4 #include <linux/rhashtable.h>
5 #include <linux/atomic.h>
6 #include <linux/workqueue.h>
10 #define NETLINK_F_KERNEL_SOCKET 0x1
11 #define NETLINK_F_RECV_PKTINFO 0x2
12 #define NETLINK_F_BROADCAST_SEND_ERROR 0x4
13 #define NETLINK_F_RECV_NO_ENOBUFS 0x8
14 #define NETLINK_F_LISTEN_ALL_NSID 0x10
15 #define NETLINK_F_CAP_ACK 0x20
16 #define NETLINK_F_EXT_ACK 0x40
18 #define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
19 #define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
22 /* struct sock has to be the first member of netlink_sock */
30 unsigned long *groups;
32 size_t max_recvmsg_len;
33 wait_queue_head_t wait;
36 struct netlink_callback cb;
37 struct mutex *cb_mutex;
38 struct mutex cb_def_mutex;
39 void (*netlink_rcv)(struct sk_buff *skb);
40 int (*netlink_bind)(struct net *net, int group);
41 void (*netlink_unbind)(struct net *net, int group);
42 struct module *module;
44 struct rhash_head node;
46 struct work_struct work;
49 static inline struct netlink_sock *nlk_sk(struct sock *sk)
51 return container_of(sk, struct netlink_sock, sk);
54 struct netlink_table {
55 struct rhashtable hash;
56 struct hlist_head mc_list;
57 struct listeners __rcu *listeners;
60 struct mutex *cb_mutex;
61 struct module *module;
62 int (*bind)(struct net *net, int group);
63 void (*unbind)(struct net *net, int group);
64 bool (*compare)(struct net *net, struct sock *sock);
68 extern struct netlink_table *nl_table;
69 extern rwlock_t nl_table_lock;