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

/*
 * Copyright (C) 2017 - 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.
 *
 * 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.
 */

#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 },
	.app_socket_timeout = 			DEFAULT_APP_SOCKET_RW_TIMEOUT,

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

	.tracing_group_name.value = 		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("\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 JG	1	/*
	2	* Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License, version 2 only,
	6	* as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#include "sessiond-config.h"
	19	#include <assert.h>
	20	#include "lttng-ust-ctl.h"
	21	#include <common/defaults.h>
	22	#include <limits.h>
	23	#include <errno.h>
	24	#include <ctype.h>
	25	#include <common/error.h>
	26	#include <common/utils.h>
	27	#include <common/compat/getenv.h>
	28
	29	static
	30	struct sessiond_config sessiond_config_build_defaults = {
	31	.quiet = false,
	32	.verbose = 0,
	33	.verbose_consumer = 0,
	34
2288467f	35	.agent_tcp_port = { .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
e6142f2e JG	36	.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT,
	37
	38	.no_kernel = false,
	39	.background = false,
	40	.daemonize = false,
	41	.sig_parent = false,
	42
	43	.tracing_group_name.value = DEFAULT_TRACING_GROUP,
	44	.kmod_probes_list.value = NULL,
	45	.kmod_extra_probes_list.value = NULL,
	46
	47	.rundir.value = NULL,
	48
	49	.apps_unix_sock_path.value = NULL,
	50	.client_unix_sock_path.value = NULL,
	51	.wait_shm_path.value = NULL,
	52	.health_unix_sock_path.value = NULL,
	53	.lttng_ust_clock_plugin.value = NULL,
	54	.pid_file_path.value = NULL,
	55	.lock_file_path.value = NULL,
	56	.agent_port_file_path.value = NULL,
	57	.load_session_path.value = NULL,
	58
	59	.consumerd32_path.value = NULL,
	60	.consumerd32_bin_path.value = NULL,
	61	.consumerd32_lib_dir.value = NULL,
	62	.consumerd32_err_unix_sock_path.value = NULL,
	63	.consumerd32_cmd_unix_sock_path.value = NULL,
	64
	65	.consumerd64_path.value = NULL,
	66	.consumerd64_bin_path.value = NULL,
	67	.consumerd64_lib_dir.value = NULL,
	68	.consumerd64_err_unix_sock_path.value = NULL,
	69	.consumerd64_cmd_unix_sock_path.value = NULL,
	70
	71	.kconsumerd_path.value = NULL,
	72	.kconsumerd_err_unix_sock_path.value = NULL,
	73	.kconsumerd_cmd_unix_sock_path.value = NULL,
	74	};
	75
	76	static
	77	void config_string_fini(struct config_string *str)
	78	{
	79	config_string_set(str, NULL);
	80	}
	81
	82	static
	83	void config_string_set_static(struct config_string *config_str,
	84	const char *value)
	85	{
	86	config_string_set(config_str, (char *) value);
	87	config_str->should_free = false;
	88	}
	89
	90	/* Only use for dynamically-allocated strings. */
	91	LTTNG_HIDDEN
	92	void config_string_set(struct config_string config_str, char value)
	93	{
	94	assert(config_str);
	95	if (config_str->should_free) {
	96	free(config_str->value);
	97	config_str->should_free = false;
	98	}
	99
100	config_str->should_free = !!value;
101	config_str->value = value;
102	}
103
104	LTTNG_HIDDEN
105	int sessiond_config_apply_env_config(struct sessiond_config *config)
106	{
107	int ret = 0;
108	const char *env_value;
109
110	env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
111	if (env_value) {
112	char *endptr;
113	long int_val;
114
115	errno = 0;
116	int_val = strtoul(env_value, &endptr, 0);
117	if (errno != 0 \|\| int_val > INT_MAX \|\|
118	(int_val < 0 && int_val != -1)) {
119	ERR("Invalid value \"%s\" used for \"%s\" environment variable",
120	env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
121	ret = -1;
122	goto end;
123	}
124
125	config->app_socket_timeout = int_val;
126	}
127
128	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
129	if (env_value) {
