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" |
8af38ec0 | 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; |
f5a36bab | 86 | static int opt_allow_clear = 1; |
3fd27398 MD |
87 | |
88 | /* | |
89 | * We need to wait for listener and live listener threads, as well as | |
90 | * health check thread, before being ready to signal readiness. | |
91 | */ | |
92 | #define NR_LTTNG_RELAY_READY 3 | |
93 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
0848dba7 MD |
94 | |
95 | /* Size of receive buffer. */ | |
96 | #define RECV_DATA_BUFFER_SIZE 65536 | |
97 | ||
3fd27398 MD |
98 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ |
99 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
100 | ||
095a4ae5 MD |
101 | static struct lttng_uri *control_uri; |
102 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 103 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
104 | |
105 | const char *progname; | |
b8aa1682 | 106 | |
65931c8b | 107 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
108 | static int tracing_group_name_override; |
109 | ||
110 | const char * const config_section_name = "relayd"; | |
65931c8b | 111 | |
b8aa1682 JD |
112 | /* |
113 | * Quit pipe for all threads. This permits a single cancellation point | |
114 | * for all threads when receiving an event on the pipe. | |
115 | */ | |
0b242f62 | 116 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
117 | |
118 | /* | |
119 | * This pipe is used to inform the worker thread that a command is queued and | |
120 | * ready to be processed. | |
121 | */ | |
58eb9381 | 122 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 123 | |
26c9d55e | 124 | /* Shared between threads */ |
b8aa1682 JD |
125 | static int dispatch_thread_exit; |
126 | ||
127 | static pthread_t listener_thread; | |
128 | static pthread_t dispatcher_thread; | |
129 | static pthread_t worker_thread; | |
65931c8b | 130 | static pthread_t health_thread; |
b8aa1682 | 131 | |
7591bab1 MD |
132 | /* |
133 | * last_relay_stream_id_lock protects last_relay_stream_id increment | |
134 | * atomicity on 32-bit architectures. | |
135 | */ | |
136 | static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER; | |
095a4ae5 | 137 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
138 | |
139 | /* | |
140 | * Relay command queue. | |
141 | * | |
142 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
143 | * queue. | |
144 | */ | |
58eb9381 | 145 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 JD |
146 | |
147 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
148 | static char *data_buffer; |
149 | static unsigned int data_buffer_size; | |
b8aa1682 | 150 | |
d3e2ba59 JD |
151 | /* Global relay stream hash table. */ |
152 | struct lttng_ht *relay_streams_ht; | |
153 | ||
92c6ca54 DG |
154 | /* Global relay viewer stream hash table. */ |
155 | struct lttng_ht *viewer_streams_ht; | |
156 | ||
7591bab1 MD |
157 | /* Global relay sessions hash table. */ |
158 | struct lttng_ht *sessions_ht; | |
0a6518b0 | 159 | |
55706a7d | 160 | /* Relayd health monitoring */ |
eea7556c | 161 | struct health_app *health_relayd; |
55706a7d | 162 | |
cd60b05a JG |
163 | static struct option long_options[] = { |
164 | { "control-port", 1, 0, 'C', }, | |
165 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 166 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 167 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 168 | { "background", 0, 0, 'b', }, |
cd60b05a JG |
169 | { "group", 1, 0, 'g', }, |
170 | { "help", 0, 0, 'h', }, | |
171 | { "output", 1, 0, 'o', }, | |
172 | { "verbose", 0, 0, 'v', }, | |
173 | { "config", 1, 0, 'f' }, | |
3a904098 | 174 | { "version", 0, 0, 'V' }, |
f5a36bab | 175 | { "disallow-clear", 0, 0, 'x' }, |
cd60b05a JG |
176 | { NULL, 0, 0, 0, }, |
177 | }; | |
178 | ||
3a904098 | 179 | static const char *config_ignore_options[] = { "help", "config", "version" }; |
cd60b05a | 180 | |
cd60b05a JG |
181 | /* |
182 | * Take an option from the getopt output and set it in the right variable to be | |
183 | * used later. | |
184 | * | |
185 | * Return 0 on success else a negative value. | |
186 | */ | |
7591bab1 | 187 | static int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 188 | { |
cd60b05a JG |
189 | int ret; |
190 | ||
191 | switch (opt) { | |
192 | case 0: | |
193 | fprintf(stderr, "option %s", optname); | |
194 | if (arg) { | |
195 | fprintf(stderr, " with arg %s\n", arg); | |
196 | } | |
197 | break; | |
198 | case 'C': | |
e8fa9fb0 MD |
199 | if (lttng_is_setuid_setgid()) { |
200 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
201 | "-C, --control-port"); | |
202 | } else { | |
203 | ret = uri_parse(arg, &control_uri); | |
204 | if (ret < 0) { | |
205 | ERR("Invalid control URI specified"); | |
206 | goto end; | |
207 | } | |
208 | if (control_uri->port == 0) { | |
209 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
210 | } | |
cd60b05a JG |
211 | } |
212 | break; | |
213 | case 'D': | |
e8fa9fb0 MD |
214 | if (lttng_is_setuid_setgid()) { |
215 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
216 | "-D, -data-port"); | |
217 | } else { | |
218 | ret = uri_parse(arg, &data_uri); | |
219 | if (ret < 0) { | |
220 | ERR("Invalid data URI specified"); | |
221 | goto end; | |
222 | } | |
223 | if (data_uri->port == 0) { | |
224 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
225 | } | |
cd60b05a JG |
226 | } |
227 | break; | |
8d5c808e | 228 | case 'L': |
e8fa9fb0 MD |
229 | if (lttng_is_setuid_setgid()) { |
230 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
231 | "-L, -live-port"); | |
232 | } else { | |
233 | ret = uri_parse(arg, &live_uri); | |
234 | if (ret < 0) { | |
235 | ERR("Invalid live URI specified"); | |
236 | goto end; | |
237 | } | |
238 | if (live_uri->port == 0) { | |
239 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
240 | } | |
8d5c808e AM |
241 | } |
242 | break; | |
cd60b05a JG |
243 | case 'd': |
244 | opt_daemon = 1; | |
245 | break; | |
b5218ffb MD |
246 | case 'b': |
247 | opt_background = 1; | |
248 | break; | |
cd60b05a | 249 | case 'g': |
e8fa9fb0 MD |
250 | if (lttng_is_setuid_setgid()) { |
251 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
252 | "-g, --group"); | |
253 | } else { | |
254 | tracing_group_name = strdup(arg); | |
255 | if (tracing_group_name == NULL) { | |
256 | ret = -errno; | |
257 | PERROR("strdup"); | |
258 | goto end; | |
259 | } | |
260 | tracing_group_name_override = 1; | |
330a40bb | 261 | } |
cd60b05a JG |
262 | break; |
263 | case 'h': | |
4fc83d94 | 264 | ret = utils_show_help(8, "lttng-relayd", help_msg); |
655b5cc1 | 265 | if (ret) { |
4fc83d94 | 266 | ERR("Cannot show --help for `lttng-relayd`"); |
655b5cc1 PP |
267 | perror("exec"); |
268 | } | |
cd60b05a | 269 | exit(EXIT_FAILURE); |
3a904098 AW |
270 | case 'V': |
271 | fprintf(stdout, "%s\n", VERSION); | |
272 | exit(EXIT_SUCCESS); | |
cd60b05a | 273 | case 'o': |
e8fa9fb0 MD |
274 | if (lttng_is_setuid_setgid()) { |
275 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
276 | "-o, --output"); | |
277 | } else { | |
278 | ret = asprintf(&opt_output_path, "%s", arg); | |
279 | if (ret < 0) { | |
280 | ret = -errno; | |
281 | PERROR("asprintf opt_output_path"); | |
282 | goto end; | |
283 | } | |
cd60b05a JG |
284 | } |
285 | break; | |
286 | case 'v': | |
287 | /* Verbose level can increase using multiple -v */ | |
288 | if (arg) { | |
289 | lttng_opt_verbose = config_parse_value(arg); | |
290 | } else { | |
849e5b7b DG |
291 | /* Only 3 level of verbosity (-vvv). */ |
292 | if (lttng_opt_verbose < 3) { | |
293 | lttng_opt_verbose += 1; | |
294 | } | |
cd60b05a JG |
295 | } |
296 | break; | |
f5a36bab JR |
297 | case 'x': |
298 | /* Disallow clear */ | |
299 | opt_allow_clear = 0; | |
300 | break; | |
cd60b05a JG |
301 | default: |
302 | /* Unknown option or other error. | |
303 | * Error is printed by getopt, just return */ | |
304 | ret = -1; | |
305 | goto end; | |
306 | } | |
307 | ||
308 | /* All good. */ | |
309 | ret = 0; | |
310 | ||
311 | end: | |
312 | return ret; | |
313 | } | |
314 | ||
315 | /* | |
316 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 317 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
cd60b05a JG |
318 | * return value conventions. |
319 | */ | |
7591bab1 | 320 | static int config_entry_handler(const struct config_entry *entry, void *unused) |
cd60b05a JG |
321 | { |
322 | int ret = 0, i; | |
323 | ||
324 | if (!entry || !entry->name || !entry->value) { | |
325 | ret = -EINVAL; | |
326 | goto end; | |
327 | } | |
328 | ||
329 | /* Check if the option is to be ignored */ | |
330 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
331 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
332 | goto end; | |
333 | } | |
334 | } | |
335 | ||
336 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
337 | /* Ignore if entry name is not fully matched. */ | |
338 | if (strcmp(entry->name, long_options[i].name)) { | |
339 | continue; | |
340 | } | |
341 | ||
342 | /* | |
7591bab1 MD |
343 | * If the option takes no argument on the command line, |
344 | * we have to check if the value is "true". We support | |
345 | * non-zero numeric values, true, on and yes. | |
cd60b05a JG |
346 | */ |
347 | if (!long_options[i].has_arg) { | |
348 | ret = config_parse_value(entry->value); | |
349 | if (ret <= 0) { | |
350 | if (ret) { | |
351 | WARN("Invalid configuration value \"%s\" for option %s", | |
352 | entry->value, entry->name); | |
353 | } | |
354 | /* False, skip boolean config option. */ | |
355 | goto end; | |
356 | } | |
357 | } | |
358 | ||
359 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
360 | goto end; | |
361 | } | |
362 | ||
363 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
364 | entry->name); | |
365 | ||
366 | end: | |
367 | return ret; | |
368 | } | |
369 | ||
7591bab1 | 370 | static int set_options(int argc, char **argv) |
cd60b05a | 371 | { |
178a0557 | 372 | int c, ret = 0, option_index = 0, retval = 0; |
cd60b05a JG |
373 | int orig_optopt = optopt, orig_optind = optind; |
374 | char *default_address, *optstring; | |
375 | const char *config_path = NULL; | |
f5a36bab | 376 | const char *value = NULL; |
cd60b05a JG |
377 | |
378 | optstring = utils_generate_optstring(long_options, | |
379 | sizeof(long_options) / sizeof(struct option)); | |
380 | if (!optstring) { | |
178a0557 | 381 | retval = -ENOMEM; |
cd60b05a JG |
382 | goto exit; |
383 | } | |
384 | ||
385 | /* Check for the --config option */ | |
386 | ||
387 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
388 | &option_index)) != -1) { | |
389 | if (c == '?') { | |
178a0557 | 390 | retval = -EINVAL; |
cd60b05a JG |
391 | goto exit; |
392 | } else if (c != 'f') { | |
393 | continue; | |
394 | } | |
395 | ||
e8fa9fb0 MD |
396 | if (lttng_is_setuid_setgid()) { |
397 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
398 | "-f, --config"); | |
399 | } else { | |
400 | config_path = utils_expand_path(optarg); | |
401 | if (!config_path) { | |
402 | ERR("Failed to resolve path: %s", optarg); | |
403 | } | |
cd60b05a JG |
404 | } |
405 | } | |
406 | ||
407 | ret = config_get_section_entries(config_path, config_section_name, | |
408 | config_entry_handler, NULL); | |
409 | if (ret) { | |
410 | if (ret > 0) { | |
411 | ERR("Invalid configuration option at line %i", ret); | |
cd60b05a | 412 | } |
178a0557 | 413 | retval = -1; |
cd60b05a JG |
414 | goto exit; |
415 | } | |
b8aa1682 | 416 | |
cd60b05a JG |
417 | /* Reset getopt's global state */ |
418 | optopt = orig_optopt; | |
419 | optind = orig_optind; | |
b8aa1682 | 420 | while (1) { |
cd60b05a | 421 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
422 | if (c == -1) { |
423 | break; | |
424 | } | |
425 | ||
cd60b05a JG |
426 | ret = set_option(c, optarg, long_options[option_index].name); |
427 | if (ret < 0) { | |
178a0557 | 428 | retval = -1; |
b8aa1682 JD |
429 | goto exit; |
430 | } | |
431 | } | |
432 | ||
433 | /* assign default values */ | |
434 | if (control_uri == NULL) { | |
fa91dc52 MD |
435 | ret = asprintf(&default_address, |
436 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
437 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
438 | if (ret < 0) { |
439 | PERROR("asprintf default data address"); | |
178a0557 | 440 | retval = -1; |
b8aa1682 JD |
441 | goto exit; |
442 | } | |
443 | ||
444 | ret = uri_parse(default_address, &control_uri); | |
445 | free(default_address); | |
446 | if (ret < 0) { | |
447 | ERR("Invalid control URI specified"); | |
178a0557 | 448 | retval = -1; |
b8aa1682 JD |
449 | goto exit; |
450 | } | |
451 | } | |
452 | if (data_uri == NULL) { | |
fa91dc52 MD |
453 | ret = asprintf(&default_address, |
454 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
455 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
456 | if (ret < 0) { |
457 | PERROR("asprintf default data address"); | |
178a0557 | 458 | retval = -1; |
b8aa1682 JD |
459 | goto exit; |
460 | } | |
461 | ||
462 | ret = uri_parse(default_address, &data_uri); | |
463 | free(default_address); | |
464 | if (ret < 0) { | |
465 | ERR("Invalid data URI specified"); | |
178a0557 | 466 | retval = -1; |
b8aa1682 JD |
467 | goto exit; |
468 | } | |
469 | } | |
d3e2ba59 | 470 | if (live_uri == NULL) { |
