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> | |
9a78c92e | 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 | |
21 | #include <getopt.h> | |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
24 | #include <pthread.h> | |
25 | #include <signal.h> | |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <sys/mman.h> | |
30 | #include <sys/mount.h> | |
31 | #include <sys/resource.h> | |
32 | #include <sys/socket.h> | |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
35 | #include <sys/wait.h> | |
36 | #include <inttypes.h> | |
37 | #include <urcu/futex.h> | |
38 | #include <urcu/uatomic.h> | |
9a78c92e | 39 | #include <urcu/rculist.h> |
d3e2ba59 JD |
40 | #include <unistd.h> |
41 | #include <fcntl.h> | |
42 | #include <config.h> | |
43 | ||
44 | #include <lttng/lttng.h> | |
45 | #include <common/common.h> | |
46 | #include <common/compat/poll.h> | |
47 | #include <common/compat/socket.h> | |
f263b7fd | 48 | #include <common/compat/endian.h> |
d3e2ba59 JD |
49 | #include <common/defaults.h> |
50 | #include <common/futex.h> | |
2f8f53af | 51 | #include <common/index/index.h> |
d3e2ba59 JD |
52 | #include <common/sessiond-comm/sessiond-comm.h> |
53 | #include <common/sessiond-comm/inet.h> | |
54 | #include <common/sessiond-comm/relayd.h> | |
55 | #include <common/uri.h> | |
56 | #include <common/utils.h> | |
57 | ||
58 | #include "cmd.h" | |
59 | #include "live.h" | |
60 | #include "lttng-relayd.h" | |
d3e2ba59 | 61 | #include "utils.h" |
eea7556c | 62 | #include "health-relayd.h" |
9b5e0863 | 63 | #include "testpoint.h" |
2f8f53af | 64 | #include "viewer-stream.h" |
2a174661 DG |
65 | #include "stream.h" |
66 | #include "session.h" | |
67 | #include "ctf-trace.h" | |
58eb9381 | 68 | #include "connection.h" |
9a78c92e MD |
69 | #include "viewer-session.h" |
70 | ||
71 | #define SESSION_BUF_DEFAULT_COUNT 16 | |
d3e2ba59 JD |
72 | |
73 | static struct lttng_uri *live_uri; | |
74 | ||
d3e2ba59 JD |
75 | /* |
76 | * This pipe is used to inform the worker thread that a command is queued and | |
77 | * ready to be processed. | |
78 | */ | |
58eb9381 | 79 | static int live_conn_pipe[2] = { -1, -1 }; |
d3e2ba59 JD |
80 | |
81 | /* Shared between threads */ | |
82 | static int live_dispatch_thread_exit; | |
83 | ||
84 | static pthread_t live_listener_thread; | |
85 | static pthread_t live_dispatcher_thread; | |
86 | static pthread_t live_worker_thread; | |
87 | ||
88 | /* | |
89 | * Relay command queue. | |
90 | * | |
91 | * The live_thread_listener and live_thread_dispatcher communicate with this | |
92 | * queue. | |
93 | */ | |
58eb9381 | 94 | static struct relay_conn_queue viewer_conn_queue; |
d3e2ba59 JD |
95 | |
96 | static uint64_t last_relay_viewer_session_id; | |
9a78c92e MD |
97 | static pthread_mutex_t last_relay_viewer_session_id_lock = |
98 | PTHREAD_MUTEX_INITIALIZER; | |
d3e2ba59 JD |
99 | |
100 | /* | |
101 | * Cleanup the daemon | |
102 | */ | |
103 | static | |
77c54fed | 104 | void cleanup_relayd_live(void) |
d3e2ba59 JD |
105 | { |
106 | DBG("Cleaning up"); | |
107 | ||
d3e2ba59 JD |
108 | free(live_uri); |
109 | } | |
110 | ||
2f8f53af DG |
111 | /* |
112 | * Receive a request buffer using a given socket, destination allocated buffer | |
113 | * of length size. | |
114 | * | |
115 | * Return the size of the received message or else a negative value on error | |
116 | * with errno being set by recvmsg() syscall. | |
117 | */ | |
118 | static | |
119 | ssize_t recv_request(struct lttcomm_sock *sock, void *buf, size_t size) | |
120 | { | |
121 | ssize_t ret; | |
122 | ||
2f8f53af DG |
123 | ret = sock->ops->recvmsg(sock, buf, size, 0); |
124 | if (ret < 0 || ret != size) { | |
125 | if (ret == 0) { | |
126 | /* Orderly shutdown. Not necessary to print an error. */ | |
127 | DBG("Socket %d did an orderly shutdown", sock->fd); | |
128 | } else { | |
129 | ERR("Relay failed to receive request."); | |
130 | } | |
131 | ret = -1; | |
132 | } | |
133 | ||
134 | return ret; | |
135 | } | |
136 | ||
137 | /* | |
138 | * Send a response buffer using a given socket, source allocated buffer of | |
139 | * length size. | |
140 | * | |
141 | * Return the size of the sent message or else a negative value on error with | |
142 | * errno being set by sendmsg() syscall. | |
143 | */ | |
144 | static | |
145 | ssize_t send_response(struct lttcomm_sock *sock, void *buf, size_t size) | |
146 | { | |
147 | ssize_t ret; | |
148 | ||
2f8f53af DG |
149 | ret = sock->ops->sendmsg(sock, buf, size, 0); |
150 | if (ret < 0) { | |
151 | ERR("Relayd failed to send response."); | |
152 | } | |
153 | ||
154 | return ret; | |
155 | } | |
156 | ||
157 | /* | |
f04a971b JD |
158 | * Atomically check if new streams got added in one of the sessions attached |
159 | * and reset the flag to 0. | |
2f8f53af DG |
160 | * |
161 | * Returns 1 if new streams got added, 0 if nothing changed, a negative value | |
162 | * on error. | |
163 | */ | |
164 | static | |
f04a971b | 165 | int check_new_streams(struct relay_connection *conn) |
2f8f53af | 166 | { |
2f8f53af | 167 | struct relay_session *session; |
f04a971b JD |
168 | unsigned long current_val; |
169 | int ret = 0; | |
2f8f53af | 170 | |
f04a971b JD |
171 | if (!conn->viewer_session) { |
172 | goto end; | |
173 | } | |
9a78c92e MD |
174 | rcu_read_lock(); |
175 | cds_list_for_each_entry_rcu(session, | |
176 | &conn->viewer_session->session_list, | |
177 | viewer_session_node) { | |
178 | if (!session_get(session)) { | |
179 | continue; | |
180 | } | |
f04a971b JD |
181 | current_val = uatomic_cmpxchg(&session->new_streams, 1, 0); |
182 | ret = current_val; | |
9a78c92e | 183 | session_put(session); |
f04a971b JD |
184 | if (ret == 1) { |
185 | goto end; | |
186 | } | |
2f8f53af | 187 | } |
f04a971b | 188 | end: |
9a78c92e | 189 | rcu_read_unlock(); |
2f8f53af DG |
190 | return ret; |
191 | } | |
192 | ||
193 | /* | |
194 | * Send viewer streams to the given socket. The ignore_sent_flag indicates if | |
195 | * this function should ignore the sent flag or not. | |
196 | * | |
197 | * Return 0 on success or else a negative value. | |
198 | */ | |
199 | static | |
200 | ssize_t send_viewer_streams(struct lttcomm_sock *sock, | |
201 | struct relay_session *session, unsigned int ignore_sent_flag) | |
202 | { | |
203 | ssize_t ret; | |
204 | struct lttng_viewer_stream send_stream; | |
205 | struct lttng_ht_iter iter; | |
206 | struct relay_viewer_stream *vstream; | |
207 | ||
2f8f53af DG |
208 | rcu_read_lock(); |
209 | ||
210 | cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, vstream, | |
211 | stream_n.node) { | |
2a174661 DG |
212 | struct ctf_trace *ctf_trace; |
213 | ||
2f8f53af DG |
214 | health_code_update(); |
215 | ||
9a78c92e MD |
216 | if (!viewer_stream_get(vstream)) { |
217 | continue; | |
218 | } | |
219 | ||
220 | pthread_mutex_lock(&vstream->stream->lock); | |
2f8f53af | 221 | /* Ignore if not the same session. */ |
9a78c92e | 222 | if (vstream->stream->trace->session->id != session->id || |
2f8f53af | 223 | (!ignore_sent_flag && vstream->sent_flag)) { |
9a78c92e MD |
224 | pthread_mutex_unlock(&vstream->stream->lock); |
225 | viewer_stream_put(vstream); | |
2f8f53af DG |
226 | continue; |
227 | } | |
228 | ||
9a78c92e MD |
229 | ctf_trace = vstream->stream->trace; |
230 | send_stream.id = htobe64(vstream->stream->stream_handle); | |
2a174661 | 231 | send_stream.ctf_trace_id = htobe64(ctf_trace->id); |
9a78c92e MD |
232 | send_stream.metadata_flag = htobe32( |
233 | vstream->stream->is_metadata); | |
2f8f53af DG |
234 | strncpy(send_stream.path_name, vstream->path_name, |
235 | sizeof(send_stream.path_name)); | |
236 | strncpy(send_stream.channel_name, vstream->channel_name, | |
237 | sizeof(send_stream.channel_name)); | |
238 | ||
9a78c92e MD |
239 | DBG("Sending stream %" PRIu64 " to viewer", |
240 | vstream->stream->stream_handle); | |
241 | vstream->sent_flag = 1; | |
242 | pthread_mutex_unlock(&vstream->stream->lock); | |
243 | ||
2f8f53af | 244 | ret = send_response(sock, &send_stream, sizeof(send_stream)); |
9a78c92e | 245 | viewer_stream_put(vstream); |
2f8f53af DG |
246 | if (ret < 0) { |
247 | goto end_unlock; | |
248 | } | |
2f8f53af DG |
249 | } |
250 | ||
251 | ret = 0; | |
252 | ||
253 | end_unlock: | |
254 | rcu_read_unlock(); | |
255 | return ret; | |
256 | } | |
257 | ||
258 | /* | |
259 | * Create every viewer stream possible for the given session with the seek | |
260 | * type. Three counters *can* be return which are in order the total amount of | |
261 | * viewer stream of the session, the number of unsent stream and the number of | |
262 | * stream created. Those counters can be NULL and thus will be ignored. | |
263 | * | |
264 | * Return 0 on success or else a negative value. | |
265 | */ | |
266 | static | |
267 | int make_viewer_streams(struct relay_session *session, | |
268 | enum lttng_viewer_seek seek_t, uint32_t *nb_total, uint32_t *nb_unsent, | |
11436961 | 269 | uint32_t *nb_created, bool *closed) |
2f8f53af DG |
270 | { |
271 | int ret; | |
2f8f53af | 272 | struct lttng_ht_iter iter; |
2a174661 | 273 | struct ctf_trace *ctf_trace; |
2f8f53af DG |
274 | |
275 | assert(session); | |
276 | ||
277 | /* | |
9a78c92e MD |
278 | * Hold the session lock to ensure that we see either none or |
279 | * all initial streams for a session, but no intermediate state. | |
2f8f53af | 280 | */ |
9a78c92e | 281 | pthread_mutex_lock(&session->lock); |
2f8f53af | 282 | |
11436961 MD |
