Commit | Line | Data |
---|---|---|
f1e16794 | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2012 David Goulet <dgoulet@efficios.com> |
f1e16794 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
f1e16794 | 5 | * |
f1e16794 DG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
f1e16794 DG |
9 | #include <stdio.h> |
10 | #include <stdlib.h> | |
f1e16794 DG |
11 | #include <sys/stat.h> |
12 | #include <unistd.h> | |
e1f3997a | 13 | #include <inttypes.h> |
f1e16794 DG |
14 | |
15 | #include <common/common.h> | |
16 | #include <common/defaults.h> | |
f5436bfc | 17 | #include <common/compat/string.h> |
f1e16794 | 18 | |
00e2e675 | 19 | #include "consumer.h" |
8782cc74 | 20 | #include "health-sessiond.h" |
f1e16794 | 21 | #include "kernel-consumer.h" |
e9404c27 JG |
22 | #include "notification-thread-commands.h" |
23 | #include "session.h" | |
24 | #include "lttng-sessiond.h" | |
f1e16794 | 25 | |
5da88b0f MD |
26 | static char *create_channel_path(struct consumer_output *consumer, |
27 | size_t *consumer_path_offset) | |
00e2e675 DG |
28 | { |
29 | int ret; | |
ffe60014 | 30 | char tmp_path[PATH_MAX]; |
2bba9e53 | 31 | char *pathname = NULL; |
00e2e675 | 32 | |
2bba9e53 | 33 | assert(consumer); |
00e2e675 | 34 | |
ffe60014 | 35 | /* Get the right path name destination */ |
a5ba6fdd JG |
36 | if (consumer->type == CONSUMER_DST_LOCAL || |
37 | (consumer->type == CONSUMER_DST_NET && | |
38 | consumer->relay_major_version == 2 && | |
39 | consumer->relay_minor_version >= 11)) { | |
d2956687 | 40 | pathname = strdup(consumer->domain_subdir); |
bb3c4e70 | 41 | if (!pathname) { |
d2956687 JG |
42 | PERROR("Failed to copy domain subdirectory string %s", |
43 | consumer->domain_subdir); | |
bb3c4e70 MD |
44 | goto error; |
45 | } | |
5da88b0f | 46 | *consumer_path_offset = strlen(consumer->domain_subdir); |
d2956687 JG |
47 | DBG3("Kernel local consumer trace path relative to current trace chunk: \"%s\"", |
48 | pathname); | |
ffe60014 | 49 | } else { |
5da88b0f | 50 | /* Network output, relayd < 2.11. */ |
2b29c638 JD |
51 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s", |
52 | consumer->dst.net.base_dir, | |
b178f53e | 53 | consumer->domain_subdir); |
ffe60014 | 54 | if (ret < 0) { |
2bba9e53 | 55 | PERROR("snprintf kernel metadata path"); |
ffe60014 | 56 | goto error; |
dba13f1d JG |
57 | } else if (ret >= sizeof(tmp_path)) { |
58 | ERR("Kernel channel path exceeds the maximal allowed length of of %zu bytes (%i bytes required) with path \"%s%s\"", | |
59 | sizeof(tmp_path), ret, | |
60 | consumer->dst.net.base_dir, | |
b178f53e | 61 | consumer->domain_subdir); |
dba13f1d | 62 | goto error; |
ffe60014 | 63 | } |
f5436bfc | 64 | pathname = lttng_strndup(tmp_path, sizeof(tmp_path)); |
bb3c4e70 | 65 | if (!pathname) { |
f5436bfc | 66 | PERROR("lttng_strndup"); |
bb3c4e70 MD |
67 | goto error; |
68 | } | |
5da88b0f | 69 | *consumer_path_offset = 0; |
ffe60014 DG |
70 | DBG3("Kernel network consumer subdir path: %s", pathname); |
71 | } | |
72 | ||
2bba9e53 DG |
73 | return pathname; |
74 | ||
75 | error: | |
76 | free(pathname); | |
77 | return NULL; | |
78 | } | |
79 | ||
80 | /* | |
