Commit | Line | Data |
---|---|---|
d3e2ba59 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
7591bab1 | 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> | |
7591bab1 | 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" |
7591bab1 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; | |
7591bab1 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 | } | |
7591bab1 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; | |
7591bab1 | 184 | session_put(session); |
f04a971b JD |
185 | if (ret == 1) { |
186 | goto end; | |
187 | } | |
2f8f53af | 188 | } |
f04a971b | 189 | end: |
7591bab1 | 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 | ||
7591bab1 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. */ |
7591bab1 | 223 | if (vstream->stream->trace->session->id != session->id || |
2f8f53af | 224 | (!ignore_sent_flag && vstream->sent_flag)) { |
7591bab1 MD |
225 | pthread_mutex_unlock(&vstream->stream->lock); |
226 | viewer_stream_put(vstream); | |
2f8f53af DG |
227 | continue; |
228 | } | |
229 | ||
7591bab1 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); |
7591bab1 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 | ||
7591bab1 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)); |
7591bab1 | 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, | |
bddf80e4 | 270 | uint32_t *nb_created, bool *closed) |
2f8f53af DG |
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 | /* | |
7591bab1 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 | */ |
7591bab1 | 282 | pthread_mutex_lock(&session->lock); |
2f8f53af | 283 | |
bddf80e4 MD |
284 | if (session->connection_closed) { |
285 | *closed = true; | |
286 | } | |
287 | ||
2f8f53af | 288 | /* |
7591bab1 MD |
289 | * Create viewer streams for relay streams that are ready to be |
290 | * used for a the given session id only. | |
2f8f53af | 291 | */ |
2a174661 DG |
292 | rcu_read_lock(); |
293 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
294 | node.node) { | |
295 | struct relay_stream *stream; | |
2f8f53af DG |
296 | |
297 | health_code_update(); | |
298 | ||
7591bab1 | 299 | if (!ctf_trace_get(ctf_trace)) { |
2f8f53af DG |
300 | continue; |
301 | } | |
302 | ||
7591bab1 | 303 | cds_list_for_each_entry_rcu(stream, &ctf_trace->stream_list, stream_node) { |
2a174661 DG |
304 | struct relay_viewer_stream *vstream; |
305 | ||
7591bab1 | 306 | if (!stream_get(stream)) { |
2a174661 DG |
307 | continue; |
308 | } | |
7591bab1 MD |
309 | /* |
310 | * stream published is protected by the session | |
311 | * lock. | |
312 | */ | |
313 | if (!stream->published) { | |
314 | goto next; | |
315 | } | |
c0bae11d MD |
316 | /* |
317 | * Stream has no data, don't consider it yet. | |
318 | */ | |
319 | if (stream->prev_seq == -1ULL) { | |
320 | goto next; | |
321 | } | |
7591bab1 | 322 | vstream = viewer_stream_get_by_id(stream->stream_handle); |
2f8f53af | 323 | if (!vstream) { |
7591bab1 | 324 | vstream = viewer_stream_create(stream, seek_t); |
2a174661 DG |
325 | if (!vstream) { |
326 | ret = -1; | |
7591bab1 MD |
327 | ctf_trace_put(ctf_trace); |
328 | stream_put(stream); | |
2a174661 DG |
329 | goto error_unlock; |
330 | } | |
2a174661 DG |
331 | |
332 | if (nb_created) { | |
333 | /* Update number of created stream counter. */ | |
334 | (*nb_created)++; | |
335 | } | |
2229a09c MD |
336 | /* |
337 | * Ensure a self-reference is preserved even | |
338 | * after we have put our local reference. | |
339 | */ | |
340 | viewer_stream_get(vstream); | |
7591bab1 MD |
341 | } else { |
342 | if (!vstream->sent_flag && nb_unsent) { | |
343 | /* Update number of unsent stream counter. */ | |
344 | (*nb_unsent)++; | |
345 | } | |
2f8f53af | 346 | } |
2a174661 DG |
347 | /* Update number of total stream counter. */ |
348 | if (nb_total) { | |
2229a09c MD |
349 | if (stream->is_metadata) { |
350 | if (!stream->closed || | |
351 | stream->metadata_received > vstream->metadata_sent) { | |
352 | (*nb_total)++; | |
353 | } | |
354 | } else { | |
355 | if (!stream->closed || | |
356 | !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
357 | ||
358 | (*nb_total)++; | |
359 | } | |
360 | } | |
2f8f53af | 361 | } |
2229a09c MD |
362 | /* Put local reference. */ |
363 | viewer_stream_put(vstream); | |
7591bab1 MD |
364 | next: |
365 | stream_put(stream); | |
2f8f53af | 366 | } |
7591bab1 | 367 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
368 | } |
369 | ||
370 | ret = 0; | |
371 | ||
372 | error_unlock: | |
2a174661 | 373 | rcu_read_unlock(); |
7591bab1 | 374 | pthread_mutex_unlock(&session->lock); |
2f8f53af DG |
375 | return ret; |
376 | } | |
377 | ||
b4aacfdc | 378 | int relayd_live_stop(void) |
d3e2ba59 | 379 | { |
b4aacfdc | 380 | /* Stop dispatch thread */ |
d3e2ba59 | 381 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 382 | futex_nto1_wake(&viewer_conn_queue.futex); |
b4aacfdc | 383 | return 0; |
d3e2ba59 JD |
384 | } |
385 | ||
d3e2ba59 JD |
386 | /* |
387 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
388 | */ | |
389 | static | |
390 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
391 | { | |
392 | int ret; | |
393 | ||
394 | if (events == NULL || size == 0) { | |
395 | ret = -1; | |
396 | goto error; | |
397 | } | |
398 | ||
399 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
400 | if (ret < 0) { | |
401 | goto error; | |
402 | } | |
403 | ||
404 | /* Add quit pipe */ | |
bcf4a440 | 405 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
406 | if (ret < 0) { |
407 | goto error; | |
408 | } | |
409 | ||
410 | return 0; | |
411 | ||
412 | error: | |
413 | return ret; | |
414 | } | |
415 | ||
416 | /* | |
417 | * Check if the thread quit pipe was triggered. | |
418 | * | |
419 | * Return 1 if it was triggered else 0; | |
420 | */ | |
421 | static | |
bcf4a440 | 422 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 423 | { |
bcf4a440 | 424 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
425 | return 1; |
426 | } | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | /* | |
432 | * Create and init socket from uri. | |
433 | */ | |
434 | static | |
435 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
436 | { | |
437 | int ret; | |
438 | struct lttcomm_sock *sock = NULL; | |
439 | ||
440 | sock = lttcomm_alloc_sock_from_uri(uri); | |
441 | if (sock == NULL) { | |
442 | ERR("Allocating socket"); | |
443 | goto error; | |
444 | } | |
445 | ||
446 | ret = lttcomm_create_sock(sock); | |
447 | if (ret < 0) { | |
448 | goto error; | |
449 | } | |
450 | DBG("Listening on sock %d for live", sock->fd); | |
451 | ||
452 | ret = sock->ops->bind(sock); | |
453 | if (ret < 0) { | |
454 | goto error; | |
455 | } | |
456 | ||
457 | ret = sock->ops->listen(sock, -1); | |
458 | if (ret < 0) { | |
459 | goto error; | |
460 | ||
461 | } | |
462 | ||
463 | return sock; | |
464 | ||
465 | error: | |
466 | if (sock) { | |
467 | lttcomm_destroy_sock(sock); | |
468 | } | |
469 | return NULL; | |
470 | } | |
471 | ||
472 | /* | |
473 | * This thread manages the listening for new connections on the network | |
474 | */ | |
475 | static | |
476 | void *thread_listener(void *data) | |
477 | { | |
478 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
479 | uint32_t revents, nb_fd; |
480 | struct lttng_poll_event events; | |
481 | struct lttcomm_sock *live_control_sock; | |
482 | ||
483 | DBG("[thread] Relay live listener started"); | |
484 | ||
eea7556c MD |
485 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
486 | ||
487 | health_code_update(); | |
488 | ||
d3e2ba59 JD |
489 | live_control_sock = init_socket(live_uri); |
490 | if (!live_control_sock) { | |
491 | goto error_sock_control; | |
492 | } | |
493 | ||
fb4d42ab | 494 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
d3e2ba59 JD |
495 | ret = create_thread_poll_set(&events, 2); |
496 | if (ret < 0) { | |
497 | goto error_create_poll; | |
498 | } | |
499 | ||
500 | /* Add the control socket */ | |
501 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
502 | if (ret < 0) { | |
503 | goto error_poll_add; | |
504 | } | |
505 | ||
3fd27398 MD |
506 | lttng_relay_notify_ready(); |
507 | ||
9b5e0863 MD |
508 | if (testpoint(relayd_thread_live_listener)) { |
509 | goto error_testpoint; | |
510 | } | |
511 | ||
d3e2ba59 | 512 | while (1) { |
eea7556c MD |
513 | health_code_update(); |
514 | ||
d3e2ba59 JD |
515 | DBG("Listener accepting live viewers connections"); |
516 | ||
517 | restart: | |
eea7556c | 518 | health_poll_entry(); |
