Commit | Line | Data |
---|---|---|
48842b30 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
48842b30 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
48842b30 | 5 | * |
48842b30 DG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
28ab034a JG |
9 | #include "buffer-registry.hpp" |
10 | #include "consumer.hpp" | |
11 | #include "health-sessiond.hpp" | |
12 | #include "lttng-sessiond.hpp" | |
13 | #include "lttng-ust-error.hpp" | |
14 | #include "session.hpp" | |
15 | #include "ust-consumer.hpp" | |
48842b30 | 16 | |
c9e313bc | 17 | #include <common/common.hpp> |
28ab034a | 18 | #include <common/compat/errno.hpp> |
c9e313bc SM |
19 | #include <common/consumer/consumer.hpp> |
20 | #include <common/defaults.hpp> | |
48842b30 | 21 | |
28ab034a JG |
22 | #include <inttypes.h> |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <unistd.h> | |
48842b30 | 27 | |
d7bfb9b0 JG |
28 | namespace lsu = lttng::sessiond::ust; |
29 | ||
37278a1e | 30 | /* |
e9404c27 | 31 | * Send a single channel to the consumer using command ASK_CHANNEL_CREATION. |
ffe60014 | 32 | * |
7972aab2 | 33 | * Consumer socket lock MUST be acquired before calling this. |
37278a1e | 34 | */ |
ffe60014 | 35 | static int ask_channel_creation(struct ust_app_session *ua_sess, |
28ab034a JG |
36 | struct ust_app_channel *ua_chan, |
37 | struct consumer_output *consumer, | |
38 | struct consumer_socket *socket, | |
39 | lsu::registry_session *registry, | |
40 | struct lttng_trace_chunk *trace_chunk) | |
37278a1e | 41 | { |
0c759fc9 | 42 | int ret, output; |
7972aab2 DG |
43 | uint32_t chan_id; |
44 | uint64_t key, chan_reg_key; | |
cd9adb8b | 45 | char *pathname = nullptr; |
37278a1e | 46 | struct lttcomm_consumer_msg msg; |
d7ba1388 | 47 | char shm_path[PATH_MAX] = ""; |
3d071855 | 48 | char root_shm_path[PATH_MAX] = ""; |
d2956687 | 49 | bool is_local_trace; |
5da88b0f | 50 | size_t consumer_path_offset = 0; |
37278a1e | 51 | |
a0377dfe FD |
52 | LTTNG_ASSERT(ua_sess); |
53 | LTTNG_ASSERT(ua_chan); | |
54 | LTTNG_ASSERT(socket); | |
55 | LTTNG_ASSERT(consumer); | |
56 | LTTNG_ASSERT(registry); | |
ffe60014 DG |
57 | |
58 | DBG2("Asking UST consumer for channel"); | |
59 | ||
d2956687 JG |
60 | is_local_trace = consumer->net_seq_index == -1ULL; |
61 | /* Format the channel's path (relative to the current trace chunk). */ | |
28ab034a | 62 | pathname = setup_channel_trace_path(consumer, ua_sess->path, &consumer_path_offset); |
d2956687 JG |
63 | if (!pathname) { |
64 | ret = -1; | |
65 | goto error; | |
66 | } | |
67 | ||
68 | if (is_local_trace && trace_chunk) { | |
69 | enum lttng_trace_chunk_status chunk_status; | |
70 | char *pathname_index; | |
71 | ||
28ab034a | 72 | ret = asprintf(&pathname_index, "%s/" DEFAULT_INDEX_DIR, pathname); |
d2956687 JG |
73 | if (ret < 0) { |
74 | ERR("Failed to format channel index directory"); | |
75 | ret = -1; | |
76 | goto error; | |
77 | } | |
78 | ||
79 | /* | |
80 | * Create the index subdirectory which will take care | |
81 | * of implicitly creating the channel's path. | |
82 | */ | |
28ab034a | 83 | chunk_status = lttng_trace_chunk_create_subdirectory(trace_chunk, pathname_index); |
d2956687 JG |
84 | free(pathname_index); |
85 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
10a50311 JD |
86 | ret = -1; |
87 | goto error; | |
88 | } | |
ffe60014 DG |
89 | } |
90 | ||
7972aab2 DG |
