Several changes to the _kern_{supports,validate}_*() calls:

* Removed the disk_system_id parameter where superfluous.
* Got rid of the `child' variants of the _kern_{supports,validate}_*()
  syscalls for moving and resizing. Reimplemented the real ones to do the
  the right thing, i.e. they check all concerned disk systems now.
* Added _kern_supports_setting[_content]_parameters().


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4020 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/ddm_userland_interface.h

@@ -96,73 +96,49 @@ status_t _kern_get_next_disk_system_info(int32 *cookie,
 										 user_disk_system_info *info);
 status_t _kern_find_disk_system(const char *name, user_disk_system_info *info);
 
-bool _kern_supports_defragmenting_partition(disk_system_id diskSystemID,
-											partition_id partitionID,
+bool _kern_supports_defragmenting_partition(partition_id partitionID,
 											bool *whileMounted);
-bool _kern_supports_repairing_partition(disk_system_id diskSystemID,
-										partition_id partitionID,
+bool _kern_supports_repairing_partition(partition_id partitionID,
 										bool checkOnly, bool *whileMounted);
-bool _kern_supports_resizing_partition(disk_system_id diskSystemID,
-									   partition_id partitionID,
+bool _kern_supports_resizing_partition(partition_id partitionID,
+									   bool *canResizeContents,
 									   bool *whileMounted);
-bool _kern_supports_resizing_child_partition(disk_system_id diskSystemID,
-											 partition_id partitionID);
-bool _kern_supports_moving_partition(disk_system_id diskSystemID,
-									 partition_id partitionID,
+bool _kern_supports_moving_partition(partition_id partitionID,
+									 partition_id *buffer, size_t bufferSize,
 									 bool *whileMounted);
-bool _kern_supports_moving_child_partition(disk_system_id diskSystemID,
-										   partition_id partitionID);
-bool _kern_supports_setting_partition_name(disk_system_id diskSystemID,
-										   partition_id partitionID);
-bool _kern_supports_setting_partition_content_name(disk_system_id diskSystemID,
-												   partition_id partitionID,
+bool _kern_supports_setting_partition_name(partition_id partitionID);
+bool _kern_supports_setting_partition_content_name(partition_id partitionID,
 												   bool *whileMounted);
-bool _kern_supports_setting_partition_type(disk_system_id diskSystemID,
-										   partition_id partitionID);
-bool _kern_supports_creating_child_partition(disk_system_id diskSystemID,
-											 partition_id partitionID);
-bool _kern_supports_deleting_child_partition(disk_system_id diskSystemID,
-											 partition_id partitionID);
-bool _kern_supports_initializing_partition(disk_system_id diskSystemID,
-										   partition_id partitionID);
-bool _kern_supports_initializing_child_partition(disk_system_id diskSystemID,
-												 partition_id partitionID,
-												 const char *childSystem);
+bool _kern_supports_setting_partition_type(partition_id partitionID);
+bool _kern_supports_setting_partition_parameters(partition_id partitionID);
+bool _kern_supports_setting_partition_content_parameters(
+	partition_id partitionID, bool *whileMounted);
+bool _kern_supports_initializing_partition(partition_id partitionID,
+										   const char *diskSystemName);
+bool _kern_supports_creating_child_partition(partition_id partitionID);
+bool _kern_supports_deleting_child_partition(partition_id partitionID);
 bool _kern_is_sub_disk_system_for(disk_system_id diskSystemID,
 								  partition_id partitionID);
 
