Commit | Line | Data |
---|---|---|
b8aa1682 JD |
1 | /* |
2 | * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
cd60b05a | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
b8aa1682 JD |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | */ | |
19 | ||
20 | #define _GNU_SOURCE | |
21 | #include <getopt.h> | |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
24 | #include <pthread.h> | |
25 | #include <signal.h> | |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <sys/mman.h> | |
30 | #include <sys/mount.h> | |
31 | #include <sys/resource.h> | |
32 | #include <sys/socket.h> | |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
35 | #include <sys/wait.h> | |
173af62f | 36 | #include <inttypes.h> |
b8aa1682 JD |
37 | #include <urcu/futex.h> |
38 | #include <urcu/uatomic.h> | |
39 | #include <unistd.h> | |
40 | #include <fcntl.h> | |
41 | #include <config.h> | |
42 | ||
43 | #include <lttng/lttng.h> | |
44 | #include <common/common.h> | |
45 | #include <common/compat/poll.h> | |
46 | #include <common/compat/socket.h> | |
47 | #include <common/defaults.h> | |
3fd27398 | 48 | #include <common/daemonize.h> |
b8aa1682 JD |
49 | #include <common/futex.h> |
50 | #include <common/sessiond-comm/sessiond-comm.h> | |
51 | #include <common/sessiond-comm/inet.h> | |
b8aa1682 JD |
52 | #include <common/sessiond-comm/relayd.h> |
53 | #include <common/uri.h> | |
a02de639 | 54 | #include <common/utils.h> |
cd60b05a | 55 | #include <common/config/config.h> |
b8aa1682 | 56 | |
0f907de1 | 57 | #include "cmd.h" |
d3e2ba59 | 58 | #include "ctf-trace.h" |
1c20f0e2 | 59 | #include "index.h" |
0f907de1 | 60 | #include "utils.h" |
b8aa1682 | 61 | #include "lttng-relayd.h" |
d3e2ba59 | 62 | #include "live.h" |
55706a7d | 63 | #include "health-relayd.h" |
9b5e0863 | 64 | #include "testpoint.h" |
2f8f53af | 65 | #include "viewer-stream.h" |
2a174661 DG |
66 | #include "session.h" |
67 | #include "stream.h" | |
58eb9381 | 68 | #include "connection.h" |
b8aa1682 JD |
69 | |
70 | /* command line options */ | |
0f907de1 | 71 | char *opt_output_path; |
b5218ffb | 72 | static int opt_daemon, opt_background; |
3fd27398 MD |
73 | |
74 | /* | |
75 | * We need to wait for listener and live listener threads, as well as | |
76 | * health check thread, before being ready to signal readiness. | |
77 | */ | |
78 | #define NR_LTTNG_RELAY_READY 3 | |
79 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
80 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ | |
81 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
82 | ||
095a4ae5 MD |
83 | static struct lttng_uri *control_uri; |
84 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 85 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
86 | |
87 | const char *progname; | |
b8aa1682 | 88 | |
65931c8b | 89 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
90 | static int tracing_group_name_override; |
91 | ||
92 | const char * const config_section_name = "relayd"; | |
65931c8b | 93 | |
b8aa1682 JD |
94 | /* |
95 | * Quit pipe for all threads. This permits a single cancellation point | |
96 | * for all threads when receiving an event on the pipe. | |
97 | */ | |
0b242f62 | 98 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
99 | |
100 | /* | |
101 | * This pipe is used to inform the worker thread that a command is queued and | |
102 | * ready to be processed. | |
103 | */ | |
58eb9381 | 104 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 105 | |
26c9d55e | 106 | /* Shared between threads */ |
b8aa1682 JD |
107 | static int dispatch_thread_exit; |
108 | ||
109 | static pthread_t listener_thread; | |
110 | static pthread_t dispatcher_thread; | |
111 | static pthread_t worker_thread; | |
65931c8b | 112 | static pthread_t health_thread; |
b8aa1682 | 113 | |
095a4ae5 | 114 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
115 | |
116 | /* | |
117 | * Relay command queue. | |
118 | * | |
119 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
120 | * queue. | |
121 | */ | |
58eb9381 | 122 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 JD |
123 | |
124 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
125 | static char *data_buffer; |
126 | static unsigned int data_buffer_size; | |
b8aa1682 | 127 | |
1c20f0e2 JD |
128 | /* We need those values for the file/dir creation. */ |
129 | static uid_t relayd_uid; | |
130 | static gid_t relayd_gid; | |
131 | ||
d3e2ba59 JD |
132 | /* Global relay stream hash table. */ |
133 | struct lttng_ht *relay_streams_ht; | |
134 | ||
92c6ca54 DG |
135 | /* Global relay viewer stream hash table. */ |
136 | struct lttng_ht *viewer_streams_ht; | |
137 | ||
0a6518b0 DG |
138 | /* Global hash table that stores relay index object. */ |
139 | struct lttng_ht *indexes_ht; | |
140 | ||
55706a7d | 141 | /* Relayd health monitoring */ |
eea7556c | 142 | struct health_app *health_relayd; |
55706a7d | 143 | |
cd60b05a JG |
144 | static struct option long_options[] = { |
145 | { "control-port", 1, 0, 'C', }, | |
146 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 147 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 148 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 149 | { "background", 0, 0, 'b', }, |
cd60b05a JG |
150 | { "group", 1, 0, 'g', }, |
151 | { "help", 0, 0, 'h', }, | |
152 | { "output", 1, 0, 'o', }, | |
153 | { "verbose", 0, 0, 'v', }, | |
154 | { "config", 1, 0, 'f' }, | |
155 | { NULL, 0, 0, 0, }, | |
156 | }; | |
157 | ||
158 | static const char *config_ignore_options[] = { "help", "config" }; | |
159 | ||
b8aa1682 JD |
160 | /* |
161 | * usage function on stderr | |
162 | */ | |
163 | static | |
164 | void usage(void) | |
165 | { | |
166 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); | |
994fa64f DG |
167 | fprintf(stderr, " -h, --help Display this usage.\n"); |
168 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
b5218ffb | 169 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
994fa64f DG |
170 | fprintf(stderr, " -C, --control-port URL Control port listening.\n"); |
171 | fprintf(stderr, " -D, --data-port URL Data port listening.\n"); | |
8d5c808e | 172 | fprintf(stderr, " -L, --live-port URL Live view port listening.\n"); |
994fa64f DG |
173 | fprintf(stderr, " -o, --output PATH Output path for traces. Must use an absolute path.\n"); |
174 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
65931c8b | 175 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
cd60b05a | 176 | fprintf(stderr, " -f --config Load daemon configuration file\n"); |
b8aa1682 JD |
177 | } |
178 | ||
cd60b05a JG |
179 | /* |
180 | * Take an option from the getopt output and set it in the right variable to be | |
181 | * used later. | |
182 | * | |
183 | * Return 0 on success else a negative value. | |
184 | */ | |
b8aa1682 | 185 | static |
cd60b05a | 186 | int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 187 | { |
cd60b05a JG |
188 | int ret; |
189 | ||
190 | switch (opt) { | |
191 | case 0: | |
192 | fprintf(stderr, "option %s", optname); | |
193 | if (arg) { | |
194 | fprintf(stderr, " with arg %s\n", arg); | |
195 | } | |
196 | break; | |
197 | case 'C': | |
198 | ret = uri_parse(arg, &control_uri); | |
199 | if (ret < 0) { | |
200 | ERR("Invalid control URI specified"); | |
201 | goto end; | |
202 | } | |
203 | if (control_uri->port == 0) { | |
204 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
205 | } | |
206 | break; | |
207 | case 'D': | |
208 | ret = uri_parse(arg, &data_uri); | |
209 | if (ret < 0) { | |
210 | ERR("Invalid data URI specified"); | |
211 | goto end; | |
212 | } | |
213 | if (data_uri->port == 0) { | |
214 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
215 | } | |
216 | break; | |
8d5c808e AM |
217 | case 'L': |
218 | ret = uri_parse(arg, &live_uri); | |
219 | if (ret < 0) { | |
220 | ERR("Invalid live URI specified"); | |
221 | goto end; | |
222 | } | |
223 | if (live_uri->port == 0) { | |
224 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
225 | } | |
226 | break; | |
cd60b05a JG |
227 | case 'd': |
228 | opt_daemon = 1; | |
229 | break; | |
b5218ffb MD |
230 | case 'b': |
231 | opt_background = 1; | |
232 | break; | |
cd60b05a JG |
233 | case 'g': |
234 | tracing_group_name = strdup(arg); | |
235 | tracing_group_name_override = 1; | |
236 | break; | |
237 | case 'h': | |
238 | usage(); | |
239 | exit(EXIT_FAILURE); | |
240 | case 'o': | |
241 | ret = asprintf(&opt_output_path, "%s", arg); | |
242 | if (ret < 0) { | |
243 | ret = -errno; | |
244 | PERROR("asprintf opt_output_path"); | |
245 | goto end; | |
246 | } | |
247 | break; | |
248 | case 'v': | |
249 | /* Verbose level can increase using multiple -v */ | |
250 | if (arg) { | |
251 | lttng_opt_verbose = config_parse_value(arg); | |
252 | } else { | |
253 | lttng_opt_verbose += 1; | |
254 | } | |
255 | break; | |
256 | default: | |
257 | /* Unknown option or other error. | |
258 | * Error is printed by getopt, just return */ | |
259 | ret = -1; | |
260 | goto end; | |
261 | } | |
262 | ||
263 | /* All good. */ | |
264 | ret = 0; | |
265 | ||
266 | end: | |
267 | return ret; | |
268 | } | |
269 | ||
270 | /* | |
271 | * config_entry_handler_cb used to handle options read from a config file. | |
272 | * See config_entry_handler_cb comment in common/config/config.h for the | |
273 | * return value conventions. | |
274 | */ | |
275 | static | |
276 | int config_entry_handler(const struct config_entry *entry, void *unused) | |
277 | { | |
278 | int ret = 0, i; | |
279 | ||
280 | if (!entry || !entry->name || !entry->value) { | |
281 | ret = -EINVAL; | |
282 | goto end; | |
283 | } | |
284 | ||
285 | /* Check if the option is to be ignored */ | |
286 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
287 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
288 | goto end; | |
289 | } | |
290 | } | |
291 | ||
292 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
293 | /* Ignore if entry name is not fully matched. */ | |
294 | if (strcmp(entry->name, long_options[i].name)) { | |
295 | continue; | |
296 | } | |
297 | ||
298 | /* | |
299 | * If the option takes no argument on the command line, we have to | |
300 | * check if the value is "true". We support non-zero numeric values, | |
301 | * true, on and yes. | |
302 | */ | |
303 | if (!long_options[i].has_arg) { | |
304 | ret = config_parse_value(entry->value); | |
305 | if (ret <= 0) { | |
306 | if (ret) { | |
307 | WARN("Invalid configuration value \"%s\" for option %s", | |
308 | entry->value, entry->name); | |
309 | } | |
310 | /* False, skip boolean config option. */ | |
311 | goto end; | |
312 | } | |
313 | } | |
314 | ||
315 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
316 | goto end; | |
317 | } | |
318 | ||
319 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
320 | entry->name); | |
321 | ||
322 | end: | |
323 | return ret; | |
324 | } | |
325 | ||
326 | static | |
327 | int set_options(int argc, char **argv) | |
328 | { | |
329 | int c, ret = 0, option_index = 0; | |
330 | int orig_optopt = optopt, orig_optind = optind; | |
331 | char *default_address, *optstring; | |
332 | const char *config_path = NULL; | |
333 | ||
334 | optstring = utils_generate_optstring(long_options, | |
335 | sizeof(long_options) / sizeof(struct option)); | |
336 | if (!optstring) { | |
337 | ret = -ENOMEM; | |
338 | goto exit; | |
339 | } | |
340 | ||
341 | /* Check for the --config option */ | |
342 | ||
343 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
344 | &option_index)) != -1) { | |
345 | if (c == '?') { | |
346 | ret = -EINVAL; | |
347 | goto exit; | |
348 | } else if (c != 'f') { | |
349 | continue; | |
350 | } | |
351 | ||
352 | config_path = utils_expand_path(optarg); | |
353 | if (!config_path) { | |
354 | ERR("Failed to resolve path: %s", optarg); | |
355 | } | |
356 | } | |
357 | ||
358 | ret = config_get_section_entries(config_path, config_section_name, | |
359 | config_entry_handler, NULL); | |
360 | if (ret) { | |
361 | if (ret > 0) { | |
362 | ERR("Invalid configuration option at line %i", ret); | |
363 | ret = -1; | |
364 | } | |
365 | goto exit; | |
366 | } | |
b8aa1682 | 367 | |
cd60b05a JG |
368 | /* Reset getopt's global state */ |
369 | optopt = orig_optopt; | |
370 | optind = orig_optind; | |
b8aa1682 | 371 | while (1) { |
cd60b05a | 372 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
373 | if (c == -1) { |
374 | break; | |
375 | } | |
376 | ||
cd60b05a JG |
377 | ret = set_option(c, optarg, long_options[option_index].name); |
378 | if (ret < 0) { | |
b8aa1682 JD |
379 | goto exit; |
380 | } | |
381 | } | |
382 | ||
383 | /* assign default values */ | |
384 | if (control_uri == NULL) { | |
fa91dc52 MD |
385 | ret = asprintf(&default_address, |
386 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
387 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
