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/types.h>
  14
  15 #define AUTOFS_DEVICE_NAME              "autofs"
  16
  17 #define AUTOFS_DEV_IOCTL_VERSION_MAJOR  1
  18 #define AUTOFS_DEV_IOCTL_VERSION_MINOR  0
  19
  20 #define AUTOFS_DEVID_LEN                16
  21
  22 #define AUTOFS_DEV_IOCTL_SIZE           sizeof(struct autofs_dev_ioctl)
  23
  24 /*
  25  * An ioctl interface for autofs mount point control.
  26  */
  27
  28 /*
  29  * All the ioctls use this structure.
  30  * When sending a path size must account for the total length
  31  * of the chunk of memory otherwise is is the size of the
  32  * structure.
  33  */
  34
  35 struct autofs_dev_ioctl {
  36         __u32 ver_major;
  37         __u32 ver_minor;
  38         __u32 size;             /* total size of data passed in
  39                                  * including this struct */
  40         __s32 ioctlfd;          /* automount command fd */
  41
  42         __u32 arg1;             /* Command parameters */
  43         __u32 arg2;
  44
  45         char path[0];
  46 };
  47
  48 static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)
  49 {
  50         in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;
  51         in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;
  52         in->size = sizeof(struct autofs_dev_ioctl);
  53         in->ioctlfd = -1;
  54         in->arg1 = 0;
  55         in->arg2 = 0;
  56         return;
  57 }
  58
  59 /*
  60  * If you change this make sure you make the corresponding change
  61  * to autofs-dev-ioctl.c:lookup_ioctl()
  62  */
  63 enum {
  64         /* Get various version info */
  65         AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,
  66         AUTOFS_DEV_IOCTL_PROTOVER_CMD,
  67         AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,
  68
  69         /* Open mount ioctl fd */
  70         AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,
  71
  72         /* Close mount ioctl fd */
  73         AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,
  74
  75         /* Mount/expire status returns */
  76         AUTOFS_DEV_IOCTL_READY_CMD,
  77         AUTOFS_DEV_IOCTL_FAIL_CMD,
  78
  79         /* Activate/deactivate autofs mount */
  80         AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,
  81         AUTOFS_DEV_IOCTL_CATATONIC_CMD,
  82
  83         /* Expiry timeout */
  84         AUTOFS_DEV_IOCTL_TIMEOUT_CMD,
  85
  86         /* Get mount last requesting uid and gid */
  87         AUTOFS_DEV_IOCTL_REQUESTER_CMD,
  88
  89         /* Check for eligible expire candidates */
  90         AUTOFS_DEV_IOCTL_EXPIRE_CMD,
  91
  92         /* Request busy status */
  93         AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,
  94
  95         /* Check if path is a mountpoint */
  96         AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,
  97 };
  98
  99 #define AUTOFS_IOCTL 0x93
 100
 101 #define AUTOFS_DEV_IOCTL_VERSION \
 102         _IOWR(AUTOFS_IOCTL, \
 103               AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)
 104
 105 #define AUTOFS_DEV_IOCTL_PROTOVER \
 106         _IOWR(AUTOFS_IOCTL, \
 107               AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)
 108
 109 #define AUTOFS_DEV_IOCTL_PROTOSUBVER \
 110         _IOWR(AUTOFS_IOCTL, \
 111               AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)
 112
 113 #define AUTOFS_DEV_IOCTL_OPENMOUNT \
 114         _IOWR(AUTOFS_IOCTL, \
 115               AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)
 116
 117 #define AUTOFS_DEV_IOCTL_CLOSEMOUNT \
 118         _IOWR(AUTOFS_IOCTL, \
 119               AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)
 120
 121 #define AUTOFS_DEV_IOCTL_READY \
 122         _IOWR(AUTOFS_IOCTL, \
 123               AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)
 124
 125 #define AUTOFS_DEV_IOCTL_FAIL \
 126         _IOWR(AUTOFS_IOCTL, \
 127               AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)
 128
 129 #define AUTOFS_DEV_IOCTL_SETPIPEFD \
 130         _IOWR(AUTOFS_IOCTL, \
 131               AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)
 132
 133 #define AUTOFS_DEV_IOCTL_CATATONIC \
 134         _IOWR(AUTOFS_IOCTL, \
 135               AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)
 136
 137 #define AUTOFS_DEV_IOCTL_TIMEOUT \
 138         _IOWR(AUTOFS_IOCTL, \
 139               AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)
 140
 141 #define AUTOFS_DEV_IOCTL_REQUESTER \
 142         _IOWR(AUTOFS_IOCTL, \
 143               AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)
 144
 145 #define AUTOFS_DEV_IOCTL_EXPIRE \
 146         _IOWR(AUTOFS_IOCTL, \
 147               AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)
 148
 149 #define AUTOFS_DEV_IOCTL_ASKUMOUNT \
 150         _IOWR(AUTOFS_IOCTL, \
 151               AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)
 152
 153 #define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \
 154         _IOWR(AUTOFS_IOCTL, \
 155               AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)
 156
 157 #endif  /* _LINUX_AUTO_DEV_IOCTL_H */