3 #include <linux/types.h>
4 #include <linux/percpu_counter.h>
5 #include <linux/cache.h>
13 unsigned short family;
15 unsigned int gc_thresh;
17 int (*gc)(struct dst_ops *ops);
18 struct dst_entry * (*check)(struct dst_entry *, __u32 cookie);
19 unsigned int (*default_advmss)(const struct dst_entry *);
20 unsigned int (*mtu)(const struct dst_entry *);
21 u32 * (*cow_metrics)(struct dst_entry *, unsigned long);
22 void (*destroy)(struct dst_entry *);
23 void (*ifdown)(struct dst_entry *,
24 struct net_device *dev, int how);
25 struct dst_entry * (*negative_advice)(struct dst_entry *);
26 void (*link_failure)(struct sk_buff *);
27 void (*update_pmtu)(struct dst_entry *dst, u32 mtu);
28 void (*redirect)(struct dst_entry *dst, struct sk_buff *skb);
29 int (*local_out)(struct sk_buff *skb);
30 struct neighbour * (*neigh_lookup)(const struct dst_entry *dst,
34 struct kmem_cache *kmem_cachep;
36 struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp;
39 static inline int dst_entries_get_fast(struct dst_ops *dst)
41 return percpu_counter_read_positive(&dst->pcpuc_entries);
44 static inline int dst_entries_get_slow(struct dst_ops *dst)
49 res = percpu_counter_sum_positive(&dst->pcpuc_entries);
54 static inline void dst_entries_add(struct dst_ops *dst, int val)
57 percpu_counter_add(&dst->pcpuc_entries, val);
61 static inline int dst_entries_init(struct dst_ops *dst)
63 return percpu_counter_init(&dst->pcpuc_entries, 0);
66 static inline void dst_entries_destroy(struct dst_ops *dst)
68 percpu_counter_destroy(&dst->pcpuc_entries);