LXR linux/include/uapi/linux/auto

   1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2/*
   3 *   Copyright 1997 Transmeta Corporation - All Rights Reserved
   4 *
   5 * This file is part of the Linux kernel and is made available under
   6 * the terms of the GNU General Public License, version 2, or at your
   7 * option, any later version, incorporated herein by reference.
   8 *
   9 * ----------------------------------------------------------------------- */
  10
  11
  12#ifndef _UAPI_LINUX_AUTO_FS_H
  13#define _UAPI_LINUX_AUTO_FS_H
  14
  15#include <linux/types.h>
  16#include <linux/limits.h>
  17#ifndef __KERNEL__
  18#include <sys/ioctl.h>
  19#endif /* __KERNEL__ */
  20
  21
  22/* This file describes autofs v3 */
  23#define AUTOFS_PROTO_VERSION    3
  24
  25/* Range of protocol versions defined */
  26#define AUTOFS_MAX_PROTO_VERSION        AUTOFS_PROTO_VERSION
  27#define AUTOFS_MIN_PROTO_VERSION        AUTOFS_PROTO_VERSION
  28
  29/*
  30 * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
  31 * back to the kernel via ioctl from userspace. On architectures where 32- and
  32 * 64-bit userspace binaries can be executed it's important that the size of
  33 * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we
  34 * do not break the binary ABI interface by changing the structure size.
  35 */
  36#if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
  37typedef unsigned long autofs_wqt_t;
  38#else
  39typedef unsigned int autofs_wqt_t;
  40#endif
  41
  42/* Packet types */
  43#define autofs_ptype_missing    0       /* Missing entry (mount request) */
  44#define autofs_ptype_expire     1       /* Expire entry (umount request) */
  45
  46struct autofs_packet_hdr {
  47        int proto_version;              /* Protocol version */
  48        int type;                       /* Type of packet */
  49};
  50
  51struct autofs_packet_missing {
  52        struct autofs_packet_hdr hdr;
  53        autofs_wqt_t wait_queue_token;
  54        int len;
  55        char name[NAME_MAX+1];
  56};      
  57
  58/* v3 expire (via ioctl) */
  59struct autofs_packet_expire {
  60        struct autofs_packet_hdr hdr;
  61        int len;
  62        char name[NAME_MAX+1];
  63};
  64
  65#define AUTOFS_IOCTL 0x93
  66
  67enum {
  68        AUTOFS_IOC_READY_CMD = 0x60,
  69        AUTOFS_IOC_FAIL_CMD,
  70        AUTOFS_IOC_CATATONIC_CMD,
  71        AUTOFS_IOC_PROTOVER_CMD,
  72        AUTOFS_IOC_SETTIMEOUT_CMD,
  73        AUTOFS_IOC_EXPIRE_CMD,
  74};
  75
  76#define AUTOFS_IOC_READY        _IO(AUTOFS_IOCTL, AUTOFS_IOC_READY_CMD)
  77#define AUTOFS_IOC_FAIL         _IO(AUTOFS_IOCTL, AUTOFS_IOC_FAIL_CMD)
  78#define AUTOFS_IOC_CATATONIC    _IO(AUTOFS_IOCTL, AUTOFS_IOC_CATATONIC_CMD)
  79#define AUTOFS_IOC_PROTOVER     _IOR(AUTOFS_IOCTL, AUTOFS_IOC_PROTOVER_CMD, int)
  80#define AUTOFS_IOC_SETTIMEOUT32 _IOWR(AUTOFS_IOCTL, AUTOFS_IOC_SETTIMEOUT_CMD, compat_ulong_t)
  81#define AUTOFS_IOC_SETTIMEOUT   _IOWR(AUTOFS_IOCTL, AUTOFS_IOC_SETTIMEOUT_CMD, unsigned long)
  82#define AUTOFS_IOC_EXPIRE       _IOR(AUTOFS_IOCTL, AUTOFS_IOC_EXPIRE_CMD, struct autofs_packet_expire)
  83
  84#endif /* _UAPI_LINUX_AUTO_FS_H */
  85