Commit | Line | Data |
---|---|---|
d3e2ba59 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
7591bab1 | 4 | * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
d3e2ba59 JD |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | */ | |
19 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
d3e2ba59 JD |
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> | |
7591bab1 | 39 | #include <urcu/rculist.h> |
d3e2ba59 JD |
40 | #include <unistd.h> |
41 | #include <fcntl.h> | |
d3e2ba59 JD |
42 | |
43 | #include <lttng/lttng.h> | |
44 | #include <common/common.h> | |
45 | #include <common/compat/poll.h> | |
46 | #include <common/compat/socket.h> | |
f263b7fd | 47 | #include <common/compat/endian.h> |
d3e2ba59 JD |
48 | #include <common/defaults.h> |
49 | #include <common/futex.h> | |
2f8f53af | 50 | #include <common/index/index.h> |
d3e2ba59 JD |
51 | #include <common/sessiond-comm/sessiond-comm.h> |
52 | #include <common/sessiond-comm/inet.h> | |
53 | #include <common/sessiond-comm/relayd.h> | |
54 | #include <common/uri.h> | |
55 | #include <common/utils.h> | |
e702232b | 56 | #include <common/fd-tracker/utils.h> |
d3e2ba59 JD |
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" |
7591bab1 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; | |
7591bab1 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 | |
178a0557 | 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 | } | |
7591bab1 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; | |
7591bab1 | 183 | session_put(session); |
f04a971b JD |
184 | if (ret == 1) { |
185 | goto end; | |
186 | } | |
2f8f53af | 187 | } |
f04a971b | 188 | end: |
7591bab1 | 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 | ||
7591bab1 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. */ |
7591bab1 | 222 | if (vstream->stream->trace->session->id != session->id || |
2f8f53af | 223 | (!ignore_sent_flag && vstream->sent_flag)) { |
7591bab1 MD |
224 | pthread_mutex_unlock(&vstream->stream->lock); |
225 | viewer_stream_put(vstream); | |
2f8f53af DG |
226 | continue; |
227 | } | |
228 | ||
7591bab1 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); |
7591bab1 MD |
232 | send_stream.metadata_flag = htobe32( |
233 | vstream->stream->is_metadata); | |
f8f011fb 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 | |
7591bab1 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)); |
7591bab1 | 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, | |
bddf80e4 | 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 | /* | |
7591bab1 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 | */ |
7591bab1 | 292 | pthread_mutex_lock(&session->lock); |
2f8f53af | 293 | |
bddf80e4 MD |
294 | if (session->connection_closed) { |
295 | *closed = true; | |
296 | } | |
297 | ||
2f8f53af | 298 | /* |
7591bab1 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 | ||
7591bab1 | 309 | if (!ctf_trace_get(ctf_trace)) { |
2f8f53af DG |
310 | continue; |
311 | } | |
312 | ||
7591bab1 | 313 | cds_list_for_each_entry_rcu(stream, &ctf_trace->stream_list, stream_node) { |
2a174661 DG |
314 | struct relay_viewer_stream *vstream; |
315 | ||
7591bab1 | 316 | if (!stream_get(stream)) { |
2a174661 DG |
317 | continue; |
318 | } | |
7591bab1 | 319 | /* |
d812ecb9 | 320 | * stream published is protected by the session lock. |
7591bab1 MD |
321 | */ |
322 | if (!stream->published) { | |
323 | goto next; | |
324 | } | |
325 | vstream = viewer_stream_get_by_id(stream->stream_handle); | |
2f8f53af | 326 | if (!vstream) { |
7591bab1 | 327 | vstream = viewer_stream_create(stream, seek_t); |
2a174661 DG |
328 | if (!vstream) { |
329 | ret = -1; | |
7591bab1 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 | } | |
2229a09c MD |
339 | /* |
340 | * Ensure a self-reference is preserved even | |
341 | * after we have put our local reference. | |
342 | */ | |
862d3a3b MD |
343 | if (!viewer_stream_get(vstream)) { |
344 | ERR("Unable to get self-reference on viewer stream, logic error."); | |
345 | abort(); | |
346 | } | |
7591bab1 MD |
347 | } else { |
348 | if (!vstream->sent_flag && nb_unsent) { | |
349 | /* Update number of unsent stream counter. */ | |
350 | (*nb_unsent)++; | |
351 | } | |
2f8f53af | 352 | } |
2a174661 DG |
353 | /* Update number of total stream counter. */ |
354 | if (nb_total) { | |
2229a09c MD |
355 | if (stream->is_metadata) { |
356 | if (!stream->closed || | |
357 | stream->metadata_received > vstream->metadata_sent) { | |
358 | (*nb_total)++; | |
359 | } | |
360 | } else { | |
361 | if (!stream->closed || | |
362 | !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
363 | ||
364 | (*nb_total)++; | |
365 | } | |
366 | } | |
2f8f53af | 367 | } |
2229a09c MD |
368 | /* Put local reference. */ |
369 | viewer_stream_put(vstream); | |
7591bab1 MD |
370 | next: |
371 | stream_put(stream); | |
2f8f53af | 372 | } |
7591bab1 | 373 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
374 | } |
375 | ||
376 | ret = 0; | |
377 | ||
378 | error_unlock: | |
2a174661 | 379 | rcu_read_unlock(); |
7591bab1 | 380 | pthread_mutex_unlock(&session->lock); |
2f8f53af DG |
381 | return ret; |
382 | } | |
383 | ||
b4aacfdc | 384 | int relayd_live_stop(void) |
d3e2ba59 | 385 | { |
b4aacfdc | 386 | /* Stop dispatch thread */ |
d3e2ba59 | 387 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 388 | futex_nto1_wake(&viewer_conn_queue.futex); |
b4aacfdc | 389 | return 0; |
d3e2ba59 JD |
390 | } |
391 | ||
d3e2ba59 JD |
392 | /* |
393 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
394 | */ | |
395 | static | |
0ce7d979 JG |
396 | int create_named_thread_poll_set(struct lttng_poll_event *events, |
397 | int size, const char *name) | |
d3e2ba59 JD |
398 | { |
399 | int ret; | |
400 | ||
401 | if (events == NULL || size == 0) { | |
402 | ret = -1; | |
403 | goto error; | |
404 | } | |
405 | ||
0ce7d979 JG |
406 | ret = fd_tracker_util_poll_create(the_fd_tracker, |
407 | name, events, 1, LTTNG_CLOEXEC); | |
d3e2ba59 JD |
408 | |
409 | /* Add quit pipe */ | |
bcf4a440 | 410 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
411 | if (ret < 0) { |
412 | goto error; | |
413 | } | |
414 | ||
415 | return 0; | |
416 | ||
417 | error: | |
418 | return ret; | |
419 | } | |
420 | ||
421 | /* | |
422 | * Check if the thread quit pipe was triggered. | |
423 | * | |
424 | * Return 1 if it was triggered else 0; | |
425 | */ | |
426 | static | |
bcf4a440 | 427 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 428 | { |
bcf4a440 | 429 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
430 | return 1; |
431 | } | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | /* | |
437 | * Create and init socket from uri. | |
438 | */ | |
439 | static | |
440 | struct lttcomm_sock *init_socket(struct lttng_uri *uri) | |
441 | { | |
442 | int ret; | |
443 | struct lttcomm_sock *sock = NULL; | |
444 | ||
445 | sock = lttcomm_alloc_sock_from_uri(uri); | |
446 | if (sock == NULL) { | |
447 | ERR("Allocating socket"); | |
448 | goto error; | |
449 | } | |
450 | ||
451 | ret = lttcomm_create_sock(sock); | |
452 | if (ret < 0) { | |
453 | goto error; | |
454 | } | |
2288467f | 455 | DBG("Listening on sock %d for lttng-live", sock->fd); |
d3e2ba59 JD |
456 | |
457 | ret = sock->ops->bind(sock); | |
458 | if (ret < 0) { | |
2288467f | 459 | PERROR("Failed to bind lttng-live socket"); |
d3e2ba59 JD |
460 | goto error; |
461 | } | |
462 | ||
463 | ret = sock->ops->listen(sock, -1); | |
464 | if (ret < 0) { | |
465 | goto error; | |
466 | ||
467 | } | |
468 | ||
469 | return sock; | |
470 | ||
471 | error: | |
472 | if (sock) { | |
473 | lttcomm_destroy_sock(sock); | |
474 | } | |
475 | return NULL; | |
476 | } | |
477 | ||
478 | /* | |
479 | * This thread manages the listening for new connections on the network | |
480 | */ | |
481 | static | |
482 | void *thread_listener(void *data) | |
483 | { | |
484 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
485 | uint32_t revents, nb_fd; |
486 | struct lttng_poll_event events; | |
487 | struct lttcomm_sock *live_control_sock; | |
488 | ||
489 | DBG("[thread] Relay live listener started"); | |
490 | ||
eea7556c MD |
491 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
492 | ||
493 | health_code_update(); | |
494 | ||
d3e2ba59 JD |
495 | live_control_sock = init_socket(live_uri); |
496 | if (!live_control_sock) { | |
497 | goto error_sock_control; | |
498 | } | |
499 | ||
fb4d42ab | 500 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
0ce7d979 JG |
501 | ret = create_named_thread_poll_set(&events, 2, |
502 | "Live listener thread epoll"); | |
d3e2ba59 JD |
503 | if (ret < 0) { |
504 | goto error_create_poll; | |
505 | } | |
506 | ||
507 | /* Add the control socket */ | |
508 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
509 | if (ret < 0) { | |
510 | goto error_poll_add; | |
511 | } | |
512 | ||
3fd27398 MD |
513 | lttng_relay_notify_ready(); |
514 | ||
9b5e0863 MD |
515 | if (testpoint(relayd_thread_live_listener)) { |
516 | goto error_testpoint; | |
517 | } | |
518 | ||
d3e2ba59 | 519 | while (1) { |
eea7556c MD |
