Commit | Line | Data |
---|---|---|
2f77fc4b DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
6dc3064a | 20 | #include <inttypes.h> |
2f77fc4b DG |
21 | #include <urcu/list.h> |
22 | #include <urcu/uatomic.h> | |
23 | ||
24 | #include <common/defaults.h> | |
25 | #include <common/common.h> | |
26 | #include <common/sessiond-comm/sessiond-comm.h> | |
27 | #include <common/relayd/relayd.h> | |
10a50311 | 28 | #include <common/utils.h> |
2f77fc4b DG |
29 | |
30 | #include "channel.h" | |
31 | #include "consumer.h" | |
32 | #include "event.h" | |
8782cc74 | 33 | #include "health-sessiond.h" |
2f77fc4b DG |
34 | #include "kernel.h" |
35 | #include "kernel-consumer.h" | |
36 | #include "lttng-sessiond.h" | |
37 | #include "utils.h" | |
834978fd | 38 | #include "syscall.h" |
2f77fc4b DG |
39 | |
40 | #include "cmd.h" | |
41 | ||
42 | /* | |
43 | * Used to keep a unique index for each relayd socket created where this value | |
44 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
45 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
46 | * held. | |
2f77fc4b | 47 | */ |
d88aee68 DG |
48 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
49 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b | 50 | |
18a720cd MD |
51 | /* |
52 | * Both functions below are special case for the Kernel domain when | |
53 | * enabling/disabling all events. | |
54 | */ | |
55 | static | |
56 | int enable_kevent_all(struct ltt_session *session, | |
57 | struct lttng_domain *domain, char *channel_name, | |
58 | struct lttng_event *event, | |
59 | char *filter_expression, | |
60 | struct lttng_filter_bytecode *filter, int wpipe); | |
61 | static | |
62 | int disable_kevent_all(struct ltt_session *session, int domain, | |
63 | char *channel_name, | |
64 | struct lttng_event *event); | |
65 | ||
2f77fc4b DG |
66 | /* |
67 | * Create a session path used by list_lttng_sessions for the case that the | |
68 | * session consumer is on the network. | |
69 | */ | |
70 | static int build_network_session_path(char *dst, size_t size, | |
71 | struct ltt_session *session) | |
72 | { | |
73 | int ret, kdata_port, udata_port; | |
74 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
75 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
76 | ||
77 | assert(session); | |
78 | assert(dst); | |
79 | ||
80 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
81 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
82 | ||
83 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
84 | ||
85 | if (session->kernel_session && session->kernel_session->consumer) { | |
86 | kuri = &session->kernel_session->consumer->dst.net.control; | |
87 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
88 | } | |
89 | ||
90 | if (session->ust_session && session->ust_session->consumer) { | |
91 | uuri = &session->ust_session->consumer->dst.net.control; | |
92 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
93 | } | |
94 | ||
95 | if (uuri == NULL && kuri == NULL) { | |
96 | uri = &session->consumer->dst.net.control; | |
97 | kdata_port = session->consumer->dst.net.data.port; | |
98 | } else if (kuri && uuri) { | |
99 | ret = uri_compare(kuri, uuri); | |
100 | if (ret) { | |
101 | /* Not Equal */ | |
102 | uri = kuri; | |
103 | /* Build uuri URL string */ | |
104 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
105 | if (ret < 0) { | |
106 | goto error; | |
107 | } | |
108 | } else { | |
109 | uri = kuri; | |
110 | } | |
111 | } else if (kuri && uuri == NULL) { | |
112 | uri = kuri; | |
113 | } else if (uuri && kuri == NULL) { | |
114 | uri = uuri; | |
115 | } | |
116 | ||
117 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
118 | if (ret < 0) { | |
119 | goto error; | |
120 | } | |
121 | ||
9aa9f900 DG |
122 | /* |
123 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
124 | * to print. | |
125 | */ | |
9d035200 | 126 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
127 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
128 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
129 | } else { | |
9aa9f900 | 130 | int dport; |
bef08707 | 131 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
132 | dport = kdata_port; |
133 | } else { | |
134 | /* No kernel URI, use the UST port. */ | |
135 | dport = udata_port; | |
136 | } | |
137 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
138 | } |
139 | ||
140 | error: | |
141 | return ret; | |
142 | } | |
143 | ||
144 | /* | |
145 | * Fill lttng_channel array of all channels. | |
146 | */ | |
147 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
148 | struct lttng_channel *channels) | |
149 | { | |
150 | int i = 0; | |
151 | struct ltt_kernel_channel *kchan; | |
152 | ||
153 | DBG("Listing channels for session %s", session->name); | |
154 | ||
155 | switch (domain) { | |
156 | case LTTNG_DOMAIN_KERNEL: | |
157 | /* Kernel channels */ | |
158 | if (session->kernel_session != NULL) { | |
159 | cds_list_for_each_entry(kchan, | |
160 | &session->kernel_session->channel_list.head, list) { | |
161 | /* Copy lttng_channel struct to array */ | |
162 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
163 | channels[i].enabled = kchan->enabled; | |
164 | i++; | |
165 | } | |
166 | } | |
167 | break; | |
168 | case LTTNG_DOMAIN_UST: | |
169 | { | |
170 | struct lttng_ht_iter iter; | |
171 | struct ltt_ust_channel *uchan; | |
172 | ||
e7fe706f | 173 | rcu_read_lock(); |
2f77fc4b DG |
174 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
175 | &iter.iter, uchan, node.node) { | |
176 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
177 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
178 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
179 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
180 | channels[i].attr.switch_timer_interval = | |
181 | uchan->attr.switch_timer_interval; | |
182 | channels[i].attr.read_timer_interval = | |
183 | uchan->attr.read_timer_interval; | |
184 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
185 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
186 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
2f77fc4b DG |
187 | switch (uchan->attr.output) { |
188 | case LTTNG_UST_MMAP: | |
189 | default: | |
190 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
191 | break; | |
192 | } | |
193 | i++; | |
194 | } | |
e7fe706f | 195 | rcu_read_unlock(); |
2f77fc4b DG |
196 | break; |
197 | } | |
198 | default: | |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
3c6a091f | 203 | /* |
022d91ba | 204 | * Create a list of agent domain events. |
3c6a091f DG |
205 | * |
206 | * Return number of events in list on success or else a negative value. | |
207 | */ | |
022d91ba | 208 | static int list_lttng_agent_events(struct agent *agt, |
3c6a091f DG |
209 | struct lttng_event **events) |
210 | { | |
211 | int i = 0, ret = 0; | |
212 | unsigned int nb_event = 0; | |
022d91ba | 213 | struct agent_event *event; |
3c6a091f DG |
214 | struct lttng_event *tmp_events; |
215 | struct lttng_ht_iter iter; | |
216 | ||
022d91ba | 217 | assert(agt); |
3c6a091f DG |
218 | assert(events); |
219 | ||
022d91ba | 220 | DBG3("Listing agent events"); |
3c6a091f | 221 | |
022d91ba | 222 | nb_event = lttng_ht_get_count(agt->events); |
3c6a091f DG |
223 | if (nb_event == 0) { |
224 | ret = nb_event; | |
225 | goto error; | |
226 | } | |
227 | ||
228 | tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); | |
229 | if (!tmp_events) { | |
022d91ba | 230 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
231 | ret = -LTTNG_ERR_FATAL; |
232 | goto error; | |
233 | } | |
234 | ||
235 | rcu_read_lock(); | |
022d91ba | 236 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
237 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
238 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
239 | tmp_events[i].enabled = event->enabled; | |
ff94328f DG |
240 | tmp_events[i].loglevel = event->loglevel; |
241 | tmp_events[i].loglevel_type = event->loglevel_type; | |
3c6a091f DG |
242 | i++; |
243 | } | |
244 | rcu_read_unlock(); | |
245 | ||
246 | *events = tmp_events; | |
247 | ret = nb_event; | |
248 | ||
249 | error: | |
250 | assert(nb_event == i); | |
251 | return ret; | |
252 | } | |
253 | ||
2f77fc4b DG |
254 | /* |
255 | * Create a list of ust global domain events. | |
256 | */ | |
257 | static int list_lttng_ust_global_events(char *channel_name, | |
258 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
259 | { | |
260 | int i = 0, ret = 0; | |
261 | unsigned int nb_event = 0; | |
262 | struct lttng_ht_iter iter; | |
263 | struct lttng_ht_node_str *node; | |
264 | struct ltt_ust_channel *uchan; | |
265 | struct ltt_ust_event *uevent; | |
266 | struct lttng_event *tmp; | |
267 | ||
268 | DBG("Listing UST global events for channel %s", channel_name); | |
269 | ||
270 | rcu_read_lock(); | |
271 | ||
272 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
273 | node = lttng_ht_iter_get_node_str(&iter); | |
274 | if (node == NULL) { | |
f73fabfd | 275 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
276 | goto error; |
277 | } | |
278 | ||
279 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
280 | ||
281 | nb_event += lttng_ht_get_count(uchan->events); | |
282 | ||
283 | if (nb_event == 0) { | |
284 | ret = nb_event; | |
285 | goto error; | |
286 | } | |
287 | ||
288 | DBG3("Listing UST global %d events", nb_event); | |
289 | ||
290 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
291 | if (tmp == NULL) { | |
f73fabfd | 292 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
293 | goto error; |
294 | } | |
295 | ||
296 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
297 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
298 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
299 | tmp[i].enabled = uevent->enabled; | |
300 | ||
301 | switch (uevent->attr.instrumentation) { | |
302 | case LTTNG_UST_TRACEPOINT: | |
303 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
304 | break; | |
305 | case LTTNG_UST_PROBE: | |
306 | tmp[i].type = LTTNG_EVENT_PROBE; | |
307 | break; | |
308 | case LTTNG_UST_FUNCTION: | |
309 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
310 | break; | |
311 | } | |
312 | ||
313 | tmp[i].loglevel = uevent->attr.loglevel; | |
314 | switch (uevent->attr.loglevel_type) { | |
315 | case LTTNG_UST_LOGLEVEL_ALL: | |
316 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
317 | break; | |
318 | case LTTNG_UST_LOGLEVEL_RANGE: | |
319 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
320 | break; | |
321 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
322 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
323 | break; | |
324 | } | |
325 | if (uevent->filter) { | |
326 | tmp[i].filter = 1; | |
327 | } | |
4634f12e JI |
328 | if (uevent->exclusion) { |
329 | tmp[i].exclusion = 1; | |
330 | } | |
2f77fc4b DG |
331 | i++; |
332 | } | |
333 | ||
334 | ret = nb_event; | |
335 | *events = tmp; | |
336 | ||
337 | error: | |
338 | rcu_read_unlock(); | |
339 | return ret; | |
340 | } | |
341 | ||
342 | /* | |
343 | * Fill lttng_event array of all kernel events in the channel. | |
344 | */ | |
345 | static int list_lttng_kernel_events(char *channel_name, | |
346 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
347 | { | |
348 | int i = 0, ret; | |
349 | unsigned int nb_event; | |
350 | struct ltt_kernel_event *event; | |
351 | struct ltt_kernel_channel *kchan; | |
352 | ||
353 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
354 | if (kchan == NULL) { | |
f73fabfd | 355 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
356 | goto error; |
357 | } | |
358 | ||
359 | nb_event = kchan->event_count; | |
360 | ||
361 | DBG("Listing events for channel %s", kchan->channel->name); | |
362 | ||
363 | if (nb_event == 0) { | |
834978fd DG |
364 | *events = NULL; |
365 | goto syscall; | |
2f77fc4b DG |
366 | } |
367 | ||
368 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
369 | if (*events == NULL) { | |
f73fabfd | 370 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
371 | goto error; |
372 | } | |
373 | ||
374 | /* Kernel channels */ | |
375 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
376 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
377 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
378 | (*events)[i].enabled = event->enabled; | |
379 | ||
380 | switch (event->event->instrumentation) { | |
381 | case LTTNG_KERNEL_TRACEPOINT: | |
382 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
383 | break; | |
2f77fc4b | 384 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
385 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
386 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
387 | sizeof(struct lttng_kernel_kprobe)); | |
388 | break; | |
389 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
390 | (*events)[i].type = LTTNG_EVENT_PROBE; |
391 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
392 | sizeof(struct lttng_kernel_kprobe)); | |
393 | break; | |
394 | case LTTNG_KERNEL_FUNCTION: | |
395 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
396 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
397 | sizeof(struct lttng_kernel_function)); | |
398 | break; | |
399 | case LTTNG_KERNEL_NOOP: | |
400 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
401 | break; | |
402 | case LTTNG_KERNEL_SYSCALL: | |
403 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
404 | break; | |
405 | case LTTNG_KERNEL_ALL: | |
406 | assert(0); | |
407 | break; | |
408 | } | |
409 | i++; | |
410 | } | |
411 | ||
834978fd DG |
412 | syscall: |
413 | if (syscall_table) { | |
414 | ssize_t new_size; | |
415 | ||
416 | new_size = syscall_list_channel(kchan, events, nb_event); | |
417 | if (new_size < 0) { | |
418 | free(events); | |
419 | ret = -new_size; | |
420 | goto error; | |
421 | } | |
422 | nb_event = new_size; | |
