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 | 54 | goto error; |
dba13f1d JG |
55 | } else if (ret >= sizeof(tmp_path)) { |
56 | ERR("Kernel channel path exceeds the maximal allowed length of of %zu bytes (%i bytes required) with path \"%s%s%s\"", | |
57 | sizeof(tmp_path), ret, | |
58 | consumer->dst.session_root_path, | |
59 | consumer->chunk_path, | |
60 | consumer->subdir); | |
61 | goto error; | |
ffe60014 | 62 | } |
f5436bfc | 63 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 64 | if (!pathname) { |
f5436bfc | 65 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
66 | goto error; |
67 | } | |
ffe60014 DG |
68 | |
69 | /* Create directory */ | |
2bba9e53 | 70 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid); |
ffe60014 | 71 | if (ret < 0) { |
df5b86c8 | 72 | if (errno != EEXIST) { |
ffe60014 DG |
73 | ERR("Trace directory creation error"); |
74 | goto error; | |
75 | } | |
76 | } | |
77 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
78 | } else { | |
2b29c638 JD |
79 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s", |
80 | consumer->dst.net.base_dir, | |
81 | consumer->subdir); | |
ffe60014 | 82 | if (ret < 0) { |
2bba9e53 | 83 | PERROR("snprintf kernel metadata path"); |
ffe60014 | 84 | goto error; |
dba13f1d JG |
85 | } else if (ret >= sizeof(tmp_path)) { |
86 | ERR("Kernel channel path exceeds the maximal allowed length of of %zu bytes (%i bytes required) with path \"%s%s\"", | |
87 | sizeof(tmp_path), ret, | |
88 | consumer->dst.net.base_dir, | |
89 | consumer->subdir); | |
90 | goto error; | |
ffe60014 | 91 | } |
f5436bfc | 92 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 93 | if (!pathname) { |
f5436bfc | 94 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
95 | goto error; |
96 | } | |
ffe60014 DG |
97 | DBG3("Kernel network consumer subdir path: %s", pathname); |
98 | } | |
99 | ||
2bba9e53 DG |
100 | return pathname; |
101 | ||
102 | error: | |
103 | free(pathname); | |
104 | return NULL; | |
105 | } | |
106 | ||
107 | /* | |
108 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
109 | */ | |
110 | int kernel_consumer_add_channel(struct consumer_socket *sock, | |
e9404c27 JG |
111 | struct ltt_kernel_channel *channel, |
112 | struct ltt_kernel_session *ksession, | |
2bba9e53 DG |
113 | unsigned int monitor) |
114 | { | |
115 | int ret; | |
116 | char *pathname; | |
117 | struct lttcomm_consumer_msg lkm; | |
118 | struct consumer_output *consumer; | |
e9404c27 JG |
119 | enum lttng_error_code status; |
120 | struct ltt_session *session; | |
121 | struct lttng_channel_extended *channel_attr_extended; | |
2bba9e53 DG |
122 | |
123 | /* Safety net */ | |
124 | assert(channel); | |
e9404c27 JG |
125 | assert(ksession); |
126 | assert(ksession->consumer); | |
2bba9e53 | 127 | |
e9404c27 JG |
128 | consumer = ksession->consumer; |
129 | channel_attr_extended = (struct lttng_channel_extended *) | |
130 | channel->channel->attr.extended.ptr; | |
2bba9e53 DG |
131 | |
132 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
133 | channel->channel->name); | |
134 | ||
135 | if (monitor) { | |
e9404c27 JG |
136 | pathname = create_channel_path(consumer, ksession->uid, |
137 | ksession->gid); | |
2bba9e53 DG |
138 | } else { |
139 | /* Empty path. */ | |
53efb85a | 140 | pathname = strdup(""); |
2bba9e53 | 141 | } |
bb3c4e70 MD |
142 | if (!pathname) { |
143 | ret = -1; | |
144 | goto error; | |
145 | } | |
2bba9e53 | 146 | |
00e2e675 | 147 | /* Prep channel message structure */ |
638e7b4e | 148 | consumer_init_add_channel_comm_msg(&lkm, |
e1f3997a | 149 | channel->key, |
e9404c27 | 150 | ksession->id, |
ffe60014 | 151 | pathname, |
e9404c27 JG |
152 | ksession->uid, |
153 | ksession->gid, | |
ffe60014 | 154 | consumer->net_seq_index, |
c30aaa51 | 155 | channel->channel->name, |
ffe60014 DG |
156 | channel->stream_count, |
157 | channel->channel->attr.output, | |
1624d5b7 JD |
158 | CONSUMER_CHANNEL_TYPE_DATA, |
159 | channel->channel->attr.tracefile_size, | |
2bba9e53 | 160 | channel->channel->attr.tracefile_count, |
ecc48a90 | 161 | monitor, |
e9404c27 JG |
