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 | |
6c1c0768 | 21 | #define _LGPL_SOURCE |
b8aa1682 JD |
22 | #include <getopt.h> |
23 | #include <grp.h> | |
24 | #include <limits.h> | |
25 | #include <pthread.h> | |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #include <sys/mman.h> | |
31 | #include <sys/mount.h> | |
32 | #include <sys/resource.h> | |
33 | #include <sys/socket.h> | |
34 | #include <sys/stat.h> | |
35 | #include <sys/types.h> | |
36 | #include <sys/wait.h> | |
173af62f | 37 | #include <inttypes.h> |
b8aa1682 JD |
38 | #include <urcu/futex.h> |
39 | #include <urcu/uatomic.h> | |
40 | #include <unistd.h> | |
41 | #include <fcntl.h> | |
42 | #include <config.h> | |
43 | ||
44 | #include <lttng/lttng.h> | |
45 | #include <common/common.h> | |
46 | #include <common/compat/poll.h> | |
47 | #include <common/compat/socket.h> | |
f263b7fd | 48 | #include <common/compat/endian.h> |
b8aa1682 | 49 | #include <common/defaults.h> |
3fd27398 | 50 | #include <common/daemonize.h> |
b8aa1682 JD |
51 | #include <common/futex.h> |
52 | #include <common/sessiond-comm/sessiond-comm.h> | |
53 | #include <common/sessiond-comm/inet.h> | |
b8aa1682 JD |
54 | #include <common/sessiond-comm/relayd.h> |
55 | #include <common/uri.h> | |
a02de639 | 56 | #include <common/utils.h> |
cd60b05a | 57 | #include <common/config/config.h> |
b8aa1682 | 58 | |
0f907de1 | 59 | #include "cmd.h" |
d3e2ba59 | 60 | #include "ctf-trace.h" |
1c20f0e2 | 61 | #include "index.h" |
0f907de1 | 62 | #include "utils.h" |
b8aa1682 | 63 | #include "lttng-relayd.h" |
d3e2ba59 | 64 | #include "live.h" |
55706a7d | 65 | #include "health-relayd.h" |
9b5e0863 | 66 | #include "testpoint.h" |
2f8f53af | 67 | #include "viewer-stream.h" |
2a174661 DG |
68 | #include "session.h" |
69 | #include "stream.h" | |
58eb9381 | 70 | #include "connection.h" |
b8aa1682 JD |
71 | |
72 | /* command line options */ | |
0f907de1 | 73 | char *opt_output_path; |
b5218ffb | 74 | static int opt_daemon, opt_background; |
3fd27398 MD |
75 | |
76 | /* | |
77 | * We need to wait for listener and live listener threads, as well as | |
78 | * health check thread, before being ready to signal readiness. | |
79 | */ | |
80 | #define NR_LTTNG_RELAY_READY 3 | |
81 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
82 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ | |
83 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
84 | ||
095a4ae5 MD |
85 | static struct lttng_uri *control_uri; |
86 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 87 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
88 | |
89 | const char *progname; | |
b8aa1682 | 90 | |
65931c8b | 91 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
92 | static int tracing_group_name_override; |
93 | ||
94 | const char * const config_section_name = "relayd"; | |
65931c8b | 95 | |
b8aa1682 JD |
96 | /* |
97 | * Quit pipe for all threads. This permits a single cancellation point | |
98 | * for all threads when receiving an event on the pipe. | |
99 | */ | |
0b242f62 | 100 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
101 | |
102 | /* | |
103 | * This pipe is used to inform the worker thread that a command is queued and | |
104 | * ready to be processed. | |
105 | */ | |
58eb9381 | 106 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 107 | |
26c9d55e | 108 | /* Shared between threads */ |
b8aa1682 JD |
109 | static int dispatch_thread_exit; |
110 | ||
111 | static pthread_t listener_thread; | |
112 | static pthread_t dispatcher_thread; | |
113 | static pthread_t worker_thread; | |
65931c8b | 114 | static pthread_t health_thread; |
b8aa1682 | 115 | |
095a4ae5 | 116 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
117 | |
118 | /* | |
119 | * Relay command queue. | |
120 | * | |
121 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
122 | * queue. | |
123 | */ | |
58eb9381 | 124 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 JD |
125 | |
126 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
127 | static char *data_buffer; |
128 | static unsigned int data_buffer_size; | |
b8aa1682 | 129 | |
1c20f0e2 JD |
130 | /* We need those values for the file/dir creation. */ |
131 | static uid_t relayd_uid; | |
132 | static gid_t relayd_gid; | |
133 | ||
d3e2ba59 JD |
134 | /* Global relay stream hash table. */ |
135 | struct lttng_ht *relay_streams_ht; | |
136 | ||
92c6ca54 DG |
137 | /* Global relay viewer stream hash table. */ |
138 | struct lttng_ht *viewer_streams_ht; | |
139 | ||
0a6518b0 DG |
140 | /* Global hash table that stores relay index object. */ |
141 | struct lttng_ht *indexes_ht; | |
142 | ||
55706a7d | 143 | /* Relayd health monitoring */ |
eea7556c | 144 | struct health_app *health_relayd; |
55706a7d | 145 | |
cd60b05a JG |
146 | static struct option long_options[] = { |
147 | { "control-port", 1, 0, 'C', }, | |
148 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 149 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 150 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 151 | { "background", 0, 0, 'b', }, |
cd60b05a JG |
152 | { "group", 1, 0, 'g', }, |
153 | { "help", 0, 0, 'h', }, | |
154 | { "output", 1, 0, 'o', }, | |
155 | { "verbose", 0, 0, 'v', }, | |
156 | { "config", 1, 0, 'f' }, | |
157 | { NULL, 0, 0, 0, }, | |
158 | }; | |
159 | ||
160 | static const char *config_ignore_options[] = { "help", "config" }; | |
161 | ||
b8aa1682 JD |
162 | /* |
163 | * usage function on stderr | |
164 | */ | |
165 | static | |
166 | void usage(void) | |
167 | { | |
168 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); | |
994fa64f DG |
169 | fprintf(stderr, " -h, --help Display this usage.\n"); |
170 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
b5218ffb | 171 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
994fa64f DG |
172 | fprintf(stderr, " -C, --control-port URL Control port listening.\n"); |
173 | fprintf(stderr, " -D, --data-port URL Data port listening.\n"); | |
8d5c808e | 174 | fprintf(stderr, " -L, --live-port URL Live view port listening.\n"); |
994fa64f DG |
175 | fprintf(stderr, " -o, --output PATH Output path for traces. Must use an absolute path.\n"); |
176 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
65931c8b | 177 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
cd60b05a | 178 | fprintf(stderr, " -f --config Load daemon configuration file\n"); |
b8aa1682 JD |
179 | } |
180 | ||
cd60b05a JG |
181 | /* |
182 | * Take an option from the getopt output and set it in the right variable to be | |
183 | * used later. | |
184 | * | |
185 | * Return 0 on success else a negative value. | |
186 | */ | |
b8aa1682 | 187 | static |
cd60b05a | 188 | int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 189 | { |
cd60b05a JG |
190 | int ret; |
191 | ||
192 | switch (opt) { | |
193 | case 0: | |
194 | fprintf(stderr, "option %s", optname); | |
195 | if (arg) { | |
196 | fprintf(stderr, " with arg %s\n", arg); | |
197 | } | |
198 | break; | |
199 | case 'C': | |
200 | ret = uri_parse(arg, &control_uri); | |
201 | if (ret < 0) { | |
202 | ERR("Invalid control URI specified"); | |
203 | goto end; | |
204 | } | |
205 | if (control_uri->port == 0) { | |
206 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
207 | } | |
208 | break; | |
209 | case 'D': | |
210 | ret = uri_parse(arg, &data_uri); | |
211 | if (ret < 0) { | |
212 | ERR("Invalid data URI specified"); | |
213 | goto end; | |
214 | } | |
215 | if (data_uri->port == 0) { | |
216 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
217 | } | |
218 | break; | |
8d5c808e AM |
219 | case 'L': |
220 | ret = uri_parse(arg, &live_uri); | |
221 | if (ret < 0) { | |
222 | ERR("Invalid live URI specified"); | |
223 | goto end; | |
224 | } | |
225 | if (live_uri->port == 0) { | |
226 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
227 | } | |
228 | break; | |
cd60b05a JG |
229 | case 'd': |
230 | opt_daemon = 1; | |
231 | break; | |
b5218ffb MD |
232 | case 'b': |
233 | opt_background = 1; | |
234 | break; | |
cd60b05a JG |
235 | case 'g': |
236 | tracing_group_name = strdup(arg); | |
330a40bb MD |
237 | if (tracing_group_name == NULL) { |
238 | ret = -errno; | |
239 | PERROR("strdup"); | |
240 | goto end; | |
241 | } | |
cd60b05a JG |
242 | tracing_group_name_override = 1; |
243 | break; | |
244 | case 'h': | |
245 | usage(); | |
246 | exit(EXIT_FAILURE); | |
247 | case 'o': | |
248 | ret = asprintf(&opt_output_path, "%s", arg); | |
249 | if (ret < 0) { | |
250 | ret = -errno; | |
251 | PERROR("asprintf opt_output_path"); | |
252 | goto end; | |
253 | } | |
254 | break; | |
255 | case 'v': | |
256 | /* Verbose level can increase using multiple -v */ | |
257 | if (arg) { | |
258 | lttng_opt_verbose = config_parse_value(arg); | |
259 | } else { | |
849e5b7b DG |
260 | /* Only 3 level of verbosity (-vvv). */ |
261 | if (lttng_opt_verbose < 3) { | |
262 | lttng_opt_verbose += 1; | |
263 | } | |
cd60b05a JG |
264 | } |
265 | break; | |
266 | default: | |
267 | /* Unknown option or other error. | |
268 | * Error is printed by getopt, just return */ | |
269 | ret = -1; | |
270 | goto end; | |
271 | } | |
272 | ||
273 | /* All good. */ | |
274 | ret = 0; | |
275 | ||
276 | end: | |
277 | return ret; | |
278 | } | |
279 | ||
280 | /* | |
281 | * config_entry_handler_cb used to handle options read from a config file. | |
282 | * See config_entry_handler_cb comment in common/config/config.h for the | |
283 | * return value conventions. | |
284 | */ | |
285 | static | |
286 | int config_entry_handler(const struct config_entry *entry, void *unused) | |
287 | { | |
288 | int ret = 0, i; | |
289 | ||
290 | if (!entry || !entry->name || !entry->value) { | |
291 | ret = -EINVAL; | |
292 | goto end; | |
293 | } | |
294 | ||
295 | /* Check if the option is to be ignored */ | |
296 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
297 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
298 | goto end; | |
299 | } | |
300 | } | |
301 | ||
302 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
303 | /* Ignore if entry name is not fully matched. */ | |
304 | if (strcmp(entry->name, long_options[i].name)) { | |
305 | continue; | |
306 | } | |
307 | ||
308 | /* | |
309 | * If the option takes no argument on the command line, we have to | |
310 | * check if the value is "true". We support non-zero numeric values, | |
311 | * true, on and yes. | |
312 | */ | |
313 | if (!long_options[i].has_arg) { | |
314 | ret = config_parse_value(entry->value); | |
315 | if (ret <= 0) { | |
316 | if (ret) { | |
317 | WARN("Invalid configuration value \"%s\" for option %s", | |
318 | entry->value, entry->name); | |
319 | } | |
320 | /* False, skip boolean config option. */ | |
321 | goto end; | |
322 | } | |
323 | } | |
324 | ||
325 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
326 | goto end; | |
327 | } | |
328 | ||
329 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
330 | entry->name); | |
331 | ||
332 | end: | |
333 | return ret; | |
334 | } | |
335 | ||
336 | static | |
337 | int set_options(int argc, char **argv) | |
338 | { | |
339 | int c, ret = 0, option_index = 0; | |
340 | int orig_optopt = optopt, orig_optind = optind; | |
341 | char *default_address, *optstring; | |
342 | const char *config_path = NULL; | |
343 | ||
344 | optstring = utils_generate_optstring(long_options, | |
345 | sizeof(long_options) / sizeof(struct option)); | |
346 | if (!optstring) { | |
347 | ret = -ENOMEM; | |
348 | goto exit; | |
349 | } | |
350 | ||
351 | /* Check for the --config option */ | |
352 | ||
353 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
354 | &option_index)) != -1) { | |
355 | if (c == '?') { | |
356 | ret = -EINVAL; | |
357 | goto exit; | |
358 | } else if (c != 'f') { | |
359 | continue; | |
360 | } | |
361 | ||
362 | config_path = utils_expand_path(optarg); | |
363 | if (!config_path) { | |
364 | ERR("Failed to resolve path: %s", optarg); | |
365 | } | |
366 | } | |
367 | ||
368 | ret = config_get_section_entries(config_path, config_section_name, | |
369 | config_entry_handler, NULL); | |
370 | if (ret) { | |
371 | if (ret > 0) { | |
372 | ERR("Invalid configuration option at line %i", ret); | |
373 | ret = -1; | |
374 | } | |
375 | goto exit; | |
376 | } | |
b8aa1682 | 377 | |
cd60b05a JG |
378 | /* Reset getopt's global state */ |
379 | optopt = orig_optopt; | |
380 | optind = orig_optind; | |
b8aa1682 | 381 | while (1) { |
cd60b05a | 382 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
383 | if (c == -1) { |
384 | break; | |
385 | } | |
386 | ||
cd60b05a JG |
387 | ret = set_option(c, optarg, long_options[option_index].name); |
388 | if (ret < 0) { | |
b8aa1682 JD |
389 | goto exit; |
390 | } | |
391 | } | |
392 | ||
393 | /* assign default values */ | |
394 | if (control_uri == NULL) { | |
fa91dc52 MD |
395 | ret = asprintf(&default_address, |
396 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
397 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
398 | if (ret < 0) { |