423 | } | |
424 | ||
2f77fc4b DG |
425 | return nb_event; |
426 | ||
427 | error: | |
f73fabfd DG |
428 | /* Negate the error code to differentiate the size from an error */ |
429 | return -ret; | |
2f77fc4b DG |
430 | } |
431 | ||
432 | /* | |
433 | * Add URI so the consumer output object. Set the correct path depending on the | |
434 | * domain adding the default trace directory. | |
435 | */ | |
436 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
437 | struct lttng_uri *uri, int domain, const char *session_name) | |
438 | { | |
f73fabfd | 439 | int ret = LTTNG_OK; |
2f77fc4b DG |
440 | const char *default_trace_dir; |
441 | ||
442 | assert(uri); | |
443 | ||
444 | if (consumer == NULL) { | |
445 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 446 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
447 | goto error; |
448 | } | |
449 | ||
450 | switch (domain) { | |
451 | case LTTNG_DOMAIN_KERNEL: | |
452 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
453 | break; | |
454 | case LTTNG_DOMAIN_UST: | |
455 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
456 | break; | |
457 | default: | |
458 | /* | |
459 | * This case is possible is we try to add the URI to the global tracing | |
460 | * session consumer object which in this case there is no subdir. | |
461 | */ | |
462 | default_trace_dir = ""; | |
463 | } | |
464 | ||
465 | switch (uri->dtype) { | |
466 | case LTTNG_DST_IPV4: | |
467 | case LTTNG_DST_IPV6: | |
468 | DBG2("Setting network URI to consumer"); | |
469 | ||
df75acac DG |
470 | if (consumer->type == CONSUMER_DST_NET) { |
471 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
472 | consumer->dst.net.control_isset) || |
473 | (uri->stype == LTTNG_STREAM_DATA && | |
474 | consumer->dst.net.data_isset)) { | |
df75acac DG |
475 | ret = LTTNG_ERR_URL_EXIST; |
476 | goto error; | |
477 | } | |
478 | } else { | |
479 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
480 | } |
481 | ||
df75acac DG |
482 | consumer->type = CONSUMER_DST_NET; |
483 | ||
2f77fc4b DG |
484 | /* Set URI into consumer output object */ |
485 | ret = consumer_set_network_uri(consumer, uri); | |
486 | if (ret < 0) { | |
a74934ba | 487 | ret = -ret; |
2f77fc4b DG |
488 | goto error; |
489 | } else if (ret == 1) { | |
490 | /* | |
491 | * URI was the same in the consumer so we do not append the subdir | |
492 | * again so to not duplicate output dir. | |
493 | */ | |
f86c9f4e | 494 | ret = LTTNG_OK; |
2f77fc4b DG |
495 | goto error; |
496 | } | |
497 | ||
498 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
499 | ret = consumer_set_subdir(consumer, session_name); | |
500 | if (ret < 0) { | |
f73fabfd | 501 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
502 | goto error; |
503 | } | |
504 | } | |
505 | ||
506 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
507 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
508 | strncat(consumer->subdir, default_trace_dir, |
509 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
510 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
511 | } | |
512 | ||
513 | break; | |
514 | case LTTNG_DST_PATH: | |
515 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
516 | memset(consumer->dst.trace_path, 0, | |
517 | sizeof(consumer->dst.trace_path)); | |
518 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
519 | sizeof(consumer->dst.trace_path)); | |
520 | /* Append default trace dir */ | |
521 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
522 | sizeof(consumer->dst.trace_path) - |
523 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
524 | /* Flag consumer as local. */ |
525 | consumer->type = CONSUMER_DST_LOCAL; | |
526 | break; | |
527 | } | |
528 | ||
a74934ba DG |
529 | ret = LTTNG_OK; |
530 | ||
2f77fc4b DG |
531 | error: |
532 | return ret; | |
533 | } | |
534 | ||
535 | /* | |
536 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
537 | */ | |
538 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
539 | { | |
540 | int ret = 0; | |
541 | struct lttng_ht_iter iter; | |
542 | struct consumer_socket *socket; | |
543 | ||
544 | assert(session); | |
545 | ||
e7fe706f DG |
546 | rcu_read_lock(); |
547 | ||
2f77fc4b DG |
548 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
549 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
550 | socket, node.node) { | |
2f77fc4b | 551 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 552 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
553 | pthread_mutex_unlock(socket->lock); |
554 | if (ret < 0) { | |
f73fabfd | 555 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
556 | goto error; |
557 | } | |
558 | } | |
559 | } | |
560 | ||
561 | error: | |
e7fe706f | 562 | rcu_read_unlock(); |
2f77fc4b DG |
563 | return ret; |
564 | } | |
565 | ||
566 | /* | |
567 | * Create a socket to the relayd using the URI. | |
568 | * | |
569 | * On success, the relayd_sock pointer is set to the created socket. | |
570 | * Else, it's stays untouched and a lttcomm error code is returned. | |
571 | */ | |
6151a90f JD |
572 | static int create_connect_relayd(struct lttng_uri *uri, |
573 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
574 | { |
575 | int ret; | |
6151a90f | 576 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 577 | |
6151a90f JD |
578 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
579 | RELAYD_VERSION_COMM_MINOR); | |
580 | if (!rsock) { | |
f73fabfd | 581 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
582 | goto error; |
583 | } | |
584 | ||
ffe60014 DG |
585 | /* |
586 | * Connect to relayd so we can proceed with a session creation. This call | |
587 | * can possibly block for an arbitrary amount of time to set the health | |
588 | * state to be in poll execution. | |
589 | */ | |
590 | health_poll_entry(); | |
6151a90f | 591 | ret = relayd_connect(rsock); |
ffe60014 | 592 | health_poll_exit(); |
2f77fc4b DG |
593 | if (ret < 0) { |
594 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 595 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
596 | goto free_sock; |
597 | } | |
598 | ||
599 | /* Create socket for control stream. */ | |
600 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
601 | DBG3("Creating relayd stream socket from URI"); | |
602 | ||
603 | /* Check relayd version */ | |
6151a90f | 604 | ret = relayd_version_check(rsock); |
2f77fc4b | 605 | if (ret < 0) { |
f73fabfd | 606 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
607 | goto close_sock; |
608 | } | |
609 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
610 | DBG3("Creating relayd data socket from URI"); | |
611 | } else { | |
612 | /* Command is not valid */ | |
613 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 614 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
615 | goto close_sock; |
616 | } | |
617 | ||
6151a90f | 618 | *relayd_sock = rsock; |
2f77fc4b | 619 | |
f73fabfd | 620 | return LTTNG_OK; |
2f77fc4b DG |
621 | |
622 | close_sock: | |
6151a90f JD |
623 | /* The returned value is not useful since we are on an error path. */ |
624 | (void) relayd_close(rsock); | |
2f77fc4b | 625 | free_sock: |
6151a90f | 626 | free(rsock); |
2f77fc4b DG |
627 | error: |
628 | return ret; | |
629 | } | |
630 | ||
631 | /* | |
632 | * Connect to the relayd using URI and send the socket to the right consumer. | |
633 | */ | |
6dc3064a | 634 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 635 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
636 | struct consumer_socket *consumer_sock, |
637 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
638 | { |
639 | int ret; | |
6151a90f | 640 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 641 | |
ffe60014 | 642 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 643 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 644 | if (ret != LTTNG_OK) { |
6151a90f | 645 | goto error; |
ffe60014 | 646 | } |
6151a90f | 647 | assert(rsock); |
ffe60014 | 648 | |
2f77fc4b | 649 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
650 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
651 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
652 | /* |
653 | * Increment net_seq_idx because we are about to transfer the | |
654 | * new relayd socket to the consumer. | |
d88aee68 | 655 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 656 | */ |
d88aee68 DG |
657 | consumer->net_seq_index = ++relayd_net_seq_idx; |
658 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
659 | } |
660 | ||
2f77fc4b | 661 | /* Send relayd socket to consumer. */ |
6151a90f | 662 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
663 | relayd_uri->stype, session_id, |
664 | session_name, hostname, session_live_timer); | |
2f77fc4b | 665 | if (ret < 0) { |
f73fabfd | 666 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
667 | goto close_sock; |
668 | } | |
669 | ||
c890b720 DG |
670 | /* Flag that the corresponding socket was sent. */ |
671 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 672 | consumer_sock->control_sock_sent = 1; |
c890b720 | 673 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 674 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
675 | } |
676 | ||
f73fabfd | 677 | ret = LTTNG_OK; |
2f77fc4b DG |
678 | |
679 | /* | |
680 | * Close socket which was dup on the consumer side. The session daemon does | |
681 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
682 | */ | |
683 | ||
684 | close_sock: | |
6151a90f JD |
685 | (void) relayd_close(rsock); |
686 | free(rsock); | |
2f77fc4b | 687 | |
6151a90f | 688 | error: |
ffe60014 DG |
689 | if (ret != LTTNG_OK) { |
690 | /* | |
d9078d0c DG |
691 | * The consumer output for this session should not be used anymore |
692 | * since the relayd connection failed thus making any tracing or/and | |
693 | * streaming not usable. | |
ffe60014 | 694 | */ |
d9078d0c | 695 | consumer->enabled = 0; |
ffe60014 | 696 | } |
2f77fc4b DG |
697 | return ret; |
698 | } | |
699 | ||
700 | /* | |
701 | * Send both relayd sockets to a specific consumer and domain. This is a | |
702 | * helper function to facilitate sending the information to the consumer for a | |
703 | * session. | |
704 | */ | |
6dc3064a | 705 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
706 | struct consumer_output *consumer, struct consumer_socket *sock, |
707 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 708 | { |
dda67f6c | 709 | int ret = LTTNG_OK; |
2f77fc4b | 710 | |
2f77fc4b | 711 | assert(consumer); |
6dc3064a | 712 | assert(sock); |
2f77fc4b | 713 | |
2f77fc4b | 714 | /* Sending control relayd socket. */ |
ffe60014 | 715 | if (!sock->control_sock_sent) { |
6dc3064a | 716 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
717 | &consumer->dst.net.control, consumer, sock, |
718 | session_name, hostname, session_live_timer); | |
c890b720 DG |
719 | if (ret != LTTNG_OK) { |
720 | goto error; | |
721 | } | |
2f77fc4b DG |
722 | } |
723 | ||
724 | /* Sending data relayd socket. */ | |
ffe60014 | 725 | if (!sock->data_sock_sent) { |
6dc3064a | 726 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
727 | &consumer->dst.net.data, consumer, sock, |
728 | session_name, hostname, session_live_timer); | |
c890b720 DG |
729 | if (ret != LTTNG_OK) { |
730 | goto error; | |
731 | } | |
2f77fc4b DG |
732 | } |
733 | ||
2f77fc4b DG |
734 | error: |
735 | return ret; | |
736 | } | |
737 | ||
738 | /* | |
739 | * Setup relayd connections for a tracing session. First creates the socket to | |
740 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
741 | * network. | |
742 | */ | |
ffe60014 | 743 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 744 | { |
f73fabfd | 745 | int ret = LTTNG_OK; |
2f77fc4b DG |
746 | struct ltt_ust_session *usess; |
747 | struct ltt_kernel_session *ksess; | |
748 | struct consumer_socket *socket; | |
749 | struct lttng_ht_iter iter; | |
750 | ||
751 | assert(session); | |
752 | ||
753 | usess = session->ust_session; | |
754 | ksess = session->kernel_session; | |
755 | ||
785d2d0d | 756 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 757 | |
e7fe706f DG |
758 | rcu_read_lock(); |
759 | ||
2f77fc4b DG |
760 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
761 | && usess->consumer->enabled) { | |
762 | /* For each consumer socket, send relayd sockets */ | |
763 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
764 | socket, node.node) { | |
2f77fc4b | 765 | pthread_mutex_lock(socket->lock); |
6dc3064a | 766 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
767 | usess->consumer, socket, |
768 | session->name, session->hostname, | |
769 | session->live_timer); | |
2f77fc4b | 770 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 771 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
772 | goto error; |
773 | } | |
6dc3064a DG |
774 | /* Session is now ready for network streaming. */ |
775 | session->net_handle = 1; | |
2f77fc4b DG |
776 | } |
777 | } | |
778 | ||
779 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
780 | && ksess->consumer->enabled) { | |
781 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
782 | socket, node.node) { | |
2f77fc4b | 783 | pthread_mutex_lock(socket->lock); |
6dc3064a | 784 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
785 | ksess->consumer, socket, |
786 | session->name, session->hostname, | |
787 | session->live_timer); | |
2f77fc4b | 788 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 789 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
790 | goto error; |
791 | } | |
6dc3064a DG |
792 | /* Session is now ready for network streaming. */ |
793 | session->net_handle = 1; | |
2f77fc4b DG |
794 | } |
795 | } | |
796 | ||
797 | error: | |
e7fe706f | 798 | rcu_read_unlock(); |
2f77fc4b DG |
799 | return ret; |
800 | } | |
801 | ||
9b6c7ec5 DG |
802 | /* |
803 | * Start a kernel session by opening all necessary streams. | |
