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> |
44a2fbf1 JG |
58 | #include <common/dynamic-buffer.h> |
59 | #include <common/buffer-view.h> | |
7591bab1 | 60 | #include <urcu/rculist.h> |
b8aa1682 | 61 | |
8ff7624a | 62 | #include "version.h" |
0f907de1 | 63 | #include "cmd.h" |
d3e2ba59 | 64 | #include "ctf-trace.h" |
1c20f0e2 | 65 | #include "index.h" |
0f907de1 | 66 | #include "utils.h" |
b8aa1682 | 67 | #include "lttng-relayd.h" |
d3e2ba59 | 68 | #include "live.h" |
55706a7d | 69 | #include "health-relayd.h" |
9b5e0863 | 70 | #include "testpoint.h" |
2f8f53af | 71 | #include "viewer-stream.h" |
2a174661 DG |
72 | #include "session.h" |
73 | #include "stream.h" | |
58eb9381 | 74 | #include "connection.h" |
a44ca2ca | 75 | #include "tracefile-array.h" |
2fc6b1ab | 76 | #include "tcp_keep_alive.h" |
b8aa1682 | 77 | |
44a2fbf1 JG |
78 | enum relay_connection_status { |
79 | RELAY_CONNECTION_STATUS_OK, | |
80 | /* An error occured while processing an event on the connection. */ | |
81 | RELAY_CONNECTION_STATUS_ERROR, | |
82 | /* Connection closed/shutdown cleanly. */ | |
83 | RELAY_CONNECTION_STATUS_CLOSED, | |
84 | }; | |
85 | ||
b8aa1682 | 86 | /* command line options */ |
76375580 | 87 | char *opt_output_path, *opt_working_directory; |
8ff7624a | 88 | static int opt_daemon, opt_background, opt_print_version; |
b4d507ca JR |
89 | int opt_group_output_by_session; |
90 | int opt_group_output_by_host; | |
3fd27398 MD |
91 | |
92 | /* | |
93 | * We need to wait for listener and live listener threads, as well as | |
94 | * health check thread, before being ready to signal readiness. | |
95 | */ | |
96 | #define NR_LTTNG_RELAY_READY 3 | |
97 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
0848dba7 MD |
98 | |
99 | /* Size of receive buffer. */ | |
100 | #define RECV_DATA_BUFFER_SIZE 65536 | |
101 | ||
3fd27398 MD |
102 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ |
103 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
104 | ||
095a4ae5 MD |
105 | static struct lttng_uri *control_uri; |
106 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 107 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
108 | |
109 | const char *progname; | |
b8aa1682 | 110 | |
65931c8b | 111 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
112 | static int tracing_group_name_override; |
113 | ||
114 | const char * const config_section_name = "relayd"; | |
65931c8b | 115 | |
b8aa1682 JD |
116 | /* |
117 | * Quit pipe for all threads. This permits a single cancellation point | |
118 | * for all threads when receiving an event on the pipe. | |
119 | */ | |
0b242f62 | 120 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
121 | |
122 | /* | |
123 | * This pipe is used to inform the worker thread that a command is queued and | |
124 | * ready to be processed. | |
125 | */ | |
58eb9381 | 126 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 127 | |
26c9d55e | 128 | /* Shared between threads */ |
b8aa1682 JD |
129 | static int dispatch_thread_exit; |
130 | ||
131 | static pthread_t listener_thread; | |
132 | static pthread_t dispatcher_thread; | |
133 | static pthread_t worker_thread; | |
65931c8b | 134 | static pthread_t health_thread; |
b8aa1682 | 135 | |
7591bab1 MD |
136 | /* |
137 | * last_relay_stream_id_lock protects last_relay_stream_id increment | |
138 | * atomicity on 32-bit architectures. | |
139 | */ | |
140 | static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER; | |
095a4ae5 | 141 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
142 | |
143 | /* | |
144 | * Relay command queue. | |
145 | * | |
146 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
147 | * queue. | |
148 | */ | |
58eb9381 | 149 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 | 150 | |
d3e2ba59 JD |
151 | /* Global relay stream hash table. */ |
152 | struct lttng_ht *relay_streams_ht; | |
153 | ||
92c6ca54 DG |
154 | /* Global relay viewer stream hash table. */ |
155 | struct lttng_ht *viewer_streams_ht; | |
156 | ||
7591bab1 MD |
157 | /* Global relay sessions hash table. */ |
158 | struct lttng_ht *sessions_ht; | |
0a6518b0 | 159 | |
55706a7d | 160 | /* Relayd health monitoring */ |
eea7556c | 161 | struct health_app *health_relayd; |
55706a7d | 162 | |
cd60b05a JG |
163 | static struct option long_options[] = { |
164 | { "control-port", 1, 0, 'C', }, | |
165 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 166 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 167 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 168 | { "background", 0, 0, 'b', }, |
cd60b05a JG |
169 | { "group", 1, 0, 'g', }, |
170 | { "help", 0, 0, 'h', }, | |
171 | { "output", 1, 0, 'o', }, | |
172 | { "verbose", 0, 0, 'v', }, | |
173 | { "config", 1, 0, 'f' }, | |
297af7ff | 174 | { "version", 0, 0, 'V' }, |
76375580 | 175 | { "working-directory", 1, 0, 'w', }, |
b4d507ca JR |
176 | { "group-output-by-session", 0, 0, 's', }, |
177 | { "group-output-by-host", 0, 0, 'p', }, | |
cd60b05a JG |
178 | { NULL, 0, 0, 0, }, |
179 | }; | |
180 | ||
297af7ff | 181 | static const char *config_ignore_options[] = { "help", "config", "version" }; |
cd60b05a | 182 | |
8ff7624a JR |
183 | static void print_version(void) { |
184 | fprintf(stdout, "%s\n", VERSION); | |
185 | } | |
186 | ||
187 | static void relayd_config_log(void) | |
188 | { | |
189 | DBG("LTTng-relayd " VERSION " - " VERSION_NAME "%s%s", | |
190 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION, | |
191 | EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME); | |
192 | if (EXTRA_VERSION_DESCRIPTION[0] != '\0') { | |
193 | DBG("LTTng-relayd extra version description:\n\t" EXTRA_VERSION_DESCRIPTION "\n"); | |
194 | } | |
195 | } | |
196 | ||
cd60b05a JG |
197 | /* |
198 | * Take an option from the getopt output and set it in the right variable to be | |
199 | * used later. | |
200 | * | |
201 | * Return 0 on success else a negative value. | |
202 | */ | |
7591bab1 | 203 | static int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 204 | { |
cd60b05a JG |
205 | int ret; |
206 | ||
207 | switch (opt) { | |
208 | case 0: | |
209 | fprintf(stderr, "option %s", optname); | |
210 | if (arg) { | |
211 | fprintf(stderr, " with arg %s\n", arg); | |
212 | } | |
213 | break; | |
214 | case 'C': | |
e8fa9fb0 MD |
215 | if (lttng_is_setuid_setgid()) { |
216 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
217 | "-C, --control-port"); | |
218 | } else { | |
219 | ret = uri_parse(arg, &control_uri); | |
220 | if (ret < 0) { | |
221 | ERR("Invalid control URI specified"); | |
222 | goto end; | |
223 | } | |
224 | if (control_uri->port == 0) { | |
225 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
226 | } | |
cd60b05a JG |
227 | } |
228 | break; | |
229 | case 'D': | |
e8fa9fb0 MD |
230 | if (lttng_is_setuid_setgid()) { |
231 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
232 | "-D, -data-port"); | |
233 | } else { | |
234 | ret = uri_parse(arg, &data_uri); | |
235 | if (ret < 0) { | |
236 | ERR("Invalid data URI specified"); | |
237 | goto end; | |
238 | } | |
239 | if (data_uri->port == 0) { | |
240 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
241 | } | |
cd60b05a JG |
242 | } |
243 | break; | |
8d5c808e | 244 | case 'L': |
e8fa9fb0 MD |
245 | if (lttng_is_setuid_setgid()) { |
246 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
247 | "-L, -live-port"); | |
248 | } else { | |
249 | ret = uri_parse(arg, &live_uri); | |
250 | if (ret < 0) { | |
251 | ERR("Invalid live URI specified"); | |
252 | goto end; | |
253 | } | |
254 | if (live_uri->port == 0) { | |
255 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
256 | } | |
8d5c808e AM |
257 | } |
258 | break; | |
cd60b05a JG |
259 | case 'd': |
260 | opt_daemon = 1; | |
261 | break; | |
b5218ffb MD |
262 | case 'b': |
263 | opt_background = 1; | |
264 | break; | |
cd60b05a | 265 | case 'g': |
e8fa9fb0 MD |
266 | if (lttng_is_setuid_setgid()) { |
267 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
268 | "-g, --group"); | |
269 | } else { | |
270 | tracing_group_name = strdup(arg); | |
271 | if (tracing_group_name == NULL) { | |
272 | ret = -errno; | |
273 | PERROR("strdup"); | |
274 | goto end; | |
275 | } | |
276 | tracing_group_name_override = 1; | |
330a40bb | 277 | } |
cd60b05a JG |
278 | break; |
279 | case 'h': | |
655b5cc1 PP |
280 | ret = utils_show_man_page(8, "lttng-relayd"); |
281 | if (ret) { | |
282 | ERR("Cannot view man page lttng-relayd(8)"); | |
283 | perror("exec"); | |
284 | } | |
cd60b05a | 285 | exit(EXIT_FAILURE); |
297af7ff | 286 | case 'V': |
8ff7624a JR |
287 | opt_print_version = 1; |
288 | break; | |
cd60b05a | 289 | case 'o': |
e8fa9fb0 MD |
290 | if (lttng_is_setuid_setgid()) { |
291 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
292 | "-o, --output"); | |
293 | } else { | |
294 | ret = asprintf(&opt_output_path, "%s", arg); | |
295 | if (ret < 0) { | |
296 | ret = -errno; | |
297 | PERROR("asprintf opt_output_path"); | |
298 | goto end; | |
299 | } | |
cd60b05a JG |
300 | } |
301 | break; | |
76375580 JR |
302 | case 'w': |
303 | if (lttng_is_setuid_setgid()) { | |
304 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
305 | "-w, --working-directory"); | |
306 | } else { | |
307 | ret = asprintf(&opt_working_directory, "%s", arg); | |
308 | if (ret < 0) { | |
309 | ret = -errno; | |
310 | PERROR("asprintf working_directory"); | |
311 | goto end; | |
312 | } | |
313 | } | |
314 | break; | |
315 | ||
cd60b05a JG |
316 | case 'v': |
317 | /* Verbose level can increase using multiple -v */ | |
318 | if (arg) { | |
319 | lttng_opt_verbose = config_parse_value(arg); | |
320 | } else { | |
849e5b7b DG |
321 | /* Only 3 level of verbosity (-vvv). */ |
322 | if (lttng_opt_verbose < 3) { | |
323 | lttng_opt_verbose += 1; | |
324 | } | |
cd60b05a JG |
325 | } |
326 | break; | |
b4d507ca JR |
327 | case 's': |
328 | if (opt_group_output_by_host) { | |
329 | ERR("Cannot set --group-output-by-session, --group-output-by-host already defined"); | |
330 | exit(EXIT_FAILURE); | |
331 | } | |
332 | opt_group_output_by_session = 1; | |
333 | break; | |
334 | case 'p': | |
335 | if (opt_group_output_by_session) { | |
336 | ERR("Cannot set --group-output-by-host, --group-output-by-session already defined"); | |
337 | exit(EXIT_FAILURE); | |
338 | } | |
339 | opt_group_output_by_host = 1; | |
340 | break; | |
cd60b05a JG |
341 | default: |
342 | /* Unknown option or other error. | |
343 | * Error is printed by getopt, just return */ | |
344 | ret = -1; | |
345 | goto end; | |
346 | } | |
347 | ||
348 | /* All good. */ | |
349 | ret = 0; | |
350 | ||
351 | end: | |
352 | return ret; | |
353 | } | |
354 | ||
355 | /* | |
356 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 357 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
cd60b05a JG |
358 | * return value conventions. |
359 | */ | |
7591bab1 | 360 | static int config_entry_handler(const struct config_entry *entry, void *unused) |
cd60b05a JG |
361 | { |
362 | int ret = 0, i; | |
363 | ||
364 | if (!entry || !entry->name || !entry->value) { | |
365 | ret = -EINVAL; | |
366 | goto end; | |
367 | } | |
368 | ||
369 | /* Check if the option is to be ignored */ | |
370 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
371 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
372 | goto end; | |
373 | } | |
374 | } | |
375 | ||
376 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
377 | /* Ignore if entry name is not fully matched. */ | |
378 | if (strcmp(entry->name, long_options[i].name)) { | |
379 | continue; | |
380 | } | |
381 | ||
382 | /* | |
7591bab1 MD |
383 | * If the option takes no argument on the command line, |
384 | * we have to check if the value is "true". We support | |
385 | * non-zero numeric values, true, on and yes. | |
cd60b05a JG |
386 | */ |
387 | if (!long_options[i].has_arg) { | |
388 | ret = config_parse_value(entry->value); | |
389 | if (ret <= 0) { | |
390 | if (ret) { | |
391 | WARN("Invalid configuration value \"%s\" for option %s", | |
392 | entry->value, entry->name); | |
393 | } | |
394 | /* False, skip boolean config option. */ | |
395 | goto end; | |
396 | } | |
397 | } | |
398 | ||
399 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
400 | goto end; | |
401 | } | |
402 | ||
403 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
404 | entry->name); | |
405 | ||
406 | end: | |
407 | return ret; | |
408 | } | |
409 | ||
c7cc870e JR |
410 | static void parse_env_options(void) |
411 | { | |
412 | char *value = NULL; | |
413 | ||
414 | value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_WORKING_DIRECTORY_ENV); | |
415 | if (value) { | |
416 | opt_working_directory = value; | |
417 | } | |
418 | } | |
419 | ||
7591bab1 | 420 | static int set_options(int argc, char **argv) |
cd60b05a | 421 | { |
178a0557 | 422 | int c, ret = 0, option_index = 0, retval = 0; |
cd60b05a JG |
423 | int orig_optopt = optopt, orig_optind = optind; |
424 | char *default_address, *optstring; | |
425 | const char *config_path = NULL; | |
426 | ||
427 | optstring = utils_generate_optstring(long_options, | |
428 | sizeof(long_options) / sizeof(struct option)); | |
429 | if (!optstring) { | |
178a0557 | 430 | retval = -ENOMEM; |
cd60b05a JG |
431 | goto exit; |
432 | } | |
433 | ||
434 | /* Check for the --config option */ | |
435 | ||
436 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
437 | &option_index)) != -1) { | |
438 | if (c == '?') { | |
178a0557 | 439 | retval = -EINVAL; |
cd60b05a JG |
440 | goto exit; |
441 | } else if (c != 'f') { | |
442 | continue; | |
443 | } | |
444 | ||
e8fa9fb0 MD |
445 | if (lttng_is_setuid_setgid()) { |
446 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
447 | "-f, --config"); | |
448 | } else { | |
449 | config_path = utils_expand_path(optarg); | |
450 | if (!config_path) { | |
451 | ERR("Failed to resolve path: %s", optarg); | |
452 | } | |
cd60b05a JG |
453 | } |
454 | } | |
455 | ||
456 | ret = config_get_section_entries(config_path, config_section_name, | |
457 | config_entry_handler, NULL); | |
458 | if (ret) { | |
459 | if (ret > 0) { | |
460 | ERR("Invalid configuration option at line %i", ret); | |
cd60b05a | 461 | } |
178a0557 | 462 | retval = -1; |
cd60b05a JG |
463 | goto exit; |
464 | } | |
b8aa1682 | 465 | |
cd60b05a JG |
466 | /* Reset getopt's global state */ |
467 | optopt = orig_optopt; | |
468 | optind = orig_optind; | |
b8aa1682 | 469 | while (1) { |
cd60b05a | 470 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
471 | if (c == -1) { |
472 | break; | |
473 | } | |
474 | ||
cd60b05a JG |
475 | ret = set_option(c, optarg, long_options[option_index].name); |
476 | if (ret < 0) { | |
178a0557 | 477 | retval = -1; |
b8aa1682 JD |
478 | goto exit; |
479 | } | |
480 | } | |
481 | ||
482 | /* assign default values */ | |
483 | if (control_uri == NULL) { | |
fa91dc52 MD |
484 | ret = asprintf(&default_address, |
485 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
486 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
487 | if (ret < 0) { |
488 | PERROR("asprintf default data address"); | |
178a0557 | 489 | retval = -1; |
b8aa1682 JD |
490 | goto exit; |
491 | } | |
492 | ||
493 | ret = uri_parse(default_address, &control_uri); | |
494 | free(default_address); | |
495 | if (ret < 0) { | |
496 | ERR("Invalid control URI specified"); | |
178a0557 | 497 | retval = -1; |
b8aa1682 JD |
498 | goto exit; |
499 | } | |
500 | } | |
501 | if (data_uri == NULL) { | |
fa91dc52 MD |
502 | ret = asprintf(&default_address, |
503 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
504 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
505 | if (ret < 0) { |
506 | PERROR("asprintf default data address"); | |
178a0557 | 507 | retval = -1; |
b8aa1682 JD |
508 | goto exit; |
509 | } | |
510 | ||
511 | ret = uri_parse(default_address, &data_uri); | |
512 | free(default_address); | |
