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121 lines
3.3 KiB
121 lines
3.3 KiB
/* |
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* Copyright (C) 2017 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include "ObbVolume.h" |
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#include "Devmapper.h" |
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#include "Loop.h" |
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#include "Utils.h" |
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#include "VoldUtil.h" |
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#include "fs/Vfat.h" |
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#include <android-base/logging.h> |
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#include <android-base/stringprintf.h> |
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#include <cutils/fs.h> |
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#include <private/android_filesystem_config.h> |
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#include <fcntl.h> |
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#include <stdlib.h> |
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#include <sys/mount.h> |
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#include <sys/stat.h> |
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#include <sys/sysmacros.h> |
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#include <sys/types.h> |
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#include <sys/wait.h> |
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using android::base::StringPrintf; |
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namespace android { |
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namespace vold { |
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ObbVolume::ObbVolume(int id, const std::string& sourcePath, const std::string& sourceKey, |
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gid_t ownerGid) |
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: VolumeBase(Type::kObb) { |
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setId(StringPrintf("obb:%d", id)); |
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mSourcePath = sourcePath; |
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mSourceKey = sourceKey; |
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mOwnerGid = ownerGid; |
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} |
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ObbVolume::~ObbVolume() {} |
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status_t ObbVolume::doCreate() { |
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if (Loop::create(mSourcePath, mLoopPath)) { |
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PLOG(ERROR) << getId() << " failed to create loop"; |
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return -1; |
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} |
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if (!mSourceKey.empty()) { |
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uint64_t nr_sec = 0; |
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if (GetBlockDev512Sectors(mLoopPath, &nr_sec) != OK) { |
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PLOG(ERROR) << getId() << " failed to get loop size"; |
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return -1; |
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} |
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char tmp[PATH_MAX]; |
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if (Devmapper::create(getId().c_str(), mLoopPath.c_str(), mSourceKey.c_str(), nr_sec, tmp, |
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PATH_MAX)) { |
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PLOG(ERROR) << getId() << " failed to create dm"; |
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return -1; |
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} |
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mDmPath = tmp; |
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mMountPath = mDmPath; |
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} else { |
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mMountPath = mLoopPath; |
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} |
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return OK; |
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} |
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status_t ObbVolume::doDestroy() { |
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if (!mDmPath.empty() && Devmapper::destroy(getId().c_str())) { |
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PLOG(WARNING) << getId() << " failed to destroy dm"; |
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} |
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if (!mLoopPath.empty() && Loop::destroyByDevice(mLoopPath.c_str())) { |
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PLOG(WARNING) << getId() << " failed to destroy loop"; |
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} |
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mDmPath.clear(); |
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mLoopPath.clear(); |
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return OK; |
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} |
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status_t ObbVolume::doMount() { |
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auto path = StringPrintf("/mnt/obb/%s", getId().c_str()); |
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setPath(path); |
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if (fs_prepare_dir(path.c_str(), 0700, AID_ROOT, AID_ROOT)) { |
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PLOG(ERROR) << getId() << " failed to create mount point"; |
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return -1; |
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} |
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// clang-format off |
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if (android::vold::vfat::Mount(mMountPath, path, true, false, true, |
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0, mOwnerGid, 0227, false)) { |
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// clang-format on |
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PLOG(ERROR) << getId() << " failed to mount"; |
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return -1; |
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} |
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return OK; |
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} |
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status_t ObbVolume::doUnmount() { |
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auto path = getPath(); |
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KillProcessesUsingPath(path); |
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ForceUnmount(path); |
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rmdir(path.c_str()); |
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return OK; |
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} |
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} // namespace vold |
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} // namespace android
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