81 | * Sending a single channel to the consumer with command ADD_CHANNEL. | |
82 | */ | |
ba27cd00 | 83 | static |
2bba9e53 | 84 | int kernel_consumer_add_channel(struct consumer_socket *sock, |
e9404c27 JG |
85 | struct ltt_kernel_channel *channel, |
86 | struct ltt_kernel_session *ksession, | |
2bba9e53 DG |
87 | unsigned int monitor) |
88 | { | |
89 | int ret; | |
d2956687 | 90 | char *pathname = NULL; |
2bba9e53 DG |
91 | struct lttcomm_consumer_msg lkm; |
92 | struct consumer_output *consumer; | |
e9404c27 | 93 | enum lttng_error_code status; |
e32d7f27 | 94 | struct ltt_session *session = NULL; |
e9404c27 | 95 | struct lttng_channel_extended *channel_attr_extended; |
d2956687 | 96 | bool is_local_trace; |
5da88b0f | 97 | size_t consumer_path_offset = 0; |
2bba9e53 DG |
98 | |
99 | /* Safety net */ | |
100 | assert(channel); | |
e9404c27 JG |
101 | assert(ksession); |
102 | assert(ksession->consumer); | |
2bba9e53 | 103 | |
e9404c27 JG |
104 | consumer = ksession->consumer; |
105 | channel_attr_extended = (struct lttng_channel_extended *) | |
106 | channel->channel->attr.extended.ptr; | |
2bba9e53 DG |
107 | |
108 | DBG("Kernel consumer adding channel %s to kernel consumer", | |
109 | channel->channel->name); | |
d2956687 | 110 | is_local_trace = consumer->net_seq_index == -1ULL; |
2bba9e53 | 111 | |
5da88b0f | 112 | pathname = create_channel_path(consumer, &consumer_path_offset); |
bb3c4e70 MD |
113 | if (!pathname) { |
114 | ret = -1; | |
115 | goto error; | |
116 | } | |
2bba9e53 | 117 | |
d2956687 JG |
118 | if (is_local_trace && ksession->current_trace_chunk) { |
119 | enum lttng_trace_chunk_status chunk_status; | |
120 | char *pathname_index; | |
121 | ||
122 | ret = asprintf(&pathname_index, "%s/" DEFAULT_INDEX_DIR, | |
123 | pathname); | |
124 | if (ret < 0) { | |
125 | ERR("Failed to format channel index directory"); | |
126 | ret = -1; | |
127 | goto error; | |
128 | } | |
129 | ||
130 | /* | |
131 | * Create the index subdirectory which will take care | |
132 | * of implicitly creating the channel's path. | |
133 | */ | |
134 | chunk_status = lttng_trace_chunk_create_subdirectory( | |
135 | ksession->current_trace_chunk, pathname_index); | |
136 | free(pathname_index); | |
137 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
138 | ret = -1; | |
139 | goto error; | |
140 | } | |
141 | } | |
142 | ||
00e2e675 | 143 | /* Prep channel message structure */ |
638e7b4e | 144 | consumer_init_add_channel_comm_msg(&lkm, |
e1f3997a | 145 | channel->key, |
e9404c27 | 146 | ksession->id, |
5da88b0f | 147 | &pathname[consumer_path_offset], |
e9404c27 JG |
148 | ksession->uid, |
149 | ksession->gid, | |
ffe60014 | 150 | consumer->net_seq_index, |
c30aaa51 | 151 | channel->channel->name, |
ffe60014 DG |
152 | channel->stream_count, |
153 | channel->channel->attr.output, | |
1624d5b7 JD |
154 | CONSUMER_CHANNEL_TYPE_DATA, |
155 | channel->channel->attr.tracefile_size, | |
2bba9e53 | 156 | channel->channel->attr.tracefile_count, |
ecc48a90 | 157 | monitor, |
e9404c27 | 158 | channel->channel->attr.live_timer_interval, |
d2956687 JG |
159 | channel_attr_extended->monitor_timer_interval, |
