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" |
c57c2c74 | 33 | #include "lttng-ust-error.h" |
331744e3 JD |
34 | #include "buffer-registry.h" |
35 | #include "session.h" | |
e9404c27 | 36 | #include "lttng-sessiond.h" |
48842b30 DG |
37 | |
38 | /* | |
ffe60014 DG |
39 | * Return allocated full pathname of the session using the consumer trace path |
40 | * and subdir if available. On a successful allocation, the directory of the | |
41 | * trace is created with the session credentials. | |
42 | * | |
43 | * The caller can safely free(3) the returned value. On error, NULL is | |
44 | * returned. | |
48842b30 | 45 | */ |
ffe60014 DG |
46 | static char *setup_trace_path(struct consumer_output *consumer, |
47 | struct ust_app_session *ua_sess) | |
48842b30 | 48 | { |
ffe60014 DG |
49 | int ret; |
50 | char *pathname; | |
37278a1e | 51 | |
ffe60014 DG |
52 | assert(consumer); |
53 | assert(ua_sess); | |
00e2e675 | 54 | |
840cb59c | 55 | health_code_update(); |
ca03de58 | 56 | |
ffe60014 DG |
57 | /* Allocate our self the string to make sure we never exceed PATH_MAX. */ |
58 | pathname = zmalloc(PATH_MAX); | |
59 | if (!pathname) { | |
48842b30 DG |
60 | goto error; |
61 | } | |
00e2e675 | 62 | |
ffe60014 DG |
63 | /* Get correct path name destination */ |
64 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
65 | /* Set application path to the destination path */ | |
dec56f6c | 66 | ret = snprintf(pathname, PATH_MAX, "%s%s%s", |
ffe60014 DG |
67 | consumer->dst.trace_path, consumer->subdir, ua_sess->path); |
68 | if (ret < 0) { | |
69 | PERROR("snprintf channel path"); | |
70 | goto error; | |
71 | } | |
ca03de58 | 72 | |
ffe60014 | 73 | /* Create directory. Ignore if exist. */ |
7972aab2 DG |
74 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, |
75 | ua_sess->euid, ua_sess->egid); | |
ffe60014 | 76 | if (ret < 0) { |
df5b86c8 | 77 | if (errno != EEXIST) { |
ffe60014 DG |
78 | ERR("Trace directory creation error"); |
79 | goto error; | |
80 | } | |
81 | } | |
82 | } else { | |
dec56f6c | 83 | ret = snprintf(pathname, PATH_MAX, "%s%s", consumer->subdir, |
ffe60014 DG |
84 | ua_sess->path); |
85 | if (ret < 0) { | |
86 | PERROR("snprintf channel path"); | |
87 | goto error; | |
88 | } | |
48842b30 DG |
89 | } |
90 | ||
ffe60014 | 91 | return pathname; |
ca03de58 | 92 | |
37278a1e | 93 | error: |
ffe60014 DG |
94 | free(pathname); |
95 | return NULL; | |
37278a1e DG |
96 | } |
97 | ||
98 | /* | |
e9404c27 | 99 | * Send a single channel to the consumer using command ASK_CHANNEL_CREATION. |
ffe60014 | 100 | * |
7972aab2 | 101 | * Consumer socket lock MUST be acquired before calling this. |
37278a1e | 102 | */ |
ffe60014 DG |
103 | static int ask_channel_creation(struct ust_app_session *ua_sess, |
104 | struct ust_app_channel *ua_chan, struct consumer_output *consumer, | |
7972aab2 | 105 | struct consumer_socket *socket, struct ust_registry_session *registry) |
37278a1e | 106 | { |
0c759fc9 | 107 | int ret, output; |
7972aab2 DG |
108 | uint32_t chan_id; |
109 | uint64_t key, chan_reg_key; | |
ffe60014 | 110 | char *pathname = NULL; |
37278a1e | 111 | struct lttcomm_consumer_msg msg; |
7972aab2 | 112 | struct ust_registry_channel *chan_reg; |
d7ba1388 | 113 | char shm_path[PATH_MAX] = ""; |
