partition_id
_user_find_partition(const char *_filename, size_t *neededSize)
{
UserStringParameter<false> filename;
status_t error = filename.Init(_filename, B_PATH_NAME_LENGTH);
if (error != B_OK)
return error;
KDiskDeviceManager *manager = KDiskDeviceManager::Default();
// find the partition
KPartition *partition = manager->RegisterPartition(filename);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar _(partition, true);
partition_id id = partition->ID();
if (neededSize != NULL) {
// get and lock the partition's device
KDiskDevice *device = manager->RegisterDevice(partition->ID(), false);
if (device == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar _2(device, true);
if (DeviceReadLocker locker = device) {
// get the needed size
UserDataWriter writer;
device->WriteUserData(writer);
error = copy_to_user_value(neededSize, writer.AllocatedSize());
if (error != B_OK)
return error;
} else
return B_ERROR;
}
return id;
}
status_t
_user_set_partition_parameters(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32* _childChangeCounter, const char* _parameters)
{
// copy parameters in
UserStringParameter<true> parameters;
int32 changeCounter;
int32 childChangeCounter;
status_t error
= parameters.Init(_parameters, B_DISK_DEVICE_MAX_PARAMETER_SIZE);
if (error == B_OK)
error = copy_from_user_value(changeCounter, _changeCounter);
if (error == B_OK)
error = copy_from_user_value(childChangeCounter, _childChangeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (child == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// mark the partition busy and unlock
if (partition->IsBusy() || child->IsBusy())
return B_BUSY;
partition->SetBusy(true);
child->SetBusy(true);
locker.Unlock();
// set the child parameters
error = diskSystem->SetParameters(child, parameters.value, DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->SetBusy(false);
if (error != B_OK)
return error;
// return change counters
error = copy_to_user_value(_changeCounter, partition->ChangeCounter());
if (error == B_OK)
error = copy_to_user_value(_childChangeCounter, child->ChangeCounter());
return error;
}
status_t
_user_resize_partition(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32* _childChangeCounter, off_t size,
off_t contentSize)
{
// copy parameters in
int32 changeCounter;
int32 childChangeCounter;
status_t error = copy_from_user_value(changeCounter, _changeCounter);
if (error == B_OK)
error = copy_from_user_value(childChangeCounter, _childChangeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (child == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// check sizes
if (size < 0 || contentSize < 0 || size < contentSize
|| size > partition->ContentSize()) {
return B_BAD_VALUE;
}
// mark the partitions busy and unlock
if (partition->IsBusy() || child->IsBusy())
return B_BUSY;
partition->SetBusy(true);
child->SetBusy(true);
locker.Unlock();
// resize contents first, if shrinking
if (child->DiskSystem() && contentSize < child->ContentSize())
error = child->DiskSystem()->Resize(child, contentSize, DUMMY_JOB_ID);
// resize the partition
if (error == B_OK && size != child->Size())
error = diskSystem->ResizeChild(child, size, DUMMY_JOB_ID);
// resize contents last, if growing
if (error == B_OK && child->DiskSystem()
&& contentSize > child->ContentSize()) {
error = child->DiskSystem()->Resize(child, contentSize, DUMMY_JOB_ID);
}
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->SetBusy(false);
if (error != B_OK)
return error;
// return change counters
error = copy_to_user_value(_changeCounter, partition->ChangeCounter());
if (error == B_OK)
error = copy_to_user_value(_childChangeCounter, child->ChangeCounter());
return error;
}
status_t
_user_delete_child_partition(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32 childChangeCounter)
{
// copy parameters in
int32 changeCounter;
status_t error;
if ((error = copy_from_user_value(changeCounter, _changeCounter)) != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (child == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (diskSystem == NULL)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// mark the partition and child busy and unlock
if (partition->IsBusy() || !child->CheckAndMarkBusy(true))
