bpf, dst: add and use dst_tclassid helper

[cascardo/linux.git] / net / core / filter.c

diff --git a/net/core/filter.c b/net/core/filter.c
index 69c7b2f..4c35d83 100644 (file)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1682,14 +1682,7 @@ static const struct bpf_func_proto bpf_get_cgroup_classid_proto = {
 
 static u64 bpf_get_route_realm(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
 {
-#ifdef CONFIG_IP_ROUTE_CLASSID
-       const struct dst_entry *dst;
-
-       dst = skb_dst((struct sk_buff *) (unsigned long) r1);
-       if (dst)
-               return dst->tclassid;
-#endif
-       return 0;
+       return dst_tclassid((struct sk_buff *) (unsigned long) r1);
 }
 
 static const struct bpf_func_proto bpf_get_route_realm_proto = {