3 #include <linux/types.h>
4 #include <linux/percpu_counter.h>
5 #include <linux/cache.h>
14 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, struct sock *sk,
28 struct sk_buff *skb, u32 mtu);
29 void (*redirect)(struct dst_entry *dst, struct sock *sk,
31 int (*local_out)(struct sk_buff *skb);
32 struct neighbour * (*neigh_lookup)(const struct dst_entry *dst,
36 struct kmem_cache *kmem_cachep;
38 struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp;
41 static inline int dst_entries_get_fast(struct dst_ops *dst)
43 return percpu_counter_read_positive(&dst->pcpuc_entries);
46 static inline int dst_entries_get_slow(struct dst_ops *dst)
51 res = percpu_counter_sum_positive(&dst->pcpuc_entries);
56 static inline void dst_entries_add(struct dst_ops *dst, int val)
59 percpu_counter_add(&dst->pcpuc_entries, val);
63 static inline int dst_entries_init(struct dst_ops *dst)
65 return percpu_counter_init(&dst->pcpuc_entries, 0, GFP_KERNEL);
68 static inline void dst_entries_destroy(struct dst_ops *dst)
70 percpu_counter_destroy(&dst->pcpuc_entries);