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 | ||
18 | #define _GNU_SOURCE | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
f1e16794 DG |
20 | #include <stdio.h> |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <unistd.h> | |
25 | ||
26 | #include <common/common.h> | |
27 | #include <common/defaults.h> | |
f1e16794 | 28 | |
00e2e675 | 29 | #include "consumer.h" |
8782cc74 | 30 | #include "health-sessiond.h" |
f1e16794 DG |
31 | #include "kernel-consumer.h" |
32 | ||
2bba9e53 DG |
33 | static char *create_channel_path(struct consumer_output *consumer, |
34 | uid_t uid, gid_t gid) | |
00e2e675 DG |
35 | { |
36 | int ret; | |
ffe60014 | 37 | char tmp_path[PATH_MAX]; |
2bba9e53 | 38 | char *pathname = NULL; |
00e2e675 | 39 | |
2bba9e53 | 40 | assert(consumer); |
00e2e675 | 41 | |
ffe60014 DG |
42 | /* Get the right path name destination */ |
43 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
44 | /* Set application path to the destination path */ | |
dec56f6c | 45 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s", |
ffe60014 DG |
46 | consumer->dst.trace_path, consumer->subdir); |
47 | if (ret < 0) { | |
2bba9e53 | 48 | PERROR("snprintf kernel channel path"); |
ffe60014 DG |
49 | goto error; |
50 | } | |
2bba9e53 | 51 | pathname = strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 MD |
52 | if (!pathname) { |
53 | PERROR("strndup"); | |
54 | goto error; | |
55 | } | |
ffe60014 DG |
56 | |
57 | /* Create directory */ | |
2bba9e53 | 58 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid); |
ffe60014 DG |
59 | if (ret < 0) { |
60 | if (ret != -EEXIST) { | |
61 | ERR("Trace directory creation error"); | |
62 | goto error; | |
63 | } | |
64 | } | |
65 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
66 | } else { | |
67 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); | |
68 | if (ret < 0) { | |
2bba9e53 | 69 | PERROR("snprintf kernel metadata path"); |
ffe60014 DG |
70 | goto error; |
71 | } | |
2bba9e53 | 72 | pathname = strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 MD |
73 | if (!pathname) { |
74 | PERROR("strndup"); | |
75 | goto error; | |
76 | } | |
ffe60014 DG |
77 | DBG3("Kernel network consumer subdir path: %s", pathname); |
78 | } | |
79 | ||
2bba9e53 DG |
80 | return pathname; |
81 | ||
82 | error: | |
83 | free(pathname); | |
84 | return NULL; | |
85 | } | |
86 | ||
87 | /* | |
88 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
89 | */ | |
90 | int kernel_consumer_add_channel(struct consumer_socket *sock, | |
91 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, | |
92 | unsigned int monitor) | |
93 | { | |
94 | int ret; | |
95 | char *pathname; | |
96 | struct lttcomm_consumer_msg lkm; | |
97 | struct consumer_output *consumer; | |
98 | ||
99 | /* Safety net */ | |
100 | assert(channel); | |
101 | assert(session); | |
102 | assert(session->consumer); | |
103 | ||
104 | consumer = session->consumer; | |
105 | ||
106 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
107 | channel->channel->name); | |
108 | ||
109 | if (monitor) { | |
110 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
2bba9e53 DG |
111 | } else { |
112 | /* Empty path. */ | |
53efb85a | 113 | pathname = strdup(""); |
2bba9e53 | 114 | } |
bb3c4e70 MD |
115 | if (!pathname) { |
116 | ret = -1; | |
117 | goto error; | |
118 | } | |
2bba9e53 | 119 | |
00e2e675 DG |
120 | /* Prep channel message structure */ |
121 | consumer_init_channel_comm_msg(&lkm, | |
122 | LTTNG_CONSUMER_ADD_CHANNEL, | |
123 | channel->fd, | |
ffe60014 DG |
124 | session->id, |
125 | pathname, | |
126 | session->uid, | |
127 | session->gid, | |
