Commit | Line | Data |
---|---|---|
b8aa1682 JD |
1 | /* |
2 | * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <getopt.h> | |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <sys/mman.h> | |
29 | #include <sys/mount.h> | |
30 | #include <sys/resource.h> | |
31 | #include <sys/socket.h> | |
32 | #include <sys/stat.h> | |
33 | #include <sys/types.h> | |
34 | #include <sys/wait.h> | |
173af62f | 35 | #include <inttypes.h> |
b8aa1682 JD |
36 | #include <urcu/futex.h> |
37 | #include <urcu/uatomic.h> | |
38 | #include <unistd.h> | |
39 | #include <fcntl.h> | |
40 | #include <config.h> | |
41 | ||
42 | #include <lttng/lttng.h> | |
43 | #include <common/common.h> | |
44 | #include <common/compat/poll.h> | |
45 | #include <common/compat/socket.h> | |
46 | #include <common/defaults.h> | |
47 | #include <common/futex.h> | |
48 | #include <common/sessiond-comm/sessiond-comm.h> | |
49 | #include <common/sessiond-comm/inet.h> | |
b8aa1682 JD |
50 | #include <common/sessiond-comm/relayd.h> |
51 | #include <common/uri.h> | |
a02de639 | 52 | #include <common/utils.h> |
b8aa1682 | 53 | |
0f907de1 | 54 | #include "cmd.h" |
d3e2ba59 | 55 | #include "ctf-trace.h" |
1c20f0e2 | 56 | #include "index.h" |
0f907de1 | 57 | #include "utils.h" |
b8aa1682 | 58 | #include "lttng-relayd.h" |
d3e2ba59 | 59 | #include "live.h" |
55706a7d | 60 | #include "health-relayd.h" |
b8aa1682 JD |
61 | |
62 | /* command line options */ | |
0f907de1 | 63 | char *opt_output_path; |
b8aa1682 | 64 | static int opt_daemon; |
095a4ae5 MD |
65 | static struct lttng_uri *control_uri; |
66 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 67 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
68 | |
69 | const char *progname; | |
b8aa1682 | 70 | |
65931c8b MD |
71 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
72 | ||
b8aa1682 JD |
73 | /* |
74 | * Quit pipe for all threads. This permits a single cancellation point | |
75 | * for all threads when receiving an event on the pipe. | |
76 | */ | |
77 | static int thread_quit_pipe[2] = { -1, -1 }; | |
78 | ||
79 | /* | |
80 | * This pipe is used to inform the worker thread that a command is queued and | |
81 | * ready to be processed. | |
82 | */ | |
83 | static int relay_cmd_pipe[2] = { -1, -1 }; | |
84 | ||
26c9d55e | 85 | /* Shared between threads */ |
b8aa1682 JD |
86 | static int dispatch_thread_exit; |
87 | ||
88 | static pthread_t listener_thread; | |
89 | static pthread_t dispatcher_thread; | |
90 | static pthread_t worker_thread; | |
65931c8b | 91 | static pthread_t health_thread; |
b8aa1682 | 92 | |
095a4ae5 MD |
93 | static uint64_t last_relay_stream_id; |
94 | static uint64_t last_relay_session_id; | |
b8aa1682 JD |
95 | |
96 | /* | |
97 | * Relay command queue. | |
98 | * | |
99 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
100 | * queue. | |
101 | */ | |
102 | static struct relay_cmd_queue relay_cmd_queue; | |
103 | ||
104 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
105 | static char *data_buffer; |
106 | static unsigned int data_buffer_size; | |
b8aa1682 | 107 | |
1c20f0e2 JD |
108 | /* We need those values for the file/dir creation. */ |
109 | static uid_t relayd_uid; | |
110 | static gid_t relayd_gid; | |
111 | ||
d3e2ba59 JD |
112 | /* Global relay stream hash table. */ |
113 | struct lttng_ht *relay_streams_ht; | |
114 | ||
92c6ca54 DG |
115 | /* Global relay viewer stream hash table. */ |
116 | struct lttng_ht *viewer_streams_ht; | |
117 | ||
0a6518b0 DG |
118 | /* Global hash table that stores relay index object. */ |
119 | struct lttng_ht *indexes_ht; | |
120 | ||
55706a7d | 121 | /* Relayd health monitoring */ |
eea7556c | 122 | struct health_app *health_relayd; |
55706a7d | 123 | |
b8aa1682 JD |
124 | /* |
125 | * usage function on stderr | |
126 | */ | |
127 | static | |
128 | void usage(void) | |
129 | { | |
130 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); | |
994fa64f DG |
131 | fprintf(stderr, " -h, --help Display this usage.\n"); |
132 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
133 | fprintf(stderr, " -C, --control-port URL Control port listening.\n"); | |
134 | fprintf(stderr, " -D, --data-port URL Data port listening.\n"); | |
135 | fprintf(stderr, " -o, --output PATH Output path for traces. Must use an absolute path.\n"); | |
136 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
65931c8b | 137 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
b8aa1682 JD |
138 | } |
139 | ||
140 | static | |
141 | int parse_args(int argc, char **argv) | |
142 | { | |
143 | int c; | |
144 | int ret = 0; | |
145 | char *default_address; | |
146 | ||
147 | static struct option long_options[] = { | |
e3678fd8 MD |
148 | { "control-port", 1, 0, 'C', }, |
149 | { "data-port", 1, 0, 'D', }, | |
150 | { "daemonize", 0, 0, 'd', }, | |
65931c8b | 151 | { "group", 1, 0, 'g', }, |
e3678fd8 MD |
152 | { "help", 0, 0, 'h', }, |
153 | { "output", 1, 0, 'o', }, | |
154 | { "verbose", 0, 0, 'v', }, | |
095a4ae5 | 155 | { NULL, 0, 0, 0, }, |
b8aa1682 JD |
156 | }; |
157 | ||
158 | while (1) { | |
159 | int option_index = 0; | |
65931c8b | 160 | c = getopt_long(argc, argv, "dhv" "C:D:o:g:", |
b8aa1682 JD |
161 | long_options, &option_index); |
162 | if (c == -1) { | |
163 | break; | |
164 | } | |
165 | ||
166 | switch (c) { | |
167 | case 0: | |
168 | fprintf(stderr, "option %s", long_options[option_index].name); | |
169 | if (optarg) { | |
170 | fprintf(stderr, " with arg %s\n", optarg); | |
171 | } | |
172 | break; | |
173 | case 'C': | |
174 | ret = uri_parse(optarg, &control_uri); | |
175 | if (ret < 0) { | |
176 | ERR("Invalid control URI specified"); | |
177 | goto exit; | |
178 | } | |
179 | if (control_uri->port == 0) { | |
180 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
181 | } | |
182 | break; | |
183 | case 'D': | |
184 | ret = uri_parse(optarg, &data_uri); | |
185 | if (ret < 0) { | |
186 | ERR("Invalid data URI specified"); | |
187 | goto exit; | |
188 | } | |
189 | if (data_uri->port == 0) { | |
190 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
191 | } | |
192 | break; | |
193 | case 'd': | |
194 | opt_daemon = 1; | |
195 | break; | |
65931c8b MD |
196 | case 'g': |
197 | tracing_group_name = optarg; | |
198 | break; | |
b8aa1682 JD |
199 | case 'h': |
200 | usage(); | |
201 | exit(EXIT_FAILURE); | |
202 | case 'o': | |
203 | ret = asprintf(&opt_output_path, "%s", optarg); | |
204 | if (ret < 0) { | |
205 | PERROR("asprintf opt_output_path"); | |
206 | goto exit; | |
207 | } | |
208 | break; | |
209 | case 'v': | |
210 | /* Verbose level can increase using multiple -v */ | |
211 | lttng_opt_verbose += 1; | |
212 | break; | |
213 | default: | |
214 | /* Unknown option or other error. | |
215 | * Error is printed by getopt, just return */ | |
216 | ret = -1; | |
217 | goto exit; | |
218 | } | |
219 | } | |
220 | ||
221 | /* assign default values */ | |
222 | if (control_uri == NULL) { | |
223 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
224 | DEFAULT_NETWORK_CONTROL_PORT); | |
225 | if (ret < 0) { | |
226 | PERROR("asprintf default data address"); | |
227 | goto exit; | |
228 | } | |
229 | ||
230 | ret = uri_parse(default_address, &control_uri); | |
231 | free(default_address); | |
232 | if (ret < 0) { | |
233 | ERR("Invalid control URI specified"); | |
234 | goto exit; | |
235 | } | |
236 | } | |
237 | if (data_uri == NULL) { | |
238 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
239 | DEFAULT_NETWORK_DATA_PORT); | |
240 | if (ret < 0) { | |
241 | PERROR("asprintf default data address"); | |
242 | goto exit; | |
243 | } | |
244 | ||
245 | ret = uri_parse(default_address, &data_uri); | |
246 | free(default_address); | |
247 | if (ret < 0) { | |
248 | ERR("Invalid data URI specified"); | |
249 | goto exit; | |
250 | } | |
251 | } | |
d3e2ba59 JD |
252 | if (live_uri == NULL) { |
253 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
254 | DEFAULT_NETWORK_VIEWER_PORT); | |
255 | if (ret < 0) { | |
256 | PERROR("asprintf default viewer control address"); | |
257 | goto exit; | |
258 | } | |
259 | ||
260 | ret = uri_parse(default_address, &live_uri); | |
261 | free(default_address); | |
262 | if (ret < 0) { | |
263 | ERR("Invalid viewer control URI specified"); | |
264 | goto exit; | |
265 | } | |
266 | } | |
b8aa1682 JD |
267 | |
268 | exit: | |
269 | return ret; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Cleanup the daemon | |
274 | */ | |
275 | static | |
276 | void cleanup(void) | |
277 | { | |
b8aa1682 JD |
278 | DBG("Cleaning up"); |
279 | ||
095a4ae5 MD |
280 | /* free the dynamically allocated opt_output_path */ |
281 | free(opt_output_path); | |
282 | ||
a02de639 CB |
283 | /* Close thread quit pipes */ |
284 | utils_close_pipe(thread_quit_pipe); | |
285 | ||
710c1f73 DG |
286 | uri_free(control_uri); |
287 | uri_free(data_uri); | |
b8aa1682 JD |
288 | } |
289 | ||
290 | /* | |
291 | * Write to writable pipe used to notify a thread. | |
292 | */ | |
293 | static | |
294 | int notify_thread_pipe(int wpipe) | |
295 | { | |
296 | int ret; | |
297 | ||
6f94560a MD |
298 | do { |
299 | ret = write(wpipe, "!", 1); | |
300 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 301 | if (ret < 0 || ret != 1) { |
b8aa1682 JD |
302 | PERROR("write poll pipe"); |
303 | } | |
304 | ||
305 | return ret; | |
306 | } | |
307 | ||
65931c8b MD |
308 | static void notify_health_quit_pipe(int *pipe) |
309 | { | |
310 | int ret; | |
311 | ||
312 | do { | |
313 | ret = write(pipe[1], "4", 1); | |
314 | } while (ret < 0 && errno == EINTR); | |
315 | if (ret < 0 || ret != 1) { | |
316 | PERROR("write relay health quit"); | |
317 | } | |
318 | } | |
319 | ||
b8aa1682 JD |
320 | /* |
321 | * Stop all threads by closing the thread quit pipe. | |
322 | */ | |
323 | static | |
324 | void stop_threads(void) | |
325 | { | |
326 | int ret; | |
327 | ||
328 | /* Stopping all threads */ | |
329 | DBG("Terminating all threads"); | |
330 | ret = notify_thread_pipe(thread_quit_pipe[1]); | |
331 | if (ret < 0) { | |
332 | ERR("write error on thread quit pipe"); | |
333 | } | |
334 | ||
65931c8b MD |
335 | notify_health_quit_pipe(health_quit_pipe); |
336 | ||
b8aa1682 | 337 | /* Dispatch thread */ |
26c9d55e | 338 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
b8aa1682 JD |
339 | futex_nto1_wake(&relay_cmd_queue.futex); |
340 | } | |
341 | ||
342 | /* | |
343 | * Signal handler for the daemon | |
344 | * | |
345 | * Simply stop all worker threads, leaving main() return gracefully after | |
346 | * joining all threads and calling cleanup(). | |
347 | */ | |
348 | static | |
349 | void sighandler(int sig) | |
350 | { | |
351 | switch (sig) { | |
352 | case SIGPIPE: | |
353 | DBG("SIGPIPE caught"); | |
354 | return; | |
355 | case SIGINT: | |
356 | DBG("SIGINT caught"); | |
357 | stop_threads(); | |
358 | break; | |
359 | case SIGTERM: | |
360 | DBG("SIGTERM caught"); | |
361 | stop_threads(); | |
362 | break; | |
363 | default: | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
368 | /* | |
369 | * Setup signal handler for : | |
370 | * SIGINT, SIGTERM, SIGPIPE | |
371 | */ | |
372 | static | |
373 | int set_signal_handler(void) | |
374 | { | |
375 | int ret = 0; | |
376 | struct sigaction sa; | |
377 | sigset_t sigset; | |
378 | ||
379 | if ((ret = sigemptyset(&sigset)) < 0) { | |
380 | PERROR("sigemptyset"); | |
381 | return ret; | |
382 | } | |
383 | ||
384 | sa.sa_handler = sighandler; | |
385 | sa.sa_mask = sigset; | |
386 | sa.sa_flags = 0; | |
387 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
388 | PERROR("sigaction"); | |
389 | return ret; | |
390 | } | |
391 | ||
392 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
393 | PERROR("sigaction"); | |
394 | return ret; | |
395 | } | |
396 | ||
397 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
398 | PERROR("sigaction"); | |
