include/uapi/linux/auto_fs.h

   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  * Architectures where both 32- and 64-bit binaries can be executed
  32  * on 64-bit kernels need this.  This keeps the structure format
  33  * uniform, and makes sure the wait_queue_token isn't too big to be
  34  * passed back down to the kernel.
  35  *
  36  * This assumes that on these architectures:
  37  * mode     32 bit    64 bit
  38  * -------------------------
  39  * int      32 bit    32 bit
  40  * long     32 bit    64 bit
  41  *
  42  * If so, 32-bit user-space code should be backwards compatible.
  43  */
  44
  45 #if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \
  46  || defined(__powerpc__) || defined(__s390__)
  47 typedef unsigned int autofs_wqt_t;
  48 #else
  49 typedef unsigned long autofs_wqt_t;
  50 #endif
  51
  52 /* Packet types */
  53 #define autofs_ptype_missing    0       /* Missing entry (mount request) */
  54 #define autofs_ptype_expire     1       /* Expire entry (umount request) */
  55
  56 struct autofs_packet_hdr {
  57         int proto_version;              /* Protocol version */
  58         int type;                       /* Type of packet */
  59 };
  60
  61 struct autofs_packet_missing {
  62         struct autofs_packet_hdr hdr;
  63         autofs_wqt_t wait_queue_token;
  64         int len;
  65         char name[NAME_MAX+1];
  66 };
  67
  68 /* v3 expire (via ioctl) */
  69 struct autofs_packet_expire {
  70         struct autofs_packet_hdr hdr;
  71         int len;
  72         char name[NAME_MAX+1];
  73 };
  74
  75 #define AUTOFS_IOC_READY      _IO(0x93,0x60)
  76 #define AUTOFS_IOC_FAIL       _IO(0x93,0x61)
  77 #define AUTOFS_IOC_CATATONIC  _IO(0x93,0x62)
  78 #define AUTOFS_IOC_PROTOVER   _IOR(0x93,0x63,int)
  79 #define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,compat_ulong_t)
  80 #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
  81 #define AUTOFS_IOC_EXPIRE     _IOR(0x93,0x65,struct autofs_packet_expire)
  82
  83 #endif /* _UAPI_LINUX_AUTO_FS_H */