Commit | Line | Data |
---|---|---|
48842b30 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
48842b30 | 7 | * |
d14d33bf AM |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
48842b30 | 12 | * |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
48842b30 DG |
16 | */ |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
48842b30 DG |
19 | #include <errno.h> |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
d88aee68 | 24 | #include <inttypes.h> |
48842b30 | 25 | |
990570ed | 26 | #include <common/common.h> |
c8fea79c | 27 | #include <common/consumer/consumer.h> |
990570ed | 28 | #include <common/defaults.h> |
48842b30 | 29 | |
00e2e675 | 30 | #include "consumer.h" |
8782cc74 | 31 | #include "health-sessiond.h" |
48842b30 | 32 | #include "ust-consumer.h" |
331744e3 JD |
33 | #include "buffer-registry.h" |
34 | #include "session.h" | |
e9404c27 | 35 | #include "lttng-sessiond.h" |
48842b30 DG |
36 | |
37 | /* | |
ffe60014 DG |
38 | * Return allocated full pathname of the session using the consumer trace path |
39 | * and subdir if available. On a successful allocation, the directory of the | |
40 | * trace is created with the session credentials. | |
41 | * | |
42 | * The caller can safely free(3) the returned value. On error, NULL is | |
43 | * returned. | |
48842b30 | 44 | */ |
ffe60014 DG |
45 | static char *setup_trace_path(struct consumer_output *consumer, |
46 | struct ust_app_session *ua_sess) | |
48842b30 | 47 | { |
ffe60014 DG |
48 | int ret; |
49 | char *pathname; | |
37278a1e | 50 | |
ffe60014 DG |
51 | assert(consumer); |
52 | assert(ua_sess); | |
00e2e675 | 53 | |
840cb59c | 54 | health_code_update(); |
ca03de58 | 55 | |
61ba6b6d JG |
56 | /* |
57 | * Allocate the string ourself to make sure we never exceed | |
58 | * LTTNG_PATH_MAX. | |
59 | */ | |
60 | pathname = zmalloc(LTTNG_PATH_MAX); | |
ffe60014 | 61 | if (!pathname) { |
48842b30 DG |
62 | goto error; |
63 | } | |
00e2e675 | 64 | |
ffe60014 DG |
65 | /* Get correct path name destination */ |
66 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
67 | /* Set application path to the destination path */ | |
61ba6b6d | 68 | ret = snprintf(pathname, LTTNG_PATH_MAX, "%s%s%s%s", |
366a9222 JD |
69 | consumer->dst.session_root_path, |
70 | consumer->chunk_path, | |
71 | consumer->subdir, ua_sess->path); | |
ffe60014 DG |
72 | if (ret < 0) { |
73 | PERROR("snprintf channel path"); | |
74 | goto error; | |
75 | } | |
ca03de58 | 76 | |
ffe60014 | 77 | /* Create directory. Ignore if exist. */ |
7972aab2 DG |
78 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, |
79 | ua_sess->euid, ua_sess->egid); | |
ffe60014 | 80 | if (ret < 0) { |
df5b86c8 | 81 | if (errno != EEXIST) { |
ffe60014 DG |
82 | ERR("Trace directory creation error"); |
83 | goto error; | |
84 | } | |
85 | } | |
86 | } else { | |
61ba6b6d | 87 | ret = snprintf(pathname, LTTNG_PATH_MAX, "%s%s%s%s", |
2b29c638 JD |
88 | consumer->dst.net.base_dir, |
89 | consumer->chunk_path, | |
90 | consumer->subdir, | |
ffe60014 DG |
91 | ua_sess->path); |
92 | if (ret < 0) { | |
93 | PERROR("snprintf channel path"); | |
94 | goto error; | |
95 | } | |
48842b30 DG |
96 | } |
97 | ||
ffe60014 | 98 | return pathname; |
ca03de58 | 99 | |
37278a1e | 100 | error: |
ffe60014 DG |
101 | free(pathname); |
102 | return NULL; | |
37278a1e DG |
103 | } |
104 | ||
105 | /* | |
e9404c27 | 106 | * Send a single channel to the consumer using command ASK_CHANNEL_CREATION. |