388 | if (ret < 0) { |
389 | PERROR("asprintf default data address"); | |
390 | goto exit; | |
391 | } | |
392 | ||
393 | ret = uri_parse(default_address, &control_uri); | |
394 | free(default_address); | |
395 | if (ret < 0) { | |
396 | ERR("Invalid control URI specified"); | |
397 | goto exit; | |
398 | } | |
399 | } | |
400 | if (data_uri == NULL) { | |
fa91dc52 MD |
401 | ret = asprintf(&default_address, |
402 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
403 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
404 | if (ret < 0) { |
405 | PERROR("asprintf default data address"); | |
406 | goto exit; | |
407 | } | |
408 | ||
409 | ret = uri_parse(default_address, &data_uri); | |
410 | free(default_address); | |
411 | if (ret < 0) { | |
412 | ERR("Invalid data URI specified"); | |
413 | goto exit; | |
414 | } | |
415 | } | |
d3e2ba59 | 416 | if (live_uri == NULL) { |
fa91dc52 MD |
417 | ret = asprintf(&default_address, |
418 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
419 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
420 | if (ret < 0) { |
421 | PERROR("asprintf default viewer control address"); | |
422 | goto exit; | |
423 | } | |
424 | ||
425 | ret = uri_parse(default_address, &live_uri); | |
426 | free(default_address); | |
427 | if (ret < 0) { | |
428 | ERR("Invalid viewer control URI specified"); | |
429 | goto exit; | |
430 | } | |
431 | } | |
b8aa1682 JD |
432 | |
433 | exit: | |
cd60b05a | 434 | free(optstring); |
b8aa1682 JD |
435 | return ret; |
436 | } | |
437 | ||
438 | /* | |
439 | * Cleanup the daemon | |
440 | */ | |
441 | static | |
442 | void cleanup(void) | |
443 | { | |
b8aa1682 JD |
444 | DBG("Cleaning up"); |
445 | ||
095a4ae5 MD |
446 | /* free the dynamically allocated opt_output_path */ |
447 | free(opt_output_path); | |
448 | ||
a02de639 CB |
449 | /* Close thread quit pipes */ |
450 | utils_close_pipe(thread_quit_pipe); | |
451 | ||
710c1f73 DG |
452 | uri_free(control_uri); |
453 | uri_free(data_uri); | |
8d5c808e | 454 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
455 | |
456 | if (tracing_group_name_override) { | |
457 | free((void *) tracing_group_name); | |
458 | } | |
b8aa1682 JD |
459 | } |
460 | ||
461 | /* | |
462 | * Write to writable pipe used to notify a thread. | |
463 | */ | |
464 | static | |
465 | int notify_thread_pipe(int wpipe) | |
466 | { | |
6cd525e8 | 467 | ssize_t ret; |
b8aa1682 | 468 | |
6cd525e8 MD |
469 | ret = lttng_write(wpipe, "!", 1); |
470 | if (ret < 1) { | |
b8aa1682 JD |
471 | PERROR("write poll pipe"); |
472 | } | |
473 | ||
474 | return ret; | |
475 | } | |
476 | ||
65931c8b MD |
477 | static void notify_health_quit_pipe(int *pipe) |
478 | { | |
6cd525e8 | 479 | ssize_t ret; |
65931c8b | 480 | |
6cd525e8 MD |
481 | ret = lttng_write(pipe[1], "4", 1); |
482 | if (ret < 1) { | |
65931c8b MD |
483 | PERROR("write relay health quit"); |
484 | } | |
485 | } | |
486 | ||
b8aa1682 JD |
487 | /* |
488 | * Stop all threads by closing the thread quit pipe. | |
489 | */ | |
490 | static | |
491 | void stop_threads(void) | |
492 | { | |
493 | int ret; | |
494 | ||
495 | /* Stopping all threads */ | |
496 | DBG("Terminating all threads"); | |
497 | ret = notify_thread_pipe(thread_quit_pipe[1]); | |
498 | if (ret < 0) { | |
499 | ERR("write error on thread quit pipe"); | |
500 | } | |
501 | ||
65931c8b MD |
502 | notify_health_quit_pipe(health_quit_pipe); |
503 | ||
b8aa1682 | 504 | /* Dispatch thread */ |
26c9d55e | 505 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 506 | futex_nto1_wake(&relay_conn_queue.futex); |
b8aa1682 JD |
507 | } |
508 | ||
509 | /* | |
510 | * Signal handler for the daemon | |
511 | * | |
512 | * Simply stop all worker threads, leaving main() return gracefully after | |
513 | * joining all threads and calling cleanup(). | |
514 | */ | |
515 | static | |
516 | void sighandler(int sig) | |
517 | { | |
518 | switch (sig) { | |
519 | case SIGPIPE: | |
520 | DBG("SIGPIPE caught"); | |
521 | return; | |
522 | case SIGINT: | |
523 | DBG("SIGINT caught"); | |
524 | stop_threads(); | |
525 | break; | |
526 | case SIGTERM: | |
527 | DBG("SIGTERM caught"); | |
528 | stop_threads(); | |
529 | break; | |
3fd27398 MD |
530 | case SIGUSR1: |
531 | CMM_STORE_SHARED(recv_child_signal, 1); | |
532 | break; | |
b8aa1682 JD |
533 | default: |
534 | break; | |
535 | } | |
536 | } | |
537 | ||
538 | /* | |
539 | * Setup signal handler for : | |
540 | * SIGINT, SIGTERM, SIGPIPE | |
541 | */ | |
542 | static | |
543 | int set_signal_handler(void) | |
544 | { | |
545 | int ret = 0; | |
546 | struct sigaction sa; | |
547 | sigset_t sigset; | |
548 | ||
549 | if ((ret = sigemptyset(&sigset)) < 0) { | |
550 | PERROR("sigemptyset"); | |
551 | return ret; | |
552 | } | |
553 | ||
554 | sa.sa_handler = sighandler; | |
555 | sa.sa_mask = sigset; | |
556 | sa.sa_flags = 0; | |
557 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
558 | PERROR("sigaction"); | |
559 | return ret; | |
560 | } | |
561 | ||
562 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
563 | PERROR("sigaction"); | |
564 | return ret; | |
565 | } | |
566 | ||
567 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
568 | PERROR("sigaction"); | |
569 | return ret; | |
570 | } | |
571 | ||
3fd27398 MD |
572 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
573 | PERROR("sigaction"); | |
574 | return ret; | |
575 | } | |
576 | ||
577 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
578 | |
579 | return ret; | |
580 | } | |
581 | ||
3fd27398 MD |
582 | void lttng_relay_notify_ready(void) |
583 | { | |
584 | /* Notify the parent of the fork() process that we are ready. */ | |
585 | if (opt_daemon || opt_background) { | |
586 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
587 | kill(child_ppid, SIGUSR1); | |
588 | } | |
589 | } | |
590 | } | |
591 | ||
b8aa1682 JD |
592 | /* |
593 | * Init thread quit pipe. | |
594 | * | |
595 | * Return -1 on error or 0 if all pipes are created. | |
596 | */ | |
597 | static | |
598 | int init_thread_quit_pipe(void) | |
599 | { | |
a02de639 | 600 | int ret; |
b8aa1682 | 601 | |
a02de639 | 602 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 603 | |
b8aa1682 JD |
604 | return ret; |
605 | } | |
606 | ||
607 | /* | |
608 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
609 | */ | |
610 | static | |
611 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
612 | { | |
613 | int ret; | |
614 | ||
615 | if (events == NULL || size == 0) { | |
616 | ret = -1; | |
617 | goto error; | |
618 | } | |
619 | ||
620 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
621 | if (ret < 0) { | |
622 | goto error; | |
623 | } | |
624 | ||
625 | /* Add quit pipe */ | |
c7759e6a | 626 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
627 | if (ret < 0) { |
628 | goto error; | |
629 | } | |
630 | ||
631 | return 0; | |
632 | ||
633 | error: | |
634 | return ret; | |
635 | } | |
636 | ||
637 | /* | |
638 | * Check if the thread quit pipe was triggered. | |
639 | * | |
640 | * Return 1 if it was triggered else 0; | |
641 | */ | |
642 | static | |
643 | int check_thread_quit_pipe(int fd, uint32_t events) | |
644 | { | |
645 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
646 | return 1; | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
652 | /* | |
653 | * Create and init socket from uri. | |
654 | */ | |
655 | static | |
656 | struct lttcomm_sock *relay_init_sock(struct lttng_uri *uri) | |
657 | { | |
658 | int ret; | |
659 | struct lttcomm_sock *sock = NULL; | |
660 | ||
661 | sock = lttcomm_alloc_sock_from_uri(uri); | |
662 | if (sock == NULL) { | |
663 | ERR("Allocating socket"); | |
664 | goto error; | |
665 | } | |
666 | ||
667 | ret = lttcomm_create_sock(sock); | |
668 | if (ret < 0) { | |
669 | goto error; | |
670 | } | |
671 | DBG("Listening on sock %d", sock->fd); | |
672 | ||
673 | ret = sock->ops->bind(sock); | |
674 | if (ret < 0) { | |
675 | goto error; | |
676 | } | |
677 | ||
678 | ret = sock->ops->listen(sock, -1); | |
679 | if (ret < 0) { | |
680 | goto error; | |
681 | ||
682 | } | |
683 | ||
684 | return sock; | |
685 | ||
686 | error: | |
687 | if (sock) { | |
688 | lttcomm_destroy_sock(sock); | |
689 | } | |
690 | return NULL; | |
691 | } | |
692 | ||
173af62f DG |
693 | /* |
694 | * Return nonzero if stream needs to be closed. | |
695 | */ | |
696 | static | |
697 | int close_stream_check(struct relay_stream *stream) | |
698 | { | |
173af62f | 699 | if (stream->close_flag && stream->prev_seq == stream->last_net_seq_num) { |
f7079f67 DG |
700 | /* |
701 | * We are about to close the stream so set the data pending flag to 1 | |
702 | * which will make the end data pending command skip the stream which | |
703 | * is now closed and ready. Note that after proceeding to a file close, | |
704 | * the written file is ready for reading. | |
705 | */ | |
706 | stream->data_pending_check_done = 1; | |
173af62f DG |
707 | return 1; |
708 | } | |
709 | return 0; | |
710 | } | |
711 | ||
2a174661 DG |
712 | static void try_close_stream(struct relay_session *session, |
713 | struct relay_stream *stream) | |
714 | { | |
715 | int ret; | |
716 | struct ctf_trace *ctf_trace; | |
717 | ||
718 | assert(session); | |
719 | assert(stream); | |
720 | ||
721 | if (!close_stream_check(stream)) { | |
722 | /* Can't close it, not ready for that. */ | |
723 | goto end; | |
724 | } | |
725 | ||
726 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
727 | stream->path_name); | |
728 | assert(ctf_trace); | |
729 | ||
730 | pthread_mutex_lock(&session->viewer_ready_lock); | |
731 | ctf_trace->invalid_flag = 1; | |
732 | pthread_mutex_unlock(&session->viewer_ready_lock); | |
733 | ||
734 | ret = stream_close(session, stream); | |
f94b19e6 | 735 | if (ret || session->snapshot) { |
2a174661 DG |
736 | /* Already close thus the ctf trace is being or has been destroyed. */ |
737 | goto end; | |
738 | } | |
739 | ||
740 | ctf_trace_try_destroy(session, ctf_trace); | |
741 | ||
742 | end: | |
743 | return; | |
744 | } | |
745 | ||
b8aa1682 JD |
746 | /* |
747 | * This thread manages the listening for new connections on the network | |
748 | */ | |
749 | static | |
750 | void *relay_thread_listener(void *data) | |
751 | { | |
095a4ae5 | 752 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
753 | uint32_t revents, nb_fd; |
754 | struct lttng_poll_event events; | |
755 | struct lttcomm_sock *control_sock, *data_sock; | |
756 | ||
b8aa1682 JD |
757 | DBG("[thread] Relay listener started"); |
758 | ||
55706a7d MD |
759 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
760 | ||
f385ae0a MD |
761 | health_code_update(); |
762 | ||
b8aa1682 JD |
763 | control_sock = relay_init_sock(control_uri); |
764 | if (!control_sock) { | |
095a4ae5 | 765 | goto error_sock_control; |
b8aa1682 JD |
766 | } |
767 | ||
768 | data_sock = relay_init_sock(data_uri); | |
769 | if (!data_sock) { | |
095a4ae5 | 770 | goto error_sock_relay; |
b8aa1682 JD |
771 | } |
772 | ||
773 | /* | |
774 | * Pass 3 as size here for the thread quit pipe, control and data socket. | |
775 | */ | |
776 | ret = create_thread_poll_set(&events, 3); | |
777 | if (ret < 0) { | |
778 | goto error_create_poll; | |
779 | } | |
780 | ||
781 | /* Add the control socket */ | |
782 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
783 | if (ret < 0) { | |
784 | goto error_poll_add; | |
785 | } | |
786 | ||
787 | /* Add the data socket */ | |
788 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
789 | if (ret < 0) { | |
790 | goto error_poll_add; | |
791 | } | |
792 | ||
3fd27398 MD |
793 | lttng_relay_notify_ready(); |
794 | ||
9b5e0863 MD |
795 | if (testpoint(relayd_thread_listener)) { |
796 | goto error_testpoint; | |
797 | } | |
798 | ||
b8aa1682 | 799 | while (1) { |
f385ae0a MD |
800 | health_code_update(); |
801 | ||
b8aa1682 JD |
802 | DBG("Listener accepting connections"); |
803 | ||
b8aa1682 | 804 | restart: |
f385ae0a | 805 | health_poll_entry(); |
b8aa1682 | 806 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 807 | health_poll_exit(); |
b8aa1682 JD |
808 | if (ret < 0) { |
809 | /* | |
810 | * Restart interrupted system call. | |
811 | */ | |
812 | if (errno == EINTR) { | |
813 | goto restart; | |
814 | } | |
815 | goto error; | |
816 | } | |
817 | ||
0d9c5d77 DG |
818 | nb_fd = ret; |
819 | ||
b8aa1682 JD |
820 | DBG("Relay new connection received"); |
821 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
822 | health_code_update(); |
823 | ||
b8aa1682 JD |
824 | /* Fetch once the poll data */ |
825 | revents = LTTNG_POLL_GETEV(&events, i); | |
826 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
827 | ||
828 | /* Thread quit pipe has been closed. Killing thread. */ | |
829 | ret = check_thread_quit_pipe(pollfd, revents); | |
830 | if (ret) { | |
095a4ae5 MD |
831 | err = 0; |
832 | goto exit; | |
