Commit | Line | Data |
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d3e2ba59 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <getopt.h> | |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <sys/mman.h> | |
29 | #include <sys/mount.h> | |
30 | #include <sys/resource.h> | |
31 | #include <sys/socket.h> | |
32 | #include <sys/stat.h> | |
33 | #include <sys/types.h> | |
34 | #include <sys/wait.h> | |
35 | #include <inttypes.h> | |
36 | #include <urcu/futex.h> | |
37 | #include <urcu/uatomic.h> | |
38 | #include <unistd.h> | |
39 | #include <fcntl.h> | |
40 | #include <config.h> | |
41 | ||
42 | #include <lttng/lttng.h> | |
43 | #include <common/common.h> | |
44 | #include <common/compat/poll.h> | |
45 | #include <common/compat/socket.h> | |
f263b7fd | 46 | #include <common/compat/endian.h> |
d3e2ba59 JD |
47 | #include <common/defaults.h> |
48 | #include <common/futex.h> | |
2f8f53af | 49 | #include <common/index/index.h> |
d3e2ba59 JD |
50 | #include <common/sessiond-comm/sessiond-comm.h> |
51 | #include <common/sessiond-comm/inet.h> | |
52 | #include <common/sessiond-comm/relayd.h> | |
53 | #include <common/uri.h> | |
54 | #include <common/utils.h> | |
55 | ||
56 | #include "cmd.h" | |
57 | #include "live.h" | |
58 | #include "lttng-relayd.h" | |
d3e2ba59 | 59 | #include "utils.h" |
eea7556c | 60 | #include "health-relayd.h" |
9b5e0863 | 61 | #include "testpoint.h" |
2f8f53af | 62 | #include "viewer-stream.h" |
2a174661 DG |
63 | #include "stream.h" |
64 | #include "session.h" | |
65 | #include "ctf-trace.h" | |
58eb9381 | 66 | #include "connection.h" |
d3e2ba59 JD |
67 | |
68 | static struct lttng_uri *live_uri; | |
69 | ||
d3e2ba59 JD |
70 | /* |
71 | * This pipe is used to inform the worker thread that a command is queued and | |
72 | * ready to be processed. | |
73 | */ | |
58eb9381 | 74 | static int live_conn_pipe[2] = { -1, -1 }; |
d3e2ba59 JD |
75 | |
76 | /* Shared between threads */ | |
77 | static int live_dispatch_thread_exit; | |
78 | ||
79 | static pthread_t live_listener_thread; | |
80 | static pthread_t live_dispatcher_thread; | |
81 | static pthread_t live_worker_thread; | |
82 | ||
83 | /* | |
84 | * Relay command queue. | |
85 | * | |
86 | * The live_thread_listener and live_thread_dispatcher communicate with this | |
87 | * queue. | |
88 | */ | |
58eb9381 | 89 | static struct relay_conn_queue viewer_conn_queue; |
d3e2ba59 JD |
90 | |
91 | static uint64_t last_relay_viewer_session_id; | |
92 | ||
93 | /* | |
94 | * Cleanup the daemon | |
95 | */ | |
96 | static | |
97 | void cleanup(void) | |
98 | { | |
99 | DBG("Cleaning up"); | |
100 | ||
d3e2ba59 JD |
101 | free(live_uri); |
102 | } | |
103 | ||
2f8f53af DG |
104 | /* |
105 | * Receive a request buffer using a given socket, destination allocated buffer | |
106 | * of length size. | |
107 | * | |
108 | * Return the size of the received message or else a negative value on error | |
109 | * with errno being set by recvmsg() syscall. | |
110 | */ | |
111 | static | |
112 | ssize_t recv_request(struct lttcomm_sock *sock, void *buf, size_t size) | |
113 | { | |
114 | ssize_t ret; | |
115 | ||
116 | assert(sock); | |
117 | assert(buf); | |
118 | ||
119 | ret = sock->ops->recvmsg(sock, buf, size, 0); | |
120 | if (ret < 0 || ret != size) { | |
121 | if (ret == 0) { | |
122 | /* Orderly shutdown. Not necessary to print an error. */ | |
123 | DBG("Socket %d did an orderly shutdown", sock->fd); | |
124 | } else { | |
125 | ERR("Relay failed to receive request."); | |
126 | } | |
127 | ret = -1; | |
128 | } | |
129 | ||
130 | return ret; | |
131 | } | |
132 | ||
133 | /* | |
134 | * Send a response buffer using a given socket, source allocated buffer of | |
135 | * length size. | |
136 | * | |
137 | * Return the size of the sent message or else a negative value on error with | |
138 | * errno being set by sendmsg() syscall. | |
139 | */ | |
140 | static | |
141 | ssize_t send_response(struct lttcomm_sock *sock, void *buf, size_t size) | |
142 | { | |
143 | ssize_t ret; | |
144 | ||
145 | assert(sock); | |
146 | assert(buf); | |
147 | ||
148 | ret = sock->ops->sendmsg(sock, buf, size, 0); | |
149 | if (ret < 0) { | |
150 | ERR("Relayd failed to send response."); | |
151 | } | |
152 | ||
153 | return ret; | |
154 | } | |
155 | ||
156 | /* | |
f04a971b JD |
157 | * Atomically check if new streams got added in one of the sessions attached |
158 | * and reset the flag to 0. | |
2f8f53af DG |
159 | * |
160 | * Returns 1 if new streams got added, 0 if nothing changed, a negative value | |
161 | * on error. | |
162 | */ | |
163 | static | |
f04a971b | 164 | int check_new_streams(struct relay_connection *conn) |
2f8f53af | 165 | { |
2f8f53af | 166 | struct relay_session *session; |
f04a971b JD |
167 | unsigned long current_val; |
168 | int ret = 0; | |
2f8f53af | 169 | |
f04a971b JD |
170 | if (!conn->viewer_session) { |
171 | goto end; | |
172 | } | |
173 | cds_list_for_each_entry(session, | |
174 | &conn->viewer_session->sessions_head, | |
175 | viewer_session_list) { | |
176 | current_val = uatomic_cmpxchg(&session->new_streams, 1, 0); | |
177 | ret = current_val; | |
178 | if (ret == 1) { | |
179 | goto end; | |
180 | } | |
2f8f53af DG |
181 | } |
182 | ||
f04a971b | 183 | end: |
2f8f53af DG |
184 | return ret; |
185 | } | |
186 | ||
187 | /* | |
188 | * Send viewer streams to the given socket. The ignore_sent_flag indicates if | |
189 | * this function should ignore the sent flag or not. | |
190 | * | |
191 | * Return 0 on success or else a negative value. | |
192 | */ | |
193 | static | |
194 | ssize_t send_viewer_streams(struct lttcomm_sock *sock, | |
195 | struct relay_session *session, unsigned int ignore_sent_flag) | |
196 | { | |
197 | ssize_t ret; | |
198 | struct lttng_viewer_stream send_stream; | |
199 | struct lttng_ht_iter iter; | |
200 | struct relay_viewer_stream *vstream; | |
201 | ||
202 | assert(session); | |
203 | ||
204 | rcu_read_lock(); | |
205 | ||
206 | cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, vstream, | |
207 | stream_n.node) { | |
2a174661 DG |
208 | struct ctf_trace *ctf_trace; |
209 | ||
2f8f53af DG |
210 | health_code_update(); |
211 | ||
212 | /* Ignore if not the same session. */ | |
213 | if (vstream->session_id != session->id || | |
214 | (!ignore_sent_flag && vstream->sent_flag)) { | |
215 | continue; | |
216 | } | |
217 | ||
2a174661 DG |
218 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, |
219 | vstream->path_name); | |
220 | assert(ctf_trace); | |
221 | ||
2f8f53af | 222 | send_stream.id = htobe64(vstream->stream_handle); |
2a174661 | 223 | send_stream.ctf_trace_id = htobe64(ctf_trace->id); |
2f8f53af DG |
224 | send_stream.metadata_flag = htobe32(vstream->metadata_flag); |
225 | strncpy(send_stream.path_name, vstream->path_name, | |
226 | sizeof(send_stream.path_name)); | |
227 | strncpy(send_stream.channel_name, vstream->channel_name, | |
228 | sizeof(send_stream.channel_name)); | |
229 | ||
230 | DBG("Sending stream %" PRIu64 " to viewer", vstream->stream_handle); | |
231 | ret = send_response(sock, &send_stream, sizeof(send_stream)); | |
232 | if (ret < 0) { | |
233 | goto end_unlock; | |
234 | } | |
235 | vstream->sent_flag = 1; | |
236 | } | |
237 | ||
238 | ret = 0; | |
239 | ||
240 | end_unlock: | |
241 | rcu_read_unlock(); | |
242 | return ret; | |
243 | } | |
244 | ||
245 | /* | |
246 | * Create every viewer stream possible for the given session with the seek | |
247 | * type. Three counters *can* be return which are in order the total amount of | |
248 | * viewer stream of the session, the number of unsent stream and the number of | |
249 | * stream created. Those counters can be NULL and thus will be ignored. | |
250 | * | |
251 | * Return 0 on success or else a negative value. | |
252 | */ | |
253 | static | |
254 | int make_viewer_streams(struct relay_session *session, | |
255 | enum lttng_viewer_seek seek_t, uint32_t *nb_total, uint32_t *nb_unsent, | |
256 | uint32_t *nb_created) | |
257 | { | |
258 | int ret; | |
2f8f53af | 259 | struct lttng_ht_iter iter; |
2a174661 | 260 | struct ctf_trace *ctf_trace; |
2f8f53af DG |
261 | |
262 | assert(session); | |
263 | ||
264 | /* | |
265 | * This is to make sure we create viewer streams for a full received | |
266 | * channel. For instance, if we have 8 streams for a channel that are | |
267 | * concurrently being flagged ready, we can end up creating just a subset | |
268 | * of the 8 streams (the ones that are flagged). This lock avoids this | |
269 | * limbo state. | |
270 | */ | |
271 | pthread_mutex_lock(&session->viewer_ready_lock); | |
272 | ||
273 | /* | |
274 | * Create viewer streams for relay streams that are ready to be used for a | |
275 | * the given session id only. | |
276 | */ | |
2a174661 DG |
277 | rcu_read_lock(); |
278 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
279 | node.node) { | |
280 | struct relay_stream *stream; | |
2f8f53af DG |
281 | |
282 | health_code_update(); | |
283 | ||
2a174661 | 284 | if (ctf_trace->invalid_flag) { |
2f8f53af DG |
285 | continue; |
286 | } | |
287 | ||
2a174661 DG |
288 | cds_list_for_each_entry(stream, &ctf_trace->stream_list, trace_list) { |
289 | struct relay_viewer_stream *vstream; | |
290 | ||
291 | if (!stream->viewer_ready) { | |
292 | continue; | |
293 | } | |
294 | ||
295 | vstream = viewer_stream_find_by_id(stream->stream_handle); | |
2f8f53af | 296 | if (!vstream) { |
2a174661 DG |
