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 | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
2f77fc4b | 20 | #include <assert.h> |
1f345e94 | 21 | #include <string.h> |
6dc3064a | 22 | #include <inttypes.h> |
2f77fc4b DG |
23 | #include <urcu/list.h> |
24 | #include <urcu/uatomic.h> | |
25 | ||
26 | #include <common/defaults.h> | |
27 | #include <common/common.h> | |
28 | #include <common/sessiond-comm/sessiond-comm.h> | |
29 | #include <common/relayd/relayd.h> | |
10a50311 | 30 | #include <common/utils.h> |
2f77fc4b DG |
31 | |
32 | #include "channel.h" | |
33 | #include "consumer.h" | |
34 | #include "event.h" | |
8782cc74 | 35 | #include "health-sessiond.h" |
2f77fc4b DG |
36 | #include "kernel.h" |
37 | #include "kernel-consumer.h" | |
38 | #include "lttng-sessiond.h" | |
39 | #include "utils.h" | |
834978fd | 40 | #include "syscall.h" |
2f77fc4b DG |
41 | |
42 | #include "cmd.h" | |
43 | ||
44 | /* | |
45 | * Used to keep a unique index for each relayd socket created where this value | |
46 | * is associated with streams on the consumer so it can match the right relayd | |
d88aee68 DG |
47 | * to send to. It must be accessed with the relayd_net_seq_idx_lock |
48 | * held. | |
2f77fc4b | 49 | */ |
d88aee68 DG |
50 | static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER; |
51 | static uint64_t relayd_net_seq_idx; | |
2f77fc4b DG |
52 | |
53 | /* | |
54 | * Create a session path used by list_lttng_sessions for the case that the | |
55 | * session consumer is on the network. | |
56 | */ | |
57 | static int build_network_session_path(char *dst, size_t size, | |
58 | struct ltt_session *session) | |
59 | { | |
60 | int ret, kdata_port, udata_port; | |
61 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
62 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
63 | ||
64 | assert(session); | |
65 | assert(dst); | |
66 | ||
67 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
68 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
69 | ||
70 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
71 | ||
72 | if (session->kernel_session && session->kernel_session->consumer) { | |
73 | kuri = &session->kernel_session->consumer->dst.net.control; | |
74 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
75 | } | |
76 | ||
77 | if (session->ust_session && session->ust_session->consumer) { | |
78 | uuri = &session->ust_session->consumer->dst.net.control; | |
79 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
80 | } | |
81 | ||
82 | if (uuri == NULL && kuri == NULL) { | |
83 | uri = &session->consumer->dst.net.control; | |
84 | kdata_port = session->consumer->dst.net.data.port; | |
85 | } else if (kuri && uuri) { | |
86 | ret = uri_compare(kuri, uuri); | |
87 | if (ret) { | |
88 | /* Not Equal */ | |
89 | uri = kuri; | |
90 | /* Build uuri URL string */ | |
91 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
92 | if (ret < 0) { | |
93 | goto error; | |
94 | } | |
95 | } else { | |
96 | uri = kuri; | |
97 | } | |
98 | } else if (kuri && uuri == NULL) { | |
99 | uri = kuri; | |
100 | } else if (uuri && kuri == NULL) { | |
101 | uri = uuri; | |
102 | } | |
103 | ||
104 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
105 | if (ret < 0) { | |
106 | goto error; | |
107 | } | |
108 | ||
9aa9f900 DG |
109 | /* |
110 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
111 | * to print. | |
112 | */ | |
9d035200 | 113 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
114 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
115 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
116 | } else { | |
9aa9f900 | 117 | int dport; |
bef08707 | 118 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
119 | dport = kdata_port; |
120 | } else { | |
121 | /* No kernel URI, use the UST port. */ | |
122 | dport = udata_port; | |
123 | } | |
124 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
125 | } |
126 | ||
127 | error: | |
128 | return ret; | |
129 | } | |
130 | ||
131 | /* | |
132 | * Fill lttng_channel array of all channels. | |
133 | */ | |
134 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
135 | struct lttng_channel *channels) | |
136 | { | |
137 | int i = 0; | |
138 | struct ltt_kernel_channel *kchan; | |
139 | ||
140 | DBG("Listing channels for session %s", session->name); | |
141 | ||
142 | switch (domain) { | |
143 | case LTTNG_DOMAIN_KERNEL: | |
144 | /* Kernel channels */ | |
145 | if (session->kernel_session != NULL) { | |
146 | cds_list_for_each_entry(kchan, | |
147 | &session->kernel_session->channel_list.head, list) { | |
148 | /* Copy lttng_channel struct to array */ | |
149 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
150 | channels[i].enabled = kchan->enabled; | |
151 | i++; | |
152 | } | |
153 | } | |
154 | break; | |
155 | case LTTNG_DOMAIN_UST: | |
156 | { | |
157 | struct lttng_ht_iter iter; | |
158 | struct ltt_ust_channel *uchan; | |
159 | ||
e7fe706f | 160 | rcu_read_lock(); |
2f77fc4b DG |
161 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
162 | &iter.iter, uchan, node.node) { | |
163 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
164 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
165 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
166 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
167 | channels[i].attr.switch_timer_interval = | |
168 | uchan->attr.switch_timer_interval; | |
169 | channels[i].attr.read_timer_interval = | |
170 | uchan->attr.read_timer_interval; | |
171 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
172 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
173 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
2f77fc4b DG |
174 | switch (uchan->attr.output) { |
175 | case LTTNG_UST_MMAP: | |
176 | default: | |
177 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
178 | break; | |
179 | } | |
180 | i++; | |
181 | } | |
e7fe706f | 182 | rcu_read_unlock(); |
2f77fc4b DG |
183 | break; |
184 | } | |
185 | default: | |
186 | break; | |
187 | } | |
188 | } | |
189 | ||
3c6a091f | 190 | /* |
022d91ba | 191 | * Create a list of agent domain events. |
3c6a091f DG |
192 | * |
193 | * Return number of events in list on success or else a negative value. | |
194 | */ | |
022d91ba | 195 | static int list_lttng_agent_events(struct agent *agt, |
3c6a091f DG |
196 | struct lttng_event **events) |
197 | { | |
198 | int i = 0, ret = 0; | |
199 | unsigned int nb_event = 0; | |
022d91ba | 200 | struct agent_event *event; |
3c6a091f DG |
201 | struct lttng_event *tmp_events; |
202 | struct lttng_ht_iter iter; | |
203 | ||
022d91ba | 204 | assert(agt); |
3c6a091f DG |
205 | assert(events); |
206 | ||
022d91ba | 207 | DBG3("Listing agent events"); |
3c6a091f | 208 | |
e5bbf678 | 209 | rcu_read_lock(); |
022d91ba | 210 | nb_event = lttng_ht_get_count(agt->events); |
e5bbf678 | 211 | rcu_read_unlock(); |
3c6a091f DG |
212 | if (nb_event == 0) { |
213 | ret = nb_event; | |
214 | goto error; | |
215 | } | |
216 | ||
217 | tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); | |
218 | if (!tmp_events) { | |
022d91ba | 219 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
220 | ret = -LTTNG_ERR_FATAL; |
221 | goto error; | |
222 | } | |
223 | ||
224 | rcu_read_lock(); | |
022d91ba | 225 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
226 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
227 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
228 | tmp_events[i].enabled = event->enabled; | |
ff94328f DG |
229 | tmp_events[i].loglevel = event->loglevel; |
230 | tmp_events[i].loglevel_type = event->loglevel_type; | |
3c6a091f DG |
231 | i++; |
232 | } | |
233 | rcu_read_unlock(); | |
234 | ||
235 | *events = tmp_events; | |
236 | ret = nb_event; | |
237 | ||
238 | error: | |
239 | assert(nb_event == i); | |
240 | return ret; | |
241 | } | |
242 | ||
2f77fc4b DG |
243 | /* |
244 | * Create a list of ust global domain events. | |
245 | */ | |
246 | static int list_lttng_ust_global_events(char *channel_name, | |
247 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
248 | { | |
249 | int i = 0, ret = 0; | |
250 | unsigned int nb_event = 0; | |
251 | struct lttng_ht_iter iter; | |
252 | struct lttng_ht_node_str *node; | |
253 | struct ltt_ust_channel *uchan; | |
254 | struct ltt_ust_event *uevent; | |
255 | struct lttng_event *tmp; | |
256 | ||
257 | DBG("Listing UST global events for channel %s", channel_name); | |
258 | ||
259 | rcu_read_lock(); | |
260 | ||
261 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
262 | node = lttng_ht_iter_get_node_str(&iter); | |
263 | if (node == NULL) { | |
f73fabfd | 264 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
265 | goto error; |
266 | } | |
267 | ||
268 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
269 | ||
8040687e | 270 | nb_event = lttng_ht_get_count(uchan->events); |
2f77fc4b DG |
271 | if (nb_event == 0) { |
272 | ret = nb_event; | |
273 | goto error; | |
274 | } | |
275 | ||
276 | DBG3("Listing UST global %d events", nb_event); | |
277 | ||
278 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
279 | if (tmp == NULL) { | |
f73fabfd | 280 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
281 | goto error; |
282 | } | |
283 | ||
284 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
8040687e JG |
285 | if (uevent->internal) { |
286 | /* This event should remain hidden from clients */ | |
287 | nb_event--; | |
288 | continue; | |
289 | } | |
2f77fc4b DG |
290 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
291 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
292 | tmp[i].enabled = uevent->enabled; | |
293 | ||
294 | switch (uevent->attr.instrumentation) { | |
295 | case LTTNG_UST_TRACEPOINT: | |
296 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
297 | break; | |
298 | case LTTNG_UST_PROBE: | |
299 | tmp[i].type = LTTNG_EVENT_PROBE; | |
300 | break; | |
301 | case LTTNG_UST_FUNCTION: | |
302 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
303 | break; | |
304 | } | |
305 | ||
306 | tmp[i].loglevel = uevent->attr.loglevel; | |
307 | switch (uevent->attr.loglevel_type) { | |
308 | case LTTNG_UST_LOGLEVEL_ALL: | |
309 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
310 | break; | |
311 | case LTTNG_UST_LOGLEVEL_RANGE: | |
312 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
313 | break; | |
314 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
315 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
316 | break; | |
317 | } | |
318 | if (uevent->filter) { | |
319 | tmp[i].filter = 1; | |
320 | } | |
4634f12e JI |
321 | if (uevent->exclusion) { |
322 | tmp[i].exclusion = 1; | |
323 | } | |
2f77fc4b DG |
324 | i++; |
325 | } | |
326 | ||
327 | ret = nb_event; | |
328 | *events = tmp; | |
329 | ||
330 | error: | |
331 | rcu_read_unlock(); | |
332 | return ret; | |
333 | } | |
334 | ||
335 | /* | |
336 | * Fill lttng_event array of all kernel events in the channel. | |
337 | */ | |
338 | static int list_lttng_kernel_events(char *channel_name, | |
339 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
340 | { | |
341 | int i = 0, ret; | |
342 | unsigned int nb_event; | |
343 | struct ltt_kernel_event *event; | |
344 | struct ltt_kernel_channel *kchan; | |
345 | ||
346 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
347 | if (kchan == NULL) { | |
f73fabfd | 348 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
349 | goto error; |
350 | } | |
351 | ||
352 | nb_event = kchan->event_count; | |
353 | ||
354 | DBG("Listing events for channel %s", kchan->channel->name); | |
355 | ||
356 | if (nb_event == 0) { | |
834978fd DG |
357 | *events = NULL; |
358 | goto syscall; | |
2f77fc4b DG |
359 | } |
360 | ||
361 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
362 | if (*events == NULL) { | |
f73fabfd | 363 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
364 | goto error; |
365 | } | |
366 | ||
367 | /* Kernel channels */ | |
368 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
369 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
370 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
371 | (*events)[i].enabled = event->enabled; | |
372 | ||
373 | switch (event->event->instrumentation) { | |
374 | case LTTNG_KERNEL_TRACEPOINT: | |
375 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
376 | break; | |
2f77fc4b | 377 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
378 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
379 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
380 | sizeof(struct lttng_kernel_kprobe)); | |
381 | break; | |
382 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
383 | (*events)[i].type = LTTNG_EVENT_PROBE; |
384 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
385 | sizeof(struct lttng_kernel_kprobe)); | |
386 | break; | |
387 | case LTTNG_KERNEL_FUNCTION: | |
388 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
389 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
390 | sizeof(struct lttng_kernel_function)); | |
391 | break; | |
392 | case LTTNG_KERNEL_NOOP: | |
393 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
394 | break; | |
395 | case LTTNG_KERNEL_SYSCALL: | |
396 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
397 | break; | |
398 | case LTTNG_KERNEL_ALL: | |
399 | assert(0); | |
400 | break; | |
401 | } | |
402 | i++; | |
403 | } | |
404 | ||
834978fd DG |
405 | syscall: |
406 | if (syscall_table) { | |
407 | ssize_t new_size; | |
408 | ||
409 | new_size = syscall_list_channel(kchan, events, nb_event); | |
410 | if (new_size < 0) { | |
411 | free(events); | |
412 | ret = -new_size; | |
413 | goto error; | |
414 | } | |
415 | nb_event = new_size; | |
416 | } | |
417 | ||
2f77fc4b DG |
418 | return nb_event; |
419 | ||
420 | error: | |
f73fabfd DG |
421 | /* Negate the error code to differentiate the size from an error */ |
422 | return -ret; | |
2f77fc4b DG |
423 | } |
424 | ||
425 | /* | |
426 | * Add URI so the consumer output object. Set the correct path depending on the | |
427 | * domain adding the default trace directory. | |
428 | */ | |
429 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
430 | struct lttng_uri *uri, int domain, const char *session_name) | |
431 | { | |
f73fabfd | 432 | int ret = LTTNG_OK; |
2f77fc4b DG |
433 | const char *default_trace_dir; |
434 | ||
435 | assert(uri); | |
436 | ||
437 | if (consumer == NULL) { | |
438 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 439 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
440 | goto error; |
441 | } | |
442 | ||
443 | switch (domain) { | |
444 | case LTTNG_DOMAIN_KERNEL: | |
445 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
446 | break; | |
447 | case LTTNG_DOMAIN_UST: | |
448 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
449 | break; | |
