/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@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.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * 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 "consumer.h"
#include "context.h"
#include "event.h"
+#include "event-notifier-error-accounting.h"
#include "kernel.h"
#include "kernel-consumer.h"
-#include "modprobe.h"
-#include "shm.h"
-#include "ust-ctl.h"
+#include "lttng-ust-ctl.h"
#include "ust-consumer.h"
#include "utils.h"
#include "fd-limit.h"
#include "notification-thread.h"
#include "notification-thread-commands.h"
#include "rotation-thread.h"
-#include "lttng-syscall.h"
#include "agent.h"
#include "ht-cleanup.h"
#include "sessiond-config.h"
#include "register.h"
#include "manage-apps.h"
#include "manage-kernel.h"
+#include "modprobe.h"
static const char *help_msg =
#ifdef LTTNG_EMBED_HELP
#endif
;
+#define EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX 65535
+
const char *progname;
static int lockfile_fd = -1;
+static int opt_print_version;
/* Set to 1 when a SIGUSR1 signal is received. */
static int recv_child_signal;
{ "load", required_argument, 0, 'l' },
{ "kmod-probes", required_argument, 0, '\0' },
{ "extra-kmod-probes", required_argument, 0, '\0' },
+ { "event-notifier-error-number-of-bucket", required_argument, 0, '\0' },
{ NULL, 0, 0, 0 }
};
*/
static struct ust_cmd_queue ust_cmd_queue;
-static const char *module_proc_lttng = "/proc/lttng";
-
/*
* Section name to look for in the daemon configuration file.
*/
{
int ret;
- if (kconsumer_data.err_sock >= 0) {
- ret = close(kconsumer_data.err_sock);
+ if (the_kconsumer_data.err_sock >= 0) {
+ ret = close(the_kconsumer_data.err_sock);
if (ret < 0) {
PERROR("kernel consumer err_sock close");
}
}
- if (ustconsumer32_data.err_sock >= 0) {
- ret = close(ustconsumer32_data.err_sock);
+ if (the_ustconsumer32_data.err_sock >= 0) {
+ ret = close(the_ustconsumer32_data.err_sock);
if (ret < 0) {
PERROR("UST consumerd32 err_sock close");
}
}
- if (ustconsumer64_data.err_sock >= 0) {
- ret = close(ustconsumer64_data.err_sock);
+ if (the_ustconsumer64_data.err_sock >= 0) {
+ ret = close(the_ustconsumer64_data.err_sock);
if (ret < 0) {
PERROR("UST consumerd64 err_sock close");
}
}
- if (kconsumer_data.cmd_sock >= 0) {
- ret = close(kconsumer_data.cmd_sock);
+ if (the_kconsumer_data.cmd_sock >= 0) {
+ ret = close(the_kconsumer_data.cmd_sock);
if (ret < 0) {
PERROR("kernel consumer cmd_sock close");
}
}
- if (ustconsumer32_data.cmd_sock >= 0) {
- ret = close(ustconsumer32_data.cmd_sock);
+ if (the_ustconsumer32_data.cmd_sock >= 0) {
+ ret = close(the_ustconsumer32_data.cmd_sock);
if (ret < 0) {
PERROR("UST consumerd32 cmd_sock close");
}
}
- if (ustconsumer64_data.cmd_sock >= 0) {
- ret = close(ustconsumer64_data.cmd_sock);
+ if (the_ustconsumer64_data.cmd_sock >= 0) {
+ ret = close(the_ustconsumer64_data.cmd_sock);
if (ret < 0) {
PERROR("UST consumerd64 cmd_sock close");
}
}
- if (kconsumer_data.channel_monitor_pipe >= 0) {
- ret = close(kconsumer_data.channel_monitor_pipe);
+ if (the_kconsumer_data.channel_monitor_pipe >= 0) {
+ ret = close(the_kconsumer_data.channel_monitor_pipe);
if (ret < 0) {
PERROR("kernel consumer channel monitor pipe close");
}
}
- if (ustconsumer32_data.channel_monitor_pipe >= 0) {
- ret = close(ustconsumer32_data.channel_monitor_pipe);
+ if (the_ustconsumer32_data.channel_monitor_pipe >= 0) {
+ ret = close(the_ustconsumer32_data.channel_monitor_pipe);
if (ret < 0) {
PERROR("UST consumerd32 channel monitor pipe close");
}
}
- if (ustconsumer64_data.channel_monitor_pipe >= 0) {
- ret = close(ustconsumer64_data.channel_monitor_pipe);
+ if (the_ustconsumer64_data.channel_monitor_pipe >= 0) {
+ ret = close(the_ustconsumer64_data.channel_monitor_pipe);
