce22875 | 4083 | } |
6dc3064a DG |
4084 | } else { |
4085 | /* Control URI. */ | |
4086 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
4087 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
4088 | if (ret < 0) { | |
b223ca94 | 4089 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4090 | goto error; |
6dc3064a DG |
4091 | } |
4092 | ||
4093 | /* Data URI. */ | |
4094 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
4095 | list[idx].data_url, sizeof(list[idx].data_url)); | |
4096 | if (ret < 0) { | |
b223ca94 | 4097 | ret = -LTTNG_ERR_NOMEM; |
903ef685 | 4098 | goto error; |
6dc3064a DG |
4099 | } |
4100 | } | |
4101 | idx++; | |
4102 | } | |
4103 | ||
4104 | *outputs = list; | |
b223ca94 JG |
4105 | list = NULL; |
4106 | ret = session->snapshot.nb_output; | |
6dc3064a | 4107 | error: |
903ef685 | 4108 | rcu_read_unlock(); |
b223ca94 | 4109 | free(list); |
903ef685 | 4110 | end: |
b223ca94 | 4111 | return ret; |
6dc3064a DG |
4112 | } |
4113 | ||
93ec662e JD |
4114 | /* |
4115 | * Check if we can regenerate the metadata for this session. | |
4116 | * Only kernel, UST per-uid and non-live sessions are supported. | |
4117 | * | |
4118 | * Return 0 if the metadata can be generated, a LTTNG_ERR code otherwise. | |
4119 | */ | |
4120 | static | |
eded6438 | 4121 | int check_regenerate_metadata_support(struct ltt_session *session) |
93ec662e JD |
4122 | { |
4123 | int ret; | |
4124 | ||
4125 | assert(session); | |
4126 | ||
4127 | if (session->live_timer != 0) { | |
4128 | ret = LTTNG_ERR_LIVE_SESSION; | |
4129 | goto end; | |
4130 | } | |
4131 | if (!session->active) { | |
4132 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4133 | goto end; | |
4134 | } | |
4135 | if (session->ust_session) { | |
4136 | switch (session->ust_session->buffer_type) { | |
4137 | case LTTNG_BUFFER_PER_UID: | |
4138 | break; | |
4139 | case LTTNG_BUFFER_PER_PID: | |
4140 | ret = LTTNG_ERR_PER_PID_SESSION; | |
4141 | goto end; | |
4142 | default: | |
4143 | assert(0); | |
4144 | ret = LTTNG_ERR_UNK; | |
4145 | goto end; | |
4146 | } | |
4147 | } | |
4148 | if (session->consumer->type == CONSUMER_DST_NET && | |
4149 | session->consumer->relay_minor_version < 8) { | |
4150 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; | |
4151 | goto end; | |
4152 | } | |
4153 | ret = 0; | |
4154 | ||
4155 | end: | |
4156 | return ret; | |
4157 | } | |
4158 | ||
7802bae3 LL |
4159 | static |
4160 | int clear_metadata_file(int fd) | |
4161 | { | |
4162 | int ret; | |
a5df8828 | 4163 | off_t lseek_ret; |
7802bae3 | 4164 | |
a5df8828 GL |
4165 | lseek_ret = lseek(fd, 0, SEEK_SET); |
4166 | if (lseek_ret < 0) { | |
7802bae3 | 4167 | PERROR("lseek"); |
a5df8828 | 4168 | ret = -1; |
7802bae3 LL |
4169 | goto end; |
4170 | } | |
4171 | ||
4172 | ret = ftruncate(fd, 0); | |
4173 | if (ret < 0) { | |
4174 | PERROR("ftruncate"); | |
4175 | goto end; | |
4176 | } | |
4177 | ||
4178 | end: | |
4179 | return ret; | |
4180 | } | |
4181 | ||
93ec662e | 4182 | static |
eded6438 | 4183 | int ust_regenerate_metadata(struct ltt_ust_session *usess) |
93ec662e JD |
4184 | { |
4185 | int ret = 0; | |
4186 | struct buffer_reg_uid *uid_reg = NULL; | |
4187 | struct buffer_reg_session *session_reg = NULL; | |
4188 | ||
4189 | rcu_read_lock(); | |
4190 | cds_list_for_each_entry(uid_reg, &usess->buffer_reg_uid_list, lnode) { | |
4191 | struct ust_registry_session *registry; | |
4192 | struct ust_registry_channel *chan; | |
4193 | struct lttng_ht_iter iter_chan; | |
4194 | ||
4195 | session_reg = uid_reg->registry; | |
4196 | registry = session_reg->reg.ust; | |
4197 | ||
4198 | pthread_mutex_lock(®istry->lock); | |
4199 | registry->metadata_len_sent = 0; | |
4200 | memset(registry->metadata, 0, registry->metadata_alloc_len); | |
4201 | registry->metadata_len = 0; | |
4202 | registry->metadata_version++; | |
7802bae3 LL |
4203 | if (registry->metadata_fd > 0) { |
4204 | /* Clear the metadata file's content. */ | |
4205 | ret = clear_metadata_file(registry->metadata_fd); | |
4206 | if (ret) { | |
4207 | pthread_mutex_unlock(®istry->lock); | |
4208 | goto end; | |
4209 | } | |
4210 | } | |
4211 | ||
93ec662e JD |
4212 | ret = ust_metadata_session_statedump(registry, NULL, |
4213 | registry->major, registry->minor); | |
4214 | if (ret) { | |
4215 | pthread_mutex_unlock(®istry->lock); | |
4216 | ERR("Failed to generate session metadata (err = %d)", | |
4217 | ret); | |
4218 | goto end; | |
4219 | } | |
4220 | cds_lfht_for_each_entry(registry->channels->ht, &iter_chan.iter, | |
4221 | chan, node.node) { | |
4222 | struct ust_registry_event *event; | |
4223 | struct lttng_ht_iter iter_event; | |
4224 | ||
4225 | ret = ust_metadata_channel_statedump(registry, chan); | |
4226 | if (ret) { | |
4227 | pthread_mutex_unlock(®istry->lock); | |
4228 | ERR("Failed to generate channel metadata " | |
4229 | "(err = %d)", ret); | |
4230 | goto end; | |
4231 | } | |
4232 | cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter, | |
4233 | event, node.node) { | |
4234 | ret = ust_metadata_event_statedump(registry, | |
4235 | chan, event); | |
4236 | if (ret) { | |
4237 | pthread_mutex_unlock(®istry->lock); | |
4238 | ERR("Failed to generate event metadata " | |
4239 | "(err = %d)", ret); | |
4240 | goto end; | |
4241 | } | |
4242 | } | |
4243 | } | |
4244 | pthread_mutex_unlock(®istry->lock); | |
4245 | } | |
4246 | ||
4247 | end: | |
4248 | rcu_read_unlock(); | |
4249 | return ret; | |
4250 | } | |
4251 | ||
4252 | /* | |
eded6438 | 4253 | * Command LTTNG_REGENERATE_METADATA from the lttng-ctl library. |
93ec662e JD |
4254 | * |
4255 | * Ask the consumer to truncate the existing metadata file(s) and | |
4256 | * then regenerate the metadata. Live and per-pid sessions are not | |
4257 | * supported and return an error. | |
4258 | * | |
4259 | * Return 0 on success or else a LTTNG_ERR code. | |
4260 | */ | |
eded6438 | 4261 | int cmd_regenerate_metadata(struct ltt_session *session) |
93ec662e JD |
4262 | { |
4263 | int ret; | |
4264 | ||
4265 | assert(session); | |
4266 | ||
eded6438 | 4267 | ret = check_regenerate_metadata_support(session); |
93ec662e JD |
4268 | if (ret) { |
4269 | goto end; | |
4270 | } | |
4271 | ||
4272 | if (session->kernel_session) { | |
eded6438 | 4273 | ret = kernctl_session_regenerate_metadata( |
93ec662e JD |
4274 | session->kernel_session->fd); |
4275 | if (ret < 0) { | |
4276 | ERR("Failed to regenerate the kernel metadata"); | |
4277 | goto end; | |
4278 | } | |
4279 | } | |
4280 | ||
4281 | if (session->ust_session) { | |
eded6438 | 4282 | ret = ust_regenerate_metadata(session->ust_session); |
93ec662e JD |
4283 | if (ret < 0) { |
4284 | ERR("Failed to regenerate the UST metadata"); | |
4285 | goto end; | |
4286 | } | |
4287 | } | |
4288 | DBG("Cmd metadata regenerate for session %s", session->name); | |
4289 | ret = LTTNG_OK; | |
4290 | ||
4291 | end: | |
4292 | return ret; | |
4293 | } | |
4294 | ||
c2561365 JD |
4295 | /* |
4296 | * Command LTTNG_REGENERATE_STATEDUMP from the lttng-ctl library. | |
4297 | * | |