fa91dc52 MD |
471 | ret = asprintf(&default_address, |
472 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
473 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
474 | if (ret < 0) { |
475 | PERROR("asprintf default viewer control address"); | |
178a0557 | 476 | retval = -1; |
d3e2ba59 JD |
477 | goto exit; |
478 | } | |
479 | ||
480 | ret = uri_parse(default_address, &live_uri); | |
481 | free(default_address); | |
482 | if (ret < 0) { | |
483 | ERR("Invalid viewer control URI specified"); | |
178a0557 | 484 | retval = -1; |
d3e2ba59 JD |
485 | goto exit; |
486 | } | |
487 | } | |
b8aa1682 | 488 | |
f5a36bab JR |
489 | if (opt_allow_clear) { |
490 | /* Check if env variable exists. */ | |
491 | value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV); | |
492 | if (value) { | |
493 | ret = config_parse_value(value); | |
494 | if (ret < 0) { | |
495 | ERR("Invalid value for %s specified", DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV); | |
496 | retval = -1; | |
497 | goto exit; | |
498 | } | |
499 | opt_allow_clear = !ret; | |
500 | } | |
501 | } | |
502 | ||
b8aa1682 | 503 | exit: |
cd60b05a | 504 | free(optstring); |
178a0557 | 505 | return retval; |
b8aa1682 JD |
506 | } |
507 | ||
7591bab1 MD |
508 | static void print_global_objects(void) |
509 | { | |
510 | rcu_register_thread(); | |
511 | ||
512 | print_viewer_streams(); | |
513 | print_relay_streams(); | |
514 | print_sessions(); | |
515 | ||
516 | rcu_unregister_thread(); | |
517 | } | |
518 | ||
b8aa1682 JD |
519 | /* |
520 | * Cleanup the daemon | |
521 | */ | |
7591bab1 | 522 | static void relayd_cleanup(void) |
b8aa1682 | 523 | { |
7591bab1 MD |
524 | print_global_objects(); |
525 | ||
b8aa1682 JD |
526 | DBG("Cleaning up"); |
527 | ||
178a0557 MD |
528 | if (viewer_streams_ht) |
529 | lttng_ht_destroy(viewer_streams_ht); | |
530 | if (relay_streams_ht) | |
531 | lttng_ht_destroy(relay_streams_ht); | |
7591bab1 MD |
532 | if (sessions_ht) |
533 | lttng_ht_destroy(sessions_ht); | |
178a0557 | 534 | |
095a4ae5 MD |
535 | /* free the dynamically allocated opt_output_path */ |
536 | free(opt_output_path); | |
537 | ||
a02de639 CB |
538 | /* Close thread quit pipes */ |
539 | utils_close_pipe(thread_quit_pipe); | |
540 | ||
710c1f73 DG |
541 | uri_free(control_uri); |
542 | uri_free(data_uri); | |
8d5c808e | 543 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
544 | |
545 | if (tracing_group_name_override) { | |
546 | free((void *) tracing_group_name); | |
547 | } | |
b8aa1682 JD |
548 | } |
549 | ||
550 | /* | |
551 | * Write to writable pipe used to notify a thread. | |
552 | */ | |
7591bab1 | 553 | static int notify_thread_pipe(int wpipe) |
b8aa1682 | 554 | { |
6cd525e8 | 555 | ssize_t ret; |
b8aa1682 | 556 | |
6cd525e8 MD |
557 | ret = lttng_write(wpipe, "!", 1); |
558 | if (ret < 1) { | |
b8aa1682 | 559 | PERROR("write poll pipe"); |
b4aacfdc | 560 | goto end; |
b8aa1682 | 561 | } |
b4aacfdc MD |
562 | ret = 0; |
563 | end: | |
b8aa1682 JD |
564 | return ret; |
565 | } | |
566 | ||
7591bab1 | 567 | static int notify_health_quit_pipe(int *pipe) |
65931c8b | 568 | { |
6cd525e8 | 569 | ssize_t ret; |
65931c8b | 570 | |
6cd525e8 MD |
571 | ret = lttng_write(pipe[1], "4", 1); |
572 | if (ret < 1) { | |
65931c8b | 573 | PERROR("write relay health quit"); |
b4aacfdc | 574 | goto end; |
65931c8b | 575 | } |
b4aacfdc MD |
576 | ret = 0; |
577 | end: | |
578 | return ret; | |
65931c8b MD |
579 | } |
580 | ||
b8aa1682 | 581 | /* |
b4aacfdc | 582 | * Stop all relayd and relayd-live threads. |
b8aa1682 | 583 | */ |
b4aacfdc | 584 | int lttng_relay_stop_threads(void) |
b8aa1682 | 585 | { |
b4aacfdc | 586 | int retval = 0; |
b8aa1682 JD |
587 | |
588 | /* Stopping all threads */ | |
589 | DBG("Terminating all threads"); | |
b4aacfdc | 590 | if (notify_thread_pipe(thread_quit_pipe[1])) { |
b8aa1682 | 591 | ERR("write error on thread quit pipe"); |
b4aacfdc | 592 | retval = -1; |
b8aa1682 JD |
593 | } |
594 | ||
b4aacfdc MD |
595 | if (notify_health_quit_pipe(health_quit_pipe)) { |
596 | ERR("write error on health quit pipe"); | |
597 | } | |
65931c8b | 598 | |
b8aa1682 | 599 | /* Dispatch thread */ |
26c9d55e | 600 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 601 | futex_nto1_wake(&relay_conn_queue.futex); |
178a0557 | 602 | |
b4aacfdc | 603 | if (relayd_live_stop()) { |
178a0557 | 604 | ERR("Error stopping live threads"); |
b4aacfdc | 605 | retval = -1; |
178a0557 | 606 | } |
b4aacfdc | 607 | return retval; |
b8aa1682 JD |
608 | } |
609 | ||
610 | /* | |
611 | * Signal handler for the daemon | |
612 | * | |
613 | * Simply stop all worker threads, leaving main() return gracefully after | |
614 | * joining all threads and calling cleanup(). | |
615 | */ | |
7591bab1 | 616 | static void sighandler(int sig) |
b8aa1682 JD |
617 | { |
618 | switch (sig) { | |
b8aa1682 JD |
619 | case SIGINT: |
620 | DBG("SIGINT caught"); | |
b4aacfdc MD |
621 | if (lttng_relay_stop_threads()) { |
622 | ERR("Error stopping threads"); | |
623 | } | |
b8aa1682 JD |
624 | break; |
625 | case SIGTERM: | |
626 | DBG("SIGTERM caught"); | |
b4aacfdc MD |
627 | if (lttng_relay_stop_threads()) { |
628 | ERR("Error stopping threads"); | |
629 | } | |
b8aa1682 | 630 | break; |
3fd27398 MD |
631 | case SIGUSR1: |
632 | CMM_STORE_SHARED(recv_child_signal, 1); | |
633 | break; | |
b8aa1682 JD |
634 | default: |
635 | break; | |
636 | } | |
637 | } | |
638 | ||
639 | /* | |
640 | * Setup signal handler for : | |
641 | * SIGINT, SIGTERM, SIGPIPE | |
642 | */ | |
7591bab1 | 643 | static int set_signal_handler(void) |
b8aa1682 JD |
644 | { |
645 | int ret = 0; | |
646 | struct sigaction sa; | |
647 | sigset_t sigset; | |
648 | ||
649 | if ((ret = sigemptyset(&sigset)) < 0) { | |
650 | PERROR("sigemptyset"); | |
651 | return ret; | |
652 | } | |
653 | ||
b8aa1682 JD |
654 | sa.sa_mask = sigset; |
655 | sa.sa_flags = 0; | |
0072e5e2 MD |
656 | |
657 | sa.sa_handler = sighandler; | |
b8aa1682 JD |
658 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
659 | PERROR("sigaction"); | |
660 | return ret; | |
661 | } | |
662 | ||
663 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
664 | PERROR("sigaction"); | |
665 | return ret; | |
666 | } | |
667 | ||
0072e5e2 | 668 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
b8aa1682 JD |
669 | PERROR("sigaction"); |
670 | return ret; | |
671 | } | |
672 | ||
0072e5e2 MD |
673 | sa.sa_handler = SIG_IGN; |
674 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
3fd27398 MD |
675 | PERROR("sigaction"); |
676 | return ret; | |
677 | } | |
678 | ||
679 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
680 | |
681 | return ret; | |
682 | } | |
683 | ||
3fd27398 MD |
684 | void lttng_relay_notify_ready(void) |
685 | { | |
686 | /* Notify the parent of the fork() process that we are ready. */ | |
687 | if (opt_daemon || opt_background) { | |
688 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
689 | kill(child_ppid, SIGUSR1); | |
690 | } | |
691 | } | |
692 | } | |
693 | ||
b8aa1682 JD |
694 | /* |
695 | * Init thread quit pipe. | |
696 | * | |
697 | * Return -1 on error or 0 if all pipes are created. | |
698 | */ | |
7591bab1 | 699 | static int init_thread_quit_pipe(void) |
b8aa1682 | 700 | { |
a02de639 | 701 | int ret; |
b8aa1682 | 702 | |
a02de639 | 703 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 704 | |
b8aa1682 JD |
705 | return ret; |
706 | } | |
707 | ||
708 | /* | |
709 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
710 | */ | |
7591bab1 | 711 | static int create_thread_poll_set(struct lttng_poll_event *events, int size) |
b8aa1682 JD |
712 | { |
713 | int ret; | |
714 | ||
715 | if (events == NULL || size == 0) { | |
716 | ret = -1; | |
717 | goto error; | |
718 | } | |
719 | ||
720 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
721 | if (ret < 0) { | |
722 | goto error; | |
723 | } | |
724 | ||
725 | /* Add quit pipe */ | |
c7759e6a | 726 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
727 | if (ret < 0) { |
728 | goto error; | |
729 | } | |
730 | ||
731 | return 0; | |
732 | ||
733 | error: | |
734 | return ret; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Check if the thread quit pipe was triggered. | |
739 | * | |
740 | * Return 1 if it was triggered else 0; | |
741 | */ | |
7591bab1 | 742 | static int check_thread_quit_pipe(int fd, uint32_t events) |
b8aa1682 JD |
743 | { |
744 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
745 | return 1; | |
746 | } | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Create and init socket from uri. | |
753 | */ | |
7591bab1 | 754 | static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri) |
b8aa1682 JD |
755 | { |
756 | int ret; | |
757 | struct lttcomm_sock *sock = NULL; | |
758 | ||
759 | sock = lttcomm_alloc_sock_from_uri(uri); | |
760 | if (sock == NULL) { | |
761 | ERR("Allocating socket"); | |
762 | goto error; | |
763 | } | |
764 | ||
765 | ret = lttcomm_create_sock(sock); | |
766 | if (ret < 0) { | |
767 | goto error; | |
768 | } | |
769 | DBG("Listening on sock %d", sock->fd); | |
770 | ||
771 | ret = sock->ops->bind(sock); | |
772 | if (ret < 0) { | |
e6c533d6 | 773 | PERROR("Failed to bind socket"); |
b8aa1682 JD |
774 | goto error; |
775 | } | |
776 | ||
777 | ret = sock->ops->listen(sock, -1); | |
778 | if (ret < 0) { | |
779 | goto error; | |
780 | ||
781 | } | |
782 | ||
783 | return sock; | |
784 | ||
785 | error: | |
786 | if (sock) { | |
787 | lttcomm_destroy_sock(sock); | |
788 | } | |
789 | return NULL; | |
790 | } | |
791 | ||
792 | /* | |
793 | * This thread manages the listening for new connections on the network | |
794 | */ | |
7591bab1 | 795 | static void *relay_thread_listener(void *data) |
b8aa1682 | 796 | { |
095a4ae5 | 797 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
798 | uint32_t revents, nb_fd; |
799 | struct lttng_poll_event events; | |
800 | struct lttcomm_sock *control_sock, *data_sock; | |
801 | ||
b8aa1682 JD |
802 | DBG("[thread] Relay listener started"); |
803 | ||
55706a7d MD |
804 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
805 | ||
f385ae0a MD |
806 | health_code_update(); |
807 | ||
7591bab1 | 808 | control_sock = relay_socket_create(control_uri); |
b8aa1682 | 809 | if (!control_sock) { |
095a4ae5 | 810 | goto error_sock_control; |
b8aa1682 JD |
811 | } |
812 | ||
7591bab1 | 813 | data_sock = relay_socket_create(data_uri); |
b8aa1682 | 814 | if (!data_sock) { |
095a4ae5 | 815 | goto error_sock_relay; |
b8aa1682 JD |
816 | } |
817 | ||
818 | /* | |
7591bab1 MD |
819 | * Pass 3 as size here for the thread quit pipe, control and |
820 | * data socket. | |
b8aa1682 JD |
821 | */ |
822 | ret = create_thread_poll_set(&events, 3); | |
823 | if (ret < 0) { | |
824 | goto error_create_poll; | |
825 | } | |
826 | ||
827 | /* Add the control socket */ | |
828 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
829 | if (ret < 0) { | |
830 | goto error_poll_add; | |
831 | } | |
832 | ||
833 | /* Add the data socket */ | |
834 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
835 | if (ret < 0) { | |
836 | goto error_poll_add; | |
837 | } | |
838 | ||
3fd27398 MD |
839 | lttng_relay_notify_ready(); |
840 | ||
9b5e0863 MD |
841 | if (testpoint(relayd_thread_listener)) { |
842 | goto error_testpoint; | |
843 | } | |
844 | ||
b8aa1682 | 845 | while (1) { |
f385ae0a MD |
846 | health_code_update(); |
847 | ||
b8aa1682 JD |
848 | DBG("Listener accepting connections"); |
849 | ||
b8aa1682 | 850 | restart: |
f385ae0a | 851 | health_poll_entry(); |
b8aa1682 | 852 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 853 | health_poll_exit(); |
b8aa1682 JD |
854 | if (ret < 0) { |
855 | /* | |
856 | * Restart interrupted system call. | |
857 | */ | |
858 | if (errno == EINTR) { | |
859 | goto restart; | |
860 | } | |
861 | goto error; | |
862 | } | |
863 | ||
0d9c5d77 DG |
864 | nb_fd = ret; |
865 | ||
b8aa1682 JD |
866 | DBG("Relay new connection received"); |
867 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
868 | health_code_update(); |
869 | ||
b8aa1682 JD |
870 | /* Fetch once the poll data */ |
871 | revents = LTTNG_POLL_GETEV(&events, i); | |
872 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
873 | ||
fd20dac9 | 874 | if (!revents) { |
7591bab1 MD |
875 | /* |
876 | * No activity for this FD (poll | |
877 | * implementation). | |
878 | */ | |
fd20dac9 MD |
879 | continue; |
880 | } | |
881 | ||
b8aa1682 JD |
882 | /* Thread quit pipe has been closed. Killing thread. */ |
883 | ret = check_thread_quit_pipe(pollfd, revents); | |
884 | if (ret) { | |
095a4ae5 MD |
885 | err = 0; |
886 | goto exit; | |
b8aa1682 JD |
887 | } |
888 | ||
03e43155 | 889 | if (revents & LPOLLIN) { |
4b7f17b2 | 890 | /* |
7591bab1 MD |
891 | * A new connection is requested, therefore a |
892 | * sessiond/consumerd connection is allocated in | |
893 | * this thread, enqueued to a global queue and | |
894 | * dequeued (and freed) in the worker thread. | |
4b7f17b2 | 895 | */ |
58eb9381 DG |
896 | int val = 1; |
897 | struct relay_connection *new_conn; | |
4b7f17b2 | 898 | struct lttcomm_sock *newsock; |
7591bab1 | 899 | enum connection_type type; |
b8aa1682 JD |
900 | |
901 | if (pollfd == data_sock->fd) { | |
7591bab1 | 902 | type = RELAY_DATA; |
