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 | ||
584fc280 | 544 | if (revents & LPOLLIN) { |
d3e2ba59 | 545 | /* |
9a78c92e MD |
546 | * A new connection is requested, therefore a |
547 | * viewer connection is allocated in this | |
548 | * thread, enqueued to a global queue and | |
549 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 550 | */ |
58eb9381 DG |
551 | int val = 1; |
552 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
553 | struct lttcomm_sock *newsock; |
554 | ||
d3e2ba59 JD |
555 | newsock = live_control_sock->ops->accept(live_control_sock); |
556 | if (!newsock) { | |
557 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
558 | goto error; |
559 | } | |
560 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 561 | |
d3e2ba59 | 562 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 563 | sizeof(val)); |
d3e2ba59 JD |
564 | if (ret < 0) { |
565 | PERROR("setsockopt inet"); | |
566 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
567 | goto error; |
568 | } | |
9a78c92e MD |
569 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
570 | if (!new_conn) { | |
571 | lttcomm_destroy_sock(newsock); | |
572 | goto error; | |
573 | } | |
574 | /* Ownership assumed by the connection. */ | |
575 | newsock = NULL; | |
d3e2ba59 | 576 | |
58eb9381 | 577 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
578 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
579 | &new_conn->qnode); | |
d3e2ba59 JD |
580 | |
581 | /* | |
9a78c92e MD |
582 | * Wake the dispatch queue futex. |
583 | * Implicit memory barrier with the | |
584 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 585 | */ |
58eb9381 | 586 | futex_nto1_wake(&viewer_conn_queue.futex); |
584fc280 MD |
587 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
588 | ERR("socket poll error"); | |
589 | goto error; | |
590 | } else { | |
591 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
592 | goto error; | |
d3e2ba59 JD |
593 | } |
594 | } | |
595 | } | |
596 | ||
597 | exit: | |
598 | error: | |
599 | error_poll_add: | |
9b5e0863 | 600 | error_testpoint: |
d3e2ba59 JD |
601 | lttng_poll_clean(&events); |
602 | error_create_poll: | |
603 | if (live_control_sock->fd >= 0) { | |
604 | ret = live_control_sock->ops->close(live_control_sock); | |
605 | if (ret) { | |
606 | PERROR("close"); | |
607 | } | |
608 | } | |
609 | lttcomm_destroy_sock(live_control_sock); | |
610 | error_sock_control: | |
611 | if (err) { | |
eea7556c | 612 | health_error(); |
d3e2ba59 JD |
613 | DBG("Live viewer listener thread exited with error"); |
614 | } | |
eea7556c | 615 | health_unregister(health_relayd); |
d3e2ba59 | 616 | DBG("Live viewer listener thread cleanup complete"); |
770f96f4 MD |
617 | if (lttng_relay_stop_threads()) { |
618 | ERR("Error stopping threads"); | |
77c54fed | 619 | } |
d3e2ba59 JD |
620 | return NULL; |
621 | } | |
622 | ||
623 | /* | |
624 | * This thread manages the dispatching of the requests to worker threads | |
625 | */ | |
626 | static | |
627 | void *thread_dispatcher(void *data) | |
628 | { | |
6cd525e8 MD |
629 | int err = -1; |
630 | ssize_t ret; | |
8bdee6e2 | 631 | struct cds_wfcq_node *node; |
58eb9381 | 632 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
633 | |
634 | DBG("[thread] Live viewer relay dispatcher started"); | |
635 | ||
eea7556c MD |
636 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
637 | ||
9b5e0863 MD |
638 | if (testpoint(relayd_thread_live_dispatcher)) { |
639 | goto error_testpoint; | |
640 | } | |
641 | ||
eea7556c MD |
642 | health_code_update(); |
643 | ||
d3e2ba59 | 644 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
645 | health_code_update(); |
646 | ||
d3e2ba59 | 647 | /* Atomically prepare the queue futex */ |
58eb9381 | 648 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
649 | |
650 | do { | |
eea7556c MD |
651 | health_code_update(); |
652 | ||
d3e2ba59 | 653 | /* Dequeue commands */ |
8bdee6e2 SM |
654 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
655 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
656 | if (node == NULL) { |
657 | DBG("Woken up but nothing in the live-viewer " | |
658 | "relay command queue"); | |
659 | /* Continue thread execution */ | |
660 | break; | |
661 | } | |
58eb9381 | 662 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 663 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 664 | conn->sock->fd); |
d3e2ba59 JD |
665 | |
666 | /* | |
9a78c92e MD |
667 | * Inform worker thread of the new request. This |
668 | * call is blocking so we can be assured that | |
669 | * the data will be read at some point in time | |
670 | * or wait to the end of the world :) | |
d3e2ba59 | 671 | */ |
58eb9381 DG |
672 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
673 | if (ret < 0) { | |
674 | PERROR("write conn pipe"); | |
9a78c92e | 675 | connection_put(conn); |
d3e2ba59 JD |
676 | goto error; |
677 | } | |
678 | } while (node != NULL); | |
679 | ||
680 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 681 | health_poll_entry(); |
58eb9381 | 682 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 683 | health_poll_exit(); |
d3e2ba59 JD |
684 | } |
685 | ||
eea7556c MD |
686 | /* Normal exit, no error */ |
687 | err = 0; | |
688 | ||
d3e2ba59 | 689 | error: |
9b5e0863 | 690 | error_testpoint: |
eea7556c MD |
691 | if (err) { |
692 | health_error(); | |
693 | ERR("Health error occurred in %s", __func__); | |
694 | } | |
695 | health_unregister(health_relayd); | |
d3e2ba59 | 696 | DBG("Live viewer dispatch thread dying"); |
770f96f4 MD |
697 | if (lttng_relay_stop_threads()) { |
698 | ERR("Error stopping threads"); | |
77c54fed | 699 | } |
d3e2ba59 JD |
700 | return NULL; |
701 | } | |
702 | ||
703 | /* | |
704 | * Establish connection with the viewer and check the versions. | |
705 | * | |
706 | * Return 0 on success or else negative value. | |
707 | */ | |
708 | static | |
58eb9381 | 709 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
710 | { |
711 | int ret; | |
712 | struct lttng_viewer_connect reply, msg; | |
713 | ||
58eb9381 | 714 | conn->version_check_done = 1; |
d3e2ba59 | 715 | |
eea7556c MD |
716 | health_code_update(); |
717 | ||
2f8f53af DG |
718 | DBG("Viewer is establishing a connection to the relayd."); |
719 | ||
58eb9381 | 720 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 721 | if (ret < 0) { |
d3e2ba59 JD |
722 | goto end; |
723 | } | |
724 | ||
eea7556c MD |
725 | health_code_update(); |
726 | ||
f46b2ce6 | 727 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
728 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
729 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
730 | ||
731 | /* Major versions must be the same */ | |
732 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
733 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
734 | reply.major, be32toh(msg.major)); | |
72180669 | 735 | ret = -1; |
d3e2ba59 JD |
736 | goto end; |
737 | } | |
738 | ||
58eb9381 | 739 | conn->major = reply.major; |
d3e2ba59 JD |
740 | /* We adapt to the lowest compatible version */ |
741 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 742 | conn->minor = reply.minor; |
d3e2ba59 | 743 | } else { |
58eb9381 | 744 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
745 | } |
746 | ||