ffe60014 | 107 | * |
7972aab2 | 108 | * Consumer socket lock MUST be acquired before calling this. |
37278a1e | 109 | */ |
ffe60014 | 110 | static int ask_channel_creation(struct ust_app_session *ua_sess, |
e098433c JG |
111 | struct ust_app_channel *ua_chan, |
112 | struct consumer_output *consumer, | |
113 | struct consumer_socket *socket, | |
114 | struct ust_registry_session *registry, | |
115 | uint64_t trace_archive_id) | |
37278a1e | 116 | { |
0c759fc9 | 117 | int ret, output; |
7972aab2 DG |
118 | uint32_t chan_id; |
119 | uint64_t key, chan_reg_key; | |
ffe60014 | 120 | char *pathname = NULL; |
37278a1e | 121 | struct lttcomm_consumer_msg msg; |
7972aab2 | 122 | struct ust_registry_channel *chan_reg; |
d7ba1388 | 123 | char shm_path[PATH_MAX] = ""; |
3d071855 | 124 | char root_shm_path[PATH_MAX] = ""; |
37278a1e | 125 | |
ffe60014 DG |
126 | assert(ua_sess); |
127 | assert(ua_chan); | |
128 | assert(socket); | |
37278a1e | 129 | assert(consumer); |
7972aab2 | 130 | assert(registry); |
ffe60014 DG |
131 | |
132 | DBG2("Asking UST consumer for channel"); | |
133 | ||
134 | /* Get and create full trace path of session. */ | |
10a50311 JD |
135 | if (ua_sess->output_traces) { |
136 | pathname = setup_trace_path(consumer, ua_sess); | |
137 | if (!pathname) { | |
138 | ret = -1; | |
139 | goto error; | |
140 | } | |
ffe60014 DG |
141 | } |
142 | ||
7972aab2 DG |
143 | /* Depending on the buffer type, a different channel key is used. */ |
144 | if (ua_sess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
145 | chan_reg_key = ua_chan->tracing_channel_id; | |
146 | } else { | |
147 | chan_reg_key = ua_chan->key; | |
148 | } | |
149 | ||
150 | if (ua_chan->attr.type == LTTNG_UST_CHAN_METADATA) { | |
151 | chan_id = -1U; | |
d7ba1388 MD |
152 | /* |
153 | * Metadata channels shm_path (buffers) are handled within | |
154 | * session daemon. Consumer daemon should not try to create | |
155 | * those buffer files. | |
156 | */ | |
7972aab2 DG |
157 | } else { |
158 | chan_reg = ust_registry_channel_find(registry, chan_reg_key); | |
159 | assert(chan_reg); | |
160 | chan_id = chan_reg->chan_id; | |
d7ba1388 MD |
161 | if (ua_sess->shm_path[0]) { |
162 | strncpy(shm_path, ua_sess->shm_path, sizeof(shm_path)); | |
163 | shm_path[sizeof(shm_path) - 1] = '\0'; | |
164 | strncat(shm_path, "/", | |
165 | sizeof(shm_path) - strlen(shm_path) - 1); | |
166 | strncat(shm_path, ua_chan->name, | |
167 | sizeof(shm_path) - strlen(shm_path) - 1); | |
168 | strncat(shm_path, "_", | |
169 | sizeof(shm_path) - strlen(shm_path) - 1); | |
170 | } | |
3d071855 MD |
171 | strncpy(root_shm_path, ua_sess->root_shm_path, sizeof(root_shm_path)); |
172 | root_shm_path[sizeof(root_shm_path) - 1] = '\0'; | |
7972aab2 DG |
173 | } |
174 | ||
0c759fc9 DG |
175 | switch (ua_chan->attr.output) { |
176 | case LTTNG_UST_MMAP: | |
177 | default: | |
178 | output = LTTNG_EVENT_MMAP; | |
179 | break; | |
180 | } | |
181 | ||
ffe60014 DG |
182 | consumer_init_ask_channel_comm_msg(&msg, |
183 | ua_chan->attr.subbuf_size, | |
184 | ua_chan->attr.num_subbuf, | |
185 | ua_chan->attr.overwrite, | |
186 | ua_chan->attr.switch_timer_interval, | |
187 | ua_chan->attr.read_timer_interval, | |
ecc48a90 | 188 | ua_sess->live_timer_interval, |
e9404c27 | 189 | ua_chan->monitor_timer_interval, |
0c759fc9 | 190 | output, |
ffe60014 | 191 | (int) ua_chan->attr.type, |
