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> | |
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 DG |
30 | #include "kernel-consumer.h" |
31 | ||
2bba9e53 DG |
32 | static char *create_channel_path(struct consumer_output *consumer, |
33 | uid_t uid, gid_t gid) | |
00e2e675 DG |
34 | { |
35 | int ret; | |
ffe60014 | 36 | char tmp_path[PATH_MAX]; |
2bba9e53 | 37 | char *pathname = NULL; |
00e2e675 | 38 | |
2bba9e53 | 39 | assert(consumer); |
00e2e675 | 40 | |
ffe60014 DG |
41 | /* Get the right path name destination */ |
42 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
43 | /* Set application path to the destination path */ | |
dec56f6c | 44 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s", |
ffe60014 DG |
45 | consumer->dst.trace_path, consumer->subdir); |
46 | if (ret < 0) { | |
2bba9e53 | 47 | PERROR("snprintf kernel channel path"); |
ffe60014 DG |
48 | goto error; |
49 | } | |
f5436bfc | 50 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 51 | if (!pathname) { |
f5436bfc | 52 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
53 | goto error; |
54 | } | |
ffe60014 DG |
55 | |
56 | /* Create directory */ | |
2bba9e53 | 57 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid); |
ffe60014 | 58 | if (ret < 0) { |
df5b86c8 | 59 | if (errno != EEXIST) { |
ffe60014 DG |
60 | ERR("Trace directory creation error"); |
61 | goto error; | |
62 | } | |
63 | } | |
64 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
65 | } else { | |
66 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); | |
67 | if (ret < 0) { | |
2bba9e53 | 68 | PERROR("snprintf kernel metadata path"); |
ffe60014 DG |
69 | goto error; |
70 | } | |
f5436bfc | 71 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 72 | if (!pathname) { |
f5436bfc | 73 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
74 | goto error; |
75 | } | |
ffe60014 DG |
76 | DBG3("Kernel network consumer subdir path: %s", pathname); |
77 | } | |
78 | ||
2bba9e53 DG |
79 | return pathname; |
80 | ||
81 | error: | |
82 | free(pathname); | |
83 | return NULL; | |
84 | } | |
85 | ||
86 | /* | |
87 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
88 | */ | |
89 | int kernel_consumer_add_channel(struct consumer_socket *sock, | |
90 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, | |
91 | unsigned int monitor) | |
92 | { | |
93 | int ret; | |
94 | char *pathname; | |
95 | struct lttcomm_consumer_msg lkm; | |
96 | struct consumer_output *consumer; | |
97 | ||
98 | /* Safety net */ | |
99 | assert(channel); | |
100 | assert(session); | |
101 | assert(session->consumer); | |
102 | ||
103 | consumer = session->consumer; | |
104 | ||
105 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
106 | channel->channel->name); | |
107 | ||
108 | if (monitor) { | |
109 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
2bba9e53 DG |
110 | } else { |
111 | /* Empty path. */ | |
53efb85a | 112 | pathname = strdup(""); |
2bba9e53 | 113 | } |
bb3c4e70 MD |
114 | if (!pathname) { |
115 | ret = -1; | |
116 | goto error; | |
117 | } | |
2bba9e53 | 118 | |
00e2e675 DG |
119 | /* Prep channel message structure */ |
120 | consumer_init_channel_comm_msg(&lkm, | |
121 | LTTNG_CONSUMER_ADD_CHANNEL, | |
122 | channel->fd, | |
ffe60014 DG |
123 | session->id, |
124 | pathname, | |
125 | session->uid, | |
126 | session->gid, | |
127 | consumer->net_seq_index, | |
c30aaa51 | 128 | channel->channel->name, |
ffe60014 DG |
129 | channel->stream_count, |
130 | channel->channel->attr.output, | |
1624d5b7 JD |
131 | CONSUMER_CHANNEL_TYPE_DATA, |
132 | channel->channel->attr.tracefile_size, | |
2bba9e53 | 133 | channel->channel->attr.tracefile_count, |
ecc48a90 | 134 | monitor, |
11785f65 JG |
135 | channel->channel->attr.live_timer_interval, |
136 | session->is_live_session); | |
00e2e675 | 137 | |
