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Remove RADIX_MPATH config option.

Browse Source 
ROUTE_MPATH is the new config option controlling new multipath routing
 implementation. Remove the last pieces of RADIX_MPATH-related code and
 the config option.

Reviewed by:	glebius
Differential Revision:	https://reviews.freebsd.org/D27244
This commit is contained in:
Alexander V. Chernikov 2020-11-29 19:43:33 +00:00
parent 2338da0373
commit d1d941c5b9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=368164
9 changed files with 1 additions and 460 deletions
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1
sys/conf/options
View File

@ -452,7 +452,6 @@ MROUTING opt_mrouting.h
NFSLOCKD
PCBGROUP opt_pcbgroup.h
PF_DEFAULT_TO_DROP opt_pf.h
RADIX_MPATH opt_mpath.h
ROUTE_MPATH opt_route.h
ROUTETABLES opt_route.h
RSS opt_rss.h

276
sys/net/radix_mpath.c
View File

@ -1,276 +0,0 @@
/* $KAME: radix_mpath.c,v 1.17 2004/11/08 10:29:39 itojun Exp $ */
/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 2001 WIDE Project.
* All rights reserved.
*
* 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.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
* THE AUTHORS DO NOT GUARANTEE THAT THIS SOFTWARE DOES NOT INFRINGE
* ANY OTHERS' INTELLECTUAL PROPERTIES. IN NO EVENT SHALL THE AUTHORS
* BE LIABLE FOR ANY INFRINGEMENT OF ANY OTHERS' INTELLECTUAL
* PROPERTIES.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_mpath.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/socket.h>
#include <sys/domain.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <net/radix.h>
#include <net/radix_mpath.h>
#include <sys/rmlock.h>
#include <net/route.h>
#include <net/route/nhop.h>
#include <net/route/route_var.h>
#include <net/route/nhop.h>
#include <net/if.h>
#include <net/if_var.h>
/*
* give some jitter to hash, to avoid synchronization between routers
*/
static uint32_t hashjitter;
int
rt_mpath_capable(struct rib_head *rnh)
{
return rnh->rnh_multipath;
}
int
rn_mpath_capable(struct radix_head *rh)
{
return (rt_mpath_capable((struct rib_head *)rh));
}
struct radix_node *
rn_mpath_next(struct radix_node *rn)
{
struct radix_node *next;
if (!rn->rn_dupedkey)
return NULL;
next = rn->rn_dupedkey;
if (rn->rn_mask == next->rn_mask)
return next;
else
return NULL;
}
uint32_t
rn_mpath_count(struct radix_node *rn)
{
uint32_t i = 0;
struct rtentry *rt;
while (rn != NULL) {
rt = (struct rtentry *)rn;
i += rt->rt_weight;
rn = rn_mpath_next(rn);
}
return (i);
}
struct rtentry *
rt_mpath_matchgate(struct rtentry *rt, struct sockaddr *gate)
{
struct radix_node *rn;
struct nhop_object *nh;
if (gate == NULL)
return (NULL);
/* beyond here, we use rn as the master copy */
rn = (struct radix_node *)rt;
do {
rt = (struct rtentry *)rn;
nh = rt->rt_nhop;
/*
* we are removing an address alias that has
* the same prefix as another address
* we need to compare the interface address because
* gateway is a special sockaddr_dl structure
*/
if (nh->gw_sa.sa_family == AF_LINK) {
if (!memcmp(nh->nh_ifa->ifa_addr, gate, gate->sa_len))
break;
}
/*
* Check for other options:
* 1) Routes with 'real' IPv4/IPv6 gateway
* 2) Loopback host routes (another AF_LINK/sockadd_dl check)
* */
if (nh->gw_sa.sa_len == gate->sa_len &&
!memcmp(&nh->gw_sa, gate, gate->sa_len))
break;
} while ((rn = rn_mpath_next(rn)) != NULL);
return (struct rtentry *)rn;
}
/*
* go through the chain and unlink "rt" from the list
* the caller will free "rt"
*/
int
rt_mpath_deldup(struct rtentry *headrt, struct rtentry *rt)
{
struct radix_node *t, *tt;
if (!headrt || !rt)
return (0);
t = (struct radix_node *)headrt;
tt = rn_mpath_next(t);
while (tt) {
if (tt == (struct radix_node *)rt) {
t->rn_dupedkey = tt->rn_dupedkey;
tt->rn_dupedkey = NULL;
tt->rn_flags &= ~RNF_ACTIVE;
tt[1].rn_flags &= ~RNF_ACTIVE;
return (1);
}
t = tt;
tt = rn_mpath_next((struct radix_node *)t);
}
return (0);
}
/*
* check if we have the same key/mask/gateway on the table already.
* Assume @rt rt_key host bits are cleared according to @netmask
*/
int
rt_mpath_conflict(struct rib_head *rnh, struct rtentry *rt,
struct sockaddr *netmask)
{
struct radix_node *rn, *rn1;
struct nhop_object *nh, *nh1;
struct rtentry *rt1;
rn = (struct radix_node *)rt;
rn1 = rnh->rnh_lookup(rt_key(rt), netmask, &rnh->head);
if (!rn1 || rn1->rn_flags & RNF_ROOT)
return (0);
/* key/mask are the same. compare gateway for all multipaths */
do {
rt1 = (struct rtentry *)rn1;
/* sanity: no use in comparing the same thing */
if (rn1 == rn)
continue;
nh = rt->rt_nhop;
nh1 = rt1->rt_nhop;
if (nh1->gw_sa.sa_family == AF_LINK) {
if (nh1->nh_ifa->ifa_addr->sa_len != nh->nh_ifa->ifa_addr->sa_len ||
bcmp(nh1->nh_ifa->ifa_addr, nh->nh_ifa->ifa_addr,
nh1->nh_ifa->ifa_addr->sa_len))
continue;
} else {
if (nh1->gw_sa.sa_len != nh->gw_sa.sa_len ||
bcmp(&nh1->gw_sa, &nh->gw_sa, nh1->gw_sa.sa_len))
continue;
}
/* all key/mask/gateway are the same. conflicting entry. */
return (EEXIST);
} while ((rn1 = rn_mpath_next(rn1)) != NULL);
return (0);
}
struct rtentry *
rt_mpath_selectrte(struct rtentry *rte, uint32_t hash)
{
struct radix_node *rn0, *rn;
uint32_t total_weight;
struct rtentry *rt;
int64_t weight;
/* beyond here, we use rn as the master copy */
rn0 = rn = (struct radix_node *)rte;
rt = rte;
/* gw selection by Modulo-N Hash (RFC2991) XXX need improvement? */
total_weight = rn_mpath_count(rn0);
hash += hashjitter;
hash %= total_weight;
for (weight = abs((int32_t)hash);
rt != NULL && weight >= rt->rt_weight;
weight -= (rt == NULL) ? 0 : rt->rt_weight) {
/* stay within the multipath routes */
if (rn->rn_dupedkey && rn->rn_mask != rn->rn_dupedkey->rn_mask)
break;
rn = rn->rn_dupedkey;
rt = (struct rtentry *)rn;
}
return (rt);
}
struct rtentry *
rt_mpath_select(struct rtentry *rte, uint32_t hash)
{
if (rn_mpath_next((struct radix_node *)rte) == NULL)
return (rte);
return (rt_mpath_selectrte(rte, hash));
}
void
rt_mpath_init_rnh(struct rib_head *rnh)
{
rnh->rnh_multipath = 1;
}
#ifdef RADIX_MPATH
static void
mpath_init(void)
{
hashjitter = arc4random();
}
SYSINIT(mpath_init, SI_SUB_LAST, SI_ORDER_ANY, mpath_init, NULL);
#endif

