--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/auto_fs.h	Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,84 @@
+/* -*- linux-c -*- ------------------------------------------------------- *
+ *   
+ * linux/include/linux/auto_fs.h
+ *
+ *   Copyright 1997 Transmeta Corporation - All Rights Reserved
+ *
+ * This file is part of the Linux kernel and is made available under
+ * the terms of the GNU General Public License, version 2, or at your
+ * option, any later version, incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+
+#ifndef _LINUX_AUTO_FS_H
+#define _LINUX_AUTO_FS_H
+
+#ifdef __KERNEL__
+#include <linux/fs.h>
+#include <linux/limits.h>
+#include <asm/types.h>
+#endif /* __KERNEL__ */
+
+#include <linux/ioctl.h>
+
+/* This file describes autofs v3 */
+#define AUTOFS_PROTO_VERSION	3
+
+/* Range of protocol versions defined */
+#define AUTOFS_MAX_PROTO_VERSION	AUTOFS_PROTO_VERSION
+#define AUTOFS_MIN_PROTO_VERSION	AUTOFS_PROTO_VERSION
+
+/*
+ * Architectures where both 32- and 64-bit binaries can be executed
+ * on 64-bit kernels need this.  This keeps the structure format
+ * uniform, and makes sure the wait_queue_token isn't too big to be
+ * passed back down to the kernel.
+ *
+ * This assumes that on these architectures:
+ * mode     32 bit    64 bit
+ * -------------------------
+ * int      32 bit    32 bit
+ * long     32 bit    64 bit
+ *
+ * If so, 32-bit user-space code should be backwards compatible.
+ */
+
+#if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \
+ || defined(__powerpc__) || defined(__s390__)
+typedef unsigned int autofs_wqt_t;
+#else
+typedef unsigned long autofs_wqt_t;
+#endif
+
+/* Packet types */
+#define autofs_ptype_missing	0	/* Missing entry (mount request) */
+#define autofs_ptype_expire	1	/* Expire entry (umount request) */
+
+struct autofs_packet_hdr {
+	int proto_version;		/* Protocol version */
+	int type;			/* Type of packet */
+};
+
+struct autofs_packet_missing {
+	struct autofs_packet_hdr hdr;
+        autofs_wqt_t wait_queue_token;
+	int len;
+	char name[NAME_MAX+1];
+};	
+
+/* v3 expire (via ioctl) */
+struct autofs_packet_expire {
+	struct autofs_packet_hdr hdr;
+	int len;
+	char name[NAME_MAX+1];
+};
+
+#define AUTOFS_IOC_READY      _IO(0x93,0x60)
+#define AUTOFS_IOC_FAIL       _IO(0x93,0x61)
+#define AUTOFS_IOC_CATATONIC  _IO(0x93,0x62)
+#define AUTOFS_IOC_PROTOVER   _IOR(0x93,0x63,int)
+#define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
+#define AUTOFS_IOC_EXPIRE     _IOR(0x93,0x65,struct autofs_packet_expire)
+
+#endif /* _LINUX_AUTO_FS_H */