[mirror_ubuntu-zesty-kernel.git] / net / netlink / af_netlink.h

#ifndef _AF_NETLINK_H
#define _AF_NETLINK_H

#include <linux/rhashtable.h>
#include <linux/atomic.h>
#include <linux/workqueue.h>
#include <net/sock.h>

#define NLGRPSZ(x)	(ALIGN(x, sizeof(unsigned long) * 8) / 8)
#define NLGRPLONGS(x)	(NLGRPSZ(x)/sizeof(unsigned long))

struct netlink_sock {
	/* struct sock has to be the first member of netlink_sock */
	struct sock		sk;
	u32			portid;
	u32			dst_portid;
	u32			dst_group;
	u32			flags;
	u32			subscriptions;
	u32			ngroups;
	unsigned long		*groups;
	unsigned long		state;
	size_t			max_recvmsg_len;
	wait_queue_head_t	wait;
	bool			bound;
	bool			cb_running;
	struct netlink_callback	cb;
	struct mutex		*cb_mutex;
	struct mutex		cb_def_mutex;
	void			(*netlink_rcv)(struct sk_buff *skb);
	int			(*netlink_bind)(struct net *net, int group);
	void			(*netlink_unbind)(struct net *net, int group);
	struct module		*module;

	struct rhash_head	node;
	struct rcu_head		rcu;
	struct work_struct	work;
};

static inline struct netlink_sock *nlk_sk(struct sock *sk)
{
	return container_of(sk, struct netlink_sock, sk);
}

struct netlink_table {
	struct rhashtable	hash;
	struct hlist_head	mc_list;
	struct listeners __rcu	*listeners;
	unsigned int		flags;
	unsigned int		groups;
	struct mutex		*cb_mutex;
	struct module		*module;
	int			(*bind)(struct net *net, int group);
	void			(*unbind)(struct net *net, int group);
	bool			(*compare)(struct net *net, struct sock *sock);
	int			registered;
};

extern struct netlink_table *nl_table;
extern rwlock_t nl_table_lock;

#endif
Commit	Line	Data
0f29c768 AV	1	#ifndef _AF_NETLINK_H
	2	#define _AF_NETLINK_H
	3
e341694e	4	#include <linux/rhashtable.h>
ee1c2442	5	#include <linux/atomic.h>
707693c8	6	#include <linux/workqueue.h>
0f29c768 AV	7	#include <net/sock.h>
	8
	9	#define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
	10	#define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
	11
	12	struct netlink_sock {
	13	/* struct sock has to be the first member of netlink_sock */
	14	struct sock sk;
	15	u32 portid;
	16	u32 dst_portid;
	17	u32 dst_group;
	18	u32 flags;
	19	u32 subscriptions;
	20	u32 ngroups;
	21	unsigned long *groups;
	22	unsigned long state;
9063e21f	23	size_t max_recvmsg_len;
0f29c768	24	wait_queue_head_t wait;
da314c99	25	bool bound;
16b304f3 PS	26	bool cb_running;
16b304f3 PS	27	struct netlink_callback cb;
0f29c768 AV	28	struct mutex *cb_mutex;
	29	struct mutex cb_def_mutex;
	30	void (netlink_rcv)(struct sk_buff skb);
023e2cfa JB	31	int (netlink_bind)(struct net net, int group);
023e2cfa JB	32	void (netlink_unbind)(struct net net, int group);
0f29c768	33	struct module *module;
e341694e TG	34
e341694e TG	35	struct rhash_head node;
21e4902a	36	struct rcu_head rcu;
707693c8	37	struct work_struct work;
0f29c768 AV	38	};
	39
	40	static inline struct netlink_sock nlk_sk(struct sock sk)
	41	{
	42	return container_of(sk, struct netlink_sock, sk);
	43	}
	44
0f29c768	45	struct netlink_table {
e341694e	46	struct rhashtable hash;
0f29c768 AV	47	struct hlist_head mc_list;
	48	struct listeners __rcu *listeners;
	49	unsigned int flags;
	50	unsigned int groups;
	51	struct mutex *cb_mutex;
	52	struct module *module;
023e2cfa JB	53	int (bind)(struct net net, int group);
023e2cfa JB	54	void (unbind)(struct net net, int group);
da12c90e	55	bool (compare)(struct net net, struct sock *sock);
0f29c768 AV	56	int registered;
	57	};
	58
	59	extern struct netlink_table *nl_table;
	60	extern rwlock_t nl_table_lock;
	61
	62	#endif