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132 lines
3.2 KiB
132 lines
3.2 KiB
/*
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* Copyright (C) 2015 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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#define LOG_TAG "Vold"
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#include "Utils.h"
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#include "VolumeBase.h"
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#include <cutils/log.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/types.h>
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namespace android {
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namespace vold {
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VolumeBase::VolumeBase(VolumeType type) :
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mType(type), mState(VolumeState::kUnmounted) {
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}
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VolumeBase::~VolumeBase() {
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}
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void VolumeBase::setState(VolumeState state) {
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mState = state;
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// TODO: publish state up to framework
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}
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void VolumeBase::stackVolume(const std::shared_ptr<VolumeBase>& volume) {
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mStacked.push_back(volume);
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}
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void VolumeBase::unstackVolume(const std::shared_ptr<VolumeBase>& volume) {
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mStacked.remove(volume);
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}
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status_t VolumeBase::mount() {
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if (getState() != VolumeState::kUnmounted) {
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SLOGE("Must be unmounted to mount %s", getId().c_str());
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return -EBUSY;
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}
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setState(VolumeState::kMounting);
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status_t res = doMount();
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if (!res) {
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setState(VolumeState::kMounted);
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} else {
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setState(VolumeState::kCorrupt);
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}
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return res;
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}
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status_t VolumeBase::unmount() {
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if (getState() != VolumeState::kMounted) {
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SLOGE("Must be mounted to unmount %s", getId().c_str());
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return -EBUSY;
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}
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setState(VolumeState::kUnmounting);
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for (std::string target : mBindTargets) {
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ForceUnmount(target);
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}
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mBindTargets.clear();
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for (std::shared_ptr<VolumeBase> v : mStacked) {
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if (v->unmount()) {
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ALOGW("Failed to unmount %s stacked above %s", v->getId().c_str(),
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getId().c_str());
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}
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}
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mStacked.clear();
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status_t res = doUnmount();
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setState(VolumeState::kUnmounted);
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return res;
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}
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status_t VolumeBase::format() {
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if (getState() != VolumeState::kUnmounted
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|| getState() != VolumeState::kCorrupt) {
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SLOGE("Must be unmounted or corrupt to format %s", getId().c_str());
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return -EBUSY;
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}
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setState(VolumeState::kFormatting);
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status_t res = doFormat();
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setState(VolumeState::kUnmounted);
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return res;
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}
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status_t VolumeBase::doFormat() {
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return -ENOTSUP;
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}
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status_t VolumeBase::mountBind(const std::string& source, const std::string& target) {
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if (::mount(source.c_str(), target.c_str(), "", MS_BIND, NULL)) {
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SLOGE("Failed to bind mount %s to %s: %s", source.c_str(),
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target.c_str(), strerror(errno));
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return -errno;
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}
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mBindTargets.push_back(target);
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return OK;
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}
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status_t VolumeBase::unmountBind(const std::string& target) {
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ForceUnmount(target);
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mBindTargets.remove(target);
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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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