/*
	 * Copyright (c) 2006-2019 Red Hat, Inc.
	 *
	 * All rights reserved.
	 *
	 * Author: Christine Caulfield (ccaulfie@redhat.com)
	 * Author: Jan Friesse (jfriesse@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 CONTIBUTORS "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>
	
	#ifdef HAVE_ALLOCA_H
	#include <alloca.h>
	#endif
	#include <sys/types.h>
	#include <sys/socket.h>
	#include <sys/un.h>
	#include <sys/ioctl.h>
	#include <netinet/in.h>
	#include <sys/uio.h>
	#include <unistd.h>
	#include <fcntl.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <errno.h>
	#include <time.h>
	#include <assert.h>
	#include <arpa/inet.h>
	#include <sys/mman.h>
	
	#include <qb/qblist.h>
	#include <qb/qbmap.h>
	
	#include <corosync/corotypes.h>
	#include <qb/qbipc_common.h>
	#include <corosync/corodefs.h>
	#include <corosync/logsys.h>
	#include <corosync/coroapi.h>
	
	#include <corosync/cpg.h>
	#include <corosync/ipc_cpg.h>
	
	#ifndef MAP_ANONYMOUS
	#define MAP_ANONYMOUS MAP_ANON
	#endif
	
	#include "service.h"
	
	LOGSYS_DECLARE_SUBSYS ("CPG");
	
	#define GROUP_HASH_SIZE 32
	
	enum cpg_message_req_types {
		MESSAGE_REQ_EXEC_CPG_PROCJOIN = 0,
		MESSAGE_REQ_EXEC_CPG_PROCLEAVE = 1,
		MESSAGE_REQ_EXEC_CPG_JOINLIST = 2,
		MESSAGE_REQ_EXEC_CPG_MCAST = 3,
		MESSAGE_REQ_EXEC_CPG_DOWNLIST_OLD = 4,
		MESSAGE_REQ_EXEC_CPG_DOWNLIST = 5,
		MESSAGE_REQ_EXEC_CPG_PARTIAL_MCAST = 6,
	};
	
	struct zcb_mapped {
		struct qb_list_head list;
		void *addr;
		size_t size;
	};
	/*
	 * state`		exec deliver
	 * match group name, pid -> if matched deliver for YES:
	 * XXX indicates impossible state
	 *
	 *			join			leave			mcast
	 * UNJOINED		XXX			XXX			NO
	 * LEAVE_STARTED	XXX			YES(unjoined_enter)	YES
	 * JOIN_STARTED		YES(join_started_enter)	XXX			NO
	 * JOIN_COMPLETED	XXX			NO			YES
	 *
	 * join_started_enter
	 * 	set JOIN_COMPLETED
	 *	add entry to process_info list
	 * unjoined_enter
	 *	set UNJOINED
	 *	delete entry from process_info list
	 *
	 *
	 *			library accept join error codes
	 * UNJOINED		YES(CS_OK) 			set JOIN_STARTED
	 * LEAVE_STARTED	NO(CS_ERR_BUSY)
	 * JOIN_STARTED		NO(CS_ERR_EXIST)
	 * JOIN_COMPlETED	NO(CS_ERR_EXIST)
	 *
	 *			library accept leave error codes
	 * UNJOINED		NO(CS_ERR_NOT_EXIST)
	 * LEAVE_STARTED	NO(CS_ERR_NOT_EXIST)
	 * JOIN_STARTED		NO(CS_ERR_BUSY)
	 * JOIN_COMPLETED	YES(CS_OK)			set LEAVE_STARTED
	 *
	 *			library accept mcast
	 * UNJOINED		NO(CS_ERR_NOT_EXIST)
	 * LEAVE_STARTED	NO(CS_ERR_NOT_EXIST)
	 * JOIN_STARTED		YES(CS_OK)
	 * JOIN_COMPLETED	YES(CS_OK)
	 */
	enum cpd_state {
		CPD_STATE_UNJOINED,
		CPD_STATE_LEAVE_STARTED,
		CPD_STATE_JOIN_STARTED,
		CPD_STATE_JOIN_COMPLETED
	};
	
	enum cpg_sync_state {
		CPGSYNC_DOWNLIST,
		CPGSYNC_JOINLIST
	};
	
	static struct qb_list_head joinlist_messages_head;
	
	struct cpg_pd {
		void *conn;
	 	mar_cpg_name_t group_name;
		uint32_t pid;
		enum cpd_state cpd_state;
		unsigned int flags;
		int initial_totem_conf_sent;
		uint64_t transition_counter; /* These two are used when sending fragmented messages */
		uint64_t initial_transition_counter;
		struct qb_list_head list;
		struct qb_list_head iteration_instance_list_head;
		struct qb_list_head zcb_mapped_list_head;
	};
	
	struct cpg_iteration_instance {
		hdb_handle_t handle;
		struct qb_list_head list;
		struct qb_list_head items_list_head; /* List of process_info */
		struct qb_list_head *current_pointer;
	};
	
	DECLARE_HDB_DATABASE(cpg_iteration_handle_t_db,NULL);
	
	QB_LIST_DECLARE (cpg_pd_list_head);
	
	static unsigned int my_member_list[PROCESSOR_COUNT_MAX];
	
	static unsigned int my_member_list_entries;
	
	static unsigned int my_old_member_list[PROCESSOR_COUNT_MAX];
	
	static unsigned int my_old_member_list_entries = 0;
	
	static struct corosync_api_v1 *api = NULL;
	
	static enum cpg_sync_state my_sync_state = CPGSYNC_DOWNLIST;
	
	static mar_cpg_ring_id_t last_sync_ring_id;
	
	struct process_info {
		unsigned int nodeid;
		uint32_t pid;
		mar_cpg_name_t group;
		struct qb_list_head list; /* on the group_info members list */
	};
	QB_LIST_DECLARE (process_info_list_head);
	
	struct join_list_entry {
		uint32_t pid;
		mar_cpg_name_t group_name;
	};
	
	struct join_list_confchg_data {
		mar_cpg_name_t cpg_group;
		mar_cpg_address_t join_list[CPG_MEMBERS_MAX];
		int join_list_entries;
	};
	
	/*
	 * Service Interfaces required by service_message_handler struct
	 */
	static char *cpg_exec_init_fn (struct corosync_api_v1 *);
	
	static int cpg_lib_init_fn (void *conn);
	
	static int cpg_lib_exit_fn (void *conn);
	
	static void message_handler_req_exec_cpg_procjoin (
		const void *message,
		unsigned int nodeid);
	
	static void message_handler_req_exec_cpg_procleave (
		const void *message,
		unsigned int nodeid);
	
	static void message_handler_req_exec_cpg_joinlist (
		const void *message,
		unsigned int nodeid);
	
	static void message_handler_req_exec_cpg_mcast (
		const void *message,
		unsigned int nodeid);
	
	static void message_handler_req_exec_cpg_partial_mcast (
		const void *message,
		unsigned int nodeid);
	
	static void message_handler_req_exec_cpg_downlist_old (
		const void *message,
		unsigned int nodeid);
	
	static void message_handler_req_exec_cpg_downlist (
		const void *message,
		unsigned int nodeid);
	
	static void exec_cpg_procjoin_endian_convert (void *msg);
	
	static void exec_cpg_joinlist_endian_convert (void *msg);
	
	static void exec_cpg_mcast_endian_convert (void *msg);
	
	static void exec_cpg_partial_mcast_endian_convert (void *msg);
	
	static void exec_cpg_downlist_endian_convert_old (void *msg);
	
	static void exec_cpg_downlist_endian_convert (void *msg);
	
	static void message_handler_req_lib_cpg_join (void *conn, const void *message);
	
	static void message_handler_req_lib_cpg_leave (void *conn, const void *message);
	
	static void message_handler_req_lib_cpg_finalize (void *conn, const void *message);
	
	static void message_handler_req_lib_cpg_mcast (void *conn, const void *message);
	
	static void message_handler_req_lib_cpg_partial_mcast (void *conn, const void *message);
	
	static void message_handler_req_lib_cpg_membership (void *conn,
							    const void *message);
	
	static void message_handler_req_lib_cpg_local_get (void *conn,
							   const void *message);
	
	static void message_handler_req_lib_cpg_iteration_initialize (
		void *conn,
		const void *message);
	
	static void message_handler_req_lib_cpg_iteration_next (
		void *conn,
		const void *message);
	
	static void message_handler_req_lib_cpg_iteration_finalize (
		void *conn,
		const void *message);
	
	static void message_handler_req_lib_cpg_zc_alloc (
		void *conn,
		const void *message);
	
	static void message_handler_req_lib_cpg_zc_free (
		void *conn,
		const void *message);
	
	static void message_handler_req_lib_cpg_zc_execute (
		void *conn,
		const void *message);
	
	static int cpg_node_joinleave_send (unsigned int pid, const mar_cpg_name_t *group_name, int fn, int reason);
	
	static int cpg_exec_send_downlist(void);
	
	static int cpg_exec_send_joinlist(void);
	
	static void downlist_inform_clients (void);
	
	static void joinlist_inform_clients (void);
	
	static void joinlist_messages_delete (void);
	
	static void cpg_sync_init (
		const unsigned int *trans_list,
		size_t trans_list_entries,
		const unsigned int *member_list,
		size_t member_list_entries,
		const struct memb_ring_id *ring_id);
	
	static int  cpg_sync_process (void);
	
	static void cpg_sync_activate (void);
	
	static void cpg_sync_abort (void);
	
	static void do_proc_join(
		const mar_cpg_name_t *name,
		uint32_t pid,
		unsigned int nodeid,
		int reason,
		qb_map_t *group_notify_map);
	
	static void do_proc_leave(
		const mar_cpg_name_t *name,
		uint32_t pid,
		unsigned int nodeid,
		int reason);
	
	static int notify_lib_totem_membership (
		void *conn,
		int member_list_entries,
		const unsigned int *member_list);
	
	static inline int zcb_all_free (
		struct cpg_pd *cpd);
	
	static char *cpg_print_group_name (
		const mar_cpg_name_t *group);
	
