Commit | Line | Data |
---|---|---|
b8aa1682 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2012 Julien Desfossez <jdesfossez@efficios.com> |
3 | * Copyright (C) 2012 David Goulet <dgoulet@efficios.com> | |
4 | * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
5 | * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
b8aa1682 | 6 | * |
ab5be9fa | 7 | * SPDX-License-Identifier: GPL-2.0-only |
b8aa1682 | 8 | * |
b8aa1682 JD |
9 | */ |
10 | ||
6c1c0768 | 11 | #define _LGPL_SOURCE |
c9e313bc SM |
12 | #include "backward-compatibility-group-by.hpp" |
13 | #include "cmd.hpp" | |
14 | #include "connection.hpp" | |
15 | #include "ctf-trace.hpp" | |
16 | #include "health-relayd.hpp" | |
17 | #include "index.hpp" | |
18 | #include "live.hpp" | |
19 | #include "lttng-relayd.hpp" | |
20 | #include "session.hpp" | |
21 | #include "sessiond-trace-chunks.hpp" | |
22 | #include "stream.hpp" | |
23 | #include "tcp_keep_alive.hpp" | |
24 | #include "testpoint.hpp" | |
25 | #include "tracefile-array.hpp" | |
26 | #include "utils.hpp" | |
27 | #include "version.hpp" | |
28 | #include "viewer-stream.hpp" | |
b8aa1682 | 29 | |
28ab034a JG |
30 | #include <common/align.hpp> |
31 | #include <common/buffer-view.hpp> | |
32 | #include <common/common.hpp> | |
33 | #include <common/compat/endian.hpp> | |
34 | #include <common/compat/getenv.hpp> | |
35 | #include <common/compat/poll.hpp> | |
36 | #include <common/compat/socket.hpp> | |
37 | #include <common/daemonize.hpp> | |
38 | #include <common/defaults.hpp> | |
39 | #include <common/dynamic-buffer.hpp> | |
40 | #include <common/fd-tracker/fd-tracker.hpp> | |
41 | #include <common/fd-tracker/utils.hpp> | |
42 | #include <common/futex.hpp> | |
43 | #include <common/ini-config/ini-config.hpp> | |
44 | #include <common/path.hpp> | |
45 | #include <common/sessiond-comm/inet.hpp> | |
46 | #include <common/sessiond-comm/relayd.hpp> | |
47 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
48 | #include <common/string-utils/format.hpp> | |
49 | #include <common/uri.hpp> | |
50 | #include <common/utils.hpp> | |
51 | ||
52 | #include <lttng/lttng.h> | |
53 | ||
54 | #include <algorithm> | |
55 | #include <ctype.h> | |
56 | #include <fcntl.h> | |
57 | #include <getopt.h> | |
58 | #include <grp.h> | |
59 | #include <inttypes.h> | |
60 | #include <limits.h> | |
61 | #include <pthread.h> | |
62 | #include <signal.h> | |
63 | #include <stdio.h> | |
64 | #include <stdlib.h> | |
65 | #include <string.h> | |
66 | #include <strings.h> | |
67 | #include <sys/mman.h> | |
68 | #include <sys/mount.h> | |
69 | #include <sys/resource.h> | |
70 | #include <sys/socket.h> | |
71 | #include <sys/stat.h> | |
72 | #include <sys/types.h> | |
73 | #include <sys/wait.h> | |
74 | #include <unistd.h> | |
75 | #include <urcu/futex.h> | |
76 | #include <urcu/rculist.h> | |
77 | #include <urcu/uatomic.h> | |
78 | ||
4fc83d94 PP |
79 | static const char *help_msg = |
80 | #ifdef LTTNG_EMBED_HELP | |
81 | #include <lttng-relayd.8.h> | |
82 | #else | |
cd9adb8b | 83 | nullptr |
4fc83d94 | 84 | #endif |
28ab034a | 85 | ; |
4fc83d94 | 86 | |
5569b118 JG |
87 | enum relay_connection_status { |
88 | RELAY_CONNECTION_STATUS_OK, | |
a9577b76 | 89 | /* An error occurred while processing an event on the connection. */ |
5569b118 JG |
90 | RELAY_CONNECTION_STATUS_ERROR, |
91 | /* Connection closed/shutdown cleanly. */ | |
92 | RELAY_CONNECTION_STATUS_CLOSED, | |
93 | }; | |
94 | ||
b8aa1682 | 95 | /* command line options */ |
ce9ee1fb | 96 | char *opt_output_path, *opt_working_directory; |
35ab25e5 | 97 | static int opt_daemon, opt_background, opt_print_version, opt_allow_clear = 1; |
a8b66566 | 98 | enum relay_group_output_by opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_UNKNOWN; |
3fd27398 | 99 | |
e56e5792 | 100 | /* Argument variables */ |
28ab034a JG |
101 | int lttng_opt_quiet; /* not static in error.h */ |
102 | int lttng_opt_verbose; /* not static in error.h */ | |
103 | int lttng_opt_mi; /* not static in error.h */ | |
e56e5792 | 104 | |
3fd27398 MD |
105 | /* |
106 | * We need to wait for listener and live listener threads, as well as | |
107 | * health check thread, before being ready to signal readiness. | |
108 | */ | |
28ab034a | 109 | #define NR_LTTNG_RELAY_READY 3 |
3fd27398 | 110 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; |
0848dba7 MD |
111 | |
112 | /* Size of receive buffer. */ | |
28ab034a | 113 | #define RECV_DATA_BUFFER_SIZE 65536 |
0848dba7 | 114 | |
28ab034a JG |
115 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ |
116 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
3fd27398 | 117 | |
095a4ae5 MD |
118 | static struct lttng_uri *control_uri; |
119 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 120 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
121 | |
122 | const char *progname; | |
b8aa1682 | 123 | |
65931c8b | 124 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
125 | static int tracing_group_name_override; |
126 | ||
28ab034a | 127 | const char *const config_section_name = "relayd"; |
65931c8b | 128 | |
b8aa1682 JD |
129 | /* |
130 | * This pipe is used to inform the worker thread that a command is queued and | |
131 | * ready to be processed. | |
132 | */ | |
58eb9381 | 133 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 134 | |
26c9d55e | 135 | /* Shared between threads */ |
b8aa1682 JD |
136 | static int dispatch_thread_exit; |
137 | ||
138 | static pthread_t listener_thread; | |
139 | static pthread_t dispatcher_thread; | |
140 | static pthread_t worker_thread; | |
65931c8b | 141 | static pthread_t health_thread; |
b8aa1682 | 142 | |
7591bab1 MD |
143 | /* |
144 | * last_relay_stream_id_lock protects last_relay_stream_id increment | |
145 | * atomicity on 32-bit architectures. | |
146 | */ | |
147 | static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER; | |
095a4ae5 | 148 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
149 | |
150 | /* | |
151 | * Relay command queue. | |
152 | * | |
153 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
154 | * queue. | |
155 | */ | |
58eb9381 | 156 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 | 157 | |
896010e3 | 158 | /* Cap of file desriptors to be in simultaneous use by the relay daemon. */ |
5c0551f9 | 159 | static unsigned int lttng_opt_fd_pool_size = -1; |
896010e3 | 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 | ||
00e3b7f1 JG |
175 | /* Global fd tracker. */ |
176 | struct fd_tracker *the_fd_tracker; | |
177 | ||
cd60b05a | 178 | static struct option long_options[] = { |
28ab034a JG |
179 | { |
180 | "control-port", | |
181 | 1, | |
cd9adb8b | 182 | nullptr, |
28ab034a JG |
183 | 'C', |
184 | }, | |
185 | { | |
186 | "data-port", | |
187 | 1, | |
cd9adb8b | 188 | nullptr, |
28ab034a JG |
189 | 'D', |
190 | }, | |
191 | { | |
192 | "live-port", | |
193 | 1, | |
cd9adb8b | 194 | nullptr, |
28ab034a JG |
195 | 'L', |
196 | }, | |
197 | { | |
198 | "daemonize", | |
199 | 0, | |
cd9adb8b | 200 | nullptr, |
28ab034a JG |
201 | 'd', |
202 | }, | |
203 | { | |
204 | "background", | |
205 | 0, | |
cd9adb8b | 206 | nullptr, |
28ab034a JG |
207 | 'b', |
208 | }, | |
209 | { | |
210 | "group", | |
211 | 1, | |
cd9adb8b | 212 | nullptr, |
28ab034a JG |
213 | 'g', |
214 | }, | |
215 | { | |
216 | "fd-pool-size", | |
217 | 1, | |
cd9adb8b | 218 | nullptr, |
28ab034a JG |
219 | '\0', |
220 | }, | |
221 | { | |
222 | "help", | |
223 | 0, | |
cd9adb8b | 224 | nullptr, |
28ab034a JG |
225 | 'h', |
226 | }, | |
227 | { | |
228 | "output", | |
229 | 1, | |
cd9adb8b | 230 | nullptr, |
28ab034a JG |
231 | 'o', |
232 | }, | |
233 | { | |
234 | "verbose", | |
235 | 0, | |
cd9adb8b | 236 | nullptr, |
28ab034a JG |
237 | 'v', |
238 | }, | |
cd9adb8b JG |
239 | { "config", 1, nullptr, 'f' }, |
240 | { "version", 0, nullptr, 'V' }, | |
28ab034a JG |
241 | { |
242 | "working-directory", | |
243 | 1, | |
cd9adb8b | 244 | nullptr, |
28ab034a JG |
245 | 'w', |
246 | }, | |
247 | { | |
248 | "group-output-by-session", | |
249 | 0, | |
cd9adb8b | 250 | nullptr, |
28ab034a JG |
251 | 's', |
252 | }, | |
253 | { | |
254 | "group-output-by-host", | |
255 | 0, | |
cd9adb8b | 256 | nullptr, |
28ab034a JG |
257 | 'p', |
258 | }, | |
cd9adb8b | 259 | { "disallow-clear", 0, nullptr, 'x' }, |
28ab034a | 260 | { |
cd9adb8b | 261 | nullptr, |
28ab034a | 262 | 0, |
cd9adb8b | 263 | nullptr, |
28ab034a JG |
264 | 0, |
265 | }, | |
cd60b05a JG |
266 | }; |
267 | ||
3a904098 | 268 | static const char *config_ignore_options[] = { "help", "config", "version" }; |
cd60b05a | 269 | |
cd9adb8b | 270 | static void print_version() |
28ab034a | 271 | { |
a3bc3918 JR |
272 | fprintf(stdout, "%s\n", VERSION); |
273 | } | |
274 | ||
cd9adb8b | 275 | static void relayd_config_log() |
a3bc3918 JR |
276 | { |
277 | DBG("LTTng-relayd " VERSION " - " VERSION_NAME "%s%s", | |
28ab034a JG |
278 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION, |
279 | EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME); | |
a3bc3918 JR |
280 | if (EXTRA_VERSION_DESCRIPTION[0] != '\0') { |
281 | DBG("LTTng-relayd extra version description:\n\t" EXTRA_VERSION_DESCRIPTION "\n"); | |
282 | } | |
7f5ed73a JR |
283 | if (EXTRA_VERSION_PATCHES[0] != '\0') { |
284 | DBG("LTTng-relayd extra patches:\n\t" EXTRA_VERSION_PATCHES "\n"); | |
285 | } | |
a3bc3918 JR |
286 | } |
287 | ||
cd60b05a JG |
288 | /* |
289 | * Take an option from the getopt output and set it in the right variable to be | |
290 | * used later. | |
291 | * | |
292 | * Return 0 on success else a negative value. | |
293 | */ | |
7591bab1 | 294 | static int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 295 | { |
cd60b05a JG |
296 | int ret; |
297 | ||
298 | switch (opt) { | |
299 | case 0: | |
5c0551f9 | 300 | if (!strcmp(optname, "fd-pool-size")) { |
896010e3 JG |
301 | unsigned long v; |
302 | ||
303 | errno = 0; | |
cd9adb8b | 304 | v = strtoul(arg, nullptr, 0); |
60b7e1f8 | 305 | if (errno != 0 || !isdigit((unsigned char) arg[0])) { |
5c0551f9 | 306 | ERR("Wrong value in --fd-pool-size parameter: %s", arg); |
896010e3 JG |
307 | ret = -1; |
308 | goto end; | |
309 | } | |
896010e3 | 310 | if (v >= UINT_MAX) { |
28ab034a JG |
311 | ERR("File descriptor cap overflow in --fd-pool-size parameter: %s", |
312 | arg); | |
896010e3 JG |
313 | ret = -1; |
314 | goto end; | |
315 | } | |
5c0551f9 | 316 | lttng_opt_fd_pool_size = (unsigned int) v; |
896010e3 JG |
317 | } else { |
318 | fprintf(stderr, "unknown option %s", optname); | |
319 | if (arg) { | |
320 | fprintf(stderr, " with arg %s\n", arg); | |
321 | } | |
cd60b05a JG |
322 | } |
323 | break; | |
324 | case 'C': | |
e8fa9fb0 MD |
325 | if (lttng_is_setuid_setgid()) { |
326 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 327 | "-C, --control-port"); |
e8fa9fb0 MD |
328 | } else { |
329 | ret = uri_parse(arg, &control_uri); | |
330 | if (ret < 0) { | |
331 | ERR("Invalid control URI specified"); | |
332 | goto end; | |
333 | } | |
334 | if (control_uri->port == 0) { | |
335 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
336 | } | |
cd60b05a JG |
337 | } |
338 | break; | |
339 | case 'D': | |
e8fa9fb0 MD |
340 | if (lttng_is_setuid_setgid()) { |
341 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 342 | "-D, -data-port"); |
e8fa9fb0 MD |
343 | } else { |
344 | ret = uri_parse(arg, &data_uri); | |
345 | if (ret < 0) { | |
346 | ERR("Invalid data URI specified"); | |
347 | goto end; | |
348 | } | |
349 | if (data_uri->port == 0) { | |
350 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
351 | } | |
cd60b05a JG |
352 | } |
353 | break; | |
8d5c808e | 354 | case 'L': |
e8fa9fb0 MD |
355 | if (lttng_is_setuid_setgid()) { |
356 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 357 | "-L, -live-port"); |
e8fa9fb0 MD |
358 | } else { |
359 | ret = uri_parse(arg, &live_uri); | |
360 | if (ret < 0) { | |
361 | ERR("Invalid live URI specified"); | |
362 | goto end; | |
363 | } | |
364 | if (live_uri->port == 0) { | |
365 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
366 | } | |
8d5c808e AM |
367 | } |
368 | break; | |
cd60b05a JG |
369 | case 'd': |
370 | opt_daemon = 1; | |
371 | break; | |
b5218ffb MD |
372 | case 'b': |
373 | opt_background = 1; | |
374 | break; | |
cd60b05a | 375 | case 'g': |
e8fa9fb0 MD |
376 | if (lttng_is_setuid_setgid()) { |
377 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 378 | "-g, --group"); |
e8fa9fb0 MD |
379 | } else { |
380 | tracing_group_name = strdup(arg); | |
cd9adb8b | 381 | if (tracing_group_name == nullptr) { |
e8fa9fb0 MD |
382 | ret = -errno; |
383 | PERROR("strdup"); | |
384 | goto end; | |
385 | } | |
386 | tracing_group_name_override = 1; | |
330a40bb | 387 | } |
cd60b05a JG |
388 | break; |
389 | case 'h': | |
4fc83d94 | 390 | ret = utils_show_help(8, "lttng-relayd", help_msg); |
655b5cc1 | 391 | if (ret) { |
4fc83d94 | 392 | ERR("Cannot show --help for `lttng-relayd`"); |
655b5cc1 PP |
393 | perror("exec"); |
394 | } | |
cd60b05a | 395 | exit(EXIT_FAILURE); |
3a904098 | 396 | case 'V': |
a3bc3918 JR |
397 | opt_print_version = 1; |
398 | break; | |
cd60b05a | 399 | case 'o': |
e8fa9fb0 MD |
400 | if (lttng_is_setuid_setgid()) { |
401 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 402 | "-o, --output"); |
e8fa9fb0 MD |
403 | } else { |
404 | ret = asprintf(&opt_output_path, "%s", arg); | |
405 | if (ret < 0) { | |
406 | ret = -errno; | |
407 | PERROR("asprintf opt_output_path"); | |
408 | goto end; | |
409 | } | |
cd60b05a JG |
410 | } |
411 | break; | |
ce9ee1fb JR |
412 | case 'w': |
413 | if (lttng_is_setuid_setgid()) { | |
414 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 415 | "-w, --working-directory"); |
ce9ee1fb JR |
416 | } else { |
417 | ret = asprintf(&opt_working_directory, "%s", arg); | |
418 | if (ret < 0) { | |
419 | ret = -errno; | |
420 | PERROR("asprintf opt_working_directory"); | |
421 | goto end; | |
422 | } | |
423 | } | |
424 | break; | |
425 | ||
cd60b05a JG |
426 | case 'v': |
427 | /* Verbose level can increase using multiple -v */ | |
428 | if (arg) { | |
429 | lttng_opt_verbose = config_parse_value(arg); | |
430 | } else { | |
849e5b7b DG |
431 | /* Only 3 level of verbosity (-vvv). */ |
432 | if (lttng_opt_verbose < 3) { | |
433 | lttng_opt_verbose += 1; | |
434 | } | |
cd60b05a JG |
435 | } |
436 | break; | |
a8b66566 JR |
437 | case 's': |
438 | if (opt_group_output_by != RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { | |
439 | ERR("Cannot set --group-output-by-session, another --group-output-by argument is present"); | |
440 | exit(EXIT_FAILURE); | |
441 | } | |
442 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_SESSION; | |
443 | break; | |
444 | case 'p': | |
445 | if (opt_group_output_by != RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { | |
446 | ERR("Cannot set --group-output-by-host, another --group-output-by argument is present"); | |
447 | exit(EXIT_FAILURE); | |
448 | } | |
449 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_HOST; | |
450 | break; | |
35ab25e5 MD |
451 | case 'x': |
452 | /* Disallow clear */ | |
453 | opt_allow_clear = 0; | |
454 | break; | |
cd60b05a JG |
455 | default: |
456 | /* Unknown option or other error. | |
457 | * Error is printed by getopt, just return */ | |
458 | ret = -1; | |
459 | goto end; | |
460 | } | |
461 | ||
462 | /* All good. */ | |
463 | ret = 0; | |
464 | ||
465 | end: | |
466 | return ret; | |
467 | } | |
468 | ||
469 | /* | |
470 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 471 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
cd60b05a JG |
472 | * return value conventions. |
473 | */ | |
f46376a1 | 474 | static int config_entry_handler(const struct config_entry *entry, |
28ab034a | 475 | void *unused __attribute__((unused))) |
cd60b05a JG |
476 | { |
477 | int ret = 0, i; | |
478 | ||
479 | if (!entry || !entry->name || !entry->value) { | |
480 | ret = -EINVAL; | |
481 | goto end; | |
482 | } | |
483 | ||
484 | /* Check if the option is to be ignored */ | |
485 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
486 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
487 | goto end; | |
488 | } | |
489 | } | |
490 | ||
491 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
492 | /* Ignore if entry name is not fully matched. */ | |
5c7248cd | 493 | if (strcmp(entry->name, long_options[i].name) != 0) { |
cd60b05a JG |
494 | continue; |
495 | } | |
496 | ||
497 | /* | |
7591bab1 MD |
498 | * If the option takes no argument on the command line, |
499 | * we have to check if the value is "true". We support | |
500 | * non-zero numeric values, true, on and yes. | |
cd60b05a JG |
501 | */ |
502 | if (!long_options[i].has_arg) { | |
503 | ret = config_parse_value(entry->value); | |
504 | if (ret <= 0) { | |
505 | if (ret) { | |
506 | WARN("Invalid configuration value \"%s\" for option %s", | |
28ab034a JG |
507 | entry->value, |
508 | entry->name); | |
cd60b05a JG |
509 | } |
510 | /* False, skip boolean config option. */ | |
511 | goto end; | |
512 | } | |
513 | } | |
514 | ||
515 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
516 | goto end; | |
517 | } | |
518 | ||
28ab034a | 519 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); |
cd60b05a JG |
520 | |
521 | end: | |
522 | return ret; | |
523 | } | |
524 | ||
cd9adb8b | 525 | static int parse_env_options() |
2a10de3b JR |
526 | { |
527 | int ret = 0; | |
cd9adb8b | 528 | char *value = nullptr; |
2a10de3b JR |
529 | |
530 | value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_WORKING_DIRECTORY_ENV); | |
531 | if (value) { | |
532 | opt_working_directory = strdup(value); | |
533 | if (!opt_working_directory) { | |
28ab034a | 534 | ERR("Failed to allocate working directory string (\"%s\")", value); |
2a10de3b JR |
535 | ret = -1; |
536 | } | |
537 | } | |
538 | return ret; | |
539 | } | |
540 | ||
cd9adb8b | 541 | static int set_fd_pool_size() |
5c0551f9 JG |
542 | { |
543 | int ret = 0; | |
544 | struct rlimit rlimit; | |
545 | ||
546 | ret = getrlimit(RLIMIT_NOFILE, &rlimit); | |
547 | if (ret) { | |
548 | PERROR("Failed to get file descriptor limit"); | |
549 | ret = -1; | |
550 | goto end; | |
551 | } | |
552 | ||
553 | DBG("File descriptor count limits are %" PRIu64 " (soft) and %" PRIu64 " (hard)", | |
28ab034a JG |
554 | (uint64_t) rlimit.rlim_cur, |
555 | (uint64_t) rlimit.rlim_max); | |
5c0551f9 JG |
556 | if (lttng_opt_fd_pool_size == -1) { |
557 | /* Use default value (soft limit - reserve). */ | |
558 | if (rlimit.rlim_cur < DEFAULT_RELAYD_MIN_FD_POOL_SIZE) { | |
28ab034a JG |
559 | ERR("The process' file number limit is too low (%" PRIu64 |
560 | "). The process' file number limit must be set to at least %i.", | |
561 | (uint64_t) rlimit.rlim_cur, | |
562 | DEFAULT_RELAYD_MIN_FD_POOL_SIZE); | |
5c0551f9 JG |
563 | ret = -1; |
564 | goto end; | |
565 | } | |
28ab034a | 566 | lttng_opt_fd_pool_size = rlimit.rlim_cur - DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE; |
5c0551f9 JG |
567 | goto end; |
568 | } | |
569 | ||
570 | if (lttng_opt_fd_pool_size < DEFAULT_RELAYD_MIN_FD_POOL_SIZE) { | |
571 | ERR("File descriptor pool size must be set to at least %d", | |
28ab034a | 572 | DEFAULT_RELAYD_MIN_FD_POOL_SIZE); |
5c0551f9 JG |
573 | ret = -1; |
574 | goto end; | |
575 | } | |
576 | ||
577 | if (lttng_opt_fd_pool_size > rlimit.rlim_cur) { | |
28ab034a JG |
578 | ERR("File descriptor pool size argument (%u) exceeds the process' soft limit (%" PRIu64 |
579 | ").", | |
580 | lttng_opt_fd_pool_size, | |
581 | (uint64_t) rlimit.rlim_cur); | |
5c0551f9 JG |
582 | ret = -1; |
583 | goto end; | |
584 | } | |
585 | ||
d49487dc | 586 | DBG("File descriptor pool size argument (%u) adjusted to %u to accommodates transient fd uses", |
28ab034a JG |
587 | lttng_opt_fd_pool_size, |
588 | lttng_opt_fd_pool_size - DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE); | |
5c0551f9 JG |
589 | lttng_opt_fd_pool_size -= DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE; |
590 | end: | |
591 | return ret; | |
592 | } | |
593 | ||
7591bab1 | 594 | static int set_options(int argc, char **argv) |
cd60b05a | 595 | { |
178a0557 | 596 | int c, ret = 0, option_index = 0, retval = 0; |
cd60b05a JG |
597 | int orig_optopt = optopt, orig_optind = optind; |
598 | char *default_address, *optstring; | |
cd9adb8b | 599 | char *config_path = nullptr; |
cd60b05a JG |
600 | |
601 | optstring = utils_generate_optstring(long_options, | |
28ab034a | 602 | sizeof(long_options) / sizeof(struct option)); |
cd60b05a | 603 | if (!optstring) { |
178a0557 | 604 | retval = -ENOMEM; |
cd60b05a JG |
605 | goto exit; |
606 | } | |
607 | ||
608 | /* Check for the --config option */ | |
609 | ||
28ab034a | 610 | while ((c = getopt_long(argc, argv, optstring, long_options, &option_index)) != -1) { |
cd60b05a | 611 | if (c == '?') { |
178a0557 | 612 | retval = -EINVAL; |
cd60b05a JG |
613 | goto exit; |
614 | } else if (c != 'f') { | |
615 | continue; | |
616 | } | |
617 | ||
e8fa9fb0 MD |
618 | if (lttng_is_setuid_setgid()) { |
619 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 620 | "-f, --config"); |
e8fa9fb0 | 621 | } else { |
3a9e5d16 | 622 | free(config_path); |
e8fa9fb0 MD |
623 | config_path = utils_expand_path(optarg); |
624 | if (!config_path) { | |
625 | ERR("Failed to resolve path: %s", optarg); | |
626 | } | |
cd60b05a JG |
627 | } |
628 | } | |
629 | ||
28ab034a | 630 | ret = config_get_section_entries( |
cd9adb8b | 631 | config_path, config_section_name, config_entry_handler, nullptr); |
cd60b05a JG |
632 | if (ret) { |
633 | if (ret > 0) { | |
634 | ERR("Invalid configuration option at line %i", ret); | |
cd60b05a | 635 | } |
178a0557 | 636 | retval = -1; |
cd60b05a JG |
637 | goto exit; |
638 | } | |
b8aa1682 | 639 | |
cd60b05a JG |
640 | /* Reset getopt's global state */ |
641 | optopt = orig_optopt; | |
642 | optind = orig_optind; | |
cd9adb8b | 643 | while (true) { |
cd60b05a | 644 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
645 | if (c == -1) { |
646 | break; | |
647 | } | |
648 | ||
cd60b05a JG |
649 | ret = set_option(c, optarg, long_options[option_index].name); |
650 | if (ret < 0) { | |
178a0557 | 651 | retval = -1; |
b8aa1682 JD |
652 | goto exit; |
653 | } | |
654 | } | |
655 | ||
656 | /* assign default values */ | |
cd9adb8b | 657 | if (control_uri == nullptr) { |
fa91dc52 | 658 | ret = asprintf(&default_address, |
28ab034a JG |
659 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", |
660 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
