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/*
* 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.
*/
package android.os.storage;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.mtp.MtpStorage;
import android.os.Environment;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.UserHandle;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.DebugUtils;
import android.util.SparseArray;
import com.android.internal.util.IndentingPrintWriter;
import com.android.internal.util.Preconditions;
import java.io.CharArrayWriter;
import java.io.File;
/**
* Information about a storage volume that may be mounted. A volume may be a
* partition on a physical {@link DiskInfo}, an emulated volume above some other
* storage medium, or a standalone container like an ASEC or OBB.
*
* @hide
*/
public class VolumeInfo implements Parcelable {
/** Stub volume representing internal private storage */
public static final String ID_PRIVATE_INTERNAL = "private";
/** Real volume representing internal emulated storage */
public static final String ID_EMULATED_INTERNAL = "emulated";
public static final int TYPE_PUBLIC = 0;
public static final int TYPE_PRIVATE = 1;
public static final int TYPE_EMULATED = 2;
public static final int TYPE_ASEC = 3;
public static final int TYPE_OBB = 4;
public static final int STATE_UNMOUNTED = 0;
public static final int STATE_MOUNTING = 1;
public static final int STATE_MOUNTED = 2;
public static final int STATE_FORMATTING = 3;
public static final int STATE_UNMOUNTING = 4;
public static final int STATE_UNMOUNTABLE = 5;
public static final int STATE_REMOVED = 6;
public static final int FLAG_PRIMARY = 1 << 0;
public static final int FLAG_VISIBLE = 1 << 1;
private static SparseArray<String> sStateToEnvironment = new SparseArray<>();
private static ArrayMap<String, String> sEnvironmentToBroadcast = new ArrayMap<>();
static {
sStateToEnvironment.put(VolumeInfo.STATE_UNMOUNTED, Environment.MEDIA_UNMOUNTED);
sStateToEnvironment.put(VolumeInfo.STATE_MOUNTING, Environment.MEDIA_CHECKING);
sStateToEnvironment.put(VolumeInfo.STATE_MOUNTED, Environment.MEDIA_MOUNTED);
sStateToEnvironment.put(VolumeInfo.STATE_FORMATTING, Environment.MEDIA_UNMOUNTED);
sStateToEnvironment.put(VolumeInfo.STATE_UNMOUNTING, Environment.MEDIA_EJECTING);
sStateToEnvironment.put(VolumeInfo.STATE_UNMOUNTABLE, Environment.MEDIA_UNMOUNTABLE);
sStateToEnvironment.put(VolumeInfo.STATE_REMOVED, Environment.MEDIA_REMOVED);
sEnvironmentToBroadcast.put(Environment.MEDIA_UNMOUNTED, Intent.ACTION_MEDIA_UNMOUNTED);
sEnvironmentToBroadcast.put(Environment.MEDIA_CHECKING, Intent.ACTION_MEDIA_CHECKING);
sEnvironmentToBroadcast.put(Environment.MEDIA_MOUNTED, Intent.ACTION_MEDIA_MOUNTED);
sEnvironmentToBroadcast.put(Environment.MEDIA_EJECTING, Intent.ACTION_MEDIA_EJECT);
sEnvironmentToBroadcast.put(Environment.MEDIA_UNMOUNTABLE, Intent.ACTION_MEDIA_UNMOUNTABLE);
sEnvironmentToBroadcast.put(Environment.MEDIA_REMOVED, Intent.ACTION_MEDIA_REMOVED);
}
/** vold state */
public final String id;
public final int type;
public int flags = 0;
public int userId = -1;
public int state = STATE_UNMOUNTED;
public String fsType;
public String fsUuid;
public String fsLabel;
public String path;
/** Framework state */
public final int mtpIndex;
public String nickname;
public VolumeInfo(String id, int type, int mtpIndex) {
this.id = Preconditions.checkNotNull(id);
this.type = type;
this.mtpIndex = mtpIndex;
}
public VolumeInfo(Parcel parcel) {
id = parcel.readString();
type = parcel.readInt();
flags = parcel.readInt();
userId = parcel.readInt();
state = parcel.readInt();
fsType = parcel.readString();
fsUuid = parcel.readString();
fsLabel = parcel.readString();
path = parcel.readString();
mtpIndex = parcel.readInt();
nickname = parcel.readString();
}
public static @NonNull String getEnvironmentForState(int state) {
final String envState = sStateToEnvironment.get(state);
if (envState != null) {
return envState;
} else {
return Environment.MEDIA_UNKNOWN;
}
}