399 | PERROR("asprintf default data address"); | |
400 | goto exit; | |
401 | } | |
402 | ||
403 | ret = uri_parse(default_address, &control_uri); | |
404 | free(default_address); | |
405 | if (ret < 0) { | |
406 | ERR("Invalid control URI specified"); | |
407 | goto exit; | |
408 | } | |
409 | } | |
410 | if (data_uri == NULL) { | |
fa91dc52 MD |
411 | ret = asprintf(&default_address, |
412 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
413 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
414 | if (ret < 0) { |
415 | PERROR("asprintf default data address"); | |
416 | goto exit; | |
417 | } | |
418 | ||
419 | ret = uri_parse(default_address, &data_uri); | |
420 | free(default_address); | |
421 | if (ret < 0) { | |
422 | ERR("Invalid data URI specified"); | |
423 | goto exit; | |
424 | } | |
425 | } | |
d3e2ba59 | 426 | if (live_uri == NULL) { |
fa91dc52 MD |
427 | ret = asprintf(&default_address, |
428 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
429 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
430 | if (ret < 0) { |
431 | PERROR("asprintf default viewer control address"); | |
432 | goto exit; | |
433 | } | |
434 | ||
435 | ret = uri_parse(default_address, &live_uri); | |
436 | free(default_address); | |
437 | if (ret < 0) { | |
438 | ERR("Invalid viewer control URI specified"); | |
439 | goto exit; | |
440 | } | |
441 | } | |
b8aa1682 JD |
442 | |
443 | exit: | |
cd60b05a | 444 | free(optstring); |
b8aa1682 JD |
445 | return ret; |
446 | } | |
447 | ||
448 | /* | |
449 | * Cleanup the daemon | |
450 | */ | |
451 | static | |
452 | void cleanup(void) | |
453 | { | |
b8aa1682 JD |
454 | DBG("Cleaning up"); |
455 | ||
095a4ae5 MD |
456 | /* free the dynamically allocated opt_output_path */ |
457 | free(opt_output_path); | |
458 | ||
a02de639 CB |
459 | /* Close thread quit pipes */ |
460 | utils_close_pipe(thread_quit_pipe); | |
461 | ||
710c1f73 DG |
462 | uri_free(control_uri); |
463 | uri_free(data_uri); | |
8d5c808e | 464 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
465 | |
466 | if (tracing_group_name_override) { | |
467 | free((void *) tracing_group_name); | |
468 | } | |
b8aa1682 JD |
469 | } |
470 | ||
471 | /* | |
472 | * Write to writable pipe used to notify a thread. | |
473 | */ | |
474 | static | |
475 | int notify_thread_pipe(int wpipe) | |
476 | { | |
6cd525e8 | 477 | ssize_t ret; |
b8aa1682 | 478 | |
6cd525e8 MD |
479 | ret = lttng_write(wpipe, "!", 1); |
480 | if (ret < 1) { | |
b8aa1682 JD |
481 | PERROR("write poll pipe"); |
482 | } | |
483 | ||
484 | return ret; | |
485 | } | |
486 | ||
65931c8b MD |
487 | static void notify_health_quit_pipe(int *pipe) |
488 | { | |
6cd525e8 | 489 | ssize_t ret; |
65931c8b | 490 | |
6cd525e8 MD |
491 | ret = lttng_write(pipe[1], "4", 1); |
492 | if (ret < 1) { | |
65931c8b MD |
493 | PERROR("write relay health quit"); |
494 | } | |
495 | } | |
496 | ||
b8aa1682 JD |
497 | /* |
498 | * Stop all threads by closing the thread quit pipe. | |
499 | */ | |
500 | static | |
501 | void stop_threads(void) | |
502 | { | |
503 | int ret; | |
504 | ||
505 | /* Stopping all threads */ | |
506 | DBG("Terminating all threads"); | |
507 | ret = notify_thread_pipe(thread_quit_pipe[1]); | |
508 | if (ret < 0) { | |
509 | ERR("write error on thread quit pipe"); | |
510 | } | |
511 | ||
65931c8b MD |
512 | notify_health_quit_pipe(health_quit_pipe); |
513 | ||
b8aa1682 | 514 | /* Dispatch thread */ |
26c9d55e | 515 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 516 | futex_nto1_wake(&relay_conn_queue.futex); |
b8aa1682 JD |
517 | } |
518 | ||
519 | /* | |
520 | * Signal handler for the daemon | |
521 | * | |
522 | * Simply stop all worker threads, leaving main() return gracefully after | |
523 | * joining all threads and calling cleanup(). | |
524 | */ | |
525 | static | |
526 | void sighandler(int sig) | |
527 | { | |
528 | switch (sig) { | |
529 | case SIGPIPE: | |
530 | DBG("SIGPIPE caught"); | |
531 | return; | |
532 | case SIGINT: | |
533 | DBG("SIGINT caught"); | |
534 | stop_threads(); | |
535 | break; | |
536 | case SIGTERM: | |
537 | DBG("SIGTERM caught"); | |
538 | stop_threads(); | |
539 | break; | |
3fd27398 MD |
540 | case SIGUSR1: |
541 | CMM_STORE_SHARED(recv_child_signal, 1); | |
542 | break; | |
b8aa1682 JD |
543 | default: |
544 | break; | |
545 | } | |
546 | } | |
547 | ||
548 | /* | |
549 | * Setup signal handler for : | |
550 | * SIGINT, SIGTERM, SIGPIPE | |
551 | */ | |
552 | static | |
553 | int set_signal_handler(void) | |
554 | { | |
555 | int ret = 0; | |
556 | struct sigaction sa; | |
557 | sigset_t sigset; | |
558 | ||
559 | if ((ret = sigemptyset(&sigset)) < 0) { | |
560 | PERROR("sigemptyset"); | |
561 | return ret; | |
562 | } | |
563 | ||
564 | sa.sa_handler = sighandler; | |
565 | sa.sa_mask = sigset; | |
566 | sa.sa_flags = 0; | |
567 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
568 | PERROR("sigaction"); | |
569 | return ret; | |
570 | } | |
571 | ||
572 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
573 | PERROR("sigaction"); | |
574 | return ret; | |
575 | } | |
576 | ||
577 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
578 | PERROR("sigaction"); | |
579 | return ret; | |
580 | } | |
581 | ||
3fd27398 MD |
582 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
583 | PERROR("sigaction"); | |
584 | return ret; | |
585 | } | |
586 | ||
587 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
588 | |
589 | return ret; | |
590 | } | |
591 | ||
3fd27398 MD |
592 | void lttng_relay_notify_ready(void) |
593 | { | |
594 | /* Notify the parent of the fork() process that we are ready. */ | |
595 | if (opt_daemon || opt_background) { | |
596 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
597 | kill(child_ppid, SIGUSR1); | |
598 | } | |
599 | } | |
600 | } | |
601 | ||
b8aa1682 JD |
602 | /* |
603 | * Init thread quit pipe. | |
604 | * | |
605 | * Return -1 on error or 0 if all pipes are created. | |
606 | */ | |
607 | static | |
608 | int init_thread_quit_pipe(void) | |
609 | { | |
a02de639 | 610 | int ret; |
b8aa1682 | 611 | |
a02de639 | 612 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 613 | |
b8aa1682 JD |
614 | return ret; |
615 | } | |
616 | ||
617 | /* | |
618 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
619 | */ | |
620 | static | |
621 | int create_thread_poll_set(struct lttng_poll_event *events, int size) | |
622 | { | |
623 | int ret; | |
624 | ||
625 | if (events == NULL || size == 0) { | |
626 | ret = -1; | |
627 | goto error; | |
628 | } | |
629 | ||
630 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
631 | if (ret < 0) { | |
632 | goto error; | |
633 | } | |
634 | ||
635 | /* Add quit pipe */ | |
c7759e6a | 636 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
637 | if (ret < 0) { |
638 | goto error; | |
639 | } | |
640 | ||
641 | return 0; | |
642 | ||
643 | error: | |
644 | return ret; | |
645 | } | |
646 | ||
647 | /* | |
648 | * Check if the thread quit pipe was triggered. | |
649 | * | |
650 | * Return 1 if it was triggered else 0; | |
651 | */ | |
652 | static | |
653 | int check_thread_quit_pipe(int fd, uint32_t events) | |
654 | { | |
655 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
656 | return 1; | |
657 | } | |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
662 | /* | |
663 | * Create and init socket from uri. | |
664 | */ | |
665 | static | |
666 | struct lttcomm_sock *relay_init_sock(struct lttng_uri *uri) | |
667 | { | |
668 | int ret; | |
669 | struct lttcomm_sock *sock = NULL; | |
670 | ||
671 | sock = lttcomm_alloc_sock_from_uri(uri); | |
672 | if (sock == NULL) { | |
673 | ERR("Allocating socket"); | |
674 | goto error; | |
675 | } | |
676 | ||
677 | ret = lttcomm_create_sock(sock); | |
678 | if (ret < 0) { | |
679 | goto error; | |
680 | } | |
681 | DBG("Listening on sock %d", sock->fd); | |
682 | ||
683 | ret = sock->ops->bind(sock); | |
684 | if (ret < 0) { | |
685 | goto error; | |
686 | } | |
687 | ||
688 | ret = sock->ops->listen(sock, -1); | |
689 | if (ret < 0) { | |
690 | goto error; | |
691 | ||
692 | } | |
693 | ||
694 | return sock; | |
695 | ||
696 | error: | |
697 | if (sock) { | |
698 | lttcomm_destroy_sock(sock); | |
699 | } | |
700 | return NULL; | |
701 | } | |
702 | ||
173af62f DG |
703 | /* |
704 | * Return nonzero if stream needs to be closed. | |
705 | */ | |
706 | static | |
707 | int close_stream_check(struct relay_stream *stream) | |
708 | { | |
173af62f | 709 | if (stream->close_flag && stream->prev_seq == stream->last_net_seq_num) { |
f7079f67 DG |
710 | /* |
711 | * We are about to close the stream so set the data pending flag to 1 | |
712 | * which will make the end data pending command skip the stream which | |
713 | * is now closed and ready. Note that after proceeding to a file close, | |
714 | * the written file is ready for reading. | |
715 | */ | |
716 | stream->data_pending_check_done = 1; | |
173af62f DG |
717 | return 1; |
718 | } | |
719 | return 0; | |
720 | } | |
721 | ||
2a174661 DG |
722 | static void try_close_stream(struct relay_session *session, |
723 | struct relay_stream *stream) | |
724 | { | |
725 | int ret; | |
726 | struct ctf_trace *ctf_trace; | |
727 | ||
728 | assert(session); | |
729 | assert(stream); | |
730 | ||
731 | if (!close_stream_check(stream)) { | |
732 | /* Can't close it, not ready for that. */ | |
733 | goto end; | |
734 | } | |
735 | ||
736 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
737 | stream->path_name); | |
738 | assert(ctf_trace); | |
739 | ||
740 | pthread_mutex_lock(&session->viewer_ready_lock); | |
741 | ctf_trace->invalid_flag = 1; | |
742 | pthread_mutex_unlock(&session->viewer_ready_lock); | |
743 | ||
744 | ret = stream_close(session, stream); | |
f94b19e6 | 745 | if (ret || session->snapshot) { |
2a174661 DG |
746 | /* Already close thus the ctf trace is being or has been destroyed. */ |
747 | goto end; | |
748 | } | |
749 | ||
750 | ctf_trace_try_destroy(session, ctf_trace); | |
751 | ||
752 | end: | |
753 | return; | |
754 | } | |
755 | ||
b8aa1682 JD |
756 | /* |
757 | * This thread manages the listening for new connections on the network | |
758 | */ | |
759 | static | |
760 | void *relay_thread_listener(void *data) | |
761 | { | |
095a4ae5 | 762 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
763 | uint32_t revents, nb_fd; |
764 | struct lttng_poll_event events; | |
765 | struct lttcomm_sock *control_sock, *data_sock; | |
766 | ||
b8aa1682 JD |
767 | DBG("[thread] Relay listener started"); |
768 | ||
55706a7d MD |
769 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
770 | ||
f385ae0a MD |
771 | health_code_update(); |
772 | ||
b8aa1682 JD |
773 | control_sock = relay_init_sock(control_uri); |
774 | if (!control_sock) { | |
095a4ae5 | 775 | goto error_sock_control; |
b8aa1682 JD |
776 | } |
777 | ||
778 | data_sock = relay_init_sock(data_uri); | |
779 | if (!data_sock) { | |
095a4ae5 | 780 | goto error_sock_relay; |
b8aa1682 JD |
781 | } |
782 | ||
783 | /* | |
784 | * Pass 3 as size here for the thread quit pipe, control and data socket. | |
785 | */ | |
786 | ret = create_thread_poll_set(&events, 3); | |
787 | if (ret < 0) { | |
788 | goto error_create_poll; | |
789 | } | |
790 | ||
791 | /* Add the control socket */ | |
792 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
793 | if (ret < 0) { | |
794 | goto error_poll_add; | |
795 | } | |
796 | ||
797 | /* Add the data socket */ | |
798 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
799 | if (ret < 0) { | |
800 | goto error_poll_add; | |
801 | } | |
802 | ||
3fd27398 MD |
803 | lttng_relay_notify_ready(); |
804 | ||
9b5e0863 MD |
805 | if (testpoint(relayd_thread_listener)) { |
806 | goto error_testpoint; | |
807 | } | |
808 | ||
b8aa1682 | 809 | while (1) { |
f385ae0a MD |
810 | health_code_update(); |
811 | ||
b8aa1682 JD |
812 | DBG("Listener accepting connections"); |
813 | ||
b8aa1682 | 814 | restart: |
f385ae0a | 815 | health_poll_entry(); |
b8aa1682 | 816 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 817 | health_poll_exit(); |
b8aa1682 JD |
818 | if (ret < 0) { |
819 | /* | |
820 | * Restart interrupted system call. | |
821 | */ | |
822 | if (errno == EINTR) { | |
823 | goto restart; | |
824 | } | |
825 | goto error; | |
826 | } | |
827 | ||
0d9c5d77 DG |
828 | nb_fd = ret; |
829 | ||
b8aa1682 JD |
830 | DBG("Relay new connection received"); |
831 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
832 | health_code_update(); |
833 | ||
b8aa1682 JD |
834 | /* Fetch once the poll data */ |
835 | revents = LTTNG_POLL_GETEV(&events, i); | |
836 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
837 | ||
838 | /* Thread quit pipe has been closed. Killing thread. */ | |
839 | ret = check_thread_quit_pipe(pollfd, revents); | |
840 | if (ret) { | |
095a4ae5 MD |
841 | err = 0; |
842 | goto exit; | |
b8aa1682 JD |
843 | } |
844 | ||
845 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
846 | ERR("socket poll error"); | |
