1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2020 Alexander V. Chernikov 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * This header file contains private definitions for the nexthop groups. 30 * 31 * Header is not intended to be included by the code external to the 32 * routing subsystem. 33 */ 34 35 #ifndef _NET_ROUTE_NHGRP_VAR_H_ 36 #define _NET_ROUTE_NHGRP_VAR_H_ 37 38 /* nhgrp hash definition */ 39 /* produce hash value for an object */ 40 #define mpath_hash_obj(_obj) (hash_nhgrp(_obj)) 41 /* compare two objects */ 42 #define mpath_cmp(_one, _two) (cmp_nhgrp(_one, _two)) 43 /* next object accessor */ 44 #define mpath_next(_obj) (_obj)->nhg_priv_next 45 46 struct nhgrp_priv { 47 uint32_t nhg_idx; 48 uint32_t nhg_uidx; 49 uint8_t nhg_nh_count; /* number of items in nh_weights */ 50 uint8_t nhg_origin; /* protocol which created the group */ 51 uint8_t nhg_spare[2]; 52 u_int nhg_refcount; /* use refcount */ 53 u_int nhg_linked; /* refcount(9), == 2 if linked to the list */ 54 struct nh_control *nh_control; /* parent control structure */ 55 struct nhgrp_priv *nhg_priv_next; 56 struct nhgrp_object *nhg; 57 struct epoch_context nhg_epoch_ctx; /* epoch data for nhop */ 58 struct weightened_nhop nhg_nh_weights[0]; 59 }; 60 61 #define _NHGRP_PRIV(_src) (&(_src)->nhops[(_src)->nhg_size]) 62 #define NHGRP_PRIV(_src) ((struct nhgrp_priv *)_NHGRP_PRIV(_src)) 63 #define NHGRP_PRIV_CONST(_src) ((const struct nhgrp_priv *)_NHGRP_PRIV(_src)) 64 65 /* nhgrp.c */ 66 bool nhgrp_ctl_alloc_default(struct nh_control *ctl, int malloc_flags); 67 struct nhgrp_priv *find_nhgrp(struct nh_control *ctl, const struct nhgrp_priv *key); 68 int link_nhgrp(struct nh_control *ctl, struct nhgrp_priv *grp_priv); 69 struct nhgrp_priv *unlink_nhgrp(struct nh_control *ctl, struct nhgrp_priv *key); 70 71 #endif 72 73