4298 | * Ask the tracer to regenerate a new statedump. | |
4299 | * | |
4300 | * Return 0 on success or else a LTTNG_ERR code. | |
4301 | */ | |
4302 | int cmd_regenerate_statedump(struct ltt_session *session) | |
4303 | { | |
4304 | int ret; | |
4305 | ||
4306 | assert(session); | |
4307 | ||
4308 | if (!session->active) { | |
4309 | ret = LTTNG_ERR_SESSION_NOT_STARTED; | |
4310 | goto end; | |
4311 | } | |
c2561365 JD |
4312 | |
4313 | if (session->kernel_session) { | |
4314 | ret = kernctl_session_regenerate_statedump( | |
4315 | session->kernel_session->fd); | |
4316 | /* | |
4317 | * Currently, the statedump in kernel can only fail if out | |
4318 | * of memory. | |
4319 | */ | |
4320 | if (ret < 0) { | |
4321 | if (ret == -ENOMEM) { | |
4322 | ret = LTTNG_ERR_REGEN_STATEDUMP_NOMEM; | |
4323 | } else { | |
4324 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4325 | } | |
4326 | ERR("Failed to regenerate the kernel statedump"); | |
4327 | goto end; | |
4328 | } | |
4329 | } | |
4330 | ||
4331 | if (session->ust_session) { | |
4332 | ret = ust_app_regenerate_statedump_all(session->ust_session); | |
4333 | /* | |
4334 | * Currently, the statedump in UST always returns 0. | |
4335 | */ | |
4336 | if (ret < 0) { | |
4337 | ret = LTTNG_ERR_REGEN_STATEDUMP_FAIL; | |
4338 | ERR("Failed to regenerate the UST statedump"); | |
4339 | goto end; | |
4340 | } | |
4341 | } | |
4342 | DBG("Cmd regenerate statedump for session %s", session->name); | |
4343 | ret = LTTNG_OK; | |
4344 | ||
4345 | end: | |
4346 | return ret; | |
4347 | } | |
4348 | ||
b0880ae5 JG |
4349 | int cmd_register_trigger(struct command_ctx *cmd_ctx, int sock, |
4350 | struct notification_thread_handle *notification_thread) | |
4351 | { | |
4352 | int ret; | |
4353 | size_t trigger_len; | |
4354 | ssize_t sock_recv_len; | |
4355 | struct lttng_trigger *trigger = NULL; | |
c0a66c84 | 4356 | struct lttng_payload trigger_payload; |
b0880ae5 | 4357 | |
c0a66c84 | 4358 | lttng_payload_init(&trigger_payload); |
b0880ae5 | 4359 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; |
c0a66c84 JG |
4360 | ret = lttng_dynamic_buffer_set_size( |
4361 | &trigger_payload.buffer, trigger_len); | |
b0880ae5 JG |
4362 | if (ret) { |
4363 | ret = LTTNG_ERR_NOMEM; | |
4364 | goto end; | |
4365 | } | |
4366 | ||
c0a66c84 JG |
4367 | sock_recv_len = lttcomm_recv_unix_sock( |
4368 | sock, trigger_payload.buffer.data, trigger_len); | |
b0880ae5 JG |
4369 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { |
4370 | ERR("Failed to receive \"register trigger\" command payload"); | |
4371 | /* TODO: should this be a new error enum ? */ | |
4372 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4373 | goto end; | |
4374 | } | |
4375 | ||
c0a66c84 JG |
4376 | { |
4377 | struct lttng_payload_view view = | |
4378 | lttng_payload_view_from_payload( | |
4379 | &trigger_payload, 0, -1); | |
4380 | ||
4381 | if (lttng_trigger_create_from_payload(&view, &trigger) != | |
4382 | trigger_len) { | |
4383 | ERR("Invalid trigger payload received in \"register trigger\" command"); | |
4384 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4385 | goto end; | |
4386 | } | |
b0880ae5 JG |
4387 | } |
4388 | ||
4389 | ret = notification_thread_command_register_trigger(notification_thread, | |
4390 | trigger); | |
587f9fd0 JG |
4391 | /* Ownership of trigger was transferred. */ |
4392 | trigger = NULL; | |
b0880ae5 | 4393 | end: |
587f9fd0 | 4394 | lttng_trigger_destroy(trigger); |
c0a66c84 | 4395 | lttng_payload_reset(&trigger_payload); |
b0880ae5 JG |
4396 | return ret; |
4397 | } | |
4398 | ||
4399 | int cmd_unregister_trigger(struct command_ctx *cmd_ctx, int sock, | |
4400 | struct notification_thread_handle *notification_thread) | |
4401 | { | |
4402 | int ret; | |
4403 | size_t trigger_len; | |
4404 | ssize_t sock_recv_len; | |
4405 | struct lttng_trigger *trigger = NULL; | |
c0a66c84 | 4406 | struct lttng_payload trigger_payload; |
b0880ae5 | 4407 | |
c0a66c84 | 4408 | lttng_payload_init(&trigger_payload); |
b0880ae5 | 4409 | trigger_len = (size_t) cmd_ctx->lsm->u.trigger.length; |
c0a66c84 JG |
4410 | ret = lttng_dynamic_buffer_set_size( |
4411 | &trigger_payload.buffer, trigger_len); | |
b0880ae5 JG |
4412 | if (ret) { |
4413 | ret = LTTNG_ERR_NOMEM; | |
4414 | goto end; | |
4415 | } | |
4416 | ||
c0a66c84 JG |
4417 | sock_recv_len = lttcomm_recv_unix_sock( |
4418 | sock, trigger_payload.buffer.data, trigger_len); | |
b0880ae5 JG |
4419 | if (sock_recv_len < 0 || sock_recv_len != trigger_len) { |
4420 | ERR("Failed to receive \"unregister trigger\" command payload"); | |
4421 | /* TODO: should this be a new error enum ? */ | |
4422 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4423 | goto end; | |
4424 | } | |
4425 | ||
c0a66c84 JG |
4426 | { |
4427 | struct lttng_payload_view view = | |
4428 | lttng_payload_view_from_payload( | |
4429 | &trigger_payload, 0, -1); | |
4430 | ||
4431 | if (lttng_trigger_create_from_payload(&view, &trigger) != | |
4432 | trigger_len) { | |
4433 | ERR("Invalid trigger payload received in \"unregister trigger\" command"); | |
4434 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
4435 | goto end; | |
4436 | } | |
b0880ae5 JG |
4437 | } |
4438 | ||
4439 | ret = notification_thread_command_unregister_trigger(notification_thread, | |
4440 | trigger); | |
4441 | end: | |
587f9fd0 | 4442 | lttng_trigger_destroy(trigger); |
c0a66c84 | 4443 | lttng_payload_reset(&trigger_payload); |
b0880ae5 JG |
4444 | return ret; |
4445 | } | |
4446 | ||
6dc3064a DG |
4447 | /* |
4448 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
4449 | * snapshot output is *not* set with a remote destination. | |
4450 | * | |
9a654598 | 4451 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4452 | */ |
9a654598 | 4453 | static enum lttng_error_code set_relayd_for_snapshot( |
348a81dc | 4454 | struct consumer_output *output, |
fb9a95c4 | 4455 | const struct ltt_session *session) |
6dc3064a | 4456 | { |
9a654598 | 4457 | enum lttng_error_code status = LTTNG_OK; |
6dc3064a DG |
4458 | struct lttng_ht_iter iter; |
4459 | struct consumer_socket *socket; | |
1e791a74 | 4460 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; |
6fa5fe7c | 4461 | const char *base_path; |
6dc3064a | 4462 | |
348a81dc | 4463 | assert(output); |
6dc3064a DG |
4464 | assert(session); |
4465 | ||
4466 | DBG2("Set relayd object from snapshot output"); | |
4467 | ||
1e791a74 | 4468 | if (session->current_trace_chunk) { |
348a81dc JG |
4469 | enum lttng_trace_chunk_status chunk_status = |
4470 | lttng_trace_chunk_get_id( | |
4471 | session->current_trace_chunk, | |
4472 | ¤t_chunk_id.value); | |
1e791a74 | 4473 | |
348a81dc | 4474 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK) { |
1e791a74 JG |
4475 | current_chunk_id.is_set = true; |
4476 | } else { | |
4477 | ERR("Failed to get current trace chunk id"); | |
4478 | status = LTTNG_ERR_UNK; | |
4479 | goto error; | |
4480 | } | |
4481 | } | |
4482 | ||
6dc3064a | 4483 | /* Ignore if snapshot consumer output is not network. */ |
348a81dc | 4484 | if (output->type != CONSUMER_DST_NET) { |
