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> | |
50 | #include <common/hashtable/hashtable.h> | |
51 | #include <common/sessiond-comm/relayd.h> | |
52 | #include <common/uri.h> | |
a02de639 | 53 | #include <common/utils.h> |
b8aa1682 JD |
54 | |
55 | #include "lttng-relayd.h" | |
56 | ||
57 | /* command line options */ | |
58 | static int opt_daemon; | |
59 | static char *opt_output_path; | |
095a4ae5 MD |
60 | static struct lttng_uri *control_uri; |
61 | static struct lttng_uri *data_uri; | |
b8aa1682 JD |
62 | |
63 | const char *progname; | |
64 | static int is_root; /* Set to 1 if the daemon is running as root */ | |
65 | ||
66 | /* | |
67 | * Quit pipe for all threads. This permits a single cancellation point | |
68 | * for all threads when receiving an event on the pipe. | |
69 | */ | |
70 | static int thread_quit_pipe[2] = { -1, -1 }; | |
71 | ||
72 | /* | |
73 | * This pipe is used to inform the worker thread that a command is queued and | |
74 | * ready to be processed. | |
75 | */ | |
76 | static int relay_cmd_pipe[2] = { -1, -1 }; | |
77 | ||
26c9d55e | 78 | /* Shared between threads */ |
b8aa1682 JD |
79 | static int dispatch_thread_exit; |
80 | ||
81 | static pthread_t listener_thread; | |
82 | static pthread_t dispatcher_thread; | |
83 | static pthread_t worker_thread; | |
84 | ||
095a4ae5 MD |
85 | static uint64_t last_relay_stream_id; |
86 | static uint64_t last_relay_session_id; | |
b8aa1682 JD |
87 | |
88 | /* | |
89 | * Relay command queue. | |
90 | * | |
91 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
92 | * queue. | |
93 | */ | |
94 | static struct relay_cmd_queue relay_cmd_queue; | |
95 | ||
96 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
97 | static char *data_buffer; |
98 | static unsigned int data_buffer_size; | |
b8aa1682 JD |
99 | |
100 | /* | |
101 | * usage function on stderr | |
102 | */ | |
103 | static | |
104 | void usage(void) | |
105 | { | |
106 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); | |
107 | fprintf(stderr, " -h, --help Display this usage.\n"); | |
108 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
109 | fprintf(stderr, " -C, --control-port Control port listening (URI)\n"); | |
110 | fprintf(stderr, " -D, --data-port Data port listening (URI)\n"); | |
25672d02 | 111 | fprintf(stderr, " -o, --output Output path for traces (PATH)\n"); |
b8aa1682 JD |
112 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); |
113 | } | |
114 | ||
115 | static | |
116 | int parse_args(int argc, char **argv) | |
117 | { | |
118 | int c; | |
119 | int ret = 0; | |
120 | char *default_address; | |
121 | ||
122 | static struct option long_options[] = { | |
e3678fd8 MD |
123 | { "control-port", 1, 0, 'C', }, |
124 | { "data-port", 1, 0, 'D', }, | |
125 | { "daemonize", 0, 0, 'd', }, | |
126 | { "help", 0, 0, 'h', }, | |
127 | { "output", 1, 0, 'o', }, | |
128 | { "verbose", 0, 0, 'v', }, | |
095a4ae5 | 129 | { NULL, 0, 0, 0, }, |
b8aa1682 JD |
130 | }; |
131 | ||
132 | while (1) { | |
133 | int option_index = 0; | |
134 | c = getopt_long(argc, argv, "dhv" "C:D:o:", | |
135 | long_options, &option_index); | |
136 | if (c == -1) { | |
137 | break; | |
138 | } | |
139 | ||
140 | switch (c) { | |
141 | case 0: | |
142 | fprintf(stderr, "option %s", long_options[option_index].name); | |
143 | if (optarg) { | |
144 | fprintf(stderr, " with arg %s\n", optarg); | |
145 | } | |
146 | break; | |
147 | case 'C': | |
148 | ret = uri_parse(optarg, &control_uri); | |
149 | if (ret < 0) { | |
150 | ERR("Invalid control URI specified"); | |
151 | goto exit; | |
152 | } | |
153 | if (control_uri->port == 0) { | |
154 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
155 | } | |
156 | break; | |
157 | case 'D': | |
158 | ret = uri_parse(optarg, &data_uri); | |
159 | if (ret < 0) { | |
160 | ERR("Invalid data URI specified"); | |
161 | goto exit; | |
162 | } | |
163 | if (data_uri->port == 0) { | |
164 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
165 | } | |
166 | break; | |
167 | case 'd': | |
168 | opt_daemon = 1; | |
169 | break; | |
170 | case 'h': | |
171 | usage(); | |
172 | exit(EXIT_FAILURE); | |
173 | case 'o': | |
174 | ret = asprintf(&opt_output_path, "%s", optarg); | |
175 | if (ret < 0) { | |
176 | PERROR("asprintf opt_output_path"); | |
177 | goto exit; | |
178 | } | |
179 | break; | |
180 | case 'v': | |
181 | /* Verbose level can increase using multiple -v */ | |
182 | lttng_opt_verbose += 1; | |
183 | break; | |
184 | default: | |
185 | /* Unknown option or other error. | |
186 | * Error is printed by getopt, just return */ | |
187 | ret = -1; | |
188 | goto exit; | |
189 | } | |
190 | } | |
191 | ||
192 | /* assign default values */ | |
193 | if (control_uri == NULL) { | |
194 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
195 | DEFAULT_NETWORK_CONTROL_PORT); | |
196 | if (ret < 0) { | |
197 | PERROR("asprintf default data address"); | |
198 | goto exit; | |
199 | } | |
200 | ||
201 | ret = uri_parse(default_address, &control_uri); | |
202 | free(default_address); | |
203 | if (ret < 0) { | |
204 | ERR("Invalid control URI specified"); | |
205 | goto exit; | |
206 | } | |
207 | } | |
208 | if (data_uri == NULL) { | |
209 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
210 | DEFAULT_NETWORK_DATA_PORT); | |
211 | if (ret < 0) { | |
212 | PERROR("asprintf default data address"); | |
213 | goto exit; | |
214 | } | |
215 | ||
216 | ret = uri_parse(default_address, &data_uri); | |
217 | free(default_address); | |
218 | if (ret < 0) { | |
219 | ERR("Invalid data URI specified"); | |
220 | goto exit; | |
221 | } | |
222 | } | |
223 | ||
224 | exit: | |
225 | return ret; | |
226 | } | |
227 | ||
228 | /* | |
229 | * Cleanup the daemon | |
230 | */ | |
231 | static | |
232 | void cleanup(void) | |
233 | { | |
b8aa1682 JD |
234 | DBG("Cleaning up"); |
235 | ||
095a4ae5 MD |
236 | /* free the dynamically allocated opt_output_path */ |
237 | free(opt_output_path); | |
238 | ||
a02de639 CB |
239 | /* Close thread quit pipes */ |
240 | utils_close_pipe(thread_quit_pipe); | |
241 | ||
710c1f73 DG |
242 | uri_free(control_uri); |
243 | uri_free(data_uri); | |
b8aa1682 JD |
244 | } |
245 | ||
246 | /* | |
247 | * Write to writable pipe used to notify a thread. | |
248 | */ | |
249 | static | |
250 | int notify_thread_pipe(int wpipe) | |
251 | { | |
252 | int ret; | |
253 | ||
6f94560a MD |
254 | do { |
255 | ret = write(wpipe, "!", 1); | |
256 | } while (ret < 0 && errno == EINTR); | |
b8aa1682 JD |
257 | if (ret < 0) { |
258 | PERROR("write poll pipe"); | |
259 | } | |
260 | ||
261 | return ret; | |
262 | } | |
263 | ||
264 | /* | |
265 | * Stop all threads by closing the thread quit pipe. | |
266 | */ | |
267 | static | |
268 | void stop_threads(void) | |
269 | { | |
270 | int ret; | |
271 | ||
272 | /* Stopping all threads */ | |
273 | DBG("Terminating all threads"); | |
274 | ret = notify_thread_pipe(thread_quit_pipe[1]); | |
275 | if (ret < 0) { | |
276 | ERR("write error on thread quit pipe"); | |
277 | } | |
278 | ||
279 | /* Dispatch thread */ | |
26c9d55e | 280 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
b8aa1682 JD |
281 | futex_nto1_wake(&relay_cmd_queue.futex); |
282 | } | |
283 | ||
284 | /* | |
285 | * Signal handler for the daemon | |
286 | * | |
287 | * Simply stop all worker threads, leaving main() return gracefully after | |
288 | * joining all threads and calling cleanup(). | |
289 | */ | |
290 | static | |
291 | void sighandler(int sig) | |
292 | { | |
293 | switch (sig) { | |
294 | case SIGPIPE: | |
295 | DBG("SIGPIPE caught"); | |
296 | return; | |
297 | case SIGINT: | |
298 | DBG("SIGINT caught"); | |
299 | stop_threads(); | |
300 | break; | |
301 | case SIGTERM: | |
302 | DBG("SIGTERM caught"); | |
303 | stop_threads(); | |
304 | break; | |
305 | default: | |
306 | break; | |
307 | } | |
308 | } | |
309 | ||
310 | /* | |
