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>
18 #include <sys/ioctl.h>
21 /* This file describes autofs v3 */
22 #define AUTOFS_PROTO_VERSION 3
24 /* Range of protocol versions defined */
25 #define AUTOFS_MAX_PROTO_VERSION AUTOFS_PROTO_VERSION
26 #define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
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.
35 #if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
36 typedef unsigned long autofs_wqt_t;
38 typedef unsigned int autofs_wqt_t;
42 #define autofs_ptype_missing 0 /* Missing entry (mount request) */
43 #define autofs_ptype_expire 1 /* Expire entry (umount request) */
45 struct autofs_packet_hdr {
46 int proto_version; /* Protocol version */
47 int type; /* Type of packet */
50 struct autofs_packet_missing {
51 struct autofs_packet_hdr hdr;
52 autofs_wqt_t wait_queue_token;
54 char name[NAME_MAX+1];
57 /* v3 expire (via ioctl) */
58 struct autofs_packet_expire {
59 struct autofs_packet_hdr hdr;
61 char name[NAME_MAX+1];
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)
72 #endif /* _LINUX_AUTO_FS_H */