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); | |
9e09d5b6 MD |
234 | if (lttng_strncpy(send_stream.path_name, vstream->path_name, |
235 | sizeof(send_stream.path_name))) { | |
236 | pthread_mutex_unlock(&vstream->stream->lock); | |
237 | viewer_stream_put(vstream); | |
238 | ret = -1; /* Error. */ | |
239 | goto end_unlock; | |
240 | } | |
241 | if (lttng_strncpy(send_stream.channel_name, | |
242 | vstream->channel_name, | |
243 | sizeof(send_stream.channel_name))) { | |
244 | pthread_mutex_unlock(&vstream->stream->lock); | |
245 | viewer_stream_put(vstream); | |
246 | ret = -1; /* Error. */ | |
247 | goto end_unlock; | |
248 | } | |
2f8f53af | 249 | |
9a78c92e MD |
250 | DBG("Sending stream %" PRIu64 " to viewer", |
251 | vstream->stream->stream_handle); | |
252 | vstream->sent_flag = 1; | |
253 | pthread_mutex_unlock(&vstream->stream->lock); | |
254 | ||
2f8f53af | 255 | ret = send_response(sock, &send_stream, sizeof(send_stream)); |
9a78c92e | 256 | viewer_stream_put(vstream); |
2f8f53af DG |
257 | if (ret < 0) { |
258 | goto end_unlock; | |
259 | } | |
2f8f53af DG |
260 | } |
261 | ||
262 | ret = 0; | |
263 | ||
264 | end_unlock: | |
265 | rcu_read_unlock(); | |
266 | return ret; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Create every viewer stream possible for the given session with the seek | |
271 | * type. Three counters *can* be return which are in order the total amount of | |
272 | * viewer stream of the session, the number of unsent stream and the number of | |
273 | * stream created. Those counters can be NULL and thus will be ignored. | |
274 | * | |
275 | * Return 0 on success or else a negative value. | |
276 | */ | |
277 | static | |
278 | int make_viewer_streams(struct relay_session *session, | |
279 | enum lttng_viewer_seek seek_t, uint32_t *nb_total, uint32_t *nb_unsent, | |
11436961 | 280 | uint32_t *nb_created, bool *closed) |
2f8f53af DG |
281 | { |
282 | int ret; | |
2f8f53af | 283 | struct lttng_ht_iter iter; |
2a174661 | 284 | struct ctf_trace *ctf_trace; |
2f8f53af DG |
285 | |
286 | assert(session); | |
287 | ||
288 | /* | |
9a78c92e MD |
289 | * Hold the session lock to ensure that we see either none or |
290 | * all initial streams for a session, but no intermediate state. | |
2f8f53af | 291 | */ |
9a78c92e | 292 | pthread_mutex_lock(&session->lock); |
2f8f53af | 293 | |
11436961 MD |
294 | if (session->connection_closed) { |
295 | *closed = true; | |
296 | } | |
297 | ||
2f8f53af | 298 | /* |
9a78c92e MD |
299 | * Create viewer streams for relay streams that are ready to be |
300 | * used for a the given session id only. | |
2f8f53af | 301 | */ |
2a174661 DG |
302 | rcu_read_lock(); |
303 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
304 | node.node) { | |
305 | struct relay_stream *stream; | |
2f8f53af DG |
306 | |
307 | health_code_update(); | |
308 | ||
9a78c92e | 309 | if (!ctf_trace_get(ctf_trace)) { |
2f8f53af DG |
310 | continue; |
311 | } | |
312 | ||
9a78c92e | 313 | cds_list_for_each_entry_rcu(stream, &ctf_trace->stream_list, stream_node) { |
2a174661 DG |
314 | struct relay_viewer_stream *vstream; |
315 | ||
9a78c92e | 316 | if (!stream_get(stream)) { |
2a174661 DG |
317 | continue; |
318 | } | |
9a78c92e | 319 | /* |
db271c7d | 320 | * stream published is protected by the session lock. |
9a78c92e MD |
321 | */ |
322 | if (!stream->published) { | |
323 | goto next; | |
324 | } | |
325 | vstream = viewer_stream_get_by_id(stream->stream_handle); | |
2f8f53af | 326 | if (!vstream) { |
9a78c92e | 327 | vstream = viewer_stream_create(stream, seek_t); |
2a174661 DG |
328 | if (!vstream) { |
329 | ret = -1; | |
9a78c92e MD |
330 | ctf_trace_put(ctf_trace); |
331 | stream_put(stream); | |
2a174661 DG |
332 | goto error_unlock; |
333 | } | |
2a174661 DG |
334 | |
335 | if (nb_created) { | |
336 | /* Update number of created stream counter. */ | |
337 | (*nb_created)++; | |
338 | } | |
64bda0b4 MD |
339 | /* |
340 | * Ensure a self-reference is preserved even | |
341 | * after we have put our local reference. | |
342 | */ | |
343 | viewer_stream_get(vstream); | |
9a78c92e MD |
344 | } else { |
345 | if (!vstream->sent_flag && nb_unsent) { | |
346 | /* Update number of unsent stream counter. */ | |
347 | (*nb_unsent)++; | |
348 | } | |
2f8f53af | 349 | } |
2a174661 DG |
350 | /* Update number of total stream counter. */ |
351 | if (nb_total) { | |
64bda0b4 MD |
352 | if (stream->is_metadata) { |
353 | if (!stream->closed || | |
354 | stream->metadata_received > vstream->metadata_sent) { | |
355 | (*nb_total)++; | |
356 | } | |
357 | } else { | |
358 | if (!stream->closed || | |
359 | !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
360 | ||
361 | (*nb_total)++; | |
362 | } | |
363 | } | |
2f8f53af | 364 | } |
64bda0b4 MD |
365 | /* Put local reference. */ |
366 | viewer_stream_put(vstream); | |
9a78c92e MD |
367 | next: |
368 | stream_put(stream); | |
2f8f53af | 369 | } |
9a78c92e | 370 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
371 | } |
372 | ||
373 | ret = 0; | |
374 | ||
375 | error_unlock: | |
2a174661 | 376 | rcu_read_unlock(); |
9a78c92e | 377 | pthread_mutex_unlock(&session->lock); |
2f8f53af DG |
378 | return ret; |
379 | } | |
380 | ||
770f96f4 | 381 | int relayd_live_stop(void) |
d3e2ba59 | 382 | { |
770f96f4 | 383 | /* Stop dispatch thread */ |
d3e2ba59 | 384 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 385 | futex_nto1_wake(&viewer_conn_queue.futex); |
770f96f4 | 386 | return 0; |
d3e2ba59 JD |
387 | } |
388 | ||
d3e2ba59 JD |
389 | /* |
390 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
391 | */ | |
392 | static | |
393 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
394 | { | |
395 | int ret; | |
396 | ||
397 | if (events == NULL || size == 0) { | |
398 | ret = -1; | |
399 | goto error; | |
400 | } | |
401 | ||
402 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
403 | if (ret < 0) { | |
404 | goto error; | |
405 | } | |
406 | ||
407 | /* Add quit pipe */ | |
bcf4a440 | 408 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
409 | if (ret < 0) { |
410 | goto error; | |
411 | } | |
412 | ||
413 | return 0; | |
414 | ||
415 | error: | |
416 | return ret; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Check if the thread quit pipe was triggered. | |
421 | * | |
422 | * Return 1 if it was triggered else 0; | |
423 | */ | |
424 | static | |
bcf4a440 | 425 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 426 | { |
bcf4a440 | 427 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
428 | return 1; |
429 | } | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
434 | /* | |
435 | * Create and init socket from uri. | |
436 | */ | |
437 | static | |
438 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
439 | { | |
440 | int ret; | |
441 | struct lttcomm_sock *sock = NULL; | |
442 | ||
443 | sock = lttcomm_alloc_sock_from_uri(uri); | |
444 | if (sock == NULL) { | |
445 | ERR("Allocating socket"); | |
446 | goto error; | |
447 | } | |
448 | ||
449 | ret = lttcomm_create_sock(sock); | |
450 | if (ret < 0) { | |
451 | goto error; | |
452 | } | |
453 | DBG("Listening on sock %d for live", sock->fd); | |
454 | ||
455 | ret = sock->ops->bind(sock); | |
456 | if (ret < 0) { | |
457 | goto error; | |
458 | } | |
459 | ||
460 | ret = sock->ops->listen(sock, -1); | |
461 | if (ret < 0) { | |
462 | goto error; | |
463 | ||
464 | } | |
465 | ||
466 | return sock; | |
467 | ||
468 | error: | |
469 | if (sock) { | |
470 | lttcomm_destroy_sock(sock); | |
471 | } | |
472 | return NULL; | |
473 | } | |
474 | ||
475 | /* | |
476 | * This thread manages the listening for new connections on the network | |
477 | */ | |
478 | static | |
479 | void *thread_listener(void *data) | |
480 | { | |
481 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
482 | uint32_t revents, nb_fd; |
483 | struct lttng_poll_event events; | |
484 | struct lttcomm_sock *live_control_sock; | |
485 | ||
486 | DBG("[thread] Relay live listener started"); | |
487 | ||
eea7556c MD |
488 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
489 | ||
490 | health_code_update(); | |
491 | ||
d3e2ba59 JD |
492 | live_control_sock = init_socket(live_uri); |
493 | if (!live_control_sock) { | |
494 | goto error_sock_control; | |
495 | } | |
496 | ||
fb4d42ab | 497 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
d3e2ba59 JD |
498 | ret = create_thread_poll_set(&events, 2); |
499 | if (ret < 0) { | |
500 | goto error_create_poll; | |
501 | } | |
502 | ||
503 | /* Add the control socket */ | |
504 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
505 | if (ret < 0) { | |
506 | goto error_poll_add; | |
