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 | |
ffe60014 DG |
56 | /* Allocate our self the string to make sure we never exceed PATH_MAX. */ |
57 | pathname = zmalloc(PATH_MAX); | |
58 | if (!pathname) { | |
48842b30 DG |
59 | goto error; |
60 | } | |
00e2e675 | 61 | |
ffe60014 DG |
62 | /* Get correct path name destination */ |
63 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
64 | /* Set application path to the destination path */ | |
366a9222 JD |
65 | ret = snprintf(pathname, PATH_MAX, "%s%s%s%s", |
66 | consumer->dst.session_root_path, | |
67 | consumer->chunk_path, | |
68 | consumer->subdir, ua_sess->path); | |
ffe60014 DG |
69 | if (ret < 0) { |
70 | PERROR("snprintf channel path"); | |
71 | goto error; | |
72 | } | |
ca03de58 | 73 | |
ffe60014 | 74 | /* Create directory. Ignore if exist. */ |
7972aab2 DG |
75 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, |
76 | ua_sess->euid, ua_sess->egid); | |
ffe60014 | 77 | if (ret < 0) { |
df5b86c8 | 78 | if (errno != EEXIST) { |
ffe60014 DG |
79 | ERR("Trace directory creation error"); |
80 | goto error; | |
81 | } | |
82 | } | |
83 | } else { | |
dec56f6c | 84 | ret = snprintf(pathname, PATH_MAX, "%s%s", consumer->subdir, |
ffe60014 DG |
85 | ua_sess->path); |
86 | if (ret < 0) { | |
87 | PERROR("snprintf channel path"); | |
88 | goto error; | |
89 | } | |
48842b30 DG |
90 | } |
91 | ||
ffe60014 | 92 | return pathname; |
ca03de58 | 93 | |
37278a1e | 94 | error: |
ffe60014 DG |
95 | free(pathname); |
96 | return NULL; | |
37278a1e DG |
97 | } |
98 | ||
99 | /* | |
e9404c27 | 100 | * Send a single channel to the consumer using command ASK_CHANNEL_CREATION. |
ffe60014 | 101 | * |
7972aab2 | 102 | * Consumer socket lock MUST be acquired before calling this. |
37278a1e | 103 | */ |
ffe60014 DG |
104 | static int ask_channel_creation(struct ust_app_session *ua_sess, |
105 | struct ust_app_channel *ua_chan, struct consumer_output *consumer, | |
7972aab2 | 106 | struct consumer_socket *socket, struct ust_registry_session *registry) |
37278a1e | 107 | { |
0c759fc9 | 108 | int ret, output; |
7972aab2 DG |
109 | uint32_t chan_id; |
110 | uint64_t key, chan_reg_key; | |
ffe60014 | 111 | char *pathname = NULL; |
37278a1e | 112 | struct lttcomm_consumer_msg msg; |
7972aab2 | 113 | struct ust_registry_channel *chan_reg; |
d7ba1388 | 114 | char shm_path[PATH_MAX] = ""; |
3d071855 | 115 | char root_shm_path[PATH_MAX] = ""; |
37278a1e | 116 | |
ffe60014 DG |
117 | assert(ua_sess); |
118 | assert(ua_chan); | |
119 | assert(socket); | |
37278a1e | 120 | assert(consumer); |
7972aab2 | 121 | assert(registry); |
ffe60014 DG |
122 | |
123 | DBG2("Asking UST consumer for channel"); | |
124 | ||
125 | /* Get and create full trace path of session. */ | |
10a50311 JD |
126 | if (ua_sess->output_traces) { |
127 | pathname = setup_trace_path(consumer, ua_sess); | |
128 | if (!pathname) { | |
129 | ret = -1; | |
130 | goto error; | |
131 | } | |
ffe60014 DG |
132 | } |
133 | ||
7972aab2 DG |
134 | /* Depending on the buffer type, a different channel key is used. */ |