804 | */ | |
805 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
806 | { | |
807 | int ret; | |
808 | struct ltt_kernel_channel *kchan; | |
809 | ||
810 | /* Open kernel metadata */ | |
07b86b52 | 811 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
812 | ret = kernel_open_metadata(ksess); |
813 | if (ret < 0) { | |
814 | ret = LTTNG_ERR_KERN_META_FAIL; | |
815 | goto error; | |
816 | } | |
817 | } | |
818 | ||
819 | /* Open kernel metadata stream */ | |
07b86b52 | 820 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
821 | ret = kernel_open_metadata_stream(ksess); |
822 | if (ret < 0) { | |
823 | ERR("Kernel create metadata stream failed"); | |
824 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
825 | goto error; | |
826 | } | |
827 | } | |
828 | ||
829 | /* For each channel */ | |
830 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
831 | if (kchan->stream_count == 0) { | |
832 | ret = kernel_open_channel_stream(kchan); | |
833 | if (ret < 0) { | |
834 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
835 | goto error; | |
836 | } | |
837 | /* Update the stream global counter */ | |
838 | ksess->stream_count_global += ret; | |
839 | } | |
840 | } | |
841 | ||
842 | /* Setup kernel consumer socket and send fds to it */ | |
843 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 844 | if (ret != 0) { |
9b6c7ec5 DG |
845 | ret = LTTNG_ERR_KERN_START_FAIL; |
846 | goto error; | |
847 | } | |
848 | ||
849 | /* This start the kernel tracing */ | |
850 | ret = kernel_start_session(ksess); | |
851 | if (ret < 0) { | |
852 | ret = LTTNG_ERR_KERN_START_FAIL; | |
853 | goto error; | |
854 | } | |
855 | ||
856 | /* Quiescent wait after starting trace */ | |
784303b0 | 857 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 858 | |
14fb1ebe | 859 | ksess->active = 1; |
9b6c7ec5 DG |
860 | |
861 | ret = LTTNG_OK; | |
862 | ||
863 | error: | |
864 | return ret; | |
865 | } | |
866 | ||
2f77fc4b DG |
867 | /* |
868 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
869 | */ | |
870 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
871 | char *channel_name) | |
872 | { | |
873 | int ret; | |
874 | struct ltt_ust_session *usess; | |
875 | ||
876 | usess = session->ust_session; | |
877 | ||
2223c96f DG |
878 | rcu_read_lock(); |
879 | ||
2f77fc4b DG |
880 | switch (domain) { |
881 | case LTTNG_DOMAIN_KERNEL: | |
882 | { | |
883 | ret = channel_kernel_disable(session->kernel_session, | |
884 | channel_name); | |
f73fabfd | 885 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
886 | goto error; |
887 | } | |
888 | ||
889 | kernel_wait_quiescent(kernel_tracer_fd); | |
890 | break; | |
891 | } | |
892 | case LTTNG_DOMAIN_UST: | |
893 | { | |
894 | struct ltt_ust_channel *uchan; | |
895 | struct lttng_ht *chan_ht; | |
896 | ||
897 | chan_ht = usess->domain_global.channels; | |
898 | ||
899 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
900 | if (uchan == NULL) { | |
f73fabfd | 901 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
902 | goto error; |
903 | } | |
904 | ||
7972aab2 | 905 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 906 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
907 | goto error; |
908 | } | |
909 | break; | |
910 | } | |
911 | #if 0 | |
912 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
913 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
914 | case LTTNG_DOMAIN_UST_PID: | |
915 | #endif | |
916 | default: | |
f73fabfd | 917 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
918 | goto error; |
919 | } | |
920 | ||
f73fabfd | 921 | ret = LTTNG_OK; |
2f77fc4b DG |
922 | |
923 | error: | |
2223c96f | 924 | rcu_read_unlock(); |
2f77fc4b DG |
925 | return ret; |
926 | } | |
927 | ||
928 | /* | |
929 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
930 | * | |
931 | * The wpipe arguments is used as a notifier for the kernel thread. | |
932 | */ | |
933 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 934 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
935 | { |
936 | int ret; | |
937 | struct ltt_ust_session *usess = session->ust_session; | |
938 | struct lttng_ht *chan_ht; | |
939 | ||
940 | assert(session); | |
941 | assert(attr); | |
7972aab2 | 942 | assert(domain); |
2f77fc4b DG |
943 | |
944 | DBG("Enabling channel %s for session %s", attr->name, session->name); | |
945 | ||
03b4fdcf DG |
946 | rcu_read_lock(); |
947 | ||
ecc48a90 JD |
948 | /* |
949 | * Don't try to enable a channel if the session has been started at | |
950 | * some point in time before. The tracer does not allow it. | |
951 | */ | |
8382cf6f | 952 | if (session->has_been_started) { |
ecc48a90 JD |
953 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
954 | goto error; | |
955 | } | |
956 | ||
957 | /* | |
958 | * If the session is a live session, remove the switch timer, the | |
959 | * live timer does the same thing but sends also synchronisation | |
960 | * beacons for inactive streams. | |
961 | */ | |
962 | if (session->live_timer > 0) { | |
963 | attr->attr.live_timer_interval = session->live_timer; | |
964 | attr->attr.switch_timer_interval = 0; | |
965 | } | |
966 | ||
33fbd469 DG |
967 | /* |
968 | * The ringbuffer (both in user space and kernel) behave badly in overwrite | |
969 | * mode and with less than 2 subbuf so block it right away and send back an | |
970 | * invalid attribute error. | |
971 | */ | |
972 | if (attr->attr.overwrite && attr->attr.num_subbuf < 2) { | |
973 | ret = LTTNG_ERR_INVALID; | |
974 | goto error; | |
975 | } | |
976 | ||
7972aab2 | 977 | switch (domain->type) { |
2f77fc4b DG |
978 | case LTTNG_DOMAIN_KERNEL: |
979 | { | |
980 | struct ltt_kernel_channel *kchan; | |
981 | ||
2f77fc4b DG |
982 | kchan = trace_kernel_get_channel_by_name(attr->name, |
983 | session->kernel_session); | |
984 | if (kchan == NULL) { | |
985 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
986 | if (attr->name[0] != '\0') { |
987 | session->kernel_session->has_non_default_channel = 1; | |
988 | } | |
2f77fc4b DG |
989 | } else { |
990 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
991 | } | |
992 | ||
f73fabfd | 993 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
994 | goto error; |
995 | } | |
996 | ||
784303b0 | 997 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
998 | break; |
999 | } | |
1000 | case LTTNG_DOMAIN_UST: | |
1001 | { | |
1002 | struct ltt_ust_channel *uchan; | |
1003 | ||
1004 | chan_ht = usess->domain_global.channels; | |
1005 | ||
1006 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
1007 | if (uchan == NULL) { | |
7972aab2 | 1008 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
1009 | if (attr->name[0] != '\0') { |
1010 | usess->has_non_default_channel = 1; | |
1011 | } | |
2f77fc4b | 1012 | } else { |
7972aab2 | 1013 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1014 | } |
1015 | break; | |
1016 | } | |
2f77fc4b | 1017 | default: |
f73fabfd | 1018 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1019 | goto error; |
1020 | } | |
1021 | ||
1022 | error: | |
2223c96f | 1023 | rcu_read_unlock(); |
2f77fc4b DG |
1024 | return ret; |
1025 | } | |
1026 | ||
1027 | ||
1028 | /* | |
1029 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1030 | */ | |
1031 | int cmd_disable_event(struct ltt_session *session, int domain, | |
6e911cad MD |
1032 | char *channel_name, |
1033 | struct lttng_event *event) | |
2f77fc4b DG |
1034 | { |
1035 | int ret; | |
6e911cad MD |
1036 | char *event_name; |
1037 | ||
18a720cd MD |
1038 | DBG("Disable event command for event \'%s\'", event->name); |
1039 | ||
6e911cad MD |
1040 | event_name = event->name; |
1041 | ||
1042 | if (event->loglevel_type || event->loglevel || event->enabled | |
1043 | || event->pid || event->filter || event->exclusion) { | |
1044 | return LTTNG_ERR_UNK; | |
1045 | } | |
18a720cd MD |
1046 | /* Special handling for kernel domain all events. */ |
1047 | if (domain == LTTNG_DOMAIN_KERNEL && !strcmp(event_name, "*")) { | |
1048 | return disable_kevent_all(session, domain, channel_name, event); | |
1049 | } | |
2f77fc4b | 1050 | |
2223c96f DG |
1051 | rcu_read_lock(); |
1052 | ||
2f77fc4b DG |
1053 | switch (domain) { |
1054 | case LTTNG_DOMAIN_KERNEL: | |
1055 | { | |
1056 | struct ltt_kernel_channel *kchan; | |
1057 | struct ltt_kernel_session *ksess; | |
1058 | ||
1059 | ksess = session->kernel_session; | |
1060 | ||
85076754 MD |
1061 | /* |
1062 | * If a non-default channel has been created in the | |
1063 | * session, explicitely require that -c chan_name needs | |
1064 | * to be provided. | |
1065 | */ | |
1066 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1067 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1068 | goto error; | |
1069 | } | |
1070 | ||
2f77fc4b DG |
1071 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1072 | if (kchan == NULL) { | |
f73fabfd | 1073 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1074 | goto error; |
1075 | } | |
1076 | ||
6e911cad MD |
1077 | switch (event->type) { |
1078 | case LTTNG_EVENT_ALL: | |
1079 | case LTTNG_EVENT_TRACEPOINT: | |
1080 | ret = event_kernel_disable_tracepoint(kchan, event_name); | |
1081 | if (ret != LTTNG_OK) { | |
1082 | goto error; | |
1083 | } | |
1084 | break; | |
1085 | case LTTNG_EVENT_SYSCALL: | |
1086 | ret = event_kernel_disable_syscall(kchan, event_name); | |
e2b957af MD |
1087 | if (ret != LTTNG_OK) { |
1088 | goto error; | |
1089 | } | |
6e911cad MD |
1090 | break; |
1091 | default: | |
1092 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1093 | goto error; |
1094 | } | |
1095 | ||
1096 | kernel_wait_quiescent(kernel_tracer_fd); | |
1097 | break; | |
1098 | } | |
1099 | case LTTNG_DOMAIN_UST: | |
1100 | { | |
1101 | struct ltt_ust_channel *uchan; | |
1102 | struct ltt_ust_session *usess; | |
1103 | ||
1104 | usess = session->ust_session; | |
1105 | ||
85076754 MD |
1106 | /* |
1107 | * If a non-default channel has been created in the | |
1108 | * session, explicitely require that -c chan_name needs | |
1109 | * to be provided. | |
1110 | */ | |
1111 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1112 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1113 | goto error; | |
1114 | } | |
1115 | ||
2f77fc4b DG |
1116 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1117 | channel_name); | |
1118 | if (uchan == NULL) { | |
f73fabfd | 1119 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1120 | goto error; |
1121 | } | |
1122 | ||
6e911cad MD |
1123 | switch (event->type) { |
1124 | case LTTNG_EVENT_ALL: | |
1125 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); | |
1126 | if (ret != LTTNG_OK) { | |
1127 | goto error; | |
1128 | } | |
1129 | break; | |
1130 | default: | |
1131 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1132 | goto error; |
1133 | } | |
1134 | ||
1135 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1136 | channel_name); | |
1137 | break; | |
1138 | } | |
5cdb6027 | 1139 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1140 | case LTTNG_DOMAIN_JUL: |
1141 | { | |
fefd409b | 1142 | struct agent *agt; |
f20baf8e DG |
1143 | struct ltt_ust_session *usess = session->ust_session; |
1144 | ||
1145 | assert(usess); | |
1146 | ||
6e911cad MD |
1147 | switch (event->type) { |
1148 | case LTTNG_EVENT_ALL: | |
1149 | break; | |
1150 | default: | |
1151 | ret = LTTNG_ERR_UNK; | |
1152 | goto error; | |
1153 | } | |
1154 | ||
5cdb6027 | 1155 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1156 | if (!agt) { |
1157 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
1158 | goto error; | |
1159 | } | |
18a720cd MD |
1160 | /* The wild card * means that everything should be disabled. */ |
1161 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
1162 | ret = event_agent_disable_all(usess, agt); | |
1163 | } else { | |
1164 | ret = event_agent_disable(usess, agt, event_name); | |
1165 | } | |
f20baf8e DG |
1166 | if (ret != LTTNG_OK) { |
1167 | goto error; | |
1168 | } | |
1169 | ||
1170 | break; | |
1171 | } | |
2f77fc4b DG |
1172 | #if 0 |
1173 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1174 | case LTTNG_DOMAIN_UST_PID: | |
1175 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1176 | #endif | |
1177 | default: | |
f73fabfd | 1178 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1179 | goto error; |
1180 | } | |
1181 | ||
f73fabfd | 1182 | ret = LTTNG_OK; |
2f77fc4b DG |
1183 | |
1184 | error: | |
2223c96f | 1185 | rcu_read_unlock(); |
2f77fc4b DG |
1186 | return ret; |
1187 | } | |
1188 | ||
1189 | /* | |
18a720cd | 1190 | * Command LTTNG_DISABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1191 | */ |
18a720cd MD |
1192 | static |
1193 | int disable_kevent_all(struct ltt_session *session, int domain, | |
6e911cad MD |
1194 | char *channel_name, |
1195 | struct lttng_event *event) | |
2f77fc4b DG |
1196 | { |
1197 | int ret; | |
1198 | ||
2223c96f DG |
1199 | rcu_read_lock(); |
1200 | ||
2f77fc4b DG |
1201 | switch (domain) { |
1202 | case LTTNG_DOMAIN_KERNEL: | |
1203 | { | |
1204 | struct ltt_kernel_session *ksess; | |
1205 | struct ltt_kernel_channel *kchan; | |
1206 | ||
1207 | ksess = session->kernel_session; | |
1208 | ||
85076754 MD |
1209 | /* |
1210 | * If a non-default channel has been created in the | |
1211 | * session, explicitely require that -c chan_name needs | |
1212 | * to be provided. | |
1213 | */ | |
1214 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1215 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1216 | goto error; | |
1217 | } | |
1218 | ||
2f77fc4b DG |
1219 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1220 | if (kchan == NULL) { | |
f73fabfd | 1221 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1222 | goto error; |
1223 | } | |
1224 | ||
6e911cad MD |
1225 | switch (event->type) { |
1226 | case LTTNG_EVENT_ALL: | |
1227 | ret = event_kernel_disable_all(kchan); | |
