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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 "PublicVolume.h"
#include <volume_manager/VolumeManager.h>
#include "ResponseCode.h"
#include "Utils.h"
#include "fs/Exfat.h"
#include "fs/Ext4.h"
#include "fs/F2fs.h"
#include "fs/Ntfs.h"
#include "fs/Vfat.h"
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <cutils/fs.h>
#include <private/android_filesystem_config.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <sys/types.h>
#include <sys/wait.h>
using android::base::StringPrintf;
namespace android {
namespace volmgr {
PublicVolume::PublicVolume(dev_t device, const std::string& nickname,
const std::string& fstype /* = "" */,
const std::string& mntopts /* = "" */)
: VolumeBase(Type::kPublic), mDevice(device), mFsType(fstype), mMntOpts(mntopts) {
setId(StringPrintf("public:%u_%u", major(device), minor(device)));
setPartLabel(nickname);
mDevPath = StringPrintf("/dev/block/volmgr/%s", getId().c_str());
}
PublicVolume::~PublicVolume() {}
status_t PublicVolume::readMetadata() {
std::string label;
status_t res = ReadMetadataUntrusted(mDevPath, mFsType, mFsUuid, label);
if (!label.empty()) {
setPartLabel(label);
}
VolumeManager::Instance()->notifyEvent(ResponseCode::VolumeFsTypeChanged, mFsType);
VolumeManager::Instance()->notifyEvent(ResponseCode::VolumeFsUuidChanged, mFsUuid);
return res;
}
status_t PublicVolume::doCreate() {
status_t res = CreateDeviceNode(mDevPath, mDevice);
if (res != OK) {
return res;
}
readMetadata();
// Use UUID as stable name, if available
std::string stableName = getId();
if (!mFsUuid.empty()) {
stableName = mFsUuid;
}
setPath(StringPrintf("/storage/%s", stableName.c_str()));
return OK;
}
status_t PublicVolume::doDestroy() {
return DestroyDeviceNode(mDevPath);
}
status_t PublicVolume::doMount() {
if (!IsFilesystemSupported(mFsType)) {
LOG(ERROR) << getId() << " unsupported filesystem " << mFsType;
return -EIO;
}
if (fs_prepare_dir(getPath().c_str(), 0700, AID_ROOT, AID_ROOT)) {
PLOG(ERROR) << getId() << " failed to create mount points";
return -errno;
}
int ret = 0;
if (mFsType == "exfat") {
ret = exfat::Mount(mDevPath, getPath(), AID_MEDIA_RW, AID_MEDIA_RW, 0007);
} else if (mFsType == "ext4") {
ret = ext4::Mount(mDevPath, getPath(), false, false, true, mMntOpts, false, true);
} else if (mFsType == "f2fs") {
ret = f2fs::Mount(mDevPath, getPath(), mMntOpts, false, true);
} else if (mFsType == "ntfs") {
ret =
ntfs::Mount(mDevPath, getPath(), false, false, false, AID_MEDIA_RW, AID_MEDIA_RW, 0007);
} else if (mFsType == "vfat") {
ret = vfat::Mount(mDevPath, getPath(), false, false, false, AID_MEDIA_RW, AID_MEDIA_RW,
0007, true);
} else {
ret = ::mount(mDevPath.c_str(), getPath().c_str(), mFsType.c_str(), 0, nullptr);
}
if (ret) {
PLOG(ERROR) << getId() << " failed to mount " << mDevPath;
return -EIO;
}
return OK;
}
status_t PublicVolume::doUnmount(bool detach /* = false */) {
ForceUnmount(getPath(), detach);
rmdir(getPath().c_str());
return OK;
}
} // namespace volmgr
} // namespace android
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