c4e361a4 | 747 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 748 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 749 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 750 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
751 | } else { |
752 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
753 | ret = -1; | |
754 | goto end; | |
755 | } | |
756 | ||
757 | reply.major = htobe32(reply.major); | |
758 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 759 | if (conn->type == RELAY_VIEWER_COMMAND) { |
19eba299 | 760 | /* |
9a78c92e MD |
761 | * Increment outside of htobe64 macro, because the argument can |
762 | * be used more than once within the macro, and thus the | |
763 | * operation may be undefined. | |
19eba299 | 764 | */ |
9a78c92e | 765 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
19eba299 | 766 | last_relay_viewer_session_id++; |
9a78c92e | 767 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
19eba299 | 768 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 769 | } |
eea7556c MD |
770 | |
771 | health_code_update(); | |
772 | ||
58eb9381 | 773 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 774 | if (ret < 0) { |
2f8f53af | 775 | goto end; |
d3e2ba59 JD |
776 | } |
777 | ||
eea7556c MD |
778 | health_code_update(); |
779 | ||
58eb9381 | 780 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
781 | ret = 0; |
782 | ||
783 | end: | |
784 | return ret; | |
785 | } | |
786 | ||
787 | /* | |
788 | * Send the viewer the list of current sessions. | |
9a78c92e MD |
789 | * We need to create a copy of the hash table content because otherwise |
790 | * we cannot assume the number of entries stays the same between getting | |
791 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
792 | * |
793 | * Return 0 on success or else a negative value. | |
794 | */ | |
795 | static | |
58eb9381 | 796 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
797 | { |
798 | int ret; | |
799 | struct lttng_viewer_list_sessions session_list; | |
d3e2ba59 | 800 | struct lttng_ht_iter iter; |
d3e2ba59 | 801 | struct relay_session *session; |
9a78c92e MD |
802 | struct lttng_viewer_session *send_session_buf = NULL; |
803 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
804 | uint32_t count = 0; | |
d3e2ba59 JD |
805 | |
806 | DBG("List sessions received"); | |
807 | ||
9a78c92e MD |
808 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
809 | if (!send_session_buf) { | |
810 | return -1; | |
d3e2ba59 JD |
811 | } |
812 | ||
9a78c92e MD |
813 | rcu_read_lock(); |
814 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 815 | session_n.node) { |
9a78c92e | 816 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 817 | |
eea7556c MD |
818 | health_code_update(); |
819 | ||
9a78c92e MD |
820 | if (count >= buf_count) { |
821 | struct lttng_viewer_session *newbuf; | |
822 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 823 | |
9a78c92e MD |
824 | newbuf = realloc(send_session_buf, |
825 | new_buf_count * sizeof(*send_session_buf)); | |
826 | if (!newbuf) { | |
827 | ret = -1; | |
828 | rcu_read_unlock(); | |
829 | goto end_free; | |
830 | } | |
831 | send_session_buf = newbuf; | |
832 | buf_count = new_buf_count; | |
6763619c | 833 | } |
9a78c92e MD |
834 | send_session = &send_session_buf[count]; |
835 | strncpy(send_session->session_name, session->session_name, | |
836 | sizeof(send_session->session_name)); | |
837 | strncpy(send_session->hostname, session->hostname, | |
838 | sizeof(send_session->hostname)); | |
839 | send_session->id = htobe64(session->id); | |
840 | send_session->live_timer = htobe32(session->live_timer); | |
841 | if (session->viewer_attached) { | |
842 | send_session->clients = htobe32(1); | |
843 | } else { | |
844 | send_session->clients = htobe32(0); | |
d227d5bd | 845 | } |
9a78c92e MD |
846 | send_session->streams = htobe32(session->stream_count); |
847 | count++; | |
848 | } | |
849 | rcu_read_unlock(); | |
d227d5bd | 850 | |
9a78c92e | 851 | session_list.sessions_count = htobe32(count); |
d227d5bd | 852 | |
9a78c92e | 853 | health_code_update(); |
d227d5bd | 854 | |
9a78c92e MD |
855 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
856 | if (ret < 0) { | |
857 | goto end_free; | |
d227d5bd | 858 | } |
d227d5bd | 859 | |
9a78c92e | 860 | health_code_update(); |
d227d5bd | 861 | |
9a78c92e MD |
862 | ret = send_response(conn->sock, send_session_buf, |
863 | count * sizeof(*send_session_buf)); | |
864 | if (ret < 0) { | |
865 | goto end_free; | |
d227d5bd | 866 | } |
9a78c92e | 867 | health_code_update(); |
d227d5bd | 868 | |
9a78c92e MD |
869 | ret = 0; |
870 | end_free: | |
871 | free(send_session_buf); | |
872 | return ret; | |
d227d5bd JD |
873 | } |
874 | ||
80e8027a | 875 | /* |
9a78c92e | 876 | * Send the viewer the list of current streams. |
80e8027a JD |
877 | */ |
878 | static | |
58eb9381 | 879 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
880 | { |
881 | int ret, send_streams = 0; | |
9a78c92e | 882 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
883 | struct lttng_viewer_new_streams_request request; |
884 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 885 | struct relay_session *session; |
6763619c | 886 | uint64_t session_id; |
11436961 | 887 | bool closed = false; |
80e8027a | 888 | |
58eb9381 | 889 | assert(conn); |
80e8027a JD |
890 | |
891 | DBG("Get new streams received"); | |
892 | ||
80e8027a JD |
893 | health_code_update(); |
894 | ||
2f8f53af | 895 | /* Receive the request from the connected client. */ |
58eb9381 | 896 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 897 | if (ret < 0) { |
80e8027a JD |
898 | goto error; |
899 | } | |
6763619c | 900 | session_id = be64toh(request.session_id); |
80e8027a JD |
901 | |
902 | health_code_update(); | |
903 | ||
53efb85a MD |
904 | memset(&response, 0, sizeof(response)); |
905 | ||
9a78c92e | 906 | session = session_get_by_id(session_id); |
2f8f53af | 907 | if (!session) { |
6763619c | 908 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 909 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
910 | goto send_reply; |
911 | } | |
912 | ||
9a78c92e | 913 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
80e8027a | 914 | send_streams = 0; |
c4e361a4 | 915 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
916 | goto send_reply; |
917 | } | |
918 | ||
6763619c JD |
919 | send_streams = 1; |
920 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
921 | ||
9a78c92e | 922 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
11436961 | 923 | &nb_created, &closed); |
2f8f53af | 924 | if (ret < 0) { |
9a78c92e | 925 | goto end_put_session; |
2f8f53af DG |
926 | } |
927 | /* Only send back the newly created streams with the unsent ones. */ | |
928 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
929 | response.streams_count = htobe32(nb_streams); |
930 | ||
4479f682 | 931 | /* |
64bda0b4 MD |
932 | * If the session is closed, HUP when there are no more streams |
933 | * with data. | |
4479f682 | 934 | */ |
11436961 | 935 | if (closed && nb_total == 0) { |
4479f682 | 936 | send_streams = 0; |
11436961 | 937 | response.streams_count = 0; |
4479f682 JD |
938 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
939 | goto send_reply; | |
940 | } | |
941 | ||
80e8027a JD |
942 | send_reply: |