507 | } | |
508 | ||
3fd27398 MD |
509 | lttng_relay_notify_ready(); |
510 | ||
9b5e0863 MD |
511 | if (testpoint(relayd_thread_live_listener)) { |
512 | goto error_testpoint; | |
513 | } | |
514 | ||
d3e2ba59 | 515 | while (1) { |
eea7556c MD |
516 | health_code_update(); |
517 | ||
d3e2ba59 JD |
518 | DBG("Listener accepting live viewers connections"); |
519 | ||
520 | restart: | |
eea7556c | 521 | health_poll_entry(); |
d3e2ba59 | 522 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 523 | health_poll_exit(); |
d3e2ba59 JD |
524 | if (ret < 0) { |
525 | /* | |
526 | * Restart interrupted system call. | |
527 | */ | |
528 | if (errno == EINTR) { | |
529 | goto restart; | |
530 | } | |
531 | goto error; | |
532 | } | |
533 | nb_fd = ret; | |
534 | ||
535 | DBG("Relay new viewer connection received"); | |
536 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
537 | health_code_update(); |
538 | ||
d3e2ba59 JD |
539 | /* Fetch once the poll data */ |
540 | revents = LTTNG_POLL_GETEV(&events, i); | |
541 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
542 | ||
e0077699 MD |
543 | if (!revents) { |
544 | /* No activity for this FD (poll implementation). */ | |
545 | continue; | |
546 | } | |
547 | ||
d3e2ba59 | 548 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 549 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
550 | if (ret) { |
551 | err = 0; | |
552 | goto exit; | |
553 | } | |
554 | ||
584fc280 | 555 | if (revents & LPOLLIN) { |
d3e2ba59 | 556 | /* |
9a78c92e MD |
557 | * A new connection is requested, therefore a |
558 | * viewer connection is allocated in this | |
559 | * thread, enqueued to a global queue and | |
560 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 561 | */ |
58eb9381 DG |
562 | int val = 1; |
563 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
564 | struct lttcomm_sock *newsock; |
565 | ||
d3e2ba59 JD |
566 | newsock = live_control_sock->ops->accept(live_control_sock); |
567 | if (!newsock) { | |
568 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
569 | goto error; |
570 | } | |
571 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 572 | |
d3e2ba59 | 573 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 574 | sizeof(val)); |
d3e2ba59 JD |
575 | if (ret < 0) { |
576 | PERROR("setsockopt inet"); | |
577 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
578 | goto error; |
579 | } | |
9a78c92e MD |
580 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
581 | if (!new_conn) { | |
582 | lttcomm_destroy_sock(newsock); | |
583 | goto error; | |
584 | } | |
585 | /* Ownership assumed by the connection. */ | |
586 | newsock = NULL; | |
d3e2ba59 | 587 | |
58eb9381 | 588 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
589 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
590 | &new_conn->qnode); | |
d3e2ba59 JD |
591 | |
592 | /* | |
9a78c92e MD |
593 | * Wake the dispatch queue futex. |
594 | * Implicit memory barrier with the | |
595 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 596 | */ |
58eb9381 | 597 | futex_nto1_wake(&viewer_conn_queue.futex); |
584fc280 MD |
598 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
599 | ERR("socket poll error"); | |
600 | goto error; | |
601 | } else { | |
602 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
603 | goto error; | |
d3e2ba59 JD |
604 | } |
605 | } | |
606 | } | |
607 | ||
608 | exit: | |
609 | error: | |
610 | error_poll_add: | |
9b5e0863 | 611 | error_testpoint: |
d3e2ba59 JD |
612 | lttng_poll_clean(&events); |
613 | error_create_poll: | |
614 | if (live_control_sock->fd >= 0) { | |
615 | ret = live_control_sock->ops->close(live_control_sock); | |
616 | if (ret) { | |
617 | PERROR("close"); | |
618 | } | |
619 | } | |
620 | lttcomm_destroy_sock(live_control_sock); | |
621 | error_sock_control: | |
622 | if (err) { | |
eea7556c | 623 | health_error(); |
d3e2ba59 JD |
624 | DBG("Live viewer listener thread exited with error"); |
625 | } | |
eea7556c | 626 | health_unregister(health_relayd); |
d3e2ba59 | 627 | DBG("Live viewer listener thread cleanup complete"); |
770f96f4 MD |
628 | if (lttng_relay_stop_threads()) { |
629 | ERR("Error stopping threads"); | |
77c54fed | 630 | } |
d3e2ba59 JD |
631 | return NULL; |
632 | } | |
633 | ||
634 | /* | |
635 | * This thread manages the dispatching of the requests to worker threads | |
636 | */ | |
637 | static | |
638 | void *thread_dispatcher(void *data) | |
639 | { | |
6cd525e8 MD |
640 | int err = -1; |
641 | ssize_t ret; | |
8bdee6e2 | 642 | struct cds_wfcq_node *node; |
58eb9381 | 643 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
644 | |
645 | DBG("[thread] Live viewer relay dispatcher started"); | |
646 | ||
eea7556c MD |
647 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
648 | ||
9b5e0863 MD |
649 | if (testpoint(relayd_thread_live_dispatcher)) { |
650 | goto error_testpoint; | |
651 | } | |
652 | ||
eea7556c MD |
653 | health_code_update(); |
654 | ||
d3e2ba59 | 655 | while (!CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
eea7556c MD |
656 | health_code_update(); |
657 | ||
d3e2ba59 | 658 | /* Atomically prepare the queue futex */ |
58eb9381 | 659 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 JD |
660 | |
661 | do { | |
eea7556c MD |
662 | health_code_update(); |
663 | ||
d3e2ba59 | 664 | /* Dequeue commands */ |
8bdee6e2 SM |
665 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
666 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
667 | if (node == NULL) { |
668 | DBG("Woken up but nothing in the live-viewer " | |
669 | "relay command queue"); | |
670 | /* Continue thread execution */ | |
671 | break; | |
672 | } | |
58eb9381 | 673 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 674 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 675 | conn->sock->fd); |
d3e2ba59 JD |
676 | |
677 | /* | |
9a78c92e MD |
678 | * Inform worker thread of the new request. This |
679 | * call is blocking so we can be assured that | |
680 | * the data will be read at some point in time | |
681 | * or wait to the end of the world :) | |
d3e2ba59 | 682 | */ |
58eb9381 DG |
683 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
684 | if (ret < 0) { | |
685 | PERROR("write conn pipe"); | |
9a78c92e | 686 | connection_put(conn); |
d3e2ba59 JD |
687 | goto error; |
688 | } | |
689 | } while (node != NULL); | |
690 | ||
691 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 692 | health_poll_entry(); |
58eb9381 | 693 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 694 | health_poll_exit(); |
d3e2ba59 JD |
695 | } |
696 | ||
eea7556c MD |
697 | /* Normal exit, no error */ |
698 | err = 0; | |
699 | ||
d3e2ba59 | 700 | error: |
9b5e0863 | 701 | error_testpoint: |
eea7556c MD |
702 | if (err) { |
703 | health_error(); | |
704 | ERR("Health error occurred in %s", __func__); | |
705 | } | |
706 | health_unregister(health_relayd); | |
d3e2ba59 | 707 | DBG("Live viewer dispatch thread dying"); |
770f96f4 MD |
708 | if (lttng_relay_stop_threads()) { |
709 | ERR("Error stopping threads"); | |
77c54fed | 710 | } |
d3e2ba59 JD |
711 | return NULL; |
712 | } | |
713 | ||
714 | /* | |
715 | * Establish connection with the viewer and check the versions. | |
716 | * | |
717 | * Return 0 on success or else negative value. | |
718 | */ | |
719 | static | |
58eb9381 | 720 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
721 | { |
722 | int ret; | |
723 | struct lttng_viewer_connect reply, msg; | |
724 | ||
58eb9381 | 725 | conn->version_check_done = 1; |
d3e2ba59 | 726 | |
eea7556c MD |
727 | health_code_update(); |
728 | ||
2f8f53af DG |
729 | DBG("Viewer is establishing a connection to the relayd."); |
730 | ||
58eb9381 | 731 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 732 | if (ret < 0) { |
d3e2ba59 JD |
733 | goto end; |
734 | } | |
735 | ||
eea7556c MD |
736 | health_code_update(); |
737 | ||
f46b2ce6 | 738 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
739 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
740 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
741 | ||
742 | /* Major versions must be the same */ | |
743 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
744 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
745 | reply.major, be32toh(msg.major)); | |
72180669 | 746 | ret = -1; |
d3e2ba59 JD |
747 | goto end; |
748 | } | |
749 | ||
58eb9381 | 750 | conn->major = reply.major; |
d3e2ba59 JD |
751 | /* We adapt to the lowest compatible version */ |
752 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 753 | conn->minor = reply.minor; |
d3e2ba59 | 754 | } else { |
58eb9381 | 755 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
