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" |
b8aa1682 JD |
73 | |
74 | /* command line options */ | |
0f907de1 | 75 | char *opt_output_path; |
b5218ffb | 76 | static int opt_daemon, opt_background; |
3fd27398 MD |
77 | |
78 | /* | |
79 | * We need to wait for listener and live listener threads, as well as | |
80 | * health check thread, before being ready to signal readiness. | |
81 | */ | |
82 | #define NR_LTTNG_RELAY_READY 3 | |
83 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
84 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ | |
85 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
86 | ||
095a4ae5 MD |
87 | static struct lttng_uri *control_uri; |
88 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 89 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
90 | |
91 | const char *progname; | |
b8aa1682 | 92 | |
65931c8b | 93 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
94 | static int tracing_group_name_override; |
95 | ||
96 | const char * const config_section_name = "relayd"; | |
65931c8b | 97 | |
b8aa1682 JD |
98 | /* |
99 | * Quit pipe for all threads. This permits a single cancellation point | |
100 | * for all threads when receiving an event on the pipe. | |
101 | */ | |
0b242f62 | 102 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
103 | |
104 | /* | |
105 | * This pipe is used to inform the worker thread that a command is queued and | |
106 | * ready to be processed. | |
107 | */ | |
58eb9381 | 108 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 109 | |
26c9d55e | 110 | /* Shared between threads */ |
b8aa1682 JD |
111 | static int dispatch_thread_exit; |
112 | ||
113 | static pthread_t listener_thread; | |
114 | static pthread_t dispatcher_thread; | |
115 | static pthread_t worker_thread; | |
65931c8b | 116 | static pthread_t health_thread; |
b8aa1682 | 117 | |
7591bab1 MD |
118 | /* |
119 | * last_relay_stream_id_lock protects last_relay_stream_id increment | |
120 | * atomicity on 32-bit architectures. | |
121 | */ | |
122 | static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER; | |
095a4ae5 | 123 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
124 | |
125 | /* | |
126 | * Relay command queue. | |
127 | * | |
128 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
129 | * queue. | |
130 | */ | |
58eb9381 | 131 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 JD |
132 | |
133 | /* buffer allocated at startup, used to store the trace data */ | |
095a4ae5 MD |
134 | static char *data_buffer; |
135 | static unsigned int data_buffer_size; | |
b8aa1682 | 136 | |
d3e2ba59 JD |
137 | /* Global relay stream hash table. */ |
138 | struct lttng_ht *relay_streams_ht; | |
139 | ||
92c6ca54 DG |
140 | /* Global relay viewer stream hash table. */ |
141 | struct lttng_ht *viewer_streams_ht; | |
142 | ||
7591bab1 MD |
143 | /* Global relay sessions hash table. */ |
144 | struct lttng_ht *sessions_ht; | |
0a6518b0 | 145 | |
55706a7d | 146 | /* Relayd health monitoring */ |
eea7556c | 147 | struct health_app *health_relayd; |
55706a7d | 148 | |
cd60b05a JG |
149 | static struct option long_options[] = { |
150 | { "control-port", 1, 0, 'C', }, | |
151 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 152 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 153 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 154 | { "background", 0, 0, 'b', }, |
cd60b05a JG |
155 | { "group", 1, 0, 'g', }, |
156 | { "help", 0, 0, 'h', }, | |
157 | { "output", 1, 0, 'o', }, | |
158 | { "verbose", 0, 0, 'v', }, | |
159 | { "config", 1, 0, 'f' }, | |
160 | { NULL, 0, 0, 0, }, | |
161 | }; | |
162 | ||
163 | static const char *config_ignore_options[] = { "help", "config" }; | |
164 | ||
b8aa1682 JD |
165 | /* |
166 | * usage function on stderr | |
167 | */ | |
7591bab1 | 168 | static void usage(void) |
b8aa1682 JD |
169 | { |
170 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); | |
994fa64f DG |
171 | fprintf(stderr, " -h, --help Display this usage.\n"); |
172 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
b5218ffb | 173 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
994fa64f DG |
174 | fprintf(stderr, " -C, --control-port URL Control port listening.\n"); |
175 | fprintf(stderr, " -D, --data-port URL Data port listening.\n"); | |
8d5c808e | 176 | fprintf(stderr, " -L, --live-port URL Live view port listening.\n"); |
994fa64f DG |
177 | fprintf(stderr, " -o, --output PATH Output path for traces. Must use an absolute path.\n"); |
178 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
65931c8b | 179 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
cd60b05a | 180 | fprintf(stderr, " -f --config Load daemon configuration file\n"); |
b8aa1682 JD |
181 | } |
182 | ||
cd60b05a JG |
183 | /* |
184 | * Take an option from the getopt output and set it in the right variable to be | |
185 | * used later. | |
186 | * | |
187 | * Return 0 on success else a negative value. | |
188 | */ | |
7591bab1 | 189 | static int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 190 | { |
cd60b05a JG |
191 | int ret; |
192 | ||
193 | switch (opt) { | |
194 | case 0: | |
195 | fprintf(stderr, "option %s", optname); | |
196 | if (arg) { | |
197 | fprintf(stderr, " with arg %s\n", arg); | |
198 | } | |
199 | break; | |
200 | case 'C': | |
e8fa9fb0 MD |
201 | if (lttng_is_setuid_setgid()) { |
202 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
203 | "-C, --control-port"); | |
204 | } else { | |
205 | ret = uri_parse(arg, &control_uri); | |
206 | if (ret < 0) { | |
207 | ERR("Invalid control URI specified"); | |
208 | goto end; | |
209 | } | |
210 | if (control_uri->port == 0) { | |
211 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
212 | } | |
cd60b05a JG |
213 | } |
214 | break; | |
215 | case 'D': | |
e8fa9fb0 MD |
216 | if (lttng_is_setuid_setgid()) { |
217 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
218 | "-D, -data-port"); | |
219 | } else { | |
220 | ret = uri_parse(arg, &data_uri); | |
221 | if (ret < 0) { | |
222 | ERR("Invalid data URI specified"); | |
223 | goto end; | |
224 | } | |
225 | if (data_uri->port == 0) { | |
226 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
227 | } | |
cd60b05a JG |
228 | } |
229 | break; | |
8d5c808e | 230 | case 'L': |
e8fa9fb0 MD |
231 | if (lttng_is_setuid_setgid()) { |
232 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
233 | "-L, -live-port"); | |
234 | } else { | |
235 | ret = uri_parse(arg, &live_uri); | |
236 | if (ret < 0) { | |
237 | ERR("Invalid live URI specified"); | |
238 | goto end; | |
239 | } | |
240 | if (live_uri->port == 0) { | |
241 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
242 | } | |
8d5c808e AM |
243 | } |
244 | break; | |
cd60b05a JG |
245 | case 'd': |
246 | opt_daemon = 1; | |
247 | break; | |
b5218ffb MD |
248 | case 'b': |
249 | opt_background = 1; | |
250 | break; | |
cd60b05a | 251 | case 'g': |
e8fa9fb0 MD |
252 | if (lttng_is_setuid_setgid()) { |
253 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
254 | "-g, --group"); | |
255 | } else { | |
256 | tracing_group_name = strdup(arg); | |
257 | if (tracing_group_name == NULL) { | |
258 | ret = -errno; | |
259 | PERROR("strdup"); | |
260 | goto end; | |
261 | } | |
262 | tracing_group_name_override = 1; | |
330a40bb | 263 | } |
cd60b05a JG |
264 | break; |
265 | case 'h': | |
266 | usage(); | |
267 | exit(EXIT_FAILURE); | |
268 | case 'o': | |
e8fa9fb0 MD |
269 | if (lttng_is_setuid_setgid()) { |
270 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
271 | "-o, --output"); | |
272 | } else { | |
273 | ret = asprintf(&opt_output_path, "%s", arg); | |
274 | if (ret < 0) { | |
275 | ret = -errno; | |
276 | PERROR("asprintf opt_output_path"); | |
277 | goto end; | |
278 | } | |
cd60b05a JG |
279 | } |
280 | break; | |
281 | case 'v': | |
282 | /* Verbose level can increase using multiple -v */ | |
283 | if (arg) { | |
284 | lttng_opt_verbose = config_parse_value(arg); | |
285 | } else { | |
849e5b7b DG |
286 | /* Only 3 level of verbosity (-vvv). */ |
287 | if (lttng_opt_verbose < 3) { | |
288 | lttng_opt_verbose += 1; | |
289 | } | |
cd60b05a JG |
290 | } |
291 | break; | |
292 | default: | |
293 | /* Unknown option or other error. | |
294 | * Error is printed by getopt, just return */ | |
295 | ret = -1; | |
296 | goto end; | |
297 | } | |
298 | ||
299 | /* All good. */ | |
300 | ret = 0; | |
301 | ||
302 | end: | |
303 | return ret; | |
304 | } | |
305 | ||
306 | /* | |
307 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 308 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
cd60b05a JG |
309 | * return value conventions. |
310 | */ | |
7591bab1 | 311 | static int config_entry_handler(const struct config_entry *entry, void *unused) |
cd60b05a JG |
312 | { |
313 | int ret = 0, i; | |
314 | ||
315 | if (!entry || !entry->name || !entry->value) { | |
316 | ret = -EINVAL; | |
317 | goto end; | |
318 | } | |
319 | ||
320 | /* Check if the option is to be ignored */ | |
321 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
322 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
323 | goto end; | |
324 | } | |
325 | } | |
326 | ||
327 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
328 | /* Ignore if entry name is not fully matched. */ | |
329 | if (strcmp(entry->name, long_options[i].name)) { | |
330 | continue; | |
331 | } | |
332 | ||
333 | /* | |
7591bab1 MD |
334 | * If the option takes no argument on the command line, |
335 | * we have to check if the value is "true". We support | |
336 | * non-zero numeric values, true, on and yes. | |
cd60b05a JG |
337 | */ |
338 | if (!long_options[i].has_arg) { | |
339 | ret = config_parse_value(entry->value); | |
340 | if (ret <= 0) { | |
341 | if (ret) { | |
342 | WARN("Invalid configuration value \"%s\" for option %s", | |
343 | entry->value, entry->name); | |
344 | } | |
345 | /* False, skip boolean config option. */ | |
346 | goto end; | |
347 | } | |
348 | } | |
349 | ||
350 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
351 | goto end; | |
352 | } | |
353 | ||
354 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
355 | entry->name); | |
356 | ||
357 | end: | |
358 | return ret; | |
359 | } | |
360 | ||
7591bab1 | 361 | static int set_options(int argc, char **argv) |
cd60b05a | 362 | { |
178a0557 | 363 | int c, ret = 0, option_index = 0, retval = 0; |
cd60b05a JG |
364 | int orig_optopt = optopt, orig_optind = optind; |
365 | char *default_address, *optstring; | |
366 | const char *config_path = NULL; | |
367 | ||
368 | optstring = utils_generate_optstring(long_options, | |
369 | sizeof(long_options) / sizeof(struct option)); | |
370 | if (!optstring) { | |
178a0557 | 371 | retval = -ENOMEM; |
cd60b05a JG |
372 | goto exit; |
373 | } | |
374 | ||
375 | /* Check for the --config option */ | |
376 | ||
377 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
378 | &option_index)) != -1) { | |
379 | if (c == '?') { | |
178a0557 | 380 | retval = -EINVAL; |
cd60b05a JG |
381 | goto exit; |
382 | } else if (c != 'f') { | |
383 | continue; | |
384 | } | |
385 | ||
e8fa9fb0 MD |
386 | if (lttng_is_setuid_setgid()) { |
387 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
388 | "-f, --config"); | |
389 | } else { | |
390 | config_path = utils_expand_path(optarg); | |
391 | if (!config_path) { | |
392 | ERR("Failed to resolve path: %s", optarg); | |
393 | } | |
cd60b05a JG |
394 | } |
395 | } | |
396 | ||
397 | ret = config_get_section_entries(config_path, config_section_name, | |
398 | config_entry_handler, NULL); | |
399 | if (ret) { | |
400 | if (ret > 0) { | |
401 | ERR("Invalid configuration option at line %i", ret); | |
cd60b05a | 402 | } |
178a0557 | 403 | retval = -1; |
cd60b05a JG |
404 | goto exit; |
405 | } | |
b8aa1682 | 406 | |
cd60b05a JG |
407 | /* Reset getopt's global state */ |
408 | optopt = orig_optopt; | |
409 | optind = orig_optind; | |
b8aa1682 | 410 | while (1) { |
cd60b05a | 411 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
412 | if (c == -1) { |
413 | break; | |
414 | } | |
415 | ||
cd60b05a JG |
416 | ret = set_option(c, optarg, long_options[option_index].name); |
417 | if (ret < 0) { | |
178a0557 | 418 | retval = -1; |
b8aa1682 JD |
419 | goto exit; |
420 | } | |
421 | } | |
422 | ||
423 | /* assign default values */ | |
424 | if (control_uri == NULL) { | |
fa91dc52 MD |
425 | ret = asprintf(&default_address, |
426 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
427 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
428 | if (ret < 0) { |
429 | PERROR("asprintf default data address"); | |
178a0557 | 430 | retval = -1; |
b8aa1682 JD |
431 | goto exit; |
432 | } | |
433 | ||
434 | ret = uri_parse(default_address, &control_uri); | |
