1#ifndef _AF_NETLINK_H
 2#define _AF_NETLINK_H
 3
 4#include <linux/rhashtable.h>
 5#include <linux/atomic.h>
 6#include <linux/workqueue.h>
 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
12struct 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;
23	size_t			max_recvmsg_len;
24	wait_queue_head_t	wait;
25	bool			bound;
26	bool			cb_running;
 
27	struct netlink_callback	cb;
28	struct mutex		*cb_mutex;
29	struct mutex		cb_def_mutex;
 
30	void			(*netlink_rcv)(struct sk_buff *skb);
31	int			(*netlink_bind)(struct net *net, int group);
32	void			(*netlink_unbind)(struct net *net, int group);
 
 
33	struct module		*module;
34
35	struct rhash_head	node;
36	struct rcu_head		rcu;
37	struct work_struct	work;
38};
39
40static inline struct netlink_sock *nlk_sk(struct sock *sk)
41{
42	return container_of(sk, struct netlink_sock, sk);
43}
44
 
 
45struct netlink_table {
46	struct rhashtable	hash;
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;
53	int			(*bind)(struct net *net, int group);
54	void			(*unbind)(struct net *net, int group);
55	bool			(*compare)(struct net *net, struct sock *sock);
 
56	int			registered;
57};
58
59extern struct netlink_table *nl_table;
60extern rwlock_t nl_table_lock;
61
62#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _AF_NETLINK_H
 3#define _AF_NETLINK_H
 4
 5#include <linux/rhashtable.h>
 6#include <linux/atomic.h>
 7#include <linux/workqueue.h>
 8#include <net/sock.h>
 9
10/* flags */
11enum {
12	NETLINK_F_KERNEL_SOCKET,
13	NETLINK_F_RECV_PKTINFO,
14	NETLINK_F_BROADCAST_SEND_ERROR,
15	NETLINK_F_RECV_NO_ENOBUFS,
16	NETLINK_F_LISTEN_ALL_NSID,
17	NETLINK_F_CAP_ACK,
18	NETLINK_F_EXT_ACK,
19	NETLINK_F_STRICT_CHK,
20};
21
22#define NLGRPSZ(x)	(ALIGN(x, sizeof(unsigned long) * 8) / 8)
23#define NLGRPLONGS(x)	(NLGRPSZ(x)/sizeof(unsigned long))
24
25struct netlink_sock {
26	/* struct sock has to be the first member of netlink_sock */
27	struct sock		sk;
28	unsigned long		flags;
29	u32			portid;
30	u32			dst_portid;
31	u32			dst_group;
 
32	u32			subscriptions;
33	u32			ngroups;
34	unsigned long		*groups;
35	unsigned long		state;
36	size_t			max_recvmsg_len;
37	wait_queue_head_t	wait;
38	bool			bound;
39	bool			cb_running;
40	int			dump_done_errno;
41	struct netlink_callback	cb;
42	struct mutex		nl_cb_mutex;
43
44	struct mutex		*dump_cb_mutex;
45	void			(*netlink_rcv)(struct sk_buff *skb);
46	int			(*netlink_bind)(struct net *net, int group);
47	void			(*netlink_unbind)(struct net *net, int group);
48	void			(*netlink_release)(struct sock *sk,
49						   unsigned long *groups);
50	struct module		*module;
51
52	struct rhash_head	node;
53	struct rcu_head		rcu;
54	struct work_struct	work;
55};
56
57static inline struct netlink_sock *nlk_sk(struct sock *sk)
58{
59	return container_of(sk, struct netlink_sock, sk);
60}
61
62#define nlk_test_bit(nr, sk) test_bit(NETLINK_F_##nr, &nlk_sk(sk)->flags)
63
64struct netlink_table {
65	struct rhashtable	hash;
66	struct hlist_head	mc_list;
67	struct listeners __rcu	*listeners;
68	unsigned int		flags;
69	unsigned int		groups;
70	struct mutex		*cb_mutex;
71	struct module		*module;
72	int			(*bind)(struct net *net, int group);
73	void			(*unbind)(struct net *net, int group);
74	void                    (*release)(struct sock *sk,
75					   unsigned long *groups);
76	int			registered;
77};
78
79extern struct netlink_table *nl_table;
80extern rwlock_t nl_table_lock;
81
82#endif