311 | * Setup signal handler for : | |
312 | * SIGINT, SIGTERM, SIGPIPE | |
313 | */ | |
314 | static | |
315 | int set_signal_handler(void) | |
316 | { | |
317 | int ret = 0; | |
318 | struct sigaction sa; | |
319 | sigset_t sigset; | |
320 | ||
321 | if ((ret = sigemptyset(&sigset)) < 0) { | |
322 | PERROR("sigemptyset"); | |
323 | return ret; | |
324 | } | |
325 | ||
326 | sa.sa_handler = sighandler; | |
327 | sa.sa_mask = sigset; | |
328 | sa.sa_flags = 0; | |
329 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
330 | PERROR("sigaction"); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
335 | PERROR("sigaction"); | |
336 | return ret; | |
337 | } | |
338 | ||
339 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
340 | PERROR("sigaction"); | |
341 | return ret; | |
342 | } | |
343 | ||
344 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); | |
345 | ||
346 | return ret; | |
347 | } | |
348 | ||
349 | /* | |
350 | * Init thread quit pipe. | |
351 | * | |
352 | * Return -1 on error or 0 if all pipes are created. | |
353 | */ | |
354 | static | |
355 | int init_thread_quit_pipe(void) | |
356 | { | |
a02de639 | 357 | int ret; |
b8aa1682 | 358 | |
a02de639 | 359 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 360 | |
b8aa1682 JD |
361 | return ret; |
362 | } | |
363 | ||
364 | /* | |
365 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
366 | */ | |
367 | static | |
368 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
369 | { | |
370 | int ret; | |
371 | ||
372 | if (events == NULL || size == 0) { | |
373 | ret = -1; | |
374 | goto error; | |
375 | } | |
376 | ||
377 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
378 | if (ret < 0) { | |
379 | goto error; | |
380 | } | |
381 | ||
382 | /* Add quit pipe */ | |
383 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
384 | if (ret < 0) { | |
385 | goto error; | |
386 | } | |
387 | ||
388 | return 0; | |
389 | ||
390 | error: | |
391 | return ret; | |
392 | } | |
393 | ||
394 | /* | |
395 | * Check if the thread quit pipe was triggered. | |
396 | * | |
397 | * Return 1 if it was triggered else 0; | |
398 | */ | |
399 | static | |
400 | int check_thread_quit_pipe(int fd, uint32_t events) | |
401 | { | |
402 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
403 | return 1; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | /* | |
410 | * Create and init socket from uri. | |
411 | */ | |
412 | static | |
413 | struct lttcomm_sock *relay_init_sock(struct lttng_uri *uri) | |
414 | { | |
415 | int ret; | |
416 | struct lttcomm_sock *sock = NULL; | |
417 | ||
418 | sock = lttcomm_alloc_sock_from_uri(uri); | |
419 | if (sock == NULL) { | |
420 | ERR("Allocating socket"); | |
421 | goto error; | |
422 | } | |
423 | ||
424 | ret = lttcomm_create_sock(sock); | |
425 | if (ret < 0) { | |
426 | goto error; | |
427 | } | |
428 | DBG("Listening on sock %d", sock->fd); | |
429 | ||
430 | ret = sock->ops->bind(sock); | |
431 | if (ret < 0) { | |
432 | goto error; | |
433 | } | |
434 | ||
435 | ret = sock->ops->listen(sock, -1); | |
436 | if (ret < 0) { | |
437 | goto error; | |
438 | ||
439 | } | |
440 | ||
441 | return sock; | |
442 | ||
443 | error: | |
444 | if (sock) { | |
445 | lttcomm_destroy_sock(sock); | |
446 | } | |
447 | return NULL; | |
448 | } | |
449 | ||
173af62f DG |
450 | /* |
451 | * Return nonzero if stream needs to be closed. | |
452 | */ | |
453 | static | |
454 | int close_stream_check(struct relay_stream *stream) | |
455 | { | |
456 | ||
457 | if (stream->close_flag && stream->prev_seq == stream->last_net_seq_num) { | |
458 | return 1; | |
459 | } | |
460 | return 0; | |
461 | } | |
462 | ||
b8aa1682 JD |
463 | /* |
464 | * This thread manages the listening for new connections on the network | |
465 | */ | |
466 | static | |
467 | void *relay_thread_listener(void *data) | |
468 | { | |
095a4ae5 | 469 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
470 | int val = 1; |
471 | uint32_t revents, nb_fd; | |
472 | struct lttng_poll_event events; | |
473 | struct lttcomm_sock *control_sock, *data_sock; | |
474 | ||
b8aa1682 JD |
475 | DBG("[thread] Relay listener started"); |
476 | ||
477 | control_sock = relay_init_sock(control_uri); | |
478 | if (!control_sock) { | |
095a4ae5 | 479 | goto error_sock_control; |
b8aa1682 JD |
480 | } |
481 | ||
482 | data_sock = relay_init_sock(data_uri); | |
483 | if (!data_sock) { | |
095a4ae5 | 484 | goto error_sock_relay; |
b8aa1682 JD |
485 | } |
486 | ||
487 | /* | |
488 | * Pass 3 as size here for the thread quit pipe, control and data socket. | |
489 | */ | |
490 | ret = create_thread_poll_set(&events, 3); | |
491 | if (ret < 0) { | |
492 | goto error_create_poll; | |
493 | } | |
494 | ||
495 | /* Add the control socket */ | |
496 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
497 | if (ret < 0) { | |
498 | goto error_poll_add; | |
499 | } | |
500 | ||
501 | /* Add the data socket */ | |
502 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
503 | if (ret < 0) { | |
504 | goto error_poll_add; | |
505 | } | |
506 | ||
507 | while (1) { | |
508 | DBG("Listener accepting connections"); | |
509 | ||
510 | nb_fd = LTTNG_POLL_GETNB(&events); | |
511 | ||
512 | restart: | |
513 | ret = lttng_poll_wait(&events, -1); | |
514 | if (ret < 0) { | |
515 | /* | |
516 | * Restart interrupted system call. | |
517 | */ | |
518 | if (errno == EINTR) { | |
519 | goto restart; | |
520 | } | |
521 | goto error; | |
522 | } | |
523 | ||
524 | DBG("Relay new connection received"); | |
525 | for (i = 0; i < nb_fd; i++) { | |
526 | /* Fetch once the poll data */ | |
527 | revents = LTTNG_POLL_GETEV(&events, i); | |
528 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
529 | ||
530 | /* Thread quit pipe has been closed. Killing thread. */ | |
531 | ret = check_thread_quit_pipe(pollfd, revents); | |
532 | if (ret) { | |
095a4ae5 MD |
533 | err = 0; |
534 | goto exit; | |
b8aa1682 JD |
535 | } |
536 | ||
537 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
538 | ERR("socket poll error"); | |
539 | goto error; | |
540 | } else if (revents & LPOLLIN) { | |
4b7f17b2 MD |
541 | /* |
542 | * Get allocated in this thread, | |
543 | * enqueued to a global queue, dequeued | |
544 | * and freed in the worker thread. | |
545 | */ | |
546 | struct relay_command *relay_cmd; | |
547 | struct lttcomm_sock *newsock; | |
b8aa1682 JD |
548 | |
549 | relay_cmd = zmalloc(sizeof(struct relay_command)); | |
550 | if (relay_cmd == NULL) { | |
551 | PERROR("relay command zmalloc"); | |
552 | goto error; | |
553 | } | |
554 | ||
555 | if (pollfd == data_sock->fd) { | |
556 | newsock = data_sock->ops->accept(data_sock); | |
4b7f17b2 | 557 | if (!newsock) { |
b8aa1682 | 558 | PERROR("accepting data sock"); |
4b7f17b2 | 559 | free(relay_cmd); |
b8aa1682 JD |
560 | goto error; |
561 | } | |
562 | relay_cmd->type = RELAY_DATA; | |
563 | DBG("Relay data connection accepted, socket %d", newsock->fd); | |
4b7f17b2 MD |
564 | } else { |
565 | assert(pollfd == control_sock->fd); | |
b8aa1682 | 566 | newsock = control_sock->ops->accept(control_sock); |
4b7f17b2 | 567 | if (!newsock) { |
b8aa1682 | 568 | PERROR("accepting control sock"); |
4b7f17b2 | 569 | free(relay_cmd); |
b8aa1682 JD |
570 | goto error; |
571 | } | |
572 | relay_cmd->type = RELAY_CONTROL; | |
573 | DBG("Relay control connection accepted, socket %d", newsock->fd); | |
574 | } | |
575 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, | |
576 | &val, sizeof(int)); | |
577 | if (ret < 0) { | |
578 | PERROR("setsockopt inet"); | |
4b7f17b2 MD |
579 | lttcomm_destroy_sock(newsock); |
580 | free(relay_cmd); | |
b8aa1682 JD |
581 | goto error; |
582 | } | |
583 | relay_cmd->sock = newsock; | |
584 | /* | |
585 | * Lock free enqueue the request. | |
586 | */ | |
587 | cds_wfq_enqueue(&relay_cmd_queue.queue, &relay_cmd->node); | |
588 | ||
589 | /* | |
590 | * Wake the dispatch queue futex. Implicit memory | |
