#ifndef _NTIOAPI_H

// Input structure for IOCTL_MOUNTMGR_VOLUME_MOUNT_POINT_CREATED and
// IOCTL_MOUNTMGR_VOLUME_MOUNT_POINT_DELETED.
typedef struct _MOUNTMGR_VOLUME_MOUNT_POINT
{
    USHORT SourceVolumeNameOffset;
    USHORT SourceVolumeNameLength;
    USHORT TargetVolumeNameOffset;
    USHORT TargetVolumeNameLength;
} MOUNTMGR_VOLUME_MOUNT_POINT, *PMOUNTMGR_VOLUME_MOUNT_POINT;

#endif
View code on GitHub

// mountmgr.h

typedef struct _MOUNTMGR_VOLUME_MOUNT_POINT {
  USHORT SourceVolumeNameOffset;
  USHORT SourceVolumeNameLength;
  USHORT TargetVolumeNameOffset;
  USHORT TargetVolumeNameLength;
} MOUNTMGR_VOLUME_MOUNT_POINT, *PMOUNTMGR_VOLUME_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_volume_mount_point)

Description

The MOUNTMGR_VOLUME_MOUNT_POINT structure is used in conjunction with the IOCTL_MOUNTMGR_VOLUME_MOUNT_POINT_CREATED request to inform the mount manager that a volume mount point has been created.

Members

`SourceVolumeNameOffset`

Contains an offset, in bytes, into the output buffer where the name of the mount point is located.

`SourceVolumeNameLength`

Contains the length, in bytes, of the mount point name.

`TargetVolumeNameOffset`

Contains an offset, in bytes, into the output buffer where the unique (persistent) volume name of the target device is located.

`TargetVolumeNameLength`

Contains the length, in bytes, of the target name.

Remarks

Mount point names must contain the full path of a mount point object name in the system object tree. For example: "\DosDevices\E:\FilesysD\mnt".

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

MOUNTMGR_VOLUME_MOUNT_POINT - NtDoc