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" |
1c20f0e2 | 55 | #include "index.h" |
0f907de1 | 56 | #include "utils.h" |
b8aa1682 JD |
57 | #include "lttng-relayd.h" |
58 | ||
59 | /* command line options */ | |
0f907de1 | 60 | char *opt_output_path; |
b8aa1682 | 61 | static int opt_daemon; |
095a4ae5 MD |
62 | static struct lttng_uri *control_uri; |
63 | static struct lttng_uri *data_uri; | |
b8aa1682 JD |
64 | |
65 | const char *progname; | |
b8aa1682 JD |
66 | |
67 | /* | |
68 | * Quit pipe for all threads. This permits a single cancellation point | |
69 | * for all threads when receiving an event on the pipe. | |
70 | */ | |
71 | static int thread_quit_pipe[2] = { -1, -1 }; | |
72 | ||
73 | /* | |
74 | * This pipe is used to inform the worker thread that a command is queued and | |
75 | * ready to be processed. | |
76 | */ | |
77 | static int relay_cmd_pipe[2] = { -1, -1 }; | |
78 | ||
26c9d55e | 79 | /* Shared between threads */ |
b8aa1682 JD |
80 | static int dispatch_thread_exit; |
81 | ||
82 | static pthread_t listener_thread; | |
83 | static pthread_t dispatcher_thread; | |
84 | static pthread_t worker_thread; | |
85 | ||
095a4ae5 MD |
86 | static uint64_t last_relay_stream_id; |
87 | static uint64_t last_relay_session_id; | |
b8aa1682 JD |
88 | |
89 | /* | |
90 | * Relay command queue. | |
91 | * | |
92 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
93 | * queue. | |
94 | */ | |
95 | static struct relay_cmd_queue relay_cmd_queue; | |
96 | ||
97 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
98 | static char *data_buffer; |
99 | static unsigned int data_buffer_size; | |
b8aa1682 | 100 | |
1c20f0e2 JD |
101 | /* Global hash table that stores relay index object. */ |
102 | static struct lttng_ht *indexes_ht; | |
103 | ||
104 | /* We need those values for the file/dir creation. */ | |
105 | static uid_t relayd_uid; | |
106 | static gid_t relayd_gid; | |
107 | ||
b8aa1682 JD |
108 | /* |
109 | * usage function on stderr | |
110 | */ | |
111 | static | |
112 | void usage(void) | |
113 | { | |
114 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); | |
994fa64f DG |
115 | fprintf(stderr, " -h, --help Display this usage.\n"); |
116 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
117 | fprintf(stderr, " -C, --control-port URL Control port listening.\n"); | |
118 | fprintf(stderr, " -D, --data-port URL Data port listening.\n"); | |
119 | fprintf(stderr, " -o, --output PATH Output path for traces. Must use an absolute path.\n"); | |
120 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
b8aa1682 JD |
121 | } |
122 | ||
123 | static | |
124 | int parse_args(int argc, char **argv) | |
125 | { | |
126 | int c; | |
127 | int ret = 0; | |
128 | char *default_address; | |
129 | ||
130 | static struct option long_options[] = { | |
e3678fd8 MD |
131 | { "control-port", 1, 0, 'C', }, |
132 | { "data-port", 1, 0, 'D', }, | |
133 | { "daemonize", 0, 0, 'd', }, | |
134 | { "help", 0, 0, 'h', }, | |
135 | { "output", 1, 0, 'o', }, | |
136 | { "verbose", 0, 0, 'v', }, | |
095a4ae5 | 137 | { NULL, 0, 0, 0, }, |
b8aa1682 JD |
138 | }; |
139 | ||
140 | while (1) { | |
141 | int option_index = 0; | |
142 | c = getopt_long(argc, argv, "dhv" "C:D:o:", | |
143 | long_options, &option_index); | |
144 | if (c == -1) { | |
145 | break; | |
146 | } | |
147 | ||
148 | switch (c) { | |
149 | case 0: | |
150 | fprintf(stderr, "option %s", long_options[option_index].name); | |
151 | if (optarg) { | |
152 | fprintf(stderr, " with arg %s\n", optarg); | |
153 | } | |
154 | break; | |
155 | case 'C': | |
156 | ret = uri_parse(optarg, &control_uri); | |
157 | if (ret < 0) { | |
158 | ERR("Invalid control URI specified"); | |
159 | goto exit; | |
160 | } | |
161 | if (control_uri->port == 0) { | |
162 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
163 | } | |
164 | break; | |
165 | case 'D': | |
166 | ret = uri_parse(optarg, &data_uri); | |
167 | if (ret < 0) { | |
168 | ERR("Invalid data URI specified"); | |
169 | goto exit; | |
170 | } | |
171 | if (data_uri->port == 0) { | |
172 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
173 | } | |
174 | break; | |
175 | case 'd': | |
176 | opt_daemon = 1; | |
177 | break; | |
178 | case 'h': | |
179 | usage(); | |
180 | exit(EXIT_FAILURE); | |
181 | case 'o': | |
182 | ret = asprintf(&opt_output_path, "%s", optarg); | |
183 | if (ret < 0) { | |
184 | PERROR("asprintf opt_output_path"); | |
185 | goto exit; | |
186 | } | |
187 | break; | |
188 | case 'v': | |
189 | /* Verbose level can increase using multiple -v */ | |
190 | lttng_opt_verbose += 1; | |
191 | break; | |
192 | default: | |
193 | /* Unknown option or other error. | |
194 | * Error is printed by getopt, just return */ | |
195 | ret = -1; | |
196 | goto exit; | |
197 | } | |
198 | } | |
199 | ||
200 | /* assign default values */ | |
201 | if (control_uri == NULL) { | |
202 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
203 | DEFAULT_NETWORK_CONTROL_PORT); | |
204 | if (ret < 0) { | |
205 | PERROR("asprintf default data address"); | |
206 | goto exit; | |
207 | } | |
208 | ||
209 | ret = uri_parse(default_address, &control_uri); | |
210 | free(default_address); | |
211 | if (ret < 0) { | |
212 | ERR("Invalid control URI specified"); | |
213 | goto exit; | |
214 | } | |
215 | } | |
216 | if (data_uri == NULL) { | |
217 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
218 | DEFAULT_NETWORK_DATA_PORT); | |
219 | if (ret < 0) { | |
220 | PERROR("asprintf default data address"); | |
221 | goto exit; | |
222 | } | |
223 | ||
224 | ret = uri_parse(default_address, &data_uri); | |
225 | free(default_address); | |
226 | if (ret < 0) { | |
227 | ERR("Invalid data URI specified"); | |
228 | goto exit; | |
229 | } | |
230 | } | |
231 | ||
232 | exit: | |
233 | return ret; | |
234 | } | |
235 | ||
236 | /* | |
237 | * Cleanup the daemon | |
238 | */ | |
239 | static | |
240 | void cleanup(void) | |
241 | { | |
b8aa1682 JD |
242 | DBG("Cleaning up"); |
243 | ||
095a4ae5 MD |
244 | /* free the dynamically allocated opt_output_path */ |
245 | free(opt_output_path); | |
246 | ||
a02de639 CB |
247 | /* Close thread quit pipes */ |
248 | utils_close_pipe(thread_quit_pipe); | |
249 | ||
710c1f73 DG |
250 | uri_free(control_uri); |
251 | uri_free(data_uri); | |
b8aa1682 JD |
252 | } |
253 | ||
254 | /* | |
255 | * Write to writable pipe used to notify a thread. | |
256 | */ | |
257 | static | |
258 | int notify_thread_pipe(int wpipe) | |
259 | { | |
260 | int ret; | |
261 | ||
6f94560a MD |
262 | do { |
263 | ret = write(wpipe, "!", 1); | |
264 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 265 | if (ret < 0 || ret != 1) { |
b8aa1682 JD |
266 | PERROR("write poll pipe"); |
267 | } | |
268 | ||
269 | return ret; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Stop all threads by closing the thread quit pipe. | |
274 | */ | |
275 | static | |
276 | void stop_threads(void) | |
277 | { | |
278 | int ret; | |
279 | ||
280 | /* Stopping all threads */ | |
281 | DBG("Terminating all threads"); | |
282 | ret = notify_thread_pipe(thread_quit_pipe[1]); | |
283 | if (ret < 0) { | |
284 | ERR("write error on thread quit pipe"); | |
285 | } | |
286 | ||
287 | /* Dispatch thread */ | |
26c9d55e | 288 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
b8aa1682 JD |
289 | futex_nto1_wake(&relay_cmd_queue.futex); |
290 | } | |
291 | ||
292 | /* | |
293 | * Signal handler for the daemon | |
294 | * | |
295 | * Simply stop all worker threads, leaving main() return gracefully after | |
296 | * joining all threads and calling cleanup(). | |
297 | */ | |
298 | static | |
299 | void sighandler(int sig) | |
300 | { | |
301 | switch (sig) { | |
302 | case SIGPIPE: | |
303 | DBG("SIGPIPE caught"); | |
304 | return; | |
305 | case SIGINT: | |
306 | DBG("SIGINT caught"); | |
307 | stop_threads(); | |
308 | break; | |
309 | case SIGTERM: | |
310 | DBG("SIGTERM caught"); | |
311 | stop_threads(); | |
312 | break; | |
313 | default: | |
314 | break; | |
315 | } | |
316 | } | |
317 | ||
318 | /* | |
319 | * Setup signal handler for : | |
320 | * SIGINT, SIGTERM, SIGPIPE | |
321 | */ | |
322 | static | |
323 | int set_signal_handler(void) | |
324 | { | |
325 | int ret = 0; | |
326 | struct sigaction sa; | |
327 | sigset_t sigset; | |
328 | ||
329 | if ((ret = sigemptyset(&sigset)) < 0) { | |
330 | PERROR("sigemptyset"); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | sa.sa_handler = sighandler; | |
335 | sa.sa_mask = sigset; | |
336 | sa.sa_flags = 0; | |
337 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
338 | PERROR("sigaction"); | |
339 | return ret; | |
340 | } | |
341 | ||
342 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
343 | PERROR("sigaction"); | |
344 | return ret; | |
345 | } | |
346 | ||
347 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
348 | PERROR("sigaction"); | |
349 | return ret; | |
350 | } | |
351 | ||
352 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); | |
353 | ||
354 | return ret; | |
355 | } | |
356 | ||
357 | /* | |
358 | * Init thread quit pipe. | |
359 | * | |
360 | * Return -1 on error or 0 if all pipes are created. | |
361 | */ | |
362 | static | |
363 | int init_thread_quit_pipe(void) | |
364 | { | |
a02de639 | 365 | int ret; |
b8aa1682 | 366 | |
a02de639 | 367 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 368 | |
b8aa1682 JD |
369 | return ret; |
370 | } | |
371 | ||
372 | /* | |
373 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
374 | */ | |
375 | static | |
376 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
377 | { | |
378 | int ret; | |
379 | ||
380 | if (events == NULL || size == 0) { | |
381 | ret = -1; | |
382 | goto error; | |
383 | } | |
384 | ||
385 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
386 | if (ret < 0) { | |
387 | goto error; | |
388 | } | |
389 | ||
390 | /* Add quit pipe */ | |
391 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
392 | if (ret < 0) { | |
393 | goto error; | |
394 | } | |
395 | ||
396 | return 0; | |
397 | ||
398 | error: | |
399 | return ret; | |
400 | } | |
401 | ||
402 | /* | |
403 | * Check if the thread quit pipe was triggered. | |
404 | * | |
405 | * Return 1 if it was triggered else 0; | |
406 | */ | |
407 | static | |