399 | return ret; | |
400 | } | |
401 | ||
402 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); | |
403 | ||
404 | return ret; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Init thread quit pipe. | |
409 | * | |
410 | * Return -1 on error or 0 if all pipes are created. | |
411 | */ | |
412 | static | |
413 | int init_thread_quit_pipe(void) | |
414 | { | |
a02de639 | 415 | int ret; |
b8aa1682 | 416 | |
a02de639 | 417 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 418 | |
b8aa1682 JD |
419 | return ret; |
420 | } | |
421 | ||
422 | /* | |
423 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
424 | */ | |
425 | static | |
426 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
427 | { | |
428 | int ret; | |
429 | ||
430 | if (events == NULL || size == 0) { | |
431 | ret = -1; | |
432 | goto error; | |
433 | } | |
434 | ||
435 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
436 | if (ret < 0) { | |
437 | goto error; | |
438 | } | |
439 | ||
440 | /* Add quit pipe */ | |
441 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
442 | if (ret < 0) { | |
443 | goto error; | |
444 | } | |
445 | ||
446 | return 0; | |
447 | ||
448 | error: | |
449 | return ret; | |
450 | } | |
451 | ||
452 | /* | |
453 | * Check if the thread quit pipe was triggered. | |
454 | * | |
455 | * Return 1 if it was triggered else 0; | |
456 | */ | |
457 | static | |
458 | int check_thread_quit_pipe(int fd, uint32_t events) | |
459 | { | |
460 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
461 | return 1; | |
462 | } | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | /* | |
468 | * Create and init socket from uri. | |
469 | */ | |
470 | static | |
471 | struct lttcomm_sock *relay_init_sock(struct lttng_uri *uri) | |
472 | { | |
473 | int ret; | |
474 | struct lttcomm_sock *sock = NULL; | |
475 | ||
476 | sock = lttcomm_alloc_sock_from_uri(uri); | |
477 | if (sock == NULL) { | |
478 | ERR("Allocating socket"); | |
479 | goto error; | |
480 | } | |
481 | ||
482 | ret = lttcomm_create_sock(sock); | |
483 | if (ret < 0) { | |
484 | goto error; | |
485 | } | |
486 | DBG("Listening on sock %d", sock->fd); | |
487 | ||
488 | ret = sock->ops->bind(sock); | |
489 | if (ret < 0) { | |
490 | goto error; | |
491 | } | |
492 | ||
493 | ret = sock->ops->listen(sock, -1); | |
494 | if (ret < 0) { | |
495 | goto error; | |
496 | ||
497 | } | |
498 | ||
499 | return sock; | |
500 | ||
501 | error: | |
502 | if (sock) { | |
503 | lttcomm_destroy_sock(sock); | |
504 | } | |
505 | return NULL; | |
506 | } | |
507 | ||
173af62f DG |
508 | /* |
509 | * Return nonzero if stream needs to be closed. | |
510 | */ | |
511 | static | |
512 | int close_stream_check(struct relay_stream *stream) | |
513 | { | |
514 | ||
515 | if (stream->close_flag && stream->prev_seq == stream->last_net_seq_num) { | |
f7079f67 DG |
516 | /* |
517 | * We are about to close the stream so set the data pending flag to 1 | |
518 | * which will make the end data pending command skip the stream which | |
519 | * is now closed and ready. Note that after proceeding to a file close, | |
520 | * the written file is ready for reading. | |
521 | */ | |
522 | stream->data_pending_check_done = 1; | |
173af62f DG |
523 | return 1; |
524 | } | |
525 | return 0; | |
526 | } | |
527 | ||
b8aa1682 JD |
528 | /* |
529 | * This thread manages the listening for new connections on the network | |
530 | */ | |
531 | static | |
532 | void *relay_thread_listener(void *data) | |
533 | { | |
095a4ae5 | 534 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
535 | int val = 1; |
536 | uint32_t revents, nb_fd; | |
537 | struct lttng_poll_event events; | |
538 | struct lttcomm_sock *control_sock, *data_sock; | |
539 | ||
b8aa1682 JD |
540 | DBG("[thread] Relay listener started"); |
541 | ||
55706a7d MD |
542 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
543 | ||
f385ae0a MD |
544 | health_code_update(); |
545 | ||
b8aa1682 JD |
546 | control_sock = relay_init_sock(control_uri); |
547 | if (!control_sock) { | |
095a4ae5 | 548 | goto error_sock_control; |
b8aa1682 JD |
549 | } |
550 | ||
551 | data_sock = relay_init_sock(data_uri); | |
552 | if (!data_sock) { | |
095a4ae5 | 553 | goto error_sock_relay; |
b8aa1682 JD |
554 | } |
555 | ||
556 | /* | |
557 | * Pass 3 as size here for the thread quit pipe, control and data socket. | |
558 | */ | |
559 | ret = create_thread_poll_set(&events, 3); | |
560 | if (ret < 0) { | |
561 | goto error_create_poll; | |
562 | } | |
563 | ||
564 | /* Add the control socket */ | |
565 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
566 | if (ret < 0) { | |
567 | goto error_poll_add; | |
568 | } | |
569 | ||
570 | /* Add the data socket */ | |
571 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
572 | if (ret < 0) { | |
573 | goto error_poll_add; | |
574 | } | |
575 | ||
576 | while (1) { | |
f385ae0a MD |
577 | health_code_update(); |
578 | ||
b8aa1682 JD |
579 | DBG("Listener accepting connections"); |
580 | ||
b8aa1682 | 581 | restart: |
f385ae0a | 582 | health_poll_entry(); |
b8aa1682 | 583 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 584 | health_poll_exit(); |
b8aa1682 JD |
585 | if (ret < 0) { |
586 | /* | |
587 | * Restart interrupted system call. | |
588 | */ | |
589 | if (errno == EINTR) { | |
590 | goto restart; | |
591 | } | |
592 | goto error; | |
593 | } | |
594 | ||
0d9c5d77 DG |
595 | nb_fd = ret; |
596 | ||
b8aa1682 JD |
597 | DBG("Relay new connection received"); |
598 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
599 | health_code_update(); |
600 | ||
b8aa1682 JD |
601 | /* Fetch once the poll data */ |
602 | revents = LTTNG_POLL_GETEV(&events, i); | |
603 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
604 | ||
605 | /* Thread quit pipe has been closed. Killing thread. */ | |
606 | ret = check_thread_quit_pipe(pollfd, revents); | |
607 | if (ret) { | |
095a4ae5 MD |
608 | err = 0; |
609 | goto exit; | |
b8aa1682 JD |
610 | } |
611 | ||
612 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
613 | ERR("socket poll error"); | |
614 | goto error; | |
615 | } else if (revents & LPOLLIN) { | |
4b7f17b2 MD |
616 | /* |
617 | * Get allocated in this thread, | |
618 | * enqueued to a global queue, dequeued | |
619 | * and freed in the worker thread. | |
620 | */ | |
621 | struct relay_command *relay_cmd; | |
622 | struct lttcomm_sock *newsock; | |
b8aa1682 JD |
623 | |
624 | relay_cmd = zmalloc(sizeof(struct relay_command)); | |
625 | if (relay_cmd == NULL) { | |
626 | PERROR("relay command zmalloc"); | |
627 | goto error; | |
628 | } | |
629 | ||
630 | if (pollfd == data_sock->fd) { | |
631 | newsock = data_sock->ops->accept(data_sock); | |
4b7f17b2 | 632 | if (!newsock) { |
b8aa1682 | 633 | PERROR("accepting data sock"); |
4b7f17b2 | 634 | free(relay_cmd); |
b8aa1682 JD |
635 | goto error; |
636 | } | |
637 | relay_cmd->type = RELAY_DATA; | |
638 | DBG("Relay data connection accepted, socket %d", newsock->fd); | |
4b7f17b2 MD |
639 | } else { |
640 | assert(pollfd == control_sock->fd); | |
b8aa1682 | 641 | newsock = control_sock->ops->accept(control_sock); |
4b7f17b2 | 642 | if (!newsock) { |
b8aa1682 | 643 | PERROR("accepting control sock"); |
4b7f17b2 | 644 | free(relay_cmd); |
b8aa1682 JD |
645 | goto error; |
646 | } | |
647 | relay_cmd->type = RELAY_CONTROL; | |
648 | DBG("Relay control connection accepted, socket %d", newsock->fd); | |
649 | } | |
650 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, | |
651 | &val, sizeof(int)); | |
652 | if (ret < 0) { | |
653 | PERROR("setsockopt inet"); | |
4b7f17b2 MD |
654 | lttcomm_destroy_sock(newsock); |
655 | free(relay_cmd); | |
b8aa1682 JD |
656 | goto error; |
657 | } | |
658 | relay_cmd->sock = newsock; | |
659 | /* | |
660 | * Lock free enqueue the request. | |
661 | */ | |
662 | cds_wfq_enqueue(&relay_cmd_queue.queue, &relay_cmd->node); | |
663 | ||
664 | /* | |
665 | * Wake the dispatch queue futex. Implicit memory | |
666 | * barrier with the exchange in cds_wfq_enqueue. | |
667 | */ | |
668 | futex_nto1_wake(&relay_cmd_queue.futex); | |
669 | } | |
670 | } | |
671 | } | |
672 | ||
095a4ae5 | 673 | exit: |
b8aa1682 JD |
674 | error: |
675 | error_poll_add: | |
676 | lttng_poll_clean(&events); | |
677 | error_create_poll: | |
095a4ae5 MD |
678 | if (data_sock->fd >= 0) { |
679 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
680 | if (ret) { |
681 | PERROR("close"); | |
682 | } | |
b8aa1682 | 683 | } |
095a4ae5 MD |
684 | lttcomm_destroy_sock(data_sock); |
685 | error_sock_relay: | |
686 | if (control_sock->fd >= 0) { | |
687 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
688 | if (ret) { |
689 | PERROR("close"); | |
690 | } | |
b8aa1682 | 691 | } |
095a4ae5 MD |
692 | lttcomm_destroy_sock(control_sock); |
693 | error_sock_control: | |
694 | if (err) { | |
f385ae0a MD |
695 | health_error(); |
696 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 697 | } |
55706a7d | 698 | health_unregister(health_relayd); |
b8aa1682 JD |
699 | DBG("Relay listener thread cleanup complete"); |
700 | stop_threads(); | |
b8aa1682 JD |
701 | return NULL; |
702 | } | |
703 | ||
704 | /* | |
705 | * This thread manages the dispatching of the requests to worker threads | |
706 | */ | |
707 | static | |
708 | void *relay_thread_dispatcher(void *data) | |
709 | { | |
f385ae0a | 710 | int ret, err = -1; |
b8aa1682 JD |
711 | struct cds_wfq_node *node; |
712 | struct relay_command *relay_cmd = NULL; | |
713 | ||
714 | DBG("[thread] Relay dispatcher started"); | |
715 | ||
55706a7d MD |
716 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
717 | ||
f385ae0a MD |
718 | health_code_update(); |
719 | ||
26c9d55e | 720 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
f385ae0a MD |
721 | health_code_update(); |
722 | ||
b8aa1682 JD |
723 | /* Atomically prepare the queue futex */ |
724 | futex_nto1_prepare(&relay_cmd_queue.futex); | |
725 | ||
726 | do { | |
f385ae0a MD |
727 | health_code_update(); |
728 | ||
b8aa1682 JD |
729 | /* Dequeue commands */ |
730 | node = cds_wfq_dequeue_blocking(&relay_cmd_queue.queue); | |
731 | if (node == NULL) { | |
732 | DBG("Woken up but nothing in the relay command queue"); | |
733 | /* Continue thread execution */ | |
734 | break; | |
735 | } | |
736 | ||
737 | relay_cmd = caa_container_of(node, struct relay_command, node); | |
738 | DBG("Dispatching request waiting on sock %d", relay_cmd->sock->fd); | |
739 | ||
740 | /* | |
741 | * Inform worker thread of the new request. This | |
742 | * call is blocking so we can be assured that the data will be read | |
743 | * at some point in time or wait to the end of the world :) | |
744 | */ | |
6f94560a MD |
745 | do { |
746 | ret = write(relay_cmd_pipe[1], relay_cmd, | |
747 | sizeof(struct relay_command)); | |
748 | } while (ret < 0 && errno == EINTR); | |
b8aa1682 | 749 | free(relay_cmd); |
4cec016f | 750 | if (ret < 0 || ret != sizeof(struct relay_command)) { |
b8aa1682 JD |
751 | PERROR("write cmd pipe"); |
752 | goto error; | |
753 | } | |
754 | } while (node != NULL); | |
755 | ||
756 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 757 | health_poll_entry(); |
b8aa1682 | 758 | futex_nto1_wait(&relay_cmd_queue.futex); |
f385ae0a | 759 | health_poll_exit(); |
b8aa1682 JD |
760 | } |
761 | ||
f385ae0a MD |
762 | /* Normal exit, no error */ |
763 | err = 0; | |
764 | ||
b8aa1682 | 765 | error: |
f385ae0a MD |
766 | if (err) { |
767 | health_error(); | |
768 | ERR("Health error occurred in %s", __func__); | |
769 | } | |
55706a7d | 770 | health_unregister(health_relayd); |
b8aa1682 JD |
771 | DBG("Dispatch thread dying"); |
772 | stop_threads(); | |
773 | return NULL; | |
774 | } | |
775 | ||
de91f48a DG |
776 | /* |
777 | * Get stream from stream id. | |
778 | * Need to be called with RCU read-side lock held. | |
779 | */ | |
