LXR linux/include/uapi/linux/auto

   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 */
  38typedef unsigned long autofs_wqt_t;
  39#else
  40typedef 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
  47struct autofs_packet_hdr {
  48        int proto_version;              /* Protocol version */
  49        int type;                       /* Type of packet */
  50};
  51
  52struct 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) */
  60struct 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 */
  75