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