[lttng-tools.git] / src / bin / lttng-sessiond / sessiond-config.c

/*
 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#include "version.h"
#include "sessiond-config.h"
#include <assert.h>
#include "lttng-ust-ctl.h"
#include <common/defaults.h>
#include <limits.h>
#include <errno.h>
#include <ctype.h>
#include <common/error.h>
#include <common/utils.h>
#include <common/compat/getenv.h>

static
struct sessiond_config sessiond_config_build_defaults = {
	.quiet =		        	false,
	.verbose = 				0,
	.verbose_consumer = 			0,

	.agent_tcp_port = 			{ .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
	.trigger_error_counter_bucket =		4096,
	.app_socket_timeout = 			DEFAULT_APP_SOCKET_RW_TIMEOUT,

	.no_kernel = 				false,
	.background = 				false,
	.daemonize = 				false,
	.sig_parent = 				false,

	.tracing_group_name.value = 		(char *) DEFAULT_TRACING_GROUP,
	.kmod_probes_list.value =		NULL,
	.kmod_extra_probes_list.value =		NULL,

	.rundir.value =				NULL,

	.apps_unix_sock_path.value = 		NULL,
	.client_unix_sock_path.value = 		NULL,
	.wait_shm_path.value = 			NULL,
	.health_unix_sock_path.value = 		NULL,
	.lttng_ust_clock_plugin.value =		NULL,
	.pid_file_path.value =			NULL,
	.lock_file_path.value =			NULL,
	.agent_port_file_path.value =		NULL,
	.load_session_path.value =		NULL,

	.consumerd32_path.value =		NULL,
	.consumerd32_bin_path.value =		NULL,
	.consumerd32_lib_dir.value =		NULL,
	.consumerd32_err_unix_sock_path.value = NULL,
	.consumerd32_cmd_unix_sock_path.value = NULL,

	.consumerd64_path.value =		NULL,
	.consumerd64_bin_path.value =		NULL,
	.consumerd64_lib_dir.value =		NULL,
	.consumerd64_err_unix_sock_path.value = NULL,
	.consumerd64_cmd_unix_sock_path.value = NULL,

	.kconsumerd_path.value =		NULL,
	.kconsumerd_err_unix_sock_path.value = 	NULL,
	.kconsumerd_cmd_unix_sock_path.value = 	NULL,
};

static
void config_string_fini(struct config_string *str)
{
	config_string_set(str, NULL);
}

static
void config_string_set_static(struct config_string *config_str,
		const char *value)
{
	config_string_set(config_str, (char *) value);
	config_str->should_free = false;
}

/* Only use for dynamically-allocated strings. */
LTTNG_HIDDEN
void config_string_set(struct config_string *config_str, char *value)
{
	assert(config_str);
	if (config_str->should_free) {
		free(config_str->value);
		config_str->should_free = false;
	}

	config_str->should_free = !!value;
	config_str->value = value;
}

LTTNG_HIDDEN
int sessiond_config_apply_env_config(struct sessiond_config *config)
{
	int ret = 0;
	const char *env_value;

	env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
	if (env_value) {
		char *endptr;
		long int_val;

		errno = 0;
		int_val = strtoul(env_value, &endptr, 0);
		if (errno != 0 || int_val > INT_MAX ||
				(int_val < 0 && int_val != -1)) {
			ERR("Invalid value \"%s\" used for \"%s\" environment variable",
					env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
			ret = -1;
			goto end;
		}

		config->app_socket_timeout = int_val;
	}

	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
	if (env_value) {
		config_string_set_static(&config->consumerd32_bin_path,
				env_value);
	}
	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
	if (env_value) {
		config_string_set_static(&config->consumerd64_bin_path,
				env_value);
	}

	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
	if (env_value) {
		config_string_set_static(&config->consumerd32_lib_dir,
				env_value);
	}
	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
	if (env_value) {
		config_string_set_static(&config->consumerd64_lib_dir,
				env_value);
	}

	env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
	if (env_value) {
		config_string_set_static(&config->lttng_ust_clock_plugin,
				env_value);
	}

	env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
	if (env_value) {
		config_string_set_static(&config->kmod_probes_list,
				env_value);
	}

	env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
	if (env_value) {
		config_string_set_static(&config->kmod_extra_probes_list,
				env_value);
	}
end:
	return ret;
}

static
int config_set_paths_root(struct sessiond_config *config)
{
	int ret = 0;

	config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
	if (!config->rundir.value) {
		ERR("Failed to set rundir");
		ret = -1;
		goto end;
	}

	config_string_set_static(&config->apps_unix_sock_path,
			DEFAULT_GLOBAL_APPS_UNIX_SOCK);
	config_string_set_static(&config->client_unix_sock_path,
			DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
	config_string_set_static(&config->wait_shm_path,
			DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
	config_string_set_static(&config->health_unix_sock_path,
			DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
end:
	return ret;
}

static
int config_set_paths_non_root(struct sessiond_config *config)
{
	int ret = 0;
	const char *home_path = utils_get_home_dir();
	char *str;

	if (home_path == NULL) {
		ERR("Can't get HOME directory for sockets creation.");
		ret = -1;
		goto end;
	}

