From e6a68af9e901df02e28f221dcf7c7d9462a9bd02 Mon Sep 17 00:00:00 2001 From: nbd Date: Sat, 16 Jun 2007 01:56:04 +0000 Subject: prepare for the transition to linux 2.6.22 - make it possible to override the kernel version in the target makefile git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7644 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../201-multiple_default_gateways.patch | 339 +++++++++++++++++++++ 1 file changed, 339 insertions(+) create mode 100644 target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch (limited to 'target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch') diff --git a/target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch b/target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch new file mode 100644 index 000000000..313b1102f --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch @@ -0,0 +1,339 @@ +diff -urN linux-2.6.21.1.old/include/linux/rtnetlink.h linux-2.6.21.1.dev/include/linux/rtnetlink.h +--- linux-2.6.21.1.old/include/linux/rtnetlink.h 2007-04-27 23:49:26.000000000 +0200 ++++ linux-2.6.21.1.dev/include/linux/rtnetlink.h 2007-05-26 20:46:11.883321560 +0200 +@@ -293,6 +293,8 @@ + #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */ + #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */ + #define RTNH_F_ONLINK 4 /* Gateway is forced on link */ ++#define RTNH_F_SUSPECT 8 /* We don't know the real state */ ++#define RTNH_F_BADSTATE (RTNH_F_DEAD | RTNH_F_SUSPECT) + + /* Macros to handle hexthops */ + +diff -urN linux-2.6.21.1.old/include/net/flow.h linux-2.6.21.1.dev/include/net/flow.h +--- linux-2.6.21.1.old/include/net/flow.h 2007-04-27 23:49:26.000000000 +0200 ++++ linux-2.6.21.1.dev/include/net/flow.h 2007-05-26 20:46:11.922315632 +0200 +@@ -19,6 +19,8 @@ + struct { + __be32 daddr; + __be32 saddr; ++ __u32 lsrc; ++ __u32 gw; + __u8 tos; + __u8 scope; + } ip4_u; +@@ -43,6 +45,8 @@ + #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_lsrc nl_u.ip4_u.lsrc ++#define fl4_gw nl_u.ip4_u.gw + #define fl4_tos nl_u.ip4_u.tos + #define fl4_scope nl_u.ip4_u.scope + +diff -urN linux-2.6.21.1.old/net/ipv4/route.c linux-2.6.21.1.dev/net/ipv4/route.c +--- linux-2.6.21.1.old/net/ipv4/route.c 2007-04-27 23:49:26.000000000 +0200 ++++ linux-2.6.21.1.dev/net/ipv4/route.c 2007-05-26 20:46:11.967308792 +0200 +@@ -1208,6 +1208,7 @@ + + /* Gateway is different ... */ + rt->rt_gateway = new_gw; ++ if (rt->fl.fl4_gw) rt->fl.fl4_gw = new_gw; + + /* Redirect received -> path was valid */ + dst_confirm(&rth->u.dst); +@@ -1643,6 +1644,7 @@ + rth->fl.fl4_tos = tos; + rth->fl.mark = skb->mark; + rth->fl.fl4_src = saddr; ++ rth->fl.fl4_lsrc = 0; + rth->rt_src = saddr; + #ifdef CONFIG_NET_CLS_ROUTE + rth->u.dst.tclassid = itag; +@@ -1653,6 +1655,7 @@ + dev_hold(rth->u.dst.dev); + rth->idev = in_dev_get(rth->u.dst.dev); + rth->fl.oif = 0; ++ rth->fl.fl4_gw = 0; + rth->rt_gateway = daddr; + rth->rt_spec_dst= spec_dst; + rth->rt_type = RTN_MULTICAST; +@@ -1716,7 +1719,7 @@ + static inline int __mkroute_input(struct sk_buff *skb, + struct fib_result* res, + struct in_device *in_dev, +- __be32 daddr, __be32 saddr, u32 tos, ++ __be32 daddr, __be32 saddr, u32 tos, u32 lsrc, + struct rtable **result) + { + +@@ -1751,6 +1754,7 @@ + flags |= RTCF_DIRECTSRC; + + if (out_dev == in_dev && err && !