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 | 52 | |
18a720cd MD |
53 | /* |
54 | * Both functions below are special case for the Kernel domain when | |
55 | * enabling/disabling all events. | |
56 | */ | |
57 | static | |
58 | int enable_kevent_all(struct ltt_session *session, | |
59 | struct lttng_domain *domain, char *channel_name, | |
60 | struct lttng_event *event, | |
61 | char *filter_expression, | |
62 | struct lttng_filter_bytecode *filter, int wpipe); | |
63 | static | |
64 | int disable_kevent_all(struct ltt_session *session, int domain, | |
65 | char *channel_name, | |
66 | struct lttng_event *event); | |
67 | ||
2f77fc4b DG |
68 | /* |
69 | * Create a session path used by list_lttng_sessions for the case that the | |
70 | * session consumer is on the network. | |
71 | */ | |
72 | static int build_network_session_path(char *dst, size_t size, | |
73 | struct ltt_session *session) | |
74 | { | |
75 | int ret, kdata_port, udata_port; | |
76 | struct lttng_uri *kuri = NULL, *uuri = NULL, *uri = NULL; | |
77 | char tmp_uurl[PATH_MAX], tmp_urls[PATH_MAX]; | |
78 | ||
79 | assert(session); | |
80 | assert(dst); | |
81 | ||
82 | memset(tmp_urls, 0, sizeof(tmp_urls)); | |
83 | memset(tmp_uurl, 0, sizeof(tmp_uurl)); | |
84 | ||
85 | kdata_port = udata_port = DEFAULT_NETWORK_DATA_PORT; | |
86 | ||
87 | if (session->kernel_session && session->kernel_session->consumer) { | |
88 | kuri = &session->kernel_session->consumer->dst.net.control; | |
89 | kdata_port = session->kernel_session->consumer->dst.net.data.port; | |
90 | } | |
91 | ||
92 | if (session->ust_session && session->ust_session->consumer) { | |
93 | uuri = &session->ust_session->consumer->dst.net.control; | |
94 | udata_port = session->ust_session->consumer->dst.net.data.port; | |
95 | } | |
96 | ||
97 | if (uuri == NULL && kuri == NULL) { | |
98 | uri = &session->consumer->dst.net.control; | |
99 | kdata_port = session->consumer->dst.net.data.port; | |
100 | } else if (kuri && uuri) { | |
101 | ret = uri_compare(kuri, uuri); | |
102 | if (ret) { | |
103 | /* Not Equal */ | |
104 | uri = kuri; | |
105 | /* Build uuri URL string */ | |
106 | ret = uri_to_str_url(uuri, tmp_uurl, sizeof(tmp_uurl)); | |
107 | if (ret < 0) { | |
108 | goto error; | |
109 | } | |
110 | } else { | |
111 | uri = kuri; | |
112 | } | |
113 | } else if (kuri && uuri == NULL) { | |
114 | uri = kuri; | |
115 | } else if (uuri && kuri == NULL) { | |
116 | uri = uuri; | |
117 | } | |
118 | ||
119 | ret = uri_to_str_url(uri, tmp_urls, sizeof(tmp_urls)); | |
120 | if (ret < 0) { | |
121 | goto error; | |
122 | } | |
123 | ||
9aa9f900 DG |
124 | /* |
125 | * Do we have a UST url set. If yes, this means we have both kernel and UST | |
126 | * to print. | |
127 | */ | |
9d035200 | 128 | if (*tmp_uurl != '\0') { |
2f77fc4b DG |
129 | ret = snprintf(dst, size, "[K]: %s [data: %d] -- [U]: %s [data: %d]", |
130 | tmp_urls, kdata_port, tmp_uurl, udata_port); | |
131 | } else { | |
9aa9f900 | 132 | int dport; |
bef08707 | 133 | if (kuri || (!kuri && !uuri)) { |
9aa9f900 DG |
134 | dport = kdata_port; |
135 | } else { | |
136 | /* No kernel URI, use the UST port. */ | |
137 | dport = udata_port; | |
138 | } | |
139 | ret = snprintf(dst, size, "%s [data: %d]", tmp_urls, dport); | |
2f77fc4b DG |
140 | } |
141 | ||
142 | error: | |
143 | return ret; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Fill lttng_channel array of all channels. | |
148 | */ | |
149 | static void list_lttng_channels(int domain, struct ltt_session *session, | |
150 | struct lttng_channel *channels) | |
151 | { | |
152 | int i = 0; | |
153 | struct ltt_kernel_channel *kchan; | |
154 | ||
155 | DBG("Listing channels for session %s", session->name); | |
156 | ||
157 | switch (domain) { | |
158 | case LTTNG_DOMAIN_KERNEL: | |
159 | /* Kernel channels */ | |
160 | if (session->kernel_session != NULL) { | |
161 | cds_list_for_each_entry(kchan, | |
162 | &session->kernel_session->channel_list.head, list) { | |
163 | /* Copy lttng_channel struct to array */ | |
164 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
165 | channels[i].enabled = kchan->enabled; | |
166 | i++; | |
167 | } | |
168 | } | |
169 | break; | |
170 | case LTTNG_DOMAIN_UST: | |
171 | { | |
172 | struct lttng_ht_iter iter; | |
173 | struct ltt_ust_channel *uchan; | |
174 | ||
e7fe706f | 175 | rcu_read_lock(); |
2f77fc4b DG |
176 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
177 | &iter.iter, uchan, node.node) { | |
178 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); | |
179 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
180 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
181 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
182 | channels[i].attr.switch_timer_interval = | |
183 | uchan->attr.switch_timer_interval; | |
184 | channels[i].attr.read_timer_interval = | |
185 | uchan->attr.read_timer_interval; | |
186 | channels[i].enabled = uchan->enabled; | |
2f785fe7 DG |
187 | channels[i].attr.tracefile_size = uchan->tracefile_size; |
188 | channels[i].attr.tracefile_count = uchan->tracefile_count; | |
2f77fc4b DG |
189 | switch (uchan->attr.output) { |
190 | case LTTNG_UST_MMAP: | |
191 | default: | |
192 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
193 | break; | |
194 | } | |
195 | i++; | |
196 | } | |
e7fe706f | 197 | rcu_read_unlock(); |
2f77fc4b DG |
198 | break; |
199 | } | |
200 | default: | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
3c6a091f | 205 | /* |
022d91ba | 206 | * Create a list of agent domain events. |
3c6a091f DG |
207 | * |
208 | * Return number of events in list on success or else a negative value. | |
209 | */ | |
022d91ba | 210 | static int list_lttng_agent_events(struct agent *agt, |
3c6a091f DG |
211 | struct lttng_event **events) |
212 | { | |
213 | int i = 0, ret = 0; | |
214 | unsigned int nb_event = 0; | |
022d91ba | 215 | struct agent_event *event; |
3c6a091f DG |
216 | struct lttng_event *tmp_events; |
217 | struct lttng_ht_iter iter; | |
218 | ||
022d91ba | 219 | assert(agt); |
3c6a091f DG |
220 | assert(events); |
221 | ||
022d91ba | 222 | DBG3("Listing agent events"); |
3c6a091f | 223 | |
e5bbf678 | 224 | rcu_read_lock(); |
022d91ba | 225 | nb_event = lttng_ht_get_count(agt->events); |
e5bbf678 | 226 | rcu_read_unlock(); |
3c6a091f DG |
227 | if (nb_event == 0) { |
228 | ret = nb_event; | |
229 | goto error; | |
230 | } | |
231 | ||
232 | tmp_events = zmalloc(nb_event * sizeof(*tmp_events)); | |
233 | if (!tmp_events) { | |
022d91ba | 234 | PERROR("zmalloc agent events session"); |
3c6a091f DG |
235 | ret = -LTTNG_ERR_FATAL; |
236 | goto error; | |
237 | } | |
238 | ||
239 | rcu_read_lock(); | |
022d91ba | 240 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
3c6a091f DG |
241 | strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name)); |
242 | tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0'; | |
243 | tmp_events[i].enabled = event->enabled; | |
ff94328f DG |
244 | tmp_events[i].loglevel = event->loglevel; |
245 | tmp_events[i].loglevel_type = event->loglevel_type; | |
3c6a091f DG |
246 | i++; |
247 | } | |
248 | rcu_read_unlock(); | |
249 | ||
250 | *events = tmp_events; | |
251 | ret = nb_event; | |
252 | ||
253 | error: | |
254 | assert(nb_event == i); | |
255 | return ret; | |
256 | } | |
257 | ||
2f77fc4b DG |
258 | /* |
259 | * Create a list of ust global domain events. | |
260 | */ | |
261 | static int list_lttng_ust_global_events(char *channel_name, | |
262 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
263 | { | |
264 | int i = 0, ret = 0; | |
265 | unsigned int nb_event = 0; | |
266 | struct lttng_ht_iter iter; | |
267 | struct lttng_ht_node_str *node; | |
268 | struct ltt_ust_channel *uchan; | |
269 | struct ltt_ust_event *uevent; | |
270 | struct lttng_event *tmp; | |
271 | ||
272 | DBG("Listing UST global events for channel %s", channel_name); | |
273 | ||
274 | rcu_read_lock(); | |
275 | ||
276 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); | |
277 | node = lttng_ht_iter_get_node_str(&iter); | |
278 | if (node == NULL) { | |
f73fabfd | 279 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
280 | goto error; |
281 | } | |
282 | ||
283 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); | |
284 | ||
285 | nb_event += lttng_ht_get_count(uchan->events); | |
286 | ||
287 | if (nb_event == 0) { | |
288 | ret = nb_event; | |
289 | goto error; | |
290 | } | |
291 | ||
292 | DBG3("Listing UST global %d events", nb_event); | |
293 | ||
294 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
295 | if (tmp == NULL) { | |
f73fabfd | 296 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
297 | goto error; |
298 | } | |
299 | ||
300 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { | |
301 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); | |
302 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
303 | tmp[i].enabled = uevent->enabled; | |
304 | ||
305 | switch (uevent->attr.instrumentation) { | |
306 | case LTTNG_UST_TRACEPOINT: | |
307 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
308 | break; | |
309 | case LTTNG_UST_PROBE: | |
310 | tmp[i].type = LTTNG_EVENT_PROBE; | |
311 | break; | |
312 | case LTTNG_UST_FUNCTION: | |
313 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
314 | break; | |
315 | } | |
316 | ||
317 | tmp[i].loglevel = uevent->attr.loglevel; | |
318 | switch (uevent->attr.loglevel_type) { | |
319 | case LTTNG_UST_LOGLEVEL_ALL: | |
320 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
321 | break; | |
322 | case LTTNG_UST_LOGLEVEL_RANGE: | |
323 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
324 | break; | |
325 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
326 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
327 | break; | |
328 | } | |
329 | if (uevent->filter) { | |
330 | tmp[i].filter = 1; | |
331 | } | |
4634f12e JI |
332 | if (uevent->exclusion) { |
333 | tmp[i].exclusion = 1; | |
334 | } | |
2f77fc4b DG |
335 | i++; |
336 | } | |
337 | ||
338 | ret = nb_event; | |
339 | *events = tmp; | |
340 | ||
341 | error: | |
342 | rcu_read_unlock(); | |
343 | return ret; | |
344 | } | |
345 | ||
346 | /* | |
347 | * Fill lttng_event array of all kernel events in the channel. | |
348 | */ | |
349 | static int list_lttng_kernel_events(char *channel_name, | |
350 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
351 | { | |
352 | int i = 0, ret; | |
353 | unsigned int nb_event; | |
354 | struct ltt_kernel_event *event; | |
355 | struct ltt_kernel_channel *kchan; | |
356 | ||
357 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
358 | if (kchan == NULL) { | |
f73fabfd | 359 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
360 | goto error; |
361 | } | |
362 | ||
363 | nb_event = kchan->event_count; | |
364 | ||
365 | DBG("Listing events for channel %s", kchan->channel->name); | |
366 | ||
367 | if (nb_event == 0) { | |
834978fd DG |
368 | *events = NULL; |
369 | goto syscall; | |
2f77fc4b DG |
370 | } |
371 | ||
372 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
373 | if (*events == NULL) { | |
f73fabfd | 374 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
375 | goto error; |
376 | } | |
377 | ||
378 | /* Kernel channels */ | |
379 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
380 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
381 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
382 | (*events)[i].enabled = event->enabled; | |
383 | ||
384 | switch (event->event->instrumentation) { | |
385 | case LTTNG_KERNEL_TRACEPOINT: | |
386 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; | |
387 | break; | |
2f77fc4b | 388 | case LTTNG_KERNEL_KRETPROBE: |
1896972b DG |
389 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
390 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
391 | sizeof(struct lttng_kernel_kprobe)); | |
392 | break; | |
393 | case LTTNG_KERNEL_KPROBE: | |
2f77fc4b DG |
394 | (*events)[i].type = LTTNG_EVENT_PROBE; |
395 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
396 | sizeof(struct lttng_kernel_kprobe)); | |
397 | break; | |
398 | case LTTNG_KERNEL_FUNCTION: | |
399 | (*events)[i].type = LTTNG_EVENT_FUNCTION; | |
400 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
401 | sizeof(struct lttng_kernel_function)); | |
402 | break; | |
403 | case LTTNG_KERNEL_NOOP: | |
404 | (*events)[i].type = LTTNG_EVENT_NOOP; | |
405 | break; | |
406 | case LTTNG_KERNEL_SYSCALL: | |
407 | (*events)[i].type = LTTNG_EVENT_SYSCALL; | |
408 | break; | |
409 | case LTTNG_KERNEL_ALL: | |
410 | assert(0); | |
411 | break; | |
412 | } | |
413 | i++; | |
414 | } | |
415 | ||
834978fd DG |
416 | syscall: |
417 | if (syscall_table) { | |
418 | ssize_t new_size; | |
419 | ||
420 | new_size = syscall_list_channel(kchan, events, nb_event); | |
421 | if (new_size < 0) { | |
422 | free(events); | |
423 | ret = -new_size; | |
424 | goto error; | |
425 | } | |
426 | nb_event = new_size; | |
427 | } | |
428 | ||
2f77fc4b DG |
429 | return nb_event; |
430 | ||
431 | error: | |
f73fabfd DG |
432 | /* Negate the error code to differentiate the size from an error */ |
433 | return -ret; | |
2f77fc4b DG |
434 | } |
435 | ||
436 | /* | |
437 | * Add URI so the consumer output object. Set the correct path depending on the | |
438 | * domain adding the default trace directory. | |
439 | */ | |
440 | static int add_uri_to_consumer(struct consumer_output *consumer, | |
441 | struct lttng_uri *uri, int domain, const char *session_name) | |
442 | { | |
f73fabfd | 443 | int ret = LTTNG_OK; |
2f77fc4b DG |
444 | const char *default_trace_dir; |
445 | ||
446 | assert(uri); | |
447 | ||
448 | if (consumer == NULL) { | |
449 | DBG("No consumer detected. Don't add URI. Stopping."); | |
f73fabfd | 450 | ret = LTTNG_ERR_NO_CONSUMER; |
2f77fc4b DG |
451 | goto error; |
452 | } | |
453 | ||
454 | switch (domain) { | |
455 | case LTTNG_DOMAIN_KERNEL: | |
456 | default_trace_dir = DEFAULT_KERNEL_TRACE_DIR; | |
457 | break; | |
458 | case LTTNG_DOMAIN_UST: | |
459 | default_trace_dir = DEFAULT_UST_TRACE_DIR; | |
460 | break; | |
461 | default: | |
462 | /* | |
463 | * This case is possible is we try to add the URI to the global tracing | |
464 | * session consumer object which in this case there is no subdir. | |
465 | */ | |
466 | default_trace_dir = ""; | |
467 | } | |
468 | ||
469 | switch (uri->dtype) { | |
