cfg.c
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cfg.c
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	/*
	* Copyright (c) 2005-2006 MontaVista Software, Inc.
	* Copyright (c) 2006-2009 Red Hat, Inc.
	*
	* All rights reserved.
	*
	* Author: Steven Dake (sdake@redhat.com)
	*
	* This software licensed under BSD license, the text of which follows:
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* - Redistributions of source code must retain the above copyright notice,
	* this list of conditions and the following disclaimer.
	* - Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	* - Neither the name of the MontaVista Software, Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from this
	* software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include <config.h>

	#include <sys/types.h>
	#include <sys/uio.h>
	#include <sys/socket.h>
	#include <sys/un.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>
	#include <unistd.h>
	#include <fcntl.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <limits.h>
	#include <errno.h>
	#include <string.h>

	#include <corosync/corotypes.h>
	#include <corosync/coroipc_types.h>
	#include <corosync/cfg.h>
	#include <corosync/list.h>
	#include <corosync/mar_gen.h>
	#include <corosync/totem/totemip.h>
	#include <corosync/totem/totem.h>
	#include <corosync/ipc_cfg.h>
	#include <corosync/lcr/lcr_comp.h>
	#include <corosync/engine/logsys.h>
	#include <corosync/engine/coroapi.h>
	#include <corosync/corodefs.h>

	LOGSYS_DECLARE_SUBSYS ("CFG");

	enum cfg_message_req_types {
	MESSAGE_REQ_EXEC_CFG_RINGREENABLE = 0,
	MESSAGE_REQ_EXEC_CFG_KILLNODE = 1,
	MESSAGE_REQ_EXEC_CFG_SHUTDOWN = 2,
	MESSAGE_REQ_EXEC_CFG_CRYPTO_SET = 3
	};

	#define DEFAULT_SHUTDOWN_TIMEOUT 5

	static struct list_head trackers_list;

	/*
	* Variables controlling a requested shutdown
	*/
	static corosync_timer_handle_t shutdown_timer;
	static struct cfg_info *shutdown_con;
	static uint32_t shutdown_flags;
	static int shutdown_yes;
	static int shutdown_no;
	static int shutdown_expected;

	struct cfg_info
	{
	struct list_head list;
	void *conn;
	void *tracker_conn;
	enum {SHUTDOWN_REPLY_UNKNOWN, SHUTDOWN_REPLY_YES, SHUTDOWN_REPLY_NO} shutdown_reply;
	};

	static void cfg_confchg_fn (
	enum totem_configuration_type configuration_type,
	const unsigned int *member_list, size_t member_list_entries,
	const unsigned int *left_list, size_t left_list_entries,
	const unsigned int *joined_list, size_t joined_list_entries,
	const struct memb_ring_id *ring_id);

	static int cfg_exec_init_fn (struct corosync_api_v1 *corosync_api_v1);

	static struct corosync_api_v1 *api;

	static int cfg_lib_init_fn (void *conn);

	static int cfg_lib_exit_fn (void *conn);

	static void message_handler_req_exec_cfg_ringreenable (
	const void *message,
	unsigned int nodeid);

	static void message_handler_req_exec_cfg_killnode (
	const void *message,
	unsigned int nodeid);

	static void message_handler_req_exec_cfg_shutdown (
	const void *message,
	unsigned int nodeid);

	static void message_handler_req_exec_cfg_crypto_set (
	const void *message,
	unsigned int nodeid);

	static void exec_cfg_killnode_endian_convert (void *msg);

	static void message_handler_req_lib_cfg_ringstatusget (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_ringreenable (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_statetrack (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_statetrackstop (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_administrativestateset (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_administrativestateget (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_serviceload (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_serviceunload (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_killnode (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_tryshutdown (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_replytoshutdown (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_get_node_addrs (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_local_get (
	void *conn,
	const void *msg);

	static void message_handler_req_lib_cfg_crypto_set (
	void *conn,
	const void *msg);