513 | if (ret < 0) { | |
514 | ERR("Invalid data URI specified"); | |
178a0557 | 515 | retval = -1; |
b8aa1682 JD |
516 | goto exit; |
517 | } | |
518 | } | |
d3e2ba59 | 519 | if (live_uri == NULL) { |
fa91dc52 MD |
520 | ret = asprintf(&default_address, |
521 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
522 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
523 | if (ret < 0) { |
524 | PERROR("asprintf default viewer control address"); | |
178a0557 | 525 | retval = -1; |
d3e2ba59 JD |
526 | goto exit; |
527 | } | |
528 | ||
529 | ret = uri_parse(default_address, &live_uri); | |
530 | free(default_address); | |
531 | if (ret < 0) { | |
532 | ERR("Invalid viewer control URI specified"); | |
178a0557 | 533 | retval = -1; |
d3e2ba59 JD |
534 | goto exit; |
535 | } | |
536 | } | |
b8aa1682 | 537 | |
b4d507ca JR |
538 | if (!opt_group_output_by_session && !opt_group_output_by_host) { |
539 | /* Group by host by default */ | |
540 | opt_group_output_by_host = 1; | |
541 | } | |
542 | ||
b8aa1682 | 543 | exit: |
cd60b05a | 544 | free(optstring); |
178a0557 | 545 | return retval; |
b8aa1682 JD |
546 | } |
547 | ||
7591bab1 MD |
548 | static void print_global_objects(void) |
549 | { | |
550 | rcu_register_thread(); | |
551 | ||
552 | print_viewer_streams(); | |
553 | print_relay_streams(); | |
554 | print_sessions(); | |
555 | ||
556 | rcu_unregister_thread(); | |
557 | } | |
558 | ||
b8aa1682 JD |
559 | /* |
560 | * Cleanup the daemon | |
561 | */ | |
7591bab1 | 562 | static void relayd_cleanup(void) |
b8aa1682 | 563 | { |
7591bab1 MD |
564 | print_global_objects(); |
565 | ||
b8aa1682 JD |
566 | DBG("Cleaning up"); |
567 | ||
178a0557 MD |
568 | if (viewer_streams_ht) |
569 | lttng_ht_destroy(viewer_streams_ht); | |
570 | if (relay_streams_ht) | |
571 | lttng_ht_destroy(relay_streams_ht); | |
7591bab1 MD |
572 | if (sessions_ht) |
573 | lttng_ht_destroy(sessions_ht); | |
178a0557 | 574 | |
095a4ae5 MD |
575 | /* free the dynamically allocated opt_output_path */ |
576 | free(opt_output_path); | |
577 | ||
a02de639 CB |
578 | /* Close thread quit pipes */ |
579 | utils_close_pipe(thread_quit_pipe); | |
580 | ||
710c1f73 DG |
581 | uri_free(control_uri); |
582 | uri_free(data_uri); | |
8d5c808e | 583 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
584 | |
585 | if (tracing_group_name_override) { | |
586 | free((void *) tracing_group_name); | |
587 | } | |
b8aa1682 JD |
588 | } |
589 | ||
590 | /* | |
591 | * Write to writable pipe used to notify a thread. | |
592 | */ | |
7591bab1 | 593 | static int notify_thread_pipe(int wpipe) |
b8aa1682 | 594 | { |
6cd525e8 | 595 | ssize_t ret; |
b8aa1682 | 596 | |
6cd525e8 MD |
597 | ret = lttng_write(wpipe, "!", 1); |
598 | if (ret < 1) { | |
b8aa1682 | 599 | PERROR("write poll pipe"); |
b4aacfdc | 600 | goto end; |
b8aa1682 | 601 | } |
b4aacfdc MD |
602 | ret = 0; |
603 | end: | |
b8aa1682 JD |
604 | return ret; |
605 | } | |
606 | ||
7591bab1 | 607 | static int notify_health_quit_pipe(int *pipe) |
65931c8b | 608 | { |
6cd525e8 | 609 | ssize_t ret; |
65931c8b | 610 | |
6cd525e8 MD |
611 | ret = lttng_write(pipe[1], "4", 1); |
612 | if (ret < 1) { | |
65931c8b | 613 | PERROR("write relay health quit"); |
b4aacfdc | 614 | goto end; |
65931c8b | 615 | } |
b4aacfdc MD |
616 | ret = 0; |
617 | end: | |
618 | return ret; | |
65931c8b MD |
619 | } |
620 | ||
b8aa1682 | 621 | /* |
b4aacfdc | 622 | * Stop all relayd and relayd-live threads. |
b8aa1682 | 623 | */ |
b4aacfdc | 624 | int lttng_relay_stop_threads(void) |
b8aa1682 | 625 | { |
b4aacfdc | 626 | int retval = 0; |
b8aa1682 JD |
627 | |
628 | /* Stopping all threads */ | |
629 | DBG("Terminating all threads"); | |
b4aacfdc | 630 | if (notify_thread_pipe(thread_quit_pipe[1])) { |
b8aa1682 | 631 | ERR("write error on thread quit pipe"); |
b4aacfdc | 632 | retval = -1; |
b8aa1682 JD |
633 | } |
634 | ||
b4aacfdc MD |
635 | if (notify_health_quit_pipe(health_quit_pipe)) { |
636 | ERR("write error on health quit pipe"); | |
637 | } | |
65931c8b | 638 | |
b8aa1682 | 639 | /* Dispatch thread */ |
26c9d55e | 640 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 641 | futex_nto1_wake(&relay_conn_queue.futex); |
178a0557 | 642 | |
b4aacfdc | 643 | if (relayd_live_stop()) { |
178a0557 | 644 | ERR("Error stopping live threads"); |
b4aacfdc | 645 | retval = -1; |
178a0557 | 646 | } |
b4aacfdc | 647 | return retval; |
b8aa1682 JD |
648 | } |
649 | ||
650 | /* | |
651 | * Signal handler for the daemon | |
652 | * | |
653 | * Simply stop all worker threads, leaving main() return gracefully after | |
654 | * joining all threads and calling cleanup(). | |
655 | */ | |
7591bab1 | 656 | static void sighandler(int sig) |
b8aa1682 JD |
657 | { |
658 | switch (sig) { | |
b8aa1682 JD |
659 | case SIGINT: |
660 | DBG("SIGINT caught"); | |
b4aacfdc MD |
661 | if (lttng_relay_stop_threads()) { |
662 | ERR("Error stopping threads"); | |
663 | } | |
b8aa1682 JD |
664 | break; |
665 | case SIGTERM: | |
666 | DBG("SIGTERM caught"); | |
b4aacfdc MD |
667 | if (lttng_relay_stop_threads()) { |
668 | ERR("Error stopping threads"); | |
669 | } | |
b8aa1682 | 670 | break; |
3fd27398 MD |
671 | case SIGUSR1: |
672 | CMM_STORE_SHARED(recv_child_signal, 1); | |
673 | break; | |
b8aa1682 JD |
674 | default: |
675 | break; | |
676 | } | |
677 | } | |
678 | ||
679 | /* | |
680 | * Setup signal handler for : | |
681 | * SIGINT, SIGTERM, SIGPIPE | |
682 | */ | |
7591bab1 | 683 | static int set_signal_handler(void) |
b8aa1682 JD |
684 | { |
685 | int ret = 0; | |
686 | struct sigaction sa; | |
687 | sigset_t sigset; | |
688 | ||
689 | if ((ret = sigemptyset(&sigset)) < 0) { | |
690 | PERROR("sigemptyset"); | |
691 | return ret; | |
692 | } | |
693 | ||
b8aa1682 JD |
694 | sa.sa_mask = sigset; |
695 | sa.sa_flags = 0; | |
0072e5e2 MD |
696 | |
697 | sa.sa_handler = sighandler; | |
b8aa1682 JD |
698 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
699 | PERROR("sigaction"); | |
700 | return ret; | |
701 | } | |
702 | ||
703 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
704 | PERROR("sigaction"); | |
705 | return ret; | |
706 | } | |
707 | ||
0072e5e2 | 708 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
b8aa1682 JD |
709 | PERROR("sigaction"); |
710 | return ret; | |
711 | } | |
712 | ||
0072e5e2 MD |
713 | sa.sa_handler = SIG_IGN; |
714 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
3fd27398 MD |
715 | PERROR("sigaction"); |
716 | return ret; | |
717 | } | |
718 | ||
719 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
720 | |
721 | return ret; | |
722 | } | |
723 | ||
3fd27398 MD |
724 | void lttng_relay_notify_ready(void) |
725 | { | |
726 | /* Notify the parent of the fork() process that we are ready. */ | |
727 | if (opt_daemon || opt_background) { | |
728 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
729 | kill(child_ppid, SIGUSR1); | |
730 | } | |
731 | } | |
732 | } | |
733 | ||
b8aa1682 JD |
734 | /* |
735 | * Init thread quit pipe. | |
736 | * | |
737 | * Return -1 on error or 0 if all pipes are created. | |
738 | */ | |
7591bab1 | 739 | static int init_thread_quit_pipe(void) |
b8aa1682 | 740 | { |
a02de639 | 741 | int ret; |
b8aa1682 | 742 | |
a02de639 | 743 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 744 | |
b8aa1682 JD |
745 | return ret; |
746 | } | |
747 | ||
748 | /* | |
749 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
750 | */ | |
7591bab1 | 751 | static int create_thread_poll_set(struct lttng_poll_event *events, int size) |
b8aa1682 JD |
752 | { |
753 | int ret; | |
754 | ||
755 | if (events == NULL || size == 0) { | |
756 | ret = -1; | |
757 | goto error; | |
758 | } | |
759 | ||
760 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
761 | if (ret < 0) { | |
762 | goto error; | |
763 | } | |
764 | ||
765 | /* Add quit pipe */ | |
c7759e6a | 766 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
767 | if (ret < 0) { |
768 | goto error; | |
769 | } | |
770 | ||
771 | return 0; | |
772 | ||
773 | error: | |
774 | return ret; | |
775 | } | |
776 | ||
777 | /* | |
778 | * Check if the thread quit pipe was triggered. | |
779 | * | |
780 | * Return 1 if it was triggered else 0; | |
781 | */ | |
7591bab1 | 782 | static int check_thread_quit_pipe(int fd, uint32_t events) |
b8aa1682 JD |
783 | { |
784 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
785 | return 1; | |
786 | } | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | /* | |
792 | * Create and init socket from uri. | |
793 | */ | |
7591bab1 | 794 | static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri) |
b8aa1682 JD |
795 | { |
796 | int ret; | |
797 | struct lttcomm_sock *sock = NULL; | |
798 | ||
799 | sock = lttcomm_alloc_sock_from_uri(uri); | |
800 | if (sock == NULL) { | |
801 | ERR("Allocating socket"); | |
802 | goto error; | |
803 | } | |
804 | ||
805 | ret = lttcomm_create_sock(sock); | |
806 | if (ret < 0) { | |
807 | goto error; | |
808 | } | |
809 | DBG("Listening on sock %d", sock->fd); | |
810 | ||
811 | ret = sock->ops->bind(sock); | |
812 | if (ret < 0) { | |
813 | goto error; | |
814 | } | |
815 | ||
816 | ret = sock->ops->listen(sock, -1); | |
817 | if (ret < 0) { | |
818 | goto error; | |
819 | ||
820 | } | |
821 | ||
822 | return sock; | |
823 | ||
824 | error: | |
825 | if (sock) { | |
826 | lttcomm_destroy_sock(sock); | |
827 | } | |
828 | return NULL; | |
829 | } | |
830 | ||
831 | /* | |
832 | * This thread manages the listening for new connections on the network | |
833 | */ | |
7591bab1 | 834 | static void *relay_thread_listener(void *data) |
b8aa1682 | 835 | { |
095a4ae5 | 836 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
837 | uint32_t revents, nb_fd; |
838 | struct lttng_poll_event events; | |
839 | struct lttcomm_sock *control_sock, *data_sock; | |
840 | ||
b8aa1682 JD |
841 | DBG("[thread] Relay listener started"); |
842 | ||
55706a7d MD |
843 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
844 | ||
f385ae0a MD |
845 | health_code_update(); |
846 | ||
7591bab1 | 847 | control_sock = relay_socket_create(control_uri); |
b8aa1682 | 848 | if (!control_sock) { |
095a4ae5 | 849 | goto error_sock_control; |
b8aa1682 JD |
850 | } |
851 | ||
7591bab1 | 852 | data_sock = relay_socket_create(data_uri); |
b8aa1682 | 853 | if (!data_sock) { |
095a4ae5 | 854 | goto error_sock_relay; |
b8aa1682 JD |
855 | } |
856 | ||
857 | /* | |
7591bab1 MD |
858 | * Pass 3 as size here for the thread quit pipe, control and |
859 | * data socket. | |
b8aa1682 JD |
860 | */ |
861 | ret = create_thread_poll_set(&events, 3); | |
862 | if (ret < 0) { | |
863 | goto error_create_poll; | |
864 | } | |
865 | ||
866 | /* Add the control socket */ | |
867 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
868 | if (ret < 0) { | |
869 | goto error_poll_add; | |
870 | } | |
871 | ||
872 | /* Add the data socket */ | |
873 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
874 | if (ret < 0) { | |
875 | goto error_poll_add; | |
876 | } | |
877 | ||
3fd27398 MD |
878 | lttng_relay_notify_ready(); |
879 | ||
9b5e0863 MD |
880 | if (testpoint(relayd_thread_listener)) { |
881 | goto error_testpoint; | |
882 | } | |
883 | ||
b8aa1682 | 884 | while (1) { |
f385ae0a MD |
885 | health_code_update(); |
886 | ||
b8aa1682 JD |
887 | DBG("Listener accepting connections"); |
888 | ||
b8aa1682 | 889 | restart: |
f385ae0a | 890 | health_poll_entry(); |
b8aa1682 | 891 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 892 | health_poll_exit(); |
b8aa1682 JD |
893 | if (ret < 0) { |
894 | /* | |
895 | * Restart interrupted system call. | |
896 | */ | |
897 | if (errno == EINTR) { | |
898 | goto restart; | |
899 | } | |
900 | goto error; | |
901 | } | |
902 | ||
0d9c5d77 DG |
903 | nb_fd = ret; |
904 | ||
b8aa1682 JD |
905 | DBG("Relay new connection received"); |
906 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
907 | health_code_update(); |
908 | ||
b8aa1682 JD |
909 | /* Fetch once the poll data */ |
910 | revents = LTTNG_POLL_GETEV(&events, i); | |
911 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
912 | ||
fd20dac9 | 913 | if (!revents) { |
7591bab1 MD |
914 | /* |
915 | * No activity for this FD (poll | |
916 | * implementation). | |
917 | */ | |
fd20dac9 MD |
918 | continue; |
919 | } | |
920 | ||
b8aa1682 JD |
921 | /* Thread quit pipe has been closed. Killing thread. */ |
922 | ret = check_thread_quit_pipe(pollfd, revents); | |
923 | if (ret) { | |
095a4ae5 MD |
924 | err = 0; |
925 | goto exit; | |
b8aa1682 JD |
926 | } |
927 | ||
03e43155 | 928 | if (revents & LPOLLIN) { |
4b7f17b2 | 929 | /* |
7591bab1 MD |
930 | * A new connection is requested, therefore a |
931 | * sessiond/consumerd connection is allocated in | |
932 | * this thread, enqueued to a global queue and | |
933 | * dequeued (and freed) in the worker thread. | |
4b7f17b2 | 934 | */ |
58eb9381 DG |
935 | int val = 1; |
936 | struct relay_connection *new_conn; | |
4b7f17b2 | 937 | struct lttcomm_sock *newsock; |
7591bab1 | 938 | enum connection_type type; |
b8aa1682 JD |
939 | |
940 | if (pollfd == data_sock->fd) { | |
7591bab1 | 941 | type = RELAY_DATA; |
b8aa1682 | 942 | newsock = data_sock->ops->accept(data_sock); |
58eb9381 DG |
943 | DBG("Relay data connection accepted, socket %d", |
944 | newsock->fd); | |
4b7f17b2 MD |
945 | } else { |
946 | assert(pollfd == control_sock->fd); | |
7591bab1 | 947 | type = RELAY_CONTROL; |
b8aa1682 | 948 | newsock = control_sock->ops->accept(control_sock); |
58eb9381 DG |
949 | DBG("Relay control connection accepted, socket %d", |
950 | newsock->fd); | |
b8aa1682 | 951 | } |
58eb9381 DG |
952 | if (!newsock) { |
953 | PERROR("accepting sock"); | |
58eb9381 DG |
954 | goto error; |
955 | } | |
956 | ||
957 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
958 | sizeof(val)); | |
b8aa1682 JD |
959 | if (ret < 0) { |
960 | PERROR("setsockopt inet"); | |
4b7f17b2 | 961 | lttcomm_destroy_sock(newsock); |
b8aa1682 JD |
962 | goto error; |
963 | } | |
2fc6b1ab JR |
964 | |
965 | ret = socket_apply_keep_alive_config(newsock->fd); | |
966 | if (ret < 0) { | |
967 | ERR("Failed to apply TCP keep-alive configuration on socket (%i)", | |
968 | newsock->fd); | |
969 | lttcomm_destroy_sock(newsock); | |
970 | goto error; | |
971 | } | |
972 | ||
7591bab1 MD |
973 | new_conn = connection_create(newsock, type); |
974 | if (!new_conn) { | |
975 | lttcomm_destroy_sock(newsock); | |
976 | goto error; | |
977 | } | |
58eb9381 DG |
978 | |
979 | /* Enqueue request for the dispatcher thread. */ | |
8bdee6e2 SM |
980 | cds_wfcq_enqueue(&relay_conn_queue.head, &relay_conn_queue.tail, |
981 | &new_conn->qnode); | |
b8aa1682 JD |
982 | |
983 | /* | |
7591bab1 MD |
984 | * Wake the dispatch queue futex. |
985 | * Implicit memory barrier with the | |
986 | * exchange in cds_wfcq_enqueue. | |
b8aa1682 | 987 | */ |
58eb9381 | 988 | futex_nto1_wake(&relay_conn_queue.futex); |
03e43155 MD |
989 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
990 | ERR("socket poll error"); | |
991 | goto error; | |
992 | } else { | |
993 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
994 | goto error; | |
b8aa1682 JD |
995 | } |
996 | } | |
997 | } | |
998 | ||
095a4ae5 | 999 | exit: |
b8aa1682 JD |
1000 | error: |
1001 | error_poll_add: | |
9b5e0863 | 1002 | error_testpoint: |
b8aa1682 JD |
1003 | lttng_poll_clean(&events); |
1004 | error_create_poll: | |
095a4ae5 MD |
1005 | if (data_sock->fd >= 0) { |
1006 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
1007 | if (ret) { |
1008 | PERROR("close"); | |
1009 | } | |
b8aa1682 | 1010 | } |
095a4ae5 MD |
1011 | lttcomm_destroy_sock(data_sock); |
1012 | error_sock_relay: | |
1013 | if (control_sock->fd >= 0) { | |
1014 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
1015 | if (ret) { |
1016 | PERROR("close"); | |
1017 | } | |
b8aa1682 | 1018 | } |
095a4ae5 MD |
1019 | lttcomm_destroy_sock(control_sock); |
1020 | error_sock_control: | |