91 | /* Depending on the buffer type, a different channel key is used. */ |
92 | if (ua_sess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
93 | chan_reg_key = ua_chan->tracing_channel_id; | |
94 | } else { | |
95 | chan_reg_key = ua_chan->key; | |
96 | } | |
97 | ||
fc4b93fa | 98 | if (ua_chan->attr.type == LTTNG_UST_ABI_CHAN_METADATA) { |
7972aab2 | 99 | chan_id = -1U; |
d7ba1388 MD |
100 | /* |
101 | * Metadata channels shm_path (buffers) are handled within | |
102 | * session daemon. Consumer daemon should not try to create | |
103 | * those buffer files. | |
104 | */ | |
7972aab2 | 105 | } else { |
d7bfb9b0 JG |
106 | { |
107 | auto locked_registry = registry->lock(); | |
4bcf2294 | 108 | auto& ust_reg_chan = registry->channel(chan_reg_key); |
d7bfb9b0 JG |
109 | |
110 | chan_id = ust_reg_chan.id; | |
111 | } | |
112 | ||
d7ba1388 MD |
113 | if (ua_sess->shm_path[0]) { |
114 | strncpy(shm_path, ua_sess->shm_path, sizeof(shm_path)); | |
115 | shm_path[sizeof(shm_path) - 1] = '\0'; | |
28ab034a JG |
116 | strncat(shm_path, "/", sizeof(shm_path) - strlen(shm_path) - 1); |
117 | strncat(shm_path, ua_chan->name, sizeof(shm_path) - strlen(shm_path) - 1); | |
118 | strncat(shm_path, "_", sizeof(shm_path) - strlen(shm_path) - 1); | |
d7ba1388 | 119 | } |
3d071855 MD |
120 | strncpy(root_shm_path, ua_sess->root_shm_path, sizeof(root_shm_path)); |
121 | root_shm_path[sizeof(root_shm_path) - 1] = '\0'; | |
7972aab2 DG |
122 | } |
123 | ||
0c759fc9 | 124 | switch (ua_chan->attr.output) { |
fc4b93fa | 125 | case LTTNG_UST_ABI_MMAP: |
0c759fc9 DG |
126 | default: |
127 | output = LTTNG_EVENT_MMAP; | |
128 | break; | |
129 | } | |
130 | ||
ffe60014 | 131 | consumer_init_ask_channel_comm_msg(&msg, |
28ab034a JG |
132 | ua_chan->attr.subbuf_size, |
133 | ua_chan->attr.num_subbuf, | |
134 | ua_chan->attr.overwrite, | |
135 | ua_chan->attr.switch_timer_interval, | |
136 | ua_chan->attr.read_timer_interval, | |
137 | ua_sess->live_timer_interval, | |
138 | ua_sess->live_timer_interval != 0, | |
139 | ua_chan->monitor_timer_interval, | |
140 | output, | |
141 | (int) ua_chan->attr.type, | |
142 | ua_sess->tracing_id, | |
143 | &pathname[consumer_path_offset], | |
144 | ua_chan->name, | |
145 | consumer->net_seq_index, | |
146 | ua_chan->key, | |
147 | registry->uuid, | |
148 | chan_id, | |
149 | ua_chan->tracefile_size, | |
150 | ua_chan->tracefile_count, | |
151 | ua_sess->id, | |
152 | ua_sess->output_traces, | |
153 | lttng_credentials_get_uid(&ua_sess->real_credentials), | |
154 | ua_chan->attr.blocking_timeout, | |
155 | root_shm_path, | |
156 | shm_path, | |
157 | trace_chunk, | |
158 | &ua_sess->effective_credentials); | |
37278a1e | 159 | |
840cb59c | 160 | health_code_update(); |
ca03de58 | 161 | |
52898cb1 | 162 | ret = consumer_socket_send(socket, &msg, sizeof(msg)); |
37278a1e DG |
163 | if (ret < 0) { |
164 | goto error; | |
165 | } | |
166 | ||
28ab034a | 167 | ret = consumer_recv_status_channel(socket, &key, &ua_chan->expected_stream_count); |
ffe60014 DG |
168 | if (ret < 0) { |
169 | goto error; | |
170 | } | |
171 | /* Communication protocol error. */ | |
a0377dfe | 172 | LTTNG_ASSERT(key == ua_chan->key); |
ffe60014 | 173 | /* We need at least one where 1 stream for 1 cpu. */ |
10a50311 | 174 | if (ua_sess->output_traces) { |
a0377dfe | 175 | LTTNG_ASSERT(ua_chan->expected_stream_count > 0); |
10a50311 | 176 | } |
