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> |
7591bab1 | 5 | * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
b8aa1682 JD |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License, version 2 only, | |
9 | * as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | */ | |
20 | ||
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> | |
b8aa1682 JD |
42 | |
43 | #include <lttng/lttng.h> | |
44 | #include <common/common.h> | |
45 | #include <common/compat/poll.h> | |
46 | #include <common/compat/socket.h> | |
f263b7fd | 47 | #include <common/compat/endian.h> |
e8fa9fb0 | 48 | #include <common/compat/getenv.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> |
f40ef1d5 | 57 | #include <common/config/session-config.h> |
7591bab1 | 58 | #include <urcu/rculist.h> |
b8aa1682 | 59 | |
0f907de1 | 60 | #include "cmd.h" |
d3e2ba59 | 61 | #include "ctf-trace.h" |
1c20f0e2 | 62 | #include "index.h" |
0f907de1 | 63 | #include "utils.h" |
b8aa1682 | 64 | #include "lttng-relayd.h" |
d3e2ba59 | 65 | #include "live.h" |
55706a7d | 66 | #include "health-relayd.h" |
9b5e0863 | 67 | #include "testpoint.h" |
2f8f53af | 68 | #include "viewer-stream.h" |
2a174661 DG |
69 | #include "session.h" |
70 | #include "stream.h" | |
58eb9381 | 71 | #include "connection.h" |
a44ca2ca | 72 | #include "tracefile-array.h" |
f056029c | 73 | #include "tcp_keep_alive.h" |
b8aa1682 | 74 | |
4fc83d94 PP |
75 | static const char *help_msg = |
76 | #ifdef LTTNG_EMBED_HELP | |
77 | #include <lttng-relayd.8.h> | |
78 | #else | |
79 | NULL | |
80 | #endif | |
81 | ; | |
82 | ||
b8aa1682 | 83 | /* command line options */ |
0f907de1 | 84 | char *opt_output_path; |
b5218ffb | 85 | static int opt_daemon, opt_background; |
3fd27398 MD |
86 | |
87 | /* | |
88 | * We need to wait for listener and live listener threads, as well as | |
89 | * health check thread, before being ready to signal readiness. | |
90 | */ | |
91 | #define NR_LTTNG_RELAY_READY 3 | |
92 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
0848dba7 MD |
93 | |
94 | /* Size of receive buffer. */ | |
95 | #define RECV_DATA_BUFFER_SIZE 65536 | |
96 | ||
3fd27398 MD |
97 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ |
98 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
99 | ||
095a4ae5 MD |
100 | static struct lttng_uri *control_uri; |
101 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 102 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
103 | |
104 | const char *progname; | |
b8aa1682 | 105 | |
65931c8b | 106 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
107 | static int tracing_group_name_override; |
108 | ||
109 | const char * const config_section_name = "relayd"; | |
65931c8b | 110 | |
b8aa1682 JD |
111 | /* |
112 | * Quit pipe for all threads. This permits a single cancellation point | |
113 | * for all threads when receiving an event on the pipe. | |
114 | */ | |
0b242f62 | 115 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
116 | |
117 | /* | |
118 | * This pipe is used to inform the worker thread that a command is queued and | |
119 | * ready to be processed. | |
120 | */ | |
58eb9381 | 121 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 122 | |
26c9d55e | 123 | /* Shared between threads */ |
b8aa1682 JD |
124 | static int dispatch_thread_exit; |
125 | ||
126 | static pthread_t listener_thread; | |
127 | static pthread_t dispatcher_thread; | |
128 | static pthread_t worker_thread; | |
65931c8b | 129 | static pthread_t health_thread; |
b8aa1682 | 130 | |
7591bab1 MD |
131 | /* |
132 | * last_relay_stream_id_lock protects last_relay_stream_id increment | |
133 | * atomicity on 32-bit architectures. | |
134 | */ | |
135 | static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER; | |
095a4ae5 | 136 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
137 | |
138 | /* | |
139 | * Relay command queue. | |
140 | * | |
141 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
142 | * queue. | |
143 | */ | |
58eb9381 | 144 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 JD |
145 | |
146 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
147 | static char *data_buffer; |
148 | static unsigned int data_buffer_size; | |
b8aa1682 | 149 | |
d3e2ba59 JD |
150 | /* Global relay stream hash table. */ |
151 | struct lttng_ht *relay_streams_ht; | |
152 | ||
92c6ca54 DG |
153 | /* Global relay viewer stream hash table. */ |
154 | struct lttng_ht *viewer_streams_ht; | |
155 | ||
7591bab1 MD |
156 | /* Global relay sessions hash table. */ |
157 | struct lttng_ht *sessions_ht; | |
0a6518b0 | 158 | |
55706a7d | 159 | /* Relayd health monitoring */ |
eea7556c | 160 | struct health_app *health_relayd; |
55706a7d | 161 | |
cd60b05a JG |
162 | static struct option long_options[] = { |
163 | { "control-port", 1, 0, 'C', }, | |
164 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 165 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 166 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 167 | { "background", 0, 0, 'b', }, |
cd60b05a JG |
168 | { "group", 1, 0, 'g', }, |
169 | { "help", 0, 0, 'h', }, | |
170 | { "output", 1, 0, 'o', }, | |
171 | { "verbose", 0, 0, 'v', }, | |
172 | { "config", 1, 0, 'f' }, | |
3a904098 | 173 | { "version", 0, 0, 'V' }, |
cd60b05a JG |
174 | { NULL, 0, 0, 0, }, |
175 | }; | |
176 | ||
3a904098 | 177 | static const char *config_ignore_options[] = { "help", "config", "version" }; |
cd60b05a | 178 | |
cd60b05a JG |
179 | /* |
180 | * Take an option from the getopt output and set it in the right variable to be | |
181 | * used later. | |
182 | * | |
183 | * Return 0 on success else a negative value. | |
184 | */ | |
7591bab1 | 185 | static int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 186 | { |
cd60b05a JG |
187 | int ret; |
188 | ||
189 | switch (opt) { | |
190 | case 0: | |
191 | fprintf(stderr, "option %s", optname); | |
192 | if (arg) { | |
193 | fprintf(stderr, " with arg %s\n", arg); | |
194 | } | |
195 | break; | |
196 | case 'C': | |
e8fa9fb0 MD |
197 | if (lttng_is_setuid_setgid()) { |
198 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
199 | "-C, --control-port"); | |
200 | } else { | |
201 | ret = uri_parse(arg, &control_uri); | |
202 | if (ret < 0) { | |
203 | ERR("Invalid control URI specified"); | |
204 | goto end; | |
205 | } | |
206 | if (control_uri->port == 0) { | |
207 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
208 | } | |
cd60b05a JG |
209 | } |
210 | break; | |
211 | case 'D': | |
e8fa9fb0 MD |
212 | if (lttng_is_setuid_setgid()) { |
213 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
214 | "-D, -data-port"); | |
215 | } else { | |
216 | ret = uri_parse(arg, &data_uri); | |
217 | if (ret < 0) { | |
218 | ERR("Invalid data URI specified"); | |
219 | goto end; | |
220 | } | |
221 | if (data_uri->port == 0) { | |
222 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
223 | } | |
cd60b05a JG |
224 | } |
225 | break; | |
8d5c808e | 226 | case 'L': |
e8fa9fb0 MD |
227 | if (lttng_is_setuid_setgid()) { |
228 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
229 | "-L, -live-port"); | |
230 | } else { | |
231 | ret = uri_parse(arg, &live_uri); | |
232 | if (ret < 0) { | |
233 | ERR("Invalid live URI specified"); | |
234 | goto end; | |
235 | } | |
236 | if (live_uri->port == 0) { | |
237 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
238 | } | |
8d5c808e AM |
239 | } |
240 | break; | |
cd60b05a JG |
241 | case 'd': |
242 | opt_daemon = 1; | |
243 | break; | |
b5218ffb MD |
244 | case 'b': |
245 | opt_background = 1; | |
246 | break; | |
cd60b05a | 247 | case 'g': |
e8fa9fb0 MD |
248 | if (lttng_is_setuid_setgid()) { |
249 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
250 | "-g, --group"); | |
251 | } else { | |
252 | tracing_group_name = strdup(arg); | |
253 | if (tracing_group_name == NULL) { | |
254 | ret = -errno; | |
255 | PERROR("strdup"); | |
256 | goto end; | |
257 | } | |
258 | tracing_group_name_override = 1; | |
330a40bb | 259 | } |
cd60b05a JG |
260 | break; |
261 | case 'h': | |
4fc83d94 | 262 | ret = utils_show_help(8, "lttng-relayd", help_msg); |
655b5cc1 | 263 | if (ret) { |
4fc83d94 | 264 | ERR("Cannot show --help for `lttng-relayd`"); |
655b5cc1 PP |
265 | perror("exec"); |
266 | } | |
cd60b05a | 267 | exit(EXIT_FAILURE); |
3a904098 AW |
268 | case 'V': |
269 | fprintf(stdout, "%s\n", VERSION); | |
270 | exit(EXIT_SUCCESS); | |
cd60b05a | 271 | case 'o': |
e8fa9fb0 MD |
272 | if (lttng_is_setuid_setgid()) { |
273 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
274 | "-o, --output"); | |
275 | } else { | |
276 | ret = asprintf(&opt_output_path, "%s", arg); | |
277 | if (ret < 0) { | |
278 | ret = -errno; | |
279 | PERROR("asprintf opt_output_path"); | |
280 | goto end; | |
281 | } | |
cd60b05a JG |
282 | } |
283 | break; | |
284 | case 'v': | |
285 | /* Verbose level can increase using multiple -v */ | |
286 | if (arg) { | |
287 | lttng_opt_verbose = config_parse_value(arg); | |
288 | } else { | |
849e5b7b DG |
289 | /* Only 3 level of verbosity (-vvv). */ |
290 | if (lttng_opt_verbose < 3) { | |
291 | lttng_opt_verbose += 1; | |
292 | } | |
cd60b05a JG |
293 | } |
294 | break; | |
295 | default: | |
296 | /* Unknown option or other error. | |
297 | * Error is printed by getopt, just return */ | |
298 | ret = -1; | |
299 | goto end; | |
300 | } | |
301 | ||
302 | /* All good. */ | |
303 | ret = 0; | |
304 | ||
305 | end: | |
306 | return ret; | |
307 | } | |
308 | ||
309 | /* | |
310 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 311 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
cd60b05a JG |
312 | * return value conventions. |
313 | */ | |
7591bab1 | 314 | static int config_entry_handler(const struct config_entry *entry, void *unused) |
cd60b05a JG |
315 | { |
316 | int ret = 0, i; | |
317 | ||
318 | if (!entry || !entry->name || !entry->value) { | |
319 | ret = -EINVAL; | |
320 | goto end; | |
321 | } | |
322 | ||
323 | /* Check if the option is to be ignored */ | |
324 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
325 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
326 | goto end; | |
327 | } | |
328 | } | |
329 | ||
330 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
331 | /* Ignore if entry name is not fully matched. */ | |
332 | if (strcmp(entry->name, long_options[i].name)) { | |
333 | continue; | |
334 | } | |
335 | ||
336 | /* | |
7591bab1 MD |
337 | * If the option takes no argument on the command line, |
338 | * we have to check if the value is "true". We support | |
339 | * non-zero numeric values, true, on and yes. | |
cd60b05a JG |
340 | */ |
341 | if (!long_options[i].has_arg) { | |
342 | ret = config_parse_value(entry->value); | |
343 | if (ret <= 0) { | |
344 | if (ret) { | |
345 | WARN("Invalid configuration value \"%s\" for option %s", | |
346 | entry->value, entry->name); | |
347 | } | |
348 | /* False, skip boolean config option. */ | |
349 | goto end; | |
350 | } | |
351 | } | |
352 | ||
353 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
354 | goto end; | |
355 | } | |
356 | ||
357 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
358 | entry->name); | |
359 | ||
360 | end: | |
361 | return ret; | |
362 | } | |
363 | ||
7591bab1 | 364 | static int set_options(int argc, char **argv) |
cd60b05a | 365 | { |
178a0557 | 366 | int c, ret = 0, option_index = 0, retval = 0; |
cd60b05a JG |
367 | int orig_optopt = optopt, orig_optind = optind; |
368 | char *default_address, *optstring; | |
369 | const char *config_path = NULL; | |
370 | ||
371 | optstring = utils_generate_optstring(long_options, | |
372 | sizeof(long_options) / sizeof(struct option)); | |
373 | if (!optstring) { | |
178a0557 | 374 | retval = -ENOMEM; |
cd60b05a JG |
375 | goto exit; |
376 | } | |
377 | ||
378 | /* Check for the --config option */ | |
379 | ||
380 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
381 | &option_index)) != -1) { | |
382 | if (c == '?') { | |
178a0557 | 383 | retval = -EINVAL; |
cd60b05a JG |
384 | goto exit; |
385 | } else if (c != 'f') { | |
386 | continue; | |
387 | } | |
388 | ||
e8fa9fb0 MD |
389 | if (lttng_is_setuid_setgid()) { |
390 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
391 | "-f, --config"); | |
392 | } else { | |
393 | config_path = utils_expand_path(optarg); | |
394 | if (!config_path) { | |
395 | ERR("Failed to resolve path: %s", optarg); | |
396 | } | |
cd60b05a JG |
397 | } |
398 | } | |
399 | ||
400 | ret = config_get_section_entries(config_path, config_section_name, | |
401 | config_entry_handler, NULL); | |
402 | if (ret) { | |
403 | if (ret > 0) { | |
404 | ERR("Invalid configuration option at line %i", ret); | |
cd60b05a | 405 | } |
178a0557 | 406 | retval = -1; |
cd60b05a JG |
407 | goto exit; |
408 | } | |
b8aa1682 | 409 | |
cd60b05a JG |
410 | /* Reset getopt's global state */ |
411 | optopt = orig_optopt; | |
412 | optind = orig_optind; | |
b8aa1682 | 413 | while (1) { |
cd60b05a | 414 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
415 | if (c == -1) { |
416 | break; | |
417 | } | |
418 | ||
cd60b05a JG |
419 | ret = set_option(c, optarg, long_options[option_index].name); |
420 | if (ret < 0) { | |
178a0557 | 421 | retval = -1; |
b8aa1682 JD |
422 | goto exit; |
423 | } | |
424 | } | |
425 | ||