520 | health_code_update(); |
521 | ||
d3e2ba59 JD |
522 | DBG("Listener accepting live viewers connections"); |
523 | ||
524 | restart: | |
eea7556c | 525 | health_poll_entry(); |
d3e2ba59 | 526 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 527 | health_poll_exit(); |
d3e2ba59 JD |
528 | if (ret < 0) { |
529 | /* | |
530 | * Restart interrupted system call. | |
531 | */ | |
532 | if (errno == EINTR) { | |
533 | goto restart; | |
534 | } | |
535 | goto error; | |
536 | } | |
537 | nb_fd = ret; | |
538 | ||
539 | DBG("Relay new viewer connection received"); | |
540 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
541 | health_code_update(); |
542 | ||
d3e2ba59 JD |
543 | /* Fetch once the poll data */ |
544 | revents = LTTNG_POLL_GETEV(&events, i); | |
545 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
546 | ||
fd20dac9 MD |
547 | if (!revents) { |
548 | /* No activity for this FD (poll implementation). */ | |
549 | continue; | |
550 | } | |
551 | ||
d3e2ba59 | 552 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 553 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
554 | if (ret) { |
555 | err = 0; | |
556 | goto exit; | |
557 | } | |
558 | ||
03e43155 | 559 | if (revents & LPOLLIN) { |
d3e2ba59 | 560 | /* |
7591bab1 MD |
561 | * A new connection is requested, therefore a |
562 | * viewer connection is allocated in this | |
563 | * thread, enqueued to a global queue and | |
564 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 565 | */ |
58eb9381 DG |
566 | int val = 1; |
567 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
568 | struct lttcomm_sock *newsock; |
569 | ||
d3e2ba59 JD |
570 | newsock = live_control_sock->ops->accept(live_control_sock); |
571 | if (!newsock) { | |
572 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
573 | goto error; |
574 | } | |
575 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 576 | |
d3e2ba59 | 577 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 578 | sizeof(val)); |
d3e2ba59 JD |
579 | if (ret < 0) { |
580 | PERROR("setsockopt inet"); | |
581 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
582 | goto error; |
583 | } | |
7591bab1 MD |
584 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
585 | if (!new_conn) { | |
586 | lttcomm_destroy_sock(newsock); | |
587 | goto error; | |
588 | } | |
589 | /* Ownership assumed by the connection. */ | |
590 | newsock = NULL; | |
d3e2ba59 | 591 | |
58eb9381 | 592 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
593 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
594 | &new_conn->qnode); | |
d3e2ba59 JD |
595 | |
596 | /* | |
7591bab1 MD |
597 | * Wake the dispatch queue futex. |
598 | * Implicit memory barrier with the | |
599 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 600 | */ |
58eb9381 | 601 | futex_nto1_wake(&viewer_conn_queue.futex); |
03e43155 MD |
602 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
603 | ERR("socket poll error"); | |
604 | goto error; | |
605 | } else { | |
606 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
607 | goto error; | |
d3e2ba59 JD |
608 | } |
609 | } | |
610 | } | |
611 | ||
612 | exit: | |
613 | error: | |
614 | error_poll_add: | |
9b5e0863 | 615 | error_testpoint: |
0ce7d979 | 616 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 JD |
617 | error_create_poll: |
618 | if (live_control_sock->fd >= 0) { | |
619 | ret = live_control_sock->ops->close(live_control_sock); | |
620 | if (ret) { | |
621 | PERROR("close"); | |
622 | } | |
623 | } | |
624 | lttcomm_destroy_sock(live_control_sock); | |
625 | error_sock_control: | |
626 | if (err) { | |
eea7556c | 627 | health_error(); |
d3e2ba59 JD |
628 | DBG("Live viewer listener thread exited with error"); |
629 | } | |
eea7556c | 630 | health_unregister(health_relayd); |
d3e2ba59 | 631 | DBG("Live viewer listener thread cleanup complete"); |
b4aacfdc MD |
632 | if (lttng_relay_stop_threads()) { |
633 | ERR("Error stopping threads"); | |
178a0557 | 634 | } |
d3e2ba59 JD |
635 | return NULL; |
636 | } | |
637 | ||
638 | /* | |
639 | * This thread manages the dispatching of the requests to worker threads | |
640 | */ | |
641 | static | |
642 | void *thread_dispatcher(void *data) | |
643 | { | |
6cd525e8 MD |
644 | int err = -1; |
645 | ssize_t ret; | |
8bdee6e2 | 646 | struct cds_wfcq_node *node; |
58eb9381 | 647 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
648 | |
649 | DBG("[thread] Live viewer relay dispatcher started"); | |
650 | ||
eea7556c MD |
651 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
652 | ||
9b5e0863 MD |
653 | if (testpoint(relayd_thread_live_dispatcher)) { |
654 | goto error_testpoint; | |
655 | } | |
656 | ||
eea7556c MD |
657 | health_code_update(); |
658 | ||
0ed3b1a8 | 659 | for (;;) { |
eea7556c MD |
660 | health_code_update(); |
661 | ||
d3e2ba59 | 662 | /* Atomically prepare the queue futex */ |
58eb9381 | 663 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 | 664 | |
0ed3b1a8 MD |
665 | if (CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
666 | break; | |
667 | } | |
668 | ||
d3e2ba59 | 669 | do { |
eea7556c MD |
670 | health_code_update(); |
671 | ||
d3e2ba59 | 672 | /* Dequeue commands */ |
8bdee6e2 SM |
673 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
674 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
675 | if (node == NULL) { |
676 | DBG("Woken up but nothing in the live-viewer " | |
677 | "relay command queue"); | |
678 | /* Continue thread execution */ | |
679 | break; | |
680 | } | |
58eb9381 | 681 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 682 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 683 | conn->sock->fd); |
d3e2ba59 JD |
684 | |
685 | /* | |
7591bab1 MD |
686 | * Inform worker thread of the new request. This |
687 | * call is blocking so we can be assured that | |
688 | * the data will be read at some point in time | |
689 | * or wait to the end of the world :) | |
d3e2ba59 | 690 | */ |
58eb9381 DG |
691 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
692 | if (ret < 0) { | |
693 | PERROR("write conn pipe"); | |
7591bab1 | 694 | connection_put(conn); |
d3e2ba59 JD |
695 | goto error; |
696 | } | |
697 | } while (node != NULL); | |
698 | ||
699 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 700 | health_poll_entry(); |
58eb9381 | 701 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 702 | health_poll_exit(); |
d3e2ba59 JD |
703 | } |
704 | ||
eea7556c MD |
705 | /* Normal exit, no error */ |
706 | err = 0; | |
707 | ||
d3e2ba59 | 708 | error: |
9b5e0863 | 709 | error_testpoint: |
eea7556c MD |
710 | if (err) { |
711 | health_error(); | |
712 | ERR("Health error occurred in %s", __func__); | |
713 | } | |
714 | health_unregister(health_relayd); | |
d3e2ba59 | 715 | DBG("Live viewer dispatch thread dying"); |
b4aacfdc MD |
716 | if (lttng_relay_stop_threads()) { |
717 | ERR("Error stopping threads"); | |
178a0557 | 718 | } |
d3e2ba59 JD |
719 | return NULL; |
720 | } | |
721 | ||
722 | /* | |
723 | * Establish connection with the viewer and check the versions. | |
724 | * | |
725 | * Return 0 on success or else negative value. | |
726 | */ | |
727 | static | |
58eb9381 | 728 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
729 | { |
730 | int ret; | |
731 | struct lttng_viewer_connect reply, msg; | |
732 | ||
58eb9381 | 733 | conn->version_check_done = 1; |
d3e2ba59 | 734 | |
eea7556c MD |
735 | health_code_update(); |
736 | ||
2f8f53af DG |
737 | DBG("Viewer is establishing a connection to the relayd."); |
738 | ||
58eb9381 | 739 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 740 | if (ret < 0) { |
d3e2ba59 JD |
741 | goto end; |
742 | } | |
743 | ||
eea7556c MD |
744 | health_code_update(); |
745 | ||
f46b2ce6 | 746 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
747 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
748 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
749 | ||
750 | /* Major versions must be the same */ | |
751 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
752 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
753 | reply.major, be32toh(msg.major)); | |
72180669 | 754 | ret = -1; |
d3e2ba59 JD |
755 | goto end; |
756 | } | |
757 | ||
58eb9381 | 758 | conn->major = reply.major; |
d3e2ba59 JD |
759 | /* We adapt to the lowest compatible version */ |
760 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 761 | conn->minor = reply.minor; |
d3e2ba59 | 762 | } else { |
58eb9381 | 763 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
764 | } |
765 | ||
c4e361a4 | 766 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 767 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 768 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 769 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
770 | } else { |
771 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
772 | ret = -1; | |
773 | goto end; | |
774 | } | |
775 | ||
776 | reply.major = htobe32(reply.major); | |
777 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 778 | if (conn->type == RELAY_VIEWER_COMMAND) { |
93b4787b | 779 | /* |