470 | case LTTNG_DST_IPV4: | |
471 | case LTTNG_DST_IPV6: | |
472 | DBG2("Setting network URI to consumer"); | |
473 | ||
df75acac DG |
474 | if (consumer->type == CONSUMER_DST_NET) { |
475 | if ((uri->stype == LTTNG_STREAM_CONTROL && | |
785d2d0d DG |
476 | consumer->dst.net.control_isset) || |
477 | (uri->stype == LTTNG_STREAM_DATA && | |
478 | consumer->dst.net.data_isset)) { | |
df75acac DG |
479 | ret = LTTNG_ERR_URL_EXIST; |
480 | goto error; | |
481 | } | |
482 | } else { | |
483 | memset(&consumer->dst.net, 0, sizeof(consumer->dst.net)); | |
785d2d0d DG |
484 | } |
485 | ||
df75acac DG |
486 | consumer->type = CONSUMER_DST_NET; |
487 | ||
2f77fc4b DG |
488 | /* Set URI into consumer output object */ |
489 | ret = consumer_set_network_uri(consumer, uri); | |
490 | if (ret < 0) { | |
a74934ba | 491 | ret = -ret; |
2f77fc4b DG |
492 | goto error; |
493 | } else if (ret == 1) { | |
494 | /* | |
495 | * URI was the same in the consumer so we do not append the subdir | |
496 | * again so to not duplicate output dir. | |
497 | */ | |
f86c9f4e | 498 | ret = LTTNG_OK; |
2f77fc4b DG |
499 | goto error; |
500 | } | |
501 | ||
502 | if (uri->stype == LTTNG_STREAM_CONTROL && strlen(uri->subdir) == 0) { | |
503 | ret = consumer_set_subdir(consumer, session_name); | |
504 | if (ret < 0) { | |
f73fabfd | 505 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
506 | goto error; |
507 | } | |
508 | } | |
509 | ||
510 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
511 | /* On a new subdir, reappend the default trace dir. */ | |
c30ce0b3 CB |
512 | strncat(consumer->subdir, default_trace_dir, |
513 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
514 | DBG3("Append domain trace name to subdir %s", consumer->subdir); |
515 | } | |
516 | ||
517 | break; | |
518 | case LTTNG_DST_PATH: | |
519 | DBG2("Setting trace directory path from URI to %s", uri->dst.path); | |
520 | memset(consumer->dst.trace_path, 0, | |
521 | sizeof(consumer->dst.trace_path)); | |
522 | strncpy(consumer->dst.trace_path, uri->dst.path, | |
523 | sizeof(consumer->dst.trace_path)); | |
524 | /* Append default trace dir */ | |
525 | strncat(consumer->dst.trace_path, default_trace_dir, | |
c30ce0b3 CB |
526 | sizeof(consumer->dst.trace_path) - |
527 | strlen(consumer->dst.trace_path) - 1); | |
2f77fc4b DG |
528 | /* Flag consumer as local. */ |
529 | consumer->type = CONSUMER_DST_LOCAL; | |
530 | break; | |
531 | } | |
532 | ||
a74934ba DG |
533 | ret = LTTNG_OK; |
534 | ||
2f77fc4b DG |
535 | error: |
536 | return ret; | |
537 | } | |
538 | ||
539 | /* | |
540 | * Init tracing by creating trace directory and sending fds kernel consumer. | |
541 | */ | |
542 | static int init_kernel_tracing(struct ltt_kernel_session *session) | |
543 | { | |
544 | int ret = 0; | |
545 | struct lttng_ht_iter iter; | |
546 | struct consumer_socket *socket; | |
547 | ||
548 | assert(session); | |
549 | ||
e7fe706f DG |
550 | rcu_read_lock(); |
551 | ||
2f77fc4b DG |
552 | if (session->consumer_fds_sent == 0 && session->consumer != NULL) { |
553 | cds_lfht_for_each_entry(session->consumer->socks->ht, &iter.iter, | |
554 | socket, node.node) { | |
2f77fc4b | 555 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 556 | ret = kernel_consumer_send_session(socket, session); |
2f77fc4b DG |
557 | pthread_mutex_unlock(socket->lock); |
558 | if (ret < 0) { | |
f73fabfd | 559 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
560 | goto error; |
561 | } | |
562 | } | |
563 | } | |
564 | ||
565 | error: | |
e7fe706f | 566 | rcu_read_unlock(); |
2f77fc4b DG |
567 | return ret; |
568 | } | |
569 | ||
570 | /* | |
571 | * Create a socket to the relayd using the URI. | |
572 | * | |
573 | * On success, the relayd_sock pointer is set to the created socket. | |
574 | * Else, it's stays untouched and a lttcomm error code is returned. | |
575 | */ | |
6151a90f JD |
576 | static int create_connect_relayd(struct lttng_uri *uri, |
577 | struct lttcomm_relayd_sock **relayd_sock) | |
2f77fc4b DG |
578 | { |
579 | int ret; | |
6151a90f | 580 | struct lttcomm_relayd_sock *rsock; |
2f77fc4b | 581 | |
6151a90f JD |
582 | rsock = lttcomm_alloc_relayd_sock(uri, RELAYD_VERSION_COMM_MAJOR, |
583 | RELAYD_VERSION_COMM_MINOR); | |
584 | if (!rsock) { | |
f73fabfd | 585 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
586 | goto error; |
587 | } | |
588 | ||
ffe60014 DG |
589 | /* |
590 | * Connect to relayd so we can proceed with a session creation. This call | |
591 | * can possibly block for an arbitrary amount of time to set the health | |
592 | * state to be in poll execution. | |
593 | */ | |
594 | health_poll_entry(); | |
6151a90f | 595 | ret = relayd_connect(rsock); |
ffe60014 | 596 | health_poll_exit(); |
2f77fc4b DG |
597 | if (ret < 0) { |
598 | ERR("Unable to reach lttng-relayd"); | |
f73fabfd | 599 | ret = LTTNG_ERR_RELAYD_CONNECT_FAIL; |
2f77fc4b DG |
600 | goto free_sock; |
601 | } | |
602 | ||
603 | /* Create socket for control stream. */ | |
604 | if (uri->stype == LTTNG_STREAM_CONTROL) { | |
605 | DBG3("Creating relayd stream socket from URI"); | |
606 | ||
607 | /* Check relayd version */ | |
6151a90f | 608 | ret = relayd_version_check(rsock); |
2f77fc4b | 609 | if (ret < 0) { |
f73fabfd | 610 | ret = LTTNG_ERR_RELAYD_VERSION_FAIL; |
2f77fc4b DG |
611 | goto close_sock; |
612 | } | |
613 | } else if (uri->stype == LTTNG_STREAM_DATA) { | |
614 | DBG3("Creating relayd data socket from URI"); | |
615 | } else { | |
616 | /* Command is not valid */ | |
617 | ERR("Relayd invalid stream type: %d", uri->stype); | |
f73fabfd | 618 | ret = LTTNG_ERR_INVALID; |
2f77fc4b DG |
619 | goto close_sock; |
620 | } | |
621 | ||
6151a90f | 622 | *relayd_sock = rsock; |
2f77fc4b | 623 | |
f73fabfd | 624 | return LTTNG_OK; |
2f77fc4b DG |
625 | |
626 | close_sock: | |
6151a90f JD |
627 | /* The returned value is not useful since we are on an error path. */ |
628 | (void) relayd_close(rsock); | |
2f77fc4b | 629 | free_sock: |
6151a90f | 630 | free(rsock); |
2f77fc4b DG |
631 | error: |
632 | return ret; | |
633 | } | |
634 | ||
635 | /* | |
636 | * Connect to the relayd using URI and send the socket to the right consumer. | |
637 | */ | |
6dc3064a | 638 | static int send_consumer_relayd_socket(int domain, unsigned int session_id, |
2f77fc4b | 639 | struct lttng_uri *relayd_uri, struct consumer_output *consumer, |
d3e2ba59 JD |
640 | struct consumer_socket *consumer_sock, |
641 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b DG |
642 | { |
643 | int ret; | |
6151a90f | 644 | struct lttcomm_relayd_sock *rsock = NULL; |
2f77fc4b | 645 | |
ffe60014 | 646 | /* Connect to relayd and make version check if uri is the control. */ |
6151a90f | 647 | ret = create_connect_relayd(relayd_uri, &rsock); |
ffe60014 | 648 | if (ret != LTTNG_OK) { |
6151a90f | 649 | goto error; |
ffe60014 | 650 | } |
6151a90f | 651 | assert(rsock); |
ffe60014 | 652 | |
2f77fc4b | 653 | /* Set the network sequence index if not set. */ |
d88aee68 DG |
654 | if (consumer->net_seq_index == (uint64_t) -1ULL) { |
655 | pthread_mutex_lock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
656 | /* |
657 | * Increment net_seq_idx because we are about to transfer the | |
658 | * new relayd socket to the consumer. | |
d88aee68 | 659 | * Assign unique key so the consumer can match streams. |
2f77fc4b | 660 | */ |
d88aee68 DG |
661 | consumer->net_seq_index = ++relayd_net_seq_idx; |
662 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
663 | } |
664 | ||
2f77fc4b | 665 | /* Send relayd socket to consumer. */ |
6151a90f | 666 | ret = consumer_send_relayd_socket(consumer_sock, rsock, consumer, |
d3e2ba59 JD |
667 | relayd_uri->stype, session_id, |
668 | session_name, hostname, session_live_timer); | |
2f77fc4b | 669 | if (ret < 0) { |
f73fabfd | 670 | ret = LTTNG_ERR_ENABLE_CONSUMER_FAIL; |
2f77fc4b DG |
671 | goto close_sock; |
672 | } | |
673 | ||
c890b720 DG |
674 | /* Flag that the corresponding socket was sent. */ |
675 | if (relayd_uri->stype == LTTNG_STREAM_CONTROL) { | |
ffe60014 | 676 | consumer_sock->control_sock_sent = 1; |
c890b720 | 677 | } else if (relayd_uri->stype == LTTNG_STREAM_DATA) { |
ffe60014 | 678 | consumer_sock->data_sock_sent = 1; |
c890b720 DG |
679 | } |
680 | ||
f73fabfd | 681 | ret = LTTNG_OK; |
2f77fc4b DG |
682 | |
683 | /* | |
684 | * Close socket which was dup on the consumer side. The session daemon does | |
685 | * NOT keep track of the relayd socket(s) once transfer to the consumer. | |
686 | */ | |
687 | ||
688 | close_sock: | |
6151a90f JD |
689 | (void) relayd_close(rsock); |
690 | free(rsock); | |
2f77fc4b | 691 | |
6151a90f | 692 | error: |
ffe60014 DG |
693 | if (ret != LTTNG_OK) { |
694 | /* | |
d9078d0c DG |
695 | * The consumer output for this session should not be used anymore |
696 | * since the relayd connection failed thus making any tracing or/and | |
697 | * streaming not usable. | |
ffe60014 | 698 | */ |
d9078d0c | 699 | consumer->enabled = 0; |
ffe60014 | 700 | } |
2f77fc4b DG |
701 | return ret; |
702 | } | |
703 | ||
704 | /* | |
705 | * Send both relayd sockets to a specific consumer and domain. This is a | |
706 | * helper function to facilitate sending the information to the consumer for a | |
707 | * session. | |
708 | */ | |
6dc3064a | 709 | static int send_consumer_relayd_sockets(int domain, unsigned int session_id, |
d3e2ba59 JD |
710 | struct consumer_output *consumer, struct consumer_socket *sock, |
711 | char *session_name, char *hostname, int session_live_timer) | |
2f77fc4b | 712 | { |
dda67f6c | 713 | int ret = LTTNG_OK; |
2f77fc4b | 714 | |
2f77fc4b | 715 | assert(consumer); |
6dc3064a | 716 | assert(sock); |
2f77fc4b | 717 | |
2f77fc4b | 718 | /* Sending control relayd socket. */ |
ffe60014 | 719 | if (!sock->control_sock_sent) { |
6dc3064a | 720 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
721 | &consumer->dst.net.control, consumer, sock, |
722 | session_name, hostname, session_live_timer); | |
c890b720 DG |
723 | if (ret != LTTNG_OK) { |
724 | goto error; | |
725 | } | |
2f77fc4b DG |
726 | } |
727 | ||
728 | /* Sending data relayd socket. */ | |
ffe60014 | 729 | if (!sock->data_sock_sent) { |
6dc3064a | 730 | ret = send_consumer_relayd_socket(domain, session_id, |
d3e2ba59 JD |
731 | &consumer->dst.net.data, consumer, sock, |
732 | session_name, hostname, session_live_timer); | |
c890b720 DG |
733 | if (ret != LTTNG_OK) { |
734 | goto error; | |
735 | } | |
2f77fc4b DG |
736 | } |
737 | ||
2f77fc4b DG |
738 | error: |
739 | return ret; | |
740 | } | |
741 | ||
742 | /* | |
743 | * Setup relayd connections for a tracing session. First creates the socket to | |
744 | * the relayd and send them to the right domain consumer. Consumer type MUST be | |
745 | * network. | |
746 | */ | |
ffe60014 | 747 | int cmd_setup_relayd(struct ltt_session *session) |
2f77fc4b | 748 | { |
f73fabfd | 749 | int ret = LTTNG_OK; |
2f77fc4b DG |
750 | struct ltt_ust_session *usess; |
751 | struct ltt_kernel_session *ksess; | |
752 | struct consumer_socket *socket; | |
753 | struct lttng_ht_iter iter; | |
754 | ||
755 | assert(session); | |
756 | ||
757 | usess = session->ust_session; | |
758 | ksess = session->kernel_session; | |
759 | ||
785d2d0d | 760 | DBG("Setting relayd for session %s", session->name); |
2f77fc4b | 761 | |
e7fe706f DG |
762 | rcu_read_lock(); |
763 | ||
2f77fc4b DG |
764 | if (usess && usess->consumer && usess->consumer->type == CONSUMER_DST_NET |
765 | && usess->consumer->enabled) { | |
766 | /* For each consumer socket, send relayd sockets */ | |
767 | cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter, | |
768 | socket, node.node) { | |
2f77fc4b | 769 | pthread_mutex_lock(socket->lock); |
6dc3064a | 770 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id, |
d3e2ba59 JD |
771 | usess->consumer, socket, |
772 | session->name, session->hostname, | |
773 | session->live_timer); | |
2f77fc4b | 774 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 775 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
776 | goto error; |
777 | } | |
6dc3064a DG |
778 | /* Session is now ready for network streaming. */ |
779 | session->net_handle = 1; | |
2f77fc4b DG |
780 | } |
781 | } | |
782 | ||
783 | if (ksess && ksess->consumer && ksess->consumer->type == CONSUMER_DST_NET | |
784 | && ksess->consumer->enabled) { | |
785 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter, | |
786 | socket, node.node) { | |
2f77fc4b | 787 | pthread_mutex_lock(socket->lock); |
6dc3064a | 788 | ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id, |
d3e2ba59 JD |
789 | ksess->consumer, socket, |
790 | session->name, session->hostname, | |
791 | session->live_timer); | |
2f77fc4b | 792 | pthread_mutex_unlock(socket->lock); |
f73fabfd | 793 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
794 | goto error; |
795 | } | |
6dc3064a DG |
796 | /* Session is now ready for network streaming. */ |
797 | session->net_handle = 1; | |
2f77fc4b DG |
798 | } |
799 | } | |
800 | ||
801 | error: | |
e7fe706f | 802 | rcu_read_unlock(); |
2f77fc4b DG |
803 | return ret; |
804 | } | |
805 | ||
9b6c7ec5 DG |
806 | /* |
807 | * Start a kernel session by opening all necessary streams. | |
808 | */ | |
809 | static int start_kernel_session(struct ltt_kernel_session *ksess, int wpipe) | |
810 | { | |
811 | int ret; | |
812 | struct ltt_kernel_channel *kchan; | |
813 | ||
814 | /* Open kernel metadata */ | |
07b86b52 | 815 | if (ksess->metadata == NULL && ksess->output_traces) { |
9b6c7ec5 DG |
816 | ret = kernel_open_metadata(ksess); |
817 | if (ret < 0) { | |
818 | ret = LTTNG_ERR_KERN_META_FAIL; | |
819 | goto error; | |
820 | } | |
821 | } | |
822 | ||
823 | /* Open kernel metadata stream */ | |
07b86b52 | 824 | if (ksess->metadata && ksess->metadata_stream_fd < 0) { |
9b6c7ec5 DG |
825 | ret = kernel_open_metadata_stream(ksess); |
826 | if (ret < 0) { | |
827 | ERR("Kernel create metadata stream failed"); | |
828 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
829 | goto error; | |
830 | } | |
831 | } | |
832 | ||
833 | /* For each channel */ | |
834 | cds_list_for_each_entry(kchan, &ksess->channel_list.head, list) { | |
835 | if (kchan->stream_count == 0) { | |
836 | ret = kernel_open_channel_stream(kchan); | |
837 | if (ret < 0) { | |
838 | ret = LTTNG_ERR_KERN_STREAM_FAIL; | |
839 | goto error; | |
840 | } | |
841 | /* Update the stream global counter */ | |
