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 | 309 | /* |
d812ecb9 | 310 | * stream published is protected by the session lock. |
7591bab1 MD |
311 | */ |
312 | if (!stream->published) { | |
313 | goto next; | |
314 | } | |
315 | vstream = viewer_stream_get_by_id(stream->stream_handle); | |
2f8f53af | 316 | if (!vstream) { |
7591bab1 | 317 | vstream = viewer_stream_create(stream, seek_t); |
2a174661 DG |
318 | if (!vstream) { |
319 | ret = -1; | |
7591bab1 MD |
320 | ctf_trace_put(ctf_trace); |
321 | stream_put(stream); | |
2a174661 DG |
322 | goto error_unlock; |
323 | } | |
2a174661 DG |
324 | |
325 | if (nb_created) { | |
326 | /* Update number of created stream counter. */ | |
327 | (*nb_created)++; | |
328 | } | |
2229a09c MD |
329 | /* |
330 | * Ensure a self-reference is preserved even | |
331 | * after we have put our local reference. | |
332 | */ | |
333 | viewer_stream_get(vstream); | |
7591bab1 MD |
334 | } else { |
335 | if (!vstream->sent_flag && nb_unsent) { | |
336 | /* Update number of unsent stream counter. */ | |
337 | (*nb_unsent)++; | |
338 | } | |
2f8f53af | 339 | } |
2a174661 DG |
340 | /* Update number of total stream counter. */ |
341 | if (nb_total) { | |
2229a09c MD |
342 | if (stream->is_metadata) { |
343 | if (!stream->closed || | |
344 | stream->metadata_received > vstream->metadata_sent) { | |
345 | (*nb_total)++; | |
346 | } | |
347 | } else { | |
348 | if (!stream->closed || | |
349 | !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
350 | ||
351 | (*nb_total)++; | |
352 | } | |
353 | } | |
2f8f53af | 354 | } |
2229a09c MD |
355 | /* Put local reference. */ |
356 | viewer_stream_put(vstream); | |
7591bab1 MD |
357 | next: |
358 | stream_put(stream); | |
2f8f53af | 359 | } |
7591bab1 | 360 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
361 | } |
362 | ||
363 | ret = 0; | |
364 | ||
365 | error_unlock: | |
2a174661 | 366 | rcu_read_unlock(); |
7591bab1 | 367 | pthread_mutex_unlock(&session->lock); |
2f8f53af DG |
368 | return ret; |
369 | } | |
370 | ||
b4aacfdc | 371 | int relayd_live_stop(void) |
d3e2ba59 | 372 | { |
b4aacfdc | 373 | /* Stop dispatch thread */ |
d3e2ba59 | 374 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 375 | futex_nto1_wake(&viewer_conn_queue.futex); |
b4aacfdc | 376 | return 0; |
d3e2ba59 JD |
377 | } |
378 | ||
d3e2ba59 JD |
379 | /* |
380 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
381 | */ | |
382 | static | |
383 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
384 | { | |
385 | int ret; | |
386 | ||
387 | if (events == NULL || size == 0) { | |
388 | ret = -1; | |
389 | goto error; | |
390 | } | |
391 | ||
392 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
393 | if (ret < 0) { | |
394 | goto error; | |
395 | } | |
396 | ||
397 | /* Add quit pipe */ | |
bcf4a440 | 398 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
399 | if (ret < 0) { |
400 | goto error; | |
401 | } | |
402 | ||
403 | return 0; | |
404 | ||
405 | error: | |
406 | return ret; | |
407 | } | |
408 | ||
409 | /* | |
410 | * Check if the thread quit pipe was triggered. | |
411 | * | |
412 | * Return 1 if it was triggered else 0; | |
413 | */ | |
414 | static | |
bcf4a440 | 415 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 416 | { |
bcf4a440 | 417 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
418 | return 1; |
419 | } | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | /* | |
425 | * Create and init socket from uri. | |
426 | */ | |
427 | static | |
428 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
429 | { | |
430 | int ret; | |
431 | struct lttcomm_sock *sock = NULL; | |
432 | ||
433 | sock = lttcomm_alloc_sock_from_uri(uri); | |
434 | if (sock == NULL) { | |
435 | ERR("Allocating socket"); | |
436 | goto error; | |
437 | } | |
438 | ||
439 | ret = lttcomm_create_sock(sock); | |
440 | if (ret < 0) { | |
441 | goto error; | |
442 | } | |
443 | DBG("Listening on sock %d for live", sock->fd); | |
444 | ||
445 | ret = sock->ops->bind(sock); | |
446 | if (ret < 0) { | |
447 | goto error; | |
448 | } | |
449 | ||
450 | ret = sock->ops->listen(sock, -1); | |
451 | if (ret < 0) { | |
452 | goto error; | |
453 | ||
454 | } | |
455 | ||
456 | return sock; | |
457 | ||
458 | error: | |
459 | if (sock) { | |
460 | lttcomm_destroy_sock(sock); | |
461 | } | |
462 | return NULL; | |
463 | } | |
464 | ||
465 | /* | |
466 | * This thread manages the listening for new connections on the network | |
467 | */ | |
468 | static | |
469 | void *thread_listener(void *data) | |
470 | { | |
471 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
472 | uint32_t revents, nb_fd; |
473 | struct lttng_poll_event events; | |
474 | struct lttcomm_sock *live_control_sock; | |
475 | ||
476 | DBG("[thread] Relay live listener started"); | |
477 | ||
eea7556c MD |
478 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
479 | ||
480 | health_code_update(); | |
481 | ||
d3e2ba59 JD |
482 | live_control_sock = init_socket(live_uri); |
483 | if (!live_control_sock) { | |
484 | goto error_sock_control; | |
485 | } | |
486 | ||
fb4d42ab | 487 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
d3e2ba59 JD |
488 | ret = create_thread_poll_set(&events, 2); |
489 | if (ret < 0) { | |
490 | goto error_create_poll; | |
491 | } | |
492 | ||
493 | /* Add the control socket */ | |
494 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
495 | if (ret < 0) { | |
496 | goto error_poll_add; | |
497 | } | |
498 | ||
3fd27398 MD |
499 | lttng_relay_notify_ready(); |
500 | ||
9b5e0863 MD |
501 | if (testpoint(relayd_thread_live_listener)) { |
502 | goto error_testpoint; | |
503 | } | |
504 | ||
d3e2ba59 | 505 | while (1) { |
eea7556c MD |
506 | health_code_update(); |
507 | ||
d3e2ba59 JD |
508 | DBG("Listener accepting live viewers connections"); |
509 | ||
510 | restart: | |
eea7556c | 511 | health_poll_entry(); |
d3e2ba59 | 512 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 513 | health_poll_exit(); |
d3e2ba59 JD |
514 | if (ret < 0) { |
515 | /* | |
516 | * Restart interrupted system call. | |
517 | */ | |
518 | if (errno == EINTR) { | |
519 | goto restart; | |
520 | } | |
521 | goto error; | |
522 | } | |
523 | nb_fd = ret; | |
524 | ||
525 | DBG("Relay new viewer connection received"); | |
526 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
527 | health_code_update(); |
528 | ||
d3e2ba59 JD |
529 | /* Fetch once the poll data */ |
530 | revents = LTTNG_POLL_GETEV(&events, i); | |
531 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
532 | ||
fd20dac9 MD |
533 | if (!revents) { |
534 | /* No activity for this FD (poll implementation). */ | |
535 | continue; | |
536 | } | |
537 | ||
d3e2ba59 | 538 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 539 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
540 | if (ret) { |
541 | err = 0; | |
542 | goto exit; | |
543 | } | |
544 | ||
545 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
546 | ERR("socket poll error"); | |
547 | goto error; | |
548 | } else if (revents & LPOLLIN) { | |
549 | /* | |
7591bab1 MD |
550 | * A new connection is requested, therefore a |
551 | * viewer connection is allocated in this | |
552 | * thread, enqueued to a global queue and | |
553 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 554 | */ |
58eb9381 DG |
555 | int val = 1; |
556 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
557 | struct lttcomm_sock *newsock; |
558 | ||
d3e2ba59 JD |
559 | newsock = live_control_sock->ops->accept(live_control_sock); |
560 | if (!newsock) { | |
561 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
562 | goto error; |
563 | } | |
564 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 565 | |
d3e2ba59 | 566 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 567 | sizeof(val)); |
d3e2ba59 JD |
568 | if (ret < 0) { |
569 | PERROR("setsockopt inet"); | |
570 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
571 | goto error; |
572 | } | |
7591bab1 MD |
573 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
574 | if (!new_conn) { | |
575 | lttcomm_destroy_sock(newsock); | |
576 | goto error; | |
577 | } | |
578 | /* Ownership assumed by the connection. */ | |