756 | } |
757 | ||
c4e361a4 | 758 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 759 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 760 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 761 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
762 | } else { |
763 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
764 | ret = -1; | |
765 | goto end; | |
766 | } | |
767 | ||
768 | reply.major = htobe32(reply.major); | |
769 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 770 | if (conn->type == RELAY_VIEWER_COMMAND) { |
19eba299 | 771 | /* |
9a78c92e MD |
772 | * Increment outside of htobe64 macro, because the argument can |
773 | * be used more than once within the macro, and thus the | |
774 | * operation may be undefined. | |
19eba299 | 775 | */ |
9a78c92e | 776 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
19eba299 | 777 | last_relay_viewer_session_id++; |
9a78c92e | 778 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
19eba299 | 779 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 780 | } |
eea7556c MD |
781 | |
782 | health_code_update(); | |
783 | ||
58eb9381 | 784 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 785 | if (ret < 0) { |
2f8f53af | 786 | goto end; |
d3e2ba59 JD |
787 | } |
788 | ||
eea7556c MD |
789 | health_code_update(); |
790 | ||
58eb9381 | 791 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
792 | ret = 0; |
793 | ||
794 | end: | |
795 | return ret; | |
796 | } | |
797 | ||
798 | /* | |
799 | * Send the viewer the list of current sessions. | |
9a78c92e MD |
800 | * We need to create a copy of the hash table content because otherwise |
801 | * we cannot assume the number of entries stays the same between getting | |
802 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
803 | * |
804 | * Return 0 on success or else a negative value. | |
805 | */ | |
806 | static | |
58eb9381 | 807 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 JD |
808 | { |
809 | int ret; | |
810 | struct lttng_viewer_list_sessions session_list; | |
d3e2ba59 | 811 | struct lttng_ht_iter iter; |
d3e2ba59 | 812 | struct relay_session *session; |
9a78c92e MD |
813 | struct lttng_viewer_session *send_session_buf = NULL; |
814 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
815 | uint32_t count = 0; | |
d3e2ba59 JD |
816 | |
817 | DBG("List sessions received"); | |
818 | ||
9a78c92e MD |
819 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
820 | if (!send_session_buf) { | |
821 | return -1; | |
d3e2ba59 JD |
822 | } |
823 | ||
9a78c92e MD |
824 | rcu_read_lock(); |
825 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 826 | session_n.node) { |
9a78c92e | 827 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 828 | |
eea7556c MD |
829 | health_code_update(); |
830 | ||
9a78c92e MD |
831 | if (count >= buf_count) { |
832 | struct lttng_viewer_session *newbuf; | |
833 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 834 | |
9a78c92e MD |
835 | newbuf = realloc(send_session_buf, |
836 | new_buf_count * sizeof(*send_session_buf)); | |
837 | if (!newbuf) { | |
838 | ret = -1; | |
839 | rcu_read_unlock(); | |
840 | goto end_free; | |
841 | } | |
842 | send_session_buf = newbuf; | |
843 | buf_count = new_buf_count; | |
6763619c | 844 | } |
9a78c92e | 845 | send_session = &send_session_buf[count]; |
7395f8e1 MD |
846 | if (lttng_strncpy(send_session->session_name, |
847 | session->session_name, | |
848 | sizeof(send_session->session_name))) { | |
849 | ret = -1; | |
850 | rcu_read_unlock(); | |
851 | goto end_free; | |
852 | } | |
853 | if (lttng_strncpy(send_session->hostname, session->hostname, | |
854 | sizeof(send_session->hostname))) { | |
855 | ret = -1; | |
856 | rcu_read_unlock(); | |
857 | goto end_free; | |
858 | } | |
9a78c92e MD |
859 | send_session->id = htobe64(session->id); |
860 | send_session->live_timer = htobe32(session->live_timer); | |
861 | if (session->viewer_attached) { | |
862 | send_session->clients = htobe32(1); | |
863 | } else { | |
864 | send_session->clients = htobe32(0); | |
d227d5bd | 865 | } |
9a78c92e MD |
866 | send_session->streams = htobe32(session->stream_count); |
867 | count++; | |
868 | } | |
869 | rcu_read_unlock(); | |
d227d5bd | 870 | |
9a78c92e | 871 | session_list.sessions_count = htobe32(count); |
d227d5bd | 872 | |
9a78c92e | 873 | health_code_update(); |
d227d5bd | 874 | |
9a78c92e MD |
875 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
876 | if (ret < 0) { | |
877 | goto end_free; | |
d227d5bd | 878 | } |
d227d5bd | 879 | |
9a78c92e | 880 | health_code_update(); |
d227d5bd | 881 | |
9a78c92e MD |
882 | ret = send_response(conn->sock, send_session_buf, |
883 | count * sizeof(*send_session_buf)); | |
884 | if (ret < 0) { | |
885 | goto end_free; | |
d227d5bd | 886 | } |
9a78c92e | 887 | health_code_update(); |
d227d5bd | 888 | |
9a78c92e MD |
889 | ret = 0; |
890 | end_free: | |
891 | free(send_session_buf); | |
892 | return ret; | |
d227d5bd JD |
893 | } |
894 | ||
80e8027a | 895 | /* |
9a78c92e | 896 | * Send the viewer the list of current streams. |
80e8027a JD |
897 | */ |
898 | static | |
58eb9381 | 899 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
900 | { |
901 | int ret, send_streams = 0; | |
9a78c92e | 902 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
903 | struct lttng_viewer_new_streams_request request; |
904 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 905 | struct relay_session *session; |
6763619c | 906 | uint64_t session_id; |
11436961 | 907 | bool closed = false; |
80e8027a | 908 | |
58eb9381 | 909 | assert(conn); |
80e8027a JD |
910 | |
911 | DBG("Get new streams received"); | |
912 | ||
80e8027a JD |
913 | health_code_update(); |
914 | ||
2f8f53af | 915 | /* Receive the request from the connected client. */ |
58eb9381 | 916 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 917 | if (ret < 0) { |
80e8027a JD |
918 | goto error; |
919 | } | |
6763619c | 920 | session_id = be64toh(request.session_id); |
80e8027a JD |
921 | |
922 | health_code_update(); | |
923 | ||
53efb85a MD |
924 | memset(&response, 0, sizeof(response)); |
925 | ||
9a78c92e | 926 | session = session_get_by_id(session_id); |
2f8f53af | 927 | if (!session) { |
6763619c | 928 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 929 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
930 | goto send_reply; |
931 | } | |
932 | ||
9a78c92e | 933 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
80e8027a | 934 | send_streams = 0; |
c4e361a4 | 935 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
936 | goto send_reply; |
937 | } | |
938 | ||
6763619c JD |
939 | send_streams = 1; |
940 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
941 | ||
9a78c92e | 942 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
11436961 | 943 | &nb_created, &closed); |
2f8f53af | 944 | if (ret < 0) { |
9a78c92e | 945 | goto end_put_session; |
2f8f53af DG |
946 | } |
947 | /* Only send back the newly created streams with the unsent ones. */ | |
948 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
949 | response.streams_count = htobe32(nb_streams); |
950 | ||
4479f682 | 951 | /* |
64bda0b4 MD |
952 | * If the session is closed, HUP when there are no more streams |
953 | * with data. | |
4479f682 | 954 | */ |
11436961 | 955 | if (closed && nb_total == 0) { |
4479f682 | 956 | send_streams = 0; |
11436961 | 957 | response.streams_count = 0; |
4479f682 JD |
958 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
959 | goto send_reply; | |
960 | } | |
961 | ||
80e8027a JD |
962 | send_reply: |
963 | health_code_update(); | |
58eb9381 | 964 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 965 | if (ret < 0) { |
9a78c92e | 966 | goto end_put_session; |
80e8027a JD |
967 | } |
968 | health_code_update(); | |
969 | ||
970 | /* | |
9a78c92e MD |
971 | * Unknown or empty session, just return gracefully, the viewer |
972 | * knows what is happening. | |
80e8027a JD |
973 | */ |
974 | if (!send_streams || !nb_streams) { | |
975 | ret = 0; | |
9a78c92e | 976 | goto end_put_session; |
80e8027a JD |
977 | } |
978 | ||
2f8f53af | 979 | /* |
9a78c92e MD |
980 | * Send stream and *DON'T* ignore the sent flag so every viewer |
981 | * streams that were not sent from that point will be sent to | |
982 | * the viewer. | |
2f8f53af | 983 | */ |
58eb9381 | 984 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af | 985 | if (ret < 0) { |
9a78c92e | 986 | goto end_put_session; |
80e8027a JD |
987 | } |
988 | ||
9a78c92e MD |
989 | end_put_session: |
990 | if (session) { | |
991 | session_put(session); | |
992 | } | |
80e8027a JD |
993 | error: |
994 | return ret; | |