d3e2ba59 | 780 | struct relay_stream *relay_stream_find_by_id(uint64_t stream_id) |
de91f48a DG |
781 | { |
782 | struct lttng_ht_node_ulong *node; | |
783 | struct lttng_ht_iter iter; | |
784 | struct relay_stream *ret; | |
785 | ||
d3e2ba59 | 786 | lttng_ht_lookup(relay_streams_ht, |
de91f48a DG |
787 | (void *)((unsigned long) stream_id), |
788 | &iter); | |
789 | node = lttng_ht_iter_get_node_ulong(&iter); | |
790 | if (node == NULL) { | |
791 | DBG("Relay stream %" PRIu64 " not found", stream_id); | |
792 | ret = NULL; | |
793 | goto end; | |
794 | } | |
795 | ||
796 | ret = caa_container_of(node, struct relay_stream, stream_n); | |
797 | ||
798 | end: | |
799 | return ret; | |
800 | } | |
801 | ||
9d1bbf21 MD |
802 | static |
803 | void deferred_free_stream(struct rcu_head *head) | |
804 | { | |
805 | struct relay_stream *stream = | |
806 | caa_container_of(head, struct relay_stream, rcu_node); | |
d3e2ba59 JD |
807 | |
808 | ctf_trace_try_destroy(stream->ctf_trace); | |
809 | ||
0f907de1 JD |
810 | free(stream->path_name); |
811 | free(stream->channel_name); | |
9d1bbf21 MD |
812 | free(stream); |
813 | } | |
814 | ||
d3e2ba59 JD |
815 | static |
816 | void deferred_free_session(struct rcu_head *head) | |
817 | { | |
818 | struct relay_session *session = | |
819 | caa_container_of(head, struct relay_session, rcu_node); | |
820 | free(session); | |
821 | } | |
822 | ||
4c80d9a2 DG |
823 | /* |
824 | * Close a given stream. The stream is freed using a call RCU. | |
825 | * | |
826 | * RCU read side lock MUST be acquired. If NO close_stream_check() was called | |
827 | * BEFORE the stream lock MUST be acquired. | |
828 | */ | |
c07d8a78 | 829 | static void destroy_stream(struct relay_stream *stream) |
94d49140 JD |
830 | { |
831 | int delret; | |
832 | struct relay_viewer_stream *vstream; | |
833 | struct lttng_ht_iter iter; | |
834 | ||
835 | assert(stream); | |
94d49140 JD |
836 | |
837 | delret = close(stream->fd); | |
838 | if (delret < 0) { | |
839 | PERROR("close stream"); | |
840 | } | |
841 | ||
842 | if (stream->index_fd >= 0) { | |
843 | delret = close(stream->index_fd); | |
844 | if (delret < 0) { | |
845 | PERROR("close stream index_fd"); | |
846 | } | |
847 | } | |
848 | ||
92c6ca54 | 849 | vstream = live_find_viewer_stream_by_id(stream->stream_handle); |
94d49140 JD |
850 | if (vstream) { |
851 | /* | |
852 | * Set the last good value into the viewer stream. This is done | |
853 | * right before the stream gets deleted from the hash table. The | |
854 | * lookup failure on the live thread side of a stream indicates | |
855 | * that the viewer stream index received value should be used. | |
856 | */ | |
857 | vstream->total_index_received = stream->total_index_received; | |
858 | } | |
859 | ||
efc8a87f DG |
860 | /* Cleanup index of that stream. */ |
861 | relay_index_destroy_by_stream_id(stream->stream_handle); | |
862 | ||
94d49140 JD |
863 | iter.iter.node = &stream->stream_n.node; |
864 | delret = lttng_ht_del(relay_streams_ht, &iter); | |
865 | assert(!delret); | |
866 | iter.iter.node = &stream->ctf_trace_node.node; | |
c07d8a78 | 867 | delret = lttng_ht_del(stream->ctf_traces_ht, &iter); |
94d49140 JD |
868 | assert(!delret); |
869 | call_rcu(&stream->rcu_node, deferred_free_stream); | |
870 | DBG("Closed tracefile %d from close stream", stream->fd); | |
871 | } | |
872 | ||
b8aa1682 JD |
873 | /* |
874 | * relay_delete_session: Free all memory associated with a session and | |
875 | * close all the FDs | |
876 | */ | |
877 | static | |
d3e2ba59 JD |
878 | void relay_delete_session(struct relay_command *cmd, |
879 | struct lttng_ht *sessions_ht) | |
b8aa1682 JD |
880 | { |
881 | struct lttng_ht_iter iter; | |
882 | struct lttng_ht_node_ulong *node; | |
883 | struct relay_stream *stream; | |
884 | int ret; | |
885 | ||
095a4ae5 | 886 | if (!cmd->session) { |
b8aa1682 | 887 | return; |
095a4ae5 | 888 | } |
b8aa1682 | 889 | |
77c7c900 | 890 | DBG("Relay deleting session %" PRIu64, cmd->session->id); |
5b6d8097 | 891 | |
9d1bbf21 | 892 | rcu_read_lock(); |
d3e2ba59 | 893 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, node, node) { |
b8aa1682 | 894 | node = lttng_ht_iter_get_node_ulong(&iter); |
4c80d9a2 DG |
895 | if (!node) { |
896 | continue; | |
b8aa1682 | 897 | } |
4c80d9a2 DG |
898 | stream = caa_container_of(node, struct relay_stream, stream_n); |
899 | if (stream->session == cmd->session) { | |
c07d8a78 | 900 | destroy_stream(stream); |
87b576ec JD |
901 | cmd->session->stream_count--; |
902 | assert(cmd->session->stream_count >= 0); | |
4c80d9a2 | 903 | } |
b8aa1682 | 904 | } |
4c80d9a2 DG |
905 | |
906 | /* Make this session not visible anymore. */ | |
d3e2ba59 JD |
907 | iter.iter.node = &cmd->session->session_n.node; |
908 | ret = lttng_ht_del(sessions_ht, &iter); | |
909 | assert(!ret); | |
4c80d9a2 | 910 | call_rcu(&cmd->session->rcu_node, deferred_free_session); |
9d1bbf21 | 911 | rcu_read_unlock(); |
b8aa1682 JD |
912 | } |
913 | ||
1c20f0e2 JD |
914 | /* |
915 | * Copy index data from the control port to a given index object. | |
916 | */ | |
917 | static void copy_index_control_data(struct relay_index *index, | |
918 | struct lttcomm_relayd_index *data) | |
919 | { | |
920 | assert(index); | |
921 | assert(data); | |
922 | ||
923 | /* | |
924 | * The index on disk is encoded in big endian, so we don't need to convert | |
925 | * the data received on the network. The data_offset value is NEVER | |
926 | * modified here and is updated by the data thread. | |
927 | */ | |
928 | index->index_data.packet_size = data->packet_size; | |
929 | index->index_data.content_size = data->content_size; | |
930 | index->index_data.timestamp_begin = data->timestamp_begin; | |
931 | index->index_data.timestamp_end = data->timestamp_end; | |
932 | index->index_data.events_discarded = data->events_discarded; | |
933 | index->index_data.stream_id = data->stream_id; | |
934 | } | |
935 | ||
c5b6f4f0 DG |
936 | /* |
937 | * Handle the RELAYD_CREATE_SESSION command. | |
938 | * | |
939 | * On success, send back the session id or else return a negative value. | |
940 | */ | |
941 | static | |
942 | int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 JD |
943 | struct relay_command *cmd, |
944 | struct lttng_ht *sessions_ht) | |
c5b6f4f0 DG |
945 | { |
946 | int ret = 0, send_ret; | |
947 | struct relay_session *session; | |
948 | struct lttcomm_relayd_status_session reply; | |
949 | ||
950 | assert(recv_hdr); | |
951 | assert(cmd); | |
952 | ||
953 | memset(&reply, 0, sizeof(reply)); | |
954 | ||
955 | session = zmalloc(sizeof(struct relay_session)); | |
956 | if (session == NULL) { | |
957 | PERROR("relay session zmalloc"); | |
958 | ret = -1; | |
959 | goto error; | |
960 | } | |
961 | ||
962 | session->id = ++last_relay_session_id; | |
963 | session->sock = cmd->sock; | |
7d2f7452 DG |
964 | session->minor = cmd->minor; |
965 | session->major = cmd->major; | |
c5b6f4f0 DG |
966 | cmd->session = session; |
967 | ||
968 | reply.session_id = htobe64(session->id); | |
969 | ||
d3e2ba59 JD |
970 | switch (cmd->minor) { |
971 | case 4: /* LTTng sessiond 2.4 */ | |
972 | default: | |
973 | ret = cmd_create_session_2_4(cmd, session); | |
974 | break; | |
975 | } | |
976 | ||
977 | lttng_ht_node_init_ulong(&session->session_n, | |
978 | (unsigned long) session->id); | |
979 | lttng_ht_add_unique_ulong(sessions_ht, | |
980 | &session->session_n); | |
981 | ||
c5b6f4f0 DG |
982 | DBG("Created session %" PRIu64, session->id); |
983 | ||
984 | error: | |
985 | if (ret < 0) { | |
986 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
987 | } else { | |
988 | reply.ret_code = htobe32(LTTNG_OK); | |
989 | } | |
990 | ||
991 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
992 | if (send_ret < 0) { | |
993 | ERR("Relayd sending session id"); | |
4169f5ad | 994 | ret = send_ret; |
c5b6f4f0 DG |
995 | } |
996 | ||
997 | return ret; | |
998 | } | |
999 | ||
b8aa1682 JD |
1000 | /* |
1001 | * relay_add_stream: allocate a new stream for a session | |
1002 | */ | |
1003 | static | |
1004 | int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1005 | struct relay_command *cmd, struct lttng_ht *sessions_ht) |
b8aa1682 JD |
1006 | { |
1007 | struct relay_session *session = cmd->session; | |
b8aa1682 JD |
1008 | struct relay_stream *stream = NULL; |
1009 | struct lttcomm_relayd_status_stream reply; | |
b8aa1682 JD |
1010 | int ret, send_ret; |
1011 | ||
c5b6f4f0 | 1012 | if (!session || cmd->version_check_done == 0) { |
b8aa1682 JD |
1013 | ERR("Trying to add a stream before version check"); |
1014 | ret = -1; | |
1015 | goto end_no_session; | |
1016 | } | |
1017 | ||
b8aa1682 JD |
1018 | stream = zmalloc(sizeof(struct relay_stream)); |
1019 | if (stream == NULL) { | |
1020 | PERROR("relay stream zmalloc"); | |
1021 | ret = -1; | |
1022 | goto end_no_session; | |
1023 | } | |
1024 | ||
0f907de1 JD |
1025 | switch (cmd->minor) { |
1026 | case 1: /* LTTng sessiond 2.1 */ | |
1027 | ret = cmd_recv_stream_2_1(cmd, stream); | |
1028 | break; | |
1029 | case 2: /* LTTng sessiond 2.2 */ | |
1030 | default: | |
1031 | ret = cmd_recv_stream_2_2(cmd, stream); | |
1032 | break; | |
1033 | } | |
1034 | if (ret < 0) { | |
1035 | goto err_free_stream; | |
1036 | } | |
1037 | ||
9d1bbf21 | 1038 | rcu_read_lock(); |
b8aa1682 | 1039 | stream->stream_handle = ++last_relay_stream_id; |
173af62f | 1040 | stream->prev_seq = -1ULL; |
b8aa1682 | 1041 | stream->session = session; |
1c20f0e2 | 1042 | stream->index_fd = -1; |
d3e2ba59 JD |
1043 | stream->read_index_fd = -1; |
1044 | stream->ctf_trace = NULL; | |
1045 | pthread_mutex_init(&stream->lock, NULL); | |
b8aa1682 | 1046 | |
0f907de1 | 1047 | ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG); |
b8aa1682 | 1048 | if (ret < 0) { |
b8aa1682 JD |
1049 | ERR("relay creating output directory"); |
1050 | goto end; | |
1051 | } | |
1052 | ||
be96a7d1 DG |
1053 | /* |
1054 | * No need to use run_as API here because whatever we receives, the relayd | |
1055 | * uses its own credentials for the stream files. | |
1056 | */ | |
0f907de1 | 1057 | ret = utils_create_stream_file(stream->path_name, stream->channel_name, |
1c20f0e2 | 1058 | stream->tracefile_size, 0, relayd_uid, relayd_gid, NULL); |
b8aa1682 | 1059 | if (ret < 0) { |
0f907de1 | 1060 | ERR("Create output file"); |
b8aa1682 JD |
1061 | goto end; |
1062 | } | |
b8aa1682 | 1063 | stream->fd = ret; |
0f907de1 JD |
1064 | if (stream->tracefile_size) { |
1065 | DBG("Tracefile %s/%s_0 created", stream->path_name, stream->channel_name); | |
1066 | } else { | |
1067 | DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name); | |
1068 | } | |
b8aa1682 | 1069 | |
d3e2ba59 JD |
1070 | if (!strncmp(stream->channel_name, DEFAULT_METADATA_NAME, NAME_MAX)) { |
1071 | stream->metadata_flag = 1; | |
1072 | /* | |
1073 | * When we receive a new metadata stream, we create a new | |
1074 | * ctf_trace and we assign this ctf_trace to all streams with | |
1075 | * the same path. | |
1076 | * | |
1077 | * If later on we receive a new stream for the same ctf_trace, | |
1078 | * we copy the information from the first hit in the HT to the | |
1079 | * new stream. | |
1080 | */ | |
1081 | stream->ctf_trace = ctf_trace_create(); | |
1082 | if (!stream->ctf_trace) { | |
1083 | ret = -1; | |
1084 | goto end; | |
1085 | } | |
1086 | stream->ctf_trace->refcount++; | |
1087 | stream->ctf_trace->metadata_stream = stream; | |
1088 | } | |
1089 | ctf_trace_assign(cmd->ctf_traces_ht, stream); | |
c07d8a78 | 1090 | stream->ctf_traces_ht = cmd->ctf_traces_ht; |
d3e2ba59 | 1091 | |
b8aa1682 JD |
1092 | lttng_ht_node_init_ulong(&stream->stream_n, |
1093 | (unsigned long) stream->stream_handle); | |
d3e2ba59 | 1094 | lttng_ht_add_unique_ulong(relay_streams_ht, |
b8aa1682 JD |
1095 | &stream->stream_n); |
1096 | ||
d3e2ba59 JD |