591 | * barrier with the exchange in cds_wfq_enqueue. | |
592 | */ | |
593 | futex_nto1_wake(&relay_cmd_queue.futex); | |
594 | } | |
595 | } | |
596 | } | |
597 | ||
095a4ae5 | 598 | exit: |
b8aa1682 JD |
599 | error: |
600 | error_poll_add: | |
601 | lttng_poll_clean(&events); | |
602 | error_create_poll: | |
095a4ae5 MD |
603 | if (data_sock->fd >= 0) { |
604 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
605 | if (ret) { |
606 | PERROR("close"); | |
607 | } | |
b8aa1682 | 608 | } |
095a4ae5 MD |
609 | lttcomm_destroy_sock(data_sock); |
610 | error_sock_relay: | |
611 | if (control_sock->fd >= 0) { | |
612 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
613 | if (ret) { |
614 | PERROR("close"); | |
615 | } | |
b8aa1682 | 616 | } |
095a4ae5 MD |
617 | lttcomm_destroy_sock(control_sock); |
618 | error_sock_control: | |
619 | if (err) { | |
620 | DBG("Thread exited with error"); | |
621 | } | |
b8aa1682 JD |
622 | DBG("Relay listener thread cleanup complete"); |
623 | stop_threads(); | |
b8aa1682 JD |
624 | return NULL; |
625 | } | |
626 | ||
627 | /* | |
628 | * This thread manages the dispatching of the requests to worker threads | |
629 | */ | |
630 | static | |
631 | void *relay_thread_dispatcher(void *data) | |
632 | { | |
633 | int ret; | |
634 | struct cds_wfq_node *node; | |
635 | struct relay_command *relay_cmd = NULL; | |
636 | ||
637 | DBG("[thread] Relay dispatcher started"); | |
638 | ||
26c9d55e | 639 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
b8aa1682 JD |
640 | /* Atomically prepare the queue futex */ |
641 | futex_nto1_prepare(&relay_cmd_queue.futex); | |
642 | ||
643 | do { | |
644 | /* Dequeue commands */ | |
645 | node = cds_wfq_dequeue_blocking(&relay_cmd_queue.queue); | |
646 | if (node == NULL) { | |
647 | DBG("Woken up but nothing in the relay command queue"); | |
648 | /* Continue thread execution */ | |
649 | break; | |
650 | } | |
651 | ||
652 | relay_cmd = caa_container_of(node, struct relay_command, node); | |
653 | DBG("Dispatching request waiting on sock %d", relay_cmd->sock->fd); | |
654 | ||
655 | /* | |
656 | * Inform worker thread of the new request. This | |
657 | * call is blocking so we can be assured that the data will be read | |
658 | * at some point in time or wait to the end of the world :) | |
659 | */ | |
6f94560a MD |
660 | do { |
661 | ret = write(relay_cmd_pipe[1], relay_cmd, | |
662 | sizeof(struct relay_command)); | |
663 | } while (ret < 0 && errno == EINTR); | |
b8aa1682 JD |
664 | free(relay_cmd); |
665 | if (ret < 0) { | |
666 | PERROR("write cmd pipe"); | |
667 | goto error; | |
668 | } | |
669 | } while (node != NULL); | |
670 | ||
671 | /* Futex wait on queue. Blocking call on futex() */ | |
672 | futex_nto1_wait(&relay_cmd_queue.futex); | |
673 | } | |
674 | ||
675 | error: | |
676 | DBG("Dispatch thread dying"); | |
677 | stop_threads(); | |
678 | return NULL; | |
679 | } | |
680 | ||
681 | /* | |
682 | * Return the realpath(3) of the path even if the last directory token does not | |
683 | * exist. For example, with /tmp/test1/test2, if test2/ does not exist but the | |
684 | * /tmp/test1 does, the real path is returned. In normal time, realpath(3) | |
685 | * fails if the end point directory does not exist. | |
686 | */ | |
687 | static | |
688 | char *expand_full_path(const char *path) | |
689 | { | |
690 | const char *end_path = path; | |
095a4ae5 | 691 | char *next, *cut_path, *expanded_path, *respath; |
b8aa1682 JD |
692 | |
693 | /* Find last token delimited by '/' */ | |
694 | while ((next = strpbrk(end_path + 1, "/"))) { | |
695 | end_path = next; | |
696 | } | |
697 | ||
698 | /* Cut last token from original path */ | |
699 | cut_path = strndup(path, end_path - path); | |
700 | ||
701 | expanded_path = malloc(PATH_MAX); | |
702 | if (expanded_path == NULL) { | |
095a4ae5 MD |
703 | respath = NULL; |
704 | goto end; | |
b8aa1682 JD |
705 | } |
706 | ||
095a4ae5 MD |
707 | respath = realpath(cut_path, expanded_path); |
708 | if (respath == NULL) { | |
b8aa1682 JD |
709 | switch (errno) { |
710 | case ENOENT: | |
711 | ERR("%s: No such file or directory", cut_path); | |
712 | break; | |
713 | default: | |
714 | PERROR("realpath"); | |
715 | break; | |
716 | } | |
095a4ae5 MD |
717 | free(expanded_path); |
718 | } else { | |
719 | /* Add end part to expanded path */ | |
720 | strcat(respath, end_path); | |
b8aa1682 | 721 | } |
095a4ae5 | 722 | end: |
b8aa1682 | 723 | free(cut_path); |
095a4ae5 | 724 | return respath; |
b8aa1682 JD |
725 | } |
726 | ||
727 | ||
728 | /* | |
729 | * config_get_default_path | |
730 | * | |
731 | * Returns the HOME directory path. Caller MUST NOT free(3) the return pointer. | |
732 | */ | |
733 | static | |
734 | char *config_get_default_path(void) | |
735 | { | |
736 | return getenv("HOME"); | |
737 | } | |
738 | ||
739 | /* | |
740 | * Create recursively directory using the FULL path. | |
741 | */ | |
742 | static | |
743 | int mkdir_recursive(char *path, mode_t mode) | |
744 | { | |
745 | char *p, tmp[PATH_MAX]; | |
746 | struct stat statbuf; | |
747 | size_t len; | |
748 | int ret; | |
749 | ||
750 | ret = snprintf(tmp, sizeof(tmp), "%s", path); | |
751 | if (ret < 0) { | |
752 | PERROR("snprintf mkdir"); | |
753 | goto error; | |
754 | } | |
755 | ||
756 | len = ret; | |
757 | if (tmp[len - 1] == '/') { | |
758 | tmp[len - 1] = 0; | |
759 | } | |
760 | ||
761 | for (p = tmp + 1; *p; p++) { | |
762 | if (*p == '/') { | |
763 | *p = 0; | |
764 | if (tmp[strlen(tmp) - 1] == '.' && | |
765 | tmp[strlen(tmp) - 2] == '.' && | |
766 | tmp[strlen(tmp) - 3] == '/') { | |
767 | ERR("Using '/../' is not permitted in the trace path (%s)", | |
768 | tmp); | |
769 | ret = -1; | |
770 | goto error; | |
771 | } | |
772 | ret = stat(tmp, &statbuf); | |
773 | if (ret < 0) { | |
774 | ret = mkdir(tmp, mode); | |
775 | if (ret < 0) { | |
095a4ae5 | 776 | if (errno != EEXIST) { |
b8aa1682 JD |
777 | PERROR("mkdir recursive"); |
778 | ret = -errno; | |
779 | goto error; | |
780 | } | |
781 | } | |
782 | } | |
783 | *p = '/'; | |
784 | } | |
785 | } | |
786 | ||
787 | ret = mkdir(tmp, mode); | |
788 | if (ret < 0) { | |
095a4ae5 | 789 | if (errno != EEXIST) { |
b8aa1682 JD |
790 | PERROR("mkdir recursive last piece"); |
791 | ret = -errno; | |
792 | } else { | |
793 | ret = 0; | |
794 | } | |
795 | } | |
796 | ||
797 | error: | |
798 | return ret; | |
799 | } | |
800 | ||
b8aa1682 | 801 | static |
095a4ae5 | 802 | char *create_output_path_auto(char *path_name) |
b8aa1682 | 803 | { |
095a4ae5 | 804 | int ret; |
b8aa1682 | 805 | char *traces_path = NULL; |
095a4ae5 MD |
806 | char *alloc_path = NULL; |
807 | char *default_path; | |
b8aa1682 | 808 | |
095a4ae5 MD |
809 | default_path = config_get_default_path(); |
810 | if (default_path == NULL) { | |
811 | ERR("Home path not found.\n \ | |
812 | Please specify an output path using -o, --output PATH"); | |
813 | goto exit; | |
814 | } | |
815 | alloc_path = strdup(default_path); | |
816 | if (alloc_path == NULL) { | |
817 | PERROR("Path allocation"); | |
818 | goto exit; | |
819 | } | |
820 | ret = asprintf(&traces_path, "%s/" DEFAULT_TRACE_DIR_NAME | |
821 | "/%s", alloc_path, path_name); | |
822 | if (ret < 0) { | |
823 | PERROR("asprintf trace dir name"); | |
824 | goto exit; | |
b8aa1682 | 825 | } |
095a4ae5 | 826 | exit: |
b8aa1682 | 827 | free(alloc_path); |
095a4ae5 MD |
828 | return traces_path; |
829 | } | |
830 | ||
831 | static | |
832 | char *create_output_path_noauto(char *path_name) | |
833 | { | |
834 | int ret; | |
835 | char *traces_path = NULL; | |
836 | char *full_path; | |
b8aa1682 | 837 | |
095a4ae5 MD |
838 | full_path = expand_full_path(opt_output_path); |
839 | ret = asprintf(&traces_path, "%s/%s", full_path, path_name); | |
840 | if (ret < 0) { | |
841 | PERROR("asprintf trace dir name"); | |
842 | goto exit; | |
843 | } | |
b8aa1682 | 844 | exit: |
