+++ /dev/null
-/*
- * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#define _LGPL_SOURCE
-#include <fcntl.h>
-#include <getopt.h>
-#include <grp.h>
-#include <limits.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ipc.h>
-#include <sys/resource.h>
-#include <sys/shm.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <urcu/list.h>
-#include <poll.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <assert.h>
-#include <urcu/compiler.h>
-#include <ulimit.h>
-
-#include <common/defaults.h>
-#include <common/common.h>
-#include <common/consumer/consumer.h>
-#include <common/consumer/consumer-timer.h>
-#include <common/compat/poll.h>
-#include <common/compat/getenv.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/utils.h>
-
-#include "lttng-consumerd.h"
-#include "health-consumerd.h"
-
-/* threads (channel handling, poll, metadata, sessiond) */
-
-static pthread_t channel_thread, data_thread, metadata_thread,
- sessiond_thread, metadata_timer_thread, health_thread;
-
-/* to count the number of times the user pressed ctrl+c */
-static int sigintcount = 0;
-
-/* Argument variables */
-int lttng_opt_quiet; /* not static in error.h */
-int lttng_opt_verbose; /* not static in error.h */
-int lttng_opt_mi; /* not static in error.h */
-
-static int opt_daemon;
-static const char *progname;
-static char command_sock_path[PATH_MAX]; /* Global command socket path */
-static char error_sock_path[PATH_MAX]; /* Global error path */
-static enum lttng_consumer_type opt_type = LTTNG_CONSUMER_KERNEL;
-
-/* the liblttngconsumerd context */
-static struct lttng_consumer_local_data *ctx;
-
-/* Consumerd health monitoring */
-struct health_app *health_consumerd;
-
-const char *tracing_group_name = DEFAULT_TRACING_GROUP;
-
-int lttng_consumer_ready = NR_LTTNG_CONSUMER_READY;
-
-enum lttng_consumer_type lttng_consumer_get_type(void)
-{
- if (!ctx) {
- return LTTNG_CONSUMER_UNKNOWN;
- }
- return ctx->type;
-}
-
-/*
- * Signal handler for the daemon
- */
-static void sighandler(int sig)
-{
- if (sig == SIGINT && sigintcount++ == 0) {
- DBG("ignoring first SIGINT");
- return;
- }
-
- /*
- * Ignore SIGPIPE because it should not stop the consumer whenever a
- * SIGPIPE is caught through a FD operation.
- */
- if (sig == SIGPIPE) {
- return;
- }
-
- if (ctx) {
- lttng_consumer_should_exit(ctx);
- }
-}
-
-/*
- * Setup signal handler for :
- * SIGINT, SIGTERM, SIGPIPE
- */
-static int set_signal_handler(void)
-{
- int ret = 0;
- struct sigaction sa;
- sigset_t sigset;
-
- if ((ret = sigemptyset(&sigset)) < 0) {
- PERROR("sigemptyset");
- return ret;
- }
-
- sa.sa_handler = sighandler;
- sa.sa_mask = sigset;
- sa.sa_flags = 0;
- if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
- PERROR("sigaction");
- return ret;
- }
-
- return ret;
-}
-
-/*
- * Usage function on stream file.