408 | int check_thread_quit_pipe(int fd, uint32_t events) | |
409 | { | |
410 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
411 | return 1; | |
412 | } | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | /* | |
418 | * Create and init socket from uri. | |
419 | */ | |
420 | static | |
421 | struct lttcomm_sock *relay_init_sock(struct lttng_uri *uri) | |
422 | { | |
423 | int ret; | |
424 | struct lttcomm_sock *sock = NULL; | |
425 | ||
426 | sock = lttcomm_alloc_sock_from_uri(uri); | |
427 | if (sock == NULL) { | |
428 | ERR("Allocating socket"); | |
429 | goto error; | |
430 | } | |
431 | ||
432 | ret = lttcomm_create_sock(sock); | |
433 | if (ret < 0) { | |
434 | goto error; | |
435 | } | |
436 | DBG("Listening on sock %d", sock->fd); | |
437 | ||
438 | ret = sock->ops->bind(sock); | |
439 | if (ret < 0) { | |
440 | goto error; | |
441 | } | |
442 | ||
443 | ret = sock->ops->listen(sock, -1); | |
444 | if (ret < 0) { | |
445 | goto error; | |
446 | ||
447 | } | |
448 | ||
449 | return sock; | |
450 | ||
451 | error: | |
452 | if (sock) { | |
453 | lttcomm_destroy_sock(sock); | |
454 | } | |
455 | return NULL; | |
456 | } | |
457 | ||
173af62f DG |
458 | /* |
459 | * Return nonzero if stream needs to be closed. | |
460 | */ | |
461 | static | |
462 | int close_stream_check(struct relay_stream *stream) | |
463 | { | |
464 | ||
465 | if (stream->close_flag && stream->prev_seq == stream->last_net_seq_num) { | |
f7079f67 DG |
466 | /* |
467 | * We are about to close the stream so set the data pending flag to 1 | |
468 | * which will make the end data pending command skip the stream which | |
469 | * is now closed and ready. Note that after proceeding to a file close, | |
470 | * the written file is ready for reading. | |
471 | */ | |
472 | stream->data_pending_check_done = 1; | |
173af62f DG |
473 | return 1; |
474 | } | |
475 | return 0; | |
476 | } | |
477 | ||
b8aa1682 JD |
478 | /* |
479 | * This thread manages the listening for new connections on the network | |
480 | */ | |
481 | static | |
482 | void *relay_thread_listener(void *data) | |
483 | { | |
095a4ae5 | 484 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
485 | int val = 1; |
486 | uint32_t revents, nb_fd; | |
487 | struct lttng_poll_event events; | |
488 | struct lttcomm_sock *control_sock, *data_sock; | |
489 | ||
b8aa1682 JD |
490 | DBG("[thread] Relay listener started"); |
491 | ||
492 | control_sock = relay_init_sock(control_uri); | |
493 | if (!control_sock) { | |
095a4ae5 | 494 | goto error_sock_control; |
b8aa1682 JD |
495 | } |
496 | ||
497 | data_sock = relay_init_sock(data_uri); | |
498 | if (!data_sock) { | |
095a4ae5 | 499 | goto error_sock_relay; |
b8aa1682 JD |
500 | } |
501 | ||
502 | /* | |
503 | * Pass 3 as size here for the thread quit pipe, control and data socket. | |
504 | */ | |
505 | ret = create_thread_poll_set(&events, 3); | |
506 | if (ret < 0) { | |
507 | goto error_create_poll; | |
508 | } | |
509 | ||
510 | /* Add the control socket */ | |
511 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
512 | if (ret < 0) { | |
513 | goto error_poll_add; | |
514 | } | |
515 | ||
516 | /* Add the data socket */ | |
517 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
518 | if (ret < 0) { | |
519 | goto error_poll_add; | |
520 | } | |
521 | ||
522 | while (1) { | |
523 | DBG("Listener accepting connections"); | |
524 | ||
b8aa1682 JD |
525 | restart: |
526 | ret = lttng_poll_wait(&events, -1); | |
527 | if (ret < 0) { | |
528 | /* | |
529 | * Restart interrupted system call. | |
530 | */ | |
531 | if (errno == EINTR) { | |
532 | goto restart; | |
533 | } | |
534 | goto error; | |
535 | } | |
536 | ||
0d9c5d77 DG |
537 | nb_fd = ret; |
538 | ||
b8aa1682 JD |
539 | DBG("Relay new connection received"); |
540 | for (i = 0; i < nb_fd; i++) { | |
541 | /* Fetch once the poll data */ | |
542 | revents = LTTNG_POLL_GETEV(&events, i); | |
543 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
544 | ||
545 | /* Thread quit pipe has been closed. Killing thread. */ | |
546 | ret = check_thread_quit_pipe(pollfd, revents); | |
547 | if (ret) { | |
095a4ae5 MD |
548 | err = 0; |
549 | goto exit; | |
b8aa1682 JD |
550 | } |
551 | ||
552 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
553 | ERR("socket poll error"); | |
554 | goto error; | |
555 | } else if (revents & LPOLLIN) { | |
4b7f17b2 MD |
556 | /* |
557 | * Get allocated in this thread, | |
558 | * enqueued to a global queue, dequeued | |
559 | * and freed in the worker thread. | |
560 | */ | |
561 | struct relay_command *relay_cmd; | |
562 | struct lttcomm_sock *newsock; | |
b8aa1682 JD |
563 | |
564 | relay_cmd = zmalloc(sizeof(struct relay_command)); | |
565 | if (relay_cmd == NULL) { | |
566 | PERROR("relay command zmalloc"); | |
567 | goto error; | |
568 | } | |
569 | ||
570 | if (pollfd == data_sock->fd) { | |
571 | newsock = data_sock->ops->accept(data_sock); | |
4b7f17b2 | 572 | if (!newsock) { |
b8aa1682 | 573 | PERROR("accepting data sock"); |
4b7f17b2 | 574 | free(relay_cmd); |
b8aa1682 JD |
575 | goto error; |
576 | } | |
577 | relay_cmd->type = RELAY_DATA; | |
578 | DBG("Relay data connection accepted, socket %d", newsock->fd); | |
4b7f17b2 MD |
579 | } else { |
580 | assert(pollfd == control_sock->fd); | |
b8aa1682 | 581 | newsock = control_sock->ops->accept(control_sock); |
4b7f17b2 | 582 | if (!newsock) { |
b8aa1682 | 583 | PERROR("accepting control sock"); |
4b7f17b2 | 584 | free(relay_cmd); |
b8aa1682 JD |
585 | goto error; |
586 | } | |
587 | relay_cmd->type = RELAY_CONTROL; | |
588 | DBG("Relay control connection accepted, socket %d", newsock->fd); | |
589 | } | |
590 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, | |
591 | &val, sizeof(int)); | |
592 | if (ret < 0) { | |
593 | PERROR("setsockopt inet"); | |
4b7f17b2 MD |
594 | lttcomm_destroy_sock(newsock); |
595 | free(relay_cmd); | |
b8aa1682 JD |
596 | goto error; |
597 | } | |
598 | relay_cmd->sock = newsock; | |
599 | /* | |
600 | * Lock free enqueue the request. | |
601 | */ | |
602 | cds_wfq_enqueue(&relay_cmd_queue.queue, &relay_cmd->node); | |
603 | ||
604 | /* | |
605 | * Wake the dispatch queue futex. Implicit memory | |
606 | * barrier with the exchange in cds_wfq_enqueue. | |
607 | */ | |
608 | futex_nto1_wake(&relay_cmd_queue.futex); | |
609 | } | |
610 | } | |
611 | } | |
612 | ||
095a4ae5 | 613 | exit: |
b8aa1682 JD |
614 | error: |
615 | error_poll_add: | |
616 | lttng_poll_clean(&events); | |
617 | error_create_poll: | |
095a4ae5 MD |
618 | if (data_sock->fd >= 0) { |
619 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
620 | if (ret) { |
621 | PERROR("close"); | |
622 | } | |
b8aa1682 | 623 | } |
095a4ae5 MD |
624 | lttcomm_destroy_sock(data_sock); |
625 | error_sock_relay: | |
626 | if (control_sock->fd >= 0) { | |
627 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
628 | if (ret) { |
629 | PERROR("close"); | |
630 | } | |
b8aa1682 | 631 | } |
095a4ae5 MD |
632 | lttcomm_destroy_sock(control_sock); |
633 | error_sock_control: | |
634 | if (err) { | |
635 | DBG("Thread exited with error"); | |
636 | } | |
b8aa1682 JD |
637 | DBG("Relay listener thread cleanup complete"); |
638 | stop_threads(); | |
b8aa1682 JD |
639 | return NULL; |
640 | } | |
641 | ||
642 | /* | |
643 | * This thread manages the dispatching of the requests to worker threads | |
644 | */ | |
645 | static | |
646 | void *relay_thread_dispatcher(void *data) | |
647 | { | |
648 | int ret; | |
649 | struct cds_wfq_node *node; | |
650 | struct relay_command *relay_cmd = NULL; | |
651 | ||
652 | DBG("[thread] Relay dispatcher started"); | |
653 | ||
26c9d55e | 654 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
b8aa1682 JD |
655 | /* Atomically prepare the queue futex */ |
656 | futex_nto1_prepare(&relay_cmd_queue.futex); | |
657 | ||
658 | do { | |
659 | /* Dequeue commands */ | |
660 | node = cds_wfq_dequeue_blocking(&relay_cmd_queue.queue); | |
661 | if (node == NULL) { | |
662 | DBG("Woken up but nothing in the relay command queue"); | |
663 | /* Continue thread execution */ | |
664 | break; | |
665 | } | |
666 | ||
667 | relay_cmd = caa_container_of(node, struct relay_command, node); | |
668 | DBG("Dispatching request waiting on sock %d", relay_cmd->sock->fd); | |
669 | ||
670 | /* | |
671 | * Inform worker thread of the new request. This | |
672 | * call is blocking so we can be assured that the data will be read | |
673 | * at some point in time or wait to the end of the world :) | |
674 | */ | |
6f94560a MD |
675 | do { |
676 | ret = write(relay_cmd_pipe[1], relay_cmd, | |
677 | sizeof(struct relay_command)); | |
678 | } while (ret < 0 && errno == EINTR); | |
b8aa1682 | 679 | free(relay_cmd); |
4cec016f | 680 | if (ret < 0 || ret != sizeof(struct relay_command)) { |
b8aa1682 JD |
681 | PERROR("write cmd pipe"); |
682 | goto error; | |
683 | } | |
684 | } while (node != NULL); | |
685 | ||
686 | /* Futex wait on queue. Blocking call on futex() */ | |
687 | futex_nto1_wait(&relay_cmd_queue.futex); | |
688 | } | |
689 | ||
690 | error: | |
691 | DBG("Dispatch thread dying"); | |
692 | stop_threads(); | |
693 | return NULL; | |
694 | } | |
695 | ||
de91f48a DG |
696 | /* |
697 | * Get stream from stream id. | |
698 | * Need to be called with RCU read-side lock held. | |
699 | */ | |
700 | static | |
701 | struct relay_stream *relay_stream_from_stream_id(uint64_t stream_id, | |
702 | struct lttng_ht *streams_ht) | |
703 | { | |
704 | struct lttng_ht_node_ulong *node; | |
705 | struct lttng_ht_iter iter; | |
706 | struct relay_stream *ret; | |
707 | ||
708 | lttng_ht_lookup(streams_ht, | |
709 | (void *)((unsigned long) stream_id), | |
710 | &iter); | |
711 | node = lttng_ht_iter_get_node_ulong(&iter); | |
712 | if (node == NULL) { | |
713 | DBG("Relay stream %" PRIu64 " not found", stream_id); | |
714 | ret = NULL; | |
715 | goto end; | |
716 | } | |
717 | ||
718 | ret = caa_container_of(node, struct relay_stream, stream_n); | |
719 | ||
720 | end: | |
721 | return ret; | |
722 | } | |
723 | ||
9d1bbf21 MD |
724 | static |
725 | void deferred_free_stream(struct rcu_head *head) | |
726 | { | |
727 | struct relay_stream *stream = | |
728 | caa_container_of(head, struct relay_stream, rcu_node); | |
0f907de1 JD |
729 | free(stream->path_name); |