842 | ksess->stream_count_global += ret; | |
843 | } | |
844 | } | |
845 | ||
846 | /* Setup kernel consumer socket and send fds to it */ | |
847 | ret = init_kernel_tracing(ksess); | |
e43c41c5 | 848 | if (ret != 0) { |
9b6c7ec5 DG |
849 | ret = LTTNG_ERR_KERN_START_FAIL; |
850 | goto error; | |
851 | } | |
852 | ||
853 | /* This start the kernel tracing */ | |
854 | ret = kernel_start_session(ksess); | |
855 | if (ret < 0) { | |
856 | ret = LTTNG_ERR_KERN_START_FAIL; | |
857 | goto error; | |
858 | } | |
859 | ||
860 | /* Quiescent wait after starting trace */ | |
784303b0 | 861 | kernel_wait_quiescent(kernel_tracer_fd); |
9b6c7ec5 | 862 | |
14fb1ebe | 863 | ksess->active = 1; |
9b6c7ec5 DG |
864 | |
865 | ret = LTTNG_OK; | |
866 | ||
867 | error: | |
868 | return ret; | |
869 | } | |
870 | ||
2f77fc4b DG |
871 | /* |
872 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. | |
873 | */ | |
874 | int cmd_disable_channel(struct ltt_session *session, int domain, | |
875 | char *channel_name) | |
876 | { | |
877 | int ret; | |
878 | struct ltt_ust_session *usess; | |
879 | ||
880 | usess = session->ust_session; | |
881 | ||
2223c96f DG |
882 | rcu_read_lock(); |
883 | ||
2f77fc4b DG |
884 | switch (domain) { |
885 | case LTTNG_DOMAIN_KERNEL: | |
886 | { | |
887 | ret = channel_kernel_disable(session->kernel_session, | |
888 | channel_name); | |
f73fabfd | 889 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
890 | goto error; |
891 | } | |
892 | ||
893 | kernel_wait_quiescent(kernel_tracer_fd); | |
894 | break; | |
895 | } | |
896 | case LTTNG_DOMAIN_UST: | |
897 | { | |
898 | struct ltt_ust_channel *uchan; | |
899 | struct lttng_ht *chan_ht; | |
900 | ||
901 | chan_ht = usess->domain_global.channels; | |
902 | ||
903 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
904 | if (uchan == NULL) { | |
f73fabfd | 905 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
906 | goto error; |
907 | } | |
908 | ||
7972aab2 | 909 | ret = channel_ust_disable(usess, uchan); |
f73fabfd | 910 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
911 | goto error; |
912 | } | |
913 | break; | |
914 | } | |
915 | #if 0 | |
916 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
917 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
918 | case LTTNG_DOMAIN_UST_PID: | |
919 | #endif | |
920 | default: | |
f73fabfd | 921 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
2f77fc4b DG |
922 | goto error; |
923 | } | |
924 | ||
f73fabfd | 925 | ret = LTTNG_OK; |
2f77fc4b DG |
926 | |
927 | error: | |
2223c96f | 928 | rcu_read_unlock(); |
2f77fc4b DG |
929 | return ret; |
930 | } | |
931 | ||
ccf10263 MD |
932 | /* |
933 | * Command LTTNG_TRACK_PID processed by the client thread. | |
934 | */ | |
935 | int cmd_track_pid(struct ltt_session *session, int domain, int pid) | |
936 | { | |
937 | int ret; | |
938 | ||
939 | rcu_read_lock(); | |
940 | ||
941 | switch (domain) { | |
942 | case LTTNG_DOMAIN_KERNEL: | |
943 | { | |
944 | struct ltt_kernel_session *ksess; | |
945 | ||
946 | ksess = session->kernel_session; | |
947 | ||
948 | ret = kernel_track_pid(ksess, pid); | |
949 | if (ret != LTTNG_OK) { | |
950 | goto error; | |
951 | } | |
952 | ||
953 | kernel_wait_quiescent(kernel_tracer_fd); | |
954 | break; | |
955 | } | |
956 | #if 0 | |
957 | case LTTNG_DOMAIN_UST: | |
958 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
959 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
960 | case LTTNG_DOMAIN_UST_PID: | |
961 | #endif | |
962 | default: | |
963 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
964 | goto error; | |
965 | } | |
966 | ||
967 | ret = LTTNG_OK; | |
968 | ||
969 | error: | |
970 | rcu_read_unlock(); | |
971 | return ret; | |
972 | } | |
973 | ||
974 | /* | |
975 | * Command LTTNG_UNTRACK_PID processed by the client thread. | |
976 | */ | |
977 | int cmd_untrack_pid(struct ltt_session *session, int domain, int pid) | |
978 | { | |
979 | int ret; | |
980 | ||
981 | rcu_read_lock(); | |
982 | ||
983 | switch (domain) { | |
984 | case LTTNG_DOMAIN_KERNEL: | |
985 | { | |
986 | struct ltt_kernel_session *ksess; | |
987 | ||
988 | ksess = session->kernel_session; | |
989 | ||
990 | ret = kernel_untrack_pid(ksess, pid); | |
991 | if (ret != LTTNG_OK) { | |
992 | goto error; | |
993 | } | |
994 | ||
995 | kernel_wait_quiescent(kernel_tracer_fd); | |
996 | break; | |
997 | } | |
998 | #if 0 | |
999 | case LTTNG_DOMAIN_UST: | |
1000 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1001 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1002 | case LTTNG_DOMAIN_UST_PID: | |
1003 | #endif | |
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 | ||
1126 | ||
1127 | /* | |
1128 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
1129 | */ | |
1130 | int cmd_disable_event(struct ltt_session *session, int domain, | |
6e911cad MD |
1131 | char *channel_name, |
1132 | struct lttng_event *event) | |
2f77fc4b DG |
1133 | { |
1134 | int ret; | |
6e911cad MD |
1135 | char *event_name; |
1136 | ||
18a720cd MD |
1137 | DBG("Disable event command for event \'%s\'", event->name); |
1138 | ||
6e911cad MD |
1139 | event_name = event->name; |
1140 | ||
9b7431cf JG |
1141 | /* Error out on unhandled search criteria */ |
1142 | if (event->loglevel_type || event->loglevel != -1 || event->enabled | |
6e911cad MD |
1143 | || event->pid || event->filter || event->exclusion) { |
1144 | return LTTNG_ERR_UNK; | |
1145 | } | |
18a720cd MD |
1146 | /* Special handling for kernel domain all events. */ |
1147 | if (domain == LTTNG_DOMAIN_KERNEL && !strcmp(event_name, "*")) { | |
1148 | return disable_kevent_all(session, domain, channel_name, event); | |
1149 | } | |
2f77fc4b | 1150 | |
2223c96f DG |
1151 | rcu_read_lock(); |
1152 | ||
2f77fc4b DG |
1153 | switch (domain) { |
1154 | case LTTNG_DOMAIN_KERNEL: | |
1155 | { | |
1156 | struct ltt_kernel_channel *kchan; | |
1157 | struct ltt_kernel_session *ksess; | |
1158 | ||
1159 | ksess = session->kernel_session; | |
1160 | ||
85076754 MD |
1161 | /* |
1162 | * If a non-default channel has been created in the | |
1163 | * session, explicitely require that -c chan_name needs | |
1164 | * to be provided. | |
1165 | */ | |
1166 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1167 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1168 | goto error; | |
1169 | } | |
1170 | ||
2f77fc4b DG |
1171 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1172 | if (kchan == NULL) { | |
f73fabfd | 1173 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1174 | goto error; |
1175 | } | |
1176 | ||
6e911cad MD |
1177 | switch (event->type) { |
1178 | case LTTNG_EVENT_ALL: | |
1179 | case LTTNG_EVENT_TRACEPOINT: | |
1180 | ret = event_kernel_disable_tracepoint(kchan, event_name); | |
1181 | if (ret != LTTNG_OK) { | |
1182 | goto error; | |
1183 | } | |
1184 | break; | |
1185 | case LTTNG_EVENT_SYSCALL: | |
1186 | ret = event_kernel_disable_syscall(kchan, event_name); | |
e2b957af MD |
1187 | if (ret != LTTNG_OK) { |
1188 | goto error; | |
1189 | } | |
6e911cad MD |
1190 | break; |
1191 | default: | |
1192 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1193 | goto error; |
1194 | } | |
1195 | ||
1196 | kernel_wait_quiescent(kernel_tracer_fd); | |
1197 | break; | |
1198 | } | |
1199 | case LTTNG_DOMAIN_UST: | |
1200 | { | |
1201 | struct ltt_ust_channel *uchan; | |
1202 | struct ltt_ust_session *usess; | |
1203 | ||
1204 | usess = session->ust_session; | |
1205 | ||
85076754 MD |
1206 | /* |
1207 | * If a non-default channel has been created in the | |
1208 | * session, explicitely require that -c chan_name needs | |
1209 | * to be provided. | |
1210 | */ | |
1211 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1212 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1213 | goto error; | |
1214 | } | |
1215 | ||
2f77fc4b DG |
1216 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
1217 | channel_name); | |
1218 | if (uchan == NULL) { | |
f73fabfd | 1219 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
2f77fc4b DG |
1220 | goto error; |
1221 | } | |
1222 | ||
6e911cad MD |
1223 | switch (event->type) { |
1224 | case LTTNG_EVENT_ALL: | |
1225 | ret = event_ust_disable_tracepoint(usess, uchan, event_name); | |
1226 | if (ret != LTTNG_OK) { | |
1227 | goto error; | |
1228 | } | |
1229 | break; | |
1230 | default: | |
1231 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1232 | goto error; |
1233 | } | |
1234 | ||
1235 | DBG3("Disable UST event %s in channel %s completed", event_name, | |
1236 | channel_name); | |
1237 | break; | |
1238 | } | |
5cdb6027 | 1239 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1240 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1241 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1242 | { |
fefd409b | 1243 | struct agent *agt; |
f20baf8e DG |
1244 | struct ltt_ust_session *usess = session->ust_session; |
1245 | ||
1246 | assert(usess); | |
1247 | ||
6e911cad MD |
1248 | switch (event->type) { |
1249 | case LTTNG_EVENT_ALL: | |
1250 | break; | |
1251 | default: | |
1252 | ret = LTTNG_ERR_UNK; | |
1253 | goto error; | |
1254 | } | |
1255 | ||
5cdb6027 | 1256 | agt = trace_ust_find_agent(usess, domain); |
fefd409b DG |
1257 | if (!agt) { |
1258 | ret = -LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
1259 | goto error; | |
1260 | } | |
18a720cd MD |
1261 | /* The wild card * means that everything should be disabled. */ |
1262 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
1263 | ret = event_agent_disable_all(usess, agt); | |
1264 | } else { | |
1265 | ret = event_agent_disable(usess, agt, event_name); | |
1266 | } | |
f20baf8e DG |
1267 | if (ret != LTTNG_OK) { |
1268 | goto error; | |
1269 | } | |
1270 | ||
1271 | break; | |
1272 | } | |
2f77fc4b DG |
1273 | #if 0 |
1274 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1275 | case LTTNG_DOMAIN_UST_PID: | |
1276 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1277 | #endif | |
1278 | default: | |
f73fabfd | 1279 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1280 | goto error; |
1281 | } | |
1282 | ||
f73fabfd | 1283 | ret = LTTNG_OK; |
2f77fc4b DG |
1284 | |
1285 | error: | |
2223c96f | 1286 | rcu_read_unlock(); |
2f77fc4b DG |
1287 | return ret; |
1288 | } | |
1289 | ||
1290 | /* | |
18a720cd | 1291 | * Command LTTNG_DISABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1292 | */ |
18a720cd MD |
1293 | static |
1294 | int disable_kevent_all(struct ltt_session *session, int domain, | |
6e911cad MD |
1295 | char *channel_name, |
1296 | struct lttng_event *event) | |
2f77fc4b DG |
1297 | { |
1298 | int ret; | |
1299 | ||
2223c96f DG |
1300 | rcu_read_lock(); |
1301 | ||
2f77fc4b DG |
1302 | switch (domain) { |
1303 | case LTTNG_DOMAIN_KERNEL: | |
1304 | { | |
1305 | struct ltt_kernel_session *ksess; | |
1306 | struct ltt_kernel_channel *kchan; | |
1307 | ||
1308 | ksess = session->kernel_session; | |
1309 | ||
85076754 MD |
1310 | /* |
1311 | * If a non-default channel has been created in the | |
1312 | * session, explicitely require that -c chan_name needs | |
1313 | * to be provided. | |
1314 | */ | |
1315 | if (ksess->has_non_default_channel && channel_name[0] == '\0') { | |
1316 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1317 | goto error; | |
1318 | } | |
1319 | ||
2f77fc4b DG |
1320 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); |
1321 | if (kchan == NULL) { | |
f73fabfd | 1322 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; |
2f77fc4b DG |
1323 | goto error; |
1324 | } | |
1325 | ||
6e911cad MD |
1326 | switch (event->type) { |
1327 | case LTTNG_EVENT_ALL: | |
1328 | ret = event_kernel_disable_all(kchan); | |
1329 | if (ret != LTTNG_OK) { | |
1330 | goto error; | |
1331 | } | |
1332 | break; | |
1333 | case LTTNG_EVENT_SYSCALL: | |
e2b957af MD |
1334 | ret = event_kernel_disable_syscall(kchan, ""); |
1335 | if (ret != LTTNG_OK) { | |
1336 | goto error; | |
1337 | } | |
6e911cad MD |
1338 | break; |
1339 | default: | |
1340 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1341 | goto error; |
1342 | } | |
1343 | ||
1344 | kernel_wait_quiescent(kernel_tracer_fd); | |
1345 | break; | |
1346 | } | |
2f77fc4b | 1347 | default: |
f73fabfd | 1348 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1349 | goto error; |
1350 | } | |
1351 | ||
f73fabfd | 1352 | ret = LTTNG_OK; |
2f77fc4b DG |
1353 | |
1354 | error: | |
2223c96f | 1355 | rcu_read_unlock(); |
2f77fc4b DG |
1356 | return ret; |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
1361 | */ | |
1362 | int cmd_add_context(struct ltt_session *session, int domain, | |
601d5acf | 1363 | char *channel_name, struct lttng_event_context *ctx, int kwpipe) |
2f77fc4b | 1364 | { |
d5979e4a | 1365 | int ret, chan_kern_created = 0, chan_ust_created = 0; |
2f77fc4b DG |
1366 | |
1367 | switch (domain) { | |
1368 | case LTTNG_DOMAIN_KERNEL: | |
979e618e DG |
1369 | assert(session->kernel_session); |
1370 | ||
1371 | if (session->kernel_session->channel_count == 0) { | |
1372 | /* Create default channel */ | |
1373 | ret = channel_kernel_create(session->kernel_session, NULL, kwpipe); | |
1374 | if (ret != LTTNG_OK) { | |
1375 | goto error; | |
1376 | } | |
d5979e4a | 1377 | chan_kern_created = 1; |
979e618e | 1378 | } |
2f77fc4b | 1379 | /* Add kernel context to kernel tracer */ |
601d5acf | 1380 | ret = context_kernel_add(session->kernel_session, ctx, channel_name); |
f73fabfd | 1381 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1382 | goto error; |
1383 | } | |
1384 | break; | |
1385 | case LTTNG_DOMAIN_UST: | |
1386 | { | |
1387 | struct ltt_ust_session *usess = session->ust_session; | |
85076754 MD |
1388 | unsigned int chan_count; |
1389 | ||
2f77fc4b DG |
1390 | assert(usess); |
1391 | ||
85076754 | 1392 | chan_count = lttng_ht_get_count(usess->domain_global.channels); |
979e618e DG |
1393 | if (chan_count == 0) { |
1394 | struct lttng_channel *attr; | |
1395 | /* Create default channel */ | |
0a9c6494 | 1396 | attr = channel_new_default_attr(domain, usess->buffer_type); |
979e618e DG |
1397 | if (attr == NULL) { |
1398 | ret = LTTNG_ERR_FATAL; | |
1399 | goto error; | |
1400 | } | |
1401 | ||
7972aab2 | 1402 | ret = channel_ust_create(usess, attr, usess->buffer_type); |
979e618e DG |
1403 | if (ret != LTTNG_OK) { |
1404 | free(attr); | |
1405 | goto error; | |
1406 | } | |
1407 | free(attr); | |
