[net-next-2.6.git] / include / linux / dm-ioctl.h

/*
 * Copyright (C) 2001 - 2003 Sistina Software (UK) Limited.
 * Copyright (C) 2004 - 2009 Red Hat, Inc. All rights reserved.
 *
 * This file is released under the LGPL.
 */

#ifndef _LINUX_DM_IOCTL_V4_H
#define _LINUX_DM_IOCTL_V4_H

#include <linux/types.h>

#define DM_DIR "mapper"		/* Slashes not supported */
#define DM_CONTROL_NODE "control"
#define DM_MAX_TYPE_NAME 16
#define DM_NAME_LEN 128
#define DM_UUID_LEN 129

/*
 * A traditional ioctl interface for the device mapper.
 *
 * Each device can have two tables associated with it, an
 * 'active' table which is the one currently used by io passing
 * through the device, and an 'inactive' one which is a table
 * that is being prepared as a replacement for the 'active' one.
 *
 * DM_VERSION:
 * Just get the version information for the ioctl interface.
 *
 * DM_REMOVE_ALL:
 * Remove all dm devices, destroy all tables.  Only really used
 * for debug.
 *
 * DM_LIST_DEVICES:
 * Get a list of all the dm device names.
 *
 * DM_DEV_CREATE:
 * Create a new device, neither the 'active' or 'inactive' table
 * slots will be filled.  The device will be in suspended state
 * after creation, however any io to the device will get errored
 * since it will be out-of-bounds.
 *
 * DM_DEV_REMOVE:
 * Remove a device, destroy any tables.
 *
 * DM_DEV_RENAME:
 * Rename a device.
 *
 * DM_SUSPEND:
 * This performs both suspend and resume, depending which flag is
 * passed in.
 * Suspend: This command will not return until all pending io to
 * the device has completed.  Further io will be deferred until
 * the device is resumed.
 * Resume: It is no longer an error to issue this command on an
 * unsuspended device.  If a table is present in the 'inactive'
 * slot, it will be moved to the active slot, then the old table
 * from the active slot will be _destroyed_.  Finally the device
 * is resumed.
 *
 * DM_DEV_STATUS:
 * Retrieves the status for the table in the 'active' slot.
 *
 * DM_DEV_WAIT:
 * Wait for a significant event to occur to the device.  This
 * could either be caused by an event triggered by one of the
 * targets of the table in the 'active' slot, or a table change.
 *
 * DM_TABLE_LOAD:
 * Load a table into the 'inactive' slot for the device.  The
 * device does _not_ need to be suspended prior to this command.
 *
 * DM_TABLE_CLEAR:
 * Destroy any table in the 'inactive' slot (ie. abort).
 *
 * DM_TABLE_DEPS:
 * Return a set of device dependencies for the 'active' table.
 *
 * DM_TABLE_STATUS:
 * Return the targets status for the 'active' table.
 *
 * DM_TARGET_MSG:
 * Pass a message string to the target at a specific offset of a device.
 *
 * DM_DEV_SET_GEOMETRY:
 * Set the geometry of a device by passing in a string in this format:
 *
 * "cylinders heads sectors_per_track start_sector"
 *
 * Beware that CHS geometry is nearly obsolete and only provided
 * for compatibility with dm devices that can be booted by a PC
 * BIOS.  See struct hd_geometry for range limits.  Also note that
 * the geometry is erased if the device size changes.
 */

/*
 * 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.
	 */
	__u32 version[3];	/* in/out */
	__u32 data_size;	/* total size of data passed in
				 * including this struct */

	__u32 data_start;	/* offset to start of data
				 * relative to start of this struct */

	__u32 target_count;	/* in/out */
	__s32 open_count;	/* out */
	__u32 flags;		/* in/out */

	/*
	 * event_nr holds either the event number (input and output) or the
	 * udev cookie value (input only).
	 * The DM_DEV_WAIT ioctl takes an event number as input.
	 * The DM_SUSPEND, DM_DEV_REMOVE and DM_DEV_RENAME ioctls
	 * use the field as a cookie to return in the DM_COOKIE
	 * variable with the uevents they issue.
	 * For output, the ioctls return the event number, not the cookie.
	 */
	__u32 event_nr;      	/* in/out */
	__u32 padding;