1097 | lttng_ht_node_init_str(&stream->ctf_trace_node, stream->path_name); |
1098 | lttng_ht_add_str(cmd->ctf_traces_ht, &stream->ctf_trace_node); | |
87b576ec | 1099 | session->stream_count++; |
d3e2ba59 | 1100 | |
1c20f0e2 JD |
1101 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
1102 | stream->stream_handle); | |
b8aa1682 JD |
1103 | |
1104 | end: | |
5af40280 | 1105 | reply.handle = htobe64(stream->stream_handle); |
b8aa1682 JD |
1106 | /* send the session id to the client or a negative return code on error */ |
1107 | if (ret < 0) { | |
f73fabfd | 1108 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5af40280 CB |
1109 | /* stream was not properly added to the ht, so free it */ |
1110 | free(stream); | |
b8aa1682 | 1111 | } else { |
f73fabfd | 1112 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1113 | } |
5af40280 | 1114 | |
b8aa1682 JD |
1115 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, |
1116 | sizeof(struct lttcomm_relayd_status_stream), 0); | |
1117 | if (send_ret < 0) { | |
1118 | ERR("Relay sending stream id"); | |
4169f5ad | 1119 | ret = send_ret; |
b8aa1682 | 1120 | } |
9d1bbf21 | 1121 | rcu_read_unlock(); |
b8aa1682 JD |
1122 | |
1123 | end_no_session: | |
1124 | return ret; | |
0f907de1 JD |
1125 | |
1126 | err_free_stream: | |
1127 | free(stream->path_name); | |
1128 | free(stream->channel_name); | |
1129 | free(stream); | |
1130 | return ret; | |
b8aa1682 JD |
1131 | } |
1132 | ||
173af62f DG |
1133 | /* |
1134 | * relay_close_stream: close a specific stream | |
1135 | */ | |
1136 | static | |
1137 | int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
92c6ca54 | 1138 | struct relay_command *cmd) |
173af62f | 1139 | { |
94d49140 | 1140 | int ret, send_ret; |
173af62f DG |
1141 | struct relay_session *session = cmd->session; |
1142 | struct lttcomm_relayd_close_stream stream_info; | |
1143 | struct lttcomm_relayd_generic_reply reply; | |
1144 | struct relay_stream *stream; | |
173af62f DG |
1145 | |
1146 | DBG("Close stream received"); | |
1147 | ||
c5b6f4f0 | 1148 | if (!session || cmd->version_check_done == 0) { |
173af62f DG |
1149 | ERR("Trying to close a stream before version check"); |
1150 | ret = -1; | |
1151 | goto end_no_session; | |
1152 | } | |
1153 | ||
1154 | ret = cmd->sock->ops->recvmsg(cmd->sock, &stream_info, | |
7c5aef62 | 1155 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f | 1156 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
a6cd2b97 DG |
1157 | if (ret == 0) { |
1158 | /* Orderly shutdown. Not necessary to print an error. */ | |
1159 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1160 | } else { | |
1161 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
1162 | } | |
173af62f DG |
1163 | ret = -1; |
1164 | goto end_no_session; | |
1165 | } | |
1166 | ||
1167 | rcu_read_lock(); | |
d3e2ba59 | 1168 | stream = relay_stream_find_by_id(be64toh(stream_info.stream_id)); |
173af62f DG |
1169 | if (!stream) { |
1170 | ret = -1; | |
1171 | goto end_unlock; | |
1172 | } | |
1173 | ||
8e2583a4 | 1174 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
173af62f | 1175 | stream->close_flag = 1; |
87b576ec JD |
1176 | session->stream_count--; |
1177 | assert(session->stream_count >= 0); | |
173af62f DG |
1178 | |
1179 | if (close_stream_check(stream)) { | |
c07d8a78 | 1180 | destroy_stream(stream); |
173af62f DG |
1181 | } |
1182 | ||
1183 | end_unlock: | |
1184 | rcu_read_unlock(); | |
1185 | ||
1186 | if (ret < 0) { | |
f73fabfd | 1187 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1188 | } else { |
f73fabfd | 1189 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f DG |
1190 | } |
1191 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1192 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1193 | if (send_ret < 0) { | |
1194 | ERR("Relay sending stream id"); | |
4169f5ad | 1195 | ret = send_ret; |
173af62f DG |
1196 | } |
1197 | ||
1198 | end_no_session: | |
1199 | return ret; | |
1200 | } | |
1201 | ||
b8aa1682 JD |
1202 | /* |
1203 | * relay_unknown_command: send -1 if received unknown command | |
1204 | */ | |
1205 | static | |
1206 | void relay_unknown_command(struct relay_command *cmd) | |
1207 | { | |
1208 | struct lttcomm_relayd_generic_reply reply; | |
1209 | int ret; | |
1210 | ||
f73fabfd | 1211 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1212 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, |
1213 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1214 | if (ret < 0) { | |
1215 | ERR("Relay sending unknown command"); | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | /* | |
1220 | * relay_start: send an acknowledgment to the client to tell if we are | |
1221 | * ready to receive data. We are ready if a session is established. | |
1222 | */ | |
1223 | static | |
1224 | int relay_start(struct lttcomm_relayd_hdr *recv_hdr, | |
1225 | struct relay_command *cmd) | |
1226 | { | |
f73fabfd | 1227 | int ret = htobe32(LTTNG_OK); |
b8aa1682 JD |
1228 | struct lttcomm_relayd_generic_reply reply; |
1229 | struct relay_session *session = cmd->session; | |
1230 | ||
1231 | if (!session) { | |
1232 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1233 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1234 | } |
1235 | ||
1236 | reply.ret_code = ret; | |
1237 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1238 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1239 | if (ret < 0) { | |
1240 | ERR("Relay sending start ack"); | |
1241 | } | |
1242 | ||
1243 | return ret; | |
1244 | } | |
1245 | ||
1d4dfdef DG |
1246 | /* |
1247 | * Append padding to the file pointed by the file descriptor fd. | |
1248 | */ | |
1249 | static int write_padding_to_file(int fd, uint32_t size) | |
1250 | { | |
1251 | int ret = 0; | |
1252 | char *zeros; | |
1253 | ||
1254 | if (size == 0) { | |
1255 | goto end; | |
1256 | } | |
1257 | ||
1258 | zeros = zmalloc(size); | |
1259 | if (zeros == NULL) { | |
1260 | PERROR("zmalloc zeros for padding"); | |
1261 | ret = -1; | |
1262 | goto end; | |
1263 | } | |
1264 | ||
1265 | do { | |
1266 | ret = write(fd, zeros, size); | |
1267 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 1268 | if (ret < 0 || ret != size) { |
1d4dfdef DG |
1269 | PERROR("write padding to file"); |
1270 | } | |
1271 | ||
e986c7a1 DG |
1272 | free(zeros); |
1273 | ||
1d4dfdef DG |
1274 | end: |
1275 | return ret; | |
1276 | } | |
1277 | ||
b8aa1682 JD |
1278 | /* |
1279 | * relay_recv_metadata: receive the metada for the session. | |
1280 | */ | |
1281 | static | |
1282 | int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1283 | struct relay_command *cmd) |
b8aa1682 | 1284 | { |
f73fabfd | 1285 | int ret = htobe32(LTTNG_OK); |
b8aa1682 JD |
1286 | struct relay_session *session = cmd->session; |
1287 | struct lttcomm_relayd_metadata_payload *metadata_struct; | |
1288 | struct relay_stream *metadata_stream; | |
1289 | uint64_t data_size, payload_size; | |
1290 | ||
1291 | if (!session) { | |
1292 | ERR("Metadata sent before version check"); | |
1293 | ret = -1; | |
1294 | goto end; | |
1295 | } | |
1296 | ||
f6416125 MD |
1297 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1298 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1299 | ERR("Incorrect data size"); | |
1300 | ret = -1; | |
1301 | goto end; | |
1302 | } | |
1303 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1304 | ||
b8aa1682 | 1305 | if (data_buffer_size < data_size) { |
d7b3776f | 1306 | /* In case the realloc fails, we can free the memory */ |
c617c0c6 MD |
1307 | char *tmp_data_ptr; |
1308 | ||
1309 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1310 | if (!tmp_data_ptr) { | |
b8aa1682 | 1311 | ERR("Allocating data buffer"); |
c617c0c6 | 1312 | free(data_buffer); |
b8aa1682 JD |
1313 | ret = -1; |
1314 | goto end; | |
1315 | } | |
c617c0c6 | 1316 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1317 | data_buffer_size = data_size; |
1318 | } | |
1319 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1320 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
7c5aef62 | 1321 | ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0); |
b8aa1682 | 1322 | if (ret < 0 || ret != data_size) { |
a6cd2b97 DG |
1323 | if (ret == 0) { |
1324 | /* Orderly shutdown. Not necessary to print an error. */ | |
1325 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1326 | } else { | |
1327 | ERR("Relay didn't receive the whole metadata"); | |
1328 | } | |
b8aa1682 | 1329 | ret = -1; |
b8aa1682 JD |
1330 | goto end; |
1331 | } | |
1332 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 MD |
1333 | |
1334 | rcu_read_lock(); | |
d3e2ba59 JD |
1335 | metadata_stream = relay_stream_find_by_id( |
1336 | be64toh(metadata_struct->stream_id)); | |
b8aa1682 JD |
1337 | if (!metadata_stream) { |
1338 | ret = -1; | |
9d1bbf21 | 1339 | goto end_unlock; |
b8aa1682 JD |
1340 | } |
1341 | ||
6f94560a MD |
1342 | do { |
1343 | ret = write(metadata_stream->fd, metadata_struct->payload, | |
1344 | payload_size); | |
1345 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 1346 | if (ret < 0 || ret != payload_size) { |
b8aa1682 JD |
1347 | ERR("Relay error writing metadata on file"); |
1348 | ret = -1; | |
9d1bbf21 | 1349 | goto end_unlock; |
b8aa1682 | 1350 | } |
1d4dfdef DG |
1351 | |
1352 | ret = write_padding_to_file(metadata_stream->fd, | |
1353 | be32toh(metadata_struct->padding_size)); | |
1354 | if (ret < 0) { | |
1355 | goto end_unlock; | |
1356 | } | |
d3e2ba59 JD |
1357 | metadata_stream->ctf_trace->metadata_received += |
1358 | payload_size + be32toh(metadata_struct->padding_size); | |
1d4dfdef | 1359 | |
b8aa1682 JD |
1360 | DBG2("Relay metadata written"); |
1361 | ||
9d1bbf21 | 1362 | end_unlock: |
6e3c5836 | 1363 | rcu_read_unlock(); |
b8aa1682 JD |
1364 | end: |
1365 | return ret; | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * relay_send_version: send relayd version number | |
1370 | */ | |
1371 | static | |
1372 | int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1373 | struct relay_command *cmd, struct lttng_ht *sessions_ht) |
b8aa1682 | 1374 | { |
7f51dcba | 1375 | int ret; |
092b6259 | 1376 | struct lttcomm_relayd_version reply, msg; |
b8aa1682 | 1377 | |
c5b6f4f0 DG |
1378 | assert(cmd); |
1379 | ||
1380 | cmd->version_check_done = 1; | |
b8aa1682 | 1381 | |
092b6259 | 1382 | /* Get version from the other side. */ |
7c5aef62 | 1383 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); |
092b6259 | 1384 | if (ret < 0 || ret != sizeof(msg)) { |
a6cd2b97 DG |
1385 | if (ret == 0) { |
1386 | /* Orderly shutdown. Not necessary to print an error. */ | |
1387 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1388 | } else { | |
1389 | ERR("Relay failed to receive the version values."); | |
1390 | } | |
092b6259 | 1391 | ret = -1; |
092b6259 DG |
1392 | goto end; |
1393 | } | |
1394 | ||
d83a952c MD |
1395 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1396 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1397 | |
1398 | /* Major versions must be the same */ | |
1399 | if (reply.major != be32toh(msg.major)) { | |
6151a90f JD |
1400 | DBG("Incompatible major versions (%u vs %u), deleting session", |
1401 | reply.major, be32toh(msg.major)); | |
d3e2ba59 | 1402 | relay_delete_session(cmd, sessions_ht); |
d4519fa3 JD |
1403 | ret = 0; |
1404 | goto end; | |
1405 | } | |
1406 | ||
0f907de1 JD |
1407 | cmd->major = reply.major; |
1408 | /* We adapt to the lowest compatible version */ | |
1409 | if (reply.minor <= be32toh(msg.minor)) { | |
1410 | cmd->minor = reply.minor; | |
1411 | } else { | |
1412 | cmd->minor = be32toh(msg.minor); | |
1413 | } | |
1414 | ||
6151a90f JD |
1415 | reply.major = htobe32(reply.major); |
1416 | reply.minor = htobe32(reply.minor); | |
1417 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1418 | sizeof(struct lttcomm_relayd_version), 0); | |
