| 1 | /* |
| 2 | * Copyright (C) 2011 EfficiOS Inc. |
| 3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0-only |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | #define _LGPL_SOURCE |
| 10 | #include "health-consumerd.hpp" |
| 11 | #include "lttng-consumerd.hpp" |
| 12 | |
| 13 | #include <common/common.hpp> |
| 14 | #include <common/compat/getenv.hpp> |
| 15 | #include <common/compat/poll.hpp> |
| 16 | #include <common/consumer/consumer-timer.hpp> |
| 17 | #include <common/consumer/consumer.hpp> |
| 18 | #include <common/defaults.hpp> |
| 19 | #include <common/sessiond-comm/sessiond-comm.hpp> |
| 20 | #include <common/utils.hpp> |
| 21 | |
| 22 | #include <fcntl.h> |
| 23 | #include <getopt.h> |
| 24 | #include <grp.h> |
| 25 | #include <limits.h> |
| 26 | #include <poll.h> |
| 27 | #include <pthread.h> |
| 28 | #include <signal.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | #include <sys/ipc.h> |
| 33 | #include <sys/mman.h> |
| 34 | #include <sys/resource.h> |
| 35 | #include <sys/shm.h> |
| 36 | #include <sys/socket.h> |
| 37 | #include <sys/stat.h> |
| 38 | #include <sys/types.h> |
| 39 | #include <ulimit.h> |
| 40 | #include <unistd.h> |
| 41 | #include <urcu/compiler.h> |
| 42 | #include <urcu/list.h> |
| 43 | |
| 44 | /* threads (channel handling, poll, metadata, sessiond) */ |
| 45 | |
| 46 | static pthread_t channel_thread, data_thread, metadata_thread, sessiond_thread, |
| 47 | metadata_timer_thread, health_thread; |
| 48 | static bool metadata_timer_thread_online; |
| 49 | |
| 50 | /* to count the number of times the user pressed ctrl+c */ |
| 51 | static int sigintcount = 0; |
| 52 | |
| 53 | /* Argument variables */ |
| 54 | int lttng_opt_quiet; /* not static in error.h */ |
| 55 | int lttng_opt_verbose; /* not static in error.h */ |
| 56 | int lttng_opt_mi; /* not static in error.h */ |
| 57 | |
| 58 | static int opt_daemon; |
| 59 | static const char *progname; |
| 60 | static char command_sock_path[PATH_MAX]; /* Global command socket path */ |
| 61 | static char error_sock_path[PATH_MAX]; /* Global error path */ |
| 62 | static enum lttng_consumer_type opt_type = LTTNG_CONSUMER_KERNEL; |
| 63 | |
| 64 | /* the liblttngconsumerd context */ |
| 65 | static struct lttng_consumer_local_data *the_consumer_context; |
| 66 | |
| 67 | /* Consumerd health monitoring */ |
| 68 | struct health_app *health_consumerd; |
| 69 | |
| 70 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
| 71 | |
| 72 | int lttng_consumer_ready = NR_LTTNG_CONSUMER_READY; |
| 73 | |
| 74 | enum lttng_consumer_type lttng_consumer_get_type(void) |
| 75 | { |
| 76 | if (!the_consumer_context) { |
| 77 | return LTTNG_CONSUMER_UNKNOWN; |
| 78 | } |
| 79 | return the_consumer_context->type; |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Signal handler for the daemon |
| 84 | */ |
| 85 | static void sighandler(int sig, siginfo_t *siginfo, void *arg __attribute__((unused))) |
| 86 | { |
| 87 | if (sig == SIGINT && sigintcount++ == 0) { |
| 88 | DBG("ignoring first SIGINT"); |
| 89 | return; |
| 90 | } |
| 91 | |
| 92 | if (sig == SIGBUS) { |
| 93 | int write_ret; |
