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> | |
70626904 | 40 | #include <urcu/rculist.h> |
b8aa1682 JD |
41 | #include <unistd.h> |
42 | #include <fcntl.h> | |
f8be1183 | 43 | #include <strings.h> |
b8aa1682 JD |
44 | |
45 | #include <lttng/lttng.h> | |
46 | #include <common/common.h> | |
47 | #include <common/compat/poll.h> | |
48 | #include <common/compat/socket.h> | |
f263b7fd | 49 | #include <common/compat/endian.h> |
e8fa9fb0 | 50 | #include <common/compat/getenv.h> |
b8aa1682 | 51 | #include <common/defaults.h> |
3fd27398 | 52 | #include <common/daemonize.h> |
b8aa1682 JD |
53 | #include <common/futex.h> |
54 | #include <common/sessiond-comm/sessiond-comm.h> | |
55 | #include <common/sessiond-comm/inet.h> | |
b8aa1682 JD |
56 | #include <common/sessiond-comm/relayd.h> |
57 | #include <common/uri.h> | |
a02de639 | 58 | #include <common/utils.h> |
d3ecc550 | 59 | #include <common/align.h> |
f40ef1d5 | 60 | #include <common/config/session-config.h> |
5312a3ed JG |
61 | #include <common/dynamic-buffer.h> |
62 | #include <common/buffer-view.h> | |
70626904 | 63 | #include <common/string-utils/format.h> |
b8aa1682 | 64 | |
a3bc3918 | 65 | #include "version.h" |
0f907de1 | 66 | #include "cmd.h" |
d3e2ba59 | 67 | #include "ctf-trace.h" |
1c20f0e2 | 68 | #include "index.h" |
0f907de1 | 69 | #include "utils.h" |
b8aa1682 | 70 | #include "lttng-relayd.h" |
d3e2ba59 | 71 | #include "live.h" |
55706a7d | 72 | #include "health-relayd.h" |
9b5e0863 | 73 | #include "testpoint.h" |
2f8f53af | 74 | #include "viewer-stream.h" |
2a174661 DG |
75 | #include "session.h" |
76 | #include "stream.h" | |
58eb9381 | 77 | #include "connection.h" |
a44ca2ca | 78 | #include "tracefile-array.h" |
f056029c | 79 | #include "tcp_keep_alive.h" |
23c8ff50 | 80 | #include "sessiond-trace-chunks.h" |
b8aa1682 | 81 | |
4fc83d94 PP |
82 | static const char *help_msg = |
83 | #ifdef LTTNG_EMBED_HELP | |
84 | #include <lttng-relayd.8.h> | |
85 | #else | |
86 | NULL | |
87 | #endif | |
88 | ; | |
89 | ||
5569b118 JG |
90 | enum relay_connection_status { |
91 | RELAY_CONNECTION_STATUS_OK, | |
a9577b76 | 92 | /* An error occurred while processing an event on the connection. */ |
5569b118 JG |
93 | RELAY_CONNECTION_STATUS_ERROR, |
94 | /* Connection closed/shutdown cleanly. */ | |
95 | RELAY_CONNECTION_STATUS_CLOSED, | |
96 | }; | |
97 | ||
b8aa1682 | 98 | /* command line options */ |
0f907de1 | 99 | char *opt_output_path; |
a3bc3918 | 100 | static int opt_daemon, opt_background, opt_print_version; |
3fd27398 MD |
101 | |
102 | /* | |
103 | * We need to wait for listener and live listener threads, as well as | |
104 | * health check thread, before being ready to signal readiness. | |
105 | */ | |
106 | #define NR_LTTNG_RELAY_READY 3 | |
107 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
0848dba7 MD |
108 | |
109 | /* Size of receive buffer. */ | |
110 | #define RECV_DATA_BUFFER_SIZE 65536 | |
111 | ||
3fd27398 MD |
112 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ |
113 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
114 | ||
095a4ae5 MD |
115 | static struct lttng_uri *control_uri; |
116 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 117 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
118 | |
119 | const char *progname; | |
b8aa1682 | 120 | |
65931c8b | 121 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
122 | static int tracing_group_name_override; |
123 | ||
124 | const char * const config_section_name = "relayd"; | |
65931c8b | 125 | |
b8aa1682 JD |
126 | /* |
127 | * Quit pipe for all threads. This permits a single cancellation point | |
128 | * for all threads when receiving an event on the pipe. | |
129 | */ | |
0b242f62 | 130 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
131 | |
132 | /* | |
133 | * This pipe is used to inform the worker thread that a command is queued and | |
134 | * ready to be processed. | |
135 | */ | |
58eb9381 | 136 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 137 | |
26c9d55e | 138 | /* Shared between threads */ |
b8aa1682 JD |
139 | static int dispatch_thread_exit; |
140 | ||
141 | static pthread_t listener_thread; | |
142 | static pthread_t dispatcher_thread; | |
143 | static pthread_t worker_thread; | |
65931c8b | 144 | static pthread_t health_thread; |
b8aa1682 | 145 | |
7591bab1 MD |
146 | /* |
147 | * last_relay_stream_id_lock protects last_relay_stream_id increment | |
148 | * atomicity on 32-bit architectures. | |
149 | */ | |
150 | static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER; | |
095a4ae5 | 151 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
152 | |
153 | /* | |
154 | * Relay command queue. | |
155 | * | |
156 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
157 | * queue. | |
158 | */ | |
58eb9381 | 159 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 | 160 | |
d3e2ba59 JD |
161 | /* Global relay stream hash table. */ |
162 | struct lttng_ht *relay_streams_ht; | |
163 | ||
92c6ca54 DG |
164 | /* Global relay viewer stream hash table. */ |
165 | struct lttng_ht *viewer_streams_ht; | |
166 | ||
7591bab1 MD |
167 | /* Global relay sessions hash table. */ |
168 | struct lttng_ht *sessions_ht; | |
0a6518b0 | 169 | |
55706a7d | 170 | /* Relayd health monitoring */ |
eea7556c | 171 | struct health_app *health_relayd; |
55706a7d | 172 | |
23c8ff50 JG |
173 | struct sessiond_trace_chunk_registry *sessiond_trace_chunk_registry; |
174 | ||
cd60b05a JG |
175 | static struct option long_options[] = { |
176 | { "control-port", 1, 0, 'C', }, | |
177 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 178 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 179 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 180 | { "background", 0, 0, 'b', }, |
cd60b05a JG |
181 | { "group", 1, 0, 'g', }, |
182 | { "help", 0, 0, 'h', }, | |
183 | { "output", 1, 0, 'o', }, | |
184 | { "verbose", 0, 0, 'v', }, | |
185 | { "config", 1, 0, 'f' }, | |
3a904098 | 186 | { "version", 0, 0, 'V' }, |
cd60b05a JG |
187 | { NULL, 0, 0, 0, }, |
188 | }; | |
189 | ||
3a904098 | 190 | static const char *config_ignore_options[] = { "help", "config", "version" }; |
cd60b05a | 191 | |
a3bc3918 JR |
192 | static void print_version(void) { |
193 | fprintf(stdout, "%s\n", VERSION); | |
194 | } | |
195 | ||
196 | static void relayd_config_log(void) | |
197 | { | |
198 | DBG("LTTng-relayd " VERSION " - " VERSION_NAME "%s%s", | |
199 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION, | |
200 | EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME); | |
201 | if (EXTRA_VERSION_DESCRIPTION[0] != '\0') { | |
202 | DBG("LTTng-relayd extra version description:\n\t" EXTRA_VERSION_DESCRIPTION "\n"); | |
203 | } | |
204 | } | |
205 | ||
cd60b05a JG |
206 | /* |
207 | * Take an option from the getopt output and set it in the right variable to be | |
208 | * used later. | |
209 | * | |
210 | * Return 0 on success else a negative value. | |
211 | */ | |
7591bab1 | 212 | static int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 213 | { |
cd60b05a JG |
214 | int ret; |
215 | ||
216 | switch (opt) { | |
217 | case 0: | |
218 | fprintf(stderr, "option %s", optname); | |
219 | if (arg) { | |
220 | fprintf(stderr, " with arg %s\n", arg); | |
221 | } | |
222 | break; | |
223 | case 'C': | |
e8fa9fb0 MD |
224 | if (lttng_is_setuid_setgid()) { |
225 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
226 | "-C, --control-port"); | |
227 | } else { | |
228 | ret = uri_parse(arg, &control_uri); | |
229 | if (ret < 0) { | |
230 | ERR("Invalid control URI specified"); | |
231 | goto end; | |
232 | } | |
233 | if (control_uri->port == 0) { | |
234 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
235 | } | |
cd60b05a JG |
236 | } |
237 | break; | |
238 | case 'D': | |
e8fa9fb0 MD |
239 | if (lttng_is_setuid_setgid()) { |
240 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
241 | "-D, -data-port"); | |
242 | } else { | |
243 | ret = uri_parse(arg, &data_uri); | |
244 | if (ret < 0) { | |
245 | ERR("Invalid data URI specified"); | |
246 | goto end; | |
247 | } | |
248 | if (data_uri->port == 0) { | |
249 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
250 | } | |
cd60b05a JG |
251 | } |
252 | break; | |
8d5c808e | 253 | case 'L': |
e8fa9fb0 MD |
254 | if (lttng_is_setuid_setgid()) { |
255 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
256 | "-L, -live-port"); | |
257 | } else { | |
258 | ret = uri_parse(arg, &live_uri); | |
259 | if (ret < 0) { | |
260 | ERR("Invalid live URI specified"); | |
261 | goto end; | |
262 | } | |
263 | if (live_uri->port == 0) { | |
264 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
265 | } | |
8d5c808e AM |
266 | } |
267 | break; | |
cd60b05a JG |
268 | case 'd': |
269 | opt_daemon = 1; | |
270 | break; | |
b5218ffb MD |
271 | case 'b': |
272 | opt_background = 1; | |
273 | break; | |
cd60b05a | 274 | case 'g': |
e8fa9fb0 MD |
275 | if (lttng_is_setuid_setgid()) { |
276 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
277 | "-g, --group"); | |
278 | } else { | |
279 | tracing_group_name = strdup(arg); | |
280 | if (tracing_group_name == NULL) { | |
281 | ret = -errno; | |
282 | PERROR("strdup"); | |
283 | goto end; | |
284 | } | |
285 | tracing_group_name_override = 1; | |
330a40bb | 286 | } |
cd60b05a JG |
287 | break; |
288 | case 'h': | |
4fc83d94 | 289 | ret = utils_show_help(8, "lttng-relayd", help_msg); |
655b5cc1 | 290 | if (ret) { |
4fc83d94 | 291 | ERR("Cannot show --help for `lttng-relayd`"); |
655b5cc1 PP |
292 | perror("exec"); |
293 | } | |
cd60b05a | 294 | exit(EXIT_FAILURE); |
3a904098 | 295 | case 'V': |
a3bc3918 JR |
296 | opt_print_version = 1; |
297 | break; | |
cd60b05a | 298 | case 'o': |
e8fa9fb0 MD |
299 | if (lttng_is_setuid_setgid()) { |
300 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
301 | "-o, --output"); | |
302 | } else { | |
303 | ret = asprintf(&opt_output_path, "%s", arg); | |
304 | if (ret < 0) { | |
305 | ret = -errno; | |
306 | PERROR("asprintf opt_output_path"); | |
307 | goto end; | |
308 | } | |
cd60b05a JG |
309 | } |
310 | break; | |
311 | case 'v': | |
312 | /* Verbose level can increase using multiple -v */ | |
313 | if (arg) { | |
314 | lttng_opt_verbose = config_parse_value(arg); | |
315 | } else { | |
849e5b7b DG |
316 | /* Only 3 level of verbosity (-vvv). */ |
317 | if (lttng_opt_verbose < 3) { | |
318 | lttng_opt_verbose += 1; | |
319 | } | |
cd60b05a JG |
320 | } |
321 | break; | |
322 | default: | |
323 | /* Unknown option or other error. | |
324 | * Error is printed by getopt, just return */ | |
325 | ret = -1; | |
326 | goto end; | |
327 | } | |
328 | ||
329 | /* All good. */ | |
330 | ret = 0; | |
331 | ||
332 | end: | |
333 | return ret; | |
334 | } | |
335 | ||
336 | /* | |
337 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 338 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
cd60b05a JG |
339 | * return value conventions. |
340 | */ | |
7591bab1 | 341 | static int config_entry_handler(const struct config_entry *entry, void *unused) |
cd60b05a JG |
342 | { |
343 | int ret = 0, i; | |
344 | ||
345 | if (!entry || !entry->name || !entry->value) { | |
346 | ret = -EINVAL; | |
347 | goto end; | |
348 | } | |
349 | ||
350 | /* Check if the option is to be ignored */ | |
351 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
352 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
353 | goto end; | |
354 | } | |
355 | } | |
356 | ||
357 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
358 | /* Ignore if entry name is not fully matched. */ | |
359 | if (strcmp(entry->name, long_options[i].name)) { | |
360 | continue; | |
361 | } | |
362 | ||
363 | /* | |
7591bab1 MD |
364 | * If the option takes no argument on the command line, |
365 | * we have to check if the value is "true". We support | |
366 | * non-zero numeric values, true, on and yes. | |
cd60b05a JG |
367 | */ |
368 | if (!long_options[i].has_arg) { | |
369 | ret = config_parse_value(entry->value); | |
370 | if (ret <= 0) { | |
371 | if (ret) { | |
372 | WARN("Invalid configuration value \"%s\" for option %s", | |
373 | entry->value, entry->name); | |
374 | } | |
375 | /* False, skip boolean config option. */ | |
376 | goto end; | |
377 | } | |
378 | } | |
379 | ||
380 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
381 | goto end; | |
382 | } | |
383 | ||
384 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
385 | entry->name); | |
386 | ||
387 | end: | |
388 | return ret; | |
389 | } | |
390 | ||
7591bab1 | 391 | static int set_options(int argc, char **argv) |
cd60b05a | 392 | { |
178a0557 | 393 | int c, ret = 0, option_index = 0, retval = 0; |
cd60b05a JG |
394 | int orig_optopt = optopt, orig_optind = optind; |
395 | char *default_address, *optstring; | |
396 | const char *config_path = NULL; | |
397 | ||
398 | optstring = utils_generate_optstring(long_options, | |
399 | sizeof(long_options) / sizeof(struct option)); | |
400 | if (!optstring) { | |
178a0557 | 401 | retval = -ENOMEM; |
cd60b05a JG |
402 | goto exit; |
403 | } | |
404 | ||
405 | /* Check for the --config option */ | |
406 | ||
407 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
408 | &option_index)) != -1) { | |
409 | if (c == '?') { | |
178a0557 | 410 | retval = -EINVAL; |
cd60b05a JG |
411 | goto exit; |
412 | } else if (c != 'f') { | |
413 | continue; | |
414 | } | |
415 | ||
e8fa9fb0 MD |
416 | if (lttng_is_setuid_setgid()) { |
417 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
418 | "-f, --config"); | |
419 | } else { | |
420 | config_path = utils_expand_path(optarg); | |
421 | if (!config_path) { | |
422 | ERR("Failed to resolve path: %s", optarg); | |
423 | } | |
cd60b05a JG |
424 | } |
425 | } | |
426 | ||
427 | ret = config_get_section_entries(config_path, config_section_name, | |
428 | config_entry_handler, NULL); | |
429 | if (ret) { | |
430 | if (ret > 0) { | |
431 | ERR("Invalid configuration option at line %i", ret); | |
cd60b05a | 432 | } |
178a0557 | 433 | retval = -1; |
cd60b05a JG |
434 | goto exit; |
435 | } | |
b8aa1682 | 436 | |
cd60b05a JG |
437 | /* Reset getopt's global state */ |
438 | optopt = orig_optopt; | |
439 | optind = orig_optind; | |
b8aa1682 | 440 | while (1) { |
cd60b05a | 441 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
442 | if (c == -1) { |
443 | break; | |
444 | } | |
445 | ||
cd60b05a JG |
446 | ret = set_option(c, optarg, long_options[option_index].name); |
447 | if (ret < 0) { | |
178a0557 | 448 | retval = -1; |
b8aa1682 JD |
449 | goto exit; |
450 | } | |
451 | } | |
452 | ||
453 | /* assign default values */ | |
454 | if (control_uri == NULL) { | |
fa91dc52 MD |
455 | ret = asprintf(&default_address, |
456 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
457 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
458 | if (ret < 0) { |
459 | PERROR("asprintf default data address"); | |
178a0557 | 460 | retval = -1; |
b8aa1682 JD |
461 | goto exit; |
462 | } | |
463 | ||
464 | ret = uri_parse(default_address, &control_uri); | |
465 | free(default_address); | |
466 | if (ret < 0) { | |
467 | ERR("Invalid control URI specified"); | |
178a0557 | 468 | retval = -1; |
b8aa1682 JD |
469 | goto exit; |
470 | } | |
471 | } | |
472 | if (data_uri == NULL) { | |
fa91dc52 MD |
473 | ret = asprintf(&default_address, |
474 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
475 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
476 | if (ret < 0) { |
477 | PERROR("asprintf default data address"); | |
178a0557 | 478 | retval = -1; |
b8aa1682 JD |
479 | goto exit; |
480 | } | |
481 | ||
482 | ret = uri_parse(default_address, &data_uri); | |
483 | free(default_address); | |
484 | if (ret < 0) { | |
485 | ERR("Invalid data URI specified"); | |
178a0557 | 486 | retval = -1; |
b8aa1682 JD |
487 | goto exit; |
488 | } | |
489 | } | |
d3e2ba59 | 490 | if (live_uri == NULL) { |
fa91dc52 MD |
491 | ret = asprintf(&default_address, |
492 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
493 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
494 | if (ret < 0) { |
495 | PERROR("asprintf default viewer control address"); | |
178a0557 | 496 | retval = -1; |
d3e2ba59 JD |
497 | goto exit; |
498 | } | |
499 | ||
500 | ret = uri_parse(default_address, &live_uri); | |
501 | free(default_address); | |
502 | if (ret < 0) { | |
503 | ERR("Invalid viewer control URI specified"); | |
178a0557 | 504 | retval = -1; |
d3e2ba59 JD |
505 | goto exit; |
506 | } | |
507 | } | |
b8aa1682 JD |
508 | |
509 | exit: | |
cd60b05a | 510 | free(optstring); |
178a0557 | 511 | return retval; |
b8aa1682 JD |
512 | } |
513 | ||
7591bab1 MD |
514 | static void print_global_objects(void) |
515 | { | |
516 | rcu_register_thread(); | |
517 | ||
518 | print_viewer_streams(); | |
519 | print_relay_streams(); | |
520 | print_sessions(); | |
521 | ||
522 | rcu_unregister_thread(); | |
523 | } | |
524 | ||
b8aa1682 JD |
525 | /* |
526 | * Cleanup the daemon | |
527 | */ | |
7591bab1 | 528 | static void relayd_cleanup(void) |
b8aa1682 | 529 | { |
7591bab1 MD |
530 | print_global_objects(); |
531 | ||
b8aa1682 JD |
532 | DBG("Cleaning up"); |
533 | ||
178a0557 MD |
534 | if (viewer_streams_ht) |
535 | lttng_ht_destroy(viewer_streams_ht); | |
536 | if (relay_streams_ht) | |
537 | lttng_ht_destroy(relay_streams_ht); | |
7591bab1 MD |
538 | if (sessions_ht) |
539 | lttng_ht_destroy(sessions_ht); | |
178a0557 | 540 | |
095a4ae5 MD |
541 | /* free the dynamically allocated opt_output_path */ |
542 | free(opt_output_path); | |
543 | ||
a02de639 CB |
544 | /* Close thread quit pipes */ |
545 | utils_close_pipe(thread_quit_pipe); | |
546 | ||
710c1f73 DG |
547 | uri_free(control_uri); |
548 | uri_free(data_uri); | |
8d5c808e | 549 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
550 | |
551 | if (tracing_group_name_override) { | |
552 | free((void *) tracing_group_name); | |
553 | } | |
b8aa1682 JD |
554 | } |
555 | ||
556 | /* | |
557 | * Write to writable pipe used to notify a thread. | |
558 | */ | |
7591bab1 | 559 | static int notify_thread_pipe(int wpipe) |
b8aa1682 | 560 | { |
6cd525e8 | 561 | ssize_t ret; |
b8aa1682 | 562 | |
6cd525e8 MD |
563 | ret = lttng_write(wpipe, "!", 1); |
564 | if (ret < 1) { | |
b8aa1682 | 565 | PERROR("write poll pipe"); |
b4aacfdc | 566 | goto end; |
b8aa1682 | 567 | } |
b4aacfdc MD |
568 | ret = 0; |
569 | end: | |
b8aa1682 JD |
570 | return ret; |
571 | } | |
572 | ||
7591bab1 | 573 | static int notify_health_quit_pipe(int *pipe) |
65931c8b | 574 | { |
6cd525e8 | 575 | ssize_t ret; |
65931c8b | 576 | |
6cd525e8 MD |
577 | ret = lttng_write(pipe[1], "4", 1); |
578 | if (ret < 1) { | |
