4 #include <linux/rhashtable.h>
7 #define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
8 #define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
13 unsigned int frames_per_block;
14 unsigned int frame_size;
15 unsigned int frame_max;
17 unsigned int pg_vec_order;
18 unsigned int pg_vec_pages;
19 unsigned int pg_vec_len;
25 /* struct sock has to be the first member of netlink_sock */
33 unsigned long *groups;
35 size_t max_recvmsg_len;
36 wait_queue_head_t wait;
38 struct netlink_callback cb;
39 struct mutex *cb_mutex;
40 struct mutex cb_def_mutex;
41 void (*netlink_rcv)(struct sk_buff *skb);
42 int (*netlink_bind)(int group);
43 void (*netlink_unbind)(int group);
44 struct module *module;
45 #ifdef CONFIG_NETLINK_MMAP
46 struct mutex pg_vec_lock;
47 struct netlink_ring rx_ring;
48 struct netlink_ring tx_ring;
50 #endif /* CONFIG_NETLINK_MMAP */
52 struct rhash_head node;
55 static inline struct netlink_sock *nlk_sk(struct sock *sk)
57 return container_of(sk, struct netlink_sock, sk);
60 struct netlink_table {
61 struct rhashtable hash;
62 struct hlist_head mc_list;
63 struct listeners __rcu *listeners;
66 struct mutex *cb_mutex;
67 struct module *module;
68 int (*bind)(int group);
69 void (*unbind)(int group);
70 bool (*compare)(struct net *net, struct sock *sock);
74 extern struct netlink_table *nl_table;
75 extern rwlock_t nl_table_lock;
76 extern struct mutex nl_sk_hash_lock;