7972aab2 | 192 | ua_sess->tracing_id, |
ca22feea | 193 | pathname, |
ffe60014 | 194 | ua_chan->name, |
7972aab2 DG |
195 | ua_sess->euid, |
196 | ua_sess->egid, | |
ffe60014 DG |
197 | consumer->net_seq_index, |
198 | ua_chan->key, | |
7972aab2 | 199 | registry->uuid, |
1624d5b7 JD |
200 | chan_id, |
201 | ua_chan->tracefile_size, | |
2bba9e53 | 202 | ua_chan->tracefile_count, |
1950109e | 203 | ua_sess->id, |
567eb353 | 204 | ua_sess->output_traces, |
d7ba1388 | 205 | ua_sess->uid, |
491d1539 | 206 | ua_chan->attr.blocking_timeout, |
e098433c JG |
207 | root_shm_path, shm_path, |
208 | trace_archive_id); | |
37278a1e | 209 | |
840cb59c | 210 | health_code_update(); |
ca03de58 | 211 | |
52898cb1 | 212 | ret = consumer_socket_send(socket, &msg, sizeof(msg)); |
37278a1e DG |
213 | if (ret < 0) { |
214 | goto error; | |
215 | } | |
216 | ||
ffe60014 DG |
217 | ret = consumer_recv_status_channel(socket, &key, |
218 | &ua_chan->expected_stream_count); | |
219 | if (ret < 0) { | |
220 | goto error; | |
221 | } | |
222 | /* Communication protocol error. */ | |
223 | assert(key == ua_chan->key); | |
224 | /* We need at least one where 1 stream for 1 cpu. */ | |
10a50311 JD |
225 | if (ua_sess->output_traces) { |
226 | assert(ua_chan->expected_stream_count > 0); | |
227 | } | |
ffe60014 | 228 | |
d88aee68 | 229 | DBG2("UST ask channel %" PRIu64 " successfully done with %u stream(s)", key, |
ffe60014 | 230 | ua_chan->expected_stream_count); |
ca03de58 | 231 | |
37278a1e | 232 | error: |
ffe60014 DG |
233 | free(pathname); |
234 | health_code_update(); | |
37278a1e DG |
235 | return ret; |
236 | } | |
237 | ||
238 | /* | |
ffe60014 DG |
239 | * Ask consumer to create a channel for a given session. |
240 | * | |
e9404c27 JG |
241 | * Session list and rcu read side locks must be held by the caller. |
242 | * | |
ffe60014 | 243 | * Returns 0 on success else a negative value. |
37278a1e | 244 | */ |
ffe60014 | 245 | int ust_consumer_ask_channel(struct ust_app_session *ua_sess, |
e098433c JG |
246 | struct ust_app_channel *ua_chan, |
247 | struct consumer_output *consumer, | |
248 | struct consumer_socket *socket, | |
249 | struct ust_registry_session *registry, | |
250 | uint64_t trace_archive_id) | |
37278a1e DG |
251 | { |
252 | int ret; | |
37278a1e | 253 | |
ffe60014 DG |
254 | assert(ua_sess); |
255 | assert(ua_chan); | |
256 | assert(consumer); | |
257 | assert(socket); | |
7972aab2 | 258 | assert(registry); |
f50f23d9 | 259 | |
d9078d0c DG |
260 | if (!consumer->enabled) { |
261 | ret = -LTTNG_ERR_NO_CONSUMER; | |
262 | DBG3("Consumer is disabled"); | |
263 | goto error; | |
264 | } | |
265 | ||
ffe60014 | 266 | pthread_mutex_lock(socket->lock); |
e098433c JG |
267 | ret = ask_channel_creation(ua_sess, ua_chan, consumer, socket, registry, |
268 | trace_archive_id); | |
2898de39 | 269 | pthread_mutex_unlock(socket->lock); |
37278a1e | 270 | if (ret < 0) { |
e9404c27 | 271 | ERR("ask_channel_creation consumer command failed"); |
37278a1e DG |
272 | goto error; |
273 | } | |
274 | ||
48842b30 DG |
275 | error: |
276 | return ret; | |
277 | } | |
278 | ||
279 | /* | |
ffe60014 DG |
280 | * Send a get channel command to consumer using the given channel key. The |
281 | * channel object is populated and the stream list. | |
282 | * | |
283 | * Return 0 on success else a negative value. | |
48842b30 | 284 | */ |
ffe60014 DG |
285 | int ust_consumer_get_channel(struct consumer_socket *socket, |