847 | goto error; | |
848 | } else if (revents & LPOLLIN) { | |
4b7f17b2 | 849 | /* |
58eb9381 DG |
850 | * Get allocated in this thread, enqueued to a global queue, |
851 | * dequeued and freed in the worker thread. | |
4b7f17b2 | 852 | */ |
58eb9381 DG |
853 | int val = 1; |
854 | struct relay_connection *new_conn; | |
4b7f17b2 | 855 | struct lttcomm_sock *newsock; |
b8aa1682 | 856 | |
58eb9381 DG |
857 | new_conn = connection_create(); |
858 | if (!new_conn) { | |
b8aa1682 JD |
859 | goto error; |
860 | } | |
861 | ||
862 | if (pollfd == data_sock->fd) { | |
58eb9381 | 863 | new_conn->type = RELAY_DATA; |
b8aa1682 | 864 | newsock = data_sock->ops->accept(data_sock); |
58eb9381 DG |
865 | DBG("Relay data connection accepted, socket %d", |
866 | newsock->fd); | |
4b7f17b2 MD |
867 | } else { |
868 | assert(pollfd == control_sock->fd); | |
58eb9381 | 869 | new_conn->type = RELAY_CONTROL; |
b8aa1682 | 870 | newsock = control_sock->ops->accept(control_sock); |
58eb9381 DG |
871 | DBG("Relay control connection accepted, socket %d", |
872 | newsock->fd); | |
b8aa1682 | 873 | } |
58eb9381 DG |
874 | if (!newsock) { |
875 | PERROR("accepting sock"); | |
876 | connection_free(new_conn); | |
877 | goto error; | |
878 | } | |
879 | ||
880 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
881 | sizeof(val)); | |
b8aa1682 JD |
882 | if (ret < 0) { |
883 | PERROR("setsockopt inet"); | |
4b7f17b2 | 884 | lttcomm_destroy_sock(newsock); |
58eb9381 | 885 | connection_free(new_conn); |
b8aa1682 JD |
886 | goto error; |
887 | } | |
58eb9381 DG |
888 | new_conn->sock = newsock; |
889 | ||
890 | /* Enqueue request for the dispatcher thread. */ | |
8bdee6e2 SM |
891 | cds_wfcq_enqueue(&relay_conn_queue.head, &relay_conn_queue.tail, |
892 | &new_conn->qnode); | |
b8aa1682 JD |
893 | |
894 | /* | |
58eb9381 | 895 | * Wake the dispatch queue futex. Implicit memory barrier with |
8bdee6e2 | 896 | * the exchange in cds_wfcq_enqueue. |
b8aa1682 | 897 | */ |
58eb9381 | 898 | futex_nto1_wake(&relay_conn_queue.futex); |
b8aa1682 JD |
899 | } |
900 | } | |
901 | } | |
902 | ||
095a4ae5 | 903 | exit: |
b8aa1682 JD |
904 | error: |
905 | error_poll_add: | |
9b5e0863 | 906 | error_testpoint: |
b8aa1682 JD |
907 | lttng_poll_clean(&events); |
908 | error_create_poll: | |
095a4ae5 MD |
909 | if (data_sock->fd >= 0) { |
910 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
911 | if (ret) { |
912 | PERROR("close"); | |
913 | } | |
b8aa1682 | 914 | } |
095a4ae5 MD |
915 | lttcomm_destroy_sock(data_sock); |
916 | error_sock_relay: | |
917 | if (control_sock->fd >= 0) { | |
918 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
919 | if (ret) { |
920 | PERROR("close"); | |
921 | } | |
b8aa1682 | 922 | } |
095a4ae5 MD |
923 | lttcomm_destroy_sock(control_sock); |
924 | error_sock_control: | |
925 | if (err) { | |
f385ae0a MD |
926 | health_error(); |
927 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 928 | } |
55706a7d | 929 | health_unregister(health_relayd); |
b8aa1682 JD |
930 | DBG("Relay listener thread cleanup complete"); |
931 | stop_threads(); | |
b8aa1682 JD |
932 | return NULL; |
933 | } | |
934 | ||
935 | /* | |
936 | * This thread manages the dispatching of the requests to worker threads | |
937 | */ | |
938 | static | |
939 | void *relay_thread_dispatcher(void *data) | |
940 | { | |
6cd525e8 MD |
941 | int err = -1; |
942 | ssize_t ret; | |
8bdee6e2 | 943 | struct cds_wfcq_node *node; |
58eb9381 | 944 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
945 | |
946 | DBG("[thread] Relay dispatcher started"); | |
947 | ||
55706a7d MD |
948 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
949 | ||
9b5e0863 MD |
950 | if (testpoint(relayd_thread_dispatcher)) { |
951 | goto error_testpoint; | |
952 | } | |
953 | ||
f385ae0a MD |
954 | health_code_update(); |
955 | ||
26c9d55e | 956 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
f385ae0a MD |
957 | health_code_update(); |
958 | ||
b8aa1682 | 959 | /* Atomically prepare the queue futex */ |
58eb9381 | 960 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 JD |
961 | |
962 | do { | |
f385ae0a MD |
963 | health_code_update(); |
964 | ||
b8aa1682 | 965 | /* Dequeue commands */ |
8bdee6e2 SM |
966 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
967 | &relay_conn_queue.tail); | |
b8aa1682 JD |
968 | if (node == NULL) { |
969 | DBG("Woken up but nothing in the relay command queue"); | |
970 | /* Continue thread execution */ | |
971 | break; | |
972 | } | |
58eb9381 | 973 | new_conn = caa_container_of(node, struct relay_connection, qnode); |
b8aa1682 | 974 | |
58eb9381 | 975 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
976 | |
977 | /* | |
58eb9381 DG |
978 | * Inform worker thread of the new request. This call is blocking |
979 | * so we can be assured that the data will be read at some point in | |
980 | * time or wait to the end of the world :) | |
b8aa1682 | 981 | */ |
58eb9381 DG |
982 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
983 | if (ret < 0) { | |
984 | PERROR("write connection pipe"); | |
985 | connection_destroy(new_conn); | |
b8aa1682 JD |
986 | goto error; |
987 | } | |
988 | } while (node != NULL); | |
989 | ||
990 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 991 | health_poll_entry(); |
58eb9381 | 992 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 993 | health_poll_exit(); |
b8aa1682 JD |
994 | } |
995 | ||
f385ae0a MD |
996 | /* Normal exit, no error */ |
997 | err = 0; | |
998 | ||
b8aa1682 | 999 | error: |
9b5e0863 | 1000 | error_testpoint: |
f385ae0a MD |
1001 | if (err) { |
1002 | health_error(); | |
1003 | ERR("Health error occurred in %s", __func__); | |
1004 | } | |
55706a7d | 1005 | health_unregister(health_relayd); |
b8aa1682 JD |
1006 | DBG("Dispatch thread dying"); |
1007 | stop_threads(); | |
1008 | return NULL; | |
1009 | } | |
1010 | ||
2a174661 | 1011 | static void try_close_streams(struct relay_session *session) |
d3e2ba59 | 1012 | { |
2a174661 | 1013 | struct ctf_trace *ctf_trace; |
94d49140 JD |
1014 | struct lttng_ht_iter iter; |
1015 | ||
2a174661 | 1016 | assert(session); |
94d49140 | 1017 | |
2a174661 DG |
1018 | pthread_mutex_lock(&session->viewer_ready_lock); |
1019 | rcu_read_lock(); | |
1020 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
1021 | node.node) { | |
1022 | struct relay_stream *stream; | |
94d49140 | 1023 | |
2a174661 DG |
1024 | /* Close streams. */ |
1025 | cds_list_for_each_entry(stream, &ctf_trace->stream_list, trace_list) { | |
1026 | stream_close(session, stream); | |
94d49140 | 1027 | } |
94d49140 | 1028 | |
2a174661 DG |
1029 | ctf_trace->invalid_flag = 1; |
1030 | ctf_trace_try_destroy(session, ctf_trace); | |
157df586 | 1031 | } |
2a174661 DG |
1032 | rcu_read_unlock(); |
1033 | pthread_mutex_unlock(&session->viewer_ready_lock); | |
94d49140 JD |
1034 | } |
1035 | ||
b8aa1682 | 1036 | /* |
2a174661 | 1037 | * Try to destroy a session within a connection. |
b8aa1682 | 1038 | */ |
58eb9381 | 1039 | static void destroy_session(struct relay_session *session, |
d3e2ba59 | 1040 | struct lttng_ht *sessions_ht) |
b8aa1682 | 1041 | { |
58eb9381 | 1042 | assert(session); |
2a174661 | 1043 | assert(sessions_ht); |
b8aa1682 | 1044 | |
2a174661 | 1045 | /* Indicate that this session can be destroyed from now on. */ |
58eb9381 | 1046 | session->close_flag = 1; |
b8aa1682 | 1047 | |
58eb9381 | 1048 | try_close_streams(session); |
5b6d8097 | 1049 | |
2a174661 DG |
1050 | /* |
1051 | * This will try to delete and destroy the session if no viewer is attached | |
1052 | * to it meaning the refcount is down to zero. | |
1053 | */ | |
58eb9381 | 1054 | session_try_destroy(sessions_ht, session); |
b8aa1682 JD |
1055 | } |
1056 | ||
1c20f0e2 JD |
1057 | /* |
1058 | * Copy index data from the control port to a given index object. | |
1059 | */ | |
1060 | static void copy_index_control_data(struct relay_index *index, | |
1061 | struct lttcomm_relayd_index *data) | |
1062 | { | |
1063 | assert(index); | |
1064 | assert(data); | |
1065 | ||
1066 | /* | |
1067 | * The index on disk is encoded in big endian, so we don't need to convert | |
1068 | * the data received on the network. The data_offset value is NEVER | |
1069 | * modified here and is updated by the data thread. | |
1070 | */ | |
1071 | index->index_data.packet_size = data->packet_size; | |
1072 | index->index_data.content_size = data->content_size; | |
1073 | index->index_data.timestamp_begin = data->timestamp_begin; | |
1074 | index->index_data.timestamp_end = data->timestamp_end; | |
1075 | index->index_data.events_discarded = data->events_discarded; | |
1076 | index->index_data.stream_id = data->stream_id; | |
1077 | } | |
1078 | ||
c5b6f4f0 DG |
1079 | /* |
1080 | * Handle the RELAYD_CREATE_SESSION command. | |
1081 | * | |
1082 | * On success, send back the session id or else return a negative value. | |
1083 | */ | |
1084 | static | |
1085 | int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1086 | struct relay_connection *conn) |
c5b6f4f0 DG |
1087 | { |
1088 | int ret = 0, send_ret; | |
1089 | struct relay_session *session; | |
1090 | struct lttcomm_relayd_status_session reply; | |
1091 | ||
1092 | assert(recv_hdr); | |
58eb9381 | 1093 | assert(conn); |
c5b6f4f0 DG |
1094 | |
1095 | memset(&reply, 0, sizeof(reply)); | |
1096 | ||
2a174661 DG |
1097 | session = session_create(); |
1098 | if (!session) { | |
c5b6f4f0 DG |
1099 | ret = -1; |
1100 | goto error; | |
1101 | } | |
58eb9381 DG |
1102 | session->minor = conn->minor; |
1103 | session->major = conn->major; | |
1104 | conn->session_id = session->id; | |
1105 | conn->session = session; | |
c5b6f4f0 DG |
1106 | |
1107 | reply.session_id = htobe64(session->id); | |
1108 | ||
58eb9381 | 1109 | switch (conn->minor) { |
2a174661 DG |
1110 | case 1: |
1111 | case 2: | |
1112 | case 3: | |
1113 | break; | |
1114 | case 4: /* LTTng sessiond 2.4 */ | |
1115 | default: | |
58eb9381 | 1116 | ret = cmd_create_session_2_4(conn, session); |
d3e2ba59 JD |
1117 | } |
1118 | ||
58eb9381 | 1119 | lttng_ht_add_unique_u64(conn->sessions_ht, &session->session_n); |
c5b6f4f0 DG |
1120 | DBG("Created session %" PRIu64, session->id); |
1121 | ||
1122 | error: | |
1123 | if (ret < 0) { | |
1124 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
1125 | } else { | |
1126 | reply.ret_code = htobe32(LTTNG_OK); | |
1127 | } | |
1128 | ||
58eb9381 | 1129 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c5b6f4f0 DG |
1130 | if (send_ret < 0) { |
1131 | ERR("Relayd sending session id"); | |
4169f5ad | 1132 | ret = send_ret; |
c5b6f4f0 DG |
1133 | } |
1134 | ||
1135 | return ret; | |
1136 | } | |
1137 | ||
a4baae1b JD |
1138 | /* |
1139 | * When we have received all the streams and the metadata for a channel, | |
1140 | * we make them visible to the viewer threads. | |
1141 | */ | |
1142 | static | |
58eb9381 | 1143 | void set_viewer_ready_flag(struct relay_connection *conn) |
a4baae1b | 1144 | { |
2a174661 | 1145 | struct relay_stream *stream, *tmp_stream; |
a4baae1b | 1146 | |
58eb9381 DG |
1147 | pthread_mutex_lock(&conn->session->viewer_ready_lock); |
1148 | cds_list_for_each_entry_safe(stream, tmp_stream, &conn->recv_head, | |
2a174661 | 1149 | recv_list) { |
a4baae1b | 1150 | stream->viewer_ready = 1; |
2a174661 | 1151 | cds_list_del(&stream->recv_list); |
a4baae1b | 1152 | } |
58eb9381 | 1153 | pthread_mutex_unlock(&conn->session->viewer_ready_lock); |
a4baae1b JD |
1154 | return; |
1155 | } | |
1156 | ||
1157 | /* | |
1158 | * Add a recv handle node to the connection recv list with the given stream | |
1159 | * handle. A new node is allocated thus must be freed when the node is deleted | |
1160 | * from the list. | |
1161 | */ | |
58eb9381 DG |
1162 | static void queue_stream(struct relay_stream *stream, |
1163 | struct relay_connection *conn) | |
a4baae1b | 1164 | { |
58eb9381 | 1165 | assert(conn); |
2a174661 | 1166 | assert(stream); |
a4baae1b | 1167 | |
58eb9381 | 1168 | cds_list_add(&stream->recv_list, &conn->recv_head); |
a4baae1b JD |
1169 | } |
1170 | ||
b8aa1682 JD |
1171 | /* |
1172 | * relay_add_stream: allocate a new stream for a session | |
1173 | */ | |
1174 | static | |
1175 | int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1176 | struct relay_connection *conn) |
b8aa1682 | 1177 | { |
2a174661 | 1178 | int ret, send_ret; |
58eb9381 | 1179 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1180 | struct relay_stream *stream = NULL; |
1181 | struct lttcomm_relayd_status_stream reply; | |
2a174661 | 1182 | struct ctf_trace *trace; |
b8aa1682 | 1183 | |
58eb9381 | 1184 | if (!session || conn->version_check_done == 0) { |
b8aa1682 JD |
1185 | ERR("Trying to add a stream before version check"); |
1186 | ret = -1; | |
1187 | goto end_no_session; | |
1188 | } | |
1189 | ||
b8aa1682 JD |
1190 | stream = zmalloc(sizeof(struct relay_stream)); |
1191 | if (stream == NULL) { | |
1192 | PERROR("relay stream zmalloc"); | |
1193 | ret = -1; | |
1194 | goto end_no_session; | |