65931c8b | 579 | PERROR("write relay health quit"); |
b4aacfdc | 580 | goto end; |
65931c8b | 581 | } |
b4aacfdc MD |
582 | ret = 0; |
583 | end: | |
584 | return ret; | |
65931c8b MD |
585 | } |
586 | ||
b8aa1682 | 587 | /* |
b4aacfdc | 588 | * Stop all relayd and relayd-live threads. |
b8aa1682 | 589 | */ |
b4aacfdc | 590 | int lttng_relay_stop_threads(void) |
b8aa1682 | 591 | { |
b4aacfdc | 592 | int retval = 0; |
b8aa1682 JD |
593 | |
594 | /* Stopping all threads */ | |
595 | DBG("Terminating all threads"); | |
b4aacfdc | 596 | if (notify_thread_pipe(thread_quit_pipe[1])) { |
b8aa1682 | 597 | ERR("write error on thread quit pipe"); |
b4aacfdc | 598 | retval = -1; |
b8aa1682 JD |
599 | } |
600 | ||
b4aacfdc MD |
601 | if (notify_health_quit_pipe(health_quit_pipe)) { |
602 | ERR("write error on health quit pipe"); | |
603 | } | |
65931c8b | 604 | |
b8aa1682 | 605 | /* Dispatch thread */ |
26c9d55e | 606 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 607 | futex_nto1_wake(&relay_conn_queue.futex); |
178a0557 | 608 | |
b4aacfdc | 609 | if (relayd_live_stop()) { |
178a0557 | 610 | ERR("Error stopping live threads"); |
b4aacfdc | 611 | retval = -1; |
178a0557 | 612 | } |
b4aacfdc | 613 | return retval; |
b8aa1682 JD |
614 | } |
615 | ||
616 | /* | |
617 | * Signal handler for the daemon | |
618 | * | |
619 | * Simply stop all worker threads, leaving main() return gracefully after | |
620 | * joining all threads and calling cleanup(). | |
621 | */ | |
7591bab1 | 622 | static void sighandler(int sig) |
b8aa1682 JD |
623 | { |
624 | switch (sig) { | |
b8aa1682 JD |
625 | case SIGINT: |
626 | DBG("SIGINT caught"); | |
b4aacfdc MD |
627 | if (lttng_relay_stop_threads()) { |
628 | ERR("Error stopping threads"); | |
629 | } | |
b8aa1682 JD |
630 | break; |
631 | case SIGTERM: | |
632 | DBG("SIGTERM caught"); | |
b4aacfdc MD |
633 | if (lttng_relay_stop_threads()) { |
634 | ERR("Error stopping threads"); | |
635 | } | |
b8aa1682 | 636 | break; |
3fd27398 MD |
637 | case SIGUSR1: |
638 | CMM_STORE_SHARED(recv_child_signal, 1); | |
639 | break; | |
b8aa1682 JD |
640 | default: |
641 | break; | |
642 | } | |
643 | } | |
644 | ||
645 | /* | |
646 | * Setup signal handler for : | |
647 | * SIGINT, SIGTERM, SIGPIPE | |
648 | */ | |
7591bab1 | 649 | static int set_signal_handler(void) |
b8aa1682 JD |
650 | { |
651 | int ret = 0; | |
652 | struct sigaction sa; | |
653 | sigset_t sigset; | |
654 | ||
655 | if ((ret = sigemptyset(&sigset)) < 0) { | |
656 | PERROR("sigemptyset"); | |
657 | return ret; | |
658 | } | |
659 | ||
b8aa1682 JD |
660 | sa.sa_mask = sigset; |
661 | sa.sa_flags = 0; | |
0072e5e2 MD |
662 | |
663 | sa.sa_handler = sighandler; | |
b8aa1682 JD |
664 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
665 | PERROR("sigaction"); | |
666 | return ret; | |
667 | } | |
668 | ||
669 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
670 | PERROR("sigaction"); | |
671 | return ret; | |
672 | } | |
673 | ||
0072e5e2 | 674 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
b8aa1682 JD |
675 | PERROR("sigaction"); |
676 | return ret; | |
677 | } | |
678 | ||
0072e5e2 MD |
679 | sa.sa_handler = SIG_IGN; |
680 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
3fd27398 MD |
681 | PERROR("sigaction"); |
682 | return ret; | |
683 | } | |
684 | ||
685 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
686 | |
687 | return ret; | |
688 | } | |
689 | ||
3fd27398 MD |
690 | void lttng_relay_notify_ready(void) |
691 | { | |
692 | /* Notify the parent of the fork() process that we are ready. */ | |
693 | if (opt_daemon || opt_background) { | |
694 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
695 | kill(child_ppid, SIGUSR1); | |
696 | } | |
697 | } | |
698 | } | |
699 | ||
b8aa1682 JD |
700 | /* |
701 | * Init thread quit pipe. | |
702 | * | |
703 | * Return -1 on error or 0 if all pipes are created. | |
704 | */ | |
7591bab1 | 705 | static int init_thread_quit_pipe(void) |
b8aa1682 | 706 | { |
a02de639 | 707 | int ret; |
b8aa1682 | 708 | |
a02de639 | 709 | ret = utils_create_pipe_cloexec(thread_quit_pipe); |
b8aa1682 | 710 | |
b8aa1682 JD |
711 | return ret; |
712 | } | |
713 | ||
714 | /* | |
715 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
716 | */ | |
7591bab1 | 717 | static int create_thread_poll_set(struct lttng_poll_event *events, int size) |
b8aa1682 JD |
718 | { |
719 | int ret; | |
720 | ||
721 | if (events == NULL || size == 0) { | |
722 | ret = -1; | |
723 | goto error; | |
724 | } | |
725 | ||
726 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
727 | if (ret < 0) { | |
728 | goto error; | |
729 | } | |
730 | ||
731 | /* Add quit pipe */ | |
c7759e6a | 732 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
733 | if (ret < 0) { |
734 | goto error; | |
735 | } | |
736 | ||
737 | return 0; | |
738 | ||
739 | error: | |
740 | return ret; | |
741 | } | |
742 | ||
743 | /* | |
744 | * Check if the thread quit pipe was triggered. | |
745 | * | |
746 | * Return 1 if it was triggered else 0; | |
747 | */ | |
7591bab1 | 748 | static int check_thread_quit_pipe(int fd, uint32_t events) |
b8aa1682 JD |
749 | { |
750 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
751 | return 1; | |
752 | } | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
757 | /* | |
758 | * Create and init socket from uri. | |
759 | */ | |
7591bab1 | 760 | static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri) |
b8aa1682 JD |
761 | { |
762 | int ret; | |
763 | struct lttcomm_sock *sock = NULL; | |
764 | ||
765 | sock = lttcomm_alloc_sock_from_uri(uri); | |
766 | if (sock == NULL) { | |
767 | ERR("Allocating socket"); | |
768 | goto error; | |
769 | } | |
770 | ||
771 | ret = lttcomm_create_sock(sock); | |
772 | if (ret < 0) { | |
773 | goto error; | |
774 | } | |
775 | DBG("Listening on sock %d", sock->fd); | |
776 | ||
777 | ret = sock->ops->bind(sock); | |
778 | if (ret < 0) { | |
2288467f | 779 | PERROR("Failed to bind socket"); |
b8aa1682 JD |
780 | goto error; |
781 | } | |
782 | ||
783 | ret = sock->ops->listen(sock, -1); | |
784 | if (ret < 0) { | |
785 | goto error; | |
786 | ||
787 | } | |
788 | ||
789 | return sock; | |
790 | ||
791 | error: | |
792 | if (sock) { | |
793 | lttcomm_destroy_sock(sock); | |
794 | } | |
795 | return NULL; | |
796 | } | |
797 | ||
798 | /* | |
799 | * This thread manages the listening for new connections on the network | |
800 | */ | |
7591bab1 | 801 | static void *relay_thread_listener(void *data) |
b8aa1682 | 802 | { |
095a4ae5 | 803 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
804 | uint32_t revents, nb_fd; |
805 | struct lttng_poll_event events; | |
806 | struct lttcomm_sock *control_sock, *data_sock; | |
807 | ||
b8aa1682 JD |
808 | DBG("[thread] Relay listener started"); |
809 | ||
55706a7d MD |
810 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
811 | ||
f385ae0a MD |
812 | health_code_update(); |
813 | ||
7591bab1 | 814 | control_sock = relay_socket_create(control_uri); |
b8aa1682 | 815 | if (!control_sock) { |
095a4ae5 | 816 | goto error_sock_control; |
b8aa1682 JD |
817 | } |
818 | ||
7591bab1 | 819 | data_sock = relay_socket_create(data_uri); |
b8aa1682 | 820 | if (!data_sock) { |
095a4ae5 | 821 | goto error_sock_relay; |
b8aa1682 JD |
822 | } |
823 | ||
824 | /* | |
7591bab1 MD |
825 | * Pass 3 as size here for the thread quit pipe, control and |
826 | * data socket. | |
b8aa1682 JD |
827 | */ |
828 | ret = create_thread_poll_set(&events, 3); | |
829 | if (ret < 0) { | |
830 | goto error_create_poll; | |
831 | } | |
832 | ||
833 | /* Add the control socket */ | |
834 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
835 | if (ret < 0) { | |
836 | goto error_poll_add; | |
837 | } | |
838 | ||
839 | /* Add the data socket */ | |
840 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
841 | if (ret < 0) { | |
842 | goto error_poll_add; | |
843 | } | |
844 | ||
3fd27398 MD |
845 | lttng_relay_notify_ready(); |
846 | ||
9b5e0863 MD |
847 | if (testpoint(relayd_thread_listener)) { |
848 | goto error_testpoint; | |
849 | } | |
850 | ||
b8aa1682 | 851 | while (1) { |
f385ae0a MD |
852 | health_code_update(); |
853 | ||
b8aa1682 JD |
854 | DBG("Listener accepting connections"); |
855 | ||
b8aa1682 | 856 | restart: |
f385ae0a | 857 | health_poll_entry(); |
b8aa1682 | 858 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 859 | health_poll_exit(); |
b8aa1682 JD |
860 | if (ret < 0) { |
861 | /* | |
862 | * Restart interrupted system call. | |
863 | */ | |
864 | if (errno == EINTR) { | |
865 | goto restart; | |
866 | } | |
867 | goto error; | |
868 | } | |
869 | ||
0d9c5d77 DG |
870 | nb_fd = ret; |
871 | ||
b8aa1682 JD |
872 | DBG("Relay new connection received"); |
873 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
874 | health_code_update(); |
875 | ||
b8aa1682 JD |
876 | /* Fetch once the poll data */ |
877 | revents = LTTNG_POLL_GETEV(&events, i); | |
878 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
879 | ||
880 | /* Thread quit pipe has been closed. Killing thread. */ | |
881 | ret = check_thread_quit_pipe(pollfd, revents); | |
882 | if (ret) { | |
095a4ae5 MD |
883 | err = 0; |
884 | goto exit; | |
b8aa1682 JD |
885 | } |
886 | ||
03e43155 | 887 | if (revents & LPOLLIN) { |
4b7f17b2 | 888 | /* |
7591bab1 MD |
889 | * A new connection is requested, therefore a |
890 | * sessiond/consumerd connection is allocated in | |
891 | * this thread, enqueued to a global queue and | |
892 | * dequeued (and freed) in the worker thread. | |
4b7f17b2 | 893 | */ |
58eb9381 DG |
894 | int val = 1; |
895 | struct relay_connection *new_conn; | |
4b7f17b2 | 896 | struct lttcomm_sock *newsock; |
7591bab1 | 897 | enum connection_type type; |
b8aa1682 JD |
898 | |
899 | if (pollfd == data_sock->fd) { | |
7591bab1 | 900 | type = RELAY_DATA; |
b8aa1682 | 901 | newsock = data_sock->ops->accept(data_sock); |
58eb9381 DG |
902 | DBG("Relay data connection accepted, socket %d", |
903 | newsock->fd); | |
4b7f17b2 MD |
904 | } else { |
905 | assert(pollfd == control_sock->fd); | |
7591bab1 | 906 | type = RELAY_CONTROL; |
b8aa1682 | 907 | newsock = control_sock->ops->accept(control_sock); |
58eb9381 DG |
908 | DBG("Relay control connection accepted, socket %d", |
909 | newsock->fd); | |
b8aa1682 | 910 | } |
58eb9381 DG |
911 | if (!newsock) { |
912 | PERROR("accepting sock"); | |
58eb9381 DG |
913 | goto error; |
914 | } | |
915 | ||
916 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
917 | sizeof(val)); | |
b8aa1682 JD |
918 | if (ret < 0) { |
919 | PERROR("setsockopt inet"); | |
4b7f17b2 | 920 | lttcomm_destroy_sock(newsock); |
b8aa1682 JD |
921 | goto error; |
922 | } | |
f056029c JR |
923 | |
924 | ret = socket_apply_keep_alive_config(newsock->fd); | |
925 | if (ret < 0) { | |
926 | ERR("Failed to apply TCP keep-alive configuration on socket (%i)", | |
927 | newsock->fd); | |
928 | lttcomm_destroy_sock(newsock); | |
929 | goto error; | |
930 | } | |
931 | ||
7591bab1 MD |
932 | new_conn = connection_create(newsock, type); |
933 | if (!new_conn) { | |
934 | lttcomm_destroy_sock(newsock); | |
935 | goto error; | |
936 | } | |
58eb9381 DG |
937 | |
938 | /* Enqueue request for the dispatcher thread. */ | |
8bdee6e2 SM |
939 | cds_wfcq_enqueue(&relay_conn_queue.head, &relay_conn_queue.tail, |
940 | &new_conn->qnode); | |
b8aa1682 JD |
941 | |
942 | /* | |
7591bab1 MD |
943 | * Wake the dispatch queue futex. |
944 | * Implicit memory barrier with the | |
945 | * exchange in cds_wfcq_enqueue. | |
b8aa1682 | 946 | */ |
58eb9381 | 947 | futex_nto1_wake(&relay_conn_queue.futex); |
03e43155 MD |
948 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
949 | ERR("socket poll error"); | |
950 | goto error; | |
951 | } else { | |
952 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
953 | goto error; | |
b8aa1682 JD |
954 | } |
955 | } | |
956 | } | |
957 | ||
095a4ae5 | 958 | exit: |
b8aa1682 JD |
959 | error: |
960 | error_poll_add: | |
9b5e0863 | 961 | error_testpoint: |
b8aa1682 JD |
962 | lttng_poll_clean(&events); |
963 | error_create_poll: | |
095a4ae5 MD |
964 | if (data_sock->fd >= 0) { |
965 | ret = data_sock->ops->close(data_sock); | |
b8aa1682 JD |
966 | if (ret) { |
967 | PERROR("close"); | |
968 | } | |
b8aa1682 | 969 | } |
095a4ae5 MD |
970 | lttcomm_destroy_sock(data_sock); |
971 | error_sock_relay: | |
972 | if (control_sock->fd >= 0) { | |
973 | ret = control_sock->ops->close(control_sock); | |
b8aa1682 JD |
974 | if (ret) { |
975 | PERROR("close"); | |
976 | } | |
b8aa1682 | 977 | } |
095a4ae5 MD |
978 | lttcomm_destroy_sock(control_sock); |
979 | error_sock_control: | |
980 | if (err) { | |
f385ae0a MD |
981 | health_error(); |
982 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 983 | } |
55706a7d | 984 | health_unregister(health_relayd); |
b8aa1682 | 985 | DBG("Relay listener thread cleanup complete"); |
b4aacfdc | 986 | lttng_relay_stop_threads(); |
b8aa1682 JD |
987 | return NULL; |
988 | } | |
989 | ||
990 | /* | |
991 | * This thread manages the dispatching of the requests to worker threads | |
992 | */ | |
7591bab1 | 993 | static void *relay_thread_dispatcher(void *data) |
b8aa1682 | 994 | { |
6cd525e8 MD |
995 | int err = -1; |
996 | ssize_t ret; | |
8bdee6e2 | 997 | struct cds_wfcq_node *node; |
58eb9381 | 998 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
999 | |
1000 | DBG("[thread] Relay dispatcher started"); | |
1001 | ||
55706a7d MD |
1002 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
1003 | ||
9b5e0863 MD |
1004 | if (testpoint(relayd_thread_dispatcher)) { |
1005 | goto error_testpoint; | |
1006 | } | |
1007 | ||
f385ae0a MD |
1008 | health_code_update(); |
1009 | ||
0ed3b1a8 | 1010 | for (;;) { |
f385ae0a MD |
1011 | health_code_update(); |
1012 | ||
b8aa1682 | 1013 | /* Atomically prepare the queue futex */ |
58eb9381 | 1014 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 | 1015 | |
0ed3b1a8 MD |
1016 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1017 | break; | |
1018 | } | |
1019 | ||
b8aa1682 | 1020 | do { |
f385ae0a MD |
1021 | health_code_update(); |
1022 | ||
b8aa1682 | 1023 | /* Dequeue commands */ |
8bdee6e2 SM |
1024 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
1025 | &relay_conn_queue.tail); | |
b8aa1682 JD |
1026 | if (node == NULL) { |
1027 | DBG("Woken up but nothing in the relay command queue"); | |
1028 | /* Continue thread execution */ | |
1029 | break; | |
1030 | } | |
58eb9381 | 1031 | new_conn = caa_container_of(node, struct relay_connection, qnode); |
b8aa1682 | 1032 | |
58eb9381 | 1033 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
1034 | |
1035 | /* | |
7591bab1 MD |
1036 | * Inform worker thread of the new request. This |
1037 | * call is blocking so we can be assured that | |
1038 | * the data will be read at some point in time | |
1039 | * or wait to the end of the world :) | |
b8aa1682 | 1040 | */ |
58eb9381 DG |
1041 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
1042 | if (ret < 0) { | |
1043 | PERROR("write connection pipe"); | |
7591bab1 | 1044 | connection_put(new_conn); |
b8aa1682 JD |
1045 | goto error; |
1046 | } | |
1047 | } while (node != NULL); | |
1048 | ||
1049 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 1050 | health_poll_entry(); |
58eb9381 | 1051 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 1052 | health_poll_exit(); |
b8aa1682 JD |
1053 | } |
1054 | ||
f385ae0a MD |
1055 | /* Normal exit, no error */ |
1056 | err = 0; | |
1057 | ||
b8aa1682 | 1058 | error: |
9b5e0863 | 1059 | error_testpoint: |
f385ae0a MD |
1060 | if (err) { |
1061 | health_error(); | |
1062 | ERR("Health error occurred in %s", __func__); | |
1063 | } | |
55706a7d | 1064 | health_unregister(health_relayd); |
b8aa1682 | 1065 | DBG("Dispatch thread dying"); |
b4aacfdc | 1066 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1067 | return NULL; |
1068 | } | |
1069 | ||
298a25ca JG |
1070 | static bool session_streams_have_index(const struct relay_session *session) |
1071 | { | |
1072 | return session->minor >= 4 && !session->snapshot; | |
1073 | } | |
1074 | ||
c5b6f4f0 DG |
1075 | /* |
1076 | * Handle the RELAYD_CREATE_SESSION command. | |
1077 | * | |
1078 | * On success, send back the session id or else return a negative value. | |
1079 | */ | |
5312a3ed JG |
1080 | static int relay_create_session(const struct lttcomm_relayd_hdr *recv_hdr, |
1081 | struct relay_connection *conn, | |
1082 | const struct lttng_buffer_view *payload) | |
c5b6f4f0 | 1083 | { |
5312a3ed JG |
1084 | int ret = 0; |
1085 | ssize_t send_ret; | |
4c6885d2 | 1086 | struct relay_session *session = NULL; |
ecd1a12f | 1087 | struct lttcomm_relayd_create_session_reply_2_11 reply = {}; |
1e791a74 JG |
1088 | char session_name[LTTNG_NAME_MAX] = {}; |
1089 | char hostname[LTTNG_HOST_NAME_MAX] = {}; | |
7591bab1 MD |
1090 | uint32_t live_timer = 0; |
1091 | bool snapshot = false; | |
46ef2188 | 1092 | bool session_name_contains_creation_timestamp = false; |
23c8ff50 | 1093 | /* Left nil for peers < 2.11. */ |
6fa5fe7c | 1094 | char base_path[LTTNG_PATH_MAX] = {}; |
23c8ff50 | 1095 | lttng_uuid sessiond_uuid = {}; |
1e791a74 JG |
1096 | LTTNG_OPTIONAL(uint64_t) id_sessiond = {}; |
1097 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; | |
db1da059 | 1098 | LTTNG_OPTIONAL(time_t) creation_time = {}; |
ecd1a12f MD |
1099 | struct lttng_dynamic_buffer reply_payload; |
1100 | ||
1101 | lttng_dynamic_buffer_init(&reply_payload); | |
c5b6f4f0 | 1102 | |
f86f6389 JR |
1103 | if (conn->minor < 4) { |
1104 | /* From 2.1 to 2.3 */ | |
1105 | ret = 0; | |
1106 | } else if (conn->minor >= 4 && conn->minor < 11) { | |
1107 | /* From 2.4 to 2.10 */ | |
5312a3ed | 1108 | ret = cmd_create_session_2_4(payload, session_name, |
7591bab1 | 1109 | hostname, &live_timer, &snapshot); |
f86f6389 | 1110 | } else { |
84fa4db5 | 1111 | bool has_current_chunk; |
db1da059 JG |
1112 | uint64_t current_chunk_id_value; |
1113 | time_t creation_time_value; | |
1114 | uint64_t id_sessiond_value; | |
84fa4db5 | 1115 | |
f86f6389 | 1116 | /* From 2.11 to ... */ |
db1da059 | 1117 | ret = cmd_create_session_2_11(payload, session_name, hostname, |
6fa5fe7c | 1118 | base_path, &live_timer, &snapshot, &id_sessiond_value, |
db1da059 | 1119 | sessiond_uuid, &has_current_chunk, |
46ef2188 MD |
1120 | ¤t_chunk_id_value, &creation_time_value, |
1121 | &session_name_contains_creation_timestamp); | |
23c8ff50 JG |
1122 | if (lttng_uuid_is_nil(sessiond_uuid)) { |
1123 | /* The nil UUID is reserved for pre-2.11 clients. */ | |
1124 | ERR("Illegal nil UUID announced by peer in create session command"); | |
1125 | ret = -1; | |
1126 | goto send_reply; | |