if (ret < 0) {
PERROR("UST consumerd64 channel monitor pipe close");
}
sessiond_close_quit_pipe();
utils_close_pipe(apps_cmd_pipe);
utils_close_pipe(apps_cmd_notify_pipe);
- utils_close_pipe(kernel_poll_pipe);
+ utils_close_pipe(the_kernel_poll_pipe);
- ret = remove(config.pid_file_path.value);
+ ret = remove(the_config.pid_file_path.value);
if (ret < 0) {
- PERROR("remove pidfile %s", config.pid_file_path.value);
+ PERROR("remove pidfile %s", the_config.pid_file_path.value);
}
DBG("Removing sessiond and consumerd content of directory %s",
- config.rundir.value);
+ the_config.rundir.value);
/* sessiond */
- DBG("Removing %s", config.pid_file_path.value);
- (void) unlink(config.pid_file_path.value);
+ DBG("Removing %s", the_config.pid_file_path.value);
+ (void) unlink(the_config.pid_file_path.value);
- DBG("Removing %s", config.agent_port_file_path.value);
- (void) unlink(config.agent_port_file_path.value);
+ DBG("Removing %s", the_config.agent_port_file_path.value);
+ (void) unlink(the_config.agent_port_file_path.value);
/* kconsumerd */
- DBG("Removing %s", kconsumer_data.err_unix_sock_path);
- (void) unlink(kconsumer_data.err_unix_sock_path);
+ DBG("Removing %s", the_kconsumer_data.err_unix_sock_path);
+ (void) unlink(the_kconsumer_data.err_unix_sock_path);
- DBG("Removing directory %s", config.kconsumerd_path.value);
- (void) rmdir(config.kconsumerd_path.value);
+ DBG("Removing directory %s", the_config.kconsumerd_path.value);
+ (void) rmdir(the_config.kconsumerd_path.value);
/* ust consumerd 32 */
- DBG("Removing %s", config.consumerd32_err_unix_sock_path.value);
- (void) unlink(config.consumerd32_err_unix_sock_path.value);
+ DBG("Removing %s", the_config.consumerd32_err_unix_sock_path.value);
+ (void) unlink(the_config.consumerd32_err_unix_sock_path.value);
- DBG("Removing directory %s", config.consumerd32_path.value);
- (void) rmdir(config.consumerd32_path.value);
+ DBG("Removing directory %s", the_config.consumerd32_path.value);
+ (void) rmdir(the_config.consumerd32_path.value);
/* ust consumerd 64 */
- DBG("Removing %s", config.consumerd64_err_unix_sock_path.value);
- (void) unlink(config.consumerd64_err_unix_sock_path.value);
+ DBG("Removing %s", the_config.consumerd64_err_unix_sock_path.value);
+ (void) unlink(the_config.consumerd64_err_unix_sock_path.value);
- DBG("Removing directory %s", config.consumerd64_path.value);
- (void) rmdir(config.consumerd64_path.value);
+ DBG("Removing directory %s", the_config.consumerd64_path.value);
+ (void) rmdir(the_config.consumerd64_path.value);
pthread_mutex_destroy(&session_list->lock);
- wait_consumer(&kconsumer_data);
- wait_consumer(&ustconsumer64_data);
- wait_consumer(&ustconsumer32_data);
+ DBG("Cleaning up all per-event notifier domain agents");
+ agent_by_event_notifier_domain_ht_destroy();
DBG("Cleaning up all agent apps");
agent_app_ht_clean();
-
DBG("Closing all UST sockets");
ust_app_clean_list();
buffer_reg_destroy_registries();
- if (is_root && !config.no_kernel) {
- DBG2("Closing kernel fd");
- if (kernel_tracer_fd >= 0) {
- ret = close(kernel_tracer_fd);
- if (ret) {
- PERROR("close");
- }
- }
- DBG("Unloading kernel modules");
- modprobe_remove_lttng_all();
- free(syscall_table);
- }
-
close_consumer_sockets();
+ wait_consumer(&the_kconsumer_data);
+ wait_consumer(&the_ustconsumer64_data);
+ wait_consumer(&the_ustconsumer32_data);
+
+ if (is_root && !the_config.no_kernel) {
+ cleanup_kernel_tracer();
+ }
+
/*
* We do NOT rmdir rundir because there are other processes
* using it, for instance lttng-relayd, which can start in
{
DBG("Cleaning up options");
- sessiond_config_fini(&config);
+ sessiond_config_fini(&the_config);
run_as_destroy_worker();
}
-/*
- * Setup necessary data for kernel tracer action.