- */
-static void usage(FILE *fp)
-{
- fprintf(fp, "Usage: %s OPTIONS\n\nOptions:\n", progname);
- fprintf(fp, " -h, --help "
- "Display this usage.\n");
- fprintf(fp, " -c, --consumerd-cmd-sock PATH "
- "Specify path for the command socket\n");
- fprintf(fp, " -e, --consumerd-err-sock PATH "
- "Specify path for the error socket\n");
- fprintf(fp, " -d, --daemonize "
- "Start as a daemon.\n");
- fprintf(fp, " -q, --quiet "
- "No output at all.\n");
- fprintf(fp, " -v, --verbose "
- "Verbose mode. Activate DBG() macro.\n");
- fprintf(fp, " -V, --version "
- "Show version number.\n");
- fprintf(fp, " -g, --group NAME "
- "Specify the tracing group name. (default: tracing)\n");
- fprintf(fp, " -k, --kernel "
- "Consumer kernel buffers (default).\n");
- fprintf(fp, " -u, --ust "
- "Consumer UST buffers.%s\n",
-#ifdef HAVE_LIBLTTNG_UST_CTL
- ""
-#else
- " (support not compiled in)"
-#endif
- );
-}
-
-/*
- * daemon argument parsing
- */
-static int parse_args(int argc, char **argv)
-{
- int c, ret = 0;
-
- static struct option long_options[] = {
- { "consumerd-cmd-sock", 1, 0, 'c' },
- { "consumerd-err-sock", 1, 0, 'e' },
- { "daemonize", 0, 0, 'd' },
- { "group", 1, 0, 'g' },
- { "help", 0, 0, 'h' },
- { "quiet", 0, 0, 'q' },
- { "verbose", 0, 0, 'v' },
- { "version", 0, 0, 'V' },
- { "kernel", 0, 0, 'k' },
-#ifdef HAVE_LIBLTTNG_UST_CTL
- { "ust", 0, 0, 'u' },
-#endif
- { NULL, 0, 0, 0 }
- };
-
- while (1) {
- int option_index = 0;
- c = getopt_long(argc, argv, "dhqvVku" "c:e:g:",
- long_options, &option_index);
- if (c == -1) {
- break;
- }
-
- switch (c) {
- case 0:
- fprintf(stderr, "option %s",
- long_options[option_index].name);
- if (optarg) {
- fprintf(stderr, " with arg %s\n", optarg);
- ret = -1;
- goto end;
- }
- break;
- case 'c':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-c, --consumerd-cmd-sock");
- } else {
- snprintf(command_sock_path, PATH_MAX, "%s", optarg);
- }
- break;
- case 'e':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-e, --consumerd-err-sock");
- } else {
- snprintf(error_sock_path, PATH_MAX, "%s", optarg);
- }
- break;
- case 'd':
- opt_daemon = 1;
- break;
- case 'g':
- if (lttng_is_setuid_setgid()) {
- WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
- "-g, --group");
- } else {
- tracing_group_name = optarg;
- }
- break;
- case 'h':
- usage(stdout);
- exit(EXIT_SUCCESS);
- case 'q':
- lttng_opt_quiet = 1;
- break;
- case 'v':
- lttng_opt_verbose = 1;
- break;
- case 'V':
- fprintf(stdout, "%s\n", VERSION);
- exit(EXIT_SUCCESS);
- case 'k':
- opt_type = LTTNG_CONSUMER_KERNEL;
- break;
-#ifdef HAVE_LIBLTTNG_UST_CTL
- case 'u':
-# if (CAA_BITS_PER_LONG == 64)
- opt_type = LTTNG_CONSUMER64_UST;
-# elif (CAA_BITS_PER_LONG == 32)
- opt_type = LTTNG_CONSUMER32_UST;
-# else
-# error "Unknown bitness"
-# endif
- break;
-#endif
- default:
- usage(stderr);
- ret = -1;
- goto end;
- }
- }
-end:
- return ret;
-}
-
-/*
- * Set open files limit to unlimited. This daemon can open a large number of
- * file descriptors in order to consumer multiple kernel traces.
