Commit | Line | Data |
---|---|---|
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 MD |
308 | /* |
309 | * stream published is protected by the session | |
310 | * lock. | |
311 | */ | |
312 | if (!stream->published) { | |
313 | goto next; | |
314 | } | |
315 | vstream = viewer_stream_get_by_id(stream->stream_handle); | |
2f8f53af | 316 | if (!vstream) { |
9a78c92e | 317 | vstream = viewer_stream_create(stream, seek_t); |
2a174661 DG |
318 | if (!vstream) { |
319 | ret = -1; | |
9a78c92e 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 | } | |
9a78c92e MD |
329 | } else { |
330 | if (!vstream->sent_flag && nb_unsent) { | |
331 | /* Update number of unsent stream counter. */ | |
332 | (*nb_unsent)++; | |
333 | } | |
334 | viewer_stream_put(vstream); | |
2f8f53af | 335 | } |
2a174661 DG |
336 | /* Update number of total stream counter. */ |
337 | if (nb_total) { | |
338 | (*nb_total)++; | |
2f8f53af | 339 | } |
9a78c92e MD |
340 | next: |
341 | stream_put(stream); | |
2f8f53af | 342 | } |
9a78c92e | 343 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
344 | } |
345 | ||
346 | ret = 0; | |
347 | ||
348 | error_unlock: | |
2a174661 | 349 | rcu_read_unlock(); |
9a78c92e | 350 | pthread_mutex_unlock(&session->lock); |
2f8f53af DG |
351 | return ret; |
352 | } | |
353 | ||
770f96f4 | 354 | int relayd_live_stop(void) |
d3e2ba59 | 355 | { |
770f96f4 | 356 | /* Stop dispatch thread */ |
d3e2ba59 | 357 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 358 | futex_nto1_wake(&viewer_conn_queue.futex); |
770f96f4 | 359 | return 0; |
d3e2ba59 JD |
360 | } |
361 | ||
d3e2ba59 JD |
362 | /* |
363 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
364 | */ | |
365 | static | |
366 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
367 | { | |
368 | int ret; | |
369 | ||
370 | if (events == NULL || size == 0) { | |
371 | ret = -1; | |
372 | goto error; | |
373 | } | |
374 | ||
375 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
376 | if (ret < 0) { | |
377 | goto error; | |
378 | } | |
379 | ||
380 | /* Add quit pipe */ | |
bcf4a440 | 381 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
382 | if (ret < 0) { |
383 | goto error; | |
384 | } | |
385 | ||
386 | return 0; | |
387 | ||
388 | error: | |
389 | return ret; | |
390 | } | |
391 | ||
392 | /* | |
393 | * Check if the thread quit pipe was triggered. | |
394 | * | |
395 | * Return 1 if it was triggered else 0; | |
396 | */ | |
397 | static | |
bcf4a440 | 398 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 399 | { |
bcf4a440 | 400 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
401 | return 1; |
402 | } | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Create and init socket from uri. | |
409 | */ | |
410 | static | |
411 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
412 | { | |
413 | int ret; | |
414 | struct lttcomm_sock *sock = NULL; | |
415 | ||
416 | sock = lttcomm_alloc_sock_from_uri(uri); | |
417 | if (sock == NULL) { | |
418 | ERR("Allocating socket"); | |
419 | goto error; | |
420 | } | |
421 | ||
422 | ret = lttcomm_create_sock(sock); | |
423 | if (ret < 0) { | |
424 | goto error; | |
425 | } | |
426 | DBG("Listening on sock %d for live", sock->fd); | |
427 | ||
428 | ret = sock->ops->bind(sock); | |
429 | if (ret < 0) { | |
430 | goto error; | |
431 | } | |
432 | ||
433 | ret = sock->ops->listen(sock, -1); | |
434 | if (ret < 0) { | |
435 | goto error; | |
436 | ||
437 | } | |
438 | ||
439 | return sock; | |
440 | ||
441 | error: | |
442 | if (sock) { | |
443 | lttcomm_destroy_sock(sock); | |
444 | } | |
445 | return NULL; | |
446 | } | |
447 | ||
448 | /* | |
449 | * This thread manages the listening for new connections on the network | |
450 | */ | |
451 | static | |
452 | void *thread_listener(void *data) | |
453 | { | |
454 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
455 | uint32_t revents, nb_fd; |
456 | struct lttng_poll_event events; | |
457 | struct lttcomm_sock *live_control_sock; | |
458 | ||
459 | DBG("[thread] Relay live listener started"); | |
460 | ||
eea7556c MD |
461 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
462 | ||
463 | health_code_update(); | |
464 | ||
d3e2ba59 JD |
465 | live_control_sock = init_socket(live_uri); |
466 | if (!live_control_sock) { | |
467 | goto error_sock_control; | |
468 | } | |
469 | ||
fb4d42ab | 470 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
d3e2ba59 JD |
471 | ret = create_thread_poll_set(&events, 2); |
472 | if (ret < 0) { | |
473 | goto error_create_poll; | |
474 | } | |
475 | ||
476 | /* Add the control socket */ | |
477 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
478 | if (ret < 0) { | |
479 | goto error_poll_add; | |
480 | } | |
481 | ||
3fd27398 MD |
482 | lttng_relay_notify_ready(); |
483 | ||
9b5e0863 MD |
484 | if (testpoint(relayd_thread_live_listener)) { |
485 | goto error_testpoint; | |
486 | } | |
487 | ||
d3e2ba59 | 488 | while (1) { |
eea7556c MD |
489 | health_code_update(); |
490 | ||
d3e2ba59 JD |
491 | DBG("Listener accepting live viewers connections"); |
492 | ||
493 | restart: | |
eea7556c | 494 | health_poll_entry(); |
d3e2ba59 | 495 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 496 | health_poll_exit(); |
d3e2ba59 JD |
497 | if (ret < 0) { |
498 | /* | |
499 | * Restart interrupted system call. | |
500 | */ | |
501 | if (errno == EINTR) { | |
502 | goto restart; | |
503 | } | |
504 | goto error; | |
505 | } | |
506 | nb_fd = ret; | |
507 | ||
508 | DBG("Relay new viewer connection received"); | |
509 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
510 | health_code_update(); |
511 | ||
d3e2ba59 JD |
512 | /* Fetch once the poll data */ |
513 | revents = LTTNG_POLL_GETEV(&events, i); | |
514 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
515 | ||
e0077699 MD |
516 | if (!revents) { |
517 | /* No activity for this FD (poll implementation). */ | |
518 | continue; | |
519 | } | |
520 | ||
d3e2ba59 | 521 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 522 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
523 | if (ret) { |
524 | err = 0; | |
525 | goto exit; | |
526 | } | |
527 | ||
528 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
529 | ERR("socket poll error"); | |
530 | goto error; | |
531 | } else if (revents & LPOLLIN) { | |
532 | /* | |
9a78c92e MD |
533 | * A new connection is requested, therefore a |
534 | * viewer connection is allocated in this | |
535 | * thread, enqueued to a global queue and | |
536 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 537 | */ |
58eb9381 DG |
538 | int val = 1; |
539 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
540 | struct lttcomm_sock *newsock; |
541 | ||
d3e2ba59 JD |
542 | newsock = live_control_sock->ops->accept(live_control_sock); |
543 | if (!newsock) { | |
544 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
545 | goto error; |
546 | } | |
547 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 548 | |
d3e2ba59 | 549 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 550 | sizeof(val)); |
d3e2ba59 JD |
551 | if (ret < 0) { |
552 | PERROR("setsockopt inet"); | |
553 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
554 | goto error; |
555 | } | |
9a78c92e MD |
556 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
557 | if (!new_conn) { | |
558 | lttcomm_destroy_sock(newsock); | |
559 | goto error; | |
560 | } | |
561 | /* Ownership assumed by the connection. */ | |
562 | newsock = NULL; | |
d3e2ba59 | 563 | |
58eb9381 | 564 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
565 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
566 | &new_conn->qnode); | |
d3e2ba59 JD |
567 | |
568 | /* | |
9a78c92e MD |
569 | * Wake the dispatch queue futex. |
570 | * Implicit memory barrier with the | |
571 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 572 | */ |
58eb9381 | 573 | futex_nto1_wake(&viewer_conn_queue.futex); |
d3e2ba59 JD |
574 | } |
575 | } | |
576 | } | |
577 | ||
578 | exit: | |
579 | error: | |
580 | error_poll_add: | |
9b5e0863 | 581 | error_testpoint: |
d3e2ba59 JD |
582 | lttng_poll_clean(&events); |
583 | error_create_poll: | |
584 | if (live_control_sock->fd >= 0) { | |
585 | ret = live_control_sock->ops->close(live_control_sock); | |
