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> | |
02a6bb53 | 47 | #include <common/daemonize.h> |
b8aa1682 JD |
48 | #include <common/futex.h> |
49 | #include <common/sessiond-comm/sessiond-comm.h> | |
50 | #include <common/sessiond-comm/inet.h> | |
b8aa1682 JD |
51 | #include <common/sessiond-comm/relayd.h> |
52 | #include <common/uri.h> | |
a02de639 | 53 | #include <common/utils.h> |
b8aa1682 | 54 | |
0f907de1 | 55 | #include "cmd.h" |
d3e2ba59 | 56 | #include "ctf-trace.h" |
1c20f0e2 | 57 | #include "index.h" |
0f907de1 | 58 | #include "utils.h" |
b8aa1682 | 59 | #include "lttng-relayd.h" |
d3e2ba59 | 60 | #include "live.h" |
55706a7d | 61 | #include "health-relayd.h" |
4e5b8b82 | 62 | #include "testpoint.h" |
991adae2 | 63 | #include "viewer-stream.h" |
eb702af5 DG |
64 | #include "session.h" |
65 | #include "stream.h" | |
b8aa1682 JD |
66 | |
67 | /* command line options */ | |
0f907de1 | 68 | char *opt_output_path; |
d1a3048a | 69 | static int opt_daemon, opt_background; |
02a6bb53 MD |
70 | |
71 | /* | |
72 | * We need to wait for listener and live listener threads, as well as | |
73 | * health check thread, before being ready to signal readiness. | |
74 | */ | |
75 | #define NR_LTTNG_RELAY_READY 3 | |
76 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
77 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ | |
78 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
79 | ||
095a4ae5 MD |
80 | static struct lttng_uri *control_uri; |
81 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 82 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
83 | |
84 | const char *progname; | |
b8aa1682 | 85 | |
65931c8b MD |
86 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
87 | ||
b8aa1682 JD |
88 | /* |
89 | * Quit pipe for all threads. This permits a single cancellation point | |
90 | * for all threads when receiving an event on the pipe. | |
91 | */ | |
3557d456 | 92 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
93 | |
94 | /* | |
95 | * This pipe is used to inform the worker thread that a command is queued and | |
96 | * ready to be processed. | |
97 | */ | |
98 | static int relay_cmd_pipe[2] = { -1, -1 }; | |
99 | ||
26c9d55e | 100 | /* Shared between threads */ |
b8aa1682 JD |
101 | static int dispatch_thread_exit; |
102 | ||
103 | static pthread_t listener_thread; | |
104 | static pthread_t dispatcher_thread; | |
105 | static pthread_t worker_thread; | |
65931c8b | 106 | static pthread_t health_thread; |
b8aa1682 | 107 | |
095a4ae5 | 108 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
109 | |
110 | /* | |
111 | * Relay command queue. | |
112 | * | |
113 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
114 | * queue. | |
115 | */ | |
116 | static struct relay_cmd_queue relay_cmd_queue; | |
117 | ||
118 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
119 | static char *data_buffer; |
120 | static unsigned int data_buffer_size; | |
b8aa1682 | 121 | |
1c20f0e2 JD |
122 | /* We need those values for the file/dir creation. */ |
123 | static uid_t relayd_uid; | |
124 | static gid_t relayd_gid; | |
125 | ||
d3e2ba59 JD |
126 | /* Global relay stream hash table. */ |
127 | struct lttng_ht *relay_streams_ht; | |
128 | ||
92c6ca54 DG |
129 | /* Global relay viewer stream hash table. */ |
130 | struct lttng_ht *viewer_streams_ht; | |
131 | ||
0a6518b0 DG |
132 | /* Global hash table that stores relay index object. */ |
133 | struct lttng_ht *indexes_ht; | |
134 | ||
55706a7d | 135 | /* Relayd health monitoring */ |
eea7556c | 136 | struct health_app *health_relayd; |
55706a7d | 137 | |
b8aa1682 JD |
138 | /* |
139 | * usage function on stderr | |
140 | */ | |
141 | static | |
142 | void usage(void) | |
143 | { | |
144 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); | |
994fa64f DG |
145 | fprintf(stderr, " -h, --help Display this usage.\n"); |
146 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
d1a3048a | 147 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
994fa64f DG |
148 | fprintf(stderr, " -C, --control-port URL Control port listening.\n"); |
149 | fprintf(stderr, " -D, --data-port URL Data port listening.\n"); | |
a6a062a4 | 150 | fprintf(stderr, " -L, --live-port URL Live view port listening.\n"); |
994fa64f DG |
151 | fprintf(stderr, " -o, --output PATH Output path for traces. Must use an absolute path.\n"); |
152 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
65931c8b | 153 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
b8aa1682 JD |
154 | } |
155 | ||
156 | static | |
157 | int parse_args(int argc, char **argv) | |
158 | { | |
159 | int c; | |
160 | int ret = 0; | |
161 | char *default_address; | |
162 | ||
163 | static struct option long_options[] = { | |
e3678fd8 MD |
164 | { "control-port", 1, 0, 'C', }, |
165 | { "data-port", 1, 0, 'D', }, | |
166 | { "daemonize", 0, 0, 'd', }, | |
65931c8b | 167 | { "group", 1, 0, 'g', }, |
e3678fd8 MD |
168 | { "help", 0, 0, 'h', }, |
169 | { "output", 1, 0, 'o', }, | |
170 | { "verbose", 0, 0, 'v', }, | |
06b55dbb | 171 | { "background", 0, 0, 'b' }, |
095a4ae5 | 172 | { NULL, 0, 0, 0, }, |
b8aa1682 JD |
173 | }; |
174 | ||
175 | while (1) { | |
176 | int option_index = 0; | |
06b55dbb | 177 | c = getopt_long(argc, argv, "dhv" "C:D:L:o:g:b", |
b8aa1682 JD |
178 | long_options, &option_index); |
179 | if (c == -1) { | |
180 | break; | |
181 | } | |
182 | ||
183 | switch (c) { | |
184 | case 0: | |
185 | fprintf(stderr, "option %s", long_options[option_index].name); | |
186 | if (optarg) { | |
187 | fprintf(stderr, " with arg %s\n", optarg); | |
188 | } | |
189 | break; | |
190 | case 'C': | |
191 | ret = uri_parse(optarg, &control_uri); | |
192 | if (ret < 0) { | |
193 | ERR("Invalid control URI specified"); | |
194 | goto exit; | |
195 | } | |
196 | if (control_uri->port == 0) { | |
197 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
198 | } | |
199 | break; | |
200 | case 'D': | |
201 | ret = uri_parse(optarg, &data_uri); | |
202 | if (ret < 0) { | |
203 | ERR("Invalid data URI specified"); | |
204 | goto exit; | |
205 | } | |
206 | if (data_uri->port == 0) { | |
207 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
208 | } | |
209 | break; | |
a6a062a4 AM |
210 | case 'L': |
211 | ret = uri_parse(optarg, &live_uri); | |
212 | if (ret < 0) { | |
213 | ERR("Invalid live URI specified"); | |
214 | goto exit; | |
215 | } | |
216 | if (live_uri->port == 0) { | |
217 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
218 | } | |
219 | break; | |
b8aa1682 JD |
220 | case 'd': |
221 | opt_daemon = 1; | |
222 | break; | |
06b55dbb DG |
223 | case 'b': |
224 | opt_background = 1; | |
225 | break; | |
65931c8b MD |
226 | case 'g': |
227 | tracing_group_name = optarg; | |
228 | break; | |
b8aa1682 JD |
229 | case 'h': |
230 | usage(); | |
231 | exit(EXIT_FAILURE); | |
232 | case 'o': | |
233 | ret = asprintf(&opt_output_path, "%s", optarg); | |
234 | if (ret < 0) { | |
235 | PERROR("asprintf opt_output_path"); | |
236 | goto exit; | |
237 | } | |
238 | break; | |
239 | case 'v': | |
240 | /* Verbose level can increase using multiple -v */ | |
241 | lttng_opt_verbose += 1; | |
242 | break; | |
243 | default: | |
244 | /* Unknown option or other error. | |
245 | * Error is printed by getopt, just return */ | |
246 | ret = -1; | |
247 | goto exit; | |
248 | } | |
249 | } | |
250 | ||
251 | /* assign default values */ | |
252 | if (control_uri == NULL) { | |
253 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
254 | DEFAULT_NETWORK_CONTROL_PORT); | |
255 | if (ret < 0) { | |
256 | PERROR("asprintf default data address"); | |
257 | goto exit; | |
258 | } | |
259 | ||
260 | ret = uri_parse(default_address, &control_uri); | |
261 | free(default_address); | |
262 | if (ret < 0) { | |
263 | ERR("Invalid control URI specified"); | |
264 | goto exit; | |
265 | } | |
266 | } | |
267 | if (data_uri == NULL) { | |
268 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
269 | DEFAULT_NETWORK_DATA_PORT); | |
270 | if (ret < 0) { | |
271 | PERROR("asprintf default data address"); | |
272 | goto exit; | |
273 | } | |
274 | ||
275 | ret = uri_parse(default_address, &data_uri); | |
276 | free(default_address); | |
277 | if (ret < 0) { | |
278 | ERR("Invalid data URI specified"); | |
279 | goto exit; | |
280 | } | |
281 | } | |
d3e2ba59 JD |
282 | if (live_uri == NULL) { |
283 | ret = asprintf(&default_address, "tcp://0.0.0.0:%d", | |
284 | DEFAULT_NETWORK_VIEWER_PORT); | |
285 | if (ret < 0) { | |
286 | PERROR("asprintf default viewer control address"); | |
287 | goto exit; | |
288 | } | |
289 | ||
290 | ret = uri_parse(default_address, &live_uri); | |
291 | free(default_address); | |
292 | if (ret < 0) { | |
293 | ERR("Invalid viewer control URI specified"); | |
294 | goto exit; | |
295 | } | |
296 | } | |
b8aa1682 JD |
297 | |
298 | exit: | |
299 | return ret; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Cleanup the daemon | |
304 | */ | |
305 | static | |
306 | void cleanup(void) | |
307 | { | |
b8aa1682 JD |
308 | DBG("Cleaning up"); |
309 | ||
095a4ae5 MD |
310 | /* free the dynamically allocated opt_output_path */ |
311 | free(opt_output_path); | |
312 | ||
a02de639 CB |
313 | /* Close thread quit pipes */ |
314 | utils_close_pipe(thread_quit_pipe); | |
315 | ||
710c1f73 DG |
316 | uri_free(control_uri); |
317 | uri_free(data_uri); | |
a6a062a4 | 318 | /* Live URI is freed in the live thread. */ |
b8aa1682 JD |
319 | } |
320 | ||
321 | /* | |
322 | * Write to writable pipe used to notify a thread. | |
323 | */ | |
324 | static | |
325 | int notify_thread_pipe(int wpipe) | |
326 | { | |
6cd525e8 | 327 | ssize_t ret; |
b8aa1682 | 328 | |
6cd525e8 MD |
329 | ret = lttng_write(wpipe, "!", 1); |
330 | if (ret < 1) { | |
b8aa1682 JD |
331 | PERROR("write poll pipe"); |
332 | } | |
333 | ||
334 | return ret; | |
335 | } | |
336 | ||
65931c8b MD |
337 | static void notify_health_quit_pipe(int *pipe) |
338 | { | |
6cd525e8 | 339 | ssize_t ret; |
65931c8b | 340 | |
6cd525e8 MD |
341 | ret = lttng_write(pipe[1], "4", 1); |
342 | if (ret < 1) { | |
65931c8b MD |
343 | PERROR("write relay health quit"); |
344 | } | |
345 | } | |
346 | ||
b8aa1682 JD |
347 | /* |
348 | * Stop all threads by closing the thread quit pipe. | |
349 | */ | |
350 | static | |
351 | void stop_threads(void) | |
352 | { | |
353 | int ret; | |
354 | ||
355 | /* Stopping all threads */ | |
356 | DBG("Terminating all threads"); | |
357 | ret = notify_thread_pipe(thread_quit_pipe[1]); | |
358 | if (ret < 0) { | |
359 | ERR("write error on thread quit pipe"); | |
360 | } | |
361 | ||
65931c8b MD |
362 | notify_health_quit_pipe(health_quit_pipe); |
363 | ||
b8aa1682 | 364 | /* Dispatch thread */ |
26c9d55e | 365 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
b8aa1682 JD |
366 | futex_nto1_wake(&relay_cmd_queue.futex); |
367 | } | |
368 | ||
369 | /* | |
370 | * Signal handler for the daemon | |
371 | * | |
372 | * Simply stop all worker threads, leaving main() return gracefully after | |
373 | * joining all threads and calling cleanup(). | |
374 | */ | |
375 | static | |
376 | void sighandler(int sig) | |
377 | { | |
378 | switch (sig) { | |
379 | case SIGPIPE: | |
380 | DBG("SIGPIPE caught"); | |
381 | return; | |
382 | case SIGINT: | |
383 | DBG("SIGINT caught"); | |
384 | stop_threads(); | |
385 | break; | |
386 | case SIGTERM: | |
387 | DBG("SIGTERM caught"); | |
388 | stop_threads(); | |
389 | break; | |
02a6bb53 MD |
390 | case SIGUSR1: |
391 | CMM_STORE_SHARED(recv_child_signal, 1); | |
392 | break; | |
b8aa1682 JD |
393 | default: |
394 | break; | |
395 | } | |
396 | } | |
397 | ||
398 | /* | |
399 | * Setup signal handler for : | |
400 | * SIGINT, SIGTERM, SIGPIPE | |
401 | */ | |
402 | static | |
403 | int set_signal_handler(void) | |
404 | { | |
405 | int ret = 0; | |
406 | struct sigaction sa; | |
407 | sigset_t sigset; | |
408 | ||
409 | if ((ret = sigemptyset(&sigset)) < 0) { | |
410 | PERROR("sigemptyset"); | |
411 | return ret; | |
412 | } | |
413 | ||
414 | sa.sa_handler = sighandler; | |
415 | sa.sa_mask = sigset; | |
416 | sa.sa_flags = 0; | |
417 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
418 | PERROR("sigaction"); | |
419 | return ret; | |
420 | } | |
421 | ||
422 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
423 | PERROR("sigaction"); | |
424 | return ret; | |
425 | } | |
426 | ||
427 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
428 | PERROR("sigaction"); | |