426 | /* assign default values */ | |
427 | if (control_uri == NULL) { | |
fa91dc52 MD |
428 | ret = asprintf(&default_address, |
429 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
430 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
431 | if (ret < 0) { |
432 | PERROR("asprintf default data address"); | |
178a0557 | 433 | retval = -1; |
b8aa1682 JD |
434 | goto exit; |
435 | } | |
436 | ||
437 | ret = uri_parse(default_address, &control_uri); | |
438 | free(default_address); | |
439 | if (ret < 0) { | |
440 | ERR("Invalid control URI specified"); | |
178a0557 | 441 | retval = -1; |
b8aa1682 JD |
442 | goto exit; |
443 | } | |
444 | } | |
445 | if (data_uri == NULL) { | |
fa91dc52 MD |
446 | ret = asprintf(&default_address, |
447 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
448 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
449 | if (ret < 0) { |
450 | PERROR("asprintf default data address"); | |
178a0557 | 451 | retval = -1; |
b8aa1682 JD |
452 | goto exit; |
453 | } | |
454 | ||
455 | ret = uri_parse(default_address, &data_uri); | |
456 | free(default_address); | |
457 | if (ret < 0) { | |
458 | ERR("Invalid data URI specified"); | |
178a0557 | 459 | retval = -1; |
b8aa1682 JD |
460 | goto exit; |
461 | } | |
462 | } | |
d3e2ba59 | 463 | if (live_uri == NULL) { |
fa91dc52 MD |
464 | ret = asprintf(&default_address, |
465 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
466 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
467 | if (ret < 0) { |
468 | PERROR("asprintf default viewer control address"); | |
178a0557 | 469 | retval = -1; |
d3e2ba59 JD |
470 | goto exit; |
471 | } | |
472 | ||
473 | ret = uri_parse(default_address, &live_uri); | |
474 | free(default_address); | |
475 | if (ret < 0) { | |
476 | ERR("Invalid viewer control URI specified"); | |
178a0557 | 477 | retval = -1; |
d3e2ba59 JD |
478 | goto exit; |
479 | } | |
480 | } | |
b8aa1682 JD |
481 | |
482 | exit: | |
cd60b05a | 483 | free(optstring); |
178a0557 | 484 | return retval; |
b8aa1682 JD |
485 | } |
486 | ||
7591bab1 MD |
487 | static void print_global_objects(void) |
488 | { | |
489 | rcu_register_thread(); | |
490 | ||
491 | print_viewer_streams(); | |
492 | print_relay_streams(); | |
493 | print_sessions(); | |
494 | ||
495 | rcu_unregister_thread(); | |
496 | } | |
497 | ||
b8aa1682 JD |
498 | /* |
499 | * Cleanup the daemon | |
500 | */ | |
7591bab1 | 501 | static void relayd_cleanup(void) |
b8aa1682 | 502 | { |
7591bab1 MD |
503 | print_global_objects(); |
504 | ||
b8aa1682 JD |
505 | DBG("Cleaning up"); |
506 | ||
178a0557 MD |
507 | if (viewer_streams_ht) |
508 | lttng_ht_destroy(viewer_streams_ht); | |
509 | if (relay_streams_ht) | |
510 | lttng_ht_destroy(relay_streams_ht); | |
7591bab1 MD |
511 | if (sessions_ht) |
512 | lttng_ht_destroy(sessions_ht); | |
178a0557 | 513 | |
095a4ae5 MD |
514 | /* free the dynamically allocated opt_output_path */ |
515 | free(opt_output_path); | |
516 | ||
a02de639 CB |
517 | /* Close thread quit pipes */ |
518 | utils_close_pipe(thread_quit_pipe); | |
519 | ||
710c1f73 DG |
520 | uri_free(control_uri); |
521 | uri_free(data_uri); | |
8d5c808e | 522 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
523 | |
524 | if (tracing_group_name_override) { | |
525 | free((void *) tracing_group_name); | |
526 | } | |
b8aa1682 JD |
527 | } |
528 | ||
529 | /* | |
530 | * Write to writable pipe used to notify a thread. | |
531 | */ | |
7591bab1 | 532 | static int notify_thread_pipe(int wpipe) |
b8aa1682 | 533 | { |
6cd525e8 | 534 | ssize_t ret; |
b8aa1682 | 535 | |
6cd525e8 MD |
536 | ret = lttng_write(wpipe, "!", 1); |
537 | if (ret < 1) { | |
b8aa1682 | 538 | PERROR("write poll pipe"); |
b4aacfdc | 539 | goto end; |
b8aa1682 | 540 | } |
b4aacfdc MD |
541 | ret = 0; |
542 | end: | |
b8aa1682 JD |
543 | return ret; |
544 | } | |
545 | ||
7591bab1 | 546 | static int notify_health_quit_pipe(int *pipe) |
65931c8b | 547 | { |
6cd525e8 | 548 | ssize_t ret; |
65931c8b | 549 | |
6cd525e8 MD |
550 | ret = lttng_write(pipe[1], "4", 1); |
551 | if (ret < 1) { | |
65931c8b | 552 | PERROR("write relay health quit"); |
b4aacfdc | 553 | goto end; |
65931c8b | 554 | } |
b4aacfdc MD |
555 | ret = 0; |
556 | end: | |
557 | return ret; | |
65931c8b MD |
558 | } |
559 | ||
b8aa1682 | 560 | /* |
b4aacfdc | 561 | * Stop all relayd and relayd-live threads. |
b8aa1682 | 562 | */ |
b4aacfdc | 563 | int lttng_relay_stop_threads(void) |
b8aa1682 | 564 | { |
b4aacfdc | 565 | int retval = 0; |
b8aa1682 JD |
566 | |
567 | /* Stopping all threads */ | |
568 | DBG("Terminating all threads"); | |
b4aacfdc | 569 | if (notify_thread_pipe(thread_quit_pipe[1])) { |
b8aa1682 | 570 | ERR("write error on thread quit pipe"); |
b4aacfdc | 571 | retval = -1; |
b8aa1682 JD |
572 | } |
573 | ||
b4aacfdc MD |
574 | if (notify_health_quit_pipe(health_quit_pipe)) { |
575 | ERR("write error on health quit pipe"); | |
576 | } | |
65931c8b | 577 | |
b8aa1682 | 578 | /* Dispatch thread */ |
26c9d55e | 579 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 580 | futex_nto1_wake(&relay_conn_queue.futex); |
178a0557 | 581 | |
b4aacfdc | 582 | if (relayd_live_stop()) { |
178a0557 | 583 | ERR("Error stopping live threads"); |
b4aacfdc | 584 | retval = -1; |
178a0557 | 585 | } |
b4aacfdc | 586 | return retval; |
b8aa1682 JD |
587 | } |
588 | ||
589 | /* | |
590 | * Signal handler for the daemon | |
591 | * | |
592 | * Simply stop all worker threads, leaving main() return gracefully after | |
593 | * joining all threads and calling cleanup(). | |
594 | */ | |
7591bab1 | 595 | static void sighandler(int sig) |
b8aa1682 JD |
596 | { |
597 | switch (sig) { | |
b8aa1682 JD |
598 | case SIGINT: |
599 | DBG("SIGINT caught"); | |
b4aacfdc MD |
600 | if (lttng_relay_stop_threads()) { |
601 | ERR("Error stopping threads"); | |
602 | } | |
b8aa1682 JD |
603 | break; |
604 | case SIGTERM: | |
605 | DBG("SIGTERM caught"); | |
b4aacfdc MD |
606 | if (lttng_relay_stop_threads()) { |
607 | ERR("Error stopping threads"); | |
608 | } | |
b8aa1682 | 609 | break; |
3fd27398 MD |
610 | case SIGUSR1: |
611 | CMM_STORE_SHARED(recv_child_signal, 1); | |
612 | break; | |
b8aa1682 JD |
613 | default: |
614 | break; | |
615 | } | |
616 | } | |
617 | ||
618 | /* | |
619 | * Setup signal handler for : | |
620 | * SIGINT, SIGTERM, SIGPIPE | |
621 | */ | |
7591bab1 | 622 | static int set_signal_handler(void) |
b8aa1682 JD |
623 | { |
624 | int ret = 0; | |
625 | struct sigaction sa; | |
626 | sigset_t sigset; | |
627 | ||
628 | if ((ret = sigemptyset(&sigset)) < 0) { | |
629 | PERROR("sigemptyset"); | |
630 | return ret; | |
631 | } | |
632 | ||
b8aa1682 JD |
633 | sa.sa_mask = sigset; |
634 | sa.sa_flags = 0; | |
0072e5e2 MD |
635 | |
636 | sa.sa_handler = sighandler; | |
b8aa1682 JD |
637 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
638 | PERROR("sigaction"); | |
639 | return ret; | |
640 | } | |
641 | ||
642 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
643 | PERROR("sigaction"); | |
644 | return ret; | |
645 | } | |
646 | ||
0072e5e2 | 647 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
b8aa1682 JD |
648 | PERROR("sigaction"); |
649 | return ret; | |
650 | } | |
651 | ||
0072e5e2 MD |
652 | sa.sa_handler = SIG_IGN; |
653 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
3fd27398 MD |
654 | PERROR("sigaction"); |
655 | return ret; | |
656 | } | |
657 | ||
658 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
659 | |
660 | return ret; | |
661 | } | |
662 | ||
3fd27398 MD |
663 | void lttng_relay_notify_ready(void) |
664 | { | |
665 | /* Notify the parent of the fork() process that we are ready. */ | |
666 | if (opt_daemon || opt_background) { | |
667 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
668 | kill(child_ppid, SIGUSR1); | |
669 | } | |
670 | } | |
671 | } | |
672 | ||
b8aa1682 JD |
673 | /* |
674 | * Init thread quit pipe. | |
675 | * | |
676 | * Return -1 on error or 0 if all pipes are created. | |
677 | */ | |
7591bab1 | 678 | static int init_thread_quit_pipe(void) |
b8aa1682 | 679 | { |
a02de639 | 680 | int ret; |
b8aa1682 | 681 | |
a02de639 | 682 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 683 | |
b8aa1682 JD |
684 | return ret; |
685 | } | |
686 | ||
687 | /* | |
688 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
689 | */ | |
7591bab1 | 690 | static int create_thread_poll_set(struct lttng_poll_event *events, int size) |
b8aa1682 JD |
691 | { |
692 | int ret; | |
693 | ||
694 | if (events == NULL || size == 0) { | |
695 | ret = -1; | |
696 | goto error; | |
697 | } | |
698 | ||
699 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
700 | if (ret < 0) { | |
701 | goto error; | |
702 | } | |
703 | ||
704 | /* Add quit pipe */ | |
c7759e6a | 705 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
706 | if (ret < 0) { |
707 | goto error; | |
708 | } | |
709 | ||
710 | return 0; | |
711 | ||
712 | error: | |
713 | return ret; | |
714 | } | |
715 | ||
716 | /* | |
717 | * Check if the thread quit pipe was triggered. | |
718 | * | |
719 | * Return 1 if it was triggered else 0; | |
720 | */ | |
7591bab1 | 721 | static int check_thread_quit_pipe(int fd, uint32_t events) |
b8aa1682 JD |
722 | { |
723 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
724 | return 1; | |
725 | } | |
726 | ||
727 | return 0; | |
728 | } | |
729 | ||
730 | /* | |
731 | * Create and init socket from uri. | |
732 | */ | |
7591bab1 | 733 | static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri) |
b8aa1682 JD |
734 | { |
735 | int ret; | |
736 | struct lttcomm_sock *sock = NULL; | |
737 | ||
738 | sock = lttcomm_alloc_sock_from_uri(uri); | |
739 | if (sock == NULL) { | |
740 | ERR("Allocating socket"); | |
741 | goto error; | |
742 | } | |
743 | ||
744 | ret = lttcomm_create_sock(sock); | |
745 | if (ret < 0) { | |
746 | goto error; | |
747 | } | |
748 | DBG("Listening on sock %d", sock->fd); | |
749 | ||
750 | ret = sock->ops->bind(sock); | |
751 | if (ret < 0) { | |
752 | goto error; | |
753 | } | |
754 | ||
755 | ret = sock->ops->listen(sock, -1); | |
756 | if (ret < 0) { | |
757 | goto error; | |
758 | ||
759 | } | |
760 | ||
761 | return sock; | |
762 | ||
763 | error: | |
764 | if (sock) { | |
765 | lttcomm_destroy_sock(sock); | |
766 | } | |
767 | return NULL; | |
768 | } | |
769 | ||
770 | /* | |
771 | * This thread manages the listening for new connections on the network | |
772 | */ | |
7591bab1 | 773 | static void *relay_thread_listener(void *data) |
b8aa1682 | 774 | { |
095a4ae5 | 775 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
776 | uint32_t revents, nb_fd; |
777 | struct lttng_poll_event events; | |
778 | struct lttcomm_sock *control_sock, *data_sock; | |
779 | ||
b8aa1682 JD |
780 | DBG("[thread] Relay listener started"); |
781 | ||
55706a7d MD |
782 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
783 | ||
f385ae0a MD |
784 | health_code_update(); |
785 | ||
7591bab1 | 786 | control_sock = relay_socket_create(control_uri); |
b8aa1682 | 787 | if (!control_sock) { |
095a4ae5 | 788 | goto error_sock_control; |
b8aa1682 JD |
789 | } |
790 | ||
7591bab1 | 791 | data_sock = relay_socket_create(data_uri); |
b8aa1682 | 792 | if (!data_sock) { |
095a4ae5 | 793 | goto error_sock_relay; |
b8aa1682 JD |
794 | } |
795 | ||
796 | /* | |
7591bab1 MD |
797 | * Pass 3 as size here for the thread quit pipe, control and |
798 | * data socket. | |
b8aa1682 JD |
799 | */ |
800 | ret = create_thread_poll_set(&events, 3); | |
801 | if (ret < 0) { | |
802 | goto error_create_poll; | |
803 | } | |
804 | ||
805 | /* Add the control socket */ | |
806 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
807 | if (ret < 0) { | |
808 | goto error_poll_add; | |
809 | } | |
810 | ||
811 | /* Add the data socket */ | |
812 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
813 | if (ret < 0) { | |
814 | goto error_poll_add; | |
815 | } | |
816 | ||
3fd27398 MD |
817 | lttng_relay_notify_ready(); |
818 | ||
9b5e0863 MD |
819 | if (testpoint(relayd_thread_listener)) { |
820 | goto error_testpoint; | |
821 | } | |
822 | ||
b8aa1682 | 823 | while (1) { |
f385ae0a MD |
824 | health_code_update(); |
825 | ||
b8aa1682 JD |
826 | DBG("Listener accepting connections"); |
827 | ||
b8aa1682 | 828 | restart: |
f385ae0a | 829 | health_poll_entry(); |
b8aa1682 | 830 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 831 | health_poll_exit(); |
b8aa1682 JD |
832 | if (ret < 0) { |
833 | /* | |
834 | * Restart interrupted system call. | |
835 | */ | |
836 | if (errno == EINTR) { | |
837 | goto restart; | |
838 | } | |
839 | goto error; | |
840 | } | |
841 | ||
0d9c5d77 DG |
842 | nb_fd = ret; |
843 | ||
b8aa1682 JD |
844 | DBG("Relay new connection received"); |
845 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
846 | health_code_update(); |
847 | ||
b8aa1682 JD |
848 | /* Fetch once the poll data */ |
849 | revents = LTTNG_POLL_GETEV(&events, i); | |
850 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
851 | ||
fd20dac9 | 852 | if (!revents) { |
7591bab1 MD |
853 | /* |
854 | * No activity for this FD (poll | |
855 | * implementation). | |
856 | */ | |
fd20dac9 MD |
857 | continue; |
858 | } | |
859 | ||
b8aa1682 JD |
860 | /* Thread quit pipe has been closed. Killing thread. */ |