	/*
	* Service Handler Definition
	*/
	static struct corosync_lib_handler cfg_lib_engine[] =
	{
	{ /* 0 */
	.lib_handler_fn = message_handler_req_lib_cfg_ringstatusget,
	.flow_control = CS_LIB_FLOW_CONTROL_REQUIRED
	},
	{ /* 1 */
	.lib_handler_fn = message_handler_req_lib_cfg_ringreenable,
	.flow_control = CS_LIB_FLOW_CONTROL_REQUIRED
	},
	{ /* 2 */
	.lib_handler_fn = message_handler_req_lib_cfg_statetrack,
	.flow_control = CS_LIB_FLOW_CONTROL_REQUIRED
	},
	{ /* 3 */
	.lib_handler_fn = message_handler_req_lib_cfg_statetrackstop,
	.flow_control = CS_LIB_FLOW_CONTROL_REQUIRED
	},
	{ /* 4 */
	.lib_handler_fn = message_handler_req_lib_cfg_administrativestateset,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 5 */
	.lib_handler_fn = message_handler_req_lib_cfg_administrativestateget,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 6 */
	.lib_handler_fn = message_handler_req_lib_cfg_serviceload,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 7 */
	.lib_handler_fn = message_handler_req_lib_cfg_serviceunload,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 8 */
	.lib_handler_fn = message_handler_req_lib_cfg_killnode,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 9 */
	.lib_handler_fn = message_handler_req_lib_cfg_tryshutdown,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 10 */
	.lib_handler_fn = message_handler_req_lib_cfg_replytoshutdown,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 11 */
	.lib_handler_fn = message_handler_req_lib_cfg_get_node_addrs,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 12 */
	.lib_handler_fn = message_handler_req_lib_cfg_local_get,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	},
	{ /* 13 */
	.lib_handler_fn = message_handler_req_lib_cfg_crypto_set,
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED
	}
	};

	static struct corosync_exec_handler cfg_exec_engine[] =
	{
	{ /* 0 */
	.exec_handler_fn = message_handler_req_exec_cfg_ringreenable,
	},
	{ /* 1 */
	.exec_handler_fn = message_handler_req_exec_cfg_killnode,
	.exec_endian_convert_fn = exec_cfg_killnode_endian_convert
	},
	{ /* 2 */
	.exec_handler_fn = message_handler_req_exec_cfg_shutdown,
	},
	{ /* 3 */
	.exec_handler_fn = message_handler_req_exec_cfg_crypto_set,
	}
	};

	/*
	* Exports the interface for the service
	*/
	struct corosync_service_engine cfg_service_engine = {
	.name = "corosync configuration service",
	.id = CFG_SERVICE,
	.priority = 1,
	.private_data_size = sizeof(struct cfg_info),
	.flow_control = CS_LIB_FLOW_CONTROL_NOT_REQUIRED,
	.allow_inquorate = CS_LIB_ALLOW_INQUORATE,
	.lib_init_fn = cfg_lib_init_fn,
	.lib_exit_fn = cfg_lib_exit_fn,
	.lib_engine = cfg_lib_engine,
	.lib_engine_count = sizeof (cfg_lib_engine) / sizeof (struct corosync_lib_handler),
	.exec_init_fn = cfg_exec_init_fn,
	.exec_engine = cfg_exec_engine,
	.exec_engine_count = 0, /* sizeof (cfg_aisexec_handler_fns) / sizeof (coroync_exec_handler), */
	.confchg_fn = cfg_confchg_fn,
	};

	/*
	* Dynamic Loader definition
	*/
	static struct corosync_service_engine *cfg_get_service_engine_ver0 (void);

	static struct corosync_service_engine_iface_ver0 cfg_service_engine_iface = {
	.corosync_get_service_engine_ver0 = cfg_get_service_engine_ver0
	};

	static struct lcr_iface corosync_cfg_ver0[1] = {
	{
	.name = "corosync_cfg",
	.version = 0,
	.versions_replace = 0,
	.versions_replace_count = 0,
	.dependencies = 0,
	.dependency_count = 0,
	.constructor = NULL,
	.destructor = NULL,
	.interfaces = NULL
	}
	};

	static struct lcr_comp cfg_comp_ver0 = {
	.iface_count = 1,
	.ifaces = corosync_cfg_ver0
	};

	static struct corosync_service_engine *cfg_get_service_engine_ver0 (void)
	{
	return (&cfg_service_engine);
	}

	#ifdef COROSYNC_SOLARIS
	void corosync_lcr_component_register (void);

	void corosync_lcr_component_register (void) {
	#else
	__attribute__ ((constructor)) static void corosync_lcr_component_register (void) {
	#endif
	lcr_interfaces_set (&corosync_cfg_ver0[0], &cfg_service_engine_iface);

	lcr_component_register (&cfg_comp_ver0);
	}

	struct req_exec_cfg_ringreenable {
	coroipc_request_header_t header __attribute__((aligned(8)));
	mar_message_source_t source __attribute__((aligned(8)));
	};

	struct req_exec_cfg_killnode {
	coroipc_request_header_t header __attribute__((aligned(8)));
	mar_uint32_t nodeid __attribute__((aligned(8)));
	mar_name_t reason __attribute__((aligned(8)));
	};

	struct req_exec_cfg_crypto_set {
	coroipc_request_header_t header __attribute__((aligned(8)));
	mar_uint32_t type __attribute__((aligned(8)));
	};

	struct req_exec_cfg_shutdown {
	coroipc_request_header_t header __attribute__((aligned(8)));
	};

