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)); |
ffe60014 DG |
52 | |
53 | /* Create directory */ | |
2bba9e53 | 54 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid); |
ffe60014 DG |
55 | if (ret < 0) { |
56 | if (ret != -EEXIST) { | |
57 | ERR("Trace directory creation error"); | |
58 | goto error; | |
59 | } | |
60 | } | |
61 | DBG3("Kernel local consumer tracefile path: %s", pathname); | |
62 | } else { | |
63 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir); | |
64 | if (ret < 0) { | |
2bba9e53 | 65 | PERROR("snprintf kernel metadata path"); |
ffe60014 DG |
66 | goto error; |
67 | } | |
2bba9e53 | 68 | pathname = strndup(tmp_path, sizeof(tmp_path)); |
ffe60014 DG |
69 | DBG3("Kernel network consumer subdir path: %s", pathname); |
70 | } | |
71 | ||
2bba9e53 DG |
72 | return pathname; |
73 | ||
74 | error: | |
75 | free(pathname); | |
76 | return NULL; | |
77 | } | |
78 | ||
79 | /* | |
80 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
81 | */ | |
82 | int kernel_consumer_add_channel(struct consumer_socket *sock, | |
83 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, | |
84 | unsigned int monitor) | |
85 | { | |
86 | int ret; | |
87 | char *pathname; | |
88 | struct lttcomm_consumer_msg lkm; | |
89 | struct consumer_output *consumer; | |
90 | ||
91 | /* Safety net */ | |
92 | assert(channel); | |
93 | assert(session); | |
94 | assert(session->consumer); | |
95 | ||
96 | consumer = session->consumer; | |
97 | ||
98 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
99 | channel->channel->name); | |
100 | ||
101 | if (monitor) { | |
102 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
103 | if (!pathname) { | |
104 | ret = -1; | |
105 | goto error; | |
106 | } | |
107 | } else { | |
108 | /* Empty path. */ | |
53efb85a | 109 | pathname = strdup(""); |
2bba9e53 DG |
110 | } |
111 | ||
00e2e675 DG |
112 | /* Prep channel message structure */ |
113 | consumer_init_channel_comm_msg(&lkm, | |
114 | LTTNG_CONSUMER_ADD_CHANNEL, | |
115 | channel->fd, | |
ffe60014 DG |
116 | session->id, |
117 | pathname, | |
118 | session->uid, | |
119 | session->gid, | |
120 | consumer->net_seq_index, | |
c30aaa51 | 121 | channel->channel->name, |
ffe60014 DG |
122 | channel->stream_count, |
123 | channel->channel->attr.output, | |
1624d5b7 JD |
124 | CONSUMER_CHANNEL_TYPE_DATA, |
125 | channel->channel->attr.tracefile_size, | |
2bba9e53 | 126 | channel->channel->attr.tracefile_count, |
ecc48a90 JD |
127 | monitor, |
128 | channel->channel->attr.live_timer_interval); | |
00e2e675 | 129 | |
840cb59c | 130 | health_code_update(); |
ca03de58 | 131 | |
00e2e675 DG |
132 | ret = consumer_send_channel(sock, &lkm); |
133 | if (ret < 0) { | |
134 | goto error; | |
135 | } | |
136 | ||
840cb59c | 137 | health_code_update(); |
ca03de58 | 138 | |
00e2e675 | 139 | error: |
53efb85a | 140 | free(pathname); |
00e2e675 DG |
141 | return ret; |
142 | } | |
143 | ||
144 | /* | |
145 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
146 | */ | |
f50f23d9 | 147 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 148 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
149 | { |
150 | int ret; | |
2bba9e53 | 151 | char *pathname; |
00e2e675 | 152 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 153 | struct consumer_output *consumer; |
00e2e675 DG |
154 | |
155 | /* Safety net */ | |
156 | assert(session); | |
157 | assert(session->consumer); | |
f50f23d9 | 158 | assert(sock); |
00e2e675 DG |
159 | |
160 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
161 | ||
162 | /* Get consumer output pointer */ | |
a7d9a3e7 | 163 | consumer = session->consumer; |
00e2e675 | 164 | |
2bba9e53 DG |
165 | if (monitor) { |
166 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
167 | if (!pathname) { | |
168 | ret = -1; | |
a7d9a3e7 DG |
169 | goto error; |
170 | } | |
00e2e675 | 171 | } else { |
2bba9e53 | 172 | /* Empty path. */ |
53efb85a | 173 | pathname = strdup(""); |
00e2e675 DG |
174 | } |
175 | ||
176 | /* Prep channel message structure */ | |
177 | consumer_init_channel_comm_msg(&lkm, | |
178 | LTTNG_CONSUMER_ADD_CHANNEL, | |
179 | session->metadata->fd, | |
ffe60014 DG |
180 | session->id, |
181 | pathname, | |
182 | session->uid, | |
183 | session->gid, | |
184 | consumer->net_seq_index, | |
30079b6b | 185 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
186 | 1, |
187 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 188 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 189 | 0, 0, |
