Implemented a preliminary disk device scanning in KDiskDeviceManager.

Some changes to KPartition, KDiskDevice, KDiskSystem on this way.
Still missing is KPartition::Publish() and its invocation in
KDiskDeviceManager. Then everything should be in place to start with
porting the scanning parts of our disk system modules.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3486 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KDiskDevice.h

@@ -23,7 +23,10 @@ public:
 	KDiskDevice(partition_id id = -1);
 	virtual ~KDiskDevice();
 
+	status_t SetTo(const char *path);
+	void Unset();
 	status_t InitCheck() const;
+		// TODO: probably superfluous
 
 	// A read lock owner can be sure that the device (incl. all of its
 	// partitions won't be changed).
@@ -64,6 +67,8 @@ public:
 	team_id ShadowOwner() const;
 
 private:
+	void _InitPartitionData();
+
 	disk_device_data	fDeviceData;
 	RWLocker			fLocker;
 	int					fFD;