-status_t _kern_validate_resize_partition(disk_system_id diskSystemID,
-										 partition_id partitionID,
-										 off_t *size);
-status_t _kern_validate_resize_child_partition(disk_system_id diskSystemID,
-											   partition_id partitionID,
-											   off_t *size);
-status_t _kern_validate_move_partition(disk_system_id diskSystemID,
-									   partition_id partitionID,
-									   off_t *offset);
-status_t _kern_validate_move_child_partition(disk_system_id diskSystemID,
-											 partition_id partitionID,
-											 off_t *offset);
-status_t _kern_validate_set_partition_name(disk_system_id diskSystemID,
-										   partition_id partitionID,
+status_t _kern_validate_resize_partition(partition_id partitionID,
+										 off_t *size, bool resizeContents);
+status_t _kern_validate_move_partition(partition_id partitionID,
+									   off_t *newOffset, bool force);
+status_t _kern_validate_set_partition_name(partition_id partitionID,
 										   char *name);
-status_t _kern_validate_set_partition_content_name(disk_system_id diskSystemID,
-												   partition_id partitionID,
+status_t _kern_validate_set_partition_content_name(partition_id partitionID,
 												   char *name);
-status_t _kern_validate_set_partition_type(disk_system_id diskSystemID,
-										   partition_id partitionID,
+status_t _kern_validate_set_partition_type(partition_id partitionID,
 										   const char *type);
-status_t _kern_validate_initialize_partition(disk_system_id diskSystemID,
-											 partition_id partitionID,
+status_t _kern_validate_initialize_partition(partition_id partitionID,
+											 const char *diskSystemName,
 											 char *name,
 											 const char *parameters);
-status_t _kern_validate_create_child_partition(disk_system_id diskSystemID,
-											   partition_id partitionID,
+status_t _kern_validate_create_child_partition(partition_id partitionID,
 											   off_t *offset, off_t *size,
 											   const char *type,
 											   const char *parameters);
-status_t _kern_get_next_supported_partition_type(disk_system_id diskSystemID,
-												 partition_id partitionID,
+status_t _kern_get_next_supported_partition_type(partition_id partitionID,
 												 int32 *cookie, char *type);
 status_t _kern_get_partition_type_for_content_type(disk_system_id diskSystemID,
 												   const char *contentType,

src/kernel/core/disk_device_manager/ddm_userland_interface.cpp

@@ -29,6 +29,60 @@ check_shadow_partition(const KPartition *partition)
 			&& partition->Device()->ShadowOwner() == get_current_team());
 }
 
+// get_unmovable_descendants
+static
+bool
+get_unmovable_descendants(KPartition *partition, partition_id *&buffer,
+						  size_t &bufferSize, bool &whileMounted)
+{
+	// check parameters
+	if (!partition || !buffer || bufferSize == 0)
+		return false;
+	// check partition
+	KDiskSystem *diskSystem = partition->DiskSystem();
+	if (!diskSystem || diskSystem->SupportsMoving(partition, &whileMounted)) {
+		buffer[0] = partition->ID();
+		bufferSize--;
+	}
+	// check child partitions
+	for (int32 i = 0; KPartition *child = partition->ChildAt(i); i++) {
+		bool whileChildMounted = false;
+		if (!get_unmovable_descendants(child, buffer, bufferSize,
+									   whileChildMounted)) {
+			return false;
+		}
+		whileMounted &= whileChildMounted;
+	}
+	return true;
+}
+
+// validate_move_descendants
+static
+status_t
+validate_move_descendants(KPartition *partition, off_t moveBy, bool force)
+{
+	if (!partition)
+		return B_BAD_VALUE;
+	// check partition
+	KDiskSystem *diskSystem = partition->DiskSystem();
+	if (diskSystem || diskSystem->SupportsMoving(partition, NULL)) {
+		off_t offset = partition->Offset() + moveBy;
+		off_t newOffset = offset;
+		if (!diskSystem->ValidateMove(partition, &newOffset)
+			|| newOffset != offset) {
+			return B_ERROR;
+		}
+	} else if (!force)
+		return B_ERROR;
+	// check children
+	for (int32 i = 0; KPartition *child = partition->ChildAt(i); i++) {
+		status_t error = validate_move_descendants(child, moveBy, force);
+		if (error != B_OK)
+			return error;
+	}
+	return B_OK;
+}
+
 // _kern_get_next_disk_device_id
 partition_id
 _kern_get_next_disk_device_id(int32 *cookie, size_t *neededSize)
@@ -215,8 +269,7 @@ _kern_find_disk_system(const char *name, user_disk_system_info *info)
 