861 | ret = check_thread_quit_pipe(pollfd, revents); | |
862 | if (ret) { | |
095a4ae5 MD |
863 | err = 0; |
864 | goto exit; | |
b8aa1682 JD |
865 | } |
866 | ||
03e43155 | 867 | if (revents & LPOLLIN) { |
4b7f17b2 | 868 | /* |
7591bab1 MD |
869 | * A new connection is requested, therefore a |
870 | * sessiond/consumerd connection is allocated in | |
871 | * this thread, enqueued to a global queue and | |
872 | * dequeued (and freed) in the worker thread. | |
4b7f17b2 | 873 | */ |
58eb9381 DG |
874 | int val = 1; |
875 | struct relay_connection *new_conn; | |
4b7f17b2 | 876 | struct lttcomm_sock *newsock; |
7591bab1 | 877 | enum connection_type type; |
b8aa1682 JD |
878 | |
879 | if (pollfd == data_sock->fd) { | |
7591bab1 | 880 | type = RELAY_DATA; |
b8aa1682 | 881 | newsock = data_sock->ops->accept(data_sock); |
58eb9381 DG |
882 | DBG("Relay data connection accepted, socket %d", |
883 | newsock->fd); | |
4b7f17b2 MD |
884 | } else { |
885 | assert(pollfd == control_sock->fd); | |
7591bab1 | 886 | type = RELAY_CONTROL; |
b8aa1682 | 887 | newsock = control_sock->ops->accept(control_sock); |
58eb9381 DG |
888 | DBG("Relay control connection accepted, socket %d", |
889 | newsock->fd); | |
b8aa1682 | 890 | } |
58eb9381 DG |
891 | if (!newsock) { |
892 | PERROR("accepting sock"); | |
58eb9381 DG |
893 | goto error; |
894 | } | |
895 | ||
896 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
897 | sizeof(val)); | |
b8aa1682 JD |
898 | if (ret < 0) { |
899 | PERROR("setsockopt inet"); | |
4b7f17b2 | 900 | lttcomm_destroy_sock(newsock); |
b8aa1682 JD |
901 | goto error; |
902 | } | |
f056029c JR |
903 | |
904 | ret = socket_apply_keep_alive_config(newsock->fd); | |
905 | if (ret < 0) { | |
906 | ERR("Failed to apply TCP keep-alive configuration on socket (%i)", | |
907 | newsock->fd); | |
908 | lttcomm_destroy_sock(newsock); | |
909 | goto error; | |
910 | } | |
911 | ||
7591bab1 MD |
912 | new_conn = connection_create(newsock, type); |
913 | if (!new_conn) { | |
914 | lttcomm_destroy_sock(newsock); | |
915 | goto error; | |
916 | } | |
58eb9381 DG |
917 | |
918 | /* Enqueue request for the dispatcher thread. */ | |
8bdee6e2 SM |
919 | cds_wfcq_enqueue(&relay_conn_queue.head, &relay_conn_queue.tail, |
920 | &new_conn->qnode); | |
b8aa1682 JD |
921 | |
922 | /* | |
7591bab1 MD |
923 | * Wake the dispatch queue futex. |
924 | * Implicit memory barrier with the | |
925 | * exchange in cds_wfcq_enqueue. | |
b8aa1682 | 926 | */ |
58eb9381 | 927 | futex_nto1_wake(&relay_conn_queue.futex); |
03e43155 MD |
928 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
929 | ERR("socket poll error"); | |
930 | goto error; | |
931 | } else { | |
932 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
933 | goto error; | |
b8aa1682 JD |
934 | } |
935 | } | |
936 | } | |
937 | ||
095a4ae5 | 938 | exit: |
b8aa1682 JD |
939 | error: |
940 | error_poll_add: | |
9b5e0863 | 941 | error_testpoint: |
b8aa1682 JD |
942 | lttng_poll_clean(&events); |
943 | error_create_poll: | |
095a4ae5 MD |
944 | if (data_sock->fd >= 0) { |
945 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
946 | if (ret) { |
947 | PERROR("close"); | |
948 | } | |
b8aa1682 | 949 | } |
095a4ae5 MD |
950 | lttcomm_destroy_sock(data_sock); |
951 | error_sock_relay: | |
952 | if (control_sock->fd >= 0) { | |
953 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
954 | if (ret) { |
955 | PERROR("close"); | |
956 | } | |
b8aa1682 | 957 | } |
095a4ae5 MD |
958 | lttcomm_destroy_sock(control_sock); |
959 | error_sock_control: | |
960 | if (err) { | |
f385ae0a MD |
961 | health_error(); |
962 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 963 | } |
55706a7d | 964 | health_unregister(health_relayd); |
b8aa1682 | 965 | DBG("Relay listener thread cleanup complete"); |
b4aacfdc | 966 | lttng_relay_stop_threads(); |
b8aa1682 JD |
967 | return NULL; |
968 | } | |
969 | ||
970 | /* | |
971 | * This thread manages the dispatching of the requests to worker threads | |
972 | */ | |
7591bab1 | 973 | static void *relay_thread_dispatcher(void *data) |
b8aa1682 | 974 | { |
6cd525e8 MD |
975 | int err = -1; |
976 | ssize_t ret; | |
8bdee6e2 | 977 | struct cds_wfcq_node *node; |
58eb9381 | 978 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
979 | |
980 | DBG("[thread] Relay dispatcher started"); | |
981 | ||
55706a7d MD |
982 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
983 | ||
9b5e0863 MD |
984 | if (testpoint(relayd_thread_dispatcher)) { |
985 | goto error_testpoint; | |
986 | } | |
987 | ||
f385ae0a MD |
988 | health_code_update(); |
989 | ||
0ed3b1a8 | 990 | for (;;) { |
f385ae0a MD |
991 | health_code_update(); |
992 | ||
b8aa1682 | 993 | /* Atomically prepare the queue futex */ |
58eb9381 | 994 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 | 995 | |
0ed3b1a8 MD |
996 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
997 | break; | |
998 | } | |
999 | ||
b8aa1682 | 1000 | do { |
f385ae0a MD |
1001 | health_code_update(); |
1002 | ||
b8aa1682 | 1003 | /* Dequeue commands */ |
8bdee6e2 SM |
1004 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
1005 | &relay_conn_queue.tail); | |
b8aa1682 JD |
1006 | if (node == NULL) { |
1007 | DBG("Woken up but nothing in the relay command queue"); | |
1008 | /* Continue thread execution */ | |
1009 | break; | |
1010 | } | |
58eb9381 | 1011 | new_conn = caa_container_of(node, struct relay_connection, qnode); |
b8aa1682 | 1012 | |
58eb9381 | 1013 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
1014 | |
1015 | /* | |
7591bab1 MD |
1016 | * Inform worker thread of the new request. This |
1017 | * call is blocking so we can be assured that | |
1018 | * the data will be read at some point in time | |
1019 | * or wait to the end of the world :) | |
b8aa1682 | 1020 | */ |
58eb9381 DG |
1021 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
1022 | if (ret < 0) { | |
1023 | PERROR("write connection pipe"); | |
7591bab1 | 1024 | connection_put(new_conn); |
b8aa1682 JD |
1025 | goto error; |
1026 | } | |
1027 | } while (node != NULL); | |
1028 | ||
1029 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 1030 | health_poll_entry(); |
58eb9381 | 1031 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 1032 | health_poll_exit(); |
b8aa1682 JD |
1033 | } |
1034 | ||
f385ae0a MD |
1035 | /* Normal exit, no error */ |
1036 | err = 0; | |
1037 | ||
b8aa1682 | 1038 | error: |
9b5e0863 | 1039 | error_testpoint: |
f385ae0a MD |
1040 | if (err) { |
1041 | health_error(); | |
1042 | ERR("Health error occurred in %s", __func__); | |
1043 | } | |
55706a7d | 1044 | health_unregister(health_relayd); |
b8aa1682 | 1045 | DBG("Dispatch thread dying"); |
b4aacfdc | 1046 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1047 | return NULL; |
1048 | } | |
1049 | ||
b8aa1682 | 1050 | /* |
7591bab1 | 1051 | * Set index data from the control port to a given index object. |
b8aa1682 | 1052 | */ |
7591bab1 | 1053 | static int set_index_control_data(struct relay_index *index, |
234cd636 JD |
1054 | struct lttcomm_relayd_index *data, |
1055 | struct relay_connection *conn) | |
1c20f0e2 | 1056 | { |
7591bab1 | 1057 | struct ctf_packet_index index_data; |
1c20f0e2 JD |
1058 | |
1059 | /* | |
7591bab1 MD |
1060 | * The index on disk is encoded in big endian, so we don't need |
1061 | * to convert the data received on the network. The data_offset | |
1062 | * value is NEVER modified here and is updated by the data | |
1063 | * thread. | |
1c20f0e2 | 1064 | */ |
7591bab1 MD |
1065 | index_data.packet_size = data->packet_size; |
1066 | index_data.content_size = data->content_size; | |
1067 | index_data.timestamp_begin = data->timestamp_begin; | |
1068 | index_data.timestamp_end = data->timestamp_end; | |
1069 | index_data.events_discarded = data->events_discarded; | |
1070 | index_data.stream_id = data->stream_id; | |
234cd636 JD |
1071 | |
1072 | if (conn->minor >= 8) { | |
1073 | index->index_data.stream_instance_id = data->stream_instance_id; | |
1074 | index->index_data.packet_seq_num = data->packet_seq_num; | |
1075 | } | |
1076 | ||
7591bab1 | 1077 | return relay_index_set_data(index, &index_data); |
1c20f0e2 JD |
1078 | } |
1079 | ||
c5b6f4f0 DG |
1080 | /* |
1081 | * Handle the RELAYD_CREATE_SESSION command. | |
1082 | * | |
1083 | * On success, send back the session id or else return a negative value. | |
1084 | */ | |
7591bab1 | 1085 | static 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; | |
36d2e35d | 1091 | char session_name[LTTNG_NAME_MAX]; |
9cf3eb20 | 1092 | char hostname[LTTNG_HOST_NAME_MAX]; |
7591bab1 MD |
1093 | uint32_t live_timer = 0; |
1094 | bool snapshot = false; | |
c5b6f4f0 | 1095 | |
36d2e35d | 1096 | memset(session_name, 0, LTTNG_NAME_MAX); |
9cf3eb20 | 1097 | memset(hostname, 0, LTTNG_HOST_NAME_MAX); |
c5b6f4f0 DG |
1098 | |
1099 | memset(&reply, 0, sizeof(reply)); | |
1100 | ||
58eb9381 | 1101 | switch (conn->minor) { |
2a174661 DG |
1102 | case 1: |
1103 | case 2: | |
1104 | case 3: | |
1105 | break; | |
1106 | case 4: /* LTTng sessiond 2.4 */ | |
1107 | default: | |
7591bab1 MD |
1108 | ret = cmd_create_session_2_4(conn, session_name, |
1109 | hostname, &live_timer, &snapshot); | |
1110 | } | |
1111 | if (ret < 0) { | |
1112 | goto send_reply; | |
d3e2ba59 JD |
1113 | } |
1114 | ||
7591bab1 MD |
1115 | session = session_create(session_name, hostname, live_timer, |
1116 | snapshot, conn->major, conn->minor); | |
1117 | if (!session) { | |
1118 | ret = -1; | |
1119 | goto send_reply; | |
1120 | } | |
1121 | assert(!conn->session); | |
1122 | conn->session = session; | |
c5b6f4f0 DG |
1123 | DBG("Created session %" PRIu64, session->id); |
1124 | ||
7591bab1 MD |
1125 | reply.session_id = htobe64(session->id); |
1126 | ||
1127 | send_reply: | |
c5b6f4f0 DG |
1128 | if (ret < 0) { |
1129 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
1130 | } else { | |
1131 | reply.ret_code = htobe32(LTTNG_OK); | |
1132 | } | |
1133 | ||
58eb9381 | 1134 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c5b6f4f0 DG |
1135 | if (send_ret < 0) { |
1136 | ERR("Relayd sending session id"); | |
4169f5ad | 1137 | ret = send_ret; |
c5b6f4f0 DG |
1138 | } |
1139 | ||
1140 | return ret; | |
1141 | } | |
1142 | ||
a4baae1b JD |
1143 | /* |
1144 | * When we have received all the streams and the metadata for a channel, | |
1145 | * we make them visible to the viewer threads. | |
1146 | */ | |
7591bab1 | 1147 | static void publish_connection_local_streams(struct relay_connection *conn) |
a4baae1b | 1148 | { |
7591bab1 MD |
1149 | struct relay_stream *stream; |
1150 | struct relay_session *session = conn->session; | |
a4baae1b | 1151 | |
7591bab1 MD |
1152 | /* |
1153 | * We publish all streams belonging to a session atomically wrt | |
1154 | * session lock. | |
1155 | */ | |
1156 | pthread_mutex_lock(&session->lock); | |
1157 | rcu_read_lock(); | |
1158 | cds_list_for_each_entry_rcu(stream, &session->recv_list, | |
1159 | recv_node) { | |
1160 | stream_publish(stream); | |
a4baae1b | 1161 | } |
7591bab1 | 1162 | rcu_read_unlock(); |
a4baae1b | 1163 | |
7591bab1 MD |
1164 | /* |
1165 | * Inform the viewer that there are new streams in the session. | |
1166 | */ | |
1167 | if (session->viewer_attached) { | |
1168 | uatomic_set(&session->new_streams, 1); | |
1169 | } | |
1170 | pthread_mutex_unlock(&session->lock); | |
a4baae1b JD |
1171 | } |
1172 | ||
b8aa1682 JD |
1173 | /* |
1174 | * relay_add_stream: allocate a new stream for a session | |
1175 | */ | |
7591bab1 | 1176 | static int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1177 | struct relay_connection *conn) |
b8aa1682 | 1178 | { |
7591bab1 MD |
1179 | int ret; |
1180 | ssize_t send_ret; | |
58eb9381 | 1181 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1182 | struct relay_stream *stream = NULL; |
1183 | struct lttcomm_relayd_status_stream reply; | |
4030a636 | 1184 | struct ctf_trace *trace = NULL; |
7591bab1 MD |
1185 | uint64_t stream_handle = -1ULL; |
1186 | char *path_name = NULL, *channel_name = NULL; | |
1187 | uint64_t tracefile_size = 0, tracefile_count = 0; | |
b8aa1682 | 1188 | |
58eb9381 | 1189 | if (!session || conn->version_check_done == 0) { |
b8aa1682 JD |
1190 | ERR("Trying to add a stream before version check"); |
1191 | ret = -1; | |
1192 | goto end_no_session; | |
1193 | } | |
1194 | ||
7591bab1 MD |
1195 | switch (session->minor) { |
1196 | case 1: /* LTTng sessiond 2.1. Allocates path_name and channel_name. */ | |
1197 | ret = cmd_recv_stream_2_1(conn, &path_name, | |
1198 | &channel_name); | |
0f907de1 | 1199 | break; |
7591bab1 | 1200 | case 2: /* LTTng sessiond 2.2. Allocates path_name and channel_name. */ |
0f907de1 | 1201 | default: |
7591bab1 MD |
1202 | ret = cmd_recv_stream_2_2(conn, &path_name, |
1203 | &channel_name, &tracefile_size, &tracefile_count); | |
0f907de1 JD |
1204 | break; |
1205 | } | |
1206 | if (ret < 0) { | |
7591bab1 | 1207 | goto send_reply; |
b8aa1682 JD |
1208 | } |
1209 | ||
7591bab1 | 1210 | trace = ctf_trace_get_by_path_or_create(session, path_name); |
2a174661 | 1211 | if (!trace) { |
7591bab1 | 1212 | goto send_reply; |
2a174661 | 1213 | } |
7591bab1 | 1214 | /* This stream here has one reference on the trace. */ |
2a174661 | 1215 | |
7591bab1 MD |
1216 | pthread_mutex_lock(&last_relay_stream_id_lock); |