943 | health_code_update(); | |
58eb9381 | 944 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 945 | if (ret < 0) { |
9a78c92e | 946 | goto end_put_session; |
80e8027a JD |
947 | } |
948 | health_code_update(); | |
949 | ||
950 | /* | |
9a78c92e MD |
951 | * Unknown or empty session, just return gracefully, the viewer |
952 | * knows what is happening. | |
80e8027a JD |
953 | */ |
954 | if (!send_streams || !nb_streams) { | |
955 | ret = 0; | |
9a78c92e | 956 | goto end_put_session; |
80e8027a JD |
957 | } |
958 | ||
2f8f53af | 959 | /* |
9a78c92e MD |
960 | * Send stream and *DON'T* ignore the sent flag so every viewer |
961 | * streams that were not sent from that point will be sent to | |
962 | * the viewer. | |
2f8f53af | 963 | */ |
58eb9381 | 964 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af | 965 | if (ret < 0) { |
9a78c92e | 966 | goto end_put_session; |
80e8027a JD |
967 | } |
968 | ||
9a78c92e MD |
969 | end_put_session: |
970 | if (session) { | |
971 | session_put(session); | |
972 | } | |
80e8027a JD |
973 | error: |
974 | return ret; | |
975 | } | |
976 | ||
d3e2ba59 JD |
977 | /* |
978 | * Send the viewer the list of current sessions. | |
979 | */ | |
980 | static | |
58eb9381 | 981 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 982 | { |
2f8f53af DG |
983 | int send_streams = 0; |
984 | ssize_t ret; | |
80e8027a | 985 | uint32_t nb_streams = 0; |
2f8f53af | 986 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
987 | struct lttng_viewer_attach_session_request request; |
988 | struct lttng_viewer_attach_session_response response; | |
9a78c92e | 989 | struct relay_session *session = NULL; |
11436961 | 990 | bool closed = false; |
d3e2ba59 | 991 | |
58eb9381 | 992 | assert(conn); |
d3e2ba59 | 993 | |
eea7556c MD |
994 | health_code_update(); |
995 | ||
2f8f53af | 996 | /* Receive the request from the connected client. */ |
58eb9381 | 997 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 998 | if (ret < 0) { |
d3e2ba59 JD |
999 | goto error; |
1000 | } | |
1001 | ||
eea7556c MD |
1002 | health_code_update(); |
1003 | ||
53efb85a MD |
1004 | memset(&response, 0, sizeof(response)); |
1005 | ||
c3b7390b JD |
1006 | if (!conn->viewer_session) { |
1007 | DBG("Client trying to attach before creating a live viewer session"); | |
1008 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1009 | goto send_reply; | |
1010 | } | |
1011 | ||
9a78c92e | 1012 | session = session_get_by_id(be64toh(request.session_id)); |
2f8f53af | 1013 | if (!session) { |
d3e2ba59 JD |
1014 | DBG("Relay session %" PRIu64 " not found", |
1015 | be64toh(request.session_id)); | |
c4e361a4 | 1016 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1017 | goto send_reply; |
1018 | } | |
9a78c92e MD |
1019 | DBG("Attach session ID %" PRIu64 " received", |
1020 | be64toh(request.session_id)); | |
d3e2ba59 | 1021 | |
9a78c92e | 1022 | if (session->live_timer == 0) { |
d3e2ba59 | 1023 | DBG("Not live session"); |
c4e361a4 | 1024 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1025 | goto send_reply; |
9a78c92e MD |
1026 | } |
1027 | ||
1028 | send_streams = 1; | |
1029 | ret = viewer_session_attach(conn->viewer_session, session); | |
1030 | if (ret) { | |
1031 | DBG("Already a viewer attached"); | |
1032 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); | |
1033 | goto send_reply; | |
d3e2ba59 JD |
1034 | } |
1035 | ||
1036 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1037 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1038 | case LTTNG_VIEWER_SEEK_LAST: | |
9a78c92e | 1039 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1040 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1041 | break; |
1042 | default: | |
1043 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1044 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1045 | send_streams = 0; |
1046 | goto send_reply; | |
1047 | } | |
1048 | ||
11436961 MD |
1049 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, |
1050 | NULL, &closed); | |
2f8f53af | 1051 | if (ret < 0) { |
9a78c92e | 1052 | goto end_put_session; |
d3e2ba59 | 1053 | } |
2f8f53af | 1054 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 | 1055 | |
11436961 MD |
1056 | /* |
1057 | * If the session is closed when the viewer is attaching, it | |
1058 | * means some of the streams may have been concurrently removed, | |
1059 | * so we don't allow the viewer to attach, even if there are | |
1060 | * streams available. | |
1061 | */ | |
1062 | if (closed) { | |
1063 | send_streams = 0; | |
1064 | response.streams_count = 0; | |
1065 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
1066 | goto send_reply; | |
1067 | } | |
1068 | ||
d3e2ba59 | 1069 | send_reply: |
eea7556c | 1070 | health_code_update(); |
58eb9381 | 1071 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1072 | if (ret < 0) { |
9a78c92e | 1073 | goto end_put_session; |
d3e2ba59 | 1074 | } |
eea7556c | 1075 | health_code_update(); |
d3e2ba59 JD |
1076 | |
1077 | /* | |
9a78c92e MD |
1078 | * Unknown or empty session, just return gracefully, the viewer |
1079 | * knows what is happening. | |
d3e2ba59 | 1080 | */ |
157df586 | 1081 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1082 | ret = 0; |
9a78c92e | 1083 | goto end_put_session; |
d3e2ba59 JD |
1084 | } |
1085 | ||
2f8f53af | 1086 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1087 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af | 1088 | if (ret < 0) { |
9a78c92e | 1089 | goto end_put_session; |
d3e2ba59 | 1090 | } |
d3e2ba59 | 1091 | |
9a78c92e MD |
1092 | end_put_session: |
1093 | if (session) { | |
1094 | session_put(session); | |
1095 | } | |
4a9daf17 JD |
1096 | error: |
1097 | return ret; | |
1098 | } | |
1099 | ||
878c34cf DG |
1100 | /* |
1101 | * Open the index file if needed for the given vstream. | |
1102 | * | |
9a78c92e MD |
1103 | * If an index file is successfully opened, the vstream index_fd set with |
1104 | * it. | |
878c34cf DG |
1105 | * |
1106 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
9a78c92e MD |
1107 | * |
1108 | * Called with rstream lock held. | |
878c34cf DG |
1109 | */ |
1110 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1111 | struct relay_stream *rstream) | |
1112 | { | |
1113 | int ret = 0; | |
1114 | ||
9a78c92e | 1115 | if (vstream->index_fd) { |
878c34cf DG |
1116 | goto end; |
1117 | } | |
1118 | ||
1119 | /* | |
9a78c92e | 1120 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1121 | */ |
c00978f1 | 1122 | if (rstream->index_received_seqcount == 0) { |
878c34cf DG |
1123 | ret = -ENOENT; |
1124 | goto end; | |
1125 | } | |
1126 | ret = index_open(vstream->path_name, vstream->channel_name, | |
9a78c92e MD |
1127 | vstream->stream->tracefile_count, |
1128 | vstream->current_tracefile_id); | |
878c34cf | 1129 | if (ret >= 0) { |
9a78c92e MD |
1130 | vstream->index_fd = stream_fd_create(ret); |
1131 | if (!vstream->index_fd) { | |
1132 | if (close(ret)) { | |
1133 | PERROR("close"); | |
1134 | } | |
1135 | ret = -1; | |
1136 | } else { | |
1137 | ret = 0; | |
1138 | } | |
878c34cf DG |
1139 | goto end; |
1140 | } | |
1141 | ||
1142 | end: | |
1143 | return ret; | |
1144 | } | |
1145 | ||
1146 | /* | |
9a78c92e MD |
1147 | * Check the status of the index for the given stream. This function |