661 | if (ret < 0) { |
662 | PERROR("asprintf default data address"); | |
178a0557 | 663 | retval = -1; |
b8aa1682 JD |
664 | goto exit; |
665 | } | |
666 | ||
667 | ret = uri_parse(default_address, &control_uri); | |
668 | free(default_address); | |
669 | if (ret < 0) { | |
670 | ERR("Invalid control URI specified"); | |
178a0557 | 671 | retval = -1; |
b8aa1682 JD |
672 | goto exit; |
673 | } | |
674 | } | |
cd9adb8b | 675 | if (data_uri == nullptr) { |
fa91dc52 | 676 | ret = asprintf(&default_address, |
28ab034a JG |
677 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", |
678 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
679 | if (ret < 0) { |
680 | PERROR("asprintf default data address"); | |
178a0557 | 681 | retval = -1; |
b8aa1682 JD |
682 | goto exit; |
683 | } | |
684 | ||
685 | ret = uri_parse(default_address, &data_uri); | |
686 | free(default_address); | |
687 | if (ret < 0) { | |
688 | ERR("Invalid data URI specified"); | |
178a0557 | 689 | retval = -1; |
b8aa1682 JD |
690 | goto exit; |
691 | } | |
692 | } | |
cd9adb8b | 693 | if (live_uri == nullptr) { |
fa91dc52 | 694 | ret = asprintf(&default_address, |
28ab034a JG |
695 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", |
696 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
697 | if (ret < 0) { |
698 | PERROR("asprintf default viewer control address"); | |
178a0557 | 699 | retval = -1; |
d3e2ba59 JD |
700 | goto exit; |
701 | } | |
702 | ||
703 | ret = uri_parse(default_address, &live_uri); | |
704 | free(default_address); | |
705 | if (ret < 0) { | |
706 | ERR("Invalid viewer control URI specified"); | |
178a0557 | 707 | retval = -1; |
d3e2ba59 JD |
708 | goto exit; |
709 | } | |
710 | } | |
5c0551f9 JG |
711 | ret = set_fd_pool_size(); |
712 | if (ret) { | |
713 | retval = -1; | |
714 | goto exit; | |
896010e3 | 715 | } |
b8aa1682 | 716 | |
a8b66566 JR |
717 | if (opt_group_output_by == RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { |
718 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_HOST; | |
719 | } | |
35ab25e5 MD |
720 | if (opt_allow_clear) { |
721 | /* Check if env variable exists. */ | |
722 | const char *value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV); | |
723 | if (value) { | |
724 | ret = config_parse_value(value); | |
725 | if (ret < 0) { | |
28ab034a JG |
726 | ERR("Invalid value for %s specified", |
727 | DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV); | |
35ab25e5 MD |
728 | retval = -1; |
729 | goto exit; | |
730 | } | |
731 | opt_allow_clear = !ret; | |
732 | } | |
733 | } | |
a8b66566 | 734 | |
b8aa1682 | 735 | exit: |
3a9e5d16 | 736 | free(config_path); |
cd60b05a | 737 | free(optstring); |
178a0557 | 738 | return retval; |
b8aa1682 JD |
739 | } |
740 | ||
cd9adb8b | 741 | static void print_global_objects() |
7591bab1 | 742 | { |
7591bab1 MD |
743 | print_viewer_streams(); |
744 | print_relay_streams(); | |
745 | print_sessions(); | |
7591bab1 MD |
746 | } |
747 | ||
28ab034a | 748 | static int noop_close(void *data __attribute__((unused)), int *fds __attribute__((unused))) |
5c0551f9 JG |
749 | { |
750 | return 0; | |
751 | } | |
752 | ||
cd9adb8b | 753 | static void untrack_stdio() |
5c0551f9 JG |
754 | { |
755 | int fds[] = { fileno(stdout), fileno(stderr) }; | |
756 | ||
757 | /* | |
758 | * noop_close is used since we don't really want to close | |
759 | * the stdio output fds; we merely want to stop tracking them. | |
760 | */ | |
cd9adb8b | 761 | (void) fd_tracker_close_unsuspendable_fd(the_fd_tracker, fds, 2, noop_close, nullptr); |
5c0551f9 JG |
762 | } |
763 | ||
b8aa1682 JD |
764 | /* |
765 | * Cleanup the daemon | |
766 | */ | |
cd9adb8b | 767 | static void relayd_cleanup() |
b8aa1682 | 768 | { |
7591bab1 MD |
769 | print_global_objects(); |
770 | ||
b8aa1682 JD |
771 | DBG("Cleaning up"); |
772 | ||
178a0557 MD |
773 | if (viewer_streams_ht) |
774 | lttng_ht_destroy(viewer_streams_ht); | |
775 | if (relay_streams_ht) | |
776 | lttng_ht_destroy(relay_streams_ht); | |
7591bab1 MD |
777 | if (sessions_ht) |
778 | lttng_ht_destroy(sessions_ht); | |
178a0557 | 779 | |
095a4ae5 | 780 | free(opt_output_path); |
ce9ee1fb | 781 | free(opt_working_directory); |
095a4ae5 | 782 | |
794e2e5f JG |
783 | if (health_relayd) { |
784 | health_app_destroy(health_relayd); | |
785 | } | |
a02de639 | 786 | /* Close thread quit pipes */ |
bcee2b96 | 787 | if (health_quit_pipe[0] != -1) { |
28ab034a | 788 | (void) fd_tracker_util_pipe_close(the_fd_tracker, health_quit_pipe); |
bcee2b96 | 789 | } |
8a00688e | 790 | relayd_close_thread_quit_pipe(); |
794e2e5f | 791 | if (sessiond_trace_chunk_registry) { |
28ab034a | 792 | sessiond_trace_chunk_registry_destroy(sessiond_trace_chunk_registry); |
794e2e5f | 793 | } |
00e3b7f1 | 794 | if (the_fd_tracker) { |
9c256b01 JG |
795 | untrack_stdio(); |
796 | /* | |
797 | * fd_tracker_destroy() will log the contents of the fd-tracker | |
798 | * if a leak is detected. | |
799 | */ | |
00e3b7f1 JG |
800 | fd_tracker_destroy(the_fd_tracker); |
801 | } | |
794e2e5f | 802 | |
710c1f73 DG |
803 | uri_free(control_uri); |
804 | uri_free(data_uri); | |
8d5c808e | 805 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
806 | |
807 | if (tracing_group_name_override) { | |
808 | free((void *) tracing_group_name); | |
809 | } | |
b8aa1682 JD |
810 | } |
811 | ||
7591bab1 | 812 | static int notify_health_quit_pipe(int *pipe) |
65931c8b | 813 | { |
6cd525e8 | 814 | ssize_t ret; |
65931c8b | 815 | |
6cd525e8 MD |
816 | ret = lttng_write(pipe[1], "4", 1); |
817 | if (ret < 1) { | |
65931c8b | 818 | PERROR("write relay health quit"); |
b4aacfdc | 819 | goto end; |
65931c8b | 820 | } |
b4aacfdc MD |
821 | ret = 0; |
822 | end: | |
823 | return ret; | |
65931c8b MD |
824 | } |
825 | ||
b8aa1682 | 826 | /* |
b4aacfdc | 827 | * Stop all relayd and relayd-live threads. |
b8aa1682 | 828 | */ |
cd9adb8b | 829 | int lttng_relay_stop_threads() |
b8aa1682 | 830 | { |
b4aacfdc | 831 | int retval = 0; |
b8aa1682 JD |
832 | |
833 | /* Stopping all threads */ | |
834 | DBG("Terminating all threads"); | |
8a00688e | 835 | if (relayd_notify_thread_quit_pipe()) { |
b8aa1682 | 836 | ERR("write error on thread quit pipe"); |
b4aacfdc | 837 | retval = -1; |
b8aa1682 JD |
838 | } |
839 | ||
b4aacfdc MD |
840 | if (notify_health_quit_pipe(health_quit_pipe)) { |
841 | ERR("write error on health quit pipe"); | |
842 | } | |
65931c8b | 843 | |
b8aa1682 | 844 | /* Dispatch thread */ |
26c9d55e | 845 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 846 | futex_nto1_wake(&relay_conn_queue.futex); |
178a0557 | 847 | |
b4aacfdc | 848 | if (relayd_live_stop()) { |
178a0557 | 849 | ERR("Error stopping live threads"); |
b4aacfdc | 850 | retval = -1; |
178a0557 | 851 | } |
b4aacfdc | 852 | return retval; |
b8aa1682 JD |
853 | } |
854 | ||
855 | /* | |
856 | * Signal handler for the daemon | |
857 | * | |
858 | * Simply stop all worker threads, leaving main() return gracefully after | |
859 | * joining all threads and calling cleanup(). | |
860 | */ | |
7591bab1 | 861 | static void sighandler(int sig) |
b8aa1682 JD |
862 | { |
863 | switch (sig) { | |
b8aa1682 JD |
864 | case SIGINT: |
865 | DBG("SIGINT caught"); | |
b4aacfdc MD |
866 | if (lttng_relay_stop_threads()) { |
867 | ERR("Error stopping threads"); | |
868 | } | |
b8aa1682 JD |
869 | break; |
870 | case SIGTERM: | |
871 | DBG("SIGTERM caught"); | |
b4aacfdc MD |
872 | if (lttng_relay_stop_threads()) { |
873 | ERR("Error stopping threads"); | |
874 | } | |
b8aa1682 | 875 | break; |
3fd27398 MD |
876 | case SIGUSR1: |
877 | CMM_STORE_SHARED(recv_child_signal, 1); | |
878 | break; | |
b8aa1682 JD |
879 | default: |
880 | break; | |
881 | } | |
882 | } | |
883 | ||
884 | /* | |
885 | * Setup signal handler for : | |
886 | * SIGINT, SIGTERM, SIGPIPE | |
887 | */ | |
cd9adb8b | 888 | static int set_signal_handler() |
b8aa1682 JD |
889 | { |
890 | int ret = 0; | |
891 | struct sigaction sa; | |
892 | sigset_t sigset; | |
893 | ||
894 | if ((ret = sigemptyset(&sigset)) < 0) { | |
895 | PERROR("sigemptyset"); | |
896 | return ret; | |
897 | } | |
898 | ||
b8aa1682 JD |
899 | sa.sa_mask = sigset; |
900 | sa.sa_flags = 0; | |
0072e5e2 MD |
901 | |
902 | sa.sa_handler = sighandler; | |
cd9adb8b | 903 | if ((ret = sigaction(SIGTERM, &sa, nullptr)) < 0) { |
b8aa1682 JD |
904 | PERROR("sigaction"); |
905 | return ret; | |
906 | } | |
907 | ||
cd9adb8b | 908 | if ((ret = sigaction(SIGINT, &sa, nullptr)) < 0) { |
b8aa1682 JD |
909 | PERROR("sigaction"); |
910 | return ret; | |
911 | } | |
912 | ||
cd9adb8b | 913 | if ((ret = sigaction(SIGUSR1, &sa, nullptr)) < 0) { |
b8aa1682 JD |
914 | PERROR("sigaction"); |
915 | return ret; | |
916 | } | |
917 | ||
0072e5e2 | 918 | sa.sa_handler = SIG_IGN; |
cd9adb8b | 919 | if ((ret = sigaction(SIGPIPE, &sa, nullptr)) < 0) { |
3fd27398 MD |
920 | PERROR("sigaction"); |
921 | return ret; | |
922 | } | |
923 | ||
924 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
925 | |
926 | return ret; | |
927 | } | |
928 | ||
cd9adb8b | 929 | void lttng_relay_notify_ready() |
3fd27398 MD |
930 | { |
931 | /* Notify the parent of the fork() process that we are ready. */ | |
932 | if (opt_daemon || opt_background) { | |
933 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
934 | kill(child_ppid, SIGUSR1); | |
935 | } | |
936 | } | |
937 | } | |
938 | ||
bcee2b96 JG |
939 | /* |
940 | * Init health quit pipe. | |
941 | * | |
942 | * Return -1 on error or 0 if all pipes are created. | |
943 | */ | |
cd9adb8b | 944 | static int init_health_quit_pipe() |
bcee2b96 | 945 | { |
28ab034a JG |
946 | return fd_tracker_util_pipe_open_cloexec( |
947 | the_fd_tracker, "Health quit pipe", health_quit_pipe); | |
bcee2b96 JG |
948 | } |
949 | ||
40212d87 JG |
950 | static int create_sock(void *data, int *out_fd) |
951 | { | |
952 | int ret; | |
ac497a37 | 953 | struct lttcomm_sock *sock = (lttcomm_sock *) data; |
40212d87 JG |
954 | |
955 | ret = lttcomm_create_sock(sock); | |
956 | if (ret < 0) { | |
957 | goto end; | |
958 | } | |
959 | ||
960 | *out_fd = sock->fd; | |
961 | end: | |
962 | return ret; | |
963 | } | |
964 | ||
f46376a1 | 965 | static int close_sock(void *data, int *in_fd __attribute__((unused))) |
40212d87 | 966 | { |
ac497a37 | 967 | struct lttcomm_sock *sock = (lttcomm_sock *) data; |
40212d87 JG |
968 | |
969 | return sock->ops->close(sock); | |
970 | } | |
971 | ||
f355467e JG |
972 | static int accept_sock(void *data, int *out_fd) |
973 | { | |
974 | int ret = 0; | |
975 | /* Socks is an array of in_sock, out_sock. */ | |
ac497a37 | 976 | struct lttcomm_sock **socks = (lttcomm_sock **) data; |
f355467e JG |
977 | struct lttcomm_sock *in_sock = socks[0]; |
978 | ||
f118099a | 979 | socks[1] = in_sock->ops->accept(in_sock); |
f355467e JG |
980 | if (!socks[1]) { |
981 | ret = -1; | |
982 | goto end; | |
983 | } | |
984 | *out_fd = socks[1]->fd; | |
985 | end: | |
986 | return ret; | |
987 | } | |
988 | ||
b8aa1682 JD |
989 | /* |
990 | * Create and init socket from uri. | |
991 | */ | |
28ab034a | 992 | static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri, const char *name) |
b8aa1682 | 993 | { |
40212d87 | 994 | int ret, sock_fd; |
cd9adb8b | 995 | struct lttcomm_sock *sock = nullptr; |
40212d87 | 996 | char uri_str[PATH_MAX]; |
cd9adb8b | 997 | char *formated_name = nullptr; |
b8aa1682 JD |
998 | |
999 | sock = lttcomm_alloc_sock_from_uri(uri); | |
cd9adb8b | 1000 | if (sock == nullptr) { |
b8aa1682 JD |
1001 | ERR("Allocating socket"); |
1002 | goto error; | |
1003 | } | |
1004 | ||
40212d87 JG |
1005 | /* |
1006 | * Don't fail to create the socket if the name can't be built as it is | |
1007 | * only used for debugging purposes. | |
1008 | */ | |
1009 | ret = uri_to_str_url(uri, uri_str, sizeof(uri_str)); | |
1010 | uri_str[sizeof(uri_str) - 1] = '\0'; | |
1011 | if (ret >= 0) { | |
28ab034a | 1012 | ret = asprintf(&formated_name, "%s socket @ %s", name, uri_str); |
40212d87 | 1013 | if (ret < 0) { |
cd9adb8b | 1014 | formated_name = nullptr; |
40212d87 | 1015 | } |
b8aa1682 | 1016 | } |
40212d87 | 1017 | |
28ab034a JG |
1018 | ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, |
1019 | &sock_fd, | |
1020 | (const char **) (formated_name ? &formated_name : | |
cd9adb8b | 1021 | nullptr), |
28ab034a JG |
1022 | 1, |
1023 | create_sock, | |
1024 | sock); | |
6016eb62 | 1025 | if (ret) { |
28ab034a | 1026 | PERROR("Failed to open \"%s\" relay socket", formated_name ?: "Unknown"); |
6016eb62 JG |
1027 | goto error; |
1028 | } | |
40212d87 | 1029 | DBG("Listening on %s socket %d", name, sock->fd); |
b8aa1682 JD |
1030 | |
1031 | ret = sock->ops->bind(sock); | |
1032 | if (ret < 0) { | |
2288467f | 1033 | PERROR("Failed to bind socket"); |
b8aa1682 JD |
1034 | goto error; |
1035 | } | |
1036 | ||
1037 | ret = sock->ops->listen(sock, -1); | |
1038 | if (ret < 0) { | |
1039 | goto error; | |
b8aa1682 JD |
1040 | } |
1041 | ||
6016eb62 | 1042 | free(formated_name); |
b8aa1682 JD |
1043 | return sock; |
1044 | ||
1045 | error: | |
1046 | if (sock) { | |
1047 | lttcomm_destroy_sock(sock); | |
1048 | } | |
6016eb62 | 1049 | free(formated_name); |
cd9adb8b | 1050 | return nullptr; |
b8aa1682 JD |
1051 | } |
1052 | ||
28ab034a JG |
1053 | static struct lttcomm_sock *accept_relayd_sock(struct lttcomm_sock *listening_sock, |
1054 | const char *name) | |
f355467e JG |
1055 | { |
1056 | int out_fd, ret; | |
cd9adb8b JG |
1057 | struct lttcomm_sock *socks[2] = { listening_sock, nullptr }; |
1058 | struct lttcomm_sock *new_sock = nullptr; | |
f355467e | 1059 | |
f118099a | 1060 | ret = fd_tracker_open_unsuspendable_fd( |
28ab034a | 1061 | the_fd_tracker, &out_fd, (const char **) &name, 1, accept_sock, &socks); |
f355467e JG |
1062 | if (ret) { |
1063 | goto end; | |
1064 | } | |
1065 | new_sock = socks[1]; | |
1066 | DBG("%s accepted, socket %d", name, new_sock->fd); | |
1067 | end: | |
1068 | return new_sock; | |
1069 | } | |
1070 | ||
b8aa1682 JD |
1071 | /* |
1072 | * This thread manages the listening for new connections on the network | |
1073 | */ | |
f46376a1 | 1074 | static void *relay_thread_listener(void *data __attribute__((unused))) |
b8aa1682 | 1075 | { |
8a00688e MJ |
1076 | int i, ret, err = -1; |
1077 | uint32_t nb_fd; | |
b8aa1682 JD |
1078 | struct lttng_poll_event events; |
1079 | struct lttcomm_sock *control_sock, *data_sock; | |
1080 | ||
b8aa1682 JD |
1081 | DBG("[thread] Relay listener started"); |
1082 | ||
8fba2b8d | 1083 | rcu_register_thread(); |
55706a7d MD |
1084 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
1085 | ||
f385ae0a MD |
1086 | health_code_update(); |
1087 | ||
40212d87 | 1088 | control_sock = relay_socket_create(control_uri, "Control listener"); |
b8aa1682 | 1089 | if (!control_sock) { |
095a4ae5 | 1090 | goto error_sock_control; |
b8aa1682 JD |
1091 | } |
1092 | ||
40212d87 | 1093 | data_sock = relay_socket_create(data_uri, "Data listener"); |
b8aa1682 | 1094 | if (!data_sock) { |
095a4ae5 | 1095 | goto error_sock_relay; |
b8aa1682 JD |
1096 | } |
1097 | ||
1098 | /* | |
7591bab1 MD |
1099 | * Pass 3 as size here for the thread quit pipe, control and |
1100 | * data socket. | |
b8aa1682 | 1101 | */ |
ba9cf8e1 | 1102 | ret = create_named_thread_poll_set(&events, 3, "Listener thread epoll"); |
b8aa1682 JD |
1103 | if (ret < 0) { |
1104 | goto error_create_poll; | |
1105 | } | |
1106 | ||
1107 | /* Add the control socket */ | |
1108 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
1109 | if (ret < 0) { | |
1110 | goto error_poll_add; | |
1111 | } | |
1112 | ||
1113 | /* Add the data socket */ | |
1114 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
1115 | if (ret < 0) { | |
1116 | goto error_poll_add; | |
1117 | } | |
1118 | ||
3fd27398 MD |
1119 | lttng_relay_notify_ready(); |
1120 | ||
9b5e0863 MD |
1121 | if (testpoint(relayd_thread_listener)) { |
1122 | goto error_testpoint; | |
1123 | } | |
1124 | ||
cd9adb8b | 1125 | while (true) { |
f385ae0a MD |
1126 | health_code_update(); |
1127 | ||
b8aa1682 JD |
1128 | DBG("Listener accepting connections"); |
1129 | ||
28ab034a | 1130 | restart: |
f385ae0a | 1131 | health_poll_entry(); |
b8aa1682 | 1132 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 1133 | health_poll_exit(); |
b8aa1682 JD |
1134 | if (ret < 0) { |
1135 | /* | |
1136 | * Restart interrupted system call. | |
1137 | */ | |
1138 | if (errno == EINTR) { | |
1139 | goto restart; | |
1140 | } | |
1141 | goto error; | |
1142 | } | |
1143 | ||
0d9c5d77 DG |
1144 | nb_fd = ret; |
1145 | ||
b8aa1682 JD |
1146 | DBG("Relay new connection received"); |
1147 | for (i = 0; i < nb_fd; i++) { | |
1148 | /* Fetch once the poll data */ | |
8a00688e MJ |
1149 | const auto revents = LTTNG_POLL_GETEV(&events, i); |
1150 | const auto pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 1151 | |
8a00688e MJ |
1152 | health_code_update(); |
1153 | ||
1154 | /* Activity on thread quit pipe, exiting. */ | |
1155 | if (relayd_is_thread_quit_pipe(pollfd)) { | |
1156 | DBG("Activity on thread quit pipe"); | |
095a4ae5 MD |
1157 | err = 0; |
1158 | goto exit; | |
b8aa1682 JD |
1159 | } |
1160 | ||
03e43155 | 1161 | if (revents & LPOLLIN) { |
4b7f17b2 | 1162 | /* |
7591bab1 MD |
1163 | * A new connection is requested, therefore a |
1164 | * sessiond/consumerd connection is allocated in | |
1165 | * this thread, enqueued to a global queue and | |
1166 | * dequeued (and freed) in the worker thread. | |
4b7f17b2 | 1167 | */ |
58eb9381 DG |
1168 | int val = 1; |
1169 | struct relay_connection *new_conn; | |
cd9adb8b | 1170 | struct lttcomm_sock *newsock = nullptr; |
7591bab1 | 1171 | enum connection_type type; |
b8aa1682 JD |
1172 | |
1173 | if (pollfd == data_sock->fd) { | |
7591bab1 | 1174 | type = RELAY_DATA; |
f355467e | 1175 | newsock = accept_relayd_sock(data_sock, |
28ab034a | 1176 | "Data socket to relayd"); |
4b7f17b2 | 1177 | } else { |
a0377dfe | 1178 | LTTNG_ASSERT(pollfd == control_sock->fd); |
7591bab1 | 1179 | type = RELAY_CONTROL; |
875e3164 | 1180 | newsock = accept_relayd_sock(control_sock, |
28ab034a | 1181 | "Control socket to relayd"); |
b8aa1682 | 1182 | } |
58eb9381 DG |
1183 | if (!newsock) { |
1184 | PERROR("accepting sock"); | |
58eb9381 DG |
1185 | goto error; |
1186 | } | |
1187 | ||
28ab034a JG |
1188 | ret = setsockopt( |
1189 | newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); | |
b8aa1682 JD |
1190 | if (ret < 0) { |
1191 | PERROR("setsockopt inet"); | |
4b7f17b2 | 1192 | lttcomm_destroy_sock(newsock); |
b8aa1682 JD |
1193 | goto error; |
1194 | } | |
f056029c JR |
1195 | |
1196 | ret = socket_apply_keep_alive_config(newsock->fd); | |
1197 | if (ret < 0) { | |
1198 | ERR("Failed to apply TCP keep-alive configuration on socket (%i)", | |
28ab034a | 1199 | newsock->fd); |
f056029c JR |
1200 | lttcomm_destroy_sock(newsock); |
1201 | goto error; | |
1202 | } | |
1203 | ||
7591bab1 MD |
1204 | new_conn = connection_create(newsock, type); |
1205 | if (!new_conn) { | |
1206 | lttcomm_destroy_sock(newsock); | |
1207 | goto error; | |
1208 | } | |
58eb9381 DG |
1209 | |
1210 | /* Enqueue request for the dispatcher thread. */ | |
ac497a37 SM |
1211 | cds_wfcq_head_ptr_t head; |
1212 | head.h = &relay_conn_queue.head; | |
28ab034a | 1213 | cds_wfcq_enqueue(head, &relay_conn_queue.tail, &new_conn->qnode); |
b8aa1682 JD |
1214 | |
1215 | /* | |
7591bab1 MD |
1216 | * Wake the dispatch queue futex. |
1217 | * Implicit memory barrier with the | |
1218 | * exchange in cds_wfcq_enqueue. | |
b8aa1682 | 1219 | */ |
58eb9381 | 1220 | futex_nto1_wake(&relay_conn_queue.futex); |
03e43155 MD |
1221 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1222 | ERR("socket poll error"); | |
1223 | goto error; | |
1224 | } else { | |
1225 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1226 | goto error; | |
b8aa1682 JD |
1227 | } |
1228 | } | |
1229 | } | |
1230 | ||
095a4ae5 | 1231 | exit: |
b8aa1682 JD |
1232 | error: |
1233 | error_poll_add: | |
9b5e0863 | 1234 | error_testpoint: |
ba9cf8e1 | 1235 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
b8aa1682 | 1236 | error_create_poll: |
095a4ae5 | 1237 | if (data_sock->fd >= 0) { |
40212d87 JG |
1238 | int data_sock_fd = data_sock->fd; |
1239 | ||
28ab034a JG |
1240 | ret = fd_tracker_close_unsuspendable_fd( |
1241 | the_fd_tracker, &data_sock_fd, 1, close_sock, data_sock); | |
b8aa1682 | 1242 | if (ret) { |
40212d87 | 1243 | PERROR("Failed to close the data listener socket file descriptor"); |
b8aa1682 | 1244 | } |
40212d87 | 1245 | data_sock->fd = -1; |
b8aa1682 | 1246 | } |
095a4ae5 MD |
1247 | lttcomm_destroy_sock(data_sock); |
1248 | error_sock_relay: | |
1249 | if (control_sock->fd >= 0) { | |
40212d87 JG |
1250 | int control_sock_fd = control_sock->fd; |
1251 | ||
28ab034a JG |
1252 | ret = fd_tracker_close_unsuspendable_fd( |
1253 | the_fd_tracker, &control_sock_fd, 1, close_sock, control_sock); | |
b8aa1682 | 1254 | if (ret) { |
40212d87 | 1255 | PERROR("Failed to close the control listener socket file descriptor"); |
b8aa1682 | 1256 | } |
40212d87 | 1257 | control_sock->fd = -1; |
b8aa1682 | 1258 | } |
095a4ae5 MD |
1259 | lttcomm_destroy_sock(control_sock); |
1260 | error_sock_control: | |
1261 | if (err) { | |
f385ae0a MD |
1262 | health_error(); |
1263 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 1264 | } |
55706a7d | 1265 | health_unregister(health_relayd); |
8fba2b8d | 1266 | rcu_unregister_thread(); |
b8aa1682 | 1267 | DBG("Relay listener thread cleanup complete"); |
b4aacfdc | 1268 | lttng_relay_stop_threads(); |
cd9adb8b | 1269 | return nullptr; |
b8aa1682 JD |
1270 | } |
1271 | ||
1272 | /* | |
1273 | * This thread manages the dispatching of the requests to worker threads | |
1274 | */ | |
f46376a1 | 1275 | static void *relay_thread_dispatcher(void *data __attribute__((unused))) |
b8aa1682 | 1276 | { |
6cd525e8 MD |
1277 | int err = -1; |
1278 | ssize_t ret; | |
8bdee6e2 | 1279 | struct cds_wfcq_node *node; |
cd9adb8b | 1280 | struct relay_connection *new_conn = nullptr; |
b8aa1682 JD |
1281 | |
1282 | DBG("[thread] Relay dispatcher started"); | |
1283 | ||
55706a7d MD |
1284 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
1285 | ||
9b5e0863 MD |
1286 | if (testpoint(relayd_thread_dispatcher)) { |
1287 | goto error_testpoint; | |
1288 | } | |
1289 | ||
f385ae0a MD |
1290 | health_code_update(); |
1291 | ||
0ed3b1a8 | 1292 | for (;;) { |
f385ae0a MD |
1293 | health_code_update(); |
1294 | ||
b8aa1682 | 1295 | /* Atomically prepare the queue futex */ |