283 | if (session->connection_closed) { |
284 | *closed = true; | |
285 | } | |
286 | ||
2f8f53af | 287 | /* |
9a78c92e MD |
288 | * Create viewer streams for relay streams that are ready to be |
289 | * used for a the given session id only. | |
2f8f53af | 290 | */ |
2a174661 DG |
291 | rcu_read_lock(); |
292 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
293 | node.node) { | |
294 | struct relay_stream *stream; | |
2f8f53af DG |
295 | |
296 | health_code_update(); | |
297 | ||
9a78c92e | 298 | if (!ctf_trace_get(ctf_trace)) { |
2f8f53af DG |
299 | continue; |
300 | } | |
301 | ||
9a78c92e | 302 | cds_list_for_each_entry_rcu(stream, &ctf_trace->stream_list, stream_node) { |
2a174661 DG |
303 | struct relay_viewer_stream *vstream; |
304 | ||
9a78c92e | 305 | if (!stream_get(stream)) { |
2a174661 DG |
306 | continue; |
307 | } | |
9a78c92e | 308 | /* |
db271c7d | 309 | * stream published is protected by the session lock. |
9a78c92e MD |
310 | */ |
311 | if (!stream->published) { | |
312 | goto next; | |
313 | } | |
314 | vstream = viewer_stream_get_by_id(stream->stream_handle); | |
2f8f53af | 315 | if (!vstream) { |
9a78c92e | 316 | vstream = viewer_stream_create(stream, seek_t); |
2a174661 DG |
317 | if (!vstream) { |
318 | ret = -1; | |
9a78c92e MD |
319 | ctf_trace_put(ctf_trace); |
320 | stream_put(stream); | |
2a174661 DG |
321 | goto error_unlock; |
322 | } | |
2a174661 DG |
323 | |
324 | if (nb_created) { | |
325 | /* Update number of created stream counter. */ | |
326 | (*nb_created)++; | |
327 | } | |
64bda0b4 MD |
328 | /* |
329 | * Ensure a self-reference is preserved even | |
330 | * after we have put our local reference. | |
331 | */ | |
332 | viewer_stream_get(vstream); | |
9a78c92e MD |
333 | } else { |
334 | if (!vstream->sent_flag && nb_unsent) { | |
335 | /* Update number of unsent stream counter. */ | |
336 | (*nb_unsent)++; | |
337 | } | |
2f8f53af | 338 | } |
2a174661 DG |
339 | /* Update number of total stream counter. */ |
340 | if (nb_total) { | |
64bda0b4 MD |
341 | if (stream->is_metadata) { |
342 | if (!stream->closed || | |
343 | stream->metadata_received > vstream->metadata_sent) { | |
344 | (*nb_total)++; | |
345 | } | |
346 | } else { | |
347 | if (!stream->closed || | |
348 | !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
349 | ||
350 | (*nb_total)++; | |
351 | } | |
352 | } | |
2f8f53af | 353 | } |
64bda0b4 MD |
354 | /* Put local reference. */ |
355 | viewer_stream_put(vstream); | |
9a78c92e MD |
356 | next: |
357 | stream_put(stream); | |
2f8f53af | 358 | } |
9a78c92e | 359 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
360 | } |
361 | ||
362 | ret = 0; | |
363 | ||
364 | error_unlock: | |
2a174661 | 365 | rcu_read_unlock(); |
9a78c92e | 366 | pthread_mutex_unlock(&session->lock); |
2f8f53af DG |
367 | return ret; |
368 | } | |
369 | ||
770f96f4 | 370 | int relayd_live_stop(void) |
d3e2ba59 | 371 | { |
770f96f4 | 372 | /* Stop dispatch thread */ |
d3e2ba59 | 373 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 374 | futex_nto1_wake(&viewer_conn_queue.futex); |
770f96f4 | 375 | return 0; |
d3e2ba59 JD |
376 | } |
377 | ||
d3e2ba59 JD |
378 | /* |
379 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
380 | */ | |
381 | static | |
382 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
383 | { | |
384 | int ret; | |
385 | ||
386 | if (events == NULL || size == 0) { | |
387 | ret = -1; | |
388 | goto error; | |
389 | } | |
390 | ||
391 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
392 | if (ret < 0) { | |
393 | goto error; | |
394 | } | |
395 | ||
396 | /* Add quit pipe */ | |
bcf4a440 | 397 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
398 | if (ret < 0) { |
399 | goto error; | |
400 | } | |
401 | ||
402 | return 0; | |
403 | ||
404 | error: | |
405 | return ret; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Check if the thread quit pipe was triggered. | |
410 | * | |
411 | * Return 1 if it was triggered else 0; | |
412 | */ | |
413 | static | |
bcf4a440 | 414 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 415 | { |
bcf4a440 | 416 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
417 | return 1; |
418 | } | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | /* | |
424 | * Create and init socket from uri. | |
425 | */ | |
426 | static | |
427 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
428 | { | |
429 | int ret; | |
430 | struct lttcomm_sock *sock = NULL; | |
431 | ||
432 | sock = lttcomm_alloc_sock_from_uri(uri); | |
433 | if (sock == NULL) { | |
434 | ERR("Allocating socket"); | |
435 | goto error; | |
436 | } | |
437 | ||
438 | ret = lttcomm_create_sock(sock); | |
439 | if (ret < 0) { | |
440 | goto error; | |
441 | } | |
442 | DBG("Listening on sock %d for live", sock->fd); | |
443 | ||
444 | ret = sock->ops->bind(sock); | |
445 | if (ret < 0) { | |
446 | goto error; | |
447 | } | |
448 | ||
449 | ret = sock->ops->listen(sock, -1); | |
450 | if (ret < 0) { | |
451 | goto error; | |
452 | ||
453 | } | |
454 | ||
455 | return sock; | |
456 | ||
457 | error: | |
458 | if (sock) { | |
459 | lttcomm_destroy_sock(sock); | |
460 | } | |
461 | return NULL; | |
462 | } | |
463 | ||
464 | /* | |
465 | * This thread manages the listening for new connections on the network | |
466 | */ | |
467 | static | |
468 | void *thread_listener(void *data) | |
469 | { | |
470 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
471 | uint32_t revents, nb_fd; |
472 | struct lttng_poll_event events; | |
473 | struct lttcomm_sock *live_control_sock; | |
474 | ||
475 | DBG("[thread] Relay live listener started"); | |
476 | ||
eea7556c MD |
477 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
478 | ||
479 | health_code_update(); | |
480 | ||
d3e2ba59 JD |
481 | live_control_sock = init_socket(live_uri); |
482 | if (!live_control_sock) { | |
483 | goto error_sock_control; | |
484 | } | |
485 | ||
fb4d42ab | 486 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
d3e2ba59 JD |
487 | ret = create_thread_poll_set(&events, 2); |
488 | if (ret < 0) { | |
489 | goto error_create_poll; | |
490 | } | |
491 | ||
492 | /* Add the control socket */ | |
493 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
494 | if (ret < 0) { | |
495 | goto error_poll_add; | |
496 | } | |
497 | ||
3fd27398 MD |
498 | lttng_relay_notify_ready(); |
499 | ||
9b5e0863 MD |
500 | if (testpoint(relayd_thread_live_listener)) { |
501 | goto error_testpoint; | |
502 | } | |
503 | ||
d3e2ba59 | 504 | while (1) { |
eea7556c MD |
505 | health_code_update(); |
506 | ||
d3e2ba59 JD |
507 | DBG("Listener accepting live viewers connections"); |
508 | ||
509 | restart: | |
eea7556c | 510 | health_poll_entry(); |
d3e2ba59 | 511 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 512 | health_poll_exit(); |
d3e2ba59 JD |
513 | if (ret < 0) { |
514 | /* | |
515 | * Restart interrupted system call. | |
516 | */ | |
517 | if (errno == EINTR) { | |
518 | goto restart; | |
519 | } | |
520 | goto error; | |
521 | } | |
522 | nb_fd = ret; | |
523 | ||
524 | DBG("Relay new viewer connection received"); | |
525 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
526 | health_code_update(); |
527 | ||
d3e2ba59 JD |
528 | /* Fetch once the poll data */ |
529 | revents = LTTNG_POLL_GETEV(&events, i); | |
530 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
531 | ||
e0077699 MD |
532 | if (!revents) { |
533 | /* No activity for this FD (poll implementation). */ | |
534 | continue; | |
535 | } | |
536 | ||
d3e2ba59 | 537 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 538 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
539 | if (ret) { |
540 | err = 0; | |
541 | goto exit; | |
542 | } | |
543 | ||
544 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
545 | ERR("socket poll error"); | |
546 | goto error; | |
547 | } else if (revents & LPOLLIN) { | |
548 | /* | |
9a78c92e MD |
549 | * A new connection is requested, therefore a |
550 | * viewer connection is allocated in this | |
551 | * thread, enqueued to a global queue and | |
552 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 553 | */ |
58eb9381 DG |
554 | int val = 1; |
555 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
556 | struct lttcomm_sock *newsock; |
557 | ||
d3e2ba59 JD |
558 | newsock = live_control_sock->ops->accept(live_control_sock); |
559 | if (!newsock) { | |
560 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
561 | goto error; |
562 | } | |
563 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 564 | |
d3e2ba59 | 565 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 566 | sizeof(val)); |
d3e2ba59 JD |
567 | if (ret < 0) { |
568 | PERROR("setsockopt inet"); | |
569 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
570 | goto error; |
571 | } | |
9a78c92e MD |
572 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
573 | if (!new_conn) { | |
574 | lttcomm_destroy_sock(newsock); | |
575 | goto error; | |
576 | } | |
577 | /* Ownership assumed by the connection. */ | |
578 | newsock = NULL; | |
d3e2ba59 | 579 | |
58eb9381 | 580 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
581 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
582 | &new_conn->qnode); | |
d3e2ba59 JD |
583 | |
584 | /* | |
9a78c92e MD |
585 | * Wake the dispatch queue futex. |
586 | * Implicit memory barrier with the | |
587 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 588 | */ |
58eb9381 | 589 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