1195 | } | |
1196 | ||
58eb9381 | 1197 | switch (conn->minor) { |
0f907de1 | 1198 | case 1: /* LTTng sessiond 2.1 */ |
58eb9381 | 1199 | ret = cmd_recv_stream_2_1(conn, stream); |
0f907de1 JD |
1200 | break; |
1201 | case 2: /* LTTng sessiond 2.2 */ | |
1202 | default: | |
58eb9381 | 1203 | ret = cmd_recv_stream_2_2(conn, stream); |
0f907de1 JD |
1204 | break; |
1205 | } | |
1206 | if (ret < 0) { | |
1207 | goto err_free_stream; | |
1208 | } | |
1209 | ||
9d1bbf21 | 1210 | rcu_read_lock(); |
b8aa1682 | 1211 | stream->stream_handle = ++last_relay_stream_id; |
173af62f | 1212 | stream->prev_seq = -1ULL; |
2a174661 | 1213 | stream->session_id = session->id; |
1c20f0e2 | 1214 | stream->index_fd = -1; |
d3e2ba59 | 1215 | stream->read_index_fd = -1; |
528f2ffa | 1216 | stream->ctf_stream_id = -1ULL; |
2a174661 | 1217 | lttng_ht_node_init_u64(&stream->node, stream->stream_handle); |
d3e2ba59 | 1218 | pthread_mutex_init(&stream->lock, NULL); |
b8aa1682 | 1219 | |
0f907de1 | 1220 | ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG); |
b8aa1682 | 1221 | if (ret < 0) { |
b8aa1682 JD |
1222 | ERR("relay creating output directory"); |
1223 | goto end; | |
1224 | } | |
1225 | ||
be96a7d1 DG |
1226 | /* |
1227 | * No need to use run_as API here because whatever we receives, the relayd | |
1228 | * uses its own credentials for the stream files. | |
1229 | */ | |
0f907de1 | 1230 | ret = utils_create_stream_file(stream->path_name, stream->channel_name, |
1c20f0e2 | 1231 | stream->tracefile_size, 0, relayd_uid, relayd_gid, NULL); |
b8aa1682 | 1232 | if (ret < 0) { |
0f907de1 | 1233 | ERR("Create output file"); |
b8aa1682 JD |
1234 | goto end; |
1235 | } | |
b8aa1682 | 1236 | stream->fd = ret; |
0f907de1 JD |
1237 | if (stream->tracefile_size) { |
1238 | DBG("Tracefile %s/%s_0 created", stream->path_name, stream->channel_name); | |
1239 | } else { | |
1240 | DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name); | |
1241 | } | |
b8aa1682 | 1242 | |
2a174661 DG |
1243 | trace = ctf_trace_find_by_path(session->ctf_traces_ht, stream->path_name); |
1244 | if (!trace) { | |
1245 | trace = ctf_trace_create(stream->path_name); | |
1246 | if (!trace) { | |
d3e2ba59 JD |
1247 | ret = -1; |
1248 | goto end; | |
1249 | } | |
2a174661 DG |
1250 | ctf_trace_add(session->ctf_traces_ht, trace); |
1251 | } | |
1252 | ctf_trace_get_ref(trace); | |
1253 | ||
1254 | if (!strncmp(stream->channel_name, DEFAULT_METADATA_NAME, NAME_MAX)) { | |
1255 | stream->metadata_flag = 1; | |
1256 | /* Assign quick reference to the metadata stream in the trace. */ | |
1257 | trace->metadata_stream = stream; | |
d3e2ba59 | 1258 | } |
d3e2ba59 | 1259 | |
a4baae1b | 1260 | /* |
2a174661 DG |
1261 | * Add the stream in the recv list of the connection. Once the end stream |
1262 | * message is received, this list is emptied and streams are set with the | |
1263 | * viewer ready flag. | |
a4baae1b | 1264 | */ |
58eb9381 | 1265 | queue_stream(stream, conn); |
a4baae1b | 1266 | |
2a174661 DG |
1267 | /* |
1268 | * Both in the ctf_trace object and the global stream ht since the data | |
1269 | * side of the relayd does not have the concept of session. | |
1270 | */ | |
1271 | lttng_ht_add_unique_u64(relay_streams_ht, &stream->node); | |
1272 | cds_list_add_tail(&stream->trace_list, &trace->stream_list); | |
b8aa1682 | 1273 | |
87b576ec | 1274 | session->stream_count++; |
d3e2ba59 | 1275 | |
1c20f0e2 JD |
1276 | DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, |
1277 | stream->stream_handle); | |
b8aa1682 JD |
1278 | |
1279 | end: | |
53efb85a | 1280 | memset(&reply, 0, sizeof(reply)); |
5af40280 | 1281 | reply.handle = htobe64(stream->stream_handle); |
b8aa1682 JD |
1282 | /* send the session id to the client or a negative return code on error */ |
1283 | if (ret < 0) { | |
f73fabfd | 1284 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5af40280 CB |
1285 | /* stream was not properly added to the ht, so free it */ |
1286 | free(stream); | |
b8aa1682 | 1287 | } else { |
f73fabfd | 1288 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1289 | } |
5af40280 | 1290 | |
58eb9381 | 1291 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1292 | sizeof(struct lttcomm_relayd_status_stream), 0); |
1293 | if (send_ret < 0) { | |
1294 | ERR("Relay sending stream id"); | |
4169f5ad | 1295 | ret = send_ret; |
b8aa1682 | 1296 | } |
9d1bbf21 | 1297 | rcu_read_unlock(); |
b8aa1682 JD |
1298 | |
1299 | end_no_session: | |
1300 | return ret; | |
0f907de1 JD |
1301 | |
1302 | err_free_stream: | |
1303 | free(stream->path_name); | |
1304 | free(stream->channel_name); | |
1305 | free(stream); | |
1306 | return ret; | |
b8aa1682 JD |
1307 | } |
1308 | ||
173af62f DG |
1309 | /* |
1310 | * relay_close_stream: close a specific stream | |
1311 | */ | |
1312 | static | |
1313 | int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1314 | struct relay_connection *conn) |
173af62f | 1315 | { |
94d49140 | 1316 | int ret, send_ret; |
58eb9381 | 1317 | struct relay_session *session = conn->session; |
173af62f DG |
1318 | struct lttcomm_relayd_close_stream stream_info; |
1319 | struct lttcomm_relayd_generic_reply reply; | |
1320 | struct relay_stream *stream; | |
173af62f DG |
1321 | |
1322 | DBG("Close stream received"); | |
1323 | ||
58eb9381 | 1324 | if (!session || conn->version_check_done == 0) { |
173af62f DG |
1325 | ERR("Trying to close a stream before version check"); |
1326 | ret = -1; | |
1327 | goto end_no_session; | |
1328 | } | |
1329 | ||
58eb9381 | 1330 | ret = conn->sock->ops->recvmsg(conn->sock, &stream_info, |
7c5aef62 | 1331 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f | 1332 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
a6cd2b97 DG |
1333 | if (ret == 0) { |
1334 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1335 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1336 | } else { |
1337 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
1338 | } | |
173af62f DG |
1339 | ret = -1; |
1340 | goto end_no_session; | |
1341 | } | |
1342 | ||
1343 | rcu_read_lock(); | |
2a174661 DG |
1344 | stream = stream_find_by_id(relay_streams_ht, |
1345 | be64toh(stream_info.stream_id)); | |
173af62f DG |
1346 | if (!stream) { |
1347 | ret = -1; | |
1348 | goto end_unlock; | |
1349 | } | |
1350 | ||
8e2583a4 | 1351 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
173af62f | 1352 | stream->close_flag = 1; |
87b576ec | 1353 | session->stream_count--; |
173af62f | 1354 | |
2a174661 DG |
1355 | /* Check if we can close it or else the data will do it. */ |
1356 | try_close_stream(session, stream); | |
173af62f DG |
1357 | |
1358 | end_unlock: | |
1359 | rcu_read_unlock(); | |
1360 | ||
53efb85a | 1361 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1362 | if (ret < 0) { |
f73fabfd | 1363 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1364 | } else { |
f73fabfd | 1365 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1366 | } |
58eb9381 | 1367 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f DG |
1368 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1369 | if (send_ret < 0) { | |
1370 | ERR("Relay sending stream id"); | |
4169f5ad | 1371 | ret = send_ret; |
173af62f DG |
1372 | } |
1373 | ||
1374 | end_no_session: | |
1375 | return ret; | |
1376 | } | |
1377 | ||
b8aa1682 JD |
1378 | /* |
1379 | * relay_unknown_command: send -1 if received unknown command | |
1380 | */ | |
1381 | static | |
58eb9381 | 1382 | void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1383 | { |
1384 | struct lttcomm_relayd_generic_reply reply; | |
1385 | int ret; | |
1386 | ||
53efb85a | 1387 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1388 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1389 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1390 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1391 | if (ret < 0) { | |
1392 | ERR("Relay sending unknown command"); | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * relay_start: send an acknowledgment to the client to tell if we are | |
1398 | * ready to receive data. We are ready if a session is established. | |
1399 | */ | |
1400 | static | |
1401 | int relay_start(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1402 | struct relay_connection *conn) |
b8aa1682 | 1403 | { |
f73fabfd | 1404 | int ret = htobe32(LTTNG_OK); |
b8aa1682 | 1405 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1406 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1407 | |
1408 | if (!session) { | |
1409 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1410 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1411 | } |
1412 | ||
53efb85a | 1413 | memset(&reply, 0, sizeof(reply)); |
b8aa1682 | 1414 | reply.ret_code = ret; |
58eb9381 | 1415 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1416 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1417 | if (ret < 0) { | |
1418 | ERR("Relay sending start ack"); | |
1419 | } | |
1420 | ||
1421 | return ret; | |
1422 | } | |
1423 | ||
1d4dfdef DG |
1424 | /* |
1425 | * Append padding to the file pointed by the file descriptor fd. | |
1426 | */ | |
1427 | static int write_padding_to_file(int fd, uint32_t size) | |
1428 | { | |
6cd525e8 | 1429 | ssize_t ret = 0; |
1d4dfdef DG |
1430 | char *zeros; |
1431 | ||
1432 | if (size == 0) { | |
1433 | goto end; | |
1434 | } | |
1435 | ||
1436 | zeros = zmalloc(size); | |
1437 | if (zeros == NULL) { | |
1438 | PERROR("zmalloc zeros for padding"); | |
1439 | ret = -1; | |
1440 | goto end; | |
1441 | } | |
1442 | ||
6cd525e8 MD |
1443 | ret = lttng_write(fd, zeros, size); |
1444 | if (ret < size) { | |
1d4dfdef DG |
1445 | PERROR("write padding to file"); |
1446 | } | |
1447 | ||
e986c7a1 DG |
1448 | free(zeros); |
1449 | ||
1d4dfdef DG |
1450 | end: |
1451 | return ret; | |
1452 | } | |
1453 | ||
b8aa1682 JD |
1454 | /* |
1455 | * relay_recv_metadata: receive the metada for the session. | |
1456 | */ | |
1457 | static | |
1458 | int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1459 | struct relay_connection *conn) |
b8aa1682 | 1460 | { |
f73fabfd | 1461 | int ret = htobe32(LTTNG_OK); |
6cd525e8 | 1462 | ssize_t size_ret; |
58eb9381 | 1463 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1464 | struct lttcomm_relayd_metadata_payload *metadata_struct; |
1465 | struct relay_stream *metadata_stream; | |
1466 | uint64_t data_size, payload_size; | |
2a174661 | 1467 | struct ctf_trace *ctf_trace; |
b8aa1682 JD |
1468 | |
1469 | if (!session) { | |
1470 | ERR("Metadata sent before version check"); | |
1471 | ret = -1; | |
1472 | goto end; | |
1473 | } | |
1474 | ||
f6416125 MD |
1475 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1476 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1477 | ERR("Incorrect data size"); | |
1478 | ret = -1; | |
1479 | goto end; | |
1480 | } | |
1481 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1482 | ||
b8aa1682 | 1483 | if (data_buffer_size < data_size) { |
d7b3776f | 1484 | /* In case the realloc fails, we can free the memory */ |
c617c0c6 MD |
1485 | char *tmp_data_ptr; |
1486 | ||
1487 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1488 | if (!tmp_data_ptr) { | |
b8aa1682 | 1489 | ERR("Allocating data buffer"); |
c617c0c6 | 1490 | free(data_buffer); |
b8aa1682 JD |
1491 | ret = -1; |
1492 | goto end; | |
1493 | } | |
c617c0c6 | 1494 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1495 | data_buffer_size = data_size; |
1496 | } | |
1497 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1498 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
58eb9381 | 1499 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0); |
b8aa1682 | 1500 | if (ret < 0 || ret != data_size) { |
a6cd2b97 DG |
1501 | if (ret == 0) { |
1502 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1503 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1504 | } else { |
1505 | ERR("Relay didn't receive the whole metadata"); | |
1506 | } | |
b8aa1682 | 1507 | ret = -1; |
b8aa1682 JD |
1508 | goto end; |
1509 | } | |
1510 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 MD |
1511 | |
1512 | rcu_read_lock(); | |
2a174661 | 1513 | metadata_stream = stream_find_by_id(relay_streams_ht, |
d3e2ba59 | 1514 | be64toh(metadata_struct->stream_id)); |
b8aa1682 JD |
1515 | if (!metadata_stream) { |
1516 | ret = -1; | |
9d1bbf21 | 1517 | goto end_unlock; |
b8aa1682 JD |
1518 | } |
1519 | ||
6cd525e8 MD |
1520 | size_ret = lttng_write(metadata_stream->fd, metadata_struct->payload, |
1521 | payload_size); | |
1522 | if (size_ret < payload_size) { | |
b8aa1682 JD |
1523 | ERR("Relay error writing metadata on file"); |
1524 | ret = -1; | |
9d1bbf21 | 1525 | goto end_unlock; |
b8aa1682 | 1526 | } |
1d4dfdef DG |
1527 | |
1528 | ret = write_padding_to_file(metadata_stream->fd, | |
1529 | be32toh(metadata_struct->padding_size)); | |
1530 | if (ret < 0) { | |
1531 | goto end_unlock; | |
1532 | } | |
2a174661 DG |
1533 | |
1534 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
