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/*
* Copyright (C) 2010 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 com.android.server;
import android.content.Context;
import android.os.Binder;
import android.os.Environment;
import android.os.StatFs;
import android.os.SystemClock;
import android.os.storage.StorageManager;
import android.service.diskstats.DiskStatsAppSizesProto;
import android.service.diskstats.DiskStatsCachedValuesProto;
import android.service.diskstats.DiskStatsFreeSpaceProto;
import android.service.diskstats.DiskStatsServiceDumpProto;
import android.util.Log;
import android.util.Slog;
import android.util.proto.ProtoOutputStream;
import com.android.internal.util.DumpUtils;
import com.android.server.storage.DiskStatsFileLogger;
import com.android.server.storage.DiskStatsLoggingService;
import libcore.io.IoUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
/**
* This service exists only as a "dumpsys" target which reports
* statistics about the status of the disk.
*/
public class DiskStatsService extends Binder {
private static final String TAG = "DiskStatsService";
private static final String DISKSTATS_DUMP_FILE = "/data/system/diskstats_cache.json";
private final Context mContext;
public DiskStatsService(Context context) {
mContext = context;
DiskStatsLoggingService.schedule(context);
}
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (!DumpUtils.checkDumpAndUsageStatsPermission(mContext, TAG, pw)) return;
// Run a quick-and-dirty performance test: write 512 bytes
byte[] junk = new byte[512];
for (int i = 0; i < junk.length; i++) junk[i] = (byte) i; // Write nonzero bytes
File tmp = new File(Environment.getDataDirectory(), "system/perftest.tmp");
FileOutputStream fos = null;
IOException error = null;
long before = SystemClock.uptimeMillis();
try {
fos = new FileOutputStream(tmp);
fos.write(junk);
} catch (IOException e) {
error = e;
} finally {
try { if (fos != null) fos.close(); } catch (IOException e) {}
}
long after = SystemClock.uptimeMillis();
if (tmp.exists()) tmp.delete();
boolean protoFormat = hasOption(args, "--proto");
ProtoOutputStream proto = null;
if (protoFormat) {
proto = new ProtoOutputStream(fd);
pw = null;
proto.write(DiskStatsServiceDumpProto.HAS_TEST_ERROR, error != null);
if (error != null) {
proto.write(DiskStatsServiceDumpProto.ERROR_MESSAGE, error.toString());
} else {
proto.write(DiskStatsServiceDumpProto.WRITE_512B_LATENCY_MILLIS, after - before);
}
} else {
if (error != null) {
pw.print("Test-Error: ");
pw.println(error.toString());
} else {
pw.print("Latency: ");
pw.print(after - before);
pw.println("ms [512B Data Write]");
}
}
reportFreeSpace(Environment.getDataDirectory(), "Data", pw, proto,
DiskStatsFreeSpaceProto.FOLDER_DATA);
reportFreeSpace(Environment.getDownloadCacheDirectory(), "Cache", pw, proto,
DiskStatsFreeSpaceProto.FOLDER_CACHE);
reportFreeSpace(new File("/system"), "System", pw, proto,
DiskStatsFreeSpaceProto.FOLDER_SYSTEM);
boolean fileBased = StorageManager.isFileEncryptedNativeOnly();
boolean blockBased = fileBased ? false : StorageManager.isBlockEncrypted();
if (protoFormat) {
if (fileBased) {
proto.write(DiskStatsServiceDumpProto.ENCRYPTION,
DiskStatsServiceDumpProto.ENCRYPTION_FILE_BASED);
} else if (blockBased) {
proto.write(DiskStatsServiceDumpProto.ENCRYPTION,
DiskStatsServiceDumpProto.ENCRYPTION_FULL_DISK);
} else {
proto.write(DiskStatsServiceDumpProto.ENCRYPTION,
DiskStatsServiceDumpProto.ENCRYPTION_NONE);
}
} else if (fileBased) {
pw.println("File-based Encryption: true");
}
if (protoFormat) {
reportCachedValuesProto(proto);
} else {
reportCachedValues(pw);
}
if (protoFormat) {
proto.flush();
}
// TODO: Read /proc/yaffs and report interesting values;
// add configurable (through args) performance test parameters.
}
private void reportFreeSpace(File path, String name, PrintWriter pw,
ProtoOutputStream proto, int folderType) {
try {
StatFs statfs = new StatFs(path.getPath());
long bsize = statfs.getBlockSize();
long avail = statfs.getAvailableBlocks();
long total = statfs.getBlockCount();
if (bsize <= 0 || total <= 0) {
throw new IllegalArgumentException(
"Invalid stat: bsize=" + bsize + " avail=" + avail + " total=" + total);
}
if (proto != null) {
long freeSpaceToken = proto.start(DiskStatsServiceDumpProto.PARTITIONS_FREE_SPACE);
proto.write(DiskStatsFreeSpaceProto.FOLDER, folderType);
proto.write(DiskStatsFreeSpaceProto.AVAILABLE_SPACE, avail * bsize / 1024);
proto.write(DiskStatsFreeSpaceProto.TOTAL_SPACE, total * bsize / 1024);
proto.end(freeSpaceToken);
} else {
pw.print(name);
pw.print("-Free: ");
pw.print(avail * bsize / 1024);
pw.print("K / ");
pw.print(total * bsize / 1024);
pw.print("K total = ");
pw.print(avail * 100 / total);
pw.println("% free");
}
} catch (IllegalArgumentException e) {
if (proto != null) {
// Empty proto
} else {
pw.print(name);
pw.print("-Error: ");
pw.println(e.toString());
}
return;
}
}
private boolean hasOption(String[] args, String arg) {
for (String opt : args) {
if (arg.equals(opt)) {
return true;
}
}
return false;
}
// If you change this method, make sure to modify the Proto version of this method as well.