d5979e4a | 1408 | chan_ust_created = 1; |
979e618e DG |
1409 | } |
1410 | ||
601d5acf | 1411 | ret = context_ust_add(usess, domain, ctx, channel_name); |
f73fabfd | 1412 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1413 | goto error; |
1414 | } | |
1415 | break; | |
1416 | } | |
1417 | #if 0 | |
1418 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1419 | case LTTNG_DOMAIN_UST_PID: | |
1420 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1421 | #endif | |
1422 | default: | |
f73fabfd | 1423 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1424 | goto error; |
1425 | } | |
1426 | ||
d5979e4a | 1427 | return LTTNG_OK; |
2f77fc4b DG |
1428 | |
1429 | error: | |
d5979e4a DG |
1430 | if (chan_kern_created) { |
1431 | struct ltt_kernel_channel *kchan = | |
1432 | trace_kernel_get_channel_by_name(DEFAULT_CHANNEL_NAME, | |
1433 | session->kernel_session); | |
1434 | /* Created previously, this should NOT fail. */ | |
1435 | assert(kchan); | |
1436 | kernel_destroy_channel(kchan); | |
1437 | } | |
1438 | ||
1439 | if (chan_ust_created) { | |
1440 | struct ltt_ust_channel *uchan = | |
1441 | trace_ust_find_channel_by_name( | |
1442 | session->ust_session->domain_global.channels, | |
1443 | DEFAULT_CHANNEL_NAME); | |
1444 | /* Created previously, this should NOT fail. */ | |
1445 | assert(uchan); | |
1446 | /* Remove from the channel list of the session. */ | |
1447 | trace_ust_delete_channel(session->ust_session->domain_global.channels, | |
1448 | uchan); | |
1449 | trace_ust_destroy_channel(uchan); | |
1450 | } | |
2f77fc4b DG |
1451 | return ret; |
1452 | } | |
1453 | ||
930a2e99 JG |
1454 | static int validate_event_name(const char *name) |
1455 | { | |
1456 | int ret = 0; | |
1457 | const char *c = name; | |
1458 | const char *event_name_end = c + LTTNG_SYMBOL_NAME_LEN; | |
1459 | ||
1460 | /* | |
1461 | * Make sure that unescaped wildcards are only used as the last | |
1462 | * character of the event name. | |
1463 | */ | |
1464 | while (c < event_name_end) { | |
1465 | switch (*c) { | |
1466 | case '\0': | |
1467 | goto end; | |
1468 | case '\\': | |
1469 | c++; | |
1470 | break; | |
1471 | case '*': | |
1472 | if ((c + 1) < event_name_end && *(c + 1)) { | |
1473 | /* Wildcard is not the last character */ | |
1474 | ret = LTTNG_ERR_INVALID_EVENT_NAME; | |
1475 | goto end; | |
1476 | } | |
1477 | default: | |
1478 | break; | |
1479 | } | |
1480 | c++; | |
1481 | } | |
1482 | end: | |
1483 | return ret; | |
1484 | } | |
1485 | ||
2f77fc4b DG |
1486 | /* |
1487 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
49d21f93 | 1488 | * We own filter, exclusion, and filter_expression. |
2f77fc4b | 1489 | */ |
7972aab2 | 1490 | int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, |
025faf73 | 1491 | char *channel_name, struct lttng_event *event, |
6b453b5e | 1492 | char *filter_expression, |
db8f1377 JI |
1493 | struct lttng_filter_bytecode *filter, |
1494 | struct lttng_event_exclusion *exclusion, | |
1495 | int wpipe) | |
2f77fc4b | 1496 | { |
e5f5db7f | 1497 | int ret, channel_created = 0; |
2f77fc4b DG |
1498 | struct lttng_channel *attr; |
1499 | ||
1500 | assert(session); | |
1501 | assert(event); | |
1502 | assert(channel_name); | |
1503 | ||
18a720cd MD |
1504 | DBG("Enable event command for event \'%s\'", event->name); |
1505 | ||
1506 | /* Special handling for kernel domain all events. */ | |
1507 | if (domain->type == LTTNG_DOMAIN_KERNEL && !strcmp(event->name, "*")) { | |
1508 | return enable_kevent_all(session, domain, channel_name, event, | |
1509 | filter_expression, filter, wpipe); | |
1510 | } | |
1511 | ||
930a2e99 JG |
1512 | ret = validate_event_name(event->name); |
1513 | if (ret) { | |
1514 | goto error; | |
1515 | } | |
1516 | ||
2223c96f DG |
1517 | rcu_read_lock(); |
1518 | ||
7972aab2 | 1519 | switch (domain->type) { |
2f77fc4b DG |
1520 | case LTTNG_DOMAIN_KERNEL: |
1521 | { | |
1522 | struct ltt_kernel_channel *kchan; | |
1523 | ||
85076754 MD |
1524 | /* |
1525 | * If a non-default channel has been created in the | |
1526 | * session, explicitely require that -c chan_name needs | |
1527 | * to be provided. | |
1528 | */ | |
1529 | if (session->kernel_session->has_non_default_channel | |
1530 | && channel_name[0] == '\0') { | |
1531 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1532 | goto error; | |
1533 | } | |
1534 | ||
2f77fc4b DG |
1535 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1536 | session->kernel_session); | |
1537 | if (kchan == NULL) { | |
0a9c6494 DG |
1538 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1539 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1540 | if (attr == NULL) { |
f73fabfd | 1541 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1542 | goto error; |
1543 | } | |
1544 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1545 | ||
1546 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1547 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1548 | free(attr); |
1549 | goto error; | |
1550 | } | |
1551 | free(attr); | |
e5f5db7f DG |
1552 | |
1553 | channel_created = 1; | |
2f77fc4b DG |
1554 | } |
1555 | ||
1556 | /* Get the newly created kernel channel pointer */ | |
1557 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1558 | session->kernel_session); | |
1559 | if (kchan == NULL) { | |
1560 | /* This sould not happen... */ | |
f73fabfd | 1561 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1562 | goto error; |
1563 | } | |
1564 | ||
6e911cad MD |
1565 | switch (event->type) { |
1566 | case LTTNG_EVENT_ALL: | |
6e6ef3d7 DG |
1567 | case LTTNG_EVENT_PROBE: |
1568 | case LTTNG_EVENT_FUNCTION: | |
1569 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
6e911cad MD |
1570 | case LTTNG_EVENT_TRACEPOINT: |
1571 | ret = event_kernel_enable_tracepoint(kchan, event); | |
1572 | if (ret != LTTNG_OK) { | |
1573 | if (channel_created) { | |
1574 | /* Let's not leak a useless channel. */ | |
1575 | kernel_destroy_channel(kchan); | |
1576 | } | |
1577 | goto error; | |
e5f5db7f | 1578 | } |
6e911cad MD |
1579 | break; |
1580 | case LTTNG_EVENT_SYSCALL: | |
1581 | ret = event_kernel_enable_syscall(kchan, event->name); | |
e2b957af MD |
1582 | if (ret != LTTNG_OK) { |
1583 | goto error; | |
1584 | } | |
6e911cad MD |
1585 | break; |
1586 | default: | |
1587 | ret = LTTNG_ERR_UNK; | |
2f77fc4b DG |
1588 | goto error; |
1589 | } | |
1590 | ||
1591 | kernel_wait_quiescent(kernel_tracer_fd); | |
1592 | break; | |
1593 | } | |
1594 | case LTTNG_DOMAIN_UST: | |
1595 | { | |
1596 | struct ltt_ust_channel *uchan; | |
1597 | struct ltt_ust_session *usess = session->ust_session; | |
1598 | ||
1599 | assert(usess); | |
1600 | ||
85076754 MD |
1601 | /* |
1602 | * If a non-default channel has been created in the | |
1603 | * session, explicitely require that -c chan_name needs | |
1604 | * to be provided. | |
1605 | */ | |
1606 | if (usess->has_non_default_channel && channel_name[0] == '\0') { | |
1607 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1608 | goto error; | |
1609 | } | |
1610 | ||
2f77fc4b DG |
1611 | /* Get channel from global UST domain */ |
1612 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
1613 | channel_name); | |
1614 | if (uchan == NULL) { | |
1615 | /* Create default channel */ | |
0a9c6494 DG |
1616 | attr = channel_new_default_attr(LTTNG_DOMAIN_UST, |
1617 | usess->buffer_type); | |
2f77fc4b | 1618 | if (attr == NULL) { |
f73fabfd | 1619 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1620 | goto error; |
1621 | } | |
1622 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1623 | ||
1624 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1625 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1626 | free(attr); |
1627 | goto error; | |
1628 | } | |
1629 | free(attr); | |
1630 | ||
1631 | /* Get the newly created channel reference back */ | |
1632 | uchan = trace_ust_find_channel_by_name( | |
1633 | usess->domain_global.channels, channel_name); | |
1634 | assert(uchan); | |
1635 | } | |
1636 | ||
1637 | /* At this point, the session and channel exist on the tracer */ | |
6b453b5e JG |
1638 | ret = event_ust_enable_tracepoint(usess, uchan, event, |
1639 | filter_expression, filter, exclusion); | |
49d21f93 MD |
1640 | /* We have passed ownership */ |
1641 | filter_expression = NULL; | |
1642 | filter = NULL; | |
1643 | exclusion = NULL; | |
f73fabfd | 1644 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1645 | goto error; |
1646 | } | |
1647 | break; | |
1648 | } | |
5cdb6027 | 1649 | case LTTNG_DOMAIN_LOG4J: |
f20baf8e | 1650 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1651 | case LTTNG_DOMAIN_PYTHON: |
f20baf8e | 1652 | { |
da6c3a50 | 1653 | const char *default_event_name, *default_chan_name; |
fefd409b | 1654 | struct agent *agt; |
f20baf8e DG |
1655 | struct lttng_event uevent; |
1656 | struct lttng_domain tmp_dom; | |
1657 | struct ltt_ust_session *usess = session->ust_session; | |
1658 | ||
1659 | assert(usess); | |
1660 | ||
5cdb6027 | 1661 | agt = trace_ust_find_agent(usess, domain->type); |
fefd409b | 1662 | if (!agt) { |
5cdb6027 | 1663 | agt = agent_create(domain->type); |
fefd409b DG |
1664 | if (!agt) { |
1665 | ret = -LTTNG_ERR_NOMEM; | |
1666 | goto error; | |
1667 | } | |
1668 | agent_add(agt, usess->agents); | |
1669 | } | |
1670 | ||
022d91ba | 1671 | /* Create the default tracepoint. */ |
996de3c7 | 1672 | memset(&uevent, 0, sizeof(uevent)); |
f20baf8e DG |
1673 | uevent.type = LTTNG_EVENT_TRACEPOINT; |
1674 | uevent.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
da6c3a50 DG |
1675 | default_event_name = event_get_default_agent_ust_name(domain->type); |
1676 | if (!default_event_name) { | |
1677 | ret = -LTTNG_ERR_FATAL; | |
1678 | goto error; | |
f43f95a9 | 1679 | } |
da6c3a50 | 1680 | strncpy(uevent.name, default_event_name, sizeof(uevent.name)); |
f20baf8e DG |
1681 | uevent.name[sizeof(uevent.name) - 1] = '\0'; |
1682 | ||
1683 | /* | |
1684 | * The domain type is changed because we are about to enable the | |
1685 | * default channel and event for the JUL domain that are hardcoded. | |
1686 | * This happens in the UST domain. | |
1687 | */ | |
1688 | memcpy(&tmp_dom, domain, sizeof(tmp_dom)); | |
1689 | tmp_dom.type = LTTNG_DOMAIN_UST; | |
1690 | ||
0e115563 DG |
1691 | switch (domain->type) { |
1692 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 1693 | default_chan_name = DEFAULT_LOG4J_CHANNEL_NAME; |
0e115563 DG |
1694 | break; |
1695 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 1696 | default_chan_name = DEFAULT_JUL_CHANNEL_NAME; |
0e115563 DG |
1697 | break; |
1698 | case LTTNG_DOMAIN_PYTHON: | |
1699 | default_chan_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
1700 | break; | |
1701 | default: | |
1702 | /* The switch/case we are in should avoid this else big problem */ | |
1703 | assert(0); | |
da6c3a50 DG |
1704 | } |
1705 | ||
971da06a JG |
1706 | { |
1707 | struct lttng_filter_bytecode *filter_copy = NULL; | |
1708 | ||
1709 | if (filter) { | |
1710 | filter_copy = zmalloc( | |
1711 | sizeof(struct lttng_filter_bytecode) | |
1712 | + filter->len); | |
1713 | if (!filter_copy) { | |
1714 | goto error; | |
1715 | } | |
1716 | ||
1717 | memcpy(filter_copy, filter, | |
1718 | sizeof(struct lttng_filter_bytecode) | |
1719 | + filter->len); | |
1720 | } | |
1721 | ||
1722 | ret = cmd_enable_event(session, &tmp_dom, | |
1723 | (char *) default_chan_name, | |
1724 | &uevent, filter_expression, filter_copy, | |
1725 | NULL, wpipe); | |
1726 | /* We have passed ownership */ | |
1727 | filter_expression = NULL; | |
1728 | } | |
1729 | ||
f20baf8e DG |
1730 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { |
1731 | goto error; | |
1732 | } | |
1733 | ||
1734 | /* The wild card * means that everything should be enabled. */ | |
1735 | if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { | |
fefd409b | 1736 | ret = event_agent_enable_all(usess, agt, event, filter); |
971da06a | 1737 | filter = NULL; |
f20baf8e | 1738 | } else { |
fefd409b | 1739 | ret = event_agent_enable(usess, agt, event, filter); |
971da06a | 1740 | filter = NULL; |
f20baf8e DG |
1741 | } |
1742 | if (ret != LTTNG_OK) { | |
1743 | goto error; | |
1744 | } | |
1745 | ||
1746 | break; | |
1747 | } | |
2f77fc4b DG |
1748 | #if 0 |
1749 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1750 | case LTTNG_DOMAIN_UST_PID: | |
1751 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
1752 | #endif | |
1753 | default: | |
f73fabfd | 1754 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1755 | goto error; |
1756 | } | |
1757 | ||
f73fabfd | 1758 | ret = LTTNG_OK; |
2f77fc4b DG |
1759 | |
1760 | error: | |
49d21f93 MD |
1761 | free(filter_expression); |
1762 | free(filter); | |
1763 | free(exclusion); | |
2223c96f | 1764 | rcu_read_unlock(); |
2f77fc4b DG |
1765 | return ret; |
1766 | } | |
1767 | ||
1768 | /* | |
18a720cd | 1769 | * Command LTTNG_ENABLE_EVENT for event "*" processed by the client thread. |
2f77fc4b | 1770 | */ |
18a720cd MD |
1771 | static |
1772 | int enable_kevent_all(struct ltt_session *session, | |
1773 | struct lttng_domain *domain, char *channel_name, | |
1774 | struct lttng_event *event, | |
6b453b5e | 1775 | char *filter_expression, |
025faf73 | 1776 | struct lttng_filter_bytecode *filter, int wpipe) |
2f77fc4b DG |
1777 | { |
1778 | int ret; | |
1779 | struct lttng_channel *attr; | |
1780 | ||
1781 | assert(session); | |
1782 | assert(channel_name); | |
1783 | ||
2223c96f DG |
1784 | rcu_read_lock(); |
1785 | ||
7972aab2 | 1786 | switch (domain->type) { |
2f77fc4b DG |
1787 | case LTTNG_DOMAIN_KERNEL: |
1788 | { | |
1789 | struct ltt_kernel_channel *kchan; | |
1790 | ||
1791 | assert(session->kernel_session); | |
1792 | ||
85076754 MD |
1793 | /* |
1794 | * If a non-default channel has been created in the | |
1795 | * session, explicitely require that -c chan_name needs | |
1796 | * to be provided. | |
1797 | */ | |
1798 | if (session->kernel_session->has_non_default_channel | |
1799 | && channel_name[0] == '\0') { | |
1800 | ret = LTTNG_ERR_NEED_CHANNEL_NAME; | |
1801 | goto error; | |
1802 | } | |
1803 | ||
2f77fc4b DG |
1804 | kchan = trace_kernel_get_channel_by_name(channel_name, |
1805 | session->kernel_session); | |
1806 | if (kchan == NULL) { | |
1807 | /* Create default channel */ | |
0a9c6494 DG |
1808 | attr = channel_new_default_attr(LTTNG_DOMAIN_KERNEL, |
1809 | LTTNG_BUFFER_GLOBAL); | |