450 | default: | |
451 | /* | |
452 | * This case is possible is we try to add the URI to the global tracing | |
453 | * session consumer object which in this case there is no subdir. | |
454 | */ | |
455 | default_trace_dir = ""; | |
456 | } | |
457 | ||
458 | switch (uri->dtype) { | |
459 | case LTTNG_DST_IPV4: | |
460 | case LTTNG_DST_IPV6: | |
461 | DBG2("Setting network URI to consumer"); | |
462 | ||
df75acac DG |
463 | if (consumer->type == CONSUMER_DST_NET) { |
464 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
465 | consumer->dst.net.control_isset) || |
466 | (uri->stype == LTTNG_STREAM_DATA && | |
467 | consumer->dst.net.data_isset)) { | |
df75acac DG |
468 | ret = LTTNG_ERR_URL_EXIST; |
469 | goto error; | |
470 | } | |
471 | } else { | |
472 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
473 | } |
474 | ||
df75acac DG |
475 | consumer->type = CONSUMER_DST_NET; |
476 | ||
2f77fc4b DG |
477 | /* Set URI into consumer output object */ |
478 | ret = consumer_set_network_uri(consumer, uri); | |
479 | if (ret < 0) { | |
a74934ba | 480 | ret = -ret; |
2f77fc4b DG |
481 | goto error; |
482 | } else if (ret == 1) { | |
483 | /* | |
484 | * URI was the same in the consumer so we do not append the subdir | |
485 | * again so to not duplicate output dir. | |
486 | */ | |
f86c9f4e | 487 | ret = LTTNG_OK; |
2f77fc4b DG |
488 | goto error; |
489 | } | |
490 | ||
491 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
492 | ret = consumer_set_subdir(consumer, session_name); | |
493 | if (ret < 0) { | |
f73fabfd | 494 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
495 | goto error; |
496 | } | |
497 | } | |
498 | ||
499 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
500 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
501 | strncat(consumer->subdir, default_trace_dir, |
502 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
503 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
504 | } | |
505 | ||
506 | break; | |
507 | case LTTNG_DST_PATH: | |
508 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
509 | memset(consumer->dst.trace_path, 0, | |
510 | sizeof(consumer->dst.trace_path)); | |
511 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
512 | sizeof(consumer->dst.trace_path)); | |
513 | /* Append default trace dir */ | |
514 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
515 | sizeof(consumer->dst.trace_path) - |
516 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
517 | /* Flag consumer as local. */ |
518 | consumer->type = CONSUMER_DST_LOCAL; | |
519 | break; | |
520 | } | |
521 | ||
a74934ba DG |
522 | ret = LTTNG_OK; |
523 | ||
2f77fc4b DG |
524 | error: |
525 | return ret; | |
526 | } | |
527 | ||
528 | /* | |
529 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
530 | */ | |
531 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
532 | { | |
533 | int ret = 0; | |
534 | struct lttng_ht_iter iter; | |
535 | struct consumer_socket *socket; | |
536 | ||
537 | assert(session); | |
538 | ||
e7fe706f DG |
539 | rcu_read_lock(); |
540 | ||
2f77fc4b DG |
541 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
542 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
543 | socket, node.node) { | |
2f77fc4b | 544 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 545 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
546 | pthread_mutex_unlock(socket->lock); |
547 | if (ret < 0) { | |
f73fabfd | 548 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
549 | goto error; |
550 | } | |
551 | } | |
552 | } | |
553 | ||
554 | error: | |
e7fe706f | 555 | rcu_read_unlock(); |
2f77fc4b DG |
556 | return ret; |
557 | } | |
558 | ||
559 | /* | |
560 | * Create a socket to the relayd using the URI. | |
561 | * | |
562 | * On success, the relayd_sock pointer is set to the created socket. | |
563 | * Else, it's stays untouched and a lttcomm error code is returned. | |
564 | */ | |
6151a90f JD |
565 | static int create_connect_relayd(struct lttng_uri *uri, |
566 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
567 | { |
568 | int ret; | |
6151a90f | 569 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 570 | |
6151a90f JD |
571 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
572 | RELAYD_VERSION_COMM_MINOR); | |
573 | if (!rsock) { | |
f73fabfd | 574 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
575 | goto error; |
576 | } | |
577 | ||
ffe60014 DG |
578 | /* |
579 | * Connect to relayd so we can proceed with a session creation. This call | |
580 | * can possibly block for an arbitrary amount of time to set the health | |
581 | * state to be in poll execution. | |
582 | */ | |
583 | health_poll_entry(); | |
6151a90f | 584 | ret = relayd_connect(rsock); |
ffe60014 | 585 | health_poll_exit(); |
2f77fc4b DG |
586 | if (ret < 0) { |
587 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 588 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
589 | goto free_sock; |
590 | } | |
591 | ||
592 | /* Create socket for control stream. */ | |
593 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
594 | DBG3("Creating relayd stream socket from URI"); | |
595 | ||
596 | /* Check relayd version */ | |
6151a90f | 597 | ret = relayd_version_check(rsock); |
2f77fc4b | 598 | if (ret < 0) { |
f73fabfd | 599 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
600 | goto close_sock; |
601 | } | |
602 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
603 | DBG3("Creating relayd data socket from URI"); | |
604 | } else { | |
605 | /* Command is not valid */ | |
606 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 607 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
608 | goto close_sock; |
609 | } | |
610 | ||
6151a90f | 611 | *relayd_sock = rsock; |
2f77fc4b | 612 | |
f73fabfd | 613 | return LTTNG_OK; |
2f77fc4b DG |
614 | |
615 | close_sock: | |
6151a90f JD |
616 | /* The returned value is not useful since we are on an error path. */ |
617 | (void) relayd_close(rsock); | |
2f77fc4b | 618 | free_sock: |
6151a90f | 619 | free(rsock); |
2f77fc4b DG |
620 | error: |
621 | return ret; | |
622 | } | |
623 | ||
624 | /* | |
625 | * Connect to the relayd using URI and send the socket to the right consumer. | |
626 | */ | |
6dc3064a | 627 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 628 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
629 | struct consumer_socket *consumer_sock, |
630 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
631 | { |
632 | int ret; | |
6151a90f | 633 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 634 | |
ffe60014 | 635 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 636 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 637 | if (ret != LTTNG_OK) { |
6151a90f | 638 | goto error; |
ffe60014 | 639 | } |
6151a90f | 640 | assert(rsock); |
ffe60014 | 641 | |
2f77fc4b | 642 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
643 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
644 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
645 | /* |
646 | * Increment net_seq_idx because we are about to transfer the | |
647 | * new relayd socket to the consumer. | |
d88aee68 | 648 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 649 | */ |
d88aee68 DG |
650 | consumer->net_seq_index = ++relayd_net_seq_idx; |
651 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
652 | } |
653 | ||
2f77fc4b | 654 | /* Send relayd socket to consumer. */ |
6151a90f | 655 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
656 | relayd_uri->stype, session_id, |
657 | session_name, hostname, session_live_timer); | |
2f77fc4b | 658 | if (ret < 0) { |
f73fabfd | 659 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
660 | goto close_sock; |
661 | } | |
662 | ||
c890b720 DG |
663 | /* Flag that the corresponding socket was sent. */ |
664 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 665 | consumer_sock->control_sock_sent = 1; |
c890b720 | 666 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 667 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
668 | } |
669 | ||
f73fabfd | 670 | ret = LTTNG_OK; |
2f77fc4b DG |
671 | |
672 | /* | |
673 | * Close socket which was dup on the consumer side. The session daemon does | |
674 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
675 | */ | |
676 | ||
677 | close_sock: | |
6151a90f JD |
678 | (void) relayd_close(rsock); |
679 | free(rsock); | |
2f77fc4b | 680 | |
6151a90f | 681 | error: |
ffe60014 DG |
682 | if (ret != LTTNG_OK) { |
683 | /* | |
d9078d0c DG |
684 | * The consumer output for this session should not be used anymore |
685 | * since the relayd connection failed thus making any tracing or/and | |
686 | * streaming not usable. | |
ffe60014 | 687 | */ |
d9078d0c | 688 | consumer->enabled = 0; |
ffe60014 | 689 | } |
2f77fc4b DG |
690 | return ret; |
691 | } | |
692 | ||
693 | /* | |
694 | * Send both relayd sockets to a specific consumer and domain. This is a | |
695 | * helper function to facilitate sending the information to the consumer for a | |
696 | * session. | |
697 | */ | |
6dc3064a | 698 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
699 | struct consumer_output *consumer, struct consumer_socket *sock, |
700 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 701 | { |
dda67f6c | 702 | int ret = LTTNG_OK; |
2f77fc4b | 703 | |
2f77fc4b | 704 | assert(consumer); |
6dc3064a | 705 | assert(sock); |
2f77fc4b | 706 | |
2f77fc4b | 707 | /* Sending control relayd socket. */ |
ffe60014 | 708 | if (!sock->control_sock_sent) { |
6dc3064a | 709 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
710 | &consumer->dst.net.control, consumer, sock, |
711 | session_name, hostname, session_live_timer); | |
c890b720 DG |
712 | if (ret != LTTNG_OK) { |
713 | goto error; | |
714 | } | |
2f77fc4b DG |
715 | } |
716 | ||
717 | /* Sending data relayd socket. */ | |
ffe60014 | 718 | if (!sock->data_sock_sent) { |
6dc3064a | 719 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
720 | &consumer->dst.net.data, consumer, sock, |
721 | session_name, hostname, session_live_timer); | |
c890b720 DG |
722 | if (ret != LTTNG_OK) { |
723 | goto error; | |
724 | } | |
2f77fc4b DG |
725 | } |
726 | ||
2f77fc4b DG |
727 | error: |
728 | return ret; | |
729 | } | |
730 | ||
731 | /* | |
732 | * Setup relayd connections for a tracing session. First creates the socket to | |
733 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
734 | * network. | |
735 | */ | |
ffe60014 | 736 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 737 | { |
f73fabfd | 738 | int ret = LTTNG_OK; |
2f77fc4b DG |
739 | struct ltt_ust_session *usess; |
740 | struct ltt_kernel_session *ksess; | |
741 | struct consumer_socket *socket; | |
742 | struct lttng_ht_iter iter; | |
743 | ||
744 | assert(session); | |
745 | ||
746 | usess = session->ust_session; | |
747 | ksess = session->kernel_session; | |
748 | ||
785d2d0d | 749 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 750 | |
e7fe706f DG |
751 | rcu_read_lock(); |
752 | ||
2f77fc4b DG |
753 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
754 | && usess->consumer->enabled) { | |
755 | /* For each consumer socket, send relayd sockets */ | |
756 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
757 | socket, node.node) { | |
2f77fc4b | 758 | pthread_mutex_lock(socket->lock); |
6dc3064a | 759 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
760 | usess->consumer, socket, |
761 | session->name, session->hostname, | |
762 | session->live_timer); | |
2f77fc4b | 763 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 764 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
765 | goto error; |
766 | } | |
6dc3064a DG |
767 | /* Session is now ready for network streaming. */ |
768 | session->net_handle = 1; | |
2f77fc4b DG |
769 | } |
770 | } | |
771 | ||
772 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
773 | && ksess->consumer->enabled) { | |
774 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
775 | socket, node.node) { | |
2f77fc4b | 776 | pthread_mutex_lock(socket->lock); |
6dc3064a | 777 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
778 | ksess->consumer, socket, |
779 | session->name, session->hostname, | |
780 | session->live_timer); | |
2f77fc4b | 781 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 782 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
783 | goto error; |
784 | } | |
6dc3064a DG |
785 | /* Session is now ready for network streaming. */ |
786 | session->net_handle = 1; | |
2f77fc4b DG |
787 | } |
788 | } | |
789 | ||
790 | error: | |
e7fe706f | 791 | rcu_read_unlock(); |
2f77fc4b DG |
792 | return ret; |
793 | } | |
794 | ||
9b6c7ec5 DG |
795 | /* |
796 | * Start a kernel session by opening all necessary streams. | |
797 | */ | |
798 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
799 | { | |
800 | int ret; | |
801 | struct ltt_kernel_channel *kchan; | |
802 | ||
803 | /* Open kernel metadata */ | |
07b86b52 | 804 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
805 | ret = kernel_open_metadata(ksess); |
806 | if (ret < 0) { | |
807 | ret = LTTNG_ERR_KERN_META_FAIL; | |
808 | goto error; | |
809 | } | |
810 | } | |
811 | ||
812 | /* Open kernel metadata stream */ | |
07b86b52 | 813 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
814 | ret = kernel_open_metadata_stream(ksess); |
815 | if (ret < 0) { | |
816 | ERR("Kernel create metadata stream failed"); | |
817 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
818 | goto error; | |
819 | } | |
820 | } | |
821 | ||
822 | /* For each channel */ | |
823 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
824 | if (kchan->stream_count == 0) { | |
825 | ret = kernel_open_channel_stream(kchan); | |
826 | if (ret < 0) { | |
827 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
828 | goto error; | |
829 | } | |
830 | /* Update the stream global counter */ | |
831 | ksess->stream_count_global += ret; | |
832 | } | |
833 | } | |
834 | ||
835 | /* Setup kernel consumer socket and send fds to it */ | |
836 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 837 | if (ret != 0) { |
9b6c7ec5 DG |
838 | ret = LTTNG_ERR_KERN_START_FAIL; |
839 | goto error; | |
840 | } | |
841 | ||
842 | /* This start the kernel tracing */ | |
843 | ret = kernel_start_session(ksess); | |
844 | if (ret < 0) { | |
845 | ret = LTTNG_ERR_KERN_START_FAIL; | |
846 | goto error; | |
847 | } | |
848 | ||
849 | /* Quiescent wait after starting trace */ | |
784303b0 | 850 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 851 | |
14fb1ebe | 852 | ksess->active = 1; |
9b6c7ec5 DG |
853 | |
854 | ret = LTTNG_OK; | |
855 | ||
856 | error: | |
857 | return ret; | |
858 | } | |
859 | ||
2f77fc4b DG |
860 | /* |
861 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
862 | */ | |