	/*
	 * Library Handler Definition
	 */
	static struct corosync_lib_handler cpg_lib_engine[] =
	{
		{ /* 0 - MESSAGE_REQ_CPG_JOIN */
			.lib_handler_fn				= message_handler_req_lib_cpg_join,
			.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED
		},
		{ /* 1 - MESSAGE_REQ_CPG_LEAVE */
			.lib_handler_fn				= message_handler_req_lib_cpg_leave,
			.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED
		},
		{ /* 2 - MESSAGE_REQ_CPG_MCAST */
			.lib_handler_fn				= message_handler_req_lib_cpg_mcast,
			.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED
		},
		{ /* 3 - MESSAGE_REQ_CPG_MEMBERSHIP */
			.lib_handler_fn				= message_handler_req_lib_cpg_membership,
			.flow_control				= CS_LIB_FLOW_CONTROL_NOT_REQUIRED
		},
		{ /* 4 - MESSAGE_REQ_CPG_LOCAL_GET */
			.lib_handler_fn				= message_handler_req_lib_cpg_local_get,
			.flow_control				= CS_LIB_FLOW_CONTROL_NOT_REQUIRED
		},
		{ /* 5 - MESSAGE_REQ_CPG_ITERATIONINITIALIZE */
			.lib_handler_fn				= message_handler_req_lib_cpg_iteration_initialize,
			.flow_control				= CS_LIB_FLOW_CONTROL_NOT_REQUIRED
		},
		{ /* 6 - MESSAGE_REQ_CPG_ITERATIONNEXT */
			.lib_handler_fn				= message_handler_req_lib_cpg_iteration_next,
			.flow_control				= CS_LIB_FLOW_CONTROL_NOT_REQUIRED
		},
		{ /* 7 - MESSAGE_REQ_CPG_ITERATIONFINALIZE */
			.lib_handler_fn				= message_handler_req_lib_cpg_iteration_finalize,
			.flow_control				= CS_LIB_FLOW_CONTROL_NOT_REQUIRED
		},
		{ /* 8 - MESSAGE_REQ_CPG_FINALIZE */
			.lib_handler_fn				= message_handler_req_lib_cpg_finalize,
			.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED
		},
		{ /* 9 */
			.lib_handler_fn				= message_handler_req_lib_cpg_zc_alloc,
			.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED
		},
		{ /* 10 */
			.lib_handler_fn				= message_handler_req_lib_cpg_zc_free,
			.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED
		},
		{ /* 11 */
			.lib_handler_fn				= message_handler_req_lib_cpg_zc_execute,
			.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED
		},
		{ /* 12 */
			.lib_handler_fn				= message_handler_req_lib_cpg_partial_mcast,
			.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED
		},
	
	};
	
	static struct corosync_exec_handler cpg_exec_engine[] =
	{
		{ /* 0 - MESSAGE_REQ_EXEC_CPG_PROCJOIN */
			.exec_handler_fn	= message_handler_req_exec_cpg_procjoin,
			.exec_endian_convert_fn	= exec_cpg_procjoin_endian_convert
		},
		{ /* 1 - MESSAGE_REQ_EXEC_CPG_PROCLEAVE */
			.exec_handler_fn	= message_handler_req_exec_cpg_procleave,
			.exec_endian_convert_fn	= exec_cpg_procjoin_endian_convert
		},
		{ /* 2 - MESSAGE_REQ_EXEC_CPG_JOINLIST */
			.exec_handler_fn	= message_handler_req_exec_cpg_joinlist,
			.exec_endian_convert_fn	= exec_cpg_joinlist_endian_convert
		},
		{ /* 3 - MESSAGE_REQ_EXEC_CPG_MCAST */
			.exec_handler_fn	= message_handler_req_exec_cpg_mcast,
			.exec_endian_convert_fn	= exec_cpg_mcast_endian_convert
		},
		{ /* 4 - MESSAGE_REQ_EXEC_CPG_DOWNLIST_OLD */
			.exec_handler_fn	= message_handler_req_exec_cpg_downlist_old,
			.exec_endian_convert_fn	= exec_cpg_downlist_endian_convert_old
		},
		{ /* 5 - MESSAGE_REQ_EXEC_CPG_DOWNLIST */
			.exec_handler_fn	= message_handler_req_exec_cpg_downlist,
			.exec_endian_convert_fn	= exec_cpg_downlist_endian_convert
		},
		{ /* 6 - MESSAGE_REQ_EXEC_CPG_PARTIAL_MCAST */
			.exec_handler_fn	= message_handler_req_exec_cpg_partial_mcast,
			.exec_endian_convert_fn	= exec_cpg_partial_mcast_endian_convert
		},
	};
	
	struct corosync_service_engine cpg_service_engine = {
		.name				        = "corosync cluster closed process group service v1.01",
		.id					= CPG_SERVICE,
		.priority				= 1,
		.private_data_size			= sizeof (struct cpg_pd),
		.flow_control				= CS_LIB_FLOW_CONTROL_REQUIRED,
		.allow_inquorate			= CS_LIB_ALLOW_INQUORATE,
		.lib_init_fn				= cpg_lib_init_fn,
		.lib_exit_fn				= cpg_lib_exit_fn,
		.lib_engine				= cpg_lib_engine,
		.lib_engine_count			= sizeof (cpg_lib_engine) / sizeof (struct corosync_lib_handler),
		.exec_init_fn				= cpg_exec_init_fn,
		.exec_dump_fn				= NULL,
		.exec_engine				= cpg_exec_engine,
		.exec_engine_count		        = sizeof (cpg_exec_engine) / sizeof (struct corosync_exec_handler),
		.sync_init                              = cpg_sync_init,
		.sync_process                           = cpg_sync_process,
		.sync_activate                          = cpg_sync_activate,
		.sync_abort                             = cpg_sync_abort
	};
	
	struct corosync_service_engine *cpg_get_service_engine_ver0 (void)
	{
		return (&cpg_service_engine);
	}
	
	struct req_exec_cpg_procjoin {
		struct qb_ipc_request_header header __attribute__((aligned(8)));
		mar_cpg_name_t group_name __attribute__((aligned(8)));
		mar_uint32_t pid __attribute__((aligned(8)));
		mar_uint32_t reason __attribute__((aligned(8)));
	};
	
	struct req_exec_cpg_mcast {
		struct qb_ipc_request_header header __attribute__((aligned(8)));
		mar_cpg_name_t group_name __attribute__((aligned(8)));
		mar_uint32_t msglen __attribute__((aligned(8)));
		mar_uint32_t pid __attribute__((aligned(8)));
		mar_message_source_t source __attribute__((aligned(8)));
		mar_uint8_t message[] __attribute__((aligned(8)));
	};
	
	struct req_exec_cpg_partial_mcast {
		struct qb_ipc_request_header header __attribute__((aligned(8)));
		mar_cpg_name_t group_name __attribute__((aligned(8)));
		mar_uint32_t msglen __attribute__((aligned(8)));
		mar_uint32_t fraglen __attribute__((aligned(8)));
		mar_uint32_t pid __attribute__((aligned(8)));
		mar_uint32_t type __attribute__((aligned(8)));
		mar_message_source_t source __attribute__((aligned(8)));
		mar_uint8_t message[] __attribute__((aligned(8)));
	};
	
	struct req_exec_cpg_downlist_old {
		struct qb_ipc_request_header header __attribute__((aligned(8)));
		mar_uint32_t left_nodes __attribute__((aligned(8)));
		mar_uint32_t nodeids[PROCESSOR_COUNT_MAX]  __attribute__((aligned(8)));
	};
	
	struct req_exec_cpg_downlist {
		struct qb_ipc_request_header header __attribute__((aligned(8)));
		/* merge decisions */
		mar_uint32_t old_members __attribute__((aligned(8)));
		/* downlist below */
		mar_uint32_t left_nodes __attribute__((aligned(8)));
		mar_uint32_t nodeids[PROCESSOR_COUNT_MAX]  __attribute__((aligned(8)));
	};
	
	struct joinlist_msg {
		mar_uint32_t sender_nodeid;
		uint32_t pid;
		mar_cpg_name_t group_name;
		struct qb_list_head list;
	};
	
	static struct req_exec_cpg_downlist g_req_exec_cpg_downlist;
	
	/*
	 * Function print group name. It's not reentrant
	 */
	static char *cpg_print_group_name(const mar_cpg_name_t *group)
	{
		static char res[CPG_MAX_NAME_LENGTH * 4 + 1];
		int dest_pos = 0;
		char c;
		int i;
	
		for (i = 0; i < group->length; i++) {
			c = group->value[i];
	
			if (c >= ' ' && c < 0x7f && c != '\\') {
				res[dest_pos++] = c;
	                } else {
				if (c == '\\') {
					res[dest_pos++] = '\\';
					res[dest_pos++] = '\\';
				} else {
					snprintf(res + dest_pos, sizeof(res) - dest_pos, "\\x%02X", c);
					dest_pos += 4;
				}
			}
		}
		res[dest_pos] = 0;
	
		return (res);
	}
	
	static void cpg_sync_init (
		const unsigned int *trans_list,
		size_t trans_list_entries,
		const unsigned int *member_list,
		size_t member_list_entries,
		const struct memb_ring_id *ring_id)
	{
		int entries;
		int i, j;
		int found;
	
		my_sync_state = CPGSYNC_DOWNLIST;
	
		memcpy (my_member_list, member_list, member_list_entries *
			sizeof (unsigned int));
		my_member_list_entries = member_list_entries;
	
		last_sync_ring_id.nodeid = ring_id->nodeid;
		last_sync_ring_id.seq = ring_id->seq;
	
		entries = 0;
		/*
		 * Determine list of nodeids for downlist message
		 */
		for (i = 0; i < my_old_member_list_entries; i++) {
			found = 0;
			for (j = 0; j < trans_list_entries; j++) {
				if (my_old_member_list[i] == trans_list[j]) {
					found = 1;
					break;
				}
			}
			if (found == 0) {
				g_req_exec_cpg_downlist.nodeids[entries++] =
					my_old_member_list[i];
			}
		}
		g_req_exec_cpg_downlist.left_nodes = entries;
	}
	
	static int cpg_sync_process (void)
	{
		int res = -1;
	
		if (my_sync_state == CPGSYNC_DOWNLIST) {
			res = cpg_exec_send_downlist();
			if (res == -1) {
				return (-1);
			}
			my_sync_state = CPGSYNC_JOINLIST;
		}
		if (my_sync_state == CPGSYNC_JOINLIST) {
			res = cpg_exec_send_joinlist();
		}
		return (res);
	}
	
	static void cpg_sync_activate (void)
	{
		memcpy (my_old_member_list, my_member_list,
			my_member_list_entries * sizeof (unsigned int));
		my_old_member_list_entries = my_member_list_entries;
	
		downlist_inform_clients ();
	
		joinlist_inform_clients ();
	
		joinlist_messages_delete ();
	
		notify_lib_totem_membership (NULL, my_member_list_entries, my_member_list);
	}
	
	static void cpg_sync_abort (void)
	{
	
		joinlist_messages_delete ();
	}
	
	static int notify_lib_totem_membership (
		void *conn,
		int member_list_entries,
		const unsigned int *member_list)
	{
		struct qb_list_head *iter;
		char *buf;
		int size;
		struct res_lib_cpg_totem_confchg_callback *res;
	
		size = sizeof(struct res_lib_cpg_totem_confchg_callback) +
			sizeof(mar_uint32_t) * (member_list_entries);
		buf = alloca(size);
		if (!buf)
			return CS_ERR_LIBRARY;
	
		res = (struct res_lib_cpg_totem_confchg_callback *)buf;
		res->member_list_entries = member_list_entries;
		res->header.size = size;
		res->header.id = MESSAGE_RES_CPG_TOTEM_CONFCHG_CALLBACK;
		res->header.error = CS_OK;
	