 // _kern_supports_defragmenting_partition
 bool
-_kern_supports_defragmenting_partition(disk_system_id diskSystemID,
-									   partition_id partitionID,
+_kern_supports_defragmenting_partition(partition_id partitionID,
 									   bool *whileMounted)
 {
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
@@ -231,7 +284,7 @@ _kern_supports_defragmenting_partition(disk_system_id diskSystemID,
 		return false;
 	// get the disk system
 	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return false;
 	// get the info
 	return diskSystem->SupportsDefragmenting(partition, whileMounted);
@@ -239,8 +292,7 @@ _kern_supports_defragmenting_partition(disk_system_id diskSystemID,
 
 // _kern_supports_repairing_partition
 bool
-_kern_supports_repairing_partition(disk_system_id diskSystemID,
-								   partition_id partitionID, bool checkOnly,
+_kern_supports_repairing_partition(partition_id partitionID, bool checkOnly,
 								   bool *whileMounted)
 {
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
@@ -255,7 +307,7 @@ _kern_supports_repairing_partition(disk_system_id diskSystemID,
 		return false;
 	// get the disk system
 	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return false;
 	// get the info
 	return diskSystem->SupportsRepairing(partition, checkOnly, whileMounted);
@@ -263,9 +315,12 @@ _kern_supports_repairing_partition(disk_system_id diskSystemID,
 
 // _kern_supports_resizing_partition
 bool
-_kern_supports_resizing_partition(disk_system_id diskSystemID,
-								  partition_id partitionID, bool *whileMounted)
+_kern_supports_resizing_partition(partition_id partitionID,
+								  bool *canResizeContents,
+								  bool *whileMounted)
 {
+	if (!canResizeContents)
+		return false;
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
 	KPartition *partition = manager->ReadLockPartition(partitionID);
@@ -274,46 +329,35 @@ _kern_supports_resizing_partition(disk_system_id diskSystemID,
 	PartitionRegistrar registrar1(partition, true);
 	PartitionRegistrar registrar2(partition->Device(), true);
 	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
+	if (!check_shadow_partition(partition) || !partition->Parent())
 		return false;
-	// get the disk system
-	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	// get the parent disk system
+	KDiskSystem *parentDiskSystem = partition->Parent()->DiskSystem();
+	if (!parentDiskSystem)
 		return false;
-	// get the info
-	return diskSystem->SupportsResizing(partition, whileMounted);
-}
-
-// _kern_supports_resizing_child_partition
-bool
-_kern_supports_resizing_child_partition(disk_system_id diskSystemID,
-										partition_id partitionID)
-{
-	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
-	// get the partition
-	KPartition *partition = manager->ReadLockPartition(partitionID);
-	if (!partition)
+	bool result = parentDiskSystem->SupportsResizingChild(partition);
+	if (!result)
 		return false;
-	PartitionRegistrar registrar1(partition, true);
-	PartitionRegistrar registrar2(partition->Device(), true);
-	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
-		return false;
-	// get the disk system
-	if (!partition->Parent())
-		return false;
-	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
-		return false;
-	// get the info
-	return diskSystem->SupportsResizingChild(partition);
+	// get the child disk system
+	KDiskSystem *childDiskSystem = partition->DiskSystem();
+	*canResizeContents = (childDiskSystem
+		&& childDiskSystem->SupportsResizing(partition, whileMounted));
+// TODO: Currently we report that we cannot resize the contents, if the
+// partition's disk system is unknown. I found this more logical. It doesn't
+// really matter, though, since the API user can check for this situation.
+	return result;
 }
 
