include/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 _LINUX_AUTO_FS_H
  15 #define _LINUX_AUTO_FS_H
  16
  17 #include <linux/types.h>
  18 #ifdef __KERNEL__
  19 #include <linux/fs.h>
  20 #include <linux/limits.h>
  21 #include <linux/ioctl.h>
  22 #else
  23 #include <sys/ioctl.h>
  24 #endif /* __KERNEL__ */
  25
  26 /* This file describes autofs v3 */
  27 #define AUTOFS_PROTO_VERSION    3
  28
  29 /* Range of protocol versions defined */
  30 #define AUTOFS_MAX_PROTO_VERSION        AUTOFS_PROTO_VERSION
  31 #define AUTOFS_MIN_PROTO_VERSION        AUTOFS_PROTO_VERSION
  32
  33 /*
  34  * Architectures where both 32- and 64-bit binaries can be executed
  35  * on 64-bit kernels need this.  This keeps the structure format
  36  * uniform, and makes sure the wait_queue_token isn't too big to be
  37  * passed back down to the kernel.
  38  *
  39  * This assumes that on these architectures:
  40  * mode     32 bit    64 bit
  41  * -------------------------
  42  * int      32 bit    32 bit
  43  * long     32 bit    64 bit
  44  *
  45  * If so, 32-bit user-space code should be backwards compatible.
  46  */
  47
  48 #if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \
  49  || defined(__powerpc__) || defined(__s390__)
  50 typedef unsigned int autofs_wqt_t;
  51 #else
  52 typedef unsigned long autofs_wqt_t;
  53 #endif
  54
  55 /* Packet types */
  56 #define autofs_ptype_missing    0       /* Missing entry (mount request) */
  57 #define autofs_ptype_expire     1       /* Expire entry (umount request) */
  58
  59 struct autofs_packet_hdr {
  60         int proto_version;              /* Protocol version */
  61         int type;                       /* Type of packet */
  62 };
  63
  64 struct autofs_packet_missing {
  65         struct autofs_packet_hdr hdr;
  66         autofs_wqt_t wait_queue_token;
  67         int len;
  68         char name[NAME_MAX+1];
  69 };
  70
  71 /* v3 expire (via ioctl) */
  72 struct autofs_packet_expire {
  73         struct autofs_packet_hdr hdr;
  74         int len;
  75         char name[NAME_MAX+1];
  76 };
  77
  78 #define AUTOFS_IOC_READY      _IO(0x93,0x60)
  79 #define AUTOFS_IOC_FAIL       _IO(0x93,0x61)
  80 #define AUTOFS_IOC_CATATONIC  _IO(0x93,0x62)
  81 #define AUTOFS_IOC_PROTOVER   _IOR(0x93,0x63,int)
  82 #define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)
  83 #define AUTOFS_IOC_EXPIRE     _IOR(0x93,0x65,struct autofs_packet_expire)
  84
  85 #endif /* _LINUX_AUTO_FS_H */