995 | } | |
996 | ||
d3e2ba59 JD |
997 | /* |
998 | * Send the viewer the list of current sessions. | |
999 | */ | |
1000 | static | |
58eb9381 | 1001 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 1002 | { |
2f8f53af DG |
1003 | int send_streams = 0; |
1004 | ssize_t ret; | |
80e8027a | 1005 | uint32_t nb_streams = 0; |
2f8f53af | 1006 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
1007 | struct lttng_viewer_attach_session_request request; |
1008 | struct lttng_viewer_attach_session_response response; | |
9a78c92e | 1009 | struct relay_session *session = NULL; |
11436961 | 1010 | bool closed = false; |
d3e2ba59 | 1011 | |
58eb9381 | 1012 | assert(conn); |
d3e2ba59 | 1013 | |
eea7556c MD |
1014 | health_code_update(); |
1015 | ||
2f8f53af | 1016 | /* Receive the request from the connected client. */ |
58eb9381 | 1017 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1018 | if (ret < 0) { |
d3e2ba59 JD |
1019 | goto error; |
1020 | } | |
1021 | ||
eea7556c MD |
1022 | health_code_update(); |
1023 | ||
53efb85a MD |
1024 | memset(&response, 0, sizeof(response)); |
1025 | ||
c3b7390b JD |
1026 | if (!conn->viewer_session) { |
1027 | DBG("Client trying to attach before creating a live viewer session"); | |
1028 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1029 | goto send_reply; | |
1030 | } | |
1031 | ||
9a78c92e | 1032 | session = session_get_by_id(be64toh(request.session_id)); |
2f8f53af | 1033 | if (!session) { |
d3e2ba59 JD |
1034 | DBG("Relay session %" PRIu64 " not found", |
1035 | be64toh(request.session_id)); | |
c4e361a4 | 1036 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1037 | goto send_reply; |
1038 | } | |
9a78c92e MD |
1039 | DBG("Attach session ID %" PRIu64 " received", |
1040 | be64toh(request.session_id)); | |
d3e2ba59 | 1041 | |
9a78c92e | 1042 | if (session->live_timer == 0) { |
d3e2ba59 | 1043 | DBG("Not live session"); |
c4e361a4 | 1044 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1045 | goto send_reply; |
9a78c92e MD |
1046 | } |
1047 | ||
1048 | send_streams = 1; | |
1049 | ret = viewer_session_attach(conn->viewer_session, session); | |
1050 | if (ret) { | |
1051 | DBG("Already a viewer attached"); | |
1052 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); | |
1053 | goto send_reply; | |
d3e2ba59 JD |
1054 | } |
1055 | ||
1056 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1057 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1058 | case LTTNG_VIEWER_SEEK_LAST: | |
9a78c92e | 1059 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1060 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1061 | break; |
1062 | default: | |
1063 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1064 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1065 | send_streams = 0; |
1066 | goto send_reply; | |
1067 | } | |
1068 | ||
11436961 MD |
1069 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, |
1070 | NULL, &closed); | |
2f8f53af | 1071 | if (ret < 0) { |
9a78c92e | 1072 | goto end_put_session; |
d3e2ba59 | 1073 | } |
2f8f53af | 1074 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 | 1075 | |
11436961 MD |
1076 | /* |
1077 | * If the session is closed when the viewer is attaching, it | |
1078 | * means some of the streams may have been concurrently removed, | |
1079 | * so we don't allow the viewer to attach, even if there are | |
1080 | * streams available. | |
1081 | */ | |
1082 | if (closed) { | |
1083 | send_streams = 0; | |
1084 | response.streams_count = 0; | |
1085 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
1086 | goto send_reply; | |
1087 | } | |
1088 | ||
d3e2ba59 | 1089 | send_reply: |
eea7556c | 1090 | health_code_update(); |
58eb9381 | 1091 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1092 | if (ret < 0) { |
9a78c92e | 1093 | goto end_put_session; |
d3e2ba59 | 1094 | } |
eea7556c | 1095 | health_code_update(); |
d3e2ba59 JD |
1096 | |
1097 | /* | |
9a78c92e MD |
1098 | * Unknown or empty session, just return gracefully, the viewer |
1099 | * knows what is happening. | |
d3e2ba59 | 1100 | */ |
157df586 | 1101 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1102 | ret = 0; |
9a78c92e | 1103 | goto end_put_session; |
d3e2ba59 JD |
1104 | } |
1105 | ||
2f8f53af | 1106 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1107 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af | 1108 | if (ret < 0) { |
9a78c92e | 1109 | goto end_put_session; |
d3e2ba59 | 1110 | } |
d3e2ba59 | 1111 | |
9a78c92e MD |
1112 | end_put_session: |
1113 | if (session) { | |
1114 | session_put(session); | |
1115 | } | |
4a9daf17 JD |
1116 | error: |
1117 | return ret; | |
1118 | } | |
1119 | ||
878c34cf DG |
1120 | /* |
1121 | * Open the index file if needed for the given vstream. | |
1122 | * | |
9a78c92e MD |
1123 | * If an index file is successfully opened, the vstream index_fd set with |
1124 | * it. | |
878c34cf DG |
1125 | * |
1126 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
9a78c92e MD |
1127 | * |
1128 | * Called with rstream lock held. | |
878c34cf DG |
1129 | */ |
1130 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1131 | struct relay_stream *rstream) | |
1132 | { | |
1133 | int ret = 0; | |
1134 | ||
9a78c92e | 1135 | if (vstream->index_fd) { |
878c34cf DG |
1136 | goto end; |
1137 | } | |
1138 | ||
1139 | /* | |
9a78c92e | 1140 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1141 | */ |
c00978f1 | 1142 | if (rstream->index_received_seqcount == 0) { |
878c34cf DG |
1143 | ret = -ENOENT; |
1144 | goto end; | |
1145 | } | |
1146 | ret = index_open(vstream->path_name, vstream->channel_name, | |
9a78c92e MD |
1147 | vstream->stream->tracefile_count, |
1148 | vstream->current_tracefile_id); | |
878c34cf | 1149 | if (ret >= 0) { |
9a78c92e MD |
1150 | vstream->index_fd = stream_fd_create(ret); |
1151 | if (!vstream->index_fd) { | |
1152 | if (close(ret)) { | |
1153 | PERROR("close"); | |
1154 | } | |
1155 | ret = -1; | |
1156 | } else { | |
1157 | ret = 0; | |
1158 | } | |
878c34cf DG |
1159 | goto end; |
1160 | } | |
1161 | ||
1162 | end: | |
1163 | return ret; | |
1164 | } | |
1165 | ||
1166 | /* | |
9a78c92e MD |
1167 | * Check the status of the index for the given stream. This function |
1168 | * updates the index structure if needed and can put (close) the vstream | |
1169 | * in the HUP situation. | |
1170 | * | |
1171 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1172 | * that the index has been updated and is ready to be sent to the | |
1173 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1174 | * |
9a78c92e | 1175 | * Called with rstream lock held. |
878c34cf DG |
1176 | */ |
1177 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1178 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1179 | struct lttng_viewer_index *index) | |
1180 | { | |
1181 | int ret; | |
1182 | ||
9a78c92e | 1183 | if (trace->session->connection_closed |
c00978f1 MD |
1184 | && rstream->index_received_seqcount |
1185 | == vstream->index_sent_seqcount) { | |
9a78c92e MD |
1186 | /* Last index sent and session connection is closed. */ |
1187 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1188 | goto hup; | |
1189 | } else if (rstream->beacon_ts_end != -1ULL && | |
c00978f1 MD |
1190 | rstream->index_received_seqcount |
1191 | == vstream->index_sent_seqcount) { | |
9a78c92e MD |
1192 | /* |
1193 | * We've received a synchronization beacon and the last index | |
1194 | * available has been sent, the index for now is inactive. | |
1195 | * | |
1196 | * In this case, we have received a beacon which allows us to | |
1197 | * inform the client of a time interval during which we can | |
1198 | * guarantee that there are no events to read (and never will | |
1199 | * be). | |
1200 | */ | |
1201 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1202 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1203 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
1204 | goto index_ready; | |
c00978f1 MD |
1205 | } else if (rstream->index_received_seqcount |
1206 | == vstream->index_sent_seqcount) { | |
9a78c92e | 1207 | /* |
c00978f1 MD |
1208 | * This checks whether received == sent seqcount. In |
1209 | * this case, we have not received a beacon. Therefore, | |
1210 | * we can only ask the client to retry later. | |
9a78c92e MD |
1211 | */ |
1212 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1213 | goto index_ready; | |
c00978f1 MD |
1214 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
1215 | vstream->current_tracefile_id, | |
1216 | vstream->index_sent_seqcount)) { | |
9a78c92e | 1217 | /* |
c00978f1 MD |
1218 | * The next index we want to send cannot be read either |