128 | consumer->net_seq_index, | |
c30aaa51 | 129 | channel->channel->name, |
ffe60014 DG |
130 | channel->stream_count, |
131 | channel->channel->attr.output, | |
1624d5b7 JD |
132 | CONSUMER_CHANNEL_TYPE_DATA, |
133 | channel->channel->attr.tracefile_size, | |
2bba9e53 | 134 | channel->channel->attr.tracefile_count, |
ecc48a90 JD |
135 | monitor, |
136 | channel->channel->attr.live_timer_interval); | |
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. | |
154 | */ | |
f50f23d9 | 155 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 156 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
157 | { |
158 | int ret; | |
2bba9e53 | 159 | char *pathname; |
00e2e675 | 160 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 161 | struct consumer_output *consumer; |
00e2e675 DG |
162 | |
163 | /* Safety net */ | |
164 | assert(session); | |
165 | assert(session->consumer); | |
f50f23d9 | 166 | assert(sock); |
00e2e675 DG |
167 | |
168 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
169 | ||
170 | /* Get consumer output pointer */ | |
a7d9a3e7 | 171 | consumer = session->consumer; |
00e2e675 | 172 | |
2bba9e53 DG |
173 | if (monitor) { |
174 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
00e2e675 | 175 | } else { |
2bba9e53 | 176 | /* Empty path. */ |
53efb85a | 177 | pathname = strdup(""); |
00e2e675 | 178 | } |
bb3c4e70 MD |
179 | if (!pathname) { |
180 | ret = -1; | |
181 | goto error; | |
182 | } | |
00e2e675 DG |
183 | |
184 | /* Prep channel message structure */ | |
185 | consumer_init_channel_comm_msg(&lkm, | |
186 | LTTNG_CONSUMER_ADD_CHANNEL, | |
187 | session->metadata->fd, | |
ffe60014 DG |
188 | session->id, |
189 | pathname, | |
190 | session->uid, | |
191 | session->gid, | |
192 | consumer->net_seq_index, | |
30079b6b | 193 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
194 | 1, |
195 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 196 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 197 | 0, 0, |
ecc48a90 | 198 | monitor, 0); |
00e2e675 | 199 | |
840cb59c | 200 | health_code_update(); |
ca03de58 | 201 | |
00e2e675 DG |
202 | ret = consumer_send_channel(sock, &lkm); |
203 | if (ret < 0) { | |
204 | goto error; | |
205 | } | |
206 | ||
840cb59c | 207 | health_code_update(); |
ca03de58 | 208 | |
00e2e675 DG |
209 | /* Prep stream message structure */ |
210 | consumer_init_stream_comm_msg(&lkm, | |
211 | LTTNG_CONSUMER_ADD_STREAM, | |
212 | session->metadata->fd, | |
213 | session->metadata_stream_fd, | |
1624d5b7 | 214 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 215 | |
840cb59c | 216 | health_code_update(); |
ca03de58 | 217 | |
00e2e675 | 218 | /* Send stream and file descriptor */ |
a7d9a3e7 | 219 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
220 | &session->metadata_stream_fd, 1); |
221 | if (ret < 0) { | |
222 | goto error; | |
223 | } | |
224 | ||
840cb59c | 225 | health_code_update(); |
ca03de58 | 226 | |
00e2e675 | 227 | error: |
53efb85a | 228 | free(pathname); |
00e2e675 DG |
229 | return ret; |
230 | } | |
231 | ||
232 | /* | |
233 | * Sending a single stream to the consumer with command ADD_STREAM. | |
234 | */ | |
f50f23d9 DG |
235 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
236 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 237 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
238 | { |
239 | int ret; | |
00e2e675 | 240 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 241 | struct consumer_output *consumer; |
00e2e675 DG |
242 | |
243 | assert(channel); | |
244 | assert(stream); | |
245 | assert(session); | |
246 | assert(session->consumer); | |
