/* -*- linux-c -*- ------------------------------------------------------- *
   *   
   * linux/include/linux/auto_fs.h
   *
   *   Copyright 1997 Transmeta Corporation - All Rights Reserved
   *
   * This file is part of the Linux kernel and is made available under
   * the terms of the GNU General Public License, version 2, or at your
   * option, any later version, incorporated herein by reference.
   *
   * ----------------------------------------------------------------------- */
  
  
  #ifndef _LINUX_AUTO_FS_H
  #define _LINUX_AUTO_FS_H

  #include <linux/types.h>

  #ifdef __KERNEL__
  #include <linux/fs.h>
  #include <linux/limits.h>

  #include <linux/ioctl.h>
  #else

  #include <sys/ioctl.h>

  #endif /* __KERNEL__ */

  /* This file describes autofs v3 */
  #define AUTOFS_PROTO_VERSION	3
  
  /* Range of protocol versions defined */
  #define AUTOFS_MAX_PROTO_VERSION	AUTOFS_PROTO_VERSION
  #define AUTOFS_MIN_PROTO_VERSION	AUTOFS_PROTO_VERSION
  
  /*
   * Architectures where both 32- and 64-bit binaries can be executed
   * on 64-bit kernels need this.  This keeps the structure format
   * uniform, and makes sure the wait_queue_token isn't too big to be
   * passed back down to the kernel.
   *
   * This assumes that on these architectures:
   * mode     32 bit    64 bit
   * -------------------------
   * int      32 bit    32 bit
   * long     32 bit    64 bit
   *
   * If so, 32-bit user-space code should be backwards compatible.
   */
  
  #if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \
   || defined(__powerpc__) || defined(__s390__)
  typedef unsigned int autofs_wqt_t;
  #else
  typedef unsigned long autofs_wqt_t;
  #endif
  
  /* Packet types */
  #define autofs_ptype_missing	0	/* Missing entry (mount request) */
  #define autofs_ptype_expire	1	/* Expire entry (umount request) */
  
  struct autofs_packet_hdr {
  	int proto_version;		/* Protocol version */
  	int type;			/* Type of packet */
  };
  
  struct autofs_packet_missing {
  	struct autofs_packet_hdr hdr;
          autofs_wqt_t wait_queue_token;
  	int len;
  	char name[NAME_MAX+1];
  };	
  
  /* v3 expire (via ioctl) */
  struct autofs_packet_expire {
  	struct autofs_packet_hdr hdr;
  	int len;
  	char name[NAME_MAX+1];
  };
  
  #define AUTOFS_IOC_READY      _IO(0x93,0x60)
  #define AUTOFS_IOC_FAIL       _IO(0x93,0x61)
  #define AUTOFS_IOC_CATATONIC  _IO(0x93,0x62)
  #define AUTOFS_IOC_PROTOVER   _IOR(0x93,0x63,int)

  #define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,compat_ulong_t)

  #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
  #define AUTOFS_IOC_EXPIRE     _IOR(0x93,0x65,struct autofs_packet_expire)
  
  #endif /* _LINUX_AUTO_FS_H */