160 | ksession->current_trace_chunk); | |
00e2e675 | 161 | |
840cb59c | 162 | health_code_update(); |
ca03de58 | 163 | |
00e2e675 DG |
164 | ret = consumer_send_channel(sock, &lkm); |
165 | if (ret < 0) { | |
166 | goto error; | |
167 | } | |
168 | ||
840cb59c | 169 | health_code_update(); |
e9404c27 JG |
170 | rcu_read_lock(); |
171 | session = session_find_by_id(ksession->id); | |
172 | assert(session); | |
e098433c JG |
173 | assert(pthread_mutex_trylock(&session->lock)); |
174 | assert(session_trylock_list()); | |
ca03de58 | 175 | |
e9404c27 JG |
176 | status = notification_thread_command_add_channel( |
177 | notification_thread_handle, session->name, | |
178 | ksession->uid, ksession->gid, | |
e1f3997a | 179 | channel->channel->name, channel->key, |
e9404c27 JG |
180 | LTTNG_DOMAIN_KERNEL, |
181 | channel->channel->attr.subbuf_size * channel->channel->attr.num_subbuf); | |
182 | rcu_read_unlock(); | |
183 | if (status != LTTNG_OK) { | |
184 | ret = -1; | |
185 | goto error; | |
186 | } | |
753873bf JR |
187 | |
188 | channel->published_to_notification_thread = true; | |
189 | ||
00e2e675 | 190 | error: |
e32d7f27 JG |
191 | if (session) { |
192 | session_put(session); | |
193 | } | |
53efb85a | 194 | free(pathname); |
00e2e675 DG |
195 | return ret; |
196 | } | |
197 | ||
198 | /* | |
199 | * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM. | |
9a318688 JG |
200 | * |
201 | * The consumer socket lock must be held by the caller. | |
00e2e675 | 202 | */ |
f50f23d9 | 203 | int kernel_consumer_add_metadata(struct consumer_socket *sock, |
e098433c | 204 | struct ltt_kernel_session *ksession, unsigned int monitor) |
00e2e675 DG |
205 | { |
206 | int ret; | |
00e2e675 | 207 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 208 | struct consumer_output *consumer; |
e098433c JG |
209 | |
210 | rcu_read_lock(); | |
00e2e675 DG |
211 | |
212 | /* Safety net */ | |
e098433c JG |
213 | assert(ksession); |
214 | assert(ksession->consumer); | |
f50f23d9 | 215 | assert(sock); |
00e2e675 | 216 | |
e098433c JG |
217 | DBG("Sending metadata %d to kernel consumer", |
218 | ksession->metadata_stream_fd); | |
00e2e675 DG |
219 | |
220 | /* Get consumer output pointer */ | |
e098433c | 221 | consumer = ksession->consumer; |
00e2e675 | 222 | |
00e2e675 | 223 | /* Prep channel message structure */ |
638e7b4e | 224 | consumer_init_add_channel_comm_msg(&lkm, |
e098433c JG |
225 | ksession->metadata->key, |
226 | ksession->id, | |
5da88b0f | 227 | "", |
e098433c JG |
228 | ksession->uid, |
229 | ksession->gid, | |
ffe60014 | 230 | consumer->net_seq_index, |
30079b6b | 231 | DEFAULT_METADATA_NAME, |
ffe60014 DG |
232 | 1, |
233 | DEFAULT_KERNEL_CHANNEL_OUTPUT, | |
1624d5b7 | 234 | CONSUMER_CHANNEL_TYPE_METADATA, |
2bba9e53 | 235 | 0, 0, |
d2956687 | 236 | monitor, 0, 0, ksession->current_trace_chunk); |
00e2e675 | 237 | |
840cb59c | 238 | health_code_update(); |
ca03de58 | 239 | |
00e2e675 DG |
240 | ret = consumer_send_channel(sock, &lkm); |
241 | if (ret < 0) { | |
242 | goto error; | |
243 | } | |
244 | ||
840cb59c | 245 | health_code_update(); |
ca03de58 | 246 | |
00e2e675 | 247 | /* Prep stream message structure */ |