| 94 | const char msg[] = "Received SIGBUS, aborting program.\n"; |
| 95 | |
| 96 | lttng_consumer_sigbus_handle(siginfo->si_addr); |
| 97 | /* |
| 98 | * If ustctl did not catch this signal (triggering a |
| 99 | * siglongjmp), abort the program. Otherwise, the execution |
| 100 | * will resume from the ust-ctl call which caused this error. |
| 101 | * |
| 102 | * The return value is ignored since the program aborts anyhow. |
| 103 | */ |
| 104 | write_ret = write(STDERR_FILENO, msg, sizeof(msg)); |
| 105 | (void) write_ret; |
| 106 | abort(); |
| 107 | } |
| 108 | |
| 109 | if (the_consumer_context) { |
| 110 | lttng_consumer_should_exit(the_consumer_context); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * Setup signal handler for : |
| 116 | * SIGINT, SIGTERM, SIGPIPE, SIGBUS |
| 117 | */ |
| 118 | static int set_signal_handler() |
| 119 | { |
| 120 | int ret = 0; |
| 121 | struct sigaction sa; |
| 122 | sigset_t sigset; |
| 123 | |
| 124 | if ((ret = sigemptyset(&sigset)) < 0) { |
| 125 | PERROR("sigemptyset"); |
| 126 | return ret; |
| 127 | } |
| 128 | |
| 129 | sa.sa_mask = sigset; |
| 130 | sa.sa_flags = SA_SIGINFO; |
| 131 | |
| 132 | sa.sa_sigaction = sighandler; |
| 133 | if ((ret = sigaction(SIGTERM, &sa, nullptr)) < 0) { |
| 134 | PERROR("sigaction"); |
| 135 | return ret; |
| 136 | } |
| 137 | |
| 138 | if ((ret = sigaction(SIGINT, &sa, nullptr)) < 0) { |
| 139 | PERROR("sigaction"); |
| 140 | return ret; |
| 141 | } |
| 142 | |
| 143 | if ((ret = sigaction(SIGBUS, &sa, nullptr)) < 0) { |
| 144 | PERROR("sigaction"); |
| 145 | return ret; |
| 146 | } |
| 147 | |
| 148 | sa.sa_flags = 0; |
| 149 | sa.sa_handler = SIG_IGN; |
| 150 | if ((ret = sigaction(SIGPIPE, &sa, nullptr)) < 0) { |
| 151 | PERROR("sigaction"); |
| 152 | return ret; |
| 153 | } |
| 154 | |
| 155 | return ret; |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * Usage function on stream file. |
| 160 | */ |
| 161 | static void usage(FILE *fp) |
| 162 | { |
| 163 | fprintf(fp, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
| 164 | fprintf(fp, |
| 165 | " -h, --help " |
| 166 | "Display this usage.\n"); |
| 167 | fprintf(fp, |
| 168 | " -c, --consumerd-cmd-sock PATH " |
| 169 | "Specify path for the command socket\n"); |
| 170 | fprintf(fp, |
| 171 | " -e, --consumerd-err-sock PATH " |
| 172 | "Specify path for the error socket\n"); |
| 173 | fprintf(fp, |
| 174 | " -d, --daemonize " |
| 175 | "Start as a daemon.\n"); |
| 176 | fprintf(fp, |
| 177 | " -q, --quiet " |
| 178 | "No output at all.\n"); |
| 179 | fprintf(fp, |
| 180 | " -v, --verbose " |
| 181 | "Verbose mode. Activate DBG() macro.\n"); |
| 182 | fprintf(fp, |
| 183 | " -V, --version " |
| 184 | "Show version number.\n"); |
| 185 | fprintf(fp, |
| 186 | " -g, --group NAME " |
| 187 | "Specify the tracing group name. (default: tracing)\n"); |
| 188 | fprintf(fp, |
| 189 | " -k, --kernel " |
| 190 | "Consumer kernel buffers (default).\n"); |
| 191 | fprintf(fp, |
| 192 | " -u, --ust " |
| 193 | "Consumer UST buffers.%s\n", |
| 194 | #ifdef HAVE_LIBLTTNG_UST_CTL |
| 195 | "" |
| 196 | #else |
| 197 | " (support not compiled in)" |
| 198 | #endif |
| 199 | ); |
| 200 | } |