ecc48a90 | 190 | monitor, 0); |
00e2e675 | 191 | |
840cb59c | 192 | health_code_update(); |
ca03de58 | 193 | |
00e2e675 DG |
194 | ret = consumer_send_channel(sock, &lkm); |
195 | if (ret < 0) { | |
196 | goto error; | |
197 | } | |
198 | ||
840cb59c | 199 | health_code_update(); |
ca03de58 | 200 | |
00e2e675 DG |
201 | /* Prep stream message structure */ |
202 | consumer_init_stream_comm_msg(&lkm, | |
203 | LTTNG_CONSUMER_ADD_STREAM, | |
204 | session->metadata->fd, | |
205 | session->metadata_stream_fd, | |
1624d5b7 | 206 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 207 | |
840cb59c | 208 | health_code_update(); |
ca03de58 | 209 | |
00e2e675 | 210 | /* Send stream and file descriptor */ |
a7d9a3e7 | 211 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
212 | &session->metadata_stream_fd, 1); |
213 | if (ret < 0) { | |
214 | goto error; | |
215 | } | |
216 | ||
840cb59c | 217 | health_code_update(); |
ca03de58 | 218 | |
00e2e675 | 219 | error: |
53efb85a | 220 | free(pathname); |
00e2e675 DG |
221 | return ret; |
222 | } | |
223 | ||
224 | /* | |
225 | * Sending a single stream to the consumer with command ADD_STREAM. | |
226 | */ | |
f50f23d9 DG |
227 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
228 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 229 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
230 | { |
231 | int ret; | |
00e2e675 | 232 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 233 | struct consumer_output *consumer; |
00e2e675 DG |
234 | |
235 | assert(channel); | |
236 | assert(stream); | |
237 | assert(session); | |
238 | assert(session->consumer); | |
f50f23d9 | 239 | assert(sock); |
00e2e675 DG |
240 | |
241 | DBG("Sending stream %d of channel %s to kernel consumer", | |
242 | stream->fd, channel->channel->name); | |
243 | ||
244 | /* Get consumer output pointer */ | |
a7d9a3e7 | 245 | consumer = session->consumer; |
00e2e675 | 246 | |
00e2e675 | 247 | /* Prep stream consumer message */ |
ffe60014 DG |
248 | consumer_init_stream_comm_msg(&lkm, |
249 | LTTNG_CONSUMER_ADD_STREAM, | |
00e2e675 DG |
250 | channel->fd, |
251 | stream->fd, | |
ffe60014 | 252 | stream->cpu); |
00e2e675 | 253 | |
840cb59c | 254 | health_code_update(); |
ca03de58 | 255 | |
00e2e675 | 256 | /* Send stream and file descriptor */ |
a7d9a3e7 | 257 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
258 | if (ret < 0) { |
259 | goto error; | |
260 | } | |
261 | ||
840cb59c | 262 | health_code_update(); |
ca03de58 | 263 | |
00e2e675 DG |
264 | error: |
265 | return ret; | |
266 | } | |
267 | ||
a4baae1b JD |
268 | /* |
269 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
270 | */ | |
271 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
272 | struct ltt_kernel_session *session, uint64_t channel_key) | |
273 | { | |
274 | int ret; | |
275 | struct lttcomm_consumer_msg lkm; | |
276 | struct consumer_output *consumer; | |
277 | ||
278 | assert(sock); | |
279 | assert(session); | |
280 | ||
281 | DBG("Sending streams_sent"); | |
282 | /* Get consumer output pointer */ | |
283 | consumer = session->consumer; | |
284 | ||
285 | /* Prep stream consumer message */ | |
286 | consumer_init_streams_sent_comm_msg(&lkm, | |
287 | LTTNG_CONSUMER_STREAMS_SENT, | |
288 | channel_key, consumer->net_seq_index); | |
289 | ||
290 | health_code_update(); | |
291 | ||
292 | /* Send stream and file descriptor */ | |
293 | ret = consumer_send_msg(sock, &lkm); | |
294 | if (ret < 0) { | |
295 | goto error; | |
296 | } | |
297 | ||
298 | error: | |
299 | return ret; | |
300 | } | |
301 | ||
f1e16794 DG |
302 | /* |
303 | * Send all stream fds of kernel channel to the consumer. | |
304 | */ | |
f50f23d9 | 305 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
2bba9e53 DG |
306 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
307 | unsigned int monitor) | |
f1e16794 | 308 | { |
00e2e675 | 309 | int ret; |
f1e16794 | 310 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
311 | |
312 | /* Safety net */ | |
313 | assert(channel); | |
314 | assert(session); | |
315 | assert(session->consumer); | |
f50f23d9 | 316 | assert(sock); |
00e2e675 DG |
317 | |
318 | /* Bail out if consumer is disabled */ | |
319 | if (!session->consumer->enabled) { | |
f73fabfd | 320 | ret = LTTNG_OK; |
00e2e675 DG |
321 | goto error; |
322 | } | |
f1e16794 DG |
323 | |
324 | DBG("Sending streams of channel %s to kernel consumer", | |