6dc3064a DG |
4485 | goto error; |
4486 | } | |
4487 | ||
6fa5fe7c MD |
4488 | /* |
4489 | * The snapshot record URI base path overrides the session | |
4490 | * base path. | |
4491 | */ | |
4492 | if (output->dst.net.control.subdir[0] != '\0') { | |
4493 | base_path = output->dst.net.control.subdir; | |
4494 | } else { | |
4495 | base_path = session->base_path; | |
4496 | } | |
4497 | ||
6dc3064a DG |
4498 | /* |
4499 | * For each consumer socket, create and send the relayd object of the | |
4500 | * snapshot output. | |
4501 | */ | |
4502 | rcu_read_lock(); | |
348a81dc | 4503 | cds_lfht_for_each_entry(output->socks->ht, &iter.iter, |
5eecee74 | 4504 | socket, node.node) { |
ecd0f96d | 4505 | pthread_mutex_lock(socket->lock); |
9a654598 | 4506 | status = send_consumer_relayd_sockets(0, session->id, |
348a81dc | 4507 | output, socket, |
d3e2ba59 | 4508 | session->name, session->hostname, |
6fa5fe7c | 4509 | base_path, |
1e791a74 | 4510 | session->live_timer, |
db1da059 | 4511 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, |
46ef2188 MD |
4512 | session->creation_time, |
4513 | session->name_contains_creation_time); | |
ecd0f96d | 4514 | pthread_mutex_unlock(socket->lock); |
9a654598 | 4515 | if (status != LTTNG_OK) { |
6dc3064a DG |
4516 | rcu_read_unlock(); |
4517 | goto error; | |
4518 | } | |
4519 | } | |
4520 | rcu_read_unlock(); | |
4521 | ||
4522 | error: | |
9a654598 | 4523 | return status; |
6dc3064a DG |
4524 | } |
4525 | ||
4526 | /* | |
4527 | * Record a kernel snapshot. | |
4528 | * | |
fac41e72 | 4529 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a | 4530 | */ |
fb9a95c4 JG |
4531 | static enum lttng_error_code record_kernel_snapshot( |
4532 | struct ltt_kernel_session *ksess, | |
348a81dc | 4533 | const struct consumer_output *output, |
fb9a95c4 | 4534 | const struct ltt_session *session, |
d07ceecd | 4535 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a | 4536 | { |
9a654598 | 4537 | enum lttng_error_code status; |
6dc3064a DG |
4538 | |
4539 | assert(ksess); | |
4540 | assert(output); | |
4541 | assert(session); | |
4542 | ||
348a81dc JG |
4543 | status = kernel_snapshot_record( |
4544 | ksess, output, wait, nb_packets_per_stream); | |
9a654598 | 4545 | return status; |
6dc3064a DG |
4546 | } |
4547 | ||
4548 | /* | |
4549 | * Record a UST snapshot. | |
4550 | * | |
9a654598 | 4551 | * Returns LTTNG_OK on success or a LTTNG_ERR error code. |
6dc3064a | 4552 | */ |
9a654598 | 4553 | static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess, |
348a81dc JG |
4554 | const struct consumer_output *output, |
4555 | const struct ltt_session *session, | |
4556 | int wait, uint64_t nb_packets_per_stream) | |
6dc3064a | 4557 | { |
9a654598 | 4558 | enum lttng_error_code status; |
6dc3064a DG |
4559 | |
4560 | assert(usess); | |
4561 | assert(output); | |
4562 | assert(session); | |
4563 | ||
348a81dc JG |
4564 | status = ust_app_snapshot_record( |
4565 | usess, output, wait, nb_packets_per_stream); | |
9a654598 | 4566 | return status; |
6dc3064a DG |
4567 | } |
4568 | ||
d07ceecd | 4569 | static |
fb9a95c4 JG |
4570 | uint64_t get_session_size_one_more_packet_per_stream( |
4571 | const struct ltt_session *session, uint64_t cur_nr_packets) | |
68808f4e | 4572 | { |
d07ceecd | 4573 | uint64_t tot_size = 0; |
68808f4e DG |
4574 | |
4575 | if (session->kernel_session) { | |
4576 | struct ltt_kernel_channel *chan; | |
fb9a95c4 JG |
4577 | const struct ltt_kernel_session *ksess = |
4578 | session->kernel_session; | |
68808f4e | 4579 | |
68808f4e | 4580 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
4581 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
4582 | /* | |
4583 | * Don't take channel into account if we | |
4584 | * already grab all its packets. | |
4585 | */ | |
4586 | continue; | |
68808f4e | 4587 | } |
d07ceecd MD |
4588 | tot_size += chan->channel->attr.subbuf_size |
4589 | * chan->stream_count; | |
68808f4e DG |
4590 | } |
4591 | } | |
4592 | ||
4593 | if (session->ust_session) { | |
fb9a95c4 | 4594 | const struct ltt_ust_session *usess = session->ust_session; |
68808f4e | 4595 | |
d07ceecd MD |
4596 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
4597 | cur_nr_packets); | |
68808f4e DG |
4598 | } |
4599 | ||
d07ceecd | 4600 | return tot_size; |
68808f4e DG |
4601 | } |
4602 | ||
5c786ded | 4603 | /* |
d07ceecd MD |
4604 | * Calculate the number of packets we can grab from each stream that |
4605 | * fits within the overall snapshot max size. | |
4606 | * | |
4607 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
4608 | * the number of packets per stream. | |
4609 | * | |
4610 | * TODO: this approach is not perfect: we consider the worse case | |
4611 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
4612 | * better if we do this calculation while we actually grab the packet | |
4613 | * content: we would know how much padding we don't actually store into | |
4614 | * the file. | |
4615 | * | |
4616 | * This algorithm is currently bounded by the number of packets per | |
4617 | * stream. | |
4618 | * | |
4619 | * Since we call this algorithm before actually grabbing the data, it's | |
4620 | * an approximation: for instance, applications could appear/disappear | |
4621 | * in between this call and actually grabbing data. | |
5c786ded | 4622 | */ |
d07ceecd | 4623 | static |
fb9a95c4 JG |
4624 | int64_t get_session_nb_packets_per_stream(const struct ltt_session *session, |
4625 | uint64_t max_size) | |
5c786ded | 4626 | { |
d07ceecd MD |
4627 | int64_t size_left; |
4628 | uint64_t cur_nb_packets = 0; | |
5c786ded | 4629 | |
d07ceecd MD |
4630 | if (!max_size) { |
4631 | return 0; /* Infinite */ | |
5c786ded JD |
4632 | } |
4633 | ||
d07ceecd MD |
4634 | size_left = max_size; |
4635 | for (;;) { | |
4636 | uint64_t one_more_packet_tot_size; | |
5c786ded | 4637 | |
fb9a95c4 JG |
4638 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream( |
4639 | session, cur_nb_packets); | |
d07ceecd MD |
4640 | if (!one_more_packet_tot_size) { |
4641 | /* We are already grabbing all packets. */ | |
4642 | break; | |
4643 | } | |
4644 | size_left -= one_more_packet_tot_size; | |
4645 | if (size_left < 0) { | |
4646 | break; | |
4647 | } | |
4648 | cur_nb_packets++; | |
5c786ded | 4649 | } |
aecf2da5 | 4650 | if (!cur_nb_packets && size_left != max_size) { |
d07ceecd MD |
4651 | /* Not enough room to grab one packet of each stream, error. */ |
4652 | return -1; | |
4653 | } | |
4654 | return cur_nb_packets; | |
5c786ded JD |
4655 | } |
4656 | ||
fb9a95c4 | 4657 | static |
d2956687 | 4658 | enum lttng_error_code snapshot_record(struct ltt_session *session, |
fb9a95c4 JG |
4659 | const struct snapshot_output *snapshot_output, int wait) |
4660 | { | |
4661 | int64_t nb_packets_per_stream; | |
d2956687 | 4662 | char snapshot_chunk_name[LTTNG_NAME_MAX]; |
348a81dc JG |
4663 | int ret; |
4664 | enum lttng_error_code ret_code = LTTNG_OK; | |
d2956687 | 4665 | struct lttng_trace_chunk *snapshot_trace_chunk; |
348a81dc JG |