	/* IMPL */

	static int cfg_exec_init_fn (
	struct corosync_api_v1 *corosync_api_v1)
	{
	api = corosync_api_v1;

	list_init(&trackers_list);
	return (0);
	}

	static void cfg_confchg_fn (
	enum totem_configuration_type configuration_type,
	const unsigned int *member_list, size_t member_list_entries,
	const unsigned int *left_list, size_t left_list_entries,
	const unsigned int *joined_list, size_t joined_list_entries,
	const struct memb_ring_id *ring_id)
	{
	}

	/*
	* Tell other nodes we are shutting down
	*/
	static int send_shutdown(void)
	{
	struct req_exec_cfg_shutdown req_exec_cfg_shutdown;
	struct iovec iovec;

	ENTER();
	req_exec_cfg_shutdown.header.size =
	sizeof (struct req_exec_cfg_shutdown);
	req_exec_cfg_shutdown.header.id = SERVICE_ID_MAKE (CFG_SERVICE,
	MESSAGE_REQ_EXEC_CFG_SHUTDOWN);

	iovec.iov_base = (char *)&req_exec_cfg_shutdown;
	iovec.iov_len = sizeof (struct req_exec_cfg_shutdown);

	assert (api->totem_mcast (&iovec, 1, TOTEM_SAFE) == 0);

	LEAVE();
	return 0;
	}

	static void send_test_shutdown(void only_conn, void exclude_conn, int status)
	{
	struct res_lib_cfg_testshutdown res_lib_cfg_testshutdown;
	struct list_head *iter;

	ENTER();
	res_lib_cfg_testshutdown.header.size = sizeof(struct res_lib_cfg_testshutdown);
	res_lib_cfg_testshutdown.header.id = MESSAGE_RES_CFG_TESTSHUTDOWN;
	res_lib_cfg_testshutdown.header.error = status;
	res_lib_cfg_testshutdown.flags = shutdown_flags;

	if (only_conn) {
	TRACE1("sending testshutdown to only %p", only_conn);
	api->ipc_dispatch_send(only_conn, &res_lib_cfg_testshutdown,
	sizeof(res_lib_cfg_testshutdown));
	} else {
	for (iter = trackers_list.next; iter != &trackers_list; iter = iter->next) {
	struct cfg_info *ci = list_entry(iter, struct cfg_info, list);

	if (ci->conn != exclude_conn) {
	TRACE1("sending testshutdown to %p", ci->tracker_conn);
	api->ipc_dispatch_send(ci->tracker_conn, &res_lib_cfg_testshutdown,
	sizeof(res_lib_cfg_testshutdown));
	}
	}
	}
	LEAVE();
	}

	static void check_shutdown_status(void)
	{
	ENTER();

	/*
	* Shutdown client might have gone away
	*/
	if (!shutdown_con) {
	LEAVE();
	return;
	}

	/*
	* All replies safely gathered in ?
	*/
	if (shutdown_yes + shutdown_no >= shutdown_expected) {
	struct res_lib_cfg_tryshutdown res_lib_cfg_tryshutdown;

	api->timer_delete(shutdown_timer);

	if (shutdown_yes >= shutdown_expected \|\|
	shutdown_flags == CFG_SHUTDOWN_FLAG_REGARDLESS) {
	TRACE1("shutdown confirmed");

	res_lib_cfg_tryshutdown.header.size = sizeof(struct res_lib_cfg_tryshutdown);
	res_lib_cfg_tryshutdown.header.id = MESSAGE_RES_CFG_TRYSHUTDOWN;
	res_lib_cfg_tryshutdown.header.error = CS_OK;

	/*
	* Tell originator that shutdown was confirmed
	*/
	api->ipc_response_send(shutdown_con->conn, &res_lib_cfg_tryshutdown,
	sizeof(res_lib_cfg_tryshutdown));
	shutdown_con = NULL;

	/*
	* Tell other nodes we are going down
	*/
	send_shutdown();

	}
	else {

	TRACE1("shutdown cancelled");
	res_lib_cfg_tryshutdown.header.size = sizeof(struct res_lib_cfg_tryshutdown);
	res_lib_cfg_tryshutdown.header.id = MESSAGE_RES_CFG_TRYSHUTDOWN;
	res_lib_cfg_tryshutdown.header.error = CS_ERR_BUSY;

	/*
	* Tell originator that shutdown was cancelled
	*/
	api->ipc_response_send(shutdown_con->conn, &res_lib_cfg_tryshutdown,
	sizeof(res_lib_cfg_tryshutdown));
	shutdown_con = NULL;
	}

	log_printf(LOGSYS_LEVEL_DEBUG, "shutdown decision is: (yes count: %d, no count: %d) flags=%x\n", shutdown_yes, shutdown_no, shutdown_flags);
	}
	LEAVE();
	}


