xfrm: remove init_path indirection from afinfo_policy

handle this directly, its only used by ipv6.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

include/net/xfrm.h

@@ -329,9 +329,6 @@ struct xfrm_policy_afinfo {
 	void			(*decode_session)(struct sk_buff *skb,
 						  struct flowi *fl,
 						  int reverse);
-	int			(*init_path)(struct xfrm_dst *path,
-					     struct dst_entry *dst,
-					     int nfheader_len);
 	int			(*fill_dst)(struct xfrm_dst *xdst,
 					    struct net_device *dev,
 					    const struct flowi *fl);

net/ipv4/xfrm4_policy.c

@@ -69,12 +69,6 @@ static int xfrm4_get_saddr(struct net *net, int oif,
 	return 0;
 }
 
-static int xfrm4_init_path(struct xfrm_dst *path, struct dst_entry *dst,
-			   int nfheader_len)
-{
-	return 0;
-}
-
 static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
 			  const struct flowi *fl)
 {
@@ -267,7 +261,6 @@ static const struct xfrm_policy_afinfo xfrm4_policy_afinfo = {
 	.dst_lookup =		xfrm4_dst_lookup,
 	.get_saddr =		xfrm4_get_saddr,
 	.decode_session =	_decode_session4,
-	.init_path =		xfrm4_init_path,
 	.fill_dst =		xfrm4_fill_dst,
 	.blackhole_route =	ipv4_blackhole_route,
 };

net/ipv6/xfrm6_policy.c

@@ -71,19 +71,6 @@ static int xfrm6_get_saddr(struct net *net, int oif,
 	return 0;
 }
 
-static int xfrm6_init_path(struct xfrm_dst *path, struct dst_entry *dst,
-			   int nfheader_len)
-{
-	if (dst->ops->family == AF_INET6) {
-		struct rt6_info *rt = (struct rt6_info *)dst;
-		path->path_cookie = rt6_get_cookie(rt);
-	}
-
-	path->u.rt6.rt6i_nfheader_len = nfheader_len;
-
-	return 0;
-}
-
 static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
 			  const struct flowi *fl)
 {
@@ -287,7 +274,6 @@ static const struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
 	.dst_lookup =		xfrm6_dst_lookup,
 	.get_saddr =		xfrm6_get_saddr,
 	.decode_session =	_decode_session6,
-	.init_path =		xfrm6_init_path,
 	.fill_dst =		xfrm6_fill_dst,
 	.blackhole_route =	ip6_blackhole_route,
 };

net/xfrm/xfrm_policy.c

@@ -2491,21 +2491,14 @@ static inline struct xfrm_dst *xfrm_alloc_dst(struct net *net, int family)
 	return xdst;
 }
 
-static inline int xfrm_init_path(struct xfrm_dst *path, struct dst_entry *dst,
-				 int nfheader_len)
+static void xfrm_init_path(struct xfrm_dst *path, struct dst_entry *dst,
+			   int nfheader_len)
 {
-	const struct xfrm_policy_afinfo *afinfo =
-		xfrm_policy_get_afinfo(dst->ops->family);
-	int err;
-
-	if (!afinfo)
-		return -EINVAL;
-
-	err = afinfo->init_path(path, dst, nfheader_len);
-
-	rcu_read_unlock();
-
-	return err;
+	if (dst->ops->family == AF_INET6) {
+		struct rt6_info *rt = (struct rt6_info *)dst;
+		path->path_cookie = rt6_get_cookie(rt);
+		path->u.rt6.rt6i_nfheader_len = nfheader_len;
+	}
 }
 
 static inline int xfrm_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,