590 | } |
591 | } | |
592 | } | |
593 | ||
594 | exit: | |
595 | error: | |
596 | error_poll_add: | |
9b5e0863 | 597 | error_testpoint: |
d3e2ba59 JD |
598 | lttng_poll_clean(&events); |
599 | error_create_poll: | |
600 | if (live_control_sock->fd >= 0) { | |
601 | ret = live_control_sock->ops->close(live_control_sock); | |
602 | if (ret) { | |
603 | PERROR("close"); | |
604 | } | |
605 | } | |
606 | lttcomm_destroy_sock(live_control_sock); | |
607 | error_sock_control: | |
608 | if (err) { | |
eea7556c | 609 | health_error(); |
d3e2ba59 JD |
610 | DBG("Live viewer listener thread exited with error"); |
611 | } | |
eea7556c | 612 | health_unregister(health_relayd); |
d3e2ba59 | 613 | DBG("Live viewer listener thread cleanup complete"); |
770f96f4 MD |
614 | if (lttng_relay_stop_threads()) { |
615 | ERR("Error stopping threads"); | |
77c54fed | 616 | } |
d3e2ba59 JD |
617 | return NULL; |
618 | } | |
619 | ||
620 | /* | |
621 | * This thread manages the dispatching of the requests to worker threads | |
622 | */ | |
623 | static | |
624 | void *thread_dispatcher(void *data) | |
625 | { | |
6cd525e8 MD |
626 | int err = -1; |
627 | ssize_t ret; | |
8bdee6e2 | 628 | struct cds_wfcq_node *node; |
58eb9381 | 629 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
630 | |
631 | DBG("[thread] Live viewer relay dispatcher started"); | |
632 | ||
eea7556c MD |
633 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
634 | ||
9b5e0863 MD |
635 | if (testpoint(relayd_thread_live_dispatcher)) { |
636 | goto error_testpoint; | |
637 | } | |
638 | ||
eea7556c MD |
639 | health_code_update(); |
640 | ||
d3e2ba59 | 641 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
642 | health_code_update(); |
643 | ||
d3e2ba59 | 644 | /* Atomically prepare the queue futex */ |
58eb9381 | 645 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
646 | |
647 | do { | |
eea7556c MD |
648 | health_code_update(); |
649 | ||
d3e2ba59 | 650 | /* Dequeue commands */ |
8bdee6e2 SM |
651 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
652 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
653 | if (node == NULL) { |
654 | DBG("Woken up but nothing in the live-viewer " | |
655 | "relay command queue"); | |
656 | /* Continue thread execution */ | |
657 | break; | |
658 | } | |
58eb9381 | 659 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 660 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 661 | conn->sock->fd); |
d3e2ba59 JD |
662 | |
663 | /* | |
9a78c92e MD |
664 | * Inform worker thread of the new request. This |
665 | * call is blocking so we can be assured that | |
666 | * the data will be read at some point in time | |
667 | * or wait to the end of the world :) | |
d3e2ba59 | 668 | */ |
58eb9381 DG |
669 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
670 | if (ret < 0) { | |
671 | PERROR("write conn pipe"); | |
9a78c92e | 672 | connection_put(conn); |
d3e2ba59 JD |
673 | goto error; |
674 | } | |
675 | } while (node != NULL); | |
676 | ||
677 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 678 | health_poll_entry(); |
58eb9381 | 679 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 680 | health_poll_exit(); |
d3e2ba59 JD |
681 | } |
682 | ||
eea7556c MD |
683 | /* Normal exit, no error */ |
684 | err = 0; | |
685 | ||
d3e2ba59 | 686 | error: |
9b5e0863 | 687 | error_testpoint: |
eea7556c MD |
688 | if (err) { |
689 | health_error(); | |
690 | ERR("Health error occurred in %s", __func__); | |
691 | } | |
692 | health_unregister(health_relayd); | |
d3e2ba59 | 693 | DBG("Live viewer dispatch thread dying"); |
770f96f4 MD |
694 | if (lttng_relay_stop_threads()) { |
695 | ERR("Error stopping threads"); | |
77c54fed | 696 | } |
d3e2ba59 JD |
697 | return NULL; |
698 | } | |
699 | ||
700 | /* | |
701 | * Establish connection with the viewer and check the versions. | |
702 | * | |
703 | * Return 0 on success or else negative value. | |
704 | */ | |
705 | static | |
58eb9381 | 706 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
707 | { |
708 | int ret; | |
709 | struct lttng_viewer_connect reply, msg; | |
710 | ||
58eb9381 | 711 | conn->version_check_done = 1; |
d3e2ba59 | 712 | |
eea7556c MD |
713 | health_code_update(); |
714 | ||
2f8f53af DG |
715 | DBG("Viewer is establishing a connection to the relayd."); |
716 | ||
58eb9381 | 717 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 718 | if (ret < 0) { |
d3e2ba59 JD |
719 | goto end; |
720 | } | |
721 | ||
eea7556c MD |
722 | health_code_update(); |
723 | ||
f46b2ce6 | 724 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
725 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
726 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
727 | ||
728 | /* Major versions must be the same */ | |
729 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
730 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
731 | reply.major, be32toh(msg.major)); | |
72180669 | 732 | ret = -1; |
d3e2ba59 JD |
733 | goto end; |
734 | } | |
735 | ||
58eb9381 | 736 | conn->major = reply.major; |
d3e2ba59 JD |
737 | /* We adapt to the lowest compatible version */ |
738 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 739 | conn->minor = reply.minor; |
d3e2ba59 | 740 | } else { |
58eb9381 | 741 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
742 | } |
743 | ||
c4e361a4 | 744 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 745 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 746 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 747 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
748 | } else { |
749 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
750 | ret = -1; | |
751 | goto end; | |
752 | } | |
753 | ||
754 | reply.major = htobe32(reply.major); | |
755 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 756 | if (conn->type == RELAY_VIEWER_COMMAND) { |
19eba299 | 757 | /* |
9a78c92e MD |
758 | * Increment outside of htobe64 macro, because the argument can |
759 | * be used more than once within the macro, and thus the | |
760 | * operation may be undefined. | |
19eba299 | 761 | */ |
9a78c92e | 762 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
19eba299 | 763 | last_relay_viewer_session_id++; |
9a78c92e | 764 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
19eba299 | 765 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 766 | } |
eea7556c MD |
767 | |
768 | health_code_update(); | |
769 | ||
58eb9381 | 770 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 771 | if (ret < 0) { |
2f8f53af | 772 | goto end; |
d3e2ba59 JD |
773 | } |
774 | ||
eea7556c MD |
775 | health_code_update(); |
776 | ||
58eb9381 | 777 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
778 | ret = 0; |
779 | ||
780 | end: | |
781 | return ret; | |
782 | } | |
783 | ||
784 | /* | |
785 | * Send the viewer the list of current sessions. | |
9a78c92e MD |
786 | * We need to create a copy of the hash table content because otherwise |
787 | * we cannot assume the number of entries stays the same between getting | |
788 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
789 | * |
790 | * Return 0 on success or else a negative value. | |
791 | */ | |
792 | static | |
58eb9381 | 793 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
794 | { |
795 | int ret; | |
796 | struct lttng_viewer_list_sessions session_list; | |
d3e2ba59 | 797 | struct lttng_ht_iter iter; |
d3e2ba59 | 798 | struct relay_session *session; |
9a78c92e MD |
799 | struct lttng_viewer_session *send_session_buf = NULL; |
800 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
801 | uint32_t count = 0; | |
d3e2ba59 JD |
802 | |
803 | DBG("List sessions received"); | |
804 | ||
9a78c92e MD |
805 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
806 | if (!send_session_buf) { | |
807 | return -1; | |
d3e2ba59 JD |
808 | } |
809 | ||
9a78c92e MD |
810 | rcu_read_lock(); |
811 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 812 | session_n.node) { |
9a78c92e | 813 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 814 | |
eea7556c MD |
815 | health_code_update(); |
816 | ||
9a78c92e MD |
817 | if (count >= buf_count) { |
818 | struct lttng_viewer_session *newbuf; | |
819 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 820 | |
9a78c92e MD |
821 | newbuf = realloc(send_session_buf, |
822 | new_buf_count * sizeof(*send_session_buf)); | |
823 | if (!newbuf) { | |
824 | ret = -1; | |
825 | rcu_read_unlock(); | |
826 | goto end_free; | |
827 | } | |
828 | send_session_buf = newbuf; | |
829 | buf_count = new_buf_count; | |
6763619c | 830 | } |
9a78c92e MD |
831 | send_session = &send_session_buf[count]; |
832 | strncpy(send_session->session_name, session->session_name, | |
833 | sizeof(send_session->session_name)); | |
834 | strncpy(send_session->hostname, session->hostname, | |
835 | sizeof(send_session->hostname)); | |
836 | send_session->id = htobe64(session->id); | |
837 | send_session->live_timer = htobe32(session->live_timer); | |
838 | if (session->viewer_attached) { | |
839 | send_session->clients = htobe32(1); | |
840 | } else { | |
841 | send_session->clients = htobe32(0); | |
d227d5bd | 842 | } |
9a78c92e MD |
843 | send_session->streams = htobe32(session->stream_count); |
844 | count++; | |
845 | } | |
846 | rcu_read_unlock(); | |
d227d5bd | 847 | |
9a78c92e | 848 | session_list.sessions_count = htobe32(count); |
d227d5bd | 849 | |
9a78c92e | 850 | health_code_update(); |
d227d5bd | 851 | |
