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