1148 | * updates the index structure if needed and can put (close) the vstream | |
1149 | * in the HUP situation. | |
1150 | * | |
1151 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1152 | * that the index has been updated and is ready to be sent to the | |
1153 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1154 | * |
9a78c92e | 1155 | * Called with rstream lock held. |
878c34cf DG |
1156 | */ |
1157 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1158 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1159 | struct lttng_viewer_index *index) | |
1160 | { | |
1161 | int ret; | |
1162 | ||
9a78c92e | 1163 | if (trace->session->connection_closed |
c00978f1 MD |
1164 | && rstream->index_received_seqcount |
1165 | == vstream->index_sent_seqcount) { | |
9a78c92e MD |
1166 | /* Last index sent and session connection is closed. */ |
1167 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1168 | goto hup; | |
1169 | } else if (rstream->beacon_ts_end != -1ULL && | |
c00978f1 MD |
1170 | rstream->index_received_seqcount |
1171 | == vstream->index_sent_seqcount) { | |
9a78c92e MD |
1172 | /* |
1173 | * We've received a synchronization beacon and the last index | |
1174 | * available has been sent, the index for now is inactive. | |
1175 | * | |
1176 | * In this case, we have received a beacon which allows us to | |
1177 | * inform the client of a time interval during which we can | |
1178 | * guarantee that there are no events to read (and never will | |
1179 | * be). | |
1180 | */ | |
1181 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1182 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1183 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
1184 | goto index_ready; | |
c00978f1 MD |
1185 | } else if (rstream->index_received_seqcount |
1186 | == vstream->index_sent_seqcount) { | |
9a78c92e | 1187 | /* |
c00978f1 MD |
1188 | * This checks whether received == sent seqcount. In |
1189 | * this case, we have not received a beacon. Therefore, | |
1190 | * we can only ask the client to retry later. | |
9a78c92e MD |
1191 | */ |
1192 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1193 | goto index_ready; | |
c00978f1 MD |
1194 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
1195 | vstream->current_tracefile_id, | |
1196 | vstream->index_sent_seqcount)) { | |
9a78c92e | 1197 | /* |
c00978f1 MD |
1198 | * The next index we want to send cannot be read either |
1199 | * because we need to perform a rotation, or due to | |
1200 | * the producer having overwritten its trace file. | |
9a78c92e | 1201 | */ |
c00978f1 | 1202 | DBG("Viewer stream %" PRIu64 " rotation", |
9a78c92e MD |
1203 | vstream->stream->stream_handle); |
1204 | ret = viewer_stream_rotate(vstream); | |
1205 | if (ret < 0) { | |
1206 | goto end; | |
1207 | } else if (ret == 1) { | |
1208 | /* EOF across entire stream. */ | |
1209 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1210 | goto hup; | |
1211 | } | |
9a78c92e | 1212 | /* |
c00978f1 MD |
1213 | * If we have been pushed due to overwrite, it |
1214 | * necessarily means there is data that can be read in | |
1215 | * the stream. If we rotated because we reached the end | |
1216 | * of a tracefile, it means the following tracefile | |
1217 | * needs to contain at least one index, else we would | |
1218 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1219 | * viewer. The updated index_sent_seqcount needs to | |
1220 | * point to a readable index entry now. | |
1221 | * | |
1222 | * In the case where we "rotate" on a single file, we | |
1223 | * can end up in a case where the requested index is | |
1224 | * still unavailable. | |
9a78c92e | 1225 | */ |
c00978f1 MD |
1226 | if (rstream->tracefile_count == 1 && |
1227 | !tracefile_array_seq_in_file( | |
1228 | rstream->tfa, | |
1229 | vstream->current_tracefile_id, | |
1230 | vstream->index_sent_seqcount)) { | |
1231 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1232 | goto index_ready; | |
878c34cf | 1233 | } |
c00978f1 MD |
1234 | assert(tracefile_array_seq_in_file(rstream->tfa, |
1235 | vstream->current_tracefile_id, | |
1236 | vstream->index_sent_seqcount)); | |
878c34cf | 1237 | } |
c00978f1 MD |
1238 | /* ret == 0 means successful so we continue. */ |
1239 | ret = 0; | |
9a78c92e | 1240 | end: |
878c34cf DG |
1241 | return ret; |
1242 | ||
1243 | hup: | |
9a78c92e | 1244 | viewer_stream_put(vstream); |
878c34cf DG |
1245 | index_ready: |
1246 | return 1; | |
1247 | } | |
1248 | ||
d3e2ba59 JD |
1249 | /* |
1250 | * Send the next index for a stream. | |
1251 | * | |
1252 | * Return 0 on success or else a negative value. | |
1253 | */ | |
1254 | static | |
58eb9381 | 1255 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1256 | { |
1257 | int ret; | |
878c34cf | 1258 | ssize_t read_ret; |
d3e2ba59 JD |
1259 | struct lttng_viewer_get_next_index request_index; |
1260 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1261 | struct ctf_packet_index packet_index; |
9a78c92e MD |
1262 | struct relay_viewer_stream *vstream = NULL; |
1263 | struct relay_stream *rstream = NULL; | |
1264 | struct ctf_trace *ctf_trace = NULL; | |
1265 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1266 | |
58eb9381 | 1267 | assert(conn); |
d3e2ba59 JD |
1268 | |
1269 | DBG("Viewer get next index"); | |
1270 | ||
9a78c92e | 1271 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1272 | health_code_update(); |
2f8f53af | 1273 | |
58eb9381 | 1274 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1275 | if (ret < 0) { |
d3e2ba59 JD |
1276 | goto end; |
1277 | } | |
eea7556c | 1278 | health_code_update(); |
d3e2ba59 | 1279 | |
9a78c92e | 1280 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1281 | if (!vstream) { |
c00978f1 MD |
1282 | DBG("Client requested index of unknown stream id %" PRIu64, |
1283 | be64toh(request_index.stream_id)); | |
387137a7 MD |
1284 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1285 | goto send_reply; | |
2a174661 DG |
1286 | } |
1287 | ||
9a78c92e MD |
1288 | /* Use back. ref. Protected by refcounts. */ |
1289 | rstream = vstream->stream; | |
1290 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1291 | |
9a78c92e MD |
1292 | /* metadata_viewer_stream may be NULL. */ |
1293 | metadata_viewer_stream = | |
1294 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1295 | |
9a78c92e | 1296 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1297 | |
1298 | /* | |
1299 | * The viewer should not ask for index on metadata stream. | |
1300 | */ | |
9a78c92e | 1301 | if (rstream->is_metadata) { |
c4e361a4 | 1302 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1303 | goto send_reply; |
1304 | } | |
1305 | ||
878c34cf DG |
1306 | /* Try to open an index if one is needed for that stream. */ |
1307 | ret = try_open_index(vstream, rstream); | |
1308 | if (ret < 0) { | |
0e6830aa | 1309 | if (ret == -ENOENT) { |
d3e2ba59 | 1310 | /* |
9a78c92e MD |
1311 | * The index is created only when the first data |
1312 | * packet arrives, it might not be ready at the | |
1313 | * beginning of the session | |
d3e2ba59 | 1314 | */ |
c4e361a4 | 1315 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1316 | } else { |
1317 | /* Unhandled error. */ | |
c4e361a4 | 1318 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1319 | } |
878c34cf | 1320 | goto send_reply; |