1217 | stream_handle = ++last_relay_stream_id; | |
1218 | pthread_mutex_unlock(&last_relay_stream_id_lock); | |
d3e2ba59 | 1219 | |
7591bab1 MD |
1220 | /* We pass ownership of path_name and channel_name. */ |
1221 | stream = stream_create(trace, stream_handle, path_name, | |
1222 | channel_name, tracefile_size, tracefile_count); | |
1223 | path_name = NULL; | |
1224 | channel_name = NULL; | |
a4baae1b | 1225 | |
2a174661 | 1226 | /* |
7591bab1 MD |
1227 | * Streams are the owners of their trace. Reference to trace is |
1228 | * kept within stream_create(). | |
2a174661 | 1229 | */ |
7591bab1 | 1230 | ctf_trace_put(trace); |
d3e2ba59 | 1231 | |
7591bab1 | 1232 | send_reply: |
53efb85a | 1233 | memset(&reply, 0, sizeof(reply)); |
7591bab1 MD |
1234 | reply.handle = htobe64(stream_handle); |
1235 | if (!stream) { | |
f73fabfd | 1236 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 1237 | } else { |
f73fabfd | 1238 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1239 | } |
5af40280 | 1240 | |
58eb9381 | 1241 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1242 | sizeof(struct lttcomm_relayd_status_stream), 0); |
1243 | if (send_ret < 0) { | |
1244 | ERR("Relay sending stream id"); | |
7591bab1 | 1245 | ret = (int) send_ret; |
b8aa1682 JD |
1246 | } |
1247 | ||
1248 | end_no_session: | |
7591bab1 MD |
1249 | free(path_name); |
1250 | free(channel_name); | |
0f907de1 | 1251 | return ret; |
b8aa1682 JD |
1252 | } |
1253 | ||
173af62f DG |
1254 | /* |
1255 | * relay_close_stream: close a specific stream | |
1256 | */ | |
7591bab1 | 1257 | static int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1258 | struct relay_connection *conn) |
173af62f | 1259 | { |
94d49140 | 1260 | int ret, send_ret; |
58eb9381 | 1261 | struct relay_session *session = conn->session; |
173af62f DG |
1262 | struct lttcomm_relayd_close_stream stream_info; |
1263 | struct lttcomm_relayd_generic_reply reply; | |
1264 | struct relay_stream *stream; | |
173af62f DG |
1265 | |
1266 | DBG("Close stream received"); | |
1267 | ||
58eb9381 | 1268 | if (!session || conn->version_check_done == 0) { |
173af62f DG |
1269 | ERR("Trying to close a stream before version check"); |
1270 | ret = -1; | |
1271 | goto end_no_session; | |
1272 | } | |
1273 | ||
58eb9381 | 1274 | ret = conn->sock->ops->recvmsg(conn->sock, &stream_info, |
7c5aef62 | 1275 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f | 1276 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
a6cd2b97 DG |
1277 | if (ret == 0) { |
1278 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1279 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1280 | } else { |
1281 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
1282 | } | |
173af62f DG |
1283 | ret = -1; |
1284 | goto end_no_session; | |
1285 | } | |
1286 | ||
7591bab1 | 1287 | stream = stream_get_by_id(be64toh(stream_info.stream_id)); |
173af62f DG |
1288 | if (!stream) { |
1289 | ret = -1; | |
7591bab1 | 1290 | goto end; |
173af62f | 1291 | } |
77f7bd85 MD |
1292 | |
1293 | /* | |
1294 | * Set last_net_seq_num before the close flag. Required by data | |
1295 | * pending check. | |
1296 | */ | |
7591bab1 | 1297 | pthread_mutex_lock(&stream->lock); |
8e2583a4 | 1298 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
77f7bd85 MD |
1299 | pthread_mutex_unlock(&stream->lock); |
1300 | ||
bda7c7b9 JG |
1301 | /* |
1302 | * This is one of the conditions which may trigger a stream close | |
1303 | * with the others being: | |
1304 | * 1) A close command is received for a stream | |
1305 | * 2) The control connection owning the stream is closed | |
1306 | * 3) We have received all of the stream's data _after_ a close | |
1307 | * request. | |
1308 | */ | |
1309 | try_stream_close(stream); | |
7591bab1 MD |
1310 | if (stream->is_metadata) { |
1311 | struct relay_viewer_stream *vstream; | |
173af62f | 1312 | |
7591bab1 MD |
1313 | vstream = viewer_stream_get_by_id(stream->stream_handle); |
1314 | if (vstream) { | |
1315 | if (vstream->metadata_sent == stream->metadata_received) { | |
1316 | /* | |
1317 | * Since all the metadata has been sent to the | |
1318 | * viewer and that we have a request to close | |
1319 | * its stream, we can safely teardown the | |
1320 | * corresponding metadata viewer stream. | |
1321 | */ | |
1322 | viewer_stream_put(vstream); | |
1323 | } | |
1324 | /* Put local reference. */ | |
1325 | viewer_stream_put(vstream); | |
1326 | } | |
1327 | } | |
7591bab1 | 1328 | stream_put(stream); |
173af62f | 1329 | |
7591bab1 | 1330 | end: |
53efb85a | 1331 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1332 | if (ret < 0) { |
f73fabfd | 1333 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1334 | } else { |
f73fabfd | 1335 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1336 | } |
58eb9381 | 1337 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f DG |
1338 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1339 | if (send_ret < 0) { | |
1340 | ERR("Relay sending stream id"); | |
4169f5ad | 1341 | ret = send_ret; |
173af62f DG |
1342 | } |
1343 | ||
1344 | end_no_session: | |
1345 | return ret; | |
1346 | } | |
1347 | ||
93ec662e JD |
1348 | /* |
1349 | * relay_reset_metadata: reset a metadata stream | |
1350 | */ | |
1351 | static | |
1352 | int relay_reset_metadata(struct lttcomm_relayd_hdr *recv_hdr, | |
1353 | struct relay_connection *conn) | |
1354 | { | |
1355 | int ret, send_ret; | |
1356 | struct relay_session *session = conn->session; | |
1357 | struct lttcomm_relayd_reset_metadata stream_info; | |
1358 | struct lttcomm_relayd_generic_reply reply; | |
1359 | struct relay_stream *stream; | |
1360 | ||
1361 | DBG("Reset metadata received"); | |
1362 | ||
1363 | if (!session || conn->version_check_done == 0) { | |
1364 | ERR("Trying to reset a metadata stream before version check"); | |
1365 | ret = -1; | |
1366 | goto end_no_session; | |
1367 | } | |
1368 | ||
1369 | ret = conn->sock->ops->recvmsg(conn->sock, &stream_info, | |
1370 | sizeof(struct lttcomm_relayd_reset_metadata), 0); | |
1371 | if (ret < sizeof(struct lttcomm_relayd_reset_metadata)) { | |
1372 | if (ret == 0) { | |
1373 | /* Orderly shutdown. Not necessary to print an error. */ | |
1374 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); | |
1375 | } else { | |
1376 | ERR("Relay didn't receive valid reset_metadata struct " | |
1377 | "size : %d", ret); | |
1378 | } | |
1379 | ret = -1; | |
1380 | goto end_no_session; | |
1381 | } | |
1382 | DBG("Update metadata to version %" PRIu64, be64toh(stream_info.version)); | |
1383 | ||
1384 | /* Unsupported for live sessions for now. */ | |
1385 | if (session->live_timer != 0) { | |
1386 | ret = -1; | |
1387 | goto end; | |
1388 | } | |
1389 | ||
1390 | stream = stream_get_by_id(be64toh(stream_info.stream_id)); | |
1391 | if (!stream) { | |
1392 | ret = -1; | |
1393 | goto end; | |
1394 | } | |
1395 | pthread_mutex_lock(&stream->lock); | |
1396 | if (!stream->is_metadata) { | |
1397 | ret = -1; | |
1398 | goto end_unlock; | |
1399 | } | |
1400 | ||
1401 | ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, | |
1402 | 0, 0, -1, -1, stream->stream_fd->fd, NULL, | |
1403 | &stream->stream_fd->fd); | |
1404 | if (ret < 0) { | |
1405 | ERR("Failed to rotate metadata file %s of channel %s", | |
1406 | stream->path_name, stream->channel_name); | |
1407 | goto end_unlock; | |
1408 | } | |
1409 | ||
1410 | end_unlock: | |
1411 | pthread_mutex_unlock(&stream->lock); | |
1412 | stream_put(stream); | |
1413 | ||
1414 | end: | |
1415 | memset(&reply, 0, sizeof(reply)); | |
1416 | if (ret < 0) { | |
1417 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1418 | } else { | |
1419 | reply.ret_code = htobe32(LTTNG_OK); | |
1420 | } | |
1421 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1422 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1423 | if (send_ret < 0) { | |
1424 | ERR("Relay sending reset metadata reply"); | |
1425 | ret = send_ret; | |
1426 | } | |
1427 | ||
1428 | end_no_session: | |
1429 | return ret; | |
1430 | } | |
1431 | ||
b8aa1682 JD |
1432 | /* |
1433 | * relay_unknown_command: send -1 if received unknown command | |
1434 | */ | |
7591bab1 | 1435 | static void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1436 | { |
1437 | struct lttcomm_relayd_generic_reply reply; | |
1438 | int ret; | |
1439 | ||
53efb85a | 1440 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1441 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1442 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1443 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1444 | if (ret < 0) { | |
1445 | ERR("Relay sending unknown command"); | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | /* | |
1450 | * relay_start: send an acknowledgment to the client to tell if we are | |
1451 | * ready to receive data. We are ready if a session is established. | |
1452 | */ | |
7591bab1 | 1453 | static int relay_start(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1454 | struct relay_connection *conn) |
b8aa1682 | 1455 | { |
f73fabfd | 1456 | int ret = htobe32(LTTNG_OK); |
b8aa1682 | 1457 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1458 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1459 | |
1460 | if (!session) { | |
1461 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1462 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1463 | } |
1464 | ||
53efb85a | 1465 | memset(&reply, 0, sizeof(reply)); |
b8aa1682 | 1466 | reply.ret_code = ret; |
58eb9381 | 1467 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1468 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1469 | if (ret < 0) { | |
1470 | ERR("Relay sending start ack"); | |
1471 | } | |
1472 | ||
1473 | return ret; | |
1474 | } | |
1475 | ||
1d4dfdef DG |
1476 | /* |
1477 | * Append padding to the file pointed by the file descriptor fd. | |
1478 | */ | |
1479 | static int write_padding_to_file(int fd, uint32_t size) | |
1480 | { | |
6cd525e8 | 1481 | ssize_t ret = 0; |
1d4dfdef DG |
1482 | char *zeros; |
1483 | ||
1484 | if (size == 0) { | |
1485 | goto end; | |
1486 | } | |
1487 | ||
1488 | zeros = zmalloc(size); | |
1489 | if (zeros == NULL) { | |
1490 | PERROR("zmalloc zeros for padding"); | |
1491 | ret = -1; | |
1492 | goto end; | |
1493 | } | |
1494 | ||
6cd525e8 MD |
1495 | ret = lttng_write(fd, zeros, size); |
1496 | if (ret < size) { | |
1d4dfdef DG |
1497 | PERROR("write padding to file"); |
1498 | } | |
1499 | ||
e986c7a1 DG |
1500 | free(zeros); |
1501 | ||
1d4dfdef DG |
1502 | end: |
1503 | return ret; | |
1504 | } | |
1505 | ||
b8aa1682 | 1506 | /* |
7591bab1 | 1507 | * relay_recv_metadata: receive the metadata for the session. |
b8aa1682 | 1508 | */ |
7591bab1 | 1509 | static int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1510 | struct relay_connection *conn) |
b8aa1682 | 1511 | { |
32d1569c | 1512 | int ret = 0; |
6cd525e8 | 1513 | ssize_t size_ret; |
58eb9381 | 1514 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1515 | struct lttcomm_relayd_metadata_payload *metadata_struct; |
1516 | struct relay_stream *metadata_stream; | |
1517 | uint64_t data_size, payload_size; | |
1518 | ||
1519 | if (!session) { | |
1520 | ERR("Metadata sent before version check"); | |
1521 | ret = -1; | |
1522 | goto end; | |
1523 | } | |
1524 | ||
f6416125 MD |
1525 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1526 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1527 | ERR("Incorrect data size"); | |
1528 | ret = -1; | |
1529 | goto end; | |
1530 | } | |
1531 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1532 | ||
b8aa1682 | 1533 | if (data_buffer_size < data_size) { |
d7b3776f | 1534 | /* In case the realloc fails, we can free the memory */ |
c617c0c6 MD |
1535 | char *tmp_data_ptr; |
1536 | ||
1537 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1538 | if (!tmp_data_ptr) { | |
b8aa1682 | 1539 | ERR("Allocating data buffer"); |
c617c0c6 | 1540 | free(data_buffer); |
b8aa1682 JD |
1541 | ret = -1; |
1542 | goto end; | |
1543 | } | |
c617c0c6 | 1544 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1545 | data_buffer_size = data_size; |
1546 | } | |
1547 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1548 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
32d1569c JG |
1549 | size_ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0); |
1550 | if (size_ret < 0 || size_ret != data_size) { | |
1551 | if (size_ret == 0) { | |
a6cd2b97 | 1552 | /* Orderly shutdown. Not necessary to print an error. */ |
58eb9381 | 1553 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1554 | } else { |
1555 | ERR("Relay didn't receive the whole metadata"); | |
1556 | } | |
b8aa1682 | 1557 | ret = -1; |
b8aa1682 JD |
1558 | goto end; |
1559 | } | |
1560 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 | 1561 | |
7591bab1 | 1562 | metadata_stream = stream_get_by_id(be64toh(metadata_struct->stream_id)); |
b8aa1682 JD |
1563 | if (!metadata_stream) { |
1564 | ret = -1; | |
7591bab1 | 1565 | goto end; |
b8aa1682 JD |
1566 | } |
1567 | ||
7591bab1 MD |
1568 | pthread_mutex_lock(&metadata_stream->lock); |
1569 | ||
1570 | size_ret = lttng_write(metadata_stream->stream_fd->fd, metadata_struct->payload, | |
6cd525e8 MD |
1571 | payload_size); |
