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/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __LINUX_NET_AFUNIX_H
 3#define __LINUX_NET_AFUNIX_H
 4
 5#include <linux/socket.h>
 6#include <linux/un.h>
 7#include <linux/mutex.h>
 8#include <linux/refcount.h>
 9#include <net/sock.h>
10
11void unix_inflight(struct user_struct *user, struct file *fp);
12void unix_notinflight(struct user_struct *user, struct file *fp);
13void unix_gc(void);
14void wait_for_unix_gc(void);
15struct sock *unix_get_socket(struct file *filp);
16struct sock *unix_peer_get(struct sock *);
17
18#define UNIX_HASH_SIZE	256
19#define UNIX_HASH_BITS	8
20
21extern unsigned int unix_tot_inflight;
22extern spinlock_t unix_table_lock;
23extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
24
25struct unix_address {
26	refcount_t	refcnt;
27	int		len;
28	unsigned int	hash;
29	struct sockaddr_un name[0];
30};
31
32struct unix_skb_parms {
33	struct pid		*pid;		/* Skb credentials	*/
34	kuid_t			uid;
35	kgid_t			gid;
36	struct scm_fp_list	*fp;		/* Passed files		*/
37#ifdef CONFIG_SECURITY_NETWORK
38	u32			secid;		/* Security ID		*/
39#endif
40	u32			consumed;
41} __randomize_layout;
42
43#define UNIXCB(skb) 	(*(struct unix_skb_parms *)&((skb)->cb))
 
44
45#define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)
46#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)
47#define unix_state_lock_nested(s) \
48				spin_lock_nested(&unix_sk(s)->lock, \
49				SINGLE_DEPTH_NESTING)
50
51/* The AF_UNIX socket */
52struct unix_sock {
53	/* WARNING: sk has to be the first member */
54	struct sock		sk;
55	struct unix_address     *addr;
56	struct path		path;
57	struct mutex		iolock, bindlock;
 
58	struct sock		*peer;
 
59	struct list_head	link;
60	atomic_long_t		inflight;
61	spinlock_t		lock;
62	unsigned long		gc_flags;
63#define UNIX_GC_CANDIDATE	0
64#define UNIX_GC_MAYBE_CYCLE	1
65	struct socket_wq	peer_wq;
66	wait_queue_entry_t		peer_wake;
67};
68
69static inline struct unix_sock *unix_sk(const struct sock *sk)
70{
71	return (struct unix_sock *)sk;
72}
73
74#define peer_wait peer_wq.wait
75
76long unix_inq_len(struct sock *sk);
77long unix_outq_len(struct sock *sk);
78
79#ifdef CONFIG_SYSCTL
80int unix_sysctl_register(struct net *net);
81void unix_sysctl_unregister(struct net *net);
82#else
83static inline int unix_sysctl_register(struct net *net) { return 0; }
84static inline void unix_sysctl_unregister(struct net *net) {}
85#endif
86#endif