3d071855 | 114 | char root_shm_path[PATH_MAX] = ""; |
37278a1e | 115 | |
ffe60014 DG |
116 | assert(ua_sess); |
117 | assert(ua_chan); | |
118 | assert(socket); | |
37278a1e | 119 | assert(consumer); |
7972aab2 | 120 | assert(registry); |
ffe60014 DG |
121 | |
122 | DBG2("Asking UST consumer for channel"); | |
123 | ||
124 | /* Get and create full trace path of session. */ | |
10a50311 JD |
125 | if (ua_sess->output_traces) { |
126 | pathname = setup_trace_path(consumer, ua_sess); | |
127 | if (!pathname) { | |
128 | ret = -1; | |
129 | goto error; | |
130 | } | |
ffe60014 DG |
131 | } |
132 | ||
7972aab2 DG |
133 | /* Depending on the buffer type, a different channel key is used. */ |
134 | if (ua_sess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
135 | chan_reg_key = ua_chan->tracing_channel_id; | |
136 | } else { | |
137 | chan_reg_key = ua_chan->key; | |
138 | } | |
139 | ||
140 | if (ua_chan->attr.type == LTTNG_UST_CHAN_METADATA) { | |
141 | chan_id = -1U; | |
d7ba1388 MD |
142 | /* |
143 | * Metadata channels shm_path (buffers) are handled within | |
144 | * session daemon. Consumer daemon should not try to create | |
145 | * those buffer files. | |
146 | */ | |
7972aab2 DG |
147 | } else { |
148 | chan_reg = ust_registry_channel_find(registry, chan_reg_key); | |
149 | assert(chan_reg); | |
150 | chan_id = chan_reg->chan_id; | |
d7ba1388 MD |
151 | if (ua_sess->shm_path[0]) { |
152 | strncpy(shm_path, ua_sess->shm_path, sizeof(shm_path)); | |
153 | shm_path[sizeof(shm_path) - 1] = '\0'; | |
154 | strncat(shm_path, "/", | |
155 | sizeof(shm_path) - strlen(shm_path) - 1); | |
156 | strncat(shm_path, ua_chan->name, | |
157 | sizeof(shm_path) - strlen(shm_path) - 1); | |
158 | strncat(shm_path, "_", | |
159 | sizeof(shm_path) - strlen(shm_path) - 1); | |
160 | } | |
3d071855 MD |
161 | strncpy(root_shm_path, ua_sess->root_shm_path, sizeof(root_shm_path)); |
162 | root_shm_path[sizeof(root_shm_path) - 1] = '\0'; | |
7972aab2 DG |
163 | } |
164 | ||
0c759fc9 DG |
165 | switch (ua_chan->attr.output) { |
166 | case LTTNG_UST_MMAP: | |
167 | default: | |
168 | output = LTTNG_EVENT_MMAP; | |
169 | break; | |
170 | } | |
171 | ||
ffe60014 DG |
172 | consumer_init_ask_channel_comm_msg(&msg, |
173 | ua_chan->attr.subbuf_size, | |
174 | ua_chan->attr.num_subbuf, | |
175 | ua_chan->attr.overwrite, | |
176 | ua_chan->attr.switch_timer_interval, | |
177 | ua_chan->attr.read_timer_interval, | |
ecc48a90 | 178 | ua_sess->live_timer_interval, |
e9404c27 | 179 | ua_chan->monitor_timer_interval, |
0c759fc9 | 180 | output, |
ffe60014 | 181 | (int) ua_chan->attr.type, |
7972aab2 | 182 | ua_sess->tracing_id, |
ca22feea | 183 | pathname, |
ffe60014 | 184 | ua_chan->name, |
7972aab2 DG |
185 | ua_sess->euid, |
186 | ua_sess->egid, | |
ffe60014 DG |
187 | consumer->net_seq_index, |
188 | ua_chan->key, | |
7972aab2 | 189 | registry->uuid, |
1624d5b7 JD |
190 | chan_id, |
191 | ua_chan->tracefile_size, | |
2bba9e53 | 192 | ua_chan->tracefile_count, |
1950109e | 193 | ua_sess->id, |
567eb353 | 194 | ua_sess->output_traces, |
d7ba1388 | 195 | ua_sess->uid, |
f515d318 | 196 | ua_chan->attr.blocking_timeout, |
3d071855 | 197 | root_shm_path, shm_path); |
37278a1e | 198 | |
840cb59c | 199 | health_code_update(); |
