include/uapi/linux/auto_fs.h

   1 /*
   2  *   Copyright 1997 Transmeta Corporation - All Rights Reserved
   3  *
   4  * This file is part of the Linux kernel and is made available under
   5  * the terms of the GNU General Public License, version 2, or at your
   6  * option, any later version, incorporated herein by reference.
   7  *
   8  * ----------------------------------------------------------------------- */
   9
  10
  11 #ifndef _UAPI_LINUX_AUTO_FS_H
  12 #define _UAPI_LINUX_AUTO_FS_H
  13
  14 #include <linux/types.h>
  15 #ifndef __KERNEL__
  16 #include <sys/ioctl.h>
  17 #endif /* __KERNEL__ */
  18
  19
  20 /* This file describes autofs v3 */
  21 #define AUTOFS_PROTO_VERSION    3
  22
  23 /* Range of protocol versions defined */
  24 #define AUTOFS_MAX_PROTO_VERSION        AUTOFS_PROTO_VERSION
  25 #define AUTOFS_MIN_PROTO_VERSION        AUTOFS_PROTO_VERSION
  26
  27 /*
  28  * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
  29  * back to the kernel via ioctl from userspace. On architectures where 32- and
  30  * 64-bit userspace binaries can be executed it's important that the size of
  31  * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we
  32  * do not break the binary ABI interface by changing the structure size.
  33  */
  34 #if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
  35 typedef unsigned long autofs_wqt_t;
  36 #else
  37 typedef unsigned int autofs_wqt_t;
  38 #endif
  39
  40 /* Packet types */
  41 #define autofs_ptype_missing    0       /* Missing entry (mount request) */
  42 #define autofs_ptype_expire     1       /* Expire entry (umount request) */
  43
  44 struct autofs_packet_hdr {
  45         int proto_version;              /* Protocol version */
  46         int type;                       /* Type of packet */
  47 };
  48
  49 struct autofs_packet_missing {
  50         struct autofs_packet_hdr hdr;
  51         autofs_wqt_t wait_queue_token;
  52         int len;
  53         char name[NAME_MAX+1];
  54 };
  55
  56 /* v3 expire (via ioctl) */
  57 struct autofs_packet_expire {
  58         struct autofs_packet_hdr hdr;
  59         int len;
  60         char name[NAME_MAX+1];
  61 };
  62
  63 #define AUTOFS_IOC_READY      _IO(0x93, 0x60)
  64 #define AUTOFS_IOC_FAIL       _IO(0x93, 0x61)
  65 #define AUTOFS_IOC_CATATONIC  _IO(0x93, 0x62)
  66 #define AUTOFS_IOC_PROTOVER   _IOR(0x93, 0x63, int)
  67 #define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93, 0x64, compat_ulong_t)
  68 #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93, 0x64, unsigned long)
  69 #define AUTOFS_IOC_EXPIRE     _IOR(0x93, 0x65, struct autofs_packet_expire)
  70
  71 #endif /* _UAPI_LINUX_AUTO_FS_H */