58eb9381 | 1296 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 | 1297 | |
0ed3b1a8 MD |
1298 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1299 | break; | |
1300 | } | |
1301 | ||
b8aa1682 | 1302 | do { |
f385ae0a MD |
1303 | health_code_update(); |
1304 | ||
b8aa1682 | 1305 | /* Dequeue commands */ |
8bdee6e2 SM |
1306 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
1307 | &relay_conn_queue.tail); | |
cd9adb8b | 1308 | if (node == nullptr) { |
b8aa1682 JD |
1309 | DBG("Woken up but nothing in the relay command queue"); |
1310 | /* Continue thread execution */ | |
1311 | break; | |
1312 | } | |
0114db0e | 1313 | new_conn = lttng::utils::container_of(node, &relay_connection::qnode); |
b8aa1682 | 1314 | |
58eb9381 | 1315 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
1316 | |
1317 | /* | |
7591bab1 MD |
1318 | * Inform worker thread of the new request. This |
1319 | * call is blocking so we can be assured that | |
1320 | * the data will be read at some point in time | |
1321 | * or wait to the end of the world :) | |
b8aa1682 | 1322 | */ |
5c7248cd JG |
1323 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); /* NOLINT |
1324 | sizeof | |
1325 | used | |
1326 | on a | |
1327 | pointer. | |
1328 | */ | |
58eb9381 DG |
1329 | if (ret < 0) { |
1330 | PERROR("write connection pipe"); | |
7591bab1 | 1331 | connection_put(new_conn); |
b8aa1682 JD |
1332 | goto error; |
1333 | } | |
cd9adb8b | 1334 | } while (node != nullptr); |
b8aa1682 JD |
1335 | |
1336 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 1337 | health_poll_entry(); |
58eb9381 | 1338 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 1339 | health_poll_exit(); |
b8aa1682 JD |
1340 | } |
1341 | ||
f385ae0a MD |
1342 | /* Normal exit, no error */ |
1343 | err = 0; | |
1344 | ||
b8aa1682 | 1345 | error: |
9b5e0863 | 1346 | error_testpoint: |
f385ae0a MD |
1347 | if (err) { |
1348 | health_error(); | |
1349 | ERR("Health error occurred in %s", __func__); | |
1350 | } | |
55706a7d | 1351 | health_unregister(health_relayd); |
b8aa1682 | 1352 | DBG("Dispatch thread dying"); |
b4aacfdc | 1353 | lttng_relay_stop_threads(); |
cd9adb8b | 1354 | return nullptr; |
b8aa1682 JD |
1355 | } |
1356 | ||
298a25ca JG |
1357 | static bool session_streams_have_index(const struct relay_session *session) |
1358 | { | |
1359 | return session->minor >= 4 && !session->snapshot; | |
1360 | } | |
1361 | ||
c5b6f4f0 DG |
1362 | /* |
1363 | * Handle the RELAYD_CREATE_SESSION command. | |
1364 | * | |
1365 | * On success, send back the session id or else return a negative value. | |
1366 | */ | |
28ab034a JG |
1367 | static int relay_create_session(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
1368 | struct relay_connection *conn, | |
1369 | const struct lttng_buffer_view *payload) | |
c5b6f4f0 | 1370 | { |
5312a3ed JG |
1371 | int ret = 0; |
1372 | ssize_t send_ret; | |
cd9adb8b | 1373 | struct relay_session *session = nullptr; |
ecd1a12f | 1374 | struct lttcomm_relayd_create_session_reply_2_11 reply = {}; |
1e791a74 JG |
1375 | char session_name[LTTNG_NAME_MAX] = {}; |
1376 | char hostname[LTTNG_HOST_NAME_MAX] = {}; | |
7591bab1 MD |
1377 | uint32_t live_timer = 0; |
1378 | bool snapshot = false; | |
46ef2188 | 1379 | bool session_name_contains_creation_timestamp = false; |
23c8ff50 | 1380 | /* Left nil for peers < 2.11. */ |
6fa5fe7c | 1381 | char base_path[LTTNG_PATH_MAX] = {}; |
23c8ff50 | 1382 | lttng_uuid sessiond_uuid = {}; |
1e791a74 JG |
1383 | LTTNG_OPTIONAL(uint64_t) id_sessiond = {}; |
1384 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; | |
db1da059 | 1385 | LTTNG_OPTIONAL(time_t) creation_time = {}; |
ecd1a12f MD |
1386 | struct lttng_dynamic_buffer reply_payload; |
1387 | ||
1388 | lttng_dynamic_buffer_init(&reply_payload); | |
c5b6f4f0 | 1389 | |
f86f6389 JR |
1390 | if (conn->minor < 4) { |
1391 | /* From 2.1 to 2.3 */ | |
1392 | ret = 0; | |
1393 | } else if (conn->minor >= 4 && conn->minor < 11) { | |
1394 | /* From 2.4 to 2.10 */ | |
28ab034a JG |
1395 | ret = cmd_create_session_2_4( |
1396 | payload, session_name, hostname, &live_timer, &snapshot); | |
f86f6389 | 1397 | } else { |
84fa4db5 | 1398 | bool has_current_chunk; |
db1da059 JG |
1399 | uint64_t current_chunk_id_value; |
1400 | time_t creation_time_value; | |
1401 | uint64_t id_sessiond_value; | |
84fa4db5 | 1402 | |
f86f6389 | 1403 | /* From 2.11 to ... */ |
28ab034a JG |
1404 | ret = cmd_create_session_2_11(payload, |
1405 | session_name, | |
1406 | hostname, | |
1407 | base_path, | |
1408 | &live_timer, | |
1409 | &snapshot, | |
1410 | &id_sessiond_value, | |
1411 | sessiond_uuid, | |
1412 | &has_current_chunk, | |
1413 | ¤t_chunk_id_value, | |
1414 | &creation_time_value, | |
1415 | &session_name_contains_creation_timestamp); | |
23c8ff50 JG |
1416 | if (lttng_uuid_is_nil(sessiond_uuid)) { |
1417 | /* The nil UUID is reserved for pre-2.11 clients. */ | |
1418 | ERR("Illegal nil UUID announced by peer in create session command"); | |
1419 | ret = -1; | |
1420 | goto send_reply; | |
1421 | } | |
db1da059 JG |
1422 | LTTNG_OPTIONAL_SET(&id_sessiond, id_sessiond_value); |
1423 | LTTNG_OPTIONAL_SET(&creation_time, creation_time_value); | |
1424 | if (has_current_chunk) { | |
28ab034a | 1425 | LTTNG_OPTIONAL_SET(¤t_chunk_id, current_chunk_id_value); |
db1da059 | 1426 | } |
7591bab1 | 1427 | } |
f86f6389 | 1428 | |
7591bab1 MD |
1429 | if (ret < 0) { |
1430 | goto send_reply; | |
d3e2ba59 JD |
1431 | } |
1432 | ||
28ab034a JG |
1433 | session = session_create(session_name, |
1434 | hostname, | |
1435 | base_path, | |
1436 | live_timer, | |
1437 | snapshot, | |
1438 | sessiond_uuid, | |
cd9adb8b JG |
1439 | id_sessiond.is_set ? &id_sessiond.value : nullptr, |
1440 | current_chunk_id.is_set ? ¤t_chunk_id.value : nullptr, | |
1441 | creation_time.is_set ? &creation_time.value : nullptr, | |
28ab034a JG |
1442 | conn->major, |
1443 | conn->minor, | |
1444 | session_name_contains_creation_timestamp); | |
7591bab1 MD |
1445 | if (!session) { |
1446 | ret = -1; | |
1447 | goto send_reply; | |
1448 | } | |
a0377dfe | 1449 | LTTNG_ASSERT(!conn->session); |
7591bab1 | 1450 | conn->session = session; |
c5b6f4f0 DG |
1451 | DBG("Created session %" PRIu64, session->id); |
1452 | ||
ecd1a12f | 1453 | reply.generic.session_id = htobe64(session->id); |
7591bab1 MD |
1454 | |
1455 | send_reply: | |
c5b6f4f0 | 1456 | if (ret < 0) { |
ecd1a12f | 1457 | reply.generic.ret_code = htobe32(LTTNG_ERR_FATAL); |
c5b6f4f0 | 1458 | } else { |
ecd1a12f | 1459 | reply.generic.ret_code = htobe32(LTTNG_OK); |
c5b6f4f0 DG |
1460 | } |
1461 | ||
ecd1a12f MD |
1462 | if (conn->minor < 11) { |
1463 | /* From 2.1 to 2.10 */ | |
28ab034a JG |
1464 | ret = lttng_dynamic_buffer_append( |
1465 | &reply_payload, &reply.generic, sizeof(reply.generic)); | |
ecd1a12f MD |
1466 | if (ret) { |
1467 | ERR("Failed to append \"create session\" command reply header to payload buffer"); | |
1468 | ret = -1; | |
1469 | goto end; | |
1470 | } | |
1471 | } else { | |
28ab034a | 1472 | const uint32_t output_path_length = session ? strlen(session->output_path) + 1 : 0; |
ecd1a12f MD |
1473 | |
1474 | reply.output_path_length = htobe32(output_path_length); | |
28ab034a | 1475 | ret = lttng_dynamic_buffer_append(&reply_payload, &reply, sizeof(reply)); |
ecd1a12f MD |
1476 | if (ret) { |
1477 | ERR("Failed to append \"create session\" command reply header to payload buffer"); | |
1478 | goto end; | |
1479 | } | |
1480 | ||
8d382dd4 | 1481 | if (output_path_length) { |
28ab034a JG |
1482 | ret = lttng_dynamic_buffer_append( |
1483 | &reply_payload, session->output_path, output_path_length); | |
8d382dd4 JG |
1484 | if (ret) { |
1485 | ERR("Failed to append \"create session\" command reply path to payload buffer"); | |
1486 | goto end; | |
1487 | } | |
ecd1a12f MD |
1488 | } |
1489 | } | |
1490 | ||
28ab034a | 1491 | send_ret = conn->sock->ops->sendmsg(conn->sock, reply_payload.data, reply_payload.size, 0); |
ecd1a12f MD |
1492 | if (send_ret < (ssize_t) reply_payload.size) { |
1493 | ERR("Failed to send \"create session\" command reply of %zu bytes (ret = %zd)", | |
28ab034a JG |
1494 | reply_payload.size, |
1495 | send_ret); | |
5312a3ed | 1496 | ret = -1; |
c5b6f4f0 | 1497 | } |
ecd1a12f | 1498 | end: |
4c6885d2 JG |
1499 | if (ret < 0 && session) { |
1500 | session_put(session); | |
1501 | } | |
ecd1a12f | 1502 | lttng_dynamic_buffer_reset(&reply_payload); |
c5b6f4f0 DG |
1503 | return ret; |
1504 | } | |
1505 | ||
a4baae1b JD |
1506 | /* |
1507 | * When we have received all the streams and the metadata for a channel, | |
1508 | * we make them visible to the viewer threads. | |
1509 | */ | |
7591bab1 | 1510 | static void publish_connection_local_streams(struct relay_connection *conn) |
a4baae1b | 1511 | { |
7591bab1 MD |
1512 | struct relay_stream *stream; |
1513 | struct relay_session *session = conn->session; | |
a4baae1b | 1514 | |
7591bab1 MD |
1515 | /* |
1516 | * We publish all streams belonging to a session atomically wrt | |
1517 | * session lock. | |
1518 | */ | |
1519 | pthread_mutex_lock(&session->lock); | |
1520 | rcu_read_lock(); | |
28ab034a JG |
1521 | cds_list_for_each_entry_rcu(stream, &session->recv_list, recv_node) |
1522 | { | |
7591bab1 | 1523 | stream_publish(stream); |
a4baae1b | 1524 | } |
7591bab1 | 1525 | rcu_read_unlock(); |
a4baae1b | 1526 | |
7591bab1 MD |
1527 | /* |
1528 | * Inform the viewer that there are new streams in the session. | |
1529 | */ | |
1530 | if (session->viewer_attached) { | |
1531 | uatomic_set(&session->new_streams, 1); | |
1532 | } | |
1533 | pthread_mutex_unlock(&session->lock); | |
a4baae1b JD |
1534 | } |
1535 | ||
348a81dc JG |
1536 | static int conform_channel_path(char *channel_path) |
1537 | { | |
1538 | int ret = 0; | |
1539 | ||
1540 | if (strstr("../", channel_path)) { | |
1541 | ERR("Refusing channel path as it walks up the path hierarchy: \"%s\"", | |
28ab034a | 1542 | channel_path); |
348a81dc JG |
1543 | ret = -1; |
1544 | goto end; | |
1545 | } | |
1546 | ||
1547 | if (*channel_path == '/') { | |
1548 | const size_t len = strlen(channel_path); | |
1549 | ||
1550 | /* | |
1551 | * Channel paths from peers prior to 2.11 are expressed as an | |
1552 | * absolute path that is, in reality, relative to the relay | |
1553 | * daemon's output directory. Remove the leading slash so it | |
1554 | * is correctly interpreted as a relative path later on. | |
1555 | * | |
1556 | * len (and not len - 1) is used to copy the trailing NULL. | |
1557 | */ | |
1558 | bcopy(channel_path + 1, channel_path, len); | |
1559 | } | |
1560 | end: | |
1561 | return ret; | |
1562 | } | |
1563 | ||
b8aa1682 JD |
1564 | /* |
1565 | * relay_add_stream: allocate a new stream for a session | |
1566 | */ | |
28ab034a JG |
1567 | static int relay_add_stream(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
1568 | struct relay_connection *conn, | |
1569 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1570 | { |
7591bab1 MD |
1571 | int ret; |
1572 | ssize_t send_ret; | |
58eb9381 | 1573 | struct relay_session *session = conn->session; |
cd9adb8b | 1574 | struct relay_stream *stream = nullptr; |
b8aa1682 | 1575 | struct lttcomm_relayd_status_stream reply; |
cd9adb8b | 1576 | struct ctf_trace *trace = nullptr; |
7591bab1 | 1577 | uint64_t stream_handle = -1ULL; |
cd9adb8b | 1578 | char *path_name = nullptr, *channel_name = nullptr; |
7591bab1 | 1579 | uint64_t tracefile_size = 0, tracefile_count = 0; |
348a81dc | 1580 | LTTNG_OPTIONAL(uint64_t) stream_chunk_id = {}; |
b8aa1682 | 1581 | |
5312a3ed | 1582 | if (!session || !conn->version_check_done) { |
b8aa1682 JD |
1583 | ERR("Trying to add a stream before version check"); |
1584 | ret = -1; | |
1585 | goto end_no_session; | |
1586 | } | |
1587 | ||
2f21a469 JR |
1588 | if (session->minor == 1) { |
1589 | /* For 2.1 */ | |
28ab034a | 1590 | ret = cmd_recv_stream_2_1(payload, &path_name, &channel_name); |
2f21a469 JR |
1591 | } else if (session->minor > 1 && session->minor < 11) { |
1592 | /* From 2.2 to 2.10 */ | |
28ab034a JG |
1593 | ret = cmd_recv_stream_2_2( |
1594 | payload, &path_name, &channel_name, &tracefile_size, &tracefile_count); | |
2f21a469 JR |
1595 | } else { |
1596 | /* From 2.11 to ... */ | |
28ab034a JG |
1597 | ret = cmd_recv_stream_2_11(payload, |
1598 | &path_name, | |
1599 | &channel_name, | |
1600 | &tracefile_size, | |
1601 | &tracefile_count, | |
1602 | &stream_chunk_id.value); | |
0b50e4b3 | 1603 | stream_chunk_id.is_set = true; |
0f907de1 | 1604 | } |
2f21a469 | 1605 | |
0f907de1 | 1606 | if (ret < 0) { |
7591bab1 | 1607 | goto send_reply; |
b8aa1682 JD |
1608 | } |
1609 | ||
348a81dc JG |
1610 | if (conform_channel_path(path_name)) { |
1611 | goto send_reply; | |
1612 | } | |
1613 | ||
2a635488 JR |
1614 | /* |
1615 | * Backward compatibility for --group-output-by-session. | |
1616 | * Prior to lttng 2.11, the complete path is passed by the stream. | |
1617 | * Starting at 2.11, lttng-relayd uses chunk. When dealing with producer | |
1618 | * >=2.11 the chunk is responsible for the output path. When dealing | |
1619 | * with producer < 2.11 the chunk output_path is the root output path | |
1620 | * and the stream carries the complete path (path_name). | |
1621 | * To support --group-output-by-session with older producer (<2.11), we | |
1622 | * need to craft the path based on the stream path. | |
1623 | */ | |
1624 | if (opt_group_output_by == RELAYD_GROUP_OUTPUT_BY_SESSION) { | |
1625 | if (conn->minor < 4) { | |
1626 | /* | |
1627 | * From 2.1 to 2.3, the session_name is not passed on | |
1628 | * the RELAYD_CREATE_SESSION command. The session name | |
1629 | * is necessary to detect the presence of a base_path | |
1630 | * inside the stream path. Without it we cannot perform | |
1631 | * a valid group-output-by-session transformation. | |
1632 | */ | |
1633 | WARN("Unable to perform a --group-by-session transformation for session %" PRIu64 | |
1634 | " for stream with path \"%s\" as it is produced by a peer using a protocol older than v2.4", | |
28ab034a JG |
1635 | session->id, |
1636 | path_name); | |
2a635488 JR |
1637 | } else if (conn->minor >= 4 && conn->minor < 11) { |
1638 | char *group_by_session_path_name; | |
1639 | ||
a0377dfe | 1640 | LTTNG_ASSERT(session->session_name[0] != '\0'); |
2a635488 | 1641 | |
28ab034a JG |
1642 | group_by_session_path_name = backward_compat_group_by_session( |
1643 | path_name, session->session_name, session->creation_time.value); | |
2a635488 JR |
1644 | if (!group_by_session_path_name) { |
1645 | ERR("Failed to apply group by session to stream of session %" PRIu64, | |
28ab034a | 1646 | session->id); |
2a635488 JR |
1647 | goto send_reply; |
1648 | } | |
1649 | ||
1650 | DBG("Transformed session path from \"%s\" to \"%s\" to honor per-session name grouping", | |
28ab034a JG |
1651 | path_name, |
1652 | group_by_session_path_name); | |
2a635488 JR |
1653 | |
1654 | free(path_name); | |
1655 | path_name = group_by_session_path_name; | |
1656 | } | |
1657 | } | |
1658 | ||
7591bab1 | 1659 | trace = ctf_trace_get_by_path_or_create(session, path_name); |
2a174661 | 1660 | if (!trace) { |
7591bab1 | 1661 | goto send_reply; |
2a174661 | 1662 | } |
2a174661 | 1663 | |
2a635488 | 1664 | /* This stream here has one reference on the trace. */ |
7591bab1 MD |
1665 | pthread_mutex_lock(&last_relay_stream_id_lock); |
1666 | stream_handle = ++last_relay_stream_id; | |
1667 | pthread_mutex_unlock(&last_relay_stream_id_lock); | |
d3e2ba59 | 1668 | |
7591bab1 | 1669 | /* We pass ownership of path_name and channel_name. */ |
28ab034a JG |
1670 | stream = stream_create( |
1671 | trace, stream_handle, path_name, channel_name, tracefile_size, tracefile_count); | |
cd9adb8b JG |
1672 | path_name = nullptr; |
1673 | channel_name = nullptr; | |
a4baae1b | 1674 | |
2a174661 | 1675 | /* |
7591bab1 MD |
1676 | * Streams are the owners of their trace. Reference to trace is |
1677 | * kept within stream_create(). | |
2a174661 | 1678 | */ |
7591bab1 | 1679 | ctf_trace_put(trace); |
d3e2ba59 | 1680 | |
7591bab1 | 1681 | send_reply: |
53efb85a | 1682 | memset(&reply, 0, sizeof(reply)); |
7591bab1 MD |
1683 | reply.handle = htobe64(stream_handle); |
1684 | if (!stream) { | |
f73fabfd | 1685 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 1686 | } else { |
f73fabfd | 1687 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1688 | } |
5af40280 | 1689 | |
28ab034a JG |
1690 | send_ret = conn->sock->ops->sendmsg( |
1691 | conn->sock, &reply, sizeof(struct lttcomm_relayd_status_stream), 0); | |
5312a3ed | 1692 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 1693 | ERR("Failed to send \"add stream\" command reply (ret = %zd)", send_ret); |
5312a3ed | 1694 | ret = -1; |
b8aa1682 JD |
1695 | } |
1696 | ||
1697 | end_no_session: | |
7591bab1 MD |
1698 | free(path_name); |
1699 | free(channel_name); | |
0f907de1 | 1700 | return ret; |
b8aa1682 JD |
1701 | } |
1702 | ||
173af62f DG |
1703 | /* |
1704 | * relay_close_stream: close a specific stream | |
1705 | */ | |
28ab034a JG |
1706 | static int relay_close_stream(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
1707 | struct relay_connection *conn, | |
1708 | const struct lttng_buffer_view *payload) | |
173af62f | 1709 | { |
5312a3ed JG |
1710 | int ret; |
1711 | ssize_t send_ret; | |
58eb9381 | 1712 | struct relay_session *session = conn->session; |
173af62f DG |
1713 | struct lttcomm_relayd_close_stream stream_info; |
1714 | struct lttcomm_relayd_generic_reply reply; | |
1715 | struct relay_stream *stream; | |
173af62f DG |
1716 | |
1717 | DBG("Close stream received"); | |
1718 | ||
5312a3ed | 1719 | if (!session || !conn->version_check_done) { |
173af62f DG |
1720 | ERR("Trying to close a stream before version check"); |
1721 | ret = -1; | |
1722 | goto end_no_session; | |
1723 | } | |
1724 | ||
5312a3ed JG |
1725 | if (payload->size < sizeof(stream_info)) { |
1726 | ERR("Unexpected payload size in \"relay_close_stream\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
1727 | sizeof(stream_info), |
1728 | payload->size); | |
173af62f DG |
1729 | ret = -1; |
1730 | goto end_no_session; | |
1731 | } | |
5312a3ed JG |
1732 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1733 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1734 | stream_info.last_net_seq_num = be64toh(stream_info.last_net_seq_num); | |
173af62f | 1735 | |
5312a3ed | 1736 | stream = stream_get_by_id(stream_info.stream_id); |
173af62f DG |
1737 | if (!stream) { |
1738 | ret = -1; | |
7591bab1 | 1739 | goto end; |
173af62f | 1740 | } |
77f7bd85 MD |
1741 | |
1742 | /* | |
1743 | * Set last_net_seq_num before the close flag. Required by data | |
1744 | * pending check. | |
1745 | */ | |
7591bab1 | 1746 | pthread_mutex_lock(&stream->lock); |
5312a3ed | 1747 | stream->last_net_seq_num = stream_info.last_net_seq_num; |
77f7bd85 MD |
1748 | pthread_mutex_unlock(&stream->lock); |
1749 | ||
bda7c7b9 JG |
1750 | /* |
1751 | * This is one of the conditions which may trigger a stream close | |
1752 | * with the others being: | |
1753 | * 1) A close command is received for a stream | |
1754 | * 2) The control connection owning the stream is closed | |
1755 | * 3) We have received all of the stream's data _after_ a close | |
1756 | * request. | |
1757 | */ | |
1758 | try_stream_close(stream); | |
7591bab1 | 1759 | stream_put(stream); |
5312a3ed | 1760 | ret = 0; |
173af62f | 1761 | |
7591bab1 | 1762 | end: |
53efb85a | 1763 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1764 | if (ret < 0) { |
f73fabfd | 1765 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1766 | } else { |
f73fabfd | 1767 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1768 | } |
28ab034a JG |
1769 | send_ret = conn->sock->ops->sendmsg( |
1770 | conn->sock, &reply, sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed | 1771 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 1772 | ERR("Failed to send \"close stream\" command reply (ret = %zd)", send_ret); |
5312a3ed | 1773 | ret = -1; |
173af62f DG |
1774 | } |
1775 | ||
1776 | end_no_session: | |
1777 | return ret; | |
1778 | } | |
1779 | ||
93ec662e JD |
1780 | /* |
1781 | * relay_reset_metadata: reset a metadata stream | |
1782 | */ | |
28ab034a JG |
1783 | static int relay_reset_metadata(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
1784 | struct relay_connection *conn, | |
1785 | const struct lttng_buffer_view *payload) | |
93ec662e | 1786 | { |
5312a3ed JG |
1787 | int ret; |
1788 | ssize_t send_ret; | |
93ec662e JD |
1789 | struct relay_session *session = conn->session; |
1790 | struct lttcomm_relayd_reset_metadata stream_info; | |
1791 | struct lttcomm_relayd_generic_reply reply; | |
1792 | struct relay_stream *stream; | |
1793 | ||
1794 | DBG("Reset metadata received"); | |
1795 | ||
5312a3ed | 1796 | if (!session || !conn->version_check_done) { |
93ec662e JD |
1797 | ERR("Trying to reset a metadata stream before version check"); |
1798 | ret = -1; | |
1799 | goto end_no_session; | |
1800 | } | |
1801 | ||
5312a3ed JG |
1802 | if (payload->size < sizeof(stream_info)) { |
1803 | ERR("Unexpected payload size in \"relay_reset_metadata\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
1804 | sizeof(stream_info), |
1805 | payload->size); | |
93ec662e JD |
1806 | ret = -1; |
1807 | goto end_no_session; | |
1808 | } | |
5312a3ed JG |
1809 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1810 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1811 | stream_info.version = be64toh(stream_info.version); | |
1812 | ||
1813 | DBG("Update metadata to version %" PRIu64, stream_info.version); | |
93ec662e JD |
1814 | |
1815 | /* Unsupported for live sessions for now. */ | |
1816 | if (session->live_timer != 0) { | |
1817 | ret = -1; | |
1818 | goto end; | |
1819 | } | |
1820 | ||
5312a3ed | 1821 | stream = stream_get_by_id(stream_info.stream_id); |
93ec662e JD |
1822 | if (!stream) { |
1823 | ret = -1; | |
1824 | goto end; | |
1825 | } | |
1826 | pthread_mutex_lock(&stream->lock); | |
1827 | if (!stream->is_metadata) { | |
1828 | ret = -1; | |
1829 | goto end_unlock; | |
1830 | } | |
1831 | ||
c35f9726 | 1832 | ret = stream_reset_file(stream); |
93ec662e | 1833 | if (ret < 0) { |
28ab034a JG |
1834 | ERR("Failed to reset metadata stream %" PRIu64 ": stream_path = %s, channel = %s", |
1835 | stream->stream_handle, | |
1836 | stream->path_name, | |
1837 | stream->channel_name); | |
93ec662e JD |
1838 | goto end_unlock; |
1839 | } | |
93ec662e JD |
1840 | end_unlock: |
1841 | pthread_mutex_unlock(&stream->lock); | |