2f77fc4b | 1810 | if (attr == NULL) { |
f73fabfd | 1811 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
1812 | goto error; |
1813 | } | |
1814 | strncpy(attr->name, channel_name, sizeof(attr->name)); | |
1815 | ||
1816 | ret = cmd_enable_channel(session, domain, attr, wpipe); | |
f73fabfd | 1817 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
1818 | free(attr); |
1819 | goto error; | |
1820 | } | |
1821 | free(attr); | |
1822 | ||
1823 | /* Get the newly created kernel channel pointer */ | |
1824 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
1825 | session->kernel_session); | |
1826 | assert(kchan); | |
1827 | } | |
1828 | ||
18a720cd | 1829 | switch (event->type) { |
2f77fc4b | 1830 | case LTTNG_EVENT_SYSCALL: |
6e911cad | 1831 | ret = event_kernel_enable_syscall(kchan, ""); |
e2b957af MD |
1832 | if (ret != LTTNG_OK) { |
1833 | goto error; | |
1834 | } | |
2f77fc4b DG |
1835 | break; |
1836 | case LTTNG_EVENT_TRACEPOINT: | |
1837 | /* | |
1838 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and | |
1839 | * events already registered to the channel. | |
1840 | */ | |
d3a56674 | 1841 | ret = event_kernel_enable_all_tracepoints(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1842 | break; |
1843 | case LTTNG_EVENT_ALL: | |
1844 | /* Enable syscalls and tracepoints */ | |
d3a56674 | 1845 | ret = event_kernel_enable_all(kchan, kernel_tracer_fd); |
2f77fc4b DG |
1846 | break; |
1847 | default: | |
f73fabfd | 1848 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
1849 | goto error; |
1850 | } | |
1851 | ||
1852 | /* Manage return value */ | |
f73fabfd | 1853 | if (ret != LTTNG_OK) { |
e5f5db7f DG |
1854 | /* |
1855 | * On error, cmd_enable_channel call will take care of destroying | |
1856 | * the created channel if it was needed. | |
1857 | */ | |
2f77fc4b DG |
1858 | goto error; |
1859 | } | |
1860 | ||
1861 | kernel_wait_quiescent(kernel_tracer_fd); | |
1862 | break; | |
1863 | } | |
2f77fc4b | 1864 | default: |
f73fabfd | 1865 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1866 | goto error; |
1867 | } | |
1868 | ||
f73fabfd | 1869 | ret = LTTNG_OK; |
2f77fc4b DG |
1870 | |
1871 | error: | |
2223c96f | 1872 | rcu_read_unlock(); |
2f77fc4b DG |
1873 | return ret; |
1874 | } | |
1875 | ||
1876 | ||
1877 | /* | |
1878 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
1879 | */ | |
1880 | ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
1881 | { | |
1882 | int ret; | |
1883 | ssize_t nb_events = 0; | |
1884 | ||
1885 | switch (domain) { | |
1886 | case LTTNG_DOMAIN_KERNEL: | |
1887 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
1888 | if (nb_events < 0) { | |
f73fabfd | 1889 | ret = LTTNG_ERR_KERN_LIST_FAIL; |
2f77fc4b DG |
1890 | goto error; |
1891 | } | |
1892 | break; | |
1893 | case LTTNG_DOMAIN_UST: | |
1894 | nb_events = ust_app_list_events(events); | |
1895 | if (nb_events < 0) { | |
f73fabfd | 1896 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1897 | goto error; |
1898 | } | |
1899 | break; | |
5cdb6027 | 1900 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 1901 | case LTTNG_DOMAIN_JUL: |
0e115563 | 1902 | case LTTNG_DOMAIN_PYTHON: |
f60140a1 | 1903 | nb_events = agent_list_events(events, domain); |
3c6a091f DG |
1904 | if (nb_events < 0) { |
1905 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
1906 | goto error; | |
1907 | } | |
1908 | break; | |
2f77fc4b | 1909 | default: |
f73fabfd | 1910 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1911 | goto error; |
1912 | } | |
1913 | ||
1914 | return nb_events; | |
1915 | ||
1916 | error: | |
1917 | /* Return negative value to differentiate return code */ | |
1918 | return -ret; | |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
1923 | */ | |
1924 | ssize_t cmd_list_tracepoint_fields(int domain, | |
1925 | struct lttng_event_field **fields) | |
1926 | { | |
1927 | int ret; | |
1928 | ssize_t nb_fields = 0; | |
1929 | ||
1930 | switch (domain) { | |
1931 | case LTTNG_DOMAIN_UST: | |
1932 | nb_fields = ust_app_list_event_fields(fields); | |
1933 | if (nb_fields < 0) { | |
f73fabfd | 1934 | ret = LTTNG_ERR_UST_LIST_FAIL; |
2f77fc4b DG |
1935 | goto error; |
1936 | } | |
1937 | break; | |
1938 | case LTTNG_DOMAIN_KERNEL: | |
1939 | default: /* fall-through */ | |
f73fabfd | 1940 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
1941 | goto error; |
1942 | } | |
1943 | ||
1944 | return nb_fields; | |
1945 | ||
1946 | error: | |
1947 | /* Return negative value to differentiate return code */ | |
1948 | return -ret; | |
1949 | } | |
1950 | ||
834978fd DG |
1951 | ssize_t cmd_list_syscalls(struct lttng_event **events) |
1952 | { | |
1953 | return syscall_table_list(events); | |
1954 | } | |
1955 | ||
2f77fc4b DG |
1956 | /* |
1957 | * Command LTTNG_START_TRACE processed by the client thread. | |
1958 | */ | |
1959 | int cmd_start_trace(struct ltt_session *session) | |
1960 | { | |
1961 | int ret; | |
cde3e505 | 1962 | unsigned long nb_chan = 0; |
2f77fc4b DG |
1963 | struct ltt_kernel_session *ksession; |
1964 | struct ltt_ust_session *usess; | |
2f77fc4b DG |
1965 | |
1966 | assert(session); | |
1967 | ||
1968 | /* Ease our life a bit ;) */ | |
1969 | ksession = session->kernel_session; | |
1970 | usess = session->ust_session; | |
1971 | ||
8382cf6f DG |
1972 | /* Is the session already started? */ |
1973 | if (session->active) { | |
f73fabfd | 1974 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
1975 | goto error; |
1976 | } | |
1977 | ||
cde3e505 DG |
1978 | /* |
1979 | * Starting a session without channel is useless since after that it's not | |
1980 | * possible to enable channel thus inform the client. | |
1981 | */ | |
1982 | if (usess && usess->domain_global.channels) { | |
a9e41044 | 1983 | rcu_read_lock(); |
cde3e505 | 1984 | nb_chan += lttng_ht_get_count(usess->domain_global.channels); |
a9e41044 | 1985 | rcu_read_unlock(); |
cde3e505 DG |
1986 | } |
1987 | if (ksession) { | |
1988 | nb_chan += ksession->channel_count; | |
1989 | } | |
1990 | if (!nb_chan) { | |
1991 | ret = LTTNG_ERR_NO_CHANNEL; | |
1992 | goto error; | |
1993 | } | |
1994 | ||
2f77fc4b DG |
1995 | /* Kernel tracing */ |
1996 | if (ksession != NULL) { | |
9b6c7ec5 DG |
1997 | ret = start_kernel_session(ksession, kernel_tracer_fd); |
1998 | if (ret != LTTNG_OK) { | |
2f77fc4b DG |
1999 | goto error; |
2000 | } | |
2f77fc4b DG |
2001 | } |
2002 | ||
2003 | /* Flag session that trace should start automatically */ | |
2004 | if (usess) { | |
14fb1ebe DG |
2005 | /* |
2006 | * Even though the start trace might fail, flag this session active so | |
2007 | * other application coming in are started by default. | |
2008 | */ | |
2009 | usess->active = 1; | |
2f77fc4b DG |
2010 | |
2011 | ret = ust_app_start_trace_all(usess); | |
2012 | if (ret < 0) { | |
f73fabfd | 2013 | ret = LTTNG_ERR_UST_START_FAIL; |
2f77fc4b DG |
2014 | goto error; |
2015 | } | |
2016 | } | |
2017 | ||
8382cf6f DG |
2018 | /* Flag this after a successful start. */ |
2019 | session->has_been_started = 1; | |
2020 | session->active = 1; | |
9b6c7ec5 | 2021 | |
f73fabfd | 2022 | ret = LTTNG_OK; |
2f77fc4b DG |
2023 | |
2024 | error: | |
2025 | return ret; | |
2026 | } | |
2027 | ||
2028 | /* | |
2029 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2030 | */ | |
2031 | int cmd_stop_trace(struct ltt_session *session) | |
2032 | { | |
2033 | int ret; | |
2034 | struct ltt_kernel_channel *kchan; | |
2035 | struct ltt_kernel_session *ksession; | |
2036 | struct ltt_ust_session *usess; | |
2037 | ||
2038 | assert(session); | |
2039 | ||
2040 | /* Short cut */ | |
2041 | ksession = session->kernel_session; | |
2042 | usess = session->ust_session; | |
2043 | ||
8382cf6f DG |
2044 | /* Session is not active. Skip everythong and inform the client. */ |
2045 | if (!session->active) { | |
f73fabfd | 2046 | ret = LTTNG_ERR_TRACE_ALREADY_STOPPED; |
2f77fc4b DG |
2047 | goto error; |
2048 | } | |
2049 | ||
2f77fc4b | 2050 | /* Kernel tracer */ |
14fb1ebe | 2051 | if (ksession && ksession->active) { |
2f77fc4b DG |
2052 | DBG("Stop kernel tracing"); |
2053 | ||
2054 | /* Flush metadata if exist */ | |
2055 | if (ksession->metadata_stream_fd >= 0) { | |
2056 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2057 | if (ret < 0) { | |
2058 | ERR("Kernel metadata flush failed"); | |
2059 | } | |
2060 | } | |
2061 | ||
2062 | /* Flush all buffers before stopping */ | |
2063 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2064 | ret = kernel_flush_buffer(kchan); | |
2065 | if (ret < 0) { | |
2066 | ERR("Kernel flush buffer error"); | |
2067 | } | |
2068 | } | |
2069 | ||
2070 | ret = kernel_stop_session(ksession); | |
2071 | if (ret < 0) { | |
f73fabfd | 2072 | ret = LTTNG_ERR_KERN_STOP_FAIL; |
2f77fc4b DG |
2073 | goto error; |
2074 | } | |
2075 | ||
2076 | kernel_wait_quiescent(kernel_tracer_fd); | |
9b6c7ec5 | 2077 | |
14fb1ebe | 2078 | ksession->active = 0; |
2f77fc4b DG |
2079 | } |
2080 | ||
14fb1ebe DG |
2081 | if (usess && usess->active) { |
2082 | /* | |
2083 | * Even though the stop trace might fail, flag this session inactive so | |
2084 | * other application coming in are not started by default. | |
2085 | */ | |
2086 | usess->active = 0; | |
2f77fc4b DG |
2087 | |
2088 | ret = ust_app_stop_trace_all(usess); | |
2089 | if (ret < 0) { | |
f73fabfd | 2090 | ret = LTTNG_ERR_UST_STOP_FAIL; |
2f77fc4b DG |
2091 | goto error; |
2092 | } | |
2093 | } | |
2094 | ||
8382cf6f DG |
2095 | /* Flag inactive after a successful stop. */ |
2096 | session->active = 0; | |
f73fabfd | 2097 | ret = LTTNG_OK; |
2f77fc4b DG |
2098 | |
2099 | error: | |
2100 | return ret; | |
2101 | } | |
2102 | ||
2103 | /* | |
2104 | * Command LTTNG_SET_CONSUMER_URI processed by the client thread. | |
2105 | */ | |
bda32d56 JG |
2106 | int cmd_set_consumer_uri(struct ltt_session *session, size_t nb_uri, |
2107 | struct lttng_uri *uris) | |
2f77fc4b DG |
2108 | { |
2109 | int ret, i; | |
2110 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2111 | struct ltt_ust_session *usess = session->ust_session; | |
2f77fc4b DG |
2112 | |
2113 | assert(session); | |
2114 | assert(uris); | |
2115 | assert(nb_uri > 0); | |
2116 | ||
8382cf6f DG |
2117 | /* Can't set consumer URI if the session is active. */ |
2118 | if (session->active) { | |
f73fabfd | 2119 | ret = LTTNG_ERR_TRACE_ALREADY_STARTED; |
2f77fc4b DG |
2120 | goto error; |
2121 | } | |
2122 | ||
bda32d56 | 2123 | /* Set the "global" consumer URIs */ |
2f77fc4b | 2124 | for (i = 0; i < nb_uri; i++) { |
bda32d56 JG |
2125 | ret = add_uri_to_consumer(session->consumer, |
2126 | &uris[i], 0, session->name); | |
a74934ba | 2127 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2128 | goto error; |
2129 | } | |
2f77fc4b DG |
2130 | } |
2131 | ||
bda32d56 JG |
2132 | /* Set UST session URIs */ |
2133 | if (session->ust_session) { | |
2134 | for (i = 0; i < nb_uri; i++) { | |
2135 | ret = add_uri_to_consumer( | |
2136 | session->ust_session->consumer, | |
2137 | &uris[i], LTTNG_DOMAIN_UST, | |
2138 | session->name); | |
2139 | if (ret != LTTNG_OK) { | |
2140 | goto error; | |
2141 | } | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | /* Set kernel session URIs */ | |
2146 | if (session->kernel_session) { | |
2147 | for (i = 0; i < nb_uri; i++) { | |
2148 | ret = add_uri_to_consumer( | |
2149 | session->kernel_session->consumer, | |
2150 | &uris[i], LTTNG_DOMAIN_KERNEL, | |
2151 | session->name); | |
2152 | if (ret != LTTNG_OK) { | |
2153 | goto error; | |
2154 | } | |
2155 | } | |
2156 | } | |
2157 | ||
7ab70fe0 DG |
2158 | /* |
2159 | * Make sure to set the session in output mode after we set URI since a | |
2160 | * session can be created without URL (thus flagged in no output mode). | |
2161 | */ | |
2162 | session->output_traces = 1; | |
2163 | if (ksess) { | |
2164 | ksess->output_traces = 1; | |
bda32d56 JG |
2165 | } |
2166 | ||
2167 | if (usess) { | |
7ab70fe0 DG |
2168 | usess->output_traces = 1; |
2169 | } | |
2170 | ||
2f77fc4b | 2171 | /* All good! */ |
f73fabfd | 2172 | ret = LTTNG_OK; |
2f77fc4b DG |
2173 | |
2174 | error: | |
2175 | return ret; | |
2176 | } | |
2177 | ||
2178 | /* | |
2179 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2180 | */ | |
2181 | int cmd_create_session_uri(char *name, struct lttng_uri *uris, | |
ecc48a90 | 2182 | size_t nb_uri, lttng_sock_cred *creds, unsigned int live_timer) |
2f77fc4b DG |
2183 | { |
2184 | int ret; | |
2f77fc4b DG |
2185 | struct ltt_session *session; |
2186 | ||
2187 | assert(name); | |
2bba9e53 | 2188 | assert(creds); |
785d2d0d | 2189 | |
2f77fc4b DG |
2190 | /* |
2191 | * Verify if the session already exist | |
2192 | * | |
2193 | * XXX: There is no need for the session lock list here since the caller | |
2194 | * (process_client_msg) is holding it. We might want to change that so a | |
2195 | * single command does not lock the entire session list. | |
2196 | */ | |
2197 | session = session_find_by_name(name); | |
2198 | if (session != NULL) { | |
f73fabfd | 2199 | ret = LTTNG_ERR_EXIST_SESS; |
2f77fc4b DG |
2200 | goto find_error; |
2201 | } | |
2202 | ||
2203 | /* Create tracing session in the registry */ | |
dec56f6c | 2204 | ret = session_create(name, LTTNG_SOCK_GET_UID_CRED(creds), |
2f77fc4b | 2205 | LTTNG_SOCK_GET_GID_CRED(creds)); |
f73fabfd | 2206 | if (ret != LTTNG_OK) { |
2f77fc4b DG |
2207 | goto session_error; |
2208 | } | |
2209 | ||
2210 | /* | |
2211 | * Get the newly created session pointer back | |
2212 | * | |
2213 | * XXX: There is no need for the session lock list here since the caller | |
2214 | * (process_client_msg) is holding it. We might want to change that so a | |
2215 | * single command does not lock the entire session list. | |
2216 | */ | |
2217 | session = session_find_by_name(name); | |
2218 | assert(session); | |
2219 | ||
ecc48a90 | 2220 | session->live_timer = live_timer; |
2f77fc4b DG |
2221 | /* Create default consumer output for the session not yet created. */ |
2222 | session->consumer = consumer_create_output(CONSUMER_DST_LOCAL); | |
2223 | if (session->consumer == NULL) { | |
f73fabfd | 2224 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2225 | goto consumer_error; |
2226 | } | |
2227 | ||
2bba9e53 | 2228 | if (uris) { |
bda32d56 | 2229 | ret = cmd_set_consumer_uri(session, nb_uri, uris); |
2bba9e53 DG |
2230 | if (ret != LTTNG_OK) { |
2231 | goto consumer_error; | |
