struct dst_entry
{
- struct dst_entry *next;
- atomic_t __refcnt; /* client references */
- int __use;
+ struct rcu_head rcu_head;
struct dst_entry *child;
struct net_device *dev;
short error;
#define DST_NOXFRM 2
#define DST_NOPOLICY 4
#define DST_NOHASH 8
-#define DST_BALANCED 0x10
- unsigned long lastuse;
unsigned long expires;
unsigned short header_len; /* more space at head required */
- unsigned short nfheader_len; /* more non-fragment space at head required */
unsigned short trailer_len; /* space to reserve at tail */
- u32 metrics[RTAX_MAX];
- struct dst_entry *path;
-
+ unsigned int rate_tokens;
unsigned long rate_last; /* rate limiting for ICMP */
- unsigned long rate_tokens;
+
+ struct dst_entry *path;
struct neighbour *neighbour;
struct hh_cache *hh;
int (*input)(struct sk_buff*);
int (*output)(struct sk_buff*);
+ struct dst_ops *ops;
+
+ u32 metrics[RTAX_MAX];
+
#ifdef CONFIG_NET_CLS_ROUTE
__u32 tclassid;
#endif
- struct dst_ops *ops;
- struct rcu_head rcu_head;
-
- char info[0];
+ /*
+ * __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;
+ struct rt6_info *rt6_next;
+ struct dn_route *dn_next;
+ };
};
__be16 protocol;
unsigned gc_thresh;
- int (*gc)(void);
+ int (*gc)(struct dst_ops *ops);
struct dst_entry * (*check)(struct dst_entry *, __u32 cookie);
void (*destroy)(struct dst_entry *);
void (*ifdown)(struct dst_entry *,
struct dst_entry * (*negative_advice)(struct dst_entry *);
void (*link_failure)(struct sk_buff *);
void (*update_pmtu)(struct dst_entry *dst, u32 mtu);
+ int (*local_out)(struct sk_buff *skb);
int entry_size;
atomic_t entries;
struct kmem_cache *kmem_cachep;
+ struct net *dst_net;
};
#ifdef __KERNEL__
atomic_inc(&dst->__refcnt);
}
+static inline void dst_use(struct dst_entry *dst, unsigned long time)
+{
+ dst_hold(dst);
+ dst->__use++;
+ dst->lastuse = time;
+}
+
static inline
struct dst_entry * dst_clone(struct dst_entry * dst)
{
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.
return child;
}
+extern int dst_discard(struct sk_buff *skb);
extern void * dst_alloc(struct dst_ops * ops);
extern void __dst_free(struct dst_entry * dst);
extern struct dst_entry *dst_destroy(struct dst_entry * dst);
extern void dst_init(void);
+/* Flags for xfrm_lookup flags argument. */
+enum {
+ XFRM_LOOKUP_WAIT = 1 << 0,
+ XFRM_LOOKUP_ICMP = 1 << 1,
+};
+
struct flowi;
#ifndef CONFIG_XFRM
static inline int xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
{
return 0;
}
+static inline int __xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
+ struct sock *sk, int flags)
+{
+ return 0;
+}
#else
extern int xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
struct sock *sk, int flags);
+extern int __xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
+ struct sock *sk, int flags);
#endif
#endif