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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 _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 */
38 typedef unsigned long autofs_wqt_t;
39 #else
40 typedef 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
47 struct autofs_packet_hdr {
48 int proto_version; /* Protocol version */
49 int type; /* Type of packet */
50 };
51
52 struct 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) */
60 struct 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 */