1419 | if (ret < 0) { | |
1420 | ERR("Relay sending version"); | |
1421 | } | |
1422 | ||
0f907de1 JD |
1423 | DBG("Version check done using protocol %u.%u", cmd->major, |
1424 | cmd->minor); | |
b8aa1682 JD |
1425 | |
1426 | end: | |
1427 | return ret; | |
1428 | } | |
1429 | ||
c8f59ee5 | 1430 | /* |
6d805429 | 1431 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 DG |
1432 | */ |
1433 | static | |
6d805429 | 1434 | int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
d3e2ba59 | 1435 | struct relay_command *cmd) |
c8f59ee5 DG |
1436 | { |
1437 | struct relay_session *session = cmd->session; | |
6d805429 | 1438 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1439 | struct lttcomm_relayd_generic_reply reply; |
1440 | struct relay_stream *stream; | |
1441 | int ret; | |
c8f59ee5 DG |
1442 | uint64_t last_net_seq_num, stream_id; |
1443 | ||
6d805429 | 1444 | DBG("Data pending command received"); |
c8f59ee5 | 1445 | |
c5b6f4f0 | 1446 | if (!session || cmd->version_check_done == 0) { |
c8f59ee5 DG |
1447 | ERR("Trying to check for data before version check"); |
1448 | ret = -1; | |
1449 | goto end_no_session; | |
1450 | } | |
1451 | ||
7c5aef62 | 1452 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1453 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1454 | if (ret == 0) { |
1455 | /* Orderly shutdown. Not necessary to print an error. */ | |
1456 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1457 | } else { | |
1458 | ERR("Relay didn't receive valid data_pending struct size : %d", | |
1459 | ret); | |
1460 | } | |
c8f59ee5 DG |
1461 | ret = -1; |
1462 | goto end_no_session; | |
1463 | } | |
1464 | ||
1465 | stream_id = be64toh(msg.stream_id); | |
1466 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1467 | ||
1468 | rcu_read_lock(); | |
d3e2ba59 | 1469 | stream = relay_stream_find_by_id(stream_id); |
de91f48a | 1470 | if (stream == NULL) { |
c8f59ee5 DG |
1471 | ret = -1; |
1472 | goto end_unlock; | |
1473 | } | |
1474 | ||
6d805429 | 1475 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1476 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1477 | last_net_seq_num); | |
1478 | ||
33832e64 | 1479 | /* Avoid wrapping issue */ |
39df6d9f | 1480 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) >= 0) { |
6d805429 | 1481 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1482 | ret = 0; |
6d805429 DG |
1483 | } else { |
1484 | /* Data still being streamed thus pending */ | |
1485 | ret = 1; | |
c8f59ee5 DG |
1486 | } |
1487 | ||
f7079f67 DG |
1488 | /* Pending check is now done. */ |
1489 | stream->data_pending_check_done = 1; | |
1490 | ||
c8f59ee5 DG |
1491 | end_unlock: |
1492 | rcu_read_unlock(); | |
1493 | ||
1494 | reply.ret_code = htobe32(ret); | |
1495 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1496 | if (ret < 0) { | |
6d805429 | 1497 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1498 | } |
1499 | ||
1500 | end_no_session: | |
1501 | return ret; | |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | * Wait for the control socket to reach a quiescent state. | |
1506 | * | |
1507 | * Note that for now, when receiving this command from the session daemon, this | |
1508 | * means that every subsequent commands or data received on the control socket | |
1509 | * has been handled. So, this is why we simply return OK here. | |
1510 | */ | |
1511 | static | |
1512 | int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1513 | struct relay_command *cmd) |
c8f59ee5 DG |
1514 | { |
1515 | int ret; | |
ad7051c0 DG |
1516 | uint64_t stream_id; |
1517 | struct relay_stream *stream; | |
1518 | struct lttng_ht_iter iter; | |
1519 | struct lttcomm_relayd_quiescent_control msg; | |
c8f59ee5 DG |
1520 | struct lttcomm_relayd_generic_reply reply; |
1521 | ||
1522 | DBG("Checking quiescent state on control socket"); | |
1523 | ||
ad7051c0 DG |
1524 | if (!cmd->session || cmd->version_check_done == 0) { |
1525 | ERR("Trying to check for data before version check"); | |
1526 | ret = -1; | |
1527 | goto end_no_session; | |
1528 | } | |
1529 | ||
1530 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1531 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1532 | if (ret == 0) { |
1533 | /* Orderly shutdown. Not necessary to print an error. */ | |
1534 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1535 | } else { | |
1536 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1537 | ret); | |
1538 | } | |
ad7051c0 DG |
1539 | ret = -1; |
1540 | goto end_no_session; | |
1541 | } | |
1542 | ||
1543 | stream_id = be64toh(msg.stream_id); | |
1544 | ||
1545 | rcu_read_lock(); | |
d3e2ba59 JD |
1546 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
1547 | stream_n.node) { | |
ad7051c0 DG |
1548 | if (stream->stream_handle == stream_id) { |
1549 | stream->data_pending_check_done = 1; | |
1550 | DBG("Relay quiescent control pending flag set to %" PRIu64, | |
1551 | stream_id); | |
1552 | break; | |
1553 | } | |
1554 | } | |
1555 | rcu_read_unlock(); | |
1556 | ||
c8f59ee5 DG |
1557 | reply.ret_code = htobe32(LTTNG_OK); |
1558 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1559 | if (ret < 0) { | |
6d805429 | 1560 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1561 | } |
1562 | ||
ad7051c0 | 1563 | end_no_session: |
c8f59ee5 DG |
1564 | return ret; |
1565 | } | |
1566 | ||
f7079f67 DG |
1567 | /* |
1568 | * Initialize a data pending command. This means that a client is about to ask | |
1569 | * for data pending for each stream he/she holds. Simply iterate over all | |
1570 | * streams of a session and set the data_pending_check_done flag. | |
1571 | * | |
1572 | * This command returns to the client a LTTNG_OK code. | |
1573 | */ | |
1574 | static | |
1575 | int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1576 | struct relay_command *cmd) |
f7079f67 DG |
1577 | { |
1578 | int ret; | |
1579 | struct lttng_ht_iter iter; | |
1580 | struct lttcomm_relayd_begin_data_pending msg; | |
1581 | struct lttcomm_relayd_generic_reply reply; | |
1582 | struct relay_stream *stream; | |
1583 | uint64_t session_id; | |
1584 | ||
1585 | assert(recv_hdr); | |
1586 | assert(cmd); | |
f7079f67 DG |
1587 | |
1588 | DBG("Init streams for data pending"); | |
1589 | ||
1590 | if (!cmd->session || cmd->version_check_done == 0) { | |
1591 | ERR("Trying to check for data before version check"); | |
1592 | ret = -1; | |
1593 | goto end_no_session; | |
1594 | } | |
1595 | ||
1596 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1597 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1598 | if (ret == 0) { |
1599 | /* Orderly shutdown. Not necessary to print an error. */ | |
1600 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1601 | } else { | |
1602 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1603 | ret); | |
1604 | } | |
f7079f67 DG |
1605 | ret = -1; |
1606 | goto end_no_session; | |
1607 | } | |
1608 | ||
1609 | session_id = be64toh(msg.session_id); | |
1610 | ||
1611 | /* | |
1612 | * Iterate over all streams to set the begin data pending flag. For now, the | |
1613 | * streams are indexed by stream handle so we have to iterate over all | |
1614 | * streams to find the one associated with the right session_id. | |
1615 | */ | |
1616 | rcu_read_lock(); | |
d3e2ba59 JD |
1617 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
1618 | stream_n.node) { | |
f7079f67 DG |
1619 | if (stream->session->id == session_id) { |
1620 | stream->data_pending_check_done = 0; | |
1621 | DBG("Set begin data pending flag to stream %" PRIu64, | |
1622 | stream->stream_handle); | |
1623 | } | |
1624 | } | |
1625 | rcu_read_unlock(); | |
1626 | ||
1627 | /* All good, send back reply. */ | |
1628 | reply.ret_code = htobe32(LTTNG_OK); | |
1629 | ||
1630 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1631 | if (ret < 0) { | |
1632 | ERR("Relay begin data pending send reply failed"); | |
1633 | } | |
1634 | ||
1635 | end_no_session: | |
1636 | return ret; | |
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * End data pending command. This will check, for a given session id, if each | |
1641 | * stream associated with it has its data_pending_check_done flag set. If not, | |
1642 | * this means that the client lost track of the stream but the data is still | |
1643 | * being streamed on our side. In this case, we inform the client that data is | |
1644 | * inflight. | |
1645 | * | |
1646 | * Return to the client if there is data in flight or not with a ret_code. | |
1647 | */ | |
1648 | static | |
1649 | int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1650 | struct relay_command *cmd) |
f7079f67 DG |
1651 | { |
1652 | int ret; | |
1653 | struct lttng_ht_iter iter; | |
1654 | struct lttcomm_relayd_end_data_pending msg; | |
1655 | struct lttcomm_relayd_generic_reply reply; | |
1656 | struct relay_stream *stream; | |
1657 | uint64_t session_id; | |
1658 | uint32_t is_data_inflight = 0; | |
1659 | ||
1660 | assert(recv_hdr); | |
1661 | assert(cmd); | |
f7079f67 DG |
1662 | |
1663 | DBG("End data pending command"); | |
1664 | ||
1665 | if (!cmd->session || cmd->version_check_done == 0) { | |
1666 | ERR("Trying to check for data before version check"); | |
1667 | ret = -1; | |
1668 | goto end_no_session; | |
1669 | } | |
1670 | ||
1671 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1672 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1673 | if (ret == 0) { |
1674 | /* Orderly shutdown. Not necessary to print an error. */ | |
1675 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1676 | } else { | |
1677 | ERR("Relay didn't receive valid end data_pending struct size: %d", | |
1678 | ret); | |
1679 | } | |
f7079f67 DG |
1680 | ret = -1; |
1681 | goto end_no_session; | |
1682 | } | |
1683 | ||
1684 | session_id = be64toh(msg.session_id); | |
1685 | ||
1686 | /* Iterate over all streams to see if the begin data pending flag is set. */ | |
1687 | rcu_read_lock(); | |
d3e2ba59 JD |
1688 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
1689 | stream_n.node) { | |
f7079f67 DG |
1690 | if (stream->session->id == session_id && |
1691 | !stream->data_pending_check_done) { | |
1692 | is_data_inflight = 1; | |
1693 | DBG("Data is still in flight for stream %" PRIu64, | |
1694 | stream->stream_handle); | |
1695 | break; | |
1696 | } | |
1697 | } | |
1698 | rcu_read_unlock(); | |
1699 | ||
1700 | /* All good, send back reply. */ | |
1701 | reply.ret_code = htobe32(is_data_inflight); | |
1702 | ||
1703 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1704 | if (ret < 0) { | |
1705 | ERR("Relay end data pending send reply failed"); | |
1706 | } | |
1707 | ||
1708 | end_no_session: | |
1709 | return ret; | |
1710 | } | |
1711 | ||
1c20f0e2 JD |
1712 | /* |
1713 | * Receive an index for a specific stream. | |
1714 | * | |
1715 | * Return 0 on success else a negative value. | |
1716 | */ | |
1717 | static | |
1718 | int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, | |
0a6518b0 | 1719 | struct relay_command *cmd) |
1c20f0e2 JD |
1720 | { |
1721 | int ret, send_ret, index_created = 0; | |
1722 | struct relay_session *session = cmd->session; | |
1723 | struct lttcomm_relayd_index index_info; | |
1724 | struct relay_index *index, *wr_index = NULL; | |
1725 | struct lttcomm_relayd_generic_reply reply; | |
1726 | struct relay_stream *stream; | |
1727 | uint64_t net_seq_num; | |
1728 | ||
1729 | assert(cmd); | |
1c20f0e2 JD |
1730 | |
1731 | DBG("Relay receiving index"); | |
1732 | ||
1733 | if (!session || cmd->version_check_done == 0) { | |
1734 | ERR("Trying to close a stream before version check"); | |
1735 | ret = -1; | |
1736 | goto end_no_session; | |
1737 | } | |
1738 | ||
1739 | ret = cmd->sock->ops->recvmsg(cmd->sock, &index_info, | |
1740 | sizeof(index_info), 0); | |
1741 | if (ret < sizeof(index_info)) { | |