ffe60014 | 177 | |
28ab034a JG |
178 | DBG2("UST ask channel %" PRIu64 " successfully done with %u stream(s)", |
179 | key, | |
180 | ua_chan->expected_stream_count); | |
ca03de58 | 181 | |
37278a1e | 182 | error: |
ffe60014 DG |
183 | free(pathname); |
184 | health_code_update(); | |
37278a1e DG |
185 | return ret; |
186 | } | |
187 | ||
188 | /* | |
ffe60014 DG |
189 | * Ask consumer to create a channel for a given session. |
190 | * | |
e9404c27 JG |
191 | * Session list and rcu read side locks must be held by the caller. |
192 | * | |
ffe60014 | 193 | * Returns 0 on success else a negative value. |
37278a1e | 194 | */ |
ffe60014 | 195 | int ust_consumer_ask_channel(struct ust_app_session *ua_sess, |
28ab034a JG |
196 | struct ust_app_channel *ua_chan, |
197 | struct consumer_output *consumer, | |
198 | struct consumer_socket *socket, | |
199 | lsu::registry_session *registry, | |
200 | struct lttng_trace_chunk *trace_chunk) | |
37278a1e DG |
201 | { |
202 | int ret; | |
37278a1e | 203 | |
a0377dfe FD |
204 | LTTNG_ASSERT(ua_sess); |
205 | LTTNG_ASSERT(ua_chan); | |
206 | LTTNG_ASSERT(consumer); | |
207 | LTTNG_ASSERT(socket); | |
208 | LTTNG_ASSERT(registry); | |
f50f23d9 | 209 | |
d9078d0c DG |
210 | if (!consumer->enabled) { |
211 | ret = -LTTNG_ERR_NO_CONSUMER; | |
212 | DBG3("Consumer is disabled"); | |
213 | goto error; | |
214 | } | |
215 | ||
ffe60014 | 216 | pthread_mutex_lock(socket->lock); |
28ab034a | 217 | ret = ask_channel_creation(ua_sess, ua_chan, consumer, socket, registry, trace_chunk); |
2898de39 | 218 | pthread_mutex_unlock(socket->lock); |
37278a1e | 219 | if (ret < 0) { |
e9404c27 | 220 | ERR("ask_channel_creation consumer command failed"); |
37278a1e DG |
221 | goto error; |
222 | } | |
223 | ||
48842b30 DG |
224 | error: |
225 | return ret; | |
226 | } | |
227 | ||
228 | /* | |
ffe60014 DG |
229 | * Send a get channel command to consumer using the given channel key. The |
230 | * channel object is populated and the stream list. | |
231 | * | |
232 | * Return 0 on success else a negative value. | |
48842b30 | 233 | */ |
28ab034a | 234 | int ust_consumer_get_channel(struct consumer_socket *socket, struct ust_app_channel *ua_chan) |
48842b30 | 235 | { |
ffe60014 | 236 | int ret; |
37278a1e | 237 | struct lttcomm_consumer_msg msg; |
48842b30 | 238 | |
a0377dfe FD |
239 | LTTNG_ASSERT(ua_chan); |
240 | LTTNG_ASSERT(socket); | |
48842b30 | 241 | |
53efb85a | 242 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
243 | msg.cmd_type = LTTNG_CONSUMER_GET_CHANNEL; |
244 | msg.u.get_channel.key = ua_chan->key; | |
37278a1e | 245 | |
ffe60014 | 246 | pthread_mutex_lock(socket->lock); |
840cb59c | 247 | health_code_update(); |
ca03de58 | 248 | |
ffe60014 DG |
249 | /* Send command and wait for OK reply. */ |
250 | ret = consumer_send_msg(socket, &msg); | |
37278a1e DG |
251 | if (ret < 0) { |
252 | goto error; | |
253 | } | |
254 | ||
ffe60014 | 255 | /* First, get the channel from consumer. */ |
b623cb6a | 256 | ret = lttng_ust_ctl_recv_channel_from_consumer(*socket->fd_ptr, &ua_chan->obj); |
37278a1e | 257 | if (ret < 0) { |
ffe60014 DG |
258 | if (ret != -EPIPE) { |
259 | ERR("Error recv channel from consumer %d with ret %d", | |
28ab034a JG |
260 | *socket->fd_ptr, |
261 | ret); | |
ffe60014 DG |
262 | } else { |
263 | DBG3("UST app recv channel from consumer. Consumer is dead."); | |
264 | } | |