e098433c JG |
248 | consumer_init_add_stream_comm_msg(&lkm, |
249 | ksession->metadata->key, | |
250 | ksession->metadata_stream_fd, | |
d2956687 | 251 | 0 /* CPU: 0 for metadata. */); |
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, |
e098433c | 257 | &ksession->metadata_stream_fd, 1); |
00e2e675 DG |
258 | if (ret < 0) { |
259 | goto error; | |
260 | } | |
261 | ||
840cb59c | 262 | health_code_update(); |
ca03de58 | 263 | |
00e2e675 | 264 | error: |
e098433c | 265 | rcu_read_unlock(); |
00e2e675 DG |
266 | return ret; |
267 | } | |
268 | ||
269 | /* | |
270 | * Sending a single stream to the consumer with command ADD_STREAM. | |
271 | */ | |
5b0e3ccb | 272 | static |
f50f23d9 | 273 | int kernel_consumer_add_stream(struct consumer_socket *sock, |
e098433c JG |
274 | struct ltt_kernel_channel *channel, |
275 | struct ltt_kernel_stream *stream, | |
d2956687 | 276 | struct ltt_kernel_session *session, unsigned int monitor) |
00e2e675 DG |
277 | { |
278 | int ret; | |
00e2e675 | 279 | struct lttcomm_consumer_msg lkm; |
a7d9a3e7 | 280 | struct consumer_output *consumer; |
00e2e675 DG |
281 | |
282 | assert(channel); | |
283 | assert(stream); | |
284 | assert(session); | |
285 | assert(session->consumer); | |
f50f23d9 | 286 | assert(sock); |
00e2e675 DG |
287 | |
288 | DBG("Sending stream %d of channel %s to kernel consumer", | |
289 | stream->fd, channel->channel->name); | |
290 | ||
291 | /* Get consumer output pointer */ | |
a7d9a3e7 | 292 | consumer = session->consumer; |
00e2e675 | 293 | |
00e2e675 | 294 | /* Prep stream consumer message */ |
e098433c | 295 | consumer_init_add_stream_comm_msg(&lkm, |
e1f3997a | 296 | channel->key, |
00e2e675 | 297 | stream->fd, |
d2956687 | 298 | stream->cpu); |
00e2e675 | 299 | |
840cb59c | 300 | health_code_update(); |
ca03de58 | 301 | |
00e2e675 | 302 | /* Send stream and file descriptor */ |
a7d9a3e7 | 303 | ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1); |
00e2e675 DG |
304 | if (ret < 0) { |
305 | goto error; | |
306 | } | |
307 | ||
840cb59c | 308 | health_code_update(); |
ca03de58 | 309 | |
00e2e675 DG |
310 | error: |
311 | return ret; | |
312 | } | |
313 | ||
a4baae1b JD |
314 | /* |
315 | * Sending the notification that all streams were sent with STREAMS_SENT. | |
316 | */ | |
317 | int kernel_consumer_streams_sent(struct consumer_socket *sock, | |
318 | struct ltt_kernel_session *session, uint64_t channel_key) | |
319 | { | |
320 | int ret; | |
321 | struct lttcomm_consumer_msg lkm; | |
322 | struct consumer_output *consumer; | |
323 | ||
324 | assert(sock); | |
325 | assert(session); | |
326 | ||
327 | DBG("Sending streams_sent"); | |
328 | /* Get consumer output pointer */ | |
329 | consumer = session->consumer; | |
330 | ||
331 | /* Prep stream consumer message */ | |
332 | consumer_init_streams_sent_comm_msg(&lkm, | |
333 | LTTNG_CONSUMER_STREAMS_SENT, | |
334 | channel_key, consumer->net_seq_index); | |
335 | ||
336 | health_code_update(); | |
337 | ||
338 | /* Send stream and file descriptor */ | |
339 | ret = consumer_send_msg(sock, &lkm); | |
340 | if (ret < 0) { | |
341 | goto error; | |