4666 | struct consumer_output *original_ust_consumer_output = NULL; |
4667 | struct consumer_output *original_kernel_consumer_output = NULL; | |
4668 | struct consumer_output *snapshot_ust_consumer_output = NULL; | |
4669 | struct consumer_output *snapshot_kernel_consumer_output = NULL; | |
d2956687 | 4670 | |
348a81dc | 4671 | ret = snprintf(snapshot_chunk_name, sizeof(snapshot_chunk_name), |
d2956687 JG |
4672 | "%s-%s-%" PRIu64, |
4673 | snapshot_output->name, | |
4674 | snapshot_output->datetime, | |
4675 | snapshot_output->nb_snapshot); | |
348a81dc | 4676 | if (ret < 0 || ret >= sizeof(snapshot_chunk_name)) { |
d2956687 | 4677 | ERR("Failed to format snapshot name"); |
348a81dc JG |
4678 | ret_code = LTTNG_ERR_INVALID; |
4679 | goto error; | |
d2956687 JG |
4680 | } |
4681 | DBG("Recording snapshot \"%s\" for session \"%s\" with chunk name \"%s\"", | |
4682 | snapshot_output->name, session->name, | |
4683 | snapshot_chunk_name); | |
348a81dc JG |
4684 | if (!session->kernel_session && !session->ust_session) { |
4685 | ERR("Failed to record snapshot as no channels exist"); | |
4686 | ret_code = LTTNG_ERR_NO_CHANNEL; | |
4687 | goto error; | |
4688 | } | |
4689 | ||
4690 | if (session->kernel_session) { | |
4691 | original_kernel_consumer_output = | |
4692 | session->kernel_session->consumer; | |
4693 | snapshot_kernel_consumer_output = | |
4694 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4695 | strcpy(snapshot_kernel_consumer_output->chunk_path, |
4696 | snapshot_chunk_name); | |
348a81dc JG |
4697 | ret = consumer_copy_sockets(snapshot_kernel_consumer_output, |
4698 | original_kernel_consumer_output); | |
4699 | if (ret < 0) { | |
4700 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4701 | ret_code = LTTNG_ERR_NOMEM; | |
4702 | goto error; | |
4703 | } | |
4704 | ret_code = set_relayd_for_snapshot( | |
4705 | snapshot_kernel_consumer_output, session); | |
4706 | if (ret_code != LTTNG_OK) { | |
4707 | ERR("Failed to setup relay daemon for kernel tracer snapshot"); | |
4708 | goto error; | |
4709 | } | |
4710 | session->kernel_session->consumer = | |
4711 | snapshot_kernel_consumer_output; | |
4712 | } | |
4713 | if (session->ust_session) { | |
4714 | original_ust_consumer_output = session->ust_session->consumer; | |
4715 | snapshot_ust_consumer_output = | |
4716 | consumer_copy_output(snapshot_output->consumer); | |
3b967712 MD |
4717 | strcpy(snapshot_ust_consumer_output->chunk_path, |
4718 | snapshot_chunk_name); | |
348a81dc JG |
4719 | ret = consumer_copy_sockets(snapshot_ust_consumer_output, |
4720 | original_ust_consumer_output); | |
4721 | if (ret < 0) { | |
4722 | ERR("Failed to copy consumer sockets from snapshot output configuration"); | |
4723 | ret_code = LTTNG_ERR_NOMEM; | |
4724 | goto error; | |
4725 | } | |
4726 | ret_code = set_relayd_for_snapshot( | |
4727 | snapshot_ust_consumer_output, session); | |
4728 | if (ret_code != LTTNG_OK) { | |
4729 | ERR("Failed to setup relay daemon for userspace tracer snapshot"); | |
4730 | goto error; | |
4731 | } | |
4732 | session->ust_session->consumer = | |
4733 | snapshot_ust_consumer_output; | |
4734 | } | |
4735 | ||
d2956687 | 4736 | snapshot_trace_chunk = session_create_new_trace_chunk(session, |
348a81dc JG |
4737 | snapshot_kernel_consumer_output ?: |
4738 | snapshot_ust_consumer_output, | |
4739 | consumer_output_get_base_path( | |
4740 | snapshot_output->consumer), | |
d2956687 JG |
4741 | snapshot_chunk_name); |
4742 | if (!snapshot_trace_chunk) { | |
348a81dc JG |
4743 | ERR("Failed to create temporary trace chunk to record a snapshot of session \"%s\"", |
4744 | session->name); | |
4745 | ret_code = LTTNG_ERR_CREATE_DIR_FAIL; | |
4746 | goto error; | |
d2956687 JG |
4747 | } |
4748 | assert(!session->current_trace_chunk); | |
4749 | ret = session_set_trace_chunk(session, snapshot_trace_chunk, NULL); | |
4750 | lttng_trace_chunk_put(snapshot_trace_chunk); | |
4751 | snapshot_trace_chunk = NULL; | |
4752 | if (ret) { | |
348a81dc JG |
4753 | ERR("Failed to set temporary trace chunk to record a snapshot of session \"%s\"", |
4754 | session->name); | |
4755 | ret_code = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
4756 | goto error; | |
d2956687 | 4757 | } |
fb9a95c4 JG |
4758 | |
4759 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
4760 | snapshot_output->max_size); | |
4761 | if (nb_packets_per_stream < 0) { | |
348a81dc | 4762 | ret_code = LTTNG_ERR_MAX_SIZE_INVALID; |
5151d412 | 4763 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4764 | } |
4765 | ||
4766 | if (session->kernel_session) { | |
348a81dc JG |
4767 | ret_code = record_kernel_snapshot(session->kernel_session, |
4768 | snapshot_kernel_consumer_output, session, | |
fb9a95c4 | 4769 | wait, nb_packets_per_stream); |
348a81dc | 4770 | if (ret_code != LTTNG_OK) { |
5151d412 | 4771 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4772 | } |
4773 | } | |
4774 | ||
4775 | if (session->ust_session) { | |
348a81dc JG |
4776 | ret_code = record_ust_snapshot(session->ust_session, |
4777 | snapshot_ust_consumer_output, session, | |
fb9a95c4 | 4778 | wait, nb_packets_per_stream); |
348a81dc | 4779 | if (ret_code != LTTNG_OK) { |
5151d412 | 4780 | goto error_close_trace_chunk; |
fb9a95c4 JG |
4781 | } |
4782 | } | |
d2956687 | 4783 | |
5151d412 | 4784 | error_close_trace_chunk: |
dbfee52c MD |
4785 | if (session_set_trace_chunk(session, NULL, &snapshot_trace_chunk)) { |
4786 | ERR("Failed to release the current trace chunk of session \"%s\"", | |
4787 | session->name); | |
4788 | ret_code = LTTNG_ERR_UNK; | |
4789 | } | |
4790 | ||
4791 | if (session_close_trace_chunk(session, snapshot_trace_chunk, | |
343defc2 | 4792 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) { |
d2956687 JG |
4793 | /* |
4794 | * Don't goto end; make sure the chunk is closed for the session | |
4795 | * to allow future snapshots. | |
4796 | */ | |
4797 | ERR("Failed to close snapshot trace chunk of session \"%s\"", | |
4798 | session->name); | |
348a81dc | 4799 | ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; |
d2956687 | 4800 | } |
348a81dc JG |
4801 | error: |
4802 | if (original_ust_consumer_output) { | |
4803 | session->ust_session->consumer = original_ust_consumer_output; | |
4804 | } | |
4805 | if (original_kernel_consumer_output) { | |
4806 | session->kernel_session->consumer = | |
4807 | original_kernel_consumer_output; | |
4808 | } | |
4809 | consumer_output_put(snapshot_ust_consumer_output); | |
4810 | consumer_output_put(snapshot_kernel_consumer_output); | |
4811 | return ret_code; | |
fb9a95c4 JG |
4812 | } |
4813 | ||
6dc3064a DG |
4814 | /* |
4815 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
4816 | * | |
4817 | * The wait parameter is ignored so this call always wait for the snapshot to | |
4818 | * complete before returning. | |
4819 | * | |
4820 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
4821 | */ | |
4822 | int cmd_snapshot_record(struct ltt_session *session, | |
df4f5a87 | 4823 | const struct lttng_snapshot_output *output, int wait) |
6dc3064a | 4824 | { |