1021 | if (err) { | |
f385ae0a MD |
1022 | health_error(); |
1023 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 1024 | } |
55706a7d | 1025 | health_unregister(health_relayd); |
b8aa1682 | 1026 | DBG("Relay listener thread cleanup complete"); |
b4aacfdc | 1027 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1028 | return NULL; |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | * This thread manages the dispatching of the requests to worker threads | |
1033 | */ | |
7591bab1 | 1034 | static void *relay_thread_dispatcher(void *data) |
b8aa1682 | 1035 | { |
6cd525e8 MD |
1036 | int err = -1; |
1037 | ssize_t ret; | |
8bdee6e2 | 1038 | struct cds_wfcq_node *node; |
58eb9381 | 1039 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
1040 | |
1041 | DBG("[thread] Relay dispatcher started"); | |
1042 | ||
55706a7d MD |
1043 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
1044 | ||
9b5e0863 MD |
1045 | if (testpoint(relayd_thread_dispatcher)) { |
1046 | goto error_testpoint; | |
1047 | } | |
1048 | ||
f385ae0a MD |
1049 | health_code_update(); |
1050 | ||
68924dc1 | 1051 | for (;;) { |
f385ae0a MD |
1052 | health_code_update(); |
1053 | ||
b8aa1682 | 1054 | /* Atomically prepare the queue futex */ |
58eb9381 | 1055 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 | 1056 | |
68924dc1 MD |
1057 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1058 | break; | |
1059 | } | |
1060 | ||
b8aa1682 | 1061 | do { |
f385ae0a MD |
1062 | health_code_update(); |
1063 | ||
b8aa1682 | 1064 | /* Dequeue commands */ |
8bdee6e2 SM |
1065 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
1066 | &relay_conn_queue.tail); | |
b8aa1682 JD |
1067 | if (node == NULL) { |
1068 | DBG("Woken up but nothing in the relay command queue"); | |
1069 | /* Continue thread execution */ | |
1070 | break; | |
1071 | } | |
58eb9381 | 1072 | new_conn = caa_container_of(node, struct relay_connection, qnode); |
b8aa1682 | 1073 | |
58eb9381 | 1074 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
1075 | |
1076 | /* | |
7591bab1 MD |
1077 | * Inform worker thread of the new request. This |
1078 | * call is blocking so we can be assured that | |
1079 | * the data will be read at some point in time | |
1080 | * or wait to the end of the world :) | |
b8aa1682 | 1081 | */ |
58eb9381 DG |
1082 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
1083 | if (ret < 0) { | |
1084 | PERROR("write connection pipe"); | |
7591bab1 | 1085 | connection_put(new_conn); |
b8aa1682 JD |
1086 | goto error; |
1087 | } | |
1088 | } while (node != NULL); | |
1089 | ||
1090 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 1091 | health_poll_entry(); |
58eb9381 | 1092 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 1093 | health_poll_exit(); |
b8aa1682 JD |
1094 | } |
1095 | ||
f385ae0a MD |
1096 | /* Normal exit, no error */ |
1097 | err = 0; | |
1098 | ||
b8aa1682 | 1099 | error: |
9b5e0863 | 1100 | error_testpoint: |
f385ae0a MD |
1101 | if (err) { |
1102 | health_error(); | |
1103 | ERR("Health error occurred in %s", __func__); | |
1104 | } | |
55706a7d | 1105 | health_unregister(health_relayd); |
b8aa1682 | 1106 | DBG("Dispatch thread dying"); |
b4aacfdc | 1107 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1108 | return NULL; |
1109 | } | |
1110 | ||
b8aa1682 | 1111 | /* |
7591bab1 | 1112 | * Set index data from the control port to a given index object. |
b8aa1682 | 1113 | */ |
7591bab1 | 1114 | static int set_index_control_data(struct relay_index *index, |
234cd636 JD |
1115 | struct lttcomm_relayd_index *data, |
1116 | struct relay_connection *conn) | |
1c20f0e2 | 1117 | { |
7591bab1 | 1118 | struct ctf_packet_index index_data; |
1c20f0e2 JD |
1119 | |
1120 | /* | |
44a2fbf1 | 1121 | * The index on disk is encoded in big endian. |
1c20f0e2 | 1122 | */ |
44a2fbf1 JG |
1123 | index_data.packet_size = htobe64(data->packet_size); |
1124 | index_data.content_size = htobe64(data->content_size); | |
1125 | index_data.timestamp_begin = htobe64(data->timestamp_begin); | |
1126 | index_data.timestamp_end = htobe64(data->timestamp_end); | |
1127 | index_data.events_discarded = htobe64(data->events_discarded); | |
1128 | index_data.stream_id = htobe64(data->stream_id); | |
234cd636 JD |
1129 | |
1130 | if (conn->minor >= 8) { | |
44a2fbf1 JG |
1131 | index->index_data.stream_instance_id = htobe64(data->stream_instance_id); |
1132 | index->index_data.packet_seq_num = htobe64(data->packet_seq_num); | |
234cd636 JD |
1133 | } |
1134 | ||
7591bab1 | 1135 | return relay_index_set_data(index, &index_data); |
1c20f0e2 JD |
1136 | } |
1137 | ||
c5b6f4f0 DG |
1138 | /* |
1139 | * Handle the RELAYD_CREATE_SESSION command. | |
1140 | * | |
1141 | * On success, send back the session id or else return a negative value. | |
1142 | */ | |
44a2fbf1 JG |
1143 | static int relay_create_session(const struct lttcomm_relayd_hdr *recv_hdr, |
1144 | struct relay_connection *conn, | |
1145 | const struct lttng_buffer_view *payload) | |
c5b6f4f0 | 1146 | { |
44a2fbf1 JG |
1147 | int ret = 0; |
1148 | ssize_t send_ret; | |
c5b6f4f0 DG |
1149 | struct relay_session *session; |
1150 | struct lttcomm_relayd_status_session reply; | |
36d2e35d | 1151 | char session_name[LTTNG_NAME_MAX]; |
9cf3eb20 | 1152 | char hostname[LTTNG_HOST_NAME_MAX]; |
7591bab1 MD |
1153 | uint32_t live_timer = 0; |
1154 | bool snapshot = false; | |
c5b6f4f0 | 1155 | |
36d2e35d | 1156 | memset(session_name, 0, LTTNG_NAME_MAX); |
9cf3eb20 | 1157 | memset(hostname, 0, LTTNG_HOST_NAME_MAX); |
c5b6f4f0 DG |
1158 | |
1159 | memset(&reply, 0, sizeof(reply)); | |
1160 | ||
58eb9381 | 1161 | switch (conn->minor) { |
2a174661 DG |
1162 | case 1: |
1163 | case 2: | |
1164 | case 3: | |
1165 | break; | |
1166 | case 4: /* LTTng sessiond 2.4 */ | |
1167 | default: | |
44a2fbf1 | 1168 | ret = cmd_create_session_2_4(payload, session_name, |
7591bab1 MD |
1169 | hostname, &live_timer, &snapshot); |
1170 | } | |
1171 | if (ret < 0) { | |
1172 | goto send_reply; | |
d3e2ba59 JD |
1173 | } |
1174 | ||
7591bab1 MD |
1175 | session = session_create(session_name, hostname, live_timer, |
1176 | snapshot, conn->major, conn->minor); | |
1177 | if (!session) { | |
1178 | ret = -1; | |
1179 | goto send_reply; | |
1180 | } | |
1181 | assert(!conn->session); | |
1182 | conn->session = session; | |
c5b6f4f0 DG |
1183 | DBG("Created session %" PRIu64, session->id); |
1184 | ||
7591bab1 MD |
1185 | reply.session_id = htobe64(session->id); |
1186 | ||
1187 | send_reply: | |
c5b6f4f0 DG |
1188 | if (ret < 0) { |
1189 | reply.ret_code = htobe32(LTTNG_ERR_FATAL); | |
1190 | } else { | |
1191 | reply.ret_code = htobe32(LTTNG_OK); | |
1192 | } | |
1193 | ||
58eb9381 | 1194 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
44a2fbf1 JG |
1195 | if (send_ret < (ssize_t) sizeof(reply)) { |
1196 | ERR("Failed to send \"create session\" command reply (ret = %zd)", | |
1197 | send_ret); | |
1198 | ret = -1; | |
c5b6f4f0 DG |
1199 | } |
1200 | ||
1201 | return ret; | |
1202 | } | |
1203 | ||
a4baae1b JD |
1204 | /* |
1205 | * When we have received all the streams and the metadata for a channel, | |
1206 | * we make them visible to the viewer threads. | |
1207 | */ | |
7591bab1 | 1208 | static void publish_connection_local_streams(struct relay_connection *conn) |
a4baae1b | 1209 | { |
7591bab1 MD |
1210 | struct relay_stream *stream; |
1211 | struct relay_session *session = conn->session; | |
a4baae1b | 1212 | |
7591bab1 MD |
1213 | /* |
1214 | * We publish all streams belonging to a session atomically wrt | |
1215 | * session lock. | |
1216 | */ | |
1217 | pthread_mutex_lock(&session->lock); | |
1218 | rcu_read_lock(); | |
1219 | cds_list_for_each_entry_rcu(stream, &session->recv_list, | |
1220 | recv_node) { | |
1221 | stream_publish(stream); | |
a4baae1b | 1222 | } |
7591bab1 | 1223 | rcu_read_unlock(); |
a4baae1b | 1224 | |
7591bab1 MD |
1225 | /* |
1226 | * Inform the viewer that there are new streams in the session. | |
1227 | */ | |
1228 | if (session->viewer_attached) { | |
1229 | uatomic_set(&session->new_streams, 1); | |
1230 | } | |
1231 | pthread_mutex_unlock(&session->lock); | |
a4baae1b JD |
1232 | } |
1233 | ||
b8aa1682 JD |
1234 | /* |
1235 | * relay_add_stream: allocate a new stream for a session | |
1236 | */ | |
44a2fbf1 JG |
1237 | static int relay_add_stream(const struct lttcomm_relayd_hdr *recv_hdr, |
1238 | struct relay_connection *conn, | |
1239 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1240 | { |
7591bab1 MD |
1241 | int ret; |
1242 | ssize_t send_ret; | |
58eb9381 | 1243 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1244 | struct relay_stream *stream = NULL; |
1245 | struct lttcomm_relayd_status_stream reply; | |
4030a636 | 1246 | struct ctf_trace *trace = NULL; |
7591bab1 MD |
1247 | uint64_t stream_handle = -1ULL; |
1248 | char *path_name = NULL, *channel_name = NULL; | |
1249 | uint64_t tracefile_size = 0, tracefile_count = 0; | |
b8aa1682 | 1250 | |
44a2fbf1 | 1251 | if (!session || !conn->version_check_done) { |
b8aa1682 JD |
1252 | ERR("Trying to add a stream before version check"); |
1253 | ret = -1; | |
1254 | goto end_no_session; | |
1255 | } | |
1256 | ||
7591bab1 MD |
1257 | switch (session->minor) { |
1258 | case 1: /* LTTng sessiond 2.1. Allocates path_name and channel_name. */ | |
44a2fbf1 | 1259 | ret = cmd_recv_stream_2_1(payload, &path_name, |
b4d507ca | 1260 | &channel_name, session); |
0f907de1 | 1261 | break; |
7591bab1 | 1262 | case 2: /* LTTng sessiond 2.2. Allocates path_name and channel_name. */ |
0f907de1 | 1263 | default: |
44a2fbf1 | 1264 | ret = cmd_recv_stream_2_2(payload, &path_name, |
b4d507ca JR |
1265 | &channel_name, &tracefile_size, &tracefile_count, |
1266 | session); | |
0f907de1 JD |
1267 | break; |
1268 | } | |
1269 | if (ret < 0) { | |
7591bab1 | 1270 | goto send_reply; |
b8aa1682 JD |
1271 | } |
1272 | ||
7591bab1 | 1273 | trace = ctf_trace_get_by_path_or_create(session, path_name); |
2a174661 | 1274 | if (!trace) { |
7591bab1 | 1275 | goto send_reply; |
2a174661 | 1276 | } |
7591bab1 | 1277 | /* This stream here has one reference on the trace. */ |
2a174661 | 1278 | |
7591bab1 MD |
1279 | pthread_mutex_lock(&last_relay_stream_id_lock); |
1280 | stream_handle = ++last_relay_stream_id; | |
1281 | pthread_mutex_unlock(&last_relay_stream_id_lock); | |
d3e2ba59 | 1282 | |
7591bab1 MD |
1283 | /* We pass ownership of path_name and channel_name. */ |
1284 | stream = stream_create(trace, stream_handle, path_name, | |
1285 | channel_name, tracefile_size, tracefile_count); | |
1286 | path_name = NULL; | |
1287 | channel_name = NULL; | |
a4baae1b | 1288 | |
2a174661 | 1289 | /* |
7591bab1 MD |
1290 | * Streams are the owners of their trace. Reference to trace is |
1291 | * kept within stream_create(). | |
2a174661 | 1292 | */ |
7591bab1 | 1293 | ctf_trace_put(trace); |
d3e2ba59 | 1294 | |
7591bab1 | 1295 | send_reply: |
53efb85a | 1296 | memset(&reply, 0, sizeof(reply)); |
7591bab1 MD |
1297 | reply.handle = htobe64(stream_handle); |
1298 | if (!stream) { | |
f73fabfd | 1299 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 1300 | } else { |
f73fabfd | 1301 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1302 | } |
5af40280 | 1303 | |
58eb9381 | 1304 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 | 1305 | sizeof(struct lttcomm_relayd_status_stream), 0); |
44a2fbf1 JG |
1306 | if (send_ret < (ssize_t) sizeof(reply)) { |
1307 | ERR("Failed to send \"add stream\" command reply (ret = %zd)", | |
1308 | send_ret); | |
1309 | ret = -1; | |
b8aa1682 JD |
1310 | } |
1311 | ||
1312 | end_no_session: | |
7591bab1 MD |
1313 | free(path_name); |
1314 | free(channel_name); | |
0f907de1 | 1315 | return ret; |
b8aa1682 JD |
1316 | } |
1317 | ||
173af62f DG |
1318 | /* |
1319 | * relay_close_stream: close a specific stream | |
1320 | */ | |
44a2fbf1 JG |
1321 | static int relay_close_stream(const struct lttcomm_relayd_hdr *recv_hdr, |
1322 | struct relay_connection *conn, | |
1323 | const struct lttng_buffer_view *payload) | |
173af62f | 1324 | { |
44a2fbf1 JG |
1325 | int ret; |
1326 | ssize_t send_ret; | |
58eb9381 | 1327 | struct relay_session *session = conn->session; |
173af62f DG |
1328 | struct lttcomm_relayd_close_stream stream_info; |
1329 | struct lttcomm_relayd_generic_reply reply; | |
1330 | struct relay_stream *stream; | |
173af62f DG |
1331 | |
1332 | DBG("Close stream received"); | |
1333 | ||
44a2fbf1 | 1334 | if (!session || !conn->version_check_done) { |
173af62f DG |
1335 | ERR("Trying to close a stream before version check"); |
1336 | ret = -1; | |
1337 | goto end_no_session; | |
1338 | } | |
1339 | ||
44a2fbf1 JG |
1340 | if (payload->size < sizeof(stream_info)) { |
1341 | ERR("Unexpected payload size in \"relay_close_stream\": expected >= %zu bytes, got %zu bytes", | |
1342 | sizeof(stream_info), payload->size); | |
173af62f DG |
1343 | ret = -1; |
1344 | goto end_no_session; | |
1345 | } | |
44a2fbf1 JG |
1346 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1347 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1348 | stream_info.last_net_seq_num = be64toh(stream_info.last_net_seq_num); | |
173af62f | 1349 | |
44a2fbf1 | 1350 | stream = stream_get_by_id(stream_info.stream_id); |
173af62f DG |
1351 | if (!stream) { |
1352 | ret = -1; | |
7591bab1 | 1353 | goto end; |
173af62f | 1354 | } |
77f7bd85 MD |
1355 | |
1356 | /* | |
1357 | * Set last_net_seq_num before the close flag. Required by data | |
1358 | * pending check. | |
1359 | */ | |
7591bab1 | 1360 | pthread_mutex_lock(&stream->lock); |
44a2fbf1 | 1361 | stream->last_net_seq_num = stream_info.last_net_seq_num; |
77f7bd85 MD |
1362 | pthread_mutex_unlock(&stream->lock); |
1363 | ||
bda7c7b9 JG |
1364 | /* |
1365 | * This is one of the conditions which may trigger a stream close | |
1366 | * with the others being: | |
1367 | * 1) A close command is received for a stream | |
1368 | * 2) The control connection owning the stream is closed | |
1369 | * 3) We have received all of the stream's data _after_ a close | |
1370 | * request. | |
1371 | */ | |
1372 | try_stream_close(stream); | |
7591bab1 MD |
1373 | if (stream->is_metadata) { |
1374 | struct relay_viewer_stream *vstream; | |
173af62f | 1375 | |
7591bab1 MD |
1376 | vstream = viewer_stream_get_by_id(stream->stream_handle); |
1377 | if (vstream) { | |
1378 | if (vstream->metadata_sent == stream->metadata_received) { | |
1379 | /* | |
1380 | * Since all the metadata has been sent to the | |
1381 | * viewer and that we have a request to close | |
1382 | * its stream, we can safely teardown the | |
1383 | * corresponding metadata viewer stream. | |
1384 | */ | |
1385 | viewer_stream_put(vstream); | |
1386 | } | |
1387 | /* Put local reference. */ | |
1388 | viewer_stream_put(vstream); | |
1389 | } | |
1390 | } | |
7591bab1 | 1391 | stream_put(stream); |
44a2fbf1 | 1392 | ret = 0; |
173af62f | 1393 | |
7591bab1 | 1394 | end: |
53efb85a | 1395 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1396 | if (ret < 0) { |
f73fabfd | 1397 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1398 | } else { |
f73fabfd | 1399 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1400 | } |
58eb9381 | 1401 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f | 1402 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
44a2fbf1 JG |
1403 | if (send_ret < (ssize_t) sizeof(reply)) { |
1404 | ERR("Failed to send \"close stream\" command reply (ret = %zd)", | |
1405 | send_ret); | |
1406 | ret = -1; | |
173af62f DG |
1407 | } |
1408 | ||
1409 | end_no_session: | |
1410 | return ret; | |
1411 | } | |
1412 | ||
93ec662e JD |
1413 | /* |
1414 | * relay_reset_metadata: reset a metadata stream | |
1415 | */ | |
1416 | static | |
44a2fbf1 JG |
1417 | int relay_reset_metadata(const struct lttcomm_relayd_hdr *recv_hdr, |
1418 | struct relay_connection *conn, | |
1419 | const struct lttng_buffer_view *payload) | |
