1 files changed, 18 insertions, 35 deletions

diff --git a/include/net/dst.h b/include/net/dst.h
index 049af33da3b6..f73611ec4017 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -31,9 +31,9 @@
 struct sk_buff;
 
 struct dst_entry {
+	struct net_device       *dev;
 	struct rcu_head		rcu_head;
 	struct dst_entry	*child;
-	struct net_device       *dev;
 	struct  dst_ops	        *ops;
 	unsigned long		_metrics;
 	unsigned long           expires;
@@ -51,13 +51,11 @@ struct dst_entry {
 #define DST_HOST		0x0001
 #define DST_NOXFRM		0x0002
 #define DST_NOPOLICY		0x0004
-#define DST_NOHASH		0x0008
-#define DST_NOCACHE		0x0010
-#define DST_NOCOUNT		0x0020
-#define DST_FAKE_RTABLE		0x0040
-#define DST_XFRM_TUNNEL		0x0080
-#define DST_XFRM_QUEUE		0x0100
-#define DST_METADATA		0x0200
+#define DST_NOCOUNT		0x0008
+#define DST_FAKE_RTABLE		0x0010
+#define DST_XFRM_TUNNEL		0x0020
+#define DST_XFRM_QUEUE		0x0040
+#define DST_METADATA		0x0080
 
 	short			error;
 
@@ -107,10 +105,16 @@ struct dst_entry {
 	};
 };
 
+struct dst_metrics {
+	u32		metrics[RTAX_MAX];
+	atomic_t	refcnt;
+};
+extern const struct dst_metrics dst_default_metrics;
+
 u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old);
-extern const u32 dst_default_metrics[];
 
 #define DST_METRICS_READ_ONLY		0x1UL
+#define DST_METRICS_REFCOUNTED		0x2UL
 #define DST_METRICS_FLAGS		0x3UL
 #define __DST_METRICS_PTR(Y)	\
 	((u32 *)((Y) & ~DST_METRICS_FLAGS))
@@ -247,7 +251,7 @@ static inline void dst_hold(struct dst_entry *dst)
 	 * __pad_to_align_refcnt declaration in struct dst_entry
 	 */
 	BUILD_BUG_ON(offsetof(struct dst_entry, __refcnt) & 63);
-	atomic_inc(&dst->__refcnt);
+	WARN_ON(atomic_inc_not_zero(&dst->__refcnt) == 0);
 }
 
 static inline void dst_use(struct dst_entry *dst, unsigned long time)
@@ -272,6 +276,8 @@ static inline struct dst_entry *dst_clone(struct dst_entry *dst)
 
 void dst_release(struct dst_entry *dst);
 
+void dst_release_immediate(struct dst_entry *dst);
+
 static inline void refdst_drop(unsigned long refdst)
 {
 	if (!(refdst & SKB_DST_NOREF))
@@ -328,10 +334,7 @@ static inline void skb_dst_force(struct sk_buff *skb)
  */
 static inline bool dst_hold_safe(struct dst_entry *dst)
 {
-	if (dst->flags & DST_NOCACHE)
-		return atomic_inc_not_zero(&dst->__refcnt);
-	dst_hold(dst);
-	return true;
+	return atomic_inc_not_zero(&dst->__refcnt);
 }
 
 /**
@@ -417,26 +420,8 @@ void *dst_alloc(struct dst_ops *ops, struct net_device *dev, int initial_ref,
 void dst_init(struct dst_entry *dst, struct dst_ops *ops,
 	      struct net_device *dev, int initial_ref, int initial_obsolete,
 	      unsigned short flags);
-void __dst_free(struct dst_entry *dst);
 struct dst_entry *dst_destroy(struct dst_entry *dst);
-
-static inline void dst_free(struct dst_entry *dst)
-{
-	if (dst->obsolete > 0)
-		return;
-	if (!atomic_read(&dst->__refcnt)) {
-		dst = dst_destroy(dst);
-		if (!dst)
-			return;
-	}
-	__dst_free(dst);
-}
-
-static inline void dst_rcu_free(struct rcu_head *head)
-{
-	struct dst_entry *dst = container_of(head, struct dst_entry, rcu_head);
-	dst_free(dst);
-}
+void dst_dev_put(struct dst_entry *dst);
 
 static inline void dst_confirm(struct dst_entry *dst)
 {
@@ -499,8 +484,6 @@ static inline struct dst_entry *dst_check(struct dst_entry *dst, u32 cookie)
 	return dst;
 }
 
-void dst_subsys_init(void);
-
 /* Flags for xfrm_lookup flags argument. */
 enum {
 	XFRM_LOOKUP_ICMP = 1 << 0,