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/* 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