FreeBSD/Linux Kernel Cross Reference
sys/net/route/nhgrp_var.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2020 Alexander V. Chernikov
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    
    /*
     * This header file contains private definitions for the nexthop groups.
     *
     * Header is not intended to be included by the code external to the
     * routing subsystem.
     */
    
    #ifndef _NET_ROUTE_NHGRP_VAR_H_
    #define _NET_ROUTE_NHGRP_VAR_H_
    
    /* nhgrp hash definition */
    /* produce hash value for an object */
    #define mpath_hash_obj(_obj)    (hash_nhgrp(_obj))
    /* compare two objects */
    #define mpath_cmp(_one, _two)   (cmp_nhgrp(_one, _two))
    /* next object accessor */
    #define mpath_next(_obj)        (_obj)->nhg_priv_next
    
    struct nhgrp_priv {
            uint32_t                nhg_idx;
            uint32_t                nhg_uidx;
            uint8_t                 nhg_nh_count;   /* number of items in nh_weights */
            uint8_t                 nhg_origin;     /* protocol which created the group */
            uint8_t                 nhg_spare[2];
            u_int                   nhg_refcount;   /* use refcount */
            u_int                   nhg_linked;     /* refcount(9), == 2 if linked to the list */
            struct nh_control       *nh_control;    /* parent control structure */
            struct nhgrp_priv       *nhg_priv_next;
            struct nhgrp_object     *nhg;
            struct epoch_context    nhg_epoch_ctx;  /* epoch data for nhop */
            struct weightened_nhop  nhg_nh_weights[0];
    };
    
    #define _NHGRP_PRIV(_src)        (&(_src)->nhops[(_src)->nhg_size])
    #define NHGRP_PRIV(_src)         ((struct nhgrp_priv *)_NHGRP_PRIV(_src))
    #define NHGRP_PRIV_CONST(_src)   ((const struct nhgrp_priv *)_NHGRP_PRIV(_src))
    
    /* nhgrp.c */
    bool nhgrp_ctl_alloc_default(struct nh_control *ctl, int malloc_flags);
    struct nhgrp_priv *find_nhgrp(struct nh_control *ctl, const struct nhgrp_priv *key);
    int link_nhgrp(struct nh_control *ctl, struct nhgrp_priv *grp_priv);
    struct nhgrp_priv *unlink_nhgrp(struct nh_control *ctl, struct nhgrp_priv *key);
    
    #endif
    

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