| 201 | |
| 202 | /* |
| 203 | * daemon argument parsing |
| 204 | */ |
| 205 | static int parse_args(int argc, char **argv) |
| 206 | { |
| 207 | int c, ret = 0; |
| 208 | |
| 209 | static struct option long_options[] = { { "consumerd-cmd-sock", 1, nullptr, 'c' }, |
| 210 | { "consumerd-err-sock", 1, nullptr, 'e' }, |
| 211 | { "daemonize", 0, nullptr, 'd' }, |
| 212 | { "group", 1, nullptr, 'g' }, |
| 213 | { "help", 0, nullptr, 'h' }, |
| 214 | { "quiet", 0, nullptr, 'q' }, |
| 215 | { "verbose", 0, nullptr, 'v' }, |
| 216 | { "version", 0, nullptr, 'V' }, |
| 217 | { "kernel", 0, nullptr, 'k' }, |
| 218 | #ifdef HAVE_LIBLTTNG_UST_CTL |
| 219 | { "ust", 0, nullptr, 'u' }, |
| 220 | #endif |
| 221 | { nullptr, 0, nullptr, 0 } }; |
| 222 | |
| 223 | while (true) { |
| 224 | int option_index = 0; |
| 225 | c = getopt_long(argc, |
| 226 | argv, |
| 227 | "dhqvVku" |
| 228 | "c:e:g:", |
| 229 | long_options, |
| 230 | &option_index); |
| 231 | if (c == -1) { |
| 232 | break; |
| 233 | } |
| 234 | |
| 235 | switch (c) { |
| 236 | case 0: |
| 237 | fprintf(stderr, "option %s", long_options[option_index].name); |
| 238 | if (optarg) { |
| 239 | fprintf(stderr, " with arg %s\n", optarg); |
| 240 | ret = -1; |
| 241 | goto end; |
| 242 | } |
| 243 | break; |
| 244 | case 'c': |
| 245 | if (lttng_is_setuid_setgid()) { |
| 246 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", |
| 247 | "-c, --consumerd-cmd-sock"); |
| 248 | } else { |
| 249 | snprintf(command_sock_path, PATH_MAX, "%s", optarg); |
| 250 | } |
| 251 | break; |
| 252 | case 'e': |
| 253 | if (lttng_is_setuid_setgid()) { |
| 254 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", |
| 255 | "-e, --consumerd-err-sock"); |
| 256 | } else { |
| 257 | snprintf(error_sock_path, PATH_MAX, "%s", optarg); |
| 258 | } |
| 259 | break; |
| 260 | case 'd': |
| 261 | opt_daemon = 1; |
| 262 | break; |
| 263 | case 'g': |
| 264 | if (lttng_is_setuid_setgid()) { |
| 265 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", |
| 266 | "-g, --group"); |
| 267 | } else { |
| 268 | tracing_group_name = optarg; |
| 269 | } |
| 270 | break; |
| 271 | case 'h': |
| 272 | usage(stdout); |
| 273 | exit(EXIT_SUCCESS); |
| 274 | case 'q': |
| 275 | lttng_opt_quiet = 1; |
| 276 | break; |
| 277 | case 'v': |
| 278 | lttng_opt_verbose = 3; |
| 279 | break; |
| 280 | case 'V': |
| 281 | fprintf(stdout, "%s\n", VERSION); |
| 282 | exit(EXIT_SUCCESS); |
| 283 | case 'k': |
| 284 | opt_type = LTTNG_CONSUMER_KERNEL; |
| 285 | break; |
| 286 | #ifdef HAVE_LIBLTTNG_UST_CTL |
| 287 | case 'u': |
| 288 | #if (CAA_BITS_PER_LONG == 64) |
| 289 | opt_type = LTTNG_CONSUMER64_UST; |
| 290 | #elif (CAA_BITS_PER_LONG == 32) |
| 291 | opt_type = LTTNG_CONSUMER32_UST; |
| 292 | #else |
| 293 | #error "Unknown bitness" |
| 294 | #endif |
| 295 | break; |
| 296 | #endif |
| 297 | default: |
| 298 | usage(stderr); |
| 299 | ret = -1; |
| 300 | goto end; |
| 301 | } |
| 302 | } |
| 303 | end: |
| 304 | return ret; |
| 305 | } |
| 306 | |
| 307 | /* |
| 308 | * Set open files limit to unlimited. This daemon can open a large number of |
| 309 | * file descriptors in order to consumer multiple kernel traces. |