863 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
864 | char *channel_name) | |
865 | { | |
866 | int ret; | |
867 | struct ltt_ust_session *usess; | |
868 | ||
869 | usess = session->ust_session; | |
870 | ||
2223c96f DG |
871 | rcu_read_lock(); |
872 | ||
2f77fc4b DG |
873 | switch (domain) { |
874 | case LTTNG_DOMAIN_KERNEL: | |
875 | { | |
876 | ret = channel_kernel_disable(session->kernel_session, | |
877 | channel_name); | |
f73fabfd | 878 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
879 | goto error; |
880 | } | |
881 | ||
882 | kernel_wait_quiescent(kernel_tracer_fd); | |
883 | break; | |
884 | } | |
885 | case LTTNG_DOMAIN_UST: | |
886 | { | |
887 | struct ltt_ust_channel *uchan; | |
888 | struct lttng_ht *chan_ht; | |
889 | ||
890 | chan_ht = usess->domain_global.channels; | |
891 | ||
892 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
893 | if (uchan == NULL) { | |
f73fabfd | 894 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
895 | goto error; |
896 | } | |
897 | ||
7972aab2 | 898 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 899 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
900 | goto error; |
901 | } | |
902 | break; | |
903 | } | |
2f77fc4b | 904 | default: |
f73fabfd | 905 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
906 | goto error; |
907 | } | |
908 | ||
f73fabfd | 909 | ret = LTTNG_OK; |
2f77fc4b DG |
910 | |
911 | error: | |
2223c96f | 912 | rcu_read_unlock(); |
2f77fc4b DG |
913 | return ret; |
914 | } | |
915 | ||
ccf10263 MD |
916 | /* |
917 | * Command LTTNG_TRACK_PID processed by the client thread. | |
a9ad0c8f MD |
918 | * |
919 | * Called with session lock held. | |
ccf10263 MD |
920 | */ |
921 | int cmd_track_pid(struct ltt_session *session, int domain, int pid) | |
922 | { | |
923 | int ret; | |
924 | ||
925 | rcu_read_lock(); | |
926 | ||
927 | switch (domain) { | |
928 | case LTTNG_DOMAIN_KERNEL: | |
929 | { | |
930 | struct ltt_kernel_session *ksess; | |
931 | ||
932 | ksess = session->kernel_session; | |
933 | ||
934 | ret = kernel_track_pid(ksess, pid); | |
935 | if (ret != LTTNG_OK) { | |
936 | goto error; | |
937 | } | |
938 | ||
939 | kernel_wait_quiescent(kernel_tracer_fd); | |
940 | break; | |
941 | } | |
ccf10263 | 942 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
943 | { |
944 | struct ltt_ust_session *usess; | |
945 | ||
946 | usess = session->ust_session; | |
947 | ||
948 | ret = trace_ust_track_pid(usess, pid); | |
949 | if (ret != LTTNG_OK) { | |
950 | goto error; | |
951 | } | |
952 | break; | |
953 | } | |
ccf10263 MD |
954 | default: |
955 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
956 | goto error; | |
957 | } | |
958 | ||
959 | ret = LTTNG_OK; | |
960 | ||
961 | error: | |
962 | rcu_read_unlock(); | |
963 | return ret; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Command LTTNG_UNTRACK_PID processed by the client thread. | |
a9ad0c8f MD |
968 | * |
969 | * Called with session lock held. | |
ccf10263 MD |
970 | */ |
971 | int cmd_untrack_pid(struct ltt_session *session, int domain, int pid) | |
972 | { | |
973 | int ret; | |
974 | ||
975 | rcu_read_lock(); | |
976 | ||
977 | switch (domain) { | |
978 | case LTTNG_DOMAIN_KERNEL: | |
979 | { | |
980 | struct ltt_kernel_session *ksess; | |
981 | ||
982 | ksess = session->kernel_session; | |
983 | ||
984 | ret = kernel_untrack_pid(ksess, pid); | |
985 | if (ret != LTTNG_OK) { | |
986 | goto error; | |
987 | } | |
988 | ||
989 | kernel_wait_quiescent(kernel_tracer_fd); | |
990 | break; | |
991 | } | |
ccf10263 | 992 | case LTTNG_DOMAIN_UST: |
a9ad0c8f MD |
993 | { |
994 | struct ltt_ust_session *usess; | |
995 | ||
996 | usess = session->ust_session; | |
997 | ||
998 | ret = trace_ust_untrack_pid(usess, pid); | |
999 | if (ret != LTTNG_OK) { | |
1000 | goto error; | |
1001 | } | |
1002 | break; | |
1003 | } | |
ccf10263 MD |
1004 | default: |
1005 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
1006 | goto error; | |
1007 | } | |
1008 | ||
1009 | ret = LTTNG_OK; | |
1010 | ||
1011 | error: | |
1012 | rcu_read_unlock(); | |
1013 | return ret; | |
1014 | } | |
1015 | ||
2f77fc4b DG |
1016 | /* |
1017 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
1018 | * | |
1019 | * The wpipe arguments is used as a notifier for the kernel thread. | |
1020 | */ | |
1021 | int cmd_enable_channel(struct ltt_session *session, | |
7972aab2 | 1022 | struct lttng_domain *domain, struct lttng_channel *attr, int wpipe) |
2f77fc4b DG |
1023 | { |
1024 | int ret; | |
1025 | struct ltt_ust_session *usess = session->ust_session; | |
1026 | struct lttng_ht *chan_ht; | |
1f345e94 | 1027 | size_t len; |
2f77fc4b DG |
1028 | |
1029 | assert(session); | |
1030 | assert(attr); | |
7972aab2 | 1031 | assert(domain); |
2f77fc4b | 1032 | |
1f345e94 PP |
1033 | len = strnlen(attr->name, sizeof(attr->name)); |
1034 | ||
1035 | /* Validate channel name */ | |
1036 | if (attr->name[0] == '.' || | |
1037 | memchr(attr->name, '/', len) != NULL) { | |
1038 | ret = LTTNG_ERR_INVALID_CHANNEL_NAME; | |
1039 | goto end; | |
1040 | } | |
1041 | ||
2f77fc4b DG |
1042 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
1043 | ||
03b4fdcf DG |
1044 | rcu_read_lock(); |
1045 | ||
ecc48a90 JD |
1046 | /* |
1047 | * Don't try to enable a channel if the session has been started at | |
1048 | * some point in time before. The tracer does not allow it. | |
1049 | */ | |
8382cf6f | 1050 | if (session->has_been_started) { |
ecc48a90 JD |
1051 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
1052 | goto error; | |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * If the session is a live session, remove the switch timer, the | |
1057 | * live timer does the same thing but sends also synchronisation | |
1058 | * beacons for inactive streams. | |
1059 | */ | |
1060 | if (session->live_timer > 0) { | |
1061 | attr->attr.live_timer_interval = session->live_timer; | |
1062 | attr->attr.switch_timer_interval = 0; | |
1063 | } | |
1064 | ||
33fbd469 DG |
1065 | /* |
1066 | * The ringbuffer (both in user space and kernel) behave badly in overwrite | |
1067 | * mode and with less than 2 subbuf so block it right away and send back an | |
1068 | * invalid attribute error. | |
1069 | */ | |
1070 | if (attr->attr.overwrite && attr->attr.num_subbuf < 2) { | |
1071 | ret = LTTNG_ERR_INVALID; | |
1072 | goto error; | |
1073 | } | |
1074 | ||
7972aab2 | 1075 | switch (domain->type) { |
2f77fc4b DG |
1076 | case LTTNG_DOMAIN_KERNEL: |
1077 | { | |
1078 | struct ltt_kernel_channel *kchan; | |
1079 | ||
2f77fc4b DG |
1080 | kchan = trace_kernel_get_channel_by_name(attr->name, |
1081 | session->kernel_session); | |
1082 | if (kchan == NULL) { | |
1083 | ret = channel_kernel_create(session->kernel_session, attr, wpipe); | |
85076754 MD |
1084 | if (attr->name[0] != '\0') { |
1085 | session->kernel_session->has_non_default_channel = 1; | |
1086 | } | |
2f77fc4b DG |
1087 | } else { |
1088 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
1089 | } | |
1090 | ||
f73fabfd | 1091 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1092 | goto error; |
1093 | } | |
1094 | ||
784303b0 | 1095 | kernel_wait_quiescent(kernel_tracer_fd); |
2f77fc4b DG |
1096 | break; |
1097 | } | |
1098 | case LTTNG_DOMAIN_UST: | |
1099 | { | |
1100 | struct ltt_ust_channel *uchan; | |
1101 | ||
1102 | chan_ht = usess->domain_global.channels; | |
1103 | ||
1104 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); | |
1105 | if (uchan == NULL) { | |
7972aab2 | 1106 | ret = channel_ust_create(usess, attr, domain->buf_type); |
85076754 MD |
1107 | if (attr->name[0] != '\0') { |
1108 | usess->has_non_default_channel = 1; | |
1109 | } | |
2f77fc4b | 1110 | } else { |
7972aab2 | 1111 | ret = channel_ust_enable(usess, uchan); |
2f77fc4b DG |
1112 | } |
1113 | break; | |
1114 | } | |
2f77fc4b | 1115 | default: |
f73fabfd | 1116 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
1117 | goto error; |
1118 | } | |
1119 | ||
1120 | error: | |
2223c96f | 1121 | rcu_read_unlock(); |
1f345e94 | 1122 | end: |
2f77fc4b DG |
1123 | return ret; |
1124 | } | |
1125 | ||
2f77fc4b DG |
1126 | /* |
1127 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1128 | */ | |
1129 | int cmd_disable_event(struct ltt_session *session, int domain, | |
6e911cad MD |
1130 | char *channel_name, |
1131 | struct lttng_event *event) | |
2f77fc4b DG |
1132 | { |
1133 | int ret; | |
6e911cad MD |
1134 | char *event_name; |
1135 | ||
18a720cd MD |
1136 | DBG("Disable event command for event \'%s\'", event->name); |
1137 | ||
6e911cad MD |
1138 | event_name = event->name; |
1139 | ||
9b7431cf JG |
1140 | /* Error out on unhandled search criteria */ |
1141 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad MD |
1142 | || event->pid || event->filter || event->exclusion) { |
1143 | return LTTNG_ERR_UNK; | |
1144 | } | |
2f77fc4b | 1145 | |
2223c96f DG |
1146 | rcu_read_lock(); |
1147 | ||
2f77fc4b DG |
1148 | switch (domain) { |
1149 | case LTTNG_DOMAIN_KERNEL: | |
1150 | { | |
1151 | struct ltt_kernel_channel *kchan; | |
1152 | struct ltt_kernel_session *ksess; | |
1153 | ||
1154 | ksess = session->kernel_session; | |
1155 | ||
85076754 MD |
1156 | /* |
1157 | * If a non-default channel has been created in the | |
1158 | * session, explicitely require that -c chan_name needs | |
1159 | * to be provided. | |
1160 | */ | |
1161 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1162 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1163 | goto error; | |
1164 | } | |
1165 | ||
2f77fc4b DG |
1166 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1167 | if (kchan == NULL) { | |
f73fabfd | 1168 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1169 | goto error; |
1170 | } | |
1171 | ||
6e911cad MD |
1172 | switch (event->type) { |
1173 | case LTTNG_EVENT_ALL: | |
d0ae4ea8 | 1174 | ret = event_kernel_disable_event_all(kchan); |
29c62722 MD |
1175 | if (ret != LTTNG_OK) { |
1176 | goto error; | |
1177 | } | |
1178 | break; | |
d0ae4ea8 MD |
1179 | case LTTNG_EVENT_TRACEPOINT: /* fall-through */ |
1180 | case LTTNG_EVENT_SYSCALL: | |
29c62722 | 1181 | if (!strcmp(event_name, "*")) { |
d0ae4ea8 MD |
1182 | ret = event_kernel_disable_event_type(kchan, |
1183 | event->type); | |
29c62722 | 1184 | } else { |
d0ae4ea8 MD |
1185 | ret = event_kernel_disable_event(kchan, |
1186 | event_name); | |
29c62722 | 1187 | } |
6e911cad MD |
1188 | if (ret != LTTNG_OK) { |
1189 | goto error; | |
1190 | } | |
1191 | break; | |
d0ae4ea8 MD |
1192 | case LTTNG_EVENT_PROBE: |
1193 | case LTTNG_EVENT_FUNCTION: | |
1194 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
1195 | ret = event_kernel_disable_event(kchan, event_name); | |
e2b957af MD |
1196 | if (ret != LTTNG_OK) { |
1197 | goto error; | |
1198 | } | |
6e911cad MD |
1199 | break; |
1200 | default: | |
1201 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1202 | goto error; |
1203 | } | |
1204 | ||
1205 | kernel_wait_quiescent(kernel_tracer_fd); | |
1206 | break; | |
1207 | } | |
1208 | case LTTNG_DOMAIN_UST: | |
1209 | { | |
1210 | struct ltt_ust_channel *uchan; | |
1211 | struct ltt_ust_session *usess; | |
1212 | ||
1213 | usess = session->ust_session; | |
1214 | ||
85076754 MD |
1215 | /* |
1216 | * If a non-default channel has been created in the | |
1217 | * session, explicitely require that -c chan_name needs | |
1218 | * to be provided. | |
1219 | */ | |
1220 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1221 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1222 | goto error; | |
1223 | } | |
1224 | ||
2f77fc4b DG |
1225 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1226 | channel_name); | |
1227 | if (uchan == NULL) { | |
f73fabfd | 1228 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1229 | goto error; |
1230 | } | |
1231 | ||
6e911cad MD |
1232 | switch (event->type) { |
1233 | case LTTNG_EVENT_ALL: | |
1234 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); | |
1235 | if (ret != LTTNG_OK) { | |
1236 | goto error; | |
1237 | } | |
1238 | break; | |
1239 | default: | |
1240 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1241 | goto error; |
1242 | } | |
1243 | ||
1244 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1245 | channel_name); | |
1246 | break; | |
1247 | } | |
5cdb6027 | 1248 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1249 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1250 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1251 | { |
fefd409b | 1252 | struct agent *agt; |
f20baf8e DG |
1253 | struct ltt_ust_session *usess = session->ust_session; |
1254 | ||
1255 | assert(usess); | |
1256 | ||
6e911cad MD |
1257 | switch (event->type) { |
1258 | case LTTNG_EVENT_ALL: | |
1259 | break; | |
1260 | default: | |
1261 | ret = LTTNG_ERR_UNK; | |
1262 | goto error; | |
1263 | } | |
1264 | ||
5cdb6027 | 1265 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1266 | if (!agt) { |
1267 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
1268 | goto error; | |
1269 | } | |
18a720cd MD |
1270 | /* The wild card * means that everything should be disabled. */ |
1271 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
1272 | ret = event_agent_disable_all(usess, agt); | |
1273 | } else { | |
1274 | ret = event_agent_disable(usess, agt, event_name); | |
1275 | } | |
f20baf8e DG |
1276 | if (ret != LTTNG_OK) { |
1277 | goto error; | |
1278 | } | |
1279 | ||
1280 | break; | |
1281 | } | |
2f77fc4b | 1282 | default: |
f73fabfd | 1283 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1284 | goto error; |
1285 | } | |
1286 | ||
f73fabfd | 1287 | ret = LTTNG_OK; |
2f77fc4b DG |
1288 | |
1289 | error: | |
2223c96f | 1290 | rcu_read_unlock(); |
2f77fc4b DG |
1291 | return ret; |
1292 | } | |
1293 | ||
2f77fc4b DG |
1294 | /* |
1295 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1296 | */ | |
1297 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1298 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1299 | { |
d5979e4a | 1300 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1301 | |
1302 | switch (domain) { | |
1303 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1304 | assert(session->kernel_session); |
1305 | ||
1306 | if (session->kernel_session->channel_count == 0) { | |
1307 | /* Create default channel */ | |
1308 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1309 | if (ret != LTTNG_OK) { | |
1310 | goto error; | |
1311 | } | |
d5979e4a | 1312 | chan_kern_created = 1; |
979e618e | 1313 | } |
2f77fc4b | 1314 | /* Add kernel context to kernel tracer */ |
601d5acf | 1315 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1316 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1317 | goto error; |
1318 | } | |
1319 | break; | |
1320 | case LTTNG_DOMAIN_UST: | |
1321 | { | |
