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> | |
5a693d30 | 4 | * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
d3e2ba59 JD |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | */ | |
19 | ||
20 | #define _GNU_SOURCE | |
6c1c0768 | 21 | #define _LGPL_SOURCE |
d3e2ba59 JD |
22 | #include <getopt.h> |
23 | #include <grp.h> | |
24 | #include <limits.h> | |
25 | #include <pthread.h> | |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #include <sys/mman.h> | |
31 | #include <sys/mount.h> | |
32 | #include <sys/resource.h> | |
33 | #include <sys/socket.h> | |
34 | #include <sys/stat.h> | |
35 | #include <sys/types.h> | |
36 | #include <sys/wait.h> | |
37 | #include <inttypes.h> | |
38 | #include <urcu/futex.h> | |
39 | #include <urcu/uatomic.h> | |
5a693d30 | 40 | #include <urcu/rculist.h> |
d3e2ba59 JD |
41 | #include <unistd.h> |
42 | #include <fcntl.h> | |
43 | #include <config.h> | |
44 | ||
45 | #include <lttng/lttng.h> | |
46 | #include <common/common.h> | |
47 | #include <common/compat/poll.h> | |
48 | #include <common/compat/socket.h> | |
f263b7fd | 49 | #include <common/compat/endian.h> |
d3e2ba59 JD |
50 | #include <common/defaults.h> |
51 | #include <common/futex.h> | |
2f8f53af | 52 | #include <common/index/index.h> |
d3e2ba59 JD |
53 | #include <common/sessiond-comm/sessiond-comm.h> |
54 | #include <common/sessiond-comm/inet.h> | |
55 | #include <common/sessiond-comm/relayd.h> | |
56 | #include <common/uri.h> | |
57 | #include <common/utils.h> | |
58 | ||
59 | #include "cmd.h" | |
60 | #include "live.h" | |
61 | #include "lttng-relayd.h" | |
d3e2ba59 | 62 | #include "utils.h" |
eea7556c | 63 | #include "health-relayd.h" |
9b5e0863 | 64 | #include "testpoint.h" |
2f8f53af | 65 | #include "viewer-stream.h" |
2a174661 DG |
66 | #include "stream.h" |
67 | #include "session.h" | |
68 | #include "ctf-trace.h" | |
58eb9381 | 69 | #include "connection.h" |
5a693d30 MD |
70 | #include "viewer-session.h" |
71 | ||
72 | #define SESSION_BUF_DEFAULT_COUNT 16 | |
d3e2ba59 JD |
73 | |
74 | static struct lttng_uri *live_uri; | |
75 | ||
d3e2ba59 JD |
76 | /* |
77 | * This pipe is used to inform the worker thread that a command is queued and | |
78 | * ready to be processed. | |
79 | */ | |
58eb9381 | 80 | static int live_conn_pipe[2] = { -1, -1 }; |
d3e2ba59 JD |
81 | |
82 | /* Shared between threads */ | |
83 | static int live_dispatch_thread_exit; | |
84 | ||
85 | static pthread_t live_listener_thread; | |
86 | static pthread_t live_dispatcher_thread; | |
87 | static pthread_t live_worker_thread; | |
88 | ||
89 | /* | |
90 | * Relay command queue. | |
91 | * | |
92 | * The live_thread_listener and live_thread_dispatcher communicate with this | |
93 | * queue. | |
94 | */ | |
58eb9381 | 95 | static struct relay_conn_queue viewer_conn_queue; |
d3e2ba59 JD |
96 | |
97 | static uint64_t last_relay_viewer_session_id; | |
5a693d30 MD |
98 | static pthread_mutex_t last_relay_viewer_session_id_lock = |
99 | PTHREAD_MUTEX_INITIALIZER; | |
d3e2ba59 JD |
100 | |
101 | /* | |
102 | * Cleanup the daemon | |
103 | */ | |
104 | static | |
178a0557 | 105 | void cleanup_relayd_live(void) |
d3e2ba59 JD |
106 | { |
107 | DBG("Cleaning up"); | |
108 | ||
d3e2ba59 JD |
109 | free(live_uri); |
110 | } | |
111 | ||
2f8f53af DG |
112 | /* |
113 | * Receive a request buffer using a given socket, destination allocated buffer | |
114 | * of length size. | |
115 | * | |
116 | * Return the size of the received message or else a negative value on error | |
117 | * with errno being set by recvmsg() syscall. | |
118 | */ | |
119 | static | |
120 | ssize_t recv_request(struct lttcomm_sock *sock, void *buf, size_t size) | |
121 | { | |
122 | ssize_t ret; | |
123 | ||
2f8f53af DG |
124 | ret = sock->ops->recvmsg(sock, buf, size, 0); |
125 | if (ret < 0 || ret != size) { | |
126 | if (ret == 0) { | |
127 | /* Orderly shutdown. Not necessary to print an error. */ | |
128 | DBG("Socket %d did an orderly shutdown", sock->fd); | |
129 | } else { | |
130 | ERR("Relay failed to receive request."); | |
131 | } | |
132 | ret = -1; | |
133 | } | |
134 | ||
135 | return ret; | |
136 | } | |
137 | ||
138 | /* | |
139 | * Send a response buffer using a given socket, source allocated buffer of | |
140 | * length size. | |
141 | * | |
142 | * Return the size of the sent message or else a negative value on error with | |
143 | * errno being set by sendmsg() syscall. | |
144 | */ | |
145 | static | |
146 | ssize_t send_response(struct lttcomm_sock *sock, void *buf, size_t size) | |
147 | { | |
148 | ssize_t ret; | |
149 | ||
2f8f53af DG |
150 | ret = sock->ops->sendmsg(sock, buf, size, 0); |
151 | if (ret < 0) { | |
152 | ERR("Relayd failed to send response."); | |
153 | } | |
154 | ||
155 | return ret; | |
156 | } | |
157 | ||
158 | /* | |
f04a971b JD |
159 | * Atomically check if new streams got added in one of the sessions attached |
160 | * and reset the flag to 0. | |
2f8f53af DG |
161 | * |
162 | * Returns 1 if new streams got added, 0 if nothing changed, a negative value | |
163 | * on error. | |
164 | */ | |
165 | static | |
f04a971b | 166 | int check_new_streams(struct relay_connection *conn) |
2f8f53af | 167 | { |
2f8f53af | 168 | struct relay_session *session; |
f04a971b JD |
169 | unsigned long current_val; |
170 | int ret = 0; | |
2f8f53af | 171 | |
f04a971b JD |
172 | if (!conn->viewer_session) { |
173 | goto end; | |
174 | } | |
5a693d30 MD |
175 | rcu_read_lock(); |
176 | cds_list_for_each_entry_rcu(session, | |
177 | &conn->viewer_session->session_list, | |
178 | viewer_session_node) { | |
179 | if (!session_get(session)) { | |
180 | continue; | |
181 | } | |
f04a971b JD |
182 | current_val = uatomic_cmpxchg(&session->new_streams, 1, 0); |
183 | ret = current_val; | |
5a693d30 | 184 | session_put(session); |
f04a971b JD |
185 | if (ret == 1) { |
186 | goto end; | |
187 | } | |
2f8f53af | 188 | } |
f04a971b | 189 | end: |
5a693d30 | 190 | rcu_read_unlock(); |
2f8f53af DG |
191 | return ret; |
192 | } | |
193 | ||
194 | /* | |
195 | * Send viewer streams to the given socket. The ignore_sent_flag indicates if | |
196 | * this function should ignore the sent flag or not. | |
197 | * | |
198 | * Return 0 on success or else a negative value. | |
199 | */ | |
200 | static | |
201 | ssize_t send_viewer_streams(struct lttcomm_sock *sock, | |
202 | struct relay_session *session, unsigned int ignore_sent_flag) | |
203 | { | |
204 | ssize_t ret; | |
205 | struct lttng_viewer_stream send_stream; | |
206 | struct lttng_ht_iter iter; | |
207 | struct relay_viewer_stream *vstream; | |
208 | ||
2f8f53af DG |
209 | rcu_read_lock(); |
210 | ||
211 | cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, vstream, | |
212 | stream_n.node) { | |
2a174661 DG |
213 | struct ctf_trace *ctf_trace; |
214 | ||
2f8f53af DG |
215 | health_code_update(); |
216 | ||
5a693d30 MD |
217 | if (!viewer_stream_get(vstream)) { |
218 | continue; | |
219 | } | |
220 | ||
221 | pthread_mutex_lock(&vstream->stream->lock); | |
2f8f53af | 222 | /* Ignore if not the same session. */ |
5a693d30 | 223 | if (vstream->stream->trace->session->id != session->id || |
2f8f53af | 224 | (!ignore_sent_flag && vstream->sent_flag)) { |
5a693d30 MD |
225 | pthread_mutex_unlock(&vstream->stream->lock); |
226 | viewer_stream_put(vstream); | |
2f8f53af DG |
227 | continue; |
228 | } | |
229 | ||
5a693d30 MD |
230 | ctf_trace = vstream->stream->trace; |
231 | send_stream.id = htobe64(vstream->stream->stream_handle); | |
2a174661 | 232 | send_stream.ctf_trace_id = htobe64(ctf_trace->id); |
5a693d30 MD |
233 | send_stream.metadata_flag = htobe32( |
234 | vstream->stream->is_metadata); | |
2f8f53af DG |
235 | strncpy(send_stream.path_name, vstream->path_name, |
236 | sizeof(send_stream.path_name)); | |
237 | strncpy(send_stream.channel_name, vstream->channel_name, | |
238 | sizeof(send_stream.channel_name)); | |
239 | ||
5a693d30 MD |
240 | DBG("Sending stream %" PRIu64 " to viewer", |
241 | vstream->stream->stream_handle); | |
242 | vstream->sent_flag = 1; | |
243 | pthread_mutex_unlock(&vstream->stream->lock); | |
244 | ||
2f8f53af | 245 | ret = send_response(sock, &send_stream, sizeof(send_stream)); |
5a693d30 | 246 | viewer_stream_put(vstream); |
2f8f53af DG |
247 | if (ret < 0) { |
248 | goto end_unlock; | |
249 | } | |
2f8f53af DG |
250 | } |
251 | ||
252 | ret = 0; | |
253 | ||
254 | end_unlock: | |
255 | rcu_read_unlock(); | |
256 | return ret; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Create every viewer stream possible for the given session with the seek | |
261 | * type. Three counters *can* be return which are in order the total amount of | |
262 | * viewer stream of the session, the number of unsent stream and the number of | |
263 | * stream created. Those counters can be NULL and thus will be ignored. | |
264 | * | |
265 | * Return 0 on success or else a negative value. | |
266 | */ | |
267 | static | |
268 | int make_viewer_streams(struct relay_session *session, | |
269 | enum lttng_viewer_seek seek_t, uint32_t *nb_total, uint32_t *nb_unsent, | |
270 | uint32_t *nb_created) | |
271 | { | |
272 | int ret; | |
2f8f53af | 273 | struct lttng_ht_iter iter; |
2a174661 | 274 | struct ctf_trace *ctf_trace; |