9a78c92e MD |
852 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
853 | if (ret < 0) { | |
854 | goto end_free; | |
d227d5bd | 855 | } |
d227d5bd | 856 | |
9a78c92e | 857 | health_code_update(); |
d227d5bd | 858 | |
9a78c92e MD |
859 | ret = send_response(conn->sock, send_session_buf, |
860 | count * sizeof(*send_session_buf)); | |
861 | if (ret < 0) { | |
862 | goto end_free; | |
d227d5bd | 863 | } |
9a78c92e | 864 | health_code_update(); |
d227d5bd | 865 | |
9a78c92e MD |
866 | ret = 0; |
867 | end_free: | |
868 | free(send_session_buf); | |
869 | return ret; | |
d227d5bd JD |
870 | } |
871 | ||
80e8027a | 872 | /* |
9a78c92e | 873 | * Send the viewer the list of current streams. |
80e8027a JD |
874 | */ |
875 | static | |
58eb9381 | 876 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
877 | { |
878 | int ret, send_streams = 0; | |
9a78c92e | 879 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
880 | struct lttng_viewer_new_streams_request request; |
881 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 882 | struct relay_session *session; |
6763619c | 883 | uint64_t session_id; |
11436961 | 884 | bool closed = false; |
80e8027a | 885 | |
58eb9381 | 886 | assert(conn); |
80e8027a JD |
887 | |
888 | DBG("Get new streams received"); | |
889 | ||
80e8027a JD |
890 | health_code_update(); |
891 | ||
2f8f53af | 892 | /* Receive the request from the connected client. */ |
58eb9381 | 893 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 894 | if (ret < 0) { |
80e8027a JD |
895 | goto error; |
896 | } | |
6763619c | 897 | session_id = be64toh(request.session_id); |
80e8027a JD |
898 | |
899 | health_code_update(); | |
900 | ||
53efb85a MD |
901 | memset(&response, 0, sizeof(response)); |
902 | ||
9a78c92e | 903 | session = session_get_by_id(session_id); |
2f8f53af | 904 | if (!session) { |
6763619c | 905 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 906 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
907 | goto send_reply; |
908 | } | |
909 | ||
9a78c92e | 910 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
80e8027a | 911 | send_streams = 0; |
c4e361a4 | 912 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
913 | goto send_reply; |
914 | } | |
915 | ||
6763619c JD |
916 | send_streams = 1; |
917 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
918 | ||
9a78c92e | 919 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
11436961 | 920 | &nb_created, &closed); |
2f8f53af | 921 | if (ret < 0) { |
9a78c92e | 922 | goto end_put_session; |
2f8f53af DG |
923 | } |
924 | /* Only send back the newly created streams with the unsent ones. */ | |
925 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
926 | response.streams_count = htobe32(nb_streams); |
927 | ||
4479f682 | 928 | /* |
64bda0b4 MD |
929 | * If the session is closed, HUP when there are no more streams |
930 | * with data. | |
4479f682 | 931 | */ |
11436961 | 932 | if (closed && nb_total == 0) { |
4479f682 | 933 | send_streams = 0; |
11436961 | 934 | response.streams_count = 0; |
4479f682 JD |
935 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
936 | goto send_reply; | |
937 | } | |
938 | ||
80e8027a JD |
939 | send_reply: |
940 | health_code_update(); | |
58eb9381 | 941 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 942 | if (ret < 0) { |
9a78c92e | 943 | goto end_put_session; |
80e8027a JD |
944 | } |
945 | health_code_update(); | |
946 | ||
947 | /* | |
9a78c92e MD |
948 | * Unknown or empty session, just return gracefully, the viewer |
949 | * knows what is happening. | |
80e8027a JD |
950 | */ |
951 | if (!send_streams || !nb_streams) { | |
952 | ret = 0; | |
9a78c92e | 953 | goto end_put_session; |
80e8027a JD |
954 | } |
955 | ||
2f8f53af | 956 | /* |
9a78c92e MD |
957 | * Send stream and *DON'T* ignore the sent flag so every viewer |
958 | * streams that were not sent from that point will be sent to | |
959 | * the viewer. | |
2f8f53af | 960 | */ |
58eb9381 | 961 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af | 962 | if (ret < 0) { |
9a78c92e | 963 | goto end_put_session; |
80e8027a JD |
964 | } |
965 | ||
9a78c92e MD |
966 | end_put_session: |
967 | if (session) { | |
968 | session_put(session); | |
969 | } | |
80e8027a JD |
970 | error: |
971 | return ret; | |
972 | } | |
973 | ||
d3e2ba59 JD |
974 | /* |
975 | * Send the viewer the list of current sessions. | |
976 | */ | |
977 | static | |
58eb9381 | 978 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 979 | { |
2f8f53af DG |
980 | int send_streams = 0; |
981 | ssize_t ret; | |
80e8027a | 982 | uint32_t nb_streams = 0; |
2f8f53af | 983 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
984 | struct lttng_viewer_attach_session_request request; |
985 | struct lttng_viewer_attach_session_response response; | |
9a78c92e | 986 | struct relay_session *session = NULL; |
11436961 | 987 | bool closed = false; |
d3e2ba59 | 988 | |
58eb9381 | 989 | assert(conn); |
d3e2ba59 | 990 | |
eea7556c MD |
991 | health_code_update(); |
992 | ||
2f8f53af | 993 | /* Receive the request from the connected client. */ |
58eb9381 | 994 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 995 | if (ret < 0) { |
d3e2ba59 JD |
996 | goto error; |
997 | } | |
998 | ||
eea7556c MD |
999 | health_code_update(); |
1000 | ||
53efb85a MD |
1001 | memset(&response, 0, sizeof(response)); |
1002 | ||
c3b7390b JD |
1003 | if (!conn->viewer_session) { |
1004 | DBG("Client trying to attach before creating a live viewer session"); | |
1005 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1006 | goto send_reply; | |
1007 | } | |
1008 | ||
9a78c92e | 1009 | session = session_get_by_id(be64toh(request.session_id)); |
2f8f53af | 1010 | if (!session) { |
d3e2ba59 JD |
1011 | DBG("Relay session %" PRIu64 " not found", |
1012 | be64toh(request.session_id)); | |
c4e361a4 | 1013 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1014 | goto send_reply; |
1015 | } | |
9a78c92e MD |
1016 | DBG("Attach session ID %" PRIu64 " received", |
1017 | be64toh(request.session_id)); | |
d3e2ba59 | 1018 | |
9a78c92e | 1019 | if (session->live_timer == 0) { |
d3e2ba59 | 1020 | DBG("Not live session"); |
c4e361a4 | 1021 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1022 | goto send_reply; |
9a78c92e MD |
1023 | } |
1024 | ||
1025 | send_streams = 1; | |
1026 | ret = viewer_session_attach(conn->viewer_session, session); | |
1027 | if (ret) { | |
1028 | DBG("Already a viewer attached"); | |
1029 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); | |
1030 | goto send_reply; | |
d3e2ba59 JD |
1031 | } |
1032 | ||
1033 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1034 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1035 | case LTTNG_VIEWER_SEEK_LAST: | |
9a78c92e | 1036 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1037 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1038 | break; |
1039 | default: | |
1040 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1041 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1042 | send_streams = 0; |
1043 | goto send_reply; | |
1044 | } | |
1045 | ||
11436961 MD |
1046 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, |
1047 | NULL, &closed); | |
2f8f53af | 1048 | if (ret < 0) { |
9a78c92e | 1049 | goto end_put_session; |
d3e2ba59 | 1050 | } |
2f8f53af | 1051 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 | 1052 | |
11436961 MD |
1053 | /* |
1054 | * If the session is closed when the viewer is attaching, it | |
1055 | * means some of the streams may have been concurrently removed, | |
1056 | * so we don't allow the viewer to attach, even if there are | |
1057 | * streams available. | |
1058 | */ | |
1059 | if (closed) { | |
1060 | send_streams = 0; | |
1061 | response.streams_count = 0; | |
1062 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
1063 | goto send_reply; | |
1064 | } | |
1065 | ||
d3e2ba59 | 1066 | send_reply: |
eea7556c | 1067 | health_code_update(); |
58eb9381 | 1068 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1069 | if (ret < 0) { |
9a78c92e | 1070 | goto end_put_session; |
d3e2ba59 | 1071 | } |
eea7556c | 1072 | health_code_update(); |
d3e2ba59 JD |
1073 | |
1074 | /* | |
9a78c92e MD |
1075 | * Unknown or empty session, just return gracefully, the viewer |
1076 | * knows what is happening. | |
d3e2ba59 | 1077 | */ |
157df586 | 1078 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1079 | ret = 0; |
9a78c92e | 1080 | goto end_put_session; |
d3e2ba59 JD |
1081 | } |
1082 | ||
2f8f53af | 1083 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1084 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af | 1085 | if (ret < 0) { |
9a78c92e | 1086 | goto end_put_session; |
d3e2ba59 | 1087 | } |
d3e2ba59 | 1088 | |
9a78c92e MD |
1089 | end_put_session: |
1090 | if (session) { | |
1091 | session_put(session); | |
1092 | } | |
4a9daf17 JD |
1093 | error: |
1094 | return ret; | |
1095 | } | |
1096 | ||
878c34cf DG |
1097 | /* |
1098 | * Open the index file if needed for the given vstream. | |
1099 | * | |
9a78c92e MD |
1100 | * If an index file is successfully opened, the vstream index_fd set with |
1101 | * it. | |
878c34cf DG |
1102 | * |
1103 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
9a78c92e MD |
1104 | * |
1105 | * Called with rstream lock held. | |
878c34cf DG |
1106 | */ |
1107 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1108 | struct relay_stream *rstream) | |
1109 | { | |