1742 | if (ret == 0) { | |
1743 | /* Orderly shutdown. Not necessary to print an error. */ | |
1744 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1745 | } else { | |
1746 | ERR("Relay didn't receive valid index struct size : %d", ret); | |
1747 | } | |
1748 | ret = -1; | |
1749 | goto end_no_session; | |
1750 | } | |
1751 | ||
1752 | net_seq_num = be64toh(index_info.net_seq_num); | |
1753 | ||
1754 | rcu_read_lock(); | |
d3e2ba59 | 1755 | stream = relay_stream_find_by_id(be64toh(index_info.relay_stream_id)); |
1c20f0e2 JD |
1756 | if (!stream) { |
1757 | ret = -1; | |
1758 | goto end_rcu_unlock; | |
1759 | } | |
1760 | ||
d3e2ba59 JD |
1761 | /* Live beacon handling */ |
1762 | if (index_info.packet_size == 0) { | |
1763 | DBG("Received live beacon for stream %" PRIu64, stream->stream_handle); | |
1764 | ||
1765 | /* | |
1766 | * Only flag a stream inactive when it has already received data. | |
1767 | */ | |
1768 | if (stream->total_index_received > 0) { | |
1769 | stream->beacon_ts_end = be64toh(index_info.timestamp_end); | |
1770 | } | |
1771 | ret = 0; | |
1772 | goto end_rcu_unlock; | |
1773 | } else { | |
1774 | stream->beacon_ts_end = -1ULL; | |
1775 | } | |
1776 | ||
0a6518b0 | 1777 | index = relay_index_find(stream->stream_handle, net_seq_num); |
1c20f0e2 JD |
1778 | if (!index) { |
1779 | /* A successful creation will add the object to the HT. */ | |
1780 | index = relay_index_create(stream->stream_handle, net_seq_num); | |
1781 | if (!index) { | |
1782 | goto end_rcu_unlock; | |
1783 | } | |
1784 | index_created = 1; | |
1785 | } | |
1786 | ||
1787 | copy_index_control_data(index, &index_info); | |
1788 | ||
1789 | if (index_created) { | |
1790 | /* | |
1791 | * Try to add the relay index object to the hash table. If an object | |
1792 | * already exist, destroy back the index created, set the data in this | |
1793 | * object and write it on disk. | |
1794 | */ | |
0a6518b0 | 1795 | relay_index_add(index, &wr_index); |
1c20f0e2 JD |
1796 | if (wr_index) { |
1797 | copy_index_control_data(wr_index, &index_info); | |
1798 | free(index); | |
1799 | } | |
1800 | } else { | |
1801 | /* The index already exists so write it on disk. */ | |
1802 | wr_index = index; | |
1803 | } | |
1804 | ||
1805 | /* Do we have a writable ready index to write on disk. */ | |
1806 | if (wr_index) { | |
1807 | /* Starting at 2.4, create the index file if none available. */ | |
1808 | if (cmd->minor >= 4 && stream->index_fd < 0) { | |
1809 | ret = index_create_file(stream->path_name, stream->channel_name, | |
1810 | relayd_uid, relayd_gid, stream->tracefile_size, | |
1811 | stream->tracefile_count_current); | |
1812 | if (ret < 0) { | |
1813 | goto end_rcu_unlock; | |
1814 | } | |
1815 | stream->index_fd = ret; | |
1816 | } | |
1817 | ||
0a6518b0 | 1818 | ret = relay_index_write(wr_index->fd, wr_index); |
1c20f0e2 JD |
1819 | if (ret < 0) { |
1820 | goto end_rcu_unlock; | |
1821 | } | |
d3e2ba59 | 1822 | stream->total_index_received++; |
1c20f0e2 JD |
1823 | } |
1824 | ||
1825 | end_rcu_unlock: | |
1826 | rcu_read_unlock(); | |
1827 | ||
1828 | if (ret < 0) { | |
1829 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1830 | } else { | |
1831 | reply.ret_code = htobe32(LTTNG_OK); | |
1832 | } | |
1833 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1834 | if (send_ret < 0) { | |
1835 | ERR("Relay sending close index id reply"); | |
1836 | ret = send_ret; | |
1837 | } | |
1838 | ||
1839 | end_no_session: | |
1840 | return ret; | |
1841 | } | |
1842 | ||
b8aa1682 | 1843 | /* |
d3e2ba59 | 1844 | * Process the commands received on the control socket |
b8aa1682 JD |
1845 | */ |
1846 | static | |
1847 | int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1848 | struct relay_command *cmd, struct relay_local_data *ctx) |
b8aa1682 JD |
1849 | { |
1850 | int ret = 0; | |
1851 | ||
1852 | switch (be32toh(recv_hdr->cmd)) { | |
b8aa1682 | 1853 | case RELAYD_CREATE_SESSION: |
d3e2ba59 | 1854 | ret = relay_create_session(recv_hdr, cmd, ctx->sessions_ht); |
b8aa1682 | 1855 | break; |
b8aa1682 | 1856 | case RELAYD_ADD_STREAM: |
d3e2ba59 | 1857 | ret = relay_add_stream(recv_hdr, cmd, ctx->sessions_ht); |
b8aa1682 JD |
1858 | break; |
1859 | case RELAYD_START_DATA: | |
1860 | ret = relay_start(recv_hdr, cmd); | |
1861 | break; | |
1862 | case RELAYD_SEND_METADATA: | |
d3e2ba59 | 1863 | ret = relay_recv_metadata(recv_hdr, cmd); |
b8aa1682 JD |
1864 | break; |
1865 | case RELAYD_VERSION: | |
d3e2ba59 | 1866 | ret = relay_send_version(recv_hdr, cmd, ctx->sessions_ht); |
b8aa1682 | 1867 | break; |
173af62f | 1868 | case RELAYD_CLOSE_STREAM: |
92c6ca54 | 1869 | ret = relay_close_stream(recv_hdr, cmd); |
173af62f | 1870 | break; |
6d805429 | 1871 | case RELAYD_DATA_PENDING: |
d3e2ba59 | 1872 | ret = relay_data_pending(recv_hdr, cmd); |
c8f59ee5 DG |
1873 | break; |
1874 | case RELAYD_QUIESCENT_CONTROL: | |
d3e2ba59 | 1875 | ret = relay_quiescent_control(recv_hdr, cmd); |
c8f59ee5 | 1876 | break; |
f7079f67 | 1877 | case RELAYD_BEGIN_DATA_PENDING: |
d3e2ba59 | 1878 | ret = relay_begin_data_pending(recv_hdr, cmd); |
f7079f67 DG |
1879 | break; |
1880 | case RELAYD_END_DATA_PENDING: | |
d3e2ba59 | 1881 | ret = relay_end_data_pending(recv_hdr, cmd); |
f7079f67 | 1882 | break; |
1c20f0e2 | 1883 | case RELAYD_SEND_INDEX: |
0a6518b0 | 1884 | ret = relay_recv_index(recv_hdr, cmd); |
1c20f0e2 | 1885 | break; |
b8aa1682 JD |
1886 | case RELAYD_UPDATE_SYNC_INFO: |
1887 | default: | |
1888 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
1889 | relay_unknown_command(cmd); | |
1890 | ret = -1; | |
1891 | goto end; | |
1892 | } | |
1893 | ||
1894 | end: | |
1895 | return ret; | |
1896 | } | |
1897 | ||
7d2f7452 DG |
1898 | /* |
1899 | * Handle index for a data stream. | |
1900 | * | |
1901 | * RCU read side lock MUST be acquired. | |
1902 | * | |
1903 | * Return 0 on success else a negative value. | |
1904 | */ | |
1905 | static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num, | |
1906 | int rotate_index) | |
1907 | { | |
1908 | int ret = 0, index_created = 0; | |
1909 | uint64_t stream_id, data_offset; | |
1910 | struct relay_index *index, *wr_index = NULL; | |
1911 | ||
1912 | assert(stream); | |
1913 | ||
1914 | stream_id = stream->stream_handle; | |
1915 | /* Get data offset because we are about to update the index. */ | |
1916 | data_offset = htobe64(stream->tracefile_size_current); | |
1917 | ||
1918 | /* | |
1919 | * Lookup for an existing index for that stream id/sequence number. If on | |
1920 | * exists, the control thread already received the data for it thus we need | |
1921 | * to write it on disk. | |
1922 | */ | |
1923 | index = relay_index_find(stream_id, net_seq_num); | |
1924 | if (!index) { | |
1925 | /* A successful creation will add the object to the HT. */ | |
1926 | index = relay_index_create(stream_id, net_seq_num); | |
1927 | if (!index) { | |
1928 | ret = -1; | |
1929 | goto error; | |
1930 | } | |
1931 | index_created = 1; | |
1932 | } | |
1933 | ||
1934 | if (rotate_index || stream->index_fd < 0) { | |
1935 | index->to_close_fd = stream->index_fd; | |
1936 | ret = index_create_file(stream->path_name, stream->channel_name, | |
1937 | relayd_uid, relayd_gid, stream->tracefile_size, | |
1938 | stream->tracefile_count_current); | |
1939 | if (ret < 0) { | |
1940 | /* This will close the stream's index fd if one. */ | |
1941 | relay_index_free_safe(index); | |
1942 | goto error; | |
1943 | } | |
1944 | stream->index_fd = ret; | |
1945 | } | |
1946 | index->fd = stream->index_fd; | |
1947 | index->index_data.offset = data_offset; | |
1948 | ||
1949 | if (index_created) { | |
1950 | /* | |
1951 | * Try to add the relay index object to the hash table. If an object | |
1952 | * already exist, destroy back the index created and set the data. | |
1953 | */ | |
1954 | relay_index_add(index, &wr_index); | |
1955 | if (wr_index) { | |
1956 | /* Copy back data from the created index. */ | |
1957 | wr_index->fd = index->fd; | |
1958 | wr_index->to_close_fd = index->to_close_fd; | |
1959 | wr_index->index_data.offset = data_offset; | |
1960 | free(index); | |
1961 | } | |
1962 | } else { | |
1963 | /* The index already exists so write it on disk. */ | |
1964 | wr_index = index; | |
1965 | } | |
1966 | ||
1967 | /* Do we have a writable ready index to write on disk. */ | |
1968 | if (wr_index) { | |
1969 | ret = relay_index_write(wr_index->fd, wr_index); | |
1970 | if (ret < 0) { | |
1971 | goto error; | |
1972 | } | |
1973 | stream->total_index_received++; | |
1974 | } | |
1975 | ||
1976 | error: | |
1977 | return ret; | |
1978 | } | |
1979 | ||
b8aa1682 JD |
1980 | /* |
1981 | * relay_process_data: Process the data received on the data socket | |
1982 | */ | |
1983 | static | |
0a6518b0 | 1984 | int relay_process_data(struct relay_command *cmd) |
b8aa1682 | 1985 | { |
7d2f7452 | 1986 | int ret = 0, rotate_index = 0; |
b8aa1682 JD |
1987 | struct relay_stream *stream; |
1988 | struct lttcomm_relayd_data_hdr data_hdr; | |
7d2f7452 | 1989 | uint64_t stream_id; |
173af62f | 1990 | uint64_t net_seq_num; |
b8aa1682 JD |
1991 | uint32_t data_size; |
1992 | ||
1993 | ret = cmd->sock->ops->recvmsg(cmd->sock, &data_hdr, | |
7c5aef62 | 1994 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 | 1995 | if (ret <= 0) { |
a6cd2b97 DG |
1996 | if (ret == 0) { |
1997 | /* Orderly shutdown. Not necessary to print an error. */ | |
1998 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1999 | } else { | |
2000 | ERR("Unable to receive data header on sock %d", cmd->sock->fd); | |
2001 | } | |
b8aa1682 JD |
2002 | ret = -1; |
2003 | goto end; | |
2004 | } | |
2005 | ||
2006 | stream_id = be64toh(data_hdr.stream_id); | |
9d1bbf21 MD |
2007 | |
2008 | rcu_read_lock(); | |
d3e2ba59 | 2009 | stream = relay_stream_find_by_id(stream_id); |
b8aa1682 JD |
2010 | if (!stream) { |
2011 | ret = -1; | |
1c20f0e2 | 2012 | goto end_rcu_unlock; |
b8aa1682 JD |
2013 | } |
2014 | ||
2015 | data_size = be32toh(data_hdr.data_size); | |
2016 | if (data_buffer_size < data_size) { | |
c617c0c6 MD |
2017 | char *tmp_data_ptr; |
2018 | ||
2019 | tmp_data_ptr = realloc(data_buffer, data_size); | |
2020 | if (!tmp_data_ptr) { | |
b8aa1682 | 2021 | ERR("Allocating data buffer"); |
c617c0c6 | 2022 | free(data_buffer); |
b8aa1682 | 2023 | ret = -1; |
1c20f0e2 | 2024 | goto end_rcu_unlock; |
b8aa1682 | 2025 | } |
c617c0c6 | 2026 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
2027 | data_buffer_size = data_size; |
2028 | } | |
2029 | memset(data_buffer, 0, data_size); | |
2030 | ||
173af62f DG |
2031 | net_seq_num = be64toh(data_hdr.net_seq_num); |
2032 | ||
77c7c900 | 2033 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 2034 | data_size, stream_id, net_seq_num); |
7c5aef62 | 2035 | ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0); |
b8aa1682 | 2036 | if (ret <= 0) { |
a6cd2b97 DG |
2037 | if (ret == 0) { |
2038 | /* Orderly shutdown. Not necessary to print an error. */ | |
2039 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
2040 | } | |
b8aa1682 | 2041 | ret = -1; |
1c20f0e2 | 2042 | goto end_rcu_unlock; |
b8aa1682 JD |
2043 | } |
2044 | ||
1c20f0e2 | 2045 | /* Check if a rotation is needed. */ |
0f907de1 JD |
2046 | if (stream->tracefile_size > 0 && |
2047 | (stream->tracefile_size_current + data_size) > | |
2048 | stream->tracefile_size) { | |
1c20f0e2 JD |
2049 | ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, |
2050 | stream->tracefile_size, stream->tracefile_count, | |
2051 | relayd_uid, relayd_gid, stream->fd, | |
2052 | &(stream->tracefile_count_current), &stream->fd); | |
0f907de1 | 2053 | if (ret < 0) { |
1c20f0e2 JD |
2054 | ERR("Rotating stream output file"); |
2055 | goto end_rcu_unlock; | |
0f907de1 | 2056 | } |
a6976990 DG |
2057 | /* Reset current size because we just perform a stream rotation. */ |