9a654598 JG |
4825 | enum lttng_error_code cmd_ret = LTTNG_OK; |
4826 | int ret; | |
00e1dfc4 | 4827 | unsigned int snapshot_success = 0; |
10ba83fe | 4828 | char datetime[16]; |
2abe7969 | 4829 | struct snapshot_output *tmp_output = NULL; |
6dc3064a DG |
4830 | |
4831 | assert(session); | |
ba45d9f0 | 4832 | assert(output); |
6dc3064a DG |
4833 | |
4834 | DBG("Cmd snapshot record for session %s", session->name); | |
4835 | ||
10ba83fe JR |
4836 | /* Get the datetime for the snapshot output directory. */ |
4837 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", datetime, | |
4838 | sizeof(datetime)); | |
4839 | if (!ret) { | |
9a654598 | 4840 | cmd_ret = LTTNG_ERR_INVALID; |
10ba83fe JR |
4841 | goto error; |
4842 | } | |
4843 | ||
6dc3064a | 4844 | /* |
d3f14b8a MD |
4845 | * Permission denied to create an output if the session is not |
4846 | * set in no output mode. | |
6dc3064a DG |
4847 | */ |
4848 | if (session->output_traces) { | |
9a654598 | 4849 | cmd_ret = LTTNG_ERR_NOT_SNAPSHOT_SESSION; |
6dc3064a DG |
4850 | goto error; |
4851 | } | |
4852 | ||
4853 | /* The session needs to be started at least once. */ | |
8382cf6f | 4854 | if (!session->has_been_started) { |
9a654598 | 4855 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
6dc3064a DG |
4856 | goto error; |
4857 | } | |
4858 | ||
4859 | /* Use temporary output for the session. */ | |
ba45d9f0 | 4860 | if (*output->ctrl_url != '\0') { |
2abe7969 JG |
4861 | tmp_output = snapshot_output_alloc(); |
4862 | if (!tmp_output) { | |
4863 | cmd_ret = LTTNG_ERR_NOMEM; | |
4864 | goto error; | |
4865 | } | |
4866 | ||
b178f53e JG |
4867 | ret = snapshot_output_init(session, output->max_size, |
4868 | output->name, | |
4869 | output->ctrl_url, output->data_url, | |
4870 | session->consumer, | |
2abe7969 | 4871 | tmp_output, NULL); |
6dc3064a DG |
4872 | if (ret < 0) { |
4873 | if (ret == -ENOMEM) { | |
9a654598 | 4874 | cmd_ret = LTTNG_ERR_NOMEM; |
6dc3064a | 4875 | } else { |
9a654598 | 4876 | cmd_ret = LTTNG_ERR_INVALID; |
6dc3064a DG |
4877 | } |
4878 | goto error; | |
4879 | } | |
1bfe7328 | 4880 | /* Use the global session count for the temporary snapshot. */ |
2abe7969 | 4881 | tmp_output->nb_snapshot = session->snapshot.nb_snapshot; |
10ba83fe JR |
4882 | |
4883 | /* Use the global datetime */ | |
2abe7969 JG |
4884 | memcpy(tmp_output->datetime, datetime, sizeof(datetime)); |
4885 | cmd_ret = snapshot_record(session, tmp_output, wait); | |
fb9a95c4 | 4886 | if (cmd_ret != LTTNG_OK) { |
804c90a8 JR |
4887 | goto error; |
4888 | } | |
804c90a8 JR |
4889 | snapshot_success = 1; |
4890 | } else { | |
4891 | struct snapshot_output *sout; | |
4892 | struct lttng_ht_iter iter; | |
68808f4e | 4893 | |
804c90a8 JR |
4894 | rcu_read_lock(); |
4895 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
4896 | &iter.iter, sout, node.node) { | |
2abe7969 JG |
4897 | struct snapshot_output output_copy; |
4898 | ||
804c90a8 | 4899 | /* |
2abe7969 JG |
4900 | * Make a local copy of the output and override output |
4901 | * parameters with those provided as part of the | |
4902 | * command. | |
804c90a8 | 4903 | */ |
2abe7969 | 4904 | memcpy(&output_copy, sout, sizeof(output_copy)); |
1bfe7328 | 4905 | |
804c90a8 | 4906 | if (output->max_size != (uint64_t) -1ULL) { |
2abe7969 | 4907 | output_copy.max_size = output->max_size; |
6dc3064a | 4908 | } |
d07ceecd | 4909 | |
2abe7969 JG |
4910 | output_copy.nb_snapshot = session->snapshot.nb_snapshot; |
4911 | memcpy(output_copy.datetime, datetime, | |
4912 | sizeof(datetime)); | |
6dc3064a | 4913 | |
804c90a8 JR |
4914 | /* Use temporary name. */ |
4915 | if (*output->name != '\0') { | |
2abe7969 JG |
4916 | if (lttng_strncpy(output_copy.name, |
4917 | output->name, | |
4918 | sizeof(output_copy.name))) { | |
9a654598 | 4919 | cmd_ret = LTTNG_ERR_INVALID; |
cf3e357d MD |
4920 | rcu_read_unlock(); |
4921 | goto error; | |
4922 | } | |
804c90a8 | 4923 | } |
e1986656 | 4924 | |
2abe7969 | 4925 | cmd_ret = snapshot_record(session, &output_copy, wait); |
fb9a95c4 JG |
4926 | if (cmd_ret != LTTNG_OK) { |
4927 | rcu_read_unlock(); | |
4928 | goto error; | |
6dc3064a | 4929 | } |
804c90a8 | 4930 | snapshot_success = 1; |
6dc3064a | 4931 | } |
804c90a8 | 4932 | rcu_read_unlock(); |
6dc3064a DG |
4933 | } |
4934 | ||
1bfe7328 DG |
4935 | if (snapshot_success) { |
4936 | session->snapshot.nb_snapshot++; | |
b67578cb | 4937 | } else { |
9a654598 | 4938 | cmd_ret = LTTNG_ERR_SNAPSHOT_FAIL; |
1bfe7328 DG |
4939 | } |
4940 | ||
6dc3064a | 4941 | error: |
2abe7969 JG |
4942 | if (tmp_output) { |
4943 | snapshot_output_destroy(tmp_output); | |
4944 | } | |
9a654598 | 4945 | return cmd_ret; |
6dc3064a DG |
4946 | } |
4947 | ||
d7ba1388 MD |
4948 | /* |
4949 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
4950 | */ | |
4951 | int cmd_set_session_shm_path(struct ltt_session *session, | |
4952 | const char *shm_path) | |
4953 | { | |
4954 | /* Safety net */ | |
4955 | assert(session); | |
4956 | ||
4957 | /* | |
4958 | * Can only set shm path before session is started. | |
4959 | */ | |
4960 | if (session->has_been_started) { | |
4961 | return LTTNG_ERR_SESSION_STARTED; | |
4962 | } | |
4963 | ||
4964 | strncpy(session->shm_path, shm_path, | |
4965 | sizeof(session->shm_path)); | |
4966 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
4967 | ||
4968 | return 0; | |
4969 | } | |
4970 | ||
5c408ad8 JD |
4971 | /* |
4972 | * Command LTTNG_ROTATE_SESSION from the lttng-ctl library. | |
4973 | * | |
4974 | * Ask the consumer to rotate the session output directory. | |
4975 | * The session lock must be held. | |
4976 | * | |
d5a1b7aa | 4977 | * Returns LTTNG_OK on success or else a negative LTTng error code. |
5c408ad8 JD |
4978 | */ |
4979 | int cmd_rotate_session(struct ltt_session *session, | |
7fdbed1c | 4980 | struct lttng_rotate_session_return *rotate_return, |
343defc2 MD |
4981 | bool quiet_rotation, |
4982 | enum lttng_trace_chunk_command_type command) | |
5c408ad8 JD |
4983 | { |
4984 | int ret; | |
d2956687 | 4985 | uint64_t ongoing_rotation_chunk_id; |
d5a1b7aa | 4986 | enum lttng_error_code cmd_ret = LTTNG_OK; |
d2956687 JG |
4987 | struct lttng_trace_chunk *chunk_being_archived = NULL; |
4988 | struct lttng_trace_chunk *new_trace_chunk = NULL; | |
4989 | enum lttng_trace_chunk_status chunk_status; | |
3156892b JG |
4990 | bool failed_to_rotate = false; |
4991 | enum lttng_error_code rotation_fail_code = LTTNG_OK; | |
5c408ad8 JD |
4992 | |
4993 | assert(session); | |
4994 | ||
4995 | if (!session->has_been_started) { | |
d5a1b7aa | 4996 | cmd_ret = LTTNG_ERR_START_SESSION_ONCE; |
d68c9a04 | 4997 | goto end; |
5c408ad8 JD |
4998 | } |
4999 | ||
d48d65e1 MD |
5000 | /* |
5001 | * Explicit rotation is not supported for live sessions. | |
5002 | * However, live sessions can perform a quiet rotation on | |
5003 | * destroy. | |
5004 | * Rotation is not supported for snapshot traces (no output). | |
5005 | */ | |
5006 | if ((!quiet_rotation && session->live_timer) || | |
5007 | !session->output_traces) { | |
