From 558b7fefacda2056bae7a8a573019a8862983e00 Mon Sep 17 00:00:00 2001 From: Greg Rose Date: Thu, 21 May 2020 14:54:03 -0700 Subject: [PATCH] compat: Backport ipv6_stub change A patch backported to the Linux stable 4.14 tree and present in the latest stable 4.14.181 kernel breaks ipv6_stub usage. The commit is 8ab8786f78c3 ("net ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup"). Create the compat layer define to check for it and fixup usage in vxlan and geneve modules. Passes Travis here: https://travis-ci.org/github/gvrose8192/ovs-experimental/builds/689798733 Signed-off-by: Greg Rose Signed-off-by: William Tu (cherry picked from commit 33f9c873b19a4993183e0c29a76a114646ca2977) Signed-off-by: Yousong Zhou --- acinclude.m4 | 2 ++ datapath/linux/compat/geneve.c | 11 ++++++++++- datapath/linux/compat/vxlan.c | 18 +++++++++++++++++- 3 files changed, 29 insertions(+), 2 deletions(-) --- a/acinclude.m4 +++ b/acinclude.m4 @@ -508,6 +508,8 @@ AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [ OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6_get_cookie], [OVS_DEFINE([HAVE_RT6_GET_COOKIE])]) + OVS_FIND_FIELD_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub], + [dst_entry]) OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net], [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])]) OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup_flow.*net], --- a/datapath/linux/compat/geneve.c +++ b/datapath/linux/compat/geneve.c @@ -962,7 +962,16 @@ static struct dst_entry *geneve_get_v6_d return dst; } -#if defined(HAVE_IPV6_DST_LOOKUP_FLOW_NET) +#if defined(HAVE_IPV6_STUB_WITH_DST_ENTRY) && defined(HAVE_IPV6_DST_LOOKUP_FLOW) +#ifdef HAVE_IPV6_DST_LOOKUP_FLOW_NET + dst = ipv6_stub->ipv6_dst_lookup_flow(geneve->net, gs6->sock->sk, fl6, + NULL); +#else + dst = ipv6_stub->ipv6_dst_lookup_flow(gs6->sock->sk, fl6, + NULL); +#endif + if (IS_ERR(dst)) { +#elif defined(HAVE_IPV6_DST_LOOKUP_FLOW_NET) if (ipv6_stub->ipv6_dst_lookup_flow(geneve->net, gs6->sock->sk, &dst, fl6)) { #elif defined(HAVE_IPV6_DST_LOOKUP_FLOW) --- a/datapath/linux/compat/vxlan.c +++ b/datapath/linux/compat/vxlan.c @@ -967,7 +967,10 @@ static struct dst_entry *vxlan6_get_rout bool use_cache = (dst_cache && ip_tunnel_dst_cache_usable(skb, info)); struct dst_entry *ndst; struct flowi6 fl6; +#if !defined(HAVE_IPV6_STUB_WITH_DST_ENTRY) || \ + !defined(HAVE_IPV6_DST_LOOKUP_FLOW) int err; +#endif if (!sock6) return ERR_PTR(-EIO); @@ -990,7 +993,15 @@ static struct dst_entry *vxlan6_get_rout fl6.fl6_dport = dport; fl6.fl6_sport = sport; -#if defined(HAVE_IPV6_DST_LOOKUP_FLOW_NET) +#if defined(HAVE_IPV6_STUB_WITH_DST_ENTRY) && defined(HAVE_IPV6_DST_LOOKUP_FLOW) +#ifdef HAVE_IPV6_DST_LOOKUP_FLOW_NET + ndst = ipv6_stub->ipv6_dst_lookup_flow(vxlan->net, sock6->sock->sk, + &fl6, NULL); +#else + ndst = ipv6_stub->ipv6_dst_lookup_flow(sock6->sock->sk, &fl6, NULL); +#endif + if (unlikely(IS_ERR(ndst))) { +#elif defined(HAVE_IPV6_DST_LOOKUP_FLOW_NET) err = ipv6_stub->ipv6_dst_lookup_flow(vxlan->net, sock6->sock->sk, &ndst, &fl6); #elif defined(HAVE_IPV6_DST_LOOKUP_FLOW) @@ -1004,8 +1015,13 @@ static struct dst_entry *vxlan6_get_rout #else err = ip6_dst_lookup(vxlan->vn6_sock->sock->sk, &ndst, &fl6); #endif +#if defined(HAVE_IPV6_STUB_WITH_DST_ENTRY) && defined(HAVE_IPV6_DST_LOOKUP_FLOW) + return ERR_PTR(-ENETUNREACH); + } +#else if (err < 0) return ERR_PTR(err); +#endif *saddr = fl6.saddr; if (use_cache)