162 | channel->channel->attr.live_timer_interval, |
163 | channel_attr_extended->monitor_timer_interval); | |
00e2e675 | 164 | |
840cb59c | 165 | health_code_update(); |
ca03de58 | 166 | |
00e2e675 DG |
167 | ret = consumer_send_channel(sock, &lkm); |
168 | if (ret < 0) { | |
169 | goto error; | |
170 | } | |
171 | ||
840cb59c | 172 | health_code_update(); |
e9404c27 JG |
173 | rcu_read_lock(); |
174 | session = session_find_by_id(ksession->id); | |
175 | assert(session); | |
ca03de58 | 176 | |
e9404c27 JG |
177 | status = notification_thread_command_add_channel( |
178 | notification_thread_handle, session->name, | |
179 | ksession->uid, ksession->gid, | |
e1f3997a | 180 | channel->channel->name, channel->key, |
e9404c27 JG |
181 | LTTNG_DOMAIN_KERNEL, |
182 | channel->channel->attr.subbuf_size * channel->channel->attr.num_subbuf); | |
183 | rcu_read_unlock(); | |
184 | if (status != LTTNG_OK) { | |
185 | ret = -1; | |
186 | goto error; | |
187 | } | |
753873bf JR |
188 | |
189 | channel->published_to_notification_thread = true; | |
190 | ||
00e2e675 | 191 | error: |
53efb85a | 192 | free(pathname); |
00e2e675 DG |
193 | return ret; |
194 | } | |
195 | ||
196 | /* | |
197 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
9a318688 JG |
198 | * |
199 | * The consumer socket lock must be held by the caller. | |
00e2e675 | 200 | */ |
f50f23d9 | 201 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 202 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
203 | { |
204 | int ret; | |
2bba9e53 | 205 | char *pathname; |
00e2e675 | 206 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 207 | struct consumer_output *consumer; |
00e2e675 DG |
208 | |
209 | /* Safety net */ | |
210 | assert(session); | |
211 | assert(session->consumer); | |
f50f23d9 | 212 | assert(sock); |
00e2e675 DG |
213 | |
214 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
215 | ||
216 | /* Get consumer output pointer */ | |
a7d9a3e7 | 217 | consumer = session->consumer; |
00e2e675 | 218 | |
2bba9e53 DG |
219 | if (monitor) { |
220 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
00e2e675 | 221 | } else { |
2bba9e53 | 222 | /* Empty path. */ |
53efb85a | 223 | pathname = strdup(""); |
00e2e675 | 224 | } |
bb3c4e70 MD |
225 | if (!pathname) { |
226 | ret = -1; | |
227 | goto error; | |
228 | } | |
00e2e675 DG |
229 | |
230 | /* Prep channel message structure */ | |
638e7b4e | 231 | consumer_init_add_channel_comm_msg(&lkm, |
d40f0359 | 232 | session->metadata->key, |
ffe60014 DG |
233 | session->id, |
234 | pathname, | |
235 | session->uid, | |
236 | session->gid, | |
237 | consumer->net_seq_index, | |
30079b6b | 238 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
239 | 1, |
240 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 241 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 242 | 0, 0, |
e9404c27 | 243 | monitor, 0, 0); |
00e2e675 | 244 | |
840cb59c | 245 | health_code_update(); |
ca03de58 | 246 | |
00e2e675 DG |
247 | ret = consumer_send_channel(sock, &lkm); |
248 | if (ret < 0) { | |
249 | goto error; | |
250 | } | |
251 | ||
840cb59c | 252 | health_code_update(); |
ca03de58 | 253 | |
00e2e675 DG |
254 | /* Prep stream message structure */ |
255 | consumer_init_stream_comm_msg(&lkm, | |
256 | LTTNG_CONSUMER_ADD_STREAM, | |
d40f0359 | 257 | session->metadata->key, |
00e2e675 | 258 | session->metadata_stream_fd, |
1624d5b7 | 259 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 260 | |
840cb59c | 261 | health_code_update(); |
ca03de58 | 262 | |
00e2e675 | 263 | /* Send stream and file descriptor */ |
a7d9a3e7 | 264 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
265 | &session->metadata_stream_fd, 1); |
266 | if (ret < 0) { | |
267 | goto error; | |
268 | } | |
269 | ||
840cb59c | 270 | health_code_update(); |
ca03de58 | 271 | |
00e2e675 | 272 | error: |
53efb85a | 273 | free(pathname); |
00e2e675 DG |
274 | return ret; |
275 | } | |
276 | ||
277 | /* | |
278 | * Sending a single stream to the consumer with command ADD_STREAM. | |
279 | */ | |
5b0e3ccb | 280 | static |
f50f23d9 DG |
281 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