public static @Nullable String getBroadcastForEnvironment(String envState) {
return sEnvironmentToBroadcast.get(envState);
}
public static @Nullable String getBroadcastForState(int state) {
return getBroadcastForEnvironment(getEnvironmentForState(state));
}
public @Nullable String getDescription() {
if (ID_PRIVATE_INTERNAL.equals(id)) {
return Resources.getSystem().getString(com.android.internal.R.string.storage_internal);
} else if (!TextUtils.isEmpty(nickname)) {
return nickname;
} else if (!TextUtils.isEmpty(fsLabel)) {
return fsLabel;
} else {
return null;
}
}
public boolean isPrimary() {
return (flags & FLAG_PRIMARY) != 0;
}
public boolean isVisible() {
return (flags & FLAG_VISIBLE) != 0;
}
public boolean isVisibleToUser(int userId) {
if (type == TYPE_PUBLIC && userId == this.userId) {
return isVisible();
} else if (type == TYPE_EMULATED) {
return isVisible();
} else {
return false;
}
}
public File getPathForUser(int userId) {
if (path == null) {
return null;
} else if (type == TYPE_PUBLIC && userId == this.userId) {
return new File(path);
} else if (type == TYPE_EMULATED) {
return new File(path, Integer.toString(userId));
} else {
return null;
}
}
public StorageVolume buildStorageVolume(Context context, int userId) {
final boolean removable;
final boolean emulated;
final boolean allowMassStorage = false;
final int mtpStorageId = MtpStorage.getStorageIdForIndex(mtpIndex);
final String envState = getEnvironmentForState(state);
File userPath = getPathForUser(userId);
if (userPath == null) {
userPath = new File("/dev/null");
}
String description = getDescription();
if (description == null) {
description = context.getString(android.R.string.unknownName);
}
long mtpReserveSize = 0;
long maxFileSize = 0;
if (type == TYPE_EMULATED) {
emulated = true;
mtpReserveSize = StorageManager.from(context).getStorageLowBytes(userPath);
if (ID_EMULATED_INTERNAL.equals(id)) {
removable = false;
} else {
removable = true;
}
} else if (type == TYPE_PUBLIC) {
emulated = false;
removable = true;
if ("vfat".equals(fsType)) {
maxFileSize = 4294967295L;
}
} else {
throw new IllegalStateException("Unexpected volume type " + type);
}
return new StorageVolume(id, mtpStorageId, userPath, description, isPrimary(), removable,
emulated, mtpReserveSize, allowMassStorage, maxFileSize, new UserHandle(userId),
fsUuid, envState);
}
@Override
public String toString() {
final CharArrayWriter writer = new CharArrayWriter();
dump(new IndentingPrintWriter(writer, " ", 80));
return writer.toString();
}
public void dump(IndentingPrintWriter pw) {
pw.println("VolumeInfo:");
pw.increaseIndent();
pw.printPair("id", id);
pw.printPair("type", DebugUtils.valueToString(getClass(), "TYPE_", type));
pw.printPair("flags", DebugUtils.flagsToString(getClass(), "FLAG_", flags));
pw.printPair("userId", userId);
pw.printPair("state", DebugUtils.valueToString(getClass(), "STATE_", state));
pw.println();
pw.printPair("fsType", fsType);
pw.printPair("fsUuid", fsUuid);
pw.printPair("fsLabel", fsLabel);
pw.println();
pw.printPair("path", path);
pw.printPair("mtpIndex", mtpIndex);
pw.decreaseIndent();
pw.println();
}
@Override
public VolumeInfo clone() {
final Parcel temp = Parcel.obtain();
try {
writeToParcel(temp, 0);
temp.setDataPosition(0);
return CREATOR.createFromParcel(temp);
} finally {
temp.recycle();
}
}
public static final Creator<VolumeInfo> CREATOR = new Creator<VolumeInfo>() {
@Override
public VolumeInfo createFromParcel(Parcel in) {
return new VolumeInfo(in);
}
@Override
public VolumeInfo[] newArray(int size) {
return new VolumeInfo[size];
}
};
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int flags) {
parcel.writeString(id);
parcel.writeInt(type);
parcel.writeInt(this.flags);
parcel.writeInt(userId);
parcel.writeInt(state);
parcel.writeString(fsType);
parcel.writeString(fsUuid);
parcel.writeString(fsLabel);
parcel.writeString(path);
parcel.writeInt(mtpIndex);
parcel.writeString(nickname);
}
}
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