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/*
* 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.
*/
#ifndef _LIBDM_TEST_UTILS_H_
#define _LIBDM_TEST_UTILS_H_
#include <android-base/unique_fd.h>
#include <stddef.h>
#include <chrono>
#include <string>
#include <libdm/dm.h>
#include <libdm/dm_table.h>
namespace android {
namespace dm {
// Create a temporary in-memory file. If size is non-zero, the file will be
// created with a fixed size.
android::base::unique_fd CreateTempFile(const std::string& name, size_t size);
// Helper to ensure that device mapper devices are released.
class TempDevice {
public:
TempDevice(const std::string& name, const DmTable& table)
: dm_(DeviceMapper::Instance()), name_(name), valid_(false) {
valid_ = dm_.CreateDevice(name, table, &path_, std::chrono::seconds(5));
}
TempDevice(TempDevice&& other) noexcept
: dm_(other.dm_), name_(other.name_), path_(other.path_), valid_(other.valid_) {
other.valid_ = false;
}
~TempDevice() {
if (valid_) {
dm_.DeleteDevice(name_);
}
}
bool Destroy() {
if (!valid_) {
return false;
}
valid_ = false;
return dm_.DeleteDevice(name_);
}
std::string path() const { return path_; }
const std::string& name() const { return name_; }
bool valid() const { return valid_; }
TempDevice(const TempDevice&) = delete;
TempDevice& operator=(const TempDevice&) = delete;
TempDevice& operator=(TempDevice&& other) noexcept {
name_ = other.name_;
valid_ = other.valid_;
other.valid_ = false;
return *this;
}
private:
DeviceMapper& dm_;
std::string name_;
std::string path_;
bool valid_;
};
} // namespace dm
} // namespace android
#endif // _LIBDM_TEST_UTILS_H_
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