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
;
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