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 wait_queue_head_t wait; 35 struct netlink_callback *cb; 36 struct mutex *cb_mutex; 37 struct mutex cb_def_mutex; 38 void (*netlink_rcv)(struct sk_buff *skb); 39 void (*netlink_bind)(int group); 40 struct module *module; 41 #ifdef CONFIG_NETLINK_MMAP 42 struct mutex pg_vec_lock; 43 struct netlink_ring rx_ring; 44 struct netlink_ring tx_ring; 45 atomic_t mapped; 46 #endif /* CONFIG_NETLINK_MMAP */ 47 }; 48 49 static inline struct netlink_sock *nlk_sk(struct sock *sk) 50 { 51 return container_of(sk, struct netlink_sock, sk); 52 } 53 54 struct nl_portid_hash { 55 struct hlist_head *table; 56 unsigned long rehash_time; 57 58 unsigned int mask; 59 unsigned int shift; 60 61 unsigned int entries; 62 unsigned int max_shift; 63 64 u32 rnd; 65 }; 66 67 struct netlink_table { 68 struct nl_portid_hash hash; 69 struct hlist_head mc_list; 70 struct listeners __rcu *listeners; 71 unsigned int flags; 72 unsigned int groups; 73 struct mutex *cb_mutex; 74 struct module *module; 75 void (*bind)(int group); 76 int registered; 77 }; 78 79 extern struct netlink_table *nl_table; 80 extern rwlock_t nl_table_lock; 81 82 #endif 83