b8aa1682 JD |
833 | } |
834 | ||
835 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
836 | ERR("socket poll error"); | |
837 | goto error; | |
838 | } else if (revents & LPOLLIN) { | |
4b7f17b2 | 839 | /* |
58eb9381 DG |
840 | * Get allocated in this thread, enqueued to a global queue, |
841 | * dequeued and freed in the worker thread. | |
4b7f17b2 | 842 | */ |
58eb9381 DG |
843 | int val = 1; |
844 | struct relay_connection *new_conn; | |
4b7f17b2 | 845 | struct lttcomm_sock *newsock; |
b8aa1682 | 846 | |
58eb9381 DG |
847 | new_conn = connection_create(); |
848 | if (!new_conn) { | |
b8aa1682 JD |
849 | goto error; |
850 | } | |
851 | ||
852 | if (pollfd == data_sock->fd) { | |
58eb9381 | 853 | new_conn->type = RELAY_DATA; |
b8aa1682 | 854 | newsock = data_sock->ops->accept(data_sock); |
58eb9381 DG |
855 | DBG("Relay data connection accepted, socket %d", |
856 | newsock->fd); | |
4b7f17b2 MD |
857 | } else { |
858 | assert(pollfd == control_sock->fd); | |
58eb9381 | 859 | new_conn->type = RELAY_CONTROL; |
b8aa1682 | 860 | newsock = control_sock->ops->accept(control_sock); |
58eb9381 DG |
861 | DBG("Relay control connection accepted, socket %d", |
862 | newsock->fd); | |
b8aa1682 | 863 | } |
58eb9381 DG |
864 | if (!newsock) { |
865 | PERROR("accepting sock"); | |
866 | connection_free(new_conn); | |
867 | goto error; | |
868 | } | |
869 | ||
870 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
871 | sizeof(val)); | |
b8aa1682 JD |
872 | if (ret < 0) { |
873 | PERROR("setsockopt inet"); | |
4b7f17b2 | 874 | lttcomm_destroy_sock(newsock); |
58eb9381 | 875 | connection_free(new_conn); |
b8aa1682 JD |
876 | goto error; |
877 | } | |
58eb9381 DG |
878 | new_conn->sock = newsock; |
879 | ||
880 | /* Enqueue request for the dispatcher thread. */ | |
881 | cds_wfq_enqueue(&relay_conn_queue.queue, &new_conn->qnode); | |
b8aa1682 JD |
882 | |
883 | /* | |
58eb9381 DG |
884 | * Wake the dispatch queue futex. Implicit memory barrier with |
885 | * the exchange in cds_wfq_enqueue. | |
b8aa1682 | 886 | */ |
58eb9381 | 887 | futex_nto1_wake(&relay_conn_queue.futex); |
b8aa1682 JD |
888 | } |
889 | } | |
890 | } | |
891 | ||
095a4ae5 | 892 | exit: |
b8aa1682 JD |
893 | error: |
894 | error_poll_add: | |
9b5e0863 | 895 | error_testpoint: |
b8aa1682 JD |
896 | lttng_poll_clean(&events); |
897 | error_create_poll: | |
095a4ae5 MD |
898 | if (data_sock->fd >= 0) { |
899 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
900 | if (ret) { |
901 | PERROR("close"); | |
902 | } | |
b8aa1682 | 903 | } |
095a4ae5 MD |
904 | lttcomm_destroy_sock(data_sock); |
905 | error_sock_relay: | |
906 | if (control_sock->fd >= 0) { | |
907 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
908 | if (ret) { |
909 | PERROR("close"); | |
910 | } | |
b8aa1682 | 911 | } |
095a4ae5 MD |
912 | lttcomm_destroy_sock(control_sock); |
913 | error_sock_control: | |
914 | if (err) { | |
f385ae0a MD |
915 | health_error(); |
916 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 917 | } |
55706a7d | 918 | health_unregister(health_relayd); |
b8aa1682 JD |
919 | DBG("Relay listener thread cleanup complete"); |
920 | stop_threads(); | |
b8aa1682 JD |
921 | return NULL; |
922 | } | |
923 | ||
924 | /* | |
925 | * This thread manages the dispatching of the requests to worker threads | |
926 | */ | |
927 | static | |
928 | void *relay_thread_dispatcher(void *data) | |
929 | { | |
6cd525e8 MD |
930 | int err = -1; |
931 | ssize_t ret; | |
b8aa1682 | 932 | struct cds_wfq_node *node; |
58eb9381 | 933 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
934 | |
935 | DBG("[thread] Relay dispatcher started"); | |
936 | ||
55706a7d MD |
937 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
938 | ||
9b5e0863 MD |
939 | if (testpoint(relayd_thread_dispatcher)) { |
940 | goto error_testpoint; | |
941 | } | |
942 | ||
f385ae0a MD |
943 | health_code_update(); |
944 | ||
26c9d55e | 945 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
f385ae0a MD |
946 | health_code_update(); |
947 | ||
b8aa1682 | 948 | /* Atomically prepare the queue futex */ |
58eb9381 | 949 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 JD |
950 | |
951 | do { | |
f385ae0a MD |
952 | health_code_update(); |
953 | ||
b8aa1682 | 954 | /* Dequeue commands */ |
58eb9381 | 955 | node = cds_wfq_dequeue_blocking(&relay_conn_queue.queue); |
b8aa1682 JD |
956 | if (node == NULL) { |
957 | DBG("Woken up but nothing in the relay command queue"); | |
958 | /* Continue thread execution */ | |
959 | break; | |
960 | } | |
58eb9381 | 961 | new_conn = caa_container_of(node, struct relay_connection, qnode); |
b8aa1682 | 962 | |
58eb9381 | 963 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
964 | |
965 | /* | |
58eb9381 DG |
966 | * Inform worker thread of the new request. This call is blocking |
967 | * so we can be assured that the data will be read at some point in | |
968 | * time or wait to the end of the world :) | |
b8aa1682 | 969 | */ |
58eb9381 DG |
970 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
971 | if (ret < 0) { | |
972 | PERROR("write connection pipe"); | |
973 | connection_destroy(new_conn); | |
b8aa1682 JD |
974 | goto error; |
975 | } | |
976 | } while (node != NULL); | |
977 | ||
978 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 979 | health_poll_entry(); |
58eb9381 | 980 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 981 | health_poll_exit(); |
b8aa1682 JD |
982 | } |
983 | ||
f385ae0a MD |
984 | /* Normal exit, no error */ |
985 | err = 0; | |
986 | ||
b8aa1682 | 987 | error: |
9b5e0863 | 988 | error_testpoint: |
f385ae0a MD |
989 | if (err) { |
990 | health_error(); | |
991 | ERR("Health error occurred in %s", __func__); | |
992 | } | |
55706a7d | 993 | health_unregister(health_relayd); |
b8aa1682 JD |
994 | DBG("Dispatch thread dying"); |
995 | stop_threads(); | |
996 | return NULL; | |
997 | } | |
998 | ||
2a174661 | 999 | static void try_close_streams(struct relay_session *session) |
d3e2ba59 | 1000 | { |
2a174661 | 1001 | struct ctf_trace *ctf_trace; |
94d49140 JD |
1002 | struct lttng_ht_iter iter; |
1003 | ||
2a174661 | 1004 | assert(session); |
94d49140 | 1005 | |
2a174661 DG |
1006 | pthread_mutex_lock(&session->viewer_ready_lock); |
1007 | rcu_read_lock(); | |
1008 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
1009 | node.node) { | |
1010 | struct relay_stream *stream; | |
94d49140 | 1011 | |
2a174661 DG |
1012 | /* Close streams. */ |
1013 | cds_list_for_each_entry(stream, &ctf_trace->stream_list, trace_list) { | |
1014 | stream_close(session, stream); | |
94d49140 | 1015 | } |
94d49140 | 1016 | |
2a174661 DG |
1017 | ctf_trace->invalid_flag = 1; |
1018 | ctf_trace_try_destroy(session, ctf_trace); | |
157df586 | 1019 | } |
2a174661 DG |
1020 | rcu_read_unlock(); |
1021 | pthread_mutex_unlock(&session->viewer_ready_lock); | |
94d49140 JD |
1022 | } |
1023 | ||
b8aa1682 | 1024 | /* |
2a174661 | 1025 | * Try to destroy a session within a connection. |
b8aa1682 | 1026 | */ |
58eb9381 | 1027 | static void destroy_session(struct relay_session *session, |
d3e2ba59 | 1028 | struct lttng_ht *sessions_ht) |
b8aa1682 | 1029 | { |
58eb9381 | 1030 | assert(session); |
2a174661 | 1031 | assert(sessions_ht); |
b8aa1682 | 1032 | |
2a174661 | 1033 | /* Indicate that this session can be destroyed from now on. */ |
58eb9381 | 1034 | session->close_flag = 1; |
b8aa1682 | 1035 | |
58eb9381 | 1036 | try_close_streams(session); |
5b6d8097 | 1037 | |
2a174661 DG |
1038 | /* |
1039 | * This will try to delete and destroy the session if no viewer is attached | |
1040 | * to it meaning the refcount is down to zero. | |
1041 | */ | |
58eb9381 | 1042 | session_try_destroy(sessions_ht, session); |
b8aa1682 JD |
1043 | } |
1044 | ||
1c20f0e2 JD |
1045 | /* |
1046 | * Copy index data from the control port to a given index object. | |
1047 | */ | |
1048 | static void copy_index_control_data(struct relay_index *index, | |
1049 | struct lttcomm_relayd_index *data) | |
1050 | { | |
1051 | assert(index); | |
1052 | assert(data); | |
1053 | ||
1054 | /* | |
1055 | * The index on disk is encoded in big endian, so we don't need to convert | |
1056 | * the data received on the network. The data_offset value is NEVER | |
1057 | * modified here and is updated by the data thread. | |
1058 | */ | |
1059 | index->index_data.packet_size = data->packet_size; | |
1060 | index->index_data.content_size = data->content_size; | |
1061 | index->index_data.timestamp_begin = data->timestamp_begin; | |
1062 | index->index_data.timestamp_end = data->timestamp_end; | |
1063 | index->index_data.events_discarded = data->events_discarded; | |
1064 | index->index_data.stream_id = data->stream_id; | |
1065 | } | |
1066 | ||
c5b6f4f0 DG |
1067 | /* |
1068 | * Handle the RELAYD_CREATE_SESSION command. | |
1069 | * | |
1070 | * On success, send back the session id or else return a negative value. | |
1071 | */ | |
1072 | static | |
1073 | int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1074 | struct relay_connection *conn) |
c5b6f4f0 DG |
1075 | { |
1076 | int ret = 0, send_ret; | |
1077 | struct relay_session *session; | |
1078 | struct lttcomm_relayd_status_session reply; | |
1079 | ||
1080 | assert(recv_hdr); | |
58eb9381 | 1081 | assert(conn); |
c5b6f4f0 DG |
1082 | |
1083 | memset(&reply, 0, sizeof(reply)); | |
1084 | ||
2a174661 DG |
1085 | session = session_create(); |
1086 | if (!session) { | |
c5b6f4f0 DG |
1087 | ret = -1; |
1088 | goto error; | |
1089 | } | |
58eb9381 DG |
1090 | session->minor = conn->minor; |
1091 | session->major = conn->major; | |
1092 | conn->session_id = session->id; | |
1093 | conn->session = session; | |
c5b6f4f0 DG |
1094 | |
1095 | reply.session_id = htobe64(session->id); | |
1096 | ||
58eb9381 | 1097 | switch (conn->minor) { |
2a174661 DG |
1098 | case 1: |
1099 | case 2: | |
1100 | case 3: | |
1101 | break; | |
1102 | case 4: /* LTTng sessiond 2.4 */ | |
1103 | default: | |
58eb9381 | 1104 | ret = cmd_create_session_2_4(conn, session); |
d3e2ba59 JD |
1105 | } |
1106 | ||
58eb9381 | 1107 | lttng_ht_add_unique_u64(conn->sessions_ht, &session->session_n); |
c5b6f4f0 DG |
1108 | DBG("Created session %" PRIu64, session->id); |
1109 | ||
1110 | error: | |
1111 | if (ret < 0) { | |
1112 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
1113 | } else { | |
1114 | reply.ret_code = htobe32(LTTNG_OK); | |
1115 | } | |
1116 | ||
58eb9381 | 1117 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c5b6f4f0 DG |
1118 | if (send_ret < 0) { |
1119 | ERR("Relayd sending session id"); | |
4169f5ad | 1120 | ret = send_ret; |
c5b6f4f0 DG |
1121 | } |
1122 | ||
1123 | return ret; | |
1124 | } | |
1125 | ||
a4baae1b JD |
1126 | /* |
1127 | * When we have received all the streams and the metadata for a channel, | |
1128 | * we make them visible to the viewer threads. | |
1129 | */ | |
1130 | static | |
58eb9381 | 1131 | void set_viewer_ready_flag(struct relay_connection *conn) |
a4baae1b | 1132 | { |
2a174661 | 1133 | struct relay_stream *stream, *tmp_stream; |
a4baae1b | 1134 | |
58eb9381 DG |
1135 | pthread_mutex_lock(&conn->session->viewer_ready_lock); |
1136 | cds_list_for_each_entry_safe(stream, tmp_stream, &conn->recv_head, | |
2a174661 | 1137 | recv_list) { |
a4baae1b | 1138 | stream->viewer_ready = 1; |
2a174661 | 1139 | cds_list_del(&stream->recv_list); |
a4baae1b | 1140 | } |
58eb9381 | 1141 | pthread_mutex_unlock(&conn->session->viewer_ready_lock); |
a4baae1b JD |
1142 | return; |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * Add a recv handle node to the connection recv list with the given stream | |
1147 | * handle. A new node is allocated thus must be freed when the node is deleted | |
1148 | * from the list. | |
1149 | */ | |
58eb9381 DG |
1150 | static void queue_stream(struct relay_stream *stream, |
1151 | struct relay_connection *conn) | |
a4baae1b | 1152 | { |
58eb9381 | 1153 | assert(conn); |
2a174661 | 1154 | assert(stream); |
a4baae1b | 1155 | |
58eb9381 | 1156 | cds_list_add(&stream->recv_list, &conn->recv_head); |
a4baae1b JD |
1157 | } |
1158 | ||
b8aa1682 JD |
1159 | /* |
1160 | * relay_add_stream: allocate a new stream for a session | |
1161 | */ | |
1162 | static | |
1163 | int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1164 | struct relay_connection *conn) |
b8aa1682 | 1165 | { |
2a174661 | 1166 | int ret, send_ret; |
58eb9381 | 1167 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1168 | struct relay_stream *stream = NULL; |
1169 | struct lttcomm_relayd_status_stream reply; | |
2a174661 | 1170 | struct ctf_trace *trace; |
b8aa1682 | 1171 | |
58eb9381 | 1172 | if (!session || conn->version_check_done == 0) { |
b8aa1682 JD |
1173 | ERR("Trying to add a stream before version check"); |
1174 | ret = -1; | |
1175 | goto end_no_session; | |
1176 | } | |
1177 | ||
b8aa1682 JD |