b8aa1682 | 903 | newsock = data_sock->ops->accept(data_sock); |
58eb9381 DG |
904 | DBG("Relay data connection accepted, socket %d", |
905 | newsock->fd); | |
4b7f17b2 MD |
906 | } else { |
907 | assert(pollfd == control_sock->fd); | |
7591bab1 | 908 | type = RELAY_CONTROL; |
b8aa1682 | 909 | newsock = control_sock->ops->accept(control_sock); |
58eb9381 DG |
910 | DBG("Relay control connection accepted, socket %d", |
911 | newsock->fd); | |
b8aa1682 | 912 | } |
58eb9381 DG |
913 | if (!newsock) { |
914 | PERROR("accepting sock"); | |
58eb9381 DG |
915 | goto error; |
916 | } | |
917 | ||
918 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
919 | sizeof(val)); | |
b8aa1682 JD |
920 | if (ret < 0) { |
921 | PERROR("setsockopt inet"); | |
4b7f17b2 | 922 | lttcomm_destroy_sock(newsock); |
b8aa1682 JD |
923 | goto error; |
924 | } | |
8af38ec0 JR |
925 | |
926 | ret = socket_apply_keep_alive_config(newsock->fd); | |
927 | if (ret < 0) { | |
928 | ERR("Failed to apply TCP keep-alive configuration on socket (%i)", | |
929 | newsock->fd); | |
930 | lttcomm_destroy_sock(newsock); | |
931 | goto error; | |
932 | } | |
933 | ||
7591bab1 MD |
934 | new_conn = connection_create(newsock, type); |
935 | if (!new_conn) { | |
936 | lttcomm_destroy_sock(newsock); | |
937 | goto error; | |
938 | } | |
58eb9381 DG |
939 | |
940 | /* Enqueue request for the dispatcher thread. */ | |
8bdee6e2 SM |
941 | cds_wfcq_enqueue(&relay_conn_queue.head, &relay_conn_queue.tail, |
942 | &new_conn->qnode); | |
b8aa1682 JD |
943 | |
944 | /* | |
7591bab1 MD |
945 | * Wake the dispatch queue futex. |
946 | * Implicit memory barrier with the | |
947 | * exchange in cds_wfcq_enqueue. | |
b8aa1682 | 948 | */ |
58eb9381 | 949 | futex_nto1_wake(&relay_conn_queue.futex); |
03e43155 MD |
950 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
951 | ERR("socket poll error"); | |
952 | goto error; | |
953 | } else { | |
954 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
955 | goto error; | |
b8aa1682 JD |
956 | } |
957 | } | |
958 | } | |
959 | ||
095a4ae5 | 960 | exit: |
b8aa1682 JD |
961 | error: |
962 | error_poll_add: | |
9b5e0863 | 963 | error_testpoint: |
b8aa1682 JD |
964 | lttng_poll_clean(&events); |
965 | error_create_poll: | |
095a4ae5 MD |
966 | if (data_sock->fd >= 0) { |
967 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
968 | if (ret) { |
969 | PERROR("close"); | |
970 | } | |
b8aa1682 | 971 | } |
095a4ae5 MD |
972 | lttcomm_destroy_sock(data_sock); |
973 | error_sock_relay: | |
974 | if (control_sock->fd >= 0) { | |
975 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
976 | if (ret) { |
977 | PERROR("close"); | |
978 | } | |
b8aa1682 | 979 | } |
095a4ae5 MD |
980 | lttcomm_destroy_sock(control_sock); |
981 | error_sock_control: | |
982 | if (err) { | |
f385ae0a MD |
983 | health_error(); |
984 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 985 | } |
55706a7d | 986 | health_unregister(health_relayd); |
b8aa1682 | 987 | DBG("Relay listener thread cleanup complete"); |
b4aacfdc | 988 | lttng_relay_stop_threads(); |
b8aa1682 JD |
989 | return NULL; |
990 | } | |
991 | ||
992 | /* | |
993 | * This thread manages the dispatching of the requests to worker threads | |
994 | */ | |
7591bab1 | 995 | static void *relay_thread_dispatcher(void *data) |
b8aa1682 | 996 | { |
6cd525e8 MD |
997 | int err = -1; |
998 | ssize_t ret; | |
8bdee6e2 | 999 | struct cds_wfcq_node *node; |
58eb9381 | 1000 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
1001 | |
1002 | DBG("[thread] Relay dispatcher started"); | |
1003 | ||
55706a7d MD |
1004 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
1005 | ||
9b5e0863 MD |
1006 | if (testpoint(relayd_thread_dispatcher)) { |
1007 | goto error_testpoint; | |
1008 | } | |
1009 | ||
f385ae0a MD |
1010 | health_code_update(); |
1011 | ||
5f7d3a72 | 1012 | for (;;) { |
f385ae0a MD |
1013 | health_code_update(); |
1014 | ||
b8aa1682 | 1015 | /* Atomically prepare the queue futex */ |
58eb9381 | 1016 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 | 1017 | |
5f7d3a72 MD |
1018 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1019 | break; | |
1020 | } | |
1021 | ||
b8aa1682 | 1022 | do { |
f385ae0a MD |
1023 | health_code_update(); |
1024 | ||
b8aa1682 | 1025 | /* Dequeue commands */ |
8bdee6e2 SM |
1026 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
1027 | &relay_conn_queue.tail); | |
b8aa1682 JD |
1028 | if (node == NULL) { |
1029 | DBG("Woken up but nothing in the relay command queue"); | |
1030 | /* Continue thread execution */ | |
1031 | break; | |
1032 | } | |
58eb9381 | 1033 | new_conn = caa_container_of(node, struct relay_connection, qnode); |
b8aa1682 | 1034 | |
58eb9381 | 1035 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
1036 | |
1037 | /* | |
7591bab1 MD |
1038 | * Inform worker thread of the new request. This |
1039 | * call is blocking so we can be assured that | |
1040 | * the data will be read at some point in time | |
1041 | * or wait to the end of the world :) | |
b8aa1682 | 1042 | */ |
58eb9381 DG |
1043 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
1044 | if (ret < 0) { | |
1045 | PERROR("write connection pipe"); | |
7591bab1 | 1046 | connection_put(new_conn); |
b8aa1682 JD |
1047 | goto error; |
1048 | } | |
1049 | } while (node != NULL); | |
1050 | ||
1051 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 1052 | health_poll_entry(); |
58eb9381 | 1053 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 1054 | health_poll_exit(); |
b8aa1682 JD |
1055 | } |
1056 | ||
f385ae0a MD |
1057 | /* Normal exit, no error */ |
1058 | err = 0; | |
1059 | ||
b8aa1682 | 1060 | error: |
9b5e0863 | 1061 | error_testpoint: |
f385ae0a MD |
1062 | if (err) { |
1063 | health_error(); | |
1064 | ERR("Health error occurred in %s", __func__); | |
1065 | } | |
55706a7d | 1066 | health_unregister(health_relayd); |
b8aa1682 | 1067 | DBG("Dispatch thread dying"); |
b4aacfdc | 1068 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1069 | return NULL; |
1070 | } | |
1071 | ||
b8aa1682 | 1072 | /* |
7591bab1 | 1073 | * Set index data from the control port to a given index object. |
b8aa1682 | 1074 | */ |
7591bab1 | 1075 | static int set_index_control_data(struct relay_index *index, |
234cd636 JD |
1076 | struct lttcomm_relayd_index *data, |
1077 | struct relay_connection *conn) | |
1c20f0e2 | 1078 | { |
7591bab1 | 1079 | struct ctf_packet_index index_data; |
1c20f0e2 JD |
1080 | |
1081 | /* | |
7591bab1 MD |
1082 | * The index on disk is encoded in big endian, so we don't need |
1083 | * to convert the data received on the network. The data_offset | |
1084 | * value is NEVER modified here and is updated by the data | |
1085 | * thread. | |
1c20f0e2 | 1086 | */ |
7591bab1 MD |
1087 | index_data.packet_size = data->packet_size; |
1088 | index_data.content_size = data->content_size; | |
1089 | index_data.timestamp_begin = data->timestamp_begin; | |
1090 | index_data.timestamp_end = data->timestamp_end; | |
1091 | index_data.events_discarded = data->events_discarded; | |
1092 | index_data.stream_id = data->stream_id; | |
234cd636 JD |
1093 | |
1094 | if (conn->minor >= 8) { | |
1095 | index->index_data.stream_instance_id = data->stream_instance_id; | |
1096 | index->index_data.packet_seq_num = data->packet_seq_num; | |
1097 | } | |
1098 | ||
7591bab1 | 1099 | return relay_index_set_data(index, &index_data); |
1c20f0e2 JD |
1100 | } |
1101 | ||
c5b6f4f0 DG |
1102 | /* |
1103 | * Handle the RELAYD_CREATE_SESSION command. | |
1104 | * | |
1105 | * On success, send back the session id or else return a negative value. | |
1106 | */ | |
7591bab1 | 1107 | static int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1108 | struct relay_connection *conn) |
c5b6f4f0 DG |
1109 | { |
1110 | int ret = 0, send_ret; | |
1111 | struct relay_session *session; | |
1112 | struct lttcomm_relayd_status_session reply; | |
36d2e35d | 1113 | char session_name[LTTNG_NAME_MAX]; |
9cf3eb20 | 1114 | char hostname[LTTNG_HOST_NAME_MAX]; |
7591bab1 MD |
1115 | uint32_t live_timer = 0; |
1116 | bool snapshot = false; | |
c5b6f4f0 | 1117 | |
36d2e35d | 1118 | memset(session_name, 0, LTTNG_NAME_MAX); |
9cf3eb20 | 1119 | memset(hostname, 0, LTTNG_HOST_NAME_MAX); |
c5b6f4f0 DG |
1120 | |
1121 | memset(&reply, 0, sizeof(reply)); | |
1122 | ||
58eb9381 | 1123 | switch (conn->minor) { |
2a174661 DG |
1124 | case 1: |
1125 | case 2: | |
1126 | case 3: | |
1127 | break; | |
1128 | case 4: /* LTTng sessiond 2.4 */ | |
1129 | default: | |
7591bab1 MD |
1130 | ret = cmd_create_session_2_4(conn, session_name, |
1131 | hostname, &live_timer, &snapshot); | |
1132 | } | |
1133 | if (ret < 0) { | |
1134 | goto send_reply; | |
d3e2ba59 JD |
1135 | } |
1136 | ||
7591bab1 MD |
1137 | session = session_create(session_name, hostname, live_timer, |
1138 | snapshot, conn->major, conn->minor); | |
1139 | if (!session) { | |
1140 | ret = -1; | |
1141 | goto send_reply; | |
1142 | } | |
1143 | assert(!conn->session); | |
1144 | conn->session = session; | |
c5b6f4f0 DG |
1145 | DBG("Created session %" PRIu64, session->id); |
1146 | ||
7591bab1 MD |
1147 | reply.session_id = htobe64(session->id); |
1148 | ||
1149 | send_reply: | |
c5b6f4f0 DG |
1150 | if (ret < 0) { |
1151 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
1152 | } else { | |
1153 | reply.ret_code = htobe32(LTTNG_OK); | |
1154 | } | |
1155 | ||
58eb9381 | 1156 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c5b6f4f0 DG |
1157 | if (send_ret < 0) { |
1158 | ERR("Relayd sending session id"); | |
4169f5ad | 1159 | ret = send_ret; |
c5b6f4f0 DG |
1160 | } |
1161 | ||
1162 | return ret; | |
1163 | } | |
1164 | ||
a4baae1b JD |
1165 | /* |
1166 | * When we have received all the streams and the metadata for a channel, | |
1167 | * we make them visible to the viewer threads. | |
1168 | */ | |
7591bab1 | 1169 | static void publish_connection_local_streams(struct relay_connection *conn) |
a4baae1b | 1170 | { |
7591bab1 MD |
1171 | struct relay_stream *stream; |
1172 | struct relay_session *session = conn->session; | |
a4baae1b | 1173 | |
7591bab1 MD |
1174 | /* |
1175 | * We publish all streams belonging to a session atomically wrt | |
1176 | * session lock. | |
1177 | */ | |
1178 | pthread_mutex_lock(&session->lock); | |
1179 | rcu_read_lock(); | |
1180 | cds_list_for_each_entry_rcu(stream, &session->recv_list, | |
1181 | recv_node) { | |
1182 | stream_publish(stream); | |
a4baae1b | 1183 | } |
7591bab1 | 1184 | rcu_read_unlock(); |
a4baae1b | 1185 | |
7591bab1 MD |
1186 | /* |
1187 | * Inform the viewer that there are new streams in the session. | |
1188 | */ | |
1189 | if (session->viewer_attached) { | |
1190 | uatomic_set(&session->new_streams, 1); | |
1191 | } | |
1192 | pthread_mutex_unlock(&session->lock); | |
a4baae1b JD |
1193 | } |
1194 | ||
b8aa1682 JD |
1195 | /* |
1196 | * relay_add_stream: allocate a new stream for a session | |
1197 | */ | |
7591bab1 | 1198 | static int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1199 | struct relay_connection *conn) |
b8aa1682 | 1200 | { |
7591bab1 MD |
1201 | int ret; |
1202 | ssize_t send_ret; | |
58eb9381 | 1203 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1204 | struct relay_stream *stream = NULL; |
1205 | struct lttcomm_relayd_status_stream reply; | |
4030a636 | 1206 | struct ctf_trace *trace = NULL; |
7591bab1 MD |
1207 | uint64_t stream_handle = -1ULL; |
1208 | char *path_name = NULL, *channel_name = NULL; | |
1209 | uint64_t tracefile_size = 0, tracefile_count = 0; | |
b8aa1682 | 1210 | |
58eb9381 | 1211 | if (!session || conn->version_check_done == 0) { |
b8aa1682 JD |
1212 | ERR("Trying to add a stream before version check"); |
1213 | ret = -1; | |
1214 | goto end_no_session; | |
1215 | } | |
1216 | ||
7591bab1 MD |
1217 | switch (session->minor) { |
1218 | case 1: /* LTTng sessiond 2.1. Allocates path_name and channel_name. */ | |
1219 | ret = cmd_recv_stream_2_1(conn, &path_name, | |
1220 | &channel_name); | |
0f907de1 | 1221 | break; |
7591bab1 | 1222 | case 2: /* LTTng sessiond 2.2. Allocates path_name and channel_name. */ |
0f907de1 | 1223 | default: |
7591bab1 MD |
1224 | ret = cmd_recv_stream_2_2(conn, &path_name, |
1225 | &channel_name, &tracefile_size, &tracefile_count); | |
0f907de1 JD |
1226 | break; |
1227 | } | |
1228 | if (ret < 0) { | |
7591bab1 | 1229 | goto send_reply; |
b8aa1682 JD |
1230 | } |
1231 | ||
7591bab1 | 1232 | trace = ctf_trace_get_by_path_or_create(session, path_name); |
2a174661 | 1233 | if (!trace) { |
7591bab1 | 1234 | goto send_reply; |
2a174661 | 1235 | } |
7591bab1 | 1236 | /* This stream here has one reference on the trace. */ |
2a174661 | 1237 | |
7591bab1 MD |
1238 | pthread_mutex_lock(&last_relay_stream_id_lock); |
1239 | stream_handle = ++last_relay_stream_id; | |
1240 | pthread_mutex_unlock(&last_relay_stream_id_lock); | |
d3e2ba59 | 1241 | |
7591bab1 MD |
1242 | /* We pass ownership of path_name and channel_name. */ |
1243 | stream = stream_create(trace, stream_handle, path_name, | |
1244 | channel_name, tracefile_size, tracefile_count); | |
1245 | path_name = NULL; | |
1246 | channel_name = NULL; | |
a4baae1b | 1247 | |
2a174661 | 1248 | /* |
7591bab1 MD |
1249 | * Streams are the owners of their trace. Reference to trace is |