	/*
	* Not all nodes responded to the shutdown (in time)
	*/
	static void shutdown_timer_fn(void *arg)
	{
	ENTER();

	/*
	* Mark undecideds as "NO"
	*/
	shutdown_no = shutdown_expected;
	check_shutdown_status();

	send_test_shutdown(NULL, NULL, CS_ERR_TIMEOUT);
	LEAVE();
	}

	static void remove_ci_from_shutdown(struct cfg_info *ci)
	{
	ENTER();

	/*
	* If the controlling shutdown process has quit, then cancel the
	* shutdown session
	*/
	if (ci == shutdown_con) {
	shutdown_con = NULL;
	api->timer_delete(shutdown_timer);
	}

	if (!list_empty(&ci->list)) {
	list_del(&ci->list);
	list_init(&ci->list);

	/*
	* Remove our option
	*/
	if (shutdown_con) {
	if (ci->shutdown_reply == SHUTDOWN_REPLY_YES)
	shutdown_yes--;
	if (ci->shutdown_reply == SHUTDOWN_REPLY_NO)
	shutdown_no--;
	}

	/*
	* If we are leaving, then that's an implicit YES to shutdown
	*/
	ci->shutdown_reply = SHUTDOWN_REPLY_YES;
	shutdown_yes++;

	check_shutdown_status();
	}
	LEAVE();
	}


	int cfg_lib_exit_fn (void *conn)
	{
	struct cfg_info ci = (struct cfg_info )api->ipc_private_data_get (conn);

	ENTER();
	if (!list_empty(&ci->list)) {
	list_del(&ci->list);
	remove_ci_from_shutdown(ci);
	}
	LEAVE();
	return (0);
	}

	static int cfg_lib_init_fn (void *conn)
	{
	struct cfg_info ci = (struct cfg_info )api->ipc_private_data_get (conn);

	ENTER();
	list_init(&ci->list);
	LEAVE();

	return (0);
	}

	/*
	* Executive message handlers
	*/
	static void message_handler_req_exec_cfg_ringreenable (
	const void *message,
	unsigned int nodeid)
	{
	const struct req_exec_cfg_ringreenable *req_exec_cfg_ringreenable
	= message;
	struct res_lib_cfg_ringreenable res_lib_cfg_ringreenable;

	ENTER();
	api->totem_ring_reenable ();
	if (api->ipc_source_is_local(&req_exec_cfg_ringreenable->source)) {
	res_lib_cfg_ringreenable.header.id = MESSAGE_RES_CFG_RINGREENABLE;
	res_lib_cfg_ringreenable.header.size = sizeof (struct res_lib_cfg_ringreenable);
	res_lib_cfg_ringreenable.header.error = CS_OK;
	api->ipc_response_send (
	req_exec_cfg_ringreenable->source.conn,
	&res_lib_cfg_ringreenable,
	sizeof (struct res_lib_cfg_ringreenable));
	}
	LEAVE();
	}

	static void exec_cfg_killnode_endian_convert (void *msg)
	{
	struct req_exec_cfg_killnode *req_exec_cfg_killnode =
	(struct req_exec_cfg_killnode *)msg;
	ENTER();

	swab_mar_name_t(&req_exec_cfg_killnode->reason);
	LEAVE();
	}


	static void message_handler_req_exec_cfg_killnode (
	const void *message,
	unsigned int nodeid)
	{
	const struct req_exec_cfg_killnode *req_exec_cfg_killnode = message;
	cs_name_t reason;

	ENTER();
	log_printf(LOGSYS_LEVEL_DEBUG, "request to kill node %d(us=%d): %s\n", req_exec_cfg_killnode->nodeid, api->totem_nodeid_get(), reason.value);
	if (req_exec_cfg_killnode->nodeid == api->totem_nodeid_get()) {
	marshall_from_mar_name_t(&reason, &req_exec_cfg_killnode->reason);
	log_printf(LOGSYS_LEVEL_NOTICE, "Killed by node %d: %s\n",
	nodeid, reason.value);
	corosync_fatal_error(COROSYNC_FATAL_ERROR_EXIT);
	}
	LEAVE();
	}