2f8f53af DG |
275 | |
276 | assert(session); | |
277 | ||
278 | /* | |
5a693d30 MD |
279 | * Hold the session lock to ensure that we see either none or |
280 | * all initial streams for a session, but no intermediate state. | |
2f8f53af | 281 | */ |
5a693d30 | 282 | pthread_mutex_lock(&session->lock); |
2f8f53af DG |
283 | |
284 | /* | |
5a693d30 MD |
285 | * Create viewer streams for relay streams that are ready to be |
286 | * used for a the given session id only. | |
2f8f53af | 287 | */ |
2a174661 DG |
288 | rcu_read_lock(); |
289 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
290 | node.node) { | |
291 | struct relay_stream *stream; | |
2f8f53af DG |
292 | |
293 | health_code_update(); | |
294 | ||
5a693d30 | 295 | if (!ctf_trace_get(ctf_trace)) { |
2f8f53af DG |
296 | continue; |
297 | } | |
298 | ||
5a693d30 | 299 | cds_list_for_each_entry_rcu(stream, &ctf_trace->stream_list, stream_node) { |
2a174661 DG |
300 | struct relay_viewer_stream *vstream; |
301 | ||
5a693d30 | 302 | if (!stream_get(stream)) { |
2a174661 DG |
303 | continue; |
304 | } | |
5a693d30 MD |
305 | /* |
306 | * stream published is protected by the session | |
307 | * lock. | |
308 | */ | |
309 | if (!stream->published) { | |
310 | goto next; | |
311 | } | |
312 | vstream = viewer_stream_get_by_id(stream->stream_handle); | |
2f8f53af | 313 | if (!vstream) { |
5a693d30 | 314 | vstream = viewer_stream_create(stream, seek_t); |
2a174661 DG |
315 | if (!vstream) { |
316 | ret = -1; | |
5a693d30 MD |
317 | ctf_trace_put(ctf_trace); |
318 | stream_put(stream); | |
2a174661 DG |
319 | goto error_unlock; |
320 | } | |
2a174661 DG |
321 | |
322 | if (nb_created) { | |
323 | /* Update number of created stream counter. */ | |
324 | (*nb_created)++; | |
325 | } | |
5a693d30 MD |
326 | } else { |
327 | if (!vstream->sent_flag && nb_unsent) { | |
328 | /* Update number of unsent stream counter. */ | |
329 | (*nb_unsent)++; | |
330 | } | |
331 | viewer_stream_put(vstream); | |
2f8f53af | 332 | } |
2a174661 DG |
333 | /* Update number of total stream counter. */ |
334 | if (nb_total) { | |
335 | (*nb_total)++; | |
2f8f53af | 336 | } |
5a693d30 MD |
337 | next: |
338 | stream_put(stream); | |
2f8f53af | 339 | } |
5a693d30 | 340 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
341 | } |
342 | ||
343 | ret = 0; | |
344 | ||
345 | error_unlock: | |
2a174661 | 346 | rcu_read_unlock(); |
5a693d30 | 347 | pthread_mutex_unlock(&session->lock); |
2f8f53af DG |
348 | return ret; |
349 | } | |
350 | ||
b4aacfdc | 351 | int relayd_live_stop(void) |
d3e2ba59 | 352 | { |
b4aacfdc | 353 | /* Stop dispatch thread */ |
d3e2ba59 | 354 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 355 | futex_nto1_wake(&viewer_conn_queue.futex); |
b4aacfdc | 356 | return 0; |
d3e2ba59 JD |
357 | } |
358 | ||
d3e2ba59 JD |
359 | /* |
360 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
361 | */ | |
362 | static | |
363 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
364 | { | |
365 | int ret; | |
366 | ||
367 | if (events == NULL || size == 0) { | |
368 | ret = -1; | |
369 | goto error; | |
370 | } | |
371 | ||
372 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
373 | if (ret < 0) { | |
374 | goto error; | |
375 | } | |
376 | ||
377 | /* Add quit pipe */ | |
bcf4a440 | 378 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
379 | if (ret < 0) { |
380 | goto error; | |
381 | } | |
382 | ||
383 | return 0; | |
384 | ||
385 | error: | |
386 | return ret; | |
387 | } | |
388 | ||
389 | /* | |
390 | * Check if the thread quit pipe was triggered. | |
391 | * | |
392 | * Return 1 if it was triggered else 0; | |
393 | */ | |
394 | static | |
bcf4a440 | 395 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 396 | { |
bcf4a440 | 397 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
398 | return 1; |
399 | } | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Create and init socket from uri. | |
406 | */ | |
407 | static | |
408 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
409 | { | |
410 | int ret; | |
411 | struct lttcomm_sock *sock = NULL; | |
412 | ||
413 | sock = lttcomm_alloc_sock_from_uri(uri); | |
414 | if (sock == NULL) { | |
415 | ERR("Allocating socket"); | |
416 | goto error; | |
417 | } | |
418 | ||
419 | ret = lttcomm_create_sock(sock); | |
420 | if (ret < 0) { | |
421 | goto error; | |
422 | } | |
423 | DBG("Listening on sock %d for live", sock->fd); | |
424 | ||
425 | ret = sock->ops->bind(sock); | |
426 | if (ret < 0) { | |
427 | goto error; | |
428 | } | |
429 | ||
430 | ret = sock->ops->listen(sock, -1); | |
431 | if (ret < 0) { | |
432 | goto error; | |
433 | ||
434 | } | |
435 | ||
436 | return sock; | |
437 | ||
438 | error: | |
439 | if (sock) { | |
440 | lttcomm_destroy_sock(sock); | |
441 | } | |
442 | return NULL; | |
443 | } | |
444 | ||
445 | /* | |
446 | * This thread manages the listening for new connections on the network | |
447 | */ | |
448 | static | |
449 | void *thread_listener(void *data) | |
450 | { | |
451 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
452 | uint32_t revents, nb_fd; |
453 | struct lttng_poll_event events; | |
454 | struct lttcomm_sock *live_control_sock; | |
455 | ||
456 | DBG("[thread] Relay live listener started"); | |
457 | ||
eea7556c MD |
458 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
459 | ||
460 | health_code_update(); | |
461 | ||
d3e2ba59 JD |
462 | live_control_sock = init_socket(live_uri); |
463 | if (!live_control_sock) { | |
464 | goto error_sock_control; | |
465 | } | |
466 | ||
fb4d42ab | 467 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
d3e2ba59 JD |
468 | ret = create_thread_poll_set(&events, 2); |
469 | if (ret < 0) { | |
470 | goto error_create_poll; | |
471 | } | |
472 | ||
473 | /* Add the control socket */ | |
474 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
475 | if (ret < 0) { | |
476 | goto error_poll_add; | |
477 | } | |
478 | ||
3fd27398 MD |
479 | lttng_relay_notify_ready(); |
480 | ||
9b5e0863 MD |
481 | if (testpoint(relayd_thread_live_listener)) { |
482 | goto error_testpoint; | |
483 | } | |
484 | ||
d3e2ba59 | 485 | while (1) { |
eea7556c MD |
486 | health_code_update(); |
487 | ||
d3e2ba59 JD |
488 | DBG("Listener accepting live viewers connections"); |
489 | ||
490 | restart: | |
eea7556c | 491 | health_poll_entry(); |
d3e2ba59 | 492 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 493 | health_poll_exit(); |
d3e2ba59 JD |
494 | if (ret < 0) { |
495 | /* | |
496 | * Restart interrupted system call. | |
497 | */ | |
498 | if (errno == EINTR) { | |
499 | goto restart; | |
500 | } | |
501 | goto error; | |
502 | } | |
503 | nb_fd = ret; | |
504 | ||
505 | DBG("Relay new viewer connection received"); | |
506 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
507 | health_code_update(); |
508 | ||
d3e2ba59 JD |
509 | /* Fetch once the poll data */ |
510 | revents = LTTNG_POLL_GETEV(&events, i); | |
511 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
512 | ||
fd20dac9 MD |
513 | if (!revents) { |
514 | /* No activity for this FD (poll implementation). */ | |
515 | continue; | |
516 | } | |
517 | ||
d3e2ba59 | 518 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 519 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
520 | if (ret) { |
521 | err = 0; | |
522 | goto exit; | |
523 | } | |
524 | ||
525 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
526 | ERR("socket poll error"); | |
527 | goto error; | |
528 | } else if (revents & LPOLLIN) { | |
529 | /* | |
5a693d30 MD |
530 | * A new connection is requested, therefore a |
531 | * viewer connection is allocated in this | |
532 | * thread, enqueued to a global queue and | |
533 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 534 | */ |
58eb9381 DG |
535 | int val = 1; |
536 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
537 | struct lttcomm_sock *newsock; |
538 | ||
d3e2ba59 JD |
539 | newsock = live_control_sock->ops->accept(live_control_sock); |
540 | if (!newsock) { | |
541 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
542 | goto error; |
543 | } | |
544 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 545 | |
d3e2ba59 | 546 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 547 | sizeof(val)); |
d3e2ba59 JD |
548 | if (ret < 0) { |
549 | PERROR("setsockopt inet"); | |
550 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
551 | goto error; |
552 | } | |
5a693d30 MD |
553 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
554 | if (!new_conn) { | |
555 | lttcomm_destroy_sock(newsock); | |
556 | goto error; | |
557 | } | |
558 | /* Ownership assumed by the connection. */ | |
559 | newsock = NULL; | |
d3e2ba59 | 560 | |
58eb9381 | 561 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
562 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
563 | &new_conn->qnode); | |
d3e2ba59 JD |
564 | |
565 | /* | |
5a693d30 MD |
566 | * Wake the dispatch queue futex. |
567 | * Implicit memory barrier with the | |
568 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 569 | */ |
58eb9381 | 570 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
571 | } |
572 | } | |
573 | } | |
574 | ||
575 | exit: | |
576 | error: | |