1127 | } | |
db1da059 JG |
1128 | LTTNG_OPTIONAL_SET(&id_sessiond, id_sessiond_value); |
1129 | LTTNG_OPTIONAL_SET(&creation_time, creation_time_value); | |
1130 | if (has_current_chunk) { | |
1131 | LTTNG_OPTIONAL_SET(¤t_chunk_id, | |
1132 | current_chunk_id_value); | |
1133 | } | |
7591bab1 | 1134 | } |
f86f6389 | 1135 | |
7591bab1 MD |
1136 | if (ret < 0) { |
1137 | goto send_reply; | |
d3e2ba59 JD |
1138 | } |
1139 | ||
6fa5fe7c | 1140 | session = session_create(session_name, hostname, base_path, live_timer, |
1e791a74 JG |
1141 | snapshot, sessiond_uuid, |
1142 | id_sessiond.is_set ? &id_sessiond.value : NULL, | |
1143 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, | |
db1da059 | 1144 | creation_time.is_set ? &creation_time.value : NULL, |
46ef2188 MD |
1145 | conn->major, conn->minor, |
1146 | session_name_contains_creation_timestamp); | |
7591bab1 MD |
1147 | if (!session) { |
1148 | ret = -1; | |
1149 | goto send_reply; | |
1150 | } | |
1151 | assert(!conn->session); | |
1152 | conn->session = session; | |
c5b6f4f0 DG |
1153 | DBG("Created session %" PRIu64, session->id); |
1154 | ||
ecd1a12f | 1155 | reply.generic.session_id = htobe64(session->id); |
7591bab1 MD |
1156 | |
1157 | send_reply: | |
c5b6f4f0 | 1158 | if (ret < 0) { |
ecd1a12f | 1159 | reply.generic.ret_code = htobe32(LTTNG_ERR_FATAL); |
c5b6f4f0 | 1160 | } else { |
ecd1a12f | 1161 | reply.generic.ret_code = htobe32(LTTNG_OK); |
c5b6f4f0 DG |
1162 | } |
1163 | ||
ecd1a12f MD |
1164 | if (conn->minor < 11) { |
1165 | /* From 2.1 to 2.10 */ | |
1166 | ret = lttng_dynamic_buffer_append(&reply_payload, | |
1167 | &reply.generic, sizeof(reply.generic)); | |
1168 | if (ret) { | |
1169 | ERR("Failed to append \"create session\" command reply header to payload buffer"); | |
1170 | ret = -1; | |
1171 | goto end; | |
1172 | } | |
1173 | } else { | |
1174 | const uint32_t output_path_length = | |
8d382dd4 | 1175 | session ? strlen(session->output_path) + 1 : 0; |
ecd1a12f MD |
1176 | |
1177 | reply.output_path_length = htobe32(output_path_length); | |
8d382dd4 JG |
1178 | ret = lttng_dynamic_buffer_append( |
1179 | &reply_payload, &reply, sizeof(reply)); | |
ecd1a12f MD |
1180 | if (ret) { |
1181 | ERR("Failed to append \"create session\" command reply header to payload buffer"); | |
1182 | goto end; | |
1183 | } | |
1184 | ||
8d382dd4 JG |
1185 | if (output_path_length) { |
1186 | ret = lttng_dynamic_buffer_append(&reply_payload, | |
1187 | session->output_path, | |
1188 | output_path_length); | |
1189 | if (ret) { | |
1190 | ERR("Failed to append \"create session\" command reply path to payload buffer"); | |
1191 | goto end; | |
1192 | } | |
ecd1a12f MD |
1193 | } |
1194 | } | |
1195 | ||
1196 | send_ret = conn->sock->ops->sendmsg(conn->sock, reply_payload.data, | |
1197 | reply_payload.size, 0); | |
1198 | if (send_ret < (ssize_t) reply_payload.size) { | |
1199 | ERR("Failed to send \"create session\" command reply of %zu bytes (ret = %zd)", | |
1200 | reply_payload.size, send_ret); | |
5312a3ed | 1201 | ret = -1; |
c5b6f4f0 | 1202 | } |
ecd1a12f | 1203 | end: |
4c6885d2 JG |
1204 | if (ret < 0 && session) { |
1205 | session_put(session); | |
1206 | } | |
ecd1a12f | 1207 | lttng_dynamic_buffer_reset(&reply_payload); |
c5b6f4f0 DG |
1208 | return ret; |
1209 | } | |
1210 | ||
a4baae1b JD |
1211 | /* |
1212 | * When we have received all the streams and the metadata for a channel, | |
1213 | * we make them visible to the viewer threads. | |
1214 | */ | |
7591bab1 | 1215 | static void publish_connection_local_streams(struct relay_connection *conn) |
a4baae1b | 1216 | { |
7591bab1 MD |
1217 | struct relay_stream *stream; |
1218 | struct relay_session *session = conn->session; | |
a4baae1b | 1219 | |
7591bab1 MD |
1220 | /* |
1221 | * We publish all streams belonging to a session atomically wrt | |
1222 | * session lock. | |
1223 | */ | |
1224 | pthread_mutex_lock(&session->lock); | |
1225 | rcu_read_lock(); | |
1226 | cds_list_for_each_entry_rcu(stream, &session->recv_list, | |
1227 | recv_node) { | |
1228 | stream_publish(stream); | |
a4baae1b | 1229 | } |
7591bab1 | 1230 | rcu_read_unlock(); |
a4baae1b | 1231 | |
7591bab1 MD |
1232 | /* |
1233 | * Inform the viewer that there are new streams in the session. | |
1234 | */ | |
1235 | if (session->viewer_attached) { | |
1236 | uatomic_set(&session->new_streams, 1); | |
1237 | } | |
1238 | pthread_mutex_unlock(&session->lock); | |
a4baae1b JD |
1239 | } |
1240 | ||
348a81dc JG |
1241 | static int conform_channel_path(char *channel_path) |
1242 | { | |
1243 | int ret = 0; | |
1244 | ||
1245 | if (strstr("../", channel_path)) { | |
1246 | ERR("Refusing channel path as it walks up the path hierarchy: \"%s\"", | |
1247 | channel_path); | |
1248 | ret = -1; | |
1249 | goto end; | |
1250 | } | |
1251 | ||
1252 | if (*channel_path == '/') { | |
1253 | const size_t len = strlen(channel_path); | |
1254 | ||
1255 | /* | |
1256 | * Channel paths from peers prior to 2.11 are expressed as an | |
1257 | * absolute path that is, in reality, relative to the relay | |
1258 | * daemon's output directory. Remove the leading slash so it | |
1259 | * is correctly interpreted as a relative path later on. | |
1260 | * | |
1261 | * len (and not len - 1) is used to copy the trailing NULL. | |
1262 | */ | |
1263 | bcopy(channel_path + 1, channel_path, len); | |
1264 | } | |
1265 | end: | |
1266 | return ret; | |
1267 | } | |
1268 | ||
b8aa1682 JD |
1269 | /* |
1270 | * relay_add_stream: allocate a new stream for a session | |
1271 | */ | |
5312a3ed JG |
1272 | static int relay_add_stream(const struct lttcomm_relayd_hdr *recv_hdr, |
1273 | struct relay_connection *conn, | |
1274 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1275 | { |
7591bab1 MD |
1276 | int ret; |
1277 | ssize_t send_ret; | |
58eb9381 | 1278 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1279 | struct relay_stream *stream = NULL; |
1280 | struct lttcomm_relayd_status_stream reply; | |
4030a636 | 1281 | struct ctf_trace *trace = NULL; |
7591bab1 MD |
1282 | uint64_t stream_handle = -1ULL; |
1283 | char *path_name = NULL, *channel_name = NULL; | |
1284 | uint64_t tracefile_size = 0, tracefile_count = 0; | |
348a81dc | 1285 | LTTNG_OPTIONAL(uint64_t) stream_chunk_id = {}; |
b8aa1682 | 1286 | |
5312a3ed | 1287 | if (!session || !conn->version_check_done) { |
b8aa1682 JD |
1288 | ERR("Trying to add a stream before version check"); |
1289 | ret = -1; | |
1290 | goto end_no_session; | |
1291 | } | |
1292 | ||
2f21a469 JR |
1293 | if (session->minor == 1) { |
1294 | /* For 2.1 */ | |
5312a3ed | 1295 | ret = cmd_recv_stream_2_1(payload, &path_name, |
7591bab1 | 1296 | &channel_name); |
2f21a469 JR |
1297 | } else if (session->minor > 1 && session->minor < 11) { |
1298 | /* From 2.2 to 2.10 */ | |
5312a3ed | 1299 | ret = cmd_recv_stream_2_2(payload, &path_name, |
7591bab1 | 1300 | &channel_name, &tracefile_size, &tracefile_count); |
2f21a469 JR |
1301 | } else { |
1302 | /* From 2.11 to ... */ | |
1303 | ret = cmd_recv_stream_2_11(payload, &path_name, | |
0b50e4b3 JG |
1304 | &channel_name, &tracefile_size, &tracefile_count, |
1305 | &stream_chunk_id.value); | |
1306 | stream_chunk_id.is_set = true; | |
0f907de1 | 1307 | } |
2f21a469 | 1308 | |
0f907de1 | 1309 | if (ret < 0) { |
7591bab1 | 1310 | goto send_reply; |
b8aa1682 JD |
1311 | } |
1312 | ||
348a81dc JG |
1313 | if (conform_channel_path(path_name)) { |
1314 | goto send_reply; | |
1315 | } | |
1316 | ||
7591bab1 | 1317 | trace = ctf_trace_get_by_path_or_create(session, path_name); |
2a174661 | 1318 | if (!trace) { |
7591bab1 | 1319 | goto send_reply; |
2a174661 | 1320 | } |
7591bab1 | 1321 | /* This stream here has one reference on the trace. */ |
2a174661 | 1322 | |
7591bab1 MD |
1323 | pthread_mutex_lock(&last_relay_stream_id_lock); |
1324 | stream_handle = ++last_relay_stream_id; | |
1325 | pthread_mutex_unlock(&last_relay_stream_id_lock); | |
d3e2ba59 | 1326 | |
7591bab1 MD |
1327 | /* We pass ownership of path_name and channel_name. */ |
1328 | stream = stream_create(trace, stream_handle, path_name, | |
348a81dc | 1329 | channel_name, tracefile_size, tracefile_count); |
7591bab1 MD |
1330 | path_name = NULL; |
1331 | channel_name = NULL; | |
a4baae1b | 1332 | |
2a174661 | 1333 | /* |
7591bab1 MD |
1334 | * Streams are the owners of their trace. Reference to trace is |
1335 | * kept within stream_create(). | |
2a174661 | 1336 | */ |
7591bab1 | 1337 | ctf_trace_put(trace); |
d3e2ba59 | 1338 | |
7591bab1 | 1339 | send_reply: |
53efb85a | 1340 | memset(&reply, 0, sizeof(reply)); |
7591bab1 MD |
1341 | reply.handle = htobe64(stream_handle); |
1342 | if (!stream) { | |
f73fabfd | 1343 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 1344 | } else { |
f73fabfd | 1345 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1346 | } |
5af40280 | 1347 | |
58eb9381 | 1348 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 | 1349 | sizeof(struct lttcomm_relayd_status_stream), 0); |
5312a3ed JG |
1350 | if (send_ret < (ssize_t) sizeof(reply)) { |
1351 | ERR("Failed to send \"add stream\" command reply (ret = %zd)", | |
1352 | send_ret); | |
1353 | ret = -1; | |
b8aa1682 JD |
1354 | } |
1355 | ||
1356 | end_no_session: | |
7591bab1 MD |
1357 | free(path_name); |
1358 | free(channel_name); | |
0f907de1 | 1359 | return ret; |
b8aa1682 JD |
1360 | } |
1361 | ||
173af62f DG |
1362 | /* |
1363 | * relay_close_stream: close a specific stream | |
1364 | */ | |
5312a3ed JG |
1365 | static int relay_close_stream(const struct lttcomm_relayd_hdr *recv_hdr, |
1366 | struct relay_connection *conn, | |
1367 | const struct lttng_buffer_view *payload) | |
173af62f | 1368 | { |
5312a3ed JG |
1369 | int ret; |
1370 | ssize_t send_ret; | |
58eb9381 | 1371 | struct relay_session *session = conn->session; |
173af62f DG |
1372 | struct lttcomm_relayd_close_stream stream_info; |
1373 | struct lttcomm_relayd_generic_reply reply; | |
1374 | struct relay_stream *stream; | |
173af62f DG |
1375 | |
1376 | DBG("Close stream received"); | |
1377 | ||
5312a3ed | 1378 | if (!session || !conn->version_check_done) { |
173af62f DG |
1379 | ERR("Trying to close a stream before version check"); |
1380 | ret = -1; | |
1381 | goto end_no_session; | |
1382 | } | |
1383 | ||
5312a3ed JG |
1384 | if (payload->size < sizeof(stream_info)) { |
1385 | ERR("Unexpected payload size in \"relay_close_stream\": expected >= %zu bytes, got %zu bytes", | |
1386 | sizeof(stream_info), payload->size); | |
173af62f DG |
1387 | ret = -1; |
1388 | goto end_no_session; | |
1389 | } | |
5312a3ed JG |
1390 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1391 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1392 | stream_info.last_net_seq_num = be64toh(stream_info.last_net_seq_num); | |
173af62f | 1393 | |
5312a3ed | 1394 | stream = stream_get_by_id(stream_info.stream_id); |
173af62f DG |
1395 | if (!stream) { |
1396 | ret = -1; | |
7591bab1 | 1397 | goto end; |
173af62f | 1398 | } |
77f7bd85 MD |
1399 | |
1400 | /* | |
1401 | * Set last_net_seq_num before the close flag. Required by data | |
1402 | * pending check. | |
1403 | */ | |
7591bab1 | 1404 | pthread_mutex_lock(&stream->lock); |
5312a3ed | 1405 | stream->last_net_seq_num = stream_info.last_net_seq_num; |
77f7bd85 MD |
1406 | pthread_mutex_unlock(&stream->lock); |
1407 | ||
bda7c7b9 JG |
1408 | /* |
1409 | * This is one of the conditions which may trigger a stream close | |
1410 | * with the others being: | |
1411 | * 1) A close command is received for a stream | |
1412 | * 2) The control connection owning the stream is closed | |
1413 | * 3) We have received all of the stream's data _after_ a close | |
1414 | * request. | |
1415 | */ | |
1416 | try_stream_close(stream); | |
7591bab1 MD |
1417 | if (stream->is_metadata) { |
1418 | struct relay_viewer_stream *vstream; | |
173af62f | 1419 | |
7591bab1 MD |
1420 | vstream = viewer_stream_get_by_id(stream->stream_handle); |
1421 | if (vstream) { | |
1422 | if (vstream->metadata_sent == stream->metadata_received) { | |
1423 | /* | |
1424 | * Since all the metadata has been sent to the | |
1425 | * viewer and that we have a request to close | |
1426 | * its stream, we can safely teardown the | |
1427 | * corresponding metadata viewer stream. | |
1428 | */ | |
1429 | viewer_stream_put(vstream); | |
1430 | } | |
1431 | /* Put local reference. */ | |
1432 | viewer_stream_put(vstream); | |
1433 | } | |
1434 | } | |
7591bab1 | 1435 | stream_put(stream); |
5312a3ed | 1436 | ret = 0; |
173af62f | 1437 | |
7591bab1 | 1438 | end: |
53efb85a | 1439 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1440 | if (ret < 0) { |
f73fabfd | 1441 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1442 | } else { |
f73fabfd | 1443 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1444 | } |
58eb9381 | 1445 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f | 1446 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
5312a3ed JG |
1447 | if (send_ret < (ssize_t) sizeof(reply)) { |
1448 | ERR("Failed to send \"close stream\" command reply (ret = %zd)", | |
1449 | send_ret); | |
1450 | ret = -1; | |
173af62f DG |
1451 | } |
1452 | ||
1453 | end_no_session: | |
1454 | return ret; | |
1455 | } | |
1456 | ||
93ec662e JD |
1457 | /* |
1458 | * relay_reset_metadata: reset a metadata stream | |
1459 | */ | |
1460 | static | |
5312a3ed JG |
1461 | int relay_reset_metadata(const struct lttcomm_relayd_hdr *recv_hdr, |
1462 | struct relay_connection *conn, | |
1463 | const struct lttng_buffer_view *payload) | |
93ec662e | 1464 | { |
5312a3ed JG |
1465 | int ret; |
1466 | ssize_t send_ret; | |
93ec662e JD |
1467 | struct relay_session *session = conn->session; |
1468 | struct lttcomm_relayd_reset_metadata stream_info; | |
1469 | struct lttcomm_relayd_generic_reply reply; | |
1470 | struct relay_stream *stream; | |
1471 | ||
1472 | DBG("Reset metadata received"); | |
1473 | ||
5312a3ed | 1474 | if (!session || !conn->version_check_done) { |
93ec662e JD |
1475 | ERR("Trying to reset a metadata stream before version check"); |
1476 | ret = -1; | |
1477 | goto end_no_session; | |
1478 | } | |
1479 | ||
5312a3ed JG |
1480 | if (payload->size < sizeof(stream_info)) { |
1481 | ERR("Unexpected payload size in \"relay_reset_metadata\": expected >= %zu bytes, got %zu bytes", | |
1482 | sizeof(stream_info), payload->size); | |
93ec662e JD |
1483 | ret = -1; |
1484 | goto end_no_session; | |
1485 | } | |
5312a3ed JG |
1486 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1487 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1488 | stream_info.version = be64toh(stream_info.version); | |
1489 | ||
1490 | DBG("Update metadata to version %" PRIu64, stream_info.version); | |
93ec662e JD |
1491 | |
1492 | /* Unsupported for live sessions for now. */ | |
1493 | if (session->live_timer != 0) { | |
1494 | ret = -1; | |
1495 | goto end; | |
1496 | } | |
1497 | ||
5312a3ed | 1498 | stream = stream_get_by_id(stream_info.stream_id); |
93ec662e JD |
1499 | if (!stream) { |
1500 | ret = -1; | |
1501 | goto end; | |
1502 | } | |
1503 | pthread_mutex_lock(&stream->lock); | |
1504 | if (!stream->is_metadata) { | |
1505 | ret = -1; | |
1506 | goto end_unlock; | |
1507 | } | |
1508 | ||
c35f9726 | 1509 | ret = stream_reset_file(stream); |
93ec662e | 1510 | if (ret < 0) { |
c35f9726 JG |
1511 | ERR("Failed to reset metadata stream %" PRIu64 |
1512 | ": stream_path = %s, channel = %s", | |
1513 | stream->stream_handle, stream->path_name, | |
1514 | stream->channel_name); | |
93ec662e JD |
1515 | goto end_unlock; |
1516 | } | |
93ec662e JD |
1517 | end_unlock: |
1518 | pthread_mutex_unlock(&stream->lock); | |
1519 | stream_put(stream); | |
1520 | ||
1521 | end: | |
1522 | memset(&reply, 0, sizeof(reply)); | |
1523 | if (ret < 0) { | |
1524 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1525 | } else { | |
1526 | reply.ret_code = htobe32(LTTNG_OK); | |
1527 | } | |
1528 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1529 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed JG |
1530 | if (send_ret < (ssize_t) sizeof(reply)) { |
1531 | ERR("Failed to send \"reset metadata\" command reply (ret = %zd)", | |
1532 | send_ret); | |
1533 | ret = -1; | |
93ec662e JD |
1534 | } |
1535 | ||
1536 | end_no_session: | |
1537 | return ret; | |
1538 | } | |
1539 | ||
b8aa1682 JD |
1540 | /* |
1541 | * relay_unknown_command: send -1 if received unknown command | |
1542 | */ | |
7591bab1 | 1543 | static void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1544 | { |
1545 | struct lttcomm_relayd_generic_reply reply; | |
5312a3ed | 1546 | ssize_t send_ret; |
b8aa1682 | 1547 | |
53efb85a | 1548 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1549 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5312a3ed JG |
1550 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1551 | if (send_ret < sizeof(reply)) { | |
1552 | ERR("Failed to send \"unknown command\" command reply (ret = %zd)", send_ret); | |
b8aa1682 JD |
1553 | } |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | * relay_start: send an acknowledgment to the client to tell if we are | |
1558 | * ready to receive data. We are ready if a session is established. | |
1559 | */ | |
5312a3ed JG |
1560 | static int relay_start(const struct lttcomm_relayd_hdr *recv_hdr, |
1561 | struct relay_connection *conn, | |
1562 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1563 | { |
5312a3ed JG |
1564 | int ret = 0; |
1565 | ssize_t send_ret; | |
b8aa1682 | 1566 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1567 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1568 | |
1569 | if (!session) { | |
1570 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1571 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1572 | } |
1573 | ||
53efb85a | 1574 | memset(&reply, 0, sizeof(reply)); |
5312a3ed JG |
1575 | reply.ret_code = htobe32(LTTNG_OK); |
1576 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1577 | sizeof(reply), 0); | |
1578 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1579 | ERR("Failed to send \"relay_start\" command reply (ret = %zd)", | |
1580 | send_ret); | |
1581 | ret = -1; | |
b8aa1682 JD |
1582 | } |
1583 | ||
1584 | return ret; | |
1585 | } | |
1586 | ||
b8aa1682 | 1587 | /* |
7591bab1 | 1588 | * relay_recv_metadata: receive the metadata for the session. |
b8aa1682 | 1589 | */ |
5312a3ed JG |
1590 | static int relay_recv_metadata(const struct lttcomm_relayd_hdr *recv_hdr, |
1591 | struct relay_connection *conn, | |
1592 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1593 | { |
32d1569c | 1594 | int ret = 0; |
58eb9381 | 1595 | struct relay_session *session = conn->session; |
