blob: 21479c40ca4344fc500e5d28fee89c065785b04c [file] [log] [blame]
/*
* Copyright (C) 2017 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 "ObbVolume.h"
#include "Devmapper.h"
#include "Loop.h"
#include "Utils.h"
#include "VoldUtil.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 vold {
ObbVolume::ObbVolume(int id, const std::string& sourcePath, const std::string& sourceKey,
gid_t ownerGid)
: VolumeBase(Type::kObb) {
setId(StringPrintf("obb:%d", id));
mSourcePath = sourcePath;
mSourceKey = sourceKey;
mOwnerGid = ownerGid;
}
ObbVolume::~ObbVolume() {}
status_t ObbVolume::doCreate() {
if (Loop::create(mSourcePath, mLoopPath)) {
PLOG(ERROR) << getId() << " failed to create loop";
return -1;
}
if (!mSourceKey.empty()) {
uint64_t nr_sec = 0;
if (GetBlockDev512Sectors(mLoopPath, &nr_sec) != OK) {
PLOG(ERROR) << getId() << " failed to get loop size";
return -1;
}
char tmp[PATH_MAX];
if (Devmapper::create(getId().c_str(), mLoopPath.c_str(), mSourceKey.c_str(), nr_sec, tmp,
PATH_MAX)) {
PLOG(ERROR) << getId() << " failed to create dm";
return -1;
}
mDmPath = tmp;
mMountPath = mDmPath;
} else {
mMountPath = mLoopPath;
}
return OK;
}
status_t ObbVolume::doDestroy() {
if (!mDmPath.empty() && Devmapper::destroy(getId().c_str())) {
PLOG(WARNING) << getId() << " failed to destroy dm";
}
if (!mLoopPath.empty() && Loop::destroyByDevice(mLoopPath.c_str())) {
PLOG(WARNING) << getId() << " failed to destroy loop";
}
mDmPath.clear();
mLoopPath.clear();
return OK;
}
status_t ObbVolume::doMount() {
auto path = StringPrintf("/mnt/obb/%s", getId().c_str());
setPath(path);
if (fs_prepare_dir(path.c_str(), 0700, AID_ROOT, AID_ROOT)) {
PLOG(ERROR) << getId() << " failed to create mount point";
return -1;
}
// clang-format off
if (android::vold::vfat::Mount(mMountPath, path, true, false, true,
0, mOwnerGid, 0227, false)) {
// clang-format on
PLOG(ERROR) << getId() << " failed to mount";
return -1;
}
return OK;
}
status_t ObbVolume::doUnmount() {
auto path = getPath();
KillProcessesUsingPath(path);
ForceUnmount(path);
rmdir(path.c_str());
return OK;
}
} // namespace vold
} // namespace android