429 | return ret; | |
430 | } | |
431 | ||
02a6bb53 MD |
432 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
433 | PERROR("sigaction"); | |
434 | return ret; | |
435 | } | |
436 | ||
437 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
438 | |
439 | return ret; | |
440 | } | |
441 | ||
02a6bb53 MD |
442 | void lttng_relay_notify_ready(void) |
443 | { | |
444 | /* Notify the parent of the fork() process that we are ready. */ | |
445 | if (opt_daemon || opt_background) { | |
446 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
447 | kill(child_ppid, SIGUSR1); | |
448 | } | |
449 | } | |
450 | } | |
451 | ||
b8aa1682 JD |
452 | /* |
453 | * Init thread quit pipe. | |
454 | * | |
455 | * Return -1 on error or 0 if all pipes are created. | |
456 | */ | |
457 | static | |
458 | int init_thread_quit_pipe(void) | |
459 | { | |
a02de639 | 460 | int ret; |
b8aa1682 | 461 | |
a02de639 | 462 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 463 | |
b8aa1682 JD |
464 | return ret; |
465 | } | |
466 | ||
467 | /* | |
468 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
469 | */ | |
470 | static | |
471 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
472 | { | |
473 | int ret; | |
474 | ||
475 | if (events == NULL || size == 0) { | |
476 | ret = -1; | |
477 | goto error; | |
478 | } | |
479 | ||
480 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
481 | if (ret < 0) { | |
482 | goto error; | |
483 | } | |
484 | ||
485 | /* Add quit pipe */ | |
532ed517 | 486 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
487 | if (ret < 0) { |
488 | goto error; | |
489 | } | |
490 | ||
491 | return 0; | |
492 | ||
493 | error: | |
494 | return ret; | |
495 | } | |
496 | ||
497 | /* | |
498 | * Check if the thread quit pipe was triggered. | |
499 | * | |
500 | * Return 1 if it was triggered else 0; | |
501 | */ | |
502 | static | |
503 | int check_thread_quit_pipe(int fd, uint32_t events) | |
504 | { | |
505 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
506 | return 1; | |
507 | } | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | /* | |
513 | * Create and init socket from uri. | |
514 | */ | |
515 | static | |
516 | struct lttcomm_sock *relay_init_sock(struct lttng_uri *uri) | |
517 | { | |
518 | int ret; | |
519 | struct lttcomm_sock *sock = NULL; | |
520 | ||
521 | sock = lttcomm_alloc_sock_from_uri(uri); | |
522 | if (sock == NULL) { | |
523 | ERR("Allocating socket"); | |
524 | goto error; | |
525 | } | |
526 | ||
527 | ret = lttcomm_create_sock(sock); | |
528 | if (ret < 0) { | |
529 | goto error; | |
530 | } | |
531 | DBG("Listening on sock %d", sock->fd); | |
532 | ||
533 | ret = sock->ops->bind(sock); | |
534 | if (ret < 0) { | |
535 | goto error; | |
536 | } | |
537 | ||
538 | ret = sock->ops->listen(sock, -1); | |
539 | if (ret < 0) { | |
540 | goto error; | |
541 | ||
542 | } | |
543 | ||
544 | return sock; | |
545 | ||
546 | error: | |
547 | if (sock) { | |
548 | lttcomm_destroy_sock(sock); | |
549 | } | |
550 | return NULL; | |
551 | } | |
552 | ||
173af62f DG |
553 | /* |
554 | * Return nonzero if stream needs to be closed. | |
555 | */ | |
556 | static | |
557 | int close_stream_check(struct relay_stream *stream) | |
558 | { | |
173af62f | 559 | if (stream->close_flag && stream->prev_seq == stream->last_net_seq_num) { |
f7079f67 DG |
560 | /* |
561 | * We are about to close the stream so set the data pending flag to 1 | |
562 | * which will make the end data pending command skip the stream which | |
563 | * is now closed and ready. Note that after proceeding to a file close, | |
564 | * the written file is ready for reading. | |
565 | */ | |
566 | stream->data_pending_check_done = 1; | |
173af62f DG |
567 | return 1; |
568 | } | |
569 | return 0; | |
570 | } | |
571 | ||
eb702af5 DG |
572 | static void try_close_stream(struct relay_session *session, |
573 | struct relay_stream *stream) | |
574 | { | |
575 | int ret; | |
576 | struct ctf_trace *ctf_trace; | |
577 | ||
578 | assert(session); | |
579 | assert(stream); | |
580 | ||
581 | if (!close_stream_check(stream)) { | |
582 | /* Can't close it, not ready for that. */ | |
583 | goto end; | |
584 | } | |
585 | ||
586 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
587 | stream->path_name); | |
588 | assert(ctf_trace); | |
589 | ||
590 | pthread_mutex_lock(&session->viewer_ready_lock); | |
591 | ctf_trace->invalid_flag = 1; | |
592 | pthread_mutex_unlock(&session->viewer_ready_lock); | |
593 | ||
594 | ret = stream_close(session, stream); | |
595 | if (!ret) { | |
596 | /* Already close thus the ctf trace is being or has been destroyed. */ | |
597 | goto end; | |
598 | } | |
599 | ||
600 | ctf_trace_try_destroy(session, ctf_trace); | |
601 | ||
602 | end: | |
603 | return; | |
604 | } | |
605 | ||
b8aa1682 JD |
606 | /* |
607 | * This thread manages the listening for new connections on the network | |
608 | */ | |
609 | static | |
610 | void *relay_thread_listener(void *data) | |
611 | { | |
095a4ae5 | 612 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
613 | int val = 1; |
614 | uint32_t revents, nb_fd; | |
615 | struct lttng_poll_event events; | |
616 | struct lttcomm_sock *control_sock, *data_sock; | |
617 | ||
b8aa1682 JD |
618 | DBG("[thread] Relay listener started"); |
619 | ||
55706a7d MD |
620 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
621 | ||
f385ae0a MD |
622 | health_code_update(); |
623 | ||
b8aa1682 JD |
624 | control_sock = relay_init_sock(control_uri); |
625 | if (!control_sock) { | |
095a4ae5 | 626 | goto error_sock_control; |
b8aa1682 JD |
627 | } |
628 | ||
629 | data_sock = relay_init_sock(data_uri); | |
630 | if (!data_sock) { | |
095a4ae5 | 631 | goto error_sock_relay; |
b8aa1682 JD |
632 | } |
633 | ||
634 | /* | |
635 | * Pass 3 as size here for the thread quit pipe, control and data socket. | |
636 | */ | |
637 | ret = create_thread_poll_set(&events, 3); | |
638 | if (ret < 0) { | |
639 | goto error_create_poll; | |
640 | } | |
641 | ||
642 | /* Add the control socket */ | |
643 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
644 | if (ret < 0) { | |
645 | goto error_poll_add; | |
646 | } | |
647 | ||
648 | /* Add the data socket */ | |
649 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
650 | if (ret < 0) { | |
651 | goto error_poll_add; | |
652 | } | |
653 | ||
02a6bb53 MD |
654 | lttng_relay_notify_ready(); |
655 | ||
4e5b8b82 MD |
656 | if (testpoint(relayd_thread_listener)) { |
657 | goto error_testpoint; | |
658 | } | |
659 | ||
b8aa1682 | 660 | while (1) { |
f385ae0a MD |
661 | health_code_update(); |
662 | ||
b8aa1682 JD |
663 | DBG("Listener accepting connections"); |
664 | ||
b8aa1682 | 665 | restart: |
f385ae0a | 666 | health_poll_entry(); |
b8aa1682 | 667 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 668 | health_poll_exit(); |
b8aa1682 JD |
669 | if (ret < 0) { |
670 | /* | |
671 | * Restart interrupted system call. | |
672 | */ | |
673 | if (errno == EINTR) { | |
674 | goto restart; | |
675 | } | |
676 | goto error; | |
677 | } | |
678 | ||
0d9c5d77 DG |
679 | nb_fd = ret; |
680 | ||
b8aa1682 JD |
681 | DBG("Relay new connection received"); |
682 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
683 | health_code_update(); |
684 | ||
b8aa1682 JD |
685 | /* Fetch once the poll data */ |
686 | revents = LTTNG_POLL_GETEV(&events, i); | |
687 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
688 | ||
689 | /* Thread quit pipe has been closed. Killing thread. */ | |
690 | ret = check_thread_quit_pipe(pollfd, revents); | |
691 | if (ret) { | |
095a4ae5 MD |
692 | err = 0; |
693 | goto exit; | |
b8aa1682 JD |
694 | } |
695 | ||
696 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
697 | ERR("socket poll error"); | |
698 | goto error; | |
699 | } else if (revents & LPOLLIN) { | |
4b7f17b2 MD |
700 | /* |
701 | * Get allocated in this thread, | |
702 | * enqueued to a global queue, dequeued | |
703 | * and freed in the worker thread. | |
704 | */ | |
705 | struct relay_command *relay_cmd; | |
706 | struct lttcomm_sock *newsock; | |
b8aa1682 JD |
707 | |
708 | relay_cmd = zmalloc(sizeof(struct relay_command)); | |
709 | if (relay_cmd == NULL) { | |
710 | PERROR("relay command zmalloc"); | |
711 | goto error; | |
712 | } | |
713 | ||
714 | if (pollfd == data_sock->fd) { | |
715 | newsock = data_sock->ops->accept(data_sock); | |
4b7f17b2 | 716 | if (!newsock) { |
b8aa1682 | 717 | PERROR("accepting data sock"); |
4b7f17b2 | 718 | free(relay_cmd); |
b8aa1682 JD |
719 | goto error; |
720 | } | |
721 | relay_cmd->type = RELAY_DATA; | |
722 | DBG("Relay data connection accepted, socket %d", newsock->fd); | |
4b7f17b2 MD |
723 | } else { |
724 | assert(pollfd == control_sock->fd); | |
b8aa1682 | 725 | newsock = control_sock->ops->accept(control_sock); |
4b7f17b2 | 726 | if (!newsock) { |
b8aa1682 | 727 | PERROR("accepting control sock"); |
4b7f17b2 | 728 | free(relay_cmd); |
b8aa1682 JD |
729 | goto error; |
730 | } | |
731 | relay_cmd->type = RELAY_CONTROL; | |
732 | DBG("Relay control connection accepted, socket %d", newsock->fd); | |
733 | } | |
734 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, | |
735 | &val, sizeof(int)); | |
736 | if (ret < 0) { | |
737 | PERROR("setsockopt inet"); | |
4b7f17b2 MD |
738 | lttcomm_destroy_sock(newsock); |
739 | free(relay_cmd); | |
b8aa1682 JD |
740 | goto error; |
741 | } | |
742 | relay_cmd->sock = newsock; | |
743 | /* | |
744 | * Lock free enqueue the request. | |
745 | */ | |
746 | cds_wfq_enqueue(&relay_cmd_queue.queue, &relay_cmd->node); | |
747 | ||
748 | /* | |
749 | * Wake the dispatch queue futex. Implicit memory | |
750 | * barrier with the exchange in cds_wfq_enqueue. | |
751 | */ | |
752 | futex_nto1_wake(&relay_cmd_queue.futex); | |
753 | } | |
754 | } | |
755 | } | |
756 | ||
095a4ae5 | 757 | exit: |
b8aa1682 JD |
758 | error: |
759 | error_poll_add: | |
4e5b8b82 | 760 | error_testpoint: |
b8aa1682 JD |
761 | lttng_poll_clean(&events); |
762 | error_create_poll: | |
095a4ae5 MD |
763 | if (data_sock->fd >= 0) { |
764 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
765 | if (ret) { |
766 | PERROR("close"); | |
767 | } | |
b8aa1682 | 768 | } |
095a4ae5 MD |
769 | lttcomm_destroy_sock(data_sock); |
770 | error_sock_relay: | |
771 | if (control_sock->fd >= 0) { | |
772 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
773 | if (ret) { |
774 | PERROR("close"); | |
775 | } | |
b8aa1682 | 776 | } |
095a4ae5 MD |
777 | lttcomm_destroy_sock(control_sock); |
778 | error_sock_control: | |
779 | if (err) { | |
f385ae0a MD |
780 | health_error(); |
781 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 782 | } |
55706a7d | 783 | health_unregister(health_relayd); |
b8aa1682 JD |
784 | DBG("Relay listener thread cleanup complete"); |
785 | stop_threads(); | |
b8aa1682 JD |
786 | return NULL; |
787 | } | |
788 | ||
789 | /* | |
790 | * This thread manages the dispatching of the requests to worker threads | |
791 | */ | |
792 | static | |
793 | void *relay_thread_dispatcher(void *data) | |
794 | { | |
6cd525e8 MD |
795 | int err = -1; |
796 | ssize_t ret; | |
b8aa1682 JD |
797 | struct cds_wfq_node *node; |
798 | struct relay_command *relay_cmd = NULL; | |
799 | ||
800 | DBG("[thread] Relay dispatcher started"); | |
801 | ||
55706a7d MD |
802 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
803 | ||
4e5b8b82 MD |
804 | if (testpoint(relayd_thread_dispatcher)) { |
805 | goto error_testpoint; | |
806 | } | |
807 | ||
f385ae0a MD |
808 | health_code_update(); |
809 | ||
26c9d55e | 810 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
f385ae0a MD |
811 | health_code_update(); |
812 | ||
b8aa1682 JD |
813 | /* Atomically prepare the queue futex */ |
814 | futex_nto1_prepare(&relay_cmd_queue.futex); | |
815 | ||
816 | do { | |
f385ae0a MD |
817 | health_code_update(); |
818 | ||
b8aa1682 JD |
819 | /* Dequeue commands */ |
820 | node = cds_wfq_dequeue_blocking(&relay_cmd_queue.queue); | |
821 | if (node == NULL) { | |
822 | DBG("Woken up but nothing in the relay command queue"); | |
823 | /* Continue thread execution */ | |
824 | break; | |
825 | } | |
826 | ||
827 | relay_cmd = caa_container_of(node, struct relay_command, node); | |
828 | DBG("Dispatching request waiting on sock %d", relay_cmd->sock->fd); | |
829 | ||
830 | /* | |
831 | * Inform worker thread of the new request. This | |
832 | * call is blocking so we can be assured that the data will be read | |