	/*
	 * Create rundir from home path. This will create something like
	 * $HOME/.lttng
	 */
	ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
	if (ret < 0) {
		ERR("Failed to set rundir");
		goto end;
	}
	config_string_set(&config->rundir, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home apps unix socket path");
		goto end;
	}
	config_string_set(&config->apps_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home client unix socket path");
		goto end;
	}
	config_string_set(&config->client_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
	if (ret < 0) {
		ERR("Failed to set default home apps wait shm path");
		goto end;
	}
	config_string_set(&config->wait_shm_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
	if (ret < 0) {
		ERR("Failed to set default home health UNIX socket path");
		goto end;
	}
	config_string_set(&config->health_unix_sock_path, str);
	str = NULL;

	ret = 0;
end:
	return ret;
}

LTTNG_HIDDEN
int sessiond_config_init(struct sessiond_config *config)
{
	int ret;
	bool is_root = (getuid() == 0);
	char *str;

	assert(config);
	memcpy(config, &sessiond_config_build_defaults, sizeof(*config));

	if (is_root) {
		ret = config_set_paths_root(config);
	} else {
		ret = config_set_paths_non_root(config);
	}
	if (ret < 0) {
		goto error;
	}

	/* 32 bits consumerd path setup */
	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer path");
		goto error;
	}
	config_string_set(&config->consumerd32_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer error socket path");
		goto error;
	}
	config_string_set(&config->consumerd32_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 32-bit consumer command socket path");
		goto error;
	}
	config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
	str = NULL;

	/* 64 bits consumerd path setup */
	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer path");
		goto error;
	}
	config_string_set(&config->consumerd64_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer error socket path");
		goto error;
	}
	config_string_set(&config->consumerd64_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set 64-bit consumer command socket path");
		goto error;
	}
	config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
	str = NULL;

	/* kconsumerd consumerd path setup */
	ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer path");
		goto error;
	}
	config_string_set(&config->kconsumerd_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer error socket path");
		goto error;
	}
	config_string_set(&config->kconsumerd_err_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
			config->rundir.value);
	if (ret < 0) {
		ERR("Failed to set kernel consumer command socket path");
		goto error;
	}
	config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_PIDFILE);
	if (ret < 0) {
		ERR("Failed to set PID file path");
		goto error;
	}
	config_string_set(&config->pid_file_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_LOCKFILE);
	if (ret < 0) {
		ERR("Failed to set lock file path");
		goto error;
	}
	config_string_set(&config->lock_file_path, str);
	str = NULL;

	ret = asprintf(&str, "%s/%s", config->rundir.value,
			DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
	if (ret < 0) {
		ERR("Failed to set agent port file path");
		goto error;
	}
	config_string_set(&config->agent_port_file_path, str);
	str = NULL;

	/*
	 * Allow INSTALL_BIN_PATH to be used as a target path for the
	 * native architecture size consumer if CONFIG_CONSUMER*_PATH
	 * has not been defined.
	 */
#if (CAA_BITS_PER_LONG == 32)
	config_string_set_static(&config->consumerd32_bin_path,
			INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	config_string_set_static(&config->consumerd32_lib_dir,
			INSTALL_LIB_PATH);
#elif (CAA_BITS_PER_LONG == 64)
	config_string_set_static(&config->consumerd64_bin_path,
			INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	config_string_set_static(&config->consumerd64_lib_dir,
			INSTALL_LIB_PATH);
#else
#error "Unknown bitness"
#endif
	ret = 0;
	return ret;
error:
	sessiond_config_fini(config);
	return ret;
}