5312a3ed | 1596 | struct lttcomm_relayd_metadata_payload metadata_payload_header; |
b8aa1682 | 1597 | struct relay_stream *metadata_stream; |
5312a3ed | 1598 | uint64_t metadata_payload_size; |
c35f9726 | 1599 | struct lttng_buffer_view packet_view; |
b8aa1682 JD |
1600 | |
1601 | if (!session) { | |
1602 | ERR("Metadata sent before version check"); | |
1603 | ret = -1; | |
1604 | goto end; | |
1605 | } | |
1606 | ||
5312a3ed | 1607 | if (recv_hdr->data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { |
f6416125 MD |
1608 | ERR("Incorrect data size"); |
1609 | ret = -1; | |
1610 | goto end; | |
1611 | } | |
5312a3ed JG |
1612 | metadata_payload_size = recv_hdr->data_size - |
1613 | sizeof(struct lttcomm_relayd_metadata_payload); | |
f6416125 | 1614 | |
5312a3ed JG |
1615 | memcpy(&metadata_payload_header, payload->data, |
1616 | sizeof(metadata_payload_header)); | |
1617 | metadata_payload_header.stream_id = be64toh( | |
1618 | metadata_payload_header.stream_id); | |
1619 | metadata_payload_header.padding_size = be32toh( | |
1620 | metadata_payload_header.padding_size); | |
9d1bbf21 | 1621 | |
5312a3ed | 1622 | metadata_stream = stream_get_by_id(metadata_payload_header.stream_id); |
b8aa1682 JD |
1623 | if (!metadata_stream) { |
1624 | ret = -1; | |
7591bab1 | 1625 | goto end; |
b8aa1682 JD |
1626 | } |
1627 | ||
c35f9726 JG |
1628 | packet_view = lttng_buffer_view_from_view(payload, |
1629 | sizeof(metadata_payload_header), metadata_payload_size); | |
1630 | if (!packet_view.data) { | |
1631 | ERR("Invalid metadata packet length announced by header"); | |
b8aa1682 | 1632 | ret = -1; |
7591bab1 | 1633 | goto end_put; |
b8aa1682 | 1634 | } |
1d4dfdef | 1635 | |
c35f9726 JG |
1636 | pthread_mutex_lock(&metadata_stream->lock); |
1637 | ret = stream_write(metadata_stream, &packet_view, | |
5312a3ed | 1638 | metadata_payload_header.padding_size); |
c35f9726 JG |
1639 | pthread_mutex_unlock(&metadata_stream->lock); |
1640 | if (ret){ | |
5312a3ed | 1641 | ret = -1; |
7591bab1 | 1642 | goto end_put; |
1d4dfdef | 1643 | } |
7591bab1 | 1644 | end_put: |
7591bab1 | 1645 | stream_put(metadata_stream); |
b8aa1682 JD |
1646 | end: |
1647 | return ret; | |
1648 | } | |
1649 | ||
1650 | /* | |
1651 | * relay_send_version: send relayd version number | |
1652 | */ | |
5312a3ed JG |
1653 | static int relay_send_version(const struct lttcomm_relayd_hdr *recv_hdr, |
1654 | struct relay_connection *conn, | |
1655 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1656 | { |
7f51dcba | 1657 | int ret; |
5312a3ed | 1658 | ssize_t send_ret; |
092b6259 | 1659 | struct lttcomm_relayd_version reply, msg; |
87cb6359 | 1660 | bool compatible = true; |
b8aa1682 | 1661 | |
5312a3ed | 1662 | conn->version_check_done = true; |
b8aa1682 | 1663 | |
092b6259 | 1664 | /* Get version from the other side. */ |
5312a3ed JG |
1665 | if (payload->size < sizeof(msg)) { |
1666 | ERR("Unexpected payload size in \"relay_send_version\": expected >= %zu bytes, got %zu bytes", | |
1667 | sizeof(msg), payload->size); | |
092b6259 | 1668 | ret = -1; |
092b6259 DG |
1669 | goto end; |
1670 | } | |
1671 | ||
5312a3ed JG |
1672 | memcpy(&msg, payload->data, sizeof(msg)); |
1673 | msg.major = be32toh(msg.major); | |
1674 | msg.minor = be32toh(msg.minor); | |
1675 | ||
53efb85a | 1676 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
1677 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1678 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1679 | |
1680 | /* Major versions must be the same */ | |
5312a3ed | 1681 | if (reply.major != msg.major) { |
6151a90f | 1682 | DBG("Incompatible major versions (%u vs %u), deleting session", |
5312a3ed | 1683 | reply.major, msg.major); |
87cb6359 | 1684 | compatible = false; |
d4519fa3 JD |
1685 | } |
1686 | ||
58eb9381 | 1687 | conn->major = reply.major; |
0f907de1 | 1688 | /* We adapt to the lowest compatible version */ |
5312a3ed | 1689 | if (reply.minor <= msg.minor) { |
58eb9381 | 1690 | conn->minor = reply.minor; |
0f907de1 | 1691 | } else { |
5312a3ed | 1692 | conn->minor = msg.minor; |
0f907de1 JD |
1693 | } |
1694 | ||
6151a90f JD |
1695 | reply.major = htobe32(reply.major); |
1696 | reply.minor = htobe32(reply.minor); | |
5312a3ed JG |
1697 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
1698 | sizeof(reply), 0); | |
1699 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1700 | ERR("Failed to send \"send version\" command reply (ret = %zd)", | |
1701 | send_ret); | |
1702 | ret = -1; | |
1703 | goto end; | |
1704 | } else { | |
1705 | ret = 0; | |
6151a90f JD |
1706 | } |
1707 | ||
87cb6359 JD |
1708 | if (!compatible) { |
1709 | ret = -1; | |
1710 | goto end; | |
1711 | } | |
1712 | ||
58eb9381 DG |
1713 | DBG("Version check done using protocol %u.%u", conn->major, |
1714 | conn->minor); | |
b8aa1682 JD |
1715 | |
1716 | end: | |
1717 | return ret; | |
1718 | } | |
1719 | ||
c8f59ee5 | 1720 | /* |
6d805429 | 1721 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 | 1722 | */ |
5312a3ed JG |
1723 | static int relay_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
1724 | struct relay_connection *conn, | |
1725 | const struct lttng_buffer_view *payload) | |
c8f59ee5 | 1726 | { |
58eb9381 | 1727 | struct relay_session *session = conn->session; |
6d805429 | 1728 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
1729 | struct lttcomm_relayd_generic_reply reply; |
1730 | struct relay_stream *stream; | |
5312a3ed | 1731 | ssize_t send_ret; |
c8f59ee5 | 1732 | int ret; |
298a25ca | 1733 | uint64_t stream_seq; |
c8f59ee5 | 1734 | |
6d805429 | 1735 | DBG("Data pending command received"); |
c8f59ee5 | 1736 | |
5312a3ed | 1737 | if (!session || !conn->version_check_done) { |
c8f59ee5 DG |
1738 | ERR("Trying to check for data before version check"); |
1739 | ret = -1; | |
1740 | goto end_no_session; | |
1741 | } | |
1742 | ||
5312a3ed JG |
1743 | if (payload->size < sizeof(msg)) { |
1744 | ERR("Unexpected payload size in \"relay_data_pending\": expected >= %zu bytes, got %zu bytes", | |
1745 | sizeof(msg), payload->size); | |
c8f59ee5 DG |
1746 | ret = -1; |
1747 | goto end_no_session; | |
1748 | } | |
5312a3ed JG |
1749 | memcpy(&msg, payload->data, sizeof(msg)); |
1750 | msg.stream_id = be64toh(msg.stream_id); | |
1751 | msg.last_net_seq_num = be64toh(msg.last_net_seq_num); | |
c8f59ee5 | 1752 | |
5312a3ed | 1753 | stream = stream_get_by_id(msg.stream_id); |
de91f48a | 1754 | if (stream == NULL) { |
c8f59ee5 | 1755 | ret = -1; |
7591bab1 | 1756 | goto end; |
c8f59ee5 DG |
1757 | } |
1758 | ||
7591bab1 MD |
1759 | pthread_mutex_lock(&stream->lock); |
1760 | ||
298a25ca JG |
1761 | if (session_streams_have_index(session)) { |
1762 | /* | |
1763 | * Ensure that both the index and stream data have been | |
1764 | * flushed up to the requested point. | |
1765 | */ | |
a8f9f353 | 1766 | stream_seq = min(stream->prev_data_seq, stream->prev_index_seq); |
298a25ca | 1767 | } else { |
a8f9f353 | 1768 | stream_seq = stream->prev_data_seq; |
298a25ca | 1769 | } |
a8f9f353 | 1770 | DBG("Data pending for stream id %" PRIu64 ": prev_data_seq %" PRIu64 |
298a25ca JG |
1771 | ", prev_index_seq %" PRIu64 |
1772 | ", and last_seq %" PRIu64, msg.stream_id, | |
a8f9f353 | 1773 | stream->prev_data_seq, stream->prev_index_seq, |
298a25ca | 1774 | msg.last_net_seq_num); |
c8f59ee5 | 1775 | |
33832e64 | 1776 | /* Avoid wrapping issue */ |
298a25ca | 1777 | if (((int64_t) (stream_seq - msg.last_net_seq_num)) >= 0) { |
6d805429 | 1778 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 1779 | ret = 0; |
6d805429 DG |
1780 | } else { |
1781 | /* Data still being streamed thus pending */ | |
1782 | ret = 1; | |
c8f59ee5 DG |
1783 | } |
1784 | ||
7591bab1 MD |
1785 | stream->data_pending_check_done = true; |
1786 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 1787 | |
7591bab1 MD |
1788 | stream_put(stream); |
1789 | end: | |
c8f59ee5 | 1790 | |
53efb85a | 1791 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1792 | reply.ret_code = htobe32(ret); |
5312a3ed JG |
1793 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1794 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1795 | ERR("Failed to send \"data pending\" command reply (ret = %zd)", | |
1796 | send_ret); | |
1797 | ret = -1; | |
c8f59ee5 DG |
1798 | } |
1799 | ||
1800 | end_no_session: | |
1801 | return ret; | |
1802 | } | |
1803 | ||
1804 | /* | |
1805 | * Wait for the control socket to reach a quiescent state. | |
1806 | * | |
7591bab1 MD |
1807 | * Note that for now, when receiving this command from the session |
1808 | * daemon, this means that every subsequent commands or data received on | |
1809 | * the control socket has been handled. So, this is why we simply return | |
1810 | * OK here. | |
c8f59ee5 | 1811 | */ |
5312a3ed JG |
1812 | static int relay_quiescent_control(const struct lttcomm_relayd_hdr *recv_hdr, |
1813 | struct relay_connection *conn, | |
1814 | const struct lttng_buffer_view *payload) | |
c8f59ee5 DG |
1815 | { |
1816 | int ret; | |
5312a3ed | 1817 | ssize_t send_ret; |
ad7051c0 | 1818 | struct relay_stream *stream; |
ad7051c0 | 1819 | struct lttcomm_relayd_quiescent_control msg; |
c8f59ee5 DG |
1820 | struct lttcomm_relayd_generic_reply reply; |
1821 | ||
1822 | DBG("Checking quiescent state on control socket"); | |
1823 | ||
5312a3ed | 1824 | if (!conn->session || !conn->version_check_done) { |
ad7051c0 DG |
1825 | ERR("Trying to check for data before version check"); |
1826 | ret = -1; | |
1827 | goto end_no_session; | |
1828 | } | |
1829 | ||
5312a3ed JG |
1830 | if (payload->size < sizeof(msg)) { |
1831 | ERR("Unexpected payload size in \"relay_quiescent_control\": expected >= %zu bytes, got %zu bytes", | |
1832 | sizeof(msg), payload->size); | |
ad7051c0 DG |
1833 | ret = -1; |
1834 | goto end_no_session; | |
1835 | } | |
5312a3ed JG |
1836 | memcpy(&msg, payload->data, sizeof(msg)); |
1837 | msg.stream_id = be64toh(msg.stream_id); | |
ad7051c0 | 1838 | |
5312a3ed | 1839 | stream = stream_get_by_id(msg.stream_id); |
7591bab1 MD |
1840 | if (!stream) { |
1841 | goto reply; | |
1842 | } | |
1843 | pthread_mutex_lock(&stream->lock); | |
1844 | stream->data_pending_check_done = true; | |
1845 | pthread_mutex_unlock(&stream->lock); | |
5312a3ed JG |
1846 | |
1847 | DBG("Relay quiescent control pending flag set to %" PRIu64, msg.stream_id); | |
7591bab1 MD |
1848 | stream_put(stream); |
1849 | reply: | |
53efb85a | 1850 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 1851 | reply.ret_code = htobe32(LTTNG_OK); |
5312a3ed JG |
1852 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1853 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1854 | ERR("Failed to send \"quiescent control\" command reply (ret = %zd)", | |
1855 | send_ret); | |
1856 | ret = -1; | |
1857 | } else { | |
1858 | ret = 0; | |
c8f59ee5 DG |
1859 | } |
1860 | ||
ad7051c0 | 1861 | end_no_session: |
c8f59ee5 DG |
1862 | return ret; |
1863 | } | |
1864 | ||
f7079f67 | 1865 | /* |
7591bab1 MD |
1866 | * Initialize a data pending command. This means that a consumer is about |
1867 | * to ask for data pending for each stream it holds. Simply iterate over | |
1868 | * all streams of a session and set the data_pending_check_done flag. | |
f7079f67 DG |
1869 | * |
1870 | * This command returns to the client a LTTNG_OK code. | |
1871 | */ | |
5312a3ed JG |
1872 | static int relay_begin_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
1873 | struct relay_connection *conn, | |
1874 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
1875 | { |
1876 | int ret; | |
5312a3ed | 1877 | ssize_t send_ret; |
f7079f67 DG |
1878 | struct lttng_ht_iter iter; |
1879 | struct lttcomm_relayd_begin_data_pending msg; | |
1880 | struct lttcomm_relayd_generic_reply reply; | |
1881 | struct relay_stream *stream; | |
f7079f67 DG |
1882 | |
1883 | assert(recv_hdr); | |
58eb9381 | 1884 | assert(conn); |
f7079f67 DG |
1885 | |
1886 | DBG("Init streams for data pending"); | |
1887 | ||
5312a3ed | 1888 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
1889 | ERR("Trying to check for data before version check"); |
1890 | ret = -1; | |
1891 | goto end_no_session; | |
1892 | } | |
1893 | ||
5312a3ed JG |
1894 | if (payload->size < sizeof(msg)) { |
1895 | ERR("Unexpected payload size in \"relay_begin_data_pending\": expected >= %zu bytes, got %zu bytes", | |
1896 | sizeof(msg), payload->size); | |
f7079f67 DG |
1897 | ret = -1; |
1898 | goto end_no_session; | |
1899 | } | |
5312a3ed JG |
1900 | memcpy(&msg, payload->data, sizeof(msg)); |
1901 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 DG |
1902 | |
1903 | /* | |
7591bab1 MD |
1904 | * Iterate over all streams to set the begin data pending flag. |
1905 | * For now, the streams are indexed by stream handle so we have | |
1906 | * to iterate over all streams to find the one associated with | |
1907 | * the right session_id. | |
f7079f67 DG |
1908 | */ |
1909 | rcu_read_lock(); | |
d3e2ba59 | 1910 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1911 | node.node) { |
7591bab1 MD |
1912 | if (!stream_get(stream)) { |
1913 | continue; | |
1914 | } | |
5312a3ed | 1915 | if (stream->trace->session->id == msg.session_id) { |
7591bab1 MD |
1916 | pthread_mutex_lock(&stream->lock); |
1917 | stream->data_pending_check_done = false; | |
1918 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 DG |
1919 | DBG("Set begin data pending flag to stream %" PRIu64, |
1920 | stream->stream_handle); | |
1921 | } | |
7591bab1 | 1922 | stream_put(stream); |
f7079f67 DG |
1923 | } |
1924 | rcu_read_unlock(); | |
1925 | ||
53efb85a | 1926 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
1927 | /* All good, send back reply. */ |
1928 | reply.ret_code = htobe32(LTTNG_OK); | |
1929 | ||
5312a3ed JG |
1930 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1931 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1932 | ERR("Failed to send \"begin data pending\" command reply (ret = %zd)", | |
1933 | send_ret); | |
1934 | ret = -1; | |
1935 | } else { | |
1936 | ret = 0; | |
f7079f67 DG |
1937 | } |
1938 | ||
1939 | end_no_session: | |
1940 | return ret; | |
1941 | } | |
1942 | ||
1943 | /* | |
7591bab1 MD |
1944 | * End data pending command. This will check, for a given session id, if |
1945 | * each stream associated with it has its data_pending_check_done flag | |
1946 | * set. If not, this means that the client lost track of the stream but | |
1947 | * the data is still being streamed on our side. In this case, we inform | |
1948 | * the client that data is in flight. | |
f7079f67 DG |
1949 | * |
1950 | * Return to the client if there is data in flight or not with a ret_code. | |
1951 | */ | |
5312a3ed JG |
1952 | static int relay_end_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
1953 | struct relay_connection *conn, | |
1954 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
1955 | { |
1956 | int ret; | |
5312a3ed | 1957 | ssize_t send_ret; |
f7079f67 DG |
1958 | struct lttng_ht_iter iter; |
1959 | struct lttcomm_relayd_end_data_pending msg; | |
1960 | struct lttcomm_relayd_generic_reply reply; | |
1961 | struct relay_stream *stream; | |
f7079f67 DG |
1962 | uint32_t is_data_inflight = 0; |
1963 | ||
f7079f67 DG |
1964 | DBG("End data pending command"); |
1965 | ||
5312a3ed | 1966 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
1967 | ERR("Trying to check for data before version check"); |
1968 | ret = -1; | |
1969 | goto end_no_session; | |
1970 | } | |
1971 | ||
5312a3ed JG |
1972 | if (payload->size < sizeof(msg)) { |
1973 | ERR("Unexpected payload size in \"relay_end_data_pending\": expected >= %zu bytes, got %zu bytes", | |
1974 | sizeof(msg), payload->size); | |
f7079f67 DG |
1975 | ret = -1; |
1976 | goto end_no_session; | |
1977 | } | |
5312a3ed JG |
1978 | memcpy(&msg, payload->data, sizeof(msg)); |
1979 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 | 1980 | |
7591bab1 MD |
1981 | /* |
1982 | * Iterate over all streams to see if the begin data pending | |
1983 | * flag is set. | |
1984 | */ | |
f7079f67 | 1985 | rcu_read_lock(); |
d3e2ba59 | 1986 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 1987 | node.node) { |
7591bab1 MD |
1988 | if (!stream_get(stream)) { |
1989 | continue; | |
1990 | } | |
5312a3ed | 1991 | if (stream->trace->session->id != msg.session_id) { |
7591bab1 MD |
1992 | stream_put(stream); |
1993 | continue; | |
1994 | } | |
1995 | pthread_mutex_lock(&stream->lock); | |
1996 | if (!stream->data_pending_check_done) { | |
298a25ca JG |
1997 | uint64_t stream_seq; |
1998 | ||
1999 | if (session_streams_have_index(conn->session)) { | |
2000 | /* | |
2001 | * Ensure that both the index and stream data have been | |
2002 | * flushed up to the requested point. | |
2003 | */ | |
a8f9f353 | 2004 | stream_seq = min(stream->prev_data_seq, stream->prev_index_seq); |
298a25ca | 2005 | } else { |
a8f9f353 | 2006 | stream_seq = stream->prev_data_seq; |
298a25ca JG |
2007 | } |
2008 | if (!stream->closed || !(((int64_t) (stream_seq - stream->last_net_seq_num)) >= 0)) { | |
7591bab1 MD |
2009 | is_data_inflight = 1; |
2010 | DBG("Data is still in flight for stream %" PRIu64, | |
2011 | stream->stream_handle); | |
2012 | pthread_mutex_unlock(&stream->lock); | |
2013 | stream_put(stream); | |
2014 | break; | |
2015 | } | |
f7079f67 | 2016 | } |
7591bab1 MD |
2017 | pthread_mutex_unlock(&stream->lock); |
2018 | stream_put(stream); | |
f7079f67 DG |
2019 | } |
2020 | rcu_read_unlock(); | |
2021 | ||
53efb85a | 2022 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
2023 | /* All good, send back reply. */ |
2024 | reply.ret_code = htobe32(is_data_inflight); | |
2025 | ||
5312a3ed JG |
2026 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2027 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2028 | ERR("Failed to send \"end data pending\" command reply (ret = %zd)", | |
2029 | send_ret); | |
2030 | ret = -1; | |
2031 | } else { | |
2032 | ret = 0; | |
f7079f67 DG |
2033 | } |
2034 | ||
2035 | end_no_session: | |
2036 | return ret; | |
2037 | } | |
2038 | ||
1c20f0e2 JD |
2039 | /* |
2040 | * Receive an index for a specific stream. | |
2041 | * | |
2042 | * Return 0 on success else a negative value. | |
2043 | */ | |
5312a3ed JG |
2044 | static int relay_recv_index(const struct lttcomm_relayd_hdr *recv_hdr, |
2045 | struct relay_connection *conn, | |
2046 | const struct lttng_buffer_view *payload) | |
1c20f0e2 | 2047 | { |
5312a3ed JG |
2048 | int ret; |
2049 | ssize_t send_ret; | |
58eb9381 | 2050 | struct relay_session *session = conn->session; |
1c20f0e2 | 2051 | struct lttcomm_relayd_index index_info; |