- */
-static int init_kernel_tracer(void)
-{
- int ret;
-
- /* Modprobe lttng kernel modules */
- ret = modprobe_lttng_control();
- if (ret < 0) {
- goto error;
- }
-
- /* Open debugfs lttng */
- kernel_tracer_fd = open(module_proc_lttng, O_RDWR);
- if (kernel_tracer_fd < 0) {
- DBG("Failed to open %s", module_proc_lttng);
- goto error_open;
- }
-
- /* Validate kernel version */
- ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version,
- &kernel_tracer_abi_version);
- if (ret < 0) {
- goto error_version;
- }
-
- ret = modprobe_lttng_data();
- if (ret < 0) {
- goto error_modules;
- }
-
- ret = kernel_supports_ring_buffer_snapshot_sample_positions(
- kernel_tracer_fd);
- if (ret < 0) {
- goto error_modules;
- }
-
- if (ret < 1) {
- WARN("Kernel tracer does not support buffer monitoring. "
- "The monitoring timer of channels in the kernel domain "
- "will be set to 0 (disabled).");
- }
-
- DBG("Kernel tracer fd %d", kernel_tracer_fd);
- return 0;
-
-error_version:
- modprobe_remove_lttng_control();
- ret = close(kernel_tracer_fd);
- if (ret) {
- PERROR("close");
- }
- kernel_tracer_fd = -1;
- return LTTNG_ERR_KERN_VERSION;
-
-error_modules:
- ret = close(kernel_tracer_fd);
- if (ret) {
- PERROR("close");
- }
-
-error_open:
- modprobe_remove_lttng_control();
-
-error:
- WARN("No kernel tracer available");
- kernel_tracer_fd = -1;
- if (!is_root) {
- return LTTNG_ERR_NEED_ROOT_SESSIOND;
- } else {
- return LTTNG_ERR_KERN_NA;
- }
-}
-
static int string_match(const char *str1, const char *str2)
{
return (str1 && str2) && !strcmp(str1, str2);
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-c, --client-sock");
} else {
- config_string_set(&config.client_unix_sock_path,
+ config_string_set(&the_config.client_unix_sock_path,
strdup(arg));
- if (!config.client_unix_sock_path.value) {
+ if (!the_config.client_unix_sock_path.value) {
ret = -ENOMEM;
PERROR("strdup");
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-a, --apps-sock");
} else {
- config_string_set(&config.apps_unix_sock_path,
+ config_string_set(&the_config.apps_unix_sock_path,
strdup(arg));
- if (!config.apps_unix_sock_path.value) {
+ if (!the_config.apps_unix_sock_path.value) {
ret = -ENOMEM;
PERROR("strdup");
}
}
} else if (string_match(optname, "daemonize") || opt == 'd') {
- config.daemonize = true;
+ the_config.daemonize = true;
} else if (string_match(optname, "background") || opt == 'b') {
- config.background = true;
+ the_config.background = true;
} else if (string_match(optname, "group") || opt == 'g') {
if (!arg || *arg == '\0') {
ret = -EINVAL;
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-g, --group");
} else {
- config_string_set(&config.tracing_group_name,
+ config_string_set(&the_config.tracing_group_name,
strdup(arg));
- if (!config.tracing_group_name.value) {
+ if (!the_config.tracing_group_name.value) {
ret = -ENOMEM;
PERROR("strdup");
}
}
exit(ret ? EXIT_FAILURE : EXIT_SUCCESS);
} else if (string_match(optname, "version") || opt == 'V') {
- fprintf(stdout, "%s\n", VERSION);
- exit(EXIT_SUCCESS);
+ opt_print_version = 1;
} else if (string_match(optname, "sig-parent") || opt == 'S') {
- config.sig_parent = true;
+ the_config.sig_parent = true;
} else if (string_match(optname, "kconsumerd-err-sock")) {
if (!arg || *arg == '\0') {
ret = -EINVAL;
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--kconsumerd-err-sock");
} else {
- config_string_set(&config.kconsumerd_err_unix_sock_path,
+ config_string_set(
+ &the_config.kconsumerd_err_unix_sock_path,
strdup(arg));
- if (!config.kconsumerd_err_unix_sock_path.value) {
+ if (!the_config.kconsumerd_err_unix_sock_path.value) {
ret = -ENOMEM;
PERROR("strdup");
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--kconsumerd-cmd-sock");
} else {
- config_string_set(&config.kconsumerd_cmd_unix_sock_path,
+ config_string_set(
+ &the_config.kconsumerd_cmd_unix_sock_path,
strdup(arg));
- if (!config.kconsumerd_cmd_unix_sock_path.value) {
+ if (!the_config.kconsumerd_cmd_unix_sock_path.value) {
ret = -ENOMEM;
PERROR("strdup");
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--ustconsumerd64-err-sock");
} else {
- config_string_set(&config.consumerd64_err_unix_sock_path,
+ config_string_set(
+ &the_config.consumerd64_err_unix_sock_path,
strdup(arg));
- if (!config.consumerd64_err_unix_sock_path.value) {
+ if (!the_config.consumerd64_err_unix_sock_path.value) {
ret = -ENOMEM;
PERROR("strdup");
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--ustconsumerd64-cmd-sock");
} else {
- config_string_set(&config.consumerd64_cmd_unix_sock_path,
+ config_string_set(
+ &the_config.consumerd64_cmd_unix_sock_path,
strdup(arg));
- if (!config.consumerd64_cmd_unix_sock_path.value) {
+ if (!the_config.consumerd64_cmd_unix_sock_path.value) {
ret = -ENOMEM;
PERROR("strdup");
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--ustconsumerd32-err-sock");
} else {
- config_string_set(&config.consumerd32_err_unix_sock_path,
+ config_string_set(
+ &the_config.consumerd32_err_unix_sock_path,
strdup(arg));
- if (!config.consumerd32_err_unix_sock_path.value) {
+ if (!the_config.consumerd32_err_unix_sock_path.value) {
ret = -ENOMEM;
PERROR("strdup");
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--ustconsumerd32-cmd-sock");
} else {
- config_string_set(&config.consumerd32_cmd_unix_sock_path,
+ config_string_set(
+ &the_config.consumerd32_cmd_unix_sock_path,
strdup(arg));
- if (!config.consumerd32_cmd_unix_sock_path.value) {
+ if (!the_config.consumerd32_cmd_unix_sock_path.value) {
ret = -ENOMEM;
PERROR("strdup");
}
}
} else if (string_match(optname, "no-kernel")) {
- config.no_kernel = true;
+ the_config.no_kernel = true;
} else if (string_match(optname, "quiet") || opt == 'q') {
- config.quiet = true;
+ the_config.quiet = true;
} else if (string_match(optname, "verbose") || opt == 'v') {
/* Verbose level can increase using multiple -v */
if (arg) {
/* Value obtained from config file */
- config.verbose = config_parse_value(arg);
+ the_config.verbose = config_parse_value(arg);
} else {
/* -v used on command line */
- config.verbose++;
+ the_config.verbose++;
}
/* Clamp value to [0, 3] */
- config.verbose = config.verbose < 0 ? 0 :
- (config.verbose <= 3 ? config.verbose : 3);
+ the_config.verbose = the_config.verbose < 0 ?