1322 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1323 | unsigned int chan_count; |
1324 | ||
2f77fc4b DG |
1325 | assert(usess); |
1326 | ||
85076754 | 1327 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1328 | if (chan_count == 0) { |
1329 | struct lttng_channel *attr; | |
1330 | /* Create default channel */ | |
0a9c6494 | 1331 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1332 | if (attr == NULL) { |
1333 | ret = LTTNG_ERR_FATAL; | |
1334 | goto error; | |
1335 | } | |
1336 | ||
7972aab2 | 1337 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1338 | if (ret != LTTNG_OK) { |
1339 | free(attr); | |
1340 | goto error; | |
1341 | } | |
1342 | free(attr); | |
d5979e4a | 1343 | chan_ust_created = 1; |
979e618e DG |
1344 | } |
1345 | ||
601d5acf | 1346 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1347 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1348 | goto error; |
1349 | } | |
1350 | break; | |
1351 | } | |
2f77fc4b | 1352 | default: |
f73fabfd | 1353 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1354 | goto error; |
1355 | } | |
1356 | ||
d5979e4a | 1357 | return LTTNG_OK; |
2f77fc4b DG |
1358 | |
1359 | error: | |
d5979e4a DG |
1360 | if (chan_kern_created) { |
1361 | struct ltt_kernel_channel *kchan = | |
1362 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1363 | session->kernel_session); | |
1364 | /* Created previously, this should NOT fail. */ | |
1365 | assert(kchan); | |
1366 | kernel_destroy_channel(kchan); | |
1367 | } | |
1368 | ||
1369 | if (chan_ust_created) { | |
1370 | struct ltt_ust_channel *uchan = | |
1371 | trace_ust_find_channel_by_name( | |
1372 | session->ust_session->domain_global.channels, | |
1373 | DEFAULT_CHANNEL_NAME); | |
1374 | /* Created previously, this should NOT fail. */ | |
1375 | assert(uchan); | |
1376 | /* Remove from the channel list of the session. */ | |
1377 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1378 | uchan); | |
1379 | trace_ust_destroy_channel(uchan); | |
1380 | } | |
2f77fc4b DG |
1381 | return ret; |
1382 | } | |
1383 | ||
930a2e99 JG |
1384 | static int validate_event_name(const char *name) |
1385 | { | |
1386 | int ret = 0; | |
1387 | const char *c = name; | |
1388 | const char *event_name_end = c + LTTNG_SYMBOL_NAME_LEN; | |
1389 | ||
1390 | /* | |
1391 | * Make sure that unescaped wildcards are only used as the last | |
1392 | * character of the event name. | |
1393 | */ | |
1394 | while (c < event_name_end) { | |
1395 | switch (*c) { | |
1396 | case '\0': | |
1397 | goto end; | |
1398 | case '\\': | |
1399 | c++; | |
1400 | break; | |
1401 | case '*': | |
1402 | if ((c + 1) < event_name_end && *(c + 1)) { | |
1403 | /* Wildcard is not the last character */ | |
1404 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1405 | goto end; | |
1406 | } | |
1407 | default: | |
1408 | break; | |
1409 | } | |
1410 | c++; | |
1411 | } | |
1412 | end: | |
1413 | return ret; | |
1414 | } | |
1415 | ||
c8100299 JG |
1416 | static inline bool name_starts_with(const char *name, const char *prefix) |
1417 | { | |
1418 | const size_t max_cmp_len = min(strlen(prefix), LTTNG_SYMBOL_NAME_LEN); | |
1419 | ||
1420 | return !strncmp(name, prefix, max_cmp_len); | |
1421 | } | |
1422 | ||
1423 | /* Perform userspace-specific event name validation */ | |
1424 | static int validate_ust_event_name(const char *name) | |
1425 | { | |
1426 | int ret = 0; | |
1427 | ||
1428 | if (!name) { | |
1429 | ret = -1; | |
1430 | goto end; | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | * Check name against all internal UST event component namespaces used | |
1435 | * by the agents. | |
1436 | */ | |
1437 | if (name_starts_with(name, DEFAULT_JUL_EVENT_COMPONENT) || | |
1438 | name_starts_with(name, DEFAULT_LOG4J_EVENT_COMPONENT) || | |
1439 | name_starts_with(name, DEFAULT_PYTHON_EVENT_COMPONENT)) { | |
1440 | ret = -1; | |
1441 | } | |
1442 | ||
1443 | end: | |
1444 | return ret; | |
1445 | } | |
9732459c JG |
1446 | |
1447 | static int cmd_enable_event_internal(struct ltt_session *session, | |
1448 | struct lttng_domain *domain, | |
1449 | char *channel_name, struct lttng_event *event, | |
1450 | char *filter_expression, | |
1451 | struct lttng_filter_bytecode *filter, | |
1452 | struct lttng_event_exclusion *exclusion, | |
1453 | int wpipe); | |
1454 | ||
2f77fc4b | 1455 | /* |
9732459c JG |
1456 | * Internal version of cmd_enable_event() with a supplemental |
1457 | * "internal_event" flag which is used to enable internal events which should | |
1458 | * be hidden from clients. Such events are used in the agent implementation to | |
1459 | * enable the events through which all "agent" events are funeled. | |
2f77fc4b | 1460 | */ |
9732459c JG |
1461 | static int _cmd_enable_event(struct ltt_session *session, |
1462 | struct lttng_domain *domain, | |
025faf73 | 1463 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1464 | char *filter_expression, |
db8f1377 JI |
1465 | struct lttng_filter_bytecode *filter, |
1466 | struct lttng_event_exclusion *exclusion, | |
9732459c | 1467 | int wpipe, bool internal_event) |
2f77fc4b | 1468 | { |
e5f5db7f | 1469 | int ret, channel_created = 0; |
2f77fc4b DG |
1470 | struct lttng_channel *attr; |
1471 | ||
1472 | assert(session); | |
1473 | assert(event); | |
1474 | assert(channel_name); | |
1475 | ||
18a720cd MD |
1476 | DBG("Enable event command for event \'%s\'", event->name); |
1477 | ||
930a2e99 JG |
1478 | ret = validate_event_name(event->name); |
1479 | if (ret) { | |
1480 | goto error; | |
1481 | } | |
1482 | ||
2223c96f DG |
1483 | rcu_read_lock(); |
1484 | ||
7972aab2 | 1485 | switch (domain->type) { |
2f77fc4b DG |
1486 | case LTTNG_DOMAIN_KERNEL: |
1487 | { | |
1488 | struct ltt_kernel_channel *kchan; | |
1489 | ||
85076754 MD |
1490 | /* |
1491 | * If a non-default channel has been created in the | |
1492 | * session, explicitely require that -c chan_name needs | |
1493 | * to be provided. | |
1494 | */ | |
1495 | if (session->kernel_session->has_non_default_channel | |
1496 | && channel_name[0] == '\0') { | |
1497 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1498 | goto error; | |
1499 | } | |
1500 | ||
2f77fc4b DG |
1501 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1502 | session->kernel_session); | |
1503 | if (kchan == NULL) { | |
0a9c6494 DG |
1504 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1505 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1506 | if (attr == NULL) { |
f73fabfd | 1507 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1508 | goto error; |
1509 | } | |
1510 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1511 | ||
1512 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1513 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1514 | free(attr); |
1515 | goto error; | |
1516 | } | |
1517 | free(attr); | |
e5f5db7f DG |
1518 | |
1519 | channel_created = 1; | |
2f77fc4b DG |
1520 | } |
1521 | ||
1522 | /* Get the newly created kernel channel pointer */ | |
1523 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1524 | session->kernel_session); | |
1525 | if (kchan == NULL) { | |
1526 | /* This sould not happen... */ | |
f73fabfd | 1527 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1528 | goto error; |
1529 | } | |
1530 | ||
6e911cad MD |
1531 | switch (event->type) { |
1532 | case LTTNG_EVENT_ALL: | |
29c62722 | 1533 | { |
00a62084 MD |
1534 | char *filter_expression_a = NULL; |
1535 | struct lttng_filter_bytecode *filter_a = NULL; | |
1536 | ||
1537 | /* | |
1538 | * We need to duplicate filter_expression and filter, | |
1539 | * because ownership is passed to first enable | |
1540 | * event. | |
1541 | */ | |
1542 | if (filter_expression) { | |
1543 | filter_expression_a = strdup(filter_expression); | |
1544 | if (!filter_expression_a) { | |
1545 | ret = LTTNG_ERR_FATAL; | |
1546 | goto error; | |
1547 | } | |
1548 | } | |
1549 | if (filter) { | |
1550 | filter_a = zmalloc(sizeof(*filter_a) + filter->len); | |
1551 | if (!filter_a) { | |
1552 | free(filter_expression_a); | |
1553 | ret = LTTNG_ERR_FATAL; | |
1554 | goto error; | |
1555 | } | |
1556 | memcpy(filter_a, filter, sizeof(*filter_a) + filter->len); | |
1557 | } | |
29c62722 | 1558 | event->type = LTTNG_EVENT_TRACEPOINT; /* Hack */ |
00a62084 MD |
1559 | ret = event_kernel_enable_event(kchan, event, |
1560 | filter_expression, filter); | |
a969e101 MD |
1561 | /* We have passed ownership */ |
1562 | filter_expression = NULL; | |
1563 | filter = NULL; | |
29c62722 MD |
1564 | if (ret != LTTNG_OK) { |
1565 | if (channel_created) { | |
1566 | /* Let's not leak a useless channel. */ | |
1567 | kernel_destroy_channel(kchan); | |
1568 | } | |
00a62084 MD |
1569 | free(filter_expression_a); |
1570 | free(filter_a); | |
29c62722 MD |
1571 | goto error; |
1572 | } | |
1573 | event->type = LTTNG_EVENT_SYSCALL; /* Hack */ | |
00a62084 MD |
1574 | ret = event_kernel_enable_event(kchan, event, |
1575 | filter_expression_a, filter_a); | |
29c62722 | 1576 | if (ret != LTTNG_OK) { |
00a62084 MD |
1577 | free(filter_expression_a); |
1578 | free(filter_a); | |
29c62722 MD |
1579 | goto error; |
1580 | } | |
1581 | break; | |
1582 | } | |
6e6ef3d7 DG |
1583 | case LTTNG_EVENT_PROBE: |
1584 | case LTTNG_EVENT_FUNCTION: | |
1585 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad | 1586 | case LTTNG_EVENT_TRACEPOINT: |
00a62084 MD |
1587 | ret = event_kernel_enable_event(kchan, event, |
1588 | filter_expression, filter); | |
a969e101 MD |
1589 | /* We have passed ownership */ |
1590 | filter_expression = NULL; | |
1591 | filter = NULL; | |
6e911cad MD |
1592 | if (ret != LTTNG_OK) { |
1593 | if (channel_created) { | |
1594 | /* Let's not leak a useless channel. */ | |
1595 | kernel_destroy_channel(kchan); | |
1596 | } | |
1597 | goto error; | |
e5f5db7f | 1598 | } |
6e911cad MD |
1599 | break; |
1600 | case LTTNG_EVENT_SYSCALL: | |
00a62084 MD |
1601 | ret = event_kernel_enable_event(kchan, event, |
1602 | filter_expression, filter); | |
a969e101 MD |
1603 | /* We have passed ownership */ |
1604 | filter_expression = NULL; | |
1605 | filter = NULL; | |
e2b957af MD |
1606 | if (ret != LTTNG_OK) { |
1607 | goto error; | |
1608 | } | |
6e911cad MD |
1609 | break; |
1610 | default: | |
1611 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1612 | goto error; |
1613 | } | |
1614 | ||
1615 | kernel_wait_quiescent(kernel_tracer_fd); | |
1616 | break; | |
1617 | } | |
1618 | case LTTNG_DOMAIN_UST: | |
1619 | { | |
1620 | struct ltt_ust_channel *uchan; | |
1621 | struct ltt_ust_session *usess = session->ust_session; | |
1622 | ||
1623 | assert(usess); | |
1624 | ||
85076754 MD |
1625 | /* |
1626 | * If a non-default channel has been created in the | |
1627 | * session, explicitely require that -c chan_name needs | |
1628 | * to be provided. | |
1629 | */ | |
1630 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1631 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1632 | goto error; | |
1633 | } | |
1634 | ||
2f77fc4b DG |
1635 | /* Get channel from global UST domain */ |
1636 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1637 | channel_name); | |
1638 | if (uchan == NULL) { | |
1639 | /* Create default channel */ | |
0a9c6494 DG |
1640 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1641 | usess->buffer_type); | |
2f77fc4b | 1642 | if (attr == NULL) { |
f73fabfd | 1643 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1644 | goto error; |
1645 | } | |
1646 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1647 | ||
1648 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1649 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1650 | free(attr); |
1651 | goto error; | |
1652 | } | |
1653 | free(attr); | |
1654 | ||
1655 | /* Get the newly created channel reference back */ | |
1656 | uchan = trace_ust_find_channel_by_name( | |
1657 | usess->domain_global.channels, channel_name); | |
1658 | assert(uchan); | |
1659 | } | |
1660 | ||
c8100299 JG |
1661 | if (!internal_event) { |
1662 | /* | |
1663 | * Ensure the event name is not reserved for internal | |
1664 | * use. | |
1665 | */ | |
1666 | ret = validate_ust_event_name(event->name); | |
1667 | if (ret) { | |
1668 | WARN("Userspace event name %s failed validation.", | |
1669 | event->name ? | |
1670 | event->name : "NULL"); | |
1671 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1672 | goto error; | |
1673 | } | |
1674 | } | |
1675 | ||
2f77fc4b | 1676 | /* At this point, the session and channel exist on the tracer */ |
6b453b5e | 1677 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
9732459c JG |
1678 | filter_expression, filter, exclusion, |
1679 | internal_event); | |
49d21f93 MD |
1680 | /* We have passed ownership */ |
1681 | filter_expression = NULL; | |
1682 | filter = NULL; | |
1683 | exclusion = NULL; | |
f73fabfd | 1684 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1685 | goto error; |
1686 | } | |
1687 | break; | |
1688 | } | |
5cdb6027 | 1689 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1690 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1691 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1692 | { |
da6c3a50 | 1693 | const char *default_event_name, *default_chan_name; |
fefd409b | 1694 | struct agent *agt; |
f20baf8e DG |
1695 | struct lttng_event uevent; |
1696 | struct lttng_domain tmp_dom; | |
1697 | struct ltt_ust_session *usess = session->ust_session; | |
1698 | ||
1699 | assert(usess); | |
1700 | ||
5cdb6027 | 1701 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 1702 | if (!agt) { |
5cdb6027 | 1703 | agt = agent_create(domain->type); |
fefd409b DG |
1704 | if (!agt) { |
1705 | ret = -LTTNG_ERR_NOMEM; | |
1706 | goto error; | |
1707 | } | |
1708 | agent_add(agt, usess->agents); | |
1709 | } | |
1710 | ||
022d91ba | 1711 | /* Create the default tracepoint. */ |
996de3c7 | 1712 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
1713 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1714 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
da6c3a50 DG |
1715 | default_event_name = event_get_default_agent_ust_name(domain->type); |
1716 | if (!default_event_name) { | |
1717 | ret = -LTTNG_ERR_FATAL; | |
1718 | goto error; | |
f43f95a9 | 1719 | } |
da6c3a50 | 1720 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
1721 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1722 | ||
1723 | /* | |
1724 | * The domain type is changed because we are about to enable the | |
1725 | * default channel and event for the JUL domain that are hardcoded. | |
1726 | * This happens in the UST domain. | |
1727 | */ | |
1728 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1729 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1730 | ||
0e115563 DG |
1731 | switch (domain->type) { |
1732 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 1733 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