1c20f0e2 JD |
2052 | struct lttcomm_relayd_generic_reply reply; |
2053 | struct relay_stream *stream; | |
f8f3885c | 2054 | size_t msg_len; |
1c20f0e2 | 2055 | |
58eb9381 | 2056 | assert(conn); |
1c20f0e2 JD |
2057 | |
2058 | DBG("Relay receiving index"); | |
2059 | ||
5312a3ed | 2060 | if (!session || !conn->version_check_done) { |
1c20f0e2 JD |
2061 | ERR("Trying to close a stream before version check"); |
2062 | ret = -1; | |
2063 | goto end_no_session; | |
2064 | } | |
2065 | ||
f8f3885c MD |
2066 | msg_len = lttcomm_relayd_index_len( |
2067 | lttng_to_index_major(conn->major, conn->minor), | |
2068 | lttng_to_index_minor(conn->major, conn->minor)); | |
5312a3ed JG |
2069 | if (payload->size < msg_len) { |
2070 | ERR("Unexpected payload size in \"relay_recv_index\": expected >= %zu bytes, got %zu bytes", | |
2071 | msg_len, payload->size); | |
1c20f0e2 JD |
2072 | ret = -1; |
2073 | goto end_no_session; | |
2074 | } | |
5312a3ed JG |
2075 | memcpy(&index_info, payload->data, msg_len); |
2076 | index_info.relay_stream_id = be64toh(index_info.relay_stream_id); | |
2077 | index_info.net_seq_num = be64toh(index_info.net_seq_num); | |
2078 | index_info.packet_size = be64toh(index_info.packet_size); | |
2079 | index_info.content_size = be64toh(index_info.content_size); | |
2080 | index_info.timestamp_begin = be64toh(index_info.timestamp_begin); | |
2081 | index_info.timestamp_end = be64toh(index_info.timestamp_end); | |
2082 | index_info.events_discarded = be64toh(index_info.events_discarded); | |
2083 | index_info.stream_id = be64toh(index_info.stream_id); | |
81df238b JR |
2084 | |
2085 | if (conn->minor >= 8) { | |
2086 | index_info.stream_instance_id = | |
2087 | be64toh(index_info.stream_instance_id); | |
2088 | index_info.packet_seq_num = be64toh(index_info.packet_seq_num); | |
2089 | } | |
5312a3ed JG |
2090 | |
2091 | stream = stream_get_by_id(index_info.relay_stream_id); | |
1c20f0e2 | 2092 | if (!stream) { |
7591bab1 | 2093 | ERR("stream_get_by_id not found"); |
1c20f0e2 | 2094 | ret = -1; |
7591bab1 | 2095 | goto end; |
1c20f0e2 | 2096 | } |
d3e2ba59 | 2097 | |
c35f9726 JG |
2098 | pthread_mutex_lock(&stream->lock); |
2099 | ret = stream_add_index(stream, &index_info); | |
2100 | pthread_mutex_unlock(&stream->lock); | |
2101 | if (ret) { | |
7591bab1 MD |
2102 | goto end_stream_put; |
2103 | } | |
1c20f0e2 | 2104 | |
7591bab1 | 2105 | end_stream_put: |
7591bab1 | 2106 | stream_put(stream); |
7591bab1 | 2107 | end: |
53efb85a | 2108 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
2109 | if (ret < 0) { |
2110 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
2111 | } else { | |
2112 | reply.ret_code = htobe32(LTTNG_OK); | |
2113 | } | |
58eb9381 | 2114 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed JG |
2115 | if (send_ret < (ssize_t) sizeof(reply)) { |
2116 | ERR("Failed to send \"recv index\" command reply (ret = %zd)", send_ret); | |
2117 | ret = -1; | |
1c20f0e2 JD |
2118 | } |
2119 | ||
2120 | end_no_session: | |
2121 | return ret; | |
2122 | } | |
2123 | ||
a4baae1b JD |
2124 | /* |
2125 | * Receive the streams_sent message. | |
2126 | * | |
2127 | * Return 0 on success else a negative value. | |
2128 | */ | |
5312a3ed JG |
2129 | static int relay_streams_sent(const struct lttcomm_relayd_hdr *recv_hdr, |
2130 | struct relay_connection *conn, | |
2131 | const struct lttng_buffer_view *payload) | |
a4baae1b | 2132 | { |
5312a3ed JG |
2133 | int ret; |
2134 | ssize_t send_ret; | |
a4baae1b JD |
2135 | struct lttcomm_relayd_generic_reply reply; |
2136 | ||
58eb9381 | 2137 | assert(conn); |
a4baae1b JD |
2138 | |
2139 | DBG("Relay receiving streams_sent"); | |
2140 | ||
5312a3ed | 2141 | if (!conn->session || !conn->version_check_done) { |
a4baae1b JD |
2142 | ERR("Trying to close a stream before version check"); |
2143 | ret = -1; | |
2144 | goto end_no_session; | |
2145 | } | |
2146 | ||
2147 | /* | |
7591bab1 MD |
2148 | * Publish every pending stream in the connection recv list which are |
2149 | * now ready to be used by the viewer. | |
4a9daf17 | 2150 | */ |
7591bab1 | 2151 | publish_connection_local_streams(conn); |
4a9daf17 | 2152 | |
53efb85a | 2153 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2154 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2155 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed JG |
2156 | if (send_ret < (ssize_t) sizeof(reply)) { |
2157 | ERR("Failed to send \"streams sent\" command reply (ret = %zd)", | |
2158 | send_ret); | |
2159 | ret = -1; | |
a4baae1b JD |
2160 | } else { |
2161 | /* Success. */ | |
2162 | ret = 0; | |
2163 | } | |
2164 | ||
2165 | end_no_session: | |
2166 | return ret; | |
2167 | } | |
2168 | ||
d3ecc550 | 2169 | /* |
c35f9726 JG |
2170 | * relay_rotate_session_stream: rotate a stream to a new tracefile for the |
2171 | * session rotation feature (not the tracefile rotation feature). | |
d3ecc550 | 2172 | */ |
c35f9726 JG |
2173 | static int relay_rotate_session_streams( |
2174 | const struct lttcomm_relayd_hdr *recv_hdr, | |
5312a3ed JG |
2175 | struct relay_connection *conn, |
2176 | const struct lttng_buffer_view *payload) | |
d3ecc550 | 2177 | { |
30b9d5ab | 2178 | int ret = 0; |
c35f9726 | 2179 | uint32_t i; |
5312a3ed | 2180 | ssize_t send_ret; |
c35f9726 | 2181 | enum lttng_error_code reply_code = LTTNG_ERR_UNK; |
d3ecc550 | 2182 | struct relay_session *session = conn->session; |
c35f9726 JG |
2183 | struct lttcomm_relayd_rotate_streams rotate_streams; |
2184 | struct lttcomm_relayd_generic_reply reply = {}; | |
2185 | struct relay_stream *stream = NULL; | |
2186 | const size_t header_len = sizeof(struct lttcomm_relayd_rotate_streams); | |
2187 | struct lttng_trace_chunk *next_trace_chunk = NULL; | |
2188 | struct lttng_buffer_view stream_positions; | |
70626904 JG |
2189 | char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)]; |
2190 | const char *chunk_id_str = "none"; | |
d3ecc550 | 2191 | |
d3ecc550 JD |
2192 | if (!session || !conn->version_check_done) { |
2193 | ERR("Trying to rotate a stream before version check"); | |
2194 | ret = -1; | |
2195 | goto end_no_reply; | |
2196 | } | |
2197 | ||
2198 | if (session->major == 2 && session->minor < 11) { | |
2199 | ERR("Unsupported feature before 2.11"); | |
2200 | ret = -1; | |
2201 | goto end_no_reply; | |
2202 | } | |
2203 | ||
5312a3ed JG |
2204 | if (payload->size < header_len) { |
2205 | ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected >= %zu bytes, got %zu bytes", | |
2206 | header_len, payload->size); | |
d3ecc550 JD |
2207 | ret = -1; |
2208 | goto end_no_reply; | |
2209 | } | |
2210 | ||
c35f9726 | 2211 | memcpy(&rotate_streams, payload->data, header_len); |
5312a3ed | 2212 | |
c35f9726 JG |
2213 | /* Convert header to host endianness. */ |
2214 | rotate_streams = (typeof(rotate_streams)) { | |
2215 | .stream_count = be32toh(rotate_streams.stream_count), | |
2216 | .new_chunk_id = (typeof(rotate_streams.new_chunk_id)) { | |
2217 | .is_set = !!rotate_streams.new_chunk_id.is_set, | |
2218 | .value = be64toh(rotate_streams.new_chunk_id.value), | |
2219 | } | |
2220 | }; | |
d3ecc550 | 2221 | |
c35f9726 JG |
2222 | if (rotate_streams.new_chunk_id.is_set) { |
2223 | /* | |
2224 | * Retrieve the trace chunk the stream must transition to. As | |
2225 | * per the protocol, this chunk should have been created | |
2226 | * before this command is received. | |
2227 | */ | |
2228 | next_trace_chunk = sessiond_trace_chunk_registry_get_chunk( | |
2229 | sessiond_trace_chunk_registry, | |
2230 | session->sessiond_uuid, session->id, | |
2231 | rotate_streams.new_chunk_id.value); | |
2232 | if (!next_trace_chunk) { | |
2233 | char uuid_str[UUID_STR_LEN]; | |
2234 | ||
2235 | lttng_uuid_to_str(session->sessiond_uuid, uuid_str); | |
2236 | ERR("Unknown next trace chunk in ROTATE_STREAMS command: sessiond_uuid = {%s}, session_id = %" PRIu64 | |
2237 | ", trace_chunk_id = %" PRIu64, | |
2238 | uuid_str, session->id, | |
2239 | rotate_streams.new_chunk_id.value); | |
2240 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2241 | ret = -1; | |
2242 | goto end; | |
2243 | } | |
70626904 JG |
2244 | |
2245 | ret = snprintf(chunk_id_buf, sizeof(chunk_id_buf), "%" PRIu64, | |
2246 | rotate_streams.new_chunk_id.value); | |
2247 | if (ret < 0 || ret >= sizeof(chunk_id_buf)) { | |
2248 | chunk_id_str = "formatting error"; | |
2249 | } else { | |
2250 | chunk_id_str = chunk_id_buf; | |
2251 | } | |
ecd1a12f | 2252 | session->has_rotated = true; |
d3ecc550 JD |
2253 | } |
2254 | ||
70626904 JG |
2255 | DBG("Rotate %" PRIu32 " streams of session \"%s\" to chunk \"%s\"", |
2256 | rotate_streams.stream_count, session->session_name, | |
2257 | chunk_id_str); | |
2258 | ||
c35f9726 JG |
2259 | stream_positions = lttng_buffer_view_from_view(payload, |
2260 | sizeof(rotate_streams), -1); | |
2261 | if (!stream_positions.data || | |
2262 | stream_positions.size < | |
2263 | (rotate_streams.stream_count * | |
2264 | sizeof(struct lttcomm_relayd_stream_rotation_position))) { | |
2265 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
d3ecc550 | 2266 | ret = -1; |
5312a3ed | 2267 | goto end; |
d3ecc550 JD |
2268 | } |
2269 | ||
c35f9726 JG |
2270 | for (i = 0; i < rotate_streams.stream_count; i++) { |
2271 | struct lttcomm_relayd_stream_rotation_position *position_comm = | |
2272 | &((typeof(position_comm)) stream_positions.data)[i]; | |
2273 | const struct lttcomm_relayd_stream_rotation_position pos = { | |
2274 | .stream_id = be64toh(position_comm->stream_id), | |
2275 | .rotate_at_seq_num = be64toh( | |
2276 | position_comm->rotate_at_seq_num), | |
2277 | }; | |
5312a3ed | 2278 | |
c35f9726 JG |
2279 | stream = stream_get_by_id(pos.stream_id); |
2280 | if (!stream) { | |
2281 | reply_code = LTTNG_ERR_INVALID; | |
2282 | ret = -1; | |
2283 | goto end; | |
c6db3843 JG |
2284 | } |
2285 | ||
c35f9726 JG |
2286 | pthread_mutex_lock(&stream->lock); |
2287 | ret = stream_set_pending_rotation(stream, next_trace_chunk, | |
2288 | pos.rotate_at_seq_num); | |
2289 | pthread_mutex_unlock(&stream->lock); | |
2290 | if (ret) { | |
2291 | reply_code = LTTNG_ERR_FILE_CREATION_ERROR; | |
2292 | goto end; | |
c6db3843 | 2293 | } |
c35f9726 JG |
2294 | |
2295 | stream_put(stream); | |
2296 | stream = NULL; | |
d3ecc550 JD |
2297 | } |
2298 | ||
c35f9726 | 2299 | reply_code = LTTNG_OK; |
eaeb64a9 | 2300 | ret = 0; |
d3ecc550 | 2301 | end: |
c35f9726 JG |
2302 | if (stream) { |
2303 | stream_put(stream); | |
d3ecc550 | 2304 | } |
c35f9726 JG |
2305 | |
2306 | reply.ret_code = htobe32((uint32_t) reply_code); | |
d3ecc550 JD |
2307 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
2308 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed JG |
2309 | if (send_ret < (ssize_t) sizeof(reply)) { |
2310 | ERR("Failed to send \"rotate session stream\" command reply (ret = %zd)", | |
2311 | send_ret); | |
2312 | ret = -1; | |
d3ecc550 | 2313 | } |
d3ecc550 | 2314 | end_no_reply: |
c35f9726 | 2315 | lttng_trace_chunk_put(next_trace_chunk); |
d3ecc550 JD |
2316 | return ret; |
2317 | } | |
2318 | ||
e5add6d0 | 2319 | |
e5add6d0 JG |
2320 | |
2321 | /* | |
2322 | * relay_create_trace_chunk: create a new trace chunk | |
2323 | */ | |
2324 | static int relay_create_trace_chunk(const struct lttcomm_relayd_hdr *recv_hdr, | |
2325 | struct relay_connection *conn, | |
2326 | const struct lttng_buffer_view *payload) | |
2327 | { | |
2328 | int ret = 0; | |
2329 | ssize_t send_ret; | |
2330 | struct relay_session *session = conn->session; | |
2331 | struct lttcomm_relayd_create_trace_chunk *msg; | |
2332 | struct lttcomm_relayd_generic_reply reply = {}; | |
2333 | struct lttng_buffer_view header_view; | |
2334 | struct lttng_buffer_view chunk_name_view; | |
2335 | struct lttng_trace_chunk *chunk = NULL, *published_chunk = NULL; | |
2336 | enum lttng_error_code reply_code = LTTNG_OK; | |
2337 | enum lttng_trace_chunk_status chunk_status; | |
2338 | struct lttng_directory_handle session_output; | |
2339 | ||
2340 | if (!session || !conn->version_check_done) { | |
2341 | ERR("Trying to create a trace chunk before version check"); | |
2342 | ret = -1; | |
2343 | goto end_no_reply; | |
2344 | } | |
2345 | ||
2346 | if (session->major == 2 && session->minor < 11) { | |
2347 | ERR("Chunk creation command is unsupported before 2.11"); | |
2348 | ret = -1; | |
2349 | goto end_no_reply; | |
2350 | } | |
2351 | ||
2352 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
2353 | if (!header_view.data) { | |
2354 | ERR("Failed to receive payload of chunk creation command"); | |
2355 | ret = -1; | |
2356 | goto end_no_reply; | |
2357 | } | |
2358 | ||
2359 | /* Convert to host endianness. */ | |
2360 | msg = (typeof(msg)) header_view.data; | |
2361 | msg->chunk_id = be64toh(msg->chunk_id); | |
2362 | msg->creation_timestamp = be64toh(msg->creation_timestamp); | |
2363 | msg->override_name_length = be32toh(msg->override_name_length); | |
2364 | ||
2365 | chunk = lttng_trace_chunk_create( | |
2366 | msg->chunk_id, msg->creation_timestamp); | |
2367 | if (!chunk) { | |
2368 | ERR("Failed to create trace chunk in trace chunk creation command"); | |
2369 | ret = -1; | |
2370 | reply_code = LTTNG_ERR_NOMEM; | |
2371 | goto end; | |
2372 | } | |
2373 | ||
2374 | if (msg->override_name_length) { | |
2375 | const char *name; | |
2376 | ||
2377 | chunk_name_view = lttng_buffer_view_from_view(payload, | |
2378 | sizeof(*msg), | |
2379 | msg->override_name_length); | |
2380 | name = chunk_name_view.data; | |
2381 | if (!name || name[msg->override_name_length - 1]) { | |
2382 | ERR("Failed to receive payload of chunk creation command"); | |
2383 | ret = -1; | |
2384 | reply_code = LTTNG_ERR_INVALID; | |
2385 | goto end; | |
2386 | } | |
2387 | ||
2388 | chunk_status = lttng_trace_chunk_override_name( | |
2389 | chunk, chunk_name_view.data); | |
2390 | switch (chunk_status) { | |
2391 | case LTTNG_TRACE_CHUNK_STATUS_OK: | |
2392 | break; | |
2393 | case LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT: | |
2394 | ERR("Failed to set the name of new trace chunk in trace chunk creation command (invalid name)"); | |
2395 | reply_code = LTTNG_ERR_INVALID; | |
2396 | ret = -1; | |
2397 | goto end; | |
2398 | default: | |
2399 | ERR("Failed to set the name of new trace chunk in trace chunk creation command (unknown error)"); | |
2400 | reply_code = LTTNG_ERR_UNK; | |
2401 | ret = -1; | |
2402 | goto end; | |
2403 | } | |
2404 | } | |
2405 | ||
e5add6d0 JG |
2406 | chunk_status = lttng_trace_chunk_set_credentials_current_user(chunk); |
2407 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2408 | reply_code = LTTNG_ERR_UNK; | |
2409 | ret = -1; | |
2410 | goto end; | |
2411 | } | |
2412 | ||
0ccc0411 JG |
2413 | ret = session_init_output_directory_handle( |
2414 | conn->session, &session_output); | |
2415 | if (ret) { | |
2416 | reply_code = LTTNG_ERR_CREATE_DIR_FAIL; | |
2417 | goto end; | |
2418 | } | |
e5add6d0 | 2419 | chunk_status = lttng_trace_chunk_set_as_owner(chunk, &session_output); |
0ccc0411 | 2420 | lttng_directory_handle_fini(&session_output); |
e5add6d0 JG |
2421 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
2422 | reply_code = LTTNG_ERR_UNK; | |
2423 | ret = -1; | |
2424 | goto end; | |
2425 | } | |
2426 | ||
2427 | published_chunk = sessiond_trace_chunk_registry_publish_chunk( | |
2428 | sessiond_trace_chunk_registry, | |
2429 | conn->session->sessiond_uuid, | |
2430 | conn->session->id, | |
2431 | chunk); | |
2432 | if (!published_chunk) { | |
2433 | char uuid_str[UUID_STR_LEN]; | |
2434 | ||
2435 | lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str); | |
2436 | ERR("Failed to publish chunk: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
2437 | uuid_str, | |
2438 | conn->session->id, | |
2439 | msg->chunk_id); | |
2440 | ret = -1; | |
2441 | reply_code = LTTNG_ERR_NOMEM; | |
2442 | goto end; | |
2443 | } | |
2444 | ||
2445 | pthread_mutex_lock(&conn->session->lock); | |
62bad3bf JG |
2446 | if (conn->session->pending_closure_trace_chunk) { |
2447 | /* | |
2448 | * Invalid; this means a second create_trace_chunk command was | |
2449 | * received before a close_trace_chunk. | |
2450 | */ | |
2451 | ERR("Invalid trace chunk close command received; a trace chunk is already waiting for a trace chunk close command"); | |
2452 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2453 | ret = -1; | |
2454 | goto end_unlock_session; | |
2455 | } | |
2456 | conn->session->pending_closure_trace_chunk = | |
2457 | conn->session->current_trace_chunk; | |
e5add6d0 | 2458 | conn->session->current_trace_chunk = published_chunk; |
e5add6d0 | 2459 | published_chunk = NULL; |
62bad3bf | 2460 | end_unlock_session: |
c35f9726 | 2461 | pthread_mutex_unlock(&conn->session->lock); |
e5add6d0 JG |
2462 | end: |
2463 | reply.ret_code = htobe32((uint32_t) reply_code); | |
2464 | send_ret = conn->sock->ops->sendmsg(conn->sock, | |
2465 | &reply, | |
2466 | sizeof(struct lttcomm_relayd_generic_reply), | |
2467 | 0); | |
2468 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2469 | ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)", | |
2470 | send_ret); | |
2471 | ret = -1; | |
2472 | } | |
2473 | end_no_reply: | |
2474 | lttng_trace_chunk_put(chunk); | |
2475 | lttng_trace_chunk_put(published_chunk); | |
e5add6d0 JG |
2476 | return ret; |
2477 | } | |
2478 | ||
bbc4768c JG |
2479 | /* |
2480 | * relay_close_trace_chunk: close a trace chunk | |
2481 | */ | |
2482 | static int relay_close_trace_chunk(const struct lttcomm_relayd_hdr *recv_hdr, | |
2483 | struct relay_connection *conn, | |
2484 | const struct lttng_buffer_view *payload) | |
2485 | { | |
9898f786 | 2486 | int ret = 0, buf_ret; |
bbc4768c JG |
2487 | ssize_t send_ret; |
2488 | struct relay_session *session = conn->session; | |
2489 | struct lttcomm_relayd_close_trace_chunk *msg; | |
ecd1a12f | 2490 | struct lttcomm_relayd_close_trace_chunk_reply reply = {}; |
bbc4768c JG |
2491 | struct lttng_buffer_view header_view; |
2492 | struct lttng_trace_chunk *chunk = NULL; | |
2493 | enum lttng_error_code reply_code = LTTNG_OK; | |
2494 | enum lttng_trace_chunk_status chunk_status; | |
2495 | uint64_t chunk_id; | |
c35f9726 | 2496 | LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command = {}; |
bbc4768c | 2497 | time_t close_timestamp; |
ecd1a12f MD |
2498 | char closed_trace_chunk_path[LTTNG_PATH_MAX]; |
2499 | size_t path_length = 0; | |
2500 | const char *chunk_name = NULL; | |
2501 | struct lttng_dynamic_buffer reply_payload; | |
2502 | ||
2503 | lttng_dynamic_buffer_init(&reply_payload); | |
bbc4768c JG |
2504 | |
2505 | if (!session || !conn->version_check_done) { | |
