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0f29c768 AV |
1 | #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 | ||
ccdfcc39 PM |
9 | struct 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 | ||
0f29c768 AV |
23 | struct 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; | |
9063e21f | 34 | size_t max_recvmsg_len; |
0f29c768 | 35 | wait_queue_head_t wait; |
16b304f3 PS |
36 | bool cb_running; |
37 | struct netlink_callback cb; | |
0f29c768 AV |
38 | struct mutex *cb_mutex; |
39 | struct mutex cb_def_mutex; | |
40 | void (*netlink_rcv)(struct sk_buff *skb); | |
4f520900 RGB |
41 | int (*netlink_bind)(int group); |
42 | void (*netlink_unbind)(int group); | |
0f29c768 | 43 | struct module *module; |
ccdfcc39 PM |
44 | #ifdef CONFIG_NETLINK_MMAP |
45 | struct mutex pg_vec_lock; | |
46 | struct netlink_ring rx_ring; | |
47 | struct netlink_ring tx_ring; | |
48 | atomic_t mapped; | |
49 | #endif /* CONFIG_NETLINK_MMAP */ | |
0f29c768 AV |
50 | }; |
51 | ||
52 | static inline struct netlink_sock *nlk_sk(struct sock *sk) | |
53 | { | |
54 | return container_of(sk, struct netlink_sock, sk); | |
55 | } | |
56 | ||
57 | struct nl_portid_hash { | |
58 | struct hlist_head *table; | |
59 | unsigned long rehash_time; | |
60 | ||
61 | unsigned int mask; | |
62 | unsigned int shift; | |
63 | ||
64 | unsigned int entries; | |
65 | unsigned int max_shift; | |
66 | ||
67 | u32 rnd; | |
68 | }; | |
69 | ||
70 | struct netlink_table { | |
71 | struct nl_portid_hash hash; | |
72 | struct hlist_head mc_list; | |
73 | struct listeners __rcu *listeners; | |
74 | unsigned int flags; | |
75 | unsigned int groups; | |
76 | struct mutex *cb_mutex; | |
77 | struct module *module; | |
4f520900 RGB |
78 | int (*bind)(int group); |
79 | void (*unbind)(int group); | |
da12c90e | 80 | bool (*compare)(struct net *net, struct sock *sock); |
0f29c768 AV |
81 | int registered; |
82 | }; | |
83 | ||
84 | extern struct netlink_table *nl_table; | |
85 | extern rwlock_t nl_table_lock; | |
86 | ||
87 | #endif |