130	config_string_set_static(&config->consumerd32_bin_path,
131	env_value);
132	}
133	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
134	if (env_value) {
135	config_string_set_static(&config->consumerd64_bin_path,
136	env_value);
137	}
138
139	env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
140	if (env_value) {
141	config_string_set_static(&config->consumerd32_lib_dir,
142	env_value);
143	}
144	env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
145	if (env_value) {
146	config_string_set_static(&config->consumerd64_lib_dir,
147	env_value);
148	}
149
150	env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
151	if (env_value) {
152	config_string_set_static(&config->lttng_ust_clock_plugin,
153	env_value);
154	}
155
156	env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
157	if (env_value) {
158	config_string_set_static(&config->kmod_probes_list,
159	env_value);
160	}
161
162	env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
163	if (env_value) {
164	config_string_set_static(&config->kmod_extra_probes_list,
165	env_value);
166	}
167	end:
168	return ret;
169	}
170
171	static
172	int config_set_paths_root(struct sessiond_config *config)
173	{
174	int ret = 0;
175
176	config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
177	if (!config->rundir.value) {
178	ERR("Failed to set rundir");
179	ret = -1;
180	goto end;
181	}
182
183	config_string_set_static(&config->apps_unix_sock_path,
184	DEFAULT_GLOBAL_APPS_UNIX_SOCK);
185	config_string_set_static(&config->client_unix_sock_path,
186	DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
187	config_string_set_static(&config->wait_shm_path,
188	DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
189	config_string_set_static(&config->health_unix_sock_path,
190	DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
e6142f2e JG	191	end:
	192	return ret;
	193	}
	194
	195	static
	196	int config_set_paths_non_root(struct sessiond_config *config)
	197	{
	198	int ret = 0;
	199	const char *home_path = utils_get_home_dir();
	200	char *str;
	201
	202	if (home_path == NULL) {
	203	ERR("Can't get HOME directory for sockets creation.");
	204	ret = -1;
	205	goto end;
	206	}
	207
	208	/*
	209	* Create rundir from home path. This will create something like
	210	* $HOME/.lttng
	211	*/
	212	ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
	213	if (ret < 0) {
	214	ERR("Failed to set rundir");
	215	goto end;
	216	}
	217	config_string_set(&config->rundir, str);
	218	str = NULL;
	219
	220	ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
	221	if (ret < 0) {
	222	ERR("Failed to set default home apps unix socket path");
	223	goto end;
	224	}
	225	config_string_set(&config->apps_unix_sock_path, str);
	226	str = NULL;
	227
	228	ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
	229	if (ret < 0) {
	230	ERR("Failed to set default home client unix socket path");
	231	goto end;
	232	}
	233	config_string_set(&config->client_unix_sock_path, str);
	234	str = NULL;
	235
	236	ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
	237	if (ret < 0) {
	238	ERR("Failed to set default home apps wait shm path");
	239	goto end;
	240	}
	241	config_string_set(&config->wait_shm_path, str);
	242	str = NULL;
	243
	244	ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
	245	if (ret < 0) {
	246	ERR("Failed to set default home health UNIX socket path");
	247	goto end;
	248	}
	249	config_string_set(&config->health_unix_sock_path, str);
	250	str = NULL;
	251
	252	ret = 0;
	253	end:
	254	return ret;
255	}
256
257	LTTNG_HIDDEN
258	int sessiond_config_init(struct sessiond_config *config)
259	{
260	int ret;
261	bool is_root = (getuid() == 0);
262	char *str;
263
264	assert(config);
265	memcpy(config, &sessiond_config_build_defaults, sizeof(*config));
266
267	if (is_root) {
268	ret = config_set_paths_root(config);
269	} else {
270	ret = config_set_paths_non_root(config);
271	}
2a9f757b	272	if (ret < 0) {