435 | free(default_address); | |
436 | if (ret < 0) { | |
437 | ERR("Invalid control URI specified"); | |
178a0557 | 438 | retval = -1; |
b8aa1682 JD |
439 | goto exit; |
440 | } | |
441 | } | |
442 | if (data_uri == NULL) { | |
fa91dc52 MD |
443 | ret = asprintf(&default_address, |
444 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
445 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
446 | if (ret < 0) { |
447 | PERROR("asprintf default data address"); | |
178a0557 | 448 | retval = -1; |
b8aa1682 JD |
449 | goto exit; |
450 | } | |
451 | ||
452 | ret = uri_parse(default_address, &data_uri); | |
453 | free(default_address); | |
454 | if (ret < 0) { | |
455 | ERR("Invalid data URI specified"); | |
178a0557 | 456 | retval = -1; |
b8aa1682 JD |
457 | goto exit; |
458 | } | |
459 | } | |
d3e2ba59 | 460 | if (live_uri == NULL) { |
fa91dc52 MD |
461 | ret = asprintf(&default_address, |
462 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
463 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
464 | if (ret < 0) { |
465 | PERROR("asprintf default viewer control address"); | |
178a0557 | 466 | retval = -1; |
d3e2ba59 JD |
467 | goto exit; |
468 | } | |
469 | ||
470 | ret = uri_parse(default_address, &live_uri); | |
471 | free(default_address); | |
472 | if (ret < 0) { | |
473 | ERR("Invalid viewer control URI specified"); | |
178a0557 | 474 | retval = -1; |
d3e2ba59 JD |
475 | goto exit; |
476 | } | |
477 | } | |
b8aa1682 JD |
478 | |
479 | exit: | |
cd60b05a | 480 | free(optstring); |
178a0557 | 481 | return retval; |
b8aa1682 JD |
482 | } |
483 | ||
7591bab1 MD |
484 | static void print_global_objects(void) |
485 | { | |
486 | rcu_register_thread(); | |
487 | ||
488 | print_viewer_streams(); | |
489 | print_relay_streams(); | |
490 | print_sessions(); | |
491 | ||
492 | rcu_unregister_thread(); | |
493 | } | |
494 | ||
b8aa1682 JD |
495 | /* |
496 | * Cleanup the daemon | |
497 | */ | |
7591bab1 | 498 | static void relayd_cleanup(void) |
b8aa1682 | 499 | { |
7591bab1 MD |
500 | print_global_objects(); |
501 | ||
b8aa1682 JD |
502 | DBG("Cleaning up"); |
503 | ||
178a0557 MD |
504 | if (viewer_streams_ht) |
505 | lttng_ht_destroy(viewer_streams_ht); | |
506 | if (relay_streams_ht) | |
507 | lttng_ht_destroy(relay_streams_ht); | |
7591bab1 MD |
508 | if (sessions_ht) |
509 | lttng_ht_destroy(sessions_ht); | |
178a0557 | 510 | |
095a4ae5 MD |
511 | /* free the dynamically allocated opt_output_path */ |
512 | free(opt_output_path); | |
513 | ||
a02de639 CB |
514 | /* Close thread quit pipes */ |
515 | utils_close_pipe(thread_quit_pipe); | |
516 | ||
710c1f73 DG |
517 | uri_free(control_uri); |
518 | uri_free(data_uri); | |
8d5c808e | 519 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
520 | |
521 | if (tracing_group_name_override) { | |
522 | free((void *) tracing_group_name); | |
523 | } | |
b8aa1682 JD |
524 | } |
525 | ||
526 | /* | |
527 | * Write to writable pipe used to notify a thread. | |
528 | */ | |
7591bab1 | 529 | static int notify_thread_pipe(int wpipe) |
b8aa1682 | 530 | { |
6cd525e8 | 531 | ssize_t ret; |
b8aa1682 | 532 | |
6cd525e8 MD |
533 | ret = lttng_write(wpipe, "!", 1); |
534 | if (ret < 1) { | |
b8aa1682 | 535 | PERROR("write poll pipe"); |
b4aacfdc | 536 | goto end; |
b8aa1682 | 537 | } |
b4aacfdc MD |
538 | ret = 0; |
539 | end: | |
b8aa1682 JD |
540 | return ret; |
541 | } | |
542 | ||
7591bab1 | 543 | static int notify_health_quit_pipe(int *pipe) |
65931c8b | 544 | { |
6cd525e8 | 545 | ssize_t ret; |
65931c8b | 546 | |
6cd525e8 MD |
547 | ret = lttng_write(pipe[1], "4", 1); |
548 | if (ret < 1) { | |
65931c8b | 549 | PERROR("write relay health quit"); |
b4aacfdc | 550 | goto end; |
65931c8b | 551 | } |
b4aacfdc MD |
552 | ret = 0; |
553 | end: | |
554 | return ret; | |
65931c8b MD |
555 | } |
556 | ||
b8aa1682 | 557 | /* |
b4aacfdc | 558 | * Stop all relayd and relayd-live threads. |
b8aa1682 | 559 | */ |
b4aacfdc | 560 | int lttng_relay_stop_threads(void) |
b8aa1682 | 561 | { |
b4aacfdc | 562 | int retval = 0; |
b8aa1682 JD |
563 | |
564 | /* Stopping all threads */ | |
565 | DBG("Terminating all threads"); | |
b4aacfdc | 566 | if (notify_thread_pipe(thread_quit_pipe[1])) { |
b8aa1682 | 567 | ERR("write error on thread quit pipe"); |
b4aacfdc | 568 | retval = -1; |
b8aa1682 JD |
569 | } |
570 | ||
b4aacfdc MD |
571 | if (notify_health_quit_pipe(health_quit_pipe)) { |
572 | ERR("write error on health quit pipe"); | |
573 | } | |
65931c8b | 574 | |
b8aa1682 | 575 | /* Dispatch thread */ |
26c9d55e | 576 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 577 | futex_nto1_wake(&relay_conn_queue.futex); |
178a0557 | 578 | |
b4aacfdc | 579 | if (relayd_live_stop()) { |
178a0557 | 580 | ERR("Error stopping live threads"); |
b4aacfdc | 581 | retval = -1; |
178a0557 | 582 | } |
b4aacfdc | 583 | return retval; |
b8aa1682 JD |
584 | } |
585 | ||
586 | /* | |
587 | * Signal handler for the daemon | |
588 | * | |
589 | * Simply stop all worker threads, leaving main() return gracefully after | |
590 | * joining all threads and calling cleanup(). | |
591 | */ | |
7591bab1 | 592 | static void sighandler(int sig) |
b8aa1682 JD |
593 | { |
594 | switch (sig) { | |
595 | case SIGPIPE: | |
596 | DBG("SIGPIPE caught"); | |
597 | return; | |
598 | case SIGINT: | |
599 | DBG("SIGINT caught"); | |
b4aacfdc MD |
600 | if (lttng_relay_stop_threads()) { |
601 | ERR("Error stopping threads"); | |
602 | } | |
b8aa1682 JD |
603 | break; |
604 | case SIGTERM: | |
605 | DBG("SIGTERM caught"); | |
b4aacfdc MD |
606 | if (lttng_relay_stop_threads()) { |
607 | ERR("Error stopping threads"); | |
608 | } | |
b8aa1682 | 609 | break; |
3fd27398 MD |
610 | case SIGUSR1: |
611 | CMM_STORE_SHARED(recv_child_signal, 1); | |
612 | break; | |
b8aa1682 JD |
613 | default: |
614 | break; | |
615 | } | |
616 | } | |
617 | ||
618 | /* | |
619 | * Setup signal handler for : | |
620 | * SIGINT, SIGTERM, SIGPIPE | |
621 | */ | |
7591bab1 | 622 | static int set_signal_handler(void) |
b8aa1682 JD |
623 | { |
624 | int ret = 0; | |
625 | struct sigaction sa; | |
626 | sigset_t sigset; | |
627 | ||
628 | if ((ret = sigemptyset(&sigset)) < 0) { | |
629 | PERROR("sigemptyset"); | |
630 | return ret; | |
631 | } | |
632 | ||
633 | sa.sa_handler = sighandler; | |
634 | sa.sa_mask = sigset; | |
635 | sa.sa_flags = 0; | |
636 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
637 | PERROR("sigaction"); | |
638 | return ret; | |
639 | } | |
640 | ||
641 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
642 | PERROR("sigaction"); | |
643 | return ret; | |
644 | } | |
645 | ||
646 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
647 | PERROR("sigaction"); | |
648 | return ret; | |
649 | } | |
650 | ||
3fd27398 MD |
651 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
652 | PERROR("sigaction"); | |
653 | return ret; | |
654 | } | |
655 | ||
656 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
657 | |
658 | return ret; | |
659 | } | |
660 | ||
3fd27398 MD |
661 | void lttng_relay_notify_ready(void) |
662 | { | |
663 | /* Notify the parent of the fork() process that we are ready. */ | |
664 | if (opt_daemon || opt_background) { | |
665 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
666 | kill(child_ppid, SIGUSR1); | |
667 | } | |
668 | } | |
669 | } | |
670 | ||
b8aa1682 JD |
671 | /* |
672 | * Init thread quit pipe. | |
673 | * | |
674 | * Return -1 on error or 0 if all pipes are created. | |
675 | */ | |
7591bab1 | 676 | static int init_thread_quit_pipe(void) |
b8aa1682 | 677 | { |
a02de639 | 678 | int ret; |
b8aa1682 | 679 | |
a02de639 | 680 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 681 | |
b8aa1682 JD |
682 | return ret; |
683 | } | |
684 | ||
685 | /* | |
686 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
687 | */ | |
7591bab1 | 688 | static int create_thread_poll_set(struct lttng_poll_event *events, int size) |
b8aa1682 JD |
689 | { |
690 | int ret; | |
691 | ||
692 | if (events == NULL || size == 0) { | |
693 | ret = -1; | |
694 | goto error; | |
695 | } | |
696 | ||
697 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
698 | if (ret < 0) { | |
699 | goto error; | |
700 | } | |
701 | ||
702 | /* Add quit pipe */ | |
c7759e6a | 703 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
704 | if (ret < 0) { |
705 | goto error; | |
706 | } | |
707 | ||
708 | return 0; | |
709 | ||
710 | error: | |
711 | return ret; | |
712 | } | |
713 | ||
714 | /* | |
715 | * Check if the thread quit pipe was triggered. | |
716 | * | |
717 | * Return 1 if it was triggered else 0; | |
718 | */ | |
7591bab1 | 719 | static int check_thread_quit_pipe(int fd, uint32_t events) |
b8aa1682 JD |
720 | { |
721 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
722 | return 1; | |
723 | } | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | /* | |
729 | * Create and init socket from uri. | |
730 | */ | |
7591bab1 | 731 | static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri) |
b8aa1682 JD |
732 | { |
733 | int ret; | |
734 | struct lttcomm_sock *sock = NULL; | |
735 | ||
736 | sock = lttcomm_alloc_sock_from_uri(uri); | |
737 | if (sock == NULL) { | |
738 | ERR("Allocating socket"); | |
739 | goto error; | |
740 | } | |
741 | ||
742 | ret = lttcomm_create_sock(sock); | |
743 | if (ret < 0) { | |
744 | goto error; | |
745 | } | |
746 | DBG("Listening on sock %d", sock->fd); | |
747 | ||
748 | ret = sock->ops->bind(sock); | |
749 | if (ret < 0) { | |
750 | goto error; | |
751 | } | |
752 | ||
753 | ret = sock->ops->listen(sock, -1); | |
754 | if (ret < 0) { | |
755 | goto error; | |
756 | ||
757 | } | |
758 | ||
759 | return sock; | |
760 | ||
761 | error: | |
762 | if (sock) { | |
763 | lttcomm_destroy_sock(sock); | |
764 | } | |
765 | return NULL; | |
766 | } | |
767 | ||
768 | /* | |
769 | * This thread manages the listening for new connections on the network | |
770 | */ | |
7591bab1 | 771 | static void *relay_thread_listener(void *data) |
b8aa1682 | 772 | { |
095a4ae5 | 773 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
774 | uint32_t revents, nb_fd; |
775 | struct lttng_poll_event events; | |
776 | struct lttcomm_sock *control_sock, *data_sock; | |
777 | ||
b8aa1682 JD |
778 | DBG("[thread] Relay listener started"); |
779 | ||
55706a7d MD |
780 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
781 | ||
f385ae0a MD |
782 | health_code_update(); |
783 | ||
7591bab1 | 784 | control_sock = relay_socket_create(control_uri); |
b8aa1682 | 785 | if (!control_sock) { |
095a4ae5 | 786 | goto error_sock_control; |
b8aa1682 JD |
787 | } |
788 | ||
7591bab1 | 789 | data_sock = relay_socket_create(data_uri); |
b8aa1682 | 790 | if (!data_sock) { |
095a4ae5 | 791 | goto error_sock_relay; |
b8aa1682 JD |
792 | } |
793 | ||
794 | /* | |
7591bab1 MD |
795 | * Pass 3 as size here for the thread quit pipe, control and |
796 | * data socket. | |
b8aa1682 JD |
797 | */ |
798 | ret = create_thread_poll_set(&events, 3); | |
799 | if (ret < 0) { | |
800 | goto error_create_poll; | |
801 | } | |
802 | ||
803 | /* Add the control socket */ | |
804 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
805 | if (ret < 0) { | |
806 | goto error_poll_add; | |
807 | } | |
808 | ||
809 | /* Add the data socket */ | |
810 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
811 | if (ret < 0) { | |
812 | goto error_poll_add; | |
813 | } | |
814 | ||
3fd27398 MD |
815 | lttng_relay_notify_ready(); |
816 | ||
9b5e0863 MD |
817 | if (testpoint(relayd_thread_listener)) { |
818 | goto error_testpoint; | |
819 | } | |
820 | ||
b8aa1682 | 821 | while (1) { |
f385ae0a MD |
822 | health_code_update(); |
823 | ||
b8aa1682 JD |
824 | DBG("Listener accepting connections"); |
825 | ||
b8aa1682 | 826 | restart: |
f385ae0a | 827 | health_poll_entry(); |
b8aa1682 | 828 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 829 | health_poll_exit(); |
b8aa1682 JD |
830 | if (ret < 0) { |
831 | /* | |
832 | * Restart interrupted system call. | |
833 | */ | |
834 | if (errno == EINTR) { | |
835 | goto restart; | |
836 | } | |
837 | goto error; | |
838 | } | |
839 | ||
0d9c5d77 DG |
840 | nb_fd = ret; |
841 | ||
b8aa1682 JD |
842 | DBG("Relay new connection received"); |
843 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
844 | health_code_update(); |
845 | ||
b8aa1682 JD |
846 | /* Fetch once the poll data */ |
847 | revents = LTTNG_POLL_GETEV(&events, i); | |
848 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
849 | ||
fd20dac9 | 850 | if (!revents) { |
7591bab1 MD |
851 | /* |
852 | * No activity for this FD (poll | |
853 | * implementation). | |
854 | */ | |
fd20dac9 MD |
855 | continue; |
856 | } | |
857 | ||
b8aa1682 JD |
858 | /* Thread quit pipe has been closed. Killing thread. */ |
