000250be0d
Routing daemons such as bird need to know if they install certain route so they can clean it up on startup, as a form of achieving consistent state during the crash recovery. Currently they use combination of routing flags (RTF_PROTO1) to detect these routes when interacting via route(4) rtsock protocol. Netlink protocol has a special "rtm_protocol" field that is filled and checked by the route originator. To prepare for the upcoming netlink introduction, add ability to record origing to both nexthops and nexthop groups via <nhop|nhgrp>_<get|set>_origin() KPI. The actual calls will be used in the followup commits. MFC after: 1 month
75 lines
2.9 KiB
C
75 lines
2.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2020 Alexander V. Chernikov
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* This header file contains private definitions for the nexthop groups.
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*
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* Header is not intended to be included by the code external to the
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* routing subsystem.
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*/
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#ifndef _NET_ROUTE_NHGRP_VAR_H_
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#define _NET_ROUTE_NHGRP_VAR_H_
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/* nhgrp hash definition */
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/* produce hash value for an object */
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#define mpath_hash_obj(_obj) (hash_nhgrp(_obj))
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/* compare two objects */
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#define mpath_cmp(_one, _two) (cmp_nhgrp(_one, _two))
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/* next object accessor */
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#define mpath_next(_obj) (_obj)->nhg_priv_next
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struct nhgrp_priv {
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uint32_t nhg_idx;
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uint32_t nhg_uidx;
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uint8_t nhg_nh_count; /* number of items in nh_weights */
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uint8_t nhg_origin; /* protocol which created the group */
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uint8_t nhg_spare[2];
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u_int nhg_refcount; /* use refcount */
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u_int nhg_linked; /* refcount(9), == 2 if linked to the list */
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struct nh_control *nh_control; /* parent control structure */
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struct nhgrp_priv *nhg_priv_next;
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struct nhgrp_object *nhg;
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struct epoch_context nhg_epoch_ctx; /* epoch data for nhop */
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struct weightened_nhop nhg_nh_weights[0];
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};
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#define _NHGRP_PRIV(_src) (&(_src)->nhops[(_src)->nhg_size])
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#define NHGRP_PRIV(_src) ((struct nhgrp_priv *)_NHGRP_PRIV(_src))
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#define NHGRP_PRIV_CONST(_src) ((const struct nhgrp_priv *)_NHGRP_PRIV(_src))
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/* nhgrp.c */
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bool nhgrp_ctl_alloc_default(struct nh_control *ctl, int malloc_flags);
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struct nhgrp_priv *find_nhgrp(struct nh_control *ctl, const struct nhgrp_priv *key);
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int link_nhgrp(struct nh_control *ctl, struct nhgrp_priv *grp_priv);
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struct nhgrp_priv *unlink_nhgrp(struct nh_control *ctl, struct nhgrp_priv *key);
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#endif
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