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 | } | |
00e2e675 | 171 | error: |
53efb85a | 172 | free(pathname); |
00e2e675 DG |
173 | return ret; |
174 | } | |
175 | ||
176 | /* | |
177 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
178 | */ | |
f50f23d9 | 179 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 180 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
181 | { |
182 | int ret; | |
2bba9e53 | 183 | char *pathname; |
00e2e675 | 184 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 185 | struct consumer_output *consumer; |
00e2e675 DG |
186 | |
187 | /* Safety net */ | |
188 | assert(session); | |
189 | assert(session->consumer); | |
f50f23d9 | 190 | assert(sock); |
00e2e675 DG |
191 | |
192 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
193 | ||
194 | /* Get consumer output pointer */ | |
a7d9a3e7 | 195 | consumer = session->consumer; |
00e2e675 | 196 | |
2bba9e53 DG |
197 | if (monitor) { |
198 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
00e2e675 | 199 | } else { |
2bba9e53 | 200 | /* Empty path. */ |
53efb85a | 201 | pathname = strdup(""); |
00e2e675 | 202 | } |
bb3c4e70 MD |
203 | if (!pathname) { |
204 | ret = -1; | |
205 | goto error; | |
206 | } | |
00e2e675 DG |
207 | |
208 | /* Prep channel message structure */ | |
209 | consumer_init_channel_comm_msg(&lkm, | |
210 | LTTNG_CONSUMER_ADD_CHANNEL, | |
211 | session->metadata->fd, | |
ffe60014 DG |
212 | session->id, |
213 | pathname, | |
214 | session->uid, | |
215 | session->gid, | |
216 | consumer->net_seq_index, | |
30079b6b | 217 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
218 | 1, |
219 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 220 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 221 | 0, 0, |
e9404c27 | 222 | monitor, 0, 0); |
00e2e675 | 223 | |
840cb59c | 224 | health_code_update(); |
ca03de58 | 225 | |
00e2e675 DG |
226 | ret = consumer_send_channel(sock, &lkm); |
227 | if (ret < 0) { | |
228 | goto error; | |
229 | } | |
230 | ||
840cb59c | 231 | health_code_update(); |
ca03de58 | 232 | |
00e2e675 DG |
233 | /* Prep stream message structure */ |
234 | consumer_init_stream_comm_msg(&lkm, | |
235 | LTTNG_CONSUMER_ADD_STREAM, | |
236 | session->metadata->fd, | |
237 | session->metadata_stream_fd, | |
1624d5b7 | 238 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 239 | |
840cb59c | 240 | health_code_update(); |
ca03de58 | 241 | |
00e2e675 | 242 | /* Send stream and file descriptor */ |
a7d9a3e7 | 243 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
244 | &session->metadata_stream_fd, 1); |
245 | if (ret < 0) { | |
246 | goto error; | |
247 | } | |
248 | ||
840cb59c | 249 | health_code_update(); |
ca03de58 | 250 | |
00e2e675 | 251 | error: |
53efb85a | 252 | free(pathname); |
00e2e675 DG |
253 | return ret; |
254 | } | |
255 | ||
256 | /* | |
257 | * Sending a single stream to the consumer with command ADD_STREAM. | |
258 | */ | |
f50f23d9 DG |
259 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
260 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 261 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
262 | { |
263 | int ret; | |
00e2e675 | 264 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 265 | struct consumer_output *consumer; |
00e2e675 DG |
266 | |
267 | assert(channel); | |
268 | assert(stream); | |
269 | assert(session); | |
270 | assert(session->consumer); | |
f50f23d9 | 271 | assert(sock); |
00e2e675 DG |
272 | |
273 | DBG("Sending stream %d of channel %s to kernel consumer", | |
274 | stream->fd, channel->channel->name); | |
275 | ||
276 | /* Get consumer output pointer */ | |