	__u64 dev;		/* in/out */

	char name[DM_NAME_LEN];	/* device name */
	char uuid[DM_UUID_LEN];	/* unique identifier for
				 * the block device */
	char data[7];		/* padding or data */
};

/*
 * Used to specify tables.  These structures appear after the
 * dm_ioctl.
 */
struct dm_target_spec {
	__u64 sector_start;
	__u64 length;
	__s32 status;		/* used when reading from kernel only */

	/*
	 * Location of the next dm_target_spec.
	 * - When specifying targets on a DM_TABLE_LOAD command, this value is
	 *   the number of bytes from the start of the "current" dm_target_spec
	 *   to the start of the "next" dm_target_spec.
	 * - When retrieving targets on a DM_TABLE_STATUS command, this value
	 *   is the number of bytes from the start of the first dm_target_spec
	 *   (that follows the dm_ioctl struct) to the start of the "next"
	 *   dm_target_spec.
	 */
	__u32 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 {
	__u32 count;	/* Array size */
	__u32 padding;	/* unused */
	__u64 dev[0];	/* out */
};

/*
 * Used to get a list of all dm devices.
 */
struct dm_name_list {
	__u64 dev;
	__u32 next;		/* offset to the next record from
				   the _start_ of this */
	char name[0];
};

/*
 * Used to retrieve the target versions
 */
struct dm_target_versions {
        __u32 next;
        __u32 version[3];

        char name[0];
};

/*
 * Used to pass message to a target
 */
struct dm_target_msg {
	__u64 sector;	/* Device sector */

	char message[0];
};

/*
 * 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,
	DM_LIST_DEVICES_CMD,

	/* device level cmds */
	DM_DEV_CREATE_CMD,
	DM_DEV_REMOVE_CMD,
	DM_DEV_RENAME_CMD,
	DM_DEV_SUSPEND_CMD,
	DM_DEV_STATUS_CMD,
	DM_DEV_WAIT_CMD,

	/* Table level cmds */
	DM_TABLE_LOAD_CMD,
	DM_TABLE_CLEAR_CMD,
	DM_TABLE_DEPS_CMD,
	DM_TABLE_STATUS_CMD,

	/* Added later */
	DM_LIST_VERSIONS_CMD,
	DM_TARGET_MSG_CMD,
	DM_DEV_SET_GEOMETRY_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_LIST_DEVICES  _IOWR(DM_IOCTL, DM_LIST_DEVICES_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_RENAME    _IOWR(DM_IOCTL, DM_DEV_RENAME_CMD, struct dm_ioctl)
#define DM_DEV_SUSPEND   _IOWR(DM_IOCTL, DM_DEV_SUSPEND_CMD, struct dm_ioctl)
#define DM_DEV_STATUS    _IOWR(DM_IOCTL, DM_DEV_STATUS_CMD, struct dm_ioctl)
#define DM_DEV_WAIT      _IOWR(DM_IOCTL, DM_DEV_WAIT_CMD, struct dm_ioctl)

#define DM_TABLE_LOAD    _IOWR(DM_IOCTL, DM_TABLE_LOAD_CMD, struct dm_ioctl)
#define DM_TABLE_CLEAR   _IOWR(DM_IOCTL, DM_TABLE_CLEAR_CMD, struct dm_ioctl)
#define DM_TABLE_DEPS    _IOWR(DM_IOCTL, DM_TABLE_DEPS_CMD, struct dm_ioctl)
#define DM_TABLE_STATUS  _IOWR(DM_IOCTL, DM_TABLE_STATUS_CMD, struct dm_ioctl)

#define DM_LIST_VERSIONS _IOWR(DM_IOCTL, DM_LIST_VERSIONS_CMD, struct dm_ioctl)

#define DM_TARGET_MSG	 _IOWR(DM_IOCTL, DM_TARGET_MSG_CMD, struct dm_ioctl)
#define DM_DEV_SET_GEOMETRY	_IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)

#define DM_VERSION_MAJOR	4
#define DM_VERSION_MINOR	18
#define DM_VERSION_PATCHLEVEL	0
#define DM_VERSION_EXTRA	"-ioctl (2010-06-29)"