1250 | * kept within stream_create(). | |
2a174661 | 1251 | */ |
7591bab1 | 1252 | ctf_trace_put(trace); |
d3e2ba59 | 1253 | |
7591bab1 | 1254 | send_reply: |
53efb85a | 1255 | memset(&reply, 0, sizeof(reply)); |
7591bab1 MD |
1256 | reply.handle = htobe64(stream_handle); |
1257 | if (!stream) { | |
f73fabfd | 1258 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 1259 | } else { |
f73fabfd | 1260 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1261 | } |
5af40280 | 1262 | |
58eb9381 | 1263 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1264 | sizeof(struct lttcomm_relayd_status_stream), 0); |
1265 | if (send_ret < 0) { | |
1266 | ERR("Relay sending stream id"); | |
7591bab1 | 1267 | ret = (int) send_ret; |
b8aa1682 JD |
1268 | } |
1269 | ||
1270 | end_no_session: | |
7591bab1 MD |
1271 | free(path_name); |
1272 | free(channel_name); | |
0f907de1 | 1273 | return ret; |
b8aa1682 JD |
1274 | } |
1275 | ||
173af62f DG |
1276 | /* |
1277 | * relay_close_stream: close a specific stream | |
1278 | */ | |
7591bab1 | 1279 | static int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1280 | struct relay_connection *conn) |
173af62f | 1281 | { |
94d49140 | 1282 | int ret, send_ret; |
58eb9381 | 1283 | struct relay_session *session = conn->session; |
173af62f DG |
1284 | struct lttcomm_relayd_close_stream stream_info; |
1285 | struct lttcomm_relayd_generic_reply reply; | |
1286 | struct relay_stream *stream; | |
173af62f DG |
1287 | |
1288 | DBG("Close stream received"); | |
1289 | ||
58eb9381 | 1290 | if (!session || conn->version_check_done == 0) { |
173af62f DG |
1291 | ERR("Trying to close a stream before version check"); |
1292 | ret = -1; | |
1293 | goto end_no_session; | |
1294 | } | |
1295 | ||
58eb9381 | 1296 | ret = conn->sock->ops->recvmsg(conn->sock, &stream_info, |
7c5aef62 | 1297 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f | 1298 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
a6cd2b97 DG |
1299 | if (ret == 0) { |
1300 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1301 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1302 | } else { |
1303 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
1304 | } | |
173af62f DG |
1305 | ret = -1; |
1306 | goto end_no_session; | |
1307 | } | |
1308 | ||
7591bab1 | 1309 | stream = stream_get_by_id(be64toh(stream_info.stream_id)); |
173af62f DG |
1310 | if (!stream) { |
1311 | ret = -1; | |
7591bab1 | 1312 | goto end; |
173af62f | 1313 | } |
77f7bd85 MD |
1314 | |
1315 | /* | |
1316 | * Set last_net_seq_num before the close flag. Required by data | |
1317 | * pending check. | |
1318 | */ | |
7591bab1 | 1319 | pthread_mutex_lock(&stream->lock); |
8e2583a4 | 1320 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
77f7bd85 MD |
1321 | pthread_mutex_unlock(&stream->lock); |
1322 | ||
bda7c7b9 JG |
1323 | /* |
1324 | * This is one of the conditions which may trigger a stream close | |
1325 | * with the others being: | |
1326 | * 1) A close command is received for a stream | |
1327 | * 2) The control connection owning the stream is closed | |
1328 | * 3) We have received all of the stream's data _after_ a close | |
1329 | * request. | |
1330 | */ | |
1331 | try_stream_close(stream); | |
7591bab1 MD |
1332 | if (stream->is_metadata) { |
1333 | struct relay_viewer_stream *vstream; | |
173af62f | 1334 | |
7591bab1 MD |
1335 | vstream = viewer_stream_get_by_id(stream->stream_handle); |
1336 | if (vstream) { | |
1337 | if (vstream->metadata_sent == stream->metadata_received) { | |
1338 | /* | |
1339 | * Since all the metadata has been sent to the | |
1340 | * viewer and that we have a request to close | |
1341 | * its stream, we can safely teardown the | |
1342 | * corresponding metadata viewer stream. | |
1343 | */ | |
1344 | viewer_stream_put(vstream); | |
1345 | } | |
1346 | /* Put local reference. */ | |
1347 | viewer_stream_put(vstream); | |
1348 | } | |
1349 | } | |
7591bab1 | 1350 | stream_put(stream); |
173af62f | 1351 | |
7591bab1 | 1352 | end: |
53efb85a | 1353 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1354 | if (ret < 0) { |
f73fabfd | 1355 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1356 | } else { |
f73fabfd | 1357 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1358 | } |
58eb9381 | 1359 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f DG |
1360 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1361 | if (send_ret < 0) { | |
1362 | ERR("Relay sending stream id"); | |
4169f5ad | 1363 | ret = send_ret; |
173af62f DG |
1364 | } |
1365 | ||
1366 | end_no_session: | |
1367 | return ret; | |
1368 | } | |
1369 | ||
93ec662e JD |
1370 | /* |
1371 | * relay_reset_metadata: reset a metadata stream | |
1372 | */ | |
1373 | static | |
1374 | int relay_reset_metadata(struct lttcomm_relayd_hdr *recv_hdr, | |
1375 | struct relay_connection *conn) | |
1376 | { | |
1377 | int ret, send_ret; | |
1378 | struct relay_session *session = conn->session; | |
1379 | struct lttcomm_relayd_reset_metadata stream_info; | |
1380 | struct lttcomm_relayd_generic_reply reply; | |
1381 | struct relay_stream *stream; | |
1382 | ||
1383 | DBG("Reset metadata received"); | |
1384 | ||
1385 | if (!session || conn->version_check_done == 0) { | |
1386 | ERR("Trying to reset a metadata stream before version check"); | |
1387 | ret = -1; | |
1388 | goto end_no_session; | |
1389 | } | |
1390 | ||
1391 | ret = conn->sock->ops->recvmsg(conn->sock, &stream_info, | |
1392 | sizeof(struct lttcomm_relayd_reset_metadata), 0); | |
1393 | if (ret < sizeof(struct lttcomm_relayd_reset_metadata)) { | |
1394 | if (ret == 0) { | |
1395 | /* Orderly shutdown. Not necessary to print an error. */ | |
1396 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); | |
1397 | } else { | |
1398 | ERR("Relay didn't receive valid reset_metadata struct " | |
1399 | "size : %d", ret); | |
1400 | } | |
1401 | ret = -1; | |
1402 | goto end_no_session; | |
1403 | } | |
1404 | DBG("Update metadata to version %" PRIu64, be64toh(stream_info.version)); | |
1405 | ||
1406 | /* Unsupported for live sessions for now. */ | |
1407 | if (session->live_timer != 0) { | |
1408 | ret = -1; | |
1409 | goto end; | |
1410 | } | |
1411 | ||
1412 | stream = stream_get_by_id(be64toh(stream_info.stream_id)); | |
1413 | if (!stream) { | |
1414 | ret = -1; | |
1415 | goto end; | |
1416 | } | |
1417 | pthread_mutex_lock(&stream->lock); | |
1418 | if (!stream->is_metadata) { | |
1419 | ret = -1; | |
1420 | goto end_unlock; | |
1421 | } | |
1422 | ||
1423 | ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, | |
1424 | 0, 0, -1, -1, stream->stream_fd->fd, NULL, | |
1425 | &stream->stream_fd->fd); | |
1426 | if (ret < 0) { | |
1427 | ERR("Failed to rotate metadata file %s of channel %s", | |
1428 | stream->path_name, stream->channel_name); | |
1429 | goto end_unlock; | |
1430 | } | |
1431 | ||
1432 | end_unlock: | |
1433 | pthread_mutex_unlock(&stream->lock); | |
1434 | stream_put(stream); | |
1435 | ||
1436 | end: | |
1437 | memset(&reply, 0, sizeof(reply)); | |
1438 | if (ret < 0) { | |
1439 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1440 | } else { | |
1441 | reply.ret_code = htobe32(LTTNG_OK); | |
1442 | } | |
1443 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1444 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
1445 | if (send_ret < 0) { | |
1446 | ERR("Relay sending reset metadata reply"); | |
1447 | ret = send_ret; | |
1448 | } | |
1449 | ||
1450 | end_no_session: | |
1451 | return ret; | |
1452 | } | |
1453 | ||
b8aa1682 JD |
1454 | /* |
1455 | * relay_unknown_command: send -1 if received unknown command | |
1456 | */ | |
7591bab1 | 1457 | static void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1458 | { |
1459 | struct lttcomm_relayd_generic_reply reply; | |
1460 | int ret; | |
1461 | ||
53efb85a | 1462 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1463 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1464 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1465 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1466 | if (ret < 0) { | |
1467 | ERR("Relay sending unknown command"); | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | /* | |
1472 | * relay_start: send an acknowledgment to the client to tell if we are | |
1473 | * ready to receive data. We are ready if a session is established. | |
1474 | */ | |
7591bab1 | 1475 | static int relay_start(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1476 | struct relay_connection *conn) |
b8aa1682 | 1477 | { |
f73fabfd | 1478 | int ret = htobe32(LTTNG_OK); |
b8aa1682 | 1479 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1480 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1481 | |
1482 | if (!session) { | |
1483 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1484 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1485 | } |
1486 | ||
53efb85a | 1487 | memset(&reply, 0, sizeof(reply)); |
b8aa1682 | 1488 | reply.ret_code = ret; |
58eb9381 | 1489 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1490 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1491 | if (ret < 0) { | |
1492 | ERR("Relay sending start ack"); | |
1493 | } | |
1494 | ||
1495 | return ret; | |
1496 | } | |
1497 | ||
1d4dfdef DG |
1498 | /* |
1499 | * Append padding to the file pointed by the file descriptor fd. | |
1500 | */ | |
1501 | static int write_padding_to_file(int fd, uint32_t size) | |
1502 | { | |
6cd525e8 | 1503 | ssize_t ret = 0; |
1d4dfdef DG |
1504 | char *zeros; |
1505 | ||
1506 | if (size == 0) { | |
1507 | goto end; | |
1508 | } | |
1509 | ||
1510 | zeros = zmalloc(size); | |
1511 | if (zeros == NULL) { | |
1512 | PERROR("zmalloc zeros for padding"); | |
1513 | ret = -1; | |
1514 | goto end; | |
1515 | } | |
1516 | ||
6cd525e8 MD |
1517 | ret = lttng_write(fd, zeros, size); |
1518 | if (ret < size) { | |
1d4dfdef DG |
1519 | PERROR("write padding to file"); |
1520 | } | |
1521 | ||
e986c7a1 DG |
1522 | free(zeros); |
1523 | ||
1d4dfdef DG |
1524 | end: |
1525 | return ret; | |
1526 | } | |
1527 | ||
b8aa1682 | 1528 | /* |
7591bab1 | 1529 | * relay_recv_metadata: receive the metadata for the session. |
b8aa1682 | 1530 | */ |
7591bab1 | 1531 | static int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1532 | struct relay_connection *conn) |
b8aa1682 | 1533 | { |
32d1569c | 1534 | int ret = 0; |
6cd525e8 | 1535 | ssize_t size_ret; |
58eb9381 | 1536 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1537 | struct lttcomm_relayd_metadata_payload *metadata_struct; |
1538 | struct relay_stream *metadata_stream; | |
1539 | uint64_t data_size, payload_size; | |
1540 | ||
1541 | if (!session) { | |
1542 | ERR("Metadata sent before version check"); | |
1543 | ret = -1; | |
1544 | goto end; | |
1545 | } | |
1546 | ||
f6416125 MD |
1547 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1548 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1549 | ERR("Incorrect data size"); | |
1550 | ret = -1; | |
1551 | goto end; | |
1552 | } | |
1553 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1554 | ||
b8aa1682 | 1555 | if (data_buffer_size < data_size) { |
d7b3776f | 1556 | /* In case the realloc fails, we can free the memory */ |
c617c0c6 MD |
1557 | char *tmp_data_ptr; |
1558 | ||
1559 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1560 | if (!tmp_data_ptr) { | |
b8aa1682 | 1561 | ERR("Allocating data buffer"); |
c617c0c6 | 1562 | free(data_buffer); |
b8aa1682 JD |
1563 | ret = -1; |
1564 | goto end; | |
1565 | } | |
c617c0c6 | 1566 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1567 | data_buffer_size = data_size; |
1568 | } | |
1569 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1570 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
32d1569c JG |
1571 | size_ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0); |
1572 | if (size_ret < 0 || size_ret != data_size) { | |
1573 | if (size_ret == 0) { | |
a6cd2b97 | 1574 | /* Orderly shutdown. Not necessary to print an error. */ |
58eb9381 | 1575 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1576 | } else { |
1577 | ERR("Relay didn't receive the whole metadata"); | |
1578 | } | |
b8aa1682 | 1579 | ret = -1; |
b8aa1682 JD |
1580 | goto end; |
1581 | } | |
1582 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 | 1583 | |
7591bab1 | 1584 | metadata_stream = stream_get_by_id(be64toh(metadata_struct->stream_id)); |
b8aa1682 JD |
1585 | if (!metadata_stream) { |
1586 | ret = -1; | |
7591bab1 | 1587 | goto end; |
b8aa1682 JD |
1588 | } |
1589 | ||
7591bab1 MD |
1590 | pthread_mutex_lock(&metadata_stream->lock); |
1591 | ||
1592 | size_ret = lttng_write(metadata_stream->stream_fd->fd, metadata_struct->payload, | |
6cd525e8 MD |
1593 | payload_size); |
1594 | if (size_ret < payload_size) { | |
b8aa1682 JD |
1595 | ERR("Relay error writing metadata on file"); |
1596 | ret = -1; | |
7591bab1 | 1597 | goto end_put; |
b8aa1682 | 1598 | } |
1d4dfdef | 1599 | |
32d1569c | 1600 | size_ret = write_padding_to_file(metadata_stream->stream_fd->fd, |
1d4dfdef | 1601 | be32toh(metadata_struct->padding_size)); |
32d1569c | 1602 | if (size_ret < 0) { |
7591bab1 | 1603 | goto end_put; |
1d4dfdef | 1604 | } |
2a174661 | 1605 | |
7591bab1 | 1606 | metadata_stream->metadata_received += |