1228 | if (ret != LTTNG_OK) { | |
1229 | goto error; | |
1230 | } | |
1231 | break; | |
1232 | case LTTNG_EVENT_SYSCALL: | |
e2b957af MD |
1233 | ret = event_kernel_disable_syscall(kchan, ""); |
1234 | if (ret != LTTNG_OK) { | |
1235 | goto error; | |
1236 | } | |
6e911cad MD |
1237 | break; |
1238 | default: | |
1239 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1240 | goto error; |
1241 | } | |
1242 | ||
1243 | kernel_wait_quiescent(kernel_tracer_fd); | |
1244 | break; | |
1245 | } | |
2f77fc4b | 1246 | default: |
f73fabfd | 1247 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1248 | goto error; |
1249 | } | |
1250 | ||
f73fabfd | 1251 | ret = LTTNG_OK; |
2f77fc4b DG |
1252 | |
1253 | error: | |
2223c96f | 1254 | rcu_read_unlock(); |
2f77fc4b DG |
1255 | return ret; |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1260 | */ | |
1261 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1262 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1263 | { |
d5979e4a | 1264 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1265 | |
1266 | switch (domain) { | |
1267 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1268 | assert(session->kernel_session); |
1269 | ||
1270 | if (session->kernel_session->channel_count == 0) { | |
1271 | /* Create default channel */ | |
1272 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1273 | if (ret != LTTNG_OK) { | |
1274 | goto error; | |
1275 | } | |
d5979e4a | 1276 | chan_kern_created = 1; |
979e618e | 1277 | } |
2f77fc4b | 1278 | /* Add kernel context to kernel tracer */ |
601d5acf | 1279 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1280 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1281 | goto error; |
1282 | } | |
1283 | break; | |
1284 | case LTTNG_DOMAIN_UST: | |
1285 | { | |
1286 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1287 | unsigned int chan_count; |
1288 | ||
2f77fc4b DG |
1289 | assert(usess); |
1290 | ||
85076754 | 1291 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1292 | if (chan_count == 0) { |
1293 | struct lttng_channel *attr; | |
1294 | /* Create default channel */ | |
0a9c6494 | 1295 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1296 | if (attr == NULL) { |
1297 | ret = LTTNG_ERR_FATAL; | |
1298 | goto error; | |
1299 | } | |
1300 | ||
7972aab2 | 1301 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1302 | if (ret != LTTNG_OK) { |
1303 | free(attr); | |
1304 | goto error; | |
1305 | } | |
1306 | free(attr); | |
d5979e4a | 1307 | chan_ust_created = 1; |
979e618e DG |
1308 | } |
1309 | ||
601d5acf | 1310 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1311 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1312 | goto error; |
1313 | } | |
1314 | break; | |
1315 | } | |
1316 | #if 0 | |
1317 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1318 | case LTTNG_DOMAIN_UST_PID: | |
1319 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1320 | #endif | |
1321 | default: | |
f73fabfd | 1322 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1323 | goto error; |
1324 | } | |
1325 | ||
d5979e4a | 1326 | return LTTNG_OK; |
2f77fc4b DG |
1327 | |
1328 | error: | |
d5979e4a DG |
1329 | if (chan_kern_created) { |
1330 | struct ltt_kernel_channel *kchan = | |
1331 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1332 | session->kernel_session); | |
1333 | /* Created previously, this should NOT fail. */ | |
1334 | assert(kchan); | |
1335 | kernel_destroy_channel(kchan); | |
1336 | } | |
1337 | ||
1338 | if (chan_ust_created) { | |
1339 | struct ltt_ust_channel *uchan = | |
1340 | trace_ust_find_channel_by_name( | |
1341 | session->ust_session->domain_global.channels, | |
1342 | DEFAULT_CHANNEL_NAME); | |
1343 | /* Created previously, this should NOT fail. */ | |
1344 | assert(uchan); | |
1345 | /* Remove from the channel list of the session. */ | |
1346 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1347 | uchan); | |
1348 | trace_ust_destroy_channel(uchan); | |
1349 | } | |
2f77fc4b DG |
1350 | return ret; |
1351 | } | |
1352 | ||
930a2e99 JG |
1353 | static int validate_event_name(const char *name) |
1354 | { | |
1355 | int ret = 0; | |
1356 | const char *c = name; | |
1357 | const char *event_name_end = c + LTTNG_SYMBOL_NAME_LEN; | |
1358 | ||
1359 | /* | |
1360 | * Make sure that unescaped wildcards are only used as the last | |
1361 | * character of the event name. | |
1362 | */ | |
1363 | while (c < event_name_end) { | |
1364 | switch (*c) { | |
1365 | case '\0': | |
1366 | goto end; | |
1367 | case '\\': | |
1368 | c++; | |
1369 | break; | |
1370 | case '*': | |
1371 | if ((c + 1) < event_name_end && *(c + 1)) { | |
1372 | /* Wildcard is not the last character */ | |
1373 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1374 | goto end; | |
1375 | } | |
1376 | default: | |
1377 | break; | |
1378 | } | |
1379 | c++; | |
1380 | } | |
1381 | end: | |
1382 | return ret; | |
1383 | } | |
1384 | ||
2f77fc4b DG |
1385 | /* |
1386 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1387 | */ | |
7972aab2 | 1388 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 | 1389 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1390 | char *filter_expression, |
db8f1377 JI |
1391 | struct lttng_filter_bytecode *filter, |
1392 | struct lttng_event_exclusion *exclusion, | |
1393 | int wpipe) | |
2f77fc4b | 1394 | { |
e5f5db7f | 1395 | int ret, channel_created = 0; |
2f77fc4b DG |
1396 | struct lttng_channel *attr; |
1397 | ||
1398 | assert(session); | |
1399 | assert(event); | |
1400 | assert(channel_name); | |
1401 | ||
18a720cd MD |
1402 | DBG("Enable event command for event \'%s\'", event->name); |
1403 | ||
1404 | /* Special handling for kernel domain all events. */ | |
1405 | if (domain->type == LTTNG_DOMAIN_KERNEL && !strcmp(event->name, "*")) { | |
1406 | return enable_kevent_all(session, domain, channel_name, event, | |
1407 | filter_expression, filter, wpipe); | |
1408 | } | |
1409 | ||
930a2e99 JG |
1410 | ret = validate_event_name(event->name); |
1411 | if (ret) { | |
1412 | goto error; | |
1413 | } | |
1414 | ||
2223c96f DG |
1415 | rcu_read_lock(); |
1416 | ||
7972aab2 | 1417 | switch (domain->type) { |
2f77fc4b DG |
1418 | case LTTNG_DOMAIN_KERNEL: |
1419 | { | |
1420 | struct ltt_kernel_channel *kchan; | |
1421 | ||
85076754 MD |
1422 | /* |
1423 | * If a non-default channel has been created in the | |
1424 | * session, explicitely require that -c chan_name needs | |
1425 | * to be provided. | |
1426 | */ | |
1427 | if (session->kernel_session->has_non_default_channel | |
1428 | && channel_name[0] == '\0') { | |
1429 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1430 | goto error; | |
1431 | } | |
1432 | ||
2f77fc4b DG |
1433 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1434 | session->kernel_session); | |
1435 | if (kchan == NULL) { | |
0a9c6494 DG |
1436 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1437 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1438 | if (attr == NULL) { |
f73fabfd | 1439 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1440 | goto error; |
1441 | } | |
1442 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1443 | ||
1444 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1445 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1446 | free(attr); |
1447 | goto error; | |
1448 | } | |
1449 | free(attr); | |
e5f5db7f DG |
1450 | |
1451 | channel_created = 1; | |
2f77fc4b DG |
1452 | } |
1453 | ||
1454 | /* Get the newly created kernel channel pointer */ | |
1455 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1456 | session->kernel_session); | |
1457 | if (kchan == NULL) { | |
1458 | /* This sould not happen... */ | |
f73fabfd | 1459 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1460 | goto error; |
1461 | } | |
1462 | ||
6e911cad MD |
1463 | switch (event->type) { |
1464 | case LTTNG_EVENT_ALL: | |
1465 | case LTTNG_EVENT_TRACEPOINT: | |
1466 | ret = event_kernel_enable_tracepoint(kchan, event); | |
1467 | if (ret != LTTNG_OK) { | |
1468 | if (channel_created) { | |
1469 | /* Let's not leak a useless channel. */ | |
1470 | kernel_destroy_channel(kchan); | |
1471 | } | |
1472 | goto error; | |
e5f5db7f | 1473 | } |
6e911cad MD |
1474 | break; |
1475 | case LTTNG_EVENT_SYSCALL: | |
1476 | ret = event_kernel_enable_syscall(kchan, event->name); | |
e2b957af MD |
1477 | if (ret != LTTNG_OK) { |
1478 | goto error; | |
1479 | } | |
6e911cad MD |
1480 | break; |
1481 | default: | |
1482 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1483 | goto error; |
1484 | } | |
1485 | ||
1486 | kernel_wait_quiescent(kernel_tracer_fd); | |
1487 | break; | |
1488 | } | |
1489 | case LTTNG_DOMAIN_UST: | |
1490 | { | |
1491 | struct ltt_ust_channel *uchan; | |
1492 | struct ltt_ust_session *usess = session->ust_session; | |
1493 | ||
1494 | assert(usess); | |
1495 | ||
85076754 MD |
1496 | /* |
1497 | * If a non-default channel has been created in the | |
1498 | * session, explicitely require that -c chan_name needs | |
1499 | * to be provided. | |
1500 | */ | |
1501 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1502 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1503 | goto error; | |
1504 | } | |
1505 | ||
2f77fc4b DG |
1506 | /* Get channel from global UST domain */ |
1507 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1508 | channel_name); | |
1509 | if (uchan == NULL) { | |
1510 | /* Create default channel */ | |
0a9c6494 DG |
1511 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1512 | usess->buffer_type); | |
2f77fc4b | 1513 | if (attr == NULL) { |
f73fabfd | 1514 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1515 | goto error; |
1516 | } | |
1517 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1518 | ||
1519 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1520 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1521 | free(attr); |
1522 | goto error; | |
1523 | } | |
1524 | free(attr); | |
1525 | ||
1526 | /* Get the newly created channel reference back */ | |
1527 | uchan = trace_ust_find_channel_by_name( | |
1528 | usess->domain_global.channels, channel_name); | |
1529 | assert(uchan); | |
1530 | } | |
1531 | ||
1532 | /* At this point, the session and channel exist on the tracer */ | |
6b453b5e JG |
1533 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
1534 | filter_expression, filter, exclusion); | |
f73fabfd | 1535 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1536 | goto error; |
1537 | } | |
1538 | break; | |
1539 | } | |
5cdb6027 | 1540 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e DG |
1541 | case LTTNG_DOMAIN_JUL: |
1542 | { | |
da6c3a50 | 1543 | const char *default_event_name, *default_chan_name; |
fefd409b | 1544 | struct agent *agt; |
f20baf8e DG |
1545 | struct lttng_event uevent; |
1546 | struct lttng_domain tmp_dom; | |
1547 | struct ltt_ust_session *usess = session->ust_session; | |
1548 | ||
1549 | assert(usess); | |
1550 | ||
5cdb6027 | 1551 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 1552 | if (!agt) { |
5cdb6027 | 1553 | agt = agent_create(domain->type); |
fefd409b DG |
1554 | if (!agt) { |
1555 | ret = -LTTNG_ERR_NOMEM; | |
1556 | goto error; | |
1557 | } | |
1558 | agent_add(agt, usess->agents); | |
1559 | } | |
1560 | ||
022d91ba | 1561 | /* Create the default tracepoint. */ |
996de3c7 | 1562 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
1563 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1564 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
da6c3a50 DG |
1565 | default_event_name = event_get_default_agent_ust_name(domain->type); |
1566 | if (!default_event_name) { | |
1567 | ret = -LTTNG_ERR_FATAL; | |
1568 | goto error; | |
f43f95a9 | 1569 | } |
da6c3a50 | 1570 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
1571 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1572 | ||
1573 | /* | |
1574 | * The domain type is changed because we are about to enable the | |
1575 | * default channel and event for the JUL domain that are hardcoded. | |
1576 | * This happens in the UST domain. | |
1577 | */ | |
1578 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1579 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1580 | ||
da6c3a50 DG |
1581 | if (domain->type == LTTNG_DOMAIN_LOG4J) { |
1582 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
1583 | } else { | |
1584 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; | |
1585 | } | |
1586 | ||
1587 | ret = cmd_enable_event(session, &tmp_dom, (char *) default_chan_name, | |
9b21e6d5 | 1588 | &uevent, filter_expression, filter, NULL, wpipe); |
f20baf8e DG |
1589 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1590 | goto error; | |
1591 | } | |
1592 | ||
1593 | /* The wild card * means that everything should be enabled. */ | |
1594 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
fefd409b | 1595 | ret = event_agent_enable_all(usess, agt, event, filter); |
f20baf8e | 1596 | } else { |
fefd409b | 1597 | ret = event_agent_enable(usess, agt, event, filter); |
f20baf8e DG |
1598 | } |
1599 | if (ret != LTTNG_OK) { | |
1600 | goto error; | |
1601 | } | |
1602 | ||
1603 | break; | |
1604 | } | |
2f77fc4b DG |
1605 | #if 0 |
1606 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1607 | case LTTNG_DOMAIN_UST_PID: | |
1608 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1609 | #endif | |
1610 | default: | |
f73fabfd | 1611 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1612 | goto error; |
1613 | } | |
1614 | ||
f73fabfd | 1615 | ret = LTTNG_OK; |
2f77fc4b DG |
1616 | |
1617 | error: | |
2223c96f | 1618 | rcu_read_unlock(); |
2f77fc4b DG |
1619 | return ret; |
1620 | } | |
1621 | ||
1622 | /* | |
18a720cd | 1623 | * Command LTTNG_ENABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1624 | */ |
18a720cd MD |
1625 | static |
1626 | int enable_kevent_all(struct ltt_session *session, | |
