blob: 307791d9de973592f4f6d8ebd7f5120351fe642e [file] [log] [blame]
/*
* Copyright (C) 2015 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.
*/
#define LOG_TAG "Vold"
#include "Utils.h"
#include "VolumeBase.h"
#include <cutils/log.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
namespace android {
namespace vold {
VolumeBase::VolumeBase(VolumeType type) :
mType(type), mState(VolumeState::kUnmounted) {
}
VolumeBase::~VolumeBase() {
}
void VolumeBase::setState(VolumeState state) {
mState = state;
// TODO: publish state up to framework
}
void VolumeBase::stackVolume(const std::shared_ptr<VolumeBase>& volume) {
mStacked.push_back(volume);
}
void VolumeBase::unstackVolume(const std::shared_ptr<VolumeBase>& volume) {
mStacked.remove(volume);
}
status_t VolumeBase::mount() {
if (getState() != VolumeState::kUnmounted) {
SLOGE("Must be unmounted to mount %s", getId().c_str());
return -EBUSY;
}
setState(VolumeState::kMounting);
status_t res = doMount();
if (!res) {
setState(VolumeState::kMounted);
} else {
setState(VolumeState::kCorrupt);
}
return res;
}
status_t VolumeBase::unmount() {
if (getState() != VolumeState::kMounted) {
SLOGE("Must be mounted to unmount %s", getId().c_str());
return -EBUSY;
}
setState(VolumeState::kUnmounting);
for (std::string target : mBindTargets) {
ForceUnmount(target);
}
mBindTargets.clear();
for (std::shared_ptr<VolumeBase> v : mStacked) {
if (v->unmount()) {
ALOGW("Failed to unmount %s stacked above %s", v->getId().c_str(),
getId().c_str());
}
}
mStacked.clear();
status_t res = doUnmount();
setState(VolumeState::kUnmounted);
return res;
}
status_t VolumeBase::format() {
if (getState() != VolumeState::kUnmounted
|| getState() != VolumeState::kCorrupt) {
SLOGE("Must be unmounted or corrupt to format %s", getId().c_str());
return -EBUSY;
}
setState(VolumeState::kFormatting);
status_t res = doFormat();
setState(VolumeState::kUnmounted);
return res;
}
status_t VolumeBase::doFormat() {
return -ENOTSUP;
}
status_t VolumeBase::mountBind(const std::string& source, const std::string& target) {
if (::mount(source.c_str(), target.c_str(), "", MS_BIND, NULL)) {
SLOGE("Failed to bind mount %s to %s: %s", source.c_str(),
target.c_str(), strerror(errno));
return -errno;
}
mBindTargets.push_back(target);
return OK;
}
status_t VolumeBase::unmountBind(const std::string& target) {
ForceUnmount(target);
mBindTargets.remove(target);
return OK;
}
} // namespace vold
} // namespace android