d3e2ba59 JD |
1321 | } |
1322 | ||
878c34cf | 1323 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1324 | if (ret < 0) { |
9a78c92e | 1325 | goto error_put; |
878c34cf DG |
1326 | } else if (ret == 1) { |
1327 | /* | |
9a78c92e MD |
1328 | * We have no index to send and check_index_status has populated |
1329 | * viewer_index's status. | |
878c34cf | 1330 | */ |
d3e2ba59 JD |
1331 | goto send_reply; |
1332 | } | |
9a78c92e | 1333 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1334 | assert(!ret); |
d3e2ba59 | 1335 | |
9a78c92e MD |
1336 | /* |
1337 | * vstream->stream_fd may be NULL if it has been closed by | |
1338 | * tracefile rotation, or if we are at the beginning of the | |
1339 | * stream. We open the data stream file here to protect against | |
1340 | * overwrite caused by tracefile rotation (in association with | |
1341 | * unlink performed before overwrite). | |
1342 | */ | |
1343 | if (!vstream->stream_fd) { | |
1344 | char fullpath[PATH_MAX]; | |
1345 | ||
1346 | if (vstream->stream->tracefile_count > 0) { | |
1347 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, | |
1348 | vstream->path_name, | |
1349 | vstream->channel_name, | |
1350 | vstream->current_tracefile_id); | |
1351 | } else { | |
1352 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", | |
1353 | vstream->path_name, | |
1354 | vstream->channel_name); | |
1355 | } | |
1356 | if (ret < 0) { | |
1357 | goto error_put; | |
1358 | } | |
1359 | ret = open(fullpath, O_RDONLY); | |
1360 | if (ret < 0) { | |
1361 | PERROR("Relay opening trace file"); | |
1362 | goto error_put; | |
1363 | } | |
1364 | vstream->stream_fd = stream_fd_create(ret); | |
1365 | if (!vstream->stream_fd) { | |
1366 | if (close(ret)) { | |
1367 | PERROR("close"); | |
1368 | } | |
1369 | goto error_put; | |
1370 | } | |
d3e2ba59 JD |
1371 | } |
1372 | ||
f04a971b | 1373 | ret = check_new_streams(conn); |
4a9daf17 | 1374 | if (ret < 0) { |
9a78c92e MD |
1375 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1376 | goto send_reply; | |
4a9daf17 JD |
1377 | } else if (ret == 1) { |
1378 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1379 | } | |
1380 | ||
9a78c92e | 1381 | read_ret = lttng_read(vstream->index_fd->fd, &packet_index, |
6cd525e8 | 1382 | sizeof(packet_index)); |
9a78c92e MD |
1383 | if (read_ret < sizeof(packet_index)) { |
1384 | ERR("Relay reading index file %d returned %zd", | |
1385 | vstream->index_fd->fd, read_ret); | |
1386 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
6b6b9a5a | 1387 | goto send_reply; |
d3e2ba59 | 1388 | } else { |
c4e361a4 | 1389 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
c00978f1 | 1390 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1391 | } |
1392 | ||
1393 | /* | |
1394 | * Indexes are stored in big endian, no need to switch before sending. | |
1395 | */ | |
9a78c92e MD |
1396 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1397 | rstream->stream_handle, | |
1398 | be64toh(packet_index.offset)); | |
d3e2ba59 JD |
1399 | viewer_index.offset = packet_index.offset; |
1400 | viewer_index.packet_size = packet_index.packet_size; | |
1401 | viewer_index.content_size = packet_index.content_size; | |
1402 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1403 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1404 | viewer_index.events_discarded = packet_index.events_discarded; | |
1405 | viewer_index.stream_id = packet_index.stream_id; | |
1406 | ||
1407 | send_reply: | |
387137a7 MD |
1408 | if (rstream) { |
1409 | pthread_mutex_unlock(&rstream->lock); | |
1410 | } | |
9a78c92e MD |
1411 | |
1412 | if (metadata_viewer_stream) { | |
1413 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1414 | DBG("get next index metadata check: recv %" PRIu64 | |
1415 | " sent %" PRIu64, | |
1416 | metadata_viewer_stream->stream->metadata_received, | |
1417 | metadata_viewer_stream->metadata_sent); | |
1418 | if (!metadata_viewer_stream->stream->metadata_received || | |
1419 | metadata_viewer_stream->stream->metadata_received > | |
1420 | metadata_viewer_stream->metadata_sent) { | |
1421 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1422 | } | |
1423 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1424 | } | |
1425 | ||
d3e2ba59 | 1426 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1427 | health_code_update(); |
2f8f53af | 1428 | |
58eb9381 | 1429 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1430 | if (ret < 0) { |
9a78c92e | 1431 | goto end; |
d3e2ba59 | 1432 | } |
eea7556c | 1433 | health_code_update(); |
d3e2ba59 | 1434 | |
16fa7c98 MD |
1435 | if (vstream) { |
1436 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
c00978f1 | 1437 | vstream->index_sent_seqcount, |
16fa7c98 MD |
1438 | vstream->stream->stream_handle); |
1439 | } | |
d3e2ba59 | 1440 | end: |
9a78c92e MD |
1441 | if (metadata_viewer_stream) { |
1442 | viewer_stream_put(metadata_viewer_stream); | |
1443 | } | |
1444 | if (vstream) { | |
1445 | viewer_stream_put(vstream); | |
1446 | } | |
1447 | return ret; | |
1448 | ||
1449 | error_put: | |
1450 | pthread_mutex_unlock(&rstream->lock); | |
1451 | if (metadata_viewer_stream) { | |
1452 | viewer_stream_put(metadata_viewer_stream); | |
1453 | } | |
1454 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1455 | return ret; |
1456 | } | |
1457 | ||
1458 | /* | |
1459 | * Send the next index for a stream | |
1460 | * | |
1461 | * Return 0 on success or else a negative value. | |
1462 | */ | |
1463 | static | |
58eb9381 | 1464 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1465 | { |
1466 | int ret, send_data = 0; | |
1467 | char *data = NULL; | |
1468 | uint32_t len = 0; | |
1469 | ssize_t read_len; | |
1470 | struct lttng_viewer_get_packet get_packet_info; | |
1471 | struct lttng_viewer_trace_packet reply; | |
9a78c92e | 1472 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 JD |
1473 | |
1474 | DBG2("Relay get data packet"); | |
1475 | ||
eea7556c | 1476 | health_code_update(); |
2f8f53af | 1477 | |
9a78c92e MD |
1478 | ret = recv_request(conn->sock, &get_packet_info, |
1479 | sizeof(get_packet_info)); | |
2f8f53af | 1480 | if (ret < 0) { |
d3e2ba59 JD |
1481 | goto end; |
1482 | } | |
eea7556c | 1483 | health_code_update(); |
d3e2ba59 | 1484 | |
0233a6a5 DG |
1485 | /* From this point on, the error label can be reached. */ |
1486 | memset(&reply, 0, sizeof(reply)); | |
1487 | ||
9a78c92e MD |
1488 | vstream = viewer_stream_get_by_id(be64toh(get_packet_info.stream_id)); |
1489 | if (!vstream) { | |
c00978f1 MD |
1490 | DBG("Client requested packet of unknown stream id %" PRIu64, |
1491 | be64toh(get_packet_info.stream_id)); | |
4da923bd MD |
1492 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1493 | goto send_reply_nolock; | |
d3e2ba59 | 1494 | } |
2a174661 | 1495 | |
9a78c92e | 1496 | pthread_mutex_lock(&vstream->stream->lock); |
4a9daf17 | 1497 | |
d3e2ba59 JD |
1498 | len = be32toh(get_packet_info.len); |
1499 | data = zmalloc(len); | |
1500 | if (!data) { | |
1501 | PERROR("relay data zmalloc"); | |
1502 | goto error; | |
1503 | } | |
1504 | ||
9a78c92e MD |
1505 | ret = lseek(vstream->stream_fd->fd, be64toh(get_packet_info.offset), |
1506 | SEEK_SET); | |
d3e2ba59 | 1507 | if (ret < 0) { |
9a78c92e MD |
1508 | PERROR("lseek fd %d to offset %" PRIu64, vstream->stream_fd->fd, |