81
sys/net/radix_mpath.h
View File

@ -1,81 +0,0 @@
/* $KAME: radix_mpath.h,v 1.10 2004/11/06 15:44:28 itojun Exp $ */
/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 2001 WIDE Project.
* All rights reserved.
*
* 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.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
* THE AUTHORS DO NOT GUARANTEE THAT THIS SOFTWARE DOES NOT INFRINGE
* ANY OTHERS' INTELLECTUAL PROPERTIES. IN NO EVENT SHALL THE AUTHORS
* BE LIABLE FOR ANY INFRINGEMENT OF ANY OTHERS' INTELLECTUAL
* PROPERTIES.
*/
/* $FreeBSD$ */
#ifndef _NET_RADIX_MPATH_H_
#define _NET_RADIX_MPATH_H_
#ifdef _KERNEL
/*
* Radix tree API with multipath support
*/
struct route;
struct rtentry;
struct sockaddr;
struct rib_head;
int rt_mpath_capable(struct rib_head *);
int rn_mpath_capable(struct radix_head *);
struct radix_node *rn_mpath_next(struct radix_node *);
u_int32_t rn_mpath_count(struct radix_node *);
struct rtentry *rt_mpath_matchgate(struct rtentry *, struct sockaddr *);
int rt_mpath_conflict(struct rib_head *, struct rtentry *,
struct sockaddr *);
struct rtentry *rt_mpath_select(struct rtentry *, uint32_t);
struct rtentry *rt_mpath_selectrte(struct rtentry *, uint32_t);
int rt_mpath_deldup(struct rtentry *, struct rtentry *);
int rn4_mpath_inithead(void **, int, u_int);
int rn6_mpath_inithead(void **, int, u_int);
static inline struct rtentry *
rt_mpath_next(struct rtentry *rt)
{
struct radix_node *next, *rn;
rn = (struct radix_node *)rt;
if (!rn->rn_dupedkey)
return (NULL);
next = rn->rn_dupedkey;
if (rn->rn_mask == next->rn_mask)
return (struct rtentry *)next;
else
return (NULL);
}
#endif
#endif /* _NET_RADIX_MPATH_H_ */

