[mirror_ubuntu-artful-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>

/* flags */
#define NETLINK_F_KERNEL_SOCKET		0x1
#define NETLINK_F_RECV_PKTINFO		0x2
#define NETLINK_F_BROADCAST_SEND_ERROR	0x4
#define NETLINK_F_RECV_NO_ENOBUFS	0x8
#define NETLINK_F_LISTEN_ALL_NSID	0x10
#define NETLINK_F_CAP_ACK		0x20
#define NETLINK_F_EXT_ACK		0x40

#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>
0f29c768 AV	8
457c79e5 AV	9	/* flags */
	10	#define NETLINK_F_KERNEL_SOCKET 0x1
	11	#define NETLINK_F_RECV_PKTINFO 0x2
	12	#define NETLINK_F_BROADCAST_SEND_ERROR 0x4
	13	#define NETLINK_F_RECV_NO_ENOBUFS 0x8
	14	#define NETLINK_F_LISTEN_ALL_NSID 0x10
	15	#define NETLINK_F_CAP_ACK 0x20
2d4bc933	16	#define NETLINK_F_EXT_ACK 0x40
457c79e5	17
0f29c768 AV	18	#define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
	19	#define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
	20
	21	struct netlink_sock {
	22	/* struct sock has to be the first member of netlink_sock */
	23	struct sock sk;
	24	u32 portid;
	25	u32 dst_portid;
	26	u32 dst_group;
	27	u32 flags;
	28	u32 subscriptions;
	29	u32 ngroups;
	30	unsigned long *groups;
	31	unsigned long state;
9063e21f	32	size_t max_recvmsg_len;
0f29c768	33	wait_queue_head_t wait;
da314c99	34	bool bound;
16b304f3 PS	35	bool cb_running;
16b304f3 PS	36	struct netlink_callback cb;
0f29c768 AV	37	struct mutex *cb_mutex;
	38	struct mutex cb_def_mutex;
	39	void (netlink_rcv)(struct sk_buff skb);
023e2cfa JB	40	int (netlink_bind)(struct net net, int group);
023e2cfa JB	41	void (netlink_unbind)(struct net net, int group);
0f29c768	42	struct module *module;
e341694e TG	43
e341694e TG	44	struct rhash_head node;
21e4902a	45	struct rcu_head rcu;
707693c8	46	struct work_struct work;
0f29c768 AV	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
0f29c768	54	struct netlink_table {
e341694e	55	struct rhashtable hash;
0f29c768 AV	56	struct hlist_head mc_list;
	57	struct listeners __rcu *listeners;
	58	unsigned int flags;
	59	unsigned int groups;
	60	struct mutex *cb_mutex;
	61	struct module *module;
023e2cfa JB	62	int (bind)(struct net net, int group);
023e2cfa JB	63	void (unbind)(struct net net, int group);
da12c90e	64	bool (compare)(struct net net, struct sock *sock);
0f29c768 AV	65	int registered;
	66	};
	67
	68	extern struct netlink_table *nl_table;
	69	extern rwlock_t nl_table_lock;
	70
	71	#endif