f50f23d9 | 247 | assert(sock); |
00e2e675 DG |
248 | |
249 | DBG("Sending stream %d of channel %s to kernel consumer", | |
250 | stream->fd, channel->channel->name); | |
251 | ||
252 | /* Get consumer output pointer */ | |
a7d9a3e7 | 253 | consumer = session->consumer; |
00e2e675 | 254 | |
00e2e675 | 255 | /* Prep stream consumer message */ |
ffe60014 DG |
256 | consumer_init_stream_comm_msg(&lkm, |
257 | LTTNG_CONSUMER_ADD_STREAM, | |
00e2e675 DG |
258 | channel->fd, |
259 | stream->fd, | |
ffe60014 | 260 | stream->cpu); |
00e2e675 | 261 | |
840cb59c | 262 | health_code_update(); |
ca03de58 | 263 | |
00e2e675 | 264 | /* Send stream and file descriptor */ |
a7d9a3e7 | 265 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
266 | if (ret < 0) { |
267 | goto error; | |
268 | } | |
269 | ||
840cb59c | 270 | health_code_update(); |
ca03de58 | 271 | |
00e2e675 DG |
272 | error: |
273 | return ret; | |
274 | } | |
275 | ||
a4baae1b JD |
276 | /* |
277 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
278 | */ | |
279 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
280 | struct ltt_kernel_session *session, uint64_t channel_key) | |
281 | { | |
282 | int ret; | |
283 | struct lttcomm_consumer_msg lkm; | |
284 | struct consumer_output *consumer; | |
285 | ||
286 | assert(sock); | |
287 | assert(session); | |
288 | ||
289 | DBG("Sending streams_sent"); | |
290 | /* Get consumer output pointer */ | |
291 | consumer = session->consumer; | |
292 | ||
293 | /* Prep stream consumer message */ | |
294 | consumer_init_streams_sent_comm_msg(&lkm, | |
295 | LTTNG_CONSUMER_STREAMS_SENT, | |
296 | channel_key, consumer->net_seq_index); | |
297 | ||
298 | health_code_update(); | |
299 | ||
300 | /* Send stream and file descriptor */ | |
301 | ret = consumer_send_msg(sock, &lkm); | |
302 | if (ret < 0) { | |
303 | goto error; | |
304 | } | |
305 | ||
306 | error: | |
307 | return ret; | |
308 | } | |
309 | ||
f1e16794 DG |
310 | /* |
311 | * Send all stream fds of kernel channel to the consumer. | |
312 | */ | |
f50f23d9 | 313 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
2bba9e53 DG |
314 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
315 | unsigned int monitor) | |
f1e16794 | 316 | { |
00e2e675 | 317 | int ret; |
f1e16794 | 318 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
319 | |
320 | /* Safety net */ | |
321 | assert(channel); | |
322 | assert(session); | |
323 | assert(session->consumer); | |
f50f23d9 | 324 | assert(sock); |
00e2e675 DG |
325 | |
326 | /* Bail out if consumer is disabled */ | |
327 | if (!session->consumer->enabled) { | |
f73fabfd | 328 | ret = LTTNG_OK; |
00e2e675 DG |
329 | goto error; |
330 | } | |
f1e16794 DG |
331 | |
332 | DBG("Sending streams of channel %s to kernel consumer", | |
333 | channel->channel->name); | |
334 | ||
2bba9e53 | 335 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); |
f1e16794 | 336 | if (ret < 0) { |
f1e16794 DG |
337 | goto error; |
338 | } | |
339 | ||
340 | /* Send streams */ | |
341 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
342 | if (!stream->fd) { | |
343 | continue; | |
344 | } | |
00e2e675 DG |
345 | |
346 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
347 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
348 | monitor); | |
f1e16794 | 349 | if (ret < 0) { |
f1e16794 DG |
350 | goto error; |
351 | } | |
352 | } | |
353 | ||
f1e16794 DG |
354 | error: |
355 | return ret; | |
356 | } | |
357 | ||
358 | /* | |
359 | * Send all stream fds of the kernel session to the consumer. | |
360 | */ | |
f50f23d9 DG |
361 | int kernel_consumer_send_session(struct consumer_socket *sock, |