/* Status bits */
#define DM_READONLY_FLAG	(1 << 0) /* In/Out */
#define DM_SUSPEND_FLAG		(1 << 1) /* In/Out */
#define DM_PERSISTENT_DEV_FLAG	(1 << 3) /* In */

/*
 * Flag passed into ioctl STATUS command to get table information
 * rather than current status.
 */
#define DM_STATUS_TABLE_FLAG	(1 << 4) /* In */

/*
 * Flags that indicate whether a table is present in either of
 * the two table slots that a device has.
 */
#define DM_ACTIVE_PRESENT_FLAG   (1 << 5) /* Out */
#define DM_INACTIVE_PRESENT_FLAG (1 << 6) /* Out */

/*
 * Indicates that the buffer passed in wasn't big enough for the
 * results.
 */
#define DM_BUFFER_FULL_FLAG	(1 << 8) /* Out */

/*
 * This flag is now ignored.
 */
#define DM_SKIP_BDGET_FLAG	(1 << 9) /* In */

/*
 * Set this to avoid attempting to freeze any filesystem when suspending.
 */
#define DM_SKIP_LOCKFS_FLAG	(1 << 10) /* In */

/*
 * Set this to suspend without flushing queued ios.
 */
#define DM_NOFLUSH_FLAG		(1 << 11) /* In */

/*
 * If set, any table information returned will relate to the inactive
 * table instead of the live one.  Always check DM_INACTIVE_PRESENT_FLAG
 * is set before using the data returned.
 */
#define DM_QUERY_INACTIVE_TABLE_FLAG	(1 << 12) /* In */

/*
 * If set, a uevent was generated for which the caller may need to wait.
 */
#define DM_UEVENT_GENERATED_FLAG	(1 << 13) /* Out */