579 | newsock = NULL; | |
d3e2ba59 | 580 | |
58eb9381 | 581 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
582 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
583 | &new_conn->qnode); | |
d3e2ba59 JD |
584 | |
585 | /* | |
7591bab1 MD |
586 | * Wake the dispatch queue futex. |
587 | * Implicit memory barrier with the | |
588 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 589 | */ |
58eb9381 | 590 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
591 | } |
592 | } | |
593 | } | |
594 | ||
595 | exit: | |
596 | error: | |
597 | error_poll_add: | |
9b5e0863 | 598 | error_testpoint: |
d3e2ba59 JD |
599 | lttng_poll_clean(&events); |
600 | error_create_poll: | |
601 | if (live_control_sock->fd >= 0) { | |
602 | ret = live_control_sock->ops->close(live_control_sock); | |
603 | if (ret) { | |
604 | PERROR("close"); | |
605 | } | |
606 | } | |
607 | lttcomm_destroy_sock(live_control_sock); | |
608 | error_sock_control: | |
609 | if (err) { | |
eea7556c | 610 | health_error(); |
d3e2ba59 JD |
611 | DBG("Live viewer listener thread exited with error"); |
612 | } | |
eea7556c | 613 | health_unregister(health_relayd); |
d3e2ba59 | 614 | DBG("Live viewer listener thread cleanup complete"); |
b4aacfdc MD |
615 | if (lttng_relay_stop_threads()) { |
616 | ERR("Error stopping threads"); | |
178a0557 | 617 | } |
d3e2ba59 JD |
618 | return NULL; |
619 | } | |
620 | ||
621 | /* | |
622 | * This thread manages the dispatching of the requests to worker threads | |
623 | */ | |
624 | static | |
625 | void *thread_dispatcher(void *data) | |
626 | { | |
6cd525e8 MD |
627 | int err = -1; |
628 | ssize_t ret; | |
8bdee6e2 | 629 | struct cds_wfcq_node *node; |
58eb9381 | 630 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
631 | |
632 | DBG("[thread] Live viewer relay dispatcher started"); | |
633 | ||
eea7556c MD |
634 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
635 | ||
9b5e0863 MD |
636 | if (testpoint(relayd_thread_live_dispatcher)) { |
637 | goto error_testpoint; | |
638 | } | |
639 | ||
eea7556c MD |
640 | health_code_update(); |
641 | ||
d3e2ba59 | 642 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
643 | health_code_update(); |
644 | ||
d3e2ba59 | 645 | /* Atomically prepare the queue futex */ |
58eb9381 | 646 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
647 | |
648 | do { | |
eea7556c MD |
649 | health_code_update(); |
650 | ||
d3e2ba59 | 651 | /* Dequeue commands */ |
8bdee6e2 SM |
652 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
653 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
654 | if (node == NULL) { |
655 | DBG("Woken up but nothing in the live-viewer " | |
656 | "relay command queue"); | |
657 | /* Continue thread execution */ | |
658 | break; | |
659 | } | |
58eb9381 | 660 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 661 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 662 | conn->sock->fd); |
d3e2ba59 JD |
663 | |
664 | /* | |
7591bab1 MD |
665 | * Inform worker thread of the new request. This |
666 | * call is blocking so we can be assured that | |
667 | * the data will be read at some point in time | |
668 | * or wait to the end of the world :) | |
d3e2ba59 | 669 | */ |
58eb9381 DG |
670 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
671 | if (ret < 0) { | |
672 | PERROR("write conn pipe"); | |
7591bab1 | 673 | connection_put(conn); |
d3e2ba59 JD |
674 | goto error; |
675 | } | |
676 | } while (node != NULL); | |
677 | ||
678 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 679 | health_poll_entry(); |
58eb9381 | 680 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 681 | health_poll_exit(); |
d3e2ba59 JD |
682 | } |
683 | ||
eea7556c MD |
684 | /* Normal exit, no error */ |
685 | err = 0; | |
686 | ||
d3e2ba59 | 687 | error: |
9b5e0863 | 688 | error_testpoint: |
eea7556c MD |
689 | if (err) { |
690 | health_error(); | |
691 | ERR("Health error occurred in %s", __func__); | |
692 | } | |
693 | health_unregister(health_relayd); | |
d3e2ba59 | 694 | DBG("Live viewer dispatch thread dying"); |
b4aacfdc MD |
695 | if (lttng_relay_stop_threads()) { |
696 | ERR("Error stopping threads"); | |
178a0557 | 697 | } |
d3e2ba59 JD |
698 | return NULL; |
699 | } | |
700 | ||
701 | /* | |
702 | * Establish connection with the viewer and check the versions. | |
703 | * | |
704 | * Return 0 on success or else negative value. | |
705 | */ | |
706 | static | |
58eb9381 | 707 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
708 | { |
709 | int ret; | |
710 | struct lttng_viewer_connect reply, msg; | |
711 | ||
58eb9381 | 712 | conn->version_check_done = 1; |
d3e2ba59 | 713 | |
eea7556c MD |
714 | health_code_update(); |
715 | ||
2f8f53af DG |
716 | DBG("Viewer is establishing a connection to the relayd."); |
717 | ||
58eb9381 | 718 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 719 | if (ret < 0) { |
d3e2ba59 JD |
720 | goto end; |
721 | } | |
722 | ||
eea7556c MD |
723 | health_code_update(); |
724 | ||
f46b2ce6 | 725 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
726 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
727 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
728 | ||
729 | /* Major versions must be the same */ | |
730 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
731 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
732 | reply.major, be32toh(msg.major)); | |
72180669 | 733 | ret = -1; |
d3e2ba59 JD |
734 | goto end; |
735 | } | |
736 | ||
58eb9381 | 737 | conn->major = reply.major; |
d3e2ba59 JD |
738 | /* We adapt to the lowest compatible version */ |
739 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 740 | conn->minor = reply.minor; |
d3e2ba59 | 741 | } else { |
58eb9381 | 742 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
743 | } |
744 | ||
c4e361a4 | 745 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 746 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 747 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 748 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
749 | } else { |
750 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
751 | ret = -1; | |
752 | goto end; | |
753 | } | |
754 | ||
755 | reply.major = htobe32(reply.major); | |
756 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 757 | if (conn->type == RELAY_VIEWER_COMMAND) { |
93b4787b | 758 | /* |
7591bab1 MD |
759 | * Increment outside of htobe64 macro, because the argument can |
760 | * be used more than once within the macro, and thus the | |
761 | * operation may be undefined. | |
93b4787b | 762 | */ |
7591bab1 | 763 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
93b4787b | 764 | last_relay_viewer_session_id++; |
7591bab1 | 765 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
93b4787b | 766 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 767 | } |
eea7556c MD |
768 | |
769 | health_code_update(); | |
770 | ||
58eb9381 | 771 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 772 | if (ret < 0) { |
2f8f53af | 773 | goto end; |
d3e2ba59 JD |
774 | } |
775 | ||
eea7556c MD |
776 | health_code_update(); |
777 | ||
58eb9381 | 778 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
779 | ret = 0; |
780 | ||
781 | end: | |
782 | return ret; | |
783 | } | |
784 | ||
785 | /* | |
786 | * Send the viewer the list of current sessions. | |
7591bab1 MD |
787 | * We need to create a copy of the hash table content because otherwise |
788 | * we cannot assume the number of entries stays the same between getting | |
789 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
790 | * |
791 | * Return 0 on success or else a negative value. | |
792 | */ | |
793 | static | |
58eb9381 | 794 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
795 | { |
796 | int ret; | |
797 | struct lttng_viewer_list_sessions session_list; | |
d3e2ba59 | 798 | struct lttng_ht_iter iter; |
d3e2ba59 | 799 | struct relay_session *session; |
7591bab1 MD |
800 | struct lttng_viewer_session *send_session_buf = NULL; |
801 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
802 | uint32_t count = 0; | |
d3e2ba59 JD |
803 | |
804 | DBG("List sessions received"); | |
805 | ||
7591bab1 MD |