1734 | break; |
1735 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 1736 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
1737 | break; |
1738 | case LTTNG_DOMAIN_PYTHON: | |
1739 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
1740 | break; | |
1741 | default: | |
1742 | /* The switch/case we are in should avoid this else big problem */ | |
1743 | assert(0); | |
da6c3a50 DG |
1744 | } |
1745 | ||
971da06a JG |
1746 | { |
1747 | struct lttng_filter_bytecode *filter_copy = NULL; | |
1748 | ||
1749 | if (filter) { | |
1750 | filter_copy = zmalloc( | |
1751 | sizeof(struct lttng_filter_bytecode) | |
1752 | + filter->len); | |
1753 | if (!filter_copy) { | |
1754 | goto error; | |
1755 | } | |
1756 | ||
1757 | memcpy(filter_copy, filter, | |
1758 | sizeof(struct lttng_filter_bytecode) | |
1759 | + filter->len); | |
1760 | } | |
1761 | ||
9732459c | 1762 | ret = cmd_enable_event_internal(session, &tmp_dom, |
971da06a JG |
1763 | (char *) default_chan_name, |
1764 | &uevent, filter_expression, filter_copy, | |
1765 | NULL, wpipe); | |
1766 | /* We have passed ownership */ | |
1767 | filter_expression = NULL; | |
1768 | } | |
1769 | ||
f20baf8e DG |
1770 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1771 | goto error; | |
1772 | } | |
1773 | ||
1774 | /* The wild card * means that everything should be enabled. */ | |
1775 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
fefd409b | 1776 | ret = event_agent_enable_all(usess, agt, event, filter); |
971da06a | 1777 | filter = NULL; |
f20baf8e | 1778 | } else { |
fefd409b | 1779 | ret = event_agent_enable(usess, agt, event, filter); |
971da06a | 1780 | filter = NULL; |
f20baf8e DG |
1781 | } |
1782 | if (ret != LTTNG_OK) { | |
1783 | goto error; | |
1784 | } | |
1785 | ||
1786 | break; | |
1787 | } | |
2f77fc4b | 1788 | default: |
f73fabfd | 1789 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1790 | goto error; |
1791 | } | |
1792 | ||
f73fabfd | 1793 | ret = LTTNG_OK; |
2f77fc4b DG |
1794 | |
1795 | error: | |
49d21f93 MD |
1796 | free(filter_expression); |
1797 | free(filter); | |
1798 | free(exclusion); | |
2223c96f | 1799 | rcu_read_unlock(); |
2f77fc4b DG |
1800 | return ret; |
1801 | } | |
1802 | ||
9732459c JG |
1803 | /* |
1804 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
1805 | * We own filter, exclusion, and filter_expression. | |
1806 | */ | |
1807 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, | |
1808 | char *channel_name, struct lttng_event *event, | |
1809 | char *filter_expression, | |
1810 | struct lttng_filter_bytecode *filter, | |
1811 | struct lttng_event_exclusion *exclusion, | |
1812 | int wpipe) | |
1813 | { | |
1814 | return _cmd_enable_event(session, domain, channel_name, event, | |
1815 | filter_expression, filter, exclusion, wpipe, false); | |
1816 | } | |
1817 | ||
1818 | /* | |
1819 | * Enable an event which is internal to LTTng. An internal should | |
1820 | * never be made visible to clients and are immune to checks such as | |
1821 | * reserved names. | |
1822 | */ | |
1823 | static int cmd_enable_event_internal(struct ltt_session *session, | |
1824 | struct lttng_domain *domain, | |
1825 | char *channel_name, struct lttng_event *event, | |
1826 | char *filter_expression, | |
1827 | struct lttng_filter_bytecode *filter, | |
1828 | struct lttng_event_exclusion *exclusion, | |
1829 | int wpipe) | |
1830 | { | |
1831 | return _cmd_enable_event(session, domain, channel_name, event, | |
1832 | filter_expression, filter, exclusion, wpipe, true); | |
1833 | } | |
1834 | ||
2f77fc4b DG |
1835 | /* |
1836 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1837 | */ | |
1838 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1839 | { | |
1840 | int ret; | |
1841 | ssize_t nb_events = 0; | |
1842 | ||
1843 | switch (domain) { | |
1844 | case LTTNG_DOMAIN_KERNEL: | |
1845 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1846 | if (nb_events < 0) { | |
f73fabfd | 1847 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1848 | goto error; |
1849 | } | |
1850 | break; | |
1851 | case LTTNG_DOMAIN_UST: | |
1852 | nb_events = ust_app_list_events(events); | |
1853 | if (nb_events < 0) { | |
f73fabfd | 1854 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1855 | goto error; |
1856 | } | |
1857 | break; | |
5cdb6027 | 1858 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 1859 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1860 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 1861 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
1862 | if (nb_events < 0) { |
1863 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1864 | goto error; | |
1865 | } | |
1866 | break; | |
2f77fc4b | 1867 | default: |
f73fabfd | 1868 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1869 | goto error; |
1870 | } | |
1871 | ||
1872 | return nb_events; | |
1873 | ||
1874 | error: | |
1875 | /* Return negative value to differentiate return code */ | |
1876 | return -ret; | |
1877 | } | |
1878 | ||
1879 | /* | |
1880 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1881 | */ | |
1882 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1883 | struct lttng_event_field **fields) | |
1884 | { | |
1885 | int ret; | |
1886 | ssize_t nb_fields = 0; | |
1887 | ||
1888 | switch (domain) { | |
1889 | case LTTNG_DOMAIN_UST: | |
1890 | nb_fields = ust_app_list_event_fields(fields); | |
1891 | if (nb_fields < 0) { | |
f73fabfd | 1892 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1893 | goto error; |
1894 | } | |
1895 | break; | |
1896 | case LTTNG_DOMAIN_KERNEL: | |
1897 | default: /* fall-through */ | |
f73fabfd | 1898 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1899 | goto error; |
1900 | } | |
1901 | ||
1902 | return nb_fields; | |
1903 | ||
1904 | error: | |
1905 | /* Return negative value to differentiate return code */ | |
1906 | return -ret; | |
1907 | } | |
1908 | ||
834978fd DG |
1909 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
1910 | { | |
1911 | return syscall_table_list(events); | |
1912 | } | |
1913 | ||
a5dfbb9d MD |
1914 | /* |
1915 | * Command LTTNG_LIST_TRACKER_PIDS processed by the client thread. | |
1916 | * | |
1917 | * Called with session lock held. | |
1918 | */ | |
1919 | ssize_t cmd_list_tracker_pids(struct ltt_session *session, | |
1920 | int domain, int32_t **pids) | |
1921 | { | |
1922 | int ret; | |
1923 | ssize_t nr_pids = 0; | |
1924 | ||
1925 | switch (domain) { | |
1926 | case LTTNG_DOMAIN_KERNEL: | |
1927 | { | |
1928 | struct ltt_kernel_session *ksess; | |
1929 | ||
1930 | ksess = session->kernel_session; | |
1931 | nr_pids = kernel_list_tracker_pids(ksess, pids); | |
1932 | if (nr_pids < 0) { | |
1933 | ret = LTTNG_ERR_KERN_LIST_FAIL; | |
1934 | goto error; | |
1935 | } | |
1936 | break; | |
1937 | } | |
1938 | case LTTNG_DOMAIN_UST: | |
1939 | { | |
1940 | struct ltt_ust_session *usess; | |
1941 | ||
1942 | usess = session->ust_session; | |
1943 | nr_pids = trace_ust_list_tracker_pids(usess, pids); | |
1944 | if (nr_pids < 0) { | |
1945 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1946 | goto error; | |
1947 | } | |
1948 | break; | |
1949 | } | |
1950 | case LTTNG_DOMAIN_LOG4J: | |
1951 | case LTTNG_DOMAIN_JUL: | |
1952 | case LTTNG_DOMAIN_PYTHON: | |
1953 | default: | |
1954 | ret = LTTNG_ERR_UND; | |
1955 | goto error; | |
1956 | } | |
1957 | ||
1958 | return nr_pids; | |
1959 | ||
1960 | error: | |
1961 | /* Return negative value to differentiate return code */ | |
1962 | return -ret; | |
1963 | } | |
1964 | ||
2f77fc4b DG |
1965 | /* |
1966 | * Command LTTNG_START_TRACE processed by the client thread. | |
a9ad0c8f MD |
1967 | * |
1968 | * Called with session mutex held. | |
2f77fc4b DG |
1969 | */ |
1970 | int cmd_start_trace(struct ltt_session *session) | |
1971 | { | |
1972 | int ret; | |
cde3e505 | 1973 | unsigned long nb_chan = 0; |
2f77fc4b DG |
1974 | struct ltt_kernel_session *ksession; |
1975 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1976 | |
1977 | assert(session); | |
1978 | ||
1979 | /* Ease our life a bit ;) */ | |
1980 | ksession = session->kernel_session; | |
1981 | usess = session->ust_session; | |
1982 | ||
8382cf6f DG |
1983 | /* Is the session already started? */ |
1984 | if (session->active) { | |
f73fabfd | 1985 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1986 | goto error; |
1987 | } | |
1988 | ||
cde3e505 DG |
1989 | /* |
1990 | * Starting a session without channel is useless since after that it's not | |
1991 | * possible to enable channel thus inform the client. | |
1992 | */ | |
1993 | if (usess && usess->domain_global.channels) { | |
a9e41044 | 1994 | rcu_read_lock(); |
cde3e505 | 1995 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); |
a9e41044 | 1996 | rcu_read_unlock(); |
cde3e505 DG |
1997 | } |
1998 | if (ksession) { | |
1999 | nb_chan += ksession->channel_count; | |
2000 | } | |
2001 | if (!nb_chan) { | |
2002 | ret = LTTNG_ERR_NO_CHANNEL; | |
2003 | goto error; | |
2004 | } | |
2005 | ||
2f77fc4b DG |
2006 | /* Kernel tracing */ |
2007 | if (ksession != NULL) { | |
9b6c7ec5 DG |
2008 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
2009 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
2010 | goto error; |
2011 | } | |
2f77fc4b DG |
2012 | } |
2013 | ||
2014 | /* Flag session that trace should start automatically */ | |
2015 | if (usess) { | |
14fb1ebe DG |
2016 | /* |
2017 | * Even though the start trace might fail, flag this session active so | |
2018 | * other application coming in are started by default. | |
2019 | */ | |
2020 | usess->active = 1; | |
2f77fc4b DG |
2021 | |
2022 | ret = ust_app_start_trace_all(usess); | |
2023 | if (ret < 0) { | |
f73fabfd | 2024 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2025 | goto error; |
2026 | } | |
2027 | } | |
2028 | ||
8382cf6f DG |
2029 | /* Flag this after a successful start. */ |
2030 | session->has_been_started = 1; | |
2031 | session->active = 1; | |
9b6c7ec5 | 2032 | |
f73fabfd | 2033 | ret = LTTNG_OK; |
2f77fc4b DG |
2034 | |
2035 | error: | |
2036 | return ret; | |
2037 | } | |
2038 | ||
2039 | /* | |
2040 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2041 | */ | |
2042 | int cmd_stop_trace(struct ltt_session *session) | |
2043 | { | |
2044 | int ret; | |
2045 | struct ltt_kernel_channel *kchan; | |
2046 | struct ltt_kernel_session *ksession; | |
2047 | struct ltt_ust_session *usess; | |
2048 | ||
2049 | assert(session); | |
2050 | ||
2051 | /* Short cut */ | |
2052 | ksession = session->kernel_session; | |
2053 | usess = session->ust_session; | |
2054 | ||
8382cf6f DG |
2055 | /* Session is not active. Skip everythong and inform the client. */ |
2056 | if (!session->active) { | |
f73fabfd | 2057 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2058 | goto error; |
2059 | } | |
2060 | ||
2f77fc4b | 2061 | /* Kernel tracer */ |
14fb1ebe | 2062 | if (ksession && ksession->active) { |
2f77fc4b DG |
2063 | DBG("Stop kernel tracing"); |
2064 | ||
2065 | /* Flush metadata if exist */ | |
2066 | if (ksession->metadata_stream_fd >= 0) { | |
2067 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2068 | if (ret < 0) { | |
2069 | ERR("Kernel metadata flush failed"); | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | /* Flush all buffers before stopping */ | |
2074 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2075 | ret = kernel_flush_buffer(kchan); | |
2076 | if (ret < 0) { | |
2077 | ERR("Kernel flush buffer error"); | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | ret = kernel_stop_session(ksession); | |
2082 | if (ret < 0) { | |
f73fabfd | 2083 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
2084 | goto error; |
2085 | } | |
2086 | ||
2087 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 | 2088 | |
14fb1ebe | 2089 | ksession->active = 0; |
2f77fc4b DG |
2090 | } |
2091 | ||
14fb1ebe DG |
2092 | if (usess && usess->active) { |
2093 | /* | |
2094 | * Even though the stop trace might fail, flag this session inactive so | |
2095 | * other application coming in are not started by default. | |
2096 | */ | |
2097 | usess->active = 0; | |
2f77fc4b DG |
2098 | |
2099 | ret = ust_app_stop_trace_all(usess); | |
2100 | if (ret < 0) { | |
f73fabfd | 2101 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2102 | goto error; |
2103 | } | |
2104 | } | |
2105 | ||
8382cf6f DG |
2106 | /* Flag inactive after a successful stop. */ |
2107 | session->active = 0; | |
f73fabfd | 2108 | ret = LTTNG_OK; |
2f77fc4b DG |
2109 | |
2110 | error: | |
2111 | return ret; | |
2112 | } | |
2113 | ||
2114 | /* | |
2115 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2116 | */ | |
bda32d56 JG |
2117 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, |
2118 | struct lttng_uri *uris) | |
2f77fc4b DG |
2119 | { |
2120 | int ret, i; | |
2121 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2122 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
2123 | |
2124 | assert(session); | |
2125 | assert(uris); | |
2126 | assert(nb_uri > 0); | |
2127 | ||
8382cf6f DG |
2128 | /* Can't set consumer URI if the session is active. */ |
2129 | if (session->active) { | |
f73fabfd | 2130 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2131 | goto error; |
2132 | } | |
2133 | ||
bda32d56 | 2134 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2135 | for (i = 0; i < nb_uri; i++) { |
bda32d56 JG |
2136 | ret = add_uri_to_consumer(session->consumer, |
2137 | &uris[i], 0, session->name); | |
a74934ba | 2138 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2139 | goto error; |
2140 | } | |
2f77fc4b DG |
2141 | } |
2142 | ||
bda32d56 JG |
2143 | /* Set UST session URIs */ |
2144 | if (session->ust_session) { | |
2145 | for (i = 0; i < nb_uri; i++) { | |
2146 | ret = add_uri_to_consumer( | |
2147 | session->ust_session->consumer, | |
2148 | &uris[i], LTTNG_DOMAIN_UST, | |
2149 | session->name); | |
2150 | if (ret != LTTNG_OK) { | |
2151 | goto error; | |
2152 | } | |
2153 | } | |
2154 | } | |
2155 | ||
2156 | /* Set kernel session URIs */ | |
2157 | if (session->kernel_session) { | |
2158 | for (i = 0; i < nb_uri; i++) { | |
2159 | ret = add_uri_to_consumer( | |
2160 | session->kernel_session->consumer, | |
2161 | &uris[i], LTTNG_DOMAIN_KERNEL, | |
2162 | session->name); | |
2163 | if (ret != LTTNG_OK) { | |
2164 | goto error; | |
2165 | } | |
2166 | } | |
2167 | } | |
2168 | ||
7ab70fe0 DG |
2169 | /* |
2170 | * Make sure to set the session in output mode after we set URI since a | |
2171 | * session can be created without URL (thus flagged in no output mode). | |
2172 | */ | |
2173 | session->output_traces = 1; | |
2174 | if (ksess) { | |
2175 | ksess->output_traces = 1; | |
bda32d56 JG |
2176 | } |
2177 | ||
2178 | if (usess) { | |