d3e2ba59 | 519 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 520 | health_poll_exit(); |
d3e2ba59 JD |
521 | if (ret < 0) { |
522 | /* | |
523 | * Restart interrupted system call. | |
524 | */ | |
525 | if (errno == EINTR) { | |
526 | goto restart; | |
527 | } | |
528 | goto error; | |
529 | } | |
530 | nb_fd = ret; | |
531 | ||
532 | DBG("Relay new viewer connection received"); | |
533 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
534 | health_code_update(); |
535 | ||
d3e2ba59 JD |
536 | /* Fetch once the poll data */ |
537 | revents = LTTNG_POLL_GETEV(&events, i); | |
538 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
539 | ||
fd20dac9 MD |
540 | if (!revents) { |
541 | /* No activity for this FD (poll implementation). */ | |
542 | continue; | |
543 | } | |
544 | ||
d3e2ba59 | 545 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 546 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
547 | if (ret) { |
548 | err = 0; | |
549 | goto exit; | |
550 | } | |
551 | ||
552 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
553 | ERR("socket poll error"); | |
554 | goto error; | |
555 | } else if (revents & LPOLLIN) { | |
556 | /* | |
7591bab1 MD |
557 | * A new connection is requested, therefore a |
558 | * viewer connection is allocated in this | |
559 | * thread, enqueued to a global queue and | |
560 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 561 | */ |
58eb9381 DG |
562 | int val = 1; |
563 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
564 | struct lttcomm_sock *newsock; |
565 | ||
d3e2ba59 JD |
566 | newsock = live_control_sock->ops->accept(live_control_sock); |
567 | if (!newsock) { | |
568 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
569 | goto error; |
570 | } | |
571 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 572 | |
d3e2ba59 | 573 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 574 | sizeof(val)); |
d3e2ba59 JD |
575 | if (ret < 0) { |
576 | PERROR("setsockopt inet"); | |
577 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
578 | goto error; |
579 | } | |
7591bab1 MD |
580 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
581 | if (!new_conn) { | |
582 | lttcomm_destroy_sock(newsock); | |
583 | goto error; | |
584 | } | |
585 | /* Ownership assumed by the connection. */ | |
586 | newsock = NULL; | |
d3e2ba59 | 587 | |
58eb9381 | 588 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
589 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
590 | &new_conn->qnode); | |
d3e2ba59 JD |
591 | |
592 | /* | |
7591bab1 MD |
593 | * Wake the dispatch queue futex. |
594 | * Implicit memory barrier with the | |
595 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 596 | */ |
58eb9381 | 597 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
598 | } |
599 | } | |
600 | } | |
601 | ||
602 | exit: | |
603 | error: | |
604 | error_poll_add: | |
9b5e0863 | 605 | error_testpoint: |
d3e2ba59 JD |
606 | lttng_poll_clean(&events); |
607 | error_create_poll: | |
608 | if (live_control_sock->fd >= 0) { | |
609 | ret = live_control_sock->ops->close(live_control_sock); | |
610 | if (ret) { | |
611 | PERROR("close"); | |
612 | } | |
613 | } | |
614 | lttcomm_destroy_sock(live_control_sock); | |
615 | error_sock_control: | |
616 | if (err) { | |
eea7556c | 617 | health_error(); |
d3e2ba59 JD |
618 | DBG("Live viewer listener thread exited with error"); |
619 | } | |
eea7556c | 620 | health_unregister(health_relayd); |
d3e2ba59 | 621 | DBG("Live viewer listener thread cleanup complete"); |
b4aacfdc MD |
622 | if (lttng_relay_stop_threads()) { |
623 | ERR("Error stopping threads"); | |
178a0557 | 624 | } |
d3e2ba59 JD |
625 | return NULL; |
626 | } | |
627 | ||
628 | /* | |
629 | * This thread manages the dispatching of the requests to worker threads | |
630 | */ | |
631 | static | |
632 | void *thread_dispatcher(void *data) | |
633 | { | |
6cd525e8 MD |
634 | int err = -1; |
635 | ssize_t ret; | |
8bdee6e2 | 636 | struct cds_wfcq_node *node; |
58eb9381 | 637 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
638 | |
639 | DBG("[thread] Live viewer relay dispatcher started"); | |
640 | ||
eea7556c MD |
641 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
642 | ||
9b5e0863 MD |
643 | if (testpoint(relayd_thread_live_dispatcher)) { |
644 | goto error_testpoint; | |
645 | } | |
646 | ||
eea7556c MD |
647 | health_code_update(); |
648 | ||
d3e2ba59 | 649 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
650 | health_code_update(); |
651 | ||
d3e2ba59 | 652 | /* Atomically prepare the queue futex */ |
58eb9381 | 653 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
654 | |
655 | do { | |
eea7556c MD |
656 | health_code_update(); |
657 | ||
d3e2ba59 | 658 | /* Dequeue commands */ |
8bdee6e2 SM |
659 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
660 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
661 | if (node == NULL) { |
662 | DBG("Woken up but nothing in the live-viewer " | |
663 | "relay command queue"); | |
664 | /* Continue thread execution */ | |
665 | break; | |
666 | } | |
58eb9381 | 667 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 668 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 669 | conn->sock->fd); |
d3e2ba59 JD |
670 | |
671 | /* | |
7591bab1 MD |
672 | * Inform worker thread of the new request. This |
673 | * call is blocking so we can be assured that | |
674 | * the data will be read at some point in time | |
675 | * or wait to the end of the world :) | |
d3e2ba59 | 676 | */ |
58eb9381 DG |
677 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
678 | if (ret < 0) { | |
679 | PERROR("write conn pipe"); | |
7591bab1 | 680 | connection_put(conn); |
d3e2ba59 JD |
681 | goto error; |
682 | } | |
683 | } while (node != NULL); | |
684 | ||
685 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 686 | health_poll_entry(); |
58eb9381 | 687 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 688 | health_poll_exit(); |
d3e2ba59 JD |
689 | } |
690 | ||
eea7556c MD |
691 | /* Normal exit, no error */ |
692 | err = 0; | |
693 | ||
d3e2ba59 | 694 | error: |
9b5e0863 | 695 | error_testpoint: |
eea7556c MD |
696 | if (err) { |
697 | health_error(); | |
698 | ERR("Health error occurred in %s", __func__); | |
699 | } | |
700 | health_unregister(health_relayd); | |
d3e2ba59 | 701 | DBG("Live viewer dispatch thread dying"); |
b4aacfdc MD |
702 | if (lttng_relay_stop_threads()) { |
703 | ERR("Error stopping threads"); | |
178a0557 | 704 | } |
d3e2ba59 JD |
705 | return NULL; |
706 | } | |
707 | ||
708 | /* | |
709 | * Establish connection with the viewer and check the versions. | |
710 | * | |
711 | * Return 0 on success or else negative value. | |
712 | */ | |
713 | static | |
58eb9381 | 714 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
715 | { |
716 | int ret; | |
717 | struct lttng_viewer_connect reply, msg; | |
718 | ||
58eb9381 | 719 | conn->version_check_done = 1; |
d3e2ba59 | 720 | |
eea7556c MD |
721 | health_code_update(); |
722 | ||
2f8f53af DG |
723 | DBG("Viewer is establishing a connection to the relayd."); |
724 | ||
58eb9381 | 725 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 726 | if (ret < 0) { |
d3e2ba59 JD |
727 | goto end; |
728 | } | |
729 | ||
eea7556c MD |
730 | health_code_update(); |
731 | ||
f46b2ce6 | 732 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
733 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
734 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
735 | ||
736 | /* Major versions must be the same */ | |
737 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
738 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
739 | reply.major, be32toh(msg.major)); | |
72180669 | 740 | ret = -1; |
d3e2ba59 JD |
741 | goto end; |
742 | } | |
743 | ||
58eb9381 | 744 | conn->major = reply.major; |
d3e2ba59 JD |
745 | /* We adapt to the lowest compatible version */ |
746 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 747 | conn->minor = reply.minor; |
d3e2ba59 | 748 | } else { |
58eb9381 | 749 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
750 | } |
751 | ||
c4e361a4 | 752 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 753 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 754 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 755 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
756 | } else { |
757 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
758 | ret = -1; | |