1572 | if (size_ret < payload_size) { | |
b8aa1682 JD |
1573 | ERR("Relay error writing metadata on file"); |
1574 | ret = -1; | |
7591bab1 | 1575 | goto end_put; |
b8aa1682 | 1576 | } |
1d4dfdef | 1577 | |
32d1569c | 1578 | size_ret = write_padding_to_file(metadata_stream->stream_fd->fd, |
1d4dfdef | 1579 | be32toh(metadata_struct->padding_size)); |
32d1569c | 1580 | if (size_ret < 0) { |
7591bab1 | 1581 | goto end_put; |
1d4dfdef | 1582 | } |
2a174661 | 1583 | |
7591bab1 | 1584 | metadata_stream->metadata_received += |
d3e2ba59 | 1585 | payload_size + be32toh(metadata_struct->padding_size); |
7591bab1 MD |
1586 | DBG2("Relay metadata written. Updated metadata_received %" PRIu64, |
1587 | metadata_stream->metadata_received); | |
1d4dfdef | 1588 | |
7591bab1 MD |
1589 | end_put: |
1590 | pthread_mutex_unlock(&metadata_stream->lock); | |
1591 | stream_put(metadata_stream); | |
b8aa1682 JD |
1592 | end: |
1593 | return ret; | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * relay_send_version: send relayd version number | |
1598 | */ | |
7591bab1 | 1599 | static int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1600 | struct relay_connection *conn) |
b8aa1682 | 1601 | { |
7f51dcba | 1602 | int ret; |
092b6259 | 1603 | struct lttcomm_relayd_version reply, msg; |
87cb6359 | 1604 | bool compatible = true; |
b8aa1682 | 1605 | |
58eb9381 | 1606 | conn->version_check_done = 1; |
b8aa1682 | 1607 | |
092b6259 | 1608 | /* Get version from the other side. */ |
58eb9381 | 1609 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
092b6259 | 1610 | if (ret < 0 || ret != sizeof(msg)) { |
a6cd2b97 DG |
1611 | if (ret == 0) { |
1612 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1613 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1614 | } else { |
1615 | ERR("Relay failed to receive the version values."); | |
1616 | } | |
092b6259 | 1617 | ret = -1; |
092b6259 DG |
1618 | goto end; |
1619 | } | |
1620 | ||
53efb85a | 1621 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
1622 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1623 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1624 | |
1625 | /* Major versions must be the same */ | |
1626 | if (reply.major != be32toh(msg.major)) { | |
6151a90f JD |
1627 | DBG("Incompatible major versions (%u vs %u), deleting session", |
1628 | reply.major, be32toh(msg.major)); | |
87cb6359 | 1629 | compatible = false; |
d4519fa3 JD |
1630 | } |
1631 | ||
58eb9381 | 1632 | conn->major = reply.major; |
0f907de1 JD |
1633 | /* We adapt to the lowest compatible version */ |
1634 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 1635 | conn->minor = reply.minor; |
0f907de1 | 1636 | } else { |
58eb9381 | 1637 | conn->minor = be32toh(msg.minor); |
0f907de1 JD |
1638 | } |
1639 | ||
6151a90f JD |
1640 | reply.major = htobe32(reply.major); |
1641 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 1642 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
6151a90f JD |
1643 | sizeof(struct lttcomm_relayd_version), 0); |
1644 | if (ret < 0) { | |
1645 | ERR("Relay sending version"); | |
1646 | } | |
1647 | ||
87cb6359 JD |
1648 | if (!compatible) { |
1649 | ret = -1; | |
1650 | goto end; | |
1651 | } | |
1652 | ||
58eb9381 DG |
1653 | DBG("Version check done using protocol %u.%u", conn->major, |
1654 | conn->minor); | |
b8aa1682 JD |
1655 | |
1656 | end: | |
1657 | return ret; | |
1658 | } | |
1659 | ||
c8f59ee5 | 1660 | /* |
6d805429 | 1661 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 | 1662 | */ |
7591bab1 | 1663 | static int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1664 | struct relay_connection *conn) |
c8f59ee5 | 1665 | { |
58eb9381 | 1666 | struct relay_session *session = conn->session; |
6d805429 | 1667 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1668 | struct lttcomm_relayd_generic_reply reply; |
1669 | struct relay_stream *stream; | |
1670 | int ret; | |
c8f59ee5 DG |
1671 | uint64_t last_net_seq_num, stream_id; |
1672 | ||
6d805429 | 1673 | DBG("Data pending command received"); |
c8f59ee5 | 1674 | |
58eb9381 | 1675 | if (!session || conn->version_check_done == 0) { |
c8f59ee5 DG |
1676 | ERR("Trying to check for data before version check"); |
1677 | ret = -1; | |
1678 | goto end_no_session; | |
1679 | } | |
1680 | ||
58eb9381 | 1681 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1682 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1683 | if (ret == 0) { |
1684 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1685 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1686 | } else { |
1687 | ERR("Relay didn't receive valid data_pending struct size : %d", | |
1688 | ret); | |
1689 | } | |
c8f59ee5 DG |
1690 | ret = -1; |
1691 | goto end_no_session; | |
1692 | } | |
1693 | ||
1694 | stream_id = be64toh(msg.stream_id); | |
1695 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1696 | ||
7591bab1 | 1697 | stream = stream_get_by_id(stream_id); |
de91f48a | 1698 | if (stream == NULL) { |
c8f59ee5 | 1699 | ret = -1; |
7591bab1 | 1700 | goto end; |
c8f59ee5 DG |
1701 | } |
1702 | ||
7591bab1 MD |
1703 | pthread_mutex_lock(&stream->lock); |
1704 | ||
6d805429 | 1705 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1706 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1707 | last_net_seq_num); | |
1708 | ||
33832e64 | 1709 | /* Avoid wrapping issue */ |
39df6d9f | 1710 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) >= 0) { |
6d805429 | 1711 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1712 | ret = 0; |
6d805429 DG |
1713 | } else { |
1714 | /* Data still being streamed thus pending */ | |
1715 | ret = 1; | |
c8f59ee5 DG |
1716 | } |
1717 | ||
7591bab1 MD |
1718 | stream->data_pending_check_done = true; |
1719 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 1720 | |
7591bab1 MD |
1721 | stream_put(stream); |
1722 | end: | |
c8f59ee5 | 1723 | |
53efb85a | 1724 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1725 | reply.ret_code = htobe32(ret); |
58eb9381 | 1726 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1727 | if (ret < 0) { |
6d805429 | 1728 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1729 | } |
1730 | ||
1731 | end_no_session: | |
1732 | return ret; | |
1733 | } | |
1734 | ||
1735 | /* | |
1736 | * Wait for the control socket to reach a quiescent state. | |
1737 | * | |
7591bab1 MD |
1738 | * Note that for now, when receiving this command from the session |
1739 | * daemon, this means that every subsequent commands or data received on | |
1740 | * the control socket has been handled. So, this is why we simply return | |
1741 | * OK here. | |
c8f59ee5 | 1742 | */ |
7591bab1 | 1743 | static int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1744 | struct relay_connection *conn) |
c8f59ee5 DG |
1745 | { |
1746 | int ret; | |
ad7051c0 DG |
1747 | uint64_t stream_id; |
1748 | struct relay_stream *stream; | |
ad7051c0 | 1749 | struct lttcomm_relayd_quiescent_control msg; |
c8f59ee5 DG |
1750 | struct lttcomm_relayd_generic_reply reply; |
1751 | ||
1752 | DBG("Checking quiescent state on control socket"); | |
1753 | ||
58eb9381 | 1754 | if (!conn->session || conn->version_check_done == 0) { |
ad7051c0 DG |
1755 | ERR("Trying to check for data before version check"); |
1756 | ret = -1; | |
1757 | goto end_no_session; | |
1758 | } | |
1759 | ||
58eb9381 | 1760 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
ad7051c0 | 1761 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1762 | if (ret == 0) { |
1763 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1764 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1765 | } else { |
1766 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1767 | ret); | |
1768 | } | |
ad7051c0 DG |
1769 | ret = -1; |
1770 | goto end_no_session; | |
1771 | } | |
1772 | ||
1773 | stream_id = be64toh(msg.stream_id); | |
7591bab1 MD |
1774 | stream = stream_get_by_id(stream_id); |
1775 | if (!stream) { | |
1776 | goto reply; | |
1777 | } | |
1778 | pthread_mutex_lock(&stream->lock); | |
1779 | stream->data_pending_check_done = true; | |
1780 | pthread_mutex_unlock(&stream->lock); | |
1781 | DBG("Relay quiescent control pending flag set to %" PRIu64, stream_id); | |
1782 | stream_put(stream); | |
1783 | reply: | |
53efb85a | 1784 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1785 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 1786 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1787 | if (ret < 0) { |
6d805429 | 1788 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1789 | } |
1790 | ||
ad7051c0 | 1791 | end_no_session: |
c8f59ee5 DG |
1792 | return ret; |
1793 | } | |
1794 | ||
f7079f67 | 1795 | /* |
7591bab1 MD |
1796 | * Initialize a data pending command. This means that a consumer is about |
1797 | * to ask for data pending for each stream it holds. Simply iterate over | |
1798 | * all streams of a session and set the data_pending_check_done flag. | |
f7079f67 DG |
1799 | * |
1800 | * This command returns to the client a LTTNG_OK code. | |
1801 | */ | |
7591bab1 | 1802 | static int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1803 | struct relay_connection *conn) |
f7079f67 DG |
1804 | { |
1805 | int ret; | |
1806 | struct lttng_ht_iter iter; | |
1807 | struct lttcomm_relayd_begin_data_pending msg; | |
1808 | struct lttcomm_relayd_generic_reply reply; | |
1809 | struct relay_stream *stream; | |
1810 | uint64_t session_id; | |
1811 | ||
1812 | assert(recv_hdr); | |
58eb9381 | 1813 | assert(conn); |
f7079f67 DG |
1814 | |
1815 | DBG("Init streams for data pending"); | |
1816 | ||
58eb9381 | 1817 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1818 | ERR("Trying to check for data before version check"); |
1819 | ret = -1; | |
1820 | goto end_no_session; | |
1821 | } | |
1822 | ||
58eb9381 | 1823 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1824 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1825 | if (ret == 0) { |
1826 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1827 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1828 | } else { |
1829 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1830 | ret); | |
1831 | } | |
f7079f67 DG |
1832 | ret = -1; |
1833 | goto end_no_session; | |
1834 | } | |
1835 | ||
1836 | session_id = be64toh(msg.session_id); | |
1837 | ||
1838 | /* | |
7591bab1 MD |
1839 | * Iterate over all streams to set the begin data pending flag. |
1840 | * For now, the streams are indexed by stream handle so we have | |
1841 | * to iterate over all streams to find the one associated with | |
1842 | * the right session_id. | |
f7079f67 DG |
1843 | */ |
1844 | rcu_read_lock(); | |
d3e2ba59 | 1845 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1846 | node.node) { |
7591bab1 MD |
1847 | if (!stream_get(stream)) { |
1848 | continue; | |
1849 | } | |
1850 | if (stream->trace->session->id == session_id) { | |
1851 | pthread_mutex_lock(&stream->lock); | |
1852 | stream->data_pending_check_done = false; | |
1853 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 DG |
1854 | DBG("Set begin data pending flag to stream %" PRIu64, |
1855 | stream->stream_handle); | |
1856 | } | |
7591bab1 | 1857 | stream_put(stream); |
f7079f67 DG |
1858 | } |
1859 | rcu_read_unlock(); | |
1860 | ||
53efb85a | 1861 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1862 | /* All good, send back reply. */ |
1863 | reply.ret_code = htobe32(LTTNG_OK); | |
1864 | ||
58eb9381 | 1865 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1866 | if (ret < 0) { |
1867 | ERR("Relay begin data pending send reply failed"); | |
1868 | } | |
1869 | ||
1870 | end_no_session: | |
1871 | return ret; | |
1872 | } | |
1873 | ||
1874 | /* | |
7591bab1 MD |
1875 | * End data pending command. This will check, for a given session id, if |
1876 | * each stream associated with it has its data_pending_check_done flag | |
1877 | * set. If not, this means that the client lost track of the stream but | |
1878 | * the data is still being streamed on our side. In this case, we inform | |
1879 | * the client that data is in flight. | |
f7079f67 DG |
1880 | * |
1881 | * Return to the client if there is data in flight or not with a ret_code. | |
1882 | */ | |
7591bab1 | 1883 | static int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1884 | struct relay_connection *conn) |
f7079f67 DG |
1885 | { |
1886 | int ret; | |
1887 | struct lttng_ht_iter iter; | |
1888 | struct lttcomm_relayd_end_data_pending msg; | |
1889 | struct lttcomm_relayd_generic_reply reply; | |
1890 | struct relay_stream *stream; | |
1891 | uint64_t session_id; | |
1892 | uint32_t is_data_inflight = 0; | |
1893 | ||
f7079f67 DG |
1894 | DBG("End data pending command"); |
1895 | ||
58eb9381 | 1896 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1897 | ERR("Trying to check for data before version check"); |
1898 | ret = -1; | |
1899 | goto end_no_session; | |
1900 | } | |
1901 | ||
58eb9381 | 1902 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1903 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1904 | if (ret == 0) { |
1905 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1906 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1907 | } else { |
1908 | ERR("Relay didn't receive valid end data_pending struct size: %d", | |
1909 | ret); | |
