/* SPDX-License-Identifier: GPL-2.0 */#ifndef __LINUX_NET_AFUNIX_H#define __LINUX_NET_AFUNIX_H #include <linux/atomic.h>#include <linux/mutex.h>#include <linux/net.h>#include <linux/path.h>#include <linux/refcount.h>#include <linux/spinlock.h>#include <linux/wait.h>#include <net/sock.h>#include <uapi/linux/un.h> #if IS_ENABLED(CONFIG_UNIX)struct unix_sock *unix_get_socket(struct file *filp);#elsestatic inline struct unix_sock *unix_get_socket(struct file *filp){	return NULL;}#endif struct unix_address {	refcount_t	refcnt;	int		len;	struct sockaddr_un name[];}; struct scm_stat {	atomic_t nr_fds;	unsigned long nr_unix_fds;}; /* The AF_UNIX socket */struct unix_sock {	/* WARNING: sk has to be the first member */	struct sock		sk;	struct unix_address	*addr;	struct path		path;	struct mutex		iolock, bindlock;	struct sock		*peer;	struct sock		*listener;	struct unix_vertex	*vertex;	spinlock_t		lock;	struct socket_wq	peer_wq;#define peer_wait		peer_wq.wait	wait_queue_entry_t	peer_wake;	struct scm_stat		scm_stat;	int			inq_len;	bool			recvmsg_inq;	bool			scm_rights_notrunc;#if IS_ENABLED(CONFIG_AF_UNIX_OOB)	struct sk_buff		*oob_skb;#endif}; #define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk)#define unix_peer(sk) (unix_sk(sk)->peer) #define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock) #endif