2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2020 Alexander V. Chernikov
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
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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
31 * This header file contains private definitions for the nexthop groups.
33 * Header is not intended to be included by the code external to the
37 #ifndef _NET_ROUTE_NHGRP_VAR_H_
38 #define _NET_ROUTE_NHGRP_VAR_H_
40 /* nhgrp hash definition */
41 /* produce hash value for an object */
42 #define mpath_hash_obj(_obj) (hash_nhgrp(_obj))
43 /* compare two objects */
44 #define mpath_cmp(_one, _two) (cmp_nhgrp(_one, _two))
45 /* next object accessor */
46 #define mpath_next(_obj) (_obj)->nhg_priv_next
50 uint8_t nhg_nh_count; /* number of items in nh_weights */
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];
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))
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);