coroapi.h
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coroapi.h
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	/*
	* Copyright (c) 2008-2012 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.
	*/
	#ifndef COROAPI_H_DEFINED
	#define COROAPI_H_DEFINED

	#include <config.h>

	#include <stdio.h>
	#ifdef HAVE_SYS_UIO_H
	#include <sys/uio.h>
	#endif
	#include <corosync/hdb.h>
	#include <qb/qbloop.h>
	#include <corosync/swab.h>

	typedef struct {
	uint32_t nodeid __attribute__((aligned(8)));
	void *conn __attribute__((aligned(8)));
	} mar_message_source_t __attribute__((aligned(8)));

	static inline void swab_mar_message_source_t (mar_message_source_t *to_swab)
	{
	swab32 (to_swab->nodeid);
	/*
	* if it is from a byteswapped machine, then we can safely
	* ignore its conn info data structure since this is only
	* local to the machine
	*/
	to_swab->conn = NULL;
	}

	#ifndef TIMER_HANDLE_T
	typedef qb_loop_timer_handle corosync_timer_handle_t;
	#define TIMER_HANDLE_T 1
	#endif

	struct corosync_tpg_group {
	const void *group;
	size_t group_len;
	};

	#define TOTEMIP_ADDRLEN (sizeof(struct in6_addr))

	#define INTERFACE_MAX 2

	#ifndef MESSAGE_QUEUE_MAX
	#ifdef HAVE_SMALL_MEMORY_FOOTPRINT
	#define PROCESSOR_COUNT_MAX 16
	#define MESSAGE_SIZE_MAX 1024*64
	#define MESSAGE_QUEUE_MAX 512
	#else
	#define PROCESSOR_COUNT_MAX 384
	#define MESSAGE_SIZE_MAX 1024*1024
	#define MESSAGE_QUEUE_MAX ((4 * MESSAGE_SIZE_MAX) / totem_config->net_mtu)
	#endif /* HAVE_SMALL_MEMORY_FOOTPRINT */
	#endif /* MESSAGE_QUEUE_MAX */

	#define TOTEM_AGREED 0
	#define TOTEM_SAFE 1

	#define MILLI_2_NANO_SECONDS 1000000ULL

	#if !defined(TOTEM_IP_ADDRESS)
	struct totem_ip_address {
	unsigned int nodeid;
	unsigned short family;
	unsigned char addr[TOTEMIP_ADDRLEN];
	} __attribute__((packed));
	#endif

	#if !defined(MEMB_RING_ID)
	struct memb_ring_id {
	struct totem_ip_address rep;
	unsigned long long seq;
	} __attribute__((packed));
	#endif

	#if !defined(TOTEM_CONFIGURATION_TYPE)
	enum totem_configuration_type {
	TOTEM_CONFIGURATION_REGULAR,
	TOTEM_CONFIGURATION_TRANSITIONAL
	};
	#endif

	#if !defined(TOTEM_CALLBACK_TOKEN_TYPE)
	enum totem_callback_token_type {
	TOTEM_CALLBACK_TOKEN_RECEIVED = 1,
	TOTEM_CALLBACK_TOKEN_SENT = 2
	};
	#endif

	enum cs_lib_flow_control {
	CS_LIB_FLOW_CONTROL_REQUIRED = 1,
	CS_LIB_FLOW_CONTROL_NOT_REQUIRED = 2
	};
	#define corosync_lib_flow_control cs_lib_flow_control
	#define COROSYNC_LIB_FLOW_CONTROL_REQUIRED CS_LIB_FLOW_CONTROL_REQUIRED
	#define COROSYNC_LIB_FLOW_CONTROL_NOT_REQUIRED CS_LIB_FLOW_CONTROL_NOT_REQUIRED

	enum cs_lib_allow_inquorate {
	CS_LIB_DISALLOW_INQUORATE = 0, /* default */
	CS_LIB_ALLOW_INQUORATE = 1
	};

	#if !defined (COROSYNC_FLOW_CONTROL_STATE)
	enum cs_flow_control_state {
	CS_FLOW_CONTROL_STATE_DISABLED,
	CS_FLOW_CONTROL_STATE_ENABLED
	};
	#define corosync_flow_control_state cs_flow_control_state
	#define CS_FLOW_CONTROL_STATE_DISABLED CS_FLOW_CONTROL_STATE_DISABLED
	#define CS_FLOW_CONTROL_STATE_ENABLED CS_FLOW_CONTROL_STATE_ENABLED