577 | error_poll_add: | |
9b5e0863 | 578 | error_testpoint: |
d3e2ba59 JD |
579 | lttng_poll_clean(&events); |
580 | error_create_poll: | |
581 | if (live_control_sock->fd >= 0) { | |
582 | ret = live_control_sock->ops->close(live_control_sock); | |
583 | if (ret) { | |
584 | PERROR("close"); | |
585 | } | |
586 | } | |
587 | lttcomm_destroy_sock(live_control_sock); | |
588 | error_sock_control: | |
589 | if (err) { | |
eea7556c | 590 | health_error(); |
d3e2ba59 JD |
591 | DBG("Live viewer listener thread exited with error"); |
592 | } | |
eea7556c | 593 | health_unregister(health_relayd); |
d3e2ba59 | 594 | DBG("Live viewer listener thread cleanup complete"); |
b4aacfdc MD |
595 | if (lttng_relay_stop_threads()) { |
596 | ERR("Error stopping threads"); | |
178a0557 | 597 | } |
d3e2ba59 JD |
598 | return NULL; |
599 | } | |
600 | ||
601 | /* | |
602 | * This thread manages the dispatching of the requests to worker threads | |
603 | */ | |
604 | static | |
605 | void *thread_dispatcher(void *data) | |
606 | { | |
6cd525e8 MD |
607 | int err = -1; |
608 | ssize_t ret; | |
8bdee6e2 | 609 | struct cds_wfcq_node *node; |
58eb9381 | 610 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
611 | |
612 | DBG("[thread] Live viewer relay dispatcher started"); | |
613 | ||
eea7556c MD |
614 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
615 | ||
9b5e0863 MD |
616 | if (testpoint(relayd_thread_live_dispatcher)) { |
617 | goto error_testpoint; | |
618 | } | |
619 | ||
eea7556c MD |
620 | health_code_update(); |
621 | ||
d3e2ba59 | 622 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
623 | health_code_update(); |
624 | ||
d3e2ba59 | 625 | /* Atomically prepare the queue futex */ |
58eb9381 | 626 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
627 | |
628 | do { | |
eea7556c MD |
629 | health_code_update(); |
630 | ||
d3e2ba59 | 631 | /* Dequeue commands */ |
8bdee6e2 SM |
632 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
633 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
634 | if (node == NULL) { |
635 | DBG("Woken up but nothing in the live-viewer " | |
636 | "relay command queue"); | |
637 | /* Continue thread execution */ | |
638 | break; | |
639 | } | |
58eb9381 | 640 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 641 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 642 | conn->sock->fd); |
d3e2ba59 JD |
643 | |
644 | /* | |
5a693d30 MD |
645 | * Inform worker thread of the new request. This |
646 | * call is blocking so we can be assured that | |
647 | * the data will be read at some point in time | |
648 | * or wait to the end of the world :) | |
d3e2ba59 | 649 | */ |
58eb9381 DG |
650 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
651 | if (ret < 0) { | |
652 | PERROR("write conn pipe"); | |
5a693d30 | 653 | connection_put(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 | 674 | DBG("Live viewer dispatch thread dying"); |
b4aacfdc MD |
675 | if (lttng_relay_stop_threads()) { |
676 | ERR("Error stopping threads"); | |
178a0557 | 677 | } |
d3e2ba59 JD |
678 | return NULL; |
679 | } | |
680 | ||
681 | /* | |
682 | * Establish connection with the viewer and check the versions. | |
683 | * | |
684 | * Return 0 on success or else negative value. | |
685 | */ | |
686 | static | |
58eb9381 | 687 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
688 | { |
689 | int ret; | |
690 | struct lttng_viewer_connect reply, msg; | |
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) { |
93b4787b | 738 | /* |
5a693d30 MD |
739 | * Increment outside of htobe64 macro, because the argument can |
740 | * be used more than once within the macro, and thus the | |
741 | * operation may be undefined. | |
93b4787b | 742 | */ |
5a693d30 | 743 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
93b4787b | 744 | last_relay_viewer_session_id++; |
5a693d30 | 745 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
93b4787b | 746 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 747 | } |
eea7556c MD |
748 | |
749 | health_code_update(); | |
750 | ||
58eb9381 | 751 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 752 | if (ret < 0) { |
2f8f53af | 753 | goto end; |
d3e2ba59 JD |
754 | } |
755 | ||
eea7556c MD |
756 | health_code_update(); |
757 | ||
58eb9381 | 758 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
759 | ret = 0; |
760 | ||
761 | end: | |
762 | return ret; | |
763 | } | |
764 | ||
765 | /* | |
766 | * Send the viewer the list of current sessions. | |
5a693d30 MD |
767 | * We need to create a copy of the hash table content because otherwise |
768 | * we cannot assume the number of entries stays the same between getting | |
769 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
770 | * |
771 | * Return 0 on success or else a negative value. | |
772 | */ | |
773 | static | |
58eb9381 | 774 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
775 | { |
776 | int ret; | |
777 | struct lttng_viewer_list_sessions session_list; | |
d3e2ba59 | 778 | struct lttng_ht_iter iter; |
d3e2ba59 | 779 | struct relay_session *session; |
5a693d30 MD |
780 | struct lttng_viewer_session *send_session_buf = NULL; |
781 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
782 | uint32_t count = 0; | |
d3e2ba59 JD |
783 | |
784 | DBG("List sessions received"); | |
785 | ||
5a693d30 MD |
786 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
787 | if (!send_session_buf) { | |
788 | return -1; | |
d3e2ba59 JD |
789 | } |
790 | ||
5a693d30 MD |
791 | rcu_read_lock(); |
792 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 793 | session_n.node) { |
5a693d30 | 794 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 795 | |
eea7556c MD |
796 | health_code_update(); |
797 | ||
5a693d30 MD |
798 | if (count >= buf_count) { |
799 | struct lttng_viewer_session *newbuf; | |
800 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 801 | |
5a693d30 MD |
802 | newbuf = realloc(send_session_buf, |
803 | new_buf_count * sizeof(*send_session_buf)); | |
804 | if (!newbuf) { | |
805 | ret = -1; | |
806 | rcu_read_unlock(); | |
807 | goto end_free; | |
808 | } | |
809 | send_session_buf = newbuf; | |
810 | buf_count = new_buf_count; | |
6763619c | 811 | } |
5a693d30 MD |
812 | send_session = &send_session_buf[count]; |
813 | strncpy(send_session->session_name, session->session_name, | |
814 | sizeof(send_session->session_name)); | |
815 | strncpy(send_session->hostname, session->hostname, | |
816 | sizeof(send_session->hostname)); | |
817 | send_session->id = htobe64(session->id); | |
818 | send_session->live_timer = htobe32(session->live_timer); | |
819 | if (session->viewer_attached) { | |
820 | send_session->clients = htobe32(1); | |
821 | } else { | |
822 | send_session->clients = htobe32(0); | |
d227d5bd | 823 | } |
5a693d30 MD |
824 | send_session->streams = htobe32(session->stream_count); |
825 | count++; | |
826 | } | |
827 | rcu_read_unlock(); | |
d227d5bd | 828 | |
5a693d30 | 829 | session_list.sessions_count = htobe32(count); |
d227d5bd | 830 | |
5a693d30 | 831 | health_code_update(); |
d227d5bd | 832 | |
5a693d30 MD |
833 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
834 | if (ret < 0) { | |
835 | goto end_free; | |
d227d5bd | 836 | } |
d227d5bd | 837 | |
5a693d30 | 838 | health_code_update(); |
d227d5bd | 839 | |
5a693d30 MD |
840 | ret = send_response(conn->sock, send_session_buf, |
841 | count * sizeof(*send_session_buf)); | |
842 | if (ret < 0) { | |
843 | goto end_free; | |
d227d5bd | 844 | } |
5a693d30 | 845 | health_code_update(); |
d227d5bd | 846 | |
5a693d30 MD |
847 | ret = 0; |
848 | end_free: | |
849 | free(send_session_buf); | |
850 | return ret; | |
d227d5bd JD |
851 | } |
852 | ||
80e8027a | 853 | /* |
5a693d30 | 854 | * Send the viewer the list of current streams. |
80e8027a JD |
855 | */ |
856 | static | |
58eb9381 | 857 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
858 | { |
859 | int ret, send_streams = 0; | |
5a693d30 | 860 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
861 | struct lttng_viewer_new_streams_request request; |
862 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 863 | struct relay_session *session; |
6763619c | 864 | uint64_t session_id; |
80e8027a | 865 | |
58eb9381 | 866 | assert(conn); |
80e8027a JD |
867 | |
868 | DBG("Get new streams received"); | |
869 | ||
80e8027a JD |
870 | health_code_update(); |
871 | ||
2f8f53af | 872 | /* Receive the request from the connected client. */ |
58eb9381 | 873 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 874 | if (ret < 0) { |
80e8027a JD |
875 | goto error; |
876 | } | |
6763619c | 877 | session_id = be64toh(request.session_id); |
80e8027a JD |
878 | |
879 | health_code_update(); | |
880 | ||
53efb85a MD |
881 | memset(&response, 0, sizeof(response)); |
882 | ||
5a693d30 | 883 | session = session_get_by_id(session_id); |
2f8f53af | 884 | if (!session) { |
6763619c | 885 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 886 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
887 | goto send_reply; |
888 | } | |
889 | ||
5a693d30 | 890 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
80e8027a | 891 | send_streams = 0; |
c4e361a4 | 892 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