759 | goto end; | |
760 | } | |
761 | ||
762 | reply.major = htobe32(reply.major); | |
763 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 764 | if (conn->type == RELAY_VIEWER_COMMAND) { |
93b4787b | 765 | /* |
7591bab1 MD |
766 | * Increment outside of htobe64 macro, because the argument can |
767 | * be used more than once within the macro, and thus the | |
768 | * operation may be undefined. | |
93b4787b | 769 | */ |
7591bab1 | 770 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
93b4787b | 771 | last_relay_viewer_session_id++; |
7591bab1 | 772 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
93b4787b | 773 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 774 | } |
eea7556c MD |
775 | |
776 | health_code_update(); | |
777 | ||
58eb9381 | 778 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 779 | if (ret < 0) { |
2f8f53af | 780 | goto end; |
d3e2ba59 JD |
781 | } |
782 | ||
eea7556c MD |
783 | health_code_update(); |
784 | ||
58eb9381 | 785 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
786 | ret = 0; |
787 | ||
788 | end: | |
789 | return ret; | |
790 | } | |
791 | ||
792 | /* | |
793 | * Send the viewer the list of current sessions. | |
7591bab1 MD |
794 | * We need to create a copy of the hash table content because otherwise |
795 | * we cannot assume the number of entries stays the same between getting | |
796 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
797 | * |
798 | * Return 0 on success or else a negative value. | |
799 | */ | |
800 | static | |
58eb9381 | 801 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
802 | { |
803 | int ret; | |
804 | struct lttng_viewer_list_sessions session_list; | |
d3e2ba59 | 805 | struct lttng_ht_iter iter; |
d3e2ba59 | 806 | struct relay_session *session; |
7591bab1 MD |
807 | struct lttng_viewer_session *send_session_buf = NULL; |
808 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
809 | uint32_t count = 0; | |
d3e2ba59 JD |
810 | |
811 | DBG("List sessions received"); | |
812 | ||
7591bab1 MD |
813 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
814 | if (!send_session_buf) { | |
815 | return -1; | |
d3e2ba59 JD |
816 | } |
817 | ||
7591bab1 MD |
818 | rcu_read_lock(); |
819 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 820 | session_n.node) { |
7591bab1 | 821 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 822 | |
eea7556c MD |
823 | health_code_update(); |
824 | ||
7591bab1 MD |
825 | if (count >= buf_count) { |
826 | struct lttng_viewer_session *newbuf; | |
827 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 828 | |
7591bab1 MD |
829 | newbuf = realloc(send_session_buf, |
830 | new_buf_count * sizeof(*send_session_buf)); | |
831 | if (!newbuf) { | |
832 | ret = -1; | |
833 | rcu_read_unlock(); | |
834 | goto end_free; | |
835 | } | |
836 | send_session_buf = newbuf; | |
837 | buf_count = new_buf_count; | |
6763619c | 838 | } |
7591bab1 MD |
839 | send_session = &send_session_buf[count]; |
840 | strncpy(send_session->session_name, session->session_name, | |
841 | sizeof(send_session->session_name)); | |
842 | strncpy(send_session->hostname, session->hostname, | |
843 | sizeof(send_session->hostname)); | |
844 | send_session->id = htobe64(session->id); | |
845 | send_session->live_timer = htobe32(session->live_timer); | |
846 | if (session->viewer_attached) { | |
847 | send_session->clients = htobe32(1); | |
848 | } else { | |
849 | send_session->clients = htobe32(0); | |
d227d5bd | 850 | } |
7591bab1 MD |
851 | send_session->streams = htobe32(session->stream_count); |
852 | count++; | |
853 | } | |
854 | rcu_read_unlock(); | |
d227d5bd | 855 | |
7591bab1 | 856 | session_list.sessions_count = htobe32(count); |
d227d5bd | 857 | |
7591bab1 | 858 | health_code_update(); |
d227d5bd | 859 | |
7591bab1 MD |
860 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
861 | if (ret < 0) { | |
862 | goto end_free; | |
d227d5bd | 863 | } |
d227d5bd | 864 | |
7591bab1 | 865 | health_code_update(); |
d227d5bd | 866 | |
7591bab1 MD |
867 | ret = send_response(conn->sock, send_session_buf, |
868 | count * sizeof(*send_session_buf)); | |
869 | if (ret < 0) { | |
870 | goto end_free; | |
d227d5bd | 871 | } |
7591bab1 | 872 | health_code_update(); |
d227d5bd | 873 | |
7591bab1 MD |
874 | ret = 0; |
875 | end_free: | |
876 | free(send_session_buf); | |
877 | return ret; | |
d227d5bd JD |
878 | } |
879 | ||
80e8027a | 880 | /* |
7591bab1 | 881 | * Send the viewer the list of current streams. |
80e8027a JD |
882 | */ |
883 | static | |
58eb9381 | 884 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
885 | { |
886 | int ret, send_streams = 0; | |
7591bab1 | 887 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
888 | struct lttng_viewer_new_streams_request request; |
889 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 890 | struct relay_session *session; |
6763619c | 891 | uint64_t session_id; |
bddf80e4 | 892 | bool closed = false; |
80e8027a | 893 | |
58eb9381 | 894 | assert(conn); |
80e8027a JD |
895 | |
896 | DBG("Get new streams received"); | |
897 | ||
80e8027a JD |
898 | health_code_update(); |
899 | ||
2f8f53af | 900 | /* Receive the request from the connected client. */ |
58eb9381 | 901 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 902 | if (ret < 0) { |
80e8027a JD |
903 | goto error; |
904 | } | |
6763619c | 905 | session_id = be64toh(request.session_id); |
80e8027a JD |
906 | |
907 | health_code_update(); | |
908 | ||
53efb85a MD |
909 | memset(&response, 0, sizeof(response)); |
910 | ||
7591bab1 | 911 | session = session_get_by_id(session_id); |
2f8f53af | 912 | if (!session) { |
6763619c | 913 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 914 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
915 | goto send_reply; |
916 | } | |
917 | ||
7591bab1 | 918 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
80e8027a | 919 | send_streams = 0; |
c4e361a4 | 920 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
921 | goto send_reply; |
922 | } | |
923 | ||
6763619c JD |
924 | send_streams = 1; |
925 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
926 | ||
7591bab1 | 927 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
bddf80e4 | 928 | &nb_created, &closed); |
2f8f53af | 929 | if (ret < 0) { |
7591bab1 | 930 | goto end_put_session; |
2f8f53af DG |
931 | } |
932 | /* Only send back the newly created streams with the unsent ones. */ | |
933 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
934 | response.streams_count = htobe32(nb_streams); |
935 | ||
4479f682 | 936 | /* |
2229a09c MD |
937 | * If the session is closed, HUP when there are no more streams |
938 | * with data. | |
4479f682 | 939 | */ |
bddf80e4 | 940 | if (closed && nb_total == 0) { |
4479f682 | 941 | send_streams = 0; |
bddf80e4 | 942 | response.streams_count = 0; |
4479f682 JD |
943 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
944 | goto send_reply; | |
945 | } | |
946 | ||
80e8027a JD |
947 | send_reply: |
948 | health_code_update(); | |
58eb9381 | 949 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 950 | if (ret < 0) { |
7591bab1 | 951 | goto end_put_session; |
80e8027a JD |
952 | } |
953 | health_code_update(); | |
954 | ||
955 | /* | |
7591bab1 MD |
956 | * Unknown or empty session, just return gracefully, the viewer |
957 | * knows what is happening. | |
80e8027a JD |
958 | */ |
959 | if (!send_streams || !nb_streams) { | |
960 | ret = 0; | |
7591bab1 | 961 | goto end_put_session; |
80e8027a JD |
962 | } |
963 | ||
2f8f53af | 964 | /* |
7591bab1 MD |
965 | * Send stream and *DON'T* ignore the sent flag so every viewer |
966 | * streams that were not sent from that point will be sent to | |
967 | * the viewer. | |
2f8f53af | 968 | */ |
58eb9381 | 969 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af | 970 | if (ret < 0) { |
7591bab1 | 971 | goto end_put_session; |
80e8027a JD |
972 | } |
973 | ||
7591bab1 MD |
974 | end_put_session: |
975 | if (session) { | |
976 | session_put(session); | |
977 | } | |
80e8027a JD |
978 | error: |
979 | return ret; | |
980 | } | |
981 | ||
d3e2ba59 JD |
982 | /* |
983 | * Send the viewer the list of current sessions. | |
984 | */ | |
985 | static | |
58eb9381 | 986 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 987 | { |
2f8f53af DG |
988 | int send_streams = 0; |
989 | ssize_t ret; | |
80e8027a | 990 | uint32_t nb_streams = 0; |
2f8f53af | 991 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