a7d9a3e7 | 277 | consumer = session->consumer; |
00e2e675 | 278 | |
00e2e675 | 279 | /* Prep stream consumer message */ |
ffe60014 DG |
280 | consumer_init_stream_comm_msg(&lkm, |
281 | LTTNG_CONSUMER_ADD_STREAM, | |
00e2e675 DG |
282 | channel->fd, |
283 | stream->fd, | |
ffe60014 | 284 | stream->cpu); |
00e2e675 | 285 | |
840cb59c | 286 | health_code_update(); |
ca03de58 | 287 | |
00e2e675 | 288 | /* Send stream and file descriptor */ |
a7d9a3e7 | 289 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
290 | if (ret < 0) { |
291 | goto error; | |
292 | } | |
293 | ||
840cb59c | 294 | health_code_update(); |
ca03de58 | 295 | |
00e2e675 DG |
296 | error: |
297 | return ret; | |
298 | } | |
299 | ||
a4baae1b JD |
300 | /* |
301 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
302 | */ | |
303 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
304 | struct ltt_kernel_session *session, uint64_t channel_key) | |
305 | { | |
306 | int ret; | |
307 | struct lttcomm_consumer_msg lkm; | |
308 | struct consumer_output *consumer; | |
309 | ||
310 | assert(sock); | |
311 | assert(session); | |
312 | ||
313 | DBG("Sending streams_sent"); | |
314 | /* Get consumer output pointer */ | |
315 | consumer = session->consumer; | |
316 | ||
317 | /* Prep stream consumer message */ | |
318 | consumer_init_streams_sent_comm_msg(&lkm, | |
319 | LTTNG_CONSUMER_STREAMS_SENT, | |
320 | channel_key, consumer->net_seq_index); | |
321 | ||
322 | health_code_update(); | |
323 | ||
324 | /* Send stream and file descriptor */ | |
325 | ret = consumer_send_msg(sock, &lkm); | |
326 | if (ret < 0) { | |
327 | goto error; | |
328 | } | |
329 | ||
330 | error: | |
331 | return ret; | |
332 | } | |
333 | ||
f1e16794 DG |
334 | /* |
335 | * Send all stream fds of kernel channel to the consumer. | |
336 | */ | |
f50f23d9 | 337 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
2bba9e53 DG |
338 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
339 | unsigned int monitor) | |
f1e16794 | 340 | { |
e99f9447 | 341 | int ret = LTTNG_OK; |
f1e16794 | 342 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
343 | |
344 | /* Safety net */ | |
345 | assert(channel); | |
346 | assert(session); | |
347 | assert(session->consumer); | |
f50f23d9 | 348 | assert(sock); |
00e2e675 DG |
349 | |
350 | /* Bail out if consumer is disabled */ | |
351 | if (!session->consumer->enabled) { | |
f73fabfd | 352 | ret = LTTNG_OK; |
00e2e675 DG |
353 | goto error; |
354 | } | |
f1e16794 DG |
355 | |
356 | DBG("Sending streams of channel %s to kernel consumer", | |
357 | channel->channel->name); | |
358 | ||
e99f9447 MD |
359 | if (!channel->sent_to_consumer) { |
360 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); | |
361 | if (ret < 0) { | |
362 | goto error; | |
363 | } | |
364 | channel->sent_to_consumer = true; | |
f1e16794 DG |
365 | } |
366 | ||
367 | /* Send streams */ | |
368 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
6986ab9b | 369 | if (!stream->fd || stream->sent_to_consumer) { |
f1e16794 DG |
370 | continue; |
371 | } | |
00e2e675 DG |
372 | |
373 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
374 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
375 | monitor); | |
f1e16794 | 376 | if (ret < 0) { |
f1e16794 DG |
377 | goto error; |
378 | } | |
6986ab9b | 379 | stream->sent_to_consumer = true; |
f1e16794 DG |
380 | } |
381 | ||
f1e16794 DG |
382 | error: |
383 | return ret; | |
384 | } | |
385 | ||
386 | /* | |
387 | * Send all stream fds of the kernel session to the consumer. | |
388 | */ | |
f50f23d9 DG |
389 | int kernel_consumer_send_session(struct consumer_socket *sock, |