37278a1e DG |
265 | goto error; |
266 | } | |
00e2e675 | 267 | |
ffe60014 | 268 | /* Next, get all streams. */ |
cd9adb8b | 269 | while (true) { |
ffe60014 | 270 | struct ust_app_stream *stream; |
ca03de58 | 271 | |
ffe60014 DG |
272 | /* Create UST stream */ |
273 | stream = ust_app_alloc_stream(); | |
cd9adb8b | 274 | if (stream == nullptr) { |
ffe60014 | 275 | ret = -ENOMEM; |
48842b30 DG |
276 | goto error; |
277 | } | |
278 | ||
ffe60014 | 279 | /* Stream object is populated by this call if successful. */ |
b623cb6a | 280 | ret = lttng_ust_ctl_recv_stream_from_consumer(*socket->fd_ptr, &stream->obj); |
37278a1e | 281 | if (ret < 0) { |
ffe60014 DG |
282 | free(stream); |
283 | if (ret == -LTTNG_UST_ERR_NOENT) { | |
284 | DBG3("UST app consumer has no more stream available"); | |
ffe60014 DG |
285 | break; |
286 | } | |
287 | if (ret != -EPIPE) { | |
288 | ERR("Recv stream from consumer %d with ret %d", | |
28ab034a JG |
289 | *socket->fd_ptr, |
290 | ret); | |
ffe60014 DG |
291 | } else { |
292 | DBG3("UST app recv stream from consumer. Consumer is dead."); | |
00e2e675 | 293 | } |
48842b30 DG |
294 | goto error; |
295 | } | |
37278a1e | 296 | |
ffe60014 DG |
297 | /* Order is important this is why a list is used. */ |
298 | cds_list_add_tail(&stream->list, &ua_chan->streams.head); | |
299 | ua_chan->streams.count++; | |
37278a1e | 300 | |
5368d366 | 301 | DBG2("UST app stream %d received successfully", ua_chan->streams.count); |
ffe60014 DG |
302 | } |
303 | ||
304 | /* This MUST match or else we have a synchronization problem. */ | |
a0377dfe | 305 | LTTNG_ASSERT(ua_chan->expected_stream_count == ua_chan->streams.count); |
ca03de58 | 306 | |
ffe60014 DG |
307 | /* Wait for confirmation that we can proceed with the streams. */ |
308 | ret = consumer_recv_status_reply(socket); | |
37278a1e DG |
309 | if (ret < 0) { |
310 | goto error; | |
311 | } | |
312 | ||
313 | error: | |
ffe60014 DG |
314 | health_code_update(); |
315 | pthread_mutex_unlock(socket->lock); | |
37278a1e DG |
316 | return ret; |
317 | } | |
318 | ||
319 | /* | |
ffe60014 DG |
320 | * Send a destroy channel command to consumer using the given channel key. |
321 | * | |
322 | * Note that this command MUST be used prior to a successful | |
323 | * LTTNG_CONSUMER_GET_CHANNEL because once this command is done successfully, | |
324 | * the streams are dispatched to the consumer threads and MUST be teardown | |
325 | * through the hang up process. | |
326 | * | |
327 | * Return 0 on success else a negative value. | |
37278a1e | 328 | */ |
28ab034a | 329 | int ust_consumer_destroy_channel(struct consumer_socket *socket, struct ust_app_channel *ua_chan) |
37278a1e | 330 | { |
ffe60014 DG |
331 | int ret; |
332 | struct lttcomm_consumer_msg msg; | |
a4b92340 | 333 | |
a0377dfe FD |
334 | LTTNG_ASSERT(ua_chan); |
335 | LTTNG_ASSERT(socket); | |
37278a1e | 336 | |
53efb85a | 337 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
338 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
339 | msg.u.destroy_channel.key = ua_chan->key; | |
173af62f | 340 | |
ffe60014 DG |
341 | pthread_mutex_lock(socket->lock); |
342 | health_code_update(); | |
37278a1e | 343 | |
ffe60014 | 344 | ret = consumer_send_msg(socket, &msg); |
37278a1e DG |
345 | if (ret < 0) { |
346 | goto error; | |
48842b30 DG |
347 | } |
348 | ||
ffe60014 DG |
349 | error: |