1535 | metadata_stream->path_name); | |
1536 | assert(ctf_trace); | |
1537 | ctf_trace->metadata_received += | |
d3e2ba59 | 1538 | payload_size + be32toh(metadata_struct->padding_size); |
1d4dfdef | 1539 | |
b8aa1682 JD |
1540 | DBG2("Relay metadata written"); |
1541 | ||
9d1bbf21 | 1542 | end_unlock: |
6e3c5836 | 1543 | rcu_read_unlock(); |
b8aa1682 JD |
1544 | end: |
1545 | return ret; | |
1546 | } | |
1547 | ||
1548 | /* | |
1549 | * relay_send_version: send relayd version number | |
1550 | */ | |
1551 | static | |
1552 | int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1553 | struct relay_connection *conn) |
b8aa1682 | 1554 | { |
7f51dcba | 1555 | int ret; |
092b6259 | 1556 | struct lttcomm_relayd_version reply, msg; |
b8aa1682 | 1557 | |
58eb9381 | 1558 | assert(conn); |
c5b6f4f0 | 1559 | |
58eb9381 | 1560 | conn->version_check_done = 1; |
b8aa1682 | 1561 | |
092b6259 | 1562 | /* Get version from the other side. */ |
58eb9381 | 1563 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
092b6259 | 1564 | if (ret < 0 || ret != sizeof(msg)) { |
a6cd2b97 DG |
1565 | if (ret == 0) { |
1566 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1567 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1568 | } else { |
1569 | ERR("Relay failed to receive the version values."); | |
1570 | } | |
092b6259 | 1571 | ret = -1; |
092b6259 DG |
1572 | goto end; |
1573 | } | |
1574 | ||
53efb85a | 1575 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
1576 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1577 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1578 | |
1579 | /* Major versions must be the same */ | |
1580 | if (reply.major != be32toh(msg.major)) { | |
6151a90f JD |
1581 | DBG("Incompatible major versions (%u vs %u), deleting session", |
1582 | reply.major, be32toh(msg.major)); | |
58eb9381 | 1583 | destroy_session(conn->session, conn->sessions_ht); |
d4519fa3 JD |
1584 | ret = 0; |
1585 | goto end; | |
1586 | } | |
1587 | ||
58eb9381 | 1588 | conn->major = reply.major; |
0f907de1 JD |
1589 | /* We adapt to the lowest compatible version */ |
1590 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 1591 | conn->minor = reply.minor; |
0f907de1 | 1592 | } else { |
58eb9381 | 1593 | conn->minor = be32toh(msg.minor); |
0f907de1 JD |
1594 | } |
1595 | ||
6151a90f JD |
1596 | reply.major = htobe32(reply.major); |
1597 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 1598 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
6151a90f JD |
1599 | sizeof(struct lttcomm_relayd_version), 0); |
1600 | if (ret < 0) { | |
1601 | ERR("Relay sending version"); | |
1602 | } | |
1603 | ||
58eb9381 DG |
1604 | DBG("Version check done using protocol %u.%u", conn->major, |
1605 | conn->minor); | |
b8aa1682 JD |
1606 | |
1607 | end: | |
1608 | return ret; | |
1609 | } | |
1610 | ||
c8f59ee5 | 1611 | /* |
6d805429 | 1612 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 DG |
1613 | */ |
1614 | static | |
6d805429 | 1615 | int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1616 | struct relay_connection *conn) |
c8f59ee5 | 1617 | { |
58eb9381 | 1618 | struct relay_session *session = conn->session; |
6d805429 | 1619 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1620 | struct lttcomm_relayd_generic_reply reply; |
1621 | struct relay_stream *stream; | |
1622 | int ret; | |
c8f59ee5 DG |
1623 | uint64_t last_net_seq_num, stream_id; |
1624 | ||
6d805429 | 1625 | DBG("Data pending command received"); |
c8f59ee5 | 1626 | |
58eb9381 | 1627 | if (!session || conn->version_check_done == 0) { |
c8f59ee5 DG |
1628 | ERR("Trying to check for data before version check"); |
1629 | ret = -1; | |
1630 | goto end_no_session; | |
1631 | } | |
1632 | ||
58eb9381 | 1633 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1634 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1635 | if (ret == 0) { |
1636 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1637 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1638 | } else { |
1639 | ERR("Relay didn't receive valid data_pending struct size : %d", | |
1640 | ret); | |
1641 | } | |
c8f59ee5 DG |
1642 | ret = -1; |
1643 | goto end_no_session; | |
1644 | } | |
1645 | ||
1646 | stream_id = be64toh(msg.stream_id); | |
1647 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1648 | ||
1649 | rcu_read_lock(); | |
2a174661 | 1650 | stream = stream_find_by_id(relay_streams_ht, stream_id); |
de91f48a | 1651 | if (stream == NULL) { |
c8f59ee5 DG |
1652 | ret = -1; |
1653 | goto end_unlock; | |
1654 | } | |
1655 | ||
6d805429 | 1656 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1657 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1658 | last_net_seq_num); | |
1659 | ||
33832e64 | 1660 | /* Avoid wrapping issue */ |
39df6d9f | 1661 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) >= 0) { |
6d805429 | 1662 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1663 | ret = 0; |
6d805429 DG |
1664 | } else { |
1665 | /* Data still being streamed thus pending */ | |
1666 | ret = 1; | |
c8f59ee5 DG |
1667 | } |
1668 | ||
f7079f67 DG |
1669 | /* Pending check is now done. */ |
1670 | stream->data_pending_check_done = 1; | |
1671 | ||
c8f59ee5 DG |
1672 | end_unlock: |
1673 | rcu_read_unlock(); | |
1674 | ||
53efb85a | 1675 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1676 | reply.ret_code = htobe32(ret); |
58eb9381 | 1677 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1678 | if (ret < 0) { |
6d805429 | 1679 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1680 | } |
1681 | ||
1682 | end_no_session: | |
1683 | return ret; | |
1684 | } | |
1685 | ||
1686 | /* | |
1687 | * Wait for the control socket to reach a quiescent state. | |
1688 | * | |
1689 | * Note that for now, when receiving this command from the session daemon, this | |
1690 | * means that every subsequent commands or data received on the control socket | |
1691 | * has been handled. So, this is why we simply return OK here. | |
1692 | */ | |
1693 | static | |
1694 | int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1695 | struct relay_connection *conn) |
c8f59ee5 DG |
1696 | { |
1697 | int ret; | |
ad7051c0 DG |
1698 | uint64_t stream_id; |
1699 | struct relay_stream *stream; | |
1700 | struct lttng_ht_iter iter; | |
1701 | struct lttcomm_relayd_quiescent_control msg; | |
c8f59ee5 DG |
1702 | struct lttcomm_relayd_generic_reply reply; |
1703 | ||
1704 | DBG("Checking quiescent state on control socket"); | |
1705 | ||
58eb9381 | 1706 | if (!conn->session || conn->version_check_done == 0) { |
ad7051c0 DG |
1707 | ERR("Trying to check for data before version check"); |
1708 | ret = -1; | |
1709 | goto end_no_session; | |
1710 | } | |
1711 | ||
58eb9381 | 1712 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
ad7051c0 | 1713 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1714 | if (ret == 0) { |
1715 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1716 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1717 | } else { |
1718 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1719 | ret); | |
1720 | } | |
ad7051c0 DG |
1721 | ret = -1; |
1722 | goto end_no_session; | |
1723 | } | |
1724 | ||
1725 | stream_id = be64toh(msg.stream_id); | |
1726 | ||
1727 | rcu_read_lock(); | |
d3e2ba59 | 1728 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1729 | node.node) { |
ad7051c0 DG |
1730 | if (stream->stream_handle == stream_id) { |
1731 | stream->data_pending_check_done = 1; | |
1732 | DBG("Relay quiescent control pending flag set to %" PRIu64, | |
1733 | stream_id); | |
1734 | break; | |
1735 | } | |
1736 | } | |
1737 | rcu_read_unlock(); | |
1738 | ||
53efb85a | 1739 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1740 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 1741 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1742 | if (ret < 0) { |
6d805429 | 1743 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1744 | } |
1745 | ||
ad7051c0 | 1746 | end_no_session: |
c8f59ee5 DG |
1747 | return ret; |
1748 | } | |
1749 | ||
f7079f67 DG |
1750 | /* |
1751 | * Initialize a data pending command. This means that a client is about to ask | |
1752 | * for data pending for each stream he/she holds. Simply iterate over all | |
1753 | * streams of a session and set the data_pending_check_done flag. | |
1754 | * | |
1755 | * This command returns to the client a LTTNG_OK code. | |
1756 | */ | |
1757 | static | |
1758 | int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1759 | struct relay_connection *conn) |
f7079f67 DG |
1760 | { |
1761 | int ret; | |
1762 | struct lttng_ht_iter iter; | |
1763 | struct lttcomm_relayd_begin_data_pending msg; | |
1764 | struct lttcomm_relayd_generic_reply reply; | |
1765 | struct relay_stream *stream; | |
1766 | uint64_t session_id; | |
1767 | ||
1768 | assert(recv_hdr); | |
58eb9381 | 1769 | assert(conn); |
f7079f67 DG |
1770 | |
1771 | DBG("Init streams for data pending"); | |
1772 | ||
58eb9381 | 1773 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1774 | ERR("Trying to check for data before version check"); |
1775 | ret = -1; | |
1776 | goto end_no_session; | |
1777 | } | |
1778 | ||
58eb9381 | 1779 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1780 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1781 | if (ret == 0) { |
1782 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1783 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1784 | } else { |
1785 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1786 | ret); | |
1787 | } | |
f7079f67 DG |
1788 | ret = -1; |
1789 | goto end_no_session; | |
1790 | } | |
1791 | ||
1792 | session_id = be64toh(msg.session_id); | |
1793 | ||
1794 | /* | |
1795 | * Iterate over all streams to set the begin data pending flag. For now, the | |
1796 | * streams are indexed by stream handle so we have to iterate over all | |
1797 | * streams to find the one associated with the right session_id. | |
1798 | */ | |
1799 | rcu_read_lock(); | |
d3e2ba59 | 1800 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 DG |
1801 | node.node) { |
1802 | if (stream->session_id == session_id) { | |
f7079f67 DG |
1803 | stream->data_pending_check_done = 0; |
1804 | DBG("Set begin data pending flag to stream %" PRIu64, | |
1805 | stream->stream_handle); | |
1806 | } | |
1807 | } | |
1808 | rcu_read_unlock(); | |
1809 | ||
53efb85a | 1810 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1811 | /* All good, send back reply. */ |
1812 | reply.ret_code = htobe32(LTTNG_OK); | |
1813 | ||
58eb9381 | 1814 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1815 | if (ret < 0) { |
1816 | ERR("Relay begin data pending send reply failed"); | |
1817 | } | |
1818 | ||
1819 | end_no_session: | |
1820 | return ret; | |
1821 | } | |
1822 | ||
1823 | /* | |
1824 | * End data pending command. This will check, for a given session id, if each | |
1825 | * stream associated with it has its data_pending_check_done flag set. If not, | |
1826 | * this means that the client lost track of the stream but the data is still | |
1827 | * being streamed on our side. In this case, we inform the client that data is | |
1828 | * inflight. | |
1829 | * | |
1830 | * Return to the client if there is data in flight or not with a ret_code. | |
1831 | */ | |
1832 | static | |
1833 | int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1834 | struct relay_connection *conn) |
f7079f67 DG |
1835 | { |
1836 | int ret; | |
1837 | struct lttng_ht_iter iter; | |
1838 | struct lttcomm_relayd_end_data_pending msg; | |
1839 | struct lttcomm_relayd_generic_reply reply; | |
1840 | struct relay_stream *stream; | |
1841 | uint64_t session_id; | |
1842 | uint32_t is_data_inflight = 0; | |
1843 | ||
1844 | assert(recv_hdr); | |
58eb9381 | 1845 | assert(conn); |
f7079f67 DG |
1846 | |
1847 | DBG("End data pending command"); | |
1848 | ||
58eb9381 | 1849 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1850 | ERR("Trying to check for data before version check"); |
1851 | ret = -1; | |
1852 | goto end_no_session; | |
1853 | } | |
1854 | ||
58eb9381 | 1855 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1856 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1857 | if (ret == 0) { |
1858 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1859 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1860 | } else { |
1861 | ERR("Relay didn't receive valid end data_pending struct size: %d", | |
1862 | ret); | |
1863 | } | |
f7079f67 DG |
1864 | ret = -1; |
1865 | goto end_no_session; | |
1866 | } | |
1867 | ||
1868 | session_id = be64toh(msg.session_id); | |
1869 | ||
1870 | /* Iterate over all streams to see if the begin data pending flag is set. */ | |
1871 | rcu_read_lock(); | |
d3e2ba59 | 1872 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 DG |
1873 | node.node) { |
1874 | if (stream->session_id == session_id && | |
f94b19e6 | 1875 | !stream->data_pending_check_done && !stream->terminated_flag) { |
f7079f67 DG |