859 | ret = check_thread_quit_pipe(pollfd, revents); | |
860 | if (ret) { | |
095a4ae5 MD |
861 | err = 0; |
862 | goto exit; | |
b8aa1682 JD |
863 | } |
864 | ||
03e43155 | 865 | if (revents & LPOLLIN) { |
4b7f17b2 | 866 | /* |
7591bab1 MD |
867 | * A new connection is requested, therefore a |
868 | * sessiond/consumerd connection is allocated in | |
869 | * this thread, enqueued to a global queue and | |
870 | * dequeued (and freed) in the worker thread. | |
4b7f17b2 | 871 | */ |
58eb9381 DG |
872 | int val = 1; |
873 | struct relay_connection *new_conn; | |
4b7f17b2 | 874 | struct lttcomm_sock *newsock; |
7591bab1 | 875 | enum connection_type type; |
b8aa1682 JD |
876 | |
877 | if (pollfd == data_sock->fd) { | |
7591bab1 | 878 | type = RELAY_DATA; |
b8aa1682 | 879 | newsock = data_sock->ops->accept(data_sock); |
58eb9381 DG |
880 | DBG("Relay data connection accepted, socket %d", |
881 | newsock->fd); | |
4b7f17b2 MD |
882 | } else { |
883 | assert(pollfd == control_sock->fd); | |
7591bab1 | 884 | type = RELAY_CONTROL; |
b8aa1682 | 885 | newsock = control_sock->ops->accept(control_sock); |
58eb9381 DG |
886 | DBG("Relay control connection accepted, socket %d", |
887 | newsock->fd); | |
b8aa1682 | 888 | } |
58eb9381 DG |
889 | if (!newsock) { |
890 | PERROR("accepting sock"); | |
58eb9381 DG |
891 | goto error; |
892 | } | |
893 | ||
894 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
895 | sizeof(val)); | |
b8aa1682 JD |
896 | if (ret < 0) { |
897 | PERROR("setsockopt inet"); | |
4b7f17b2 | 898 | lttcomm_destroy_sock(newsock); |
b8aa1682 JD |
899 | goto error; |
900 | } | |
7591bab1 MD |
901 | new_conn = connection_create(newsock, type); |
902 | if (!new_conn) { | |
903 | lttcomm_destroy_sock(newsock); | |
904 | goto error; | |
905 | } | |
58eb9381 DG |
906 | |
907 | /* Enqueue request for the dispatcher thread. */ | |
8bdee6e2 SM |
908 | cds_wfcq_enqueue(&relay_conn_queue.head, &relay_conn_queue.tail, |
909 | &new_conn->qnode); | |
b8aa1682 JD |
910 | |
911 | /* | |
7591bab1 MD |
912 | * Wake the dispatch queue futex. |
913 | * Implicit memory barrier with the | |
914 | * exchange in cds_wfcq_enqueue. | |
b8aa1682 | 915 | */ |
58eb9381 | 916 | futex_nto1_wake(&relay_conn_queue.futex); |
03e43155 MD |
917 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
918 | ERR("socket poll error"); | |
919 | goto error; | |
920 | } else { | |
921 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
922 | goto error; | |
b8aa1682 JD |
923 | } |
924 | } | |
925 | } | |
926 | ||
095a4ae5 | 927 | exit: |
b8aa1682 JD |
928 | error: |
929 | error_poll_add: | |
9b5e0863 | 930 | error_testpoint: |
b8aa1682 JD |
931 | lttng_poll_clean(&events); |
932 | error_create_poll: | |
095a4ae5 MD |
933 | if (data_sock->fd >= 0) { |
934 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
935 | if (ret) { |
936 | PERROR("close"); | |
937 | } | |
b8aa1682 | 938 | } |
095a4ae5 MD |
939 | lttcomm_destroy_sock(data_sock); |
940 | error_sock_relay: | |
941 | if (control_sock->fd >= 0) { | |
942 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
943 | if (ret) { |
944 | PERROR("close"); | |
945 | } | |
b8aa1682 | 946 | } |
095a4ae5 MD |
947 | lttcomm_destroy_sock(control_sock); |
948 | error_sock_control: | |
949 | if (err) { | |
f385ae0a MD |
950 | health_error(); |
951 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 952 | } |
55706a7d | 953 | health_unregister(health_relayd); |
b8aa1682 | 954 | DBG("Relay listener thread cleanup complete"); |
b4aacfdc | 955 | lttng_relay_stop_threads(); |
b8aa1682 JD |
956 | return NULL; |
957 | } | |
958 | ||
959 | /* | |
960 | * This thread manages the dispatching of the requests to worker threads | |
961 | */ | |
7591bab1 | 962 | static void *relay_thread_dispatcher(void *data) |
b8aa1682 | 963 | { |
6cd525e8 MD |
964 | int err = -1; |
965 | ssize_t ret; | |
8bdee6e2 | 966 | struct cds_wfcq_node *node; |
58eb9381 | 967 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
968 | |
969 | DBG("[thread] Relay dispatcher started"); | |
970 | ||
55706a7d MD |
971 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
972 | ||
9b5e0863 MD |
973 | if (testpoint(relayd_thread_dispatcher)) { |
974 | goto error_testpoint; | |
975 | } | |
976 | ||
f385ae0a MD |
977 | health_code_update(); |
978 | ||
26c9d55e | 979 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
f385ae0a MD |
980 | health_code_update(); |
981 | ||
b8aa1682 | 982 | /* Atomically prepare the queue futex */ |
58eb9381 | 983 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 JD |
984 | |
985 | do { | |
f385ae0a MD |
986 | health_code_update(); |
987 | ||
b8aa1682 | 988 | /* Dequeue commands */ |
8bdee6e2 SM |
989 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
990 | &relay_conn_queue.tail); | |
b8aa1682 JD |
991 | if (node == NULL) { |
992 | DBG("Woken up but nothing in the relay command queue"); | |
993 | /* Continue thread execution */ | |
994 | break; | |
995 | } | |
58eb9381 | 996 | new_conn = caa_container_of(node, struct relay_connection, qnode); |
b8aa1682 | 997 | |
58eb9381 | 998 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
999 | |
1000 | /* | |
7591bab1 MD |
1001 | * Inform worker thread of the new request. This |
1002 | * call is blocking so we can be assured that | |
1003 | * the data will be read at some point in time | |
1004 | * or wait to the end of the world :) | |
b8aa1682 | 1005 | */ |
58eb9381 DG |
1006 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
1007 | if (ret < 0) { | |
1008 | PERROR("write connection pipe"); | |
7591bab1 | 1009 | connection_put(new_conn); |
b8aa1682 JD |
1010 | goto error; |
1011 | } | |
1012 | } while (node != NULL); | |
1013 | ||
1014 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 1015 | health_poll_entry(); |
58eb9381 | 1016 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 1017 | health_poll_exit(); |
b8aa1682 JD |
1018 | } |
1019 | ||
f385ae0a MD |
1020 | /* Normal exit, no error */ |
1021 | err = 0; | |
1022 | ||
b8aa1682 | 1023 | error: |
9b5e0863 | 1024 | error_testpoint: |
f385ae0a MD |
1025 | if (err) { |
1026 | health_error(); | |
1027 | ERR("Health error occurred in %s", __func__); | |
1028 | } | |
55706a7d | 1029 | health_unregister(health_relayd); |
b8aa1682 | 1030 | DBG("Dispatch thread dying"); |
b4aacfdc | 1031 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1032 | return NULL; |
1033 | } | |
1034 | ||
b8aa1682 | 1035 | /* |
7591bab1 | 1036 | * Set index data from the control port to a given index object. |
b8aa1682 | 1037 | */ |
7591bab1 | 1038 | static int set_index_control_data(struct relay_index *index, |
1c20f0e2 JD |
1039 | struct lttcomm_relayd_index *data) |
1040 | { | |
7591bab1 | 1041 | struct ctf_packet_index index_data; |
1c20f0e2 JD |
1042 | |
1043 | /* | |
7591bab1 MD |
1044 | * The index on disk is encoded in big endian, so we don't need |
1045 | * to convert the data received on the network. The data_offset | |
1046 | * value is NEVER modified here and is updated by the data | |
1047 | * thread. | |
1c20f0e2 | 1048 | */ |
7591bab1 MD |
1049 | index_data.packet_size = data->packet_size; |
1050 | index_data.content_size = data->content_size; | |
1051 | index_data.timestamp_begin = data->timestamp_begin; | |
1052 | index_data.timestamp_end = data->timestamp_end; | |
1053 | index_data.events_discarded = data->events_discarded; | |
1054 | index_data.stream_id = data->stream_id; | |
1055 | return relay_index_set_data(index, &index_data); | |
1c20f0e2 JD |
1056 | } |
1057 | ||
c5b6f4f0 DG |
1058 | /* |
1059 | * Handle the RELAYD_CREATE_SESSION command. | |
1060 | * | |
1061 | * On success, send back the session id or else return a negative value. | |
1062 | */ | |
7591bab1 | 1063 | static int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1064 | struct relay_connection *conn) |
c5b6f4f0 DG |
1065 | { |
1066 | int ret = 0, send_ret; | |
1067 | struct relay_session *session; | |
1068 | struct lttcomm_relayd_status_session reply; | |
36d2e35d | 1069 | char session_name[LTTNG_NAME_MAX]; |
9cf3eb20 | 1070 | char hostname[LTTNG_HOST_NAME_MAX]; |
7591bab1 MD |
1071 | uint32_t live_timer = 0; |
1072 | bool snapshot = false; | |
c5b6f4f0 | 1073 | |
36d2e35d | 1074 | memset(session_name, 0, LTTNG_NAME_MAX); |
9cf3eb20 | 1075 | memset(hostname, 0, LTTNG_HOST_NAME_MAX); |
c5b6f4f0 DG |
1076 | |
1077 | memset(&reply, 0, sizeof(reply)); | |
1078 | ||
58eb9381 | 1079 | switch (conn->minor) { |
2a174661 DG |
1080 | case 1: |
1081 | case 2: | |
1082 | case 3: | |
1083 | break; | |
1084 | case 4: /* LTTng sessiond 2.4 */ | |
1085 | default: | |
7591bab1 MD |
1086 | ret = cmd_create_session_2_4(conn, session_name, |
1087 | hostname, &live_timer, &snapshot); | |
1088 | } | |
1089 | if (ret < 0) { | |
1090 | goto send_reply; | |
d3e2ba59 JD |
1091 | } |
1092 | ||
7591bab1 MD |
1093 | session = session_create(session_name, hostname, live_timer, |
1094 | snapshot, conn->major, conn->minor); | |
1095 | if (!session) { | |
1096 | ret = -1; | |
1097 | goto send_reply; | |
1098 | } | |
1099 | assert(!conn->session); | |
1100 | conn->session = session; | |
c5b6f4f0 DG |
1101 | DBG("Created session %" PRIu64, session->id); |
1102 | ||
7591bab1 MD |
1103 | reply.session_id = htobe64(session->id); |
1104 | ||
1105 | send_reply: | |
c5b6f4f0 DG |
1106 | if (ret < 0) { |
1107 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
1108 | } else { | |
1109 | reply.ret_code = htobe32(LTTNG_OK); | |
1110 | } | |
1111 | ||
58eb9381 | 1112 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c5b6f4f0 DG |
1113 | if (send_ret < 0) { |
1114 | ERR("Relayd sending session id"); | |
4169f5ad | 1115 | ret = send_ret; |
c5b6f4f0 DG |
1116 | } |
1117 | ||
1118 | return ret; | |
1119 | } | |
1120 | ||
a4baae1b JD |
1121 | /* |
1122 | * When we have received all the streams and the metadata for a channel, | |
1123 | * we make them visible to the viewer threads. | |
1124 | */ | |
7591bab1 | 1125 | static void publish_connection_local_streams(struct relay_connection *conn) |
a4baae1b | 1126 | { |
7591bab1 MD |
1127 | struct relay_stream *stream; |
1128 | struct relay_session *session = conn->session; | |
a4baae1b | 1129 | |
7591bab1 MD |
1130 | /* |
1131 | * We publish all streams belonging to a session atomically wrt | |
1132 | * session lock. | |
1133 | */ | |
1134 | pthread_mutex_lock(&session->lock); | |
1135 | rcu_read_lock(); | |
1136 | cds_list_for_each_entry_rcu(stream, &session->recv_list, | |
1137 | recv_node) { | |
1138 | stream_publish(stream); | |
a4baae1b | 1139 | } |
7591bab1 | 1140 | rcu_read_unlock(); |
a4baae1b | 1141 | |
7591bab1 MD |
1142 | /* |
1143 | * Inform the viewer that there are new streams in the session. | |
1144 | */ | |
1145 | if (session->viewer_attached) { | |
1146 | uatomic_set(&session->new_streams, 1); | |
1147 | } | |
1148 | pthread_mutex_unlock(&session->lock); | |
a4baae1b JD |
1149 | } |
1150 | ||
b8aa1682 JD |
1151 | /* |
1152 | * relay_add_stream: allocate a new stream for a session | |
1153 | */ | |
7591bab1 | 1154 | static int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1155 | struct relay_connection *conn) |
b8aa1682 | 1156 | { |
7591bab1 MD |
1157 | int ret; |
1158 | ssize_t send_ret; | |
58eb9381 | 1159 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1160 | struct relay_stream *stream = NULL; |
1161 | struct lttcomm_relayd_status_stream reply; | |
4030a636 | 1162 | struct ctf_trace *trace = NULL; |
7591bab1 MD |
1163 | uint64_t stream_handle = -1ULL; |
1164 | char *path_name = NULL, *channel_name = NULL; | |
1165 | uint64_t tracefile_size = 0, tracefile_count = 0; | |
b8aa1682 | 1166 | |
58eb9381 | 1167 | if (!session || conn->version_check_done == 0) { |
b8aa1682 JD |
1168 | ERR("Trying to add a stream before version check"); |
1169 | ret = -1; | |
1170 | goto end_no_session; | |
1171 | } | |
1172 | ||
7591bab1 MD |
1173 | switch (session->minor) { |
1174 | case 1: /* LTTng sessiond 2.1. Allocates path_name and channel_name. */ | |
1175 | ret = cmd_recv_stream_2_1(conn, &path_name, | |
1176 | &channel_name); | |
0f907de1 | 1177 | break; |
7591bab1 | 1178 | case 2: /* LTTng sessiond 2.2. Allocates path_name and channel_name. */ |
0f907de1 | 1179 | default: |
7591bab1 MD |
1180 | ret = cmd_recv_stream_2_2(conn, &path_name, |
1181 | &channel_name, &tracefile_size, &tracefile_count); | |
0f907de1 JD |
1182 | break; |
1183 | } | |
1184 | if (ret < 0) { | |
7591bab1 | 1185 | goto send_reply; |
b8aa1682 JD |
1186 | } |
1187 | ||
7591bab1 | 1188 | trace = ctf_trace_get_by_path_or_create(session, path_name); |
2a174661 | 1189 | if (!trace) { |
7591bab1 | 1190 | goto send_reply; |
2a174661 | 1191 | } |
7591bab1 | 1192 | /* This stream here has one reference on the trace. */ |
2a174661 | 1193 | |