93ec662e | 1420 | { |
44a2fbf1 JG |
1421 | int ret; |
1422 | ssize_t send_ret; | |
93ec662e JD |
1423 | struct relay_session *session = conn->session; |
1424 | struct lttcomm_relayd_reset_metadata stream_info; | |
1425 | struct lttcomm_relayd_generic_reply reply; | |
1426 | struct relay_stream *stream; | |
1427 | ||
1428 | DBG("Reset metadata received"); | |
1429 | ||
44a2fbf1 | 1430 | if (!session || !conn->version_check_done) { |
93ec662e JD |
1431 | ERR("Trying to reset a metadata stream before version check"); |
1432 | ret = -1; | |
1433 | goto end_no_session; | |
1434 | } | |
1435 | ||
44a2fbf1 JG |
1436 | if (payload->size < sizeof(stream_info)) { |
1437 | ERR("Unexpected payload size in \"relay_reset_metadata\": expected >= %zu bytes, got %zu bytes", | |
1438 | sizeof(stream_info), payload->size); | |
93ec662e JD |
1439 | ret = -1; |
1440 | goto end_no_session; | |
1441 | } | |
44a2fbf1 JG |
1442 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1443 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1444 | stream_info.version = be64toh(stream_info.version); | |
1445 | ||
1446 | DBG("Update metadata to version %" PRIu64, stream_info.version); | |
93ec662e JD |
1447 | |
1448 | /* Unsupported for live sessions for now. */ | |
1449 | if (session->live_timer != 0) { | |
1450 | ret = -1; | |
1451 | goto end; | |
1452 | } | |
1453 | ||
44a2fbf1 | 1454 | stream = stream_get_by_id(stream_info.stream_id); |
93ec662e JD |
1455 | if (!stream) { |
1456 | ret = -1; | |
1457 | goto end; | |
1458 | } | |
1459 | pthread_mutex_lock(&stream->lock); | |
1460 | if (!stream->is_metadata) { | |
1461 | ret = -1; | |
1462 | goto end_unlock; | |
1463 | } | |
1464 | ||
1465 | ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, | |
1466 | 0, 0, -1, -1, stream->stream_fd->fd, NULL, | |
1467 | &stream->stream_fd->fd); | |
1468 | if (ret < 0) { | |
1469 | ERR("Failed to rotate metadata file %s of channel %s", | |
1470 | stream->path_name, stream->channel_name); | |
1471 | goto end_unlock; | |
1472 | } | |
1473 | ||
1474 | end_unlock: | |
1475 | pthread_mutex_unlock(&stream->lock); | |
1476 | stream_put(stream); | |
1477 | ||
1478 | end: | |
1479 | memset(&reply, 0, sizeof(reply)); | |
1480 | if (ret < 0) { | |
1481 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1482 | } else { | |
1483 | reply.ret_code = htobe32(LTTNG_OK); | |
1484 | } | |
1485 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1486 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
44a2fbf1 JG |
1487 | if (send_ret < (ssize_t) sizeof(reply)) { |
1488 | ERR("Failed to send \"reset metadata\" command reply (ret = %zd)", | |
1489 | send_ret); | |
1490 | ret = -1; | |
93ec662e JD |
1491 | } |
1492 | ||
1493 | end_no_session: | |
1494 | return ret; | |
1495 | } | |
1496 | ||
b8aa1682 JD |
1497 | /* |
1498 | * relay_unknown_command: send -1 if received unknown command | |
1499 | */ | |
7591bab1 | 1500 | static void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1501 | { |
1502 | struct lttcomm_relayd_generic_reply reply; | |
44a2fbf1 | 1503 | ssize_t send_ret; |
b8aa1682 | 1504 | |
53efb85a | 1505 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1506 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
44a2fbf1 JG |
1507 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1508 | if (send_ret < sizeof(reply)) { | |
1509 | ERR("Failed to send \"unknown command\" command reply (ret = %zd)", send_ret); | |
b8aa1682 JD |
1510 | } |
1511 | } | |
1512 | ||
1513 | /* | |
1514 | * relay_start: send an acknowledgment to the client to tell if we are | |
1515 | * ready to receive data. We are ready if a session is established. | |
1516 | */ | |
44a2fbf1 JG |
1517 | static int relay_start(const struct lttcomm_relayd_hdr *recv_hdr, |
1518 | struct relay_connection *conn, | |
1519 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1520 | { |
44a2fbf1 JG |
1521 | int ret = 0; |
1522 | ssize_t send_ret; | |
b8aa1682 | 1523 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1524 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1525 | |
1526 | if (!session) { | |
1527 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1528 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1529 | } |
1530 | ||
53efb85a | 1531 | memset(&reply, 0, sizeof(reply)); |
44a2fbf1 JG |
1532 | reply.ret_code = htobe32(LTTNG_OK); |
1533 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1534 | sizeof(reply), 0); | |
1535 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1536 | ERR("Failed to send \"relay_start\" command reply (ret = %zd)", | |
1537 | send_ret); | |
1538 | ret = -1; | |
b8aa1682 JD |
1539 | } |
1540 | ||
1541 | return ret; | |
1542 | } | |
1543 | ||
1d4dfdef DG |
1544 | /* |
1545 | * Append padding to the file pointed by the file descriptor fd. | |
1546 | */ | |
1547 | static int write_padding_to_file(int fd, uint32_t size) | |
1548 | { | |
6cd525e8 | 1549 | ssize_t ret = 0; |
1d4dfdef DG |
1550 | char *zeros; |
1551 | ||
1552 | if (size == 0) { | |
1553 | goto end; | |
1554 | } | |
1555 | ||
1556 | zeros = zmalloc(size); | |
1557 | if (zeros == NULL) { | |
1558 | PERROR("zmalloc zeros for padding"); | |
1559 | ret = -1; | |
1560 | goto end; | |
1561 | } | |
1562 | ||
6cd525e8 MD |
1563 | ret = lttng_write(fd, zeros, size); |
1564 | if (ret < size) { | |
1d4dfdef DG |
1565 | PERROR("write padding to file"); |
1566 | } | |
1567 | ||
e986c7a1 DG |
1568 | free(zeros); |
1569 | ||
1d4dfdef DG |
1570 | end: |
1571 | return ret; | |
1572 | } | |
1573 | ||
b8aa1682 | 1574 | /* |
7591bab1 | 1575 | * relay_recv_metadata: receive the metadata for the session. |
b8aa1682 | 1576 | */ |
44a2fbf1 JG |
1577 | static int relay_recv_metadata(const struct lttcomm_relayd_hdr *recv_hdr, |
1578 | struct relay_connection *conn, | |
1579 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1580 | { |
32d1569c | 1581 | int ret = 0; |
6cd525e8 | 1582 | ssize_t size_ret; |
58eb9381 | 1583 | struct relay_session *session = conn->session; |
44a2fbf1 | 1584 | struct lttcomm_relayd_metadata_payload metadata_payload_header; |
b8aa1682 | 1585 | struct relay_stream *metadata_stream; |
44a2fbf1 | 1586 | uint64_t metadata_payload_size; |
b8aa1682 JD |
1587 | |
1588 | if (!session) { | |
1589 | ERR("Metadata sent before version check"); | |
1590 | ret = -1; | |
1591 | goto end; | |
1592 | } | |
1593 | ||
44a2fbf1 | 1594 | if (recv_hdr->data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { |
f6416125 MD |
1595 | ERR("Incorrect data size"); |
1596 | ret = -1; | |
1597 | goto end; | |
1598 | } | |
44a2fbf1 JG |
1599 | metadata_payload_size = recv_hdr->data_size - |
1600 | sizeof(struct lttcomm_relayd_metadata_payload); | |
f6416125 | 1601 | |
44a2fbf1 JG |
1602 | memcpy(&metadata_payload_header, payload->data, |
1603 | sizeof(metadata_payload_header)); | |
1604 | metadata_payload_header.stream_id = be64toh( | |
1605 | metadata_payload_header.stream_id); | |
1606 | metadata_payload_header.padding_size = be32toh( | |
1607 | metadata_payload_header.padding_size); | |
c617c0c6 | 1608 | |
44a2fbf1 | 1609 | metadata_stream = stream_get_by_id(metadata_payload_header.stream_id); |
b8aa1682 JD |
1610 | if (!metadata_stream) { |
1611 | ret = -1; | |
7591bab1 | 1612 | goto end; |
b8aa1682 JD |
1613 | } |
1614 | ||
7591bab1 MD |
1615 | pthread_mutex_lock(&metadata_stream->lock); |
1616 | ||
44a2fbf1 JG |
1617 | size_ret = lttng_write(metadata_stream->stream_fd->fd, |
1618 | payload->data + sizeof(metadata_payload_header), | |
1619 | metadata_payload_size); | |
1620 | if (size_ret < metadata_payload_size) { | |
b8aa1682 JD |
1621 | ERR("Relay error writing metadata on file"); |
1622 | ret = -1; | |
7591bab1 | 1623 | goto end_put; |
b8aa1682 | 1624 | } |
1d4dfdef | 1625 | |
32d1569c | 1626 | size_ret = write_padding_to_file(metadata_stream->stream_fd->fd, |
44a2fbf1 JG |
1627 | metadata_payload_header.padding_size); |
1628 | if (size_ret < (int64_t) metadata_payload_header.padding_size) { | |
1629 | ret = -1; | |
7591bab1 | 1630 | goto end_put; |
1d4dfdef | 1631 | } |
2a174661 | 1632 | |
7591bab1 | 1633 | metadata_stream->metadata_received += |
44a2fbf1 | 1634 | metadata_payload_size + metadata_payload_header.padding_size; |
7591bab1 MD |
1635 | DBG2("Relay metadata written. Updated metadata_received %" PRIu64, |
1636 | metadata_stream->metadata_received); | |
1d4dfdef | 1637 | |
7591bab1 MD |
1638 | end_put: |
1639 | pthread_mutex_unlock(&metadata_stream->lock); | |
1640 | stream_put(metadata_stream); | |
b8aa1682 JD |
1641 | end: |
1642 | return ret; | |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * relay_send_version: send relayd version number | |
1647 | */ | |
44a2fbf1 JG |
1648 | static int relay_send_version(const struct lttcomm_relayd_hdr *recv_hdr, |
1649 | struct relay_connection *conn, | |
1650 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1651 | { |
7f51dcba | 1652 | int ret; |
44a2fbf1 | 1653 | ssize_t send_ret; |
092b6259 | 1654 | struct lttcomm_relayd_version reply, msg; |
40096142 | 1655 | bool compatible = true; |
b8aa1682 | 1656 | |
44a2fbf1 | 1657 | conn->version_check_done = true; |
b8aa1682 | 1658 | |
092b6259 | 1659 | /* Get version from the other side. */ |
44a2fbf1 JG |
1660 | if (payload->size < sizeof(msg)) { |
1661 | ERR("Unexpected payload size in \"relay_send_version\": expected >= %zu bytes, got %zu bytes", | |
1662 | sizeof(msg), payload->size); | |
092b6259 | 1663 | ret = -1; |
092b6259 DG |
1664 | goto end; |
1665 | } | |
1666 | ||
44a2fbf1 JG |
1667 | memcpy(&msg, payload->data, sizeof(msg)); |
1668 | msg.major = be32toh(msg.major); | |
1669 | msg.minor = be32toh(msg.minor); | |
1670 | ||
53efb85a | 1671 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
1672 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1673 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1674 | |
1675 | /* Major versions must be the same */ | |
44a2fbf1 | 1676 | if (reply.major != msg.major) { |
6151a90f | 1677 | DBG("Incompatible major versions (%u vs %u), deleting session", |
44a2fbf1 | 1678 | reply.major, msg.major); |
40096142 | 1679 | compatible = false; |
d4519fa3 JD |
1680 | } |
1681 | ||
58eb9381 | 1682 | conn->major = reply.major; |
0f907de1 | 1683 | /* We adapt to the lowest compatible version */ |
44a2fbf1 | 1684 | if (reply.minor <= msg.minor) { |
58eb9381 | 1685 | conn->minor = reply.minor; |
0f907de1 | 1686 | } else { |
44a2fbf1 | 1687 | conn->minor = msg.minor; |
0f907de1 JD |
1688 | } |
1689 | ||
6151a90f JD |
1690 | reply.major = htobe32(reply.major); |
1691 | reply.minor = htobe32(reply.minor); | |
44a2fbf1 JG |
1692 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
1693 | sizeof(reply), 0); | |
1694 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1695 | ERR("Failed to send \"send version\" command reply (ret = %zd)", | |
1696 | send_ret); | |
1697 | ret = -1; | |
1698 | goto end; | |
1699 | } else { | |
1700 | ret = 0; | |
6151a90f JD |
1701 | } |
1702 | ||
40096142 JD |
1703 | if (!compatible) { |
1704 | ret = -1; | |
1705 | goto end; | |
1706 | } | |
1707 | ||
58eb9381 DG |
1708 | DBG("Version check done using protocol %u.%u", conn->major, |
1709 | conn->minor); | |
b8aa1682 JD |
1710 | |
1711 | end: | |
1712 | return ret; | |
1713 | } | |
1714 | ||
c8f59ee5 | 1715 | /* |
6d805429 | 1716 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 | 1717 | */ |
44a2fbf1 JG |
1718 | static int relay_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
1719 | struct relay_connection *conn, | |
1720 | const struct lttng_buffer_view *payload) | |
c8f59ee5 | 1721 | { |
58eb9381 | 1722 | struct relay_session *session = conn->session; |
6d805429 | 1723 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1724 | struct lttcomm_relayd_generic_reply reply; |
1725 | struct relay_stream *stream; | |
44a2fbf1 | 1726 | ssize_t send_ret; |
c8f59ee5 | 1727 | int ret; |
c8f59ee5 | 1728 | |
6d805429 | 1729 | DBG("Data pending command received"); |
c8f59ee5 | 1730 | |
44a2fbf1 | 1731 | if (!session || !conn->version_check_done) { |
c8f59ee5 DG |
1732 | ERR("Trying to check for data before version check"); |
1733 | ret = -1; | |
1734 | goto end_no_session; | |
1735 | } | |
1736 | ||
44a2fbf1 JG |
1737 | if (payload->size < sizeof(msg)) { |
1738 | ERR("Unexpected payload size in \"relay_data_pending\": expected >= %zu bytes, got %zu bytes", | |
1739 | sizeof(msg), payload->size); | |
c8f59ee5 DG |
1740 | ret = -1; |
1741 | goto end_no_session; | |
1742 | } | |
44a2fbf1 JG |
1743 | memcpy(&msg, payload->data, sizeof(msg)); |
1744 | msg.stream_id = be64toh(msg.stream_id); | |
1745 | msg.last_net_seq_num = be64toh(msg.last_net_seq_num); | |
c8f59ee5 | 1746 | |
44a2fbf1 | 1747 | stream = stream_get_by_id(msg.stream_id); |
de91f48a | 1748 | if (stream == NULL) { |
c8f59ee5 | 1749 | ret = -1; |
7591bab1 | 1750 | goto end; |
c8f59ee5 DG |
1751 | } |
1752 | ||
7591bab1 MD |
1753 | pthread_mutex_lock(&stream->lock); |
1754 | ||
6d805429 | 1755 | DBG("Data pending for stream id %" PRIu64 " prev_seq %" PRIu64 |
44a2fbf1 JG |
1756 | " and last_seq %" PRIu64, msg.stream_id, |
1757 | stream->prev_seq, msg.last_net_seq_num); | |
c8f59ee5 | 1758 | |
33832e64 | 1759 | /* Avoid wrapping issue */ |
44a2fbf1 | 1760 | if (((int64_t) (stream->prev_seq - msg.last_net_seq_num)) >= 0) { |
6d805429 | 1761 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1762 | ret = 0; |
6d805429 DG |
1763 | } else { |
1764 | /* Data still being streamed thus pending */ | |
1765 | ret = 1; | |
c8f59ee5 DG |
1766 | } |
1767 | ||
7591bab1 MD |
1768 | stream->data_pending_check_done = true; |
1769 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 1770 | |
7591bab1 MD |
1771 | stream_put(stream); |
1772 | end: | |
c8f59ee5 | 1773 | |
53efb85a | 1774 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1775 | reply.ret_code = htobe32(ret); |
44a2fbf1 JG |
1776 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1777 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1778 | ERR("Failed to send \"data pending\" command reply (ret = %zd)", | |
1779 | send_ret); | |
1780 | ret = -1; | |
c8f59ee5 DG |
1781 | } |
1782 | ||
1783 | end_no_session: | |
1784 | return ret; | |
1785 | } | |
1786 | ||
1787 | /* | |
1788 | * Wait for the control socket to reach a quiescent state. | |
1789 | * | |
7591bab1 MD |
1790 | * Note that for now, when receiving this command from the session |
1791 | * daemon, this means that every subsequent commands or data received on | |
1792 | * the control socket has been handled. So, this is why we simply return | |
1793 | * OK here. | |
c8f59ee5 | 1794 | */ |
44a2fbf1 JG |
1795 | static int relay_quiescent_control(const struct lttcomm_relayd_hdr *recv_hdr, |
1796 | struct relay_connection *conn, | |
1797 | const struct lttng_buffer_view *payload) | |
c8f59ee5 DG |
1798 | { |
1799 | int ret; | |
44a2fbf1 | 1800 | ssize_t send_ret; |
ad7051c0 | 1801 | struct relay_stream *stream; |
ad7051c0 | 1802 | struct lttcomm_relayd_quiescent_control msg; |
c8f59ee5 DG |
1803 | struct lttcomm_relayd_generic_reply reply; |
1804 | ||
1805 | DBG("Checking quiescent state on control socket"); | |
1806 | ||
44a2fbf1 | 1807 | if (!conn->session || !conn->version_check_done) { |
ad7051c0 DG |
1808 | ERR("Trying to check for data before version check"); |
1809 | ret = -1; | |
1810 | goto end_no_session; | |
1811 | } | |
1812 | ||
44a2fbf1 JG |
1813 | if (payload->size < sizeof(msg)) { |
1814 | ERR("Unexpected payload size in \"relay_quiescent_control\": expected >= %zu bytes, got %zu bytes", | |
1815 | sizeof(msg), payload->size); | |
ad7051c0 DG |
1816 | ret = -1; |
1817 | goto end_no_session; | |
1818 | } | |
44a2fbf1 JG |
1819 | memcpy(&msg, payload->data, sizeof(msg)); |
1820 | msg.stream_id = be64toh(msg.stream_id); | |
ad7051c0 | 1821 | |
44a2fbf1 | 1822 | stream = stream_get_by_id(msg.stream_id); |
7591bab1 MD |
1823 | if (!stream) { |
1824 | goto reply; | |
1825 | } | |
