blob: ed8522265f4eb08ecedf9e7fd6f37386beb6dddd [file] [log] [blame]
Andrey Vagin0f29c762013-03-21 20:33:47 +04001#ifndef _AF_NETLINK_H
2#define _AF_NETLINK_H
3
4#include <net/sock.h>
5
6#define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
7#define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
8
Patrick McHardyccdfcc32013-04-17 06:47:01 +00009struct netlink_ring {
10 void **pg_vec;
11 unsigned int head;
12 unsigned int frames_per_block;
13 unsigned int frame_size;
14 unsigned int frame_max;
15
16 unsigned int pg_vec_order;
17 unsigned int pg_vec_pages;
18 unsigned int pg_vec_len;
19
20 atomic_t pending;
21};
22
Andrey Vagin0f29c762013-03-21 20:33:47 +040023struct netlink_sock {
24 /* struct sock has to be the first member of netlink_sock */
25 struct sock sk;
26 u32 portid;
27 u32 dst_portid;
28 u32 dst_group;
29 u32 flags;
30 u32 subscriptions;
31 u32 ngroups;
32 unsigned long *groups;
33 unsigned long state;
34 wait_queue_head_t wait;
35 struct netlink_callback *cb;
36 struct mutex *cb_mutex;
37 struct mutex cb_def_mutex;
38 void (*netlink_rcv)(struct sk_buff *skb);
39 void (*netlink_bind)(int group);
40 struct module *module;
Patrick McHardyccdfcc32013-04-17 06:47:01 +000041#ifdef CONFIG_NETLINK_MMAP
42 struct mutex pg_vec_lock;
43 struct netlink_ring rx_ring;
44 struct netlink_ring tx_ring;
45 atomic_t mapped;
46#endif /* CONFIG_NETLINK_MMAP */
Andrey Vagin0f29c762013-03-21 20:33:47 +040047};
48
49static inline struct netlink_sock *nlk_sk(struct sock *sk)
50{
51 return container_of(sk, struct netlink_sock, sk);
52}
53
54struct nl_portid_hash {
55 struct hlist_head *table;
56 unsigned long rehash_time;
57
58 unsigned int mask;
59 unsigned int shift;
60
61 unsigned int entries;
62 unsigned int max_shift;
63
64 u32 rnd;
65};
66
67struct netlink_table {
68 struct nl_portid_hash hash;
69 struct hlist_head mc_list;
70 struct listeners __rcu *listeners;
71 unsigned int flags;
72 unsigned int groups;
73 struct mutex *cb_mutex;
74 struct module *module;
75 void (*bind)(int group);
76 int registered;
77};
78
79extern struct netlink_table *nl_table;
80extern rwlock_t nl_table_lock;
81
82#endif