Commit | Line | Data |
---|---|---|
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> | |
23 | ||
24 | #include <common/common.h> | |
25 | #include <common/defaults.h> | |
f5436bfc | 26 | #include <common/compat/string.h> |
f1e16794 | 27 | |
00e2e675 | 28 | #include "consumer.h" |
8782cc74 | 29 | #include "health-sessiond.h" |
f1e16794 | 30 | #include "kernel-consumer.h" |
e9404c27 JG |
31 | #include "notification-thread-commands.h" |
32 | #include "session.h" | |
33 | #include "lttng-sessiond.h" | |
f1e16794 | 34 | |
2bba9e53 DG |
35 | static char *create_channel_path(struct consumer_output *consumer, |
36 | uid_t uid, gid_t gid) | |
00e2e675 DG |
37 | { |
38 | int ret; | |
ffe60014 | 39 | char tmp_path[PATH_MAX]; |
2bba9e53 | 40 | char *pathname = NULL; |
00e2e675 | 41 | |
2bba9e53 | 42 | assert(consumer); |
00e2e675 | 43 | |
ffe60014 DG |
44 | /* Get the right path name destination */ |
45 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
46 | /* Set application path to the destination path */ | |
dec56f6c | 47 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s", |
ffe60014 DG |
48 | consumer->dst.trace_path, consumer->subdir); |
49 | if (ret < 0) { | |
2bba9e53 | 50 | PERROR("snprintf kernel channel path"); |
ffe60014 DG |
51 | goto error; |
52 | } | |
f5436bfc | 53 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 54 | if (!pathname) { |
f5436bfc | 55 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
56 | goto error; |
57 | } | |
ffe60014 DG |
58 | |
59 | /* Create directory */ | |
2bba9e53 | 60 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid); |
ffe60014 | 61 | if (ret < 0) { |
df5b86c8 | 62 | if (errno != EEXIST) { |
ffe60014 DG |
63 | ERR("Trace directory creation error"); |
64 | goto error; | |
65 | } | |
66 | } | |
67 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
68 | } else { | |
69 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); | |
70 | if (ret < 0) { | |
2bba9e53 | 71 | PERROR("snprintf kernel metadata path"); |
ffe60014 DG |
72 | goto error; |
73 | } | |
f5436bfc | 74 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 75 | if (!pathname) { |
f5436bfc | 76 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
77 | goto error; |
78 | } | |
ffe60014 DG |
79 | DBG3("Kernel network consumer subdir path: %s", pathname); |
80 | } | |
81 | ||
2bba9e53 DG |
82 | return pathname; |
83 | ||
84 | error: | |
85 | free(pathname); | |
86 | return NULL; | |
87 | } | |
88 | ||
89 | /* | |
90 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
91 | */ | |
92 | int kernel_consumer_add_channel(struct consumer_socket *sock, | |
e9404c27 JG |
93 | struct ltt_kernel_channel *channel, |
94 | struct ltt_kernel_session *ksession, | |
2bba9e53 DG |
95 | unsigned int monitor) |
96 | { | |
97 | int ret; | |
98 | char *pathname; | |
99 | struct lttcomm_consumer_msg lkm; | |
100 | struct consumer_output *consumer; | |
e9404c27 JG |
101 | enum lttng_error_code status; |
102 | struct ltt_session *session; | |
103 | struct lttng_channel_extended *channel_attr_extended; | |
2bba9e53 DG |
104 | |
105 | /* Safety net */ | |
106 | assert(channel); | |
e9404c27 JG |
107 | assert(ksession); |
108 | assert(ksession->consumer); | |
2bba9e53 | 109 | |
e9404c27 JG |
110 | consumer = ksession->consumer; |
111 | channel_attr_extended = (struct lttng_channel_extended *) | |
112 | channel->channel->attr.extended.ptr; | |
2bba9e53 DG |
113 | |
114 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
115 | channel->channel->name); | |
116 | ||
117 | if (monitor) { | |
e9404c27 JG |
118 | pathname = create_channel_path(consumer, ksession->uid, |
119 | ksession->gid); | |
2bba9e53 DG |
120 | } else { |
121 | /* Empty path. */ | |
53efb85a | 122 | pathname = strdup(""); |
2bba9e53 | 123 | } |
bb3c4e70 MD |
124 | if (!pathname) { |
125 | ret = -1; | |
126 | goto error; | |
127 | } | |
2bba9e53 | 128 | |
00e2e675 DG |
129 | /* Prep channel message structure */ |
130 | consumer_init_channel_comm_msg(&lkm, | |
131 | LTTNG_CONSUMER_ADD_CHANNEL, | |
132 | channel->fd, | |
e9404c27 | 133 | ksession->id, |