840cb59c | 138 | health_code_update(); |
ca03de58 | 139 | |
00e2e675 DG |
140 | ret = consumer_send_channel(sock, &lkm); |
141 | if (ret < 0) { | |
142 | goto error; | |
143 | } | |
144 | ||
840cb59c | 145 | health_code_update(); |
ca03de58 | 146 | |
00e2e675 | 147 | error: |
53efb85a | 148 | free(pathname); |
00e2e675 DG |
149 | return ret; |
150 | } | |
151 | ||
152 | /* | |
153 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
ba0fd12e JG |
154 | * |
155 | * The consumer socket lock must be held by the caller. | |
00e2e675 | 156 | */ |
f50f23d9 | 157 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 158 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
159 | { |
160 | int ret; | |
2bba9e53 | 161 | char *pathname; |
00e2e675 | 162 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 163 | struct consumer_output *consumer; |
00e2e675 DG |
164 | |
165 | /* Safety net */ | |
166 | assert(session); | |
167 | assert(session->consumer); | |
f50f23d9 | 168 | assert(sock); |
00e2e675 DG |
169 | |
170 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
171 | ||
172 | /* Get consumer output pointer */ | |
a7d9a3e7 | 173 | consumer = session->consumer; |
00e2e675 | 174 | |
2bba9e53 DG |
175 | if (monitor) { |
176 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
00e2e675 | 177 | } else { |
2bba9e53 | 178 | /* Empty path. */ |
53efb85a | 179 | pathname = strdup(""); |
00e2e675 | 180 | } |
bb3c4e70 MD |
181 | if (!pathname) { |
182 | ret = -1; | |
183 | goto error; | |
184 | } | |
00e2e675 DG |
185 | |
186 | /* Prep channel message structure */ | |
187 | consumer_init_channel_comm_msg(&lkm, | |
188 | LTTNG_CONSUMER_ADD_CHANNEL, | |
189 | session->metadata->fd, | |
ffe60014 DG |
190 | session->id, |
191 | pathname, | |
192 | session->uid, | |
193 | session->gid, | |
194 | consumer->net_seq_index, | |
038abe40 | 195 | session->metadata->conf->name, |
ffe60014 | 196 | 1, |
038abe40 | 197 | session->metadata->conf->attr.output, |
1624d5b7 | 198 | CONSUMER_CHANNEL_TYPE_METADATA, |
038abe40 JG |
199 | session->metadata->conf->attr.tracefile_size, |
200 | session->metadata->conf->attr.tracefile_count, | |
201 | monitor, | |
202 | session->metadata->conf->attr.live_timer_interval, | |
203 | session->is_live_session); | |
00e2e675 | 204 | |
840cb59c | 205 | health_code_update(); |
ca03de58 | 206 | |
00e2e675 DG |
207 | ret = consumer_send_channel(sock, &lkm); |
208 | if (ret < 0) { | |
209 | goto error; | |
210 | } | |
211 | ||
840cb59c | 212 | health_code_update(); |
ca03de58 | 213 | |
00e2e675 DG |
214 | /* Prep stream message structure */ |
215 | consumer_init_stream_comm_msg(&lkm, | |
216 | LTTNG_CONSUMER_ADD_STREAM, | |
217 | session->metadata->fd, | |
218 | session->metadata_stream_fd, | |
1624d5b7 | 219 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 220 | |
840cb59c | 221 | health_code_update(); |
ca03de58 | 222 | |
00e2e675 | 223 | /* Send stream and file descriptor */ |
a7d9a3e7 | 224 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
225 | &session->metadata_stream_fd, 1); |
226 | if (ret < 0) { | |
227 | goto error; | |
228 | } | |
229 | ||
840cb59c | 230 | health_code_update(); |
ca03de58 | 231 | |
00e2e675 | 232 | error: |
53efb85a | 233 | free(pathname); |
00e2e675 DG |
234 | return ret; |
235 | } | |
236 | ||
237 | /* | |
238 | * Sending a single stream to the consumer with command ADD_STREAM. | |
239 | */ | |
f50f23d9 DG |
240 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
241 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 242 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
243 | { |
244 | int ret; | |
00e2e675 | 245 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 246 | struct consumer_output *consumer; |
00e2e675 DG |
247 | |
248 | assert(channel); | |
249 | assert(stream); | |
250 | assert(session); | |
251 | assert(session->consumer); | |