286 | struct ust_app_channel *ua_chan) | |
48842b30 | 287 | { |
ffe60014 | 288 | int ret; |
37278a1e | 289 | struct lttcomm_consumer_msg msg; |
48842b30 | 290 | |
ffe60014 DG |
291 | assert(ua_chan); |
292 | assert(socket); | |
48842b30 | 293 | |
53efb85a | 294 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
295 | msg.cmd_type = LTTNG_CONSUMER_GET_CHANNEL; |
296 | msg.u.get_channel.key = ua_chan->key; | |
37278a1e | 297 | |
ffe60014 | 298 | pthread_mutex_lock(socket->lock); |
840cb59c | 299 | health_code_update(); |
ca03de58 | 300 | |
ffe60014 DG |
301 | /* Send command and wait for OK reply. */ |
302 | ret = consumer_send_msg(socket, &msg); | |
37278a1e DG |
303 | if (ret < 0) { |
304 | goto error; | |
305 | } | |
306 | ||
ffe60014 | 307 | /* First, get the channel from consumer. */ |
9363801e | 308 | ret = ustctl_recv_channel_from_consumer(*socket->fd_ptr, &ua_chan->obj); |
37278a1e | 309 | if (ret < 0) { |
ffe60014 DG |
310 | if (ret != -EPIPE) { |
311 | ERR("Error recv channel from consumer %d with ret %d", | |
9363801e | 312 | *socket->fd_ptr, ret); |
ffe60014 DG |
313 | } else { |
314 | DBG3("UST app recv channel from consumer. Consumer is dead."); | |
315 | } | |
37278a1e DG |
316 | goto error; |
317 | } | |
00e2e675 | 318 | |
ffe60014 DG |
319 | /* Next, get all streams. */ |
320 | while (1) { | |
321 | struct ust_app_stream *stream; | |
ca03de58 | 322 | |
ffe60014 DG |
323 | /* Create UST stream */ |
324 | stream = ust_app_alloc_stream(); | |
325 | if (stream == NULL) { | |
326 | ret = -ENOMEM; | |
48842b30 DG |
327 | goto error; |
328 | } | |
329 | ||
ffe60014 | 330 | /* Stream object is populated by this call if successful. */ |
9363801e | 331 | ret = ustctl_recv_stream_from_consumer(*socket->fd_ptr, &stream->obj); |
37278a1e | 332 | if (ret < 0) { |
ffe60014 DG |
333 | free(stream); |
334 | if (ret == -LTTNG_UST_ERR_NOENT) { | |
335 | DBG3("UST app consumer has no more stream available"); | |
ffe60014 DG |
336 | break; |
337 | } | |
338 | if (ret != -EPIPE) { | |
339 | ERR("Recv stream from consumer %d with ret %d", | |
9363801e | 340 | *socket->fd_ptr, ret); |
ffe60014 DG |
341 | } else { |
342 | DBG3("UST app recv stream from consumer. Consumer is dead."); | |
00e2e675 | 343 | } |
48842b30 DG |
344 | goto error; |
345 | } | |
37278a1e | 346 | |
ffe60014 DG |
347 | /* Order is important this is why a list is used. */ |
348 | cds_list_add_tail(&stream->list, &ua_chan->streams.head); | |
349 | ua_chan->streams.count++; | |
37278a1e | 350 | |
5368d366 | 351 | DBG2("UST app stream %d received successfully", ua_chan->streams.count); |
ffe60014 DG |
352 | } |
353 | ||
354 | /* This MUST match or else we have a synchronization problem. */ | |
355 | assert(ua_chan->expected_stream_count == ua_chan->streams.count); | |
ca03de58 | 356 | |
ffe60014 DG |
357 | /* Wait for confirmation that we can proceed with the streams. */ |
358 | ret = consumer_recv_status_reply(socket); | |
37278a1e DG |
359 | if (ret < 0) { |
360 | goto error; | |
361 | } | |
362 | ||
363 | error: | |
ffe60014 DG |
364 | health_code_update(); |
365 | pthread_mutex_unlock(socket->lock); | |
37278a1e DG |
366 | return ret; |
367 | } | |
368 | ||
369 | /* | |
ffe60014 DG |
370 | * Send a destroy channel command to consumer using the given channel key. |
371 | * | |
372 | * Note that this command MUST be used prior to a successful | |