1627 | struct lttng_domain *domain, char *channel_name, | |
1628 | struct lttng_event *event, | |
6b453b5e | 1629 | char *filter_expression, |
025faf73 | 1630 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1631 | { |
1632 | int ret; | |
1633 | struct lttng_channel *attr; | |
1634 | ||
1635 | assert(session); | |
1636 | assert(channel_name); | |
1637 | ||
2223c96f DG |
1638 | rcu_read_lock(); |
1639 | ||
7972aab2 | 1640 | switch (domain->type) { |
2f77fc4b DG |
1641 | case LTTNG_DOMAIN_KERNEL: |
1642 | { | |
1643 | struct ltt_kernel_channel *kchan; | |
1644 | ||
1645 | assert(session->kernel_session); | |
1646 | ||
85076754 MD |
1647 | /* |
1648 | * If a non-default channel has been created in the | |
1649 | * session, explicitely require that -c chan_name needs | |
1650 | * to be provided. | |
1651 | */ | |
1652 | if (session->kernel_session->has_non_default_channel | |
1653 | && channel_name[0] == '\0') { | |
1654 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1655 | goto error; | |
1656 | } | |
1657 | ||
2f77fc4b DG |
1658 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1659 | session->kernel_session); | |
1660 | if (kchan == NULL) { | |
1661 | /* Create default channel */ | |
0a9c6494 DG |
1662 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1663 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1664 | if (attr == NULL) { |
f73fabfd | 1665 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1666 | goto error; |
1667 | } | |
1668 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1669 | ||
1670 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1671 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1672 | free(attr); |
1673 | goto error; | |
1674 | } | |
1675 | free(attr); | |
1676 | ||
1677 | /* Get the newly created kernel channel pointer */ | |
1678 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1679 | session->kernel_session); | |
1680 | assert(kchan); | |
1681 | } | |
1682 | ||
18a720cd | 1683 | switch (event->type) { |
2f77fc4b | 1684 | case LTTNG_EVENT_SYSCALL: |
6e911cad | 1685 | ret = event_kernel_enable_syscall(kchan, ""); |
e2b957af MD |
1686 | if (ret != LTTNG_OK) { |
1687 | goto error; | |
1688 | } | |
2f77fc4b DG |
1689 | break; |
1690 | case LTTNG_EVENT_TRACEPOINT: | |
1691 | /* | |
1692 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1693 | * events already registered to the channel. | |
1694 | */ | |
d3a56674 | 1695 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1696 | break; |
1697 | case LTTNG_EVENT_ALL: | |
1698 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1699 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1700 | break; |
1701 | default: | |
f73fabfd | 1702 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1703 | goto error; |
1704 | } | |
1705 | ||
1706 | /* Manage return value */ | |
f73fabfd | 1707 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1708 | /* |
1709 | * On error, cmd_enable_channel call will take care of destroying | |
1710 | * the created channel if it was needed. | |
1711 | */ | |
2f77fc4b DG |
1712 | goto error; |
1713 | } | |
1714 | ||
1715 | kernel_wait_quiescent(kernel_tracer_fd); | |
1716 | break; | |
1717 | } | |
2f77fc4b | 1718 | default: |
f73fabfd | 1719 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1720 | goto error; |
1721 | } | |
1722 | ||
f73fabfd | 1723 | ret = LTTNG_OK; |
2f77fc4b DG |
1724 | |
1725 | error: | |
2223c96f | 1726 | rcu_read_unlock(); |
2f77fc4b DG |
1727 | return ret; |
1728 | } | |
1729 | ||
1730 | ||
1731 | /* | |
1732 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1733 | */ | |
1734 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1735 | { | |
1736 | int ret; | |
1737 | ssize_t nb_events = 0; | |
1738 | ||
1739 | switch (domain) { | |
1740 | case LTTNG_DOMAIN_KERNEL: | |
1741 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1742 | if (nb_events < 0) { | |
f73fabfd | 1743 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1744 | goto error; |
1745 | } | |
1746 | break; | |
1747 | case LTTNG_DOMAIN_UST: | |
1748 | nb_events = ust_app_list_events(events); | |
1749 | if (nb_events < 0) { | |
f73fabfd | 1750 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1751 | goto error; |
1752 | } | |
1753 | break; | |
5cdb6027 | 1754 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 1755 | case LTTNG_DOMAIN_JUL: |
f60140a1 | 1756 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
1757 | if (nb_events < 0) { |
1758 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1759 | goto error; | |
1760 | } | |
1761 | break; | |
2f77fc4b | 1762 | default: |
f73fabfd | 1763 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1764 | goto error; |
1765 | } | |
1766 | ||
1767 | return nb_events; | |
1768 | ||
1769 | error: | |
1770 | /* Return negative value to differentiate return code */ | |
1771 | return -ret; | |
1772 | } | |
1773 | ||
1774 | /* | |
1775 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1776 | */ | |
1777 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1778 | struct lttng_event_field **fields) | |
1779 | { | |
1780 | int ret; | |
1781 | ssize_t nb_fields = 0; | |
1782 | ||
1783 | switch (domain) { | |
1784 | case LTTNG_DOMAIN_UST: | |
1785 | nb_fields = ust_app_list_event_fields(fields); | |
1786 | if (nb_fields < 0) { | |
f73fabfd | 1787 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1788 | goto error; |
1789 | } | |
1790 | break; | |
1791 | case LTTNG_DOMAIN_KERNEL: | |
1792 | default: /* fall-through */ | |
f73fabfd | 1793 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1794 | goto error; |
1795 | } | |
1796 | ||
1797 | return nb_fields; | |
1798 | ||
1799 | error: | |
1800 | /* Return negative value to differentiate return code */ | |
1801 | return -ret; | |
1802 | } | |
1803 | ||
834978fd DG |
1804 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
1805 | { | |
1806 | return syscall_table_list(events); | |
1807 | } | |
1808 | ||
2f77fc4b DG |
1809 | /* |
1810 | * Command LTTNG_START_TRACE processed by the client thread. | |
1811 | */ | |
1812 | int cmd_start_trace(struct ltt_session *session) | |
1813 | { | |
1814 | int ret; | |
cde3e505 | 1815 | unsigned long nb_chan = 0; |
2f77fc4b DG |
1816 | struct ltt_kernel_session *ksession; |
1817 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1818 | |
1819 | assert(session); | |
1820 | ||
1821 | /* Ease our life a bit ;) */ | |
1822 | ksession = session->kernel_session; | |
1823 | usess = session->ust_session; | |
1824 | ||
8382cf6f DG |
1825 | /* Is the session already started? */ |
1826 | if (session->active) { | |
f73fabfd | 1827 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1828 | goto error; |
1829 | } | |
1830 | ||
cde3e505 DG |
1831 | /* |
1832 | * Starting a session without channel is useless since after that it's not | |
1833 | * possible to enable channel thus inform the client. | |
1834 | */ | |
1835 | if (usess && usess->domain_global.channels) { | |
1836 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); | |
1837 | } | |
1838 | if (ksession) { | |
1839 | nb_chan += ksession->channel_count; | |
1840 | } | |
1841 | if (!nb_chan) { | |
1842 | ret = LTTNG_ERR_NO_CHANNEL; | |
1843 | goto error; | |
1844 | } | |
1845 | ||
2f77fc4b DG |
1846 | /* Kernel tracing */ |
1847 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1848 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1849 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1850 | goto error; |
1851 | } | |
2f77fc4b DG |
1852 | } |
1853 | ||
1854 | /* Flag session that trace should start automatically */ | |
1855 | if (usess) { | |
14fb1ebe DG |
1856 | /* |
1857 | * Even though the start trace might fail, flag this session active so | |
1858 | * other application coming in are started by default. | |
1859 | */ | |
1860 | usess->active = 1; | |
2f77fc4b DG |
1861 | |
1862 | ret = ust_app_start_trace_all(usess); | |
1863 | if (ret < 0) { | |
f73fabfd | 1864 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
1865 | goto error; |
1866 | } | |
1867 | } | |
1868 | ||
8382cf6f DG |
1869 | /* Flag this after a successful start. */ |
1870 | session->has_been_started = 1; | |
1871 | session->active = 1; | |
9b6c7ec5 | 1872 | |
f73fabfd | 1873 | ret = LTTNG_OK; |
2f77fc4b DG |
1874 | |
1875 | error: | |
1876 | return ret; | |
1877 | } | |
1878 | ||
1879 | /* | |
1880 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
1881 | */ | |
1882 | int cmd_stop_trace(struct ltt_session *session) | |
1883 | { | |
1884 | int ret; | |
1885 | struct ltt_kernel_channel *kchan; | |
1886 | struct ltt_kernel_session *ksession; | |
1887 | struct ltt_ust_session *usess; | |
1888 | ||
1889 | assert(session); | |
1890 | ||
1891 | /* Short cut */ | |
1892 | ksession = session->kernel_session; | |
1893 | usess = session->ust_session; | |
1894 | ||
8382cf6f DG |
1895 | /* Session is not active. Skip everythong and inform the client. */ |
1896 | if (!session->active) { | |
f73fabfd | 1897 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
1898 | goto error; |
1899 | } | |
1900 | ||
2f77fc4b | 1901 | /* Kernel tracer */ |
14fb1ebe | 1902 | if (ksession && ksession->active) { |
2f77fc4b DG |
1903 | DBG("Stop kernel tracing"); |
1904 | ||
1905 | /* Flush metadata if exist */ | |
1906 | if (ksession->metadata_stream_fd >= 0) { | |
1907 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
1908 | if (ret < 0) { | |
1909 | ERR("Kernel metadata flush failed"); | |
1910 | } | |
1911 | } | |
1912 | ||
1913 | /* Flush all buffers before stopping */ | |
1914 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
1915 | ret = kernel_flush_buffer(kchan); | |
1916 | if (ret < 0) { | |
1917 | ERR("Kernel flush buffer error"); | |
1918 | } | |
1919 | } | |
1920 | ||
1921 | ret = kernel_stop_session(ksession); | |
1922 | if (ret < 0) { | |
f73fabfd | 1923 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
1924 | goto error; |
1925 | } | |
1926 | ||
1927 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 | 1928 | |
14fb1ebe | 1929 | ksession->active = 0; |
2f77fc4b DG |
1930 | } |
1931 | ||
14fb1ebe DG |
1932 | if (usess && usess->active) { |
1933 | /* | |
1934 | * Even though the stop trace might fail, flag this session inactive so | |
1935 | * other application coming in are not started by default. | |
1936 | */ | |
1937 | usess->active = 0; | |
2f77fc4b DG |
1938 | |
1939 | ret = ust_app_stop_trace_all(usess); | |
1940 | if (ret < 0) { | |
f73fabfd | 1941 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
1942 | goto error; |
1943 | } | |
1944 | } | |
1945 | ||
8382cf6f DG |
1946 | /* Flag inactive after a successful stop. */ |
1947 | session->active = 0; | |
f73fabfd | 1948 | ret = LTTNG_OK; |
2f77fc4b DG |
1949 | |
1950 | error: | |
1951 | return ret; | |
1952 | } | |
1953 | ||
1954 | /* | |
1955 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
1956 | */ | |
1957 | int cmd_set_consumer_uri(int domain, struct ltt_session *session, | |
1958 | size_t nb_uri, struct lttng_uri *uris) | |
1959 | { | |
1960 | int ret, i; | |
1961 | struct ltt_kernel_session *ksess = session->kernel_session; | |
1962 | struct ltt_ust_session *usess = session->ust_session; | |
1963 | struct consumer_output *consumer = NULL; | |
1964 | ||
1965 | assert(session); | |
1966 | assert(uris); | |
1967 | assert(nb_uri > 0); | |
1968 | ||
8382cf6f DG |
1969 | /* Can't set consumer URI if the session is active. */ |
1970 | if (session->active) { | |
f73fabfd | 1971 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1972 | goto error; |
1973 | } | |
1974 | ||
2f77fc4b DG |
1975 | /* |
1976 | * This case switch makes sure the domain session has a temporary consumer | |
1977 | * so the URL can be set. | |
1978 | */ | |
1979 | switch (domain) { | |
1980 | case 0: | |
1981 | /* Code flow error. A session MUST always have a consumer object */ | |
1982 | assert(session->consumer); | |
1983 | /* | |
1984 | * The URL will be added to the tracing session consumer instead of a | |
1985 | * specific domain consumer. | |
1986 | */ | |
1987 | consumer = session->consumer; | |
1988 | break; | |
1989 | case LTTNG_DOMAIN_KERNEL: | |
1990 | /* Code flow error if we don't have a kernel session here. */ | |
1991 | assert(ksess); | |
785d2d0d DG |
1992 | assert(ksess->consumer); |
1993 | consumer = ksess->consumer; | |
2f77fc4b DG |
1994 | break; |
1995 | case LTTNG_DOMAIN_UST: | |
1996 | /* Code flow error if we don't have a kernel session here. */ | |
1997 | assert(usess); | |
785d2d0d DG |
1998 | assert(usess->consumer); |
1999 | consumer = usess->consumer; | |
2f77fc4b DG |
2000 | break; |
2001 | } | |
2002 | ||
2003 | for (i = 0; i < nb_uri; i++) { | |
2f77fc4b | 2004 | ret = add_uri_to_consumer(consumer, &uris[i], domain, session->name); |
a74934ba | 2005 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2006 | goto error; |
2007 | } | |
2f77fc4b DG |
2008 | } |
2009 | ||
7ab70fe0 DG |
2010 | /* |
2011 | * Make sure to set the session in output mode after we set URI since a | |
2012 | * session can be created without URL (thus flagged in no output mode). | |
2013 | */ | |
2014 | session->output_traces = 1; | |
2015 | if (ksess) { | |
2016 | ksess->output_traces = 1; | |
2017 | } else if (usess) { | |
2018 | usess->output_traces = 1; | |
2019 | } | |
2020 | ||
2f77fc4b | 2021 | /* All good! */ |
f73fabfd | 2022 | ret = LTTNG_OK; |
2f77fc4b DG |
2023 | |
2024 | error: | |
2025 | return ret; | |
2026 | } | |
2027 | ||
2028 | /* | |
2029 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2030 | */ | |
2031 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2032 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2033 | { |
2034 | int ret; | |
2f77fc4b DG |
2035 | struct ltt_session *session; |
2036 | ||
2037 | assert(name); | |
2bba9e53 | 2038 | assert(creds); |
785d2d0d | 2039 | |
2f77fc4b DG |