2232 | } | |
2233 | session->output_traces = 1; | |
2234 | } else { | |
2235 | session->output_traces = 0; | |
2236 | DBG2("Session %s created with no output", session->name); | |
2f77fc4b DG |
2237 | } |
2238 | ||
2239 | session->consumer->enabled = 1; | |
2240 | ||
f73fabfd | 2241 | return LTTNG_OK; |
2f77fc4b DG |
2242 | |
2243 | consumer_error: | |
2244 | session_destroy(session); | |
2245 | session_error: | |
2246 | find_error: | |
2247 | return ret; | |
2248 | } | |
2249 | ||
27babd3a DG |
2250 | /* |
2251 | * Command LTTNG_CREATE_SESSION_SNAPSHOT processed by the client thread. | |
2252 | */ | |
2253 | int cmd_create_session_snapshot(char *name, struct lttng_uri *uris, | |
2254 | size_t nb_uri, lttng_sock_cred *creds) | |
2255 | { | |
2256 | int ret; | |
2257 | struct ltt_session *session; | |
2258 | struct snapshot_output *new_output = NULL; | |
2259 | ||
2260 | assert(name); | |
2261 | assert(creds); | |
2262 | ||
2263 | /* | |
2264 | * Create session in no output mode with URIs set to NULL. The uris we've | |
2265 | * received are for a default snapshot output if one. | |
2266 | */ | |
ecc48a90 | 2267 | ret = cmd_create_session_uri(name, NULL, 0, creds, -1); |
27babd3a DG |
2268 | if (ret != LTTNG_OK) { |
2269 | goto error; | |
2270 | } | |
2271 | ||
2272 | /* Get the newly created session pointer back. This should NEVER fail. */ | |
2273 | session = session_find_by_name(name); | |
2274 | assert(session); | |
2275 | ||
2276 | /* Flag session for snapshot mode. */ | |
2277 | session->snapshot_mode = 1; | |
2278 | ||
2279 | /* Skip snapshot output creation if no URI is given. */ | |
2280 | if (nb_uri == 0) { | |
2281 | goto end; | |
2282 | } | |
2283 | ||
2284 | new_output = snapshot_output_alloc(); | |
2285 | if (!new_output) { | |
2286 | ret = LTTNG_ERR_NOMEM; | |
2287 | goto error_snapshot_alloc; | |
2288 | } | |
2289 | ||
2290 | ret = snapshot_output_init_with_uri(DEFAULT_SNAPSHOT_MAX_SIZE, NULL, | |
2291 | uris, nb_uri, session->consumer, new_output, &session->snapshot); | |
2292 | if (ret < 0) { | |
2293 | if (ret == -ENOMEM) { | |
2294 | ret = LTTNG_ERR_NOMEM; | |
2295 | } else { | |
2296 | ret = LTTNG_ERR_INVALID; | |
2297 | } | |
2298 | goto error_snapshot; | |
2299 | } | |
2300 | ||
2301 | rcu_read_lock(); | |
2302 | snapshot_add_output(&session->snapshot, new_output); | |
2303 | rcu_read_unlock(); | |
2304 | ||
2305 | end: | |
2306 | return LTTNG_OK; | |
2307 | ||
2308 | error_snapshot: | |
2309 | snapshot_output_destroy(new_output); | |
2310 | error_snapshot_alloc: | |
2311 | session_destroy(session); | |
2312 | error: | |
2313 | return ret; | |
2314 | } | |
2315 | ||
2f77fc4b DG |
2316 | /* |
2317 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2318 | */ | |
2319 | int cmd_destroy_session(struct ltt_session *session, int wpipe) | |
2320 | { | |
2321 | int ret; | |
2322 | struct ltt_ust_session *usess; | |
2323 | struct ltt_kernel_session *ksess; | |
2324 | ||
2325 | /* Safety net */ | |
2326 | assert(session); | |
2327 | ||
2328 | usess = session->ust_session; | |
2329 | ksess = session->kernel_session; | |
2330 | ||
2331 | /* Clean kernel session teardown */ | |
2332 | kernel_destroy_session(ksess); | |
2333 | ||
2334 | /* UST session teardown */ | |
2335 | if (usess) { | |
2336 | /* Close any relayd session */ | |
2337 | consumer_output_send_destroy_relayd(usess->consumer); | |
2338 | ||
2339 | /* Destroy every UST application related to this session. */ | |
2340 | ret = ust_app_destroy_trace_all(usess); | |
2341 | if (ret) { | |
2342 | ERR("Error in ust_app_destroy_trace_all"); | |
2343 | } | |
2344 | ||
2345 | /* Clean up the rest. */ | |
2346 | trace_ust_destroy_session(usess); | |
2347 | } | |
2348 | ||
2349 | /* | |
2350 | * Must notify the kernel thread here to update it's poll set in order to | |
2351 | * remove the channel(s)' fd just destroyed. | |
2352 | */ | |
2353 | ret = notify_thread_pipe(wpipe); | |
2354 | if (ret < 0) { | |
2355 | PERROR("write kernel poll pipe"); | |
2356 | } | |
2357 | ||
2358 | ret = session_destroy(session); | |
2359 | ||
2360 | return ret; | |
2361 | } | |
2362 | ||
2363 | /* | |
2364 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2365 | */ | |
2366 | int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2367 | { | |
2368 | int ret; | |
2369 | ||
2370 | switch (domain) { | |
2371 | case LTTNG_DOMAIN_KERNEL: | |
2372 | { | |
2373 | struct lttng_kernel_calibrate kcalibrate; | |
2374 | ||
2e84128e DG |
2375 | switch (calibrate->type) { |
2376 | case LTTNG_CALIBRATE_FUNCTION: | |
2377 | default: | |
2378 | /* Default and only possible calibrate option. */ | |
2379 | kcalibrate.type = LTTNG_KERNEL_CALIBRATE_KRETPROBE; | |
2380 | break; | |
2381 | } | |
2382 | ||
2f77fc4b DG |
2383 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); |
2384 | if (ret < 0) { | |
f73fabfd | 2385 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
2f77fc4b DG |
2386 | goto error; |
2387 | } | |
2388 | break; | |
2389 | } | |
2390 | case LTTNG_DOMAIN_UST: | |
2391 | { | |
2392 | struct lttng_ust_calibrate ucalibrate; | |
2393 | ||
2e84128e DG |
2394 | switch (calibrate->type) { |
2395 | case LTTNG_CALIBRATE_FUNCTION: | |
2396 | default: | |
2397 | /* Default and only possible calibrate option. */ | |
2398 | ucalibrate.type = LTTNG_UST_CALIBRATE_TRACEPOINT; | |
2399 | break; | |
2400 | } | |
2401 | ||
2f77fc4b DG |
2402 | ret = ust_app_calibrate_glb(&ucalibrate); |
2403 | if (ret < 0) { | |
f73fabfd | 2404 | ret = LTTNG_ERR_UST_CALIBRATE_FAIL; |
2f77fc4b DG |
2405 | goto error; |
2406 | } | |
2407 | break; | |
2408 | } | |
2409 | default: | |
f73fabfd | 2410 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2411 | goto error; |
2412 | } | |
2413 | ||
f73fabfd | 2414 | ret = LTTNG_OK; |
2f77fc4b DG |
2415 | |
2416 | error: | |
2417 | return ret; | |
2418 | } | |
2419 | ||
2420 | /* | |
2421 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2422 | */ | |
2423 | int cmd_register_consumer(struct ltt_session *session, int domain, | |
2424 | const char *sock_path, struct consumer_data *cdata) | |
2425 | { | |
2426 | int ret, sock; | |
dd81b457 | 2427 | struct consumer_socket *socket = NULL; |
2f77fc4b DG |
2428 | |
2429 | assert(session); | |
2430 | assert(cdata); | |
2431 | assert(sock_path); | |
2432 | ||
2433 | switch (domain) { | |
2434 | case LTTNG_DOMAIN_KERNEL: | |
2435 | { | |
2436 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2437 | ||
2438 | assert(ksess); | |
2439 | ||
2440 | /* Can't register a consumer if there is already one */ | |
2441 | if (ksess->consumer_fds_sent != 0) { | |
f73fabfd | 2442 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
2f77fc4b DG |
2443 | goto error; |
2444 | } | |
2445 | ||
2446 | sock = lttcomm_connect_unix_sock(sock_path); | |
2447 | if (sock < 0) { | |
f73fabfd | 2448 | ret = LTTNG_ERR_CONNECT_FAIL; |
2f77fc4b DG |
2449 | goto error; |
2450 | } | |
4ce514c4 | 2451 | cdata->cmd_sock = sock; |
2f77fc4b | 2452 | |
4ce514c4 | 2453 | socket = consumer_allocate_socket(&cdata->cmd_sock); |
2f77fc4b | 2454 | if (socket == NULL) { |
f66c074c DG |
2455 | ret = close(sock); |
2456 | if (ret < 0) { | |
2457 | PERROR("close register consumer"); | |
2458 | } | |
4ce514c4 | 2459 | cdata->cmd_sock = -1; |
f73fabfd | 2460 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2461 | goto error; |
2462 | } | |
2463 | ||
2464 | socket->lock = zmalloc(sizeof(pthread_mutex_t)); | |
2465 | if (socket->lock == NULL) { | |
2466 | PERROR("zmalloc pthread mutex"); | |
f73fabfd | 2467 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2468 | goto error; |
2469 | } | |
2470 | pthread_mutex_init(socket->lock, NULL); | |
2471 | socket->registered = 1; | |
2472 | ||
2473 | rcu_read_lock(); | |
2474 | consumer_add_socket(socket, ksess->consumer); | |
2475 | rcu_read_unlock(); | |
2476 | ||
2477 | pthread_mutex_lock(&cdata->pid_mutex); | |
2478 | cdata->pid = -1; | |
2479 | pthread_mutex_unlock(&cdata->pid_mutex); | |
2480 | ||
2481 | break; | |
2482 | } | |
2483 | default: | |
2484 | /* TODO: Userspace tracing */ | |
f73fabfd | 2485 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2486 | goto error; |
2487 | } | |
2488 | ||
dd81b457 | 2489 | return LTTNG_OK; |
2f77fc4b DG |
2490 | |
2491 | error: | |
dd81b457 DG |
2492 | if (socket) { |
2493 | consumer_destroy_socket(socket); | |
2494 | } | |
2f77fc4b DG |
2495 | return ret; |
2496 | } | |
2497 | ||
2498 | /* | |
2499 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2500 | */ | |
2501 | ssize_t cmd_list_domains(struct ltt_session *session, | |
2502 | struct lttng_domain **domains) | |
2503 | { | |
2504 | int ret, index = 0; | |
2505 | ssize_t nb_dom = 0; | |
fefd409b DG |
2506 | struct agent *agt; |
2507 | struct lttng_ht_iter iter; | |
2f77fc4b DG |
2508 | |
2509 | if (session->kernel_session != NULL) { | |
2510 | DBG3("Listing domains found kernel domain"); | |
2511 | nb_dom++; | |
2512 | } | |
2513 | ||
2514 | if (session->ust_session != NULL) { | |
2515 | DBG3("Listing domains found UST global domain"); | |
2516 | nb_dom++; | |
3c6a091f | 2517 | |
e0a74f01 | 2518 | rcu_read_lock(); |
fefd409b DG |
2519 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2520 | agt, node.node) { | |
2521 | if (agt->being_used) { | |
2522 | nb_dom++; | |
2523 | } | |
3c6a091f | 2524 | } |
e0a74f01 | 2525 | rcu_read_unlock(); |
2f77fc4b DG |
2526 | } |
2527 | ||
fa64dfb4 JG |
2528 | if (!nb_dom) { |
2529 | goto end; | |
2530 | } | |
2531 | ||
2f77fc4b DG |
2532 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
2533 | if (*domains == NULL) { | |
f73fabfd | 2534 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2535 | goto error; |
2536 | } | |
2537 | ||
2538 | if (session->kernel_session != NULL) { | |
2539 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
2540 | index++; | |
2541 | } | |
2542 | ||
2543 | if (session->ust_session != NULL) { | |
2544 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
88c5f0d8 | 2545 | (*domains)[index].buf_type = session->ust_session->buffer_type; |
2f77fc4b | 2546 | index++; |
3c6a091f | 2547 | |
e0a74f01 | 2548 | rcu_read_lock(); |
fefd409b DG |
2549 | cds_lfht_for_each_entry(session->ust_session->agents->ht, &iter.iter, |
2550 | agt, node.node) { | |
2551 | if (agt->being_used) { | |
2552 | (*domains)[index].type = agt->domain; | |
2553 | (*domains)[index].buf_type = session->ust_session->buffer_type; | |
2554 | index++; | |
2555 | } | |
3c6a091f | 2556 | } |
e0a74f01 | 2557 | rcu_read_unlock(); |
2f77fc4b | 2558 | } |
fa64dfb4 | 2559 | end: |
2f77fc4b DG |
2560 | return nb_dom; |
2561 | ||
2562 | error: | |
f73fabfd DG |
2563 | /* Return negative value to differentiate return code */ |
2564 | return -ret; | |
2f77fc4b DG |
2565 | } |
2566 | ||
2567 | ||
2568 | /* | |
2569 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2570 | */ | |
2571 | ssize_t cmd_list_channels(int domain, struct ltt_session *session, | |
2572 | struct lttng_channel **channels) | |
2573 | { | |
2574 | int ret; | |
2575 | ssize_t nb_chan = 0; | |
2576 | ||
2577 | switch (domain) { | |
2578 | case LTTNG_DOMAIN_KERNEL: | |
2579 | if (session->kernel_session != NULL) { | |
2580 | nb_chan = session->kernel_session->channel_count; | |
2581 | } | |
2582 | DBG3("Number of kernel channels %zd", nb_chan); | |
c7d620a2 DG |
2583 | if (nb_chan <= 0) { |
2584 | ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND; | |
2585 | } | |
2f77fc4b DG |
2586 | break; |
2587 | case LTTNG_DOMAIN_UST: | |
2588 | if (session->ust_session != NULL) { | |
7ffc31a2 | 2589 | rcu_read_lock(); |
2f77fc4b | 2590 | nb_chan = lttng_ht_get_count( |
7ffc31a2 JG |
2591 | session->ust_session->domain_global.channels); |
2592 | rcu_read_unlock(); | |
2f77fc4b DG |
2593 | } |
2594 | DBG3("Number of UST global channels %zd", nb_chan); | |
ade7ce52 | 2595 | if (nb_chan < 0) { |
c7d620a2 | 2596 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
ade7ce52 | 2597 | goto error; |
c7d620a2 | 2598 | } |
2f77fc4b DG |
2599 | break; |
2600 | default: | |
f73fabfd | 2601 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2602 | goto error; |
2603 | } | |
2604 | ||
2605 | if (nb_chan > 0) { | |
2606 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
2607 | if (*channels == NULL) { | |
f73fabfd | 2608 | ret = LTTNG_ERR_FATAL; |
2f77fc4b DG |
2609 | goto error; |
2610 | } | |
2611 | ||
2612 | list_lttng_channels(domain, session, *channels); | |
2f77fc4b DG |
2613 | } |
2614 | ||
2615 | return nb_chan; | |
2616 | ||
2617 | error: | |
f73fabfd DG |
2618 | /* Return negative value to differentiate return code */ |
2619 | return -ret; | |
2f77fc4b DG |
2620 | } |
2621 | ||
2622 | /* | |
2623 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
2624 | */ | |
2625 | ssize_t cmd_list_events(int domain, struct ltt_session *session, | |
2626 | char *channel_name, struct lttng_event **events) | |
2627 | { | |
2628 | int ret = 0; | |
2629 | ssize_t nb_event = 0; | |
2630 | ||
2631 | switch (domain) { | |
2632 | case LTTNG_DOMAIN_KERNEL: | |
2633 | if (session->kernel_session != NULL) { | |
2634 | nb_event = list_lttng_kernel_events(channel_name, | |
2635 | session->kernel_session, events); | |
2636 | } | |
2637 | break; | |
2638 | case LTTNG_DOMAIN_UST: | |
2639 | { | |
2640 | if (session->ust_session != NULL) { | |
2641 | nb_event = list_lttng_ust_global_events(channel_name, | |
2642 | &session->ust_session->domain_global, events); | |
2643 | } | |
2644 | break; | |
2645 | } | |
5cdb6027 | 2646 | case LTTNG_DOMAIN_LOG4J: |
3c6a091f | 2647 | case LTTNG_DOMAIN_JUL: |
0e115563 | 2648 | case LTTNG_DOMAIN_PYTHON: |
3c6a091f | 2649 | if (session->ust_session) { |
fefd409b DG |
2650 | struct lttng_ht_iter iter; |
2651 | struct agent *agt; | |
2652 | ||
b11feea5 | 2653 | rcu_read_lock(); |
fefd409b DG |
2654 | cds_lfht_for_each_entry(session->ust_session->agents->ht, |
2655 | &iter.iter, agt, node.node) { | |
2656 | nb_event = list_lttng_agent_events(agt, events); | |
2657 | } | |
b11feea5 | 2658 | rcu_read_unlock(); |
3c6a091f DG |
2659 | } |
2660 | break; | |
2f77fc4b | 2661 | default: |
f73fabfd | 2662 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2663 | goto error; |
2664 | } | |
2665 | ||
f73fabfd | 2666 | return nb_event; |
2f77fc4b DG |
2667 | |
2668 | error: | |
f73fabfd DG |
2669 | /* Return negative value to differentiate return code */ |
2670 | return -ret; | |
2f77fc4b DG |
2671 | } |
2672 | ||
