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