893 | goto send_reply; |
894 | } | |
895 | ||
6763619c JD |
896 | send_streams = 1; |
897 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
898 | ||
5a693d30 | 899 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
2f8f53af DG |
900 | &nb_created); |
901 | if (ret < 0) { | |
5a693d30 | 902 | goto end_put_session; |
2f8f53af DG |
903 | } |
904 | /* Only send back the newly created streams with the unsent ones. */ | |
905 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
906 | response.streams_count = htobe32(nb_streams); |
907 | ||
4479f682 JD |
908 | /* |
909 | * If the session is closed and we have no new streams to send, | |
910 | * it means that the viewer has already received the whole trace | |
911 | * for this session and should now close it. | |
912 | */ | |
5a693d30 | 913 | if (nb_total == 0 && session->connection_closed) { |
4479f682 JD |
914 | send_streams = 0; |
915 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
916 | goto send_reply; | |
917 | } | |
918 | ||
80e8027a JD |
919 | send_reply: |
920 | health_code_update(); | |
58eb9381 | 921 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 922 | if (ret < 0) { |
5a693d30 | 923 | goto end_put_session; |
80e8027a JD |
924 | } |
925 | health_code_update(); | |
926 | ||
927 | /* | |
5a693d30 MD |
928 | * Unknown or empty session, just return gracefully, the viewer |
929 | * knows what is happening. | |
80e8027a JD |
930 | */ |
931 | if (!send_streams || !nb_streams) { | |
932 | ret = 0; | |
5a693d30 | 933 | goto end_put_session; |
80e8027a JD |
934 | } |
935 | ||
2f8f53af | 936 | /* |
5a693d30 MD |
937 | * Send stream and *DON'T* ignore the sent flag so every viewer |
938 | * streams that were not sent from that point will be sent to | |
939 | * the viewer. | |
2f8f53af | 940 | */ |
58eb9381 | 941 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af | 942 | if (ret < 0) { |
5a693d30 | 943 | goto end_put_session; |
80e8027a JD |
944 | } |
945 | ||
5a693d30 MD |
946 | end_put_session: |
947 | if (session) { | |
948 | session_put(session); | |
949 | } | |
80e8027a JD |
950 | error: |
951 | return ret; | |
952 | } | |
953 | ||
d3e2ba59 JD |
954 | /* |
955 | * Send the viewer the list of current sessions. | |
956 | */ | |
957 | static | |
58eb9381 | 958 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 959 | { |
2f8f53af DG |
960 | int send_streams = 0; |
961 | ssize_t ret; | |
80e8027a | 962 | uint32_t nb_streams = 0; |
2f8f53af | 963 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
964 | struct lttng_viewer_attach_session_request request; |
965 | struct lttng_viewer_attach_session_response response; | |
5a693d30 | 966 | struct relay_session *session = NULL; |
d3e2ba59 | 967 | |
58eb9381 | 968 | assert(conn); |
d3e2ba59 | 969 | |
eea7556c MD |
970 | health_code_update(); |
971 | ||
2f8f53af | 972 | /* Receive the request from the connected client. */ |
58eb9381 | 973 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 974 | if (ret < 0) { |
d3e2ba59 JD |
975 | goto error; |
976 | } | |
977 | ||
eea7556c MD |
978 | health_code_update(); |
979 | ||
53efb85a MD |
980 | memset(&response, 0, sizeof(response)); |
981 | ||
c3b7390b JD |
982 | if (!conn->viewer_session) { |
983 | DBG("Client trying to attach before creating a live viewer session"); | |
984 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
985 | goto send_reply; | |
986 | } | |
987 | ||
5a693d30 | 988 | session = session_get_by_id(be64toh(request.session_id)); |
2f8f53af | 989 | if (!session) { |
d3e2ba59 JD |
990 | DBG("Relay session %" PRIu64 " not found", |
991 | be64toh(request.session_id)); | |
c4e361a4 | 992 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
993 | goto send_reply; |
994 | } | |
5a693d30 MD |
995 | DBG("Attach session ID %" PRIu64 " received", |
996 | be64toh(request.session_id)); | |
d3e2ba59 | 997 | |
5a693d30 | 998 | if (session->live_timer == 0) { |
d3e2ba59 | 999 | DBG("Not live session"); |
c4e361a4 | 1000 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1001 | goto send_reply; |
5a693d30 MD |
1002 | } |
1003 | ||
1004 | send_streams = 1; | |
1005 | ret = viewer_session_attach(conn->viewer_session, session); | |
1006 | if (ret) { | |
1007 | DBG("Already a viewer attached"); | |
1008 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); | |
1009 | goto send_reply; | |
d3e2ba59 JD |
1010 | } |
1011 | ||
1012 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1013 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1014 | case LTTNG_VIEWER_SEEK_LAST: | |
5a693d30 | 1015 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1016 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1017 | break; |
1018 | default: | |
1019 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1020 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1021 | send_streams = 0; |
1022 | goto send_reply; | |
1023 | } | |
1024 | ||
2f8f53af DG |
1025 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, NULL); |
1026 | if (ret < 0) { | |
5a693d30 | 1027 | goto end_put_session; |
d3e2ba59 | 1028 | } |
2f8f53af | 1029 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 JD |
1030 | |
1031 | send_reply: | |
eea7556c | 1032 | health_code_update(); |
58eb9381 | 1033 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1034 | if (ret < 0) { |
5a693d30 | 1035 | goto end_put_session; |
d3e2ba59 | 1036 | } |
eea7556c | 1037 | health_code_update(); |
d3e2ba59 JD |
1038 | |
1039 | /* | |
5a693d30 MD |
1040 | * Unknown or empty session, just return gracefully, the viewer |
1041 | * knows what is happening. | |
d3e2ba59 | 1042 | */ |
157df586 | 1043 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1044 | ret = 0; |
5a693d30 | 1045 | goto end_put_session; |
d3e2ba59 JD |
1046 | } |
1047 | ||
2f8f53af | 1048 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1049 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af | 1050 | if (ret < 0) { |
5a693d30 | 1051 | goto end_put_session; |
d3e2ba59 | 1052 | } |
d3e2ba59 | 1053 | |
5a693d30 MD |
1054 | end_put_session: |
1055 | if (session) { | |
1056 | session_put(session); | |
1057 | } | |
4a9daf17 JD |
1058 | error: |
1059 | return ret; | |
1060 | } | |
1061 | ||
878c34cf DG |
1062 | /* |
1063 | * Open the index file if needed for the given vstream. | |
1064 | * | |
5a693d30 MD |
1065 | * If an index file is successfully opened, the vstream index_fd set with |
1066 | * it. | |
878c34cf DG |
1067 | * |
1068 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
5a693d30 MD |
1069 | * |
1070 | * Called with rstream lock held. | |
878c34cf DG |
1071 | */ |
1072 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1073 | struct relay_stream *rstream) | |
1074 | { | |
1075 | int ret = 0; | |
1076 | ||
5a693d30 | 1077 | if (vstream->index_fd) { |
878c34cf DG |
1078 | goto end; |
1079 | } | |
1080 | ||
1081 | /* | |
5a693d30 | 1082 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1083 | */ |
5a693d30 | 1084 | if (rstream->total_index_received == 0) { |
878c34cf DG |
1085 | ret = -ENOENT; |
1086 | goto end; | |
1087 | } | |
1088 | ret = index_open(vstream->path_name, vstream->channel_name, | |
5a693d30 MD |
1089 | vstream->stream->tracefile_count, |
1090 | vstream->current_tracefile_id); | |
878c34cf | 1091 | if (ret >= 0) { |
5a693d30 MD |
1092 | vstream->index_fd = stream_fd_create(ret); |
1093 | if (!vstream->index_fd) { | |
1094 | if (close(ret)) { | |
1095 | PERROR("close"); | |
1096 | } | |
1097 | ret = -1; | |
1098 | } else { | |
1099 | ret = 0; | |
1100 | } | |
878c34cf DG |
1101 | goto end; |
1102 | } | |
1103 | ||
1104 | end: | |
1105 | return ret; | |
1106 | } | |
1107 | ||
1108 | /* | |
5a693d30 MD |
1109 | * Check the status of the index for the given stream. This function |
1110 | * updates the index structure if needed and can put (close) the vstream | |
1111 | * in the HUP situation. | |
1112 | * | |
1113 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1114 | * that the index has been updated and is ready to be sent to the | |
1115 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1116 | * |
5a693d30 | 1117 | * Called with rstream lock held. |
878c34cf DG |
1118 | */ |
1119 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1120 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1121 | struct lttng_viewer_index *index) | |
1122 | { | |
1123 | int ret; | |
1124 | ||
5a693d30 MD |
1125 | if (trace->session->connection_closed |
1126 | && rstream->total_index_received | |
1127 | == vstream->last_sent_index) { | |
1128 | /* Last index sent and session connection is closed. */ | |
1129 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1130 | goto hup; | |
1131 | } else if (rstream->beacon_ts_end != -1ULL && | |
1132 | rstream->total_index_received | |
1133 | == vstream->last_sent_index) { | |
1134 | /* | |
1135 | * We've received a synchronization beacon and the last index | |
1136 | * available has been sent, the index for now is inactive. | |
1137 | * | |
1138 | * In this case, we have received a beacon which allows us to | |
1139 | * inform the client of a time interval during which we can | |
1140 | * guarantee that there are no events to read (and never will | |
1141 | * be). | |
1142 | */ | |