d3e2ba59 | 1607 | payload_size + be32toh(metadata_struct->padding_size); |
7591bab1 MD |
1608 | DBG2("Relay metadata written. Updated metadata_received %" PRIu64, |
1609 | metadata_stream->metadata_received); | |
1d4dfdef | 1610 | |
7591bab1 MD |
1611 | end_put: |
1612 | pthread_mutex_unlock(&metadata_stream->lock); | |
1613 | stream_put(metadata_stream); | |
b8aa1682 JD |
1614 | end: |
1615 | return ret; | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * relay_send_version: send relayd version number | |
1620 | */ | |
7591bab1 | 1621 | static int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1622 | struct relay_connection *conn) |
b8aa1682 | 1623 | { |
7f51dcba | 1624 | int ret; |
092b6259 | 1625 | struct lttcomm_relayd_version reply, msg; |
b28f7baa | 1626 | bool compatible = true; |
b8aa1682 | 1627 | |
58eb9381 | 1628 | conn->version_check_done = 1; |
b8aa1682 | 1629 | |
092b6259 | 1630 | /* Get version from the other side. */ |
58eb9381 | 1631 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
092b6259 | 1632 | if (ret < 0 || ret != sizeof(msg)) { |
a6cd2b97 DG |
1633 | if (ret == 0) { |
1634 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1635 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1636 | } else { |
1637 | ERR("Relay failed to receive the version values."); | |
1638 | } | |
092b6259 | 1639 | ret = -1; |
092b6259 DG |
1640 | goto end; |
1641 | } | |
1642 | ||
53efb85a | 1643 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
1644 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1645 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1646 | |
1647 | /* Major versions must be the same */ | |
1648 | if (reply.major != be32toh(msg.major)) { | |
6151a90f JD |
1649 | DBG("Incompatible major versions (%u vs %u), deleting session", |
1650 | reply.major, be32toh(msg.major)); | |
b28f7baa | 1651 | compatible = false; |
d4519fa3 JD |
1652 | } |
1653 | ||
58eb9381 | 1654 | conn->major = reply.major; |
0f907de1 JD |
1655 | /* We adapt to the lowest compatible version */ |
1656 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 1657 | conn->minor = reply.minor; |
0f907de1 | 1658 | } else { |
58eb9381 | 1659 | conn->minor = be32toh(msg.minor); |
0f907de1 JD |
1660 | } |
1661 | ||
6151a90f JD |
1662 | reply.major = htobe32(reply.major); |
1663 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 1664 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
6151a90f JD |
1665 | sizeof(struct lttcomm_relayd_version), 0); |
1666 | if (ret < 0) { | |
1667 | ERR("Relay sending version"); | |
1668 | } | |
1669 | ||
b28f7baa JD |
1670 | if (!compatible) { |
1671 | ret = -1; | |
1672 | goto end; | |
1673 | } | |
1674 | ||
58eb9381 DG |
1675 | DBG("Version check done using protocol %u.%u", conn->major, |
1676 | conn->minor); | |
b8aa1682 JD |
1677 | |
1678 | end: | |
1679 | return ret; | |
1680 | } | |
1681 | ||
c8f59ee5 | 1682 | /* |
6d805429 | 1683 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 | 1684 | */ |
7591bab1 | 1685 | static int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1686 | struct relay_connection *conn) |
c8f59ee5 | 1687 | { |
58eb9381 | 1688 | struct relay_session *session = conn->session; |
6d805429 | 1689 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1690 | struct lttcomm_relayd_generic_reply reply; |
1691 | struct relay_stream *stream; | |
1692 | int ret; | |
c8f59ee5 DG |
1693 | uint64_t last_net_seq_num, stream_id; |
1694 | ||
6d805429 | 1695 | DBG("Data pending command received"); |
c8f59ee5 | 1696 | |
58eb9381 | 1697 | if (!session || conn->version_check_done == 0) { |
c8f59ee5 DG |
1698 | ERR("Trying to check for data before version check"); |
1699 | ret = -1; | |
1700 | goto end_no_session; | |
1701 | } | |
1702 | ||
58eb9381 | 1703 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1704 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1705 | if (ret == 0) { |
1706 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1707 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1708 | } else { |
1709 | ERR("Relay didn't receive valid data_pending struct size : %d", | |
1710 | ret); | |
1711 | } | |
c8f59ee5 DG |
1712 | ret = -1; |
1713 | goto end_no_session; | |
1714 | } | |
1715 | ||
1716 | stream_id = be64toh(msg.stream_id); | |
1717 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1718 | ||
7591bab1 | 1719 | stream = stream_get_by_id(stream_id); |
de91f48a | 1720 | if (stream == NULL) { |
c8f59ee5 | 1721 | ret = -1; |
7591bab1 | 1722 | goto end; |
c8f59ee5 DG |
1723 | } |
1724 | ||
7591bab1 MD |
1725 | pthread_mutex_lock(&stream->lock); |
1726 | ||
6d805429 | 1727 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1728 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1729 | last_net_seq_num); | |
1730 | ||
33832e64 | 1731 | /* Avoid wrapping issue */ |
39df6d9f | 1732 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) >= 0) { |
6d805429 | 1733 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1734 | ret = 0; |
6d805429 DG |
1735 | } else { |
1736 | /* Data still being streamed thus pending */ | |
1737 | ret = 1; | |
c8f59ee5 DG |
1738 | } |
1739 | ||
7591bab1 MD |
1740 | stream->data_pending_check_done = true; |
1741 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 1742 | |
7591bab1 MD |
1743 | stream_put(stream); |
1744 | end: | |
c8f59ee5 | 1745 | |
53efb85a | 1746 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1747 | reply.ret_code = htobe32(ret); |
58eb9381 | 1748 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1749 | if (ret < 0) { |
6d805429 | 1750 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1751 | } |
1752 | ||
1753 | end_no_session: | |
1754 | return ret; | |
1755 | } | |
1756 | ||
1757 | /* | |
1758 | * Wait for the control socket to reach a quiescent state. | |
1759 | * | |
7591bab1 MD |
1760 | * Note that for now, when receiving this command from the session |
1761 | * daemon, this means that every subsequent commands or data received on | |
1762 | * the control socket has been handled. So, this is why we simply return | |
1763 | * OK here. | |
c8f59ee5 | 1764 | */ |
7591bab1 | 1765 | static int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1766 | struct relay_connection *conn) |
c8f59ee5 DG |
1767 | { |
1768 | int ret; | |
ad7051c0 DG |
1769 | uint64_t stream_id; |
1770 | struct relay_stream *stream; | |
ad7051c0 | 1771 | struct lttcomm_relayd_quiescent_control msg; |
c8f59ee5 DG |
1772 | struct lttcomm_relayd_generic_reply reply; |
1773 | ||
1774 | DBG("Checking quiescent state on control socket"); | |
1775 | ||
58eb9381 | 1776 | if (!conn->session || conn->version_check_done == 0) { |
ad7051c0 DG |
1777 | ERR("Trying to check for data before version check"); |
1778 | ret = -1; | |
1779 | goto end_no_session; | |
1780 | } | |
1781 | ||
58eb9381 | 1782 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
ad7051c0 | 1783 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1784 | if (ret == 0) { |
1785 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1786 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1787 | } else { |
1788 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1789 | ret); | |
1790 | } | |
ad7051c0 DG |
1791 | ret = -1; |
1792 | goto end_no_session; | |
1793 | } | |
1794 | ||
1795 | stream_id = be64toh(msg.stream_id); | |
7591bab1 MD |
1796 | stream = stream_get_by_id(stream_id); |
1797 | if (!stream) { | |
1798 | goto reply; | |
1799 | } | |
1800 | pthread_mutex_lock(&stream->lock); | |
1801 | stream->data_pending_check_done = true; | |
1802 | pthread_mutex_unlock(&stream->lock); | |
1803 | DBG("Relay quiescent control pending flag set to %" PRIu64, stream_id); | |
1804 | stream_put(stream); | |
1805 | reply: | |
53efb85a | 1806 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1807 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 1808 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1809 | if (ret < 0) { |
6d805429 | 1810 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1811 | } |
1812 | ||
ad7051c0 | 1813 | end_no_session: |
c8f59ee5 DG |
1814 | return ret; |
1815 | } | |
1816 | ||
f7079f67 | 1817 | /* |
7591bab1 MD |
1818 | * Initialize a data pending command. This means that a consumer is about |
1819 | * to ask for data pending for each stream it holds. Simply iterate over | |
1820 | * all streams of a session and set the data_pending_check_done flag. | |
f7079f67 DG |
1821 | * |
1822 | * This command returns to the client a LTTNG_OK code. | |
1823 | */ | |
7591bab1 | 1824 | static int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1825 | struct relay_connection *conn) |
f7079f67 DG |
1826 | { |
1827 | int ret; | |
1828 | struct lttng_ht_iter iter; | |
1829 | struct lttcomm_relayd_begin_data_pending msg; | |
1830 | struct lttcomm_relayd_generic_reply reply; | |
1831 | struct relay_stream *stream; | |
1832 | uint64_t session_id; | |
1833 | ||
1834 | assert(recv_hdr); | |
58eb9381 | 1835 | assert(conn); |
f7079f67 DG |
1836 | |
1837 | DBG("Init streams for data pending"); | |
1838 | ||
58eb9381 | 1839 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1840 | ERR("Trying to check for data before version check"); |
1841 | ret = -1; | |
1842 | goto end_no_session; | |
1843 | } | |
1844 | ||
58eb9381 | 1845 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1846 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1847 | if (ret == 0) { |
1848 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1849 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1850 | } else { |
1851 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1852 | ret); | |
1853 | } | |
f7079f67 DG |
1854 | ret = -1; |
1855 | goto end_no_session; | |
1856 | } | |
1857 | ||
1858 | session_id = be64toh(msg.session_id); | |
1859 | ||
1860 | /* | |
7591bab1 MD |
1861 | * Iterate over all streams to set the begin data pending flag. |
1862 | * For now, the streams are indexed by stream handle so we have | |
1863 | * to iterate over all streams to find the one associated with | |
1864 | * the right session_id. | |
f7079f67 DG |
1865 | */ |
1866 | rcu_read_lock(); | |
d3e2ba59 | 1867 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1868 | node.node) { |
7591bab1 MD |
1869 | if (!stream_get(stream)) { |
1870 | continue; | |
1871 | } | |
1872 | if (stream->trace->session->id == session_id) { | |
1873 | pthread_mutex_lock(&stream->lock); | |
1874 | stream->data_pending_check_done = false; | |
1875 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 DG |
1876 | DBG("Set begin data pending flag to stream %" PRIu64, |
1877 | stream->stream_handle); | |
1878 | } | |
7591bab1 | 1879 | stream_put(stream); |
f7079f67 DG |
1880 | } |
1881 | rcu_read_unlock(); | |
1882 | ||
53efb85a | 1883 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1884 | /* All good, send back reply. */ |
1885 | reply.ret_code = htobe32(LTTNG_OK); | |
1886 | ||
58eb9381 | 1887 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1888 | if (ret < 0) { |
1889 | ERR("Relay begin data pending send reply failed"); | |
1890 | } | |
1891 | ||
1892 | end_no_session: | |
1893 | return ret; | |
1894 | } | |
1895 | ||
1896 | /* | |
7591bab1 MD |
1897 | * End data pending command. This will check, for a given session id, if |
1898 | * each stream associated with it has its data_pending_check_done flag | |
1899 | * set. If not, this means that the client lost track of the stream but | |
1900 | * the data is still being streamed on our side. In this case, we inform | |
1901 | * the client that data is in flight. | |
f7079f67 DG |
1902 | * |
1903 | * Return to the client if there is data in flight or not with a ret_code. | |
1904 | */ | |
7591bab1 | 1905 | static int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1906 | struct relay_connection *conn) |
f7079f67 DG |
1907 | { |
1908 | int ret; | |
1909 | struct lttng_ht_iter iter; | |
1910 | struct lttcomm_relayd_end_data_pending msg; | |
1911 | struct lttcomm_relayd_generic_reply reply; | |
1912 | struct relay_stream *stream; | |
1913 | uint64_t session_id; | |
1914 | uint32_t is_data_inflight = 0; | |
1915 | ||
f7079f67 DG |
1916 | DBG("End data pending command"); |
1917 | ||
58eb9381 | 1918 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1919 | ERR("Trying to check for data before version check"); |
1920 | ret = -1; | |
1921 | goto end_no_session; | |
1922 | } | |
1923 | ||
58eb9381 | 1924 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1925 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1926 | if (ret == 0) { |
1927 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1928 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1929 | } else { |
1930 | ERR("Relay didn't receive valid end data_pending struct size: %d", | |
1931 | ret); | |
1932 | } | |
f7079f67 DG |
1933 | ret = -1; |
1934 | goto end_no_session; | |
1935 | } | |
1936 | ||
1937 | session_id = be64toh(msg.session_id); | |
1938 | ||
7591bab1 MD |
1939 | /* |
1940 | * Iterate over all streams to see if the begin data pending | |
1941 | * flag is set. | |
1942 | */ | |
f7079f67 | 1943 | rcu_read_lock(); |
d3e2ba59 | 1944 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1945 | node.node) { |
7591bab1 MD |
1946 | if (!stream_get(stream)) { |