586 | if (ret) { | |
587 | PERROR("close"); | |
588 | } | |
589 | } | |
590 | lttcomm_destroy_sock(live_control_sock); | |
591 | error_sock_control: | |
592 | if (err) { | |
eea7556c | 593 | health_error(); |
d3e2ba59 JD |
594 | DBG("Live viewer listener thread exited with error"); |
595 | } | |
eea7556c | 596 | health_unregister(health_relayd); |
d3e2ba59 | 597 | DBG("Live viewer listener thread cleanup complete"); |
770f96f4 MD |
598 | if (lttng_relay_stop_threads()) { |
599 | ERR("Error stopping threads"); | |
77c54fed | 600 | } |
d3e2ba59 JD |
601 | return NULL; |
602 | } | |
603 | ||
604 | /* | |
605 | * This thread manages the dispatching of the requests to worker threads | |
606 | */ | |
607 | static | |
608 | void *thread_dispatcher(void *data) | |
609 | { | |
6cd525e8 MD |
610 | int err = -1; |
611 | ssize_t ret; | |
8bdee6e2 | 612 | struct cds_wfcq_node *node; |
58eb9381 | 613 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
614 | |
615 | DBG("[thread] Live viewer relay dispatcher started"); | |
616 | ||
eea7556c MD |
617 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
618 | ||
9b5e0863 MD |
619 | if (testpoint(relayd_thread_live_dispatcher)) { |
620 | goto error_testpoint; | |
621 | } | |
622 | ||
eea7556c MD |
623 | health_code_update(); |
624 | ||
d3e2ba59 | 625 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
626 | health_code_update(); |
627 | ||
d3e2ba59 | 628 | /* Atomically prepare the queue futex */ |
58eb9381 | 629 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
630 | |
631 | do { | |
eea7556c MD |
632 | health_code_update(); |
633 | ||
d3e2ba59 | 634 | /* Dequeue commands */ |
8bdee6e2 SM |
635 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
636 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
637 | if (node == NULL) { |
638 | DBG("Woken up but nothing in the live-viewer " | |
639 | "relay command queue"); | |
640 | /* Continue thread execution */ | |
641 | break; | |
642 | } | |
58eb9381 | 643 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 644 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 645 | conn->sock->fd); |
d3e2ba59 JD |
646 | |
647 | /* | |
9a78c92e MD |
648 | * Inform worker thread of the new request. This |
649 | * call is blocking so we can be assured that | |
650 | * the data will be read at some point in time | |
651 | * or wait to the end of the world :) | |
d3e2ba59 | 652 | */ |
58eb9381 DG |
653 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
654 | if (ret < 0) { | |
655 | PERROR("write conn pipe"); | |
9a78c92e | 656 | connection_put(conn); |
d3e2ba59 JD |
657 | goto error; |
658 | } | |
659 | } while (node != NULL); | |
660 | ||
661 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 662 | health_poll_entry(); |
58eb9381 | 663 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 664 | health_poll_exit(); |
d3e2ba59 JD |
665 | } |
666 | ||
eea7556c MD |
667 | /* Normal exit, no error */ |
668 | err = 0; | |
669 | ||
d3e2ba59 | 670 | error: |
9b5e0863 | 671 | error_testpoint: |
eea7556c MD |
672 | if (err) { |
673 | health_error(); | |
674 | ERR("Health error occurred in %s", __func__); | |
675 | } | |
676 | health_unregister(health_relayd); | |
d3e2ba59 | 677 | DBG("Live viewer dispatch thread dying"); |
770f96f4 MD |
678 | if (lttng_relay_stop_threads()) { |
679 | ERR("Error stopping threads"); | |
77c54fed | 680 | } |
d3e2ba59 JD |
681 | return NULL; |
682 | } | |
683 | ||
684 | /* | |
685 | * Establish connection with the viewer and check the versions. | |
686 | * | |
687 | * Return 0 on success or else negative value. | |
688 | */ | |
689 | static | |
58eb9381 | 690 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
691 | { |
692 | int ret; | |
693 | struct lttng_viewer_connect reply, msg; | |
694 | ||
58eb9381 | 695 | conn->version_check_done = 1; |
d3e2ba59 | 696 | |
eea7556c MD |
697 | health_code_update(); |
698 | ||
2f8f53af DG |
699 | DBG("Viewer is establishing a connection to the relayd."); |
700 | ||
58eb9381 | 701 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 702 | if (ret < 0) { |
d3e2ba59 JD |
703 | goto end; |
704 | } | |
705 | ||
eea7556c MD |
706 | health_code_update(); |
707 | ||
f46b2ce6 | 708 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
709 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
710 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
711 | ||
712 | /* Major versions must be the same */ | |
713 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
714 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
715 | reply.major, be32toh(msg.major)); | |
72180669 | 716 | ret = -1; |
d3e2ba59 JD |
717 | goto end; |
718 | } | |
719 | ||
58eb9381 | 720 | conn->major = reply.major; |
d3e2ba59 JD |
721 | /* We adapt to the lowest compatible version */ |
722 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 723 | conn->minor = reply.minor; |
d3e2ba59 | 724 | } else { |
58eb9381 | 725 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
726 | } |
727 | ||
c4e361a4 | 728 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 729 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 730 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 731 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
732 | } else { |
733 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
734 | ret = -1; | |
735 | goto end; | |
736 | } | |
737 | ||
738 | reply.major = htobe32(reply.major); | |
739 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 740 | if (conn->type == RELAY_VIEWER_COMMAND) { |
19eba299 | 741 | /* |
9a78c92e MD |
742 | * Increment outside of htobe64 macro, because the argument can |
743 | * be used more than once within the macro, and thus the | |
744 | * operation may be undefined. | |
19eba299 | 745 | */ |
9a78c92e | 746 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
19eba299 | 747 | last_relay_viewer_session_id++; |
9a78c92e | 748 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
19eba299 | 749 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 750 | } |
eea7556c MD |
751 | |
752 | health_code_update(); | |
753 | ||
58eb9381 | 754 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 755 | if (ret < 0) { |
2f8f53af | 756 | goto end; |
d3e2ba59 JD |
757 | } |
758 | ||
eea7556c MD |
759 | health_code_update(); |
760 | ||
58eb9381 | 761 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
762 | ret = 0; |
763 | ||
764 | end: | |
765 | return ret; | |
766 | } | |
767 | ||
768 | /* | |
769 | * Send the viewer the list of current sessions. | |
9a78c92e MD |
770 | * We need to create a copy of the hash table content because otherwise |
771 | * we cannot assume the number of entries stays the same between getting | |
772 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
773 | * |
774 | * Return 0 on success or else a negative value. | |
775 | */ | |
776 | static | |
58eb9381 | 777 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
778 | { |
779 | int ret; | |
780 | struct lttng_viewer_list_sessions session_list; | |
d3e2ba59 | 781 | struct lttng_ht_iter iter; |
d3e2ba59 | 782 | struct relay_session *session; |
9a78c92e MD |
783 | struct lttng_viewer_session *send_session_buf = NULL; |
784 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
785 | uint32_t count = 0; | |
d3e2ba59 JD |
786 | |
787 | DBG("List sessions received"); | |
788 | ||
9a78c92e MD |
789 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
790 | if (!send_session_buf) { | |
791 | return -1; | |
d3e2ba59 JD |
792 | } |
793 | ||
9a78c92e MD |
794 | rcu_read_lock(); |
795 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 796 | session_n.node) { |
9a78c92e | 797 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 798 | |
eea7556c MD |
799 | health_code_update(); |
800 | ||
9a78c92e MD |
801 | if (count >= buf_count) { |
802 | struct lttng_viewer_session *newbuf; | |
803 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 804 | |
9a78c92e MD |
805 | newbuf = realloc(send_session_buf, |
806 | new_buf_count * sizeof(*send_session_buf)); | |
807 | if (!newbuf) { | |
808 | ret = -1; | |
809 | rcu_read_unlock(); | |
810 | goto end_free; | |
811 | } | |
812 | send_session_buf = newbuf; | |
813 | buf_count = new_buf_count; | |
6763619c | 814 | } |
9a78c92e MD |