1509 | be64toh(get_packet_info.offset)); | |
1510 | goto error; | |
d3e2ba59 | 1511 | } |
9a78c92e | 1512 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1513 | if (read_len < len) { |
9a78c92e MD |
1514 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, |
1515 | vstream->stream_fd->fd, | |
1516 | be64toh(get_packet_info.offset)); | |
1517 | goto error; | |
d3e2ba59 | 1518 | } |
c4e361a4 | 1519 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1520 | reply.len = htobe32(len); |
1521 | send_data = 1; | |
1522 | goto send_reply; | |
1523 | ||
1524 | error: | |
c4e361a4 | 1525 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1526 | |
1527 | send_reply: | |
9a78c92e MD |
1528 | if (vstream) { |
1529 | pthread_mutex_unlock(&vstream->stream->lock); | |
1530 | } | |
1531 | send_reply_nolock: | |
d3e2ba59 | 1532 | reply.flags = htobe32(reply.flags); |
eea7556c MD |
1533 | |
1534 | health_code_update(); | |
2f8f53af | 1535 | |
58eb9381 | 1536 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1537 | if (ret < 0) { |
9a78c92e | 1538 | goto end_free; |
d3e2ba59 | 1539 | } |
eea7556c | 1540 | health_code_update(); |
d3e2ba59 JD |
1541 | |
1542 | if (send_data) { | |
eea7556c | 1543 | health_code_update(); |
58eb9381 | 1544 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1545 | if (ret < 0) { |
9a78c92e | 1546 | goto end_free; |
d3e2ba59 | 1547 | } |
eea7556c | 1548 | health_code_update(); |
d3e2ba59 JD |
1549 | } |
1550 | ||
1551 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1552 | be64toh(get_packet_info.stream_id)); | |
1553 | ||
9a78c92e | 1554 | end_free: |
d3e2ba59 | 1555 | free(data); |
d3e2ba59 | 1556 | end: |
9a78c92e MD |
1557 | if (vstream) { |
1558 | viewer_stream_put(vstream); | |
1559 | } | |
d3e2ba59 JD |
1560 | return ret; |
1561 | } | |
1562 | ||
1563 | /* | |
1564 | * Send the session's metadata | |
1565 | * | |
1566 | * Return 0 on success else a negative value. | |
1567 | */ | |
1568 | static | |
58eb9381 | 1569 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1570 | { |
1571 | int ret = 0; | |
1572 | ssize_t read_len; | |
1573 | uint64_t len = 0; | |
1574 | char *data = NULL; | |
1575 | struct lttng_viewer_get_metadata request; | |
1576 | struct lttng_viewer_metadata_packet reply; | |
9a78c92e | 1577 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1578 | |
58eb9381 | 1579 | assert(conn); |
d3e2ba59 JD |
1580 | |
1581 | DBG("Relay get metadata"); | |
1582 | ||
eea7556c | 1583 | health_code_update(); |
2f8f53af | 1584 | |
58eb9381 | 1585 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1586 | if (ret < 0) { |
d3e2ba59 JD |
1587 | goto end; |
1588 | } | |
eea7556c | 1589 | health_code_update(); |
d3e2ba59 | 1590 | |
53efb85a MD |
1591 | memset(&reply, 0, sizeof(reply)); |
1592 | ||
9a78c92e MD |
1593 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1594 | if (!vstream) { | |
3271c155 MD |
1595 | /* |
1596 | * The metadata stream can be closed by a CLOSE command | |
1597 | * just before we attach. It can also be closed by | |
1598 | * per-pid tracing during tracing. Therefore, it is | |
1599 | * possible that we cannot find this viewer stream. | |
1600 | * Reply back to the client with an error if we cannot | |
1601 | * find it. | |
1602 | */ | |
c00978f1 MD |
1603 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
1604 | be64toh(request.stream_id)); | |
3271c155 | 1605 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
9a78c92e | 1606 | goto send_reply; |
d3e2ba59 | 1607 | } |
9a78c92e MD |
1608 | pthread_mutex_lock(&vstream->stream->lock); |
1609 | if (!vstream->stream->is_metadata) { | |
1610 | ERR("Invalid metadata stream"); | |
6763619c JD |
1611 | goto error; |
1612 | } | |
1613 | ||
9a78c92e | 1614 | assert(vstream->metadata_sent <= vstream->stream->metadata_received); |
2a174661 | 1615 | |
9a78c92e | 1616 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
d3e2ba59 | 1617 | if (len == 0) { |
c4e361a4 | 1618 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1619 | goto send_reply; |
1620 | } | |
1621 | ||
1622 | /* first time, we open the metadata file */ | |
9a78c92e | 1623 | if (!vstream->stream_fd) { |
d3e2ba59 JD |
1624 | char fullpath[PATH_MAX]; |
1625 | ||
9a78c92e MD |
1626 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", vstream->path_name, |
1627 | vstream->channel_name); | |
d3e2ba59 JD |
1628 | if (ret < 0) { |
1629 | goto error; | |
1630 | } | |
1631 | ret = open(fullpath, O_RDONLY); | |
1632 | if (ret < 0) { | |
1633 | PERROR("Relay opening metadata file"); | |
1634 | goto error; | |
1635 | } | |
9a78c92e MD |
1636 | vstream->stream_fd = stream_fd_create(ret); |
1637 | if (!vstream->stream_fd) { | |
1638 | if (close(ret)) { | |
1639 | PERROR("close"); | |
1640 | } | |
1641 | goto error; | |
1642 | } | |
d3e2ba59 JD |
1643 | } |
1644 | ||
1645 | reply.len = htobe64(len); | |
1646 | data = zmalloc(len); | |
1647 | if (!data) { | |
1648 | PERROR("viewer metadata zmalloc"); | |
1649 | goto error; | |
1650 | } | |
1651 | ||
9a78c92e | 1652 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1653 | if (read_len < len) { |
d3e2ba59 JD |
1654 | PERROR("Relay reading metadata file"); |
1655 | goto error; | |
1656 | } | |
9a78c92e MD |
1657 | vstream->metadata_sent += read_len; |
1658 | if (vstream->metadata_sent == vstream->stream->metadata_received | |
1659 | && vstream->stream->closed) { | |
1660 | /* Release ownership for the viewer metadata stream. */ | |
1661 | viewer_stream_put(vstream); | |
1662 | } | |
1663 | ||
c4e361a4 | 1664 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
9a78c92e | 1665 | |
d3e2ba59 JD |
1666 | goto send_reply; |
1667 | ||
1668 | error: | |
c4e361a4 | 1669 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1670 | |
1671 | send_reply: | |
eea7556c | 1672 | health_code_update(); |
9a78c92e MD |
1673 | if (vstream) { |
1674 | pthread_mutex_unlock(&vstream->stream->lock); | |
1675 | } | |
58eb9381 | 1676 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1677 | if (ret < 0) { |
9a78c92e | 1678 | goto end_free; |
d3e2ba59 | 1679 | } |
eea7556c | 1680 | health_code_update(); |
d3e2ba59 JD |
1681 | |
1682 | if (len > 0) { | |
58eb9381 | 1683 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1684 | if (ret < 0) { |
9a78c92e | 1685 | goto end_free; |
d3e2ba59 JD |
1686 | } |
1687 | } | |
1688 | ||
1689 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1690 | be64toh(request.stream_id)); | |
1691 | ||
1692 | DBG("Metadata sent"); | |
1693 | ||
9a78c92e | 1694 | end_free: |
d3e2ba59 | 1695 | free(data); |
d3e2ba59 | 1696 | end: |
9a78c92e MD |
1697 | if (vstream) { |
1698 | viewer_stream_put(vstream); | |
1699 | } | |
d3e2ba59 JD |
1700 | return ret; |
1701 | } | |
1702 | ||
c3b7390b JD |
1703 | /* |
1704 | * Create a viewer session. | |
1705 | * | |
1706 | * Return 0 on success or else a negative value. | |
1707 | */ | |
1708 | static | |
1709 | int viewer_create_session(struct relay_connection *conn) | |
1710 | { | |
1711 | int ret; | |
1712 | struct lttng_viewer_create_session_response resp; | |
1713 | ||
1714 | DBG("Viewer create session received"); | |
1715 | ||
53efb85a | 1716 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1717 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
9a78c92e | 1718 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
