4 #include <linux/rhashtable.h>
5 #include <linux/atomic.h>
6 #include <linux/workqueue.h>
9 #define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
10 #define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
13 /* struct sock has to be the first member of netlink_sock */
21 unsigned long *groups;
23 size_t max_recvmsg_len;
24 wait_queue_head_t wait;
28 struct netlink_callback cb;
29 struct mutex *cb_mutex;
30 struct mutex cb_def_mutex;
31 void (*netlink_rcv)(struct sk_buff *skb);
32 int (*netlink_bind)(struct net *net, int group);
33 void (*netlink_unbind)(struct net *net, int group);
34 struct module *module;
36 struct rhash_head node;
38 struct work_struct work;
41 static inline struct netlink_sock *nlk_sk(struct sock *sk)
43 return container_of(sk, struct netlink_sock, sk);
46 struct netlink_table {
47 struct rhashtable hash;
48 struct hlist_head mc_list;
49 struct listeners __rcu *listeners;
52 struct mutex *cb_mutex;
53 struct module *module;
54 int (*bind)(struct net *net, int group);
55 void (*unbind)(struct net *net, int group);
56 bool (*compare)(struct net *net, struct sock *sock);
60 extern struct netlink_table *nl_table;
61 extern rwlock_t nl_table_lock;