730 | free(stream->channel_name); | |
9d1bbf21 MD |
731 | free(stream); |
732 | } | |
733 | ||
b8aa1682 JD |
734 | /* |
735 | * relay_delete_session: Free all memory associated with a session and | |
736 | * close all the FDs | |
737 | */ | |
738 | static | |
739 | void relay_delete_session(struct relay_command *cmd, struct lttng_ht *streams_ht) | |
740 | { | |
741 | struct lttng_ht_iter iter; | |
742 | struct lttng_ht_node_ulong *node; | |
743 | struct relay_stream *stream; | |
744 | int ret; | |
745 | ||
095a4ae5 | 746 | if (!cmd->session) { |
b8aa1682 | 747 | return; |
095a4ae5 | 748 | } |
b8aa1682 | 749 | |
77c7c900 | 750 | DBG("Relay deleting session %" PRIu64, cmd->session->id); |
5b6d8097 | 751 | |
9d1bbf21 | 752 | rcu_read_lock(); |
b8aa1682 JD |
753 | cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, node, node) { |
754 | node = lttng_ht_iter_get_node_ulong(&iter); | |
755 | if (node) { | |
756 | stream = caa_container_of(node, | |
757 | struct relay_stream, stream_n); | |
758 | if (stream->session == cmd->session) { | |
f66c074c DG |
759 | ret = close(stream->fd); |
760 | if (ret < 0) { | |
761 | PERROR("close stream fd on delete session"); | |
762 | } | |
b8aa1682 JD |
763 | ret = lttng_ht_del(streams_ht, &iter); |
764 | assert(!ret); | |
9d1bbf21 MD |
765 | call_rcu(&stream->rcu_node, |
766 | deferred_free_stream); | |
b8aa1682 | 767 | } |
1c20f0e2 JD |
768 | /* Cleanup index of that stream. */ |
769 | relay_index_destroy_by_stream_id(stream->stream_handle, | |
770 | indexes_ht); | |
b8aa1682 JD |
771 | } |
772 | } | |
9d1bbf21 | 773 | rcu_read_unlock(); |
5b6d8097 DG |
774 | |
775 | free(cmd->session); | |
b8aa1682 JD |
776 | } |
777 | ||
1c20f0e2 JD |
778 | /* |
779 | * Copy index data from the control port to a given index object. | |
780 | */ | |
781 | static void copy_index_control_data(struct relay_index *index, | |
782 | struct lttcomm_relayd_index *data) | |
783 | { | |
784 | assert(index); | |
785 | assert(data); | |
786 | ||
787 | /* | |
788 | * The index on disk is encoded in big endian, so we don't need to convert | |
789 | * the data received on the network. The data_offset value is NEVER | |
790 | * modified here and is updated by the data thread. | |
791 | */ | |
792 | index->index_data.packet_size = data->packet_size; | |
793 | index->index_data.content_size = data->content_size; | |
794 | index->index_data.timestamp_begin = data->timestamp_begin; | |
795 | index->index_data.timestamp_end = data->timestamp_end; | |
796 | index->index_data.events_discarded = data->events_discarded; | |
797 | index->index_data.stream_id = data->stream_id; | |
798 | } | |
799 | ||
c5b6f4f0 DG |
800 | /* |
801 | * Handle the RELAYD_CREATE_SESSION command. | |
802 | * | |
803 | * On success, send back the session id or else return a negative value. | |
804 | */ | |
805 | static | |
806 | int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, | |
807 | struct relay_command *cmd) | |
808 | { | |
809 | int ret = 0, send_ret; | |
810 | struct relay_session *session; | |
811 | struct lttcomm_relayd_status_session reply; | |
812 | ||
813 | assert(recv_hdr); | |
814 | assert(cmd); | |
815 | ||
816 | memset(&reply, 0, sizeof(reply)); | |
817 | ||
818 | session = zmalloc(sizeof(struct relay_session)); | |
819 | if (session == NULL) { | |
820 | PERROR("relay session zmalloc"); | |
821 | ret = -1; | |
822 | goto error; | |
823 | } | |
824 | ||
825 | session->id = ++last_relay_session_id; | |
826 | session->sock = cmd->sock; | |
827 | cmd->session = session; | |
828 | ||
829 | reply.session_id = htobe64(session->id); | |
830 | ||
831 | DBG("Created session %" PRIu64, session->id); | |
832 | ||
833 | error: | |
834 | if (ret < 0) { | |
835 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
836 | } else { | |
837 | reply.ret_code = htobe32(LTTNG_OK); | |
838 | } | |
839 | ||
840 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
841 | if (send_ret < 0) { | |
842 | ERR("Relayd sending session id"); | |
4169f5ad | 843 | ret = send_ret; |
c5b6f4f0 DG |
844 | } |
845 | ||
846 | return ret; | |
847 | } | |
848 | ||
b8aa1682 JD |
849 | /* |
850 | * relay_add_stream: allocate a new stream for a session | |
851 | */ | |
852 | static | |
853 | int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
854 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
855 | { | |
856 | struct relay_session *session = cmd->session; | |
b8aa1682 JD |
857 | struct relay_stream *stream = NULL; |
858 | struct lttcomm_relayd_status_stream reply; | |
b8aa1682 JD |
859 | int ret, send_ret; |
860 | ||
c5b6f4f0 | 861 | if (!session || cmd->version_check_done == 0) { |
b8aa1682 JD |
862 | ERR("Trying to add a stream before version check"); |
863 | ret = -1; | |
864 | goto end_no_session; | |
865 | } | |
866 | ||
b8aa1682 JD |
867 | stream = zmalloc(sizeof(struct relay_stream)); |
868 | if (stream == NULL) { | |
869 | PERROR("relay stream zmalloc"); | |
870 | ret = -1; | |
871 | goto end_no_session; | |
872 | } | |
873 | ||
0f907de1 JD |
874 | switch (cmd->minor) { |
875 | case 1: /* LTTng sessiond 2.1 */ | |
876 | ret = cmd_recv_stream_2_1(cmd, stream); | |
877 | break; | |
878 | case 2: /* LTTng sessiond 2.2 */ | |
879 | default: | |
880 | ret = cmd_recv_stream_2_2(cmd, stream); | |
881 | break; | |
882 | } | |
883 | if (ret < 0) { | |
884 | goto err_free_stream; | |
885 | } | |
886 | ||
9d1bbf21 | 887 | rcu_read_lock(); |
b8aa1682 | 888 | stream->stream_handle = ++last_relay_stream_id; |
173af62f | 889 | stream->prev_seq = -1ULL; |
b8aa1682 | 890 | stream->session = session; |
1c20f0e2 | 891 | stream->index_fd = -1; |
b8aa1682 | 892 | |
0f907de1 | 893 | ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG); |
b8aa1682 | 894 | if (ret < 0) { |
b8aa1682 JD |
895 | ERR("relay creating output directory"); |
896 | goto end; | |
897 | } | |
898 | ||
be96a7d1 DG |
899 | /* |
900 | * No need to use run_as API here because whatever we receives, the relayd | |
901 | * uses its own credentials for the stream files. | |
902 | */ | |
0f907de1 | 903 | ret = utils_create_stream_file(stream->path_name, stream->channel_name, |
1c20f0e2 | 904 | stream->tracefile_size, 0, relayd_uid, relayd_gid, NULL); |
b8aa1682 | 905 | if (ret < 0) { |
0f907de1 | 906 | ERR("Create output file"); |
b8aa1682 JD |
907 | goto end; |
908 | } | |
b8aa1682 | 909 | stream->fd = ret; |
0f907de1 JD |
910 | if (stream->tracefile_size) { |
911 | DBG("Tracefile %s/%s_0 created", stream->path_name, stream->channel_name); | |
912 | } else { | |
913 | DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name); | |
914 | } | |
b8aa1682 JD |
915 | |
916 | lttng_ht_node_init_ulong(&stream->stream_n, | |
917 | (unsigned long) stream->stream_handle); | |
918 | lttng_ht_add_unique_ulong(streams_ht, | |
919 | &stream->stream_n); | |
920 | ||
1c20f0e2 JD |
921 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
922 | stream->stream_handle); | |
b8aa1682 JD |
923 | |
924 | end: | |
5af40280 | 925 | reply.handle = htobe64(stream->stream_handle); |
b8aa1682 JD |
926 | /* send the session id to the client or a negative return code on error */ |
927 | if (ret < 0) { | |
f73fabfd | 928 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5af40280 CB |
929 | /* stream was not properly added to the ht, so free it */ |
930 | free(stream); | |
b8aa1682 | 931 | } else { |
f73fabfd | 932 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 933 | } |
5af40280 | 934 | |
b8aa1682 JD |
935 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, |
936 | sizeof(struct lttcomm_relayd_status_stream), 0); | |
937 | if (send_ret < 0) { | |
938 | ERR("Relay sending stream id"); | |
4169f5ad | 939 | ret = send_ret; |
b8aa1682 | 940 | } |
9d1bbf21 | 941 | rcu_read_unlock(); |
b8aa1682 JD |
942 | |
943 | end_no_session: | |
944 | return ret; | |
0f907de1 JD |
945 | |
946 | err_free_stream: | |
947 | free(stream->path_name); | |
948 | free(stream->channel_name); | |
949 | free(stream); | |
950 | return ret; | |
b8aa1682 JD |
951 | } |
952 | ||
173af62f DG |
953 | /* |
954 | * relay_close_stream: close a specific stream | |
955 | */ | |
956 | static | |
957 | int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
958 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
959 | { | |
960 | struct relay_session *session = cmd->session; | |
961 | struct lttcomm_relayd_close_stream stream_info; | |
962 | struct lttcomm_relayd_generic_reply reply; | |
963 | struct relay_stream *stream; | |
964 | int ret, send_ret; | |
173af62f DG |
965 | struct lttng_ht_iter iter; |
966 | ||
967 | DBG("Close stream received"); | |
968 | ||
c5b6f4f0 | 969 | if (!session || cmd->version_check_done == 0) { |
173af62f DG |
970 | ERR("Trying to close a stream before version check"); |
971 | ret = -1; | |
972 | goto end_no_session; | |
973 | } | |
974 | ||
975 | ret = cmd->sock->ops->recvmsg(cmd->sock, &stream_info, | |
7c5aef62 | 976 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f | 977 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
a6cd2b97 DG |
978 | if (ret == 0) { |
979 | /* Orderly shutdown. Not necessary to print an error. */ | |
980 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
981 | } else { | |
982 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
983 | } | |
173af62f DG |
984 | ret = -1; |
985 | goto end_no_session; | |
986 | } | |
987 | ||
988 | rcu_read_lock(); | |
de91f48a DG |
989 | stream = relay_stream_from_stream_id(be64toh(stream_info.stream_id), |
990 | streams_ht); | |
173af62f DG |
991 | if (!stream) { |
992 | ret = -1; | |
993 | goto end_unlock; | |
994 | } | |
995 | ||
8e2583a4 | 996 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
173af62f DG |
997 | stream->close_flag = 1; |
998 | ||
999 | if (close_stream_check(stream)) { | |
1000 | int delret; | |
1001 | ||
f66c074c DG |
1002 | delret = close(stream->fd); |
1003 | if (delret < 0) { | |
1004 | PERROR("close stream"); | |
1005 | } | |
1c20f0e2 JD |
1006 | |
1007 | if (stream->index_fd >= 0) { | |
1008 | delret = close(stream->index_fd); | |
1009 | if (delret < 0) { | |
1010 | PERROR("close stream index_fd"); | |
1011 | } | |
1012 | } | |
de91f48a | 1013 | iter.iter.node = &stream->stream_n.node; |
173af62f DG |
1014 | delret = lttng_ht_del(streams_ht, &iter); |
1015 | assert(!delret); | |