833 | * at some point in time or wait to the end of the world :) | |
834 | */ | |
6cd525e8 MD |
835 | ret = lttng_write(relay_cmd_pipe[1], relay_cmd, |
836 | sizeof(struct relay_command)); | |
b8aa1682 | 837 | free(relay_cmd); |
6cd525e8 | 838 | if (ret < sizeof(struct relay_command)) { |
b8aa1682 JD |
839 | PERROR("write cmd pipe"); |
840 | goto error; | |
841 | } | |
842 | } while (node != NULL); | |
843 | ||
844 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 845 | health_poll_entry(); |
b8aa1682 | 846 | futex_nto1_wait(&relay_cmd_queue.futex); |
f385ae0a | 847 | health_poll_exit(); |
b8aa1682 JD |
848 | } |
849 | ||
f385ae0a MD |
850 | /* Normal exit, no error */ |
851 | err = 0; | |
852 | ||
b8aa1682 | 853 | error: |
4e5b8b82 | 854 | error_testpoint: |
f385ae0a MD |
855 | if (err) { |
856 | health_error(); | |
857 | ERR("Health error occurred in %s", __func__); | |
858 | } | |
55706a7d | 859 | health_unregister(health_relayd); |
b8aa1682 JD |
860 | DBG("Dispatch thread dying"); |
861 | stop_threads(); | |
862 | return NULL; | |
863 | } | |
864 | ||
eb702af5 | 865 | static void try_close_streams(struct relay_session *session) |
d3e2ba59 | 866 | { |
eb702af5 | 867 | struct ctf_trace *ctf_trace; |
94d49140 JD |
868 | struct lttng_ht_iter iter; |
869 | ||
eb702af5 | 870 | assert(session); |
94d49140 | 871 | |
eb702af5 DG |
872 | pthread_mutex_lock(&session->viewer_ready_lock); |
873 | rcu_read_lock(); | |
874 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
875 | node.node) { | |
876 | struct relay_stream *stream; | |
94d49140 | 877 | |
eb702af5 DG |
878 | /* Close streams. */ |
879 | cds_list_for_each_entry(stream, &ctf_trace->stream_list, trace_list) { | |
880 | stream_close(session, stream); | |
94d49140 | 881 | } |
94d49140 | 882 | |
eb702af5 DG |
883 | ctf_trace->invalid_flag = 1; |
884 | ctf_trace_try_destroy(session, ctf_trace); | |
157df586 | 885 | } |
eb702af5 DG |
886 | rcu_read_unlock(); |
887 | pthread_mutex_unlock(&session->viewer_ready_lock); | |
94d49140 JD |
888 | } |
889 | ||
b8aa1682 | 890 | /* |
eb702af5 | 891 | * Try to destroy a session within a connection. |
b8aa1682 JD |
892 | */ |
893 | static | |
d3e2ba59 JD |
894 | void relay_delete_session(struct relay_command *cmd, |
895 | struct lttng_ht *sessions_ht) | |
b8aa1682 | 896 | { |
eb702af5 DG |
897 | assert(cmd); |
898 | assert(sessions_ht); | |
b8aa1682 | 899 | |
eb702af5 DG |
900 | /* Indicate that this session can be destroyed from now on. */ |
901 | cmd->session->close_flag = 1; | |
b8aa1682 | 902 | |
eb702af5 | 903 | try_close_streams(cmd->session); |
5b6d8097 | 904 | |
eb702af5 DG |
905 | /* |
906 | * This will try to delete and destroy the session if no viewer is attached | |
907 | * to it meaning the refcount is down to zero. | |
908 | */ | |
909 | session_try_destroy(sessions_ht, cmd->session); | |
b8aa1682 JD |
910 | } |
911 | ||
1c20f0e2 JD |
912 | /* |
913 | * Copy index data from the control port to a given index object. | |
914 | */ | |
915 | static void copy_index_control_data(struct relay_index *index, | |
916 | struct lttcomm_relayd_index *data) | |
917 | { | |
918 | assert(index); | |
919 | assert(data); | |
920 | ||
921 | /* | |
922 | * The index on disk is encoded in big endian, so we don't need to convert | |
923 | * the data received on the network. The data_offset value is NEVER | |
924 | * modified here and is updated by the data thread. | |
925 | */ | |
926 | index->index_data.packet_size = data->packet_size; | |
927 | index->index_data.content_size = data->content_size; | |
928 | index->index_data.timestamp_begin = data->timestamp_begin; | |
929 | index->index_data.timestamp_end = data->timestamp_end; | |
930 | index->index_data.events_discarded = data->events_discarded; | |
931 | index->index_data.stream_id = data->stream_id; | |
932 | } | |
933 | ||
c5b6f4f0 DG |
934 | /* |
935 | * Handle the RELAYD_CREATE_SESSION command. | |
936 | * | |
937 | * On success, send back the session id or else return a negative value. | |
938 | */ | |
939 | static | |
940 | int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 JD |
941 | struct relay_command *cmd, |
942 | struct lttng_ht *sessions_ht) | |
c5b6f4f0 DG |
943 | { |
944 | int ret = 0, send_ret; | |
945 | struct relay_session *session; | |
946 | struct lttcomm_relayd_status_session reply; | |
947 | ||
948 | assert(recv_hdr); | |
949 | assert(cmd); | |
950 | ||
951 | memset(&reply, 0, sizeof(reply)); | |
952 | ||
eb702af5 DG |
953 | session = session_create(); |
954 | if (!session) { | |
c5b6f4f0 DG |
955 | ret = -1; |
956 | goto error; | |
957 | } | |
7d2f7452 DG |
958 | session->minor = cmd->minor; |
959 | session->major = cmd->major; | |
eb702af5 | 960 | cmd->session_id = session->id; |
c5b6f4f0 DG |
961 | cmd->session = session; |
962 | ||
963 | reply.session_id = htobe64(session->id); | |
964 | ||
d3e2ba59 | 965 | switch (cmd->minor) { |
eb702af5 DG |
966 | case 1: |
967 | case 2: | |
968 | case 3: | |
969 | break; | |
970 | case 4: /* LTTng sessiond 2.4 */ | |
971 | default: | |
972 | ret = cmd_create_session_2_4(cmd, session); | |
973 | break; | |
d3e2ba59 JD |
974 | } |
975 | ||
eb702af5 | 976 | lttng_ht_add_unique_u64(sessions_ht, &session->session_n); |
c5b6f4f0 DG |
977 | DBG("Created session %" PRIu64, session->id); |
978 | ||
979 | error: | |
980 | if (ret < 0) { | |
981 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
982 | } else { | |
983 | reply.ret_code = htobe32(LTTNG_OK); | |
984 | } | |
985 | ||
986 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
987 | if (send_ret < 0) { | |
988 | ERR("Relayd sending session id"); | |
4169f5ad | 989 | ret = send_ret; |
c5b6f4f0 DG |
990 | } |
991 | ||
992 | return ret; | |
993 | } | |
994 | ||
814fcae4 JD |
995 | /* |
996 | * When we have received all the streams and the metadata for a channel, | |
997 | * we make them visible to the viewer threads. | |
998 | */ | |
999 | static | |
1000 | void set_viewer_ready_flag(struct relay_command *cmd) | |
1001 | { | |
eb702af5 | 1002 | struct relay_stream *stream, *tmp_stream; |
814fcae4 | 1003 | |
091c3237 | 1004 | pthread_mutex_lock(&cmd->session->viewer_ready_lock); |
eb702af5 DG |
1005 | cds_list_for_each_entry_safe(stream, tmp_stream, &cmd->recv_head, |
1006 | recv_list) { | |
814fcae4 | 1007 | stream->viewer_ready = 1; |
eb702af5 | 1008 | cds_list_del(&stream->recv_list); |
814fcae4 | 1009 | } |
091c3237 | 1010 | pthread_mutex_unlock(&cmd->session->viewer_ready_lock); |
814fcae4 JD |
1011 | return; |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * Add a recv handle node to the connection recv list with the given stream | |
1016 | * handle. A new node is allocated thus must be freed when the node is deleted | |
1017 | * from the list. | |
1018 | */ | |
eb702af5 | 1019 | static void queue_stream(struct relay_stream *stream, struct relay_command *cmd) |
814fcae4 | 1020 | { |
814fcae4 | 1021 | assert(cmd); |
eb702af5 | 1022 | assert(stream); |
814fcae4 | 1023 | |
eb702af5 | 1024 | cds_list_add(&stream->recv_list, &cmd->recv_head); |
814fcae4 JD |
1025 | } |
1026 | ||
b8aa1682 JD |
1027 | /* |
1028 | * relay_add_stream: allocate a new stream for a session | |
1029 | */ | |
1030 | static | |
1031 | int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1032 | struct relay_command *cmd, struct lttng_ht *sessions_ht) |
b8aa1682 | 1033 | { |
eb702af5 | 1034 | int ret, send_ret; |
b8aa1682 | 1035 | struct relay_session *session = cmd->session; |
b8aa1682 JD |
1036 | struct relay_stream *stream = NULL; |
1037 | struct lttcomm_relayd_status_stream reply; | |
eb702af5 | 1038 | struct ctf_trace *trace; |
b8aa1682 | 1039 | |
c5b6f4f0 | 1040 | if (!session || cmd->version_check_done == 0) { |
b8aa1682 JD |
1041 | ERR("Trying to add a stream before version check"); |
1042 | ret = -1; | |
1043 | goto end_no_session; | |
1044 | } | |
1045 | ||
b8aa1682 JD |
1046 | stream = zmalloc(sizeof(struct relay_stream)); |
1047 | if (stream == NULL) { | |
1048 | PERROR("relay stream zmalloc"); | |
1049 | ret = -1; | |
1050 | goto end_no_session; | |
1051 | } | |
1052 | ||
0f907de1 JD |
1053 | switch (cmd->minor) { |
1054 | case 1: /* LTTng sessiond 2.1 */ | |
1055 | ret = cmd_recv_stream_2_1(cmd, stream); | |
1056 | break; | |
1057 | case 2: /* LTTng sessiond 2.2 */ | |
1058 | default: | |
1059 | ret = cmd_recv_stream_2_2(cmd, stream); | |
1060 | break; | |
1061 | } | |
1062 | if (ret < 0) { | |
1063 | goto err_free_stream; | |
1064 | } | |
1065 | ||
9d1bbf21 | 1066 | rcu_read_lock(); |
b8aa1682 | 1067 | stream->stream_handle = ++last_relay_stream_id; |
173af62f | 1068 | stream->prev_seq = -1ULL; |
eb702af5 | 1069 | stream->session_id = session->id; |
1c20f0e2 | 1070 | stream->index_fd = -1; |
d3e2ba59 | 1071 | stream->read_index_fd = -1; |
eb702af5 | 1072 | lttng_ht_node_init_u64(&stream->node, stream->stream_handle); |
d3e2ba59 | 1073 | pthread_mutex_init(&stream->lock, NULL); |
b8aa1682 | 1074 | |
0f907de1 | 1075 | ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG); |
b8aa1682 | 1076 | if (ret < 0) { |
b8aa1682 JD |
1077 | ERR("relay creating output directory"); |
1078 | goto end; | |
1079 | } | |
1080 | ||
be96a7d1 DG |
1081 | /* |
1082 | * No need to use run_as API here because whatever we receives, the relayd | |
1083 | * uses its own credentials for the stream files. | |
1084 | */ | |
0f907de1 | 1085 | ret = utils_create_stream_file(stream->path_name, stream->channel_name, |
1c20f0e2 | 1086 | stream->tracefile_size, 0, relayd_uid, relayd_gid, NULL); |
b8aa1682 | 1087 | if (ret < 0) { |
0f907de1 | 1088 | ERR("Create output file"); |
b8aa1682 JD |
1089 | goto end; |
1090 | } | |
b8aa1682 | 1091 | stream->fd = ret; |
0f907de1 JD |
1092 | if (stream->tracefile_size) { |
1093 | DBG("Tracefile %s/%s_0 created", stream->path_name, stream->channel_name); | |
1094 | } else { | |
1095 | DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name); | |
1096 | } | |
b8aa1682 | 1097 | |
eb702af5 DG |
1098 | trace = ctf_trace_find_by_path(session->ctf_traces_ht, stream->path_name); |
1099 | if (!trace) { | |
1100 | trace = ctf_trace_create(stream->path_name); | |
1101 | if (!trace) { | |
d3e2ba59 JD |
1102 | ret = -1; |
1103 | goto end; | |
1104 | } | |
eb702af5 DG |
1105 | ctf_trace_add(session->ctf_traces_ht, trace); |
1106 | } | |
1107 | ctf_trace_get_ref(trace); | |
1108 | ||
1109 | if (!strncmp(stream->channel_name, DEFAULT_METADATA_NAME, NAME_MAX)) { | |
1110 | stream->metadata_flag = 1; | |
1111 | /* Assign quick reference to the metadata stream in the trace. */ | |
1112 | trace->metadata_stream = stream; | |
d3e2ba59 | 1113 | } |
d3e2ba59 | 1114 | |
814fcae4 | 1115 | /* |
eb702af5 DG |
1116 | * Add the stream in the recv list of the connection. Once the end stream |
1117 | * message is received, this list is emptied and streams are set with the | |
1118 | * viewer ready flag. | |
814fcae4 | 1119 | */ |
eb702af5 | 1120 | queue_stream(stream, cmd); |
814fcae4 | 1121 | |
eb702af5 DG |
1122 | /* |
1123 | * Both in the ctf_trace object and the global stream ht since the data | |
1124 | * side of the relayd does not have the concept of session. | |
1125 | */ | |
1126 | lttng_ht_add_unique_u64(relay_streams_ht, &stream->node); | |
1127 | cds_list_add_tail(&stream->trace_list, &trace->stream_list); | |
b8aa1682 | 1128 | |
87b576ec | 1129 | session->stream_count++; |
d3e2ba59 | 1130 | |
1c20f0e2 JD |
1131 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
1132 | stream->stream_handle); | |
b8aa1682 JD |
1133 | |
1134 | end: | |
5af40280 | 1135 | reply.handle = htobe64(stream->stream_handle); |
b8aa1682 JD |
1136 | /* send the session id to the client or a negative return code on error */ |
1137 | if (ret < 0) { | |
f73fabfd | 1138 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5af40280 CB |
1139 | /* stream was not properly added to the ht, so free it */ |
1140 | free(stream); | |
b8aa1682 | 1141 | } else { |
f73fabfd | 1142 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1143 | } |
5af40280 | 1144 | |
b8aa1682 JD |
1145 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, |
1146 | sizeof(struct lttcomm_relayd_status_stream), 0); | |
1147 | if (send_ret < 0) { | |
1148 | ERR("Relay sending stream id"); | |
4169f5ad | 1149 | ret = send_ret; |
b8aa1682 | 1150 | } |
9d1bbf21 | 1151 | rcu_read_unlock(); |
b8aa1682 JD |
1152 | |
1153 | end_no_session: | |
1154 | return ret; | |
0f907de1 JD |
1155 | |
1156 | err_free_stream: | |