7591bab1 MD |
1194 | pthread_mutex_lock(&last_relay_stream_id_lock); |
1195 | stream_handle = ++last_relay_stream_id; | |
1196 | pthread_mutex_unlock(&last_relay_stream_id_lock); | |
d3e2ba59 | 1197 | |
7591bab1 MD |
1198 | /* We pass ownership of path_name and channel_name. */ |
1199 | stream = stream_create(trace, stream_handle, path_name, | |
1200 | channel_name, tracefile_size, tracefile_count); | |
1201 | path_name = NULL; | |
1202 | channel_name = NULL; | |
a4baae1b | 1203 | |
2a174661 | 1204 | /* |
7591bab1 MD |
1205 | * Streams are the owners of their trace. Reference to trace is |
1206 | * kept within stream_create(). | |
2a174661 | 1207 | */ |
7591bab1 | 1208 | ctf_trace_put(trace); |
d3e2ba59 | 1209 | |
7591bab1 | 1210 | send_reply: |
53efb85a | 1211 | memset(&reply, 0, sizeof(reply)); |
7591bab1 MD |
1212 | reply.handle = htobe64(stream_handle); |
1213 | if (!stream) { | |
f73fabfd | 1214 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 1215 | } else { |
f73fabfd | 1216 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1217 | } |
5af40280 | 1218 | |
58eb9381 | 1219 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1220 | sizeof(struct lttcomm_relayd_status_stream), 0); |
1221 | if (send_ret < 0) { | |
1222 | ERR("Relay sending stream id"); | |
7591bab1 | 1223 | ret = (int) send_ret; |
b8aa1682 JD |
1224 | } |
1225 | ||
1226 | end_no_session: | |
7591bab1 MD |
1227 | free(path_name); |
1228 | free(channel_name); | |
0f907de1 | 1229 | return ret; |
b8aa1682 JD |
1230 | } |
1231 | ||
173af62f DG |
1232 | /* |
1233 | * relay_close_stream: close a specific stream | |
1234 | */ | |
7591bab1 | 1235 | static int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1236 | struct relay_connection *conn) |
173af62f | 1237 | { |
94d49140 | 1238 | int ret, send_ret; |
58eb9381 | 1239 | struct relay_session *session = conn->session; |
173af62f DG |
1240 | struct lttcomm_relayd_close_stream stream_info; |
1241 | struct lttcomm_relayd_generic_reply reply; | |
1242 | struct relay_stream *stream; | |
173af62f DG |
1243 | |
1244 | DBG("Close stream received"); | |
1245 | ||
58eb9381 | 1246 | if (!session || conn->version_check_done == 0) { |
173af62f DG |
1247 | ERR("Trying to close a stream before version check"); |
1248 | ret = -1; | |
1249 | goto end_no_session; | |
1250 | } | |
1251 | ||
58eb9381 | 1252 | ret = conn->sock->ops->recvmsg(conn->sock, &stream_info, |
7c5aef62 | 1253 | sizeof(struct lttcomm_relayd_close_stream), 0); |
173af62f | 1254 | if (ret < sizeof(struct lttcomm_relayd_close_stream)) { |
a6cd2b97 DG |
1255 | if (ret == 0) { |
1256 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1257 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1258 | } else { |
1259 | ERR("Relay didn't receive valid add_stream struct size : %d", ret); | |
1260 | } | |
173af62f DG |
1261 | ret = -1; |
1262 | goto end_no_session; | |
1263 | } | |
1264 | ||
7591bab1 | 1265 | stream = stream_get_by_id(be64toh(stream_info.stream_id)); |
173af62f DG |
1266 | if (!stream) { |
1267 | ret = -1; | |
7591bab1 | 1268 | goto end; |
173af62f | 1269 | } |
77f7bd85 MD |
1270 | |
1271 | /* | |
1272 | * Set last_net_seq_num before the close flag. Required by data | |
1273 | * pending check. | |
1274 | */ | |
7591bab1 | 1275 | pthread_mutex_lock(&stream->lock); |
8e2583a4 | 1276 | stream->last_net_seq_num = be64toh(stream_info.last_net_seq_num); |
77f7bd85 MD |
1277 | pthread_mutex_unlock(&stream->lock); |
1278 | ||
bda7c7b9 JG |
1279 | /* |
1280 | * This is one of the conditions which may trigger a stream close | |
1281 | * with the others being: | |
1282 | * 1) A close command is received for a stream | |
1283 | * 2) The control connection owning the stream is closed | |
1284 | * 3) We have received all of the stream's data _after_ a close | |
1285 | * request. | |
1286 | */ | |
1287 | try_stream_close(stream); | |
7591bab1 MD |
1288 | if (stream->is_metadata) { |
1289 | struct relay_viewer_stream *vstream; | |
173af62f | 1290 | |
7591bab1 MD |
1291 | vstream = viewer_stream_get_by_id(stream->stream_handle); |
1292 | if (vstream) { | |
1293 | if (vstream->metadata_sent == stream->metadata_received) { | |
1294 | /* | |
1295 | * Since all the metadata has been sent to the | |
1296 | * viewer and that we have a request to close | |
1297 | * its stream, we can safely teardown the | |
1298 | * corresponding metadata viewer stream. | |
1299 | */ | |
1300 | viewer_stream_put(vstream); | |
1301 | } | |
1302 | /* Put local reference. */ | |
1303 | viewer_stream_put(vstream); | |
1304 | } | |
1305 | } | |
7591bab1 | 1306 | stream_put(stream); |
173af62f | 1307 | |
7591bab1 | 1308 | end: |
53efb85a | 1309 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1310 | if (ret < 0) { |
f73fabfd | 1311 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1312 | } else { |
f73fabfd | 1313 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1314 | } |
58eb9381 | 1315 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f DG |
1316 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1317 | if (send_ret < 0) { | |
1318 | ERR("Relay sending stream id"); | |
4169f5ad | 1319 | ret = send_ret; |
173af62f DG |
1320 | } |
1321 | ||
1322 | end_no_session: | |
1323 | return ret; | |
1324 | } | |
1325 | ||
b8aa1682 JD |
1326 | /* |
1327 | * relay_unknown_command: send -1 if received unknown command | |
1328 | */ | |
7591bab1 | 1329 | static void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1330 | { |
1331 | struct lttcomm_relayd_generic_reply reply; | |
1332 | int ret; | |
1333 | ||
53efb85a | 1334 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1335 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 1336 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1337 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1338 | if (ret < 0) { | |
1339 | ERR("Relay sending unknown command"); | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * relay_start: send an acknowledgment to the client to tell if we are | |
1345 | * ready to receive data. We are ready if a session is established. | |
1346 | */ | |
7591bab1 | 1347 | static int relay_start(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1348 | struct relay_connection *conn) |
b8aa1682 | 1349 | { |
f73fabfd | 1350 | int ret = htobe32(LTTNG_OK); |
b8aa1682 | 1351 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1352 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1353 | |
1354 | if (!session) { | |
1355 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1356 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1357 | } |
1358 | ||
53efb85a | 1359 | memset(&reply, 0, sizeof(reply)); |
b8aa1682 | 1360 | reply.ret_code = ret; |
58eb9381 | 1361 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 JD |
1362 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
1363 | if (ret < 0) { | |
1364 | ERR("Relay sending start ack"); | |
1365 | } | |
1366 | ||
1367 | return ret; | |
1368 | } | |
1369 | ||
1d4dfdef DG |
1370 | /* |
1371 | * Append padding to the file pointed by the file descriptor fd. | |
1372 | */ | |
1373 | static int write_padding_to_file(int fd, uint32_t size) | |
1374 | { | |
6cd525e8 | 1375 | ssize_t ret = 0; |
1d4dfdef DG |
1376 | char *zeros; |
1377 | ||
1378 | if (size == 0) { | |
1379 | goto end; | |
1380 | } | |
1381 | ||
1382 | zeros = zmalloc(size); | |
1383 | if (zeros == NULL) { | |
1384 | PERROR("zmalloc zeros for padding"); | |
1385 | ret = -1; | |
1386 | goto end; | |
1387 | } | |
1388 | ||
6cd525e8 MD |
1389 | ret = lttng_write(fd, zeros, size); |
1390 | if (ret < size) { | |
1d4dfdef DG |
1391 | PERROR("write padding to file"); |
1392 | } | |
1393 | ||
e986c7a1 DG |
1394 | free(zeros); |
1395 | ||
1d4dfdef DG |
1396 | end: |
1397 | return ret; | |
1398 | } | |
1399 | ||
b8aa1682 | 1400 | /* |
7591bab1 | 1401 | * relay_recv_metadata: receive the metadata for the session. |
b8aa1682 | 1402 | */ |
7591bab1 | 1403 | static int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1404 | struct relay_connection *conn) |
b8aa1682 | 1405 | { |
32d1569c | 1406 | int ret = 0; |
6cd525e8 | 1407 | ssize_t size_ret; |
58eb9381 | 1408 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1409 | struct lttcomm_relayd_metadata_payload *metadata_struct; |
1410 | struct relay_stream *metadata_stream; | |
1411 | uint64_t data_size, payload_size; | |
1412 | ||
1413 | if (!session) { | |
1414 | ERR("Metadata sent before version check"); | |
1415 | ret = -1; | |
1416 | goto end; | |
1417 | } | |
1418 | ||
f6416125 MD |
1419 | data_size = payload_size = be64toh(recv_hdr->data_size); |
1420 | if (data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { | |
1421 | ERR("Incorrect data size"); | |
1422 | ret = -1; | |
1423 | goto end; | |
1424 | } | |
1425 | payload_size -= sizeof(struct lttcomm_relayd_metadata_payload); | |
1426 | ||
b8aa1682 | 1427 | if (data_buffer_size < data_size) { |
d7b3776f | 1428 | /* In case the realloc fails, we can free the memory */ |
c617c0c6 MD |
1429 | char *tmp_data_ptr; |
1430 | ||
1431 | tmp_data_ptr = realloc(data_buffer, data_size); | |
1432 | if (!tmp_data_ptr) { | |
b8aa1682 | 1433 | ERR("Allocating data buffer"); |
c617c0c6 | 1434 | free(data_buffer); |
b8aa1682 JD |
1435 | ret = -1; |
1436 | goto end; | |
1437 | } | |
c617c0c6 | 1438 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
1439 | data_buffer_size = data_size; |
1440 | } | |
1441 | memset(data_buffer, 0, data_size); | |
77c7c900 | 1442 | DBG2("Relay receiving metadata, waiting for %" PRIu64 " bytes", data_size); |
32d1569c JG |
1443 | size_ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0); |
1444 | if (size_ret < 0 || size_ret != data_size) { | |
1445 | if (size_ret == 0) { | |
a6cd2b97 | 1446 | /* Orderly shutdown. Not necessary to print an error. */ |
58eb9381 | 1447 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1448 | } else { |
1449 | ERR("Relay didn't receive the whole metadata"); | |
1450 | } | |
b8aa1682 | 1451 | ret = -1; |
b8aa1682 JD |
1452 | goto end; |
1453 | } | |
1454 | metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; | |
9d1bbf21 | 1455 | |
7591bab1 | 1456 | metadata_stream = stream_get_by_id(be64toh(metadata_struct->stream_id)); |
b8aa1682 JD |
1457 | if (!metadata_stream) { |
1458 | ret = -1; | |
7591bab1 | 1459 | goto end; |
b8aa1682 JD |
1460 | } |
1461 | ||
7591bab1 MD |
1462 | pthread_mutex_lock(&metadata_stream->lock); |
1463 | ||
1464 | size_ret = lttng_write(metadata_stream->stream_fd->fd, metadata_struct->payload, | |
6cd525e8 MD |
1465 | payload_size); |
1466 | if (size_ret < payload_size) { | |
b8aa1682 JD |
1467 | ERR("Relay error writing metadata on file"); |
1468 | ret = -1; | |
7591bab1 | 1469 | goto end_put; |
b8aa1682 | 1470 | } |
1d4dfdef | 1471 | |
32d1569c | 1472 | size_ret = write_padding_to_file(metadata_stream->stream_fd->fd, |
1d4dfdef | 1473 | be32toh(metadata_struct->padding_size)); |
32d1569c | 1474 | if (size_ret < 0) { |
7591bab1 | 1475 | goto end_put; |
1d4dfdef | 1476 | } |
2a174661 | 1477 | |
7591bab1 | 1478 | metadata_stream->metadata_received += |
d3e2ba59 | 1479 | payload_size + be32toh(metadata_struct->padding_size); |
7591bab1 MD |
1480 | DBG2("Relay metadata written. Updated metadata_received %" PRIu64, |
1481 | metadata_stream->metadata_received); | |
1d4dfdef | 1482 | |
7591bab1 MD |
1483 | end_put: |
1484 | pthread_mutex_unlock(&metadata_stream->lock); | |
1485 | stream_put(metadata_stream); | |
b8aa1682 JD |
1486 | end: |
1487 | return ret; | |
1488 | } | |
1489 | ||
1490 | /* | |
1491 | * relay_send_version: send relayd version number | |
1492 | */ | |
7591bab1 | 1493 | static int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1494 | struct relay_connection *conn) |
b8aa1682 | 1495 | { |
7f51dcba | 1496 | int ret; |
092b6259 | 1497 | struct lttcomm_relayd_version reply, msg; |
b8aa1682 | 1498 | |
58eb9381 | 1499 | conn->version_check_done = 1; |
b8aa1682 | 1500 | |
092b6259 | 1501 | /* Get version from the other side. */ |
58eb9381 | 1502 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
092b6259 | 1503 | if (ret < 0 || ret != sizeof(msg)) { |
a6cd2b97 DG |
1504 | if (ret == 0) { |
1505 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1506 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1507 | } else { |
1508 | ERR("Relay failed to receive the version values."); | |
1509 | } | |
092b6259 | 1510 | ret = -1; |
092b6259 DG |
1511 | goto end; |
1512 | } | |
1513 | ||
53efb85a | 1514 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
1515 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1516 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1517 | |
1518 | /* Major versions must be the same */ | |
1519 | if (reply.major != be32toh(msg.major)) { | |