1016 | call_rcu(&stream->rcu_node, | |
1017 | deferred_free_stream); | |
1018 | DBG("Closed tracefile %d from close stream", stream->fd); | |
1019 | } | |
1020 | ||
1021 | end_unlock: | |
1022 | rcu_read_unlock(); | |
1023 | ||
1024 | if (ret < 0) { | |
f73fabfd | 1025 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1026 | } else { |
f73fabfd | 1027 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f DG |
1028 | } |
1029 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1030 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1031 | if (send_ret < 0) { | |
1032 | ERR("Relay sending stream id"); | |
4169f5ad | 1033 | ret = send_ret; |
173af62f DG |
1034 | } |
1035 | ||
1036 | end_no_session: | |
1037 | return ret; | |
1038 | } | |
1039 | ||
b8aa1682 JD |
1040 | /* |
1041 | * relay_unknown_command: send -1 if received unknown command | |
1042 | */ | |
1043 | static | |
1044 | void relay_unknown_command(struct relay_command *cmd) | |
1045 | { | |
1046 | struct lttcomm_relayd_generic_reply reply; | |
1047 | int ret; | |
1048 | ||
f73fabfd | 1049 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1050 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, |
1051 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1052 | if (ret < 0) { | |
1053 | ERR("Relay sending unknown command"); | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | /* | |
1058 | * relay_start: send an acknowledgment to the client to tell if we are | |
1059 | * ready to receive data. We are ready if a session is established. | |
1060 | */ | |
1061 | static | |
1062 | int relay_start(struct lttcomm_relayd_hdr *recv_hdr, | |
1063 | struct relay_command *cmd) | |
1064 | { | |
f73fabfd | 1065 | int ret = htobe32(LTTNG_OK); |
b8aa1682 JD |
1066 | struct lttcomm_relayd_generic_reply reply; |
1067 | struct relay_session *session = cmd->session; | |
1068 | ||
1069 | if (!session) { | |
1070 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1071 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1072 | } |
1073 | ||
1074 | reply.ret_code = ret; | |
1075 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1076 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1077 | if (ret < 0) { | |
1078 | ERR("Relay sending start ack"); | |
1079 | } | |
1080 | ||
1081 | return ret; | |
1082 | } | |
1083 | ||
1d4dfdef DG |
1084 | /* |
1085 | * Append padding to the file pointed by the file descriptor fd. | |
1086 | */ | |
1087 | static int write_padding_to_file(int fd, uint32_t size) | |
1088 | { | |
1089 | int ret = 0; | |
1090 | char *zeros; | |
1091 | ||
1092 | if (size == 0) { | |
1093 | goto end; | |
1094 | } | |
1095 | ||
1096 | zeros = zmalloc(size); | |
1097 | if (zeros == NULL) { | |
1098 | PERROR("zmalloc zeros for padding"); | |
1099 | ret = -1; | |
1100 | goto end; | |
1101 | } | |
1102 | ||
1103 | do { | |
1104 | ret = write(fd, zeros, size); | |
1105 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 1106 | if (ret < 0 || ret != size) { |
1d4dfdef DG |
1107 | PERROR("write padding to file"); |
1108 | } | |
1109 | ||
e986c7a1 DG |
1110 | free(zeros); |
1111 | ||
1d4dfdef DG |
1112 | end: |
1113 | return ret; | |
1114 | } | |
1115 | ||
b8aa1682 JD |
1116 | /* |
1117 | * relay_recv_metadata: receive the metada for the session. | |
1118 | */ | |
1119 | static | |
1120 | int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, | |
1121 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
1122 | { | |
f73fabfd | 1123 | int ret = htobe32(LTTNG_OK); |
b8aa1682 JD |
1124 | struct relay_session *session = cmd->session; |
1125 | struct lttcomm_relayd_metadata_payload *metadata_struct; | |
1126 | struct relay_stream *metadata_stream; | |
1127 | uint64_t data_size, payload_size; | |
1128 | ||
1129 | if (!session) { | |
1130 | ERR("Metadata sent before version check"); | |
1131 | ret = -1; | |
1132 | goto end; | |
1133 | } | |
1134 | ||
f6416125 MD |
1135 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1136 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1137 | ERR("Incorrect data size"); | |
1138 | ret = -1; | |
1139 | goto end; | |
1140 | } | |
1141 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1142 | ||
b8aa1682 | 1143 | if (data_buffer_size < data_size) { |
d7b3776f | 1144 | /* In case the realloc fails, we can free the memory */ |
c617c0c6 MD |
1145 | char *tmp_data_ptr; |
1146 | ||
1147 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1148 | if (!tmp_data_ptr) { | |
b8aa1682 | 1149 | ERR("Allocating data buffer"); |
c617c0c6 | 1150 | free(data_buffer); |
b8aa1682 JD |
1151 | ret = -1; |
1152 | goto end; | |
1153 | } | |
c617c0c6 | 1154 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1155 | data_buffer_size = data_size; |
1156 | } | |
1157 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1158 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
7c5aef62 | 1159 | ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0); |
b8aa1682 | 1160 | if (ret < 0 || ret != data_size) { |
a6cd2b97 DG |
1161 | if (ret == 0) { |
1162 | /* Orderly shutdown. Not necessary to print an error. */ | |
1163 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1164 | } else { | |
1165 | ERR("Relay didn't receive the whole metadata"); | |
1166 | } | |
b8aa1682 | 1167 | ret = -1; |
b8aa1682 JD |
1168 | goto end; |
1169 | } | |
1170 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 MD |
1171 | |
1172 | rcu_read_lock(); | |
b8aa1682 JD |
1173 | metadata_stream = relay_stream_from_stream_id( |
1174 | be64toh(metadata_struct->stream_id), streams_ht); | |
1175 | if (!metadata_stream) { | |
1176 | ret = -1; | |
9d1bbf21 | 1177 | goto end_unlock; |
b8aa1682 JD |
1178 | } |
1179 | ||
6f94560a MD |
1180 | do { |
1181 | ret = write(metadata_stream->fd, metadata_struct->payload, | |
1182 | payload_size); | |
1183 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 1184 | if (ret < 0 || ret != payload_size) { |
b8aa1682 JD |
1185 | ERR("Relay error writing metadata on file"); |
1186 | ret = -1; | |
9d1bbf21 | 1187 | goto end_unlock; |
b8aa1682 | 1188 | } |
1d4dfdef DG |
1189 | |
1190 | ret = write_padding_to_file(metadata_stream->fd, | |
1191 | be32toh(metadata_struct->padding_size)); | |
1192 | if (ret < 0) { | |
1193 | goto end_unlock; | |
1194 | } | |
1195 | ||
b8aa1682 JD |
1196 | DBG2("Relay metadata written"); |
1197 | ||
9d1bbf21 | 1198 | end_unlock: |
6e3c5836 | 1199 | rcu_read_unlock(); |
b8aa1682 JD |
1200 | end: |
1201 | return ret; | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * relay_send_version: send relayd version number | |
1206 | */ | |
1207 | static | |
1208 | int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, | |
d4519fa3 | 1209 | struct relay_command *cmd, struct lttng_ht *streams_ht) |
b8aa1682 | 1210 | { |
7f51dcba | 1211 | int ret; |
092b6259 | 1212 | struct lttcomm_relayd_version reply, msg; |
b8aa1682 | 1213 | |
c5b6f4f0 DG |
1214 | assert(cmd); |
1215 | ||
1216 | cmd->version_check_done = 1; | |
b8aa1682 | 1217 | |
092b6259 | 1218 | /* Get version from the other side. */ |
7c5aef62 | 1219 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); |
092b6259 | 1220 | if (ret < 0 || ret != sizeof(msg)) { |
a6cd2b97 DG |
1221 | if (ret == 0) { |
1222 | /* Orderly shutdown. Not necessary to print an error. */ | |
1223 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1224 | } else { | |
1225 | ERR("Relay failed to receive the version values."); | |
1226 | } | |
092b6259 | 1227 | ret = -1; |
092b6259 DG |
1228 | goto end; |
1229 | } | |
1230 | ||
d83a952c MD |
1231 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1232 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1233 | |
1234 | /* Major versions must be the same */ | |
1235 | if (reply.major != be32toh(msg.major)) { | |
6151a90f JD |
1236 | DBG("Incompatible major versions (%u vs %u), deleting session", |
1237 | reply.major, be32toh(msg.major)); | |
d4519fa3 JD |
1238 | relay_delete_session(cmd, streams_ht); |
1239 | ret = 0; | |
1240 | goto end; | |
1241 | } | |
1242 | ||
0f907de1 JD |
1243 | cmd->major = reply.major; |
1244 | /* We adapt to the lowest compatible version */ | |
1245 | if (reply.minor <= be32toh(msg.minor)) { | |
1246 | cmd->minor = reply.minor; | |
1247 | } else { | |
1248 | cmd->minor = be32toh(msg.minor); | |
1249 | } | |
1250 | ||
6151a90f JD |
1251 | reply.major = htobe32(reply.major); |
1252 | reply.minor = htobe32(reply.minor); | |
1253 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1254 | sizeof(struct lttcomm_relayd_version), 0); | |
1255 | if (ret < 0) { | |
1256 | ERR("Relay sending version"); | |
1257 | } | |
1258 | ||
0f907de1 JD |
1259 | DBG("Version check done using protocol %u.%u", cmd->major, |
1260 | cmd->minor); | |
b8aa1682 JD |
1261 | |
1262 | end: | |
1263 | return ret; | |
1264 | } | |
1265 | ||
c8f59ee5 | 1266 | /* |
6d805429 | 1267 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 DG |
1268 | */ |
1269 | static | |
6d805429 | 1270 | int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
c8f59ee5 DG |
1271 | struct relay_command *cmd, struct lttng_ht *streams_ht) |
1272 | { | |
1273 | struct relay_session *session = cmd->session; | |
6d805429 | 1274 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1275 | struct lttcomm_relayd_generic_reply reply; |
1276 | struct relay_stream *stream; | |
1277 | int ret; | |
c8f59ee5 DG |
1278 | uint64_t last_net_seq_num, stream_id; |
1279 | ||
6d805429 | 1280 | DBG("Data pending command received"); |
c8f59ee5 | 1281 | |
c5b6f4f0 | 1282 | if (!session || cmd->version_check_done == 0) { |
c8f59ee5 DG |
1283 | ERR("Trying to check for data before version check"); |
1284 | ret = -1; | |
1285 | goto end_no_session; | |
1286 | } | |
1287 | ||
7c5aef62 | 1288 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1289 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1290 | if (ret == 0) { |
1291 | /* Orderly shutdown. Not necessary to print an error. */ | |
1292 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1293 | } else { | |
1294 | ERR("Relay didn't receive valid data_pending struct size : %d", | |
1295 | ret); | |
1296 | } | |
c8f59ee5 DG |
1297 | ret = -1; |
1298 | goto end_no_session; | |
1299 | } | |
1300 | ||
1301 | stream_id = be64toh(msg.stream_id); | |
1302 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1303 | ||