f50f23d9 | 252 | assert(sock); |
00e2e675 DG |
253 | |
254 | DBG("Sending stream %d of channel %s to kernel consumer", | |
255 | stream->fd, channel->channel->name); | |
256 | ||
257 | /* Get consumer output pointer */ | |
a7d9a3e7 | 258 | consumer = session->consumer; |
00e2e675 | 259 | |
00e2e675 | 260 | /* Prep stream consumer message */ |
ffe60014 DG |
261 | consumer_init_stream_comm_msg(&lkm, |
262 | LTTNG_CONSUMER_ADD_STREAM, | |
00e2e675 DG |
263 | channel->fd, |
264 | stream->fd, | |
ffe60014 | 265 | stream->cpu); |
00e2e675 | 266 | |
840cb59c | 267 | health_code_update(); |
ca03de58 | 268 | |
00e2e675 | 269 | /* Send stream and file descriptor */ |
a7d9a3e7 | 270 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
271 | if (ret < 0) { |
272 | goto error; | |
273 | } | |
274 | ||
840cb59c | 275 | health_code_update(); |
ca03de58 | 276 | |
00e2e675 DG |
277 | error: |
278 | return ret; | |
279 | } | |
280 | ||
a4baae1b JD |
281 | /* |
282 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
283 | */ | |
284 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
285 | struct ltt_kernel_session *session, uint64_t channel_key) | |
286 | { | |
287 | int ret; | |
288 | struct lttcomm_consumer_msg lkm; | |
289 | struct consumer_output *consumer; | |
290 | ||
291 | assert(sock); | |
292 | assert(session); | |
293 | ||
294 | DBG("Sending streams_sent"); | |
295 | /* Get consumer output pointer */ | |
296 | consumer = session->consumer; | |
297 | ||
298 | /* Prep stream consumer message */ | |
299 | consumer_init_streams_sent_comm_msg(&lkm, | |
300 | LTTNG_CONSUMER_STREAMS_SENT, | |
301 | channel_key, consumer->net_seq_index); | |
302 | ||
303 | health_code_update(); | |
304 | ||
305 | /* Send stream and file descriptor */ | |
306 | ret = consumer_send_msg(sock, &lkm); | |
307 | if (ret < 0) { | |
308 | goto error; | |
309 | } | |
310 | ||
311 | error: | |
312 | return ret; | |
313 | } | |
314 | ||
f1e16794 DG |
315 | /* |
316 | * Send all stream fds of kernel channel to the consumer. | |
ba0fd12e JG |
317 | * |
318 | * The consumer socket lock must be held by the caller. | |
f1e16794 | 319 | */ |
f50f23d9 | 320 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
2bba9e53 DG |
321 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
322 | unsigned int monitor) | |
f1e16794 | 323 | { |
6c598487 | 324 | int ret = LTTNG_OK; |
f1e16794 | 325 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
326 | |
327 | /* Safety net */ | |
328 | assert(channel); | |
329 | assert(session); | |
330 | assert(session->consumer); | |
f50f23d9 | 331 | assert(sock); |
00e2e675 DG |
332 | |
333 | /* Bail out if consumer is disabled */ | |
334 | if (!session->consumer->enabled) { | |
f73fabfd | 335 | ret = LTTNG_OK; |
00e2e675 DG |
336 | goto error; |
337 | } | |
f1e16794 DG |
338 | |
339 | DBG("Sending streams of channel %s to kernel consumer", | |
340 | channel->channel->name); | |
341 | ||
6c598487 MD |
342 | if (!channel->sent_to_consumer) { |
343 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); | |
344 | if (ret < 0) { | |
345 | goto error; | |
346 | } | |
347 | channel->sent_to_consumer = true; | |
f1e16794 DG |
348 | } |
349 | ||
350 | /* Send streams */ | |
351 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
b64dd54f | 352 | if (!stream->fd || stream->sent_to_consumer) { |
f1e16794 DG |
353 | continue; |
354 | } | |
00e2e675 DG |
355 | |
356 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
357 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
358 | monitor); | |
f1e16794 | 359 | if (ret < 0) { |
f1e16794 DG |
360 | goto error; |
361 | } | |
b64dd54f | 362 | stream->sent_to_consumer = true; |
f1e16794 DG |
363 | } |
364 | ||
f1e16794 DG |
365 | error: |
366 | return ret; | |
367 | } | |
368 | ||
369 | /* | |
370 | * Send all stream fds of the kernel session to the consumer. | |
