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Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r--net/ipv4/route.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index e4ba974f143c..21ad369014c0 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1587,11 +1587,14 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
if (ipv4_is_zeronet(daddr))
goto martian_destination;
- if (likely(!IN_DEV_ROUTE_LOCALNET(in_dev))) {
- if (ipv4_is_loopback(daddr))
+ /* Following code try to avoid calling IN_DEV_NET_ROUTE_LOCALNET(),
+ * and call it once if daddr or/and saddr are loopback addresses
+ */
+ if (ipv4_is_loopback(daddr)) {
+ if (!IN_DEV_NET_ROUTE_LOCALNET(in_dev, net))
goto martian_destination;
-
- if (ipv4_is_loopback(saddr))
+ } else if (ipv4_is_loopback(saddr)) {
+ if (!IN_DEV_NET_ROUTE_LOCALNET(in_dev, net))
goto martian_source;
}