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 | ||
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. */ | |
108 | pathname = ""; | |
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 DG |
138 | error: |
139 | return ret; | |
140 | } | |
141 | ||
142 | /* | |
143 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
144 | */ | |
f50f23d9 | 145 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
2bba9e53 | 146 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
147 | { |
148 | int ret; | |
2bba9e53 | 149 | char *pathname; |
00e2e675 | 150 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 151 | struct consumer_output *consumer; |
00e2e675 DG |
152 | |
153 | /* Safety net */ | |
154 | assert(session); | |
155 | assert(session->consumer); | |
f50f23d9 | 156 | assert(sock); |
00e2e675 DG |
157 | |
158 | DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd); | |
159 | ||
160 | /* Get consumer output pointer */ | |
a7d9a3e7 | 161 | consumer = session->consumer; |
00e2e675 | 162 | |
2bba9e53 DG |
163 | if (monitor) { |
164 | pathname = create_channel_path(consumer, session->uid, session->gid); | |
165 | if (!pathname) { | |
166 | ret = -1; | |
a7d9a3e7 DG |
167 | goto error; |
168 | } | |
00e2e675 | 169 | } else { |
2bba9e53 DG |
170 | /* Empty path. */ |
171 | pathname = ""; | |
00e2e675 DG |
172 | } |
173 | ||
174 | /* Prep channel message structure */ | |
175 | consumer_init_channel_comm_msg(&lkm, | |
176 | LTTNG_CONSUMER_ADD_CHANNEL, | |
177 | session->metadata->fd, | |
ffe60014 DG |
178 | session->id, |
179 | pathname, | |
180 | session->uid, | |
181 | session->gid, | |
182 | consumer->net_seq_index, | |
30079b6b | 183 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
184 | 1, |
185 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 186 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 187 | 0, 0, |
ecc48a90 | 188 | monitor, 0); |
00e2e675 | 189 | |
840cb59c | 190 | health_code_update(); |
ca03de58 | 191 | |
00e2e675 DG |
192 | ret = consumer_send_channel(sock, &lkm); |
193 | if (ret < 0) { | |
194 | goto error; | |
195 | } | |
196 | ||
840cb59c | 197 | health_code_update(); |
ca03de58 | 198 | |
00e2e675 DG |
199 | /* Prep stream message structure */ |
200 | consumer_init_stream_comm_msg(&lkm, | |
201 | LTTNG_CONSUMER_ADD_STREAM, | |
202 | session->metadata->fd, | |
203 | session->metadata_stream_fd, | |
1624d5b7 | 204 | 0); /* CPU: 0 for metadata. */ |
00e2e675 | 205 | |
840cb59c | 206 | health_code_update(); |
ca03de58 | 207 | |
00e2e675 | 208 | /* Send stream and file descriptor */ |
a7d9a3e7 | 209 | ret = consumer_send_stream(sock, consumer, &lkm, |
00e2e675 DG |
210 | &session->metadata_stream_fd, 1); |
211 | if (ret < 0) { | |
212 | goto error; | |
213 | } | |
214 | ||
840cb59c | 215 | health_code_update(); |
ca03de58 | 216 | |
00e2e675 DG |
217 | error: |
218 | return ret; | |
219 | } | |
220 | ||
221 | /* | |
222 | * Sending a single stream to the consumer with command ADD_STREAM. | |
223 | */ | |
f50f23d9 DG |
224 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
225 | struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream, | |
2bba9e53 | 226 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
227 | { |
228 | int ret; | |
00e2e675 | 229 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 230 | struct consumer_output *consumer; |
00e2e675 DG |
231 | |
232 | assert(channel); | |
233 | assert(stream); | |
234 | assert(session); | |
235 | assert(session->consumer); | |
f50f23d9 | 236 | assert(sock); |
00e2e675 DG |
237 | |
238 | DBG("Sending stream %d of channel %s to kernel consumer", | |
239 | stream->fd, channel->channel->name); | |
240 | ||
241 | /* Get consumer output pointer */ | |
a7d9a3e7 | 242 | consumer = session->consumer; |
00e2e675 | 243 | |
00e2e675 | 244 | /* Prep stream consumer message */ |
ffe60014 DG |
245 | consumer_init_stream_comm_msg(&lkm, |
246 | LTTNG_CONSUMER_ADD_STREAM, | |
00e2e675 DG |
247 | channel->fd, |
248 | stream->fd, | |
ffe60014 | 249 | stream->cpu); |
00e2e675 | 250 | |
840cb59c | 251 | health_code_update(); |
ca03de58 | 252 | |
00e2e675 | 253 | /* Send stream and file descriptor */ |
a7d9a3e7 | 254 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
255 | if (ret < 0) { |
256 | goto error; | |
257 | } | |
258 | ||
840cb59c | 259 | health_code_update(); |
ca03de58 | 260 | |
00e2e675 DG |
261 | error: |
262 | return ret; | |
263 | } | |
264 | ||
f1e16794 DG |
265 | /* |
266 | * Send all stream fds of kernel channel to the consumer. | |
267 | */ | |
f50f23d9 | 268 | int kernel_consumer_send_channel_stream(struct consumer_socket *sock, |
2bba9e53 DG |
269 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *session, |
270 | unsigned int monitor) | |