 // _kern_supports_moving_partition
 bool
-_kern_supports_moving_partition(disk_system_id diskSystemID,
-								partition_id partitionID, bool *whileMounted)
+_kern_supports_moving_partition(partition_id partitionID, partition_id *buffer,
+								size_t bufferSize, bool *whileMounted)
 {
+	if (!buffer && bufferSize > 0)
+		return false;
+	bool _whileMounted;
+	if (!whileMounted)
+		_whileMounted = &_whileMounted;
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
 	KPartition *partition = manager->ReadLockPartition(partitionID);
@@ -322,45 +366,27 @@ _kern_supports_moving_partition(disk_system_id diskSystemID,
 	PartitionRegistrar registrar1(partition, true);
 	PartitionRegistrar registrar2(partition->Device(), true);
 	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
+	if (!check_shadow_partition(partition) || !partition->Parent())
 		return false;
-	// get the disk system
-	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	// get the parent disk system
+	KDiskSystem *parentDiskSystem = partition->Parent()->DiskSystem();
+	if (!parentDiskSystem)
 		return false;
-	// get the info
-	return diskSystem->SupportsMoving(partition, whileMounted);
-}
-
-// _kern_supports_moving_child_partition
-bool
-_kern_supports_moving_child_partition(disk_system_id diskSystemID,
-									  partition_id partitionID)
-{
-	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
-	// get the partition
-	KPartition *partition = manager->ReadLockPartition(partitionID);
-	if (!partition)
+	bool result = parentDiskSystem->SupportsMovingChild(partition);
+	if (!result)
 		return false;
-	PartitionRegistrar registrar1(partition, true);
-	PartitionRegistrar registrar2(partition->Device(), true);
-	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
+	// check the movability of the descendants' contents
+	*whileMounted = true;
+	if (!get_unmovable_descendants(partition, buffer, bufferSize,
+								   *whileMounted)) {
 		return false;
-	// get the disk system
-	if (!partition->Parent())
-		return false;
-	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
-		return false;
-	// get the info
-	return diskSystem->SupportsMovingChild(partition);
+	}
+	return result;
 }
 
 // _kern_supports_setting_partition_name
 bool
-_kern_supports_setting_partition_name(disk_system_id diskSystemID,
-									  partition_id partitionID)
+_kern_supports_setting_partition_name(partition_id partitionID)
 {
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
@@ -376,7 +402,7 @@ _kern_supports_setting_partition_name(disk_system_id diskSystemID,
 	if (!partition->Parent())
 		return false;
 	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return false;
 	// get the info
 	return diskSystem->SupportsSettingName(partition);
@@ -384,8 +410,7 @@ _kern_supports_setting_partition_name(disk_system_id diskSystemID,
 
 // _kern_supports_setting_partition_content_name
 bool
-_kern_supports_setting_partition_content_name(disk_system_id diskSystemID,
-											  partition_id partitionID,
+_kern_supports_setting_partition_content_name(partition_id partitionID,
 											  bool *whileMounted)
 {
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
@@ -400,7 +425,7 @@ _kern_supports_setting_partition_content_name(disk_system_id diskSystemID,
 		return false;
 	// get the disk system
 	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return false;
 	// get the info
 	return diskSystem->SupportsSettingContentName(partition, whileMounted);
@@ -408,8 +433,7 @@ _kern_supports_setting_partition_content_name(disk_system_id diskSystemID,
 
 // _kern_supports_setting_partition_type
 bool
-_kern_supports_setting_partition_type(disk_system_id diskSystemID,
-									  partition_id partitionID)
+_kern_supports_setting_partition_type(partition_id partitionID)
 {
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
@@ -425,16 +449,40 @@ _kern_supports_setting_partition_type(disk_system_id diskSystemID,
 	if (!partition->Parent())
 		return false;
 	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return false;
 	// get the info
 	return diskSystem->SupportsSettingType(partition);
 }
 
