include/corosync/quorum.h

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/*
 * Copyright (c) 2008-2020 Red Hat, Inc.
 *
 * All rights reserved.
 *
 * Author: Christine Caulfield (ccaulfi@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 Red Hat, 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_QUORUM_H_DEFINED
#define COROSYNC_QUORUM_H_DEFINED
 
#include <corosync/corotypes.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef enum {
        QUORUM_MODEL_V0 = 0,
        QUORUM_MODEL_V1 = 1,
} quorum_model_t;
 
typedef uint64_t quorum_handle_t;
 
struct quorum_ring_id {
        uint32_t nodeid;
        uint64_t seq;
};
 
typedef void (*quorum_notification_fn_t) (
        quorum_handle_t handle,
        uint32_t quorate,
        uint64_t ring_seq,
        uint32_t view_list_entries,
        uint32_t *view_list
        );
 
typedef void (*quorum_v1_quorum_notification_fn_t) (
        quorum_handle_t handle,
        uint32_t quorate,
        struct quorum_ring_id ring_id,
        uint32_t member_list_entries, const uint32_t *member_list
);
 
typedef void (*quorum_v1_nodelist_notification_fn_t) (
        quorum_handle_t handle,
        struct quorum_ring_id ring_id,
        uint32_t member_list_entries, const uint32_t *member_list,
        uint32_t joined_list_entries, const uint32_t *joined_list,
        uint32_t left_list_entries, const uint32_t *left_list
);
 
typedef struct {
        quorum_notification_fn_t quorum_notify_fn;
} quorum_callbacks_t;
 
typedef struct {
        quorum_model_t model;
} quorum_model_data_t;
 
typedef struct {
        quorum_model_t model;
        quorum_notification_fn_t quorum_notify_fn;
} quorum_model_v0_data_t;
 
typedef struct {
        quorum_model_t model;
        quorum_v1_quorum_notification_fn_t quorum_notify_fn;
        quorum_v1_nodelist_notification_fn_t nodelist_notify_fn;
} quorum_model_v1_data_t;
 
#define QUORUM_FREE     0
#define QUORUM_SET      1
 
cs_error_t quorum_initialize (
        quorum_handle_t *handle,
        quorum_callbacks_t *callbacks,
        uint32_t *quorum_type);
 
cs_error_t quorum_model_initialize (
        quorum_handle_t *handle,
        quorum_model_t model,
        quorum_model_data_t *model_data,
        uint32_t *quorum_type,
        void *context);
 
cs_error_t quorum_finalize (
        quorum_handle_t handle);
 
cs_error_t quorum_fd_get (
        quorum_handle_t handle,
        int *fd);
 
cs_error_t quorum_dispatch (
        quorum_handle_t handle,
        cs_dispatch_flags_t dispatch_types);
 
cs_error_t quorum_getquorate (
        quorum_handle_t handle,
        int *quorate);
 
cs_error_t quorum_trackstart (
        quorum_handle_t handle,
        unsigned int flags );
 
cs_error_t quorum_trackstop (
        quorum_handle_t handle);
 
cs_error_t quorum_context_set (
        quorum_handle_t handle,
        const void *context);
 
cs_error_t quorum_context_get (
        quorum_handle_t handle,
        const void **context);
 
#ifdef __cplusplus
}
#endif
 
#endif /* COROSYNC_QUORUM_H_DEFINED */