6151a90f JD |
1520 | DBG("Incompatible major versions (%u vs %u), deleting session", |
1521 | reply.major, be32toh(msg.major)); | |
7591bab1 | 1522 | connection_put(conn); |
d4519fa3 JD |
1523 | ret = 0; |
1524 | goto end; | |
1525 | } | |
1526 | ||
58eb9381 | 1527 | conn->major = reply.major; |
0f907de1 JD |
1528 | /* We adapt to the lowest compatible version */ |
1529 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 1530 | conn->minor = reply.minor; |
0f907de1 | 1531 | } else { |
58eb9381 | 1532 | conn->minor = be32toh(msg.minor); |
0f907de1 JD |
1533 | } |
1534 | ||
6151a90f JD |
1535 | reply.major = htobe32(reply.major); |
1536 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 1537 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
6151a90f JD |
1538 | sizeof(struct lttcomm_relayd_version), 0); |
1539 | if (ret < 0) { | |
1540 | ERR("Relay sending version"); | |
1541 | } | |
1542 | ||
58eb9381 DG |
1543 | DBG("Version check done using protocol %u.%u", conn->major, |
1544 | conn->minor); | |
b8aa1682 JD |
1545 | |
1546 | end: | |
1547 | return ret; | |
1548 | } | |
1549 | ||
c8f59ee5 | 1550 | /* |
6d805429 | 1551 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 | 1552 | */ |
7591bab1 | 1553 | static int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1554 | struct relay_connection *conn) |
c8f59ee5 | 1555 | { |
58eb9381 | 1556 | struct relay_session *session = conn->session; |
6d805429 | 1557 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1558 | struct lttcomm_relayd_generic_reply reply; |
1559 | struct relay_stream *stream; | |
1560 | int ret; | |
c8f59ee5 DG |
1561 | uint64_t last_net_seq_num, stream_id; |
1562 | ||
6d805429 | 1563 | DBG("Data pending command received"); |
c8f59ee5 | 1564 | |
58eb9381 | 1565 | if (!session || conn->version_check_done == 0) { |
c8f59ee5 DG |
1566 | ERR("Trying to check for data before version check"); |
1567 | ret = -1; | |
1568 | goto end_no_session; | |
1569 | } | |
1570 | ||
58eb9381 | 1571 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
c8f59ee5 | 1572 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1573 | if (ret == 0) { |
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 valid data_pending struct size : %d", | |
1578 | ret); | |
1579 | } | |
c8f59ee5 DG |
1580 | ret = -1; |
1581 | goto end_no_session; | |
1582 | } | |
1583 | ||
1584 | stream_id = be64toh(msg.stream_id); | |
1585 | last_net_seq_num = be64toh(msg.last_net_seq_num); | |
1586 | ||
7591bab1 | 1587 | stream = stream_get_by_id(stream_id); |
de91f48a | 1588 | if (stream == NULL) { |
c8f59ee5 | 1589 | ret = -1; |
7591bab1 | 1590 | goto end; |
c8f59ee5 DG |
1591 | } |
1592 | ||
7591bab1 MD |
1593 | pthread_mutex_lock(&stream->lock); |
1594 | ||
6d805429 | 1595 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
c8f59ee5 DG |
1596 | " and last_seq %" PRIu64, stream_id, stream->prev_seq, |
1597 | last_net_seq_num); | |
1598 | ||
33832e64 | 1599 | /* Avoid wrapping issue */ |
39df6d9f | 1600 | if (((int64_t) (stream->prev_seq - last_net_seq_num)) >= 0) { |
6d805429 | 1601 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1602 | ret = 0; |
6d805429 DG |
1603 | } else { |
1604 | /* Data still being streamed thus pending */ | |
1605 | ret = 1; | |
c8f59ee5 DG |
1606 | } |
1607 | ||
7591bab1 MD |
1608 | stream->data_pending_check_done = true; |
1609 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 1610 | |
7591bab1 MD |
1611 | stream_put(stream); |
1612 | end: | |
c8f59ee5 | 1613 | |
53efb85a | 1614 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1615 | reply.ret_code = htobe32(ret); |
58eb9381 | 1616 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1617 | if (ret < 0) { |
6d805429 | 1618 | ERR("Relay data pending ret code failed"); |
c8f59ee5 DG |
1619 | } |
1620 | ||
1621 | end_no_session: | |
1622 | return ret; | |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | * Wait for the control socket to reach a quiescent state. | |
1627 | * | |
7591bab1 MD |
1628 | * Note that for now, when receiving this command from the session |
1629 | * daemon, this means that every subsequent commands or data received on | |
1630 | * the control socket has been handled. So, this is why we simply return | |
1631 | * OK here. | |
c8f59ee5 | 1632 | */ |
7591bab1 | 1633 | static int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1634 | struct relay_connection *conn) |
c8f59ee5 DG |
1635 | { |
1636 | int ret; | |
ad7051c0 DG |
1637 | uint64_t stream_id; |
1638 | struct relay_stream *stream; | |
ad7051c0 | 1639 | struct lttcomm_relayd_quiescent_control msg; |
c8f59ee5 DG |
1640 | struct lttcomm_relayd_generic_reply reply; |
1641 | ||
1642 | DBG("Checking quiescent state on control socket"); | |
1643 | ||
58eb9381 | 1644 | if (!conn->session || conn->version_check_done == 0) { |
ad7051c0 DG |
1645 | ERR("Trying to check for data before version check"); |
1646 | ret = -1; | |
1647 | goto end_no_session; | |
1648 | } | |
1649 | ||
58eb9381 | 1650 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
ad7051c0 | 1651 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1652 | if (ret == 0) { |
1653 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1654 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1655 | } else { |
1656 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1657 | ret); | |
1658 | } | |
ad7051c0 DG |
1659 | ret = -1; |
1660 | goto end_no_session; | |
1661 | } | |
1662 | ||
1663 | stream_id = be64toh(msg.stream_id); | |
7591bab1 MD |
1664 | stream = stream_get_by_id(stream_id); |
1665 | if (!stream) { | |
1666 | goto reply; | |
1667 | } | |
1668 | pthread_mutex_lock(&stream->lock); | |
1669 | stream->data_pending_check_done = true; | |
1670 | pthread_mutex_unlock(&stream->lock); | |
1671 | DBG("Relay quiescent control pending flag set to %" PRIu64, stream_id); | |
1672 | stream_put(stream); | |
1673 | reply: | |
53efb85a | 1674 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1675 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 1676 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c8f59ee5 | 1677 | if (ret < 0) { |
6d805429 | 1678 | ERR("Relay data quiescent control ret code failed"); |
c8f59ee5 DG |
1679 | } |
1680 | ||
ad7051c0 | 1681 | end_no_session: |
c8f59ee5 DG |
1682 | return ret; |
1683 | } | |
1684 | ||
f7079f67 | 1685 | /* |
7591bab1 MD |
1686 | * Initialize a data pending command. This means that a consumer is about |
1687 | * to ask for data pending for each stream it holds. Simply iterate over | |
1688 | * all streams of a session and set the data_pending_check_done flag. | |
f7079f67 DG |
1689 | * |
1690 | * This command returns to the client a LTTNG_OK code. | |
1691 | */ | |
7591bab1 | 1692 | static int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1693 | struct relay_connection *conn) |
f7079f67 DG |
1694 | { |
1695 | int ret; | |
1696 | struct lttng_ht_iter iter; | |
1697 | struct lttcomm_relayd_begin_data_pending msg; | |
1698 | struct lttcomm_relayd_generic_reply reply; | |
1699 | struct relay_stream *stream; | |
1700 | uint64_t session_id; | |
1701 | ||
1702 | assert(recv_hdr); | |
58eb9381 | 1703 | assert(conn); |
f7079f67 DG |
1704 | |
1705 | DBG("Init streams for data pending"); | |
1706 | ||
58eb9381 | 1707 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1708 | ERR("Trying to check for data before version check"); |
1709 | ret = -1; | |
1710 | goto end_no_session; | |
1711 | } | |
1712 | ||
58eb9381 | 1713 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1714 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1715 | if (ret == 0) { |
1716 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1717 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1718 | } else { |
1719 | ERR("Relay didn't receive valid begin data_pending struct size: %d", | |
1720 | ret); | |
1721 | } | |
f7079f67 DG |
1722 | ret = -1; |
1723 | goto end_no_session; | |
1724 | } | |
1725 | ||
1726 | session_id = be64toh(msg.session_id); | |
1727 | ||
1728 | /* | |
7591bab1 MD |
1729 | * Iterate over all streams to set the begin data pending flag. |
1730 | * For now, the streams are indexed by stream handle so we have | |
1731 | * to iterate over all streams to find the one associated with | |
1732 | * the right session_id. | |
f7079f67 DG |
1733 | */ |
1734 | rcu_read_lock(); | |
d3e2ba59 | 1735 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1736 | node.node) { |
7591bab1 MD |
1737 | if (!stream_get(stream)) { |
1738 | continue; | |
1739 | } | |
1740 | if (stream->trace->session->id == session_id) { | |
1741 | pthread_mutex_lock(&stream->lock); | |
1742 | stream->data_pending_check_done = false; | |
1743 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 DG |
1744 | DBG("Set begin data pending flag to stream %" PRIu64, |
1745 | stream->stream_handle); | |
1746 | } | |
7591bab1 | 1747 | stream_put(stream); |
f7079f67 DG |
1748 | } |
1749 | rcu_read_unlock(); | |
1750 | ||
53efb85a | 1751 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1752 | /* All good, send back reply. */ |
1753 | reply.ret_code = htobe32(LTTNG_OK); | |
1754 | ||
58eb9381 | 1755 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1756 | if (ret < 0) { |
1757 | ERR("Relay begin data pending send reply failed"); | |
1758 | } | |
1759 | ||
1760 | end_no_session: | |
1761 | return ret; | |
1762 | } | |
1763 | ||
1764 | /* | |
7591bab1 MD |
1765 | * End data pending command. This will check, for a given session id, if |
1766 | * each stream associated with it has its data_pending_check_done flag | |
1767 | * set. If not, this means that the client lost track of the stream but | |
1768 | * the data is still being streamed on our side. In this case, we inform | |
1769 | * the client that data is in flight. | |
f7079f67 DG |
1770 | * |
1771 | * Return to the client if there is data in flight or not with a ret_code. | |
1772 | */ | |
7591bab1 | 1773 | static int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1774 | struct relay_connection *conn) |
f7079f67 DG |
1775 | { |
1776 | int ret; | |
1777 | struct lttng_ht_iter iter; | |
1778 | struct lttcomm_relayd_end_data_pending msg; | |
1779 | struct lttcomm_relayd_generic_reply reply; | |
1780 | struct relay_stream *stream; | |
1781 | uint64_t session_id; | |
1782 | uint32_t is_data_inflight = 0; | |
1783 | ||
f7079f67 DG |
1784 | DBG("End data pending command"); |
1785 | ||
58eb9381 | 1786 | if (!conn->session || conn->version_check_done == 0) { |
f7079f67 DG |
1787 | ERR("Trying to check for data before version check"); |
1788 | ret = -1; | |
1789 | goto end_no_session; | |
1790 | } | |
1791 | ||
58eb9381 | 1792 | ret = conn->sock->ops->recvmsg(conn->sock, &msg, sizeof(msg), 0); |
f7079f67 | 1793 | if (ret < sizeof(msg)) { |
a6cd2b97 DG |
1794 | if (ret == 0) { |
1795 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1796 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 DG |
1797 | } else { |
1798 | ERR("Relay didn't receive valid end data_pending struct size: %d", | |
1799 | ret); | |
1800 | } | |
f7079f67 DG |
1801 | ret = -1; |
1802 | goto end_no_session; | |
1803 | } | |
1804 | ||
1805 | session_id = be64toh(msg.session_id); | |
1806 | ||
7591bab1 MD |
1807 | /* |
1808 | * Iterate over all streams to see if the begin data pending | |
1809 | * flag is set. | |
1810 | */ | |
f7079f67 | 1811 | rcu_read_lock(); |
d3e2ba59 | 1812 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1813 | node.node) { |
7591bab1 MD |
1814 | if (!stream_get(stream)) { |
1815 | continue; | |
1816 | } | |
1817 | if (stream->trace->session->id != session_id) { | |
1818 | stream_put(stream); | |
1819 | continue; | |
1820 | } | |
1821 | pthread_mutex_lock(&stream->lock); | |
1822 | if (!stream->data_pending_check_done) { | |
1823 | if (!stream->closed || !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
1824 | is_data_inflight = 1; | |
1825 | DBG("Data is still in flight for stream %" PRIu64, | |
1826 | stream->stream_handle); | |
1827 | pthread_mutex_unlock(&stream->lock); | |
1828 | stream_put(stream); | |
1829 | break; | |
1830 | } | |
f7079f67 | 1831 | } |
7591bab1 MD |
1832 | pthread_mutex_unlock(&stream->lock); |
1833 | stream_put(stream); | |
f7079f67 DG |
1834 | } |
1835 | rcu_read_unlock(); | |
1836 | ||
53efb85a | 1837 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1838 | /* All good, send back reply. */ |
1839 | reply.ret_code = htobe32(is_data_inflight); | |
1840 | ||
58eb9381 | 1841 | ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
f7079f67 DG |
1842 | if (ret < 0) { |
1843 | ERR("Relay end data pending send reply failed"); | |
1844 | } | |
1845 | ||
1846 | end_no_session: | |
1847 | return ret; | |
1848 | } | |
1849 | ||
1c20f0e2 JD |
1850 | /* |