1110 | int ret = 0; | |
1111 | ||
9a78c92e | 1112 | if (vstream->index_fd) { |
878c34cf DG |
1113 | goto end; |
1114 | } | |
1115 | ||
1116 | /* | |
9a78c92e | 1117 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1118 | */ |
c00978f1 | 1119 | if (rstream->index_received_seqcount == 0) { |
878c34cf DG |
1120 | ret = -ENOENT; |
1121 | goto end; | |
1122 | } | |
1123 | ret = index_open(vstream->path_name, vstream->channel_name, | |
9a78c92e MD |
1124 | vstream->stream->tracefile_count, |
1125 | vstream->current_tracefile_id); | |
878c34cf | 1126 | if (ret >= 0) { |
9a78c92e MD |
1127 | vstream->index_fd = stream_fd_create(ret); |
1128 | if (!vstream->index_fd) { | |
1129 | if (close(ret)) { | |
1130 | PERROR("close"); | |
1131 | } | |
1132 | ret = -1; | |
1133 | } else { | |
1134 | ret = 0; | |
1135 | } | |
878c34cf DG |
1136 | goto end; |
1137 | } | |
1138 | ||
1139 | end: | |
1140 | return ret; | |
1141 | } | |
1142 | ||
1143 | /* | |
9a78c92e MD |
1144 | * Check the status of the index for the given stream. This function |
1145 | * updates the index structure if needed and can put (close) the vstream | |
1146 | * in the HUP situation. | |
1147 | * | |
1148 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1149 | * that the index has been updated and is ready to be sent to the | |
1150 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1151 | * |
9a78c92e | 1152 | * Called with rstream lock held. |
878c34cf DG |
1153 | */ |
1154 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1155 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1156 | struct lttng_viewer_index *index) | |
1157 | { | |
1158 | int ret; | |
1159 | ||
9a78c92e | 1160 | if (trace->session->connection_closed |
c00978f1 MD |
1161 | && rstream->index_received_seqcount |
1162 | == vstream->index_sent_seqcount) { | |
9a78c92e MD |
1163 | /* Last index sent and session connection is closed. */ |
1164 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1165 | goto hup; | |
1166 | } else if (rstream->beacon_ts_end != -1ULL && | |
c00978f1 MD |
1167 | rstream->index_received_seqcount |
1168 | == vstream->index_sent_seqcount) { | |
9a78c92e MD |
1169 | /* |
1170 | * We've received a synchronization beacon and the last index | |
1171 | * available has been sent, the index for now is inactive. | |
1172 | * | |
1173 | * In this case, we have received a beacon which allows us to | |
1174 | * inform the client of a time interval during which we can | |
1175 | * guarantee that there are no events to read (and never will | |
1176 | * be). | |
1177 | */ | |
1178 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1179 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1180 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
1181 | goto index_ready; | |
c00978f1 MD |
1182 | } else if (rstream->index_received_seqcount |
1183 | == vstream->index_sent_seqcount) { | |
9a78c92e | 1184 | /* |
c00978f1 MD |
1185 | * This checks whether received == sent seqcount. In |
1186 | * this case, we have not received a beacon. Therefore, | |
1187 | * we can only ask the client to retry later. | |
9a78c92e MD |
1188 | */ |
1189 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1190 | goto index_ready; | |
c00978f1 MD |
1191 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
1192 | vstream->current_tracefile_id, | |
1193 | vstream->index_sent_seqcount)) { | |
9a78c92e | 1194 | /* |
c00978f1 MD |
1195 | * The next index we want to send cannot be read either |
1196 | * because we need to perform a rotation, or due to | |
1197 | * the producer having overwritten its trace file. | |
9a78c92e | 1198 | */ |
c00978f1 | 1199 | DBG("Viewer stream %" PRIu64 " rotation", |
9a78c92e MD |
1200 | vstream->stream->stream_handle); |
1201 | ret = viewer_stream_rotate(vstream); | |
1202 | if (ret < 0) { | |
1203 | goto end; | |
1204 | } else if (ret == 1) { | |
1205 | /* EOF across entire stream. */ | |
1206 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1207 | goto hup; | |
1208 | } | |
9a78c92e | 1209 | /* |
c00978f1 MD |
1210 | * If we have been pushed due to overwrite, it |
1211 | * necessarily means there is data that can be read in | |
1212 | * the stream. If we rotated because we reached the end | |
1213 | * of a tracefile, it means the following tracefile | |
1214 | * needs to contain at least one index, else we would | |
1215 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1216 | * viewer. The updated index_sent_seqcount needs to | |
1217 | * point to a readable index entry now. | |
1218 | * | |
1219 | * In the case where we "rotate" on a single file, we | |
1220 | * can end up in a case where the requested index is | |
1221 | * still unavailable. | |
9a78c92e | 1222 | */ |
c00978f1 MD |
1223 | if (rstream->tracefile_count == 1 && |
1224 | !tracefile_array_seq_in_file( | |
1225 | rstream->tfa, | |
1226 | vstream->current_tracefile_id, | |
1227 | vstream->index_sent_seqcount)) { | |
1228 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1229 | goto index_ready; | |
878c34cf | 1230 | } |
c00978f1 MD |
1231 | assert(tracefile_array_seq_in_file(rstream->tfa, |
1232 | vstream->current_tracefile_id, | |
1233 | vstream->index_sent_seqcount)); | |
878c34cf | 1234 | } |
c00978f1 MD |
1235 | /* ret == 0 means successful so we continue. */ |
1236 | ret = 0; | |
9a78c92e | 1237 | end: |
878c34cf DG |
1238 | return ret; |
1239 | ||
1240 | hup: | |
9a78c92e | 1241 | viewer_stream_put(vstream); |
878c34cf DG |
1242 | index_ready: |
1243 | return 1; | |
1244 | } | |
1245 | ||
d3e2ba59 JD |
1246 | /* |
1247 | * Send the next index for a stream. | |
1248 | * | |
1249 | * Return 0 on success or else a negative value. | |
1250 | */ | |
1251 | static | |
58eb9381 | 1252 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1253 | { |
1254 | int ret; | |
878c34cf | 1255 | ssize_t read_ret; |
d3e2ba59 JD |
1256 | struct lttng_viewer_get_next_index request_index; |
1257 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1258 | struct ctf_packet_index packet_index; |
9a78c92e MD |
1259 | struct relay_viewer_stream *vstream = NULL; |
1260 | struct relay_stream *rstream = NULL; | |
1261 | struct ctf_trace *ctf_trace = NULL; | |
1262 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1263 | |
58eb9381 | 1264 | assert(conn); |
d3e2ba59 JD |
1265 | |
1266 | DBG("Viewer get next index"); | |
1267 | ||
9a78c92e | 1268 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1269 | health_code_update(); |
2f8f53af | 1270 | |
58eb9381 | 1271 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1272 | if (ret < 0) { |
d3e2ba59 JD |
1273 | goto end; |
1274 | } | |
eea7556c | 1275 | health_code_update(); |
d3e2ba59 | 1276 | |
9a78c92e | 1277 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1278 | if (!vstream) { |
c00978f1 MD |
1279 | DBG("Client requested index of unknown stream id %" PRIu64, |
1280 | be64toh(request_index.stream_id)); | |
387137a7 MD |
1281 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1282 | goto send_reply; | |
2a174661 DG |
1283 | } |
1284 | ||
9a78c92e MD |
1285 | /* Use back. ref. Protected by refcounts. */ |
1286 | rstream = vstream->stream; | |
1287 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1288 | |
9a78c92e MD |
1289 | /* metadata_viewer_stream may be NULL. */ |
1290 | metadata_viewer_stream = | |
1291 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1292 | |
9a78c92e | 1293 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1294 | |
1295 | /* | |
1296 | * The viewer should not ask for index on metadata stream. | |
1297 | */ | |
9a78c92e | 1298 | if (rstream->is_metadata) { |
c4e361a4 | 1299 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1300 | goto send_reply; |
1301 | } | |
1302 | ||
878c34cf DG |
1303 | /* Try to open an index if one is needed for that stream. */ |
1304 | ret = try_open_index(vstream, rstream); | |
1305 | if (ret < 0) { | |
0e6830aa | 1306 | if (ret == -ENOENT) { |
d3e2ba59 | 1307 | /* |
9a78c92e MD |
1308 | * The index is created only when the first data |
1309 | * packet arrives, it might not be ready at the | |
1310 | * beginning of the session | |
d3e2ba59 | 1311 | */ |
c4e361a4 | 1312 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1313 | } else { |
1314 | /* Unhandled error. */ | |
c4e361a4 | 1315 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1316 | } |
878c34cf | 1317 | goto send_reply; |
d3e2ba59 JD |
1318 | } |
1319 | ||
878c34cf | 1320 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1321 | if (ret < 0) { |
9a78c92e | 1322 | goto error_put; |
878c34cf DG |
1323 | } else if (ret == 1) { |
1324 | /* | |
9a78c92e MD |
1325 | * We have no index to send and check_index_status has populated |
1326 | * viewer_index's status. | |
878c34cf | 1327 | */ |
d3e2ba59 JD |
1328 | goto send_reply; |
1329 | } | |
9a78c92e | 1330 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1331 | assert(!ret); |
d3e2ba59 | 1332 | |
9a78c92e MD |
1333 | /* |
1334 | * vstream->stream_fd may be NULL if it has been closed by | |
1335 | * tracefile rotation, or if we are at the beginning of the | |
1336 | * stream. We open the data stream file here to protect against | |
1337 | * overwrite caused by tracefile rotation (in association with | |
1338 | * unlink performed before overwrite). | |
1339 | */ | |
1340 | if (!vstream->stream_fd) { | |
1341 | char fullpath[PATH_MAX]; | |
1342 | ||
1343 | if (vstream->stream->tracefile_count > 0) { | |
1344 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, | |