2506 | ERR("Trying to close a trace chunk before version check"); | |
2507 | ret = -1; | |
2508 | goto end_no_reply; | |
2509 | } | |
2510 | ||
2511 | if (session->major == 2 && session->minor < 11) { | |
2512 | ERR("Chunk close command is unsupported before 2.11"); | |
2513 | ret = -1; | |
2514 | goto end_no_reply; | |
2515 | } | |
2516 | ||
2517 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
2518 | if (!header_view.data) { | |
2519 | ERR("Failed to receive payload of chunk close command"); | |
2520 | ret = -1; | |
2521 | goto end_no_reply; | |
2522 | } | |
2523 | ||
2524 | /* Convert to host endianness. */ | |
2525 | msg = (typeof(msg)) header_view.data; | |
2526 | chunk_id = be64toh(msg->chunk_id); | |
2527 | close_timestamp = (time_t) be64toh(msg->close_timestamp); | |
2528 | close_command = (typeof(close_command)){ | |
2529 | .value = be32toh(msg->close_command.value), | |
2530 | .is_set = msg->close_command.is_set, | |
2531 | }; | |
2532 | ||
2533 | chunk = sessiond_trace_chunk_registry_get_chunk( | |
2534 | sessiond_trace_chunk_registry, | |
2535 | conn->session->sessiond_uuid, | |
2536 | conn->session->id, | |
2537 | chunk_id); | |
2538 | if (!chunk) { | |
2539 | char uuid_str[UUID_STR_LEN]; | |
2540 | ||
2541 | lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str); | |
2542 | ERR("Failed to find chunk to close: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
2543 | uuid_str, | |
2544 | conn->session->id, | |
2545 | msg->chunk_id); | |
2546 | ret = -1; | |
2547 | reply_code = LTTNG_ERR_NOMEM; | |
2548 | goto end; | |
2549 | } | |
2550 | ||
62bad3bf JG |
2551 | pthread_mutex_lock(&session->lock); |
2552 | if (session->pending_closure_trace_chunk && | |
2553 | session->pending_closure_trace_chunk != chunk) { | |
2554 | ERR("Trace chunk close command for session \"%s\" does not target the trace chunk pending closure", | |
2555 | session->session_name); | |
2556 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2557 | ret = -1; | |
2558 | goto end_unlock_session; | |
2559 | } | |
2560 | ||
bbc4768c JG |
2561 | chunk_status = lttng_trace_chunk_set_close_timestamp( |
2562 | chunk, close_timestamp); | |
2563 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2564 | ERR("Failed to set trace chunk close timestamp"); | |
2565 | ret = -1; | |
2566 | reply_code = LTTNG_ERR_UNK; | |
62bad3bf | 2567 | goto end_unlock_session; |
bbc4768c JG |
2568 | } |
2569 | ||
2570 | if (close_command.is_set) { | |
2571 | chunk_status = lttng_trace_chunk_set_close_command( | |
2572 | chunk, close_command.value); | |
2573 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2574 | ret = -1; | |
2575 | reply_code = LTTNG_ERR_INVALID; | |
62bad3bf | 2576 | goto end_unlock_session; |
bbc4768c JG |
2577 | } |
2578 | } | |
ecd1a12f MD |
2579 | chunk_status = lttng_trace_chunk_get_name(chunk, &chunk_name, NULL); |
2580 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2581 | ERR("Failed to get chunk name"); | |
2582 | ret = -1; | |
2583 | reply_code = LTTNG_ERR_UNK; | |
2584 | goto end_unlock_session; | |
2585 | } | |
2586 | if (!session->has_rotated && !session->snapshot) { | |
2587 | ret = lttng_strncpy(closed_trace_chunk_path, | |
2588 | session->output_path, | |
2589 | sizeof(closed_trace_chunk_path)); | |
2590 | if (ret) { | |
2591 | ERR("Failed to send trace chunk path: path length of %zu bytes exceeds the maximal allowed length of %zu bytes", | |
2592 | strlen(session->output_path), | |
2593 | sizeof(closed_trace_chunk_path)); | |
2594 | reply_code = LTTNG_ERR_NOMEM; | |
2595 | ret = -1; | |
2596 | goto end_unlock_session; | |
2597 | } | |
2598 | } else { | |
2599 | if (session->snapshot) { | |
2600 | ret = snprintf(closed_trace_chunk_path, | |
2601 | sizeof(closed_trace_chunk_path), | |
2602 | "%s/%s", session->output_path, | |
2603 | chunk_name); | |
2604 | } else { | |
2605 | ret = snprintf(closed_trace_chunk_path, | |
2606 | sizeof(closed_trace_chunk_path), | |
2607 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY | |
2608 | "/%s", | |
2609 | session->output_path, chunk_name); | |
2610 | } | |
2611 | if (ret < 0 || ret == sizeof(closed_trace_chunk_path)) { | |
2612 | ERR("Failed to format closed trace chunk resulting path"); | |
2613 | reply_code = ret < 0 ? LTTNG_ERR_UNK : LTTNG_ERR_NOMEM; | |
2614 | ret = -1; | |
2615 | goto end_unlock_session; | |
2616 | } | |
2617 | } | |
2618 | DBG("Reply chunk path on close: %s", closed_trace_chunk_path); | |
2619 | path_length = strlen(closed_trace_chunk_path) + 1; | |
2620 | if (path_length > UINT32_MAX) { | |
2621 | ERR("Closed trace chunk path exceeds the maximal length allowed by the protocol"); | |
2622 | ret = -1; | |
2623 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2624 | goto end_unlock_session; | |
2625 | } | |
bbc4768c | 2626 | |
c35f9726 JG |
2627 | if (session->current_trace_chunk == chunk) { |
2628 | /* | |
2629 | * After a trace chunk close command, no new streams | |
2630 | * referencing the chunk may be created. Hence, on the | |
2631 | * event that no new trace chunk have been created for | |
2632 | * the session, the reference to the current trace chunk | |
2633 | * is released in order to allow it to be reclaimed when | |
2634 | * the last stream releases its reference to it. | |
2635 | */ | |
2636 | lttng_trace_chunk_put(session->current_trace_chunk); | |
2637 | session->current_trace_chunk = NULL; | |
2638 | } | |
62bad3bf JG |
2639 | lttng_trace_chunk_put(session->pending_closure_trace_chunk); |
2640 | session->pending_closure_trace_chunk = NULL; | |
2641 | end_unlock_session: | |
c35f9726 JG |
2642 | pthread_mutex_unlock(&session->lock); |
2643 | ||
bbc4768c | 2644 | end: |
ecd1a12f MD |
2645 | reply.generic.ret_code = htobe32((uint32_t) reply_code); |
2646 | reply.path_length = htobe32((uint32_t) path_length); | |
9898f786 | 2647 | buf_ret = lttng_dynamic_buffer_append( |
ecd1a12f | 2648 | &reply_payload, &reply, sizeof(reply)); |
9898f786 | 2649 | if (buf_ret) { |
ecd1a12f MD |
2650 | ERR("Failed to append \"close trace chunk\" command reply header to payload buffer"); |
2651 | goto end_no_reply; | |
2652 | } | |
2653 | ||
2654 | if (reply_code == LTTNG_OK) { | |
9898f786 | 2655 | buf_ret = lttng_dynamic_buffer_append(&reply_payload, |
ecd1a12f | 2656 | closed_trace_chunk_path, path_length); |
9898f786 | 2657 | if (buf_ret) { |
ecd1a12f MD |
2658 | ERR("Failed to append \"close trace chunk\" command reply path to payload buffer"); |
2659 | goto end_no_reply; | |
2660 | } | |
2661 | } | |
2662 | ||
bbc4768c | 2663 | send_ret = conn->sock->ops->sendmsg(conn->sock, |
ecd1a12f MD |
2664 | reply_payload.data, |
2665 | reply_payload.size, | |
bbc4768c | 2666 | 0); |
ecd1a12f MD |
2667 | if (send_ret < reply_payload.size) { |
2668 | ERR("Failed to send \"close trace chunk\" command reply of %zu bytes (ret = %zd)", | |
2669 | reply_payload.size, send_ret); | |
bbc4768c | 2670 | ret = -1; |
ecd1a12f | 2671 | goto end_no_reply; |
bbc4768c JG |
2672 | } |
2673 | end_no_reply: | |
2674 | lttng_trace_chunk_put(chunk); | |
ecd1a12f | 2675 | lttng_dynamic_buffer_reset(&reply_payload); |
bbc4768c JG |
2676 | return ret; |
2677 | } | |
2678 | ||
c35f9726 JG |
2679 | /* |
2680 | * relay_trace_chunk_exists: check if a trace chunk exists | |
2681 | */ | |
2682 | static int relay_trace_chunk_exists(const struct lttcomm_relayd_hdr *recv_hdr, | |
2683 | struct relay_connection *conn, | |
2684 | const struct lttng_buffer_view *payload) | |
2685 | { | |
2686 | int ret = 0; | |
2687 | ssize_t send_ret; | |
2688 | struct relay_session *session = conn->session; | |
2689 | struct lttcomm_relayd_trace_chunk_exists *msg; | |
2690 | struct lttcomm_relayd_trace_chunk_exists_reply reply = {}; | |
2691 | struct lttng_buffer_view header_view; | |
c35f9726 | 2692 | uint64_t chunk_id; |
6b584c2e | 2693 | bool chunk_exists; |
c35f9726 JG |
2694 | |
2695 | if (!session || !conn->version_check_done) { | |
2696 | ERR("Trying to close a trace chunk before version check"); | |
2697 | ret = -1; | |
2698 | goto end_no_reply; | |
2699 | } | |
2700 | ||
2701 | if (session->major == 2 && session->minor < 11) { | |
2702 | ERR("Chunk close command is unsupported before 2.11"); | |
2703 | ret = -1; | |
2704 | goto end_no_reply; | |
2705 | } | |
2706 | ||
2707 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
2708 | if (!header_view.data) { | |
2709 | ERR("Failed to receive payload of chunk close command"); | |
2710 | ret = -1; | |
2711 | goto end_no_reply; | |
2712 | } | |
2713 | ||
2714 | /* Convert to host endianness. */ | |
2715 | msg = (typeof(msg)) header_view.data; | |
2716 | chunk_id = be64toh(msg->chunk_id); | |
2717 | ||
6b584c2e | 2718 | ret = sessiond_trace_chunk_registry_chunk_exists( |
c35f9726 JG |
2719 | sessiond_trace_chunk_registry, |
2720 | conn->session->sessiond_uuid, | |
2721 | conn->session->id, | |
6b584c2e JG |
2722 | chunk_id, &chunk_exists); |
2723 | /* | |
2724 | * If ret is not 0, send the reply and report the error to the caller. | |
2725 | * It is a protocol (or internal) error and the session/connection | |
2726 | * should be torn down. | |
2727 | */ | |
2728 | reply = (typeof(reply)){ | |
2729 | .generic.ret_code = htobe32((uint32_t) | |
2730 | (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)), | |
2731 | .trace_chunk_exists = ret == 0 ? chunk_exists : 0, | |
c35f9726 | 2732 | }; |
6b584c2e JG |
2733 | send_ret = conn->sock->ops->sendmsg( |
2734 | conn->sock, &reply, sizeof(reply), 0); | |
c35f9726 JG |
2735 | if (send_ret < (ssize_t) sizeof(reply)) { |
2736 | ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)", | |
2737 | send_ret); | |
2738 | ret = -1; | |
2739 | } | |
2740 | end_no_reply: | |
c35f9726 JG |
2741 | return ret; |
2742 | } | |
2743 | ||
5312a3ed JG |
2744 | #define DBG_CMD(cmd_name, conn) \ |
2745 | DBG3("Processing \"%s\" command for socket %i", cmd_name, conn->sock->fd); | |
2746 | ||
2747 | static int relay_process_control_command(struct relay_connection *conn, | |
2748 | const struct lttcomm_relayd_hdr *header, | |
2749 | const struct lttng_buffer_view *payload) | |
b8aa1682 JD |
2750 | { |
2751 | int ret = 0; | |
2752 | ||
5312a3ed | 2753 | switch (header->cmd) { |
b8aa1682 | 2754 | case RELAYD_CREATE_SESSION: |
5312a3ed JG |
2755 | DBG_CMD("RELAYD_CREATE_SESSION", conn); |
2756 | ret = relay_create_session(header, conn, payload); | |
b8aa1682 | 2757 | break; |
b8aa1682 | 2758 | case RELAYD_ADD_STREAM: |
5312a3ed JG |
2759 | DBG_CMD("RELAYD_ADD_STREAM", conn); |
2760 | ret = relay_add_stream(header, conn, payload); | |
b8aa1682 JD |
2761 | break; |
2762 | case RELAYD_START_DATA: | |
5312a3ed JG |
2763 | DBG_CMD("RELAYD_START_DATA", conn); |
2764 | ret = relay_start(header, conn, payload); | |
b8aa1682 JD |
2765 | break; |
2766 | case RELAYD_SEND_METADATA: | |
5312a3ed JG |
2767 | DBG_CMD("RELAYD_SEND_METADATA", conn); |
2768 | ret = relay_recv_metadata(header, conn, payload); | |
b8aa1682 JD |
2769 | break; |
2770 | case RELAYD_VERSION: | |
5312a3ed JG |
2771 | DBG_CMD("RELAYD_VERSION", conn); |
2772 | ret = relay_send_version(header, conn, payload); | |
b8aa1682 | 2773 | break; |
173af62f | 2774 | case RELAYD_CLOSE_STREAM: |
5312a3ed JG |
2775 | DBG_CMD("RELAYD_CLOSE_STREAM", conn); |
2776 | ret = relay_close_stream(header, conn, payload); | |
173af62f | 2777 | break; |
6d805429 | 2778 | case RELAYD_DATA_PENDING: |
5312a3ed JG |
2779 | DBG_CMD("RELAYD_DATA_PENDING", conn); |
2780 | ret = relay_data_pending(header, conn, payload); | |
c8f59ee5 DG |
2781 | break; |
2782 | case RELAYD_QUIESCENT_CONTROL: | |
5312a3ed JG |
2783 | DBG_CMD("RELAYD_QUIESCENT_CONTROL", conn); |
2784 | ret = relay_quiescent_control(header, conn, payload); | |
c8f59ee5 | 2785 | break; |
f7079f67 | 2786 | case RELAYD_BEGIN_DATA_PENDING: |
5312a3ed JG |
2787 | DBG_CMD("RELAYD_BEGIN_DATA_PENDING", conn); |
2788 | ret = relay_begin_data_pending(header, conn, payload); | |
f7079f67 DG |
2789 | break; |
2790 | case RELAYD_END_DATA_PENDING: | |
5312a3ed JG |
2791 | DBG_CMD("RELAYD_END_DATA_PENDING", conn); |
2792 | ret = relay_end_data_pending(header, conn, payload); | |
f7079f67 | 2793 | break; |
1c20f0e2 | 2794 | case RELAYD_SEND_INDEX: |
5312a3ed JG |
2795 | DBG_CMD("RELAYD_SEND_INDEX", conn); |
2796 | ret = relay_recv_index(header, conn, payload); | |
1c20f0e2 | 2797 | break; |
a4baae1b | 2798 | case RELAYD_STREAMS_SENT: |
5312a3ed JG |
2799 | DBG_CMD("RELAYD_STREAMS_SENT", conn); |
2800 | ret = relay_streams_sent(header, conn, payload); | |
a4baae1b | 2801 | break; |
93ec662e | 2802 | case RELAYD_RESET_METADATA: |
5312a3ed JG |
2803 | DBG_CMD("RELAYD_RESET_METADATA", conn); |
2804 | ret = relay_reset_metadata(header, conn, payload); | |
93ec662e | 2805 | break; |
c35f9726 JG |
2806 | case RELAYD_ROTATE_STREAMS: |
2807 | DBG_CMD("RELAYD_ROTATE_STREAMS", conn); | |
2808 | ret = relay_rotate_session_streams(header, conn, payload); | |
d3ecc550 | 2809 | break; |
e5add6d0 JG |
2810 | case RELAYD_CREATE_TRACE_CHUNK: |
2811 | DBG_CMD("RELAYD_CREATE_TRACE_CHUNK", conn); | |
2812 | ret = relay_create_trace_chunk(header, conn, payload); | |
2813 | break; | |
bbc4768c JG |
2814 | case RELAYD_CLOSE_TRACE_CHUNK: |
2815 | DBG_CMD("RELAYD_CLOSE_TRACE_CHUNK", conn); | |
2816 | ret = relay_close_trace_chunk(header, conn, payload); | |
2817 | break; | |
c35f9726 JG |
2818 | case RELAYD_TRACE_CHUNK_EXISTS: |
2819 | DBG_CMD("RELAYD_TRACE_CHUNK_EXISTS", conn); | |
2820 | ret = relay_trace_chunk_exists(header, conn, payload); | |
2821 | break; | |
b8aa1682 JD |
2822 | case RELAYD_UPDATE_SYNC_INFO: |
2823 | default: | |
5312a3ed | 2824 | ERR("Received unknown command (%u)", header->cmd); |
58eb9381 | 2825 | relay_unknown_command(conn); |
b8aa1682 JD |
2826 | ret = -1; |
2827 | goto end; | |
2828 | } | |
2829 | ||
2830 | end: | |
2831 | return ret; | |
2832 | } | |
2833 | ||
5569b118 JG |
2834 | static enum relay_connection_status relay_process_control_receive_payload( |
2835 | struct relay_connection *conn) | |
5312a3ed JG |
2836 | { |
2837 | int ret = 0; | |
5569b118 | 2838 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
2839 | struct lttng_dynamic_buffer *reception_buffer = |
2840 | &conn->protocol.ctrl.reception_buffer; | |
2841 | struct ctrl_connection_state_receive_payload *state = | |
2842 | &conn->protocol.ctrl.state.receive_payload; | |
2843 | struct lttng_buffer_view payload_view; | |
2844 | ||
2845 | if (state->left_to_receive == 0) { | |
2846 | /* Short-circuit for payload-less commands. */ | |
2847 | goto reception_complete; | |
2848 | } | |
2849 | ||
2850 | ret = conn->sock->ops->recvmsg(conn->sock, | |
2851 | reception_buffer->data + state->received, | |
2852 | state->left_to_receive, MSG_DONTWAIT); | |
2853 | if (ret < 0) { | |
5569b118 JG |
2854 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
2855 | PERROR("Unable to receive command payload on sock %d", | |
2856 | conn->sock->fd); | |
2857 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2858 | } | |
5312a3ed JG |
2859 | goto end; |
2860 | } else if (ret == 0) { | |
2861 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 2862 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
2863 | goto end; |
2864 | } | |
2865 | ||
2866 | assert(ret > 0); | |
2867 | assert(ret <= state->left_to_receive); | |
2868 | ||
2869 | state->left_to_receive -= ret; | |
2870 | state->received += ret; | |
2871 | ||
2872 | if (state->left_to_receive > 0) { | |
2873 | /* | |
2874 | * Can't transition to the protocol's next state, wait to | |
2875 | * receive the rest of the header. | |
2876 | */ | |
2877 | DBG3("Partial reception of control connection protocol payload (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
2878 | state->received, state->left_to_receive, | |
2879 | conn->sock->fd); | |
5312a3ed JG |
2880 | goto end; |
2881 | } | |
2882 | ||
2883 | reception_complete: | |
2884 | DBG("Done receiving control command payload: fd = %i, payload size = %" PRIu64 " bytes", | |
2885 | conn->sock->fd, state->received); | |
2886 | /* | |
2887 | * The payload required to process the command has been received. | |
2888 | * A view to the reception buffer is forwarded to the various | |
2889 | * commands and the state of the control is reset on success. | |
2890 | * | |
2891 | * Commands are responsible for sending their reply to the peer. | |
2892 | */ | |
2893 | payload_view = lttng_buffer_view_from_dynamic_buffer(reception_buffer, | |
2894 | 0, -1); | |
2895 | ret = relay_process_control_command(conn, | |
2896 | &state->header, &payload_view); | |
2897 | if (ret < 0) { | |
5569b118 | 2898 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
2899 | goto end; |
2900 | } | |
2901 | ||
2902 | ret = connection_reset_protocol_state(conn); | |
5569b118 JG |
2903 | if (ret) { |
2904 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2905 | } | |
5312a3ed | 2906 | end: |
5569b118 | 2907 | return status; |
5312a3ed JG |
2908 | } |
2909 | ||
5569b118 JG |
2910 | static enum relay_connection_status relay_process_control_receive_header( |
2911 | struct relay_connection *conn) | |
5312a3ed JG |
2912 | { |
2913 | int ret = 0; | |
5569b118 | 2914 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
2915 | struct lttcomm_relayd_hdr header; |
2916 | struct lttng_dynamic_buffer *reception_buffer = | |
2917 | &conn->protocol.ctrl.reception_buffer; | |
2918 | struct ctrl_connection_state_receive_header *state = | |
2919 | &conn->protocol.ctrl.state.receive_header; | |
2920 | ||
2921 | assert(state->left_to_receive != 0); | |
2922 | ||
2923 | ret = conn->sock->ops->recvmsg(conn->sock, | |
2924 | reception_buffer->data + state->received, | |
2925 | state->left_to_receive, MSG_DONTWAIT); | |
2926 | if (ret < 0) { | |
5569b118 JG |
2927 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
2928 | PERROR("Unable to receive control command header on sock %d", | |
2929 | conn->sock->fd); | |
2930 | status = RELAY_CONNECTION_STATUS_ERROR; | |
2931 | } | |
5312a3ed JG |
2932 | goto end; |
2933 | } else if (ret == 0) { | |
2934 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 2935 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
2936 | goto end; |
2937 | } | |
2938 | ||
2939 | assert(ret > 0); | |
2940 | assert(ret <= state->left_to_receive); | |
2941 | ||
2942 | state->left_to_receive -= ret; | |
2943 | state->received += ret; | |
2944 | ||
2945 | if (state->left_to_receive > 0) { | |
2946 | /* | |
2947 | * Can't transition to the protocol's next state, wait to | |
2948 | * receive the rest of the header. | |
2949 | */ | |
2950 | DBG3("Partial reception of control connection protocol header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
2951 | state->received, state->left_to_receive, | |