135 | if (ua_sess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
136 | chan_reg_key = ua_chan->tracing_channel_id; | |
137 | } else { | |
138 | chan_reg_key = ua_chan->key; | |
139 | } | |
140 | ||
141 | if (ua_chan->attr.type == LTTNG_UST_CHAN_METADATA) { | |
142 | chan_id = -1U; | |
d7ba1388 MD |
143 | /* |
144 | * Metadata channels shm_path (buffers) are handled within | |
145 | * session daemon. Consumer daemon should not try to create | |
146 | * those buffer files. | |
147 | */ | |
7972aab2 DG |
148 | } else { |
149 | chan_reg = ust_registry_channel_find(registry, chan_reg_key); | |
150 | assert(chan_reg); | |
151 | chan_id = chan_reg->chan_id; | |
d7ba1388 MD |
152 | if (ua_sess->shm_path[0]) { |
153 | strncpy(shm_path, ua_sess->shm_path, sizeof(shm_path)); | |
154 | shm_path[sizeof(shm_path) - 1] = '\0'; | |
155 | strncat(shm_path, "/", | |
156 | sizeof(shm_path) - strlen(shm_path) - 1); | |
157 | strncat(shm_path, ua_chan->name, | |
158 | sizeof(shm_path) - strlen(shm_path) - 1); | |
159 | strncat(shm_path, "_", | |
160 | sizeof(shm_path) - strlen(shm_path) - 1); | |
161 | } | |
3d071855 MD |
162 | strncpy(root_shm_path, ua_sess->root_shm_path, sizeof(root_shm_path)); |
163 | root_shm_path[sizeof(root_shm_path) - 1] = '\0'; | |
7972aab2 DG |
164 | } |
165 | ||
0c759fc9 DG |
166 | switch (ua_chan->attr.output) { |
167 | case LTTNG_UST_MMAP: | |
168 | default: | |
169 | output = LTTNG_EVENT_MMAP; | |
170 | break; | |
171 | } | |
172 | ||
ffe60014 DG |
173 | consumer_init_ask_channel_comm_msg(&msg, |
174 | ua_chan->attr.subbuf_size, | |
175 | ua_chan->attr.num_subbuf, | |
176 | ua_chan->attr.overwrite, | |
177 | ua_chan->attr.switch_timer_interval, | |
178 | ua_chan->attr.read_timer_interval, | |
ecc48a90 | 179 | ua_sess->live_timer_interval, |
e9404c27 | 180 | ua_chan->monitor_timer_interval, |
0c759fc9 | 181 | output, |
ffe60014 | 182 | (int) ua_chan->attr.type, |
7972aab2 | 183 | ua_sess->tracing_id, |
ca22feea | 184 | pathname, |
ffe60014 | 185 | ua_chan->name, |
7972aab2 DG |
186 | ua_sess->euid, |
187 | ua_sess->egid, | |
ffe60014 DG |
188 | consumer->net_seq_index, |
189 | ua_chan->key, | |
7972aab2 | 190 | registry->uuid, |
1624d5b7 JD |
191 | chan_id, |
192 | ua_chan->tracefile_size, | |
2bba9e53 | 193 | ua_chan->tracefile_count, |
1950109e | 194 | ua_sess->id, |
567eb353 | 195 | ua_sess->output_traces, |
d7ba1388 | 196 | ua_sess->uid, |
491d1539 | 197 | ua_chan->attr.blocking_timeout, |
3d071855 | 198 | root_shm_path, shm_path); |
37278a1e | 199 | |
840cb59c | 200 | health_code_update(); |
ca03de58 | 201 | |
52898cb1 | 202 | ret = consumer_socket_send(socket, &msg, sizeof(msg)); |
37278a1e DG |
203 | if (ret < 0) { |
204 | goto error; | |
205 | } | |
206 | ||
ffe60014 DG |
207 | ret = consumer_recv_status_channel(socket, &key, |
208 | &ua_chan->expected_stream_count); | |
209 | if (ret < 0) { | |
210 | goto error; | |
211 | } | |
212 | /* Communication protocol error. */ | |
213 | assert(key == ua_chan->key); | |
214 | /* We need at least one where 1 stream for 1 cpu. */ | |
10a50311 JD |
215 | if (ua_sess->output_traces) { |