1851 | * Receive an index for a specific stream. | |
1852 | * | |
1853 | * Return 0 on success else a negative value. | |
1854 | */ | |
7591bab1 | 1855 | static int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1856 | struct relay_connection *conn) |
1c20f0e2 | 1857 | { |
7591bab1 | 1858 | int ret, send_ret; |
58eb9381 | 1859 | struct relay_session *session = conn->session; |
1c20f0e2 | 1860 | struct lttcomm_relayd_index index_info; |
7591bab1 | 1861 | struct relay_index *index; |
1c20f0e2 JD |
1862 | struct lttcomm_relayd_generic_reply reply; |
1863 | struct relay_stream *stream; | |
1864 | uint64_t net_seq_num; | |
1865 | ||
58eb9381 | 1866 | assert(conn); |
1c20f0e2 JD |
1867 | |
1868 | DBG("Relay receiving index"); | |
1869 | ||
58eb9381 | 1870 | if (!session || conn->version_check_done == 0) { |
1c20f0e2 JD |
1871 | ERR("Trying to close a stream before version check"); |
1872 | ret = -1; | |
1873 | goto end_no_session; | |
1874 | } | |
1875 | ||
58eb9381 | 1876 | ret = conn->sock->ops->recvmsg(conn->sock, &index_info, |
1c20f0e2 JD |
1877 | sizeof(index_info), 0); |
1878 | if (ret < sizeof(index_info)) { | |
1879 | if (ret == 0) { | |
1880 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 1881 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
1c20f0e2 JD |
1882 | } else { |
1883 | ERR("Relay didn't receive valid index struct size : %d", ret); | |
1884 | } | |
1885 | ret = -1; | |
1886 | goto end_no_session; | |
1887 | } | |
1888 | ||
1889 | net_seq_num = be64toh(index_info.net_seq_num); | |
1890 | ||
7591bab1 | 1891 | stream = stream_get_by_id(be64toh(index_info.relay_stream_id)); |
1c20f0e2 | 1892 | if (!stream) { |
7591bab1 | 1893 | ERR("stream_get_by_id not found"); |
1c20f0e2 | 1894 | ret = -1; |
7591bab1 | 1895 | goto end; |
1c20f0e2 | 1896 | } |
7591bab1 | 1897 | pthread_mutex_lock(&stream->lock); |
1c20f0e2 | 1898 | |
d3e2ba59 JD |
1899 | /* Live beacon handling */ |
1900 | if (index_info.packet_size == 0) { | |
7591bab1 MD |
1901 | DBG("Received live beacon for stream %" PRIu64, |
1902 | stream->stream_handle); | |
d3e2ba59 JD |
1903 | |
1904 | /* | |
7591bab1 MD |
1905 | * Only flag a stream inactive when it has already |
1906 | * received data and no indexes are in flight. | |
d3e2ba59 | 1907 | */ |
a44ca2ca | 1908 | if (stream->index_received_seqcount > 0 |
7591bab1 MD |
1909 | && stream->indexes_in_flight == 0) { |
1910 | stream->beacon_ts_end = | |
1911 | be64toh(index_info.timestamp_end); | |
d3e2ba59 JD |
1912 | } |
1913 | ret = 0; | |
7591bab1 | 1914 | goto end_stream_put; |
d3e2ba59 JD |
1915 | } else { |
1916 | stream->beacon_ts_end = -1ULL; | |
1917 | } | |
1918 | ||
528f2ffa JD |
1919 | if (stream->ctf_stream_id == -1ULL) { |
1920 | stream->ctf_stream_id = be64toh(index_info.stream_id); | |
1921 | } | |
7591bab1 MD |
1922 | index = relay_index_get_by_id_or_create(stream, net_seq_num); |
1923 | if (!index) { | |
1924 | ret = -1; | |
1925 | ERR("relay_index_get_by_id_or_create index NULL"); | |
1926 | goto end_stream_put; | |
1c20f0e2 | 1927 | } |
7591bab1 MD |
1928 | if (set_index_control_data(index, &index_info)) { |
1929 | ERR("set_index_control_data error"); | |
1930 | relay_index_put(index); | |
1931 | ret = -1; | |
1932 | goto end_stream_put; | |
1933 | } | |
1934 | ret = relay_index_try_flush(index); | |
1935 | if (ret == 0) { | |
a44ca2ca MD |
1936 | tracefile_array_commit_seq(stream->tfa); |
1937 | stream->index_received_seqcount++; | |
7591bab1 MD |
1938 | } else if (ret > 0) { |
1939 | /* no flush. */ | |
1940 | ret = 0; | |
1941 | } else { | |
1942 | ERR("relay_index_try_flush error %d", ret); | |
1943 | relay_index_put(index); | |
1944 | ret = -1; | |
1c20f0e2 JD |
1945 | } |
1946 | ||
7591bab1 MD |
1947 | end_stream_put: |
1948 | pthread_mutex_unlock(&stream->lock); | |
1949 | stream_put(stream); | |
1950 | ||
1951 | end: | |
1c20f0e2 | 1952 | |
53efb85a | 1953 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
1954 | if (ret < 0) { |
1955 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1956 | } else { | |
1957 | reply.ret_code = htobe32(LTTNG_OK); | |
1958 | } | |
58eb9381 | 1959 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1c20f0e2 JD |
1960 | if (send_ret < 0) { |
1961 | ERR("Relay sending close index id reply"); | |
1962 | ret = send_ret; | |
1963 | } | |
1964 | ||
1965 | end_no_session: | |
1966 | return ret; | |
1967 | } | |
1968 | ||
a4baae1b JD |
1969 | /* |
1970 | * Receive the streams_sent message. | |
1971 | * | |
1972 | * Return 0 on success else a negative value. | |
1973 | */ | |
7591bab1 | 1974 | static int relay_streams_sent(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 1975 | struct relay_connection *conn) |
a4baae1b JD |
1976 | { |
1977 | int ret, send_ret; | |
1978 | struct lttcomm_relayd_generic_reply reply; | |
1979 | ||
58eb9381 | 1980 | assert(conn); |
a4baae1b JD |
1981 | |
1982 | DBG("Relay receiving streams_sent"); | |
1983 | ||
58eb9381 | 1984 | if (!conn->session || conn->version_check_done == 0) { |
a4baae1b JD |
1985 | ERR("Trying to close a stream before version check"); |
1986 | ret = -1; | |
1987 | goto end_no_session; | |
1988 | } | |
1989 | ||
1990 | /* | |
7591bab1 MD |
1991 | * Publish every pending stream in the connection recv list which are |
1992 | * now ready to be used by the viewer. | |
4a9daf17 | 1993 | */ |
7591bab1 | 1994 | publish_connection_local_streams(conn); |
4a9daf17 | 1995 | |
53efb85a | 1996 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 1997 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 1998 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
a4baae1b JD |
1999 | if (send_ret < 0) { |
2000 | ERR("Relay sending sent_stream reply"); | |
2001 | ret = send_ret; | |
2002 | } else { | |
2003 | /* Success. */ | |
2004 | ret = 0; | |
2005 | } | |
2006 | ||
2007 | end_no_session: | |
2008 | return ret; | |
2009 | } | |
2010 | ||
b8aa1682 | 2011 | /* |
d3e2ba59 | 2012 | * Process the commands received on the control socket |
b8aa1682 | 2013 | */ |
7591bab1 | 2014 | static int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, |
58eb9381 | 2015 | struct relay_connection *conn) |
b8aa1682 JD |
2016 | { |
2017 | int ret = 0; | |
2018 | ||
2019 | switch (be32toh(recv_hdr->cmd)) { | |
b8aa1682 | 2020 | case RELAYD_CREATE_SESSION: |
58eb9381 | 2021 | ret = relay_create_session(recv_hdr, conn); |
b8aa1682 | 2022 | break; |
b8aa1682 | 2023 | case RELAYD_ADD_STREAM: |
58eb9381 | 2024 | ret = relay_add_stream(recv_hdr, conn); |
b8aa1682 JD |
2025 | break; |
2026 | case RELAYD_START_DATA: | |
58eb9381 | 2027 | ret = relay_start(recv_hdr, conn); |
b8aa1682 JD |
2028 | break; |
2029 | case RELAYD_SEND_METADATA: | |
58eb9381 | 2030 | ret = relay_recv_metadata(recv_hdr, conn); |
b8aa1682 JD |
2031 | break; |
2032 | case RELAYD_VERSION: | |
58eb9381 | 2033 | ret = relay_send_version(recv_hdr, conn); |
b8aa1682 | 2034 | break; |
173af62f | 2035 | case RELAYD_CLOSE_STREAM: |
58eb9381 | 2036 | ret = relay_close_stream(recv_hdr, conn); |
173af62f | 2037 | break; |
6d805429 | 2038 | case RELAYD_DATA_PENDING: |
58eb9381 | 2039 | ret = relay_data_pending(recv_hdr, conn); |
c8f59ee5 DG |
2040 | break; |
2041 | case RELAYD_QUIESCENT_CONTROL: | |
58eb9381 | 2042 | ret = relay_quiescent_control(recv_hdr, conn); |
c8f59ee5 | 2043 | break; |
f7079f67 | 2044 | case RELAYD_BEGIN_DATA_PENDING: |
58eb9381 | 2045 | ret = relay_begin_data_pending(recv_hdr, conn); |
f7079f67 DG |
2046 | break; |
2047 | case RELAYD_END_DATA_PENDING: | |
58eb9381 | 2048 | ret = relay_end_data_pending(recv_hdr, conn); |
f7079f67 | 2049 | break; |
1c20f0e2 | 2050 | case RELAYD_SEND_INDEX: |
58eb9381 | 2051 | ret = relay_recv_index(recv_hdr, conn); |
1c20f0e2 | 2052 | break; |
a4baae1b | 2053 | case RELAYD_STREAMS_SENT: |
58eb9381 | 2054 | ret = relay_streams_sent(recv_hdr, conn); |
a4baae1b | 2055 | break; |
b8aa1682 JD |
2056 | case RELAYD_UPDATE_SYNC_INFO: |
2057 | default: | |
2058 | ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd)); | |
58eb9381 | 2059 | relay_unknown_command(conn); |
b8aa1682 JD |
2060 | ret = -1; |
2061 | goto end; | |
2062 | } | |
2063 | ||
2064 | end: | |
2065 | return ret; | |
2066 | } | |
2067 | ||
7d2f7452 DG |
2068 | /* |
2069 | * Handle index for a data stream. | |
2070 | * | |
7591bab1 | 2071 | * Called with the stream lock held. |
7d2f7452 DG |
2072 | * |
2073 | * Return 0 on success else a negative value. | |
2074 | */ | |
2075 | static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num, | |
2076 | int rotate_index) | |
2077 | { | |
7591bab1 MD |
2078 | int ret = 0; |
2079 | uint64_t data_offset; | |
2080 | struct relay_index *index; | |
7d2f7452 | 2081 | |
7d2f7452 DG |
2082 | /* Get data offset because we are about to update the index. */ |
2083 | data_offset = htobe64(stream->tracefile_size_current); | |
2084 | ||
65d66b19 MD |
2085 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, |
2086 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
7591bab1 | 2087 | |
7d2f7452 | 2088 | /* |
7591bab1 MD |
2089 | * Lookup for an existing index for that stream id/sequence |
2090 | * number. If it exists, the control thread has already received the | |
2091 | * data for it, thus we need to write it to disk. | |
7d2f7452 | 2092 | */ |
7591bab1 | 2093 | index = relay_index_get_by_id_or_create(stream, net_seq_num); |
7d2f7452 | 2094 | if (!index) { |
7591bab1 MD |
2095 | ret = -1; |
2096 | goto end; | |
7d2f7452 DG |
2097 | } |
2098 | ||
7591bab1 MD |
2099 | if (rotate_index || !stream->index_fd) { |
2100 | int fd; | |
2101 | ||
2102 | /* Put ref on previous index_fd. */ | |
2103 | if (stream->index_fd) { | |
2104 | stream_fd_put(stream->index_fd); | |
2105 | stream->index_fd = NULL; | |
7d2f7452 | 2106 | } |
7d2f7452 | 2107 | |
7591bab1 MD |
2108 | fd = index_create_file(stream->path_name, stream->channel_name, |
2109 | -1, -1, stream->tracefile_size, | |
a44ca2ca | 2110 | tracefile_array_get_file_index_head(stream->tfa)); |
7591bab1 MD |
2111 | if (fd < 0) { |
2112 | ret = -1; | |
2113 | /* Put self-ref for this index due to error. */ | |
2114 | relay_index_put(index); | |
2115 | goto end; | |
2116 | } | |
2117 | stream->index_fd = stream_fd_create(fd); | |
2118 | if (!stream->index_fd) { | |
2119 | ret = -1; | |
2120 | if (close(fd)) { | |
2121 | PERROR("Error closing FD %d", fd); | |
2122 | } | |
2123 | /* Put self-ref for this index due to error. */ | |
2124 | relay_index_put(index); | |
2125 | /* Will put the local ref. */ | |
2126 | goto end; | |
7d2f7452 | 2127 | } |
7d2f7452 DG |
2128 | } |
2129 | ||
7591bab1 MD |
2130 | if (relay_index_set_fd(index, stream->index_fd, data_offset)) { |
2131 | ret = -1; | |
2132 | /* Put self-ref for this index due to error. */ | |
2133 | relay_index_put(index); | |
2134 | goto end; | |
7d2f7452 DG |
2135 | } |
2136 | ||
7591bab1 MD |
2137 | ret = relay_index_try_flush(index); |
2138 | if (ret == 0) { | |
a44ca2ca MD |
2139 | tracefile_array_commit_seq(stream->tfa); |
2140 | stream->index_received_seqcount++; | |
7591bab1 MD |
2141 | } else if (ret > 0) { |
2142 | /* No flush. */ | |
2143 | ret = 0; | |
2144 | } else { | |
2145 | /* Put self-ref for this index due to error. */ | |
2146 | relay_index_put(index); | |
2147 | ret = -1; | |
2148 | } | |
2149 | end: | |
7d2f7452 DG |
2150 | return ret; |
2151 | } | |
2152 | ||
b8aa1682 JD |
2153 | /* |
2154 | * relay_process_data: Process the data received on the data socket | |
2155 | */ | |
7591bab1 | 2156 | static int relay_process_data(struct relay_connection *conn) |
b8aa1682 | 2157 | { |
7d2f7452 | 2158 | int ret = 0, rotate_index = 0; |
6cd525e8 | 2159 | ssize_t size_ret; |
b8aa1682 JD |
2160 | struct relay_stream *stream; |
2161 | struct lttcomm_relayd_data_hdr data_hdr; | |
7d2f7452 | 2162 | uint64_t stream_id; |
173af62f | 2163 | uint64_t net_seq_num; |
b8aa1682 | 2164 | uint32_t data_size; |
2a174661 | 2165 | struct relay_session *session; |
bda7c7b9 | 2166 | bool new_stream = false, close_requested = false; |
b8aa1682 | 2167 | |
58eb9381 | 2168 | ret = conn->sock->ops->recvmsg(conn->sock, &data_hdr, |
7c5aef62 | 2169 | sizeof(struct lttcomm_relayd_data_hdr), 0); |
b8aa1682 | 2170 | if (ret <= 0) { |
a6cd2b97 DG |
2171 | if (ret == 0) { |
2172 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2173 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
a6cd2b97 | 2174 | } else { |
58eb9381 | 2175 | ERR("Unable to receive data header on sock %d", conn->sock->fd); |
a6cd2b97 | 2176 | } |
b8aa1682 JD |
2177 | ret = -1; |
2178 | goto end; | |
2179 | } | |
2180 | ||
2181 | stream_id = be64toh(data_hdr.stream_id); | |
7591bab1 | 2182 | stream = stream_get_by_id(stream_id); |
b8aa1682 | 2183 | if (!stream) { |
65d66b19 | 2184 | ERR("relay_process_data: Cannot find stream %" PRIu64, stream_id); |