		memcpy (&res->ring_id, &last_sync_ring_id, sizeof (mar_cpg_ring_id_t));
		memcpy (res->member_list, member_list, res->member_list_entries * sizeof (mar_uint32_t));
	
		if (conn == NULL) {
			qb_list_for_each(iter, &cpg_pd_list_head) {
				struct cpg_pd *cpg_pd = qb_list_entry (iter, struct cpg_pd, list);
				api->ipc_dispatch_send (cpg_pd->conn, buf, size);
			}
		} else {
			api->ipc_dispatch_send (conn, buf, size);
		}
	
		return CS_OK;
	}
	
	/*
	 * Helper function for notify_lib_joinlist which prepares member_list using
	 * process_info_list with removed left_list items.
	 * member_list_entries - When not NULL it contains number of member_list entries
	 * member_list - When not NULL it is used as pointer to start of preallocated
	 *               array of members. Pointer is adjusted to the end of array on
	 *               exit.
	 */
	static void notify_lib_joinlist_fill_member_list(
		const mar_cpg_name_t *group_name,
		int left_list_entries,
		const mar_cpg_address_t *left_list,
		int *member_list_entries,
		mar_cpg_address_t **member_list)
	{
		struct qb_list_head *iter;
		int i;
	
		if (member_list_entries != NULL) {
			*member_list_entries = 0;
		}
	
		qb_list_for_each(iter, &process_info_list_head) {
			struct process_info *pi = qb_list_entry (iter, struct process_info, list);
	
			if (mar_name_compare (&pi->group, group_name) == 0) {
				int in_left_list = 0;
	
				for (i = 0; i < left_list_entries; i++) {
					if (left_list[i].nodeid == pi->nodeid && left_list[i].pid == pi->pid) {
						in_left_list = 1;
						break ;
					}
				}
	
				if (!in_left_list) {
					if (member_list_entries != NULL) {
						(*member_list_entries)++;
					}
	
					if (member_list != NULL) {
						(*member_list)->nodeid = pi->nodeid;
						(*member_list)->pid = pi->pid;
						(*member_list)->reason = CPG_REASON_UNDEFINED;
						(*member_list)++;
					}
				}
			}
		}
	}
	
	static int notify_lib_joinlist(
		const mar_cpg_name_t *group_name,
		int joined_list_entries,
		mar_cpg_address_t *joined_list,
		int left_list_entries,
		mar_cpg_address_t *left_list,
		int id)
	{
		int size;
		char *buf;
		struct qb_list_head *iter;
		int member_list_entries;
		struct res_lib_cpg_confchg_callback *res;
		mar_cpg_address_t *retgi;
		int i;
	
		/*
		 * Find size of member_list (use process_info_list but remove items in left_list)
		 */
		notify_lib_joinlist_fill_member_list(group_name, left_list_entries, left_list,
		    &member_list_entries, NULL);
	
		size = sizeof(struct res_lib_cpg_confchg_callback) +
			sizeof(mar_cpg_address_t) * (member_list_entries + left_list_entries + joined_list_entries);
		buf = alloca(size);
		if (!buf)
			return CS_ERR_LIBRARY;
	
		res = (struct res_lib_cpg_confchg_callback *)buf;
		res->joined_list_entries = joined_list_entries;
		res->left_list_entries = left_list_entries;
		res->member_list_entries = member_list_entries;
		retgi = res->member_list;
		res->header.size = size;
		res->header.id = id;
		res->header.error = CS_OK;
		memcpy(&res->group_name, group_name, sizeof(mar_cpg_name_t));
	
		/*
		 * Fill res->memberlist. Use process_info_list but remove items in left_list.
		 */
		notify_lib_joinlist_fill_member_list(group_name, left_list_entries, left_list,
		    NULL, &retgi);
	
		/*
		 * Fill res->left_list
		 */
		if (left_list_entries) {
			memcpy (retgi, left_list, left_list_entries * sizeof(mar_cpg_address_t));
			retgi += left_list_entries;
		}
	
		if (joined_list_entries) {
			/*
			 * Fill res->joined_list
			 */
			memcpy (retgi, joined_list, joined_list_entries * sizeof(mar_cpg_address_t));
			retgi += joined_list_entries;
	
			/*
			 * Update cpd_state for all local joined processes in group
			 */
			for (i = 0; i < joined_list_entries; i++) {
				if (joined_list[i].nodeid == api->totem_nodeid_get()) {
					qb_list_for_each(iter, &cpg_pd_list_head) {
						struct cpg_pd *cpd = qb_list_entry (iter, struct cpg_pd, list);
						if (joined_list[i].pid == cpd->pid &&
						    mar_name_compare (&cpd->group_name, group_name) == 0) {
							cpd->cpd_state = CPD_STATE_JOIN_COMPLETED;
						}
					}
				}
			}
		}
	
		/*
		 * Send notification to all ipc clients joined in group_name
		 */
		qb_list_for_each(iter, &cpg_pd_list_head) {
			struct cpg_pd *cpd = qb_list_entry (iter, struct cpg_pd, list);
			if (mar_name_compare (&cpd->group_name, group_name) == 0) {
				if (cpd->cpd_state == CPD_STATE_JOIN_COMPLETED ||
					cpd->cpd_state == CPD_STATE_LEAVE_STARTED) {
	
					api->ipc_dispatch_send (cpd->conn, buf, size);
					cpd->transition_counter++;
				}
			}
		}
	
		if (left_list_entries) {
			/*
			 * Zero internal cpd state for all local processes leaving group
			 * (this loop is not strictly needed because left_list always either
			 *  contains exactly one process running on local node or more items
			 *  but none of them is running on local node)
			 */
			for (i = 0; i < joined_list_entries; i++) {
				if (left_list[i].nodeid == api->totem_nodeid_get() &&
				    left_list[i].reason == CONFCHG_CPG_REASON_LEAVE) {
					qb_list_for_each(iter, &cpg_pd_list_head) {
						struct cpg_pd *cpd = qb_list_entry (iter, struct cpg_pd, list);
						if (left_list[i].pid == cpd->pid &&
						    mar_name_compare (&cpd->group_name, group_name) == 0) {
							cpd->pid = 0;
							memset (&cpd->group_name, 0, sizeof(cpd->group_name));
							cpd->cpd_state = CPD_STATE_UNJOINED;
						}
					}
				}
			}
		}
	
		/*
		 * Traverse thru cpds and send totem membership for cpd, where it is not send yet
		 */
		qb_list_for_each(iter, &cpg_pd_list_head) {
			struct cpg_pd *cpd = qb_list_entry (iter, struct cpg_pd, list);
	
			if ((cpd->flags & CPG_MODEL_V1_DELIVER_INITIAL_TOTEM_CONF) && (cpd->initial_totem_conf_sent == 0)) {
				cpd->initial_totem_conf_sent = 1;
	
				notify_lib_totem_membership (cpd->conn, my_old_member_list_entries, my_old_member_list);
			}
		}
	
		return CS_OK;
	}
	
	static void downlist_log(const char *msg, struct req_exec_cpg_downlist *dl)
	{
		log_printf (LOG_DEBUG,
			    "%s: members(old:%d left:%d)",
			    msg,
			    dl->old_members,
			    dl->left_nodes);
	}
	
	static void downlist_inform_clients (void)
	{
		struct qb_list_head *iter, *tmp_iter;
		struct process_info *left_pi;
		qb_map_t *group_map;
		struct cpg_name cpg_group;
		mar_cpg_name_t group;
		struct confchg_data{
			struct cpg_name cpg_group;
			mar_cpg_address_t left_list[CPG_MEMBERS_MAX];
			int left_list_entries;
			struct qb_list_head  list;
		} *pcd;
		qb_map_iter_t *miter;
		int i, size;
	
		downlist_log("my downlist", &g_req_exec_cpg_downlist);
	
		group_map = qb_skiplist_create();
	
		/*
		 * only the cpg groups included in left nodes should receive
		 * confchg event, so we will collect these cpg groups and
		 * relative left_lists here.
		 */
		qb_list_for_each_safe(iter, tmp_iter, &process_info_list_head) {
			struct process_info *pi = qb_list_entry(iter, struct process_info, list);
	
			left_pi = NULL;
			for (i = 0; i < g_req_exec_cpg_downlist.left_nodes; i++) {
	
				if (pi->nodeid == g_req_exec_cpg_downlist.nodeids[i]) {
					left_pi = pi;
					break;
				}
			}
	
			if (left_pi) {
				marshall_from_mar_cpg_name_t(&cpg_group, &left_pi->group);
				cpg_group.value[cpg_group.length] = 0;
	
				pcd = (struct confchg_data *)qb_map_get(group_map, cpg_group.value);
				if (pcd == NULL) {
					pcd = (struct confchg_data *)calloc(1, sizeof(struct confchg_data));
					memcpy(&pcd->cpg_group, &cpg_group, sizeof(struct cpg_name));
					qb_map_put(group_map, pcd->cpg_group.value, pcd);
				}
				size = pcd->left_list_entries;
				pcd->left_list[size].nodeid = left_pi->nodeid;
				pcd->left_list[size].pid = left_pi->pid;
				pcd->left_list[size].reason = CONFCHG_CPG_REASON_NODEDOWN;
				pcd->left_list_entries++;
				qb_list_del (&left_pi->list);
				free (left_pi);
			}
		}
	
		/* send only one confchg event per cpg group */
		miter = qb_map_iter_create(group_map);
		while (qb_map_iter_next(miter, (void **)&pcd)) {
			marshall_to_mar_cpg_name_t(&group, &pcd->cpg_group);
	
			log_printf (LOG_DEBUG, "left_list_entries:%d", pcd->left_list_entries);
			for (i=0; i<pcd->left_list_entries; i++) {
				log_printf (LOG_DEBUG, "left_list[%d] group:%s, ip:%s, pid:%d",
					i, cpg_print_group_name(&group),
					(char*)api->totem_ifaces_print(pcd->left_list[i].nodeid),
					pcd->left_list[i].pid);
			}
	
			/* send confchg event */
			notify_lib_joinlist(&group,
				0, NULL,
				pcd->left_list_entries,
				pcd->left_list,
				MESSAGE_RES_CPG_CONFCHG_CALLBACK);
	
			free(pcd);
		}
		qb_map_iter_free(miter);
		qb_map_destroy(group_map);
	}
	
	/*
	 * Remove processes that might have left the group while we were suspended.
	 */
	static void joinlist_remove_zombie_pi_entries (void)
	{
		struct qb_list_head *pi_iter, *tmp_iter;
		struct qb_list_head *jl_iter;
		struct process_info *pi;
		struct joinlist_msg *stored_msg;
		int found;
	
		qb_list_for_each_safe(pi_iter, tmp_iter, &process_info_list_head) {
			pi = qb_list_entry (pi_iter, struct process_info, list);
	
			/*
			 * Ignore local node
			 */
			if (pi->nodeid == api->totem_nodeid_get()) {
				continue ;
			}
	
