netfilter: rpfilter: Convert rpfilter_lookup_reverse to new dev helper

Convert rpfilter_lookup_reverse to the new device checking helper
and remove the duplicate code.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/netfilter/ipt_rpfilter.c b/net/ipv4/netfilter/ipt_rpfilter.c
index 12843c9..0b10d88 100644 (file)
--- a/net/ipv4/netfilter/ipt_rpfilter.c
+++ b/net/ipv4/netfilter/ipt_rpfilter.c
@@ -36,7 +36,6 @@ static bool rpfilter_lookup_reverse(struct net *net, struct flowi4 *fl4,
                                const struct net_device *dev, u8 flags)
 {
        struct fib_result res;
-       bool dev_match;
        int ret __maybe_unused;
 
        if (fib_lookup(net, fl4, &res, FIB_LOOKUP_IGNORE_LINKSTATE))
@@ -46,21 +45,7 @@ static bool rpfilter_lookup_reverse(struct net *net, struct flowi4 *fl4,
                if (res.type != RTN_LOCAL || !(flags & XT_RPFILTER_ACCEPT_LOCAL))
                        return false;
        }
-       dev_match = false;
-#ifdef CONFIG_IP_ROUTE_MULTIPATH
-       for (ret = 0; ret < res.fi->fib_nhs; ret++) {
-               struct fib_nh *nh = &res.fi->fib_nh[ret];
-
-               if (nh->nh_dev == dev) {
-                       dev_match = true;
-                       break;
-               }
-       }
-#else
-       if (FIB_RES_DEV(res) == dev)
-               dev_match = true;
-#endif
-       return dev_match || flags & XT_RPFILTER_LOOSE;
+       return fib_info_nh_uses_dev(res.fi, dev) || flags & XT_RPFILTER_LOOSE;
 }
 
 static bool