1304 | rcu_read_lock(); | |
de91f48a DG |
1305 | stream = relay_stream_from_stream_id(stream_id, streams_ht); |
1306 | if (stream == NULL) { | |
c8f59ee5 DG |
1307 | ret = -1; |
1308 | goto end_unlock; | |
1309 | } | |
1310 | ||
6d805429 | 1311 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1312 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1313 | last_net_seq_num); | |
1314 | ||
33832e64 | 1315 | /* Avoid wrapping issue */ |
39df6d9f | 1316 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) >= 0) { |
6d805429 | 1317 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1318 | ret = 0; |
6d805429 DG |
1319 | } else { |
1320 | /* Data still being streamed thus pending */ | |
1321 | ret = 1; | |
c8f59ee5 DG |
1322 | } |
1323 | ||
f7079f67 DG |
1324 | /* Pending check is now done. */ |
1325 | stream->data_pending_check_done = 1; | |
1326 | ||
c8f59ee5 DG |
1327 | end_unlock: |
1328 | rcu_read_unlock(); | |
1329 | ||
1330 | reply.ret_code = htobe32(ret); | |
1331 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1332 | if (ret < 0) { | |
6d805429 | 1333 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1334 | } |
1335 | ||
1336 | end_no_session: | |
1337 | return ret; | |
1338 | } | |
1339 | ||
1340 | /* | |
1341 | * Wait for the control socket to reach a quiescent state. | |
1342 | * | |
1343 | * Note that for now, when receiving this command from the session daemon, this | |
1344 | * means that every subsequent commands or data received on the control socket | |
1345 | * has been handled. So, this is why we simply return OK here. | |
1346 | */ | |
1347 | static | |
1348 | int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, | |
ad7051c0 | 1349 | struct relay_command *cmd, struct lttng_ht *streams_ht) |
c8f59ee5 DG |
1350 | { |
1351 | int ret; | |
ad7051c0 DG |
1352 | uint64_t stream_id; |
1353 | struct relay_stream *stream; | |
1354 | struct lttng_ht_iter iter; | |
1355 | struct lttcomm_relayd_quiescent_control msg; | |
c8f59ee5 DG |
1356 | struct lttcomm_relayd_generic_reply reply; |
1357 | ||
1358 | DBG("Checking quiescent state on control socket"); | |
1359 | ||
ad7051c0 DG |
1360 | if (!cmd->session || cmd->version_check_done == 0) { |
1361 | ERR("Trying to check for data before version check"); | |
1362 | ret = -1; | |
1363 | goto end_no_session; | |
1364 | } | |
1365 | ||
1366 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1367 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1368 | if (ret == 0) { |
1369 | /* Orderly shutdown. Not necessary to print an error. */ | |
1370 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1371 | } else { | |
1372 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1373 | ret); | |
1374 | } | |
ad7051c0 DG |
1375 | ret = -1; |
1376 | goto end_no_session; | |
1377 | } | |
1378 | ||
1379 | stream_id = be64toh(msg.stream_id); | |
1380 | ||
1381 | rcu_read_lock(); | |
1382 | cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, stream, stream_n.node) { | |
1383 | if (stream->stream_handle == stream_id) { | |
1384 | stream->data_pending_check_done = 1; | |
1385 | DBG("Relay quiescent control pending flag set to %" PRIu64, | |
1386 | stream_id); | |
1387 | break; | |
1388 | } | |
1389 | } | |
1390 | rcu_read_unlock(); | |
1391 | ||
c8f59ee5 DG |
1392 | reply.ret_code = htobe32(LTTNG_OK); |
1393 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1394 | if (ret < 0) { | |
6d805429 | 1395 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1396 | } |
1397 | ||
ad7051c0 | 1398 | end_no_session: |
c8f59ee5 DG |
1399 | return ret; |
1400 | } | |
1401 | ||
f7079f67 DG |
1402 | /* |
1403 | * Initialize a data pending command. This means that a client is about to ask | |
1404 | * for data pending for each stream he/she holds. Simply iterate over all | |
1405 | * streams of a session and set the data_pending_check_done flag. | |
1406 | * | |
1407 | * This command returns to the client a LTTNG_OK code. | |
1408 | */ | |
1409 | static | |
1410 | int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
1411 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
1412 | { | |
1413 | int ret; | |
1414 | struct lttng_ht_iter iter; | |
1415 | struct lttcomm_relayd_begin_data_pending msg; | |
1416 | struct lttcomm_relayd_generic_reply reply; | |
1417 | struct relay_stream *stream; | |
1418 | uint64_t session_id; | |
1419 | ||
1420 | assert(recv_hdr); | |
1421 | assert(cmd); | |
1422 | assert(streams_ht); | |
1423 | ||
1424 | DBG("Init streams for data pending"); | |
1425 | ||
1426 | if (!cmd->session || cmd->version_check_done == 0) { | |
1427 | ERR("Trying to check for data before version check"); | |
1428 | ret = -1; | |
1429 | goto end_no_session; | |
1430 | } | |
1431 | ||
1432 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1433 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1434 | if (ret == 0) { |
1435 | /* Orderly shutdown. Not necessary to print an error. */ | |
1436 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1437 | } else { | |
1438 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1439 | ret); | |
1440 | } | |
f7079f67 DG |
1441 | ret = -1; |
1442 | goto end_no_session; | |
1443 | } | |
1444 | ||
1445 | session_id = be64toh(msg.session_id); | |
1446 | ||
1447 | /* | |
1448 | * Iterate over all streams to set the begin data pending flag. For now, the | |
1449 | * streams are indexed by stream handle so we have to iterate over all | |
1450 | * streams to find the one associated with the right session_id. | |
1451 | */ | |
1452 | rcu_read_lock(); | |
1453 | cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, stream, stream_n.node) { | |
1454 | if (stream->session->id == session_id) { | |
1455 | stream->data_pending_check_done = 0; | |
1456 | DBG("Set begin data pending flag to stream %" PRIu64, | |
1457 | stream->stream_handle); | |
1458 | } | |
1459 | } | |
1460 | rcu_read_unlock(); | |
1461 | ||
1462 | /* All good, send back reply. */ | |
1463 | reply.ret_code = htobe32(LTTNG_OK); | |
1464 | ||
1465 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1466 | if (ret < 0) { | |
1467 | ERR("Relay begin data pending send reply failed"); | |
1468 | } | |
1469 | ||
1470 | end_no_session: | |
1471 | return ret; | |
1472 | } | |
1473 | ||
1474 | /* | |
1475 | * End data pending command. This will check, for a given session id, if each | |
1476 | * stream associated with it has its data_pending_check_done flag set. If not, | |
1477 | * this means that the client lost track of the stream but the data is still | |
1478 | * being streamed on our side. In this case, we inform the client that data is | |
1479 | * inflight. | |
1480 | * | |
1481 | * Return to the client if there is data in flight or not with a ret_code. | |
1482 | */ | |
1483 | static | |
1484 | int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
1485 | struct relay_command *cmd, struct lttng_ht *streams_ht) | |
1486 | { | |
1487 | int ret; | |
1488 | struct lttng_ht_iter iter; | |
1489 | struct lttcomm_relayd_end_data_pending msg; | |
1490 | struct lttcomm_relayd_generic_reply reply; | |
1491 | struct relay_stream *stream; | |
1492 | uint64_t session_id; | |
1493 | uint32_t is_data_inflight = 0; | |
1494 | ||
1495 | assert(recv_hdr); | |
1496 | assert(cmd); | |
1497 | assert(streams_ht); | |
1498 | ||
1499 | DBG("End data pending command"); | |
1500 | ||
1501 | if (!cmd->session || cmd->version_check_done == 0) { | |
1502 | ERR("Trying to check for data before version check"); | |
1503 | ret = -1; | |
1504 | goto end_no_session; | |
1505 | } | |
1506 | ||
1507 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1508 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1509 | if (ret == 0) { |
1510 | /* Orderly shutdown. Not necessary to print an error. */ | |
1511 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1512 | } else { | |
1513 | ERR("Relay didn't receive valid end data_pending struct size: %d", | |
1514 | ret); | |
1515 | } | |
f7079f67 DG |
1516 | ret = -1; |
1517 | goto end_no_session; | |
1518 | } | |
1519 | ||
1520 | session_id = be64toh(msg.session_id); | |
1521 | ||
1522 | /* Iterate over all streams to see if the begin data pending flag is set. */ | |
1523 | rcu_read_lock(); | |
1524 | cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, stream, stream_n.node) { | |
1525 | if (stream->session->id == session_id && | |
1526 | !stream->data_pending_check_done) { | |
1527 | is_data_inflight = 1; | |
1528 | DBG("Data is still in flight for stream %" PRIu64, | |
1529 | stream->stream_handle); | |
1530 | break; | |
1531 | } | |
1532 | } | |
1533 | rcu_read_unlock(); | |
1534 | ||
1535 | /* All good, send back reply. */ | |
1536 | reply.ret_code = htobe32(is_data_inflight); | |
1537 | ||
1538 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1539 | if (ret < 0) { | |
1540 | ERR("Relay end data pending send reply failed"); | |
1541 | } | |
1542 | ||
1543 | end_no_session: | |
1544 | return ret; | |
1545 | } | |
1546 | ||
1c20f0e2 JD |
1547 | /* |
1548 | * Receive an index for a specific stream. | |
1549 | * | |
1550 | * Return 0 on success else a negative value. | |
1551 | */ | |
1552 | static | |
1553 | int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, | |
1554 | struct relay_command *cmd, struct lttng_ht *streams_ht, | |
1555 | struct lttng_ht *indexes_ht) | |
1556 | { | |
1557 | int ret, send_ret, index_created = 0; | |
1558 | struct relay_session *session = cmd->session; | |
1559 | struct lttcomm_relayd_index index_info; | |
1560 | struct relay_index *index, *wr_index = NULL; | |
1561 | struct lttcomm_relayd_generic_reply reply; | |
1562 | struct relay_stream *stream; | |
1563 | uint64_t net_seq_num; | |
1564 | ||
1565 | assert(cmd); | |
1566 | assert(streams_ht); | |
1567 | assert(indexes_ht); | |
1568 | ||
1569 | DBG("Relay receiving index"); | |
1570 | ||
1571 | if (!session || cmd->version_check_done == 0) { | |
1572 | ERR("Trying to close a stream before version check"); | |
1573 | ret = -1; | |
1574 | goto end_no_session; | |
1575 | } | |
1576 | ||
1577 | ret = cmd->sock->ops->recvmsg(cmd->sock, &index_info, | |
1578 | sizeof(index_info), 0); | |
1579 | if (ret < sizeof(index_info)) { | |
1580 | if (ret == 0) { | |
1581 | /* Orderly shutdown. Not necessary to print an error. */ | |
