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[v2,net-next,15/18] ipv4: Handle ipv6 gateway in fib_good_nh

Message ID 20190405233041.30775-16-dsahern@kernel.org
State Accepted
Delegated to: David Miller
Headers show
Series ipv4: Enable support for IPv6 gateway with IPv4 routes | expand

Commit Message

David Ahern April 5, 2019, 11:30 p.m. UTC 
From: David Ahern <dsahern@gmail.com>

Update fib_good_nh to handle an ipv6 gateway.

Signed-off-by: David Ahern <dsahern@gmail.com>
---
 net/ipv4/fib_semantics.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
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Patch

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index e5a6d431bfab..c1ea138335a2 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1909,8 +1909,14 @@  static bool fib_good_nh(const struct fib_nh *nh)
 
 		rcu_read_lock_bh();
 
-		n = __ipv4_neigh_lookup_noref(nh->fib_nh_dev,
-					      (__force u32)nh->fib_nh_gw4);
+		if (likely(nh->fib_nh_gw_family == AF_INET))
+			n = __ipv4_neigh_lookup_noref(nh->fib_nh_dev,
+						   (__force u32)nh->fib_nh_gw4);
+		else if (nh->fib_nh_gw_family == AF_INET6)
+			n = __ipv6_neigh_lookup_noref_stub(nh->fib_nh_dev,
+							   &nh->fib_nh_gw6);
+		else
+			n = NULL;
 		if (n)
 			state = n->nud_state;