1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
#ifndef __NET_DST_WRAPPER_H
#define __NET_DST_WRAPPER_H 1
#include <linux/version.h>
#include_next <net/dst.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0) && \
LINUX_VERSION_CODE > KERNEL_VERSION(3,0,20)
#define dst_get_neighbour_noref dst_get_neighbour
#endif
#ifndef HAVE_SKB_DST_ACCESSOR_FUNCS
static inline void skb_dst_drop(struct sk_buff *skb)
{
if (skb->dst)
dst_release(skb_dst(skb));
skb->dst = NULL;
}
#endif
#ifndef DST_OBSOLETE_NONE
#define DST_OBSOLETE_NONE 0
#endif
#ifndef DST_NOCOUNT
#define DST_NOCOUNT 0
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
static inline void __skb_dst_copy(struct sk_buff *nskb, unsigned long refdst)
{
nskb->_skb_dst = refdst;
dst_clone(skb_dst(nskb));
}
static inline void refdst_drop(unsigned long refdst) { }
static inline void skb_dst_set_noref(struct sk_buff *skb,
struct dst_entry *dst) { }
static inline void dst_init_metrics(struct dst_entry *dst, const u32 *metrics,
bool read_only) { }
#elif !defined(HAVE___SKB_DST_COPY)
static inline void __skb_dst_copy(struct sk_buff *nskb, unsigned long refdst)
{
nskb->_skb_refdst = refdst;
if (!(nskb->_skb_refdst & SKB_DST_NOREF))
dst_clone(skb_dst(nskb));
}
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
static inline void dst_entries_add(struct dst_ops *ops, int count)
{
atomic_add(count, &ops->entries);
}
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,3,0)
static const u32 rpl_dst_default_metrics[RTAX_MAX + 1] = {
/* This initializer is needed to force linker to place this variable
* into const section. Otherwise it might end into bss section.
* We really want to avoid false sharing on this variable, and catch
* any writes on it.
*/
[RTAX_MAX] = 0xdeadbeef,
};
#define dst_default_metrics rpl_dst_default_metrics
static inline void rpl_dst_init(struct dst_entry *dst, struct dst_ops *ops,
struct net_device *dev, int initial_ref,
int initial_obsolete, unsigned short flags)
{
/* XXX: It's easier to handle compatibility by zeroing, as we can
* refer to fewer fields. Do that here.
*/
memset(dst, 0, sizeof *dst);
dst->dev = dev;
if (dev)
dev_hold(dev);
dst->ops = ops;
dst_init_metrics(dst, dst_default_metrics, true);
dst->path = dst;
dst->input = dst_discard;
#ifndef HAVE_DST_DISCARD_SK
dst->output = dst_discard;
#else
dst->output = dst_discard_sk;
#endif
dst->obsolete = initial_obsolete;
atomic_set(&dst->__refcnt, initial_ref);
dst->lastuse = jiffies;
dst->flags = flags;
if (!(flags & DST_NOCOUNT))
dst_entries_add(ops, 1);
}
#define dst_init rpl_dst_init
#endif
#endif
|