1178 | stream = zmalloc(sizeof(struct relay_stream)); |
1179 | if (stream == NULL) { | |
1180 | PERROR("relay stream zmalloc"); | |
1181 | ret = -1; | |
1182 | goto end_no_session; | |
1183 | } | |
1184 | ||
58eb9381 | 1185 | switch (conn->minor) { |
0f907de1 | 1186 | case 1: /* LTTng sessiond 2.1 */ |
58eb9381 | 1187 | ret = cmd_recv_stream_2_1(conn, stream); |
0f907de1 JD |
1188 | break; |
1189 | case 2: /* LTTng sessiond 2.2 */ | |
1190 | default: | |
58eb9381 | 1191 | ret = cmd_recv_stream_2_2(conn, stream); |
0f907de1 JD |
1192 | break; |
1193 | } | |
1194 | if (ret < 0) { | |
1195 | goto err_free_stream; | |
1196 | } | |
1197 | ||
9d1bbf21 | 1198 | rcu_read_lock(); |
b8aa1682 | 1199 | stream->stream_handle = ++last_relay_stream_id; |
173af62f | 1200 | stream->prev_seq = -1ULL; |
2a174661 | 1201 | stream->session_id = session->id; |
1c20f0e2 | 1202 | stream->index_fd = -1; |
d3e2ba59 | 1203 | stream->read_index_fd = -1; |
2a174661 | 1204 | lttng_ht_node_init_u64(&stream->node, stream->stream_handle); |
d3e2ba59 | 1205 | pthread_mutex_init(&stream->lock, NULL); |
b8aa1682 | 1206 | |
0f907de1 | 1207 | ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG); |
b8aa1682 | 1208 | if (ret < 0) { |
b8aa1682 JD |
1209 | ERR("relay creating output directory"); |
1210 | goto end; | |
1211 | } | |
1212 | ||
be96a7d1 DG |
1213 | /* |
1214 | * No need to use run_as API here because whatever we receives, the relayd | |
1215 | * uses its own credentials for the stream files. | |
1216 | */ | |
0f907de1 | 1217 | ret = utils_create_stream_file(stream->path_name, stream->channel_name, |
1c20f0e2 | 1218 | stream->tracefile_size, 0, relayd_uid, relayd_gid, NULL); |
b8aa1682 | 1219 | if (ret < 0) { |
0f907de1 | 1220 | ERR("Create output file"); |
b8aa1682 JD |
1221 | goto end; |
1222 | } | |
b8aa1682 | 1223 | stream->fd = ret; |
0f907de1 JD |
1224 | if (stream->tracefile_size) { |
1225 | DBG("Tracefile %s/%s_0 created", stream->path_name, stream->channel_name); | |
1226 | } else { | |
1227 | DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name); | |
1228 | } | |
b8aa1682 | 1229 | |
2a174661 DG |
1230 | trace = ctf_trace_find_by_path(session->ctf_traces_ht, stream->path_name); |
1231 | if (!trace) { | |
1232 | trace = ctf_trace_create(stream->path_name); | |
1233 | if (!trace) { | |
d3e2ba59 JD |
1234 | ret = -1; |
1235 | goto end; | |
1236 | } | |
2a174661 DG |
1237 | ctf_trace_add(session->ctf_traces_ht, trace); |
1238 | } | |
1239 | ctf_trace_get_ref(trace); | |
1240 | ||
1241 | if (!strncmp(stream->channel_name, DEFAULT_METADATA_NAME, NAME_MAX)) { | |
1242 | stream->metadata_flag = 1; | |
1243 | /* Assign quick reference to the metadata stream in the trace. */ | |
1244 | trace->metadata_stream = stream; | |
d3e2ba59 | 1245 | } |
d3e2ba59 | 1246 | |
a4baae1b | 1247 | /* |
2a174661 DG |
1248 | * Add the stream in the recv list of the connection. Once the end stream |
1249 | * message is received, this list is emptied and streams are set with the | |
1250 | * viewer ready flag. | |
a4baae1b | 1251 | */ |
58eb9381 | 1252 | queue_stream(stream, conn); |
a4baae1b | 1253 | |
2a174661 DG |
1254 | /* |
1255 | * Both in the ctf_trace object and the global stream ht since the data | |
1256 | * side of the relayd does not have the concept of session. | |
1257 | */ | |
1258 | lttng_ht_add_unique_u64(relay_streams_ht, &stream->node); | |
1259 | cds_list_add_tail(&stream->trace_list, &trace->stream_list); | |
b8aa1682 | 1260 | |
87b576ec | 1261 | session->stream_count++; |
d3e2ba59 | 1262 | |
1c20f0e2 JD |
1263 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
1264 | stream->stream_handle); | |
b8aa1682 JD |
1265 | |
1266 | end: | |
53efb85a | 1267 | memset(&reply, 0, sizeof(reply)); |
5af40280 | 1268 | reply.handle = htobe64(stream->stream_handle); |
b8aa1682 JD |
1269 | /* send the session id to the client or a negative return code on error */ |
1270 | if (ret < 0) { | |
f73fabfd | 1271 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5af40280 CB |
1272 | /* stream was not properly added to the ht, so free it */ |
1273 | free(stream); | |
b8aa1682 | 1274 | } else { |
f73fabfd | 1275 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1276 | } |
5af40280 | 1277 | |
58eb9381 | 1278 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1279 | sizeof(struct lttcomm_relayd_status_stream), 0); |
1280 | if (send_ret < 0) { | |
1281 | ERR("Relay sending stream id"); | |
4169f5ad | 1282 | ret = send_ret; |
b8aa1682 | 1283 | } |
9d1bbf21 | 1284 | rcu_read_unlock(); |
b8aa1682 JD |
1285 | |
1286 | end_no_session: | |
1287 | return ret; | |
0f907de1 JD |
1288 | |
1289 | err_free_stream: | |
1290 | free(stream->path_name); | |
1291 | free(stream->channel_name); | |
1292 | free(stream); | |
1293 | return ret; | |
b8aa1682 JD |
1294 | } |
1295 | ||
173af62f DG |
1296 | /* |
1297 | * relay_close_stream: close a specific stream | |
1298 | */ | |
1299 | static | |
1300 | int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1301 | struct relay_connection *conn) |
173af62f | 1302 | { |
94d49140 | 1303 | int ret, send_ret; |
58eb9381 | 1304 | struct relay_session *session = conn->session; |
173af62f DG |
1305 | struct lttcomm_relayd_close_stream stream_info; |
1306 | struct lttcomm_relayd_generic_reply reply; | |
1307 | struct relay_stream *stream; | |
173af62f DG |
1308 | |
1309 | DBG("Close stream received"); | |
1310 | ||
58eb9381 | 1311 | if (!session || conn->version_check_done == 0) { |
173af62f DG |
1312 | ERR("Trying to close a stream before version check"); |
1313 | ret = -1; | |
1314 | goto end_no_session; | |
1315 | } | |
1316 | ||
58eb9381 | 1317 | ret = conn->sock->ops->recvmsg(conn->sock, &stream_info, |
7c5aef62 | 1318 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f | 1319 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
a6cd2b97 DG |
1320 | if (ret == 0) { |
1321 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1322 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1323 | } else { |
1324 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
1325 | } | |
173af62f DG |
1326 | ret = -1; |
1327 | goto end_no_session; | |
1328 | } | |
1329 | ||
1330 | rcu_read_lock(); | |
2a174661 DG |
1331 | stream = stream_find_by_id(relay_streams_ht, |
1332 | be64toh(stream_info.stream_id)); | |
173af62f DG |
1333 | if (!stream) { |
1334 | ret = -1; | |
1335 | goto end_unlock; | |
1336 | } | |
1337 | ||
8e2583a4 | 1338 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
173af62f | 1339 | stream->close_flag = 1; |
87b576ec JD |
1340 | session->stream_count--; |
1341 | assert(session->stream_count >= 0); | |
173af62f | 1342 | |
2a174661 DG |
1343 | /* Check if we can close it or else the data will do it. */ |
1344 | try_close_stream(session, stream); | |
173af62f DG |
1345 | |
1346 | end_unlock: | |
1347 | rcu_read_unlock(); | |
1348 | ||
53efb85a | 1349 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1350 | if (ret < 0) { |
f73fabfd | 1351 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1352 | } else { |
f73fabfd | 1353 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1354 | } |
58eb9381 | 1355 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f DG |
1356 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1357 | if (send_ret < 0) { | |
1358 | ERR("Relay sending stream id"); | |
4169f5ad | 1359 | ret = send_ret; |
173af62f DG |
1360 | } |
1361 | ||
1362 | end_no_session: | |
1363 | return ret; | |
1364 | } | |
1365 | ||
b8aa1682 JD |
1366 | /* |
1367 | * relay_unknown_command: send -1 if received unknown command | |
1368 | */ | |
1369 | static | |
58eb9381 | 1370 | void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1371 | { |
1372 | struct lttcomm_relayd_generic_reply reply; | |
1373 | int ret; | |
1374 | ||
53efb85a | 1375 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1376 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1377 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1378 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1379 | if (ret < 0) { | |
1380 | ERR("Relay sending unknown command"); | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* | |
1385 | * relay_start: send an acknowledgment to the client to tell if we are | |
1386 | * ready to receive data. We are ready if a session is established. | |
1387 | */ | |
1388 | static | |
1389 | int relay_start(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1390 | struct relay_connection *conn) |
b8aa1682 | 1391 | { |
f73fabfd | 1392 | int ret = htobe32(LTTNG_OK); |
b8aa1682 | 1393 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1394 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1395 | |
1396 | if (!session) { | |
1397 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1398 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1399 | } |
1400 | ||
53efb85a | 1401 | memset(&reply, 0, sizeof(reply)); |
b8aa1682 | 1402 | reply.ret_code = ret; |
58eb9381 | 1403 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1404 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1405 | if (ret < 0) { | |
1406 | ERR("Relay sending start ack"); | |
1407 | } | |
1408 | ||
1409 | return ret; | |
1410 | } | |
1411 | ||
1d4dfdef DG |
1412 | /* |
1413 | * Append padding to the file pointed by the file descriptor fd. | |
1414 | */ | |
1415 | static int write_padding_to_file(int fd, uint32_t size) | |
1416 | { | |
6cd525e8 | 1417 | ssize_t ret = 0; |
1d4dfdef DG |
1418 | char *zeros; |
1419 | ||
1420 | if (size == 0) { | |
1421 | goto end; | |
1422 | } | |
1423 | ||
1424 | zeros = zmalloc(size); | |
1425 | if (zeros == NULL) { | |
1426 | PERROR("zmalloc zeros for padding"); | |
1427 | ret = -1; | |
1428 | goto end; | |
1429 | } | |
1430 | ||
6cd525e8 MD |
1431 | ret = lttng_write(fd, zeros, size); |
1432 | if (ret < size) { | |
1d4dfdef DG |
1433 | PERROR("write padding to file"); |
1434 | } | |
1435 | ||
e986c7a1 DG |
1436 | free(zeros); |
1437 | ||
1d4dfdef DG |
1438 | end: |
1439 | return ret; | |
1440 | } | |
1441 | ||
b8aa1682 JD |
1442 | /* |
1443 | * relay_recv_metadata: receive the metada for the session. | |
1444 | */ | |
1445 | static | |
1446 | int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1447 | struct relay_connection *conn) |
b8aa1682 | 1448 | { |
f73fabfd | 1449 | int ret = htobe32(LTTNG_OK); |
6cd525e8 | 1450 | ssize_t size_ret; |
58eb9381 | 1451 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1452 | struct lttcomm_relayd_metadata_payload *metadata_struct; |
1453 | struct relay_stream *metadata_stream; | |
1454 | uint64_t data_size, payload_size; | |
2a174661 | 1455 | struct ctf_trace *ctf_trace; |
b8aa1682 JD |
1456 | |
1457 | if (!session) { | |
1458 | ERR("Metadata sent before version check"); | |
1459 | ret = -1; | |
1460 | goto end; | |
1461 | } | |
1462 | ||
f6416125 MD |
1463 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1464 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1465 | ERR("Incorrect data size"); | |
1466 | ret = -1; | |
1467 | goto end; | |
1468 | } | |
1469 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1470 | ||
b8aa1682 | 1471 | if (data_buffer_size < data_size) { |
d7b3776f | 1472 | /* In case the realloc fails, we can free the memory */ |
c617c0c6 MD |
1473 | char *tmp_data_ptr; |
1474 | ||
1475 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1476 | if (!tmp_data_ptr) { | |
b8aa1682 | 1477 | ERR("Allocating data buffer"); |
c617c0c6 | 1478 | free(data_buffer); |
b8aa1682 JD |
1479 | ret = -1; |
1480 | goto end; | |
1481 | } | |
c617c0c6 | 1482 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1483 | data_buffer_size = data_size; |
1484 | } | |
1485 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1486 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
58eb9381 | 1487 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0); |
b8aa1682 | 1488 | if (ret < 0 || ret != data_size) { |
a6cd2b97 DG |
1489 | if (ret == 0) { |
1490 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1491 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1492 | } else { |
1493 | ERR("Relay didn't receive the whole metadata"); | |
1494 | } | |
b8aa1682 | 1495 | ret = -1; |
b8aa1682 JD |
1496 | goto end; |
1497 | } | |
1498 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 MD |
1499 | |
1500 | rcu_read_lock(); | |
2a174661 | 1501 | metadata_stream = stream_find_by_id(relay_streams_ht, |
d3e2ba59 | 1502 | be64toh(metadata_struct->stream_id)); |
b8aa1682 JD |
1503 | if (!metadata_stream) { |
1504 | ret = -1; | |
9d1bbf21 | 1505 | goto end_unlock; |
b8aa1682 JD |
1506 | } |
1507 | ||
6cd525e8 MD |
1508 | size_ret = lttng_write(metadata_stream->fd, metadata_struct->payload, |
1509 | payload_size); | |
1510 | if (size_ret < payload_size) { | |
b8aa1682 JD |
1511 | ERR("Relay error writing metadata on file"); |
1512 | ret = -1; | |
