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/KDiskDeviceManager.h

@@ -44,12 +44,13 @@ public:
 
 	KDiskDevice *RegisterDevice(const char *path, bool noShadow = true);
 	KDiskDevice *RegisterDevice(partition_id id, bool noShadow = true);
+	KDiskDevice *RegisterNextDevice(int32 *cookie);
 	KPartition *RegisterPartition(const char *path, bool noShadow = true);
 	KPartition *RegisterPartition(partition_id id, bool noShadow = true);
 
 	// manager must be locked
-	int32 CountDiskDevices();
-	KDiskDevice *DiskDeviceAt(int32 index);
+	int32 CountDevices();
+	KDiskDevice *DeviceAt(int32 index);
 
 	bool PartitionAdded(KPartition *partition);		// implementation internal
 	bool PartitionRemoved(KPartition *partition);	//
@@ -74,16 +75,24 @@ public:
 	int32 CountDiskSystems();
 	KDiskSystem *DiskSystemAt(int32 index);
 
+	KDiskSystem *LoadDiskSystem(disk_system_id id);
+	KDiskSystem *LoadNextDiskSystem(int32 *cookie);
+
 	// Watching
 
 	// TODO: Watching service for the kernel. The userland watching is handled
 	// by the registrar.
 
+	status_t InitialDeviceScan();
+
 private:
 	status_t _AddPartitioningSystem(const char *name);
 	status_t _AddFileSystem(const char *name);
 	status_t _AddDiskSystem(KDiskSystem *diskSystem);
 
+	status_t _Scan(const char *path);
+	status_t _ScanPartition(KPartition *partition);
+
 	BLocker						fLock;
 	List<KDiskDevice*>			fDevices;		// TODO: Optimize!
 	List<KPartition*>			fPartitions;	//