+ 0 :
+ (the_config.verbose <= 3 ? the_config.verbose :
+ 3);
} else if (string_match(optname, "verbose-consumer")) {
if (arg) {
- config.verbose_consumer = config_parse_value(arg);
+ the_config.verbose_consumer = config_parse_value(arg);
} else {
- config.verbose_consumer++;
+ the_config.verbose_consumer++;
}
} else if (string_match(optname, "consumerd32-path")) {
if (!arg || *arg == '\0') {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--consumerd32-path");
} else {
- config_string_set(&config.consumerd32_bin_path,
+ config_string_set(&the_config.consumerd32_bin_path,
strdup(arg));
- if (!config.consumerd32_bin_path.value) {
+ if (!the_config.consumerd32_bin_path.value) {
PERROR("strdup");
ret = -ENOMEM;
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--consumerd32-libdir");
} else {
- config_string_set(&config.consumerd32_lib_dir,
+ config_string_set(&the_config.consumerd32_lib_dir,
strdup(arg));
- if (!config.consumerd32_lib_dir.value) {
+ if (!the_config.consumerd32_lib_dir.value) {
PERROR("strdup");
ret = -ENOMEM;
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--consumerd64-path");
} else {
- config_string_set(&config.consumerd64_bin_path,
+ config_string_set(&the_config.consumerd64_bin_path,
strdup(arg));
- if (!config.consumerd64_bin_path.value) {
+ if (!the_config.consumerd64_bin_path.value) {
PERROR("strdup");
ret = -ENOMEM;
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--consumerd64-libdir");
} else {
- config_string_set(&config.consumerd64_lib_dir,
+ config_string_set(&the_config.consumerd64_lib_dir,
strdup(arg));
- if (!config.consumerd64_lib_dir.value) {
+ if (!the_config.consumerd64_lib_dir.value) {
PERROR("strdup");
ret = -ENOMEM;
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-p, --pidfile");
} else {
- config_string_set(&config.pid_file_path, strdup(arg));
- if (!config.pid_file_path.value) {
+ config_string_set(
+ &the_config.pid_file_path, strdup(arg));
+ if (!the_config.pid_file_path.value) {
PERROR("strdup");
ret = -ENOMEM;
}
ERR("Port overflow in --agent-tcp-port parameter: %s", arg);
return -1;
}
- config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v;
+ the_config.agent_tcp_port.begin =
+ the_config.agent_tcp_port.end = (int) v;
DBG3("Agent TCP port set to non default: %i", (int) v);
}
} else if (string_match(optname, "load") || opt == 'l') {
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"-l, --load");
} else {
- config_string_set(&config.load_session_path, strdup(arg));
- if (!config.load_session_path.value) {
+ config_string_set(&the_config.load_session_path,
+ strdup(arg));
+ if (!the_config.load_session_path.value) {
PERROR("strdup");
ret = -ENOMEM;
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--kmod-probes");
} else {
- config_string_set(&config.kmod_probes_list, strdup(arg));
- if (!config.kmod_probes_list.value) {
+ config_string_set(&the_config.kmod_probes_list,
+ strdup(arg));
+ if (!the_config.kmod_probes_list.value) {
PERROR("strdup");
ret = -ENOMEM;
}
WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
"--extra-kmod-probes");
} else {
- config_string_set(&config.kmod_extra_probes_list,
+ config_string_set(&the_config.kmod_extra_probes_list,
strdup(arg));
- if (!config.kmod_extra_probes_list.value) {
+ if (!the_config.kmod_extra_probes_list.value) {
PERROR("strdup");
ret = -ENOMEM;
}
}
+ } else if (string_match(optname, "event-notifier-error-number-of-bucket")) {
+ unsigned long v;
+
+ errno = 0;
+ v = strtoul(arg, NULL, 0);
+ if (errno != 0 || !isdigit(arg[0])) {
+ ERR("Wrong value in --event-notifier-error-number-of-bucket parameter: %s", arg);
+ return -1;
+ }
+ if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) {
+ ERR("Value out of range for --event-notifier-error-number-of-bucket parameter: %s", arg);
+ return -1;
+ }
+ the_config.event_notifier_error_counter_bucket = (int) v;
+ DBG3("Number of event notifier error counter set to non default: %i",
+ the_config.event_notifier_error_counter_bucket);
+ goto end;
} else if (string_match(optname, "config") || opt == 'f') {
/* This is handled in set_options() thus silent skip. */
goto end;
return ret;
}
+static void print_version(void) {
+ fprintf(stdout, "%s\n", VERSION);
+}
+
/*
* daemon configuration loading and argument parsing
*/
*/
static int create_lockfile(void)
{
- return utils_create_lock_file(config.lock_file_path.value);
+ return utils_create_lock_file(the_config.lock_file_path.value);
}
/*
* release the file system lock.
