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-rw-r--r--include/net/dst_ops.h37
1 files changed, 36 insertions, 1 deletions
diff --git a/include/net/dst_ops.h b/include/net/dst_ops.h
index d1ff9b7e99b8..1fa5306e3e23 100644
--- a/include/net/dst_ops.h
+++ b/include/net/dst_ops.h
@@ -1,6 +1,7 @@
1#ifndef _NET_DST_OPS_H 1#ifndef _NET_DST_OPS_H
2#define _NET_DST_OPS_H 2#define _NET_DST_OPS_H
3#include <linux/types.h> 3#include <linux/types.h>
4#include <linux/percpu_counter.h>
4 5
5struct dst_entry; 6struct dst_entry;
6struct kmem_cachep; 7struct kmem_cachep;
@@ -22,7 +23,41 @@ struct dst_ops {
22 void (*update_pmtu)(struct dst_entry *dst, u32 mtu); 23 void (*update_pmtu)(struct dst_entry *dst, u32 mtu);
23 int (*local_out)(struct sk_buff *skb); 24 int (*local_out)(struct sk_buff *skb);
24 25
25 atomic_t entries;
26 struct kmem_cache *kmem_cachep; 26 struct kmem_cache *kmem_cachep;
27
28 struct percpu_counter pcpuc_entries ____cacheline_aligned_in_smp;
27}; 29};
30
31static inline int dst_entries_get_fast(struct dst_ops *dst)
32{
33 return percpu_counter_read_positive(&dst->pcpuc_entries);
34}
35
36static 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
46static 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
53static inline int dst_entries_init(struct dst_ops *dst)
54{
55 return percpu_counter_init(&dst->pcpuc_entries, 0);
56}
57
58static inline void dst_entries_destroy(struct dst_ops *dst)
59{
60 percpu_counter_destroy(&dst->pcpuc_entries);
61}
62
28#endif 63#endif