282 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 283 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
284 | { |
285 | int ret; | |
00e2e675 | 286 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 287 | struct consumer_output *consumer; |
00e2e675 DG |
288 | |
289 | assert(channel); | |
290 | assert(stream); | |
291 | assert(session); | |
292 | assert(session->consumer); | |
f50f23d9 | 293 | assert(sock); |
00e2e675 DG |
294 | |
295 | DBG("Sending stream %d of channel %s to kernel consumer", | |
296 | stream->fd, channel->channel->name); | |
297 | ||
298 | /* Get consumer output pointer */ | |
a7d9a3e7 | 299 | consumer = session->consumer; |
00e2e675 | 300 | |
00e2e675 | 301 | /* Prep stream consumer message */ |
ffe60014 DG |
302 | consumer_init_stream_comm_msg(&lkm, |
303 | LTTNG_CONSUMER_ADD_STREAM, | |
e1f3997a | 304 | channel->key, |
00e2e675 | 305 | stream->fd, |
ffe60014 | 306 | stream->cpu); |
00e2e675 | 307 | |
840cb59c | 308 | health_code_update(); |
ca03de58 | 309 | |
00e2e675 | 310 | /* Send stream and file descriptor */ |
a7d9a3e7 | 311 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
312 | if (ret < 0) { |
313 | goto error; | |
314 | } | |
315 | ||
840cb59c | 316 | health_code_update(); |
ca03de58 | 317 | |
00e2e675 DG |
318 | error: |
319 | return ret; | |
320 | } | |
321 | ||
a4baae1b JD |
322 | /* |
323 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
324 | */ | |
325 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
326 | struct ltt_kernel_session *session, uint64_t channel_key) | |
327 | { | |
328 | int ret; | |
329 | struct lttcomm_consumer_msg lkm; | |
330 | struct consumer_output *consumer; | |
331 | ||
332 | assert(sock); | |
333 | assert(session); | |
334 | ||
335 | DBG("Sending streams_sent"); | |
336 | /* Get consumer output pointer */ | |
337 | consumer = session->consumer; | |
338 | ||
339 | /* Prep stream consumer message */ | |
340 | consumer_init_streams_sent_comm_msg(&lkm, | |
341 | LTTNG_CONSUMER_STREAMS_SENT, | |
342 | channel_key, consumer->net_seq_index); | |
343 | ||
344 | health_code_update(); | |
345 | ||
346 | /* Send stream and file descriptor */ | |
347 | ret = consumer_send_msg(sock, &lkm); | |
348 | if (ret < 0) { | |
349 | goto error; | |
350 | } | |
351 | ||
352 | error: | |
353 | return ret; | |
354 | } | |
355 | ||
f1e16794 DG |
356 | /* |
357 | * Send all stream fds of kernel channel to the consumer. | |
9a318688 JG |
358 | * |
359 | * The consumer socket lock must be held by the caller. | |
f1e16794 | 360 | */ |
1fc1b7c8 | 361 | int kernel_consumer_send_channel_streams(struct consumer_socket *sock, |
2bba9e53 DG |
362 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
363 | unsigned int monitor) | |
f1e16794 | 364 | { |
e99f9447 | 365 | int ret = LTTNG_OK; |
f1e16794 | 366 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
367 | |
368 | /* Safety net */ | |
369 | assert(channel); | |
370 | assert(session); | |
371 | assert(session->consumer); | |
f50f23d9 | 372 | assert(sock); |
00e2e675 DG |
373 | |
374 | /* Bail out if consumer is disabled */ | |
375 | if (!session->consumer->enabled) { | |
f73fabfd | 376 | ret = LTTNG_OK; |
00e2e675 DG |
377 | goto error; |
378 | } | |
f1e16794 DG |
379 | |
380 | DBG("Sending streams of channel %s to kernel consumer", | |
381 | channel->channel->name); | |
382 | ||
e99f9447 MD |
383 | if (!channel->sent_to_consumer) { |
384 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); | |
385 | if (ret < 0) { | |
386 | goto error; | |
387 | } | |
388 | channel->sent_to_consumer = true; | |
f1e16794 DG |
389 | } |
390 | ||
391 | /* Send streams */ | |
392 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
6986ab9b | 393 | if (!stream->fd || stream->sent_to_consumer) { |
f1e16794 DG |
394 | continue; |
395 | } | |
00e2e675 DG |
396 | |
397 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
398 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
399 | monitor); | |
f1e16794 | 400 | if (ret < 0) { |
f1e16794 DG |
401 | goto error; |
402 | } | |
6986ab9b | 403 | stream->sent_to_consumer = true; |
f1e16794 DG |