7591bab1 MD |
780 | * Increment outside of htobe64 macro, because the argument can |
781 | * be used more than once within the macro, and thus the | |
782 | * operation may be undefined. | |
93b4787b | 783 | */ |
7591bab1 | 784 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
93b4787b | 785 | last_relay_viewer_session_id++; |
7591bab1 | 786 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
93b4787b | 787 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 788 | } |
eea7556c MD |
789 | |
790 | health_code_update(); | |
791 | ||
58eb9381 | 792 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 793 | if (ret < 0) { |
2f8f53af | 794 | goto end; |
d3e2ba59 JD |
795 | } |
796 | ||
eea7556c MD |
797 | health_code_update(); |
798 | ||
58eb9381 | 799 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
800 | ret = 0; |
801 | ||
802 | end: | |
803 | return ret; | |
804 | } | |
805 | ||
806 | /* | |
807 | * Send the viewer the list of current sessions. | |
7591bab1 MD |
808 | * We need to create a copy of the hash table content because otherwise |
809 | * we cannot assume the number of entries stays the same between getting | |
810 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
811 | * |
812 | * Return 0 on success or else a negative value. | |
813 | */ | |
814 | static | |
58eb9381 | 815 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 | 816 | { |
5f10c6b1 | 817 | int ret = 0; |
d3e2ba59 | 818 | struct lttng_viewer_list_sessions session_list; |
d3e2ba59 | 819 | struct lttng_ht_iter iter; |
d3e2ba59 | 820 | struct relay_session *session; |
7591bab1 MD |
821 | struct lttng_viewer_session *send_session_buf = NULL; |
822 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
823 | uint32_t count = 0; | |
d3e2ba59 JD |
824 | |
825 | DBG("List sessions received"); | |
826 | ||
7591bab1 MD |
827 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
828 | if (!send_session_buf) { | |
829 | return -1; | |
d3e2ba59 JD |
830 | } |
831 | ||
7591bab1 MD |
832 | rcu_read_lock(); |
833 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 834 | session_n.node) { |
7591bab1 | 835 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 836 | |
eea7556c MD |
837 | health_code_update(); |
838 | ||
7591bab1 MD |
839 | if (count >= buf_count) { |
840 | struct lttng_viewer_session *newbuf; | |
841 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 842 | |
7591bab1 MD |
843 | newbuf = realloc(send_session_buf, |
844 | new_buf_count * sizeof(*send_session_buf)); | |
845 | if (!newbuf) { | |
846 | ret = -1; | |
5f10c6b1 | 847 | break; |
7591bab1 MD |
848 | } |
849 | send_session_buf = newbuf; | |
850 | buf_count = new_buf_count; | |
6763619c | 851 | } |
7591bab1 | 852 | send_session = &send_session_buf[count]; |
bfc3fb17 MD |
853 | if (lttng_strncpy(send_session->session_name, |
854 | session->session_name, | |
855 | sizeof(send_session->session_name))) { | |
856 | ret = -1; | |
5f10c6b1 | 857 | break; |
bfc3fb17 MD |
858 | } |
859 | if (lttng_strncpy(send_session->hostname, session->hostname, | |
860 | sizeof(send_session->hostname))) { | |
861 | ret = -1; | |
5f10c6b1 | 862 | break; |
bfc3fb17 | 863 | } |
7591bab1 MD |
864 | send_session->id = htobe64(session->id); |
865 | send_session->live_timer = htobe32(session->live_timer); | |
866 | if (session->viewer_attached) { | |
867 | send_session->clients = htobe32(1); | |
868 | } else { | |
869 | send_session->clients = htobe32(0); | |
d227d5bd | 870 | } |
7591bab1 MD |
871 | send_session->streams = htobe32(session->stream_count); |
872 | count++; | |
873 | } | |
874 | rcu_read_unlock(); | |
5f10c6b1 JG |
875 | if (ret < 0) { |
876 | goto end_free; | |
877 | } | |
d227d5bd | 878 | |
7591bab1 | 879 | session_list.sessions_count = htobe32(count); |
d227d5bd | 880 | |
7591bab1 | 881 | health_code_update(); |
d227d5bd | 882 | |
7591bab1 MD |
883 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
884 | if (ret < 0) { | |
885 | goto end_free; | |
d227d5bd | 886 | } |
d227d5bd | 887 | |
7591bab1 | 888 | health_code_update(); |
d227d5bd | 889 | |
7591bab1 MD |
890 | ret = send_response(conn->sock, send_session_buf, |
891 | count * sizeof(*send_session_buf)); | |
892 | if (ret < 0) { | |
893 | goto end_free; | |
d227d5bd | 894 | } |
7591bab1 | 895 | health_code_update(); |
d227d5bd | 896 | |
7591bab1 MD |
897 | ret = 0; |
898 | end_free: | |
899 | free(send_session_buf); | |
900 | return ret; | |
d227d5bd JD |
901 | } |
902 | ||
80e8027a | 903 | /* |
7591bab1 | 904 | * Send the viewer the list of current streams. |
80e8027a JD |
905 | */ |
906 | static | |
58eb9381 | 907 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
908 | { |
909 | int ret, send_streams = 0; | |
7591bab1 | 910 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
911 | struct lttng_viewer_new_streams_request request; |
912 | struct lttng_viewer_new_streams_response response; | |
80e8027a | 913 | struct relay_session *session; |
6763619c | 914 | uint64_t session_id; |
bddf80e4 | 915 | bool closed = false; |
80e8027a | 916 | |
58eb9381 | 917 | assert(conn); |
80e8027a JD |
918 | |
919 | DBG("Get new streams received"); | |
920 | ||
80e8027a JD |
921 | health_code_update(); |
922 | ||
2f8f53af | 923 | /* Receive the request from the connected client. */ |
58eb9381 | 924 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 925 | if (ret < 0) { |
80e8027a JD |
926 | goto error; |
927 | } | |
6763619c | 928 | session_id = be64toh(request.session_id); |
80e8027a JD |
929 | |
930 | health_code_update(); | |
931 | ||
53efb85a MD |
932 | memset(&response, 0, sizeof(response)); |
933 | ||
7591bab1 | 934 | session = session_get_by_id(session_id); |
2f8f53af | 935 | if (!session) { |
6763619c | 936 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 937 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
938 | goto send_reply; |
939 | } | |
940 | ||
7591bab1 | 941 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
80e8027a | 942 | send_streams = 0; |
c4e361a4 | 943 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
944 | goto send_reply; |
945 | } | |
946 | ||
6763619c JD |
947 | send_streams = 1; |
948 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
949 | ||
7591bab1 | 950 | ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, |
bddf80e4 | 951 | &nb_created, &closed); |
2f8f53af | 952 | if (ret < 0) { |
7591bab1 | 953 | goto end_put_session; |
2f8f53af DG |
954 | } |
955 | /* Only send back the newly created streams with the unsent ones. */ | |
956 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
957 | response.streams_count = htobe32(nb_streams); |
958 | ||
4479f682 | 959 | /* |
2229a09c MD |
960 | * If the session is closed, HUP when there are no more streams |
961 | * with data. | |
4479f682 | 962 | */ |
bddf80e4 | 963 | if (closed && nb_total == 0) { |
4479f682 | 964 | send_streams = 0; |
bddf80e4 | 965 | response.streams_count = 0; |
4479f682 JD |
966 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
967 | goto send_reply; | |
968 | } | |
969 | ||
80e8027a JD |
970 | send_reply: |
971 | health_code_update(); | |
58eb9381 | 972 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 973 | if (ret < 0) { |
7591bab1 | 974 | goto end_put_session; |
80e8027a JD |
975 | } |
976 | health_code_update(); | |
977 | ||
978 | /* | |
7591bab1 MD |
979 | * Unknown or empty session, just return gracefully, the viewer |
980 | * knows what is happening. | |
80e8027a JD |
981 | */ |
982 | if (!send_streams || !nb_streams) { | |
983 | ret = 0; | |
7591bab1 | 984 | goto end_put_session; |
80e8027a JD |
985 | } |
986 | ||
2f8f53af | 987 | /* |
7591bab1 MD |
988 | * Send stream and *DON'T* ignore the sent flag so every viewer |
989 | * streams that were not sent from that point will be sent to | |
990 | * the viewer. | |
2f8f53af | 991 | */ |
58eb9381 | 992 | ret = send_viewer_streams(conn->sock, session, 0); |
2f8f53af | 993 | if (ret < 0) { |
7591bab1 | 994 | goto end_put_session; |
80e8027a JD |
995 | } |
996 | ||
7591bab1 MD |
997 | end_put_session: |
998 | if (session) { | |
999 | session_put(session); | |
1000 | } | |
80e8027a JD |
1001 | error: |
1002 | return ret; | |
1003 | } | |
1004 | ||
d3e2ba59 JD |
1005 | /* |
1006 | * Send the viewer the list of current sessions. | |
1007 | */ | |
1008 | static | |
58eb9381 | 1009 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 1010 | { |
2f8f53af DG |
1011 | int send_streams = 0; |
1012 | ssize_t ret; | |
80e8027a | 1013 | uint32_t nb_streams = 0; |
2f8f53af | 1014 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
1015 | struct lttng_viewer_attach_session_request request; |
1016 | struct lttng_viewer_attach_session_response response; | |
7591bab1 | 1017 | struct relay_session *session = NULL; |
bddf80e4 | 1018 | bool closed = false; |
d3e2ba59 | 1019 | |
58eb9381 | 1020 | assert(conn); |
d3e2ba59 | 1021 | |
eea7556c MD |
1022 | health_code_update(); |
1023 | ||
2f8f53af | 1024 | /* Receive the request from the connected client. */ |
58eb9381 | 1025 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1026 | if (ret < 0) { |