1842 | stream_put(stream); | |
1843 | ||
1844 | end: | |
1845 | memset(&reply, 0, sizeof(reply)); | |
1846 | if (ret < 0) { | |
1847 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1848 | } else { | |
1849 | reply.ret_code = htobe32(LTTNG_OK); | |
1850 | } | |
28ab034a JG |
1851 | send_ret = conn->sock->ops->sendmsg( |
1852 | conn->sock, &reply, sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed | 1853 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 1854 | ERR("Failed to send \"reset metadata\" command reply (ret = %zd)", send_ret); |
5312a3ed | 1855 | ret = -1; |
93ec662e JD |
1856 | } |
1857 | ||
1858 | end_no_session: | |
1859 | return ret; | |
1860 | } | |
1861 | ||
b8aa1682 JD |
1862 | /* |
1863 | * relay_unknown_command: send -1 if received unknown command | |
1864 | */ | |
7591bab1 | 1865 | static void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1866 | { |
1867 | struct lttcomm_relayd_generic_reply reply; | |
5312a3ed | 1868 | ssize_t send_ret; |
b8aa1682 | 1869 | |
53efb85a | 1870 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1871 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5312a3ed JG |
1872 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1873 | if (send_ret < sizeof(reply)) { | |
1874 | ERR("Failed to send \"unknown command\" command reply (ret = %zd)", send_ret); | |
b8aa1682 JD |
1875 | } |
1876 | } | |
1877 | ||
1878 | /* | |
1879 | * relay_start: send an acknowledgment to the client to tell if we are | |
1880 | * ready to receive data. We are ready if a session is established. | |
1881 | */ | |
28ab034a JG |
1882 | static int relay_start(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
1883 | struct relay_connection *conn, | |
1884 | const struct lttng_buffer_view *payload __attribute__((unused))) | |
b8aa1682 | 1885 | { |
5312a3ed JG |
1886 | int ret = 0; |
1887 | ssize_t send_ret; | |
b8aa1682 | 1888 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1889 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1890 | |
1891 | if (!session) { | |
1892 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1893 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1894 | } |
1895 | ||
53efb85a | 1896 | memset(&reply, 0, sizeof(reply)); |
5312a3ed | 1897 | reply.ret_code = htobe32(LTTNG_OK); |
28ab034a | 1898 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed | 1899 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 1900 | ERR("Failed to send \"relay_start\" command reply (ret = %zd)", send_ret); |
5312a3ed | 1901 | ret = -1; |
b8aa1682 JD |
1902 | } |
1903 | ||
1904 | return ret; | |
1905 | } | |
1906 | ||
b8aa1682 | 1907 | /* |
7591bab1 | 1908 | * relay_recv_metadata: receive the metadata for the session. |
b8aa1682 | 1909 | */ |
5312a3ed | 1910 | static int relay_recv_metadata(const struct lttcomm_relayd_hdr *recv_hdr, |
28ab034a JG |
1911 | struct relay_connection *conn, |
1912 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1913 | { |
32d1569c | 1914 | int ret = 0; |
58eb9381 | 1915 | struct relay_session *session = conn->session; |
5312a3ed | 1916 | struct lttcomm_relayd_metadata_payload metadata_payload_header; |
b8aa1682 | 1917 | struct relay_stream *metadata_stream; |
5312a3ed | 1918 | uint64_t metadata_payload_size; |
c35f9726 | 1919 | struct lttng_buffer_view packet_view; |
b8aa1682 JD |
1920 | |
1921 | if (!session) { | |
1922 | ERR("Metadata sent before version check"); | |
1923 | ret = -1; | |
1924 | goto end; | |
1925 | } | |
1926 | ||
5312a3ed | 1927 | if (recv_hdr->data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { |
f6416125 MD |
1928 | ERR("Incorrect data size"); |
1929 | ret = -1; | |
1930 | goto end; | |
1931 | } | |
28ab034a JG |
1932 | metadata_payload_size = |
1933 | recv_hdr->data_size - sizeof(struct lttcomm_relayd_metadata_payload); | |
f6416125 | 1934 | |
28ab034a JG |
1935 | memcpy(&metadata_payload_header, payload->data, sizeof(metadata_payload_header)); |
1936 | metadata_payload_header.stream_id = be64toh(metadata_payload_header.stream_id); | |
1937 | metadata_payload_header.padding_size = be32toh(metadata_payload_header.padding_size); | |
9d1bbf21 | 1938 | |
5312a3ed | 1939 | metadata_stream = stream_get_by_id(metadata_payload_header.stream_id); |
b8aa1682 JD |
1940 | if (!metadata_stream) { |
1941 | ret = -1; | |
7591bab1 | 1942 | goto end; |
b8aa1682 JD |
1943 | } |
1944 | ||
28ab034a JG |
1945 | packet_view = lttng_buffer_view_from_view( |
1946 | payload, sizeof(metadata_payload_header), metadata_payload_size); | |
3e6e0df2 | 1947 | if (!lttng_buffer_view_is_valid(&packet_view)) { |
c35f9726 | 1948 | ERR("Invalid metadata packet length announced by header"); |
b8aa1682 | 1949 | ret = -1; |
7591bab1 | 1950 | goto end_put; |
b8aa1682 | 1951 | } |
1d4dfdef | 1952 | |
c35f9726 | 1953 | pthread_mutex_lock(&metadata_stream->lock); |
28ab034a | 1954 | ret = stream_write(metadata_stream, &packet_view, metadata_payload_header.padding_size); |
c35f9726 | 1955 | pthread_mutex_unlock(&metadata_stream->lock); |
28ab034a | 1956 | if (ret) { |
5312a3ed | 1957 | ret = -1; |
7591bab1 | 1958 | goto end_put; |
1d4dfdef | 1959 | } |
7591bab1 | 1960 | end_put: |
7591bab1 | 1961 | stream_put(metadata_stream); |
b8aa1682 JD |
1962 | end: |
1963 | return ret; | |
1964 | } | |
1965 | ||
1966 | /* | |
1967 | * relay_send_version: send relayd version number | |
1968 | */ | |
28ab034a JG |
1969 | static int relay_send_version(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
1970 | struct relay_connection *conn, | |
1971 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1972 | { |
7f51dcba | 1973 | int ret; |
5312a3ed | 1974 | ssize_t send_ret; |
092b6259 | 1975 | struct lttcomm_relayd_version reply, msg; |
87cb6359 | 1976 | bool compatible = true; |
b8aa1682 | 1977 | |
5312a3ed | 1978 | conn->version_check_done = true; |
b8aa1682 | 1979 | |
092b6259 | 1980 | /* Get version from the other side. */ |
5312a3ed JG |
1981 | if (payload->size < sizeof(msg)) { |
1982 | ERR("Unexpected payload size in \"relay_send_version\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
1983 | sizeof(msg), |
1984 | payload->size); | |
092b6259 | 1985 | ret = -1; |
092b6259 DG |
1986 | goto end; |
1987 | } | |
1988 | ||
5312a3ed JG |
1989 | memcpy(&msg, payload->data, sizeof(msg)); |
1990 | msg.major = be32toh(msg.major); | |
1991 | msg.minor = be32toh(msg.minor); | |
1992 | ||
53efb85a | 1993 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
1994 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
1995 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
1996 | |
1997 | /* Major versions must be the same */ | |
5312a3ed | 1998 | if (reply.major != msg.major) { |
6151a90f | 1999 | DBG("Incompatible major versions (%u vs %u), deleting session", |
28ab034a JG |
2000 | reply.major, |
2001 | msg.major); | |
87cb6359 | 2002 | compatible = false; |
d4519fa3 JD |
2003 | } |
2004 | ||
58eb9381 | 2005 | conn->major = reply.major; |
0f907de1 | 2006 | /* We adapt to the lowest compatible version */ |
5312a3ed | 2007 | if (reply.minor <= msg.minor) { |
58eb9381 | 2008 | conn->minor = reply.minor; |
0f907de1 | 2009 | } else { |
5312a3ed | 2010 | conn->minor = msg.minor; |
0f907de1 JD |
2011 | } |
2012 | ||
6151a90f JD |
2013 | reply.major = htobe32(reply.major); |
2014 | reply.minor = htobe32(reply.minor); | |
28ab034a | 2015 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed | 2016 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 2017 | ERR("Failed to send \"send version\" command reply (ret = %zd)", send_ret); |
5312a3ed JG |
2018 | ret = -1; |
2019 | goto end; | |
2020 | } else { | |
2021 | ret = 0; | |
6151a90f JD |
2022 | } |
2023 | ||
87cb6359 JD |
2024 | if (!compatible) { |
2025 | ret = -1; | |
2026 | goto end; | |
2027 | } | |
2028 | ||
28ab034a | 2029 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
b8aa1682 JD |
2030 | |
2031 | end: | |
2032 | return ret; | |
2033 | } | |
2034 | ||
c8f59ee5 | 2035 | /* |
6d805429 | 2036 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 | 2037 | */ |
28ab034a JG |
2038 | static int relay_data_pending(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
2039 | struct relay_connection *conn, | |
2040 | const struct lttng_buffer_view *payload) | |
c8f59ee5 | 2041 | { |
58eb9381 | 2042 | struct relay_session *session = conn->session; |
6d805429 | 2043 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
2044 | struct lttcomm_relayd_generic_reply reply; |
2045 | struct relay_stream *stream; | |
5312a3ed | 2046 | ssize_t send_ret; |
c8f59ee5 | 2047 | int ret; |
298a25ca | 2048 | uint64_t stream_seq; |
c8f59ee5 | 2049 | |
6d805429 | 2050 | DBG("Data pending command received"); |
c8f59ee5 | 2051 | |
5312a3ed | 2052 | if (!session || !conn->version_check_done) { |
c8f59ee5 DG |
2053 | ERR("Trying to check for data before version check"); |
2054 | ret = -1; | |
2055 | goto end_no_session; | |
2056 | } | |
2057 | ||
5312a3ed JG |
2058 | if (payload->size < sizeof(msg)) { |
2059 | ERR("Unexpected payload size in \"relay_data_pending\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
2060 | sizeof(msg), |
2061 | payload->size); | |
c8f59ee5 DG |
2062 | ret = -1; |
2063 | goto end_no_session; | |
2064 | } | |
5312a3ed JG |
2065 | memcpy(&msg, payload->data, sizeof(msg)); |
2066 | msg.stream_id = be64toh(msg.stream_id); | |
2067 | msg.last_net_seq_num = be64toh(msg.last_net_seq_num); | |
c8f59ee5 | 2068 | |
5312a3ed | 2069 | stream = stream_get_by_id(msg.stream_id); |
cd9adb8b | 2070 | if (stream == nullptr) { |
c8f59ee5 | 2071 | ret = -1; |
7591bab1 | 2072 | goto end; |
c8f59ee5 DG |
2073 | } |
2074 | ||
7591bab1 MD |
2075 | pthread_mutex_lock(&stream->lock); |
2076 | ||
298a25ca JG |
2077 | if (session_streams_have_index(session)) { |
2078 | /* | |
2079 | * Ensure that both the index and stream data have been | |
2080 | * flushed up to the requested point. | |
2081 | */ | |
ac497a37 | 2082 | stream_seq = std::min(stream->prev_data_seq, stream->prev_index_seq); |
298a25ca | 2083 | } else { |
a8f9f353 | 2084 | stream_seq = stream->prev_data_seq; |
298a25ca | 2085 | } |
a8f9f353 | 2086 | DBG("Data pending for stream id %" PRIu64 ": prev_data_seq %" PRIu64 |
28ab034a JG |
2087 | ", prev_index_seq %" PRIu64 ", and last_seq %" PRIu64, |
2088 | msg.stream_id, | |
2089 | stream->prev_data_seq, | |
2090 | stream->prev_index_seq, | |
2091 | msg.last_net_seq_num); | |
c8f59ee5 | 2092 | |
33832e64 | 2093 | /* Avoid wrapping issue */ |
298a25ca | 2094 | if (((int64_t) (stream_seq - msg.last_net_seq_num)) >= 0) { |
6d805429 | 2095 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 2096 | ret = 0; |
6d805429 DG |
2097 | } else { |
2098 | /* Data still being streamed thus pending */ | |
2099 | ret = 1; | |
c8f59ee5 DG |
2100 | } |
2101 | ||
7591bab1 MD |
2102 | stream->data_pending_check_done = true; |
2103 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 2104 | |
7591bab1 MD |
2105 | stream_put(stream); |
2106 | end: | |
c8f59ee5 | 2107 | |
53efb85a | 2108 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 2109 | reply.ret_code = htobe32(ret); |
5312a3ed JG |
2110 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2111 | if (send_ret < (ssize_t) sizeof(reply)) { | |
28ab034a | 2112 | ERR("Failed to send \"data pending\" command reply (ret = %zd)", send_ret); |
5312a3ed | 2113 | ret = -1; |
c8f59ee5 DG |
2114 | } |
2115 | ||
2116 | end_no_session: | |
2117 | return ret; | |
2118 | } | |
2119 | ||
2120 | /* | |
2121 | * Wait for the control socket to reach a quiescent state. | |
2122 | * | |
7591bab1 MD |
2123 | * Note that for now, when receiving this command from the session |
2124 | * daemon, this means that every subsequent commands or data received on | |
2125 | * the control socket has been handled. So, this is why we simply return | |
2126 | * OK here. | |
c8f59ee5 | 2127 | */ |
28ab034a JG |
2128 | static int relay_quiescent_control(const struct lttcomm_relayd_hdr *recv_hdr |
2129 | __attribute__((unused)), | |
2130 | struct relay_connection *conn, | |
2131 | const struct lttng_buffer_view *payload) | |
c8f59ee5 DG |
2132 | { |
2133 | int ret; | |
5312a3ed | 2134 | ssize_t send_ret; |
ad7051c0 | 2135 | struct relay_stream *stream; |
ad7051c0 | 2136 | struct lttcomm_relayd_quiescent_control msg; |
c8f59ee5 DG |
2137 | struct lttcomm_relayd_generic_reply reply; |
2138 | ||
2139 | DBG("Checking quiescent state on control socket"); | |
2140 | ||
5312a3ed | 2141 | if (!conn->session || !conn->version_check_done) { |
ad7051c0 DG |
2142 | ERR("Trying to check for data before version check"); |
2143 | ret = -1; | |
2144 | goto end_no_session; | |
2145 | } | |
2146 | ||
5312a3ed JG |
2147 | if (payload->size < sizeof(msg)) { |
2148 | ERR("Unexpected payload size in \"relay_quiescent_control\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
2149 | sizeof(msg), |
2150 | payload->size); | |
ad7051c0 DG |
2151 | ret = -1; |
2152 | goto end_no_session; | |
2153 | } | |
5312a3ed JG |
2154 | memcpy(&msg, payload->data, sizeof(msg)); |
2155 | msg.stream_id = be64toh(msg.stream_id); | |
ad7051c0 | 2156 | |
5312a3ed | 2157 | stream = stream_get_by_id(msg.stream_id); |
7591bab1 MD |
2158 | if (!stream) { |
2159 | goto reply; | |
2160 | } | |
2161 | pthread_mutex_lock(&stream->lock); | |
2162 | stream->data_pending_check_done = true; | |
2163 | pthread_mutex_unlock(&stream->lock); | |
5312a3ed JG |
2164 | |
2165 | DBG("Relay quiescent control pending flag set to %" PRIu64, msg.stream_id); | |
7591bab1 MD |
2166 | stream_put(stream); |
2167 | reply: | |
53efb85a | 2168 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 2169 | reply.ret_code = htobe32(LTTNG_OK); |
5312a3ed JG |
2170 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2171 | if (send_ret < (ssize_t) sizeof(reply)) { | |
28ab034a | 2172 | ERR("Failed to send \"quiescent control\" command reply (ret = %zd)", send_ret); |
5312a3ed JG |
2173 | ret = -1; |
2174 | } else { | |
2175 | ret = 0; | |
c8f59ee5 DG |
2176 | } |
2177 | ||
ad7051c0 | 2178 | end_no_session: |
c8f59ee5 DG |
2179 | return ret; |
2180 | } | |
2181 | ||
f7079f67 | 2182 | /* |
7591bab1 MD |
2183 | * Initialize a data pending command. This means that a consumer is about |
2184 | * to ask for data pending for each stream it holds. Simply iterate over | |
2185 | * all streams of a session and set the data_pending_check_done flag. | |
f7079f67 DG |
2186 | * |
2187 | * This command returns to the client a LTTNG_OK code. | |
2188 | */ | |
5312a3ed | 2189 | static int relay_begin_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
28ab034a JG |
2190 | struct relay_connection *conn, |
2191 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
2192 | { |
2193 | int ret; | |
5312a3ed | 2194 | ssize_t send_ret; |
f7079f67 DG |
2195 | struct lttng_ht_iter iter; |
2196 | struct lttcomm_relayd_begin_data_pending msg; | |
2197 | struct lttcomm_relayd_generic_reply reply; | |
2198 | struct relay_stream *stream; | |
f7079f67 | 2199 | |
a0377dfe FD |
2200 | LTTNG_ASSERT(recv_hdr); |
2201 | LTTNG_ASSERT(conn); | |
f7079f67 DG |
2202 | |
2203 | DBG("Init streams for data pending"); | |
2204 | ||
5312a3ed | 2205 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
2206 | ERR("Trying to check for data before version check"); |
2207 | ret = -1; | |
2208 | goto end_no_session; | |
2209 | } | |
2210 | ||
5312a3ed JG |
2211 | if (payload->size < sizeof(msg)) { |
2212 | ERR("Unexpected payload size in \"relay_begin_data_pending\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
2213 | sizeof(msg), |
2214 | payload->size); | |
f7079f67 DG |
2215 | ret = -1; |
2216 | goto end_no_session; | |
2217 | } | |
5312a3ed JG |
2218 | memcpy(&msg, payload->data, sizeof(msg)); |
2219 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 DG |
2220 | |
2221 | /* | |
7591bab1 MD |
2222 | * Iterate over all streams to set the begin data pending flag. |
2223 | * For now, the streams are indexed by stream handle so we have | |
2224 | * to iterate over all streams to find the one associated with | |
2225 | * the right session_id. | |
f7079f67 DG |
2226 | */ |
2227 | rcu_read_lock(); | |
28ab034a | 2228 | cds_lfht_for_each_entry (relay_streams_ht->ht, &iter.iter, stream, node.node) { |
7591bab1 MD |
2229 | if (!stream_get(stream)) { |
2230 | continue; | |
2231 | } | |
5312a3ed | 2232 | if (stream->trace->session->id == msg.session_id) { |
7591bab1 MD |
2233 | pthread_mutex_lock(&stream->lock); |
2234 | stream->data_pending_check_done = false; | |
2235 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 2236 | DBG("Set begin data pending flag to stream %" PRIu64, |
28ab034a | 2237 | stream->stream_handle); |
f7079f67 | 2238 | } |
7591bab1 | 2239 | stream_put(stream); |
f7079f67 DG |
2240 | } |
2241 | rcu_read_unlock(); | |
2242 | ||
53efb85a | 2243 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
2244 | /* All good, send back reply. */ |
2245 | reply.ret_code = htobe32(LTTNG_OK); | |
2246 | ||
5312a3ed JG |
2247 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2248 | if (send_ret < (ssize_t) sizeof(reply)) { | |
28ab034a | 2249 | ERR("Failed to send \"begin data pending\" command reply (ret = %zd)", send_ret); |
5312a3ed JG |
2250 | ret = -1; |
2251 | } else { | |
2252 | ret = 0; | |
f7079f67 DG |
2253 | } |
2254 | ||
2255 | end_no_session: | |
2256 | return ret; | |
2257 | } | |
2258 | ||
2259 | /* | |
7591bab1 MD |
2260 | * End data pending command. This will check, for a given session id, if |
2261 | * each stream associated with it has its data_pending_check_done flag | |
2262 | * set. If not, this means that the client lost track of the stream but | |
2263 | * the data is still being streamed on our side. In this case, we inform | |
2264 | * the client that data is in flight. | |
f7079f67 DG |
2265 | * |
2266 | * Return to the client if there is data in flight or not with a ret_code. | |
2267 | */ | |
28ab034a JG |
2268 | static int relay_end_data_pending(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
2269 | struct relay_connection *conn, | |
2270 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
2271 | { |
2272 | int ret; | |
5312a3ed | 2273 | ssize_t send_ret; |
f7079f67 DG |
2274 | struct lttng_ht_iter iter; |
2275 | struct lttcomm_relayd_end_data_pending msg; | |
2276 | struct lttcomm_relayd_generic_reply reply; | |
2277 | struct relay_stream *stream; | |
f7079f67 DG |
2278 | uint32_t is_data_inflight = 0; |
2279 | ||
f7079f67 DG |
2280 | DBG("End data pending command"); |
2281 | ||
5312a3ed | 2282 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
2283 | ERR("Trying to check for data before version check"); |
2284 | ret = -1; | |
2285 | goto end_no_session; | |
2286 | } | |
2287 | ||
5312a3ed JG |
2288 | if (payload->size < sizeof(msg)) { |
2289 | ERR("Unexpected payload size in \"relay_end_data_pending\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
2290 | sizeof(msg), |
2291 | payload->size); | |
f7079f67 DG |
2292 | ret = -1; |
2293 | goto end_no_session; | |
2294 | } | |
5312a3ed JG |
2295 | memcpy(&msg, payload->data, sizeof(msg)); |
2296 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 | 2297 | |
7591bab1 MD |
2298 | /* |
2299 | * Iterate over all streams to see if the begin data pending | |
2300 | * flag is set. | |
2301 | */ | |
f7079f67 | 2302 | rcu_read_lock(); |
28ab034a | 2303 | cds_lfht_for_each_entry (relay_streams_ht->ht, &iter.iter, stream, node.node) { |
7591bab1 MD |
2304 | if (!stream_get(stream)) { |
2305 | continue; | |
2306 | } | |
5312a3ed | 2307 | if (stream->trace->session->id != msg.session_id) { |
7591bab1 MD |
2308 | stream_put(stream); |
2309 | continue; | |
2310 | } | |
2311 | pthread_mutex_lock(&stream->lock); | |
2312 | if (!stream->data_pending_check_done) { | |
298a25ca JG |
2313 | uint64_t stream_seq; |
2314 | ||
2315 | if (session_streams_have_index(conn->session)) { | |
2316 | /* | |
2317 | * Ensure that both the index and stream data have been | |
2318 | * flushed up to the requested point. | |
2319 | */ | |
28ab034a JG |
2320 | stream_seq = |
2321 | std::min(stream->prev_data_seq, stream->prev_index_seq); | |
298a25ca | 2322 | } else { |
a8f9f353 | 2323 | stream_seq = stream->prev_data_seq; |
298a25ca | 2324 | } |
28ab034a JG |
2325 | if (!stream->closed || |
2326 | !(((int64_t) (stream_seq - stream->last_net_seq_num)) >= 0)) { | |
7591bab1 MD |
2327 | is_data_inflight = 1; |
2328 | DBG("Data is still in flight for stream %" PRIu64, | |
28ab034a | 2329 | stream->stream_handle); |
7591bab1 MD |
2330 | pthread_mutex_unlock(&stream->lock); |
2331 | stream_put(stream); | |
2332 | break; | |
2333 | } | |
f7079f67 | 2334 | } |
7591bab1 MD |
2335 | pthread_mutex_unlock(&stream->lock); |
2336 | stream_put(stream); | |
f7079f67 DG |
2337 | } |
2338 | rcu_read_unlock(); | |
2339 | ||
53efb85a | 2340 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
2341 | /* All good, send back reply. */ |
2342 | reply.ret_code = htobe32(is_data_inflight); | |
2343 | ||
5312a3ed JG |
2344 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2345 | if (send_ret < (ssize_t) sizeof(reply)) { | |
28ab034a | 2346 | ERR("Failed to send \"end data pending\" command reply (ret = %zd)", send_ret); |
5312a3ed JG |
2347 | ret = -1; |
2348 | } else { | |
2349 | ret = 0; | |
f7079f67 DG |
2350 | } |
2351 | ||
2352 | end_no_session: | |
2353 | return ret; | |
2354 | } | |
2355 | ||
1c20f0e2 JD |
2356 | /* |
2357 | * Receive an index for a specific stream. | |
2358 | * | |
2359 | * Return 0 on success else a negative value. | |
2360 | */ | |
28ab034a JG |
2361 | static int relay_recv_index(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
2362 | struct relay_connection *conn, | |
2363 | const struct lttng_buffer_view *payload) | |
1c20f0e2 | 2364 | { |
5312a3ed JG |
2365 | int ret; |
2366 | ssize_t send_ret; | |
58eb9381 | 2367 | struct relay_session *session = conn->session; |
1c20f0e2 | 2368 | struct lttcomm_relayd_index index_info; |
1c20f0e2 JD |
2369 | struct lttcomm_relayd_generic_reply reply; |
2370 | struct relay_stream *stream; | |
f8f3885c | 2371 | size_t msg_len; |
1c20f0e2 | 2372 | |
a0377dfe | 2373 | LTTNG_ASSERT(conn); |
1c20f0e2 JD |
2374 | |
2375 | DBG("Relay receiving index"); | |
2376 | ||
5312a3ed | 2377 | if (!session || !conn->version_check_done) { |
1c20f0e2 JD |
2378 | ERR("Trying to close a stream before version check"); |
2379 | ret = -1; | |
2380 | goto end_no_session; | |
2381 | } | |
2382 | ||
28ab034a JG |
