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_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