-// _kern_supports_creating_child_partition
+// _kern_supports_setting_partition_parameters
 bool
-_kern_supports_creating_child_partition(disk_system_id diskSystemID,
-										partition_id partitionID)
+_kern_supports_setting_partition_parameters(partition_id partitionID)
+{
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	// get the partition
+	KPartition *partition = manager->ReadLockPartition(partitionID);
+	if (!partition)
+		return false;
+	PartitionRegistrar registrar1(partition, true);
+	PartitionRegistrar registrar2(partition->Device(), true);
+	DeviceReadLocker locker(partition->Device(), true);
+	if (!check_shadow_partition(partition))
+		return false;
+	// get the disk system
+	if (!partition->Parent())
+		return false;
+	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
+	if (!diskSystem)
+		return false;
+	// get the info
+	return diskSystem->SupportsSettingParameters(partition);
+}
+
+// _kern_supports_setting_partition_content_parameters
+bool
+_kern_supports_setting_partition_content_parameters(partition_id partitionID,
+													bool *whileMounted)
 {
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
@@ -448,7 +496,55 @@ _kern_supports_creating_child_partition(disk_system_id diskSystemID,
 		return false;
 	// get the disk system
 	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
+		return false;
+	// get the info
+	return diskSystem->SupportsSettingContentParameters(partition,
+														whileMounted);
+}
+
+// _kern_supports_initializing_partition
+bool
+_kern_supports_initializing_partition(partition_id partitionID,
+									  const char *diskSystemName)
+{
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	// get the partition
+	KPartition *partition = manager->ReadLockPartition(partitionID);
+	if (!partition)
+		return false;
+	PartitionRegistrar registrar1(partition, true);
+	PartitionRegistrar registrar2(partition->Device(), true);
+	DeviceReadLocker locker(partition->Device(), true);
+	if (!check_shadow_partition(partition))
+		return false;
+	// get the disk system
+	KDiskSystem *diskSystem = manager->LoadDiskSystem(diskSystemName);
+	if (!diskSystem)
+		return false;
+	DiskSystemLoader loader(diskSystem, true);
+	// get the info
+	return diskSystem->SupportsInitializing(partition);
+// TODO: Ask the parent partitioning system as well.
+}
+
+// _kern_supports_creating_child_partition
+bool
+_kern_supports_creating_child_partition(partition_id partitionID)
+{
+	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
+	// get the partition
+	KPartition *partition = manager->ReadLockPartition(partitionID);
+	if (!partition)
+		return false;
+	PartitionRegistrar registrar1(partition, true);
+	PartitionRegistrar registrar2(partition->Device(), true);
+	DeviceReadLocker locker(partition->Device(), true);
+	if (!check_shadow_partition(partition))
+		return false;
+	// get the disk system
+	KDiskSystem *diskSystem = partition->DiskSystem();
+	if (!diskSystem)
 		return false;
 	// get the info
 	return diskSystem->SupportsCreatingChild(partition);
@@ -456,8 +552,7 @@ _kern_supports_creating_child_partition(disk_system_id diskSystemID,
 
 // _kern_supports_deleting_child_partition
 bool
-_kern_supports_deleting_child_partition(disk_system_id diskSystemID,
-										partition_id partitionID)
+_kern_supports_deleting_child_partition(partition_id partitionID)
 {
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
@@ -473,62 +568,12 @@ _kern_supports_deleting_child_partition(disk_system_id diskSystemID,
 	if (!partition->Parent())
 		return false;
 	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return false;
 	// get the info
 	return diskSystem->SupportsDeletingChild(partition);
 }
 