#endif				/* _LINUX_DM_IOCTL_H */
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Copyright (C) 2001 - 2003 Sistina Software (UK) Limited.
1d0f3ce8	3	* Copyright (C) 2004 - 2009 Red Hat, Inc. All rights reserved.
1da177e4 LT	4	*
	5	* This file is released under the LGPL.
	6	*/
	7
	8	#ifndef _LINUX_DM_IOCTL_V4_H
	9	#define _LINUX_DM_IOCTL_V4_H
	10
	11	#include <linux/types.h>
	12
	13	#define DM_DIR "mapper" /* Slashes not supported */
7e507eb6	14	#define DM_CONTROL_NODE "control"
1da177e4 LT	15	#define DM_MAX_TYPE_NAME 16
	16	#define DM_NAME_LEN 128
	17	#define DM_UUID_LEN 129
	18
	19	/*
	20	* A traditional ioctl interface for the device mapper.
	21	*
	22	* Each device can have two tables associated with it, an
	23	* 'active' table which is the one currently used by io passing
	24	* through the device, and an 'inactive' one which is a table
	25	* that is being prepared as a replacement for the 'active' one.
	26	*
	27	* DM_VERSION:
	28	* Just get the version information for the ioctl interface.
	29	*
	30	* DM_REMOVE_ALL:
	31	* Remove all dm devices, destroy all tables. Only really used
	32	* for debug.
	33	*
	34	* DM_LIST_DEVICES:
	35	* Get a list of all the dm device names.
	36	*
	37	* DM_DEV_CREATE:
	38	* Create a new device, neither the 'active' or 'inactive' table
	39	* slots will be filled. The device will be in suspended state
	40	* after creation, however any io to the device will get errored
	41	* since it will be out-of-bounds.
	42	*
	43	* DM_DEV_REMOVE:
	44	* Remove a device, destroy any tables.
	45	*
	46	* DM_DEV_RENAME:
	47	* Rename a device.
	48	*
	49	* DM_SUSPEND:
	50	* This performs both suspend and resume, depending which flag is
	51	* passed in.
	52	* Suspend: This command will not return until all pending io to
	53	* the device has completed. Further io will be deferred until
	54	* the device is resumed.
	55	* Resume: It is no longer an error to issue this command on an
	56	* unsuspended device. If a table is present in the 'inactive'
	57	* slot, it will be moved to the active slot, then the old table
	58	* from the active slot will be _destroyed_. Finally the device
	59	* is resumed.
	60	*
	61	* DM_DEV_STATUS:
	62	* Retrieves the status for the table in the 'active' slot.
	63	*
	64	* DM_DEV_WAIT:
	65	* Wait for a significant event to occur to the device. This
	66	* could either be caused by an event triggered by one of the
	67	* targets of the table in the 'active' slot, or a table change.
	68	*
	69	* DM_TABLE_LOAD:
	70	* Load a table into the 'inactive' slot for the device. The
	71	* device does _not_ need to be suspended prior to this command.
	72	*
	73	* DM_TABLE_CLEAR:
	74	* Destroy any table in the 'inactive' slot (ie. abort).
	75	*
	76	* DM_TABLE_DEPS:
	77	* Return a set of device dependencies for the 'active' table.
	78	*
79	* DM_TABLE_STATUS:
80	* Return the targets status for the 'active' table.
81	*
82	* DM_TARGET_MSG:
83	* Pass a message string to the target at a specific offset of a device.
3ac51e74 DW	84	*
	85	* DM_DEV_SET_GEOMETRY:
	86	* Set the geometry of a device by passing in a string in this format:
	87	*
	88	* "cylinders heads sectors_per_track start_sector"
	89	*
	90	* Beware that CHS geometry is nearly obsolete and only provided
	91	* for compatibility with dm devices that can be booted by a PC
	92	* BIOS. See struct hd_geometry for range limits. Also note that
	93	* the geometry is erased if the device size changes.
1da177e4 LT	94	*/
	95
	96	/*
	97	* All ioctl arguments consist of a single chunk of memory, with
	98	* this structure at the start. If a uuid is specified any
	99	* lookup (eg. for a DM_INFO) will be done on that, not the
	100	* name.
	101	*/
	102	struct dm_ioctl {
	103	/*
	104	* The version number is made up of three parts:
