1 files changed, 37 insertions, 54 deletions

diff --git a/include/net/af_unix.h b/include/net/af_unix.h
index dbdfd2b0f3b3..34f53dde65ce 100644
--- a/include/net/af_unix.h
+++ b/include/net/af_unix.h
@@ -1,80 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __LINUX_NET_AFUNIX_H
 #define __LINUX_NET_AFUNIX_H
 
-#include <linux/socket.h>
-#include <linux/un.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>
 
-extern void unix_inflight(struct file *fp);
-extern void unix_notinflight(struct file *fp);
-extern void unix_gc(void);
-extern void wait_for_unix_gc(void);
-extern struct sock *unix_get_socket(struct file *filp);
-extern struct sock *unix_peer_get(struct sock *);
-
-#define UNIX_HASH_SIZE	256
-#define UNIX_HASH_BITS	8
-
-extern unsigned int unix_tot_inflight;
-extern spinlock_t unix_table_lock;
-extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
+#if IS_ENABLED(CONFIG_UNIX)
+struct unix_sock *unix_get_socket(struct file *filp);
+#else
+static inline struct unix_sock *unix_get_socket(struct file *filp)
+{
+	return NULL;
+}
+#endif
 
 struct unix_address {
-	atomic_t	refcnt;
+	refcount_t	refcnt;
 	int		len;
-	unsigned int	hash;
-	struct sockaddr_un name[0];
+	struct sockaddr_un name[];
 };
 
-struct unix_skb_parms {
-	struct pid		*pid;		/* Skb credentials	*/
-	kuid_t			uid;
-	kgid_t			gid;
-	struct scm_fp_list	*fp;		/* Passed files		*/
-#ifdef CONFIG_SECURITY_NETWORK
-	u32			secid;		/* Security ID		*/
-#endif
+struct scm_stat {
+	atomic_t nr_fds;
+	unsigned long nr_unix_fds;
 };
 
-#define UNIXCB(skb) 	(*(struct unix_skb_parms *)&((skb)->cb))
-#define UNIXSID(skb)	(&UNIXCB((skb)).secid)
-
-#define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)
-#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)
-#define unix_state_lock_nested(s) \
-				spin_lock_nested(&unix_sk(s)->lock, \
-				SINGLE_DEPTH_NESTING)
-
 /* The AF_UNIX socket */
 struct unix_sock {
 	/* WARNING: sk has to be the first member */
 	struct sock		sk;
-	struct unix_address     *addr;
+	struct unix_address	*addr;
 	struct path		path;
-	struct mutex		readlock;
+	struct mutex		iolock, bindlock;
 	struct sock		*peer;
-	struct list_head	link;
-	atomic_long_t		inflight;
+	struct sock		*listener;
+	struct unix_vertex	*vertex;
 	spinlock_t		lock;
-	unsigned char		recursion_level;
-	unsigned long		gc_flags;
-#define UNIX_GC_CANDIDATE	0
-#define UNIX_GC_MAYBE_CYCLE	1
 	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;
+#if IS_ENABLED(CONFIG_AF_UNIX_OOB)
+	struct sk_buff		*oob_skb;
+#endif
 };
-#define unix_sk(__sk) ((struct unix_sock *)__sk)
 
-#define peer_wait peer_wq.wait
+#define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk)
+#define unix_peer(sk) (unix_sk(sk)->peer)
 
-long unix_inq_len(struct sock *sk);
-long unix_outq_len(struct sock *sk);
+#define unix_state_lock(s)	spin_lock(&unix_sk(s)->lock)
+#define unix_state_unlock(s)	spin_unlock(&unix_sk(s)->lock)
 
-#ifdef CONFIG_SYSCTL
-extern int unix_sysctl_register(struct net *net);
-extern void unix_sysctl_unregister(struct net *net);
-#else
-static inline int unix_sysctl_register(struct net *net) { return 0; }
-static inline void unix_sysctl_unregister(struct net *net) {}
-#endif
 #endif