Shadow partition related changes:

* Fixed handling of the deletion (removal) of shadow partitions. Formerly
  the shadow partition corresponding to the disk device wasn't removed
  properly.
* Added a shadow_id field to the user_partition_data structure which
  contains the ID of the shadow partition, if it is one. The id field
  will hold the ID of the physical partition.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3974 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KDiskDevice.h

@@ -36,6 +36,8 @@ public:
 	void WriteUnlock();
 	bool IsWriteLocked();
 
+	virtual bool PrepareForRemoval();
+
 	virtual void SetID(partition_id id);
 
 	virtual status_t PublishDevice();
@@ -63,6 +65,8 @@ public:
 	disk_device_data *DeviceData();
 	const disk_device_data *DeviceData() const;
 
+	status_t CreateShadowDevice(team_id team);
+	status_t DeleteShadowDevice();
 	void SetShadowOwner(team_id team);
 	team_id ShadowOwner() const;