390 | struct ltt_kernel_session *session) | |
f1e16794 | 391 | { |
2bba9e53 | 392 | int ret, monitor = 0; |
f1e16794 | 393 | struct ltt_kernel_channel *chan; |
f1e16794 | 394 | |
00e2e675 DG |
395 | /* Safety net */ |
396 | assert(session); | |
397 | assert(session->consumer); | |
f50f23d9 | 398 | assert(sock); |
f1e16794 | 399 | |
00e2e675 DG |
400 | /* Bail out if consumer is disabled */ |
401 | if (!session->consumer->enabled) { | |
f73fabfd | 402 | ret = LTTNG_OK; |
00e2e675 | 403 | goto error; |
f1e16794 DG |
404 | } |
405 | ||
2bba9e53 DG |
406 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
407 | if (session->output_traces) { | |
408 | monitor = 1; | |
409 | } | |
410 | ||
00e2e675 DG |
411 | DBG("Sending session stream to kernel consumer"); |
412 | ||
609af759 | 413 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 414 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 415 | if (ret < 0) { |
f1e16794 DG |
416 | goto error; |
417 | } | |
f1e16794 DG |
418 | } |
419 | ||
00e2e675 | 420 | /* Send channel and streams of it */ |
f1e16794 | 421 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bba9e53 DG |
422 | ret = kernel_consumer_send_channel_stream(sock, chan, session, |
423 | monitor); | |
f1e16794 DG |
424 | if (ret < 0) { |
425 | goto error; | |
426 | } | |
601262d6 JD |
427 | if (monitor) { |
428 | /* | |
429 | * Inform the relay that all the streams for the | |
430 | * channel were sent. | |
431 | */ | |
432 | ret = kernel_consumer_streams_sent(sock, session, chan->fd); | |
433 | if (ret < 0) { | |
434 | goto error; | |
435 | } | |
436 | } | |
f1e16794 DG |
437 | } |
438 | ||
00e2e675 | 439 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 440 | |
4ce9ff51 | 441 | session->consumer_fds_sent = 1; |
f1e16794 DG |
442 | return 0; |
443 | ||
444 | error: | |
445 | return ret; | |
446 | } | |
07b86b52 JD |
447 | |
448 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
449 | struct ltt_kernel_channel *channel) | |
450 | { | |
451 | int ret; | |
452 | struct lttcomm_consumer_msg msg; | |
453 | ||
454 | assert(channel); | |
455 | assert(socket); | |
07b86b52 JD |
456 | |
457 | DBG("Sending kernel consumer destroy channel key %d", channel->fd); | |
458 | ||
53efb85a | 459 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
460 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
461 | msg.u.destroy_channel.key = channel->fd; | |
462 | ||
463 | pthread_mutex_lock(socket->lock); | |
464 | health_code_update(); | |
465 | ||
466 | ret = consumer_send_msg(socket, &msg); | |
467 | if (ret < 0) { | |
468 | goto error; | |
469 | } | |
470 | ||
471 | error: | |
472 | health_code_update(); | |
473 | pthread_mutex_unlock(socket->lock); | |
474 | return ret; | |
475 | } | |
476 | ||
477 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
478 | struct ltt_kernel_metadata *metadata) | |
479 | { | |
480 | int ret; | |
481 | struct lttcomm_consumer_msg msg; | |
482 | ||
483 | assert(metadata); | |
484 | assert(socket); | |
07b86b52 JD |
485 | |
486 | DBG("Sending kernel consumer destroy channel key %d", metadata->fd); | |
487 | ||
53efb85a | 488 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
489 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
490 | msg.u.destroy_channel.key = metadata->fd; | |
491 | ||
492 | pthread_mutex_lock(socket->lock); | |
493 | health_code_update(); | |
494 | ||
495 | ret = consumer_send_msg(socket, &msg); | |
496 | if (ret < 0) { | |
497 | goto error; | |
498 | } | |
499 | ||
500 | error: | |
501 | health_code_update(); | |
502 | pthread_mutex_unlock(socket->lock); | |
503 | return ret; | |
504 | } |