095a4ae5 | 845 | free(full_path); |
b8aa1682 JD |
846 | return traces_path; |
847 | } | |
848 | ||
095a4ae5 MD |
849 | /* |
850 | * create_output_path: create the output trace directory | |
851 | */ | |
852 | static | |
853 | char *create_output_path(char *path_name) | |
854 | { | |
855 | if (opt_output_path == NULL) { | |
856 | return create_output_path_auto(path_name); | |
857 | } else { | |
858 | return create_output_path_noauto(path_name); | |
859 | } | |
860 | } | |
861 | ||
9d1bbf21 MD |
862 | static |
863 | void deferred_free_stream(struct rcu_head *head) | |
864 | { | |
865 | struct relay_stream *stream = | |
866 | caa_container_of(head, struct relay_stream, rcu_node); | |
867 | free(stream); | |
868 | } | |
869 | ||
b8aa1682 JD |
870 | /* |
871 | * relay_delete_session: Free all memory associated with a session and | |
872 | * close all the FDs | |
873 | */ | |
874 | static | |
875 | void relay_delete_session(struct relay_command *cmd, struct lttng_ht *streams_ht) | |
876 | { | |
877 | struct lttng_ht_iter iter; | |
878 | struct lttng_ht_node_ulong *node; | |
879 | struct relay_stream *stream; | |
880 | int ret; | |
881 | ||
095a4ae5 | 882 | if (!cmd->session) { |
b8aa1682 | 883 | return; |
095a4ae5 | 884 | } |
b8aa1682 | 885 | |
77c7c900 | 886 | DBG("Relay deleting session %" PRIu64, cmd->session->id); |
5b6d8097 DG |
887 | |
888 | lttcomm_destroy_sock(cmd->session->sock); | |
b8aa1682 | 889 | |
9d1bbf21 | 890 | rcu_read_lock(); |
b8aa1682 JD |
891 | cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, node, node) { |
892 | node = lttng_ht_iter_get_node_ulong(&iter); | |
893 | if (node) { | |
894 | stream = caa_container_of(node, | |
895 | struct relay_stream, stream_n); | |
896 | if (stream->session == cmd->session) { | |
f66c074c DG |
897 | ret = close(stream->fd); |
898 | if (ret < 0) { | |
899 | PERROR("close stream fd on delete session"); | |
900 | } | |
b8aa1682 JD |
901 | ret = lttng_ht_del(streams_ht, &iter); |
902 | assert(!ret); | |
9d1bbf21 MD |
903 | call_rcu(&stream->rcu_node, |
904 | deferred_free_stream); | |
b8aa1682 JD |
905 | } |
906 | } | |
907 | } | |
9d1bbf21 | 908 | rcu_read_unlock(); |
5b6d8097 DG |
909 | |
910 | free(cmd->session); | |
b8aa1682 JD |
911 | } |
912 | ||
913 | /* | |
914 | * relay_add_stream: allocate a new stream for a session | |
915 | */ | |
916 | static | |
917 | int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
918 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
919 | { | |
920 | struct relay_session *session = cmd->session; | |
921 | struct lttcomm_relayd_add_stream stream_info; | |
922 | struct relay_stream *stream = NULL; | |
923 | struct lttcomm_relayd_status_stream reply; | |
924 | char *path = NULL, *root_path = NULL; | |
925 | int ret, send_ret; | |
926 | ||
927 | if (!session || session->version_check_done == 0) { | |
928 | ERR("Trying to add a stream before version check"); | |
929 | ret = -1; | |
930 | goto end_no_session; | |
931 | } | |
932 | ||
933 | /* FIXME : use data_size for something ? */ | |
934 | ret = cmd->sock->ops->recvmsg(cmd->sock, &stream_info, | |
7c5aef62 | 935 | sizeof(struct lttcomm_relayd_add_stream), 0); |
b8aa1682 JD |
936 | if (ret < sizeof(struct lttcomm_relayd_add_stream)) { |
937 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
938 | ret = -1; | |
939 | goto end_no_session; | |
940 | } | |
941 | stream = zmalloc(sizeof(struct relay_stream)); | |
942 | if (stream == NULL) { | |
943 | PERROR("relay stream zmalloc"); | |
944 | ret = -1; | |
945 | goto end_no_session; | |
946 | } | |
947 | ||
9d1bbf21 | 948 | rcu_read_lock(); |
b8aa1682 | 949 | stream->stream_handle = ++last_relay_stream_id; |
173af62f | 950 | stream->prev_seq = -1ULL; |
b8aa1682 JD |
951 | stream->session = session; |
952 | ||
953 | root_path = create_output_path(stream_info.pathname); | |
954 | if (!root_path) { | |
955 | ret = -1; | |
956 | goto end; | |
957 | } | |
958 | ret = mkdir_recursive(root_path, S_IRWXU | S_IRWXG); | |
959 | if (ret < 0) { | |
b8aa1682 JD |
960 | ERR("relay creating output directory"); |
961 | goto end; | |
962 | } | |
963 | ||
964 | ret = asprintf(&path, "%s/%s", root_path, stream_info.channel_name); | |
965 | if (ret < 0) { | |
966 | PERROR("asprintf stream path"); | |
967 | goto end; | |
968 | } | |
969 | ||
970 | ret = open(path, O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU|S_IRWXG|S_IRWXO); | |
971 | if (ret < 0) { | |
972 | PERROR("Relay creating trace file"); | |
973 | goto end; | |
974 | } | |
975 | ||
976 | stream->fd = ret; | |
977 | DBG("Tracefile %s created", path); | |
978 | ||
979 | lttng_ht_node_init_ulong(&stream->stream_n, | |
980 | (unsigned long) stream->stream_handle); | |
981 | lttng_ht_add_unique_ulong(streams_ht, | |
982 | &stream->stream_n); | |
983 | ||
984 | DBG("Relay new stream added %s", stream_info.channel_name); | |
985 | ||
986 | end: | |
987 | free(path); | |
988 | free(root_path); | |
989 | /* send the session id to the client or a negative return code on error */ | |
990 | if (ret < 0) { | |
f73fabfd | 991 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 992 | } else { |
f73fabfd | 993 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 JD |
994 | } |
995 | reply.handle = htobe64(stream->stream_handle); | |
996 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
997 | sizeof(struct lttcomm_relayd_status_stream), 0); | |
998 | if (send_ret < 0) { | |
999 | ERR("Relay sending stream id"); | |
1000 | } | |
9d1bbf21 | 1001 | rcu_read_unlock(); |
b8aa1682 JD |
1002 | |
1003 | end_no_session: | |
1004 | return ret; | |
1005 | } | |
1006 | ||
173af62f DG |
1007 | /* |
1008 | * relay_close_stream: close a specific stream | |
1009 | */ | |
1010 | static | |
1011 | int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
1012 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
1013 | { | |
1014 | struct relay_session *session = cmd->session; | |
1015 | struct lttcomm_relayd_close_stream stream_info; | |
1016 | struct lttcomm_relayd_generic_reply reply; | |
1017 | struct relay_stream *stream; | |
1018 | int ret, send_ret; | |
1019 | struct lttng_ht_node_ulong *node; | |
1020 | struct lttng_ht_iter iter; | |
1021 | ||
1022 | DBG("Close stream received"); | |
1023 | ||
1024 | if (!session || session->version_check_done == 0) { | |
1025 | ERR("Trying to close a stream before version check"); | |
1026 | ret = -1; | |
1027 | goto end_no_session; | |
1028 | } | |
1029 | ||
1030 | ret = cmd->sock->ops->recvmsg(cmd->sock, &stream_info, | |
7c5aef62 | 1031 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f DG |
1032 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
1033 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
1034 | ret = -1; | |
1035 | goto end_no_session; | |
1036 | } | |
1037 | ||
1038 | rcu_read_lock(); | |
1039 | lttng_ht_lookup(streams_ht, | |
1040 | (void *)((unsigned long) be64toh(stream_info.stream_id)), | |
1041 | &iter); | |
1042 | node = lttng_ht_iter_get_node_ulong(&iter); | |
1043 | if (node == NULL) { | |
77c7c900 | 1044 | DBG("Relay stream %" PRIu64 " not found", be64toh(stream_info.stream_id)); |
173af62f DG |
1045 | ret = -1; |
1046 | goto end_unlock; | |
1047 | } | |
1048 | ||
1049 | stream = caa_container_of(node, struct relay_stream, stream_n); | |
1050 | if (!stream) { | |
1051 | ret = -1; | |
1052 | goto end_unlock; | |
1053 | } | |
1054 | ||
8e2583a4 | 1055 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
173af62f DG |
1056 | stream->close_flag = 1; |
1057 | ||
1058 | if (close_stream_check(stream)) { | |
1059 | int delret; | |
1060 | ||
f66c074c DG |
1061 | delret = close(stream->fd); |
1062 | if (delret < 0) { | |
1063 | PERROR("close stream"); | |
1064 | } | |
173af62f DG |
1065 | delret = lttng_ht_del(streams_ht, &iter); |
1066 | assert(!delret); | |
1067 | call_rcu(&stream->rcu_node, | |
1068 | deferred_free_stream); | |
1069 | DBG("Closed tracefile %d from close stream", stream->fd); | |
