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