216 | assert(ua_chan->expected_stream_count > 0); | |
217 | } | |
ffe60014 | 218 | |
d88aee68 | 219 | DBG2("UST ask channel %" PRIu64 " successfully done with %u stream(s)", key, |
ffe60014 | 220 | ua_chan->expected_stream_count); |
ca03de58 | 221 | |
37278a1e | 222 | error: |
ffe60014 DG |
223 | free(pathname); |
224 | health_code_update(); | |
37278a1e DG |
225 | return ret; |
226 | } | |
227 | ||
228 | /* | |
ffe60014 DG |
229 | * Ask consumer to create a channel for a given session. |
230 | * | |
e9404c27 JG |
231 | * Session list and rcu read side locks must be held by the caller. |
232 | * | |
ffe60014 | 233 | * Returns 0 on success else a negative value. |
37278a1e | 234 | */ |
ffe60014 DG |
235 | int ust_consumer_ask_channel(struct ust_app_session *ua_sess, |
236 | struct ust_app_channel *ua_chan, struct consumer_output *consumer, | |
7972aab2 | 237 | struct consumer_socket *socket, struct ust_registry_session *registry) |
37278a1e DG |
238 | { |
239 | int ret; | |
e9404c27 | 240 | struct ltt_session *session; |
37278a1e | 241 | |
ffe60014 DG |
242 | assert(ua_sess); |
243 | assert(ua_chan); | |
244 | assert(consumer); | |
245 | assert(socket); | |
7972aab2 | 246 | assert(registry); |
f50f23d9 | 247 | |
d9078d0c DG |
248 | if (!consumer->enabled) { |
249 | ret = -LTTNG_ERR_NO_CONSUMER; | |
250 | DBG3("Consumer is disabled"); | |
251 | goto error; | |
252 | } | |
253 | ||
e9404c27 JG |
254 | session = session_find_by_id(ua_sess->tracing_id); |
255 | assert(session); | |
256 | ||
ffe60014 | 257 | pthread_mutex_lock(socket->lock); |
7972aab2 | 258 | ret = ask_channel_creation(ua_sess, ua_chan, consumer, socket, registry); |
2898de39 | 259 | pthread_mutex_unlock(socket->lock); |
37278a1e | 260 | if (ret < 0) { |
e9404c27 | 261 | ERR("ask_channel_creation consumer command failed"); |
37278a1e DG |
262 | goto error; |
263 | } | |
264 | ||
48842b30 DG |
265 | error: |
266 | return ret; | |
267 | } | |
268 | ||
269 | /* | |
ffe60014 DG |
270 | * Send a get channel command to consumer using the given channel key. The |
271 | * channel object is populated and the stream list. | |
272 | * | |
273 | * Return 0 on success else a negative value. | |
48842b30 | 274 | */ |
ffe60014 DG |
275 | int ust_consumer_get_channel(struct consumer_socket *socket, |
276 | struct ust_app_channel *ua_chan) | |
48842b30 | 277 | { |
ffe60014 | 278 | int ret; |
37278a1e | 279 | struct lttcomm_consumer_msg msg; |
48842b30 | 280 | |
ffe60014 DG |
281 | assert(ua_chan); |
282 | assert(socket); | |
48842b30 | 283 | |
53efb85a | 284 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
285 | msg.cmd_type = LTTNG_CONSUMER_GET_CHANNEL; |
286 | msg.u.get_channel.key = ua_chan->key; | |
37278a1e | 287 | |
ffe60014 | 288 | pthread_mutex_lock(socket->lock); |
840cb59c | 289 | health_code_update(); |
ca03de58 | 290 | |
ffe60014 DG |
291 | /* Send command and wait for OK reply. */ |
292 | ret = consumer_send_msg(socket, &msg); | |
37278a1e DG |
293 | if (ret < 0) { |
294 | goto error; | |
295 | } | |
296 | ||
ffe60014 | 297 | /* First, get the channel from consumer. */ |
