1#ifndef __LINUX_NET_AFUNIX_H
 2#define __LINUX_NET_AFUNIX_H
 3
 4#include <linux/socket.h>
 5#include <linux/un.h>
 6#include <linux/mutex.h>
 7#include <net/sock.h>
 8
 9extern void unix_inflight(struct file *fp);
10extern void unix_notinflight(struct file *fp);
11extern void unix_gc(void);
12extern void wait_for_unix_gc(void);
13extern struct sock *unix_get_socket(struct file *filp);
 
14
15#define UNIX_HASH_SIZE	256
16
17extern unsigned int unix_tot_inflight;
 
 
18
19struct unix_address {
20	atomic_t	refcnt;
21	int		len;
22	unsigned	hash;
23	struct sockaddr_un name[0];
24};
25
26struct unix_skb_parms {
27	struct pid		*pid;		/* Skb credentials	*/
28	const struct cred	*cred;
29	struct scm_fp_list	*fp;		/* Passed files		*/
30#ifdef CONFIG_SECURITY_NETWORK
31	u32			secid;		/* Security ID		*/
32#endif
33};
34
35#define UNIXCB(skb) 	(*(struct unix_skb_parms *)&((skb)->cb))
36#define UNIXSID(skb)	(&UNIXCB((skb)).secid)
37
38#define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)
39#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)
40#define unix_state_lock_nested(s) \
41				spin_lock_nested(&unix_sk(s)->lock, \
42				SINGLE_DEPTH_NESTING)
43
44/* The AF_UNIX socket */
45struct unix_sock {
46	/* WARNING: sk has to be the first member */
47	struct sock		sk;
48	struct unix_address     *addr;
49	struct dentry		*dentry;
50	struct vfsmount		*mnt;
51	struct mutex		readlock;
52	struct sock		*peer;
53	struct sock		*other;
54	struct list_head	link;
55	atomic_long_t		inflight;
56	spinlock_t		lock;
57	unsigned int		gc_candidate : 1;
58	unsigned int		gc_maybe_cycle : 1;
59	unsigned char		recursion_level;
60	struct socket_wq	peer_wq;
61};
62#define unix_sk(__sk) ((struct unix_sock *)__sk)
63
64#define peer_wait peer_wq.wait
 
 
 
65
66#ifdef CONFIG_SYSCTL
67extern int unix_sysctl_register(struct net *net);
68extern void unix_sysctl_unregister(struct net *net);
69#else
70static inline int unix_sysctl_register(struct net *net) { return 0; }
71static inline void unix_sysctl_unregister(struct net *net) {}
72#endif
73#endif

 1#ifndef __LINUX_NET_AFUNIX_H
 2#define __LINUX_NET_AFUNIX_H
 3
 4#include <linux/socket.h>
 5#include <linux/un.h>
 6#include <linux/mutex.h>
 7#include <net/sock.h>
 8
 9extern void unix_inflight(struct file *fp);
10extern void unix_notinflight(struct file *fp);
11extern void unix_gc(void);
12extern void wait_for_unix_gc(void);
13extern struct sock *unix_get_socket(struct file *filp);
14extern struct sock *unix_peer_get(struct sock *);
15
16#define UNIX_HASH_SIZE	256
17
18extern unsigned int unix_tot_inflight;
19extern spinlock_t unix_table_lock;
20extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
21
22struct unix_address {
23	atomic_t	refcnt;
24	int		len;
25	unsigned int	hash;
26	struct sockaddr_un name[0];
27};
28
29struct unix_skb_parms {
30	struct pid		*pid;		/* Skb credentials	*/
31	const struct cred	*cred;
32	struct scm_fp_list	*fp;		/* Passed files		*/
33#ifdef CONFIG_SECURITY_NETWORK
34	u32			secid;		/* Security ID		*/
35#endif
36};
37
38#define UNIXCB(skb) 	(*(struct unix_skb_parms *)&((skb)->cb))
39#define UNIXSID(skb)	(&UNIXCB((skb)).secid)
40
41#define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)
42#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)
43#define unix_state_lock_nested(s) \
44				spin_lock_nested(&unix_sk(s)->lock, \
45				SINGLE_DEPTH_NESTING)
46
47/* The AF_UNIX socket */
48struct unix_sock {
49	/* WARNING: sk has to be the first member */
50	struct sock		sk;
51	struct unix_address     *addr;
52	struct path		path;
 
53	struct mutex		readlock;
54	struct sock		*peer;
55	struct sock		*other;
56	struct list_head	link;
57	atomic_long_t		inflight;
58	spinlock_t		lock;
59	unsigned int		gc_candidate : 1;
60	unsigned int		gc_maybe_cycle : 1;
61	unsigned char		recursion_level;
62	struct socket_wq	peer_wq;
63};
64#define unix_sk(__sk) ((struct unix_sock *)__sk)
65
66#define peer_wait peer_wq.wait
67
68long unix_inq_len(struct sock *sk);
69long unix_outq_len(struct sock *sk);
70
71#ifdef CONFIG_SYSCTL
72extern int unix_sysctl_register(struct net *net);
73extern void unix_sysctl_unregister(struct net *net);
74#else
75static inline int unix_sysctl_register(struct net *net) { return 0; }
76static inline void unix_sysctl_unregister(struct net *net) {}
77#endif
78#endif