297 | vstream = viewer_stream_create(stream, seek_t, ctf_trace); |
298 | if (!vstream) { | |
299 | ret = -1; | |
300 | goto error_unlock; | |
301 | } | |
302 | /* Acquire reference to ctf_trace. */ | |
303 | ctf_trace_get_ref(ctf_trace); | |
304 | ||
305 | if (nb_created) { | |
306 | /* Update number of created stream counter. */ | |
307 | (*nb_created)++; | |
308 | } | |
309 | } else if (!vstream->sent_flag && nb_unsent) { | |
310 | /* Update number of unsent stream counter. */ | |
311 | (*nb_unsent)++; | |
2f8f53af | 312 | } |
2a174661 DG |
313 | /* Update number of total stream counter. */ |
314 | if (nb_total) { | |
315 | (*nb_total)++; | |
2f8f53af | 316 | } |
2f8f53af DG |
317 | } |
318 | } | |
319 | ||
320 | ret = 0; | |
321 | ||
322 | error_unlock: | |
2a174661 | 323 | rcu_read_unlock(); |
2f8f53af DG |
324 | pthread_mutex_unlock(&session->viewer_ready_lock); |
325 | return ret; | |
326 | } | |
327 | ||
d3e2ba59 JD |
328 | /* |
329 | * Write to writable pipe used to notify a thread. | |
330 | */ | |
331 | static | |
332 | int notify_thread_pipe(int wpipe) | |
333 | { | |
6cd525e8 | 334 | ssize_t ret; |
d3e2ba59 | 335 | |
6cd525e8 MD |
336 | ret = lttng_write(wpipe, "!", 1); |
337 | if (ret < 1) { | |
d3e2ba59 JD |
338 | PERROR("write poll pipe"); |
339 | } | |
340 | ||
6cd525e8 | 341 | return (int) ret; |
d3e2ba59 JD |
342 | } |
343 | ||
344 | /* | |
345 | * Stop all threads by closing the thread quit pipe. | |
346 | */ | |
347 | static | |
348 | void stop_threads(void) | |
349 | { | |
350 | int ret; | |
351 | ||
352 | /* Stopping all threads */ | |
353 | DBG("Terminating all live threads"); | |
bcf4a440 | 354 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
d3e2ba59 JD |
355 | if (ret < 0) { |
356 | ERR("write error on thread quit pipe"); | |
357 | } | |
358 | ||
359 | /* Dispatch thread */ | |
360 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); | |
58eb9381 | 361 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
362 | } |
363 | ||
d3e2ba59 JD |
364 | /* |
365 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
366 | */ | |
367 | static | |
368 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
369 | { | |
370 | int ret; | |
371 | ||
372 | if (events == NULL || size == 0) { | |
373 | ret = -1; | |
374 | goto error; | |
375 | } | |
376 | ||
377 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
378 | if (ret < 0) { | |
379 | goto error; | |
380 | } | |
381 | ||
382 | /* Add quit pipe */ | |
bcf4a440 | 383 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
384 | if (ret < 0) { |
385 | goto error; | |
386 | } | |
387 | ||
388 | return 0; | |
389 | ||
390 | error: | |
391 | return ret; | |
392 | } | |
393 | ||
394 | /* | |
395 | * Check if the thread quit pipe was triggered. | |
396 | * | |
397 | * Return 1 if it was triggered else 0; | |
398 | */ | |
399 | static | |
bcf4a440 | 400 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 401 | { |
bcf4a440 | 402 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
403 | return 1; |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | /* | |
410 | * Create and init socket from uri. | |
411 | */ | |
412 | static | |
413 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
414 | { | |
415 | int ret; | |
416 | struct lttcomm_sock *sock = NULL; | |
417 | ||
418 | sock = lttcomm_alloc_sock_from_uri(uri); | |
419 | if (sock == NULL) { | |
420 | ERR("Allocating socket"); | |
421 | goto error; | |
422 | } | |
423 | ||
424 | ret = lttcomm_create_sock(sock); | |
425 | if (ret < 0) { | |
426 | goto error; | |
427 | } | |
428 | DBG("Listening on sock %d for live", sock->fd); | |
429 | ||
430 | ret = sock->ops->bind(sock); | |
431 | if (ret < 0) { | |
432 | goto error; | |
433 | } | |
434 | ||
435 | ret = sock->ops->listen(sock, -1); | |
436 | if (ret < 0) { | |
437 | goto error; | |
438 | ||
439 | } | |
440 | ||
441 | return sock; | |
442 | ||
443 | error: | |
444 | if (sock) { | |
445 | lttcomm_destroy_sock(sock); | |
446 | } | |
447 | return NULL; | |
448 | } | |
449 | ||
450 | /* | |
451 | * This thread manages the listening for new connections on the network | |
452 | */ | |
453 | static | |
454 | void *thread_listener(void *data) | |
455 | { | |
456 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
457 | uint32_t revents, nb_fd; |
458 | struct lttng_poll_event events; | |
459 | struct lttcomm_sock *live_control_sock; | |
460 | ||
461 | DBG("[thread] Relay live listener started"); | |
462 | ||
eea7556c MD |
463 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
464 | ||
465 | health_code_update(); | |
466 | ||
d3e2ba59 JD |
467 | live_control_sock = init_socket(live_uri); |
468 | if (!live_control_sock) { | |
469 | goto error_sock_control; | |
470 | } | |
471 | ||
fb4d42ab | 472 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
d3e2ba59 JD |
473 | ret = create_thread_poll_set(&events, 2); |
474 | if (ret < 0) { | |
475 | goto error_create_poll; | |
476 | } | |
477 | ||
478 | /* Add the control socket */ | |
479 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
480 | if (ret < 0) { | |
481 | goto error_poll_add; | |
482 | } | |
483 | ||
3fd27398 MD |
484 | lttng_relay_notify_ready(); |
485 | ||
9b5e0863 MD |
486 | if (testpoint(relayd_thread_live_listener)) { |
487 | goto error_testpoint; | |
488 | } | |
489 | ||
d3e2ba59 | 490 | while (1) { |
eea7556c MD |
491 | health_code_update(); |
492 | ||
d3e2ba59 JD |
493 | DBG("Listener accepting live viewers connections"); |
494 | ||
495 | restart: | |
eea7556c | 496 | health_poll_entry(); |
d3e2ba59 | 497 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 498 | health_poll_exit(); |
d3e2ba59 JD |
499 | if (ret < 0) { |
500 | /* | |
501 | * Restart interrupted system call. | |
502 | */ | |
503 | if (errno == EINTR) { | |
504 | goto restart; | |
505 | } | |
506 | goto error; | |
507 | } | |
508 | nb_fd = ret; | |
509 | ||
510 | DBG("Relay new viewer connection received"); | |
511 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
512 | health_code_update(); |
513 | ||
d3e2ba59 JD |
514 | /* Fetch once the poll data */ |
515 | revents = LTTNG_POLL_GETEV(&events, i); | |
516 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
517 | ||
e0077699 MD |
518 | if (!revents) { |
519 | /* No activity for this FD (poll implementation). */ | |
520 | continue; | |
521 | } | |
522 | ||
d3e2ba59 | 523 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 524 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
525 | if (ret) { |
526 | err = 0; | |
527 | goto exit; | |
528 | } | |
529 | ||
530 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
531 | ERR("socket poll error"); | |
532 | goto error; | |
533 | } else if (revents & LPOLLIN) { | |
534 | /* | |
535 | * Get allocated in this thread, enqueued to a global queue, | |
536 | * dequeued and freed in the worker thread. | |
537 | */ | |
58eb9381 DG |
538 | int val = 1; |
539 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
540 | struct lttcomm_sock *newsock; |
541 | ||
58eb9381 DG |
542 | new_conn = connection_create(); |
543 | if (!new_conn) { | |
d3e2ba59 JD |
544 | goto error; |
545 | } | |
546 | ||
d3e2ba59 JD |
547 | newsock = live_control_sock->ops->accept(live_control_sock); |
548 | if (!newsock) { | |
549 | PERROR("accepting control sock"); | |
58eb9381 | 550 | connection_free(new_conn); |
d3e2ba59 JD |
551 | goto error; |
552 | } | |
553 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 554 | |
d3e2ba59 | 555 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 556 | sizeof(val)); |
d3e2ba59 JD |
557 | if (ret < 0) { |
558 | PERROR("setsockopt inet"); | |
559 | lttcomm_destroy_sock(newsock); | |
58eb9381 | 560 | connection_free(new_conn); |
d3e2ba59 JD |
561 | goto error; |
562 | } | |
58eb9381 | 563 | new_conn->sock = newsock; |
d3e2ba59 | 564 | |
58eb9381 | 565 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
566 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
567 | &new_conn->qnode); | |
d3e2ba59 JD |
568 | |
569 | /* | |
58eb9381 | 570 | * Wake the dispatch queue futex. Implicit memory barrier with |
8bdee6e2 | 571 | * the exchange in cds_wfcq_enqueue. |
d3e2ba59 | 572 | */ |
58eb9381 | 573 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
574 | } |
575 | } | |
576 | } | |
577 | ||
578 | exit: | |
579 | error: | |
580 | error_poll_add: | |
9b5e0863 | 581 | error_testpoint: |
d3e2ba59 JD |
582 | lttng_poll_clean(&events); |
583 | error_create_poll: | |
584 | if (live_control_sock->fd >= 0) { | |
585 | ret = live_control_sock->ops->close(live_control_sock); | |
586 | if (ret) { | |
587 | PERROR("close"); | |
588 | } | |
589 | } | |
590 | lttcomm_destroy_sock(live_control_sock); | |
591 | error_sock_control: | |
592 | if (err) { | |
eea7556c | 593 | health_error(); |
d3e2ba59 JD |
594 | DBG("Live viewer listener thread exited with error"); |
595 | } | |
eea7556c | 596 | health_unregister(health_relayd); |
d3e2ba59 JD |
597 | DBG("Live viewer listener thread cleanup complete"); |
598 | stop_threads(); | |
599 | return NULL; | |
600 | } | |
601 | ||
602 | /* | |
603 | * This thread manages the dispatching of the requests to worker threads | |
604 | */ | |
605 | static | |
606 | void *thread_dispatcher(void *data) | |
607 | { | |
6cd525e8 MD |
608 | int err = -1; |
609 | ssize_t ret; | |
8bdee6e2 | 610 | struct cds_wfcq_node *node; |
58eb9381 | 611 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
612 | |
613 | DBG("[thread] Live viewer relay dispatcher started"); | |