1947 | continue; | |
1948 | } | |
1949 | if (stream->trace->session->id != session_id) { | |
1950 | stream_put(stream); | |
1951 | continue; | |
1952 | } | |
1953 | pthread_mutex_lock(&stream->lock); | |
1954 | if (!stream->data_pending_check_done) { | |
1955 | if (!stream->closed || !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
1956 | is_data_inflight = 1; | |
1957 | DBG("Data is still in flight for stream %" PRIu64, | |
1958 | stream->stream_handle); | |
1959 | pthread_mutex_unlock(&stream->lock); | |
1960 | stream_put(stream); | |
1961 | break; | |
1962 | } | |
f7079f67 | 1963 | } |
7591bab1 MD |
1964 | pthread_mutex_unlock(&stream->lock); |
1965 | stream_put(stream); | |
f7079f67 DG |
1966 | } |
1967 | rcu_read_unlock(); | |
1968 | ||
53efb85a | 1969 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1970 | /* All good, send back reply. */ |
1971 | reply.ret_code = htobe32(is_data_inflight); | |
1972 | ||
58eb9381 | 1973 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1974 | if (ret < 0) { |
1975 | ERR("Relay end data pending send reply failed"); | |
1976 | } | |
1977 | ||
1978 | end_no_session: | |
1979 | return ret; | |
1980 | } | |
1981 | ||
1c20f0e2 JD |
1982 | /* |
1983 | * Receive an index for a specific stream. | |
1984 | * | |
1985 | * Return 0 on success else a negative value. | |
1986 | */ | |
7591bab1 | 1987 | static int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1988 | struct relay_connection *conn) |
1c20f0e2 | 1989 | { |
7591bab1 | 1990 | int ret, send_ret; |
58eb9381 | 1991 | struct relay_session *session = conn->session; |
1c20f0e2 | 1992 | struct lttcomm_relayd_index index_info; |
7591bab1 | 1993 | struct relay_index *index; |
1c20f0e2 JD |
1994 | struct lttcomm_relayd_generic_reply reply; |
1995 | struct relay_stream *stream; | |
1996 | uint64_t net_seq_num; | |
f8f3885c | 1997 | size_t msg_len; |
1c20f0e2 | 1998 | |
58eb9381 | 1999 | assert(conn); |
1c20f0e2 JD |
2000 | |
2001 | DBG("Relay receiving index"); | |
2002 | ||
58eb9381 | 2003 | if (!session || conn->version_check_done == 0) { |
1c20f0e2 JD |
2004 | ERR("Trying to close a stream before version check"); |
2005 | ret = -1; | |
2006 | goto end_no_session; | |
2007 | } | |
2008 | ||
f8f3885c MD |
2009 | msg_len = lttcomm_relayd_index_len( |
2010 | lttng_to_index_major(conn->major, conn->minor), | |
2011 | lttng_to_index_minor(conn->major, conn->minor)); | |
58eb9381 | 2012 | ret = conn->sock->ops->recvmsg(conn->sock, &index_info, |
f8f3885c MD |
2013 | msg_len, 0); |
2014 | if (ret < msg_len) { | |
1c20f0e2 JD |
2015 | if (ret == 0) { |
2016 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2017 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
1c20f0e2 JD |
2018 | } else { |
2019 | ERR("Relay didn't receive valid index struct size : %d", ret); | |
2020 | } | |
2021 | ret = -1; | |
2022 | goto end_no_session; | |
2023 | } | |
2024 | ||
2025 | net_seq_num = be64toh(index_info.net_seq_num); | |
2026 | ||
7591bab1 | 2027 | stream = stream_get_by_id(be64toh(index_info.relay_stream_id)); |
1c20f0e2 | 2028 | if (!stream) { |
7591bab1 | 2029 | ERR("stream_get_by_id not found"); |
1c20f0e2 | 2030 | ret = -1; |
7591bab1 | 2031 | goto end; |
1c20f0e2 | 2032 | } |
7591bab1 | 2033 | pthread_mutex_lock(&stream->lock); |
1c20f0e2 | 2034 | |
d3e2ba59 JD |
2035 | /* Live beacon handling */ |
2036 | if (index_info.packet_size == 0) { | |
7591bab1 MD |
2037 | DBG("Received live beacon for stream %" PRIu64, |
2038 | stream->stream_handle); | |
d3e2ba59 JD |
2039 | |
2040 | /* | |
7591bab1 MD |
2041 | * Only flag a stream inactive when it has already |
2042 | * received data and no indexes are in flight. | |
d3e2ba59 | 2043 | */ |
a44ca2ca | 2044 | if (stream->index_received_seqcount > 0 |
7591bab1 MD |
2045 | && stream->indexes_in_flight == 0) { |
2046 | stream->beacon_ts_end = | |
2047 | be64toh(index_info.timestamp_end); | |
d3e2ba59 JD |
2048 | } |
2049 | ret = 0; | |
7591bab1 | 2050 | goto end_stream_put; |
d3e2ba59 JD |
2051 | } else { |
2052 | stream->beacon_ts_end = -1ULL; | |
2053 | } | |
2054 | ||
528f2ffa JD |
2055 | if (stream->ctf_stream_id == -1ULL) { |
2056 | stream->ctf_stream_id = be64toh(index_info.stream_id); | |
2057 | } | |
7591bab1 MD |
2058 | index = relay_index_get_by_id_or_create(stream, net_seq_num); |
2059 | if (!index) { | |
2060 | ret = -1; | |
2061 | ERR("relay_index_get_by_id_or_create index NULL"); | |
2062 | goto end_stream_put; | |
1c20f0e2 | 2063 | } |
234cd636 | 2064 | if (set_index_control_data(index, &index_info, conn)) { |
7591bab1 MD |
2065 | ERR("set_index_control_data error"); |
2066 | relay_index_put(index); | |
2067 | ret = -1; | |
2068 | goto end_stream_put; | |
2069 | } | |
2070 | ret = relay_index_try_flush(index); | |
2071 | if (ret == 0) { | |
a44ca2ca MD |
2072 | tracefile_array_commit_seq(stream->tfa); |
2073 | stream->index_received_seqcount++; | |
7591bab1 MD |
2074 | } else if (ret > 0) { |
2075 | /* no flush. */ | |
2076 | ret = 0; | |
2077 | } else { | |
a86c0657 JR |
2078 | /* |
2079 | * ret < 0 | |
2080 | * | |
2081 | * relay_index_try_flush is responsible for the self-reference | |
2082 | * put of the index object on error. | |
2083 | */ | |
7591bab1 | 2084 | ERR("relay_index_try_flush error %d", ret); |
7591bab1 | 2085 | ret = -1; |
1c20f0e2 JD |
2086 | } |
2087 | ||
7591bab1 MD |
2088 | end_stream_put: |
2089 | pthread_mutex_unlock(&stream->lock); | |
2090 | stream_put(stream); | |
2091 | ||
2092 | end: | |
1c20f0e2 | 2093 | |
53efb85a | 2094 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
2095 | if (ret < 0) { |
2096 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
2097 | } else { | |
2098 | reply.ret_code = htobe32(LTTNG_OK); | |
2099 | } | |
58eb9381 | 2100 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1c20f0e2 JD |
2101 | if (send_ret < 0) { |
2102 | ERR("Relay sending close index id reply"); | |
2103 | ret = send_ret; | |
2104 | } | |
2105 | ||
2106 | end_no_session: | |
2107 | return ret; | |
2108 | } | |
2109 | ||
a4baae1b JD |
2110 | /* |
2111 | * Receive the streams_sent message. | |
2112 | * | |
2113 | * Return 0 on success else a negative value. | |
2114 | */ | |
7591bab1 | 2115 | static int relay_streams_sent(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 2116 | struct relay_connection *conn) |
a4baae1b JD |
2117 | { |
2118 | int ret, send_ret; | |
2119 | struct lttcomm_relayd_generic_reply reply; | |
2120 | ||
58eb9381 | 2121 | assert(conn); |
a4baae1b JD |
2122 | |
2123 | DBG("Relay receiving streams_sent"); | |
2124 | ||
58eb9381 | 2125 | if (!conn->session || conn->version_check_done == 0) { |
a4baae1b JD |
2126 | ERR("Trying to close a stream before version check"); |
2127 | ret = -1; | |
2128 | goto end_no_session; | |
2129 | } | |
2130 | ||
2131 | /* | |
7591bab1 MD |
2132 | * Publish every pending stream in the connection recv list which are |
2133 | * now ready to be used by the viewer. | |
4a9daf17 | 2134 | */ |
7591bab1 | 2135 | publish_connection_local_streams(conn); |
4a9daf17 | 2136 | |
53efb85a | 2137 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2138 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2139 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
a4baae1b JD |
2140 | if (send_ret < 0) { |
2141 | ERR("Relay sending sent_stream reply"); | |
2142 | ret = send_ret; | |
2143 | } else { | |
2144 | /* Success. */ | |
2145 | ret = 0; | |
2146 | } | |
2147 | ||
2148 | end_no_session: | |
2149 | return ret; | |
2150 | } | |
2151 | ||
b8aa1682 | 2152 | /* |
d3e2ba59 | 2153 | * Process the commands received on the control socket |
b8aa1682 | 2154 | */ |
7591bab1 | 2155 | static int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 2156 | struct relay_connection *conn) |
b8aa1682 JD |
2157 | { |
2158 | int ret = 0; | |
2159 | ||
2160 | switch (be32toh(recv_hdr->cmd)) { | |
b8aa1682 | 2161 | case RELAYD_CREATE_SESSION: |
58eb9381 | 2162 | ret = relay_create_session(recv_hdr, conn); |
b8aa1682 | 2163 | break; |
b8aa1682 | 2164 | case RELAYD_ADD_STREAM: |
58eb9381 | 2165 | ret = relay_add_stream(recv_hdr, conn); |
b8aa1682 JD |
2166 | break; |
2167 | case RELAYD_START_DATA: | |
58eb9381 | 2168 | ret = relay_start(recv_hdr, conn); |
b8aa1682 JD |
2169 | break; |
2170 | case RELAYD_SEND_METADATA: | |
58eb9381 | 2171 | ret = relay_recv_metadata(recv_hdr, conn); |
b8aa1682 JD |
2172 | break; |
2173 | case RELAYD_VERSION: | |
58eb9381 | 2174 | ret = relay_send_version(recv_hdr, conn); |
b8aa1682 | 2175 | break; |
173af62f | 2176 | case RELAYD_CLOSE_STREAM: |
58eb9381 | 2177 | ret = relay_close_stream(recv_hdr, conn); |
173af62f | 2178 | break; |
6d805429 | 2179 | case RELAYD_DATA_PENDING: |
58eb9381 | 2180 | ret = relay_data_pending(recv_hdr, conn); |
c8f59ee5 DG |
2181 | break; |
2182 | case RELAYD_QUIESCENT_CONTROL: | |
58eb9381 | 2183 | ret = relay_quiescent_control(recv_hdr, conn); |
c8f59ee5 | 2184 | break; |
f7079f67 | 2185 | case RELAYD_BEGIN_DATA_PENDING: |
58eb9381 | 2186 | ret = relay_begin_data_pending(recv_hdr, conn); |
f7079f67 DG |
2187 | break; |
2188 | case RELAYD_END_DATA_PENDING: | |
58eb9381 | 2189 | ret = relay_end_data_pending(recv_hdr, conn); |
f7079f67 | 2190 | break; |
1c20f0e2 | 2191 | case RELAYD_SEND_INDEX: |
58eb9381 | 2192 | ret = relay_recv_index(recv_hdr, conn); |
1c20f0e2 | 2193 | break; |
a4baae1b | 2194 | case RELAYD_STREAMS_SENT: |
58eb9381 | 2195 | ret = relay_streams_sent(recv_hdr, conn); |
a4baae1b | 2196 | break; |
93ec662e JD |
2197 | case RELAYD_RESET_METADATA: |
2198 | ret = relay_reset_metadata(recv_hdr, conn); | |
2199 | break; | |
b8aa1682 JD |
2200 | case RELAYD_UPDATE_SYNC_INFO: |
2201 | default: | |
2202 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
58eb9381 | 2203 | relay_unknown_command(conn); |
b8aa1682 JD |
2204 | ret = -1; |
2205 | goto end; | |
2206 | } | |
2207 | ||
2208 | end: | |
2209 | return ret; | |
2210 | } | |
2211 | ||
7d2f7452 DG |
2212 | /* |
2213 | * Handle index for a data stream. | |
2214 | * | |
7591bab1 | 2215 | * Called with the stream lock held. |
7d2f7452 DG |
2216 | * |
2217 | * Return 0 on success else a negative value. | |
2218 | */ | |
2219 | static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num, | |
2220 | int rotate_index) | |
2221 | { | |
7591bab1 MD |
2222 | int ret = 0; |
2223 | uint64_t data_offset; | |
2224 | struct relay_index *index; | |
7d2f7452 | 2225 | |
7d2f7452 DG |
2226 | /* Get data offset because we are about to update the index. */ |
2227 | data_offset = htobe64(stream->tracefile_size_current); | |
2228 | ||
65d66b19 MD |
2229 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, |
2230 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
7591bab1 | 2231 | |
7d2f7452 | 2232 | /* |
7591bab1 MD |
2233 | * Lookup for an existing index for that stream id/sequence |
2234 | * number. If it exists, the control thread has already received the | |
2235 | * data for it, thus we need to write it to disk. | |
7d2f7452 | 2236 | */ |
7591bab1 | 2237 | index = relay_index_get_by_id_or_create(stream, net_seq_num); |
7d2f7452 | 2238 | if (!index) { |
7591bab1 MD |
2239 | ret = -1; |
2240 | goto end; | |
7d2f7452 DG |
2241 | } |
2242 | ||
f8f3885c MD |
2243 | if (rotate_index || !stream->index_file) { |
2244 | uint32_t major, minor; | |
7591bab1 | 2245 | |
f8f3885c MD |
2246 | /* Put ref on previous index_file. */ |
2247 | if (stream->index_file) { | |
2248 | lttng_index_file_put(stream->index_file); | |
2249 | stream->index_file = NULL; | |
7d2f7452 | 2250 | } |
f8f3885c MD |
2251 | major = stream->trace->session->major; |
2252 | minor = stream->trace->session->minor; | |
2253 | stream->index_file = lttng_index_file_create(stream->path_name, | |
2254 | stream->channel_name, | |
7591bab1 | 2255 | -1, -1, stream->tracefile_size, |
f8f3885c MD |
2256 | tracefile_array_get_file_index_head(stream->tfa), |
2257 | lttng_to_index_major(major, minor), | |
2258 | lttng_to_index_minor(major, minor)); | |
2259 | if (!stream->index_file) { | |
7591bab1 MD |
2260 | ret = -1; |
2261 | /* Put self-ref for this index due to error. */ | |
2262 | relay_index_put(index); | |
f8f3885c | 2263 | index = NULL; |
7591bab1 | 2264 | goto end; |
7d2f7452 | 2265 | } |
7d2f7452 DG |
2266 | } |
2267 | ||
f8f3885c | 2268 | if (relay_index_set_file(index, stream->index_file, data_offset)) { |
7591bab1 MD |
2269 | ret = -1; |
2270 | /* Put self-ref for this index due to error. */ | |
2271 | relay_index_put(index); | |
f8f3885c | 2272 | index = NULL; |
7591bab1 | 2273 | goto end; |
7d2f7452 DG |
2274 | } |
2275 | ||
7591bab1 MD |
2276 | ret = relay_index_try_flush(index); |
2277 | if (ret == 0) { | |
a44ca2ca MD |
2278 | tracefile_array_commit_seq(stream->tfa); |
2279 | stream->index_received_seqcount++; | |
7591bab1 MD |
2280 | } else if (ret > 0) { |
2281 | /* No flush. */ | |
2282 | ret = 0; | |
2283 | } else { | |
a86c0657 JR |
2284 | /* |
2285 | * ret < 0 | |
2286 | * | |
2287 | * relay_index_try_flush is responsible for the self-reference | |
2288 | * put of the index object on error. | |
2289 | */ | |
2290 | ERR("relay_index_try_flush error %d", ret); | |
7591bab1 MD |
2291 | ret = -1; |
2292 | } | |
2293 | end: | |
7d2f7452 DG |
2294 | return ret; |
2295 | } | |
2296 | ||
b8aa1682 JD |
2297 | /* |