373 | * LTTNG_CONSUMER_GET_CHANNEL because once this command is done successfully, | |
374 | * the streams are dispatched to the consumer threads and MUST be teardown | |
375 | * through the hang up process. | |
376 | * | |
377 | * Return 0 on success else a negative value. | |
37278a1e | 378 | */ |
ffe60014 DG |
379 | int ust_consumer_destroy_channel(struct consumer_socket *socket, |
380 | struct ust_app_channel *ua_chan) | |
37278a1e | 381 | { |
ffe60014 DG |
382 | int ret; |
383 | struct lttcomm_consumer_msg msg; | |
a4b92340 | 384 | |
ffe60014 DG |
385 | assert(ua_chan); |
386 | assert(socket); | |
37278a1e | 387 | |
53efb85a | 388 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
389 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
390 | msg.u.destroy_channel.key = ua_chan->key; | |
173af62f | 391 | |
ffe60014 DG |
392 | pthread_mutex_lock(socket->lock); |
393 | health_code_update(); | |
37278a1e | 394 | |
ffe60014 | 395 | ret = consumer_send_msg(socket, &msg); |
37278a1e DG |
396 | if (ret < 0) { |
397 | goto error; | |
48842b30 DG |
398 | } |
399 | ||
ffe60014 DG |
400 | error: |
401 | health_code_update(); | |
402 | pthread_mutex_unlock(socket->lock); | |
403 | return ret; | |
404 | } | |
aeb96892 | 405 | |
ffe60014 DG |
406 | /* |
407 | * Send a given stream to UST tracer. | |
408 | * | |
409 | * On success return 0 else a negative value. | |
410 | */ | |
411 | int ust_consumer_send_stream_to_ust(struct ust_app *app, | |
412 | struct ust_app_channel *channel, struct ust_app_stream *stream) | |
413 | { | |
414 | int ret; | |
415 | ||
416 | assert(app); | |
417 | assert(stream); | |
418 | assert(channel); | |
419 | ||
420 | DBG2("UST consumer send stream to app %d", app->sock); | |
421 | ||
422 | /* Relay stream to application. */ | |
fb45065e | 423 | pthread_mutex_lock(&app->sock_lock); |
ffe60014 | 424 | ret = ustctl_send_stream_to_ust(app->sock, channel->obj, stream->obj); |
fb45065e | 425 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 DG |
426 | if (ret < 0) { |
427 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
8cf93def DG |
428 | ERR("ustctl send stream handle %d to app pid: %d with ret %d", |
429 | stream->obj->handle, app->pid, ret); | |
ffe60014 DG |
430 | } else { |
431 | DBG3("UST app send stream to ust failed. Application is dead."); | |
48842b30 | 432 | } |
ffe60014 | 433 | goto error; |
48842b30 | 434 | } |
d0b96690 | 435 | channel->handle = channel->obj->handle; |
48842b30 | 436 | |
ffe60014 DG |
437 | error: |
438 | return ret; | |
439 | } | |
440 | ||
441 | /* | |
442 | * Send channel previously received from the consumer to the UST tracer. | |
443 | * | |
444 | * On success return 0 else a negative value. | |
445 | */ | |
446 | int ust_consumer_send_channel_to_ust(struct ust_app *app, | |
447 | struct ust_app_session *ua_sess, struct ust_app_channel *channel) | |
448 | { | |
449 | int ret; | |
450 | ||
451 | assert(app); | |
452 | assert(ua_sess); | |
453 | assert(channel); | |
454 | assert(channel->obj); | |
455 | ||
7972aab2 DG |
456 | DBG2("UST app send channel to sock %d pid %d (name: %s, key: %" PRIu64 ")", |
457 | app->sock, app->pid, channel->name, channel->tracing_channel_id); | |
48842b30 | 458 | |
ffe60014 | 459 | /* Send stream to application. */ |
fb45065e | 460 | pthread_mutex_lock(&app->sock_lock); |
ffe60014 | 461 | ret = ustctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj); |