1219 | * because we need to perform a rotation, or due to | |
1220 | * the producer having overwritten its trace file. | |
9a78c92e | 1221 | */ |
c00978f1 | 1222 | DBG("Viewer stream %" PRIu64 " rotation", |
9a78c92e MD |
1223 | vstream->stream->stream_handle); |
1224 | ret = viewer_stream_rotate(vstream); | |
1225 | if (ret < 0) { | |
1226 | goto end; | |
1227 | } else if (ret == 1) { | |
1228 | /* EOF across entire stream. */ | |
1229 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1230 | goto hup; | |
1231 | } | |
9a78c92e | 1232 | /* |
c00978f1 MD |
1233 | * If we have been pushed due to overwrite, it |
1234 | * necessarily means there is data that can be read in | |
1235 | * the stream. If we rotated because we reached the end | |
1236 | * of a tracefile, it means the following tracefile | |
1237 | * needs to contain at least one index, else we would | |
1238 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1239 | * viewer. The updated index_sent_seqcount needs to | |
1240 | * point to a readable index entry now. | |
1241 | * | |
1242 | * In the case where we "rotate" on a single file, we | |
1243 | * can end up in a case where the requested index is | |
1244 | * still unavailable. | |
9a78c92e | 1245 | */ |
c00978f1 MD |
1246 | if (rstream->tracefile_count == 1 && |
1247 | !tracefile_array_seq_in_file( | |
1248 | rstream->tfa, | |
1249 | vstream->current_tracefile_id, | |
1250 | vstream->index_sent_seqcount)) { | |
1251 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1252 | goto index_ready; | |
878c34cf | 1253 | } |
c00978f1 MD |
1254 | assert(tracefile_array_seq_in_file(rstream->tfa, |
1255 | vstream->current_tracefile_id, | |
1256 | vstream->index_sent_seqcount)); | |
878c34cf | 1257 | } |
c00978f1 MD |
1258 | /* ret == 0 means successful so we continue. */ |
1259 | ret = 0; | |
9a78c92e | 1260 | end: |
878c34cf DG |
1261 | return ret; |
1262 | ||
1263 | hup: | |
9a78c92e | 1264 | viewer_stream_put(vstream); |
878c34cf DG |
1265 | index_ready: |
1266 | return 1; | |
1267 | } | |
1268 | ||
d3e2ba59 JD |
1269 | /* |
1270 | * Send the next index for a stream. | |
1271 | * | |
1272 | * Return 0 on success or else a negative value. | |
1273 | */ | |
1274 | static | |
58eb9381 | 1275 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1276 | { |
1277 | int ret; | |
878c34cf | 1278 | ssize_t read_ret; |
d3e2ba59 JD |
1279 | struct lttng_viewer_get_next_index request_index; |
1280 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1281 | struct ctf_packet_index packet_index; |
9a78c92e MD |
1282 | struct relay_viewer_stream *vstream = NULL; |
1283 | struct relay_stream *rstream = NULL; | |
1284 | struct ctf_trace *ctf_trace = NULL; | |
1285 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1286 | |
58eb9381 | 1287 | assert(conn); |
d3e2ba59 JD |
1288 | |
1289 | DBG("Viewer get next index"); | |
1290 | ||
9a78c92e | 1291 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1292 | health_code_update(); |
2f8f53af | 1293 | |
58eb9381 | 1294 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1295 | if (ret < 0) { |
d3e2ba59 JD |
1296 | goto end; |
1297 | } | |
eea7556c | 1298 | health_code_update(); |
d3e2ba59 | 1299 | |
9a78c92e | 1300 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1301 | if (!vstream) { |
c00978f1 MD |
1302 | DBG("Client requested index of unknown stream id %" PRIu64, |
1303 | be64toh(request_index.stream_id)); | |
387137a7 MD |
1304 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1305 | goto send_reply; | |
2a174661 DG |
1306 | } |
1307 | ||
9a78c92e MD |
1308 | /* Use back. ref. Protected by refcounts. */ |
1309 | rstream = vstream->stream; | |
1310 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1311 | |
9a78c92e MD |
1312 | /* metadata_viewer_stream may be NULL. */ |
1313 | metadata_viewer_stream = | |
1314 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1315 | |
9a78c92e | 1316 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1317 | |
1318 | /* | |
1319 | * The viewer should not ask for index on metadata stream. | |
1320 | */ | |
9a78c92e | 1321 | if (rstream->is_metadata) { |
c4e361a4 | 1322 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1323 | goto send_reply; |
1324 | } | |
1325 | ||
878c34cf DG |
1326 | /* Try to open an index if one is needed for that stream. */ |
1327 | ret = try_open_index(vstream, rstream); | |
1328 | if (ret < 0) { | |
0e6830aa | 1329 | if (ret == -ENOENT) { |
d3e2ba59 | 1330 | /* |
9a78c92e MD |
1331 | * The index is created only when the first data |
1332 | * packet arrives, it might not be ready at the | |
1333 | * beginning of the session | |
d3e2ba59 | 1334 | */ |
c4e361a4 | 1335 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1336 | } else { |
1337 | /* Unhandled error. */ | |
c4e361a4 | 1338 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1339 | } |
878c34cf | 1340 | goto send_reply; |
d3e2ba59 JD |
1341 | } |
1342 | ||
878c34cf | 1343 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1344 | if (ret < 0) { |
9a78c92e | 1345 | goto error_put; |
878c34cf DG |
1346 | } else if (ret == 1) { |
1347 | /* | |
9a78c92e MD |
1348 | * We have no index to send and check_index_status has populated |
1349 | * viewer_index's status. | |
878c34cf | 1350 | */ |
d3e2ba59 JD |
1351 | goto send_reply; |
1352 | } | |
9a78c92e | 1353 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1354 | assert(!ret); |
d3e2ba59 | 1355 | |
9a78c92e MD |
1356 | /* |
1357 | * vstream->stream_fd may be NULL if it has been closed by | |
1358 | * tracefile rotation, or if we are at the beginning of the | |
1359 | * stream. We open the data stream file here to protect against | |
1360 | * overwrite caused by tracefile rotation (in association with | |
1361 | * unlink performed before overwrite). | |
1362 | */ | |
1363 | if (!vstream->stream_fd) { | |
1364 | char fullpath[PATH_MAX]; | |
1365 | ||
1366 | if (vstream->stream->tracefile_count > 0) { | |
1367 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, | |
1368 | vstream->path_name, | |
1369 | vstream->channel_name, | |
1370 | vstream->current_tracefile_id); | |
1371 | } else { | |
1372 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", | |
1373 | vstream->path_name, | |
1374 | vstream->channel_name); | |
1375 | } | |
1376 | if (ret < 0) { | |
1377 | goto error_put; | |
1378 | } | |
1379 | ret = open(fullpath, O_RDONLY); | |
1380 | if (ret < 0) { | |
1381 | PERROR("Relay opening trace file"); | |
1382 | goto error_put; | |
1383 | } | |
1384 | vstream->stream_fd = stream_fd_create(ret); | |
1385 | if (!vstream->stream_fd) { | |
1386 | if (close(ret)) { | |
1387 | PERROR("close"); | |
1388 | } | |
1389 | goto error_put; | |
1390 | } | |
d3e2ba59 JD |
1391 | } |
1392 | ||
f04a971b | 1393 | ret = check_new_streams(conn); |
4a9daf17 | 1394 | if (ret < 0) { |
9a78c92e MD |
1395 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1396 | goto send_reply; | |
4a9daf17 JD |
1397 | } else if (ret == 1) { |
1398 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1399 | } | |
1400 | ||
9a78c92e | 1401 | read_ret = lttng_read(vstream->index_fd->fd, &packet_index, |
6cd525e8 | 1402 | sizeof(packet_index)); |
9a78c92e MD |
1403 | if (read_ret < sizeof(packet_index)) { |
1404 | ERR("Relay reading index file %d returned %zd", | |
1405 | vstream->index_fd->fd, read_ret); | |
1406 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
6b6b9a5a | 1407 | goto send_reply; |
d3e2ba59 | 1408 | } else { |
c4e361a4 | 1409 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
c00978f1 | 1410 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1411 | } |
1412 | ||
1413 | /* | |
1414 | * Indexes are stored in big endian, no need to switch before sending. | |
1415 | */ | |
9a78c92e MD |
1416 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1417 | rstream->stream_handle, | |
1418 | be64toh(packet_index.offset)); | |
d3e2ba59 JD |
1419 | viewer_index.offset = packet_index.offset; |
1420 | viewer_index.packet_size = packet_index.packet_size; | |
1421 | viewer_index.content_size = packet_index.content_size; | |
1422 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1423 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1424 | viewer_index.events_discarded = packet_index.events_discarded; | |
1425 | viewer_index.stream_id = packet_index.stream_id; | |
1426 | ||
1427 | send_reply: | |
387137a7 MD |
1428 | if (rstream) { |
1429 | pthread_mutex_unlock(&rstream->lock); | |
1430 | } | |
9a78c92e MD |
1431 | |
1432 | if (metadata_viewer_stream) { | |
1433 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1434 | DBG("get next index metadata check: recv %" PRIu64 | |