2383 | msg_len = lttcomm_relayd_index_len(lttng_to_index_major(conn->major, conn->minor), |
2384 | lttng_to_index_minor(conn->major, conn->minor)); | |
5312a3ed JG |
2385 | if (payload->size < msg_len) { |
2386 | ERR("Unexpected payload size in \"relay_recv_index\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
2387 | msg_len, |
2388 | payload->size); | |
1c20f0e2 JD |
2389 | ret = -1; |
2390 | goto end_no_session; | |
2391 | } | |
5312a3ed JG |
2392 | memcpy(&index_info, payload->data, msg_len); |
2393 | index_info.relay_stream_id = be64toh(index_info.relay_stream_id); | |
2394 | index_info.net_seq_num = be64toh(index_info.net_seq_num); | |
2395 | index_info.packet_size = be64toh(index_info.packet_size); | |
2396 | index_info.content_size = be64toh(index_info.content_size); | |
2397 | index_info.timestamp_begin = be64toh(index_info.timestamp_begin); | |
2398 | index_info.timestamp_end = be64toh(index_info.timestamp_end); | |
2399 | index_info.events_discarded = be64toh(index_info.events_discarded); | |
2400 | index_info.stream_id = be64toh(index_info.stream_id); | |
81df238b JR |
2401 | |
2402 | if (conn->minor >= 8) { | |
28ab034a | 2403 | index_info.stream_instance_id = be64toh(index_info.stream_instance_id); |
81df238b | 2404 | index_info.packet_seq_num = be64toh(index_info.packet_seq_num); |
0f83d1cc MD |
2405 | } else { |
2406 | index_info.stream_instance_id = -1ULL; | |
2407 | index_info.packet_seq_num = -1ULL; | |
81df238b | 2408 | } |
5312a3ed JG |
2409 | |
2410 | stream = stream_get_by_id(index_info.relay_stream_id); | |
1c20f0e2 | 2411 | if (!stream) { |
7591bab1 | 2412 | ERR("stream_get_by_id not found"); |
1c20f0e2 | 2413 | ret = -1; |
7591bab1 | 2414 | goto end; |
1c20f0e2 | 2415 | } |
d3e2ba59 | 2416 | |
c35f9726 JG |
2417 | pthread_mutex_lock(&stream->lock); |
2418 | ret = stream_add_index(stream, &index_info); | |
2419 | pthread_mutex_unlock(&stream->lock); | |
2420 | if (ret) { | |
7591bab1 MD |
2421 | goto end_stream_put; |
2422 | } | |
1c20f0e2 | 2423 | |
7591bab1 | 2424 | end_stream_put: |
7591bab1 | 2425 | stream_put(stream); |
7591bab1 | 2426 | end: |
53efb85a | 2427 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
2428 | if (ret < 0) { |
2429 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
2430 | } else { | |
2431 | reply.ret_code = htobe32(LTTNG_OK); | |
2432 | } | |
58eb9381 | 2433 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed JG |
2434 | if (send_ret < (ssize_t) sizeof(reply)) { |
2435 | ERR("Failed to send \"recv index\" command reply (ret = %zd)", send_ret); | |
2436 | ret = -1; | |
1c20f0e2 JD |
2437 | } |
2438 | ||
2439 | end_no_session: | |
2440 | return ret; | |
2441 | } | |
2442 | ||
a4baae1b JD |
2443 | /* |
2444 | * Receive the streams_sent message. | |
2445 | * | |
2446 | * Return 0 on success else a negative value. | |
2447 | */ | |
28ab034a JG |
2448 | static int relay_streams_sent(const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
2449 | struct relay_connection *conn, | |
2450 | const struct lttng_buffer_view *payload __attribute__((unused))) | |
a4baae1b | 2451 | { |
5312a3ed JG |
2452 | int ret; |
2453 | ssize_t send_ret; | |
a4baae1b JD |
2454 | struct lttcomm_relayd_generic_reply reply; |
2455 | ||
a0377dfe | 2456 | LTTNG_ASSERT(conn); |
a4baae1b JD |
2457 | |
2458 | DBG("Relay receiving streams_sent"); | |
2459 | ||
5312a3ed | 2460 | if (!conn->session || !conn->version_check_done) { |
a4baae1b JD |
2461 | ERR("Trying to close a stream before version check"); |
2462 | ret = -1; | |
2463 | goto end_no_session; | |
2464 | } | |
2465 | ||
2466 | /* | |
7591bab1 MD |
2467 | * Publish every pending stream in the connection recv list which are |
2468 | * now ready to be used by the viewer. | |
4a9daf17 | 2469 | */ |
7591bab1 | 2470 | publish_connection_local_streams(conn); |
4a9daf17 | 2471 | |
53efb85a | 2472 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2473 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2474 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed | 2475 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 2476 | ERR("Failed to send \"streams sent\" command reply (ret = %zd)", send_ret); |
5312a3ed | 2477 | ret = -1; |
a4baae1b JD |
2478 | } else { |
2479 | /* Success. */ | |
2480 | ret = 0; | |
2481 | } | |
2482 | ||
2483 | end_no_session: | |
2484 | return ret; | |
2485 | } | |
2486 | ||
28ab034a JG |
2487 | static ssize_t |
2488 | relay_unpack_rotate_streams_header(const struct lttng_buffer_view *payload, | |
2489 | struct lttcomm_relayd_rotate_streams *_rotate_streams) | |
ce9dbd47 JG |
2490 | { |
2491 | struct lttcomm_relayd_rotate_streams rotate_streams; | |
2492 | /* | |
2493 | * Set to the smallest version (packed) of `lttcomm_relayd_rotate_streams`. | |
2494 | * This is the smallest version of this structure, but it can be larger; | |
2495 | * this variable is updated once the proper size of the structure is known. | |
2496 | * | |
2497 | * See comment at the declaration of this structure for more information. | |
2498 | */ | |
2499 | ssize_t header_len = sizeof(struct lttcomm_relayd_rotate_streams_packed); | |
28ab034a | 2500 | size_t expected_payload_size_no_padding, expected_payload_size_3_bytes_padding, |
ce9dbd47 JG |
2501 | expected_payload_size_7_bytes_padding; |
2502 | ||
2503 | if (payload->size < header_len) { | |
2504 | ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected >= %zu bytes, got %zu bytes", | |
28ab034a JG |
2505 | header_len, |
2506 | payload->size); | |
ce9dbd47 JG |
2507 | goto error; |
2508 | } | |
2509 | ||
2510 | /* | |
2511 | * Some versions incorrectly omitted the LTTNG_PACKED annotation on the | |
2512 | * `new_chunk_id` optional field of struct lttcomm_relayd_rotate_streams. | |
2513 | * | |
2514 | * We start by "unpacking" `stream_count` to figure out the padding length | |
2515 | * emited by our peer. | |
2516 | */ | |
11bcbf89 JG |
2517 | { |
2518 | decltype(rotate_streams.stream_count) stream_count; | |
2519 | ||
2520 | memcpy(&stream_count, payload->data, sizeof(stream_count)); | |
2521 | rotate_streams.stream_count = be32toh(stream_count); | |
2522 | } | |
2523 | ||
2524 | rotate_streams.new_chunk_id = LTTNG_OPTIONAL_INIT_UNSET; | |
ce9dbd47 JG |
2525 | |
2526 | /* | |
2527 | * Payload size expected given the possible padding lengths in | |
2528 | * `struct lttcomm_relayd_rotate_streams`. | |
2529 | */ | |
28ab034a JG |
2530 | expected_payload_size_no_padding = |
2531 | (rotate_streams.stream_count * sizeof(*rotate_streams.rotation_positions)) + | |
ce9dbd47 | 2532 | sizeof(lttcomm_relayd_rotate_streams_packed); |
28ab034a JG |
2533 | expected_payload_size_3_bytes_padding = |
2534 | (rotate_streams.stream_count * sizeof(*rotate_streams.rotation_positions)) + | |
ce9dbd47 | 2535 | sizeof(lttcomm_relayd_rotate_streams_3_bytes_padding); |
28ab034a JG |
2536 | expected_payload_size_7_bytes_padding = |
2537 | (rotate_streams.stream_count * sizeof(*rotate_streams.rotation_positions)) + | |
ce9dbd47 JG |
2538 | sizeof(lttcomm_relayd_rotate_streams_7_bytes_padding); |
2539 | ||
2540 | if (payload->size == expected_payload_size_no_padding) { | |
2541 | struct lttcomm_relayd_rotate_streams_packed packed_rotate_streams; | |
2542 | ||
2543 | /* | |
2544 | * This handles cases where someone might build with | |
2545 | * -fpack-struct or any other toolchain that wouldn't produce | |
2546 | * padding to align `value`. | |
2547 | */ | |
2548 | DBG("Received `struct lttcomm_relayd_rotate_streams` with no padding"); | |
2549 | ||
2550 | header_len = sizeof(packed_rotate_streams); | |
2551 | memcpy(&packed_rotate_streams, payload->data, header_len); | |
2552 | ||
2553 | /* Unpack the packed structure to the natively-packed version. */ | |
11bcbf89 JG |
2554 | _rotate_streams->new_chunk_id = (typeof(_rotate_streams->new_chunk_id)){ |
2555 | .is_set = !!packed_rotate_streams.new_chunk_id.is_set, | |
2556 | .value = be64toh(packed_rotate_streams.new_chunk_id.value), | |
ce9dbd47 | 2557 | }; |
11bcbf89 | 2558 | _rotate_streams->stream_count = be32toh(packed_rotate_streams.stream_count); |
ce9dbd47 JG |
2559 | } else if (payload->size == expected_payload_size_3_bytes_padding) { |
2560 | struct lttcomm_relayd_rotate_streams_3_bytes_padding padded_rotate_streams; | |
2561 | ||
2562 | DBG("Received `struct lttcomm_relayd_rotate_streams` with 3 bytes of padding (4-byte aligned peer)"); | |
2563 | ||
2564 | header_len = sizeof(padded_rotate_streams); | |
2565 | memcpy(&padded_rotate_streams, payload->data, header_len); | |
2566 | ||
2567 | /* Unpack the 3-byte padded structure to the natively-packed version. */ | |
11bcbf89 JG |
2568 | _rotate_streams->new_chunk_id = (typeof(_rotate_streams->new_chunk_id)){ |
2569 | .is_set = !!padded_rotate_streams.new_chunk_id.is_set, | |
2570 | .value = be64toh(padded_rotate_streams.new_chunk_id.value), | |
ce9dbd47 | 2571 | }; |
11bcbf89 | 2572 | _rotate_streams->stream_count = be32toh(padded_rotate_streams.stream_count); |
ce9dbd47 JG |
2573 | } else if (payload->size == expected_payload_size_7_bytes_padding) { |
2574 | struct lttcomm_relayd_rotate_streams_7_bytes_padding padded_rotate_streams; | |
2575 | ||
2576 | DBG("Received `struct lttcomm_relayd_rotate_streams` with 7 bytes of padding (8-byte aligned peer)"); | |
2577 | ||
2578 | header_len = sizeof(padded_rotate_streams); | |
2579 | memcpy(&padded_rotate_streams, payload->data, header_len); | |
2580 | ||
2581 | /* Unpack the 7-byte padded structure to the natively-packed version. */ | |
11bcbf89 JG |
2582 | _rotate_streams->new_chunk_id = (typeof(_rotate_streams->new_chunk_id)){ |
2583 | .is_set = !!padded_rotate_streams.new_chunk_id.is_set, | |
2584 | .value = be64toh(padded_rotate_streams.new_chunk_id.value), | |
ce9dbd47 | 2585 | }; |
11bcbf89 | 2586 | _rotate_streams->stream_count = be32toh(padded_rotate_streams.stream_count); |
ce9dbd47 JG |
2587 | |
2588 | header_len = sizeof(padded_rotate_streams); | |
2589 | } else { | |
2590 | ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected %zu, %zu or %zu bytes, got %zu bytes", | |
28ab034a JG |
2591 | expected_payload_size_no_padding, |
2592 | expected_payload_size_3_bytes_padding, | |
2593 | expected_payload_size_7_bytes_padding, | |
2594 | payload->size); | |
ce9dbd47 JG |
2595 | goto error; |
2596 | } | |
2597 | ||
2598 | return header_len; | |
2599 | error: | |
2600 | return -1; | |
2601 | } | |
2602 | ||
d3ecc550 | 2603 | /* |
c35f9726 JG |
2604 | * relay_rotate_session_stream: rotate a stream to a new tracefile for the |
2605 | * session rotation feature (not the tracefile rotation feature). | |
d3ecc550 | 2606 | */ |
28ab034a JG |
2607 | static int relay_rotate_session_streams(const struct lttcomm_relayd_hdr *recv_hdr |
2608 | __attribute__((unused)), | |
2609 | struct relay_connection *conn, | |
2610 | const struct lttng_buffer_view *payload) | |
d3ecc550 | 2611 | { |
30b9d5ab | 2612 | int ret = 0; |
c35f9726 | 2613 | uint32_t i; |
5312a3ed | 2614 | ssize_t send_ret; |
c35f9726 | 2615 | enum lttng_error_code reply_code = LTTNG_ERR_UNK; |
d3ecc550 | 2616 | struct relay_session *session = conn->session; |
c35f9726 JG |
2617 | struct lttcomm_relayd_rotate_streams rotate_streams; |
2618 | struct lttcomm_relayd_generic_reply reply = {}; | |
cd9adb8b JG |
2619 | struct relay_stream *stream = nullptr; |
2620 | struct lttng_trace_chunk *next_trace_chunk = nullptr; | |
c35f9726 | 2621 | struct lttng_buffer_view stream_positions; |
70626904 JG |
2622 | char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)]; |
2623 | const char *chunk_id_str = "none"; | |
ce9dbd47 | 2624 | ssize_t header_len; |
d3ecc550 | 2625 | |
d3ecc550 JD |
2626 | if (!session || !conn->version_check_done) { |
2627 | ERR("Trying to rotate a stream before version check"); | |
2628 | ret = -1; | |
2629 | goto end_no_reply; | |
2630 | } | |
2631 | ||
2632 | if (session->major == 2 && session->minor < 11) { | |
2633 | ERR("Unsupported feature before 2.11"); | |
2634 | ret = -1; | |
2635 | goto end_no_reply; | |
2636 | } | |
2637 | ||
ce9dbd47 JG |
2638 | header_len = relay_unpack_rotate_streams_header(payload, &rotate_streams); |
2639 | if (header_len < 0) { | |
d3ecc550 JD |
2640 | ret = -1; |
2641 | goto end_no_reply; | |
2642 | } | |
2643 | ||
c35f9726 JG |
2644 | if (rotate_streams.new_chunk_id.is_set) { |
2645 | /* | |
2646 | * Retrieve the trace chunk the stream must transition to. As | |
2647 | * per the protocol, this chunk should have been created | |
2648 | * before this command is received. | |
2649 | */ | |
2650 | next_trace_chunk = sessiond_trace_chunk_registry_get_chunk( | |
28ab034a JG |
2651 | sessiond_trace_chunk_registry, |
2652 | session->sessiond_uuid, | |
2653 | conn->session->id_sessiond.is_set ? conn->session->id_sessiond.value : | |
2654 | conn->session->id, | |
2655 | rotate_streams.new_chunk_id.value); | |
c35f9726 | 2656 | if (!next_trace_chunk) { |
c70636a7 | 2657 | char uuid_str[LTTNG_UUID_STR_LEN]; |
c35f9726 JG |
2658 | |
2659 | lttng_uuid_to_str(session->sessiond_uuid, uuid_str); | |
2660 | ERR("Unknown next trace chunk in ROTATE_STREAMS command: sessiond_uuid = {%s}, session_id = %" PRIu64 | |
28ab034a JG |
2661 | ", trace_chunk_id = %" PRIu64, |
2662 | uuid_str, | |
2663 | session->id, | |
2664 | rotate_streams.new_chunk_id.value); | |
c35f9726 JG |
2665 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; |
2666 | ret = -1; | |
2667 | goto end; | |
2668 | } | |
70626904 | 2669 | |
28ab034a JG |
2670 | ret = snprintf(chunk_id_buf, |
2671 | sizeof(chunk_id_buf), | |
2672 | "%" PRIu64, | |
2673 | rotate_streams.new_chunk_id.value); | |
70626904 JG |
2674 | if (ret < 0 || ret >= sizeof(chunk_id_buf)) { |
2675 | chunk_id_str = "formatting error"; | |
2676 | } else { | |
2677 | chunk_id_str = chunk_id_buf; | |
2678 | } | |
d3ecc550 JD |
2679 | } |
2680 | ||
70626904 | 2681 | DBG("Rotate %" PRIu32 " streams of session \"%s\" to chunk \"%s\"", |
28ab034a JG |
2682 | rotate_streams.stream_count, |
2683 | session->session_name, | |
2684 | chunk_id_str); | |
70626904 | 2685 | |
28ab034a | 2686 | stream_positions = lttng_buffer_view_from_view(payload, header_len, -1); |
c35f9726 | 2687 | if (!stream_positions.data || |
28ab034a JG |
2688 | stream_positions.size < (rotate_streams.stream_count * |
2689 | sizeof(struct lttcomm_relayd_stream_rotation_position))) { | |
c35f9726 | 2690 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; |
d3ecc550 | 2691 | ret = -1; |
5312a3ed | 2692 | goto end; |
d3ecc550 JD |
2693 | } |
2694 | ||
c35f9726 JG |
2695 | for (i = 0; i < rotate_streams.stream_count; i++) { |
2696 | struct lttcomm_relayd_stream_rotation_position *position_comm = | |
28ab034a | 2697 | &((typeof(position_comm)) stream_positions.data)[i]; |
c35f9726 JG |
2698 | const struct lttcomm_relayd_stream_rotation_position pos = { |
2699 | .stream_id = be64toh(position_comm->stream_id), | |
28ab034a | 2700 | .rotate_at_seq_num = be64toh(position_comm->rotate_at_seq_num), |
c35f9726 | 2701 | }; |
5312a3ed | 2702 | |
c35f9726 JG |
2703 | stream = stream_get_by_id(pos.stream_id); |
2704 | if (!stream) { | |
2705 | reply_code = LTTNG_ERR_INVALID; | |
2706 | ret = -1; | |
2707 | goto end; | |
c6db3843 JG |
2708 | } |
2709 | ||
c35f9726 | 2710 | pthread_mutex_lock(&stream->lock); |
28ab034a | 2711 | ret = stream_set_pending_rotation(stream, next_trace_chunk, pos.rotate_at_seq_num); |
c35f9726 JG |
2712 | pthread_mutex_unlock(&stream->lock); |
2713 | if (ret) { | |
2714 | reply_code = LTTNG_ERR_FILE_CREATION_ERROR; | |
2715 | goto end; | |
c6db3843 | 2716 | } |
c35f9726 JG |
2717 | |
2718 | stream_put(stream); | |
cd9adb8b | 2719 | stream = nullptr; |
d3ecc550 JD |
2720 | } |
2721 | ||
c35f9726 | 2722 | reply_code = LTTNG_OK; |
eaeb64a9 | 2723 | ret = 0; |
d3ecc550 | 2724 | end: |
c35f9726 JG |
2725 | if (stream) { |
2726 | stream_put(stream); | |
d3ecc550 | 2727 | } |
c35f9726 JG |
2728 | |
2729 | reply.ret_code = htobe32((uint32_t) reply_code); | |
28ab034a JG |
2730 | send_ret = conn->sock->ops->sendmsg( |
2731 | conn->sock, &reply, sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed | 2732 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 2733 | ERR("Failed to send \"rotate session stream\" command reply (ret = %zd)", send_ret); |
5312a3ed | 2734 | ret = -1; |
d3ecc550 | 2735 | } |
d3ecc550 | 2736 | end_no_reply: |
c35f9726 | 2737 | lttng_trace_chunk_put(next_trace_chunk); |
d3ecc550 JD |
2738 | return ret; |
2739 | } | |
2740 | ||
e5add6d0 JG |
2741 | /* |
2742 | * relay_create_trace_chunk: create a new trace chunk | |
2743 | */ | |
28ab034a JG |
2744 | static int relay_create_trace_chunk(const struct lttcomm_relayd_hdr *recv_hdr |
2745 | __attribute__((unused)), | |
2746 | struct relay_connection *conn, | |
2747 | const struct lttng_buffer_view *payload) | |
e5add6d0 JG |
2748 | { |
2749 | int ret = 0; | |
2750 | ssize_t send_ret; | |
2751 | struct relay_session *session = conn->session; | |
2752 | struct lttcomm_relayd_create_trace_chunk *msg; | |
2753 | struct lttcomm_relayd_generic_reply reply = {}; | |
2754 | struct lttng_buffer_view header_view; | |
cd9adb8b | 2755 | struct lttng_trace_chunk *chunk = nullptr, *published_chunk = nullptr; |
e5add6d0 JG |
2756 | enum lttng_error_code reply_code = LTTNG_OK; |
2757 | enum lttng_trace_chunk_status chunk_status; | |
a7ceb342 | 2758 | const char *new_path; |
e5add6d0 JG |
2759 | |
2760 | if (!session || !conn->version_check_done) { | |
2761 | ERR("Trying to create a trace chunk before version check"); | |
2762 | ret = -1; | |
2763 | goto end_no_reply; | |
2764 | } | |
2765 | ||
2766 | if (session->major == 2 && session->minor < 11) { | |
2767 | ERR("Chunk creation command is unsupported before 2.11"); | |
2768 | ret = -1; | |
2769 | goto end_no_reply; | |
2770 | } | |
2771 | ||
2772 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 2773 | if (!lttng_buffer_view_is_valid(&header_view)) { |
e5add6d0 JG |
2774 | ERR("Failed to receive payload of chunk creation command"); |
2775 | ret = -1; | |
2776 | goto end_no_reply; | |
2777 | } | |
2778 | ||
2779 | /* Convert to host endianness. */ | |
2780 | msg = (typeof(msg)) header_view.data; | |
2781 | msg->chunk_id = be64toh(msg->chunk_id); | |
2782 | msg->creation_timestamp = be64toh(msg->creation_timestamp); | |
2783 | msg->override_name_length = be32toh(msg->override_name_length); | |
2784 | ||
8cd15f6a MD |
2785 | pthread_mutex_lock(&conn->session->lock); |
2786 | session->ongoing_rotation = true; | |
a7ceb342 | 2787 | if (session->current_trace_chunk && |
28ab034a | 2788 | !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) { |
a7ceb342 | 2789 | chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk, |
28ab034a | 2790 | DEFAULT_CHUNK_TMP_OLD_DIRECTORY); |
a7ceb342 MD |
2791 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
2792 | ERR("Failed to rename old chunk"); | |
2793 | ret = -1; | |
2794 | reply_code = LTTNG_ERR_UNK; | |
2795 | goto end; | |
2796 | } | |
2797 | } | |
a7ceb342 MD |
2798 | if (!session->current_trace_chunk) { |
2799 | if (!session->has_rotated) { | |
2800 | new_path = ""; | |
2801 | } else { | |
cd9adb8b | 2802 | new_path = nullptr; |
a7ceb342 MD |
2803 | } |
2804 | } else { | |
2805 | new_path = DEFAULT_CHUNK_TMP_NEW_DIRECTORY; | |
2806 | } | |
28ab034a | 2807 | chunk = lttng_trace_chunk_create(msg->chunk_id, msg->creation_timestamp, new_path); |
e5add6d0 JG |
2808 | if (!chunk) { |
2809 | ERR("Failed to create trace chunk in trace chunk creation command"); | |
2810 | ret = -1; | |
2811 | reply_code = LTTNG_ERR_NOMEM; | |
2812 | goto end; | |
2813 | } | |
7145f5e9 | 2814 | lttng_trace_chunk_set_fd_tracker(chunk, the_fd_tracker); |
e5add6d0 JG |
2815 | |
2816 | if (msg->override_name_length) { | |
2817 | const char *name; | |
28ab034a JG |
2818 | const struct lttng_buffer_view chunk_name_view = lttng_buffer_view_from_view( |
2819 | payload, sizeof(*msg), msg->override_name_length); | |
3e6e0df2 JG |
2820 | |
2821 | if (!lttng_buffer_view_is_valid(&chunk_name_view)) { | |
2822 | ERR("Invalid payload of chunk creation command (protocol error): buffer too short for expected name length"); | |
2823 | ret = -1; | |
2824 | reply_code = LTTNG_ERR_INVALID; | |
2825 | goto end; | |
2826 | } | |
e5add6d0 | 2827 | |
e5add6d0 | 2828 | name = chunk_name_view.data; |
3e6e0df2 JG |
2829 | if (name[msg->override_name_length - 1]) { |
2830 | ERR("Invalid payload of chunk creation command (protocol error): name is not null-terminated"); | |
e5add6d0 JG |
2831 | ret = -1; |
2832 | reply_code = LTTNG_ERR_INVALID; | |
2833 | goto end; | |
2834 | } | |
2835 | ||
28ab034a | 2836 | chunk_status = lttng_trace_chunk_override_name(chunk, chunk_name_view.data); |
e5add6d0 JG |
2837 | switch (chunk_status) { |
2838 | case LTTNG_TRACE_CHUNK_STATUS_OK: | |
2839 | break; | |
2840 | case LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT: | |
2841 | ERR("Failed to set the name of new trace chunk in trace chunk creation command (invalid name)"); | |
2842 | reply_code = LTTNG_ERR_INVALID; | |
2843 | ret = -1; | |
2844 | goto end; | |
2845 | default: | |
2846 | ERR("Failed to set the name of new trace chunk in trace chunk creation command (unknown error)"); | |
2847 | reply_code = LTTNG_ERR_UNK; | |
2848 | ret = -1; | |
2849 | goto end; | |
2850 | } | |
2851 | } | |
2852 | ||
e5add6d0 JG |
2853 | chunk_status = lttng_trace_chunk_set_credentials_current_user(chunk); |
2854 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2855 | reply_code = LTTNG_ERR_UNK; | |
2856 | ret = -1; | |
2857 | goto end; | |
2858 | } | |
2859 | ||
a0377dfe | 2860 | LTTNG_ASSERT(conn->session->output_directory); |
28ab034a | 2861 | chunk_status = lttng_trace_chunk_set_as_owner(chunk, conn->session->output_directory); |
e5add6d0 JG |
2862 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
2863 | reply_code = LTTNG_ERR_UNK; | |
2864 | ret = -1; | |
2865 | goto end; | |
2866 | } | |
2867 | ||
2868 | published_chunk = sessiond_trace_chunk_registry_publish_chunk( | |
28ab034a JG |
2869 | sessiond_trace_chunk_registry, |
2870 | conn->session->sessiond_uuid, | |
2871 | conn->session->id_sessiond.is_set ? conn->session->id_sessiond.value : | |
2872 | conn->session->id, | |
2873 | chunk); | |
e5add6d0 | 2874 | if (!published_chunk) { |
c70636a7 | 2875 | char uuid_str[LTTNG_UUID_STR_LEN]; |
e5add6d0 JG |
2876 | |
2877 | lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str); | |
28ab034a JG |
2878 | ERR("Failed to publish chunk: sessiond_uuid = %s, session_id = %" PRIu64 |
2879 | ", chunk_id = %" PRIu64, | |
2880 | uuid_str, | |
2881 | conn->session->id, | |