fb45065e | 462 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 DG |
463 | if (ret < 0) { |
464 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
465 | ERR("Error ustctl send channel %s to app pid: %d with ret %d", | |
466 | channel->name, app->pid, ret); | |
467 | } else { | |
468 | DBG3("UST app send channel to ust failed. Application is dead."); | |
469 | } | |
470 | goto error; | |
471 | } | |
48842b30 DG |
472 | |
473 | error: | |
474 | return ret; | |
475 | } | |
331744e3 JD |
476 | |
477 | /* | |
478 | * Handle the metadata requests from the UST consumer | |
479 | * | |
480 | * Return 0 on success else a negative value. | |
481 | */ | |
482 | int ust_consumer_metadata_request(struct consumer_socket *socket) | |
483 | { | |
484 | int ret; | |
485 | ssize_t ret_push; | |
486 | struct lttcomm_metadata_request_msg request; | |
487 | struct buffer_reg_uid *reg_uid; | |
488 | struct ust_registry_session *ust_reg; | |
489 | struct lttcomm_consumer_msg msg; | |
490 | ||
491 | assert(socket); | |
492 | ||
493 | rcu_read_lock(); | |
331744e3 JD |
494 | health_code_update(); |
495 | ||
496 | /* Wait for a metadata request */ | |
dc2bbdae | 497 | pthread_mutex_lock(socket->lock); |
52898cb1 | 498 | ret = consumer_socket_recv(socket, &request, sizeof(request)); |
dc2bbdae | 499 | pthread_mutex_unlock(socket->lock); |
52898cb1 | 500 | if (ret < 0) { |
331744e3 JD |
501 | goto end; |
502 | } | |
503 | ||
1950109e | 504 | DBG("Metadata request received for session %" PRIu64 ", key %" PRIu64, |
331744e3 JD |
505 | request.session_id, request.key); |
506 | ||
507 | reg_uid = buffer_reg_uid_find(request.session_id, | |
508 | request.bits_per_long, request.uid); | |
509 | if (reg_uid) { | |
510 | ust_reg = reg_uid->registry->reg.ust; | |
511 | } else { | |
512 | struct buffer_reg_pid *reg_pid = | |
1950109e | 513 | buffer_reg_pid_find(request.session_id_per_pid); |
331744e3 | 514 | if (!reg_pid) { |
1950109e JD |
515 | DBG("PID registry not found for session id %" PRIu64, |
516 | request.session_id_per_pid); | |
331744e3 | 517 | |
53efb85a | 518 | memset(&msg, 0, sizeof(msg)); |
331744e3 | 519 | msg.cmd_type = LTTNG_ERR_UND; |
cb7d882c | 520 | pthread_mutex_lock(socket->lock); |
331744e3 | 521 | (void) consumer_send_msg(socket, &msg); |
cb7d882c | 522 | pthread_mutex_unlock(socket->lock); |
331744e3 JD |
523 | /* |
524 | * This is possible since the session might have been destroyed | |
525 | * during a consumer metadata request. So here, return gracefully | |
526 | * because the destroy session will push the remaining metadata to | |
527 | * the consumer. | |
528 | */ | |
529 | ret = 0; | |
530 | goto end; | |
531 | } | |
532 | ust_reg = reg_pid->registry->reg.ust; | |
533 | } | |
534 | assert(ust_reg); | |
535 | ||
dc2bbdae | 536 | pthread_mutex_lock(&ust_reg->lock); |
331744e3 | 537 | ret_push = ust_app_push_metadata(ust_reg, socket, 1); |
dc2bbdae | 538 | pthread_mutex_unlock(&ust_reg->lock); |
2c57e06d MD |
539 | if (ret_push == -EPIPE) { |
540 | DBG("Application or relay closed while pushing metadata"); | |
541 | } else if (ret_push < 0) { | |
331744e3 JD |
542 | ERR("Pushing metadata"); |
543 | ret = -1; | |
544 | goto end; | |
2c57e06d MD |
545 | } else { |
546 | DBG("UST Consumer metadata pushed successfully"); | |
331744e3 | 547 | } |
331744e3 JD |
548 | ret = 0; |
549 | ||
550 | end: | |
331744e3 JD |
551 | rcu_read_unlock(); |
552 | return ret; | |
553 | } |