c9a2957d	273	goto error;
2a9f757b	274	}
e6142f2e JG	275
	276	/* 32 bits consumerd path setup */
	277	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
	278	config->rundir.value);
	279	if (ret < 0) {
	280	ERR("Failed to set 32-bit consumer path");
c9a2957d	281	goto error;
e6142f2e JG	282	}
	283	config_string_set(&config->consumerd32_path, str);
	284	str = NULL;
	285
	286	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
	287	config->rundir.value);
	288	if (ret < 0) {
	289	ERR("Failed to set 32-bit consumer error socket path");
c9a2957d	290	goto error;
e6142f2e JG	291	}
	292	config_string_set(&config->consumerd32_err_unix_sock_path, str);
	293	str = NULL;
	294
	295	ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
	296	config->rundir.value);
	297	if (ret < 0) {
	298	ERR("Failed to set 32-bit consumer command socket path");
c9a2957d	299	goto error;
e6142f2e JG	300	}
	301	config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
	302	str = NULL;
	303
	304	/* 64 bits consumerd path setup */
	305	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
	306	config->rundir.value);
	307	if (ret < 0) {
	308	ERR("Failed to set 64-bit consumer path");
c9a2957d	309	goto error;
e6142f2e JG	310	}
	311	config_string_set(&config->consumerd64_path, str);
	312	str = NULL;
	313
	314	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
	315	config->rundir.value);
	316	if (ret < 0) {
	317	ERR("Failed to set 64-bit consumer error socket path");
c9a2957d	318	goto error;
e6142f2e JG	319	}
	320	config_string_set(&config->consumerd64_err_unix_sock_path, str);
	321	str = NULL;
	322
	323	ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
	324	config->rundir.value);
	325	if (ret < 0) {
	326	ERR("Failed to set 64-bit consumer command socket path");
c9a2957d	327	goto error;
e6142f2e JG	328	}
	329	config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
	330	str = NULL;
	331
	332	/* kconsumerd consumerd path setup */
	333	ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
	334	config->rundir.value);
	335	if (ret < 0) {
	336	ERR("Failed to set kernel consumer path");
c9a2957d	337	goto error;
e6142f2e JG	338	}
	339	config_string_set(&config->kconsumerd_path, str);
	340	str = NULL;
	341
4a08b740 JG	342	ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
	343	config->rundir.value);
	344	if (ret < 0) {
	345	ERR("Failed to set kernel consumer error socket path");
c9a2957d	346	goto error;
4a08b740 JG	347	}
	348	config_string_set(&config->kconsumerd_err_unix_sock_path, str);
	349	str = NULL;
	350
	351	ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
	352	config->rundir.value);
	353	if (ret < 0) {
	354	ERR("Failed to set kernel consumer command socket path");
c9a2957d	355	goto error;
4a08b740 JG	356	}
	357	config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
	358	str = NULL;
	359
e6142f2e JG	360	ret = asprintf(&str, "%s/%s", config->rundir.value,
	361	DEFAULT_LTTNG_SESSIOND_PIDFILE);
	362	if (ret < 0) {
	363	ERR("Failed to set PID file path");
c9a2957d	364	goto error;
e6142f2e JG	365	}
	366	config_string_set(&config->pid_file_path, str);
	367	str = NULL;
	368
	369	ret = asprintf(&str, "%s/%s", config->rundir.value,
	370	DEFAULT_LTTNG_SESSIOND_LOCKFILE);
	371	if (ret < 0) {
	372	ERR("Failed to set lock file path");
c9a2957d	373	goto error;
e6142f2e JG	374	}
	375	config_string_set(&config->lock_file_path, str);
	376	str = NULL;
	377
	378	ret = asprintf(&str, "%s/%s", config->rundir.value,
	379	DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
	380	if (ret < 0) {
	381	ERR("Failed to set agent port file path");
c9a2957d	382	goto error;
e6142f2e JG	383	}
	384	config_string_set(&config->agent_port_file_path, str);
	385	str = NULL;
	386
	387	/*
	388	* Allow INSTALL_BIN_PATH to be used as a target path for the
	389	* native architecture size consumer if CONFIG_CONSUMER*_PATH
	390	* has not been defined.