2298 | * relay_process_data: Process the data received on the data socket | |
2299 | */ | |
7591bab1 | 2300 | static int relay_process_data(struct relay_connection *conn) |
b8aa1682 | 2301 | { |
7d2f7452 | 2302 | int ret = 0, rotate_index = 0; |
6cd525e8 | 2303 | ssize_t size_ret; |
b8aa1682 JD |
2304 | struct relay_stream *stream; |
2305 | struct lttcomm_relayd_data_hdr data_hdr; | |
7d2f7452 | 2306 | uint64_t stream_id; |
173af62f | 2307 | uint64_t net_seq_num; |
b8aa1682 | 2308 | uint32_t data_size; |
2a174661 | 2309 | struct relay_session *session; |
bda7c7b9 | 2310 | bool new_stream = false, close_requested = false; |
0848dba7 MD |
2311 | size_t chunk_size = RECV_DATA_BUFFER_SIZE; |
2312 | size_t recv_off = 0; | |
2313 | char data_buffer[chunk_size]; | |
b8aa1682 | 2314 | |
58eb9381 | 2315 | ret = conn->sock->ops->recvmsg(conn->sock, &data_hdr, |
7c5aef62 | 2316 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 | 2317 | if (ret <= 0) { |
a6cd2b97 DG |
2318 | if (ret == 0) { |
2319 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2320 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 | 2321 | } else { |
58eb9381 | 2322 | ERR("Unable to receive data header on sock %d", conn->sock->fd); |
a6cd2b97 | 2323 | } |
b8aa1682 JD |
2324 | ret = -1; |
2325 | goto end; | |
2326 | } | |
2327 | ||
2328 | stream_id = be64toh(data_hdr.stream_id); | |
7591bab1 | 2329 | stream = stream_get_by_id(stream_id); |
b8aa1682 | 2330 | if (!stream) { |
65d66b19 | 2331 | ERR("relay_process_data: Cannot find stream %" PRIu64, stream_id); |
b8aa1682 | 2332 | ret = -1; |
7591bab1 | 2333 | goto end; |
b8aa1682 | 2334 | } |
7591bab1 | 2335 | session = stream->trace->session; |
b8aa1682 | 2336 | data_size = be32toh(data_hdr.data_size); |
b8aa1682 | 2337 | |
173af62f DG |
2338 | net_seq_num = be64toh(data_hdr.net_seq_num); |
2339 | ||
77c7c900 | 2340 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 2341 | data_size, stream_id, net_seq_num); |
b8aa1682 | 2342 | |
7591bab1 MD |
2343 | pthread_mutex_lock(&stream->lock); |
2344 | ||
1c20f0e2 | 2345 | /* Check if a rotation is needed. */ |
0f907de1 JD |
2346 | if (stream->tracefile_size > 0 && |
2347 | (stream->tracefile_size_current + data_size) > | |
2348 | stream->tracefile_size) { | |
a44ca2ca MD |
2349 | uint64_t old_id, new_id; |
2350 | ||
2351 | old_id = tracefile_array_get_file_index_head(stream->tfa); | |
2352 | tracefile_array_file_rotate(stream->tfa); | |
2353 | ||
2354 | /* new_id is updated by utils_rotate_stream_file. */ | |
2355 | new_id = old_id; | |
6b6b9a5a | 2356 | |
7591bab1 MD |
2357 | ret = utils_rotate_stream_file(stream->path_name, |
2358 | stream->channel_name, stream->tracefile_size, | |
2359 | stream->tracefile_count, -1, | |
2360 | -1, stream->stream_fd->fd, | |
a44ca2ca | 2361 | &new_id, &stream->stream_fd->fd); |
0f907de1 | 2362 | if (ret < 0) { |
1c20f0e2 | 2363 | ERR("Rotating stream output file"); |
7591bab1 MD |
2364 | goto end_stream_unlock; |
2365 | } | |
7591bab1 MD |
2366 | /* |
2367 | * Reset current size because we just performed a stream | |
2368 | * rotation. | |
2369 | */ | |
a6976990 | 2370 | stream->tracefile_size_current = 0; |
1c20f0e2 JD |
2371 | rotate_index = 1; |
2372 | } | |
2373 | ||
1c20f0e2 | 2374 | /* |
7591bab1 MD |
2375 | * Index are handled in protocol version 2.4 and above. Also, |
2376 | * snapshot and index are NOT supported. | |
1c20f0e2 | 2377 | */ |
2a174661 | 2378 | if (session->minor >= 4 && !session->snapshot) { |
7d2f7452 | 2379 | ret = handle_index_data(stream, net_seq_num, rotate_index); |
1c20f0e2 | 2380 | if (ret < 0) { |
65d66b19 MD |
2381 | ERR("handle_index_data: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
2382 | stream->stream_handle, net_seq_num, ret); | |
7591bab1 | 2383 | goto end_stream_unlock; |
1c20f0e2 | 2384 | } |
1c20f0e2 JD |
2385 | } |
2386 | ||
0848dba7 MD |
2387 | for (recv_off = 0; recv_off < data_size; recv_off += chunk_size) { |
2388 | size_t recv_size = min(data_size - recv_off, chunk_size); | |
1d4dfdef | 2389 | |
0848dba7 MD |
2390 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, recv_size, 0); |
2391 | if (ret <= 0) { | |
2392 | if (ret == 0) { | |
2393 | /* Orderly shutdown. Not necessary to print an error. */ | |
2394 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); | |
2395 | } else { | |
2396 | ERR("Socket %d error %d", conn->sock->fd, ret); | |
2397 | } | |
2398 | ret = -1; | |
2399 | goto end_stream_unlock; | |
2400 | } | |
2401 | ||
2402 | /* Write data to stream output fd. */ | |
2403 | size_ret = lttng_write(stream->stream_fd->fd, data_buffer, | |
2404 | recv_size); | |
2405 | if (size_ret < recv_size) { | |
2406 | ERR("Relay error writing data to file"); | |
2407 | ret = -1; | |
2408 | goto end_stream_unlock; | |
2409 | } | |
2410 | ||
2411 | DBG2("Relay wrote %zd bytes to tracefile for stream id %" PRIu64, | |
2412 | size_ret, stream->stream_handle); | |
2413 | } | |
5ab7344e | 2414 | |
7591bab1 MD |
2415 | ret = write_padding_to_file(stream->stream_fd->fd, |
2416 | be32toh(data_hdr.padding_size)); | |
1d4dfdef | 2417 | if (ret < 0) { |
65d66b19 MD |
2418 | ERR("write_padding_to_file: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
2419 | stream->stream_handle, net_seq_num, ret); | |
7591bab1 | 2420 | goto end_stream_unlock; |
1d4dfdef | 2421 | } |
7591bab1 MD |
2422 | stream->tracefile_size_current += |
2423 | data_size + be32toh(data_hdr.padding_size); | |
c0bae11d MD |
2424 | if (stream->prev_seq == -1ULL) { |
2425 | new_stream = true; | |
2426 | } | |
2427 | ||
173af62f DG |
2428 | stream->prev_seq = net_seq_num; |
2429 | ||
7591bab1 | 2430 | end_stream_unlock: |
bda7c7b9 | 2431 | close_requested = stream->close_requested; |
7591bab1 | 2432 | pthread_mutex_unlock(&stream->lock); |
bda7c7b9 JG |
2433 | if (close_requested) { |
2434 | try_stream_close(stream); | |
2435 | } | |
2436 | ||
c0bae11d MD |
2437 | if (new_stream) { |
2438 | pthread_mutex_lock(&session->lock); | |
2439 | uatomic_set(&session->new_streams, 1); | |
2440 | pthread_mutex_unlock(&session->lock); | |
2441 | } | |
7591bab1 | 2442 | stream_put(stream); |
b8aa1682 JD |
2443 | end: |
2444 | return ret; | |
2445 | } | |
2446 | ||
7591bab1 | 2447 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
2448 | { |
2449 | int ret; | |
2450 | ||
58eb9381 | 2451 | (void) lttng_poll_del(events, pollfd); |
b8aa1682 JD |
2452 | |
2453 | ret = close(pollfd); | |
2454 | if (ret < 0) { | |
2455 | ERR("Closing pollfd %d", pollfd); | |
2456 | } | |
2457 | } | |
2458 | ||
7591bab1 MD |
2459 | static void relay_thread_close_connection(struct lttng_poll_event *events, |
2460 | int pollfd, struct relay_connection *conn) | |
9d1bbf21 | 2461 | { |
7591bab1 | 2462 | const char *type_str; |
2a174661 | 2463 | |
7591bab1 MD |
2464 | switch (conn->type) { |
2465 | case RELAY_DATA: | |
2466 | type_str = "Data"; | |
2467 | break; | |
2468 | case RELAY_CONTROL: | |
2469 | type_str = "Control"; | |
2470 | break; | |
2471 | case RELAY_VIEWER_COMMAND: | |
2472 | type_str = "Viewer Command"; | |
2473 | break; | |
2474 | case RELAY_VIEWER_NOTIFICATION: | |
2475 | type_str = "Viewer Notification"; | |
2476 | break; | |
2477 | default: | |
2478 | type_str = "Unknown"; | |
9d1bbf21 | 2479 | } |
7591bab1 MD |
2480 | cleanup_connection_pollfd(events, pollfd); |
2481 | connection_put(conn); | |
2482 | DBG("%s connection closed with %d", type_str, pollfd); | |
b8aa1682 JD |
2483 | } |
2484 | ||
2485 | /* | |
2486 | * This thread does the actual work | |
2487 | */ | |
7591bab1 | 2488 | static void *relay_thread_worker(void *data) |
b8aa1682 | 2489 | { |
beaad64c DG |
2490 | int ret, err = -1, last_seen_data_fd = -1; |
2491 | uint32_t nb_fd; | |
b8aa1682 JD |
2492 | struct lttng_poll_event events; |
2493 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 2494 | struct lttng_ht_iter iter; |
b8aa1682 | 2495 | struct lttcomm_relayd_hdr recv_hdr; |
90e7d72f | 2496 | struct relay_connection *destroy_conn = NULL; |
b8aa1682 JD |
2497 | |
2498 | DBG("[thread] Relay worker started"); | |
2499 | ||
9d1bbf21 MD |
2500 | rcu_register_thread(); |
2501 | ||
55706a7d MD |
2502 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
2503 | ||
9b5e0863 MD |
2504 | if (testpoint(relayd_thread_worker)) { |
2505 | goto error_testpoint; | |
2506 | } | |
2507 | ||
f385ae0a MD |
2508 | health_code_update(); |
2509 | ||
b8aa1682 JD |
2510 | /* table of connections indexed on socket */ |
2511 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2512 | if (!relay_connections_ht) { |
2513 | goto relay_connections_ht_error; | |
2514 | } | |
b8aa1682 | 2515 | |
b8aa1682 JD |
2516 | ret = create_thread_poll_set(&events, 2); |
2517 | if (ret < 0) { | |
2518 | goto error_poll_create; | |
2519 | } | |
2520 | ||
58eb9381 | 2521 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
2522 | if (ret < 0) { |
2523 | goto error; | |
2524 | } | |
2525 | ||
beaad64c | 2526 | restart: |
b8aa1682 | 2527 | while (1) { |
beaad64c DG |
2528 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2529 | ||
f385ae0a MD |
2530 | health_code_update(); |
2531 | ||
b8aa1682 | 2532 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2533 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 2534 | health_poll_entry(); |
b8aa1682 | 2535 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 2536 | health_poll_exit(); |
b8aa1682 JD |
2537 | if (ret < 0) { |
2538 | /* | |
2539 | * Restart interrupted system call. | |
2540 | */ | |
2541 | if (errno == EINTR) { | |
2542 | goto restart; | |
2543 | } | |
2544 | goto error; | |
2545 | } | |
2546 | ||
0d9c5d77 DG |
2547 | nb_fd = ret; |
2548 | ||
beaad64c | 2549 | /* |
7591bab1 MD |
2550 | * Process control. The control connection is |
2551 | * prioritized so we don't starve it with high | |
2552 | * throughput tracing data on the data connection. | |
beaad64c | 2553 | */ |
b8aa1682 JD |
2554 | for (i = 0; i < nb_fd; i++) { |
2555 | /* Fetch once the poll data */ | |
beaad64c DG |
2556 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2557 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 2558 | |
f385ae0a MD |
2559 | health_code_update(); |
2560 | ||
fd20dac9 | 2561 | if (!revents) { |
7591bab1 MD |
2562 | /* |
2563 | * No activity for this FD (poll | |
2564 | * implementation). | |
2565 | */ | |
fd20dac9 MD |
2566 | continue; |
2567 | } | |
2568 | ||
b8aa1682 JD |
2569 | /* Thread quit pipe has been closed. Killing thread. */ |
2570 | ret = check_thread_quit_pipe(pollfd, revents); | |
2571 | if (ret) { | |
095a4ae5 MD |
2572 | err = 0; |
2573 | goto exit; | |
b8aa1682 JD |
2574 | } |
2575 | ||
58eb9381 DG |
2576 | /* Inspect the relay conn pipe for new connection */ |
2577 | if (pollfd == relay_conn_pipe[0]) { | |
03e43155 | 2578 | if (revents & LPOLLIN) { |
90e7d72f JG |
2579 | struct relay_connection *conn; |
2580 | ||
58eb9381 | 2581 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
2582 | if (ret < 0) { |
2583 | goto error; | |
2584 | } | |
58eb9381 DG |
2585 | lttng_poll_add(&events, conn->sock->fd, |
2586 | LPOLLIN | LPOLLRDHUP); | |
7591bab1 | 2587 | connection_ht_add(relay_connections_ht, conn); |
58eb9381 | 2588 | DBG("Connection socket %d added", conn->sock->fd); |
03e43155 MD |
2589 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2590 | ERR("Relay connection pipe error"); | |
2591 | goto error; | |
2592 | } else { | |
2593 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2594 | goto error; | |
b8aa1682 | 2595 | } |
58eb9381 | 2596 | } else { |
90e7d72f JG |
2597 | struct relay_connection *ctrl_conn; |
2598 | ||
7591bab1 | 2599 | ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
58eb9381 | 2600 | /* If not found, there is a synchronization issue. */ |
90e7d72f | 2601 | assert(ctrl_conn); |
58eb9381 | 2602 | |
03e43155 MD |
2603 | if (ctrl_conn->type == RELAY_DATA) { |
2604 | if (revents & LPOLLIN) { | |
beaad64c DG |
2605 | /* |
2606 | * Flag the last seen data fd not deleted. It will be | |
2607 | * used as the last seen fd if any fd gets deleted in | |
2608 | * this first loop. | |
2609 | */ | |
2610 | last_notdel_data_fd = pollfd; | |
2611 | } | |
03e43155 MD |
2612 | goto put_ctrl_connection; |
2613 | } | |
2614 | assert(ctrl_conn->type == RELAY_CONTROL); | |
2615 | ||
2616 | if (revents & LPOLLIN) { | |
2617 | ret = ctrl_conn->sock->ops->recvmsg(ctrl_conn->sock, | |
2618 | &recv_hdr, sizeof(recv_hdr), 0); | |
2619 | if (ret <= 0) { | |
2620 | /* Connection closed */ | |
2621 | relay_thread_close_connection(&events, pollfd, | |
2622 | ctrl_conn); | |
2623 | } else { | |
2624 | ret = relay_process_control(&recv_hdr, ctrl_conn); | |
2625 | if (ret < 0) { | |
2626 | /* Clear the session on error. */ | |
2627 | relay_thread_close_connection(&events, | |
2628 | pollfd, ctrl_conn); | |
2629 | } | |
2630 | seen_control = 1; | |
2631 | } | |
2632 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2633 | relay_thread_close_connection(&events, | |
2634 | pollfd, ctrl_conn); | |
2635 | if (last_seen_data_fd == pollfd) { | |
2636 | last_seen_data_fd = last_notdel_data_fd; | |
2637 | } | |
58eb9381 | 2638 | } else { |
03e43155 MD |
2639 | ERR("Unexpected poll events %u for control sock %d", |
2640 | revents, pollfd); | |
2641 | connection_put(ctrl_conn); | |
2642 | goto error; | |