b8aa1682 | 2185 | ret = -1; |
7591bab1 | 2186 | goto end; |
b8aa1682 | 2187 | } |
7591bab1 | 2188 | session = stream->trace->session; |
b8aa1682 JD |
2189 | data_size = be32toh(data_hdr.data_size); |
2190 | if (data_buffer_size < data_size) { | |
c617c0c6 MD |
2191 | char *tmp_data_ptr; |
2192 | ||
2193 | tmp_data_ptr = realloc(data_buffer, data_size); | |
2194 | if (!tmp_data_ptr) { | |
b8aa1682 | 2195 | ERR("Allocating data buffer"); |
c617c0c6 | 2196 | free(data_buffer); |
b8aa1682 | 2197 | ret = -1; |
7591bab1 | 2198 | goto end_stream_put; |
b8aa1682 | 2199 | } |
c617c0c6 | 2200 | data_buffer = tmp_data_ptr; |
b8aa1682 JD |
2201 | data_buffer_size = data_size; |
2202 | } | |
2203 | memset(data_buffer, 0, data_size); | |
2204 | ||
173af62f DG |
2205 | net_seq_num = be64toh(data_hdr.net_seq_num); |
2206 | ||
77c7c900 | 2207 | DBG3("Receiving data of size %u for stream id %" PRIu64 " seqnum %" PRIu64, |
173af62f | 2208 | data_size, stream_id, net_seq_num); |
58eb9381 | 2209 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, data_size, 0); |
b8aa1682 | 2210 | if (ret <= 0) { |
a6cd2b97 DG |
2211 | if (ret == 0) { |
2212 | /* Orderly shutdown. Not necessary to print an error. */ | |
58eb9381 | 2213 | DBG("Socket %d did an orderly shutdown", conn->sock->fd); |
65d66b19 MD |
2214 | } else { |
2215 | ERR("Socket %d error %d", conn->sock->fd, ret); | |
a6cd2b97 | 2216 | } |
b8aa1682 | 2217 | ret = -1; |
7591bab1 | 2218 | goto end_stream_put; |
b8aa1682 JD |
2219 | } |
2220 | ||
7591bab1 MD |
2221 | pthread_mutex_lock(&stream->lock); |
2222 | ||
1c20f0e2 | 2223 | /* Check if a rotation is needed. */ |
0f907de1 JD |
2224 | if (stream->tracefile_size > 0 && |
2225 | (stream->tracefile_size_current + data_size) > | |
2226 | stream->tracefile_size) { | |
a44ca2ca MD |
2227 | uint64_t old_id, new_id; |
2228 | ||
2229 | old_id = tracefile_array_get_file_index_head(stream->tfa); | |
2230 | tracefile_array_file_rotate(stream->tfa); | |
2231 | ||
2232 | /* new_id is updated by utils_rotate_stream_file. */ | |
2233 | new_id = old_id; | |
6b6b9a5a | 2234 | |
7591bab1 MD |
2235 | ret = utils_rotate_stream_file(stream->path_name, |
2236 | stream->channel_name, stream->tracefile_size, | |
2237 | stream->tracefile_count, -1, | |
2238 | -1, stream->stream_fd->fd, | |
a44ca2ca | 2239 | &new_id, &stream->stream_fd->fd); |
0f907de1 | 2240 | if (ret < 0) { |
1c20f0e2 | 2241 | ERR("Rotating stream output file"); |
7591bab1 MD |
2242 | goto end_stream_unlock; |
2243 | } | |
7591bab1 MD |
2244 | /* |
2245 | * Reset current size because we just performed a stream | |
2246 | * rotation. | |
2247 | */ | |
a6976990 | 2248 | stream->tracefile_size_current = 0; |
1c20f0e2 JD |
2249 | rotate_index = 1; |
2250 | } | |
2251 | ||
1c20f0e2 | 2252 | /* |
7591bab1 MD |
2253 | * Index are handled in protocol version 2.4 and above. Also, |
2254 | * snapshot and index are NOT supported. | |
1c20f0e2 | 2255 | */ |
2a174661 | 2256 | if (session->minor >= 4 && !session->snapshot) { |
7d2f7452 | 2257 | ret = handle_index_data(stream, net_seq_num, rotate_index); |
1c20f0e2 | 2258 | if (ret < 0) { |
65d66b19 MD |
2259 | ERR("handle_index_data: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
2260 | stream->stream_handle, net_seq_num, ret); | |
7591bab1 | 2261 | goto end_stream_unlock; |
1c20f0e2 | 2262 | } |
1c20f0e2 JD |
2263 | } |
2264 | ||
7d2f7452 | 2265 | /* Write data to stream output fd. */ |
7591bab1 | 2266 | size_ret = lttng_write(stream->stream_fd->fd, data_buffer, data_size); |
6cd525e8 | 2267 | if (size_ret < data_size) { |
b8aa1682 JD |
2268 | ERR("Relay error writing data to file"); |
2269 | ret = -1; | |
7591bab1 | 2270 | goto end_stream_unlock; |
b8aa1682 | 2271 | } |
1d4dfdef | 2272 | |
7591bab1 MD |
2273 | DBG2("Relay wrote %zd bytes to tracefile for stream id %" PRIu64, |
2274 | size_ret, stream->stream_handle); | |
5ab7344e | 2275 | |
7591bab1 MD |
2276 | ret = write_padding_to_file(stream->stream_fd->fd, |
2277 | be32toh(data_hdr.padding_size)); | |
1d4dfdef | 2278 | if (ret < 0) { |
65d66b19 MD |
2279 | ERR("write_padding_to_file: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
2280 | stream->stream_handle, net_seq_num, ret); | |
7591bab1 | 2281 | goto end_stream_unlock; |
1d4dfdef | 2282 | } |
7591bab1 MD |
2283 | stream->tracefile_size_current += |
2284 | data_size + be32toh(data_hdr.padding_size); | |
c0bae11d MD |
2285 | if (stream->prev_seq == -1ULL) { |
2286 | new_stream = true; | |
2287 | } | |
2288 | ||
173af62f DG |
2289 | stream->prev_seq = net_seq_num; |
2290 | ||
7591bab1 | 2291 | end_stream_unlock: |
bda7c7b9 | 2292 | close_requested = stream->close_requested; |
7591bab1 | 2293 | pthread_mutex_unlock(&stream->lock); |
bda7c7b9 JG |
2294 | if (close_requested) { |
2295 | try_stream_close(stream); | |
2296 | } | |
2297 | ||
c0bae11d MD |
2298 | if (new_stream) { |
2299 | pthread_mutex_lock(&session->lock); | |
2300 | uatomic_set(&session->new_streams, 1); | |
2301 | pthread_mutex_unlock(&session->lock); | |
2302 | } | |
7591bab1 MD |
2303 | end_stream_put: |
2304 | stream_put(stream); | |
b8aa1682 JD |
2305 | end: |
2306 | return ret; | |
2307 | } | |
2308 | ||
7591bab1 | 2309 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
2310 | { |
2311 | int ret; | |
2312 | ||
58eb9381 | 2313 | (void) lttng_poll_del(events, pollfd); |
b8aa1682 JD |
2314 | |
2315 | ret = close(pollfd); | |
2316 | if (ret < 0) { | |
2317 | ERR("Closing pollfd %d", pollfd); | |
2318 | } | |
2319 | } | |
2320 | ||
7591bab1 MD |
2321 | static void relay_thread_close_connection(struct lttng_poll_event *events, |
2322 | int pollfd, struct relay_connection *conn) | |
9d1bbf21 | 2323 | { |
7591bab1 | 2324 | const char *type_str; |
2a174661 | 2325 | |
7591bab1 MD |
2326 | switch (conn->type) { |
2327 | case RELAY_DATA: | |
2328 | type_str = "Data"; | |
2329 | break; | |
2330 | case RELAY_CONTROL: | |
2331 | type_str = "Control"; | |
2332 | break; | |
2333 | case RELAY_VIEWER_COMMAND: | |
2334 | type_str = "Viewer Command"; | |
2335 | break; | |
2336 | case RELAY_VIEWER_NOTIFICATION: | |
2337 | type_str = "Viewer Notification"; | |
2338 | break; | |
2339 | default: | |
2340 | type_str = "Unknown"; | |
9d1bbf21 | 2341 | } |
7591bab1 MD |
2342 | cleanup_connection_pollfd(events, pollfd); |
2343 | connection_put(conn); | |
2344 | DBG("%s connection closed with %d", type_str, pollfd); | |
b8aa1682 JD |
2345 | } |
2346 | ||
2347 | /* | |
2348 | * This thread does the actual work | |
2349 | */ | |
7591bab1 | 2350 | static void *relay_thread_worker(void *data) |
b8aa1682 | 2351 | { |
beaad64c DG |
2352 | int ret, err = -1, last_seen_data_fd = -1; |
2353 | uint32_t nb_fd; | |
b8aa1682 JD |
2354 | struct lttng_poll_event events; |
2355 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 2356 | struct lttng_ht_iter iter; |
b8aa1682 | 2357 | struct lttcomm_relayd_hdr recv_hdr; |
90e7d72f | 2358 | struct relay_connection *destroy_conn = NULL; |
b8aa1682 JD |
2359 | |
2360 | DBG("[thread] Relay worker started"); | |
2361 | ||
9d1bbf21 MD |
2362 | rcu_register_thread(); |
2363 | ||
55706a7d MD |
2364 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
2365 | ||
9b5e0863 MD |
2366 | if (testpoint(relayd_thread_worker)) { |
2367 | goto error_testpoint; | |
2368 | } | |
2369 | ||
f385ae0a MD |
2370 | health_code_update(); |
2371 | ||
b8aa1682 JD |
2372 | /* table of connections indexed on socket */ |
2373 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2374 | if (!relay_connections_ht) { |
2375 | goto relay_connections_ht_error; | |
2376 | } | |
b8aa1682 | 2377 | |
b8aa1682 JD |
2378 | ret = create_thread_poll_set(&events, 2); |
2379 | if (ret < 0) { | |
2380 | goto error_poll_create; | |
2381 | } | |
2382 | ||
58eb9381 | 2383 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
2384 | if (ret < 0) { |
2385 | goto error; | |
2386 | } | |
2387 | ||
beaad64c | 2388 | restart: |
b8aa1682 | 2389 | while (1) { |
beaad64c DG |
2390 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2391 | ||
f385ae0a MD |
2392 | health_code_update(); |
2393 | ||
b8aa1682 | 2394 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2395 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 2396 | health_poll_entry(); |
b8aa1682 | 2397 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 2398 | health_poll_exit(); |
b8aa1682 JD |
2399 | if (ret < 0) { |
2400 | /* | |
2401 | * Restart interrupted system call. | |
2402 | */ | |
2403 | if (errno == EINTR) { | |
2404 | goto restart; | |
2405 | } | |
2406 | goto error; | |
2407 | } | |
2408 | ||
0d9c5d77 DG |
2409 | nb_fd = ret; |
2410 | ||
beaad64c | 2411 | /* |
7591bab1 MD |
2412 | * Process control. The control connection is |
2413 | * prioritized so we don't starve it with high | |
2414 | * throughput tracing data on the data connection. | |
beaad64c | 2415 | */ |
b8aa1682 JD |
2416 | for (i = 0; i < nb_fd; i++) { |
2417 | /* Fetch once the poll data */ | |
beaad64c DG |
2418 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2419 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 2420 | |
f385ae0a MD |
2421 | health_code_update(); |
2422 | ||
fd20dac9 | 2423 | if (!revents) { |
7591bab1 MD |
2424 | /* |
2425 | * No activity for this FD (poll | |
2426 | * implementation). | |
2427 | */ | |
fd20dac9 MD |
2428 | continue; |
2429 | } | |
2430 | ||
b8aa1682 JD |
2431 | /* Thread quit pipe has been closed. Killing thread. */ |
2432 | ret = check_thread_quit_pipe(pollfd, revents); | |
2433 | if (ret) { | |
095a4ae5 MD |
2434 | err = 0; |
2435 | goto exit; | |
b8aa1682 JD |
2436 | } |
2437 | ||
58eb9381 DG |
2438 | /* Inspect the relay conn pipe for new connection */ |
2439 | if (pollfd == relay_conn_pipe[0]) { | |
03e43155 | 2440 | if (revents & LPOLLIN) { |
90e7d72f JG |
2441 | struct relay_connection *conn; |
2442 | ||
58eb9381 | 2443 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
2444 | if (ret < 0) { |
2445 | goto error; | |
2446 | } | |
58eb9381 DG |
2447 | lttng_poll_add(&events, conn->sock->fd, |
2448 | LPOLLIN | LPOLLRDHUP); | |
7591bab1 | 2449 | connection_ht_add(relay_connections_ht, conn); |
58eb9381 | 2450 | DBG("Connection socket %d added", conn->sock->fd); |
03e43155 MD |
2451 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2452 | ERR("Relay connection pipe error"); | |
2453 | goto error; | |
2454 | } else { | |
2455 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2456 | goto error; | |
b8aa1682 | 2457 | } |
58eb9381 | 2458 | } else { |
90e7d72f JG |
2459 | struct relay_connection *ctrl_conn; |
2460 | ||
7591bab1 | 2461 | ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
58eb9381 | 2462 | /* If not found, there is a synchronization issue. */ |
90e7d72f | 2463 | assert(ctrl_conn); |
58eb9381 | 2464 | |
03e43155 MD |
2465 | if (ctrl_conn->type == RELAY_DATA) { |
2466 | if (revents & LPOLLIN) { | |
beaad64c DG |
2467 | /* |
2468 | * Flag the last seen data fd not deleted. It will be | |
2469 | * used as the last seen fd if any fd gets deleted in | |
2470 | * this first loop. | |
2471 | */ | |
2472 | last_notdel_data_fd = pollfd; | |
2473 | } | |
03e43155 MD |
2474 | goto put_ctrl_connection; |
2475 | } | |
2476 | assert(ctrl_conn->type == RELAY_CONTROL); | |
2477 | ||
2478 | if (revents & LPOLLIN) { | |
2479 | ret = ctrl_conn->sock->ops->recvmsg(ctrl_conn->sock, | |
2480 | &recv_hdr, sizeof(recv_hdr), 0); | |
2481 | if (ret <= 0) { | |
2482 | /* Connection closed */ | |
2483 | relay_thread_close_connection(&events, pollfd, | |
2484 | ctrl_conn); | |
2485 | } else { | |
2486 | ret = relay_process_control(&recv_hdr, ctrl_conn); | |
2487 | if (ret < 0) { | |
2488 | /* Clear the session on error. */ | |
2489 | relay_thread_close_connection(&events, | |
2490 | pollfd, ctrl_conn); | |
2491 | } | |
2492 | seen_control = 1; | |
2493 | } | |
2494 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2495 | relay_thread_close_connection(&events, | |
2496 | pollfd, ctrl_conn); | |
2497 | if (last_seen_data_fd == pollfd) { | |
2498 | last_seen_data_fd = last_notdel_data_fd; | |
2499 | } | |
58eb9381 | 2500 | } else { |
03e43155 MD |
2501 | ERR("Unexpected poll events %u for control sock %d", |
2502 | revents, pollfd); | |
2503 | connection_put(ctrl_conn); | |
2504 | goto error; | |
beaad64c | 2505 | } |
03e43155 | 2506 | put_ctrl_connection: |
7591bab1 | 2507 | connection_put(ctrl_conn); |
beaad64c DG |
2508 | } |
2509 | } | |
2510 | ||
2511 | /* | |
2512 | * The last loop handled a control request, go back to poll to make | |
2513 | * sure we prioritise the control socket. | |
2514 | */ | |
2515 | if (seen_control) { | |
2516 | continue; | |
2517 | } | |
2518 | ||
2519 | if (last_seen_data_fd >= 0) { | |
2520 | for (i = 0; i < nb_fd; i++) { | |