2040 | /* |
2041 | * Verify if the session already exist | |
2042 | * | |
2043 | * XXX: There is no need for the session lock list here since the caller | |
2044 | * (process_client_msg) is holding it. We might want to change that so a | |
2045 | * single command does not lock the entire session list. | |
2046 | */ | |
2047 | session = session_find_by_name(name); | |
2048 | if (session != NULL) { | |
f73fabfd | 2049 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2050 | goto find_error; |
2051 | } | |
2052 | ||
2053 | /* Create tracing session in the registry */ | |
dec56f6c | 2054 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2055 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2056 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2057 | goto session_error; |
2058 | } | |
2059 | ||
2060 | /* | |
2061 | * Get the newly created session pointer back | |
2062 | * | |
2063 | * XXX: There is no need for the session lock list here since the caller | |
2064 | * (process_client_msg) is holding it. We might want to change that so a | |
2065 | * single command does not lock the entire session list. | |
2066 | */ | |
2067 | session = session_find_by_name(name); | |
2068 | assert(session); | |
2069 | ||
ecc48a90 | 2070 | session->live_timer = live_timer; |
2f77fc4b DG |
2071 | /* Create default consumer output for the session not yet created. */ |
2072 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2073 | if (session->consumer == NULL) { | |
f73fabfd | 2074 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2075 | goto consumer_error; |
2076 | } | |
2077 | ||
2bba9e53 DG |
2078 | if (uris) { |
2079 | ret = cmd_set_consumer_uri(0, session, nb_uri, uris); | |
2080 | if (ret != LTTNG_OK) { | |
2081 | goto consumer_error; | |
2082 | } | |
2083 | session->output_traces = 1; | |
2084 | } else { | |
2085 | session->output_traces = 0; | |
2086 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2087 | } |
2088 | ||
2089 | session->consumer->enabled = 1; | |
2090 | ||
f73fabfd | 2091 | return LTTNG_OK; |
2f77fc4b DG |
2092 | |
2093 | consumer_error: | |
2094 | session_destroy(session); | |
2095 | session_error: | |
2096 | find_error: | |
2097 | return ret; | |
2098 | } | |
2099 | ||
27babd3a DG |
2100 | /* |
2101 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2102 | */ | |
2103 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2104 | size_t nb_uri, lttng_sock_cred *creds) | |
2105 | { | |
2106 | int ret; | |
2107 | struct ltt_session *session; | |
2108 | struct snapshot_output *new_output = NULL; | |
2109 | ||
2110 | assert(name); | |
2111 | assert(creds); | |
2112 | ||
2113 | /* | |
2114 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2115 | * received are for a default snapshot output if one. | |
2116 | */ | |
ecc48a90 | 2117 | ret = cmd_create_session_uri(name, NULL, 0, creds, -1); |
27babd3a DG |
2118 | if (ret != LTTNG_OK) { |
2119 | goto error; | |
2120 | } | |
2121 | ||
2122 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2123 | session = session_find_by_name(name); | |
2124 | assert(session); | |
2125 | ||
2126 | /* Flag session for snapshot mode. */ | |
2127 | session->snapshot_mode = 1; | |
2128 | ||
2129 | /* Skip snapshot output creation if no URI is given. */ | |
2130 | if (nb_uri == 0) { | |
2131 | goto end; | |
2132 | } | |
2133 | ||
2134 | new_output = snapshot_output_alloc(); | |
2135 | if (!new_output) { | |
2136 | ret = LTTNG_ERR_NOMEM; | |
2137 | goto error_snapshot_alloc; | |
2138 | } | |
2139 | ||
2140 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2141 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2142 | if (ret < 0) { | |
2143 | if (ret == -ENOMEM) { | |
2144 | ret = LTTNG_ERR_NOMEM; | |
2145 | } else { | |
2146 | ret = LTTNG_ERR_INVALID; | |
2147 | } | |
2148 | goto error_snapshot; | |
2149 | } | |
2150 | ||
2151 | rcu_read_lock(); | |
2152 | snapshot_add_output(&session->snapshot, new_output); | |
2153 | rcu_read_unlock(); | |
2154 | ||
2155 | end: | |
2156 | return LTTNG_OK; | |
2157 | ||
2158 | error_snapshot: | |
2159 | snapshot_output_destroy(new_output); | |
2160 | error_snapshot_alloc: | |
2161 | session_destroy(session); | |
2162 | error: | |
2163 | return ret; | |
2164 | } | |
2165 | ||
2f77fc4b DG |
2166 | /* |
2167 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2168 | */ | |
2169 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2170 | { | |
2171 | int ret; | |
2172 | struct ltt_ust_session *usess; | |
2173 | struct ltt_kernel_session *ksess; | |
2174 | ||
2175 | /* Safety net */ | |
2176 | assert(session); | |
2177 | ||
2178 | usess = session->ust_session; | |
2179 | ksess = session->kernel_session; | |
2180 | ||
2181 | /* Clean kernel session teardown */ | |
2182 | kernel_destroy_session(ksess); | |
2183 | ||
2184 | /* UST session teardown */ | |
2185 | if (usess) { | |
2186 | /* Close any relayd session */ | |
2187 | consumer_output_send_destroy_relayd(usess->consumer); | |
2188 | ||
2189 | /* Destroy every UST application related to this session. */ | |
2190 | ret = ust_app_destroy_trace_all(usess); | |
2191 | if (ret) { | |
2192 | ERR("Error in ust_app_destroy_trace_all"); | |
2193 | } | |
2194 | ||
2195 | /* Clean up the rest. */ | |
2196 | trace_ust_destroy_session(usess); | |
2197 | } | |
2198 | ||
2199 | /* | |
2200 | * Must notify the kernel thread here to update it's poll set in order to | |
2201 | * remove the channel(s)' fd just destroyed. | |
2202 | */ | |
2203 | ret = notify_thread_pipe(wpipe); | |
2204 | if (ret < 0) { | |
2205 | PERROR("write kernel poll pipe"); | |
2206 | } | |
2207 | ||
2208 | ret = session_destroy(session); | |
2209 | ||
2210 | return ret; | |
2211 | } | |
2212 | ||
2213 | /* | |
2214 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2215 | */ | |
2216 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2217 | { | |
2218 | int ret; | |
2219 | ||
2220 | switch (domain) { | |
2221 | case LTTNG_DOMAIN_KERNEL: | |
2222 | { | |
2223 | struct lttng_kernel_calibrate kcalibrate; | |
2224 | ||
2e84128e DG |
2225 | switch (calibrate->type) { |
2226 | case LTTNG_CALIBRATE_FUNCTION: | |
2227 | default: | |
2228 | /* Default and only possible calibrate option. */ | |
2229 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2230 | break; | |
2231 | } | |
2232 | ||
2f77fc4b DG |
2233 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2234 | if (ret < 0) { | |
f73fabfd | 2235 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2236 | goto error; |
2237 | } | |
2238 | break; | |
2239 | } | |
2240 | case LTTNG_DOMAIN_UST: | |
2241 | { | |
2242 | struct lttng_ust_calibrate ucalibrate; | |
2243 | ||
2e84128e DG |
2244 | switch (calibrate->type) { |
2245 | case LTTNG_CALIBRATE_FUNCTION: | |
2246 | default: | |
2247 | /* Default and only possible calibrate option. */ | |
2248 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2249 | break; | |
2250 | } | |
2251 | ||
2f77fc4b DG |
2252 | ret = ust_app_calibrate_glb(&ucalibrate); |
2253 | if (ret < 0) { | |
f73fabfd | 2254 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2255 | goto error; |
2256 | } | |
2257 | break; | |
2258 | } | |
2259 | default: | |
f73fabfd | 2260 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2261 | goto error; |
2262 | } | |
2263 | ||
f73fabfd | 2264 | ret = LTTNG_OK; |
2f77fc4b DG |
2265 | |
2266 | error: | |
2267 | return ret; | |
2268 | } | |
2269 | ||
2270 | /* | |
2271 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2272 | */ | |
2273 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2274 | const char *sock_path, struct consumer_data *cdata) | |
2275 | { | |
2276 | int ret, sock; | |
dd81b457 | 2277 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2278 | |
2279 | assert(session); | |
2280 | assert(cdata); | |
2281 | assert(sock_path); | |
2282 | ||
2283 | switch (domain) { | |
2284 | case LTTNG_DOMAIN_KERNEL: | |
2285 | { | |
2286 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2287 | ||
2288 | assert(ksess); | |
2289 | ||
2290 | /* Can't register a consumer if there is already one */ | |
2291 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2292 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2293 | goto error; |
2294 | } | |
2295 | ||
2296 | sock = lttcomm_connect_unix_sock(sock_path); | |
2297 | if (sock < 0) { | |
f73fabfd | 2298 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2299 | goto error; |
2300 | } | |
4ce514c4 | 2301 | cdata->cmd_sock = sock; |
2f77fc4b | 2302 | |
4ce514c4 | 2303 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2304 | if (socket == NULL) { |
f66c074c DG |
2305 | ret = close(sock); |
2306 | if (ret < 0) { | |
2307 | PERROR("close register consumer"); | |
2308 | } | |
4ce514c4 | 2309 | cdata->cmd_sock = -1; |
f73fabfd | 2310 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2311 | goto error; |
2312 | } | |
2313 | ||
2314 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2315 | if (socket->lock == NULL) { | |
2316 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2317 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2318 | goto error; |
2319 | } | |
2320 | pthread_mutex_init(socket->lock, NULL); | |
2321 | socket->registered = 1; | |
2322 | ||
2323 | rcu_read_lock(); | |
2324 | consumer_add_socket(socket, ksess->consumer); | |
2325 | rcu_read_unlock(); | |
2326 | ||
2327 | pthread_mutex_lock(&cdata->pid_mutex); | |
2328 | cdata->pid = -1; | |
2329 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2330 | ||
2331 | break; | |
2332 | } | |
2333 | default: | |
2334 | /* TODO: Userspace tracing */ | |
f73fabfd | 2335 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2336 | goto error; |
2337 | } | |
2338 | ||
dd81b457 | 2339 | return LTTNG_OK; |
2f77fc4b DG |
2340 | |
2341 | error: | |
dd81b457 DG |
2342 | if (socket) { |
2343 | consumer_destroy_socket(socket); | |
2344 | } | |
2f77fc4b DG |
2345 | return ret; |
2346 | } | |
2347 | ||
2348 | /* | |
2349 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2350 | */ | |
2351 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2352 | struct lttng_domain **domains) | |
2353 | { | |
2354 | int ret, index = 0; | |
2355 | ssize_t nb_dom = 0; | |
fefd409b DG |
2356 | struct agent *agt; |
2357 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2358 | |
2359 | if (session->kernel_session != NULL) { | |
2360 | DBG3("Listing domains found kernel domain"); | |
2361 | nb_dom++; | |
2362 | } | |
2363 | ||
2364 | if (session->ust_session != NULL) { | |
2365 | DBG3("Listing domains found UST global domain"); | |
2366 | nb_dom++; | |
3c6a091f | 2367 | |
fefd409b DG |
2368 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2369 | agt, node.node) { | |
2370 | if (agt->being_used) { | |
2371 | nb_dom++; | |
2372 | } | |
3c6a091f | 2373 | } |
2f77fc4b DG |
2374 | } |
2375 | ||
2376 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); | |
2377 | if (*domains == NULL) { | |
f73fabfd | 2378 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2379 | goto error; |
2380 | } | |
2381 | ||
2382 | if (session->kernel_session != NULL) { | |
2383 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
2384 | index++; | |
2385 | } | |
2386 | ||
2387 | if (session->ust_session != NULL) { | |
2388 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2389 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2390 | index++; |
3c6a091f | 2391 | |
fefd409b DG |
2392 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2393 | agt, node.node) { | |
2394 | if (agt->being_used) { | |
2395 | (*domains)[index].type = agt->domain; | |
2396 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2397 | index++; | |
2398 | } | |
3c6a091f | 2399 | } |
2f77fc4b DG |
2400 | } |
2401 | ||
2402 | return nb_dom; | |
2403 | ||
2404 | error: | |
f73fabfd DG |
2405 | /* Return negative value to differentiate return code */ |
2406 | return -ret; | |
2f77fc4b DG |
2407 | } |
2408 | ||
2409 | ||
2410 | /* | |
2411 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2412 | */ | |
2413 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2414 | struct lttng_channel **channels) | |
2415 | { | |
2416 | int ret; | |
2417 | ssize_t nb_chan = 0; | |
2418 | ||
2419 | switch (domain) { | |
2420 | case LTTNG_DOMAIN_KERNEL: | |
2421 | if (session->kernel_session != NULL) { | |
2422 | nb_chan = session->kernel_session->channel_count; | |
2423 | } | |
2424 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2425 | if (nb_chan <= 0) { |
2426 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2427 | } | |
2f77fc4b DG |
2428 | break; |
2429 | case LTTNG_DOMAIN_UST: | |
2430 | if (session->ust_session != NULL) { | |
2431 | nb_chan = lttng_ht_get_count( | |
2432 | session->ust_session->domain_global.channels); | |
2433 | } | |
2434 | DBG3("Number of UST global channels %zd", nb_chan); | |
c7d620a2 DG |
2435 | if (nb_chan <= 0) { |
2436 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
2437 | } | |
2f77fc4b DG |
2438 | break; |
2439 | default: | |
2440 | *channels = NULL; | |
f73fabfd | 2441 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2442 | goto error; |
2443 | } | |
2444 | ||
2445 | if (nb_chan > 0) { | |
2446 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2447 | if (*channels == NULL) { | |
f73fabfd | 2448 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2449 | goto error; |
2450 | } | |
2451 | ||
2452 | list_lttng_channels(domain, session, *channels); | |
2453 | } else { | |
2454 | *channels = NULL; | |
c7d620a2 DG |
2455 | /* Ret value was set in the domain switch case */ |
2456 | goto error; | |
2f77fc4b DG |
2457 | } |
2458 | ||
2459 | return nb_chan; | |
2460 | ||
2461 | error: | |
f73fabfd DG |
2462 | /* Return negative value to differentiate return code */ |
2463 | return -ret; | |
2f77fc4b DG |
2464 | } |
2465 | ||
2466 | /* | |
2467 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2468 | */ | |
