90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
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/*
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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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#ifndef ANDROID_VOLD_PUBLIC_VOLUME_H
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#define ANDROID_VOLD_PUBLIC_VOLUME_H
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#include "VolumeBase.h"
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#include <cutils/multiuser.h>
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namespace android {
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namespace vold {
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/*
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* Shared storage provided by public (vfat) partition.
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*
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* Knows how to mount itself and then spawn a FUSE daemon to synthesize
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* permissions. AsecVolume and ObbVolume can be stacked above it.
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*
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* This volume is not inherently multi-user aware, so it has two possible
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* modes of operation:
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* 1. If primary storage for the device, it only binds itself to the
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* owner user.
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* 2. If secondary storage, it binds itself for all users, but masks
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* away the Android directory for secondary users.
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*/
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class PublicVolume : public VolumeBase {
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public:
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explicit PublicVolume(dev_t device);
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virtual ~PublicVolume();
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status_t readMetadata();
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status_t initAsecStage();
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void setPrimary(bool primary);
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bool getPrimary() { return mPrimary; }
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const std::string& getFsUuid() { return mFsUuid; }
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const std::string& getFsLabel() { return mFsLabel; }
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status_t bindUser(userid_t user);
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status_t unbindUser(userid_t user);
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protected:
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status_t doMount();
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status_t doUnmount();
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status_t doFormat();
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status_t bindUserInternal(userid_t user, bool bind);
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private:
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/* Kernel device representing partition */
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dev_t mDevice;
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/* Block device path */
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std::string mDevPath;
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/* Mount point of raw partition */
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std::string mRawPath;
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/* Mount point of FUSE wrapper */
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std::string mFusePath;
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/* PID of FUSE wrapper */
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pid_t mFusePid;
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/* Flag indicating this is primary storage */
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bool mPrimary;
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/* Parsed UUID from filesystem */
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std::string mFsUuid;
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/* User-visible label from filesystem */
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std::string mFsLabel;
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DISALLOW_COPY_AND_ASSIGN(PublicVolume);
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};
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} // namespace vold
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} // namespace android
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#endif
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