7ab70fe0 DG |
2179 | usess->output_traces = 1; |
2180 | } | |
2181 | ||
2f77fc4b | 2182 | /* All good! */ |
f73fabfd | 2183 | ret = LTTNG_OK; |
2f77fc4b DG |
2184 | |
2185 | error: | |
2186 | return ret; | |
2187 | } | |
2188 | ||
2189 | /* | |
2190 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2191 | */ | |
2192 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2193 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2194 | { |
2195 | int ret; | |
2f77fc4b DG |
2196 | struct ltt_session *session; |
2197 | ||
2198 | assert(name); | |
2bba9e53 | 2199 | assert(creds); |
785d2d0d | 2200 | |
2f77fc4b DG |
2201 | /* |
2202 | * Verify if the session already exist | |
2203 | * | |
2204 | * XXX: There is no need for the session lock list here since the caller | |
2205 | * (process_client_msg) is holding it. We might want to change that so a | |
2206 | * single command does not lock the entire session list. | |
2207 | */ | |
2208 | session = session_find_by_name(name); | |
2209 | if (session != NULL) { | |
f73fabfd | 2210 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2211 | goto find_error; |
2212 | } | |
2213 | ||
2214 | /* Create tracing session in the registry */ | |
dec56f6c | 2215 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2216 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2217 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2218 | goto session_error; |
2219 | } | |
2220 | ||
2221 | /* | |
2222 | * Get the newly created session pointer back | |
2223 | * | |
2224 | * XXX: There is no need for the session lock list here since the caller | |
2225 | * (process_client_msg) is holding it. We might want to change that so a | |
2226 | * single command does not lock the entire session list. | |
2227 | */ | |
2228 | session = session_find_by_name(name); | |
2229 | assert(session); | |
2230 | ||
ecc48a90 | 2231 | session->live_timer = live_timer; |
2f77fc4b DG |
2232 | /* Create default consumer output for the session not yet created. */ |
2233 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2234 | if (session->consumer == NULL) { | |
f73fabfd | 2235 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2236 | goto consumer_error; |
2237 | } | |
2238 | ||
2bba9e53 | 2239 | if (uris) { |
bda32d56 | 2240 | ret = cmd_set_consumer_uri(session, nb_uri, uris); |
2bba9e53 DG |
2241 | if (ret != LTTNG_OK) { |
2242 | goto consumer_error; | |
2243 | } | |
2244 | session->output_traces = 1; | |
2245 | } else { | |
2246 | session->output_traces = 0; | |
2247 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2248 | } |
2249 | ||
2250 | session->consumer->enabled = 1; | |
2251 | ||
f73fabfd | 2252 | return LTTNG_OK; |
2f77fc4b DG |
2253 | |
2254 | consumer_error: | |
2255 | session_destroy(session); | |
2256 | session_error: | |
2257 | find_error: | |
2258 | return ret; | |
2259 | } | |
2260 | ||
27babd3a DG |
2261 | /* |
2262 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2263 | */ | |
2264 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2265 | size_t nb_uri, lttng_sock_cred *creds) | |
2266 | { | |
2267 | int ret; | |
2268 | struct ltt_session *session; | |
2269 | struct snapshot_output *new_output = NULL; | |
2270 | ||
2271 | assert(name); | |
2272 | assert(creds); | |
2273 | ||
2274 | /* | |
2275 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2276 | * received are for a default snapshot output if one. | |
2277 | */ | |
ecc48a90 | 2278 | ret = cmd_create_session_uri(name, NULL, 0, creds, -1); |
27babd3a DG |
2279 | if (ret != LTTNG_OK) { |
2280 | goto error; | |
2281 | } | |
2282 | ||
2283 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2284 | session = session_find_by_name(name); | |
2285 | assert(session); | |
2286 | ||
2287 | /* Flag session for snapshot mode. */ | |
2288 | session->snapshot_mode = 1; | |
2289 | ||
2290 | /* Skip snapshot output creation if no URI is given. */ | |
2291 | if (nb_uri == 0) { | |
2292 | goto end; | |
2293 | } | |
2294 | ||
2295 | new_output = snapshot_output_alloc(); | |
2296 | if (!new_output) { | |
2297 | ret = LTTNG_ERR_NOMEM; | |
2298 | goto error_snapshot_alloc; | |
2299 | } | |
2300 | ||
2301 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2302 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2303 | if (ret < 0) { | |
2304 | if (ret == -ENOMEM) { | |
2305 | ret = LTTNG_ERR_NOMEM; | |
2306 | } else { | |
2307 | ret = LTTNG_ERR_INVALID; | |
2308 | } | |
2309 | goto error_snapshot; | |
2310 | } | |
2311 | ||
2312 | rcu_read_lock(); | |
2313 | snapshot_add_output(&session->snapshot, new_output); | |
2314 | rcu_read_unlock(); | |
2315 | ||
2316 | end: | |
2317 | return LTTNG_OK; | |
2318 | ||
2319 | error_snapshot: | |
2320 | snapshot_output_destroy(new_output); | |
2321 | error_snapshot_alloc: | |
2322 | session_destroy(session); | |
2323 | error: | |
2324 | return ret; | |
2325 | } | |
2326 | ||
2f77fc4b DG |
2327 | /* |
2328 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
a9ad0c8f MD |
2329 | * |
2330 | * Called with session lock held. | |
2f77fc4b DG |
2331 | */ |
2332 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2333 | { | |
2334 | int ret; | |
2335 | struct ltt_ust_session *usess; | |
2336 | struct ltt_kernel_session *ksess; | |
2337 | ||
2338 | /* Safety net */ | |
2339 | assert(session); | |
2340 | ||
2341 | usess = session->ust_session; | |
2342 | ksess = session->kernel_session; | |
2343 | ||
2344 | /* Clean kernel session teardown */ | |
2345 | kernel_destroy_session(ksess); | |
2346 | ||
2347 | /* UST session teardown */ | |
2348 | if (usess) { | |
2349 | /* Close any relayd session */ | |
2350 | consumer_output_send_destroy_relayd(usess->consumer); | |
2351 | ||
2352 | /* Destroy every UST application related to this session. */ | |
2353 | ret = ust_app_destroy_trace_all(usess); | |
2354 | if (ret) { | |
2355 | ERR("Error in ust_app_destroy_trace_all"); | |
2356 | } | |
2357 | ||
2358 | /* Clean up the rest. */ | |
2359 | trace_ust_destroy_session(usess); | |
2360 | } | |
2361 | ||
2362 | /* | |
2363 | * Must notify the kernel thread here to update it's poll set in order to | |
2364 | * remove the channel(s)' fd just destroyed. | |
2365 | */ | |
2366 | ret = notify_thread_pipe(wpipe); | |
2367 | if (ret < 0) { | |
2368 | PERROR("write kernel poll pipe"); | |
2369 | } | |
2370 | ||
2371 | ret = session_destroy(session); | |
2372 | ||
2373 | return ret; | |
2374 | } | |
2375 | ||
2376 | /* | |
2377 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2378 | */ | |
2379 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2380 | { | |
2381 | int ret; | |
2382 | ||
2383 | switch (domain) { | |
2384 | case LTTNG_DOMAIN_KERNEL: | |
2385 | { | |
2386 | struct lttng_kernel_calibrate kcalibrate; | |
2387 | ||
2e84128e DG |
2388 | switch (calibrate->type) { |
2389 | case LTTNG_CALIBRATE_FUNCTION: | |
2390 | default: | |
2391 | /* Default and only possible calibrate option. */ | |
2392 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2393 | break; | |
2394 | } | |
2395 | ||
2f77fc4b DG |
2396 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2397 | if (ret < 0) { | |
f73fabfd | 2398 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2399 | goto error; |
2400 | } | |
2401 | break; | |
2402 | } | |
2403 | case LTTNG_DOMAIN_UST: | |
2404 | { | |
2405 | struct lttng_ust_calibrate ucalibrate; | |
2406 | ||
2e84128e DG |
2407 | switch (calibrate->type) { |
2408 | case LTTNG_CALIBRATE_FUNCTION: | |
2409 | default: | |
2410 | /* Default and only possible calibrate option. */ | |
2411 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2412 | break; | |
2413 | } | |
2414 | ||
2f77fc4b DG |
2415 | ret = ust_app_calibrate_glb(&ucalibrate); |
2416 | if (ret < 0) { | |
f73fabfd | 2417 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2418 | goto error; |
2419 | } | |
2420 | break; | |
2421 | } | |
2422 | default: | |
f73fabfd | 2423 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2424 | goto error; |
2425 | } | |
2426 | ||
f73fabfd | 2427 | ret = LTTNG_OK; |
2f77fc4b DG |
2428 | |
2429 | error: | |
2430 | return ret; | |
2431 | } | |
2432 | ||
2433 | /* | |
2434 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2435 | */ | |
2436 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2437 | const char *sock_path, struct consumer_data *cdata) | |
2438 | { | |
2439 | int ret, sock; | |
dd81b457 | 2440 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2441 | |
2442 | assert(session); | |
2443 | assert(cdata); | |
2444 | assert(sock_path); | |
2445 | ||
2446 | switch (domain) { | |
2447 | case LTTNG_DOMAIN_KERNEL: | |
2448 | { | |
2449 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2450 | ||
2451 | assert(ksess); | |
2452 | ||
2453 | /* Can't register a consumer if there is already one */ | |
2454 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2455 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2456 | goto error; |
2457 | } | |
2458 | ||
2459 | sock = lttcomm_connect_unix_sock(sock_path); | |
2460 | if (sock < 0) { | |
f73fabfd | 2461 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2462 | goto error; |
2463 | } | |
4ce514c4 | 2464 | cdata->cmd_sock = sock; |
2f77fc4b | 2465 | |
4ce514c4 | 2466 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2467 | if (socket == NULL) { |
f66c074c DG |
2468 | ret = close(sock); |
2469 | if (ret < 0) { | |
2470 | PERROR("close register consumer"); | |
2471 | } | |
4ce514c4 | 2472 | cdata->cmd_sock = -1; |
f73fabfd | 2473 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2474 | goto error; |
2475 | } | |
2476 | ||
2477 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2478 | if (socket->lock == NULL) { | |
2479 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2480 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2481 | goto error; |
2482 | } | |
2483 | pthread_mutex_init(socket->lock, NULL); | |
2484 | socket->registered = 1; | |
2485 | ||
2486 | rcu_read_lock(); | |
2487 | consumer_add_socket(socket, ksess->consumer); | |
2488 | rcu_read_unlock(); | |
2489 | ||
2490 | pthread_mutex_lock(&cdata->pid_mutex); | |
2491 | cdata->pid = -1; | |
2492 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2493 | ||
2494 | break; | |
2495 | } | |
2496 | default: | |
2497 | /* TODO: Userspace tracing */ | |
f73fabfd | 2498 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2499 | goto error; |
2500 | } | |
2501 | ||
dd81b457 | 2502 | return LTTNG_OK; |
2f77fc4b DG |
2503 | |
2504 | error: | |
dd81b457 DG |
2505 | if (socket) { |
2506 | consumer_destroy_socket(socket); | |
2507 | } | |
2f77fc4b DG |
2508 | return ret; |
2509 | } | |
2510 | ||
2511 | /* | |
2512 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2513 | */ | |
2514 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2515 | struct lttng_domain **domains) | |
2516 | { | |
2517 | int ret, index = 0; | |
2518 | ssize_t nb_dom = 0; | |
fefd409b DG |
2519 | struct agent *agt; |
2520 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2521 | |
2522 | if (session->kernel_session != NULL) { | |
2523 | DBG3("Listing domains found kernel domain"); | |
2524 | nb_dom++; | |
2525 | } | |
2526 | ||
2527 | if (session->ust_session != NULL) { | |
2528 | DBG3("Listing domains found UST global domain"); | |
2529 | nb_dom++; | |
3c6a091f | 2530 | |
e0a74f01 | 2531 | rcu_read_lock(); |
fefd409b DG |
2532 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2533 | agt, node.node) { | |
2534 | if (agt->being_used) { | |
2535 | nb_dom++; | |
2536 | } | |
3c6a091f | 2537 | } |
e0a74f01 | 2538 | rcu_read_unlock(); |
2f77fc4b DG |
2539 | } |
2540 | ||
fa64dfb4 JG |
2541 | if (!nb_dom) { |
2542 | goto end; | |
2543 | } | |
2544 | ||
2f77fc4b DG |
2545 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
2546 | if (*domains == NULL) { | |
f73fabfd | 2547 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2548 | goto error; |
2549 | } | |
2550 | ||
2551 | if (session->kernel_session != NULL) { | |
2552 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
bd3381e3 PP |
2553 | |
2554 | /* Kernel session buffer type is always GLOBAL */ | |
2555 | (*domains)[index].buf_type = LTTNG_BUFFER_GLOBAL; | |
2556 | ||
2f77fc4b DG |
2557 | index++; |
2558 | } | |
2559 | ||
2560 | if (session->ust_session != NULL) { | |
2561 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2562 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2563 | index++; |
3c6a091f | 2564 | |
e0a74f01 | 2565 | rcu_read_lock(); |
fefd409b DG |
2566 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2567 | agt, node.node) { | |
2568 | if (agt->being_used) { | |
2569 | (*domains)[index].type = agt->domain; | |
2570 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2571 | index++; | |
2572 | } | |
3c6a091f | 2573 | } |
e0a74f01 | 2574 | rcu_read_unlock(); |
2f77fc4b | 2575 | } |
fa64dfb4 | 2576 | end: |
2f77fc4b DG |
2577 | return nb_dom; |
2578 | ||
2579 | error: | |
f73fabfd DG |
2580 | /* Return negative value to differentiate return code */ |
2581 | return -ret; | |
2f77fc4b DG |
2582 | } |
2583 | ||
2584 | ||
2585 | /* | |
2586 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2587 | */ | |
2588 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2589 | struct lttng_channel **channels) | |
2590 | { | |
2591 | int ret; | |
2592 | ssize_t nb_chan = 0; | |
2593 | ||
2594 | switch (domain) { | |
2595 | case LTTNG_DOMAIN_KERNEL: | |
2596 | if (session->kernel_session != NULL) { | |
2597 | nb_chan = session->kernel_session->channel_count; | |
2598 | } | |
2599 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2600 | if (nb_chan <= 0) { |
2601 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2602 | } | |
2f77fc4b DG |
2603 | break; |
2604 | case LTTNG_DOMAIN_UST: | |
2605 | if (session->ust_session != NULL) { | |
7ffc31a2 | 2606 | rcu_read_lock(); |
2f77fc4b | 2607 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
2608 | session->ust_session->domain_global.channels); |
2609 | rcu_read_unlock(); | |
2f77fc4b DG |
2610 | } |
2611 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 2612 | if (nb_chan < 0) { |
c7d620a2 | 2613 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
ade7ce52 | 2614 | goto error; |
c7d620a2 | 2615 | } |
2f77fc4b DG |
2616 | break; |
2617 | default: | |
f73fabfd | 2618 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2619 | goto error; |
2620 | } | |
2621 | ||
2622 | if (nb_chan > 0) { | |
2623 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2624 | if (*channels == NULL) { | |
f73fabfd | 2625 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2626 | goto error; |
2627 | } | |
2628 | ||
2629 | list_lttng_channels(domain, session, *channels); | |
2f77fc4b DG |
2630 | } |
2631 | ||
2632 | return nb_chan; | |
2633 | ||
2634 | error: | |
f73fabfd DG |