ffe60014 | 134 | pathname, |
e9404c27 JG |
135 | ksession->uid, |
136 | ksession->gid, | |
ffe60014 | 137 | consumer->net_seq_index, |
c30aaa51 | 138 | channel->channel->name, |
ffe60014 DG |
139 | channel->stream_count, |
140 | channel->channel->attr.output, | |
1624d5b7 JD |
141 | CONSUMER_CHANNEL_TYPE_DATA, |
142 | channel->channel->attr.tracefile_size, | |
2bba9e53 | 143 | channel->channel->attr.tracefile_count, |
ecc48a90 | 144 | monitor, |
e9404c27 JG |
145 | channel->channel->attr.live_timer_interval, |
146 | channel_attr_extended->monitor_timer_interval); | |
00e2e675 | 147 | |
840cb59c | 148 | health_code_update(); |
ca03de58 | 149 | |
00e2e675 DG |
150 | ret = consumer_send_channel(sock, &lkm); |
151 | if (ret < 0) { | |
152 | goto error; | |
153 | } | |
154 | ||
840cb59c | 155 | health_code_update(); |
e9404c27 JG |
156 | rcu_read_lock(); |
157 | session = session_find_by_id(ksession->id); | |
158 | assert(session); | |
ca03de58 | 159 | |
e9404c27 JG |
160 | status = notification_thread_command_add_channel( |
161 | notification_thread_handle, session->name, | |
162 | ksession->uid, ksession->gid, | |
163 | channel->channel->name, channel->fd, | |
164 | LTTNG_DOMAIN_KERNEL, | |
165 | channel->channel->attr.subbuf_size * channel->channel->attr.num_subbuf); | |
166 | rcu_read_unlock(); | |
167 | if (status != LTTNG_OK) { | |
168 | ret = -1; | |
169 | goto error; | |
170 | } | |
753873bf JR |
171 | |
172 | channel->published_to_notification_thread = true; | |
173 | ||
00e2e675 | 174 | error: |
53efb85a | 175 | free(pathname); |
00e2e675 DG |
176 | return ret; |
177 | } | |
178 | ||
179 | /* | |
180 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
181 | */ | |
f50f23d9 | 182 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 183 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
184 | { |
185 | int ret; | |
2bba9e53 | 186 | char *pathname; |
00e2e675 | 187 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 188 | struct consumer_output *consumer; |
00e2e675 DG |
189 | |
190 | /* Safety net */ | |
191 | assert(session); | |
192 | assert(session->consumer); | |
f50f23d9 | 193 | assert(sock); |
00e2e675 DG |
194 | |
195 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
196 | ||
197 | /* Get consumer output pointer */ | |
a7d9a3e7 | 198 | consumer = session->consumer; |
00e2e675 | 199 | |
2bba9e53 DG |
200 | if (monitor) { |
201 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
00e2e675 | 202 | } else { |
2bba9e53 | 203 | /* Empty path. */ |
53efb85a | 204 | pathname = strdup(""); |
00e2e675 | 205 | } |
bb3c4e70 MD |
206 | if (!pathname) { |
207 | ret = -1; | |
208 | goto error; | |
209 | } | |
00e2e675 DG |
210 | |
211 | /* Prep channel message structure */ | |
212 | consumer_init_channel_comm_msg(&lkm, | |
213 | LTTNG_CONSUMER_ADD_CHANNEL, | |
214 | session->metadata->fd, | |
ffe60014 DG |
215 | session->id, |
216 | pathname, | |
217 | session->uid, | |
218 | session->gid, | |
219 | consumer->net_seq_index, | |
30079b6b | 220 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
221 | 1, |
222 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 223 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 224 | 0, 0, |
e9404c27 | 225 | monitor, 0, 0); |
00e2e675 | 226 | |
840cb59c | 227 | health_code_update(); |
ca03de58 | 228 | |
00e2e675 DG |
229 | ret = consumer_send_channel(sock, &lkm); |
230 | if (ret < 0) { | |
231 | goto error; | |
232 | } | |
233 | ||
840cb59c | 234 | health_code_update(); |
ca03de58 | 235 | |
00e2e675 DG |
236 | /* Prep stream message structure */ |
237 | consumer_init_stream_comm_msg(&lkm, | |
238 | LTTNG_CONSUMER_ADD_STREAM, | |
239 | session->metadata->fd, | |
240 | session->metadata_stream_fd, | |
1624d5b7 | 241 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 242 | |
840cb59c | 243 | health_code_update(); |
ca03de58 | 244 | |
00e2e675 | 245 | /* Send stream and file descriptor */ |
a7d9a3e7 | 246 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
247 | &session->metadata_stream_fd, 1); |
248 | if (ret < 0) { | |
249 | goto error; | |
250 | } | |
251 | ||
840cb59c | 252 | health_code_update(); |
