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freebsd/sys/net/route/nhgrp_var.h
Alexander V. Chernikov db4ca19002 routing: add ability to store opaque indentifiers in nhops/nhgs
This is a pre-requisite for the direct nexthop/nexhop group operations
 via netlink.

MFC after:	2 weeks
2022-08-29 12:20:28 +00:00

74 lines
2.9 KiB
C

/*-
* 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_spare[3];
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