Commit | Line | Data |
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f1e16794 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 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
f1e16794 DG |
19 | #include <stdio.h> |
20 | #include <stdlib.h> | |
f1e16794 DG |
21 | #include <sys/stat.h> |
22 | #include <unistd.h> | |
e1f3997a | 23 | #include <inttypes.h> |
f1e16794 DG |
24 | |
25 | #include <common/common.h> | |
26 | #include <common/defaults.h> | |
f5436bfc | 27 | #include <common/compat/string.h> |
f1e16794 | 28 | |
00e2e675 | 29 | #include "consumer.h" |
8782cc74 | 30 | #include "health-sessiond.h" |
f1e16794 | 31 | #include "kernel-consumer.h" |
e9404c27 JG |
32 | #include "notification-thread-commands.h" |
33 | #include "session.h" | |
34 | #include "lttng-sessiond.h" | |
f1e16794 | 35 | |
2bba9e53 DG |
36 | static char *create_channel_path(struct consumer_output *consumer, |
37 | uid_t uid, gid_t gid) | |
00e2e675 DG |
38 | { |
39 | int ret; | |
ffe60014 | 40 | char tmp_path[PATH_MAX]; |
2bba9e53 | 41 | char *pathname = NULL; |
00e2e675 | 42 | |
2bba9e53 | 43 | assert(consumer); |
00e2e675 | 44 | |
ffe60014 DG |
45 | /* Get the right path name destination */ |
46 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
47 | /* Set application path to the destination path */ | |
366a9222 JD |
48 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s%s", |
49 | consumer->dst.session_root_path, | |
50 | consumer->chunk_path, | |
51 | consumer->subdir); | |
ffe60014 | 52 | if (ret < 0) { |
2bba9e53 | 53 | PERROR("snprintf kernel channel path"); |
ffe60014 DG |
54 | goto error; |
55 | } | |
f5436bfc | 56 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 57 | if (!pathname) { |
f5436bfc | 58 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
59 | goto error; |
60 | } | |
ffe60014 DG |
61 | |
62 | /* Create directory */ | |
2bba9e53 | 63 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid); |
ffe60014 | 64 | if (ret < 0) { |
df5b86c8 | 65 | if (errno != EEXIST) { |
ffe60014 DG |
66 | ERR("Trace directory creation error"); |
67 | goto error; | |
68 | } | |
69 | } | |
70 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
71 | } else { | |
72 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); | |
73 | if (ret < 0) { | |
2bba9e53 | 74 | PERROR("snprintf kernel metadata path"); |
ffe60014 DG |
75 | goto error; |
76 | } | |
f5436bfc | 77 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 78 | if (!pathname) { |
f5436bfc | 79 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
80 | goto error; |
81 | } | |
ffe60014 DG |
82 | DBG3("Kernel network consumer subdir path: %s", pathname); |
83 | } | |
84 | ||
2bba9e53 DG |
85 | return pathname; |
86 | ||
87 | error: | |
88 | free(pathname); | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | /* | |
93 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
94 | */ | |
95 | int kernel_consumer_add_channel(struct consumer_socket *sock, | |
e9404c27 JG |
96 | struct ltt_kernel_channel *channel, |
97 | struct ltt_kernel_session *ksession, | |
2bba9e53 DG |
98 | unsigned int monitor) |
99 | { | |
100 | int ret; | |
101 | char *pathname; | |
102 | struct lttcomm_consumer_msg lkm; | |
103 | struct consumer_output *consumer; | |
e9404c27 JG |
104 | enum lttng_error_code status; |
105 | struct ltt_session *session; | |
106 | struct lttng_channel_extended *channel_attr_extended; | |
2bba9e53 DG |
107 | |
