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86393e52 AD |
1 | #ifndef _NET_DST_OPS_H |
2 | #define _NET_DST_OPS_H | |
3 | #include <linux/types.h> | |
fc66f95c | 4 | #include <linux/percpu_counter.h> |
43b81f85 | 5 | #include <linux/cache.h> |
86393e52 AD |
6 | |
7 | struct dst_entry; | |
8 | struct kmem_cachep; | |
9 | struct net_device; | |
10 | struct sk_buff; | |
d8f1641b | 11 | struct sock; |
cf91a99d | 12 | struct net; |
86393e52 AD |
13 | |
14 | struct dst_ops { | |
15 | unsigned short family; | |
95c96174 | 16 | unsigned int gc_thresh; |
86393e52 AD |
17 | |
18 | int (*gc)(struct dst_ops *ops); | |
19 | struct dst_entry * (*check)(struct dst_entry *, __u32 cookie); | |
0dbaee3b | 20 | unsigned int (*default_advmss)(const struct dst_entry *); |
ebb762f2 | 21 | unsigned int (*mtu)(const struct dst_entry *); |
62fa8a84 | 22 | u32 * (*cow_metrics)(struct dst_entry *, unsigned long); |
86393e52 AD |
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 *); | |
6700c270 DM |
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); | |
cf91a99d | 32 | int (*local_out)(struct net *net, struct sock *sk, struct sk_buff *skb); |
f894cbf8 DM |
33 | struct neighbour * (*neigh_lookup)(const struct dst_entry *dst, |
34 | struct sk_buff *skb, | |
35 | const void *daddr); | |
111757e7 JA |
36 | void (*confirm_neigh)(const struct dst_entry *dst, |
37 | const void *daddr); | |
86393e52 | 38 | |
86393e52 | 39 | struct kmem_cache *kmem_cachep; |
fc66f95c ED |
40 | |
41 | struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp; | |
86393e52 | 42 | }; |
fc66f95c ED |
43 | |
44 | static inline int dst_entries_get_fast(struct dst_ops *dst) | |
45 | { | |
46 | return percpu_counter_read_positive(&dst->pcpuc_entries); | |
47 | } | |
48 | ||
49 | static inline int dst_entries_get_slow(struct dst_ops *dst) | |
50 | { | |
51 | int res; | |
52 | ||
53 | local_bh_disable(); | |
54 | res = percpu_counter_sum_positive(&dst->pcpuc_entries); | |
55 | local_bh_enable(); | |
56 | return res; | |
57 | } | |
58 | ||
59 | static inline void dst_entries_add(struct dst_ops *dst, int val) | |
60 | { | |
61 | local_bh_disable(); | |
62 | percpu_counter_add(&dst->pcpuc_entries, val); | |
63 | local_bh_enable(); | |
64 | } | |
65 | ||
66 | static inline int dst_entries_init(struct dst_ops *dst) | |
67 | { | |
908c7f19 | 68 | return percpu_counter_init(&dst->pcpuc_entries, 0, GFP_KERNEL); |
fc66f95c ED |
69 | } |
70 | ||
71 | static inline void dst_entries_destroy(struct dst_ops *dst) | |
72 | { | |
73 | percpu_counter_destroy(&dst->pcpuc_entries); | |
74 | } | |
75 | ||
86393e52 | 76 | #endif |