614 | ||
eea7556c MD |
615 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
616 | ||
9b5e0863 MD |
617 | if (testpoint(relayd_thread_live_dispatcher)) { |
618 | goto error_testpoint; | |
619 | } | |
620 | ||
eea7556c MD |
621 | health_code_update(); |
622 | ||
d3e2ba59 | 623 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
624 | health_code_update(); |
625 | ||
d3e2ba59 | 626 | /* Atomically prepare the queue futex */ |
58eb9381 | 627 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
628 | |
629 | do { | |
eea7556c MD |
630 | health_code_update(); |
631 | ||
d3e2ba59 | 632 | /* Dequeue commands */ |
8bdee6e2 SM |
633 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
634 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
635 | if (node == NULL) { |
636 | DBG("Woken up but nothing in the live-viewer " | |
637 | "relay command queue"); | |
638 | /* Continue thread execution */ | |
639 | break; | |
640 | } | |
58eb9381 | 641 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 642 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 643 | conn->sock->fd); |
d3e2ba59 JD |
644 | |
645 | /* | |
646 | * Inform worker thread of the new request. This call is blocking | |
647 | * so we can be assured that the data will be read at some point in | |
648 | * time or wait to the end of the world :) | |
649 | */ | |
58eb9381 DG |
650 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
651 | if (ret < 0) { | |
652 | PERROR("write conn pipe"); | |
653 | connection_destroy(conn); | |
d3e2ba59 JD |
654 | goto error; |
655 | } | |
656 | } while (node != NULL); | |
657 | ||
658 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 659 | health_poll_entry(); |
58eb9381 | 660 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 661 | health_poll_exit(); |
d3e2ba59 JD |
662 | } |
663 | ||
eea7556c MD |
664 | /* Normal exit, no error */ |
665 | err = 0; | |
666 | ||
d3e2ba59 | 667 | error: |
9b5e0863 | 668 | error_testpoint: |
eea7556c MD |
669 | if (err) { |
670 | health_error(); | |
671 | ERR("Health error occurred in %s", __func__); | |
672 | } | |
673 | health_unregister(health_relayd); | |
d3e2ba59 JD |
674 | DBG("Live viewer dispatch thread dying"); |
675 | stop_threads(); | |
676 | return NULL; | |
677 | } | |
678 | ||
679 | /* | |
680 | * Establish connection with the viewer and check the versions. | |
681 | * | |
682 | * Return 0 on success or else negative value. | |
683 | */ | |
684 | static | |
58eb9381 | 685 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
686 | { |
687 | int ret; | |
688 | struct lttng_viewer_connect reply, msg; | |
689 | ||
58eb9381 | 690 | assert(conn); |
d3e2ba59 | 691 | |
58eb9381 | 692 | conn->version_check_done = 1; |
d3e2ba59 | 693 | |
eea7556c MD |
694 | health_code_update(); |
695 | ||
2f8f53af DG |
696 | DBG("Viewer is establishing a connection to the relayd."); |
697 | ||
58eb9381 | 698 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 699 | if (ret < 0) { |
d3e2ba59 JD |
700 | goto end; |
701 | } | |
702 | ||
eea7556c MD |
703 | health_code_update(); |
704 | ||
f46b2ce6 | 705 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
706 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
707 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
708 | ||
709 | /* Major versions must be the same */ | |
710 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
711 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
712 | reply.major, be32toh(msg.major)); | |
72180669 | 713 | ret = -1; |
d3e2ba59 JD |
714 | goto end; |
715 | } | |
716 | ||
58eb9381 | 717 | conn->major = reply.major; |
d3e2ba59 JD |
718 | /* We adapt to the lowest compatible version */ |
719 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 720 | conn->minor = reply.minor; |
d3e2ba59 | 721 | } else { |
58eb9381 | 722 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
723 | } |
724 | ||
c4e361a4 | 725 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 726 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 727 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 728 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
729 | } else { |
730 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
731 | ret = -1; | |
732 | goto end; | |
733 | } | |
734 | ||
735 | reply.major = htobe32(reply.major); | |
736 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 737 | if (conn->type == RELAY_VIEWER_COMMAND) { |
19eba299 MD |
738 | /* |
739 | * Increment outside of htobe64 macro, because can be used more than once | |
740 | * within the macro, and thus the operation may be undefined. | |
741 | */ | |
742 | last_relay_viewer_session_id++; | |
743 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); | |
d3e2ba59 | 744 | } |
eea7556c MD |
745 | |
746 | health_code_update(); | |
747 | ||
58eb9381 | 748 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 749 | if (ret < 0) { |
2f8f53af | 750 | goto end; |
d3e2ba59 JD |
751 | } |
752 | ||
eea7556c MD |
753 | health_code_update(); |
754 | ||
58eb9381 | 755 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
756 | ret = 0; |
757 | ||
758 | end: | |
759 | return ret; | |
760 | } | |
761 | ||
762 | /* | |
763 | * Send the viewer the list of current sessions. | |
764 | * | |
765 | * Return 0 on success or else a negative value. | |
766 | */ | |
767 | static | |
58eb9381 | 768 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
769 | { |
770 | int ret; | |
771 | struct lttng_viewer_list_sessions session_list; | |
772 | unsigned long count; | |
773 | long approx_before, approx_after; | |
d3e2ba59 JD |
774 | struct lttng_ht_iter iter; |
775 | struct lttng_viewer_session send_session; | |
776 | struct relay_session *session; | |
777 | ||
778 | DBG("List sessions received"); | |
779 | ||
d3e2ba59 | 780 | rcu_read_lock(); |
58eb9381 DG |
781 | cds_lfht_count_nodes(conn->sessions_ht->ht, &approx_before, &count, |
782 | &approx_after); | |
d3e2ba59 JD |
783 | session_list.sessions_count = htobe32(count); |
784 | ||
eea7556c MD |
785 | health_code_update(); |
786 | ||
58eb9381 | 787 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
d3e2ba59 | 788 | if (ret < 0) { |
d3e2ba59 JD |
789 | goto end_unlock; |
790 | } | |
791 | ||
eea7556c MD |
792 | health_code_update(); |
793 | ||
58eb9381 | 794 | cds_lfht_for_each_entry(conn->sessions_ht->ht, &iter.iter, session, |
2f8f53af | 795 | session_n.node) { |
eea7556c MD |
796 | health_code_update(); |
797 | ||
d3e2ba59 JD |
798 | strncpy(send_session.session_name, session->session_name, |
799 | sizeof(send_session.session_name)); | |
800 | strncpy(send_session.hostname, session->hostname, | |
801 | sizeof(send_session.hostname)); | |
802 | send_session.id = htobe64(session->id); | |
803 | send_session.live_timer = htobe32(session->live_timer); | |
2a174661 | 804 | send_session.clients = htobe32(session->viewer_refcount); |
87b576ec | 805 | send_session.streams = htobe32(session->stream_count); |
d3e2ba59 | 806 | |
eea7556c MD |
807 | health_code_update(); |
808 | ||
58eb9381 | 809 | ret = send_response(conn->sock, &send_session, sizeof(send_session)); |
d3e2ba59 | 810 | if (ret < 0) { |
d3e2ba59 JD |
811 | goto end_unlock; |
812 | } | |
813 | } | |
eea7556c MD |
814 | health_code_update(); |
815 | ||
d3e2ba59 | 816 | ret = 0; |
d3e2ba59 JD |
817 | end_unlock: |
818 | rcu_read_unlock(); | |
d3e2ba59 JD |
819 | return ret; |
820 | } | |
821 | ||
6763619c JD |
822 | /* |
823 | * Check if a connection is attached to a session. | |
824 | * Return 1 if attached, 0 if not attached, a negative value on error. | |
825 | */ | |
826 | static | |
827 | int session_attached(struct relay_connection *conn, uint64_t session_id) | |
828 | { | |
829 | struct relay_session *session; | |
830 | int found = 0; | |
831 | ||
832 | if (!conn->viewer_session) { | |
833 | goto end; | |
834 | } | |
835 | cds_list_for_each_entry(session, | |
836 | &conn->viewer_session->sessions_head, | |
837 | viewer_session_list) { | |
838 | if (session->id == session_id) { | |
839 | found = 1; | |
840 | goto end; | |
841 | } | |
842 | } | |
843 | ||
844 | end: | |
845 | return found; | |
846 | } | |
847 | ||
d227d5bd JD |
848 | /* |
849 | * Delete all streams for a specific session ID. | |
850 | */ | |
851 | static void destroy_viewer_streams_by_session(struct relay_session *session) | |
852 | { | |
853 | struct relay_viewer_stream *stream; | |
854 | struct lttng_ht_iter iter; | |
855 | ||
856 | assert(session); | |
857 | ||
858 | rcu_read_lock(); | |
859 | cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, stream, | |
860 | stream_n.node) { | |
861 | struct ctf_trace *ctf_trace; | |
862 | ||
863 | health_code_update(); | |
864 | if (stream->session_id != session->id) { | |
865 | continue; | |
866 | } | |
867 | ||
868 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
869 | stream->path_name); | |
870 | assert(ctf_trace); | |
871 | ||
872 | viewer_stream_delete(stream); | |
873 | ||
874 | if (stream->metadata_flag) { | |
875 | ctf_trace->metadata_sent = 0; | |
876 | ctf_trace->viewer_metadata_stream = NULL; | |
877 | } | |
878 | ||
879 | viewer_stream_destroy(ctf_trace, stream); | |
880 | } | |
881 | rcu_read_unlock(); | |
882 | } | |
883 | ||
884 | static void try_destroy_streams(struct relay_session *session) | |
885 | { | |
886 | struct ctf_trace *ctf_trace; | |
887 | struct lttng_ht_iter iter; | |
888 | ||
889 | assert(session); | |
890 | ||