992 | struct lttng_viewer_attach_session_request request; |
993 | struct lttng_viewer_attach_session_response response; | |
7591bab1 | 994 | struct relay_session *session = NULL; |
bddf80e4 | 995 | bool closed = false; |
d3e2ba59 | 996 | |
58eb9381 | 997 | assert(conn); |
d3e2ba59 | 998 | |
eea7556c MD |
999 | health_code_update(); |
1000 | ||
2f8f53af | 1001 | /* Receive the request from the connected client. */ |
58eb9381 | 1002 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1003 | if (ret < 0) { |
d3e2ba59 JD |
1004 | goto error; |
1005 | } | |
1006 | ||
eea7556c MD |
1007 | health_code_update(); |
1008 | ||
53efb85a MD |
1009 | memset(&response, 0, sizeof(response)); |
1010 | ||
c3b7390b JD |
1011 | if (!conn->viewer_session) { |
1012 | DBG("Client trying to attach before creating a live viewer session"); | |
1013 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1014 | goto send_reply; | |
1015 | } | |
1016 | ||
7591bab1 | 1017 | session = session_get_by_id(be64toh(request.session_id)); |
2f8f53af | 1018 | if (!session) { |
d3e2ba59 JD |
1019 | DBG("Relay session %" PRIu64 " not found", |
1020 | be64toh(request.session_id)); | |
c4e361a4 | 1021 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1022 | goto send_reply; |
1023 | } | |
7591bab1 MD |
1024 | DBG("Attach session ID %" PRIu64 " received", |
1025 | be64toh(request.session_id)); | |
d3e2ba59 | 1026 | |
7591bab1 | 1027 | if (session->live_timer == 0) { |
d3e2ba59 | 1028 | DBG("Not live session"); |
c4e361a4 | 1029 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1030 | goto send_reply; |
7591bab1 MD |
1031 | } |
1032 | ||
1033 | send_streams = 1; | |
1034 | ret = viewer_session_attach(conn->viewer_session, session); | |
1035 | if (ret) { | |
1036 | DBG("Already a viewer attached"); | |
1037 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); | |
1038 | goto send_reply; | |
d3e2ba59 JD |
1039 | } |
1040 | ||
1041 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1042 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1043 | case LTTNG_VIEWER_SEEK_LAST: | |
7591bab1 | 1044 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1045 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1046 | break; |
1047 | default: | |
1048 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1049 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1050 | send_streams = 0; |
1051 | goto send_reply; | |
1052 | } | |
1053 | ||
bddf80e4 MD |
1054 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, |
1055 | NULL, &closed); | |
2f8f53af | 1056 | if (ret < 0) { |
7591bab1 | 1057 | goto end_put_session; |
d3e2ba59 | 1058 | } |
2f8f53af | 1059 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 | 1060 | |
bddf80e4 MD |
1061 | /* |
1062 | * If the session is closed when the viewer is attaching, it | |
1063 | * means some of the streams may have been concurrently removed, | |
1064 | * so we don't allow the viewer to attach, even if there are | |
1065 | * streams available. | |
1066 | */ | |
1067 | if (closed) { | |
1068 | send_streams = 0; | |
1069 | response.streams_count = 0; | |
1070 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
1071 | goto send_reply; | |
1072 | } | |
1073 | ||
d3e2ba59 | 1074 | send_reply: |
eea7556c | 1075 | health_code_update(); |
58eb9381 | 1076 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1077 | if (ret < 0) { |
7591bab1 | 1078 | goto end_put_session; |
d3e2ba59 | 1079 | } |
eea7556c | 1080 | health_code_update(); |
d3e2ba59 JD |
1081 | |
1082 | /* | |
7591bab1 MD |
1083 | * Unknown or empty session, just return gracefully, the viewer |
1084 | * knows what is happening. | |
d3e2ba59 | 1085 | */ |
157df586 | 1086 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1087 | ret = 0; |
7591bab1 | 1088 | goto end_put_session; |
d3e2ba59 JD |
1089 | } |
1090 | ||
2f8f53af | 1091 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1092 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af | 1093 | if (ret < 0) { |
7591bab1 | 1094 | goto end_put_session; |
d3e2ba59 | 1095 | } |
d3e2ba59 | 1096 | |
7591bab1 MD |
1097 | end_put_session: |
1098 | if (session) { | |
1099 | session_put(session); | |
1100 | } | |
4a9daf17 JD |
1101 | error: |
1102 | return ret; | |
1103 | } | |
1104 | ||
878c34cf DG |
1105 | /* |
1106 | * Open the index file if needed for the given vstream. | |
1107 | * | |
7591bab1 MD |
1108 | * If an index file is successfully opened, the vstream index_fd set with |
1109 | * it. | |
878c34cf DG |
1110 | * |
1111 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
7591bab1 MD |
1112 | * |
1113 | * Called with rstream lock held. | |
878c34cf DG |
1114 | */ |
1115 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1116 | struct relay_stream *rstream) | |
1117 | { | |
1118 | int ret = 0; | |
1119 | ||
7591bab1 | 1120 | if (vstream->index_fd) { |
878c34cf DG |
1121 | goto end; |
1122 | } | |
1123 | ||
1124 | /* | |
7591bab1 | 1125 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1126 | */ |
7591bab1 | 1127 | if (rstream->total_index_received == 0) { |
878c34cf DG |
1128 | ret = -ENOENT; |
1129 | goto end; | |
1130 | } | |
1131 | ret = index_open(vstream->path_name, vstream->channel_name, | |
7591bab1 MD |
1132 | vstream->stream->tracefile_count, |
1133 | vstream->current_tracefile_id); | |
878c34cf | 1134 | if (ret >= 0) { |
7591bab1 MD |
1135 | vstream->index_fd = stream_fd_create(ret); |
1136 | if (!vstream->index_fd) { | |
1137 | if (close(ret)) { | |
1138 | PERROR("close"); | |
1139 | } | |
1140 | ret = -1; | |
1141 | } else { | |
1142 | ret = 0; | |
1143 | } | |
878c34cf DG |
1144 | goto end; |
1145 | } | |
1146 | ||
1147 | end: | |
1148 | return ret; | |
1149 | } | |
1150 | ||
1151 | /* | |
7591bab1 MD |
1152 | * Check the status of the index for the given stream. This function |
1153 | * updates the index structure if needed and can put (close) the vstream | |
1154 | * in the HUP situation. | |
1155 | * | |
1156 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1157 | * that the index has been updated and is ready to be sent to the | |
1158 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1159 | * |
7591bab1 | 1160 | * Called with rstream lock held. |
878c34cf DG |
1161 | */ |
1162 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1163 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1164 | struct lttng_viewer_index *index) | |
1165 | { | |
1166 | int ret; | |
1167 | ||
7591bab1 MD |
1168 | if (trace->session->connection_closed |
1169 | && rstream->total_index_received | |
1170 | == vstream->last_sent_index) { | |
1171 | /* Last index sent and session connection is closed. */ | |
1172 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1173 | goto hup; | |
1174 | } else if (rstream->beacon_ts_end != -1ULL && | |
1175 | rstream->total_index_received | |
1176 | == vstream->last_sent_index) { | |
1177 | /* | |
1178 | * We've received a synchronization beacon and the last index | |
1179 | * available has been sent, the index for now is inactive. | |
1180 | * | |
1181 | * In this case, we have received a beacon which allows us to | |
1182 | * inform the client of a time interval during which we can | |
1183 | * guarantee that there are no events to read (and never will | |
1184 | * be). | |
1185 | */ | |
1186 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1187 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1188 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
1189 | goto index_ready; | |
1190 | } else if (rstream->total_index_received <= vstream->last_sent_index) { | |
1191 | /* | |
1192 | * This actually checks the case where recv == last_sent. | |
1193 | * In this case, we have not received a beacon. Therefore, we | |
1194 | * can only ask the client to retry later. | |
1195 | */ | |
1196 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1197 | goto index_ready; | |
1198 | } else if (!viewer_stream_is_tracefile_seq_readable(vstream, | |
1199 | vstream->current_tracefile_seq)) { | |
1200 | /* | |
1201 | * The producer has overwritten our current file. We | |
1202 | * need to rotate. | |
1203 | */ | |
1204 | DBG("Viewer stream %" PRIu64 " rotation due to overwrite", | |
1205 | vstream->stream->stream_handle); | |
1206 | ret = viewer_stream_rotate(vstream); | |
1207 | if (ret < 0) { | |
1208 | goto end; | |
1209 | } else if (ret == 1) { | |
1210 | /* EOF across entire stream. */ | |
