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