342 | } | |
343 | ||
344 | error: | |
345 | return ret; | |
346 | } | |
347 | ||
f1e16794 DG |
348 | /* |
349 | * Send all stream fds of kernel channel to the consumer. | |
9a318688 JG |
350 | * |
351 | * The consumer socket lock must be held by the caller. | |
f1e16794 | 352 | */ |
1fc1b7c8 | 353 | int kernel_consumer_send_channel_streams(struct consumer_socket *sock, |
e098433c | 354 | struct ltt_kernel_channel *channel, struct ltt_kernel_session *ksession, |
2bba9e53 | 355 | unsigned int monitor) |
f1e16794 | 356 | { |
e99f9447 | 357 | int ret = LTTNG_OK; |
f1e16794 | 358 | struct ltt_kernel_stream *stream; |
00e2e675 DG |
359 | |
360 | /* Safety net */ | |
361 | assert(channel); | |
e098433c JG |
362 | assert(ksession); |
363 | assert(ksession->consumer); | |
f50f23d9 | 364 | assert(sock); |
00e2e675 | 365 | |
e098433c JG |
366 | rcu_read_lock(); |
367 | ||
00e2e675 | 368 | /* Bail out if consumer is disabled */ |
e098433c | 369 | if (!ksession->consumer->enabled) { |
f73fabfd | 370 | ret = LTTNG_OK; |
00e2e675 DG |
371 | goto error; |
372 | } | |
f1e16794 DG |
373 | |
374 | DBG("Sending streams of channel %s to kernel consumer", | |
375 | channel->channel->name); | |
376 | ||
e99f9447 | 377 | if (!channel->sent_to_consumer) { |
e098433c | 378 | ret = kernel_consumer_add_channel(sock, channel, ksession, monitor); |
e99f9447 MD |
379 | if (ret < 0) { |
380 | goto error; | |
381 | } | |
382 | channel->sent_to_consumer = true; | |
f1e16794 DG |
383 | } |
384 | ||
385 | /* Send streams */ | |
386 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
6986ab9b | 387 | if (!stream->fd || stream->sent_to_consumer) { |
f1e16794 DG |
388 | continue; |
389 | } | |
00e2e675 DG |
390 | |
391 | /* Add stream on the kernel consumer side. */ | |
e098433c | 392 | ret = kernel_consumer_add_stream(sock, channel, stream, |
d2956687 | 393 | ksession, monitor); |
f1e16794 | 394 | if (ret < 0) { |
f1e16794 DG |
395 | goto error; |
396 | } | |
6986ab9b | 397 | stream->sent_to_consumer = true; |
f1e16794 DG |
398 | } |
399 | ||
f1e16794 | 400 | error: |
e098433c | 401 | rcu_read_unlock(); |
f1e16794 DG |
402 | return ret; |
403 | } | |
404 | ||
405 | /* | |
406 | * Send all stream fds of the kernel session to the consumer. | |
9a318688 JG |
407 | * |
408 | * The consumer socket lock must be held by the caller. | |
f1e16794 | 409 | */ |
f50f23d9 DG |
410 | int kernel_consumer_send_session(struct consumer_socket *sock, |
411 | struct ltt_kernel_session *session) | |
f1e16794 | 412 | { |
2bba9e53 | 413 | int ret, monitor = 0; |
f1e16794 | 414 | struct ltt_kernel_channel *chan; |
f1e16794 | 415 | |
00e2e675 DG |
416 | /* Safety net */ |
417 | assert(session); | |
418 | assert(session->consumer); | |
f50f23d9 | 419 | assert(sock); |
f1e16794 | 420 | |
00e2e675 DG |
421 | /* Bail out if consumer is disabled */ |
422 | if (!session->consumer->enabled) { | |
f73fabfd | 423 | ret = LTTNG_OK; |
00e2e675 | 424 | goto error; |
f1e16794 DG |
425 | } |
426 | ||
2bba9e53 DG |
427 | /* Don't monitor the streams on the consumer if in flight recorder. */ |
428 | if (session->output_traces) { | |
429 | monitor = 1; | |
430 | } | |