			/*
			 * Try to find message in joinlist messages
			 */
			found = 0;
			qb_list_for_each(jl_iter, &joinlist_messages_head) {
				stored_msg = qb_list_entry(jl_iter, struct joinlist_msg, list);
	
				if (stored_msg->sender_nodeid == api->totem_nodeid_get()) {
					continue ;
				}
	
				if (pi->nodeid == stored_msg->sender_nodeid &&
				    pi->pid == stored_msg->pid &&
				    mar_name_compare (&pi->group, &stored_msg->group_name) == 0) {
					found = 1;
					break ;
				}
			}
	
			if (!found) {
				do_proc_leave(&pi->group, pi->pid, pi->nodeid, CONFCHG_CPG_REASON_PROCDOWN);
			}
		}
	}
	
	static void joinlist_inform_clients (void)
	{
		struct joinlist_msg *stored_msg;
		struct qb_list_head *iter;
		unsigned int i;
		qb_map_t *group_notify_map;
		qb_map_iter_t *miter;
		struct join_list_confchg_data *jld;
	
		group_notify_map = qb_skiplist_create();
	
		i = 0;
		qb_list_for_each(iter, &joinlist_messages_head) {
			stored_msg = qb_list_entry(iter, struct joinlist_msg, list);
	
			log_printf (LOG_DEBUG, "joinlist_messages[%u] group:%s, ip:%s, pid:%d",
				i++, cpg_print_group_name(&stored_msg->group_name),
				(char*)api->totem_ifaces_print(stored_msg->sender_nodeid),
				stored_msg->pid);
	
			/* Ignore our own messages */
			if (stored_msg->sender_nodeid == api->totem_nodeid_get()) {
				continue ;
			}
	
			do_proc_join (&stored_msg->group_name, stored_msg->pid, stored_msg->sender_nodeid,
				CONFCHG_CPG_REASON_NODEUP, group_notify_map);
		}
	
		miter = qb_map_iter_create(group_notify_map);
		while (qb_map_iter_next(miter, (void **)&jld)) {
			notify_lib_joinlist(&jld->cpg_group,
					    jld->join_list_entries, jld->join_list,
					    0, NULL,
					    MESSAGE_RES_CPG_CONFCHG_CALLBACK);
			free(jld);
		}
		qb_map_iter_free(miter);
		qb_map_destroy(group_notify_map);
	
		joinlist_remove_zombie_pi_entries ();
	}
	
	static void joinlist_messages_delete (void)
	{
		struct joinlist_msg *stored_msg;
		struct qb_list_head *iter, *tmp_iter;
	
		qb_list_for_each_safe(iter, tmp_iter, &joinlist_messages_head) {
			stored_msg = qb_list_entry(iter, struct joinlist_msg, list);
			qb_list_del (&stored_msg->list);
			free (stored_msg);
		}
		qb_list_init (&joinlist_messages_head);
	}
	
	static char *cpg_exec_init_fn (struct corosync_api_v1 *corosync_api)
	{
		qb_list_init (&joinlist_messages_head);
		api = corosync_api;
		return (NULL);
	}
	
	static void cpg_iteration_instance_finalize (struct cpg_iteration_instance *cpg_iteration_instance)
	{
		struct qb_list_head *iter, *tmp_iter;
		struct process_info *pi;
	
		qb_list_for_each_safe(iter, tmp_iter, &(cpg_iteration_instance->items_list_head)) {
			pi = qb_list_entry (iter, struct process_info, list);
			qb_list_del (&pi->list);
			free (pi);
		}
	
		qb_list_del (&cpg_iteration_instance->list);
		hdb_handle_destroy (&cpg_iteration_handle_t_db, cpg_iteration_instance->handle);
	}
	
	static void cpg_pd_finalize (struct cpg_pd *cpd)
	{
		struct qb_list_head *iter, *tmp_iter;
		struct cpg_iteration_instance *cpii;
	
		zcb_all_free(cpd);
		qb_list_for_each_safe(iter, tmp_iter, &(cpd->iteration_instance_list_head)) {
			cpii = qb_list_entry (iter, struct cpg_iteration_instance, list);
	
			cpg_iteration_instance_finalize (cpii);
		}
	
		qb_list_del (&cpd->list);
	}
	
	static int cpg_lib_exit_fn (void *conn)
	{
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
	
		log_printf(LOGSYS_LEVEL_DEBUG, "exit_fn for conn=%p", conn);
	
		if (cpd->group_name.length > 0 && cpd->cpd_state != CPD_STATE_LEAVE_STARTED) {
			cpg_node_joinleave_send (cpd->pid, &cpd->group_name,
					MESSAGE_REQ_EXEC_CPG_PROCLEAVE, CONFCHG_CPG_REASON_PROCDOWN);
		}
	
		cpg_pd_finalize (cpd);
	
		api->ipc_refcnt_dec (conn);
		return (0);
	}
	
	static int cpg_node_joinleave_send (unsigned int pid, const mar_cpg_name_t *group_name, int fn, int reason)
	{
		struct req_exec_cpg_procjoin req_exec_cpg_procjoin;
		struct iovec req_exec_cpg_iovec;
		int result;
	
		memset(&req_exec_cpg_procjoin, 0, sizeof(req_exec_cpg_procjoin));
	
		memcpy(&req_exec_cpg_procjoin.group_name, group_name, sizeof(mar_cpg_name_t));
		req_exec_cpg_procjoin.pid = pid;
		req_exec_cpg_procjoin.reason = reason;
	
		req_exec_cpg_procjoin.header.size = sizeof(req_exec_cpg_procjoin);
		req_exec_cpg_procjoin.header.id = SERVICE_ID_MAKE(CPG_SERVICE, fn);
	
		req_exec_cpg_iovec.iov_base = (char *)&req_exec_cpg_procjoin;
		req_exec_cpg_iovec.iov_len = sizeof(req_exec_cpg_procjoin);
	
		result = api->totem_mcast (&req_exec_cpg_iovec, 1, TOTEM_AGREED);
	
		return (result);
	}
	
	/* Can byteswap join & leave messages */
	static void exec_cpg_procjoin_endian_convert (void *msg)
	{
		struct req_exec_cpg_procjoin *req_exec_cpg_procjoin = msg;
	
		req_exec_cpg_procjoin->pid = swab32(req_exec_cpg_procjoin->pid);
		swab_mar_cpg_name_t (&req_exec_cpg_procjoin->group_name);
		req_exec_cpg_procjoin->reason = swab32(req_exec_cpg_procjoin->reason);
	}
	
	static void exec_cpg_joinlist_endian_convert (void *msg_v)
	{
		char *msg = msg_v;
		struct qb_ipc_response_header *res = (struct qb_ipc_response_header *)msg;
		struct join_list_entry *jle = (struct join_list_entry *)(msg + sizeof(struct qb_ipc_response_header));
	
		swab_mar_int32_t (&res->size);
	
		while ((const char*)jle < msg + res->size) {
			jle->pid = swab32(jle->pid);
			swab_mar_cpg_name_t (&jle->group_name);
			jle++;
		}
	}
	
	static void exec_cpg_downlist_endian_convert_old (void *msg)
	{
	}
	
	static void exec_cpg_downlist_endian_convert (void *msg)
	{
		struct req_exec_cpg_downlist *req_exec_cpg_downlist = msg;
		unsigned int i;
	
		req_exec_cpg_downlist->left_nodes = swab32(req_exec_cpg_downlist->left_nodes);
		req_exec_cpg_downlist->old_members = swab32(req_exec_cpg_downlist->old_members);
	
		for (i = 0; i < req_exec_cpg_downlist->left_nodes; i++) {
			req_exec_cpg_downlist->nodeids[i] = swab32(req_exec_cpg_downlist->nodeids[i]);
		}
	}
	
	
	static void exec_cpg_mcast_endian_convert (void *msg)
	{
		struct req_exec_cpg_mcast *req_exec_cpg_mcast = msg;
	
		swab_coroipc_request_header_t (&req_exec_cpg_mcast->header);
		swab_mar_cpg_name_t (&req_exec_cpg_mcast->group_name);
		req_exec_cpg_mcast->pid = swab32(req_exec_cpg_mcast->pid);
		req_exec_cpg_mcast->msglen = swab32(req_exec_cpg_mcast->msglen);
		swab_mar_message_source_t (&req_exec_cpg_mcast->source);
	}
	
	static void exec_cpg_partial_mcast_endian_convert (void *msg)
	{
		struct req_exec_cpg_partial_mcast *req_exec_cpg_mcast = msg;
	
		swab_coroipc_request_header_t (&req_exec_cpg_mcast->header);
		swab_mar_cpg_name_t (&req_exec_cpg_mcast->group_name);
		req_exec_cpg_mcast->pid = swab32(req_exec_cpg_mcast->pid);
		req_exec_cpg_mcast->msglen = swab32(req_exec_cpg_mcast->msglen);
		req_exec_cpg_mcast->fraglen = swab32(req_exec_cpg_mcast->fraglen);
		req_exec_cpg_mcast->type = swab32(req_exec_cpg_mcast->type);
		swab_mar_message_source_t (&req_exec_cpg_mcast->source);
	}
	
	static struct process_info *process_info_find(const mar_cpg_name_t *group_name, uint32_t pid, unsigned int nodeid) {
		struct qb_list_head *iter;
	
		qb_list_for_each(iter, &process_info_list_head) {
			struct process_info *pi = qb_list_entry (iter, struct process_info, list);
	
			if (pi->pid == pid && pi->nodeid == nodeid &&
				mar_name_compare (&pi->group, group_name) == 0) {
					return pi;
			}
		}
	
		return NULL;
	}
	
	static void do_proc_join(
		const mar_cpg_name_t *name,
		uint32_t pid,
		unsigned int nodeid,
		int reason,
		qb_map_t *group_notify_map)
	{
		struct process_info *pi;
		struct process_info *pi_entry;
		mar_cpg_address_t notify_info;
		struct qb_list_head *list;
		struct qb_list_head *list_to_add = NULL;
		int size;
	
		if (process_info_find (name, pid, nodeid) != NULL) {
			return ;
	 	}
		pi = malloc (sizeof (struct process_info));
		if (!pi) {
			log_printf(LOGSYS_LEVEL_WARNING, "Unable to allocate process_info struct");
			return;
		}
		pi->nodeid = nodeid;
		pi->pid = pid;
		memcpy(&pi->group, name, sizeof(*name));
		qb_list_init(&pi->list);
	