815 | send_session = &send_session_buf[count]; |
816 | strncpy(send_session->session_name, session->session_name, | |
817 | sizeof(send_session->session_name)); | |
818 | strncpy(send_session->hostname, session->hostname, | |
819 | sizeof(send_session->hostname)); | |
820 | send_session->id = htobe64(session->id); | |
821 | send_session->live_timer = htobe32(session->live_timer); | |
822 | if (session->viewer_attached) { | |
823 | send_session->clients = htobe32(1); | |
824 | } else { | |
825 | send_session->clients = htobe32(0); | |
d227d5bd | 826 | } |
9a78c92e MD |
827 | send_session->streams = htobe32(session->stream_count); |
828 | count++; | |
829 | } | |
830 | rcu_read_unlock(); | |
d227d5bd | 831 | |
9a78c92e | 832 | session_list.sessions_count = htobe32(count); |
d227d5bd | 833 | |
9a78c92e | 834 | health_code_update(); |
d227d5bd | 835 | |
9a78c92e MD |
836 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
837 | if (ret < 0) { | |
838 | goto end_free; | |
d227d5bd | 839 | } |
d227d5bd | 840 | |
9a78c92e | 841 | health_code_update(); |
d227d5bd | 842 | |
9a78c92e MD |
843 | ret = send_response(conn->sock, send_session_buf, |
844 | count * sizeof(*send_session_buf)); | |
845 | if (ret < 0) { | |
846 | goto end_free; | |
d227d5bd | 847 | } |
9a78c92e | 848 | health_code_update(); |
d227d5bd | 849 | |
9a78c92e MD |
850 | ret = 0; |
851 | end_free: | |
852 | free(send_session_buf); | |
853 | return ret; | |
d227d5bd JD |
854 | } |
855 | ||
80e8027a | 856 | /* |
9a78c92e | 857 | * Send the viewer the list of current streams. |
80e8027a JD |
858 | */ |
859 | static | |
58eb9381 | 860 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
861 | { |
862 | int ret, send_streams = 0; | |
9a78c92e | 863 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
864 | struct lttng_viewer_new_streams_request request; |
865 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 866 | struct relay_session *session; |
6763619c | 867 | uint64_t session_id; |
11436961 | 868 | bool closed = false; |
80e8027a | 869 | |
58eb9381 | 870 | assert(conn); |
80e8027a JD |
871 | |
872 | DBG("Get new streams received"); | |
873 | ||
80e8027a JD |
874 | health_code_update(); |
875 | ||
2f8f53af | 876 | /* Receive the request from the connected client. */ |
58eb9381 | 877 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 878 | if (ret < 0) { |
80e8027a JD |
879 | goto error; |
880 | } | |
6763619c | 881 | session_id = be64toh(request.session_id); |
80e8027a JD |
882 | |
883 | health_code_update(); | |
884 | ||
53efb85a MD |
885 | memset(&response, 0, sizeof(response)); |
886 | ||
9a78c92e | 887 | session = session_get_by_id(session_id); |
2f8f53af | 888 | if (!session) { |
6763619c | 889 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 890 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
891 | goto send_reply; |
892 | } | |
893 | ||
9a78c92e | 894 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
80e8027a | 895 | send_streams = 0; |
c4e361a4 | 896 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
897 | goto send_reply; |
898 | } | |
899 | ||
6763619c JD |
900 | send_streams = 1; |
901 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
902 | ||
9a78c92e | 903 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
11436961 | 904 | &nb_created, &closed); |
2f8f53af | 905 | if (ret < 0) { |
9a78c92e | 906 | goto end_put_session; |
2f8f53af DG |
907 | } |
908 | /* Only send back the newly created streams with the unsent ones. */ | |
909 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
910 | response.streams_count = htobe32(nb_streams); |
911 | ||
4479f682 | 912 | /* |
11436961 | 913 | * If the session is closed, HUP when there are no more streams. |
4479f682 | 914 | */ |
11436961 | 915 | if (closed && nb_total == 0) { |
4479f682 | 916 | send_streams = 0; |
11436961 | 917 | response.streams_count = 0; |
4479f682 JD |
918 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
919 | goto send_reply; | |
920 | } | |
921 | ||
80e8027a JD |
922 | send_reply: |
923 | health_code_update(); | |
58eb9381 | 924 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 925 | if (ret < 0) { |
9a78c92e | 926 | goto end_put_session; |
80e8027a JD |
927 | } |
928 | health_code_update(); | |
929 | ||
930 | /* | |
9a78c92e MD |
931 | * Unknown or empty session, just return gracefully, the viewer |
932 | * knows what is happening. | |
80e8027a JD |
933 | */ |
934 | if (!send_streams || !nb_streams) { | |
935 | ret = 0; | |
9a78c92e | 936 | goto end_put_session; |
80e8027a JD |
937 | } |
938 | ||
2f8f53af | 939 | /* |
9a78c92e MD |
940 | * Send stream and *DON'T* ignore the sent flag so every viewer |
941 | * streams that were not sent from that point will be sent to | |
942 | * the viewer. | |
2f8f53af | 943 | */ |
58eb9381 | 944 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af | 945 | if (ret < 0) { |
9a78c92e | 946 | goto end_put_session; |
80e8027a JD |
947 | } |
948 | ||
9a78c92e MD |
949 | end_put_session: |
950 | if (session) { | |
951 | session_put(session); | |
952 | } | |
80e8027a JD |
953 | error: |
954 | return ret; | |
955 | } | |
956 | ||
d3e2ba59 JD |
957 | /* |
958 | * Send the viewer the list of current sessions. | |
959 | */ | |
960 | static | |
58eb9381 | 961 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 962 | { |
2f8f53af DG |
963 | int send_streams = 0; |
964 | ssize_t ret; | |
80e8027a | 965 | uint32_t nb_streams = 0; |
2f8f53af | 966 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
967 | struct lttng_viewer_attach_session_request request; |
968 | struct lttng_viewer_attach_session_response response; | |
9a78c92e | 969 | struct relay_session *session = NULL; |
11436961 | 970 | bool closed = false; |
d3e2ba59 | 971 | |
58eb9381 | 972 | assert(conn); |
d3e2ba59 | 973 | |
eea7556c MD |
974 | health_code_update(); |
975 | ||
2f8f53af | 976 | /* Receive the request from the connected client. */ |
58eb9381 | 977 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 978 | if (ret < 0) { |
d3e2ba59 JD |
979 | goto error; |
980 | } | |
981 | ||
eea7556c MD |
982 | health_code_update(); |
983 | ||
53efb85a MD |
984 | memset(&response, 0, sizeof(response)); |
985 | ||
c3b7390b JD |
986 | if (!conn->viewer_session) { |
987 | DBG("Client trying to attach before creating a live viewer session"); | |
988 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
989 | goto send_reply; | |
990 | } | |
991 | ||
9a78c92e | 992 | session = session_get_by_id(be64toh(request.session_id)); |
2f8f53af | 993 | if (!session) { |
d3e2ba59 JD |
994 | DBG("Relay session %" PRIu64 " not found", |
995 | be64toh(request.session_id)); | |
c4e361a4 | 996 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
997 | goto send_reply; |
998 | } | |
9a78c92e MD |
999 | DBG("Attach session ID %" PRIu64 " received", |
1000 | be64toh(request.session_id)); | |
d3e2ba59 | 1001 | |
9a78c92e | 1002 | if (session->live_timer == 0) { |
d3e2ba59 | 1003 | DBG("Not live session"); |
c4e361a4 | 1004 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1005 | goto send_reply; |
9a78c92e MD |
1006 | } |
1007 | ||
1008 | send_streams = 1; | |
1009 | ret = viewer_session_attach(conn->viewer_session, session); | |
1010 | if (ret) { | |
1011 | DBG("Already a viewer attached"); | |
1012 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); | |
1013 | goto send_reply; | |
d3e2ba59 JD |
1014 | } |
1015 | ||
1016 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1017 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1018 | case LTTNG_VIEWER_SEEK_LAST: | |
9a78c92e | 1019 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1020 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1021 | break; |
1022 | default: | |
1023 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1024 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1025 | send_streams = 0; |
1026 | goto send_reply; | |
1027 | } | |
1028 | ||
11436961 MD |
1029 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, |
1030 | NULL, &closed); | |
2f8f53af | 1031 | if (ret < 0) { |
9a78c92e | 1032 | goto end_put_session; |
d3e2ba59 | 1033 | } |
2f8f53af | 1034 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 | 1035 | |
11436961 MD |
1036 | /* |
1037 | * If the session is closed when the viewer is attaching, it | |
