Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...
[platform/adaptation/renesas_rcar/renesas_kernel.git] / include / net / dst_ops.h
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
7 struct dst_entry;
8 struct kmem_cachep;
9 struct net_device;
10 struct sk_buff;
11 struct sock;
12
13 struct dst_ops {
14         unsigned short          family;
15         __be16                  protocol;
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 sk_buff *skb);
33         struct neighbour *      (*neigh_lookup)(const struct dst_entry *dst,
34                                                 struct sk_buff *skb,
35                                                 const void *daddr);
36
37         struct kmem_cache       *kmem_cachep;
38
39         struct percpu_counter   pcpuc_entries ____cacheline_aligned_in_smp;
40 };
41
42 static inline int dst_entries_get_fast(struct dst_ops *dst)
43 {
44         return percpu_counter_read_positive(&dst->pcpuc_entries);
45 }
46
47 static inline int dst_entries_get_slow(struct dst_ops *dst)
48 {
49         int res;
50
51         local_bh_disable();
52         res = percpu_counter_sum_positive(&dst->pcpuc_entries);
53         local_bh_enable();
54         return res;
55 }
56
57 static inline void dst_entries_add(struct dst_ops *dst, int val)
58 {
59         local_bh_disable();
60         percpu_counter_add(&dst->pcpuc_entries, val);
61         local_bh_enable();
62 }
63
64 static inline int dst_entries_init(struct dst_ops *dst)
65 {
66         return percpu_counter_init(&dst->pcpuc_entries, 0);
67 }
68
69 static inline void dst_entries_destroy(struct dst_ops *dst)
70 {
71         percpu_counter_destroy(&dst->pcpuc_entries);
72 }
73
74 #endif