*/
if (lockfile_fd >= 0) {
- ret = remove(config.lock_file_path.value);
+ ret = remove(the_config.lock_file_path.value);
if (ret < 0) {
PERROR("remove lock file");
}
int ret;
gid_t gid;
- gid = utils_get_group_id(config.tracing_group_name.value);
+ ret = utils_get_group_id(
+ the_config.tracing_group_name.value, true, &gid);
+ if (ret) {
+ /* Default to root group. */
+ gid = 0;
+ }
/* Set lttng run dir */
ret = chown(rundir, 0, gid);
}
/* lttng client socket path */
- ret = chown(config.client_unix_sock_path.value, 0, gid);
+ ret = chown(the_config.client_unix_sock_path.value, 0, gid);
if (ret < 0) {
- ERR("Unable to set group on %s", config.client_unix_sock_path.value);
+ ERR("Unable to set group on %s",
+ the_config.client_unix_sock_path.value);
PERROR("chown");
}
/* kconsumer error socket path */
- ret = chown(kconsumer_data.err_unix_sock_path, 0, 0);
+ ret = chown(the_kconsumer_data.err_unix_sock_path, 0, 0);
if (ret < 0) {
- ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path);
+ ERR("Unable to set group on %s",
+ the_kconsumer_data.err_unix_sock_path);
PERROR("chown");
}
/* 64-bit ustconsumer error socket path */
- ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0);
+ ret = chown(the_ustconsumer64_data.err_unix_sock_path, 0, 0);
if (ret < 0) {
- ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path);
+ ERR("Unable to set group on %s",
+ the_ustconsumer64_data.err_unix_sock_path);
PERROR("chown");
}
/* 32-bit ustconsumer compat32 error socket path */
- ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0);
+ ret = chown(the_ustconsumer32_data.err_unix_sock_path, 0, 0);
if (ret < 0) {
- ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path);
+ ERR("Unable to set group on %s",
+ the_ustconsumer32_data.err_unix_sock_path);
PERROR("chown");
}
{
int ret;
- DBG3("Creating LTTng run directory: %s", config.rundir.value);
+ DBG3("Creating LTTng run directory: %s", the_config.rundir.value);
- ret = mkdir(config.rundir.value, S_IRWXU);
+ ret = mkdir(the_config.rundir.value, S_IRWXU);
if (ret < 0) {
if (errno != EEXIST) {
- ERR("Unable to create %s", config.rundir.value);
+ ERR("Unable to create %s", the_config.rundir.value);
goto error;
} else {
ret = 0;
switch (consumer_data->type) {
case LTTNG_CONSUMER_KERNEL:
- path = config.kconsumerd_path.value;
+ path = the_config.kconsumerd_path.value;
break;
case LTTNG_CONSUMER64_UST:
- path = config.consumerd64_path.value;
+ path = the_config.consumerd64_path.value;
break;
case LTTNG_CONSUMER32_UST:
- path = config.consumerd32_path.value;
+ path = the_config.consumerd32_path.value;
break;
default:
ERR("Consumer type unknown");
goto error;
}
if (is_root) {
- ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value));
+ gid_t gid;
+
+ ret = utils_get_group_id(the_config.tracing_group_name.value,
+ true, &gid);
+ if (ret) {
+ /* Default to root group. */
+ gid = 0;
+ }
+
+ ret = chown(path, 0, gid);
if (ret < 0) {
ERR("Unable to set group on %s", path);
PERROR("chown");
static int write_pidfile(void)
{
- return utils_create_pid_file(getpid(), config.pid_file_path.value);
+ return utils_create_pid_file(getpid(), the_config.pid_file_path.value);
}
static int set_clock_plugin_env(void)
int ret = 0;
char *env_value = NULL;
- if (!config.lttng_ust_clock_plugin.value) {
+ if (!the_config.lttng_ust_clock_plugin.value) {
goto end;
}
- ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s",
- config.lttng_ust_clock_plugin.value);
+ ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s",
+ the_config.lttng_ust_clock_plugin.value);
if (ret < 0) {
PERROR("asprintf");
goto end;
}
DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"",
- config.lttng_ust_clock_plugin.value);
+ the_config.lttng_ust_clock_plugin.value);
end:
return ret;
}
goto unlock_session;
}
(void) cmd_stop_trace(session);
- (void) cmd_destroy_session(session,
- notification_thread_handle);
+ (void) cmd_destroy_session(
+ session, the_notification_thread_handle, NULL);
unlock_session:
session_unlock(session);
session_put(session);
DBG("Destruction of all sessions completed");
}
+static void unregister_all_triggers(void)
+{
+ enum lttng_error_code ret_code;
+ enum lttng_trigger_status trigger_status;
+ struct lttng_triggers *triggers = NULL;
+ unsigned int trigger_count, i;
+ const struct lttng_credentials creds = {
+ .uid = LTTNG_OPTIONAL_INIT_VALUE(0),
+ };
+
+ DBG("Unregistering all triggers");
+
+ /*
+ * List all triggers as "root" since we wish to unregister all triggers.
