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 #include <linux/types.h>
18 #ifdef __KERNEL__
19 #include <linux/fs.h>
20 #include <linux/limits.h>
21 #include <linux/ioctl.h>
22 #else
23 #include <sys/ioctl.h>
24 #endif /* __KERNEL__ */
25 
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  * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
35  * back to the kernel via ioctl from userspace. On architectures where 32- and
36  * 64-bit userspace binaries can be executed it's important that the size of
37  * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we
38  * do not break the binary ABI interface by changing the structure size.
39  */
40 #if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
41 typedef unsigned long autofs_wqt_t;
42 #else
43 typedef unsigned int autofs_wqt_t;
44 #endif
45 
46 /* Packet types */
47 #define autofs_ptype_missing	0	/* Missing entry (mount request) */
48 #define autofs_ptype_expire	1	/* Expire entry (umount request) */
49 
50 struct autofs_packet_hdr {
51 	int proto_version;		/* Protocol version */
52 	int type;			/* Type of packet */
53 };
54 
55 struct autofs_packet_missing {
56 	struct autofs_packet_hdr hdr;
57         autofs_wqt_t wait_queue_token;
58 	int len;
59 	char name[NAME_MAX+1];
60 };
61 
62 /* v3 expire (via ioctl) */
63 struct autofs_packet_expire {
64 	struct autofs_packet_hdr hdr;
65 	int len;
66 	char name[NAME_MAX+1];
67 };
68 
69 #define AUTOFS_IOC_READY      _IO(0x93,0x60)
70 #define AUTOFS_IOC_FAIL       _IO(0x93,0x61)
71 #define AUTOFS_IOC_CATATONIC  _IO(0x93,0x62)
72 #define AUTOFS_IOC_PROTOVER   _IOR(0x93,0x63,int)
73 #define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,compat_ulong_t)
74 #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
75 #define AUTOFS_IOC_EXPIRE     _IOR(0x93,0x65,struct autofs_packet_expire)
76 
77 #endif /* _LINUX_AUTO_FS_H */
78