1435 | " sent %" PRIu64, | |
1436 | metadata_viewer_stream->stream->metadata_received, | |
1437 | metadata_viewer_stream->metadata_sent); | |
1438 | if (!metadata_viewer_stream->stream->metadata_received || | |
1439 | metadata_viewer_stream->stream->metadata_received > | |
1440 | metadata_viewer_stream->metadata_sent) { | |
1441 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1442 | } | |
1443 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1444 | } | |
1445 | ||
d3e2ba59 | 1446 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1447 | health_code_update(); |
2f8f53af | 1448 | |
58eb9381 | 1449 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1450 | if (ret < 0) { |
9a78c92e | 1451 | goto end; |
d3e2ba59 | 1452 | } |
eea7556c | 1453 | health_code_update(); |
d3e2ba59 | 1454 | |
16fa7c98 MD |
1455 | if (vstream) { |
1456 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
c00978f1 | 1457 | vstream->index_sent_seqcount, |
16fa7c98 MD |
1458 | vstream->stream->stream_handle); |
1459 | } | |
d3e2ba59 | 1460 | end: |
9a78c92e MD |
1461 | if (metadata_viewer_stream) { |
1462 | viewer_stream_put(metadata_viewer_stream); | |
1463 | } | |
1464 | if (vstream) { | |
1465 | viewer_stream_put(vstream); | |
1466 | } | |
1467 | return ret; | |
1468 | ||
1469 | error_put: | |
1470 | pthread_mutex_unlock(&rstream->lock); | |
1471 | if (metadata_viewer_stream) { | |
1472 | viewer_stream_put(metadata_viewer_stream); | |
1473 | } | |
1474 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1475 | return ret; |
1476 | } | |
1477 | ||
1478 | /* | |
1479 | * Send the next index for a stream | |
1480 | * | |
1481 | * Return 0 on success or else a negative value. | |
1482 | */ | |
1483 | static | |
58eb9381 | 1484 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 JD |
1485 | { |
1486 | int ret, send_data = 0; | |
1487 | char *data = NULL; | |
1488 | uint32_t len = 0; | |
1489 | ssize_t read_len; | |
1490 | struct lttng_viewer_get_packet get_packet_info; | |
1491 | struct lttng_viewer_trace_packet reply; | |
9a78c92e | 1492 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 JD |
1493 | |
1494 | DBG2("Relay get data packet"); | |
1495 | ||
eea7556c | 1496 | health_code_update(); |
2f8f53af | 1497 | |
9a78c92e MD |
1498 | ret = recv_request(conn->sock, &get_packet_info, |
1499 | sizeof(get_packet_info)); | |
2f8f53af | 1500 | if (ret < 0) { |
d3e2ba59 JD |
1501 | goto end; |
1502 | } | |
eea7556c | 1503 | health_code_update(); |
d3e2ba59 | 1504 | |
0233a6a5 DG |
1505 | /* From this point on, the error label can be reached. */ |
1506 | memset(&reply, 0, sizeof(reply)); | |
1507 | ||
9a78c92e MD |
1508 | vstream = viewer_stream_get_by_id(be64toh(get_packet_info.stream_id)); |
1509 | if (!vstream) { | |
c00978f1 MD |
1510 | DBG("Client requested packet of unknown stream id %" PRIu64, |
1511 | be64toh(get_packet_info.stream_id)); | |
4da923bd MD |
1512 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1513 | goto send_reply_nolock; | |
d3e2ba59 | 1514 | } |
2a174661 | 1515 | |
9a78c92e | 1516 | pthread_mutex_lock(&vstream->stream->lock); |
4a9daf17 | 1517 | |
d3e2ba59 JD |
1518 | len = be32toh(get_packet_info.len); |
1519 | data = zmalloc(len); | |
1520 | if (!data) { | |
1521 | PERROR("relay data zmalloc"); | |
1522 | goto error; | |
1523 | } | |
1524 | ||
9a78c92e MD |
1525 | ret = lseek(vstream->stream_fd->fd, be64toh(get_packet_info.offset), |
1526 | SEEK_SET); | |
d3e2ba59 | 1527 | if (ret < 0) { |
9a78c92e MD |
1528 | PERROR("lseek fd %d to offset %" PRIu64, vstream->stream_fd->fd, |
1529 | be64toh(get_packet_info.offset)); | |
1530 | goto error; | |
d3e2ba59 | 1531 | } |
9a78c92e | 1532 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1533 | if (read_len < len) { |
9a78c92e MD |
1534 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, |
1535 | vstream->stream_fd->fd, | |
1536 | be64toh(get_packet_info.offset)); | |
1537 | goto error; | |
d3e2ba59 | 1538 | } |
c4e361a4 | 1539 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
d3e2ba59 JD |
1540 | reply.len = htobe32(len); |
1541 | send_data = 1; | |
1542 | goto send_reply; | |
1543 | ||
1544 | error: | |
c4e361a4 | 1545 | reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1546 | |
1547 | send_reply: | |
9a78c92e MD |
1548 | if (vstream) { |
1549 | pthread_mutex_unlock(&vstream->stream->lock); | |
1550 | } | |
1551 | send_reply_nolock: | |
d3e2ba59 | 1552 | reply.flags = htobe32(reply.flags); |
eea7556c MD |
1553 | |
1554 | health_code_update(); | |
2f8f53af | 1555 | |
58eb9381 | 1556 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1557 | if (ret < 0) { |
9a78c92e | 1558 | goto end_free; |
d3e2ba59 | 1559 | } |
eea7556c | 1560 | health_code_update(); |
d3e2ba59 JD |
1561 | |
1562 | if (send_data) { | |
eea7556c | 1563 | health_code_update(); |
58eb9381 | 1564 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1565 | if (ret < 0) { |
9a78c92e | 1566 | goto end_free; |
d3e2ba59 | 1567 | } |
eea7556c | 1568 | health_code_update(); |
d3e2ba59 JD |
1569 | } |
1570 | ||
1571 | DBG("Sent %u bytes for stream %" PRIu64, len, | |
1572 | be64toh(get_packet_info.stream_id)); | |
1573 | ||
9a78c92e | 1574 | end_free: |
d3e2ba59 | 1575 | free(data); |
d3e2ba59 | 1576 | end: |
9a78c92e MD |
1577 | if (vstream) { |
1578 | viewer_stream_put(vstream); | |
1579 | } | |
d3e2ba59 JD |
1580 | return ret; |
1581 | } | |
1582 | ||
1583 | /* | |
1584 | * Send the session's metadata | |
1585 | * | |
1586 | * Return 0 on success else a negative value. | |
1587 | */ | |
1588 | static | |
58eb9381 | 1589 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1590 | { |
1591 | int ret = 0; | |
1592 | ssize_t read_len; | |
1593 | uint64_t len = 0; | |
1594 | char *data = NULL; | |
1595 | struct lttng_viewer_get_metadata request; | |
1596 | struct lttng_viewer_metadata_packet reply; | |
9a78c92e | 1597 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1598 | |
58eb9381 | 1599 | assert(conn); |
d3e2ba59 JD |
1600 | |
1601 | DBG("Relay get metadata"); | |
1602 | ||
eea7556c | 1603 | health_code_update(); |
2f8f53af | 1604 | |
58eb9381 | 1605 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1606 | if (ret < 0) { |
d3e2ba59 JD |
1607 | goto end; |
1608 | } | |
eea7556c | 1609 | health_code_update(); |
d3e2ba59 | 1610 | |
53efb85a MD |
1611 | memset(&reply, 0, sizeof(reply)); |
1612 | ||
9a78c92e MD |
1613 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1614 | if (!vstream) { | |
3271c155 MD |
1615 | /* |
1616 | * The metadata stream can be closed by a CLOSE command | |
1617 | * just before we attach. It can also be closed by | |
1618 | * per-pid tracing during tracing. Therefore, it is | |
1619 | * possible that we cannot find this viewer stream. | |
1620 | * Reply back to the client with an error if we cannot | |
1621 | * find it. | |
1622 | */ | |
c00978f1 MD |
1623 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
1624 | be64toh(request.stream_id)); | |
3271c155 | 1625 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
9a78c92e | 1626 | goto send_reply; |
d3e2ba59 | 1627 | } |
9a78c92e MD |
1628 | pthread_mutex_lock(&vstream->stream->lock); |
1629 | if (!vstream->stream->is_metadata) { | |
1630 | ERR("Invalid metadata stream"); | |
6763619c JD |
1631 | goto error; |
1632 | } | |
1633 | ||
9a78c92e | 1634 | assert(vstream->metadata_sent <= vstream->stream->metadata_received); |
2a174661 | 1635 | |
9a78c92e | 1636 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
d3e2ba59 | 1637 | if (len == 0) { |
c4e361a4 | 1638 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1639 | goto send_reply; |
1640 | } | |
1641 | ||
1642 | /* first time, we open the metadata file */ | |
9a78c92e | 1643 | if (!vstream->stream_fd) { |
d3e2ba59 JD |
1644 | char fullpath[PATH_MAX]; |
1645 | ||
9a78c92e MD |
1646 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", vstream->path_name, |
1647 | vstream->channel_name); | |
d3e2ba59 JD |
1648 | if (ret < 0) { |
1649 | goto error; | |
1650 | } | |
1651 | ret = open(fullpath, O_RDONLY); | |
1652 | if (ret < 0) { | |
1653 | PERROR("Relay opening metadata file"); | |
1654 | goto error; | |
1655 | } | |
9a78c92e MD |
1656 | vstream->stream_fd = stream_fd_create(ret); |
1657 | if (!vstream->stream_fd) { | |
1658 | if (close(ret)) { | |
1659 | PERROR("close"); | |
1660 | } | |
1661 | goto error; | |
1662 | } | |
d3e2ba59 JD |
1663 | } |
1664 | ||
1665 | reply.len = htobe64(len); | |
1666 | data = zmalloc(len); | |
1667 | if (!data) { | |
1668 | PERROR("viewer metadata zmalloc"); | |
1669 | goto error; | |
1670 | } | |
1671 | ||
9a78c92e | 1672 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1673 | if (read_len < len) { |