1211 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1212 | goto hup; | |
1213 | } | |
1214 | assert(viewer_stream_is_tracefile_seq_readable(vstream, | |
1215 | vstream->current_tracefile_seq)); | |
1216 | /* ret == 0 means successful so we continue. */ | |
1217 | ret = 0; | |
1218 | } else { | |
1219 | ssize_t read_ret; | |
1220 | char tmp[1]; | |
1221 | ||
1222 | /* | |
1223 | * Use EOF on current index file to find out when we | |
1224 | * need to rotate. | |
1225 | */ | |
1226 | read_ret = lttng_read(vstream->index_fd->fd, tmp, 1); | |
1227 | if (read_ret == 1) { | |
1228 | off_t seek_ret; | |
1229 | ||
1230 | /* There is still data to read. Rewind position. */ | |
1231 | seek_ret = lseek(vstream->index_fd->fd, -1, SEEK_CUR); | |
1232 | if (seek_ret < 0) { | |
1233 | ret = -1; | |
1234 | goto end; | |
1235 | } | |
1236 | ret = 0; | |
1237 | } else if (read_ret == 0) { | |
1238 | /* EOF. We need to rotate. */ | |
1239 | DBG("Viewer stream %" PRIu64 " rotation due to EOF", | |
1240 | vstream->stream->stream_handle); | |
1241 | ret = viewer_stream_rotate(vstream); | |
878c34cf | 1242 | if (ret < 0) { |
7591bab1 | 1243 | goto end; |
878c34cf | 1244 | } else if (ret == 1) { |
7591bab1 | 1245 | /* EOF across entire stream. */ |
878c34cf DG |
1246 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
1247 | goto hup; | |
1248 | } | |
7591bab1 MD |
1249 | assert(viewer_stream_is_tracefile_seq_readable(vstream, |
1250 | vstream->current_tracefile_seq)); | |
878c34cf | 1251 | /* ret == 0 means successful so we continue. */ |
7591bab1 MD |
1252 | ret = 0; |
1253 | } else { | |
1254 | /* Error reading index. */ | |
1255 | ret = -1; | |
878c34cf | 1256 | } |
878c34cf | 1257 | } |
7591bab1 | 1258 | end: |
878c34cf DG |
1259 | return ret; |
1260 | ||
1261 | hup: | |
7591bab1 | 1262 | viewer_stream_put(vstream); |
878c34cf DG |
1263 | index_ready: |
1264 | return 1; | |
1265 | } | |
1266 | ||
d3e2ba59 JD |
1267 | /* |
1268 | * Send the next index for a stream. | |
1269 | * | |
1270 | * Return 0 on success or else a negative value. | |
1271 | */ | |
1272 | static | |
58eb9381 | 1273 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1274 | { |
1275 | int ret; | |
878c34cf | 1276 | ssize_t read_ret; |
d3e2ba59 JD |
1277 | struct lttng_viewer_get_next_index request_index; |
1278 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1279 | struct ctf_packet_index packet_index; |
7591bab1 MD |
1280 | struct relay_viewer_stream *vstream = NULL; |
1281 | struct relay_stream *rstream = NULL; | |
1282 | struct ctf_trace *ctf_trace = NULL; | |
1283 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1284 | |
58eb9381 | 1285 | assert(conn); |
d3e2ba59 JD |
1286 | |
1287 | DBG("Viewer get next index"); | |
1288 | ||
7591bab1 | 1289 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1290 | health_code_update(); |
2f8f53af | 1291 | |
58eb9381 | 1292 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1293 | if (ret < 0) { |
d3e2ba59 JD |
1294 | goto end; |
1295 | } | |
eea7556c | 1296 | health_code_update(); |
d3e2ba59 | 1297 | |
7591bab1 | 1298 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1299 | if (!vstream) { |
f1883937 MD |
1300 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1301 | goto send_reply; | |
2a174661 DG |
1302 | } |
1303 | ||
7591bab1 MD |
1304 | /* Use back. ref. Protected by refcounts. */ |
1305 | rstream = vstream->stream; | |
1306 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1307 | |
7591bab1 MD |
1308 | /* metadata_viewer_stream may be NULL. */ |
1309 | metadata_viewer_stream = | |
1310 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1311 | |
7591bab1 | 1312 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1313 | |
1314 | /* | |
1315 | * The viewer should not ask for index on metadata stream. | |
1316 | */ | |
7591bab1 | 1317 | if (rstream->is_metadata) { |
c4e361a4 | 1318 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1319 | goto send_reply; |
1320 | } | |
1321 | ||
878c34cf DG |
1322 | /* Try to open an index if one is needed for that stream. */ |
1323 | ret = try_open_index(vstream, rstream); | |
1324 | if (ret < 0) { | |
0e6830aa | 1325 | if (ret == -ENOENT) { |
d3e2ba59 | 1326 | /* |
7591bab1 MD |
1327 | * The index is created only when the first data |
1328 | * packet arrives, it might not be ready at the | |
1329 | * beginning of the session | |
d3e2ba59 | 1330 | */ |
c4e361a4 | 1331 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1332 | } else { |
1333 | /* Unhandled error. */ | |
c4e361a4 | 1334 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1335 | } |
878c34cf | 1336 | goto send_reply; |
d3e2ba59 JD |
1337 | } |
1338 | ||
878c34cf | 1339 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1340 | if (ret < 0) { |
7591bab1 | 1341 | goto error_put; |
878c34cf DG |
1342 | } else if (ret == 1) { |
1343 | /* | |
7591bab1 MD |
1344 | * We have no index to send and check_index_status has populated |
1345 | * viewer_index's status. | |
878c34cf | 1346 | */ |
d3e2ba59 JD |
1347 | goto send_reply; |
1348 | } | |
7591bab1 | 1349 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1350 | assert(!ret); |
d3e2ba59 | 1351 | |
7591bab1 MD |
1352 | /* |
1353 | * vstream->stream_fd may be NULL if it has been closed by | |
1354 | * tracefile rotation, or if we are at the beginning of the | |
1355 | * stream. We open the data stream file here to protect against | |
1356 | * overwrite caused by tracefile rotation (in association with | |
1357 | * unlink performed before overwrite). | |
1358 | */ | |
1359 | if (!vstream->stream_fd) { | |
1360 | char fullpath[PATH_MAX]; | |
1361 | ||
1362 | if (vstream->stream->tracefile_count > 0) { | |
1363 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, | |
1364 | vstream->path_name, | |
1365 | vstream->channel_name, | |
1366 | vstream->current_tracefile_id); | |
1367 | } else { | |
1368 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", | |
1369 | vstream->path_name, | |
1370 | vstream->channel_name); | |
1371 | } | |
1372 | if (ret < 0) { | |
1373 | goto error_put; | |
1374 | } | |
1375 | ret = open(fullpath, O_RDONLY); | |
1376 | if (ret < 0) { | |
1377 | PERROR("Relay opening trace file"); | |
1378 | goto error_put; | |
1379 | } | |
1380 | vstream->stream_fd = stream_fd_create(ret); | |
1381 | if (!vstream->stream_fd) { | |
1382 | if (close(ret)) { | |
1383 | PERROR("close"); | |
1384 | } | |
1385 | goto error_put; | |
1386 | } | |
d3e2ba59 JD |
1387 | } |
1388 | ||
f04a971b | 1389 | ret = check_new_streams(conn); |
4a9daf17 | 1390 | if (ret < 0) { |
7591bab1 MD |
1391 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1392 | goto send_reply; | |
4a9daf17 JD |
1393 | } else if (ret == 1) { |
1394 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1395 | } | |
1396 | ||
7591bab1 | 1397 | read_ret = lttng_read(vstream->index_fd->fd, &packet_index, |
6cd525e8 | 1398 | sizeof(packet_index)); |
7591bab1 MD |
1399 | if (read_ret < sizeof(packet_index)) { |
1400 | ERR("Relay reading index file %d returned %zd", | |
1401 | vstream->index_fd->fd, read_ret); | |
1402 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
6b6b9a5a | 1403 | goto send_reply; |
d3e2ba59 | 1404 | } else { |
c4e361a4 | 1405 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
d3e2ba59 JD |
1406 | vstream->last_sent_index++; |
1407 | } | |
1408 | ||
1409 | /* | |
1410 | * Indexes are stored in big endian, no need to switch before sending. | |
1411 | */ | |
7591bab1 MD |
1412 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1413 | rstream->stream_handle, | |
1414 | be64toh(packet_index.offset)); | |
d3e2ba59 JD |
1415 | viewer_index.offset = packet_index.offset; |
1416 | viewer_index.packet_size = packet_index.packet_size; | |
1417 | viewer_index.content_size = packet_index.content_size; | |
1418 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1419 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1420 | viewer_index.events_discarded = packet_index.events_discarded; | |
1421 | viewer_index.stream_id = packet_index.stream_id; | |
1422 | ||
1423 | send_reply: | |
f1883937 MD |
1424 | if (rstream) { |
1425 | pthread_mutex_unlock(&rstream->lock); | |
1426 | } | |
7591bab1 MD |
1427 | |
1428 | if (metadata_viewer_stream) { | |
1429 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1430 | DBG("get next index metadata check: recv %" PRIu64 | |
1431 | " sent %" PRIu64, | |
1432 | metadata_viewer_stream->stream->metadata_received, | |