1070 | } | |
1071 | ||
1072 | end_unlock: | |
1073 | rcu_read_unlock(); | |
1074 | ||
1075 | if (ret < 0) { | |
f73fabfd | 1076 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1077 | } else { |
f73fabfd | 1078 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f DG |
1079 | } |
1080 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1081 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1082 | if (send_ret < 0) { | |
1083 | ERR("Relay sending stream id"); | |
1084 | } | |
1085 | ||
1086 | end_no_session: | |
1087 | return ret; | |
1088 | } | |
1089 | ||
b8aa1682 JD |
1090 | /* |
1091 | * relay_unknown_command: send -1 if received unknown command | |
1092 | */ | |
1093 | static | |
1094 | void relay_unknown_command(struct relay_command *cmd) | |
1095 | { | |
1096 | struct lttcomm_relayd_generic_reply reply; | |
1097 | int ret; | |
1098 | ||
f73fabfd | 1099 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1100 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, |
1101 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1102 | if (ret < 0) { | |
1103 | ERR("Relay sending unknown command"); | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * relay_start: send an acknowledgment to the client to tell if we are | |
1109 | * ready to receive data. We are ready if a session is established. | |
1110 | */ | |
1111 | static | |
1112 | int relay_start(struct lttcomm_relayd_hdr *recv_hdr, | |
1113 | struct relay_command *cmd) | |
1114 | { | |
f73fabfd | 1115 | int ret = htobe32(LTTNG_OK); |
b8aa1682 JD |
1116 | struct lttcomm_relayd_generic_reply reply; |
1117 | struct relay_session *session = cmd->session; | |
1118 | ||
1119 | if (!session) { | |
1120 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1121 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1122 | } |
1123 | ||
1124 | reply.ret_code = ret; | |
1125 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1126 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1127 | if (ret < 0) { | |
1128 | ERR("Relay sending start ack"); | |
1129 | } | |
1130 | ||
1131 | return ret; | |
1132 | } | |
1133 | ||
1134 | /* | |
1135 | * Get stream from stream id. | |
9d1bbf21 | 1136 | * Need to be called with RCU read-side lock held. |
b8aa1682 JD |
1137 | */ |
1138 | static | |
1139 | struct relay_stream *relay_stream_from_stream_id(uint64_t stream_id, | |
1140 | struct lttng_ht *streams_ht) | |
1141 | { | |
1142 | struct lttng_ht_node_ulong *node; | |
1143 | struct lttng_ht_iter iter; | |
1144 | struct relay_stream *ret; | |
1145 | ||
1146 | lttng_ht_lookup(streams_ht, | |
1147 | (void *)((unsigned long) stream_id), | |
1148 | &iter); | |
1149 | node = lttng_ht_iter_get_node_ulong(&iter); | |
1150 | if (node == NULL) { | |
77c7c900 | 1151 | DBG("Relay stream %" PRIu64 " not found", stream_id); |
b8aa1682 JD |
1152 | ret = NULL; |
1153 | goto end; | |
1154 | } | |
1155 | ||
1156 | ret = caa_container_of(node, struct relay_stream, stream_n); | |
1157 | ||
1158 | end: | |
1159 | return ret; | |
1160 | } | |
1161 | ||
1d4dfdef DG |
1162 | /* |
1163 | * Append padding to the file pointed by the file descriptor fd. | |
1164 | */ | |
1165 | static int write_padding_to_file(int fd, uint32_t size) | |
1166 | { | |
1167 | int ret = 0; | |
1168 | char *zeros; | |
1169 | ||
1170 | if (size == 0) { | |
1171 | goto end; | |
1172 | } | |
1173 | ||
1174 | zeros = zmalloc(size); | |
1175 | if (zeros == NULL) { | |
1176 | PERROR("zmalloc zeros for padding"); | |
1177 | ret = -1; | |
1178 | goto end; | |
1179 | } | |
1180 | ||
1181 | do { | |
1182 | ret = write(fd, zeros, size); | |
1183 | } while (ret < 0 && errno == EINTR); | |
1184 | if (ret < 0) { | |
1185 | PERROR("write padding to file"); | |
1186 | } | |
1187 | ||
e986c7a1 DG |
1188 | free(zeros); |
1189 | ||
1d4dfdef DG |
1190 | end: |
1191 | return ret; | |
1192 | } | |
1193 | ||
b8aa1682 JD |
1194 | /* |
1195 | * relay_recv_metadata: receive the metada for the session. | |
1196 | */ | |
1197 | static | |
1198 | int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, | |
1199 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
1200 | { | |
f73fabfd | 1201 | int ret = htobe32(LTTNG_OK); |
b8aa1682 JD |
1202 | struct relay_session *session = cmd->session; |
1203 | struct lttcomm_relayd_metadata_payload *metadata_struct; | |
1204 | struct relay_stream *metadata_stream; | |
1205 | uint64_t data_size, payload_size; | |
1206 | ||
1207 | if (!session) { | |
1208 | ERR("Metadata sent before version check"); | |
1209 | ret = -1; | |
1210 | goto end; | |
1211 | } | |
1212 | ||
f6416125 MD |
1213 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1214 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1215 | ERR("Incorrect data size"); | |
1216 | ret = -1; | |
1217 | goto end; | |
1218 | } | |
1219 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1220 | ||
b8aa1682 | 1221 | if (data_buffer_size < data_size) { |
d7b3776f DG |
1222 | /* In case the realloc fails, we can free the memory */ |
1223 | char *tmp_data_ptr = data_buffer; | |
b8aa1682 JD |
1224 | data_buffer = realloc(data_buffer, data_size); |
1225 | if (!data_buffer) { | |
1226 | ERR("Allocating data buffer"); | |
d7b3776f | 1227 | free(tmp_data_ptr); |
b8aa1682 JD |
1228 | ret = -1; |
1229 | goto end; | |
1230 | } | |
1231 | data_buffer_size = data_size; | |
1232 | } | |
1233 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1234 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
7c5aef62 | 1235 | ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0); |
b8aa1682 JD |
1236 | if (ret < 0 || ret != data_size) { |
1237 | ret = -1; | |
1238 | ERR("Relay didn't receive the whole metadata"); | |
1239 | goto end; | |
1240 | } | |
1241 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 MD |
1242 | |
1243 | rcu_read_lock(); | |
b8aa1682 JD |
1244 | metadata_stream = relay_stream_from_stream_id( |
1245 | be64toh(metadata_struct->stream_id), streams_ht); | |
1246 | if (!metadata_stream) { | |
1247 | ret = -1; | |
9d1bbf21 | 1248 | goto end_unlock; |
b8aa1682 JD |
1249 | } |
1250 | ||
6f94560a MD |
1251 | do { |
1252 | ret = write(metadata_stream->fd, metadata_struct->payload, | |
1253 | payload_size); | |
1254 | } while (ret < 0 && errno == EINTR); | |
87c1611d | 1255 | if (ret < payload_size) { |
b8aa1682 JD |
1256 | ERR("Relay error writing metadata on file"); |
1257 | ret = -1; | |
9d1bbf21 | 1258 | goto end_unlock; |
b8aa1682 | 1259 | } |
1d4dfdef DG |
1260 | |
1261 | ret = write_padding_to_file(metadata_stream->fd, | |
1262 | be32toh(metadata_struct->padding_size)); | |
1263 | if (ret < 0) { | |
1264 | goto end_unlock; | |
1265 | } | |
1266 | ||
b8aa1682 JD |
1267 | DBG2("Relay metadata written"); |
1268 | ||
9d1bbf21 | 1269 | end_unlock: |
6e3c5836 | 1270 | rcu_read_unlock(); |
b8aa1682 JD |
1271 | end: |
1272 | return ret; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * relay_send_version: send relayd version number | |
1277 | */ | |
1278 | static | |
1279 | int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, | |
1280 | struct relay_command *cmd) | |
1281 | { | |
7f51dcba | 1282 | int ret; |
092b6259 | 1283 | struct lttcomm_relayd_version reply, msg; |
438b505e | 1284 | struct relay_session *session; |
b8aa1682 JD |
1285 | |
1286 | if (cmd->session == NULL) { | |
1287 | session = zmalloc(sizeof(struct relay_session)); | |
1288 | if (session == NULL) { | |
1289 | PERROR("relay session zmalloc"); | |
1290 | ret = -1; | |
1291 | goto end; | |
1292 | } | |
1293 | session->id = ++last_relay_session_id; | |
77c7c900 | 1294 | DBG("Created session %" PRIu64, session->id); |
b8aa1682 | 1295 | cmd->session = session; |
438b505e MD |
1296 | } else { |
1297 | session = cmd->session; | |
b8aa1682 JD |
1298 | } |
1299 | session->version_check_done = 1; | |
1300 | ||
092b6259 | 1301 | /* Get version from the other side. */ |