beaad64c | 2643 | } |
03e43155 | 2644 | put_ctrl_connection: |
7591bab1 | 2645 | connection_put(ctrl_conn); |
beaad64c DG |
2646 | } |
2647 | } | |
2648 | ||
2649 | /* | |
2650 | * The last loop handled a control request, go back to poll to make | |
2651 | * sure we prioritise the control socket. | |
2652 | */ | |
2653 | if (seen_control) { | |
2654 | continue; | |
2655 | } | |
2656 | ||
2657 | if (last_seen_data_fd >= 0) { | |
2658 | for (i = 0; i < nb_fd; i++) { | |
2659 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
2660 | |
2661 | health_code_update(); | |
2662 | ||
beaad64c DG |
2663 | if (last_seen_data_fd == pollfd) { |
2664 | idx = i; | |
2665 | break; | |
2666 | } | |
2667 | } | |
2668 | } | |
2669 | ||
2670 | /* Process data connection. */ | |
2671 | for (i = idx + 1; i < nb_fd; i++) { | |
2672 | /* Fetch the poll data. */ | |
2673 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2674 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
90e7d72f | 2675 | struct relay_connection *data_conn; |
beaad64c | 2676 | |
f385ae0a MD |
2677 | health_code_update(); |
2678 | ||
fd20dac9 MD |
2679 | if (!revents) { |
2680 | /* No activity for this FD (poll implementation). */ | |
2681 | continue; | |
2682 | } | |
2683 | ||
beaad64c | 2684 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 2685 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
2686 | continue; |
2687 | } | |
2688 | ||
7591bab1 | 2689 | data_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
90e7d72f | 2690 | if (!data_conn) { |
fd20dac9 | 2691 | /* Skip it. Might be removed before. */ |
fd20dac9 MD |
2692 | continue; |
2693 | } | |
03e43155 MD |
2694 | if (data_conn->type == RELAY_CONTROL) { |
2695 | goto put_data_connection; | |
2696 | } | |
2697 | assert(data_conn->type == RELAY_DATA); | |
fd20dac9 MD |
2698 | |
2699 | if (revents & LPOLLIN) { | |
90e7d72f | 2700 | ret = relay_process_data(data_conn); |
fd20dac9 MD |
2701 | /* Connection closed */ |
2702 | if (ret < 0) { | |
7591bab1 | 2703 | relay_thread_close_connection(&events, pollfd, |
03e43155 | 2704 | data_conn); |
fd20dac9 MD |
2705 | /* |
2706 | * Every goto restart call sets the last seen fd where | |
2707 | * here we don't really care since we gracefully | |
2708 | * continue the loop after the connection is deleted. | |
2709 | */ | |
2710 | } else { | |
2711 | /* Keep last seen port. */ | |
2712 | last_seen_data_fd = pollfd; | |
7591bab1 | 2713 | connection_put(data_conn); |
fd20dac9 | 2714 | goto restart; |
b8aa1682 | 2715 | } |
03e43155 MD |
2716 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2717 | relay_thread_close_connection(&events, pollfd, | |
2718 | data_conn); | |
2719 | } else { | |
2720 | ERR("Unknown poll events %u for data sock %d", | |
2721 | revents, pollfd); | |
b8aa1682 | 2722 | } |
03e43155 | 2723 | put_data_connection: |
7591bab1 | 2724 | connection_put(data_conn); |
b8aa1682 | 2725 | } |
beaad64c | 2726 | last_seen_data_fd = -1; |
b8aa1682 JD |
2727 | } |
2728 | ||
f385ae0a MD |
2729 | /* Normal exit, no error */ |
2730 | ret = 0; | |
2731 | ||
095a4ae5 | 2732 | exit: |
b8aa1682 | 2733 | error: |
58eb9381 | 2734 | /* Cleanup reamaining connection object. */ |
9d1bbf21 | 2735 | rcu_read_lock(); |
90e7d72f JG |
2736 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, |
2737 | destroy_conn, | |
58eb9381 | 2738 | sock_n.node) { |
f385ae0a | 2739 | health_code_update(); |
98ba050e JR |
2740 | |
2741 | if (session_abort(destroy_conn->session)) { | |
2742 | assert(0); | |
2743 | } | |
2744 | ||
7591bab1 MD |
2745 | /* |
2746 | * No need to grab another ref, because we own | |
2747 | * destroy_conn. | |
2748 | */ | |
2749 | relay_thread_close_connection(&events, destroy_conn->sock->fd, | |
2750 | destroy_conn); | |
b8aa1682 | 2751 | } |
94d49140 | 2752 | rcu_read_unlock(); |
7591bab1 MD |
2753 | |
2754 | lttng_poll_clean(&events); | |
7d2f7452 | 2755 | error_poll_create: |
b8aa1682 | 2756 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 2757 | relay_connections_ht_error: |
58eb9381 DG |
2758 | /* Close relay conn pipes */ |
2759 | utils_close_pipe(relay_conn_pipe); | |
095a4ae5 MD |
2760 | if (err) { |
2761 | DBG("Thread exited with error"); | |
2762 | } | |
b8aa1682 | 2763 | DBG("Worker thread cleanup complete"); |
9b5e0863 | 2764 | error_testpoint: |
f385ae0a MD |
2765 | if (err) { |
2766 | health_error(); | |
2767 | ERR("Health error occurred in %s", __func__); | |
2768 | } | |
2769 | health_unregister(health_relayd); | |
9d1bbf21 | 2770 | rcu_unregister_thread(); |
b4aacfdc | 2771 | lttng_relay_stop_threads(); |
b8aa1682 JD |
2772 | return NULL; |
2773 | } | |
2774 | ||
2775 | /* | |
2776 | * Create the relay command pipe to wake thread_manage_apps. | |
2777 | * Closed in cleanup(). | |
2778 | */ | |
58eb9381 | 2779 | static int create_relay_conn_pipe(void) |
b8aa1682 | 2780 | { |
a02de639 | 2781 | int ret; |
b8aa1682 | 2782 | |
58eb9381 | 2783 | ret = utils_create_pipe_cloexec(relay_conn_pipe); |
b8aa1682 | 2784 | |
b8aa1682 JD |
2785 | return ret; |
2786 | } | |
2787 | ||
2788 | /* | |
2789 | * main | |
2790 | */ | |
2791 | int main(int argc, char **argv) | |
2792 | { | |
178a0557 | 2793 | int ret = 0, retval = 0; |
b8aa1682 JD |
2794 | void *status; |
2795 | ||
b8aa1682 JD |
2796 | /* Parse arguments */ |
2797 | progname = argv[0]; | |
178a0557 MD |
2798 | if (set_options(argc, argv)) { |
2799 | retval = -1; | |
2800 | goto exit_options; | |
b8aa1682 JD |
2801 | } |
2802 | ||
178a0557 MD |
2803 | if (set_signal_handler()) { |
2804 | retval = -1; | |
2805 | goto exit_options; | |
b8aa1682 JD |
2806 | } |
2807 | ||
f5a36bab JR |
2808 | if (!opt_allow_clear) { |
2809 | DBG("Clear command disallowed."); | |
2810 | } | |
2811 | ||
4d513a50 DG |
2812 | /* Try to create directory if -o, --output is specified. */ |
2813 | if (opt_output_path) { | |
994fa64f DG |
2814 | if (*opt_output_path != '/') { |
2815 | ERR("Please specify an absolute path for -o, --output PATH"); | |
178a0557 MD |
2816 | retval = -1; |
2817 | goto exit_options; | |
994fa64f DG |
2818 | } |
2819 | ||
d77dded2 JG |
2820 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG, |
2821 | -1, -1); | |
4d513a50 DG |
2822 | if (ret < 0) { |
2823 | ERR("Unable to create %s", opt_output_path); | |
178a0557 MD |
2824 | retval = -1; |
2825 | goto exit_options; | |
4d513a50 DG |
2826 | } |
2827 | } | |
2828 | ||
b8aa1682 | 2829 | /* Daemonize */ |
b5218ffb | 2830 | if (opt_daemon || opt_background) { |
3fd27398 MD |
2831 | int i; |
2832 | ||
2833 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, | |
2834 | !opt_background); | |
b8aa1682 | 2835 | if (ret < 0) { |
178a0557 MD |
2836 | retval = -1; |
2837 | goto exit_options; | |
b8aa1682 | 2838 | } |
3fd27398 MD |
2839 | |
2840 | /* | |
2841 | * We are in the child. Make sure all other file | |
2842 | * descriptors are closed, in case we are called with | |
2843 | * more opened file descriptors than the standard ones. | |
2844 | */ | |
2845 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
2846 | (void) close(i); | |
2847 | } | |
2848 | } | |
2849 | ||
178a0557 MD |
2850 | /* Initialize thread health monitoring */ |
2851 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
2852 | if (!health_relayd) { | |
2853 | PERROR("health_app_create error"); | |
2854 | retval = -1; | |
2855 | goto exit_health_app_create; | |
2856 | } | |
2857 | ||
3fd27398 | 2858 | /* Create thread quit pipe */ |
178a0557 MD |
2859 | if (init_thread_quit_pipe()) { |
2860 | retval = -1; | |
2861 | goto exit_init_data; | |
b8aa1682 JD |
2862 | } |
2863 | ||
b8aa1682 | 2864 | /* Setup the thread apps communication pipe. */ |
178a0557 MD |
2865 | if (create_relay_conn_pipe()) { |
2866 | retval = -1; | |
2867 | goto exit_init_data; | |
b8aa1682 JD |
2868 | } |
2869 | ||
2870 | /* Init relay command queue. */ | |
8bdee6e2 | 2871 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 | 2872 | |
554831e7 MD |
2873 | /* Initialize communication library */ |
2874 | lttcomm_init(); | |
87e45c13 | 2875 | lttcomm_inet_init(); |
554831e7 | 2876 | |
d3e2ba59 | 2877 | /* tables of sessions indexed by session ID */ |
7591bab1 MD |
2878 | sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2879 | if (!sessions_ht) { | |
178a0557 MD |
2880 | retval = -1; |
2881 | goto exit_init_data; | |
d3e2ba59 JD |
2882 | } |
2883 | ||
2884 | /* tables of streams indexed by stream ID */ | |
2a174661 | 2885 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 | 2886 | if (!relay_streams_ht) { |
178a0557 MD |
2887 | retval = -1; |
2888 | goto exit_init_data; | |
d3e2ba59 JD |
2889 | } |
2890 | ||
2891 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
2892 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2893 | if (!viewer_streams_ht) { | |
178a0557 MD |
2894 | retval = -1; |
2895 | goto exit_init_data; | |
55706a7d MD |
2896 | } |
2897 | ||
65931c8b | 2898 | ret = utils_create_pipe(health_quit_pipe); |
178a0557 MD |
2899 | if (ret) { |
2900 | retval = -1; | |
2901 | goto exit_health_quit_pipe; | |
65931c8b MD |
2902 | } |
2903 | ||
2904 | /* Create thread to manage the client socket */ | |
1a1a34b4 | 2905 | ret = pthread_create(&health_thread, default_pthread_attr(), |
65931c8b | 2906 | thread_manage_health, (void *) NULL); |
178a0557 MD |
2907 | if (ret) { |
2908 | errno = ret; | |
65931c8b | 2909 | PERROR("pthread_create health"); |
178a0557 MD |
2910 | retval = -1; |
2911 | goto exit_health_thread; | |
65931c8b MD |
2912 | } |
2913 | ||
b8aa1682 | 2914 | /* Setup the dispatcher thread */ |
1a1a34b4 | 2915 | ret = pthread_create(&dispatcher_thread, default_pthread_attr(), |
b8aa1682 | 2916 | relay_thread_dispatcher, (void *) NULL); |
178a0557 MD |
2917 | if (ret) { |
2918 | errno = ret; | |
b8aa1682 | 2919 | PERROR("pthread_create dispatcher"); |
178a0557 MD |
2920 | retval = -1; |
2921 | goto exit_dispatcher_thread; | |
b8aa1682 JD |
2922 | } |
2923 | ||
2924 | /* Setup the worker thread */ | |
1a1a34b4 | 2925 | ret = pthread_create(&worker_thread, default_pthread_attr(), |
7591bab1 | 2926 | relay_thread_worker, NULL); |
178a0557 MD |
2927 | if (ret) { |
2928 | errno = ret; | |
b8aa1682 | 2929 | PERROR("pthread_create worker"); |
178a0557 MD |
2930 | retval = -1; |
2931 | goto exit_worker_thread; | |
b8aa1682 JD |
2932 | } |
2933 | ||
2934 | /* Setup the listener thread */ | |
1a1a34b4 | 2935 | ret = pthread_create(&listener_thread, default_pthread_attr(), |
b8aa1682 | 2936 | relay_thread_listener, (void *) NULL); |
178a0557 MD |
2937 | if (ret) { |
2938 | errno = ret; | |
b8aa1682 | 2939 | PERROR("pthread_create listener"); |
178a0557 MD |
2940 | retval = -1; |
2941 | goto exit_listener_thread; | |
b8aa1682 JD |
2942 | } |
2943 | ||
7591bab1 | 2944 | ret = relayd_live_create(live_uri); |
178a0557 | 2945 | if (ret) { |
d3e2ba59 | 2946 | ERR("Starting live viewer threads"); |
178a0557 | 2947 | retval = -1; |
50138f51 | 2948 | goto exit_live; |
d3e2ba59 JD |
2949 | } |
2950 | ||
178a0557 MD |
2951 | /* |
2952 | * This is where we start awaiting program completion (e.g. through | |
2953 | * signal that asks threads to teardown). | |
2954 | */ | |
2955 | ||
2956 | ret = relayd_live_join(); | |
2957 | if (ret) { | |
2958 | retval = -1; | |
2959 | } | |
50138f51 | 2960 | exit_live: |
178a0557 | 2961 | |
b8aa1682 | 2962 | ret = pthread_join(listener_thread, &status); |
178a0557 MD |
2963 | if (ret) { |
2964 | errno = ret; | |
2965 | PERROR("pthread_join listener_thread"); | |
2966 | retval = -1; | |
b8aa1682 JD |
2967 | } |
2968 | ||
178a0557 | 2969 | exit_listener_thread: |
b8aa1682 | 2970 | ret = pthread_join(worker_thread, &status); |
178a0557 MD |
2971 | if (ret) { |
2972 | errno = ret; | |
2973 | PERROR("pthread_join worker_thread"); | |
2974 | retval = -1; | |
b8aa1682 JD |
2975 | } |
2976 | ||
178a0557 | 2977 | exit_worker_thread: |
b8aa1682 | 2978 | ret = pthread_join(dispatcher_thread, &status); |
178a0557 MD |
2979 | if (ret) { |
2980 | errno = ret; | |
2981 | PERROR("pthread_join dispatcher_thread"); | |
2982 | retval = -1; | |
b8aa1682 | 2983 | } |
178a0557 | 2984 | exit_dispatcher_thread: |
42415026 | 2985 | |
65931c8b | 2986 | ret = pthread_join(health_thread, &status); |
178a0557 MD |
2987 | if (ret) { |
2988 | errno = ret; | |
2989 | PERROR("pthread_join health_thread"); | |
2990 | retval = -1; | |
65931c8b | 2991 | } |
178a0557 | 2992 | exit_health_thread: |
65931c8b | 2993 | |
65931c8b | 2994 | utils_close_pipe(health_quit_pipe); |
178a0557 | 2995 | exit_health_quit_pipe: |
65931c8b | 2996 | |
178a0557 | 2997 | exit_init_data: |
55706a7d | 2998 | health_app_destroy(health_relayd); |
55706a7d | 2999 | exit_health_app_create: |
178a0557 | 3000 | exit_options: |
4d62fbf8 MD |
3001 | /* |
3002 | * Wait for all pending call_rcu work to complete before tearing | |
3003 | * down data structures. call_rcu worker may be trying to | |
3004 | * perform lookups in those structures. | |
3005 | */ | |
3006 | rcu_barrier(); | |
7591bab1 MD |
3007 | relayd_cleanup(); |
3008 | ||
3009 | /* Ensure all prior call_rcu are done. */ | |
3010 | rcu_barrier(); | |
d3e2ba59 | 3011 | |
178a0557 | 3012 | if (!retval) { |
b8aa1682 | 3013 | exit(EXIT_SUCCESS); |
178a0557 MD |
3014 | } else { |
3015 | exit(EXIT_FAILURE); | |
b8aa1682 | 3016 | } |
b8aa1682 | 3017 | } |