1826 | pthread_mutex_lock(&stream->lock); | |
1827 | stream->data_pending_check_done = true; | |
1828 | pthread_mutex_unlock(&stream->lock); | |
44a2fbf1 JG |
1829 | |
1830 | DBG("Relay quiescent control pending flag set to %" PRIu64, msg.stream_id); | |
7591bab1 MD |
1831 | stream_put(stream); |
1832 | reply: | |
53efb85a | 1833 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1834 | reply.ret_code = htobe32(LTTNG_OK); |
44a2fbf1 JG |
1835 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1836 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1837 | ERR("Failed to send \"quiescent control\" command reply (ret = %zd)", | |
1838 | send_ret); | |
1839 | ret = -1; | |
1840 | } else { | |
1841 | ret = 0; | |
c8f59ee5 DG |
1842 | } |
1843 | ||
ad7051c0 | 1844 | end_no_session: |
c8f59ee5 DG |
1845 | return ret; |
1846 | } | |
1847 | ||
f7079f67 | 1848 | /* |
7591bab1 MD |
1849 | * Initialize a data pending command. This means that a consumer is about |
1850 | * to ask for data pending for each stream it holds. Simply iterate over | |
1851 | * all streams of a session and set the data_pending_check_done flag. | |
f7079f67 DG |
1852 | * |
1853 | * This command returns to the client a LTTNG_OK code. | |
1854 | */ | |
44a2fbf1 JG |
1855 | static int relay_begin_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
1856 | struct relay_connection *conn, | |
1857 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
1858 | { |
1859 | int ret; | |
44a2fbf1 | 1860 | ssize_t send_ret; |
f7079f67 DG |
1861 | struct lttng_ht_iter iter; |
1862 | struct lttcomm_relayd_begin_data_pending msg; | |
1863 | struct lttcomm_relayd_generic_reply reply; | |
1864 | struct relay_stream *stream; | |
f7079f67 DG |
1865 | |
1866 | assert(recv_hdr); | |
58eb9381 | 1867 | assert(conn); |
f7079f67 DG |
1868 | |
1869 | DBG("Init streams for data pending"); | |
1870 | ||
44a2fbf1 | 1871 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
1872 | ERR("Trying to check for data before version check"); |
1873 | ret = -1; | |
1874 | goto end_no_session; | |
1875 | } | |
1876 | ||
44a2fbf1 JG |
1877 | if (payload->size < sizeof(msg)) { |
1878 | ERR("Unexpected payload size in \"relay_begin_data_pending\": expected >= %zu bytes, got %zu bytes", | |
1879 | sizeof(msg), payload->size); | |
f7079f67 DG |
1880 | ret = -1; |
1881 | goto end_no_session; | |
1882 | } | |
44a2fbf1 JG |
1883 | memcpy(&msg, payload->data, sizeof(msg)); |
1884 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 DG |
1885 | |
1886 | /* | |
7591bab1 MD |
1887 | * Iterate over all streams to set the begin data pending flag. |
1888 | * For now, the streams are indexed by stream handle so we have | |
1889 | * to iterate over all streams to find the one associated with | |
1890 | * the right session_id. | |
f7079f67 DG |
1891 | */ |
1892 | rcu_read_lock(); | |
d3e2ba59 | 1893 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1894 | node.node) { |
7591bab1 MD |
1895 | if (!stream_get(stream)) { |
1896 | continue; | |
1897 | } | |
44a2fbf1 | 1898 | if (stream->trace->session->id == msg.session_id) { |
7591bab1 MD |
1899 | pthread_mutex_lock(&stream->lock); |
1900 | stream->data_pending_check_done = false; | |
1901 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 DG |
1902 | DBG("Set begin data pending flag to stream %" PRIu64, |
1903 | stream->stream_handle); | |
1904 | } | |
7591bab1 | 1905 | stream_put(stream); |
f7079f67 DG |
1906 | } |
1907 | rcu_read_unlock(); | |
1908 | ||
53efb85a | 1909 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1910 | /* All good, send back reply. */ |
1911 | reply.ret_code = htobe32(LTTNG_OK); | |
1912 | ||
44a2fbf1 JG |
1913 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1914 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1915 | ERR("Failed to send \"begin data pending\" command reply (ret = %zd)", | |
1916 | send_ret); | |
1917 | ret = -1; | |
1918 | } else { | |
1919 | ret = 0; | |
f7079f67 DG |
1920 | } |
1921 | ||
1922 | end_no_session: | |
1923 | return ret; | |
1924 | } | |
1925 | ||
1926 | /* | |
7591bab1 MD |
1927 | * End data pending command. This will check, for a given session id, if |
1928 | * each stream associated with it has its data_pending_check_done flag | |
1929 | * set. If not, this means that the client lost track of the stream but | |
1930 | * the data is still being streamed on our side. In this case, we inform | |
1931 | * the client that data is in flight. | |
f7079f67 DG |
1932 | * |
1933 | * Return to the client if there is data in flight or not with a ret_code. | |
1934 | */ | |
44a2fbf1 JG |
1935 | static int relay_end_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
1936 | struct relay_connection *conn, | |
1937 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
1938 | { |
1939 | int ret; | |
44a2fbf1 | 1940 | ssize_t send_ret; |
f7079f67 DG |
1941 | struct lttng_ht_iter iter; |
1942 | struct lttcomm_relayd_end_data_pending msg; | |
1943 | struct lttcomm_relayd_generic_reply reply; | |
1944 | struct relay_stream *stream; | |
f7079f67 DG |
1945 | uint32_t is_data_inflight = 0; |
1946 | ||
f7079f67 DG |
1947 | DBG("End data pending command"); |
1948 | ||
44a2fbf1 | 1949 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
1950 | ERR("Trying to check for data before version check"); |
1951 | ret = -1; | |
1952 | goto end_no_session; | |
1953 | } | |
1954 | ||
44a2fbf1 JG |
1955 | if (payload->size < sizeof(msg)) { |
1956 | ERR("Unexpected payload size in \"relay_end_data_pending\": expected >= %zu bytes, got %zu bytes", | |
1957 | sizeof(msg), payload->size); | |
f7079f67 DG |
1958 | ret = -1; |
1959 | goto end_no_session; | |
1960 | } | |
44a2fbf1 JG |
1961 | memcpy(&msg, payload->data, sizeof(msg)); |
1962 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 | 1963 | |
7591bab1 MD |
1964 | /* |
1965 | * Iterate over all streams to see if the begin data pending | |
1966 | * flag is set. | |
1967 | */ | |
f7079f67 | 1968 | rcu_read_lock(); |
d3e2ba59 | 1969 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1970 | node.node) { |
7591bab1 MD |
1971 | if (!stream_get(stream)) { |
1972 | continue; | |
1973 | } | |
44a2fbf1 | 1974 | if (stream->trace->session->id != msg.session_id) { |
7591bab1 MD |
1975 | stream_put(stream); |
1976 | continue; | |
1977 | } | |
1978 | pthread_mutex_lock(&stream->lock); | |
1979 | if (!stream->data_pending_check_done) { | |
1980 | if (!stream->closed || !(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) { | |
1981 | is_data_inflight = 1; | |
1982 | DBG("Data is still in flight for stream %" PRIu64, | |
1983 | stream->stream_handle); | |
1984 | pthread_mutex_unlock(&stream->lock); | |
1985 | stream_put(stream); | |
1986 | break; | |
1987 | } | |
f7079f67 | 1988 | } |
7591bab1 MD |
1989 | pthread_mutex_unlock(&stream->lock); |
1990 | stream_put(stream); | |
f7079f67 DG |
1991 | } |
1992 | rcu_read_unlock(); | |
1993 | ||
53efb85a | 1994 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1995 | /* All good, send back reply. */ |
1996 | reply.ret_code = htobe32(is_data_inflight); | |
1997 | ||
44a2fbf1 JG |
1998 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1999 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2000 | ERR("Failed to send \"end data pending\" command reply (ret = %zd)", | |
2001 | send_ret); | |
2002 | ret = -1; | |
2003 | } else { | |
2004 | ret = 0; | |
f7079f67 DG |
2005 | } |
2006 | ||
2007 | end_no_session: | |
2008 | return ret; | |
2009 | } | |
2010 | ||
1c20f0e2 JD |
2011 | /* |
2012 | * Receive an index for a specific stream. | |
2013 | * | |
2014 | * Return 0 on success else a negative value. | |
2015 | */ | |
44a2fbf1 JG |
2016 | static int relay_recv_index(const struct lttcomm_relayd_hdr *recv_hdr, |
2017 | struct relay_connection *conn, | |
2018 | const struct lttng_buffer_view *payload) | |
1c20f0e2 | 2019 | { |
44a2fbf1 JG |
2020 | int ret; |
2021 | ssize_t send_ret; | |
58eb9381 | 2022 | struct relay_session *session = conn->session; |
1c20f0e2 | 2023 | struct lttcomm_relayd_index index_info; |
7591bab1 | 2024 | struct relay_index *index; |
1c20f0e2 JD |
2025 | struct lttcomm_relayd_generic_reply reply; |
2026 | struct relay_stream *stream; | |
e0547b83 | 2027 | size_t msg_len; |
1c20f0e2 | 2028 | |
58eb9381 | 2029 | assert(conn); |
1c20f0e2 JD |
2030 | |
2031 | DBG("Relay receiving index"); | |
2032 | ||
44a2fbf1 | 2033 | if (!session || !conn->version_check_done) { |
1c20f0e2 JD |
2034 | ERR("Trying to close a stream before version check"); |
2035 | ret = -1; | |
2036 | goto end_no_session; | |
2037 | } | |
2038 | ||
e0547b83 MD |
2039 | msg_len = lttcomm_relayd_index_len( |
2040 | lttng_to_index_major(conn->major, conn->minor), | |
2041 | lttng_to_index_minor(conn->major, conn->minor)); | |
44a2fbf1 JG |
2042 | if (payload->size < msg_len) { |
2043 | ERR("Unexpected payload size in \"relay_recv_index\": expected >= %zu bytes, got %zu bytes", | |
2044 | msg_len, payload->size); | |
1c20f0e2 JD |
2045 | ret = -1; |
2046 | goto end_no_session; | |
2047 | } | |
44a2fbf1 JG |
2048 | memcpy(&index_info, payload->data, msg_len); |
2049 | index_info.relay_stream_id = be64toh(index_info.relay_stream_id); | |
2050 | index_info.net_seq_num = be64toh(index_info.net_seq_num); | |
2051 | index_info.packet_size = be64toh(index_info.packet_size); | |
2052 | index_info.content_size = be64toh(index_info.content_size); | |
2053 | index_info.timestamp_begin = be64toh(index_info.timestamp_begin); | |
2054 | index_info.timestamp_end = be64toh(index_info.timestamp_end); | |
2055 | index_info.events_discarded = be64toh(index_info.events_discarded); | |
2056 | index_info.stream_id = be64toh(index_info.stream_id); | |
1c20f0e2 | 2057 | |
44a2fbf1 JG |
2058 | if (conn->minor >= 8) { |
2059 | index_info.stream_instance_id = | |
2060 | be64toh(index_info.stream_instance_id); | |
2061 | index_info.packet_seq_num = be64toh(index_info.packet_seq_num); | |
2062 | } | |
1c20f0e2 | 2063 | |
44a2fbf1 | 2064 | stream = stream_get_by_id(index_info.relay_stream_id); |
1c20f0e2 | 2065 | if (!stream) { |
7591bab1 | 2066 | ERR("stream_get_by_id not found"); |
1c20f0e2 | 2067 | ret = -1; |
7591bab1 | 2068 | goto end; |
1c20f0e2 | 2069 | } |
7591bab1 | 2070 | pthread_mutex_lock(&stream->lock); |
1c20f0e2 | 2071 | |
d3e2ba59 JD |
2072 | /* Live beacon handling */ |
2073 | if (index_info.packet_size == 0) { | |
7591bab1 MD |
2074 | DBG("Received live beacon for stream %" PRIu64, |
2075 | stream->stream_handle); | |
d3e2ba59 JD |
2076 | |
2077 | /* | |
7591bab1 MD |
2078 | * Only flag a stream inactive when it has already |
2079 | * received data and no indexes are in flight. | |
d3e2ba59 | 2080 | */ |
a44ca2ca | 2081 | if (stream->index_received_seqcount > 0 |
7591bab1 | 2082 | && stream->indexes_in_flight == 0) { |
44a2fbf1 | 2083 | stream->beacon_ts_end = index_info.timestamp_end; |
d3e2ba59 JD |
2084 | } |
2085 | ret = 0; | |
7591bab1 | 2086 | goto end_stream_put; |
d3e2ba59 JD |
2087 | } else { |
2088 | stream->beacon_ts_end = -1ULL; | |
2089 | } | |
2090 | ||
528f2ffa | 2091 | if (stream->ctf_stream_id == -1ULL) { |
44a2fbf1 | 2092 | stream->ctf_stream_id = index_info.stream_id; |
528f2ffa | 2093 | } |
44a2fbf1 | 2094 | index = relay_index_get_by_id_or_create(stream, index_info.net_seq_num); |
7591bab1 MD |
2095 | if (!index) { |
2096 | ret = -1; | |
2097 | ERR("relay_index_get_by_id_or_create index NULL"); | |
2098 | goto end_stream_put; | |
1c20f0e2 | 2099 | } |
234cd636 | 2100 | if (set_index_control_data(index, &index_info, conn)) { |
7591bab1 MD |
2101 | ERR("set_index_control_data error"); |
2102 | relay_index_put(index); | |
2103 | ret = -1; | |
2104 | goto end_stream_put; | |
2105 | } | |
2106 | ret = relay_index_try_flush(index); | |
2107 | if (ret == 0) { | |
a44ca2ca MD |
2108 | tracefile_array_commit_seq(stream->tfa); |
2109 | stream->index_received_seqcount++; | |
7591bab1 MD |
2110 | } else if (ret > 0) { |
2111 | /* no flush. */ | |
2112 | ret = 0; | |
2113 | } else { | |
2114 | ERR("relay_index_try_flush error %d", ret); | |
2115 | relay_index_put(index); | |
2116 | ret = -1; | |
1c20f0e2 JD |
2117 | } |
2118 | ||
7591bab1 MD |
2119 | end_stream_put: |
2120 | pthread_mutex_unlock(&stream->lock); | |
2121 | stream_put(stream); | |
2122 | ||
2123 | end: | |
1c20f0e2 | 2124 | |
53efb85a | 2125 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
2126 | if (ret < 0) { |
2127 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
2128 | } else { | |
2129 | reply.ret_code = htobe32(LTTNG_OK); | |
2130 | } | |
58eb9381 | 2131 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
44a2fbf1 JG |
2132 | if (send_ret < (ssize_t) sizeof(reply)) { |
2133 | ERR("Failed to send \"recv index\" command reply (ret = %zd)", send_ret); | |
2134 | ret = -1; | |
1c20f0e2 JD |
2135 | } |
2136 | ||
2137 | end_no_session: | |
2138 | return ret; | |
2139 | } | |
2140 | ||
a4baae1b JD |
2141 | /* |
2142 | * Receive the streams_sent message. | |
2143 | * | |
2144 | * Return 0 on success else a negative value. | |
2145 | */ | |
44a2fbf1 JG |
2146 | static int relay_streams_sent(const struct lttcomm_relayd_hdr *recv_hdr, |
2147 | struct relay_connection *conn, | |
2148 | const struct lttng_buffer_view *payload) | |
a4baae1b | 2149 | { |
44a2fbf1 JG |
2150 | int ret; |
2151 | ssize_t send_ret; | |
a4baae1b JD |
2152 | struct lttcomm_relayd_generic_reply reply; |
2153 | ||
58eb9381 | 2154 | assert(conn); |
a4baae1b JD |
2155 | |
2156 | DBG("Relay receiving streams_sent"); | |
2157 | ||
44a2fbf1 | 2158 | if (!conn->session || !conn->version_check_done) { |
a4baae1b JD |
2159 | ERR("Trying to close a stream before version check"); |
2160 | ret = -1; | |
2161 | goto end_no_session; | |
2162 | } | |
2163 | ||
2164 | /* | |
7591bab1 MD |
2165 | * Publish every pending stream in the connection recv list which are |
2166 | * now ready to be used by the viewer. | |
4a9daf17 | 2167 | */ |
7591bab1 | 2168 | publish_connection_local_streams(conn); |
4a9daf17 | 2169 | |
53efb85a | 2170 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2171 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2172 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
44a2fbf1 JG |
2173 | if (send_ret < (ssize_t) sizeof(reply)) { |
2174 | ERR("Failed to send \"streams sent\" command reply (ret = %zd)", | |
2175 | send_ret); | |
2176 | ret = -1; | |
a4baae1b JD |
2177 | } else { |
2178 | /* Success. */ | |
2179 | ret = 0; | |
2180 | } | |
2181 | ||
2182 | end_no_session: | |
2183 | return ret; | |
2184 | } | |
2185 | ||
44a2fbf1 JG |
2186 | #define DBG_CMD(cmd_name, conn) \ |
2187 | DBG3("Processing \"%s\" command for socket %i", cmd_name, conn->sock->fd); | |
2188 | ||
2189 | static int relay_process_control_command(struct relay_connection *conn, | |
2190 | const struct lttcomm_relayd_hdr *header, | |
2191 | const struct lttng_buffer_view *payload) | |
b8aa1682 JD |
2192 | { |
2193 | int ret = 0; | |
2194 | ||
44a2fbf1 | 2195 | switch (header->cmd) { |
b8aa1682 | 2196 | case RELAYD_CREATE_SESSION: |
44a2fbf1 JG |
2197 | DBG_CMD("RELAYD_CREATE_SESSION", conn); |
2198 | ret = relay_create_session(header, conn, payload); | |
b8aa1682 | 2199 | break; |
b8aa1682 | 2200 | case RELAYD_ADD_STREAM: |
44a2fbf1 JG |
2201 | DBG_CMD("RELAYD_ADD_STREAM", conn); |
2202 | ret = relay_add_stream(header, conn, payload); | |
b8aa1682 JD |
2203 | break; |
2204 | case RELAYD_START_DATA: | |
44a2fbf1 JG |
2205 | DBG_CMD("RELAYD_START_DATA", conn); |
2206 | ret = relay_start(header, conn, payload); | |
b8aa1682 JD |
2207 | break; |
2208 | case RELAYD_SEND_METADATA: | |
44a2fbf1 JG |
2209 | DBG_CMD("RELAYD_SEND_METADATA", conn); |
2210 | ret = relay_recv_metadata(header, conn, payload); | |
b8aa1682 JD |
2211 | break; |
2212 | case RELAYD_VERSION: | |
44a2fbf1 JG |
2213 | DBG_CMD("RELAYD_VERSION", conn); |
2214 | ret = relay_send_version(header, conn, payload); | |
b8aa1682 | 2215 | break; |