2952 | conn->sock->fd); | |
5312a3ed JG |
2953 | goto end; |
2954 | } | |
2955 | ||
2956 | /* Transition to next state: receiving the command's payload. */ | |
2957 | conn->protocol.ctrl.state_id = | |
2958 | CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
2959 | memcpy(&header, reception_buffer->data, sizeof(header)); | |
2960 | header.circuit_id = be64toh(header.circuit_id); | |
2961 | header.data_size = be64toh(header.data_size); | |
2962 | header.cmd = be32toh(header.cmd); | |
2963 | header.cmd_version = be32toh(header.cmd_version); | |
2964 | memcpy(&conn->protocol.ctrl.state.receive_payload.header, | |
2965 | &header, sizeof(header)); | |
2966 | ||
2967 | DBG("Done receiving control command header: fd = %i, cmd = %" PRIu32 ", cmd_version = %" PRIu32 ", payload size = %" PRIu64 " bytes", | |
2968 | conn->sock->fd, header.cmd, header.cmd_version, | |
2969 | header.data_size); | |
2970 | ||
715e6fb1 | 2971 | if (header.data_size > DEFAULT_NETWORK_RELAYD_CTRL_MAX_PAYLOAD_SIZE) { |
5312a3ed JG |
2972 | ERR("Command header indicates a payload (%" PRIu64 " bytes) that exceeds the maximal payload size allowed on a control connection.", |
2973 | header.data_size); | |
5569b118 | 2974 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
2975 | goto end; |
2976 | } | |
2977 | ||
2978 | conn->protocol.ctrl.state.receive_payload.left_to_receive = | |
2979 | header.data_size; | |
2980 | conn->protocol.ctrl.state.receive_payload.received = 0; | |
2981 | ret = lttng_dynamic_buffer_set_size(reception_buffer, | |
2982 | header.data_size); | |
2983 | if (ret) { | |
5569b118 | 2984 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
2985 | goto end; |
2986 | } | |
2987 | ||
2988 | if (header.data_size == 0) { | |
2989 | /* | |
2990 | * Manually invoke the next state as the poll loop | |
2991 | * will not wake-up to allow us to proceed further. | |
2992 | */ | |
5569b118 | 2993 | status = relay_process_control_receive_payload(conn); |
5312a3ed JG |
2994 | } |
2995 | end: | |
5569b118 | 2996 | return status; |
5312a3ed JG |
2997 | } |
2998 | ||
2999 | /* | |
3000 | * Process the commands received on the control socket | |
3001 | */ | |
5569b118 JG |
3002 | static enum relay_connection_status relay_process_control( |
3003 | struct relay_connection *conn) | |
5312a3ed | 3004 | { |
5569b118 | 3005 | enum relay_connection_status status; |
5312a3ed JG |
3006 | |
3007 | switch (conn->protocol.ctrl.state_id) { | |
3008 | case CTRL_CONNECTION_STATE_RECEIVE_HEADER: | |
5569b118 | 3009 | status = relay_process_control_receive_header(conn); |
5312a3ed JG |
3010 | break; |
3011 | case CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
5569b118 | 3012 | status = relay_process_control_receive_payload(conn); |
5312a3ed JG |
3013 | break; |
3014 | default: | |
3015 | ERR("Unknown control connection protocol state encountered."); | |
3016 | abort(); | |
3017 | } | |
3018 | ||
5569b118 | 3019 | return status; |
5312a3ed JG |
3020 | } |
3021 | ||
5569b118 JG |
3022 | static enum relay_connection_status relay_process_data_receive_header( |
3023 | struct relay_connection *conn) | |
b8aa1682 | 3024 | { |
5312a3ed | 3025 | int ret; |
5569b118 | 3026 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3027 | struct data_connection_state_receive_header *state = |
3028 | &conn->protocol.data.state.receive_header; | |
3029 | struct lttcomm_relayd_data_hdr header; | |
b8aa1682 | 3030 | struct relay_stream *stream; |
5312a3ed JG |
3031 | |
3032 | assert(state->left_to_receive != 0); | |
3033 | ||
3034 | ret = conn->sock->ops->recvmsg(conn->sock, | |
3035 | state->header_reception_buffer + state->received, | |
3036 | state->left_to_receive, MSG_DONTWAIT); | |
3037 | if (ret < 0) { | |
5569b118 JG |
3038 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
3039 | PERROR("Unable to receive data header on sock %d", conn->sock->fd); | |
3040 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3041 | } | |
5312a3ed JG |
3042 | goto end; |
3043 | } else if (ret == 0) { | |
3044 | /* Orderly shutdown. Not necessary to print an error. */ | |
3045 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3046 | status = RELAY_CONNECTION_STATUS_CLOSED; |
b8aa1682 JD |
3047 | goto end; |
3048 | } | |
3049 | ||
5312a3ed JG |
3050 | assert(ret > 0); |
3051 | assert(ret <= state->left_to_receive); | |
3052 | ||
3053 | state->left_to_receive -= ret; | |
3054 | state->received += ret; | |
3055 | ||
3056 | if (state->left_to_receive > 0) { | |
3057 | /* | |
3058 | * Can't transition to the protocol's next state, wait to | |
3059 | * receive the rest of the header. | |
3060 | */ | |
3061 | DBG3("Partial reception of data connection header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3062 | state->received, state->left_to_receive, | |
3063 | conn->sock->fd); | |
7591bab1 | 3064 | goto end; |
b8aa1682 | 3065 | } |
b8aa1682 | 3066 | |
5312a3ed JG |
3067 | /* Transition to next state: receiving the payload. */ |
3068 | conn->protocol.data.state_id = DATA_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
173af62f | 3069 | |
5312a3ed JG |
3070 | memcpy(&header, state->header_reception_buffer, sizeof(header)); |
3071 | header.circuit_id = be64toh(header.circuit_id); | |
3072 | header.stream_id = be64toh(header.stream_id); | |
3073 | header.data_size = be32toh(header.data_size); | |
3074 | header.net_seq_num = be64toh(header.net_seq_num); | |
3075 | header.padding_size = be32toh(header.padding_size); | |
3076 | memcpy(&conn->protocol.data.state.receive_payload.header, &header, sizeof(header)); | |
3077 | ||
3078 | conn->protocol.data.state.receive_payload.left_to_receive = | |
3079 | header.data_size; | |
3080 | conn->protocol.data.state.receive_payload.received = 0; | |
3081 | conn->protocol.data.state.receive_payload.rotate_index = false; | |
3082 | ||
3083 | DBG("Received data connection header on fd %i: circuit_id = %" PRIu64 ", stream_id = %" PRIu64 ", data_size = %" PRIu32 ", net_seq_num = %" PRIu64 ", padding_size = %" PRIu32, | |
3084 | conn->sock->fd, header.circuit_id, | |
3085 | header.stream_id, header.data_size, | |
3086 | header.net_seq_num, header.padding_size); | |
3087 | ||
3088 | stream = stream_get_by_id(header.stream_id); | |
3089 | if (!stream) { | |
3090 | DBG("relay_process_data_receive_payload: Cannot find stream %" PRIu64, | |
3091 | header.stream_id); | |
5569b118 JG |
3092 | /* Protocol error. */ |
3093 | status = RELAY_CONNECTION_STATUS_ERROR; | |
5312a3ed JG |
3094 | goto end; |
3095 | } | |
b8aa1682 | 3096 | |
7591bab1 | 3097 | pthread_mutex_lock(&stream->lock); |
c35f9726 JG |
3098 | /* Prepare stream for the reception of a new packet. */ |
3099 | ret = stream_init_packet(stream, header.data_size, | |
3100 | &conn->protocol.data.state.receive_payload.rotate_index); | |
3101 | pthread_mutex_unlock(&stream->lock); | |
3102 | if (ret) { | |
3103 | ERR("Failed to rotate stream output file"); | |
3104 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3105 | goto end_stream_unlock; | |
1c20f0e2 JD |
3106 | } |
3107 | ||
5312a3ed | 3108 | end_stream_unlock: |
5312a3ed JG |
3109 | stream_put(stream); |
3110 | end: | |
5569b118 | 3111 | return status; |
5312a3ed JG |
3112 | } |
3113 | ||
5569b118 JG |
3114 | static enum relay_connection_status relay_process_data_receive_payload( |
3115 | struct relay_connection *conn) | |
5312a3ed JG |
3116 | { |
3117 | int ret; | |
5569b118 | 3118 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3119 | struct relay_stream *stream; |
3120 | struct data_connection_state_receive_payload *state = | |
3121 | &conn->protocol.data.state.receive_payload; | |
3122 | const size_t chunk_size = RECV_DATA_BUFFER_SIZE; | |
3123 | char data_buffer[chunk_size]; | |
3124 | bool partial_recv = false; | |
3125 | bool new_stream = false, close_requested = false, index_flushed = false; | |
3126 | uint64_t left_to_receive = state->left_to_receive; | |
3127 | struct relay_session *session; | |
3128 | ||
fd0f1e3e JR |
3129 | DBG3("Receiving data for stream id %" PRIu64 " seqnum %" PRIu64 ", %" PRIu64" bytes received, %" PRIu64 " bytes left to receive", |
3130 | state->header.stream_id, state->header.net_seq_num, | |
3131 | state->received, left_to_receive); | |
3132 | ||
5312a3ed JG |
3133 | stream = stream_get_by_id(state->header.stream_id); |
3134 | if (!stream) { | |
5569b118 | 3135 | /* Protocol error. */ |
fd0f1e3e | 3136 | ERR("relay_process_data_receive_payload: cannot find stream %" PRIu64, |
5312a3ed | 3137 | state->header.stream_id); |
5569b118 | 3138 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed | 3139 | goto end; |
1c20f0e2 JD |
3140 | } |
3141 | ||
5312a3ed JG |
3142 | pthread_mutex_lock(&stream->lock); |
3143 | session = stream->trace->session; | |
fd0f1e3e JR |
3144 | if (!conn->session) { |
3145 | ret = connection_set_session(conn, session); | |
3146 | if (ret) { | |
3147 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3148 | goto end_stream_unlock; | |
3149 | } | |
3150 | } | |
5312a3ed JG |
3151 | |
3152 | /* | |
3153 | * The size of the "chunk" received on any iteration is bounded by: | |
3154 | * - the data left to receive, | |
3155 | * - the data immediately available on the socket, | |
3156 | * - the on-stack data buffer | |
3157 | */ | |
3158 | while (left_to_receive > 0 && !partial_recv) { | |
5312a3ed | 3159 | size_t recv_size = min(left_to_receive, chunk_size); |
c35f9726 | 3160 | struct lttng_buffer_view packet_chunk; |
5312a3ed JG |
3161 | |
3162 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, | |
3163 | recv_size, MSG_DONTWAIT); | |
3164 | if (ret < 0) { | |
5569b118 JG |
3165 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
3166 | PERROR("Socket %d error", conn->sock->fd); | |
3167 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3168 | } | |
0848dba7 | 3169 | goto end_stream_unlock; |
5312a3ed JG |
3170 | } else if (ret == 0) { |
3171 | /* No more data ready to be consumed on socket. */ | |
3172 | DBG3("No more data ready for consumption on data socket of stream id %" PRIu64, | |
3173 | state->header.stream_id); | |
5569b118 | 3174 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3175 | break; |
3176 | } else if (ret < (int) recv_size) { | |
3177 | /* | |
3178 | * All the data available on the socket has been | |
3179 | * consumed. | |
3180 | */ | |
3181 | partial_recv = true; | |
c35f9726 | 3182 | recv_size = ret; |
0848dba7 MD |
3183 | } |
3184 | ||
c35f9726 JG |
3185 | packet_chunk = lttng_buffer_view_init(data_buffer, |
3186 | 0, recv_size); | |
3187 | assert(packet_chunk.data); | |
5312a3ed | 3188 | |
c35f9726 JG |
3189 | ret = stream_write(stream, &packet_chunk, 0); |
3190 | if (ret) { | |
0848dba7 | 3191 | ERR("Relay error writing data to file"); |
5569b118 | 3192 | status = RELAY_CONNECTION_STATUS_ERROR; |
0848dba7 MD |
3193 | goto end_stream_unlock; |
3194 | } | |
3195 | ||
5312a3ed JG |
3196 | left_to_receive -= recv_size; |
3197 | state->received += recv_size; | |
3198 | state->left_to_receive = left_to_receive; | |
5312a3ed JG |
3199 | } |
3200 | ||
3201 | if (state->left_to_receive > 0) { | |
3202 | /* | |
3203 | * Did not receive all the data expected, wait for more data to | |
3204 | * become available on the socket. | |
3205 | */ | |
3206 | DBG3("Partial receive on data connection of stream id %" PRIu64 ", %" PRIu64 " bytes received, %" PRIu64 " bytes left to receive", | |
3207 | state->header.stream_id, state->received, | |
3208 | state->left_to_receive); | |
5312a3ed | 3209 | goto end_stream_unlock; |
0848dba7 | 3210 | } |
5ab7344e | 3211 | |
c35f9726 JG |
3212 | ret = stream_write(stream, NULL, state->header.padding_size); |
3213 | if (ret) { | |
5569b118 | 3214 | status = RELAY_CONNECTION_STATUS_ERROR; |
7591bab1 | 3215 | goto end_stream_unlock; |
1d4dfdef | 3216 | } |
5312a3ed | 3217 | |
298a25ca | 3218 | if (session_streams_have_index(session)) { |
c35f9726 JG |
3219 | ret = stream_update_index(stream, state->header.net_seq_num, |
3220 | state->rotate_index, &index_flushed, | |
3221 | state->header.data_size + state->header.padding_size); | |
5312a3ed | 3222 | if (ret < 0) { |
c35f9726 | 3223 | ERR("Failed to update index: stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
5312a3ed JG |
3224 | stream->stream_handle, |
3225 | state->header.net_seq_num, ret); | |
5569b118 | 3226 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3227 | goto end_stream_unlock; |
3228 | } | |
3229 | } | |
3230 | ||
a8f9f353 | 3231 | if (stream->prev_data_seq == -1ULL) { |
c0bae11d MD |
3232 | new_stream = true; |
3233 | } | |
3234 | ||
c35f9726 JG |
3235 | ret = stream_complete_packet(stream, state->header.data_size + |
3236 | state->header.padding_size, state->header.net_seq_num, | |
3237 | index_flushed); | |
3238 | if (ret) { | |
3239 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3240 | goto end_stream_unlock; | |
3241 | } | |
5312a3ed JG |
3242 | |
3243 | /* | |
3244 | * Resetting the protocol state (to RECEIVE_HEADER) will trash the | |
3245 | * contents of *state which are aliased (union) to the same location as | |
3246 | * the new state. Don't use it beyond this point. | |
3247 | */ | |
3248 | connection_reset_protocol_state(conn); | |
3249 | state = NULL; | |
173af62f | 3250 | |
7591bab1 | 3251 | end_stream_unlock: |
bda7c7b9 | 3252 | close_requested = stream->close_requested; |
7591bab1 | 3253 | pthread_mutex_unlock(&stream->lock); |
5312a3ed | 3254 | if (close_requested && left_to_receive == 0) { |
bda7c7b9 JG |
3255 | try_stream_close(stream); |
3256 | } | |
3257 | ||
c0bae11d MD |
3258 | if (new_stream) { |
3259 | pthread_mutex_lock(&session->lock); | |
3260 | uatomic_set(&session->new_streams, 1); | |
3261 | pthread_mutex_unlock(&session->lock); | |
3262 | } | |
5312a3ed | 3263 | |
7591bab1 | 3264 | stream_put(stream); |
b8aa1682 | 3265 | end: |
5569b118 | 3266 | return status; |
b8aa1682 JD |
3267 | } |
3268 | ||
5312a3ed JG |
3269 | /* |
3270 | * relay_process_data: Process the data received on the data socket | |
3271 | */ | |
5569b118 JG |
3272 | static enum relay_connection_status relay_process_data( |
3273 | struct relay_connection *conn) | |
5312a3ed | 3274 | { |
5569b118 | 3275 | enum relay_connection_status status; |
5312a3ed JG |
3276 | |
3277 | switch (conn->protocol.data.state_id) { | |
3278 | case DATA_CONNECTION_STATE_RECEIVE_HEADER: | |
5569b118 | 3279 | status = relay_process_data_receive_header(conn); |
5312a3ed JG |
3280 | break; |
3281 | case DATA_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
5569b118 | 3282 | status = relay_process_data_receive_payload(conn); |
5312a3ed JG |
3283 | break; |
3284 | default: | |
3285 | ERR("Unexpected data connection communication state."); | |
3286 | abort(); | |
3287 | } | |
3288 | ||
5569b118 | 3289 | return status; |
5312a3ed JG |
3290 | } |
3291 | ||
7591bab1 | 3292 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
3293 | { |
3294 | int ret; | |
3295 | ||
58eb9381 | 3296 | (void) lttng_poll_del(events, pollfd); |
b8aa1682 JD |
3297 | |
3298 | ret = close(pollfd); | |
3299 | if (ret < 0) { | |
3300 | ERR("Closing pollfd %d", pollfd); | |
3301 | } | |
3302 | } | |
3303 | ||
7591bab1 MD |
3304 | static void relay_thread_close_connection(struct lttng_poll_event *events, |
3305 | int pollfd, struct relay_connection *conn) | |
9d1bbf21 | 3306 | { |
7591bab1 | 3307 | const char *type_str; |
2a174661 | 3308 | |
7591bab1 MD |
3309 | switch (conn->type) { |
3310 | case RELAY_DATA: | |
3311 | type_str = "Data"; | |
3312 | break; | |
3313 | case RELAY_CONTROL: | |
3314 | type_str = "Control"; | |
3315 | break; | |
3316 | case RELAY_VIEWER_COMMAND: | |
3317 | type_str = "Viewer Command"; | |
3318 | break; | |
3319 | case RELAY_VIEWER_NOTIFICATION: | |
3320 | type_str = "Viewer Notification"; | |
3321 | break; | |
3322 | default: | |
3323 | type_str = "Unknown"; | |
9d1bbf21 | 3324 | } |
7591bab1 MD |
3325 | cleanup_connection_pollfd(events, pollfd); |
3326 | connection_put(conn); | |
3327 | DBG("%s connection closed with %d", type_str, pollfd); | |
b8aa1682 JD |
3328 | } |
3329 | ||
3330 | /* | |
3331 | * This thread does the actual work | |
3332 | */ | |
7591bab1 | 3333 | static void *relay_thread_worker(void *data) |
b8aa1682 | 3334 | { |
beaad64c DG |
3335 | int ret, err = -1, last_seen_data_fd = -1; |
3336 | uint32_t nb_fd; | |
b8aa1682 JD |
3337 | struct lttng_poll_event events; |
3338 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 3339 | struct lttng_ht_iter iter; |
90e7d72f | 3340 | struct relay_connection *destroy_conn = NULL; |
b8aa1682 JD |
3341 | |
3342 | DBG("[thread] Relay worker started"); | |
3343 | ||
9d1bbf21 MD |
3344 | rcu_register_thread(); |
3345 | ||
55706a7d MD |
3346 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
3347 | ||
9b5e0863 MD |
3348 | if (testpoint(relayd_thread_worker)) { |
3349 | goto error_testpoint; | |
3350 | } | |
3351 | ||
f385ae0a MD |
3352 | health_code_update(); |
3353 | ||
b8aa1682 JD |
3354 | /* table of connections indexed on socket */ |
3355 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
3356 | if (!relay_connections_ht) { |
3357 | goto relay_connections_ht_error; | |
3358 | } | |
b8aa1682 | 3359 | |
b8aa1682 JD |
3360 | ret = create_thread_poll_set(&events, 2); |
3361 | if (ret < 0) { | |
3362 | goto error_poll_create; | |
3363 | } | |
3364 | ||
58eb9381 | 3365 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
3366 | if (ret < 0) { |
3367 | goto error; | |
3368 | } | |
3369 | ||
beaad64c | 3370 | restart: |
b8aa1682 | 3371 | while (1) { |
beaad64c DG |
3372 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
3373 | ||
f385ae0a MD |
3374 | health_code_update(); |
3375 | ||
b8aa1682 | 3376 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 3377 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 3378 | health_poll_entry(); |
b8aa1682 | 3379 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 3380 | health_poll_exit(); |
b8aa1682 JD |
3381 | if (ret < 0) { |
3382 | /* | |
3383 | * Restart interrupted system call. | |
3384 | */ | |
3385 | if (errno == EINTR) { | |
3386 | goto restart; | |
3387 | } | |
3388 | goto error; | |
3389 | } | |
3390 | ||
0d9c5d77 DG |
3391 | nb_fd = ret; |
3392 | ||
beaad64c | 3393 | /* |
7591bab1 MD |
3394 | * Process control. The control connection is |
3395 | * prioritized so we don't starve it with high | |
3396 | * throughput tracing data on the data connection. | |
beaad64c | 3397 | */ |
b8aa1682 JD |
3398 | for (i = 0; i < nb_fd; i++) { |
3399 | /* Fetch once the poll data */ | |
beaad64c DG |
3400 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
3401 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 3402 | |
