From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Graf Subject: [PATCH 2/6] [NET]: Rethink mark field in struct flowi Date: Thu, 09 Nov 2006 12:27:37 +0100 Message-ID: <20061109113245.573179984@lsx.localdomain> References: <20061109112735.577771022@lsx.localdomain> Cc: netdev@vger.kernel.org, Thomas Graf Return-path: Received: from postel.suug.ch ([194.88.212.233]:5584 "EHLO postel.suug.ch") by vger.kernel.org with ESMTP id S932815AbWKILdm (ORCPT ); Thu, 9 Nov 2006 06:33:42 -0500 To: davem@davemloft.net Content-Disposition: inline; filename=cleanup_flowi Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Now that all protocols have been made aware of the mark field it can be moved out of the union thus simplyfing its usage. The config options in the IPv4/IPv6/DECnet subsystems to enable respectively disable mark based routing only obfuscate the code with ifdefs, the cost for the additional comparison in the flow key is insignificant, and most distributions have all these options enabled by default anyway. Therefore it makes sense to remove the config options and enable mark based routing by default. Signed-off-by: Thomas Graf Index: net-2.6.20/include/net/flow.h =================================================================== --- net-2.6.20.orig/include/net/flow.h 2006-11-08 15:34:12.000000000 +0100 +++ net-2.6.20/include/net/flow.h 2006-11-08 16:12:32.000000000 +0100 @@ -18,7 +18,6 @@ struct { __be32 daddr; __be32 saddr; - __u32 fwmark; __u8 tos; __u8 scope; } ip4_u; @@ -26,28 +25,23 @@ struct { struct in6_addr daddr; struct in6_addr saddr; - __u32 fwmark; __be32 flowlabel; } ip6_u; struct { __le16 daddr; __le16 saddr; - __u32 fwmark; __u8 scope; } dn_u; } nl_u; #define fld_dst nl_u.dn_u.daddr #define fld_src nl_u.dn_u.saddr -#define fld_fwmark nl_u.dn_u.fwmark #define fld_scope nl_u.dn_u.scope #define fl6_dst nl_u.ip6_u.daddr #define fl6_src nl_u.ip6_u.saddr -#define fl6_fwmark nl_u.ip6_u.fwmark #define fl6_flowlabel nl_u.ip6_u.flowlabel #define fl4_dst nl_u.ip4_u.daddr #define fl4_src nl_u.ip4_u.saddr -#define fl4_fwmark nl_u.ip4_u.fwmark #define fl4_tos nl_u.ip4_u.tos #define fl4_scope nl_u.ip4_u.scope @@ -86,6 +80,7 @@ #ifdef CONFIG_IPV6_MIP6 #define fl_mh_type uli_u.mht.type #endif + __u32 mark; __u32 secid; /* used by xfrm; see secid.txt */ } __attribute__((__aligned__(BITS_PER_LONG/8))); Index: net-2.6.20/net/decnet/dn_route.c =================================================================== --- net-2.6.20.orig/net/decnet/dn_route.c 2006-11-08 16:12:30.000000000 +0100 +++ net-2.6.20/net/decnet/dn_route.c 2006-11-08 16:12:32.000000000 +0100 @@ -269,9 +269,7 @@ { return ((fl1->nl_u.dn_u.daddr ^ fl2->nl_u.dn_u.daddr) | (fl1->nl_u.dn_u.saddr ^ fl2->nl_u.dn_u.saddr) | -#ifdef CONFIG_DECNET_ROUTE_FWMARK - (fl1->nl_u.dn_u.fwmark ^ fl2->nl_u.dn_u.fwmark) | -#endif + (fl1->mark ^ fl2->mark) | (fl1->nl_u.dn_u.scope ^ fl2->nl_u.dn_u.scope) | (fl1->oif ^ fl2->oif) | (fl1->iif ^ fl2->iif)) == 0; @@ -882,10 +880,8 @@ { .daddr = oldflp->fld_dst, .saddr = oldflp->fld_src, .scope = RT_SCOPE_UNIVERSE, -#ifdef CONFIG_DECNET_ROUTE_FWMARK - .fwmark = oldflp->fld_fwmark -#endif } }, + .mark = oldflp->mark, .iif = loopback_dev.ifindex, .oif = oldflp->oif }; struct dn_route *rt = NULL; @@ -903,7 +899,7 @@ "dn_route_output_slow: dst=%04x src=%04x mark=%d" " iif=%d oif=%d\n", dn_ntohs(oldflp->fld_dst), dn_ntohs(oldflp->fld_src), - oldflp->fld_fwmark, loopback_dev.ifindex, oldflp->oif); + oldflp->mark, loopback_dev.ifindex, oldflp->oif); /* If we have an output interface, verify its a DECnet device */ if (oldflp->oif) { @@ -1108,9 +1104,7 @@ rt->fl.fld_dst = oldflp->fld_dst; rt->fl.oif = oldflp->oif; rt->fl.iif = 0; -#ifdef CONFIG_DECNET_ROUTE_FWMARK - rt->fl.fld_fwmark = oldflp->fld_fwmark; -#endif + rt->fl.mark = oldflp->mark; rt->rt_saddr = fl.fld_src; rt->rt_daddr = fl.fld_dst; @@ -1178,9 +1172,7 @@ rt = rcu_dereference(rt->u.rt_next)) { if ((flp->fld_dst == rt->fl.fld_dst) && (flp->fld_src == rt->fl.fld_src) && -#ifdef CONFIG_DECNET_ROUTE_FWMARK - (flp->fld_fwmark == rt->fl.fld_fwmark) && -#endif + (flp->mark == rt->fl.mark) && (rt->fl.iif == 0) && (rt->fl.oif == flp->oif)) { rt->u.dst.lastuse = jiffies; @@ -1235,10 +1227,8 @@ { .daddr = cb->dst, .saddr = cb->src, .scope = RT_SCOPE_UNIVERSE, -#ifdef CONFIG_DECNET_ROUTE_FWMARK - .fwmark = skb->mark -#endif } }, + .mark = skb->mark, .iif = skb->dev->ifindex }; struct dn_fib_res res = { .fi = NULL, .type = RTN_UNREACHABLE }; int err = -EINVAL; @@ -1385,7 +1375,7 @@ rt->fl.fld_dst = cb->dst; rt->fl.oif = 0; rt->fl.iif = in_dev->ifindex; - rt->fl.fld_fwmark = fl.fld_fwmark; + rt->fl.mark = fl.mark; rt->u.dst.flags = DST_HOST; rt->u.dst.neighbour = neigh; @@ -1457,9 +1447,7 @@ if ((rt->fl.fld_src == cb->src) && (rt->fl.fld_dst == cb->dst) && (rt->fl.oif == 0) && -#ifdef CONFIG_DECNET_ROUTE_FWMARK - (rt->fl.fld_fwmark == skb->mark) && -#endif + (rt->fl.mark == skb->mark) && (rt->fl.iif == cb->iif)) { rt->u.dst.lastuse = jiffies; dst_hold(&rt->u.dst); Index: net-2.6.20/net/decnet/dn_rules.c =================================================================== --- net-2.6.20.orig/net/decnet/dn_rules.c 2006-11-08 15:34:12.000000000 +0100 +++ net-2.6.20/net/decnet/dn_rules.c 2006-11-08 16:12:32.000000000 +0100 @@ -45,10 +45,8 @@ __le16 dstmask; __le16 srcmap; u8 flags; -#ifdef CONFIG_DECNET_ROUTE_FWMARK u32 fwmark; u32 fwmask; -#endif }; static struct dn_fib_rule default_rule = { @@ -131,10 +129,8 @@ ((daddr ^ r->dst) & r->dstmask)) return 0; -#ifdef CONFIG_DECNET_ROUTE_FWMARK - if ((r->fwmark ^ fl->fld_fwmark) & r->fwmask) + if ((r->fwmark ^ fl->mark) & r->fwmask) return 0; -#endif return 1; } @@ -169,7 +165,6 @@ if (tb[FRA_DST]) r->dst = nla_get_u16(tb[FRA_DST]); -#ifdef CONFIG_DECNET_ROUTE_FWMARK if (tb[FRA_FWMARK]) { r->fwmark = nla_get_u32(tb[FRA_FWMARK]); if (r->fwmark) @@ -181,7 +176,6 @@ if (tb[FRA_FWMASK]) r->fwmask = nla_get_u32(tb[FRA_FWMASK]); -#endif r->src_len = frh->src_len; r->srcmask = dnet_make_mask(r->src_len); @@ -203,13 +197,11 @@ if (frh->dst_len && (r->dst_len != frh->dst_len)) return 0; -#ifdef CONFIG_DECNET_ROUTE_FWMARK if (tb[FRA_FWMARK] && (r->fwmark != nla_get_u32(tb[FRA_FWMARK]))) return 0; if (tb[FRA_FWMASK] && (r->fwmask != nla_get_u32(tb[FRA_FWMASK]))) return 0; -#endif if (tb[FRA_SRC] && (r->src != nla_get_u16(tb[FRA_SRC]))) return 0; @@ -248,12 +240,10 @@ frh->src_len = r->src_len; frh->tos = 0; -#ifdef CONFIG_DECNET_ROUTE_FWMARK if (r->fwmark) NLA_PUT_U32(skb, FRA_FWMARK, r->fwmark); if (r->fwmask || r->fwmark) NLA_PUT_U32(skb, FRA_FWMASK, r->fwmask); -#endif if (r->dst_len) NLA_PUT_U16(skb, FRA_DST, r->dst); if (r->src_len) Index: net-2.6.20/net/ipv6/fib6_rules.c =================================================================== --- net-2.6.20.orig/net/ipv6/fib6_rules.c 2006-11-08 15:34:13.000000000 +0100 +++ net-2.6.20/net/ipv6/fib6_rules.c 2006-11-08 16:12:32.000000000 +0100 @@ -25,10 +25,8 @@ struct fib_rule common; struct rt6key src; struct rt6key dst; -#ifdef CONFIG_IPV6_ROUTE_FWMARK u32 fwmark; u32 fwmask; -#endif u8 tclass; }; @@ -130,10 +128,8 @@ if (r->tclass && r->tclass != ((ntohl(fl->fl6_flowlabel) >> 20) & 0xff)) return 0; -#ifdef CONFIG_IPV6_ROUTE_FWMARK - if ((r->fwmark ^ fl->fl6_fwmark) & r->fwmask) + if ((r->fwmark ^ fl->mark) & r->fwmask) return 0; -#endif return 1; } @@ -177,7 +173,6 @@ nla_memcpy(&rule6->dst.addr, tb[FRA_DST], sizeof(struct in6_addr)); -#ifdef CONFIG_IPV6_ROUTE_FWMARK if (tb[FRA_FWMARK]) { rule6->fwmark = nla_get_u32(tb[FRA_FWMARK]); if (rule6->fwmark) { @@ -192,7 +187,6 @@ if (tb[FRA_FWMASK]) rule6->fwmask = nla_get_u32(tb[FRA_FWMASK]); -#endif rule6->src.plen = frh->src_len; rule6->dst.plen = frh->dst_len; @@ -225,13 +219,11 @@ nla_memcmp(tb[FRA_DST], &rule6->dst.addr, sizeof(struct in6_addr))) return 0; -#ifdef CONFIG_IPV6_ROUTE_FWMARK if (tb[FRA_FWMARK] && (rule6->fwmark != nla_get_u32(tb[FRA_FWMARK]))) return 0; if (tb[FRA_FWMASK] && (rule6->fwmask != nla_get_u32(tb[FRA_FWMASK]))) return 0; -#endif return 1; } @@ -254,13 +246,11 @@ NLA_PUT(skb, FRA_SRC, sizeof(struct in6_addr), &rule6->src.addr); -#ifdef CONFIG_IPV6_ROUTE_FWMARK if (rule6->fwmark) NLA_PUT_U32(skb, FRA_FWMARK, rule6->fwmark); if (rule6->fwmask || rule6->fwmark) NLA_PUT_U32(skb, FRA_FWMASK, rule6->fwmask); -#endif return 0; Index: net-2.6.20/net/ipv6/route.c =================================================================== --- net-2.6.20.orig/net/ipv6/route.c 2006-11-08 16:12:30.000000000 +0100 +++ net-2.6.20/net/ipv6/route.c 2006-11-08 16:12:32.000000000 +0100 @@ -710,12 +710,10 @@ .ip6_u = { .daddr = iph->daddr, .saddr = iph->saddr, -#ifdef CONFIG_IPV6_ROUTE_FWMARK - .fwmark = skb->mark, -#endif .flowlabel = (* (__be32 *) iph)&IPV6_FLOWINFO_MASK, }, }, + .mark = skb->mark, .proto = iph->nexthdr, }; Index: net-2.6.20/net/ipv4/route.c =================================================================== --- net-2.6.20.orig/net/ipv4/route.c 2006-11-08 16:12:30.000000000 +0100 +++ net-2.6.20/net/ipv4/route.c 2006-11-08 16:12:32.000000000 +0100 @@ -568,9 +568,7 @@ { return ((fl1->nl_u.ip4_u.daddr ^ fl2->nl_u.ip4_u.daddr) | (fl1->nl_u.ip4_u.saddr ^ fl2->nl_u.ip4_u.saddr) | -#ifdef CONFIG_IP_ROUTE_FWMARK - (fl1->nl_u.ip4_u.fwmark ^ fl2->nl_u.ip4_u.fwmark) | -#endif + (fl1->mark ^ fl2->mark) | (*(u16 *)&fl1->nl_u.ip4_u.tos ^ *(u16 *)&fl2->nl_u.ip4_u.tos) | (fl1->oif ^ fl2->oif) | @@ -1643,9 +1641,7 @@ rth->fl.fl4_dst = daddr; rth->rt_dst = daddr; rth->fl.fl4_tos = tos; -#ifdef CONFIG_IP_ROUTE_FWMARK - rth->fl.fl4_fwmark= skb->mark; -#endif + rth->fl.mark = skb->mark; rth->fl.fl4_src = saddr; rth->rt_src = saddr; #ifdef CONFIG_NET_CLS_ROUTE @@ -1789,9 +1785,7 @@ rth->fl.fl4_dst = daddr; rth->rt_dst = daddr; rth->fl.fl4_tos = tos; -#ifdef CONFIG_IP_ROUTE_FWMARK - rth->fl.fl4_fwmark= skb->mark; -#endif + rth->fl.mark = skb->mark; rth->fl.fl4_src = saddr; rth->rt_src = saddr; rth->rt_gateway = daddr; @@ -1920,10 +1914,8 @@ .saddr = saddr, .tos = tos, .scope = RT_SCOPE_UNIVERSE, -#ifdef CONFIG_IP_ROUTE_FWMARK - .fwmark = skb->mark -#endif } }, + .mark = skb->mark, .iif = dev->ifindex }; unsigned flags = 0; u32 itag = 0; @@ -2034,9 +2026,7 @@ rth->fl.fl4_dst = daddr; rth->rt_dst = daddr; rth->fl.fl4_tos = tos; -#ifdef CONFIG_IP_ROUTE_FWMARK - rth->fl.fl4_fwmark= skb->mark; -#endif + rth->fl.mark = skb->mark; rth->fl.fl4_src = saddr; rth->rt_src = saddr; #ifdef CONFIG_NET_CLS_ROUTE @@ -2113,9 +2103,7 @@ rth->fl.fl4_src == saddr && rth->fl.iif == iif && rth->fl.oif == 0 && -#ifdef CONFIG_IP_ROUTE_FWMARK - rth->fl.fl4_fwmark == skb->mark && -#endif + rth->fl.mark == skb->mark && rth->fl.fl4_tos == tos) { rth->u.dst.lastuse = jiffies; dst_hold(&rth->u.dst); @@ -2239,9 +2227,7 @@ rth->fl.fl4_tos = tos; rth->fl.fl4_src = oldflp->fl4_src; rth->fl.oif = oldflp->oif; -#ifdef CONFIG_IP_ROUTE_FWMARK - rth->fl.fl4_fwmark= oldflp->fl4_fwmark; -#endif + rth->fl.mark = oldflp->mark; rth->rt_dst = fl->fl4_dst; rth->rt_src = fl->fl4_src; rth->rt_iif = oldflp->oif ? : dev_out->ifindex; @@ -2385,10 +2371,8 @@ .scope = ((tos & RTO_ONLINK) ? RT_SCOPE_LINK : RT_SCOPE_UNIVERSE), -#ifdef CONFIG_IP_ROUTE_FWMARK - .fwmark = oldflp->fl4_fwmark -#endif } }, + .mark = oldflp->mark, .iif = loopback_dev.ifindex, .oif = oldflp->oif }; struct fib_result res; @@ -2583,9 +2567,7 @@ rth->fl.fl4_src == flp->fl4_src && rth->fl.iif == 0 && rth->fl.oif == flp->oif && -#ifdef CONFIG_IP_ROUTE_FWMARK - rth->fl.fl4_fwmark == flp->fl4_fwmark && -#endif + rth->fl.mark == flp->mark && !