blob: acbd774eeb7c5afd568d8eb9aa375ecc81949793 [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;
Pravin B Shelar16b304f2013-08-15 15:31:06 -070035 bool cb_running;
36 struct netlink_callback cb;
Andrey Vagin0f29c762013-03-21 20:33:47 +040037 struct mutex *cb_mutex;
38 struct mutex cb_def_mutex;
39 void (*netlink_rcv)(struct sk_buff *skb);
40 void (*netlink_bind)(int group);
41 struct module *module;
Patrick McHardyccdfcc32013-04-17 06:47:01 +000042#ifdef CONFIG_NETLINK_MMAP
43 struct mutex pg_vec_lock;
44 struct netlink_ring rx_ring;
45 struct netlink_ring tx_ring;
46 atomic_t mapped;
47#endif /* CONFIG_NETLINK_MMAP */
Andrey Vagin0f29c762013-03-21 20:33:47 +040048};
49
50static inline struct netlink_sock *nlk_sk(struct sock *sk)
51{
52 return container_of(sk, struct netlink_sock, sk);
53}
54
55struct nl_portid_hash {
56 struct hlist_head *table;
57 unsigned long rehash_time;
58
59 unsigned int mask;
60 unsigned int shift;
61
62 unsigned int entries;
63 unsigned int max_shift;
64
65 u32 rnd;
66};
67
68struct netlink_table {
69 struct nl_portid_hash hash;
70 struct hlist_head mc_list;
71 struct listeners __rcu *listeners;
72 unsigned int flags;
73 unsigned int groups;
74 struct mutex *cb_mutex;
75 struct module *module;
76 void (*bind)(int group);
Gao fengda12c902013-06-06 14:49:11 +080077 bool (*compare)(struct net *net, struct sock *sock);
Andrey Vagin0f29c762013-03-21 20:33:47 +040078 int registered;
79};
80
81extern struct netlink_table *nl_table;
82extern rwlock_t nl_table_lock;
83
84#endif