108 | /* Safety net */ | |
109 | assert(channel); | |
e9404c27 JG |
110 | assert(ksession); |
111 | assert(ksession->consumer); | |
2bba9e53 | 112 | |
e9404c27 JG |
113 | consumer = ksession->consumer; |
114 | channel_attr_extended = (struct lttng_channel_extended *) | |
115 | channel->channel->attr.extended.ptr; | |
2bba9e53 DG |
116 | |
117 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
118 | channel->channel->name); | |
119 | ||
120 | if (monitor) { | |
e9404c27 JG |
121 | pathname = create_channel_path(consumer, ksession->uid, |
122 | ksession->gid); | |
2bba9e53 DG |
123 | } else { |
124 | /* Empty path. */ | |
53efb85a | 125 | pathname = strdup(""); |
2bba9e53 | 126 | } |
bb3c4e70 MD |
127 | if (!pathname) { |
128 | ret = -1; | |
129 | goto error; | |
130 | } | |
2bba9e53 | 131 | |
00e2e675 DG |
132 | /* Prep channel message structure */ |
133 | consumer_init_channel_comm_msg(&lkm, | |
134 | LTTNG_CONSUMER_ADD_CHANNEL, | |
e1f3997a | 135 | channel->key, |
e9404c27 | 136 | ksession->id, |
ffe60014 | 137 | pathname, |
e9404c27 JG |
138 | ksession->uid, |
139 | ksession->gid, | |
ffe60014 | 140 | consumer->net_seq_index, |
c30aaa51 | 141 | channel->channel->name, |
ffe60014 DG |
142 | channel->stream_count, |
143 | channel->channel->attr.output, | |
1624d5b7 JD |
144 | CONSUMER_CHANNEL_TYPE_DATA, |
145 | channel->channel->attr.tracefile_size, | |
2bba9e53 | 146 | channel->channel->attr.tracefile_count, |
ecc48a90 | 147 | monitor, |
e9404c27 JG |
148 | channel->channel->attr.live_timer_interval, |
149 | channel_attr_extended->monitor_timer_interval); | |
00e2e675 | 150 | |
840cb59c | 151 | health_code_update(); |
ca03de58 | 152 | |
00e2e675 DG |
153 | ret = consumer_send_channel(sock, &lkm); |
154 | if (ret < 0) { | |
155 | goto error; | |
156 | } | |
157 | ||
840cb59c | 158 | health_code_update(); |
e9404c27 JG |
159 | rcu_read_lock(); |
160 | session = session_find_by_id(ksession->id); | |
161 | assert(session); | |
ca03de58 | 162 | |
e9404c27 JG |
163 | status = notification_thread_command_add_channel( |
164 | notification_thread_handle, session->name, | |
165 | ksession->uid, ksession->gid, | |
e1f3997a | 166 | channel->channel->name, channel->key, |
e9404c27 JG |
167 | LTTNG_DOMAIN_KERNEL, |
168 | channel->channel->attr.subbuf_size * channel->channel->attr.num_subbuf); | |
169 | rcu_read_unlock(); | |
170 | if (status != LTTNG_OK) { | |
171 | ret = -1; | |
172 | goto error; | |
173 | } | |
753873bf JR |
174 | |
175 | channel->published_to_notification_thread = true; | |
176 | ||
00e2e675 | 177 | error: |
53efb85a | 178 | free(pathname); |
00e2e675 DG |
179 | return ret; |
180 | } | |
181 | ||
182 | /* | |
183 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
9a318688 JG |
184 | * |
185 | * The consumer socket lock must be held by the caller. | |
00e2e675 | 186 | */ |
f50f23d9 | 187 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 188 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
189 | { |
190 | int ret; | |
2bba9e53 | 191 | char *pathname; |
00e2e675 | 192 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 193 | struct consumer_output *consumer; |
00e2e675 DG |
194 | |
195 | /* Safety net */ | |
196 | assert(session); | |
197 | assert(session->consumer); | |
f50f23d9 | 198 | assert(sock); |
00e2e675 DG |
199 | |
200 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
201 | ||
202 | /* Get consumer output pointer */ | |
