]>
Commit | Line | Data |
---|---|---|
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> |
86393e52 AD |
5 | |
6 | struct dst_entry; | |
7 | struct kmem_cachep; | |
8 | struct net_device; | |
9 | struct sk_buff; | |
10 | ||
11 | struct dst_ops { | |
12 | unsigned short family; | |
13 | __be16 protocol; | |
14 | unsigned gc_thresh; | |
15 | ||
16 | int (*gc)(struct dst_ops *ops); | |
17 | struct dst_entry * (*check)(struct dst_entry *, __u32 cookie); | |
18 | void (*destroy)(struct dst_entry *); | |
19 | void (*ifdown)(struct dst_entry *, | |
20 | struct net_device *dev, int how); | |
21 | struct dst_entry * (*negative_advice)(struct dst_entry *); | |
22 | void (*link_failure)(struct sk_buff *); | |
23 | void (*update_pmtu)(struct dst_entry *dst, u32 mtu); | |
24 | int (*local_out)(struct sk_buff *skb); | |
25 | ||
86393e52 | 26 | struct kmem_cache *kmem_cachep; |
fc66f95c ED |
27 | |
28 | struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp; | |
86393e52 | 29 | }; |
fc66f95c ED |
30 | |
31 | static inline int dst_entries_get_fast(struct dst_ops *dst) | |
32 | { | |
33 | return percpu_counter_read_positive(&dst->pcpuc_entries); | |
34 | } | |
35 | ||
36 | static inline int dst_entries_get_slow(struct dst_ops *dst) | |
37 | { | |
38 | int res; | |
39 | ||
40 | local_bh_disable(); | |
41 | res = percpu_counter_sum_positive(&dst->pcpuc_entries); | |
42 | local_bh_enable(); | |
43 | return res; | |
44 | } | |
45 | ||
46 | static inline void dst_entries_add(struct dst_ops *dst, int val) | |
47 | { | |
48 | local_bh_disable(); | |
49 | percpu_counter_add(&dst->pcpuc_entries, val); | |
50 | local_bh_enable(); | |
51 | } | |
52 | ||
53 | static inline int dst_entries_init(struct dst_ops *dst) | |
54 | { | |
55 | return percpu_counter_init(&dst->pcpuc_entries, 0); | |
56 | } | |
57 | ||
58 | static inline void dst_entries_destroy(struct dst_ops *dst) | |
59 | { | |
60 | percpu_counter_destroy(&dst->pcpuc_entries); | |
61 | } | |
62 | ||
86393e52 | 63 | #endif |