		/*
		 * Insert new process in sorted order so synchronization works properly
		 */
		list_to_add = &process_info_list_head;
		qb_list_for_each(list, &process_info_list_head) {
			pi_entry = qb_list_entry(list, struct process_info, list);
			if (pi_entry->nodeid > pi->nodeid ||
				(pi_entry->nodeid == pi->nodeid && pi_entry->pid > pi->pid)) {
	
				break;
			}
			list_to_add = list;
		}
		qb_list_add (&pi->list, list_to_add);
	
		notify_info.pid = pi->pid;
		notify_info.nodeid = nodeid;
		notify_info.reason = reason;
	
		if (group_notify_map == NULL) {
			notify_lib_joinlist(&pi->group,
					    1, &notify_info,
					    0, NULL,
					    MESSAGE_RES_CPG_CONFCHG_CALLBACK);
		} else {
			struct join_list_confchg_data *jld = qb_map_get(group_notify_map, pi->group.value);
			if (jld == NULL) {
				jld = (struct join_list_confchg_data *)calloc(1, sizeof(struct join_list_confchg_data));
				memcpy(&jld->cpg_group, &pi->group, sizeof(mar_cpg_name_t));
				qb_map_put(group_notify_map, jld->cpg_group.value, jld);
			}
			size = jld->join_list_entries;
			jld->join_list[size].nodeid = notify_info.nodeid;
			jld->join_list[size].pid = notify_info.pid;
			jld->join_list[size].reason = notify_info.reason;
			jld->join_list_entries++;
		}
	}
	
	static void do_proc_leave(
		const mar_cpg_name_t *name,
		uint32_t pid,
		unsigned int nodeid,
		int reason)
	{
		struct process_info *pi;
		struct qb_list_head *iter, *tmp_iter;
		mar_cpg_address_t notify_info;
	
		notify_info.pid = pid;
		notify_info.nodeid = nodeid;
		notify_info.reason = reason;
	
		notify_lib_joinlist(name,
			0, NULL,
			1, &notify_info,
			MESSAGE_RES_CPG_CONFCHG_CALLBACK);
	
		qb_list_for_each_safe(iter, tmp_iter, &process_info_list_head) {
			pi = qb_list_entry(iter, struct process_info, list);
	
			if (pi->pid == pid && pi->nodeid == nodeid &&
				mar_name_compare (&pi->group, name)==0) {
				qb_list_del (&pi->list);
				free (pi);
			}
		}
	}
	
	static void message_handler_req_exec_cpg_downlist_old (
		const void *message,
		unsigned int nodeid)
	{
		log_printf (LOGSYS_LEVEL_DEBUG, "downlist OLD from node " CS_PRI_NODE_ID,
			nodeid);
	}
	
	static void message_handler_req_exec_cpg_downlist(
		const void *message,
		unsigned int nodeid)
	{
		const struct req_exec_cpg_downlist *req_exec_cpg_downlist = message;
	
		log_printf (LOGSYS_LEVEL_DEBUG, "downlist left_list: %d received",
				req_exec_cpg_downlist->left_nodes);
	}
	
	
	static void message_handler_req_exec_cpg_procjoin (
		const void *message,
		unsigned int nodeid)
	{
		const struct req_exec_cpg_procjoin *req_exec_cpg_procjoin = message;
	
		log_printf(LOGSYS_LEVEL_DEBUG, "got procjoin message from cluster node " CS_PRI_NODE_ID " (%s) for pid %u",
			nodeid,
			api->totem_ifaces_print(nodeid),
			(unsigned int)req_exec_cpg_procjoin->pid);
	
		do_proc_join (&req_exec_cpg_procjoin->group_name,
			req_exec_cpg_procjoin->pid, nodeid,
			CONFCHG_CPG_REASON_JOIN, NULL);
	}
	
	static void message_handler_req_exec_cpg_procleave (
		const void *message,
		unsigned int nodeid)
	{
		const struct req_exec_cpg_procjoin *req_exec_cpg_procjoin = message;
	
		log_printf(LOGSYS_LEVEL_DEBUG, "got procleave message from cluster node " CS_PRI_NODE_ID " (%s) for pid %u",
			nodeid,
			api->totem_ifaces_print(nodeid),
			(unsigned int)req_exec_cpg_procjoin->pid);
	
		do_proc_leave (&req_exec_cpg_procjoin->group_name,
			req_exec_cpg_procjoin->pid, nodeid,
			req_exec_cpg_procjoin->reason);
	}
	
	
	/* Got a proclist from another node */
	static void message_handler_req_exec_cpg_joinlist (
		const void *message_v,
		unsigned int nodeid)
	{
		const char *message = message_v;
		const struct qb_ipc_response_header *res = (const struct qb_ipc_response_header *)message;
		const struct join_list_entry *jle = (const struct join_list_entry *)(message + sizeof(struct qb_ipc_response_header));
		struct joinlist_msg *stored_msg;
	
		log_printf(LOGSYS_LEVEL_DEBUG, "got joinlist message from node " CS_PRI_NODE_ID,
			nodeid);
	
		while ((const char*)jle < message + res->size) {
			stored_msg = malloc (sizeof (struct joinlist_msg));
			memset(stored_msg, 0, sizeof (struct joinlist_msg));
			stored_msg->sender_nodeid = nodeid;
			stored_msg->pid = jle->pid;
			memcpy(&stored_msg->group_name, &jle->group_name, sizeof(mar_cpg_name_t));
			qb_list_init (&stored_msg->list);
			qb_list_add (&stored_msg->list, &joinlist_messages_head);
			jle++;
		}
	}
	
	static void message_handler_req_exec_cpg_mcast (
		const void *message,
		unsigned int nodeid)
	{
		const struct req_exec_cpg_mcast *req_exec_cpg_mcast = message;
		struct res_lib_cpg_deliver_callback res_lib_cpg_mcast;
		int msglen = req_exec_cpg_mcast->msglen;
		struct qb_list_head *iter, *pi_iter, *tmp_iter;
		struct cpg_pd *cpd;
		struct iovec iovec[2];
		int known_node = 0;
	
		res_lib_cpg_mcast.header.id = MESSAGE_RES_CPG_DELIVER_CALLBACK;
		res_lib_cpg_mcast.header.size = sizeof(res_lib_cpg_mcast) + msglen;
		res_lib_cpg_mcast.msglen = msglen;
		res_lib_cpg_mcast.pid = req_exec_cpg_mcast->pid;
		res_lib_cpg_mcast.nodeid = nodeid;
	
		memcpy(&res_lib_cpg_mcast.group_name, &req_exec_cpg_mcast->group_name,
			sizeof(mar_cpg_name_t));
		iovec[0].iov_base = (void *)&res_lib_cpg_mcast;
		iovec[0].iov_len = sizeof (res_lib_cpg_mcast);
	
		iovec[1].iov_base = (char*)message+sizeof(*req_exec_cpg_mcast);
		iovec[1].iov_len = msglen;
	
		qb_list_for_each_safe(iter, tmp_iter, &cpg_pd_list_head) {
			cpd = qb_list_entry(iter, struct cpg_pd, list);
			if ((cpd->cpd_state == CPD_STATE_LEAVE_STARTED || cpd->cpd_state == CPD_STATE_JOIN_COMPLETED)
				&& (mar_name_compare (&cpd->group_name, &req_exec_cpg_mcast->group_name) == 0)) {
	
				if (!known_node) {
					/* Try to find, if we know the node */
					qb_list_for_each(pi_iter, &process_info_list_head) {
						struct process_info *pi = qb_list_entry (pi_iter, struct process_info, list);
	
						if (pi->nodeid == nodeid &&
							mar_name_compare (&pi->group, &req_exec_cpg_mcast->group_name) == 0) {
							known_node = 1;
							break;
						}
					}
				}
	
				if (!known_node) {
					log_printf(LOGSYS_LEVEL_WARNING, "Unknown node -> we will not deliver message");
					return ;
				}
	
				api->ipc_dispatch_iov_send (cpd->conn, iovec, 2);
			}
		}
	}
	
	static void message_handler_req_exec_cpg_partial_mcast (
		const void *message,
		unsigned int nodeid)
	{
		const struct req_exec_cpg_partial_mcast *req_exec_cpg_mcast = message;
		struct res_lib_cpg_partial_deliver_callback res_lib_cpg_mcast;
		int msglen = req_exec_cpg_mcast->fraglen;
		struct qb_list_head *iter, *pi_iter, *tmp_iter;
		struct cpg_pd *cpd;
		struct iovec iovec[2];
		int known_node = 0;
	
		log_printf(LOGSYS_LEVEL_DEBUG, "Got fragmented message from node " CS_PRI_NODE_ID ", size = %d bytes\n", nodeid, msglen);
	
		res_lib_cpg_mcast.header.id = MESSAGE_RES_CPG_PARTIAL_DELIVER_CALLBACK;
		res_lib_cpg_mcast.header.size = sizeof(res_lib_cpg_mcast) + msglen;
		res_lib_cpg_mcast.fraglen = msglen;
		res_lib_cpg_mcast.msglen = req_exec_cpg_mcast->msglen;
		res_lib_cpg_mcast.pid = req_exec_cpg_mcast->pid;
		res_lib_cpg_mcast.type = req_exec_cpg_mcast->type;
		res_lib_cpg_mcast.nodeid = nodeid;
	
		memcpy(&res_lib_cpg_mcast.group_name, &req_exec_cpg_mcast->group_name,
		       sizeof(mar_cpg_name_t));
		iovec[0].iov_base = (void *)&res_lib_cpg_mcast;
		iovec[0].iov_len = sizeof (res_lib_cpg_mcast);
	
		iovec[1].iov_base = (char*)message+sizeof(*req_exec_cpg_mcast);
		iovec[1].iov_len = msglen;
	
		qb_list_for_each_safe(iter, tmp_iter, &cpg_pd_list_head) {
			cpd = qb_list_entry(iter, struct cpg_pd, list);
	
			if ((cpd->cpd_state == CPD_STATE_LEAVE_STARTED || cpd->cpd_state == CPD_STATE_JOIN_COMPLETED)
			    && (mar_name_compare (&cpd->group_name, &req_exec_cpg_mcast->group_name) == 0)) {
	
				if (!known_node) {
					/* Try to find, if we know the node */
					qb_list_for_each(pi_iter, &process_info_list_head) {
						struct process_info *pi = qb_list_entry (pi_iter, struct process_info, list);
	
						if (pi->nodeid == nodeid &&
						    mar_name_compare (&pi->group, &req_exec_cpg_mcast->group_name) == 0) {
							known_node = 1;
							break;
						}
					}
				}
	
				if (!known_node) {
					log_printf(LOGSYS_LEVEL_WARNING, "Unknown node -> we will not deliver message");
					return ;
				}
	
				api->ipc_dispatch_iov_send (cpd->conn, iovec, 2);
			}
		}
	}
	
	
	static int cpg_exec_send_downlist(void)
	{
		struct iovec iov;
	
		g_req_exec_cpg_downlist.header.id = SERVICE_ID_MAKE(CPG_SERVICE, MESSAGE_REQ_EXEC_CPG_DOWNLIST);
		g_req_exec_cpg_downlist.header.size = sizeof(struct req_exec_cpg_downlist);
	
		g_req_exec_cpg_downlist.old_members = my_old_member_list_entries;
	
		iov.iov_base = (void *)&g_req_exec_cpg_downlist;
		iov.iov_len = g_req_exec_cpg_downlist.header.size;
	