-// _kern_supports_initializing_partition
-bool
-_kern_supports_initializing_partition(disk_system_id diskSystemID,
-									  partition_id partitionID)
-{
-	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
-	// get the partition
-	KPartition *partition = manager->ReadLockPartition(partitionID);
-	if (!partition)
-		return false;
-	PartitionRegistrar registrar1(partition, true);
-	PartitionRegistrar registrar2(partition->Device(), true);
-	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
-		return false;
-	// get the disk system
-	KDiskSystem *diskSystem = manager->LoadDiskSystem(diskSystemID);
-	if (!diskSystem)
-		return false;
-	DiskSystemLoader loader(diskSystem, true);
-	// get the info
-	return diskSystem->SupportsInitializing(partition);
-}
-
-// _kern_supports_initializing_child_partition
-bool
-_kern_supports_initializing_child_partition(disk_system_id diskSystemID,
-											partition_id partitionID,
-											const char *childSystem)
-{
-	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
-	// get the partition
-	KPartition *partition = manager->ReadLockPartition(partitionID);
-	if (!partition)
-		return false;
-	PartitionRegistrar registrar1(partition, true);
-	PartitionRegistrar registrar2(partition->Device(), true);
-	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
-		return false;
-	// get the disk system
-	if (!partition->Parent())
-		return false;
-	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
-		return false;
-	// get the info
-	return diskSystem->SupportsInitializingChild(partition, childSystem);
-}
-
 // _kern_is_sub_disk_system_for
 bool
 _kern_is_sub_disk_system_for(disk_system_id diskSystemID,
@@ -554,8 +599,8 @@ _kern_is_sub_disk_system_for(disk_system_id diskSystemID,
 
 // _kern_validate_resize_partition
 status_t
-_kern_validate_resize_partition(disk_system_id diskSystemID,
-								partition_id partitionID, off_t *size)
+_kern_validate_resize_partition(partition_id partitionID, off_t *size,
+								bool resizeContents)
 {
 	if (!size)
 		return B_BAD_VALUE;
@@ -567,53 +612,35 @@ _kern_validate_resize_partition(disk_system_id diskSystemID,
 	PartitionRegistrar registrar1(partition, true);
 	PartitionRegistrar registrar2(partition->Device(), true);
 	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
+	if (!check_shadow_partition(partition) || !partition->Parent())
 		return B_BAD_VALUE;
-	// get the disk system
-	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	// get the parent disk system and let it check the value
+	KDiskSystem *parentDiskSystem = partition->Parent()->DiskSystem();
+	if (!parentDiskSystem)
 		return B_ENTRY_NOT_FOUND;
-	// get the info
-	if (diskSystem->ValidateResize(partition, size))
-		return B_OK;
-	return B_ERROR;
-}
-
-// _kern_validate_resize_child_partition
-status_t
-_kern_validate_resize_child_partition(disk_system_id diskSystemID,
-									  partition_id partitionID, off_t *size)
-{
-	if (!size)
-		return B_BAD_VALUE;
-	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
-	// get the partition
-	KPartition *partition = manager->ReadLockPartition(partitionID);
-	if (!partition)
-		return B_ENTRY_NOT_FOUND;
-	PartitionRegistrar registrar1(partition, true);
-	PartitionRegistrar registrar2(partition->Device(), true);
-	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
-		return B_BAD_VALUE;
-	// get the disk system
-	if (!partition->Parent())
-		return B_BAD_VALUE;
-	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
-		return B_ENTRY_NOT_FOUND;
-	// get the info
-	if (diskSystem->ValidateResizeChild(partition, size))
-		return B_OK;
-	return B_ERROR;
+	status_t error = parentDiskSystem->ValidateResizeChild(partition, size);
+	if (error != B_OK)
+		return error;
+	// get the child disk system and let it check the value
+	if (resizeContents) {
+		KDiskSystem *childDiskSystem = partition->DiskSystem();
+		if (!childDiskSystem)
+			return B_ENTRY_NOT_FOUND;
+		off_t childSize = *size;
+		error = childDiskSystem->ValidateResize(partition, &childSize);
+		// don't worry, if the content system desires to be smaller
+		if (error == B_OK && childSize > *size)
+			error = B_ERROR;
+	}
+	return error;
 }
 