	#endif /* COROSYNC_FLOW_CONTROL_STATE */

	typedef enum {
	COROSYNC_FATAL_ERROR_EXIT = -1,
	COROSYNC_LIBAIS_SOCKET = -6,
	COROSYNC_LIBAIS_BIND = -7,
	COROSYNC_READKEY = -8,
	COROSYNC_INVALID_CONFIG = -9,
	COROSYNC_DYNAMICLOAD = -12,
	COROSYNC_OUT_OF_MEMORY = -15,
	COROSYNC_FATAL_ERR = -16
	} cs_fatal_error_t;
	#define corosync_fatal_error_t cs_fatal_error_t;

	#ifndef QUORUM_H_DEFINED
	typedef void (quorum_callback_fn_t) (int quorate, void context);

	struct quorum_callin_functions {
	int (*quorate) (void);
	int (register_callback) (quorum_callback_fn_t callback_fn, void contexxt);
	int (unregister_callback) (quorum_callback_fn_t callback_fn, void context);
	};

	typedef void (*sync_callback_fn_t) (
	const unsigned int *view_list,
	size_t view_list_entries,
	int primary_designated,
	struct memb_ring_id *ring_id);

	#endif /* QUORUM_H_DEFINED */


	struct corosync_api_v1 {
	/*
	* Time and timer APIs
	*/
	int (*timer_add_duration) (
	unsigned long long nanoseconds_in_future,
	void *data,
	void (timer_nf) (void data),
	corosync_timer_handle_t *handle);

	int (*timer_add_absolute) (
	unsigned long long nanoseconds_from_epoch,
	void *data,
	void (timer_fn) (void data),
	corosync_timer_handle_t *handle);

	void (*timer_delete) (
	corosync_timer_handle_t timer_handle);

	unsigned long long (*timer_time_get) (void);

	unsigned long long (*timer_expire_time_get) (
	corosync_timer_handle_t timer_handle);

	/*
	* IPC APIs
	*/
	void (ipc_source_set) (mar_message_source_t source, void *conn);

	int (ipc_source_is_local) (const mar_message_source_t source);

	void (ipc_private_data_get) (void *conn);

	int (ipc_response_send) (void conn, const void *msg, size_t mlen);

	int (ipc_response_iov_send) (void conn,
	const struct iovec *iov, unsigned int iov_len);

	int (ipc_dispatch_send) (void conn, const void *msg, size_t mlen);

	int (ipc_dispatch_iov_send) (void conn,
	const struct iovec *iov, unsigned int iov_len);

	void (ipc_refcnt_inc) (void conn);

	void (ipc_refcnt_dec) (void conn);

	/*
	* Totem APIs
	*/
	unsigned int (*totem_nodeid_get) (void);

	int (*totem_family_get) (void);

	int (*totem_ring_reenable) (void);

	int (totem_mcast) (const struct iovec iovec,
	unsigned int iov_len, unsigned int guarantee);

	int (*totem_ifaces_get) (
	unsigned int nodeid,
	struct totem_ip_address *interfaces,
	unsigned int interfaces_size,
	char ***status,
	unsigned int *iface_count);

	const char (totem_ifaces_print) (unsigned int nodeid);

	const char (totem_ip_print) (const struct totem_ip_address *addr);

	int (totem_crypto_set) (const char cipher_type, const char *hash_type);

	int (*totem_callback_token_create) (
	void **handle_out,
	enum totem_callback_token_type type,
	int delete,
	int (*callback_fn) (enum totem_callback_token_type type,
	const void *),
	const void *data);

	/*
	* Totem open process groups API for those service engines
	* wanting their own groups
	*/
	int (*tpg_init) (
	void **instance,

	void (*deliver_fn) (
	unsigned int nodeid,
	const void *msg,
	unsigned int msg_len,
	int endian_conversion_required),

	void (*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));

	int (*tpg_exit) (
	void *instance);

	int (*tpg_join) (
	void *instance,
	const struct corosync_tpg_group *groups,
	size_t group_cnt);

	int (*tpg_leave) (
	void *instance,
	const struct corosync_tpg_group *groups,
	size_t group_cnt);

	int (*tpg_joined_mcast) (
	void *totempg_groups_instance,
	const struct iovec *iovec,
	unsigned int iov_len,
	int guarantee);

	int (*tpg_joined_reserve) (
	void *totempg_groups_instance,
	const struct iovec *iovec,
	unsigned int iov_len);