7c5aef62 | 1302 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); |
092b6259 DG |
1303 | if (ret < 0 || ret != sizeof(msg)) { |
1304 | ret = -1; | |
1305 | ERR("Relay failed to receive the version values."); | |
1306 | goto end; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * For now, we just ignore the received version but after 2.1 stable | |
1311 | * release, a check must be done to see if we either adapt to the other | |
1312 | * side version (which MUST be lower than us) or keep the latest data | |
1313 | * structure considering that the other side will adapt. | |
1314 | */ | |
1315 | ||
7f51dcba MD |
1316 | ret = sscanf(VERSION, "%u.%u", &reply.major, &reply.minor); |
1317 | if (ret < 2) { | |
1318 | ERR("Error in scanning version"); | |
1319 | ret = -1; | |
1320 | goto end; | |
1321 | } | |
b8aa1682 JD |
1322 | reply.major = htobe32(reply.major); |
1323 | reply.minor = htobe32(reply.minor); | |
1324 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1325 | sizeof(struct lttcomm_relayd_version), 0); | |
1326 | if (ret < 0) { | |
1327 | ERR("Relay sending version"); | |
1328 | } | |
0a6b5085 DG |
1329 | DBG("Version check done (%u.%u)", be32toh(reply.major), |
1330 | be32toh(reply.minor)); | |
b8aa1682 JD |
1331 | |
1332 | end: | |
1333 | return ret; | |
1334 | } | |
1335 | ||
c8f59ee5 | 1336 | /* |
6d805429 | 1337 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 DG |
1338 | */ |
1339 | static | |
6d805429 | 1340 | int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
c8f59ee5 DG |
1341 | struct relay_command *cmd, struct lttng_ht *streams_ht) |
1342 | { | |
1343 | struct relay_session *session = cmd->session; | |
6d805429 | 1344 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1345 | struct lttcomm_relayd_generic_reply reply; |
1346 | struct relay_stream *stream; | |
1347 | int ret; | |
1348 | struct lttng_ht_node_ulong *node; | |
1349 | struct lttng_ht_iter iter; | |
1350 | uint64_t last_net_seq_num, stream_id; | |
1351 | ||
6d805429 | 1352 | DBG("Data pending command received"); |
c8f59ee5 DG |
1353 | |
1354 | if (!session || session->version_check_done == 0) { | |
1355 | ERR("Trying to check for data before version check"); | |
1356 | ret = -1; | |
1357 | goto end_no_session; | |
1358 | } | |
1359 | ||
7c5aef62 | 1360 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1361 | if (ret < sizeof(msg)) { |
6d805429 | 1362 | ERR("Relay didn't receive valid data_pending struct size : %d", ret); |
c8f59ee5 DG |
1363 | ret = -1; |
1364 | goto end_no_session; | |
1365 | } | |
1366 | ||
1367 | stream_id = be64toh(msg.stream_id); | |
1368 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1369 | ||
1370 | rcu_read_lock(); | |
1371 | lttng_ht_lookup(streams_ht, (void *)((unsigned long) stream_id), &iter); | |
1372 | node = lttng_ht_iter_get_node_ulong(&iter); | |
1373 | if (node == NULL) { | |
1374 | DBG("Relay stream %" PRIu64 " not found", stream_id); | |
1375 | ret = -1; | |
1376 | goto end_unlock; | |
1377 | } | |
1378 | ||
1379 | stream = caa_container_of(node, struct relay_stream, stream_n); | |
1380 | assert(stream); | |
1381 | ||
6d805429 | 1382 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1383 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1384 | last_net_seq_num); | |
1385 | ||
33832e64 DG |
1386 | /* Avoid wrapping issue */ |
1387 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) <= 0) { | |
6d805429 | 1388 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1389 | ret = 0; |
6d805429 DG |
1390 | } else { |
1391 | /* Data still being streamed thus pending */ | |
1392 | ret = 1; | |
c8f59ee5 DG |
1393 | } |
1394 | ||
1395 | end_unlock: | |
1396 | rcu_read_unlock(); | |
1397 | ||
1398 | reply.ret_code = htobe32(ret); | |
1399 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1400 | if (ret < 0) { | |
6d805429 | 1401 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1402 | } |
1403 | ||
1404 | end_no_session: | |
1405 | return ret; | |
1406 | } | |
1407 | ||
1408 | /* | |
1409 | * Wait for the control socket to reach a quiescent state. | |
1410 | * | |
1411 | * Note that for now, when receiving this command from the session daemon, this | |
1412 | * means that every subsequent commands or data received on the control socket | |
1413 | * has been handled. So, this is why we simply return OK here. | |
1414 | */ | |
1415 | static | |
1416 | int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, | |
1417 | struct relay_command *cmd) | |
1418 | { | |
1419 | int ret; | |
1420 | struct lttcomm_relayd_generic_reply reply; | |
1421 | ||
1422 | DBG("Checking quiescent state on control socket"); | |
1423 | ||
1424 | reply.ret_code = htobe32(LTTNG_OK); | |
1425 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1426 | if (ret < 0) { | |
6d805429 | 1427 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1428 | } |
1429 | ||
1430 | return ret; | |
1431 | } | |
1432 | ||
b8aa1682 JD |
1433 | /* |
1434 | * relay_process_control: Process the commands received on the control socket | |
1435 | */ | |
1436 | static | |
1437 | int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, | |
1438 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
1439 | { | |
1440 | int ret = 0; | |
1441 | ||
1442 | switch (be32toh(recv_hdr->cmd)) { | |
1443 | /* | |
1444 | case RELAYD_CREATE_SESSION: | |
1445 | ret = relay_create_session(recv_hdr, cmd); | |
1446 | break; | |
1447 | */ | |
1448 | case RELAYD_ADD_STREAM: | |
1449 | ret = relay_add_stream(recv_hdr, cmd, streams_ht); | |
1450 | break; | |
1451 | case RELAYD_START_DATA: | |
1452 | ret = relay_start(recv_hdr, cmd); | |
1453 | break; | |
1454 | case RELAYD_SEND_METADATA: | |
1455 | ret = relay_recv_metadata(recv_hdr, cmd, streams_ht); | |
1456 | break; | |
1457 | case RELAYD_VERSION: | |
1458 | ret = relay_send_version(recv_hdr, cmd); | |
1459 | break; | |
173af62f DG |
1460 | case RELAYD_CLOSE_STREAM: |
1461 | ret = relay_close_stream(recv_hdr, cmd, streams_ht); | |
1462 | break; | |
6d805429 DG |
1463 | case RELAYD_DATA_PENDING: |
1464 | ret = relay_data_pending(recv_hdr, cmd, streams_ht); | |
c8f59ee5 DG |
1465 | break; |
1466 | case RELAYD_QUIESCENT_CONTROL: | |
1467 | ret = relay_quiescent_control(recv_hdr, cmd); | |
1468 | break; | |
b8aa1682 JD |
1469 | case RELAYD_UPDATE_SYNC_INFO: |
1470 | default: | |
1471 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
1472 | relay_unknown_command(cmd); | |
1473 | ret = -1; | |
1474 | goto end; | |
1475 | } | |
1476 | ||
1477 | end: | |
1478 | return ret; | |
1479 | } | |
1480 | ||
1481 | /* | |
1482 | * relay_process_data: Process the data received on the data socket | |
1483 | */ | |
1484 | static | |
1485 | int relay_process_data(struct relay_command *cmd, struct lttng_ht *streams_ht) | |
1486 | { | |
1487 | int ret = 0; | |
1488 | struct relay_stream *stream; | |
1489 | struct lttcomm_relayd_data_hdr data_hdr; | |
1490 | uint64_t stream_id; | |
173af62f | 1491 | uint64_t net_seq_num; |
b8aa1682 JD |
1492 | uint32_t data_size; |
1493 | ||
1494 | ret = cmd->sock->ops->recvmsg(cmd->sock, &data_hdr, | |
7c5aef62 | 1495 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 JD |
1496 | if (ret <= 0) { |
1497 | ERR("Connections seems to be closed"); | |
1498 | ret = -1; | |
1499 | goto end; | |
1500 | } | |
1501 | ||
1502 | stream_id = be64toh(data_hdr.stream_id); | |
9d1bbf21 MD |
1503 | |
1504 | rcu_read_lock(); | |
b8aa1682 JD |
1505 | stream = relay_stream_from_stream_id(stream_id, streams_ht); |
1506 | if (!stream) { | |
1507 | ret = -1; | |
9d1bbf21 | 1508 | goto end_unlock; |
b8aa1682 JD |
1509 | } |
1510 | ||
1511 | data_size = be32toh(data_hdr.data_size); | |
1512 | if (data_buffer_size < data_size) { | |
d7b3776f | 1513 | char *tmp_data_ptr = data_buffer; |
b8aa1682 JD |
1514 | data_buffer = realloc(data_buffer, data_size); |
1515 | if (!data_buffer) { | |
1516 | ERR("Allocating data buffer"); | |
d7b3776f | 1517 | free(tmp_data_ptr); |