return B_BUSY;
partition->SetBusy(true);
locker.Unlock();
// delete the child
error = diskSystem->DeleteChild(child, DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->UnmarkBusy(true);
if (error != B_OK)
return error;
// return change counter
return copy_to_user_value(_changeCounter, partition->ChangeCounter());
}
status_t
_user_uninitialize_partition(partition_id partitionID, int32* _changeCounter,
partition_id parentID, int32* _parentChangeCounter)
{
// copy parameters in
int32 changeCounter;
int32 parentChangeCounter;
bool haveParent = parentID >= 0;
status_t error = copy_from_user_value(changeCounter, _changeCounter);
if (haveParent && error == B_OK)
error = copy_from_user_value(parentChangeCounter, _parentChangeCounter);
if (error != B_OK)
return error;
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (partition == NULL)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register parent
KPartition* parent = NULL;
if (haveParent)
parent = manager->RegisterPartition(parentID);
PartitionRegistrar registrar3(parent, true);
// check change counter
if (changeCounter != partition->ChangeCounter())
return B_BAD_VALUE;
if (haveParent && parentChangeCounter != parent->ChangeCounter())
return B_BAD_VALUE;
// the partition must be initialized
if (partition->DiskSystem() == NULL)
return B_BAD_VALUE;
// check busy
if (!partition->CheckAndMarkBusy(true))
return B_BUSY;
if (partition->IsMounted() || partition->IsChildMounted())
return B_BAD_VALUE;
KDiskSystem* diskSystem = partition->DiskSystem();
locker.Unlock();
// Let the disk system uninitialize the partition. This operation is not
// mandatory. If implemented, it will destroy the on-disk structures, so
// that the disk system cannot accidentally identify the partition later on.
if (diskSystem != NULL)
diskSystem->Uninitialize(partition, DUMMY_JOB_ID);
// re-lock and uninitialize the partition object
locker.Lock();
error = partition->UninitializeContents(true);
partition->UnmarkBusy(true);
if (error != B_OK)
return error;
// return change counter
error = copy_to_user_value(_changeCounter, partition->ChangeCounter());
if (haveParent && error == B_OK)
error = copy_to_user_value(_parentChangeCounter, parent->ChangeCounter());
return error;
}
status_t
_user_set_partition_name(partition_id partitionID, int32* _changeCounter,
partition_id childID, int32* _childChangeCounter, const char* _name)
{
// copy parameters in
UserStringParameter<false> name;
int32 changeCounter;
int32 childChangeCounter;
status_t error;
if ((error = name.Init(_name, B_DISK_DEVICE_NAME_LENGTH)) != B_OK
|| (error = copy_from_user_value(changeCounter, _changeCounter))
!= B_OK
|| (error = copy_from_user_value(childChangeCounter,
_childChangeCounter)) != B_OK) {
return error;
}
// get the partition
KDiskDeviceManager* manager = KDiskDeviceManager::Default();
KPartition* partition = manager->WriteLockPartition(partitionID);
if (!partition)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar1(partition, true);
PartitionRegistrar registrar2(partition->Device(), true);
DeviceWriteLocker locker(partition->Device(), true);
// register child
KPartition* child = manager->RegisterPartition(childID);
if (!child)
return B_ENTRY_NOT_FOUND;
PartitionRegistrar registrar3(child, true);
// check change counters
if (changeCounter != partition->ChangeCounter()
|| childChangeCounter != child->ChangeCounter()) {
return B_BAD_VALUE;
}
// the partition must be initialized
KDiskSystem* diskSystem = partition->DiskSystem();
if (!diskSystem)
return B_BAD_VALUE;
// child must indeed be a child of partition
if (child->Parent() != partition)
return B_BAD_VALUE;
// mark the partitions busy and unlock
if (partition->IsBusy() || child->IsBusy())
return B_BUSY;
partition->SetBusy(true);
child->SetBusy(true);
locker.Unlock();
// set the child name
error = diskSystem->SetName(child, name.value, DUMMY_JOB_ID);
// re-lock and unmark busy
locker.Lock();
partition->SetBusy(false);
child->SetBusy(false);
if (error != B_OK)
return error;
// return change counters
if ((error = copy_to_user_value(_changeCounter, partition->ChangeCounter()))
!= B_OK
|| (error = copy_to_user_value(_childChangeCounter,
child->ChangeCounter())) != B_OK) {
return error;
}
return B_OK;
}