9d1bbf21 | 1513 | goto end_unlock; |
b8aa1682 | 1514 | } |
1d4dfdef DG |
1515 | |
1516 | ret = write_padding_to_file(metadata_stream->fd, | |
1517 | be32toh(metadata_struct->padding_size)); | |
1518 | if (ret < 0) { | |
1519 | goto end_unlock; | |
1520 | } | |
2a174661 DG |
1521 | |
1522 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
1523 | metadata_stream->path_name); | |
1524 | assert(ctf_trace); | |
1525 | ctf_trace->metadata_received += | |
d3e2ba59 | 1526 | payload_size + be32toh(metadata_struct->padding_size); |
1d4dfdef | 1527 | |
b8aa1682 JD |
1528 | DBG2("Relay metadata written"); |
1529 | ||
9d1bbf21 | 1530 | end_unlock: |
6e3c5836 | 1531 | rcu_read_unlock(); |
b8aa1682 JD |
1532 | end: |
1533 | return ret; | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * relay_send_version: send relayd version number | |
1538 | */ | |
1539 | static | |
1540 | int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1541 | struct relay_connection *conn) |
b8aa1682 | 1542 | { |
7f51dcba | 1543 | int ret; |
092b6259 | 1544 | struct lttcomm_relayd_version reply, msg; |
b8aa1682 | 1545 | |
58eb9381 | 1546 | assert(conn); |
c5b6f4f0 | 1547 | |
58eb9381 | 1548 | conn->version_check_done = 1; |
b8aa1682 | 1549 | |
092b6259 | 1550 | /* Get version from the other side. */ |
58eb9381 | 1551 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
092b6259 | 1552 | if (ret < 0 || ret != sizeof(msg)) { |
a6cd2b97 DG |
1553 | if (ret == 0) { |
1554 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1555 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1556 | } else { |
1557 | ERR("Relay failed to receive the version values."); | |
1558 | } | |
092b6259 | 1559 | ret = -1; |
092b6259 DG |
1560 | goto end; |
1561 | } | |
1562 | ||
53efb85a | 1563 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
1564 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1565 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1566 | |
1567 | /* Major versions must be the same */ | |
1568 | if (reply.major != be32toh(msg.major)) { | |
6151a90f JD |
1569 | DBG("Incompatible major versions (%u vs %u), deleting session", |
1570 | reply.major, be32toh(msg.major)); | |
58eb9381 | 1571 | destroy_session(conn->session, conn->sessions_ht); |
d4519fa3 JD |
1572 | ret = 0; |
1573 | goto end; | |
1574 | } | |
1575 | ||
58eb9381 | 1576 | conn->major = reply.major; |
0f907de1 JD |
1577 | /* We adapt to the lowest compatible version */ |
1578 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 1579 | conn->minor = reply.minor; |
0f907de1 | 1580 | } else { |
58eb9381 | 1581 | conn->minor = be32toh(msg.minor); |
0f907de1 JD |
1582 | } |
1583 | ||
6151a90f JD |
1584 | reply.major = htobe32(reply.major); |
1585 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 1586 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
6151a90f JD |
1587 | sizeof(struct lttcomm_relayd_version), 0); |
1588 | if (ret < 0) { | |
1589 | ERR("Relay sending version"); | |
1590 | } | |
1591 | ||
58eb9381 DG |
1592 | DBG("Version check done using protocol %u.%u", conn->major, |
1593 | conn->minor); | |
b8aa1682 JD |
1594 | |
1595 | end: | |
1596 | return ret; | |
1597 | } | |
1598 | ||
c8f59ee5 | 1599 | /* |
6d805429 | 1600 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 DG |
1601 | */ |
1602 | static | |
6d805429 | 1603 | int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1604 | struct relay_connection *conn) |
c8f59ee5 | 1605 | { |
58eb9381 | 1606 | struct relay_session *session = conn->session; |
6d805429 | 1607 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1608 | struct lttcomm_relayd_generic_reply reply; |
1609 | struct relay_stream *stream; | |
1610 | int ret; | |
c8f59ee5 DG |
1611 | uint64_t last_net_seq_num, stream_id; |
1612 | ||
6d805429 | 1613 | DBG("Data pending command received"); |
c8f59ee5 | 1614 | |
58eb9381 | 1615 | if (!session || conn->version_check_done == 0) { |
c8f59ee5 DG |
1616 | ERR("Trying to check for data before version check"); |
1617 | ret = -1; | |
1618 | goto end_no_session; | |
1619 | } | |
1620 | ||
58eb9381 | 1621 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1622 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1623 | if (ret == 0) { |
1624 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1625 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1626 | } else { |
1627 | ERR("Relay didn't receive valid data_pending struct size : %d", | |
1628 | ret); | |
1629 | } | |
c8f59ee5 DG |
1630 | ret = -1; |
1631 | goto end_no_session; | |
1632 | } | |
1633 | ||
1634 | stream_id = be64toh(msg.stream_id); | |
1635 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1636 | ||
1637 | rcu_read_lock(); | |
2a174661 | 1638 | stream = stream_find_by_id(relay_streams_ht, stream_id); |
de91f48a | 1639 | if (stream == NULL) { |
c8f59ee5 DG |
1640 | ret = -1; |
1641 | goto end_unlock; | |
1642 | } | |
1643 | ||
6d805429 | 1644 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1645 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1646 | last_net_seq_num); | |
1647 | ||
33832e64 | 1648 | /* Avoid wrapping issue */ |
39df6d9f | 1649 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) >= 0) { |
6d805429 | 1650 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1651 | ret = 0; |
6d805429 DG |
1652 | } else { |
1653 | /* Data still being streamed thus pending */ | |
1654 | ret = 1; | |
c8f59ee5 DG |
1655 | } |
1656 | ||
f7079f67 DG |
1657 | /* Pending check is now done. */ |
1658 | stream->data_pending_check_done = 1; | |
1659 | ||
c8f59ee5 DG |
1660 | end_unlock: |
1661 | rcu_read_unlock(); | |
1662 | ||
53efb85a | 1663 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1664 | reply.ret_code = htobe32(ret); |
58eb9381 | 1665 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1666 | if (ret < 0) { |
6d805429 | 1667 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1668 | } |
1669 | ||
1670 | end_no_session: | |
1671 | return ret; | |
1672 | } | |
1673 | ||
1674 | /* | |
1675 | * Wait for the control socket to reach a quiescent state. | |
1676 | * | |
1677 | * Note that for now, when receiving this command from the session daemon, this | |
1678 | * means that every subsequent commands or data received on the control socket | |
1679 | * has been handled. So, this is why we simply return OK here. | |
1680 | */ | |
1681 | static | |
1682 | int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1683 | struct relay_connection *conn) |
c8f59ee5 DG |
1684 | { |
1685 | int ret; | |
ad7051c0 DG |
1686 | uint64_t stream_id; |
1687 | struct relay_stream *stream; | |
1688 | struct lttng_ht_iter iter; | |
1689 | struct lttcomm_relayd_quiescent_control msg; | |
c8f59ee5 DG |
1690 | struct lttcomm_relayd_generic_reply reply; |
1691 | ||
1692 | DBG("Checking quiescent state on control socket"); | |
1693 | ||
58eb9381 | 1694 | if (!conn->session || conn->version_check_done == 0) { |
ad7051c0 DG |
1695 | ERR("Trying to check for data before version check"); |
1696 | ret = -1; | |
1697 | goto end_no_session; | |
1698 | } | |
1699 | ||
58eb9381 | 1700 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
ad7051c0 | 1701 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1702 | if (ret == 0) { |
1703 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1704 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1705 | } else { |
1706 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1707 | ret); | |
1708 | } | |
ad7051c0 DG |
1709 | ret = -1; |
1710 | goto end_no_session; | |
1711 | } | |
1712 | ||
1713 | stream_id = be64toh(msg.stream_id); | |
1714 | ||
1715 | rcu_read_lock(); | |
d3e2ba59 | 1716 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1717 | node.node) { |
ad7051c0 DG |
1718 | if (stream->stream_handle == stream_id) { |
1719 | stream->data_pending_check_done = 1; | |
1720 | DBG("Relay quiescent control pending flag set to %" PRIu64, | |
1721 | stream_id); | |
1722 | break; | |
1723 | } | |
1724 | } | |
1725 | rcu_read_unlock(); | |
1726 | ||
53efb85a | 1727 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1728 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 1729 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1730 | if (ret < 0) { |
6d805429 | 1731 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1732 | } |
1733 | ||
ad7051c0 | 1734 | end_no_session: |
c8f59ee5 DG |
1735 | return ret; |
1736 | } | |
1737 | ||
f7079f67 DG |
1738 | /* |
1739 | * Initialize a data pending command. This means that a client is about to ask | |
1740 | * for data pending for each stream he/she holds. Simply iterate over all | |
1741 | * streams of a session and set the data_pending_check_done flag. | |
1742 | * | |
1743 | * This command returns to the client a LTTNG_OK code. | |
1744 | */ | |
1745 | static | |
1746 | int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1747 | struct relay_connection *conn) |
f7079f67 DG |
1748 | { |
1749 | int ret; | |
1750 | struct lttng_ht_iter iter; | |
1751 | struct lttcomm_relayd_begin_data_pending msg; | |
1752 | struct lttcomm_relayd_generic_reply reply; | |
1753 | struct relay_stream *stream; | |
1754 | uint64_t session_id; | |
1755 | ||
1756 | assert(recv_hdr); | |
58eb9381 | 1757 | assert(conn); |
f7079f67 DG |
1758 | |
1759 | DBG("Init streams for data pending"); | |
1760 | ||
58eb9381 | 1761 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1762 | ERR("Trying to check for data before version check"); |
1763 | ret = -1; | |
1764 | goto end_no_session; | |
1765 | } | |
1766 | ||
58eb9381 | 1767 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1768 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1769 | if (ret == 0) { |
1770 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1771 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1772 | } else { |
1773 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1774 | ret); | |
1775 | } | |
f7079f67 DG |
1776 | ret = -1; |
1777 | goto end_no_session; | |
1778 | } | |
1779 | ||
1780 | session_id = be64toh(msg.session_id); | |
1781 | ||
1782 | /* | |
1783 | * Iterate over all streams to set the begin data pending flag. For now, the | |
1784 | * streams are indexed by stream handle so we have to iterate over all | |
1785 | * streams to find the one associated with the right session_id. | |
1786 | */ | |
1787 | rcu_read_lock(); | |
d3e2ba59 | 1788 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 DG |
1789 | node.node) { |
1790 | if (stream->session_id == session_id) { | |
f7079f67 DG |
1791 | stream->data_pending_check_done = 0; |
1792 | DBG("Set begin data pending flag to stream %" PRIu64, | |
1793 | stream->stream_handle); | |
1794 | } | |
1795 | } | |
1796 | rcu_read_unlock(); | |
1797 | ||
53efb85a | 1798 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1799 | /* All good, send back reply. */ |
1800 | reply.ret_code = htobe32(LTTNG_OK); | |
1801 | ||
58eb9381 | 1802 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1803 | if (ret < 0) { |
1804 | ERR("Relay begin data pending send reply failed"); | |
1805 | } | |
1806 | ||
1807 | end_no_session: | |
1808 | return ret; | |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * End data pending command. This will check, for a given session id, if each | |
1813 | * stream associated with it has its data_pending_check_done flag set. If not, | |
1814 | * this means that the client lost track of the stream but the data is still | |
1815 | * being streamed on our side. In this case, we inform the client that data is | |
1816 | * inflight. | |
1817 | * | |
1818 | * Return to the client if there is data in flight or not with a ret_code. | |
1819 | */ | |
1820 | static | |
1821 | int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1822 | struct relay_connection *conn) |
f7079f67 DG |
1823 | { |
1824 | int ret; | |
1825 | struct lttng_ht_iter iter; | |
1826 | struct lttcomm_relayd_end_data_pending msg; | |
1827 | struct lttcomm_relayd_generic_reply reply; | |
1828 | struct relay_stream *stream; | |
1829 | uint64_t session_id; | |
1830 | uint32_t is_data_inflight = 0; | |
1831 | ||
1832 | assert(recv_hdr); | |
58eb9381 | 1833 | assert(conn); |
f7079f67 DG |
1834 | |
1835 | DBG("End data pending command"); | |
1836 | ||
58eb9381 | 1837 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1838 | ERR("Trying to check for data before version check"); |
1839 | ret = -1; | |
1840 | goto end_no_session; | |
1841 | } | |
1842 | ||
58eb9381 | 1843 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1844 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1845 | if (ret == 0) { |
1846 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1847 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1848 | } else { |
1849 | ERR("Relay didn't receive valid end data_pending struct size: %d", | |
1850 | ret); | |
1851 | } | |