	/*
	* Self shutdown
	*/
	static void message_handler_req_exec_cfg_shutdown (
	const void *message,
	unsigned int nodeid)
	{
	ENTER();

	log_printf(LOGSYS_LEVEL_NOTICE, "Node %d was shut down by sysadmin\n", nodeid);
	if (nodeid == api->totem_nodeid_get()) {
	api->request_shutdown();
	}
	LEAVE();
	}

	static void message_handler_req_exec_cfg_crypto_set (
	const void *message,
	unsigned int nodeid)
	{
	const struct req_exec_cfg_crypto_set *req_exec_cfg_crypto_set = message;
	ENTER();

	log_printf(LOGSYS_LEVEL_NOTICE, "Node %d requested set crypto to %d\n", nodeid, req_exec_cfg_crypto_set->type);

	api->totem_crypto_set(req_exec_cfg_crypto_set->type);
	LEAVE();
	}


	/*
	* Library Interface Implementation
	*/
	static void message_handler_req_lib_cfg_ringstatusget (
	void *conn,
	const void *msg)
	{
	struct res_lib_cfg_ringstatusget res_lib_cfg_ringstatusget;
	struct totem_ip_address interfaces[INTERFACE_MAX];
	unsigned int iface_count;
	char **status;
	const char *totem_ip_string;
	unsigned int i;

	ENTER();

	res_lib_cfg_ringstatusget.header.id = MESSAGE_RES_CFG_RINGSTATUSGET;
	res_lib_cfg_ringstatusget.header.size = sizeof (struct res_lib_cfg_ringstatusget);
	res_lib_cfg_ringstatusget.header.error = CS_OK;

	api->totem_ifaces_get (
	api->totem_nodeid_get(),
	interfaces,
	&status,
	&iface_count);

	res_lib_cfg_ringstatusget.interface_count = iface_count;

	for (i = 0; i < iface_count; i++) {
	totem_ip_string
	= (const char *)api->totem_ip_print (&interfaces[i]);
	strcpy ((char *)&res_lib_cfg_ringstatusget.interface_status[i],
	status[i]);
	strcpy ((char *)&res_lib_cfg_ringstatusget.interface_name[i],
	totem_ip_string);
	}
	api->ipc_response_send (
	conn,
	&res_lib_cfg_ringstatusget,
	sizeof (struct res_lib_cfg_ringstatusget));

	LEAVE();
	}

	static void message_handler_req_lib_cfg_ringreenable (
	void *conn,
	const void *msg)
	{
	struct req_exec_cfg_ringreenable req_exec_cfg_ringreenable;
	struct iovec iovec;

	ENTER();
	req_exec_cfg_ringreenable.header.size =
	sizeof (struct req_exec_cfg_ringreenable);
	req_exec_cfg_ringreenable.header.id = SERVICE_ID_MAKE (CFG_SERVICE,
	MESSAGE_REQ_EXEC_CFG_RINGREENABLE);
	api->ipc_source_set (&req_exec_cfg_ringreenable.source, conn);

	iovec.iov_base = (char *)&req_exec_cfg_ringreenable;
	iovec.iov_len = sizeof (struct req_exec_cfg_ringreenable);

	assert (api->totem_mcast (&iovec, 1, TOTEM_SAFE) == 0);

	LEAVE();
	}

	static void message_handler_req_lib_cfg_statetrack (
	void *conn,
	const void *msg)
	{
	struct cfg_info ci = (struct cfg_info )api->ipc_private_data_get (conn);
	struct res_lib_cfg_statetrack res_lib_cfg_statetrack;

	ENTER();

	/*
	* We only do shutdown tracking at the moment
	*/
	if (list_empty(&ci->list)) {
	list_add(&ci->list, &trackers_list);
	ci->tracker_conn = conn;

	if (shutdown_con) {
	/*
	* Shutdown already in progress, ask the newcomer's opinion
	*/
	ci->shutdown_reply = SHUTDOWN_REPLY_UNKNOWN;
	shutdown_expected++;
	send_test_shutdown(conn, NULL, CS_OK);
	}
	}

	res_lib_cfg_statetrack.header.size = sizeof(struct res_lib_cfg_statetrack);
	res_lib_cfg_statetrack.header.id = MESSAGE_RES_CFG_STATETRACKSTART;
	res_lib_cfg_statetrack.header.error = CS_OK;

	api->ipc_response_send(conn, &res_lib_cfg_statetrack,
	sizeof(res_lib_cfg_statetrack));

	LEAVE();
	}

	static void message_handler_req_lib_cfg_statetrackstop (
	void *conn,
	const void *msg)
	{
	struct cfg_info ci = (struct cfg_info )api->ipc_private_data_get (conn);
	// struct req_lib_cfg_statetrackstop req_lib_cfg_statetrackstop = (struct req_lib_cfg_statetrackstop )message;