f1e16794 | 271 | { |
00e2e675 | 272 | int ret; |
f1e16794 | 273 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
274 | |
275 | /* Safety net */ | |
276 | assert(channel); | |
277 | assert(session); | |
278 | assert(session->consumer); | |
f50f23d9 | 279 | assert(sock); |
00e2e675 DG |
280 | |
281 | /* Bail out if consumer is disabled */ | |
282 | if (!session->consumer->enabled) { | |
f73fabfd | 283 | ret = LTTNG_OK; |
00e2e675 DG |
284 | goto error; |
285 | } | |
f1e16794 DG |
286 | |
287 | DBG("Sending streams of channel %s to kernel consumer", | |
288 | channel->channel->name); | |
289 | ||
2bba9e53 | 290 | ret = kernel_consumer_add_channel(sock, channel, session, monitor); |
f1e16794 | 291 | if (ret < 0) { |
f1e16794 DG |
292 | goto error; |
293 | } | |
294 | ||
295 | /* Send streams */ | |
296 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
297 | if (!stream->fd) { | |
298 | continue; | |
299 | } | |
00e2e675 DG |
300 | |
301 | /* Add stream on the kernel consumer side. */ | |
2bba9e53 DG |
302 | ret = kernel_consumer_add_stream(sock, channel, stream, session, |
303 | monitor); | |
f1e16794 | 304 | if (ret < 0) { |
f1e16794 DG |
305 | goto error; |
306 | } | |
307 | } | |
308 | ||
f1e16794 DG |
309 | error: |
310 | return ret; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Send all stream fds of the kernel session to the consumer. | |
315 | */ | |
f50f23d9 DG |
316 | int kernel_consumer_send_session(struct consumer_socket *sock, |
317 | struct ltt_kernel_session *session) | |
f1e16794 | 318 | { |
2bba9e53 | 319 | int ret, monitor = 0; |
f1e16794 | 320 | struct ltt_kernel_channel *chan; |
f1e16794 | 321 | |
00e2e675 DG |
322 | /* Safety net */ |
323 | assert(session); | |
324 | assert(session->consumer); | |
f50f23d9 | 325 | assert(sock); |
f1e16794 | 326 | |
00e2e675 DG |
327 | /* Bail out if consumer is disabled */ |
328 | if (!session->consumer->enabled) { | |
f73fabfd | 329 | ret = LTTNG_OK; |
00e2e675 | 330 | goto error; |
f1e16794 DG |
331 | } |
332 | ||
2bba9e53 DG |
333 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
334 | if (session->output_traces) { | |
335 | monitor = 1; | |
336 | } | |
337 | ||
00e2e675 DG |
338 | DBG("Sending session stream to kernel consumer"); |
339 | ||
f1e16794 | 340 | if (session->metadata_stream_fd >= 0) { |
2bba9e53 | 341 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 342 | if (ret < 0) { |
f1e16794 DG |
343 | goto error; |
344 | } | |
345 | ||
00e2e675 DG |
346 | /* Flag that at least the metadata has been sent to the consumer. */ |
347 | session->consumer_fds_sent = 1; | |
f1e16794 DG |
348 | } |
349 | ||
00e2e675 | 350 | /* Send channel and streams of it */ |
f1e16794 | 351 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bba9e53 DG |
352 | ret = kernel_consumer_send_channel_stream(sock, chan, session, |
353 | monitor); | |
f1e16794 DG |
354 | if (ret < 0) { |
355 | goto error; | |
356 | } | |
357 | } | |
358 | ||
00e2e675 | 359 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 DG |
360 | |
361 | return 0; | |
362 | ||
363 | error: | |
364 | return ret; | |
365 | } | |
07b86b52 JD |
366 | |
367 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
368 | struct ltt_kernel_channel *channel) | |
369 | { | |
370 | int ret; | |
371 | struct lttcomm_consumer_msg msg; | |
372 | ||
373 | assert(channel); | |
374 | assert(socket); | |
07b86b52 JD |
375 | |
376 | DBG("Sending kernel consumer destroy channel key %d", channel->fd); | |
377 | ||
378 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; | |
379 | msg.u.destroy_channel.key = channel->fd; | |
380 | ||
381 | pthread_mutex_lock(socket->lock); | |
382 | health_code_update(); | |
383 | ||
384 | ret = consumer_send_msg(socket, &msg); | |
385 | if (ret < 0) { | |
386 | goto error; | |
387 | } | |
388 | ||
389 | error: | |
390 | health_code_update(); | |
391 | pthread_mutex_unlock(socket->lock); | |
392 | return ret; | |
393 | } | |
394 | ||
395 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
396 | struct ltt_kernel_metadata *metadata) | |
397 | { | |
398 | int ret; | |
399 | struct lttcomm_consumer_msg msg; | |
400 | ||
401 | assert(metadata); | |
402 | assert(socket); | |
07b86b52 JD |
403 | |
404 | DBG("Sending kernel consumer destroy channel key %d", metadata->fd); | |
405 | ||
406 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; | |
407 | msg.u.destroy_channel.key = metadata->fd; | |
408 | ||
409 | pthread_mutex_lock(socket->lock); | |
410 | health_code_update(); | |
411 | ||
412 | ret = consumer_send_msg(socket, &msg); | |
413 | if (ret < 0) { | |
414 | goto error; | |
415 | } | |
416 | ||
417 | error: | |
418 | health_code_update(); | |
419 | pthread_mutex_unlock(socket->lock); | |
420 | return ret; | |
421 | } |