d3e2ba59 JD |
1027 | goto error; |
1028 | } | |
1029 | ||
eea7556c MD |
1030 | health_code_update(); |
1031 | ||
53efb85a MD |
1032 | memset(&response, 0, sizeof(response)); |
1033 | ||
c3b7390b JD |
1034 | if (!conn->viewer_session) { |
1035 | DBG("Client trying to attach before creating a live viewer session"); | |
1036 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1037 | goto send_reply; | |
1038 | } | |
1039 | ||
7591bab1 | 1040 | session = session_get_by_id(be64toh(request.session_id)); |
2f8f53af | 1041 | if (!session) { |
d3e2ba59 | 1042 | DBG("Relay session %" PRIu64 " not found", |
9b9f9f94 | 1043 | (uint64_t) be64toh(request.session_id)); |
c4e361a4 | 1044 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1045 | goto send_reply; |
1046 | } | |
7591bab1 | 1047 | DBG("Attach session ID %" PRIu64 " received", |
9b9f9f94 | 1048 | (uint64_t) be64toh(request.session_id)); |
d3e2ba59 | 1049 | |
7591bab1 | 1050 | if (session->live_timer == 0) { |
d3e2ba59 | 1051 | DBG("Not live session"); |
c4e361a4 | 1052 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1053 | goto send_reply; |
7591bab1 MD |
1054 | } |
1055 | ||
1056 | send_streams = 1; | |
1057 | ret = viewer_session_attach(conn->viewer_session, session); | |
1058 | if (ret) { | |
1059 | DBG("Already a viewer attached"); | |
1060 | response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); | |
1061 | goto send_reply; | |
d3e2ba59 JD |
1062 | } |
1063 | ||
1064 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1065 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1066 | case LTTNG_VIEWER_SEEK_LAST: | |
7591bab1 | 1067 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1068 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1069 | break; |
1070 | default: | |
1071 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1072 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1073 | send_streams = 0; |
1074 | goto send_reply; | |
1075 | } | |
1076 | ||
bddf80e4 MD |
1077 | ret = make_viewer_streams(session, seek_type, &nb_streams, NULL, |
1078 | NULL, &closed); | |
2f8f53af | 1079 | if (ret < 0) { |
7591bab1 | 1080 | goto end_put_session; |
d3e2ba59 | 1081 | } |
2f8f53af | 1082 | response.streams_count = htobe32(nb_streams); |
d3e2ba59 | 1083 | |
bddf80e4 MD |
1084 | /* |
1085 | * If the session is closed when the viewer is attaching, it | |
1086 | * means some of the streams may have been concurrently removed, | |
1087 | * so we don't allow the viewer to attach, even if there are | |
1088 | * streams available. | |
1089 | */ | |
1090 | if (closed) { | |
1091 | send_streams = 0; | |
1092 | response.streams_count = 0; | |
1093 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); | |
1094 | goto send_reply; | |
1095 | } | |
1096 | ||
d3e2ba59 | 1097 | send_reply: |
eea7556c | 1098 | health_code_update(); |
58eb9381 | 1099 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1100 | if (ret < 0) { |
7591bab1 | 1101 | goto end_put_session; |
d3e2ba59 | 1102 | } |
eea7556c | 1103 | health_code_update(); |
d3e2ba59 JD |
1104 | |
1105 | /* | |
7591bab1 MD |
1106 | * Unknown or empty session, just return gracefully, the viewer |
1107 | * knows what is happening. | |
d3e2ba59 | 1108 | */ |
157df586 | 1109 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1110 | ret = 0; |
7591bab1 | 1111 | goto end_put_session; |
d3e2ba59 JD |
1112 | } |
1113 | ||
2f8f53af | 1114 | /* Send stream and ignore the sent flag. */ |
58eb9381 | 1115 | ret = send_viewer_streams(conn->sock, session, 1); |
2f8f53af | 1116 | if (ret < 0) { |
7591bab1 | 1117 | goto end_put_session; |
d3e2ba59 | 1118 | } |
d3e2ba59 | 1119 | |
7591bab1 MD |
1120 | end_put_session: |
1121 | if (session) { | |
1122 | session_put(session); | |
1123 | } | |
4a9daf17 JD |
1124 | error: |
1125 | return ret; | |
1126 | } | |
1127 | ||
878c34cf DG |
1128 | /* |
1129 | * Open the index file if needed for the given vstream. | |
1130 | * | |
f8f3885c MD |
1131 | * If an index file is successfully opened, the vstream will set it as its |
1132 | * current index file. | |
878c34cf DG |
1133 | * |
1134 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
7591bab1 MD |
1135 | * |
1136 | * Called with rstream lock held. | |
878c34cf DG |
1137 | */ |
1138 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1139 | struct relay_stream *rstream) | |
1140 | { | |
1141 | int ret = 0; | |
1142 | ||
f8f3885c | 1143 | if (vstream->index_file) { |
878c34cf DG |
1144 | goto end; |
1145 | } | |
1146 | ||
1147 | /* | |
7591bab1 | 1148 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1149 | */ |
a44ca2ca | 1150 | if (rstream->index_received_seqcount == 0) { |
878c34cf DG |
1151 | ret = -ENOENT; |
1152 | goto end; | |
1153 | } | |
f8f3885c MD |
1154 | vstream->index_file = lttng_index_file_open(vstream->path_name, |
1155 | vstream->channel_name, | |
7591bab1 MD |
1156 | vstream->stream->tracefile_count, |
1157 | vstream->current_tracefile_id); | |
f8f3885c MD |
1158 | if (!vstream->index_file) { |
1159 | ret = -1; | |
878c34cf DG |
1160 | } |
1161 | ||
1162 | end: | |
1163 | return ret; | |
1164 | } | |
1165 | ||
1166 | /* | |
7591bab1 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 | * |
7591bab1 | 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 | ||
797bc362 | 1183 | if ((trace->session->connection_closed || rstream->closed) |
a44ca2ca MD |
1184 | && rstream->index_received_seqcount |
1185 | == vstream->index_sent_seqcount) { | |
797bc362 MD |
1186 | /* |
1187 | * Last index sent and session connection or relay | |
1188 | * stream are closed. | |
1189 | */ | |
7591bab1 MD |
1190 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
1191 | goto hup; | |
1192 | } else if (rstream->beacon_ts_end != -1ULL && | |
a44ca2ca MD |
1193 | rstream->index_received_seqcount |
1194 | == vstream->index_sent_seqcount) { | |
7591bab1 MD |
1195 | /* |
1196 | * We've received a synchronization beacon and the last index | |
1197 | * available has been sent, the index for now is inactive. | |
1198 | * | |
1199 | * In this case, we have received a beacon which allows us to | |
1200 | * inform the client of a time interval during which we can | |
1201 | * guarantee that there are no events to read (and never will | |
1202 | * be). | |
1203 | */ | |
1204 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1205 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1206 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
1207 | goto index_ready; | |
a44ca2ca MD |
1208 | } else if (rstream->index_received_seqcount |
1209 | == vstream->index_sent_seqcount) { | |
7591bab1 | 1210 | /* |
a44ca2ca MD |
1211 | * This checks whether received == sent seqcount. In |
1212 | * this case, we have not received a beacon. Therefore, | |
1213 | * we can only ask the client to retry later. | |
7591bab1 MD |
1214 | */ |
1215 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1216 | goto index_ready; | |
a44ca2ca MD |
1217 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
1218 | vstream->current_tracefile_id, | |
1219 | vstream->index_sent_seqcount)) { | |
7591bab1 | 1220 | /* |
a44ca2ca MD |
1221 | * The next index we want to send cannot be read either |
1222 | * because we need to perform a rotation, or due to | |
1223 | * the producer having overwritten its trace file. | |
7591bab1 | 1224 | */ |
a44ca2ca | 1225 | DBG("Viewer stream %" PRIu64 " rotation", |
7591bab1 MD |
1226 | vstream->stream->stream_handle); |
1227 | ret = viewer_stream_rotate(vstream); | |
1228 | if (ret < 0) { | |
1229 | goto end; | |
1230 | } else if (ret == 1) { | |
1231 | /* EOF across entire stream. */ | |
1232 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1233 | goto hup; | |
1234 | } | |
7591bab1 | 1235 | /* |
a44ca2ca MD |
1236 | * If we have been pushed due to overwrite, it |
1237 | * necessarily means there is data that can be read in | |
1238 | * the stream. If we rotated because we reached the end | |
1239 | * of a tracefile, it means the following tracefile | |
1240 | * needs to contain at least one index, else we would | |
1241 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1242 | * viewer. The updated index_sent_seqcount needs to | |
1243 | * point to a readable index entry now. | |
1244 | * | |
1245 | * In the case where we "rotate" on a single file, we | |
1246 | * can end up in a case where the requested index is | |
1247 | * still unavailable. | |
7591bab1 | 1248 | */ |
a44ca2ca MD |
1249 | if (rstream->tracefile_count == 1 && |
1250 | !tracefile_array_seq_in_file( | |
1251 | rstream->tfa, | |
1252 | vstream->current_tracefile_id, | |
1253 | vstream->index_sent_seqcount)) { | |
1254 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1255 | goto index_ready; | |
878c34cf | 1256 | } |
a44ca2ca MD |
1257 | assert(tracefile_array_seq_in_file(rstream->tfa, |
1258 | vstream->current_tracefile_id, | |
1259 | vstream->index_sent_seqcount)); | |
878c34cf | 1260 | } |
a44ca2ca MD |
1261 | /* ret == 0 means successful so we continue. */ |
1262 | ret = 0; | |
7591bab1 | 1263 | end: |
878c34cf DG |
1264 | return ret; |
1265 | ||