1157 | free(stream->path_name); | |
1158 | free(stream->channel_name); | |
1159 | free(stream); | |
1160 | return ret; | |
b8aa1682 JD |
1161 | } |
1162 | ||
173af62f DG |
1163 | /* |
1164 | * relay_close_stream: close a specific stream | |
1165 | */ | |
1166 | static | |
1167 | int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
92c6ca54 | 1168 | struct relay_command *cmd) |
173af62f | 1169 | { |
94d49140 | 1170 | int ret, send_ret; |
173af62f DG |
1171 | struct relay_session *session = cmd->session; |
1172 | struct lttcomm_relayd_close_stream stream_info; | |
1173 | struct lttcomm_relayd_generic_reply reply; | |
1174 | struct relay_stream *stream; | |
173af62f DG |
1175 | |
1176 | DBG("Close stream received"); | |
1177 | ||
c5b6f4f0 | 1178 | if (!session || cmd->version_check_done == 0) { |
173af62f DG |
1179 | ERR("Trying to close a stream before version check"); |
1180 | ret = -1; | |
1181 | goto end_no_session; | |
1182 | } | |
1183 | ||
1184 | ret = cmd->sock->ops->recvmsg(cmd->sock, &stream_info, | |
7c5aef62 | 1185 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f | 1186 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
a6cd2b97 DG |
1187 | if (ret == 0) { |
1188 | /* Orderly shutdown. Not necessary to print an error. */ | |
1189 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1190 | } else { | |
1191 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
1192 | } | |
173af62f DG |
1193 | ret = -1; |
1194 | goto end_no_session; | |
1195 | } | |
1196 | ||
1197 | rcu_read_lock(); | |
eb702af5 DG |
1198 | stream = stream_find_by_id(relay_streams_ht, |
1199 | be64toh(stream_info.stream_id)); | |
173af62f DG |
1200 | if (!stream) { |
1201 | ret = -1; | |
1202 | goto end_unlock; | |
1203 | } | |
1204 | ||
8e2583a4 | 1205 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
173af62f | 1206 | stream->close_flag = 1; |
87b576ec JD |
1207 | session->stream_count--; |
1208 | assert(session->stream_count >= 0); | |
173af62f | 1209 | |
eb702af5 DG |
1210 | /* Check if we can close it or else the data will do it. */ |
1211 | try_close_stream(session, stream); | |
173af62f DG |
1212 | |
1213 | end_unlock: | |
1214 | rcu_read_unlock(); | |
1215 | ||
1216 | if (ret < 0) { | |
f73fabfd | 1217 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1218 | } else { |
f73fabfd | 1219 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f DG |
1220 | } |
1221 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1222 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1223 | if (send_ret < 0) { | |
1224 | ERR("Relay sending stream id"); | |
4169f5ad | 1225 | ret = send_ret; |
173af62f DG |
1226 | } |
1227 | ||
1228 | end_no_session: | |
1229 | return ret; | |
1230 | } | |
1231 | ||
b8aa1682 JD |
1232 | /* |
1233 | * relay_unknown_command: send -1 if received unknown command | |
1234 | */ | |
1235 | static | |
1236 | void relay_unknown_command(struct relay_command *cmd) | |
1237 | { | |
1238 | struct lttcomm_relayd_generic_reply reply; | |
1239 | int ret; | |
1240 | ||
f73fabfd | 1241 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1242 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, |
1243 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1244 | if (ret < 0) { | |
1245 | ERR("Relay sending unknown command"); | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * relay_start: send an acknowledgment to the client to tell if we are | |
1251 | * ready to receive data. We are ready if a session is established. | |
1252 | */ | |
1253 | static | |
1254 | int relay_start(struct lttcomm_relayd_hdr *recv_hdr, | |
1255 | struct relay_command *cmd) | |
1256 | { | |
f73fabfd | 1257 | int ret = htobe32(LTTNG_OK); |
b8aa1682 JD |
1258 | struct lttcomm_relayd_generic_reply reply; |
1259 | struct relay_session *session = cmd->session; | |
1260 | ||
1261 | if (!session) { | |
1262 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1263 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1264 | } |
1265 | ||
1266 | reply.ret_code = ret; | |
1267 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1268 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1269 | if (ret < 0) { | |
1270 | ERR("Relay sending start ack"); | |
1271 | } | |
1272 | ||
1273 | return ret; | |
1274 | } | |
1275 | ||
1d4dfdef DG |
1276 | /* |
1277 | * Append padding to the file pointed by the file descriptor fd. | |
1278 | */ | |
1279 | static int write_padding_to_file(int fd, uint32_t size) | |
1280 | { | |
6cd525e8 | 1281 | ssize_t ret = 0; |
1d4dfdef DG |
1282 | char *zeros; |
1283 | ||
1284 | if (size == 0) { | |
1285 | goto end; | |
1286 | } | |
1287 | ||
1288 | zeros = zmalloc(size); | |
1289 | if (zeros == NULL) { | |
1290 | PERROR("zmalloc zeros for padding"); | |
1291 | ret = -1; | |
1292 | goto end; | |
1293 | } | |
1294 | ||
6cd525e8 MD |
1295 | ret = lttng_write(fd, zeros, size); |
1296 | if (ret < size) { | |
1d4dfdef DG |
1297 | PERROR("write padding to file"); |
1298 | } | |
1299 | ||
e986c7a1 DG |
1300 | free(zeros); |
1301 | ||
1d4dfdef DG |
1302 | end: |
1303 | return ret; | |
1304 | } | |
1305 | ||
b8aa1682 JD |
1306 | /* |
1307 | * relay_recv_metadata: receive the metada for the session. | |
1308 | */ | |
1309 | static | |
1310 | int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1311 | struct relay_command *cmd) |
b8aa1682 | 1312 | { |
f73fabfd | 1313 | int ret = htobe32(LTTNG_OK); |
6cd525e8 | 1314 | ssize_t size_ret; |
b8aa1682 JD |
1315 | struct relay_session *session = cmd->session; |
1316 | struct lttcomm_relayd_metadata_payload *metadata_struct; | |
1317 | struct relay_stream *metadata_stream; | |
1318 | uint64_t data_size, payload_size; | |
eb702af5 | 1319 | struct ctf_trace *ctf_trace; |
b8aa1682 JD |
1320 | |
1321 | if (!session) { | |
1322 | ERR("Metadata sent before version check"); | |
1323 | ret = -1; | |
1324 | goto end; | |
1325 | } | |
1326 | ||
f6416125 MD |
1327 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1328 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1329 | ERR("Incorrect data size"); | |
1330 | ret = -1; | |
1331 | goto end; | |
1332 | } | |
1333 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1334 | ||
b8aa1682 | 1335 | if (data_buffer_size < data_size) { |
d7b3776f | 1336 | /* In case the realloc fails, we can free the memory */ |
c617c0c6 MD |
1337 | char *tmp_data_ptr; |
1338 | ||
1339 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1340 | if (!tmp_data_ptr) { | |
b8aa1682 | 1341 | ERR("Allocating data buffer"); |
c617c0c6 | 1342 | free(data_buffer); |
b8aa1682 JD |
1343 | ret = -1; |
1344 | goto end; | |
1345 | } | |
c617c0c6 | 1346 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1347 | data_buffer_size = data_size; |
1348 | } | |
1349 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1350 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
7c5aef62 | 1351 | ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0); |
b8aa1682 | 1352 | if (ret < 0 || ret != data_size) { |
a6cd2b97 DG |
1353 | if (ret == 0) { |
1354 | /* Orderly shutdown. Not necessary to print an error. */ | |
1355 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1356 | } else { | |
1357 | ERR("Relay didn't receive the whole metadata"); | |
1358 | } | |
b8aa1682 | 1359 | ret = -1; |
b8aa1682 JD |
1360 | goto end; |
1361 | } | |
1362 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 MD |
1363 | |
1364 | rcu_read_lock(); | |
eb702af5 | 1365 | metadata_stream = stream_find_by_id(relay_streams_ht, |
d3e2ba59 | 1366 | be64toh(metadata_struct->stream_id)); |
b8aa1682 JD |
1367 | if (!metadata_stream) { |
1368 | ret = -1; | |
9d1bbf21 | 1369 | goto end_unlock; |
b8aa1682 JD |
1370 | } |
1371 | ||
6cd525e8 MD |
1372 | size_ret = lttng_write(metadata_stream->fd, metadata_struct->payload, |
1373 | payload_size); | |
1374 | if (size_ret < payload_size) { | |
b8aa1682 JD |
1375 | ERR("Relay error writing metadata on file"); |
1376 | ret = -1; | |
9d1bbf21 | 1377 | goto end_unlock; |
b8aa1682 | 1378 | } |
1d4dfdef DG |
1379 | |
1380 | ret = write_padding_to_file(metadata_stream->fd, | |
1381 | be32toh(metadata_struct->padding_size)); | |
1382 | if (ret < 0) { | |
1383 | goto end_unlock; | |
1384 | } | |
eb702af5 DG |
1385 | |
1386 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
1387 | metadata_stream->path_name); | |
1388 | assert(ctf_trace); | |
1389 | ctf_trace->metadata_received += | |
d3e2ba59 | 1390 | payload_size + be32toh(metadata_struct->padding_size); |
1d4dfdef | 1391 | |
b8aa1682 JD |
1392 | DBG2("Relay metadata written"); |
1393 | ||
9d1bbf21 | 1394 | end_unlock: |
6e3c5836 | 1395 | rcu_read_unlock(); |
b8aa1682 JD |
1396 | end: |
1397 | return ret; | |
1398 | } | |
1399 | ||
1400 | /* | |
1401 | * relay_send_version: send relayd version number | |
1402 | */ | |
1403 | static | |
1404 | int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1405 | struct relay_command *cmd, struct lttng_ht *sessions_ht) |
b8aa1682 | 1406 | { |
7f51dcba | 1407 | int ret; |
092b6259 | 1408 | struct lttcomm_relayd_version reply, msg; |
b8aa1682 | 1409 | |
c5b6f4f0 DG |
1410 | assert(cmd); |
1411 | ||
1412 | cmd->version_check_done = 1; | |
b8aa1682 | 1413 | |
092b6259 | 1414 | /* Get version from the other side. */ |
7c5aef62 | 1415 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); |
092b6259 | 1416 | if (ret < 0 || ret != sizeof(msg)) { |
a6cd2b97 DG |
1417 | if (ret == 0) { |
1418 | /* Orderly shutdown. Not necessary to print an error. */ | |
1419 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1420 | } else { | |
1421 | ERR("Relay failed to receive the version values."); | |
1422 | } | |
092b6259 | 1423 | ret = -1; |
092b6259 DG |
1424 | goto end; |
1425 | } | |
1426 | ||
d83a952c MD |
1427 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1428 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1429 | |
1430 | /* Major versions must be the same */ | |
1431 | if (reply.major != be32toh(msg.major)) { | |
6151a90f JD |
1432 | DBG("Incompatible major versions (%u vs %u), deleting session", |
1433 | reply.major, be32toh(msg.major)); | |
d3e2ba59 | 1434 | relay_delete_session(cmd, sessions_ht); |
d4519fa3 JD |
1435 | ret = 0; |
1436 | goto end; | |
1437 | } | |
1438 | ||
0f907de1 JD |
1439 | cmd->major = reply.major; |
1440 | /* We adapt to the lowest compatible version */ | |
1441 | if (reply.minor <= be32toh(msg.minor)) { | |
1442 | cmd->minor = reply.minor; | |
1443 | } else { | |
1444 | cmd->minor = be32toh(msg.minor); | |
1445 | } | |
1446 | ||
6151a90f JD |
1447 | reply.major = htobe32(reply.major); |
1448 | reply.minor = htobe32(reply.minor); | |
1449 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, | |
1450 | sizeof(struct lttcomm_relayd_version), 0); | |
1451 | if (ret < 0) { | |
1452 | ERR("Relay sending version"); | |
1453 | } | |
1454 | ||
0f907de1 JD |
1455 | DBG("Version check done using protocol %u.%u", cmd->major, |
1456 | cmd->minor); | |
b8aa1682 JD |
1457 | |
1458 | end: | |
1459 | return ret; | |
1460 | } | |
1461 | ||
c8f59ee5 | 1462 | /* |
6d805429 | 1463 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 DG |
1464 | */ |
1465 | static | |
6d805429 | 1466 | int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
d3e2ba59 | 1467 | struct relay_command *cmd) |
c8f59ee5 DG |
1468 | { |
1469 | struct relay_session *session = cmd->session; | |
6d805429 | 1470 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1471 | struct lttcomm_relayd_generic_reply reply; |
1472 | struct relay_stream *stream; | |
1473 | int ret; | |
c8f59ee5 DG |
1474 | uint64_t last_net_seq_num, stream_id; |
1475 | ||
6d805429 | 1476 | DBG("Data pending command received"); |
c8f59ee5 | 1477 | |
c5b6f4f0 | 1478 | if (!session || cmd->version_check_done == 0) { |
c8f59ee5 DG |
1479 | ERR("Trying to check for data before version check"); |
1480 | ret = -1; | |
1481 | goto end_no_session; | |
1482 | } | |
1483 | ||
7c5aef62 | 1484 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1485 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1486 | if (ret == 0) { |
1487 | /* Orderly shutdown. Not necessary to print an error. */ | |
1488 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1489 | } else { | |
1490 | ERR("Relay didn't receive valid data_pending struct size : %d", | |
1491 | ret); | |
1492 | } | |
c8f59ee5 DG |
1493 | ret = -1; |
1494 | goto end_no_session; | |
1495 | } | |
1496 | ||
1497 | stream_id = be64toh(msg.stream_id); | |