1910 | } | |
f7079f67 DG |
1911 | ret = -1; |
1912 | goto end_no_session; | |
1913 | } | |
1914 | ||
1915 | session_id = be64toh(msg.session_id); | |
1916 | ||
7591bab1 MD |
1917 | /* |
1918 | * Iterate over all streams to see if the begin data pending | |
1919 | * flag is set. | |
1920 | */ | |
f7079f67 | 1921 | rcu_read_lock(); |
d3e2ba59 | 1922 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1923 | node.node) { |
7591bab1 MD |
1924 | if (!stream_get(stream)) { |
1925 | continue; | |
1926 | } | |
1927 | if (stream->trace->session->id != session_id) { | |
1928 | stream_put(stream); | |
1929 | continue; | |
1930 | } | |
1931 | pthread_mutex_lock(&stream->lock); | |
1932 | if (!stream->data_pending_check_done) { | |
1933 | if (!stream->closed || !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
1934 | is_data_inflight = 1; | |
1935 | DBG("Data is still in flight for stream %" PRIu64, | |
1936 | stream->stream_handle); | |
1937 | pthread_mutex_unlock(&stream->lock); | |
1938 | stream_put(stream); | |
1939 | break; | |
1940 | } | |
f7079f67 | 1941 | } |
7591bab1 MD |
1942 | pthread_mutex_unlock(&stream->lock); |
1943 | stream_put(stream); | |
f7079f67 DG |
1944 | } |
1945 | rcu_read_unlock(); | |
1946 | ||
53efb85a | 1947 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1948 | /* All good, send back reply. */ |
1949 | reply.ret_code = htobe32(is_data_inflight); | |
1950 | ||
58eb9381 | 1951 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1952 | if (ret < 0) { |
1953 | ERR("Relay end data pending send reply failed"); | |
1954 | } | |
1955 | ||
1956 | end_no_session: | |
1957 | return ret; | |
1958 | } | |
1959 | ||
1c20f0e2 JD |
1960 | /* |
1961 | * Receive an index for a specific stream. | |
1962 | * | |
1963 | * Return 0 on success else a negative value. | |
1964 | */ | |
7591bab1 | 1965 | static int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1966 | struct relay_connection *conn) |
1c20f0e2 | 1967 | { |
7591bab1 | 1968 | int ret, send_ret; |
58eb9381 | 1969 | struct relay_session *session = conn->session; |
1c20f0e2 | 1970 | struct lttcomm_relayd_index index_info; |
7591bab1 | 1971 | struct relay_index *index; |
1c20f0e2 JD |
1972 | struct lttcomm_relayd_generic_reply reply; |
1973 | struct relay_stream *stream; | |
1974 | uint64_t net_seq_num; | |
f8f3885c | 1975 | size_t msg_len; |
1c20f0e2 | 1976 | |
58eb9381 | 1977 | assert(conn); |
1c20f0e2 JD |
1978 | |
1979 | DBG("Relay receiving index"); | |
1980 | ||
58eb9381 | 1981 | if (!session || conn->version_check_done == 0) { |
1c20f0e2 JD |
1982 | ERR("Trying to close a stream before version check"); |
1983 | ret = -1; | |
1984 | goto end_no_session; | |
1985 | } | |
1986 | ||
f8f3885c MD |
1987 | msg_len = lttcomm_relayd_index_len( |
1988 | lttng_to_index_major(conn->major, conn->minor), | |
1989 | lttng_to_index_minor(conn->major, conn->minor)); | |
58eb9381 | 1990 | ret = conn->sock->ops->recvmsg(conn->sock, &index_info, |
f8f3885c MD |
1991 | msg_len, 0); |
1992 | if (ret < msg_len) { | |
1c20f0e2 JD |
1993 | if (ret == 0) { |
1994 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1995 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
1c20f0e2 JD |
1996 | } else { |
1997 | ERR("Relay didn't receive valid index struct size : %d", ret); | |
1998 | } | |
1999 | ret = -1; | |
2000 | goto end_no_session; | |
2001 | } | |
2002 | ||
2003 | net_seq_num = be64toh(index_info.net_seq_num); | |
2004 | ||
7591bab1 | 2005 | stream = stream_get_by_id(be64toh(index_info.relay_stream_id)); |
1c20f0e2 | 2006 | if (!stream) { |
7591bab1 | 2007 | ERR("stream_get_by_id not found"); |
1c20f0e2 | 2008 | ret = -1; |
7591bab1 | 2009 | goto end; |
1c20f0e2 | 2010 | } |
7591bab1 | 2011 | pthread_mutex_lock(&stream->lock); |
1c20f0e2 | 2012 | |
d3e2ba59 JD |
2013 | /* Live beacon handling */ |
2014 | if (index_info.packet_size == 0) { | |
7591bab1 MD |
2015 | DBG("Received live beacon for stream %" PRIu64, |
2016 | stream->stream_handle); | |
d3e2ba59 JD |
2017 | |
2018 | /* | |
7591bab1 MD |
2019 | * Only flag a stream inactive when it has already |
2020 | * received data and no indexes are in flight. | |
d3e2ba59 | 2021 | */ |
a44ca2ca | 2022 | if (stream->index_received_seqcount > 0 |
7591bab1 MD |
2023 | && stream->indexes_in_flight == 0) { |
2024 | stream->beacon_ts_end = | |
2025 | be64toh(index_info.timestamp_end); | |
d3e2ba59 JD |
2026 | } |
2027 | ret = 0; | |
7591bab1 | 2028 | goto end_stream_put; |
d3e2ba59 JD |
2029 | } else { |
2030 | stream->beacon_ts_end = -1ULL; | |
2031 | } | |
2032 | ||
528f2ffa JD |
2033 | if (stream->ctf_stream_id == -1ULL) { |
2034 | stream->ctf_stream_id = be64toh(index_info.stream_id); | |
2035 | } | |
7591bab1 MD |
2036 | index = relay_index_get_by_id_or_create(stream, net_seq_num); |
2037 | if (!index) { | |
2038 | ret = -1; | |
2039 | ERR("relay_index_get_by_id_or_create index NULL"); | |
2040 | goto end_stream_put; | |
1c20f0e2 | 2041 | } |
234cd636 | 2042 | if (set_index_control_data(index, &index_info, conn)) { |
7591bab1 MD |
2043 | ERR("set_index_control_data error"); |
2044 | relay_index_put(index); | |
2045 | ret = -1; | |
2046 | goto end_stream_put; | |
2047 | } | |
2048 | ret = relay_index_try_flush(index); | |
2049 | if (ret == 0) { | |
a44ca2ca MD |
2050 | tracefile_array_commit_seq(stream->tfa); |
2051 | stream->index_received_seqcount++; | |
7591bab1 MD |
2052 | } else if (ret > 0) { |
2053 | /* no flush. */ | |
2054 | ret = 0; | |
2055 | } else { | |
2056 | ERR("relay_index_try_flush error %d", ret); | |
2057 | relay_index_put(index); | |
2058 | ret = -1; | |
1c20f0e2 JD |
2059 | } |
2060 | ||
7591bab1 MD |
2061 | end_stream_put: |
2062 | pthread_mutex_unlock(&stream->lock); | |
2063 | stream_put(stream); | |
2064 | ||
2065 | end: | |
1c20f0e2 | 2066 | |
53efb85a | 2067 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
2068 | if (ret < 0) { |
2069 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
2070 | } else { | |
2071 | reply.ret_code = htobe32(LTTNG_OK); | |
2072 | } | |
58eb9381 | 2073 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1c20f0e2 JD |
2074 | if (send_ret < 0) { |
2075 | ERR("Relay sending close index id reply"); | |
2076 | ret = send_ret; | |
2077 | } | |
2078 | ||
2079 | end_no_session: | |
2080 | return ret; | |
2081 | } | |
2082 | ||
a4baae1b JD |
2083 | /* |
2084 | * Receive the streams_sent message. | |
2085 | * | |
2086 | * Return 0 on success else a negative value. | |
2087 | */ | |
7591bab1 | 2088 | static int relay_streams_sent(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 2089 | struct relay_connection *conn) |
a4baae1b JD |
2090 | { |
2091 | int ret, send_ret; | |
2092 | struct lttcomm_relayd_generic_reply reply; | |
2093 | ||
58eb9381 | 2094 | assert(conn); |
a4baae1b JD |
2095 | |
2096 | DBG("Relay receiving streams_sent"); | |
2097 | ||
58eb9381 | 2098 | if (!conn->session || conn->version_check_done == 0) { |
a4baae1b JD |
2099 | ERR("Trying to close a stream before version check"); |
2100 | ret = -1; | |
2101 | goto end_no_session; | |
2102 | } | |
2103 | ||
2104 | /* | |
7591bab1 MD |
2105 | * Publish every pending stream in the connection recv list which are |
2106 | * now ready to be used by the viewer. | |
4a9daf17 | 2107 | */ |
7591bab1 | 2108 | publish_connection_local_streams(conn); |
4a9daf17 | 2109 | |
53efb85a | 2110 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2111 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2112 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
a4baae1b JD |
2113 | if (send_ret < 0) { |
2114 | ERR("Relay sending sent_stream reply"); | |
2115 | ret = send_ret; | |
2116 | } else { | |
2117 | /* Success. */ | |
2118 | ret = 0; | |
2119 | } | |
2120 | ||
2121 | end_no_session: | |
2122 | return ret; | |
2123 | } | |
2124 | ||
b8aa1682 | 2125 | /* |
d3e2ba59 | 2126 | * Process the commands received on the control socket |
b8aa1682 | 2127 | */ |
7591bab1 | 2128 | static int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 2129 | struct relay_connection *conn) |
b8aa1682 JD |
2130 | { |
2131 | int ret = 0; | |
2132 | ||
2133 | switch (be32toh(recv_hdr->cmd)) { | |
b8aa1682 | 2134 | case RELAYD_CREATE_SESSION: |
58eb9381 | 2135 | ret = relay_create_session(recv_hdr, conn); |
b8aa1682 | 2136 | break; |
b8aa1682 | 2137 | case RELAYD_ADD_STREAM: |
58eb9381 | 2138 | ret = relay_add_stream(recv_hdr, conn); |
b8aa1682 JD |
2139 | break; |
2140 | case RELAYD_START_DATA: | |
58eb9381 | 2141 | ret = relay_start(recv_hdr, conn); |
b8aa1682 JD |
2142 | break; |
2143 | case RELAYD_SEND_METADATA: | |
58eb9381 | 2144 | ret = relay_recv_metadata(recv_hdr, conn); |
b8aa1682 JD |
2145 | break; |
2146 | case RELAYD_VERSION: | |
58eb9381 | 2147 | ret = relay_send_version(recv_hdr, conn); |
b8aa1682 | 2148 | break; |
173af62f | 2149 | case RELAYD_CLOSE_STREAM: |
58eb9381 | 2150 | ret = relay_close_stream(recv_hdr, conn); |
173af62f | 2151 | break; |
6d805429 | 2152 | case RELAYD_DATA_PENDING: |
58eb9381 | 2153 | ret = relay_data_pending(recv_hdr, conn); |
c8f59ee5 DG |
2154 | break; |
2155 | case RELAYD_QUIESCENT_CONTROL: | |
58eb9381 | 2156 | ret = relay_quiescent_control(recv_hdr, conn); |
c8f59ee5 | 2157 | break; |
f7079f67 | 2158 | case RELAYD_BEGIN_DATA_PENDING: |
58eb9381 | 2159 | ret = relay_begin_data_pending(recv_hdr, conn); |
f7079f67 DG |
2160 | break; |
2161 | case RELAYD_END_DATA_PENDING: | |
58eb9381 | 2162 | ret = relay_end_data_pending(recv_hdr, conn); |
f7079f67 | 2163 | break; |
1c20f0e2 | 2164 | case RELAYD_SEND_INDEX: |
58eb9381 | 2165 | ret = relay_recv_index(recv_hdr, conn); |
1c20f0e2 | 2166 | break; |
a4baae1b | 2167 | case RELAYD_STREAMS_SENT: |
58eb9381 | 2168 | ret = relay_streams_sent(recv_hdr, conn); |
a4baae1b | 2169 | break; |
93ec662e JD |
2170 | case RELAYD_RESET_METADATA: |
2171 | ret = relay_reset_metadata(recv_hdr, conn); | |
2172 | break; | |
b8aa1682 JD |
2173 | case RELAYD_UPDATE_SYNC_INFO: |
2174 | default: | |
2175 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
58eb9381 | 2176 | relay_unknown_command(conn); |
b8aa1682 JD |
2177 | ret = -1; |
2178 | goto end; | |
2179 | } | |
2180 | ||
2181 | end: | |
2182 | return ret; | |
2183 | } | |
2184 | ||
7d2f7452 DG |
2185 | /* |
2186 | * Handle index for a data stream. | |
2187 | * | |
7591bab1 | 2188 | * Called with the stream lock held. |
7d2f7452 DG |
2189 | * |
2190 | * Return 0 on success else a negative value. | |
2191 | */ | |
2192 | static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num, | |
2193 | int rotate_index) | |
2194 | { | |
7591bab1 MD |
2195 | int ret = 0; |
2196 | uint64_t data_offset; | |
2197 | struct relay_index *index; | |
7d2f7452 | 2198 | |
7d2f7452 DG |
2199 | /* Get data offset because we are about to update the index. */ |
2200 | data_offset = htobe64(stream->tracefile_size_current); | |
2201 | ||
65d66b19 MD |
2202 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, |
2203 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
7591bab1 | 2204 | |
7d2f7452 | 2205 | /* |
7591bab1 MD |
2206 | * Lookup for an existing index for that stream id/sequence |
2207 | * number. If it exists, the control thread has already received the | |
2208 | * data for it, thus we need to write it to disk. | |
7d2f7452 | 2209 | */ |
7591bab1 | 2210 | index = relay_index_get_by_id_or_create(stream, net_seq_num); |
7d2f7452 | 2211 | if (!index) { |
7591bab1 MD |
2212 | ret = -1; |
2213 | goto end; | |
7d2f7452 DG |
2214 | } |
2215 | ||
f8f3885c MD |
2216 | if (rotate_index || !stream->index_file) { |
2217 | uint32_t major, minor; | |
7591bab1 | 2218 | |
f8f3885c MD |
2219 | /* Put ref on previous index_file. */ |
2220 | if (stream->index_file) { | |
2221 | lttng_index_file_put(stream->index_file); | |
2222 | stream->index_file = NULL; | |
7d2f7452 | 2223 | } |
f8f3885c MD |
2224 | major = stream->trace->session->major; |
2225 | minor = stream->trace->session->minor; | |
2226 | stream->index_file = lttng_index_file_create(stream->path_name, | |
2227 | stream->channel_name, | |
7591bab1 | 2228 | -1, -1, stream->tracefile_size, |
f8f3885c MD |
2229 | tracefile_array_get_file_index_head(stream->tfa), |
2230 | lttng_to_index_major(major, minor), | |
2231 | lttng_to_index_minor(major, minor)); | |
2232 | if (!stream->index_file) { | |
7591bab1 MD |
2233 | ret = -1; |
2234 | /* Put self-ref for this index due to error. */ | |
2235 | relay_index_put(index); | |
f8f3885c | 2236 | index = NULL; |
7591bab1 | 2237 | goto end; |
7d2f7452 | 2238 | } |
7d2f7452 DG |
2239 | } |
2240 | ||
f8f3885c | 2241 | if (relay_index_set_file(index, stream->index_file, data_offset)) { |
7591bab1 MD |
2242 | ret = -1; |
2243 | /* Put self-ref for this index due to error. */ | |
2244 | relay_index_put(index); | |
f8f3885c | 2245 | index = NULL; |
7591bab1 | 2246 | goto end; |
7d2f7452 DG |
2247 | } |
2248 | ||
7591bab1 MD |
2249 | ret = relay_index_try_flush(index); |
2250 | if (ret == 0) { | |
a44ca2ca MD |
2251 | tracefile_array_commit_seq(stream->tfa); |
2252 | stream->index_received_seqcount++; | |
7591bab1 MD |
2253 | } else if (ret > 0) { |
2254 | /* No flush. */ | |
2255 | ret = 0; | |
2256 | } else { | |
2257 | /* Put self-ref for this index due to error. */ | |
2258 | relay_index_put(index); | |
f8f3885c | 2259 | index = NULL; |