891 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
892 | node.node) { | |
893 | /* Attempt to destroy the ctf trace of that session. */ | |
894 | ctf_trace_try_destroy(session, ctf_trace); | |
895 | } | |
896 | } | |
897 | ||
898 | /* | |
899 | * Cleanup a session. | |
900 | */ | |
901 | static void cleanup_session(struct relay_connection *conn, | |
902 | struct relay_session *session) | |
903 | { | |
904 | /* | |
905 | * Very important that this is done before destroying the session so we | |
906 | * can put back every viewer stream reference from the ctf_trace. | |
907 | */ | |
908 | destroy_viewer_streams_by_session(session); | |
909 | try_destroy_streams(session); | |
910 | cds_list_del(&session->viewer_session_list); | |
911 | session_viewer_try_destroy(conn->sessions_ht, session); | |
912 | } | |
913 | ||
80e8027a JD |
914 | /* |
915 | * Send the viewer the list of current sessions. | |
916 | */ | |
917 | static | |
58eb9381 | 918 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
919 | { |
920 | int ret, send_streams = 0; | |
2f8f53af | 921 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0; |
80e8027a JD |
922 | struct lttng_viewer_new_streams_request request; |
923 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 924 | struct relay_session *session; |
6763619c | 925 | uint64_t session_id; |
80e8027a | 926 | |
58eb9381 | 927 | assert(conn); |
80e8027a JD |
928 | |
929 | DBG("Get new streams received"); | |
930 | ||
80e8027a JD |
931 | health_code_update(); |
932 | ||
2f8f53af | 933 | /* Receive the request from the connected client. */ |
58eb9381 | 934 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 935 | if (ret < 0) { |
80e8027a JD |
936 | goto error; |
937 | } | |
6763619c | 938 | session_id = be64toh(request.session_id); |
80e8027a JD |
939 | |
940 | health_code_update(); | |
941 | ||
53efb85a MD |
942 | memset(&response, 0, sizeof(response)); |
943 | ||
80e8027a | 944 | rcu_read_lock(); |
6763619c | 945 | session = session_find_by_id(conn->sessions_ht, session_id); |
2f8f53af | 946 | if (!session) { |
6763619c | 947 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 948 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
949 | goto send_reply; |
950 | } | |
951 | ||
6763619c | 952 | if (!session_attached(conn, session_id)) { |
80e8027a | 953 | send_streams = 0; |
c4e361a4 | 954 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
955 | goto send_reply; |
956 | } | |
957 | ||
6763619c JD |
958 | send_streams = 1; |
959 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
960 | ||
c4e361a4 | 961 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, NULL, &nb_unsent, |
2f8f53af DG |
962 | &nb_created); |
963 | if (ret < 0) { | |
964 | goto end_unlock; | |
965 | } | |
966 | /* Only send back the newly created streams with the unsent ones. */ | |
967 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
968 | response.streams_count = htobe32(nb_streams); |
969 | ||
4479f682 JD |
970 | /* |
971 | * If the session is closed and we have no new streams to send, | |
972 | * it means that the viewer has already received the whole trace | |
973 | * for this session and should now close it. | |
974 | */ | |
975 | if (nb_streams == 0 && session->close_flag) { | |
976 | send_streams = 0; | |
977 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
6763619c JD |
978 | /* |
979 | * Remove the session from the attached list of the connection | |
980 | * and try to destroy it. | |
981 | */ | |
982 | cds_list_del(&session->viewer_session_list); | |
d227d5bd | 983 | cleanup_session(conn, session); |
4479f682 JD |
984 | goto send_reply; |
985 | } | |
986 | ||
80e8027a JD |
987 | send_reply: |
988 | health_code_update(); | |
58eb9381 | 989 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 990 | if (ret < 0) { |
80e8027a JD |
991 | goto end_unlock; |
992 | } | |
993 | health_code_update(); | |
994 | ||
995 | /* | |
996 | * Unknown or empty session, just return gracefully, the viewer knows what | |
997 | * is happening. | |
998 | */ | |
999 | if (!send_streams || !nb_streams) { | |
1000 | ret = 0; | |
1001 | goto end_unlock; | |
1002 | } | |
1003 | ||
2f8f53af DG |
1004 | /* |
1005 | * Send stream and *DON'T* ignore the sent flag so every viewer streams | |
1006 | * that were not sent from that point will be sent to the viewer. | |
1007 | */ | |
58eb9381 | 1008 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af DG |
1009 | if (ret < 0) { |
1010 | goto end_unlock; | |
80e8027a JD |
1011 | } |
1012 | ||
80e8027a JD |
1013 | end_unlock: |
1014 | rcu_read_unlock(); | |
80e8027a JD |
1015 | error: |
1016 | return ret; | |
1017 | } | |
1018 | ||
d3e2ba59 JD |
1019 | /* |
1020 | * Send the viewer the list of current sessions. | |
1021 | */ | |
1022 | static | |
58eb9381 | 1023 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 1024 | { |
2f8f53af DG |
1025 | int send_streams = 0; |
1026 | ssize_t ret; | |
80e8027a | 1027 | uint32_t nb_streams = 0; |
2f8f53af | 1028 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
1029 | struct lttng_viewer_attach_session_request request; |
1030 | struct lttng_viewer_attach_session_response response; | |
d3e2ba59 JD |
1031 | struct relay_session *session; |
1032 | ||
58eb9381 | 1033 | assert(conn); |
d3e2ba59 | 1034 | |
eea7556c MD |
1035 | health_code_update(); |
1036 | ||
2f8f53af | 1037 | /* Receive the request from the connected client. */ |
58eb9381 | 1038 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1039 | if (ret < 0) { |
d3e2ba59 JD |
1040 | goto error; |
1041 | } | |
1042 | ||
eea7556c MD |
1043 | health_code_update(); |
1044 | ||
53efb85a MD |
1045 | memset(&response, 0, sizeof(response)); |
1046 | ||
c3b7390b JD |
1047 | if (!conn->viewer_session) { |
1048 | DBG("Client trying to attach before creating a live viewer session"); | |
1049 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1050 | goto send_reply; | |
1051 | } | |
1052 | ||
d3e2ba59 | 1053 | rcu_read_lock(); |
58eb9381 DG |
1054 | session = session_find_by_id(conn->sessions_ht, |
1055 | be64toh(request.session_id)); | |
2f8f53af | 1056 | if (!session) { |
d3e2ba59 JD |
1057 | DBG("Relay session %" PRIu64 " not found", |
1058 | be64toh(request.session_id)); | |
c4e361a4 | 1059 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1060 | goto send_reply; |
1061 | } | |
2a174661 DG |
1062 | session_viewer_attach(session); |
1063 | DBG("Attach session ID %" PRIu64 " received", be64toh(request.session_id)); | |
d3e2ba59 | 1064 | |
2a174661 | 1065 | if (uatomic_read(&session->viewer_refcount) > 1) { |
d3e2ba59 | 1066 | DBG("Already a viewer attached"); |
c4e361a4 | 1067 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); |
2a174661 | 1068 | session_viewer_detach(session); |
d3e2ba59 JD |
1069 | goto send_reply; |
1070 | } else if (session->live_timer == 0) { | |
1071 | DBG("Not live session"); | |
c4e361a4 | 1072 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 JD |
1073 | goto send_reply; |
1074 | } else { | |
d3e2ba59 | 1075 | send_streams = 1; |
c4e361a4 | 1076 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
6763619c JD |
1077 | cds_list_add(&session->viewer_session_list, |
1078 | &conn->viewer_session->sessions_head); | |
d3e2ba59 JD |
1079 | } |
1080 | ||
1081 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1082 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1083 | case LTTNG_VIEWER_SEEK_LAST: | |
2f8f53af | 1084 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1085 | break; |
1086 | default: | |
1087 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1088 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1089 | send_streams = 0; |
1090 | goto send_reply; | |
1091 | } | |
1092 | ||
2f8f53af DG |
1093 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, NULL); |
1094 | if (ret < 0) { | |
1095 | goto end_unlock; | |
d3e2ba59 | 1096 | } |
2f8f53af | 1097 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 JD |
1098 | |
1099 | send_reply: | |
eea7556c | 1100 | health_code_update(); |
58eb9381 | 1101 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1102 | if (ret < 0) { |
d3e2ba59 JD |
1103 | goto end_unlock; |
1104 | } | |
eea7556c | 1105 | health_code_update(); |
d3e2ba59 JD |
1106 | |
1107 | /* | |
157df586 | 1108 | * Unknown or empty session, just return gracefully, the viewer knows what |
d3e2ba59 JD |
1109 | * is happening. |
1110 | */ | |
157df586 | 1111 | if (!send_streams || !nb_streams) { |
d3e2ba59 JD |
1112 | ret = 0; |
1113 | goto end_unlock; | |
1114 | } | |
1115 | ||
2f8f53af | 1116 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1117 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af DG |
1118 | if (ret < 0) { |
1119 | goto end_unlock; | |
d3e2ba59 | 1120 | } |
d3e2ba59 JD |
1121 | |
1122 | end_unlock: | |
1123 | rcu_read_unlock(); | |
4a9daf17 JD |
1124 | error: |
1125 | return ret; | |
1126 | } | |
1127 | ||
878c34cf DG |
1128 | /* |
1129 | * Open the index file if needed for the given vstream. | |
1130 | * | |
1131 | * If an index file is successfully opened, the index_read_fd of the stream is | |
1132 | * set with it. | |
1133 | * | |
1134 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
1135 | */ | |
1136 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1137 | struct relay_stream *rstream) | |
1138 | { | |
1139 | int ret = 0; | |
1140 | ||
1141 | assert(vstream); | |
1142 | assert(rstream); | |
1143 | ||
1144 | if (vstream->index_read_fd >= 0) { | |