d5a1b7aa | 5008 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
d68c9a04 | 5009 | goto end; |
5c408ad8 JD |
5010 | } |
5011 | ||
d2956687 | 5012 | /* Unsupported feature in lttng-relayd before 2.11. */ |
070b6a86 | 5013 | if (!quiet_rotation && session->consumer->type == CONSUMER_DST_NET && |
5c408ad8 JD |
5014 | (session->consumer->relay_major_version == 2 && |
5015 | session->consumer->relay_minor_version < 11)) { | |
d5a1b7aa | 5016 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_RELAY; |
d68c9a04 | 5017 | goto end; |
5c408ad8 JD |
5018 | } |
5019 | ||
a40a503f MD |
5020 | /* Unsupported feature in lttng-modules before 2.8 (lack of sequence number). */ |
5021 | if (session->kernel_session && !kernel_supports_ring_buffer_packet_sequence_number()) { | |
5022 | cmd_ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE_KERNEL; | |
5023 | goto end; | |
5024 | } | |
5025 | ||
92816cc3 | 5026 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
92816cc3 JG |
5027 | DBG("Refusing to launch a rotation; a rotation is already in progress for session %s", |
5028 | session->name); | |
d5a1b7aa | 5029 | cmd_ret = LTTNG_ERR_ROTATION_PENDING; |
d68c9a04 | 5030 | goto end; |
5c408ad8 JD |
5031 | } |
5032 | ||
5033 | /* | |
5034 | * After a stop, we only allow one rotation to occur, the other ones are | |
5035 | * useless until a new start. | |
5036 | */ | |
5037 | if (session->rotated_after_last_stop) { | |
5038 | DBG("Session \"%s\" was already rotated after stop, refusing rotation", | |
5039 | session->name); | |
d5a1b7aa | 5040 | cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; |
d68c9a04 | 5041 | goto end; |
5c408ad8 | 5042 | } |
b02f5986 MD |
5043 | |
5044 | /* | |
5045 | * After a stop followed by a clear, disallow following rotations a they would | |
5046 | * generate empty chunks. | |
5047 | */ | |
5048 | if (session->cleared_after_last_stop) { | |
5049 | DBG("Session \"%s\" was already cleared after stop, refusing rotation", | |
5050 | session->name); | |
5051 | cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR; | |
5052 | goto end; | |
5053 | } | |
5054 | ||
d2956687 | 5055 | if (session->active) { |
348a81dc | 5056 | new_trace_chunk = session_create_new_trace_chunk(session, NULL, |
d2956687 JG |
5057 | NULL, NULL); |
5058 | if (!new_trace_chunk) { | |
5059 | cmd_ret = LTTNG_ERR_CREATE_DIR_FAIL; | |
5060 | goto error; | |
5c408ad8 | 5061 | } |
d2956687 | 5062 | } |
2961f09e | 5063 | |
3156892b JG |
5064 | /* |
5065 | * The current trace chunk becomes the chunk being archived. | |
5066 | * | |
5067 | * After this point, "chunk_being_archived" must absolutely | |
5068 | * be closed on the consumer(s), otherwise it will never be | |
5069 | * cleaned-up, which will result in a leak. | |
5070 | */ | |
d2956687 JG |
5071 | ret = session_set_trace_chunk(session, new_trace_chunk, |
5072 | &chunk_being_archived); | |
5073 | if (ret) { | |
5074 | cmd_ret = LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER; | |
b178f53e JG |
5075 | goto error; |
5076 | } | |
5077 | ||
5c408ad8 | 5078 | if (session->kernel_session) { |
d5a1b7aa JG |
5079 | cmd_ret = kernel_rotate_session(session); |
5080 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5081 | failed_to_rotate = true; |
5082 | rotation_fail_code = cmd_ret; | |
5c408ad8 JD |
5083 | } |
5084 | } | |
5085 | if (session->ust_session) { | |
d5a1b7aa JG |
5086 | cmd_ret = ust_app_rotate_session(session); |
5087 | if (cmd_ret != LTTNG_OK) { | |
3156892b JG |
5088 | failed_to_rotate = true; |
5089 | rotation_fail_code = cmd_ret; | |
5c408ad8 | 5090 | } |
92816cc3 | 5091 | } |
17dd1232 | 5092 | |
3b61d9ee JG |
5093 | if (!session->active) { |
5094 | session->rotated_after_last_stop = true; | |
5095 | } | |
5096 | ||
5097 | if (!chunk_being_archived) { | |
5098 | DBG("Rotating session \"%s\" from a \"NULL\" trace chunk to a new trace chunk, skipping completion check", | |
5099 | session->name); | |
5100 | if (failed_to_rotate) { | |
5101 | cmd_ret = rotation_fail_code; | |
5102 | goto error; | |
5103 | } | |
5104 | cmd_ret = LTTNG_OK; | |
5105 | goto end; | |
5106 | } | |
5107 | ||
5108 | session->rotation_state = LTTNG_ROTATION_STATE_ONGOING; | |
5109 | chunk_status = lttng_trace_chunk_get_id(chunk_being_archived, | |
5110 | &ongoing_rotation_chunk_id); | |
5111 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5112 | ||
bbc4768c | 5113 | ret = session_close_trace_chunk(session, chunk_being_archived, |
343defc2 | 5114 | command, session->last_chunk_path); |
d2956687 JG |
5115 | if (ret) { |
5116 | cmd_ret = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; | |
5117 | goto error; | |
5118 | } | |
5119 | ||
3156892b JG |
5120 | if (failed_to_rotate) { |
5121 | cmd_ret = rotation_fail_code; | |
5122 | goto error; | |
5123 | } | |
5124 | ||
7fdbed1c | 5125 | session->quiet_rotation = quiet_rotation; |
92816cc3 JG |
5126 | ret = timer_session_rotation_pending_check_start(session, |
5127 | DEFAULT_ROTATE_PENDING_TIMER); | |
5128 | if (ret) { | |
d5a1b7aa | 5129 | cmd_ret = LTTNG_ERR_UNK; |
2961f09e | 5130 | goto error; |
5c408ad8 JD |
5131 | } |
5132 | ||
5c408ad8 | 5133 | if (rotate_return) { |
d2956687 | 5134 | rotate_return->rotation_id = ongoing_rotation_chunk_id; |
5c408ad8 JD |
5135 | } |
5136 | ||
d2956687 JG |
5137 | session->chunk_being_archived = chunk_being_archived; |
5138 | chunk_being_archived = NULL; | |
7fdbed1c JG |
5139 | if (!quiet_rotation) { |
5140 | ret = notification_thread_command_session_rotation_ongoing( | |
5141 | notification_thread_handle, | |
5142 | session->name, session->uid, session->gid, | |
5143 | ongoing_rotation_chunk_id); | |
5144 | if (ret != LTTNG_OK) { | |
5145 | ERR("Failed to notify notification thread that a session rotation is ongoing for session %s", | |
5146 | session->name); | |
5147 | cmd_ret = ret; | |
5148 | } | |
2961f09e JG |
5149 | } |
5150 | ||
92816cc3 | 5151 | DBG("Cmd rotate session %s, archive_id %" PRIu64 " sent", |
d2956687 | 5152 | session->name, ongoing_rotation_chunk_id); |
5c408ad8 | 5153 | end: |
d2956687 JG |
5154 | lttng_trace_chunk_put(new_trace_chunk); |
5155 | lttng_trace_chunk_put(chunk_being_archived); | |
d5a1b7aa | 5156 | ret = (cmd_ret == LTTNG_OK) ? cmd_ret : -((int) cmd_ret); |
5c408ad8 | 5157 | return ret; |
2961f09e | 5158 | error: |
2961f09e | 5159 | if (session_reset_rotation_state(session, |
d2956687 | 5160 | LTTNG_ROTATION_STATE_ERROR)) { |
2961f09e JG |
5161 | ERR("Failed to reset rotation state of session \"%s\"", |
5162 | session->name); | |
5163 | } | |
5164 | goto end; | |
5c408ad8 JD |
5165 | } |
5166 | ||
5167 | /* | |
d68c9a04 | 5168 | * Command LTTNG_ROTATION_GET_INFO from the lttng-ctl library. |
5c408ad8 JD |
5169 | * |
5170 | * Check if the session has finished its rotation. | |
5171 | * | |
d2956687 | 5172 | * Return LTTNG_OK on success or else an LTTNG_ERR code. |
5c408ad8 | 5173 | */ |
d68c9a04 JD |
5174 | int cmd_rotate_get_info(struct ltt_session *session, |
5175 | struct lttng_rotation_get_info_return *info_return, | |
5176 | uint64_t rotation_id) | |
5c408ad8 | 5177 | { |