+ */
+ ret_code = notification_thread_command_list_triggers(
+ the_notification_thread_handle, creds.uid.value,
+ &triggers);
+ if (ret_code != LTTNG_OK) {
+ ERR("Failed to list triggers while unregistering all triggers");
+ goto end;
+ }
+
+ trigger_status = lttng_triggers_get_count(triggers, &trigger_count);
+ assert(trigger_status == LTTNG_TRIGGER_STATUS_OK);
+
+ for (i = 0; i < trigger_count; i++) {
+ uid_t trigger_owner;
+ const char *trigger_name;
+ const struct lttng_trigger *trigger =
+ lttng_triggers_get_at_index(triggers, i);
+
+ assert(trigger);
+
+ trigger_status = lttng_trigger_get_owner_uid(
+ trigger, &trigger_owner);
+ assert(trigger_status == LTTNG_TRIGGER_STATUS_OK);
+
+ trigger_status = lttng_trigger_get_name(trigger, &trigger_name);
+ assert(trigger_status == LTTNG_TRIGGER_STATUS_OK);
+
+ DBG("Unregistering trigger: trigger owner uid = %d, trigger name = '%s'",
+ (int) trigger_owner, trigger_name);
+
+ ret_code = cmd_unregister_trigger(&creds, trigger,
+ the_notification_thread_handle);
+ if (ret_code != LTTNG_OK) {
+ ERR("Failed to unregister trigger: trigger owner uid = %d, trigger name = '%s', error: '%s'",
+ (int) trigger_owner, trigger_name,
+ lttng_strerror(-ret_code));
+ /* Continue to unregister the remaining triggers. */
+ }
+ }
+end:
+ lttng_triggers_destroy(triggers);
+}
+
+static int run_as_worker_post_fork_cleanup(void *data)
+{
+ struct sessiond_config *sessiond_config = data;
+
+ sessiond_config_fini(sessiond_config);
+ return 0;
+}
+
+static int launch_run_as_worker(const char *procname)
+{
+ /*
+ * Clean-up before forking the run-as worker. Any dynamically
+ * allocated memory of which the worker is not aware will
+ * be leaked as the process forks a run-as worker (and performs
+ * no exec*()). The same would apply to any opened fd.
+ */
+ return run_as_create_worker(
+ procname, run_as_worker_post_fork_cleanup, &the_config);
+}
+
+static void sessiond_uuid_log(void)
+{
+ char uuid_str[LTTNG_UUID_STR_LEN];
+
+ lttng_uuid_to_str(the_sessiond_uuid, uuid_str);
+ DBG("Starting lttng-sessiond {%s}", uuid_str);
+}
+
/*
* main
*/
struct lttng_thread *notification_thread = NULL;
struct lttng_thread *register_apps_thread = NULL;
+ logger_set_thread_name("Main", false);
init_kernel_workarounds();
rcu_register_thread();
goto exit_set_signal_handler;
}
- page_size = sysconf(_SC_PAGESIZE);
- if (page_size < 0) {
+ the_page_size = sysconf(_SC_PAGESIZE);
+ if (the_page_size < 0) {
PERROR("sysconf _SC_PAGESIZE");
- page_size = LONG_MAX;
- WARN("Fallback page size to %ld", page_size);
+ the_page_size = LONG_MAX;
+ WARN("Fallback page size to %ld", the_page_size);
}
- ret = sessiond_config_init(&config);
+ ret = sessiond_config_init(&the_config);
if (ret) {
retval = -1;
goto exit_set_signal_handler;
* Init config from environment variables.
* Command line option override env configuration per-doc. Do env first.
*/
- sessiond_config_apply_env_config(&config);
+ sessiond_config_apply_env_config(&the_config);
/*
* Parse arguments and load the daemon configuration file.
* since daemonizing causes the sessiond's current working directory
* to '/'.
*/
- ret = sessiond_config_resolve_paths(&config);
+ ret = sessiond_config_resolve_paths(&the_config);
if (ret) {
goto exit_options;
}
/* Apply config. */
- lttng_opt_verbose = config.verbose;
- lttng_opt_quiet = config.quiet;
- kconsumer_data.err_unix_sock_path =
- config.kconsumerd_err_unix_sock_path.value;
- kconsumer_data.cmd_unix_sock_path =
- config.kconsumerd_cmd_unix_sock_path.value;
- ustconsumer32_data.err_unix_sock_path =
- config.consumerd32_err_unix_sock_path.value;
- ustconsumer32_data.cmd_unix_sock_path =
- config.consumerd32_cmd_unix_sock_path.value;
- ustconsumer64_data.err_unix_sock_path =
- config.consumerd64_err_unix_sock_path.value;
- ustconsumer64_data.cmd_unix_sock_path =
- config.consumerd64_cmd_unix_sock_path.value;
+ lttng_opt_verbose = the_config.verbose;
+ lttng_opt_quiet = the_config.quiet;
+ the_kconsumer_data.err_unix_sock_path =
+ the_config.kconsumerd_err_unix_sock_path.value;
+ the_kconsumer_data.cmd_unix_sock_path =
+ the_config.kconsumerd_cmd_unix_sock_path.value;
+ the_ustconsumer32_data.err_unix_sock_path =
+ the_config.consumerd32_err_unix_sock_path.value;
+ the_ustconsumer32_data.cmd_unix_sock_path =
+ the_config.consumerd32_cmd_unix_sock_path.value;
+ the_ustconsumer64_data.err_unix_sock_path =
+ the_config.consumerd64_err_unix_sock_path.value;
+ the_ustconsumer64_data.cmd_unix_sock_path =
+ the_config.consumerd64_cmd_unix_sock_path.value;
set_clock_plugin_env();
- sessiond_config_log(&config);
+ sessiond_config_log(&the_config);
+ sessiond_uuid_log();
+
+ if (opt_print_version) {
+ print_version();
+ retval = 0;
+ goto exit_options;
+ }
if (create_lttng_rundir()) {
retval = -1;
}
/* Daemonize */
- if (config.daemonize || config.background) {
+ if (the_config.daemonize || the_config.background) {
int i;
- ret = lttng_daemonize(&child_ppid, &recv_child_signal,
- !config.background);
+ ret = lttng_daemonize(&the_child_ppid, &recv_child_signal,
+ !the_config.background);
if (ret < 0) {
retval = -1;
goto exit_options;
}
}
- if (run_as_create_worker(argv[0]) < 0) {
+ if (launch_run_as_worker(argv[0]) < 0) {
goto exit_create_run_as_worker_cleanup;
}
* Initialize the health check subsystem. This call should set the
* appropriate time values.
