Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _NET_DST_OPS_H
2#define _NET_DST_OPS_H
3#include <linux/types.h>
4#include <linux/percpu_counter.h>
5#include <linux/cache.h>
6
7struct dst_entry;
8struct kmem_cachep;
9struct net_device;
10struct sk_buff;
11struct sock;
12struct net;
13
14struct dst_ops {
15 unsigned short family;
16 unsigned int gc_thresh;
17
18 int (*gc)(struct dst_ops *ops);
19 struct dst_entry * (*check)(struct dst_entry *, __u32 cookie);
20 unsigned int (*default_advmss)(const struct dst_entry *);
21 unsigned int (*mtu)(const struct dst_entry *);
22 u32 * (*cow_metrics)(struct dst_entry *, unsigned long);
23 void (*destroy)(struct dst_entry *);
24 void (*ifdown)(struct dst_entry *,
25 struct net_device *dev, int how);
26 struct dst_entry * (*negative_advice)(struct dst_entry *);
27 void (*link_failure)(struct sk_buff *);
28 void (*update_pmtu)(struct dst_entry *dst, struct sock *sk,
29 struct sk_buff *skb, u32 mtu);
30 void (*redirect)(struct dst_entry *dst, struct sock *sk,
31 struct sk_buff *skb);
32 int (*local_out)(struct net *net, struct sock *sk, struct sk_buff *skb);
33 struct neighbour * (*neigh_lookup)(const struct dst_entry *dst,
34 struct sk_buff *skb,
35 const void *daddr);
36 void (*confirm_neigh)(const struct dst_entry *dst,
37 const void *daddr);
38
39 struct kmem_cache *kmem_cachep;
40
41 struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp;
42};
43
44static inline int dst_entries_get_fast(struct dst_ops *dst)
45{
46 return percpu_counter_read_positive(&dst->pcpuc_entries);
47}
48
49static inline int dst_entries_get_slow(struct dst_ops *dst)
50{
51 return percpu_counter_sum_positive(&dst->pcpuc_entries);
52}
53
54static inline void dst_entries_add(struct dst_ops *dst, int val)
55{
56 percpu_counter_add(&dst->pcpuc_entries, val);
57}
58
59static inline int dst_entries_init(struct dst_ops *dst)
60{
61 return percpu_counter_init(&dst->pcpuc_entries, 0, GFP_KERNEL);
62}
63
64static inline void dst_entries_destroy(struct dst_ops *dst)
65{
66 percpu_counter_destroy(&dst->pcpuc_entries);
67}
68
69#endif