431 | ||
00e2e675 DG |
432 | DBG("Sending session stream to kernel consumer"); |
433 | ||
609af759 | 434 | if (session->metadata_stream_fd >= 0 && session->metadata) { |
2bba9e53 | 435 | ret = kernel_consumer_add_metadata(sock, session, monitor); |
f1e16794 | 436 | if (ret < 0) { |
f1e16794 DG |
437 | goto error; |
438 | } | |
f1e16794 DG |
439 | } |
440 | ||
00e2e675 | 441 | /* Send channel and streams of it */ |
f1e16794 | 442 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
1fc1b7c8 | 443 | ret = kernel_consumer_send_channel_streams(sock, chan, session, |
2bba9e53 | 444 | monitor); |
f1e16794 DG |
445 | if (ret < 0) { |
446 | goto error; | |
447 | } | |
601262d6 JD |
448 | if (monitor) { |
449 | /* | |
450 | * Inform the relay that all the streams for the | |
451 | * channel were sent. | |
452 | */ | |
e1f3997a | 453 | ret = kernel_consumer_streams_sent(sock, session, chan->key); |
601262d6 JD |
454 | if (ret < 0) { |
455 | goto error; | |
456 | } | |
457 | } | |
f1e16794 DG |
458 | } |
459 | ||
00e2e675 | 460 | DBG("Kernel consumer FDs of metadata and channel streams sent"); |
f1e16794 | 461 | |
4ce9ff51 | 462 | session->consumer_fds_sent = 1; |
f1e16794 DG |
463 | return 0; |
464 | ||
465 | error: | |
466 | return ret; | |
467 | } | |
07b86b52 JD |
468 | |
469 | int kernel_consumer_destroy_channel(struct consumer_socket *socket, | |
470 | struct ltt_kernel_channel *channel) | |
471 | { | |
472 | int ret; | |
473 | struct lttcomm_consumer_msg msg; | |
474 | ||
475 | assert(channel); | |
476 | assert(socket); | |
07b86b52 | 477 | |
e1f3997a | 478 | DBG("Sending kernel consumer destroy channel key %" PRIu64, channel->key); |
07b86b52 | 479 | |
53efb85a | 480 | memset(&msg, 0, sizeof(msg)); |
07b86b52 | 481 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
e1f3997a | 482 | msg.u.destroy_channel.key = channel->key; |
07b86b52 JD |
483 | |
484 | pthread_mutex_lock(socket->lock); | |
485 | health_code_update(); | |
486 | ||
487 | ret = consumer_send_msg(socket, &msg); | |
488 | if (ret < 0) { | |
489 | goto error; | |
490 | } | |
491 | ||
492 | error: | |
493 | health_code_update(); | |
494 | pthread_mutex_unlock(socket->lock); | |
495 | return ret; | |
496 | } | |
497 | ||
498 | int kernel_consumer_destroy_metadata(struct consumer_socket *socket, | |
499 | struct ltt_kernel_metadata *metadata) | |
500 | { | |
501 | int ret; | |
502 | struct lttcomm_consumer_msg msg; | |
503 | ||
504 | assert(metadata); | |
505 | assert(socket); | |
07b86b52 | 506 | |
d40f0359 | 507 | DBG("Sending kernel consumer destroy channel key %" PRIu64, metadata->key); |
07b86b52 | 508 | |
53efb85a | 509 | memset(&msg, 0, sizeof(msg)); |
07b86b52 | 510 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
d40f0359 | 511 | msg.u.destroy_channel.key = metadata->key; |
07b86b52 JD |
512 | |
513 | pthread_mutex_lock(socket->lock); | |
514 | health_code_update(); | |
515 | ||
516 | ret = consumer_send_msg(socket, &msg); | |
517 | if (ret < 0) { | |
518 | goto error; | |
519 | } | |
520 | ||
521 | error: | |
522 | health_code_update(); | |
523 | pthread_mutex_unlock(socket->lock); | |
524 | return ret; | |
525 | } |