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/*
* Copyright (C) 2015 The Android Open Source Project
* Copyright (C) 2019 The LineageOS 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 "VolumeBase.h"
#include <volume_manager/ResponseCode.h>
#include <volume_manager/VolumeManager.h>
#include "Utils.h"
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
using android::base::StringPrintf;
namespace android {
namespace volmgr {
VolumeBase::VolumeBase(Type type)
: mType(type), mMountFlags(0), mCreated(false), mState(State::kUnmounted), mSilent(false), mMountable(false) {}
VolumeBase::~VolumeBase() {
CHECK(!mCreated);
}
void VolumeBase::setState(State state) {
mState = state;
VolumeManager::Instance()->notifyEvent(ResponseCode::VolumeStateChanged,
StringPrintf("%d", mState));
}
status_t VolumeBase::setDiskId(const std::string& diskId) {
if (mCreated) {
LOG(WARNING) << getId() << " diskId change requires destroyed";
return -EBUSY;
}
mDiskId = diskId;
return OK;
}
status_t VolumeBase::setPartGuid(const std::string& partGuid) {
if (mCreated) {
LOG(WARNING) << getId() << " partGuid change requires destroyed";
return -EBUSY;
}
mPartGuid = partGuid;
return OK;
}
status_t VolumeBase::setPartLabel(const std::string& partLabel) {
if ((mState != State::kUnmounted) && (mState != State::kUnmountable)) {
LOG(WARNING) << getId() << " partLabel change requires state unmounted or unmountable";
LOG(WARNING) << getId() << " state=" << (int)mState;
}
mPartLabel = partLabel;
return OK;
}
status_t VolumeBase::setMountFlags(int mountFlags) {
if ((mState != State::kUnmounted) && (mState != State::kUnmountable)) {
LOG(WARNING) << getId() << " flags change requires state unmounted or unmountable";
return -EBUSY;
}
mMountFlags = mountFlags;
return OK;
}
status_t VolumeBase::setSilent(bool silent) {
if (mCreated) {
LOG(WARNING) << getId() << " silence change requires destroyed";
return -EBUSY;
}
mSilent = silent;
return OK;
}
status_t VolumeBase::setId(const std::string& id) {
if (mCreated) {
LOG(WARNING) << getId() << " id change requires not created";
return -EBUSY;
}
mId = id;
return OK;
}
status_t VolumeBase::setPath(const std::string& path) {
mPath = path;
VolumeManager::Instance()->notifyEvent(ResponseCode::VolumePathChanged, mPath);
return OK;
}
status_t VolumeBase::create() {
if (mCreated) {
return BAD_VALUE;
}
mCreated = true;
std::vector<std::string> argv;
argv.push_back(StringPrintf("%d", mType));
argv.push_back(mDiskId);
argv.push_back(mPartGuid);
status_t res = doCreate();
if (res == OK) {
VolumeManager::Instance()->notifyEvent(ResponseCode::VolumeCreated, argv);
if (mPartLabel.size() > 0) {
VolumeManager::Instance()->notifyEvent(ResponseCode::VolumeFsLabelChanged, mPartLabel);
}
}
setState(State::kUnmounted);
mMountable = detectMountable();
return res;
}
bool VolumeBase::detectMountable() {
bool mountable = false;
if (doMount() == OK) {
mountable = true;
doUnmount();
}
return mountable;
}
status_t VolumeBase::doCreate() {
return OK;
}
status_t VolumeBase::destroy() {
if (!mCreated) {
return NO_INIT;
}
if (mState == State::kMounted) {
unmount(true /* detatch */);
setState(State::kBadRemoval);
} else {
setState(State::kRemoved);
}
VolumeManager::Instance()->notifyEvent(ResponseCode::VolumeDestroyed);
status_t res = doDestroy();
mCreated = false;
return res;
}
status_t VolumeBase::doDestroy() {
return OK;
}
status_t VolumeBase::mount() {
if ((mState != State::kUnmounted) && (mState != State::kUnmountable)) {
LOG(WARNING) << getId() << " mount requires state unmounted or unmountable";
return -EBUSY;
}
setState(State::kChecking);
status_t res = doMount();
if (res == OK) {
setState(State::kMounted);
} else {
setState(State::kUnmountable);
}
return res;
}
status_t VolumeBase::unmount(bool detach /* = false */) {
setState(State::kEjecting);
status_t res = doUnmount(detach);
setState(State::kUnmounted);
return res;
}
} // namespace volmgr
} // namespace android
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