4 #include <linux/rhashtable.h>
5 #include <linux/atomic.h>
8 #define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
9 #define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
12 /* struct sock has to be the first member of netlink_sock */
20 unsigned long *groups;
22 size_t max_recvmsg_len;
23 wait_queue_head_t wait;
26 struct netlink_callback cb;
27 struct mutex *cb_mutex;
28 struct mutex cb_def_mutex;
29 void (*netlink_rcv)(struct sk_buff *skb);
30 int (*netlink_bind)(struct net *net, int group);
31 void (*netlink_unbind)(struct net *net, int group);
32 struct module *module;
34 struct rhash_head node;
38 static inline struct netlink_sock *nlk_sk(struct sock *sk)
40 return container_of(sk, struct netlink_sock, sk);
43 struct netlink_table {
44 struct rhashtable hash;
45 struct hlist_head mc_list;
46 struct listeners __rcu *listeners;
49 struct mutex *cb_mutex;
50 struct module *module;
51 int (*bind)(struct net *net, int group);
52 void (*unbind)(struct net *net, int group);
53 bool (*compare)(struct net *net, struct sock *sock);
57 extern struct netlink_table *nl_table;
58 extern rwlock_t nl_table_lock;