1145 | goto end; | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * First time, we open the index file and at least one index is ready. The | |
1150 | * race between the read and write of the total_index_received is | |
1151 | * acceptable here since the client will be notified to simply come back | |
1152 | * and get the next index. | |
1153 | */ | |
1154 | if (rstream->total_index_received <= 0) { | |
1155 | ret = -ENOENT; | |
1156 | goto end; | |
1157 | } | |
1158 | ret = index_open(vstream->path_name, vstream->channel_name, | |
1159 | vstream->tracefile_count, vstream->tracefile_count_current); | |
1160 | if (ret >= 0) { | |
1161 | vstream->index_read_fd = ret; | |
1162 | ret = 0; | |
1163 | goto end; | |
1164 | } | |
1165 | ||
1166 | end: | |
1167 | return ret; | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Check the status of the index for the given stream. This function updates | |
1172 | * the index structure if needed and can destroy the vstream also for the HUP | |
1173 | * situation. | |
1174 | * | |
1175 | * Return 0 means that we can proceed with the index. A value of 1 means that | |
1176 | * the index has been updated and is ready to be send to the client. A negative | |
1177 | * value indicates an error that can't be handled. | |
1178 | */ | |
1179 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1180 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1181 | struct lttng_viewer_index *index) | |
1182 | { | |
1183 | int ret; | |
1184 | ||
1185 | assert(vstream); | |
1186 | assert(rstream); | |
1187 | assert(index); | |
1188 | assert(trace); | |
1189 | ||
1190 | if (!rstream->close_flag) { | |
1191 | /* Rotate on abort (overwrite). */ | |
1192 | if (vstream->abort_flag) { | |
1193 | DBG("Viewer stream %" PRIu64 " rotate because of overwrite", | |
1194 | vstream->stream_handle); | |
1195 | ret = viewer_stream_rotate(vstream, rstream); | |
1196 | if (ret < 0) { | |
1197 | goto error; | |
1198 | } else if (ret == 1) { | |
1199 | /* EOF */ | |
1200 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1201 | goto hup; | |
1202 | } | |
1203 | /* ret == 0 means successful so we continue. */ | |
1204 | } | |
1205 | ||
1206 | /* Check if we are in the same trace file at this point. */ | |
1207 | if (rstream->tracefile_count_current == vstream->tracefile_count_current) { | |
1208 | if (rstream->beacon_ts_end != -1ULL && | |
1209 | vstream->last_sent_index == rstream->total_index_received) { | |
1210 | /* | |
1211 | * We've received a synchronization beacon and the last index | |
1212 | * available has been sent, the index for now is inactive. | |
1213 | */ | |
1214 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1215 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
528f2ffa | 1216 | index->stream_id = htobe64(rstream->ctf_stream_id); |
878c34cf | 1217 | goto index_ready; |
ca3aecdf | 1218 | } else if (rstream->total_index_received <= vstream->last_sent_index |
878c34cf DG |
1219 | && !vstream->close_write_flag) { |
1220 | /* | |
1221 | * Reader and writer are working in the same tracefile, so we care | |
1222 | * about the number of index received and sent. Otherwise, we read | |
1223 | * up to EOF. | |
1224 | */ | |
1225 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1226 | goto index_ready; | |
1227 | } | |
1228 | } | |
1229 | /* Nothing to do with the index, continue with it. */ | |
1230 | ret = 0; | |
1231 | } else if (rstream->close_flag && vstream->close_write_flag && | |
1232 | vstream->total_index_received == vstream->last_sent_index) { | |
1233 | /* Last index sent and current tracefile closed in write */ | |
1234 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1235 | goto hup; | |
1236 | } else { | |
1237 | vstream->close_write_flag = 1; | |
1238 | ret = 0; | |
1239 | } | |
1240 | ||
1241 | error: | |
1242 | return ret; | |
1243 | ||
1244 | hup: | |
1245 | viewer_stream_delete(vstream); | |
1246 | viewer_stream_destroy(trace, vstream); | |
1247 | index_ready: | |
1248 | return 1; | |
1249 | } | |
1250 | ||
d3e2ba59 JD |
1251 | /* |
1252 | * Send the next index for a stream. | |
1253 | * | |
1254 | * Return 0 on success or else a negative value. | |
1255 | */ | |
1256 | static | |
58eb9381 | 1257 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1258 | { |
1259 | int ret; | |
878c34cf | 1260 | ssize_t read_ret; |
d3e2ba59 JD |
1261 | struct lttng_viewer_get_next_index request_index; |
1262 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1263 | struct ctf_packet_index packet_index; |
d3e2ba59 JD |
1264 | struct relay_viewer_stream *vstream; |
1265 | struct relay_stream *rstream; | |
2a174661 DG |
1266 | struct ctf_trace *ctf_trace; |
1267 | struct relay_session *session; | |
d3e2ba59 | 1268 | |
58eb9381 | 1269 | assert(conn); |
d3e2ba59 JD |
1270 | |
1271 | DBG("Viewer get next index"); | |
1272 | ||
eea7556c | 1273 | health_code_update(); |
2f8f53af | 1274 | |
58eb9381 | 1275 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1276 | if (ret < 0) { |
d3e2ba59 JD |
1277 | goto end; |
1278 | } | |
eea7556c | 1279 | health_code_update(); |
d3e2ba59 JD |
1280 | |
1281 | rcu_read_lock(); | |
6763619c JD |
1282 | vstream = viewer_stream_find_by_id(be64toh(request_index.stream_id)); |
1283 | if (!vstream) { | |
2a174661 DG |
1284 | ret = -1; |
1285 | goto end_unlock; | |
1286 | } | |
1287 | ||
6763619c JD |
1288 | session = session_find_by_id(conn->sessions_ht, vstream->session_id); |
1289 | if (!session) { | |
d3e2ba59 JD |
1290 | ret = -1; |
1291 | goto end_unlock; | |
1292 | } | |
1293 | ||
2a174661 DG |
1294 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, vstream->path_name); |
1295 | assert(ctf_trace); | |
1296 | ||
d3e2ba59 JD |
1297 | memset(&viewer_index, 0, sizeof(viewer_index)); |
1298 | ||
1299 | /* | |
1300 | * The viewer should not ask for index on metadata stream. | |
1301 | */ | |
1302 | if (vstream->metadata_flag) { | |
c4e361a4 | 1303 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1304 | goto send_reply; |
1305 | } | |
1306 | ||
878c34cf DG |
1307 | rstream = stream_find_by_id(relay_streams_ht, vstream->stream_handle); |
1308 | assert(rstream); | |
1309 | ||
1310 | /* Try to open an index if one is needed for that stream. */ | |
1311 | ret = try_open_index(vstream, rstream); | |
1312 | if (ret < 0) { | |
0e6830aa | 1313 | if (ret == -ENOENT) { |
d3e2ba59 JD |
1314 | /* |
1315 | * The index is created only when the first data packet arrives, it | |
1316 | * might not be ready at the beginning of the session | |
1317 | */ | |
c4e361a4 | 1318 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1319 | } else { |
1320 | /* Unhandled error. */ | |
c4e361a4 | 1321 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1322 | } |
878c34cf | 1323 | goto send_reply; |
d3e2ba59 JD |
1324 | } |
1325 | ||
10b0cd2e | 1326 | pthread_mutex_lock(&rstream->viewer_stream_rotation_lock); |
878c34cf DG |
1327 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
1328 | pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); | |
1329 | if (ret < 0) { | |
5ccf125c | 1330 | goto end_unlock; |
878c34cf DG |
1331 | } else if (ret == 1) { |
1332 | /* | |
1333 | * This means the viewer index data structure has been populated by the | |
1334 | * check call thus we now send back the reply to the client. | |
1335 | */ | |
d3e2ba59 JD |
1336 | goto send_reply; |
1337 | } | |
878c34cf DG |
1338 | /* At this point, ret MUST be 0 thus we continue with the get. */ |
1339 | assert(!ret); | |
d3e2ba59 | 1340 | |
2a174661 DG |
1341 | if (!ctf_trace->metadata_received || |
1342 | ctf_trace->metadata_received > ctf_trace->metadata_sent) { | |
d3e2ba59 JD |
1343 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; |
1344 | } | |
1345 | ||
f04a971b | 1346 | ret = check_new_streams(conn); |
4a9daf17 JD |
1347 | if (ret < 0) { |
1348 | goto end_unlock; | |
1349 | } else if (ret == 1) { | |
1350 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1351 | } | |
1352 | ||
56611b06 | 1353 | pthread_mutex_lock(&rstream->viewer_stream_rotation_lock); |
cef0f7d5 JD |
1354 | pthread_mutex_lock(&vstream->overwrite_lock); |
1355 | if (vstream->abort_flag) { | |
878c34cf | 1356 | /* The file is being overwritten by the writer, we cannot use it. */ |
cef0f7d5 | 1357 | pthread_mutex_unlock(&vstream->overwrite_lock); |
2f8f53af | 1358 | ret = viewer_stream_rotate(vstream, rstream); |
56611b06 | 1359 | pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); |
cef0f7d5 JD |
1360 | if (ret < 0) { |
1361 | goto end_unlock; | |
a020f610 | 1362 | } else if (ret == 1) { |
c4e361a4 | 1363 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
2f8f53af | 1364 | viewer_stream_delete(vstream); |
2a174661 | 1365 | viewer_stream_destroy(ctf_trace, vstream); |
878c34cf DG |
1366 | } else { |
1367 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
cef0f7d5 JD |
1368 | } |
1369 | goto send_reply; | |
1370 | } | |
2f8f53af | 1371 | |
878c34cf | 1372 | read_ret = lttng_read(vstream->index_read_fd, &packet_index, |
6cd525e8 | 1373 | sizeof(packet_index)); |
cef0f7d5 | 1374 | pthread_mutex_unlock(&vstream->overwrite_lock); |
56611b06 | 1375 | pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); |
878c34cf DG |
1376 | if (read_ret < 0) { |
1377 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1378 | viewer_stream_delete(vstream); | |
1379 | viewer_stream_destroy(ctf_trace, vstream); | |
1380 | goto send_reply; | |