a7d9a3e7 | 203 | consumer = session->consumer; |
00e2e675 | 204 | |
2bba9e53 DG |
205 | if (monitor) { |
206 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
00e2e675 | 207 | } else { |
2bba9e53 | 208 | /* Empty path. */ |
53efb85a | 209 | pathname = strdup(""); |
00e2e675 | 210 | } |
bb3c4e70 MD |
211 | if (!pathname) { |
212 | ret = -1; | |
213 | goto error; | |
214 | } | |
00e2e675 DG |
215 | |
216 | /* Prep channel message structure */ | |
217 | consumer_init_channel_comm_msg(&lkm, | |
218 | LTTNG_CONSUMER_ADD_CHANNEL, | |
219 | session->metadata->fd, | |
ffe60014 DG |
220 | session->id, |
221 | pathname, | |
222 | session->uid, | |
223 | session->gid, | |
224 | consumer->net_seq_index, | |
30079b6b | 225 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
226 | 1, |
227 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 228 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 229 | 0, 0, |
e9404c27 | 230 | monitor, 0, 0); |
00e2e675 | 231 | |
840cb59c | 232 | health_code_update(); |
ca03de58 | 233 | |
00e2e675 DG |
234 | ret = consumer_send_channel(sock, &lkm); |
235 | if (ret < 0) { | |
236 | goto error; | |
237 | } | |
238 | ||
840cb59c | 239 | health_code_update(); |
ca03de58 | 240 | |
00e2e675 DG |
241 | /* Prep stream message structure */ |
242 | consumer_init_stream_comm_msg(&lkm, | |
243 | LTTNG_CONSUMER_ADD_STREAM, | |
244 | session->metadata->fd, | |
245 | session->metadata_stream_fd, | |
1624d5b7 | 246 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 247 | |
840cb59c | 248 | health_code_update(); |
ca03de58 | 249 | |
00e2e675 | 250 | /* Send stream and file descriptor */ |
a7d9a3e7 | 251 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
252 | &session->metadata_stream_fd, 1); |
253 | if (ret < 0) { | |
254 | goto error; | |
255 | } | |
256 | ||
840cb59c | 257 | health_code_update(); |
ca03de58 | 258 | |
00e2e675 | 259 | error: |
53efb85a | 260 | free(pathname); |
00e2e675 DG |
261 | return ret; |
262 | } | |
263 | ||
264 | /* | |
265 | * Sending a single stream to the consumer with command ADD_STREAM. | |
266 | */ | |
f50f23d9 DG |
267 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
268 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 269 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
270 | { |
271 | int ret; | |
00e2e675 | 272 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 273 | struct consumer_output *consumer; |
00e2e675 DG |
274 | |
275 | assert(channel); | |
276 | assert(stream); | |
277 | assert(session); | |
278 | assert(session->consumer); | |
f50f23d9 | 279 | assert(sock); |
00e2e675 DG |
280 | |
281 | DBG("Sending stream %d of channel %s to kernel consumer", | |
282 | stream->fd, channel->channel->name); | |
283 | ||
284 | /* Get consumer output pointer */ | |
a7d9a3e7 | 285 | consumer = session->consumer; |
00e2e675 | 286 | |
00e2e675 | 287 | /* Prep stream consumer message */ |
ffe60014 DG |
288 | consumer_init_stream_comm_msg(&lkm, |
289 | LTTNG_CONSUMER_ADD_STREAM, | |
e1f3997a | 290 | channel->key, |
00e2e675 | 291 | stream->fd, |
ffe60014 | 292 | stream->cpu); |
00e2e675 | 293 | |
840cb59c | 294 | health_code_update(); |
ca03de58 | 295 | |
00e2e675 | 296 | /* Send stream and file descriptor */ |
a7d9a3e7 | 297 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
298 | if (ret < 0) { |
299 | goto error; | |
300 | } | |
301 | ||
840cb59c | 302 | health_code_update(); |
ca03de58 | 303 | |
00e2e675 DG |