2882 | msg->chunk_id); | |
e5add6d0 JG |
2883 | ret = -1; |
2884 | reply_code = LTTNG_ERR_NOMEM; | |
2885 | goto end; | |
2886 | } | |
2887 | ||
62bad3bf JG |
2888 | if (conn->session->pending_closure_trace_chunk) { |
2889 | /* | |
2890 | * Invalid; this means a second create_trace_chunk command was | |
2891 | * received before a close_trace_chunk. | |
2892 | */ | |
2893 | ERR("Invalid trace chunk close command received; a trace chunk is already waiting for a trace chunk close command"); | |
2894 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2895 | ret = -1; | |
8cd15f6a | 2896 | goto end; |
62bad3bf | 2897 | } |
28ab034a | 2898 | conn->session->pending_closure_trace_chunk = conn->session->current_trace_chunk; |
e5add6d0 | 2899 | conn->session->current_trace_chunk = published_chunk; |
cd9adb8b | 2900 | published_chunk = nullptr; |
a7ceb342 MD |
2901 | if (!conn->session->pending_closure_trace_chunk) { |
2902 | session->ongoing_rotation = false; | |
2903 | } | |
e5add6d0 | 2904 | end: |
8cd15f6a | 2905 | pthread_mutex_unlock(&conn->session->lock); |
e5add6d0 | 2906 | reply.ret_code = htobe32((uint32_t) reply_code); |
28ab034a JG |
2907 | send_ret = conn->sock->ops->sendmsg( |
2908 | conn->sock, &reply, sizeof(struct lttcomm_relayd_generic_reply), 0); | |
e5add6d0 | 2909 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 2910 | ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)", send_ret); |
e5add6d0 JG |
2911 | ret = -1; |
2912 | } | |
2913 | end_no_reply: | |
2914 | lttng_trace_chunk_put(chunk); | |
2915 | lttng_trace_chunk_put(published_chunk); | |
e5add6d0 JG |
2916 | return ret; |
2917 | } | |
2918 | ||
bbc4768c JG |
2919 | /* |
2920 | * relay_close_trace_chunk: close a trace chunk | |
2921 | */ | |
28ab034a JG |
2922 | static int relay_close_trace_chunk(const struct lttcomm_relayd_hdr *recv_hdr |
2923 | __attribute__((unused)), | |
2924 | struct relay_connection *conn, | |
2925 | const struct lttng_buffer_view *payload) | |
bbc4768c | 2926 | { |
9898f786 | 2927 | int ret = 0, buf_ret; |
bbc4768c JG |
2928 | ssize_t send_ret; |
2929 | struct relay_session *session = conn->session; | |
2930 | struct lttcomm_relayd_close_trace_chunk *msg; | |
ecd1a12f | 2931 | struct lttcomm_relayd_close_trace_chunk_reply reply = {}; |
bbc4768c | 2932 | struct lttng_buffer_view header_view; |
cd9adb8b | 2933 | struct lttng_trace_chunk *chunk = nullptr; |
bbc4768c JG |
2934 | enum lttng_error_code reply_code = LTTNG_OK; |
2935 | enum lttng_trace_chunk_status chunk_status; | |
2936 | uint64_t chunk_id; | |
c35f9726 | 2937 | LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command = {}; |
bbc4768c | 2938 | time_t close_timestamp; |
ecd1a12f MD |
2939 | char closed_trace_chunk_path[LTTNG_PATH_MAX]; |
2940 | size_t path_length = 0; | |
cd9adb8b | 2941 | const char *chunk_name = nullptr; |
ecd1a12f | 2942 | struct lttng_dynamic_buffer reply_payload; |
a7ceb342 | 2943 | const char *new_path; |
ecd1a12f MD |
2944 | |
2945 | lttng_dynamic_buffer_init(&reply_payload); | |
bbc4768c JG |
2946 | |
2947 | if (!session || !conn->version_check_done) { | |
2948 | ERR("Trying to close a trace chunk before version check"); | |
2949 | ret = -1; | |
2950 | goto end_no_reply; | |
2951 | } | |
2952 | ||
2953 | if (session->major == 2 && session->minor < 11) { | |
2954 | ERR("Chunk close command is unsupported before 2.11"); | |
2955 | ret = -1; | |
2956 | goto end_no_reply; | |
2957 | } | |
2958 | ||
2959 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 2960 | if (!lttng_buffer_view_is_valid(&header_view)) { |
bbc4768c JG |
2961 | ERR("Failed to receive payload of chunk close command"); |
2962 | ret = -1; | |
2963 | goto end_no_reply; | |
2964 | } | |
2965 | ||
2966 | /* Convert to host endianness. */ | |
2967 | msg = (typeof(msg)) header_view.data; | |
2968 | chunk_id = be64toh(msg->chunk_id); | |
2969 | close_timestamp = (time_t) be64toh(msg->close_timestamp); | |
ac497a37 SM |
2970 | close_command.value = (lttng_trace_chunk_command_type) be32toh(msg->close_command.value); |
2971 | close_command.is_set = msg->close_command.is_set; | |
bbc4768c | 2972 | |
28ab034a JG |
2973 | chunk = sessiond_trace_chunk_registry_get_chunk(sessiond_trace_chunk_registry, |
2974 | conn->session->sessiond_uuid, | |
2975 | conn->session->id_sessiond.is_set ? | |
2976 | conn->session->id_sessiond.value : | |
2977 | conn->session->id, | |
2978 | chunk_id); | |
bbc4768c | 2979 | if (!chunk) { |
c70636a7 | 2980 | char uuid_str[LTTNG_UUID_STR_LEN]; |
bbc4768c JG |
2981 | |
2982 | lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str); | |
28ab034a JG |
2983 | ERR("Failed to find chunk to close: sessiond_uuid = %s, session_id = %" PRIu64 |
2984 | ", chunk_id = %" PRIu64, | |
2985 | uuid_str, | |
2986 | conn->session->id, | |
2987 | msg->chunk_id); | |
bbc4768c JG |
2988 | ret = -1; |
2989 | reply_code = LTTNG_ERR_NOMEM; | |
2990 | goto end; | |
2991 | } | |
2992 | ||
62bad3bf | 2993 | pthread_mutex_lock(&session->lock); |
28ab034a | 2994 | if (close_command.is_set && close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE) { |
f77a6ec2 MD |
2995 | /* |
2996 | * Clear command. It is a protocol error to ask for a | |
2997 | * clear on a relay which does not allow it. Querying | |
2998 | * the configuration allows figuring out whether | |
2999 | * clearing is allowed before doing the clear. | |
3000 | */ | |
3001 | if (!opt_allow_clear) { | |
3002 | ret = -1; | |
3003 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3004 | goto end_unlock_session; | |
3005 | } | |
3006 | } | |
28ab034a | 3007 | if (session->pending_closure_trace_chunk && session->pending_closure_trace_chunk != chunk) { |
62bad3bf | 3008 | ERR("Trace chunk close command for session \"%s\" does not target the trace chunk pending closure", |
28ab034a | 3009 | session->session_name); |
62bad3bf JG |
3010 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; |
3011 | ret = -1; | |
3012 | goto end_unlock_session; | |
3013 | } | |
3014 | ||
a7ceb342 | 3015 | if (session->current_trace_chunk && session->current_trace_chunk != chunk && |
28ab034a | 3016 | !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) { |
a7ceb342 | 3017 | if (close_command.is_set && |
28ab034a JG |
3018 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE && |
3019 | !session->has_rotated) { | |
a7ceb342 MD |
3020 | /* New chunk stays in session output directory. */ |
3021 | new_path = ""; | |
3022 | } else { | |
3023 | /* Use chunk name for new chunk. */ | |
cd9adb8b | 3024 | new_path = nullptr; |
a7ceb342 MD |
3025 | } |
3026 | /* Rename new chunk path. */ | |
28ab034a JG |
3027 | chunk_status = |
3028 | lttng_trace_chunk_rename_path(session->current_trace_chunk, new_path); | |
a7ceb342 MD |
3029 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
3030 | ret = -1; | |
88188199 | 3031 | goto end_unlock_session; |
a7ceb342 MD |
3032 | } |
3033 | session->ongoing_rotation = false; | |
3034 | } | |
3035 | if ((!close_command.is_set || | |
28ab034a JG |
3036 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION) && |
3037 | !lttng_trace_chunk_get_name_overridden(chunk)) { | |
a7ceb342 MD |
3038 | const char *old_path; |
3039 | ||
3040 | if (!session->has_rotated) { | |
3041 | old_path = ""; | |
3042 | } else { | |
cd9adb8b | 3043 | old_path = nullptr; |
a7ceb342 MD |
3044 | } |
3045 | /* We need to move back the .tmp_old_chunk to its rightful place. */ | |
3046 | chunk_status = lttng_trace_chunk_rename_path(chunk, old_path); | |
3047 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3048 | ret = -1; | |
88188199 | 3049 | goto end_unlock_session; |
a7ceb342 MD |
3050 | } |
3051 | } | |
28ab034a | 3052 | chunk_status = lttng_trace_chunk_set_close_timestamp(chunk, close_timestamp); |
bbc4768c JG |
3053 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
3054 | ERR("Failed to set trace chunk close timestamp"); | |
3055 | ret = -1; | |
3056 | reply_code = LTTNG_ERR_UNK; | |
62bad3bf | 3057 | goto end_unlock_session; |
bbc4768c JG |
3058 | } |
3059 | ||
3060 | if (close_command.is_set) { | |
28ab034a | 3061 | chunk_status = lttng_trace_chunk_set_close_command(chunk, close_command.value); |
bbc4768c JG |
3062 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
3063 | ret = -1; | |
3064 | reply_code = LTTNG_ERR_INVALID; | |
62bad3bf | 3065 | goto end_unlock_session; |
bbc4768c JG |
3066 | } |
3067 | } | |
cd9adb8b | 3068 | chunk_status = lttng_trace_chunk_get_name(chunk, &chunk_name, nullptr); |
ecd1a12f MD |
3069 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
3070 | ERR("Failed to get chunk name"); | |
3071 | ret = -1; | |
3072 | reply_code = LTTNG_ERR_UNK; | |
3073 | goto end_unlock_session; | |
3074 | } | |
3075 | if (!session->has_rotated && !session->snapshot) { | |
3076 | ret = lttng_strncpy(closed_trace_chunk_path, | |
28ab034a JG |
3077 | session->output_path, |
3078 | sizeof(closed_trace_chunk_path)); | |
ecd1a12f MD |
3079 | if (ret) { |
3080 | ERR("Failed to send trace chunk path: path length of %zu bytes exceeds the maximal allowed length of %zu bytes", | |
28ab034a JG |
3081 | strlen(session->output_path), |
3082 | sizeof(closed_trace_chunk_path)); | |
ecd1a12f MD |
3083 | reply_code = LTTNG_ERR_NOMEM; |
3084 | ret = -1; | |
3085 | goto end_unlock_session; | |
3086 | } | |
3087 | } else { | |
3088 | if (session->snapshot) { | |
3089 | ret = snprintf(closed_trace_chunk_path, | |
28ab034a JG |
3090 | sizeof(closed_trace_chunk_path), |
3091 | "%s/%s", | |
3092 | session->output_path, | |
3093 | chunk_name); | |
ecd1a12f MD |
3094 | } else { |
3095 | ret = snprintf(closed_trace_chunk_path, | |
28ab034a JG |
3096 | sizeof(closed_trace_chunk_path), |
3097 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY "/%s", | |
3098 | session->output_path, | |
3099 | chunk_name); | |
ecd1a12f MD |
3100 | } |
3101 | if (ret < 0 || ret == sizeof(closed_trace_chunk_path)) { | |
3102 | ERR("Failed to format closed trace chunk resulting path"); | |
3103 | reply_code = ret < 0 ? LTTNG_ERR_UNK : LTTNG_ERR_NOMEM; | |
3104 | ret = -1; | |
3105 | goto end_unlock_session; | |
3106 | } | |
3107 | } | |
489ea154 | 3108 | if (close_command.is_set && |
28ab034a | 3109 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED) { |
489ea154 MD |
3110 | session->has_rotated = true; |
3111 | } | |
ecd1a12f MD |
3112 | DBG("Reply chunk path on close: %s", closed_trace_chunk_path); |
3113 | path_length = strlen(closed_trace_chunk_path) + 1; | |
3114 | if (path_length > UINT32_MAX) { | |
3115 | ERR("Closed trace chunk path exceeds the maximal length allowed by the protocol"); | |
3116 | ret = -1; | |
3117 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3118 | goto end_unlock_session; | |
3119 | } | |
bbc4768c | 3120 | |
c35f9726 JG |
3121 | if (session->current_trace_chunk == chunk) { |
3122 | /* | |
3123 | * After a trace chunk close command, no new streams | |
3124 | * referencing the chunk may be created. Hence, on the | |
3125 | * event that no new trace chunk have been created for | |
3126 | * the session, the reference to the current trace chunk | |
3127 | * is released in order to allow it to be reclaimed when | |
3128 | * the last stream releases its reference to it. | |
3129 | */ | |
3130 | lttng_trace_chunk_put(session->current_trace_chunk); | |
cd9adb8b | 3131 | session->current_trace_chunk = nullptr; |
c35f9726 | 3132 | } |
62bad3bf | 3133 | lttng_trace_chunk_put(session->pending_closure_trace_chunk); |
cd9adb8b | 3134 | session->pending_closure_trace_chunk = nullptr; |
62bad3bf | 3135 | end_unlock_session: |
c35f9726 JG |
3136 | pthread_mutex_unlock(&session->lock); |
3137 | ||
bbc4768c | 3138 | end: |
ecd1a12f MD |
3139 | reply.generic.ret_code = htobe32((uint32_t) reply_code); |
3140 | reply.path_length = htobe32((uint32_t) path_length); | |
28ab034a | 3141 | buf_ret = lttng_dynamic_buffer_append(&reply_payload, &reply, sizeof(reply)); |
9898f786 | 3142 | if (buf_ret) { |
ecd1a12f MD |
3143 | ERR("Failed to append \"close trace chunk\" command reply header to payload buffer"); |
3144 | goto end_no_reply; | |
3145 | } | |
3146 | ||
3147 | if (reply_code == LTTNG_OK) { | |
28ab034a JG |
3148 | buf_ret = lttng_dynamic_buffer_append( |
3149 | &reply_payload, closed_trace_chunk_path, path_length); | |
9898f786 | 3150 | if (buf_ret) { |
ecd1a12f MD |
3151 | ERR("Failed to append \"close trace chunk\" command reply path to payload buffer"); |
3152 | goto end_no_reply; | |
3153 | } | |
3154 | } | |
3155 | ||
28ab034a | 3156 | send_ret = conn->sock->ops->sendmsg(conn->sock, reply_payload.data, reply_payload.size, 0); |
ecd1a12f MD |
3157 | if (send_ret < reply_payload.size) { |
3158 | ERR("Failed to send \"close trace chunk\" command reply of %zu bytes (ret = %zd)", | |
28ab034a JG |
3159 | reply_payload.size, |
3160 | send_ret); | |
bbc4768c | 3161 | ret = -1; |
ecd1a12f | 3162 | goto end_no_reply; |
bbc4768c JG |
3163 | } |
3164 | end_no_reply: | |
3165 | lttng_trace_chunk_put(chunk); | |
ecd1a12f | 3166 | lttng_dynamic_buffer_reset(&reply_payload); |
bbc4768c JG |
3167 | return ret; |
3168 | } | |
3169 | ||
c35f9726 JG |
3170 | /* |
3171 | * relay_trace_chunk_exists: check if a trace chunk exists | |
3172 | */ | |
28ab034a JG |
3173 | static int relay_trace_chunk_exists(const struct lttcomm_relayd_hdr *recv_hdr |
3174 | __attribute__((unused)), | |
3175 | struct relay_connection *conn, | |
3176 | const struct lttng_buffer_view *payload) | |
c35f9726 JG |
3177 | { |
3178 | int ret = 0; | |
3179 | ssize_t send_ret; | |
3180 | struct relay_session *session = conn->session; | |
3181 | struct lttcomm_relayd_trace_chunk_exists *msg; | |
3182 | struct lttcomm_relayd_trace_chunk_exists_reply reply = {}; | |
3183 | struct lttng_buffer_view header_view; | |
c35f9726 | 3184 | uint64_t chunk_id; |
6b584c2e | 3185 | bool chunk_exists; |
c35f9726 JG |
3186 | |
3187 | if (!session || !conn->version_check_done) { | |
0f1b1d25 | 3188 | ERR("Trying to check for the presence of a trace chunk before version check"); |
c35f9726 JG |
3189 | ret = -1; |
3190 | goto end_no_reply; | |
3191 | } | |
3192 | ||
3193 | if (session->major == 2 && session->minor < 11) { | |
8a82be4c | 3194 | ERR("Chunk exists command is unsupported before 2.11"); |
c35f9726 JG |
3195 | ret = -1; |
3196 | goto end_no_reply; | |
3197 | } | |
3198 | ||
3199 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 3200 | if (!lttng_buffer_view_is_valid(&header_view)) { |
8a82be4c | 3201 | ERR("Failed to receive payload of chunk exists command"); |
c35f9726 JG |
3202 | ret = -1; |
3203 | goto end_no_reply; | |
3204 | } | |
3205 | ||
3206 | /* Convert to host endianness. */ | |
3207 | msg = (typeof(msg)) header_view.data; | |
3208 | chunk_id = be64toh(msg->chunk_id); | |
3209 | ||
28ab034a JG |
3210 | ret = sessiond_trace_chunk_registry_chunk_exists(sessiond_trace_chunk_registry, |
3211 | conn->session->sessiond_uuid, | |
3212 | conn->session->id, | |
3213 | chunk_id, | |
3214 | &chunk_exists); | |
6b584c2e JG |
3215 | /* |
3216 | * If ret is not 0, send the reply and report the error to the caller. | |
3217 | * It is a protocol (or internal) error and the session/connection | |
3218 | * should be torn down. | |
3219 | */ | |
28ab034a JG |
3220 | reply.generic.ret_code = |
3221 | htobe32((uint32_t) (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)); | |
ac497a37 SM |
3222 | reply.trace_chunk_exists = ret == 0 ? chunk_exists : 0; |
3223 | ||
28ab034a | 3224 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
c35f9726 | 3225 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 3226 | ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)", send_ret); |
c35f9726 JG |
3227 | ret = -1; |
3228 | } | |
3229 | end_no_reply: | |
c35f9726 JG |
3230 | return ret; |
3231 | } | |
3232 | ||
8614e600 MD |
3233 | /* |
3234 | * relay_get_configuration: query whether feature is available | |
3235 | */ | |
28ab034a JG |
3236 | static int relay_get_configuration(const struct lttcomm_relayd_hdr *recv_hdr |
3237 | __attribute__((unused)), | |
3238 | struct relay_connection *conn, | |
3239 | const struct lttng_buffer_view *payload) | |
8614e600 MD |
3240 | { |
3241 | int ret = 0; | |
3242 | ssize_t send_ret; | |
3243 | struct lttcomm_relayd_get_configuration *msg; | |
3244 | struct lttcomm_relayd_get_configuration_reply reply = {}; | |
3245 | struct lttng_buffer_view header_view; | |
3246 | uint64_t query_flags = 0; | |
3247 | uint64_t result_flags = 0; | |
3248 | ||
3249 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 3250 | if (!lttng_buffer_view_is_valid(&header_view)) { |
8614e600 MD |
3251 | ERR("Failed to receive payload of chunk close command"); |
3252 | ret = -1; | |
3253 | goto end_no_reply; | |
3254 | } | |
3255 | ||
3256 | /* Convert to host endianness. */ | |
3257 | msg = (typeof(msg)) header_view.data; | |
3258 | query_flags = be64toh(msg->query_flags); | |
3259 | ||
3260 | if (query_flags) { | |
3261 | ret = LTTNG_ERR_INVALID_PROTOCOL; | |
3262 | goto reply; | |
3263 | } | |
3264 | if (opt_allow_clear) { | |
3265 | result_flags |= LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED; | |
3266 | } | |
3267 | ret = 0; | |
3268 | reply: | |
28ab034a JG |
3269 | reply.generic.ret_code = |
3270 | htobe32((uint32_t) (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)); | |
ac497a37 SM |
3271 | reply.relayd_configuration_flags = htobe64(result_flags); |
3272 | ||
28ab034a | 3273 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
8614e600 | 3274 | if (send_ret < (ssize_t) sizeof(reply)) { |
28ab034a | 3275 | ERR("Failed to send \"get configuration\" command reply (ret = %zd)", send_ret); |
8614e600 MD |
3276 | ret = -1; |
3277 | } | |
3278 | end_no_reply: | |
3279 | return ret; | |
3280 | } | |
3281 | ||
5312a3ed | 3282 | static int relay_process_control_command(struct relay_connection *conn, |
28ab034a JG |
3283 | const struct lttcomm_relayd_hdr *header, |
3284 | const struct lttng_buffer_view *payload) | |
b8aa1682 JD |
3285 | { |
3286 | int ret = 0; | |
3287 | ||
00e71031 | 3288 | DBG3("Processing \"%s\" command for socket %i", |
28ab034a JG |
3289 | lttcomm_relayd_command_str((lttcomm_relayd_command) header->cmd), |
3290 | conn->sock->fd); | |
5312a3ed | 3291 | switch (header->cmd) { |
b8aa1682 | 3292 | case RELAYD_CREATE_SESSION: |
5312a3ed | 3293 | ret = relay_create_session(header, conn, payload); |
b8aa1682 | 3294 | break; |
b8aa1682 | 3295 | case RELAYD_ADD_STREAM: |
5312a3ed | 3296 | ret = relay_add_stream(header, conn, payload); |
b8aa1682 JD |
3297 | break; |
3298 | case RELAYD_START_DATA: | |
5312a3ed | 3299 | ret = relay_start(header, conn, payload); |
b8aa1682 JD |
3300 | break; |
3301 | case RELAYD_SEND_METADATA: | |
5312a3ed | 3302 | ret = relay_recv_metadata(header, conn, payload); |
b8aa1682 JD |
3303 | break; |
3304 | case RELAYD_VERSION: | |
5312a3ed | 3305 | ret = relay_send_version(header, conn, payload); |
b8aa1682 | 3306 | break; |
173af62f | 3307 | case RELAYD_CLOSE_STREAM: |
5312a3ed | 3308 | ret = relay_close_stream(header, conn, payload); |
173af62f | 3309 | break; |
6d805429 | 3310 | case RELAYD_DATA_PENDING: |
5312a3ed | 3311 | ret = relay_data_pending(header, conn, payload); |
c8f59ee5 DG |
3312 | break; |
3313 | case RELAYD_QUIESCENT_CONTROL: | |
5312a3ed | 3314 | ret = relay_quiescent_control(header, conn, payload); |
c8f59ee5 | 3315 | break; |
f7079f67 | 3316 | case RELAYD_BEGIN_DATA_PENDING: |
5312a3ed | 3317 | ret = relay_begin_data_pending(header, conn, payload); |
f7079f67 DG |
3318 | break; |
3319 | case RELAYD_END_DATA_PENDING: | |
5312a3ed | 3320 | ret = relay_end_data_pending(header, conn, payload); |
f7079f67 | 3321 | break; |
1c20f0e2 | 3322 | case RELAYD_SEND_INDEX: |
5312a3ed | 3323 | ret = relay_recv_index(header, conn, payload); |
1c20f0e2 | 3324 | break; |
a4baae1b | 3325 | case RELAYD_STREAMS_SENT: |
5312a3ed | 3326 | ret = relay_streams_sent(header, conn, payload); |
a4baae1b | 3327 | break; |
93ec662e | 3328 | case RELAYD_RESET_METADATA: |
5312a3ed | 3329 | ret = relay_reset_metadata(header, conn, payload); |
93ec662e | 3330 | break; |
c35f9726 | 3331 | case RELAYD_ROTATE_STREAMS: |
c35f9726 | 3332 | ret = relay_rotate_session_streams(header, conn, payload); |
d3ecc550 | 3333 | break; |
e5add6d0 | 3334 | case RELAYD_CREATE_TRACE_CHUNK: |
e5add6d0 JG |
3335 | ret = relay_create_trace_chunk(header, conn, payload); |
3336 | break; | |
bbc4768c | 3337 | case RELAYD_CLOSE_TRACE_CHUNK: |
bbc4768c JG |
3338 | ret = relay_close_trace_chunk(header, conn, payload); |
3339 | break; | |
c35f9726 | 3340 | case RELAYD_TRACE_CHUNK_EXISTS: |
c35f9726 JG |
3341 | ret = relay_trace_chunk_exists(header, conn, payload); |
3342 | break; | |
8614e600 | 3343 | case RELAYD_GET_CONFIGURATION: |
8614e600 MD |
3344 | ret = relay_get_configuration(header, conn, payload); |
3345 | break; | |
b8aa1682 JD |
3346 | case RELAYD_UPDATE_SYNC_INFO: |
3347 | default: | |
5312a3ed | 3348 | ERR("Received unknown command (%u)", header->cmd); |
58eb9381 | 3349 | relay_unknown_command(conn); |
b8aa1682 JD |
3350 | ret = -1; |
3351 | goto end; | |
3352 | } | |
3353 | ||
3354 | end: | |
3355 | return ret; | |
3356 | } | |
3357 | ||
28ab034a JG |
3358 | static enum relay_connection_status |
3359 | relay_process_control_receive_payload(struct relay_connection *conn) | |
5312a3ed JG |
3360 | { |
3361 | int ret = 0; | |
5569b118 | 3362 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
28ab034a | 3363 | struct lttng_dynamic_buffer *reception_buffer = &conn->protocol.ctrl.reception_buffer; |
5312a3ed | 3364 | struct ctrl_connection_state_receive_payload *state = |
28ab034a | 3365 | &conn->protocol.ctrl.state.receive_payload; |
5312a3ed JG |
3366 | struct lttng_buffer_view payload_view; |
3367 | ||
3368 | if (state->left_to_receive == 0) { | |
3369 | /* Short-circuit for payload-less commands. */ | |
3370 | goto reception_complete; | |
3371 | } | |
3372 | ||
3373 | ret = conn->sock->ops->recvmsg(conn->sock, | |
28ab034a JG |
3374 | reception_buffer->data + state->received, |
3375 | state->left_to_receive, | |
3376 | MSG_DONTWAIT); | |
5312a3ed | 3377 | if (ret < 0) { |
942003e5 MJ |
3378 | DIAGNOSTIC_PUSH |
3379 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
5569b118 | 3380 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
28ab034a JG |
3381 | DIAGNOSTIC_POP |
3382 | PERROR("Unable to receive command payload on sock %d", conn->sock->fd); | |
5569b118 JG |
3383 | status = RELAY_CONNECTION_STATUS_ERROR; |
3384 | } | |
5312a3ed JG |
3385 | goto end; |
