1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_NET_AFUNIX_H
3 #define __LINUX_NET_AFUNIX_H
5 #include <linux/socket.h>
7 #include <linux/mutex.h>
8 #include <linux/refcount.h>
11 void unix_inflight(struct user_struct *user, struct file *fp);
12 void unix_notinflight(struct user_struct *user, struct file *fp);
13 void unix_destruct_scm(struct sk_buff *skb);
15 void wait_for_unix_gc(void);
16 struct sock *unix_get_socket(struct file *filp);
17 struct sock *unix_peer_get(struct sock *sk);
19 #define UNIX_HASH_SIZE 256
20 #define UNIX_HASH_BITS 8
22 extern unsigned int unix_tot_inflight;
23 extern spinlock_t unix_table_lock;
24 extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
30 struct sockaddr_un name[0];
33 struct unix_skb_parms {
34 struct pid *pid; /* Skb credentials */
37 struct scm_fp_list *fp; /* Passed files */
38 #ifdef CONFIG_SECURITY_NETWORK
39 u32 secid; /* Security ID */
44 #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
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, \
52 /* The AF_UNIX socket */
54 /* WARNING: sk has to be the first member */
56 struct unix_address *addr;
58 struct mutex iolock, bindlock;
60 struct list_head link;
61 atomic_long_t inflight;
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;
70 static inline struct unix_sock *unix_sk(const struct sock *sk)
72 return (struct unix_sock *)sk;
75 #define peer_wait peer_wq.wait
77 long unix_inq_len(struct sock *sk);
78 long unix_outq_len(struct sock *sk);
81 int unix_sysctl_register(struct net *net);
82 void unix_sysctl_unregister(struct net *net);
84 static inline int unix_sysctl_register(struct net *net) { return 0; }
85 static inline void unix_sysctl_unregister(struct net *net) {}