1143 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1144 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1145 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
1146 | goto index_ready; | |
1147 | } else if (rstream->total_index_received <= vstream->last_sent_index) { | |
1148 | /* | |
1149 | * This actually checks the case where recv == last_sent. | |
1150 | * In this case, we have not received a beacon. Therefore, we | |
1151 | * can only ask the client to retry later. | |
1152 | */ | |
1153 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1154 | goto index_ready; | |
1155 | } else if (!viewer_stream_is_tracefile_seq_readable(vstream, | |
1156 | vstream->current_tracefile_seq)) { | |
1157 | /* | |
1158 | * The producer has overwritten our current file. We | |
1159 | * need to rotate. | |
1160 | */ | |
1161 | DBG("Viewer stream %" PRIu64 " rotation due to overwrite", | |
1162 | vstream->stream->stream_handle); | |
1163 | ret = viewer_stream_rotate(vstream); | |
1164 | if (ret < 0) { | |
1165 | goto end; | |
1166 | } else if (ret == 1) { | |
1167 | /* EOF across entire stream. */ | |
1168 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1169 | goto hup; | |
1170 | } | |
1171 | assert(viewer_stream_is_tracefile_seq_readable(vstream, | |
1172 | vstream->current_tracefile_seq)); | |
1173 | /* ret == 0 means successful so we continue. */ | |
1174 | ret = 0; | |
1175 | } else { | |
1176 | ssize_t read_ret; | |
1177 | char tmp[1]; | |
1178 | ||
1179 | /* | |
1180 | * Use EOF on current index file to find out when we | |
1181 | * need to rotate. | |
1182 | */ | |
1183 | read_ret = lttng_read(vstream->index_fd->fd, tmp, 1); | |
1184 | if (read_ret == 1) { | |
1185 | off_t seek_ret; | |
1186 | ||
1187 | /* There is still data to read. Rewind position. */ | |
1188 | seek_ret = lseek(vstream->index_fd->fd, -1, SEEK_CUR); | |
1189 | if (seek_ret < 0) { | |
1190 | ret = -1; | |
1191 | goto end; | |
1192 | } | |
1193 | ret = 0; | |
1194 | } else if (read_ret == 0) { | |
1195 | /* EOF. We need to rotate. */ | |
1196 | DBG("Viewer stream %" PRIu64 " rotation due to EOF", | |
1197 | vstream->stream->stream_handle); | |
1198 | ret = viewer_stream_rotate(vstream); | |
878c34cf | 1199 | if (ret < 0) { |
5a693d30 | 1200 | goto end; |
878c34cf | 1201 | } else if (ret == 1) { |
5a693d30 | 1202 | /* EOF across entire stream. */ |
878c34cf DG |
1203 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
1204 | goto hup; | |
1205 | } | |
5a693d30 MD |
1206 | assert(viewer_stream_is_tracefile_seq_readable(vstream, |
1207 | vstream->current_tracefile_seq)); | |
878c34cf | 1208 | /* ret == 0 means successful so we continue. */ |
5a693d30 MD |
1209 | ret = 0; |
1210 | } else { | |
1211 | /* Error reading index. */ | |
1212 | ret = -1; | |
878c34cf | 1213 | } |
878c34cf | 1214 | } |
5a693d30 | 1215 | end: |
878c34cf DG |
1216 | return ret; |
1217 | ||
1218 | hup: | |
5a693d30 | 1219 | viewer_stream_put(vstream); |
878c34cf DG |
1220 | index_ready: |
1221 | return 1; | |
1222 | } | |
1223 | ||
d3e2ba59 JD |
1224 | /* |
1225 | * Send the next index for a stream. | |
1226 | * | |
1227 | * Return 0 on success or else a negative value. | |
1228 | */ | |
1229 | static | |
58eb9381 | 1230 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1231 | { |
1232 | int ret; | |
878c34cf | 1233 | ssize_t read_ret; |
d3e2ba59 JD |
1234 | struct lttng_viewer_get_next_index request_index; |
1235 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1236 | struct ctf_packet_index packet_index; |
5a693d30 MD |
1237 | struct relay_viewer_stream *vstream = NULL; |
1238 | struct relay_stream *rstream = NULL; | |
1239 | struct ctf_trace *ctf_trace = NULL; | |
1240 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1241 | |
58eb9381 | 1242 | assert(conn); |
d3e2ba59 JD |
1243 | |
1244 | DBG("Viewer get next index"); | |
1245 | ||
5a693d30 | 1246 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1247 | health_code_update(); |
2f8f53af | 1248 | |
58eb9381 | 1249 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1250 | if (ret < 0) { |
d3e2ba59 JD |
1251 | goto end; |
1252 | } | |
eea7556c | 1253 | health_code_update(); |
d3e2ba59 | 1254 | |
5a693d30 | 1255 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1256 | if (!vstream) { |
2a174661 | 1257 | ret = -1; |
5a693d30 | 1258 | goto end; |
2a174661 DG |
1259 | } |
1260 | ||
5a693d30 MD |
1261 | /* Use back. ref. Protected by refcounts. */ |
1262 | rstream = vstream->stream; | |
1263 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1264 | |
5a693d30 MD |
1265 | /* metadata_viewer_stream may be NULL. */ |
1266 | metadata_viewer_stream = | |
1267 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1268 | |
5a693d30 | 1269 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1270 | |
1271 | /* | |
1272 | * The viewer should not ask for index on metadata stream. | |
1273 | */ | |
5a693d30 | 1274 | if (rstream->is_metadata) { |
c4e361a4 | 1275 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1276 | goto send_reply; |
1277 | } | |
1278 | ||
878c34cf DG |
1279 | /* Try to open an index if one is needed for that stream. */ |
1280 | ret = try_open_index(vstream, rstream); | |
1281 | if (ret < 0) { | |
0e6830aa | 1282 | if (ret == -ENOENT) { |
d3e2ba59 | 1283 | /* |
5a693d30 MD |
1284 | * The index is created only when the first data |
1285 | * packet arrives, it might not be ready at the | |
1286 | * beginning of the session | |
d3e2ba59 | 1287 | */ |
c4e361a4 | 1288 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1289 | } else { |
1290 | /* Unhandled error. */ | |
c4e361a4 | 1291 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1292 | } |
878c34cf | 1293 | goto send_reply; |
d3e2ba59 JD |
1294 | } |
1295 | ||
878c34cf | 1296 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1297 | if (ret < 0) { |
5a693d30 | 1298 | goto error_put; |
878c34cf DG |
1299 | } else if (ret == 1) { |
1300 | /* | |
5a693d30 MD |
1301 | * We have no index to send and check_index_status has populated |
1302 | * viewer_index's status. | |
878c34cf | 1303 | */ |
d3e2ba59 JD |
1304 | goto send_reply; |
1305 | } | |
5a693d30 | 1306 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1307 | assert(!ret); |
d3e2ba59 | 1308 | |
5a693d30 MD |
1309 | /* |
1310 | * vstream->stream_fd may be NULL if it has been closed by | |
1311 | * tracefile rotation, or if we are at the beginning of the | |
1312 | * stream. We open the data stream file here to protect against | |
1313 | * overwrite caused by tracefile rotation (in association with | |
1314 | * unlink performed before overwrite). | |
1315 | */ | |
1316 | if (!vstream->stream_fd) { | |
1317 | char fullpath[PATH_MAX]; | |
1318 | ||
1319 | if (vstream->stream->tracefile_count > 0) { | |
1320 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, | |
1321 | vstream->path_name, | |
1322 | vstream->channel_name, | |
1323 | vstream->current_tracefile_id); | |
1324 | } else { | |
1325 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", | |
1326 | vstream->path_name, | |
1327 | vstream->channel_name); | |
1328 | } | |
1329 | if (ret < 0) { | |
1330 | goto error_put; | |
1331 | } | |
1332 | ret = open(fullpath, O_RDONLY); | |
1333 | if (ret < 0) { | |
1334 | PERROR("Relay opening trace file"); | |
1335 | goto error_put; | |
1336 | } | |
1337 | vstream->stream_fd = stream_fd_create(ret); | |
1338 | if (!vstream->stream_fd) { | |
1339 | if (close(ret)) { | |
1340 | PERROR("close"); | |
1341 | } | |
1342 | goto error_put; | |
1343 | } | |
d3e2ba59 JD |
1344 | } |
1345 | ||
f04a971b | 1346 | ret = check_new_streams(conn); |
4a9daf17 | 1347 | if (ret < 0) { |
5a693d30 MD |
1348 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1349 | goto send_reply; | |
4a9daf17 JD |
1350 | } else if (ret == 1) { |
1351 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1352 | } | |
1353 | ||
5a693d30 | 1354 | read_ret = lttng_read(vstream->index_fd->fd, &packet_index, |
6cd525e8 | 1355 | sizeof(packet_index)); |
5a693d30 MD |
1356 | if (read_ret < sizeof(packet_index)) { |
1357 | ERR("Relay reading index file %d returned %zd", | |
1358 | vstream->index_fd->fd, read_ret); | |
1359 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
6b6b9a5a | 1360 | goto send_reply; |
d3e2ba59 | 1361 | } else { |
c4e361a4 | 1362 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
d3e2ba59 JD |
1363 | vstream->last_sent_index++; |
1364 | } | |
1365 | ||
1366 | /* | |
1367 | * Indexes are stored in big endian, no need to switch before sending. | |
1368 | */ | |
5a693d30 MD |
1369 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1370 | rstream->stream_handle, | |
1371 | be64toh(packet_index.offset)); | |
d3e2ba59 JD |
1372 | viewer_index.offset = packet_index.offset; |
1373 | viewer_index.packet_size = packet_index.packet_size; | |
1374 | viewer_index.content_size = packet_index.content_size; | |
1375 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1376 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1377 | viewer_index.events_discarded = packet_index.events_discarded; | |
1378 | viewer_index.stream_id = packet_index.stream_id; | |
1379 | ||
1380 | send_reply: | |
5a693d30 MD |
1381 | pthread_mutex_unlock(&rstream->lock); |