1582 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1583 | } else { | |
1584 | ERR("Relay didn't receive valid index struct size : %d", ret); | |
1585 | } | |
1586 | ret = -1; | |
1587 | goto end_no_session; | |
1588 | } | |
1589 | ||
1590 | net_seq_num = be64toh(index_info.net_seq_num); | |
1591 | ||
1592 | rcu_read_lock(); | |
1593 | stream = relay_stream_from_stream_id(be64toh(index_info.relay_stream_id), | |
1594 | streams_ht); | |
1595 | if (!stream) { | |
1596 | ret = -1; | |
1597 | goto end_rcu_unlock; | |
1598 | } | |
1599 | ||
1600 | index = relay_index_find(stream->stream_handle, net_seq_num, indexes_ht); | |
1601 | if (!index) { | |
1602 | /* A successful creation will add the object to the HT. */ | |
1603 | index = relay_index_create(stream->stream_handle, net_seq_num); | |
1604 | if (!index) { | |
1605 | goto end_rcu_unlock; | |
1606 | } | |
1607 | index_created = 1; | |
1608 | } | |
1609 | ||
1610 | copy_index_control_data(index, &index_info); | |
1611 | ||
1612 | if (index_created) { | |
1613 | /* | |
1614 | * Try to add the relay index object to the hash table. If an object | |
1615 | * already exist, destroy back the index created, set the data in this | |
1616 | * object and write it on disk. | |
1617 | */ | |
1618 | relay_index_add(index, indexes_ht, &wr_index); | |
1619 | if (wr_index) { | |
1620 | copy_index_control_data(wr_index, &index_info); | |
1621 | free(index); | |
1622 | } | |
1623 | } else { | |
1624 | /* The index already exists so write it on disk. */ | |
1625 | wr_index = index; | |
1626 | } | |
1627 | ||
1628 | /* Do we have a writable ready index to write on disk. */ | |
1629 | if (wr_index) { | |
1630 | /* Starting at 2.4, create the index file if none available. */ | |
1631 | if (cmd->minor >= 4 && stream->index_fd < 0) { | |
1632 | ret = index_create_file(stream->path_name, stream->channel_name, | |
1633 | relayd_uid, relayd_gid, stream->tracefile_size, | |
1634 | stream->tracefile_count_current); | |
1635 | if (ret < 0) { | |
1636 | goto end_rcu_unlock; | |
1637 | } | |
1638 | stream->index_fd = ret; | |
1639 | } | |
1640 | ||
1641 | ret = relay_index_write(wr_index->fd, wr_index, indexes_ht); | |
1642 | if (ret < 0) { | |
1643 | goto end_rcu_unlock; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | end_rcu_unlock: | |
1648 | rcu_read_unlock(); | |
1649 | ||
1650 | if (ret < 0) { | |
1651 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1652 | } else { | |
1653 | reply.ret_code = htobe32(LTTNG_OK); | |
1654 | } | |
1655 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1656 | if (send_ret < 0) { | |
1657 | ERR("Relay sending close index id reply"); | |
1658 | ret = send_ret; | |
1659 | } | |
1660 | ||
1661 | end_no_session: | |
1662 | return ret; | |
1663 | } | |
1664 | ||
b8aa1682 JD |
1665 | /* |
1666 | * relay_process_control: Process the commands received on the control socket | |
1667 | */ | |
1668 | static | |
1669 | int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, | |
1c20f0e2 JD |
1670 | struct relay_command *cmd, struct lttng_ht *streams_ht, |
1671 | struct lttng_ht *index_streams_ht, | |
1672 | struct lttng_ht *indexes_ht) | |
b8aa1682 JD |
1673 | { |
1674 | int ret = 0; | |
1675 | ||
1676 | switch (be32toh(recv_hdr->cmd)) { | |
b8aa1682 JD |
1677 | case RELAYD_CREATE_SESSION: |
1678 | ret = relay_create_session(recv_hdr, cmd); | |
1679 | break; | |
b8aa1682 JD |
1680 | case RELAYD_ADD_STREAM: |
1681 | ret = relay_add_stream(recv_hdr, cmd, streams_ht); | |
1682 | break; | |
1683 | case RELAYD_START_DATA: | |
1684 | ret = relay_start(recv_hdr, cmd); | |
1685 | break; | |
1686 | case RELAYD_SEND_METADATA: | |
1687 | ret = relay_recv_metadata(recv_hdr, cmd, streams_ht); | |
1688 | break; | |
1689 | case RELAYD_VERSION: | |
d4519fa3 | 1690 | ret = relay_send_version(recv_hdr, cmd, streams_ht); |
b8aa1682 | 1691 | break; |
173af62f DG |
1692 | case RELAYD_CLOSE_STREAM: |
1693 | ret = relay_close_stream(recv_hdr, cmd, streams_ht); | |
1694 | break; | |
6d805429 DG |
1695 | case RELAYD_DATA_PENDING: |
1696 | ret = relay_data_pending(recv_hdr, cmd, streams_ht); | |
c8f59ee5 DG |
1697 | break; |
1698 | case RELAYD_QUIESCENT_CONTROL: | |
ad7051c0 | 1699 | ret = relay_quiescent_control(recv_hdr, cmd, streams_ht); |
c8f59ee5 | 1700 | break; |
f7079f67 DG |
1701 | case RELAYD_BEGIN_DATA_PENDING: |
1702 | ret = relay_begin_data_pending(recv_hdr, cmd, streams_ht); | |
1703 | break; | |
1704 | case RELAYD_END_DATA_PENDING: | |
1705 | ret = relay_end_data_pending(recv_hdr, cmd, streams_ht); | |
1706 | break; | |
1c20f0e2 JD |
1707 | case RELAYD_SEND_INDEX: |
1708 | ret = relay_recv_index(recv_hdr, cmd, streams_ht, indexes_ht); | |
1709 | break; | |
b8aa1682 JD |
1710 | case RELAYD_UPDATE_SYNC_INFO: |
1711 | default: | |
1712 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
1713 | relay_unknown_command(cmd); | |
1714 | ret = -1; | |
1715 | goto end; | |
1716 | } | |
1717 | ||
1718 | end: | |
1719 | return ret; | |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | * relay_process_data: Process the data received on the data socket | |
1724 | */ | |
1725 | static | |
1c20f0e2 JD |
1726 | int relay_process_data(struct relay_command *cmd, struct lttng_ht *streams_ht, |
1727 | struct lttng_ht *indexes_ht) | |
b8aa1682 | 1728 | { |
1c20f0e2 | 1729 | int ret = 0, rotate_index = 0, index_created = 0; |
b8aa1682 | 1730 | struct relay_stream *stream; |
1c20f0e2 | 1731 | struct relay_index *index, *wr_index = NULL; |
b8aa1682 | 1732 | struct lttcomm_relayd_data_hdr data_hdr; |
1c20f0e2 | 1733 | uint64_t stream_id, data_offset; |
173af62f | 1734 | uint64_t net_seq_num; |
b8aa1682 JD |
1735 | uint32_t data_size; |
1736 | ||
1737 | ret = cmd->sock->ops->recvmsg(cmd->sock, &data_hdr, | |
7c5aef62 | 1738 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 | 1739 | if (ret <= 0) { |
a6cd2b97 DG |
1740 | if (ret == 0) { |
1741 | /* Orderly shutdown. Not necessary to print an error. */ | |
1742 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1743 | } else { | |
1744 | ERR("Unable to receive data header on sock %d", cmd->sock->fd); | |
1745 | } | |
b8aa1682 JD |
1746 | ret = -1; |
1747 | goto end; | |
1748 | } | |
1749 | ||
1750 | stream_id = be64toh(data_hdr.stream_id); | |
9d1bbf21 MD |
1751 | |
1752 | rcu_read_lock(); | |
b8aa1682 JD |
1753 | stream = relay_stream_from_stream_id(stream_id, streams_ht); |
1754 | if (!stream) { | |
1755 | ret = -1; | |
1c20f0e2 | 1756 | goto end_rcu_unlock; |
b8aa1682 JD |
1757 | } |
1758 | ||
1759 | data_size = be32toh(data_hdr.data_size); | |
1760 | if (data_buffer_size < data_size) { | |
c617c0c6 MD |
1761 | char *tmp_data_ptr; |
1762 | ||
1763 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1764 | if (!tmp_data_ptr) { | |
b8aa1682 | 1765 | ERR("Allocating data buffer"); |
c617c0c6 | 1766 | free(data_buffer); |
b8aa1682 | 1767 | ret = -1; |
1c20f0e2 | 1768 | goto end_rcu_unlock; |
b8aa1682 | 1769 | } |
c617c0c6 | 1770 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1771 | data_buffer_size = data_size; |
1772 | } | |
1773 | memset(data_buffer, 0, data_size); | |
1774 | ||
173af62f DG |
1775 | net_seq_num = be64toh(data_hdr.net_seq_num); |
1776 | ||
77c7c900 | 1777 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 1778 | data_size, stream_id, net_seq_num); |
7c5aef62 | 1779 | ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0); |
b8aa1682 | 1780 | if (ret <= 0) { |
a6cd2b97 DG |
1781 | if (ret == 0) { |
1782 | /* Orderly shutdown. Not necessary to print an error. */ | |
1783 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1784 | } | |
b8aa1682 | 1785 | ret = -1; |
1c20f0e2 | 1786 | goto end_rcu_unlock; |
b8aa1682 JD |
1787 | } |
1788 | ||
1c20f0e2 | 1789 | /* Check if a rotation is needed. */ |
0f907de1 JD |
1790 | if (stream->tracefile_size > 0 && |
1791 | (stream->tracefile_size_current + data_size) > | |
1792 | stream->tracefile_size) { | |
1c20f0e2 JD |
1793 | ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, |
1794 | stream->tracefile_size, stream->tracefile_count, | |
1795 | relayd_uid, relayd_gid, stream->fd, | |
1796 | &(stream->tracefile_count_current), &stream->fd); | |
0f907de1 | 1797 | if (ret < 0) { |
1c20f0e2 JD |
1798 | ERR("Rotating stream output file"); |
1799 | goto end_rcu_unlock; | |
0f907de1 | 1800 | } |
a6976990 DG |
1801 | /* Reset current size because we just perform a stream rotation. */ |
1802 | stream->tracefile_size_current = 0; | |
1c20f0e2 JD |
1803 | rotate_index = 1; |
1804 | } | |
1805 | ||
1806 | /* Get data offset because we are about to update the index. */ | |
1807 | data_offset = htobe64(stream->tracefile_size_current); | |
1808 | ||
1809 | /* | |
1810 | * Lookup for an existing index for that stream id/sequence number. If on | |
1811 | * exists, the control thread already received the data for it thus we need | |
1812 | * to write it on disk. | |
1813 | */ | |
1814 | index = relay_index_find(stream_id, net_seq_num, indexes_ht); | |
1815 | if (!index) { | |
1816 | /* A successful creation will add the object to the HT. */ | |
1817 | index = relay_index_create(stream->stream_handle, net_seq_num); | |
1818 | if (!index) { | |
1819 | goto end_rcu_unlock; | |
1820 | } | |
1821 | index_created = 1; | |
1822 | } | |
1823 | ||
1824 | if (rotate_index || stream->index_fd < 0) { | |
1825 | index->to_close_fd = stream->index_fd; | |
1826 | ret = index_create_file(stream->path_name, stream->channel_name, | |
1827 | relayd_uid, relayd_gid, stream->tracefile_size, | |
1828 | stream->tracefile_count_current); | |
1829 | if (ret < 0) { | |
1830 | /* This will close the stream's index fd if one. */ | |
1831 | relay_index_free_safe(index); | |
1832 | goto end_rcu_unlock; | |
1833 | } | |
1834 | stream->index_fd = ret; | |
1835 | } | |
1836 | index->fd = stream->index_fd; | |
1837 | index->index_data.offset = data_offset; | |
1838 | ||
1839 | if (index_created) { | |
1840 | /* | |
1841 | * Try to add the relay index object to the hash table. If an object | |
1842 | * already exist, destroy back the index created and set the data. | |
1843 | */ | |
1844 | relay_index_add(index, indexes_ht, &wr_index); | |
1845 | if (wr_index) { | |
1846 | /* Copy back data from the created index. */ | |
1847 | wr_index->fd = index->fd; | |