2635 | /* Return negative value to differentiate return code */ |
2636 | return -ret; | |
2f77fc4b DG |
2637 | } |
2638 | ||
2639 | /* | |
2640 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2641 | */ | |
2642 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2643 | char *channel_name, struct lttng_event **events) | |
2644 | { | |
2645 | int ret = 0; | |
2646 | ssize_t nb_event = 0; | |
2647 | ||
2648 | switch (domain) { | |
2649 | case LTTNG_DOMAIN_KERNEL: | |
2650 | if (session->kernel_session != NULL) { | |
2651 | nb_event = list_lttng_kernel_events(channel_name, | |
2652 | session->kernel_session, events); | |
2653 | } | |
2654 | break; | |
2655 | case LTTNG_DOMAIN_UST: | |
2656 | { | |
2657 | if (session->ust_session != NULL) { | |
2658 | nb_event = list_lttng_ust_global_events(channel_name, | |
2659 | &session->ust_session->domain_global, events); | |
2660 | } | |
2661 | break; | |
2662 | } | |
5cdb6027 | 2663 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2664 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2665 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 2666 | if (session->ust_session) { |
fefd409b DG |
2667 | struct lttng_ht_iter iter; |
2668 | struct agent *agt; | |
2669 | ||
b11feea5 | 2670 | rcu_read_lock(); |
fefd409b DG |
2671 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
2672 | &iter.iter, agt, node.node) { | |
2673 | nb_event = list_lttng_agent_events(agt, events); | |
2674 | } | |
b11feea5 | 2675 | rcu_read_unlock(); |
3c6a091f DG |
2676 | } |
2677 | break; | |
2f77fc4b | 2678 | default: |
f73fabfd | 2679 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2680 | goto error; |
2681 | } | |
2682 | ||
f73fabfd | 2683 | return nb_event; |
2f77fc4b DG |
2684 | |
2685 | error: | |
f73fabfd DG |
2686 | /* Return negative value to differentiate return code */ |
2687 | return -ret; | |
2f77fc4b DG |
2688 | } |
2689 | ||
2690 | /* | |
2691 | * Using the session list, filled a lttng_session array to send back to the | |
2692 | * client for session listing. | |
2693 | * | |
2694 | * The session list lock MUST be acquired before calling this function. Use | |
2695 | * session_lock_list() and session_unlock_list(). | |
2696 | */ | |
2697 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2698 | gid_t gid) | |
2699 | { | |
2700 | int ret; | |
2701 | unsigned int i = 0; | |
2702 | struct ltt_session *session; | |
2703 | struct ltt_session_list *list = session_get_list(); | |
2704 | ||
2705 | DBG("Getting all available session for UID %d GID %d", | |
2706 | uid, gid); | |
2707 | /* | |
2708 | * Iterate over session list and append data after the control struct in | |
2709 | * the buffer. | |
2710 | */ | |
2711 | cds_list_for_each_entry(session, &list->head, list) { | |
2712 | /* | |
2713 | * Only list the sessions the user can control. | |
2714 | */ | |
2715 | if (!session_access_ok(session, uid, gid)) { | |
2716 | continue; | |
2717 | } | |
2718 | ||
2719 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2720 | struct ltt_ust_session *usess = session->ust_session; | |
2721 | ||
2722 | if (session->consumer->type == CONSUMER_DST_NET || | |
2723 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2724 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2725 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2726 | sizeof(sessions[i].path), session); |
2f77fc4b | 2727 | } else { |
dec56f6c | 2728 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2729 | session->consumer->dst.trace_path); |
2730 | } | |
2731 | if (ret < 0) { | |
2732 | PERROR("snprintf session path"); | |
2733 | continue; | |
2734 | } | |
2735 | ||
2736 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2737 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 2738 | sessions[i].enabled = session->active; |
2cbf8fed | 2739 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 2740 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
2741 | i++; |
2742 | } | |
2743 | } | |
2744 | ||
806e2684 | 2745 | /* |
6d805429 | 2746 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2747 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2748 | */ |
6d805429 | 2749 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2750 | { |
2751 | int ret; | |
2752 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2753 | struct ltt_ust_session *usess = session->ust_session; | |
2754 | ||
2755 | assert(session); | |
2756 | ||
2757 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 2758 | if (session->active) { |
806e2684 DG |
2759 | ret = LTTNG_ERR_SESSION_STARTED; |
2760 | goto error; | |
3a89d11a DG |
2761 | } else { |
2762 | /* | |
2763 | * If stopped, just make sure we've started before else the above call | |
2764 | * will always send that there is data pending. | |
2765 | * | |
2766 | * The consumer assumes that when the data pending command is received, | |
2767 | * the trace has been started before or else no output data is written | |
2768 | * by the streams which is a condition for data pending. So, this is | |
2769 | * *VERY* important that we don't ask the consumer before a start | |
2770 | * trace. | |
2771 | */ | |
8382cf6f | 2772 | if (!session->has_been_started) { |
3a89d11a DG |
2773 | ret = 0; |
2774 | goto error; | |
2775 | } | |
806e2684 DG |
2776 | } |
2777 | ||
2778 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2779 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2780 | if (ret == 1) { | |
806e2684 DG |
2781 | /* Data is still being extracted for the kernel. */ |
2782 | goto error; | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | if (usess && usess->consumer) { | |
6d805429 DG |
2787 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2788 | if (ret == 1) { | |
806e2684 DG |
2789 | /* Data is still being extracted for the kernel. */ |
2790 | goto error; | |
2791 | } | |
2792 | } | |
2793 | ||
2794 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2795 | ret = 0; |
806e2684 DG |
2796 | |
2797 | error: | |
2798 | return ret; | |
2799 | } | |
2800 | ||
6dc3064a DG |
2801 | /* |
2802 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2803 | * | |
2804 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2805 | */ | |
2806 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2807 | struct lttng_snapshot_output *output, uint32_t *id) | |
2808 | { | |
2809 | int ret; | |
2810 | struct snapshot_output *new_output; | |
2811 | ||
2812 | assert(session); | |
2813 | assert(output); | |
2814 | ||
2815 | DBG("Cmd snapshot add output for session %s", session->name); | |
2816 | ||
2817 | /* | |
d3f14b8a MD |
2818 | * Permission denied to create an output if the session is not |
2819 | * set in no output mode. | |
6dc3064a DG |
2820 | */ |
2821 | if (session->output_traces) { | |
2822 | ret = LTTNG_ERR_EPERM; | |
2823 | goto error; | |
2824 | } | |
2825 | ||
2826 | /* Only one output is allowed until we have the "tee" feature. */ | |
2827 | if (session->snapshot.nb_output == 1) { | |
2828 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2829 | goto error; | |
2830 | } | |
2831 | ||
2832 | new_output = snapshot_output_alloc(); | |
2833 | if (!new_output) { | |
2834 | ret = LTTNG_ERR_NOMEM; | |
2835 | goto error; | |
2836 | } | |
2837 | ||
2838 | ret = snapshot_output_init(output->max_size, output->name, | |
2839 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2840 | &session->snapshot); | |
2841 | if (ret < 0) { | |
2842 | if (ret == -ENOMEM) { | |
2843 | ret = LTTNG_ERR_NOMEM; | |
2844 | } else { | |
2845 | ret = LTTNG_ERR_INVALID; | |
2846 | } | |
2847 | goto free_error; | |
2848 | } | |
2849 | ||
6dc3064a DG |
2850 | rcu_read_lock(); |
2851 | snapshot_add_output(&session->snapshot, new_output); | |
2852 | if (id) { | |
2853 | *id = new_output->id; | |
2854 | } | |
2855 | rcu_read_unlock(); | |
2856 | ||
2857 | return LTTNG_OK; | |
2858 | ||
2859 | free_error: | |
2860 | snapshot_output_destroy(new_output); | |
2861 | error: | |
2862 | return ret; | |
2863 | } | |
2864 | ||
2865 | /* | |
2866 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2867 | * | |
2868 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2869 | */ | |
2870 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2871 | struct lttng_snapshot_output *output) | |
2872 | { | |
2873 | int ret; | |
eb240553 | 2874 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2875 | |
2876 | assert(session); | |
2877 | assert(output); | |
2878 | ||
6dc3064a DG |
2879 | rcu_read_lock(); |
2880 | ||
2881 | /* | |
d3f14b8a MD |
2882 | * Permission denied to create an output if the session is not |
2883 | * set in no output mode. | |
6dc3064a DG |
2884 | */ |
2885 | if (session->output_traces) { | |
2886 | ret = LTTNG_ERR_EPERM; | |
2887 | goto error; | |
2888 | } | |
2889 | ||
eb240553 DG |
2890 | if (output->id) { |
2891 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2892 | session->name); | |
2893 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2894 | } else if (*output->name != '\0') { | |
2895 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2896 | session->name); | |
2897 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2898 | } | |
6dc3064a DG |
2899 | if (!sout) { |
2900 | ret = LTTNG_ERR_INVALID; | |
2901 | goto error; | |
2902 | } | |
2903 | ||
2904 | snapshot_delete_output(&session->snapshot, sout); | |
2905 | snapshot_output_destroy(sout); | |
2906 | ret = LTTNG_OK; | |
2907 | ||
2908 | error: | |
2909 | rcu_read_unlock(); | |
2910 | return ret; | |
2911 | } | |
2912 | ||
2913 | /* | |
2914 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2915 | * | |
2916 | * If no output is available, outputs is untouched and 0 is returned. | |
2917 | * | |
2918 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2919 | */ | |
2920 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2921 | struct lttng_snapshot_output **outputs) | |
2922 | { | |
2923 | int ret, idx = 0; | |
b223ca94 | 2924 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
2925 | struct lttng_ht_iter iter; |
2926 | struct snapshot_output *output; | |
2927 | ||
2928 | assert(session); | |
2929 | assert(outputs); | |
2930 | ||
2931 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2932 | ||
2933 | /* | |
d3f14b8a MD |
2934 | * Permission denied to create an output if the session is not |
2935 | * set in no output mode. | |
6dc3064a DG |
2936 | */ |
2937 | if (session->output_traces) { | |
b223ca94 | 2938 | ret = -LTTNG_ERR_EPERM; |
6dc3064a DG |
2939 | goto error; |
2940 | } | |
2941 | ||
2942 | if (session->snapshot.nb_output == 0) { | |
2943 | ret = 0; | |
2944 | goto error; | |
2945 | } | |
2946 | ||
2947 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2948 | if (!list) { | |
b223ca94 | 2949 | ret = -LTTNG_ERR_NOMEM; |
6dc3064a DG |
2950 | goto error; |
2951 | } | |
2952 | ||
2953 | /* Copy list from session to the new list object. */ | |
b223ca94 | 2954 | rcu_read_lock(); |
6dc3064a DG |
2955 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
2956 | output, node.node) { | |
2957 | assert(output->consumer); | |
2958 | list[idx].id = output->id; | |
2959 | list[idx].max_size = output->max_size; | |
2960 | strncpy(list[idx].name, output->name, sizeof(list[idx].name)); | |
2961 | if (output->consumer->type == CONSUMER_DST_LOCAL) { | |
2962 | strncpy(list[idx].ctrl_url, output->consumer->dst.trace_path, | |
2963 | sizeof(list[idx].ctrl_url)); | |
2964 | } else { | |
2965 | /* Control URI. */ | |
2966 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
2967 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
2968 | if (ret < 0) { | |
b223ca94 JG |
2969 | ret = -LTTNG_ERR_NOMEM; |
2970 | goto error; | |
6dc3064a DG |
2971 | } |
2972 | ||
2973 | /* Data URI. */ | |
2974 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
2975 | list[idx].data_url, sizeof(list[idx].data_url)); | |
2976 | if (ret < 0) { | |
b223ca94 JG |
2977 | ret = -LTTNG_ERR_NOMEM; |
2978 | goto error; | |
6dc3064a DG |
2979 | } |
2980 | } | |
2981 | idx++; | |
2982 | } | |
2983 | ||
2984 | *outputs = list; | |
b223ca94 JG |
2985 | list = NULL; |
2986 | ret = session->snapshot.nb_output; | |
6dc3064a | 2987 | error: |
b223ca94 JG |
2988 | free(list); |
2989 | rcu_read_unlock(); | |
2990 | return ret; | |
6dc3064a DG |
2991 | } |
2992 | ||
2993 | /* | |
2994 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
2995 | * snapshot output is *not* set with a remote destination. | |
2996 | * | |
a934f4af | 2997 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2998 | */ |
2999 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
3000 | struct snapshot_output *snap_output, struct ltt_session *session) | |
3001 | { | |
a934f4af | 3002 | int ret = LTTNG_OK; |
6dc3064a DG |
3003 | struct lttng_ht_iter iter; |
3004 | struct consumer_socket *socket; | |
3005 | ||
3006 | assert(consumer); | |
3007 | assert(snap_output); | |
3008 | assert(session); | |
3009 | ||
3010 | DBG2("Set relayd object from snapshot output"); | |
3011 | ||
3012 | /* Ignore if snapshot consumer output is not network. */ | |
3013 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
3014 | goto error; | |
3015 | } | |
3016 | ||
3017 | /* | |
3018 | * For each consumer socket, create and send the relayd object of the | |
3019 | * snapshot output. | |
3020 | */ | |
3021 | rcu_read_lock(); | |
5eecee74 DG |
3022 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
3023 | socket, node.node) { | |
6dc3064a | 3024 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
3025 | snap_output->consumer, socket, |
3026 | session->name, session->hostname, | |
3027 | session->live_timer); | |
a934f4af | 3028 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3029 | rcu_read_unlock(); |
3030 | goto error; | |
3031 | } | |
3032 | } | |
3033 | rcu_read_unlock(); | |
3034 | ||
3035 | error: | |
3036 | return ret; | |
3037 | } | |
3038 | ||
3039 | /* | |
3040 | * Record a kernel snapshot. | |
3041 | * | |
fac41e72 | 3042 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
3043 | */ |
3044 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded | 3045 | struct snapshot_output *output, struct ltt_session *session, |
d07ceecd | 3046 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3047 | { |
3048 | int ret; | |
3049 | ||
3050 | assert(ksess); | |
3051 | assert(output); | |
3052 | assert(session); | |
3053 | ||
10a50311 JD |
3054 | /* Get the datetime for the snapshot output directory. */ |
3055 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
3056 | sizeof(output->datetime)); | |
3057 | if (!ret) { | |
a934f4af | 3058 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
3059 | goto error; |
3060 | } | |
3061 | ||
af706bb7 DG |
3062 | /* |
3063 | * Copy kernel session sockets so we can communicate with the right | |
3064 | * consumer for the snapshot record command. | |
3065 | */ | |