- */
-static void set_ulimit(void)
-{
- int ret;
- struct rlimit lim;
-
- /* The kernel does not allowed an infinite limit for open files */
- lim.rlim_cur = 65535;
- lim.rlim_max = 65535;
-
- ret = setrlimit(RLIMIT_NOFILE, &lim);
- if (ret < 0) {
- PERROR("failed to set open files limit");
- }
-}
-
-/*
- * main
- */
-int main(int argc, char **argv)
-{
- int ret = 0, retval = 0;
- void *status;
- struct lttng_consumer_local_data *tmp_ctx;
-
- if (set_signal_handler()) {
- retval = -1;
- goto exit_set_signal_handler;
- }
-
- /* Parse arguments */
- progname = argv[0];
- if (parse_args(argc, argv)) {
- retval = -1;
- goto exit_options;
- }
-
- /* Daemonize */
- if (opt_daemon) {
- int i;
-
- /*
- * fork
- * child: setsid, close FD 0, 1, 2, chdir /
- * parent: exit (if fork is successful)
- */
- ret = daemon(0, 0);
- if (ret < 0) {
- PERROR("daemon");
- retval = -1;
- goto exit_options;
- }
- /*
- * We are in the child. Make sure all other file
- * descriptors are closed, in case we are called with
- * more opened file descriptors than the standard ones.
- */
- for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) {
- (void) close(i);
- }
- }
-
- /*
- * Starting from here, we can create threads. This needs to be after
- * lttng_daemonize due to RCU.
- */
-
- health_consumerd = health_app_create(NR_HEALTH_CONSUMERD_TYPES);
- if (!health_consumerd) {
- retval = -1;
- goto exit_health_consumerd_cleanup;
- }
-
- if (*command_sock_path == '\0') {
- switch (opt_type) {
- case LTTNG_CONSUMER_KERNEL:
- ret = snprintf(command_sock_path, PATH_MAX,
- DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- case LTTNG_CONSUMER64_UST:
- ret = snprintf(command_sock_path, PATH_MAX,
- DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- case LTTNG_CONSUMER32_UST:
- ret = snprintf(command_sock_path, PATH_MAX,
- DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- default:
- ERR("Unknown consumerd type");
- retval = -1;
- goto exit_init_data;
- }
- }
-
- /* Init */
- if (lttng_consumer_init()) {
- retval = -1;
- goto exit_init_data;
- }
-
- /* Initialize communication library */
- lttcomm_init();
- /* Initialize TCP timeout values */
- lttcomm_inet_init();
-
- if (!getuid()) {
- /* Set limit for open files */
- set_ulimit();
- }
-
- if (run_as_create_worker(argv[0]) < 0) {
- goto exit_init_data;
- }
-
- /* create the consumer instance with and assign the callbacks */
- ctx = lttng_consumer_create(opt_type, lttng_consumer_read_subbuffer,
- NULL, lttng_consumer_on_recv_stream, NULL);
- if (!ctx) {
- retval = -1;
- goto exit_init_data;
- }
-
- lttng_consumer_set_command_sock_path(ctx, command_sock_path);
- if (*error_sock_path == '\0') {
- switch (opt_type) {
- case LTTNG_CONSUMER_KERNEL:
- ret = snprintf(error_sock_path, PATH_MAX,
- DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- case LTTNG_CONSUMER64_UST:
- ret = snprintf(error_sock_path, PATH_MAX,
- DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- case LTTNG_CONSUMER32_UST:
- ret = snprintf(error_sock_path, PATH_MAX,
- DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
- DEFAULT_LTTNG_RUNDIR);
- if (ret < 0) {
- retval = -1;
- goto exit_init_data;
- }
- break;
- default:
- ERR("Unknown consumerd type");
- retval = -1;
- goto exit_init_data;
- }
- }
-
- /* Connect to the socket created by lttng-sessiond to report errors */
- DBG("Connecting to error socket %s", error_sock_path);
- ret = lttcomm_connect_unix_sock(error_sock_path);
- /*
- * Not a fatal error, but all communication with lttng-sessiond will
- * fail.
- */
- if (ret < 0) {
- WARN("Cannot connect to error socket (is lttng-sessiond started?)");
- }
- lttng_consumer_set_error_sock(ctx, ret);
-
- /*
- * Block RT signals used for UST periodical metadata flush and the live
- * timer in main, and create a dedicated thread to handle these signals.