806 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
807 | if (!send_session_buf) { | |
808 | return -1; | |
d3e2ba59 JD |
809 | } |
810 | ||
7591bab1 MD |
811 | rcu_read_lock(); |
812 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 813 | session_n.node) { |
7591bab1 | 814 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 815 | |
eea7556c MD |
816 | health_code_update(); |
817 | ||
7591bab1 MD |
818 | if (count >= buf_count) { |
819 | struct lttng_viewer_session *newbuf; | |
820 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 821 | |
7591bab1 MD |
822 | newbuf = realloc(send_session_buf, |
823 | new_buf_count * sizeof(*send_session_buf)); | |
824 | if (!newbuf) { | |
825 | ret = -1; | |
826 | rcu_read_unlock(); | |
827 | goto end_free; | |
828 | } | |
829 | send_session_buf = newbuf; | |
830 | buf_count = new_buf_count; | |
6763619c | 831 | } |
7591bab1 MD |
832 | send_session = &send_session_buf[count]; |
833 | strncpy(send_session->session_name, session->session_name, | |
834 | sizeof(send_session->session_name)); | |
835 | strncpy(send_session->hostname, session->hostname, | |
836 | sizeof(send_session->hostname)); | |
837 | send_session->id = htobe64(session->id); | |
838 | send_session->live_timer = htobe32(session->live_timer); | |
839 | if (session->viewer_attached) { | |
840 | send_session->clients = htobe32(1); | |
841 | } else { | |
842 | send_session->clients = htobe32(0); | |
d227d5bd | 843 | } |
7591bab1 MD |
844 | send_session->streams = htobe32(session->stream_count); |
845 | count++; | |
846 | } | |
847 | rcu_read_unlock(); | |
d227d5bd | 848 | |
7591bab1 | 849 | session_list.sessions_count = htobe32(count); |
d227d5bd | 850 | |
7591bab1 | 851 | health_code_update(); |
d227d5bd | 852 | |
7591bab1 MD |
853 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
854 | if (ret < 0) { | |
855 | goto end_free; | |
d227d5bd | 856 | } |
d227d5bd | 857 | |
7591bab1 | 858 | health_code_update(); |
d227d5bd | 859 | |
7591bab1 MD |
860 | ret = send_response(conn->sock, send_session_buf, |
861 | count * sizeof(*send_session_buf)); | |
862 | if (ret < 0) { | |
863 | goto end_free; | |
d227d5bd | 864 | } |
7591bab1 | 865 | health_code_update(); |
d227d5bd | 866 | |
7591bab1 MD |
867 | ret = 0; |
868 | end_free: | |
869 | free(send_session_buf); | |
870 | return ret; | |
d227d5bd JD |
871 | } |
872 | ||
80e8027a | 873 | /* |
7591bab1 | 874 | * Send the viewer the list of current streams. |
80e8027a JD |
875 | */ |
876 | static | |
58eb9381 | 877 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
878 | { |
879 | int ret, send_streams = 0; | |
7591bab1 | 880 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
881 | struct lttng_viewer_new_streams_request request; |
882 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 883 | struct relay_session *session; |
6763619c | 884 | uint64_t session_id; |
bddf80e4 | 885 | bool closed = false; |
80e8027a | 886 | |
58eb9381 | 887 | assert(conn); |
80e8027a JD |
888 | |
889 | DBG("Get new streams received"); | |
890 | ||
80e8027a JD |
891 | health_code_update(); |
892 | ||
2f8f53af | 893 | /* Receive the request from the connected client. */ |
58eb9381 | 894 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 895 | if (ret < 0) { |
80e8027a JD |
896 | goto error; |
897 | } | |
6763619c | 898 | session_id = be64toh(request.session_id); |
80e8027a JD |
899 | |
900 | health_code_update(); | |
901 | ||
53efb85a MD |
902 | memset(&response, 0, sizeof(response)); |
903 | ||
7591bab1 | 904 | session = session_get_by_id(session_id); |
2f8f53af | 905 | if (!session) { |
6763619c | 906 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 907 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
908 | goto send_reply; |
909 | } | |
910 | ||
7591bab1 | 911 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
80e8027a | 912 | send_streams = 0; |
c4e361a4 | 913 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
914 | goto send_reply; |
915 | } | |
916 | ||
6763619c JD |
917 | send_streams = 1; |
918 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
919 | ||
7591bab1 | 920 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
bddf80e4 | 921 | &nb_created, &closed); |
2f8f53af | 922 | if (ret < 0) { |
7591bab1 | 923 | goto end_put_session; |
2f8f53af DG |
924 | } |
925 | /* Only send back the newly created streams with the unsent ones. */ | |
926 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
927 | response.streams_count = htobe32(nb_streams); |
928 | ||
4479f682 | 929 | /* |
2229a09c MD |
930 | * If the session is closed, HUP when there are no more streams |
931 | * with data. | |
4479f682 | 932 | */ |
bddf80e4 | 933 | if (closed && nb_total == 0) { |
4479f682 | 934 | send_streams = 0; |
bddf80e4 | 935 | response.streams_count = 0; |
4479f682 JD |
936 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
937 | goto send_reply; | |
938 | } | |
939 | ||
80e8027a JD |
940 | send_reply: |
941 | health_code_update(); | |
58eb9381 | 942 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 943 | if (ret < 0) { |
7591bab1 | 944 | goto end_put_session; |
80e8027a JD |
945 | } |
946 | health_code_update(); | |
947 | ||
948 | /* | |
7591bab1 MD |
949 | * Unknown or empty session, just return gracefully, the viewer |
950 | * knows what is happening. | |
80e8027a JD |
951 | */ |
952 | if (!send_streams || !nb_streams) { | |
953 | ret = 0; | |
7591bab1 | 954 | goto end_put_session; |
80e8027a JD |
955 | } |
956 | ||
2f8f53af | 957 | /* |
7591bab1 MD |
958 | * Send stream and *DON'T* ignore the sent flag so every viewer |
959 | * streams that were not sent from that point will be sent to | |
960 | * the viewer. | |
2f8f53af | 961 | */ |
58eb9381 | 962 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af | 963 | if (ret < 0) { |
7591bab1 | 964 | goto end_put_session; |
80e8027a JD |
965 | } |
966 | ||
7591bab1 MD |
967 | end_put_session: |
968 | if (session) { | |
969 | session_put(session); | |
970 | } | |
80e8027a JD |
971 | error: |
972 | return ret; | |
973 | } | |
974 | ||
d3e2ba59 JD |
975 | /* |
976 | * Send the viewer the list of current sessions. | |
977 | */ | |
978 | static | |
58eb9381 | 979 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 980 | { |
2f8f53af DG |
981 | int send_streams = 0; |
982 | ssize_t ret; | |
80e8027a | 983 | uint32_t nb_streams = 0; |
2f8f53af | 984 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
985 | struct lttng_viewer_attach_session_request request; |
986 | struct lttng_viewer_attach_session_response response; | |
7591bab1 | 987 | struct relay_session *session = NULL; |
bddf80e4 | 988 | bool closed = false; |
d3e2ba59 | 989 | |
58eb9381 | 990 | assert(conn); |
d3e2ba59 | 991 | |
eea7556c MD |
992 | health_code_update(); |
993 | ||
2f8f53af | 994 | /* Receive the request from the connected client. */ |
58eb9381 | 995 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 996 | if (ret < 0) { |
d3e2ba59 JD |
997 | goto error; |
998 | } | |
999 | ||
eea7556c MD |
1000 | health_code_update(); |
1001 | ||
53efb85a MD |
1002 | memset(&response, 0, sizeof(response)); |
1003 | ||
c3b7390b JD |
1004 | if (!conn->viewer_session) { |
1005 | DBG("Client trying to attach before creating a live viewer session"); | |
1006 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1007 | goto send_reply; | |
1008 | } | |
1009 | ||
7591bab1 | 1010 | session = session_get_by_id(be64toh(request.session_id)); |
2f8f53af | 1011 | if (!session) { |
d3e2ba59 JD |
1012 | DBG("Relay session %" PRIu64 " not found", |
1013 | be64toh(request.session_id)); | |
c4e361a4 | 1014 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1015 | goto send_reply; |
1016 | } | |
7591bab1 MD |
1017 | DBG("Attach session ID %" PRIu64 " received", |
1018 | be64toh(request.session_id)); | |
d3e2ba59 | 1019 | |
7591bab1 | 1020 | if (session->live_timer == 0) { |
d3e2ba59 | 1021 | DBG("Not live session"); |
c4e361a4 | 1022 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1023 | goto send_reply; |
7591bab1 MD |
1024 | } |
1025 | ||
1026 | send_streams = 1; | |
1027 | ret = viewer_session_attach(conn->viewer_session, session); | |
1028 | if (ret) { | |