b8aa1682 | 1518 | ret = -1; |
9d1bbf21 | 1519 | goto end_unlock; |
b8aa1682 JD |
1520 | } |
1521 | data_buffer_size = data_size; | |
1522 | } | |
1523 | memset(data_buffer, 0, data_size); | |
1524 | ||
173af62f DG |
1525 | net_seq_num = be64toh(data_hdr.net_seq_num); |
1526 | ||
77c7c900 | 1527 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 1528 | data_size, stream_id, net_seq_num); |
7c5aef62 | 1529 | ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0); |
b8aa1682 JD |
1530 | if (ret <= 0) { |
1531 | ret = -1; | |
9d1bbf21 | 1532 | goto end_unlock; |
b8aa1682 JD |
1533 | } |
1534 | ||
6f94560a MD |
1535 | do { |
1536 | ret = write(stream->fd, data_buffer, data_size); | |
1537 | } while (ret < 0 && errno == EINTR); | |
b8aa1682 JD |
1538 | if (ret < data_size) { |
1539 | ERR("Relay error writing data to file"); | |
1540 | ret = -1; | |
9d1bbf21 | 1541 | goto end_unlock; |
b8aa1682 | 1542 | } |
1d4dfdef | 1543 | |
5ab7344e JD |
1544 | DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64, |
1545 | ret, stream->stream_handle); | |
1546 | ||
1d4dfdef DG |
1547 | ret = write_padding_to_file(stream->fd, be32toh(data_hdr.padding_size)); |
1548 | if (ret < 0) { | |
1549 | goto end_unlock; | |
1550 | } | |
1551 | ||
173af62f DG |
1552 | stream->prev_seq = net_seq_num; |
1553 | ||
1554 | /* Check if we need to close the FD */ | |
1555 | if (close_stream_check(stream)) { | |
f66c074c | 1556 | int cret; |
173af62f DG |
1557 | struct lttng_ht_iter iter; |
1558 | ||
f66c074c DG |
1559 | cret = close(stream->fd); |
1560 | if (cret < 0) { | |
1561 | PERROR("close stream process data"); | |
1562 | } | |
173af62f DG |
1563 | iter.iter.node = &stream->stream_n.node; |
1564 | ret = lttng_ht_del(streams_ht, &iter); | |
1565 | assert(!ret); | |
1566 | call_rcu(&stream->rcu_node, | |
1567 | deferred_free_stream); | |
1568 | DBG("Closed tracefile %d after recv data", stream->fd); | |
1569 | } | |
1570 | ||
9d1bbf21 MD |
1571 | end_unlock: |
1572 | rcu_read_unlock(); | |
b8aa1682 JD |
1573 | end: |
1574 | return ret; | |
1575 | } | |
1576 | ||
1577 | static | |
9d1bbf21 | 1578 | void relay_cleanup_poll_connection(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
1579 | { |
1580 | int ret; | |
1581 | ||
b8aa1682 JD |
1582 | lttng_poll_del(events, pollfd); |
1583 | ||
1584 | ret = close(pollfd); | |
1585 | if (ret < 0) { | |
1586 | ERR("Closing pollfd %d", pollfd); | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | static | |
1591 | int relay_add_connection(int fd, struct lttng_poll_event *events, | |
1592 | struct lttng_ht *relay_connections_ht) | |
1593 | { | |
b8aa1682 | 1594 | struct relay_command *relay_connection; |
9d1bbf21 | 1595 | int ret; |
b8aa1682 JD |
1596 | |
1597 | relay_connection = zmalloc(sizeof(struct relay_command)); | |
1598 | if (relay_connection == NULL) { | |
1599 | PERROR("Relay command zmalloc"); | |
9d1bbf21 | 1600 | goto error; |
b8aa1682 JD |
1601 | } |
1602 | ret = read(fd, relay_connection, sizeof(struct relay_command)); | |
cdf0f8fc | 1603 | if (ret < 0 || ret < sizeof(struct relay_command)) { |
b8aa1682 | 1604 | PERROR("read relay cmd pipe"); |
9d1bbf21 | 1605 | goto error_read; |
b8aa1682 JD |
1606 | } |
1607 | ||
1608 | lttng_ht_node_init_ulong(&relay_connection->sock_n, | |
1609 | (unsigned long) relay_connection->sock->fd); | |
9d1bbf21 | 1610 | rcu_read_lock(); |
b8aa1682 JD |
1611 | lttng_ht_add_unique_ulong(relay_connections_ht, |
1612 | &relay_connection->sock_n); | |
9d1bbf21 MD |
1613 | rcu_read_unlock(); |
1614 | return lttng_poll_add(events, | |
b8aa1682 JD |
1615 | relay_connection->sock->fd, |
1616 | LPOLLIN | LPOLLRDHUP); | |
1617 | ||
9d1bbf21 MD |
1618 | error_read: |
1619 | free(relay_connection); | |
1620 | error: | |
1621 | return -1; | |
1622 | } | |
1623 | ||
1624 | static | |
1625 | void deferred_free_connection(struct rcu_head *head) | |
1626 | { | |
1627 | struct relay_command *relay_connection = | |
1628 | caa_container_of(head, struct relay_command, rcu_node); | |
5b6d8097 DG |
1629 | |
1630 | lttcomm_destroy_sock(relay_connection->sock); | |
9d1bbf21 MD |
1631 | free(relay_connection); |
1632 | } | |
1633 | ||
1634 | static | |
1635 | void relay_del_connection(struct lttng_ht *relay_connections_ht, | |
1636 | struct lttng_ht *streams_ht, struct lttng_ht_iter *iter, | |
1637 | struct relay_command *relay_connection) | |
1638 | { | |
1639 | int ret; | |
1640 | ||
1641 | ret = lttng_ht_del(relay_connections_ht, iter); | |
1642 | assert(!ret); | |
1643 | if (relay_connection->type == RELAY_CONTROL) { | |
1644 | relay_delete_session(relay_connection, streams_ht); | |
1645 | } | |
5b6d8097 | 1646 | |
9d1bbf21 MD |
1647 | call_rcu(&relay_connection->rcu_node, |
1648 | deferred_free_connection); | |
b8aa1682 JD |
1649 | } |
1650 | ||
1651 | /* | |
1652 | * This thread does the actual work | |
1653 | */ | |
1654 | static | |
1655 | void *relay_thread_worker(void *data) | |
1656 | { | |
095a4ae5 | 1657 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
1658 | uint32_t revents, nb_fd; |
1659 | struct relay_command *relay_connection; | |
1660 | struct lttng_poll_event events; | |
1661 | struct lttng_ht *relay_connections_ht; | |
1662 | struct lttng_ht_node_ulong *node; | |
1663 | struct lttng_ht_iter iter; | |
1664 | struct lttng_ht *streams_ht; | |
1665 | struct lttcomm_relayd_hdr recv_hdr; | |
1666 | ||
1667 | DBG("[thread] Relay worker started"); | |
1668 | ||
9d1bbf21 MD |
1669 | rcu_register_thread(); |
1670 | ||
b8aa1682 JD |
1671 | /* table of connections indexed on socket */ |
1672 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
1673 | if (!relay_connections_ht) { |
1674 | goto relay_connections_ht_error; | |
1675 | } | |
b8aa1682 JD |
1676 | |
1677 | /* tables of streams indexed by stream ID */ | |
1678 | streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
1679 | if (!streams_ht) { |
1680 | goto streams_ht_error; | |
1681 | } | |
b8aa1682 JD |
1682 | |
1683 | ret = create_thread_poll_set(&events, 2); | |
1684 | if (ret < 0) { | |
1685 | goto error_poll_create; | |
1686 | } | |
1687 | ||
1688 | ret = lttng_poll_add(&events, relay_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); | |
1689 | if (ret < 0) { | |
1690 | goto error; | |
1691 | } | |
1692 | ||
1693 | while (1) { | |
1694 | /* Zeroed the events structure */ | |
1695 | lttng_poll_reset(&events); | |
1696 | ||
1697 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1698 | ||
1699 | /* Infinite blocking call, waiting for transmission */ | |
1700 | restart: | |
87c1611d | 1701 | DBG3("Relayd worker thread polling..."); |
b8aa1682 JD |
1702 | ret = lttng_poll_wait(&events, -1); |
1703 | if (ret < 0) { | |
1704 | /* | |
1705 | * Restart interrupted system call. | |
1706 | */ | |
1707 | if (errno == EINTR) { | |
1708 | goto restart; | |
1709 | } | |
1710 | goto error; | |
1711 | } | |
1712 | ||
1713 | for (i = 0; i < nb_fd; i++) { | |
1714 | /* Fetch once the poll data */ | |
1715 | revents = LTTNG_POLL_GETEV(&events, i); | |
1716 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1717 | ||
1718 | /* Thread quit pipe has been closed. Killing thread. */ | |
1719 | ret = check_thread_quit_pipe(pollfd, revents); | |
1720 | if (ret) { | |
095a4ae5 MD |
1721 | err = 0; |
1722 | goto exit; | |
b8aa1682 JD |
1723 | } |
1724 | ||
1725 | /* Inspect the relay cmd pipe for new connection */ | |
1726 | if (pollfd == relay_cmd_pipe[0]) { | |
1727 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1728 | ERR("Relay pipe error"); | |
1729 | goto error; | |
1730 | } else if (revents & LPOLLIN) { | |
1731 | DBG("Relay command received"); | |
1732 | ret = relay_add_connection(relay_cmd_pipe[0], | |
1733 | &events, relay_connections_ht); | |
1734 | if (ret < 0) { | |
1735 | goto error; | |
1736 | } | |
1737 | } | |
1738 | } else if (revents > 0) { | |
9d1bbf21 | 1739 | rcu_read_lock(); |
b8aa1682 JD |
