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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* -*- 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
Jaswinder Singh Rajput52bb25a2009-06-01 06:21:13 +000017#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#ifdef __KERNEL__
19#include <linux/fs.h>
20#include <linux/limits.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/ioctl.h>
Ian Kent79955892009-03-31 15:24:45 -070022#else
Ian Kent79955892009-03-31 15:24:45 -070023#include <sys/ioctl.h>
24#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26/* This file describes autofs v3 */
27#define AUTOFS_PROTO_VERSION 3
28
29/* Range of protocol versions defined */
30#define AUTOFS_MAX_PROTO_VERSION AUTOFS_PROTO_VERSION
31#define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
32
33/*
34 * Architectures where both 32- and 64-bit binaries can be executed
35 * on 64-bit kernels need this. This keeps the structure format
36 * uniform, and makes sure the wait_queue_token isn't too big to be
37 * passed back down to the kernel.
38 *
39 * This assumes that on these architectures:
40 * mode 32 bit 64 bit
41 * -------------------------
42 * int 32 bit 32 bit
43 * long 32 bit 64 bit
44 *
45 * If so, 32-bit user-space code should be backwards compatible.
46 */
47
48#if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \
49 || defined(__powerpc__) || defined(__s390__)
50typedef unsigned int autofs_wqt_t;
51#else
52typedef unsigned long autofs_wqt_t;
53#endif
54
55/* Packet types */
56#define autofs_ptype_missing 0 /* Missing entry (mount request) */
57#define autofs_ptype_expire 1 /* Expire entry (umount request) */
58
59struct autofs_packet_hdr {
60 int proto_version; /* Protocol version */
61 int type; /* Type of packet */
62};
63
64struct autofs_packet_missing {
65 struct autofs_packet_hdr hdr;
66 autofs_wqt_t wait_queue_token;
67 int len;
68 char name[NAME_MAX+1];
69};
70
71/* v3 expire (via ioctl) */
72struct autofs_packet_expire {
73 struct autofs_packet_hdr hdr;
74 int len;
75 char name[NAME_MAX+1];
76};
77
78#define AUTOFS_IOC_READY _IO(0x93,0x60)
79#define AUTOFS_IOC_FAIL _IO(0x93,0x61)
80#define AUTOFS_IOC_CATATONIC _IO(0x93,0x62)
81#define AUTOFS_IOC_PROTOVER _IOR(0x93,0x63,int)
82#define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
83#define AUTOFS_IOC_EXPIRE _IOR(0x93,0x65,struct autofs_packet_expire)
84
85#endif /* _LINUX_AUTO_FS_H */