| /* |
| * 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_target.h" |
| |
| #include <android-base/logging.h> |
| #include <android-base/macros.h> |
| |
| #include <libdm/dm.h> |
| |
| namespace android { |
| namespace dm { |
| |
| std::string DmTarget::Serialize() const { |
| // Create a string containing a dm_target_spec, parameter data, and an |
| // explicit null terminator. |
| std::string data(sizeof(dm_target_spec), '\0'); |
| data += GetParameterString(); |
| data.push_back('\0'); |
| |
| // The kernel expects each target to be 8-byte aligned. |
| size_t padding = DM_ALIGN(data.size()) - data.size(); |
| for (size_t i = 0; i < padding; i++) { |
| data.push_back('\0'); |
| } |
| |
| // Finally fill in the dm_target_spec. |
| struct dm_target_spec* spec = reinterpret_cast<struct dm_target_spec*>(&data[0]); |
| spec->sector_start = start(); |
| spec->length = size(); |
| strlcpy(spec->target_type, name().c_str(), sizeof(spec->target_type)); |
| spec->next = (uint32_t)data.size(); |
| return data; |
| } |
| |
| std::string DmTargetZero::GetParameterString() const { |
| // The zero target type has no additional parameters. |
| return ""; |
| } |
| |
| std::string DmTargetLinear::GetParameterString() const { |
| return block_device_ + " " + std::to_string(physical_sector_); |
| } |
| |
| } // namespace dm |
| } // namespace android |