- */
- if (consumer_signal_init()) {
- retval = -1;
- goto exit_init_data;
- }
-
- ctx->type = opt_type;
-
- if (utils_create_pipe(health_quit_pipe)) {
- retval = -1;
- goto exit_health_pipe;
- }
-
- /* Create thread to manage the client socket */
- ret = pthread_create(&health_thread, default_pthread_attr(),
- thread_manage_health, (void *) NULL);
- if (ret) {
- errno = ret;
- PERROR("pthread_create health");
- retval = -1;
- goto exit_health_thread;
- }
-
- /*
- * Wait for health thread to be initialized before letting the
- * sessiond thread reply to the sessiond that we are ready.
- */
- while (uatomic_read(<tng_consumer_ready)) {
- usleep(100000);
- }
- cmm_smp_mb(); /* Read ready before following operations */
-
- /* Create thread to manage channels */
- ret = pthread_create(&channel_thread, default_pthread_attr(),
- consumer_thread_channel_poll,
- (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_channel_thread;
- }
-
- /* Create thread to manage the polling/writing of trace metadata */
- ret = pthread_create(&metadata_thread, default_pthread_attr(),
- consumer_thread_metadata_poll,
- (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_metadata_thread;
- }
-
- /* Create thread to manage the polling/writing of trace data */
- ret = pthread_create(&data_thread, default_pthread_attr(),
- consumer_thread_data_poll, (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_data_thread;
- }
-
- /* Create the thread to manage the receive of fd */
- ret = pthread_create(&sessiond_thread, default_pthread_attr(),
- consumer_thread_sessiond_poll,
- (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_sessiond_thread;
- }
-
- /*
- * Create the thread to manage the UST metadata periodic timer and
- * live timer.
- */
- ret = pthread_create(&metadata_timer_thread, default_pthread_attr(),
- consumer_timer_thread, (void *) ctx);
- if (ret) {
- errno = ret;
- PERROR("pthread_create");
- retval = -1;
- goto exit_metadata_timer_thread;
- }
-
- ret = pthread_detach(metadata_timer_thread);
- if (ret) {
- errno = ret;
- PERROR("pthread_detach");
- retval = -1;
- goto exit_metadata_timer_detach;
- }
-
- /*
- * This is where we start awaiting program completion (e.g. through
- * signal that asks threads to teardown.
- */
-
-exit_metadata_timer_detach:
-exit_metadata_timer_thread:
- ret = pthread_join(sessiond_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join sessiond_thread");
- retval = -1;
- }
-exit_sessiond_thread:
-
- ret = pthread_join(data_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join data_thread");
- retval = -1;
- }
-exit_data_thread:
-
- ret = pthread_join(metadata_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join metadata_thread");
- retval = -1;
- }
-exit_metadata_thread:
-
- ret = pthread_join(channel_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join channel_thread");
- retval = -1;
- }
-exit_channel_thread:
-
- ret = pthread_join(health_thread, &status);
- if (ret) {
- errno = ret;
- PERROR("pthread_join health_thread");
- retval = -1;
- }
-exit_health_thread:
-
- utils_close_pipe(health_quit_pipe);
-exit_health_pipe:
-
-exit_init_data:
- tmp_ctx = ctx;
- ctx = NULL;
- cmm_barrier(); /* Clear ctx for signal handler. */
- lttng_consumer_destroy(tmp_ctx);
- lttng_consumer_cleanup();
-
- if (health_consumerd) {
- health_app_destroy(health_consumerd);
- }
- /* Ensure all prior call_rcu are done. */
- rcu_barrier();
-
- run_as_destroy_worker();
-
-exit_health_consumerd_cleanup:
-exit_options:
-exit_set_signal_handler:
-
- if (!retval) {
- exit(EXIT_SUCCESS);
- } else {
- exit(EXIT_FAILURE);
- }
-}
projects / lttng-tools.git / blobdiff