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 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 JD |
134 | monitor, |
135 | channel->channel->attr.live_timer_interval); | |
00e2e675 | 136 | |
840cb59c | 137 | health_code_update(); |
ca03de58 | 138 | |
00e2e675 DG |
139 | ret = consumer_send_channel(sock, &lkm); |
140 | if (ret < 0) { | |
141 | goto error; | |
142 | } | |
143 | ||
840cb59c | 144 | health_code_update(); |
ca03de58 | 145 | |
00e2e675 | 146 | error: |
53efb85a | 147 | free(pathname); |
00e2e675 DG |
148 | return ret; |
149 | } | |
150 | ||
151 | /* | |
152 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
153 | */ | |
f50f23d9 | 154 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 155 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
156 | { |
157 | int ret; | |
2bba9e53 | 158 | char *pathname; |
00e2e675 | 159 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 160 | struct consumer_output *consumer; |
00e2e675 DG |
161 | |
162 | /* Safety net */ | |
163 | assert(session); | |
164 | assert(session->consumer); | |
f50f23d9 | 165 | assert(sock); |
00e2e675 DG |
166 | |
167 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
168 | ||
169 | /* Get consumer output pointer */ | |
a7d9a3e7 | 170 | consumer = session->consumer; |
00e2e675 | 171 | |
2bba9e53 DG |
172 | if (monitor) { |
173 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
00e2e675 | 174 | } else { |
2bba9e53 | 175 | /* Empty path. */ |
53efb85a | 176 | pathname = strdup(""); |
00e2e675 | 177 | } |
bb3c4e70 MD |
178 | if (!pathname) { |
179 | ret = -1; | |
180 | goto error; | |
181 | } | |
00e2e675 DG |
182 | |
183 | /* Prep channel message structure */ | |
184 | consumer_init_channel_comm_msg(&lkm, | |
185 | LTTNG_CONSUMER_ADD_CHANNEL, | |
186 | session->metadata->fd, | |
ffe60014 DG |
187 | session->id, |
188 | pathname, | |
189 | session->uid, | |
190 | session->gid, | |
191 | consumer->net_seq_index, | |
30079b6b | 192 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
193 | 1, |
194 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 195 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 196 | 0, 0, |
ecc48a90 | 197 | monitor, 0); |
00e2e675 | 198 | |
840cb59c | 199 | health_code_update(); |
ca03de58 | 200 | |
00e2e675 DG |
201 | ret = consumer_send_channel(sock, &lkm); |
202 | if (ret < 0) { | |
203 | goto error; | |
204 | } | |
205 | ||
840cb59c | 206 | health_code_update(); |
ca03de58 | 207 | |
00e2e675 DG |
208 | /* Prep stream message structure */ |
209 | consumer_init_stream_comm_msg(&lkm, | |
210 | LTTNG_CONSUMER_ADD_STREAM, | |
211 | session->metadata->fd, | |
212 | session->metadata_stream_fd, | |
1624d5b7 | 213 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 214 | |
840cb59c | 215 | health_code_update(); |
ca03de58 | 216 | |
00e2e675 | 217 | /* Send stream and file descriptor */ |
a7d9a3e7 | 218 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
219 | &session->metadata_stream_fd, 1); |
220 | if (ret < 0) { | |
221 | goto error; | |
222 | } | |
223 | ||
840cb59c | 224 | health_code_update(); |
ca03de58 | 225 | |
00e2e675 | 226 | error: |
53efb85a | 227 | free(pathname); |
00e2e675 DG |
228 | return ret; |
229 | } | |
230 | ||
231 | /* | |
232 | * Sending a single stream to the consumer with command ADD_STREAM. | |
233 | */ | |
f50f23d9 DG |
234 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
235 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 236 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
237 | { |
238 | int ret; | |
00e2e675 | 239 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 240 | struct consumer_output *consumer; |
00e2e675 DG |
241 | |
242 | assert(channel); | |
243 | assert(stream); | |
244 | assert(session); | |
245 | assert(session->consumer); | |
f50f23d9 | 246 | assert(sock); |
00e2e675 DG |
247 | |
248 | DBG("Sending stream %d of channel %s to kernel consumer", | |
249 | stream->fd, channel->channel->name); | |
250 | ||
251 | /* Get consumer output pointer */ | |
a7d9a3e7 | 252 | consumer = session->consumer; |
00e2e675 | 253 | |
00e2e675 | 254 | /* Prep stream consumer message */ |
ffe60014 DG |
255 | consumer_init_stream_comm_msg(&lkm, |
256 | LTTNG_CONSUMER_ADD_STREAM, | |
00e2e675 DG |
257 | channel->fd, |
258 | stream->fd, | |
ffe60014 | 259 | stream->cpu); |
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, &stream->fd, 1); |
00e2e675 DG |
265 | if (ret < 0) { |
266 | goto error; | |
267 | } | |
268 | ||
840cb59c | 269 | health_code_update(); |
ca03de58 | 270 | |
00e2e675 DG |
271 | error: |
272 | return ret; | |
273 | } | |
274 | ||
a4baae1b JD |
275 | /* |
276 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
277 | */ | |
278 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
279 | struct ltt_kernel_session *session, uint64_t channel_key) | |
280 | { | |
281 | int ret; | |
282 | struct lttcomm_consumer_msg lkm; | |
283 | struct consumer_output *consumer; | |
284 | ||
285 | assert(sock); | |
286 | assert(session); | |
287 | ||
288 | DBG("Sending streams_sent"); | |
289 | /* Get consumer output pointer */ | |
290 | consumer = session->consumer; | |
291 | ||
292 | /* Prep stream consumer message */ | |
293 | consumer_init_streams_sent_comm_msg(&lkm, | |