2058 | stream->tracefile_size_current = 0; | |
1c20f0e2 JD |
2059 | rotate_index = 1; |
2060 | } | |
2061 | ||
1c20f0e2 | 2062 | /* |
7d2f7452 DG |
2063 | * Index are handled in protocol version 2.4 and above. Also, snapshot and |
2064 | * index are NOT supported. | |
1c20f0e2 | 2065 | */ |
7d2f7452 DG |
2066 | if (stream->session->minor >= 4 && !stream->session->snapshot) { |
2067 | ret = handle_index_data(stream, net_seq_num, rotate_index); | |
1c20f0e2 | 2068 | if (ret < 0) { |
1c20f0e2 JD |
2069 | goto end_rcu_unlock; |
2070 | } | |
1c20f0e2 JD |
2071 | } |
2072 | ||
7d2f7452 | 2073 | /* Write data to stream output fd. */ |
6f94560a MD |
2074 | do { |
2075 | ret = write(stream->fd, data_buffer, data_size); | |
2076 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 2077 | if (ret < 0 || ret != data_size) { |
b8aa1682 JD |
2078 | ERR("Relay error writing data to file"); |
2079 | ret = -1; | |
1c20f0e2 | 2080 | goto end_rcu_unlock; |
b8aa1682 | 2081 | } |
1d4dfdef | 2082 | |
5ab7344e JD |
2083 | DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64, |
2084 | ret, stream->stream_handle); | |
2085 | ||
1d4dfdef DG |
2086 | ret = write_padding_to_file(stream->fd, be32toh(data_hdr.padding_size)); |
2087 | if (ret < 0) { | |
1c20f0e2 | 2088 | goto end_rcu_unlock; |
1d4dfdef | 2089 | } |
1c20f0e2 | 2090 | stream->tracefile_size_current += data_size + be32toh(data_hdr.padding_size); |
1d4dfdef | 2091 | |
173af62f DG |
2092 | stream->prev_seq = net_seq_num; |
2093 | ||
2094 | /* Check if we need to close the FD */ | |
2095 | if (close_stream_check(stream)) { | |
c07d8a78 | 2096 | destroy_stream(stream); |
173af62f DG |
2097 | } |
2098 | ||
1c20f0e2 | 2099 | end_rcu_unlock: |
9d1bbf21 | 2100 | rcu_read_unlock(); |
b8aa1682 JD |
2101 | end: |
2102 | return ret; | |
2103 | } | |
2104 | ||
2105 | static | |
9d1bbf21 | 2106 | void relay_cleanup_poll_connection(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
2107 | { |
2108 | int ret; | |
2109 | ||
b8aa1682 JD |
2110 | lttng_poll_del(events, pollfd); |
2111 | ||
2112 | ret = close(pollfd); | |
2113 | if (ret < 0) { | |
2114 | ERR("Closing pollfd %d", pollfd); | |
2115 | } | |
2116 | } | |
2117 | ||
2118 | static | |
2119 | int relay_add_connection(int fd, struct lttng_poll_event *events, | |
2120 | struct lttng_ht *relay_connections_ht) | |
2121 | { | |
b8aa1682 | 2122 | struct relay_command *relay_connection; |
9d1bbf21 | 2123 | int ret; |
b8aa1682 JD |
2124 | |
2125 | relay_connection = zmalloc(sizeof(struct relay_command)); | |
2126 | if (relay_connection == NULL) { | |
2127 | PERROR("Relay command zmalloc"); | |
9d1bbf21 | 2128 | goto error; |
b8aa1682 | 2129 | } |
f921c78f DG |
2130 | do { |
2131 | ret = read(fd, relay_connection, sizeof(struct relay_command)); | |
2132 | } while (ret < 0 && errno == EINTR); | |
cdf0f8fc | 2133 | if (ret < 0 || ret < sizeof(struct relay_command)) { |
b8aa1682 | 2134 | PERROR("read relay cmd pipe"); |
9d1bbf21 | 2135 | goto error_read; |
b8aa1682 JD |
2136 | } |
2137 | ||
c07d8a78 DG |
2138 | /* |
2139 | * Only used by the control side and the reference is copied inside each | |
2140 | * stream from that connection. Thus a destroy HT must be done after every | |
2141 | * stream has been destroyed. | |
2142 | */ | |
2143 | if (relay_connection->type == RELAY_CONTROL) { | |
2144 | relay_connection->ctf_traces_ht = lttng_ht_new(0, | |
2145 | LTTNG_HT_TYPE_STRING); | |
2146 | if (!relay_connection->ctf_traces_ht) { | |
2147 | goto error_read; | |
2148 | } | |
d3e2ba59 JD |
2149 | } |
2150 | ||
b8aa1682 JD |
2151 | lttng_ht_node_init_ulong(&relay_connection->sock_n, |
2152 | (unsigned long) relay_connection->sock->fd); | |
9d1bbf21 | 2153 | rcu_read_lock(); |
b8aa1682 JD |
2154 | lttng_ht_add_unique_ulong(relay_connections_ht, |
2155 | &relay_connection->sock_n); | |
9d1bbf21 MD |
2156 | rcu_read_unlock(); |
2157 | return lttng_poll_add(events, | |
b8aa1682 JD |
2158 | relay_connection->sock->fd, |
2159 | LPOLLIN | LPOLLRDHUP); | |
2160 | ||
9d1bbf21 MD |
2161 | error_read: |
2162 | free(relay_connection); | |
2163 | error: | |
2164 | return -1; | |
2165 | } | |
2166 | ||
2167 | static | |
2168 | void deferred_free_connection(struct rcu_head *head) | |
2169 | { | |
2170 | struct relay_command *relay_connection = | |
2171 | caa_container_of(head, struct relay_command, rcu_node); | |
5b6d8097 DG |
2172 | |
2173 | lttcomm_destroy_sock(relay_connection->sock); | |
9d1bbf21 MD |
2174 | free(relay_connection); |
2175 | } | |
2176 | ||
2177 | static | |
2178 | void relay_del_connection(struct lttng_ht *relay_connections_ht, | |
d3e2ba59 JD |
2179 | struct lttng_ht_iter *iter, struct relay_command *relay_connection, |
2180 | struct lttng_ht *sessions_ht) | |
9d1bbf21 MD |
2181 | { |
2182 | int ret; | |
2183 | ||
2184 | ret = lttng_ht_del(relay_connections_ht, iter); | |
2185 | assert(!ret); | |
c07d8a78 | 2186 | |
9d1bbf21 | 2187 | if (relay_connection->type == RELAY_CONTROL) { |
d3e2ba59 | 2188 | relay_delete_session(relay_connection, sessions_ht); |
c07d8a78 | 2189 | lttng_ht_destroy(relay_connection->ctf_traces_ht); |
9d1bbf21 | 2190 | } |
5b6d8097 | 2191 | |
c07d8a78 | 2192 | call_rcu(&relay_connection->rcu_node, deferred_free_connection); |
b8aa1682 JD |
2193 | } |
2194 | ||
2195 | /* | |
2196 | * This thread does the actual work | |
2197 | */ | |
2198 | static | |
2199 | void *relay_thread_worker(void *data) | |
2200 | { | |
beaad64c DG |
2201 | int ret, err = -1, last_seen_data_fd = -1; |
2202 | uint32_t nb_fd; | |
b8aa1682 JD |
2203 | struct relay_command *relay_connection; |
2204 | struct lttng_poll_event events; | |
2205 | struct lttng_ht *relay_connections_ht; | |
2206 | struct lttng_ht_node_ulong *node; | |
2207 | struct lttng_ht_iter iter; | |
b8aa1682 | 2208 | struct lttcomm_relayd_hdr recv_hdr; |
d3e2ba59 JD |
2209 | struct relay_local_data *relay_ctx = (struct relay_local_data *) data; |
2210 | struct lttng_ht *sessions_ht = relay_ctx->sessions_ht; | |
b8aa1682 JD |
2211 | |
2212 | DBG("[thread] Relay worker started"); | |
2213 | ||
9d1bbf21 MD |
2214 | rcu_register_thread(); |
2215 | ||
55706a7d MD |
2216 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
2217 | ||
f385ae0a MD |
2218 | health_code_update(); |
2219 | ||
b8aa1682 JD |
2220 | /* table of connections indexed on socket */ |
2221 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2222 | if (!relay_connections_ht) { |
2223 | goto relay_connections_ht_error; | |
2224 | } | |
b8aa1682 | 2225 | |
1c20f0e2 JD |
2226 | /* Tables of received indexes indexed by index handle and net_seq_num. */ |
2227 | indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64); | |
2228 | if (!indexes_ht) { | |
2229 | goto indexes_ht_error; | |
2230 | } | |
2231 | ||
b8aa1682 JD |
2232 | ret = create_thread_poll_set(&events, 2); |
2233 | if (ret < 0) { | |
2234 | goto error_poll_create; | |
2235 | } | |
2236 | ||
2237 | ret = lttng_poll_add(&events, relay_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); | |
2238 | if (ret < 0) { | |
2239 | goto error; | |
2240 | } | |
2241 | ||
beaad64c | 2242 | restart: |
b8aa1682 | 2243 | while (1) { |
beaad64c DG |
2244 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2245 | ||
f385ae0a MD |
2246 | health_code_update(); |
2247 | ||
b8aa1682 | 2248 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2249 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 2250 | health_poll_entry(); |
b8aa1682 | 2251 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 2252 | health_poll_exit(); |
b8aa1682 JD |
2253 | if (ret < 0) { |
2254 | /* | |
2255 | * Restart interrupted system call. | |
2256 | */ | |
2257 | if (errno == EINTR) { | |
2258 | goto restart; | |
2259 | } | |
2260 | goto error; | |
2261 | } | |
2262 | ||
0d9c5d77 DG |
2263 | nb_fd = ret; |
2264 | ||
beaad64c DG |
2265 | /* |
2266 | * Process control. The control connection is prioritised so we don't | |
2267 | * starve it with high throughout put tracing data on the data | |
2268 | * connection. | |
2269 | */ | |
b8aa1682 JD |
2270 | for (i = 0; i < nb_fd; i++) { |
2271 | /* Fetch once the poll data */ | |
beaad64c DG |
2272 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2273 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 2274 | |
f385ae0a MD |
2275 | health_code_update(); |
2276 | ||
b8aa1682 JD |
2277 | /* Thread quit pipe has been closed. Killing thread. */ |
2278 | ret = check_thread_quit_pipe(pollfd, revents); | |
2279 | if (ret) { | |
095a4ae5 MD |
2280 | err = 0; |
2281 | goto exit; | |
b8aa1682 JD |
2282 | } |
2283 | ||
2284 | /* Inspect the relay cmd pipe for new connection */ | |
2285 | if (pollfd == relay_cmd_pipe[0]) { | |
2286 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2287 | ERR("Relay pipe error"); | |
2288 | goto error; | |
2289 | } else if (revents & LPOLLIN) { | |
2290 | DBG("Relay command received"); | |
2291 | ret = relay_add_connection(relay_cmd_pipe[0], | |
2292 | &events, relay_connections_ht); | |
2293 | if (ret < 0) { | |
2294 | goto error; | |
2295 | } | |
2296 | } | |
beaad64c | 2297 | } else if (revents) { |
9d1bbf21 | 2298 | rcu_read_lock(); |
b8aa1682 JD |
2299 | lttng_ht_lookup(relay_connections_ht, |
2300 | (void *)((unsigned long) pollfd), | |
2301 | &iter); | |
2302 | node = lttng_ht_iter_get_node_ulong(&iter); | |
2303 | if (node == NULL) { | |
2304 | DBG2("Relay sock %d not found", pollfd); | |
9d1bbf21 | 2305 | rcu_read_unlock(); |
b8aa1682 JD |
2306 | goto error; |
2307 | } | |
2308 | relay_connection = caa_container_of(node, | |
2309 | struct relay_command, sock_n); | |
2310 | ||
2311 | if (revents & (LPOLLERR)) { | |
2312 | ERR("POLL ERROR"); | |
9d1bbf21 MD |
2313 | relay_cleanup_poll_connection(&events, pollfd); |
2314 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2315 | &iter, relay_connection, sessions_ht); |
beaad64c DG |
2316 | if (last_seen_data_fd == pollfd) { |
2317 | last_seen_data_fd = last_notdel_data_fd; | |
2318 | } | |
b8aa1682 JD |
2319 | } else if (revents & (LPOLLHUP | LPOLLRDHUP)) { |
2320 | DBG("Socket %d hung up", pollfd); | |
9d1bbf21 MD |
2321 | relay_cleanup_poll_connection(&events, pollfd); |
2322 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2323 | &iter, relay_connection, sessions_ht); |
beaad64c DG |
2324 | if (last_seen_data_fd == pollfd) { |
2325 | last_seen_data_fd = last_notdel_data_fd; | |
2326 | } | |
b8aa1682 JD |
2327 | } else if (revents & LPOLLIN) { |
2328 | /* control socket */ | |
2329 | if (relay_connection->type == RELAY_CONTROL) { | |
2330 | ret = relay_connection->sock->ops->recvmsg( | |
2331 | relay_connection->sock, &recv_hdr, | |
7c5aef62 | 2332 | sizeof(struct lttcomm_relayd_hdr), 0); |
b8aa1682 JD |
2333 | /* connection closed */ |
2334 | if (ret <= 0) { | |
9d1bbf21 MD |
2335 | relay_cleanup_poll_connection(&events, pollfd); |
2336 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2337 | &iter, relay_connection, sessions_ht); |
b8aa1682 JD |
2338 | DBG("Control connection closed with %d", pollfd); |
2339 | } else { | |
2340 | if (relay_connection->session) { | |
77c7c900 | 2341 | DBG2("Relay worker receiving data for session : %" PRIu64, |
b8aa1682 JD |
2342 | relay_connection->session->id); |
2343 | } | |
2344 | ret = relay_process_control(&recv_hdr, | |
d3e2ba59 | 2345 | relay_connection, relay_ctx); |
b8aa1682 | 2346 | if (ret < 0) { |
beaad64c | 2347 | /* Clear the session on error. */ |
9d1bbf21 MD |
2348 | relay_cleanup_poll_connection(&events, pollfd); |
2349 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2350 | &iter, relay_connection, sessions_ht); |
b8aa1682 JD |
2351 | DBG("Connection closed with %d", pollfd); |
2352 | } | |
beaad64c | 2353 | seen_control = 1; |
b8aa1682 | 2354 | } |
beaad64c DG |
2355 | } else { |
2356 | /* | |
2357 | * Flag the last seen data fd not deleted. It will be | |