173af62f | 2216 | case RELAYD_CLOSE_STREAM: |
44a2fbf1 JG |
2217 | DBG_CMD("RELAYD_CLOSE_STREAM", conn); |
2218 | ret = relay_close_stream(header, conn, payload); | |
173af62f | 2219 | break; |
6d805429 | 2220 | case RELAYD_DATA_PENDING: |
44a2fbf1 JG |
2221 | DBG_CMD("RELAYD_DATA_PENDING", conn); |
2222 | ret = relay_data_pending(header, conn, payload); | |
c8f59ee5 DG |
2223 | break; |
2224 | case RELAYD_QUIESCENT_CONTROL: | |
44a2fbf1 JG |
2225 | DBG_CMD("RELAYD_QUIESCENT_CONTROL", conn); |
2226 | ret = relay_quiescent_control(header, conn, payload); | |
c8f59ee5 | 2227 | break; |
f7079f67 | 2228 | case RELAYD_BEGIN_DATA_PENDING: |
44a2fbf1 JG |
2229 | DBG_CMD("RELAYD_BEGIN_DATA_PENDING", conn); |
2230 | ret = relay_begin_data_pending(header, conn, payload); | |
f7079f67 DG |
2231 | break; |
2232 | case RELAYD_END_DATA_PENDING: | |
44a2fbf1 JG |
2233 | DBG_CMD("RELAYD_END_DATA_PENDING", conn); |
2234 | ret = relay_end_data_pending(header, conn, payload); | |
f7079f67 | 2235 | break; |
1c20f0e2 | 2236 | case RELAYD_SEND_INDEX: |
44a2fbf1 JG |
2237 | DBG_CMD("RELAYD_SEND_INDEX", conn); |
2238 | ret = relay_recv_index(header, conn, payload); | |
1c20f0e2 | 2239 | break; |
a4baae1b | 2240 | case RELAYD_STREAMS_SENT: |
44a2fbf1 JG |
2241 | DBG_CMD("RELAYD_STREAMS_SENT", conn); |
2242 | ret = relay_streams_sent(header, conn, payload); | |
a4baae1b | 2243 | break; |
93ec662e | 2244 | case RELAYD_RESET_METADATA: |
44a2fbf1 JG |
2245 | DBG_CMD("RELAYD_RESET_METADATA", conn); |
2246 | ret = relay_reset_metadata(header, conn, payload); | |
93ec662e | 2247 | break; |
b8aa1682 JD |
2248 | case RELAYD_UPDATE_SYNC_INFO: |
2249 | default: | |
44a2fbf1 | 2250 | ERR("Received unknown command (%u)", header->cmd); |
58eb9381 | 2251 | relay_unknown_command(conn); |
b8aa1682 JD |
2252 | ret = -1; |
2253 | goto end; | |
2254 | } | |
2255 | ||
2256 | end: | |
2257 | return ret; | |
2258 | } | |
2259 | ||
44a2fbf1 JG |
2260 | static enum relay_connection_status relay_process_control_receive_payload( |
2261 | struct relay_connection *conn) | |
2262 | { | |
2263 | int ret = 0; | |
2264 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; | |
2265 | struct lttng_dynamic_buffer *reception_buffer = | |
2266 | &conn->protocol.ctrl.reception_buffer; | |
2267 | struct ctrl_connection_state_receive_payload *state = | |
2268 | &conn->protocol.ctrl.state.receive_payload; | |
2269 | struct lttng_buffer_view payload_view; | |
2270 | ||
2271 | if (state->left_to_receive == 0) { | |
2272 | /* Short-circuit for payload-less commands. */ | |
2273 | goto reception_complete; | |
2274 | } | |
2275 | ret = conn->sock->ops->recvmsg(conn->sock, | |
2276 | reception_buffer->data + state->received, | |
2277 | state->left_to_receive, MSG_DONTWAIT); | |
2278 | if (ret < 0) { | |
2279 | if (errno != EAGAIN && errno != EWOULDBLOCK) { | |
2280 | PERROR("Unable to receive command payload on sock %d", | |
2281 | conn->sock->fd); | |
2282 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2283 | } | |
2284 | goto end; | |
2285 | } else if (ret == 0) { | |
2286 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
2287 | status = RELAY_CONNECTION_STATUS_CLOSED; | |
2288 | goto end; | |
2289 | } | |
2290 | ||
2291 | assert(ret > 0); | |
2292 | assert(ret <= state->left_to_receive); | |
2293 | ||
2294 | state->left_to_receive -= ret; | |
2295 | state->received += ret; | |
2296 | ||
2297 | if (state->left_to_receive > 0) { | |
2298 | /* | |
2299 | * Can't transition to the protocol's next state, wait to | |
2300 | * receive the rest of the header. | |
2301 | */ | |
2302 | DBG3("Partial reception of control connection protocol payload (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
2303 | state->received, state->left_to_receive, | |
2304 | conn->sock->fd); | |
2305 | goto end; | |
2306 | } | |
2307 | ||
2308 | reception_complete: | |
2309 | DBG("Done receiving control command payload: fd = %i, payload size = %" PRIu64 " bytes", | |
2310 | conn->sock->fd, state->received); | |
2311 | /* | |
2312 | * The payload required to process the command has been received. | |
2313 | * A view to the reception buffer is forwarded to the various | |
2314 | * commands and the state of the control is reset on success. | |
2315 | * | |
2316 | * Commands are responsible for sending their reply to the peer. | |
2317 | */ | |
2318 | payload_view = lttng_buffer_view_from_dynamic_buffer(reception_buffer, | |
2319 | 0, -1); | |
2320 | ret = relay_process_control_command(conn, | |
2321 | &state->header, &payload_view); | |
2322 | if (ret < 0) { | |
2323 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2324 | goto end; | |
2325 | } | |
2326 | ||
2327 | ret = connection_reset_protocol_state(conn); | |
2328 | if (ret) { | |
2329 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2330 | } | |
2331 | end: | |
2332 | return status; | |
2333 | } | |
2334 | ||
2335 | static enum relay_connection_status relay_process_control_receive_header( | |
2336 | struct relay_connection *conn) | |
2337 | { | |
2338 | int ret = 0; | |
2339 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; | |
2340 | struct lttcomm_relayd_hdr header; | |
2341 | struct lttng_dynamic_buffer *reception_buffer = | |
2342 | &conn->protocol.ctrl.reception_buffer; | |
2343 | struct ctrl_connection_state_receive_header *state = | |
2344 | &conn->protocol.ctrl.state.receive_header; | |
2345 | ||
2346 | assert(state->left_to_receive != 0); | |
2347 | ||
2348 | ret = conn->sock->ops->recvmsg(conn->sock, | |
2349 | reception_buffer->data + state->received, | |
2350 | state->left_to_receive, MSG_DONTWAIT); | |
2351 | if (ret < 0) { | |
2352 | if (errno != EAGAIN && errno != EWOULDBLOCK) { | |
2353 | PERROR("Unable to receive control command header on sock %d", | |
2354 | conn->sock->fd); | |
2355 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2356 | } | |
2357 | goto end; | |
2358 | } else if (ret == 0) { | |
2359 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
2360 | status = RELAY_CONNECTION_STATUS_CLOSED; | |
2361 | goto end; | |
2362 | } | |
2363 | ||
2364 | assert(ret > 0); | |
2365 | assert(ret <= state->left_to_receive); | |
2366 | ||
2367 | state->left_to_receive -= ret; | |
2368 | state->received += ret; | |
2369 | ||
2370 | if (state->left_to_receive > 0) { | |
2371 | /* | |
2372 | * Can't transition to the protocol's next state, wait to | |
2373 | * receive the rest of the header. | |
2374 | */ | |
2375 | DBG3("Partial reception of control connection protocol header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
2376 | state->received, state->left_to_receive, | |
2377 | conn->sock->fd); | |
2378 | goto end; | |
2379 | } | |
2380 | ||
2381 | /* Transition to next state: receiving the command's payload. */ | |
2382 | conn->protocol.ctrl.state_id = | |
2383 | CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
2384 | memcpy(&header, reception_buffer->data, sizeof(header)); | |
2385 | header.circuit_id = be64toh(header.circuit_id); | |
2386 | header.data_size = be64toh(header.data_size); | |
2387 | header.cmd = be32toh(header.cmd); | |
2388 | header.cmd_version = be32toh(header.cmd_version); | |
2389 | memcpy(&conn->protocol.ctrl.state.receive_payload.header, | |
2390 | &header, sizeof(header)); | |
2391 | ||
2392 | DBG("Done receiving control command header: fd = %i, cmd = %" PRIu32 ", cmd_version = %" PRIu32 ", payload size = %" PRIu64 " bytes", | |
2393 | conn->sock->fd, header.cmd, header.cmd_version, | |
2394 | header.data_size); | |
2395 | ||
2396 | if (header.data_size > DEFAULT_NETWORK_RELAYD_CTRL_MAX_PAYLOAD_SIZE) { | |
2397 | ERR("Command header indicates a payload (%" PRIu64 " bytes) that exceeds the maximal payload size allowed on a control connection.", | |
2398 | header.data_size); | |
2399 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2400 | goto end; | |
2401 | } | |
2402 | ||
2403 | conn->protocol.ctrl.state.receive_payload.left_to_receive = | |
2404 | header.data_size; | |
2405 | conn->protocol.ctrl.state.receive_payload.received = 0; | |
2406 | ret = lttng_dynamic_buffer_set_size(reception_buffer, | |
2407 | header.data_size); | |
2408 | if (ret) { | |
2409 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2410 | goto end; | |
2411 | } | |
2412 | ||
2413 | if (header.data_size == 0) { | |
2414 | /* | |
2415 | * Manually invoke the next state as the poll loop | |
2416 | * will not wake-up to allow us to proceed further. | |
2417 | */ | |
2418 | status = relay_process_control_receive_payload(conn); | |
2419 | } | |
2420 | end: | |
2421 | return status; | |
2422 | } | |
2423 | ||
2424 | /* | |
2425 | * Process the commands received on the control socket | |
2426 | */ | |
2427 | static enum relay_connection_status relay_process_control( | |
2428 | struct relay_connection *conn) | |
2429 | { | |
2430 | enum relay_connection_status status; | |
2431 | ||
2432 | switch (conn->protocol.ctrl.state_id) { | |
2433 | case CTRL_CONNECTION_STATE_RECEIVE_HEADER: | |
2434 | status = relay_process_control_receive_header(conn); | |
2435 | break; | |
2436 | case CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
2437 | status = relay_process_control_receive_payload(conn); | |
2438 | break; | |
2439 | default: | |
2440 | ERR("Unknown control connection protocol state encountered."); | |
2441 | abort(); | |
2442 | } | |
2443 | ||
2444 | return status; | |
2445 | } | |
2446 | ||
7d2f7452 DG |
2447 | /* |
2448 | * Handle index for a data stream. | |
2449 | * | |
7591bab1 | 2450 | * Called with the stream lock held. |
7d2f7452 DG |
2451 | * |
2452 | * Return 0 on success else a negative value. | |
2453 | */ | |
2454 | static int handle_index_data(struct relay_stream *stream, uint64_t net_seq_num, | |
44a2fbf1 | 2455 | bool rotate_index) |
7d2f7452 | 2456 | { |
7591bab1 MD |
2457 | int ret = 0; |
2458 | uint64_t data_offset; | |
2459 | struct relay_index *index; | |
7d2f7452 | 2460 | |
7d2f7452 DG |
2461 | /* Get data offset because we are about to update the index. */ |
2462 | data_offset = htobe64(stream->tracefile_size_current); | |
2463 | ||
65d66b19 MD |
2464 | DBG("handle_index_data: stream %" PRIu64 " net_seq_num %" PRIu64 " data offset %" PRIu64, |
2465 | stream->stream_handle, net_seq_num, stream->tracefile_size_current); | |
7591bab1 | 2466 | |
7d2f7452 | 2467 | /* |
7591bab1 MD |
2468 | * Lookup for an existing index for that stream id/sequence |
2469 | * number. If it exists, the control thread has already received the | |
2470 | * data for it, thus we need to write it to disk. | |
7d2f7452 | 2471 | */ |
7591bab1 | 2472 | index = relay_index_get_by_id_or_create(stream, net_seq_num); |
7d2f7452 | 2473 | if (!index) { |
7591bab1 MD |
2474 | ret = -1; |
2475 | goto end; | |
7d2f7452 DG |
2476 | } |
2477 | ||
e0547b83 MD |
2478 | if (rotate_index || !stream->index_file) { |
2479 | uint32_t major, minor; | |
7591bab1 | 2480 | |
e0547b83 MD |
2481 | /* Put ref on previous index_file. */ |
2482 | if (stream->index_file) { | |
2483 | lttng_index_file_put(stream->index_file); | |
2484 | stream->index_file = NULL; | |
7d2f7452 | 2485 | } |
e0547b83 MD |
2486 | major = stream->trace->session->major; |
2487 | minor = stream->trace->session->minor; | |
2488 | stream->index_file = lttng_index_file_create(stream->path_name, | |
2489 | stream->channel_name, | |
7591bab1 | 2490 | -1, -1, stream->tracefile_size, |
e0547b83 MD |
2491 | tracefile_array_get_file_index_head(stream->tfa), |
2492 | lttng_to_index_major(major, minor), | |
2493 | lttng_to_index_minor(major, minor)); | |
2494 | if (!stream->index_file) { | |
7591bab1 MD |
2495 | ret = -1; |
2496 | /* Put self-ref for this index due to error. */ | |
2497 | relay_index_put(index); | |
e0547b83 | 2498 | index = NULL; |
7591bab1 | 2499 | goto end; |
7d2f7452 | 2500 | } |
7d2f7452 DG |
2501 | } |
2502 | ||
e0547b83 | 2503 | if (relay_index_set_file(index, stream->index_file, data_offset)) { |
7591bab1 MD |
2504 | ret = -1; |
2505 | /* Put self-ref for this index due to error. */ | |
2506 | relay_index_put(index); | |
e0547b83 | 2507 | index = NULL; |
7591bab1 | 2508 | goto end; |
7d2f7452 DG |
2509 | } |
2510 | ||
7591bab1 MD |
2511 | ret = relay_index_try_flush(index); |
2512 | if (ret == 0) { | |
a44ca2ca MD |
2513 | tracefile_array_commit_seq(stream->tfa); |
2514 | stream->index_received_seqcount++; | |
7591bab1 MD |
2515 | } else if (ret > 0) { |
2516 | /* No flush. */ | |
2517 | ret = 0; | |
2518 | } else { | |
2519 | /* Put self-ref for this index due to error. */ | |
2520 | relay_index_put(index); | |
e0547b83 | 2521 | index = NULL; |
7591bab1 MD |
2522 | ret = -1; |
2523 | } | |
2524 | end: | |
7d2f7452 DG |
2525 | return ret; |
2526 | } | |
2527 | ||
44a2fbf1 JG |
2528 | static enum relay_connection_status relay_process_data_receive_header( |
2529 | struct relay_connection *conn) | |
b8aa1682 | 2530 | { |
44a2fbf1 JG |
2531 | int ret; |
2532 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; | |
2533 | struct data_connection_state_receive_header *state = | |
2534 | &conn->protocol.data.state.receive_header; | |
2535 | struct lttcomm_relayd_data_hdr header; | |
b8aa1682 | 2536 | struct relay_stream *stream; |
b8aa1682 | 2537 | |
44a2fbf1 JG |
2538 | assert(state->left_to_receive != 0); |
2539 | ||
2540 | ret = conn->sock->ops->recvmsg(conn->sock, | |
2541 | state->header_reception_buffer + state->received, | |
2542 | state->left_to_receive, MSG_DONTWAIT); | |
2543 | if (ret < 0) { | |
2544 | if (errno != EAGAIN && errno != EWOULDBLOCK) { | |
2545 | PERROR("Unable to receive data header on sock %d", conn->sock->fd); | |
2546 | status = RELAY_CONNECTION_STATUS_ERROR; | |
a6cd2b97 | 2547 | } |
44a2fbf1 JG |
2548 | goto end; |
2549 | } else if (ret == 0) { | |
2550 | /* Orderly shutdown. Not necessary to print an error. */ | |
2551 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
2552 | status = RELAY_CONNECTION_STATUS_CLOSED; | |
b8aa1682 JD |
2553 | goto end; |
2554 | } | |
2555 | ||
44a2fbf1 JG |
2556 | assert(ret > 0); |
2557 | assert(ret <= state->left_to_receive); | |
2558 | ||
2559 | state->left_to_receive -= ret; | |
2560 | state->received += ret; | |
2561 | ||
2562 | if (state->left_to_receive > 0) { | |
2563 | /* | |
2564 | * Can't transition to the protocol's next state, wait to | |
2565 | * receive the rest of the header. | |
2566 | */ | |
2567 | DBG3("Partial reception of data connection header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
2568 | state->received, state->left_to_receive, | |
2569 | conn->sock->fd); | |
2570 | ret = 0; | |
7591bab1 | 2571 | goto end; |
b8aa1682 | 2572 | } |
b8aa1682 | 2573 | |
44a2fbf1 JG |
2574 | /* Transition to next state: receiving the payload. */ |
2575 | conn->protocol.data.state_id = DATA_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
173af62f | 2576 | |
44a2fbf1 JG |
2577 | memcpy(&header, state->header_reception_buffer, sizeof(header)); |
2578 | header.circuit_id = be64toh(header.circuit_id); | |
2579 | header.stream_id = be64toh(header.stream_id); | |
2580 | header.data_size = be32toh(header.data_size); | |
2581 | header.net_seq_num = be64toh(header.net_seq_num); | |
2582 | header.padding_size = be32toh(header.padding_size); | |
2583 | memcpy(&conn->protocol.data.state.receive_payload.header, &header, sizeof(header)); | |
2584 | ||
2585 | conn->protocol.data.state.receive_payload.left_to_receive = | |
2586 | header.data_size; | |
2587 | conn->protocol.data.state.receive_payload.received = 0; | |
2588 | conn->protocol.data.state.receive_payload.rotate_index = false; | |
2589 | ||
2590 | DBG("Received data connection header on fd %i: circuit_id = %" PRIu64 ", stream_id = %" PRIu64 ", data_size = %" PRIu32 ", net_seq_num = %" PRIu64 ", padding_size = %" PRIu32, | |
2591 | conn->sock->fd, header.circuit_id, | |
2592 | header.stream_id, header.data_size, | |
2593 | header.net_seq_num, header.padding_size); | |
2594 | ||