7591bab1 MD |
2260 | ret = -1; |
2261 | } | |
2262 | end: | |
7d2f7452 DG |
2263 | return ret; |
2264 | } | |
2265 | ||
b8aa1682 JD |
2266 | /* |
2267 | * relay_process_data: Process the data received on the data socket | |
2268 | */ | |
7591bab1 | 2269 | static int relay_process_data(struct relay_connection *conn) |
b8aa1682 | 2270 | { |
7d2f7452 | 2271 | int ret = 0, rotate_index = 0; |
6cd525e8 | 2272 | ssize_t size_ret; |
b8aa1682 JD |
2273 | struct relay_stream *stream; |
2274 | struct lttcomm_relayd_data_hdr data_hdr; | |
7d2f7452 | 2275 | uint64_t stream_id; |
173af62f | 2276 | uint64_t net_seq_num; |
b8aa1682 | 2277 | uint32_t data_size; |
2a174661 | 2278 | struct relay_session *session; |
bda7c7b9 | 2279 | bool new_stream = false, close_requested = false; |
0848dba7 MD |
2280 | size_t chunk_size = RECV_DATA_BUFFER_SIZE; |
2281 | size_t recv_off = 0; | |
2282 | char data_buffer[chunk_size]; | |
b8aa1682 | 2283 | |
58eb9381 | 2284 | ret = conn->sock->ops->recvmsg(conn->sock, &data_hdr, |
7c5aef62 | 2285 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 | 2286 | if (ret <= 0) { |
a6cd2b97 DG |
2287 | if (ret == 0) { |
2288 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2289 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 | 2290 | } else { |
58eb9381 | 2291 | ERR("Unable to receive data header on sock %d", conn->sock->fd); |
a6cd2b97 | 2292 | } |
b8aa1682 JD |
2293 | ret = -1; |
2294 | goto end; | |
2295 | } | |
2296 | ||
2297 | stream_id = be64toh(data_hdr.stream_id); | |
7591bab1 | 2298 | stream = stream_get_by_id(stream_id); |
b8aa1682 | 2299 | if (!stream) { |
65d66b19 | 2300 | ERR("relay_process_data: Cannot find stream %" PRIu64, stream_id); |
b8aa1682 | 2301 | ret = -1; |
7591bab1 | 2302 | goto end; |
b8aa1682 | 2303 | } |
7591bab1 | 2304 | session = stream->trace->session; |
b8aa1682 | 2305 | data_size = be32toh(data_hdr.data_size); |
b8aa1682 | 2306 | |
173af62f DG |
2307 | net_seq_num = be64toh(data_hdr.net_seq_num); |
2308 | ||
77c7c900 | 2309 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 2310 | data_size, stream_id, net_seq_num); |
b8aa1682 | 2311 | |
7591bab1 MD |
2312 | pthread_mutex_lock(&stream->lock); |
2313 | ||
1c20f0e2 | 2314 | /* Check if a rotation is needed. */ |
0f907de1 JD |
2315 | if (stream->tracefile_size > 0 && |
2316 | (stream->tracefile_size_current + data_size) > | |
2317 | stream->tracefile_size) { | |
a44ca2ca MD |
2318 | uint64_t old_id, new_id; |
2319 | ||
2320 | old_id = tracefile_array_get_file_index_head(stream->tfa); | |
2321 | tracefile_array_file_rotate(stream->tfa); | |
2322 | ||
2323 | /* new_id is updated by utils_rotate_stream_file. */ | |
2324 | new_id = old_id; | |
6b6b9a5a | 2325 | |
7591bab1 MD |
2326 | ret = utils_rotate_stream_file(stream->path_name, |
2327 | stream->channel_name, stream->tracefile_size, | |
2328 | stream->tracefile_count, -1, | |
2329 | -1, stream->stream_fd->fd, | |
a44ca2ca | 2330 | &new_id, &stream->stream_fd->fd); |
0f907de1 | 2331 | if (ret < 0) { |
1c20f0e2 | 2332 | ERR("Rotating stream output file"); |
7591bab1 MD |
2333 | goto end_stream_unlock; |
2334 | } | |
7591bab1 MD |
2335 | /* |
2336 | * Reset current size because we just performed a stream | |
2337 | * rotation. | |
2338 | */ | |
a6976990 | 2339 | stream->tracefile_size_current = 0; |
1c20f0e2 JD |
2340 | rotate_index = 1; |
2341 | } | |
2342 | ||
1c20f0e2 | 2343 | /* |
7591bab1 MD |
2344 | * Index are handled in protocol version 2.4 and above. Also, |
2345 | * snapshot and index are NOT supported. | |
1c20f0e2 | 2346 | */ |
2a174661 | 2347 | if (session->minor >= 4 && !session->snapshot) { |
7d2f7452 | 2348 | ret = handle_index_data(stream, net_seq_num, rotate_index); |
1c20f0e2 | 2349 | if (ret < 0) { |
65d66b19 MD |
2350 | ERR("handle_index_data: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
2351 | stream->stream_handle, net_seq_num, ret); | |
7591bab1 | 2352 | goto end_stream_unlock; |
1c20f0e2 | 2353 | } |
1c20f0e2 JD |
2354 | } |
2355 | ||
0848dba7 MD |
2356 | for (recv_off = 0; recv_off < data_size; recv_off += chunk_size) { |
2357 | size_t recv_size = min(data_size - recv_off, chunk_size); | |
1d4dfdef | 2358 | |
0848dba7 MD |
2359 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, recv_size, 0); |
2360 | if (ret <= 0) { | |
2361 | if (ret == 0) { | |
2362 | /* Orderly shutdown. Not necessary to print an error. */ | |
2363 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); | |
2364 | } else { | |
2365 | ERR("Socket %d error %d", conn->sock->fd, ret); | |
2366 | } | |
2367 | ret = -1; | |
2368 | goto end_stream_unlock; | |
2369 | } | |
2370 | ||
2371 | /* Write data to stream output fd. */ | |
2372 | size_ret = lttng_write(stream->stream_fd->fd, data_buffer, | |
2373 | recv_size); | |
2374 | if (size_ret < recv_size) { | |
2375 | ERR("Relay error writing data to file"); | |
2376 | ret = -1; | |
2377 | goto end_stream_unlock; | |
2378 | } | |
2379 | ||
2380 | DBG2("Relay wrote %zd bytes to tracefile for stream id %" PRIu64, | |
2381 | size_ret, stream->stream_handle); | |
2382 | } | |
5ab7344e | 2383 | |
7591bab1 MD |
2384 | ret = write_padding_to_file(stream->stream_fd->fd, |
2385 | be32toh(data_hdr.padding_size)); | |
1d4dfdef | 2386 | if (ret < 0) { |
65d66b19 MD |
2387 | ERR("write_padding_to_file: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
2388 | stream->stream_handle, net_seq_num, ret); | |
7591bab1 | 2389 | goto end_stream_unlock; |
1d4dfdef | 2390 | } |
7591bab1 MD |
2391 | stream->tracefile_size_current += |
2392 | data_size + be32toh(data_hdr.padding_size); | |
c0bae11d MD |
2393 | if (stream->prev_seq == -1ULL) { |
2394 | new_stream = true; | |
2395 | } | |
2396 | ||
173af62f DG |
2397 | stream->prev_seq = net_seq_num; |
2398 | ||
7591bab1 | 2399 | end_stream_unlock: |
bda7c7b9 | 2400 | close_requested = stream->close_requested; |
7591bab1 | 2401 | pthread_mutex_unlock(&stream->lock); |
bda7c7b9 JG |
2402 | if (close_requested) { |
2403 | try_stream_close(stream); | |
2404 | } | |
2405 | ||
c0bae11d MD |
2406 | if (new_stream) { |
2407 | pthread_mutex_lock(&session->lock); | |
2408 | uatomic_set(&session->new_streams, 1); | |
2409 | pthread_mutex_unlock(&session->lock); | |
2410 | } | |
7591bab1 | 2411 | stream_put(stream); |
b8aa1682 JD |
2412 | end: |
2413 | return ret; | |
2414 | } | |
2415 | ||
7591bab1 | 2416 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
2417 | { |
2418 | int ret; | |
2419 | ||
58eb9381 | 2420 | (void) lttng_poll_del(events, pollfd); |
b8aa1682 JD |
2421 | |
2422 | ret = close(pollfd); | |
2423 | if (ret < 0) { | |
2424 | ERR("Closing pollfd %d", pollfd); | |
2425 | } | |
2426 | } | |
2427 | ||
7591bab1 MD |
2428 | static void relay_thread_close_connection(struct lttng_poll_event *events, |
2429 | int pollfd, struct relay_connection *conn) | |
9d1bbf21 | 2430 | { |
7591bab1 | 2431 | const char *type_str; |
2a174661 | 2432 | |
7591bab1 MD |
2433 | switch (conn->type) { |
2434 | case RELAY_DATA: | |
2435 | type_str = "Data"; | |
2436 | break; | |
2437 | case RELAY_CONTROL: | |
2438 | type_str = "Control"; | |
2439 | break; | |
2440 | case RELAY_VIEWER_COMMAND: | |
2441 | type_str = "Viewer Command"; | |
2442 | break; | |
2443 | case RELAY_VIEWER_NOTIFICATION: | |
2444 | type_str = "Viewer Notification"; | |
2445 | break; | |
2446 | default: | |
2447 | type_str = "Unknown"; | |
9d1bbf21 | 2448 | } |
7591bab1 MD |
2449 | cleanup_connection_pollfd(events, pollfd); |
2450 | connection_put(conn); | |
2451 | DBG("%s connection closed with %d", type_str, pollfd); | |
b8aa1682 JD |
2452 | } |
2453 | ||
2454 | /* | |
2455 | * This thread does the actual work | |
2456 | */ | |
7591bab1 | 2457 | static void *relay_thread_worker(void *data) |
b8aa1682 | 2458 | { |
beaad64c DG |
2459 | int ret, err = -1, last_seen_data_fd = -1; |
2460 | uint32_t nb_fd; | |
b8aa1682 JD |
2461 | struct lttng_poll_event events; |
2462 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 2463 | struct lttng_ht_iter iter; |
b8aa1682 | 2464 | struct lttcomm_relayd_hdr recv_hdr; |
90e7d72f | 2465 | struct relay_connection *destroy_conn = NULL; |
b8aa1682 JD |
2466 | |
2467 | DBG("[thread] Relay worker started"); | |
2468 | ||
9d1bbf21 MD |
2469 | rcu_register_thread(); |
2470 | ||
55706a7d MD |
2471 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
2472 | ||
9b5e0863 MD |
2473 | if (testpoint(relayd_thread_worker)) { |
2474 | goto error_testpoint; | |
2475 | } | |
2476 | ||
f385ae0a MD |
2477 | health_code_update(); |
2478 | ||
b8aa1682 JD |
2479 | /* table of connections indexed on socket */ |
2480 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2481 | if (!relay_connections_ht) { |
2482 | goto relay_connections_ht_error; | |
2483 | } | |
b8aa1682 | 2484 | |
b8aa1682 JD |
2485 | ret = create_thread_poll_set(&events, 2); |
2486 | if (ret < 0) { | |
2487 | goto error_poll_create; | |
2488 | } | |
2489 | ||
58eb9381 | 2490 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
2491 | if (ret < 0) { |
2492 | goto error; | |
2493 | } | |
2494 | ||
beaad64c | 2495 | restart: |
b8aa1682 | 2496 | while (1) { |
beaad64c DG |
2497 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2498 | ||
f385ae0a MD |
2499 | health_code_update(); |
2500 | ||
b8aa1682 | 2501 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2502 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 2503 | health_poll_entry(); |
b8aa1682 | 2504 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 2505 | health_poll_exit(); |
b8aa1682 JD |
2506 | if (ret < 0) { |
2507 | /* | |
2508 | * Restart interrupted system call. | |
2509 | */ | |
2510 | if (errno == EINTR) { | |
2511 | goto restart; | |
2512 | } | |
2513 | goto error; | |
2514 | } | |
2515 | ||
0d9c5d77 DG |
2516 | nb_fd = ret; |
2517 | ||
beaad64c | 2518 | /* |
7591bab1 MD |
2519 | * Process control. The control connection is |
2520 | * prioritized so we don't starve it with high | |
2521 | * throughput tracing data on the data connection. | |
beaad64c | 2522 | */ |
b8aa1682 JD |
2523 | for (i = 0; i < nb_fd; i++) { |
2524 | /* Fetch once the poll data */ | |
beaad64c DG |
2525 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2526 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 2527 | |
f385ae0a MD |
2528 | health_code_update(); |
2529 | ||
fd20dac9 | 2530 | if (!revents) { |
7591bab1 MD |
2531 | /* |
2532 | * No activity for this FD (poll | |
2533 | * implementation). | |
2534 | */ | |
fd20dac9 MD |
2535 | continue; |
2536 | } | |
2537 | ||
b8aa1682 JD |
2538 | /* Thread quit pipe has been closed. Killing thread. */ |
2539 | ret = check_thread_quit_pipe(pollfd, revents); | |
2540 | if (ret) { | |
095a4ae5 MD |
2541 | err = 0; |
2542 | goto exit; | |
b8aa1682 JD |
2543 | } |
2544 | ||
58eb9381 DG |
2545 | /* Inspect the relay conn pipe for new connection */ |
2546 | if (pollfd == relay_conn_pipe[0]) { | |
03e43155 | 2547 | if (revents & LPOLLIN) { |
90e7d72f JG |
2548 | struct relay_connection *conn; |
2549 | ||
58eb9381 | 2550 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
2551 | if (ret < 0) { |
2552 | goto error; | |
2553 | } | |
58eb9381 DG |
2554 | lttng_poll_add(&events, conn->sock->fd, |
2555 | LPOLLIN | LPOLLRDHUP); | |
7591bab1 | 2556 | connection_ht_add(relay_connections_ht, conn); |
58eb9381 | 2557 | DBG("Connection socket %d added", conn->sock->fd); |
03e43155 MD |
2558 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2559 | ERR("Relay connection pipe error"); | |
2560 | goto error; | |
2561 | } else { | |
2562 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2563 | goto error; | |
b8aa1682 | 2564 | } |
58eb9381 | 2565 | } else { |
90e7d72f JG |
2566 | struct relay_connection *ctrl_conn; |
2567 | ||
7591bab1 | 2568 | ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
58eb9381 | 2569 | /* If not found, there is a synchronization issue. */ |
90e7d72f | 2570 | assert(ctrl_conn); |
58eb9381 | 2571 | |
03e43155 MD |
2572 | if (ctrl_conn->type == RELAY_DATA) { |
2573 | if (revents & LPOLLIN) { | |
beaad64c DG |
2574 | /* |
2575 | * Flag the last seen data fd not deleted. It will be | |
2576 | * used as the last seen fd if any fd gets deleted in | |
2577 | * this first loop. | |
2578 | */ | |
2579 | last_notdel_data_fd = pollfd; | |
2580 | } | |
03e43155 MD |
2581 | goto put_ctrl_connection; |
2582 | } | |
2583 | assert(ctrl_conn->type == RELAY_CONTROL); | |
2584 | ||
2585 | if (revents & LPOLLIN) { | |
2586 | ret = ctrl_conn->sock->ops->recvmsg(ctrl_conn->sock, | |
2587 | &recv_hdr, sizeof(recv_hdr), 0); | |
2588 | if (ret <= 0) { | |
2589 | /* Connection closed */ | |
2590 | relay_thread_close_connection(&events, pollfd, | |
2591 | ctrl_conn); | |
2592 | } else { | |
2593 | ret = relay_process_control(&recv_hdr, ctrl_conn); | |
2594 | if (ret < 0) { | |
2595 | /* Clear the session on error. */ | |
2596 | relay_thread_close_connection(&events, | |
2597 | pollfd, ctrl_conn); | |
2598 | } | |
2599 | seen_control = 1; | |
2600 | } | |
2601 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2602 | relay_thread_close_connection(&events, | |
2603 | pollfd, ctrl_conn); | |
2604 | if (last_seen_data_fd == pollfd) { | |
2605 | last_seen_data_fd = last_notdel_data_fd; | |
2606 | } | |
58eb9381 | 2607 | } else { |
03e43155 MD |