	105	* major - no backward or forward compatibility,
	106	* minor - only backwards compatible,
	107	* patch - both backwards and forwards compatible.
	108	*
	109	* All clients of the ioctl interface should fill in the
	110	* version number of the interface that they were
	111	* compiled with.
	112	*
	113	* All recognised ioctl commands (ie. those that don't
	114	* return -ENOTTY) fill out this field, even if the
	115	* command failed.
	116	*/
9adfbfb6 AB	117	__u32 version[3]; /* in/out */
9adfbfb6 AB	118	__u32 data_size; /* total size of data passed in
1da177e4 LT	119	* including this struct */
1da177e4 LT	120
9adfbfb6	121	__u32 data_start; /* offset to start of data
1da177e4 LT	122	* relative to start of this struct */
1da177e4 LT	123
9adfbfb6 AB	124	__u32 target_count; /* in/out */
	125	__s32 open_count; /* out */
	126	__u32 flags; /* in/out */
60935eb2 MB	127
	128	/*
	129	* event_nr holds either the event number (input and output) or the
	130	* udev cookie value (input only).
	131	* The DM_DEV_WAIT ioctl takes an event number as input.
	132	* The DM_SUSPEND, DM_DEV_REMOVE and DM_DEV_RENAME ioctls
	133	* use the field as a cookie to return in the DM_COOKIE
	134	* variable with the uevents they issue.
	135	* For output, the ioctls return the event number, not the cookie.
	136	*/
9adfbfb6 AB	137	__u32 event_nr; /* in/out */
9adfbfb6 AB	138	__u32 padding;
1da177e4	139
9adfbfb6	140	__u64 dev; /* in/out */
1da177e4 LT	141
	142	char name[DM_NAME_LEN]; /* device name */
	143	char uuid[DM_UUID_LEN]; /* unique identifier for
	144	* the block device */
027d50f9	145	char data[7]; /* padding or data */
1da177e4 LT	146	};
	147
	148	/*
	149	* Used to specify tables. These structures appear after the
	150	* dm_ioctl.
	151	*/
	152	struct dm_target_spec {
9adfbfb6 AB	153	__u64 sector_start;
	154	__u64 length;
	155	__s32 status; /* used when reading from kernel only */
1da177e4 LT	156
	157	/*
	158	* Location of the next dm_target_spec.
	159	* - When specifying targets on a DM_TABLE_LOAD command, this value is
	160	* the number of bytes from the start of the "current" dm_target_spec
	161	* to the start of the "next" dm_target_spec.
	162	* - When retrieving targets on a DM_TABLE_STATUS command, this value
	163	* is the number of bytes from the start of the first dm_target_spec
	164	* (that follows the dm_ioctl struct) to the start of the "next"
	165	* dm_target_spec.
	166	*/
9adfbfb6	167	__u32 next;
1da177e4 LT	168
	169	char target_type[DM_MAX_TYPE_NAME];
	170
	171	/*
	172	* Parameter string starts immediately after this object.
	173	* Be careful to add padding after string to ensure correct
	174	* alignment of subsequent dm_target_spec.
	175	*/
	176	};
	177
	178	/*
	179	* Used to retrieve the target dependencies.
	180	*/
	181	struct dm_target_deps {
9adfbfb6 AB	182	__u32 count; /* Array size */
	183	__u32 padding; /* unused */
	184	__u64 dev[0]; /* out */
1da177e4 LT	185	};
	186
	187	/*
	188	* Used to get a list of all dm devices.
	189	*/
	190	struct dm_name_list {
9adfbfb6 AB	191	__u64 dev;
9adfbfb6 AB	192	__u32 next; /* offset to the next record from
1da177e4 LT	193	the _start_ of this */
	194	char name[0];
	195	};
	196
	197	/*
	198	* Used to retrieve the target versions
	199	*/
	200	struct dm_target_versions {
9adfbfb6 AB	201	__u32 next;
9adfbfb6 AB	202	__u32 version[3];
1da177e4 LT	203
	204	char name[0];
	205	};
	206
	207	/*
	208	* Used to pass message to a target
	209	*/
	210	struct dm_target_msg {
9adfbfb6	211	__u64 sector; /* Device sector */
1da177e4 LT	212
	213	char message[0];
	214	};
	215
	216	/*
	217	* If you change this make sure you make the corresponding change
	218	* to dm-ioctl.c:lookup_ioctl()
	219	*/
	220	enum {
	221	/* Top level cmds */
	222	DM_VERSION_CMD = 0,
