#ifndef _NTIOAPI_H

// Input structure for IOCTL_MOUNTMGR_DELETE_POINTS, IOCTL_MOUNTMGR_QUERY_POINTS, and IOCTL_MOUNTMGR_DELETE_POINTS_DBONLY.
typedef struct _MOUNTMGR_MOUNT_POINT
{
    ULONG SymbolicLinkNameOffset;
    USHORT SymbolicLinkNameLength;
    USHORT Reserved1;
    ULONG UniqueIdOffset;
    USHORT UniqueIdLength;
    USHORT Reserved2;
    ULONG DeviceNameOffset;
    USHORT DeviceNameLength;
    USHORT Reserved3;
} MOUNTMGR_MOUNT_POINT, *PMOUNTMGR_MOUNT_POINT;

#endif
View code on GitHub

// mountmgr.h

typedef struct _MOUNTMGR_MOUNT_POINT {
  ULONG  SymbolicLinkNameOffset;
  USHORT SymbolicLinkNameLength;
  USHORT Reserved1;
  ULONG  UniqueIdOffset;
  USHORT UniqueIdLength;
  USHORT Reserved2;
  ULONG  DeviceNameOffset;
  USHORT DeviceNameLength;
  USHORT Reserved3;
} MOUNTMGR_MOUNT_POINT, *PMOUNTMGR_MOUNT_POINT;
View the official Windows Driver Kit DDI reference

NtDoc

This structure is documented in Windows Driver Kit.

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Windows Driver Kit DDI reference (ns-mountmgr-_mountmgr_mount_point)

Description

The MOUNTMGR_MOUNT_POINT structure is used by mount manager clients in conjunction with an IOCTL_MOUNTMGR_QUERY_POINTS request to query the mount manager for all of the mount points (symbolic links) associated with a device. The mount manager responds by sending an array of MOUNTMGR_MOUNT_POINT structures containing the mount points.

Members

`SymbolicLinkNameOffset`

Contains an offset, in bytes, into the output buffer where the symbolic link is located.

`SymbolicLinkNameLength`

Contains the length, in bytes, of the symbolic link.

`Reserved1`

`UniqueIdOffset`

Contains an offset, in bytes, into the output buffer where the unique ID is located.

`UniqueIdLength`

Contains the length, in bytes, of the unique ID.

`Reserved2`

`DeviceNameOffset`

Contains an offset, in bytes, into the output buffer where the nonpersistent device name is located.

`DeviceNameLength`

Contains the length, in bytes, of the nonpersistent device name.

`Reserved3`

Remarks

None of the names returned are NULL terminated, nor do the buffers require terminating NULL characters. The caller of IOCTL_MOUNTMGR_QUERY_POINTS is not required to provide data in all of the members of the MOUNTMGR_MOUNT_POINT structure, but empty members must have an offset of zero.

On input, offsets are from the beginning of the MOUNTMGR_MOUNT_POINT structure. On output offsets are from the beginning of the buffer. This is usually the same as the beginning of the MOUNTMGR_MOUNT_POINTS container structure (as opposed to the embedded MOUNTMGR_MOUNT_POINT array instance).

The IOCTL_MOUNTMGR_QUERY_POINTS request is available in Windows 2000 and later operating systems.

For more information, see Supporting Mount Manager Requests in a Storage Class Driver.

MOUNTMGR_MOUNT_POINT - NtDoc