ba0fd12e JG |
371 | * |
372 | * The consumer socket lock must be held by the caller. | |
f1e16794 | 373 | */ |
f50f23d9 DG |
374 | int kernel_consumer_send_session(struct consumer_socket *sock, |
375 | struct ltt_kernel_session *session) | |
f1e16794 | 376 | { |
2bba9e53 | 377 | int ret, monitor = 0; |
f1e16794 | 378 | struct ltt_kernel_channel *chan; |
f1e16794 | 379 | |
00e2e675 DG |
380 | /* Safety net */ |
381 | assert(session); | |
382 | assert(session->consumer); | |
f50f23d9 | 383 | assert(sock); |
f1e16794 | 384 | |
00e2e675 DG |
385 | /* Bail out if consumer is disabled */ |
386 | if (!session->consumer->enabled) { | |
f73fabfd | 387 | ret = LTTNG_OK; |
00e2e675 | 388 | goto error; |
f1e16794 DG |
389 | } |
390 | ||
2bba9e53 DG |
391 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
392 | if (session->output_traces) { | |
393 | monitor = 1; | |
394 | } | |
395 | ||
00e2e675 DG |
396 | DBG("Sending session stream to kernel consumer"); |
397 | ||
609af759 | 398 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 399 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 400 | if (ret < 0) { |
f1e16794 DG |
401 | goto error; |
402 | } | |
f1e16794 DG |
403 | } |
404 | ||
00e2e675 | 405 | /* Send channel and streams of it */ |
f1e16794 | 406 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bba9e53 DG |
407 | ret = kernel_consumer_send_channel_stream(sock, chan, session, |
408 | monitor); | |
f1e16794 DG |
409 | if (ret < 0) { |
410 | goto error; | |
411 | } | |
601262d6 JD |
412 | if (monitor) { |
413 | /* | |
414 | * Inform the relay that all the streams for the | |
415 | * channel were sent. | |
416 | */ | |
417 | ret = kernel_consumer_streams_sent(sock, session, chan->fd); | |
418 | if (ret < 0) { | |
419 | goto error; | |
420 | } | |
421 | } | |
f1e16794 DG |
422 | } |
423 | ||
00e2e675 | 424 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 425 | |
4ce9ff51 | 426 | session->consumer_fds_sent = 1; |
f1e16794 DG |
427 | return 0; |
428 | ||
429 | error: | |
430 | return ret; | |
431 | } | |
07b86b52 JD |
432 | |
433 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
434 | struct ltt_kernel_channel *channel) | |
435 | { | |
436 | int ret; | |
437 | struct lttcomm_consumer_msg msg; | |
438 | ||
439 | assert(channel); | |
440 | assert(socket); | |
07b86b52 JD |
441 | |
442 | DBG("Sending kernel consumer destroy channel key %d", channel->fd); | |
443 | ||
53efb85a | 444 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
445 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
446 | msg.u.destroy_channel.key = channel->fd; | |
447 | ||
448 | pthread_mutex_lock(socket->lock); | |
449 | health_code_update(); | |
450 | ||
451 | ret = consumer_send_msg(socket, &msg); | |
452 | if (ret < 0) { | |
453 | goto error; | |
454 | } | |
455 | ||
456 | error: | |
457 | health_code_update(); | |
458 | pthread_mutex_unlock(socket->lock); | |
459 | return ret; | |
460 | } | |
461 | ||
462 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
463 | struct ltt_kernel_metadata *metadata) | |
464 | { | |
465 | int ret; | |
466 | struct lttcomm_consumer_msg msg; | |
467 | ||
468 | assert(metadata); | |
469 | assert(socket); | |
07b86b52 JD |
470 | |
471 | DBG("Sending kernel consumer destroy channel key %d", metadata->fd); | |
472 | ||
53efb85a | 473 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
474 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
475 | msg.u.destroy_channel.key = metadata->fd; | |
476 | ||
477 | pthread_mutex_lock(socket->lock); | |
478 | health_code_update(); | |
479 | ||
480 | ret = consumer_send_msg(socket, &msg); | |
481 | if (ret < 0) { | |
482 | goto error; | |
483 | } | |
484 | ||
485 | error: | |
486 | health_code_update(); | |
487 | pthread_mutex_unlock(socket->lock); | |
488 | return ret; | |
489 | } |