 // _kern_validate_move_partition
 status_t
-_kern_validate_move_partition(disk_system_id diskSystemID,
-							  partition_id partitionID, off_t *offset)
+_kern_validate_move_partition(partition_id partitionID, off_t *newOffset,
+							  bool force)
 {
-	if (!offset)
+	if (!newOffset)
 		return B_BAD_VALUE;
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
@@ -623,54 +650,25 @@ _kern_validate_move_partition(disk_system_id diskSystemID,
 	PartitionRegistrar registrar1(partition, true);
 	PartitionRegistrar registrar2(partition->Device(), true);
 	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
+	if (!check_shadow_partition(partition) || !partition->Parent())
 		return B_BAD_VALUE;
-	// get the disk system
-	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	// get the parent disk system and let it check the value
+	KDiskSystem *parentDiskSystem = partition->Parent()->DiskSystem();
+	if (!parentDiskSystem)
 		return B_ENTRY_NOT_FOUND;
-	// get the info
-	if (diskSystem->ValidateMove(partition, offset))
-		return B_OK;
-	return B_ERROR;
-}
-
-// _kern_validate_move_child_partition
-status_t
-_kern_validate_move_child_partition(disk_system_id diskSystemID,
-									partition_id partitionID, off_t *offset)
-{
-	if (!offset)
-		return B_BAD_VALUE;
-	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
-	// get the partition
-	KPartition *partition = manager->ReadLockPartition(partitionID);
-	if (!partition)
-		return B_ENTRY_NOT_FOUND;
-	PartitionRegistrar registrar1(partition, true);
-	PartitionRegistrar registrar2(partition->Device(), true);
-	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
-		return B_BAD_VALUE;
-	// get the disk system
-	if (!partition->Parent())
-		return B_BAD_VALUE;
-	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
-		return B_ENTRY_NOT_FOUND;
-	// get the info
-	if (diskSystem->ValidateMoveChild(partition, offset))
-		return B_OK;
-	return B_ERROR;
+	status_t error = parentDiskSystem->ValidateMoveChild(partition, newOffset);
+	if (error != B_OK)
+		return error;
+	// let the concerned content disk systems check the value
+	error = validate_move_descendants(partition,
+									  partition->Offset() - *newOffset, force);
+	return error;
 }
 
 // _kern_validate_set_partition_name
 status_t
-_kern_validate_set_partition_name(disk_system_id diskSystemID,
-								  partition_id partitionID, char *name)
+_kern_validate_set_partition_name(partition_id partitionID, char *name)
 {
-	if (!name)
-		return B_BAD_VALUE;
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
 	KPartition *partition = manager->ReadLockPartition(partitionID);
@@ -679,13 +677,11 @@ _kern_validate_set_partition_name(disk_system_id diskSystemID,
 	PartitionRegistrar registrar1(partition, true);
 	PartitionRegistrar registrar2(partition->Device(), true);
 	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
+	if (!check_shadow_partition(partition) || !partition->Parent())
 		return B_BAD_VALUE;
 	// get the disk system
-	if (!partition->Parent())
-		return B_BAD_VALUE;
 	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return B_ENTRY_NOT_FOUND;
 	// get the info
 	if (diskSystem->ValidateSetName(partition, name))
@@ -695,11 +691,8 @@ _kern_validate_set_partition_name(disk_system_id diskSystemID,
 
 // _kern_validate_set_partition_content_name
 status_t
-_kern_validate_set_partition_content_name(disk_system_id diskSystemID,
-										  partition_id partitionID, char *name)
+_kern_validate_set_partition_content_name(partition_id partitionID, char *name)
 {
-	if (!name)
-		return B_BAD_VALUE;
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
 	KPartition *partition = manager->ReadLockPartition(partitionID);
@@ -712,7 +705,7 @@ _kern_validate_set_partition_content_name(disk_system_id diskSystemID,
 		return B_BAD_VALUE;
 	// get the disk system
 	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return B_ENTRY_NOT_FOUND;
 	// get the info
 	if (diskSystem->ValidateSetContentName(partition, name))
@@ -722,8 +715,7 @@ _kern_validate_set_partition_content_name(disk_system_id diskSystemID,
 
