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; }
partition_id _user_find_file_disk_device(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; KPath path(filename, KPath::NORMALIZE); KDiskDeviceManager *manager = KDiskDeviceManager::Default(); // find the device KFileDiskDevice* device = manager->RegisterFileDevice(path.Path()); if (device == NULL) return B_ENTRY_NOT_FOUND; PartitionRegistrar _(device, true); partition_id id = device->ID(); if (neededSize != NULL) { 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_content_parameters(partition_id partitionID, int32* _changeCounter, const char* _parameters) { // copy parameters in UserStringParameter<true> parameters; int32 changeCounter; status_t error = parameters.Init(_parameters, B_DISK_DEVICE_MAX_PARAMETER_SIZE); if (error != B_OK || (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) return B_ENTRY_NOT_FOUND; PartitionRegistrar registrar1(partition, true); PartitionRegistrar registrar2(partition->Device(), true); DeviceWriteLocker locker(partition->Device(), true); // check change counter if (changeCounter != partition->ChangeCounter()) return B_BAD_VALUE; // the partition must be initialized KDiskSystem* diskSystem = partition->DiskSystem(); if (!diskSystem) return B_BAD_VALUE; // mark the partition busy and unlock if (!partition->CheckAndMarkBusy(true)) return B_BUSY; locker.Unlock(); // set content parameters error = diskSystem->SetContentParameters(partition, parameters.value, DUMMY_JOB_ID); // re-lock and unmark busy locker.Lock(); partition->UnmarkBusy(true); if (error != B_OK) return error; // return change counter if ((error = copy_to_user_value(_changeCounter, partition->ChangeCounter())) != B_OK) { return error; } return B_OK; }
status_t _user_set_partition_content_name(partition_id partitionID, int32* _changeCounter, const char* _name) { // copy parameters in UserStringParameter<true> name; int32 changeCounter; status_t error = name.Init(_name, B_DISK_DEVICE_NAME_LENGTH); if (error == B_OK) error = copy_from_user_value(changeCounter, _changeCounter); 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); // check change counter if (changeCounter != partition->ChangeCounter()) return B_BAD_VALUE; // the partition must be initialized KDiskSystem* diskSystem = partition->DiskSystem(); if (diskSystem == NULL) return B_BAD_VALUE; // mark the partition busy and unlock if (!partition->CheckAndMarkBusy(false)) return B_BUSY; locker.Unlock(); // set content parameters error = diskSystem->SetContentName(partition, name.value, DUMMY_JOB_ID); // re-lock and unmark busy locker.Lock(); partition->UnmarkBusy(false); if (error != B_OK) return error; // return change counter return copy_to_user_value(_changeCounter, partition->ChangeCounter()); }
status_t _user_unregister_file_device(partition_id deviceID, const char *_filename) { if (deviceID < 0 && _filename == NULL) return B_BAD_VALUE; KDiskDeviceManager *manager = KDiskDeviceManager::Default(); if (deviceID >= 0) return manager->DeleteFileDevice(deviceID); UserStringParameter<false> filename; status_t error = filename.Init(_filename, B_PATH_NAME_LENGTH); if (error != B_OK) return error; return manager->DeleteFileDevice(filename); }
partition_id _user_register_file_device(const char *_filename) { UserStringParameter<false> filename; status_t error = filename.Init(_filename, B_PATH_NAME_LENGTH); if (error != B_OK) return error; KPath path(filename, true); KDiskDeviceManager *manager = KDiskDeviceManager::Default(); if (ManagerLocker locker = manager) { if (KFileDiskDevice *device = manager->FindFileDevice(path.Path())) return device->ID(); return manager->CreateFileDevice(path.Path()); } return B_ERROR; }
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_create_child_partition(partition_id partitionID, int32* _changeCounter, off_t offset, off_t size, const char* _type, const char* _name, const char* _parameters, partition_id* childID, int32* childChangeCounter) { // copy parameters in UserStringParameter<false> type; UserStringParameter<true> name; UserStringParameter<true> parameters; int32 changeCounter; status_t error = type.Init(_type, B_DISK_DEVICE_TYPE_LENGTH); if (error == B_OK) error = name.Init(_name, B_DISK_DEVICE_NAME_LENGTH); if (error == B_OK) 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) 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); // check change counter if (changeCounter != partition->ChangeCounter()) return B_BAD_VALUE; // the partition must be initialized KDiskSystem* diskSystem = partition->DiskSystem(); if (diskSystem == NULL) return B_BAD_VALUE; // mark the partition busy and unlock if (!partition->CheckAndMarkBusy(false)) return B_BUSY; locker.Unlock(); // create the child KPartition *child = NULL; error = diskSystem->CreateChild(partition, offset, size, type.value, name.value, parameters.value, DUMMY_JOB_ID, &child, -1); // re-lock and unmark busy locker.Lock(); partition->UnmarkBusy(false); if (error != B_OK) return error; if (child == NULL) return B_ERROR; child->UnmarkBusy(true); // return change counter and child ID error = copy_to_user_value(_changeCounter, partition->ChangeCounter()); if (error == B_OK) error = copy_to_user_value(childID, child->ID()); return error; }
status_t _user_initialize_partition(partition_id partitionID, int32* _changeCounter, const char* _diskSystemName, const char* _name, const char* _parameters) { // copy parameters in UserStringParameter<false> diskSystemName; UserStringParameter<true> name; UserStringParameter<true> parameters; int32 changeCounter; status_t error = diskSystemName.Init(_diskSystemName, B_DISK_SYSTEM_NAME_LENGTH); if (error == B_OK) error = name.Init(_name, B_DISK_DEVICE_NAME_LENGTH); if (error == B_OK) 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) 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); // check change counter if (changeCounter != partition->ChangeCounter()) return B_BAD_VALUE; // the partition must be uninitialized if (partition->DiskSystem() != NULL) return B_BAD_VALUE; // load the new disk system KDiskSystem *diskSystem = manager->LoadDiskSystem(diskSystemName.value, true); if (diskSystem == NULL) return B_ENTRY_NOT_FOUND; DiskSystemLoader loader(diskSystem, true); // mark the partition busy and unlock if (!partition->CheckAndMarkBusy(true)) return B_BUSY; locker.Unlock(); // let the disk system initialize the partition error = diskSystem->Initialize(partition, name.value, parameters.value, DUMMY_JOB_ID); // re-lock and unmark busy locker.Lock(); partition->UnmarkBusy(true); if (error != B_OK) return error; // Set the disk system. Re-check whether a disk system is already set on the // partition. Some disk systems just write the on-disk structures and let // the DDM rescan the partition, in which case the disk system will already // be set. In very unfortunate cases the on-disk structure of the previous // disk system has not been destroyed and the previous disk system has a // higher priority than the new one. The old disk system will thus prevail. // Not setting the new disk system will at least prevent that the partition // object gets into an inconsistent state. if (partition->DiskSystem() == NULL) partition->SetDiskSystem(diskSystem); // return change counter return copy_to_user_value(_changeCounter, partition->ChangeCounter()); }
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; }