*/
#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <fcntl.h>
#include <getopt.h>
#include <grp.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 <assert.h>
#include <config.h>
#include <urcu/compiler.h>
+#include <ulimit.h>
#include <common/defaults.h>
#include <common/common.h>
-#include <common/kernel-consumer/kernel-consumer.h>
-#include <common/kernel-ctl/kernel-ctl.h>
+#include <common/consumer.h>
+#include <common/consumer-timer.h>
+#include <common/compat/poll.h>
#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/ust-consumer/ust-consumer.h>
+#include <common/utils.h>
#include "lttng-consumerd.h"
+#include "health-consumerd.h"
/* TODO : support UST (all direct kernel-ctl accesses). */
-/* the two threads (receive fd and poll) */
-static pthread_t threads[2];
+/* 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 */
/* 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
*/
return;
}
+ /*
+ * Ignore SIGPIPE because it should not stop the consumer whenever a
+ * SIGPIPE is catched through a FD operation.
+ */
+ if (sig == SIGPIPE) {
+ return;
+ }
+
lttng_consumer_should_exit(ctx);
}
fprintf(fp, "Usage: %s OPTIONS\n\nOptions:\n", progname);
fprintf(fp, " -h, --help "
"Display this usage.\n");
- fprintf(fp, " -c, --consumerd-cmd-sock PATH "
+ fprintf(fp, " -c, --consumerd-cmd-sock PATH "
"Specify path for the command socket\n");
- fprintf(fp, " -e, --consumerd-err-sock PATH "
+ fprintf(fp, " -e, --consumerd-err-sock PATH "
"Specify path for the error socket\n");
fprintf(fp, " -d, --daemonize "
"Start as a daemon.\n");
"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 "
{ "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' },
while (1) {
int option_index = 0;
- c = getopt_long(argc, argv, "dhqvVku" "c:e:", long_options, &option_index);
+ c = getopt_long(argc, argv, "dhqvVku" "c:e:g:", long_options, &option_index);
if (c == -1) {
break;
}
case 'd':
opt_daemon = 1;
break;
+ case 'g':
+ tracing_group_name = optarg;
+ break;
case 'h':
usage(stdout);
exit(EXIT_SUCCESS);
}
}
+/*
+ * 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 i;
int ret = 0;
void *status;
/* 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");
+ PERROR("daemon");
goto error;
}
+ /*
+ * 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);
+ }
}
- if (strlen(command_sock_path) == 0) {
+ /* Set up max poll set size */
+ lttng_poll_set_max_size();
+
+ if (*command_sock_path == '\0') {
switch (opt_type) {
case LTTNG_CONSUMER_KERNEL:
snprintf(command_sock_path, PATH_MAX, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
}
/* Init */
- lttng_consumer_init();
+ if (lttng_consumer_init() < 0) {
+ goto error;
+ }
+
+ /* Init socket timeouts */
+ lttcomm_init();
+ lttcomm_inet_init();
+
+ if (!getuid()) {
+ /* Set limit for open files */
+ set_ulimit();
+ }
+
+ health_consumerd = health_app_create(NR_HEALTH_CONSUMERD_TYPES);
+ if (!health_consumerd) {
+ goto error;
+ }
/* create the consumer instance with and assign the callbacks */
ctx = lttng_consumer_create(opt_type, lttng_consumer_read_subbuffer,
}
lttng_consumer_set_command_sock_path(ctx, command_sock_path);
- if (strlen(error_sock_path) == 0) {
+ if (*error_sock_path == '\0') {
switch (opt_type) {
case LTTNG_CONSUMER_KERNEL:
snprintf(error_sock_path, PATH_MAX, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
}
lttng_consumer_set_error_sock(ctx, ret);
- /* Create the thread to manage the receive of fd */
- ret = pthread_create(&threads[0], NULL, lttng_consumer_thread_receive_fds,
+ /*
+ * Block RT signals used for UST periodical metadata flush and the live
+ * timer in main, and create a dedicated thread to handle these signals.