*/
- health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES);
- if (!health_sessiond) {
+ the_health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES);
+ if (!the_health_sessiond) {
PERROR("health_app_create error");
retval = -1;
goto stop_threads;
retval = -1;
goto stop_threads;
}
- kconsumer_data.channel_monitor_pipe =
+ the_kconsumer_data.channel_monitor_pipe =
lttng_pipe_release_writefd(
- kernel_channel_monitor_pipe);
- if (kconsumer_data.channel_monitor_pipe < 0) {
+ kernel_channel_monitor_pipe);
+ if (the_kconsumer_data.channel_monitor_pipe < 0) {
retval = -1;
goto stop_threads;
}
}
/* Set consumer initial state */
- kernel_consumerd_state = CONSUMER_STOPPED;
- ust_consumerd_state = CONSUMER_STOPPED;
+ the_kernel_consumerd_state = CONSUMER_STOPPED;
+ the_ust_consumerd_state = CONSUMER_STOPPED;
ust32_channel_monitor_pipe = lttng_pipe_open(0);
if (!ust32_channel_monitor_pipe) {
retval = -1;
goto stop_threads;
}
- ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd(
- ust32_channel_monitor_pipe);
- if (ustconsumer32_data.channel_monitor_pipe < 0) {
+ the_ustconsumer32_data.channel_monitor_pipe =
+ lttng_pipe_release_writefd(ust32_channel_monitor_pipe);
+ if (the_ustconsumer32_data.channel_monitor_pipe < 0) {
retval = -1;
goto stop_threads;
}
retval = -1;
goto stop_threads;
}
- ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd(
- ust64_channel_monitor_pipe);
- if (ustconsumer64_data.channel_monitor_pipe < 0) {
+ the_ustconsumer64_data.channel_monitor_pipe =
+ lttng_pipe_release_writefd(ust64_channel_monitor_pipe);
+ if (the_ustconsumer64_data.channel_monitor_pipe < 0) {
retval = -1;
goto stop_threads;
}
goto stop_threads;
}
+ event_notifier_error_accounting_init(the_config.event_notifier_error_counter_bucket);
+
/*
* Initialize agent app hash table. We allocate the hash table here
* since cleanup() can get called after this point.
goto stop_threads;
}
+ if (agent_by_event_notifier_domain_ht_create()) {
+ ERR("Failed to allocate per-event notifier domain agent hash table");
+ retval = -1;
+ goto stop_threads;
+ }
/*
* These actions must be executed as root. We do that *after* setting up
* the sockets path because we MUST make the check for another daemon using
* kernel tracer.
*/
if (is_root) {
- if (set_consumer_sockets(&kconsumer_data)) {
+ if (set_consumer_sockets(&the_kconsumer_data)) {
retval = -1;
goto stop_threads;
}
/* Setup kernel tracer */
- if (!config.no_kernel) {
+ if (!the_config.no_kernel) {
init_kernel_tracer();
- if (kernel_tracer_fd >= 0) {
- ret = syscall_init_table();
- if (ret < 0) {
- ERR("Unable to populate syscall table. "
- "Syscall tracing won't work "
- "for this session daemon.");
- }
- }
}
/* Set ulimit for open files */
/* init lttng_fd tracking must be done after set_ulimit. */
lttng_fd_init();
- if (set_consumer_sockets(&ustconsumer64_data)) {
- retval = -1;
- goto stop_threads;
- }
-
- if (set_consumer_sockets(&ustconsumer32_data)) {
+ if (set_consumer_sockets(&the_ustconsumer64_data)) {
retval = -1;
goto stop_threads;
}
- /* Set credentials to socket */
- if (is_root && set_permissions(config.rundir.value)) {
+ if (set_consumer_sockets(&the_ustconsumer32_data)) {
retval = -1;
goto stop_threads;
}
/* Get parent pid if -S, --sig-parent is specified. */
- if (config.sig_parent) {
- ppid = getppid();
+ if (the_config.sig_parent) {
+ the_ppid = getppid();
}
/* Setup the kernel pipe for waking up the kernel thread */
- if (is_root && !config.no_kernel) {
- if (utils_create_pipe_cloexec(kernel_poll_pipe)) {
+ if (is_root && !the_config.no_kernel) {
+ if (utils_create_pipe_cloexec(the_kernel_poll_pipe)) {
retval = -1;
goto stop_threads;
}
/* Check for the application socket timeout env variable. */
env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
if (env_app_timeout) {
- config.app_socket_timeout = atoi(env_app_timeout);
+ the_config.app_socket_timeout = atoi(env_app_timeout);
} else {
- config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT;
+ the_config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT;
}
ret = write_pidfile();
}
/* notification_thread_data acquires the pipes' read side. */
- notification_thread_handle = notification_thread_handle_create(
- ust32_channel_monitor_pipe,
- ust64_channel_monitor_pipe,
+ the_notification_thread_handle = notification_thread_handle_create(
+ ust32_channel_monitor_pipe, ust64_channel_monitor_pipe,
kernel_channel_monitor_pipe);
- if (!notification_thread_handle) {