1498 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1499 | ||
1500 | rcu_read_lock(); | |
eb702af5 | 1501 | stream = stream_find_by_id(relay_streams_ht, stream_id); |
de91f48a | 1502 | if (stream == NULL) { |
c8f59ee5 DG |
1503 | ret = -1; |
1504 | goto end_unlock; | |
1505 | } | |
1506 | ||
6d805429 | 1507 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1508 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1509 | last_net_seq_num); | |
1510 | ||
33832e64 | 1511 | /* Avoid wrapping issue */ |
39df6d9f | 1512 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) >= 0) { |
6d805429 | 1513 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1514 | ret = 0; |
6d805429 DG |
1515 | } else { |
1516 | /* Data still being streamed thus pending */ | |
1517 | ret = 1; | |
c8f59ee5 DG |
1518 | } |
1519 | ||
f7079f67 DG |
1520 | /* Pending check is now done. */ |
1521 | stream->data_pending_check_done = 1; | |
1522 | ||
c8f59ee5 DG |
1523 | end_unlock: |
1524 | rcu_read_unlock(); | |
1525 | ||
1526 | reply.ret_code = htobe32(ret); | |
1527 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1528 | if (ret < 0) { | |
6d805429 | 1529 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1530 | } |
1531 | ||
1532 | end_no_session: | |
1533 | return ret; | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * Wait for the control socket to reach a quiescent state. | |
1538 | * | |
1539 | * Note that for now, when receiving this command from the session daemon, this | |
1540 | * means that every subsequent commands or data received on the control socket | |
1541 | * has been handled. So, this is why we simply return OK here. | |
1542 | */ | |
1543 | static | |
1544 | int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1545 | struct relay_command *cmd) |
c8f59ee5 DG |
1546 | { |
1547 | int ret; | |
ad7051c0 DG |
1548 | uint64_t stream_id; |
1549 | struct relay_stream *stream; | |
1550 | struct lttng_ht_iter iter; | |
1551 | struct lttcomm_relayd_quiescent_control msg; | |
c8f59ee5 DG |
1552 | struct lttcomm_relayd_generic_reply reply; |
1553 | ||
1554 | DBG("Checking quiescent state on control socket"); | |
1555 | ||
ad7051c0 DG |
1556 | if (!cmd->session || cmd->version_check_done == 0) { |
1557 | ERR("Trying to check for data before version check"); | |
1558 | ret = -1; | |
1559 | goto end_no_session; | |
1560 | } | |
1561 | ||
1562 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1563 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1564 | if (ret == 0) { |
1565 | /* Orderly shutdown. Not necessary to print an error. */ | |
1566 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1567 | } else { | |
1568 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1569 | ret); | |
1570 | } | |
ad7051c0 DG |
1571 | ret = -1; |
1572 | goto end_no_session; | |
1573 | } | |
1574 | ||
1575 | stream_id = be64toh(msg.stream_id); | |
1576 | ||
1577 | rcu_read_lock(); | |
d3e2ba59 | 1578 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
eb702af5 | 1579 | node.node) { |
ad7051c0 DG |
1580 | if (stream->stream_handle == stream_id) { |
1581 | stream->data_pending_check_done = 1; | |
1582 | DBG("Relay quiescent control pending flag set to %" PRIu64, | |
1583 | stream_id); | |
1584 | break; | |
1585 | } | |
1586 | } | |
1587 | rcu_read_unlock(); | |
1588 | ||
c8f59ee5 DG |
1589 | reply.ret_code = htobe32(LTTNG_OK); |
1590 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1591 | if (ret < 0) { | |
6d805429 | 1592 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1593 | } |
1594 | ||
ad7051c0 | 1595 | end_no_session: |
c8f59ee5 DG |
1596 | return ret; |
1597 | } | |
1598 | ||
f7079f67 DG |
1599 | /* |
1600 | * Initialize a data pending command. This means that a client is about to ask | |
1601 | * for data pending for each stream he/she holds. Simply iterate over all | |
1602 | * streams of a session and set the data_pending_check_done flag. | |
1603 | * | |
1604 | * This command returns to the client a LTTNG_OK code. | |
1605 | */ | |
1606 | static | |
1607 | int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1608 | struct relay_command *cmd) |
f7079f67 DG |
1609 | { |
1610 | int ret; | |
1611 | struct lttng_ht_iter iter; | |
1612 | struct lttcomm_relayd_begin_data_pending msg; | |
1613 | struct lttcomm_relayd_generic_reply reply; | |
1614 | struct relay_stream *stream; | |
1615 | uint64_t session_id; | |
1616 | ||
1617 | assert(recv_hdr); | |
1618 | assert(cmd); | |
f7079f67 DG |
1619 | |
1620 | DBG("Init streams for data pending"); | |
1621 | ||
1622 | if (!cmd->session || cmd->version_check_done == 0) { | |
1623 | ERR("Trying to check for data before version check"); | |
1624 | ret = -1; | |
1625 | goto end_no_session; | |
1626 | } | |
1627 | ||
1628 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1629 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1630 | if (ret == 0) { |
1631 | /* Orderly shutdown. Not necessary to print an error. */ | |
1632 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1633 | } else { | |
1634 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1635 | ret); | |
1636 | } | |
f7079f67 DG |
1637 | ret = -1; |
1638 | goto end_no_session; | |
1639 | } | |
1640 | ||
1641 | session_id = be64toh(msg.session_id); | |
1642 | ||
1643 | /* | |
1644 | * Iterate over all streams to set the begin data pending flag. For now, the | |
1645 | * streams are indexed by stream handle so we have to iterate over all | |
1646 | * streams to find the one associated with the right session_id. | |
1647 | */ | |
1648 | rcu_read_lock(); | |
d3e2ba59 | 1649 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
eb702af5 DG |
1650 | node.node) { |
1651 | if (stream->session_id == session_id) { | |
f7079f67 DG |
1652 | stream->data_pending_check_done = 0; |
1653 | DBG("Set begin data pending flag to stream %" PRIu64, | |
1654 | stream->stream_handle); | |
1655 | } | |
1656 | } | |
1657 | rcu_read_unlock(); | |
1658 | ||
1659 | /* All good, send back reply. */ | |
1660 | reply.ret_code = htobe32(LTTNG_OK); | |
1661 | ||
1662 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1663 | if (ret < 0) { | |
1664 | ERR("Relay begin data pending send reply failed"); | |
1665 | } | |
1666 | ||
1667 | end_no_session: | |
1668 | return ret; | |
1669 | } | |
1670 | ||
1671 | /* | |
1672 | * End data pending command. This will check, for a given session id, if each | |
1673 | * stream associated with it has its data_pending_check_done flag set. If not, | |
1674 | * this means that the client lost track of the stream but the data is still | |
1675 | * being streamed on our side. In this case, we inform the client that data is | |
1676 | * inflight. | |
1677 | * | |
1678 | * Return to the client if there is data in flight or not with a ret_code. | |
1679 | */ | |
1680 | static | |
1681 | int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1682 | struct relay_command *cmd) |
f7079f67 DG |
1683 | { |
1684 | int ret; | |
1685 | struct lttng_ht_iter iter; | |
1686 | struct lttcomm_relayd_end_data_pending msg; | |
1687 | struct lttcomm_relayd_generic_reply reply; | |
1688 | struct relay_stream *stream; | |
1689 | uint64_t session_id; | |
1690 | uint32_t is_data_inflight = 0; | |
1691 | ||
1692 | assert(recv_hdr); | |
1693 | assert(cmd); | |
f7079f67 DG |
1694 | |
1695 | DBG("End data pending command"); | |
1696 | ||
1697 | if (!cmd->session || cmd->version_check_done == 0) { | |
1698 | ERR("Trying to check for data before version check"); | |
1699 | ret = -1; | |
1700 | goto end_no_session; | |
1701 | } | |
1702 | ||
1703 | ret = cmd->sock->ops->recvmsg(cmd->sock, &msg, sizeof(msg), 0); | |
1704 | if (ret < sizeof(msg)) { | |
a6cd2b97 DG |
1705 | if (ret == 0) { |
1706 | /* Orderly shutdown. Not necessary to print an error. */ | |
1707 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1708 | } else { | |
1709 | ERR("Relay didn't receive valid end data_pending struct size: %d", | |
1710 | ret); | |
1711 | } | |
f7079f67 DG |
1712 | ret = -1; |
1713 | goto end_no_session; | |
1714 | } | |
1715 | ||
1716 | session_id = be64toh(msg.session_id); | |
1717 | ||
1718 | /* Iterate over all streams to see if the begin data pending flag is set. */ | |
1719 | rcu_read_lock(); | |
d3e2ba59 | 1720 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
eb702af5 DG |
1721 | node.node) { |
1722 | if (stream->session_id == session_id && | |
f7079f67 DG |
1723 | !stream->data_pending_check_done) { |
1724 | is_data_inflight = 1; | |
1725 | DBG("Data is still in flight for stream %" PRIu64, | |
1726 | stream->stream_handle); | |
1727 | break; | |
1728 | } | |
1729 | } | |
1730 | rcu_read_unlock(); | |
1731 | ||
1732 | /* All good, send back reply. */ | |
1733 | reply.ret_code = htobe32(is_data_inflight); | |
1734 | ||
1735 | ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1736 | if (ret < 0) { | |
1737 | ERR("Relay end data pending send reply failed"); | |
1738 | } | |
1739 | ||
1740 | end_no_session: | |
1741 | return ret; | |
1742 | } | |
1743 | ||
1c20f0e2 JD |
1744 | /* |
1745 | * Receive an index for a specific stream. | |
1746 | * | |
1747 | * Return 0 on success else a negative value. | |
1748 | */ | |
1749 | static | |
1750 | int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, | |
0a6518b0 | 1751 | struct relay_command *cmd) |
1c20f0e2 JD |
1752 | { |
1753 | int ret, send_ret, index_created = 0; | |
1754 | struct relay_session *session = cmd->session; | |
1755 | struct lttcomm_relayd_index index_info; | |
1756 | struct relay_index *index, *wr_index = NULL; | |
1757 | struct lttcomm_relayd_generic_reply reply; | |
1758 | struct relay_stream *stream; | |
1759 | uint64_t net_seq_num; | |
1760 | ||
1761 | assert(cmd); | |
1c20f0e2 JD |
1762 | |
1763 | DBG("Relay receiving index"); | |
1764 | ||
1765 | if (!session || cmd->version_check_done == 0) { | |
1766 | ERR("Trying to close a stream before version check"); | |
1767 | ret = -1; | |
1768 | goto end_no_session; | |
1769 | } | |
1770 | ||
1771 | ret = cmd->sock->ops->recvmsg(cmd->sock, &index_info, | |
1772 | sizeof(index_info), 0); | |
1773 | if (ret < sizeof(index_info)) { | |
1774 | if (ret == 0) { | |
1775 | /* Orderly shutdown. Not necessary to print an error. */ | |
1776 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
1777 | } else { | |
1778 | ERR("Relay didn't receive valid index struct size : %d", ret); | |
1779 | } | |
1780 | ret = -1; | |
1781 | goto end_no_session; | |
1782 | } | |
1783 | ||
1784 | net_seq_num = be64toh(index_info.net_seq_num); | |
1785 | ||
1786 | rcu_read_lock(); | |
eb702af5 DG |
1787 | stream = stream_find_by_id(relay_streams_ht, |
1788 | be64toh(index_info.relay_stream_id)); | |
1c20f0e2 JD |
1789 | if (!stream) { |
1790 | ret = -1; | |
1791 | goto end_rcu_unlock; | |
1792 | } | |
1793 | ||
d3e2ba59 JD |
1794 | /* Live beacon handling */ |
1795 | if (index_info.packet_size == 0) { | |
1796 | DBG("Received live beacon for stream %" PRIu64, stream->stream_handle); | |
1797 | ||
1798 | /* | |
1799 | * Only flag a stream inactive when it has already received data. | |
1800 | */ | |
1801 | if (stream->total_index_received > 0) { | |
1802 | stream->beacon_ts_end = be64toh(index_info.timestamp_end); | |
1803 | } | |
1804 | ret = 0; | |
1805 | goto end_rcu_unlock; | |
1806 | } else { | |
1807 | stream->beacon_ts_end = -1ULL; | |
1808 | } | |
1809 | ||
0a6518b0 | 1810 | index = relay_index_find(stream->stream_handle, net_seq_num); |
1c20f0e2 JD |
1811 | if (!index) { |
1812 | /* A successful creation will add the object to the HT. */ | |
1813 | index = relay_index_create(stream->stream_handle, net_seq_num); | |
1814 | if (!index) { | |
1815 | goto end_rcu_unlock; | |
1816 | } | |
1817 | index_created = 1; | |
1818 | } | |
1819 | ||
1820 | copy_index_control_data(index, &index_info); | |
1821 | ||
1822 | if (index_created) { | |
1823 | /* | |
1824 | * Try to add the relay index object to the hash table. If an object | |
1825 | * already exist, destroy back the index created, set the data in this | |
1826 | * object and write it on disk. | |
1827 | */ | |
0a6518b0 | 1828 | relay_index_add(index, &wr_index); |
1c20f0e2 JD |
1829 | if (wr_index) { |
1830 | copy_index_control_data(wr_index, &index_info); | |
1831 | free(index); | |
1832 | } | |
1833 | } else { | |
1834 | /* The index already exists so write it on disk. */ | |
1835 | wr_index = index; | |
1836 | } | |
1837 | ||
1838 | /* Do we have a writable ready index to write on disk. */ | |
