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))
14 unsigned int frames_per_block;
15 unsigned int frame_size;
16 unsigned int frame_max;
18 unsigned int pg_vec_order;
19 unsigned int pg_vec_pages;
20 unsigned int pg_vec_len;
26 /* struct sock has to be the first member of netlink_sock */
34 unsigned long *groups;
36 size_t max_recvmsg_len;
37 wait_queue_head_t wait;
39 struct netlink_callback cb;
40 struct mutex *cb_mutex;
41 struct mutex cb_def_mutex;
42 void (*netlink_rcv)(struct sk_buff *skb);
43 int (*netlink_bind)(struct net *net, int group);
44 void (*netlink_unbind)(struct net *net, int group);
45 struct module *module;
46 #ifdef CONFIG_NETLINK_MMAP
47 struct mutex pg_vec_lock;
48 struct netlink_ring rx_ring;
49 struct netlink_ring tx_ring;
51 #endif /* CONFIG_NETLINK_MMAP */
53 struct rhash_head node;
56 static inline struct netlink_sock *nlk_sk(struct sock *sk)
58 return container_of(sk, struct netlink_sock, sk);
61 struct netlink_table {
62 struct rhashtable hash;
63 struct hlist_head mc_list;
64 struct listeners __rcu *listeners;
67 struct mutex *cb_mutex;
68 struct module *module;
69 int (*bind)(struct net *net, int group);
70 void (*unbind)(struct net *net, int group);
71 bool (*compare)(struct net *net, struct sock *sock);
75 extern struct netlink_table *nl_table;
76 extern rwlock_t nl_table_lock;
77 extern struct mutex nl_sk_hash_lock;