1382 | ||
1383 | if (metadata_viewer_stream) { | |
1384 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1385 | DBG("get next index metadata check: recv %" PRIu64 | |
1386 | " sent %" PRIu64, | |
1387 | metadata_viewer_stream->stream->metadata_received, | |
1388 | metadata_viewer_stream->metadata_sent); | |
1389 | if (!metadata_viewer_stream->stream->metadata_received || | |
1390 | metadata_viewer_stream->stream->metadata_received > | |
1391 | metadata_viewer_stream->metadata_sent) { | |
1392 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1393 | } | |
1394 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1395 | } | |
1396 | ||
d3e2ba59 | 1397 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1398 | health_code_update(); |
2f8f53af | 1399 | |
58eb9381 | 1400 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1401 | if (ret < 0) { |
5a693d30 | 1402 | goto end; |
d3e2ba59 | 1403 | } |
eea7556c | 1404 | health_code_update(); |
d3e2ba59 | 1405 | |
2f8f53af | 1406 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", |
5a693d30 MD |
1407 | vstream->last_sent_index, |
1408 | vstream->stream->stream_handle); | |
d3e2ba59 | 1409 | end: |
5a693d30 MD |
1410 | if (metadata_viewer_stream) { |
1411 | viewer_stream_put(metadata_viewer_stream); | |
1412 | } | |
1413 | if (vstream) { | |
1414 | viewer_stream_put(vstream); | |
1415 | } | |
1416 | return ret; | |
1417 | ||
1418 | error_put: | |
1419 | pthread_mutex_unlock(&rstream->lock); | |
1420 | if (metadata_viewer_stream) { | |
1421 | viewer_stream_put(metadata_viewer_stream); | |
1422 | } | |
1423 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1424 | return ret; |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Send the next index for a stream | |
1429 | * | |
1430 | * Return 0 on success or else a negative value. | |
1431 | */ | |
1432 | static | |
58eb9381 | 1433 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1434 | { |
1435 | int ret, send_data = 0; | |
1436 | char *data = NULL; | |
1437 | uint32_t len = 0; | |
1438 | ssize_t read_len; | |
1439 | struct lttng_viewer_get_packet get_packet_info; | |
1440 | struct lttng_viewer_trace_packet reply; | |
5a693d30 | 1441 | struct relay_viewer_stream *vstream = NULL; |
2a174661 | 1442 | struct ctf_trace *ctf_trace; |
5a693d30 | 1443 | struct relay_viewer_stream *metadata_viewer_stream = NULL; |
d3e2ba59 JD |
1444 | |
1445 | DBG2("Relay get data packet"); | |
1446 | ||
eea7556c | 1447 | health_code_update(); |
2f8f53af | 1448 | |
5a693d30 MD |
1449 | ret = recv_request(conn->sock, &get_packet_info, |
1450 | sizeof(get_packet_info)); | |
2f8f53af | 1451 | if (ret < 0) { |
d3e2ba59 JD |
1452 | goto end; |
1453 | } | |
eea7556c | 1454 | health_code_update(); |
d3e2ba59 | 1455 | |
0233a6a5 DG |
1456 | /* From this point on, the error label can be reached. */ |
1457 | memset(&reply, 0, sizeof(reply)); | |
1458 | ||
5a693d30 MD |
1459 | vstream = viewer_stream_get_by_id(be64toh(get_packet_info.stream_id)); |
1460 | if (!vstream) { | |
d3e2ba59 JD |
1461 | goto error; |
1462 | } | |
2a174661 | 1463 | |
5a693d30 | 1464 | ctf_trace = vstream->stream->trace; |
6763619c | 1465 | |
5a693d30 MD |
1466 | /* metadata_viewer_stream may be NULL. */ |
1467 | metadata_viewer_stream = | |
1468 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
d3e2ba59 | 1469 | |
5a693d30 MD |
1470 | if (metadata_viewer_stream) { |
1471 | bool get_packet_err = false; | |
d3e2ba59 | 1472 | |
5a693d30 MD |
1473 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); |
1474 | DBG("get packet metadata check: recv %" PRIu64 " sent %" PRIu64, | |
1475 | metadata_viewer_stream->stream->metadata_received, | |
1476 | metadata_viewer_stream->metadata_sent); | |
1477 | if (!metadata_viewer_stream->stream->metadata_received || | |
1478 | metadata_viewer_stream->stream->metadata_received > | |
1479 | metadata_viewer_stream->metadata_sent) { | |
1480 | /* | |
1481 | * We prevent the client from reading a data stream as | |
1482 | * long as there is metadata left to consume. This | |
1483 | * ensures that the client won't receive data of which | |
1484 | * it can't make sense. | |
1485 | */ | |
1486 | get_packet_err = true; | |
d3e2ba59 | 1487 | } |
5a693d30 MD |
1488 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); |
1489 | viewer_stream_put(metadata_viewer_stream); | |
1490 | if (get_packet_err) { | |
1491 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); | |
1492 | reply.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1493 | goto send_reply_nolock; | |
d3e2ba59 | 1494 | } |
d3e2ba59 JD |
1495 | } |
1496 | ||
5a693d30 MD |
1497 | pthread_mutex_lock(&vstream->stream->lock); |
1498 | /* | |
1499 | * The vstream->stream_fd used here has been opened by | |
1500 | * get_next_index. It is opened there because this is what | |
1501 | * allows us to grab a reference to the file with stream lock | |
1502 | * held, thus protecting us against overwrite caused by | |
1503 | * tracefile rotation. Since tracefile rotation unlinks the old | |
1504 | * data file, we are ensured that we won't have our data | |
1505 | * overwritten under us. | |
1506 | */ | |
f04a971b | 1507 | ret = check_new_streams(conn); |
4a9daf17 | 1508 | if (ret < 0) { |
5a693d30 | 1509 | goto end_free; |
4a9daf17 | 1510 | } else if (ret == 1) { |
c4e361a4 | 1511 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
4a9daf17 JD |
1512 | reply.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; |
1513 | goto send_reply; | |
1514 | } | |
1515 | ||
d3e2ba59 JD |
1516 | len = be32toh(get_packet_info.len); |
1517 | data = zmalloc(len); | |
1518 | if (!data) { | |
1519 | PERROR("relay data zmalloc"); | |
1520 | goto error; | |
1521 | } | |
1522 | ||
5a693d30 MD |
1523 | ret = lseek(vstream->stream_fd->fd, be64toh(get_packet_info.offset), |
1524 | SEEK_SET); | |
d3e2ba59 | 1525 | if (ret < 0) { |
5a693d30 MD |
1526 | PERROR("lseek fd %d to offset %" PRIu64, vstream->stream_fd->fd, |
1527 | be64toh(get_packet_info.offset)); | |
1528 | goto error; | |
d3e2ba59 | 1529 | } |
5a693d30 | 1530 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1531 | if (read_len < len) { |
5a693d30 MD |
1532 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, |
1533 | vstream->stream_fd->fd, | |
1534 | be64toh(get_packet_info.offset)); | |
1535 | goto error; | |
d3e2ba59 | 1536 | } |
c4e361a4 | 1537 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1538 | reply.len = htobe32(len); |
1539 | send_data = 1; | |
1540 | goto send_reply; | |
1541 | ||
1542 | error: | |
c4e361a4 | 1543 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1544 | |
1545 | send_reply: | |
5a693d30 MD |
1546 | if (vstream) { |
1547 | pthread_mutex_unlock(&vstream->stream->lock); | |
1548 | } | |
1549 | send_reply_nolock: | |
d3e2ba59 | 1550 | reply.flags = htobe32(reply.flags); |
eea7556c MD |
1551 | |
1552 | health_code_update(); | |
2f8f53af | 1553 | |
58eb9381 | 1554 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1555 | if (ret < 0) { |
5a693d30 | 1556 | goto end_free; |
d3e2ba59 | 1557 | } |
eea7556c | 1558 | health_code_update(); |
d3e2ba59 JD |
1559 | |
1560 | if (send_data) { | |
eea7556c | 1561 | health_code_update(); |
58eb9381 | 1562 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1563 | if (ret < 0) { |
5a693d30 | 1564 | goto end_free; |
d3e2ba59 | 1565 | } |
eea7556c | 1566 | health_code_update(); |
d3e2ba59 JD |
1567 | } |
1568 | ||
1569 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1570 | be64toh(get_packet_info.stream_id)); | |
1571 | ||
5a693d30 | 1572 | end_free: |
d3e2ba59 | 1573 | free(data); |
d3e2ba59 | 1574 | end: |
5a693d30 MD |
1575 | if (vstream) { |
1576 | viewer_stream_put(vstream); | |
1577 | } | |
d3e2ba59 JD |
1578 | return ret; |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * Send the session's metadata | |
1583 | * | |
1584 | * Return 0 on success else a negative value. | |
1585 | */ | |
1586 | static | |
58eb9381 | 1587 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1588 | { |
1589 | int ret = 0; | |
1590 | ssize_t read_len; | |
1591 | uint64_t len = 0; | |
1592 | char *data = NULL; | |
1593 | struct lttng_viewer_get_metadata request; | |
1594 | struct lttng_viewer_metadata_packet reply; | |
5a693d30 | 1595 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1596 | |
58eb9381 | 1597 | assert(conn); |
d3e2ba59 JD |
1598 | |
1599 | DBG("Relay get metadata"); | |
1600 | ||
eea7556c | 1601 | health_code_update(); |
2f8f53af | 1602 | |
58eb9381 | 1603 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1604 | if (ret < 0) { |
d3e2ba59 JD |
1605 | goto end; |
1606 | } | |
eea7556c | 1607 | health_code_update(); |
d3e2ba59 | 1608 | |
53efb85a MD |
1609 | memset(&reply, 0, sizeof(reply)); |
1610 | ||
5a693d30 MD |
1611 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1612 | if (!vstream) { | |
1613 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); | |
1614 | goto send_reply; | |
d3e2ba59 | 1615 | } |
5a693d30 MD |
1616 | pthread_mutex_lock(&vstream->stream->lock); |
1617 | if (!vstream->stream->is_metadata) { | |
1618 | ERR("Invalid metadata stream"); | |
6763619c JD |
1619 | goto error; |
1620 | } | |
1621 | ||
5a693d30 | 1622 | assert(vstream->metadata_sent <= vstream->stream->metadata_received); |