1839 | if (wr_index) { | |
1840 | /* Starting at 2.4, create the index file if none available. */ | |
1841 | if (cmd->minor >= 4 && stream->index_fd < 0) { | |
1842 | ret = index_create_file(stream->path_name, stream->channel_name, | |
1843 | relayd_uid, relayd_gid, stream->tracefile_size, | |
1844 | stream->tracefile_count_current); | |
1845 | if (ret < 0) { | |
1846 | goto end_rcu_unlock; | |
1847 | } | |
1848 | stream->index_fd = ret; | |
1849 | } | |
1850 | ||
0a6518b0 | 1851 | ret = relay_index_write(wr_index->fd, wr_index); |
1c20f0e2 JD |
1852 | if (ret < 0) { |
1853 | goto end_rcu_unlock; | |
1854 | } | |
d3e2ba59 | 1855 | stream->total_index_received++; |
1c20f0e2 JD |
1856 | } |
1857 | ||
1858 | end_rcu_unlock: | |
1859 | rcu_read_unlock(); | |
1860 | ||
1861 | if (ret < 0) { | |
1862 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1863 | } else { | |
1864 | reply.ret_code = htobe32(LTTNG_OK); | |
1865 | } | |
1866 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1867 | if (send_ret < 0) { | |
1868 | ERR("Relay sending close index id reply"); | |
1869 | ret = send_ret; | |
1870 | } | |
1871 | ||
1872 | end_no_session: | |
1873 | return ret; | |
1874 | } | |
1875 | ||
814fcae4 JD |
1876 | /* |
1877 | * Receive the streams_sent message. | |
1878 | * | |
1879 | * Return 0 on success else a negative value. | |
1880 | */ | |
1881 | static | |
1882 | int relay_streams_sent(struct lttcomm_relayd_hdr *recv_hdr, | |
1883 | struct relay_command *cmd) | |
1884 | { | |
1885 | int ret, send_ret; | |
1886 | struct lttcomm_relayd_generic_reply reply; | |
1887 | ||
1888 | assert(cmd); | |
1889 | ||
1890 | DBG("Relay receiving streams_sent"); | |
1891 | ||
1892 | if (!cmd->session || cmd->version_check_done == 0) { | |
1893 | ERR("Trying to close a stream before version check"); | |
1894 | ret = -1; | |
1895 | goto end_no_session; | |
1896 | } | |
1897 | ||
1898 | /* | |
1899 | * Flag every pending stream in the connection recv list that they are | |
1900 | * ready to be used by the viewer. | |
1901 | */ | |
1902 | set_viewer_ready_flag(cmd); | |
1903 | ||
829007d9 JD |
1904 | /* |
1905 | * Inform the viewer that there are new streams in the session. | |
1906 | */ | |
1907 | uatomic_set(&cmd->session->new_streams, 1); | |
1908 | ||
814fcae4 JD |
1909 | reply.ret_code = htobe32(LTTNG_OK); |
1910 | send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); | |
1911 | if (send_ret < 0) { | |
1912 | ERR("Relay sending sent_stream reply"); | |
1913 | ret = send_ret; | |
1914 | } else { | |
1915 | /* Success. */ | |
1916 | ret = 0; | |
1917 | } | |
1918 | ||
1919 | end_no_session: | |
1920 | return ret; | |
1921 | } | |
1922 | ||
b8aa1682 | 1923 | /* |
d3e2ba59 | 1924 | * Process the commands received on the control socket |
b8aa1682 JD |
1925 | */ |
1926 | static | |
1927 | int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, | |
d3e2ba59 | 1928 | struct relay_command *cmd, struct relay_local_data *ctx) |
b8aa1682 JD |
1929 | { |
1930 | int ret = 0; | |
1931 | ||
1932 | switch (be32toh(recv_hdr->cmd)) { | |
b8aa1682 | 1933 | case RELAYD_CREATE_SESSION: |
d3e2ba59 | 1934 | ret = relay_create_session(recv_hdr, cmd, ctx->sessions_ht); |
b8aa1682 | 1935 | break; |
b8aa1682 | 1936 | case RELAYD_ADD_STREAM: |
d3e2ba59 | 1937 | ret = relay_add_stream(recv_hdr, cmd, ctx->sessions_ht); |
b8aa1682 JD |
1938 | break; |
1939 | case RELAYD_START_DATA: | |
1940 | ret = relay_start(recv_hdr, cmd); | |
1941 | break; | |
1942 | case RELAYD_SEND_METADATA: | |
d3e2ba59 | 1943 | ret = relay_recv_metadata(recv_hdr, cmd); |
b8aa1682 JD |
1944 | break; |
1945 | case RELAYD_VERSION: | |
d3e2ba59 | 1946 | ret = relay_send_version(recv_hdr, cmd, ctx->sessions_ht); |
b8aa1682 | 1947 | break; |
173af62f | 1948 | case RELAYD_CLOSE_STREAM: |
92c6ca54 | 1949 | ret = relay_close_stream(recv_hdr, cmd); |
173af62f | 1950 | break; |
6d805429 | 1951 | case RELAYD_DATA_PENDING: |
d3e2ba59 | 1952 | ret = relay_data_pending(recv_hdr, cmd); |
c8f59ee5 DG |
1953 | break; |
1954 | case RELAYD_QUIESCENT_CONTROL: | |
d3e2ba59 | 1955 | ret = relay_quiescent_control(recv_hdr, cmd); |
c8f59ee5 | 1956 | break; |
f7079f67 | 1957 | case RELAYD_BEGIN_DATA_PENDING: |
d3e2ba59 | 1958 | ret = relay_begin_data_pending(recv_hdr, cmd); |
f7079f67 DG |
1959 | break; |
1960 | case RELAYD_END_DATA_PENDING: | |
d3e2ba59 | 1961 | ret = relay_end_data_pending(recv_hdr, cmd); |
f7079f67 | 1962 | break; |
1c20f0e2 | 1963 | case RELAYD_SEND_INDEX: |
0a6518b0 | 1964 | ret = relay_recv_index(recv_hdr, cmd); |
1c20f0e2 | 1965 | break; |
814fcae4 JD |
1966 | case RELAYD_STREAMS_SENT: |
1967 | ret = relay_streams_sent(recv_hdr, cmd); | |
1968 | break; | |
b8aa1682 JD |
1969 | case RELAYD_UPDATE_SYNC_INFO: |
1970 | default: | |
1971 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
1972 | relay_unknown_command(cmd); | |
1973 | ret = -1; | |
1974 | goto end; | |
1975 | } | |
1976 | ||
1977 | end: | |
1978 | return ret; | |
1979 | } | |
1980 | ||
7d2f7452 DG |
1981 | /* |
1982 | * Handle index for a data stream. | |
1983 | * | |
1984 | * RCU read side lock MUST be acquired. | |
1985 | * | |
1986 | * Return 0 on success else a negative value. | |
1987 | */ | |
1988 | static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num, | |
1989 | int rotate_index) | |
1990 | { | |
1991 | int ret = 0, index_created = 0; | |
1992 | uint64_t stream_id, data_offset; | |
1993 | struct relay_index *index, *wr_index = NULL; | |
1994 | ||
1995 | assert(stream); | |
1996 | ||
1997 | stream_id = stream->stream_handle; | |
1998 | /* Get data offset because we are about to update the index. */ | |
1999 | data_offset = htobe64(stream->tracefile_size_current); | |
2000 | ||
2001 | /* | |
2002 | * Lookup for an existing index for that stream id/sequence number. If on | |
2003 | * exists, the control thread already received the data for it thus we need | |
2004 | * to write it on disk. | |
2005 | */ | |
2006 | index = relay_index_find(stream_id, net_seq_num); | |
2007 | if (!index) { | |
2008 | /* A successful creation will add the object to the HT. */ | |
2009 | index = relay_index_create(stream_id, net_seq_num); | |
2010 | if (!index) { | |
2011 | ret = -1; | |
2012 | goto error; | |
2013 | } | |
2014 | index_created = 1; | |
2015 | } | |
2016 | ||
2017 | if (rotate_index || stream->index_fd < 0) { | |
2018 | index->to_close_fd = stream->index_fd; | |
2019 | ret = index_create_file(stream->path_name, stream->channel_name, | |
2020 | relayd_uid, relayd_gid, stream->tracefile_size, | |
2021 | stream->tracefile_count_current); | |
2022 | if (ret < 0) { | |
2023 | /* This will close the stream's index fd if one. */ | |
2024 | relay_index_free_safe(index); | |
2025 | goto error; | |
2026 | } | |
2027 | stream->index_fd = ret; | |
2028 | } | |
2029 | index->fd = stream->index_fd; | |
2030 | index->index_data.offset = data_offset; | |
2031 | ||
2032 | if (index_created) { | |
2033 | /* | |
2034 | * Try to add the relay index object to the hash table. If an object | |
2035 | * already exist, destroy back the index created and set the data. | |
2036 | */ | |
2037 | relay_index_add(index, &wr_index); | |
2038 | if (wr_index) { | |
2039 | /* Copy back data from the created index. */ | |
2040 | wr_index->fd = index->fd; | |
2041 | wr_index->to_close_fd = index->to_close_fd; | |
2042 | wr_index->index_data.offset = data_offset; | |
2043 | free(index); | |
2044 | } | |
2045 | } else { | |
2046 | /* The index already exists so write it on disk. */ | |
2047 | wr_index = index; | |
2048 | } | |
2049 | ||
2050 | /* Do we have a writable ready index to write on disk. */ | |
2051 | if (wr_index) { | |
2052 | ret = relay_index_write(wr_index->fd, wr_index); | |
2053 | if (ret < 0) { | |
2054 | goto error; | |
2055 | } | |
2056 | stream->total_index_received++; | |
2057 | } | |
2058 | ||
2059 | error: | |
2060 | return ret; | |
2061 | } | |
2062 | ||
b8aa1682 JD |
2063 | /* |
2064 | * relay_process_data: Process the data received on the data socket | |
2065 | */ | |
2066 | static | |
eb702af5 | 2067 | int relay_process_data(struct relay_command *cmd, struct lttng_ht *sessions_ht) |
b8aa1682 | 2068 | { |
7d2f7452 | 2069 | int ret = 0, rotate_index = 0; |
6cd525e8 | 2070 | ssize_t size_ret; |
b8aa1682 JD |
2071 | struct relay_stream *stream; |
2072 | struct lttcomm_relayd_data_hdr data_hdr; | |
7d2f7452 | 2073 | uint64_t stream_id; |
173af62f | 2074 | uint64_t net_seq_num; |
b8aa1682 | 2075 | uint32_t data_size; |
eb702af5 | 2076 | struct relay_session *session; |
b8aa1682 JD |
2077 | |
2078 | ret = cmd->sock->ops->recvmsg(cmd->sock, &data_hdr, | |
7c5aef62 | 2079 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 | 2080 | if (ret <= 0) { |
a6cd2b97 DG |
2081 | if (ret == 0) { |
2082 | /* Orderly shutdown. Not necessary to print an error. */ | |
2083 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
2084 | } else { | |
2085 | ERR("Unable to receive data header on sock %d", cmd->sock->fd); | |
2086 | } | |
b8aa1682 JD |
2087 | ret = -1; |
2088 | goto end; | |
2089 | } | |
2090 | ||
2091 | stream_id = be64toh(data_hdr.stream_id); | |
9d1bbf21 MD |
2092 | |
2093 | rcu_read_lock(); | |
eb702af5 | 2094 | stream = stream_find_by_id(relay_streams_ht, stream_id); |
b8aa1682 JD |
2095 | if (!stream) { |
2096 | ret = -1; | |
1c20f0e2 | 2097 | goto end_rcu_unlock; |
b8aa1682 JD |
2098 | } |
2099 | ||
eb702af5 DG |
2100 | session = session_find_by_id(sessions_ht, stream->session_id); |
2101 | assert(session); | |
2102 | ||
b8aa1682 JD |
2103 | data_size = be32toh(data_hdr.data_size); |
2104 | if (data_buffer_size < data_size) { | |
c617c0c6 MD |
2105 | char *tmp_data_ptr; |
2106 | ||
2107 | tmp_data_ptr = realloc(data_buffer, data_size); | |
2108 | if (!tmp_data_ptr) { | |
b8aa1682 | 2109 | ERR("Allocating data buffer"); |
c617c0c6 | 2110 | free(data_buffer); |
b8aa1682 | 2111 | ret = -1; |
1c20f0e2 | 2112 | goto end_rcu_unlock; |
b8aa1682 | 2113 | } |
c617c0c6 | 2114 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
2115 | data_buffer_size = data_size; |
2116 | } | |
2117 | memset(data_buffer, 0, data_size); | |
2118 | ||
173af62f DG |
2119 | net_seq_num = be64toh(data_hdr.net_seq_num); |
2120 | ||
77c7c900 | 2121 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 2122 | data_size, stream_id, net_seq_num); |
7c5aef62 | 2123 | ret = cmd->sock->ops->recvmsg(cmd->sock, data_buffer, data_size, 0); |
b8aa1682 | 2124 | if (ret <= 0) { |
a6cd2b97 DG |
2125 | if (ret == 0) { |
2126 | /* Orderly shutdown. Not necessary to print an error. */ | |
2127 | DBG("Socket %d did an orderly shutdown", cmd->sock->fd); | |
2128 | } | |
b8aa1682 | 2129 | ret = -1; |
1c20f0e2 | 2130 | goto end_rcu_unlock; |
b8aa1682 JD |
2131 | } |
2132 | ||
1c20f0e2 | 2133 | /* Check if a rotation is needed. */ |
0f907de1 JD |
2134 | if (stream->tracefile_size > 0 && |
2135 | (stream->tracefile_size_current + data_size) > | |
2136 | stream->tracefile_size) { | |
6b6b9a5a JD |
2137 | struct relay_viewer_stream *vstream; |
2138 | uint64_t new_id; | |
2139 | ||
2140 | new_id = (stream->tracefile_count_current + 1) % | |
2141 | stream->tracefile_count; | |
2142 | /* | |
2143 | * When we wrap-around back to 0, we start overwriting old | |
2144 | * trace data. | |
2145 | */ | |
2146 | if (!stream->tracefile_overwrite && new_id == 0) { | |
2147 | stream->tracefile_overwrite = 1; | |
2148 | } | |
2149 | pthread_mutex_lock(&stream->viewer_stream_rotation_lock); | |
2150 | if (stream->tracefile_overwrite) { | |
2151 | stream->oldest_tracefile_id = | |
2152 | (stream->oldest_tracefile_id + 1) % | |
2153 | stream->tracefile_count; | |
2154 | } | |
991adae2 | 2155 | vstream = viewer_stream_find_by_id(stream->stream_handle); |
6b6b9a5a JD |
2156 | if (vstream) { |
2157 | /* | |
2158 | * The viewer is reading a file about to be | |
2159 | * overwritten. Close the FDs it is | |
2160 | * currently using and let it handle the fault. | |
2161 | */ | |
2162 | if (vstream->tracefile_count_current == new_id) { | |
cef0f7d5 | 2163 | pthread_mutex_lock(&vstream->overwrite_lock); |
6b6b9a5a | 2164 | vstream->abort_flag = 1; |
cef0f7d5 | 2165 | pthread_mutex_unlock(&vstream->overwrite_lock); |
6b6b9a5a JD |
2166 | DBG("Streaming side setting abort_flag on stream %s_%lu\n", |
2167 | stream->channel_name, new_id); | |
2168 | } else if (vstream->tracefile_count_current == | |
2169 | stream->tracefile_count_current) { | |
2170 | /* | |