85
sys/net/route.c
View File

@ -65,10 +65,6 @@
#include <net/route/nhop.h>
#include <net/vnet.h>
#ifdef RADIX_MPATH
#include <net/radix_mpath.h>
#endif
#include <netinet/in.h>
#include <netinet/ip_mroute.h>
@ -677,87 +673,6 @@ rt_print(char *buf, int buflen, struct rtentry *rt)
}
#endif
#ifdef RADIX_MPATH
/*
* Deletes key for single-path routes, unlinks rtentry with
* gateway specified in @info from multi-path routes.
*
* Returnes unlinked entry. In case of failure, returns NULL
* and sets @perror to ESRCH.
*/
struct radix_node *
rt_mpath_unlink(struct rib_head *rnh, struct rt_addrinfo *info,
struct rtentry *rto, int *perror)
{
/*
* if we got multipath routes, we require users to specify
* a matching RTAX_GATEWAY.
*/
struct rtentry *rt; // *rto = NULL;
struct radix_node *rn;
struct sockaddr *gw;
gw = info->rti_info[RTAX_GATEWAY];
rt = rt_mpath_matchgate(rto, gw);
if (rt == NULL) {
*perror = ESRCH;
return (NULL);
}
/*
* this is the first entry in the chain
*/
if (rto == rt) {
rn = rn_mpath_next((struct radix_node *)rt);
/*
* there is another entry, now it's active
*/
if (rn) {
rto = RNTORT(rn);
rto->rte_flags |= RTF_UP;
} else if (rt->rte_flags & RTF_GATEWAY) {
/*
* For gateway routes, we need to
* make sure that we we are deleting
* the correct gateway.
* rt_mpath_matchgate() does not
* check the case when there is only
* one route in the chain.
*/
if (gw &&
(rt->rt_nhop->gw_sa.sa_len != gw->sa_len ||
memcmp(&rt->rt_nhop->gw_sa, gw, gw->sa_len))) {
*perror = ESRCH;
return (NULL);
}
}
/*
* use the normal delete code to remove
* the first entry
*/
rn = rnh->rnh_deladdr(info->rti_info[RTAX_DST],
info->rti_info[RTAX_NETMASK],
&rnh->head);
if (rn != NULL) {
*perror = 0;
} else {
*perror = ESRCH;
}
return (rn);
}
/*
* if the entry is 2nd and on up
*/
if (rt_mpath_deldup(rto, rt) == 0)
panic ("rtrequest1: rt_mpath_deldup");
*perror = 0;
rn = (struct radix_node *)rt;
return (rn);
}
#endif
void
rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netmask)
{

4
sys/net/route/route_ctl.c
View File

@ -54,10 +54,6 @@ __FBSDID("$FreeBSD$");
#include <net/route/nhop_var.h>
#include <netinet/in.h>
#ifdef RADIX_MPATH
#include <net/radix_mpath.h>
#endif
#include <vm/uma.h>
/*

1
sys/net/route/route_ifaddrs.c
View File

@ -32,7 +32,6 @@
* $FreeBSD$
*/
#include "opt_mpath.h"
#include "opt_route.h"
#include <sys/param.h>

3
sys/net/rtsock.c
View File

@ -64,9 +64,6 @@
#include <net/route.h>
#include <net/route/route_ctl.h>
#include <net/route/route_var.h>
#ifdef RADIX_MPATH
#include <net/radix_mpath.h>
#endif
#include <net/vnet.h>
#include <netinet/in.h>

4
sys/netinet/ip_input.c
View File

@ -981,11 +981,7 @@ ip_forward(struct mbuf *m, int srcrt)
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_addr = ip->ip_dst;
#ifdef RADIX_MPATH
flowid = ntohl(ip->ip_src.s_addr ^ ip->ip_dst.s_addr);
#else
flowid = m->m_pkthdr.flowid;
#endif
ro.ro_nh = fib4_lookup(M_GETFIB(m), ip->ip_dst, 0, NHR_REF, flowid);
if (ro.ro_nh != NULL) {
ia = ifatoia(ro.ro_nh->nh_ifa);

6
sys/netinet6/nd6.c
View File

@ -1316,11 +1316,7 @@ nd6_is_new_addr_neighbor(const struct sockaddr_in6 *addr, struct ifnet *ifp)
* This is the case where multiple interfaces
* have the same prefix, but only one is installed
* into the routing table and that prefix entry
* is not the one being examined here. In the case
* where RADIX_MPATH is enabled, multiple route
* entries (of the same rt_key value) will be
* installed because the interface addresses all
* differ.
* is not the one being examined here.
*/
if (!IN6_ARE_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
&rt_key.sin6_addr))