2a174661 | 1623 | |
5a693d30 | 1624 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
d3e2ba59 | 1625 | if (len == 0) { |
c4e361a4 | 1626 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1627 | goto send_reply; |
1628 | } | |
1629 | ||
1630 | /* first time, we open the metadata file */ | |
5a693d30 | 1631 | if (!vstream->stream_fd) { |
d3e2ba59 JD |
1632 | char fullpath[PATH_MAX]; |
1633 | ||
5a693d30 MD |
1634 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", vstream->path_name, |
1635 | vstream->channel_name); | |
d3e2ba59 JD |
1636 | if (ret < 0) { |
1637 | goto error; | |
1638 | } | |
1639 | ret = open(fullpath, O_RDONLY); | |
1640 | if (ret < 0) { | |
1641 | PERROR("Relay opening metadata file"); | |
1642 | goto error; | |
1643 | } | |
5a693d30 MD |
1644 | vstream->stream_fd = stream_fd_create(ret); |
1645 | if (!vstream->stream_fd) { | |
1646 | if (close(ret)) { | |
1647 | PERROR("close"); | |
1648 | } | |
1649 | goto error; | |
1650 | } | |
d3e2ba59 JD |
1651 | } |
1652 | ||
1653 | reply.len = htobe64(len); | |
1654 | data = zmalloc(len); | |
1655 | if (!data) { | |
1656 | PERROR("viewer metadata zmalloc"); | |
1657 | goto error; | |
1658 | } | |
1659 | ||
5a693d30 | 1660 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1661 | if (read_len < len) { |
d3e2ba59 JD |
1662 | PERROR("Relay reading metadata file"); |
1663 | goto error; | |
1664 | } | |
5a693d30 MD |
1665 | vstream->metadata_sent += read_len; |
1666 | if (vstream->metadata_sent == vstream->stream->metadata_received | |
1667 | && vstream->stream->closed) { | |
1668 | /* Release ownership for the viewer metadata stream. */ | |
1669 | viewer_stream_put(vstream); | |
1670 | } | |
1671 | ||
c4e361a4 | 1672 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
5a693d30 | 1673 | |
d3e2ba59 JD |
1674 | goto send_reply; |
1675 | ||
1676 | error: | |
c4e361a4 | 1677 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1678 | |
1679 | send_reply: | |
eea7556c | 1680 | health_code_update(); |
5a693d30 MD |
1681 | if (vstream) { |
1682 | pthread_mutex_unlock(&vstream->stream->lock); | |
1683 | } | |
58eb9381 | 1684 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1685 | if (ret < 0) { |
5a693d30 | 1686 | goto end_free; |
d3e2ba59 | 1687 | } |
eea7556c | 1688 | health_code_update(); |
d3e2ba59 JD |
1689 | |
1690 | if (len > 0) { | |
58eb9381 | 1691 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1692 | if (ret < 0) { |
5a693d30 | 1693 | goto end_free; |
d3e2ba59 JD |
1694 | } |
1695 | } | |
1696 | ||
1697 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1698 | be64toh(request.stream_id)); | |
1699 | ||
1700 | DBG("Metadata sent"); | |
1701 | ||
5a693d30 | 1702 | end_free: |
d3e2ba59 | 1703 | free(data); |
d3e2ba59 | 1704 | end: |
5a693d30 MD |
1705 | if (vstream) { |
1706 | viewer_stream_put(vstream); | |
1707 | } | |
d3e2ba59 JD |
1708 | return ret; |
1709 | } | |
1710 | ||
c3b7390b JD |
1711 | /* |
1712 | * Create a viewer session. | |
1713 | * | |
1714 | * Return 0 on success or else a negative value. | |
1715 | */ | |
1716 | static | |
1717 | int viewer_create_session(struct relay_connection *conn) | |
1718 | { | |
1719 | int ret; | |
1720 | struct lttng_viewer_create_session_response resp; | |
1721 | ||
1722 | DBG("Viewer create session received"); | |
1723 | ||
53efb85a | 1724 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1725 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
5a693d30 | 1726 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
1727 | if (!conn->viewer_session) { |
1728 | ERR("Allocation viewer session"); | |
1729 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1730 | goto send_reply; | |
1731 | } | |
c3b7390b JD |
1732 | |
1733 | send_reply: | |
1734 | health_code_update(); | |
1735 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1736 | if (ret < 0) { | |
1737 | goto end; | |
1738 | } | |
1739 | health_code_update(); | |
1740 | ret = 0; | |
1741 | ||
1742 | end: | |
1743 | return ret; | |
1744 | } | |
1745 | ||
1746 | ||
d3e2ba59 JD |
1747 | /* |
1748 | * live_relay_unknown_command: send -1 if received unknown command | |
1749 | */ | |
1750 | static | |
58eb9381 | 1751 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1752 | { |
1753 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1754 | |
53efb85a | 1755 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1756 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1757 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1758 | } |
1759 | ||
1760 | /* | |
1761 | * Process the commands received on the control socket | |
1762 | */ | |
1763 | static | |
1764 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1765 | struct relay_connection *conn) |
d3e2ba59 JD |
1766 | { |
1767 | int ret = 0; | |
2f8f53af DG |
1768 | uint32_t msg_value; |
1769 | ||
2f8f53af DG |
1770 | msg_value = be32toh(recv_hdr->cmd); |
1771 | ||
1772 | /* | |
1773 | * Make sure we've done the version check before any command other then a | |
1774 | * new client connection. | |
1775 | */ | |
c4e361a4 | 1776 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1777 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1778 | ret = -1; |
1779 | goto end; | |
1780 | } | |
d3e2ba59 | 1781 | |
2f8f53af | 1782 | switch (msg_value) { |
c4e361a4 | 1783 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1784 | ret = viewer_connect(conn); |
d3e2ba59 | 1785 | break; |
c4e361a4 | 1786 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1787 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1788 | break; |
c4e361a4 | 1789 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1790 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1791 | break; |
c4e361a4 | 1792 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1793 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1794 | break; |
c4e361a4 | 1795 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1796 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1797 | break; |
c4e361a4 | 1798 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1799 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1800 | break; |
c4e361a4 | 1801 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1802 | ret = viewer_get_new_streams(conn); |
80e8027a | 1803 | break; |
c3b7390b JD |
1804 | case LTTNG_VIEWER_CREATE_SESSION: |
1805 | ret = viewer_create_session(conn); | |
1806 | break; | |
d3e2ba59 | 1807 | default: |
5a693d30 MD |
1808 | ERR("Received unknown viewer command (%u)", |
1809 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 1810 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1811 | ret = -1; |
1812 | goto end; | |
1813 | } | |
1814 | ||
1815 | end: | |
1816 | return ret; | |
1817 | } | |
1818 | ||
1819 | static | |
58eb9381 | 1820 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1821 | { |
1822 | int ret; | |
1823 | ||
58eb9381 | 1824 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1825 | |
1826 | ret = close(pollfd); | |
1827 | if (ret < 0) { | |
1828 | ERR("Closing pollfd %d", pollfd); | |
1829 | } | |
1830 | } | |
1831 | ||
d3e2ba59 JD |
1832 | /* |
1833 | * This thread does the actual work | |
1834 | */ | |
1835 | static | |
1836 | void *thread_worker(void *data) | |
1837 | { | |
1838 | int ret, err = -1; | |
1839 | uint32_t nb_fd; | |
d3e2ba59 | 1840 | struct lttng_poll_event events; |
5a693d30 | 1841 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
1842 | struct lttng_ht_iter iter; |
1843 | struct lttng_viewer_cmd recv_hdr; | |
302d8906 | 1844 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
1845 | |
1846 | DBG("[thread] Live viewer relay worker started"); | |
1847 | ||
1848 | rcu_register_thread(); | |
1849 | ||
eea7556c MD |
1850 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1851 | ||
9b5e0863 MD |
1852 | if (testpoint(relayd_thread_live_worker)) { |
1853 | goto error_testpoint; | |
1854 | } | |
1855 | ||
d3e2ba59 | 1856 | /* table of connections indexed on socket */ |
5a693d30 MD |
1857 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1858 | if (!viewer_connections_ht) { | |
1859 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
1860 | } |
1861 | ||
1862 | ret = create_thread_poll_set(&events, 2); | |
1863 | if (ret < 0) { | |
1864 | goto error_poll_create; | |
1865 | } | |
1866 | ||
58eb9381 | 1867 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1868 | if (ret < 0) { |
1869 | goto error; | |
1870 | } | |
1871 | ||
1872 | restart: | |
1873 | while (1) { | |
1874 | int i; | |
1875 | ||
eea7556c MD |
1876 | health_code_update(); |
1877 | ||
d3e2ba59 JD |
1878 | /* Infinite blocking call, waiting for transmission */ |
1879 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1880 | health_poll_entry(); |
d3e2ba59 | 1881 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1882 | health_poll_exit(); |
d3e2ba59 JD |
1883 | if (ret < 0) { |
1884 | /* | |
1885 | * Restart interrupted system call. | |
1886 | */ | |
1887 | if (errno == EINTR) { | |
1888 | goto restart; | |
1889 | } | |
1890 | goto error; | |
1891 | } | |
1892 | ||
1893 | nb_fd = ret; | |
1894 | ||
1895 | /* | |
1896 | * Process control. The control connection is prioritised so we don't | |
