* Implemented what was left to do for KDiskDevice and KPartition

management regarding removal and deletion of objects.
* Fixed the file disk system related stuff. KFileDiskSystem now uses the
  virtualdrive driver. The former method was seemed simple and brilliant,
  but the B_SET_PARTITION ioctl wouldn't work.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3650 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KDiskDevice.h

@@ -36,8 +36,10 @@ public:
 	// manager lock owners can be sure, that it won't change.
 	bool ReadLock();
 	void ReadUnlock();
+	bool IsReadLocked(bool orWriteLocked = true);
 	bool WriteLock();
 	void WriteUnlock();
+	bool IsWriteLocked();
 
 	virtual void SetID(partition_id id);
 

headers/private/kernel/disk_device_manager/KDiskDeviceManager.h

@@ -53,7 +53,7 @@ public:
 	KFileDiskDevice *RegisterFileDevice(const char *filePath,
 										bool noShadow = true);
 
-	status_t CreateFileDevice(const char *filePath, int32 *device = 0);
+	status_t CreateFileDevice(const char *filePath, partition_id *device = 0);
 	status_t DeleteFileDevice(const char *filePath);
 
 	// manager must be locked
@@ -62,6 +62,7 @@ public:
 
 	bool PartitionAdded(KPartition *partition);		// implementation internal
 	bool PartitionRemoved(KPartition *partition);	//
+	bool DeletePartition(KPartition *partition);	//
 
 	// Jobs
 
@@ -106,9 +107,10 @@ private:
 	status_t _ScanPartition(KPartition *partition);
 
 	BLocker						fLock;
-	List<KDiskDevice*>			fDevices;		// TODO: Optimize!
-	List<KPartition*>			fPartitions;	//
-	List<KDiskSystem*>			fDiskSystems;	//
+	List<KDiskDevice*>			fDevices;				// TODO: Optimize!
+	List<KPartition*>			fPartitions;			//
+	List<KDiskSystem*>			fDiskSystems;			//
+	List<KPartition*>			fObsoletePartitions;	//
 
 	static KDiskDeviceManager	*fDefaultManager;
 };

headers/private/kernel/disk_device_manager/KFileDiskDevice.h

@@ -26,9 +26,9 @@ public:
 
 //	virtual void Dump(bool deep = true, int32 level = 0);
 
-protected:
-	virtual status_t GetMediaStatus(status_t *mediaStatus);
-	virtual status_t GetGeometry(device_geometry *geometry);
+private:
+	static status_t _RegisterDevice(const char *file, const char *device);
+	static status_t _UnregisterDevice(const char *device);
 
 private:
 	char			*fFilePath;

headers/private/kernel/disk_device_manager/KPartition.h

@@ -36,6 +36,13 @@ public:
 	void Unregister();
 	int32 CountReferences() const;
 
+	void MarkObsolete();
+		// called by the manager only
+	bool IsObsolete() const;
+
+	virtual bool PrepareForRemoval();
+	virtual bool PrepareForDeletion();
+
 	status_t Open(int flags, int *fd);
 	virtual status_t PublishDevice();
 	virtual status_t UnpublishDevice();
@@ -122,7 +129,9 @@ public:
 	status_t AddChild(KPartition *partition, int32 index = -1);
 	status_t CreateChild(partition_id id, int32 index,
 						 KPartition **child = NULL);
-	KPartition *RemoveChild(int32 index);
+	bool RemoveChild(int32 index);
+	bool RemoveChild(KPartition *child);
+	bool RemoveAllChildren();
 	KPartition *ChildAt(int32 index) const;
 	int32 CountChildren() const;
 
@@ -137,7 +146,6 @@ public:
 
 	void SetDiskSystem(KDiskSystem *diskSystem);
 	KDiskSystem *DiskSystem() const;
-	void SetParentDiskSystem(KDiskSystem *diskSystem);
 	KDiskSystem *ParentDiskSystem() const;
 		// When setting a disk system, it must already be loaded.
 		// The partition will load it too, hence it won't be unloaded before
@@ -161,8 +169,8 @@ protected:
 	KDiskDevice			*fDevice;
 	KPartition			*fParent;
 	KDiskSystem			*fDiskSystem;
-	KDiskSystem			*fParentDiskSystem;
 	int32				fReferenceCount;
+	bool				fObsolete;
 	static int32		fNextID;
 };