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sys/net/route/nhop_var.h
- This file was added.
| /*- | |||||
| * 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 nexthop routing. | |||||
| * | |||||
| * Header is not intended to be included by the code external to the | |||||
| * routing subsystem. | |||||
| */ | |||||
| #ifndef _NET_ROUTE_NHOP_VAR_H_ | |||||
| #define _NET_ROUTE_NHOP_VAR_H_ | |||||
| static unsigned | |||||
| djb_hash(const unsigned char *h, const int len) | |||||
| { | |||||
| unsigned int result = 0; | |||||
| int i; | |||||
| for (i = 0; i < len; i++) | |||||
| result = 33 * result ^ h[i]; | |||||
| return (result); | |||||
| } | |||||
| /* define nhop hash table */ | |||||
| struct nhop_priv; | |||||
| CHT_SLIST_DEFINE(nhops, struct nhop_priv); | |||||
| /* produce hash value for an object */ | |||||
| #define nhops_hash_obj(_obj) hash_priv(_obj) | |||||
| /* compare two objects */ | |||||
| #define nhops_cmp(_one, _two) cmp_priv(_one, _two) | |||||
| /* next object accessor */ | |||||
| #define nhops_next(_obj) (_obj)->nh_next | |||||
| /* XXX: declare! */ | |||||
| /* define mpath hash table */ | |||||
| struct nhgrp_priv; | |||||
| CHT_SLIST_DEFINE(mpath, struct nhgrp_priv); | |||||
| struct nh_control { | |||||
| struct nhops_head nh_head; /* hash table head */ | |||||
| struct bitmask_head nh_idx_head; /* nhop index head */ | |||||
| struct mpath_head gr_head; /* nhgrp hash table head */ | |||||
| struct bitmask_head gr_idx_head; /* nhgrp index head */ | |||||
| struct rwlock nhop_lock; /* overall ctl lock */ | |||||
| struct rib_head *rh; /* pointer back to rnh */ | |||||
| }; | |||||
| #define NHOPS_WLOCK(ctl) rw_wlock(&(ctl)->nhop_lock) | |||||
| #define NHOPS_RLOCK(ctl) rw_rlock(&(ctl)->nhop_lock) | |||||
| #define NHOPS_WUNLOCK(ctl) rw_wunlock(&(ctl)->nhop_lock) | |||||
| #define NHOPS_RUNLOCK(ctl) rw_runlock(&(ctl)->nhop_lock) | |||||
| #define NHOPS_LOCK_INIT(ctl) rw_init(&(ctl)->nhop_lock, "ctl") | |||||
| #define NHOPS_LOCK_DESTROY(ctl) rw_destroy(&(ctl)->nhop_lock) | |||||
| #define NHOPS_WLOCK_ASSERT(ctl) rw_assert(&(ctl)->nhop_lock, RA_WLOCKED) | |||||
| /* Control plane-only nhop data */ | |||||
| struct nhop_object; | |||||
| struct nhop_priv { | |||||
| uint32_t nh_idx; /* nexthop index */ | |||||
| uint8_t nh_family; /* address family of the lookup */ | |||||
| uint16_t nh_type; /* nexthop type */ | |||||
| void *cb_func; /* function handling additional rewrite caps */ | |||||
| u_int nh_refcnt; /* number of references */ | |||||
| int rt_flags; /* routing flags for the control plane */ | |||||
| struct nhop_object *nh; /* backreference to the dataplane nhop */ | |||||
| struct nh_control *nh_control; /* backreference to the rnh */ | |||||
| struct nhop_priv *nh_next; /* hash table membership */ | |||||
| struct mtx nh_mtx; /* mutex */ | |||||
| struct epoch_context nh_epoch_ctx; /* epoch data for nhop */ | |||||
| }; | |||||
| #define NH_PRIV_LOCK_INIT(_priv) mtx_init(&(_priv)->nh_mtx, "nhop", NULL, MTX_DEF) | |||||
| #define NH_PRIV_LOCK(_priv) mtx_lock(&(_priv)->nh_mtx) | |||||
| #define NH_PRIV_UNLOCK(_priv) mtx_unlock(&(_priv)->nh_mtx) | |||||
| #define NH_PRIV_LOCK_DESTROY(_priv) mtx_destroy(&(_priv)->nh_mtx) | |||||
| #define NH_PRIV_LOCK_ASSERT(_priv) mtx_assert(&(_priv)->nh_mtx, MA_OWNED) | |||||
| #define NH_LOCK(_nh) NH_PRIV_LOCK((_nh)->nh_priv) | |||||
| #define NH_UNLOCK(_nh) NH_PRIV_UNLOCK((_nh)->nh_priv) | |||||
| #define NH_IS_PINNED(_nh) ((_nh)->nh_priv->rt_flags & RTF_PINNED) | |||||
| /* nhop.c */ | |||||
| struct nhop_priv *find_nhop(struct nh_control *ctl, struct nhop_priv *nh_priv); | |||||
| int link_nhop(struct nh_control *ctl, struct nhop_priv *nh_priv); | |||||
| struct nhop_priv *unlink_nhop(struct nh_control *ctl, struct nhop_priv *nh_priv); | |||||
| /* nhop_ctl.c */ | |||||
| void free_nhop(struct nhop_priv *nh_priv); | |||||
| int cmp_priv(const struct nhop_priv *_one, const struct nhop_priv *_two); | |||||
| /* mpath */ | |||||
| struct weightened_nhop; | |||||
| #endif | |||||