	223	DM_REMOVE_ALL_CMD,
	224	DM_LIST_DEVICES_CMD,
	225
	226	/* device level cmds */
	227	DM_DEV_CREATE_CMD,
	228	DM_DEV_REMOVE_CMD,
	229	DM_DEV_RENAME_CMD,
	230	DM_DEV_SUSPEND_CMD,
	231	DM_DEV_STATUS_CMD,
	232	DM_DEV_WAIT_CMD,
	233
	234	/* Table level cmds */
	235	DM_TABLE_LOAD_CMD,
	236	DM_TABLE_CLEAR_CMD,
	237	DM_TABLE_DEPS_CMD,
	238	DM_TABLE_STATUS_CMD,
	239
	240	/* Added later */
	241	DM_LIST_VERSIONS_CMD,
	242	DM_TARGET_MSG_CMD,
3ac51e74	243	DM_DEV_SET_GEOMETRY_CMD
1da177e4 LT	244	};
1da177e4 LT	245
1da177e4 LT	246	#define DM_IOCTL 0xfd
	247
	248	#define DM_VERSION _IOWR(DM_IOCTL, DM_VERSION_CMD, struct dm_ioctl)
	249	#define DM_REMOVE_ALL _IOWR(DM_IOCTL, DM_REMOVE_ALL_CMD, struct dm_ioctl)
	250	#define DM_LIST_DEVICES _IOWR(DM_IOCTL, DM_LIST_DEVICES_CMD, struct dm_ioctl)
	251
	252	#define DM_DEV_CREATE _IOWR(DM_IOCTL, DM_DEV_CREATE_CMD, struct dm_ioctl)
	253	#define DM_DEV_REMOVE _IOWR(DM_IOCTL, DM_DEV_REMOVE_CMD, struct dm_ioctl)
	254	#define DM_DEV_RENAME _IOWR(DM_IOCTL, DM_DEV_RENAME_CMD, struct dm_ioctl)
	255	#define DM_DEV_SUSPEND _IOWR(DM_IOCTL, DM_DEV_SUSPEND_CMD, struct dm_ioctl)
	256	#define DM_DEV_STATUS _IOWR(DM_IOCTL, DM_DEV_STATUS_CMD, struct dm_ioctl)
	257	#define DM_DEV_WAIT _IOWR(DM_IOCTL, DM_DEV_WAIT_CMD, struct dm_ioctl)
	258
	259	#define DM_TABLE_LOAD _IOWR(DM_IOCTL, DM_TABLE_LOAD_CMD, struct dm_ioctl)
	260	#define DM_TABLE_CLEAR _IOWR(DM_IOCTL, DM_TABLE_CLEAR_CMD, struct dm_ioctl)
	261	#define DM_TABLE_DEPS _IOWR(DM_IOCTL, DM_TABLE_DEPS_CMD, struct dm_ioctl)
	262	#define DM_TABLE_STATUS _IOWR(DM_IOCTL, DM_TABLE_STATUS_CMD, struct dm_ioctl)
	263
	264	#define DM_LIST_VERSIONS _IOWR(DM_IOCTL, DM_LIST_VERSIONS_CMD, struct dm_ioctl)
	265
	266	#define DM_TARGET_MSG _IOWR(DM_IOCTL, DM_TARGET_MSG_CMD, struct dm_ioctl)
3ac51e74	267	#define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
1da177e4 LT	268
1da177e4 LT	269	#define DM_VERSION_MAJOR 4
a5664dad	270	#define DM_VERSION_MINOR 18
1da177e4	271	#define DM_VERSION_PATCHLEVEL 0
a5664dad	272	#define DM_VERSION_EXTRA "-ioctl (2010-06-29)"
1da177e4 LT	273
	274	/* Status bits */
	275	#define DM_READONLY_FLAG (1 << 0) /* In/Out */
	276	#define DM_SUSPEND_FLAG (1 << 1) /* In/Out */
	277	#define DM_PERSISTENT_DEV_FLAG (1 << 3) /* In */
	278
	279	/*
	280	* Flag passed into ioctl STATUS command to get table information
	281	* rather than current status.
	282	*/
	283	#define DM_STATUS_TABLE_FLAG (1 << 4) /* In */
	284
	285	/*
	286	* Flags that indicate whether a table is present in either of
	287	* the two table slots that a device has.
	288	*/
	289	#define DM_ACTIVE_PRESENT_FLAG (1 << 5) /* Out */
	290	#define DM_INACTIVE_PRESENT_FLAG (1 << 6) /* Out */
	291
	292	/*
	293	* Indicates that the buffer passed in wasn't big enough for the
	294	* results.
	295	*/
	296	#define DM_BUFFER_FULL_FLAG (1 << 8) /* Out */
	297
	298	/*
5c6bd75d	299	* This flag is now ignored.
1da177e4 LT	300	*/
	301	#define DM_SKIP_BDGET_FLAG (1 << 9) /* In */
	302
6da487dc AK	303	/*
	304	* Set this to avoid attempting to freeze any filesystem when suspending.
	305	*/
	306	#define DM_SKIP_LOCKFS_FLAG (1 << 10) /* In */
	307
81fdb096 KU	308	/*
	309	* Set this to suspend without flushing queued ios.
	310	*/
	311	#define DM_NOFLUSH_FLAG (1 << 11) /* In */
	312
1d0f3ce8 MS	313	/*
	314	* If set, any table information returned will relate to the inactive
	315	* table instead of the live one. Always check DM_INACTIVE_PRESENT_FLAG
	316	* is set before using the data returned.
	317	*/
	318	#define DM_QUERY_INACTIVE_TABLE_FLAG (1 << 12) /* In */
	319
3abf85b5 PR	320	/*
	321	* If set, a uevent was generated for which the caller may need to wait.
	322	*/
	323	#define DM_UEVENT_GENERATED_FLAG (1 << 13) /* Out */
	324
1da177e4	325	#endif /* _LINUX_DM_IOCTL_H */