LTTNG_HIDDEN
void sessiond_config_fini(struct sessiond_config *config)
{
	config_string_fini(&config->tracing_group_name);
	config_string_fini(&config->kmod_probes_list);
	config_string_fini(&config->kmod_extra_probes_list);
	config_string_fini(&config->rundir);
	config_string_fini(&config->apps_unix_sock_path);
	config_string_fini(&config->client_unix_sock_path);
	config_string_fini(&config->wait_shm_path);
	config_string_fini(&config->health_unix_sock_path);
	config_string_fini(&config->lttng_ust_clock_plugin);
	config_string_fini(&config->pid_file_path);
	config_string_fini(&config->lock_file_path);
	config_string_fini(&config->load_session_path);
	config_string_fini(&config->agent_port_file_path);
	config_string_fini(&config->consumerd32_path);
	config_string_fini(&config->consumerd32_bin_path);
	config_string_fini(&config->consumerd32_lib_dir);
	config_string_fini(&config->consumerd32_err_unix_sock_path);
	config_string_fini(&config->consumerd32_cmd_unix_sock_path);
	config_string_fini(&config->consumerd64_path);
	config_string_fini(&config->consumerd64_bin_path);
	config_string_fini(&config->consumerd64_lib_dir);
	config_string_fini(&config->consumerd64_err_unix_sock_path);
	config_string_fini(&config->consumerd64_cmd_unix_sock_path);
	config_string_fini(&config->kconsumerd_path);
	config_string_fini(&config->kconsumerd_err_unix_sock_path);
	config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
}

static
int resolve_path(struct config_string *path)
{
	int ret = 0;
	char *absolute_path;

	if (!path->value || path->value[0] == '/') {
		goto end;
	}

	absolute_path = utils_expand_path(path->value);
	if (!absolute_path) {
		ret = -1;
		goto end;
	}

	config_string_set(path, absolute_path);
end:
	return ret;
}

#define RESOLVE_CHECK(path_config_str)		\
	if (resolve_path(path_config_str))	\
		return -1

LTTNG_HIDDEN
int sessiond_config_resolve_paths(struct sessiond_config *config)
{
	RESOLVE_CHECK(&config->apps_unix_sock_path);
	RESOLVE_CHECK(&config->client_unix_sock_path);
	RESOLVE_CHECK(&config->wait_shm_path);
	RESOLVE_CHECK(&config->health_unix_sock_path);
	RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
	RESOLVE_CHECK(&config->pid_file_path);
	RESOLVE_CHECK(&config->lock_file_path);
	RESOLVE_CHECK(&config->load_session_path);
	RESOLVE_CHECK(&config->agent_port_file_path);
	RESOLVE_CHECK(&config->consumerd32_path);
	RESOLVE_CHECK(&config->consumerd32_bin_path);
	RESOLVE_CHECK(&config->consumerd32_lib_dir);
	RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd64_path);
	RESOLVE_CHECK(&config->consumerd64_bin_path);
	RESOLVE_CHECK(&config->consumerd64_lib_dir);
	RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
	RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
	RESOLVE_CHECK(&config->kconsumerd_path);
	RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
	RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
	return 0;
}

