625dc787c6
Helpers to get a block device size in bytes or 512 byte sectors, using BLKGETSIZE64 and returning value of uint64_t type. This also removes get_blkdev_size(). Test: build, manual, mount exFAT volume Bug: 80202067 Change-Id: Ib07e8ac6ef7ff49de0ed570d1fa202e8b558b80c
121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
/*
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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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