ca03de58 | 200 | |
52898cb1 | 201 | ret = consumer_socket_send(socket, &msg, sizeof(msg)); |
37278a1e DG |
202 | if (ret < 0) { |
203 | goto error; | |
204 | } | |
205 | ||
ffe60014 DG |
206 | ret = consumer_recv_status_channel(socket, &key, |
207 | &ua_chan->expected_stream_count); | |
208 | if (ret < 0) { | |
209 | goto error; | |
210 | } | |
211 | /* Communication protocol error. */ | |
212 | assert(key == ua_chan->key); | |
213 | /* We need at least one where 1 stream for 1 cpu. */ | |
10a50311 JD |
214 | if (ua_sess->output_traces) { |
215 | assert(ua_chan->expected_stream_count > 0); | |
216 | } | |
ffe60014 | 217 | |
d88aee68 | 218 | DBG2("UST ask channel %" PRIu64 " successfully done with %u stream(s)", key, |
ffe60014 | 219 | ua_chan->expected_stream_count); |
ca03de58 | 220 | |
37278a1e | 221 | error: |
ffe60014 DG |
222 | free(pathname); |
223 | health_code_update(); | |
37278a1e DG |
224 | return ret; |
225 | } | |
226 | ||
227 | /* | |
ffe60014 DG |
228 | * Ask consumer to create a channel for a given session. |
229 | * | |
e9404c27 JG |
230 | * Session list and rcu read side locks must be held by the caller. |
231 | * | |
ffe60014 | 232 | * Returns 0 on success else a negative value. |
37278a1e | 233 | */ |
ffe60014 DG |
234 | int ust_consumer_ask_channel(struct ust_app_session *ua_sess, |
235 | struct ust_app_channel *ua_chan, struct consumer_output *consumer, | |
7972aab2 | 236 | struct consumer_socket *socket, struct ust_registry_session *registry) |
37278a1e DG |
237 | { |
238 | int ret; | |
e9404c27 | 239 | struct ltt_session *session; |
37278a1e | 240 | |
ffe60014 DG |
241 | assert(ua_sess); |
242 | assert(ua_chan); | |
243 | assert(consumer); | |
244 | assert(socket); | |
7972aab2 | 245 | assert(registry); |
f50f23d9 | 246 | |
d9078d0c DG |
247 | if (!consumer->enabled) { |
248 | ret = -LTTNG_ERR_NO_CONSUMER; | |
249 | DBG3("Consumer is disabled"); | |
250 | goto error; | |
251 | } | |
252 | ||
e9404c27 JG |
253 | session = session_find_by_id(ua_sess->tracing_id); |
254 | assert(session); | |
255 | ||
ffe60014 | 256 | pthread_mutex_lock(socket->lock); |
7972aab2 | 257 | ret = ask_channel_creation(ua_sess, ua_chan, consumer, socket, registry); |
2898de39 | 258 | pthread_mutex_unlock(socket->lock); |
37278a1e | 259 | if (ret < 0) { |
e9404c27 | 260 | ERR("ask_channel_creation consumer command failed"); |
37278a1e DG |
261 | goto error; |
262 | } | |
263 | ||
48842b30 DG |
264 | error: |
265 | return ret; | |
266 | } | |
267 | ||
268 | /* | |
ffe60014 DG |
269 | * Send a get channel command to consumer using the given channel key. The |
270 | * channel object is populated and the stream list. | |
271 | * | |
272 | * Return 0 on success else a negative value. | |
48842b30 | 273 | */ |
ffe60014 DG |
274 | int ust_consumer_get_channel(struct consumer_socket *socket, |
275 | struct ust_app_channel *ua_chan) | |
48842b30 | 276 | { |
ffe60014 | 277 | int ret; |
37278a1e | 278 | struct lttcomm_consumer_msg msg; |
48842b30 | 279 | |
ffe60014 DG |
280 | assert(ua_chan); |
281 | assert(socket); | |
48842b30 | 282 | |
53efb85a | 283 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
284 | msg.cmd_type = LTTNG_CONSUMER_GET_CHANNEL; |
285 | msg.u.get_channel.key = ua_chan->key; | |
37278a1e | 286 | |