9363801e | 298 | ret = ustctl_recv_channel_from_consumer(*socket->fd_ptr, &ua_chan->obj); |
37278a1e | 299 | if (ret < 0) { |
ffe60014 DG |
300 | if (ret != -EPIPE) { |
301 | ERR("Error recv channel from consumer %d with ret %d", | |
9363801e | 302 | *socket->fd_ptr, ret); |
ffe60014 DG |
303 | } else { |
304 | DBG3("UST app recv channel from consumer. Consumer is dead."); | |
305 | } | |
37278a1e DG |
306 | goto error; |
307 | } | |
00e2e675 | 308 | |
ffe60014 DG |
309 | /* Next, get all streams. */ |
310 | while (1) { | |
311 | struct ust_app_stream *stream; | |
ca03de58 | 312 | |
ffe60014 DG |
313 | /* Create UST stream */ |
314 | stream = ust_app_alloc_stream(); | |
315 | if (stream == NULL) { | |
316 | ret = -ENOMEM; | |
48842b30 DG |
317 | goto error; |
318 | } | |
319 | ||
ffe60014 | 320 | /* Stream object is populated by this call if successful. */ |
9363801e | 321 | ret = ustctl_recv_stream_from_consumer(*socket->fd_ptr, &stream->obj); |
37278a1e | 322 | if (ret < 0) { |
ffe60014 DG |
323 | free(stream); |
324 | if (ret == -LTTNG_UST_ERR_NOENT) { | |
325 | DBG3("UST app consumer has no more stream available"); | |
ffe60014 DG |
326 | break; |
327 | } | |
328 | if (ret != -EPIPE) { | |
329 | ERR("Recv stream from consumer %d with ret %d", | |
9363801e | 330 | *socket->fd_ptr, ret); |
ffe60014 DG |
331 | } else { |
332 | DBG3("UST app recv stream from consumer. Consumer is dead."); | |
00e2e675 | 333 | } |
48842b30 DG |
334 | goto error; |
335 | } | |
37278a1e | 336 | |
ffe60014 DG |
337 | /* Order is important this is why a list is used. */ |
338 | cds_list_add_tail(&stream->list, &ua_chan->streams.head); | |
339 | ua_chan->streams.count++; | |
37278a1e | 340 | |
5368d366 | 341 | DBG2("UST app stream %d received successfully", ua_chan->streams.count); |
ffe60014 DG |
342 | } |
343 | ||
344 | /* This MUST match or else we have a synchronization problem. */ | |
345 | assert(ua_chan->expected_stream_count == ua_chan->streams.count); | |
ca03de58 | 346 | |
ffe60014 DG |
347 | /* Wait for confirmation that we can proceed with the streams. */ |
348 | ret = consumer_recv_status_reply(socket); | |
37278a1e DG |
349 | if (ret < 0) { |
350 | goto error; | |
351 | } | |
352 | ||
353 | error: | |
ffe60014 DG |
354 | health_code_update(); |
355 | pthread_mutex_unlock(socket->lock); | |
37278a1e DG |
356 | return ret; |
357 | } | |
358 | ||
359 | /* | |
ffe60014 DG |
360 | * Send a destroy channel command to consumer using the given channel key. |
361 | * | |
362 | * Note that this command MUST be used prior to a successful | |
363 | * LTTNG_CONSUMER_GET_CHANNEL because once this command is done successfully, | |
364 | * the streams are dispatched to the consumer threads and MUST be teardown | |
365 | * through the hang up process. | |
366 | * | |
367 | * Return 0 on success else a negative value. | |
37278a1e | 368 | */ |
ffe60014 DG |
369 | int ust_consumer_destroy_channel(struct consumer_socket *socket, |
370 | struct ust_app_channel *ua_chan) | |
37278a1e | 371 | { |
ffe60014 DG |
372 | int ret; |
373 | struct lttcomm_consumer_msg msg; | |