f7079f67 DG |
1852 | ret = -1; |
1853 | goto end_no_session; | |
1854 | } | |
1855 | ||
1856 | session_id = be64toh(msg.session_id); | |
1857 | ||
1858 | /* Iterate over all streams to see if the begin data pending flag is set. */ | |
1859 | rcu_read_lock(); | |
d3e2ba59 | 1860 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 DG |
1861 | node.node) { |
1862 | if (stream->session_id == session_id && | |
f94b19e6 | 1863 | !stream->data_pending_check_done && !stream->terminated_flag) { |
f7079f67 DG |
1864 | is_data_inflight = 1; |
1865 | DBG("Data is still in flight for stream %" PRIu64, | |
1866 | stream->stream_handle); | |
1867 | break; | |
1868 | } | |
1869 | } | |
1870 | rcu_read_unlock(); | |
1871 | ||
53efb85a | 1872 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1873 | /* All good, send back reply. */ |
1874 | reply.ret_code = htobe32(is_data_inflight); | |
1875 | ||
58eb9381 | 1876 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1877 | if (ret < 0) { |
1878 | ERR("Relay end data pending send reply failed"); | |
1879 | } | |
1880 | ||
1881 | end_no_session: | |
1882 | return ret; | |
1883 | } | |
1884 | ||
1c20f0e2 JD |
1885 | /* |
1886 | * Receive an index for a specific stream. | |
1887 | * | |
1888 | * Return 0 on success else a negative value. | |
1889 | */ | |
1890 | static | |
1891 | int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1892 | struct relay_connection *conn) |
1c20f0e2 JD |
1893 | { |
1894 | int ret, send_ret, index_created = 0; | |
58eb9381 | 1895 | struct relay_session *session = conn->session; |
1c20f0e2 JD |
1896 | struct lttcomm_relayd_index index_info; |
1897 | struct relay_index *index, *wr_index = NULL; | |
1898 | struct lttcomm_relayd_generic_reply reply; | |
1899 | struct relay_stream *stream; | |
1900 | uint64_t net_seq_num; | |
1901 | ||
58eb9381 | 1902 | assert(conn); |
1c20f0e2 JD |
1903 | |
1904 | DBG("Relay receiving index"); | |
1905 | ||
58eb9381 | 1906 | if (!session || conn->version_check_done == 0) { |
1c20f0e2 JD |
1907 | ERR("Trying to close a stream before version check"); |
1908 | ret = -1; | |
1909 | goto end_no_session; | |
1910 | } | |
1911 | ||
58eb9381 | 1912 | ret = conn->sock->ops->recvmsg(conn->sock, &index_info, |
1c20f0e2 JD |
1913 | sizeof(index_info), 0); |
1914 | if (ret < sizeof(index_info)) { | |
1915 | if (ret == 0) { | |
1916 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1917 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
1c20f0e2 JD |
1918 | } else { |
1919 | ERR("Relay didn't receive valid index struct size : %d", ret); | |
1920 | } | |
1921 | ret = -1; | |
1922 | goto end_no_session; | |
1923 | } | |
1924 | ||
1925 | net_seq_num = be64toh(index_info.net_seq_num); | |
1926 | ||
1927 | rcu_read_lock(); | |
2a174661 DG |
1928 | stream = stream_find_by_id(relay_streams_ht, |
1929 | be64toh(index_info.relay_stream_id)); | |
1c20f0e2 JD |
1930 | if (!stream) { |
1931 | ret = -1; | |
1932 | goto end_rcu_unlock; | |
1933 | } | |
1934 | ||
d3e2ba59 JD |
1935 | /* Live beacon handling */ |
1936 | if (index_info.packet_size == 0) { | |
1937 | DBG("Received live beacon for stream %" PRIu64, stream->stream_handle); | |
1938 | ||
1939 | /* | |
1940 | * Only flag a stream inactive when it has already received data. | |
1941 | */ | |
1942 | if (stream->total_index_received > 0) { | |
1943 | stream->beacon_ts_end = be64toh(index_info.timestamp_end); | |
1944 | } | |
1945 | ret = 0; | |
1946 | goto end_rcu_unlock; | |
1947 | } else { | |
1948 | stream->beacon_ts_end = -1ULL; | |
1949 | } | |
1950 | ||
0a6518b0 | 1951 | index = relay_index_find(stream->stream_handle, net_seq_num); |
1c20f0e2 JD |
1952 | if (!index) { |
1953 | /* A successful creation will add the object to the HT. */ | |
1954 | index = relay_index_create(stream->stream_handle, net_seq_num); | |
1955 | if (!index) { | |
1956 | goto end_rcu_unlock; | |
1957 | } | |
1958 | index_created = 1; | |
1959 | } | |
1960 | ||
1961 | copy_index_control_data(index, &index_info); | |
1962 | ||
1963 | if (index_created) { | |
1964 | /* | |
1965 | * Try to add the relay index object to the hash table. If an object | |
1966 | * already exist, destroy back the index created, set the data in this | |
1967 | * object and write it on disk. | |
1968 | */ | |
0a6518b0 | 1969 | relay_index_add(index, &wr_index); |
1c20f0e2 JD |
1970 | if (wr_index) { |
1971 | copy_index_control_data(wr_index, &index_info); | |
1972 | free(index); | |
1973 | } | |
1974 | } else { | |
1975 | /* The index already exists so write it on disk. */ | |
1976 | wr_index = index; | |
1977 | } | |
1978 | ||
1979 | /* Do we have a writable ready index to write on disk. */ | |
1980 | if (wr_index) { | |
0a6518b0 | 1981 | ret = relay_index_write(wr_index->fd, wr_index); |
1c20f0e2 JD |
1982 | if (ret < 0) { |
1983 | goto end_rcu_unlock; | |
1984 | } | |
d3e2ba59 | 1985 | stream->total_index_received++; |
1c20f0e2 JD |
1986 | } |
1987 | ||
1988 | end_rcu_unlock: | |
1989 | rcu_read_unlock(); | |
1990 | ||
53efb85a | 1991 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
1992 | if (ret < 0) { |
1993 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1994 | } else { | |
1995 | reply.ret_code = htobe32(LTTNG_OK); | |
1996 | } | |
58eb9381 | 1997 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1c20f0e2 JD |
1998 | if (send_ret < 0) { |
1999 | ERR("Relay sending close index id reply"); | |
2000 | ret = send_ret; | |
2001 | } | |
2002 | ||
2003 | end_no_session: | |
2004 | return ret; | |
2005 | } | |
2006 | ||
a4baae1b JD |
2007 | /* |
2008 | * Receive the streams_sent message. | |
2009 | * | |
2010 | * Return 0 on success else a negative value. | |
2011 | */ | |
2012 | static | |
2013 | int relay_streams_sent(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 2014 | struct relay_connection *conn) |
a4baae1b JD |
2015 | { |
2016 | int ret, send_ret; | |
2017 | struct lttcomm_relayd_generic_reply reply; | |
2018 | ||
58eb9381 | 2019 | assert(conn); |
a4baae1b JD |
2020 | |
2021 | DBG("Relay receiving streams_sent"); | |
2022 | ||
58eb9381 | 2023 | if (!conn->session || conn->version_check_done == 0) { |
a4baae1b JD |
2024 | ERR("Trying to close a stream before version check"); |
2025 | ret = -1; | |
2026 | goto end_no_session; | |
2027 | } | |
2028 | ||
2029 | /* | |
2030 | * Flag every pending stream in the connection recv list that they are | |
2031 | * ready to be used by the viewer. | |
2032 | */ | |
58eb9381 | 2033 | set_viewer_ready_flag(conn); |
a4baae1b | 2034 | |
4a9daf17 JD |
2035 | /* |
2036 | * Inform the viewer that there are new streams in the session. | |
2037 | */ | |
c5141fe5 JD |
2038 | if (conn->session->viewer_refcount) { |
2039 | uatomic_set(&conn->session->new_streams, 1); | |
2040 | } | |
4a9daf17 | 2041 | |
53efb85a | 2042 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2043 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2044 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
a4baae1b JD |
2045 | if (send_ret < 0) { |
2046 | ERR("Relay sending sent_stream reply"); | |
2047 | ret = send_ret; | |
2048 | } else { | |
2049 | /* Success. */ | |
2050 | ret = 0; | |
2051 | } | |
2052 | ||
2053 | end_no_session: | |
2054 | return ret; | |
2055 | } | |
2056 | ||
b8aa1682 | 2057 | /* |
d3e2ba59 | 2058 | * Process the commands received on the control socket |
b8aa1682 JD |
2059 | */ |
2060 | static | |
2061 | int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 2062 | struct relay_connection *conn) |
b8aa1682 JD |
2063 | { |
2064 | int ret = 0; | |
2065 | ||
2066 | switch (be32toh(recv_hdr->cmd)) { | |
b8aa1682 | 2067 | case RELAYD_CREATE_SESSION: |
58eb9381 | 2068 | ret = relay_create_session(recv_hdr, conn); |
b8aa1682 | 2069 | break; |
b8aa1682 | 2070 | case RELAYD_ADD_STREAM: |
58eb9381 | 2071 | ret = relay_add_stream(recv_hdr, conn); |
b8aa1682 JD |
2072 | break; |
2073 | case RELAYD_START_DATA: | |
58eb9381 | 2074 | ret = relay_start(recv_hdr, conn); |
b8aa1682 JD |
2075 | break; |
2076 | case RELAYD_SEND_METADATA: | |
58eb9381 | 2077 | ret = relay_recv_metadata(recv_hdr, conn); |
b8aa1682 JD |
2078 | break; |
2079 | case RELAYD_VERSION: | |
58eb9381 | 2080 | ret = relay_send_version(recv_hdr, conn); |
b8aa1682 | 2081 | break; |
173af62f | 2082 | case RELAYD_CLOSE_STREAM: |
58eb9381 | 2083 | ret = relay_close_stream(recv_hdr, conn); |
173af62f | 2084 | break; |
6d805429 | 2085 | case RELAYD_DATA_PENDING: |
58eb9381 | 2086 | ret = relay_data_pending(recv_hdr, conn); |
c8f59ee5 DG |
2087 | break; |
2088 | case RELAYD_QUIESCENT_CONTROL: | |
58eb9381 | 2089 | ret = relay_quiescent_control(recv_hdr, conn); |
c8f59ee5 | 2090 | break; |
f7079f67 | 2091 | case RELAYD_BEGIN_DATA_PENDING: |
58eb9381 | 2092 | ret = relay_begin_data_pending(recv_hdr, conn); |
f7079f67 DG |
2093 | break; |
2094 | case RELAYD_END_DATA_PENDING: | |
58eb9381 | 2095 | ret = relay_end_data_pending(recv_hdr, conn); |
f7079f67 | 2096 | break; |
1c20f0e2 | 2097 | case RELAYD_SEND_INDEX: |
58eb9381 | 2098 | ret = relay_recv_index(recv_hdr, conn); |
1c20f0e2 | 2099 | break; |
a4baae1b | 2100 | case RELAYD_STREAMS_SENT: |
58eb9381 | 2101 | ret = relay_streams_sent(recv_hdr, conn); |
a4baae1b | 2102 | break; |
b8aa1682 JD |
2103 | case RELAYD_UPDATE_SYNC_INFO: |
2104 | default: | |
2105 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
58eb9381 | 2106 | relay_unknown_command(conn); |
b8aa1682 JD |
2107 | ret = -1; |
2108 | goto end; | |
2109 | } | |
2110 | ||
2111 | end: | |
2112 | return ret; | |
2113 | } | |
2114 | ||
7d2f7452 DG |
2115 | /* |
2116 | * Handle index for a data stream. | |
2117 | * | |
2118 | * RCU read side lock MUST be acquired. | |
2119 | * | |
2120 | * Return 0 on success else a negative value. | |
2121 | */ | |
2122 | static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num, | |
2123 | int rotate_index) | |
2124 | { | |
2125 | int ret = 0, index_created = 0; | |
2126 | uint64_t stream_id, data_offset; | |
2127 | struct relay_index *index, *wr_index = NULL; | |
2128 | ||
2129 | assert(stream); | |
2130 | ||
2131 | stream_id = stream->stream_handle; | |
2132 | /* Get data offset because we are about to update the index. */ | |
2133 | data_offset = htobe64(stream->tracefile_size_current); | |
2134 | ||
2135 | /* | |
2136 | * Lookup for an existing index for that stream id/sequence number. If on | |
2137 | * exists, the control thread already received the data for it thus we need | |
2138 | * to write it on disk. | |
2139 | */ | |
2140 | index = relay_index_find(stream_id, net_seq_num); | |
2141 | if (!index) { | |
2142 | /* A successful creation will add the object to the HT. */ | |
2143 | index = relay_index_create(stream_id, net_seq_num); | |
2144 | if (!index) { | |
2145 | ret = -1; | |
2146 | goto error; | |
2147 | } | |
2148 | index_created = 1; | |
2149 | } | |
2150 | ||
2151 | if (rotate_index || stream->index_fd < 0) { | |
2152 | index->to_close_fd = stream->index_fd; | |
2153 | ret = index_create_file(stream->path_name, stream->channel_name, | |
2154 | relayd_uid, relayd_gid, stream->tracefile_size, | |
2155 | stream->tracefile_count_current); | |
2156 | if (ret < 0) { | |
2157 | /* This will close the stream's index fd if one. */ | |
2158 | relay_index_free_safe(index); | |
2159 | goto error; | |
2160 | } | |
2161 | stream->index_fd = ret; | |
2162 | } | |
2163 | index->fd = stream->index_fd; | |
2164 | index->index_data.offset = data_offset; | |
2165 | ||
2166 | if (index_created) { | |
2167 | /* | |
2168 | * Try to add the relay index object to the hash table. If an object | |
2169 | * already exist, destroy back the index created and set the data. | |
2170 | */ | |
2171 | relay_index_add(index, &wr_index); | |
2172 | if (wr_index) { | |
2173 | /* Copy back data from the created index. */ | |
2174 | wr_index->fd = index->fd; | |
2175 | wr_index->to_close_fd = index->to_close_fd; | |
2176 | wr_index->index_data.offset = data_offset; | |
2177 | free(index); | |
2178 | } | |
2179 | } else { | |
2180 | /* The index already exists so write it on disk. */ | |
2181 | wr_index = index; | |
2182 | } | |
2183 | ||
2184 | /* Do we have a writable ready index to write on disk. */ | |
2185 | if (wr_index) { | |
2186 | ret = relay_index_write(wr_index->fd, wr_index); | |
2187 | if (ret < 0) { | |
2188 | goto error; | |
2189 | } | |
2190 | stream->total_index_received++; | |
2191 | } | |
2192 | ||
2193 | error: | |
2194 | return ret; | |
2195 | } | |
2196 | ||
b8aa1682 JD |
2197 | /* |
2198 | * relay_process_data: Process the data received on the data socket | |
2199 | */ | |
2200 | static | |
58eb9381 | 2201 | int relay_process_data(struct relay_connection *conn) |
b8aa1682 | 2202 | { |
7d2f7452 | 2203 | int ret = 0, rotate_index = 0; |
6cd525e8 | 2204 | ssize_t size_ret; |
b8aa1682 JD |
2205 | struct relay_stream *stream; |
2206 | struct lttcomm_relayd_data_hdr data_hdr; | |