 // _kern_validate_set_partition_type
 status_t
-_kern_validate_set_partition_type(disk_system_id diskSystemID,
-								  partition_id partitionID, const char *type)
+_kern_validate_set_partition_type(partition_id partitionID, const char *type)
 {
 	if (!type)
 		return B_BAD_VALUE;
@@ -735,13 +727,11 @@ _kern_validate_set_partition_type(disk_system_id diskSystemID,
 	PartitionRegistrar registrar1(partition, true);
 	PartitionRegistrar registrar2(partition->Device(), true);
 	DeviceReadLocker locker(partition->Device(), true);
-	if (!check_shadow_partition(partition))
+	if (!check_shadow_partition(partition) || !partition->Parent())
 		return B_BAD_VALUE;
 	// get the disk system
-	if (!partition->Parent())
-		return B_BAD_VALUE;
 	KDiskSystem *diskSystem = partition->Parent()->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return B_ENTRY_NOT_FOUND;
 	// get the info
 	if (diskSystem->ValidateSetType(partition, type))
@@ -751,10 +741,12 @@ _kern_validate_set_partition_type(disk_system_id diskSystemID,
 
 // _kern_validate_initialize_partition
 status_t
-_kern_validate_initialize_partition(disk_system_id diskSystemID,
-									partition_id partitionID, char *name,
+_kern_validate_initialize_partition(partition_id partitionID,
+									const char *diskSystemName, char *name,
 									const char *parameters)
 {
+	if (!diskSystemName)
+		return B_BAD_VALUE;
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
 	KPartition *partition = manager->ReadLockPartition(partitionID);
@@ -766,7 +758,7 @@ _kern_validate_initialize_partition(disk_system_id diskSystemID,
 	if (!check_shadow_partition(partition))
 		return B_BAD_VALUE;
 	// get the disk system
-	KDiskSystem *diskSystem = manager->LoadDiskSystem(diskSystemID);
+	KDiskSystem *diskSystem = manager->LoadDiskSystem(diskSystemName);
 	if (!diskSystem)
 		return B_ENTRY_NOT_FOUND;
 	DiskSystemLoader loader(diskSystem, true);
@@ -776,8 +768,7 @@ _kern_validate_initialize_partition(disk_system_id diskSystemID,
 
 // _kern_validate_create_child_partition
 status_t
-_kern_validate_create_child_partition(disk_system_id diskSystemID,
-									  partition_id partitionID, off_t *offset,
+_kern_validate_create_child_partition(partition_id partitionID, off_t *offset,
 									  off_t *size, const char *type,
 									  const char *parameters)
 {
@@ -795,7 +786,7 @@ _kern_validate_create_child_partition(disk_system_id diskSystemID,
 		return B_BAD_VALUE;
 	// get the disk system
 	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return B_ENTRY_NOT_FOUND;
 	// get the info
 	if (diskSystem->ValidateCreateChild(partition, offset, size, type,
@@ -807,8 +798,7 @@ _kern_validate_create_child_partition(disk_system_id diskSystemID,
 
 // _kern_get_next_supported_partition_type
 status_t
-_kern_get_next_supported_partition_type(disk_system_id diskSystemID,
-										partition_id partitionID,
+_kern_get_next_supported_partition_type(partition_id partitionID,
 										int32 *cookie, char *type)
 {
 	if (!cookie || !type)
@@ -825,7 +815,7 @@ _kern_get_next_supported_partition_type(disk_system_id diskSystemID,
 		return B_BAD_VALUE;
 	// get the disk system
 	KDiskSystem *diskSystem = partition->DiskSystem();
-	if (!diskSystem || diskSystem->ID() != diskSystemID)
+	if (!diskSystem)
 		return B_ENTRY_NOT_FOUND;
 	// get the info
 	if (diskSystem->GetNextSupportedType(partition, cookie, type))