2521 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
2522 | |
2523 | health_code_update(); | |
2524 | ||
beaad64c DG |
2525 | if (last_seen_data_fd == pollfd) { |
2526 | idx = i; | |
2527 | break; | |
2528 | } | |
2529 | } | |
2530 | } | |
2531 | ||
2532 | /* Process data connection. */ | |
2533 | for (i = idx + 1; i < nb_fd; i++) { | |
2534 | /* Fetch the poll data. */ | |
2535 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2536 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
90e7d72f | 2537 | struct relay_connection *data_conn; |
beaad64c | 2538 | |
f385ae0a MD |
2539 | health_code_update(); |
2540 | ||
fd20dac9 MD |
2541 | if (!revents) { |
2542 | /* No activity for this FD (poll implementation). */ | |
2543 | continue; | |
2544 | } | |
2545 | ||
beaad64c | 2546 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 2547 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
2548 | continue; |
2549 | } | |
2550 | ||
7591bab1 | 2551 | data_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
90e7d72f | 2552 | if (!data_conn) { |
fd20dac9 | 2553 | /* Skip it. Might be removed before. */ |
fd20dac9 MD |
2554 | continue; |
2555 | } | |
03e43155 MD |
2556 | if (data_conn->type == RELAY_CONTROL) { |
2557 | goto put_data_connection; | |
2558 | } | |
2559 | assert(data_conn->type == RELAY_DATA); | |
fd20dac9 MD |
2560 | |
2561 | if (revents & LPOLLIN) { | |
90e7d72f | 2562 | ret = relay_process_data(data_conn); |
fd20dac9 MD |
2563 | /* Connection closed */ |
2564 | if (ret < 0) { | |
7591bab1 | 2565 | relay_thread_close_connection(&events, pollfd, |
03e43155 | 2566 | data_conn); |
fd20dac9 MD |
2567 | /* |
2568 | * Every goto restart call sets the last seen fd where | |
2569 | * here we don't really care since we gracefully | |
2570 | * continue the loop after the connection is deleted. | |
2571 | */ | |
2572 | } else { | |
2573 | /* Keep last seen port. */ | |
2574 | last_seen_data_fd = pollfd; | |
7591bab1 | 2575 | connection_put(data_conn); |
fd20dac9 | 2576 | goto restart; |
b8aa1682 | 2577 | } |
03e43155 MD |
2578 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2579 | relay_thread_close_connection(&events, pollfd, | |
2580 | data_conn); | |
2581 | } else { | |
2582 | ERR("Unknown poll events %u for data sock %d", | |
2583 | revents, pollfd); | |
b8aa1682 | 2584 | } |
03e43155 | 2585 | put_data_connection: |
7591bab1 | 2586 | connection_put(data_conn); |
b8aa1682 | 2587 | } |
beaad64c | 2588 | last_seen_data_fd = -1; |
b8aa1682 JD |
2589 | } |
2590 | ||
f385ae0a MD |
2591 | /* Normal exit, no error */ |
2592 | ret = 0; | |
2593 | ||
095a4ae5 | 2594 | exit: |
b8aa1682 | 2595 | error: |
58eb9381 | 2596 | /* Cleanup reamaining connection object. */ |
9d1bbf21 | 2597 | rcu_read_lock(); |
90e7d72f JG |
2598 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, |
2599 | destroy_conn, | |
58eb9381 | 2600 | sock_n.node) { |
f385ae0a | 2601 | health_code_update(); |
7591bab1 MD |
2602 | /* |
2603 | * No need to grab another ref, because we own | |
2604 | * destroy_conn. | |
2605 | */ | |
2606 | relay_thread_close_connection(&events, destroy_conn->sock->fd, | |
2607 | destroy_conn); | |
b8aa1682 | 2608 | } |
94d49140 | 2609 | rcu_read_unlock(); |
7591bab1 MD |
2610 | |
2611 | lttng_poll_clean(&events); | |
7d2f7452 | 2612 | error_poll_create: |
b8aa1682 | 2613 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 2614 | relay_connections_ht_error: |
58eb9381 DG |
2615 | /* Close relay conn pipes */ |
2616 | utils_close_pipe(relay_conn_pipe); | |
095a4ae5 MD |
2617 | if (err) { |
2618 | DBG("Thread exited with error"); | |
2619 | } | |
b8aa1682 | 2620 | DBG("Worker thread cleanup complete"); |
095a4ae5 | 2621 | free(data_buffer); |
9b5e0863 | 2622 | error_testpoint: |
f385ae0a MD |
2623 | if (err) { |
2624 | health_error(); | |
2625 | ERR("Health error occurred in %s", __func__); | |
2626 | } | |
2627 | health_unregister(health_relayd); | |
9d1bbf21 | 2628 | rcu_unregister_thread(); |
b4aacfdc | 2629 | lttng_relay_stop_threads(); |
b8aa1682 JD |
2630 | return NULL; |
2631 | } | |
2632 | ||
2633 | /* | |
2634 | * Create the relay command pipe to wake thread_manage_apps. | |
2635 | * Closed in cleanup(). | |
2636 | */ | |
58eb9381 | 2637 | static int create_relay_conn_pipe(void) |
b8aa1682 | 2638 | { |
a02de639 | 2639 | int ret; |
b8aa1682 | 2640 | |
58eb9381 | 2641 | ret = utils_create_pipe_cloexec(relay_conn_pipe); |
b8aa1682 | 2642 | |
b8aa1682 JD |
2643 | return ret; |
2644 | } | |
2645 | ||
2646 | /* | |
2647 | * main | |
2648 | */ | |
2649 | int main(int argc, char **argv) | |
2650 | { | |
178a0557 | 2651 | int ret = 0, retval = 0; |
b8aa1682 JD |
2652 | void *status; |
2653 | ||
b8aa1682 JD |
2654 | /* Parse arguments */ |
2655 | progname = argv[0]; | |
178a0557 MD |
2656 | if (set_options(argc, argv)) { |
2657 | retval = -1; | |
2658 | goto exit_options; | |
b8aa1682 JD |
2659 | } |
2660 | ||
178a0557 MD |
2661 | if (set_signal_handler()) { |
2662 | retval = -1; | |
2663 | goto exit_options; | |
b8aa1682 JD |
2664 | } |
2665 | ||
4d513a50 DG |
2666 | /* Try to create directory if -o, --output is specified. */ |
2667 | if (opt_output_path) { | |
994fa64f DG |
2668 | if (*opt_output_path != '/') { |
2669 | ERR("Please specify an absolute path for -o, --output PATH"); | |
178a0557 MD |
2670 | retval = -1; |
2671 | goto exit_options; | |
994fa64f DG |
2672 | } |
2673 | ||
d77dded2 JG |
2674 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG, |
2675 | -1, -1); | |
4d513a50 DG |
2676 | if (ret < 0) { |
2677 | ERR("Unable to create %s", opt_output_path); | |
178a0557 MD |
2678 | retval = -1; |
2679 | goto exit_options; | |
4d513a50 DG |
2680 | } |
2681 | } | |
2682 | ||
b8aa1682 | 2683 | /* Daemonize */ |
b5218ffb | 2684 | if (opt_daemon || opt_background) { |
3fd27398 MD |
2685 | int i; |
2686 | ||
2687 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, | |
2688 | !opt_background); | |
b8aa1682 | 2689 | if (ret < 0) { |
178a0557 MD |
2690 | retval = -1; |
2691 | goto exit_options; | |
b8aa1682 | 2692 | } |
3fd27398 MD |
2693 | |
2694 | /* | |
2695 | * We are in the child. Make sure all other file | |
2696 | * descriptors are closed, in case we are called with | |
2697 | * more opened file descriptors than the standard ones. | |
2698 | */ | |
2699 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
2700 | (void) close(i); | |
2701 | } | |
2702 | } | |
2703 | ||
178a0557 MD |
2704 | |
2705 | /* Initialize thread health monitoring */ | |
2706 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
2707 | if (!health_relayd) { | |
2708 | PERROR("health_app_create error"); | |
2709 | retval = -1; | |
2710 | goto exit_health_app_create; | |
2711 | } | |
2712 | ||
3fd27398 | 2713 | /* Create thread quit pipe */ |
178a0557 MD |
2714 | if (init_thread_quit_pipe()) { |
2715 | retval = -1; | |
2716 | goto exit_init_data; | |
b8aa1682 JD |
2717 | } |
2718 | ||
1c20f0e2 | 2719 | /* Check if daemon is UID = 0 */ |
7591bab1 | 2720 | if (!getuid()) { |
8d5c808e | 2721 | if (control_uri->port < 1024 || data_uri->port < 1024 || live_uri->port < 1024) { |
b8aa1682 | 2722 | ERR("Need to be root to use ports < 1024"); |
178a0557 MD |
2723 | retval = -1; |
2724 | goto exit_init_data; | |
b8aa1682 JD |
2725 | } |
2726 | } | |
2727 | ||
2728 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2729 | if (create_relay_conn_pipe()) { |
2730 | retval = -1; | |
2731 | goto exit_init_data; | |
b8aa1682 JD |
2732 | } |
2733 | ||
2734 | /* Init relay command queue. */ | |
8bdee6e2 | 2735 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 JD |
2736 | |
2737 | /* Set up max poll set size */ | |
25b397f9 MD |
2738 | if (lttng_poll_set_max_size()) { |
2739 | retval = -1; | |
2740 | goto exit_init_data; | |
2741 | } | |
b8aa1682 | 2742 | |
554831e7 MD |
2743 | /* Initialize communication library */ |
2744 | lttcomm_init(); | |
87e45c13 | 2745 | lttcomm_inet_init(); |
554831e7 | 2746 | |
d3e2ba59 | 2747 | /* tables of sessions indexed by session ID */ |
7591bab1 MD |
2748 | sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2749 | if (!sessions_ht) { | |
178a0557 MD |
2750 | retval = -1; |
2751 | goto exit_init_data; | |
d3e2ba59 JD |
2752 | } |
2753 | ||
2754 | /* tables of streams indexed by stream ID */ | |
2a174661 | 2755 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 | 2756 | if (!relay_streams_ht) { |
178a0557 MD |
2757 | retval = -1; |
2758 | goto exit_init_data; | |
d3e2ba59 JD |
2759 | } |
2760 | ||
2761 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
2762 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2763 | if (!viewer_streams_ht) { | |
178a0557 MD |
2764 | retval = -1; |
2765 | goto exit_init_data; | |
55706a7d MD |
2766 | } |
2767 | ||
65931c8b | 2768 | ret = utils_create_pipe(health_quit_pipe); |
178a0557 MD |
2769 | if (ret) { |
2770 | retval = -1; | |
2771 | goto exit_health_quit_pipe; | |
65931c8b MD |
2772 | } |
2773 | ||
2774 | /* Create thread to manage the client socket */ | |
2775 | ret = pthread_create(&health_thread, NULL, | |
2776 | thread_manage_health, (void *) NULL); | |
178a0557 MD |
2777 | if (ret) { |
2778 | errno = ret; | |
65931c8b | 2779 | PERROR("pthread_create health"); |
178a0557 MD |
2780 | retval = -1; |
2781 | goto exit_health_thread; | |
65931c8b MD |
2782 | } |
2783 | ||
b8aa1682 JD |
2784 | /* Setup the dispatcher thread */ |
2785 | ret = pthread_create(&dispatcher_thread, NULL, | |
2786 | relay_thread_dispatcher, (void *) NULL); | |
178a0557 MD |
2787 | if (ret) { |
2788 | errno = ret; | |
b8aa1682 | 2789 | PERROR("pthread_create dispatcher"); |
178a0557 MD |
2790 | retval = -1; |
2791 | goto exit_dispatcher_thread; | |
b8aa1682 JD |
2792 | } |
2793 | ||
2794 | /* Setup the worker thread */ | |
2795 | ret = pthread_create(&worker_thread, NULL, | |
7591bab1 | 2796 | relay_thread_worker, NULL); |
178a0557 MD |
2797 | if (ret) { |
2798 | errno = ret; | |
b8aa1682 | 2799 | PERROR("pthread_create worker"); |
178a0557 MD |
2800 | retval = -1; |
2801 | goto exit_worker_thread; | |
b8aa1682 JD |
2802 | } |
2803 | ||
2804 | /* Setup the listener thread */ | |
2805 | ret = pthread_create(&listener_thread, NULL, | |
2806 | relay_thread_listener, (void *) NULL); | |
178a0557 MD |
2807 | if (ret) { |
2808 | errno = ret; | |
b8aa1682 | 2809 | PERROR("pthread_create listener"); |
178a0557 MD |
2810 | retval = -1; |
2811 | goto exit_listener_thread; | |
b8aa1682 JD |
2812 | } |
2813 | ||
7591bab1 | 2814 | ret = relayd_live_create(live_uri); |
178a0557 | 2815 | if (ret) { |
d3e2ba59 | 2816 | ERR("Starting live viewer threads"); |
178a0557 | 2817 | retval = -1; |
50138f51 | 2818 | goto exit_live; |
d3e2ba59 JD |
2819 | } |
2820 | ||
178a0557 MD |
2821 | /* |
2822 | * This is where we start awaiting program completion (e.g. through | |
2823 | * signal that asks threads to teardown). | |
2824 | */ | |
2825 | ||
2826 | ret = relayd_live_join(); | |
2827 | if (ret) { | |
2828 | retval = -1; | |
2829 | } | |
50138f51 | 2830 | exit_live: |
178a0557 | 2831 | |
b8aa1682 | 2832 | ret = pthread_join(listener_thread, &status); |
178a0557 MD |
2833 | if (ret) { |
2834 | errno = ret; | |
2835 | PERROR("pthread_join listener_thread"); | |
2836 | retval = -1; | |
b8aa1682 JD |
2837 | } |
2838 | ||
178a0557 | 2839 | exit_listener_thread: |
b8aa1682 | 2840 | ret = pthread_join(worker_thread, &status); |
178a0557 MD |
2841 | if (ret) { |
2842 | errno = ret; | |
2843 | PERROR("pthread_join worker_thread"); | |
2844 | retval = -1; | |
b8aa1682 JD |
2845 | } |
2846 | ||
178a0557 | 2847 | exit_worker_thread: |
b8aa1682 | 2848 | ret = pthread_join(dispatcher_thread, &status); |
178a0557 MD |
2849 | if (ret) { |
2850 | errno = ret; | |
2851 | PERROR("pthread_join dispatcher_thread"); | |
2852 | retval = -1; | |
b8aa1682 | 2853 | } |
178a0557 | 2854 | exit_dispatcher_thread: |
42415026 | 2855 | |
65931c8b | 2856 | ret = pthread_join(health_thread, &status); |
178a0557 MD |
2857 | if (ret) { |
2858 | errno = ret; | |
2859 | PERROR("pthread_join health_thread"); | |
2860 | retval = -1; | |
65931c8b | 2861 | } |
178a0557 | 2862 | exit_health_thread: |
65931c8b | 2863 | |
65931c8b | 2864 | utils_close_pipe(health_quit_pipe); |
178a0557 | 2865 | exit_health_quit_pipe: |
65931c8b | 2866 | |
178a0557 | 2867 | exit_init_data: |
55706a7d | 2868 | health_app_destroy(health_relayd); |
55706a7d | 2869 | exit_health_app_create: |
178a0557 | 2870 | exit_options: |
7591bab1 MD |
2871 | relayd_cleanup(); |
2872 | ||
2873 | /* Ensure all prior call_rcu are done. */ | |
2874 | rcu_barrier(); | |
d3e2ba59 | 2875 | |
178a0557 | 2876 | if (!retval) { |
b8aa1682 | 2877 | exit(EXIT_SUCCESS); |
178a0557 MD |
2878 | } else { |
2879 | exit(EXIT_FAILURE); | |
b8aa1682 | 2880 | } |
b8aa1682 | 2881 | } |