2595 | stream = stream_get_by_id(header.stream_id); | |
2596 | if (!stream) { | |
2597 | DBG("relay_process_data_receive_payload: Cannot find stream %" PRIu64, | |
2598 | header.stream_id); | |
2599 | /* Protocol error. */ | |
2600 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2601 | goto end; | |
2602 | } | |
b8aa1682 | 2603 | |
7591bab1 MD |
2604 | pthread_mutex_lock(&stream->lock); |
2605 | ||
1c20f0e2 | 2606 | /* Check if a rotation is needed. */ |
0f907de1 | 2607 | if (stream->tracefile_size > 0 && |
44a2fbf1 | 2608 | (stream->tracefile_size_current + header.data_size) > |
0f907de1 | 2609 | stream->tracefile_size) { |
a44ca2ca MD |
2610 | uint64_t old_id, new_id; |
2611 | ||
2612 | old_id = tracefile_array_get_file_index_head(stream->tfa); | |
2613 | tracefile_array_file_rotate(stream->tfa); | |
2614 | ||
2615 | /* new_id is updated by utils_rotate_stream_file. */ | |
2616 | new_id = old_id; | |
6b6b9a5a | 2617 | |
7591bab1 MD |
2618 | ret = utils_rotate_stream_file(stream->path_name, |
2619 | stream->channel_name, stream->tracefile_size, | |
2620 | stream->tracefile_count, -1, | |
2621 | -1, stream->stream_fd->fd, | |
a44ca2ca | 2622 | &new_id, &stream->stream_fd->fd); |
0f907de1 | 2623 | if (ret < 0) { |
44a2fbf1 JG |
2624 | ERR("Failed to rotate stream output file"); |
2625 | status = RELAY_CONNECTION_STATUS_ERROR; | |
7591bab1 MD |
2626 | goto end_stream_unlock; |
2627 | } | |
44a2fbf1 | 2628 | |
7591bab1 MD |
2629 | /* |
2630 | * Reset current size because we just performed a stream | |
2631 | * rotation. | |
2632 | */ | |
a6976990 | 2633 | stream->tracefile_size_current = 0; |
44a2fbf1 | 2634 | conn->protocol.data.state.receive_payload.rotate_index = true; |
1c20f0e2 JD |
2635 | } |
2636 | ||
44a2fbf1 JG |
2637 | ret = 0; |
2638 | end_stream_unlock: | |
2639 | pthread_mutex_unlock(&stream->lock); | |
2640 | stream_put(stream); | |
2641 | end: | |
2642 | return status; | |
2643 | } | |
2644 | ||
2645 | static enum relay_connection_status relay_process_data_receive_payload( | |
2646 | struct relay_connection *conn) | |
2647 | { | |
2648 | int ret; | |
2649 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; | |
2650 | struct relay_stream *stream; | |
2651 | struct data_connection_state_receive_payload *state = | |
2652 | &conn->protocol.data.state.receive_payload; | |
2653 | const size_t chunk_size = RECV_DATA_BUFFER_SIZE; | |
2654 | char data_buffer[chunk_size]; | |
2655 | bool partial_recv = false; | |
2656 | bool new_stream = false, close_requested = false; | |
2657 | uint64_t left_to_receive = state->left_to_receive; | |
2658 | struct relay_session *session; | |
2659 | ||
2660 | DBG3("Receiving data for stream id %" PRIu64 " seqnum %" PRIu64 ", %" PRIu64" bytes received, %" PRIu64 " bytes left to receive", | |
2661 | state->header.stream_id, state->header.net_seq_num, | |
2662 | state->received, left_to_receive); | |
2663 | ||
2664 | stream = stream_get_by_id(state->header.stream_id); | |
2665 | if (!stream) { | |
2666 | /* Protocol error. */ | |
2667 | ERR("relay_process_data_receive_payload: cannot find stream %" PRIu64, | |
2668 | state->header.stream_id); | |
2669 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2670 | goto end; | |
2671 | } | |
2672 | ||
2673 | pthread_mutex_lock(&stream->lock); | |
2674 | session = stream->trace->session; | |
2675 | if (!conn->session) { | |
2676 | ret = connection_set_session(conn, session); | |
2677 | if (ret) { | |
2678 | status = RELAY_CONNECTION_STATUS_ERROR; | |
7591bab1 | 2679 | goto end_stream_unlock; |
1c20f0e2 | 2680 | } |
1c20f0e2 JD |
2681 | } |
2682 | ||
44a2fbf1 JG |
2683 | /* |
2684 | * The size of the "chunk" received on any iteration is bounded by: | |
2685 | * - the data left to receive, | |
2686 | * - the data immediately available on the socket, | |
2687 | * - the on-stack data buffer | |
2688 | */ | |
2689 | while (left_to_receive > 0 && !partial_recv) { | |
2690 | ssize_t write_ret; | |
2691 | size_t recv_size = min(left_to_receive, chunk_size); | |
1d4dfdef | 2692 | |
44a2fbf1 JG |
2693 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, |
2694 | recv_size, MSG_DONTWAIT); | |
2695 | if (ret < 0) { | |
2696 | if (errno != EAGAIN && errno != EWOULDBLOCK) { | |
2697 | PERROR("Socket %d error", conn->sock->fd); | |
2698 | status = RELAY_CONNECTION_STATUS_ERROR; | |
0848dba7 | 2699 | } |
0848dba7 | 2700 | goto end_stream_unlock; |
44a2fbf1 JG |
2701 | } else if (ret == 0) { |
2702 | /* No more data ready to be consumed on socket. */ | |
2703 | DBG3("No more data ready for consumption on data socket of stream id %" PRIu64, | |
2704 | state->header.stream_id); | |
2705 | status = RELAY_CONNECTION_STATUS_CLOSED; | |
2706 | break; | |
2707 | } else if (ret < (int) recv_size) { | |
2708 | /* | |
2709 | * All the data available on the socket has been | |
2710 | * consumed. | |
2711 | */ | |
2712 | partial_recv = true; | |
0848dba7 MD |
2713 | } |
2714 | ||
44a2fbf1 JG |
2715 | recv_size = ret; |
2716 | ||
0848dba7 | 2717 | /* Write data to stream output fd. */ |
44a2fbf1 | 2718 | write_ret = lttng_write(stream->stream_fd->fd, data_buffer, |
0848dba7 | 2719 | recv_size); |
44a2fbf1 | 2720 | if (write_ret < (ssize_t) recv_size) { |
0848dba7 | 2721 | ERR("Relay error writing data to file"); |
44a2fbf1 | 2722 | status = RELAY_CONNECTION_STATUS_ERROR; |
0848dba7 MD |
2723 | goto end_stream_unlock; |
2724 | } | |
2725 | ||
44a2fbf1 JG |
2726 | left_to_receive -= recv_size; |
2727 | state->received += recv_size; | |
2728 | state->left_to_receive = left_to_receive; | |
2729 | ||
0848dba7 | 2730 | DBG2("Relay wrote %zd bytes to tracefile for stream id %" PRIu64, |
44a2fbf1 JG |
2731 | write_ret, stream->stream_handle); |
2732 | } | |
2733 | ||
2734 | if (state->left_to_receive > 0) { | |
2735 | /* | |
2736 | * Did not receive all the data expected, wait for more data to | |
2737 | * become available on the socket. | |
2738 | */ | |
2739 | DBG3("Partial receive on data connection of stream id %" PRIu64 ", %" PRIu64 " bytes received, %" PRIu64 " bytes left to receive", | |
2740 | state->header.stream_id, state->received, | |
2741 | state->left_to_receive); | |
2742 | goto end_stream_unlock; | |
0848dba7 | 2743 | } |
5ab7344e | 2744 | |
7591bab1 | 2745 | ret = write_padding_to_file(stream->stream_fd->fd, |
44a2fbf1 JG |
2746 | state->header.padding_size); |
2747 | if ((int64_t) ret < (int64_t) state->header.padding_size) { | |
65d66b19 | 2748 | ERR("write_padding_to_file: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
44a2fbf1 JG |
2749 | stream->stream_handle, |
2750 | state->header.net_seq_num, ret); | |
2751 | status = RELAY_CONNECTION_STATUS_ERROR; | |
7591bab1 | 2752 | goto end_stream_unlock; |
1d4dfdef | 2753 | } |
44a2fbf1 JG |
2754 | |
2755 | ||
2756 | if (session->minor >= 4 && !session->snapshot) { | |
2757 | ret = handle_index_data(stream, state->header.net_seq_num, | |
2758 | state->rotate_index); | |
2759 | if (ret < 0) { | |
2760 | ERR("handle_index_data: fail stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", | |
2761 | stream->stream_handle, | |
2762 | state->header.net_seq_num, ret); | |
2763 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2764 | goto end_stream_unlock; | |
2765 | } | |
2766 | } | |
2767 | ||
2768 | stream->tracefile_size_current += state->header.data_size + | |
2769 | state->header.padding_size; | |
2770 | ||
c0bae11d MD |
2771 | if (stream->prev_seq == -1ULL) { |
2772 | new_stream = true; | |
2773 | } | |
2774 | ||
44a2fbf1 JG |
2775 | stream->prev_seq = state->header.net_seq_num; |
2776 | ||
2777 | /* | |
2778 | * Resetting the protocol state (to RECEIVE_HEADER) will trash the | |
2779 | * contents of *state which are aliased (union) to the same location as | |
2780 | * the new state. Don't use it beyond this point. | |
2781 | */ | |
2782 | connection_reset_protocol_state(conn); | |
2783 | state = NULL; | |
173af62f | 2784 | |
7591bab1 | 2785 | end_stream_unlock: |
bda7c7b9 | 2786 | close_requested = stream->close_requested; |
7591bab1 | 2787 | pthread_mutex_unlock(&stream->lock); |
44a2fbf1 | 2788 | if (close_requested && left_to_receive == 0) { |
bda7c7b9 JG |
2789 | try_stream_close(stream); |
2790 | } | |
2791 | ||
c0bae11d MD |
2792 | if (new_stream) { |
2793 | pthread_mutex_lock(&session->lock); | |
2794 | uatomic_set(&session->new_streams, 1); | |
2795 | pthread_mutex_unlock(&session->lock); | |
2796 | } | |
44a2fbf1 | 2797 | |
7591bab1 | 2798 | stream_put(stream); |
b8aa1682 | 2799 | end: |
44a2fbf1 JG |
2800 | return status; |
2801 | } | |
2802 | ||
2803 | /* | |
2804 | * relay_process_data: Process the data received on the data socket | |
2805 | */ | |
2806 | static enum relay_connection_status relay_process_data( | |
2807 | struct relay_connection *conn) | |
2808 | { | |
2809 | enum relay_connection_status status; | |
2810 | ||
2811 | switch (conn->protocol.data.state_id) { | |
2812 | case DATA_CONNECTION_STATE_RECEIVE_HEADER: | |
2813 | status = relay_process_data_receive_header(conn); | |
2814 | break; | |
2815 | case DATA_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
2816 | status = relay_process_data_receive_payload(conn); | |
2817 | break; | |
2818 | default: | |
2819 | ERR("Unexpected data connection communication state."); | |
2820 | abort(); | |
2821 | } | |
2822 | ||
2823 | return status; | |
b8aa1682 JD |
2824 | } |
2825 | ||
7591bab1 | 2826 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
2827 | { |
2828 | int ret; | |
2829 | ||
58eb9381 | 2830 | (void) lttng_poll_del(events, pollfd); |
b8aa1682 JD |
2831 | |
2832 | ret = close(pollfd); | |
2833 | if (ret < 0) { | |
2834 | ERR("Closing pollfd %d", pollfd); | |
2835 | } | |
2836 | } | |
2837 | ||
7591bab1 MD |
2838 | static void relay_thread_close_connection(struct lttng_poll_event *events, |
2839 | int pollfd, struct relay_connection *conn) | |
9d1bbf21 | 2840 | { |
7591bab1 | 2841 | const char *type_str; |
2a174661 | 2842 | |
7591bab1 MD |
2843 | switch (conn->type) { |
2844 | case RELAY_DATA: | |
2845 | type_str = "Data"; | |
2846 | break; | |
2847 | case RELAY_CONTROL: | |
2848 | type_str = "Control"; | |
2849 | break; | |
2850 | case RELAY_VIEWER_COMMAND: | |
2851 | type_str = "Viewer Command"; | |
2852 | break; | |
2853 | case RELAY_VIEWER_NOTIFICATION: | |
2854 | type_str = "Viewer Notification"; | |
2855 | break; | |
2856 | default: | |
2857 | type_str = "Unknown"; | |
9d1bbf21 | 2858 | } |
7591bab1 MD |
2859 | cleanup_connection_pollfd(events, pollfd); |
2860 | connection_put(conn); | |
2861 | DBG("%s connection closed with %d", type_str, pollfd); | |
b8aa1682 JD |
2862 | } |
2863 | ||
2864 | /* | |
2865 | * This thread does the actual work | |
2866 | */ | |
7591bab1 | 2867 | static void *relay_thread_worker(void *data) |
b8aa1682 | 2868 | { |
beaad64c DG |
2869 | int ret, err = -1, last_seen_data_fd = -1; |
2870 | uint32_t nb_fd; | |
b8aa1682 JD |
2871 | struct lttng_poll_event events; |
2872 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 2873 | struct lttng_ht_iter iter; |
90e7d72f | 2874 | struct relay_connection *destroy_conn = NULL; |
b8aa1682 JD |
2875 | |
2876 | DBG("[thread] Relay worker started"); | |
2877 | ||
9d1bbf21 MD |
2878 | rcu_register_thread(); |
2879 | ||
55706a7d MD |
2880 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
2881 | ||
9b5e0863 MD |
2882 | if (testpoint(relayd_thread_worker)) { |
2883 | goto error_testpoint; | |
2884 | } | |
2885 | ||
f385ae0a MD |
2886 | health_code_update(); |
2887 | ||
b8aa1682 JD |
2888 | /* table of connections indexed on socket */ |
2889 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
2890 | if (!relay_connections_ht) { |
2891 | goto relay_connections_ht_error; | |
2892 | } | |
b8aa1682 | 2893 | |
b8aa1682 JD |
2894 | ret = create_thread_poll_set(&events, 2); |
2895 | if (ret < 0) { | |
2896 | goto error_poll_create; | |
2897 | } | |
2898 | ||
58eb9381 | 2899 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
2900 | if (ret < 0) { |
2901 | goto error; | |
2902 | } | |
2903 | ||
beaad64c | 2904 | restart: |
b8aa1682 | 2905 | while (1) { |
beaad64c DG |
2906 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
2907 | ||
f385ae0a MD |
2908 | health_code_update(); |
2909 | ||
b8aa1682 | 2910 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 2911 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 2912 | health_poll_entry(); |
b8aa1682 | 2913 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 2914 | health_poll_exit(); |
b8aa1682 JD |
2915 | if (ret < 0) { |
2916 | /* | |
2917 | * Restart interrupted system call. | |
2918 | */ | |
2919 | if (errno == EINTR) { | |
2920 | goto restart; | |
2921 | } | |
2922 | goto error; | |
2923 | } | |
2924 | ||
0d9c5d77 DG |
2925 | nb_fd = ret; |
2926 | ||
beaad64c | 2927 | /* |
7591bab1 MD |
2928 | * Process control. The control connection is |
2929 | * prioritized so we don't starve it with high | |
2930 | * throughput tracing data on the data connection. | |
beaad64c | 2931 | */ |
b8aa1682 JD |
2932 | for (i = 0; i < nb_fd; i++) { |
2933 | /* Fetch once the poll data */ | |
beaad64c DG |
2934 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
2935 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 2936 | |
f385ae0a MD |
2937 | health_code_update(); |
2938 | ||
fd20dac9 | 2939 | if (!revents) { |
7591bab1 MD |
2940 | /* |
2941 | * No activity for this FD (poll | |
2942 | * implementation). | |
2943 | */ | |
fd20dac9 MD |
2944 | continue; |
2945 | } | |
2946 | ||
b8aa1682 JD |
2947 | /* Thread quit pipe has been closed. Killing thread. */ |
2948 | ret = check_thread_quit_pipe(pollfd, revents); | |
2949 | if (ret) { | |
095a4ae5 MD |
2950 | err = 0; |
2951 | goto exit; | |
b8aa1682 JD |
2952 | } |
2953 | ||
58eb9381 DG |
2954 | /* Inspect the relay conn pipe for new connection */ |
2955 | if (pollfd == relay_conn_pipe[0]) { | |
03e43155 | 2956 | if (revents & LPOLLIN) { |
90e7d72f JG |
2957 | struct relay_connection *conn; |
2958 | ||
58eb9381 | 2959 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
2960 | if (ret < 0) { |
2961 | goto error; | |
2962 | } | |
58eb9381 DG |
2963 | lttng_poll_add(&events, conn->sock->fd, |
2964 | LPOLLIN | LPOLLRDHUP); | |
7591bab1 | 2965 | connection_ht_add(relay_connections_ht, conn); |
58eb9381 | 2966 | DBG("Connection socket %d added", conn->sock->fd); |
03e43155 MD |
2967 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2968 | ERR("Relay connection pipe error"); | |
2969 | goto error; | |
2970 | } else { | |
2971 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2972 | goto error; | |
b8aa1682 | 2973 | } |
58eb9381 | 2974 | } else { |
90e7d72f JG |
2975 | struct relay_connection *ctrl_conn; |
2976 | ||
7591bab1 | 2977 | ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
58eb9381 | 2978 | /* If not found, there is a synchronization issue. */ |
90e7d72f | 2979 | assert(ctrl_conn); |
58eb9381 | 2980 | |
03e43155 MD |
2981 | if (ctrl_conn->type == RELAY_DATA) { |
2982 | if (revents & LPOLLIN) { | |
beaad64c DG |
2983 | /* |
2984 | * Flag the last seen data fd not deleted. It will be | |
2985 | * used as the last seen fd if any fd gets deleted in | |
2986 | * this first loop. | |
2987 | */ | |
2988 | last_notdel_data_fd = pollfd; | |
2989 | } | |
03e43155 MD |
2990 | goto put_ctrl_connection; |
2991 | } | |
2992 | assert(ctrl_conn->type == RELAY_CONTROL); | |
2993 | ||
2994 | if (revents & LPOLLIN) { | |
44a2fbf1 JG |
2995 | enum relay_connection_status status; |
2996 | ||
2997 | status = relay_process_control(ctrl_conn); | |
2998 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
2999 | /* | |
3000 | * On socket error flag the session as aborted to force | |
3001 | * the cleanup of its stream otherwise it can leak | |
3002 | * during the lifetime of the relayd. | |
3003 | * | |
3004 | * This prevents situations in which streams can be | |
3005 | * left opened because an index was received, the | |