		return (api->totem_mcast (&iov, 1, TOTEM_AGREED));
	}
	
	static int cpg_exec_send_joinlist(void)
	{
		int count = 0;
		struct qb_list_head *iter;
		struct qb_ipc_response_header *res;
		char *buf;
		size_t buf_size;
		struct join_list_entry *jle;
		struct iovec req_exec_cpg_iovec;
	
		qb_list_for_each(iter, &process_info_list_head) {
			struct process_info *pi = qb_list_entry (iter, struct process_info, list);
	
	 		if (pi->nodeid == api->totem_nodeid_get ()) {
	 			count++;
			}
		}
	
		/* Nothing to send */
		if (!count)
			return 0;
	
		buf_size = sizeof(struct qb_ipc_response_header) + sizeof(struct join_list_entry) * count;
		buf = alloca(buf_size);
		if (!buf) {
			log_printf(LOGSYS_LEVEL_WARNING, "Unable to allocate joinlist buffer");
			return -1;
		}
		memset(buf, 0, buf_size);
	
		jle = (struct join_list_entry *)(buf + sizeof(struct qb_ipc_response_header));
		res = (struct qb_ipc_response_header *)buf;
	
		qb_list_for_each(iter, &process_info_list_head) {
			struct process_info *pi = qb_list_entry (iter, struct process_info, list);
	
			if (pi->nodeid == api->totem_nodeid_get ()) {
				memcpy (&jle->group_name, &pi->group, sizeof (mar_cpg_name_t));
				jle->pid = pi->pid;
				jle++;
			}
		}
	
		res->id = SERVICE_ID_MAKE(CPG_SERVICE, MESSAGE_REQ_EXEC_CPG_JOINLIST);
		res->size = sizeof(struct qb_ipc_response_header)+sizeof(struct join_list_entry) * count;
	
		req_exec_cpg_iovec.iov_base = buf;
		req_exec_cpg_iovec.iov_len = res->size;
	
		return (api->totem_mcast (&req_exec_cpg_iovec, 1, TOTEM_AGREED));
	}
	
	static int cpg_lib_init_fn (void *conn)
	{
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
		memset (cpd, 0, sizeof(struct cpg_pd));
		cpd->conn = conn;
		qb_list_add (&cpd->list, &cpg_pd_list_head);
	
		qb_list_init (&cpd->iteration_instance_list_head);
		qb_list_init (&cpd->zcb_mapped_list_head);
	
		api->ipc_refcnt_inc (conn);
		log_printf(LOGSYS_LEVEL_DEBUG, "lib_init_fn: conn=%p, cpd=%p", conn, cpd);
		return (0);
	}
	
	/* Join message from the library */
	static void message_handler_req_lib_cpg_join (void *conn, const void *message)
	{
		const struct req_lib_cpg_join *req_lib_cpg_join = message;
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
		struct res_lib_cpg_join res_lib_cpg_join;
		cs_error_t error = CS_OK;
		struct qb_list_head *iter;
	
		/* Test, if we don't have same pid and group name joined */
		qb_list_for_each(iter, &cpg_pd_list_head) {
			struct cpg_pd *cpd_item = qb_list_entry (iter, struct cpg_pd, list);
	
			if (cpd_item->pid == req_lib_cpg_join->pid &&
				mar_name_compare(&req_lib_cpg_join->group_name, &cpd_item->group_name) == 0) {
	
				/* We have same pid and group name joined -> return error */
				error = CS_ERR_EXIST;
				goto response_send;
			}
		}
	
		/*
		 * Same check must be done in process info list, because there may be not yet delivered
		 * leave of client.
		 */
		qb_list_for_each(iter, &process_info_list_head) {
			struct process_info *pi = qb_list_entry (iter, struct process_info, list);
	
			if (pi->nodeid == api->totem_nodeid_get () && pi->pid == req_lib_cpg_join->pid &&
			    mar_name_compare(&req_lib_cpg_join->group_name, &pi->group) == 0) {
				/* We have same pid and group name joined -> return error */
				error = CS_ERR_TRY_AGAIN;
				goto response_send;
			}
		}
	
		if (req_lib_cpg_join->group_name.length > CPG_MAX_NAME_LENGTH) {
			error = CS_ERR_NAME_TOO_LONG;
			goto response_send;
		}
	
		switch (cpd->cpd_state) {
		case CPD_STATE_UNJOINED:
			error = CS_OK;
			cpd->cpd_state = CPD_STATE_JOIN_STARTED;
			cpd->pid = req_lib_cpg_join->pid;
			cpd->flags = req_lib_cpg_join->flags;
			memcpy (&cpd->group_name, &req_lib_cpg_join->group_name,
				sizeof (cpd->group_name));
	
			cpg_node_joinleave_send (req_lib_cpg_join->pid,
				&req_lib_cpg_join->group_name,
				MESSAGE_REQ_EXEC_CPG_PROCJOIN, CONFCHG_CPG_REASON_JOIN);
			break;
		case CPD_STATE_LEAVE_STARTED:
			error = CS_ERR_BUSY;
			break;
		case CPD_STATE_JOIN_STARTED:
			error = CS_ERR_EXIST;
			break;
		case CPD_STATE_JOIN_COMPLETED:
			error = CS_ERR_EXIST;
			break;
		}
	
	response_send:
		res_lib_cpg_join.header.size = sizeof(res_lib_cpg_join);
	        res_lib_cpg_join.header.id = MESSAGE_RES_CPG_JOIN;
	        res_lib_cpg_join.header.error = error;
	        api->ipc_response_send (conn, &res_lib_cpg_join, sizeof(res_lib_cpg_join));
	}
	
	/* Leave message from the library */
	static void message_handler_req_lib_cpg_leave (void *conn, const void *message)
	{
		struct res_lib_cpg_leave res_lib_cpg_leave;
		cs_error_t error = CS_OK;
		struct req_lib_cpg_leave  *req_lib_cpg_leave = (struct req_lib_cpg_leave *)message;
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
	
		log_printf(LOGSYS_LEVEL_DEBUG, "got leave request on %p", conn);
	
		switch (cpd->cpd_state) {
		case CPD_STATE_UNJOINED:
			error = CS_ERR_NOT_EXIST;
			break;
		case CPD_STATE_LEAVE_STARTED:
			error = CS_ERR_NOT_EXIST;
			break;
		case CPD_STATE_JOIN_STARTED:
			error = CS_ERR_BUSY;
			break;
		case CPD_STATE_JOIN_COMPLETED:
			error = CS_OK;
			cpd->cpd_state = CPD_STATE_LEAVE_STARTED;
			cpg_node_joinleave_send (req_lib_cpg_leave->pid,
				&req_lib_cpg_leave->group_name,
				MESSAGE_REQ_EXEC_CPG_PROCLEAVE,
				CONFCHG_CPG_REASON_LEAVE);
			break;
		}
	
		/* send return */
		res_lib_cpg_leave.header.size = sizeof(res_lib_cpg_leave);
		res_lib_cpg_leave.header.id = MESSAGE_RES_CPG_LEAVE;
		res_lib_cpg_leave.header.error = error;
		api->ipc_response_send(conn, &res_lib_cpg_leave, sizeof(res_lib_cpg_leave));
	}
	
	/* Finalize message from library */
	static void message_handler_req_lib_cpg_finalize (
		void *conn,
		const void *message)
	{
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
		struct res_lib_cpg_finalize res_lib_cpg_finalize;
		cs_error_t error = CS_OK;
	
		log_printf (LOGSYS_LEVEL_DEBUG, "cpg finalize for conn=%p", conn);
	
		/*
		 * We will just remove cpd from list. After this call, connection will be
		 * closed on lib side, and cpg_lib_exit_fn will be called
		 */
		qb_list_del (&cpd->list);
		qb_list_init (&cpd->list);
	
		res_lib_cpg_finalize.header.size = sizeof (res_lib_cpg_finalize);
		res_lib_cpg_finalize.header.id = MESSAGE_RES_CPG_FINALIZE;
		res_lib_cpg_finalize.header.error = error;
	
		api->ipc_response_send (conn, &res_lib_cpg_finalize,
			sizeof (res_lib_cpg_finalize));
	}
	
	static int
	memory_map (
		const char *path,
		size_t bytes,
		void **buf)
	{
		int32_t fd;
		void *addr;
		int32_t res;
	
		fd = open (path, O_RDWR, 0600);
	
		unlink (path);
	
		if (fd == -1) {
			return (-1);
		}
	
		res = ftruncate (fd, bytes);
		if (res == -1) {
			goto error_close_unlink;
		}
	
		addr = mmap (NULL, bytes, PROT_READ | PROT_WRITE,
			MAP_SHARED, fd, 0);
	
		if (addr == MAP_FAILED) {
			goto error_close_unlink;
		}
	#ifdef MADV_NOSYNC
		madvise(addr, bytes, MADV_NOSYNC);
	#endif
	
		res = close (fd);
		if (res) {
			munmap (addr, bytes);
			return (-1);
		}
		*buf = addr;
		return (0);
	
	error_close_unlink:
		close (fd);
		unlink(path);
		return -1;
	}
	
	static inline int zcb_alloc (
		struct cpg_pd *cpd,
		const char *path_to_file,
		size_t size,
		void **addr)
	{
		struct zcb_mapped *zcb_mapped;
		unsigned int res;
	
		zcb_mapped = malloc (sizeof (struct zcb_mapped));
		if (zcb_mapped == NULL) {
			return (-1);
		}
	
		res = memory_map (
			path_to_file,
			size,
			addr);
		if (res == -1) {
			free (zcb_mapped);
			return (-1);
		}
	
		qb_list_init (&zcb_mapped->list);
		zcb_mapped->addr = *addr;
		zcb_mapped->size = size;
		qb_list_add_tail (&zcb_mapped->list, &cpd->zcb_mapped_list_head);
		return (0);
	}
	
	
	static inline int zcb_free (struct zcb_mapped *zcb_mapped)
	{
		int res;
	
		res = munmap (zcb_mapped->addr, zcb_mapped->size);
		qb_list_del (&zcb_mapped->list);
		free (zcb_mapped);
		return (res);
	}
	
	static inline int zcb_by_addr_free (struct cpg_pd *cpd, void *addr)
	{
		struct qb_list_head *list, *tmp_iter;
		struct zcb_mapped *zcb_mapped;
		int res = 0;
	
		qb_list_for_each_safe(list, tmp_iter, &(cpd->zcb_mapped_list_head)) {
			zcb_mapped = qb_list_entry (list, struct zcb_mapped, list);
	
			if (zcb_mapped->addr == addr) {
				res = zcb_free (zcb_mapped);
				break;
			}
	
		}
		return (res);
	}
	
	static inline int zcb_all_free (
		struct cpg_pd *cpd)
	{
		struct qb_list_head *list, *tmp_iter;
		struct zcb_mapped *zcb_mapped;
	
		qb_list_for_each_safe(list, tmp_iter, &(cpd->zcb_mapped_list_head)) {
			zcb_mapped = qb_list_entry (list, struct zcb_mapped, list);
	