350 | health_code_update(); | |
351 | pthread_mutex_unlock(socket->lock); | |
352 | return ret; | |
353 | } | |
aeb96892 | 354 | |
ffe60014 DG |
355 | /* |
356 | * Send a given stream to UST tracer. | |
357 | * | |
358 | * On success return 0 else a negative value. | |
359 | */ | |
360 | int ust_consumer_send_stream_to_ust(struct ust_app *app, | |
28ab034a JG |
361 | struct ust_app_channel *channel, |
362 | struct ust_app_stream *stream) | |
ffe60014 DG |
363 | { |
364 | int ret; | |
365 | ||
a0377dfe FD |
366 | LTTNG_ASSERT(app); |
367 | LTTNG_ASSERT(stream); | |
368 | LTTNG_ASSERT(channel); | |
ffe60014 DG |
369 | |
370 | DBG2("UST consumer send stream to app %d", app->sock); | |
371 | ||
372 | /* Relay stream to application. */ | |
fb45065e | 373 | pthread_mutex_lock(&app->sock_lock); |
b623cb6a | 374 | ret = lttng_ust_ctl_send_stream_to_ust(app->sock, channel->obj, stream->obj); |
fb45065e | 375 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 | 376 | if (ret < 0) { |
be355079 JR |
377 | if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) { |
378 | DBG3("UST app send stream to ust failed. Application is dead. (pid: %d, sock: %d).", | |
28ab034a JG |
379 | app->pid, |
380 | app->sock); | |
be355079 JR |
381 | } else if (ret == -EAGAIN) { |
382 | WARN("UST app send stream to ust failed. Communication time out (pid: %d, sock: %d).", | |
28ab034a JG |
383 | app->pid, |
384 | app->sock); | |
ffe60014 | 385 | } else { |
be355079 | 386 | ERR("UST app send stream, handle %d, to ust failed with ret %d (pid: %d, sock: %d).", |
28ab034a JG |
387 | stream->obj->handle, |
388 | ret, | |
389 | app->pid, | |
390 | app->sock); | |
48842b30 | 391 | } |
ffe60014 | 392 | goto error; |
48842b30 | 393 | } |
d0b96690 | 394 | channel->handle = channel->obj->handle; |
48842b30 | 395 | |
ffe60014 DG |
396 | error: |
397 | return ret; | |
398 | } | |
399 | ||
400 | /* | |
401 | * Send channel previously received from the consumer to the UST tracer. | |
402 | * | |
403 | * On success return 0 else a negative value. | |
404 | */ | |
405 | int ust_consumer_send_channel_to_ust(struct ust_app *app, | |
28ab034a JG |
406 | struct ust_app_session *ua_sess, |
407 | struct ust_app_channel *channel) | |
ffe60014 DG |
408 | { |
409 | int ret; | |
410 | ||
a0377dfe FD |
411 | LTTNG_ASSERT(app); |
412 | LTTNG_ASSERT(ua_sess); | |
413 | LTTNG_ASSERT(channel); | |
414 | LTTNG_ASSERT(channel->obj); | |
ffe60014 | 415 | |
7972aab2 | 416 | DBG2("UST app send channel to sock %d pid %d (name: %s, key: %" PRIu64 ")", |
28ab034a JG |
417 | app->sock, |
418 | app->pid, | |
419 | channel->name, | |
420 | channel->tracing_channel_id); | |
48842b30 | 421 | |
ffe60014 | 422 | /* Send stream to application. */ |
fb45065e | 423 | pthread_mutex_lock(&app->sock_lock); |
b623cb6a | 424 | ret = lttng_ust_ctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj); |
fb45065e | 425 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 | 426 | if (ret < 0) { |
be355079 JR |
427 | if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) { |
428 | DBG3("UST app send channel to ust failed. Application is dead (pid: %d, sock: %d).", | |
28ab034a JG |
429 | app->pid, |
430 | app->sock); | |
be355079 JR |
431 | } else if (ret == -EAGAIN) { |
432 | WARN("UST app send channel to ust failed. Communication timeout (pid: %d, sock: %d).", | |
28ab034a JG |
433 | app->pid, |
