-
Notifications
You must be signed in to change notification settings - Fork 1.9k
/
dst_cache.h
114 lines (100 loc) · 3.05 KB
/
dst_cache.h
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
104
105
106
107
108
109
110
111
112
113
114
#ifndef _NET_DST_CACHE_WRAPPER_H
#define _NET_DST_CACHE_WRAPPER_H
#ifdef USE_BUILTIN_DST_CACHE
#include_next <net/dst_cache.h>
#else
#include <linux/jiffies.h>
#include <net/dst.h>
#if IS_ENABLED(CONFIG_IPV6)
#include <net/ip6_fib.h>
#endif
#ifdef USE_UPSTREAM_TUNNEL
#include_next <net/dst_cache.h>
#else
struct dst_cache {
struct dst_cache_pcpu __percpu *cache;
unsigned long reset_ts;
};
/**
* dst_cache_get - perform cache lookup
* @dst_cache: the cache
*
* The caller should use dst_cache_get_ip4() if it need to retrieve the
* source address to be used when xmitting to the cached dst.
* local BH must be disabled.
*/
#define rpl_dst_cache_get dst_cache_get
struct dst_entry *rpl_dst_cache_get(struct dst_cache *dst_cache);
/**
* dst_cache_get_ip4 - perform cache lookup and fetch ipv4 source address
* @dst_cache: the cache
* @saddr: return value for the retrieved source address
*
* local BH must be disabled.
*/
#define rpl_dst_cache_get_ip4 dst_cache_get_ip4
struct rtable *rpl_dst_cache_get_ip4(struct dst_cache *dst_cache, __be32 *saddr);
/**
* dst_cache_set_ip4 - store the ipv4 dst into the cache
* @dst_cache: the cache
* @dst: the entry to be cached
* @saddr: the source address to be stored inside the cache
*
* local BH must be disabled.
*/
#define rpl_dst_cache_set_ip4 dst_cache_set_ip4
void rpl_dst_cache_set_ip4(struct dst_cache *dst_cache, struct dst_entry *dst,
__be32 saddr);
#if IS_ENABLED(CONFIG_IPV6)
/**
* dst_cache_set_ip6 - store the ipv6 dst into the cache
* @dst_cache: the cache
* @dst: the entry to be cached
* @saddr: the source address to be stored inside the cache
*
* local BH must be disabled.
*/
#define rpl_dst_cache_set_ip6 dst_cache_set_ip6
void rpl_dst_cache_set_ip6(struct dst_cache *dst_cache, struct dst_entry *dst,
const struct in6_addr *addr);
/**
* dst_cache_get_ip6 - perform cache lookup and fetch ipv6 source address
* @dst_cache: the cache
* @saddr: return value for the retrieved source address
*
* local BH must be disabled.
*/
#define rpl_dst_cache_get_ip6 dst_cache_get_ip6
struct dst_entry *rpl_dst_cache_get_ip6(struct dst_cache *dst_cache,
struct in6_addr *saddr);
#endif
/**
* dst_cache_reset - invalidate the cache contents
* @dst_cache: the cache
*
* This do not free the cached dst to avoid races and contentions.
* the dst will be freed on later cache lookup.
*/
static inline void dst_cache_reset(struct dst_cache *dst_cache)
{
dst_cache->reset_ts = jiffies;
}
/**
* dst_cache_init - initialize the cache, allocating the required storage
* @dst_cache: the cache
* @gfp: allocation flags
*/
#define rpl_dst_cache_init dst_cache_init
int rpl_dst_cache_init(struct dst_cache *dst_cache, gfp_t gfp);
/**
* dst_cache_destroy - empty the cache and free the allocated storage
* @dst_cache: the cache
*
* No synchronization is enforced: it must be called only when the cache
* is unsed.
*/
#define rpl_dst_cache_destroy dst_cache_destroy
void rpl_dst_cache_destroy(struct dst_cache *dst_cache);
#endif /* USE_UPSTREAM_TUNNEL */
#endif /* USE_BUILTIN_DST_CACHE */
#endif