			zcb_free (zcb_mapped);
		}
		return (0);
	}
	
	union u {
		uint64_t server_addr;
		void *server_ptr;
	};
	
	static uint64_t void2serveraddr (void *server_ptr)
	{
		union u u;
	

		u.server_ptr = server_ptr;

		return (u.server_addr);
	}
	
	static void *serveraddr2void (uint64_t server_addr)
	{
		union u u;
	
		u.server_addr = server_addr;
		return (u.server_ptr);
	};
	
	static void message_handler_req_lib_cpg_zc_alloc (
		void *conn,
		const void *message)
	{
		mar_req_coroipcc_zc_alloc_t *hdr = (mar_req_coroipcc_zc_alloc_t *)message;
		struct qb_ipc_response_header res_header;
		void *addr = NULL;
		struct coroipcs_zc_header *zc_header;
		unsigned int res;
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
	
		log_printf(LOGSYS_LEVEL_DEBUG, "path: %s", hdr->path_to_file);
	
		res = zcb_alloc (cpd, hdr->path_to_file, hdr->map_size,
			&addr);
		assert(res == 0);
	
		zc_header = (struct coroipcs_zc_header *)addr;
		zc_header->server_address = void2serveraddr(addr);
	
		res_header.size = sizeof (struct qb_ipc_response_header);
		res_header.id = 0;
		api->ipc_response_send (conn,
			&res_header,
			res_header.size);
	}
	
	static void message_handler_req_lib_cpg_zc_free (
		void *conn,
		const void *message)
	{
		mar_req_coroipcc_zc_free_t *hdr = (mar_req_coroipcc_zc_free_t *)message;
		struct qb_ipc_response_header res_header;
		void *addr = NULL;
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
	
		log_printf(LOGSYS_LEVEL_DEBUG, " free'ing");
	
		addr = serveraddr2void (hdr->server_address);
	
		zcb_by_addr_free (cpd, addr);
	
		res_header.size = sizeof (struct qb_ipc_response_header);
		res_header.id = 0;
		api->ipc_response_send (
			conn, &res_header,
			res_header.size);
	}
	
	/* Fragmented mcast message from the library */
	static void message_handler_req_lib_cpg_partial_mcast (void *conn, const void *message)
	{
		const struct req_lib_cpg_partial_mcast *req_lib_cpg_mcast = message;
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
		mar_cpg_name_t group_name = cpd->group_name;
	
		struct iovec req_exec_cpg_iovec[2];
		struct req_exec_cpg_partial_mcast req_exec_cpg_mcast;
		struct res_lib_cpg_partial_send res_lib_cpg_partial_send;
		int msglen = req_lib_cpg_mcast->fraglen;
		int result;
		cs_error_t error = CS_ERR_NOT_EXIST;
	
		log_printf(LOGSYS_LEVEL_TRACE, "got fragmented mcast request on %p", conn);
		log_printf(LOGSYS_LEVEL_DEBUG, "Sending fragmented message size = %d bytes\n", msglen);
	
		switch (cpd->cpd_state) {
		case CPD_STATE_UNJOINED:
			error = CS_ERR_NOT_EXIST;
			break;
		case CPD_STATE_LEAVE_STARTED:
			error = CS_ERR_NOT_EXIST;
			break;
		case CPD_STATE_JOIN_STARTED:
			error = CS_OK;
			break;
		case CPD_STATE_JOIN_COMPLETED:
			error = CS_OK;
			break;
		}
	
		res_lib_cpg_partial_send.header.size = sizeof(res_lib_cpg_partial_send);
		res_lib_cpg_partial_send.header.id = MESSAGE_RES_CPG_PARTIAL_SEND;
	
		if (req_lib_cpg_mcast->type == LIBCPG_PARTIAL_FIRST) {
			cpd->initial_transition_counter = cpd->transition_counter;
		}
		if (cpd->transition_counter != cpd->initial_transition_counter) {
			error = CS_ERR_INTERRUPT;
		}
	
		if (error == CS_OK) {
			req_exec_cpg_mcast.header.size = sizeof(req_exec_cpg_mcast) + msglen;
			req_exec_cpg_mcast.header.id = SERVICE_ID_MAKE(CPG_SERVICE,
								       MESSAGE_REQ_EXEC_CPG_PARTIAL_MCAST);
			req_exec_cpg_mcast.pid = cpd->pid;
			req_exec_cpg_mcast.msglen = req_lib_cpg_mcast->msglen;
			req_exec_cpg_mcast.type = req_lib_cpg_mcast->type;
			req_exec_cpg_mcast.fraglen = req_lib_cpg_mcast->fraglen;
			api->ipc_source_set (&req_exec_cpg_mcast.source, conn);
			memcpy(&req_exec_cpg_mcast.group_name, &group_name,
			       sizeof(mar_cpg_name_t));
	
			req_exec_cpg_iovec[0].iov_base = (char *)&req_exec_cpg_mcast;
			req_exec_cpg_iovec[0].iov_len = sizeof(req_exec_cpg_mcast);
			req_exec_cpg_iovec[1].iov_base = (char *)&req_lib_cpg_mcast->message;
			req_exec_cpg_iovec[1].iov_len = msglen;
	
			result = api->totem_mcast (req_exec_cpg_iovec, 2, TOTEM_AGREED);
			assert(result == 0);
		} else {
			log_printf(LOGSYS_LEVEL_ERROR, "*** %p can't mcast to group %s state:%d, error:%d",
				   conn, group_name.value, cpd->cpd_state, error);
		}
	
		res_lib_cpg_partial_send.header.error = error;
		api->ipc_response_send (conn, &res_lib_cpg_partial_send,
					sizeof (res_lib_cpg_partial_send));
	}
	
	/* Mcast message from the library */
	static void message_handler_req_lib_cpg_mcast (void *conn, const void *message)
	{
		const struct req_lib_cpg_mcast *req_lib_cpg_mcast = message;
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
		mar_cpg_name_t group_name = cpd->group_name;
	
		struct iovec req_exec_cpg_iovec[2];
		struct req_exec_cpg_mcast req_exec_cpg_mcast;
		int msglen = req_lib_cpg_mcast->msglen;
		int result;
		cs_error_t error = CS_ERR_NOT_EXIST;
	
		log_printf(LOGSYS_LEVEL_TRACE, "got mcast request on %p", conn);
	
		switch (cpd->cpd_state) {
		case CPD_STATE_UNJOINED:
			error = CS_ERR_NOT_EXIST;
			break;
		case CPD_STATE_LEAVE_STARTED:
			error = CS_ERR_NOT_EXIST;
			break;
		case CPD_STATE_JOIN_STARTED:
			error = CS_OK;
			break;
		case CPD_STATE_JOIN_COMPLETED:
			error = CS_OK;
			break;
		}
	
		if (error == CS_OK) {
			memset(&req_exec_cpg_mcast, 0, sizeof(req_exec_cpg_mcast));
	
			req_exec_cpg_mcast.header.size = sizeof(req_exec_cpg_mcast) + msglen;
			req_exec_cpg_mcast.header.id = SERVICE_ID_MAKE(CPG_SERVICE,
				MESSAGE_REQ_EXEC_CPG_MCAST);
			req_exec_cpg_mcast.pid = cpd->pid;
			req_exec_cpg_mcast.msglen = msglen;
			api->ipc_source_set (&req_exec_cpg_mcast.source, conn);
			memcpy(&req_exec_cpg_mcast.group_name, &group_name,
				sizeof(mar_cpg_name_t));
	
			req_exec_cpg_iovec[0].iov_base = (char *)&req_exec_cpg_mcast;
			req_exec_cpg_iovec[0].iov_len = sizeof(req_exec_cpg_mcast);
			req_exec_cpg_iovec[1].iov_base = (char *)&req_lib_cpg_mcast->message;
			req_exec_cpg_iovec[1].iov_len = msglen;
	
			result = api->totem_mcast (req_exec_cpg_iovec, 2, TOTEM_AGREED);
			assert(result == 0);
		} else {
			log_printf(LOGSYS_LEVEL_ERROR, "*** %p can't mcast to group %s state:%d, error:%d",
				conn, group_name.value, cpd->cpd_state, error);
		}
	}
	
	static void message_handler_req_lib_cpg_zc_execute (
		void *conn,
		const void *message)
	{
		mar_req_coroipcc_zc_execute_t *hdr = (mar_req_coroipcc_zc_execute_t *)message;
		struct qb_ipc_request_header *header;
		struct res_lib_cpg_mcast res_lib_cpg_mcast;
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
		struct iovec req_exec_cpg_iovec[2];
		struct req_exec_cpg_mcast req_exec_cpg_mcast;
		struct req_lib_cpg_mcast *req_lib_cpg_mcast;
		int result;
		cs_error_t error = CS_ERR_NOT_EXIST;
	
		log_printf(LOGSYS_LEVEL_TRACE, "got ZC mcast request on %p", conn);
	
		header = (struct qb_ipc_request_header *)(((char *)serveraddr2void(hdr->server_address) + sizeof (struct coroipcs_zc_header)));
		req_lib_cpg_mcast = (struct req_lib_cpg_mcast *)header;
	
		switch (cpd->cpd_state) {
		case CPD_STATE_UNJOINED:
			error = CS_ERR_NOT_EXIST;
			break;
		case CPD_STATE_LEAVE_STARTED:
			error = CS_ERR_NOT_EXIST;
			break;
		case CPD_STATE_JOIN_STARTED:
			error = CS_OK;
			break;
		case CPD_STATE_JOIN_COMPLETED:
			error = CS_OK;
			break;
		}
	
		res_lib_cpg_mcast.header.size = sizeof(res_lib_cpg_mcast);
		res_lib_cpg_mcast.header.id = MESSAGE_RES_CPG_MCAST;
		if (error == CS_OK) {
			req_exec_cpg_mcast.header.size = sizeof(req_exec_cpg_mcast) + req_lib_cpg_mcast->msglen;
			req_exec_cpg_mcast.header.id = SERVICE_ID_MAKE(CPG_SERVICE,
				MESSAGE_REQ_EXEC_CPG_MCAST);
			req_exec_cpg_mcast.pid = cpd->pid;
			req_exec_cpg_mcast.msglen = req_lib_cpg_mcast->msglen;
			api->ipc_source_set (&req_exec_cpg_mcast.source, conn);
			memcpy(&req_exec_cpg_mcast.group_name, &cpd->group_name,
				sizeof(mar_cpg_name_t));
	
			req_exec_cpg_iovec[0].iov_base = (char *)&req_exec_cpg_mcast;
			req_exec_cpg_iovec[0].iov_len = sizeof(req_exec_cpg_mcast);
			req_exec_cpg_iovec[1].iov_base = (char *)header + sizeof(struct req_lib_cpg_mcast);
			req_exec_cpg_iovec[1].iov_len = req_exec_cpg_mcast.msglen;
	
			result = api->totem_mcast (req_exec_cpg_iovec, 2, TOTEM_AGREED);
			if (result == 0) {
				res_lib_cpg_mcast.header.error = CS_OK;
			} else {
				res_lib_cpg_mcast.header.error = CS_ERR_TRY_AGAIN;
			}
		} else {
			res_lib_cpg_mcast.header.error = error;
		}
	
		api->ipc_response_send (conn, &res_lib_cpg_mcast,
			sizeof (res_lib_cpg_mcast));
	
