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/*
* Copyright (C) 2019 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.compat;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.UserHandle;
import android.util.Slog;
import android.util.StatsLog;
import com.android.internal.compat.ChangeReporter;
import com.android.internal.compat.CompatibilityChangeConfig;
import com.android.internal.compat.CompatibilityChangeInfo;
import com.android.internal.compat.IPlatformCompat;
import com.android.internal.util.DumpUtils;
import java.io.FileDescriptor;
import java.io.PrintWriter;
/**
* System server internal API for gating and reporting compatibility changes.
*/
public class PlatformCompat extends IPlatformCompat.Stub {
private static final String TAG = "Compatibility";
private final Context mContext;
private final ChangeReporter mChangeReporter;
public PlatformCompat(Context context) {
mContext = context;
mChangeReporter = new ChangeReporter(
StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__SOURCE__SYSTEM_SERVER);
}
@Override
public void reportChange(long changeId, ApplicationInfo appInfo) {
reportChange(changeId, appInfo.uid,
StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__STATE__LOGGED);
}
@Override
public void reportChangeByPackageName(long changeId, String packageName, int userId) {
ApplicationInfo appInfo = getApplicationInfo(packageName, userId);
if (appInfo == null) {
return;
}
reportChange(changeId, appInfo);
}
@Override
public void reportChangeByUid(long changeId, int uid) {
reportChange(changeId, uid, StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__STATE__LOGGED);
}
@Override
public boolean isChangeEnabled(long changeId, ApplicationInfo appInfo) {
if (CompatConfig.get().isChangeEnabled(changeId, appInfo)) {
reportChange(changeId, appInfo.uid,
StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__STATE__ENABLED);
return true;
}
reportChange(changeId, appInfo.uid,
StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__STATE__DISABLED);
return false;
}
@Override
public boolean isChangeEnabledByPackageName(long changeId, String packageName, int userId) {
ApplicationInfo appInfo = getApplicationInfo(packageName, userId);
if (appInfo == null) {
return true;
}
return isChangeEnabled(changeId, appInfo);
}
@Override
public boolean isChangeEnabledByUid(long changeId, int uid) {
String[] packages = mContext.getPackageManager().getPackagesForUid(uid);
if (packages == null || packages.length == 0) {
return true;
}
boolean enabled = true;
for (String packageName : packages) {
enabled = enabled && isChangeEnabledByPackageName(changeId, packageName,
UserHandle.getUserId(uid));
}
return enabled;
}
@Override
public void setOverrides(CompatibilityChangeConfig overrides, String packageName) {
CompatConfig.get().addOverrides(overrides, packageName);
}
@Override
public void clearOverrides(String packageName) {
CompatConfig config = CompatConfig.get();
config.removePackageOverrides(packageName);
}
@Override
public CompatibilityChangeConfig getAppConfig(ApplicationInfo appInfo) {
return CompatConfig.get().getAppConfig(appInfo);
}
@Override
public CompatibilityChangeInfo[] listAllChanges() {
return CompatConfig.get().dumpChanges();
}
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (!DumpUtils.checkDumpAndUsageStatsPermission(mContext, "platform_compat", pw)) return;
CompatConfig.get().dumpConfig(pw);
}
/**
* Clears information stored about events reported on behalf of an app.
* To be called once upon app start or end. A second call would be a no-op.
* @param appInfo the app to reset
*/
public void resetReporting(ApplicationInfo appInfo) {
mChangeReporter.resetReportedChanges(appInfo.uid);
}
private ApplicationInfo getApplicationInfo(String packageName, int userId) {
try {
return mContext.getPackageManager().getApplicationInfoAsUser(packageName, 0, userId);
} catch (PackageManager.NameNotFoundException e) {
Slog.e(TAG, "No installed package " + packageName);
}
return null;
}
private void reportChange(long changeId, int uid, int state) {
mChangeReporter.reportChange(uid, changeId, state);
}
}
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