1719 | if (!conn->viewer_session) { |
1720 | ERR("Allocation viewer session"); | |
1721 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1722 | goto send_reply; | |
1723 | } | |
c3b7390b JD |
1724 | |
1725 | send_reply: | |
1726 | health_code_update(); | |
1727 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1728 | if (ret < 0) { | |
1729 | goto end; | |
1730 | } | |
1731 | health_code_update(); | |
1732 | ret = 0; | |
1733 | ||
1734 | end: | |
1735 | return ret; | |
1736 | } | |
1737 | ||
1738 | ||
d3e2ba59 JD |
1739 | /* |
1740 | * live_relay_unknown_command: send -1 if received unknown command | |
1741 | */ | |
1742 | static | |
58eb9381 | 1743 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1744 | { |
1745 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1746 | |
53efb85a | 1747 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1748 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1749 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1750 | } |
1751 | ||
1752 | /* | |
1753 | * Process the commands received on the control socket | |
1754 | */ | |
1755 | static | |
1756 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1757 | struct relay_connection *conn) |
d3e2ba59 JD |
1758 | { |
1759 | int ret = 0; | |
2f8f53af DG |
1760 | uint32_t msg_value; |
1761 | ||
2f8f53af DG |
1762 | msg_value = be32toh(recv_hdr->cmd); |
1763 | ||
1764 | /* | |
1765 | * Make sure we've done the version check before any command other then a | |
1766 | * new client connection. | |
1767 | */ | |
c4e361a4 | 1768 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1769 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1770 | ret = -1; |
1771 | goto end; | |
1772 | } | |
d3e2ba59 | 1773 | |
2f8f53af | 1774 | switch (msg_value) { |
c4e361a4 | 1775 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1776 | ret = viewer_connect(conn); |
d3e2ba59 | 1777 | break; |
c4e361a4 | 1778 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1779 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1780 | break; |
c4e361a4 | 1781 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1782 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1783 | break; |
c4e361a4 | 1784 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1785 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1786 | break; |
c4e361a4 | 1787 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1788 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1789 | break; |
c4e361a4 | 1790 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1791 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1792 | break; |
c4e361a4 | 1793 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1794 | ret = viewer_get_new_streams(conn); |
80e8027a | 1795 | break; |
c3b7390b JD |
1796 | case LTTNG_VIEWER_CREATE_SESSION: |
1797 | ret = viewer_create_session(conn); | |
1798 | break; | |
d3e2ba59 | 1799 | default: |
9a78c92e MD |
1800 | ERR("Received unknown viewer command (%u)", |
1801 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 1802 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1803 | ret = -1; |
1804 | goto end; | |
1805 | } | |
1806 | ||
1807 | end: | |
1808 | return ret; | |
1809 | } | |
1810 | ||
1811 | static | |
58eb9381 | 1812 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1813 | { |
1814 | int ret; | |
1815 | ||
58eb9381 | 1816 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1817 | |
1818 | ret = close(pollfd); | |
1819 | if (ret < 0) { | |
1820 | ERR("Closing pollfd %d", pollfd); | |
1821 | } | |
1822 | } | |
1823 | ||
d3e2ba59 JD |
1824 | /* |
1825 | * This thread does the actual work | |
1826 | */ | |
1827 | static | |
1828 | void *thread_worker(void *data) | |
1829 | { | |
1830 | int ret, err = -1; | |
1831 | uint32_t nb_fd; | |
d3e2ba59 | 1832 | struct lttng_poll_event events; |
9a78c92e | 1833 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
1834 | struct lttng_ht_iter iter; |
1835 | struct lttng_viewer_cmd recv_hdr; | |
f89048c1 | 1836 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
1837 | |
1838 | DBG("[thread] Live viewer relay worker started"); | |
1839 | ||
1840 | rcu_register_thread(); | |
1841 | ||
eea7556c MD |
1842 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1843 | ||
9b5e0863 MD |
1844 | if (testpoint(relayd_thread_live_worker)) { |
1845 | goto error_testpoint; | |
1846 | } | |
1847 | ||
d3e2ba59 | 1848 | /* table of connections indexed on socket */ |
9a78c92e MD |
1849 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1850 | if (!viewer_connections_ht) { | |
1851 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
1852 | } |
1853 | ||
1854 | ret = create_thread_poll_set(&events, 2); | |
1855 | if (ret < 0) { | |
1856 | goto error_poll_create; | |
1857 | } | |
1858 | ||
58eb9381 | 1859 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1860 | if (ret < 0) { |
1861 | goto error; | |
1862 | } | |
1863 | ||
1864 | restart: | |
1865 | while (1) { | |
1866 | int i; | |
1867 | ||
eea7556c MD |
1868 | health_code_update(); |
1869 | ||
d3e2ba59 JD |
1870 | /* Infinite blocking call, waiting for transmission */ |
1871 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1872 | health_poll_entry(); |
d3e2ba59 | 1873 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1874 | health_poll_exit(); |
d3e2ba59 JD |
1875 | if (ret < 0) { |
1876 | /* | |
1877 | * Restart interrupted system call. | |
1878 | */ | |
1879 | if (errno == EINTR) { | |
1880 | goto restart; | |
1881 | } | |
1882 | goto error; | |
1883 | } | |
1884 | ||
1885 | nb_fd = ret; | |
1886 | ||
1887 | /* | |
1888 | * Process control. The control connection is prioritised so we don't | |
1889 | * starve it with high throughput tracing data on the data | |
1890 | * connection. | |
1891 | */ | |
1892 | for (i = 0; i < nb_fd; i++) { | |
1893 | /* Fetch once the poll data */ | |
1894 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1895 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1896 | ||
eea7556c MD |
1897 | health_code_update(); |
1898 | ||
e0077699 MD |
1899 | if (!revents) { |
1900 | /* No activity for this FD (poll implementation). */ | |
1901 | continue; | |
1902 | } | |
1903 | ||
d3e2ba59 | 1904 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 1905 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
1906 | if (ret) { |
1907 | err = 0; | |
1908 | goto exit; | |
1909 | } | |
1910 | ||
9a78c92e | 1911 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 1912 | if (pollfd == live_conn_pipe[0]) { |
584fc280 | 1913 | 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); | |
584fc280 MD |
1925 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1926 | ERR("Relay live pipe error"); | |
1927 | goto error; | |
1928 | } else { | |
1929 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1930 | goto error; | |
d3e2ba59 | 1931 | } |
58eb9381 | 1932 | } else { |
9a78c92e | 1933 | /* Connection activity. */ |
f89048c1 JG |
1934 | struct relay_connection *conn; |
1935 | ||
9a78c92e MD |
1936 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
1937 | if (!conn) { | |
1938 | continue; | |
1939 | } | |
58eb9381 | 1940 | |
584fc280 | 1941 | if (revents & LPOLLIN) { |
58eb9381 DG |
1942 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