| 310 | */ |
| 311 | static void set_ulimit() |
| 312 | { |
| 313 | int ret; |
| 314 | struct rlimit lim; |
| 315 | |
| 316 | /* The kernel does not allowed an infinite limit for open files */ |
| 317 | lim.rlim_cur = 65535; |
| 318 | lim.rlim_max = 65535; |
| 319 | |
| 320 | ret = setrlimit(RLIMIT_NOFILE, &lim); |
| 321 | if (ret < 0) { |
| 322 | PERROR("failed to set open files limit"); |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | /* |
| 327 | * main |
| 328 | */ |
| 329 | int main(int argc, char **argv) |
| 330 | { |
| 331 | int ret = 0, retval = 0; |
| 332 | void *status; |
| 333 | struct lttng_consumer_local_data *tmp_ctx; |
| 334 | |
| 335 | rcu_register_thread(); |
| 336 | |
| 337 | if (run_as_create_worker(argv[0], nullptr, nullptr) < 0) { |
| 338 | goto exit_set_signal_handler; |
| 339 | } |
| 340 | |
| 341 | if (set_signal_handler()) { |
| 342 | retval = -1; |
| 343 | goto exit_set_signal_handler; |
| 344 | } |
| 345 | |
| 346 | /* Parse arguments */ |
| 347 | progname = argv[0]; |
| 348 | if (parse_args(argc, argv)) { |
| 349 | retval = -1; |
| 350 | goto exit_options; |
| 351 | } |
| 352 | |
| 353 | /* Daemonize */ |
| 354 | if (opt_daemon) { |
| 355 | int i; |
| 356 | |
| 357 | /* |
| 358 | * fork |
| 359 | * child: setsid, close FD 0, 1, 2, chdir / |
| 360 | * parent: exit (if fork is successful) |
| 361 | */ |
| 362 | ret = daemon(0, 0); |
| 363 | if (ret < 0) { |
| 364 | PERROR("daemon"); |
| 365 | retval = -1; |
| 366 | goto exit_options; |
| 367 | } |
| 368 | /* |
| 369 | * We are in the child. Make sure all other file |
| 370 | * descriptors are closed, in case we are called with |
| 371 | * more opened file descriptors than the standard ones. |
| 372 | */ |
| 373 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { |
| 374 | (void) close(i); |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Starting from here, we can create threads. This needs to be after |
| 380 | * lttng_daemonize due to RCU. |
| 381 | */ |
| 382 | |
| 383 | health_consumerd = health_app_create(NR_HEALTH_CONSUMERD_TYPES); |
| 384 | if (!health_consumerd) { |
| 385 | retval = -1; |
| 386 | goto exit_health_consumerd_cleanup; |
| 387 | } |
| 388 | |
| 389 | if (*command_sock_path == '\0') { |
| 390 | switch (opt_type) { |
| 391 | case LTTNG_CONSUMER_KERNEL: |
| 392 | ret = snprintf(command_sock_path, |
| 393 | PATH_MAX, |
| 394 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, |
| 395 | DEFAULT_LTTNG_RUNDIR); |
| 396 | if (ret < 0) { |
| 397 | retval = -1; |
| 398 | goto exit_init_data; |
| 399 | } |
| 400 | break; |
| 401 | case LTTNG_CONSUMER64_UST: |
| 402 | ret = snprintf(command_sock_path, |
| 403 | PATH_MAX, |
| 404 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, |
| 405 | DEFAULT_LTTNG_RUNDIR); |
| 406 | if (ret < 0) { |
| 407 | retval = -1; |
| 408 | goto exit_init_data; |
| 409 | } |
| 410 | break; |
| 411 | case LTTNG_CONSUMER32_UST: |
| 412 | ret = snprintf(command_sock_path, |
| 413 | PATH_MAX, |
| 414 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, |
| 415 | DEFAULT_LTTNG_RUNDIR); |
| 416 | if (ret < 0) { |
| 417 | retval = -1; |