1876 | is_data_inflight = 1; |
1877 | DBG("Data is still in flight for stream %" PRIu64, | |
1878 | stream->stream_handle); | |
1879 | break; | |
1880 | } | |
1881 | } | |
1882 | rcu_read_unlock(); | |
1883 | ||
53efb85a | 1884 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1885 | /* All good, send back reply. */ |
1886 | reply.ret_code = htobe32(is_data_inflight); | |
1887 | ||
58eb9381 | 1888 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1889 | if (ret < 0) { |
1890 | ERR("Relay end data pending send reply failed"); | |
1891 | } | |
1892 | ||
1893 | end_no_session: | |
1894 | return ret; | |
1895 | } | |
1896 | ||
1c20f0e2 JD |
1897 | /* |
1898 | * Receive an index for a specific stream. | |
1899 | * | |
1900 | * Return 0 on success else a negative value. | |
1901 | */ | |
1902 | static | |
1903 | int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 1904 | struct relay_connection *conn) |
1c20f0e2 JD |
1905 | { |
1906 | int ret, send_ret, index_created = 0; | |
58eb9381 | 1907 | struct relay_session *session = conn->session; |
1c20f0e2 JD |
1908 | struct lttcomm_relayd_index index_info; |
1909 | struct relay_index *index, *wr_index = NULL; | |
1910 | struct lttcomm_relayd_generic_reply reply; | |
1911 | struct relay_stream *stream; | |
1912 | uint64_t net_seq_num; | |
1913 | ||
58eb9381 | 1914 | assert(conn); |
1c20f0e2 JD |
1915 | |
1916 | DBG("Relay receiving index"); | |
1917 | ||
58eb9381 | 1918 | if (!session || conn->version_check_done == 0) { |
1c20f0e2 JD |
1919 | ERR("Trying to close a stream before version check"); |
1920 | ret = -1; | |
1921 | goto end_no_session; | |
1922 | } | |
1923 | ||
58eb9381 | 1924 | ret = conn->sock->ops->recvmsg(conn->sock, &index_info, |
1c20f0e2 JD |
1925 | sizeof(index_info), 0); |
1926 | if (ret < sizeof(index_info)) { | |
1927 | if (ret == 0) { | |
1928 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1929 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
1c20f0e2 JD |
1930 | } else { |
1931 | ERR("Relay didn't receive valid index struct size : %d", ret); | |
1932 | } | |
1933 | ret = -1; | |
1934 | goto end_no_session; | |
1935 | } | |
1936 | ||
1937 | net_seq_num = be64toh(index_info.net_seq_num); | |
1938 | ||
1939 | rcu_read_lock(); | |
2a174661 DG |
1940 | stream = stream_find_by_id(relay_streams_ht, |
1941 | be64toh(index_info.relay_stream_id)); | |
1c20f0e2 JD |
1942 | if (!stream) { |
1943 | ret = -1; | |
1944 | goto end_rcu_unlock; | |
1945 | } | |
1946 | ||
d3e2ba59 JD |
1947 | /* Live beacon handling */ |
1948 | if (index_info.packet_size == 0) { | |
1949 | DBG("Received live beacon for stream %" PRIu64, stream->stream_handle); | |
1950 | ||
1951 | /* | |
6e7241fe JD |
1952 | * Only flag a stream inactive when it has already received data |
1953 | * and no indexes are in flight. | |
d3e2ba59 | 1954 | */ |
6e7241fe | 1955 | if (stream->total_index_received > 0 && stream->indexes_in_flight == 0) { |
d3e2ba59 JD |
1956 | stream->beacon_ts_end = be64toh(index_info.timestamp_end); |
1957 | } | |
1958 | ret = 0; | |
1959 | goto end_rcu_unlock; | |
1960 | } else { | |
1961 | stream->beacon_ts_end = -1ULL; | |
1962 | } | |
1963 | ||
0a6518b0 | 1964 | index = relay_index_find(stream->stream_handle, net_seq_num); |
1c20f0e2 JD |
1965 | if (!index) { |
1966 | /* A successful creation will add the object to the HT. */ | |
1967 | index = relay_index_create(stream->stream_handle, net_seq_num); | |
1968 | if (!index) { | |
1969 | goto end_rcu_unlock; | |
1970 | } | |
1971 | index_created = 1; | |
6e7241fe | 1972 | stream->indexes_in_flight++; |
1c20f0e2 JD |
1973 | } |
1974 | ||
1975 | copy_index_control_data(index, &index_info); | |
528f2ffa JD |
1976 | if (stream->ctf_stream_id == -1ULL) { |
1977 | stream->ctf_stream_id = be64toh(index_info.stream_id); | |
1978 | } | |
1c20f0e2 JD |
1979 | |
1980 | if (index_created) { | |
1981 | /* | |
1982 | * Try to add the relay index object to the hash table. If an object | |
1983 | * already exist, destroy back the index created, set the data in this | |
1984 | * object and write it on disk. | |
1985 | */ | |
0a6518b0 | 1986 | relay_index_add(index, &wr_index); |
1c20f0e2 JD |
1987 | if (wr_index) { |
1988 | copy_index_control_data(wr_index, &index_info); | |
1989 | free(index); | |
1990 | } | |
1991 | } else { | |
1992 | /* The index already exists so write it on disk. */ | |
1993 | wr_index = index; | |
1994 | } | |
1995 | ||
1996 | /* Do we have a writable ready index to write on disk. */ | |
1997 | if (wr_index) { | |
0a6518b0 | 1998 | ret = relay_index_write(wr_index->fd, wr_index); |
1c20f0e2 JD |
1999 | if (ret < 0) { |
2000 | goto end_rcu_unlock; | |
2001 | } | |
d3e2ba59 | 2002 | stream->total_index_received++; |
6e7241fe JD |
2003 | stream->indexes_in_flight--; |
2004 | assert(stream->indexes_in_flight >= 0); | |
1c20f0e2 JD |
2005 | } |
2006 | ||
2007 | end_rcu_unlock: | |
2008 | rcu_read_unlock(); | |
2009 | ||
53efb85a | 2010 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
2011 | if (ret < 0) { |
2012 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
2013 | } else { | |
2014 | reply.ret_code = htobe32(LTTNG_OK); | |
2015 | } | |
58eb9381 | 2016 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1c20f0e2 JD |
2017 | if (send_ret < 0) { |
2018 | ERR("Relay sending close index id reply"); | |
2019 | ret = send_ret; | |
2020 | } | |
2021 | ||
2022 | end_no_session: | |
2023 | return ret; | |
2024 | } | |
2025 | ||
a4baae1b JD |
2026 | /* |
2027 | * Receive the streams_sent message. | |
2028 | * | |
2029 | * Return 0 on success else a negative value. | |
2030 | */ | |
2031 | static | |
2032 | int relay_streams_sent(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 2033 | struct relay_connection *conn) |
a4baae1b JD |
2034 | { |
2035 | int ret, send_ret; | |
2036 | struct lttcomm_relayd_generic_reply reply; | |
2037 | ||
58eb9381 | 2038 | assert(conn); |
a4baae1b JD |
2039 | |
2040 | DBG("Relay receiving streams_sent"); | |
2041 | ||
58eb9381 | 2042 | if (!conn->session || conn->version_check_done == 0) { |
a4baae1b JD |
2043 | ERR("Trying to close a stream before version check"); |
2044 | ret = -1; | |
2045 | goto end_no_session; | |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * Flag every pending stream in the connection recv list that they are | |
2050 | * ready to be used by the viewer. | |
2051 | */ | |
58eb9381 | 2052 | set_viewer_ready_flag(conn); |
a4baae1b | 2053 | |
4a9daf17 JD |
2054 | /* |
2055 | * Inform the viewer that there are new streams in the session. | |
2056 | */ | |
c5141fe5 JD |
2057 | if (conn->session->viewer_refcount) { |
2058 | uatomic_set(&conn->session->new_streams, 1); | |
2059 | } | |
4a9daf17 | 2060 | |
53efb85a | 2061 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2062 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2063 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
a4baae1b JD |
2064 | if (send_ret < 0) { |
2065 | ERR("Relay sending sent_stream reply"); | |
2066 | ret = send_ret; | |
2067 | } else { | |
2068 | /* Success. */ | |
2069 | ret = 0; | |
2070 | } | |
2071 | ||
2072 | end_no_session: | |
2073 | return ret; | |
2074 | } | |
2075 | ||
b8aa1682 | 2076 | /* |
d3e2ba59 | 2077 | * Process the commands received on the control socket |
b8aa1682 JD |
2078 | */ |
2079 | static | |
2080 | int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, | |
58eb9381 | 2081 | struct relay_connection *conn) |
b8aa1682 JD |
2082 | { |
2083 | int ret = 0; | |
2084 | ||
2085 | switch (be32toh(recv_hdr->cmd)) { | |
b8aa1682 | 2086 | case RELAYD_CREATE_SESSION: |
58eb9381 | 2087 | ret = relay_create_session(recv_hdr, conn); |
b8aa1682 | 2088 | break; |
b8aa1682 | 2089 | case RELAYD_ADD_STREAM: |
58eb9381 | 2090 | ret = relay_add_stream(recv_hdr, conn); |
b8aa1682 JD |
2091 | break; |
2092 | case RELAYD_START_DATA: | |
58eb9381 | 2093 | ret = relay_start(recv_hdr, conn); |
b8aa1682 JD |
2094 | break; |
2095 | case RELAYD_SEND_METADATA: | |
58eb9381 | 2096 | ret = relay_recv_metadata(recv_hdr, conn); |
b8aa1682 JD |
2097 | break; |
2098 | case RELAYD_VERSION: | |
58eb9381 | 2099 | ret = relay_send_version(recv_hdr, conn); |
b8aa1682 | 2100 | break; |
173af62f | 2101 | case RELAYD_CLOSE_STREAM: |
58eb9381 | 2102 | ret = relay_close_stream(recv_hdr, conn); |
173af62f | 2103 | break; |
6d805429 | 2104 | case RELAYD_DATA_PENDING: |
58eb9381 | 2105 | ret = relay_data_pending(recv_hdr, conn); |
c8f59ee5 DG |
2106 | break; |
2107 | case RELAYD_QUIESCENT_CONTROL: | |
58eb9381 | 2108 | ret = relay_quiescent_control(recv_hdr, conn); |
c8f59ee5 | 2109 | break; |
f7079f67 | 2110 | case RELAYD_BEGIN_DATA_PENDING: |
58eb9381 | 2111 | ret = relay_begin_data_pending(recv_hdr, conn); |
f7079f67 DG |
2112 | break; |
2113 | case RELAYD_END_DATA_PENDING: | |
58eb9381 | 2114 | ret = relay_end_data_pending(recv_hdr, conn); |
f7079f67 | 2115 | break; |
1c20f0e2 | 2116 | case RELAYD_SEND_INDEX: |
58eb9381 | 2117 | ret = relay_recv_index(recv_hdr, conn); |
1c20f0e2 | 2118 | break; |
a4baae1b | 2119 | case RELAYD_STREAMS_SENT: |
58eb9381 | 2120 | ret = relay_streams_sent(recv_hdr, conn); |
a4baae1b | 2121 | break; |
b8aa1682 JD |
2122 | case RELAYD_UPDATE_SYNC_INFO: |
2123 | default: | |
2124 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
58eb9381 | 2125 | relay_unknown_command(conn); |
b8aa1682 JD |
2126 | ret = -1; |
2127 | goto end; | |
2128 | } | |
2129 | ||
2130 | end: | |
2131 | return ret; | |
2132 | } | |
2133 | ||
7d2f7452 DG |
2134 | /* |
2135 | * Handle index for a data stream. | |
2136 | * | |
2137 | * RCU read side lock MUST be acquired. | |
2138 | * | |
2139 | * Return 0 on success else a negative value. | |
2140 | */ | |
2141 | static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num, | |
2142 | int rotate_index) | |
2143 | { | |
2144 | int ret = 0, index_created = 0; | |
2145 | uint64_t stream_id, data_offset; | |
2146 | struct relay_index *index, *wr_index = NULL; | |
2147 | ||
2148 | assert(stream); | |
2149 | ||
2150 | stream_id = stream->stream_handle; | |
2151 | /* Get data offset because we are about to update the index. */ | |
2152 | data_offset = htobe64(stream->tracefile_size_current); | |
2153 | ||
2154 | /* | |
2155 | * Lookup for an existing index for that stream id/sequence number. If on | |
2156 | * exists, the control thread already received the data for it thus we need | |
2157 | * to write it on disk. | |
2158 | */ | |
2159 | index = relay_index_find(stream_id, net_seq_num); | |
2160 | if (!index) { | |
2161 | /* A successful creation will add the object to the HT. */ | |
2162 | index = relay_index_create(stream_id, net_seq_num); | |
2163 | if (!index) { | |
2164 | ret = -1; | |
2165 | goto error; | |
2166 | } | |
2167 | index_created = 1; | |
6e7241fe | 2168 | stream->indexes_in_flight++; |
7d2f7452 DG |
2169 | } |
2170 | ||
2171 | if (rotate_index || stream->index_fd < 0) { | |
2172 | index->to_close_fd = stream->index_fd; | |
2173 | ret = index_create_file(stream->path_name, stream->channel_name, | |
2174 | relayd_uid, relayd_gid, stream->tracefile_size, | |
2175 | stream->tracefile_count_current); | |
2176 | if (ret < 0) { | |
2177 | /* This will close the stream's index fd if one. */ | |
2178 | relay_index_free_safe(index); | |
2179 | goto error; | |
2180 | } | |
2181 | stream->index_fd = ret; | |
2182 | } | |
2183 | index->fd = stream->index_fd; | |
2184 | index->index_data.offset = data_offset; | |
2185 | ||
2186 | if (index_created) { | |
2187 | /* | |
2188 | * Try to add the relay index object to the hash table. If an object | |
2189 | * already exist, destroy back the index created and set the data. | |
2190 | */ | |
2191 | relay_index_add(index, &wr_index); | |
2192 | if (wr_index) { | |
2193 | /* Copy back data from the created index. */ | |
2194 | wr_index->fd = index->fd; | |
2195 | wr_index->to_close_fd = index->to_close_fd; | |
2196 | wr_index->index_data.offset = data_offset; | |
2197 | free(index); | |
2198 | } | |
2199 | } else { | |
2200 | /* The index already exists so write it on disk. */ | |
2201 | wr_index = index; | |
2202 | } | |
2203 | ||
2204 | /* Do we have a writable ready index to write on disk. */ | |
2205 | if (wr_index) { | |
2206 | ret = relay_index_write(wr_index->fd, wr_index); | |
2207 | if (ret < 0) { | |
2208 | goto error; | |
2209 | } | |
2210 | stream->total_index_received++; | |
6e7241fe JD |
2211 | stream->indexes_in_flight--; |
2212 | assert(stream->indexes_in_flight >= 0); | |
7d2f7452 DG |
2213 | } |
2214 | ||
2215 | error: | |
2216 | return ret; | |
2217 | } | |
2218 | ||
b8aa1682 JD |
2219 | /* |
2220 | * relay_process_data: Process the data received on the data socket | |
2221 | */ | |
2222 | static | |
58eb9381 | 2223 | int relay_process_data(struct relay_connection *conn) |
b8aa1682 | 2224 | { |
7d2f7452 | 2225 | int ret = 0, rotate_index = 0; |
6cd525e8 | 2226 | ssize_t size_ret; |
b8aa1682 JD |
2227 | struct relay_stream *stream; |
2228 | struct lttcomm_relayd_data_hdr data_hdr; | |