1266 | hup: | |
7591bab1 | 1267 | viewer_stream_put(vstream); |
878c34cf DG |
1268 | index_ready: |
1269 | return 1; | |
1270 | } | |
1271 | ||
d3e2ba59 JD |
1272 | /* |
1273 | * Send the next index for a stream. | |
1274 | * | |
1275 | * Return 0 on success or else a negative value. | |
1276 | */ | |
1277 | static | |
58eb9381 | 1278 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1279 | { |
1280 | int ret; | |
1281 | struct lttng_viewer_get_next_index request_index; | |
1282 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1283 | struct ctf_packet_index packet_index; |
7591bab1 MD |
1284 | struct relay_viewer_stream *vstream = NULL; |
1285 | struct relay_stream *rstream = NULL; | |
1286 | struct ctf_trace *ctf_trace = NULL; | |
1287 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1288 | |
58eb9381 | 1289 | assert(conn); |
d3e2ba59 JD |
1290 | |
1291 | DBG("Viewer get next index"); | |
1292 | ||
7591bab1 | 1293 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1294 | health_code_update(); |
2f8f53af | 1295 | |
58eb9381 | 1296 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1297 | if (ret < 0) { |
d3e2ba59 JD |
1298 | goto end; |
1299 | } | |
eea7556c | 1300 | health_code_update(); |
d3e2ba59 | 1301 | |
7591bab1 | 1302 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1303 | if (!vstream) { |
a44ca2ca | 1304 | DBG("Client requested index of unknown stream id %" PRIu64, |
9b9f9f94 | 1305 | (uint64_t) be64toh(request_index.stream_id)); |
f1883937 MD |
1306 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1307 | goto send_reply; | |
2a174661 DG |
1308 | } |
1309 | ||
7591bab1 MD |
1310 | /* Use back. ref. Protected by refcounts. */ |
1311 | rstream = vstream->stream; | |
1312 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1313 | |
7591bab1 MD |
1314 | /* metadata_viewer_stream may be NULL. */ |
1315 | metadata_viewer_stream = | |
1316 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1317 | |
7591bab1 | 1318 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1319 | |
1320 | /* | |
1321 | * The viewer should not ask for index on metadata stream. | |
1322 | */ | |
7591bab1 | 1323 | if (rstream->is_metadata) { |
c4e361a4 | 1324 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1325 | goto send_reply; |
1326 | } | |
1327 | ||
878c34cf DG |
1328 | /* Try to open an index if one is needed for that stream. */ |
1329 | ret = try_open_index(vstream, rstream); | |
1330 | if (ret < 0) { | |
0e6830aa | 1331 | if (ret == -ENOENT) { |
d3e2ba59 | 1332 | /* |
7591bab1 MD |
1333 | * The index is created only when the first data |
1334 | * packet arrives, it might not be ready at the | |
1335 | * beginning of the session | |
d3e2ba59 | 1336 | */ |
c4e361a4 | 1337 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); |
878c34cf DG |
1338 | } else { |
1339 | /* Unhandled error. */ | |
c4e361a4 | 1340 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
d3e2ba59 | 1341 | } |
878c34cf | 1342 | goto send_reply; |
d3e2ba59 JD |
1343 | } |
1344 | ||
878c34cf | 1345 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1346 | if (ret < 0) { |
7591bab1 | 1347 | goto error_put; |
878c34cf DG |
1348 | } else if (ret == 1) { |
1349 | /* | |
7591bab1 MD |
1350 | * We have no index to send and check_index_status has populated |
1351 | * viewer_index's status. | |
878c34cf | 1352 | */ |
d3e2ba59 JD |
1353 | goto send_reply; |
1354 | } | |
7591bab1 | 1355 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1356 | assert(!ret); |
d3e2ba59 | 1357 | |
7591bab1 MD |
1358 | /* |
1359 | * vstream->stream_fd may be NULL if it has been closed by | |
1360 | * tracefile rotation, or if we are at the beginning of the | |
1361 | * stream. We open the data stream file here to protect against | |
1362 | * overwrite caused by tracefile rotation (in association with | |
1363 | * unlink performed before overwrite). | |
1364 | */ | |
1365 | if (!vstream->stream_fd) { | |
1366 | char fullpath[PATH_MAX]; | |
1367 | ||
1368 | if (vstream->stream->tracefile_count > 0) { | |
1369 | ret = snprintf(fullpath, PATH_MAX, "%s/%s_%" PRIu64, | |
1370 | vstream->path_name, | |
1371 | vstream->channel_name, | |
1372 | vstream->current_tracefile_id); | |
1373 | } else { | |
1374 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", | |
1375 | vstream->path_name, | |
1376 | vstream->channel_name); | |
1377 | } | |
1378 | if (ret < 0) { | |
1379 | goto error_put; | |
1380 | } | |
1381 | ret = open(fullpath, O_RDONLY); | |
1382 | if (ret < 0) { | |
1383 | PERROR("Relay opening trace file"); | |
1384 | goto error_put; | |
1385 | } | |
1386 | vstream->stream_fd = stream_fd_create(ret); | |
1387 | if (!vstream->stream_fd) { | |
1388 | if (close(ret)) { | |
1389 | PERROR("close"); | |
1390 | } | |
1391 | goto error_put; | |
1392 | } | |
d3e2ba59 JD |
1393 | } |
1394 | ||
f04a971b | 1395 | ret = check_new_streams(conn); |
4a9daf17 | 1396 | if (ret < 0) { |
7591bab1 MD |
1397 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1398 | goto send_reply; | |
4a9daf17 JD |
1399 | } else if (ret == 1) { |
1400 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1401 | } | |
1402 | ||
f8f3885c MD |
1403 | ret = lttng_index_file_read(vstream->index_file, &packet_index); |
1404 | if (ret) { | |
1405 | ERR("Relay error reading index file %d", | |
1406 | vstream->index_file->fd); | |
7591bab1 | 1407 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
6b6b9a5a | 1408 | goto send_reply; |
d3e2ba59 | 1409 | } else { |
c4e361a4 | 1410 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
a44ca2ca | 1411 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1412 | } |
1413 | ||
1414 | /* | |
1415 | * Indexes are stored in big endian, no need to switch before sending. | |
1416 | */ | |
7591bab1 MD |
1417 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1418 | rstream->stream_handle, | |
9b9f9f94 | 1419 | (uint64_t) be64toh(packet_index.offset)); |
d3e2ba59 JD |
1420 | viewer_index.offset = packet_index.offset; |
1421 | viewer_index.packet_size = packet_index.packet_size; | |
1422 | viewer_index.content_size = packet_index.content_size; | |
1423 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1424 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1425 | viewer_index.events_discarded = packet_index.events_discarded; | |
1426 | viewer_index.stream_id = packet_index.stream_id; | |
1427 | ||
1428 | send_reply: | |
f1883937 MD |
1429 | if (rstream) { |
1430 | pthread_mutex_unlock(&rstream->lock); | |
1431 | } | |
7591bab1 MD |
1432 | |
1433 | if (metadata_viewer_stream) { | |
1434 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1435 | DBG("get next index metadata check: recv %" PRIu64 | |
1436 | " sent %" PRIu64, | |
1437 | metadata_viewer_stream->stream->metadata_received, | |
1438 | metadata_viewer_stream->metadata_sent); | |
1439 | if (!metadata_viewer_stream->stream->metadata_received || | |
1440 | metadata_viewer_stream->stream->metadata_received > | |
1441 | metadata_viewer_stream->metadata_sent) { | |
1442 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1443 | } | |
1444 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1445 | } | |
1446 | ||
d3e2ba59 | 1447 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1448 | health_code_update(); |
2f8f53af | 1449 | |
58eb9381 | 1450 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1451 | if (ret < 0) { |
7591bab1 | 1452 | goto end; |
d3e2ba59 | 1453 | } |
eea7556c | 1454 | health_code_update(); |
d3e2ba59 | 1455 | |
9237e6a1 MD |
1456 | if (vstream) { |
1457 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
a44ca2ca | 1458 | vstream->index_sent_seqcount, |
9237e6a1 MD |
1459 | vstream->stream->stream_handle); |
1460 | } | |
d3e2ba59 | 1461 | end: |
7591bab1 MD |
1462 | if (metadata_viewer_stream) { |
1463 | viewer_stream_put(metadata_viewer_stream); | |
1464 | } | |
1465 | if (vstream) { | |
1466 | viewer_stream_put(vstream); | |
1467 | } | |
1468 | return ret; | |
1469 | ||
1470 | error_put: | |
1471 | pthread_mutex_unlock(&rstream->lock); | |
1472 | if (metadata_viewer_stream) { | |
1473 | viewer_stream_put(metadata_viewer_stream); | |
1474 | } | |
1475 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1476 | return ret; |
1477 | } | |
1478 | ||
1479 | /* | |
1480 | * Send the next index for a stream | |
1481 | * | |
1482 | * Return 0 on success or else a negative value. | |
1483 | */ | |
1484 | static | |
58eb9381 | 1485 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 | 1486 | { |
b6025e94 | 1487 | int ret; |
a5df8828 | 1488 | off_t lseek_ret; |
553b2adb | 1489 | char *reply = NULL; |
d3e2ba59 | 1490 | struct lttng_viewer_get_packet get_packet_info; |
553b2adb | 1491 | struct lttng_viewer_trace_packet reply_header; |
7591bab1 | 1492 | struct relay_viewer_stream *vstream = NULL; |
553b2adb | 1493 | uint32_t reply_size = sizeof(reply_header); |
b6025e94 JR |
1494 | uint32_t packet_data_len = 0; |
1495 | ssize_t read_len; | |
d3e2ba59 JD |
1496 | |
1497 | DBG2("Relay get data packet"); | |
1498 | ||
eea7556c | 1499 | health_code_update(); |
2f8f53af | 1500 | |
