Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 87 insertions, 0 deletions

diff --git a/include/net/af_unix.h b/include/net/af_unix.h
new file mode 100644
index 000000000..7ec1cdb66
--- /dev/null
+++ b/include/net/af_unix.h
@@ -0,0 +1,87 @@
+/* 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/mutex.h>
+#include <linux/refcount.h>
+#include <net/sock.h>
+
+void unix_inflight(struct user_struct *user, struct file *fp);
+void unix_notinflight(struct user_struct *user, struct file *fp);
+void unix_destruct_scm(struct sk_buff *skb);
+void unix_gc(void);
+void wait_for_unix_gc(void);
+struct sock *unix_get_socket(struct file *filp);
+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];
+
+struct unix_address {
+	refcount_t	refcnt;
+	int		len;
+	unsigned int	hash;
+	struct sockaddr_un name[0];
+};
+
+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
+	u32			consumed;
+} __randomize_layout;
+
+#define UNIXCB(skb) 	(*(struct unix_skb_parms *)&((skb)->cb))
+
+#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 path		path;
+	struct mutex		iolock, bindlock;
+	struct sock		*peer;
+	struct list_head	link;
+	atomic_long_t		inflight;
+	spinlock_t		lock;
+	unsigned long		gc_flags;
+#define UNIX_GC_CANDIDATE	0
+#define UNIX_GC_MAYBE_CYCLE	1
+	struct socket_wq	peer_wq;
+	wait_queue_entry_t		peer_wake;
+};
+
+static inline struct unix_sock *unix_sk(const struct sock *sk)
+{
+	return (struct unix_sock *)sk;
+}
+
+#define peer_wait peer_wq.wait
+
+long unix_inq_len(struct sock *sk);
+long unix_outq_len(struct sock *sk);
+
+#ifdef CONFIG_SYSCTL
+int unix_sysctl_register(struct net *net);
+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