1345 | vstream->path_name, | |
1346 | vstream->channel_name, | |
1347 | vstream->current_tracefile_id); | |
1348 | } else { | |
1349 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", | |
1350 | vstream->path_name, | |
1351 | vstream->channel_name); | |
1352 | } | |
1353 | if (ret < 0) { | |
1354 | goto error_put; | |
1355 | } | |
1356 | ret = open(fullpath, O_RDONLY); | |
1357 | if (ret < 0) { | |
1358 | PERROR("Relay opening trace file"); | |
1359 | goto error_put; | |
1360 | } | |
1361 | vstream->stream_fd = stream_fd_create(ret); | |
1362 | if (!vstream->stream_fd) { | |
1363 | if (close(ret)) { | |
1364 | PERROR("close"); | |
1365 | } | |
1366 | goto error_put; | |
1367 | } | |
d3e2ba59 JD |
1368 | } |
1369 | ||
f04a971b | 1370 | ret = check_new_streams(conn); |
4a9daf17 | 1371 | if (ret < 0) { |
9a78c92e MD |
1372 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1373 | goto send_reply; | |
4a9daf17 JD |
1374 | } else if (ret == 1) { |
1375 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1376 | } | |
1377 | ||
9a78c92e | 1378 | read_ret = lttng_read(vstream->index_fd->fd, &packet_index, |
6cd525e8 | 1379 | sizeof(packet_index)); |
9a78c92e MD |
1380 | if (read_ret < sizeof(packet_index)) { |
1381 | ERR("Relay reading index file %d returned %zd", | |
1382 | vstream->index_fd->fd, read_ret); | |
1383 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
6b6b9a5a | 1384 | goto send_reply; |
d3e2ba59 | 1385 | } else { |
c4e361a4 | 1386 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
c00978f1 | 1387 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1388 | } |
1389 | ||
1390 | /* | |
1391 | * Indexes are stored in big endian, no need to switch before sending. | |
1392 | */ | |
9a78c92e MD |
1393 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1394 | rstream->stream_handle, | |
1395 | be64toh(packet_index.offset)); | |
d3e2ba59 JD |
1396 | viewer_index.offset = packet_index.offset; |
1397 | viewer_index.packet_size = packet_index.packet_size; | |
1398 | viewer_index.content_size = packet_index.content_size; | |
1399 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1400 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1401 | viewer_index.events_discarded = packet_index.events_discarded; | |
1402 | viewer_index.stream_id = packet_index.stream_id; | |
1403 | ||
1404 | send_reply: | |
387137a7 MD |
1405 | if (rstream) { |
1406 | pthread_mutex_unlock(&rstream->lock); | |
1407 | } | |
9a78c92e MD |
1408 | |
1409 | if (metadata_viewer_stream) { | |
1410 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1411 | DBG("get next index metadata check: recv %" PRIu64 | |
1412 | " sent %" PRIu64, | |
1413 | metadata_viewer_stream->stream->metadata_received, | |
1414 | metadata_viewer_stream->metadata_sent); | |
1415 | if (!metadata_viewer_stream->stream->metadata_received || | |
1416 | metadata_viewer_stream->stream->metadata_received > | |
1417 | metadata_viewer_stream->metadata_sent) { | |
1418 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1419 | } | |
1420 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1421 | } | |
1422 | ||
d3e2ba59 | 1423 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1424 | health_code_update(); |
2f8f53af | 1425 | |
58eb9381 | 1426 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1427 | if (ret < 0) { |
9a78c92e | 1428 | goto end; |
d3e2ba59 | 1429 | } |
eea7556c | 1430 | health_code_update(); |
d3e2ba59 | 1431 | |
16fa7c98 MD |
1432 | if (vstream) { |
1433 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
c00978f1 | 1434 | vstream->index_sent_seqcount, |
16fa7c98 MD |
1435 | vstream->stream->stream_handle); |
1436 | } | |
d3e2ba59 | 1437 | end: |
9a78c92e MD |
1438 | if (metadata_viewer_stream) { |
1439 | viewer_stream_put(metadata_viewer_stream); | |
1440 | } | |
1441 | if (vstream) { | |
1442 | viewer_stream_put(vstream); | |
1443 | } | |
1444 | return ret; | |
1445 | ||
1446 | error_put: | |
1447 | pthread_mutex_unlock(&rstream->lock); | |
1448 | if (metadata_viewer_stream) { | |
1449 | viewer_stream_put(metadata_viewer_stream); | |
1450 | } | |
1451 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1452 | return ret; |
1453 | } | |
1454 | ||
1455 | /* | |
1456 | * Send the next index for a stream | |
1457 | * | |
1458 | * Return 0 on success or else a negative value. | |
1459 | */ | |
1460 | static | |
58eb9381 | 1461 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1462 | { |
1463 | int ret, send_data = 0; | |
1464 | char *data = NULL; | |
1465 | uint32_t len = 0; | |
1466 | ssize_t read_len; | |
1467 | struct lttng_viewer_get_packet get_packet_info; | |
1468 | struct lttng_viewer_trace_packet reply; | |
9a78c92e | 1469 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 JD |
1470 | |
1471 | DBG2("Relay get data packet"); | |
1472 | ||
eea7556c | 1473 | health_code_update(); |
2f8f53af | 1474 | |
9a78c92e MD |
1475 | ret = recv_request(conn->sock, &get_packet_info, |
1476 | sizeof(get_packet_info)); | |
2f8f53af | 1477 | if (ret < 0) { |
d3e2ba59 JD |
1478 | goto end; |
1479 | } | |
eea7556c | 1480 | health_code_update(); |
d3e2ba59 | 1481 | |
0233a6a5 DG |
1482 | /* From this point on, the error label can be reached. */ |
1483 | memset(&reply, 0, sizeof(reply)); | |
1484 | ||
9a78c92e MD |
1485 | vstream = viewer_stream_get_by_id(be64toh(get_packet_info.stream_id)); |
1486 | if (!vstream) { | |
c00978f1 MD |
1487 | DBG("Client requested packet of unknown stream id %" PRIu64, |
1488 | be64toh(get_packet_info.stream_id)); | |
4da923bd MD |
1489 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1490 | goto send_reply_nolock; | |
d3e2ba59 | 1491 | } |
2a174661 | 1492 | |
9a78c92e | 1493 | pthread_mutex_lock(&vstream->stream->lock); |
4a9daf17 | 1494 | |
d3e2ba59 JD |
1495 | len = be32toh(get_packet_info.len); |
1496 | data = zmalloc(len); | |
1497 | if (!data) { | |
1498 | PERROR("relay data zmalloc"); | |
1499 | goto error; | |
1500 | } | |
1501 | ||
9a78c92e MD |
1502 | ret = lseek(vstream->stream_fd->fd, be64toh(get_packet_info.offset), |
1503 | SEEK_SET); | |
d3e2ba59 | 1504 | if (ret < 0) { |
9a78c92e MD |
1505 | PERROR("lseek fd %d to offset %" PRIu64, vstream->stream_fd->fd, |
1506 | be64toh(get_packet_info.offset)); | |
1507 | goto error; | |
d3e2ba59 | 1508 | } |
9a78c92e | 1509 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1510 | if (read_len < len) { |
9a78c92e MD |
1511 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, |
1512 | vstream->stream_fd->fd, | |
1513 | be64toh(get_packet_info.offset)); | |
1514 | goto error; | |
d3e2ba59 | 1515 | } |
c4e361a4 | 1516 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1517 | reply.len = htobe32(len); |
1518 | send_data = 1; | |
1519 | goto send_reply; | |
1520 | ||
1521 | error: | |
c4e361a4 | 1522 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1523 | |
1524 | send_reply: | |
9a78c92e MD |
1525 | if (vstream) { |
1526 | pthread_mutex_unlock(&vstream->stream->lock); | |
1527 | } | |
1528 | send_reply_nolock: | |
d3e2ba59 | 1529 | reply.flags = htobe32(reply.flags); |
eea7556c MD |
1530 | |
1531 | health_code_update(); | |
2f8f53af | 1532 | |
58eb9381 | 1533 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1534 | if (ret < 0) { |
9a78c92e | 1535 | goto end_free; |
d3e2ba59 | 1536 | } |
eea7556c | 1537 | health_code_update(); |
d3e2ba59 JD |
1538 | |
1539 | if (send_data) { | |
eea7556c | 1540 | health_code_update(); |
58eb9381 | 1541 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1542 | if (ret < 0) { |
9a78c92e | 1543 | goto end_free; |
d3e2ba59 | 1544 | } |
eea7556c | 1545 | health_code_update(); |
d3e2ba59 JD |
1546 | } |
1547 | ||
1548 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1549 | be64toh(get_packet_info.stream_id)); | |
1550 | ||
9a78c92e | 1551 | end_free: |
d3e2ba59 | 1552 | free(data); |
d3e2ba59 | 1553 | end: |
9a78c92e MD |
1554 | if (vstream) { |
1555 | viewer_stream_put(vstream); | |
1556 | } | |
d3e2ba59 JD |
1557 | return ret; |
1558 | } | |
1559 | ||
1560 | /* | |
1561 | * Send the session's metadata | |
1562 | * | |
1563 | * Return 0 on success else a negative value. | |
1564 | */ | |
1565 | static | |
58eb9381 | 1566 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1567 | { |
1568 | int ret = 0; | |
1569 | ssize_t read_len; | |
1570 | uint64_t len = 0; | |
1571 | char *data = NULL; | |
1572 | struct lttng_viewer_get_metadata request; | |
1573 | struct lttng_viewer_metadata_packet reply; | |
9a78c92e | 1574 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1575 | |
58eb9381 | 1576 | assert(conn); |
d3e2ba59 JD |
1577 | |
1578 | DBG("Relay get metadata"); | |
1579 | ||
eea7556c | 1580 | health_code_update(); |
2f8f53af | 1581 | |
58eb9381 | 1582 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1583 | if (ret < 0) { |
d3e2ba59 JD |
1584 | goto end; |
1585 | } | |
eea7556c | 1586 | health_code_update(); |
d3e2ba59 | 1587 | |
53efb85a MD |
1588 | memset(&reply, 0, sizeof(reply)); |
1589 | ||
9a78c92e MD |
1590 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1591 | if (!vstream) { | |
3271c155 MD |
1592 | /* |
1593 | * The metadata stream can be closed by a CLOSE command | |
1594 | * just before we attach. It can also be closed by | |
1595 | * per-pid tracing during tracing. Therefore, it is | |
1596 | * possible that we cannot find this viewer stream. | |
1597 | * Reply back to the client with an error if we cannot | |