	391	*/
	392	#if (CAA_BITS_PER_LONG == 32)
	393	config_string_set_static(&config->consumerd32_bin_path,
	394	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	395	config_string_set_static(&config->consumerd32_lib_dir,
	396	INSTALL_LIB_PATH);
	397	#elif (CAA_BITS_PER_LONG == 64)
	398	config_string_set_static(&config->consumerd64_bin_path,
	399	INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
	400	config_string_set_static(&config->consumerd64_lib_dir,
	401	INSTALL_LIB_PATH);
	402	#else
	403	#error "Unknown bitness"
	404	#endif
	405	ret = 0;
c9a2957d JG	406	return ret;
	407	error:
	408	sessiond_config_fini(config);
e6142f2e JG	409	return ret;
	410	}
	411
	412	LTTNG_HIDDEN
	413	void sessiond_config_fini(struct sessiond_config *config)
	414	{
	415	config_string_fini(&config->tracing_group_name);
	416	config_string_fini(&config->kmod_probes_list);
	417	config_string_fini(&config->kmod_extra_probes_list);
129ee922	418	config_string_fini(&config->rundir);
e6142f2e JG	419	config_string_fini(&config->apps_unix_sock_path);
	420	config_string_fini(&config->client_unix_sock_path);
	421	config_string_fini(&config->wait_shm_path);
	422	config_string_fini(&config->health_unix_sock_path);
	423	config_string_fini(&config->lttng_ust_clock_plugin);
	424	config_string_fini(&config->pid_file_path);
	425	config_string_fini(&config->lock_file_path);
	426	config_string_fini(&config->load_session_path);
	427	config_string_fini(&config->agent_port_file_path);
	428	config_string_fini(&config->consumerd32_path);
	429	config_string_fini(&config->consumerd32_bin_path);
	430	config_string_fini(&config->consumerd32_lib_dir);
	431	config_string_fini(&config->consumerd32_err_unix_sock_path);
	432	config_string_fini(&config->consumerd32_cmd_unix_sock_path);
	433	config_string_fini(&config->consumerd64_path);
	434	config_string_fini(&config->consumerd64_bin_path);
	435	config_string_fini(&config->consumerd64_lib_dir);
	436	config_string_fini(&config->consumerd64_err_unix_sock_path);
	437	config_string_fini(&config->consumerd64_cmd_unix_sock_path);
	438	config_string_fini(&config->kconsumerd_path);
	439	config_string_fini(&config->kconsumerd_err_unix_sock_path);
	440	config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
	441	}
	442
	443	static
	444	int resolve_path(struct config_string *path)
	445	{
	446	int ret = 0;
	447	char *absolute_path;
	448
	449	if (!path->value \|\| path->value[0] == '/') {
	450	goto end;
	451	}
	452
	453	absolute_path = utils_expand_path(path->value);
	454	if (!absolute_path) {
	455	ret = -1;
	456	goto end;
	457	}
	458
	459	config_string_set(path, absolute_path);
	460	end:
	461	return ret;
	462	}
	463
	464	#define RESOLVE_CHECK(path_config_str) \
	465	if (resolve_path(path_config_str)) \
	466	return -1
	467
	468	LTTNG_HIDDEN
	469	int sessiond_config_resolve_paths(struct sessiond_config *config)
	470	{
	471	RESOLVE_CHECK(&config->apps_unix_sock_path);
	472	RESOLVE_CHECK(&config->client_unix_sock_path);
	473	RESOLVE_CHECK(&config->wait_shm_path);
	474	RESOLVE_CHECK(&config->health_unix_sock_path);
	475	RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
	476	RESOLVE_CHECK(&config->pid_file_path);
	477	RESOLVE_CHECK(&config->lock_file_path);
	478	RESOLVE_CHECK(&config->load_session_path);
	479	RESOLVE_CHECK(&config->agent_port_file_path);
	480	RESOLVE_CHECK(&config->consumerd32_path);
	481	RESOLVE_CHECK(&config->consumerd32_bin_path);
	482	RESOLVE_CHECK(&config->consumerd32_lib_dir);
483	RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
484	RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
485	RESOLVE_CHECK(&config->consumerd64_path);