7d2f7452 | 2229 | uint64_t stream_id; |
173af62f | 2230 | uint64_t net_seq_num; |
b8aa1682 | 2231 | uint32_t data_size; |
2a174661 | 2232 | struct relay_session *session; |
b8aa1682 | 2233 | |
58eb9381 DG |
2234 | assert(conn); |
2235 | ||
2236 | ret = conn->sock->ops->recvmsg(conn->sock, &data_hdr, | |
7c5aef62 | 2237 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 | 2238 | if (ret <= 0) { |
a6cd2b97 DG |
2239 | if (ret == 0) { |
2240 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2241 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 | 2242 | } else { |
58eb9381 | 2243 | ERR("Unable to receive data header on sock %d", conn->sock->fd); |
a6cd2b97 | 2244 | } |
b8aa1682 JD |
2245 | ret = -1; |
2246 | goto end; | |
2247 | } | |
2248 | ||
2249 | stream_id = be64toh(data_hdr.stream_id); | |
9d1bbf21 MD |
2250 | |
2251 | rcu_read_lock(); | |
2a174661 | 2252 | stream = stream_find_by_id(relay_streams_ht, stream_id); |
b8aa1682 JD |
2253 | if (!stream) { |
2254 | ret = -1; | |
1c20f0e2 | 2255 | goto end_rcu_unlock; |
b8aa1682 JD |
2256 | } |
2257 | ||
58eb9381 | 2258 | session = session_find_by_id(conn->sessions_ht, stream->session_id); |
2a174661 DG |
2259 | assert(session); |
2260 | ||
b8aa1682 JD |
2261 | data_size = be32toh(data_hdr.data_size); |
2262 | if (data_buffer_size < data_size) { | |
c617c0c6 MD |
2263 | char *tmp_data_ptr; |
2264 | ||
2265 | tmp_data_ptr = realloc(data_buffer, data_size); | |
2266 | if (!tmp_data_ptr) { | |
b8aa1682 | 2267 | ERR("Allocating data buffer"); |
c617c0c6 | 2268 | free(data_buffer); |
b8aa1682 | 2269 | ret = -1; |
1c20f0e2 | 2270 | goto end_rcu_unlock; |
b8aa1682 | 2271 | } |
c617c0c6 | 2272 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
2273 | data_buffer_size = data_size; |
2274 | } | |
2275 | memset(data_buffer, 0, data_size); | |
2276 | ||
173af62f DG |
2277 | net_seq_num = be64toh(data_hdr.net_seq_num); |
2278 | ||
77c7c900 | 2279 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 2280 | data_size, stream_id, net_seq_num); |
58eb9381 | 2281 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0); |
b8aa1682 | 2282 | if (ret <= 0) { |
a6cd2b97 DG |
2283 | if (ret == 0) { |
2284 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2285 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 | 2286 | } |
b8aa1682 | 2287 | ret = -1; |
1c20f0e2 | 2288 | goto end_rcu_unlock; |
b8aa1682 JD |
2289 | } |
2290 | ||
1c20f0e2 | 2291 | /* Check if a rotation is needed. */ |
0f907de1 JD |
2292 | if (stream->tracefile_size > 0 && |
2293 | (stream->tracefile_size_current + data_size) > | |
2294 | stream->tracefile_size) { | |
6b6b9a5a JD |
2295 | struct relay_viewer_stream *vstream; |
2296 | uint64_t new_id; | |
2297 | ||
2298 | new_id = (stream->tracefile_count_current + 1) % | |
2299 | stream->tracefile_count; | |
2300 | /* | |
2301 | * When we wrap-around back to 0, we start overwriting old | |
2302 | * trace data. | |
2303 | */ | |
2304 | if (!stream->tracefile_overwrite && new_id == 0) { | |
2305 | stream->tracefile_overwrite = 1; | |
2306 | } | |
2307 | pthread_mutex_lock(&stream->viewer_stream_rotation_lock); | |
2308 | if (stream->tracefile_overwrite) { | |
2309 | stream->oldest_tracefile_id = | |
2310 | (stream->oldest_tracefile_id + 1) % | |
2311 | stream->tracefile_count; | |
2312 | } | |
2f8f53af | 2313 | vstream = viewer_stream_find_by_id(stream->stream_handle); |
6b6b9a5a JD |
2314 | if (vstream) { |
2315 | /* | |
2316 | * The viewer is reading a file about to be | |
2317 | * overwritten. Close the FDs it is | |
2318 | * currently using and let it handle the fault. | |
2319 | */ | |
2320 | if (vstream->tracefile_count_current == new_id) { | |
cef0f7d5 | 2321 | pthread_mutex_lock(&vstream->overwrite_lock); |
6b6b9a5a | 2322 | vstream->abort_flag = 1; |
cef0f7d5 | 2323 | pthread_mutex_unlock(&vstream->overwrite_lock); |
6b6b9a5a JD |
2324 | DBG("Streaming side setting abort_flag on stream %s_%lu\n", |
2325 | stream->channel_name, new_id); | |
2326 | } else if (vstream->tracefile_count_current == | |
2327 | stream->tracefile_count_current) { | |
2328 | /* | |
2329 | * The reader and writer were in the | |
2330 | * same trace file, inform the viewer | |
2331 | * that no new index will ever be added | |
2332 | * to this file. | |
2333 | */ | |
2334 | vstream->close_write_flag = 1; | |
2335 | } | |
2336 | } | |
1c20f0e2 JD |
2337 | ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, |
2338 | stream->tracefile_size, stream->tracefile_count, | |
2339 | relayd_uid, relayd_gid, stream->fd, | |
2340 | &(stream->tracefile_count_current), &stream->fd); | |
6b6b9a5a | 2341 | pthread_mutex_unlock(&stream->viewer_stream_rotation_lock); |
0f907de1 | 2342 | if (ret < 0) { |
1c20f0e2 JD |
2343 | ERR("Rotating stream output file"); |
2344 | goto end_rcu_unlock; | |
0f907de1 | 2345 | } |
a6976990 DG |
2346 | /* Reset current size because we just perform a stream rotation. */ |
2347 | stream->tracefile_size_current = 0; | |
1c20f0e2 JD |
2348 | rotate_index = 1; |
2349 | } | |
2350 | ||
1c20f0e2 | 2351 | /* |
7d2f7452 DG |
2352 | * Index are handled in protocol version 2.4 and above. Also, snapshot and |
2353 | * index are NOT supported. | |
1c20f0e2 | 2354 | */ |
2a174661 | 2355 | if (session->minor >= 4 && !session->snapshot) { |
7d2f7452 | 2356 | ret = handle_index_data(stream, net_seq_num, rotate_index); |
1c20f0e2 | 2357 | if (ret < 0) { |
1c20f0e2 JD |
2358 | goto end_rcu_unlock; |
2359 | } | |
1c20f0e2 JD |
2360 | } |
2361 | ||
7d2f7452 | 2362 | /* Write data to stream output fd. */ |
6cd525e8 MD |
2363 | size_ret = lttng_write(stream->fd, data_buffer, data_size); |
2364 | if (size_ret < data_size) { | |
b8aa1682 JD |
2365 | ERR("Relay error writing data to file"); |
2366 | ret = -1; | |
1c20f0e2 | 2367 | goto end_rcu_unlock; |
b8aa1682 | 2368 | } |
1d4dfdef | 2369 | |
5ab7344e JD |
2370 | DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64, |
2371 | ret, stream->stream_handle); | |
2372 | ||
1d4dfdef DG |
2373 | ret = write_padding_to_file(stream->fd, be32toh(data_hdr.padding_size)); |
2374 | if (ret < 0) { | |
1c20f0e2 | 2375 | goto end_rcu_unlock; |
1d4dfdef | 2376 | } |
1c20f0e2 | 2377 | stream->tracefile_size_current += data_size + be32toh(data_hdr.padding_size); |
1d4dfdef | 2378 | |
173af62f DG |
2379 | stream->prev_seq = net_seq_num; |
2380 | ||
2a174661 | 2381 | try_close_stream(session, stream); |
173af62f | 2382 | |
1c20f0e2 | 2383 | end_rcu_unlock: |
9d1bbf21 | 2384 | rcu_read_unlock(); |
b8aa1682 JD |
2385 | end: |
2386 | return ret; | |
2387 | } | |
2388 | ||
2389 | static | |
58eb9381 | 2390 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
2391 | { |
2392 | int ret; | |
2393 | ||
58eb9381 DG |
2394 | assert(events); |
2395 | ||
2396 | (void) lttng_poll_del(events, pollfd); | |
b8aa1682 JD |
2397 | |
2398 | ret = close(pollfd); | |
2399 | if (ret < 0) { | |
2400 | ERR("Closing pollfd %d", pollfd); | |
2401 | } | |
2402 | } | |
2403 | ||
58eb9381 DG |
2404 | static void destroy_connection(struct lttng_ht *relay_connections_ht, |
2405 | struct relay_connection *conn) | |
9d1bbf21 | 2406 | { |
58eb9381 DG |
2407 | assert(relay_connections_ht); |
2408 | assert(conn); | |
2a174661 | 2409 | |
58eb9381 | 2410 | connection_delete(relay_connections_ht, conn); |
2a174661 | 2411 | |
58eb9381 | 2412 | /* For the control socket, we try to destroy the session. */ |
fd6d7293 | 2413 | if (conn->type == RELAY_CONTROL && conn->session) { |
58eb9381 | 2414 | destroy_session(conn->session, conn->sessions_ht); |
9d1bbf21 | 2415 | } |
5b6d8097 | 2416 | |
58eb9381 | 2417 | connection_destroy(conn); |
b8aa1682 JD |
2418 | } |
2419 | ||
2420 | /* | |
2421 | * This thread does the actual work | |
2422 | */ | |
2423 | static | |
2424 | void *relay_thread_worker(void *data) | |
2425 | { | |
beaad64c DG |
2426 | int ret, err = -1, last_seen_data_fd = -1; |
2427 | uint32_t nb_fd; | |
58eb9381 | 2428 | struct relay_connection *conn; |
b8aa1682 JD |
2429 | struct lttng_poll_event events; |
2430 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 2431 | struct lttng_ht_iter iter; |
b8aa1682 | 2432 | struct lttcomm_relayd_hdr recv_hdr; |
d3e2ba59 JD |
2433 | struct relay_local_data *relay_ctx = (struct relay_local_data *) data; |
2434 | struct lttng_ht *sessions_ht = relay_ctx->sessions_ht; | |
f233ab30 | 2435 | struct relay_index *index; |
b8aa1682 JD |
2436 | |
2437 | DBG("[thread] Relay worker started"); | |
2438 | ||
9d1bbf21 MD |
2439 | rcu_register_thread(); |
2440 | ||
55706a7d MD |
2441 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
2442 | ||
9b5e0863 MD |
2443 | if (testpoint(relayd_thread_worker)) { |
2444 | goto error_testpoint; | |
2445 | } | |
2446 | ||
f385ae0a MD |
2447 | health_code_update(); |
2448 | ||
b8aa1682 JD |
2449 | /* table of connections indexed on socket */ |
2450 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2451 | if (!relay_connections_ht) { |
2452 | goto relay_connections_ht_error; | |
2453 | } | |
b8aa1682 | 2454 | |
1c20f0e2 JD |
2455 | /* Tables of received indexes indexed by index handle and net_seq_num. */ |
2456 | indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64); | |
2457 | if (!indexes_ht) { | |
2458 | goto indexes_ht_error; | |
2459 | } | |
2460 | ||
b8aa1682 JD |
2461 | ret = create_thread_poll_set(&events, 2); |
2462 | if (ret < 0) { | |
2463 | goto error_poll_create; | |
2464 | } | |
2465 | ||
58eb9381 | 2466 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
2467 | if (ret < 0) { |
2468 | goto error; | |
2469 | } | |
2470 | ||
beaad64c | 2471 | restart: |
b8aa1682 | 2472 | while (1) { |
beaad64c DG |
2473 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2474 | ||
f385ae0a MD |
2475 | health_code_update(); |
2476 | ||
b8aa1682 | 2477 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2478 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 2479 | health_poll_entry(); |
b8aa1682 | 2480 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 2481 | health_poll_exit(); |
b8aa1682 JD |
2482 | if (ret < 0) { |
2483 | /* | |
2484 | * Restart interrupted system call. | |
2485 | */ | |
2486 | if (errno == EINTR) { | |
2487 | goto restart; | |
2488 | } | |
2489 | goto error; | |
2490 | } | |
2491 | ||
0d9c5d77 DG |
2492 | nb_fd = ret; |
2493 | ||
beaad64c DG |
2494 | /* |
2495 | * Process control. The control connection is prioritised so we don't | |
2496 | * starve it with high throughout put tracing data on the data | |
2497 | * connection. | |
2498 | */ | |
b8aa1682 JD |
2499 | for (i = 0; i < nb_fd; i++) { |
2500 | /* Fetch once the poll data */ | |
beaad64c DG |
2501 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2502 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 2503 | |
f385ae0a MD |
2504 | health_code_update(); |
2505 | ||
b8aa1682 JD |
2506 | /* Thread quit pipe has been closed. Killing thread. */ |
2507 | ret = check_thread_quit_pipe(pollfd, revents); | |
2508 | if (ret) { | |
095a4ae5 MD |
2509 | err = 0; |
2510 | goto exit; | |
b8aa1682 JD |
2511 | } |
2512 | ||
58eb9381 DG |
2513 | /* Inspect the relay conn pipe for new connection */ |
2514 | if (pollfd == relay_conn_pipe[0]) { | |
b8aa1682 | 2515 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
58eb9381 | 2516 | ERR("Relay connection pipe error"); |
b8aa1682 JD |
2517 | goto error; |
2518 | } else if (revents & LPOLLIN) { | |
58eb9381 | 2519 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
2520 | if (ret < 0) { |
2521 | goto error; | |
2522 | } | |
58eb9381 DG |
2523 | conn->sessions_ht = sessions_ht; |
2524 | connection_init(conn); | |
2525 | lttng_poll_add(&events, conn->sock->fd, | |
2526 | LPOLLIN | LPOLLRDHUP); | |
2527 | rcu_read_lock(); | |
2528 | lttng_ht_add_unique_ulong(relay_connections_ht, | |
2529 | &conn->sock_n); | |
9d1bbf21 | 2530 | rcu_read_unlock(); |
58eb9381 | 2531 | DBG("Connection socket %d added", conn->sock->fd); |
b8aa1682 | 2532 | } |
58eb9381 DG |
2533 | } else { |
2534 | rcu_read_lock(); | |
2535 | conn = connection_find_by_sock(relay_connections_ht, pollfd); | |
2536 | /* If not found, there is a synchronization issue. */ | |
2537 | assert(conn); | |
2538 | ||
2539 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2540 | cleanup_connection_pollfd(&events, pollfd); | |
2541 | destroy_connection(relay_connections_ht, conn); | |
beaad64c DG |
2542 | if (last_seen_data_fd == pollfd) { |
2543 | last_seen_data_fd = last_notdel_data_fd; | |
2544 | } | |
b8aa1682 | 2545 | } else if (revents & LPOLLIN) { |
58eb9381 DG |
2546 | if (conn->type == RELAY_CONTROL) { |
2547 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, | |
2548 | sizeof(recv_hdr), 0); | |
b8aa1682 | 2549 | if (ret <= 0) { |
58eb9381 DG |
2550 | /* Connection closed */ |
2551 | cleanup_connection_pollfd(&events, pollfd); | |
2552 | destroy_connection(relay_connections_ht, conn); | |
b8aa1682 JD |
2553 | DBG("Control connection closed with %d", pollfd); |
2554 | } else { | |
58eb9381 | 2555 | ret = relay_process_control(&recv_hdr, conn); |