ffe60014 | 287 | pthread_mutex_lock(socket->lock); |
840cb59c | 288 | health_code_update(); |
ca03de58 | 289 | |
ffe60014 DG |
290 | /* Send command and wait for OK reply. */ |
291 | ret = consumer_send_msg(socket, &msg); | |
37278a1e DG |
292 | if (ret < 0) { |
293 | goto error; | |
294 | } | |
295 | ||
ffe60014 | 296 | /* First, get the channel from consumer. */ |
9363801e | 297 | ret = ustctl_recv_channel_from_consumer(*socket->fd_ptr, &ua_chan->obj); |
37278a1e | 298 | if (ret < 0) { |
ffe60014 DG |
299 | if (ret != -EPIPE) { |
300 | ERR("Error recv channel from consumer %d with ret %d", | |
9363801e | 301 | *socket->fd_ptr, ret); |
ffe60014 DG |
302 | } else { |
303 | DBG3("UST app recv channel from consumer. Consumer is dead."); | |
304 | } | |
37278a1e DG |
305 | goto error; |
306 | } | |
00e2e675 | 307 | |
ffe60014 DG |
308 | /* Next, get all streams. */ |
309 | while (1) { | |
310 | struct ust_app_stream *stream; | |
ca03de58 | 311 | |
ffe60014 DG |
312 | /* Create UST stream */ |
313 | stream = ust_app_alloc_stream(); | |
314 | if (stream == NULL) { | |
315 | ret = -ENOMEM; | |
48842b30 DG |
316 | goto error; |
317 | } | |
318 | ||
ffe60014 | 319 | /* Stream object is populated by this call if successful. */ |
9363801e | 320 | ret = ustctl_recv_stream_from_consumer(*socket->fd_ptr, &stream->obj); |
37278a1e | 321 | if (ret < 0) { |
ffe60014 DG |
322 | free(stream); |
323 | if (ret == -LTTNG_UST_ERR_NOENT) { | |
324 | DBG3("UST app consumer has no more stream available"); | |
ffe60014 DG |
325 | break; |
326 | } | |
327 | if (ret != -EPIPE) { | |
328 | ERR("Recv stream from consumer %d with ret %d", | |
9363801e | 329 | *socket->fd_ptr, ret); |
ffe60014 DG |
330 | } else { |
331 | DBG3("UST app recv stream from consumer. Consumer is dead."); | |
00e2e675 | 332 | } |
48842b30 DG |
333 | goto error; |
334 | } | |
37278a1e | 335 | |
ffe60014 DG |
336 | /* Order is important this is why a list is used. */ |
337 | cds_list_add_tail(&stream->list, &ua_chan->streams.head); | |
338 | ua_chan->streams.count++; | |
37278a1e | 339 | |
5368d366 | 340 | DBG2("UST app stream %d received successfully", ua_chan->streams.count); |
ffe60014 DG |
341 | } |
342 | ||
343 | /* This MUST match or else we have a synchronization problem. */ | |
344 | assert(ua_chan->expected_stream_count == ua_chan->streams.count); | |
ca03de58 | 345 | |
ffe60014 DG |
346 | /* Wait for confirmation that we can proceed with the streams. */ |
347 | ret = consumer_recv_status_reply(socket); | |
37278a1e DG |
348 | if (ret < 0) { |
349 | goto error; | |
350 | } | |
351 | ||
352 | error: | |
ffe60014 DG |
353 | health_code_update(); |
354 | pthread_mutex_unlock(socket->lock); | |
37278a1e DG |
355 | return ret; |
356 | } | |
357 | ||
358 | /* | |
ffe60014 DG |
359 | * Send a destroy channel command to consumer using the given channel key. |
360 | * | |
361 | * Note that this command MUST be used prior to a successful | |
362 | * LTTNG_CONSUMER_GET_CHANNEL because once this command is done successfully, | |
363 | * the streams are dispatched to the consumer threads and MUST be teardown | |
364 | * through the hang up process. | |
365 | * | |
366 | * Return 0 on success else a negative value. | |
37278a1e | 367 | */ |
ffe60014 DG |