294 | LTTNG_CONSUMER_STREAMS_SENT, | |
295 | channel_key, consumer->net_seq_index); | |
296 | ||
297 | health_code_update(); | |
298 | ||
299 | /* Send stream and file descriptor */ | |
300 | ret = consumer_send_msg(sock, &lkm); | |
301 | if (ret < 0) { | |
302 | goto error; | |
303 | } | |
304 | ||
305 | error: | |
306 | return ret; | |
307 | } | |
308 | ||
f1e16794 DG |
309 | /* |
310 | * Send all stream fds of kernel channel to the consumer. | |
311 | */ | |
f50f23d9 | 312 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
2bba9e53 DG |
313 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
314 | unsigned int monitor) | |
f1e16794 | 315 | { |
00e2e675 | 316 | int ret; |
f1e16794 | 317 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
318 | |
319 | /* Safety net */ | |
320 | assert(channel); | |
321 | assert(session); | |
322 | assert(session->consumer); | |
f50f23d9 | 323 | assert(sock); |
00e2e675 DG |
324 | |
325 | /* Bail out if consumer is disabled */ | |
326 | if (!session->consumer->enabled) { | |
f73fabfd | 327 | ret = LTTNG_OK; |
00e2e675 DG |
328 | goto error; |
329 | } | |
f1e16794 DG |
330 | |
331 | DBG("Sending streams of channel %s to kernel consumer", | |
332 | channel->channel->name); | |
333 | ||
2bba9e53 | 334 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); |
f1e16794 | 335 | if (ret < 0) { |
f1e16794 DG |
336 | goto error; |
337 | } | |
338 | ||
339 | /* Send streams */ | |
340 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
341 | if (!stream->fd) { | |
342 | continue; | |
343 | } | |
00e2e675 DG |
344 | |
345 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
346 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
347 | monitor); | |
f1e16794 | 348 | if (ret < 0) { |
f1e16794 DG |
349 | goto error; |
350 | } | |
351 | } | |
352 | ||
f1e16794 DG |
353 | error: |
354 | return ret; | |
355 | } | |
356 | ||
357 | /* | |
358 | * Send all stream fds of the kernel session to the consumer. | |
359 | */ | |
f50f23d9 DG |
360 | int kernel_consumer_send_session(struct consumer_socket *sock, |
361 | struct ltt_kernel_session *session) | |
f1e16794 | 362 | { |
2bba9e53 | 363 | int ret, monitor = 0; |
f1e16794 | 364 | struct ltt_kernel_channel *chan; |
f1e16794 | 365 | |
00e2e675 DG |
366 | /* Safety net */ |
367 | assert(session); | |
368 | assert(session->consumer); | |
f50f23d9 | 369 | assert(sock); |
f1e16794 | 370 | |
00e2e675 DG |
371 | /* Bail out if consumer is disabled */ |
372 | if (!session->consumer->enabled) { | |
f73fabfd | 373 | ret = LTTNG_OK; |
00e2e675 | 374 | goto error; |
f1e16794 DG |
375 | } |
376 | ||
2bba9e53 DG |
377 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
378 | if (session->output_traces) { | |
379 | monitor = 1; | |
380 | } | |
381 | ||
00e2e675 DG |
382 | DBG("Sending session stream to kernel consumer"); |
383 | ||
609af759 | 384 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 385 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 386 | if (ret < 0) { |
f1e16794 DG |
387 | goto error; |
388 | } | |
f1e16794 DG |
389 | } |
390 | ||
00e2e675 | 391 | /* Send channel and streams of it */ |
f1e16794 | 392 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bba9e53 DG |
393 | ret = kernel_consumer_send_channel_stream(sock, chan, session, |
394 | monitor); | |
f1e16794 DG |
395 | if (ret < 0) { |
396 | goto error; | |
397 | } | |
601262d6 JD |
398 | if (monitor) { |
399 | /* | |
400 | * Inform the relay that all the streams for the | |
401 | * channel were sent. | |
402 | */ | |
403 | ret = kernel_consumer_streams_sent(sock, session, chan->fd); | |
404 | if (ret < 0) { | |
405 | goto error; | |
406 | } | |
407 | } | |
f1e16794 DG |
408 | } |
409 | ||
00e2e675 | 410 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 411 | |
4ce9ff51 | 412 | session->consumer_fds_sent = 1; |
f1e16794 DG |
413 | return 0; |
414 | ||
415 | error: | |
416 | return ret; | |
417 | } | |
07b86b52 JD |
418 | |
419 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
420 | struct ltt_kernel_channel *channel) | |
421 | { | |
422 | int ret; | |
423 | struct lttcomm_consumer_msg msg; | |
424 | ||
425 | assert(channel); | |
426 | assert(socket); | |
07b86b52 JD |
427 | |
428 | DBG("Sending kernel consumer destroy channel key %d", channel->fd); | |
429 | ||
53efb85a | 430 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
431 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
432 | msg.u.destroy_channel.key = channel->fd; | |
433 | ||
434 | pthread_mutex_lock(socket->lock); | |
435 | health_code_update(); | |
436 | ||
437 | ret = consumer_send_msg(socket, &msg); | |
438 | if (ret < 0) { | |
439 | goto error; | |
440 | } | |
441 | ||
442 | error: | |
443 | health_code_update(); | |
444 | pthread_mutex_unlock(socket->lock); | |
445 | return ret; | |
446 | } | |
447 | ||
448 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
449 | struct ltt_kernel_metadata *metadata) | |
450 | { | |
451 | int ret; | |
452 | struct lttcomm_consumer_msg msg; | |
453 | ||
454 | assert(metadata); | |
455 | assert(socket); | |
07b86b52 JD |
456 | |
457 | DBG("Sending kernel consumer destroy channel key %d", metadata->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 = metadata->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 | } |