1 #ifndef _AF_NETLINK_H 2 #define _AF_NETLINK_H 3 4 #include <net/sock.h> 5 6 #define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8) 7 #define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long)) 8 9 struct netlink_ring { 10 void **pg_vec; 11 unsigned int head; 12 unsigned int frames_per_block; 13 unsigned int frame_size; 14 unsigned int frame_max; 15 16 unsigned int pg_vec_order; 17 unsigned int pg_vec_pages; 18 unsigned int pg_vec_len; 19 20 atomic_t pending; 21 }; 22 23 struct netlink_sock { 24 /* struct sock has to be the first member of netlink_sock */ 25 struct sock sk; 26 u32 portid; 27 u32 dst_portid; 28 u32 dst_group; 29 u32 flags; 30 u32 subscriptions; 31 u32 ngroups; 32 unsigned long *groups; 33 unsigned long state; 34 size_t max_recvmsg_len; 35 wait_queue_head_t wait; 36 bool cb_running; 37 struct netlink_callback cb; 38 struct mutex *cb_mutex; 39 struct mutex cb_def_mutex; 40 void (*netlink_rcv)(struct sk_buff *skb); 41 void (*netlink_bind)(int group); 42 struct module *module; 43 #ifdef CONFIG_NETLINK_MMAP 44 struct mutex pg_vec_lock; 45 struct netlink_ring rx_ring; 46 struct netlink_ring tx_ring; 47 atomic_t mapped; 48 #endif /* CONFIG_NETLINK_MMAP */ 49 }; 50 51 static inline struct netlink_sock *nlk_sk(struct sock *sk) 52 { 53 return container_of(sk, struct netlink_sock, sk); 54 } 55 56 struct nl_portid_hash { 57 struct hlist_head *table; 58 unsigned long rehash_time; 59 60 unsigned int mask; 61 unsigned int shift; 62 63 unsigned int entries; 64 unsigned int max_shift; 65 66 u32 rnd; 67 }; 68 69 struct netlink_table { 70 struct nl_portid_hash hash; 71 struct hlist_head mc_list; 72 struct listeners __rcu *listeners; 73 unsigned int flags; 74 unsigned int groups; 75 struct mutex *cb_mutex; 76 struct module *module; 77 void (*bind)(int group); 78 bool (*compare)(struct net *net, struct sock *sock); 79 int registered; 80 }; 81 82 extern struct netlink_table *nl_table; 83 extern rwlock_t nl_table_lock; 84 85 #endif 86