1381 | } else if (read_ret < sizeof(packet_index)) { | |
10b0cd2e | 1382 | pthread_mutex_lock(&rstream->viewer_stream_rotation_lock); |
878c34cf | 1383 | if (vstream->close_write_flag) { |
2f8f53af | 1384 | ret = viewer_stream_rotate(vstream, rstream); |
6b6b9a5a | 1385 | if (ret < 0) { |
878c34cf | 1386 | pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); |
6b6b9a5a | 1387 | goto end_unlock; |
a020f610 | 1388 | } else if (ret == 1) { |
c4e361a4 | 1389 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
2f8f53af | 1390 | viewer_stream_delete(vstream); |
2a174661 | 1391 | viewer_stream_destroy(ctf_trace, vstream); |
878c34cf DG |
1392 | } else { |
1393 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
6b6b9a5a JD |
1394 | } |
1395 | } else { | |
878c34cf | 1396 | ERR("Relay reading index file %d", vstream->index_read_fd); |
c4e361a4 | 1397 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
6b6b9a5a | 1398 | } |
878c34cf | 1399 | pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); |
6b6b9a5a | 1400 | goto send_reply; |
d3e2ba59 | 1401 | } else { |
c4e361a4 | 1402 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
d3e2ba59 JD |
1403 | vstream->last_sent_index++; |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * Indexes are stored in big endian, no need to switch before sending. | |
1408 | */ | |
1409 | viewer_index.offset = packet_index.offset; | |
1410 | viewer_index.packet_size = packet_index.packet_size; | |
1411 | viewer_index.content_size = packet_index.content_size; | |
1412 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1413 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1414 | viewer_index.events_discarded = packet_index.events_discarded; | |
1415 | viewer_index.stream_id = packet_index.stream_id; | |
1416 | ||
1417 | send_reply: | |
1418 | viewer_index.flags = htobe32(viewer_index.flags); | |
eea7556c | 1419 | health_code_update(); |
2f8f53af | 1420 | |
58eb9381 | 1421 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1422 | if (ret < 0) { |
d3e2ba59 JD |
1423 | goto end_unlock; |
1424 | } | |
eea7556c | 1425 | health_code_update(); |
d3e2ba59 | 1426 | |
2f8f53af | 1427 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", |
d3e2ba59 JD |
1428 | vstream->last_sent_index, vstream->stream_handle); |
1429 | ||
1430 | end_unlock: | |
1431 | rcu_read_unlock(); | |
1432 | ||
d3e2ba59 JD |
1433 | end: |
1434 | return ret; | |
1435 | } | |
1436 | ||
1437 | /* | |
1438 | * Send the next index for a stream | |
1439 | * | |
1440 | * Return 0 on success or else a negative value. | |
1441 | */ | |
1442 | static | |
58eb9381 | 1443 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1444 | { |
1445 | int ret, send_data = 0; | |
1446 | char *data = NULL; | |
1447 | uint32_t len = 0; | |
1448 | ssize_t read_len; | |
1449 | struct lttng_viewer_get_packet get_packet_info; | |
1450 | struct lttng_viewer_trace_packet reply; | |
1451 | struct relay_viewer_stream *stream; | |
6763619c | 1452 | struct relay_session *session; |
2a174661 | 1453 | struct ctf_trace *ctf_trace; |
d3e2ba59 | 1454 | |
58eb9381 | 1455 | assert(conn); |
d3e2ba59 JD |
1456 | |
1457 | DBG2("Relay get data packet"); | |
1458 | ||
eea7556c | 1459 | health_code_update(); |
2f8f53af | 1460 | |
58eb9381 | 1461 | ret = recv_request(conn->sock, &get_packet_info, sizeof(get_packet_info)); |
2f8f53af | 1462 | if (ret < 0) { |
d3e2ba59 JD |
1463 | goto end; |
1464 | } | |
eea7556c | 1465 | health_code_update(); |
d3e2ba59 | 1466 | |
0233a6a5 DG |
1467 | /* From this point on, the error label can be reached. */ |
1468 | memset(&reply, 0, sizeof(reply)); | |
1469 | ||
d3e2ba59 | 1470 | rcu_read_lock(); |
2f8f53af | 1471 | stream = viewer_stream_find_by_id(be64toh(get_packet_info.stream_id)); |
d3e2ba59 JD |
1472 | if (!stream) { |
1473 | goto error; | |
1474 | } | |
2a174661 | 1475 | |
6763619c JD |
1476 | session = session_find_by_id(conn->sessions_ht, stream->session_id); |
1477 | if (!session) { | |
1478 | ret = -1; | |
1479 | goto error; | |
1480 | } | |
1481 | ||
1482 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
2a174661 DG |
1483 | stream->path_name); |
1484 | assert(ctf_trace); | |
d3e2ba59 JD |
1485 | |
1486 | /* | |
1487 | * First time we read this stream, we need open the tracefile, we should | |
1488 | * only arrive here if an index has already been sent to the viewer, so the | |
1489 | * tracefile must exist, if it does not it is a fatal error. | |
1490 | */ | |
1491 | if (stream->read_fd < 0) { | |
1492 | char fullpath[PATH_MAX]; | |
1493 | ||
6b6b9a5a JD |
1494 | if (stream->tracefile_count > 0) { |
1495 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, stream->path_name, | |
1496 | stream->channel_name, | |
1497 | stream->tracefile_count_current); | |
1498 | } else { | |
1499 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", stream->path_name, | |
1500 | stream->channel_name); | |
1501 | } | |
d3e2ba59 JD |
1502 | if (ret < 0) { |
1503 | goto error; | |
1504 | } | |
1505 | ret = open(fullpath, O_RDONLY); | |
1506 | if (ret < 0) { | |
1507 | PERROR("Relay opening trace file"); | |
1508 | goto error; | |
1509 | } | |
1510 | stream->read_fd = ret; | |
1511 | } | |
1512 | ||
2a174661 DG |
1513 | if (!ctf_trace->metadata_received || |
1514 | ctf_trace->metadata_received > ctf_trace->metadata_sent) { | |
c4e361a4 | 1515 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 | 1516 | reply.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; |
d3e2ba59 JD |
1517 | goto send_reply; |
1518 | } | |
1519 | ||
f04a971b | 1520 | ret = check_new_streams(conn); |
4a9daf17 JD |
1521 | if (ret < 0) { |
1522 | goto end_unlock; | |
1523 | } else if (ret == 1) { | |
c4e361a4 | 1524 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
4a9daf17 JD |
1525 | reply.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; |
1526 | goto send_reply; | |
1527 | } | |
1528 | ||
d3e2ba59 JD |
1529 | len = be32toh(get_packet_info.len); |
1530 | data = zmalloc(len); | |
1531 | if (!data) { | |
1532 | PERROR("relay data zmalloc"); | |
1533 | goto error; | |
1534 | } | |
1535 | ||
1536 | ret = lseek(stream->read_fd, be64toh(get_packet_info.offset), SEEK_SET); | |
1537 | if (ret < 0) { | |
6b6b9a5a JD |
1538 | /* |
1539 | * If the read fd was closed by the streaming side, the | |
1540 | * abort_flag will be set to 1, otherwise it is an error. | |
1541 | */ | |
1542 | if (stream->abort_flag == 0) { | |
1543 | PERROR("lseek"); | |
1544 | goto error; | |
1545 | } | |
c4e361a4 | 1546 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_EOF); |
6b6b9a5a | 1547 | goto send_reply; |
d3e2ba59 | 1548 | } |
6cd525e8 MD |
1549 | read_len = lttng_read(stream->read_fd, data, len); |
1550 | if (read_len < len) { | |
6b6b9a5a JD |
1551 | /* |
1552 | * If the read fd was closed by the streaming side, the | |
1553 | * abort_flag will be set to 1, otherwise it is an error. | |
1554 | */ | |
1555 | if (stream->abort_flag == 0) { | |
1556 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, | |
1557 | stream->read_fd, | |
1558 | be64toh(get_packet_info.offset)); | |
1559 | goto error; | |
1560 | } else { | |
c4e361a4 | 1561 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_EOF); |
6b6b9a5a JD |
1562 | goto send_reply; |
1563 | } | |
d3e2ba59 | 1564 | } |
c4e361a4 | 1565 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1566 | reply.len = htobe32(len); |
1567 | send_data = 1; | |
1568 | goto send_reply; | |
1569 | ||
1570 | error: | |
c4e361a4 | 1571 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1572 | |
1573 | send_reply: | |
1574 | reply.flags = htobe32(reply.flags); | |
eea7556c MD |
1575 | |
1576 | health_code_update(); | |
2f8f53af | 1577 | |
58eb9381 | 1578 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1579 | if (ret < 0) { |
d3e2ba59 JD |
1580 | goto end_unlock; |
1581 | } | |
eea7556c | 1582 | health_code_update(); |
d3e2ba59 JD |
1583 | |
1584 | if (send_data) { | |
eea7556c | 1585 | health_code_update(); |
58eb9381 | 1586 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1587 | if (ret < 0) { |
d3e2ba59 JD |
1588 | goto end_unlock; |
1589 | } | |
eea7556c | 1590 | health_code_update(); |
d3e2ba59 JD |
1591 | } |
1592 | ||
1593 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1594 | be64toh(get_packet_info.stream_id)); | |
1595 | ||
1596 | end_unlock: | |
1597 | free(data); | |
1598 | rcu_read_unlock(); | |
1599 | ||
1600 | end: | |
1601 | return ret; | |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Send the session's metadata | |
1606 | * | |
1607 | * Return 0 on success else a negative value. | |
1608 | */ | |
1609 | static | |
58eb9381 | 1610 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1611 | { |
1612 | int ret = 0; | |
1613 | ssize_t read_len; | |
1614 | uint64_t len = 0; | |
1615 | char *data = NULL; | |
1616 | struct lttng_viewer_get_metadata request; | |
1617 | struct lttng_viewer_metadata_packet reply; | |
1618 | struct relay_viewer_stream *stream; | |
2a174661 | 1619 | struct ctf_trace *ctf_trace; |
6763619c | 1620 | struct relay_session *session; |
d3e2ba59 | 1621 | |
58eb9381 | 1622 | assert(conn); |
d3e2ba59 JD |
1623 | |
1624 | DBG("Relay get metadata"); | |
1625 | ||
eea7556c | 1626 | health_code_update(); |
2f8f53af | 1627 | |
58eb9381 | 1628 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1629 | if (ret < 0) { |
d3e2ba59 JD |
1630 | goto end; |
1631 | } | |
eea7556c | 1632 | health_code_update(); |