1029 | DBG("Already a viewer attached"); | |
1030 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); | |
1031 | goto send_reply; | |
d3e2ba59 JD |
1032 | } |
1033 | ||
1034 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1035 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1036 | case LTTNG_VIEWER_SEEK_LAST: | |
7591bab1 | 1037 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1038 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1039 | break; |
1040 | default: | |
1041 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1042 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1043 | send_streams = 0; |
1044 | goto send_reply; | |
1045 | } | |
1046 | ||
bddf80e4 MD |
1047 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, |
1048 | NULL, &closed); | |
2f8f53af | 1049 | if (ret < 0) { |
7591bab1 | 1050 | goto end_put_session; |
d3e2ba59 | 1051 | } |
2f8f53af | 1052 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 | 1053 | |
bddf80e4 MD |
1054 | /* |
1055 | * If the session is closed when the viewer is attaching, it | |
1056 | * means some of the streams may have been concurrently removed, | |
1057 | * so we don't allow the viewer to attach, even if there are | |
1058 | * streams available. | |
1059 | */ | |
1060 | if (closed) { | |
1061 | send_streams = 0; | |
1062 | response.streams_count = 0; | |
1063 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
1064 | goto send_reply; | |
1065 | } | |
1066 | ||
d3e2ba59 | 1067 | send_reply: |
eea7556c | 1068 | health_code_update(); |
58eb9381 | 1069 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1070 | if (ret < 0) { |
7591bab1 | 1071 | goto end_put_session; |
d3e2ba59 | 1072 | } |
eea7556c | 1073 | health_code_update(); |
d3e2ba59 JD |
1074 | |
1075 | /* | |
7591bab1 MD |
1076 | * Unknown or empty session, just return gracefully, the viewer |
1077 | * knows what is happening. | |
d3e2ba59 | 1078 | */ |
157df586 | 1079 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1080 | ret = 0; |
7591bab1 | 1081 | goto end_put_session; |
d3e2ba59 JD |
1082 | } |
1083 | ||
2f8f53af | 1084 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1085 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af | 1086 | if (ret < 0) { |
7591bab1 | 1087 | goto end_put_session; |
d3e2ba59 | 1088 | } |
d3e2ba59 | 1089 | |
7591bab1 MD |
1090 | end_put_session: |
1091 | if (session) { | |
1092 | session_put(session); | |
1093 | } | |
4a9daf17 JD |
1094 | error: |
1095 | return ret; | |
1096 | } | |
1097 | ||
878c34cf DG |
1098 | /* |
1099 | * Open the index file if needed for the given vstream. | |
1100 | * | |
7591bab1 MD |
1101 | * If an index file is successfully opened, the vstream index_fd set with |
1102 | * it. | |
878c34cf DG |
1103 | * |
1104 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
7591bab1 MD |
1105 | * |
1106 | * Called with rstream lock held. | |
878c34cf DG |
1107 | */ |
1108 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1109 | struct relay_stream *rstream) | |
1110 | { | |
1111 | int ret = 0; | |
1112 | ||
7591bab1 | 1113 | if (vstream->index_fd) { |
878c34cf DG |
1114 | goto end; |
1115 | } | |
1116 | ||
1117 | /* | |
7591bab1 | 1118 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1119 | */ |
a44ca2ca | 1120 | if (rstream->index_received_seqcount == 0) { |
878c34cf DG |
1121 | ret = -ENOENT; |
1122 | goto end; | |
1123 | } | |
1124 | ret = index_open(vstream->path_name, vstream->channel_name, | |
7591bab1 MD |
1125 | vstream->stream->tracefile_count, |
1126 | vstream->current_tracefile_id); | |
878c34cf | 1127 | if (ret >= 0) { |
7591bab1 MD |
1128 | vstream->index_fd = stream_fd_create(ret); |
1129 | if (!vstream->index_fd) { | |
1130 | if (close(ret)) { | |
1131 | PERROR("close"); | |
1132 | } | |
1133 | ret = -1; | |
1134 | } else { | |
1135 | ret = 0; | |
1136 | } | |
878c34cf DG |
1137 | goto end; |
1138 | } | |
1139 | ||
1140 | end: | |
1141 | return ret; | |
1142 | } | |
1143 | ||
1144 | /* | |
7591bab1 MD |
1145 | * Check the status of the index for the given stream. This function |
1146 | * updates the index structure if needed and can put (close) the vstream | |
1147 | * in the HUP situation. | |
1148 | * | |
1149 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1150 | * that the index has been updated and is ready to be sent to the | |
1151 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1152 | * |
7591bab1 | 1153 | * Called with rstream lock held. |
878c34cf DG |
1154 | */ |
1155 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1156 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1157 | struct lttng_viewer_index *index) | |
1158 | { | |
1159 | int ret; | |
1160 | ||
7591bab1 | 1161 | if (trace->session->connection_closed |
a44ca2ca MD |
1162 | && rstream->index_received_seqcount |
1163 | == vstream->index_sent_seqcount) { | |
7591bab1 MD |
1164 | /* Last index sent and session connection is closed. */ |
1165 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1166 | goto hup; | |
1167 | } else if (rstream->beacon_ts_end != -1ULL && | |
a44ca2ca MD |
1168 | rstream->index_received_seqcount |
1169 | == vstream->index_sent_seqcount) { | |
7591bab1 MD |
1170 | /* |
1171 | * We've received a synchronization beacon and the last index | |
1172 | * available has been sent, the index for now is inactive. | |
1173 | * | |
1174 | * In this case, we have received a beacon which allows us to | |
1175 | * inform the client of a time interval during which we can | |
1176 | * guarantee that there are no events to read (and never will | |
1177 | * be). | |
1178 | */ | |
1179 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1180 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1181 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
1182 | goto index_ready; | |
a44ca2ca MD |
1183 | } else if (rstream->index_received_seqcount |
1184 | == vstream->index_sent_seqcount) { | |
7591bab1 | 1185 | /* |
a44ca2ca MD |
1186 | * This checks whether received == sent seqcount. In |
1187 | * this case, we have not received a beacon. Therefore, | |
1188 | * we can only ask the client to retry later. | |
7591bab1 MD |
1189 | */ |
1190 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1191 | goto index_ready; | |
a44ca2ca MD |
1192 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
1193 | vstream->current_tracefile_id, | |
1194 | vstream->index_sent_seqcount)) { | |
7591bab1 | 1195 | /* |
a44ca2ca MD |
1196 | * The next index we want to send cannot be read either |
1197 | * because we need to perform a rotation, or due to | |
1198 | * the producer having overwritten its trace file. | |
7591bab1 | 1199 | */ |
a44ca2ca | 1200 | DBG("Viewer stream %" PRIu64 " rotation", |
7591bab1 MD |
1201 | vstream->stream->stream_handle); |
1202 | ret = viewer_stream_rotate(vstream); | |
1203 | if (ret < 0) { | |
1204 | goto end; | |
1205 | } else if (ret == 1) { | |
1206 | /* EOF across entire stream. */ | |
1207 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1208 | goto hup; | |
1209 | } | |
7591bab1 | 1210 | /* |
a44ca2ca MD |
1211 | * If we have been pushed due to overwrite, it |
1212 | * necessarily means there is data that can be read in | |
1213 | * the stream. If we rotated because we reached the end | |
1214 | * of a tracefile, it means the following tracefile | |
1215 | * needs to contain at least one index, else we would | |
1216 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1217 | * viewer. The updated index_sent_seqcount needs to | |
1218 | * point to a readable index entry now. | |
1219 | * | |
1220 | * In the case where we "rotate" on a single file, we | |
1221 | * can end up in a case where the requested index is | |
1222 | * still unavailable. | |
7591bab1 | 1223 | */ |
a44ca2ca MD |
1224 | if (rstream->tracefile_count == 1 && |
1225 | !tracefile_array_seq_in_file( | |
1226 | rstream->tfa, | |
1227 | vstream->current_tracefile_id, | |
1228 | vstream->index_sent_seqcount)) { | |
1229 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1230 | goto index_ready; | |
878c34cf | 1231 | } |
a44ca2ca MD |
1232 | assert(tracefile_array_seq_in_file(rstream->tfa, |
1233 | vstream->current_tracefile_id, | |