+ if (!the_notification_thread_handle) {
retval = -1;
ERR("Failed to create notification thread shared data");
goto stop_threads;
/* Create notification thread. */
notification_thread = launch_notification_thread(
- notification_thread_handle);
+ the_notification_thread_handle);
if (!notification_thread) {
retval = -1;
goto stop_threads;
/* rotation_thread_data acquires the pipes' read side. */
rotation_thread_handle = rotation_thread_handle_create(
- rotation_timer_queue,
- notification_thread_handle);
+ rotation_timer_queue, the_notification_thread_handle);
if (!rotation_thread_handle) {
retval = -1;
ERR("Failed to create rotation thread shared data");
goto stop_threads;
}
+ /* Set credentials of the client socket and rundir */
+ if (is_root && set_permissions(the_config.rundir.value)) {
+ retval = -1;
+ goto stop_threads;
+ }
+
if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1],
apps_cmd_notify_pipe[1])) {
retval = -1;
}
/* Don't start this thread if kernel tracing is not requested nor root */
- if (is_root && !config.no_kernel) {
+ if (is_root && !the_config.no_kernel) {
/* Create kernel thread to manage kernel event */
- if (!launch_kernel_management_thread(kernel_poll_pipe[0])) {
+ if (!launch_kernel_management_thread(the_kernel_poll_pipe[0])) {
retval = -1;
goto stop_threads;
}
+
+ if (kernel_get_notification_fd() >= 0) {
+ ret = notification_thread_command_add_tracer_event_source(
+ the_notification_thread_handle,
+ kernel_get_notification_fd(),
+ LTTNG_DOMAIN_KERNEL);
+ if (ret != LTTNG_OK) {
+ ERR("Failed to add kernel trigger event source to notification thread");
+ retval = -1;
+ goto stop_threads;
+ }
+ }
}
/* Load sessions. */
- ret = config_load_session(config.load_session_path.value,
- NULL, 1, 1, NULL);
+ ret = config_load_session(
+ the_config.load_session_path.value, NULL, 1, 1, NULL);
if (ret) {
ERR("Session load failed: %s", error_get_str(ret));
retval = -1;
*/
/* Initiate teardown once activity occurs on the quit pipe. */
- sessiond_wait_for_quit_pipe(-1U);
+ sessiond_wait_for_quit_pipe(-1);
stop_threads:
+
/*
* Ensure that the client thread is no longer accepting new commands,
* which could cause new sessions to be created.
destroy_all_sessions_and_wait();
+ /*
+ * At this point no new trigger can be registered (no sessions are
+ * running/rotating) and clients can't connect to the session daemon
+ * anymore. Unregister all triggers.
+ */
+ unregister_all_triggers();
+
if (register_apps_thread) {
lttng_thread_shutdown(register_apps_thread);
lttng_thread_put(register_apps_thread);
rcu_thread_online();
sessiond_cleanup();
+ /*
+ * Wait for all pending call_rcu work to complete before shutting down
+ * the notification thread. This call_rcu work includes shutting down
+ * UST apps and event notifier pipes.
+ */
+ rcu_barrier();
+
if (notification_thread) {
lttng_thread_shutdown(notification_thread);
lttng_thread_put(notification_thread);
}
+ /*
+ * Error accounting teardown has to be done after the teardown of all
+ * event notifier pipes to ensure that no tracer may try to use the
+ * error accounting facilities.
+ */
+ event_notifier_error_accounting_fini();
+
+ /*
+ * Unloading the kernel modules needs to be done after all kernel
+ * ressources have been released. In our case, this includes the
+ * notification fd, the event notifier group fd, error accounting fd,
+ * all event and event notifier fds, etc.
+ *
+ * In short, at this point, we need to have called close() on all fds
+ * received from the kernel tracer.
+ */
+ if (is_root && !the_config.no_kernel) {
+ DBG("Unloading kernel modules");
+ modprobe_remove_lttng_all();
+ }
+
/*
* Ensure all prior call_rcu are done. call_rcu callbacks may push
* hash tables to the ht_cleanup thread. Therefore, we ensure that
* session daemon's teardown in order to allow it to be notified
* of the active session and channels at the moment of the teardown.
*/
- if (notification_thread_handle) {
- notification_thread_handle_destroy(notification_thread_handle);
+ if (the_notification_thread_handle) {
+ notification_thread_handle_destroy(
+ the_notification_thread_handle);
}
lttng_pipe_destroy(ust32_channel_monitor_pipe);
lttng_pipe_destroy(ust64_channel_monitor_pipe);
lttng_pipe_destroy(kernel_channel_monitor_pipe);
- health_app_destroy(health_sessiond);
+ if (the_health_sessiond) {
+ health_app_destroy(the_health_sessiond);
+ }
exit_create_run_as_worker_cleanup:
exit_options:
sessiond_cleanup_lock_file();
projects / lttng-tools.git / blobdiff