d2956687 JG |
5178 | enum lttng_error_code cmd_ret = LTTNG_OK; |
5179 | enum lttng_rotation_state rotation_state; | |
5c408ad8 | 5180 | |
d68c9a04 | 5181 | DBG("Cmd rotate_get_info session %s, rotation id %" PRIu64, session->name, |
d2956687 | 5182 | session->most_recent_chunk_id.value); |
5c408ad8 | 5183 | |
d2956687 JG |
5184 | if (session->chunk_being_archived) { |
5185 | enum lttng_trace_chunk_status chunk_status; | |
5186 | uint64_t chunk_id; | |
5187 | ||
5188 | chunk_status = lttng_trace_chunk_get_id( | |
5189 | session->chunk_being_archived, | |
5190 | &chunk_id); | |
5191 | assert(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); | |
5192 | ||
5193 | rotation_state = rotation_id == chunk_id ? | |
5194 | LTTNG_ROTATION_STATE_ONGOING : | |
5195 | LTTNG_ROTATION_STATE_EXPIRED; | |
5196 | } else { | |
5197 | if (session->last_archived_chunk_id.is_set && | |
5198 | rotation_id != session->last_archived_chunk_id.value) { | |
5199 | rotation_state = LTTNG_ROTATION_STATE_EXPIRED; | |
5200 | } else { | |
5201 | rotation_state = session->rotation_state; | |
5202 | } | |
5c408ad8 JD |
5203 | } |
5204 | ||
d2956687 JG |
5205 | switch (rotation_state) { |
5206 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
83ed9e90 | 5207 | DBG("Reporting that no rotation has occurred within the lifetime of session \"%s\"", |
d2956687 JG |
5208 | session->name); |
5209 | goto end; | |
5210 | case LTTNG_ROTATION_STATE_EXPIRED: | |
5211 | DBG("Reporting that the rotation state of rotation id %" PRIu64 " of session \"%s\" has expired", | |
5212 | rotation_id, session->name); | |
5213 | break; | |
d68c9a04 | 5214 | case LTTNG_ROTATION_STATE_ONGOING: |
d2956687 | 5215 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is still pending", |
d68c9a04 JD |
5216 | rotation_id, session->name); |
5217 | break; | |
5218 | case LTTNG_ROTATION_STATE_COMPLETED: | |
dd73d57b | 5219 | { |
d2956687 JG |
5220 | int fmt_ret; |
5221 | char *chunk_path; | |
dd73d57b JG |
5222 | char *current_tracing_path_reply; |
5223 | size_t current_tracing_path_reply_len; | |
5224 | ||
d2956687 JG |
5225 | DBG("Reporting that rotation id %" PRIu64 " of session \"%s\" is completed", |
5226 | rotation_id, session->name); | |
5227 | ||
dd73d57b JG |
5228 | switch (session_get_consumer_destination_type(session)) { |
5229 | case CONSUMER_DST_LOCAL: | |
5230 | current_tracing_path_reply = | |
5231 | info_return->location.local.absolute_path; | |
5232 | current_tracing_path_reply_len = | |
5233 | sizeof(info_return->location.local.absolute_path); | |
5234 | info_return->location_type = | |
05f8afa9 | 5235 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL; |
ecd1a12f MD |
5236 | fmt_ret = asprintf(&chunk_path, |
5237 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", | |
5238 | session_get_base_path(session), | |
5239 | session->last_archived_chunk_name); | |
5240 | if (fmt_ret == -1) { | |
5241 | PERROR("Failed to format the path of the last archived trace chunk"); | |
5242 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5243 | cmd_ret = LTTNG_ERR_UNK; | |
5244 | goto end; | |
5245 | } | |
dd73d57b JG |
5246 | break; |
5247 | case CONSUMER_DST_NET: | |
09cfbe47 JG |
5248 | { |
5249 | uint16_t ctrl_port, data_port; | |
5250 | ||
dd73d57b JG |
5251 | current_tracing_path_reply = |
5252 | info_return->location.relay.relative_path; | |
5253 | current_tracing_path_reply_len = | |
5254 | sizeof(info_return->location.relay.relative_path); | |
5255 | /* Currently the only supported relay protocol. */ | |
5256 | info_return->location.relay.protocol = | |
05f8afa9 | 5257 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP; |
dd73d57b | 5258 | |
d2956687 | 5259 | fmt_ret = lttng_strncpy(info_return->location.relay.host, |
dd73d57b JG |
5260 | session_get_net_consumer_hostname(session), |
5261 | sizeof(info_return->location.relay.host)); | |
d2956687 JG |
5262 | if (fmt_ret) { |
5263 | ERR("Failed to copy host name to rotate_get_info reply"); | |
dd73d57b | 5264 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5265 | cmd_ret = LTTNG_ERR_SET_URL; |
dd73d57b JG |
5266 | goto end; |
5267 | } | |
5268 | ||
09cfbe47 JG |
5269 | session_get_net_consumer_ports(session, &ctrl_port, &data_port); |
5270 | info_return->location.relay.ports.control = ctrl_port; | |
5271 | info_return->location.relay.ports.data = data_port; | |
dd73d57b | 5272 | info_return->location_type = |
05f8afa9 | 5273 | (int8_t) LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY; |
ecd1a12f MD |
5274 | chunk_path = strdup(session->last_chunk_path); |
5275 | if (!chunk_path) { | |
5276 | ERR("Failed to allocate the path of the last archived trace chunk"); | |
5277 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; | |
5278 | cmd_ret = LTTNG_ERR_UNK; | |
5279 | goto end; | |
5280 | } | |
dd73d57b | 5281 | break; |
09cfbe47 | 5282 | } |
dd73d57b JG |
5283 | default: |
5284 | abort(); | |
5285 | } | |
d2956687 JG |
5286 | |
5287 | fmt_ret = lttng_strncpy(current_tracing_path_reply, | |
5288 | chunk_path, current_tracing_path_reply_len); | |
5289 | free(chunk_path); | |
5290 | if (fmt_ret) { | |
5291 | ERR("Failed to copy path of the last archived trace chunk to rotate_get_info reply"); | |
d68c9a04 | 5292 | info_return->status = LTTNG_ROTATION_STATUS_ERROR; |
d2956687 | 5293 | cmd_ret = LTTNG_ERR_UNK; |
5c408ad8 JD |
5294 | goto end; |
5295 | } | |
dd73d57b | 5296 | |
d68c9a04 | 5297 | break; |
dd73d57b | 5298 | } |
d68c9a04 | 5299 | case LTTNG_ROTATION_STATE_ERROR: |
d2956687 | 5300 | DBG("Reporting that an error occurred during rotation %" PRIu64 " of session \"%s\"", |
d68c9a04 JD |
5301 | rotation_id, session->name); |
5302 | break; | |
5303 | default: | |
5304 | abort(); | |
5c408ad8 JD |
5305 | } |
5306 | ||
d2956687 | 5307 | cmd_ret = LTTNG_OK; |
5c408ad8 | 5308 | end: |
d2956687 JG |
5309 | info_return->status = (int32_t) rotation_state; |
5310 | return cmd_ret; | |
5c408ad8 JD |
5311 | } |
5312 | ||
259c2674 JD |
5313 | /* |
5314 | * Command LTTNG_ROTATION_SET_SCHEDULE from the lttng-ctl library. | |
5315 | * | |
5316 | * Configure the automatic rotation parameters. | |
66ea93b1 JG |
5317 | * 'activate' to true means activate the rotation schedule type with 'new_value'. |
5318 | * 'activate' to false means deactivate the rotation schedule and validate that | |
5319 | * 'new_value' has the same value as the currently active value. | |
259c2674 | 5320 | * |
66ea93b1 | 5321 | * Return 0 on success or else a positive LTTNG_ERR code. |
259c2674 JD |
5322 | */ |
5323 | int cmd_rotation_set_schedule(struct ltt_session *session, | |
66ea93b1 JG |
5324 | bool activate, enum lttng_rotation_schedule_type schedule_type, |
5325 | uint64_t new_value, | |
90936dcf | 5326 | struct notification_thread_handle *notification_thread_handle) |
259c2674 JD |
5327 | { |
5328 | int ret; | |
66ea93b1 | 5329 | uint64_t *parameter_value; |
259c2674 JD |
5330 | |
5331 | assert(session); | |
5332 | ||
5333 | DBG("Cmd rotate set schedule session %s", session->name); | |
5334 | ||