d3e2ba59 | 1633 | |
53efb85a MD |
1634 | memset(&reply, 0, sizeof(reply)); |
1635 | ||
d3e2ba59 | 1636 | rcu_read_lock(); |
2f8f53af | 1637 | stream = viewer_stream_find_by_id(be64toh(request.stream_id)); |
d3e2ba59 JD |
1638 | if (!stream || !stream->metadata_flag) { |
1639 | ERR("Invalid metadata stream"); | |
1640 | goto error; | |
1641 | } | |
d3e2ba59 | 1642 | |
6763619c JD |
1643 | session = session_find_by_id(conn->sessions_ht, stream->session_id); |
1644 | if (!session) { | |
1645 | ret = -1; | |
1646 | goto error; | |
1647 | } | |
1648 | ||
1649 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
2a174661 DG |
1650 | stream->path_name); |
1651 | assert(ctf_trace); | |
1652 | assert(ctf_trace->metadata_sent <= ctf_trace->metadata_received); | |
1653 | ||
1654 | len = ctf_trace->metadata_received - ctf_trace->metadata_sent; | |
d3e2ba59 | 1655 | if (len == 0) { |
c4e361a4 | 1656 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1657 | goto send_reply; |
1658 | } | |
1659 | ||
1660 | /* first time, we open the metadata file */ | |
1661 | if (stream->read_fd < 0) { | |
1662 | char fullpath[PATH_MAX]; | |
1663 | ||
1664 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", stream->path_name, | |
1665 | stream->channel_name); | |
1666 | if (ret < 0) { | |
1667 | goto error; | |
1668 | } | |
1669 | ret = open(fullpath, O_RDONLY); | |
1670 | if (ret < 0) { | |
1671 | PERROR("Relay opening metadata file"); | |
1672 | goto error; | |
1673 | } | |
1674 | stream->read_fd = ret; | |
1675 | } | |
1676 | ||
1677 | reply.len = htobe64(len); | |
1678 | data = zmalloc(len); | |
1679 | if (!data) { | |
1680 | PERROR("viewer metadata zmalloc"); | |
1681 | goto error; | |
1682 | } | |
1683 | ||
6cd525e8 MD |
1684 | read_len = lttng_read(stream->read_fd, data, len); |
1685 | if (read_len < len) { | |
d3e2ba59 JD |
1686 | PERROR("Relay reading metadata file"); |
1687 | goto error; | |
1688 | } | |
2a174661 | 1689 | ctf_trace->metadata_sent += read_len; |
c4e361a4 | 1690 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
d3e2ba59 JD |
1691 | goto send_reply; |
1692 | ||
1693 | error: | |
c4e361a4 | 1694 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1695 | |
1696 | send_reply: | |
eea7556c | 1697 | health_code_update(); |
58eb9381 | 1698 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1699 | if (ret < 0) { |
d3e2ba59 JD |
1700 | goto end_unlock; |
1701 | } | |
eea7556c | 1702 | health_code_update(); |
d3e2ba59 JD |
1703 | |
1704 | if (len > 0) { | |
58eb9381 | 1705 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1706 | if (ret < 0) { |
d3e2ba59 JD |
1707 | goto end_unlock; |
1708 | } | |
1709 | } | |
1710 | ||
1711 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1712 | be64toh(request.stream_id)); | |
1713 | ||
1714 | DBG("Metadata sent"); | |
1715 | ||
1716 | end_unlock: | |
1717 | free(data); | |
1718 | rcu_read_unlock(); | |
1719 | end: | |
1720 | return ret; | |
1721 | } | |
1722 | ||
c3b7390b JD |
1723 | /* |
1724 | * Create a viewer session. | |
1725 | * | |
1726 | * Return 0 on success or else a negative value. | |
1727 | */ | |
1728 | static | |
1729 | int viewer_create_session(struct relay_connection *conn) | |
1730 | { | |
1731 | int ret; | |
1732 | struct lttng_viewer_create_session_response resp; | |
1733 | ||
1734 | DBG("Viewer create session received"); | |
1735 | ||
53efb85a | 1736 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1737 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
32816a93 | 1738 | conn->viewer_session = zmalloc(sizeof(*conn->viewer_session)); |
c3b7390b JD |
1739 | if (!conn->viewer_session) { |
1740 | ERR("Allocation viewer session"); | |
1741 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1742 | goto send_reply; | |
1743 | } | |
1744 | CDS_INIT_LIST_HEAD(&conn->viewer_session->sessions_head); | |
1745 | ||
1746 | send_reply: | |
1747 | health_code_update(); | |
1748 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1749 | if (ret < 0) { | |
1750 | goto end; | |
1751 | } | |
1752 | health_code_update(); | |
1753 | ret = 0; | |
1754 | ||
1755 | end: | |
1756 | return ret; | |
1757 | } | |
1758 | ||
1759 | ||
d3e2ba59 JD |
1760 | /* |
1761 | * live_relay_unknown_command: send -1 if received unknown command | |
1762 | */ | |
1763 | static | |
58eb9381 | 1764 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1765 | { |
1766 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1767 | |
53efb85a | 1768 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1769 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1770 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1771 | } |
1772 | ||
1773 | /* | |
1774 | * Process the commands received on the control socket | |
1775 | */ | |
1776 | static | |
1777 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1778 | struct relay_connection *conn) |
d3e2ba59 JD |
1779 | { |
1780 | int ret = 0; | |
2f8f53af DG |
1781 | uint32_t msg_value; |
1782 | ||
1783 | assert(recv_hdr); | |
58eb9381 | 1784 | assert(conn); |
2f8f53af DG |
1785 | |
1786 | msg_value = be32toh(recv_hdr->cmd); | |
1787 | ||
1788 | /* | |
1789 | * Make sure we've done the version check before any command other then a | |
1790 | * new client connection. | |
1791 | */ | |
c4e361a4 | 1792 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1793 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1794 | ret = -1; |
1795 | goto end; | |
1796 | } | |
d3e2ba59 | 1797 | |
2f8f53af | 1798 | switch (msg_value) { |
c4e361a4 | 1799 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1800 | ret = viewer_connect(conn); |
d3e2ba59 | 1801 | break; |
c4e361a4 | 1802 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1803 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1804 | break; |
c4e361a4 | 1805 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1806 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1807 | break; |
c4e361a4 | 1808 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1809 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1810 | break; |
c4e361a4 | 1811 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1812 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1813 | break; |
c4e361a4 | 1814 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1815 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1816 | break; |
c4e361a4 | 1817 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1818 | ret = viewer_get_new_streams(conn); |
80e8027a | 1819 | break; |
c3b7390b JD |
1820 | case LTTNG_VIEWER_CREATE_SESSION: |
1821 | ret = viewer_create_session(conn); | |
1822 | break; | |
d3e2ba59 JD |
1823 | default: |
1824 | ERR("Received unknown viewer command (%u)", be32toh(recv_hdr->cmd)); | |
58eb9381 | 1825 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1826 | ret = -1; |
1827 | goto end; | |
1828 | } | |
1829 | ||
1830 | end: | |
1831 | return ret; | |
1832 | } | |
1833 | ||
1834 | static | |
58eb9381 | 1835 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1836 | { |
1837 | int ret; | |
1838 | ||
1839 | assert(events); | |
1840 | ||
58eb9381 | 1841 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1842 | |
1843 | ret = close(pollfd); | |
1844 | if (ret < 0) { | |
1845 | ERR("Closing pollfd %d", pollfd); | |
1846 | } | |
1847 | } | |
1848 | ||
d3e2ba59 | 1849 | /* |
58eb9381 | 1850 | * Delete and destroy a connection. |
d3e2ba59 JD |
1851 | * |
1852 | * RCU read side lock MUST be acquired. | |
1853 | */ | |
58eb9381 DG |
1854 | static void destroy_connection(struct lttng_ht *relay_connections_ht, |
1855 | struct relay_connection *conn) | |
d3e2ba59 | 1856 | { |
6763619c | 1857 | struct relay_session *session, *tmp_session; |
d3e2ba59 JD |
1858 | |
1859 | assert(relay_connections_ht); | |
58eb9381 | 1860 | assert(conn); |
d3e2ba59 | 1861 | |
58eb9381 | 1862 | connection_delete(relay_connections_ht, conn); |
d3e2ba59 | 1863 | |
6763619c JD |
1864 | if (!conn->viewer_session) { |
1865 | goto end; | |
1866 | } | |
1867 | ||
58eb9381 | 1868 | rcu_read_lock(); |
6763619c JD |
1869 | cds_list_for_each_entry_safe(session, tmp_session, |
1870 | &conn->viewer_session->sessions_head, | |
1871 | viewer_session_list) { | |
1872 | DBG("Cleaning connection of session ID %" PRIu64, session->id); | |
d227d5bd | 1873 | cleanup_session(conn, session); |
2a174661 DG |
1874 | } |
1875 | rcu_read_unlock(); | |
d3e2ba59 | 1876 | |
6763619c | 1877 | end: |
58eb9381 | 1878 | connection_destroy(conn); |
d3e2ba59 JD |
1879 | } |
1880 | ||
1881 | /* | |
1882 | * This thread does the actual work | |
1883 | */ | |
1884 | static | |
1885 | void *thread_worker(void *data) | |
1886 | { | |
1887 | int ret, err = -1; | |
1888 | uint32_t nb_fd; | |
58eb9381 | 1889 | struct relay_connection *conn; |
d3e2ba59 JD |
1890 | struct lttng_poll_event events; |
1891 | struct lttng_ht *relay_connections_ht; | |
d3e2ba59 JD |
1892 | struct lttng_ht_iter iter; |
1893 | struct lttng_viewer_cmd recv_hdr; | |
1894 | struct relay_local_data *relay_ctx = (struct relay_local_data *) data; | |
1895 | struct lttng_ht *sessions_ht = relay_ctx->sessions_ht; | |
d3e2ba59 JD |
1896 | |
1897 | DBG("[thread] Live viewer relay worker started"); | |
1898 | ||
1899 | rcu_register_thread(); | |
1900 | ||
eea7556c MD |
1901 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1902 | ||
9b5e0863 MD |
1903 | if (testpoint(relayd_thread_live_worker)) { |
1904 | goto error_testpoint; | |
1905 | } | |
1906 | ||