	int (*tpg_joined_release) (
	int reserved_msgs);

	int (*tpg_groups_mcast) (
	void *instance,
	int guarantee,
	const struct corosync_tpg_group *groups,
	size_t groups_cnt,
	const struct iovec *iovec,
	unsigned int iov_len);

	int (*tpg_groups_reserve) (
	void *instance,
	const struct corosync_tpg_group *groups,
	size_t groups_cnt,
	const struct iovec *iovec,
	unsigned int iov_len);

	int (*tpg_groups_release) (
	int reserved_msgs);

	int (*schedwrk_create) (
	hdb_handle_t *handle,
	int (schedwrk_fn) (const void *),
	const void *context);

	void (*schedwrk_destroy) (hdb_handle_t handle);

	int (*sync_request) (
	const char *service_name);

	/*
	* User plugin-callable functions for quorum
	*/
	int (*quorum_is_quorate) (void);
	int (quorum_register_callback) (quorum_callback_fn_t callback_fn, void context);
	int (quorum_unregister_callback) (quorum_callback_fn_t callback_fn, void context);

	/*
	* This one is for the quorum management plugin's use
	*/
	int (quorum_initialize)(struct quorum_callin_functions fns);

	/*
	* Plugin loading and unloading
	*/
	int (*plugin_interface_reference) (
	hdb_handle_t *handle,
	const char *iface_name,
	int version,
	void **interface,
	void *context);

	int (*plugin_interface_release) (hdb_handle_t handle);

	/*
	* Service loading and unloading APIs
	*/
	unsigned int (*service_link_and_init) (
	struct corosync_api_v1 *corosync_api_v1,
	const char *service_name,
	unsigned int service_ver);

	unsigned int (*service_unlink_and_exit) (
	struct corosync_api_v1 *corosync_api_v1,
	const char *service_name,
	unsigned int service_ver);

	/*
	* Error handling APIs
	*/
	void (*error_memory_failure) (void) __attribute__ ((noreturn));

	#define corosync_fatal_error(err) api->fatal_error ((err), __FILE__, __LINE__)
	void (*fatal_error) (cs_fatal_error_t err,
	const char *file,
	unsigned int line) __attribute__ ((noreturn));

	void (*shutdown_request) (void);

	void (*state_dump) (void);

	qb_loop_t (poll_handle_get) (void);

	void (totem_get_stats)(void);

	int (*schedwrk_create_nolock) (
	hdb_handle_t *handle,
	int (schedwrk_fn) (const void *),
	const void *context);

	int (poll_dispatch_add) (qb_loop_t handle,
	int fd,
	int events,
	void *data,

	int (*dispatch_fn) (int fd,
	int revents,
	void *data));


	int (*poll_dispatch_delete) (
	qb_loop_t * handle,
	int fd);

	};

	#define SERVICE_ID_MAKE(a,b) ( ((a)<<16) \| (b) )

	#define SERVICE_HANDLER_MAXIMUM_COUNT 64

	#define SERVICES_COUNT_MAX 64

	struct corosync_lib_handler {
	void (lib_handler_fn) (void conn, const void *msg);
	enum cs_lib_flow_control flow_control;
	};

	struct corosync_exec_handler {
	void (exec_handler_fn) (const void msg, unsigned int nodeid);
	void (exec_endian_convert_fn) (void msg);
	};

	struct corosync_service_engine_iface_ver0 {
	struct corosync_service_engine (corosync_get_service_engine_ver0) (void);
	};

	struct corosync_service_engine {
	const char *name;
	unsigned short id;
	unsigned short priority; /* Lower priority are loaded first, unloaded last.
	* 0 is a special case which always loaded _and_ unloaded last
	*/
	unsigned int private_data_size;
	enum cs_lib_flow_control flow_control;
	enum cs_lib_allow_inquorate allow_inquorate;
	char (exec_init_fn) (struct corosync_api_v1 *);
	int (*exec_exit_fn) (void);
	void (*exec_dump_fn) (void);
	int (lib_init_fn) (void conn);
	int (lib_exit_fn) (void conn);
	struct corosync_lib_handler *lib_engine;
	int lib_engine_count;
	struct corosync_exec_handler *exec_engine;
	int exec_engine_count;
	int (config_init_fn) (struct corosync_api_v1 );
	void (*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);
	void (*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 (*sync_process) (void);
	void (*sync_activate) (void);
	void (*sync_abort) (void);
	};

	#endif /* COROAPI_H_DEFINED */

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