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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 _LINUX_AUTO_FS_H
15#define _LINUX_AUTO_FS_H
16
17#ifdef __KERNEL__
18#include <linux/fs.h>
19#include <linux/limits.h>
20#include <asm/types.h>
21#endif /* __KERNEL__ */
22
23#include <linux/ioctl.h>
24
25/* This file describes autofs v3 */
26#define AUTOFS_PROTO_VERSION 3
27
28/* Range of protocol versions defined */
29#define AUTOFS_MAX_PROTO_VERSION AUTOFS_PROTO_VERSION
30#define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
31
32/*
33 * Architectures where both 32- and 64-bit binaries can be executed
34 * on 64-bit kernels need this. This keeps the structure format
35 * uniform, and makes sure the wait_queue_token isn't too big to be
36 * passed back down to the kernel.
37 *
38 * This assumes that on these architectures:
39 * mode 32 bit 64 bit
40 * -------------------------
41 * int 32 bit 32 bit
42 * long 32 bit 64 bit
43 *
44 * If so, 32-bit user-space code should be backwards compatible.
45 */
46
47#if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \
48 || defined(__powerpc__) || defined(__s390__)
49typedef unsigned int autofs_wqt_t;
50#else
51typedef unsigned long autofs_wqt_t;
52#endif
53
54/* Packet types */
55#define autofs_ptype_missing 0 /* Missing entry (mount request) */
56#define autofs_ptype_expire 1 /* Expire entry (umount request) */
57
58struct autofs_packet_hdr {
59 int proto_version; /* Protocol version */
60 int type; /* Type of packet */
61};
62
63struct autofs_packet_missing {
64 struct autofs_packet_hdr hdr;
65 autofs_wqt_t wait_queue_token;
66 int len;
67 char name[NAME_MAX+1];
68};
69
70/* v3 expire (via ioctl) */
71struct autofs_packet_expire {
72 struct autofs_packet_hdr hdr;
73 int len;
74 char name[NAME_MAX+1];
75};
76
77#define AUTOFS_IOC_READY _IO(0x93,0x60)
78#define AUTOFS_IOC_FAIL _IO(0x93,0x61)
79#define AUTOFS_IOC_CATATONIC _IO(0x93,0x62)
80#define AUTOFS_IOC_PROTOVER _IOR(0x93,0x63,int)
81#define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
82#define AUTOFS_IOC_EXPIRE _IOR(0x93,0x65,struct autofs_packet_expire)
83
84#endif /* _LINUX_AUTO_FS_H */