1038 | * means some of the streams may have been concurrently removed, | |
1039 | * so we don't allow the viewer to attach, even if there are | |
1040 | * streams available. | |
1041 | */ | |
1042 | if (closed) { | |
1043 | send_streams = 0; | |
1044 | response.streams_count = 0; | |
1045 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
1046 | goto send_reply; | |
1047 | } | |
1048 | ||
d3e2ba59 | 1049 | send_reply: |
eea7556c | 1050 | health_code_update(); |
58eb9381 | 1051 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1052 | if (ret < 0) { |
9a78c92e | 1053 | goto end_put_session; |
d3e2ba59 | 1054 | } |
eea7556c | 1055 | health_code_update(); |
d3e2ba59 JD |
1056 | |
1057 | /* | |
9a78c92e MD |
1058 | * Unknown or empty session, just return gracefully, the viewer |
1059 | * knows what is happening. | |
d3e2ba59 | 1060 | */ |
157df586 | 1061 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1062 | ret = 0; |
9a78c92e | 1063 | goto end_put_session; |
d3e2ba59 JD |
1064 | } |
1065 | ||
2f8f53af | 1066 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1067 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af | 1068 | if (ret < 0) { |
9a78c92e | 1069 | goto end_put_session; |
d3e2ba59 | 1070 | } |
d3e2ba59 | 1071 | |
9a78c92e MD |
1072 | end_put_session: |
1073 | if (session) { | |
1074 | session_put(session); | |
1075 | } | |
4a9daf17 JD |
1076 | error: |
1077 | return ret; | |
1078 | } | |
1079 | ||
878c34cf DG |
1080 | /* |
1081 | * Open the index file if needed for the given vstream. | |
1082 | * | |
9a78c92e MD |
1083 | * If an index file is successfully opened, the vstream index_fd set with |
1084 | * it. | |
878c34cf DG |
1085 | * |
1086 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
9a78c92e MD |
1087 | * |
1088 | * Called with rstream lock held. | |
878c34cf DG |
1089 | */ |
1090 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1091 | struct relay_stream *rstream) | |
1092 | { | |
1093 | int ret = 0; | |
1094 | ||
9a78c92e | 1095 | if (vstream->index_fd) { |
878c34cf DG |
1096 | goto end; |
1097 | } | |
1098 | ||
1099 | /* | |
9a78c92e | 1100 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1101 | */ |
9a78c92e | 1102 | if (rstream->total_index_received == 0) { |
878c34cf DG |
1103 | ret = -ENOENT; |
1104 | goto end; | |
1105 | } | |
1106 | ret = index_open(vstream->path_name, vstream->channel_name, | |
9a78c92e MD |
1107 | vstream->stream->tracefile_count, |
1108 | vstream->current_tracefile_id); | |
878c34cf | 1109 | if (ret >= 0) { |
9a78c92e MD |
1110 | vstream->index_fd = stream_fd_create(ret); |
1111 | if (!vstream->index_fd) { | |
1112 | if (close(ret)) { | |
1113 | PERROR("close"); | |
1114 | } | |
1115 | ret = -1; | |
1116 | } else { | |
1117 | ret = 0; | |
1118 | } | |
878c34cf DG |
1119 | goto end; |
1120 | } | |
1121 | ||
1122 | end: | |
1123 | return ret; | |
1124 | } | |
1125 | ||
1126 | /* | |
9a78c92e MD |
1127 | * Check the status of the index for the given stream. This function |
1128 | * updates the index structure if needed and can put (close) the vstream | |
1129 | * in the HUP situation. | |
1130 | * | |
1131 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1132 | * that the index has been updated and is ready to be sent to the | |
1133 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1134 | * |
9a78c92e | 1135 | * Called with rstream lock held. |
878c34cf DG |
1136 | */ |
1137 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1138 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1139 | struct lttng_viewer_index *index) | |
1140 | { | |
1141 | int ret; | |
1142 | ||
9a78c92e MD |
1143 | if (trace->session->connection_closed |
1144 | && rstream->total_index_received | |
1145 | == vstream->last_sent_index) { | |
1146 | /* Last index sent and session connection is closed. */ | |
1147 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1148 | goto hup; | |
1149 | } else if (rstream->beacon_ts_end != -1ULL && | |
1150 | rstream->total_index_received | |
1151 | == vstream->last_sent_index) { | |
1152 | /* | |
1153 | * We've received a synchronization beacon and the last index | |
1154 | * available has been sent, the index for now is inactive. | |
1155 | * | |
1156 | * In this case, we have received a beacon which allows us to | |
1157 | * inform the client of a time interval during which we can | |
1158 | * guarantee that there are no events to read (and never will | |
1159 | * be). | |
1160 | */ | |
1161 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1162 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1163 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
1164 | goto index_ready; | |
1165 | } else if (rstream->total_index_received <= vstream->last_sent_index) { | |
1166 | /* | |
1167 | * This actually checks the case where recv == last_sent. | |
1168 | * In this case, we have not received a beacon. Therefore, we | |
1169 | * can only ask the client to retry later. | |
1170 | */ | |
1171 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1172 | goto index_ready; | |
1173 | } else if (!viewer_stream_is_tracefile_seq_readable(vstream, | |
1174 | vstream->current_tracefile_seq)) { | |
1175 | /* | |
1176 | * The producer has overwritten our current file. We | |
1177 | * need to rotate. | |
1178 | */ | |
1179 | DBG("Viewer stream %" PRIu64 " rotation due to overwrite", | |
1180 | vstream->stream->stream_handle); | |
1181 | ret = viewer_stream_rotate(vstream); | |
1182 | if (ret < 0) { | |
1183 | goto end; | |
1184 | } else if (ret == 1) { | |
1185 | /* EOF across entire stream. */ | |
1186 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1187 | goto hup; | |
1188 | } | |
1189 | assert(viewer_stream_is_tracefile_seq_readable(vstream, | |
1190 | vstream->current_tracefile_seq)); | |
1191 | /* ret == 0 means successful so we continue. */ | |
1192 | ret = 0; | |
1193 | } else { | |
1194 | ssize_t read_ret; | |
1195 | char tmp[1]; | |
1196 | ||
1197 | /* | |
1198 | * Use EOF on current index file to find out when we | |
1199 | * need to rotate. | |
1200 | */ | |
1201 | read_ret = lttng_read(vstream->index_fd->fd, tmp, 1); | |
1202 | if (read_ret == 1) { | |
1203 | off_t seek_ret; | |
1204 | ||
1205 | /* There is still data to read. Rewind position. */ | |
1206 | seek_ret = lseek(vstream->index_fd->fd, -1, SEEK_CUR); | |
1207 | if (seek_ret < 0) { | |
1208 | ret = -1; | |
1209 | goto end; | |
1210 | } | |
1211 | ret = 0; | |
1212 | } else if (read_ret == 0) { | |
1213 | /* EOF. We need to rotate. */ | |
1214 | DBG("Viewer stream %" PRIu64 " rotation due to EOF", | |
1215 | vstream->stream->stream_handle); | |
1216 | ret = viewer_stream_rotate(vstream); | |
878c34cf | 1217 | if (ret < 0) { |
9a78c92e | 1218 | goto end; |
878c34cf | 1219 | } else if (ret == 1) { |
9a78c92e | 1220 | /* EOF across entire stream. */ |
878c34cf DG |
1221 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
1222 | goto hup; | |
1223 | } | |
9a78c92e MD |
1224 | assert(viewer_stream_is_tracefile_seq_readable(vstream, |
1225 | vstream->current_tracefile_seq)); | |
878c34cf | 1226 | /* ret == 0 means successful so we continue. */ |
9a78c92e MD |
1227 | ret = 0; |
1228 | } else { | |
1229 | /* Error reading index. */ | |
1230 | ret = -1; | |
878c34cf | 1231 | } |
878c34cf | 1232 | } |
9a78c92e | 1233 | end: |
878c34cf DG |
1234 | return ret; |
1235 | ||
1236 | hup: | |
9a78c92e | 1237 | viewer_stream_put(vstream); |
878c34cf DG |
1238 | index_ready: |
1239 | return 1; | |
1240 | } | |
1241 | ||
d3e2ba59 JD |
1242 | /* |
1243 | * Send the next index for a stream. | |
1244 | * | |
1245 | * Return 0 on success or else a negative value. | |
1246 | */ | |
1247 | static | |
58eb9381 | 1248 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1249 | { |
1250 | int ret; | |
878c34cf | 1251 | ssize_t read_ret; |
d3e2ba59 JD |
1252 | struct lttng_viewer_get_next_index request_index; |
1253 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1254 | struct ctf_packet_index packet_index; |
9a78c92e MD |
1255 | struct relay_viewer_stream *vstream = NULL; |
1256 | struct relay_stream *rstream = NULL; | |
1257 | struct ctf_trace *ctf_trace = NULL; | |
1258 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1259 | |