325 | channel->channel->name); | |
326 | ||
2bba9e53 | 327 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); |
f1e16794 | 328 | if (ret < 0) { |
f1e16794 DG |
329 | goto error; |
330 | } | |
331 | ||
332 | /* Send streams */ | |
333 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
334 | if (!stream->fd) { | |
335 | continue; | |
336 | } | |
00e2e675 DG |
337 | |
338 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
339 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
340 | monitor); | |
f1e16794 | 341 | if (ret < 0) { |
f1e16794 DG |
342 | goto error; |
343 | } | |
344 | } | |
345 | ||
f1e16794 DG |
346 | error: |
347 | return ret; | |
348 | } | |
349 | ||
350 | /* | |
351 | * Send all stream fds of the kernel session to the consumer. | |
352 | */ | |
f50f23d9 DG |
353 | int kernel_consumer_send_session(struct consumer_socket *sock, |
354 | struct ltt_kernel_session *session) | |
f1e16794 | 355 | { |
2bba9e53 | 356 | int ret, monitor = 0; |
f1e16794 | 357 | struct ltt_kernel_channel *chan; |
f1e16794 | 358 | |
00e2e675 DG |
359 | /* Safety net */ |
360 | assert(session); | |
361 | assert(session->consumer); | |
f50f23d9 | 362 | assert(sock); |
f1e16794 | 363 | |
00e2e675 DG |
364 | /* Bail out if consumer is disabled */ |
365 | if (!session->consumer->enabled) { | |
f73fabfd | 366 | ret = LTTNG_OK; |
00e2e675 | 367 | goto error; |
f1e16794 DG |
368 | } |
369 | ||
2bba9e53 DG |
370 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
371 | if (session->output_traces) { | |
372 | monitor = 1; | |
373 | } | |
374 | ||
00e2e675 DG |
375 | DBG("Sending session stream to kernel consumer"); |
376 | ||
609af759 | 377 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 378 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 379 | if (ret < 0) { |
f1e16794 DG |
380 | goto error; |
381 | } | |
f1e16794 DG |
382 | } |
383 | ||
00e2e675 | 384 | /* Send channel and streams of it */ |
f1e16794 | 385 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bba9e53 DG |
386 | ret = kernel_consumer_send_channel_stream(sock, chan, session, |
387 | monitor); | |
f1e16794 DG |
388 | if (ret < 0) { |
389 | goto error; | |
390 | } | |
601262d6 JD |
391 | if (monitor) { |
392 | /* | |
393 | * Inform the relay that all the streams for the | |
394 | * channel were sent. | |
395 | */ | |
396 | ret = kernel_consumer_streams_sent(sock, session, chan->fd); | |
397 | if (ret < 0) { | |
398 | goto error; | |
399 | } | |
400 | } | |
f1e16794 DG |
401 | } |
402 | ||
00e2e675 | 403 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 404 | |
4ce9ff51 | 405 | session->consumer_fds_sent = 1; |
f1e16794 DG |
406 | return 0; |
407 | ||
408 | error: | |
409 | return ret; | |
410 | } | |
07b86b52 JD |
411 | |
412 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
413 | struct ltt_kernel_channel *channel) | |
414 | { | |
415 | int ret; | |
416 | struct lttcomm_consumer_msg msg; | |
417 | ||
418 | assert(channel); | |
419 | assert(socket); | |
07b86b52 JD |
420 | |
421 | DBG("Sending kernel consumer destroy channel key %d", channel->fd); | |
422 | ||
53efb85a | 423 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
424 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
425 | msg.u.destroy_channel.key = channel->fd; | |
426 | ||
427 | pthread_mutex_lock(socket->lock); | |
428 | health_code_update(); | |
429 | ||
430 | ret = consumer_send_msg(socket, &msg); | |
431 | if (ret < 0) { | |
432 | goto error; | |
433 | } | |
434 | ||
435 | error: | |
436 | health_code_update(); | |
437 | pthread_mutex_unlock(socket->lock); | |
438 | return ret; | |
439 | } | |
440 | ||
441 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
442 | struct ltt_kernel_metadata *metadata) | |
443 | { | |
444 | int ret; | |
445 | struct lttcomm_consumer_msg msg; | |
446 | ||
447 | assert(metadata); | |
448 | assert(socket); | |
07b86b52 JD |
449 | |
450 | DBG("Sending kernel consumer destroy channel key %d", metadata->fd); | |
451 | ||
53efb85a | 452 | memset(&msg, 0, sizeof(msg)); |
07b86b52 JD |
453 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
454 | msg.u.destroy_channel.key = metadata->fd; | |
455 | ||
456 | pthread_mutex_lock(socket->lock); | |
457 | health_code_update(); | |
458 | ||
459 | ret = consumer_send_msg(socket, &msg); | |
460 | if (ret < 0) { | |
461 | goto error; | |
462 | } | |
463 | ||
464 | error: | |
465 | health_code_update(); | |
466 | pthread_mutex_unlock(socket->lock); | |
467 | return ret; | |
468 | } |