	ENTER();
	remove_ci_from_shutdown(ci);
	LEAVE();
	}

	static void message_handler_req_lib_cfg_administrativestateset (
	void *conn,
	const void *msg)
	{
	// struct req_lib_cfg_administrativestateset req_lib_cfg_administrativestateset = (struct req_lib_cfg_administrativestateset )message;

	ENTER();
	LEAVE();
	}
	static void message_handler_req_lib_cfg_administrativestateget (
	void *conn,
	const void *msg)
	{
	// struct req_lib_cfg_administrativestateget req_lib_cfg_administrativestateget = (struct req_lib_cfg_administrativestateget )message;
	ENTER();
	LEAVE();
	}

	static void message_handler_req_lib_cfg_serviceload (
	void *conn,
	const void *msg)
	{
	const struct req_lib_cfg_serviceload *req_lib_cfg_serviceload = msg;
	struct res_lib_cfg_serviceload res_lib_cfg_serviceload;

	ENTER();
	api->service_link_and_init (
	api,
	(const char *)req_lib_cfg_serviceload->service_name,
	req_lib_cfg_serviceload->service_ver);

	res_lib_cfg_serviceload.header.id = MESSAGE_RES_CFG_SERVICEUNLOAD;
	res_lib_cfg_serviceload.header.size = sizeof (struct res_lib_cfg_serviceload);
	res_lib_cfg_serviceload.header.error = CS_OK;
	api->ipc_response_send (
	conn,
	&res_lib_cfg_serviceload,
	sizeof (struct res_lib_cfg_serviceload));
	LEAVE();
	}

	static void message_handler_req_lib_cfg_serviceunload (
	void *conn,
	const void *msg)
	{
	const struct req_lib_cfg_serviceunload *req_lib_cfg_serviceunload = msg;
	struct res_lib_cfg_serviceunload res_lib_cfg_serviceunload;

	ENTER();
	api->service_unlink_and_exit (
	api,
	(const char *)req_lib_cfg_serviceunload->service_name,
	req_lib_cfg_serviceunload->service_ver);
	res_lib_cfg_serviceunload.header.id = MESSAGE_RES_CFG_SERVICEUNLOAD;
	res_lib_cfg_serviceunload.header.size = sizeof (struct res_lib_cfg_serviceunload);
	res_lib_cfg_serviceunload.header.error = CS_OK;
	api->ipc_response_send (
	conn,
	&res_lib_cfg_serviceunload,
	sizeof (struct res_lib_cfg_serviceunload));
	LEAVE();
	}


	static void message_handler_req_lib_cfg_killnode (
	void *conn,
	const void *msg)
	{
	const struct req_lib_cfg_killnode *req_lib_cfg_killnode = msg;
	struct res_lib_cfg_killnode res_lib_cfg_killnode;
	struct req_exec_cfg_killnode req_exec_cfg_killnode;
	struct iovec iovec;
	int res;

	ENTER();
	req_exec_cfg_killnode.header.size =
	sizeof (struct req_exec_cfg_killnode);
	req_exec_cfg_killnode.header.id = SERVICE_ID_MAKE (CFG_SERVICE,
	MESSAGE_REQ_EXEC_CFG_KILLNODE);
	req_exec_cfg_killnode.nodeid = req_lib_cfg_killnode->nodeid;
	marshall_to_mar_name_t(&req_exec_cfg_killnode.reason, &req_lib_cfg_killnode->reason);

	iovec.iov_base = (char *)&req_exec_cfg_killnode;
	iovec.iov_len = sizeof (struct req_exec_cfg_killnode);

	res = api->totem_mcast (&iovec, 1, TOTEM_SAFE);

	res_lib_cfg_killnode.header.size = sizeof(struct res_lib_cfg_killnode);
	res_lib_cfg_killnode.header.id = MESSAGE_RES_CFG_KILLNODE;
	res_lib_cfg_killnode.header.error = CS_OK;

	api->ipc_response_send(conn, &res_lib_cfg_killnode,
	sizeof(res_lib_cfg_killnode));

	LEAVE();
	}


	static void message_handler_req_lib_cfg_tryshutdown (
	void *conn,
	const void *msg)
	{
	struct cfg_info ci = (struct cfg_info )api->ipc_private_data_get (conn);
	const struct req_lib_cfg_tryshutdown *req_lib_cfg_tryshutdown = msg;
	struct list_head *iter;

	ENTER();

	if (req_lib_cfg_tryshutdown->flags == CFG_SHUTDOWN_FLAG_IMMEDIATE) {
	struct res_lib_cfg_tryshutdown res_lib_cfg_tryshutdown;