92fe5ca1 | 5335 | if (session->live_timer || !session->output_traces) { |
66ea93b1 | 5336 | DBG("Failing ROTATION_SET_SCHEDULE command as the rotation feature is not available for this session"); |
259c2674 JD |
5337 | ret = LTTNG_ERR_ROTATION_NOT_AVAILABLE; |
5338 | goto end; | |
5339 | } | |
5340 | ||
66ea93b1 JG |
5341 | switch (schedule_type) { |
5342 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5343 | parameter_value = &session->rotate_size; | |
5344 | break; | |
5345 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5346 | parameter_value = &session->rotate_timer_period; | |
5347 | if (new_value >= UINT_MAX) { | |
5348 | DBG("Failing ROTATION_SET_SCHEDULE command as the value requested for a periodic rotation schedule is invalid: %" PRIu64 " > %u (UINT_MAX)", | |
5349 | new_value, UINT_MAX); | |
5350 | ret = LTTNG_ERR_INVALID; | |
5351 | goto end; | |
5352 | } | |
5353 | break; | |
5354 | default: | |
5355 | WARN("Failing ROTATION_SET_SCHEDULE command on unknown schedule type"); | |
5356 | ret = LTTNG_ERR_INVALID; | |
259c2674 | 5357 | goto end; |
66ea93b1 JG |
5358 | } |
5359 | ||
5360 | /* Improper use of the API. */ | |
5361 | if (new_value == -1ULL) { | |
5362 | WARN("Failing ROTATION_SET_SCHEDULE command as the value requested is -1"); | |
5363 | ret = LTTNG_ERR_INVALID; | |
259c2674 JD |
5364 | goto end; |
5365 | } | |
5366 | ||
66ea93b1 JG |
5367 | /* |
5368 | * As indicated in struct ltt_session's comments, a value of == 0 means | |
5369 | * this schedule rotation type is not in use. | |
5370 | * | |
5371 | * Reject the command if we were asked to activate a schedule that was | |
5372 | * already active. | |
5373 | */ | |
5374 | if (activate && *parameter_value != 0) { | |
5375 | DBG("Failing ROTATION_SET_SCHEDULE (activate) command as the schedule is already active"); | |
5376 | ret = LTTNG_ERR_ROTATION_SCHEDULE_SET; | |
90936dcf | 5377 | goto end; |
66ea93b1 JG |
5378 | } |
5379 | ||
5380 | /* | |
5381 | * Reject the command if we were asked to deactivate a schedule that was | |
5382 | * not active. | |
5383 | */ | |
5384 | if (!activate && *parameter_value == 0) { | |
5385 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as the schedule is already inactive"); | |
5386 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
90936dcf JD |
5387 | goto end; |
5388 | } | |
5389 | ||
66ea93b1 JG |
5390 | /* |
5391 | * Reject the command if we were asked to deactivate a schedule that | |
5392 | * doesn't exist. | |
5393 | */ | |
5394 | if (!activate && *parameter_value != new_value) { | |
5395 | DBG("Failing ROTATION_SET_SCHEDULE (deactivate) command as an inexistant schedule was provided"); | |
5396 | ret = LTTNG_ERR_ROTATION_SCHEDULE_NOT_SET; | |
5397 | goto end; | |
5398 | } | |
259c2674 | 5399 | |
66ea93b1 JG |
5400 | *parameter_value = activate ? new_value : 0; |
5401 | ||
5402 | switch (schedule_type) { | |
5403 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
5404 | if (activate && session->active) { | |
5405 | /* | |
5406 | * Only start the timer if the session is active, | |
5407 | * otherwise it will be started when the session starts. | |
5408 | */ | |
92816cc3 JG |
5409 | ret = timer_session_rotation_schedule_timer_start( |
5410 | session, new_value); | |
259c2674 | 5411 | if (ret) { |
66ea93b1 | 5412 | ERR("Failed to enable session rotation timer in ROTATION_SET_SCHEDULE command"); |
259c2674 JD |
5413 | ret = LTTNG_ERR_UNK; |
5414 | goto end; | |
5415 | } | |
66ea93b1 | 5416 | } else { |
92816cc3 JG |
5417 | ret = timer_session_rotation_schedule_timer_stop( |
5418 | session); | |
66ea93b1 JG |
5419 | if (ret) { |
5420 | ERR("Failed to disable session rotation timer in ROTATION_SET_SCHEDULE command"); | |
5421 | ret = LTTNG_ERR_UNK; | |
f3ce6946 | 5422 | goto end; |
66ea93b1 | 5423 | } |
259c2674 | 5424 | } |
66ea93b1 JG |
5425 | break; |
5426 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
5427 | if (activate) { | |
5428 | ret = subscribe_session_consumed_size_rotation(session, | |
5429 | new_value, notification_thread_handle); | |
90936dcf | 5430 | if (ret) { |
66ea93b1 | 5431 | ERR("Failed to enable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5432 | ret = LTTNG_ERR_UNK; |
5433 | goto end; | |
5434 | } | |
90936dcf | 5435 | } else { |
66ea93b1 JG |
5436 | ret = unsubscribe_session_consumed_size_rotation(session, |
5437 | notification_thread_handle); | |
90936dcf | 5438 | if (ret) { |
66ea93b1 | 5439 | ERR("Failed to disable consumed-size notification in ROTATION_SET_SCHEDULE command"); |
90936dcf JD |
5440 | ret = LTTNG_ERR_UNK; |
5441 | goto end; | |
5442 | } | |
66ea93b1 | 5443 | |
90936dcf | 5444 | } |
66ea93b1 JG |
5445 | break; |
5446 | default: | |
5447 | /* Would have been caught before. */ | |
5448 | abort(); | |
90936dcf JD |
5449 | } |
5450 | ||
259c2674 JD |
5451 | ret = LTTNG_OK; |
5452 | ||
5453 | goto end; | |
5454 | ||
5455 | end: | |
5456 | return ret; | |
5457 | } | |
5458 | ||
a503e1ef JG |
5459 | /* Wait for a given path to be removed before continuing. */ |
5460 | static enum lttng_error_code wait_on_path(void *path_data) | |
5461 | { | |
5462 | const char *shm_path = path_data; | |
5463 | ||
5464 | DBG("Waiting for the shm path at %s to be removed before completing session destruction", | |
5465 | shm_path); | |
5466 | while (true) { | |
5467 | int ret; | |
5468 | struct stat st; | |
5469 | ||
5470 | ret = stat(shm_path, &st); | |
5471 | if (ret) { | |
5472 | if (errno != ENOENT) { | |
5473 | PERROR("stat() returned an error while checking for the existence of the shm path"); | |
5474 | } else { | |
5475 | DBG("shm path no longer exists, completing the destruction of session"); | |
5476 | } | |
5477 | break; | |
5478 | } else { | |
5479 | if (!S_ISDIR(st.st_mode)) { | |
5480 | ERR("The type of shm path %s returned by stat() is not a directory; aborting the wait for shm path removal", | |
5481 | shm_path); | |
5482 | break; | |
5483 | } | |
5484 | } | |
5485 | usleep(SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US); | |
5486 | } | |
5487 | return LTTNG_OK; | |
5488 | } | |
5489 | ||
5490 | /* | |
5491 | * Returns a pointer to a handler to run on completion of a command. | |
5492 | * Returns NULL if no handler has to be run for the last command executed. | |
5493 | */ | |
5494 | const struct cmd_completion_handler *cmd_pop_completion_handler(void) | |
5495 | { | |
5496 | struct cmd_completion_handler *handler = current_completion_handler; | |
5497 | ||
5498 | current_completion_handler = NULL; | |
5499 | return handler; | |
5500 | } | |
5501 | ||
2f77fc4b DG |
5502 | /* |
5503 | * Init command subsystem. | |
5504 | */ | |
5505 | void cmd_init(void) | |
5506 | { | |
5507 | /* | |
d88aee68 DG |
5508 | * Set network sequence index to 1 for streams to match a relayd |
5509 | * socket on the consumer side. | |
2f77fc4b | 5510 | */ |
d88aee68 DG |
5511 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
5512 | relayd_net_seq_idx = 1; | |
5513 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
5514 | |
5515 | DBG("Command subsystem initialized"); | |
5516 | } |