LTTNG_HIDDEN
void sessiond_config_log(struct sessiond_config *config)
{
	DBG_NO_LOC("[sessiond configuration]");
	DBG_NO_LOC("\tversion                        %s", VERSION);
	if (GIT_VERSION[0] != '\0') {
		DBG_NO_LOC("\tgit version                    %s", GIT_VERSION);
	}
	if (EXTRA_VERSION_NAME[0] != '\0') {
		DBG_NO_LOC("\textra version name             %s", EXTRA_VERSION_NAME);
	}
	if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
		DBG_NO_LOC("\textra version description:\n\t%s", EXTRA_VERSION_DESCRIPTION);
	}
	if (EXTRA_VERSION_PATCHES[0] != '\0') {
		DBG_NO_LOC("\textra version patches:\n\t%s", EXTRA_VERSION_PATCHES);
	}
	DBG_NO_LOC("\tverbose:                       %i", config->verbose);
	DBG_NO_LOC("\tverbose consumer:              %i", config->verbose_consumer);
	DBG_NO_LOC("\tquiet mode:                    %s", config->quiet ? "True" : "False");
	if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
		DBG_NO_LOC("\tagent_tcp_port:                %i", config->agent_tcp_port.begin);
	} else {
		DBG_NO_LOC("\tagent_tcp_port:                [%i, %i]",
				config->agent_tcp_port.begin,
				config->agent_tcp_port.end);
	}
	DBG_NO_LOC("\tapplication socket timeout:    %i", config->app_socket_timeout);
	DBG_NO_LOC("\tno-kernel:                     %s", config->no_kernel ? "True" : "False");
	DBG_NO_LOC("\tbackground:                    %s", config->background ? "True" : "False");
	DBG_NO_LOC("\tdaemonize:                     %s", config->daemonize ? "True" : "False");
	DBG_NO_LOC("\tsignal parent on start:        %s", config->sig_parent ? "True" : "False");
	DBG_NO_LOC("\ttracing group name:            %s", config->tracing_group_name.value ? : "Unknown");
	DBG_NO_LOC("\tkmod_probe_list:               %s", config->kmod_probes_list.value ? : "None");
	DBG_NO_LOC("\tkmod_extra_probe_list:         %s", config->kmod_extra_probes_list.value ? : "None");
	DBG_NO_LOC("\trundir:                        %s", config->rundir.value ? : "Unknown");
	DBG_NO_LOC("\tapplication socket path:       %s", config->apps_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tclient socket path:            %s", config->client_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\twait shm path:                 %s", config->wait_shm_path.value ? : "Unknown");
	DBG_NO_LOC("\thealth socket path:            %s", config->health_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN:        %s", config->lttng_ust_clock_plugin.value ? : "None");
	DBG_NO_LOC("\tpid file path:                 %s", config->pid_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tlock file path:                %s", config->lock_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tsession load path:             %s", config->load_session_path.value ? : "None");
	DBG_NO_LOC("\tagent port file path:          %s", config->agent_port_file_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 path:              %s", config->consumerd32_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 bin path:          %s", config->consumerd32_bin_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 lib dir:           %s", config->consumerd32_lib_dir.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 path:              %s", config->consumerd64_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 bin path:          %s", config->consumerd64_bin_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 lib dir:           %s", config->consumerd64_lib_dir.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd path:               %s", config->kconsumerd_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
	DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
}
Commit	Line	Data
e6142f2e	1	/*
ab5be9fa	2	* Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
e6142f2e	3	*
ab5be9fa	4	* SPDX-License-Identifier: GPL-2.0-only
e6142f2e	5	*
e6142f2e JG	6	*/
e6142f2e JG	7
a3bc3918	8	#include "version.h"
e6142f2e JG	9	#include "sessiond-config.h"
	10	#include <assert.h>
	11	#include "lttng-ust-ctl.h"
	12	#include <common/defaults.h>
	13	#include <limits.h>
	14	#include <errno.h>
	15	#include <ctype.h>
	16	#include <common/error.h>
	17	#include <common/utils.h>
	18	#include <common/compat/getenv.h>
	19
	20	static
	21	struct sessiond_config sessiond_config_build_defaults = {
	22	.quiet = false,
	23	.verbose = 0,
	24	.verbose_consumer = 0,
	25
2288467f	26	.agent_tcp_port = { .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
2463b787	27	.trigger_error_counter_bucket = 4096,
e6142f2e JG	28	.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT,