| 418 | goto exit_init_data; |
| 419 | } |
| 420 | break; |
| 421 | default: |
| 422 | ERR("Unknown consumerd type"); |
| 423 | retval = -1; |
| 424 | goto exit_init_data; |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /* Init */ |
| 429 | if (lttng_consumer_init()) { |
| 430 | retval = -1; |
| 431 | goto exit_init_data; |
| 432 | } |
| 433 | |
| 434 | /* Initialize communication library */ |
| 435 | lttcomm_init(); |
| 436 | /* Initialize TCP timeout values */ |
| 437 | lttcomm_inet_init(); |
| 438 | |
| 439 | if (!getuid()) { |
| 440 | /* Set limit for open files */ |
| 441 | set_ulimit(); |
| 442 | } |
| 443 | |
| 444 | /* create the consumer instance with and assign the callbacks */ |
| 445 | the_consumer_context = lttng_consumer_create(opt_type, |
| 446 | lttng_consumer_read_subbuffer, |
| 447 | nullptr, |
| 448 | lttng_consumer_on_recv_stream, |
| 449 | nullptr); |
| 450 | if (!the_consumer_context) { |
| 451 | retval = -1; |
| 452 | goto exit_init_data; |
| 453 | } |
| 454 | |
| 455 | lttng_consumer_set_command_sock_path(the_consumer_context, command_sock_path); |
| 456 | if (*error_sock_path == '\0') { |
| 457 | switch (opt_type) { |
| 458 | case LTTNG_CONSUMER_KERNEL: |
| 459 | ret = snprintf(error_sock_path, |
| 460 | PATH_MAX, |
| 461 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
| 462 | DEFAULT_LTTNG_RUNDIR); |
| 463 | if (ret < 0) { |
| 464 | retval = -1; |
| 465 | goto exit_init_data; |
| 466 | } |
| 467 | break; |
| 468 | case LTTNG_CONSUMER64_UST: |
| 469 | ret = snprintf(error_sock_path, |
| 470 | PATH_MAX, |
| 471 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
| 472 | DEFAULT_LTTNG_RUNDIR); |
| 473 | if (ret < 0) { |
| 474 | retval = -1; |
| 475 | goto exit_init_data; |
| 476 | } |
| 477 | break; |
| 478 | case LTTNG_CONSUMER32_UST: |
| 479 | ret = snprintf(error_sock_path, |
| 480 | PATH_MAX, |
| 481 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
| 482 | DEFAULT_LTTNG_RUNDIR); |
| 483 | if (ret < 0) { |
| 484 | retval = -1; |
| 485 | goto exit_init_data; |
| 486 | } |
| 487 | break; |
| 488 | default: |
| 489 | ERR("Unknown consumerd type"); |
| 490 | retval = -1; |
| 491 | goto exit_init_data; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | /* Connect to the socket created by lttng-sessiond to report errors */ |
| 496 | DBG("Connecting to error socket %s", error_sock_path); |
| 497 | ret = lttcomm_connect_unix_sock(error_sock_path); |
| 498 | /* |
| 499 | * Not a fatal error, but all communication with lttng-sessiond will |
| 500 | * fail. |
| 501 | */ |
| 502 | if (ret < 0) { |
| 503 | WARN("Cannot connect to error socket (is lttng-sessiond started?)"); |
| 504 | } |
| 505 | lttng_consumer_set_error_sock(the_consumer_context, ret); |
| 506 | |
| 507 | /* |
| 508 | * Block RT signals used for UST periodical metadata flush and the live |
| 509 | * timer in main, and create a dedicated thread to handle these signals. |
| 510 | */ |
| 511 | if (consumer_signal_init()) { |
| 512 | retval = -1; |
| 513 | goto exit_init_data; |
| 514 | } |
| 515 | |
| 516 | the_consumer_context->type = opt_type; |
| 517 | |
| 518 | if (utils_create_pipe(health_quit_pipe)) { |
