From 7bdf4de1267780aa194b3a28c85a6c4d617b0bdb Mon Sep 17 00:00:00 2001 From: Donald Sharp Date: Wed, 4 Sep 2019 10:11:58 -0400 Subject: net: Properly update v4 routes with v6 nexthop MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When creating a v4 route that uses a v6 nexthop from a nexthop group. Allow the kernel to properly send the nexthop as v6 via the RTA_VIA attribute. Broken behavior: $ ip nexthop add via fe80::9 dev eth0 $ ip nexthop show id 1 via fe80::9 dev eth0 scope link $ ip route add 4.5.6.7/32 nhid 1 $ ip route show default via 10.0.2.2 dev eth0 4.5.6.7 nhid 1 via 254.128.0.0 dev eth0 10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15 $ Fixed behavior: $ ip nexthop add via fe80::9 dev eth0 $ ip nexthop show id 1 via fe80::9 dev eth0 scope link $ ip route add 4.5.6.7/32 nhid 1 $ ip route show default via 10.0.2.2 dev eth0 4.5.6.7 nhid 1 via inet6 fe80::9 dev eth0 10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15 $ v2, v3: Addresses code review comments from David Ahern Fixes: dcb1ecb50edf (“ipv4: Prepare for fib6_nh from a nexthop object”) Signed-off-by: Donald Sharp Reviewed-by: David Ahern Signed-off-by: David S. Miller --- net/ipv6/route.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 977cfd09e2a3..85bcd97f7a72 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -5333,7 +5333,7 @@ static int rt6_fill_node_nexthop(struct sk_buff *skb, struct nexthop *nh, if (!mp) goto nla_put_failure; - if (nexthop_mpath_fill_node(skb, nh)) + if (nexthop_mpath_fill_node(skb, nh, AF_INET6)) goto nla_put_failure; nla_nest_end(skb, mp); @@ -5341,7 +5341,7 @@ static int rt6_fill_node_nexthop(struct sk_buff *skb, struct nexthop *nh, struct fib6_nh *fib6_nh; fib6_nh = nexthop_fib6_nh(nh); - if (fib_nexthop_info(skb, &fib6_nh->nh_common, + if (fib_nexthop_info(skb, &fib6_nh->nh_common, AF_INET6, flags, false) < 0) goto nla_put_failure; } @@ -5470,13 +5470,14 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, goto nla_put_failure; if (fib_add_nexthop(skb, &rt->fib6_nh->nh_common, - rt->fib6_nh->fib_nh_weight) < 0) + rt->fib6_nh->fib_nh_weight, AF_INET6) < 0) goto nla_put_failure; list_for_each_entry_safe(sibling, next_sibling, &rt->fib6_siblings, fib6_siblings) { if (fib_add_nexthop(skb, &sibling->fib6_nh->nh_common, - sibling->fib6_nh->fib_nh_weight) < 0) + sibling->fib6_nh->fib_nh_weight, + AF_INET6) < 0) goto nla_put_failure; } @@ -5493,7 +5494,7 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, rtm->rtm_flags |= nh_flags; } else { - if (fib_nexthop_info(skb, &rt->fib6_nh->nh_common, + if (fib_nexthop_info(skb, &rt->fib6_nh->nh_common, AF_INET6, &nh_flags, false) < 0) goto nla_put_failure; -- cgit v1.2.3