cpg.h

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/*
 * Copyright (c) 2006-2019 Red Hat, Inc.
 *
 * All rights reserved.
 *
 * Author: Christine Caulfield (ccaulfi@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 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 COROSYNC_CPG_H_DEFINED
#define COROSYNC_CPG_H_DEFINED
 
#include <netinet/in.h>
#include <corosync/corotypes.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef uint64_t cpg_handle_t;
 
typedef uint64_t cpg_iteration_handle_t;
 
typedef enum {
        CPG_TYPE_UNORDERED, 
        CPG_TYPE_FIFO,      
        CPG_TYPE_AGREED,
        CPG_TYPE_SAFE       
} cpg_guarantee_t;
 
typedef enum {
        CPG_FLOW_CONTROL_DISABLED, 
        CPG_FLOW_CONTROL_ENABLED   
} cpg_flow_control_state_t;
 
 
typedef enum {
        CPG_REASON_UNDEFINED = 0,
        CPG_REASON_JOIN = 1,
        CPG_REASON_LEAVE = 2,
        CPG_REASON_NODEDOWN = 3,
        CPG_REASON_NODEUP = 4,
        CPG_REASON_PROCDOWN = 5
} cpg_reason_t;
 
typedef enum {
        CPG_ITERATION_NAME_ONLY = 1,
        CPG_ITERATION_ONE_GROUP = 2,
        CPG_ITERATION_ALL = 3,
} cpg_iteration_type_t;
 
typedef enum {
        CPG_MODEL_V1 = 1,
} cpg_model_t;
 
struct cpg_address {
        uint32_t nodeid;
        uint32_t pid;
        uint32_t reason;
};
 
#define CPG_MAX_NAME_LENGTH 128
struct cpg_name {
        uint32_t length;
        char value[CPG_MAX_NAME_LENGTH];
};
 
#define CPG_MEMBERS_MAX 128
 
struct cpg_iteration_description_t {
        struct cpg_name group;
        uint32_t nodeid;
        uint32_t pid;
};
 
struct cpg_ring_id {
        uint32_t nodeid;
        uint64_t seq;
};
 
typedef void (*cpg_deliver_fn_t) (
        cpg_handle_t handle,
        const struct cpg_name *group_name,
        uint32_t nodeid,
        uint32_t pid,
        void *msg,
        size_t msg_len);
 
typedef void (*cpg_confchg_fn_t) (
        cpg_handle_t handle,
        const struct cpg_name *group_name,
        const struct cpg_address *member_list, size_t member_list_entries,
        const struct cpg_address *left_list, size_t left_list_entries,
        const struct cpg_address *joined_list, size_t joined_list_entries);
 
typedef void (*cpg_totem_confchg_fn_t) (
        cpg_handle_t handle,
        struct cpg_ring_id ring_id,
        uint32_t member_list_entries,
        const uint32_t *member_list);
 
typedef struct {
        cpg_deliver_fn_t cpg_deliver_fn;
        cpg_confchg_fn_t cpg_confchg_fn;
} cpg_callbacks_t;
 
typedef struct {
        cpg_model_t model;
} cpg_model_data_t;
 
#define CPG_MODEL_V1_DELIVER_INITIAL_TOTEM_CONF 0x01
 
typedef struct {
        cpg_model_t model;
        cpg_deliver_fn_t cpg_deliver_fn;
        cpg_confchg_fn_t cpg_confchg_fn;
        cpg_totem_confchg_fn_t cpg_totem_confchg_fn;
        unsigned int flags;
} cpg_model_v1_data_t;
 
 
cs_error_t cpg_initialize (
        cpg_handle_t *handle,
        cpg_callbacks_t *callbacks);
 
cs_error_t cpg_model_initialize (
        cpg_handle_t *handle,
        cpg_model_t model,
        cpg_model_data_t *model_data,
        void *context);
 
cs_error_t cpg_finalize (
        cpg_handle_t handle);
 
cs_error_t cpg_fd_get (
        cpg_handle_t handle,
        int *fd);
 
cs_error_t cpg_max_atomic_msgsize_get (
        cpg_handle_t handle,
        uint32_t *size);
 
cs_error_t cpg_context_get (
        cpg_handle_t handle,
        void **context);
 
cs_error_t cpg_context_set (
        cpg_handle_t handle,
        void *context);
 
cs_error_t cpg_dispatch (
        cpg_handle_t handle,
        cs_dispatch_flags_t dispatch_types);
 
cs_error_t cpg_join (
        cpg_handle_t handle,
        const struct cpg_name *group);
 
cs_error_t cpg_leave (
        cpg_handle_t handle,
        const struct cpg_name *group);
 
cs_error_t cpg_mcast_joined (
        cpg_handle_t handle,
        cpg_guarantee_t guarantee,
        const struct iovec *iovec,
        unsigned int iov_len);
 
cs_error_t cpg_membership_get (
        cpg_handle_t handle,
        struct cpg_name *groupName,
        struct cpg_address *member_list,
        int *member_list_entries);
cs_error_t cpg_local_get (
        cpg_handle_t handle,
        unsigned int *local_nodeid);
 
cs_error_t cpg_flow_control_state_get (
        cpg_handle_t handle,
        cpg_flow_control_state_t *flow_control_enabled);
 
cs_error_t cpg_zcb_alloc (
        cpg_handle_t handle,
        size_t size,
        void **buffer);
 
cs_error_t cpg_zcb_free (
        cpg_handle_t handle,
        void *buffer);
 
cs_error_t cpg_zcb_mcast_joined (
        cpg_handle_t handle,
        cpg_guarantee_t guarantee,
        void *msg,
        size_t msg_len);
 
cs_error_t cpg_iteration_initialize(
        cpg_handle_t handle,
        cpg_iteration_type_t iteration_type,
        const struct cpg_name *group,
        cpg_iteration_handle_t *cpg_iteration_handle);
 
cs_error_t cpg_iteration_next(
        cpg_iteration_handle_t handle,
        struct cpg_iteration_description_t *description);
 
cs_error_t cpg_iteration_finalize (
        cpg_iteration_handle_t handle);
 
#ifdef __cplusplus
}
#endif
 
#endif /* COROSYNC_CPG_H_DEFINED */