58eb9381 | 1260 | assert(conn); |
d3e2ba59 JD |
1261 | |
1262 | DBG("Viewer get next index"); | |
1263 | ||
9a78c92e | 1264 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1265 | health_code_update(); |
2f8f53af | 1266 | |
58eb9381 | 1267 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1268 | if (ret < 0) { |
d3e2ba59 JD |
1269 | goto end; |
1270 | } | |
eea7556c | 1271 | health_code_update(); |
d3e2ba59 | 1272 | |
9a78c92e | 1273 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1274 | if (!vstream) { |
2a174661 | 1275 | ret = -1; |
9a78c92e | 1276 | goto end; |
2a174661 DG |
1277 | } |
1278 | ||
9a78c92e MD |
1279 | /* Use back. ref. Protected by refcounts. */ |
1280 | rstream = vstream->stream; | |
1281 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1282 | |
9a78c92e MD |
1283 | /* metadata_viewer_stream may be NULL. */ |
1284 | metadata_viewer_stream = | |
1285 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1286 | |
9a78c92e | 1287 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1288 | |
1289 | /* | |
1290 | * The viewer should not ask for index on metadata stream. | |
1291 | */ | |
9a78c92e | 1292 | if (rstream->is_metadata) { |
c4e361a4 | 1293 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1294 | goto send_reply; |
1295 | } | |
1296 | ||
878c34cf DG |
1297 | /* Try to open an index if one is needed for that stream. */ |
1298 | ret = try_open_index(vstream, rstream); | |
1299 | if (ret < 0) { | |
0e6830aa | 1300 | if (ret == -ENOENT) { |
d3e2ba59 | 1301 | /* |
9a78c92e MD |
1302 | * The index is created only when the first data |
1303 | * packet arrives, it might not be ready at the | |
1304 | * beginning of the session | |
d3e2ba59 | 1305 | */ |
c4e361a4 | 1306 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1307 | } else { |
1308 | /* Unhandled error. */ | |
c4e361a4 | 1309 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1310 | } |
878c34cf | 1311 | goto send_reply; |
d3e2ba59 JD |
1312 | } |
1313 | ||
878c34cf | 1314 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1315 | if (ret < 0) { |
9a78c92e | 1316 | goto error_put; |
878c34cf DG |
1317 | } else if (ret == 1) { |
1318 | /* | |
9a78c92e MD |
1319 | * We have no index to send and check_index_status has populated |
1320 | * viewer_index's status. | |
878c34cf | 1321 | */ |
d3e2ba59 JD |
1322 | goto send_reply; |
1323 | } | |
9a78c92e | 1324 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1325 | assert(!ret); |
d3e2ba59 | 1326 | |
9a78c92e MD |
1327 | /* |
1328 | * vstream->stream_fd may be NULL if it has been closed by | |
1329 | * tracefile rotation, or if we are at the beginning of the | |
1330 | * stream. We open the data stream file here to protect against | |
1331 | * overwrite caused by tracefile rotation (in association with | |
1332 | * unlink performed before overwrite). | |
1333 | */ | |
1334 | if (!vstream->stream_fd) { | |
1335 | char fullpath[PATH_MAX]; | |
1336 | ||
1337 | if (vstream->stream->tracefile_count > 0) { | |
1338 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, | |
1339 | vstream->path_name, | |
1340 | vstream->channel_name, | |
1341 | vstream->current_tracefile_id); | |
1342 | } else { | |
1343 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", | |
1344 | vstream->path_name, | |
1345 | vstream->channel_name); | |
1346 | } | |
1347 | if (ret < 0) { | |
1348 | goto error_put; | |
1349 | } | |
1350 | ret = open(fullpath, O_RDONLY); | |
1351 | if (ret < 0) { | |
1352 | PERROR("Relay opening trace file"); | |
1353 | goto error_put; | |
1354 | } | |
1355 | vstream->stream_fd = stream_fd_create(ret); | |
1356 | if (!vstream->stream_fd) { | |
1357 | if (close(ret)) { | |
1358 | PERROR("close"); | |
1359 | } | |
1360 | goto error_put; | |
1361 | } | |
d3e2ba59 JD |
1362 | } |
1363 | ||
f04a971b | 1364 | ret = check_new_streams(conn); |
4a9daf17 | 1365 | if (ret < 0) { |
9a78c92e MD |
1366 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1367 | goto send_reply; | |
4a9daf17 JD |
1368 | } else if (ret == 1) { |
1369 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1370 | } | |
1371 | ||
9a78c92e | 1372 | read_ret = lttng_read(vstream->index_fd->fd, &packet_index, |
6cd525e8 | 1373 | sizeof(packet_index)); |
9a78c92e MD |
1374 | if (read_ret < sizeof(packet_index)) { |
1375 | ERR("Relay reading index file %d returned %zd", | |
1376 | vstream->index_fd->fd, read_ret); | |
1377 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
6b6b9a5a | 1378 | goto send_reply; |
d3e2ba59 | 1379 | } else { |
c4e361a4 | 1380 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
d3e2ba59 JD |
1381 | vstream->last_sent_index++; |
1382 | } | |
1383 | ||
1384 | /* | |
1385 | * Indexes are stored in big endian, no need to switch before sending. | |
1386 | */ | |
9a78c92e MD |
1387 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1388 | rstream->stream_handle, | |
1389 | be64toh(packet_index.offset)); | |
d3e2ba59 JD |
1390 | viewer_index.offset = packet_index.offset; |
1391 | viewer_index.packet_size = packet_index.packet_size; | |
1392 | viewer_index.content_size = packet_index.content_size; | |
1393 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1394 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1395 | viewer_index.events_discarded = packet_index.events_discarded; | |
1396 | viewer_index.stream_id = packet_index.stream_id; | |
1397 | ||
1398 | send_reply: | |
9a78c92e MD |
1399 | pthread_mutex_unlock(&rstream->lock); |
1400 | ||
1401 | if (metadata_viewer_stream) { | |
1402 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1403 | DBG("get next index metadata check: recv %" PRIu64 | |
1404 | " sent %" PRIu64, | |
1405 | metadata_viewer_stream->stream->metadata_received, | |
1406 | metadata_viewer_stream->metadata_sent); | |
1407 | if (!metadata_viewer_stream->stream->metadata_received || | |
1408 | metadata_viewer_stream->stream->metadata_received > | |
1409 | metadata_viewer_stream->metadata_sent) { | |
1410 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1411 | } | |
1412 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1413 | } | |
1414 | ||
d3e2ba59 | 1415 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1416 | health_code_update(); |
2f8f53af | 1417 | |
58eb9381 | 1418 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1419 | if (ret < 0) { |
9a78c92e | 1420 | goto end; |
d3e2ba59 | 1421 | } |
eea7556c | 1422 | health_code_update(); |
d3e2ba59 | 1423 | |
2f8f53af | 1424 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", |
9a78c92e MD |
1425 | vstream->last_sent_index, |
1426 | vstream->stream->stream_handle); | |
d3e2ba59 | 1427 | end: |
9a78c92e MD |
1428 | if (metadata_viewer_stream) { |
1429 | viewer_stream_put(metadata_viewer_stream); | |
1430 | } | |
1431 | if (vstream) { | |
1432 | viewer_stream_put(vstream); | |
1433 | } | |
1434 | return ret; | |
1435 | ||
1436 | error_put: | |
1437 | pthread_mutex_unlock(&rstream->lock); | |
1438 | if (metadata_viewer_stream) { | |
1439 | viewer_stream_put(metadata_viewer_stream); | |
1440 | } | |
1441 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1442 | return ret; |
1443 | } | |
1444 | ||
1445 | /* | |
1446 | * Send the next index for a stream | |
1447 | * | |
1448 | * Return 0 on success or else a negative value. | |
1449 | */ | |
1450 | static | |
58eb9381 | 1451 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1452 | { |
1453 | int ret, send_data = 0; | |
1454 | char *data = NULL; | |
1455 | uint32_t len = 0; | |
1456 | ssize_t read_len; | |
1457 | struct lttng_viewer_get_packet get_packet_info; | |
1458 | struct lttng_viewer_trace_packet reply; | |
9a78c92e | 1459 | struct relay_viewer_stream *vstream = NULL; |
2a174661 | 1460 | struct ctf_trace *ctf_trace; |
9a78c92e | 1461 | struct relay_viewer_stream *metadata_viewer_stream = NULL; |
d3e2ba59 JD |
1462 | |
1463 | DBG2("Relay get data packet"); | |
1464 | ||
eea7556c | 1465 | health_code_update(); |
2f8f53af | 1466 | |
9a78c92e MD |
1467 | ret = recv_request(conn->sock, &get_packet_info, |
1468 | sizeof(get_packet_info)); | |
2f8f53af | 1469 | if (ret < 0) { |
d3e2ba59 JD |
1470 | goto end; |
1471 | } | |
eea7556c | 1472 | health_code_update(); |
d3e2ba59 | 1473 | |
0233a6a5 DG |