b8aa1682 | 2556 | if (ret < 0) { |
beaad64c | 2557 | /* Clear the session on error. */ |
58eb9381 DG |
2558 | cleanup_connection_pollfd(&events, pollfd); |
2559 | destroy_connection(relay_connections_ht, conn); | |
b8aa1682 JD |
2560 | DBG("Connection closed with %d", pollfd); |
2561 | } | |
beaad64c | 2562 | seen_control = 1; |
b8aa1682 | 2563 | } |
beaad64c DG |
2564 | } else { |
2565 | /* | |
2566 | * Flag the last seen data fd not deleted. It will be | |
2567 | * used as the last seen fd if any fd gets deleted in | |
2568 | * this first loop. | |
2569 | */ | |
2570 | last_notdel_data_fd = pollfd; | |
2571 | } | |
58eb9381 DG |
2572 | } else { |
2573 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
beaad64c DG |
2574 | } |
2575 | rcu_read_unlock(); | |
2576 | } | |
2577 | } | |
2578 | ||
2579 | /* | |
2580 | * The last loop handled a control request, go back to poll to make | |
2581 | * sure we prioritise the control socket. | |
2582 | */ | |
2583 | if (seen_control) { | |
2584 | continue; | |
2585 | } | |
2586 | ||
2587 | if (last_seen_data_fd >= 0) { | |
2588 | for (i = 0; i < nb_fd; i++) { | |
2589 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
2590 | |
2591 | health_code_update(); | |
2592 | ||
beaad64c DG |
2593 | if (last_seen_data_fd == pollfd) { |
2594 | idx = i; | |
2595 | break; | |
2596 | } | |
2597 | } | |
2598 | } | |
2599 | ||
2600 | /* Process data connection. */ | |
2601 | for (i = idx + 1; i < nb_fd; i++) { | |
2602 | /* Fetch the poll data. */ | |
2603 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2604 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2605 | ||
f385ae0a MD |
2606 | health_code_update(); |
2607 | ||
beaad64c | 2608 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 2609 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
2610 | continue; |
2611 | } | |
2612 | ||
2613 | if (revents) { | |
2614 | rcu_read_lock(); | |
58eb9381 DG |
2615 | conn = connection_find_by_sock(relay_connections_ht, pollfd); |
2616 | if (!conn) { | |
beaad64c DG |
2617 | /* Skip it. Might be removed before. */ |
2618 | rcu_read_unlock(); | |
2619 | continue; | |
2620 | } | |
beaad64c DG |
2621 | |
2622 | if (revents & LPOLLIN) { | |
58eb9381 | 2623 | if (conn->type != RELAY_DATA) { |
b4caf944 | 2624 | rcu_read_unlock(); |
beaad64c DG |
2625 | continue; |
2626 | } | |
2627 | ||
58eb9381 DG |
2628 | ret = relay_process_data(conn); |
2629 | /* Connection closed */ | |
beaad64c | 2630 | if (ret < 0) { |
58eb9381 DG |
2631 | cleanup_connection_pollfd(&events, pollfd); |
2632 | destroy_connection(relay_connections_ht, conn); | |
beaad64c DG |
2633 | DBG("Data connection closed with %d", pollfd); |
2634 | /* | |
2635 | * Every goto restart call sets the last seen fd where | |
2636 | * here we don't really care since we gracefully | |
2637 | * continue the loop after the connection is deleted. | |
2638 | */ | |
2639 | } else { | |
2640 | /* Keep last seen port. */ | |
2641 | last_seen_data_fd = pollfd; | |
2642 | rcu_read_unlock(); | |
2643 | goto restart; | |
b8aa1682 JD |
2644 | } |
2645 | } | |
9d1bbf21 | 2646 | rcu_read_unlock(); |
b8aa1682 JD |
2647 | } |
2648 | } | |
beaad64c | 2649 | last_seen_data_fd = -1; |
b8aa1682 JD |
2650 | } |
2651 | ||
f385ae0a MD |
2652 | /* Normal exit, no error */ |
2653 | ret = 0; | |
2654 | ||
095a4ae5 | 2655 | exit: |
b8aa1682 JD |
2656 | error: |
2657 | lttng_poll_clean(&events); | |
2658 | ||
58eb9381 | 2659 | /* Cleanup reamaining connection object. */ |
9d1bbf21 | 2660 | rcu_read_lock(); |
58eb9381 DG |
2661 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, conn, |
2662 | sock_n.node) { | |
f385ae0a | 2663 | health_code_update(); |
58eb9381 | 2664 | destroy_connection(relay_connections_ht, conn); |
b8aa1682 | 2665 | } |
94d49140 | 2666 | rcu_read_unlock(); |
7d2f7452 | 2667 | error_poll_create: |
f233ab30 JD |
2668 | rcu_read_lock(); |
2669 | cds_lfht_for_each_entry(indexes_ht->ht, &iter.iter, index, | |
2670 | index_n.node) { | |
2671 | health_code_update(); | |
2672 | relay_index_delete(index); | |
2673 | relay_index_free_safe(index); | |
2674 | } | |
2675 | rcu_read_unlock(); | |
7d2f7452 | 2676 | lttng_ht_destroy(indexes_ht); |
1c20f0e2 | 2677 | indexes_ht_error: |
b8aa1682 | 2678 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 2679 | relay_connections_ht_error: |
58eb9381 DG |
2680 | /* Close relay conn pipes */ |
2681 | utils_close_pipe(relay_conn_pipe); | |
095a4ae5 MD |
2682 | if (err) { |
2683 | DBG("Thread exited with error"); | |
2684 | } | |
b8aa1682 | 2685 | DBG("Worker thread cleanup complete"); |
095a4ae5 | 2686 | free(data_buffer); |
9b5e0863 | 2687 | error_testpoint: |
f385ae0a MD |
2688 | if (err) { |
2689 | health_error(); | |
2690 | ERR("Health error occurred in %s", __func__); | |
2691 | } | |
2692 | health_unregister(health_relayd); | |
9d1bbf21 | 2693 | rcu_unregister_thread(); |
f385ae0a | 2694 | stop_threads(); |
b8aa1682 JD |
2695 | return NULL; |
2696 | } | |
2697 | ||
2698 | /* | |
2699 | * Create the relay command pipe to wake thread_manage_apps. | |
2700 | * Closed in cleanup(). | |
2701 | */ | |
58eb9381 | 2702 | static int create_relay_conn_pipe(void) |
b8aa1682 | 2703 | { |
a02de639 | 2704 | int ret; |
b8aa1682 | 2705 | |
58eb9381 | 2706 | ret = utils_create_pipe_cloexec(relay_conn_pipe); |
b8aa1682 | 2707 | |
b8aa1682 JD |
2708 | return ret; |
2709 | } | |
2710 | ||
2711 | /* | |
2712 | * main | |
2713 | */ | |
2714 | int main(int argc, char **argv) | |
2715 | { | |
2716 | int ret = 0; | |
2717 | void *status; | |
d3e2ba59 | 2718 | struct relay_local_data *relay_ctx; |
b8aa1682 | 2719 | |
b8aa1682 JD |
2720 | /* Parse arguments */ |
2721 | progname = argv[0]; | |
cd60b05a | 2722 | if ((ret = set_options(argc, argv)) < 0) { |
a02de639 | 2723 | goto exit; |
b8aa1682 JD |
2724 | } |
2725 | ||
2726 | if ((ret = set_signal_handler()) < 0) { | |
2727 | goto exit; | |
2728 | } | |
2729 | ||
4d513a50 DG |
2730 | /* Try to create directory if -o, --output is specified. */ |
2731 | if (opt_output_path) { | |
994fa64f DG |
2732 | if (*opt_output_path != '/') { |
2733 | ERR("Please specify an absolute path for -o, --output PATH"); | |
2734 | goto exit; | |
2735 | } | |
2736 | ||
4d513a50 DG |
2737 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG); |
2738 | if (ret < 0) { | |
2739 | ERR("Unable to create %s", opt_output_path); | |
2740 | goto exit; | |
2741 | } | |
2742 | } | |
2743 | ||
b8aa1682 | 2744 | /* Daemonize */ |
b5218ffb | 2745 | if (opt_daemon || opt_background) { |
3fd27398 MD |
2746 | int i; |
2747 | ||
2748 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, | |
2749 | !opt_background); | |
b8aa1682 | 2750 | if (ret < 0) { |
a02de639 | 2751 | goto exit; |
b8aa1682 | 2752 | } |
3fd27398 MD |
2753 | |
2754 | /* | |
2755 | * We are in the child. Make sure all other file | |
2756 | * descriptors are closed, in case we are called with | |
2757 | * more opened file descriptors than the standard ones. | |
2758 | */ | |
2759 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
2760 | (void) close(i); | |
2761 | } | |
2762 | } | |
2763 | ||
2764 | /* Create thread quit pipe */ | |
2765 | if ((ret = init_thread_quit_pipe()) < 0) { | |
2766 | goto error; | |
b8aa1682 JD |
2767 | } |
2768 | ||
1c20f0e2 JD |
2769 | /* We need those values for the file/dir creation. */ |
2770 | relayd_uid = getuid(); | |
2771 | relayd_gid = getgid(); | |
b8aa1682 | 2772 | |
1c20f0e2 JD |
2773 | /* Check if daemon is UID = 0 */ |
2774 | if (relayd_uid == 0) { | |
8d5c808e | 2775 | if (control_uri->port < 1024 || data_uri->port < 1024 || live_uri->port < 1024) { |
b8aa1682 JD |
2776 | ERR("Need to be root to use ports < 1024"); |
2777 | ret = -1; | |
a02de639 | 2778 | goto exit; |
b8aa1682 JD |
2779 | } |
2780 | } | |
2781 | ||
2782 | /* Setup the thread apps communication pipe. */ | |
58eb9381 | 2783 | if ((ret = create_relay_conn_pipe()) < 0) { |
b8aa1682 JD |
2784 | goto exit; |
2785 | } | |
2786 | ||
2787 | /* Init relay command queue. */ | |
8bdee6e2 | 2788 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 JD |
2789 | |
2790 | /* Set up max poll set size */ | |
2791 | lttng_poll_set_max_size(); | |
2792 | ||
554831e7 MD |
2793 | /* Initialize communication library */ |
2794 | lttcomm_init(); | |
87e45c13 | 2795 | lttcomm_inet_init(); |
554831e7 | 2796 | |
d3e2ba59 JD |
2797 | relay_ctx = zmalloc(sizeof(struct relay_local_data)); |
2798 | if (!relay_ctx) { | |
2799 | PERROR("relay_ctx"); | |
2800 | goto exit; | |
2801 | } | |
2802 | ||
2803 | /* tables of sessions indexed by session ID */ | |
2a174661 | 2804 | relay_ctx->sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 JD |
2805 | if (!relay_ctx->sessions_ht) { |
2806 | goto exit_relay_ctx_sessions; | |
2807 | } | |
2808 | ||
2809 | /* tables of streams indexed by stream ID */ | |
2a174661 | 2810 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 JD |
2811 | if (!relay_streams_ht) { |
2812 | goto exit_relay_ctx_streams; | |
2813 | } | |
2814 | ||
2815 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
2816 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2817 | if (!viewer_streams_ht) { | |
d3e2ba59 JD |
2818 | goto exit_relay_ctx_viewer_streams; |
2819 | } | |
2820 | ||
55706a7d MD |
2821 | /* Initialize thread health monitoring */ |
2822 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
2823 | if (!health_relayd) { | |
2824 | PERROR("health_app_create error"); | |
2825 | goto exit_health_app_create; | |
2826 | } | |
2827 | ||
65931c8b MD |
2828 | ret = utils_create_pipe(health_quit_pipe); |
2829 | if (ret < 0) { | |
2830 | goto error_health_pipe; | |
2831 | } | |
2832 | ||
2833 | /* Create thread to manage the client socket */ | |
2834 | ret = pthread_create(&health_thread, NULL, | |
2835 | thread_manage_health, (void *) NULL); | |
2836 | if (ret != 0) { | |
2837 | PERROR("pthread_create health"); | |
2838 | goto health_error; | |
2839 | } | |
2840 | ||
b8aa1682 JD |
2841 | /* Setup the dispatcher thread */ |
2842 | ret = pthread_create(&dispatcher_thread, NULL, | |
2843 | relay_thread_dispatcher, (void *) NULL); | |
2844 | if (ret != 0) { | |
2845 | PERROR("pthread_create dispatcher"); | |
2846 | goto exit_dispatcher; | |
2847 | } | |
2848 | ||
2849 | /* Setup the worker thread */ | |
2850 | ret = pthread_create(&worker_thread, NULL, | |
d3e2ba59 | 2851 | relay_thread_worker, (void *) relay_ctx); |
b8aa1682 JD |
2852 | if (ret != 0) { |
2853 | PERROR("pthread_create worker"); | |
2854 | goto exit_worker; | |
2855 | } | |
2856 | ||
2857 | /* Setup the listener thread */ | |
2858 | ret = pthread_create(&listener_thread, NULL, | |
2859 | relay_thread_listener, (void *) NULL); | |
2860 | if (ret != 0) { | |
2861 | PERROR("pthread_create listener"); | |
2862 | goto exit_listener; | |
2863 | } | |
2864 | ||
0b242f62 | 2865 | ret = live_start_threads(live_uri, relay_ctx); |
d3e2ba59 JD |
2866 | if (ret != 0) { |
2867 | ERR("Starting live viewer threads"); | |
50138f51 | 2868 | goto exit_live; |
d3e2ba59 JD |
2869 | } |
2870 | ||
50138f51 | 2871 | exit_live: |
b8aa1682 JD |
2872 | ret = pthread_join(listener_thread, &status); |
2873 | if (ret != 0) { | |
2874 | PERROR("pthread_join"); | |
2875 | goto error; /* join error, exit without cleanup */ | |
2876 | } | |
2877 | ||
50138f51 | 2878 | exit_listener: |
b8aa1682 JD |
2879 | ret = pthread_join(worker_thread, &status); |
2880 | if (ret != 0) { | |
2881 | PERROR("pthread_join"); | |
2882 | goto error; /* join error, exit without cleanup */ | |
2883 | } | |
2884 | ||
50138f51 | 2885 | exit_worker: |
b8aa1682 JD |
2886 | ret = pthread_join(dispatcher_thread, &status); |
2887 | if (ret != 0) { | |
2888 | PERROR("pthread_join"); | |
2889 | goto error; /* join error, exit without cleanup */ | |
2890 | } | |
42415026 | 2891 | |
50138f51 | 2892 | exit_dispatcher: |
65931c8b MD |
2893 | ret = pthread_join(health_thread, &status); |
2894 | if (ret != 0) { | |
2895 | PERROR("pthread_join health thread"); | |
2896 | goto error; /* join error, exit without cleanup */ | |
2897 | } | |
2898 | ||
bd11e201 MD |
2899 | /* |
2900 | * Stop live threads only after joining other threads. | |
2901 | */ | |
2902 | live_stop_threads(); | |
2903 | ||
65931c8b MD |
2904 | health_error: |
2905 | utils_close_pipe(health_quit_pipe); | |
2906 | ||
2907 | error_health_pipe: | |
55706a7d MD |
2908 | health_app_destroy(health_relayd); |
2909 | ||
2910 | exit_health_app_create: | |
92c6ca54 | 2911 | lttng_ht_destroy(viewer_streams_ht); |
d3e2ba59 JD |
2912 | |
2913 | exit_relay_ctx_viewer_streams: | |
2914 | lttng_ht_destroy(relay_streams_ht); | |
2915 | ||
2916 | exit_relay_ctx_streams: | |
2917 | lttng_ht_destroy(relay_ctx->sessions_ht); | |
2918 | ||
2919 | exit_relay_ctx_sessions: | |
2920 | free(relay_ctx); | |
b8aa1682 JD |
2921 | |
2922 | exit: | |
2923 | cleanup(); | |
2924 | if (!ret) { | |
2925 | exit(EXIT_SUCCESS); | |
2926 | } | |
a02de639 | 2927 | |
b8aa1682 JD |
2928 | error: |
2929 | exit(EXIT_FAILURE); | |
2930 | } |