404 | } |
405 | ||
f1e16794 DG |
406 | error: |
407 | return ret; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Send all stream fds of the kernel session to the consumer. | |
9a318688 JG |
412 | * |
413 | * The consumer socket lock must be held by the caller. | |
f1e16794 | 414 | */ |
f50f23d9 DG |
415 | int kernel_consumer_send_session(struct consumer_socket *sock, |
416 | struct ltt_kernel_session *session) | |
f1e16794 | 417 | { |
2bba9e53 | 418 | int ret, monitor = 0; |
f1e16794 | 419 | struct ltt_kernel_channel *chan; |
f1e16794 | 420 | |
00e2e675 DG |
421 | /* Safety net */ |
422 | assert(session); | |
423 | assert(session->consumer); | |
f50f23d9 | 424 | assert(sock); |
f1e16794 | 425 | |
00e2e675 DG |
426 | /* Bail out if consumer is disabled */ |
427 | if (!session->consumer->enabled) { | |
f73fabfd | 428 | ret = LTTNG_OK; |
00e2e675 | 429 | goto error; |
f1e16794 DG |
430 | } |
431 | ||
2bba9e53 DG |
432 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
433 | if (session->output_traces) { | |
434 | monitor = 1; | |
435 | } | |
436 | ||
00e2e675 DG |
437 | DBG("Sending session stream to kernel consumer"); |
438 | ||
609af759 | 439 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 440 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 441 | if (ret < 0) { |
f1e16794 DG |
442 | goto error; |
443 | } | |
f1e16794 DG |
444 | } |
445 | ||
00e2e675 | 446 | /* Send channel and streams of it */ |
f1e16794 | 447 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
1fc1b7c8 | 448 | ret = kernel_consumer_send_channel_streams(sock, chan, session, |
2bba9e53 | 449 | monitor); |
f1e16794 DG |
450 | if (ret < 0) { |
451 | goto error; | |
452 | } | |
601262d6 JD |
453 | if (monitor) { |
454 | /* | |
455 | * Inform the relay that all the streams for the | |
456 | * channel were sent. | |
457 | */ | |
e1f3997a | 458 | ret = kernel_consumer_streams_sent(sock, session, chan->key); |
601262d6 JD |
459 | if (ret < 0) { |
460 | goto error; | |
461 | } | |
462 | } | |
f1e16794 DG |
463 | } |
464 | ||
00e2e675 | 465 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 466 | |
4ce9ff51 | 467 | session->consumer_fds_sent = 1; |
f1e16794 DG |
468 | return 0; |
469 | ||
470 | error: | |
471 | return ret; | |
472 | } | |
07b86b52 JD |
473 | |
474 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
475 | struct ltt_kernel_channel *channel) | |
476 | { | |
477 | int ret; | |
478 | struct lttcomm_consumer_msg msg; | |
479 | ||
480 | assert(channel); | |
481 | assert(socket); | |
07b86b52 | 482 | |
e1f3997a | 483 | DBG("Sending kernel consumer destroy channel key %" PRIu64, channel->key); |
07b86b52 | 484 | |
53efb85a | 485 | memset(&msg, 0, sizeof(msg)); |
07b86b52 | 486 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
e1f3997a | 487 | msg.u.destroy_channel.key = channel->key; |
07b86b52 JD |
488 | |
489 | pthread_mutex_lock(socket->lock); | |
490 | health_code_update(); | |
491 | ||
492 | ret = consumer_send_msg(socket, &msg); | |
493 | if (ret < 0) { | |
494 | goto error; | |
495 | } | |
496 | ||
497 | error: | |
498 | health_code_update(); | |
499 | pthread_mutex_unlock(socket->lock); | |
500 | return ret; | |
501 | } | |
502 | ||
503 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
504 | struct ltt_kernel_metadata *metadata) | |
505 | { | |
506 | int ret; | |
507 | struct lttcomm_consumer_msg msg; | |
508 | ||
509 | assert(metadata); | |
510 | assert(socket); | |
07b86b52 | 511 | |
d40f0359 | 512 | DBG("Sending kernel consumer destroy channel key %" PRIu64, metadata->key); |
07b86b52 | 513 | |
53efb85a | 514 | memset(&msg, 0, sizeof(msg)); |
07b86b52 | 515 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
d40f0359 | 516 | msg.u.destroy_channel.key = metadata->key; |
07b86b52 JD |
517 | |
518 | pthread_mutex_lock(socket->lock); | |
519 | health_code_update(); | |
520 | ||
521 | ret = consumer_send_msg(socket, &msg); | |
522 | if (ret < 0) { | |
523 | goto error; | |
524 | } | |
525 | ||
526 | error: | |
527 | health_code_update(); | |
528 | pthread_mutex_unlock(socket->lock); | |
529 | return ret; | |
530 | } |