368 | int ust_consumer_destroy_channel(struct consumer_socket *socket, |
369 | struct ust_app_channel *ua_chan) | |
37278a1e | 370 | { |
ffe60014 DG |
371 | int ret; |
372 | struct lttcomm_consumer_msg msg; | |
a4b92340 | 373 | |
ffe60014 DG |
374 | assert(ua_chan); |
375 | assert(socket); | |
37278a1e | 376 | |
53efb85a | 377 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
378 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
379 | msg.u.destroy_channel.key = ua_chan->key; | |
173af62f | 380 | |
ffe60014 DG |
381 | pthread_mutex_lock(socket->lock); |
382 | health_code_update(); | |
37278a1e | 383 | |
ffe60014 | 384 | ret = consumer_send_msg(socket, &msg); |
37278a1e DG |
385 | if (ret < 0) { |
386 | goto error; | |
48842b30 DG |
387 | } |
388 | ||
ffe60014 DG |
389 | error: |
390 | health_code_update(); | |
391 | pthread_mutex_unlock(socket->lock); | |
392 | return ret; | |
393 | } | |
aeb96892 | 394 | |
ffe60014 DG |
395 | /* |
396 | * Send a given stream to UST tracer. | |
397 | * | |
398 | * On success return 0 else a negative value. | |
399 | */ | |
400 | int ust_consumer_send_stream_to_ust(struct ust_app *app, | |
401 | struct ust_app_channel *channel, struct ust_app_stream *stream) | |
402 | { | |
403 | int ret; | |
404 | ||
405 | assert(app); | |
406 | assert(stream); | |
407 | assert(channel); | |
408 | ||
409 | DBG2("UST consumer send stream to app %d", app->sock); | |
410 | ||
411 | /* Relay stream to application. */ | |
fb45065e | 412 | pthread_mutex_lock(&app->sock_lock); |
ffe60014 | 413 | ret = ustctl_send_stream_to_ust(app->sock, channel->obj, stream->obj); |
fb45065e | 414 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 DG |
415 | if (ret < 0) { |
416 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
8cf93def DG |
417 | ERR("ustctl send stream handle %d to app pid: %d with ret %d", |
418 | stream->obj->handle, app->pid, ret); | |
ffe60014 DG |
419 | } else { |
420 | DBG3("UST app send stream to ust failed. Application is dead."); | |
48842b30 | 421 | } |
ffe60014 | 422 | goto error; |
48842b30 | 423 | } |
d0b96690 | 424 | channel->handle = channel->obj->handle; |
48842b30 | 425 | |
ffe60014 DG |
426 | error: |
427 | return ret; | |
428 | } | |
429 | ||
430 | /* | |
431 | * Send channel previously received from the consumer to the UST tracer. | |
432 | * | |
433 | * On success return 0 else a negative value. | |
434 | */ | |
435 | int ust_consumer_send_channel_to_ust(struct ust_app *app, | |
436 | struct ust_app_session *ua_sess, struct ust_app_channel *channel) | |
437 | { | |
438 | int ret; | |
439 | ||
440 | assert(app); | |
441 | assert(ua_sess); | |
442 | assert(channel); | |
443 | assert(channel->obj); | |
444 | ||
7972aab2 DG |
445 | DBG2("UST app send channel to sock %d pid %d (name: %s, key: %" PRIu64 ")", |
446 | app->sock, app->pid, channel->name, channel->tracing_channel_id); | |
48842b30 | 447 | |
ffe60014 | 448 | /* Send stream to application. */ |
fb45065e | 449 | pthread_mutex_lock(&app->sock_lock); |
ffe60014 | 450 | ret = ustctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj); |
fb45065e | 451 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 DG |
452 | if (ret < 0) { |
453 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