1848 | wr_index->to_close_fd = index->to_close_fd; | |
1849 | wr_index->index_data.offset = data_offset; | |
1850 | free(index); | |
1851 | } | |
1852 | } else { | |
1853 | /* The index already exists so write it on disk. */ | |
1854 | wr_index = index; | |
0f907de1 | 1855 | } |
1c20f0e2 JD |
1856 | |
1857 | /* Do we have a writable ready index to write on disk. */ | |
1858 | if (wr_index) { | |
1859 | /* Starting at 2.4, create the index file if none available. */ | |
1860 | if (cmd->minor >= 4 && stream->index_fd < 0) { | |
1861 | ret = index_create_file(stream->path_name, stream->channel_name, | |
1862 | relayd_uid, relayd_gid, stream->tracefile_size, | |
1863 | stream->tracefile_count_current); | |
1864 | if (ret < 0) { | |
1865 | goto end_rcu_unlock; | |
1866 | } | |
1867 | stream->index_fd = ret; | |
1868 | } | |
1869 | ||
1870 | ret = relay_index_write(wr_index->fd, wr_index, indexes_ht); | |
1871 | if (ret < 0) { | |
1872 | goto end_rcu_unlock; | |
1873 | } | |
1874 | } | |
1875 | ||
6f94560a MD |
1876 | do { |
1877 | ret = write(stream->fd, data_buffer, data_size); | |
1878 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 1879 | if (ret < 0 || ret != data_size) { |
b8aa1682 JD |
1880 | ERR("Relay error writing data to file"); |
1881 | ret = -1; | |
1c20f0e2 | 1882 | goto end_rcu_unlock; |
b8aa1682 | 1883 | } |
1d4dfdef | 1884 | |
5ab7344e JD |
1885 | DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64, |
1886 | ret, stream->stream_handle); | |
1887 | ||
1d4dfdef DG |
1888 | ret = write_padding_to_file(stream->fd, be32toh(data_hdr.padding_size)); |
1889 | if (ret < 0) { | |
1c20f0e2 | 1890 | goto end_rcu_unlock; |
1d4dfdef | 1891 | } |
1c20f0e2 | 1892 | stream->tracefile_size_current += data_size + be32toh(data_hdr.padding_size); |
1d4dfdef | 1893 | |
173af62f DG |
1894 | stream->prev_seq = net_seq_num; |
1895 | ||
1896 | /* Check if we need to close the FD */ | |
1897 | if (close_stream_check(stream)) { | |
f66c074c | 1898 | int cret; |
173af62f DG |
1899 | struct lttng_ht_iter iter; |
1900 | ||
f66c074c DG |
1901 | cret = close(stream->fd); |
1902 | if (cret < 0) { | |
1903 | PERROR("close stream process data"); | |
1904 | } | |
1c20f0e2 JD |
1905 | |
1906 | cret = close(stream->index_fd); | |
1907 | if (cret < 0) { | |
1908 | PERROR("close stream index_fd"); | |
1909 | } | |
173af62f DG |
1910 | iter.iter.node = &stream->stream_n.node; |
1911 | ret = lttng_ht_del(streams_ht, &iter); | |
1912 | assert(!ret); | |
1913 | call_rcu(&stream->rcu_node, | |
1914 | deferred_free_stream); | |
1915 | DBG("Closed tracefile %d after recv data", stream->fd); | |
1916 | } | |
1917 | ||
1c20f0e2 | 1918 | end_rcu_unlock: |
9d1bbf21 | 1919 | rcu_read_unlock(); |
b8aa1682 JD |
1920 | end: |
1921 | return ret; | |
1922 | } | |
1923 | ||
1924 | static | |
9d1bbf21 | 1925 | void relay_cleanup_poll_connection(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
1926 | { |
1927 | int ret; | |
1928 | ||
b8aa1682 JD |
1929 | lttng_poll_del(events, pollfd); |
1930 | ||
1931 | ret = close(pollfd); | |
1932 | if (ret < 0) { | |
1933 | ERR("Closing pollfd %d", pollfd); | |
1934 | } | |
1935 | } | |
1936 | ||
1937 | static | |
1938 | int relay_add_connection(int fd, struct lttng_poll_event *events, | |
1939 | struct lttng_ht *relay_connections_ht) | |
1940 | { | |
b8aa1682 | 1941 | struct relay_command *relay_connection; |
9d1bbf21 | 1942 | int ret; |
b8aa1682 JD |
1943 | |
1944 | relay_connection = zmalloc(sizeof(struct relay_command)); | |
1945 | if (relay_connection == NULL) { | |
1946 | PERROR("Relay command zmalloc"); | |
9d1bbf21 | 1947 | goto error; |
b8aa1682 | 1948 | } |
f921c78f DG |
1949 | do { |
1950 | ret = read(fd, relay_connection, sizeof(struct relay_command)); | |
1951 | } while (ret < 0 && errno == EINTR); | |
cdf0f8fc | 1952 | if (ret < 0 || ret < sizeof(struct relay_command)) { |
b8aa1682 | 1953 | PERROR("read relay cmd pipe"); |
9d1bbf21 | 1954 | goto error_read; |
b8aa1682 JD |
1955 | } |
1956 | ||
1957 | lttng_ht_node_init_ulong(&relay_connection->sock_n, | |
1958 | (unsigned long) relay_connection->sock->fd); | |
9d1bbf21 | 1959 | rcu_read_lock(); |
b8aa1682 JD |
1960 | lttng_ht_add_unique_ulong(relay_connections_ht, |
1961 | &relay_connection->sock_n); | |
9d1bbf21 MD |
1962 | rcu_read_unlock(); |
1963 | return lttng_poll_add(events, | |
b8aa1682 JD |
1964 | relay_connection->sock->fd, |
1965 | LPOLLIN | LPOLLRDHUP); | |
1966 | ||
9d1bbf21 MD |
1967 | error_read: |
1968 | free(relay_connection); | |
1969 | error: | |
1970 | return -1; | |
1971 | } | |
1972 | ||
1973 | static | |
1974 | void deferred_free_connection(struct rcu_head *head) | |
1975 | { | |
1976 | struct relay_command *relay_connection = | |
1977 | caa_container_of(head, struct relay_command, rcu_node); | |
5b6d8097 DG |
1978 | |
1979 | lttcomm_destroy_sock(relay_connection->sock); | |
9d1bbf21 MD |
1980 | free(relay_connection); |
1981 | } | |
1982 | ||
1983 | static | |
1984 | void relay_del_connection(struct lttng_ht *relay_connections_ht, | |
1985 | struct lttng_ht *streams_ht, struct lttng_ht_iter *iter, | |
1986 | struct relay_command *relay_connection) | |
1987 | { | |
1988 | int ret; | |
1989 | ||
1990 | ret = lttng_ht_del(relay_connections_ht, iter); | |
1991 | assert(!ret); | |
1992 | if (relay_connection->type == RELAY_CONTROL) { | |
1993 | relay_delete_session(relay_connection, streams_ht); | |
1994 | } | |
5b6d8097 | 1995 | |
9d1bbf21 MD |
1996 | call_rcu(&relay_connection->rcu_node, |
1997 | deferred_free_connection); | |
b8aa1682 JD |
1998 | } |
1999 | ||
2000 | /* | |
2001 | * This thread does the actual work | |
2002 | */ | |
2003 | static | |
2004 | void *relay_thread_worker(void *data) | |
2005 | { | |
beaad64c DG |
2006 | int ret, err = -1, last_seen_data_fd = -1; |
2007 | uint32_t nb_fd; | |
b8aa1682 JD |
2008 | struct relay_command *relay_connection; |
2009 | struct lttng_poll_event events; | |
2010 | struct lttng_ht *relay_connections_ht; | |
2011 | struct lttng_ht_node_ulong *node; | |
2012 | struct lttng_ht_iter iter; | |
2013 | struct lttng_ht *streams_ht; | |
1c20f0e2 | 2014 | struct lttng_ht *index_streams_ht; |
b8aa1682 JD |
2015 | struct lttcomm_relayd_hdr recv_hdr; |
2016 | ||
2017 | DBG("[thread] Relay worker started"); | |
2018 | ||
9d1bbf21 MD |
2019 | rcu_register_thread(); |
2020 | ||
b8aa1682 JD |
2021 | /* table of connections indexed on socket */ |
2022 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2023 | if (!relay_connections_ht) { |
2024 | goto relay_connections_ht_error; | |
2025 | } | |
b8aa1682 JD |
2026 | |
2027 | /* tables of streams indexed by stream ID */ | |
2028 | streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2029 | if (!streams_ht) { |
2030 | goto streams_ht_error; | |
2031 | } | |
b8aa1682 | 2032 | |
1c20f0e2 JD |
2033 | /* Tables of received indexes indexed by index handle and net_seq_num. */ |
2034 | indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64); | |
2035 | if (!indexes_ht) { | |
2036 | goto indexes_ht_error; | |
2037 | } | |
2038 | ||
b8aa1682 JD |
2039 | ret = create_thread_poll_set(&events, 2); |
2040 | if (ret < 0) { | |
2041 | goto error_poll_create; | |
2042 | } | |
2043 | ||
2044 | ret = lttng_poll_add(&events, relay_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); | |
2045 | if (ret < 0) { | |
2046 | goto error; | |
2047 | } | |
2048 | ||
beaad64c | 2049 | restart: |
b8aa1682 | 2050 | while (1) { |
beaad64c DG |
2051 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2052 | ||
b8aa1682 | 2053 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2054 | DBG3("Relayd worker thread polling..."); |
b8aa1682 JD |
2055 | ret = lttng_poll_wait(&events, -1); |
2056 | if (ret < 0) { | |
2057 | /* | |
2058 | * Restart interrupted system call. | |
2059 | */ | |
2060 | if (errno == EINTR) { | |
2061 | goto restart; | |
2062 | } | |
2063 | goto error; | |
2064 | } | |
2065 | ||
0d9c5d77 DG |
2066 | nb_fd = ret; |
2067 | ||
beaad64c DG |
2068 | /* |
2069 | * Process control. The control connection is prioritised so we don't | |
2070 | * starve it with high throughout put tracing data on the data | |
2071 | * connection. | |
2072 | */ | |
b8aa1682 JD |
2073 | for (i = 0; i < nb_fd; i++) { |
2074 | /* Fetch once the poll data */ | |
beaad64c DG |
2075 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2076 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 JD |
2077 | |
2078 | /* Thread quit pipe has been closed. Killing thread. */ | |
2079 | ret = check_thread_quit_pipe(pollfd, revents); | |
2080 | if (ret) { | |
095a4ae5 MD |
2081 | err = 0; |
2082 | goto exit; | |
b8aa1682 JD |
2083 | } |
2084 | ||
2085 | /* Inspect the relay cmd pipe for new connection */ | |
2086 | if (pollfd == relay_cmd_pipe[0]) { | |
2087 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2088 | ERR("Relay pipe error"); | |
2089 | goto error; | |
2090 | } else if (revents & LPOLLIN) { | |
2091 | DBG("Relay command received"); | |
2092 | ret = relay_add_connection(relay_cmd_pipe[0], | |
2093 | &events, relay_connections_ht); | |
2094 | if (ret < 0) { | |
2095 | goto error; | |
2096 | } | |
2097 | } | |
beaad64c | 2098 | } else if (revents) { |
9d1bbf21 | 2099 | rcu_read_lock(); |
b8aa1682 JD |
2100 | lttng_ht_lookup(relay_connections_ht, |
2101 | (void *)((unsigned long) pollfd), | |
2102 | &iter); | |
2103 | node = lttng_ht_iter_get_node_ulong(&iter); | |
2104 | if (node == NULL) { | |
2105 | DBG2("Relay sock %d not found", pollfd); | |
9d1bbf21 | 2106 | rcu_read_unlock(); |
b8aa1682 JD |
2107 | goto error; |
2108 | } | |
2109 | relay_connection = caa_container_of(node, | |
2110 | struct relay_command, sock_n); | |
2111 | ||
2112 | if (revents & (LPOLLERR)) { | |
2113 | ERR("POLL ERROR"); | |
9d1bbf21 MD |
2114 | relay_cleanup_poll_connection(&events, pollfd); |
2115 | relay_del_connection(relay_connections_ht, | |
2116 | streams_ht, &iter, | |
2117 | relay_connection); | |
beaad64c DG |
2118 | if (last_seen_data_fd == pollfd) { |
2119 | last_seen_data_fd = last_notdel_data_fd; | |
2120 | } | |
b8aa1682 JD |
2121 | } else if (revents & (LPOLLHUP | LPOLLRDHUP)) { |
2122 | DBG("Socket %d hung up", pollfd); | |
9d1bbf21 MD |
2123 | relay_cleanup_poll_connection(&events, pollfd); |
2124 | relay_del_connection(relay_connections_ht, | |