2673 | /* | |
2674 | * Using the session list, filled a lttng_session array to send back to the | |
2675 | * client for session listing. | |
2676 | * | |
2677 | * The session list lock MUST be acquired before calling this function. Use | |
2678 | * session_lock_list() and session_unlock_list(). | |
2679 | */ | |
2680 | void cmd_list_lttng_sessions(struct lttng_session *sessions, uid_t uid, | |
2681 | gid_t gid) | |
2682 | { | |
2683 | int ret; | |
2684 | unsigned int i = 0; | |
2685 | struct ltt_session *session; | |
2686 | struct ltt_session_list *list = session_get_list(); | |
2687 | ||
2688 | DBG("Getting all available session for UID %d GID %d", | |
2689 | uid, gid); | |
2690 | /* | |
2691 | * Iterate over session list and append data after the control struct in | |
2692 | * the buffer. | |
2693 | */ | |
2694 | cds_list_for_each_entry(session, &list->head, list) { | |
2695 | /* | |
2696 | * Only list the sessions the user can control. | |
2697 | */ | |
2698 | if (!session_access_ok(session, uid, gid)) { | |
2699 | continue; | |
2700 | } | |
2701 | ||
2702 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2703 | struct ltt_ust_session *usess = session->ust_session; | |
2704 | ||
2705 | if (session->consumer->type == CONSUMER_DST_NET || | |
2706 | (ksess && ksess->consumer->type == CONSUMER_DST_NET) || | |
2707 | (usess && usess->consumer->type == CONSUMER_DST_NET)) { | |
2708 | ret = build_network_session_path(sessions[i].path, | |
dec56f6c | 2709 | sizeof(sessions[i].path), session); |
2f77fc4b | 2710 | } else { |
dec56f6c | 2711 | ret = snprintf(sessions[i].path, sizeof(sessions[i].path), "%s", |
2f77fc4b DG |
2712 | session->consumer->dst.trace_path); |
2713 | } | |
2714 | if (ret < 0) { | |
2715 | PERROR("snprintf session path"); | |
2716 | continue; | |
2717 | } | |
2718 | ||
2719 | strncpy(sessions[i].name, session->name, NAME_MAX); | |
2720 | sessions[i].name[NAME_MAX - 1] = '\0'; | |
8382cf6f | 2721 | sessions[i].enabled = session->active; |
2cbf8fed | 2722 | sessions[i].snapshot_mode = session->snapshot_mode; |
8960e9cd | 2723 | sessions[i].live_timer_interval = session->live_timer; |
2f77fc4b DG |
2724 | i++; |
2725 | } | |
2726 | } | |
2727 | ||
806e2684 | 2728 | /* |
6d805429 | 2729 | * Command LTTNG_DATA_PENDING returning 0 if the data is NOT pending meaning |
d3f14b8a | 2730 | * ready for trace analysis (or any kind of reader) or else 1 for pending data. |
806e2684 | 2731 | */ |
6d805429 | 2732 | int cmd_data_pending(struct ltt_session *session) |
806e2684 DG |
2733 | { |
2734 | int ret; | |
2735 | struct ltt_kernel_session *ksess = session->kernel_session; | |
2736 | struct ltt_ust_session *usess = session->ust_session; | |
2737 | ||
2738 | assert(session); | |
2739 | ||
2740 | /* Session MUST be stopped to ask for data availability. */ | |
8382cf6f | 2741 | if (session->active) { |
806e2684 DG |
2742 | ret = LTTNG_ERR_SESSION_STARTED; |
2743 | goto error; | |
3a89d11a DG |
2744 | } else { |
2745 | /* | |
2746 | * If stopped, just make sure we've started before else the above call | |
2747 | * will always send that there is data pending. | |
2748 | * | |
2749 | * The consumer assumes that when the data pending command is received, | |
2750 | * the trace has been started before or else no output data is written | |
2751 | * by the streams which is a condition for data pending. So, this is | |
2752 | * *VERY* important that we don't ask the consumer before a start | |
2753 | * trace. | |
2754 | */ | |
8382cf6f | 2755 | if (!session->has_been_started) { |
3a89d11a DG |
2756 | ret = 0; |
2757 | goto error; | |
2758 | } | |
806e2684 DG |
2759 | } |
2760 | ||
2761 | if (ksess && ksess->consumer) { | |
6d805429 DG |
2762 | ret = consumer_is_data_pending(ksess->id, ksess->consumer); |
2763 | if (ret == 1) { | |
806e2684 DG |
2764 | /* Data is still being extracted for the kernel. */ |
2765 | goto error; | |
2766 | } | |
2767 | } | |
2768 | ||
2769 | if (usess && usess->consumer) { | |
6d805429 DG |
2770 | ret = consumer_is_data_pending(usess->id, usess->consumer); |
2771 | if (ret == 1) { | |
806e2684 DG |
2772 | /* Data is still being extracted for the kernel. */ |
2773 | goto error; | |
2774 | } | |
2775 | } | |
2776 | ||
2777 | /* Data is ready to be read by a viewer */ | |
6d805429 | 2778 | ret = 0; |
806e2684 DG |
2779 | |
2780 | error: | |
2781 | return ret; | |
2782 | } | |
2783 | ||
6dc3064a DG |
2784 | /* |
2785 | * Command LTTNG_SNAPSHOT_ADD_OUTPUT from the lttng ctl library. | |
2786 | * | |
2787 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2788 | */ | |
2789 | int cmd_snapshot_add_output(struct ltt_session *session, | |
2790 | struct lttng_snapshot_output *output, uint32_t *id) | |
2791 | { | |
2792 | int ret; | |
2793 | struct snapshot_output *new_output; | |
2794 | ||
2795 | assert(session); | |
2796 | assert(output); | |
2797 | ||
2798 | DBG("Cmd snapshot add output for session %s", session->name); | |
2799 | ||
2800 | /* | |
d3f14b8a MD |
2801 | * Permission denied to create an output if the session is not |
2802 | * set in no output mode. | |
6dc3064a DG |
2803 | */ |
2804 | if (session->output_traces) { | |
2805 | ret = LTTNG_ERR_EPERM; | |
2806 | goto error; | |
2807 | } | |
2808 | ||
2809 | /* Only one output is allowed until we have the "tee" feature. */ | |
2810 | if (session->snapshot.nb_output == 1) { | |
2811 | ret = LTTNG_ERR_SNAPSHOT_OUTPUT_EXIST; | |
2812 | goto error; | |
2813 | } | |
2814 | ||
2815 | new_output = snapshot_output_alloc(); | |
2816 | if (!new_output) { | |
2817 | ret = LTTNG_ERR_NOMEM; | |
2818 | goto error; | |
2819 | } | |
2820 | ||
2821 | ret = snapshot_output_init(output->max_size, output->name, | |
2822 | output->ctrl_url, output->data_url, session->consumer, new_output, | |
2823 | &session->snapshot); | |
2824 | if (ret < 0) { | |
2825 | if (ret == -ENOMEM) { | |
2826 | ret = LTTNG_ERR_NOMEM; | |
2827 | } else { | |
2828 | ret = LTTNG_ERR_INVALID; | |
2829 | } | |
2830 | goto free_error; | |
2831 | } | |
2832 | ||
6dc3064a DG |
2833 | rcu_read_lock(); |
2834 | snapshot_add_output(&session->snapshot, new_output); | |
2835 | if (id) { | |
2836 | *id = new_output->id; | |
2837 | } | |
2838 | rcu_read_unlock(); | |
2839 | ||
2840 | return LTTNG_OK; | |
2841 | ||
2842 | free_error: | |
2843 | snapshot_output_destroy(new_output); | |
2844 | error: | |
2845 | return ret; | |
2846 | } | |
2847 | ||
2848 | /* | |
2849 | * Command LTTNG_SNAPSHOT_DEL_OUTPUT from lib lttng ctl. | |
2850 | * | |
2851 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
2852 | */ | |
2853 | int cmd_snapshot_del_output(struct ltt_session *session, | |
2854 | struct lttng_snapshot_output *output) | |
2855 | { | |
2856 | int ret; | |
eb240553 | 2857 | struct snapshot_output *sout = NULL; |
6dc3064a DG |
2858 | |
2859 | assert(session); | |
2860 | assert(output); | |
2861 | ||
6dc3064a DG |
2862 | rcu_read_lock(); |
2863 | ||
2864 | /* | |
d3f14b8a MD |
2865 | * Permission denied to create an output if the session is not |
2866 | * set in no output mode. | |
6dc3064a DG |
2867 | */ |
2868 | if (session->output_traces) { | |
2869 | ret = LTTNG_ERR_EPERM; | |
2870 | goto error; | |
2871 | } | |
2872 | ||
eb240553 DG |
2873 | if (output->id) { |
2874 | DBG("Cmd snapshot del output id %" PRIu32 " for session %s", output->id, | |
2875 | session->name); | |
2876 | sout = snapshot_find_output_by_id(output->id, &session->snapshot); | |
2877 | } else if (*output->name != '\0') { | |
2878 | DBG("Cmd snapshot del output name %s for session %s", output->name, | |
2879 | session->name); | |
2880 | sout = snapshot_find_output_by_name(output->name, &session->snapshot); | |
2881 | } | |
6dc3064a DG |
2882 | if (!sout) { |
2883 | ret = LTTNG_ERR_INVALID; | |
2884 | goto error; | |
2885 | } | |
2886 | ||
2887 | snapshot_delete_output(&session->snapshot, sout); | |
2888 | snapshot_output_destroy(sout); | |
2889 | ret = LTTNG_OK; | |
2890 | ||
2891 | error: | |
2892 | rcu_read_unlock(); | |
2893 | return ret; | |
2894 | } | |
2895 | ||
2896 | /* | |
2897 | * Command LTTNG_SNAPSHOT_LIST_OUTPUT from lib lttng ctl. | |
2898 | * | |
2899 | * If no output is available, outputs is untouched and 0 is returned. | |
2900 | * | |
2901 | * Return the size of the newly allocated outputs or a negative LTTNG_ERR code. | |
2902 | */ | |
2903 | ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, | |
2904 | struct lttng_snapshot_output **outputs) | |
2905 | { | |
2906 | int ret, idx = 0; | |
b223ca94 | 2907 | struct lttng_snapshot_output *list = NULL; |
6dc3064a DG |
2908 | struct lttng_ht_iter iter; |
2909 | struct snapshot_output *output; | |
2910 | ||
2911 | assert(session); | |
2912 | assert(outputs); | |
2913 | ||
2914 | DBG("Cmd snapshot list outputs for session %s", session->name); | |
2915 | ||
2916 | /* | |
d3f14b8a MD |
2917 | * Permission denied to create an output if the session is not |
2918 | * set in no output mode. | |
6dc3064a DG |
2919 | */ |
2920 | if (session->output_traces) { | |
b223ca94 | 2921 | ret = -LTTNG_ERR_EPERM; |
6dc3064a DG |
2922 | goto error; |
2923 | } | |
2924 | ||
2925 | if (session->snapshot.nb_output == 0) { | |
2926 | ret = 0; | |
2927 | goto error; | |
2928 | } | |
2929 | ||
2930 | list = zmalloc(session->snapshot.nb_output * sizeof(*list)); | |
2931 | if (!list) { | |
b223ca94 | 2932 | ret = -LTTNG_ERR_NOMEM; |
6dc3064a DG |
2933 | goto error; |
2934 | } | |
2935 | ||
2936 | /* Copy list from session to the new list object. */ | |
b223ca94 | 2937 | rcu_read_lock(); |
6dc3064a DG |
2938 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, |
2939 | output, node.node) { | |
2940 | assert(output->consumer); | |
2941 | list[idx].id = output->id; | |
2942 | list[idx].max_size = output->max_size; | |
2943 | strncpy(list[idx].name, output->name, sizeof(list[idx].name)); | |
2944 | if (output->consumer->type == CONSUMER_DST_LOCAL) { | |
2945 | strncpy(list[idx].ctrl_url, output->consumer->dst.trace_path, | |
2946 | sizeof(list[idx].ctrl_url)); | |
2947 | } else { | |
2948 | /* Control URI. */ | |
2949 | ret = uri_to_str_url(&output->consumer->dst.net.control, | |
2950 | list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); | |
2951 | if (ret < 0) { | |
b223ca94 JG |
2952 | ret = -LTTNG_ERR_NOMEM; |
2953 | goto error; | |
6dc3064a DG |
2954 | } |
2955 | ||
2956 | /* Data URI. */ | |
2957 | ret = uri_to_str_url(&output->consumer->dst.net.data, | |
2958 | list[idx].data_url, sizeof(list[idx].data_url)); | |
2959 | if (ret < 0) { | |
b223ca94 JG |
2960 | ret = -LTTNG_ERR_NOMEM; |
2961 | goto error; | |
6dc3064a DG |
2962 | } |
2963 | } | |
2964 | idx++; | |
2965 | } | |
2966 | ||
2967 | *outputs = list; | |
b223ca94 JG |
2968 | list = NULL; |
2969 | ret = session->snapshot.nb_output; | |
6dc3064a | 2970 | error: |
b223ca94 JG |
2971 | free(list); |
2972 | rcu_read_unlock(); | |
2973 | return ret; | |
6dc3064a DG |
2974 | } |
2975 | ||
2976 | /* | |
2977 | * Send relayd sockets from snapshot output to consumer. Ignore request if the | |
2978 | * snapshot output is *not* set with a remote destination. | |
2979 | * | |
a934f4af | 2980 | * Return 0 on success or a LTTNG_ERR code. |
6dc3064a DG |
2981 | */ |
2982 | static int set_relayd_for_snapshot(struct consumer_output *consumer, | |
2983 | struct snapshot_output *snap_output, struct ltt_session *session) | |
2984 | { | |
a934f4af | 2985 | int ret = LTTNG_OK; |
6dc3064a DG |
2986 | struct lttng_ht_iter iter; |
2987 | struct consumer_socket *socket; | |
2988 | ||
2989 | assert(consumer); | |
2990 | assert(snap_output); | |
2991 | assert(session); | |
2992 | ||
2993 | DBG2("Set relayd object from snapshot output"); | |
2994 | ||
2995 | /* Ignore if snapshot consumer output is not network. */ | |
2996 | if (snap_output->consumer->type != CONSUMER_DST_NET) { | |
2997 | goto error; | |
2998 | } | |
2999 | ||
3000 | /* | |
3001 | * For each consumer socket, create and send the relayd object of the | |
3002 | * snapshot output. | |
3003 | */ | |
3004 | rcu_read_lock(); | |
5eecee74 DG |
3005 | cds_lfht_for_each_entry(snap_output->consumer->socks->ht, &iter.iter, |
3006 | socket, node.node) { | |
6dc3064a | 3007 | ret = send_consumer_relayd_sockets(0, session->id, |
d3e2ba59 JD |
3008 | snap_output->consumer, socket, |
3009 | session->name, session->hostname, | |
3010 | session->live_timer); | |
a934f4af | 3011 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3012 | rcu_read_unlock(); |
3013 | goto error; | |
3014 | } | |
3015 | } | |
3016 | rcu_read_unlock(); | |
3017 | ||
3018 | error: | |
3019 | return ret; | |
3020 | } | |
3021 | ||
3022 | /* | |
3023 | * Record a kernel snapshot. | |
3024 | * | |
fac41e72 | 3025 | * Return LTTNG_OK on success or a LTTNG_ERR code. |
6dc3064a DG |
3026 | */ |
3027 | static int record_kernel_snapshot(struct ltt_kernel_session *ksess, | |
5c786ded | 3028 | struct snapshot_output *output, struct ltt_session *session, |
d07ceecd | 3029 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3030 | { |
3031 | int ret; | |
3032 | ||
3033 | assert(ksess); | |
3034 | assert(output); | |
3035 | assert(session); | |
3036 | ||
10a50311 JD |
3037 | /* Get the datetime for the snapshot output directory. */ |
3038 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
3039 | sizeof(output->datetime)); | |
3040 | if (!ret) { | |
a934f4af | 3041 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
3042 | goto error; |
3043 | } | |
3044 | ||
af706bb7 DG |
3045 | /* |
3046 | * Copy kernel session sockets so we can communicate with the right | |
3047 | * consumer for the snapshot record command. | |
3048 | */ | |
3049 | ret = consumer_copy_sockets(output->consumer, ksess->consumer); | |
3050 | if (ret < 0) { | |
a934f4af | 3051 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3052 | goto error; |
6dc3064a DG |
3053 | } |
3054 | ||
3055 | ret = set_relayd_for_snapshot(ksess->consumer, output, session); | |
a934f4af | 3056 | if (ret != LTTNG_OK) { |
af706bb7 | 3057 | goto error_snapshot; |
6dc3064a DG |
3058 | } |
3059 | ||
d07ceecd | 3060 | ret = kernel_snapshot_record(ksess, output, wait, nb_packets_per_stream); |
2a06df8d | 3061 | if (ret != LTTNG_OK) { |
af706bb7 | 3062 | goto error_snapshot; |
6dc3064a DG |
3063 | } |
3064 | ||
a934f4af | 3065 | ret = LTTNG_OK; |
1371fc12 | 3066 | goto end; |
a934f4af | 3067 | |
af706bb7 DG |
3068 | error_snapshot: |