1234 | vstream->index_sent_seqcount)); | |
878c34cf | 1235 | } |
a44ca2ca MD |
1236 | /* ret == 0 means successful so we continue. */ |
1237 | ret = 0; | |
7591bab1 | 1238 | end: |
878c34cf DG |
1239 | return ret; |
1240 | ||
1241 | hup: | |
7591bab1 | 1242 | viewer_stream_put(vstream); |
878c34cf DG |
1243 | index_ready: |
1244 | return 1; | |
1245 | } | |
1246 | ||
d3e2ba59 JD |
1247 | /* |
1248 | * Send the next index for a stream. | |
1249 | * | |
1250 | * Return 0 on success or else a negative value. | |
1251 | */ | |
1252 | static | |
58eb9381 | 1253 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1254 | { |
1255 | int ret; | |
878c34cf | 1256 | ssize_t read_ret; |
d3e2ba59 JD |
1257 | struct lttng_viewer_get_next_index request_index; |
1258 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1259 | struct ctf_packet_index packet_index; |
7591bab1 MD |
1260 | struct relay_viewer_stream *vstream = NULL; |
1261 | struct relay_stream *rstream = NULL; | |
1262 | struct ctf_trace *ctf_trace = NULL; | |
1263 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1264 | |
58eb9381 | 1265 | assert(conn); |
d3e2ba59 JD |
1266 | |
1267 | DBG("Viewer get next index"); | |
1268 | ||
7591bab1 | 1269 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1270 | health_code_update(); |
2f8f53af | 1271 | |
58eb9381 | 1272 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1273 | if (ret < 0) { |
d3e2ba59 JD |
1274 | goto end; |
1275 | } | |
eea7556c | 1276 | health_code_update(); |
d3e2ba59 | 1277 | |
7591bab1 | 1278 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1279 | if (!vstream) { |
a44ca2ca MD |
1280 | DBG("Client requested index of unknown stream id %" PRIu64, |
1281 | be64toh(request_index.stream_id)); | |
f1883937 MD |
1282 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1283 | goto send_reply; | |
2a174661 DG |
1284 | } |
1285 | ||
7591bab1 MD |
1286 | /* Use back. ref. Protected by refcounts. */ |
1287 | rstream = vstream->stream; | |
1288 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1289 | |
7591bab1 MD |
1290 | /* metadata_viewer_stream may be NULL. */ |
1291 | metadata_viewer_stream = | |
1292 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1293 | |
7591bab1 | 1294 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1295 | |
1296 | /* | |
1297 | * The viewer should not ask for index on metadata stream. | |
1298 | */ | |
7591bab1 | 1299 | if (rstream->is_metadata) { |
c4e361a4 | 1300 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1301 | goto send_reply; |
1302 | } | |
1303 | ||
878c34cf DG |
1304 | /* Try to open an index if one is needed for that stream. */ |
1305 | ret = try_open_index(vstream, rstream); | |
1306 | if (ret < 0) { | |
0e6830aa | 1307 | if (ret == -ENOENT) { |
d3e2ba59 | 1308 | /* |
7591bab1 MD |
1309 | * The index is created only when the first data |
1310 | * packet arrives, it might not be ready at the | |
1311 | * beginning of the session | |
d3e2ba59 | 1312 | */ |
c4e361a4 | 1313 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1314 | } else { |
1315 | /* Unhandled error. */ | |
c4e361a4 | 1316 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1317 | } |
878c34cf | 1318 | goto send_reply; |
d3e2ba59 JD |
1319 | } |
1320 | ||
878c34cf | 1321 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1322 | if (ret < 0) { |
7591bab1 | 1323 | goto error_put; |
878c34cf DG |
1324 | } else if (ret == 1) { |
1325 | /* | |
7591bab1 MD |
1326 | * We have no index to send and check_index_status has populated |
1327 | * viewer_index's status. | |
878c34cf | 1328 | */ |
d3e2ba59 JD |
1329 | goto send_reply; |
1330 | } | |
7591bab1 | 1331 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1332 | assert(!ret); |
d3e2ba59 | 1333 | |
7591bab1 MD |
1334 | /* |
1335 | * vstream->stream_fd may be NULL if it has been closed by | |
1336 | * tracefile rotation, or if we are at the beginning of the | |
1337 | * stream. We open the data stream file here to protect against | |
1338 | * overwrite caused by tracefile rotation (in association with | |
1339 | * unlink performed before overwrite). | |
1340 | */ | |
1341 | if (!vstream->stream_fd) { | |
1342 | char fullpath[PATH_MAX]; | |
1343 | ||
1344 | if (vstream->stream->tracefile_count > 0) { | |
1345 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, | |
1346 | vstream->path_name, | |
1347 | vstream->channel_name, | |
1348 | vstream->current_tracefile_id); | |
1349 | } else { | |
1350 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", | |
1351 | vstream->path_name, | |
1352 | vstream->channel_name); | |
1353 | } | |
1354 | if (ret < 0) { | |
1355 | goto error_put; | |
1356 | } | |
1357 | ret = open(fullpath, O_RDONLY); | |
1358 | if (ret < 0) { | |
1359 | PERROR("Relay opening trace file"); | |
1360 | goto error_put; | |
1361 | } | |
1362 | vstream->stream_fd = stream_fd_create(ret); | |
1363 | if (!vstream->stream_fd) { | |
1364 | if (close(ret)) { | |
1365 | PERROR("close"); | |
1366 | } | |
1367 | goto error_put; | |
1368 | } | |
d3e2ba59 JD |
1369 | } |
1370 | ||
f04a971b | 1371 | ret = check_new_streams(conn); |
4a9daf17 | 1372 | if (ret < 0) { |
7591bab1 MD |
1373 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1374 | goto send_reply; | |
4a9daf17 JD |
1375 | } else if (ret == 1) { |
1376 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1377 | } | |
1378 | ||
7591bab1 | 1379 | read_ret = lttng_read(vstream->index_fd->fd, &packet_index, |
6cd525e8 | 1380 | sizeof(packet_index)); |
7591bab1 MD |
1381 | if (read_ret < sizeof(packet_index)) { |
1382 | ERR("Relay reading index file %d returned %zd", | |
1383 | vstream->index_fd->fd, read_ret); | |
1384 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
6b6b9a5a | 1385 | goto send_reply; |
d3e2ba59 | 1386 | } else { |
c4e361a4 | 1387 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
a44ca2ca | 1388 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1389 | } |
1390 | ||
1391 | /* | |
1392 | * Indexes are stored in big endian, no need to switch before sending. | |
1393 | */ | |
7591bab1 MD |
1394 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1395 | rstream->stream_handle, | |
1396 | be64toh(packet_index.offset)); | |
d3e2ba59 JD |
1397 | viewer_index.offset = packet_index.offset; |
1398 | viewer_index.packet_size = packet_index.packet_size; | |
1399 | viewer_index.content_size = packet_index.content_size; | |
1400 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1401 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1402 | viewer_index.events_discarded = packet_index.events_discarded; | |
1403 | viewer_index.stream_id = packet_index.stream_id; | |
1404 | ||
1405 | send_reply: | |
f1883937 MD |
1406 | if (rstream) { |
1407 | pthread_mutex_unlock(&rstream->lock); | |
1408 | } | |
7591bab1 MD |
1409 | |
1410 | if (metadata_viewer_stream) { | |
1411 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1412 | DBG("get next index metadata check: recv %" PRIu64 | |
1413 | " sent %" PRIu64, | |
1414 | metadata_viewer_stream->stream->metadata_received, | |
1415 | metadata_viewer_stream->metadata_sent); | |
1416 | if (!metadata_viewer_stream->stream->metadata_received || | |
1417 | metadata_viewer_stream->stream->metadata_received > | |
1418 | metadata_viewer_stream->metadata_sent) { | |
1419 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1420 | } | |
1421 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1422 | } | |
1423 | ||
d3e2ba59 | 1424 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1425 | health_code_update(); |
2f8f53af | 1426 | |
58eb9381 | 1427 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1428 | if (ret < 0) { |
7591bab1 | 1429 | goto end; |
d3e2ba59 | 1430 | } |
eea7556c | 1431 | health_code_update(); |
d3e2ba59 | 1432 | |
9237e6a1 MD |
1433 | if (vstream) { |
1434 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
a44ca2ca | 1435 | vstream->index_sent_seqcount, |
9237e6a1 MD |
1436 | vstream->stream->stream_handle); |
1437 | } | |
d3e2ba59 | 1438 | end: |
7591bab1 MD |
1439 | if (metadata_viewer_stream) { |
1440 | viewer_stream_put(metadata_viewer_stream); | |
1441 | } | |
1442 | if (vstream) { | |