1897 | * starve it with high throughput tracing data on the data | |
1898 | * connection. | |
1899 | */ | |
1900 | for (i = 0; i < nb_fd; i++) { | |
1901 | /* Fetch once the poll data */ | |
1902 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1903 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1904 | ||
eea7556c MD |
1905 | health_code_update(); |
1906 | ||
fd20dac9 MD |
1907 | if (!revents) { |
1908 | /* No activity for this FD (poll implementation). */ | |
1909 | continue; | |
1910 | } | |
1911 | ||
d3e2ba59 | 1912 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 1913 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
1914 | if (ret) { |
1915 | err = 0; | |
1916 | goto exit; | |
1917 | } | |
1918 | ||
5a693d30 | 1919 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 1920 | if (pollfd == live_conn_pipe[0]) { |
d3e2ba59 JD |
1921 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1922 | ERR("Relay live pipe error"); | |
1923 | goto error; | |
1924 | } else if (revents & LPOLLIN) { | |
302d8906 JG |
1925 | struct relay_connection *conn; |
1926 | ||
5a693d30 MD |
1927 | ret = lttng_read(live_conn_pipe[0], |
1928 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
1929 | if (ret < 0) { |
1930 | goto error; | |
1931 | } | |
58eb9381 DG |
1932 | lttng_poll_add(&events, conn->sock->fd, |
1933 | LPOLLIN | LPOLLRDHUP); | |
5a693d30 MD |
1934 | connection_ht_add(viewer_connections_ht, conn); |
1935 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
d3e2ba59 | 1936 | } |
58eb9381 | 1937 | } else { |
5a693d30 | 1938 | /* Connection activity. */ |
302d8906 JG |
1939 | struct relay_connection *conn; |
1940 | ||
5a693d30 MD |
1941 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
1942 | if (!conn) { | |
1943 | continue; | |
1944 | } | |
58eb9381 DG |
1945 | |
1946 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1947 | cleanup_connection_pollfd(&events, pollfd); | |
5a693d30 MD |
1948 | /* Put "create" ownership reference. */ |
1949 | connection_put(conn); | |
d3e2ba59 | 1950 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
1951 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
1952 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 1953 | if (ret <= 0) { |
5a693d30 | 1954 | /* Connection closed. */ |
58eb9381 | 1955 | cleanup_connection_pollfd(&events, pollfd); |
5a693d30 MD |
1956 | /* Put "create" ownership reference. */ |
1957 | connection_put(conn); | |
58eb9381 | 1958 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 1959 | } else { |
58eb9381 | 1960 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
1961 | if (ret < 0) { |
1962 | /* Clear the session on error. */ | |
58eb9381 | 1963 | cleanup_connection_pollfd(&events, pollfd); |
5a693d30 MD |
1964 | /* Put "create" ownership reference. */ |
1965 | connection_put(conn); | |
d3e2ba59 JD |
1966 | DBG("Viewer connection closed with %d", pollfd); |
1967 | } | |
1968 | } | |
1969 | } | |
5a693d30 MD |
1970 | /* Put local "get_by_sock" reference. */ |
1971 | connection_put(conn); | |
d3e2ba59 JD |
1972 | } |
1973 | } | |
1974 | } | |
1975 | ||
1976 | exit: | |
1977 | error: | |
1978 | lttng_poll_clean(&events); | |
1979 | ||
58eb9381 | 1980 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 1981 | rcu_read_lock(); |
5a693d30 | 1982 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
302d8906 | 1983 | destroy_conn, |
58eb9381 | 1984 | sock_n.node) { |
eea7556c | 1985 | health_code_update(); |
5a693d30 | 1986 | connection_put(destroy_conn); |
d3e2ba59 JD |
1987 | } |
1988 | rcu_read_unlock(); | |
1989 | error_poll_create: | |
5a693d30 MD |
1990 | lttng_ht_destroy(viewer_connections_ht); |
1991 | viewer_connections_ht_error: | |
58eb9381 DG |
1992 | /* Close relay conn pipes */ |
1993 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
1994 | if (err) { |
1995 | DBG("Viewer worker thread exited with error"); | |
1996 | } | |
1997 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 1998 | error_testpoint: |
eea7556c MD |
1999 | if (err) { |
2000 | health_error(); | |
2001 | ERR("Health error occurred in %s", __func__); | |
2002 | } | |
2003 | health_unregister(health_relayd); | |
b4aacfdc MD |
2004 | if (lttng_relay_stop_threads()) { |
2005 | ERR("Error stopping threads"); | |
178a0557 | 2006 | } |
d3e2ba59 JD |
2007 | rcu_unregister_thread(); |
2008 | return NULL; | |
2009 | } | |
2010 | ||
2011 | /* | |
2012 | * Create the relay command pipe to wake thread_manage_apps. | |
2013 | * Closed in cleanup(). | |
2014 | */ | |
58eb9381 | 2015 | static int create_conn_pipe(void) |
d3e2ba59 | 2016 | { |
178a0557 MD |
2017 | return utils_create_pipe_cloexec(live_conn_pipe); |
2018 | } | |
d3e2ba59 | 2019 | |
178a0557 | 2020 | int relayd_live_join(void) |
d3e2ba59 | 2021 | { |
178a0557 | 2022 | int ret, retval = 0; |
d3e2ba59 JD |
2023 | void *status; |
2024 | ||
d3e2ba59 | 2025 | ret = pthread_join(live_listener_thread, &status); |
178a0557 MD |
2026 | if (ret) { |
2027 | errno = ret; | |
d3e2ba59 | 2028 | PERROR("pthread_join live listener"); |
178a0557 | 2029 | retval = -1; |
d3e2ba59 JD |
2030 | } |
2031 | ||
2032 | ret = pthread_join(live_worker_thread, &status); | |
178a0557 MD |
2033 | if (ret) { |
2034 | errno = ret; | |
d3e2ba59 | 2035 | PERROR("pthread_join live worker"); |
178a0557 | 2036 | retval = -1; |
d3e2ba59 JD |
2037 | } |
2038 | ||
2039 | ret = pthread_join(live_dispatcher_thread, &status); | |
178a0557 MD |
2040 | if (ret) { |
2041 | errno = ret; | |
d3e2ba59 | 2042 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2043 | retval = -1; |
d3e2ba59 JD |
2044 | } |
2045 | ||
178a0557 | 2046 | cleanup_relayd_live(); |
d3e2ba59 | 2047 | |
178a0557 | 2048 | return retval; |
d3e2ba59 JD |
2049 | } |
2050 | ||
2051 | /* | |
2052 | * main | |
2053 | */ | |
5a693d30 | 2054 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2055 | { |
178a0557 | 2056 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2057 | void *status; |
2058 | int is_root; | |
2059 | ||
178a0557 MD |
2060 | if (!uri) { |
2061 | retval = -1; | |
2062 | goto exit_init_data; | |
2063 | } | |
d3e2ba59 JD |
2064 | live_uri = uri; |
2065 | ||
d3e2ba59 JD |
2066 | /* Check if daemon is UID = 0 */ |
2067 | is_root = !getuid(); | |
2068 | ||
2069 | if (!is_root) { | |
2070 | if (live_uri->port < 1024) { | |
2071 | ERR("Need to be root to use ports < 1024"); | |
178a0557 MD |
2072 | retval = -1; |
2073 | goto exit_init_data; | |
d3e2ba59 JD |
2074 | } |
2075 | } | |
2076 | ||
2077 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2078 | if (create_conn_pipe()) { |
2079 | retval = -1; | |
2080 | goto exit_init_data; | |
d3e2ba59 JD |
2081 | } |
2082 | ||
2083 | /* Init relay command queue. */ | |
8bdee6e2 | 2084 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2085 | |
2086 | /* Set up max poll set size */ | |
25b397f9 MD |
2087 | if (lttng_poll_set_max_size()) { |
2088 | retval = -1; | |
2089 | goto exit_init_data; | |
2090 | } | |
d3e2ba59 JD |
2091 | |
2092 | /* Setup the dispatcher thread */ | |
2093 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2094 | thread_dispatcher, (void *) NULL); | |
178a0557 MD |
2095 | if (ret) { |
2096 | errno = ret; | |
d3e2ba59 | 2097 | PERROR("pthread_create viewer dispatcher"); |
178a0557 MD |
2098 | retval = -1; |
2099 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2100 | } |
2101 | ||
2102 | /* Setup the worker thread */ | |
2103 | ret = pthread_create(&live_worker_thread, NULL, | |
5a693d30 | 2104 | thread_worker, NULL); |
178a0557 MD |
2105 | if (ret) { |
2106 | errno = ret; | |
d3e2ba59 | 2107 | PERROR("pthread_create viewer worker"); |
178a0557 MD |
2108 | retval = -1; |
2109 | goto exit_worker_thread; | |
d3e2ba59 JD |
2110 | } |
2111 | ||
2112 | /* Setup the listener thread */ | |
2113 | ret = pthread_create(&live_listener_thread, NULL, | |
2114 | thread_listener, (void *) NULL); | |
178a0557 MD |
2115 | if (ret) { |
2116 | errno = ret; | |
d3e2ba59 | 2117 | PERROR("pthread_create viewer listener"); |
178a0557 MD |
2118 | retval = -1; |
2119 | goto exit_listener_thread; | |
d3e2ba59 JD |
2120 | } |
2121 | ||
178a0557 MD |
2122 | /* |
2123 | * All OK, started all threads. | |
2124 | */ | |
2125 | return retval; | |
2126 | ||
9911d21b JG |
2127 | /* |
2128 | * Join on the live_listener_thread should anything be added after | |
2129 | * the live_listener thread's creation. | |
2130 | */ | |
d3e2ba59 | 2131 | |
178a0557 | 2132 | exit_listener_thread: |
d3e2ba59 | 2133 | |
d3e2ba59 | 2134 | ret = pthread_join(live_worker_thread, &status); |
178a0557 MD |
2135 | if (ret) { |
2136 | errno = ret; | |
d3e2ba59 | 2137 | PERROR("pthread_join live worker"); |
178a0557 | 2138 | retval = -1; |
d3e2ba59 | 2139 | } |
178a0557 | 2140 | exit_worker_thread: |
d3e2ba59 | 2141 | |
d3e2ba59 | 2142 | ret = pthread_join(live_dispatcher_thread, &status); |
178a0557 MD |
2143 | if (ret) { |
2144 | errno = ret; | |
d3e2ba59 | 2145 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2146 | retval = -1; |
d3e2ba59 | 2147 | } |
178a0557 | 2148 | exit_dispatcher_thread: |
d3e2ba59 | 2149 | |
178a0557 MD |
2150 | exit_init_data: |
2151 | cleanup_relayd_live(); | |
d3e2ba59 | 2152 | |
178a0557 | 2153 | return retval; |
d3e2ba59 | 2154 | } |