a4b92340 | 374 | |
ffe60014 DG |
375 | assert(ua_chan); |
376 | assert(socket); | |
37278a1e | 377 | |
53efb85a | 378 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
379 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
380 | msg.u.destroy_channel.key = ua_chan->key; | |
173af62f | 381 | |
ffe60014 DG |
382 | pthread_mutex_lock(socket->lock); |
383 | health_code_update(); | |
37278a1e | 384 | |
ffe60014 | 385 | ret = consumer_send_msg(socket, &msg); |
37278a1e DG |
386 | if (ret < 0) { |
387 | goto error; | |
48842b30 DG |
388 | } |
389 | ||
ffe60014 DG |
390 | error: |
391 | health_code_update(); | |
392 | pthread_mutex_unlock(socket->lock); | |
393 | return ret; | |
394 | } | |
aeb96892 | 395 | |
ffe60014 DG |
396 | /* |
397 | * Send a given stream to UST tracer. | |
398 | * | |
399 | * On success return 0 else a negative value. | |
400 | */ | |
401 | int ust_consumer_send_stream_to_ust(struct ust_app *app, | |
402 | struct ust_app_channel *channel, struct ust_app_stream *stream) | |
403 | { | |
404 | int ret; | |
405 | ||
406 | assert(app); | |
407 | assert(stream); | |
408 | assert(channel); | |
409 | ||
410 | DBG2("UST consumer send stream to app %d", app->sock); | |
411 | ||
412 | /* Relay stream to application. */ | |
fb45065e | 413 | pthread_mutex_lock(&app->sock_lock); |
ffe60014 | 414 | ret = ustctl_send_stream_to_ust(app->sock, channel->obj, stream->obj); |
fb45065e | 415 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 DG |
416 | if (ret < 0) { |
417 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
8cf93def DG |
418 | ERR("ustctl send stream handle %d to app pid: %d with ret %d", |
419 | stream->obj->handle, app->pid, ret); | |
ffe60014 DG |
420 | } else { |
421 | DBG3("UST app send stream to ust failed. Application is dead."); | |
48842b30 | 422 | } |
ffe60014 | 423 | goto error; |
48842b30 | 424 | } |
d0b96690 | 425 | channel->handle = channel->obj->handle; |
48842b30 | 426 | |
ffe60014 DG |
427 | error: |
428 | return ret; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Send channel previously received from the consumer to the UST tracer. | |
433 | * | |
434 | * On success return 0 else a negative value. | |
435 | */ | |
436 | int ust_consumer_send_channel_to_ust(struct ust_app *app, | |
437 | struct ust_app_session *ua_sess, struct ust_app_channel *channel) | |
438 | { | |
439 | int ret; | |
440 | ||
441 | assert(app); | |
442 | assert(ua_sess); | |
443 | assert(channel); | |
444 | assert(channel->obj); | |
445 | ||
7972aab2 DG |
446 | DBG2("UST app send channel to sock %d pid %d (name: %s, key: %" PRIu64 ")", |
447 | app->sock, app->pid, channel->name, channel->tracing_channel_id); | |
48842b30 | 448 | |
ffe60014 | 449 | /* Send stream to application. */ |
fb45065e | 450 | pthread_mutex_lock(&app->sock_lock); |
ffe60014 | 451 | ret = ustctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj); |
fb45065e | 452 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 DG |
453 | if (ret < 0) { |
454 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
455 | ERR("Error ustctl send channel %s to app pid: %d with ret %d", | |