3386 | } else if (ret == 0) { | |
3387 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3388 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3389 | goto end; |
3390 | } | |
3391 | ||
a0377dfe FD |
3392 | LTTNG_ASSERT(ret > 0); |
3393 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3394 | |
3395 | state->left_to_receive -= ret; | |
3396 | state->received += ret; | |
3397 | ||
3398 | if (state->left_to_receive > 0) { | |
3399 | /* | |
3400 | * Can't transition to the protocol's next state, wait to | |
3401 | * receive the rest of the header. | |
3402 | */ | |
28ab034a JG |
3403 | DBG3("Partial reception of control connection protocol payload (received %" PRIu64 |
3404 | " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3405 | state->received, | |
3406 | state->left_to_receive, | |
3407 | conn->sock->fd); | |
5312a3ed JG |
3408 | goto end; |
3409 | } | |
3410 | ||
3411 | reception_complete: | |
3412 | DBG("Done receiving control command payload: fd = %i, payload size = %" PRIu64 " bytes", | |
28ab034a JG |
3413 | conn->sock->fd, |
3414 | state->received); | |
5312a3ed JG |
3415 | /* |
3416 | * The payload required to process the command has been received. | |
3417 | * A view to the reception buffer is forwarded to the various | |
3418 | * commands and the state of the control is reset on success. | |
3419 | * | |
3420 | * Commands are responsible for sending their reply to the peer. | |
3421 | */ | |
28ab034a JG |
3422 | payload_view = lttng_buffer_view_from_dynamic_buffer(reception_buffer, 0, -1); |
3423 | ret = relay_process_control_command(conn, &state->header, &payload_view); | |
5312a3ed | 3424 | if (ret < 0) { |
5569b118 | 3425 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3426 | goto end; |
3427 | } | |
3428 | ||
3429 | ret = connection_reset_protocol_state(conn); | |
5569b118 JG |
3430 | if (ret) { |
3431 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3432 | } | |
5312a3ed | 3433 | end: |
5569b118 | 3434 | return status; |
5312a3ed JG |
3435 | } |
3436 | ||
28ab034a JG |
3437 | static enum relay_connection_status |
3438 | relay_process_control_receive_header(struct relay_connection *conn) | |
5312a3ed JG |
3439 | { |
3440 | int ret = 0; | |
5569b118 | 3441 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed | 3442 | struct lttcomm_relayd_hdr header; |
28ab034a | 3443 | struct lttng_dynamic_buffer *reception_buffer = &conn->protocol.ctrl.reception_buffer; |
5312a3ed | 3444 | struct ctrl_connection_state_receive_header *state = |
28ab034a | 3445 | &conn->protocol.ctrl.state.receive_header; |
5312a3ed | 3446 | |
a0377dfe | 3447 | LTTNG_ASSERT(state->left_to_receive != 0); |
5312a3ed JG |
3448 | |
3449 | ret = conn->sock->ops->recvmsg(conn->sock, | |
28ab034a JG |
3450 | reception_buffer->data + state->received, |
3451 | state->left_to_receive, | |
3452 | MSG_DONTWAIT); | |
5312a3ed | 3453 | if (ret < 0) { |
942003e5 MJ |
3454 | DIAGNOSTIC_PUSH |
3455 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
5569b118 | 3456 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
28ab034a | 3457 | DIAGNOSTIC_POP |
5569b118 | 3458 | PERROR("Unable to receive control command header on sock %d", |
28ab034a | 3459 | conn->sock->fd); |
5569b118 JG |
3460 | status = RELAY_CONNECTION_STATUS_ERROR; |
3461 | } | |
5312a3ed JG |
3462 | goto end; |
3463 | } else if (ret == 0) { | |
3464 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3465 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3466 | goto end; |
3467 | } | |
3468 | ||
a0377dfe FD |
3469 | LTTNG_ASSERT(ret > 0); |
3470 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3471 | |
3472 | state->left_to_receive -= ret; | |
3473 | state->received += ret; | |
3474 | ||
3475 | if (state->left_to_receive > 0) { | |
3476 | /* | |
3477 | * Can't transition to the protocol's next state, wait to | |
3478 | * receive the rest of the header. | |
3479 | */ | |
28ab034a JG |
3480 | DBG3("Partial reception of control connection protocol header (received %" PRIu64 |
3481 | " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3482 | state->received, | |
3483 | state->left_to_receive, | |
3484 | conn->sock->fd); | |
5312a3ed JG |
3485 | goto end; |
3486 | } | |
3487 | ||
3488 | /* Transition to next state: receiving the command's payload. */ | |
28ab034a | 3489 | conn->protocol.ctrl.state_id = CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD; |
5312a3ed JG |
3490 | memcpy(&header, reception_buffer->data, sizeof(header)); |
3491 | header.circuit_id = be64toh(header.circuit_id); | |
3492 | header.data_size = be64toh(header.data_size); | |
3493 | header.cmd = be32toh(header.cmd); | |
3494 | header.cmd_version = be32toh(header.cmd_version); | |
28ab034a | 3495 | memcpy(&conn->protocol.ctrl.state.receive_payload.header, &header, sizeof(header)); |
5312a3ed | 3496 | |
28ab034a JG |
3497 | DBG("Done receiving control command header: fd = %i, cmd = %s, cmd_version = %" PRIu32 |
3498 | ", payload size = %" PRIu64 " bytes", | |
3499 | conn->sock->fd, | |
3500 | lttcomm_relayd_command_str((enum lttcomm_relayd_command) header.cmd), | |
3501 | header.cmd_version, | |
3502 | header.data_size); | |
5312a3ed | 3503 | |
715e6fb1 | 3504 | if (header.data_size > DEFAULT_NETWORK_RELAYD_CTRL_MAX_PAYLOAD_SIZE) { |
28ab034a JG |
3505 | ERR("Command header indicates a payload (%" PRIu64 |
3506 | " bytes) that exceeds the maximal payload size allowed on a control connection.", | |
3507 | header.data_size); | |
5569b118 | 3508 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3509 | goto end; |
3510 | } | |
3511 | ||
28ab034a | 3512 | conn->protocol.ctrl.state.receive_payload.left_to_receive = header.data_size; |
5312a3ed | 3513 | conn->protocol.ctrl.state.receive_payload.received = 0; |
28ab034a | 3514 | ret = lttng_dynamic_buffer_set_size(reception_buffer, header.data_size); |
5312a3ed | 3515 | if (ret) { |
5569b118 | 3516 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3517 | goto end; |
3518 | } | |
3519 | ||
3520 | if (header.data_size == 0) { | |
3521 | /* | |
3522 | * Manually invoke the next state as the poll loop | |
3523 | * will not wake-up to allow us to proceed further. | |
3524 | */ | |
5569b118 | 3525 | status = relay_process_control_receive_payload(conn); |
5312a3ed JG |
3526 | } |
3527 | end: | |
5569b118 | 3528 | return status; |
5312a3ed JG |
3529 | } |
3530 | ||
3531 | /* | |
3532 | * Process the commands received on the control socket | |
3533 | */ | |
28ab034a | 3534 | static enum relay_connection_status relay_process_control(struct relay_connection *conn) |
5312a3ed | 3535 | { |
5569b118 | 3536 | enum relay_connection_status status; |
5312a3ed JG |
3537 | |
3538 | switch (conn->protocol.ctrl.state_id) { | |
3539 | case CTRL_CONNECTION_STATE_RECEIVE_HEADER: | |
5569b118 | 3540 | status = relay_process_control_receive_header(conn); |
5312a3ed JG |
3541 | break; |
3542 | case CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
5569b118 | 3543 | status = relay_process_control_receive_payload(conn); |
5312a3ed JG |
3544 | break; |
3545 | default: | |
3546 | ERR("Unknown control connection protocol state encountered."); | |
3547 | abort(); | |
3548 | } | |
3549 | ||
5569b118 | 3550 | return status; |
5312a3ed JG |
3551 | } |
3552 | ||
28ab034a | 3553 | static enum relay_connection_status relay_process_data_receive_header(struct relay_connection *conn) |
b8aa1682 | 3554 | { |
5312a3ed | 3555 | int ret; |
5569b118 | 3556 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed | 3557 | struct data_connection_state_receive_header *state = |
28ab034a | 3558 | &conn->protocol.data.state.receive_header; |
5312a3ed | 3559 | struct lttcomm_relayd_data_hdr header; |
b8aa1682 | 3560 | struct relay_stream *stream; |
5312a3ed | 3561 | |
a0377dfe | 3562 | LTTNG_ASSERT(state->left_to_receive != 0); |
5312a3ed JG |
3563 | |
3564 | ret = conn->sock->ops->recvmsg(conn->sock, | |
28ab034a JG |
3565 | state->header_reception_buffer + state->received, |
3566 | state->left_to_receive, | |
3567 | MSG_DONTWAIT); | |
5312a3ed | 3568 | if (ret < 0) { |
942003e5 MJ |
3569 | DIAGNOSTIC_PUSH |
3570 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
5569b118 | 3571 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
28ab034a | 3572 | DIAGNOSTIC_POP |
5569b118 JG |
3573 | PERROR("Unable to receive data header on sock %d", conn->sock->fd); |
3574 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3575 | } | |
5312a3ed JG |
3576 | goto end; |
3577 | } else if (ret == 0) { | |
3578 | /* Orderly shutdown. Not necessary to print an error. */ | |
3579 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3580 | status = RELAY_CONNECTION_STATUS_CLOSED; |
b8aa1682 JD |
3581 | goto end; |
3582 | } | |
3583 | ||
a0377dfe FD |
3584 | LTTNG_ASSERT(ret > 0); |
3585 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3586 | |
3587 | state->left_to_receive -= ret; | |
3588 | state->received += ret; | |
3589 | ||
3590 | if (state->left_to_receive > 0) { | |
3591 | /* | |
3592 | * Can't transition to the protocol's next state, wait to | |
3593 | * receive the rest of the header. | |
3594 | */ | |
28ab034a JG |
3595 | DBG3("Partial reception of data connection header (received %" PRIu64 |
3596 | " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3597 | state->received, | |
3598 | state->left_to_receive, | |
3599 | conn->sock->fd); | |
7591bab1 | 3600 | goto end; |
b8aa1682 | 3601 | } |
b8aa1682 | 3602 | |
5312a3ed JG |
3603 | /* Transition to next state: receiving the payload. */ |
3604 | conn->protocol.data.state_id = DATA_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
173af62f | 3605 | |
5312a3ed JG |
3606 | memcpy(&header, state->header_reception_buffer, sizeof(header)); |
3607 | header.circuit_id = be64toh(header.circuit_id); | |
3608 | header.stream_id = be64toh(header.stream_id); | |
3609 | header.data_size = be32toh(header.data_size); | |
3610 | header.net_seq_num = be64toh(header.net_seq_num); | |
3611 | header.padding_size = be32toh(header.padding_size); | |
3612 | memcpy(&conn->protocol.data.state.receive_payload.header, &header, sizeof(header)); | |
3613 | ||
28ab034a | 3614 | conn->protocol.data.state.receive_payload.left_to_receive = header.data_size; |
5312a3ed JG |
3615 | conn->protocol.data.state.receive_payload.received = 0; |
3616 | conn->protocol.data.state.receive_payload.rotate_index = false; | |
3617 | ||
28ab034a JG |
3618 | DBG("Received data connection header on fd %i: circuit_id = %" PRIu64 |
3619 | ", stream_id = %" PRIu64 ", data_size = %" PRIu32 ", net_seq_num = %" PRIu64 | |
3620 | ", padding_size = %" PRIu32, | |
3621 | conn->sock->fd, | |
3622 | header.circuit_id, | |
3623 | header.stream_id, | |
3624 | header.data_size, | |
3625 | header.net_seq_num, | |
3626 | header.padding_size); | |
5312a3ed JG |
3627 | |
3628 | stream = stream_get_by_id(header.stream_id); | |
3629 | if (!stream) { | |
3630 | DBG("relay_process_data_receive_payload: Cannot find stream %" PRIu64, | |
28ab034a | 3631 | header.stream_id); |
5569b118 JG |
3632 | /* Protocol error. */ |
3633 | status = RELAY_CONNECTION_STATUS_ERROR; | |
5312a3ed JG |
3634 | goto end; |
3635 | } | |
b8aa1682 | 3636 | |
7591bab1 | 3637 | pthread_mutex_lock(&stream->lock); |
c35f9726 | 3638 | /* Prepare stream for the reception of a new packet. */ |
28ab034a JG |
3639 | ret = stream_init_packet( |
3640 | stream, header.data_size, &conn->protocol.data.state.receive_payload.rotate_index); | |
c35f9726 JG |
3641 | pthread_mutex_unlock(&stream->lock); |
3642 | if (ret) { | |
3643 | ERR("Failed to rotate stream output file"); | |
3644 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3645 | goto end_stream_unlock; | |
1c20f0e2 JD |
3646 | } |
3647 | ||
5312a3ed | 3648 | end_stream_unlock: |
5312a3ed JG |
3649 | stream_put(stream); |
3650 | end: | |
5569b118 | 3651 | return status; |
5312a3ed JG |
3652 | } |
3653 | ||
28ab034a JG |
3654 | static enum relay_connection_status |
3655 | relay_process_data_receive_payload(struct relay_connection *conn) | |
5312a3ed JG |
3656 | { |
3657 | int ret; | |
5569b118 | 3658 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3659 | struct relay_stream *stream; |
3660 | struct data_connection_state_receive_payload *state = | |
28ab034a | 3661 | &conn->protocol.data.state.receive_payload; |
5312a3ed JG |
3662 | const size_t chunk_size = RECV_DATA_BUFFER_SIZE; |
3663 | char data_buffer[chunk_size]; | |
3664 | bool partial_recv = false; | |
3665 | bool new_stream = false, close_requested = false, index_flushed = false; | |
3666 | uint64_t left_to_receive = state->left_to_receive; | |
3667 | struct relay_session *session; | |
3668 | ||
28ab034a JG |
3669 | DBG3("Receiving data for stream id %" PRIu64 " seqnum %" PRIu64 ", %" PRIu64 |
3670 | " bytes received, %" PRIu64 " bytes left to receive", | |
3671 | state->header.stream_id, | |
3672 | state->header.net_seq_num, | |
3673 | state->received, | |
3674 | left_to_receive); | |
fd0f1e3e | 3675 | |
5312a3ed JG |
3676 | stream = stream_get_by_id(state->header.stream_id); |
3677 | if (!stream) { | |
5569b118 | 3678 | /* Protocol error. */ |
fd0f1e3e | 3679 | ERR("relay_process_data_receive_payload: cannot find stream %" PRIu64, |
28ab034a | 3680 | state->header.stream_id); |
5569b118 | 3681 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed | 3682 | goto end; |
1c20f0e2 JD |
3683 | } |
3684 | ||
5312a3ed JG |
3685 | pthread_mutex_lock(&stream->lock); |
3686 | session = stream->trace->session; | |
fd0f1e3e JR |
3687 | if (!conn->session) { |
3688 | ret = connection_set_session(conn, session); | |
3689 | if (ret) { | |
3690 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3691 | goto end_stream_unlock; | |
3692 | } | |
3693 | } | |
5312a3ed JG |
3694 | |
3695 | /* | |
3696 | * The size of the "chunk" received on any iteration is bounded by: | |
3697 | * - the data left to receive, | |
3698 | * - the data immediately available on the socket, | |
3699 | * - the on-stack data buffer | |
3700 | */ | |
3701 | while (left_to_receive > 0 && !partial_recv) { | |
ff2aa8f0 | 3702 | size_t recv_size = std::min<uint64_t>(left_to_receive, chunk_size); |
c35f9726 | 3703 | struct lttng_buffer_view packet_chunk; |
5312a3ed | 3704 | |
28ab034a | 3705 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, recv_size, MSG_DONTWAIT); |
5312a3ed | 3706 | if (ret < 0) { |
942003e5 MJ |
3707 | DIAGNOSTIC_PUSH |
3708 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
5569b118 | 3709 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
28ab034a | 3710 | DIAGNOSTIC_POP |
5569b118 JG |
3711 | PERROR("Socket %d error", conn->sock->fd); |
3712 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3713 | } | |
0848dba7 | 3714 | goto end_stream_unlock; |
5312a3ed JG |
3715 | } else if (ret == 0) { |
3716 | /* No more data ready to be consumed on socket. */ | |
3717 | DBG3("No more data ready for consumption on data socket of stream id %" PRIu64, | |
28ab034a | 3718 | state->header.stream_id); |
5569b118 | 3719 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3720 | break; |
3721 | } else if (ret < (int) recv_size) { | |
3722 | /* | |
3723 | * All the data available on the socket has been | |
3724 | * consumed. | |
3725 | */ | |
3726 | partial_recv = true; | |
c35f9726 | 3727 | recv_size = ret; |
0848dba7 MD |
3728 | } |
3729 | ||
28ab034a | 3730 | packet_chunk = lttng_buffer_view_init(data_buffer, 0, recv_size); |
a0377dfe | 3731 | LTTNG_ASSERT(packet_chunk.data); |
5312a3ed | 3732 | |
c35f9726 JG |
3733 | ret = stream_write(stream, &packet_chunk, 0); |
3734 | if (ret) { | |
0848dba7 | 3735 | ERR("Relay error writing data to file"); |
5569b118 | 3736 | status = RELAY_CONNECTION_STATUS_ERROR; |
0848dba7 MD |
3737 | goto end_stream_unlock; |
3738 | } | |
3739 | ||
5312a3ed JG |
3740 | left_to_receive -= recv_size; |
3741 | state->received += recv_size; | |
3742 | state->left_to_receive = left_to_receive; | |
5312a3ed JG |
3743 | } |
3744 | ||
3745 | if (state->left_to_receive > 0) { | |
3746 | /* | |
3747 | * Did not receive all the data expected, wait for more data to | |
3748 | * become available on the socket. | |
3749 | */ | |
28ab034a JG |
3750 | DBG3("Partial receive on data connection of stream id %" PRIu64 ", %" PRIu64 |
3751 | " bytes received, %" PRIu64 " bytes left to receive", | |
3752 | state->header.stream_id, | |
3753 | state->received, | |
3754 | state->left_to_receive); | |
5312a3ed | 3755 | goto end_stream_unlock; |
0848dba7 | 3756 | } |
5ab7344e | 3757 | |
cd9adb8b | 3758 | ret = stream_write(stream, nullptr, state->header.padding_size); |
c35f9726 | 3759 | if (ret) { |
5569b118 | 3760 | status = RELAY_CONNECTION_STATUS_ERROR; |
7591bab1 | 3761 | goto end_stream_unlock; |
1d4dfdef | 3762 | } |
5312a3ed | 3763 | |
298a25ca | 3764 | if (session_streams_have_index(session)) { |
28ab034a JG |
3765 | ret = stream_update_index(stream, |
3766 | state->header.net_seq_num, | |
3767 | state->rotate_index, | |
3768 | &index_flushed, | |
3769 | state->header.data_size + state->header.padding_size); | |
5312a3ed | 3770 | if (ret < 0) { |
28ab034a JG |
3771 | ERR("Failed to update index: stream %" PRIu64 " net_seq_num %" PRIu64 |
3772 | " ret %d", | |
3773 | stream->stream_handle, | |
3774 | state->header.net_seq_num, | |
3775 | ret); | |
5569b118 | 3776 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3777 | goto end_stream_unlock; |
3778 | } | |
3779 | } | |
3780 | ||
a8f9f353 | 3781 | if (stream->prev_data_seq == -1ULL) { |
c0bae11d MD |
3782 | new_stream = true; |
3783 | } | |
3784 | ||
28ab034a JG |
3785 | ret = stream_complete_packet(stream, |
3786 | state->header.data_size + state->header.padding_size, | |
3787 | state->header.net_seq_num, | |
3788 | index_flushed); | |
c35f9726 JG |
3789 | if (ret) { |
3790 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3791 | goto end_stream_unlock; | |
3792 | } | |
5312a3ed JG |
3793 | |
3794 | /* | |
3795 | * Resetting the protocol state (to RECEIVE_HEADER) will trash the | |
3796 | * contents of *state which are aliased (union) to the same location as | |
3797 | * the new state. Don't use it beyond this point. | |
3798 | */ | |
3799 | connection_reset_protocol_state(conn); | |
cd9adb8b | 3800 | state = nullptr; |
173af62f | 3801 | |
7591bab1 | 3802 | end_stream_unlock: |
bda7c7b9 | 3803 | close_requested = stream->close_requested; |
7591bab1 | 3804 | pthread_mutex_unlock(&stream->lock); |
5312a3ed | 3805 | if (close_requested && left_to_receive == 0) { |
bda7c7b9 JG |
3806 | try_stream_close(stream); |
3807 | } | |
3808 | ||
c0bae11d MD |
3809 | if (new_stream) { |
3810 | pthread_mutex_lock(&session->lock); | |
3811 | uatomic_set(&session->new_streams, 1); | |
3812 | pthread_mutex_unlock(&session->lock); | |
3813 | } | |
5312a3ed | 3814 | |
7591bab1 | 3815 | stream_put(stream); |
b8aa1682 | 3816 | end: |
5569b118 | 3817 | return status; |
b8aa1682 JD |
3818 | } |
3819 | ||
5312a3ed JG |
3820 | /* |
3821 | * relay_process_data: Process the data received on the data socket | |
3822 | */ | |
28ab034a | 3823 | static enum relay_connection_status relay_process_data(struct relay_connection *conn) |
5312a3ed | 3824 | { |
5569b118 | 3825 | enum relay_connection_status status; |
5312a3ed JG |
3826 | |
3827 | switch (conn->protocol.data.state_id) { | |
3828 | case DATA_CONNECTION_STATE_RECEIVE_HEADER: | |
5569b118 | 3829 | status = relay_process_data_receive_header(conn); |
5312a3ed JG |
3830 | break; |
3831 | case DATA_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
5569b118 | 3832 | status = relay_process_data_receive_payload(conn); |
5312a3ed JG |
3833 | break; |
3834 | default: | |
3835 | ERR("Unexpected data connection communication state."); | |
3836 | abort(); | |
3837 | } | |
3838 | ||
5569b118 | 3839 | return status; |
5312a3ed JG |
3840 | } |
3841 | ||
7591bab1 | 3842 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
3843 | { |
3844 | int ret; | |
3845 | ||
58eb9381 | 3846 | (void) lttng_poll_del(events, pollfd); |
b8aa1682 | 3847 | |
28ab034a | 3848 | ret = fd_tracker_close_unsuspendable_fd( |
cd9adb8b | 3849 | the_fd_tracker, &pollfd, 1, fd_tracker_util_close_fd, nullptr); |
b8aa1682 JD |
3850 | if (ret < 0) { |
3851 | ERR("Closing pollfd %d", pollfd); | |
3852 | } | |
3853 | } | |
3854 | ||
7591bab1 | 3855 | static void relay_thread_close_connection(struct lttng_poll_event *events, |
28ab034a JG |
3856 | int pollfd, |
3857 | struct relay_connection *conn) | |
9d1bbf21 | 3858 | { |
7591bab1 | 3859 | const char *type_str; |
2a174661 | 3860 | |
7591bab1 MD |
3861 | switch (conn->type) { |
3862 | case RELAY_DATA: | |
3863 | type_str = "Data"; | |
3864 | break; | |
3865 | case RELAY_CONTROL: | |
3866 | type_str = "Control"; | |
3867 | break; | |
3868 | case RELAY_VIEWER_COMMAND: | |
3869 | type_str = "Viewer Command"; | |
3870 | break; | |
3871 | case RELAY_VIEWER_NOTIFICATION: | |
3872 | type_str = "Viewer Notification"; | |
3873 | break; | |
3874 | default: | |
3875 | type_str = "Unknown"; | |
9d1bbf21 | 3876 | } |
7591bab1 MD |
3877 | cleanup_connection_pollfd(events, pollfd); |
3878 | connection_put(conn); | |
3879 | DBG("%s connection closed with %d", type_str, pollfd); | |
b8aa1682 JD |
3880 | } |
3881 | ||
3882 | /* | |
3883 | * This thread does the actual work | |
3884 | */ | |
f46376a1 | 3885 | static void *relay_thread_worker(void *data __attribute__((unused))) |
b8aa1682 | 3886 | { |
beaad64c DG |
3887 | int ret, err = -1, last_seen_data_fd = -1; |
3888 | uint32_t nb_fd; | |
b8aa1682 JD |
3889 | struct lttng_poll_event events; |
3890 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 3891 | struct lttng_ht_iter iter; |
cd9adb8b | 3892 | struct relay_connection *destroy_conn = nullptr; |
b8aa1682 JD |
3893 | |
3894 | DBG("[thread] Relay worker started"); | |
3895 | ||
9d1bbf21 MD |
3896 | rcu_register_thread(); |
3897 | ||
55706a7d MD |
3898 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
3899 | ||
9b5e0863 MD |
3900 | if (testpoint(relayd_thread_worker)) { |
3901 | goto error_testpoint; | |
3902 | } | |
3903 | ||
f385ae0a MD |
3904 | health_code_update(); |
3905 | ||
b8aa1682 JD |
3906 | /* table of connections indexed on socket */ |
3907 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
3908 | if (!relay_connections_ht) { |
3909 | goto relay_connections_ht_error; | |
3910 | } | |
b8aa1682 | 3911 | |
e32a0864 | 3912 | ret = create_named_thread_poll_set(&events, 2, "Worker thread epoll"); |
b8aa1682 JD |
3913 | if (ret < 0) { |
3914 | goto error_poll_create; | |
3915 | } | |
3916 | ||