3006 | * control connection is closed, and the data | |
3007 | * connection is closed (uncleanly) before the packet's | |
3008 | * data provided. | |
3009 | * | |
3010 | * Since the control connection encountered an error, | |
3011 | * it is okay to be conservative and close the | |
3012 | * session right now as we can't rely on the protocol | |
3013 | * being respected anymore. | |
3014 | */ | |
3015 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
3016 | session_abort(ctrl_conn->session); | |
03e43155 | 3017 | } |
44a2fbf1 JG |
3018 | |
3019 | /* Clear the connection on error or close. */ | |
3020 | relay_thread_close_connection(&events, | |
3021 | pollfd, | |
3022 | ctrl_conn); | |
03e43155 | 3023 | } |
44a2fbf1 | 3024 | seen_control = 1; |
03e43155 MD |
3025 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3026 | relay_thread_close_connection(&events, | |
3027 | pollfd, ctrl_conn); | |
3028 | if (last_seen_data_fd == pollfd) { | |
3029 | last_seen_data_fd = last_notdel_data_fd; | |
3030 | } | |
58eb9381 | 3031 | } else { |
03e43155 MD |
3032 | ERR("Unexpected poll events %u for control sock %d", |
3033 | revents, pollfd); | |
3034 | connection_put(ctrl_conn); | |
3035 | goto error; | |
beaad64c | 3036 | } |
03e43155 | 3037 | put_ctrl_connection: |
7591bab1 | 3038 | connection_put(ctrl_conn); |
beaad64c DG |
3039 | } |
3040 | } | |
3041 | ||
3042 | /* | |
3043 | * The last loop handled a control request, go back to poll to make | |
3044 | * sure we prioritise the control socket. | |
3045 | */ | |
3046 | if (seen_control) { | |
3047 | continue; | |
3048 | } | |
3049 | ||
3050 | if (last_seen_data_fd >= 0) { | |
3051 | for (i = 0; i < nb_fd; i++) { | |
3052 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
3053 | |
3054 | health_code_update(); | |
3055 | ||
beaad64c DG |
3056 | if (last_seen_data_fd == pollfd) { |
3057 | idx = i; | |
3058 | break; | |
3059 | } | |
3060 | } | |
3061 | } | |
3062 | ||
3063 | /* Process data connection. */ | |
3064 | for (i = idx + 1; i < nb_fd; i++) { | |
3065 | /* Fetch the poll data. */ | |
3066 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
3067 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
90e7d72f | 3068 | struct relay_connection *data_conn; |
beaad64c | 3069 | |
f385ae0a MD |
3070 | health_code_update(); |
3071 | ||
fd20dac9 MD |
3072 | if (!revents) { |
3073 | /* No activity for this FD (poll implementation). */ | |
3074 | continue; | |
3075 | } | |
3076 | ||
beaad64c | 3077 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 3078 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
3079 | continue; |
3080 | } | |
3081 | ||
7591bab1 | 3082 | data_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
90e7d72f | 3083 | if (!data_conn) { |
fd20dac9 | 3084 | /* Skip it. Might be removed before. */ |
fd20dac9 MD |
3085 | continue; |
3086 | } | |
03e43155 MD |
3087 | if (data_conn->type == RELAY_CONTROL) { |
3088 | goto put_data_connection; | |
3089 | } | |
3090 | assert(data_conn->type == RELAY_DATA); | |
fd20dac9 MD |
3091 | |
3092 | if (revents & LPOLLIN) { | |
44a2fbf1 JG |
3093 | enum relay_connection_status status; |
3094 | ||
3095 | status = relay_process_data(data_conn); | |
3096 | /* Connection closed or error. */ | |
3097 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
3098 | /* | |
3099 | * On socket error flag the session as aborted to force | |
3100 | * the cleanup of its stream otherwise it can leak | |
3101 | * during the lifetime of the relayd. | |
3102 | * | |
3103 | * This prevents situations in which streams can be | |
3104 | * left opened because an index was received, the | |
3105 | * control connection is closed, and the data | |
3106 | * connection is closed (uncleanly) before the packet's | |
3107 | * data provided. | |
3108 | * | |
3109 | * Since the data connection encountered an error, | |
3110 | * it is okay to be conservative and close the | |
3111 | * session right now as we can't rely on the protocol | |
3112 | * being respected anymore. | |
3113 | */ | |
3114 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
3115 | session_abort(data_conn->session); | |
3116 | } | |
7591bab1 | 3117 | relay_thread_close_connection(&events, pollfd, |
03e43155 | 3118 | data_conn); |
fd20dac9 MD |
3119 | /* |
3120 | * Every goto restart call sets the last seen fd where | |
3121 | * here we don't really care since we gracefully | |
3122 | * continue the loop after the connection is deleted. | |
3123 | */ | |
3124 | } else { | |
3125 | /* Keep last seen port. */ | |
3126 | last_seen_data_fd = pollfd; | |
7591bab1 | 3127 | connection_put(data_conn); |
fd20dac9 | 3128 | goto restart; |
b8aa1682 | 3129 | } |
03e43155 MD |
3130 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3131 | relay_thread_close_connection(&events, pollfd, | |
3132 | data_conn); | |
3133 | } else { | |
3134 | ERR("Unknown poll events %u for data sock %d", | |
3135 | revents, pollfd); | |
b8aa1682 | 3136 | } |
03e43155 | 3137 | put_data_connection: |
7591bab1 | 3138 | connection_put(data_conn); |
b8aa1682 | 3139 | } |
beaad64c | 3140 | last_seen_data_fd = -1; |
b8aa1682 JD |
3141 | } |
3142 | ||
f385ae0a MD |
3143 | /* Normal exit, no error */ |
3144 | ret = 0; | |
3145 | ||
095a4ae5 | 3146 | exit: |
b8aa1682 | 3147 | error: |
58eb9381 | 3148 | /* Cleanup reamaining connection object. */ |
9d1bbf21 | 3149 | rcu_read_lock(); |
90e7d72f JG |
3150 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, |
3151 | destroy_conn, | |
58eb9381 | 3152 | sock_n.node) { |
f385ae0a | 3153 | health_code_update(); |
06a68401 | 3154 | |
44a2fbf1 | 3155 | session_abort(destroy_conn->session); |
06a68401 | 3156 | |
7591bab1 MD |
3157 | /* |
3158 | * No need to grab another ref, because we own | |
3159 | * destroy_conn. | |
3160 | */ | |
3161 | relay_thread_close_connection(&events, destroy_conn->sock->fd, | |
3162 | destroy_conn); | |
b8aa1682 | 3163 | } |
94d49140 | 3164 | rcu_read_unlock(); |
7591bab1 MD |
3165 | |
3166 | lttng_poll_clean(&events); | |
7d2f7452 | 3167 | error_poll_create: |
b8aa1682 | 3168 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 3169 | relay_connections_ht_error: |
58eb9381 DG |
3170 | /* Close relay conn pipes */ |
3171 | utils_close_pipe(relay_conn_pipe); | |
095a4ae5 MD |
3172 | if (err) { |
3173 | DBG("Thread exited with error"); | |
3174 | } | |
b8aa1682 | 3175 | DBG("Worker thread cleanup complete"); |
9b5e0863 | 3176 | error_testpoint: |
f385ae0a MD |
3177 | if (err) { |
3178 | health_error(); | |
3179 | ERR("Health error occurred in %s", __func__); | |
3180 | } | |
3181 | health_unregister(health_relayd); | |
9d1bbf21 | 3182 | rcu_unregister_thread(); |
b4aacfdc | 3183 | lttng_relay_stop_threads(); |
b8aa1682 JD |
3184 | return NULL; |
3185 | } | |
3186 | ||
3187 | /* | |
3188 | * Create the relay command pipe to wake thread_manage_apps. | |
3189 | * Closed in cleanup(). | |
3190 | */ | |
58eb9381 | 3191 | static int create_relay_conn_pipe(void) |
b8aa1682 | 3192 | { |
a02de639 | 3193 | int ret; |
b8aa1682 | 3194 | |
58eb9381 | 3195 | ret = utils_create_pipe_cloexec(relay_conn_pipe); |
b8aa1682 | 3196 | |
b8aa1682 JD |
3197 | return ret; |
3198 | } | |
3199 | ||
3200 | /* | |
3201 | * main | |
3202 | */ | |
3203 | int main(int argc, char **argv) | |
3204 | { | |
178a0557 | 3205 | int ret = 0, retval = 0; |
b8aa1682 JD |
3206 | void *status; |
3207 | ||
c7cc870e JR |
3208 | /* Parse environment variables */ |
3209 | parse_env_options(); | |
3210 | ||
3211 | /* | |
3212 | * Parse arguments. | |
3213 | * Command line arguments overwrite environment. | |
3214 | */ | |
b8aa1682 | 3215 | progname = argv[0]; |
178a0557 MD |
3216 | if (set_options(argc, argv)) { |
3217 | retval = -1; | |
3218 | goto exit_options; | |
b8aa1682 JD |
3219 | } |
3220 | ||
178a0557 MD |
3221 | if (set_signal_handler()) { |
3222 | retval = -1; | |
3223 | goto exit_options; | |
b8aa1682 JD |
3224 | } |
3225 | ||
8ff7624a JR |
3226 | relayd_config_log(); |
3227 | ||
3228 | if (opt_print_version) { | |
3229 | print_version(); | |
3230 | retval = 0; | |
3231 | goto exit_options; | |
3232 | } | |
3233 | ||
4d513a50 DG |
3234 | /* Try to create directory if -o, --output is specified. */ |
3235 | if (opt_output_path) { | |
994fa64f DG |
3236 | if (*opt_output_path != '/') { |
3237 | ERR("Please specify an absolute path for -o, --output PATH"); | |
178a0557 MD |
3238 | retval = -1; |
3239 | goto exit_options; | |
994fa64f DG |
3240 | } |
3241 | ||
d77dded2 JG |
3242 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG, |
3243 | -1, -1); | |
4d513a50 DG |
3244 | if (ret < 0) { |
3245 | ERR("Unable to create %s", opt_output_path); | |
178a0557 MD |
3246 | retval = -1; |
3247 | goto exit_options; | |
4d513a50 DG |
3248 | } |
3249 | } | |
3250 | ||
b8aa1682 | 3251 | /* Daemonize */ |
b5218ffb | 3252 | if (opt_daemon || opt_background) { |
3fd27398 MD |
3253 | int i; |
3254 | ||
3255 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, | |
3256 | !opt_background); | |
b8aa1682 | 3257 | if (ret < 0) { |
178a0557 MD |
3258 | retval = -1; |
3259 | goto exit_options; | |
b8aa1682 | 3260 | } |
3fd27398 MD |
3261 | |
3262 | /* | |
3263 | * We are in the child. Make sure all other file | |
3264 | * descriptors are closed, in case we are called with | |
3265 | * more opened file descriptors than the standard ones. | |
3266 | */ | |
3267 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
3268 | (void) close(i); | |
3269 | } | |
3270 | } | |
3271 | ||
76375580 JR |
3272 | |
3273 | if (opt_working_directory) { | |
3274 | ret = utils_change_working_dir(opt_working_directory); | |
3275 | if (ret) { | |
3276 | ERR("Changing working directory"); | |
3277 | goto exit_options; | |
3278 | } | |
3279 | } | |
3280 | ||
178a0557 MD |
3281 | /* Initialize thread health monitoring */ |
3282 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
3283 | if (!health_relayd) { | |
3284 | PERROR("health_app_create error"); | |
3285 | retval = -1; | |
3286 | goto exit_health_app_create; | |
3287 | } | |
3288 | ||
3fd27398 | 3289 | /* Create thread quit pipe */ |
178a0557 MD |
3290 | if (init_thread_quit_pipe()) { |
3291 | retval = -1; | |
3292 | goto exit_init_data; | |
b8aa1682 JD |
3293 | } |
3294 | ||
b8aa1682 | 3295 | /* Setup the thread apps communication pipe. */ |
178a0557 MD |
3296 | if (create_relay_conn_pipe()) { |
3297 | retval = -1; | |
3298 | goto exit_init_data; | |
b8aa1682 JD |
3299 | } |
3300 | ||
3301 | /* Init relay command queue. */ | |
8bdee6e2 | 3302 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 | 3303 | |
554831e7 MD |
3304 | /* Initialize communication library */ |
3305 | lttcomm_init(); | |
87e45c13 | 3306 | lttcomm_inet_init(); |
554831e7 | 3307 | |
d3e2ba59 | 3308 | /* tables of sessions indexed by session ID */ |
7591bab1 MD |
3309 | sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3310 | if (!sessions_ht) { | |
178a0557 MD |
3311 | retval = -1; |
3312 | goto exit_init_data; | |
d3e2ba59 JD |
3313 | } |
3314 | ||
3315 | /* tables of streams indexed by stream ID */ | |
2a174661 | 3316 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 | 3317 | if (!relay_streams_ht) { |
178a0557 MD |
3318 | retval = -1; |
3319 | goto exit_init_data; | |
d3e2ba59 JD |
3320 | } |
3321 | ||
3322 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
3323 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3324 | if (!viewer_streams_ht) { | |
178a0557 MD |
3325 | retval = -1; |
3326 | goto exit_init_data; | |
55706a7d MD |
3327 | } |
3328 | ||
65931c8b | 3329 | ret = utils_create_pipe(health_quit_pipe); |
178a0557 MD |
3330 | if (ret) { |
3331 | retval = -1; | |
3332 | goto exit_health_quit_pipe; | |
65931c8b MD |
3333 | } |
3334 | ||
3335 | /* Create thread to manage the client socket */ | |
1a1a34b4 | 3336 | ret = pthread_create(&health_thread, default_pthread_attr(), |
65931c8b | 3337 | thread_manage_health, (void *) NULL); |
178a0557 MD |
3338 | if (ret) { |
3339 | errno = ret; | |
65931c8b | 3340 | PERROR("pthread_create health"); |
178a0557 MD |
3341 | retval = -1; |
3342 | goto exit_health_thread; | |
65931c8b MD |
3343 | } |
3344 | ||
b8aa1682 | 3345 | /* Setup the dispatcher thread */ |
1a1a34b4 | 3346 | ret = pthread_create(&dispatcher_thread, default_pthread_attr(), |
b8aa1682 | 3347 | relay_thread_dispatcher, (void *) NULL); |
178a0557 MD |
3348 | if (ret) { |
3349 | errno = ret; | |
b8aa1682 | 3350 | PERROR("pthread_create dispatcher"); |
178a0557 MD |
3351 | retval = -1; |
3352 | goto exit_dispatcher_thread; | |
b8aa1682 JD |
3353 | } |
3354 | ||
3355 | /* Setup the worker thread */ | |
1a1a34b4 | 3356 | ret = pthread_create(&worker_thread, default_pthread_attr(), |
7591bab1 | 3357 | relay_thread_worker, NULL); |
178a0557 MD |
3358 | if (ret) { |
3359 | errno = ret; | |
b8aa1682 | 3360 | PERROR("pthread_create worker"); |
178a0557 MD |
3361 | retval = -1; |
3362 | goto exit_worker_thread; | |
b8aa1682 JD |
3363 | } |
3364 | ||
3365 | /* Setup the listener thread */ | |
1a1a34b4 | 3366 | ret = pthread_create(&listener_thread, default_pthread_attr(), |
b8aa1682 | 3367 | relay_thread_listener, (void *) NULL); |
178a0557 MD |
3368 | if (ret) { |
3369 | errno = ret; | |
b8aa1682 | 3370 | PERROR("pthread_create listener"); |
178a0557 MD |
3371 | retval = -1; |
3372 | goto exit_listener_thread; | |
b8aa1682 JD |
3373 | } |
3374 | ||
7591bab1 | 3375 | ret = relayd_live_create(live_uri); |
178a0557 | 3376 | if (ret) { |
d3e2ba59 | 3377 | ERR("Starting live viewer threads"); |
178a0557 | 3378 | retval = -1; |
50138f51 | 3379 | goto exit_live; |
d3e2ba59 JD |
3380 | } |
3381 | ||
178a0557 MD |
3382 | /* |
3383 | * This is where we start awaiting program completion (e.g. through | |
3384 | * signal that asks threads to teardown). | |
3385 | */ | |
3386 | ||
3387 | ret = relayd_live_join(); | |
3388 | if (ret) { | |
3389 | retval = -1; | |
3390 | } | |
50138f51 | 3391 | exit_live: |
178a0557 | 3392 | |
b8aa1682 | 3393 | ret = pthread_join(listener_thread, &status); |
178a0557 MD |
3394 | if (ret) { |
3395 | errno = ret; | |
3396 | PERROR("pthread_join listener_thread"); | |
3397 | retval = -1; | |
b8aa1682 JD |
3398 | } |
3399 | ||
178a0557 | 3400 | exit_listener_thread: |
b8aa1682 | 3401 | ret = pthread_join(worker_thread, &status); |
178a0557 MD |
3402 | if (ret) { |
3403 | errno = ret; | |
3404 | PERROR("pthread_join worker_thread"); | |
3405 | retval = -1; | |
b8aa1682 JD |
3406 | } |
3407 | ||
178a0557 | 3408 | exit_worker_thread: |
b8aa1682 | 3409 | ret = pthread_join(dispatcher_thread, &status); |
178a0557 MD |
3410 | if (ret) { |
3411 | errno = ret; | |
3412 | PERROR("pthread_join dispatcher_thread"); | |
3413 | retval = -1; | |
b8aa1682 | 3414 | } |
178a0557 | 3415 | exit_dispatcher_thread: |
42415026 | 3416 | |
65931c8b | 3417 | ret = pthread_join(health_thread, &status); |
178a0557 MD |
3418 | if (ret) { |
3419 | errno = ret; | |
3420 | PERROR("pthread_join health_thread"); | |
3421 | retval = -1; | |
65931c8b | 3422 | } |
178a0557 | 3423 | exit_health_thread: |
65931c8b | 3424 | |
65931c8b | 3425 | utils_close_pipe(health_quit_pipe); |
178a0557 | 3426 | exit_health_quit_pipe: |
65931c8b | 3427 | |
178a0557 | 3428 | exit_init_data: |
55706a7d | 3429 | health_app_destroy(health_relayd); |
55706a7d | 3430 | exit_health_app_create: |
178a0557 | 3431 | exit_options: |
2668465a MD |
3432 | /* |
3433 | * Wait for all pending call_rcu work to complete before tearing | |
3434 | * down data structures. call_rcu worker may be trying to | |
3435 | * perform lookups in those structures. | |
3436 | */ | |
3437 | rcu_barrier(); | |
7591bab1 MD |
3438 | relayd_cleanup(); |
3439 | ||
3440 | /* Ensure all prior call_rcu are done. */ | |
3441 | rcu_barrier(); | |
d3e2ba59 | 3442 | |
178a0557 | 3443 | if (!retval) { |
b8aa1682 | 3444 | exit(EXIT_SUCCESS); |
178a0557 MD |
3445 | } else { |
3446 | exit(EXIT_FAILURE); | |
b8aa1682 | 3447 | } |
b8aa1682 | 3448 | } |