7d2f7452 | 2207 | uint64_t stream_id; |
173af62f | 2208 | uint64_t net_seq_num; |
b8aa1682 | 2209 | uint32_t data_size; |
2a174661 | 2210 | struct relay_session *session; |
b8aa1682 | 2211 | |
58eb9381 DG |
2212 | assert(conn); |
2213 | ||
2214 | ret = conn->sock->ops->recvmsg(conn->sock, &data_hdr, | |
7c5aef62 | 2215 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 | 2216 | if (ret <= 0) { |
a6cd2b97 DG |
2217 | if (ret == 0) { |
2218 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2219 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 | 2220 | } else { |
58eb9381 | 2221 | ERR("Unable to receive data header on sock %d", conn->sock->fd); |
a6cd2b97 | 2222 | } |
b8aa1682 JD |
2223 | ret = -1; |
2224 | goto end; | |
2225 | } | |
2226 | ||
2227 | stream_id = be64toh(data_hdr.stream_id); | |
9d1bbf21 MD |
2228 | |
2229 | rcu_read_lock(); | |
2a174661 | 2230 | stream = stream_find_by_id(relay_streams_ht, stream_id); |
b8aa1682 JD |
2231 | if (!stream) { |
2232 | ret = -1; | |
1c20f0e2 | 2233 | goto end_rcu_unlock; |
b8aa1682 JD |
2234 | } |
2235 | ||
58eb9381 | 2236 | session = session_find_by_id(conn->sessions_ht, stream->session_id); |
2a174661 DG |
2237 | assert(session); |
2238 | ||
b8aa1682 JD |
2239 | data_size = be32toh(data_hdr.data_size); |
2240 | if (data_buffer_size < data_size) { | |
c617c0c6 MD |
2241 | char *tmp_data_ptr; |
2242 | ||
2243 | tmp_data_ptr = realloc(data_buffer, data_size); | |
2244 | if (!tmp_data_ptr) { | |
b8aa1682 | 2245 | ERR("Allocating data buffer"); |
c617c0c6 | 2246 | free(data_buffer); |
b8aa1682 | 2247 | ret = -1; |
1c20f0e2 | 2248 | goto end_rcu_unlock; |
b8aa1682 | 2249 | } |
c617c0c6 | 2250 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
2251 | data_buffer_size = data_size; |
2252 | } | |
2253 | memset(data_buffer, 0, data_size); | |
2254 | ||
173af62f DG |
2255 | net_seq_num = be64toh(data_hdr.net_seq_num); |
2256 | ||
77c7c900 | 2257 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 2258 | data_size, stream_id, net_seq_num); |
58eb9381 | 2259 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0); |
b8aa1682 | 2260 | if (ret <= 0) { |
a6cd2b97 DG |
2261 | if (ret == 0) { |
2262 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2263 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 | 2264 | } |
b8aa1682 | 2265 | ret = -1; |
1c20f0e2 | 2266 | goto end_rcu_unlock; |
b8aa1682 JD |
2267 | } |
2268 | ||
1c20f0e2 | 2269 | /* Check if a rotation is needed. */ |
0f907de1 JD |
2270 | if (stream->tracefile_size > 0 && |
2271 | (stream->tracefile_size_current + data_size) > | |
2272 | stream->tracefile_size) { | |
6b6b9a5a JD |
2273 | struct relay_viewer_stream *vstream; |
2274 | uint64_t new_id; | |
2275 | ||
2276 | new_id = (stream->tracefile_count_current + 1) % | |
2277 | stream->tracefile_count; | |
2278 | /* | |
2279 | * When we wrap-around back to 0, we start overwriting old | |
2280 | * trace data. | |
2281 | */ | |
2282 | if (!stream->tracefile_overwrite && new_id == 0) { | |
2283 | stream->tracefile_overwrite = 1; | |
2284 | } | |
2285 | pthread_mutex_lock(&stream->viewer_stream_rotation_lock); | |
2286 | if (stream->tracefile_overwrite) { | |
2287 | stream->oldest_tracefile_id = | |
2288 | (stream->oldest_tracefile_id + 1) % | |
2289 | stream->tracefile_count; | |
2290 | } | |
2f8f53af | 2291 | vstream = viewer_stream_find_by_id(stream->stream_handle); |
6b6b9a5a JD |
2292 | if (vstream) { |
2293 | /* | |
2294 | * The viewer is reading a file about to be | |
2295 | * overwritten. Close the FDs it is | |
2296 | * currently using and let it handle the fault. | |
2297 | */ | |
2298 | if (vstream->tracefile_count_current == new_id) { | |
cef0f7d5 | 2299 | pthread_mutex_lock(&vstream->overwrite_lock); |
6b6b9a5a | 2300 | vstream->abort_flag = 1; |
cef0f7d5 | 2301 | pthread_mutex_unlock(&vstream->overwrite_lock); |
6b6b9a5a JD |
2302 | DBG("Streaming side setting abort_flag on stream %s_%lu\n", |
2303 | stream->channel_name, new_id); | |
2304 | } else if (vstream->tracefile_count_current == | |
2305 | stream->tracefile_count_current) { | |
2306 | /* | |
2307 | * The reader and writer were in the | |
2308 | * same trace file, inform the viewer | |
2309 | * that no new index will ever be added | |
2310 | * to this file. | |
2311 | */ | |
2312 | vstream->close_write_flag = 1; | |
2313 | } | |
2314 | } | |
1c20f0e2 JD |
2315 | ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, |
2316 | stream->tracefile_size, stream->tracefile_count, | |
2317 | relayd_uid, relayd_gid, stream->fd, | |
2318 | &(stream->tracefile_count_current), &stream->fd); | |
cef0f7d5 | 2319 | stream->total_index_received = 0; |
6b6b9a5a | 2320 | pthread_mutex_unlock(&stream->viewer_stream_rotation_lock); |
0f907de1 | 2321 | if (ret < 0) { |
1c20f0e2 JD |
2322 | ERR("Rotating stream output file"); |
2323 | goto end_rcu_unlock; | |
0f907de1 | 2324 | } |
a6976990 DG |
2325 | /* Reset current size because we just perform a stream rotation. */ |
2326 | stream->tracefile_size_current = 0; | |
1c20f0e2 JD |
2327 | rotate_index = 1; |
2328 | } | |
2329 | ||
1c20f0e2 | 2330 | /* |
7d2f7452 DG |
2331 | * Index are handled in protocol version 2.4 and above. Also, snapshot and |
2332 | * index are NOT supported. | |
1c20f0e2 | 2333 | */ |
2a174661 | 2334 | if (session->minor >= 4 && !session->snapshot) { |
7d2f7452 | 2335 | ret = handle_index_data(stream, net_seq_num, rotate_index); |
1c20f0e2 | 2336 | if (ret < 0) { |
1c20f0e2 JD |
2337 | goto end_rcu_unlock; |
2338 | } | |
1c20f0e2 JD |
2339 | } |
2340 | ||
7d2f7452 | 2341 | /* Write data to stream output fd. */ |
6cd525e8 MD |
2342 | size_ret = lttng_write(stream->fd, data_buffer, data_size); |
2343 | if (size_ret < data_size) { | |
b8aa1682 JD |
2344 | ERR("Relay error writing data to file"); |
2345 | ret = -1; | |
1c20f0e2 | 2346 | goto end_rcu_unlock; |
b8aa1682 | 2347 | } |
1d4dfdef | 2348 | |
5ab7344e JD |
2349 | DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64, |
2350 | ret, stream->stream_handle); | |
2351 | ||
1d4dfdef DG |
2352 | ret = write_padding_to_file(stream->fd, be32toh(data_hdr.padding_size)); |
2353 | if (ret < 0) { | |
1c20f0e2 | 2354 | goto end_rcu_unlock; |
1d4dfdef | 2355 | } |
1c20f0e2 | 2356 | stream->tracefile_size_current += data_size + be32toh(data_hdr.padding_size); |
1d4dfdef | 2357 | |
173af62f DG |
2358 | stream->prev_seq = net_seq_num; |
2359 | ||
2a174661 | 2360 | try_close_stream(session, stream); |
173af62f | 2361 | |
1c20f0e2 | 2362 | end_rcu_unlock: |
9d1bbf21 | 2363 | rcu_read_unlock(); |
b8aa1682 JD |
2364 | end: |
2365 | return ret; | |
2366 | } | |
2367 | ||
2368 | static | |
58eb9381 | 2369 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
2370 | { |
2371 | int ret; | |
2372 | ||
58eb9381 DG |
2373 | assert(events); |
2374 | ||
2375 | (void) lttng_poll_del(events, pollfd); | |
b8aa1682 JD |
2376 | |
2377 | ret = close(pollfd); | |
2378 | if (ret < 0) { | |
2379 | ERR("Closing pollfd %d", pollfd); | |
2380 | } | |
2381 | } | |
2382 | ||
58eb9381 DG |
2383 | static void destroy_connection(struct lttng_ht *relay_connections_ht, |
2384 | struct relay_connection *conn) | |
9d1bbf21 | 2385 | { |
58eb9381 DG |
2386 | assert(relay_connections_ht); |
2387 | assert(conn); | |
2a174661 | 2388 | |
58eb9381 | 2389 | connection_delete(relay_connections_ht, conn); |
2a174661 | 2390 | |
58eb9381 | 2391 | /* For the control socket, we try to destroy the session. */ |
fd6d7293 | 2392 | if (conn->type == RELAY_CONTROL && conn->session) { |
58eb9381 | 2393 | destroy_session(conn->session, conn->sessions_ht); |
9d1bbf21 | 2394 | } |
5b6d8097 | 2395 | |
58eb9381 | 2396 | connection_destroy(conn); |
b8aa1682 JD |
2397 | } |
2398 | ||
2399 | /* | |
2400 | * This thread does the actual work | |
2401 | */ | |
2402 | static | |
2403 | void *relay_thread_worker(void *data) | |
2404 | { | |
beaad64c DG |
2405 | int ret, err = -1, last_seen_data_fd = -1; |
2406 | uint32_t nb_fd; | |
58eb9381 | 2407 | struct relay_connection *conn; |
b8aa1682 JD |
2408 | struct lttng_poll_event events; |
2409 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 2410 | struct lttng_ht_iter iter; |
b8aa1682 | 2411 | struct lttcomm_relayd_hdr recv_hdr; |
d3e2ba59 JD |
2412 | struct relay_local_data *relay_ctx = (struct relay_local_data *) data; |
2413 | struct lttng_ht *sessions_ht = relay_ctx->sessions_ht; | |
b8aa1682 JD |
2414 | |
2415 | DBG("[thread] Relay worker started"); | |
2416 | ||
9d1bbf21 MD |
2417 | rcu_register_thread(); |
2418 | ||
55706a7d MD |
2419 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
2420 | ||
9b5e0863 MD |
2421 | if (testpoint(relayd_thread_worker)) { |
2422 | goto error_testpoint; | |
2423 | } | |
2424 | ||
f385ae0a MD |
2425 | health_code_update(); |
2426 | ||
b8aa1682 JD |
2427 | /* table of connections indexed on socket */ |
2428 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2429 | if (!relay_connections_ht) { |
2430 | goto relay_connections_ht_error; | |
2431 | } | |
b8aa1682 | 2432 | |
1c20f0e2 JD |
2433 | /* Tables of received indexes indexed by index handle and net_seq_num. */ |
2434 | indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64); | |
2435 | if (!indexes_ht) { | |
2436 | goto indexes_ht_error; | |
2437 | } | |
2438 | ||
b8aa1682 JD |
2439 | ret = create_thread_poll_set(&events, 2); |
2440 | if (ret < 0) { | |
2441 | goto error_poll_create; | |
2442 | } | |
2443 | ||
58eb9381 | 2444 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
2445 | if (ret < 0) { |
2446 | goto error; | |
2447 | } | |
2448 | ||
beaad64c | 2449 | restart: |
b8aa1682 | 2450 | while (1) { |
beaad64c DG |
2451 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2452 | ||
f385ae0a MD |
2453 | health_code_update(); |
2454 | ||
b8aa1682 | 2455 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2456 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 2457 | health_poll_entry(); |
b8aa1682 | 2458 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 2459 | health_poll_exit(); |
b8aa1682 JD |
2460 | if (ret < 0) { |
2461 | /* | |
2462 | * Restart interrupted system call. | |
2463 | */ | |
2464 | if (errno == EINTR) { | |
2465 | goto restart; | |
2466 | } | |
2467 | goto error; | |
2468 | } | |
2469 | ||
0d9c5d77 DG |
2470 | nb_fd = ret; |
2471 | ||
beaad64c DG |
2472 | /* |
2473 | * Process control. The control connection is prioritised so we don't | |
2474 | * starve it with high throughout put tracing data on the data | |
2475 | * connection. | |
2476 | */ | |
b8aa1682 JD |
2477 | for (i = 0; i < nb_fd; i++) { |
2478 | /* Fetch once the poll data */ | |
beaad64c DG |
2479 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2480 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 2481 | |
f385ae0a MD |
2482 | health_code_update(); |
2483 | ||
b8aa1682 JD |
2484 | /* Thread quit pipe has been closed. Killing thread. */ |
2485 | ret = check_thread_quit_pipe(pollfd, revents); | |
2486 | if (ret) { | |
095a4ae5 MD |
2487 | err = 0; |
2488 | goto exit; | |
b8aa1682 JD |
2489 | } |
2490 | ||
58eb9381 DG |
2491 | /* Inspect the relay conn pipe for new connection */ |
2492 | if (pollfd == relay_conn_pipe[0]) { | |
b8aa1682 | 2493 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
58eb9381 | 2494 | ERR("Relay connection pipe error"); |
b8aa1682 JD |
2495 | goto error; |
2496 | } else if (revents & LPOLLIN) { | |
58eb9381 | 2497 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
2498 | if (ret < 0) { |
2499 | goto error; | |
2500 | } | |
58eb9381 DG |
2501 | conn->sessions_ht = sessions_ht; |
2502 | connection_init(conn); | |
2503 | lttng_poll_add(&events, conn->sock->fd, | |
2504 | LPOLLIN | LPOLLRDHUP); | |
2505 | rcu_read_lock(); | |
2506 | lttng_ht_add_unique_ulong(relay_connections_ht, | |
2507 | &conn->sock_n); | |
9d1bbf21 | 2508 | rcu_read_unlock(); |
58eb9381 | 2509 | DBG("Connection socket %d added", conn->sock->fd); |
b8aa1682 | 2510 | } |
58eb9381 DG |
2511 | } else { |
2512 | rcu_read_lock(); | |
2513 | conn = connection_find_by_sock(relay_connections_ht, pollfd); | |
2514 | /* If not found, there is a synchronization issue. */ | |
2515 | assert(conn); | |
2516 | ||
2517 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2518 | cleanup_connection_pollfd(&events, pollfd); | |
2519 | destroy_connection(relay_connections_ht, conn); | |
beaad64c DG |
2520 | if (last_seen_data_fd == pollfd) { |
2521 | last_seen_data_fd = last_notdel_data_fd; | |
2522 | } | |
b8aa1682 | 2523 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
2524 | if (conn->type == RELAY_CONTROL) { |
2525 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, | |
2526 | sizeof(recv_hdr), 0); | |
b8aa1682 | 2527 | if (ret <= 0) { |
58eb9381 DG |
2528 | /* Connection closed */ |
2529 | cleanup_connection_pollfd(&events, pollfd); | |