2358 | * used as the last seen fd if any fd gets deleted in | |
2359 | * this first loop. | |
2360 | */ | |
2361 | last_notdel_data_fd = pollfd; | |
2362 | } | |
2363 | } | |
2364 | rcu_read_unlock(); | |
2365 | } | |
2366 | } | |
2367 | ||
2368 | /* | |
2369 | * The last loop handled a control request, go back to poll to make | |
2370 | * sure we prioritise the control socket. | |
2371 | */ | |
2372 | if (seen_control) { | |
2373 | continue; | |
2374 | } | |
2375 | ||
2376 | if (last_seen_data_fd >= 0) { | |
2377 | for (i = 0; i < nb_fd; i++) { | |
2378 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
2379 | |
2380 | health_code_update(); | |
2381 | ||
beaad64c DG |
2382 | if (last_seen_data_fd == pollfd) { |
2383 | idx = i; | |
2384 | break; | |
2385 | } | |
2386 | } | |
2387 | } | |
2388 | ||
2389 | /* Process data connection. */ | |
2390 | for (i = idx + 1; i < nb_fd; i++) { | |
2391 | /* Fetch the poll data. */ | |
2392 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2393 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2394 | ||
f385ae0a MD |
2395 | health_code_update(); |
2396 | ||
beaad64c DG |
2397 | /* Skip the command pipe. It's handled in the first loop. */ |
2398 | if (pollfd == relay_cmd_pipe[0]) { | |
2399 | continue; | |
2400 | } | |
2401 | ||
2402 | if (revents) { | |
2403 | rcu_read_lock(); | |
2404 | lttng_ht_lookup(relay_connections_ht, | |
2405 | (void *)((unsigned long) pollfd), | |
2406 | &iter); | |
2407 | node = lttng_ht_iter_get_node_ulong(&iter); | |
2408 | if (node == NULL) { | |
2409 | /* Skip it. Might be removed before. */ | |
2410 | rcu_read_unlock(); | |
2411 | continue; | |
2412 | } | |
2413 | relay_connection = caa_container_of(node, | |
2414 | struct relay_command, sock_n); | |
2415 | ||
2416 | if (revents & LPOLLIN) { | |
2417 | if (relay_connection->type != RELAY_DATA) { | |
2418 | continue; | |
2419 | } | |
2420 | ||
0a6518b0 | 2421 | ret = relay_process_data(relay_connection); |
beaad64c DG |
2422 | /* connection closed */ |
2423 | if (ret < 0) { | |
2424 | relay_cleanup_poll_connection(&events, pollfd); | |
2425 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2426 | &iter, relay_connection, sessions_ht); |
beaad64c DG |
2427 | DBG("Data connection closed with %d", pollfd); |
2428 | /* | |
2429 | * Every goto restart call sets the last seen fd where | |
2430 | * here we don't really care since we gracefully | |
2431 | * continue the loop after the connection is deleted. | |
2432 | */ | |
2433 | } else { | |
2434 | /* Keep last seen port. */ | |
2435 | last_seen_data_fd = pollfd; | |
2436 | rcu_read_unlock(); | |
2437 | goto restart; | |
b8aa1682 JD |
2438 | } |
2439 | } | |
9d1bbf21 | 2440 | rcu_read_unlock(); |
b8aa1682 JD |
2441 | } |
2442 | } | |
beaad64c | 2443 | last_seen_data_fd = -1; |
b8aa1682 JD |
2444 | } |
2445 | ||
f385ae0a MD |
2446 | /* Normal exit, no error */ |
2447 | ret = 0; | |
2448 | ||
095a4ae5 | 2449 | exit: |
b8aa1682 JD |
2450 | error: |
2451 | lttng_poll_clean(&events); | |
2452 | ||
2453 | /* empty the hash table and free the memory */ | |
9d1bbf21 | 2454 | rcu_read_lock(); |
b8aa1682 | 2455 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, node, node) { |
f385ae0a MD |
2456 | health_code_update(); |
2457 | ||
b8aa1682 JD |
2458 | node = lttng_ht_iter_get_node_ulong(&iter); |
2459 | if (node) { | |
2460 | relay_connection = caa_container_of(node, | |
2461 | struct relay_command, sock_n); | |
9d1bbf21 | 2462 | relay_del_connection(relay_connections_ht, |
d3e2ba59 | 2463 | &iter, relay_connection, sessions_ht); |
b8aa1682 | 2464 | } |
b8aa1682 | 2465 | } |
94d49140 | 2466 | rcu_read_unlock(); |
7d2f7452 DG |
2467 | error_poll_create: |
2468 | lttng_ht_destroy(indexes_ht); | |
1c20f0e2 | 2469 | indexes_ht_error: |
b8aa1682 | 2470 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 2471 | relay_connections_ht_error: |
6620da75 DG |
2472 | /* Close relay cmd pipes */ |
2473 | utils_close_pipe(relay_cmd_pipe); | |
095a4ae5 MD |
2474 | if (err) { |
2475 | DBG("Thread exited with error"); | |
2476 | } | |
b8aa1682 | 2477 | DBG("Worker thread cleanup complete"); |
095a4ae5 | 2478 | free(data_buffer); |
f385ae0a MD |
2479 | if (err) { |
2480 | health_error(); | |
2481 | ERR("Health error occurred in %s", __func__); | |
2482 | } | |
2483 | health_unregister(health_relayd); | |
9d1bbf21 | 2484 | rcu_unregister_thread(); |
f385ae0a | 2485 | stop_threads(); |
b8aa1682 JD |
2486 | return NULL; |
2487 | } | |
2488 | ||
2489 | /* | |
2490 | * Create the relay command pipe to wake thread_manage_apps. | |
2491 | * Closed in cleanup(). | |
2492 | */ | |
2493 | static int create_relay_cmd_pipe(void) | |
2494 | { | |
a02de639 | 2495 | int ret; |
b8aa1682 | 2496 | |
a02de639 | 2497 | ret = utils_create_pipe_cloexec(relay_cmd_pipe); |
b8aa1682 | 2498 | |
b8aa1682 JD |
2499 | return ret; |
2500 | } | |
2501 | ||
2502 | /* | |
2503 | * main | |
2504 | */ | |
2505 | int main(int argc, char **argv) | |
2506 | { | |
2507 | int ret = 0; | |
2508 | void *status; | |
d3e2ba59 | 2509 | struct relay_local_data *relay_ctx; |
b8aa1682 JD |
2510 | |
2511 | /* Create thread quit pipe */ | |
2512 | if ((ret = init_thread_quit_pipe()) < 0) { | |
2513 | goto error; | |
2514 | } | |
2515 | ||
2516 | /* Parse arguments */ | |
2517 | progname = argv[0]; | |
c617c0c6 | 2518 | if ((ret = parse_args(argc, argv)) < 0) { |
a02de639 | 2519 | goto exit; |
b8aa1682 JD |
2520 | } |
2521 | ||
2522 | if ((ret = set_signal_handler()) < 0) { | |
2523 | goto exit; | |
2524 | } | |
2525 | ||
4d513a50 DG |
2526 | /* Try to create directory if -o, --output is specified. */ |
2527 | if (opt_output_path) { | |
994fa64f DG |
2528 | if (*opt_output_path != '/') { |
2529 | ERR("Please specify an absolute path for -o, --output PATH"); | |
2530 | goto exit; | |
2531 | } | |
2532 | ||
4d513a50 DG |
2533 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG); |
2534 | if (ret < 0) { | |
2535 | ERR("Unable to create %s", opt_output_path); | |
2536 | goto exit; | |
2537 | } | |
2538 | } | |
2539 | ||
b8aa1682 JD |
2540 | /* Daemonize */ |
2541 | if (opt_daemon) { | |
2542 | ret = daemon(0, 0); | |
2543 | if (ret < 0) { | |
2544 | PERROR("daemon"); | |
a02de639 | 2545 | goto exit; |
b8aa1682 JD |
2546 | } |
2547 | } | |
2548 | ||
1c20f0e2 JD |
2549 | /* We need those values for the file/dir creation. */ |
2550 | relayd_uid = getuid(); | |
2551 | relayd_gid = getgid(); | |
b8aa1682 | 2552 | |
1c20f0e2 JD |
2553 | /* Check if daemon is UID = 0 */ |
2554 | if (relayd_uid == 0) { | |
b8aa1682 JD |
2555 | if (control_uri->port < 1024 || data_uri->port < 1024) { |
2556 | ERR("Need to be root to use ports < 1024"); | |
2557 | ret = -1; | |
a02de639 | 2558 | goto exit; |
b8aa1682 JD |
2559 | } |
2560 | } | |
2561 | ||
2562 | /* Setup the thread apps communication pipe. */ | |
2563 | if ((ret = create_relay_cmd_pipe()) < 0) { | |
2564 | goto exit; | |
2565 | } | |
2566 | ||
2567 | /* Init relay command queue. */ | |
2568 | cds_wfq_init(&relay_cmd_queue.queue); | |
2569 | ||
2570 | /* Set up max poll set size */ | |
2571 | lttng_poll_set_max_size(); | |
2572 | ||
554831e7 MD |
2573 | /* Initialize communication library */ |
2574 | lttcomm_init(); | |
2575 | ||
d3e2ba59 JD |
2576 | relay_ctx = zmalloc(sizeof(struct relay_local_data)); |
2577 | if (!relay_ctx) { | |
2578 | PERROR("relay_ctx"); | |
2579 | goto exit; | |
2580 | } | |
2581 | ||
2582 | /* tables of sessions indexed by session ID */ | |
2583 | relay_ctx->sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
2584 | if (!relay_ctx->sessions_ht) { | |
2585 | goto exit_relay_ctx_sessions; | |
2586 | } | |
2587 | ||
2588 | /* tables of streams indexed by stream ID */ | |
2589 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
2590 | if (!relay_streams_ht) { | |
2591 | goto exit_relay_ctx_streams; | |
2592 | } | |
2593 | ||
2594 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
2595 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2596 | if (!viewer_streams_ht) { | |
d3e2ba59 JD |
2597 | goto exit_relay_ctx_viewer_streams; |
2598 | } | |
2599 | ||
55706a7d MD |
2600 | /* Initialize thread health monitoring */ |
2601 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
2602 | if (!health_relayd) { | |
2603 | PERROR("health_app_create error"); | |
2604 | goto exit_health_app_create; | |
2605 | } | |
2606 | ||
65931c8b MD |
2607 | ret = utils_create_pipe(health_quit_pipe); |
2608 | if (ret < 0) { | |
2609 | goto error_health_pipe; | |
2610 | } | |
2611 | ||
2612 | /* Create thread to manage the client socket */ | |
2613 | ret = pthread_create(&health_thread, NULL, | |
2614 | thread_manage_health, (void *) NULL); | |
2615 | if (ret != 0) { | |
2616 | PERROR("pthread_create health"); | |
2617 | goto health_error; | |
2618 | } | |
2619 | ||
b8aa1682 JD |
2620 | /* Setup the dispatcher thread */ |
2621 | ret = pthread_create(&dispatcher_thread, NULL, | |
2622 | relay_thread_dispatcher, (void *) NULL); | |
2623 | if (ret != 0) { | |
2624 | PERROR("pthread_create dispatcher"); | |
2625 | goto exit_dispatcher; | |
2626 | } | |
2627 | ||
2628 | /* Setup the worker thread */ | |
2629 | ret = pthread_create(&worker_thread, NULL, | |
d3e2ba59 | 2630 | relay_thread_worker, (void *) relay_ctx); |
b8aa1682 JD |
2631 | if (ret != 0) { |
2632 | PERROR("pthread_create worker"); | |
2633 | goto exit_worker; | |
2634 | } | |
2635 | ||
2636 | /* Setup the listener thread */ | |
2637 | ret = pthread_create(&listener_thread, NULL, | |
2638 | relay_thread_listener, (void *) NULL); | |
2639 | if (ret != 0) { | |
2640 | PERROR("pthread_create listener"); | |
2641 | goto exit_listener; | |
2642 | } | |
2643 | ||
42415026 | 2644 | ret = live_start_threads(live_uri, relay_ctx, thread_quit_pipe); |
d3e2ba59 JD |
2645 | if (ret != 0) { |
2646 | ERR("Starting live viewer threads"); | |
50138f51 | 2647 | goto exit_live; |
d3e2ba59 JD |
2648 | } |
2649 | ||
50138f51 | 2650 | exit_live: |
b8aa1682 JD |
2651 | ret = pthread_join(listener_thread, &status); |
2652 | if (ret != 0) { | |
2653 | PERROR("pthread_join"); | |
2654 | goto error; /* join error, exit without cleanup */ | |
2655 | } | |
2656 | ||
50138f51 | 2657 | exit_listener: |
b8aa1682 JD |
2658 | ret = pthread_join(worker_thread, &status); |
2659 | if (ret != 0) { | |
2660 | PERROR("pthread_join"); | |
2661 | goto error; /* join error, exit without cleanup */ | |
2662 | } | |
2663 | ||
50138f51 | 2664 | exit_worker: |
b8aa1682 JD |
2665 | ret = pthread_join(dispatcher_thread, &status); |
2666 | if (ret != 0) { | |
2667 | PERROR("pthread_join"); | |
2668 | goto error; /* join error, exit without cleanup */ | |
2669 | } | |
42415026 | 2670 | |
50138f51 | 2671 | exit_dispatcher: |
65931c8b MD |
2672 | ret = pthread_join(health_thread, &status); |
2673 | if (ret != 0) { | |
2674 | PERROR("pthread_join health thread"); | |
2675 | goto error; /* join error, exit without cleanup */ | |
2676 | } | |
2677 | ||
bd11e201 MD |
2678 | /* |
2679 | * Stop live threads only after joining other threads. | |
2680 | */ | |
2681 | live_stop_threads(); | |
2682 | ||
65931c8b MD |
2683 | health_error: |
2684 | utils_close_pipe(health_quit_pipe); | |
2685 | ||
2686 | error_health_pipe: | |
55706a7d MD |
2687 | health_app_destroy(health_relayd); |
2688 | ||
2689 | exit_health_app_create: | |
92c6ca54 | 2690 | lttng_ht_destroy(viewer_streams_ht); |
d3e2ba59 JD |
2691 | |
2692 | exit_relay_ctx_viewer_streams: | |
2693 | lttng_ht_destroy(relay_streams_ht); | |
2694 | ||
2695 | exit_relay_ctx_streams: | |
2696 | lttng_ht_destroy(relay_ctx->sessions_ht); | |
2697 | ||
2698 | exit_relay_ctx_sessions: | |
2699 | free(relay_ctx); | |
b8aa1682 JD |
2700 | |
2701 | exit: | |
2702 | cleanup(); | |
2703 | if (!ret) { | |
2704 | exit(EXIT_SUCCESS); | |
2705 | } | |
a02de639 | 2706 | |
b8aa1682 JD |
2707 | error: |
2708 | exit(EXIT_FAILURE); | |
2709 | } |