	29
	30	.no_kernel = false,
	31	.background = false,
	32	.daemonize = false,
	33	.sig_parent = false,
	34
b53d4e59	35	.tracing_group_name.value = (char *) DEFAULT_TRACING_GROUP,
e6142f2e JG	36	.kmod_probes_list.value = NULL,
	37	.kmod_extra_probes_list.value = NULL,
	38
	39	.rundir.value = NULL,
	40
	41	.apps_unix_sock_path.value = NULL,
	42	.client_unix_sock_path.value = NULL,
	43	.wait_shm_path.value = NULL,
	44	.health_unix_sock_path.value = NULL,
	45	.lttng_ust_clock_plugin.value = NULL,
	46	.pid_file_path.value = NULL,
	47	.lock_file_path.value = NULL,
	48	.agent_port_file_path.value = NULL,
	49	.load_session_path.value = NULL,
	50
	51	.consumerd32_path.value = NULL,
	52	.consumerd32_bin_path.value = NULL,
	53	.consumerd32_lib_dir.value = NULL,
	54	.consumerd32_err_unix_sock_path.value = NULL,
	55	.consumerd32_cmd_unix_sock_path.value = NULL,
	56
	57	.consumerd64_path.value = NULL,
	58	.consumerd64_bin_path.value = NULL,
	59	.consumerd64_lib_dir.value = NULL,
	60	.consumerd64_err_unix_sock_path.value = NULL,
	61	.consumerd64_cmd_unix_sock_path.value = NULL,
	62
	63	.kconsumerd_path.value = NULL,
	64	.kconsumerd_err_unix_sock_path.value = NULL,
	65	.kconsumerd_cmd_unix_sock_path.value = NULL,
	66	};
	67
	68	static
	69	void config_string_fini(struct config_string *str)
	70	{
	71	config_string_set(str, NULL);
	72	}
	73
	74	static
	75	void config_string_set_static(struct config_string *config_str,
	76	const char *value)
	77	{
	78	config_string_set(config_str, (char *) value);
	79	config_str->should_free = false;
	80	}
	81
	82	/* Only use for dynamically-allocated strings. */
	83	LTTNG_HIDDEN
	84	void config_string_set(struct config_string config_str, char value)
	85	{
	86	assert(config_str);
	87	if (config_str->should_free) {
	88	free(config_str->value);
	89	config_str->should_free = false;
	90	}
	91
	92	config_str->should_free = !!value;
	93	config_str->value = value;
	94	}
	95
	96	LTTNG_HIDDEN
	97	int sessiond_config_apply_env_config(struct sessiond_config *config)
	98	{
	99	int ret = 0;
100	const char *env_value;
101
102	env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
103	if (env_value) {
104	char *endptr;
105	long int_val;
106
107	errno = 0;
108	int_val = strtoul(env_value, &endptr, 0);
109	if (errno != 0 \|\| int_val > INT_MAX \|\|
110	(int_val < 0 && int_val != -1)) {
111	ERR("Invalid value \"%s\" used for \"%s\" environment variable",
112	env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
113	ret = -1;
114	goto end;
115	}
116
117	config->app_socket_timeout = int_val;
118	}
119
120	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
121	if (env_value) {
122	config_string_set_static(&config->consumerd32_bin_path,
123	env_value);
124	}
125	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
126	if (env_value) {
127	config_string_set_static(&config->consumerd64_bin_path,
128	env_value);
129	}
130
131	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
132	if (env_value) {
133	config_string_set_static(&config->consumerd32_lib_dir,
134	env_value);
135	}
136	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
137	if (env_value) {
138	config_string_set_static(&config->consumerd64_lib_dir,
139	env_value);
140	}
141
142	env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
143	if (env_value) {
144	config_string_set_static(&config->lttng_ust_clock_plugin,
145	env_value);
146	}
147
148	env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
149	if (env_value) {
150	config_string_set_static(&config->kmod_probes_list,
151	env_value);
152	}
153
154	env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
155	if (env_value) {
156	config_string_set_static(&config->kmod_extra_probes_list,
157	env_value);
158	}
159	end:
160	return ret;
161	}
162
163	static
164	int config_set_paths_root(struct sessiond_config *config)
165	{
166	int ret = 0;
167
168	config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
169	if (!config->rundir.value) {
170	ERR("Failed to set rundir");
171	ret = -1;
172	goto end;
173	}
174
175	config_string_set_static(&config->apps_unix_sock_path,
176	DEFAULT_GLOBAL_APPS_UNIX_SOCK);
177	config_string_set_static(&config->client_unix_sock_path,
178	DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
179	config_string_set_static(&config->wait_shm_path,
180	DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
181	config_string_set_static(&config->health_unix_sock_path,
182	DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
e6142f2e JG	183	end:
	184	return ret;
	185	}
	186
	187	static
	188	int config_set_paths_non_root(struct sessiond_config *config)