1474 | /* From this point on, the error label can be reached. */ |
1475 | memset(&reply, 0, sizeof(reply)); | |
1476 | ||
9a78c92e MD |
1477 | vstream = viewer_stream_get_by_id(be64toh(get_packet_info.stream_id)); |
1478 | if (!vstream) { | |
d3e2ba59 JD |
1479 | goto error; |
1480 | } | |
2a174661 | 1481 | |
9a78c92e | 1482 | ctf_trace = vstream->stream->trace; |
6763619c | 1483 | |
9a78c92e MD |
1484 | /* metadata_viewer_stream may be NULL. */ |
1485 | metadata_viewer_stream = | |
1486 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
d3e2ba59 | 1487 | |
9a78c92e MD |
1488 | if (metadata_viewer_stream) { |
1489 | bool get_packet_err = false; | |
d3e2ba59 | 1490 | |
9a78c92e MD |
1491 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); |
1492 | DBG("get packet metadata check: recv %" PRIu64 " sent %" PRIu64, | |
1493 | metadata_viewer_stream->stream->metadata_received, | |
1494 | metadata_viewer_stream->metadata_sent); | |
1495 | if (!metadata_viewer_stream->stream->metadata_received || | |
1496 | metadata_viewer_stream->stream->metadata_received > | |
1497 | metadata_viewer_stream->metadata_sent) { | |
1498 | /* | |
1499 | * We prevent the client from reading a data stream as | |
1500 | * long as there is metadata left to consume. This | |
1501 | * ensures that the client won't receive data of which | |
1502 | * it can't make sense. | |
1503 | */ | |
1504 | get_packet_err = true; | |
d3e2ba59 | 1505 | } |
9a78c92e MD |
1506 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); |
1507 | viewer_stream_put(metadata_viewer_stream); | |
1508 | if (get_packet_err) { | |
1509 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); | |
1510 | reply.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1511 | goto send_reply_nolock; | |
d3e2ba59 | 1512 | } |
d3e2ba59 JD |
1513 | } |
1514 | ||
9a78c92e MD |
1515 | pthread_mutex_lock(&vstream->stream->lock); |
1516 | /* | |
1517 | * The vstream->stream_fd used here has been opened by | |
1518 | * get_next_index. It is opened there because this is what | |
1519 | * allows us to grab a reference to the file with stream lock | |
1520 | * held, thus protecting us against overwrite caused by | |
1521 | * tracefile rotation. Since tracefile rotation unlinks the old | |
1522 | * data file, we are ensured that we won't have our data | |
1523 | * overwritten under us. | |
1524 | */ | |
f04a971b | 1525 | ret = check_new_streams(conn); |
4a9daf17 | 1526 | if (ret < 0) { |
9a78c92e | 1527 | goto end_free; |
4a9daf17 | 1528 | } else if (ret == 1) { |
c4e361a4 | 1529 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
4a9daf17 JD |
1530 | reply.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; |
1531 | goto send_reply; | |
1532 | } | |
1533 | ||
d3e2ba59 JD |
1534 | len = be32toh(get_packet_info.len); |
1535 | data = zmalloc(len); | |
1536 | if (!data) { | |
1537 | PERROR("relay data zmalloc"); | |
1538 | goto error; | |
1539 | } | |
1540 | ||
9a78c92e MD |
1541 | ret = lseek(vstream->stream_fd->fd, be64toh(get_packet_info.offset), |
1542 | SEEK_SET); | |
d3e2ba59 | 1543 | if (ret < 0) { |
9a78c92e MD |
1544 | PERROR("lseek fd %d to offset %" PRIu64, vstream->stream_fd->fd, |
1545 | be64toh(get_packet_info.offset)); | |
1546 | goto error; | |
d3e2ba59 | 1547 | } |
9a78c92e | 1548 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1549 | if (read_len < len) { |
9a78c92e MD |
1550 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, |
1551 | vstream->stream_fd->fd, | |
1552 | be64toh(get_packet_info.offset)); | |
1553 | goto error; | |
d3e2ba59 | 1554 | } |
c4e361a4 | 1555 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1556 | reply.len = htobe32(len); |
1557 | send_data = 1; | |
1558 | goto send_reply; | |
1559 | ||
1560 | error: | |
c4e361a4 | 1561 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1562 | |
1563 | send_reply: | |
9a78c92e MD |
1564 | if (vstream) { |
1565 | pthread_mutex_unlock(&vstream->stream->lock); | |
1566 | } | |
1567 | send_reply_nolock: | |
d3e2ba59 | 1568 | reply.flags = htobe32(reply.flags); |
eea7556c MD |
1569 | |
1570 | health_code_update(); | |
2f8f53af | 1571 | |
58eb9381 | 1572 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1573 | if (ret < 0) { |
9a78c92e | 1574 | goto end_free; |
d3e2ba59 | 1575 | } |
eea7556c | 1576 | health_code_update(); |
d3e2ba59 JD |
1577 | |
1578 | if (send_data) { | |
eea7556c | 1579 | health_code_update(); |
58eb9381 | 1580 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1581 | if (ret < 0) { |
9a78c92e | 1582 | goto end_free; |
d3e2ba59 | 1583 | } |
eea7556c | 1584 | health_code_update(); |
d3e2ba59 JD |
1585 | } |
1586 | ||
1587 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1588 | be64toh(get_packet_info.stream_id)); | |
1589 | ||
9a78c92e | 1590 | end_free: |
d3e2ba59 | 1591 | free(data); |
d3e2ba59 | 1592 | end: |
9a78c92e MD |
1593 | if (vstream) { |
1594 | viewer_stream_put(vstream); | |
1595 | } | |
d3e2ba59 JD |
1596 | return ret; |
1597 | } | |
1598 | ||
1599 | /* | |
1600 | * Send the session's metadata | |
1601 | * | |
1602 | * Return 0 on success else a negative value. | |
1603 | */ | |
1604 | static | |
58eb9381 | 1605 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1606 | { |
1607 | int ret = 0; | |
1608 | ssize_t read_len; | |
1609 | uint64_t len = 0; | |
1610 | char *data = NULL; | |
1611 | struct lttng_viewer_get_metadata request; | |
1612 | struct lttng_viewer_metadata_packet reply; | |
9a78c92e | 1613 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1614 | |
58eb9381 | 1615 | assert(conn); |
d3e2ba59 JD |
1616 | |
1617 | DBG("Relay get metadata"); | |
1618 | ||
eea7556c | 1619 | health_code_update(); |
2f8f53af | 1620 | |
58eb9381 | 1621 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1622 | if (ret < 0) { |
d3e2ba59 JD |
1623 | goto end; |
1624 | } | |
eea7556c | 1625 | health_code_update(); |
d3e2ba59 | 1626 | |
53efb85a MD |
1627 | memset(&reply, 0, sizeof(reply)); |
1628 | ||
9a78c92e MD |
1629 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1630 | if (!vstream) { | |
1631 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); | |
1632 | goto send_reply; | |
d3e2ba59 | 1633 | } |
9a78c92e MD |
1634 | pthread_mutex_lock(&vstream->stream->lock); |
1635 | if (!vstream->stream->is_metadata) { | |
1636 | ERR("Invalid metadata stream"); | |
6763619c JD |
1637 | goto error; |
1638 | } | |
1639 | ||
9a78c92e | 1640 | assert(vstream->metadata_sent <= vstream->stream->metadata_received); |
2a174661 | 1641 | |
9a78c92e | 1642 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
d3e2ba59 | 1643 | if (len == 0) { |
c4e361a4 | 1644 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1645 | goto send_reply; |
1646 | } | |
1647 | ||
1648 | /* first time, we open the metadata file */ | |
9a78c92e | 1649 | if (!vstream->stream_fd) { |
d3e2ba59 JD |
1650 | char fullpath[PATH_MAX]; |
1651 | ||
9a78c92e MD |
1652 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", vstream->path_name, |
1653 | vstream->channel_name); | |
d3e2ba59 JD |
1654 | if (ret < 0) { |
1655 | goto error; | |
1656 | } | |
1657 | ret = open(fullpath, O_RDONLY); | |
1658 | if (ret < 0) { | |
1659 | PERROR("Relay opening metadata file"); | |
1660 | goto error; | |
1661 | } | |
9a78c92e MD |
1662 | vstream->stream_fd = stream_fd_create(ret); |
1663 | if (!vstream->stream_fd) { | |
1664 | if (close(ret)) { | |
1665 | PERROR("close"); | |
1666 | } | |
1667 | goto error; | |
1668 | } | |
d3e2ba59 JD |
1669 | } |
1670 | ||
1671 | reply.len = htobe64(len); | |
1672 | data = zmalloc(len); | |
1673 | if (!data) { | |
1674 | PERROR("viewer metadata zmalloc"); | |
1675 | goto error; | |
1676 | } | |
1677 | ||
9a78c92e | 1678 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1679 | if (read_len < len) { |
d3e2ba59 JD |
1680 | PERROR("Relay reading metadata file"); |
1681 | goto error; | |
1682 | } | |
9a78c92e MD |
1683 | vstream->metadata_sent += read_len; |
1684 | if (vstream->metadata_sent == vstream->stream->metadata_received | |
1685 | && vstream->stream->closed) { | |
1686 | /* Release ownership for the viewer metadata stream. */ | |
1687 | viewer_stream_put(vstream); | |
1688 | } | |
1689 | ||
c4e361a4 | 1690 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
9a78c92e | 1691 | |
d3e2ba59 JD |