1443 | viewer_stream_put(vstream); | |
1444 | } | |
1445 | return ret; | |
1446 | ||
1447 | error_put: | |
1448 | pthread_mutex_unlock(&rstream->lock); | |
1449 | if (metadata_viewer_stream) { | |
1450 | viewer_stream_put(metadata_viewer_stream); | |
1451 | } | |
1452 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1453 | return ret; |
1454 | } | |
1455 | ||
1456 | /* | |
1457 | * Send the next index for a stream | |
1458 | * | |
1459 | * Return 0 on success or else a negative value. | |
1460 | */ | |
1461 | static | |
58eb9381 | 1462 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1463 | { |
1464 | int ret, send_data = 0; | |
1465 | char *data = NULL; | |
1466 | uint32_t len = 0; | |
1467 | ssize_t read_len; | |
1468 | struct lttng_viewer_get_packet get_packet_info; | |
1469 | struct lttng_viewer_trace_packet reply; | |
7591bab1 | 1470 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 JD |
1471 | |
1472 | DBG2("Relay get data packet"); | |
1473 | ||
eea7556c | 1474 | health_code_update(); |
2f8f53af | 1475 | |
7591bab1 MD |
1476 | ret = recv_request(conn->sock, &get_packet_info, |
1477 | sizeof(get_packet_info)); | |
2f8f53af | 1478 | if (ret < 0) { |
d3e2ba59 JD |
1479 | goto end; |
1480 | } | |
eea7556c | 1481 | health_code_update(); |
d3e2ba59 | 1482 | |
0233a6a5 DG |
1483 | /* From this point on, the error label can be reached. */ |
1484 | memset(&reply, 0, sizeof(reply)); | |
1485 | ||
7591bab1 MD |
1486 | vstream = viewer_stream_get_by_id(be64toh(get_packet_info.stream_id)); |
1487 | if (!vstream) { | |
a44ca2ca MD |
1488 | DBG("Client requested packet of unknown stream id %" PRIu64, |
1489 | be64toh(get_packet_info.stream_id)); | |
ba014812 MD |
1490 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1491 | goto send_reply_nolock; | |
d3e2ba59 | 1492 | } |
2a174661 | 1493 | |
7591bab1 | 1494 | pthread_mutex_lock(&vstream->stream->lock); |
4a9daf17 | 1495 | |
d3e2ba59 JD |
1496 | len = be32toh(get_packet_info.len); |
1497 | data = zmalloc(len); | |
1498 | if (!data) { | |
1499 | PERROR("relay data zmalloc"); | |
1500 | goto error; | |
1501 | } | |
1502 | ||
7591bab1 MD |
1503 | ret = lseek(vstream->stream_fd->fd, be64toh(get_packet_info.offset), |
1504 | SEEK_SET); | |
d3e2ba59 | 1505 | if (ret < 0) { |
7591bab1 MD |
1506 | PERROR("lseek fd %d to offset %" PRIu64, vstream->stream_fd->fd, |
1507 | be64toh(get_packet_info.offset)); | |
1508 | goto error; | |
d3e2ba59 | 1509 | } |
7591bab1 | 1510 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1511 | if (read_len < len) { |
7591bab1 MD |
1512 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, |
1513 | vstream->stream_fd->fd, | |
1514 | be64toh(get_packet_info.offset)); | |
1515 | goto error; | |
d3e2ba59 | 1516 | } |
c4e361a4 | 1517 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1518 | reply.len = htobe32(len); |
1519 | send_data = 1; | |
1520 | goto send_reply; | |
1521 | ||
1522 | error: | |
c4e361a4 | 1523 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1524 | |
1525 | send_reply: | |
7591bab1 MD |
1526 | if (vstream) { |
1527 | pthread_mutex_unlock(&vstream->stream->lock); | |
1528 | } | |
1529 | send_reply_nolock: | |
d3e2ba59 | 1530 | reply.flags = htobe32(reply.flags); |
eea7556c MD |
1531 | |
1532 | health_code_update(); | |
2f8f53af | 1533 | |
58eb9381 | 1534 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1535 | if (ret < 0) { |
7591bab1 | 1536 | goto end_free; |
d3e2ba59 | 1537 | } |
eea7556c | 1538 | health_code_update(); |
d3e2ba59 JD |
1539 | |
1540 | if (send_data) { | |
eea7556c | 1541 | health_code_update(); |
58eb9381 | 1542 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1543 | if (ret < 0) { |
7591bab1 | 1544 | goto end_free; |
d3e2ba59 | 1545 | } |
eea7556c | 1546 | health_code_update(); |
d3e2ba59 JD |
1547 | } |
1548 | ||
1549 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1550 | be64toh(get_packet_info.stream_id)); | |
1551 | ||
7591bab1 | 1552 | end_free: |
d3e2ba59 | 1553 | free(data); |
d3e2ba59 | 1554 | end: |
7591bab1 MD |
1555 | if (vstream) { |
1556 | viewer_stream_put(vstream); | |
1557 | } | |
d3e2ba59 JD |
1558 | return ret; |
1559 | } | |
1560 | ||
1561 | /* | |
1562 | * Send the session's metadata | |
1563 | * | |
1564 | * Return 0 on success else a negative value. | |
1565 | */ | |
1566 | static | |
58eb9381 | 1567 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1568 | { |
1569 | int ret = 0; | |
1570 | ssize_t read_len; | |
1571 | uint64_t len = 0; | |
1572 | char *data = NULL; | |
1573 | struct lttng_viewer_get_metadata request; | |
1574 | struct lttng_viewer_metadata_packet reply; | |
7591bab1 | 1575 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1576 | |
58eb9381 | 1577 | assert(conn); |
d3e2ba59 JD |
1578 | |
1579 | DBG("Relay get metadata"); | |
1580 | ||
eea7556c | 1581 | health_code_update(); |
2f8f53af | 1582 | |
58eb9381 | 1583 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1584 | if (ret < 0) { |
d3e2ba59 JD |
1585 | goto end; |
1586 | } | |
eea7556c | 1587 | health_code_update(); |
d3e2ba59 | 1588 | |
53efb85a MD |
1589 | memset(&reply, 0, sizeof(reply)); |
1590 | ||
7591bab1 MD |
1591 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1592 | if (!vstream) { | |
3b463131 MD |
1593 | /* |
1594 | * The metadata stream can be closed by a CLOSE command | |
1595 | * just before we attach. It can also be closed by | |
1596 | * per-pid tracing during tracing. Therefore, it is | |
1597 | * possible that we cannot find this viewer stream. | |
1598 | * Reply back to the client with an error if we cannot | |
1599 | * find it. | |
1600 | */ | |
a44ca2ca MD |
1601 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
1602 | be64toh(request.stream_id)); | |
3b463131 | 1603 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
7591bab1 | 1604 | goto send_reply; |
d3e2ba59 | 1605 | } |
7591bab1 MD |
1606 | pthread_mutex_lock(&vstream->stream->lock); |
1607 | if (!vstream->stream->is_metadata) { | |
1608 | ERR("Invalid metadata stream"); | |
6763619c JD |
1609 | goto error; |
1610 | } | |
1611 | ||
7591bab1 | 1612 | assert(vstream->metadata_sent <= vstream->stream->metadata_received); |
2a174661 | 1613 | |
7591bab1 | 1614 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
d3e2ba59 | 1615 | if (len == 0) { |
c4e361a4 | 1616 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1617 | goto send_reply; |
1618 | } | |
1619 | ||
1620 | /* first time, we open the metadata file */ | |
7591bab1 | 1621 | if (!vstream->stream_fd) { |
d3e2ba59 JD |
1622 | char fullpath[PATH_MAX]; |
1623 | ||
7591bab1 MD |
1624 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", vstream->path_name, |
1625 | vstream->channel_name); | |
d3e2ba59 JD |
1626 | if (ret < 0) { |
1627 | goto error; | |
1628 | } | |
1629 | ret = open(fullpath, O_RDONLY); | |
1630 | if (ret < 0) { | |
1631 | PERROR("Relay opening metadata file"); | |
1632 | goto error; | |
1633 | } | |
7591bab1 MD |
1634 | vstream->stream_fd = stream_fd_create(ret); |
1635 | if (!vstream->stream_fd) { | |
1636 | if (close(ret)) { | |
1637 | PERROR("close"); | |
1638 | } | |
1639 | goto error; | |
1640 | } | |
d3e2ba59 JD |
1641 | } |
1642 | ||
1643 | reply.len = htobe64(len); | |
1644 | data = zmalloc(len); | |
1645 | if (!data) { | |
1646 | PERROR("viewer metadata zmalloc"); | |
1647 | goto error; | |
1648 | } | |
1649 | ||
7591bab1 | 1650 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1651 | if (read_len < len) { |
d3e2ba59 JD |
1652 | PERROR("Relay reading metadata file"); |
1653 | goto error; | |
1654 | } | |
7591bab1 MD |
1655 | vstream->metadata_sent += read_len; |
1656 | if (vstream->metadata_sent == vstream->stream->metadata_received | |
1657 | && vstream->stream->closed) { | |
1658 | /* Release ownership for the viewer metadata stream. */ | |
1659 | viewer_stream_put(vstream); | |
1660 | } | |
1661 | ||
c4e361a4 | 1662 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
7591bab1 | 1663 | |
d3e2ba59 JD |
1664 | goto send_reply; |
1665 | ||
1666 | error: | |
c4e361a4 | 1667 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1668 | |
1669 | send_reply: | |
eea7556c | 1670 | health_code_update(); |
7591bab1 MD |
1671 | if (vstream) { |