1598 | * find it. | |
1599 | */ | |
c00978f1 MD |
1600 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
1601 | be64toh(request.stream_id)); | |
3271c155 | 1602 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
9a78c92e | 1603 | goto send_reply; |
d3e2ba59 | 1604 | } |
9a78c92e MD |
1605 | pthread_mutex_lock(&vstream->stream->lock); |
1606 | if (!vstream->stream->is_metadata) { | |
1607 | ERR("Invalid metadata stream"); | |
6763619c JD |
1608 | goto error; |
1609 | } | |
1610 | ||
9a78c92e | 1611 | assert(vstream->metadata_sent <= vstream->stream->metadata_received); |
2a174661 | 1612 | |
9a78c92e | 1613 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
d3e2ba59 | 1614 | if (len == 0) { |
c4e361a4 | 1615 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1616 | goto send_reply; |
1617 | } | |
1618 | ||
1619 | /* first time, we open the metadata file */ | |
9a78c92e | 1620 | if (!vstream->stream_fd) { |
d3e2ba59 JD |
1621 | char fullpath[PATH_MAX]; |
1622 | ||
9a78c92e MD |
1623 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", vstream->path_name, |
1624 | vstream->channel_name); | |
d3e2ba59 JD |
1625 | if (ret < 0) { |
1626 | goto error; | |
1627 | } | |
1628 | ret = open(fullpath, O_RDONLY); | |
1629 | if (ret < 0) { | |
1630 | PERROR("Relay opening metadata file"); | |
1631 | goto error; | |
1632 | } | |
9a78c92e MD |
1633 | vstream->stream_fd = stream_fd_create(ret); |
1634 | if (!vstream->stream_fd) { | |
1635 | if (close(ret)) { | |
1636 | PERROR("close"); | |
1637 | } | |
1638 | goto error; | |
1639 | } | |
d3e2ba59 JD |
1640 | } |
1641 | ||
1642 | reply.len = htobe64(len); | |
1643 | data = zmalloc(len); | |
1644 | if (!data) { | |
1645 | PERROR("viewer metadata zmalloc"); | |
1646 | goto error; | |
1647 | } | |
1648 | ||
9a78c92e | 1649 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1650 | if (read_len < len) { |
d3e2ba59 JD |
1651 | PERROR("Relay reading metadata file"); |
1652 | goto error; | |
1653 | } | |
9a78c92e MD |
1654 | vstream->metadata_sent += read_len; |
1655 | if (vstream->metadata_sent == vstream->stream->metadata_received | |
1656 | && vstream->stream->closed) { | |
1657 | /* Release ownership for the viewer metadata stream. */ | |
1658 | viewer_stream_put(vstream); | |
1659 | } | |
1660 | ||
c4e361a4 | 1661 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
9a78c92e | 1662 | |
d3e2ba59 JD |
1663 | goto send_reply; |
1664 | ||
1665 | error: | |
c4e361a4 | 1666 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1667 | |
1668 | send_reply: | |
eea7556c | 1669 | health_code_update(); |
9a78c92e MD |
1670 | if (vstream) { |
1671 | pthread_mutex_unlock(&vstream->stream->lock); | |
1672 | } | |
58eb9381 | 1673 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1674 | if (ret < 0) { |
9a78c92e | 1675 | goto end_free; |
d3e2ba59 | 1676 | } |
eea7556c | 1677 | health_code_update(); |
d3e2ba59 JD |
1678 | |
1679 | if (len > 0) { | |
58eb9381 | 1680 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1681 | if (ret < 0) { |
9a78c92e | 1682 | goto end_free; |
d3e2ba59 JD |
1683 | } |
1684 | } | |
1685 | ||
1686 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1687 | be64toh(request.stream_id)); | |
1688 | ||
1689 | DBG("Metadata sent"); | |
1690 | ||
9a78c92e | 1691 | end_free: |
d3e2ba59 | 1692 | free(data); |
d3e2ba59 | 1693 | end: |
9a78c92e MD |
1694 | if (vstream) { |
1695 | viewer_stream_put(vstream); | |
1696 | } | |
d3e2ba59 JD |
1697 | return ret; |
1698 | } | |
1699 | ||
c3b7390b JD |
1700 | /* |
1701 | * Create a viewer session. | |
1702 | * | |
1703 | * Return 0 on success or else a negative value. | |
1704 | */ | |
1705 | static | |
1706 | int viewer_create_session(struct relay_connection *conn) | |
1707 | { | |
1708 | int ret; | |
1709 | struct lttng_viewer_create_session_response resp; | |
1710 | ||
1711 | DBG("Viewer create session received"); | |
1712 | ||
53efb85a | 1713 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1714 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
9a78c92e | 1715 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
1716 | if (!conn->viewer_session) { |
1717 | ERR("Allocation viewer session"); | |
1718 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1719 | goto send_reply; | |
1720 | } | |
c3b7390b JD |
1721 | |
1722 | send_reply: | |
1723 | health_code_update(); | |
1724 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1725 | if (ret < 0) { | |
1726 | goto end; | |
1727 | } | |
1728 | health_code_update(); | |
1729 | ret = 0; | |
1730 | ||
1731 | end: | |
1732 | return ret; | |
1733 | } | |
1734 | ||
1735 | ||
d3e2ba59 JD |
1736 | /* |
1737 | * live_relay_unknown_command: send -1 if received unknown command | |
1738 | */ | |
1739 | static | |
58eb9381 | 1740 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1741 | { |
1742 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1743 | |
53efb85a | 1744 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1745 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1746 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1747 | } |
1748 | ||
1749 | /* | |
1750 | * Process the commands received on the control socket | |
1751 | */ | |
1752 | static | |
1753 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1754 | struct relay_connection *conn) |
d3e2ba59 JD |
1755 | { |
1756 | int ret = 0; | |
2f8f53af DG |
1757 | uint32_t msg_value; |
1758 | ||
2f8f53af DG |
1759 | msg_value = be32toh(recv_hdr->cmd); |
1760 | ||
1761 | /* | |
1762 | * Make sure we've done the version check before any command other then a | |
1763 | * new client connection. | |
1764 | */ | |
c4e361a4 | 1765 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1766 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1767 | ret = -1; |
1768 | goto end; | |
1769 | } | |
d3e2ba59 | 1770 | |
2f8f53af | 1771 | switch (msg_value) { |
c4e361a4 | 1772 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1773 | ret = viewer_connect(conn); |
d3e2ba59 | 1774 | break; |
c4e361a4 | 1775 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1776 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1777 | break; |
c4e361a4 | 1778 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1779 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1780 | break; |
c4e361a4 | 1781 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1782 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1783 | break; |
c4e361a4 | 1784 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1785 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1786 | break; |
c4e361a4 | 1787 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1788 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1789 | break; |
c4e361a4 | 1790 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1791 | ret = viewer_get_new_streams(conn); |
80e8027a | 1792 | break; |
c3b7390b JD |
1793 | case LTTNG_VIEWER_CREATE_SESSION: |
1794 | ret = viewer_create_session(conn); | |
1795 | break; | |
d3e2ba59 | 1796 | default: |
9a78c92e MD |
1797 | ERR("Received unknown viewer command (%u)", |
1798 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 1799 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1800 | ret = -1; |
1801 | goto end; | |
1802 | } | |
1803 | ||
1804 | end: | |
1805 | return ret; | |
1806 | } | |
1807 | ||
1808 | static | |
58eb9381 | 1809 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1810 | { |
1811 | int ret; | |
1812 | ||
58eb9381 | 1813 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1814 | |
1815 | ret = close(pollfd); | |
1816 | if (ret < 0) { | |
1817 | ERR("Closing pollfd %d", pollfd); | |
1818 | } | |
1819 | } | |
1820 | ||
d3e2ba59 JD |
1821 | /* |
1822 | * This thread does the actual work | |
1823 | */ | |
1824 | static | |
1825 | void *thread_worker(void *data) | |
1826 | { | |
1827 | int ret, err = -1; | |
1828 | uint32_t nb_fd; | |
d3e2ba59 | 1829 | struct lttng_poll_event events; |
9a78c92e | 1830 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
1831 | struct lttng_ht_iter iter; |
1832 | struct lttng_viewer_cmd recv_hdr; | |
f89048c1 | 1833 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
1834 | |
1835 | DBG("[thread] Live viewer relay worker started"); | |
1836 | ||
1837 | rcu_register_thread(); | |
1838 | ||
eea7556c MD |
1839 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1840 | ||
9b5e0863 MD |
1841 | if (testpoint(relayd_thread_live_worker)) { |
1842 | goto error_testpoint; | |
1843 | } | |
1844 | ||
d3e2ba59 | 1845 | /* table of connections indexed on socket */ |
9a78c92e MD |
1846 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1847 | if (!viewer_connections_ht) { | |
1848 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
1849 | } |
1850 | ||
1851 | ret = create_thread_poll_set(&events, 2); | |
1852 | if (ret < 0) { | |
1853 | goto error_poll_create; | |
1854 | } | |
1855 | ||
58eb9381 | 1856 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1857 | if (ret < 0) { |
1858 | goto error; | |
1859 | } | |
1860 | ||
1861 | restart: | |
1862 | while (1) { | |
1863 | int i; | |
1864 | ||
eea7556c MD |
1865 | health_code_update(); |
1866 | ||
d3e2ba59 JD |
1867 | /* Infinite blocking call, waiting for transmission */ |
1868 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1869 | health_poll_entry(); |
d3e2ba59 | 1870 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1871 | health_poll_exit(); |
d3e2ba59 JD |
1872 | if (ret < 0) { |