d3e2ba59 JD |
1907 | /* table of connections indexed on socket */ |
1908 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
1909 | if (!relay_connections_ht) { | |
1910 | goto relay_connections_ht_error; | |
1911 | } | |
1912 | ||
1913 | ret = create_thread_poll_set(&events, 2); | |
1914 | if (ret < 0) { | |
1915 | goto error_poll_create; | |
1916 | } | |
1917 | ||
58eb9381 | 1918 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1919 | if (ret < 0) { |
1920 | goto error; | |
1921 | } | |
1922 | ||
1923 | restart: | |
1924 | while (1) { | |
1925 | int i; | |
1926 | ||
eea7556c MD |
1927 | health_code_update(); |
1928 | ||
d3e2ba59 JD |
1929 | /* Infinite blocking call, waiting for transmission */ |
1930 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1931 | health_poll_entry(); |
d3e2ba59 | 1932 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1933 | health_poll_exit(); |
d3e2ba59 JD |
1934 | if (ret < 0) { |
1935 | /* | |
1936 | * Restart interrupted system call. | |
1937 | */ | |
1938 | if (errno == EINTR) { | |
1939 | goto restart; | |
1940 | } | |
1941 | goto error; | |
1942 | } | |
1943 | ||
1944 | nb_fd = ret; | |
1945 | ||
1946 | /* | |
1947 | * Process control. The control connection is prioritised so we don't | |
1948 | * starve it with high throughput tracing data on the data | |
1949 | * connection. | |
1950 | */ | |
1951 | for (i = 0; i < nb_fd; i++) { | |
1952 | /* Fetch once the poll data */ | |
1953 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1954 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1955 | ||
eea7556c MD |
1956 | health_code_update(); |
1957 | ||
e0077699 MD |
1958 | if (!revents) { |
1959 | /* No activity for this FD (poll implementation). */ | |
1960 | continue; | |
1961 | } | |
1962 | ||
d3e2ba59 | 1963 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 1964 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
1965 | if (ret) { |
1966 | err = 0; | |
1967 | goto exit; | |
1968 | } | |
1969 | ||
58eb9381 DG |
1970 | /* Inspect the relay conn pipe for new connection */ |
1971 | if (pollfd == live_conn_pipe[0]) { | |
d3e2ba59 JD |
1972 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1973 | ERR("Relay live pipe error"); | |
1974 | goto error; | |
1975 | } else if (revents & LPOLLIN) { | |
58eb9381 | 1976 | ret = lttng_read(live_conn_pipe[0], &conn, sizeof(conn)); |
d3e2ba59 JD |
1977 | if (ret < 0) { |
1978 | goto error; | |
1979 | } | |
58eb9381 DG |
1980 | conn->sessions_ht = sessions_ht; |
1981 | connection_init(conn); | |
1982 | lttng_poll_add(&events, conn->sock->fd, | |
1983 | LPOLLIN | LPOLLRDHUP); | |
1984 | rcu_read_lock(); | |
1985 | lttng_ht_add_unique_ulong(relay_connections_ht, | |
1986 | &conn->sock_n); | |
d3e2ba59 | 1987 | rcu_read_unlock(); |
58eb9381 | 1988 | DBG("Connection socket %d added", conn->sock->fd); |
d3e2ba59 | 1989 | } |
58eb9381 DG |
1990 | } else { |
1991 | rcu_read_lock(); | |
1992 | conn = connection_find_by_sock(relay_connections_ht, pollfd); | |
1993 | /* If not found, there is a synchronization issue. */ | |
1994 | assert(conn); | |
1995 | ||
1996 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1997 | cleanup_connection_pollfd(&events, pollfd); | |
1998 | destroy_connection(relay_connections_ht, conn); | |
d3e2ba59 | 1999 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
2000 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
2001 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 2002 | if (ret <= 0) { |
58eb9381 DG |
2003 | /* Connection closed */ |
2004 | cleanup_connection_pollfd(&events, pollfd); | |
2005 | destroy_connection(relay_connections_ht, conn); | |
2006 | DBG("Viewer control conn closed with %d", pollfd); | |
d3e2ba59 | 2007 | } else { |
58eb9381 | 2008 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
2009 | if (ret < 0) { |
2010 | /* Clear the session on error. */ | |
58eb9381 DG |
2011 | cleanup_connection_pollfd(&events, pollfd); |
2012 | destroy_connection(relay_connections_ht, conn); | |
d3e2ba59 JD |
2013 | DBG("Viewer connection closed with %d", pollfd); |
2014 | } | |
2015 | } | |
2016 | } | |
2017 | rcu_read_unlock(); | |
2018 | } | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | exit: | |
2023 | error: | |
2024 | lttng_poll_clean(&events); | |
2025 | ||
58eb9381 | 2026 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 2027 | rcu_read_lock(); |
58eb9381 DG |
2028 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, conn, |
2029 | sock_n.node) { | |
eea7556c | 2030 | health_code_update(); |
58eb9381 | 2031 | destroy_connection(relay_connections_ht, conn); |
d3e2ba59 JD |
2032 | } |
2033 | rcu_read_unlock(); | |
2034 | error_poll_create: | |
2035 | lttng_ht_destroy(relay_connections_ht); | |
2036 | relay_connections_ht_error: | |
58eb9381 DG |
2037 | /* Close relay conn pipes */ |
2038 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
2039 | if (err) { |
2040 | DBG("Viewer worker thread exited with error"); | |
2041 | } | |
2042 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2043 | error_testpoint: |
eea7556c MD |
2044 | if (err) { |
2045 | health_error(); | |
2046 | ERR("Health error occurred in %s", __func__); | |
2047 | } | |
2048 | health_unregister(health_relayd); | |
d3e2ba59 JD |
2049 | stop_threads(); |
2050 | rcu_unregister_thread(); | |
2051 | return NULL; | |
2052 | } | |
2053 | ||
2054 | /* | |
2055 | * Create the relay command pipe to wake thread_manage_apps. | |
2056 | * Closed in cleanup(). | |
2057 | */ | |
58eb9381 | 2058 | static int create_conn_pipe(void) |
d3e2ba59 JD |
2059 | { |
2060 | int ret; | |
2061 | ||
58eb9381 | 2062 | ret = utils_create_pipe_cloexec(live_conn_pipe); |
d3e2ba59 JD |
2063 | |
2064 | return ret; | |
2065 | } | |
2066 | ||
aaec7998 | 2067 | void live_stop_threads(void) |
d3e2ba59 JD |
2068 | { |
2069 | int ret; | |
2070 | void *status; | |
2071 | ||
2072 | stop_threads(); | |
2073 | ||
2074 | ret = pthread_join(live_listener_thread, &status); | |
2075 | if (ret != 0) { | |
2076 | PERROR("pthread_join live listener"); | |
2077 | goto error; /* join error, exit without cleanup */ | |
2078 | } | |
2079 | ||
2080 | ret = pthread_join(live_worker_thread, &status); | |
2081 | if (ret != 0) { | |
2082 | PERROR("pthread_join live worker"); | |
2083 | goto error; /* join error, exit without cleanup */ | |
2084 | } | |
2085 | ||
2086 | ret = pthread_join(live_dispatcher_thread, &status); | |
2087 | if (ret != 0) { | |
2088 | PERROR("pthread_join live dispatcher"); | |
2089 | goto error; /* join error, exit without cleanup */ | |
2090 | } | |
2091 | ||
2092 | cleanup(); | |
2093 | ||
2094 | error: | |
2095 | return; | |
2096 | } | |
2097 | ||
2098 | /* | |
2099 | * main | |
2100 | */ | |
2101 | int live_start_threads(struct lttng_uri *uri, | |
0b242f62 | 2102 | struct relay_local_data *relay_ctx) |
d3e2ba59 JD |
2103 | { |
2104 | int ret = 0; | |
2105 | void *status; | |
2106 | int is_root; | |
2107 | ||
2108 | assert(uri); | |
2109 | live_uri = uri; | |
2110 | ||
d3e2ba59 JD |
2111 | /* Check if daemon is UID = 0 */ |
2112 | is_root = !getuid(); | |
2113 | ||
2114 | if (!is_root) { | |
2115 | if (live_uri->port < 1024) { | |
2116 | ERR("Need to be root to use ports < 1024"); | |
2117 | ret = -1; | |
2118 | goto exit; | |
2119 | } | |
2120 | } | |
2121 | ||
2122 | /* Setup the thread apps communication pipe. */ | |
58eb9381 | 2123 | if ((ret = create_conn_pipe()) < 0) { |
d3e2ba59 JD |
2124 | goto exit; |
2125 | } | |
2126 | ||
2127 | /* Init relay command queue. */ | |
8bdee6e2 | 2128 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2129 | |
2130 | /* Set up max poll set size */ | |
2131 | lttng_poll_set_max_size(); | |
2132 | ||
2133 | /* Setup the dispatcher thread */ | |
2134 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2135 | thread_dispatcher, (void *) NULL); | |
2136 | if (ret != 0) { | |
2137 | PERROR("pthread_create viewer dispatcher"); | |
2138 | goto exit_dispatcher; | |
2139 | } | |
2140 | ||
2141 | /* Setup the worker thread */ | |
2142 | ret = pthread_create(&live_worker_thread, NULL, | |
2143 | thread_worker, relay_ctx); | |
2144 | if (ret != 0) { | |
2145 | PERROR("pthread_create viewer worker"); | |
2146 | goto exit_worker; | |
2147 | } | |
2148 | ||
2149 | /* Setup the listener thread */ | |
2150 | ret = pthread_create(&live_listener_thread, NULL, | |
2151 | thread_listener, (void *) NULL); | |
2152 | if (ret != 0) { | |
2153 | PERROR("pthread_create viewer listener"); | |
2154 | goto exit_listener; | |
2155 | } | |
2156 | ||
2157 | ret = 0; | |
2158 | goto end; | |
2159 | ||
2160 | exit_listener: | |
2161 | ret = pthread_join(live_listener_thread, &status); | |
2162 | if (ret != 0) { | |
2163 | PERROR("pthread_join live listener"); | |
2164 | goto error; /* join error, exit without cleanup */ | |
2165 | } | |
2166 | ||
2167 | exit_worker: | |
2168 | ret = pthread_join(live_worker_thread, &status); | |
2169 | if (ret != 0) { | |
2170 | PERROR("pthread_join live worker"); | |
2171 | goto error; /* join error, exit without cleanup */ | |
2172 | } | |
2173 | ||
2174 | exit_dispatcher: | |
2175 | ret = pthread_join(live_dispatcher_thread, &status); | |
2176 | if (ret != 0) { | |
2177 | PERROR("pthread_join live dispatcher"); | |
2178 | goto error; /* join error, exit without cleanup */ | |
2179 | } | |
2180 | ||
2181 | exit: | |
2182 | cleanup(); | |
2183 | ||
2184 | end: | |
2185 | error: | |
2186 | return ret; | |
2187 | } |