| 519 | retval = -1; |
| 520 | goto exit_health_pipe; |
| 521 | } |
| 522 | |
| 523 | /* Create thread to manage the client socket */ |
| 524 | ret = pthread_create(&health_thread, |
| 525 | default_pthread_attr(), |
| 526 | thread_manage_health_consumerd, |
| 527 | (void *) nullptr); |
| 528 | if (ret) { |
| 529 | errno = ret; |
| 530 | PERROR("pthread_create health"); |
| 531 | retval = -1; |
| 532 | goto exit_health_thread; |
| 533 | } |
| 534 | |
| 535 | /* |
| 536 | * Wait for health thread to be initialized before letting the |
| 537 | * sessiond thread reply to the sessiond that we are ready. |
| 538 | */ |
| 539 | while (uatomic_read(<tng_consumer_ready)) { |
| 540 | usleep(100000); |
| 541 | } |
| 542 | cmm_smp_mb(); /* Read ready before following operations */ |
| 543 | |
| 544 | /* |
| 545 | * Create the thread to manage the UST metadata periodic timer and |
| 546 | * live timer. |
| 547 | */ |
| 548 | ret = pthread_create(&metadata_timer_thread, |
| 549 | nullptr, |
| 550 | consumer_timer_thread, |
| 551 | (void *) the_consumer_context); |
| 552 | if (ret) { |
| 553 | errno = ret; |
| 554 | PERROR("pthread_create"); |
| 555 | retval = -1; |
| 556 | goto exit_metadata_timer_thread; |
| 557 | } |
| 558 | metadata_timer_thread_online = true; |
| 559 | |
| 560 | /* Create thread to manage channels */ |
| 561 | ret = pthread_create(&channel_thread, |
| 562 | default_pthread_attr(), |
| 563 | consumer_thread_channel_poll, |
| 564 | (void *) the_consumer_context); |
| 565 | if (ret) { |
| 566 | errno = ret; |
| 567 | PERROR("pthread_create"); |
| 568 | retval = -1; |
| 569 | goto exit_channel_thread; |
| 570 | } |
| 571 | |
| 572 | /* Create thread to manage the polling/writing of trace metadata */ |
| 573 | ret = pthread_create(&metadata_thread, |
| 574 | default_pthread_attr(), |
| 575 | consumer_thread_metadata_poll, |
| 576 | (void *) the_consumer_context); |
| 577 | if (ret) { |
| 578 | errno = ret; |
| 579 | PERROR("pthread_create"); |
| 580 | retval = -1; |
| 581 | goto exit_metadata_thread; |
| 582 | } |
| 583 | |
| 584 | /* Create thread to manage the polling/writing of trace data */ |
| 585 | ret = pthread_create(&data_thread, |
| 586 | default_pthread_attr(), |
| 587 | consumer_thread_data_poll, |
| 588 | (void *) the_consumer_context); |
| 589 | if (ret) { |
| 590 | errno = ret; |
| 591 | PERROR("pthread_create"); |
| 592 | retval = -1; |
| 593 | goto exit_data_thread; |
| 594 | } |
| 595 | |
| 596 | /* Create the thread to manage the reception of fds */ |
| 597 | ret = pthread_create(&sessiond_thread, |
| 598 | default_pthread_attr(), |
| 599 | consumer_thread_sessiond_poll, |
| 600 | (void *) the_consumer_context); |
| 601 | if (ret) { |
| 602 | errno = ret; |
| 603 | PERROR("pthread_create"); |
| 604 | retval = -1; |
| 605 | goto exit_sessiond_thread; |
| 606 | } |
| 607 | |
| 608 | /* |
| 609 | * This is where we start awaiting program completion (e.g. through |
| 610 | * signal that asks threads to teardown. |
| 611 | */ |
| 612 | |
| 613 | ret = pthread_join(sessiond_thread, &status); |
| 614 | if (ret) { |
| 615 | errno = ret; |
| 616 | PERROR("pthread_join sessiond_thread"); |