ca03de58 | 253 | |
00e2e675 | 254 | error: |
53efb85a | 255 | free(pathname); |
00e2e675 DG |
256 | return ret; |
257 | } | |
258 | ||
259 | /* | |
260 | * Sending a single stream to the consumer with command ADD_STREAM. | |
261 | */ | |
f50f23d9 DG |
262 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
263 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 264 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
265 | { |
266 | int ret; | |
00e2e675 | 267 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 268 | struct consumer_output *consumer; |
00e2e675 DG |
269 | |
270 | assert(channel); | |
271 | assert(stream); | |
272 | assert(session); | |
273 | assert(session->consumer); | |
f50f23d9 | 274 | assert(sock); |
00e2e675 DG |
275 | |
276 | DBG("Sending stream %d of channel %s to kernel consumer", | |
277 | stream->fd, channel->channel->name); | |
278 | ||
279 | /* Get consumer output pointer */ | |
a7d9a3e7 | 280 | consumer = session->consumer; |
00e2e675 | 281 | |
00e2e675 | 282 | /* Prep stream consumer message */ |
ffe60014 DG |
283 | consumer_init_stream_comm_msg(&lkm, |
284 | LTTNG_CONSUMER_ADD_STREAM, | |
00e2e675 DG |
285 | channel->fd, |
286 | stream->fd, | |
ffe60014 | 287 | stream->cpu); |
00e2e675 | 288 | |
840cb59c | 289 | health_code_update(); |
ca03de58 | 290 | |
00e2e675 | 291 | /* Send stream and file descriptor */ |
a7d9a3e7 | 292 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
293 | if (ret < 0) { |
294 | goto error; | |
295 | } | |
296 | ||
840cb59c | 297 | health_code_update(); |
ca03de58 | 298 | |
00e2e675 DG |
299 | error: |
300 | return ret; | |
301 | } | |
302 | ||
a4baae1b JD |
303 | /* |
304 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
305 | */ | |
306 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
307 | struct ltt_kernel_session *session, uint64_t channel_key) | |
308 | { | |
309 | int ret; | |
310 | struct lttcomm_consumer_msg lkm; | |
311 | struct consumer_output *consumer; | |
312 | ||
313 | assert(sock); | |
314 | assert(session); | |
315 | ||
316 | DBG("Sending streams_sent"); | |
317 | /* Get consumer output pointer */ | |
318 | consumer = session->consumer; | |
319 | ||
320 | /* Prep stream consumer message */ | |
321 | consumer_init_streams_sent_comm_msg(&lkm, | |
322 | LTTNG_CONSUMER_STREAMS_SENT, | |
323 | channel_key, consumer->net_seq_index); | |
324 | ||
325 | health_code_update(); | |
326 | ||
327 | /* Send stream and file descriptor */ | |
328 | ret = consumer_send_msg(sock, &lkm); | |
329 | if (ret < 0) { | |
330 | goto error; | |
331 | } | |
332 | ||
333 | error: | |
334 | return ret; | |
335 | } | |
336 | ||
f1e16794 DG |
337 | /* |
338 | * Send all stream fds of kernel channel to the consumer. | |
339 | */ | |
f50f23d9 | 340 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
2bba9e53 DG |
341 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
342 | unsigned int monitor) | |
f1e16794 | 343 | { |
e99f9447 | 344 | int ret = LTTNG_OK; |
f1e16794 | 345 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
346 | |
347 | /* Safety net */ | |
348 | assert(channel); | |
349 | assert(session); | |
350 | assert(session->consumer); | |
f50f23d9 | 351 | assert(sock); |
00e2e675 DG |
352 | |
353 | /* Bail out if consumer is disabled */ | |
354 | if (!session->consumer->enabled) { | |
f73fabfd | 355 | ret = LTTNG_OK; |
00e2e675 DG |
356 | goto error; |
357 | } | |
f1e16794 DG |
358 | |
359 | DBG("Sending streams of channel %s to kernel consumer", | |
360 | channel->channel->name); | |
361 | ||
e99f9447 MD |
362 | if (!channel->sent_to_consumer) { |
363 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); | |
364 | if (ret < 0) { | |
365 | goto error; | |
366 | } | |
367 | channel->sent_to_consumer = true; | |
f1e16794 DG |
368 | } |
369 | ||
370 | /* Send streams */ | |
371 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
6986ab9b | 372 | if (!stream->fd || stream->sent_to_consumer) { |
f1e16794 DG |
373 | continue; |
374 | } | |
00e2e675 DG |
375 | |
376 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
