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

 
 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