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