456 | channel->name, app->pid, ret); | |
457 | } else { | |
458 | DBG3("UST app send channel to ust failed. Application is dead."); | |
459 | } | |
460 | goto error; | |
461 | } | |
48842b30 DG |
462 | |
463 | error: | |
464 | return ret; | |
465 | } | |
331744e3 JD |
466 | |
467 | /* | |
468 | * Handle the metadata requests from the UST consumer | |
469 | * | |
470 | * Return 0 on success else a negative value. | |
471 | */ | |
472 | int ust_consumer_metadata_request(struct consumer_socket *socket) | |
473 | { | |
474 | int ret; | |
475 | ssize_t ret_push; | |
476 | struct lttcomm_metadata_request_msg request; | |
477 | struct buffer_reg_uid *reg_uid; | |
478 | struct ust_registry_session *ust_reg; | |
479 | struct lttcomm_consumer_msg msg; | |
480 | ||
481 | assert(socket); | |
482 | ||
483 | rcu_read_lock(); | |
331744e3 JD |
484 | health_code_update(); |
485 | ||
486 | /* Wait for a metadata request */ | |
dc2bbdae | 487 | pthread_mutex_lock(socket->lock); |
52898cb1 | 488 | ret = consumer_socket_recv(socket, &request, sizeof(request)); |
dc2bbdae | 489 | pthread_mutex_unlock(socket->lock); |
52898cb1 | 490 | if (ret < 0) { |
331744e3 JD |
491 | goto end; |
492 | } | |
493 | ||
1950109e | 494 | DBG("Metadata request received for session %" PRIu64 ", key %" PRIu64, |
331744e3 JD |
495 | request.session_id, request.key); |
496 | ||
497 | reg_uid = buffer_reg_uid_find(request.session_id, | |
498 | request.bits_per_long, request.uid); | |
499 | if (reg_uid) { | |
500 | ust_reg = reg_uid->registry->reg.ust; | |
501 | } else { | |
502 | struct buffer_reg_pid *reg_pid = | |
1950109e | 503 | buffer_reg_pid_find(request.session_id_per_pid); |
331744e3 | 504 | if (!reg_pid) { |
1950109e JD |
505 | DBG("PID registry not found for session id %" PRIu64, |
506 | request.session_id_per_pid); | |
331744e3 | 507 | |
53efb85a | 508 | memset(&msg, 0, sizeof(msg)); |
331744e3 JD |
509 | msg.cmd_type = LTTNG_ERR_UND; |
510 | (void) consumer_send_msg(socket, &msg); | |
511 | /* | |
512 | * This is possible since the session might have been destroyed | |
513 | * during a consumer metadata request. So here, return gracefully | |
514 | * because the destroy session will push the remaining metadata to | |
515 | * the consumer. | |
516 | */ | |
517 | ret = 0; | |
518 | goto end; | |
519 | } | |
520 | ust_reg = reg_pid->registry->reg.ust; | |
521 | } | |
522 | assert(ust_reg); | |
523 | ||
dc2bbdae | 524 | pthread_mutex_lock(&ust_reg->lock); |
331744e3 | 525 | ret_push = ust_app_push_metadata(ust_reg, socket, 1); |
dc2bbdae | 526 | pthread_mutex_unlock(&ust_reg->lock); |
2c57e06d MD |
527 | if (ret_push == -EPIPE) { |
528 | DBG("Application or relay closed while pushing metadata"); | |
529 | } else if (ret_push < 0) { | |
331744e3 JD |
530 | ERR("Pushing metadata"); |
531 | ret = -1; | |
532 | goto end; | |
2c57e06d MD |
533 | } else { |
534 | DBG("UST Consumer metadata pushed successfully"); | |
331744e3 | 535 | } |
331744e3 JD |
536 | ret = 0; |
537 | ||
538 | end: | |
331744e3 JD |
539 | rcu_read_unlock(); |
540 | return ret; | |
541 | } |