include/linux/auto_dev-ioctl.h

   1 /*
   2  * Copyright 2008 Red Hat, Inc. All rights reserved.
   3  * Copyright 2008 Ian Kent <raven@themaw.net>
   4  *
   5  * This file is part of the Linux kernel and is made available under
   6  * the terms of the GNU General Public License, version 2, or at your
   7  * option, any later version, incorporated herein by reference.
   8  */
   9
  10 #ifndef _LINUX_AUTO_DEV_IOCTL_H
  11 #define _LINUX_AUTO_DEV_IOCTL_H
  12
  13 #include <linux/auto_fs.h>
  14 #include <linux/string.h>
  15
  16 #define AUTOFS_DEVICE_NAME              "autofs"
  17
  18 #define AUTOFS_DEV_IOCTL_VERSION_MAJOR  1
  19 #define AUTOFS_DEV_IOCTL_VERSION_MINOR  0
  20
  21 #define AUTOFS_DEVID_LEN                16
  22
  23 #define AUTOFS_DEV_IOCTL_SIZE           sizeof(struct autofs_dev_ioctl)
  24
  25 /*
  26  * An ioctl interface for autofs mount point control.
  27  */
  28
  29 struct args_protover {
  30         __u32   version;
  31 };
  32
  33 struct args_protosubver {
  34         __u32   sub_version;
  35 };
  36
  37 struct args_openmount {
  38         __u32   devid;
  39 };
  40
  41 struct args_ready {
  42         __u32   token;
  43 };
  44
  45 struct args_fail {
  46         __u32   token;
  47         __s32   status;
  48 };
  49
  50 struct args_setpipefd {
  51         __s32   pipefd;
  52 };
  53
  54 struct args_timeout {
  55         __u64   timeout;
  56 };
  57
  58 struct args_requester {
  59         __u32   uid;
  60         __u32   gid;
  61 };
  62
  63 struct args_expire {
  64         __u32   how;
  65 };
  66
  67 struct args_askumount {
  68         __u32   may_umount;
  69 };
  70
  71 struct args_ismountpoint {
  72         union {
  73                 struct args_in {
  74                         __u32   type;
  75                 } in;
  76                 struct args_out {
  77                         __u32   devid;
  78                         __u32   magic;
  79                 } out;
  80         };
  81 };
  82
  83 /*
  84  * All the ioctls use this structure.
  85  * When sending a path size must account for the total length
  86  * of the chunk of memory otherwise is is the size of the
  87  * structure.
  88  */
  89
  90 struct autofs_dev_ioctl {
  91         __u32 ver_major;
  92         __u32 ver_minor;
  93         __u32 size;             /* total size of data passed in
  94                                  * including this struct */
  95         __s32 ioctlfd;          /* automount command fd */
  96
  97         /* Command parameters */
  98
  99         union {
 100                 struct args_protover            protover;
 101                 struct args_protosubver         protosubver;
 102                 struct args_openmount           openmount;
 103                 struct args_ready               ready;
 104                 struct args_fail                fail;
 105                 struct args_setpipefd           setpipefd;
 106                 struct args_timeout             timeout;
 107                 struct args_requester           requester;
 108                 struct args_expire              expire;
 109                 struct args_askumount           askumount;
 110                 struct args_ismountpoint        ismountpoint;
 111         };
 112
 113         char path[0];
 114 };
 115
 116 static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)
 117 {
 118         memset(in, 0, sizeof(struct autofs_dev_ioctl));
 119         in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
 120         in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
 121         in->size = sizeof(struct autofs_dev_ioctl);
 122         in->ioctlfd = -1;
 123 }
 124
 125 /*
 126  * If you change this make sure you make the corresponding change
 127  * to autofs-dev-ioctl.c:lookup_ioctl()
 128  */
 129 enum {
 130         /* Get various version info */
 131         AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
 132         AUTOFS_DEV_IOCTL_PROTOVER_CMD,
 133         AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
 134
 135         /* Open mount ioctl fd */
 136         AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
 137
 138         /* Close mount ioctl fd */
 139         AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
 140
 141         /* Mount/expire status returns */
 142         AUTOFS_DEV_IOCTL_READY_CMD,
 143         AUTOFS_DEV_IOCTL_FAIL_CMD,
 144
 145         /* Activate/deactivate autofs mount */
 146         AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
 147         AUTOFS_DEV_IOCTL_CATATONIC_CMD,
 148
 149         /* Expiry timeout */
 150         AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
 151
 152         /* Get mount last requesting uid and gid */
 153         AUTOFS_DEV_IOCTL_REQUESTER_CMD,
 154
 155         /* Check for eligible expire candidates */
 156         AUTOFS_DEV_IOCTL_EXPIRE_CMD,
 157
 158         /* Request busy status */
 159         AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
 160
 161         /* Check if path is a mountpoint */
 162         AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
 163 };
 164
 165 #define AUTOFS_IOCTL 0x93
 166
 167 #define AUTOFS_DEV_IOCTL_VERSION \
 168         _IOWR(AUTOFS_IOCTL, \
 169               AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
 170
 171 #define AUTOFS_DEV_IOCTL_PROTOVER \
 172         _IOWR(AUTOFS_IOCTL, \
 173               AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
 174
 175 #define AUTOFS_DEV_IOCTL_PROTOSUBVER \
 176         _IOWR(AUTOFS_IOCTL, \
 177               AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
 178
 179 #define AUTOFS_DEV_IOCTL_OPENMOUNT \
 180         _IOWR(AUTOFS_IOCTL, \
 181               AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
 182
 183 #define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
 184         _IOWR(AUTOFS_IOCTL, \
 185               AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
 186
 187 #define AUTOFS_DEV_IOCTL_READY \
 188         _IOWR(AUTOFS_IOCTL, \
 189               AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
 190
 191 #define AUTOFS_DEV_IOCTL_FAIL \
 192         _IOWR(AUTOFS_IOCTL, \
 193               AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
 194
 195 #define AUTOFS_DEV_IOCTL_SETPIPEFD \
 196         _IOWR(AUTOFS_IOCTL, \
 197               AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
 198
 199 #define AUTOFS_DEV_IOCTL_CATATONIC \
 200         _IOWR(AUTOFS_IOCTL, \
 201               AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
 202
 203 #define AUTOFS_DEV_IOCTL_TIMEOUT \
 204         _IOWR(AUTOFS_IOCTL, \
 205               AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
 206
 207 #define AUTOFS_DEV_IOCTL_REQUESTER \
 208         _IOWR(AUTOFS_IOCTL, \
 209               AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
 210
 211 #define AUTOFS_DEV_IOCTL_EXPIRE \
 212         _IOWR(AUTOFS_IOCTL, \
 213               AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
 214
 215 #define AUTOFS_DEV_IOCTL_ASKUMOUNT \
 216         _IOWR(AUTOFS_IOCTL, \
 217               AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
 218
 219 #define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
 220         _IOWR(AUTOFS_IOCTL, \
 221               AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
 222
 223 #endif  /* _LINUX_AUTO_DEV_IOCTL_H */