	189	{
	190	int ret = 0;
	191	const char *home_path = utils_get_home_dir();
	192	char *str;
	193
	194	if (home_path == NULL) {
	195	ERR("Can't get HOME directory for sockets creation.");
	196	ret = -1;
	197	goto end;
	198	}
	199
	200	/*
	201	* Create rundir from home path. This will create something like
	202	* $HOME/.lttng
	203	*/
	204	ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
	205	if (ret < 0) {
	206	ERR("Failed to set rundir");
	207	goto end;
	208	}
	209	config_string_set(&config->rundir, str);
	210	str = NULL;
	211
	212	ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
	213	if (ret < 0) {
	214	ERR("Failed to set default home apps unix socket path");
	215	goto end;
	216	}
	217	config_string_set(&config->apps_unix_sock_path, str);
	218	str = NULL;
	219
	220	ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
	221	if (ret < 0) {
	222	ERR("Failed to set default home client unix socket path");
	223	goto end;
	224	}
	225	config_string_set(&config->client_unix_sock_path, str);
	226	str = NULL;
	227
	228	ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
	229	if (ret < 0) {
	230	ERR("Failed to set default home apps wait shm path");
	231	goto end;
	232	}
	233	config_string_set(&config->wait_shm_path, str);
	234	str = NULL;
	235
	236	ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
	237	if (ret < 0) {
	238	ERR("Failed to set default home health UNIX socket path");
	239	goto end;
	240	}
	241	config_string_set(&config->health_unix_sock_path, str);
	242	str = NULL;
	243
	244	ret = 0;
	245	end:
	246	return ret;
247	}
248
249	LTTNG_HIDDEN
250	int sessiond_config_init(struct sessiond_config *config)
251	{
252	int ret;
253	bool is_root = (getuid() == 0);
254	char *str;
255
256	assert(config);
257	memcpy(config, &sessiond_config_build_defaults, sizeof(*config));
258
259	if (is_root) {
260	ret = config_set_paths_root(config);
261	} else {
262	ret = config_set_paths_non_root(config);
263	}
2a9f757b	264	if (ret < 0) {
c9a2957d	265	goto error;
2a9f757b	266	}
e6142f2e JG	267
	268	/* 32 bits consumerd path setup */
	269	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
	270	config->rundir.value);
	271	if (ret < 0) {
	272	ERR("Failed to set 32-bit consumer path");
c9a2957d	273	goto error;
e6142f2e JG	274	}
	275	config_string_set(&config->consumerd32_path, str);
	276	str = NULL;
	277
	278	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
	279	config->rundir.value);
	280	if (ret < 0) {
	281	ERR("Failed to set 32-bit consumer error socket path");
c9a2957d	282	goto error;
e6142f2e JG	283	}
	284	config_string_set(&config->consumerd32_err_unix_sock_path, str);
	285	str = NULL;
	286
	287	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
	288	config->rundir.value);
	289	if (ret < 0) {
	290	ERR("Failed to set 32-bit consumer command socket path");
c9a2957d	291	goto error;
e6142f2e JG	292	}
	293	config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
	294	str = NULL;
	295
	296	/* 64 bits consumerd path setup */
	297	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
	298	config->rundir.value);
	299	if (ret < 0) {
	300	ERR("Failed to set 64-bit consumer path");
c9a2957d	301	goto error;
e6142f2e JG	302	}
	303	config_string_set(&config->consumerd64_path, str);
	304	str = NULL;
	305
	306	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
	307	config->rundir.value);
	308	if (ret < 0) {
	309	ERR("Failed to set 64-bit consumer error socket path");
c9a2957d	310	goto error;
e6142f2e JG	311	}
	312	config_string_set(&config->consumerd64_err_unix_sock_path, str);
	313	str = NULL;
	314
	315	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
	316	config->rundir.value);
	317	if (ret < 0) {
	318	ERR("Failed to set 64-bit consumer command socket path");
c9a2957d	319	goto error;
e6142f2e JG	320	}
	321	config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
	322	str = NULL;
	323
	324	/* kconsumerd consumerd path setup */
	325	ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
	326	config->rundir.value);
	327	if (ret < 0) {
	328	ERR("Failed to set kernel consumer path");
c9a2957d	329	goto error;
e6142f2e JG	330	}
	331	config_string_set(&config->kconsumerd_path, str);
	332	str = NULL;
	333
4a08b740 JG	334	ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
	335	config->rundir.value);
	336	if (ret < 0) {
	337	ERR("Failed to set kernel consumer error socket path");
c9a2957d	338	goto error;
4a08b740 JG	339	}
	340	config_string_set(&config->kconsumerd_err_unix_sock_path, str);
	341	str = NULL;
	342
	343	ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