2171 | * The reader and writer were in the | |
2172 | * same trace file, inform the viewer | |
2173 | * that no new index will ever be added | |
2174 | * to this file. | |
2175 | */ | |
2176 | vstream->close_write_flag = 1; | |
2177 | } | |
2178 | } | |
1c20f0e2 JD |
2179 | ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, |
2180 | stream->tracefile_size, stream->tracefile_count, | |
2181 | relayd_uid, relayd_gid, stream->fd, | |
2182 | &(stream->tracefile_count_current), &stream->fd); | |
cef0f7d5 | 2183 | stream->total_index_received = 0; |
6b6b9a5a | 2184 | pthread_mutex_unlock(&stream->viewer_stream_rotation_lock); |
0f907de1 | 2185 | if (ret < 0) { |
1c20f0e2 JD |
2186 | ERR("Rotating stream output file"); |
2187 | goto end_rcu_unlock; | |
0f907de1 | 2188 | } |
a6976990 DG |
2189 | /* Reset current size because we just perform a stream rotation. */ |
2190 | stream->tracefile_size_current = 0; | |
1c20f0e2 JD |
2191 | rotate_index = 1; |
2192 | } | |
2193 | ||
1c20f0e2 | 2194 | /* |
7d2f7452 DG |
2195 | * Index are handled in protocol version 2.4 and above. Also, snapshot and |
2196 | * index are NOT supported. | |
1c20f0e2 | 2197 | */ |
eb702af5 | 2198 | if (session->minor >= 4 && !session->snapshot) { |
7d2f7452 | 2199 | ret = handle_index_data(stream, net_seq_num, rotate_index); |
1c20f0e2 | 2200 | if (ret < 0) { |
1c20f0e2 JD |
2201 | goto end_rcu_unlock; |
2202 | } | |
1c20f0e2 JD |
2203 | } |
2204 | ||
7d2f7452 | 2205 | /* Write data to stream output fd. */ |
6cd525e8 MD |
2206 | size_ret = lttng_write(stream->fd, data_buffer, data_size); |
2207 | if (size_ret < data_size) { | |
b8aa1682 JD |
2208 | ERR("Relay error writing data to file"); |
2209 | ret = -1; | |
1c20f0e2 | 2210 | goto end_rcu_unlock; |
b8aa1682 | 2211 | } |
1d4dfdef | 2212 | |
5ab7344e JD |
2213 | DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64, |
2214 | ret, stream->stream_handle); | |
2215 | ||
1d4dfdef DG |
2216 | ret = write_padding_to_file(stream->fd, be32toh(data_hdr.padding_size)); |
2217 | if (ret < 0) { | |
1c20f0e2 | 2218 | goto end_rcu_unlock; |
1d4dfdef | 2219 | } |
1c20f0e2 | 2220 | stream->tracefile_size_current += data_size + be32toh(data_hdr.padding_size); |
1d4dfdef | 2221 | |
173af62f DG |
2222 | stream->prev_seq = net_seq_num; |
2223 | ||
eb702af5 | 2224 | try_close_stream(session, stream); |
173af62f | 2225 | |
1c20f0e2 | 2226 | end_rcu_unlock: |
9d1bbf21 | 2227 | rcu_read_unlock(); |
b8aa1682 JD |
2228 | end: |
2229 | return ret; | |
2230 | } | |
2231 | ||
2232 | static | |
9d1bbf21 | 2233 | void relay_cleanup_poll_connection(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
2234 | { |
2235 | int ret; | |
2236 | ||
b8aa1682 JD |
2237 | lttng_poll_del(events, pollfd); |
2238 | ||
2239 | ret = close(pollfd); | |
2240 | if (ret < 0) { | |
2241 | ERR("Closing pollfd %d", pollfd); | |
2242 | } | |
2243 | } | |
2244 | ||
2245 | static | |
2246 | int relay_add_connection(int fd, struct lttng_poll_event *events, | |
2247 | struct lttng_ht *relay_connections_ht) | |
2248 | { | |
b8aa1682 | 2249 | struct relay_command *relay_connection; |
6cd525e8 | 2250 | ssize_t ret; |
b8aa1682 JD |
2251 | |
2252 | relay_connection = zmalloc(sizeof(struct relay_command)); | |
2253 | if (relay_connection == NULL) { | |
2254 | PERROR("Relay command zmalloc"); | |
9d1bbf21 | 2255 | goto error; |
b8aa1682 | 2256 | } |
6cd525e8 MD |
2257 | ret = lttng_read(fd, relay_connection, sizeof(struct relay_command)); |
2258 | if (ret < sizeof(struct relay_command)) { | |
b8aa1682 | 2259 | PERROR("read relay cmd pipe"); |
9d1bbf21 | 2260 | goto error_read; |
b8aa1682 | 2261 | } |
814fcae4 | 2262 | CDS_INIT_LIST_HEAD(&relay_connection->recv_head); |
b8aa1682 JD |
2263 | |
2264 | lttng_ht_node_init_ulong(&relay_connection->sock_n, | |
2265 | (unsigned long) relay_connection->sock->fd); | |
9d1bbf21 | 2266 | rcu_read_lock(); |
b8aa1682 JD |
2267 | lttng_ht_add_unique_ulong(relay_connections_ht, |
2268 | &relay_connection->sock_n); | |
9d1bbf21 MD |
2269 | rcu_read_unlock(); |
2270 | return lttng_poll_add(events, | |
b8aa1682 JD |
2271 | relay_connection->sock->fd, |
2272 | LPOLLIN | LPOLLRDHUP); | |
2273 | ||
9d1bbf21 MD |
2274 | error_read: |
2275 | free(relay_connection); | |
2276 | error: | |
2277 | return -1; | |
2278 | } | |
2279 | ||
2280 | static | |
2281 | void deferred_free_connection(struct rcu_head *head) | |
2282 | { | |
2283 | struct relay_command *relay_connection = | |
2284 | caa_container_of(head, struct relay_command, rcu_node); | |
5b6d8097 DG |
2285 | |
2286 | lttcomm_destroy_sock(relay_connection->sock); | |
9d1bbf21 MD |
2287 | free(relay_connection); |
2288 | } | |
2289 | ||
2290 | static | |
2291 | void relay_del_connection(struct lttng_ht *relay_connections_ht, | |
d3e2ba59 JD |
2292 | struct lttng_ht_iter *iter, struct relay_command *relay_connection, |
2293 | struct lttng_ht *sessions_ht) | |
9d1bbf21 MD |
2294 | { |
2295 | int ret; | |
2296 | ||
2297 | ret = lttng_ht_del(relay_connections_ht, iter); | |
2298 | assert(!ret); | |
c07d8a78 | 2299 | |
9d1bbf21 | 2300 | if (relay_connection->type == RELAY_CONTROL) { |
eb702af5 | 2301 | struct relay_stream *stream, *tmp_stream; |
814fcae4 JD |
2302 | |
2303 | /* Clean up recv list. */ | |
eb702af5 DG |
2304 | cds_list_for_each_entry_safe(stream, tmp_stream, |
2305 | &relay_connection->recv_head, recv_list) { | |
2306 | cds_list_del(&stream->recv_list); | |
814fcae4 | 2307 | } |
eb702af5 DG |
2308 | |
2309 | relay_delete_session(relay_connection, sessions_ht); | |
2310 | ||
9d1bbf21 | 2311 | } |
5b6d8097 | 2312 | |
c07d8a78 | 2313 | call_rcu(&relay_connection->rcu_node, deferred_free_connection); |
b8aa1682 JD |
2314 | } |
2315 | ||
2316 | /* | |
2317 | * This thread does the actual work | |
2318 | */ | |
2319 | static | |
2320 | void *relay_thread_worker(void *data) | |
2321 | { | |
beaad64c DG |
2322 | int ret, err = -1, last_seen_data_fd = -1; |
2323 | uint32_t nb_fd; | |
b8aa1682 JD |
2324 | struct relay_command *relay_connection; |
2325 | struct lttng_poll_event events; | |
2326 | struct lttng_ht *relay_connections_ht; | |
2327 | struct lttng_ht_node_ulong *node; | |
2328 | struct lttng_ht_iter iter; | |
b8aa1682 | 2329 | struct lttcomm_relayd_hdr recv_hdr; |
d3e2ba59 JD |
2330 | struct relay_local_data *relay_ctx = (struct relay_local_data *) data; |
2331 | struct lttng_ht *sessions_ht = relay_ctx->sessions_ht; | |
b8aa1682 JD |
2332 | |
2333 | DBG("[thread] Relay worker started"); | |
2334 | ||
9d1bbf21 MD |
2335 | rcu_register_thread(); |
2336 | ||
55706a7d MD |
2337 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
2338 | ||
4e5b8b82 MD |
2339 | if (testpoint(relayd_thread_worker)) { |
2340 | goto error_testpoint; | |
2341 | } | |
2342 | ||
f385ae0a MD |
2343 | health_code_update(); |
2344 | ||
b8aa1682 JD |
2345 | /* table of connections indexed on socket */ |
2346 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2347 | if (!relay_connections_ht) { |
2348 | goto relay_connections_ht_error; | |
2349 | } | |
b8aa1682 | 2350 | |
1c20f0e2 JD |
2351 | /* Tables of received indexes indexed by index handle and net_seq_num. */ |
2352 | indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64); | |
2353 | if (!indexes_ht) { | |
2354 | goto indexes_ht_error; | |
2355 | } | |
2356 | ||
b8aa1682 JD |
2357 | ret = create_thread_poll_set(&events, 2); |
2358 | if (ret < 0) { | |
2359 | goto error_poll_create; | |
2360 | } | |
2361 | ||
2362 | ret = lttng_poll_add(&events, relay_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); | |
2363 | if (ret < 0) { | |
2364 | goto error; | |
2365 | } | |
2366 | ||
beaad64c | 2367 | restart: |
b8aa1682 | 2368 | while (1) { |
beaad64c DG |
2369 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2370 | ||
f385ae0a MD |
2371 | health_code_update(); |
2372 | ||
b8aa1682 | 2373 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2374 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 2375 | health_poll_entry(); |
b8aa1682 | 2376 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 2377 | health_poll_exit(); |
b8aa1682 JD |
2378 | if (ret < 0) { |
2379 | /* | |
2380 | * Restart interrupted system call. | |
2381 | */ | |
2382 | if (errno == EINTR) { | |
2383 | goto restart; | |
2384 | } | |
2385 | goto error; | |
2386 | } | |
2387 | ||
0d9c5d77 DG |
2388 | nb_fd = ret; |
2389 | ||
beaad64c DG |
2390 | /* |
2391 | * Process control. The control connection is prioritised so we don't | |
2392 | * starve it with high throughout put tracing data on the data | |
2393 | * connection. | |
2394 | */ | |
b8aa1682 JD |
2395 | for (i = 0; i < nb_fd; i++) { |
2396 | /* Fetch once the poll data */ | |
beaad64c DG |
2397 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2398 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 2399 | |
f385ae0a MD |
2400 | health_code_update(); |
2401 | ||
b8aa1682 JD |
2402 | /* Thread quit pipe has been closed. Killing thread. */ |
2403 | ret = check_thread_quit_pipe(pollfd, revents); | |
2404 | if (ret) { | |
095a4ae5 MD |
2405 | err = 0; |
2406 | goto exit; | |
b8aa1682 JD |
2407 | } |
2408 | ||
2409 | /* Inspect the relay cmd pipe for new connection */ | |
2410 | if (pollfd == relay_cmd_pipe[0]) { | |
2411 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2412 | ERR("Relay pipe error"); | |
2413 | goto error; | |
2414 | } else if (revents & LPOLLIN) { | |
2415 | DBG("Relay command received"); | |
2416 | ret = relay_add_connection(relay_cmd_pipe[0], | |
2417 | &events, relay_connections_ht); | |
2418 | if (ret < 0) { | |
2419 | goto error; | |
2420 | } | |
2421 | } | |
beaad64c | 2422 | } else if (revents) { |
9d1bbf21 | 2423 | rcu_read_lock(); |
b8aa1682 JD |
2424 | lttng_ht_lookup(relay_connections_ht, |
2425 | (void *)((unsigned long) pollfd), | |
2426 | &iter); | |
2427 | node = lttng_ht_iter_get_node_ulong(&iter); | |
2428 | if (node == NULL) { | |
2429 | DBG2("Relay sock %d not found", pollfd); | |
9d1bbf21 | 2430 | rcu_read_unlock(); |
b8aa1682 JD |
2431 | goto error; |
2432 | } | |
2433 | relay_connection = caa_container_of(node, | |
2434 | struct relay_command, sock_n); | |
2435 | ||
2436 | if (revents & (LPOLLERR)) { | |
2437 | ERR("POLL ERROR"); | |
9d1bbf21 MD |
2438 | relay_cleanup_poll_connection(&events, pollfd); |
2439 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2440 | &iter, relay_connection, sessions_ht); |
beaad64c DG |
2441 | if (last_seen_data_fd == pollfd) { |
2442 | last_seen_data_fd = last_notdel_data_fd; | |
2443 | } | |
b8aa1682 JD |
2444 | } else if (revents & (LPOLLHUP | LPOLLRDHUP)) { |
2445 | DBG("Socket %d hung up", pollfd); | |
9d1bbf21 MD |
2446 | relay_cleanup_poll_connection(&events, pollfd); |
2447 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2448 | &iter, relay_connection, sessions_ht); |
beaad64c DG |
2449 | if (last_seen_data_fd == pollfd) { |
2450 | last_seen_data_fd = last_notdel_data_fd; | |
2451 | } | |
b8aa1682 JD |
2452 | } else if (revents & LPOLLIN) { |
2453 | /* control socket */ | |
2454 | if (relay_connection->type == RELAY_CONTROL) { | |
2455 | ret = relay_connection->sock->ops->recvmsg( | |
2456 | relay_connection->sock, &recv_hdr, | |
7c5aef62 | 2457 | sizeof(struct lttcomm_relayd_hdr), 0); |
b8aa1682 JD |
2458 | /* connection closed */ |
2459 | if (ret <= 0) { | |
9d1bbf21 MD |
2460 | relay_cleanup_poll_connection(&events, pollfd); |
2461 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2462 | &iter, relay_connection, sessions_ht); |
b8aa1682 JD |
2463 | DBG("Control connection closed with %d", pollfd); |
2464 | } else { | |
2465 | if (relay_connection->session) { | |
77c7c900 | 2466 | DBG2("Relay worker receiving data for session : %" PRIu64, |
b8aa1682 JD |
2467 | relay_connection->session->id); |
2468 | } | |
2469 | ret = relay_process_control(&recv_hdr, | |
d3e2ba59 | 2470 | relay_connection, relay_ctx); |
b8aa1682 | 2471 | if (ret < 0) { |
beaad64c | 2472 | /* Clear the session on error. */ |
9d1bbf21 MD |
2473 | relay_cleanup_poll_connection(&events, pollfd); |
2474 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2475 | &iter, relay_connection, sessions_ht); |
b8aa1682 JD |
2476 | DBG("Connection closed with %d", pollfd); |
2477 | } | |
beaad64c | 2478 | seen_control = 1; |
b8aa1682 | 2479 | } |
beaad64c DG |
2480 | } else { |
2481 | /* | |
2482 | * Flag the last seen data fd not deleted. It will be | |
2483 | * used as the last seen fd if any fd gets deleted in | |
