include/linux/auto_fs4.h

   1 /* -*- c -*-
   2  * linux/include/linux/auto_fs4.h
   3  *
   4  * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
   5  *
   6  * This file is part of the Linux kernel and is made available under
   7  * the terms of the GNU General Public License, version 2, or at your
   8  * option, any later version, incorporated herein by reference.
   9  */
  10
  11 #ifndef _LINUX_AUTO_FS4_H
  12 #define _LINUX_AUTO_FS4_H
  13
  14 /* Include common v3 definitions */
  15 #include <linux/auto_fs.h>
  16
  17 /* autofs v4 definitions */
  18 #undef AUTOFS_PROTO_VERSION
  19 #undef AUTOFS_MIN_PROTO_VERSION
  20 #undef AUTOFS_MAX_PROTO_VERSION
  21
  22 #define AUTOFS_PROTO_VERSION            5
  23 #define AUTOFS_MIN_PROTO_VERSION        3
  24 #define AUTOFS_MAX_PROTO_VERSION        5
  25
  26 #define AUTOFS_PROTO_SUBVERSION         0
  27
  28 /* Mask for expire behaviour */
  29 #define AUTOFS_EXP_IMMEDIATE            1
  30 #define AUTOFS_EXP_LEAVES               2
  31
  32 /* Daemon notification packet types */
  33 enum autofs_notify {
  34         NFY_NONE,
  35         NFY_MOUNT,
  36         NFY_EXPIRE
  37 };
  38
  39 /* Kernel protocol version 4 packet types */
  40
  41 /* Expire entry (umount request) */
  42 #define autofs_ptype_expire_multi       2
  43
  44 /* Kernel protocol version 5 packet types */
  45
  46 /* Indirect mount missing and expire requests. */
  47 #define autofs_ptype_missing_indirect   3
  48 #define autofs_ptype_expire_indirect    4
  49
  50 /* Direct mount missing and expire requests */
  51 #define autofs_ptype_missing_direct     5
  52 #define autofs_ptype_expire_direct      6
  53
  54 /* v4 multi expire (via pipe) */
  55 struct autofs_packet_expire_multi {
  56         struct autofs_packet_hdr hdr;
  57         autofs_wqt_t wait_queue_token;
  58         int len;
  59         char name[NAME_MAX+1];
  60 };
  61
  62 /* autofs v5 common packet struct */
  63 struct autofs_v5_packet {
  64         struct autofs_packet_hdr hdr;
  65         autofs_wqt_t wait_queue_token;
  66         __u32 dev;
  67         __u64 ino;
  68         __u32 uid;
  69         __u32 gid;
  70         __u32 pid;
  71         __u32 tgid;
  72         __u32 len;
  73         char name[NAME_MAX+1];
  74 };
  75
  76 typedef struct autofs_v5_packet autofs_packet_missing_indirect_t;
  77 typedef struct autofs_v5_packet autofs_packet_expire_indirect_t;
  78 typedef struct autofs_v5_packet autofs_packet_missing_direct_t;
  79 typedef struct autofs_v5_packet autofs_packet_expire_direct_t;
  80
  81 union autofs_packet_union {
  82         struct autofs_packet_hdr hdr;
  83         struct autofs_packet_missing missing;
  84         struct autofs_packet_expire expire;
  85         struct autofs_packet_expire_multi expire_multi;
  86         struct autofs_v5_packet v5_packet;
  87 };
  88
  89 #define AUTOFS_IOC_EXPIRE_MULTI         _IOW(0x93,0x66,int)
  90 #define AUTOFS_IOC_EXPIRE_INDIRECT      AUTOFS_IOC_EXPIRE_MULTI
  91 #define AUTOFS_IOC_EXPIRE_DIRECT        AUTOFS_IOC_EXPIRE_MULTI
  92 #define AUTOFS_IOC_PROTOSUBVER          _IOR(0x93,0x67,int)
  93 #define AUTOFS_IOC_ASKREGHOST           _IOR(0x93,0x68,int)
  94 #define AUTOFS_IOC_TOGGLEREGHOST        _IOR(0x93,0x69,int)
  95 #define AUTOFS_IOC_ASKUMOUNT            _IOR(0x93,0x70,int)
  96
  97
  98 #endif /* _LINUX_AUTO_FS4_H */