	344	config->rundir.value);
	345	if (ret < 0) {
	346	ERR("Failed to set kernel consumer command socket path");
c9a2957d	347	goto error;
4a08b740 JG	348	}
	349	config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
	350	str = NULL;
	351
e6142f2e JG	352	ret = asprintf(&str, "%s/%s", config->rundir.value,
	353	DEFAULT_LTTNG_SESSIOND_PIDFILE);
	354	if (ret < 0) {
	355	ERR("Failed to set PID file path");
c9a2957d	356	goto error;
e6142f2e JG	357	}
	358	config_string_set(&config->pid_file_path, str);
	359	str = NULL;
	360
	361	ret = asprintf(&str, "%s/%s", config->rundir.value,
	362	DEFAULT_LTTNG_SESSIOND_LOCKFILE);
	363	if (ret < 0) {
	364	ERR("Failed to set lock file path");
c9a2957d	365	goto error;
e6142f2e JG	366	}
	367	config_string_set(&config->lock_file_path, str);
	368	str = NULL;
	369
	370	ret = asprintf(&str, "%s/%s", config->rundir.value,
	371	DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
	372	if (ret < 0) {
	373	ERR("Failed to set agent port file path");
c9a2957d	374	goto error;
e6142f2e JG	375	}
	376	config_string_set(&config->agent_port_file_path, str);
	377	str = NULL;
	378
	379	/*
	380	* Allow INSTALL_BIN_PATH to be used as a target path for the
	381	* native architecture size consumer if CONFIG_CONSUMER*_PATH
	382	* has not been defined.
	383	*/
	384	#if (CAA_BITS_PER_LONG == 32)
	385	config_string_set_static(&config->consumerd32_bin_path,
	386	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	387	config_string_set_static(&config->consumerd32_lib_dir,
	388	INSTALL_LIB_PATH);
	389	#elif (CAA_BITS_PER_LONG == 64)
	390	config_string_set_static(&config->consumerd64_bin_path,
	391	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	392	config_string_set_static(&config->consumerd64_lib_dir,
	393	INSTALL_LIB_PATH);
	394	#else
	395	#error "Unknown bitness"
	396	#endif
	397	ret = 0;
c9a2957d JG	398	return ret;
	399	error:
	400	sessiond_config_fini(config);
e6142f2e JG	401	return ret;
	402	}
	403
	404	LTTNG_HIDDEN
	405	void sessiond_config_fini(struct sessiond_config *config)
	406	{
	407	config_string_fini(&config->tracing_group_name);
	408	config_string_fini(&config->kmod_probes_list);
	409	config_string_fini(&config->kmod_extra_probes_list);
16ffecdb	410	config_string_fini(&config->rundir);
e6142f2e JG	411	config_string_fini(&config->apps_unix_sock_path);
	412	config_string_fini(&config->client_unix_sock_path);
	413	config_string_fini(&config->wait_shm_path);
	414	config_string_fini(&config->health_unix_sock_path);
	415	config_string_fini(&config->lttng_ust_clock_plugin);
	416	config_string_fini(&config->pid_file_path);
	417	config_string_fini(&config->lock_file_path);
	418	config_string_fini(&config->load_session_path);
	419	config_string_fini(&config->agent_port_file_path);
	420	config_string_fini(&config->consumerd32_path);
	421	config_string_fini(&config->consumerd32_bin_path);
	422	config_string_fini(&config->consumerd32_lib_dir);
	423	config_string_fini(&config->consumerd32_err_unix_sock_path);
	424	config_string_fini(&config->consumerd32_cmd_unix_sock_path);
	425	config_string_fini(&config->consumerd64_path);
	426	config_string_fini(&config->consumerd64_bin_path);
	427	config_string_fini(&config->consumerd64_lib_dir);
	428	config_string_fini(&config->consumerd64_err_unix_sock_path);
	429	config_string_fini(&config->consumerd64_cmd_unix_sock_path);
	430	config_string_fini(&config->kconsumerd_path);
	431	config_string_fini(&config->kconsumerd_err_unix_sock_path);
	432	config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
	433	}
	434
	435	static
	436	int resolve_path(struct config_string *path)
	437	{
	438	int ret = 0;
	439	char *absolute_path;
	440
	441	if (!path->value \|\| path->value[0] == '/') {
	442	goto end;
	443	}
	444
	445	absolute_path = utils_expand_path(path->value);
	446	if (!absolute_path) {
	447	ret = -1;
	448	goto end;
	449	}
	450
	451	config_string_set(path, absolute_path);
	452	end:
	453	return ret;
	454	}
	455
	456	#define RESOLVE_CHECK(path_config_str) \
	457	if (resolve_path(path_config_str)) \
	458	return -1
	459
	460	LTTNG_HIDDEN
	461	int sessiond_config_resolve_paths(struct sessiond_config *config)
	462	{
	463	RESOLVE_CHECK(&config->apps_unix_sock_path);
	464	RESOLVE_CHECK(&config->client_unix_sock_path);
	465	RESOLVE_CHECK(&config->wait_shm_path);
	466	RESOLVE_CHECK(&config->health_unix_sock_path);
	467	RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
	468	RESOLVE_CHECK(&config->pid_file_path);
	469	RESOLVE_CHECK(&config->lock_file_path);
	470	RESOLVE_CHECK(&config->load_session_path);
