| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "libdm/dm_table.h" |
| |
| #include <android-base/logging.h> |
| #include <android-base/macros.h> |
| |
| namespace android { |
| namespace dm { |
| |
| bool DmTable::AddTarget(std::unique_ptr<DmTarget>&& target) { |
| if (!target->Valid()) { |
| return false; |
| } |
| targets_.push_back(std::move(target)); |
| return true; |
| } |
| |
| bool DmTable::RemoveTarget(std::unique_ptr<DmTarget>&& /* target */) { |
| return true; |
| } |
| |
| bool DmTable::valid() const { |
| if (targets_.empty()) { |
| LOG(ERROR) << "Device-mapper table must have at least one target."; |
| return ""; |
| } |
| if (targets_[0]->start() != 0) { |
| LOG(ERROR) << "Device-mapper table must start at logical sector 0."; |
| return ""; |
| } |
| return true; |
| } |
| |
| uint64_t DmTable::num_sectors() const { |
| return valid() ? num_sectors_ : 0; |
| } |
| |
| // Returns a string representation of the table that is ready to be passed |
| // down to the kernel for loading. |
| // |
| // Implementation must verify there are no gaps in the table, table starts |
| // with sector == 0, and iterate over each target to get its table |
| // serialized. |
| std::string DmTable::Serialize() const { |
| if (!valid()) { |
| return ""; |
| } |
| |
| std::string table; |
| for (const auto& target : targets_) { |
| table += target->Serialize(); |
| } |
| return table; |
| } |
| |
| } // namespace dm |
| } // namespace android |