3066 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
3067 | if (ret < 0) { | |
a934f4af | 3068 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3069 | goto error; |
6dc3064a DG |
3070 | } |
3071 | ||
3072 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 3073 | if (ret != LTTNG_OK) { |
af706bb7 | 3074 | goto error_snapshot; |
6dc3064a DG |
3075 | } |
3076 | ||
d07ceecd | 3077 | ret = kernel_snapshot_record(ksess, output, wait, nb_packets_per_stream); |
2a06df8d | 3078 | if (ret != LTTNG_OK) { |
af706bb7 | 3079 | goto error_snapshot; |
6dc3064a DG |
3080 | } |
3081 | ||
a934f4af | 3082 | ret = LTTNG_OK; |
1371fc12 | 3083 | goto end; |
a934f4af | 3084 | |
af706bb7 DG |
3085 | error_snapshot: |
3086 | /* Clean up copied sockets so this output can use some other later on. */ | |
3087 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a | 3088 | error: |
1371fc12 | 3089 | end: |
6dc3064a DG |
3090 | return ret; |
3091 | } | |
3092 | ||
3093 | /* | |
3094 | * Record a UST snapshot. | |
3095 | * | |
a934f4af | 3096 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
3097 | */ |
3098 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 3099 | struct snapshot_output *output, struct ltt_session *session, |
d07ceecd | 3100 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3101 | { |
3102 | int ret; | |
3103 | ||
3104 | assert(usess); | |
3105 | assert(output); | |
3106 | assert(session); | |
3107 | ||
10a50311 JD |
3108 | /* Get the datetime for the snapshot output directory. */ |
3109 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
3110 | sizeof(output->datetime)); | |
3111 | if (!ret) { | |
a934f4af | 3112 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
3113 | goto error; |
3114 | } | |
3115 | ||
af706bb7 | 3116 | /* |
d3f14b8a | 3117 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
3118 | * consumer for the snapshot record command. |
3119 | */ | |
3120 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
3121 | if (ret < 0) { | |
a934f4af | 3122 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3123 | goto error; |
6dc3064a DG |
3124 | } |
3125 | ||
3126 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 3127 | if (ret != LTTNG_OK) { |
af706bb7 | 3128 | goto error_snapshot; |
6dc3064a DG |
3129 | } |
3130 | ||
d07ceecd | 3131 | ret = ust_app_snapshot_record(usess, output, wait, nb_packets_per_stream); |
6dc3064a | 3132 | if (ret < 0) { |
7badf927 DG |
3133 | switch (-ret) { |
3134 | case EINVAL: | |
a934f4af | 3135 | ret = LTTNG_ERR_INVALID; |
7badf927 DG |
3136 | break; |
3137 | case ENODATA: | |
3138 | ret = LTTNG_ERR_SNAPSHOT_NODATA; | |
3139 | break; | |
3140 | default: | |
3141 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
3142 | break; | |
5c786ded | 3143 | } |
af706bb7 | 3144 | goto error_snapshot; |
6dc3064a DG |
3145 | } |
3146 | ||
a934f4af DG |
3147 | ret = LTTNG_OK; |
3148 | ||
af706bb7 DG |
3149 | error_snapshot: |
3150 | /* Clean up copied sockets so this output can use some other later on. */ | |
3151 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
3152 | error: |
3153 | return ret; | |
3154 | } | |
3155 | ||
d07ceecd MD |
3156 | static |
3157 | uint64_t get_session_size_one_more_packet_per_stream(struct ltt_session *session, | |
3158 | uint64_t cur_nr_packets) | |
68808f4e | 3159 | { |
d07ceecd | 3160 | uint64_t tot_size = 0; |
68808f4e DG |
3161 | |
3162 | if (session->kernel_session) { | |
3163 | struct ltt_kernel_channel *chan; | |
3164 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3165 | ||
68808f4e | 3166 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
3167 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
3168 | /* | |
3169 | * Don't take channel into account if we | |
3170 | * already grab all its packets. | |
3171 | */ | |
3172 | continue; | |
68808f4e | 3173 | } |
d07ceecd MD |
3174 | tot_size += chan->channel->attr.subbuf_size |
3175 | * chan->stream_count; | |
68808f4e DG |
3176 | } |
3177 | } | |
3178 | ||
3179 | if (session->ust_session) { | |
68808f4e DG |
3180 | struct ltt_ust_session *usess = session->ust_session; |
3181 | ||
d07ceecd MD |
3182 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
3183 | cur_nr_packets); | |
68808f4e DG |
3184 | } |
3185 | ||
d07ceecd | 3186 | return tot_size; |
68808f4e DG |
3187 | } |
3188 | ||
5c786ded | 3189 | /* |
d07ceecd MD |
3190 | * Calculate the number of packets we can grab from each stream that |
3191 | * fits within the overall snapshot max size. | |
3192 | * | |
3193 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
3194 | * the number of packets per stream. | |
3195 | * | |
3196 | * TODO: this approach is not perfect: we consider the worse case | |
3197 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
3198 | * better if we do this calculation while we actually grab the packet | |
3199 | * content: we would know how much padding we don't actually store into | |
3200 | * the file. | |
3201 | * | |
3202 | * This algorithm is currently bounded by the number of packets per | |
3203 | * stream. | |
3204 | * | |
3205 | * Since we call this algorithm before actually grabbing the data, it's | |
3206 | * an approximation: for instance, applications could appear/disappear | |
3207 | * in between this call and actually grabbing data. | |
5c786ded | 3208 | */ |
d07ceecd MD |
3209 | static |
3210 | int64_t get_session_nb_packets_per_stream(struct ltt_session *session, uint64_t max_size) | |
5c786ded | 3211 | { |
d07ceecd MD |
3212 | int64_t size_left; |
3213 | uint64_t cur_nb_packets = 0; | |
5c786ded | 3214 | |
d07ceecd MD |
3215 | if (!max_size) { |
3216 | return 0; /* Infinite */ | |
5c786ded JD |
3217 | } |
3218 | ||
d07ceecd MD |
3219 | size_left = max_size; |
3220 | for (;;) { | |
3221 | uint64_t one_more_packet_tot_size; | |
5c786ded | 3222 | |
d07ceecd MD |
3223 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream(session, |
3224 | cur_nb_packets); | |
3225 | if (!one_more_packet_tot_size) { | |
3226 | /* We are already grabbing all packets. */ | |
3227 | break; | |
3228 | } | |
3229 | size_left -= one_more_packet_tot_size; | |
3230 | if (size_left < 0) { | |
3231 | break; | |
3232 | } | |
3233 | cur_nb_packets++; | |
5c786ded | 3234 | } |
d07ceecd MD |
3235 | if (!cur_nb_packets) { |
3236 | /* Not enough room to grab one packet of each stream, error. */ | |
3237 | return -1; | |
3238 | } | |
3239 | return cur_nb_packets; | |
5c786ded JD |
3240 | } |
3241 | ||
6dc3064a DG |
3242 | /* |
3243 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3244 | * | |
3245 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3246 | * complete before returning. | |
3247 | * | |
3248 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3249 | */ | |
3250 | int cmd_snapshot_record(struct ltt_session *session, | |
3251 | struct lttng_snapshot_output *output, int wait) | |
3252 | { | |
3253 | int ret = LTTNG_OK; | |
e1986656 DG |
3254 | unsigned int use_tmp_output = 0; |
3255 | struct snapshot_output tmp_output; | |
00e1dfc4 | 3256 | unsigned int snapshot_success = 0; |
6dc3064a DG |
3257 | |
3258 | assert(session); | |
ba45d9f0 | 3259 | assert(output); |
6dc3064a DG |
3260 | |
3261 | DBG("Cmd snapshot record for session %s", session->name); | |
3262 | ||
3263 | /* | |
d3f14b8a MD |
3264 | * Permission denied to create an output if the session is not |
3265 | * set in no output mode. | |
6dc3064a DG |
3266 | */ |
3267 | if (session->output_traces) { | |
3268 | ret = LTTNG_ERR_EPERM; | |
3269 | goto error; | |
3270 | } | |
3271 | ||
3272 | /* The session needs to be started at least once. */ | |
8382cf6f | 3273 | if (!session->has_been_started) { |
6dc3064a DG |
3274 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3275 | goto error; | |
3276 | } | |
3277 | ||
3278 | /* Use temporary output for the session. */ | |
ba45d9f0 | 3279 | if (*output->ctrl_url != '\0') { |
6dc3064a DG |
3280 | ret = snapshot_output_init(output->max_size, output->name, |
3281 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3282 | &tmp_output, NULL); |
6dc3064a DG |
3283 | if (ret < 0) { |
3284 | if (ret == -ENOMEM) { | |
3285 | ret = LTTNG_ERR_NOMEM; | |
3286 | } else { | |
3287 | ret = LTTNG_ERR_INVALID; | |
3288 | } | |
3289 | goto error; | |
3290 | } | |
1bfe7328 DG |
3291 | /* Use the global session count for the temporary snapshot. */ |
3292 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
e1986656 | 3293 | use_tmp_output = 1; |
6dc3064a DG |
3294 | } |
3295 | ||
3296 | if (session->kernel_session) { | |
3297 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3298 | ||
e1986656 | 3299 | if (use_tmp_output) { |
d07ceecd MD |
3300 | int64_t nb_packets_per_stream; |
3301 | ||
3302 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
3303 | tmp_output.max_size); | |
3304 | if (nb_packets_per_stream < 0) { | |
3305 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3306 | goto error; | |
3307 | } | |
e1986656 | 3308 | ret = record_kernel_snapshot(ksess, &tmp_output, session, |
d07ceecd | 3309 | wait, nb_packets_per_stream); |
a934f4af | 3310 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3311 | goto error; |
3312 | } | |
1bfe7328 | 3313 | snapshot_success = 1; |
6dc3064a DG |
3314 | } else { |
3315 | struct snapshot_output *sout; | |
3316 | struct lttng_ht_iter iter; | |
3317 | ||
3318 | rcu_read_lock(); | |
3319 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3320 | &iter.iter, sout, node.node) { | |
d07ceecd MD |
3321 | int64_t nb_packets_per_stream; |
3322 | ||
e1986656 DG |
3323 | /* |
3324 | * Make a local copy of the output and assign the possible | |
3325 | * temporary value given by the caller. | |
3326 | */ | |
3327 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3328 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3329 | ||
e1986656 DG |
3330 | if (output->max_size != (uint64_t) -1ULL) { |
3331 | tmp_output.max_size = output->max_size; | |
3332 | } | |
3333 | ||
d07ceecd MD |
3334 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, |
3335 | tmp_output.max_size); | |
3336 | if (nb_packets_per_stream < 0) { | |
68808f4e DG |
3337 | ret = LTTNG_ERR_MAX_SIZE_INVALID; |
3338 | goto error; | |
3339 | } | |
3340 | ||
e1986656 DG |
3341 | /* Use temporary name. */ |
3342 | if (*output->name != '\0') { | |
3343 | strncpy(tmp_output.name, output->name, | |
3344 | sizeof(tmp_output.name)); | |
3345 | } | |
3346 | ||
1bfe7328 DG |
3347 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3348 | ||
e1986656 | 3349 | ret = record_kernel_snapshot(ksess, &tmp_output, |
d07ceecd | 3350 | session, wait, nb_packets_per_stream); |
a934f4af | 3351 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3352 | rcu_read_unlock(); |
3353 | goto error; | |
3354 | } | |
1bfe7328 | 3355 | snapshot_success = 1; |
6dc3064a DG |
3356 | } |
3357 | rcu_read_unlock(); | |
3358 | } | |
3359 | } | |
3360 | ||
3361 | if (session->ust_session) { | |
3362 | struct ltt_ust_session *usess = session->ust_session; | |
3363 | ||
e1986656 | 3364 | if (use_tmp_output) { |
d07ceecd MD |
3365 | int64_t nb_packets_per_stream; |
3366 | ||
3367 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
3368 | tmp_output.max_size); | |
3369 | if (nb_packets_per_stream < 0) { | |
3370 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3371 | goto error; | |
3372 | } | |
e1986656 | 3373 | ret = record_ust_snapshot(usess, &tmp_output, session, |
d07ceecd | 3374 | wait, nb_packets_per_stream); |
a934f4af | 3375 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3376 | goto error; |
3377 | } | |
1bfe7328 | 3378 | snapshot_success = 1; |
6dc3064a DG |
3379 | } else { |
3380 | struct snapshot_output *sout; | |
3381 | struct lttng_ht_iter iter; | |
3382 | ||
3383 | rcu_read_lock(); | |
3384 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3385 | &iter.iter, sout, node.node) { | |
d07ceecd MD |
3386 | int64_t nb_packets_per_stream; |
3387 | ||
e1986656 DG |
3388 | /* |
3389 | * Make a local copy of the output and assign the possible | |
3390 | * temporary value given by the caller. | |
3391 | */ | |
3392 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3393 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3394 | ||
e1986656 DG |
3395 | if (output->max_size != (uint64_t) -1ULL) { |
3396 | tmp_output.max_size = output->max_size; | |
3397 | } | |
3398 | ||
d07ceecd MD |
3399 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, |
3400 | tmp_output.max_size); | |
3401 | if (nb_packets_per_stream < 0) { | |
68808f4e | 3402 | ret = LTTNG_ERR_MAX_SIZE_INVALID; |
d07ceecd | 3403 | rcu_read_unlock(); |
68808f4e DG |
3404 | goto error; |
3405 | } | |
3406 | ||
e1986656 DG |
3407 | /* Use temporary name. */ |
3408 | if (*output->name != '\0') { | |
3409 | strncpy(tmp_output.name, output->name, | |
3410 | sizeof(tmp_output.name)); | |
3411 | } | |
3412 | ||
1bfe7328 DG |
3413 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3414 | ||
e1986656 | 3415 | ret = record_ust_snapshot(usess, &tmp_output, session, |
d07ceecd | 3416 | wait, nb_packets_per_stream); |
a934f4af | 3417 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3418 | rcu_read_unlock(); |
3419 | goto error; | |
3420 | } | |
1bfe7328 | 3421 | snapshot_success = 1; |
6dc3064a DG |
3422 | } |
3423 | rcu_read_unlock(); | |
3424 | } | |
3425 | } | |
3426 | ||
1bfe7328 DG |
3427 | if (snapshot_success) { |
3428 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3429 | } else { |
3430 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3431 | } |
3432 | ||
6dc3064a | 3433 | error: |
6dc3064a DG |
3434 | return ret; |
3435 | } | |
3436 | ||
d7ba1388 MD |
3437 | /* |
3438 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
3439 | */ | |
3440 | int cmd_set_session_shm_path(struct ltt_session *session, | |
3441 | const char *shm_path) | |
3442 | { | |
3443 | /* Safety net */ | |
3444 | assert(session); | |
3445 | ||
3446 | /* | |
3447 | * Can only set shm path before session is started. | |
3448 | */ | |
3449 | if (session->has_been_started) { | |
3450 | return LTTNG_ERR_SESSION_STARTED; | |
3451 | } | |
3452 | ||
3453 | strncpy(session->shm_path, shm_path, | |
3454 | sizeof(session->shm_path)); | |
3455 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
3456 | ||
3457 | return 0; | |
3458 | } | |
3459 | ||
2f77fc4b DG |
3460 | /* |
3461 | * Init command subsystem. | |
3462 | */ | |
3463 | void cmd_init(void) | |
3464 | { | |
3465 | /* | |
d88aee68 DG |
3466 | * Set network sequence index to 1 for streams to match a relayd |
3467 | * socket on the consumer side. | |
2f77fc4b | 3468 | */ |
d88aee68 DG |
3469 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3470 | relayd_net_seq_idx = 1; | |
3471 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3472 | |
3473 | DBG("Command subsystem initialized"); | |
3474 | } |