[PATCH net-next 14/18] ipv4: Handle ipv6 gateway in fib_detect_death

[David Ahern]

From: David Ahern <dsah...@gmail.com>

Update fib_detect_death to handle an ipv6 gateway.

Signed-off-by: David Ahern <dsah...@gmail.com>
---
 net/ipv4/fib_semantics.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index acbdf0ed6ff8..f3f11f55e905 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -457,10 +457,18 @@ static int fib_detect_death(struct fib_info *fi, int 
order,
                            struct fib_info **last_resort, int *last_idx,
                            int dflt)
 {
+       const struct fib_nh_common *nhc = fib_info_nhc(fi, 0);
        struct neighbour *n;
        int state = NUD_NONE;
 
-       n = neigh_lookup(&arp_tbl, &fi->fib_nh[0].fib_nh_gw4, fi->fib_dev);
+       if (likely(nhc->nhc_gw_family == AF_INET))
+               n = neigh_lookup(&arp_tbl, &nhc->nhc_gw.ipv4, nhc->nhc_dev);
+       else if (nhc->nhc_gw_family == AF_INET6)
+               n = neigh_lookup(ipv6_stub->nd_tbl, &nhc->nhc_gw.ipv6,
+                                nhc->nhc_dev);
+       else
+               n = NULL;
+
        if (n) {
                state = n->nud_state;
                neigh_release(n);
-- 
2.11.0