304 | error: |
305 | return ret; | |
306 | } | |
307 | ||
a4baae1b JD |
308 | /* |
309 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
310 | */ | |
311 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
312 | struct ltt_kernel_session *session, uint64_t channel_key) | |
313 | { | |
314 | int ret; | |
315 | struct lttcomm_consumer_msg lkm; | |
316 | struct consumer_output *consumer; | |
317 | ||
318 | assert(sock); | |
319 | assert(session); | |
320 | ||
321 | DBG("Sending streams_sent"); | |
322 | /* Get consumer output pointer */ | |
323 | consumer = session->consumer; | |
324 | ||
325 | /* Prep stream consumer message */ | |
326 | consumer_init_streams_sent_comm_msg(&lkm, | |
327 | LTTNG_CONSUMER_STREAMS_SENT, | |
328 | channel_key, consumer->net_seq_index); | |
329 | ||
330 | health_code_update(); | |
331 | ||
332 | /* Send stream and file descriptor */ | |
333 | ret = consumer_send_msg(sock, &lkm); | |
334 | if (ret < 0) { | |
335 | goto error; | |
336 | } | |
337 | ||
338 | error: | |
339 | return ret; | |
340 | } | |
341 | ||
f1e16794 DG |
342 | /* |
343 | * Send all stream fds of kernel channel to the consumer. | |
9a318688 JG |
344 | * |
345 | * The consumer socket lock must be held by the caller. | |
f1e16794 | 346 | */ |
f50f23d9 | 347 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
2bba9e53 DG |
348 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
349 | unsigned int monitor) | |
f1e16794 | 350 | { |
e99f9447 | 351 | int ret = LTTNG_OK; |
f1e16794 | 352 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
353 | |
354 | /* Safety net */ | |
355 | assert(channel); | |
356 | assert(session); | |
357 | assert(session->consumer); | |
f50f23d9 | 358 | assert(sock); |
00e2e675 DG |
359 | |
360 | /* Bail out if consumer is disabled */ | |
361 | if (!session->consumer->enabled) { | |
f73fabfd | 362 | ret = LTTNG_OK; |
00e2e675 DG |
363 | goto error; |
364 | } | |
f1e16794 DG |
365 | |
366 | DBG("Sending streams of channel %s to kernel consumer", | |
367 | channel->channel->name); | |
368 | ||
e99f9447 MD |
369 | if (!channel->sent_to_consumer) { |
370 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); | |
371 | if (ret < 0) { | |
372 | goto error; | |
373 | } | |
374 | channel->sent_to_consumer = true; | |
f1e16794 DG |
375 | } |
376 | ||
377 | /* Send streams */ | |
378 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
6986ab9b | 379 | if (!stream->fd || stream->sent_to_consumer) { |
f1e16794 DG |
380 | continue; |
381 | } | |
00e2e675 DG |
382 | |
383 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
384 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
385 | monitor); | |
f1e16794 | 386 | if (ret < 0) { |
f1e16794 DG |
387 | goto error; |
388 | } | |
6986ab9b | 389 | stream->sent_to_consumer = true; |
f1e16794 DG |
390 | } |
391 | ||
f1e16794 DG |
392 | error: |
393 | return ret; | |
394 | } | |
395 | ||
396 | /* | |
397 | * Send all stream fds of the kernel session to the consumer. | |
9a318688 JG |
398 | * |
399 | * The consumer socket lock must be held by the caller. | |
f1e16794 | 400 | */ |
f50f23d9 DG |
401 | int kernel_consumer_send_session(struct consumer_socket *sock, |
402 | struct ltt_kernel_session *session) | |
f1e16794 | 403 | { |
2bba9e53 | 404 | int ret, monitor = 0; |
f1e16794 | 405 | struct ltt_kernel_channel *chan; |
f1e16794 | 406 | |
00e2e675 DG |
407 | /* Safety net */ |
408 | assert(session); | |