1433 | metadata_viewer_stream->metadata_sent); | |
1434 | if (!metadata_viewer_stream->stream->metadata_received || | |
1435 | metadata_viewer_stream->stream->metadata_received > | |
1436 | metadata_viewer_stream->metadata_sent) { | |
1437 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1438 | } | |
1439 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1440 | } | |
1441 | ||
d3e2ba59 | 1442 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1443 | health_code_update(); |
2f8f53af | 1444 | |
58eb9381 | 1445 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1446 | if (ret < 0) { |
7591bab1 | 1447 | goto end; |
d3e2ba59 | 1448 | } |
eea7556c | 1449 | health_code_update(); |
d3e2ba59 | 1450 | |
2f8f53af | 1451 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", |
7591bab1 MD |
1452 | vstream->last_sent_index, |
1453 | vstream->stream->stream_handle); | |
d3e2ba59 | 1454 | end: |
7591bab1 MD |
1455 | if (metadata_viewer_stream) { |
1456 | viewer_stream_put(metadata_viewer_stream); | |
1457 | } | |
1458 | if (vstream) { | |
1459 | viewer_stream_put(vstream); | |
1460 | } | |
1461 | return ret; | |
1462 | ||
1463 | error_put: | |
1464 | pthread_mutex_unlock(&rstream->lock); | |
1465 | if (metadata_viewer_stream) { | |
1466 | viewer_stream_put(metadata_viewer_stream); | |
1467 | } | |
1468 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1469 | return ret; |
1470 | } | |
1471 | ||
1472 | /* | |
1473 | * Send the next index for a stream | |
1474 | * | |
1475 | * Return 0 on success or else a negative value. | |
1476 | */ | |
1477 | static | |
58eb9381 | 1478 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1479 | { |
1480 | int ret, send_data = 0; | |
1481 | char *data = NULL; | |
1482 | uint32_t len = 0; | |
1483 | ssize_t read_len; | |
1484 | struct lttng_viewer_get_packet get_packet_info; | |
1485 | struct lttng_viewer_trace_packet reply; | |
7591bab1 | 1486 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 JD |
1487 | |
1488 | DBG2("Relay get data packet"); | |
1489 | ||
eea7556c | 1490 | health_code_update(); |
2f8f53af | 1491 | |
7591bab1 MD |
1492 | ret = recv_request(conn->sock, &get_packet_info, |
1493 | sizeof(get_packet_info)); | |
2f8f53af | 1494 | if (ret < 0) { |
d3e2ba59 JD |
1495 | goto end; |
1496 | } | |
eea7556c | 1497 | health_code_update(); |
d3e2ba59 | 1498 | |
0233a6a5 DG |
1499 | /* From this point on, the error label can be reached. */ |
1500 | memset(&reply, 0, sizeof(reply)); | |
1501 | ||
7591bab1 MD |
1502 | vstream = viewer_stream_get_by_id(be64toh(get_packet_info.stream_id)); |
1503 | if (!vstream) { | |
ba014812 MD |
1504 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1505 | goto send_reply_nolock; | |
d3e2ba59 | 1506 | } |
2a174661 | 1507 | |
7591bab1 | 1508 | pthread_mutex_lock(&vstream->stream->lock); |
4a9daf17 | 1509 | |
d3e2ba59 JD |
1510 | len = be32toh(get_packet_info.len); |
1511 | data = zmalloc(len); | |
1512 | if (!data) { | |
1513 | PERROR("relay data zmalloc"); | |
1514 | goto error; | |
1515 | } | |
1516 | ||
7591bab1 MD |
1517 | ret = lseek(vstream->stream_fd->fd, be64toh(get_packet_info.offset), |
1518 | SEEK_SET); | |
d3e2ba59 | 1519 | if (ret < 0) { |
7591bab1 MD |
1520 | PERROR("lseek fd %d to offset %" PRIu64, vstream->stream_fd->fd, |
1521 | be64toh(get_packet_info.offset)); | |
1522 | goto error; | |
d3e2ba59 | 1523 | } |
7591bab1 | 1524 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1525 | if (read_len < len) { |
7591bab1 MD |
1526 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, |
1527 | vstream->stream_fd->fd, | |
1528 | be64toh(get_packet_info.offset)); | |
1529 | goto error; | |
d3e2ba59 | 1530 | } |
c4e361a4 | 1531 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1532 | reply.len = htobe32(len); |
1533 | send_data = 1; | |
1534 | goto send_reply; | |
1535 | ||
1536 | error: | |
c4e361a4 | 1537 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1538 | |
1539 | send_reply: | |
7591bab1 MD |
1540 | if (vstream) { |
1541 | pthread_mutex_unlock(&vstream->stream->lock); | |
1542 | } | |
1543 | send_reply_nolock: | |
d3e2ba59 | 1544 | reply.flags = htobe32(reply.flags); |
eea7556c MD |
1545 | |
1546 | health_code_update(); | |
2f8f53af | 1547 | |
58eb9381 | 1548 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1549 | if (ret < 0) { |
7591bab1 | 1550 | goto end_free; |
d3e2ba59 | 1551 | } |
eea7556c | 1552 | health_code_update(); |
d3e2ba59 JD |
1553 | |
1554 | if (send_data) { | |
eea7556c | 1555 | health_code_update(); |
58eb9381 | 1556 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1557 | if (ret < 0) { |
7591bab1 | 1558 | goto end_free; |
d3e2ba59 | 1559 | } |
eea7556c | 1560 | health_code_update(); |
d3e2ba59 JD |
1561 | } |
1562 | ||
1563 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1564 | be64toh(get_packet_info.stream_id)); | |
1565 | ||
7591bab1 | 1566 | end_free: |
d3e2ba59 | 1567 | free(data); |
d3e2ba59 | 1568 | end: |
7591bab1 MD |
1569 | if (vstream) { |
1570 | viewer_stream_put(vstream); | |
1571 | } | |
d3e2ba59 JD |
1572 | return ret; |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * Send the session's metadata | |
1577 | * | |
1578 | * Return 0 on success else a negative value. | |
1579 | */ | |
1580 | static | |
58eb9381 | 1581 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1582 | { |
1583 | int ret = 0; | |
1584 | ssize_t read_len; | |
1585 | uint64_t len = 0; | |
1586 | char *data = NULL; | |
1587 | struct lttng_viewer_get_metadata request; | |
1588 | struct lttng_viewer_metadata_packet reply; | |
7591bab1 | 1589 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1590 | |
58eb9381 | 1591 | assert(conn); |
d3e2ba59 JD |
1592 | |
1593 | DBG("Relay get metadata"); | |
1594 | ||
eea7556c | 1595 | health_code_update(); |
2f8f53af | 1596 | |
58eb9381 | 1597 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1598 | if (ret < 0) { |
d3e2ba59 JD |
1599 | goto end; |
1600 | } | |
eea7556c | 1601 | health_code_update(); |
d3e2ba59 | 1602 | |
53efb85a MD |
1603 | memset(&reply, 0, sizeof(reply)); |
1604 | ||
7591bab1 MD |
1605 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1606 | if (!vstream) { | |
3b463131 MD |
1607 | /* |
1608 | * The metadata stream can be closed by a CLOSE command | |
1609 | * just before we attach. It can also be closed by | |
1610 | * per-pid tracing during tracing. Therefore, it is | |
1611 | * possible that we cannot find this viewer stream. | |
1612 | * Reply back to the client with an error if we cannot | |
1613 | * find it. | |
1614 | */ | |
1615 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); | |
7591bab1 | 1616 | goto send_reply; |
d3e2ba59 | 1617 | } |
7591bab1 MD |
1618 | pthread_mutex_lock(&vstream->stream->lock); |
1619 | if (!vstream->stream->is_metadata) { | |
1620 | ERR("Invalid metadata stream"); | |
6763619c JD |
1621 | goto error; |
1622 | } | |
1623 | ||
7591bab1 | 1624 | assert(vstream->metadata_sent <= vstream->stream->metadata_received); |
2a174661 | 1625 | |
7591bab1 | 1626 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
d3e2ba59 | 1627 | if (len == 0) { |
c4e361a4 | 1628 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1629 | goto send_reply; |
1630 | } | |
1631 | ||
1632 | /* first time, we open the metadata file */ | |
7591bab1 | 1633 | if (!vstream->stream_fd) { |
d3e2ba59 JD |
1634 | char fullpath[PATH_MAX]; |
1635 | ||
7591bab1 MD |
1636 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", vstream->path_name, |
1637 | vstream->channel_name); | |
d3e2ba59 JD |
1638 | if (ret < 0) { |
1639 | goto error; | |
1640 | } | |
1641 | ret = open(fullpath, O_RDONLY); | |
1642 | if (ret < 0) { | |
1643 | PERROR("Relay opening metadata file"); | |
1644 | goto error; | |
1645 | } | |
7591bab1 MD |
1646 | vstream->stream_fd = stream_fd_create(ret); |
1647 | if (!vstream->stream_fd) { | |
1648 | if (close(ret)) { | |
1649 | PERROR("close"); | |
1650 | } | |
1651 | goto error; | |
1652 | } | |
d3e2ba59 JD |
1653 | } |
1654 | ||
1655 | reply.len = htobe64(len); | |
1656 | data = zmalloc(len); | |
1657 | if (!data) { | |
1658 | PERROR("viewer metadata zmalloc"); | |
1659 | goto error; | |
1660 | } | |
1661 | ||
7591bab1 | 1662 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1663 | if (read_len < len) { |
d3e2ba59 JD |
1664 | PERROR("Relay reading metadata file"); |
1665 | goto error; | |
1666 | } | |
7591bab1 MD |
1667 | vstream->metadata_sent += read_len; |