	471	RESOLVE_CHECK(&config->agent_port_file_path);
	472	RESOLVE_CHECK(&config->consumerd32_path);
	473	RESOLVE_CHECK(&config->consumerd32_bin_path);
	474	RESOLVE_CHECK(&config->consumerd32_lib_dir);
475	RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
476	RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
477	RESOLVE_CHECK(&config->consumerd64_path);
478	RESOLVE_CHECK(&config->consumerd64_bin_path);
479	RESOLVE_CHECK(&config->consumerd64_lib_dir);
480	RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
481	RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
482	RESOLVE_CHECK(&config->kconsumerd_path);
483	RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
484	RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
485	return 0;
486	}
487
488	LTTNG_HIDDEN
489	void sessiond_config_log(struct sessiond_config *config)
490	{
491	DBG_NO_LOC("[sessiond configuration]");
a3bc3918 JR	492	DBG_NO_LOC("\tversion %s", VERSION);
	493	if (GIT_VERSION[0] != '\0') {
	494	DBG_NO_LOC("\tgit version %s", GIT_VERSION);
	495	}
	496	if (EXTRA_VERSION_NAME[0] != '\0') {
	497	DBG_NO_LOC("\textra version name %s", EXTRA_VERSION_NAME);
	498	}
	499	if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
	500	DBG_NO_LOC("\textra version description:\n\t%s", EXTRA_VERSION_DESCRIPTION);
	501	}
7f5ed73a JR	502	if (EXTRA_VERSION_PATCHES[0] != '\0') {
	503	DBG_NO_LOC("\textra version patches:\n\t%s", EXTRA_VERSION_PATCHES);
	504	}
2ca43cb1 JR	505	DBG_NO_LOC("\tverbose: %i", config->verbose);
	506	DBG_NO_LOC("\tverbose consumer: %i", config->verbose_consumer);
	507	DBG_NO_LOC("\tquiet mode: %s", config->quiet ? "True" : "False");
2288467f	508	if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
2ca43cb1	509	DBG_NO_LOC("\tagent_tcp_port: %i", config->agent_tcp_port.begin);
2288467f	510	} else {
2ca43cb1	511	DBG_NO_LOC("\tagent_tcp_port: [%i, %i]",
2288467f JG	512	config->agent_tcp_port.begin,
	513	config->agent_tcp_port.end);
	514	}
2ca43cb1 JR	515	DBG_NO_LOC("\tapplication socket timeout: %i", config->app_socket_timeout);
	516	DBG_NO_LOC("\tno-kernel: %s", config->no_kernel ? "True" : "False");
	517	DBG_NO_LOC("\tbackground: %s", config->background ? "True" : "False");
	518	DBG_NO_LOC("\tdaemonize: %s", config->daemonize ? "True" : "False");
	519	DBG_NO_LOC("\tsignal parent on start: %s", config->sig_parent ? "True" : "False");
	520	DBG_NO_LOC("\ttracing group name: %s", config->tracing_group_name.value ? : "Unknown");
	521	DBG_NO_LOC("\tkmod_probe_list: %s", config->kmod_probes_list.value ? : "None");
	522	DBG_NO_LOC("\tkmod_extra_probe_list: %s", config->kmod_extra_probes_list.value ? : "None");
	523	DBG_NO_LOC("\trundir: %s", config->rundir.value ? : "Unknown");
	524	DBG_NO_LOC("\tapplication socket path: %s", config->apps_unix_sock_path.value ? : "Unknown");
	525	DBG_NO_LOC("\tclient socket path: %s", config->client_unix_sock_path.value ? : "Unknown");
	526	DBG_NO_LOC("\twait shm path: %s", config->wait_shm_path.value ? : "Unknown");
	527	DBG_NO_LOC("\thealth socket path: %s", config->health_unix_sock_path.value ? : "Unknown");
	528	DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN: %s", config->lttng_ust_clock_plugin.value ? : "None");
	529	DBG_NO_LOC("\tpid file path: %s", config->pid_file_path.value ? : "Unknown");
	530	DBG_NO_LOC("\tlock file path: %s", config->lock_file_path.value ? : "Unknown");
	531	DBG_NO_LOC("\tsession load path: %s", config->load_session_path.value ? : "None");
	532	DBG_NO_LOC("\tagent port file path: %s", config->agent_port_file_path.value ? : "Unknown");
	533	DBG_NO_LOC("\tconsumerd32 path: %s", config->consumerd32_path.value ? : "Unknown");
	534	DBG_NO_LOC("\tconsumerd32 bin path: %s", config->consumerd32_bin_path.value ? : "Unknown");
	535	DBG_NO_LOC("\tconsumerd32 lib dir: %s", config->consumerd32_lib_dir.value ? : "Unknown");
	536	DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
	537	DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
	538	DBG_NO_LOC("\tconsumerd64 path: %s", config->consumerd64_path.value ? : "Unknown");
	539	DBG_NO_LOC("\tconsumerd64 bin path: %s", config->consumerd64_bin_path.value ? : "Unknown");
	540	DBG_NO_LOC("\tconsumerd64 lib dir: %s", config->consumerd64_lib_dir.value ? : "Unknown");
	541	DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
	542	DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
	543	DBG_NO_LOC("\tkconsumerd path: %s", config->kconsumerd_path.value ? : "Unknown");
	544	DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
	545	DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
e6142f2e	546	}