2125 | streams_ht, &iter, | |
2126 | relay_connection); | |
beaad64c DG |
2127 | if (last_seen_data_fd == pollfd) { |
2128 | last_seen_data_fd = last_notdel_data_fd; | |
2129 | } | |
b8aa1682 JD |
2130 | } else if (revents & LPOLLIN) { |
2131 | /* control socket */ | |
2132 | if (relay_connection->type == RELAY_CONTROL) { | |
2133 | ret = relay_connection->sock->ops->recvmsg( | |
2134 | relay_connection->sock, &recv_hdr, | |
7c5aef62 | 2135 | sizeof(struct lttcomm_relayd_hdr), 0); |
b8aa1682 JD |
2136 | /* connection closed */ |
2137 | if (ret <= 0) { | |
9d1bbf21 MD |
2138 | relay_cleanup_poll_connection(&events, pollfd); |
2139 | relay_del_connection(relay_connections_ht, | |
2140 | streams_ht, &iter, | |
2141 | relay_connection); | |
b8aa1682 JD |
2142 | DBG("Control connection closed with %d", pollfd); |
2143 | } else { | |
2144 | if (relay_connection->session) { | |
77c7c900 | 2145 | DBG2("Relay worker receiving data for session : %" PRIu64, |
b8aa1682 JD |
2146 | relay_connection->session->id); |
2147 | } | |
2148 | ret = relay_process_control(&recv_hdr, | |
2149 | relay_connection, | |
1c20f0e2 JD |
2150 | streams_ht, |
2151 | index_streams_ht, | |
2152 | indexes_ht); | |
b8aa1682 | 2153 | if (ret < 0) { |
beaad64c | 2154 | /* Clear the session on error. */ |
9d1bbf21 MD |
2155 | relay_cleanup_poll_connection(&events, pollfd); |
2156 | relay_del_connection(relay_connections_ht, | |
2157 | streams_ht, &iter, | |
2158 | relay_connection); | |
b8aa1682 JD |
2159 | DBG("Connection closed with %d", pollfd); |
2160 | } | |
beaad64c | 2161 | seen_control = 1; |
b8aa1682 | 2162 | } |
beaad64c DG |
2163 | } else { |
2164 | /* | |
2165 | * Flag the last seen data fd not deleted. It will be | |
2166 | * used as the last seen fd if any fd gets deleted in | |
2167 | * this first loop. | |
2168 | */ | |
2169 | last_notdel_data_fd = pollfd; | |
2170 | } | |
2171 | } | |
2172 | rcu_read_unlock(); | |
2173 | } | |
2174 | } | |
2175 | ||
2176 | /* | |
2177 | * The last loop handled a control request, go back to poll to make | |
2178 | * sure we prioritise the control socket. | |
2179 | */ | |
2180 | if (seen_control) { | |
2181 | continue; | |
2182 | } | |
2183 | ||
2184 | if (last_seen_data_fd >= 0) { | |
2185 | for (i = 0; i < nb_fd; i++) { | |
2186 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2187 | if (last_seen_data_fd == pollfd) { | |
2188 | idx = i; | |
2189 | break; | |
2190 | } | |
2191 | } | |
2192 | } | |
2193 | ||
2194 | /* Process data connection. */ | |
2195 | for (i = idx + 1; i < nb_fd; i++) { | |
2196 | /* Fetch the poll data. */ | |
2197 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2198 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2199 | ||
2200 | /* Skip the command pipe. It's handled in the first loop. */ | |
2201 | if (pollfd == relay_cmd_pipe[0]) { | |
2202 | continue; | |
2203 | } | |
2204 | ||
2205 | if (revents) { | |
2206 | rcu_read_lock(); | |
2207 | lttng_ht_lookup(relay_connections_ht, | |
2208 | (void *)((unsigned long) pollfd), | |
2209 | &iter); | |
2210 | node = lttng_ht_iter_get_node_ulong(&iter); | |
2211 | if (node == NULL) { | |
2212 | /* Skip it. Might be removed before. */ | |
2213 | rcu_read_unlock(); | |
2214 | continue; | |
2215 | } | |
2216 | relay_connection = caa_container_of(node, | |
2217 | struct relay_command, sock_n); | |
2218 | ||
2219 | if (revents & LPOLLIN) { | |
2220 | if (relay_connection->type != RELAY_DATA) { | |
2221 | continue; | |
2222 | } | |
2223 | ||
1c20f0e2 JD |
2224 | ret = relay_process_data(relay_connection, streams_ht, |
2225 | indexes_ht); | |
beaad64c DG |
2226 | /* connection closed */ |
2227 | if (ret < 0) { | |
2228 | relay_cleanup_poll_connection(&events, pollfd); | |
2229 | relay_del_connection(relay_connections_ht, | |
2230 | streams_ht, &iter, | |
2231 | relay_connection); | |
2232 | DBG("Data connection closed with %d", pollfd); | |
2233 | /* | |
2234 | * Every goto restart call sets the last seen fd where | |
2235 | * here we don't really care since we gracefully | |
2236 | * continue the loop after the connection is deleted. | |
2237 | */ | |
2238 | } else { | |
2239 | /* Keep last seen port. */ | |
2240 | last_seen_data_fd = pollfd; | |
2241 | rcu_read_unlock(); | |
2242 | goto restart; | |
b8aa1682 JD |
2243 | } |
2244 | } | |
9d1bbf21 | 2245 | rcu_read_unlock(); |
b8aa1682 JD |
2246 | } |
2247 | } | |
beaad64c | 2248 | last_seen_data_fd = -1; |
b8aa1682 JD |
2249 | } |
2250 | ||
095a4ae5 | 2251 | exit: |
b8aa1682 JD |
2252 | error: |
2253 | lttng_poll_clean(&events); | |
2254 | ||
2255 | /* empty the hash table and free the memory */ | |
9d1bbf21 | 2256 | rcu_read_lock(); |
b8aa1682 JD |
2257 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, node, node) { |
2258 | node = lttng_ht_iter_get_node_ulong(&iter); | |
2259 | if (node) { | |
2260 | relay_connection = caa_container_of(node, | |
2261 | struct relay_command, sock_n); | |
9d1bbf21 MD |
2262 | relay_del_connection(relay_connections_ht, |
2263 | streams_ht, &iter, | |
2264 | relay_connection); | |
b8aa1682 | 2265 | } |
b8aa1682 | 2266 | } |
9d1bbf21 | 2267 | rcu_read_unlock(); |
b8aa1682 | 2268 | error_poll_create: |
1c20f0e2 JD |
2269 | lttng_ht_destroy(indexes_ht); |
2270 | indexes_ht_error: | |
095a4ae5 MD |
2271 | lttng_ht_destroy(streams_ht); |
2272 | streams_ht_error: | |
b8aa1682 | 2273 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 2274 | relay_connections_ht_error: |
6620da75 DG |
2275 | /* Close relay cmd pipes */ |
2276 | utils_close_pipe(relay_cmd_pipe); | |
095a4ae5 MD |
2277 | if (err) { |
2278 | DBG("Thread exited with error"); | |
2279 | } | |
b8aa1682 | 2280 | DBG("Worker thread cleanup complete"); |
095a4ae5 | 2281 | free(data_buffer); |
b8aa1682 | 2282 | stop_threads(); |
9d1bbf21 | 2283 | rcu_unregister_thread(); |
b8aa1682 JD |
2284 | return NULL; |
2285 | } | |
2286 | ||
2287 | /* | |
2288 | * Create the relay command pipe to wake thread_manage_apps. | |
2289 | * Closed in cleanup(). | |
2290 | */ | |
2291 | static int create_relay_cmd_pipe(void) | |
2292 | { | |
a02de639 | 2293 | int ret; |
b8aa1682 | 2294 | |
a02de639 | 2295 | ret = utils_create_pipe_cloexec(relay_cmd_pipe); |
b8aa1682 | 2296 | |
b8aa1682 JD |
2297 | return ret; |
2298 | } | |
2299 | ||
2300 | /* | |
2301 | * main | |
2302 | */ | |
2303 | int main(int argc, char **argv) | |
2304 | { | |
2305 | int ret = 0; | |
2306 | void *status; | |
2307 | ||
2308 | /* Create thread quit pipe */ | |
2309 | if ((ret = init_thread_quit_pipe()) < 0) { | |
2310 | goto error; | |
2311 | } | |
2312 | ||
2313 | /* Parse arguments */ | |
2314 | progname = argv[0]; | |
c617c0c6 | 2315 | if ((ret = parse_args(argc, argv)) < 0) { |
a02de639 | 2316 | goto exit; |
b8aa1682 JD |
2317 | } |
2318 | ||
2319 | if ((ret = set_signal_handler()) < 0) { | |
2320 | goto exit; | |
2321 | } | |
2322 | ||
4d513a50 DG |
2323 | /* Try to create directory if -o, --output is specified. */ |
2324 | if (opt_output_path) { | |
994fa64f DG |
2325 | if (*opt_output_path != '/') { |
2326 | ERR("Please specify an absolute path for -o, --output PATH"); | |
2327 | goto exit; | |
2328 | } | |
2329 | ||
4d513a50 DG |
2330 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG); |
2331 | if (ret < 0) { | |
2332 | ERR("Unable to create %s", opt_output_path); | |
2333 | goto exit; | |
2334 | } | |
2335 | } | |
2336 | ||
b8aa1682 JD |
2337 | /* Daemonize */ |
2338 | if (opt_daemon) { | |
2339 | ret = daemon(0, 0); | |
2340 | if (ret < 0) { | |
2341 | PERROR("daemon"); | |
a02de639 | 2342 | goto exit; |
b8aa1682 JD |
2343 | } |
2344 | } | |
2345 | ||
1c20f0e2 JD |
2346 | /* We need those values for the file/dir creation. */ |
2347 | relayd_uid = getuid(); | |
2348 | relayd_gid = getgid(); | |
b8aa1682 | 2349 | |
1c20f0e2 JD |
2350 | /* Check if daemon is UID = 0 */ |
2351 | if (relayd_uid == 0) { | |
b8aa1682 JD |
2352 | if (control_uri->port < 1024 || data_uri->port < 1024) { |
2353 | ERR("Need to be root to use ports < 1024"); | |
2354 | ret = -1; | |
a02de639 | 2355 | goto exit; |
b8aa1682 JD |
2356 | } |
2357 | } | |
2358 | ||
2359 | /* Setup the thread apps communication pipe. */ | |
2360 | if ((ret = create_relay_cmd_pipe()) < 0) { | |
2361 | goto exit; | |
2362 | } | |
2363 | ||
2364 | /* Init relay command queue. */ | |
2365 | cds_wfq_init(&relay_cmd_queue.queue); | |
2366 | ||
2367 | /* Set up max poll set size */ | |
2368 | lttng_poll_set_max_size(); | |
2369 | ||
554831e7 MD |
2370 | /* Initialize communication library */ |
2371 | lttcomm_init(); | |
2372 | ||
b8aa1682 JD |
2373 | /* Setup the dispatcher thread */ |
2374 | ret = pthread_create(&dispatcher_thread, NULL, | |
2375 | relay_thread_dispatcher, (void *) NULL); | |
2376 | if (ret != 0) { | |
2377 | PERROR("pthread_create dispatcher"); | |
2378 | goto exit_dispatcher; | |
2379 | } | |
2380 | ||
2381 | /* Setup the worker thread */ | |
2382 | ret = pthread_create(&worker_thread, NULL, | |
2383 | relay_thread_worker, (void *) NULL); | |
2384 | if (ret != 0) { | |
2385 | PERROR("pthread_create worker"); | |
2386 | goto exit_worker; | |
2387 | } | |
2388 | ||
2389 | /* Setup the listener thread */ | |
2390 | ret = pthread_create(&listener_thread, NULL, | |
2391 | relay_thread_listener, (void *) NULL); | |
2392 | if (ret != 0) { | |
2393 | PERROR("pthread_create listener"); | |
2394 | goto exit_listener; | |
2395 | } | |
2396 | ||
2397 | exit_listener: | |
2398 | ret = pthread_join(listener_thread, &status); | |
2399 | if (ret != 0) { | |
2400 | PERROR("pthread_join"); | |
2401 | goto error; /* join error, exit without cleanup */ | |
2402 | } | |
2403 | ||
2404 | exit_worker: | |
2405 | ret = pthread_join(worker_thread, &status); | |
2406 | if (ret != 0) { | |
2407 | PERROR("pthread_join"); | |
2408 | goto error; /* join error, exit without cleanup */ | |
2409 | } | |
2410 | ||
2411 | exit_dispatcher: | |
2412 | ret = pthread_join(dispatcher_thread, &status); | |
2413 | if (ret != 0) { | |
2414 | PERROR("pthread_join"); | |
2415 | goto error; /* join error, exit without cleanup */ | |
2416 | } | |
2417 | ||
2418 | exit: | |
2419 | cleanup(); | |
2420 | if (!ret) { | |
2421 | exit(EXIT_SUCCESS); | |
2422 | } | |
a02de639 | 2423 | |
b8aa1682 JD |
2424 | error: |
2425 | exit(EXIT_FAILURE); | |
2426 | } |