d3e2ba59 JD |
1674 | PERROR("Relay reading metadata file"); |
1675 | goto error; | |
1676 | } | |
9a78c92e MD |
1677 | vstream->metadata_sent += read_len; |
1678 | if (vstream->metadata_sent == vstream->stream->metadata_received | |
1679 | && vstream->stream->closed) { | |
1680 | /* Release ownership for the viewer metadata stream. */ | |
1681 | viewer_stream_put(vstream); | |
1682 | } | |
1683 | ||
c4e361a4 | 1684 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
9a78c92e | 1685 | |
d3e2ba59 JD |
1686 | goto send_reply; |
1687 | ||
1688 | error: | |
c4e361a4 | 1689 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1690 | |
1691 | send_reply: | |
eea7556c | 1692 | health_code_update(); |
9a78c92e MD |
1693 | if (vstream) { |
1694 | pthread_mutex_unlock(&vstream->stream->lock); | |
1695 | } | |
58eb9381 | 1696 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1697 | if (ret < 0) { |
9a78c92e | 1698 | goto end_free; |
d3e2ba59 | 1699 | } |
eea7556c | 1700 | health_code_update(); |
d3e2ba59 JD |
1701 | |
1702 | if (len > 0) { | |
58eb9381 | 1703 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1704 | if (ret < 0) { |
9a78c92e | 1705 | goto end_free; |
d3e2ba59 JD |
1706 | } |
1707 | } | |
1708 | ||
1709 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
1710 | be64toh(request.stream_id)); | |
1711 | ||
1712 | DBG("Metadata sent"); | |
1713 | ||
9a78c92e | 1714 | end_free: |
d3e2ba59 | 1715 | free(data); |
d3e2ba59 | 1716 | end: |
9a78c92e MD |
1717 | if (vstream) { |
1718 | viewer_stream_put(vstream); | |
1719 | } | |
d3e2ba59 JD |
1720 | return ret; |
1721 | } | |
1722 | ||
c3b7390b JD |
1723 | /* |
1724 | * Create a viewer session. | |
1725 | * | |
1726 | * Return 0 on success or else a negative value. | |
1727 | */ | |
1728 | static | |
1729 | int viewer_create_session(struct relay_connection *conn) | |
1730 | { | |
1731 | int ret; | |
1732 | struct lttng_viewer_create_session_response resp; | |
1733 | ||
1734 | DBG("Viewer create session received"); | |
1735 | ||
53efb85a | 1736 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1737 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
9a78c92e | 1738 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
1739 | if (!conn->viewer_session) { |
1740 | ERR("Allocation viewer session"); | |
1741 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1742 | goto send_reply; | |
1743 | } | |
c3b7390b JD |
1744 | |
1745 | send_reply: | |
1746 | health_code_update(); | |
1747 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1748 | if (ret < 0) { | |
1749 | goto end; | |
1750 | } | |
1751 | health_code_update(); | |
1752 | ret = 0; | |
1753 | ||
1754 | end: | |
1755 | return ret; | |
1756 | } | |
1757 | ||
1758 | ||
d3e2ba59 JD |
1759 | /* |
1760 | * live_relay_unknown_command: send -1 if received unknown command | |
1761 | */ | |
1762 | static | |
58eb9381 | 1763 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1764 | { |
1765 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1766 | |
53efb85a | 1767 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1768 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1769 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1770 | } |
1771 | ||
1772 | /* | |
1773 | * Process the commands received on the control socket | |
1774 | */ | |
1775 | static | |
1776 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1777 | struct relay_connection *conn) |
d3e2ba59 JD |
1778 | { |
1779 | int ret = 0; | |
2f8f53af DG |
1780 | uint32_t msg_value; |
1781 | ||
2f8f53af DG |
1782 | msg_value = be32toh(recv_hdr->cmd); |
1783 | ||
1784 | /* | |
1785 | * Make sure we've done the version check before any command other then a | |
1786 | * new client connection. | |
1787 | */ | |
c4e361a4 | 1788 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1789 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1790 | ret = -1; |
1791 | goto end; | |
1792 | } | |
d3e2ba59 | 1793 | |
2f8f53af | 1794 | switch (msg_value) { |
c4e361a4 | 1795 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1796 | ret = viewer_connect(conn); |
d3e2ba59 | 1797 | break; |
c4e361a4 | 1798 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1799 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1800 | break; |
c4e361a4 | 1801 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1802 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1803 | break; |
c4e361a4 | 1804 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1805 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1806 | break; |
c4e361a4 | 1807 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1808 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1809 | break; |
c4e361a4 | 1810 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1811 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1812 | break; |
c4e361a4 | 1813 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1814 | ret = viewer_get_new_streams(conn); |
80e8027a | 1815 | break; |
c3b7390b JD |
1816 | case LTTNG_VIEWER_CREATE_SESSION: |
1817 | ret = viewer_create_session(conn); | |
1818 | break; | |
d3e2ba59 | 1819 | default: |
9a78c92e MD |
1820 | ERR("Received unknown viewer command (%u)", |
1821 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 1822 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1823 | ret = -1; |
1824 | goto end; | |
1825 | } | |
1826 | ||
1827 | end: | |
1828 | return ret; | |
1829 | } | |
1830 | ||
1831 | static | |
58eb9381 | 1832 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1833 | { |
1834 | int ret; | |
1835 | ||
58eb9381 | 1836 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1837 | |
1838 | ret = close(pollfd); | |
1839 | if (ret < 0) { | |
1840 | ERR("Closing pollfd %d", pollfd); | |
1841 | } | |
1842 | } | |
1843 | ||
d3e2ba59 JD |
1844 | /* |
1845 | * This thread does the actual work | |
1846 | */ | |
1847 | static | |
1848 | void *thread_worker(void *data) | |
1849 | { | |
1850 | int ret, err = -1; | |
1851 | uint32_t nb_fd; | |
d3e2ba59 | 1852 | struct lttng_poll_event events; |
9a78c92e | 1853 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
1854 | struct lttng_ht_iter iter; |
1855 | struct lttng_viewer_cmd recv_hdr; | |
f89048c1 | 1856 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
1857 | |
1858 | DBG("[thread] Live viewer relay worker started"); | |
1859 | ||
1860 | rcu_register_thread(); | |
1861 | ||
eea7556c MD |
1862 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1863 | ||
9b5e0863 MD |
1864 | if (testpoint(relayd_thread_live_worker)) { |
1865 | goto error_testpoint; | |
1866 | } | |
1867 | ||
d3e2ba59 | 1868 | /* table of connections indexed on socket */ |
9a78c92e MD |
1869 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1870 | if (!viewer_connections_ht) { | |
1871 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
1872 | } |
1873 | ||
1874 | ret = create_thread_poll_set(&events, 2); | |
1875 | if (ret < 0) { | |
1876 | goto error_poll_create; | |
1877 | } | |
1878 | ||
58eb9381 | 1879 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1880 | if (ret < 0) { |
1881 | goto error; | |
1882 | } | |
1883 | ||
1884 | restart: | |
1885 | while (1) { | |
1886 | int i; | |
1887 | ||
eea7556c MD |
1888 | health_code_update(); |
1889 | ||
d3e2ba59 JD |
1890 | /* Infinite blocking call, waiting for transmission */ |
1891 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1892 | health_poll_entry(); |
d3e2ba59 | 1893 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1894 | health_poll_exit(); |
d3e2ba59 JD |
1895 | if (ret < 0) { |
1896 | /* | |
1897 | * Restart interrupted system call. | |
1898 | */ | |
1899 | if (errno == EINTR) { | |
1900 | goto restart; | |
1901 | } | |
1902 | goto error; | |
1903 | } | |
1904 | ||
1905 | nb_fd = ret; | |
1906 | ||
1907 | /* | |
1908 | * Process control. The control connection is prioritised so we don't | |
1909 | * starve it with high throughput tracing data on the data | |
1910 | * connection. | |
1911 | */ | |
1912 | for (i = 0; i < nb_fd; i++) { | |
1913 | /* Fetch once the poll data */ | |
1914 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1915 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1916 | ||
eea7556c MD |
1917 | health_code_update(); |
1918 | ||
e0077699 MD |
1919 | if (!revents) { |
1920 | /* No activity for this FD (poll implementation). */ | |
1921 | continue; | |
1922 | } | |
1923 | ||
d3e2ba59 | 1924 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 1925 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
1926 | if (ret) { |
1927 | err = 0; | |
1928 | goto exit; | |
1929 | } | |