	}
	
	static void message_handler_req_lib_cpg_membership (void *conn,
							    const void *message)
	{
		struct req_lib_cpg_membership_get *req_lib_cpg_membership_get =
			(struct req_lib_cpg_membership_get *)message;
		struct res_lib_cpg_membership_get res_lib_cpg_membership_get;
		struct qb_list_head *iter;
		int member_count = 0;
	
		res_lib_cpg_membership_get.header.id = MESSAGE_RES_CPG_MEMBERSHIP;
		res_lib_cpg_membership_get.header.error = CS_OK;
		res_lib_cpg_membership_get.header.size =
			sizeof (struct res_lib_cpg_membership_get);
	
		qb_list_for_each(iter, &process_info_list_head) {
			struct process_info *pi = qb_list_entry (iter, struct process_info, list);
			if (mar_name_compare (&pi->group, &req_lib_cpg_membership_get->group_name) == 0) {
				res_lib_cpg_membership_get.member_list[member_count].nodeid = pi->nodeid;
				res_lib_cpg_membership_get.member_list[member_count].pid = pi->pid;
				member_count += 1;
			}
		}
		res_lib_cpg_membership_get.member_count = member_count;
	
		api->ipc_response_send (conn, &res_lib_cpg_membership_get,
			sizeof (res_lib_cpg_membership_get));
	}
	
	static void message_handler_req_lib_cpg_local_get (void *conn,
							   const void *message)
	{
		struct res_lib_cpg_local_get res_lib_cpg_local_get;
	
		res_lib_cpg_local_get.header.size = sizeof (res_lib_cpg_local_get);
		res_lib_cpg_local_get.header.id = MESSAGE_RES_CPG_LOCAL_GET;
		res_lib_cpg_local_get.header.error = CS_OK;
		res_lib_cpg_local_get.local_nodeid = api->totem_nodeid_get ();
	
		api->ipc_response_send (conn, &res_lib_cpg_local_get,
			sizeof (res_lib_cpg_local_get));
	}
	
	static void message_handler_req_lib_cpg_iteration_initialize (
		void *conn,
		const void *message)
	{
		const struct req_lib_cpg_iterationinitialize *req_lib_cpg_iterationinitialize = message;
		struct cpg_pd *cpd = (struct cpg_pd *)api->ipc_private_data_get (conn);
		hdb_handle_t cpg_iteration_handle = 0;
		struct res_lib_cpg_iterationinitialize res_lib_cpg_iterationinitialize;
		struct qb_list_head *iter, *iter2;
		struct cpg_iteration_instance *cpg_iteration_instance;
		cs_error_t error = CS_OK;
		int res;
	
		log_printf (LOGSYS_LEVEL_DEBUG, "cpg iteration initialize");
	
		/* Because between calling this function and *next can be some operations which will
		 * change list, we must do full copy.
		 */
	
		/*
		 * Create new iteration instance
		 */
		res = hdb_handle_create (&cpg_iteration_handle_t_db, sizeof (struct cpg_iteration_instance),
				&cpg_iteration_handle);
	
		if (res != 0) {
			error = CS_ERR_NO_MEMORY;
			goto response_send;
		}
	
		res = hdb_handle_get (&cpg_iteration_handle_t_db, cpg_iteration_handle, (void *)&cpg_iteration_instance);
	
		if (res != 0) {
			error = CS_ERR_BAD_HANDLE;
			goto error_destroy;
		}
	
		qb_list_init (&cpg_iteration_instance->items_list_head);
		cpg_iteration_instance->handle = cpg_iteration_handle;
	
		/*
		 * Create copy of process_info list "grouped by" group name
		 */
		qb_list_for_each(iter, &process_info_list_head) {
			struct process_info *pi = qb_list_entry (iter, struct process_info, list);
			struct process_info *new_pi;
	
			if (req_lib_cpg_iterationinitialize->iteration_type == CPG_ITERATION_NAME_ONLY) {
				/*
				 * Try to find processed group name in our list new list
				 */
				int found = 0;
	
	                        qb_list_for_each(iter2, &(cpg_iteration_instance->items_list_head)) {
					 struct process_info *pi2 = qb_list_entry (iter2, struct process_info, list);
	
					 if (mar_name_compare (&pi2->group, &pi->group) == 0) {
						found = 1;
						break;
					 }
				}
	
				if (found) {
					/*
					 * We have this name in list -> don't add
					 */
					continue ;
				}
			} else if (req_lib_cpg_iterationinitialize->iteration_type == CPG_ITERATION_ONE_GROUP) {
				/*
				 * Test pi group name with request
				 */
				if (mar_name_compare (&pi->group, &req_lib_cpg_iterationinitialize->group_name) != 0)
					/*
					 * Not same -> don't add
					 */
					continue ;
			}
	
			new_pi = malloc (sizeof (struct process_info));
			if (!new_pi) {
				log_printf(LOGSYS_LEVEL_WARNING, "Unable to allocate process_info struct");
	
				error = CS_ERR_NO_MEMORY;
	
				goto error_put_destroy;
			}
	
			memcpy (new_pi, pi, sizeof (struct process_info));
			qb_list_init (&new_pi->list);
	
			if (req_lib_cpg_iterationinitialize->iteration_type == CPG_ITERATION_NAME_ONLY) {
				/*
				 * pid and nodeid -> undefined
				 */
				new_pi->pid = new_pi->nodeid = 0;
			}
	
			/*
			 * We will return list "grouped" by "group name", so try to find right place to add
			 */
			qb_list_for_each(iter2, &(cpg_iteration_instance->items_list_head)) {
				struct process_info *pi2 = qb_list_entry (iter2, struct process_info, list);
	
				if (mar_name_compare (&pi2->group, &pi->group) == 0) {
					break;
				}
			}
	
			qb_list_add (&new_pi->list, iter2);
		}
	
		/*
		 * Now we have a full "grouped by" copy of process_info list
		 */
	
		/*
		 * Add instance to current cpd list
		 */
		qb_list_init (&cpg_iteration_instance->list);
		qb_list_add (&cpg_iteration_instance->list, &cpd->iteration_instance_list_head);
	
		cpg_iteration_instance->current_pointer = &cpg_iteration_instance->items_list_head;
	
	error_put_destroy:
		hdb_handle_put (&cpg_iteration_handle_t_db, cpg_iteration_handle);
	error_destroy:
		if (error != CS_OK) {
			hdb_handle_destroy (&cpg_iteration_handle_t_db, cpg_iteration_handle);
		}
	
	response_send:
		res_lib_cpg_iterationinitialize.header.size = sizeof (res_lib_cpg_iterationinitialize);
		res_lib_cpg_iterationinitialize.header.id = MESSAGE_RES_CPG_ITERATIONINITIALIZE;
		res_lib_cpg_iterationinitialize.header.error = error;
		res_lib_cpg_iterationinitialize.iteration_handle = cpg_iteration_handle;
	
		api->ipc_response_send (conn, &res_lib_cpg_iterationinitialize,
			sizeof (res_lib_cpg_iterationinitialize));
	}
	
	static void message_handler_req_lib_cpg_iteration_next (
		void *conn,
		const void *message)
	{
		const struct req_lib_cpg_iterationnext *req_lib_cpg_iterationnext = message;
		struct res_lib_cpg_iterationnext res_lib_cpg_iterationnext;
		struct cpg_iteration_instance *cpg_iteration_instance;
		cs_error_t error = CS_OK;
		int res;
		struct process_info *pi;
	
		log_printf (LOGSYS_LEVEL_DEBUG, "cpg iteration next");
	
		res = hdb_handle_get (&cpg_iteration_handle_t_db,
				req_lib_cpg_iterationnext->iteration_handle,
				(void *)&cpg_iteration_instance);
	
		if (res != 0) {
			error = CS_ERR_LIBRARY;
			goto error_exit;
		}
	
		assert (cpg_iteration_instance);
	
		cpg_iteration_instance->current_pointer = cpg_iteration_instance->current_pointer->next;
	
		if (cpg_iteration_instance->current_pointer == &cpg_iteration_instance->items_list_head) {
			error = CS_ERR_NO_SECTIONS;
			goto error_put;
		}
	
		pi = qb_list_entry (cpg_iteration_instance->current_pointer, struct process_info, list);
	
		/*
		 * Copy iteration data
		 */
		res_lib_cpg_iterationnext.description.nodeid = pi->nodeid;
		res_lib_cpg_iterationnext.description.pid = pi->pid;
		memcpy (&res_lib_cpg_iterationnext.description.group,
				&pi->group,
				sizeof (mar_cpg_name_t));
	
	error_put:
		hdb_handle_put (&cpg_iteration_handle_t_db, req_lib_cpg_iterationnext->iteration_handle);
	error_exit:
		res_lib_cpg_iterationnext.header.size = sizeof (res_lib_cpg_iterationnext);
		res_lib_cpg_iterationnext.header.id = MESSAGE_RES_CPG_ITERATIONNEXT;
		res_lib_cpg_iterationnext.header.error = error;
	
		api->ipc_response_send (conn, &res_lib_cpg_iterationnext,
			sizeof (res_lib_cpg_iterationnext));
	}
	
	static void message_handler_req_lib_cpg_iteration_finalize (
		void *conn,
		const void *message)
	{
		const struct req_lib_cpg_iterationfinalize *req_lib_cpg_iterationfinalize = message;
		struct res_lib_cpg_iterationfinalize res_lib_cpg_iterationfinalize;
		struct cpg_iteration_instance *cpg_iteration_instance;
		cs_error_t error = CS_OK;
		int res;
	
		log_printf (LOGSYS_LEVEL_DEBUG, "cpg iteration finalize");
	
		res = hdb_handle_get (&cpg_iteration_handle_t_db,
				req_lib_cpg_iterationfinalize->iteration_handle,
				(void *)&cpg_iteration_instance);
	
		if (res != 0) {
			error = CS_ERR_LIBRARY;
			goto error_exit;
		}
	
		assert (cpg_iteration_instance);
	
		cpg_iteration_instance_finalize (cpg_iteration_instance);
		hdb_handle_put (&cpg_iteration_handle_t_db, cpg_iteration_instance->handle);
	
	error_exit:
		res_lib_cpg_iterationfinalize.header.size = sizeof (res_lib_cpg_iterationfinalize);
		res_lib_cpg_iterationfinalize.header.id = MESSAGE_RES_CPG_ITERATIONFINALIZE;
		res_lib_cpg_iterationfinalize.header.error = error;
	
		api->ipc_response_send (conn, &res_lib_cpg_iterationfinalize,
			sizeof (res_lib_cpg_iterationfinalize));
	}