1 /* -*- linux-c -*- ------------------------------------------------------- *
3 * linux/include/linux/auto_fs.h
5 * Copyright 1997 Transmeta Corporation - All Rights Reserved
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.
11 * ----------------------------------------------------------------------- */
14 #ifndef _LINUX_AUTO_FS_H
15 #define _LINUX_AUTO_FS_H
17 #include <linux/types.h>
20 #include <linux/limits.h>
21 #include <linux/ioctl.h>
23 #include <sys/ioctl.h>
24 #endif /* __KERNEL__ */
26 /* This file describes autofs v3 */
27 #define AUTOFS_PROTO_VERSION 3
29 /* Range of protocol versions defined */
30 #define AUTOFS_MAX_PROTO_VERSION AUTOFS_PROTO_VERSION
31 #define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
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.
40 #if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
41 typedef unsigned long autofs_wqt_t;
43 typedef unsigned int autofs_wqt_t;
47 #define autofs_ptype_missing 0 /* Missing entry (mount request) */
48 #define autofs_ptype_expire 1 /* Expire entry (umount request) */
50 struct autofs_packet_hdr {
51 int proto_version; /* Protocol version */
52 int type; /* Type of packet */
55 struct autofs_packet_missing {
56 struct autofs_packet_hdr hdr;
57 autofs_wqt_t wait_queue_token;
59 char name[NAME_MAX+1];
62 /* v3 expire (via ioctl) */
63 struct autofs_packet_expire {
64 struct autofs_packet_hdr hdr;
66 char name[NAME_MAX+1];
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)
77 #endif /* _LINUX_AUTO_FS_H */