3069 | /* Clean up copied sockets so this output can use some other later on. */ | |
3070 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a | 3071 | error: |
1371fc12 | 3072 | end: |
6dc3064a DG |
3073 | return ret; |
3074 | } | |
3075 | ||
3076 | /* | |
3077 | * Record a UST snapshot. | |
3078 | * | |
a934f4af | 3079 | * Return 0 on success or a LTTNG_ERR error code. |
6dc3064a DG |
3080 | */ |
3081 | static int record_ust_snapshot(struct ltt_ust_session *usess, | |
5c786ded | 3082 | struct snapshot_output *output, struct ltt_session *session, |
d07ceecd | 3083 | int wait, uint64_t nb_packets_per_stream) |
6dc3064a DG |
3084 | { |
3085 | int ret; | |
3086 | ||
3087 | assert(usess); | |
3088 | assert(output); | |
3089 | assert(session); | |
3090 | ||
10a50311 JD |
3091 | /* Get the datetime for the snapshot output directory. */ |
3092 | ret = utils_get_current_time_str("%Y%m%d-%H%M%S", output->datetime, | |
3093 | sizeof(output->datetime)); | |
3094 | if (!ret) { | |
a934f4af | 3095 | ret = LTTNG_ERR_INVALID; |
10a50311 JD |
3096 | goto error; |
3097 | } | |
3098 | ||
af706bb7 | 3099 | /* |
d3f14b8a | 3100 | * Copy UST session sockets so we can communicate with the right |
af706bb7 DG |
3101 | * consumer for the snapshot record command. |
3102 | */ | |
3103 | ret = consumer_copy_sockets(output->consumer, usess->consumer); | |
3104 | if (ret < 0) { | |
a934f4af | 3105 | ret = LTTNG_ERR_NOMEM; |
af706bb7 | 3106 | goto error; |
6dc3064a DG |
3107 | } |
3108 | ||
3109 | ret = set_relayd_for_snapshot(usess->consumer, output, session); | |
a934f4af | 3110 | if (ret != LTTNG_OK) { |
af706bb7 | 3111 | goto error_snapshot; |
6dc3064a DG |
3112 | } |
3113 | ||
d07ceecd | 3114 | ret = ust_app_snapshot_record(usess, output, wait, nb_packets_per_stream); |
6dc3064a | 3115 | if (ret < 0) { |
7badf927 DG |
3116 | switch (-ret) { |
3117 | case EINVAL: | |
a934f4af | 3118 | ret = LTTNG_ERR_INVALID; |
7badf927 DG |
3119 | break; |
3120 | case ENODATA: | |
3121 | ret = LTTNG_ERR_SNAPSHOT_NODATA; | |
3122 | break; | |
3123 | default: | |
3124 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
3125 | break; | |
5c786ded | 3126 | } |
af706bb7 | 3127 | goto error_snapshot; |
6dc3064a DG |
3128 | } |
3129 | ||
a934f4af DG |
3130 | ret = LTTNG_OK; |
3131 | ||
af706bb7 DG |
3132 | error_snapshot: |
3133 | /* Clean up copied sockets so this output can use some other later on. */ | |
3134 | consumer_destroy_output_sockets(output->consumer); | |
6dc3064a DG |
3135 | error: |
3136 | return ret; | |
3137 | } | |
3138 | ||
d07ceecd MD |
3139 | static |
3140 | uint64_t get_session_size_one_more_packet_per_stream(struct ltt_session *session, | |
3141 | uint64_t cur_nr_packets) | |
68808f4e | 3142 | { |
d07ceecd | 3143 | uint64_t tot_size = 0; |
68808f4e DG |
3144 | |
3145 | if (session->kernel_session) { | |
3146 | struct ltt_kernel_channel *chan; | |
3147 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3148 | ||
68808f4e | 3149 | cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { |
d07ceecd MD |
3150 | if (cur_nr_packets >= chan->channel->attr.num_subbuf) { |
3151 | /* | |
3152 | * Don't take channel into account if we | |
3153 | * already grab all its packets. | |
3154 | */ | |
3155 | continue; | |
68808f4e | 3156 | } |
d07ceecd MD |
3157 | tot_size += chan->channel->attr.subbuf_size |
3158 | * chan->stream_count; | |
68808f4e DG |
3159 | } |
3160 | } | |
3161 | ||
3162 | if (session->ust_session) { | |
68808f4e DG |
3163 | struct ltt_ust_session *usess = session->ust_session; |
3164 | ||
d07ceecd MD |
3165 | tot_size += ust_app_get_size_one_more_packet_per_stream(usess, |
3166 | cur_nr_packets); | |
68808f4e DG |
3167 | } |
3168 | ||
d07ceecd | 3169 | return tot_size; |
68808f4e DG |
3170 | } |
3171 | ||
5c786ded | 3172 | /* |
d07ceecd MD |
3173 | * Calculate the number of packets we can grab from each stream that |
3174 | * fits within the overall snapshot max size. | |
3175 | * | |
3176 | * Returns -1 on error, 0 means infinite number of packets, else > 0 is | |
3177 | * the number of packets per stream. | |
3178 | * | |
3179 | * TODO: this approach is not perfect: we consider the worse case | |
3180 | * (packet filling the sub-buffers) as an upper bound, but we could do | |
3181 | * better if we do this calculation while we actually grab the packet | |
3182 | * content: we would know how much padding we don't actually store into | |
3183 | * the file. | |
3184 | * | |
3185 | * This algorithm is currently bounded by the number of packets per | |
3186 | * stream. | |
3187 | * | |
3188 | * Since we call this algorithm before actually grabbing the data, it's | |
3189 | * an approximation: for instance, applications could appear/disappear | |
3190 | * in between this call and actually grabbing data. | |
5c786ded | 3191 | */ |
d07ceecd MD |
3192 | static |
3193 | int64_t get_session_nb_packets_per_stream(struct ltt_session *session, uint64_t max_size) | |
5c786ded | 3194 | { |
d07ceecd MD |
3195 | int64_t size_left; |
3196 | uint64_t cur_nb_packets = 0; | |
5c786ded | 3197 | |
d07ceecd MD |
3198 | if (!max_size) { |
3199 | return 0; /* Infinite */ | |
5c786ded JD |
3200 | } |
3201 | ||
d07ceecd MD |
3202 | size_left = max_size; |
3203 | for (;;) { | |
3204 | uint64_t one_more_packet_tot_size; | |
5c786ded | 3205 | |
d07ceecd MD |
3206 | one_more_packet_tot_size = get_session_size_one_more_packet_per_stream(session, |
3207 | cur_nb_packets); | |
3208 | if (!one_more_packet_tot_size) { | |
3209 | /* We are already grabbing all packets. */ | |
3210 | break; | |
3211 | } | |
3212 | size_left -= one_more_packet_tot_size; | |
3213 | if (size_left < 0) { | |
3214 | break; | |
3215 | } | |
3216 | cur_nb_packets++; | |
5c786ded | 3217 | } |
d07ceecd MD |
3218 | if (!cur_nb_packets) { |
3219 | /* Not enough room to grab one packet of each stream, error. */ | |
3220 | return -1; | |
3221 | } | |
3222 | return cur_nb_packets; | |
5c786ded JD |
3223 | } |
3224 | ||
6dc3064a DG |
3225 | /* |
3226 | * Command LTTNG_SNAPSHOT_RECORD from lib lttng ctl. | |
3227 | * | |
3228 | * The wait parameter is ignored so this call always wait for the snapshot to | |
3229 | * complete before returning. | |
3230 | * | |
3231 | * Return LTTNG_OK on success or else a LTTNG_ERR code. | |
3232 | */ | |
3233 | int cmd_snapshot_record(struct ltt_session *session, | |
3234 | struct lttng_snapshot_output *output, int wait) | |
3235 | { | |
3236 | int ret = LTTNG_OK; | |
e1986656 DG |
3237 | unsigned int use_tmp_output = 0; |
3238 | struct snapshot_output tmp_output; | |
00e1dfc4 | 3239 | unsigned int snapshot_success = 0; |
6dc3064a DG |
3240 | |
3241 | assert(session); | |
ba45d9f0 | 3242 | assert(output); |
6dc3064a DG |
3243 | |
3244 | DBG("Cmd snapshot record for session %s", session->name); | |
3245 | ||
3246 | /* | |
d3f14b8a MD |
3247 | * Permission denied to create an output if the session is not |
3248 | * set in no output mode. | |
6dc3064a DG |
3249 | */ |
3250 | if (session->output_traces) { | |
3251 | ret = LTTNG_ERR_EPERM; | |
3252 | goto error; | |
3253 | } | |
3254 | ||
3255 | /* The session needs to be started at least once. */ | |
8382cf6f | 3256 | if (!session->has_been_started) { |
6dc3064a DG |
3257 | ret = LTTNG_ERR_START_SESSION_ONCE; |
3258 | goto error; | |
3259 | } | |
3260 | ||
3261 | /* Use temporary output for the session. */ | |
ba45d9f0 | 3262 | if (*output->ctrl_url != '\0') { |
6dc3064a DG |
3263 | ret = snapshot_output_init(output->max_size, output->name, |
3264 | output->ctrl_url, output->data_url, session->consumer, | |
e1986656 | 3265 | &tmp_output, NULL); |
6dc3064a DG |
3266 | if (ret < 0) { |
3267 | if (ret == -ENOMEM) { | |
3268 | ret = LTTNG_ERR_NOMEM; | |
3269 | } else { | |
3270 | ret = LTTNG_ERR_INVALID; | |
3271 | } | |
3272 | goto error; | |
3273 | } | |
1bfe7328 DG |
3274 | /* Use the global session count for the temporary snapshot. */ |
3275 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; | |
e1986656 | 3276 | use_tmp_output = 1; |
6dc3064a DG |
3277 | } |
3278 | ||
3279 | if (session->kernel_session) { | |
3280 | struct ltt_kernel_session *ksess = session->kernel_session; | |
3281 | ||
e1986656 | 3282 | if (use_tmp_output) { |
d07ceecd MD |
3283 | int64_t nb_packets_per_stream; |
3284 | ||
3285 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
3286 | tmp_output.max_size); | |
3287 | if (nb_packets_per_stream < 0) { | |
3288 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3289 | goto error; | |
3290 | } | |
e1986656 | 3291 | ret = record_kernel_snapshot(ksess, &tmp_output, session, |
d07ceecd | 3292 | wait, nb_packets_per_stream); |
a934f4af | 3293 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3294 | goto error; |
3295 | } | |
1bfe7328 | 3296 | snapshot_success = 1; |
6dc3064a DG |
3297 | } else { |
3298 | struct snapshot_output *sout; | |
3299 | struct lttng_ht_iter iter; | |
3300 | ||
3301 | rcu_read_lock(); | |
3302 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3303 | &iter.iter, sout, node.node) { | |
d07ceecd MD |
3304 | int64_t nb_packets_per_stream; |
3305 | ||
e1986656 DG |
3306 | /* |
3307 | * Make a local copy of the output and assign the possible | |
3308 | * temporary value given by the caller. | |
3309 | */ | |
3310 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3311 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3312 | ||
e1986656 DG |
3313 | if (output->max_size != (uint64_t) -1ULL) { |
3314 | tmp_output.max_size = output->max_size; | |
3315 | } | |
3316 | ||
d07ceecd MD |
3317 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, |
3318 | tmp_output.max_size); | |
3319 | if (nb_packets_per_stream < 0) { | |
68808f4e DG |
3320 | ret = LTTNG_ERR_MAX_SIZE_INVALID; |
3321 | goto error; | |
3322 | } | |
3323 | ||
e1986656 DG |
3324 | /* Use temporary name. */ |
3325 | if (*output->name != '\0') { | |
3326 | strncpy(tmp_output.name, output->name, | |
3327 | sizeof(tmp_output.name)); | |
3328 | } | |
3329 | ||
1bfe7328 DG |
3330 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3331 | ||
e1986656 | 3332 | ret = record_kernel_snapshot(ksess, &tmp_output, |
d07ceecd | 3333 | session, wait, nb_packets_per_stream); |
a934f4af | 3334 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3335 | rcu_read_unlock(); |
3336 | goto error; | |
3337 | } | |
1bfe7328 | 3338 | snapshot_success = 1; |
6dc3064a DG |
3339 | } |
3340 | rcu_read_unlock(); | |
3341 | } | |
3342 | } | |
3343 | ||
3344 | if (session->ust_session) { | |
3345 | struct ltt_ust_session *usess = session->ust_session; | |
3346 | ||
e1986656 | 3347 | if (use_tmp_output) { |
d07ceecd MD |
3348 | int64_t nb_packets_per_stream; |
3349 | ||
3350 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, | |
3351 | tmp_output.max_size); | |
3352 | if (nb_packets_per_stream < 0) { | |
3353 | ret = LTTNG_ERR_MAX_SIZE_INVALID; | |
3354 | goto error; | |
3355 | } | |
e1986656 | 3356 | ret = record_ust_snapshot(usess, &tmp_output, session, |
d07ceecd | 3357 | wait, nb_packets_per_stream); |
a934f4af | 3358 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3359 | goto error; |
3360 | } | |
1bfe7328 | 3361 | snapshot_success = 1; |
6dc3064a DG |
3362 | } else { |
3363 | struct snapshot_output *sout; | |
3364 | struct lttng_ht_iter iter; | |
3365 | ||
3366 | rcu_read_lock(); | |
3367 | cds_lfht_for_each_entry(session->snapshot.output_ht->ht, | |
3368 | &iter.iter, sout, node.node) { | |
d07ceecd MD |
3369 | int64_t nb_packets_per_stream; |
3370 | ||
e1986656 DG |
3371 | /* |
3372 | * Make a local copy of the output and assign the possible | |
3373 | * temporary value given by the caller. | |
3374 | */ | |
3375 | memset(&tmp_output, 0, sizeof(tmp_output)); | |
3376 | memcpy(&tmp_output, sout, sizeof(tmp_output)); | |
3377 | ||
e1986656 DG |
3378 | if (output->max_size != (uint64_t) -1ULL) { |
3379 | tmp_output.max_size = output->max_size; | |
3380 | } | |
3381 | ||
d07ceecd MD |
3382 | nb_packets_per_stream = get_session_nb_packets_per_stream(session, |
3383 | tmp_output.max_size); | |
3384 | if (nb_packets_per_stream < 0) { | |
68808f4e | 3385 | ret = LTTNG_ERR_MAX_SIZE_INVALID; |
d07ceecd | 3386 | rcu_read_unlock(); |
68808f4e DG |
3387 | goto error; |
3388 | } | |
3389 | ||
e1986656 DG |
3390 | /* Use temporary name. */ |
3391 | if (*output->name != '\0') { | |
3392 | strncpy(tmp_output.name, output->name, | |
3393 | sizeof(tmp_output.name)); | |
3394 | } | |
3395 | ||
1bfe7328 DG |
3396 | tmp_output.nb_snapshot = session->snapshot.nb_snapshot; |
3397 | ||
e1986656 | 3398 | ret = record_ust_snapshot(usess, &tmp_output, session, |
d07ceecd | 3399 | wait, nb_packets_per_stream); |
a934f4af | 3400 | if (ret != LTTNG_OK) { |
6dc3064a DG |
3401 | rcu_read_unlock(); |
3402 | goto error; | |
3403 | } | |
1bfe7328 | 3404 | snapshot_success = 1; |
6dc3064a DG |
3405 | } |
3406 | rcu_read_unlock(); | |
3407 | } | |
3408 | } | |
3409 | ||
1bfe7328 DG |
3410 | if (snapshot_success) { |
3411 | session->snapshot.nb_snapshot++; | |
b67578cb MD |
3412 | } else { |
3413 | ret = LTTNG_ERR_SNAPSHOT_FAIL; | |
1bfe7328 DG |
3414 | } |
3415 | ||
6dc3064a | 3416 | error: |
6dc3064a DG |
3417 | return ret; |
3418 | } | |
3419 | ||
d7ba1388 MD |
3420 | /* |
3421 | * Command LTTNG_SET_SESSION_SHM_PATH processed by the client thread. | |
3422 | */ | |
3423 | int cmd_set_session_shm_path(struct ltt_session *session, | |
3424 | const char *shm_path) | |
3425 | { | |
3426 | /* Safety net */ | |
3427 | assert(session); | |
3428 | ||
3429 | /* | |
3430 | * Can only set shm path before session is started. | |
3431 | */ | |
3432 | if (session->has_been_started) { | |
3433 | return LTTNG_ERR_SESSION_STARTED; | |
3434 | } | |
3435 | ||
3436 | strncpy(session->shm_path, shm_path, | |
3437 | sizeof(session->shm_path)); | |
3438 | session->shm_path[sizeof(session->shm_path) - 1] = '\0'; | |
3439 | ||
3440 | return 0; | |
3441 | } | |
3442 | ||
2f77fc4b DG |
3443 | /* |
3444 | * Init command subsystem. | |
3445 | */ | |
3446 | void cmd_init(void) | |
3447 | { | |
3448 | /* | |
d88aee68 DG |
3449 | * Set network sequence index to 1 for streams to match a relayd |
3450 | * socket on the consumer side. | |
2f77fc4b | 3451 | */ |
d88aee68 DG |
3452 | pthread_mutex_lock(&relayd_net_seq_idx_lock); |
3453 | relayd_net_seq_idx = 1; | |
3454 | pthread_mutex_unlock(&relayd_net_seq_idx_lock); | |
2f77fc4b DG |
3455 | |
3456 | DBG("Command subsystem initialized"); | |
3457 | } |