1672 | pthread_mutex_unlock(&vstream->stream->lock); | |
1673 | } | |
58eb9381 | 1674 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1675 | if (ret < 0) { |
7591bab1 | 1676 | goto end_free; |
d3e2ba59 | 1677 | } |
eea7556c | 1678 | health_code_update(); |
d3e2ba59 JD |
1679 | |
1680 | if (len > 0) { | |
58eb9381 | 1681 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1682 | if (ret < 0) { |
7591bab1 | 1683 | goto end_free; |
d3e2ba59 JD |
1684 | } |
1685 | } | |
1686 | ||
1687 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1688 | be64toh(request.stream_id)); | |
1689 | ||
1690 | DBG("Metadata sent"); | |
1691 | ||
7591bab1 | 1692 | end_free: |
d3e2ba59 | 1693 | free(data); |
d3e2ba59 | 1694 | end: |
7591bab1 MD |
1695 | if (vstream) { |
1696 | viewer_stream_put(vstream); | |
1697 | } | |
d3e2ba59 JD |
1698 | return ret; |
1699 | } | |
1700 | ||
c3b7390b JD |
1701 | /* |
1702 | * Create a viewer session. | |
1703 | * | |
1704 | * Return 0 on success or else a negative value. | |
1705 | */ | |
1706 | static | |
1707 | int viewer_create_session(struct relay_connection *conn) | |
1708 | { | |
1709 | int ret; | |
1710 | struct lttng_viewer_create_session_response resp; | |
1711 | ||
1712 | DBG("Viewer create session received"); | |
1713 | ||
53efb85a | 1714 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1715 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
7591bab1 | 1716 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
1717 | if (!conn->viewer_session) { |
1718 | ERR("Allocation viewer session"); | |
1719 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1720 | goto send_reply; | |
1721 | } | |
c3b7390b JD |
1722 | |
1723 | send_reply: | |
1724 | health_code_update(); | |
1725 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1726 | if (ret < 0) { | |
1727 | goto end; | |
1728 | } | |
1729 | health_code_update(); | |
1730 | ret = 0; | |
1731 | ||
1732 | end: | |
1733 | return ret; | |
1734 | } | |
1735 | ||
1736 | ||
d3e2ba59 JD |
1737 | /* |
1738 | * live_relay_unknown_command: send -1 if received unknown command | |
1739 | */ | |
1740 | static | |
58eb9381 | 1741 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1742 | { |
1743 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1744 | |
53efb85a | 1745 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1746 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1747 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1748 | } |
1749 | ||
1750 | /* | |
1751 | * Process the commands received on the control socket | |
1752 | */ | |
1753 | static | |
1754 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1755 | struct relay_connection *conn) |
d3e2ba59 JD |
1756 | { |
1757 | int ret = 0; | |
2f8f53af DG |
1758 | uint32_t msg_value; |
1759 | ||
2f8f53af DG |
1760 | msg_value = be32toh(recv_hdr->cmd); |
1761 | ||
1762 | /* | |
1763 | * Make sure we've done the version check before any command other then a | |
1764 | * new client connection. | |
1765 | */ | |
c4e361a4 | 1766 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1767 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1768 | ret = -1; |
1769 | goto end; | |
1770 | } | |
d3e2ba59 | 1771 | |
2f8f53af | 1772 | switch (msg_value) { |
c4e361a4 | 1773 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1774 | ret = viewer_connect(conn); |
d3e2ba59 | 1775 | break; |
c4e361a4 | 1776 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1777 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1778 | break; |
c4e361a4 | 1779 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1780 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1781 | break; |
c4e361a4 | 1782 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1783 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1784 | break; |
c4e361a4 | 1785 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1786 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1787 | break; |
c4e361a4 | 1788 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1789 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1790 | break; |
c4e361a4 | 1791 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1792 | ret = viewer_get_new_streams(conn); |
80e8027a | 1793 | break; |
c3b7390b JD |
1794 | case LTTNG_VIEWER_CREATE_SESSION: |
1795 | ret = viewer_create_session(conn); | |
1796 | break; | |
d3e2ba59 | 1797 | default: |
7591bab1 MD |
1798 | ERR("Received unknown viewer command (%u)", |
1799 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 1800 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1801 | ret = -1; |
1802 | goto end; | |
1803 | } | |
1804 | ||
1805 | end: | |
1806 | return ret; | |
1807 | } | |
1808 | ||
1809 | static | |
58eb9381 | 1810 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1811 | { |
1812 | int ret; | |
1813 | ||
58eb9381 | 1814 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1815 | |
1816 | ret = close(pollfd); | |
1817 | if (ret < 0) { | |
1818 | ERR("Closing pollfd %d", pollfd); | |
1819 | } | |
1820 | } | |
1821 | ||
d3e2ba59 JD |
1822 | /* |
1823 | * This thread does the actual work | |
1824 | */ | |
1825 | static | |
1826 | void *thread_worker(void *data) | |
1827 | { | |
1828 | int ret, err = -1; | |
1829 | uint32_t nb_fd; | |
d3e2ba59 | 1830 | struct lttng_poll_event events; |
7591bab1 | 1831 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
1832 | struct lttng_ht_iter iter; |
1833 | struct lttng_viewer_cmd recv_hdr; | |
302d8906 | 1834 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
1835 | |
1836 | DBG("[thread] Live viewer relay worker started"); | |
1837 | ||
1838 | rcu_register_thread(); | |
1839 | ||
eea7556c MD |
1840 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1841 | ||
9b5e0863 MD |
1842 | if (testpoint(relayd_thread_live_worker)) { |
1843 | goto error_testpoint; | |
1844 | } | |
1845 | ||
d3e2ba59 | 1846 | /* table of connections indexed on socket */ |
7591bab1 MD |
1847 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1848 | if (!viewer_connections_ht) { | |
1849 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
1850 | } |
1851 | ||
1852 | ret = create_thread_poll_set(&events, 2); | |
1853 | if (ret < 0) { | |
1854 | goto error_poll_create; | |
1855 | } | |
1856 | ||
58eb9381 | 1857 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1858 | if (ret < 0) { |
1859 | goto error; | |
1860 | } | |
1861 | ||
1862 | restart: | |
1863 | while (1) { | |
1864 | int i; | |
1865 | ||
eea7556c MD |
1866 | health_code_update(); |
1867 | ||
d3e2ba59 JD |
1868 | /* Infinite blocking call, waiting for transmission */ |
1869 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1870 | health_poll_entry(); |
d3e2ba59 | 1871 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1872 | health_poll_exit(); |
d3e2ba59 JD |
1873 | if (ret < 0) { |
1874 | /* | |
1875 | * Restart interrupted system call. | |
1876 | */ | |
1877 | if (errno == EINTR) { | |
1878 | goto restart; | |
1879 | } | |
1880 | goto error; | |
1881 | } | |
1882 | ||
1883 | nb_fd = ret; | |
1884 | ||
1885 | /* | |
1886 | * Process control. The control connection is prioritised so we don't | |
1887 | * starve it with high throughput tracing data on the data | |
1888 | * connection. | |
1889 | */ | |
1890 | for (i = 0; i < nb_fd; i++) { | |
1891 | /* Fetch once the poll data */ | |
1892 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1893 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1894 | ||
eea7556c MD |
1895 | health_code_update(); |
1896 | ||
fd20dac9 MD |
1897 | if (!revents) { |
1898 | /* No activity for this FD (poll implementation). */ | |
1899 | continue; | |
1900 | } | |
1901 | ||
d3e2ba59 | 1902 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 1903 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
1904 | if (ret) { |
1905 | err = 0; | |
1906 | goto exit; | |
1907 | } | |
1908 | ||
7591bab1 | 1909 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 1910 | if (pollfd == live_conn_pipe[0]) { |
d3e2ba59 JD |
1911 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1912 | ERR("Relay live pipe error"); | |
1913 | goto error; | |
1914 | } else if (revents & LPOLLIN) { | |