1668 | if (vstream->metadata_sent == vstream->stream->metadata_received | |
1669 | && vstream->stream->closed) { | |
1670 | /* Release ownership for the viewer metadata stream. */ | |
1671 | viewer_stream_put(vstream); | |
1672 | } | |
1673 | ||
c4e361a4 | 1674 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
7591bab1 | 1675 | |
d3e2ba59 JD |
1676 | goto send_reply; |
1677 | ||
1678 | error: | |
c4e361a4 | 1679 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1680 | |
1681 | send_reply: | |
eea7556c | 1682 | health_code_update(); |
7591bab1 MD |
1683 | if (vstream) { |
1684 | pthread_mutex_unlock(&vstream->stream->lock); | |
1685 | } | |
58eb9381 | 1686 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1687 | if (ret < 0) { |
7591bab1 | 1688 | goto end_free; |
d3e2ba59 | 1689 | } |
eea7556c | 1690 | health_code_update(); |
d3e2ba59 JD |
1691 | |
1692 | if (len > 0) { | |
58eb9381 | 1693 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1694 | if (ret < 0) { |
7591bab1 | 1695 | goto end_free; |
d3e2ba59 JD |
1696 | } |
1697 | } | |
1698 | ||
1699 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1700 | be64toh(request.stream_id)); | |
1701 | ||
1702 | DBG("Metadata sent"); | |
1703 | ||
7591bab1 | 1704 | end_free: |
d3e2ba59 | 1705 | free(data); |
d3e2ba59 | 1706 | end: |
7591bab1 MD |
1707 | if (vstream) { |
1708 | viewer_stream_put(vstream); | |
1709 | } | |
d3e2ba59 JD |
1710 | return ret; |
1711 | } | |
1712 | ||
c3b7390b JD |
1713 | /* |
1714 | * Create a viewer session. | |
1715 | * | |
1716 | * Return 0 on success or else a negative value. | |
1717 | */ | |
1718 | static | |
1719 | int viewer_create_session(struct relay_connection *conn) | |
1720 | { | |
1721 | int ret; | |
1722 | struct lttng_viewer_create_session_response resp; | |
1723 | ||
1724 | DBG("Viewer create session received"); | |
1725 | ||
53efb85a | 1726 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1727 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
7591bab1 | 1728 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
1729 | if (!conn->viewer_session) { |
1730 | ERR("Allocation viewer session"); | |
1731 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1732 | goto send_reply; | |
1733 | } | |
c3b7390b JD |
1734 | |
1735 | send_reply: | |
1736 | health_code_update(); | |
1737 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1738 | if (ret < 0) { | |
1739 | goto end; | |
1740 | } | |
1741 | health_code_update(); | |
1742 | ret = 0; | |
1743 | ||
1744 | end: | |
1745 | return ret; | |
1746 | } | |
1747 | ||
1748 | ||
d3e2ba59 JD |
1749 | /* |
1750 | * live_relay_unknown_command: send -1 if received unknown command | |
1751 | */ | |
1752 | static | |
58eb9381 | 1753 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1754 | { |
1755 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1756 | |
53efb85a | 1757 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1758 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1759 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1760 | } |
1761 | ||
1762 | /* | |
1763 | * Process the commands received on the control socket | |
1764 | */ | |
1765 | static | |
1766 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1767 | struct relay_connection *conn) |
d3e2ba59 JD |
1768 | { |
1769 | int ret = 0; | |
2f8f53af DG |
1770 | uint32_t msg_value; |
1771 | ||
2f8f53af DG |
1772 | msg_value = be32toh(recv_hdr->cmd); |
1773 | ||
1774 | /* | |
1775 | * Make sure we've done the version check before any command other then a | |
1776 | * new client connection. | |
1777 | */ | |
c4e361a4 | 1778 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1779 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1780 | ret = -1; |
1781 | goto end; | |
1782 | } | |
d3e2ba59 | 1783 | |
2f8f53af | 1784 | switch (msg_value) { |
c4e361a4 | 1785 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1786 | ret = viewer_connect(conn); |
d3e2ba59 | 1787 | break; |
c4e361a4 | 1788 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1789 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1790 | break; |
c4e361a4 | 1791 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1792 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1793 | break; |
c4e361a4 | 1794 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1795 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1796 | break; |
c4e361a4 | 1797 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1798 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1799 | break; |
c4e361a4 | 1800 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1801 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1802 | break; |
c4e361a4 | 1803 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1804 | ret = viewer_get_new_streams(conn); |
80e8027a | 1805 | break; |
c3b7390b JD |
1806 | case LTTNG_VIEWER_CREATE_SESSION: |
1807 | ret = viewer_create_session(conn); | |
1808 | break; | |
d3e2ba59 | 1809 | default: |
7591bab1 MD |
1810 | ERR("Received unknown viewer command (%u)", |
1811 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 1812 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1813 | ret = -1; |
1814 | goto end; | |
1815 | } | |
1816 | ||
1817 | end: | |
1818 | return ret; | |
1819 | } | |
1820 | ||
1821 | static | |
58eb9381 | 1822 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1823 | { |
1824 | int ret; | |
1825 | ||
58eb9381 | 1826 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1827 | |
1828 | ret = close(pollfd); | |
1829 | if (ret < 0) { | |
1830 | ERR("Closing pollfd %d", pollfd); | |
1831 | } | |
1832 | } | |
1833 | ||
d3e2ba59 JD |
1834 | /* |
1835 | * This thread does the actual work | |
1836 | */ | |
1837 | static | |
1838 | void *thread_worker(void *data) | |
1839 | { | |
1840 | int ret, err = -1; | |
1841 | uint32_t nb_fd; | |
d3e2ba59 | 1842 | struct lttng_poll_event events; |
7591bab1 | 1843 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
1844 | struct lttng_ht_iter iter; |
1845 | struct lttng_viewer_cmd recv_hdr; | |
302d8906 | 1846 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
1847 | |
1848 | DBG("[thread] Live viewer relay worker started"); | |
1849 | ||
1850 | rcu_register_thread(); | |
1851 | ||
eea7556c MD |
1852 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1853 | ||
9b5e0863 MD |
1854 | if (testpoint(relayd_thread_live_worker)) { |
1855 | goto error_testpoint; | |
1856 | } | |
1857 | ||
d3e2ba59 | 1858 | /* table of connections indexed on socket */ |
7591bab1 MD |
1859 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1860 | if (!viewer_connections_ht) { | |
1861 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
1862 | } |
1863 | ||
1864 | ret = create_thread_poll_set(&events, 2); | |
1865 | if (ret < 0) { | |
1866 | goto error_poll_create; | |
1867 | } | |
1868 | ||
58eb9381 | 1869 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1870 | if (ret < 0) { |
1871 | goto error; | |
1872 | } | |
1873 | ||
1874 | restart: | |
1875 | while (1) { | |
1876 | int i; | |
1877 | ||
eea7556c MD |
1878 | health_code_update(); |
1879 | ||
d3e2ba59 JD |
1880 | /* Infinite blocking call, waiting for transmission */ |
1881 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1882 | health_poll_entry(); |
d3e2ba59 | 1883 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1884 | health_poll_exit(); |
d3e2ba59 JD |
1885 | if (ret < 0) { |
1886 | /* | |
1887 | * Restart interrupted system call. | |
1888 | */ | |
1889 | if (errno == EINTR) { | |
1890 | goto restart; | |
1891 | } | |
1892 | goto error; | |
1893 | } | |
1894 | ||
1895 | nb_fd = ret; | |
1896 | ||
1897 | /* | |
1898 | * Process control. The control connection is prioritised so we don't | |
1899 | * starve it with high throughput tracing data on the data | |
1900 | * connection. | |
1901 | */ | |
1902 | for (i = 0; i < nb_fd; i++) { | |
1903 | /* Fetch once the poll data */ | |
1904 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1905 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1906 | ||
eea7556c MD |
1907 | health_code_update(); |
1908 | ||
fd20dac9 MD |
1909 | if (!revents) { |
1910 | /* No activity for this FD (poll implementation). */ | |
1911 | continue; | |
1912 | } | |
1913 | ||
d3e2ba59 | 1914 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 1915 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
1916 | if (ret) { |
1917 | err = 0; | |
1918 | goto exit; | |
1919 | } | |
1920 | ||