	/*
	* Tell other nodes
	*/
	send_shutdown();

	res_lib_cfg_tryshutdown.header.size = sizeof(struct res_lib_cfg_tryshutdown);
	res_lib_cfg_tryshutdown.header.id = MESSAGE_RES_CFG_TRYSHUTDOWN;
	res_lib_cfg_tryshutdown.header.error = CS_OK;
	api->ipc_response_send(conn, &res_lib_cfg_tryshutdown,
	sizeof(res_lib_cfg_tryshutdown));

	LEAVE();
	return;
	}

	/*
	* Shutdown in progress, return an error
	*/
	if (shutdown_con) {
	struct res_lib_cfg_tryshutdown res_lib_cfg_tryshutdown;

	res_lib_cfg_tryshutdown.header.size = sizeof(struct res_lib_cfg_tryshutdown);
	res_lib_cfg_tryshutdown.header.id = MESSAGE_RES_CFG_TRYSHUTDOWN;
	res_lib_cfg_tryshutdown.header.error = CS_ERR_EXIST;

	api->ipc_response_send(conn, &res_lib_cfg_tryshutdown,
	sizeof(res_lib_cfg_tryshutdown));


	LEAVE();

	return;
	}

	ci->conn = conn;
	shutdown_con = (struct cfg_info *)api->ipc_private_data_get (conn);
	shutdown_flags = req_lib_cfg_tryshutdown->flags;
	shutdown_yes = 0;
	shutdown_no = 0;

	/*
	* Count the number of listeners
	*/
	shutdown_expected = 0;

	for (iter = trackers_list.next; iter != &trackers_list; iter = iter->next) {
	struct cfg_info *testci = list_entry(iter, struct cfg_info, list);
	/*
	* It is assumed that we will allow shutdown
	*/
	if (testci != ci) {
	testci->shutdown_reply = SHUTDOWN_REPLY_UNKNOWN;
	shutdown_expected++;
	}
	}

	/*
	* If no-one is listening for events then we can just go down now
	*/
	if (shutdown_expected == 0) {
	struct res_lib_cfg_tryshutdown res_lib_cfg_tryshutdown;

	res_lib_cfg_tryshutdown.header.size = sizeof(struct res_lib_cfg_tryshutdown);
	res_lib_cfg_tryshutdown.header.id = MESSAGE_RES_CFG_TRYSHUTDOWN;
	res_lib_cfg_tryshutdown.header.error = CS_OK;

	/*
	* Tell originator that shutdown was confirmed
	*/
	api->ipc_response_send(conn, &res_lib_cfg_tryshutdown,
	sizeof(res_lib_cfg_tryshutdown));

	send_shutdown();
	LEAVE();
	return;
	}
	else {
	hdb_handle_t cfg_handle;
	hdb_handle_t find_handle;
	char *timeout_str;
	unsigned int shutdown_timeout = DEFAULT_SHUTDOWN_TIMEOUT;

	/*
	* Look for a shutdown timeout in objdb
	*/
	api->object_find_create(OBJECT_PARENT_HANDLE, "cfg", strlen("cfg"), &find_handle);
	api->object_find_next(find_handle, &cfg_handle);
	api->object_find_destroy(find_handle);

	if (cfg_handle) {
	if ( !api->object_key_get(cfg_handle,
	"shutdown_timeout",
	strlen("shutdown_timeout"),
	(void *)&timeout_str,
	NULL)) {
	shutdown_timeout = atoi(timeout_str);
	}
	}

	/*
	* Start the timer. If we don't get a full set of replies before this goes
	* off we'll cancel the shutdown
	*/
	api->timer_add_duration((unsigned long long)shutdown_timeout*1000000000, NULL,
	shutdown_timer_fn, &shutdown_timer);

	/*
	* Tell the users we would like to shut down
	*/
	send_test_shutdown(NULL, conn, CS_OK);
	}

	/*
	* We don't sent a reply to the caller here.
	* We send it when we know if we can shut down or not
	*/

	LEAVE();
	}

	static void message_handler_req_lib_cfg_replytoshutdown (
	void *conn,
	const void *msg)
	{
	struct cfg_info ci = (struct cfg_info )api->ipc_private_data_get (conn);
	const struct req_lib_cfg_replytoshutdown *req_lib_cfg_replytoshutdown = msg;
	struct res_lib_cfg_replytoshutdown res_lib_cfg_replytoshutdown;
	int status = CS_OK;

	ENTER();
	if (!shutdown_con) {
	status = CS_ERR_ACCESS;
	goto exit_fn;
	}

	if (req_lib_cfg_replytoshutdown->response) {
	shutdown_yes++;
	ci->shutdown_reply = SHUTDOWN_REPLY_YES;
	}
	else {
	shutdown_no++;
	ci->shutdown_reply = SHUTDOWN_REPLY_NO;
	}
	check_shutdown_status();

	exit_fn:
	res_lib_cfg_replytoshutdown.header.error = status;
	res_lib_cfg_replytoshutdown.header.id = MESSAGE_RES_CFG_REPLYTOSHUTDOWN;
	res_lib_cfg_replytoshutdown.header.size = sizeof(res_lib_cfg_replytoshutdown);

	api->ipc_response_send(conn, &res_lib_cfg_replytoshutdown,
	sizeof(res_lib_cfg_replytoshutdown));