+ */
+ consumer_signal_init();
+
+ ctx->type = opt_type;
+
+ ret = utils_create_pipe(health_quit_pipe);
+ if (ret < 0) {
+ goto error_health_pipe;
+ }
+
+ /* Create thread to manage the client socket */
+ ret = pthread_create(&health_thread, NULL,
+ thread_manage_health, (void *) NULL);
+ if (ret != 0) {
+ PERROR("pthread_create health");
+ goto health_error;
+ }
+
+ /*
+ * 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, NULL, consumer_thread_channel_poll,
(void *) ctx);
if (ret != 0) {
perror("pthread_create");
- goto error;
+ goto channel_error;
}
- /* Create thread to manage the polling/writing of traces */
- ret = pthread_create(&threads[1], NULL, lttng_consumer_thread_poll_fds,
+ /* Create thread to manage the polling/writing of trace metadata */
+ ret = pthread_create(&metadata_thread, NULL, consumer_thread_metadata_poll,
(void *) ctx);
if (ret != 0) {
perror("pthread_create");
+ goto metadata_error;
+ }
+
+ /* Create thread to manage the polling/writing of trace data */
+ ret = pthread_create(&data_thread, NULL, consumer_thread_data_poll,
+ (void *) ctx);
+ if (ret != 0) {
+ perror("pthread_create");
+ goto data_error;
+ }
+
+ /* Create the thread to manage the receive of fd */
+ ret = pthread_create(&sessiond_thread, NULL, consumer_thread_sessiond_poll,
+ (void *) ctx);
+ if (ret != 0) {
+ perror("pthread_create");
+ goto sessiond_error;
+ }
+
+ /*
+ * Create the thread to manage the UST metadata periodic timer and
+ * live timer.
+ */
+ ret = pthread_create(&metadata_timer_thread, NULL,
+ consumer_timer_thread, (void *) ctx);
+ if (ret != 0) {
+ perror("pthread_create");
+ goto metadata_timer_error;
+ }
+
+ ret = pthread_detach(metadata_timer_thread);
+ if (ret) {
+ errno = ret;
+ perror("pthread_detach");
+ }
+
+metadata_timer_error:
+ ret = pthread_join(sessiond_thread, &status);
+ if (ret != 0) {
+ perror("pthread_join");
goto error;
}
- for (i = 0; i < 2; i++) {
- ret = pthread_join(threads[i], &status);
- if (ret != 0) {
- perror("pthread_join");
- goto error;
- }
+sessiond_error:
+ ret = pthread_join(data_thread, &status);
+ if (ret != 0) {
+ perror("pthread_join");
+ goto error;
+ }
+
+data_error:
+ ret = pthread_join(metadata_thread, &status);
+ if (ret != 0) {
+ perror("pthread_join");
+ goto error;
+ }
+
+metadata_error:
+ ret = pthread_join(channel_thread, &status);
+ if (ret != 0) {
+ perror("pthread_join");
+ goto error;
+ }
+
+channel_error:
+ ret = pthread_join(health_thread, &status);
+ if (ret != 0) {
+ PERROR("pthread_join health thread");
+ goto error; /* join error, exit without cleanup */
+ }
+
+health_error:
+ utils_close_pipe(health_quit_pipe);
+
+error_health_pipe:
+ if (!ret) {
+ ret = EXIT_SUCCESS;
+ goto end;
}
- ret = EXIT_SUCCESS;
- lttng_consumer_send_error(ctx, CONSUMERD_EXIT_SUCCESS);
- goto end;
error:
ret = EXIT_FAILURE;
- lttng_consumer_send_error(ctx, CONSUMERD_EXIT_FAILURE);
end:
lttng_consumer_destroy(ctx);
lttng_consumer_cleanup();
+ if (health_consumerd) {
+ health_app_destroy(health_consumerd);
+ }
return ret;
}
projects / lttng-tools.git / blobdiff