7591bab1 MD |
1501 | ret = recv_request(conn->sock, &get_packet_info, |
1502 | sizeof(get_packet_info)); | |
2f8f53af | 1503 | if (ret < 0) { |
d3e2ba59 JD |
1504 | goto end; |
1505 | } | |
eea7556c | 1506 | health_code_update(); |
d3e2ba59 | 1507 | |
0233a6a5 | 1508 | /* From this point on, the error label can be reached. */ |
553b2adb | 1509 | memset(&reply_header, 0, sizeof(reply_header)); |
0233a6a5 | 1510 | |
7591bab1 MD |
1511 | vstream = viewer_stream_get_by_id(be64toh(get_packet_info.stream_id)); |
1512 | if (!vstream) { | |
a44ca2ca | 1513 | DBG("Client requested packet of unknown stream id %" PRIu64, |
9b9f9f94 | 1514 | (uint64_t) be64toh(get_packet_info.stream_id)); |
553b2adb JG |
1515 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1516 | goto send_reply_nolock; | |
b6025e94 JR |
1517 | } else { |
1518 | packet_data_len = be32toh(get_packet_info.len); | |
553b2adb | 1519 | reply_size += packet_data_len; |
d3e2ba59 | 1520 | } |
2a174661 | 1521 | |
553b2adb JG |
1522 | reply = zmalloc(reply_size); |
1523 | if (!reply) { | |
1524 | PERROR("packet reply zmalloc"); | |
1525 | reply_size = sizeof(reply_header); | |
d3e2ba59 JD |
1526 | goto error; |
1527 | } | |
1528 | ||
b6025e94 | 1529 | pthread_mutex_lock(&vstream->stream->lock); |
a5df8828 | 1530 | lseek_ret = lseek(vstream->stream_fd->fd, be64toh(get_packet_info.offset), |
7591bab1 | 1531 | SEEK_SET); |
a5df8828 | 1532 | if (lseek_ret < 0) { |
7591bab1 | 1533 | PERROR("lseek fd %d to offset %" PRIu64, vstream->stream_fd->fd, |
9b9f9f94 | 1534 | (uint64_t) be64toh(get_packet_info.offset)); |
7591bab1 | 1535 | goto error; |
d3e2ba59 | 1536 | } |
b6025e94 | 1537 | read_len = lttng_read(vstream->stream_fd->fd, |
553b2adb | 1538 | reply + sizeof(reply_header), |
b6025e94 JR |
1539 | packet_data_len); |
1540 | if (read_len < packet_data_len) { | |
7591bab1 MD |
1541 | PERROR("Relay reading trace file, fd: %d, offset: %" PRIu64, |
1542 | vstream->stream_fd->fd, | |
9b9f9f94 | 1543 | (uint64_t) be64toh(get_packet_info.offset)); |
7591bab1 | 1544 | goto error; |
d3e2ba59 | 1545 | } |
553b2adb JG |
1546 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
1547 | reply_header.len = htobe32(packet_data_len); | |
d3e2ba59 JD |
1548 | goto send_reply; |
1549 | ||
1550 | error: | |
553b2adb | 1551 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1552 | |
1553 | send_reply: | |
7591bab1 MD |
1554 | if (vstream) { |
1555 | pthread_mutex_unlock(&vstream->stream->lock); | |
1556 | } | |
1557 | send_reply_nolock: | |
eea7556c MD |
1558 | |
1559 | health_code_update(); | |
2f8f53af | 1560 | |
553b2adb JG |
1561 | if (reply) { |
1562 | memcpy(reply, &reply_header, sizeof(reply_header)); | |
1563 | ret = send_response(conn->sock, reply, reply_size); | |
1564 | } else { | |
1565 | /* No reply to send. */ | |
1566 | ret = send_response(conn->sock, &reply_header, | |
1567 | reply_size); | |
1568 | } | |
1569 | ||
b6025e94 | 1570 | health_code_update(); |
d3e2ba59 | 1571 | if (ret < 0) { |
b6025e94 | 1572 | PERROR("sendmsg of packet data failed"); |
7591bab1 | 1573 | goto end_free; |
d3e2ba59 | 1574 | } |
d3e2ba59 | 1575 | |
553b2adb | 1576 | DBG("Sent %u bytes for stream %" PRIu64, reply_size, |
9b9f9f94 | 1577 | (uint64_t) be64toh(get_packet_info.stream_id)); |
d3e2ba59 | 1578 | |
7591bab1 | 1579 | end_free: |
553b2adb | 1580 | free(reply); |
d3e2ba59 | 1581 | end: |
7591bab1 MD |
1582 | if (vstream) { |
1583 | viewer_stream_put(vstream); | |
1584 | } | |
d3e2ba59 JD |
1585 | return ret; |
1586 | } | |
1587 | ||
1588 | /* | |
1589 | * Send the session's metadata | |
1590 | * | |
1591 | * Return 0 on success else a negative value. | |
1592 | */ | |
1593 | static | |
58eb9381 | 1594 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1595 | { |
1596 | int ret = 0; | |
1597 | ssize_t read_len; | |
1598 | uint64_t len = 0; | |
1599 | char *data = NULL; | |
1600 | struct lttng_viewer_get_metadata request; | |
1601 | struct lttng_viewer_metadata_packet reply; | |
7591bab1 | 1602 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1603 | |
58eb9381 | 1604 | assert(conn); |
d3e2ba59 JD |
1605 | |
1606 | DBG("Relay get metadata"); | |
1607 | ||
eea7556c | 1608 | health_code_update(); |
2f8f53af | 1609 | |
58eb9381 | 1610 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1611 | if (ret < 0) { |
d3e2ba59 JD |
1612 | goto end; |
1613 | } | |
eea7556c | 1614 | health_code_update(); |
d3e2ba59 | 1615 | |
53efb85a MD |
1616 | memset(&reply, 0, sizeof(reply)); |
1617 | ||
7591bab1 MD |
1618 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1619 | if (!vstream) { | |
3b463131 MD |
1620 | /* |
1621 | * The metadata stream can be closed by a CLOSE command | |
1622 | * just before we attach. It can also be closed by | |
1623 | * per-pid tracing during tracing. Therefore, it is | |
1624 | * possible that we cannot find this viewer stream. | |
1625 | * Reply back to the client with an error if we cannot | |
1626 | * find it. | |
1627 | */ | |
a44ca2ca | 1628 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
9b9f9f94 | 1629 | (uint64_t) be64toh(request.stream_id)); |
3b463131 | 1630 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
7591bab1 | 1631 | goto send_reply; |
d3e2ba59 | 1632 | } |
7591bab1 MD |
1633 | pthread_mutex_lock(&vstream->stream->lock); |
1634 | if (!vstream->stream->is_metadata) { | |
1635 | ERR("Invalid metadata stream"); | |
6763619c JD |
1636 | goto error; |
1637 | } | |
1638 | ||
7591bab1 | 1639 | assert(vstream->metadata_sent <= vstream->stream->metadata_received); |
2a174661 | 1640 | |
7591bab1 | 1641 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
d3e2ba59 | 1642 | if (len == 0) { |
c4e361a4 | 1643 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
d3e2ba59 JD |
1644 | goto send_reply; |
1645 | } | |
1646 | ||
1647 | /* first time, we open the metadata file */ | |
7591bab1 | 1648 | if (!vstream->stream_fd) { |
d3e2ba59 JD |
1649 | char fullpath[PATH_MAX]; |
1650 | ||
7591bab1 MD |
1651 | ret = snprintf(fullpath, PATH_MAX, "%s/%s", vstream->path_name, |
1652 | vstream->channel_name); | |
d3e2ba59 JD |
1653 | if (ret < 0) { |
1654 | goto error; | |
1655 | } | |
1656 | ret = open(fullpath, O_RDONLY); | |
1657 | if (ret < 0) { | |
1658 | PERROR("Relay opening metadata file"); | |
1659 | goto error; | |
1660 | } | |
7591bab1 MD |
1661 | vstream->stream_fd = stream_fd_create(ret); |
1662 | if (!vstream->stream_fd) { | |
1663 | if (close(ret)) { | |
1664 | PERROR("close"); | |
1665 | } | |
1666 | goto error; | |
1667 | } | |
d3e2ba59 JD |
1668 | } |
1669 | ||
1670 | reply.len = htobe64(len); | |
1671 | data = zmalloc(len); | |
1672 | if (!data) { | |
1673 | PERROR("viewer metadata zmalloc"); | |
1674 | goto error; | |
1675 | } | |
1676 | ||
7591bab1 | 1677 | read_len = lttng_read(vstream->stream_fd->fd, data, len); |
6cd525e8 | 1678 | if (read_len < len) { |
d3e2ba59 JD |
1679 | PERROR("Relay reading metadata file"); |
1680 | goto error; | |
1681 | } | |
7591bab1 MD |
1682 | vstream->metadata_sent += read_len; |
1683 | if (vstream->metadata_sent == vstream->stream->metadata_received | |
1684 | && vstream->stream->closed) { | |
1685 | /* Release ownership for the viewer metadata stream. */ | |
1686 | viewer_stream_put(vstream); | |
1687 | } | |
1688 | ||
c4e361a4 | 1689 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
7591bab1 | 1690 | |
d3e2ba59 JD |
1691 | goto send_reply; |
1692 | ||
1693 | error: | |
c4e361a4 | 1694 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1695 | |
1696 | send_reply: | |
eea7556c | 1697 | health_code_update(); |
7591bab1 MD |
1698 | if (vstream) { |
1699 | pthread_mutex_unlock(&vstream->stream->lock); | |
1700 | } | |
58eb9381 | 1701 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 1702 | if (ret < 0) { |
7591bab1 | 1703 | goto end_free; |
d3e2ba59 | 1704 | } |
eea7556c | 1705 | health_code_update(); |
d3e2ba59 JD |
1706 | |
1707 | if (len > 0) { | |
58eb9381 | 1708 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 1709 | if (ret < 0) { |
7591bab1 | 1710 | goto end_free; |
d3e2ba59 JD |
1711 | } |
1712 | } | |
1713 | ||
1714 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
9b9f9f94 | 1715 | (uint64_t) be64toh(request.stream_id)); |
d3e2ba59 JD |
1716 | |
1717 | DBG("Metadata sent"); | |
1718 | ||
7591bab1 | 1719 | end_free: |
d3e2ba59 | 1720 | free(data); |
d3e2ba59 | 1721 | end: |
7591bab1 MD |
1722 | if (vstream) { |
1723 | viewer_stream_put(vstream); | |
1724 | } | |
d3e2ba59 JD |
1725 | return ret; |
1726 | } | |
1727 | ||
c3b7390b JD |
1728 | /* |
1729 | * Create a viewer session. | |
1730 | * | |
1731 | * Return 0 on success or else a negative value. | |
1732 | */ | |
1733 | static | |
1734 | int viewer_create_session(struct relay_connection *conn) | |
1735 | { | |
1736 | int ret; | |
1737 | struct lttng_viewer_create_session_response resp; | |
1738 | ||
1739 | DBG("Viewer create session received"); | |
1740 | ||
53efb85a | 1741 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 1742 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