362 | struct ltt_kernel_session *session) | |
f1e16794 | 363 | { |
2bba9e53 | 364 | int ret, monitor = 0; |
f1e16794 | 365 | struct ltt_kernel_channel *chan; |
f1e16794 | 366 | |
00e2e675 DG |
367 | /* Safety net */ |
368 | assert(session); | |
369 | assert(session->consumer); | |
f50f23d9 | 370 | assert(sock); |
f1e16794 | 371 | |
00e2e675 DG |
372 | /* Bail out if consumer is disabled */ |
373 | if (!session->consumer->enabled) { | |
f73fabfd | 374 | ret = LTTNG_OK; |
00e2e675 | 375 | goto error; |
f1e16794 DG |
376 | } |
377 | ||
2bba9e53 DG |
378 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
379 | if (session->output_traces) { | |
380 | monitor = 1; | |
381 | } | |
382 | ||
00e2e675 DG |
383 | DBG("Sending session stream to kernel consumer"); |
384 | ||
609af759 | 385 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 386 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 387 | if (ret < 0) { |
f1e16794 DG |
388 | goto error; |
389 | } | |
f1e16794 DG |
390 | } |
391 | ||
00e2e675 | 392 | /* Send channel and streams of it */ |
f1e16794 | 393 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bba9e53 DG |
394 | ret = kernel_consumer_send_channel_stream(sock, chan, session, |
395 | monitor); | |
f1e16794 DG |
396 | if (ret < 0) { |
397 | goto error; | |
398 | } | |
601262d6 JD |
399 | if (monitor) { |
400 | /* | |
401 | * Inform the relay that all the streams for the | |
402 | * channel were sent. | |
403 | */ | |
404 | ret = kernel_consumer_streams_sent(sock, session, chan->fd); | |
405 | if (ret < 0) { | |
406 | goto error; | |
407 | } | |
408 | } | |
f1e16794 DG |
409 | } |
410 | ||
00e2e675 | 411 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 412 | |
4ce9ff51 | 413 | session->consumer_fds_sent = 1; |
f1e16794 DG |
414 | return 0; |
415 | ||
416 | error: | |
417 | return ret; | |
418 | } | |
07b86b52 JD |
419 | |
420 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
421 | struct ltt_kernel_channel *channel) | |
422 | { | |
423 | int ret; | |
424 | struct lttcomm_consumer_msg msg; | |
425 | ||
426 | assert(channel); | |
427 | assert(socket); | |
07b86b52 JD |
428 | |
429 | DBG("Sending kernel consumer destroy channel key %d", channel->fd); | |
430 | ||
53efb85a | 431 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
432 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
433 | msg.u.destroy_channel.key = channel->fd; | |
434 | ||
435 | pthread_mutex_lock(socket->lock); | |
436 | health_code_update(); | |
437 | ||
438 | ret = consumer_send_msg(socket, &msg); | |
439 | if (ret < 0) { | |
440 | goto error; | |
441 | } | |
442 | ||
443 | error: | |
444 | health_code_update(); | |
445 | pthread_mutex_unlock(socket->lock); | |
446 | return ret; | |
447 | } | |
448 | ||
449 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
450 | struct ltt_kernel_metadata *metadata) | |
451 | { | |
452 | int ret; | |
453 | struct lttcomm_consumer_msg msg; | |
454 | ||
455 | assert(metadata); | |
456 | assert(socket); | |
07b86b52 JD |
457 | |
458 | DBG("Sending kernel consumer destroy channel key %d", metadata->fd); | |
459 | ||
53efb85a | 460 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
461 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
462 | msg.u.destroy_channel.key = metadata->fd; | |
463 | ||
464 | pthread_mutex_lock(socket->lock); | |
465 | health_code_update(); | |
466 | ||
467 | ret = consumer_send_msg(socket, &msg); | |
468 | if (ret < 0) { | |
469 | goto error; | |
470 | } | |
471 | ||
472 | error: | |
473 | health_code_update(); | |
474 | pthread_mutex_unlock(socket->lock); | |
475 | return ret; | |
476 | } |