1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_NET_AFUNIX_H
3#define __LINUX_NET_AFUNIX_H
4
5#include <linux/atomic.h>
6#include <linux/mutex.h>
7#include <linux/net.h>
8#include <linux/path.h>
9#include <linux/refcount.h>
10#include <linux/spinlock.h>
11#include <linux/wait.h>
12#include <net/sock.h>
13#include <uapi/linux/un.h>
14
15#if IS_ENABLED(CONFIG_UNIX)
16struct unix_sock *unix_get_socket(struct file *filp);
17#else
18static inline struct unix_sock *unix_get_socket(struct file *filp)
19{
20 return NULL;
21}
22#endif
23
24struct unix_address {
25 refcount_t refcnt;
26 int len;
27 struct sockaddr_un name[];
28};
29
30struct scm_stat {
31 atomic_t nr_fds;
32 unsigned long nr_unix_fds;
33};
34
35/* The AF_UNIX socket */
36struct unix_sock {
37 /* WARNING: sk has to be the first member */
38 struct sock sk;
39 struct unix_address *addr;
40 struct path path;
41 struct mutex iolock, bindlock;
42 struct sock *peer;
43 struct sock *listener;
44 struct unix_vertex *vertex;
45 spinlock_t lock;
46 struct socket_wq peer_wq;
47#define peer_wait peer_wq.wait
48 wait_queue_entry_t peer_wake;
49 struct scm_stat scm_stat;
50 int inq_len;
51 bool recvmsg_inq;
52#if IS_ENABLED(CONFIG_AF_UNIX_OOB)
53 struct sk_buff *oob_skb;
54#endif
55};
56
57#define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk)
58#define unix_peer(sk) (unix_sk(sk)->peer)
59
60#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
61#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
62
63#endif
64