| 617 | retval = -1; |
| 618 | } |
| 619 | exit_sessiond_thread: |
| 620 | |
| 621 | ret = pthread_join(data_thread, &status); |
| 622 | if (ret) { |
| 623 | errno = ret; |
| 624 | PERROR("pthread_join data_thread"); |
| 625 | retval = -1; |
| 626 | } |
| 627 | exit_data_thread: |
| 628 | |
| 629 | ret = pthread_join(metadata_thread, &status); |
| 630 | if (ret) { |
| 631 | errno = ret; |
| 632 | PERROR("pthread_join metadata_thread"); |
| 633 | retval = -1; |
| 634 | } |
| 635 | exit_metadata_thread: |
| 636 | |
| 637 | ret = pthread_join(channel_thread, &status); |
| 638 | if (ret) { |
| 639 | errno = ret; |
| 640 | PERROR("pthread_join channel_thread"); |
| 641 | retval = -1; |
| 642 | } |
| 643 | exit_channel_thread: |
| 644 | |
| 645 | exit_metadata_timer_thread: |
| 646 | |
| 647 | ret = pthread_join(health_thread, &status); |
| 648 | if (ret) { |
| 649 | errno = ret; |
| 650 | PERROR("pthread_join health_thread"); |
| 651 | retval = -1; |
| 652 | } |
| 653 | exit_health_thread: |
| 654 | |
| 655 | utils_close_pipe(health_quit_pipe); |
| 656 | exit_health_pipe: |
| 657 | |
| 658 | exit_init_data: |
| 659 | /* |
| 660 | * Wait for all pending call_rcu work to complete before tearing |
| 661 | * down data structures. call_rcu worker may be trying to |
| 662 | * perform lookups in those structures. |
| 663 | */ |
| 664 | rcu_barrier(); |
| 665 | lttng_consumer_cleanup(); |
| 666 | /* |
| 667 | * Tearing down the metadata timer thread in a |
| 668 | * non-fully-symmetric fashion compared to its creation in case |
| 669 | * lttng_consumer_cleanup() ends up tearing down timers (which |
| 670 | * requires the timer thread to be alive). |
| 671 | */ |
| 672 | if (metadata_timer_thread_online) { |
| 673 | /* |
| 674 | * Ensure the metadata timer thread exits only after all other |
| 675 | * threads are gone, because it is required to perform timer |
| 676 | * teardown synchronization. |
| 677 | */ |
| 678 | kill(getpid(), LTTNG_CONSUMER_SIG_EXIT); |
| 679 | ret = pthread_join(metadata_timer_thread, &status); |
| 680 | if (ret) { |
| 681 | errno = ret; |
| 682 | PERROR("pthread_join metadata_timer_thread"); |
| 683 | retval = -1; |
| 684 | } |
| 685 | ret = consumer_timer_thread_get_channel_monitor_pipe(); |
| 686 | if (ret >= 0) { |
| 687 | ret = close(ret); |
| 688 | if (ret) { |
| 689 | PERROR("close channel monitor pipe"); |
| 690 | } |
| 691 | } |
| 692 | metadata_timer_thread_online = false; |
| 693 | } |
| 694 | tmp_ctx = the_consumer_context; |
| 695 | the_consumer_context = nullptr; |
| 696 | cmm_barrier(); /* Clear ctx for signal handler. */ |
| 697 | lttng_consumer_destroy(tmp_ctx); |
| 698 | |
| 699 | if (health_consumerd) { |
| 700 | health_app_destroy(health_consumerd); |
| 701 | } |
| 702 | /* Ensure all prior call_rcu are done. */ |
| 703 | rcu_barrier(); |
| 704 | |
| 705 | run_as_destroy_worker(); |
| 706 | |
| 707 | exit_health_consumerd_cleanup: |
| 708 | exit_options: |
| 709 | exit_set_signal_handler: |
| 710 | |
| 711 | rcu_unregister_thread(); |
| 712 | |
| 713 | if (!retval) { |
| 714 | exit(EXIT_SUCCESS); |
| 715 | } else { |
| 716 | exit(EXIT_FAILURE); |
| 717 | } |
| 718 | } |