409 | assert(session->consumer); | |
f50f23d9 | 410 | assert(sock); |
f1e16794 | 411 | |
00e2e675 DG |
412 | /* Bail out if consumer is disabled */ |
413 | if (!session->consumer->enabled) { | |
f73fabfd | 414 | ret = LTTNG_OK; |
00e2e675 | 415 | goto error; |
f1e16794 DG |
416 | } |
417 | ||
2bba9e53 DG |
418 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
419 | if (session->output_traces) { | |
420 | monitor = 1; | |
421 | } | |
422 | ||
00e2e675 DG |
423 | DBG("Sending session stream to kernel consumer"); |
424 | ||
609af759 | 425 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 426 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 427 | if (ret < 0) { |
f1e16794 DG |
428 | goto error; |
429 | } | |
f1e16794 DG |
430 | } |
431 | ||
00e2e675 | 432 | /* Send channel and streams of it */ |
f1e16794 | 433 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bba9e53 DG |
434 | ret = kernel_consumer_send_channel_stream(sock, chan, session, |
435 | monitor); | |
f1e16794 DG |
436 | if (ret < 0) { |
437 | goto error; | |
438 | } | |
601262d6 JD |
439 | if (monitor) { |
440 | /* | |
441 | * Inform the relay that all the streams for the | |
442 | * channel were sent. | |
443 | */ | |
e1f3997a | 444 | ret = kernel_consumer_streams_sent(sock, session, chan->key); |
601262d6 JD |
445 | if (ret < 0) { |
446 | goto error; | |
447 | } | |
448 | } | |
f1e16794 DG |
449 | } |
450 | ||
00e2e675 | 451 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 452 | |
4ce9ff51 | 453 | session->consumer_fds_sent = 1; |
f1e16794 DG |
454 | return 0; |
455 | ||
456 | error: | |
457 | return ret; | |
458 | } | |
07b86b52 JD |
459 | |
460 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
461 | struct ltt_kernel_channel *channel) | |
462 | { | |
463 | int ret; | |
464 | struct lttcomm_consumer_msg msg; | |
465 | ||
466 | assert(channel); | |
467 | assert(socket); | |
07b86b52 | 468 | |
e1f3997a | 469 | DBG("Sending kernel consumer destroy channel key %" PRIu64, channel->key); |
07b86b52 | 470 | |
53efb85a | 471 | memset(&msg, 0, sizeof(msg)); |
07b86b52 | 472 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
e1f3997a | 473 | msg.u.destroy_channel.key = channel->key; |
07b86b52 JD |
474 | |
475 | pthread_mutex_lock(socket->lock); | |
476 | health_code_update(); | |
477 | ||
478 | ret = consumer_send_msg(socket, &msg); | |
479 | if (ret < 0) { | |
480 | goto error; | |
481 | } | |
482 | ||
483 | error: | |
484 | health_code_update(); | |
485 | pthread_mutex_unlock(socket->lock); | |
486 | return ret; | |
487 | } | |
488 | ||
489 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
490 | struct ltt_kernel_metadata *metadata) | |
491 | { | |
492 | int ret; | |
493 | struct lttcomm_consumer_msg msg; | |
494 | ||
495 | assert(metadata); | |
496 | assert(socket); | |
07b86b52 JD |
497 | |
498 | DBG("Sending kernel consumer destroy channel key %d", metadata->fd); | |
499 | ||
53efb85a | 500 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
501 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
502 | msg.u.destroy_channel.key = metadata->fd; | |
503 | ||
504 | pthread_mutex_lock(socket->lock); | |
505 | health_code_update(); | |
506 | ||
507 | ret = consumer_send_msg(socket, &msg); | |
508 | if (ret < 0) { | |
509 | goto error; | |
510 | } | |
511 | ||
512 | error: | |
513 | health_code_update(); | |
514 | pthread_mutex_unlock(socket->lock); | |
515 | return ret; | |
516 | } |