((rth->fl.fl4_tos ^ flp->fl4_tos) & (IPTOS_RT_MASK | RTO_ONLINK))) { Index: net-2.6.20/net/ipv4/fib_frontend.c =================================================================== --- net-2.6.20.orig/net/ipv4/fib_frontend.c 2006-11-08 15:34:12.000000000 +0100 +++ net-2.6.20/net/ipv4/fib_frontend.c 2006-11-08 16:12:32.000000000 +0100 @@ -768,8 +768,8 @@ { struct fib_result res; - struct flowi fl = { .nl_u = { .ip4_u = { .daddr = frn->fl_addr, - .fwmark = frn->fl_fwmark, + struct flowi fl = { .mark = frn->fl_fwmark, + .nl_u = { .ip4_u = { .daddr = frn->fl_addr, .tos = frn->fl_tos, .scope = frn->fl_scope } } }; if (tb) { Index: net-2.6.20/net/ipv4/netfilter.c =================================================================== --- net-2.6.20.orig/net/ipv4/netfilter.c 2006-11-08 16:12:30.000000000 +0100 +++ net-2.6.20/net/ipv4/netfilter.c 2006-11-08 16:12:32.000000000 +0100 @@ -27,9 +27,7 @@ fl.nl_u.ip4_u.saddr = iph->saddr; fl.nl_u.ip4_u.tos = RT_TOS(iph->tos); fl.oif = (*pskb)->sk ? (*pskb)->sk->sk_bound_dev_if : 0; -#ifdef CONFIG_IP_ROUTE_FWMARK - fl.nl_u.ip4_u.fwmark = (*pskb)->mark; -#endif + fl.mark = (*pskb)->mark; if (ip_route_output_key(&rt, &fl) != 0) return -1; Index: net-2.6.20/include/net/ip_mp_alg.h =================================================================== --- net-2.6.20.orig/include/net/ip_mp_alg.h 2006-11-08 15:34:12.000000000 +0100 +++ net-2.6.20/include/net/ip_mp_alg.h 2006-11-08 16:12:32.000000000 +0100 @@ -88,9 +88,7 @@ return flp1->fl4_dst == flp2->fl4_dst && flp1->fl4_src == flp2->fl4_src && flp1->oif == flp2->oif && -#ifdef CONFIG_IP_ROUTE_FWMARK - flp1->fl4_fwmark == flp2->fl4_fwmark && -#endif + flp1->mark == flp2->mark && !((flp1->fl4_tos ^ flp2->fl4_tos) & (IPTOS_RT_MASK | RTO_ONLINK)); } Index: net-2.6.20/net/ipv4/fib_rules.c =================================================================== --- net-2.6.20.orig/net/ipv4/fib_rules.c 2006-11-08 15:34:12.000000000 +0100 +++ net-2.6.20/net/ipv4/fib_rules.c 2006-11-08 16:12:32.000000000 +0100 @@ -44,10 +44,8 @@ __be32 srcmask; __be32 dst; __be32 dstmask; -#ifdef CONFIG_IP_ROUTE_FWMARK u32 fwmark; u32 fwmask; -#endif #ifdef CONFIG_NET_CLS_ROUTE u32 tclassid; #endif @@ -160,10 +158,8 @@ if (r->tos && (r->tos != fl->fl4_tos)) return 0; -#ifdef CONFIG_IP_ROUTE_FWMARK - if ((r->fwmark ^ fl->fl4_fwmark) & r->fwmask) + if ((r->fwmark ^ fl->mark) & r->fwmask) return 0; -#endif return 1; } @@ -220,7 +216,6 @@ if (tb[FRA_DST]) rule4->dst = nla_get_be32(tb[FRA_DST]); -#ifdef CONFIG_IP_ROUTE_FWMARK if (tb[FRA_FWMARK]) { rule4->fwmark = nla_get_u32(tb[FRA_FWMARK]); if (rule4->fwmark) @@ -232,7 +227,6 @@ if (tb[FRA_FWMASK]) rule4->fwmask = nla_get_u32(tb[FRA_FWMASK]); -#endif #ifdef CONFIG_NET_CLS_ROUTE if (tb[FRA_FLOW]) @@ -264,13 +258,11 @@ if (frh->tos && (rule4->tos != frh->tos)) return 0; -#ifdef CONFIG_IP_ROUTE_FWMARK if (tb[FRA_FWMARK] && (rule4->fwmark != nla_get_u32(tb[FRA_FWMARK]))) return 0; if (tb[FRA_FWMASK] && (rule4->fwmask != nla_get_u32(tb[FRA_FWMASK]))) return 0; -#endif #ifdef CONFIG_NET_CLS_ROUTE if (tb[FRA_FLOW] && (rule4->tclassid != nla_get_u32(tb[FRA_FLOW]))) @@ -296,13 +288,11 @@ frh->src_len = rule4->src_len; frh->tos = rule4->tos; -#ifdef CONFIG_IP_ROUTE_FWMARK if (rule4->fwmark) NLA_PUT_U32(skb, FRA_FWMARK, rule4->fwmark); if (rule4->fwmask || rule4->fwmark) NLA_PUT_U32(skb, FRA_FWMASK, rule4->fwmask); -#endif if (rule4->dst_len) NLA_PUT_BE32(skb, FRA_DST, rule4->dst); Index: net-2.6.20/net/ipv4/Kconfig =================================================================== --- net-2.6.20.orig/net/ipv4/Kconfig 2006-11-08 15:34:13.000000000 +0100 +++ net-2.6.20/net/ipv4/Kconfig 2006-11-08 16:12:32.000000000 +0100 @@ -104,13 +104,6 @@ If unsure, say N. -config IP_ROUTE_FWMARK - bool "IP: use netfilter MARK value as routing key" - depends on IP_MULTIPLE_TABLES && NETFILTER - help - If you say Y here, you will be able to specify different routes for - packets with different mark values (see iptables(8), MARK target). - config IP_ROUTE_MULTIPATH bool "IP: equal cost multipath" depends on IP_ADVANCED_ROUTER Index: net-2.6.20/net/ipv4/netfilter/iptable_mangle.c =================================================================== --- net-2.6.20.orig/net/ipv4/netfilter/iptable_mangle.c 2006-11-08 16:12:30.000000000 +0100 +++ net-2.6.20/net/ipv4/netfilter/iptable_mangle.c 2006-11-08 16:12:32.000000000 +0100 @@ -153,9 +153,7 @@ if (ret != NF_DROP && ret != NF_STOLEN && ret != NF_QUEUE && ((*pskb)->nh.iph->saddr != saddr || (*pskb)->nh.iph->daddr != daddr -#ifdef CONFIG_IP_ROUTE_FWMARK || (*pskb)->mark != mark -#endif || (*pskb)->nh.iph->tos != tos)) if (ip_route_me_harder(pskb, RTN_UNSPEC)) ret = NF_DROP; Index: net-2.6.20/net/decnet/Kconfig =================================================================== --- net-2.6.20.orig/net/decnet/Kconfig 2006-11-08 15:34:12.000000000 +0100 +++ net-2.6.20/net/decnet/Kconfig 2006-11-08 16:12:32.000000000 +0100 @@ -41,11 +41,3 @@ See for more information. -config DECNET_ROUTE_FWMARK - bool "DECnet: use FWMARK value as routing key (EXPERIMENTAL)" - depends on DECNET_ROUTER && NETFILTER - help - If you say Y here, you will be able to specify different routes for - packets with different FWMARK ("firewalling mark") values - (see ipchains(8), "-m" argument). - Index: net-2.6.20/net/ipv6/Kconfig =================================================================== --- net-2.6.20.orig/net/ipv6/Kconfig 2006-11-08 15:34:13.000000000 +0100 +++ net-2.6.20/net/ipv6/Kconfig 2006-11-08 16:12:32.000000000 +0100 @@ -196,10 +196,3 @@ If unsure, say N. -config IPV6_ROUTE_FWMARK - bool "IPv6: use netfilter MARK value as routing key" - depends on IPV6_MULTIPLE_TABLES && NETFILTER - ---help--- - If you say Y here, you will be able to specify different routes for - packets with different mark values (see iptables(8), MARK target). - --