1930 | ||
9a78c92e | 1931 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 1932 | if (pollfd == live_conn_pipe[0]) { |
584fc280 | 1933 | if (revents & LPOLLIN) { |
f89048c1 JG |
1934 | struct relay_connection *conn; |
1935 | ||
9a78c92e MD |
1936 | ret = lttng_read(live_conn_pipe[0], |
1937 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
1938 | if (ret < 0) { |
1939 | goto error; | |
1940 | } | |
58eb9381 DG |
1941 | lttng_poll_add(&events, conn->sock->fd, |
1942 | LPOLLIN | LPOLLRDHUP); | |
9a78c92e MD |
1943 | connection_ht_add(viewer_connections_ht, conn); |
1944 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
584fc280 MD |
1945 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1946 | ERR("Relay live pipe error"); | |
1947 | goto error; | |
1948 | } else { | |
1949 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1950 | goto error; | |
d3e2ba59 | 1951 | } |
58eb9381 | 1952 | } else { |
9a78c92e | 1953 | /* Connection activity. */ |
f89048c1 JG |
1954 | struct relay_connection *conn; |
1955 | ||
9a78c92e MD |
1956 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
1957 | if (!conn) { | |
1958 | continue; | |
1959 | } | |
58eb9381 | 1960 | |
584fc280 | 1961 | if (revents & LPOLLIN) { |
58eb9381 DG |
1962 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
1963 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 1964 | if (ret <= 0) { |
9a78c92e | 1965 | /* Connection closed. */ |
58eb9381 | 1966 | cleanup_connection_pollfd(&events, pollfd); |
9a78c92e MD |
1967 | /* Put "create" ownership reference. */ |
1968 | connection_put(conn); | |
58eb9381 | 1969 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 1970 | } else { |
58eb9381 | 1971 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
1972 | if (ret < 0) { |
1973 | /* Clear the session on error. */ | |
58eb9381 | 1974 | cleanup_connection_pollfd(&events, pollfd); |
9a78c92e MD |
1975 | /* Put "create" ownership reference. */ |
1976 | connection_put(conn); | |
d3e2ba59 JD |
1977 | DBG("Viewer connection closed with %d", pollfd); |
1978 | } | |
1979 | } | |
584fc280 MD |
1980 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1981 | cleanup_connection_pollfd(&events, pollfd); | |
1982 | /* Put "create" ownership reference. */ | |
1983 | connection_put(conn); | |
1984 | } else { | |
1985 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1986 | connection_put(conn); | |
1987 | goto error; | |
d3e2ba59 | 1988 | } |
9a78c92e MD |
1989 | /* Put local "get_by_sock" reference. */ |
1990 | connection_put(conn); | |
d3e2ba59 JD |
1991 | } |
1992 | } | |
1993 | } | |
1994 | ||
1995 | exit: | |
1996 | error: | |
1997 | lttng_poll_clean(&events); | |
1998 | ||
58eb9381 | 1999 | /* Cleanup reamaining connection object. */ |
d3e2ba59 | 2000 | rcu_read_lock(); |
9a78c92e | 2001 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
f89048c1 | 2002 | destroy_conn, |
58eb9381 | 2003 | sock_n.node) { |
eea7556c | 2004 | health_code_update(); |
9a78c92e | 2005 | connection_put(destroy_conn); |
d3e2ba59 JD |
2006 | } |
2007 | rcu_read_unlock(); | |
2008 | error_poll_create: | |
9a78c92e MD |
2009 | lttng_ht_destroy(viewer_connections_ht); |
2010 | viewer_connections_ht_error: | |
58eb9381 DG |
2011 | /* Close relay conn pipes */ |
2012 | utils_close_pipe(live_conn_pipe); | |
d3e2ba59 JD |
2013 | if (err) { |
2014 | DBG("Viewer worker thread exited with error"); | |
2015 | } | |
2016 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2017 | error_testpoint: |
eea7556c MD |
2018 | if (err) { |
2019 | health_error(); | |
2020 | ERR("Health error occurred in %s", __func__); | |
2021 | } | |
2022 | health_unregister(health_relayd); | |
770f96f4 MD |
2023 | if (lttng_relay_stop_threads()) { |
2024 | ERR("Error stopping threads"); | |
77c54fed | 2025 | } |
d3e2ba59 JD |
2026 | rcu_unregister_thread(); |
2027 | return NULL; | |
2028 | } | |
2029 | ||
2030 | /* | |
2031 | * Create the relay command pipe to wake thread_manage_apps. | |
2032 | * Closed in cleanup(). | |
2033 | */ | |
58eb9381 | 2034 | static int create_conn_pipe(void) |
d3e2ba59 | 2035 | { |
77c54fed MD |
2036 | return utils_create_pipe_cloexec(live_conn_pipe); |
2037 | } | |
d3e2ba59 | 2038 | |
77c54fed | 2039 | int relayd_live_join(void) |
d3e2ba59 | 2040 | { |
77c54fed | 2041 | int ret, retval = 0; |
d3e2ba59 JD |
2042 | void *status; |
2043 | ||
d3e2ba59 | 2044 | ret = pthread_join(live_listener_thread, &status); |
77c54fed MD |
2045 | if (ret) { |
2046 | errno = ret; | |
d3e2ba59 | 2047 | PERROR("pthread_join live listener"); |
77c54fed | 2048 | retval = -1; |
d3e2ba59 JD |
2049 | } |
2050 | ||
2051 | ret = pthread_join(live_worker_thread, &status); | |
77c54fed MD |
2052 | if (ret) { |
2053 | errno = ret; | |
d3e2ba59 | 2054 | PERROR("pthread_join live worker"); |
77c54fed | 2055 | retval = -1; |
d3e2ba59 JD |
2056 | } |
2057 | ||
2058 | ret = pthread_join(live_dispatcher_thread, &status); | |
77c54fed MD |
2059 | if (ret) { |
2060 | errno = ret; | |
d3e2ba59 | 2061 | PERROR("pthread_join live dispatcher"); |
77c54fed | 2062 | retval = -1; |
d3e2ba59 JD |
2063 | } |
2064 | ||
77c54fed | 2065 | cleanup_relayd_live(); |
d3e2ba59 | 2066 | |
77c54fed | 2067 | return retval; |
d3e2ba59 JD |
2068 | } |
2069 | ||
2070 | /* | |
2071 | * main | |
2072 | */ | |
9a78c92e | 2073 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2074 | { |
77c54fed | 2075 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2076 | void *status; |
2077 | int is_root; | |
2078 | ||
77c54fed MD |
2079 | if (!uri) { |
2080 | retval = -1; | |
2081 | goto exit_init_data; | |
2082 | } | |
d3e2ba59 JD |
2083 | live_uri = uri; |
2084 | ||
d3e2ba59 JD |
2085 | /* Check if daemon is UID = 0 */ |
2086 | is_root = !getuid(); | |
2087 | ||
2088 | if (!is_root) { | |
2089 | if (live_uri->port < 1024) { | |
2090 | ERR("Need to be root to use ports < 1024"); | |
77c54fed MD |
2091 | retval = -1; |
2092 | goto exit_init_data; | |
d3e2ba59 JD |
2093 | } |
2094 | } | |
2095 | ||
2096 | /* Setup the thread apps communication pipe. */ | |
77c54fed MD |
2097 | if (create_conn_pipe()) { |
2098 | retval = -1; | |
2099 | goto exit_init_data; | |
d3e2ba59 JD |
2100 | } |
2101 | ||
2102 | /* Init relay command queue. */ | |
8bdee6e2 | 2103 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2104 | |
2105 | /* Set up max poll set size */ | |
2106 | lttng_poll_set_max_size(); | |
2107 | ||
2108 | /* Setup the dispatcher thread */ | |
2109 | ret = pthread_create(&live_dispatcher_thread, NULL, | |
2110 | thread_dispatcher, (void *) NULL); | |
77c54fed MD |
2111 | if (ret) { |
2112 | errno = ret; | |
d3e2ba59 | 2113 | PERROR("pthread_create viewer dispatcher"); |
77c54fed MD |
2114 | retval = -1; |
2115 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2116 | } |
2117 | ||
2118 | /* Setup the worker thread */ | |
2119 | ret = pthread_create(&live_worker_thread, NULL, | |
9a78c92e | 2120 | thread_worker, NULL); |
77c54fed MD |
2121 | if (ret) { |
2122 | errno = ret; | |
d3e2ba59 | 2123 | PERROR("pthread_create viewer worker"); |
77c54fed MD |
2124 | retval = -1; |
2125 | goto exit_worker_thread; | |
d3e2ba59 JD |
2126 | } |
2127 | ||
2128 | /* Setup the listener thread */ | |
2129 | ret = pthread_create(&live_listener_thread, NULL, | |
2130 | thread_listener, (void *) NULL); | |
77c54fed MD |
2131 | if (ret) { |
2132 | errno = ret; | |
d3e2ba59 | 2133 | PERROR("pthread_create viewer listener"); |
77c54fed MD |
2134 | retval = -1; |
2135 | goto exit_listener_thread; | |
d3e2ba59 JD |
2136 | } |
2137 | ||
77c54fed MD |
2138 | /* |
2139 | * All OK, started all threads. | |
2140 | */ | |
2141 | return retval; | |
2142 | ||
bafd3fc0 JG |
2143 | /* |
2144 | * Join on the live_listener_thread should anything be added after | |
2145 | * the live_listener thread's creation. | |
2146 | */ | |
d3e2ba59 | 2147 | |
77c54fed | 2148 | exit_listener_thread: |
d3e2ba59 | 2149 | |
d3e2ba59 | 2150 | ret = pthread_join(live_worker_thread, &status); |
77c54fed MD |
2151 | if (ret) { |
2152 | errno = ret; | |
d3e2ba59 | 2153 | PERROR("pthread_join live worker"); |
77c54fed | 2154 | retval = -1; |
d3e2ba59 | 2155 | } |
77c54fed | 2156 | exit_worker_thread: |
d3e2ba59 | 2157 | |
d3e2ba59 | 2158 | ret = pthread_join(live_dispatcher_thread, &status); |
77c54fed MD |
2159 | if (ret) { |
2160 | errno = ret; | |
d3e2ba59 | 2161 | PERROR("pthread_join live dispatcher"); |
77c54fed | 2162 | retval = -1; |
d3e2ba59 | 2163 | } |
77c54fed | 2164 | exit_dispatcher_thread: |
d3e2ba59 | 2165 | |
77c54fed MD |
2166 | exit_init_data: |
2167 | cleanup_relayd_live(); | |
d3e2ba59 | 2168 | |
77c54fed | 2169 | return retval; |
d3e2ba59 | 2170 | } |