1873 | /* | |
1874 | * Restart interrupted system call. | |
1875 | */ | |
1876 | if (errno == EINTR) { | |
1877 | goto restart; | |
1878 | } | |
1879 | goto error; | |
1880 | } | |
1881 | ||
1882 | nb_fd = ret; | |
1883 | ||
1884 | /* | |
1885 | * Process control. The control connection is prioritised so we don't | |
1886 | * starve it with high throughput tracing data on the data | |
1887 | * connection. | |
1888 | */ | |
1889 | for (i = 0; i < nb_fd; i++) { | |
1890 | /* Fetch once the poll data */ | |
1891 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1892 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1893 | ||
eea7556c MD |
1894 | health_code_update(); |
1895 | ||
e0077699 MD |
1896 | if (!revents) { |
1897 | /* No activity for this FD (poll implementation). */ | |
1898 | continue; | |
1899 | } | |
1900 | ||
d3e2ba59 | 1901 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 1902 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
1903 | if (ret) { |
1904 | err = 0; | |
1905 | goto exit; | |
1906 | } | |
1907 | ||
9a78c92e | 1908 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 1909 | if (pollfd == live_conn_pipe[0]) { |
d3e2ba59 JD |
1910 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1911 | ERR("Relay live pipe error"); | |
1912 | goto error; | |
1913 | } else if (revents & LPOLLIN) { | |
f89048c1 JG |
1914 | struct relay_connection *conn; |
1915 | ||
9a78c92e MD |
1916 | ret = lttng_read(live_conn_pipe[0], |
1917 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
1918 | if (ret < 0) { |
1919 | goto error; | |
1920 | } | |
58eb9381 DG |
1921 | lttng_poll_add(&events, conn->sock->fd, |
1922 | LPOLLIN | LPOLLRDHUP); | |
9a78c92e MD |
1923 | connection_ht_add(viewer_connections_ht, conn); |
1924 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
d3e2ba59 | 1925 | } |
58eb9381 | 1926 | } else { |
9a78c92e | 1927 | /* Connection activity. */ |
f89048c1 JG |
1928 | struct relay_connection *conn; |
1929 | ||
9a78c92e MD |
1930 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
1931 | if (!conn) { | |
1932 | continue; | |
1933 | } | |
58eb9381 DG |
1934 | |
1935 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1936 | cleanup_connection_pollfd(&events, pollfd); | |
9a78c92e MD |
1937 | /* Put "create" ownership reference. */ |
1938 | connection_put(conn); | |
d3e2ba59 | 1939 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
1940 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
1941 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 1942 | if (ret <= 0) { |
9a78c92e | 1943 | /* Connection closed. */ |
58eb9381 | 1944 | cleanup_connection_pollfd(&events, pollfd); |
9a78c92e MD |
1945 | /* Put "create" ownership reference. */ |
1946 | connection_put(conn); | |
58eb9381 | 1947 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 1948 | } else { |
58eb9381 | 1949 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
1950 | if (ret < 0) { |
1951 | /* Clear the session on error. */ | |
58eb9381 | 1952 | cleanup_connection_pollfd(&events, pollfd); |
9a78c92e MD |
1953 | /* Put "create" ownership reference. */ |
1954 | connection_put(conn); | |
d3e2ba59 JD |
1955 | DBG("Viewer connection closed with %d", pollfd); |
1956 | } | |
1957 | } | |
1958 | } | |
9a78c92e MD |
1959 | /* Put local "get_by_sock" reference. */ |
1960 | connection_put(conn); | |
d3e2ba59 JD |
1961 | } |
1962 | } | |
1963 | } | |
1964 | ||
1965 | exit: | |
1966 | error: | |
1967 | lttng_poll_clean(&events); | |
1968 | ||
58eb9381 | 1969 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 1970 | rcu_read_lock(); |
9a78c92e | 1971 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
f89048c1 | 1972 | destroy_conn, |
58eb9381 | 1973 | sock_n.node) { |
eea7556c | 1974 | health_code_update(); |
9a78c92e | 1975 | connection_put(destroy_conn); |
d3e2ba59 JD |
1976 | } |
1977 | rcu_read_unlock(); | |
1978 | error_poll_create: | |
9a78c92e MD |
1979 | lttng_ht_destroy(viewer_connections_ht); |
1980 | viewer_connections_ht_error: | |
58eb9381 DG |
1981 | /* Close relay conn pipes */ |
1982 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
1983 | if (err) { |
1984 | DBG("Viewer worker thread exited with error"); | |
1985 | } | |
1986 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 1987 | error_testpoint: |
eea7556c MD |
1988 | if (err) { |
1989 | health_error(); | |
1990 | ERR("Health error occurred in %s", __func__); | |
1991 | } | |
1992 | health_unregister(health_relayd); | |
770f96f4 MD |
1993 | if (lttng_relay_stop_threads()) { |
1994 | ERR("Error stopping threads"); | |
77c54fed | 1995 | } |
d3e2ba59 JD |
1996 | rcu_unregister_thread(); |
1997 | return NULL; | |
1998 | } | |
1999 | ||
2000 | /* | |
2001 | * Create the relay command pipe to wake thread_manage_apps. | |
2002 | * Closed in cleanup(). | |
2003 | */ | |
58eb9381 | 2004 | static int create_conn_pipe(void) |
d3e2ba59 | 2005 | { |
77c54fed MD |
2006 | return utils_create_pipe_cloexec(live_conn_pipe); |
2007 | } | |
d3e2ba59 | 2008 | |
77c54fed | 2009 | int relayd_live_join(void) |
d3e2ba59 | 2010 | { |
77c54fed | 2011 | int ret, retval = 0; |
d3e2ba59 JD |
2012 | void *status; |
2013 | ||
d3e2ba59 | 2014 | ret = pthread_join(live_listener_thread, &status); |
77c54fed MD |
2015 | if (ret) { |
2016 | errno = ret; | |
d3e2ba59 | 2017 | PERROR("pthread_join live listener"); |
77c54fed | 2018 | retval = -1; |
d3e2ba59 JD |
2019 | } |
2020 | ||
2021 | ret = pthread_join(live_worker_thread, &status); | |
77c54fed MD |
2022 | if (ret) { |
2023 | errno = ret; | |
d3e2ba59 | 2024 | PERROR("pthread_join live worker"); |
77c54fed | 2025 | retval = -1; |
d3e2ba59 JD |
2026 | } |
2027 | ||
2028 | ret = pthread_join(live_dispatcher_thread, &status); | |
77c54fed MD |
2029 | if (ret) { |
2030 | errno = ret; | |
d3e2ba59 | 2031 | PERROR("pthread_join live dispatcher"); |
77c54fed | 2032 | retval = -1; |
d3e2ba59 JD |
2033 | } |
2034 | ||
77c54fed | 2035 | cleanup_relayd_live(); |
d3e2ba59 | 2036 | |
77c54fed | 2037 | return retval; |
d3e2ba59 JD |
2038 | } |
2039 | ||
2040 | /* | |
2041 | * main | |
2042 | */ | |
9a78c92e | 2043 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2044 | { |
77c54fed | 2045 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2046 | void *status; |
2047 | int is_root; | |
2048 | ||
77c54fed MD |
2049 | if (!uri) { |
2050 | retval = -1; | |
2051 | goto exit_init_data; | |
2052 | } | |
d3e2ba59 JD |
2053 | live_uri = uri; |
2054 | ||
d3e2ba59 JD |
2055 | /* Check if daemon is UID = 0 */ |
2056 | is_root = !getuid(); | |
2057 | ||
2058 | if (!is_root) { | |
2059 | if (live_uri->port < 1024) { | |
2060 | ERR("Need to be root to use ports < 1024"); | |
77c54fed MD |
2061 | retval = -1; |
2062 | goto exit_init_data; | |
d3e2ba59 JD |
2063 | } |
2064 | } | |
2065 | ||
2066 | /* Setup the thread apps communication pipe. */ | |
77c54fed MD |
2067 | if (create_conn_pipe()) { |
2068 | retval = -1; | |
2069 | goto exit_init_data; | |
d3e2ba59 JD |
2070 | } |
2071 | ||
2072 | /* Init relay command queue. */ | |
8bdee6e2 | 2073 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2074 | |
2075 | /* Set up max poll set size */ | |
2076 | lttng_poll_set_max_size(); | |
2077 | ||
2078 | /* Setup the dispatcher thread */ | |
2079 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2080 | thread_dispatcher, (void *) NULL); | |
77c54fed MD |
2081 | if (ret) { |
2082 | errno = ret; | |
d3e2ba59 | 2083 | PERROR("pthread_create viewer dispatcher"); |
77c54fed MD |
2084 | retval = -1; |
2085 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2086 | } |
2087 | ||
2088 | /* Setup the worker thread */ | |
2089 | ret = pthread_create(&live_worker_thread, NULL, | |
9a78c92e | 2090 | thread_worker, NULL); |
77c54fed MD |
2091 | if (ret) { |
2092 | errno = ret; | |
d3e2ba59 | 2093 | PERROR("pthread_create viewer worker"); |
77c54fed MD |
2094 | retval = -1; |
2095 | goto exit_worker_thread; | |
d3e2ba59 JD |
2096 | } |
2097 | ||
2098 | /* Setup the listener thread */ | |
2099 | ret = pthread_create(&live_listener_thread, NULL, | |
2100 | thread_listener, (void *) NULL); | |
77c54fed MD |
2101 | if (ret) { |
2102 | errno = ret; | |
d3e2ba59 | 2103 | PERROR("pthread_create viewer listener"); |
77c54fed MD |
2104 | retval = -1; |
2105 | goto exit_listener_thread; | |
d3e2ba59 JD |
2106 | } |
2107 | ||
77c54fed MD |
2108 | /* |
2109 | * All OK, started all threads. | |
2110 | */ | |
2111 | return retval; | |
2112 | ||
bafd3fc0 JG |
2113 | /* |
2114 | * Join on the live_listener_thread should anything be added after | |
2115 | * the live_listener thread's creation. | |
2116 | */ | |
d3e2ba59 | 2117 | |
77c54fed | 2118 | exit_listener_thread: |
d3e2ba59 | 2119 | |
d3e2ba59 | 2120 | ret = pthread_join(live_worker_thread, &status); |
77c54fed MD |
2121 | if (ret) { |
2122 | errno = ret; | |
d3e2ba59 | 2123 | PERROR("pthread_join live worker"); |
77c54fed | 2124 | retval = -1; |
d3e2ba59 | 2125 | } |
77c54fed | 2126 | exit_worker_thread: |
d3e2ba59 | 2127 | |
d3e2ba59 | 2128 | ret = pthread_join(live_dispatcher_thread, &status); |
77c54fed MD |
2129 | if (ret) { |
2130 | errno = ret; | |
d3e2ba59 | 2131 | PERROR("pthread_join live dispatcher"); |
77c54fed | 2132 | retval = -1; |
d3e2ba59 | 2133 | } |
77c54fed | 2134 | exit_dispatcher_thread: |
d3e2ba59 | 2135 | |
77c54fed MD |
2136 | exit_init_data: |
2137 | cleanup_relayd_live(); | |
d3e2ba59 | 2138 | |
77c54fed | 2139 | return retval; |
d3e2ba59 | 2140 | } |