f385ae0a MD |
3403 | health_code_update(); |
3404 | ||
b8aa1682 JD |
3405 | /* Thread quit pipe has been closed. Killing thread. */ |
3406 | ret = check_thread_quit_pipe(pollfd, revents); | |
3407 | if (ret) { | |
095a4ae5 MD |
3408 | err = 0; |
3409 | goto exit; | |
b8aa1682 JD |
3410 | } |
3411 | ||
58eb9381 DG |
3412 | /* Inspect the relay conn pipe for new connection */ |
3413 | if (pollfd == relay_conn_pipe[0]) { | |
03e43155 | 3414 | if (revents & LPOLLIN) { |
90e7d72f JG |
3415 | struct relay_connection *conn; |
3416 | ||
58eb9381 | 3417 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
3418 | if (ret < 0) { |
3419 | goto error; | |
3420 | } | |
73039936 FD |
3421 | ret = lttng_poll_add(&events, |
3422 | conn->sock->fd, | |
58eb9381 | 3423 | LPOLLIN | LPOLLRDHUP); |
73039936 FD |
3424 | if (ret) { |
3425 | ERR("Failed to add new connection file descriptor to poll set"); | |
3426 | goto error; | |
3427 | } | |
7591bab1 | 3428 | connection_ht_add(relay_connections_ht, conn); |
58eb9381 | 3429 | DBG("Connection socket %d added", conn->sock->fd); |
03e43155 MD |
3430 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3431 | ERR("Relay connection pipe error"); | |
3432 | goto error; | |
3433 | } else { | |
3434 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
3435 | goto error; | |
b8aa1682 | 3436 | } |
58eb9381 | 3437 | } else { |
90e7d72f JG |
3438 | struct relay_connection *ctrl_conn; |
3439 | ||
7591bab1 | 3440 | ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
58eb9381 | 3441 | /* If not found, there is a synchronization issue. */ |
90e7d72f | 3442 | assert(ctrl_conn); |
58eb9381 | 3443 | |
03e43155 MD |
3444 | if (ctrl_conn->type == RELAY_DATA) { |
3445 | if (revents & LPOLLIN) { | |
beaad64c DG |
3446 | /* |
3447 | * Flag the last seen data fd not deleted. It will be | |
3448 | * used as the last seen fd if any fd gets deleted in | |
3449 | * this first loop. | |
3450 | */ | |
3451 | last_notdel_data_fd = pollfd; | |
3452 | } | |
03e43155 MD |
3453 | goto put_ctrl_connection; |
3454 | } | |
3455 | assert(ctrl_conn->type == RELAY_CONTROL); | |
3456 | ||
3457 | if (revents & LPOLLIN) { | |
5569b118 JG |
3458 | enum relay_connection_status status; |
3459 | ||
3460 | status = relay_process_control(ctrl_conn); | |
3461 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
fd0f1e3e JR |
3462 | /* |
3463 | * On socket error flag the session as aborted to force | |
3464 | * the cleanup of its stream otherwise it can leak | |
3465 | * during the lifetime of the relayd. | |
3466 | * | |
3467 | * This prevents situations in which streams can be | |
3468 | * left opened because an index was received, the | |
3469 | * control connection is closed, and the data | |
3470 | * connection is closed (uncleanly) before the packet's | |
3471 | * data provided. | |
3472 | * | |
3473 | * Since the control connection encountered an error, | |
3474 | * it is okay to be conservative and close the | |
3475 | * session right now as we can't rely on the protocol | |
3476 | * being respected anymore. | |
3477 | */ | |
3478 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
3479 | session_abort(ctrl_conn->session); | |
3480 | } | |
3481 | ||
5569b118 | 3482 | /* Clear the connection on error or close. */ |
5312a3ed JG |
3483 | relay_thread_close_connection(&events, |
3484 | pollfd, | |
03e43155 | 3485 | ctrl_conn); |
03e43155 | 3486 | } |
5312a3ed | 3487 | seen_control = 1; |
03e43155 MD |
3488 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3489 | relay_thread_close_connection(&events, | |
3490 | pollfd, ctrl_conn); | |
3491 | if (last_seen_data_fd == pollfd) { | |
3492 | last_seen_data_fd = last_notdel_data_fd; | |
3493 | } | |
58eb9381 | 3494 | } else { |
03e43155 MD |
3495 | ERR("Unexpected poll events %u for control sock %d", |
3496 | revents, pollfd); | |
3497 | connection_put(ctrl_conn); | |
3498 | goto error; | |
beaad64c | 3499 | } |
03e43155 | 3500 | put_ctrl_connection: |
7591bab1 | 3501 | connection_put(ctrl_conn); |
beaad64c DG |
3502 | } |
3503 | } | |
3504 | ||
3505 | /* | |
3506 | * The last loop handled a control request, go back to poll to make | |
3507 | * sure we prioritise the control socket. | |
3508 | */ | |
3509 | if (seen_control) { | |
3510 | continue; | |
3511 | } | |
3512 | ||
3513 | if (last_seen_data_fd >= 0) { | |
3514 | for (i = 0; i < nb_fd; i++) { | |
3515 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
3516 | |
3517 | health_code_update(); | |
3518 | ||
beaad64c DG |
3519 | if (last_seen_data_fd == pollfd) { |
3520 | idx = i; | |
3521 | break; | |
3522 | } | |
3523 | } | |
3524 | } | |
3525 | ||
3526 | /* Process data connection. */ | |
3527 | for (i = idx + 1; i < nb_fd; i++) { | |
3528 | /* Fetch the poll data. */ | |
3529 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
3530 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
90e7d72f | 3531 | struct relay_connection *data_conn; |
beaad64c | 3532 | |
f385ae0a MD |
3533 | health_code_update(); |
3534 | ||
fd20dac9 MD |
3535 | if (!revents) { |
3536 | /* No activity for this FD (poll implementation). */ | |
3537 | continue; | |
3538 | } | |
3539 | ||
beaad64c | 3540 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 3541 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
3542 | continue; |
3543 | } | |
3544 | ||
7591bab1 | 3545 | data_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
90e7d72f | 3546 | if (!data_conn) { |
fd20dac9 | 3547 | /* Skip it. Might be removed before. */ |
fd20dac9 MD |
3548 | continue; |
3549 | } | |
03e43155 MD |
3550 | if (data_conn->type == RELAY_CONTROL) { |
3551 | goto put_data_connection; | |
3552 | } | |
3553 | assert(data_conn->type == RELAY_DATA); | |
fd20dac9 MD |
3554 | |
3555 | if (revents & LPOLLIN) { | |
5569b118 JG |
3556 | enum relay_connection_status status; |
3557 | ||
3558 | status = relay_process_data(data_conn); | |
3559 | /* Connection closed or error. */ | |
3560 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
fd0f1e3e JR |
3561 | /* |
3562 | * On socket error flag the session as aborted to force | |
3563 | * the cleanup of its stream otherwise it can leak | |
3564 | * during the lifetime of the relayd. | |
3565 | * | |
3566 | * This prevents situations in which streams can be | |
3567 | * left opened because an index was received, the | |
3568 | * control connection is closed, and the data | |
3569 | * connection is closed (uncleanly) before the packet's | |
3570 | * data provided. | |
3571 | * | |
3572 | * Since the data connection encountered an error, | |
3573 | * it is okay to be conservative and close the | |
3574 | * session right now as we can't rely on the protocol | |
3575 | * being respected anymore. | |
3576 | */ | |
3577 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
3578 | session_abort(data_conn->session); | |
3579 | } | |
7591bab1 | 3580 | relay_thread_close_connection(&events, pollfd, |
03e43155 | 3581 | data_conn); |
fd20dac9 MD |
3582 | /* |
3583 | * Every goto restart call sets the last seen fd where | |
3584 | * here we don't really care since we gracefully | |
3585 | * continue the loop after the connection is deleted. | |
3586 | */ | |
3587 | } else { | |
3588 | /* Keep last seen port. */ | |
3589 | last_seen_data_fd = pollfd; | |
7591bab1 | 3590 | connection_put(data_conn); |
fd20dac9 | 3591 | goto restart; |
b8aa1682 | 3592 | } |
03e43155 MD |
3593 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3594 | relay_thread_close_connection(&events, pollfd, | |
3595 | data_conn); | |
3596 | } else { | |
3597 | ERR("Unknown poll events %u for data sock %d", | |
3598 | revents, pollfd); | |
b8aa1682 | 3599 | } |
03e43155 | 3600 | put_data_connection: |
7591bab1 | 3601 | connection_put(data_conn); |
b8aa1682 | 3602 | } |
beaad64c | 3603 | last_seen_data_fd = -1; |
b8aa1682 JD |
3604 | } |
3605 | ||
f385ae0a MD |
3606 | /* Normal exit, no error */ |
3607 | ret = 0; | |
3608 | ||
095a4ae5 | 3609 | exit: |
b8aa1682 | 3610 | error: |
71efa8ef | 3611 | /* Cleanup remaining connection object. */ |
9d1bbf21 | 3612 | rcu_read_lock(); |
90e7d72f JG |
3613 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, |
3614 | destroy_conn, | |
58eb9381 | 3615 | sock_n.node) { |
f385ae0a | 3616 | health_code_update(); |
98ba050e | 3617 | |
fd0f1e3e | 3618 | session_abort(destroy_conn->session); |
98ba050e | 3619 | |
7591bab1 MD |
3620 | /* |
3621 | * No need to grab another ref, because we own | |
3622 | * destroy_conn. | |
3623 | */ | |
3624 | relay_thread_close_connection(&events, destroy_conn->sock->fd, | |
3625 | destroy_conn); | |
b8aa1682 | 3626 | } |
94d49140 | 3627 | rcu_read_unlock(); |
7591bab1 MD |
3628 | |
3629 | lttng_poll_clean(&events); | |
7d2f7452 | 3630 | error_poll_create: |
b8aa1682 | 3631 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 3632 | relay_connections_ht_error: |
58eb9381 DG |
3633 | /* Close relay conn pipes */ |
3634 | utils_close_pipe(relay_conn_pipe); | |
095a4ae5 MD |
3635 | if (err) { |
3636 | DBG("Thread exited with error"); | |
3637 | } | |
b8aa1682 | 3638 | DBG("Worker thread cleanup complete"); |
9b5e0863 | 3639 | error_testpoint: |
f385ae0a MD |
3640 | if (err) { |
3641 | health_error(); | |
3642 | ERR("Health error occurred in %s", __func__); | |
3643 | } | |
3644 | health_unregister(health_relayd); | |
9d1bbf21 | 3645 | rcu_unregister_thread(); |
b4aacfdc | 3646 | lttng_relay_stop_threads(); |
b8aa1682 JD |
3647 | return NULL; |
3648 | } | |
3649 | ||
3650 | /* | |
3651 | * Create the relay command pipe to wake thread_manage_apps. | |
3652 | * Closed in cleanup(). | |
3653 | */ | |
58eb9381 | 3654 | static int create_relay_conn_pipe(void) |
b8aa1682 | 3655 | { |
a02de639 | 3656 | int ret; |
b8aa1682 | 3657 | |
58eb9381 | 3658 | ret = utils_create_pipe_cloexec(relay_conn_pipe); |
b8aa1682 | 3659 | |
b8aa1682 JD |
3660 | return ret; |
3661 | } | |
3662 | ||
3663 | /* | |
3664 | * main | |
3665 | */ | |
3666 | int main(int argc, char **argv) | |
3667 | { | |
178a0557 | 3668 | int ret = 0, retval = 0; |
b8aa1682 JD |
3669 | void *status; |
3670 | ||
b8aa1682 JD |
3671 | /* Parse arguments */ |
3672 | progname = argv[0]; | |
178a0557 MD |
3673 | if (set_options(argc, argv)) { |
3674 | retval = -1; | |
3675 | goto exit_options; | |
b8aa1682 JD |
3676 | } |
3677 | ||
178a0557 MD |
3678 | if (set_signal_handler()) { |
3679 | retval = -1; | |
3680 | goto exit_options; | |
b8aa1682 JD |
3681 | } |
3682 | ||
a3bc3918 JR |
3683 | relayd_config_log(); |
3684 | ||
3685 | if (opt_print_version) { | |
3686 | print_version(); | |
3687 | retval = 0; | |
3688 | goto exit_options; | |
3689 | } | |
3690 | ||
4d513a50 DG |
3691 | /* Try to create directory if -o, --output is specified. */ |
3692 | if (opt_output_path) { | |
994fa64f DG |
3693 | if (*opt_output_path != '/') { |
3694 | ERR("Please specify an absolute path for -o, --output PATH"); | |
178a0557 MD |
3695 | retval = -1; |
3696 | goto exit_options; | |
994fa64f DG |
3697 | } |
3698 | ||
d77dded2 JG |
3699 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG, |
3700 | -1, -1); | |
4d513a50 DG |
3701 | if (ret < 0) { |
3702 | ERR("Unable to create %s", opt_output_path); | |
178a0557 MD |
3703 | retval = -1; |
3704 | goto exit_options; | |
4d513a50 DG |
3705 | } |
3706 | } | |
3707 | ||
b8aa1682 | 3708 | /* Daemonize */ |
b5218ffb | 3709 | if (opt_daemon || opt_background) { |
3fd27398 MD |
3710 | int i; |
3711 | ||
3712 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, | |
3713 | !opt_background); | |
b8aa1682 | 3714 | if (ret < 0) { |
178a0557 MD |
3715 | retval = -1; |
3716 | goto exit_options; | |
b8aa1682 | 3717 | } |
3fd27398 MD |
3718 | |
3719 | /* | |
3720 | * We are in the child. Make sure all other file | |
3721 | * descriptors are closed, in case we are called with | |
3722 | * more opened file descriptors than the standard ones. | |
3723 | */ | |
3724 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
3725 | (void) close(i); | |
3726 | } | |
3727 | } | |
3728 | ||
23c8ff50 JG |
3729 | sessiond_trace_chunk_registry = sessiond_trace_chunk_registry_create(); |
3730 | if (!sessiond_trace_chunk_registry) { | |
3731 | ERR("Failed to initialize session daemon trace chunk registry"); | |
3732 | retval = -1; | |
3733 | goto exit_sessiond_trace_chunk_registry; | |
3734 | } | |
3735 | ||
178a0557 MD |
3736 | /* Initialize thread health monitoring */ |
3737 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
3738 | if (!health_relayd) { | |
3739 | PERROR("health_app_create error"); | |
3740 | retval = -1; | |
3741 | goto exit_health_app_create; | |
3742 | } | |
3743 | ||
3fd27398 | 3744 | /* Create thread quit pipe */ |
178a0557 MD |
3745 | if (init_thread_quit_pipe()) { |
3746 | retval = -1; | |
3747 | goto exit_init_data; | |
b8aa1682 JD |
3748 | } |
3749 | ||
b8aa1682 | 3750 | /* Setup the thread apps communication pipe. */ |
178a0557 MD |
3751 | if (create_relay_conn_pipe()) { |
3752 | retval = -1; | |
3753 | goto exit_init_data; | |
b8aa1682 JD |
3754 | } |
3755 | ||
3756 | /* Init relay command queue. */ | |
8bdee6e2 | 3757 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 | 3758 | |
554831e7 MD |
3759 | /* Initialize communication library */ |
3760 | lttcomm_init(); | |
87e45c13 | 3761 | lttcomm_inet_init(); |
554831e7 | 3762 | |
d3e2ba59 | 3763 | /* tables of sessions indexed by session ID */ |
7591bab1 MD |
3764 | sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3765 | if (!sessions_ht) { | |
178a0557 MD |
3766 | retval = -1; |
3767 | goto exit_init_data; | |
d3e2ba59 JD |
3768 | } |
3769 | ||
3770 | /* tables of streams indexed by stream ID */ | |
2a174661 | 3771 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 | 3772 | if (!relay_streams_ht) { |
178a0557 MD |
3773 | retval = -1; |
3774 | goto exit_init_data; | |
d3e2ba59 JD |
3775 | } |
3776 | ||
3777 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
3778 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3779 | if (!viewer_streams_ht) { | |
178a0557 MD |
3780 | retval = -1; |
3781 | goto exit_init_data; | |
55706a7d MD |
3782 | } |
3783 | ||
65931c8b | 3784 | ret = utils_create_pipe(health_quit_pipe); |
178a0557 MD |
3785 | if (ret) { |
3786 | retval = -1; | |
3787 | goto exit_health_quit_pipe; | |
65931c8b MD |
3788 | } |
3789 | ||
3790 | /* Create thread to manage the client socket */ | |
1a1a34b4 | 3791 | ret = pthread_create(&health_thread, default_pthread_attr(), |
65931c8b | 3792 | thread_manage_health, (void *) NULL); |
178a0557 MD |
3793 | if (ret) { |
3794 | errno = ret; | |
65931c8b | 3795 | PERROR("pthread_create health"); |
178a0557 MD |
3796 | retval = -1; |
3797 | goto exit_health_thread; | |
65931c8b MD |
3798 | } |
3799 | ||
b8aa1682 | 3800 | /* Setup the dispatcher thread */ |
1a1a34b4 | 3801 | ret = pthread_create(&dispatcher_thread, default_pthread_attr(), |
b8aa1682 | 3802 | relay_thread_dispatcher, (void *) NULL); |
178a0557 MD |
3803 | if (ret) { |
3804 | errno = ret; | |
b8aa1682 | 3805 | PERROR("pthread_create dispatcher"); |
178a0557 MD |
3806 | retval = -1; |
3807 | goto exit_dispatcher_thread; | |
b8aa1682 JD |
3808 | } |
3809 | ||
3810 | /* Setup the worker thread */ | |
1a1a34b4 | 3811 | ret = pthread_create(&worker_thread, default_pthread_attr(), |
7591bab1 | 3812 | relay_thread_worker, NULL); |
178a0557 MD |
3813 | if (ret) { |
3814 | errno = ret; | |
b8aa1682 | 3815 | PERROR("pthread_create worker"); |
178a0557 MD |
3816 | retval = -1; |
3817 | goto exit_worker_thread; | |
b8aa1682 JD |
3818 | } |
3819 | ||
3820 | /* Setup the listener thread */ | |
1a1a34b4 | 3821 | ret = pthread_create(&listener_thread, default_pthread_attr(), |
b8aa1682 | 3822 | relay_thread_listener, (void *) NULL); |
178a0557 MD |
3823 | if (ret) { |
3824 | errno = ret; | |
b8aa1682 | 3825 | PERROR("pthread_create listener"); |
178a0557 MD |
3826 | retval = -1; |
3827 | goto exit_listener_thread; | |
b8aa1682 JD |
3828 | } |
3829 | ||
7591bab1 | 3830 | ret = relayd_live_create(live_uri); |
178a0557 | 3831 | if (ret) { |
d3e2ba59 | 3832 | ERR("Starting live viewer threads"); |
178a0557 | 3833 | retval = -1; |
50138f51 | 3834 | goto exit_live; |
d3e2ba59 JD |
3835 | } |
3836 | ||
178a0557 MD |
3837 | /* |
3838 | * This is where we start awaiting program completion (e.g. through | |
3839 | * signal that asks threads to teardown). | |
3840 | */ | |
3841 | ||
3842 | ret = relayd_live_join(); | |
3843 | if (ret) { | |
3844 | retval = -1; | |
3845 | } | |
50138f51 | 3846 | exit_live: |
178a0557 | 3847 | |
b8aa1682 | 3848 | ret = pthread_join(listener_thread, &status); |
178a0557 MD |
3849 | if (ret) { |
3850 | errno = ret; | |
3851 | PERROR("pthread_join listener_thread"); | |
3852 | retval = -1; | |
b8aa1682 JD |
3853 | } |
3854 | ||
178a0557 | 3855 | exit_listener_thread: |
b8aa1682 | 3856 | ret = pthread_join(worker_thread, &status); |
178a0557 MD |
3857 | if (ret) { |
3858 | errno = ret; | |
3859 | PERROR("pthread_join worker_thread"); | |
3860 | retval = -1; | |
b8aa1682 JD |
3861 | } |
3862 | ||
178a0557 | 3863 | exit_worker_thread: |
b8aa1682 | 3864 | ret = pthread_join(dispatcher_thread, &status); |
178a0557 MD |
3865 | if (ret) { |
3866 | errno = ret; | |
3867 | PERROR("pthread_join dispatcher_thread"); | |
3868 | retval = -1; | |
b8aa1682 | 3869 | } |
178a0557 | 3870 | exit_dispatcher_thread: |
42415026 | 3871 | |
65931c8b | 3872 | ret = pthread_join(health_thread, &status); |
178a0557 MD |
3873 | if (ret) { |
3874 | errno = ret; | |
3875 | PERROR("pthread_join health_thread"); | |
3876 | retval = -1; | |
65931c8b | 3877 | } |
178a0557 | 3878 | exit_health_thread: |
65931c8b | 3879 | |
65931c8b | 3880 | utils_close_pipe(health_quit_pipe); |
178a0557 | 3881 | exit_health_quit_pipe: |
65931c8b | 3882 | |
178a0557 | 3883 | exit_init_data: |
55706a7d | 3884 | health_app_destroy(health_relayd); |
23c8ff50 | 3885 | sessiond_trace_chunk_registry_destroy(sessiond_trace_chunk_registry); |
55706a7d | 3886 | exit_health_app_create: |
23c8ff50 | 3887 | exit_sessiond_trace_chunk_registry: |
178a0557 | 3888 | exit_options: |
4d62fbf8 MD |
3889 | /* |
3890 | * Wait for all pending call_rcu work to complete before tearing | |
3891 | * down data structures. call_rcu worker may be trying to | |
3892 | * perform lookups in those structures. | |
3893 | */ | |
3894 | rcu_barrier(); | |
7591bab1 MD |
3895 | relayd_cleanup(); |
3896 | ||
3897 | /* Ensure all prior call_rcu are done. */ | |
3898 | rcu_barrier(); | |
d3e2ba59 | 3899 | |
178a0557 | 3900 | if (!retval) { |
b8aa1682 | 3901 | exit(EXIT_SUCCESS); |
178a0557 MD |
3902 | } else { |
3903 | exit(EXIT_FAILURE); | |
b8aa1682 | 3904 | } |
b8aa1682 | 3905 | } |