(flags & (RTCF_NAT | RTCF_MASQ)) && ++ !lsrc && + (IN_DEV_SHARED_MEDIA(out_dev) || + inet_addr_onlink(out_dev, saddr, FIB_RES_GW(*res)))) + flags |= RTCF_DOREDIRECT; +@@ -1788,6 +1792,7 @@ + rth->fl.mark = skb->mark; + rth->fl.fl4_src = saddr; + rth->rt_src = saddr; ++ rth->fl.fl4_lsrc = lsrc; + rth->rt_gateway = daddr; + rth->rt_iif = + rth->fl.iif = in_dev->dev->ifindex; +@@ -1795,6 +1800,7 @@ + dev_hold(rth->u.dst.dev); + rth->idev = in_dev_get(rth->u.dst.dev); + rth->fl.oif = 0; ++ rth->fl.fl4_gw = 0; + rth->rt_spec_dst= spec_dst; + + rth->u.dst.input = ip_forward; +@@ -1816,19 +1822,21 @@ + struct fib_result* res, + const struct flowi *fl, + struct in_device *in_dev, +- __be32 daddr, __be32 saddr, u32 tos) ++ __be32 daddr, __be32 saddr, u32 tos, ++ u32 lsrc) + { + struct rtable* rth = NULL; + int err; + unsigned hash; + ++ fib_select_default(fl, res); + #ifdef CONFIG_IP_ROUTE_MULTIPATH +- if (res->fi && res->fi->fib_nhs > 1 && fl->oif == 0) ++ if (res->fi && res->fi->fib_nhs > 1) + fib_select_multipath(fl, res); + #endif + + /* create a routing cache entry */ +- err = __mkroute_input(skb, res, in_dev, daddr, saddr, tos, &rth); ++ err = __mkroute_input(skb, res, in_dev, daddr, saddr, tos, lsrc, &rth); + if (err) + return err; + +@@ -1841,7 +1849,8 @@ + struct fib_result* res, + const struct flowi *fl, + struct in_device *in_dev, +- __be32 daddr, __be32 saddr, u32 tos) ++ __be32 daddr, __be32 saddr, u32 tos, ++ u32 lsrc) + { + #ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED + struct rtable* rth = NULL, *rtres; +@@ -1857,7 +1866,7 @@ + /* distinguish between multipath and singlepath */ + if (hopcount < 2) + return ip_mkroute_input_def(skb, res, fl, in_dev, daddr, +- saddr, tos); ++ saddr, tos, 0); + + /* add all alternatives to the routing cache */ + for (hop = 0; hop < hopcount; hop++) { +@@ -1869,7 +1878,7 @@ + + /* create a routing cache entry */ + err = __mkroute_input(skb, res, in_dev, daddr, saddr, tos, +- &rth); ++ 0, &rth); + if (err) + return err; + +@@ -1889,7 +1898,7 @@ + skb->dst = &rtres->u.dst; + return err; + #else /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */ +- return ip_mkroute_input_def(skb, res, fl, in_dev, daddr, saddr, tos); ++ return ip_mkroute_input_def(skb, res, fl, in_dev, daddr, saddr, tos, lsrc); + #endif /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */ + } + +@@ -1905,18 +1914,18 @@ + */ + + static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr, +- u8 tos, struct net_device *dev) ++ u8 tos, struct net_device *dev, u32 lsrc) + { + struct fib_result res; + struct in_device *in_dev = in_dev_get(dev); + struct flowi fl = { .nl_u = { .ip4_u = + { .daddr = daddr, +- .saddr = saddr, ++ .saddr = lsrc ? : saddr, + .tos = tos, + .scope = RT_SCOPE_UNIVERSE, + } }, + .mark = skb->mark, +- .iif = dev->ifindex }; ++ .iif = lsrc? loopback_dev.ifindex : dev->ifindex }; + unsigned flags = 0; + u32 itag = 0; + struct rtable * rth; +@@ -1949,6 +1958,12 @@ + if (BADCLASS(daddr) || ZERONET(daddr) || LOOPBACK(daddr)) + goto martian_destination; + ++ if (lsrc) { ++ if (MULTICAST(lsrc) || BADCLASS(lsrc) || ++ ZERONET(lsrc) || LOOPBACK(lsrc)) ++ goto e_inval; ++ } ++ + /* + * Now we are ready to route packet. + */ +@@ -1958,6 +1973,10 @@ + goto no_route; + } + free_res = 1; ++ if (lsrc && res.type != RTN_UNICAST && res.type != RTN_NAT) ++ goto e_inval; ++ fl.iif = dev->ifindex; ++ fl.fl4_src = saddr; + + RT_CACHE_STAT_INC(in_slow_tot); + +@@ -1982,7 +2001,7 @@ + if (res.type != RTN_UNICAST) + goto martian_destination; + +- err = ip_mkroute_input(skb, &res, &fl, in_dev, daddr, saddr, tos); ++ err = ip_mkroute_input(skb, &res, &fl, in_dev, daddr, saddr, tos, lsrc); + if (err == -ENOBUFS) + goto e_nobufs; + if (err == -EINVAL) +@@ -1997,6 +2016,8 @@ + brd_input: + if (skb->protocol != htons(ETH_P_IP)) + goto e_inval; ++ if (lsrc) ++ goto e_inval; + + if (ZERONET(saddr)) + spec_dst = inet_select_addr(dev, 0, RT_SCOPE_LINK); +@@ -2037,6 +2058,7 @@ + rth->u.dst.dev = &loopback_dev; + dev_hold(rth->u.dst.dev); + rth->idev = in_dev_get(rth->u.dst.dev); ++ rth->fl.fl4_gw = 0; + rth->rt_gateway = daddr; + rth->rt_spec_dst= spec_dst; + rth->u.dst.input= ip_local_deliver; +@@ -2086,8 +2108,9 @@ + goto e_inval; + } + +-int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr, +- u8 tos, struct net_device *dev) ++static inline int ++ip_route_input_cached(struct sk_buff *skb, __be32 daddr, __be32 saddr, ++ u8 tos, struct net_device *dev, u32 lsrc) + { + struct rtable * rth; + unsigned hash; +@@ -2102,6 +2125,7 @@ + if (rth->fl.fl4_dst == daddr && + rth->fl.fl4_src == saddr && + rth->fl.iif == iif && ++ rth->fl.fl4_lsrc == lsrc && + rth->fl.oif == 0 && + rth->fl.mark == skb->mark && + rth->fl.fl4_tos == tos) { +@@ -2148,7 +2172,19 @@ + rcu_read_unlock(); + return -EINVAL; + } +- return ip_route_input_slow(skb, daddr, saddr, tos, dev); ++ return ip_route_input_slow(skb, daddr, saddr, tos, dev, lsrc); ++} ++ ++int ip_route_input(struct sk_buff *skb, u32 daddr, u32 saddr, ++ u8 tos, struct net_device *dev) ++{ ++ return ip_route_input_cached(skb, daddr, saddr, tos, dev, 0); ++} ++ ++int ip_route_input_lookup(struct sk_buff *skb, u32 daddr, u32 saddr, ++ u8 tos, struct net_device *dev, u32 lsrc) ++{ ++ return ip_route_input_cached(skb, daddr, saddr, tos, dev, lsrc); + } + + static inline int __mkroute_output(struct rtable **result, +@@ -2227,6 +2263,7 @@ + rth->fl.fl4_tos = tos; + rth->fl.fl4_src = oldflp->fl4_src; + rth->fl.oif = oldflp->oif; ++ rth->fl.fl4_gw = oldflp->fl4_gw; + rth->fl.mark = oldflp->mark; + rth->rt_dst = fl->fl4_dst; + rth->rt_src = fl->fl4_src; +@@ -2367,6 +2404,7 @@ + struct flowi fl = { .nl_u = { .ip4_u = + { .daddr = oldflp->fl4_dst, + .saddr = oldflp->fl4_src, ++ .gw = oldflp->fl4_gw, + .tos = tos & IPTOS_RT_MASK, + .scope = ((tos & RTO_ONLINK) ? + RT_SCOPE_LINK : +@@ -2470,6 +2508,7 @@ + dev_out = &loopback_dev; + dev_hold(dev_out); + fl.oif = loopback_dev.ifindex; ++ fl.fl4_gw = 0; + res.type = RTN_LOCAL; + flags |= RTCF_LOCAL; + goto make_route; +@@ -2477,7 +2516,7 @@ + + if (fib_lookup(&fl, &res)) { + res.fi = NULL; +- if (oldflp->oif) { ++ if (oldflp->oif && dev_out->flags & IFF_UP) { + /* Apparently, routing tables are wrong. Assume, + that the destination is on link. + +@@ -2517,6 +2556,7 @@ + dev_out = &loopback_dev; + dev_hold(dev_out); + fl.oif = dev_out->ifindex; ++ fl.fl4_gw = 0; + if (res.fi) + fib_info_put(res.fi); + res.fi = NULL; +@@ -2524,13 +2564,12 @@ + goto make_route; + } + ++ if (res.type == RTN_UNICAST) ++ fib_select_default(&fl, &res); + #ifdef CONFIG_IP_ROUTE_MULTIPATH +- if (res.fi->fib_nhs > 1 && fl.oif == 0) ++ if (res.fi->fib_nhs > 1) + fib_select_multipath(&fl, &res); +- else + #endif +- if (!res.prefixlen && res.type == RTN_UNICAST && !fl.oif) +- fib_select_default(&fl, &res); + + if (!fl.fl4_src) + fl.fl4_src = FIB_RES_PREFSRC(res); +@@ -2567,6 +2606,7 @@ + rth->fl.fl4_src == flp->fl4_src && + rth->fl.iif == 0 && + rth->fl.oif == flp->oif && ++ rth->fl.fl4_gw == flp->fl4_gw && + rth->fl.mark == flp->mark && + !((rth->fl.fl4_tos ^ flp->fl4_tos) & + (IPTOS_RT_MASK | RTO_ONLINK))) { +@@ -3271,3 +3311,4 @@ + EXPORT_SYMBOL(__ip_select_ident); + EXPORT_SYMBOL(ip_route_input); + EXPORT_SYMBOL(ip_route_output_key); ++EXPORT_SYMBOL(ip_route_input_lookup); -- cgit v1.2.3