1/* -*- linux-c -*- ------------------------------------------------------- *
2 *
3 * linux/include/linux/auto_fs.h
4 *
5 *   Copyright 1997 Transmeta Corporation - All Rights Reserved
6 *
7 * This file is part of the Linux kernel and is made available under
8 * the terms of the GNU General Public License, version 2, or at your
9 * option, any later version, incorporated herein by reference.
10 *
11 * ----------------------------------------------------------------------- */
12
13
14#ifndef _UAPI_LINUX_AUTO_FS_H
15#define _UAPI_LINUX_AUTO_FS_H
16
17#include <linux/types.h>
18#ifndef __KERNEL__
19#include <sys/ioctl.h>
20#endif /* __KERNEL__ */
21
22
23/* This file describes autofs v3 */
24#define AUTOFS_PROTO_VERSION	3
25
26/* Range of protocol versions defined */
27#define AUTOFS_MAX_PROTO_VERSION	AUTOFS_PROTO_VERSION
28#define AUTOFS_MIN_PROTO_VERSION	AUTOFS_PROTO_VERSION
29
30/*
31 * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
32 * back to the kernel via ioctl from userspace. On architectures where 32- and
33 * 64-bit userspace binaries can be executed it's important that the size of
34 * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we
35 * do not break the binary ABI interface by changing the structure size.
36 */
37#if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
38typedef unsigned long autofs_wqt_t;
39#else
40typedef unsigned int autofs_wqt_t;
41#endif
42
43/* Packet types */
44#define autofs_ptype_missing	0	/* Missing entry (mount request) */
45#define autofs_ptype_expire	1	/* Expire entry (umount request) */
46
47struct autofs_packet_hdr {
48	int proto_version;		/* Protocol version */
49	int type;			/* Type of packet */
50};
51
52struct autofs_packet_missing {
53	struct autofs_packet_hdr hdr;
54        autofs_wqt_t wait_queue_token;
55	int len;
56	char name[NAME_MAX+1];
57};
58
59/* v3 expire (via ioctl) */
60struct autofs_packet_expire {
61	struct autofs_packet_hdr hdr;
62	int len;
63	char name[NAME_MAX+1];
64};
65
66#define AUTOFS_IOC_READY      _IO(0x93,0x60)
67#define AUTOFS_IOC_FAIL       _IO(0x93,0x61)
68#define AUTOFS_IOC_CATATONIC  _IO(0x93,0x62)
69#define AUTOFS_IOC_PROTOVER   _IOR(0x93,0x63,int)
70#define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,compat_ulong_t)
71#define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
72#define AUTOFS_IOC_EXPIRE     _IOR(0x93,0x65,struct autofs_packet_expire)
73
74#endif /* _UAPI_LINUX_AUTO_FS_H */
75