1692 | goto send_reply; |
1693 | ||
1694 | error: | |
c4e361a4 | 1695 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1696 | |
1697 | send_reply: | |
eea7556c | 1698 | health_code_update(); |
9a78c92e MD |
1699 | if (vstream) { |
1700 | pthread_mutex_unlock(&vstream->stream->lock); | |
1701 | } | |
58eb9381 | 1702 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1703 | if (ret < 0) { |
9a78c92e | 1704 | goto end_free; |
d3e2ba59 | 1705 | } |
eea7556c | 1706 | health_code_update(); |
d3e2ba59 JD |
1707 | |
1708 | if (len > 0) { | |
58eb9381 | 1709 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1710 | if (ret < 0) { |
9a78c92e | 1711 | goto end_free; |
d3e2ba59 JD |
1712 | } |
1713 | } | |
1714 | ||
1715 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1716 | be64toh(request.stream_id)); | |
1717 | ||
1718 | DBG("Metadata sent"); | |
1719 | ||
9a78c92e | 1720 | end_free: |
d3e2ba59 | 1721 | free(data); |
d3e2ba59 | 1722 | end: |
9a78c92e MD |
1723 | if (vstream) { |
1724 | viewer_stream_put(vstream); | |
1725 | } | |
d3e2ba59 JD |
1726 | return ret; |
1727 | } | |
1728 | ||
c3b7390b JD |
1729 | /* |
1730 | * Create a viewer session. | |
1731 | * | |
1732 | * Return 0 on success or else a negative value. | |
1733 | */ | |
1734 | static | |
1735 | int viewer_create_session(struct relay_connection *conn) | |
1736 | { | |
1737 | int ret; | |
1738 | struct lttng_viewer_create_session_response resp; | |
1739 | ||
1740 | DBG("Viewer create session received"); | |
1741 | ||
53efb85a | 1742 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1743 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
9a78c92e | 1744 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
1745 | if (!conn->viewer_session) { |
1746 | ERR("Allocation viewer session"); | |
1747 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1748 | goto send_reply; | |
1749 | } | |
c3b7390b JD |
1750 | |
1751 | send_reply: | |
1752 | health_code_update(); | |
1753 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1754 | if (ret < 0) { | |
1755 | goto end; | |
1756 | } | |
1757 | health_code_update(); | |
1758 | ret = 0; | |
1759 | ||
1760 | end: | |
1761 | return ret; | |
1762 | } | |
1763 | ||
1764 | ||
d3e2ba59 JD |
1765 | /* |
1766 | * live_relay_unknown_command: send -1 if received unknown command | |
1767 | */ | |
1768 | static | |
58eb9381 | 1769 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1770 | { |
1771 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1772 | |
53efb85a | 1773 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1774 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1775 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1776 | } |
1777 | ||
1778 | /* | |
1779 | * Process the commands received on the control socket | |
1780 | */ | |
1781 | static | |
1782 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1783 | struct relay_connection *conn) |
d3e2ba59 JD |
1784 | { |
1785 | int ret = 0; | |
2f8f53af DG |
1786 | uint32_t msg_value; |
1787 | ||
2f8f53af DG |
1788 | msg_value = be32toh(recv_hdr->cmd); |
1789 | ||
1790 | /* | |
1791 | * Make sure we've done the version check before any command other then a | |
1792 | * new client connection. | |
1793 | */ | |
c4e361a4 | 1794 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1795 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1796 | ret = -1; |
1797 | goto end; | |
1798 | } | |
d3e2ba59 | 1799 | |
2f8f53af | 1800 | switch (msg_value) { |
c4e361a4 | 1801 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1802 | ret = viewer_connect(conn); |
d3e2ba59 | 1803 | break; |
c4e361a4 | 1804 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1805 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1806 | break; |
c4e361a4 | 1807 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1808 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1809 | break; |
c4e361a4 | 1810 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1811 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1812 | break; |
c4e361a4 | 1813 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1814 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1815 | break; |
c4e361a4 | 1816 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1817 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1818 | break; |
c4e361a4 | 1819 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1820 | ret = viewer_get_new_streams(conn); |
80e8027a | 1821 | break; |
c3b7390b JD |
1822 | case LTTNG_VIEWER_CREATE_SESSION: |
1823 | ret = viewer_create_session(conn); | |
1824 | break; | |
d3e2ba59 | 1825 | default: |
9a78c92e MD |
1826 | ERR("Received unknown viewer command (%u)", |
1827 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 1828 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1829 | ret = -1; |
1830 | goto end; | |
1831 | } | |
1832 | ||
1833 | end: | |
1834 | return ret; | |
1835 | } | |
1836 | ||
1837 | static | |
58eb9381 | 1838 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1839 | { |
1840 | int ret; | |
1841 | ||
58eb9381 | 1842 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1843 | |
1844 | ret = close(pollfd); | |
1845 | if (ret < 0) { | |
1846 | ERR("Closing pollfd %d", pollfd); | |
1847 | } | |
1848 | } | |
1849 | ||
d3e2ba59 JD |
1850 | /* |
1851 | * This thread does the actual work | |
1852 | */ | |
1853 | static | |
1854 | void *thread_worker(void *data) | |
1855 | { | |
1856 | int ret, err = -1; | |
1857 | uint32_t nb_fd; | |
d3e2ba59 | 1858 | struct lttng_poll_event events; |
9a78c92e | 1859 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
1860 | struct lttng_ht_iter iter; |
1861 | struct lttng_viewer_cmd recv_hdr; | |
f89048c1 | 1862 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
1863 | |
1864 | DBG("[thread] Live viewer relay worker started"); | |
1865 | ||
1866 | rcu_register_thread(); | |
1867 | ||
eea7556c MD |
1868 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1869 | ||
9b5e0863 MD |
1870 | if (testpoint(relayd_thread_live_worker)) { |
1871 | goto error_testpoint; | |
1872 | } | |
1873 | ||
d3e2ba59 | 1874 | /* table of connections indexed on socket */ |
9a78c92e MD |
1875 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1876 | if (!viewer_connections_ht) { | |
1877 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
1878 | } |
1879 | ||
1880 | ret = create_thread_poll_set(&events, 2); | |
1881 | if (ret < 0) { | |
1882 | goto error_poll_create; | |
1883 | } | |
1884 | ||
58eb9381 | 1885 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1886 | if (ret < 0) { |
1887 | goto error; | |
1888 | } | |
1889 | ||
1890 | restart: | |
1891 | while (1) { | |
1892 | int i; | |
1893 | ||
eea7556c MD |
1894 | health_code_update(); |
1895 | ||
d3e2ba59 JD |
1896 | /* Infinite blocking call, waiting for transmission */ |
1897 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1898 | health_poll_entry(); |
d3e2ba59 | 1899 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1900 | health_poll_exit(); |
d3e2ba59 JD |
1901 | if (ret < 0) { |
1902 | /* | |
1903 | * Restart interrupted system call. | |
1904 | */ | |
1905 | if (errno == EINTR) { | |
1906 | goto restart; | |
1907 | } | |
1908 | goto error; | |
1909 | } | |
1910 | ||
1911 | nb_fd = ret; | |
1912 | ||
1913 | /* | |
1914 | * Process control. The control connection is prioritised so we don't | |
1915 | * starve it with high throughput tracing data on the data | |
1916 | * connection. | |
1917 | */ | |
1918 | for (i = 0; i < nb_fd; i++) { | |
1919 | /* Fetch once the poll data */ | |
1920 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1921 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1922 | ||
eea7556c MD |
1923 | health_code_update(); |
1924 | ||
e0077699 MD |
1925 | if (!revents) { |
1926 | /* No activity for this FD (poll implementation). */ | |
1927 | continue; | |
1928 | } | |
1929 | ||
d3e2ba59 | 1930 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 1931 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
1932 | if (ret) { |
1933 | err = 0; | |
1934 | goto exit; | |
1935 | } | |
1936 | ||
9a78c92e | 1937 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 1938 | if (pollfd == live_conn_pipe[0]) { |
d3e2ba59 JD |