302d8906 JG |
1915 | struct relay_connection *conn; |
1916 | ||
7591bab1 MD |
1917 | ret = lttng_read(live_conn_pipe[0], |
1918 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
1919 | if (ret < 0) { |
1920 | goto error; | |
1921 | } | |
58eb9381 DG |
1922 | lttng_poll_add(&events, conn->sock->fd, |
1923 | LPOLLIN | LPOLLRDHUP); | |
7591bab1 MD |
1924 | connection_ht_add(viewer_connections_ht, conn); |
1925 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
d3e2ba59 | 1926 | } |
58eb9381 | 1927 | } else { |
7591bab1 | 1928 | /* Connection activity. */ |
302d8906 JG |
1929 | struct relay_connection *conn; |
1930 | ||
7591bab1 MD |
1931 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
1932 | if (!conn) { | |
1933 | continue; | |
1934 | } | |
58eb9381 DG |
1935 | |
1936 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1937 | cleanup_connection_pollfd(&events, pollfd); | |
7591bab1 MD |
1938 | /* Put "create" ownership reference. */ |
1939 | connection_put(conn); | |
d3e2ba59 | 1940 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
1941 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
1942 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 1943 | if (ret <= 0) { |
7591bab1 | 1944 | /* Connection closed. */ |
58eb9381 | 1945 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
1946 | /* Put "create" ownership reference. */ |
1947 | connection_put(conn); | |
58eb9381 | 1948 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 1949 | } else { |
58eb9381 | 1950 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
1951 | if (ret < 0) { |
1952 | /* Clear the session on error. */ | |
58eb9381 | 1953 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
1954 | /* Put "create" ownership reference. */ |
1955 | connection_put(conn); | |
d3e2ba59 JD |
1956 | DBG("Viewer connection closed with %d", pollfd); |
1957 | } | |
1958 | } | |
1959 | } | |
7591bab1 MD |
1960 | /* Put local "get_by_sock" reference. */ |
1961 | connection_put(conn); | |
d3e2ba59 JD |
1962 | } |
1963 | } | |
1964 | } | |
1965 | ||
1966 | exit: | |
1967 | error: | |
1968 | lttng_poll_clean(&events); | |
1969 | ||
58eb9381 | 1970 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 1971 | rcu_read_lock(); |
7591bab1 | 1972 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
302d8906 | 1973 | destroy_conn, |
58eb9381 | 1974 | sock_n.node) { |
eea7556c | 1975 | health_code_update(); |
7591bab1 | 1976 | connection_put(destroy_conn); |
d3e2ba59 JD |
1977 | } |
1978 | rcu_read_unlock(); | |
1979 | error_poll_create: | |
7591bab1 MD |
1980 | lttng_ht_destroy(viewer_connections_ht); |
1981 | viewer_connections_ht_error: | |
58eb9381 DG |
1982 | /* Close relay conn pipes */ |
1983 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
1984 | if (err) { |
1985 | DBG("Viewer worker thread exited with error"); | |
1986 | } | |
1987 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 1988 | error_testpoint: |
eea7556c MD |
1989 | if (err) { |
1990 | health_error(); | |
1991 | ERR("Health error occurred in %s", __func__); | |
1992 | } | |
1993 | health_unregister(health_relayd); | |
b4aacfdc MD |
1994 | if (lttng_relay_stop_threads()) { |
1995 | ERR("Error stopping threads"); | |
178a0557 | 1996 | } |
d3e2ba59 JD |
1997 | rcu_unregister_thread(); |
1998 | return NULL; | |
1999 | } | |
2000 | ||
2001 | /* | |
2002 | * Create the relay command pipe to wake thread_manage_apps. | |
2003 | * Closed in cleanup(). | |
2004 | */ | |
58eb9381 | 2005 | static int create_conn_pipe(void) |
d3e2ba59 | 2006 | { |
178a0557 MD |
2007 | return utils_create_pipe_cloexec(live_conn_pipe); |
2008 | } | |
d3e2ba59 | 2009 | |
178a0557 | 2010 | int relayd_live_join(void) |
d3e2ba59 | 2011 | { |
178a0557 | 2012 | int ret, retval = 0; |
d3e2ba59 JD |
2013 | void *status; |
2014 | ||
d3e2ba59 | 2015 | ret = pthread_join(live_listener_thread, &status); |
178a0557 MD |
2016 | if (ret) { |
2017 | errno = ret; | |
d3e2ba59 | 2018 | PERROR("pthread_join live listener"); |
178a0557 | 2019 | retval = -1; |
d3e2ba59 JD |
2020 | } |
2021 | ||
2022 | ret = pthread_join(live_worker_thread, &status); | |
178a0557 MD |
2023 | if (ret) { |
2024 | errno = ret; | |
d3e2ba59 | 2025 | PERROR("pthread_join live worker"); |
178a0557 | 2026 | retval = -1; |
d3e2ba59 JD |
2027 | } |
2028 | ||
2029 | ret = pthread_join(live_dispatcher_thread, &status); | |
178a0557 MD |
2030 | if (ret) { |
2031 | errno = ret; | |
d3e2ba59 | 2032 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2033 | retval = -1; |
d3e2ba59 JD |
2034 | } |
2035 | ||
178a0557 | 2036 | cleanup_relayd_live(); |
d3e2ba59 | 2037 | |
178a0557 | 2038 | return retval; |
d3e2ba59 JD |
2039 | } |
2040 | ||
2041 | /* | |
2042 | * main | |
2043 | */ | |
7591bab1 | 2044 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2045 | { |
178a0557 | 2046 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2047 | void *status; |
2048 | int is_root; | |
2049 | ||
178a0557 MD |
2050 | if (!uri) { |
2051 | retval = -1; | |
2052 | goto exit_init_data; | |
2053 | } | |
d3e2ba59 JD |
2054 | live_uri = uri; |
2055 | ||
d3e2ba59 JD |
2056 | /* Check if daemon is UID = 0 */ |
2057 | is_root = !getuid(); | |
2058 | ||
2059 | if (!is_root) { | |
2060 | if (live_uri->port < 1024) { | |
2061 | ERR("Need to be root to use ports < 1024"); | |
178a0557 MD |
2062 | retval = -1; |
2063 | goto exit_init_data; | |
d3e2ba59 JD |
2064 | } |
2065 | } | |
2066 | ||
2067 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2068 | if (create_conn_pipe()) { |
2069 | retval = -1; | |
2070 | goto exit_init_data; | |
d3e2ba59 JD |
2071 | } |
2072 | ||
2073 | /* Init relay command queue. */ | |
8bdee6e2 | 2074 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2075 | |
2076 | /* Set up max poll set size */ | |
25b397f9 MD |
2077 | if (lttng_poll_set_max_size()) { |
2078 | retval = -1; | |
2079 | goto exit_init_data; | |
2080 | } | |
d3e2ba59 JD |
2081 | |
2082 | /* Setup the dispatcher thread */ | |
2083 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2084 | thread_dispatcher, (void *) NULL); | |
178a0557 MD |
2085 | if (ret) { |
2086 | errno = ret; | |
d3e2ba59 | 2087 | PERROR("pthread_create viewer dispatcher"); |
178a0557 MD |
2088 | retval = -1; |
2089 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2090 | } |
2091 | ||
2092 | /* Setup the worker thread */ | |
2093 | ret = pthread_create(&live_worker_thread, NULL, | |
7591bab1 | 2094 | thread_worker, NULL); |
178a0557 MD |
2095 | if (ret) { |
2096 | errno = ret; | |
d3e2ba59 | 2097 | PERROR("pthread_create viewer worker"); |
178a0557 MD |
2098 | retval = -1; |
2099 | goto exit_worker_thread; | |
d3e2ba59 JD |
2100 | } |
2101 | ||
2102 | /* Setup the listener thread */ | |
2103 | ret = pthread_create(&live_listener_thread, NULL, | |
2104 | thread_listener, (void *) NULL); | |
178a0557 MD |
2105 | if (ret) { |
2106 | errno = ret; | |
d3e2ba59 | 2107 | PERROR("pthread_create viewer listener"); |
178a0557 MD |
2108 | retval = -1; |
2109 | goto exit_listener_thread; | |
d3e2ba59 JD |
2110 | } |
2111 | ||
178a0557 MD |
2112 | /* |
2113 | * All OK, started all threads. | |
2114 | */ | |
2115 | return retval; | |
2116 | ||
9911d21b JG |
2117 | /* |
2118 | * Join on the live_listener_thread should anything be added after | |
2119 | * the live_listener thread's creation. | |
2120 | */ | |
d3e2ba59 | 2121 | |
178a0557 | 2122 | exit_listener_thread: |
d3e2ba59 | 2123 | |
d3e2ba59 | 2124 | ret = pthread_join(live_worker_thread, &status); |
178a0557 MD |
2125 | if (ret) { |
2126 | errno = ret; | |
d3e2ba59 | 2127 | PERROR("pthread_join live worker"); |
178a0557 | 2128 | retval = -1; |
d3e2ba59 | 2129 | } |
178a0557 | 2130 | exit_worker_thread: |
d3e2ba59 | 2131 | |
d3e2ba59 | 2132 | ret = pthread_join(live_dispatcher_thread, &status); |
178a0557 MD |
2133 | if (ret) { |
2134 | errno = ret; | |
d3e2ba59 | 2135 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2136 | retval = -1; |
d3e2ba59 | 2137 | } |
178a0557 | 2138 | exit_dispatcher_thread: |
d3e2ba59 | 2139 | |
178a0557 MD |
2140 | exit_init_data: |
2141 | cleanup_relayd_live(); | |
d3e2ba59 | 2142 | |
178a0557 | 2143 | return retval; |
d3e2ba59 | 2144 | } |