2608 | ERR("Unexpected poll events %u for control sock %d", |
2609 | revents, pollfd); | |
2610 | connection_put(ctrl_conn); | |
2611 | goto error; | |
beaad64c | 2612 | } |
03e43155 | 2613 | put_ctrl_connection: |
7591bab1 | 2614 | connection_put(ctrl_conn); |
beaad64c DG |
2615 | } |
2616 | } | |
2617 | ||
2618 | /* | |
2619 | * The last loop handled a control request, go back to poll to make | |
2620 | * sure we prioritise the control socket. | |
2621 | */ | |
2622 | if (seen_control) { | |
2623 | continue; | |
2624 | } | |
2625 | ||
2626 | if (last_seen_data_fd >= 0) { | |
2627 | for (i = 0; i < nb_fd; i++) { | |
2628 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
2629 | |
2630 | health_code_update(); | |
2631 | ||
beaad64c DG |
2632 | if (last_seen_data_fd == pollfd) { |
2633 | idx = i; | |
2634 | break; | |
2635 | } | |
2636 | } | |
2637 | } | |
2638 | ||
2639 | /* Process data connection. */ | |
2640 | for (i = idx + 1; i < nb_fd; i++) { | |
2641 | /* Fetch the poll data. */ | |
2642 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2643 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
90e7d72f | 2644 | struct relay_connection *data_conn; |
beaad64c | 2645 | |
f385ae0a MD |
2646 | health_code_update(); |
2647 | ||
fd20dac9 MD |
2648 | if (!revents) { |
2649 | /* No activity for this FD (poll implementation). */ | |
2650 | continue; | |
2651 | } | |
2652 | ||
beaad64c | 2653 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 2654 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
2655 | continue; |
2656 | } | |
2657 | ||
7591bab1 | 2658 | data_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
90e7d72f | 2659 | if (!data_conn) { |
fd20dac9 | 2660 | /* Skip it. Might be removed before. */ |
fd20dac9 MD |
2661 | continue; |
2662 | } | |
03e43155 MD |
2663 | if (data_conn->type == RELAY_CONTROL) { |
2664 | goto put_data_connection; | |
2665 | } | |
2666 | assert(data_conn->type == RELAY_DATA); | |
fd20dac9 MD |
2667 | |
2668 | if (revents & LPOLLIN) { | |
90e7d72f | 2669 | ret = relay_process_data(data_conn); |
fd20dac9 MD |
2670 | /* Connection closed */ |
2671 | if (ret < 0) { | |
7591bab1 | 2672 | relay_thread_close_connection(&events, pollfd, |
03e43155 | 2673 | data_conn); |
fd20dac9 MD |
2674 | /* |
2675 | * Every goto restart call sets the last seen fd where | |
2676 | * here we don't really care since we gracefully | |
2677 | * continue the loop after the connection is deleted. | |
2678 | */ | |
2679 | } else { | |
2680 | /* Keep last seen port. */ | |
2681 | last_seen_data_fd = pollfd; | |
7591bab1 | 2682 | connection_put(data_conn); |
fd20dac9 | 2683 | goto restart; |
b8aa1682 | 2684 | } |
03e43155 MD |
2685 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2686 | relay_thread_close_connection(&events, pollfd, | |
2687 | data_conn); | |
2688 | } else { | |
2689 | ERR("Unknown poll events %u for data sock %d", | |
2690 | revents, pollfd); | |
b8aa1682 | 2691 | } |
03e43155 | 2692 | put_data_connection: |
7591bab1 | 2693 | connection_put(data_conn); |
b8aa1682 | 2694 | } |
beaad64c | 2695 | last_seen_data_fd = -1; |
b8aa1682 JD |
2696 | } |
2697 | ||
f385ae0a MD |
2698 | /* Normal exit, no error */ |
2699 | ret = 0; | |
2700 | ||
095a4ae5 | 2701 | exit: |
b8aa1682 | 2702 | error: |
58eb9381 | 2703 | /* Cleanup reamaining connection object. */ |
9d1bbf21 | 2704 | rcu_read_lock(); |
90e7d72f JG |
2705 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, |
2706 | destroy_conn, | |
58eb9381 | 2707 | sock_n.node) { |
f385ae0a | 2708 | health_code_update(); |
98ba050e JR |
2709 | |
2710 | if (session_abort(destroy_conn->session)) { | |
2711 | assert(0); | |
2712 | } | |
2713 | ||
7591bab1 MD |
2714 | /* |
2715 | * No need to grab another ref, because we own | |
2716 | * destroy_conn. | |
2717 | */ | |
2718 | relay_thread_close_connection(&events, destroy_conn->sock->fd, | |
2719 | destroy_conn); | |
b8aa1682 | 2720 | } |
94d49140 | 2721 | rcu_read_unlock(); |
7591bab1 MD |
2722 | |
2723 | lttng_poll_clean(&events); | |
7d2f7452 | 2724 | error_poll_create: |
b8aa1682 | 2725 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 2726 | relay_connections_ht_error: |
58eb9381 DG |
2727 | /* Close relay conn pipes */ |
2728 | utils_close_pipe(relay_conn_pipe); | |
095a4ae5 MD |
2729 | if (err) { |
2730 | DBG("Thread exited with error"); | |
2731 | } | |
b8aa1682 | 2732 | DBG("Worker thread cleanup complete"); |
9b5e0863 | 2733 | error_testpoint: |
f385ae0a MD |
2734 | if (err) { |
2735 | health_error(); | |
2736 | ERR("Health error occurred in %s", __func__); | |
2737 | } | |
2738 | health_unregister(health_relayd); | |
9d1bbf21 | 2739 | rcu_unregister_thread(); |
b4aacfdc | 2740 | lttng_relay_stop_threads(); |
b8aa1682 JD |
2741 | return NULL; |
2742 | } | |
2743 | ||
2744 | /* | |
2745 | * Create the relay command pipe to wake thread_manage_apps. | |
2746 | * Closed in cleanup(). | |
2747 | */ | |
58eb9381 | 2748 | static int create_relay_conn_pipe(void) |
b8aa1682 | 2749 | { |
a02de639 | 2750 | int ret; |
b8aa1682 | 2751 | |
58eb9381 | 2752 | ret = utils_create_pipe_cloexec(relay_conn_pipe); |
b8aa1682 | 2753 | |
b8aa1682 JD |
2754 | return ret; |
2755 | } | |
2756 | ||
2757 | /* | |
2758 | * main | |
2759 | */ | |
2760 | int main(int argc, char **argv) | |
2761 | { | |
178a0557 | 2762 | int ret = 0, retval = 0; |
b8aa1682 JD |
2763 | void *status; |
2764 | ||
b8aa1682 JD |
2765 | /* Parse arguments */ |
2766 | progname = argv[0]; | |
178a0557 MD |
2767 | if (set_options(argc, argv)) { |
2768 | retval = -1; | |
2769 | goto exit_options; | |
b8aa1682 JD |
2770 | } |
2771 | ||
178a0557 MD |
2772 | if (set_signal_handler()) { |
2773 | retval = -1; | |
2774 | goto exit_options; | |
b8aa1682 JD |
2775 | } |
2776 | ||
4d513a50 DG |
2777 | /* Try to create directory if -o, --output is specified. */ |
2778 | if (opt_output_path) { | |
994fa64f DG |
2779 | if (*opt_output_path != '/') { |
2780 | ERR("Please specify an absolute path for -o, --output PATH"); | |
178a0557 MD |
2781 | retval = -1; |
2782 | goto exit_options; | |
994fa64f DG |
2783 | } |
2784 | ||
d77dded2 JG |
2785 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG, |
2786 | -1, -1); | |
4d513a50 DG |
2787 | if (ret < 0) { |
2788 | ERR("Unable to create %s", opt_output_path); | |
178a0557 MD |
2789 | retval = -1; |
2790 | goto exit_options; | |
4d513a50 DG |
2791 | } |
2792 | } | |
2793 | ||
b8aa1682 | 2794 | /* Daemonize */ |
b5218ffb | 2795 | if (opt_daemon || opt_background) { |
3fd27398 MD |
2796 | int i; |
2797 | ||
2798 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, | |
2799 | !opt_background); | |
b8aa1682 | 2800 | if (ret < 0) { |
178a0557 MD |
2801 | retval = -1; |
2802 | goto exit_options; | |
b8aa1682 | 2803 | } |
3fd27398 MD |
2804 | |
2805 | /* | |
2806 | * We are in the child. Make sure all other file | |
2807 | * descriptors are closed, in case we are called with | |
2808 | * more opened file descriptors than the standard ones. | |
2809 | */ | |
2810 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
2811 | (void) close(i); | |
2812 | } | |
2813 | } | |
2814 | ||
178a0557 MD |
2815 | /* Initialize thread health monitoring */ |
2816 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
2817 | if (!health_relayd) { | |
2818 | PERROR("health_app_create error"); | |
2819 | retval = -1; | |
2820 | goto exit_health_app_create; | |
2821 | } | |
2822 | ||
3fd27398 | 2823 | /* Create thread quit pipe */ |
178a0557 MD |
2824 | if (init_thread_quit_pipe()) { |
2825 | retval = -1; | |
2826 | goto exit_init_data; | |
b8aa1682 JD |
2827 | } |
2828 | ||
b8aa1682 | 2829 | /* Setup the thread apps communication pipe. */ |
178a0557 MD |
2830 | if (create_relay_conn_pipe()) { |
2831 | retval = -1; | |
2832 | goto exit_init_data; | |
b8aa1682 JD |
2833 | } |
2834 | ||
2835 | /* Init relay command queue. */ | |
8bdee6e2 | 2836 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 | 2837 | |
554831e7 MD |
2838 | /* Initialize communication library */ |
2839 | lttcomm_init(); | |
87e45c13 | 2840 | lttcomm_inet_init(); |
554831e7 | 2841 | |
d3e2ba59 | 2842 | /* tables of sessions indexed by session ID */ |
7591bab1 MD |
2843 | sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2844 | if (!sessions_ht) { | |
178a0557 MD |
2845 | retval = -1; |
2846 | goto exit_init_data; | |
d3e2ba59 JD |
2847 | } |
2848 | ||
2849 | /* tables of streams indexed by stream ID */ | |
2a174661 | 2850 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 | 2851 | if (!relay_streams_ht) { |
178a0557 MD |
2852 | retval = -1; |
2853 | goto exit_init_data; | |
d3e2ba59 JD |
2854 | } |
2855 | ||
2856 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
2857 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2858 | if (!viewer_streams_ht) { | |
178a0557 MD |
2859 | retval = -1; |
2860 | goto exit_init_data; | |
55706a7d MD |
2861 | } |
2862 | ||
65931c8b | 2863 | ret = utils_create_pipe(health_quit_pipe); |
178a0557 MD |
2864 | if (ret) { |
2865 | retval = -1; | |
2866 | goto exit_health_quit_pipe; | |
65931c8b MD |
2867 | } |
2868 | ||
2869 | /* Create thread to manage the client socket */ | |
1a1a34b4 | 2870 | ret = pthread_create(&health_thread, default_pthread_attr(), |
65931c8b | 2871 | thread_manage_health, (void *) NULL); |
178a0557 MD |
2872 | if (ret) { |
2873 | errno = ret; | |
65931c8b | 2874 | PERROR("pthread_create health"); |
178a0557 MD |
2875 | retval = -1; |
2876 | goto exit_health_thread; | |
65931c8b MD |
2877 | } |
2878 | ||
b8aa1682 | 2879 | /* Setup the dispatcher thread */ |
1a1a34b4 | 2880 | ret = pthread_create(&dispatcher_thread, default_pthread_attr(), |
b8aa1682 | 2881 | relay_thread_dispatcher, (void *) NULL); |
178a0557 MD |
2882 | if (ret) { |
2883 | errno = ret; | |
b8aa1682 | 2884 | PERROR("pthread_create dispatcher"); |
178a0557 MD |
2885 | retval = -1; |
2886 | goto exit_dispatcher_thread; | |
b8aa1682 JD |
2887 | } |
2888 | ||
2889 | /* Setup the worker thread */ | |
1a1a34b4 | 2890 | ret = pthread_create(&worker_thread, default_pthread_attr(), |
7591bab1 | 2891 | relay_thread_worker, NULL); |
178a0557 MD |
2892 | if (ret) { |
2893 | errno = ret; | |
b8aa1682 | 2894 | PERROR("pthread_create worker"); |
178a0557 MD |
2895 | retval = -1; |
2896 | goto exit_worker_thread; | |
b8aa1682 JD |
2897 | } |
2898 | ||
2899 | /* Setup the listener thread */ | |
1a1a34b4 | 2900 | ret = pthread_create(&listener_thread, default_pthread_attr(), |
b8aa1682 | 2901 | relay_thread_listener, (void *) NULL); |
178a0557 MD |
2902 | if (ret) { |
2903 | errno = ret; | |
b8aa1682 | 2904 | PERROR("pthread_create listener"); |
178a0557 MD |
2905 | retval = -1; |
2906 | goto exit_listener_thread; | |
b8aa1682 JD |
2907 | } |
2908 | ||
7591bab1 | 2909 | ret = relayd_live_create(live_uri); |
178a0557 | 2910 | if (ret) { |
d3e2ba59 | 2911 | ERR("Starting live viewer threads"); |
178a0557 | 2912 | retval = -1; |
50138f51 | 2913 | goto exit_live; |
d3e2ba59 JD |
2914 | } |
2915 | ||
178a0557 MD |
2916 | /* |
2917 | * This is where we start awaiting program completion (e.g. through | |
2918 | * signal that asks threads to teardown). | |
2919 | */ | |
2920 | ||
2921 | ret = relayd_live_join(); | |
2922 | if (ret) { | |
2923 | retval = -1; | |
2924 | } | |
50138f51 | 2925 | exit_live: |
178a0557 | 2926 | |
b8aa1682 | 2927 | ret = pthread_join(listener_thread, &status); |
178a0557 MD |
2928 | if (ret) { |
2929 | errno = ret; | |
2930 | PERROR("pthread_join listener_thread"); | |
2931 | retval = -1; | |
b8aa1682 JD |
2932 | } |
2933 | ||
178a0557 | 2934 | exit_listener_thread: |
b8aa1682 | 2935 | ret = pthread_join(worker_thread, &status); |
178a0557 MD |
2936 | if (ret) { |
2937 | errno = ret; | |
2938 | PERROR("pthread_join worker_thread"); | |
2939 | retval = -1; | |
b8aa1682 JD |
2940 | } |
2941 | ||
178a0557 | 2942 | exit_worker_thread: |
b8aa1682 | 2943 | ret = pthread_join(dispatcher_thread, &status); |
178a0557 MD |
2944 | if (ret) { |
2945 | errno = ret; | |
2946 | PERROR("pthread_join dispatcher_thread"); | |
2947 | retval = -1; | |
b8aa1682 | 2948 | } |
178a0557 | 2949 | exit_dispatcher_thread: |
42415026 | 2950 | |
65931c8b | 2951 | ret = pthread_join(health_thread, &status); |
178a0557 MD |
2952 | if (ret) { |
2953 | errno = ret; | |
2954 | PERROR("pthread_join health_thread"); | |
2955 | retval = -1; | |
65931c8b | 2956 | } |
178a0557 | 2957 | exit_health_thread: |
65931c8b | 2958 | |
65931c8b | 2959 | utils_close_pipe(health_quit_pipe); |
178a0557 | 2960 | exit_health_quit_pipe: |
65931c8b | 2961 | |
178a0557 | 2962 | exit_init_data: |
55706a7d | 2963 | health_app_destroy(health_relayd); |
55706a7d | 2964 | exit_health_app_create: |
178a0557 | 2965 | exit_options: |
4d62fbf8 MD |
2966 | /* |
2967 | * Wait for all pending call_rcu work to complete before tearing | |
2968 | * down data structures. call_rcu worker may be trying to | |
2969 | * perform lookups in those structures. | |
2970 | */ | |
2971 | rcu_barrier(); | |
7591bab1 MD |
2972 | relayd_cleanup(); |
2973 | ||
2974 | /* Ensure all prior call_rcu are done. */ | |
2975 | rcu_barrier(); | |
d3e2ba59 | 2976 | |
178a0557 | 2977 | if (!retval) { |
b8aa1682 | 2978 | exit(EXIT_SUCCESS); |
178a0557 MD |
2979 | } else { |
2980 | exit(EXIT_FAILURE); | |
b8aa1682 | 2981 | } |
b8aa1682 | 2982 | } |