486	RESOLVE_CHECK(&config->consumerd64_bin_path);
487	RESOLVE_CHECK(&config->consumerd64_lib_dir);
488	RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
489	RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
490	RESOLVE_CHECK(&config->kconsumerd_path);
491	RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
492	RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
493	return 0;
494	}
495
496	LTTNG_HIDDEN
497	void sessiond_config_log(struct sessiond_config *config)
498	{
499	DBG_NO_LOC("[sessiond configuration]");
2ca43cb1 JR	500	DBG_NO_LOC("\tverbose: %i", config->verbose);
	501	DBG_NO_LOC("\tverbose consumer: %i", config->verbose_consumer);
	502	DBG_NO_LOC("\tquiet mode: %s", config->quiet ? "True" : "False");
2288467f	503	if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
2ca43cb1	504	DBG_NO_LOC("\tagent_tcp_port: %i", config->agent_tcp_port.begin);
2288467f	505	} else {
2ca43cb1	506	DBG_NO_LOC("\tagent_tcp_port: [%i, %i]",
2288467f JG	507	config->agent_tcp_port.begin,
	508	config->agent_tcp_port.end);
	509	}
2ca43cb1 JR	510	DBG_NO_LOC("\tapplication socket timeout: %i", config->app_socket_timeout);
	511	DBG_NO_LOC("\tno-kernel: %s", config->no_kernel ? "True" : "False");
	512	DBG_NO_LOC("\tbackground: %s", config->background ? "True" : "False");
	513	DBG_NO_LOC("\tdaemonize: %s", config->daemonize ? "True" : "False");
	514	DBG_NO_LOC("\tsignal parent on start: %s", config->sig_parent ? "True" : "False");
	515	DBG_NO_LOC("\ttracing group name: %s", config->tracing_group_name.value ? : "Unknown");
	516	DBG_NO_LOC("\tkmod_probe_list: %s", config->kmod_probes_list.value ? : "None");
	517	DBG_NO_LOC("\tkmod_extra_probe_list: %s", config->kmod_extra_probes_list.value ? : "None");
	518	DBG_NO_LOC("\trundir: %s", config->rundir.value ? : "Unknown");
	519	DBG_NO_LOC("\tapplication socket path: %s", config->apps_unix_sock_path.value ? : "Unknown");
	520	DBG_NO_LOC("\tclient socket path: %s", config->client_unix_sock_path.value ? : "Unknown");
	521	DBG_NO_LOC("\twait shm path: %s", config->wait_shm_path.value ? : "Unknown");
	522	DBG_NO_LOC("\thealth socket path: %s", config->health_unix_sock_path.value ? : "Unknown");
	523	DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN: %s", config->lttng_ust_clock_plugin.value ? : "None");
	524	DBG_NO_LOC("\tpid file path: %s", config->pid_file_path.value ? : "Unknown");
	525	DBG_NO_LOC("\tlock file path: %s", config->lock_file_path.value ? : "Unknown");
	526	DBG_NO_LOC("\tsession load path: %s", config->load_session_path.value ? : "None");
	527	DBG_NO_LOC("\tagent port file path: %s", config->agent_port_file_path.value ? : "Unknown");
	528	DBG_NO_LOC("\tconsumerd32 path: %s", config->consumerd32_path.value ? : "Unknown");
	529	DBG_NO_LOC("\tconsumerd32 bin path: %s", config->consumerd32_bin_path.value ? : "Unknown");
	530	DBG_NO_LOC("\tconsumerd32 lib dir: %s", config->consumerd32_lib_dir.value ? : "Unknown");
	531	DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
	532	DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
	533	DBG_NO_LOC("\tconsumerd64 path: %s", config->consumerd64_path.value ? : "Unknown");
	534	DBG_NO_LOC("\tconsumerd64 bin path: %s", config->consumerd64_bin_path.value ? : "Unknown");
	535	DBG_NO_LOC("\tconsumerd64 lib dir: %s", config->consumerd64_lib_dir.value ? : "Unknown");
	536	DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
	537	DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
	538	DBG_NO_LOC("\tkconsumerd path: %s", config->kconsumerd_path.value ? : "Unknown");
	539	DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
	540	DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
e6142f2e	541	}