	LEAVE();
	}

	static void message_handler_req_lib_cfg_get_node_addrs (void *conn,
	const void *msg)
	{
	struct totem_ip_address node_ifs[INTERFACE_MAX];
	char buf[PIPE_BUF];
	char **status;
	unsigned int num_interfaces = 0;
	int ret = CS_OK;
	int i;
	const struct req_lib_cfg_get_node_addrs *req_lib_cfg_get_node_addrs = msg;
	struct res_lib_cfg_get_node_addrs res_lib_cfg_get_node_addrs = (struct res_lib_cfg_get_node_addrs )buf;
	unsigned int nodeid = req_lib_cfg_get_node_addrs->nodeid;

	if (nodeid == 0)
	nodeid = api->totem_nodeid_get();

	api->totem_ifaces_get(nodeid, node_ifs, &status, &num_interfaces);

	res_lib_cfg_get_node_addrs->header.size = sizeof(struct res_lib_cfg_get_node_addrs) + (num_interfaces * TOTEMIP_ADDRLEN);
	res_lib_cfg_get_node_addrs->header.id = MESSAGE_RES_CFG_GET_NODE_ADDRS;
	res_lib_cfg_get_node_addrs->header.error = ret;
	res_lib_cfg_get_node_addrs->num_addrs = num_interfaces;
	if (num_interfaces) {
	res_lib_cfg_get_node_addrs->family = node_ifs[0].family;
	for (i = 0; i<num_interfaces; i++) {
	memcpy(&res_lib_cfg_get_node_addrs->addrs[i][0], node_ifs[i].addr, TOTEMIP_ADDRLEN);
	}
	}
	else {
	res_lib_cfg_get_node_addrs->header.error = CS_ERR_NOT_EXIST;
	}
	api->ipc_response_send(conn, res_lib_cfg_get_node_addrs, res_lib_cfg_get_node_addrs->header.size);
	}

	static void message_handler_req_lib_cfg_local_get (void conn, const void msg)
	{
	struct res_lib_cfg_local_get res_lib_cfg_local_get;

	res_lib_cfg_local_get.header.size = sizeof(res_lib_cfg_local_get);
	res_lib_cfg_local_get.header.id = MESSAGE_RES_CFG_LOCAL_GET;
	res_lib_cfg_local_get.header.error = CS_OK;
	res_lib_cfg_local_get.local_nodeid = api->totem_nodeid_get ();

	api->ipc_response_send(conn, &res_lib_cfg_local_get,
	sizeof(res_lib_cfg_local_get));
	}


	static void message_handler_req_lib_cfg_crypto_set (
	void *conn,
	const void *msg)
	{
	const struct req_lib_cfg_crypto_set *req_lib_cfg_crypto_set = msg;
	struct res_lib_cfg_crypto_set res_lib_cfg_crypto_set;
	struct req_exec_cfg_crypto_set req_exec_cfg_crypto_set;
	struct iovec iovec;
	int ret = CS_ERR_INVALID_PARAM;

	req_exec_cfg_crypto_set.header.size =
	sizeof (struct req_exec_cfg_crypto_set);
	req_exec_cfg_crypto_set.header.id = SERVICE_ID_MAKE (CFG_SERVICE,
	MESSAGE_REQ_EXEC_CFG_CRYPTO_SET);

	/*
	* Set it locally first so we can tell if it is allowed
	*/
	if (api->totem_crypto_set(req_lib_cfg_crypto_set->type) == 0) {

	req_exec_cfg_crypto_set.type = req_lib_cfg_crypto_set->type;

	iovec.iov_base = (char *)&req_exec_cfg_crypto_set;
	iovec.iov_len = sizeof (struct req_exec_cfg_crypto_set);
	assert (api->totem_mcast (&iovec, 1, TOTEM_SAFE) == 0);
	ret = CS_OK;
	}

	res_lib_cfg_crypto_set.header.size = sizeof(res_lib_cfg_crypto_set);
	res_lib_cfg_crypto_set.header.id = MESSAGE_RES_CFG_CRYPTO_SET;
	res_lib_cfg_crypto_set.header.error = ret;

	api->ipc_response_send(conn, &res_lib_cfg_crypto_set,
	sizeof(res_lib_cfg_crypto_set));
	}

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