7591bab1 | 1921 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 1922 | if (pollfd == live_conn_pipe[0]) { |
d3e2ba59 JD |
1923 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1924 | ERR("Relay live pipe error"); | |
1925 | goto error; | |
1926 | } else if (revents & LPOLLIN) { | |
302d8906 JG |
1927 | struct relay_connection *conn; |
1928 | ||
7591bab1 MD |
1929 | ret = lttng_read(live_conn_pipe[0], |
1930 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
1931 | if (ret < 0) { |
1932 | goto error; | |
1933 | } | |
58eb9381 DG |
1934 | lttng_poll_add(&events, conn->sock->fd, |
1935 | LPOLLIN | LPOLLRDHUP); | |
7591bab1 MD |
1936 | connection_ht_add(viewer_connections_ht, conn); |
1937 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
d3e2ba59 | 1938 | } |
58eb9381 | 1939 | } else { |
7591bab1 | 1940 | /* Connection activity. */ |
302d8906 JG |
1941 | struct relay_connection *conn; |
1942 | ||
7591bab1 MD |
1943 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
1944 | if (!conn) { | |
1945 | continue; | |
1946 | } | |
58eb9381 DG |
1947 | |
1948 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1949 | cleanup_connection_pollfd(&events, pollfd); | |
7591bab1 MD |
1950 | /* Put "create" ownership reference. */ |
1951 | connection_put(conn); | |
d3e2ba59 | 1952 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
1953 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
1954 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 1955 | if (ret <= 0) { |
7591bab1 | 1956 | /* Connection closed. */ |
58eb9381 | 1957 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
1958 | /* Put "create" ownership reference. */ |
1959 | connection_put(conn); | |
58eb9381 | 1960 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 1961 | } else { |
58eb9381 | 1962 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
1963 | if (ret < 0) { |
1964 | /* Clear the session on error. */ | |
58eb9381 | 1965 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
1966 | /* Put "create" ownership reference. */ |
1967 | connection_put(conn); | |
d3e2ba59 JD |
1968 | DBG("Viewer connection closed with %d", pollfd); |
1969 | } | |
1970 | } | |
1971 | } | |
7591bab1 MD |
1972 | /* Put local "get_by_sock" reference. */ |
1973 | connection_put(conn); | |
d3e2ba59 JD |
1974 | } |
1975 | } | |
1976 | } | |
1977 | ||
1978 | exit: | |
1979 | error: | |
1980 | lttng_poll_clean(&events); | |
1981 | ||
58eb9381 | 1982 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 1983 | rcu_read_lock(); |
7591bab1 | 1984 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
302d8906 | 1985 | destroy_conn, |
58eb9381 | 1986 | sock_n.node) { |
eea7556c | 1987 | health_code_update(); |
7591bab1 | 1988 | connection_put(destroy_conn); |
d3e2ba59 JD |
1989 | } |
1990 | rcu_read_unlock(); | |
1991 | error_poll_create: | |
7591bab1 MD |
1992 | lttng_ht_destroy(viewer_connections_ht); |
1993 | viewer_connections_ht_error: | |
58eb9381 DG |
1994 | /* Close relay conn pipes */ |
1995 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
1996 | if (err) { |
1997 | DBG("Viewer worker thread exited with error"); | |
1998 | } | |
1999 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2000 | error_testpoint: |
eea7556c MD |
2001 | if (err) { |
2002 | health_error(); | |
2003 | ERR("Health error occurred in %s", __func__); | |
2004 | } | |
2005 | health_unregister(health_relayd); | |
b4aacfdc MD |
2006 | if (lttng_relay_stop_threads()) { |
2007 | ERR("Error stopping threads"); | |
178a0557 | 2008 | } |
d3e2ba59 JD |
2009 | rcu_unregister_thread(); |
2010 | return NULL; | |
2011 | } | |
2012 | ||
2013 | /* | |
2014 | * Create the relay command pipe to wake thread_manage_apps. | |
2015 | * Closed in cleanup(). | |
2016 | */ | |
58eb9381 | 2017 | static int create_conn_pipe(void) |
d3e2ba59 | 2018 | { |
178a0557 MD |
2019 | return utils_create_pipe_cloexec(live_conn_pipe); |
2020 | } | |
d3e2ba59 | 2021 | |
178a0557 | 2022 | int relayd_live_join(void) |
d3e2ba59 | 2023 | { |
178a0557 | 2024 | int ret, retval = 0; |
d3e2ba59 JD |
2025 | void *status; |
2026 | ||
d3e2ba59 | 2027 | ret = pthread_join(live_listener_thread, &status); |
178a0557 MD |
2028 | if (ret) { |
2029 | errno = ret; | |
d3e2ba59 | 2030 | PERROR("pthread_join live listener"); |
178a0557 | 2031 | retval = -1; |
d3e2ba59 JD |
2032 | } |
2033 | ||
2034 | ret = pthread_join(live_worker_thread, &status); | |
178a0557 MD |
2035 | if (ret) { |
2036 | errno = ret; | |
d3e2ba59 | 2037 | PERROR("pthread_join live worker"); |
178a0557 | 2038 | retval = -1; |
d3e2ba59 JD |
2039 | } |
2040 | ||
2041 | ret = pthread_join(live_dispatcher_thread, &status); | |
178a0557 MD |
2042 | if (ret) { |
2043 | errno = ret; | |
d3e2ba59 | 2044 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2045 | retval = -1; |
d3e2ba59 JD |
2046 | } |
2047 | ||
178a0557 | 2048 | cleanup_relayd_live(); |
d3e2ba59 | 2049 | |
178a0557 | 2050 | return retval; |
d3e2ba59 JD |
2051 | } |
2052 | ||
2053 | /* | |
2054 | * main | |
2055 | */ | |
7591bab1 | 2056 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2057 | { |
178a0557 | 2058 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2059 | void *status; |
2060 | int is_root; | |
2061 | ||
178a0557 MD |
2062 | if (!uri) { |
2063 | retval = -1; | |
2064 | goto exit_init_data; | |
2065 | } | |
d3e2ba59 JD |
2066 | live_uri = uri; |
2067 | ||
d3e2ba59 JD |
2068 | /* Check if daemon is UID = 0 */ |
2069 | is_root = !getuid(); | |
2070 | ||
2071 | if (!is_root) { | |
2072 | if (live_uri->port < 1024) { | |
2073 | ERR("Need to be root to use ports < 1024"); | |
178a0557 MD |
2074 | retval = -1; |
2075 | goto exit_init_data; | |
d3e2ba59 JD |
2076 | } |
2077 | } | |
2078 | ||
2079 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2080 | if (create_conn_pipe()) { |
2081 | retval = -1; | |
2082 | goto exit_init_data; | |
d3e2ba59 JD |
2083 | } |
2084 | ||
2085 | /* Init relay command queue. */ | |
8bdee6e2 | 2086 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2087 | |
2088 | /* Set up max poll set size */ | |
25b397f9 MD |
2089 | if (lttng_poll_set_max_size()) { |
2090 | retval = -1; | |
2091 | goto exit_init_data; | |
2092 | } | |
d3e2ba59 JD |
2093 | |
2094 | /* Setup the dispatcher thread */ | |
2095 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2096 | thread_dispatcher, (void *) NULL); | |
178a0557 MD |
2097 | if (ret) { |
2098 | errno = ret; | |
d3e2ba59 | 2099 | PERROR("pthread_create viewer dispatcher"); |
178a0557 MD |
2100 | retval = -1; |
2101 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2102 | } |
2103 | ||
2104 | /* Setup the worker thread */ | |
2105 | ret = pthread_create(&live_worker_thread, NULL, | |
7591bab1 | 2106 | thread_worker, NULL); |
178a0557 MD |
2107 | if (ret) { |
2108 | errno = ret; | |
d3e2ba59 | 2109 | PERROR("pthread_create viewer worker"); |
178a0557 MD |
2110 | retval = -1; |
2111 | goto exit_worker_thread; | |
d3e2ba59 JD |
2112 | } |
2113 | ||
2114 | /* Setup the listener thread */ | |
2115 | ret = pthread_create(&live_listener_thread, NULL, | |
2116 | thread_listener, (void *) NULL); | |
178a0557 MD |
2117 | if (ret) { |
2118 | errno = ret; | |
d3e2ba59 | 2119 | PERROR("pthread_create viewer listener"); |
178a0557 MD |
2120 | retval = -1; |
2121 | goto exit_listener_thread; | |
d3e2ba59 JD |
2122 | } |
2123 | ||
178a0557 MD |
2124 | /* |
2125 | * All OK, started all threads. | |
2126 | */ | |
2127 | return retval; | |
2128 | ||
9911d21b JG |
2129 | /* |
2130 | * Join on the live_listener_thread should anything be added after | |
2131 | * the live_listener thread's creation. | |
2132 | */ | |
d3e2ba59 | 2133 | |
178a0557 | 2134 | exit_listener_thread: |
d3e2ba59 | 2135 | |
d3e2ba59 | 2136 | ret = pthread_join(live_worker_thread, &status); |
178a0557 MD |
2137 | if (ret) { |
2138 | errno = ret; | |
d3e2ba59 | 2139 | PERROR("pthread_join live worker"); |
178a0557 | 2140 | retval = -1; |
d3e2ba59 | 2141 | } |
178a0557 | 2142 | exit_worker_thread: |
d3e2ba59 | 2143 | |
d3e2ba59 | 2144 | ret = pthread_join(live_dispatcher_thread, &status); |
178a0557 MD |
2145 | if (ret) { |
2146 | errno = ret; | |
d3e2ba59 | 2147 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2148 | retval = -1; |
d3e2ba59 | 2149 | } |
178a0557 | 2150 | exit_dispatcher_thread: |
d3e2ba59 | 2151 | |
178a0557 MD |
2152 | exit_init_data: |
2153 | cleanup_relayd_live(); | |
d3e2ba59 | 2154 | |
178a0557 | 2155 | return retval; |
d3e2ba59 | 2156 | } |