1943 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 1944 | if (ret <= 0) { |
9a78c92e | 1945 | /* Connection closed. */ |
58eb9381 | 1946 | cleanup_connection_pollfd(&events, pollfd); |
9a78c92e MD |
1947 | /* Put "create" ownership reference. */ |
1948 | connection_put(conn); | |
58eb9381 | 1949 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 1950 | } else { |
58eb9381 | 1951 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
1952 | if (ret < 0) { |
1953 | /* Clear the session on error. */ | |
58eb9381 | 1954 | cleanup_connection_pollfd(&events, pollfd); |
9a78c92e MD |
1955 | /* Put "create" ownership reference. */ |
1956 | connection_put(conn); | |
d3e2ba59 JD |
1957 | DBG("Viewer connection closed with %d", pollfd); |
1958 | } | |
1959 | } | |
584fc280 MD |
1960 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1961 | cleanup_connection_pollfd(&events, pollfd); | |
1962 | /* Put "create" ownership reference. */ | |
1963 | connection_put(conn); | |
1964 | } else { | |
1965 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1966 | connection_put(conn); | |
1967 | goto error; | |
d3e2ba59 | 1968 | } |
9a78c92e MD |
1969 | /* Put local "get_by_sock" reference. */ |
1970 | connection_put(conn); | |
d3e2ba59 JD |
1971 | } |
1972 | } | |
1973 | } | |
1974 | ||
1975 | exit: | |
1976 | error: | |
1977 | lttng_poll_clean(&events); | |
1978 | ||
58eb9381 | 1979 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 1980 | rcu_read_lock(); |
9a78c92e | 1981 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
f89048c1 | 1982 | destroy_conn, |
58eb9381 | 1983 | sock_n.node) { |
eea7556c | 1984 | health_code_update(); |
9a78c92e | 1985 | connection_put(destroy_conn); |
d3e2ba59 JD |
1986 | } |
1987 | rcu_read_unlock(); | |
1988 | error_poll_create: | |
9a78c92e MD |
1989 | lttng_ht_destroy(viewer_connections_ht); |
1990 | viewer_connections_ht_error: | |
58eb9381 DG |
1991 | /* Close relay conn pipes */ |
1992 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
1993 | if (err) { |
1994 | DBG("Viewer worker thread exited with error"); | |
1995 | } | |
1996 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 1997 | error_testpoint: |
eea7556c MD |
1998 | if (err) { |
1999 | health_error(); | |
2000 | ERR("Health error occurred in %s", __func__); | |
2001 | } | |
2002 | health_unregister(health_relayd); | |
770f96f4 MD |
2003 | if (lttng_relay_stop_threads()) { |
2004 | ERR("Error stopping threads"); | |
77c54fed | 2005 | } |
d3e2ba59 JD |
2006 | rcu_unregister_thread(); |
2007 | return NULL; | |
2008 | } | |
2009 | ||
2010 | /* | |
2011 | * Create the relay command pipe to wake thread_manage_apps. | |
2012 | * Closed in cleanup(). | |
2013 | */ | |
58eb9381 | 2014 | static int create_conn_pipe(void) |
d3e2ba59 | 2015 | { |
77c54fed MD |
2016 | return utils_create_pipe_cloexec(live_conn_pipe); |
2017 | } | |
d3e2ba59 | 2018 | |
77c54fed | 2019 | int relayd_live_join(void) |
d3e2ba59 | 2020 | { |
77c54fed | 2021 | int ret, retval = 0; |
d3e2ba59 JD |
2022 | void *status; |
2023 | ||
d3e2ba59 | 2024 | ret = pthread_join(live_listener_thread, &status); |
77c54fed MD |
2025 | if (ret) { |
2026 | errno = ret; | |
d3e2ba59 | 2027 | PERROR("pthread_join live listener"); |
77c54fed | 2028 | retval = -1; |
d3e2ba59 JD |
2029 | } |
2030 | ||
2031 | ret = pthread_join(live_worker_thread, &status); | |
77c54fed MD |
2032 | if (ret) { |
2033 | errno = ret; | |
d3e2ba59 | 2034 | PERROR("pthread_join live worker"); |
77c54fed | 2035 | retval = -1; |
d3e2ba59 JD |
2036 | } |
2037 | ||
2038 | ret = pthread_join(live_dispatcher_thread, &status); | |
77c54fed MD |
2039 | if (ret) { |
2040 | errno = ret; | |
d3e2ba59 | 2041 | PERROR("pthread_join live dispatcher"); |
77c54fed | 2042 | retval = -1; |
d3e2ba59 JD |
2043 | } |
2044 | ||
77c54fed | 2045 | cleanup_relayd_live(); |
d3e2ba59 | 2046 | |
77c54fed | 2047 | return retval; |
d3e2ba59 JD |
2048 | } |
2049 | ||
2050 | /* | |
2051 | * main | |
2052 | */ | |
9a78c92e | 2053 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2054 | { |
77c54fed | 2055 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2056 | void *status; |
2057 | int is_root; | |
2058 | ||
77c54fed MD |
2059 | if (!uri) { |
2060 | retval = -1; | |
2061 | goto exit_init_data; | |
2062 | } | |
d3e2ba59 JD |
2063 | live_uri = uri; |
2064 | ||
d3e2ba59 JD |
2065 | /* Check if daemon is UID = 0 */ |
2066 | is_root = !getuid(); | |
2067 | ||
2068 | if (!is_root) { | |
2069 | if (live_uri->port < 1024) { | |
2070 | ERR("Need to be root to use ports < 1024"); | |
77c54fed MD |
2071 | retval = -1; |
2072 | goto exit_init_data; | |
d3e2ba59 JD |
2073 | } |
2074 | } | |
2075 | ||
2076 | /* Setup the thread apps communication pipe. */ | |
77c54fed MD |
2077 | if (create_conn_pipe()) { |
2078 | retval = -1; | |
2079 | goto exit_init_data; | |
d3e2ba59 JD |
2080 | } |
2081 | ||
2082 | /* Init relay command queue. */ | |
8bdee6e2 | 2083 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2084 | |
2085 | /* Set up max poll set size */ | |
2086 | lttng_poll_set_max_size(); | |
2087 | ||
2088 | /* Setup the dispatcher thread */ | |
2089 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2090 | thread_dispatcher, (void *) NULL); | |
77c54fed MD |
2091 | if (ret) { |
2092 | errno = ret; | |
d3e2ba59 | 2093 | PERROR("pthread_create viewer dispatcher"); |
77c54fed MD |
2094 | retval = -1; |
2095 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2096 | } |
2097 | ||
2098 | /* Setup the worker thread */ | |
2099 | ret = pthread_create(&live_worker_thread, NULL, | |
9a78c92e | 2100 | thread_worker, NULL); |
77c54fed MD |
2101 | if (ret) { |
2102 | errno = ret; | |
d3e2ba59 | 2103 | PERROR("pthread_create viewer worker"); |
77c54fed MD |
2104 | retval = -1; |
2105 | goto exit_worker_thread; | |
d3e2ba59 JD |
2106 | } |
2107 | ||
2108 | /* Setup the listener thread */ | |
2109 | ret = pthread_create(&live_listener_thread, NULL, | |
2110 | thread_listener, (void *) NULL); | |
77c54fed MD |
2111 | if (ret) { |
2112 | errno = ret; | |
d3e2ba59 | 2113 | PERROR("pthread_create viewer listener"); |
77c54fed MD |
2114 | retval = -1; |
2115 | goto exit_listener_thread; | |
d3e2ba59 JD |
2116 | } |
2117 | ||
77c54fed MD |
2118 | /* |
2119 | * All OK, started all threads. | |
2120 | */ | |
2121 | return retval; | |
2122 | ||
bafd3fc0 JG |
2123 | /* |
2124 | * Join on the live_listener_thread should anything be added after | |
2125 | * the live_listener thread's creation. | |
2126 | */ | |
d3e2ba59 | 2127 | |
77c54fed | 2128 | exit_listener_thread: |
d3e2ba59 | 2129 | |
d3e2ba59 | 2130 | ret = pthread_join(live_worker_thread, &status); |
77c54fed MD |
2131 | if (ret) { |
2132 | errno = ret; | |
d3e2ba59 | 2133 | PERROR("pthread_join live worker"); |
77c54fed | 2134 | retval = -1; |
d3e2ba59 | 2135 | } |
77c54fed | 2136 | exit_worker_thread: |
d3e2ba59 | 2137 | |
d3e2ba59 | 2138 | ret = pthread_join(live_dispatcher_thread, &status); |
77c54fed MD |
2139 | if (ret) { |
2140 | errno = ret; | |
d3e2ba59 | 2141 | PERROR("pthread_join live dispatcher"); |
77c54fed | 2142 | retval = -1; |
d3e2ba59 | 2143 | } |
77c54fed | 2144 | exit_dispatcher_thread: |
d3e2ba59 | 2145 | |
77c54fed MD |
2146 | exit_init_data: |
2147 | cleanup_relayd_live(); | |
d3e2ba59 | 2148 | |
77c54fed | 2149 | return retval; |
d3e2ba59 | 2150 | } |