2484 | * this first loop. | |
2485 | */ | |
2486 | last_notdel_data_fd = pollfd; | |
2487 | } | |
2488 | } | |
2489 | rcu_read_unlock(); | |
2490 | } | |
2491 | } | |
2492 | ||
2493 | /* | |
2494 | * The last loop handled a control request, go back to poll to make | |
2495 | * sure we prioritise the control socket. | |
2496 | */ | |
2497 | if (seen_control) { | |
2498 | continue; | |
2499 | } | |
2500 | ||
2501 | if (last_seen_data_fd >= 0) { | |
2502 | for (i = 0; i < nb_fd; i++) { | |
2503 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
2504 | |
2505 | health_code_update(); | |
2506 | ||
beaad64c DG |
2507 | if (last_seen_data_fd == pollfd) { |
2508 | idx = i; | |
2509 | break; | |
2510 | } | |
2511 | } | |
2512 | } | |
2513 | ||
2514 | /* Process data connection. */ | |
2515 | for (i = idx + 1; i < nb_fd; i++) { | |
2516 | /* Fetch the poll data. */ | |
2517 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2518 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2519 | ||
f385ae0a MD |
2520 | health_code_update(); |
2521 | ||
beaad64c DG |
2522 | /* Skip the command pipe. It's handled in the first loop. */ |
2523 | if (pollfd == relay_cmd_pipe[0]) { | |
2524 | continue; | |
2525 | } | |
2526 | ||
2527 | if (revents) { | |
2528 | rcu_read_lock(); | |
2529 | lttng_ht_lookup(relay_connections_ht, | |
2530 | (void *)((unsigned long) pollfd), | |
2531 | &iter); | |
2532 | node = lttng_ht_iter_get_node_ulong(&iter); | |
2533 | if (node == NULL) { | |
2534 | /* Skip it. Might be removed before. */ | |
2535 | rcu_read_unlock(); | |
2536 | continue; | |
2537 | } | |
2538 | relay_connection = caa_container_of(node, | |
2539 | struct relay_command, sock_n); | |
2540 | ||
2541 | if (revents & LPOLLIN) { | |
2542 | if (relay_connection->type != RELAY_DATA) { | |
2543 | continue; | |
2544 | } | |
2545 | ||
eb702af5 DG |
2546 | ret = relay_process_data(relay_connection, |
2547 | sessions_ht); | |
beaad64c DG |
2548 | /* connection closed */ |
2549 | if (ret < 0) { | |
2550 | relay_cleanup_poll_connection(&events, pollfd); | |
2551 | relay_del_connection(relay_connections_ht, | |
d3e2ba59 | 2552 | &iter, relay_connection, sessions_ht); |
beaad64c DG |
2553 | DBG("Data connection closed with %d", pollfd); |
2554 | /* | |
2555 | * Every goto restart call sets the last seen fd where | |
2556 | * here we don't really care since we gracefully | |
2557 | * continue the loop after the connection is deleted. | |
2558 | */ | |
2559 | } else { | |
2560 | /* Keep last seen port. */ | |
2561 | last_seen_data_fd = pollfd; | |
2562 | rcu_read_unlock(); | |
2563 | goto restart; | |
b8aa1682 JD |
2564 | } |
2565 | } | |
9d1bbf21 | 2566 | rcu_read_unlock(); |
b8aa1682 JD |
2567 | } |
2568 | } | |
beaad64c | 2569 | last_seen_data_fd = -1; |
b8aa1682 JD |
2570 | } |
2571 | ||
f385ae0a MD |
2572 | /* Normal exit, no error */ |
2573 | ret = 0; | |
2574 | ||
095a4ae5 | 2575 | exit: |
b8aa1682 JD |
2576 | error: |
2577 | lttng_poll_clean(&events); | |
2578 | ||
2579 | /* empty the hash table and free the memory */ | |
9d1bbf21 | 2580 | rcu_read_lock(); |
b8aa1682 | 2581 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, node, node) { |
f385ae0a MD |
2582 | health_code_update(); |
2583 | ||
b8aa1682 JD |
2584 | node = lttng_ht_iter_get_node_ulong(&iter); |
2585 | if (node) { | |
2586 | relay_connection = caa_container_of(node, | |
2587 | struct relay_command, sock_n); | |
9d1bbf21 | 2588 | relay_del_connection(relay_connections_ht, |
d3e2ba59 | 2589 | &iter, relay_connection, sessions_ht); |
b8aa1682 | 2590 | } |
b8aa1682 | 2591 | } |
94d49140 | 2592 | rcu_read_unlock(); |
7d2f7452 DG |
2593 | error_poll_create: |
2594 | lttng_ht_destroy(indexes_ht); | |
1c20f0e2 | 2595 | indexes_ht_error: |
b8aa1682 | 2596 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 2597 | relay_connections_ht_error: |
6620da75 DG |
2598 | /* Close relay cmd pipes */ |
2599 | utils_close_pipe(relay_cmd_pipe); | |
095a4ae5 MD |
2600 | if (err) { |
2601 | DBG("Thread exited with error"); | |
2602 | } | |
b8aa1682 | 2603 | DBG("Worker thread cleanup complete"); |
095a4ae5 | 2604 | free(data_buffer); |
4e5b8b82 | 2605 | error_testpoint: |
f385ae0a MD |
2606 | if (err) { |
2607 | health_error(); | |
2608 | ERR("Health error occurred in %s", __func__); | |
2609 | } | |
2610 | health_unregister(health_relayd); | |
9d1bbf21 | 2611 | rcu_unregister_thread(); |
f385ae0a | 2612 | stop_threads(); |
b8aa1682 JD |
2613 | return NULL; |
2614 | } | |
2615 | ||
2616 | /* | |
2617 | * Create the relay command pipe to wake thread_manage_apps. | |
2618 | * Closed in cleanup(). | |
2619 | */ | |
2620 | static int create_relay_cmd_pipe(void) | |
2621 | { | |
a02de639 | 2622 | int ret; |
b8aa1682 | 2623 | |
a02de639 | 2624 | ret = utils_create_pipe_cloexec(relay_cmd_pipe); |
b8aa1682 | 2625 | |
b8aa1682 JD |
2626 | return ret; |
2627 | } | |
2628 | ||
2629 | /* | |
2630 | * main | |
2631 | */ | |
2632 | int main(int argc, char **argv) | |
2633 | { | |
2634 | int ret = 0; | |
2635 | void *status; | |
d3e2ba59 | 2636 | struct relay_local_data *relay_ctx; |
b8aa1682 | 2637 | |
b8aa1682 JD |
2638 | /* Parse arguments */ |
2639 | progname = argv[0]; | |
c617c0c6 | 2640 | if ((ret = parse_args(argc, argv)) < 0) { |
a02de639 | 2641 | goto exit; |
b8aa1682 JD |
2642 | } |
2643 | ||
2644 | if ((ret = set_signal_handler()) < 0) { | |
2645 | goto exit; | |
2646 | } | |
2647 | ||
4d513a50 DG |
2648 | /* Try to create directory if -o, --output is specified. */ |
2649 | if (opt_output_path) { | |
994fa64f DG |
2650 | if (*opt_output_path != '/') { |
2651 | ERR("Please specify an absolute path for -o, --output PATH"); | |
2652 | goto exit; | |
2653 | } | |
2654 | ||
4d513a50 DG |
2655 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG); |
2656 | if (ret < 0) { | |
2657 | ERR("Unable to create %s", opt_output_path); | |
2658 | goto exit; | |
2659 | } | |
2660 | } | |
2661 | ||
b8aa1682 | 2662 | /* Daemonize */ |
d1a3048a | 2663 | if (opt_daemon || opt_background) { |
02a6bb53 MD |
2664 | int i; |
2665 | ||
2666 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, | |
2667 | !opt_background); | |
b8aa1682 | 2668 | if (ret < 0) { |
a02de639 | 2669 | goto exit; |
b8aa1682 | 2670 | } |
02a6bb53 MD |
2671 | |
2672 | /* | |
2673 | * We are in the child. Make sure all other file | |
2674 | * descriptors are closed, in case we are called with | |
2675 | * more opened file descriptors than the standard ones. | |
2676 | */ | |
2677 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
2678 | (void) close(i); | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | /* Create thread quit pipe */ | |
2683 | if ((ret = init_thread_quit_pipe()) < 0) { | |
2684 | goto error; | |
b8aa1682 JD |
2685 | } |
2686 | ||
1c20f0e2 JD |
2687 | /* We need those values for the file/dir creation. */ |
2688 | relayd_uid = getuid(); | |
2689 | relayd_gid = getgid(); | |
b8aa1682 | 2690 | |
1c20f0e2 JD |
2691 | /* Check if daemon is UID = 0 */ |
2692 | if (relayd_uid == 0) { | |
a6a062a4 AM |
2693 | if (control_uri->port < 1024 || data_uri->port < 1024 || |
2694 | live_uri->port < 1024) { | |
b8aa1682 JD |
2695 | ERR("Need to be root to use ports < 1024"); |
2696 | ret = -1; | |
a02de639 | 2697 | goto exit; |
b8aa1682 JD |
2698 | } |
2699 | } | |
2700 | ||
2701 | /* Setup the thread apps communication pipe. */ | |
2702 | if ((ret = create_relay_cmd_pipe()) < 0) { | |
2703 | goto exit; | |
2704 | } | |
2705 | ||
2706 | /* Init relay command queue. */ | |
2707 | cds_wfq_init(&relay_cmd_queue.queue); | |
2708 | ||
2709 | /* Set up max poll set size */ | |
2710 | lttng_poll_set_max_size(); | |
2711 | ||
554831e7 MD |
2712 | /* Initialize communication library */ |
2713 | lttcomm_init(); | |
d5a5e58f | 2714 | lttcomm_inet_init(); |
554831e7 | 2715 | |
d3e2ba59 JD |
2716 | relay_ctx = zmalloc(sizeof(struct relay_local_data)); |
2717 | if (!relay_ctx) { | |
2718 | PERROR("relay_ctx"); | |
2719 | goto exit; | |
2720 | } | |
2721 | ||
2722 | /* tables of sessions indexed by session ID */ | |
eb702af5 | 2723 | relay_ctx->sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 JD |
2724 | if (!relay_ctx->sessions_ht) { |
2725 | goto exit_relay_ctx_sessions; | |
2726 | } | |
2727 | ||
2728 | /* tables of streams indexed by stream ID */ | |
eb702af5 | 2729 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 JD |
2730 | if (!relay_streams_ht) { |
2731 | goto exit_relay_ctx_streams; | |
2732 | } | |
2733 | ||
2734 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
2735 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2736 | if (!viewer_streams_ht) { | |
d3e2ba59 JD |
2737 | goto exit_relay_ctx_viewer_streams; |
2738 | } | |
2739 | ||
55706a7d MD |
2740 | /* Initialize thread health monitoring */ |
2741 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
2742 | if (!health_relayd) { | |
2743 | PERROR("health_app_create error"); | |
2744 | goto exit_health_app_create; | |
2745 | } | |
2746 | ||
65931c8b MD |
2747 | ret = utils_create_pipe(health_quit_pipe); |
2748 | if (ret < 0) { | |
2749 | goto error_health_pipe; | |
2750 | } | |
2751 | ||
2752 | /* Create thread to manage the client socket */ | |
2753 | ret = pthread_create(&health_thread, NULL, | |
2754 | thread_manage_health, (void *) NULL); | |
2755 | if (ret != 0) { | |
2756 | PERROR("pthread_create health"); | |
2757 | goto health_error; | |
2758 | } | |
2759 | ||
b8aa1682 JD |
2760 | /* Setup the dispatcher thread */ |
2761 | ret = pthread_create(&dispatcher_thread, NULL, | |
2762 | relay_thread_dispatcher, (void *) NULL); | |
2763 | if (ret != 0) { | |
2764 | PERROR("pthread_create dispatcher"); | |
2765 | goto exit_dispatcher; | |
2766 | } | |
2767 | ||
2768 | /* Setup the worker thread */ | |
2769 | ret = pthread_create(&worker_thread, NULL, | |
d3e2ba59 | 2770 | relay_thread_worker, (void *) relay_ctx); |
b8aa1682 JD |
2771 | if (ret != 0) { |
2772 | PERROR("pthread_create worker"); | |
2773 | goto exit_worker; | |
2774 | } | |
2775 | ||
2776 | /* Setup the listener thread */ | |
2777 | ret = pthread_create(&listener_thread, NULL, | |
2778 | relay_thread_listener, (void *) NULL); | |
2779 | if (ret != 0) { | |
2780 | PERROR("pthread_create listener"); | |
2781 | goto exit_listener; | |
2782 | } | |
2783 | ||
3557d456 | 2784 | ret = live_start_threads(live_uri, relay_ctx); |
d3e2ba59 JD |
2785 | if (ret != 0) { |
2786 | ERR("Starting live viewer threads"); | |
50138f51 | 2787 | goto exit_live; |
d3e2ba59 JD |
2788 | } |
2789 | ||
50138f51 | 2790 | exit_live: |
b8aa1682 JD |
2791 | ret = pthread_join(listener_thread, &status); |
2792 | if (ret != 0) { | |
2793 | PERROR("pthread_join"); | |
2794 | goto error; /* join error, exit without cleanup */ | |
2795 | } | |
2796 | ||
50138f51 | 2797 | exit_listener: |
b8aa1682 JD |
2798 | ret = pthread_join(worker_thread, &status); |
2799 | if (ret != 0) { | |
2800 | PERROR("pthread_join"); | |
2801 | goto error; /* join error, exit without cleanup */ | |
2802 | } | |
2803 | ||
50138f51 | 2804 | exit_worker: |
b8aa1682 JD |
2805 | ret = pthread_join(dispatcher_thread, &status); |
2806 | if (ret != 0) { | |
2807 | PERROR("pthread_join"); | |
2808 | goto error; /* join error, exit without cleanup */ | |
2809 | } | |
42415026 | 2810 | |
50138f51 | 2811 | exit_dispatcher: |
65931c8b MD |
2812 | ret = pthread_join(health_thread, &status); |
2813 | if (ret != 0) { | |
2814 | PERROR("pthread_join health thread"); | |
2815 | goto error; /* join error, exit without cleanup */ | |
2816 | } | |
2817 | ||
bd11e201 MD |
2818 | /* |
2819 | * Stop live threads only after joining other threads. | |
2820 | */ | |
2821 | live_stop_threads(); | |
2822 | ||
65931c8b MD |
2823 | health_error: |
2824 | utils_close_pipe(health_quit_pipe); | |
2825 | ||
2826 | error_health_pipe: | |
55706a7d MD |
2827 | health_app_destroy(health_relayd); |
2828 | ||
2829 | exit_health_app_create: | |
92c6ca54 | 2830 | lttng_ht_destroy(viewer_streams_ht); |
d3e2ba59 JD |
2831 | |
2832 | exit_relay_ctx_viewer_streams: | |
2833 | lttng_ht_destroy(relay_streams_ht); | |
2834 | ||
2835 | exit_relay_ctx_streams: | |
2836 | lttng_ht_destroy(relay_ctx->sessions_ht); | |
2837 | ||
2838 | exit_relay_ctx_sessions: | |
2839 | free(relay_ctx); | |
b8aa1682 JD |
2840 | |
2841 | exit: | |
2842 | cleanup(); | |
2843 | if (!ret) { | |
2844 | exit(EXIT_SUCCESS); | |
2845 | } | |
a02de639 | 2846 | |
b8aa1682 JD |
2847 | error: |
2848 | exit(EXIT_FAILURE); | |
2849 | } |