2469 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2470 | char *channel_name, struct lttng_event **events) | |
2471 | { | |
2472 | int ret = 0; | |
2473 | ssize_t nb_event = 0; | |
2474 | ||
2475 | switch (domain) { | |
2476 | case LTTNG_DOMAIN_KERNEL: | |
2477 | if (session->kernel_session != NULL) { | |
2478 | nb_event = list_lttng_kernel_events(channel_name, | |
2479 | session->kernel_session, events); | |
2480 | } | |
2481 | break; | |
2482 | case LTTNG_DOMAIN_UST: | |
2483 | { | |
2484 | if (session->ust_session != NULL) { | |
2485 | nb_event = list_lttng_ust_global_events(channel_name, | |
2486 | &session->ust_session->domain_global, events); | |
2487 | } | |
2488 | break; | |
2489 | } | |
5cdb6027 | 2490 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f DG |
2491 | case LTTNG_DOMAIN_JUL: |
2492 | if (session->ust_session) { | |
fefd409b DG |
2493 | struct lttng_ht_iter iter; |
2494 | struct agent *agt; | |
2495 | ||
2496 | cds_lfht_for_each_entry(session->ust_session->agents->ht, | |
2497 | &iter.iter, agt, node.node) { | |
2498 | nb_event = list_lttng_agent_events(agt, events); | |
2499 | } | |
3c6a091f DG |
2500 | } |
2501 | break; | |
2f77fc4b | 2502 | default: |
f73fabfd | 2503 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2504 | goto error; |
2505 | } | |
2506 | ||
f73fabfd | 2507 | return nb_event; |
2f77fc4b DG |
2508 | |
2509 | error: | |
f73fabfd DG |
2510 | /* Return negative value to differentiate return code */ |
2511 | return -ret; | |
2f77fc4b DG |
2512 | } |
2513 | ||
2514 | /* | |
2515 | * Using the session list, filled a lttng_session array to send back to the | |
2516 | * client for session listing. | |
2517 | * | |
2518 | * The session list lock MUST be acquired before calling this function. Use | |
2519 | * session_lock_list() and session_unlock_list(). | |
2520 | */ | |
2521 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2522 | gid_t gid) | |
2523 | { | |
2524 | int ret; | |
2525 | unsigned int i = 0; | |
2526 | struct ltt_session *session; | |
2527 | struct ltt_session_list *list = session_get_list(); | |
2528 | ||
2529 | DBG("Getting all available session for UID %d GID %d", | |
2530 | uid, gid); | |
2531 | /* | |
2532 | * Iterate over session list and append data after the control struct in | |
2533 | * the buffer. | |
2534 | */ | |
2535 | cds_list_for_each_entry(session, &list->head, list) { | |
2536 | /* | |
2537 | * Only list the sessions the user can control. | |
2538 | */ | |
2539 | if (!session_access_ok(session, uid, gid)) { | |
2540 | continue; | |
2541 | } | |
2542 | ||
2543 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2544 | struct ltt_ust_session *usess = session->ust_session; | |
2545 | ||
2546 | if (session->consumer->type == CONSUMER_DST_NET || | |
2547 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2548 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2549 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2550 | sizeof(sessions[i].path), session); |
2f77fc4b | 2551 | } else { |
dec56f6c | 2552 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2553 | session->consumer->dst.trace_path); |
2554 | } | |
2555 | if (ret < 0) { | |
2556 | PERROR("snprintf session path"); | |
2557 | continue; | |
2558 | } | |
2559 | ||
2560 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2561 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 2562 | sessions[i].enabled = session->active; |
2cbf8fed | 2563 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 2564 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
2565 | i++; |
2566 | } | |
2567 | } | |
2568 | ||
806e2684 | 2569 | /* |
6d805429 | 2570 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2571 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2572 | */ |
6d805429 | 2573 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2574 | { |
2575 | int ret; | |
2576 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2577 | struct ltt_ust_session *usess = session->ust_session; | |
2578 | ||
2579 | assert(session); | |
2580 | ||
2581 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 2582 | if (session->active) { |
806e2684 DG |
2583 | ret = LTTNG_ERR_SESSION_STARTED; |
2584 | goto error; | |
3a89d11a DG |
2585 | } else { |
2586 | /* | |
2587 | * If stopped, just make sure we've started before else the above call | |
2588 | * will always send that there is data pending. | |
2589 | * | |
2590 | * The consumer assumes that when the data pending command is received, | |
2591 | * the trace has been started before or else no output data is written | |
2592 | * by the streams which is a condition for data pending. So, this is | |
2593 | * *VERY* important that we don't ask the consumer before a start | |
2594 | * trace. | |
2595 | */ | |
8382cf6f | 2596 | if (!session->has_been_started) { |
3a89d11a DG |
2597 | ret = 0; |
2598 | goto error; | |
2599 | } | |
806e2684 DG |
2600 | } |
2601 | ||
2602 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2603 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2604 | if (ret == 1) { | |
806e2684 DG |
2605 | /* Data is still being extracted for the kernel. */ |
2606 | goto error; | |
2607 | } | |
2608 | } | |
2609 | ||
2610 | if (usess && usess->consumer) { | |
6d805429 DG |
2611 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2612 | if (ret == 1) { | |
806e2684 DG |
2613 | /* Data is still being extracted for the kernel. */ |
2614 | goto error; | |
2615 | } | |
2616 | } | |
2617 | ||
2618 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2619 | ret = 0; |
806e2684 DG |
2620 | |
2621 | error: | |
2622 | return ret; | |
2623 | } | |
2624 | ||
6dc3064a DG |
2625 | /* |
2626 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2627 | * | |
2628 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2629 | */ | |
2630 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2631 | struct lttng_snapshot_output *output, uint32_t *id) | |
2632 | { | |
2633 | int ret; | |
2634 | struct snapshot_output *new_output; | |
2635 | ||
2636 | assert(session); | |
2637 | assert(output); | |
2638 | ||
2639 | DBG("Cmd snapshot add output for session %s", session->name); | |
2640 | ||
2641 | /* | |
d3f14b8a MD |
2642 | * Permission denied to create an output if the session is not |
2643 | * set in no output mode. | |
6dc3064a DG |
2644 | */ |
2645 | if (session->output_traces) { | |
2646 | ret = LTTNG_ERR_EPERM; | |
2647 | goto error; | |
2648 | } | |
2649 | ||
2650 | /* Only one output is allowed until we have the "tee" feature. */ | |
2651 | if (session->snapshot.nb_output == 1) { | |
2652 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2653 | goto error; | |
2654 | } | |
2655 | ||
2656 | new_output = snapshot_output_alloc(); | |
2657 | if (!new_output) { | |
2658 | ret = LTTNG_ERR_NOMEM; | |
2659 | goto error; | |
2660 | } | |
2661 | ||
2662 | ret = snapshot_output_init(output->max_size, output->name, | |
2663 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2664 | &session->snapshot); | |
2665 | if (ret < 0) { | |
2666 | if (ret == -ENOMEM) { | |
2667 | ret = LTTNG_ERR_NOMEM; | |
2668 | } else { | |
2669 | ret = LTTNG_ERR_INVALID; | |
2670 | } | |
2671 | goto free_error; | |
2672 | } | |
2673 | ||
6dc3064a DG |
2674 | rcu_read_lock(); |
2675 | snapshot_add_output(&session->snapshot, new_output); | |
2676 | if (id) { | |
2677 | *id = new_output->id; | |
2678 | } | |
2679 | rcu_read_unlock(); | |
2680 | ||
2681 | return LTTNG_OK; | |
2682 | ||
2683 | free_error: | |
2684 | snapshot_output_destroy(new_output); | |
2685 | error: | |
2686 | return ret; | |
2687 | } | |
2688 | ||
2689 | /* | |
2690 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2691 | * | |
2692 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2693 | */ | |
2694 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2695 | struct lttng_snapshot_output *output) | |
2696 | { | |
2697 | int ret; | |
eb240553 | 2698 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2699 | |
2700 | assert(session); | |
2701 | assert(output); | |
2702 | ||
6dc3064a DG |
2703 | rcu_read_lock(); |
2704 | ||
2705 | /* | |
d3f14b8a MD |
2706 | * Permission denied to create an output if the session is not |
2707 | * set in no output mode. | |
6dc3064a DG |
2708 | */ |
2709 | if (session->output_traces) { | |
2710 | ret = LTTNG_ERR_EPERM; | |
2711 | goto error; | |
2712 | } | |
2713 | ||
eb240553 DG |
2714 | if (output->id) { |
2715 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2716 | session->name); | |
2717 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2718 | } else if (*output->name != '\0') { | |
2719 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2720 | session->name); | |
2721 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2722 | } | |
6dc3064a DG |
2723 | if (!sout) { |
2724 | ret = LTTNG_ERR_INVALID; | |
2725 | goto error; | |
2726 | } | |
2727 | ||
2728 | snapshot_delete_output(&session->snapshot, sout); | |
2729 | snapshot_output_destroy(sout); | |
2730 | ret = LTTNG_OK; | |
2731 | ||
2732 | error: | |
2733 | rcu_read_unlock(); | |
2734 | return ret; | |
2735 | } | |
2736 | ||
2737 | /* | |
2738 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2739 | * | |
2740 | * If no output is available, outputs is untouched and 0 is returned. | |
2741 | * | |
2742 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2743 | */ | |
2744 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2745 | struct lttng_snapshot_output **outputs) | |
2746 | { | |
2747 | int ret, idx = 0; | |
2748 | struct lttng_snapshot_output *list; | |
2749 | struct lttng_ht_iter iter; | |
2750 | struct snapshot_output *output; | |
2751 | ||
2752 | assert(session); | |
2753 | assert(outputs); | |
2754 | ||
2755 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2756 | ||
2757 | /* | |
d3f14b8a MD |
2758 | * Permission denied to create an output if the session is not |
2759 | * set in no output mode. | |
6dc3064a DG |
2760 | */ |
2761 | if (session->output_traces) { | |
2762 | ret = LTTNG_ERR_EPERM; | |
2763 | goto error; | |
2764 | } | |
2765 | ||
2766 | if (session->snapshot.nb_output == 0) { | |
2767 | ret = 0; | |
2768 | goto error; | |
2769 | } | |
2770 | ||
2771 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2772 | if (!list) { | |
2773 | ret = LTTNG_ERR_NOMEM; | |
2774 | goto error; | |
2775 | } | |
2776 | ||
2777 | /* Copy list from session to the new list object. */ | |
2778 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, | |
2779 | output, node.node) { | |
2780 | assert(output->consumer); | |
2781 | list[idx].id = output->id; | |
2782 | list[idx].max_size = output->max_size; | |
2783 | strncpy(list[idx].name, output->name, sizeof(list[idx].name)); | |
2784 | if (output->consumer->type == CONSUMER_DST_LOCAL) { | |
2785 | strncpy(list[idx].ctrl_url, output->consumer->dst.trace_path, | |
2786 | sizeof(list[idx].ctrl_url)); | |
2787 | } else { | |
2788 | /* Control URI. */ | |
2789 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
2790 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
2791 | if (ret < 0) { | |
2792 | ret = LTTNG_ERR_NOMEM; | |
2793 | goto free_error; | |
2794 | } | |
2795 | ||
2796 | /* Data URI. */ | |
2797 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
2798 | list[idx].data_url, sizeof(list[idx].data_url)); | |
2799 | if (ret < 0) { | |
2800 | ret = LTTNG_ERR_NOMEM; | |
2801 | goto free_error; | |
2802 | } | |
2803 | } | |
2804 | idx++; | |
2805 | } | |
2806 | ||
2807 | *outputs = list; | |
2808 | return session->snapshot.nb_output; | |
2809 | ||
2810 | free_error: | |
2811 | free(list); | |
2812 | error: | |
2813 | return -ret; | |
2814 | } | |
2815 | ||
2816 | /* | |
2817 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
2818 | * snapshot output is *not* set with a remote destination. | |
2819 | * | |
a934f4af | 2820 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2821 | */ |
2822 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
2823 | struct snapshot_output *snap_output, struct ltt_session *session) | |
2824 | { | |
a934f4af | 2825 | int ret = LTTNG_OK; |
6dc3064a DG |
2826 | struct lttng_ht_iter iter; |
2827 | struct consumer_socket *socket; | |
2828 | ||
2829 | assert(consumer); | |
2830 | assert(snap_output); | |
2831 | assert(session); | |
2832 | ||
2833 | DBG2("Set relayd object from snapshot output"); | |
2834 | ||
2835 | /* Ignore if snapshot consumer output is not network. */ | |
2836 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
2837 | goto error; | |
2838 | } | |
2839 | ||
2840 | /* | |
2841 | * For each consumer socket, create and send the relayd object of the | |
2842 | * snapshot output. | |
2843 | */ | |
2844 | rcu_read_lock(); | |
5eecee74 DG |
2845 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
2846 | socket, node.node) { | |
6dc3064a | 2847 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
2848 | snap_output->consumer, socket, |
2849 | session->name, session->hostname, | |
2850 | session->live_timer); | |
a934f4af | 2851 | if (ret != LTTNG_OK) { |
6dc3064a DG |
2852 | rcu_read_unlock(); |
2853 | goto error; | |
2854 | } | |
2855 | } | |
2856 | rcu_read_unlock(); | |
2857 | ||
2858 | error: | |
2859 | return ret; | |
2860 | } | |
2861 | ||
2862 | /* | |
2863 | * Record a kernel snapshot. | |
2864 | * | |
fac41e72 | 2865 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
2866 | */ |
2867 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded | 2868 | struct snapshot_output *output, struct ltt_session *session, |
68808f4e | 2869 | int wait, uint64_t max_stream_size) |
6dc3064a DG |
2870 | { |
2871 | int ret; | |
2872 | ||
2873 | assert(ksess); | |
2874 | assert(output); | |
2875 | assert(session); | |
2876 | ||
10a50311 JD |
2877 | /* Get the datetime for the snapshot output directory. */ |
