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/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*/
#ifndef _LINUX_DM_IOCTL_V1_H
#define _LINUX_DM_IOCTL_V1_H
#include <linux/types.h>
#define DM_DIR "mapper" /* Slashes not supported */
#define DM_MAX_TYPE_NAME 16
#define DM_NAME_LEN 128
#define DM_UUID_LEN 129
/*
* Implements a traditional ioctl interface to the device mapper.
*/
/*
* All ioctl arguments consist of a single chunk of memory, with
* this structure at the start. If a uuid is specified any
* lookup (eg. for a DM_INFO) will be done on that, *not* the
* name.
*/
struct dm_ioctl {
/*
* The version number is made up of three parts:
* major - no backward or forward compatibility,
* minor - only backwards compatible,
* patch - both backwards and forwards compatible.
*
* All clients of the ioctl interface should fill in the
* version number of the interface that they were
* compiled with.
*
* All recognised ioctl commands (ie. those that don't
* return -ENOTTY) fill out this field, even if the
* command failed.
*/
uint32_t version[3]; /* in/out */
uint32_t data_size; /* total size of data passed in
* including this struct */
uint32_t data_start; /* offset to start of data
* relative to start of this struct */
uint32_t target_count; /* in/out */
uint32_t open_count; /* out */
uint32_t flags; /* in/out */
__kernel_old_dev_t dev; /* in/out */
char name[DM_NAME_LEN]; /* device name */
char uuid[DM_UUID_LEN]; /* unique identifier for
* the block device */
};
/*
* Used to specify tables. These structures appear after the
* dm_ioctl.
*/
struct dm_target_spec {
int32_t status; /* used when reading from kernel only */
uint64_t sector_start;
uint32_t length;
/*
* Offset in bytes (from the start of this struct) to
* next target_spec.
*/
uint32_t next;
char target_type[DM_MAX_TYPE_NAME];
/*
* Parameter string starts immediately after this object.
* Be careful to add padding after string to ensure correct
* alignment of subsequent dm_target_spec.
*/
};
/*
* Used to retrieve the target dependencies.
*/
struct dm_target_deps {
uint32_t count;
__kernel_old_dev_t dev[0]; /* out */
};
/*
* If you change this make sure you make the corresponding change
* to dm-ioctl.c:lookup_ioctl()
*/
enum {
/* Top level cmds */
DM_VERSION_CMD = 0,
DM_REMOVE_ALL_CMD,
/* device level cmds */
DM_DEV_CREATE_CMD,
DM_DEV_REMOVE_CMD,
DM_DEV_RELOAD_CMD,
DM_DEV_RENAME_CMD,
DM_DEV_SUSPEND_CMD,
DM_DEV_DEPS_CMD,
DM_DEV_STATUS_CMD,
/* target level cmds */
DM_TARGET_STATUS_CMD,
DM_TARGET_WAIT_CMD
};
#define DM_IOCTL 0xfd
#define DM_VERSION _IOWR(DM_IOCTL, DM_VERSION_CMD, struct dm_ioctl)
#define DM_REMOVE_ALL _IOWR(DM_IOCTL, DM_REMOVE_ALL_CMD, struct dm_ioctl)
#define DM_DEV_CREATE _IOWR(DM_IOCTL, DM_DEV_CREATE_CMD, struct dm_ioctl)
#define DM_DEV_REMOVE _IOWR(DM_IOCTL, DM_DEV_REMOVE_CMD, struct dm_ioctl)
#define DM_DEV_RELOAD _IOWR(DM_IOCTL, DM_DEV_RELOAD_CMD, struct dm_ioctl)
#define DM_DEV_SUSPEND _IOWR(DM_IOCTL, DM_DEV_SUSPEND_CMD, struct dm_ioctl)
#define DM_DEV_RENAME _IOWR(DM_IOCTL, DM_DEV_RENAME_CMD, struct dm_ioctl)
#define DM_DEV_DEPS _IOWR(DM_IOCTL, DM_DEV_DEPS_CMD, struct dm_ioctl)
#define DM_DEV_STATUS _IOWR(DM_IOCTL, DM_DEV_STATUS_CMD, struct dm_ioctl)
#define DM_TARGET_STATUS _IOWR(DM_IOCTL, DM_TARGET_STATUS_CMD, struct dm_ioctl)
#define DM_TARGET_WAIT _IOWR(DM_IOCTL, DM_TARGET_WAIT_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 1
#define DM_VERSION_MINOR 0
#define DM_VERSION_PATCHLEVEL 6
#define DM_VERSION_EXTRA "-ioctl (2002-10-15)"
/* Status bits */
#define DM_READONLY_FLAG 0x00000001
#define DM_SUSPEND_FLAG 0x00000002
#define DM_EXISTS_FLAG 0x00000004
#define DM_PERSISTENT_DEV_FLAG 0x00000008
/*
* Flag passed into ioctl STATUS command to get table information
* rather than current status.
*/
#define DM_STATUS_TABLE_FLAG 0x00000010
#endif /* _LINUX_DM_IOCTL_H */
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