7591bab1 | 1743 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
1744 | if (!conn->viewer_session) { |
1745 | ERR("Allocation viewer session"); | |
1746 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
1747 | goto send_reply; | |
1748 | } | |
c3b7390b JD |
1749 | |
1750 | send_reply: | |
1751 | health_code_update(); | |
1752 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
1753 | if (ret < 0) { | |
1754 | goto end; | |
1755 | } | |
1756 | health_code_update(); | |
1757 | ret = 0; | |
1758 | ||
1759 | end: | |
1760 | return ret; | |
1761 | } | |
1762 | ||
d62023be JD |
1763 | /* |
1764 | * Detach a viewer session. | |
1765 | * | |
1766 | * Return 0 on success or else a negative value. | |
1767 | */ | |
1768 | static | |
1769 | int viewer_detach_session(struct relay_connection *conn) | |
1770 | { | |
1771 | int ret; | |
1772 | struct lttng_viewer_detach_session_response response; | |
1773 | struct lttng_viewer_detach_session_request request; | |
1774 | struct relay_session *session = NULL; | |
1775 | uint64_t viewer_session_to_close; | |
1776 | ||
1777 | DBG("Viewer detach session received"); | |
1778 | ||
1779 | assert(conn); | |
1780 | ||
1781 | health_code_update(); | |
1782 | ||
1783 | /* Receive the request from the connected client. */ | |
1784 | ret = recv_request(conn->sock, &request, sizeof(request)); | |
1785 | if (ret < 0) { | |
1786 | goto end; | |
1787 | } | |
1788 | viewer_session_to_close = be64toh(request.session_id); | |
1789 | ||
1790 | if (!conn->viewer_session) { | |
1791 | DBG("Client trying to detach before creating a live viewer session"); | |
1792 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
1793 | goto send_reply; | |
1794 | } | |
1795 | ||
1796 | health_code_update(); | |
1797 | ||
1798 | memset(&response, 0, sizeof(response)); | |
1799 | DBG("Detaching from session ID %" PRIu64, viewer_session_to_close); | |
1800 | ||
1801 | session = session_get_by_id(be64toh(request.session_id)); | |
1802 | if (!session) { | |
1803 | DBG("Relay session %" PRIu64 " not found", | |
9b9f9f94 | 1804 | (uint64_t) be64toh(request.session_id)); |
d62023be JD |
1805 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_UNK); |
1806 | goto send_reply; | |
1807 | } | |
1808 | ||
1809 | ret = viewer_session_is_attached(conn->viewer_session, session); | |
1810 | if (ret != 1) { | |
1811 | DBG("Not attached to this session"); | |
1812 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
1813 | goto send_reply_put; | |
1814 | } | |
1815 | ||
1816 | viewer_session_close_one_session(conn->viewer_session, session); | |
1817 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_OK); | |
1818 | DBG("Session %" PRIu64 " detached.", viewer_session_to_close); | |
1819 | ||
1820 | send_reply_put: | |
1821 | session_put(session); | |
1822 | ||
1823 | send_reply: | |
1824 | health_code_update(); | |
1825 | ret = send_response(conn->sock, &response, sizeof(response)); | |
1826 | if (ret < 0) { | |
1827 | goto end; | |
1828 | } | |
1829 | health_code_update(); | |
1830 | ret = 0; | |
1831 | ||
1832 | end: | |
1833 | return ret; | |
1834 | } | |
c3b7390b | 1835 | |
d3e2ba59 JD |
1836 | /* |
1837 | * live_relay_unknown_command: send -1 if received unknown command | |
1838 | */ | |
1839 | static | |
58eb9381 | 1840 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
1841 | { |
1842 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 1843 | |
53efb85a | 1844 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 1845 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1846 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
1847 | } |
1848 | ||
1849 | /* | |
1850 | * Process the commands received on the control socket | |
1851 | */ | |
1852 | static | |
1853 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 1854 | struct relay_connection *conn) |
d3e2ba59 JD |
1855 | { |
1856 | int ret = 0; | |
2f8f53af DG |
1857 | uint32_t msg_value; |
1858 | ||
2f8f53af DG |
1859 | msg_value = be32toh(recv_hdr->cmd); |
1860 | ||
1861 | /* | |
1862 | * Make sure we've done the version check before any command other then a | |
1863 | * new client connection. | |
1864 | */ | |
c4e361a4 | 1865 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 1866 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
1867 | ret = -1; |
1868 | goto end; | |
1869 | } | |
d3e2ba59 | 1870 | |
2f8f53af | 1871 | switch (msg_value) { |
c4e361a4 | 1872 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 1873 | ret = viewer_connect(conn); |
d3e2ba59 | 1874 | break; |
c4e361a4 | 1875 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 1876 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 1877 | break; |
c4e361a4 | 1878 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 1879 | ret = viewer_attach_session(conn); |
d3e2ba59 | 1880 | break; |
c4e361a4 | 1881 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 1882 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 1883 | break; |
c4e361a4 | 1884 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 1885 | ret = viewer_get_packet(conn); |
d3e2ba59 | 1886 | break; |
c4e361a4 | 1887 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 1888 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 1889 | break; |
c4e361a4 | 1890 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 1891 | ret = viewer_get_new_streams(conn); |
80e8027a | 1892 | break; |
c3b7390b JD |
1893 | case LTTNG_VIEWER_CREATE_SESSION: |
1894 | ret = viewer_create_session(conn); | |
1895 | break; | |
d62023be JD |
1896 | case LTTNG_VIEWER_DETACH_SESSION: |
1897 | ret = viewer_detach_session(conn); | |
1898 | break; | |
d3e2ba59 | 1899 | default: |
7591bab1 MD |
1900 | ERR("Received unknown viewer command (%u)", |
1901 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 1902 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
1903 | ret = -1; |
1904 | goto end; | |
1905 | } | |
1906 | ||
1907 | end: | |
1908 | return ret; | |
1909 | } | |
1910 | ||
1911 | static | |
58eb9381 | 1912 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
1913 | { |
1914 | int ret; | |
1915 | ||
58eb9381 | 1916 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 JD |
1917 | |
1918 | ret = close(pollfd); | |
1919 | if (ret < 0) { | |
1920 | ERR("Closing pollfd %d", pollfd); | |
1921 | } | |
1922 | } | |
1923 | ||
d3e2ba59 JD |
1924 | /* |
1925 | * This thread does the actual work | |
1926 | */ | |
1927 | static | |
1928 | void *thread_worker(void *data) | |
1929 | { | |
1930 | int ret, err = -1; | |
1931 | uint32_t nb_fd; | |
d3e2ba59 | 1932 | struct lttng_poll_event events; |
7591bab1 | 1933 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
1934 | struct lttng_ht_iter iter; |
1935 | struct lttng_viewer_cmd recv_hdr; | |
302d8906 | 1936 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
1937 | |
1938 | DBG("[thread] Live viewer relay worker started"); | |
1939 | ||
1940 | rcu_register_thread(); | |
1941 | ||
eea7556c MD |
1942 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
1943 | ||
9b5e0863 MD |
1944 | if (testpoint(relayd_thread_live_worker)) { |
1945 | goto error_testpoint; | |
1946 | } | |
1947 | ||
d3e2ba59 | 1948 | /* table of connections indexed on socket */ |
7591bab1 MD |
1949 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1950 | if (!viewer_connections_ht) { | |
1951 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
1952 | } |
1953 | ||
4f89b9d2 JG |
1954 | ret = create_named_thread_poll_set(&events, 2, |
1955 | "Live viewer worker thread epoll"); | |
d3e2ba59 JD |
1956 | if (ret < 0) { |
1957 | goto error_poll_create; | |
1958 | } | |
1959 | ||
58eb9381 | 1960 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
1961 | if (ret < 0) { |
1962 | goto error; | |
1963 | } | |
1964 | ||
1965 | restart: | |
1966 | while (1) { | |
1967 | int i; | |
1968 | ||
eea7556c MD |
1969 | health_code_update(); |
1970 | ||
d3e2ba59 JD |
1971 | /* Infinite blocking call, waiting for transmission */ |
1972 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 1973 | health_poll_entry(); |
d3e2ba59 | 1974 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 1975 | health_poll_exit(); |
d3e2ba59 JD |
1976 | if (ret < 0) { |
1977 | /* | |
1978 | * Restart interrupted system call. | |
1979 | */ | |
1980 | if (errno == EINTR) { | |
1981 | goto restart; | |
1982 | } | |
1983 | goto error; | |
1984 | } | |
1985 | ||
1986 | nb_fd = ret; | |
1987 | ||
1988 | /* | |
1989 | * Process control. The control connection is prioritised so we don't | |
1990 | * starve it with high throughput tracing data on the data | |
1991 | * connection. | |
1992 | */ | |
1993 | for (i = 0; i < nb_fd; i++) { | |
1994 | /* Fetch once the poll data */ | |
1995 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1996 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1997 | ||
eea7556c MD |
1998 | health_code_update(); |
1999 | ||
fd20dac9 MD |
2000 | if (!revents) { |
2001 | /* No activity for this FD (poll implementation). */ | |
2002 | continue; | |
2003 | } | |
2004 | ||
d3e2ba59 | 2005 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 2006 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
