Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2/*
3 * Copyright 1997 Transmeta Corporation - All Rights Reserved
4 *
5 * This file is part of the Linux kernel and is made available under
6 * the terms of the GNU General Public License, version 2, or at your
7 * option, any later version, incorporated herein by reference.
8 *
9 * ----------------------------------------------------------------------- */
10
11
12#ifndef _UAPI_LINUX_AUTO_FS_H
13#define _UAPI_LINUX_AUTO_FS_H
14
15#include <linux/types.h>
16#include <linux/limits.h>
17#ifndef __KERNEL__
18#include <sys/ioctl.h>
19#endif /* __KERNEL__ */
20
21
22/* This file describes autofs v3 */
23#define AUTOFS_PROTO_VERSION 3
24
25/* Range of protocol versions defined */
26#define AUTOFS_MAX_PROTO_VERSION AUTOFS_PROTO_VERSION
27#define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
28
29/*
30 * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
31 * back to the kernel via ioctl from userspace. On architectures where 32- and
32 * 64-bit userspace binaries can be executed it's important that the size of
33 * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we
34 * do not break the binary ABI interface by changing the structure size.
35 */
36#if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
37typedef unsigned long autofs_wqt_t;
38#else
39typedef unsigned int autofs_wqt_t;
40#endif
41
42/* Packet types */
43#define autofs_ptype_missing 0 /* Missing entry (mount request) */
44#define autofs_ptype_expire 1 /* Expire entry (umount request) */
45
46struct autofs_packet_hdr {
47 int proto_version; /* Protocol version */
48 int type; /* Type of packet */
49};
50
51struct autofs_packet_missing {
52 struct autofs_packet_hdr hdr;
53 autofs_wqt_t wait_queue_token;
54 int len;
55 char name[NAME_MAX+1];
56};
57
58/* v3 expire (via ioctl) */
59struct autofs_packet_expire {
60 struct autofs_packet_hdr hdr;
61 int len;
62 char name[NAME_MAX+1];
63};
64
65#define AUTOFS_IOCTL 0x93
66
67enum {
68 AUTOFS_IOC_READY_CMD = 0x60,
69 AUTOFS_IOC_FAIL_CMD,
70 AUTOFS_IOC_CATATONIC_CMD,
71 AUTOFS_IOC_PROTOVER_CMD,
72 AUTOFS_IOC_SETTIMEOUT_CMD,
73 AUTOFS_IOC_EXPIRE_CMD,
74};
75
76#define AUTOFS_IOC_READY _IO(AUTOFS_IOCTL, AUTOFS_IOC_READY_CMD)
77#define AUTOFS_IOC_FAIL _IO(AUTOFS_IOCTL, AUTOFS_IOC_FAIL_CMD)
78#define AUTOFS_IOC_CATATONIC _IO(AUTOFS_IOCTL, AUTOFS_IOC_CATATONIC_CMD)
79#define AUTOFS_IOC_PROTOVER _IOR(AUTOFS_IOCTL, AUTOFS_IOC_PROTOVER_CMD, int)
80#define AUTOFS_IOC_SETTIMEOUT32 _IOWR(AUTOFS_IOCTL, AUTOFS_IOC_SETTIMEOUT_CMD, compat_ulong_t)
81#define AUTOFS_IOC_SETTIMEOUT _IOWR(AUTOFS_IOCTL, AUTOFS_IOC_SETTIMEOUT_CMD, unsigned long)
82#define AUTOFS_IOC_EXPIRE _IOR(AUTOFS_IOCTL, AUTOFS_IOC_EXPIRE_CMD, struct autofs_packet_expire)
83
84#endif /* _UAPI_LINUX_AUTO_FS_H */