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_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[];
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
44struct scm_stat {
45	atomic_t nr_fds;
46};
47
48#define UNIXCB(skb)	(*(struct unix_skb_parms *)&((skb)->cb))
 
49
50#define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)
51#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)
52#define unix_state_lock_nested(s) \
53				spin_lock_nested(&unix_sk(s)->lock, \
54				SINGLE_DEPTH_NESTING)
55
56/* The AF_UNIX socket */
57struct unix_sock {
58	/* WARNING: sk has to be the first member */
59	struct sock		sk;
60	struct unix_address	*addr;
61	struct path		path;
62	struct mutex		iolock, bindlock;
 
63	struct sock		*peer;
 
64	struct list_head	link;
65	atomic_long_t		inflight;
66	spinlock_t		lock;
67	unsigned long		gc_flags;
68#define UNIX_GC_CANDIDATE	0
69#define UNIX_GC_MAYBE_CYCLE	1
70	struct socket_wq	peer_wq;
71	wait_queue_entry_t	peer_wake;
72	struct scm_stat		scm_stat;
73};
74
75static inline struct unix_sock *unix_sk(const struct sock *sk)
76{
77	return (struct unix_sock *)sk;
78}
79
80#define peer_wait peer_wq.wait
81
82long unix_inq_len(struct sock *sk);
83long unix_outq_len(struct sock *sk);
84
85#ifdef CONFIG_SYSCTL
86int unix_sysctl_register(struct net *net);
87void unix_sysctl_unregister(struct net *net);
88#else
89static inline int unix_sysctl_register(struct net *net) { return 0; }
90static inline void unix_sysctl_unregister(struct net *net) {}
91#endif
92#endif