377 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
378 | monitor); | |
f1e16794 | 379 | if (ret < 0) { |
f1e16794 DG |
380 | goto error; |
381 | } | |
6986ab9b | 382 | stream->sent_to_consumer = true; |
f1e16794 DG |
383 | } |
384 | ||
f1e16794 DG |
385 | error: |
386 | return ret; | |
387 | } | |
388 | ||
389 | /* | |
390 | * Send all stream fds of the kernel session to the consumer. | |
391 | */ | |
f50f23d9 DG |
392 | int kernel_consumer_send_session(struct consumer_socket *sock, |
393 | struct ltt_kernel_session *session) | |
f1e16794 | 394 | { |
2bba9e53 | 395 | int ret, monitor = 0; |
f1e16794 | 396 | struct ltt_kernel_channel *chan; |
f1e16794 | 397 | |
00e2e675 DG |
398 | /* Safety net */ |
399 | assert(session); | |
400 | assert(session->consumer); | |
f50f23d9 | 401 | assert(sock); |
f1e16794 | 402 | |
00e2e675 DG |
403 | /* Bail out if consumer is disabled */ |
404 | if (!session->consumer->enabled) { | |
f73fabfd | 405 | ret = LTTNG_OK; |
00e2e675 | 406 | goto error; |
f1e16794 DG |
407 | } |
408 | ||
2bba9e53 DG |
409 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
410 | if (session->output_traces) { | |
411 | monitor = 1; | |
412 | } | |
413 | ||
00e2e675 DG |
414 | DBG("Sending session stream to kernel consumer"); |
415 | ||
609af759 | 416 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 417 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 418 | if (ret < 0) { |
f1e16794 DG |
419 | goto error; |
420 | } | |
f1e16794 DG |
421 | } |
422 | ||
00e2e675 | 423 | /* Send channel and streams of it */ |
f1e16794 | 424 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bba9e53 DG |
425 | ret = kernel_consumer_send_channel_stream(sock, chan, session, |
426 | monitor); | |
f1e16794 DG |
427 | if (ret < 0) { |
428 | goto error; | |
429 | } | |
601262d6 JD |
430 | if (monitor) { |
431 | /* | |
432 | * Inform the relay that all the streams for the | |
433 | * channel were sent. | |
434 | */ | |
435 | ret = kernel_consumer_streams_sent(sock, session, chan->fd); | |
436 | if (ret < 0) { | |
437 | goto error; | |
438 | } | |
439 | } | |
f1e16794 DG |
440 | } |
441 | ||
00e2e675 | 442 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 443 | |
4ce9ff51 | 444 | session->consumer_fds_sent = 1; |
f1e16794 DG |
445 | return 0; |
446 | ||
447 | error: | |
448 | return ret; | |
449 | } | |
07b86b52 JD |
450 | |
451 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
452 | struct ltt_kernel_channel *channel) | |
453 | { | |
454 | int ret; | |
455 | struct lttcomm_consumer_msg msg; | |
456 | ||
457 | assert(channel); | |
458 | assert(socket); | |
07b86b52 JD |
459 | |
460 | DBG("Sending kernel consumer destroy channel key %d", channel->fd); | |
461 | ||
53efb85a | 462 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
463 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
464 | msg.u.destroy_channel.key = channel->fd; | |
465 | ||
466 | pthread_mutex_lock(socket->lock); | |
467 | health_code_update(); | |
468 | ||
469 | ret = consumer_send_msg(socket, &msg); | |
470 | if (ret < 0) { | |
471 | goto error; | |
472 | } | |
473 | ||
474 | error: | |
475 | health_code_update(); | |
476 | pthread_mutex_unlock(socket->lock); | |
477 | return ret; | |
478 | } | |
479 | ||
480 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
481 | struct ltt_kernel_metadata *metadata) | |
482 | { | |
483 | int ret; | |
484 | struct lttcomm_consumer_msg msg; | |
485 | ||
486 | assert(metadata); | |
487 | assert(socket); | |
07b86b52 JD |
488 | |
489 | DBG("Sending kernel consumer destroy channel key %d", metadata->fd); | |
490 | ||
53efb85a | 491 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
492 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
493 | msg.u.destroy_channel.key = metadata->fd; | |
494 | ||
495 | pthread_mutex_lock(socket->lock); | |
496 | health_code_update(); | |
497 | ||
498 | ret = consumer_send_msg(socket, &msg); | |
499 | if (ret < 0) { | |
500 | goto error; | |
501 | } | |
502 | ||
503 | error: | |
504 | health_code_update(); | |
505 | pthread_mutex_unlock(socket->lock); | |
506 | return ret; | |
507 | } |