1740 | lttng_ht_lookup(relay_connections_ht, |
1741 | (void *)((unsigned long) pollfd), | |
1742 | &iter); | |
1743 | node = lttng_ht_iter_get_node_ulong(&iter); | |
1744 | if (node == NULL) { | |
1745 | DBG2("Relay sock %d not found", pollfd); | |
9d1bbf21 | 1746 | rcu_read_unlock(); |
b8aa1682 JD |
1747 | goto error; |
1748 | } | |
1749 | relay_connection = caa_container_of(node, | |
1750 | struct relay_command, sock_n); | |
1751 | ||
1752 | if (revents & (LPOLLERR)) { | |
1753 | ERR("POLL ERROR"); | |
9d1bbf21 MD |
1754 | relay_cleanup_poll_connection(&events, pollfd); |
1755 | relay_del_connection(relay_connections_ht, | |
1756 | streams_ht, &iter, | |
1757 | relay_connection); | |
b8aa1682 JD |
1758 | } else if (revents & (LPOLLHUP | LPOLLRDHUP)) { |
1759 | DBG("Socket %d hung up", pollfd); | |
9d1bbf21 MD |
1760 | relay_cleanup_poll_connection(&events, pollfd); |
1761 | relay_del_connection(relay_connections_ht, | |
1762 | streams_ht, &iter, | |
1763 | relay_connection); | |
b8aa1682 JD |
1764 | } else if (revents & LPOLLIN) { |
1765 | /* control socket */ | |
1766 | if (relay_connection->type == RELAY_CONTROL) { | |
1767 | ret = relay_connection->sock->ops->recvmsg( | |
1768 | relay_connection->sock, &recv_hdr, | |
7c5aef62 | 1769 | sizeof(struct lttcomm_relayd_hdr), 0); |
b8aa1682 JD |
1770 | /* connection closed */ |
1771 | if (ret <= 0) { | |
9d1bbf21 MD |
1772 | relay_cleanup_poll_connection(&events, pollfd); |
1773 | relay_del_connection(relay_connections_ht, | |
1774 | streams_ht, &iter, | |
1775 | relay_connection); | |
b8aa1682 JD |
1776 | DBG("Control connection closed with %d", pollfd); |
1777 | } else { | |
1778 | if (relay_connection->session) { | |
77c7c900 | 1779 | DBG2("Relay worker receiving data for session : %" PRIu64, |
b8aa1682 JD |
1780 | relay_connection->session->id); |
1781 | } | |
1782 | ret = relay_process_control(&recv_hdr, | |
1783 | relay_connection, | |
1784 | streams_ht); | |
1785 | /* | |
1786 | * there was an error in processing a control | |
1787 | * command: clear the session | |
1788 | * */ | |
1789 | if (ret < 0) { | |
9d1bbf21 MD |
1790 | relay_cleanup_poll_connection(&events, pollfd); |
1791 | relay_del_connection(relay_connections_ht, | |
1792 | streams_ht, &iter, | |
1793 | relay_connection); | |
b8aa1682 JD |
1794 | DBG("Connection closed with %d", pollfd); |
1795 | } | |
1796 | } | |
1797 | /* data socket */ | |
1798 | } else if (relay_connection->type == RELAY_DATA) { | |
1799 | ret = relay_process_data(relay_connection, streams_ht); | |
1800 | /* connection closed */ | |
1801 | if (ret < 0) { | |
9d1bbf21 MD |
1802 | relay_cleanup_poll_connection(&events, pollfd); |
1803 | relay_del_connection(relay_connections_ht, | |
1804 | streams_ht, &iter, | |
1805 | relay_connection); | |
b8aa1682 JD |
1806 | DBG("Data connection closed with %d", pollfd); |
1807 | } | |
1808 | } | |
1809 | } | |
9d1bbf21 | 1810 | rcu_read_unlock(); |
b8aa1682 JD |
1811 | } |
1812 | } | |
1813 | } | |
1814 | ||
095a4ae5 | 1815 | exit: |
b8aa1682 JD |
1816 | error: |
1817 | lttng_poll_clean(&events); | |
1818 | ||
1819 | /* empty the hash table and free the memory */ | |
9d1bbf21 | 1820 | rcu_read_lock(); |
b8aa1682 JD |
1821 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, node, node) { |
1822 | node = lttng_ht_iter_get_node_ulong(&iter); | |
1823 | if (node) { | |
1824 | relay_connection = caa_container_of(node, | |
1825 | struct relay_command, sock_n); | |
9d1bbf21 MD |
1826 | relay_del_connection(relay_connections_ht, |
1827 | streams_ht, &iter, | |
1828 | relay_connection); | |
b8aa1682 | 1829 | } |
b8aa1682 | 1830 | } |
9d1bbf21 | 1831 | rcu_read_unlock(); |
b8aa1682 | 1832 | error_poll_create: |
095a4ae5 MD |
1833 | lttng_ht_destroy(streams_ht); |
1834 | streams_ht_error: | |
b8aa1682 | 1835 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 1836 | relay_connections_ht_error: |
6620da75 DG |
1837 | /* Close relay cmd pipes */ |
1838 | utils_close_pipe(relay_cmd_pipe); | |
095a4ae5 MD |
1839 | if (err) { |
1840 | DBG("Thread exited with error"); | |
1841 | } | |
b8aa1682 | 1842 | DBG("Worker thread cleanup complete"); |
095a4ae5 | 1843 | free(data_buffer); |
b8aa1682 | 1844 | stop_threads(); |
9d1bbf21 | 1845 | rcu_unregister_thread(); |
b8aa1682 JD |
1846 | return NULL; |
1847 | } | |
1848 | ||
1849 | /* | |
1850 | * Create the relay command pipe to wake thread_manage_apps. | |
1851 | * Closed in cleanup(). | |
1852 | */ | |
1853 | static int create_relay_cmd_pipe(void) | |
1854 | { | |
a02de639 | 1855 | int ret; |
b8aa1682 | 1856 | |
a02de639 | 1857 | ret = utils_create_pipe_cloexec(relay_cmd_pipe); |
b8aa1682 | 1858 | |
b8aa1682 JD |
1859 | return ret; |
1860 | } | |
1861 | ||
1862 | /* | |
1863 | * main | |
1864 | */ | |
1865 | int main(int argc, char **argv) | |
1866 | { | |
1867 | int ret = 0; | |
1868 | void *status; | |
1869 | ||
1870 | /* Create thread quit pipe */ | |
1871 | if ((ret = init_thread_quit_pipe()) < 0) { | |
1872 | goto error; | |
1873 | } | |
1874 | ||
1875 | /* Parse arguments */ | |
1876 | progname = argv[0]; | |
1877 | if ((ret = parse_args(argc, argv) < 0)) { | |
a02de639 | 1878 | goto exit; |
b8aa1682 JD |
1879 | } |
1880 | ||
1881 | if ((ret = set_signal_handler()) < 0) { | |
1882 | goto exit; | |
1883 | } | |
1884 | ||
1885 | /* Daemonize */ | |
1886 | if (opt_daemon) { | |
1887 | ret = daemon(0, 0); | |
1888 | if (ret < 0) { | |
1889 | PERROR("daemon"); | |
a02de639 | 1890 | goto exit; |
b8aa1682 JD |
1891 | } |
1892 | } | |
1893 | ||
1894 | /* Check if daemon is UID = 0 */ | |
1895 | is_root = !getuid(); | |
1896 | ||
1897 | if (!is_root) { | |
1898 | if (control_uri->port < 1024 || data_uri->port < 1024) { | |
1899 | ERR("Need to be root to use ports < 1024"); | |
1900 | ret = -1; | |
a02de639 | 1901 | goto exit; |
b8aa1682 JD |
1902 | } |
1903 | } | |
1904 | ||
1905 | /* Setup the thread apps communication pipe. */ | |
1906 | if ((ret = create_relay_cmd_pipe()) < 0) { | |
1907 | goto exit; | |
1908 | } | |
1909 | ||
1910 | /* Init relay command queue. */ | |
1911 | cds_wfq_init(&relay_cmd_queue.queue); | |
1912 | ||
1913 | /* Set up max poll set size */ | |
1914 | lttng_poll_set_max_size(); | |
1915 | ||
1916 | /* Setup the dispatcher thread */ | |
1917 | ret = pthread_create(&dispatcher_thread, NULL, | |
1918 | relay_thread_dispatcher, (void *) NULL); | |
1919 | if (ret != 0) { | |
1920 | PERROR("pthread_create dispatcher"); | |
1921 | goto exit_dispatcher; | |
1922 | } | |
1923 | ||
1924 | /* Setup the worker thread */ | |
1925 | ret = pthread_create(&worker_thread, NULL, | |
1926 | relay_thread_worker, (void *) NULL); | |
1927 | if (ret != 0) { | |
1928 | PERROR("pthread_create worker"); | |
1929 | goto exit_worker; | |
1930 | } | |
1931 | ||
1932 | /* Setup the listener thread */ | |
1933 | ret = pthread_create(&listener_thread, NULL, | |
1934 | relay_thread_listener, (void *) NULL); | |
1935 | if (ret != 0) { | |
1936 | PERROR("pthread_create listener"); | |
1937 | goto exit_listener; | |
1938 | } | |
1939 | ||
1940 | exit_listener: | |
1941 | ret = pthread_join(listener_thread, &status); | |
1942 | if (ret != 0) { | |
1943 | PERROR("pthread_join"); | |
1944 | goto error; /* join error, exit without cleanup */ | |
1945 | } | |
1946 | ||
1947 | exit_worker: | |
1948 | ret = pthread_join(worker_thread, &status); | |
1949 | if (ret != 0) { | |
1950 | PERROR("pthread_join"); | |
1951 | goto error; /* join error, exit without cleanup */ | |
1952 | } | |
1953 | ||
1954 | exit_dispatcher: | |
1955 | ret = pthread_join(dispatcher_thread, &status); | |
1956 | if (ret != 0) { | |
1957 | PERROR("pthread_join"); | |
1958 | goto error; /* join error, exit without cleanup */ | |
1959 | } | |
1960 | ||
1961 | exit: | |
1962 | cleanup(); | |
1963 | if (!ret) { | |
1964 | exit(EXIT_SUCCESS); | |
1965 | } | |
a02de639 | 1966 | |
b8aa1682 JD |
1967 | error: |
1968 | exit(EXIT_FAILURE); | |
1969 | } |