private void reportCachedValues(PrintWriter pw) {
try {
String jsonString = IoUtils.readFileAsString(DISKSTATS_DUMP_FILE);
JSONObject json = new JSONObject(jsonString);
pw.print("App Size: ");
pw.println(json.getLong(DiskStatsFileLogger.APP_SIZE_AGG_KEY));
pw.print("App Cache Size: ");
pw.println(json.getLong(DiskStatsFileLogger.APP_CACHE_AGG_KEY));
pw.print("Photos Size: ");
pw.println(json.getLong(DiskStatsFileLogger.PHOTOS_KEY));
pw.print("Videos Size: ");
pw.println(json.getLong(DiskStatsFileLogger.VIDEOS_KEY));
pw.print("Audio Size: ");
pw.println(json.getLong(DiskStatsFileLogger.AUDIO_KEY));
pw.print("Downloads Size: ");
pw.println(json.getLong(DiskStatsFileLogger.DOWNLOADS_KEY));
pw.print("System Size: ");
pw.println(json.getLong(DiskStatsFileLogger.SYSTEM_KEY));
pw.print("Other Size: ");
pw.println(json.getLong(DiskStatsFileLogger.MISC_KEY));
pw.print("Package Names: ");
pw.println(json.getJSONArray(DiskStatsFileLogger.PACKAGE_NAMES_KEY));
pw.print("App Sizes: ");
pw.println(json.getJSONArray(DiskStatsFileLogger.APP_SIZES_KEY));
pw.print("Cache Sizes: ");
pw.println(json.getJSONArray(DiskStatsFileLogger.APP_CACHES_KEY));
} catch (IOException | JSONException e) {
Log.w(TAG, "exception reading diskstats cache file", e);
}
}
private void reportCachedValuesProto(ProtoOutputStream proto) {
try {
String jsonString = IoUtils.readFileAsString(DISKSTATS_DUMP_FILE);
JSONObject json = new JSONObject(jsonString);
long cachedValuesToken = proto.start(DiskStatsServiceDumpProto.CACHED_FOLDER_SIZES);
proto.write(DiskStatsCachedValuesProto.AGG_APPS_SIZE,
json.getLong(DiskStatsFileLogger.APP_SIZE_AGG_KEY));
proto.write(DiskStatsCachedValuesProto.AGG_APPS_CACHE_SIZE,
json.getLong(DiskStatsFileLogger.APP_CACHE_AGG_KEY));
proto.write(DiskStatsCachedValuesProto.PHOTOS_SIZE,
json.getLong(DiskStatsFileLogger.PHOTOS_KEY));
proto.write(DiskStatsCachedValuesProto.VIDEOS_SIZE,
json.getLong(DiskStatsFileLogger.VIDEOS_KEY));
proto.write(DiskStatsCachedValuesProto.AUDIO_SIZE,
json.getLong(DiskStatsFileLogger.AUDIO_KEY));
proto.write(DiskStatsCachedValuesProto.DOWNLOADS_SIZE,
json.getLong(DiskStatsFileLogger.DOWNLOADS_KEY));
proto.write(DiskStatsCachedValuesProto.SYSTEM_SIZE,
json.getLong(DiskStatsFileLogger.SYSTEM_KEY));
proto.write(DiskStatsCachedValuesProto.OTHER_SIZE,
json.getLong(DiskStatsFileLogger.MISC_KEY));
JSONArray packageNamesArray = json.getJSONArray(DiskStatsFileLogger.PACKAGE_NAMES_KEY);
JSONArray appSizesArray = json.getJSONArray(DiskStatsFileLogger.APP_SIZES_KEY);
JSONArray cacheSizesArray = json.getJSONArray(DiskStatsFileLogger.APP_CACHES_KEY);
final int len = packageNamesArray.length();
if (len == appSizesArray.length() && len == cacheSizesArray.length()) {
for (int i = 0; i < len; i++) {
long packageToken = proto.start(DiskStatsCachedValuesProto.APP_SIZES);
proto.write(DiskStatsAppSizesProto.PACKAGE_NAME,
packageNamesArray.getString(i));
proto.write(DiskStatsAppSizesProto.APP_SIZE, appSizesArray.getLong(i));
proto.write(DiskStatsAppSizesProto.CACHE_SIZE, cacheSizesArray.getLong(i));
proto.end(packageToken);
}
} else {
Slog.wtf(TAG, "Sizes of packageNamesArray, appSizesArray and cacheSizesArray "
+ "are not the same");
}
proto.end(cachedValuesToken);
} catch (IOException | JSONException e) {
Log.w(TAG, "exception reading diskstats cache file", e);
}
}
}
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