1939 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1940 | ERR("Relay live pipe error"); | |
1941 | goto error; | |
1942 | } else if (revents & LPOLLIN) { | |
f89048c1 JG |
1943 | struct relay_connection *conn; |
1944 | ||
9a78c92e MD |
1945 | ret = lttng_read(live_conn_pipe[0], |
1946 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
1947 | if (ret < 0) { |
1948 | goto error; | |
1949 | } | |
58eb9381 DG |
1950 | lttng_poll_add(&events, conn->sock->fd, |
1951 | LPOLLIN | LPOLLRDHUP); | |
9a78c92e MD |
1952 | connection_ht_add(viewer_connections_ht, conn); |
1953 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
d3e2ba59 | 1954 | } |
58eb9381 | 1955 | } else { |
9a78c92e | 1956 | /* Connection activity. */ |
f89048c1 JG |
1957 | struct relay_connection *conn; |
1958 | ||
9a78c92e MD |
1959 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
1960 | if (!conn) { | |
1961 | continue; | |
1962 | } | |
58eb9381 DG |
1963 | |
1964 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1965 | cleanup_connection_pollfd(&events, pollfd); | |
9a78c92e MD |
1966 | /* Put "create" ownership reference. */ |
1967 | connection_put(conn); | |
d3e2ba59 | 1968 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
1969 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
1970 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 1971 | if (ret <= 0) { |
9a78c92e | 1972 | /* Connection closed. */ |
58eb9381 | 1973 | cleanup_connection_pollfd(&events, pollfd); |
9a78c92e MD |
1974 | /* Put "create" ownership reference. */ |
1975 | connection_put(conn); | |
58eb9381 | 1976 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 1977 | } else { |
58eb9381 | 1978 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
1979 | if (ret < 0) { |
1980 | /* Clear the session on error. */ | |
58eb9381 | 1981 | cleanup_connection_pollfd(&events, pollfd); |
9a78c92e MD |
1982 | /* Put "create" ownership reference. */ |
1983 | connection_put(conn); | |
d3e2ba59 JD |
1984 | DBG("Viewer connection closed with %d", pollfd); |
1985 | } | |
1986 | } | |
1987 | } | |
9a78c92e MD |
1988 | /* Put local "get_by_sock" reference. */ |
1989 | connection_put(conn); | |
d3e2ba59 JD |
1990 | } |
1991 | } | |
1992 | } | |
1993 | ||
1994 | exit: | |
1995 | error: | |
1996 | lttng_poll_clean(&events); | |
1997 | ||
58eb9381 | 1998 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 1999 | rcu_read_lock(); |
9a78c92e | 2000 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
f89048c1 | 2001 | destroy_conn, |
58eb9381 | 2002 | sock_n.node) { |
eea7556c | 2003 | health_code_update(); |
9a78c92e | 2004 | connection_put(destroy_conn); |
d3e2ba59 JD |
2005 | } |
2006 | rcu_read_unlock(); | |
2007 | error_poll_create: | |
9a78c92e MD |
2008 | lttng_ht_destroy(viewer_connections_ht); |
2009 | viewer_connections_ht_error: | |
58eb9381 DG |
2010 | /* Close relay conn pipes */ |
2011 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
2012 | if (err) { |
2013 | DBG("Viewer worker thread exited with error"); | |
2014 | } | |
2015 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2016 | error_testpoint: |
eea7556c MD |
2017 | if (err) { |
2018 | health_error(); | |
2019 | ERR("Health error occurred in %s", __func__); | |
2020 | } | |
2021 | health_unregister(health_relayd); | |
770f96f4 MD |
2022 | if (lttng_relay_stop_threads()) { |
2023 | ERR("Error stopping threads"); | |
77c54fed | 2024 | } |
d3e2ba59 JD |
2025 | rcu_unregister_thread(); |
2026 | return NULL; | |
2027 | } | |
2028 | ||
2029 | /* | |
2030 | * Create the relay command pipe to wake thread_manage_apps. | |
2031 | * Closed in cleanup(). | |
2032 | */ | |
58eb9381 | 2033 | static int create_conn_pipe(void) |
d3e2ba59 | 2034 | { |
77c54fed MD |
2035 | return utils_create_pipe_cloexec(live_conn_pipe); |
2036 | } | |
d3e2ba59 | 2037 | |
77c54fed | 2038 | int relayd_live_join(void) |
d3e2ba59 | 2039 | { |
77c54fed | 2040 | int ret, retval = 0; |
d3e2ba59 JD |
2041 | void *status; |
2042 | ||
d3e2ba59 | 2043 | ret = pthread_join(live_listener_thread, &status); |
77c54fed MD |
2044 | if (ret) { |
2045 | errno = ret; | |
d3e2ba59 | 2046 | PERROR("pthread_join live listener"); |
77c54fed | 2047 | retval = -1; |
d3e2ba59 JD |
2048 | } |
2049 | ||
2050 | ret = pthread_join(live_worker_thread, &status); | |
77c54fed MD |
2051 | if (ret) { |
2052 | errno = ret; | |
d3e2ba59 | 2053 | PERROR("pthread_join live worker"); |
77c54fed | 2054 | retval = -1; |
d3e2ba59 JD |
2055 | } |
2056 | ||
2057 | ret = pthread_join(live_dispatcher_thread, &status); | |
77c54fed MD |
2058 | if (ret) { |
2059 | errno = ret; | |
d3e2ba59 | 2060 | PERROR("pthread_join live dispatcher"); |
77c54fed | 2061 | retval = -1; |
d3e2ba59 JD |
2062 | } |
2063 | ||
77c54fed | 2064 | cleanup_relayd_live(); |
d3e2ba59 | 2065 | |
77c54fed | 2066 | return retval; |
d3e2ba59 JD |
2067 | } |
2068 | ||
2069 | /* | |
2070 | * main | |
2071 | */ | |
9a78c92e | 2072 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2073 | { |
77c54fed | 2074 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2075 | void *status; |
2076 | int is_root; | |
2077 | ||
77c54fed MD |
2078 | if (!uri) { |
2079 | retval = -1; | |
2080 | goto exit_init_data; | |
2081 | } | |
d3e2ba59 JD |
2082 | live_uri = uri; |
2083 | ||
d3e2ba59 JD |
2084 | /* Check if daemon is UID = 0 */ |
2085 | is_root = !getuid(); | |
2086 | ||
2087 | if (!is_root) { | |
2088 | if (live_uri->port < 1024) { | |
2089 | ERR("Need to be root to use ports < 1024"); | |
77c54fed MD |
2090 | retval = -1; |
2091 | goto exit_init_data; | |
d3e2ba59 JD |
2092 | } |
2093 | } | |
2094 | ||
2095 | /* Setup the thread apps communication pipe. */ | |
77c54fed MD |
2096 | if (create_conn_pipe()) { |
2097 | retval = -1; | |
2098 | goto exit_init_data; | |
d3e2ba59 JD |
2099 | } |
2100 | ||
2101 | /* Init relay command queue. */ | |
8bdee6e2 | 2102 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2103 | |
2104 | /* Set up max poll set size */ | |
2105 | lttng_poll_set_max_size(); | |
2106 | ||
2107 | /* Setup the dispatcher thread */ | |
2108 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2109 | thread_dispatcher, (void *) NULL); | |
77c54fed MD |
2110 | if (ret) { |
2111 | errno = ret; | |
d3e2ba59 | 2112 | PERROR("pthread_create viewer dispatcher"); |
77c54fed MD |
2113 | retval = -1; |
2114 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2115 | } |
2116 | ||
2117 | /* Setup the worker thread */ | |
2118 | ret = pthread_create(&live_worker_thread, NULL, | |
9a78c92e | 2119 | thread_worker, NULL); |
77c54fed MD |
2120 | if (ret) { |
2121 | errno = ret; | |
d3e2ba59 | 2122 | PERROR("pthread_create viewer worker"); |
77c54fed MD |
2123 | retval = -1; |
2124 | goto exit_worker_thread; | |
d3e2ba59 JD |
2125 | } |
2126 | ||
2127 | /* Setup the listener thread */ | |
2128 | ret = pthread_create(&live_listener_thread, NULL, | |
2129 | thread_listener, (void *) NULL); | |
77c54fed MD |
2130 | if (ret) { |
2131 | errno = ret; | |
d3e2ba59 | 2132 | PERROR("pthread_create viewer listener"); |
77c54fed MD |
2133 | retval = -1; |
2134 | goto exit_listener_thread; | |
d3e2ba59 JD |
2135 | } |
2136 | ||
77c54fed MD |
2137 | /* |
2138 | * All OK, started all threads. | |
2139 | */ | |
2140 | return retval; | |
2141 | ||
bafd3fc0 JG |
2142 | /* |
2143 | * Join on the live_listener_thread should anything be added after | |
2144 | * the live_listener thread's creation. | |
2145 | */ | |
d3e2ba59 | 2146 | |
77c54fed | 2147 | exit_listener_thread: |
d3e2ba59 | 2148 | |
d3e2ba59 | 2149 | ret = pthread_join(live_worker_thread, &status); |
77c54fed MD |
2150 | if (ret) { |
2151 | errno = ret; | |
d3e2ba59 | 2152 | PERROR("pthread_join live worker"); |
77c54fed | 2153 | retval = -1; |
d3e2ba59 | 2154 | } |
77c54fed | 2155 | exit_worker_thread: |
d3e2ba59 | 2156 | |
d3e2ba59 | 2157 | ret = pthread_join(live_dispatcher_thread, &status); |
77c54fed MD |
2158 | if (ret) { |
2159 | errno = ret; | |
d3e2ba59 | 2160 | PERROR("pthread_join live dispatcher"); |
77c54fed | 2161 | retval = -1; |
d3e2ba59 | 2162 | } |
77c54fed | 2163 | exit_dispatcher_thread: |
d3e2ba59 | 2164 | |
77c54fed MD |
2165 | exit_init_data: |
2166 | cleanup_relayd_live(); | |
d3e2ba59 | 2167 | |
77c54fed | 2168 | return retval; |
d3e2ba59 | 2169 | } |