unsigned short header_len; /* more space at head required */
unsigned short trailer_len; /* space to reserve at tail */
- u32 metrics[RTAX_MAX];
- struct dst_entry *path;
-
- unsigned long rate_last; /* rate limiting for ICMP */
unsigned int rate_tokens;
+ unsigned long rate_last; /* rate limiting for ICMP */
-#ifdef CONFIG_NET_CLS_ROUTE
- __u32 tclassid;
-#endif
+ struct dst_entry *path;
struct neighbour *neighbour;
struct hh_cache *hh;
int (*output)(struct sk_buff*);
struct dst_ops *ops;
-
- unsigned long lastuse;
+
+ u32 metrics[RTAX_MAX];
+
+#ifdef CONFIG_NET_CLS_ROUTE
+ __u32 tclassid;
+#endif
+
+ /*
+ * __refcnt wants to be on a different cache line from
+ * input/output/ops or performance tanks badly
+ */
atomic_t __refcnt; /* client references */
int __use;
+ unsigned long lastuse;
union {
struct dst_entry *next;
struct rtable *rt_next;
return dst;
}
-static inline
-void dst_release(struct dst_entry * dst)
-{
- if (dst) {
- WARN_ON(atomic_read(&dst->__refcnt) < 1);
- smp_mb__before_atomic_dec();
- atomic_dec(&dst->__refcnt);
- }
-}
+extern void dst_release(struct dst_entry *dst);
/* Children define the path of the packet through the
* Linux networking. Thus, destinations are stackable.