2007 | if (ret) { |
2008 | err = 0; | |
2009 | goto exit; | |
2010 | } | |
2011 | ||
7591bab1 | 2012 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 2013 | if (pollfd == live_conn_pipe[0]) { |
03e43155 | 2014 | if (revents & LPOLLIN) { |
302d8906 JG |
2015 | struct relay_connection *conn; |
2016 | ||
7591bab1 MD |
2017 | ret = lttng_read(live_conn_pipe[0], |
2018 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
2019 | if (ret < 0) { |
2020 | goto error; | |
2021 | } | |
58eb9381 DG |
2022 | lttng_poll_add(&events, conn->sock->fd, |
2023 | LPOLLIN | LPOLLRDHUP); | |
7591bab1 MD |
2024 | connection_ht_add(viewer_connections_ht, conn); |
2025 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
03e43155 MD |
2026 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2027 | ERR("Relay live pipe error"); | |
2028 | goto error; | |
2029 | } else { | |
2030 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2031 | goto error; | |
d3e2ba59 | 2032 | } |
58eb9381 | 2033 | } else { |
7591bab1 | 2034 | /* Connection activity. */ |
302d8906 JG |
2035 | struct relay_connection *conn; |
2036 | ||
7591bab1 MD |
2037 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
2038 | if (!conn) { | |
2039 | continue; | |
2040 | } | |
58eb9381 | 2041 | |
03e43155 | 2042 | if (revents & LPOLLIN) { |
58eb9381 DG |
2043 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
2044 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 2045 | if (ret <= 0) { |
7591bab1 | 2046 | /* Connection closed. */ |
58eb9381 | 2047 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2048 | /* Put "create" ownership reference. */ |
2049 | connection_put(conn); | |
58eb9381 | 2050 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 2051 | } else { |
58eb9381 | 2052 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
2053 | if (ret < 0) { |
2054 | /* Clear the session on error. */ | |
58eb9381 | 2055 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2056 | /* Put "create" ownership reference. */ |
2057 | connection_put(conn); | |
d3e2ba59 JD |
2058 | DBG("Viewer connection closed with %d", pollfd); |
2059 | } | |
2060 | } | |
03e43155 MD |
2061 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2062 | cleanup_connection_pollfd(&events, pollfd); | |
2063 | /* Put "create" ownership reference. */ | |
2064 | connection_put(conn); | |
2065 | } else { | |
2066 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2067 | connection_put(conn); | |
2068 | goto error; | |
d3e2ba59 | 2069 | } |
7591bab1 MD |
2070 | /* Put local "get_by_sock" reference. */ |
2071 | connection_put(conn); | |
d3e2ba59 JD |
2072 | } |
2073 | } | |
2074 | } | |
2075 | ||
2076 | exit: | |
2077 | error: | |
4f89b9d2 | 2078 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 | 2079 | |
71efa8ef | 2080 | /* Cleanup remaining connection object. */ |
d3e2ba59 | 2081 | rcu_read_lock(); |
7591bab1 | 2082 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
302d8906 | 2083 | destroy_conn, |
58eb9381 | 2084 | sock_n.node) { |
eea7556c | 2085 | health_code_update(); |
7591bab1 | 2086 | connection_put(destroy_conn); |
d3e2ba59 JD |
2087 | } |
2088 | rcu_read_unlock(); | |
2089 | error_poll_create: | |
7591bab1 MD |
2090 | lttng_ht_destroy(viewer_connections_ht); |
2091 | viewer_connections_ht_error: | |
58eb9381 | 2092 | /* Close relay conn pipes */ |
e702232b | 2093 | (void) fd_tracker_util_pipe_close(the_fd_tracker, live_conn_pipe); |
d3e2ba59 JD |
2094 | if (err) { |
2095 | DBG("Viewer worker thread exited with error"); | |
2096 | } | |
2097 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2098 | error_testpoint: |
eea7556c MD |
2099 | if (err) { |
2100 | health_error(); | |
2101 | ERR("Health error occurred in %s", __func__); | |
2102 | } | |
2103 | health_unregister(health_relayd); | |
b4aacfdc MD |
2104 | if (lttng_relay_stop_threads()) { |
2105 | ERR("Error stopping threads"); | |
178a0557 | 2106 | } |
d3e2ba59 JD |
2107 | rcu_unregister_thread(); |
2108 | return NULL; | |
2109 | } | |
2110 | ||
2111 | /* | |
2112 | * Create the relay command pipe to wake thread_manage_apps. | |
2113 | * Closed in cleanup(). | |
2114 | */ | |
58eb9381 | 2115 | static int create_conn_pipe(void) |
d3e2ba59 | 2116 | { |
e702232b JG |
2117 | return fd_tracker_util_pipe_open_cloexec(the_fd_tracker, |
2118 | "Live connection pipe", live_conn_pipe); | |
178a0557 | 2119 | } |
d3e2ba59 | 2120 | |
178a0557 | 2121 | int relayd_live_join(void) |
d3e2ba59 | 2122 | { |
178a0557 | 2123 | int ret, retval = 0; |
d3e2ba59 JD |
2124 | void *status; |
2125 | ||
d3e2ba59 | 2126 | ret = pthread_join(live_listener_thread, &status); |
178a0557 MD |
2127 | if (ret) { |
2128 | errno = ret; | |
d3e2ba59 | 2129 | PERROR("pthread_join live listener"); |
178a0557 | 2130 | retval = -1; |
d3e2ba59 JD |
2131 | } |
2132 | ||
2133 | ret = pthread_join(live_worker_thread, &status); | |
178a0557 MD |
2134 | if (ret) { |
2135 | errno = ret; | |
d3e2ba59 | 2136 | PERROR("pthread_join live worker"); |
178a0557 | 2137 | retval = -1; |
d3e2ba59 JD |
2138 | } |
2139 | ||
2140 | ret = pthread_join(live_dispatcher_thread, &status); | |
178a0557 MD |
2141 | if (ret) { |
2142 | errno = ret; | |
d3e2ba59 | 2143 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2144 | retval = -1; |
d3e2ba59 JD |
2145 | } |
2146 | ||
178a0557 | 2147 | cleanup_relayd_live(); |
d3e2ba59 | 2148 | |
178a0557 | 2149 | return retval; |
d3e2ba59 JD |
2150 | } |
2151 | ||
2152 | /* | |
2153 | * main | |
2154 | */ | |
7591bab1 | 2155 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2156 | { |
178a0557 | 2157 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2158 | void *status; |
2159 | int is_root; | |
2160 | ||
178a0557 MD |
2161 | if (!uri) { |
2162 | retval = -1; | |
2163 | goto exit_init_data; | |
2164 | } | |
d3e2ba59 JD |
2165 | live_uri = uri; |
2166 | ||
d3e2ba59 JD |
2167 | /* Check if daemon is UID = 0 */ |
2168 | is_root = !getuid(); | |
2169 | ||
2170 | if (!is_root) { | |
2171 | if (live_uri->port < 1024) { | |
2172 | ERR("Need to be root to use ports < 1024"); | |
178a0557 MD |
2173 | retval = -1; |
2174 | goto exit_init_data; | |
d3e2ba59 JD |
2175 | } |
2176 | } | |
2177 | ||
2178 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2179 | if (create_conn_pipe()) { |
2180 | retval = -1; | |
2181 | goto exit_init_data; | |
d3e2ba59 JD |
2182 | } |
2183 | ||
2184 | /* Init relay command queue. */ | |
8bdee6e2 | 2185 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2186 | |
2187 | /* Set up max poll set size */ | |
25b397f9 MD |
2188 | if (lttng_poll_set_max_size()) { |
2189 | retval = -1; | |
2190 | goto exit_init_data; | |
2191 | } | |
d3e2ba59 JD |
2192 | |
2193 | /* Setup the dispatcher thread */ | |
1a1a34b4 | 2194 | ret = pthread_create(&live_dispatcher_thread, default_pthread_attr(), |
d3e2ba59 | 2195 | thread_dispatcher, (void *) NULL); |
178a0557 MD |
2196 | if (ret) { |
2197 | errno = ret; | |
d3e2ba59 | 2198 | PERROR("pthread_create viewer dispatcher"); |
178a0557 MD |
2199 | retval = -1; |
2200 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2201 | } |
2202 | ||
2203 | /* Setup the worker thread */ | |
1a1a34b4 | 2204 | ret = pthread_create(&live_worker_thread, default_pthread_attr(), |
7591bab1 | 2205 | thread_worker, NULL); |
178a0557 MD |
2206 | if (ret) { |
2207 | errno = ret; | |
d3e2ba59 | 2208 | PERROR("pthread_create viewer worker"); |
178a0557 MD |
2209 | retval = -1; |
2210 | goto exit_worker_thread; | |
d3e2ba59 JD |
2211 | } |
2212 | ||
2213 | /* Setup the listener thread */ | |
1a1a34b4 | 2214 | ret = pthread_create(&live_listener_thread, default_pthread_attr(), |
d3e2ba59 | 2215 | thread_listener, (void *) NULL); |
178a0557 MD |
2216 | if (ret) { |
2217 | errno = ret; | |
d3e2ba59 | 2218 | PERROR("pthread_create viewer listener"); |
178a0557 MD |
2219 | retval = -1; |
2220 | goto exit_listener_thread; | |
d3e2ba59 JD |
2221 | } |
2222 | ||
178a0557 MD |
2223 | /* |
2224 | * All OK, started all threads. | |
2225 | */ | |
2226 | return retval; | |
2227 | ||
9911d21b JG |
2228 | /* |
2229 | * Join on the live_listener_thread should anything be added after | |
2230 | * the live_listener thread's creation. | |
2231 | */ | |
d3e2ba59 | 2232 | |
178a0557 | 2233 | exit_listener_thread: |
d3e2ba59 | 2234 | |
d3e2ba59 | 2235 | ret = pthread_join(live_worker_thread, &status); |
178a0557 MD |
2236 | if (ret) { |
2237 | errno = ret; | |
d3e2ba59 | 2238 | PERROR("pthread_join live worker"); |
178a0557 | 2239 | retval = -1; |
d3e2ba59 | 2240 | } |
178a0557 | 2241 | exit_worker_thread: |
d3e2ba59 | 2242 | |
d3e2ba59 | 2243 | ret = pthread_join(live_dispatcher_thread, &status); |
178a0557 MD |
2244 | if (ret) { |
2245 | errno = ret; | |
d3e2ba59 | 2246 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2247 | retval = -1; |
d3e2ba59 | 2248 | } |
178a0557 | 2249 | exit_dispatcher_thread: |
d3e2ba59 | 2250 | |
178a0557 MD |
2251 | exit_init_data: |
2252 | cleanup_relayd_live(); | |
d3e2ba59 | 2253 | |
178a0557 | 2254 | return retval; |
d3e2ba59 | 2255 | } |