434 | app->sock); | |
ffe60014 | 435 | } else { |
be355079 | 436 | ERR("UST app send channel %s, to ust failed with ret %d (pid: %d, sock: %d).", |
28ab034a JG |
437 | channel->name, |
438 | ret, | |
439 | app->pid, | |
440 | app->sock); | |
ffe60014 DG |
441 | } |
442 | goto error; | |
443 | } | |
48842b30 DG |
444 | |
445 | error: | |
446 | return ret; | |
447 | } | |
331744e3 JD |
448 | |
449 | /* | |
450 | * Handle the metadata requests from the UST consumer | |
451 | * | |
452 | * Return 0 on success else a negative value. | |
453 | */ | |
454 | int ust_consumer_metadata_request(struct consumer_socket *socket) | |
455 | { | |
456 | int ret; | |
457 | ssize_t ret_push; | |
458 | struct lttcomm_metadata_request_msg request; | |
459 | struct buffer_reg_uid *reg_uid; | |
b0f2e8db | 460 | lsu::registry_session *ust_reg; |
331744e3 JD |
461 | struct lttcomm_consumer_msg msg; |
462 | ||
a0377dfe | 463 | LTTNG_ASSERT(socket); |
331744e3 | 464 | |
56047f5a | 465 | lttng::urcu::read_lock_guard read_lock; |
331744e3 JD |
466 | health_code_update(); |
467 | ||
468 | /* Wait for a metadata request */ | |
dc2bbdae | 469 | pthread_mutex_lock(socket->lock); |
52898cb1 | 470 | ret = consumer_socket_recv(socket, &request, sizeof(request)); |
dc2bbdae | 471 | pthread_mutex_unlock(socket->lock); |
52898cb1 | 472 | if (ret < 0) { |
331744e3 JD |
473 | goto end; |
474 | } | |
475 | ||
1950109e | 476 | DBG("Metadata request received for session %" PRIu64 ", key %" PRIu64, |
28ab034a JG |
477 | request.session_id, |
478 | request.key); | |
331744e3 | 479 | |
28ab034a | 480 | reg_uid = buffer_reg_uid_find(request.session_id, request.bits_per_long, request.uid); |
331744e3 JD |
481 | if (reg_uid) { |
482 | ust_reg = reg_uid->registry->reg.ust; | |
483 | } else { | |
28ab034a | 484 | struct buffer_reg_pid *reg_pid = buffer_reg_pid_find(request.session_id_per_pid); |
331744e3 | 485 | if (!reg_pid) { |
1950109e | 486 | DBG("PID registry not found for session id %" PRIu64, |
28ab034a | 487 | request.session_id_per_pid); |
331744e3 | 488 | |
53efb85a | 489 | memset(&msg, 0, sizeof(msg)); |
331744e3 | 490 | msg.cmd_type = LTTNG_ERR_UND; |
cb7d882c | 491 | pthread_mutex_lock(socket->lock); |
331744e3 | 492 | (void) consumer_send_msg(socket, &msg); |
cb7d882c | 493 | pthread_mutex_unlock(socket->lock); |
331744e3 JD |
494 | /* |
495 | * This is possible since the session might have been destroyed | |
496 | * during a consumer metadata request. So here, return gracefully | |
497 | * because the destroy session will push the remaining metadata to | |
498 | * the consumer. | |
499 | */ | |
500 | ret = 0; | |
501 | goto end; | |
502 | } | |
503 | ust_reg = reg_pid->registry->reg.ust; | |
504 | } | |
a0377dfe | 505 | LTTNG_ASSERT(ust_reg); |
331744e3 | 506 | |
d7bfb9b0 JG |
507 | { |
508 | auto locked_ust_reg = ust_reg->lock(); | |
509 | ret_push = ust_app_push_metadata(locked_ust_reg, socket, 1); | |
510 | } | |
2c57e06d MD |
511 | if (ret_push == -EPIPE) { |
512 | DBG("Application or relay closed while pushing metadata"); | |
513 | } else if (ret_push < 0) { | |
331744e3 JD |
514 | ERR("Pushing metadata"); |
515 | ret = -1; | |
516 | goto end; | |
2c57e06d MD |
517 | } else { |
518 | DBG("UST Consumer metadata pushed successfully"); | |
331744e3 | 519 | } |
331744e3 JD |
520 | ret = 0; |
521 | ||
522 | end: | |
331744e3 JD |
523 | return ret; |
524 | } |