2878 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2879 | sizeof(output->datetime)); | |
2880 | if (!ret) { | |
a934f4af | 2881 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2882 | goto error; |
2883 | } | |
2884 | ||
af706bb7 DG |
2885 | /* |
2886 | * Copy kernel session sockets so we can communicate with the right | |
2887 | * consumer for the snapshot record command. | |
2888 | */ | |
2889 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
2890 | if (ret < 0) { | |
a934f4af | 2891 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2892 | goto error; |
6dc3064a DG |
2893 | } |
2894 | ||
2895 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 2896 | if (ret != LTTNG_OK) { |
af706bb7 | 2897 | goto error_snapshot; |
6dc3064a DG |
2898 | } |
2899 | ||
68808f4e | 2900 | ret = kernel_snapshot_record(ksess, output, wait, max_stream_size); |
2a06df8d | 2901 | if (ret != LTTNG_OK) { |
af706bb7 | 2902 | goto error_snapshot; |
6dc3064a DG |
2903 | } |
2904 | ||
a934f4af DG |
2905 | ret = LTTNG_OK; |
2906 | ||
af706bb7 DG |
2907 | error_snapshot: |
2908 | /* Clean up copied sockets so this output can use some other later on. */ | |
2909 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
2910 | error: |
2911 | return ret; | |
2912 | } | |
2913 | ||
2914 | /* | |
2915 | * Record a UST snapshot. | |
2916 | * | |
a934f4af | 2917 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
2918 | */ |
2919 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 2920 | struct snapshot_output *output, struct ltt_session *session, |
68808f4e | 2921 | int wait, uint64_t max_stream_size) |
6dc3064a DG |
2922 | { |
2923 | int ret; | |
2924 | ||
2925 | assert(usess); | |
2926 | assert(output); | |
2927 | assert(session); | |
2928 | ||
10a50311 JD |
2929 | /* Get the datetime for the snapshot output directory. */ |
2930 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
2931 | sizeof(output->datetime)); | |
2932 | if (!ret) { | |
a934f4af | 2933 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
2934 | goto error; |
2935 | } | |
2936 | ||
af706bb7 | 2937 | /* |
d3f14b8a | 2938 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
2939 | * consumer for the snapshot record command. |
2940 | */ | |
2941 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
2942 | if (ret < 0) { | |
a934f4af | 2943 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 2944 | goto error; |
6dc3064a DG |
2945 | } |
2946 | ||
2947 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 2948 | if (ret != LTTNG_OK) { |
af706bb7 | 2949 | goto error_snapshot; |
6dc3064a DG |
2950 | } |
2951 | ||
68808f4e | 2952 | ret = ust_app_snapshot_record(usess, output, wait, max_stream_size); |
6dc3064a | 2953 | if (ret < 0) { |
7badf927 DG |
2954 | switch (-ret) { |
2955 | case EINVAL: | |
a934f4af | 2956 | ret = LTTNG_ERR_INVALID; |
7badf927 DG |
2957 | break; |
2958 | case ENODATA: | |
2959 | ret = LTTNG_ERR_SNAPSHOT_NODATA; | |
2960 | break; | |
2961 | default: | |
2962 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
2963 | break; | |
5c786ded | 2964 | } |
af706bb7 | 2965 | goto error_snapshot; |
6dc3064a DG |
2966 | } |
2967 | ||
a934f4af DG |
2968 | ret = LTTNG_OK; |
2969 | ||
af706bb7 DG |
2970 | error_snapshot: |
2971 | /* Clean up copied sockets so this output can use some other later on. */ | |
2972 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
2973 | error: |
2974 | return ret; | |
2975 | } | |
2976 | ||
68808f4e DG |
2977 | /* |
2978 | * Return the biggest subbuffer size of all channels in the given session. | |
2979 | */ | |
2980 | static uint64_t get_session_max_subbuf_size(struct ltt_session *session) | |
2981 | { | |
2982 | uint64_t max_size = 0; | |
2983 | ||
2984 | assert(session); | |
2985 | ||
2986 | if (session->kernel_session) { | |
2987 | struct ltt_kernel_channel *chan; | |
2988 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2989 | ||
2990 | /* | |
2991 | * For each channel, add to the max size the size of each subbuffer | |
2992 | * multiplied by their sized. | |
2993 | */ | |
2994 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { | |
2995 | if (chan->channel->attr.subbuf_size > max_size) { | |
2996 | max_size = chan->channel->attr.subbuf_size; | |
2997 | } | |
2998 | } | |
2999 | } | |
3000 | ||
3001 | if (session->ust_session) { | |
3002 | struct lttng_ht_iter iter; | |
3003 | struct ltt_ust_channel *uchan; | |
3004 | struct ltt_ust_session *usess = session->ust_session; | |
3005 | ||
3006 | cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, | |
3007 | uchan, node.node) { | |
3008 | if (uchan->attr.subbuf_size > max_size) { | |
3009 | max_size = uchan->attr.subbuf_size; | |
3010 | } | |
3011 | } | |
3012 | } | |
3013 | ||
3014 | return max_size; | |
3015 | } | |
3016 | ||
5c786ded JD |
3017 | /* |
3018 | * Returns the total number of streams for a session or a negative value | |
3019 | * on error. | |
3020 | */ | |
68808f4e | 3021 | static unsigned int get_session_nb_streams(struct ltt_session *session) |
5c786ded JD |
3022 | { |
3023 | unsigned int total_streams = 0; | |
3024 | ||
3025 | if (session->kernel_session) { | |
3026 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3027 | ||
3028 | total_streams += ksess->stream_count_global; | |
3029 | } | |
3030 | ||
3031 | if (session->ust_session) { | |
3032 | struct ltt_ust_session *usess = session->ust_session; | |
3033 | ||
3034 | total_streams += ust_app_get_nb_stream(usess); | |
3035 | } | |
3036 | ||
3037 | return total_streams; | |
3038 | } | |
3039 | ||
6dc3064a DG |
3040 | /* |
3041 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3042 | * | |
3043 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3044 | * complete before returning. | |
3045 | * | |
3046 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3047 | */ | |
3048 | int cmd_snapshot_record(struct ltt_session *session, | |
3049 | struct lttng_snapshot_output *output, int wait) | |
3050 | { | |
3051 | int ret = LTTNG_OK; | |
e1986656 DG |
3052 | unsigned int use_tmp_output = 0; |
3053 | struct snapshot_output tmp_output; | |
1bfe7328 | 3054 | unsigned int nb_streams, snapshot_success = 0; |
68808f4e | 3055 | uint64_t session_max_size = 0, max_stream_size = 0; |
6dc3064a DG |
3056 | |
3057 | assert(session); | |
3058 | ||
3059 | DBG("Cmd snapshot record for session %s", session->name); | |
3060 | ||
3061 | /* | |
d3f14b8a MD |
3062 | * Permission denied to create an output if the session is not |
3063 | * set in no output mode. | |
6dc3064a DG |
3064 | */ |
3065 | if (session->output_traces) { | |
3066 | ret = LTTNG_ERR_EPERM; | |
3067 | goto error; | |
3068 | } | |
3069 | ||
3070 | /* The session needs to be started at least once. */ | |
8382cf6f | 3071 | if (!session->has_been_started) { |
6dc3064a DG |
3072 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3073 | goto error; | |
3074 | } | |
3075 | ||
3076 | /* Use temporary output for the session. */ | |
3077 | if (output && *output->ctrl_url != '\0') { | |
6dc3064a DG |
3078 | ret = snapshot_output_init(output->max_size, output->name, |
3079 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3080 | &tmp_output, NULL); |
6dc3064a DG |
3081 | if (ret < 0) { |
3082 | if (ret == -ENOMEM) { | |
3083 | ret = LTTNG_ERR_NOMEM; | |
3084 | } else { | |
3085 | ret = LTTNG_ERR_INVALID; | |
3086 | } | |
3087 | goto error; | |
3088 | } | |
1bfe7328 DG |
3089 | /* Use the global session count for the temporary snapshot. */ |
3090 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
e1986656 | 3091 | use_tmp_output = 1; |
6dc3064a DG |
3092 | } |
3093 | ||
5c786ded | 3094 | /* |
68808f4e DG |
3095 | * Get the session maximum size for a snapshot meaning it will compute the |
3096 | * size of all streams from all domain. | |
3097 | */ | |
3098 | max_stream_size = get_session_max_subbuf_size(session); | |
3099 | ||
3100 | nb_streams = get_session_nb_streams(session); | |
3101 | if (nb_streams) { | |
3102 | /* | |
3103 | * The maximum size of the snapshot is the number of streams multiplied | |
3104 | * by the biggest subbuf size of all channels in a session which is the | |
3105 | * maximum stream size available for each stream. The session max size | |
3106 | * is now checked against the snapshot max size value given by the user | |
3107 | * and if lower, an error is returned. | |
3108 | */ | |
3109 | session_max_size = max_stream_size * nb_streams; | |
3110 | } | |
3111 | ||
3112 | DBG3("Snapshot max size is %" PRIu64 " for max stream size of %" PRIu64, | |
3113 | session_max_size, max_stream_size); | |
3114 | ||
3115 | /* | |
3116 | * If we use a temporary output, check right away if the max size fits else | |
3117 | * for each output the max size will be checked. | |
5c786ded | 3118 | */ |
68808f4e DG |
3119 | if (use_tmp_output && |
3120 | (tmp_output.max_size != 0 && | |
3121 | tmp_output.max_size < session_max_size)) { | |
3122 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3123 | goto error; | |
3124 | } | |
5c786ded | 3125 | |
6dc3064a DG |
3126 | if (session->kernel_session) { |
3127 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3128 | ||
e1986656 DG |
3129 | if (use_tmp_output) { |
3130 | ret = record_kernel_snapshot(ksess, &tmp_output, session, | |
68808f4e | 3131 | wait, max_stream_size); |
a934f4af | 3132 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3133 | goto error; |
3134 | } | |
1bfe7328 | 3135 | snapshot_success = 1; |
6dc3064a DG |
3136 | } else { |
3137 | struct snapshot_output *sout; | |
3138 | struct lttng_ht_iter iter; | |
3139 | ||
3140 | rcu_read_lock(); | |
3141 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3142 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3143 | /* |
3144 | * Make a local copy of the output and assign the possible | |
3145 | * temporary value given by the caller. | |
3146 | */ | |
3147 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3148 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3149 | ||
3150 | /* Use temporary max size. */ | |
3151 | if (output->max_size != (uint64_t) -1ULL) { | |
3152 | tmp_output.max_size = output->max_size; | |
3153 | } | |
3154 | ||
68808f4e DG |
3155 | if (tmp_output.max_size != 0 && |
3156 | tmp_output.max_size < session_max_size) { | |
3157 | rcu_read_unlock(); | |
3158 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3159 | goto error; | |
3160 | } | |
3161 | ||
e1986656 DG |
3162 | /* Use temporary name. */ |
3163 | if (*output->name != '\0') { | |
3164 | strncpy(tmp_output.name, output->name, | |
3165 | sizeof(tmp_output.name)); | |
3166 | } | |
3167 | ||
1bfe7328 DG |
3168 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3169 | ||
e1986656 | 3170 | ret = record_kernel_snapshot(ksess, &tmp_output, |
68808f4e | 3171 | session, wait, max_stream_size); |
a934f4af | 3172 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3173 | rcu_read_unlock(); |
3174 | goto error; | |
3175 | } | |
1bfe7328 | 3176 | snapshot_success = 1; |
6dc3064a DG |
3177 | } |
3178 | rcu_read_unlock(); | |
3179 | } | |
3180 | } | |
3181 | ||
3182 | if (session->ust_session) { | |
3183 | struct ltt_ust_session *usess = session->ust_session; | |
3184 | ||
e1986656 DG |
3185 | if (use_tmp_output) { |
3186 | ret = record_ust_snapshot(usess, &tmp_output, session, | |
68808f4e | 3187 | wait, max_stream_size); |
a934f4af | 3188 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3189 | goto error; |
3190 | } | |
1bfe7328 | 3191 | snapshot_success = 1; |
6dc3064a DG |
3192 | } else { |
3193 | struct snapshot_output *sout; | |
3194 | struct lttng_ht_iter iter; | |
3195 | ||
3196 | rcu_read_lock(); | |
3197 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3198 | &iter.iter, sout, node.node) { | |
e1986656 DG |
3199 | /* |
3200 | * Make a local copy of the output and assign the possible | |
3201 | * temporary value given by the caller. | |
3202 | */ | |
3203 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3204 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3205 | ||
e1986656 DG |
3206 | /* Use temporary max size. */ |
3207 | if (output->max_size != (uint64_t) -1ULL) { | |
3208 | tmp_output.max_size = output->max_size; | |
3209 | } | |
3210 | ||
68808f4e DG |
3211 | if (tmp_output.max_size != 0 && |
3212 | tmp_output.max_size < session_max_size) { | |
3213 | rcu_read_unlock(); | |
3214 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3215 | goto error; | |
3216 | } | |
3217 | ||
e1986656 DG |
3218 | /* Use temporary name. */ |
3219 | if (*output->name != '\0') { | |
3220 | strncpy(tmp_output.name, output->name, | |
3221 | sizeof(tmp_output.name)); | |
3222 | } | |
3223 | ||
1bfe7328 DG |
3224 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3225 | ||
e1986656 | 3226 | ret = record_ust_snapshot(usess, &tmp_output, session, |
68808f4e | 3227 | wait, max_stream_size); |
a934f4af | 3228 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3229 | rcu_read_unlock(); |
3230 | goto error; | |
3231 | } | |
1bfe7328 | 3232 | snapshot_success = 1; |
6dc3064a DG |
3233 | } |
3234 | rcu_read_unlock(); | |
3235 | } | |
3236 | } | |
3237 | ||
1bfe7328 DG |
3238 | if (snapshot_success) { |
3239 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3240 | } else { |
3241 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3242 | } |
3243 | ||
6dc3064a | 3244 | error: |
6dc3064a DG |
3245 | return ret; |
3246 | } | |
3247 | ||
2f77fc4b DG |
3248 | /* |
3249 | * Init command subsystem. | |
3250 | */ | |
3251 | void cmd_init(void) | |
3252 | { | |
3253 | /* | |
d88aee68 DG |
3254 | * Set network sequence index to 1 for streams to match a relayd |
3255 | * socket on the consumer side. | |
2f77fc4b | 3256 | */ |
d88aee68 DG |
3257 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3258 | relayd_net_seq_idx = 1; | |
3259 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3260 | |
3261 | DBG("Command subsystem initialized"); | |
3262 | } |