58eb9381 | 3917 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
3918 | if (ret < 0) { |
3919 | goto error; | |
3920 | } | |
3921 | ||
beaad64c | 3922 | restart: |
cd9adb8b | 3923 | while (true) { |
beaad64c DG |
3924 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
3925 | ||
f385ae0a MD |
3926 | health_code_update(); |
3927 | ||
b8aa1682 | 3928 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 3929 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 3930 | health_poll_entry(); |
b8aa1682 | 3931 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 3932 | health_poll_exit(); |
b8aa1682 JD |
3933 | if (ret < 0) { |
3934 | /* | |
3935 | * Restart interrupted system call. | |
3936 | */ | |
3937 | if (errno == EINTR) { | |
3938 | goto restart; | |
3939 | } | |
3940 | goto error; | |
3941 | } | |
3942 | ||
0d9c5d77 DG |
3943 | nb_fd = ret; |
3944 | ||
beaad64c | 3945 | /* |
7591bab1 MD |
3946 | * Process control. The control connection is |
3947 | * prioritized so we don't starve it with high | |
3948 | * throughput tracing data on the data connection. | |
beaad64c | 3949 | */ |
b8aa1682 JD |
3950 | for (i = 0; i < nb_fd; i++) { |
3951 | /* Fetch once the poll data */ | |
8a00688e MJ |
3952 | const auto revents = LTTNG_POLL_GETEV(&events, i); |
3953 | const auto pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 3954 | |
f385ae0a MD |
3955 | health_code_update(); |
3956 | ||
8a00688e MJ |
3957 | /* Activity on thread quit pipe, exiting. */ |
3958 | if (relayd_is_thread_quit_pipe(pollfd)) { | |
3959 | DBG("Activity on thread quit pipe"); | |
095a4ae5 MD |
3960 | err = 0; |
3961 | goto exit; | |
b8aa1682 JD |
3962 | } |
3963 | ||
58eb9381 DG |
3964 | /* Inspect the relay conn pipe for new connection */ |
3965 | if (pollfd == relay_conn_pipe[0]) { | |
03e43155 | 3966 | if (revents & LPOLLIN) { |
90e7d72f JG |
3967 | struct relay_connection *conn; |
3968 | ||
5c7248cd JG |
3969 | ret = lttng_read(relay_conn_pipe[0], |
3970 | &conn, | |
3971 | sizeof(conn)); /* NOLINT sizeof used on a | |
3972 | pointer. */ | |
b8aa1682 JD |
3973 | if (ret < 0) { |
3974 | goto error; | |
3975 | } | |
28ab034a JG |
3976 | ret = lttng_poll_add( |
3977 | &events, conn->sock->fd, LPOLLIN | LPOLLRDHUP); | |
73039936 FD |
3978 | if (ret) { |
3979 | ERR("Failed to add new connection file descriptor to poll set"); | |
3980 | goto error; | |
3981 | } | |
7591bab1 | 3982 | connection_ht_add(relay_connections_ht, conn); |
58eb9381 | 3983 | DBG("Connection socket %d added", conn->sock->fd); |
03e43155 MD |
3984 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3985 | ERR("Relay connection pipe error"); | |
3986 | goto error; | |
3987 | } else { | |
28ab034a JG |
3988 | ERR("Unexpected poll events %u for sock %d", |
3989 | revents, | |
3990 | pollfd); | |
03e43155 | 3991 | goto error; |
b8aa1682 | 3992 | } |
58eb9381 | 3993 | } else { |
90e7d72f JG |
3994 | struct relay_connection *ctrl_conn; |
3995 | ||
7591bab1 | 3996 | ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
58eb9381 | 3997 | /* If not found, there is a synchronization issue. */ |
a0377dfe | 3998 | LTTNG_ASSERT(ctrl_conn); |
58eb9381 | 3999 | |
03e43155 MD |
4000 | if (ctrl_conn->type == RELAY_DATA) { |
4001 | if (revents & LPOLLIN) { | |
beaad64c | 4002 | /* |
28ab034a JG |
4003 | * Flag the last seen data fd not deleted. It will |
4004 | * be used as the last seen fd if any fd gets | |
4005 | * deleted in this first loop. | |
beaad64c DG |
4006 | */ |
4007 | last_notdel_data_fd = pollfd; | |
4008 | } | |
03e43155 MD |
4009 | goto put_ctrl_connection; |
4010 | } | |
a0377dfe | 4011 | LTTNG_ASSERT(ctrl_conn->type == RELAY_CONTROL); |
03e43155 MD |
4012 | |
4013 | if (revents & LPOLLIN) { | |
5569b118 JG |
4014 | enum relay_connection_status status; |
4015 | ||
4016 | status = relay_process_control(ctrl_conn); | |
4017 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
fd0f1e3e | 4018 | /* |
28ab034a JG |
4019 | * On socket error flag the session as aborted to |
4020 | * force the cleanup of its stream otherwise it can | |
4021 | * leak during the lifetime of the relayd. | |
fd0f1e3e JR |
4022 | * |
4023 | * This prevents situations in which streams can be | |
4024 | * left opened because an index was received, the | |
4025 | * control connection is closed, and the data | |
28ab034a JG |
4026 | * connection is closed (uncleanly) before the |
4027 | * packet's data provided. | |
fd0f1e3e | 4028 | * |
28ab034a JG |
4029 | * Since the control connection encountered an |
4030 | * error, it is okay to be conservative and close | |
4031 | * the session right now as we can't rely on the | |
4032 | * protocol being respected anymore. | |
fd0f1e3e JR |
4033 | */ |
4034 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
4035 | session_abort(ctrl_conn->session); | |
4036 | } | |
4037 | ||
5569b118 | 4038 | /* Clear the connection on error or close. */ |
28ab034a JG |
4039 | relay_thread_close_connection( |
4040 | &events, pollfd, ctrl_conn); | |
03e43155 | 4041 | } |
5312a3ed | 4042 | seen_control = 1; |
03e43155 | 4043 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
28ab034a | 4044 | relay_thread_close_connection(&events, pollfd, ctrl_conn); |
03e43155 MD |
4045 | if (last_seen_data_fd == pollfd) { |
4046 | last_seen_data_fd = last_notdel_data_fd; | |
4047 | } | |
58eb9381 | 4048 | } else { |
03e43155 | 4049 | ERR("Unexpected poll events %u for control sock %d", |
28ab034a JG |
4050 | revents, |
4051 | pollfd); | |
03e43155 MD |
4052 | connection_put(ctrl_conn); |
4053 | goto error; | |
beaad64c | 4054 | } |
03e43155 | 4055 | put_ctrl_connection: |
7591bab1 | 4056 | connection_put(ctrl_conn); |
beaad64c DG |
4057 | } |
4058 | } | |
4059 | ||
4060 | /* | |
4061 | * The last loop handled a control request, go back to poll to make | |
4062 | * sure we prioritise the control socket. | |
4063 | */ | |
4064 | if (seen_control) { | |
4065 | continue; | |
4066 | } | |
4067 | ||
4068 | if (last_seen_data_fd >= 0) { | |
4069 | for (i = 0; i < nb_fd; i++) { | |
4070 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
4071 | |
4072 | health_code_update(); | |
4073 | ||
beaad64c DG |
4074 | if (last_seen_data_fd == pollfd) { |
4075 | idx = i; | |
4076 | break; | |
4077 | } | |
4078 | } | |
4079 | } | |
4080 | ||
4081 | /* Process data connection. */ | |
4082 | for (i = idx + 1; i < nb_fd; i++) { | |
4083 | /* Fetch the poll data. */ | |
4084 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
4085 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
90e7d72f | 4086 | struct relay_connection *data_conn; |
beaad64c | 4087 | |
f385ae0a MD |
4088 | health_code_update(); |
4089 | ||
fd20dac9 MD |
4090 | if (!revents) { |
4091 | /* No activity for this FD (poll implementation). */ | |
4092 | continue; | |
4093 | } | |
4094 | ||
beaad64c | 4095 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 4096 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
4097 | continue; |
4098 | } | |
4099 | ||
7591bab1 | 4100 | data_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
90e7d72f | 4101 | if (!data_conn) { |
fd20dac9 | 4102 | /* Skip it. Might be removed before. */ |
fd20dac9 MD |
4103 | continue; |
4104 | } | |
03e43155 MD |
4105 | if (data_conn->type == RELAY_CONTROL) { |
4106 | goto put_data_connection; | |
4107 | } | |
a0377dfe | 4108 | LTTNG_ASSERT(data_conn->type == RELAY_DATA); |
fd20dac9 MD |
4109 | |
4110 | if (revents & LPOLLIN) { | |
5569b118 JG |
4111 | enum relay_connection_status status; |
4112 | ||
4113 | status = relay_process_data(data_conn); | |
4114 | /* Connection closed or error. */ | |
4115 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
fd0f1e3e JR |
4116 | /* |
4117 | * On socket error flag the session as aborted to force | |
4118 | * the cleanup of its stream otherwise it can leak | |
4119 | * during the lifetime of the relayd. | |
4120 | * | |
4121 | * This prevents situations in which streams can be | |
4122 | * left opened because an index was received, the | |
4123 | * control connection is closed, and the data | |
4124 | * connection is closed (uncleanly) before the packet's | |
4125 | * data provided. | |
4126 | * | |
4127 | * Since the data connection encountered an error, | |
4128 | * it is okay to be conservative and close the | |
4129 | * session right now as we can't rely on the protocol | |
4130 | * being respected anymore. | |
4131 | */ | |
4132 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
4133 | session_abort(data_conn->session); | |
4134 | } | |
28ab034a | 4135 | relay_thread_close_connection(&events, pollfd, data_conn); |
fd20dac9 MD |
4136 | /* |
4137 | * Every goto restart call sets the last seen fd where | |
4138 | * here we don't really care since we gracefully | |
4139 | * continue the loop after the connection is deleted. | |
4140 | */ | |
4141 | } else { | |
4142 | /* Keep last seen port. */ | |
4143 | last_seen_data_fd = pollfd; | |
7591bab1 | 4144 | connection_put(data_conn); |
fd20dac9 | 4145 | goto restart; |
b8aa1682 | 4146 | } |
03e43155 | 4147 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
28ab034a | 4148 | relay_thread_close_connection(&events, pollfd, data_conn); |
03e43155 | 4149 | } else { |
28ab034a | 4150 | ERR("Unknown poll events %u for data sock %d", revents, pollfd); |
b8aa1682 | 4151 | } |
03e43155 | 4152 | put_data_connection: |
7591bab1 | 4153 | connection_put(data_conn); |
b8aa1682 | 4154 | } |
beaad64c | 4155 | last_seen_data_fd = -1; |
b8aa1682 JD |
4156 | } |
4157 | ||
f385ae0a MD |
4158 | /* Normal exit, no error */ |
4159 | ret = 0; | |
4160 | ||
095a4ae5 | 4161 | exit: |
b8aa1682 | 4162 | error: |
71efa8ef | 4163 | /* Cleanup remaining connection object. */ |
9d1bbf21 | 4164 | rcu_read_lock(); |
28ab034a | 4165 | cds_lfht_for_each_entry (relay_connections_ht->ht, &iter.iter, destroy_conn, sock_n.node) { |
f385ae0a | 4166 | health_code_update(); |
98ba050e | 4167 | |
fd0f1e3e | 4168 | session_abort(destroy_conn->session); |
98ba050e | 4169 | |
7591bab1 MD |
4170 | /* |
4171 | * No need to grab another ref, because we own | |
4172 | * destroy_conn. | |
4173 | */ | |
28ab034a | 4174 | relay_thread_close_connection(&events, destroy_conn->sock->fd, destroy_conn); |
b8aa1682 | 4175 | } |
94d49140 | 4176 | rcu_read_unlock(); |
7591bab1 | 4177 | |
e32a0864 | 4178 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
7d2f7452 | 4179 | error_poll_create: |
b8aa1682 | 4180 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 4181 | relay_connections_ht_error: |
58eb9381 | 4182 | /* Close relay conn pipes */ |
28ab034a | 4183 | (void) fd_tracker_util_pipe_close(the_fd_tracker, relay_conn_pipe); |
095a4ae5 MD |
4184 | if (err) { |
4185 | DBG("Thread exited with error"); | |
4186 | } | |
b8aa1682 | 4187 | DBG("Worker thread cleanup complete"); |
9b5e0863 | 4188 | error_testpoint: |
f385ae0a MD |
4189 | if (err) { |
4190 | health_error(); | |
4191 | ERR("Health error occurred in %s", __func__); | |
4192 | } | |
4193 | health_unregister(health_relayd); | |
9d1bbf21 | 4194 | rcu_unregister_thread(); |
b4aacfdc | 4195 | lttng_relay_stop_threads(); |
cd9adb8b | 4196 | return nullptr; |
b8aa1682 JD |
4197 | } |
4198 | ||
4199 | /* | |
4200 | * Create the relay command pipe to wake thread_manage_apps. | |
4201 | * Closed in cleanup(). | |
4202 | */ | |
cd9adb8b | 4203 | static int create_relay_conn_pipe() |
b8aa1682 | 4204 | { |
28ab034a JG |
4205 | return fd_tracker_util_pipe_open_cloexec( |
4206 | the_fd_tracker, "Relayd connection pipe", relay_conn_pipe); | |
b8aa1682 JD |
4207 | } |
4208 | ||
f46376a1 | 4209 | static int stdio_open(void *data __attribute__((unused)), int *fds) |
9c256b01 JG |
4210 | { |
4211 | fds[0] = fileno(stdout); | |
4212 | fds[1] = fileno(stderr); | |
4213 | return 0; | |
4214 | } | |
4215 | ||
cd9adb8b | 4216 | static int track_stdio() |
9c256b01 JG |
4217 | { |
4218 | int fds[2]; | |
4219 | const char *names[] = { "stdout", "stderr" }; | |
4220 | ||
cd9adb8b | 4221 | return fd_tracker_open_unsuspendable_fd(the_fd_tracker, fds, names, 2, stdio_open, nullptr); |
9c256b01 JG |
4222 | } |
4223 | ||
b8aa1682 JD |
4224 | /* |
4225 | * main | |
4226 | */ | |
4227 | int main(int argc, char **argv) | |
4228 | { | |
00e3b7f1 | 4229 | bool thread_is_rcu_registered = false; |
178a0557 | 4230 | int ret = 0, retval = 0; |
b8aa1682 | 4231 | void *status; |
cd9adb8b | 4232 | char *unlinked_file_directory_path = nullptr, *output_path = nullptr; |
b8aa1682 | 4233 | |
2a10de3b JR |
4234 | /* Parse environment variables */ |
4235 | ret = parse_env_options(); | |
4236 | if (ret) { | |
4237 | retval = -1; | |
4238 | goto exit_options; | |
4239 | } | |
4240 | ||
4241 | /* | |
4242 | * Parse arguments. | |
4243 | * Command line arguments overwrite environment. | |
4244 | */ | |
b8aa1682 | 4245 | progname = argv[0]; |
178a0557 MD |
4246 | if (set_options(argc, argv)) { |
4247 | retval = -1; | |
4248 | goto exit_options; | |
b8aa1682 JD |
4249 | } |
4250 | ||
178a0557 MD |
4251 | if (set_signal_handler()) { |
4252 | retval = -1; | |
4253 | goto exit_options; | |
b8aa1682 JD |
4254 | } |
4255 | ||
a3bc3918 JR |
4256 | relayd_config_log(); |
4257 | ||
4258 | if (opt_print_version) { | |
4259 | print_version(); | |
4260 | retval = 0; | |
4261 | goto exit_options; | |
4262 | } | |
4263 | ||
c0407718 JG |
4264 | ret = fclose(stdin); |
4265 | if (ret) { | |
4266 | PERROR("Failed to close stdin"); | |
4267 | goto exit_options; | |
4268 | } | |
4269 | ||
35ab25e5 MD |
4270 | DBG("Clear command %s", opt_allow_clear ? "allowed" : "disallowed"); |
4271 | ||
4d513a50 DG |
4272 | /* Try to create directory if -o, --output is specified. */ |
4273 | if (opt_output_path) { | |
994fa64f DG |
4274 | if (*opt_output_path != '/') { |
4275 | ERR("Please specify an absolute path for -o, --output PATH"); | |
178a0557 MD |
4276 | retval = -1; |
4277 | goto exit_options; | |
994fa64f DG |
4278 | } |
4279 | ||
28ab034a | 4280 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG, -1, -1); |
4d513a50 DG |
4281 | if (ret < 0) { |
4282 | ERR("Unable to create %s", opt_output_path); | |
178a0557 MD |
4283 | retval = -1; |
4284 | goto exit_options; | |
4d513a50 DG |
4285 | } |
4286 | } | |
4287 | ||
b8aa1682 | 4288 | /* Daemonize */ |
b5218ffb | 4289 | if (opt_daemon || opt_background) { |
28ab034a | 4290 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, !opt_background); |
b8aa1682 | 4291 | if (ret < 0) { |
178a0557 MD |
4292 | retval = -1; |
4293 | goto exit_options; | |
b8aa1682 | 4294 | } |
3fd27398 MD |
4295 | } |
4296 | ||
ce9ee1fb JR |
4297 | if (opt_working_directory) { |
4298 | ret = utils_change_working_directory(opt_working_directory); | |
4299 | if (ret) { | |
4300 | /* All errors are already logged. */ | |
4301 | goto exit_options; | |
4302 | } | |
4303 | } | |
4304 | ||
23c8ff50 JG |
4305 | sessiond_trace_chunk_registry = sessiond_trace_chunk_registry_create(); |
4306 | if (!sessiond_trace_chunk_registry) { | |
4307 | ERR("Failed to initialize session daemon trace chunk registry"); | |
4308 | retval = -1; | |
794e2e5f | 4309 | goto exit_options; |
23c8ff50 JG |
4310 | } |
4311 | ||
00e3b7f1 JG |
4312 | /* |
4313 | * The RCU thread registration (and use, through the fd-tracker's | |
4314 | * creation) is done after the daemonization to allow us to not | |
4315 | * deal with liburcu's fork() management as the call RCU needs to | |
4316 | * be restored. | |
4317 | */ | |
4318 | rcu_register_thread(); | |
4319 | thread_is_rcu_registered = true; | |
4320 | ||
f7c3ffd7 JG |
4321 | output_path = create_output_path(""); |
4322 | if (!output_path) { | |
4323 | ERR("Failed to get output path"); | |
4324 | retval = -1; | |
4325 | goto exit_options; | |
4326 | } | |
28ab034a JG |
4327 | ret = asprintf(&unlinked_file_directory_path, |
4328 | "%s/%s", | |
4329 | output_path, | |
4330 | DEFAULT_UNLINKED_FILES_DIRECTORY); | |
f7c3ffd7 JG |
4331 | free(output_path); |
4332 | if (ret < 0) { | |
4333 | ERR("Failed to format unlinked file directory path"); | |
4334 | retval = -1; | |
4335 | goto exit_options; | |
4336 | } | |
28ab034a | 4337 | the_fd_tracker = fd_tracker_create(unlinked_file_directory_path, lttng_opt_fd_pool_size); |
f7c3ffd7 | 4338 | free(unlinked_file_directory_path); |
00e3b7f1 JG |
4339 | if (!the_fd_tracker) { |
4340 | retval = -1; | |
4341 | goto exit_options; | |
4342 | } | |
4343 | ||
9c256b01 JG |
4344 | ret = track_stdio(); |
4345 | if (ret) { | |
4346 | retval = -1; | |
4347 | goto exit_options; | |
4348 | } | |
4349 | ||
178a0557 MD |
4350 | /* Initialize thread health monitoring */ |
4351 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
4352 | if (!health_relayd) { | |
4353 | PERROR("health_app_create error"); | |
4354 | retval = -1; | |
794e2e5f | 4355 | goto exit_options; |
178a0557 MD |
4356 | } |
4357 | ||
3fd27398 | 4358 | /* Create thread quit pipe */ |
8a00688e | 4359 | if (relayd_init_thread_quit_pipe()) { |
178a0557 | 4360 | retval = -1; |
794e2e5f | 4361 | goto exit_options; |
b8aa1682 JD |
4362 | } |
4363 | ||
b8aa1682 | 4364 | /* Setup the thread apps communication pipe. */ |
178a0557 MD |
4365 | if (create_relay_conn_pipe()) { |
4366 | retval = -1; | |
794e2e5f | 4367 | goto exit_options; |
b8aa1682 JD |
4368 | } |
4369 | ||
4370 | /* Init relay command queue. */ | |
8bdee6e2 | 4371 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 | 4372 | |
554831e7 MD |
4373 | /* Initialize communication library */ |
4374 | lttcomm_init(); | |
87e45c13 | 4375 | lttcomm_inet_init(); |
554831e7 | 4376 | |
d3e2ba59 | 4377 | /* tables of sessions indexed by session ID */ |
7591bab1 MD |
4378 | sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
4379 | if (!sessions_ht) { | |
178a0557 | 4380 | retval = -1; |
794e2e5f | 4381 | goto exit_options; |
d3e2ba59 JD |
4382 | } |
4383 | ||
4384 | /* tables of streams indexed by stream ID */ | |
2a174661 | 4385 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 | 4386 | if (!relay_streams_ht) { |
178a0557 | 4387 | retval = -1; |
794e2e5f | 4388 | goto exit_options; |
d3e2ba59 JD |
4389 | } |
4390 | ||
4391 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
4392 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
4393 | if (!viewer_streams_ht) { | |
178a0557 | 4394 | retval = -1; |
794e2e5f | 4395 | goto exit_options; |
55706a7d MD |
4396 | } |
4397 | ||
bcee2b96 | 4398 | ret = init_health_quit_pipe(); |
178a0557 MD |
4399 | if (ret) { |
4400 | retval = -1; | |
794e2e5f | 4401 | goto exit_options; |
65931c8b MD |
4402 | } |
4403 | ||
4404 | /* Create thread to manage the client socket */ | |
cd9adb8b JG |
4405 | ret = pthread_create(&health_thread, |
4406 | default_pthread_attr(), | |
4407 | thread_manage_health_relayd, | |
4408 | (void *) nullptr); | |
178a0557 MD |
4409 | if (ret) { |
4410 | errno = ret; | |
65931c8b | 4411 | PERROR("pthread_create health"); |
178a0557 | 4412 | retval = -1; |
794e2e5f | 4413 | goto exit_options; |
65931c8b MD |
4414 | } |
4415 | ||
b8aa1682 | 4416 | /* Setup the dispatcher thread */ |
cd9adb8b JG |
4417 | ret = pthread_create(&dispatcher_thread, |
4418 | default_pthread_attr(), | |
4419 | relay_thread_dispatcher, | |
4420 | (void *) nullptr); | |
178a0557 MD |
4421 | if (ret) { |
4422 | errno = ret; | |
b8aa1682 | 4423 | PERROR("pthread_create dispatcher"); |
178a0557 MD |
4424 | retval = -1; |
4425 | goto exit_dispatcher_thread; | |
b8aa1682 JD |
4426 | } |
4427 | ||
4428 | /* Setup the worker thread */ | |
cd9adb8b | 4429 | ret = pthread_create(&worker_thread, default_pthread_attr(), relay_thread_worker, nullptr); |
178a0557 MD |
4430 | if (ret) { |
4431 | errno = ret; | |
b8aa1682 | 4432 | PERROR("pthread_create worker"); |
178a0557 MD |
4433 | retval = -1; |
4434 | goto exit_worker_thread; | |
b8aa1682 JD |
4435 | } |
4436 | ||
4437 | /* Setup the listener thread */ | |
28ab034a | 4438 | ret = pthread_create( |
cd9adb8b | 4439 | &listener_thread, default_pthread_attr(), relay_thread_listener, (void *) nullptr); |
178a0557 MD |
4440 | if (ret) { |
4441 | errno = ret; | |
b8aa1682 | 4442 | PERROR("pthread_create listener"); |
178a0557 MD |
4443 | retval = -1; |
4444 | goto exit_listener_thread; | |
b8aa1682 JD |
4445 | } |
4446 | ||
7591bab1 | 4447 | ret = relayd_live_create(live_uri); |
178a0557 | 4448 | if (ret) { |
d3e2ba59 | 4449 | ERR("Starting live viewer threads"); |
178a0557 | 4450 | retval = -1; |
50138f51 | 4451 | goto exit_live; |
d3e2ba59 JD |
4452 | } |
4453 | ||
178a0557 MD |
4454 | /* |
4455 | * This is where we start awaiting program completion (e.g. through | |
4456 | * signal that asks threads to teardown). | |
4457 | */ | |
4458 | ||
4459 | ret = relayd_live_join(); | |
4460 | if (ret) { | |
4461 | retval = -1; | |
4462 | } | |
50138f51 | 4463 | exit_live: |
178a0557 | 4464 | |
b8aa1682 | 4465 | ret = pthread_join(listener_thread, &status); |
178a0557 MD |
4466 | if (ret) { |
4467 | errno = ret; | |
4468 | PERROR("pthread_join listener_thread"); | |
4469 | retval = -1; | |
b8aa1682 JD |
4470 | } |
4471 | ||
178a0557 | 4472 | exit_listener_thread: |
b8aa1682 | 4473 | ret = pthread_join(worker_thread, &status); |
178a0557 MD |
4474 | if (ret) { |
4475 | errno = ret; | |
4476 | PERROR("pthread_join worker_thread"); | |
4477 | retval = -1; | |
b8aa1682 JD |
4478 | } |
4479 | ||
178a0557 | 4480 | exit_worker_thread: |
b8aa1682 | 4481 | ret = pthread_join(dispatcher_thread, &status); |
178a0557 MD |
4482 | if (ret) { |
4483 | errno = ret; | |
4484 | PERROR("pthread_join dispatcher_thread"); | |
4485 | retval = -1; | |
b8aa1682 | 4486 | } |
178a0557 | 4487 | exit_dispatcher_thread: |
42415026 | 4488 | |
65931c8b | 4489 | ret = pthread_join(health_thread, &status); |
178a0557 MD |
4490 | if (ret) { |
4491 | errno = ret; | |
4492 | PERROR("pthread_join health_thread"); | |
4493 | retval = -1; | |
65931c8b | 4494 | } |
178a0557 | 4495 | exit_options: |
4d62fbf8 MD |
4496 | /* |
4497 | * Wait for all pending call_rcu work to complete before tearing | |
4498 | * down data structures. call_rcu worker may be trying to | |
4499 | * perform lookups in those structures. | |
4500 | */ | |
4501 | rcu_barrier(); | |
7591bab1 MD |
4502 | relayd_cleanup(); |
4503 | ||
4504 | /* Ensure all prior call_rcu are done. */ | |
4505 | rcu_barrier(); | |
d3e2ba59 | 4506 | |
00e3b7f1 JG |
4507 | if (thread_is_rcu_registered) { |
4508 | rcu_unregister_thread(); | |
4509 | } | |
4510 | ||
178a0557 | 4511 | if (!retval) { |
b8aa1682 | 4512 | exit(EXIT_SUCCESS); |
178a0557 MD |
4513 | } else { |
4514 | exit(EXIT_FAILURE); | |
b8aa1682 | 4515 | } |
b8aa1682 | 4516 | } |