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