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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/include/net/af_unix.h
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#ifndef __LINUX_NET_AFUNIX_H

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#define __LINUX_NET_AFUNIX_H

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#include <linux/socket.h>

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#include <linux/un.h>

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#include <linux/mutex.h>

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#include <net/sock.h>

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extern void unix_inflight(struct file *fp);

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extern void unix_notinflight(struct file *fp);

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extern void unix_gc(void);

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extern void wait_for_unix_gc(void);

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extern struct sock *unix_get_socket(struct file *filp);

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#define UNIX_HASH_SIZE	256

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extern unsigned int unix_tot_inflight;

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struct unix_address {

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	atomic_t	refcnt;

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	int		len;

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	unsigned	hash;

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	struct sockaddr_un name[0];

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};

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struct unix_skb_parms {

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	struct pid		*pid;		/* Skb credentials	*/

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	const struct cred	*cred;

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	struct scm_fp_list	*fp;		/* Passed files		*/

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#ifdef CONFIG_SECURITY_NETWORK

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	u32			secid;		/* Security ID		*/

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#endif

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};

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#define UNIXCB(skb) 	(*(struct unix_skb_parms *)&((skb)->cb))

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#define UNIXSID(skb)	(&UNIXCB((skb)).secid)

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#define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)

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#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)

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#define unix_state_lock_nested(s) \

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				spin_lock_nested(&unix_sk(s)->lock, \

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				SINGLE_DEPTH_NESTING)

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/* The AF_UNIX socket */

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struct unix_sock {

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	/* WARNING: sk has to be the first member */

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	struct sock		sk;

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	struct unix_address     *addr;

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	struct dentry		*dentry;

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	struct vfsmount		*mnt;

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	struct mutex		readlock;

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	struct sock		*peer;

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	struct sock		*other;

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	struct list_head	link;

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	atomic_long_t		inflight;

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	spinlock_t		lock;

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	unsigned int		gc_candidate : 1;

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	unsigned int		gc_maybe_cycle : 1;

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	unsigned char		recursion_level;

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	struct socket_wq	peer_wq;

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};

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#define unix_sk(__sk) ((struct unix_sock *)__sk)

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#define peer_wait peer_wq.wait

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#ifdef CONFIG_SYSCTL

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extern int unix_sysctl_register(struct net *net);

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extern void unix_sysctl_unregister(struct net *net);

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#else

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static inline int unix_sysctl_register(struct net *net) { return 0; }

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static inline void unix_sysctl_unregister(struct net *net) {}

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#endif

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#endif

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