2530 | destroy_connection(relay_connections_ht, conn); | |
b8aa1682 JD |
2531 | DBG("Control connection closed with %d", pollfd); |
2532 | } else { | |
58eb9381 | 2533 | ret = relay_process_control(&recv_hdr, conn); |
b8aa1682 | 2534 | if (ret < 0) { |
beaad64c | 2535 | /* Clear the session on error. */ |
58eb9381 DG |
2536 | cleanup_connection_pollfd(&events, pollfd); |
2537 | destroy_connection(relay_connections_ht, conn); | |
b8aa1682 JD |
2538 | DBG("Connection closed with %d", pollfd); |
2539 | } | |
beaad64c | 2540 | seen_control = 1; |
b8aa1682 | 2541 | } |
beaad64c DG |
2542 | } else { |
2543 | /* | |
2544 | * Flag the last seen data fd not deleted. It will be | |
2545 | * used as the last seen fd if any fd gets deleted in | |
2546 | * this first loop. | |
2547 | */ | |
2548 | last_notdel_data_fd = pollfd; | |
2549 | } | |
58eb9381 DG |
2550 | } else { |
2551 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
beaad64c DG |
2552 | } |
2553 | rcu_read_unlock(); | |
2554 | } | |
2555 | } | |
2556 | ||
2557 | /* | |
2558 | * The last loop handled a control request, go back to poll to make | |
2559 | * sure we prioritise the control socket. | |
2560 | */ | |
2561 | if (seen_control) { | |
2562 | continue; | |
2563 | } | |
2564 | ||
2565 | if (last_seen_data_fd >= 0) { | |
2566 | for (i = 0; i < nb_fd; i++) { | |
2567 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
2568 | |
2569 | health_code_update(); | |
2570 | ||
beaad64c DG |
2571 | if (last_seen_data_fd == pollfd) { |
2572 | idx = i; | |
2573 | break; | |
2574 | } | |
2575 | } | |
2576 | } | |
2577 | ||
2578 | /* Process data connection. */ | |
2579 | for (i = idx + 1; i < nb_fd; i++) { | |
2580 | /* Fetch the poll data. */ | |
2581 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2582 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2583 | ||
f385ae0a MD |
2584 | health_code_update(); |
2585 | ||
beaad64c | 2586 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 2587 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
2588 | continue; |
2589 | } | |
2590 | ||
2591 | if (revents) { | |
2592 | rcu_read_lock(); | |
58eb9381 DG |
2593 | conn = connection_find_by_sock(relay_connections_ht, pollfd); |
2594 | if (!conn) { | |
beaad64c DG |
2595 | /* Skip it. Might be removed before. */ |
2596 | rcu_read_unlock(); | |
2597 | continue; | |
2598 | } | |
beaad64c DG |
2599 | |
2600 | if (revents & LPOLLIN) { | |
58eb9381 | 2601 | if (conn->type != RELAY_DATA) { |
beaad64c DG |
2602 | continue; |
2603 | } | |
2604 | ||
58eb9381 DG |
2605 | ret = relay_process_data(conn); |
2606 | /* Connection closed */ | |
beaad64c | 2607 | if (ret < 0) { |
58eb9381 DG |
2608 | cleanup_connection_pollfd(&events, pollfd); |
2609 | destroy_connection(relay_connections_ht, conn); | |
beaad64c DG |
2610 | DBG("Data connection closed with %d", pollfd); |
2611 | /* | |
2612 | * Every goto restart call sets the last seen fd where | |
2613 | * here we don't really care since we gracefully | |
2614 | * continue the loop after the connection is deleted. | |
2615 | */ | |
2616 | } else { | |
2617 | /* Keep last seen port. */ | |
2618 | last_seen_data_fd = pollfd; | |
2619 | rcu_read_unlock(); | |
2620 | goto restart; | |
b8aa1682 JD |
2621 | } |
2622 | } | |
9d1bbf21 | 2623 | rcu_read_unlock(); |
b8aa1682 JD |
2624 | } |
2625 | } | |
beaad64c | 2626 | last_seen_data_fd = -1; |
b8aa1682 JD |
2627 | } |
2628 | ||
f385ae0a MD |
2629 | /* Normal exit, no error */ |
2630 | ret = 0; | |
2631 | ||
095a4ae5 | 2632 | exit: |
b8aa1682 JD |
2633 | error: |
2634 | lttng_poll_clean(&events); | |
2635 | ||
58eb9381 | 2636 | /* Cleanup reamaining connection object. */ |
9d1bbf21 | 2637 | rcu_read_lock(); |
58eb9381 DG |
2638 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, conn, |
2639 | sock_n.node) { | |
f385ae0a | 2640 | health_code_update(); |
58eb9381 | 2641 | destroy_connection(relay_connections_ht, conn); |
b8aa1682 | 2642 | } |
94d49140 | 2643 | rcu_read_unlock(); |
7d2f7452 DG |
2644 | error_poll_create: |
2645 | lttng_ht_destroy(indexes_ht); | |
1c20f0e2 | 2646 | indexes_ht_error: |
b8aa1682 | 2647 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 2648 | relay_connections_ht_error: |
58eb9381 DG |
2649 | /* Close relay conn pipes */ |
2650 | utils_close_pipe(relay_conn_pipe); | |
095a4ae5 MD |
2651 | if (err) { |
2652 | DBG("Thread exited with error"); | |
2653 | } | |
b8aa1682 | 2654 | DBG("Worker thread cleanup complete"); |
095a4ae5 | 2655 | free(data_buffer); |
9b5e0863 | 2656 | error_testpoint: |
f385ae0a MD |
2657 | if (err) { |
2658 | health_error(); | |
2659 | ERR("Health error occurred in %s", __func__); | |
2660 | } | |
2661 | health_unregister(health_relayd); | |
9d1bbf21 | 2662 | rcu_unregister_thread(); |
f385ae0a | 2663 | stop_threads(); |
b8aa1682 JD |
2664 | return NULL; |
2665 | } | |
2666 | ||
2667 | /* | |
2668 | * Create the relay command pipe to wake thread_manage_apps. | |
2669 | * Closed in cleanup(). | |
2670 | */ | |
58eb9381 | 2671 | static int create_relay_conn_pipe(void) |
b8aa1682 | 2672 | { |
a02de639 | 2673 | int ret; |
b8aa1682 | 2674 | |
58eb9381 | 2675 | ret = utils_create_pipe_cloexec(relay_conn_pipe); |
b8aa1682 | 2676 | |
b8aa1682 JD |
2677 | return ret; |
2678 | } | |
2679 | ||
2680 | /* | |
2681 | * main | |
2682 | */ | |
2683 | int main(int argc, char **argv) | |
2684 | { | |
2685 | int ret = 0; | |
2686 | void *status; | |
d3e2ba59 | 2687 | struct relay_local_data *relay_ctx; |
b8aa1682 | 2688 | |
b8aa1682 JD |
2689 | /* Parse arguments */ |
2690 | progname = argv[0]; | |
cd60b05a | 2691 | if ((ret = set_options(argc, argv)) < 0) { |
a02de639 | 2692 | goto exit; |
b8aa1682 JD |
2693 | } |
2694 | ||
2695 | if ((ret = set_signal_handler()) < 0) { | |
2696 | goto exit; | |
2697 | } | |
2698 | ||
4d513a50 DG |
2699 | /* Try to create directory if -o, --output is specified. */ |
2700 | if (opt_output_path) { | |
994fa64f DG |
2701 | if (*opt_output_path != '/') { |
2702 | ERR("Please specify an absolute path for -o, --output PATH"); | |
2703 | goto exit; | |
2704 | } | |
2705 | ||
4d513a50 DG |
2706 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG); |
2707 | if (ret < 0) { | |
2708 | ERR("Unable to create %s", opt_output_path); | |
2709 | goto exit; | |
2710 | } | |
2711 | } | |
2712 | ||
b8aa1682 | 2713 | /* Daemonize */ |
b5218ffb | 2714 | if (opt_daemon || opt_background) { |
3fd27398 MD |
2715 | int i; |
2716 | ||
2717 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, | |
2718 | !opt_background); | |
b8aa1682 | 2719 | if (ret < 0) { |
a02de639 | 2720 | goto exit; |
b8aa1682 | 2721 | } |
3fd27398 MD |
2722 | |
2723 | /* | |
2724 | * We are in the child. Make sure all other file | |
2725 | * descriptors are closed, in case we are called with | |
2726 | * more opened file descriptors than the standard ones. | |
2727 | */ | |
2728 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
2729 | (void) close(i); | |
2730 | } | |
2731 | } | |
2732 | ||
2733 | /* Create thread quit pipe */ | |
2734 | if ((ret = init_thread_quit_pipe()) < 0) { | |
2735 | goto error; | |
b8aa1682 JD |
2736 | } |
2737 | ||
1c20f0e2 JD |
2738 | /* We need those values for the file/dir creation. */ |
2739 | relayd_uid = getuid(); | |
2740 | relayd_gid = getgid(); | |
b8aa1682 | 2741 | |
1c20f0e2 JD |
2742 | /* Check if daemon is UID = 0 */ |
2743 | if (relayd_uid == 0) { | |
8d5c808e | 2744 | if (control_uri->port < 1024 || data_uri->port < 1024 || live_uri->port < 1024) { |
b8aa1682 JD |
2745 | ERR("Need to be root to use ports < 1024"); |
2746 | ret = -1; | |
a02de639 | 2747 | goto exit; |
b8aa1682 JD |
2748 | } |
2749 | } | |
2750 | ||
2751 | /* Setup the thread apps communication pipe. */ | |
58eb9381 | 2752 | if ((ret = create_relay_conn_pipe()) < 0) { |
b8aa1682 JD |
2753 | goto exit; |
2754 | } | |
2755 | ||
2756 | /* Init relay command queue. */ | |
58eb9381 | 2757 | cds_wfq_init(&relay_conn_queue.queue); |
b8aa1682 JD |
2758 | |
2759 | /* Set up max poll set size */ | |
2760 | lttng_poll_set_max_size(); | |
2761 | ||
554831e7 MD |
2762 | /* Initialize communication library */ |
2763 | lttcomm_init(); | |
87e45c13 | 2764 | lttcomm_inet_init(); |
554831e7 | 2765 | |
d3e2ba59 JD |
2766 | relay_ctx = zmalloc(sizeof(struct relay_local_data)); |
2767 | if (!relay_ctx) { | |
2768 | PERROR("relay_ctx"); | |
2769 | goto exit; | |
2770 | } | |
2771 | ||
2772 | /* tables of sessions indexed by session ID */ | |
2a174661 | 2773 | relay_ctx->sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 JD |
2774 | if (!relay_ctx->sessions_ht) { |
2775 | goto exit_relay_ctx_sessions; | |
2776 | } | |
2777 | ||
2778 | /* tables of streams indexed by stream ID */ | |
2a174661 | 2779 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 JD |
2780 | if (!relay_streams_ht) { |
2781 | goto exit_relay_ctx_streams; | |
2782 | } | |
2783 | ||
2784 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
2785 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2786 | if (!viewer_streams_ht) { | |
d3e2ba59 JD |
2787 | goto exit_relay_ctx_viewer_streams; |
2788 | } | |
2789 | ||
55706a7d MD |
2790 | /* Initialize thread health monitoring */ |
2791 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
2792 | if (!health_relayd) { | |
2793 | PERROR("health_app_create error"); | |
2794 | goto exit_health_app_create; | |
2795 | } | |
2796 | ||
65931c8b MD |
2797 | ret = utils_create_pipe(health_quit_pipe); |
2798 | if (ret < 0) { | |
2799 | goto error_health_pipe; | |
2800 | } | |
2801 | ||
2802 | /* Create thread to manage the client socket */ | |
2803 | ret = pthread_create(&health_thread, NULL, | |
2804 | thread_manage_health, (void *) NULL); | |
2805 | if (ret != 0) { | |
2806 | PERROR("pthread_create health"); | |
2807 | goto health_error; | |
2808 | } | |
2809 | ||
b8aa1682 JD |
2810 | /* Setup the dispatcher thread */ |
2811 | ret = pthread_create(&dispatcher_thread, NULL, | |
2812 | relay_thread_dispatcher, (void *) NULL); | |
2813 | if (ret != 0) { | |
2814 | PERROR("pthread_create dispatcher"); | |
2815 | goto exit_dispatcher; | |
2816 | } | |
2817 | ||
2818 | /* Setup the worker thread */ | |
2819 | ret = pthread_create(&worker_thread, NULL, | |
d3e2ba59 | 2820 | relay_thread_worker, (void *) relay_ctx); |
b8aa1682 JD |
2821 | if (ret != 0) { |
2822 | PERROR("pthread_create worker"); | |
2823 | goto exit_worker; | |
2824 | } | |
2825 | ||
2826 | /* Setup the listener thread */ | |
2827 | ret = pthread_create(&listener_thread, NULL, | |
2828 | relay_thread_listener, (void *) NULL); | |
2829 | if (ret != 0) { | |
2830 | PERROR("pthread_create listener"); | |
2831 | goto exit_listener; | |
2832 | } | |
2833 | ||
0b242f62 | 2834 | ret = live_start_threads(live_uri, relay_ctx); |
d3e2ba59 JD |
2835 | if (ret != 0) { |
2836 | ERR("Starting live viewer threads"); | |
50138f51 | 2837 | goto exit_live; |
d3e2ba59 JD |
2838 | } |
2839 | ||
50138f51 | 2840 | exit_live: |
b8aa1682 JD |
2841 | ret = pthread_join(listener_thread, &status); |
2842 | if (ret != 0) { | |
2843 | PERROR("pthread_join"); | |
2844 | goto error; /* join error, exit without cleanup */ | |
2845 | } | |
2846 | ||
50138f51 | 2847 | exit_listener: |
b8aa1682 JD |
2848 | ret = pthread_join(worker_thread, &status); |
2849 | if (ret != 0) { | |
2850 | PERROR("pthread_join"); | |
2851 | goto error; /* join error, exit without cleanup */ | |
2852 | } | |
2853 | ||
50138f51 | 2854 | exit_worker: |
b8aa1682 JD |
2855 | ret = pthread_join(dispatcher_thread, &status); |
2856 | if (ret != 0) { | |
2857 | PERROR("pthread_join"); | |
2858 | goto error; /* join error, exit without cleanup */ | |
2859 | } | |
42415026 | 2860 | |
50138f51 | 2861 | exit_dispatcher: |
65931c8b MD |
2862 | ret = pthread_join(health_thread, &status); |
2863 | if (ret != 0) { | |
2864 | PERROR("pthread_join health thread"); | |
2865 | goto error; /* join error, exit without cleanup */ | |
2866 | } | |
2867 | ||
bd11e201 MD |
2868 | /* |
2869 | * Stop live threads only after joining other threads. | |
2870 | */ | |
2871 | live_stop_threads(); | |
2872 | ||
65931c8b MD |
2873 | health_error: |
2874 | utils_close_pipe(health_quit_pipe); | |
2875 | ||
2876 | error_health_pipe: | |
55706a7d MD |
2877 | health_app_destroy(health_relayd); |
2878 | ||
2879 | exit_health_app_create: | |
92c6ca54 | 2880 | lttng_ht_destroy(viewer_streams_ht); |
d3e2ba59 JD |
2881 | |
2882 | exit_relay_ctx_viewer_streams: | |
2883 | lttng_ht_destroy(relay_streams_ht); | |
2884 | ||
2885 | exit_relay_ctx_streams: | |
2886 | lttng_ht_destroy(relay_ctx->sessions_ht); | |
2887 | ||
2888 | exit_relay_ctx_sessions: | |
2889 | free(relay_ctx); | |
b8aa1682 JD |
2890 | |
2891 | exit: | |
2892 | cleanup(); | |
2893 | if (!ret) { | |
2894 | exit(EXIT_SUCCESS); | |
2895 | } | |
a02de639 | 2896 | |
b8aa1682 JD |
2897 | error: |
2898 | exit(EXIT_FAILURE); | |
2899 | } |