454 | ERR("Error ustctl send channel %s to app pid: %d with ret %d", | |
455 | channel->name, app->pid, ret); | |
456 | } else { | |
457 | DBG3("UST app send channel to ust failed. Application is dead."); | |
458 | } | |
459 | goto error; | |
460 | } | |
48842b30 DG |
461 | |
462 | error: | |
463 | return ret; | |
464 | } | |
331744e3 JD |
465 | |
466 | /* | |
467 | * Handle the metadata requests from the UST consumer | |
468 | * | |
469 | * Return 0 on success else a negative value. | |
470 | */ | |
471 | int ust_consumer_metadata_request(struct consumer_socket *socket) | |
472 | { | |
473 | int ret; | |
474 | ssize_t ret_push; | |
475 | struct lttcomm_metadata_request_msg request; | |
476 | struct buffer_reg_uid *reg_uid; | |
477 | struct ust_registry_session *ust_reg; | |
478 | struct lttcomm_consumer_msg msg; | |
479 | ||
480 | assert(socket); | |
481 | ||
482 | rcu_read_lock(); | |
331744e3 JD |
483 | health_code_update(); |
484 | ||
485 | /* Wait for a metadata request */ | |
dc2bbdae | 486 | pthread_mutex_lock(socket->lock); |
52898cb1 | 487 | ret = consumer_socket_recv(socket, &request, sizeof(request)); |
dc2bbdae | 488 | pthread_mutex_unlock(socket->lock); |
52898cb1 | 489 | if (ret < 0) { |
331744e3 JD |
490 | goto end; |
491 | } | |
492 | ||
1950109e | 493 | DBG("Metadata request received for session %" PRIu64 ", key %" PRIu64, |
331744e3 JD |
494 | request.session_id, request.key); |
495 | ||
496 | reg_uid = buffer_reg_uid_find(request.session_id, | |
497 | request.bits_per_long, request.uid); | |
498 | if (reg_uid) { | |
499 | ust_reg = reg_uid->registry->reg.ust; | |
500 | } else { | |
501 | struct buffer_reg_pid *reg_pid = | |
1950109e | 502 | buffer_reg_pid_find(request.session_id_per_pid); |
331744e3 | 503 | if (!reg_pid) { |
1950109e JD |
504 | DBG("PID registry not found for session id %" PRIu64, |
505 | request.session_id_per_pid); | |
331744e3 | 506 | |
53efb85a | 507 | memset(&msg, 0, sizeof(msg)); |
331744e3 | 508 | msg.cmd_type = LTTNG_ERR_UND; |
1b0afea2 | 509 | pthread_mutex_lock(socket->lock); |
331744e3 | 510 | (void) consumer_send_msg(socket, &msg); |
1b0afea2 | 511 | pthread_mutex_unlock(socket->lock); |
331744e3 JD |
512 | /* |
513 | * This is possible since the session might have been destroyed | |
514 | * during a consumer metadata request. So here, return gracefully | |
515 | * because the destroy session will push the remaining metadata to | |
516 | * the consumer. | |
517 | */ | |
518 | ret = 0; | |
519 | goto end; | |
520 | } | |
521 | ust_reg = reg_pid->registry->reg.ust; | |
522 | } | |
523 | assert(ust_reg); | |
524 | ||
dc2bbdae | 525 | pthread_mutex_lock(&ust_reg->lock); |
331744e3 | 526 | ret_push = ust_app_push_metadata(ust_reg, socket, 1); |
dc2bbdae | 527 | pthread_mutex_unlock(&ust_reg->lock); |
2c57e06d MD |
528 | if (ret_push == -EPIPE) { |
529 | DBG("Application or relay closed while pushing metadata"); | |
530 | } else if (ret_push < 0) { | |
331744e3 JD |
531 | ERR("Pushing metadata"); |
532 | ret = -1; | |
533 | goto end; | |
2c57e06d MD |
534 | } else { |
535 | DBG("UST Consumer metadata pushed successfully"); | |
331744e3 | 536 | } |
331744e3 JD |
537 | ret = 0; |
538 | ||
539 | end: | |
331744e3 JD |
540 | rcu_read_unlock(); |
541 | return ret; | |
542 | } |